JP6924676B2 - Dust collection hood - Google Patents

Description

The present invention relates to a dust collecting hood attached to the motor in order to suck the dust removed by blowing air into the inside of the motor together with the air from the exhaust port of the motor.

Conventionally, there has been known an air-blown dust collector that removes dust adhering to the inside of an electric motor by air blowing and sucks and collects air containing the removed dust.

For example, the rotor air hole cleaning mechanism of the traction motor for vehicles described in Patent Document 1 has an air blow nozzle provided with a screw of the same size as a bearing box mounting bolt on the side to which an air hose is connected during air blow cleaning. It is provided by replacing one of the bearing box mounting bolts. This makes it possible to attach an air hose to send compressed air and clean the rotor air holes.

JP-A-2007-20258

The dust removed by the air blow cleaning is exhausted from the traction motor together with the compressed air, but the rotor air hole cleaning mechanism described above does not fully consider the recovery of the dust contained in the air. In addition, a suction hose or the like may be attached to the exhaust port of the traction motor in order to collect dust, but since the space around the traction motor mounted on the trolley is small, a suction hose or the like is attached to the traction motor. It was not easy to install properly.

The present invention provides a dust collecting hood that can be appropriately and easily attached to and detached from the electric motor in order to solve the above-mentioned problems.

In order to achieve the above object, the first dust collecting hood of the present invention is attached to the motor to suck the dust removed by blowing air into the inside of the motor together with the air from the exhaust port of the motor. A hood body having a suction port arranged corresponding to the exhaust port, and a hood body provided on the hood body and connected to the motor to attach the hood body to the motor and from the motor. A connection portion that disengages the hood body from the motor by separating it, and a connection portion that is provided on the hood body and that rotates in one direction contacts the outer surface of the motor and rotates in the other direction. It is provided with a holding portion that is separated from the outer surface of the motor.

According to the first dust collecting hood of the present invention, the hood body can be appropriately attached to the motor by connecting the connecting portion to the motor and bringing the holding portion into contact with the outer surface of the motor. The hood body can be removed from the motor by separating the connecting portion from the motor and separating the holding portion from the outer surface of the motor. As a result, the dust collecting hood can be appropriately and easily attached to and detached from the electric motor.

The second dust collecting hood of the present invention is the first dust collecting hood of the present invention described above, wherein the holding portion extends outward from the suction port of the hood body and faces the electric motor. It is preferable to include a holding arm of.

According to the second dust collecting hood of the present invention, since the pair of holding arms sandwich the dust collecting hood so as to hold the motor, the dust collecting hood can be maintained in a state of being attached to the motor. Further, since the pair of holding arms extend to the outside of the hood body, it is possible to enter the narrow space around the motor and to sandwich the motor.

The third dust collecting hood of the present invention is the first dust collecting hood of the present invention described above, wherein the motor is formed in a cylindrical shape, and the holding portion is outward from the suction port of the hood body. It is preferable that the holding arm includes a holding arm formed in an extended state, and the holding arm has a shape curved along the outer peripheral surface of the electric motor.

According to the third dust collecting hood of the present invention, since the holding arm is curved, it is possible to securely hold the cylindrical motor. Further, since the holding arm extends to the outside of the hood body, it is possible to enter the narrow space around the motor.

The fourth dust collecting hood of the present invention is the second or third dust collecting hood of the present invention described above, wherein the holding arm is formed with an opening corresponding to the exhaust port, and the holding arm is provided with an opening. A hollow cover that covers the opening and communicates with the inside of the hood body is fixed, and an outside air introduction port for taking in outside air into the inside of the cover is opened on the tip surface of the cover. preferable.

According to the fourth dust collecting hood of the present invention, the dust-containing air that has passed through the opening of the holding arm and has flowed into the inside of the cover is merged with the outside air introduced into the inside of the cover from the outside air introduction port and downstream. Can be swept to the side. As a result, the suction force of the dust-containing air is improved, so that the dust-containing air can be efficiently sucked.

The fifth dust collecting hood of the present invention is the fourth dust collecting hood of the present invention described above, wherein the hood body has a discharge port for discharging air containing dust taken in from the suction port and the hood body. A first flow path through which air introduced from the opening and the outside air introduction port flows, and a second flow path through which air introduced from the suction port excluding the opening and the outside air introduction port flows. The partition plate includes a flow path and a partition plate for partitioning the flow path, and the partition plate is provided at a position deviated from the center of the discharge port so that the flow rate of the first flow path is larger than that of the second flow path. Is preferable.

According to the fifth dust collecting hood of the present invention, since the first flow path can flow more dust-containing air than the second flow path, the air introduced from the opening and the outside air introduction port can be efficiently flowed. Can be shed.

The sixth dust collecting hood of the present invention is the dust collecting hood of any one of the first to fifth aspects of the present invention described above, wherein the electric motor is formed in a cylindrical shape, and the exhaust port is an outer peripheral surface of the electric motor. It is preferable that the edge portion formed in the hood body and forming the suction port of the hood body has a curved shape along the outer peripheral surface of the electric motor.

According to the sixth dust collecting hood of the present invention, since the edge portion of the suction port is curved along the outer peripheral surface of the motor, the edge portion of the suction port can be brought into close contact with the outer peripheral surface of the motor. As a result, the suction port of the hood body is arranged to face the exhaust port of the motor, so that the dust-containing air flowing out from the exhaust port can be appropriately guided to the inside of the hood body, and the leakage of the dust-containing air can be suppressed. Can be done.

The seventh dust collecting hood of the present invention is the dust collecting hood of any one of the first to sixth aspects of the present invention, wherein the connecting portion is connected to one side of the center of the motor, and the holding portion is , It is preferable to contact the other side of the motor rather than the center.

According to the seventh dust collecting hood of the present invention, the motor can be sandwiched from both sides by sandwiching the center of the motor by the connecting portion and the holding portion. As a result, the dust collecting hood can be securely attached to the motor.

Further, in order to achieve the above object, the eighth dust collecting hood of the present invention is attached to the motor to suck the dust removed by blowing air into the inside of the motor together with the air from the exhaust port of the motor. A hood body that is a dust collecting hood and has a suction port that is arranged corresponding to the exhaust port, and a hood body that is provided on the hood body and is connected to the motor to attach the hood body to the motor. A first that is erected between a connection portion that disengages the hood body from the motor by separating it from the motor and two rails on which the wheels rotated by the motor roll, and that moves along the rail. The hood is connected to a base, a second base provided on the first base and moving in the erection direction of the first base, the second base and the hood body, and rotated in one direction. It is provided with a connection rotating portion that separates the hood body from the outer surface of the motor by bringing the main body into contact with the outer surface of the motor and rotating it in another direction.

According to the eighth dust collecting hood of the present invention, the hood body can be moved on a flat surface by the first base and the second base. Further, by rotating the hood body by the connection rotating portion, the hood body can be brought into contact with or separated from the outer surface of the motor. This makes it possible to easily align the hood body (suction port) with respect to the exhaust port of the motor.

The ninth dust collecting hood of the present invention is the position of the eighth dust collecting hood of the present invention described above, in which the movement of the second base is restricted and the position with respect to the first base is fixed. It is preferable that a fixing mechanism is provided.

According to the ninth dust collecting hood of the present invention, the movement of the hood body in the erection direction can be restricted by the position fixing mechanism. As a result, the hood body can be stably rotated while the hood body is fixed at an arbitrary position in the erection direction.

According to the present invention, the dust collecting hood can be appropriately and easily attached to and detached from the electric motor.

