JP3467578B2 - Exciter - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to, for example, when generating vibration by a prime mover such as vibration pile driver, to a force exciter that can the be increased or decreased control the vibratory force.

[0002]

2. Description of the Related Art In general, there are two types of vibration generators that constitute a vibration device that vibrates piles and rollers in civil engineering construction work.
There are a piston type that reciprocates the piston violently with hydraulic pressure, and a pendulum that rotates an eccentric weight. Since the present invention is applied to the pendulum type, the conventional pendulum type technique will be mainly described below. In civil engineering work that uses a vibration device, thorough consideration must be given to preventing the occurrence of vibration pollution.However, it is important to control the vibration force of the vibration exciter while operating the vibration device to prevent or reduce vibration pollution. It is very effective. Below, we will explain the reason why vibration control is effective in preventing vibration pollution. "When a pile gripped by a vibrating pile driver suspended by a crane is allowed to penetrate into the ground."
Will be described as an example. FIG. 5 is a chart showing changes in the frequency of the vibration device at the time of starting and stopping the operation, and the horizontal axis is time. Start of operation time t _0, between time t ₁ to reach the rated operating state, frequency rises sharply as shown by arrow c. During the above-mentioned frequency increase, the natural frequency n ₁ of the ground and the natural frequency n ₂ of the crane boom are passed.
However, since the rotation speed increasing period T ₁ at the start of operation is generally short (for example, about 3 seconds), the problem of resonance when the vibration frequency of the vibration device matches the natural frequency can be usually ignored. it can. However, between the time t ₂ of stopping the energization of the motor of the vibration device (not shown) to the time t ₃ when the rotary shaft is stopped is gradually decelerated as indicated by the arrow d while continuing to rotate at a rotational axis of inertia. The number of times reduction period T described above
_{Since 2} is a relatively long time (for example, about 50 seconds), when the natural frequency n ₂ of the crane boom is passed on the way, the crane boom may resonate and be damaged. Further, when passing through the natural frequency n ₁ of the ground, vibration of the ground may cause vibration pollution. The time t
If it is possible to stop the energization of the motor in ₂ and change the rotational phase of the rotary weight of the vibration device to make the exciting force zero, prevent problems related to resonance at the time of operation stop of the vibration device. You can

Next, looking at the amount of energy supplied to the vibrating device, an eccentric weight (not shown) of the vibrating device is used while the rotational speed of the vibrating device increases from the time t ₀ to t ₁ . When speeding up while generating vibration, a large capacity motor and large capacity power supply equipment are required to drive this. In this case, if the eccentric weight of the vibration device is changed to a zero phase to start the operation in a state where the vibration force is zero, and if the vibration force can be exerted after reaching the rated rotation speed,
It is economical because the motor capacity and power supply capacity can be reduced.
This is because after the rated speed is reached, it is not necessary to store further rotational energy in the rotary member, and the operation can be continued by supplementing the energy for compensating for the vibration damping.

In view of the above circumstances, an adjusting technique for increasing / decreasing the oscillating force of the oscillating machine has been developed and is well known. Next, the principle of increasing or decreasing the exciting force of the exciter will be described. FIG. 6 is a view for explaining a known technique of changing an exciting force by a combination of two eccentric weights, and (A) shows two eccentric weights exhibiting maximum exciting force. A schematic diagram showing a state, (B) a schematic diagram showing a state where the exciting force is medium, (C) a schematic diagram showing a state where the exciting force is slightly small, (D) a state where the exciting force is zero It is a schematic diagram showing. Of the two eccentric weights shown in FIG. 6A, 9 is a fixed eccentric weight fixed to the rotating shaft 2B ', and 10 is rotatable relative to the rotating shaft 2C'. It is a movable eccentric weight. In the present invention, the fixed eccentric weight is an eccentric weight that is locked to rotate relative to the rotary shaft, and is a member that rotates together with the rotary shaft, so fixing does not mean stationary. . The relative positions of the two eccentric weights 9 and 10 in FIG. 6A are in a state where the phase difference is zero. Therefore, in the state of FIG. 6 (A), the two eccentric weights 9 and 10 are connected to the gear 4
When the B'and 4C 'are rotated in synchronization with each other, an exciting force is generated. In the state of FIG. 6D, the center of gravity of each of the two eccentric weights 9 and 10 is always the reference line MM (two rotary shafts 2
Since the vertical bisector of the line segment connecting B'and 2C 'is located symmetrically, the vertical excitation force is zero. For convenience of description, a state in which the phase difference between the two eccentric weights is 180 degrees and the total eccentric moment of the two eccentric weights is zero as shown in FIG. 6D is named a reference state. FIG. 6 (B),
Since (C) is an intermediate state between (A) and (D), respectively, a vertical vibration force smaller than in the case of FIG. (A) and larger than that in the case of (D) is generated. And (B)
Since the figure is closer to the state of (A) than that of (C), when the vibration forces are listed in order from (A), (B),
(C) and (D). In FIG. 6 described above, the two rotating shafts 2B ′, 2
Although C'is drawn so as to be synchronously rotated by the synchronous rotary gears 4B 'and 4C', an eccentric weight may be provided on one rotary shaft to simplify the structure.

