JP4597148B2 - Crawler type traveling device - Google Patents

Description

  The present invention relates to a crawler type traveling device.

  2. Description of the Related Art Conventionally, as a crawler type traveling device, there is a semi-crawler type crawler type traveling device that is attached in place of a wheel of a traveling vehicle such as a tractor. The support is provided with a swing frame supported so as to be swingable about a horizontal axis, and the swing frame supports a front and rear idler and a plurality of wheels disposed between the front and rear idlers. A driving wheel disposed on the upper side of the wheel and supported on the vehicle body so as to be rotatable about an axis in the left-right direction. The driving wheel is rotated by the axle of the traveling vehicle, whereby the driving wheel, There is a configuration in which a crawler belt wound around an idler and a roller is circulated (see Patent Document 1).

The crawler type traveling device is provided with swing regulating means for regulating the swing of the swing frame beyond a predetermined range.
The conventional swing restricting means is provided with a swing plate disposed so that the plate surface faces in the left-right direction on the front side of the swing axis of the swing frame so as to be integrally swingable. A pair of upper and lower stopper members are fixed to each other, and a roller member disposed between the upper and lower stopper members is attached to a pair of front and rear bracket members fixed to the frame support, and is disposed on the inner side in the left-right direction of the roller member. The restriction plate is fixed to the upper and lower stopper members.

In the swing restricting means configured as described above, the swing frame swings and the roller member comes into contact with one of the upper and lower stopper members, so that the swing of the swing frame is restricted and the roller member swings. Engagement with the plate restricts the inward movement of the swing frame in the left-right direction. Engagement of the roller member with the restricting plate restricts the outward movement of the swing frame in the left-right direction. .
JP-A-11-321729

In the conventional crawler type traveling device, the swing restricting means has a complicated structure with a large number of parts, and the constituent parts are large, and the movement of the swing frame is liable to accumulate soil between the upper and lower stopper members. There is a problem that there is a risk of obstructing.
In addition, there is a concern that soil enters the roller member and the movement of the roller member becomes dull.
SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a crawler type traveling device that includes a swing restricting means that has a structure that reduces the number of parts, simplifies the structure, and prevents soil accumulation.

The technical means taken by the present invention in order to solve the technical problem described above includes a swing frame that is supported on a frame support fixed to the vehicle body side of a traveling vehicle so as to be swingable about a lateral axis. The swing frame supports the front and rear idlers and a plurality of wheels disposed between the front and rear idlers, and is disposed on the upper side of the wheels and is rotatable about the left and right axial center on the vehicle body side. The crawler belt wound around the drive wheels, the front and rear idlers and the wheels is circulated and rotated by rotating the drive wheels by the axle of the traveling vehicle. In the crawler type traveling device,
A swing plate disposed on the outer side in the left-right direction of the frame support and having a plate surface facing in the left-right direction is provided on the swing frame so as to be swingable integrally with the swing support plate. A swing restricting body having an engaging portion inserted into the swing restricting opening is fixed to the frame support, and when the swing frame swings, the edge in the swing direction of the swing restricting opening is It is characterized in that the swinging of the swinging frame is restricted by contacting the engaging part.

  In addition, the swing restricting body is provided with an inward restricting portion that restricts the motion of the swing frame inward in the left-right direction by engaging with the swing plate, and is disposed on the outer side in the left-right direction of the swing plate. In addition, it is preferable to provide an outer restricting member that is fixedly attached to the engaging portion of the swing restricting body and that engages with the swing plate to restrict the movement of the swing frame in the left-right direction. .