It is a perspective view which shows the air-blown dust collector, the railroad vehicle, and the like which concerns on 1st Embodiment of this invention. It is a front view which shows a part of the electric motor which concerns on 1st Embodiment of this invention. It is a side view which shows the dust collector hood, the electric motor and the like which concerns on 1st Embodiment of this invention. It is a front view which shows a part of the dust collecting hood, the electric motor, etc. which concerns on 1st Embodiment of this invention. It is a side view which shows a part of the dust collecting hood, the electric motor and the like which concerns on 1st Embodiment of this invention. It is a side view which shows a part of the holding part of the dust collecting hood which concerns on 1st Embodiment of this invention. It is a side view which shows the dust collector hood, the electric motor and the like which concerns on 2nd Embodiment of this invention. It is a side view which shows a part of the dust collecting hood, the electric motor, etc. which concerns on 2nd Embodiment of this invention. It is a side view which shows the holding arm with a cover of the dust collecting hood which concerns on 2nd Embodiment of this invention. It is a front view which shows the holding arm with a cover of the dust collecting hood which concerns on 2nd Embodiment of this invention. It is a perspective view which shows the dust collecting hood, the railroad vehicle and the like which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the dust collecting hood, the electric motor and the like which concerns on 3rd Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each figure, "Fr" indicates "front", "Rr" indicates "rear", "L" indicates "left", "R" indicates "right", and "U" indicates "right". "Upper" indicates "upper" and "D" indicates "lower". As described above, although terms indicating directions and positions are used in the present specification for convenience of explanation, these terms do not limit the technical scope of the present invention.

[First Embodiment]
The air-blown dust collector 1 including the dust collecting hood 5 according to the first embodiment will be described with reference to FIGS. 1 to 6. FIG. 1 is a perspective view showing an air-blown dust collector 1 and a railroad vehicle 100 and the like. FIG. 2 is a front view showing a part of the electric motor 106. FIG. 3 is a side view showing the dust collecting hood 5, the electric motor 106, and the like. FIG. 4 is a front view showing a part of the dust collecting hood 5 and the electric motor 106 and the like. FIG. 5 is a side view showing a part of the dust collecting hood 5 and the electric motor 106 and the like. FIG. 6 is a side view showing a part of the holding portion 30 and the like of the dust collecting hood 5.

The air-blown dust collector 1 is a device that air-cleans the inside of the electric motor 106 mounted on the bogie 102 of the railway vehicle 100. Specifically, the air-blown dust collector 1 blows off the dust adhering to the inner wall surface of the electric motor 106 by the compressed air sent into the electric motor 106, and the air containing the dust exhausted from the inside of the electric motor 106 to the outside. (Hereinafter, also referred to as "dust-containing air") is collected while being sucked. In the present specification, "air blowing" and similar terms refer to blowing compressed air to blow off dust in the motor 106 and similar concepts.

[Railway vehicle]
First, the railroad vehicle 100 that is the target of the air blowing work will be described. As shown in FIG. 1, the railway vehicle 100 includes a vehicle body 101 and a bogie 102 fixed to an underfloor portion thereof. The bogie 102 includes an underframe 103, two axles 104, four wheels 105, and two motors 106. The vehicle body 101 is supported on the underframe 103.

The underframe 103 has an erection frame 103B bridged between a pair of left and right support frames 103A, and is formed in a substantially H shape when viewed from a plane. The two axles 104 are arranged on both front and rear sides of the underframe 103 with the erection frame 103B interposed therebetween. Each of the two axles 104 is erected between a pair of support frames 103A, and is rotatably supported around the shaft by the pair of support frames 103A. The wheels 105 are fixed to both left and right ends of the axle 104. The two wheels 105 fixed to the axle 104 are mounted on the two rails 200 and roll on the two rails 200.

The two motors 106 are arranged between the erection frame 103B and the two axles 104. Each of the two motors 106 is formed in a substantially cylindrical shape extending in the left-right direction. Each motor 106 is a prime mover that converts electric power into rotational force, and includes a stator and a rotor (not shown) inside the housing 110. Each housing 110 is made of iron, for example, and is formed in a substantially cylindrical shape extending in the left-right direction. In the first embodiment, as an example, the gap X1 between the motor 106 and the erection frame 103B is set to about 13 mm, and the gap X2 between the motor 106 and the axle 104 is set to about 16 mm (see FIG. 3). ..

A joint box 120 containing a joint (not shown) is fixed to the right side of the front motor 106 and the left side of the rear motor 106. That is, the rear electric motor 106 is provided in a posture in which the front electric motor 106 is inverted in the left-right direction. An output shaft (not shown) extending from the rotor of each motor 106 is connected to a joint, and the joint is connected to a gear train (not shown) housed in the gearbox 130. Each gear train is connected to an axle 104.

The outputs (rotational forces) of the pair of motors 106 are transmitted to the pair of axles 104 via joints and gear trains, respectively. The front motor 106 rotates the front wheels 105 around the axis, and the rear motor 106 rotates the rear wheels 105 around the axis. As a result, the bogie 102 (railroad vehicle 100) can be driven along the pair of rails 200. Since the two motors 106 have substantially the same structure, the front motor 106 will be described below.

The motor 106 employs a self-ventilation cooling system that cools the rotor and the like by taking in outside air into the housing 110. An intake duct (not shown) provided with an intake port for taking in outside air is attached to the upper side of the housing 110. As shown in FIGS. 2 and 3, a plurality of exhaust ports 111 for flowing in from the intake port and discharging the air that has cooled the rotor and the like are formed on the lower outer peripheral surface of the housing 110.

Specifically, the plurality of exhaust ports 111 are opened in a strip-shaped plate 112 formed in a substantially annular shape along the outer peripheral surface of the housing 110. The plurality of exhaust ports 111 are arranged on the strip-shaped plate 112 on the lower side at predetermined intervals in the circumferential direction. Each exhaust port 111 is an elongated hole extending obliquely with respect to the width direction of the strip-shaped plate 112 (see FIG. 2). Although not shown, an opening extending in the circumferential direction is formed below the horizontal line passing through the center of the housing 110, and the strip-shaped plate 112 is arranged so as to cover the opening, and is provided by a plurality of bolts B1. It is fixed to the housing 110.

Further, as shown in FIGS. 1 and 3, an introduction nozzle 113 for introducing compressed air when performing air blowing work is provided on the left end surface (opposite side of the output shaft (load side)) of the housing 110. It is provided. The introduction nozzle 113 is arranged above the substantially circular end face of the housing 110 when viewed from the side surface, and projects to the left.

[Air-blown dust collector]
Next, the air-blown dust collector 1 will be described. As shown in FIG. 1, the air-blown dust collector 1 includes a dust collector hood 5 and a dust collector 9. The dust collecting hood 5 is attached to the motor 106 in order to suck the dust removed by blowing air into the motor 106 from the exhaust port 111 of the motor 106 together with the air. The dust collector 9 is a suction source for applying a negative pressure to the inside of the electric motor 106 via the dust collector hood 5.

<Dust collection hood>
As shown in FIGS. 3 and 4, the dust collecting hood 5 includes a hood main body 10, a connecting portion 20, and a holding portion 30. The hood body 10 is used in a state of being arranged corresponding to the exhaust port 111 of the electric motor 106. The connecting portion 20 and the holding portion 30 are provided on the hood body 10.

(Hood body)
The hood body 10 is made of sheet metal, for example, and is formed in a hollow box shape. A substantially semicircular recess 11 is formed in the upper portion of the hood body 10 in a recessed state when viewed from the side surface. The recess 11 is curved so as to have substantially the same diameter as the outer diameter of the motor 106 (housing 110). Further, in the lower part of the hood body 10, a substantially trapezoidal (funnel-shaped) convex portion 12 extending downward from both front and rear sides toward the center when viewed from the side surface is formed. As shown in FIG. 3, a main body opening 10A smaller than the outer shape thereof is formed on the left side surface of the hood main body 10, and the main body opening 10A is closed by the lid body 13. The lid body 13 is detachably fixed to the hood body 10 by a plurality of mounting screws B2.