As is clear from the above-described principle of operation, the increase / decrease control of the exciting force in the pendulum type exciter is basically performed by increasing / decreasing the phase difference between the two types of eccentric weights. When considering the phase difference, the eccentric weight serving as a reference is called a fixed eccentric weight, and the other is called a movable eccentric weight. This designation is a relative one that changes depending on how the reference is taken. Therefore, when discussing the technical scope of the present invention, the fixed eccentric weight and the movable eccentric weight can be replaced. That is, the term "fixed" which is used in the terms "eccentric weight, eccentric weight shaft, eccentric weight gear," etc.

The phase difference between the fixed eccentric weight and the movable eccentric weight can be increased / decreased during the operation of the vibration exciter, and the phase control mechanism forms one set of the assembly so that the maintainability is improved. As the latest technology created in good condition, a configuration as shown in FIG. 7 can be considered. This invention was created by the present inventor and is being applied for by the present application (Japanese Patent Application No.
No. -316378-Vibration control method and vibration control mechanism for a rod-shaped vibration compactor) is an unknown invention. Hereinafter, this is referred to as the invention of the prior application. FIG. 7 is a sectional view of a phase difference control mechanism in one embodiment of the vibration control mechanism according to the invention of the prior application. Reference numeral 25 is a fixed eccentric weight shaft, and 26 is a movable eccentric weight shaft, which is configured in a double tube shape. In this embodiment, the fixed eccentric weight shaft 25 is an outer tube, and the movable eccentric weight shaft 26 is an inner shaft. When carrying out the invention of the prior application, either may be configured as the outer pipe and any may be configured as the inner shaft. The fixed eccentric weight shaft 25 on the outer tube side of the double-tube eccentric weight shaft is supported by the bearing 29 and penetrates the wall of the vibrator casing 21 ′, and is connected to the pipe shaft 33 via the spline 30. They are connected to each other and extend to the outside of the vibrator casing 21 '. The spline 30 may be a square spline or an involute spline, but is not a screw spline but a straight spline. The inner shaft type movable eccentric weight shaft 26 is also connected to the rod 31 via the direct spline 32 and extends to the outside of the vibrator casing 21 '. A right screw 33a is formed on the outer periphery of the tube shaft 33. This is called the right-hand screw tube axis. A left screw 31a is formed on the outer circumference of the rod 31. This is called a left-hand threaded rod.

[0007] provided right internal thread tube 34a having a right-hand thread 34a ₁ of the female screw-shaped screwed into the right external thread 33a of the male screw-type of the right screw tube shaft 33, reciprocates above the right female screw cylinder 34a in the axial direction When driven, the fixed eccentric weight shaft 25 is rotated by the screw action via the right female screw pipe shaft 33. As a result, the phase difference between the movable eccentric weight (not shown) supported by the movable eccentric weight shaft 26 and the fixed eccentric weight (not shown) supported by the fixed eccentric weight shaft 25 changes. However, in this case, if the phase difference between the right female screw cylinder 34a and the movable eccentric weight shaft 26 is not restrained by any means, a pair of eccentric weights (movable eccentric weight and fixed eccentric weight). It is not possible to adjust the phase difference of the weight. In this case, since the phase difference between the pair of eccentric weights is a problem, the fixed eccentric weight and the movable eccentric weight do not have to be caught in terms of movable and fixed, and can be simply used as a code for distinction. You can think. The movable eccentric weight spindle shaft 26 and the right female screw cylinder 34a may be constrained by, for example, a straight spline, but in the present embodiment, a left screw type screwed with a male screw type left screw 31a of the left screw rod 31. Left screw nut 3 which is a nut member having the female screw 34b ₁ of
4b, and the left screw nut 34b and the right female screw cylinder 34a are concentrically and integrally connected to form a cylindrical member 34. The tubular member 34 is a member that rotates together with the eccentric weight shafts 25 and 26 in a screwed state in a screwed state in a steady operation state. It should be noted that the female thread cylinder and the nut are essentially indistinguishable from each other, and they are named so that the images are close to the actual product, and the names of both members are easily understood.

As described above, the cylindrical rotating member 34
Via a so-called reverse screw mechanism (a right screw and a left screw are concentrically arranged) and a fixed eccentric weight shaft 25 and a movable eccentric weight shaft 2.
6, the fixed eccentric weight shaft 25 and the movable eccentric weight shaft 26 are relatively opposite to each other when the tubular rotating member 34 is driven in the axial direction (with reference to the tubular rotating member 34). Since it is rotated in the direction, a phase change of a large angle is generated as compared with the drive stroke of the tubular rotating member 34.
A fluid pressure cylinder means is provided to drive the cylindrical rotating member 34 in the axial direction so as not to prevent the cylindrical rotating member 34 from rotating together with the eccentric weight shafts 25 and 26. In this embodiment, hydraulic cylinder means is provided.
As a result, it is also possible to provide a control device on the hydraulic pipe for remote control.

The member denoted by the reference numeral 27 is a member that also serves as the cylinder body of the hydraulic cylinder means and the casing of the vibration control mechanism, and is attachable to and detachable from the casing 21 'of the vibrating section by a mounting screw 28. Is attached to.
If the vibration control casing and the cylinder are used in common as in the present embodiment, the number of constituent parts is small, the entire device is compact, and the manufacturing cost is low.

