JP2021059447A - Wheel shaft lifting device - Google Patents

Abstract

To provide a wheel shaft lifting device for a railway vehicle capable of securing a stroke amount larger than the depth of a pit where the device is installed.SOLUTION: A wheel shaft lifting device 100 for a railway vehicle used for maintaining a wheel shaft 50 of the railway vehicle, includes: a first shaft support unit and a second shaft support unit respectively receiving axle end parts 50a of the wheel shaft 50 and corresponding to shaft support parts rotatably supported by the wheel shaft 50; an engagement chain that has a pair of chain parts such that a pair of chain members are mutually moved in a traveling direction to be engaged and integrated with each other; a first linear motion guide unit and a second linear motion guide unit including a multistage stroke mechanism; and a first lifting device 111A and a second lifting device 111B for respectively moving up/down the first shaft support unit and the second shaft support unit by using a first motor with a brake and a second motor with a brake that correspond to driving mechanisms for moving the engagement chain forward and backward.SELECTED DRAWING: Figure 2

Description

The present invention relates to an equipment for lifting a wheel set of a railroad vehicle bogie for maintenance and the like, and specifically to a technique for realizing space saving in the device configuration of a wheel set elevating device.

Railroad vehicles need to be overhauled and repaired on a regular basis, and the wheel sets removed from the bogies are also lifted up for maintenance. For lifting up the wheel set, a lifting device using a hydraulic cylinder and a lifting device using an electric jack are known. However, for example, in the case of an elevating device using a hydraulic cylinder, the size of the hydraulic cylinder is required according to the lift amount of the wheel set. Since a lift amount of about 500 mm to 700 mm is required for the maintenance of the wheel set, the lifting device arranged under the floor also needs to have a depth of about the same or more. Therefore, it is necessary to deepen the pit, but there are cases where the depth of the pit cannot be secured due to the convenience of the maintenance shop.

It is also conceivable to adopt a table lift method for lifting up the wheel set. For example, Patent Document 1 discloses a technique relating to a table lift, in which a top plate body and a bottom plate body are connected to each other so as to be close to each other and separated from each other by an arm body. The arm body has a structure that can be folded between the top plate body and the bottom plate body, and the appearance of being compactly folded in the height direction is disclosed.

Utility Model Registration No. 3076765

However, when the technique of Patent Document 1 is used, the arm body needs to be folded and stored in the space between the top plate body and the bottom plate body, so that the length of the arm body is long in order to secure the stroke amount. It is necessary to increase the area of the top plate and the bottom plate accordingly. Therefore, the space between the top plate and the bottom plate is an area where the worker cannot enter the body, and the top plate requires a certain area, which reduces workability and impairs maintainability. Can be considered.

Therefore, an object of the present invention is to solve such a problem and to provide a wheel set elevating device for a railway vehicle capable of securing a stroke amount larger than the depth of a pit in which the device is installed.

In order to achieve the above object, the wheel set elevating device for a railway vehicle according to one aspect of the present invention has the following features.

(1) In a wheelset elevating device for a railroad vehicle used to maintain an axle of a railroad vehicle carriage, a shaft support portion that receives each of the axle ends of the axle and rotatably supports the axle, and a pair of chain portions. A meshing chain having a pair of chain members that mesh with each other and integrate with each other by moving in the traveling direction, a linear motion guide provided with a multi-stage stroke mechanism, and a drive mechanism for advancing and retreating the meshing chain. It is characterized in that the shaft support portion elevating mechanism for raising and lowering the shaft support portion by using the drive mechanism is provided, and the drive mechanism is synchronously controlled to raise and lower the shaft support portion.

According to the embodiment described in (1) above, it is possible to provide an elevating device capable of securing an elevating stroke amount rather than the depth of the pit in which the wheel set elevating device is housed. This is because an elevating device using a meshing chain is adopted for the elevating mechanism of the shaft support portion. Since the elevating device using the meshing chain is stored by winding the chain in a roll shape, it can be stored relatively compactly. And since a linear motion guide equipped with a multi-stage stroke mechanism is used, it is possible to cope with a load in the lateral direction. Therefore, the wheel set can be safely lifted up to the required height, and the thickness of the device can be compactly suppressed.