The hood main body 10 has a suction port 14 for taking in dust-containing air inside, and a discharge port 15 for discharging the dust-containing air taken in from the suction port 14. The suction port 14 is a substantially rectangular opening formed on the upper end surface of the recess 11 and long in the front-rear direction. The suction port 14 is formed along the curvature of the recess 11 (see FIG. 1). That is, the edge portion forming the suction port 14 of the hood body 10 has a curved shape along the outer peripheral surface of the electric motor 106. The discharge port 15 is a substantially circular opening formed on the lower end surface of the convex portion 12. The upstream end of the duct hose 9A is connected to the discharge port 15 (see FIG. 3).

(Connection part)
As shown in FIGS. 3 to 5, the connecting portion 20 includes a pair of attachment / detachment handles 21, a pair of support cylinder portions 22, and a pair of suction portions 23. The pair of attachment / detachment handles 21, the pair of support cylinders 22, and the pair of suction portions 23 are provided on both front and rear sides of the hood body 10 with the discharge port 15 interposed therebetween (see FIG. 3). Since the pair of attachment / detachment handles 21 and the like have a symmetrical structure in the front-rear direction, one (mainly rearward) attachment / detachment handle 21 and the like will be described below.

The detachable handle 21 includes a handle shaft 21A and a handle grip 21B. The handle shaft 21A is formed in a rod shape having a circular cross section. The handle shaft 21A is supported by the hood body 10 in a posture extending along a normal line orthogonal to a tangent line passing through a contact point on the recess 11. The upper part and the middle part of the handle shaft 21A are arranged inside the hood body 10, and the lower part of the handle shaft 21A is exposed from the hood body 10 (see FIG. 5). A male screw is formed on the outer peripheral surface of the handle shaft 21A except for a portion exposed from the hood body 10. The handle grip 21B is fixed to the lower end of the handle shaft 21A. The handle grip 21B extends from the handle shaft 21A on both sides in the radial direction.

As shown in FIG. 5, the support cylinder portion 22 is formed in a substantially cylindrical shape, and a female screw is formed on the inner peripheral surface of the support cylinder portion 22. The support cylinder portion 22 is arranged inside the hood main body 10 in an inclined posture at the same angle as the handle shaft 21A. The upper end of the support cylinder 22 is fixed to the inside of the hood body 10 via the mounting plate 24. The handle shaft 21A described above is provided so as to penetrate the support cylinder portion 22 and the mounting plate 24, and the male screw of the handle shaft 21A meshes with the female screw of the support cylinder portion 22. That is, the support cylinder portion 22 rotatably supports the handle shaft 21A around the shaft by the screw action. The detachable handle 21 is rotated in the forward and reverse directions around the axis so as to move forward and backward in the normal direction (vertical direction).

A double nut 25 is tightened on the upper portion of the handle shaft 21A penetrating the mounting plate 24 with a washer W sandwiched between them. A bracket 26 is fixed to the upper end of the handle shaft 21A that penetrates the double nut 25.

The suction unit 23 includes a magnet holder 27 and a magnet 28 housed therein. The magnet holder 27 is arranged on the upper surface of the bracket 26 and is attached by a knob bolt B3 screwed in from below. The magnet holder 27 is attached to the bracket 26 with some play (rattling). The magnet holder 27 is exposed to the outside of the hood body 10 from the suction port 14. The magnet 28 is a permanent magnet having a strong magnetic force such as a neodymium magnet, and is fixed inside the magnet holder 27. The upper end surface of the magnet 28 is arranged on substantially the same plane as the upper end surface of the magnet holder 27.

(Holding part)
As shown in FIGS. 3 to 5, the holding portion 30 includes a pair of holding arms 31, a pair of mounting boxes 32, a pair of coil springs 33, and a pair of operating levers 34. A pair of holding arms 31, a pair of mounting boxes 32, a pair of coil springs 33, and a pair of operating levers 34 are provided on both front and rear surfaces of the hood body 10, respectively. Since the pair of holding arms 31 and the like have a symmetrical structure in the front-rear direction, one (rear) holding arm 31 and the like will be described below.

As shown in FIGS. 4 and 5, the holding arm 31 is, for example, a metal plate-shaped member extending in the vertical direction. The holding arm 31 includes a curved plate 31A and a support plate 31B. The curved plate 31A and the support plate 31B are connected to a rotating shaft 31C extending in the left-right direction. The left and right ends of the rotating shaft 31C are rotatably supported by bearing holes (not shown) of the hood body 10. That is, the holding arm 31 is rotatably provided about the rotation shaft 31C.

The curved plate 31A (holding arm 31) is formed so as to extend upward (outwardly) from the upper end portion (rotating shaft 31C) of the suction port 14 of the hood main body 10 and is exposed above the hood main body 10. The curved plate 31A is curved in a bow shape toward the center of curvature (inside) of the recess 11 of the hood body 10. That is, the curved plate 31A has a shape curved along the outer peripheral surface of the electric motor 106. A rubber plate 31D is fixed to the inside of the tip (upper inner surface) of the curved plate 31A (see FIG. 5).

As shown in FIGS. 5 and 6, the support plate 31B is formed so as to extend linearly from the rotating shaft 31C toward the inside of the hood body 10. The support plate 31B is formed by welding a double-layered metal plate PL.

As shown in FIG. 6, a spring receiving portion 35, an outer connecting hole 36A, and an inner connecting hole 36B are formed in the lower portion of the support plate 31B. The spring receiving portion 35 is formed so as to be recessed from the outside to the inside of the support plate 31B. The outer connecting hole 36A is open to the outer plate PL, and the inner connecting hole 36B is open to the inner plate PL. The inner connecting hole 36B is formed larger than the outer connecting hole 36A. The outer connecting hole 36A and the inner connecting hole 36B are formed at positions where they overlap each other below the spring receiving portion 35. The center of the inner connecting hole 36B is slightly upwardly offset from the center of the outer connecting hole 36A. The support plate 31B is provided with a rectangular relief hole 37 for preventing interference with the bolt B1 that fixes the strip-shaped plate 112 of the motor 106 (see also FIG. 4). The relief hole 37 is formed above the spring receiving portion 35. Further, end face openings 16 are formed on both front and rear end surfaces of the hood body 10 at positions corresponding to the spring receiving portion 35, the outer connecting hole 36A, and the like.

The mounting box 32 is fixed to the side surface of the hood body 10 so as to cover the end face opening 16. The mounting box 32 includes a first box 40, a second box 41, and a mounting lid 42.

The first box 40 is fixed to the side surface of the hood body 10, and the second box 41 is fixed to the first box 40. The first spring storage portion 40A corresponding to the spring receiving portion 35 opens in the upper part of the first box 40, and the second spring storage portion 41A corresponding to the first spring storage portion 40A opens in the upper part of the second box 41. doing. The first and second spring accommodating portions 40A and 41A have substantially the same opening area as the spring receiving portion 35. A protrusion passage hole 40B corresponding to the outer connecting hole 36A is opened in the lower part of the first box 40, and a protrusion storage portion 41B corresponding to the protrusion passage hole 40B is opened in the lower part of the second box 41. The protrusion passage hole 40B is formed in a rectangular shape that is long in the left-right direction (see also FIG. 4). The protrusion accommodating portion 41B has a sufficiently wider opening area than the protrusion passage hole 40B. The mounting lid 42 is fixed to the outer end surface of the second box 41 and closes the second spring accommodating portion 41A and the protrusion accommodating portion 41B. At the lower part of the mounting lid 42, a substantially circular sliding hole 42A is opened on the same axis as the protrusion passage hole 40B.