  According to the present invention, the swing restricting means for restricting the swing of the swing frame forms the swing restricting opening in the swing plate that is swingable integrally with the swing frame, and in the swing restricting opening. In addition, since the engaging portion of the fixed swing restricting body is inserted into the frame support body, the swing restricting means can have a simple structure and a structure that does not easily accumulate soil.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
In FIG. 2, reference numeral 1 denotes a semi-crawler tractor 1 (traveling vehicle) in which a semi-crawler type crawler type traveling device 2 is independently attached to the left and right instead of the rear wheels of a four-wheel tractor that can be driven by a pair of left and right front and rear wheels. is there.
The vehicle body 1A of the tractor 1 is mainly configured by attaching a power transmission case 4 to the rear portion of the engine 3 via a flywheel housing. The power transmission case 4 is formed by connecting a transmission case to the rear portion of the clutch housing, for example. 3 includes a power transmission mechanism that transmits power from 3 to an axle 5 (rear axle) that drives the crawler type traveling device 2.

The rear axle 5 protrudes outward in the left-right direction from left and right axle cases 6 (rear axle cases) provided on the left and right sides of the rear portion of the vehicle body 1A, and is freely rotatable about the left-right axis about the rear axle case 6. A mounting flange 7 is provided on the outer ends of the left and right rear axles 5 in the left-right direction.
As shown in FIGS. 1 to 9, each of the left and right crawler type traveling devices 2 swings around a frame support 8 fixed to the vehicle body 1 </ b> A side of the tractor 1, and the frame support 8 around a horizontal axis. A swing frame 9 that is freely supported, front and rear idlers 10 and 11 provided before and after the swing frame 9, and a plurality of (this embodiment) disposed between the front and rear idlers 10 and 11 of the swing frame 9 The three wheels 12 in the form, a drive wheel 13 (sprocket) that is disposed on the upper side of these wheels 12 and is supported on the vehicle body 1A so as to be rotatable about a left-right axis, and a drive wheel 13, crawler belt 14 wound around front and rear idlers 10 and 11 and roller 12.

The drive wheel 13 is bolted to a mounting flange 7 on the outer end side of the rear axle 5 and is supported by the rear axle case 6 together with the rear axle 5 so as to be rotatable around a lateral axis.
Engagement teeth 15 are provided on the outer peripheral side of the drive wheel 13 at a predetermined interval in the circumferential direction. On the other hand, the crawler belt 14 has engagement holes 16 into which the engagement teeth 15 are inserted and engaged. The crawler belt 14 is formed so as to circulate and rotate when the drive wheels 13 are rotationally driven by the rear axle 5 of the tractor 1.
The frame support 8 is disposed on both left and right sides of the front and rear mounting plates 17 so as to sandwich the mounting portion 6 a provided on the rear axle case 6, and the front and rear mounting plates 17. It consists of a pair of left and right support plates 18 provided so as to extend downward from the lower end side, a connecting plate 19 that connects the upper end sides of the left and right support plates 18, and a cylinder that penetrates the left and right support plates 18. Mainly composed of the bearing member 20.

The front and rear mounting plates 17, the left and right support plates 18 and the connecting plate 19 are welded to each other, and the bearing member 20 is welded to the left and right support plates 18.
The front and rear mounting plates 17 are fixedly attached to the rear axle case 6 by bolts that pass through the mounting plate 17 and are screwed into the screw holes of the rear axle case 6, and the left and right support plates 18 connect the left and right support plates 18. It is fixedly attached to the rear axle case 6 by bolts that pass through and are screwed into the screw holes of the rear axle case 6.
Further, the bearing member 20 has a left-right axial center, and the axial center of the bearing member 20 is located below the axial center of the rear axle 5 and at the same position as the axial center of the rear axle 5 in the front-rear direction. It is provided to do.