As shown in the problem, there may be a request to make the pit shallower due to the circumstances of the factory, and in order to meet such a request, the conventional configuration using a cylinder or the configuration using an electric jack It was difficult to suppress the height direction of the device. However, by adopting a propulsion mechanism using a meshing chain, it is possible to obtain a predetermined thrust while suppressing the height direction. Moreover, unlike the table lift, it does not deteriorate the maintainability, so it can be expected to contribute to the improvement of the maintainability.

(2) In the wheel axle elevating device for a railroad vehicle according to (1), a gear box support portion that receives a gear box attached to the axle of the wheel axle, the meshing chain, the linear motion guide, and the drive mechanism are provided. It is preferable to provide a gear box elevating mechanism for raising and lowering the gear box support portion.

According to the embodiment described in (2) above, the wheel set elevating device can be compactly configured by using the meshing chain. The meshing chain is a mechanism that arranges a set of chains so as to face each other and meshes with each other, and realizes raising and lowering by using a driving force of a motor or the like. Although it is often used for small devices, the applicant has confirmed through experiments that it can be used for a drive mechanism that raises the wheel set by increasing the size of the chain. By ensuring the strength in the horizontal direction with a linear motion guide, a compact wheel set elevating device can be realized. In this case, the end of the wheel set can be gripped to lift up the wheel set, and a braking function is added to the motor. As a result, the workability of the worker can be improved.

(3) In the wheel set elevating device for a railway vehicle according to (1) or (2), the shaft support portion comprises a first shaft support portion and a second shaft support portion, and the first shaft support portion and the said It is preferable to provide an inter-axis adjustment mechanism for adjusting the distance from the second axis support portion.

According to the aspect described in (3) above, it is possible to correspond to a plurality of wheel sets. In addition to the typical narrow track and wide gauge track, railroad tracks of various widths are adopted, and different wheel sets may be used for each. However, by providing a wheel set adjustment mechanism, it is possible to support various types of wheel sets by providing a configuration that can support a plurality of types of wheel sets. Therefore, it is possible to improve maintainability.

It is a top view of the wheel set elevating device for a railroad vehicle of this embodiment. It is a side sectional view of the wheel set elevating device of this embodiment. It is a side sectional view explaining the setup change of the wheel set elevating device of this embodiment. It is a perspective view of the wheel set elevating device of this embodiment. It is a perspective view of the state which the wheel set elevating device of this embodiment is housed in a pit. It is explanatory drawing of the state in which the linear motion guide unit is at the lower end of this embodiment. It is explanatory drawing of the state in which the linear motion guide unit is in the middle of this embodiment. It is explanatory drawing of the state in which the linear motion guide unit is at the upper end of this embodiment. It is explanatory drawing of the state in which the gear box support unit is at the upper end of this embodiment.

First, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a plan view of a wheel set elevating device for a railway vehicle according to the present embodiment. FIG. 2 shows a side sectional view of the wheel set elevating device. FIG. 3 shows a side sectional view of the setup change of the wheel set elevating device. FIG. 4 shows a perspective view of the wheel set elevating device. FIG. 5 shows a perspective view of a wheelset elevating device housed in a pit. The wheel set elevating device 100 is housed in a pit 10 provided in the factory. Therefore, it is possible to roll the wheel set 50 and move it onto the wheel set elevating device 100 on the track 20 provided with respect to the floor surface in the factory. The track 20 includes a reference side rail 20A, a first rail 20B corresponding to a narrow gauge, and a second rail 20C corresponding to a wide gauge.

The wheel set lifting device 100 lifts up the wheel set 50 used in a railway vehicle. The wheel axle 50 includes axle end portions 50a provided at both ends of the axle 50c, wheels 50b attached to the axle 50c, and a gear box 50d arranged inside the wheels 50b. Regarding the gear box 50d, there is a wheel set 50 that does not have the gear box 50d, but the present invention can be applied even in that case. The wheel set elevating device 100 includes a moving side unit 101 and a fixed side unit 102, the moving side unit 101 is provided with the first shaft support unit 110, and the fixed side unit 102 is provided with the second shaft support unit 120 and the gear box. A support unit 130 is provided.