The coil spring 33 is a so-called compression spring. The outer end of the coil spring 33 is housed in the first and second spring accommodating portions 40A and 41A of the mounting box 32, and the outer end surface of the coil spring 33 is in contact with the inner surface of the mounting lid 42 of the mounting box 32. The inner end portion of the coil spring 33 is housed in the spring receiving portion 35 of the holding arm 31, and the inner end surface of the coil spring 33 is in contact with the inner surface of the spring receiving portion 35. That is, the coil spring 33 is erected between the mounting box 32 and the holding arm 31. Further, the coil spring 33 urges the holding arm 31 inward with the mounting lid 42 of the mounting box 32 as a pedestal.

As shown in FIGS. 4 to 6, the operating lever 34 includes a lever shaft 34A and a lever grip 34B.

The lever shaft 34A is formed in a rod shape having a circular cross section. The lever shaft 34A is inserted into the sliding hole 42A, the protrusion storage portion 41B, the protrusion passage hole 40B, the end face opening 16, the outer connecting hole 36A and the inner connecting hole 36B, and is a mounting box that extends substantially horizontally in the front-rear direction. It is supported by 32 etc. (see FIG. 6). That is, the lever shaft 34A penetrates the mounting box 32, the hood body 10, and the holding arm 31 (support plate 31B). The outer end (rear portion) of the lever shaft 34A is exposed from the mounting box 32.

As shown in FIGS. 4 and 6, the lever shaft 34A has a pair of protrusions 34C extending radially outward so as to be separated from each other. The pair of protrusions 34C are arranged inside the mounting box 32. The protrusion accommodating portion 41B is formed in a size that allows rotation of the pair of protrusions 34C around an axis. Further, the protrusion passage hole 40B is formed in a shape and size that allows the passage of the pair of protrusions 34C in a substantially horizontal posture and restricts the passage of the pair of protrusions 34C in other postures. There is. Further, the sliding hole 42A is formed in a shape and size that allows the lever shaft 34A to slide, but restricts the passage of the pair of protrusions 34C.

As shown in FIG. 6, the tip end portion (front end portion) of the lever shaft 34A penetrates the holding arm 31 (support plate 31B). A substantially annular dish member 43 is fitted into the tip of the lever shaft 34A. The countersunk member 43 is formed to have a size that allows it to pass through the outer connecting hole 36A of the support plate 31B and cannot pass through the inner connecting hole 36B. The countersunk member 43 is arranged inside the outer connecting hole 36A, and is attached to the lever shaft 34A by screwing the bolt B4 into the nut N fixed to the front end surface of the lever shaft 34A.

As shown in FIG. 5, the lever grip 34B is fixed to the outer end portion (rear end portion) of the lever shaft 34A exposed from the mounting box 32. The lever grip 34B extends from the lever shaft 34A on both sides in the radial direction.

<Dust collector>
Next, the dust collector 9 will be briefly described. As shown in FIG. 1, the dust collector 9 is connected to the dust collector hood 5 by a flexible (elastically deformable) duct hose 9A. The dust collector 9 includes a fan for generating suction force, a filter for removing dust from dust-containing air, and a dust box for collecting the removed dust (none of which are shown). Further, the dust collector 9 is provided with an inverter (not shown), and the suction force by the fan can be changed by adjusting the inverter (not shown).

[Air blowing work]
Next, the air blowing work will be described.

As shown by the alternate long and short dash line in FIGS. 5 and 6, in the initial state before the start of the air blowing operation, the support plate 31B of the holding arm 31 is pushed into the hood body 10 by the coil spring 33. Therefore, the curved plate 31A of the holding arm 31 is in a posture of extending diagonally upward from the rotating shaft 31C toward the outside. That is, the pair of holding arms 31 are rotated to the "retracted position P1" which is widened upward from the hood main body 10 (see the alternate long and short dash line in FIG. 5). In the initial state, the pair of protrusions 34C of the operation lever 34 penetrate the protrusion passage hole 40B of the mounting box 32 and enter the inside of the hood body 10 (see the alternate long and short dash line in FIG. 6). Further, in the initial state, the double nut 25 abuts on the mounting plate 24 via the washer W, and the attachment / detachment handle 21 cannot rotate in the direction of twisting back.

Next, an example of the procedure of the air blowing work will be described. First, the operator arranges the dust collecting hood 5 under the exhaust port 111 of the electric motor 106. The operator lifts the dust collecting hood 5 toward the motor 106, and brings the recess 11 of the hood body 10 into close contact with the outer peripheral surface of the housing 110 of the motor 106 (see FIGS. 3 and 4). The hood body 10 is temporarily fixed to the housing 110 by the magnetic attraction of the two magnets 28 while covering the exhaust port 111 (strip plate 112) of the electric motor 106. The suction port 14 of the hood body 10 is arranged so as to correspond to the exhaust port 111. In this state, the magnet 28 is slightly separated from the outer peripheral surface of the housing 110 (a gap of about 1 mm). Further, the magnet 28 (adsorption portion 23) is provided at a position avoiding the bolt B1 for fixing the strip-shaped plate 112 of the electric motor 106.

Subsequently, the operator grips the handle grip 21B and rotates the handle shaft 21A in the screwing direction. When the detachable handle 21 moves upward, the magnet 28 in the magnet holder 27 is magnetically attracted in contact with the housing 110 (strip plate 112) (see FIG. 5). In this state, the hood body 10 is attached to the motor 106 so as to cover the strip-shaped plate 112 (exhaust port 111), and the edge of the suction port 14 opened in the hood body 10 is in close contact with the outer peripheral surface of the motor 106 ( (See FIG. 3). The magnet 28 is arranged so as to be attracted to the strip 112 at a position avoiding the bolt B1.

Next, as shown in FIGS. 5 and 6, the operator grips the lever grip 34B and pulls the lever shaft 34A to the outside of the hood body 10 against the urging force of the coil spring 33. Then, the support plate 31B of the holding arm 31 rotates outward about the rotating shaft 31C while compressing the coil spring 33, and the curved plate 31A of the holding arm 31 rotates inward about the rotating shaft 31C. The pair of holding arms 31 are in a state in which the rubber plate 31D is brought into close contact with the outer peripheral surface of the housing 110 and rotated to the "holding position P2" holding the motor 106 (see the solid line in FIG. 5). That is, the pair of holding arms 31 face each other with the motor 106 interposed therebetween.

Further, as shown in FIG. 6, in the process in which the operating lever 34 is pulled and the holding arm 31 rotates from the retracted position P1 to the holding position P2, the lever shaft 34A and the countersunk member 43 are inside the inner connecting hole 36B. Moves relatively from the bottom to the top. Since the inner connecting hole 36B is formed larger than the outer connecting hole 36A, the lever shaft 34A and the countersunk member 43 can move smoothly without being twisted by the connecting holes 36A and 36B. Further, as shown by a solid line in FIG. 6, the pair of protrusions 34C of the lever shaft 34A pass through the end face opening 16 and the protrusion passage hole 40B and are arranged in the protrusion storage portion 41B. The operator pulls the operation lever 34 and rotates it around the axis to bring the pair of protrusions 34C into an inclined posture or a substantially vertical posture. Here, when the operator releases the lever grip 34B, the holding arm 31 is urged by the coil spring 33 and tries to return to the initial state (retracted position P1). However, since the pair of protrusions 34C interfere with the edge of the protrusion passage hole 40B, the holding arm 31 is fixed at the holding position P2 against the urging force of the coil spring 33.