Further, if the vibration control section casing is constructed so as to be attachable to and detachable from the vibrating section casing 21 ', inspection and maintenance can be facilitated. This effect is effectively exhibited by spline-connecting the right-hand screw tube shaft 33 and the left-hand screw rod 31 to the eccentric weight shafts 25 and 26, and the assembly of the control mechanism portion can be replaced.

In order to reciprocally drive the cylindrical rotating member 34 in the axial direction, an annular piston 35 is provided, and the cylindrical rotating member 34 is mounted on the inner circumference of the annular piston 35 via a bearing 36. Since the main members of the control mechanism in this embodiment are arranged concentrically with respect to the center line Z as described above, the force balance is good and the operation is smooth. Moreover, since the annular piston 35, the tubular rotating member 34, the right-handed screw shaft 33, and the left-handed screw rod 31 are arranged concentrically, the length of the vibration control mechanism in the axial direction (vertical direction in the figure) is shortened. In addition, when the vibration control casing 27 is removed and inspected, the members located inside the annular piston 35 can be visually observed. The one indicated by reference numeral 37 is the left-hand threaded rod 3.
It is a bearing that supports 1. In the present embodiment (FIG. 7), a fixed eccentric weight shaft 25 and a movable eccentric weight shaft 26, which support a pair of eccentric weights (not shown), are arranged concentrically with the center line Z. The pair of eccentric weights is housed in the vibration unit casing 21 ', but a pair of eccentric weights are arranged concentrically with the center line Z'parallel to the center line Z in the same manner as described above. It is housed in a casing 21 '. Two
Reference numeral 2 is a motor for rotationally driving an eccentric weight shaft (both not shown) supporting the eccentric weight. 16 shown is
A fixed eccentric weight gear fixed to a fixed eccentric weight shaft arranged on the center line Z, and a fixed eccentric weight gear 16 'fixed to a fixed eccentric weight arranged on the center line Z'. Is.

[0012]

The present inventor has achieved the intended purpose at the mass production / practical stage as a result of carrying out the practical application test research of the device according to the invention of the earlier application described above with reference to FIG. It was confirmed that there was room for further improvement in productivity improvement and cost reduction. This is, in essence, a problem relating to the balance between quality / performance and manufacturing cost / economical efficiency. Specifically, taking the embodiment of FIG. 7 as an example, a right-handed tube shaft 33 having a right-handed male thread is formed. It is substantially attempted to accurately configure the cylinder / casing 27 including the left-handed threaded rod 31 formed with a left-handed male thread, the right-handed female thread, the cylindrical rotary member 34 formed with a left-handed female-thread, and the annular piston 35. It is expensive. However, it is a component that should perform the function of generating a thrust direction force while receiving a strong vibration and converting this into a rotational force, so unless it is a highly accurate and proper material, mechanical efficiency is low and it operates smoothly. It is difficult to do, and there is a problem in durability. Therefore, the present invention is the effect of the invention according to the above-mentioned prior application,
"While the exciter is running, you can increase or decrease the exciter force,
Moreover, it is an object of the present invention to provide a technique capable of configuring the phase difference control mechanism with high accuracy and at a low cost, without impairing the function of "maintenance is good and assembly can be exchanged".

[0013]

The basic principle of the present invention created to achieve the above-mentioned object will be briefly described. The "thrust force generating mechanism portion" and the "thrust force generating mechanism part" of a ready-made rotary actuator (commercial item) → "Rotation torque conversion mechanism part" is used and "pressure fluid supply means" is modified. The rotary actuator is a known device that generates reciprocating power by using hydraulic pressure and air pressure, and for example, Fine Roll (trade name) manufactured by Koyo Hydraulic Co., Ltd. is commercially available. This rotary actuator includes a cylindrical body that is a stationary member that is fixedly installed in a driven device, and an output shaft that transmits reciprocating rotary power, and reciprocating driving force is generated in the body. Fluid pressure cylinder means and screw means for converting the generated reciprocating driving force into reciprocating motive force are provided. 8 is a known hydraulic pressure,
It is a longitudinal section showing an example of a rotary actuator which is pneumatic equipment. Reference numeral 40 shown in the figure is a cylindrical body that forms an outer casing of the rotary actuator, and is provided with a mounting screw hole 40a for fixing and installing it on a driven device, and an inner peripheral surface thereof is a right circular cylinder. The planar portion 40c is ground and finished. An annular free piston 41 is slidably fitted in the right cylindrical surface portion 40c on the inner circumference of the cylindrical body 40 and is sealed by an O-ring 44. The O-ring 44 functions as a so-called piston ring (packing for piston). In the present invention, the free piston means a piston to which the piston rod is not fixed. An output shaft 42 is provided so as to penetrate through the annular free piston 41, and the output shaft 42 penetrates through the lid 40e and is slidably sealed by an O-ring 43.
The cylindrical body 40 and the annular free piston 41 are hermetically fitted to each other to form a cylinder mechanism, and also form a right-hand screw pair. That is, a right-handed female thread 40d formed on the inner peripheral surface of the tubular body 40 and a right-handed male thread 4 formed on the outer peripheral surface of the annular free piston 41.
1b is screwed together and lubricated with hydraulic oil or grease. The output shaft 42 and the annular free piston 41 are connected to each other via a screw pair whose twisting direction is different from that of the screw pair. That is, the left internal thread 41a formed on the inner peripheral surface of the annular free piston 41 and the left external thread 42a formed on the outer peripheral surface of the output shaft 42 are screwed together and lubricated with hydraulic oil or grease. Each pressure chamber contacting both end faces of the annular free piston 41 passes through a communication hole formed through the wall of the tubular body 40 and is connected to a hose by a pipe joint fixed to the outer peripheral surface of the tubular body 40. It is connected. When the annular free piston is driven vertically by fluid pressure, the output shaft 42
Is reciprocally rotated by a screw action, and its reciprocating rotation output is used for opening and closing valves, driving rack and pinion, opening and closing circuit breaker, driving handling mechanism, and opening and closing lids and doors.