Further, the support plate 18 on the outer side in the left-right direction has an extending portion 21 that extends to the front side of the support plate 18 on the inner side in the left-right direction.
Further, the support plates 18 on the outside of the left and right frame supports 8 are connected by a connecting body 22 shown in FIG. 9, and this connecting body 22 has a mounting plate 23 that is bolted to the lower surface side of the vehicle body 1A. I have.
The swing frame 9 includes a main frame 26 having front and rear idler support portions 24 and 25 that support the front and rear idlers 10 and 11, and a swing disposed in the left and right direction above the middle portion of the main frame 26 in the front and rear direction. A shaft 27, a front connecting member 28 that connects the swing shaft 27 and the front idler support 24, a rear connection member 29 that connects the swing shaft 27 and the rear idler support 25, and front and rear connecting members 28 , 29 and an intermediate connecting member 30 that connects the side of the main frame 26 in the front-rear direction.

In the swing frame 9 having the above-described configuration, between the front and rear connecting members 28 and 29 and the main frame 26 (in this embodiment, the front and rear connecting members 28 and 29 and the main frame 26 are intermediately connected. A portion surrounded by the member 30 is formed in an opening shape in the left-right direction, and is formed in a structure in which soil does not easily accumulate on the main frame 26.
The main frame 26 includes a main plate 31 that is formed of a thick band plate material and is disposed so that the plate thickness direction is the vertical direction and the longitudinal direction of the band is the front-rear direction, and a front idler is disposed on the front side of the main plate 31. A support portion 24 is provided, and a rear idler support portion 25 is provided on the rear side of the main plate 31.

The main plate 31 is disposed below the drive wheel 13, and on the lower surface side of the main plate 31, a wheel mounting bracket 32 is mounted and fixed on the front end side, the rear end side, and the front-rear direction center side. A wheel 12 is attached to 32 so as to be rotatable about a left-right axis.
Further, a crawler detachment preventing member 33 that prevents the crawler belt 14 from detaching is provided on the lower surface of the main plate 31.
The front idler support portion 24 includes a tension applying device 34 that applies tension to the crawler belt 14 and a front support bracket 35 that supports the front idler 10.

The tension applying device 34 includes an outer cylinder 36 fixed to the front upper surface side of the main plate 31, a rear wall 37 fixed to the rear end of the outer cylinder 36 and standing on the main plate 31, and an outer cylinder. 36 is attached to a front wall 39 fixed to the front end side of the inner cylinder 38 and the rear wall 37 so as to be movable forward and backward and to be fixed in position. A spring receiver 40 and a spring 41 interposed between the spring receiver 40 and the front wall 39.
The front support bracket 35 that supports the front idler 10 is provided on the front surface of the front wall 39 of the tension applying device 34, and the front idler 10 is axially centered in the left-right direction on the mounting member 42 that is bolted to the front side of the front support bracket 35. The front idler 10 is pressed against the crawler belt 14 by the urging force of the spring 41 so that tension is applied to the crawler belt 14 and the spring receiver 40 is moved forward and backward. Thus, the tension of the crawler belt 14 can be adjusted.

The rear wall 37 extends from the main plate 31 inward in the left-right direction.
The rear idler support portion 25 includes a mounting plate 43 formed in an L shape in a side view from a lower wall 43a fixed on the main plate 31 and a vertical wall 43b extending upward from the rear end of the lower wall 43a. The rear idler 11 is attached to a mounting member 45 having a rear support bracket 44 fixed to the rear surface of the vertical wall 43b of the mounting plate 43 and bolted to the rear surface side of the rear support bracket 44 so as to be rotatable about the left and right axis. It has been.
The mounting plate 43 extends from the main plate 31 inward in the left-right direction.

The front and rear connecting members 28 and 29 are made of a pipe material, and in particular in the present embodiment, are made of square pipes and are arranged on the inner side in the left-right direction of the drive wheel 13.
The front connecting member 28 has one end side in the longitudinal direction fixed to the left and right outer end sides of the swing shaft 27, and the other end side in the longitudinal direction fixed to the extending portion of the rear wall 37 of the front idler support portion 24. The front shaft is inclined downward from the swing shaft 27 toward the front idler support portion 24.
Further, a reinforcing member 46 welded to the main plate 31, the rear wall 37, and the front connecting member 28 is provided on the outer side on the lower end side of the front connecting member 28.

