Axle end drive, wheelset and bogie

Abstract

This invention relates to the field of rail vehicle technology, providing an axle-end transmission device, wheelset, and bogie. The axle-end transmission device includes an axle-end spline, a flexible plate, and a connecting plate. The axle-end spline has a connecting hole for inserting a spindle. The flexible plate's axle-end spline is connected to the flexible plate via a first connecting member. One end of the connecting plate is connected to the flexible plate via a second connecting member, and the other end is connected to the wheel via a third connecting member. In this manner, the spindle end is connected to the axle-end spline for transmitting power to the wheel. The spindle is not directly connected to the bogie, thus the forces exerted by the bogie and the car body on the spindle are not directly applied. This significantly reduces the axial force and pressure on the spindle, allowing for a smaller diameter spindle without affecting its service life, meeting lightweight requirements.

Description

Technical Field

[0001] This invention relates to the field of rail vehicle technology, and in particular to an axle-end transmission device, wheelset, and bogie. Background Technology

[0002] With the rapid development of rail transit, lightweighting is one of the important goals of modern rail vehicle design. On the one hand, lightweighting reduces the vehicle's weight, saves raw materials, and lowers manufacturing costs; on the other hand, lightweighting reduces the vehicle's traction and braking forces, achieving energy conservation and consumption reduction, effectively reducing the load on the line and saving maintenance costs.

[0003] As one of the most important components of a rail vehicle, the bogie is rigidly connected to the drive shaft and wheels. The drive shaft provides power to the wheels, while the axle is also subjected to pressure from the bogie frame and the car body, as well as axial force during turning. This is not conducive to the long-term use of the axle and the requirements for lightweighting the entire vehicle. Summary of the Invention

[0004] This invention provides an axle-end transmission device, wheelset, and bogie to solve the technical problems of low axle life and failure to meet the requirements of vehicle lightweighting in the prior art.

[0005] This invention provides a shaft end transmission device, comprising: a shaft end spline having a connecting hole for inserting a mandrel;

[0006] A flexible plate, wherein the shaft end spline is connected to the flexible plate via a first connector;

[0007] The connecting plate is connected to the flexible plate at one end via a second connector and to the wheel at the other end via a third connector.

[0008] According to one embodiment of the present invention, the connecting hole is provided with internal key teeth for engaging with external key teeth at the end of the mandrel.

[0009] According to one embodiment of the present invention, the shaft end spline includes a connecting end and an extension end, the diameter of the connecting end is larger than the diameter of the extension end, and the connecting hole penetrates through the connecting end and the extension end;

[0010] The connecting end is provided with a plurality of first mounting holes, and the flexible plate is provided with a plurality of second mounting holes corresponding to the first mounting holes;

[0011] The first connector is a threaded connector, and the flexible plate passes through the threaded connector in sequence through the first mounting hole and the second mounting hole to connect with the shaft end spline.

[0012] According to one embodiment of the present invention, a first gasket is sleeved on the first connector, the first gasket being located between the shaft end spline and the flexible plate and abutting against the shaft end spline and the flexible plate respectively.

[0013] According to one embodiment of the present invention, the flexible plate is further provided with a plurality of third mounting holes, and the connecting plate is provided with a plurality of fourth mounting holes corresponding to the third mounting holes;

[0014] The second connector is a threaded connector, and the flexible plate is connected to the connecting plate by passing through the threaded connector sequentially through the third mounting hole and the fourth mounting hole.

[0015] According to one embodiment of the present invention, the connecting plate is provided with a plurality of extended mounting blocks on its outer periphery, and the fourth mounting hole is formed on the extended mounting blocks;

[0016] The connecting plate is also provided with a plurality of fifth mounting holes. The third connecting member is a threaded connecting member. The connecting plate is connected to the wheel by passing through the threaded connecting member through the fifth mounting holes and the mounting holes on the wheel.

[0017] According to one embodiment of the present invention, the extension mounting blocks are evenly spaced along the outer circumference of the connecting plate.

[0018] According to one embodiment of the present invention, a second gasket is sleeved on the second connector, the second gasket being located between the flexible plate and the connecting plate and abutting against the flexible plate and the connecting plate respectively.