A communication hole for supplying a pressure fluid, which is a power source, is bored in the cylindrical body 40, and a pipe joint 40b and a hose are connected thereto. However, since the tubular body is a stationary member, there is no particular technical problem with the means for supplying the pressure fluid, and no special device is applied. The present invention utilizes the reciprocating drive generating mechanism of the rotary actuator described above and the mechanism for converting reciprocating power into reciprocating motive power as they are or by processing them at a low working ratio, and modifying the fluid pressure supply mechanism portion at a low working ratio. Then, the cylindrical body that is a stationary member of the rotary actuator is processed and used as a rotating member. In the present invention, the low degree of processing means that the constituent members of the rotary actuator are processed within a range in which the original main function of the constituent members is not lost. Also, regarding the processing method of the rotary actuator,
The finished product shipped from the manufacturer of the rotary actuator may be subjected to additional machining, or the material or semi-finished product of the unfinished product may be processed.

Based on the above-mentioned principle, the invention of claim 1 is
Use a drive motor to rotate in synchronization with the drive motor.
Inner shaft with fixed eccentric weight attached, and
The gear for driving the movable eccentric weight is arranged concentrically with the inner shaft.
In an exciter having a fixed outer tube, said outer tube
A cylinder, which is a rotating member, is concentrically fixed to one end of the
Together with the above-mentioned cylinder free annular piston
Is stored and inserted through the annular free piston described above.
The output shaft is fixed concentrically to one end of the inner shaft.
And (a) the cylinder and the annular free piston are screw pairs.
(B) the annular free piston and the output shaft are connected to each other via
Connected via a screw pair that has a different twist direction from the screw pair of
It is, or, (a ') the cylinder and the annular free piston and screw pairs
While it is bonded via the even, and the output shaft and (b ') above the annular free piston linear spline
It is coupled via an in or, (a ") and the cylinder and the annular free piston linear spray
While being connected via a line, (b ″) the annular free piston and the output shaft are screw pairs.
The cylinder and the output shaft and the shaft have been coupled via the
The relative movement of the mind direction is restrained, the annular pretend
-The piston moves back and forth in the axial direction due to the fluid pressure.
Then, the cylinder and the output shaft reciprocally rotate relative to each other.
The rotating member, which is designed to be
A sleeve that can be rotated relative to the cylinder
And the sleeve is attached to the vibrator
It is fixed to the grayed, due to the aforementioned sleeve and the cylinder
It is characterized in that a swivel joint is formed . According to the invention of claim 1 described above , the "annular frame
For constructing a pressure chamber that applies fluid pressure to the Lee piston
"Rotating cylinder" and "To guide pressure fluid to the pressure chamber
Of the rotating shaft forming the swivel joint of
Being used, the structure is simple and the manufacturing cost is low
It

According to a second aspect of the present invention , a drive motor is provided.
Fixed by rotating the drive motor in synchronization with
Concentric with the inner shaft to which the eccentric weight is attached and the above inner shaft.
The gears for driving the movable eccentric weight are fixed outside
In a vibration exciter having a pipe,
The cylinder, which is the rolling member, is fixed concentrically and
An annular free piston is stored in the cylinder
The output shaft inserted through the annular free piston is
It is concentrically fixed to one end of the inner shaft, and (a) the cylinder and the annular free piston are screw pairs.
(B) the annular free piston and the output shaft are connected to each other via
Connected via a screw pair that has a different twist direction from the screw pair of
It is, or, (a ') the cylinder and the annular free piston and screw pairs
While it is bonded via the even, and the output shaft and (b ') above the annular free piston linear spline
It is coupled via an in or, (a ") and the cylinder and the annular free piston linear spray
While being connected via a line, (b ″) the annular free piston and the output shaft are screw pairs.
The cylinder and the output shaft and the shaft have been coupled via the
Relative movement in the axial direction is restrained, and
-The piston moves back and forth in the axial direction due to the fluid pressure.
Then, the cylinder and the output shaft reciprocally rotate relative to each other.
The cylinder is designed to be
And the output shaft, and these are connected to each other
The screw pair member is a ready-made rotary actuator.
Finished product or semi-finished product or processed material
The cylinder, which is the rotating member, is
A cylindrical body that is a stationary member in a rotary actuator.
At least part of the outer peripheral surface of the
In addition to being used, a sleeve is attached to the rotating surface shape part.
It is fitted out and functions as a swivel joint.
The rotary actuator of the rotary actuator.
Stone and output shaft are either
The ring-shaped free pin of the phase control mechanism of the vibration exciter
It is used as a stone and an output shaft . According to the invention of claim 2 described above , the ready-made product
Mass production of rotary actuators marketed as
Effective use of low price and stable quality
To increase or decrease the eccentric moment of the pendulum type exciter.
The vibrating force can be controlled by.