The rear connecting member 29 has one end side in the longitudinal direction fixed to the left and right outer end sides of the swing shaft 27, and the other end side in the longitudinal direction is connected to the extending portion of the vertical wall 43 b of the mounting plate 43 of the rear idler support portion 25. It is fixed, and is inclined downward from the swing shaft 27 toward the rear idler support portion 25.
Further, a reinforcing member 47 welded to the mounting plate 43 and the rear connecting member 29 is provided on both the left and right sides of the lower end side of the rear connecting member 29.
The intermediate connecting member 30 is formed in a bottomed rectangular tube shape having an axis in the vertical direction, the upper end side is fixed to the rear end side lower surface of the front connecting member 28 and the front end side lower surface of the rear connecting member 29, and the lower end side is the main plate. 31 is fixed to the inner side surface in the left-right direction.

In the present embodiment, the intermediate connecting member 30 is formed by two members, an outer member 48 on the outer side in the left-right direction and an inner member 49 on the inner side in the left-right direction.
The outer member 48 extends to the inner side in the left-right direction from both the front and rear sides of the outer wall 30a and constitutes the front and rear portions of the intermediate connecting member 30. The front and rear walls 30b, 30c are formed in a U shape in plan view, and the upper end of the outer member 48 is fixed to the lower surface of the rear end side of the front connecting member 28 and the lower surface of the front end side of the rear connecting member 29. The lower end side is fixed to the inner side surface of the main plate 31 in the left-right direction.

The inner member 49 includes an inner side wall 30d that constitutes the inner side portion of the intermediate connecting member 30 in the left-right direction, and a bottom wall 30e that extends outward in the left-right direction from the lower end of the inner side wall 30d and constitutes the bottom portion of the intermediate connecting member 30. And is formed in an L shape.
A reinforcing member 50 formed in an L shape from a vertical wall 50 a fixed to the outer surface of the intermediate connecting member 30 and a lower wall 50 b fixed to the upper surface of the main plate 31 is provided at the lower portion of the intermediate connecting member 30. It has been.
The swing shaft 27 includes a shaft main body 51 formed of a cylindrical body having a left-right axial center, an outer closing plate 52 that closes the left-right outer end of the shaft main body 51, and a left-right inner end of the shaft main body 51. And an inner closing member 53 which is inserted and fixed.

A screw hole 54 having a horizontal axis is formed through the inner closing member 53.
The swing shaft 27 is inserted into the bearing member 20 of the frame support 8 concentrically from the left and right outer ends of the frame support member 8 so that the portion extending from the middle in the left and right direction to the inner end is inserted into the bearing member 20 in the left and right direction. The swing frame 9 is supported by the frame support 8 so as to be swingable about the swing shaft 27.
Further, the bolt 55 is threaded into the screw hole 54 of the inner closing member 53 through the retaining plate 56 disposed on the inner end side in the left-right direction of the bearing member 20, so that the bearing member 20 of the swing shaft 27 is engaged. It is designed to keep it from coming off.

In the swing frame 9 having the above-described structure, a truss structure is formed by connecting the swing shaft 27 and the front and rear idler support portions 24 and 25 of the main frame 26 by the front and rear connecting members 28 and 29 formed of square pipes. Ensuring strength is achieved.
This crawler type traveling device 2 is provided with a rocking restricting means for restricting rocking of the rocking frame 9 around a rocking shaft 27 within a predetermined range.
The swing restricting means includes a swing plate 57 that can swing integrally with the swing frame 9, a swing restricting opening 58 formed in the swing plate 57, and an edge of the swing restricting opening 58. A swing restricting body 59 that contacts the swinging plates 57 a and 58 b and restricts the swing of the swing plate 57 beyond a predetermined range, and an outer restricting member 60 attached to the swing restricting body 59 are provided.