The wheel axle 50 has a wide gauge 50A and a narrow gauge 50B, and the lengths of the axles 50c are different. By moving the moving side unit 101, these two types of wheel sets 50 are designed to be lifted up by the wheel set elevating device 100 as shown in FIG. If necessary, the wheel set elevating device 100 can be made to correspond to a plurality of types of wheel sets 50. The first axis support unit 110 and the second axis support unit 120 have substantially the same structure, the first elevating device 111A is the first linear motion guide unit 115A, and the second elevating device 111B is the second linear motion guide unit. It is equipped with 115B. Further, the gear box support unit 130 also has a configuration similar to that of the first shaft support unit 110 and the second shaft support unit 120, and includes a third elevating device 111C and a third linear motion guide unit 115C. There is.

The first elevating device 111A is provided with a motor 112A with a first brake, and the second elevating device 111B is provided with a motor 112B with a second brake. The meshing chain (not shown) provided inside the first elevating device 111A and the second elevating device 111B has a structure for advancing and retreating, and the portion covered by the first boot 113A and the second boot 113B having a bellows structure expands and contracts. The first linear motion guide unit 115A and the second linear motion guide unit 115B operate in synchronization with each other. At this time, the third linear motion guide unit 115C also operates in synchronization. When the wheel set 50 is not provided with the gear box 50d, it is desirable to be able to select a control that does not synchronize the third linear motion guide unit 115C.

FIG. 6 shows an explanatory diagram of a state in which the linear motion guide unit is at the lower end. FIG. 7 shows an explanatory diagram of a state in which the linear motion guide unit is in the middle. FIG. 8 shows an explanatory diagram of a state in which the linear motion guide unit is at the upper end. 6 to 8 show a view from the right side of FIG. 2, and thus it is a diagram for explaining the second axis support unit 120. However, the first shaft support unit 110 has the same structure. Therefore, the reference numerals shown in the drawings describe, for example, that the second linear motion guide unit 115B is the same as the first linear motion guide unit 115A. As a notation, when it first appears, it is indicated as a second linear motion guide unit 115B (first linear motion guide unit 115A).

The second wheel bearing 140B (first wheel bearing 140A) directly receives the axle end portion 50a of the wheel set 50, and the second wheel bearing 140B has a pair of second rollers 141B (a pair of first roller 141A). Is provided to rotatably support the wheel set 50. The second wheel bearing 140B is supported by the second top plate 139B (first top plate 139A), and the second inner rod 133B (first inner rod 133A) is connected to the second top plate 139B.

The second inner rod 133B is supported by a second inner linear bush guide 134B (first inner linear bush guide 134A) so as to be linearly movable. The second inner linear bush guide 134B is fixed to the second inner base 135B (first inner base 135A). The second outer linear bush guide 132B (first outer linear bush guide 132A) is fixed to both sides of the second inner base 135B, and both ends of the second outer linear bush guide 132B hold the second outer rod. The second outer rod 131B (first outer rod 131A) held by the tool 138B (first outer rod holder 138A) is pierced and supported. The second outer rod holder 138B is fixed to the second outer base 136B (first outer base 136A). Then, the second outer base 136B is fixed to the fixed side unit 102, and the first outer base 136A (not shown) is fixed to the moving side unit 101.

FIG. 9 shows an explanatory view of a state in which the gearbox support unit is at the upper end. As described above, the gearbox support unit 130 has almost the same configuration as the first shaft support unit 110 and the second shaft support unit 120, but due to the problem of securing a place for arranging the third brake motor 112C, It is configured using a chain 118. That is, a sprocket 117 is provided on the shaft of the motor 112C with the third brake, and the structure is such that power is transmitted to the third elevating device 111C side via the chain 118.