According to a third aspect of the present invention, there is provided a drive motor.
To rotate in synchronization with the drive motor.
Inner shaft with constant eccentric weight attached, and concentric with the above inner shaft
The gear for driving the movable eccentric weight is fixed to
In an exciter having an outer tube, at one end of the outer tube,
While the cylinder, which is the rotating member, is fixed concentrically,
An annular free piston is stored in the above cylinder.
And the output shaft inserted through the annular free piston
Is fixed concentrically to one end of the inner shaft, and (a) the cylinder and the annular free piston are screw pairs.
(B) the annular free piston and the output shaft are connected to each other via
Connected via a screw pair that has a different twist direction from the screw pair of
It is, or, (a ') the cylinder and the annular free piston and screw pairs
While it is bonded via the even, and the output shaft and (b ') above the annular free piston linear spline
It is coupled via an in or, (a ") and the cylinder and the annular free piston linear spray
While being connected via a line, (b ″) the annular free piston and the output shaft are screw pairs.
The cylinder and the output shaft and the shaft have been coupled via the
The relative movement of the mind direction is restrained, the annular pretend
-The piston moves back and forth in the axial direction due to the fluid pressure.
Then, the cylinder and the output shaft reciprocally rotate relative to each other.
It is designed to be squeezed, and on the inner shaft,
For supplying at least two pressure fluids in the longitudinal direction
A communication hole is formed at one end of the inner shaft
The swivel joint is connected to the above communication hole.
Ri, the output shaft, its the at least two communication holes
Each of the output shafts has a communication hole connected to it.
At least two communicating hole teeth drilled in the
Characterized by communicating with both end faces of the annular free piston
And According to the invention of claim 3 described above , the inner shaft
Communication hole to the output shaft for rotating the outer tube and the outer tube relatively
Is provided, and this communication hole is connected to the swivel joint.
Since the output shaft and the annular free piston are connected,
While rotating together with the cylinder, the annular free pin
It is possible to operate by supplying fluid pressure to both end surfaces of the ton.
I can .

According to a fourth aspect of the present invention, there is provided the above-mentioned invention.
In addition to the constituent features of the invention of item 3,
Force axes, as well as screw pairs that connect them to each other
Completion of a rotary actuator whose components are ready-made products
A member made by processing a finished product, a semi-finished product, or a material
And the cylinder, which is the rotating member, is a rotary
It is installed on a cylindrical body that is a stationary member of the actuator.
The hole for supplying pressure fluid is blocked and the front
The output shaft described above is the output shaft of the rotary actuator.
A communication hole for supplying pressure fluid is drilled .
The annular free piston is the ring of the rotary actuator.
-Shaped free piston as it is or with a low degree of processing
It is characterized by being processed and used .
According to the invention of claim 4 described above , the ready-made
By effectively using the tally actuator,
High-quality, low cost phase control mechanism part of vibrator
Can be configured to .

[0019]

[0020]

[0021]

[0022]

[0023]

[0024]

[0025]

[0026]

[0027]

[0028]

FIG. 2 shows an embodiment of an exciter according to the present invention, which is formed by processing a rotary actuator which is an off-the-shelf product. The phase difference control mechanism is constituted by a plane including the center line of the output shaft. It is sectional drawing which cut | disconnected and drew. In this example, a part of the constituent members of the rotary actuator of the known example shown in FIG. 8 described above is processed with a low degree of processing, and the same reference numeral as in FIG. An output shaft 42 having a male thread 42a, an annular free piston 41 having a left female thread 41a and a right male thread 41b,
The lid 40e, the O-rings 43, and 44 are the same as the components of the known rotary actuator. The rotary actuator of the above-mentioned known example,
It is manufactured by POST (Netherlands), which is imported and sold by Far East Logistics Co., Ltd. Reference numeral 45 in this embodiment (FIG. 2)
The cylinders used as rotating members are shown with a symbol, and the pipe joint 40b is removed from the tubular body 40 which is a stationary member in the known off-the-shelf product (FIG. 8), and the tubular body 40 The outer peripheral surface is machined into a rotational surface shape (a cylindrical surface in this example), and the right female screw 40d remains as it is. The sleeve 46 is rotatably fitted on the rotary cylinder 45 having the outer peripheral surface modified as described above, and the O-ring 47 seals the sleeve 46 so as not to hinder the rotation. Then, through holes communicating with the pressure chambers contacting both end surfaces of the annular free piston 41 are bored in the cylindrical wall of the sleeve 46, and the pipe joints 48, 48 'are attached to the through holes. As a result, the rotary cylinder 4
A swivel joint is formed between 5 and the sleeve 46. Hereinafter, the sleeve 46 will be referred to as a swivel sleeve. Reference numeral 49 is a casing of the vibrator, and the mounting flange 46a of the swivel sleeve is mounted on the casing.