The swing plate 57 is disposed on the outer side of the support plate 18 on the outer side in the left-right direction of the frame support 8 so that the plate surface faces in the left-right direction (facing in the left-right direction).
A shaft insertion hole 61 is formed on the rear side of the swing plate 57. The swing shaft 27 is inserted into the shaft insertion hole 61 from the inner side in the left-right direction, and the swing plate 57 is connected to the front connecting member 28. And the upper and lower inner surfaces of the rear connecting member 29 (on the swinging shaft 27 side) and the upper end of the inner member 49 of the intermediate connecting member 30 are in contact with each other. The connecting member 28, the rear connecting member 29, and the inner member 49 of the intermediate connecting member 30 are fixed by welding.

The front end side of the swing plate 57 and the front lower end side of the front connecting member 28 are connected by a reinforcing member 62 made of an angle material.
Further, the swing plate 57 is in contact with the left and right outer ends of the bearing member 20 of the frame support 8.
The front side of the swing plate 57 protrudes forward from the swing shaft 27, and the front side is configured to swing up and down around the swing shaft 27. The opening 58 is formed at a position corresponding to the front side of the swing shaft 27 and the side of the extending portion 21 of the support plate 18 on the outer side in the left-right direction of the frame support 8.

The swing restricting body 59 is welded and fixed to the outer surface of the extending portion 21 of the support plate 18 on the outer side in the left and right direction of the frame support 8 and to the position corresponding to the swing restricting opening 58 in the left and right direction. At the same time, the swing restricting body 59 is formed with an engaging portion 63 inserted into the swing restricting opening 58.
Therefore, when the swing frame 9 swings around the swing shaft 27, the front side of the swing plate 57 swings up and down integrally, and the upper and lower edges 58a and 58b of the swing restriction opening 58 (swing direction). Of the swing frame 9 is restricted to a predetermined range or more by contacting the engaging portion 63.

The engaging portion 63 is formed with a pair of front and rear screw holes 64 formed from the outer side in the left-right direction.
Further, the swing restricting body 59 is provided with an inner restricting portion 65 that is located on both front and rear sides of the engaging portion 63 and faces the inner surface of the swing plate 57 in the left-right direction. When 65 is engaged with the swing plate 57, the inward movement of the swing frame 9 is restricted.
The outer regulating member 60 is formed of a plate material so that the plate thickness direction coincides with the left and right direction outward of the engaging portion 63 of the swing restricting body 59 and the outer side of the swing plate 57 in the left and right direction. The outer restricting member 60 is fixedly attached to the swing restricting body 59 by a bolt 66 that is disposed and passes through the outer restricting member 60 and is screwed into the screw hole 64 of the engaging portion 63.

The outer restricting member 60 is formed to have a longer front and rear width than the swing restricting opening 58, and both the front and rear sides of the outer restricting member 60 are engaged with the swing plate 57, so The outward movement is restricted.
The swing restricting means having the above structure has a structure having a function of restricting the swing of the swing frame 9 beyond a predetermined range and a function of restricting the movement of the swing frame 9 in the left-right direction. It can be formed simply.
Further, there is little possibility that soil will accumulate in the swing restricting opening 58, and it is extremely unlikely that the swing of the swing frame 9 is hindered by the soil accumulated in the swing restricting means.

Further, the front and rear connecting members 28 and 29 are inclined, and the swinging plate 57 is fixed to the inner side surfaces of the front and rear connecting members 28 and 29. There is little accumulation of soil on the connecting members 28 and 29.
Further, the swing restricting body 59 is formed with a through hole 67 penetratingly formed in the vertical direction so that soil is not easily accumulated on the swing restricting body 59.
Since the soil does not easily collect in the swing restricting means and the periphery thereof, there is an effect that the car can be easily washed.

  In addition, a vehicle other than the tractor 1 may be used as a traveling vehicle in which the crawler traveling device 2 according to the present invention is adopted, and the crawler traveling device 2 may be provided instead of the front wheels.