The gearbox support unit 130 has the same structure as the first shaft support unit 110 and the second shaft support unit 120. Therefore, the third inner rod 133C is connected to the third top plate 139C, and the third inner rod 133C is supported by the third inner linear bush guide 134C so as to be linearly movable. The third inner linear bush guide 134C is fixed to the third inner base 135C. Further, the fifth outer linear bush guide 132C is fixed to both sides of the third inner base 135C, and both ends of the fifth outer linear bush guide 132C are held by the third outer rod holder 138C. It penetrates and supports the rod 131C. The third outer rod holder 138C is fixed to the third outer base 136C, and the third outer base 136C is fixed to the fixed side unit 102.

A third top plate 139C is provided at the tip of the third inner rod 133C. Then, the holder 145 can be supported by the third top plate 139C. Although the holder 145 is not shown, it has a roller at the lower end and has a structure in which it comes into contact with the upper surface of the third top plate 139C. Since the holder 145 has such a structure, it can be removed when not in use.

The wheel set elevating device 100 has such a configuration, and the wheel set 50 can be moved up and down by operating a switch or the like provided on an operation panel (not shown). Here, the first axis support unit 110 and the second axis support unit 120 have a structure of ascending and descending in synchronization, and as shown in FIG. 2, the second position P2 which is the upper end position from the first position P1. The axle 50 can be lifted up to. It is also possible to stop at the third position P3, which is an intermediate position as shown in FIG. 7. Here, if the wheel set 50 is provided with the gear box 50d, the gear box 50d can be held so as not to rotate by raising the gear box support unit 130 using a holder 145 or the like. .. When the wheel set 50 that does not have the gear box 50d is lifted up, the gear box support unit 130 may not be operated.

Since the wheel set elevating device 100 for a railway vehicle of the present embodiment has the above configuration, it exhibits the following actions and effects.

First, as an effect of the present embodiment, there is an effect that it is possible to provide a wheel set elevating device 100 for a railway vehicle capable of securing a stroke amount larger than the depth of the pit 10 on which the device is installed. This corresponds to a shaft support portion that receives the axle end portions 50a of the axle 50 and rotatably supports the axle 50 in the axle lifting device 100 for a railway vehicle used for servicing the axle 50 of the railway vehicle carriage. A meshing chain having a pair of chain portions with the first shaft support unit 110 and the second shaft support unit 120, and the pair of chain members moving in the traveling direction to mesh with each other and integrate with each other, and a multi-stage stroke. A first linear motion guide unit 115A and a second linear motion guide unit 115B provided with a mechanism, and a first brake-equipped motor 112A and a second brake-equipped motor 112B corresponding to a drive mechanism for advancing and retreating the meshing chain were used. This is because the first elevating device 111A and the second elevating device 111B for raising and lowering the first shaft support unit 110 and the second shaft support unit 120, respectively, are provided.

That is, the first shaft support unit 110, the second shaft support unit 120, and the gearbox support unit 130 are provided with a first lifting device 111A, a second lifting device 111B, and a third lifting device 111C using a meshing chain. This makes it possible to keep the height low. This is because the meshing chain has a structure in which the chain is wound and stored in the state before meshing, for example, as shown in Japanese Patent Application Laid-Open No. 2018-56534, so that the meshing chain can be compactly arranged in the height direction. .. Therefore, even when the strokes of the first shaft support unit 110 and the second shaft support unit 120 are set to 650 mm, the depth of the pit 10 can be suppressed to 500 mm or less.

Reducing the depth of the pit 10 leads to the reduction of the cost required for the construction of the pit 10, and also contributes to shortening the construction period. In particular, considering the renewal of aging equipment, it is desirable that the existing pit 10 can be used. Therefore, the provision of the wheel set elevating device 100, which is more compact than the conventional structure, has the advantage of shortening the construction period. Are better.