FIG. 1 is a cross-sectional view showing a state in which a phase difference control mechanism formed by processing a ready-made rotary actuator is connected to an exciter and cut by a plane passing through the center line of the output shaft. Is. The inner shaft 50 is a fixed eccentric weight shaft to which a fixed eccentric weight (not shown) is attached (the fixed eccentric weight and the movable eccentric weight will be described later in detail with reference to FIG. 4). The output shaft 42 is fixed to the inner shaft 50 concentrically with a key 52. A movable eccentric weight drive gear 57 is attached to the inner shaft 50 via a bush 53.
A is externally fitted so as to be relatively rotatable. 51 shown is
It is an outer tube arranged concentrically with the inner shaft 50. The outer tube 51 of the present example has a shorter length dimension than the diameter dimension and is intuitively close to a ring, but the outer tube in the present invention does not care about the ratio of the length dimension to the diameter dimension. The relationship between the inner shaft 50 and the movable eccentric weight drive gear 57A and the transmission counterpart member will be described later in detail with reference to FIG.

FIG. 3 is a vertical sectional view showing a phase difference control mechanism portion in an embodiment different from that of FIG. 2 described above, and is an example in which a communication hole is formed in the output shaft. However, two types of embodiments are schematically combined and drawn. Next, differences from the embodiment of FIG. 2 will be described. Output shaft 4 shown in FIG.
2'is a member obtained by subjecting the output shaft 42 shown in FIG. The rotary cylinder 45 'shown in FIG. 3 is a member which has been subjected to additional machining different from the rotary cylinder 45 shown in FIG. Detailed structural portions such as the right-hand screw, the left-hand screw, and the O-ring, and details similar to those of the embodiment of FIG. 2 are not shown in FIG. The swivel sleeve 46 fitted onto the rotary cylinder 45 in the embodiment of FIG. 2 is not provided in the embodiment of FIG. In FIG. 2 , the pressure fluid is supplied through the swivel sleeve 46, but in FIG. 3, a blind plug 54 is attached to the communication hole formed through the wall of the rotary cylinder 45 'to close it. . The portion drawn above the reference line A-A represents one embodiment, and the pressure chambers that come into contact with both end surfaces of the annular free piston 41 have communication holes (which are formed in the inner shaft 50). In FIG. 3, communication holes 55A and 55B, which are not shown and will be described later with reference to FIG. 4,) are formed in the output shaft 42 '.
The communication hole formed in the inner shaft 50 is supplied with the pressure fluid via a swivel joint (reference numeral 67, which will be described later with reference to FIG. 4) provided at the other end of the inner shaft 50. Below the reference line AA, an embodiment different from the above is shown. An extension shaft 70 is fixed concentrically with the output shaft 42 'by extension shaft mounting bolts 71. Although FIG. 3 schematically shows only one mounting bolt 71, the number of mounting bolts provided in the actual product of this embodiment is six. Two communication holes 56A, 56B communicating with the vicinity of both end surfaces of the annular free piston 41 are connected to a hose 73 via a swivel ring 72. As described above, the configuration in which the swivel ring 72 is externally fitted to the extension shaft 70 concentrically fixed to the output shaft to form the swivel joint is described above.
Is an application example of a configuration in which a swivel joint is provided at the other end of the inner shaft, and belongs to the technical scope of the configuration in which a swivel joint is provided at the other end of the inner shaft.

FIG. 4 is a schematic diagram showing an embodiment of the present invention. The phase difference control mechanism in the embodiment shown in FIG. 2 and the phase control mechanism portion shown in the upper half of FIG. And both are drawn. The phase difference control mechanism 60 whose outline is shown in FIG. 4 is the portion shown in FIG. 2 above. The inner shaft 50, the movable eccentric weight drive gear 57A, and the outer pipe 51 shown in FIG. 4 are the components shown in FIG. 1 above. The inner shaft 50 is rotatably supported by the vibrator casing 49, and is movable parallel to the inner shaft 50.
A, 63B and a fixed eccentric weight shaft 65 are rotatably supported. The fixed eccentric weight 62 is attached to the fixed eccentric weight shaft 65.
C has a movable eccentric weight 62B and 62A on the inner shaft 50.
However, a movable eccentric weight 64A is attached to the movable eccentric weight shaft 63A,
Movable eccentric weights 64B and 64C are fixed to the movable eccentric weight shaft 63B, respectively. Movable eccentric weight spindle 6
A movable eccentric weight driven gear 57B is fixed to 3A, and by the phase difference control mechanism 60 via the movable eccentric weight drive gear 57A and the outer tube 51 (for details, its rotating cylinder 45 (see FIG. 1)). Is driven to rotate.
The fixed eccentric weight shaft 65 is directly driven to rotate by the drive motor 61. In the present invention, direct rotational drive means synchronous rotation without increasing or decreasing speed. The inner shaft 50 includes fixed eccentric weight gears 66A and 6A.
6B and the fixed eccentric weight, and is rotated by the drive motor 61, and functions as a fixed eccentric weight. The movable eccentric weight shaft 63B is rotationally driven in synchronization with the movable eccentric weight shaft 63A via the movable eccentric weight gears 68B and 68A.
With the above transmission system structure, the three fixed eccentric weights 62A, 62B and 62C fixed to the two fixed eccentric weight shafts depicted in the upper half of FIG. Inner shaft 5 that rotates in synchronization with and functions as a fixed eccentric weight shaft
0 and the output shaft 42 rotate synchronously. On the other hand, the three eccentric weights 64A, 64B, 64 shown in the lower half of FIG.
C and the two movable eccentric weight shafts 63A and 63B are rotationally driven by the outer tube 51 and rotate synchronously with the outer tube 51. As a result, when the phase difference between the outer tube 51 and the output shaft 42 is adjusted by the action of the phase difference control mechanism 60, the three movable groups with respect to the three fixed eccentric weight groups depicted in FIG. 4 are moved. The rotational phase difference of the eccentric weight group is adjusted to be increased or decreased, and as a result, the total eccentric moment of the fixed eccentric weight and the movable eccentric weight is changed to control the vibration force. Next, considering a modification of the embodiment of FIG. 4, a fixed eccentric weight 62 is obtained from the configuration shown in the figure.
Even if C and the movable eccentric weights 64B and 64C are removed, it is possible to function as a biaxial exciter and control the exciter force. In addition, a third fixed eccentric weight shaft (not shown) is installed in parallel with the fixed eccentric weight shaft 65 to connect them with a synchronous transmission gear (not shown), and a movable eccentric weight shaft 63B is provided. Parallel to the third movable eccentric weight shaft (not shown)
It is also possible to control the excitation force of a multi-axis type exciter having 6 or more axes by installing the above and connecting both with a synchronous transmission gear (not shown). The pressure fluid for operating the phase difference control mechanism 60 may be supplied via a hose connected to the outer peripheral surface of the phase difference control mechanism as shown in FIG. It may be supplied by a hose 73 via a swivel ring 72 shown in FIG. 3, and at least two holes drilled in the longitudinal direction of the inner shaft 50 as shown in FIG.
It can also be supplied by the swivel joint 67 through a communication hole (shown by a broken line) in the book.