It is a side view of a crawler type traveling device. It is a side view of a tractor equipped with a crawler type traveling device. It is a side view of a frame support and a swing frame. It is a rear view of a crawler type traveling device. It is a side view of a rocking | fluctuation frame. It is a partially broken plan view of a swing frame. (A) is a partial cross-sectional rear view of the swing frame, and (b) is a cross-section taken along line AA in FIG. (A) is a side view of a frame support body, (b) is a partial cross-sectional rear view of a frame support body. (A) is a B arrow figure of FIG. 3, (b) is a side surface enlarged view of a rocking | fluctuation control means, (c) is a plane sectional view of a rocking | fluctuation control means.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling vehicle 1A Car body 5 Axle 8 Frame support body 9 Swing frame 10 Front idler 11 Rear idler 12 Rolling wheel 13 Drive wheel 14 Crawler belt 26 Main frame 27 Swing shaft 28 Front connection member 29 Rear connection member 57 Swing plate 58 Oscillation regulating opening 58a Edge portion 58b Edge portion 59 Oscillation regulating body 60 Outer regulating member 63 Engaging portion 65 Inward regulating portion

Claims (3)

A frame support (8) fixed to the vehicle body (1A) side of the traveling vehicle (1) is provided with a swing frame (9) supported so as to be swingable about a left-right axis, and this swing frame ( 9) supports the front and rear idlers (10, 11) and the plurality of wheels (12) disposed between the front and rear idlers (10, 11), and is disposed above the wheels (12). A drive wheel (13) is provided on the vehicle body (1A) side so as to be rotatable about an axis in the left-right direction, and the drive wheel (13) is rotationally driven by the axle (5) of the traveling vehicle (1). In the crawler type traveling device configured such that the crawler belt (14) wound around the driving wheel (13), the front and rear idlers (10, 11), and the wheel (12) is circulated.
A swing plate (57) disposed on the outer side in the left-right direction of the frame support (8) and having a plate surface facing the left-right direction is provided on the swing frame (9) so as to be integrally swingable. ) Is formed with a swing restricting opening (58), and the swing restricting body (59) having an engaging portion (63) inserted into the swing restricting opening (58) is attached to the frame support (8). When the swing frame (9) swings, the edges (58a, 58b) in the swing direction of the swing restricting opening (58) come into contact with the engaging portion (63). The swing frame (9) is configured to be controlled to swing ,
The swing restricting body (59) is provided with an inner restricting portion (65) for restricting the inward movement of the swing frame (9) by engaging with the swing plate (57). The movable plate (57) is disposed on the outer side in the left-right direction and is fixedly attached to the engaging portion (63) of the swing restricting body (59) so as to swing when engaged with the swing plate (57). A crawler type traveling device provided with an outer regulating member (60) for regulating movement of the frame (9) outward in the left-right direction . The swing frame (9) includes a main frame (26) that supports the front and rear idlers (10, 11) and the wheels (12), an upper side of the main frame (26) , and a lower side of the axle (5). And a swing shaft (27) supported by the frame support (8) so as to be rotatable about the left and right axes, and from the swing shaft (27) toward the front of the main frame (26). A front connecting member (28) which is inclined forward and connects the swing shaft (27) and the front portion of the main frame (26), and from the swing shaft (27) to the rear portion of the main frame (26). And a rear connecting member (29) that is inclined downward and connects the swing shaft (27) and the rear portion of the main frame (26),
The swing plate (57) is disposed below the axle (5) and on the inner side in the left-right direction of the drive wheel (13), and on the inner side surface in the left-right direction on the upper side of the front and rear connecting members (28, 29). The crawler type traveling device according to claim 1, wherein the crawler type traveling device is fixed. The swing plate (57) extends forward from the swing shaft (27) side, and the front side of the swing plate (57) is connected to the front lower side of the front connecting member (28). The crawler type traveling device according to claim 1 or 2.

Images