As described above, the connecting portion 20 is connected below (one) the center of the motor 106, and the holding portion 30 is in contact with above (the other) above the center of the motor 106 (see FIG. 5). As a result, the dust collecting hood 5 can be securely attached to the motor 106.

Next, the operator connects a hose (not shown) extending from a compressed air supply source (air compressor or the like) to the introduction nozzle 113 of the motor 106. Further, the operator closes the intake port (intake duct) of the electric motor 106 with a plate or the like so that the compressed air supplied from the introduction nozzle 113 does not leak. The hose connection work to the introduction nozzle 113 and the air intake port closing work may be performed before the dust collecting hood 5 is attached to the motor 106.

Subsequently, the operator lifts the carriage 102 using a hydraulic jack or the like to lift the wheels 105, and then slowly rotates the motor 106 (about 1 to 2 rpm). Next, the operator operates the dust collector 9 and applies a negative pressure to the inside of the hood body 10 via the duct hose 9A. Then, the operator drives the supply source of the compressed air and supplies the compressed air from the introduction nozzle 113 to the inside of the electric motor 106. The supply pressure of compressed air is set to about 5 kPa.

The compressed air supplied to the inside of the electric motor 106 blows off the dust adhering to the inner peripheral surface of the housing 110, the rotor, and the like. Air containing dust (dust-containing air) flows into the inside of the hood body 10 from the exhaust port 111 of the housing 110 through the suction port 14 (see the arrow in FIG. 5). The dust-containing air flows from the inside of the hood main body 10 into the inside of the dust collector 9 through the discharge port 15 and the duct hose 9A. Then, the dust-containing air is separated into dust and air by passing through the filter of the dust collector 9, and the clean air from which the dust has been removed is exhausted to the outside. The dust separated from the dust-containing air is accumulated in the dust box of the dust collector 9 and is periodically collected.

After the air blowing operation is completed, the compressed air supply source, the electric motor 106, and the electric motor 106 are stopped in the reverse procedure of the above. Further, the holding arm 31 is rotated from the holding position P2 to the retracting position P1, the attachment / detachment handle 21 is rotated in the direction of twisting back, the magnet 28 is pulled away from the electric motor 106, and the dust collecting hood 5 is removed from the electric motor 106.

In the dust collecting hood 5 according to the first embodiment described above, the connecting portion 20 is connected to the motor 106 by the magnet 28 to attach the hood body 10 to the motor 106 and separate the magnet 28 from the motor 106. The hood body 10 is configured to be dismounted from the motor 106. Further, the holding portion 30 is configured to come into contact with the outer peripheral surface of the motor 106 by rotating inward (one direction) and to be separated from the outer peripheral surface of the motor 106 by rotating outward (other direction). According to this configuration, the hood body 10 can be appropriately attached to the motor 106 by connecting the connecting portion 20 to the motor 106 and bringing the holding portion 30 into contact with the outer peripheral surface of the motor 106. By separating the connecting portion 20 from the motor 106 and separating the holding portion 30 from the outer peripheral surface of the motor 106, the hood body 10 can be removed from the motor 106. As a result, the dust collecting hood 5 can be appropriately and easily attached to and detached from the electric motor 106.

Further, according to the dust collecting hood 5 according to the first embodiment, since the pair of holding arms 31 sandwich the dust collecting hood 5 so as to hold the electric motor 106, the dust collecting hood 5 can be maintained in a state of being attached to the electric motor 106. Further, since the holding arm 31 (curved plate 31A) is curved, the cylindrical electric motor 106 can be firmly held. Further, since the pair of holding arms 31 are formed in a substantially plate shape and extend upward (outward) of the hood body 10, they can enter a narrow space around the motor 106 and sandwich the motor 106. be able to.

Further, according to the dust collecting hood 5 according to the first embodiment, since the edge portion of the suction port 14 is curved along the outer peripheral surface of the motor 106, the edge portion of the suction port 14 is formed on the outer peripheral surface of the motor 106. Can be brought into close contact. As a result, the suction port 14 of the hood body 10 is arranged to face the exhaust port 111 of the motor 106, so that the dust-containing air flowing out from the exhaust port 111 can be appropriately guided to the inside of the hood body 10 and the dust-containing air can be appropriately guided. Leakage can be suppressed.

Further, according to the dust collecting hood 5 according to the first embodiment, the motor 106 can be sandwiched from both sides (upper and lower) with the center of the motor 106 sandwiched between the connecting portion 20 and the holding portion 30. As a result, the dust collecting hood 5 can be securely attached to the motor 106.

[Second Embodiment]
Next, the air-blown dust collector 2 including the dust collecting hood 6 according to the second embodiment will be described with reference to FIGS. 7, 8, 9A and 9B. FIG. 7 is a side view showing the dust collecting hood 6, the electric motor 107, and the like. FIG. 8 is a side view showing a part of the dust collecting hood 6 and the electric motor 107 and the like. FIG. 9A is a side view showing the holding arm 71 with a cover. FIG. 9B is a front view showing the holding arm 71 with a cover. In the following description, the same components as those of the dust collecting hood 5 and the like according to the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

<Motor>
First, the electric motor 107 of the railroad vehicle 100, which is the target of the air blowing work, will be described. Two electric motors 107 are mounted on the bogie 102, but since the two electric motors 107 have substantially the same structure, the front electric motor 107 will be described below. Further, in the second embodiment, as an example, the gap X3 between the motor 107 and the erection frame 103B is set to about 60 mm, and the gap X4 between the motor 107 and the axle 104 is set to about 20 mm (see FIG. 7). ..

As shown in FIG. 7, the strip-shaped plate 114 having a plurality of exhaust ports 111 opened is arranged from the lower end portion of the housing 110 to both front and rear surfaces, and is fixed to the housing 110 by a plurality of bolts B1. The strip 114 is formed in a substantially semicircular shape, and both ends thereof extend slightly above the horizontal line passing through the center of the housing 110. The exhaust port 111 is formed not only on the lower side of the strip-shaped plate 114 but also on the side surface.

Further, an introduction nozzle 115 is provided on the left end surface of the housing 110 (the side opposite to the output shaft (load side)). The introduction nozzle 115 is arranged at the rear portion (on the horizontal line passing through the center of the housing 110) of the substantially circular end face of the housing 110 when viewed from the side surface, and projects to the left.

<Dust collection hood>
As shown in FIGS. 7 and 8, the dust collecting hood 6 includes a hood main body 50, a connecting portion 60, and a holding portion 70.

(Hood body)
The hood body 50 is made of sheet metal, for example, and is formed in a hollow box shape. A concave portion 11 is formed in the upper portion of the hood main body 50, and a substantially trapezoidal (funnel-shaped) convex portion 52 is formed in the rear end portion of the lower portion of the hood main body 50. The suction port 14 is formed on the upper end surface of the recess 11 along the curvature of the recess 11. The upstream end of the duct hose 9A is connected to the discharge port 15 opened on the lower end surface of the convex portion 52. Further, the upper portions of both front and rear surfaces of the hood body 50 form slopes inclined so as to approach each other from the lower side to the upper side. An arm opening 53 is formed on the slope on the rear side of the hood body 50.

By the way, since the introduction nozzle 115 is provided at the rear portion of the end surface of the electric motor 107, when the air blowing operation is performed, the nozzle 115 opens at the rear surface of the electric motor 107 as compared with the exhaust port 111 which opens at the front surface or the lower surface of the electric motor 107. A large amount of dust-containing air will be exhausted from the exhaust port 111 (see the arrow in FIG. 8). Therefore, as shown in FIG. 8, in order to efficiently suck the dust-containing air introduced into the internal space of the hood body 50, a partition plate 54 for partitioning the internal space in the front-rear direction is provided inside the hood body 50. Has been done. The partition plate 54 is formed by, for example, a sheet metal extending from the rear upper portion of the suction port 14 to the vicinity of the discharge port 15. Specifically, the partition plate 54 has a first flow path 55A located on the introduction nozzle 115 side and a second flow path 55B located on the side opposite to the introduction nozzle 115 in the internal space of the hood body 50. It is divided into.