[0032]

Its configuration by way of embodiments of the present invention above, according to the present invention, as tighten if elucidating action, to the first aspect of the present invention
According to "the pressure chamber that applies fluid pressure to the annular free piston
Rotary cylinder to configure the
Rotation forming a swivel joint for guiding force fluid
Since it is also used as the "axial member", the structure is simple and the manufacturing
The strike is cheap.

According to the invention of claim 2, as a ready-made product,
As a mass production effect of rotary actuators sold
Effectively utilizing the low price and stable quality obtained by
By increasing or decreasing the eccentric moment of
Excitation force can be controlled.

According to the invention of claim 3 , the inner shaft and the outer pipe are
A communication hole is provided in the output shaft for relative rotation.
And this communication hole is connected to the swivel joint.
The output shaft, the annular free piston, and the cylinder.
Both ends of the annular free piston while rotating together
The surface can be actuated by supplying fluid pressure.

According to a fourth aspect of the invention, an off-the-shelf rotor
The invention of claim 3 by effectively utilizing the Lee actuator.
Phase control mechanism part of the exciter related to
Can be configured .

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state in which a phase difference control mechanism configured by processing a ready-made rotary actuator is connected to a vibration exciter and cut along a plane passing through a center line of an output shaft.

FIG. 2 shows an embodiment of an exciter according to the present invention, which is configured by processing a rotary actuator that is a ready-made product,
It is sectional drawing which cut | disconnected and drew the phase difference control mechanism by the surface containing the centerline of an output shaft.

FIG. 3 is a vertical cross-sectional view showing a phase difference control mechanism portion in an embodiment different from that of FIG. 2 described above, in which an output shaft is provided with a communication hole. However, two types of embodiments are schematically combined and drawn.

FIG. 4 is a schematic diagram showing an embodiment of the present invention, in which the phase difference control mechanism in the embodiment shown in FIG.
Both the phase control mechanism portion shown in the upper half of FIG. 3 is depicted.

FIG. 5 is a chart showing changes in vibration frequency at the start and stop of operation of the vibration device, in which the horizontal axis represents time.

FIG. 6 is a view for explaining a known technique of changing an exciting force by combining two eccentric weights, and (A) shows the two eccentric weights exhibiting the maximum exciting force. Is a schematic diagram showing a state in which the exciting force is medium, a schematic diagram showing a state in which the exciting force is medium, a schematic diagram showing a state in which the exciting force is slightly small, and a schematic diagram showing a state where the exciting force is zero. It is a schematic diagram showing a state.

FIG. 7 is a sectional view of a phase difference control mechanism in one embodiment of the vibration control mechanism according to the invention of the prior application.

FIG. 8 is a vertical sectional view showing an example of a rotary actuator which is a known hydraulic and pneumatic device.

[Explanation of symbols]

40 ... Cylindrical body, 41 ... Annular free piston, 42 ...
Output shaft, 45 ... Rotating cylinder, 46 ... Swivel sleeve, 48 ... Pipe joint, 50 ... Inner shaft, 51 ... Outer pipe, 55A,
55B ... communication hole, 56A, 56B ... extension communication hole, 60 ...
Phase difference control mechanism, 67 ... swivel joint, 72 ... swivel ring.