Further, the motor 112A with the first brake and the motor 112B with the second brake that drive the first axis support unit 110 and the second axis support unit 120 are synchronously controlled to control the first axis support unit 110 and the second axis support unit 120. The wheel axle 50 can be safely moved up and down by moving the wheels up and down in synchronization. Further, by raising and lowering the gear box support unit 130 in synchronization with the first shaft support unit 110 and the second shaft support unit 120 as necessary, it is possible to prevent the gear box support unit 130 from moving when raising and lowering the wheel set 50. This leads to the safe raising and lowering of the wheel set 50.

Further, since the motor 112A with the first brake and the motor 112B with the second brake are used for synchronous control, not only the first position P1 is lifted up to the second position P2, but also the intermediate position shown in FIG. 7 is used. It is possible to stop at an arbitrary height such as the third position P3. Since the structure is such that the force in the horizontal direction is received by the first linear motion guide unit 115A and the second linear motion guide unit 115B, the strength in the horizontal direction is also ensured. Therefore, it is possible to cope with the case where the wheel set 50 is maintained while rotating. Further, since the first boot 113A and the second boot 113B are provided on the outside of the meshing chain, they also have a function of preventing entanglement.

Further, since the wheel axle 50 is rotatably held by the first wheel bearing 140A and the second wheel bearing 140B, the wheel set 50 is lifted up by the first shaft support unit 110 and the second shaft support unit 120. It can be rotated and maintained. This structure improves workability. Further, since the wheel set elevating device 100 includes the moving side unit 101 and the fixed side unit 102, it is possible to change the setup so as to correspond to the wide gauge 50A and the narrow gauge 50B. Such consideration also contributes to the improvement of workability.

Further, by adopting a structure in which the first shaft support unit 110 and the second shaft support unit 120 are raised and lowered by using the motor 112A with the first brake and the motor 112B with the second brake, for example, when a hydraulic cylinder is used. It is no longer necessary to maintain the height by flood control when stopped. By doing so, noise due to the driving noise of the hydraulic pump is not generated during the inspection and maintenance work. Further, it is considered that the adoption of the motor 112A with a first brake and the motor 112B with a second brake having a built-in encoder facilitates synchronous control. If the high stroke is raised and lowered by flood control, it is necessary to worry about the deviation of the raising and lowering timing and oil leakage, but these problems can be solved and the safety of the operator can be improved. Another merit is that this improves maintainability.

Although the wheel set elevating device 100 for a railway vehicle according to the present invention has been described above, the present invention is not limited to this, and various changes can be made without departing from the gist thereof.

10 Pit 50 Wheelset 100 Wheelset lifting device 110 1st shaft support unit 111A, 111B, 111C 1st, 2nd, 3rd lifting device 112A, 112B, 112C 1st, 2nd, 3rd brake motor 113A, 113B, 113C 1st, 2nd and 3rd boots 115A, 115B, 115C 1st, 2nd and 3rd linear motion guide unit 120 2nd axis support unit 130 Gearbox support unit 140A, 140B 1st and 2nd wheel bearings

Claims (3)

In the wheel set lifting device for railroad vehicles used to maintain the wheel sets of railroad bogies
A shaft support portion that receives the axle ends of the wheel sets and rotatably supports the wheel sets, and
A meshing chain that has a pair of chain parts and the pair of chain members move in the direction of travel to mesh with each other and integrate with each other.
A linear motion guide with a multi-stage stroke mechanism and
A drive mechanism for advancing and retreating the meshing chain and a shaft support elevating mechanism for raising and lowering the shaft support using the drive mechanism are provided.
Synchronously controlling the drive mechanism to move the shaft support up and down.
A wheel set elevating device for railway vehicles. In the wheel set elevating device for a railway vehicle according to claim 1.
A gearbox support that receives the gearbox attached to the axle of the axle, and
A gear box elevating mechanism that includes the meshing chain, the linear motion guide, and the drive mechanism to elevate and elevate the gear box support portion.
A wheel set elevating device for railway vehicles. In the wheel set elevating device for a railway vehicle according to claim 1 or 2.
The shaft support portion is composed of a first shaft support portion and a second shaft support portion.
Provided with an inter-axis adjustment mechanism for adjusting the distance between the first shaft support portion and the second shaft support portion.
A wheel set elevating device for railway vehicles.

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