The partition plate 54 includes a guide portion 54A, an inclined portion 54B, and a vertical portion 54C. The guide portion 54A is exposed to the outside of the hood body 50 from the suction port 14, and is bent so as to avoid the bolt B1 fixing the strip-shaped plate 114. The inclined portion 54B extends diagonally downward from the lower end portion of the guide portion 54A toward the vicinity of the convex portion 52. The vertical portion 54C extends substantially vertically downward from the lower end portion of the inclined portion 54B to the vicinity of the discharge port 15. The partition plate 54 is provided at a position deviated from the center of the discharge port 15 so that the flow rate of the first flow path 55A is larger than that of the second flow path 55B. The partition plate 54 is provided at a position where the cross-sectional area of the first flow path 55A is larger than the cross-sectional area of the second flow path 55B at the convex portion 52 (discharge port 15).

(Connection part)
As shown in FIG. 8, the connecting portion 60 includes a detachable handle 21, a support cylinder portion 22, and a pair of suction portions 23.

The support cylinder portion 22 is fixed at substantially the center of the lower surface of the hood body 50 in the front-rear direction and projects downward. The detachable handle 21 (handle shaft 21A) is supported by the support cylinder portion 22 in a posture extending substantially vertically (fitted by screwing). A double nut 25 is fastened to the upper part of the handle shaft 21A penetrating the lower wall of the hood body 50 with a washer W sandwiched between them. A bracket 66 is fixed to the upper end of the handle shaft 21A that penetrates the double nut 25.

The bracket 66 is formed in a plate shape that is long in the front-rear direction, and supports two magnet holders 27 (a pair of suction portions 23). Each of the two magnet holders 27 is attached to the bracket 66 by a knob bolt B3 (with some play). Two magnets 28 are fixed to the two magnet holders 27.

As described above, since a large amount of dust-containing air is exhausted from the exhaust port 111 opened on the rear surface of the electric motor 107 during the air blowing operation, the rear holding arm 31 (hereinafter, also referred to as “covered holding arm 71”). Has a structure that takes in dust-containing air.

(Holding part)
As shown in FIGS. 7 and 8, the holding portion 70 includes a holding arm 71 with a cover, a holding arm 31, a pair of mounting boxes 32, a pair of coil springs 33, and a pair of operating levers 34. I'm out. The holding portion 70 differs from the holding portion 30 of the first embodiment in that the pair of coil springs 33 are arranged below the pair of operating levers 34, but these basic structures and actions are the first. Since it is substantially the same as the holding unit 30 of the embodiment, the description thereof will be omitted. Further, since the holding portion 70 is substantially the same as the holding portion 30 of the first embodiment except for the holding arm 71 with a cover, the holding arm 71 with a cover will be mainly described below.

As shown in FIGS. 8, 9A and 9B, the holding arm 71 with a cover includes an arm body 72 and an arm cover 73.

The arm body 72 is, for example, a plate-shaped member made of metal and extending in the vertical direction. The arm body 72 includes a curved plate 72A and a support plate 72B. A pair of rotating bosses 72C project from the side surface of the connecting portion between the curved plate 72A and the support plate 72B. The pair of rotary bosses 72C are rotatably supported in bearing holes (not shown) of the hood body 50.

The curved plate 72A is formed so as to extend upward (outward) from the arm opening 53 of the hood body 50. The curved plate 72A has a shape that is exposed above the hood body 50 and is curved along the outer peripheral surface (strip plate 114) of the electric motor 107.

The support plate 72B is formed in a state in which it extends diagonally from the lower end of the curved plate 72A along the slope of the arm opening 53 of the hood body 50, and then bends and extends substantially vertically downward. The support plate 72B is formed by welding a double-layered metal plate PL. A spring receiving portion 35, an outer connecting hole 36A, and an inner connecting hole 36B are formed in the lower portion of the support plate 72B.

The curved plate 72A is formed with an upper opening 74U corresponding to the exhaust port 111, and the support plate 72B is formed with a lower opening 74D continuous with the upper opening 74U. The upper opening 74U and the lower opening 74D are integrally long substantially rectangular openings in the vertical direction. The lower opening 74D is formed on an inclined surface of the support plate 72B above the connecting holes 36A and 36B. A sealing material (not shown) is fixed to the edge of the upper opening 74U of the curved plate 72A so that the dust-containing air exhausted from the exhaust port 111 does not leak to the outside.

The arm cover 73 is, for example, a hollow member formed of a sheet metal in a substantially square tubular shape extending in the vertical direction. The arm cover 73 is curved with substantially the same curvature as the curved plate 72A, and is provided from the upper end of the curved plate 72A to the lower portion (bent portion) of the support plate 72B. The arm cover 73 is fixed to the outside of the arm body 72 and has a hollow portion that covers the openings 74U and 74D and communicates with the inside of the hood body 50. An outside air introduction port 75 for taking in outside air into the inside of the arm cover 73 is opened on the upper end surface (tip surface) of the arm cover 73. The lower end of the arm cover 73 is housed in the arm opening 53 without a gap.

As shown in FIG. 7, the front holding arm 31 is substantially the same as the holding arm 31 according to the first embodiment, but the rubber plate 31D fixed to the tip portion is omitted. A sealing material (not shown) is fixed along the outer shape of the curved plate 31A of the holding arm 31 according to the second embodiment so that the dust-containing air exhausted from the exhaust port 111 does not leak to the outside, and is curved. Approximately the entire plate 31A is in close contact with the outer peripheral surface (strip plate 114) of the electric motor 107.

[Air blowing work]
Next, the air blowing work will be described. The air blowing operation using the air blowing dust collecting device 2 is performed in substantially the same procedure as the air blowing work using the air blowing dust collecting device 1 according to the first embodiment. That is, as shown in FIGS. 7 and 8, the operator attracts the two magnets 28 of the connecting portion 60 to the motor 107, and the holding arm 71 with the cover and the holding arm 31 of the holding portion 70 are attached to the hood body 50. It is rotated from the retracted position P1 to the holding position P2 around the bearing hole (not shown) of the above. Then, the dust collecting hood 6 is attached to the motor 107. In the process of attaching the dust collecting hood 6 to the motor 107, the guide portion 54A of the partition plate 54 comes into contact with the bolt B1 fixing the strip plate 114, so that the dust collecting hood 6 with respect to the motor 107 is placed in an appropriate position. They are arranged (see FIG. 8).

Next, the operator connects a hose (not shown) to the introduction nozzle 115 of the motor 107, and closes the intake port of the motor 107 with a plate or the like. The operator slowly rotates the electric motor 107 with the wheels 105 floating to drive the dust collector 9 and the source of compressed air. The supply pressure of compressed air is set to about 5 kPa.

As shown by a thin arrow in FIG. 8, a large amount of dust-containing air exhausted from the exhaust port 111 opened on the rear surface of the motor 107 by compressed air passes through the upper opening 74U and flows into the inside of the arm cover 73. .. At this time, the outside air (see the thick arrow in FIG. 8) that has flowed into the inside of the arm cover 73 from the outside air introduction port 75 due to the suction force of the dust collector 9 merges with the dust-containing air that has passed through the upper opening 74U. Here, if the flow velocity of the outside air flowing in from the outside air introduction port 75 is slow, the dust-containing air may flow back and leak from the outside air introduction port 75 to pollute the working environment. Therefore, in the dust collecting hood 6 according to the second embodiment, the opening area of the outside air introduction port 75 is set to 1368 square millimeters (36 mm × 38 mm), and the flow velocity of the outside air flowing in from the outside air introduction port 75 is 15 to 20 m /. It is set in the range of s. The flow velocity of the outside air can be adjusted by the suction force of the dust collector 9.