Claims (4)

(57) [Claims] 1.Synchronized with the drive motor by the drive motor
Fixed eccentric weight attached
Inner shaft, It is arranged concentrically with the above inner shaft and is used for driving a movable eccentric weight.
In an exciter having an outer tube to which a gear is fixed, A cylinder, which is a rotating member, is concentric with one end of the outer tube.
In addition to being fixed, the ring-shaped free
-Piston is stored, The output shaft inserted into the annular free piston is
It is fixed concentrically to one end of the shaft, and (A) The cylinder and the annular free piston are screw pairs.
Coupled via (B) The annular free piston and the output shaft are the same as the item a.
Connected via a screw pair that has a different twist direction from the screw pair of
Has been done, Or (A ') The cylinder and the annular free piston are screw pairs.
Coupled through the even number, (B ') The above-mentioned annular free piston and the output shaft are straight splices.
Are connected through the inn, Or (A ″) The cylinder and the annular free piston are straight splines.
Coupled through lines, (B ″) The annular free piston and the output shaft are screw pairs.
Are connected through The cylinder and the output shaft are the shafts.
Is constrained to move relative to the heart, The annular free piston moves in the axial direction due to the fluid pressure.
When it is moved back, the cylinder and output shaft will move relative to each other.
It is designed to be reciprocally rotated, And, relative to the cylinder which is the rotating member,
The sleeve is fitted so that it can rotate freely, and
The probe is fixed to the exciter casing, Swivel joint with the sleeve and cylinder
Is formed Exciting characterized byMachine. 2.Synchronized with the drive motor by the drive motor
Fixed eccentric weight attached
Inner shaft, It is arranged concentrically with the above inner shaft and is used for driving a movable eccentric weight.
In an exciter having an outer tube to which a gear is fixed, A cylinder, which is a rotating member, is concentric with one end of the outer tube.
In addition to being fixed, the ring-shaped free
-Piston is stored, The output shaft inserted into the annular free piston is
It is fixed concentrically to one end of the shaft, and (A) The cylinder and the annular free piston are screw pairs.
Coupled via (B) The annular free piston and the output shaft are the same as the item a.
Connected via a screw pair that has a different twist direction from the screw pair of
Has been done, Or (A ') The cylinder and the annular free piston are screw pairs.
Coupled through the even number, (B ') The above-mentioned annular free piston and the output shaft are straight splices.
Are connected through the inn, Or (A ″) The cylinder and the annular free piston are straight splines.
Coupled through lines, (B ″) The annular free piston and the output shaft are screw pairs.
Are connected through The cylinder and the output shaft are the shafts.
Is constrained to move relative to the heart, The annular free piston moves in the axial direction due to the fluid pressure.
When it is moved back, the cylinder and output shaft will move relative to each other.
It is designed to be reciprocally rotated, And the above-mentioned cylinder and output shaft, and these
The screw pair members that connect the
Finished or semi-finished product
It is a member made by processing the material, The cylinder that is the rotating member is a rotary actuator.
The outer surface of the cylindrical body, which is a stationary member in the
At least a part of it is processed into a surface of revolution With
The sleeve on the surface of rotation,
Is designed to function as a lu joint, The annular free piston of the rotary actuator and
The output shaft and the output shaft are the same or low.
Then, the annular free piston and the phase control mechanism of the vibration
And used as output shaft Exciting characterized by
Machine. 3.Synchronized with the drive motor by the drive motor
Fixed eccentric weight attached
Inner shaft, It is arranged concentrically with the above inner shaft and is used for driving a movable eccentric weight.
In an exciter having an outer tube to which a gear is fixed, A cylinder, which is a rotating member, is concentric with one end of the outer tube.
In addition to being fixed, the ring-shaped free
-Piston is stored, The output shaft inserted into the annular free piston is
It is fixed concentrically to one end of the shaft, and (A) The cylinder and the annular free piston are screw pairs.
Coupled via (B) The annular free piston and the output shaft are the same as the item a.
Connected via a screw pair that has a different twist direction from the screw pair of
Has been done, Or (A ') The cylinder and the annular free piston are screw pairs.
Coupled through the even number, (B ') The above-mentioned annular free piston and the output shaft are straight splices.
Are connected through the inn, Or (A ″) The cylinder and the annular free piston are straight splines.
Coupled through lines, (B ″) The annular free piston and the output shaft are screw pairs.
Are connected through The cylinder and the output shaft are the shafts.
Is constrained to move relative to the heart, The annular free piston moves in the axial direction due to the fluid pressure.
When it is moved back, the cylinder and output shaft will move relative to each other.
It is designed to be reciprocally rotated, And, at least two pressures in the longitudinal direction are applied to the inner shaft.
A communication hole for supplying a force fluid is formed and
The swivel joint provided at one end of the inner shaft is
It is connected to the communication hole, Each of the at least two communication holes is provided on the output shaft.
There is a communication hole connected to it, At least two communication holes formed in the output shaft are
Each communicates with both end faces of the annular free piston.
Exciting characterized byMachine. 4.Cylinder and output shaft, as well as
In addition, a screw pair member that connects these to each other is
Finished product or semi-manufactured rotary actuator
A member made by processing a product or material, The cylinder, which is the rotating member, is a rotary actuator.
It is provided on a cylindrical body that is a stationary member in the motor.
The hole for supplying pressure fluid is closed, The output shaft is the output shaft of the rotary actuator.
, With a communication hole for pressure fluid supply, The annular free piston described above is a rotary actuator.
The circular free piston of the
It is used after being processed according to the degree of work. Characterized by
To claimThreeExcitation described inMachine.