The dust-containing air that has merged with the outside air inside the arm cover 73 passes through the lower opening 74D and flows into the first flow path 55A inside the hood body 50 (see the thick arrow in FIG. 8). On the other hand, the dust-containing air exhausted from the exhaust port 111 opened on the front surface or the lower surface of the electric motor 107 passes through the suction port 14 and flows into the second flow path 55B inside the hood body 50 (thin in FIG. 8). See arrow). The dust-containing air flowing through the first flow path 55A and the dust-containing air flowing through the second flow path 55B merge near the discharge port 15 and flow into the inside of the dust collector 9 through the duct hose 9A. Then, the dust collector 9 exhausts clean air in which dust is separated from the dust-containing air to the outside.

According to the dust collecting hood 6 according to the second embodiment described above, the dust-containing air that has passed through the upper opening 74U of the holding arm 71 with a cover and has flowed into the inside of the cover is introduced from the outside air introduction port 75 to the arm cover 73. It can be combined with the outside air introduced inside the building and pushed downstream. As a result, the suction force of the dust-containing air is improved, so that the dust-containing air can be efficiently sucked.

Further, in the dust collecting hood 6 according to the second embodiment, the partition plate 54 is a first flow path through which the air introduced from the openings 74U and 74D and the outside air introduction port 75 flows through the internal space of the hood body 50. The structure is divided into 55A and a second flow path 55B through which air introduced from the suction port 14 excluding the openings 74U and 74D and the outside air introduction port 75 flows. Further, at the discharge port 15, the cross-sectional area of the first flow path 55A is set to be larger than the cross-sectional area of the second flow path 55B. Then, the dust-containing air exhausted from the exhaust port 111 opened on the rear surface of the electric motor 107 on the introduction nozzle 115 side passes through the first flow path 55A, and the dust-containing air exhausted from the other exhaust ports 111 It was decided to pass through the second flow path 55B. According to this configuration, since the first flow path 55A can flow more dust-containing air than the second flow path 55B, a large amount of dust-containing air introduced from the upper opening 74U can efficiently flow. can. Further, since the partition plate 54 is formed with the inclined portion 54B, the pressure loss of the dust-containing air flowing through the first flow path 55A can be reduced.

In the dust collecting hood 6 according to the second embodiment, the arm cover 73 is provided on the rear holding arm 31 (holding arm 71 with a cover), but the present invention is not limited to this. The arm cover 73 may be provided on the front holding arm 31, or may be provided on one or both of the pair of holding arms 31 of the dust collecting hood 5 according to the first embodiment. Further, the partition plate 54 of the dust collecting hood 6 may be provided inside the dust collecting hood 5 according to the first embodiment.

[Third Embodiment]
Next, the air-blown dust collector 3 including the dust collecting hood 7 according to the third embodiment will be described with reference to FIGS. 10A and 10B. FIG. 10A is a perspective view showing a dust collecting hood 7, a railroad vehicle 100, and the like. FIG. 10B is a perspective view showing the dust collecting hood 7, the electric motor 106, and the like.
In the following description, the same reference numerals will be given to the same configurations as those of the dust collecting hoods 5, 6 and the like according to the first or second embodiment, and the description thereof will be omitted.

<Dust collection hood>
The dust collecting hood 7 includes a hood main body 50, a connecting portion 60, a first base 80, a second base 81, and a connecting rotating portion 82. The hood body 50 has a suction port 14 arranged corresponding to the exhaust port 111. The connection portion 60 is provided in the hood main body 50, and has a function of attaching the hood main body 50 to the electric motor 106 by connecting to the electric motor 106 and disengaging the hood main body 50 from the electric motor 106 by separating from the electric motor 106. ing. In the dust collecting hood 7, the holding portion 70 provided in the dust collecting hood 6 according to the second embodiment is omitted.

The first base 80 is erected between two rails 200 on which the wheels 105 rotated by the electric motor 106 roll. The first base 80 has a function of moving along the rail 200. The first base 80 includes a pair of first sliders 80A slidably engaged along a pair of rails 200, and a pair of shafts 80B erected between the pair of first sliders 80A.

The second base 81 is provided on the first base 80 and has a function of moving in the left-right direction (the erection direction of the first base 80). The second base 81 is provided so as to straddle the pair of shafts 80B, and is slidably engaged along the pair of shafts 80B. A pair of handles 81A for sliding the second base 81 are provided on both the left and right sides of the second base 81. Further, the second base 81 is provided with a position fixing mechanism 83 that regulates the movement thereof and fixes the position with respect to the first base 80. The position fixing mechanism 83 has a structure (not shown) for tightening and releasing the shaft 80B by reciprocating the position fixing lever 83A provided on the second base 81.

The connection rotating portion 82 is connected to the second base 81 and the hood body 50. The connection rotating portion 82 includes a fixing plate 82A fixed to the rear portion of the second base 81, and a rotating plate 82B connected to the tip end portion of the fixing plate 82A via a rotating shaft 82C. The hood body 50 is fixed to the tip of the rotating plate 82B. The rotating plate 82B is supported by the fixing plate 82A so as to be rotatable in the vertical direction about the rotating shaft 82C. The connection rotating portion 82 (rotating plate 82B) rotates upward (in one direction) to bring the hood body 50 into contact with the outer peripheral surface of the motor 106, and rotates downward (in the other direction) to bring the hood body 50 into contact with the outer peripheral surface of the motor 106. It has a function of separating 50 from the outer peripheral surface of the electric motor 106.

[Air blowing work]
Next, the air blowing work will be briefly described. It should be noted that the description of the procedure substantially the same as that of the air blowing operation using the air blowing dust collectors 1 and 2 according to the first or second embodiment will be omitted.

The operator moves the first base 80 along the rail 200 and adjusts the position of the hood body 50 with respect to the electric motor 106 in the front-rear direction. Further, the operator moves the second base 81 along the shaft 80B and adjusts the position of the hood body 50 with respect to the motor 106 in the left-right direction. Then, the operator operates the position fixing lever 83A to fix the position of the hood body 50 in the left-right direction by the action of the position fixing mechanism 83.

Next, the operator rotates the rotating plate 82B and the hood body 50 upward about the rotating shaft 82C, and then attracts the two magnets 28 of the connecting portion 60 to the electric motor 106. As a result, the dust collecting hood 7 can be attached to the motor 106.

The subsequent procedure is the same as the air blowing operation using the dust collecting hoods 5 and 6 according to the first and second embodiments, the dust inside the electric motor 106 is removed by air blowing, and the dust-containing air is the dust collecting hood. It is sucked and collected by the dust collector 9 via 7. After the air blowing operation is completed, the supply and suction of compressed air are stopped, the detachable handle 21 is rotated in the direction of twisting back, the magnet 28 is pulled away from the electric motor 106, and the dust collecting hood 7 is removed from the electric motor 106.

According to the dust collecting hood 7 according to the third embodiment described above, the hood body 50 can be moved on a flat surface by the first base 80 and the second base 81. Further, by rotating the hood body 50 by the connection rotating portion 82, the hood body 50 can be brought into contact with or separated from the outer peripheral surface of the motor 106. As a result, the hood body 50 (suction port 14) can be easily aligned with the exhaust port 111 of the motor 106.

Further, according to the dust collecting hood 7 according to the third embodiment, the position fixing mechanism 83 can regulate the movement of the hood main body 50 in the erection direction. As a result, the hood body 50 can be stably rotated while the hood body 50 is fixed at an arbitrary position in the erection direction.

In the dust collecting hoods 5, 6 and 7 according to the first to third embodiments, the connecting portions 20 and 60 include a magnet 28, and the hood bodies 10 and 50 are motorized by the magnetic attraction force of the magnet 28. Although attached to 106, 107, the present invention is not limited to this. The connecting portions 20 and 60 may include, in addition to / instead of the magnet 28, a pad having an adhesive layer capable of repeating sticking and peeling to the outer peripheral surfaces of the motors 106 and 107, for example. A suction cup that can be attracted to the outer peripheral surfaces of the motors 106 and 107 may be included (neither is shown). In addition, a protrusion (not shown) extending in the radial direction is provided at the tip of the handle shaft 21A, and the handle shaft 21A is rotated around the shaft after the protrusion is inserted into the exhaust port 111 of the motors 106 and 107. Therefore, it may be configured to be engaged with the edge portion of the exhaust port 111. Further, in addition, a hook portion (not shown) that expands in the radial direction and bends in the radial direction is provided at the tip of the handle shaft 21A, and the hook portion is press-fitted into the exhaust port 111 of the motors 106 and 107. It may be configured to be engaged with the edge portion of the exhaust port 111. Further, instead of this hook portion, a ball that can appear and disappear from the surface of the handle shaft 21A may be provided. Further, in addition, external hooks (not shown) are provided on the outer peripheral surfaces of the motors 106 and 107, and engaging portions (not shown) that are hooked on the external hooks are provided on the hood bodies 10 and 50 as connecting portions 20 and 60. You may.

Further, in the dust collecting hoods 5, 6 and 7 according to the first to third embodiments, the attachment / detachment handles 21 of the connecting portions 20 and 60 rotate around the axis and move forward and backward by the screw action. The invention is not limited to this. For example, the detachable handle 21 may be configured to slide linearly or may be configured to rotate about a certain fulcrum (neither is shown).

Further, in the dust collecting hoods 5, 6 and 7 according to the first to third embodiments, the connecting portions 20, 60 (magnets 28) are arranged inside the hood bodies 10 and 50, but the present invention is not limited to this. It may be provided on the outside of the hood bodies 10 and 50.

In the dust collecting hoods 5 and 6 according to the first and second embodiments, a pair of holding arms 31 (holding arms 71 with a cover) are arranged so as to face each other with the motors 106 and 107 interposed therebetween. Is not limited to this. For example, the dust collecting hoods 5 and 6 may have one holding arm 31 (holding arm 71 with a cover) extending so as to cover from the side surface to the upper surface of the electric motors 106 and 107 (not shown). ).

Further, in the dust collecting hoods 5 and 6 according to the first and second embodiments, the support plates 31B and 72B of the holding arm 31 (holding arm 71 with a cover) are formed of two plate materials PL, but the present invention Is not limited to this. The support plates 31B and 72B may be formed of a single plate material PL. Further, the curved plates 31A and 72A of the holding arm 31 (holding arm 71 with a cover) are formed of one plate material PL, but the present invention is not limited to this, and the curved plates 31A and 72A may be formed of two stacked plate material PLs.

Further, since the exhaust ports 111 of the motors 106 and 107 are mainly opened to the lower side of the housing 110, the dust collecting hoods 5, 6 and 7 according to the first to third embodiments are under the motors 106 and 107. Although mounted on the side, the invention is not limited to this. If the exhaust port 111 is open on the upper side of the housing 110, the dust collecting hoods 5, 6 and 7 are attached on the upper side of the motors 106 and 107. In this case, the connecting portions 20 and 60 are connected above the center of the motors 106 and 107, and the holding portions 30 and 70 come into contact below the center of the motors 106 and 107. That is, the dust collecting hoods 5, 6 and 7 may be attached to the motors 106 and 107 so as to correspond to the positions of the exhaust ports 111.

Further, the dust collecting hoods 5, 6 and 7 according to the first to third embodiments have been used for the air blowing work of the railroad vehicle 100, but the vehicle to be the target of the air blowing work is limited to the railroad car 100. It's not something. For example, it may be used for air blowing work of an electric motor such as an electric vehicle.

The technique of the present invention can be suitably used for cleaning the inside of an electric motor of a railway vehicle or the like.

5,6,7 Dust collection hood 10,50 Hood body 15 Discharge port 20,60 Connection part 30,70 Holding part 31 Holding arm 54 Partition plate 55A 1st flow path 55B 2nd flow path 71 Holding arm with cover 73 Arm cover 74U Upper opening (opening)
74D Lower opening (opening)
75 Outside air inlet 80 1st base 81 2nd base 82 Connection rotating part 83 Position fixing mechanism 106,107 Motor

Claims (9)

A dust collecting hood attached to the motor to suck the dust removed by blowing air into the motor together with the air from the exhaust port of the motor.
A hood body having a suction port arranged corresponding to the exhaust port, and
A connection portion provided on the hood body, which is connected to the motor to attach the hood body to the motor, and is separated from the motor to disengage the hood body from the motor.
It is characterized in that it is provided on the hood body and is provided with a holding portion that contacts the outer surface of the motor by rotating in one direction and separates from the outer surface of the motor by rotating in the other direction. Dust collection hood. The dust collecting hood according to claim 1, wherein the holding portion includes a pair of holding arms extending outward from the suction port of the hood body and facing each other with the electric motor interposed therebetween. The motor is formed in a cylindrical shape.
The holding portion includes a holding arm formed so as to extend outward from the suction port of the hood body.
The dust collecting hood according to claim 1, wherein the holding arm has a shape curved along the outer peripheral surface of the electric motor. An opening corresponding to the exhaust port is formed in the holding arm.
A hollow cover that covers the opening and communicates with the inside of the hood body is fixed to the holding arm.
The dust collecting hood according to claim 2 or 3, wherein an outside air introduction port for taking in outside air into the inside of the cover is opened on the front end surface of the cover. The hood body
A discharge port that discharges air containing dust taken in from the suction port, and a discharge port.
The air introduced from the opening and the first flow path through which the air introduced from the outside air introduction port flows, and the air introduced from the suction port excluding the opening and the outside air introduction port flow through the internal space of the hood body. Includes a second flow path and a partition plate for partitioning.
The collection according to claim 4, wherein the partition plate is provided at a position deviated from the center of the discharge port so that the flow rate of the first flow path is larger than that of the second flow path. Dust hood. The motor is formed in a cylindrical shape.
The exhaust port is formed on the outer peripheral surface of the motor.
The dust collecting hood according to any one of claims 1 to 5, wherein the edge portion of the hood body forming the suction port has a curved shape along the outer peripheral surface of the electric motor. The connection is connected to one side of the center of the motor.
The dust collecting hood according to any one of claims 1 to 6, wherein the holding portion is in contact with the other side of the center of the electric motor. A dust collecting hood attached to the motor to suck the dust removed by blowing air into the motor together with the air from the exhaust port of the motor.
A hood body having a suction port arranged corresponding to the exhaust port, and
A connection portion provided on the hood body, which is connected to the motor to attach the hood body to the motor, and is separated from the motor to disengage the hood body from the motor.
A first base erected between two rails on which wheels rotated by the motor roll and move along the rails, and
A second base provided on the first base and moving in the erection direction of the first base, and
The second base is connected to the hood body, and the hood body is brought into contact with the outer surface of the motor by rotating in one direction, and the hood body is brought into contact with the outer surface of the motor by rotating in the other direction. A dust collecting hood characterized by having a connecting rotating portion for separating. The dust collecting hood according to claim 8, wherein the second base is provided with a position fixing mechanism for restricting its movement and fixing its position with respect to the first base.

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