[0019] This invention also provides a wheelset, comprising: a spindle, with shaft end transmission devices as described above at both ends;

[0020] A wheel, with one end of the axle-end transmission device connected to the wheel;

[0021] A bushing is fitted over the spindle, and both ends of the bushing are connected to the wheel via bearings.

[0022] This invention also provides a bogie, comprising: a frame;

[0023] The aforementioned wheelset is mounted on the frame.

[0024] The shaft-end transmission device provided in this embodiment of the invention has a spindle end connected to a shaft end spline for transmitting power to the wheel. The spindle is not directly connected to the bogie, so the force between the bogie and the car body is not directly applied to the spindle. As a result, the axial force and pressure on the spindle are greatly reduced, and the spindle can have a smaller diameter without affecting its service life, thus meeting the requirements of lightweighting.

[0025] The wheelset provided in this embodiment of the invention includes the above-mentioned axle-end transmission device and has all the beneficial effects of the axle-end transmission device. To avoid repetition, it is not limited here.

[0026] The bogie provided in this embodiment of the invention includes the aforementioned wheelset and has all the beneficial effects of the axle-end transmission device. To avoid repetition, it is not limited here. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 This is a partial structural schematic diagram of the bogie of the present invention;

[0029] Figure 2 This is a structural schematic diagram of the shaft-end transmission device of the present invention at one angle;

[0030] Figure 3 This is a schematic diagram of the shaft-end transmission device of the present invention from another angle;

[0031] Figure 4 for Figure 2 The diagram shows the structure of the spline at the shaft end.

[0032] Figure 5 for Figure 2 The diagram shows the structure of the flexible plate.

[0033] Figure 6 yes Figure 2 The diagram shows the structure of the connecting plate.

[0034] Figure 7 yes Figure 1 The diagram shows the structure of the mandrel.

[0035] Figure 8 yes Figure 1 The diagram shows the structure of a wheel.

[0036] Figure label:

[0037] 10. Shaft end spline; 110. Connecting hole; 120. First connecting piece; 130. Connecting end; 1310. First mounting hole; 140. Extension end;

[0038] 20. Flexible sheet; 220. Second mounting hole; 230. First gasket; 240. Third mounting hole;

[0039] 30. Connecting plate; 310. Second connecting piece; 320. Fourth mounting hole; 330. Extension mounting block; 340. Fifth mounting hole; 350. Second gasket;

[0040] 40. Wheelset; 410. Spindle; 411. Spline mount; 412. Speed ​​measuring gear mount; 413. Bearing mount; 414. Large gear mount; 420. Wheel; 421. Wheel rim; 422. Elastic rubber; 423. Pressure ring; 424. Mounting screw; 425. Auxiliary plate; 430. Bushing; 440. Shaft end drive device;

[0041] 50. Drive motor;

[0042] 60. Gearbox. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0044] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0046] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] The following is combined Figures 1-8 The shaft-end drive device 440, wheelset 40, and bogie of an embodiment of the present invention are described.

[0049] The bogie includes wheelset 40 and frame, with wheelset 40 mounted on the frame.

[0050] Please refer to Figure 1 The wheelset 40 includes a spindle 410 and two wheels 420 located at the ends of the spindle 410. The power of the spindle 410 comes from the drive motor 50 and the gearbox 60. When the drive motor 50 rotates, the power is transmitted to the spindle 410 through the gearbox 60, and then the spindle 410 drives the wheels 420 to rotate.

[0051] Specifically, wheel 420 (refer to...) Figure 8 The wheel includes a rim 421, an elastic rubber 422, a pressure ring 423, mounting screws 424, and an auxiliary plate 425. The elastic rubber 422 is installed between the rim 421 and the auxiliary plate 425, which can reduce vibration and noise and reduce the vibration of the rail wheel 420.

[0052] The auxiliary plate 425 and pressure ring 423 are made of aluminum alloy, effectively reducing the weight of the wheel 420 and achieving a lightweight design. The mounting screw 424 facilitates the installation of the connection structure between the sealing ring and the wheel 420.

[0053] In one embodiment, the spindle 410 is provided with shaft end transmission devices 440 at both ends, and the spindle 410 transmits power to the wheel 420 through the shaft end transmission devices 440. A bushing 430 is provided on the outside of the spindle 410 and connected to the wheel 420. The frame, drive motor 50 and gearbox 60 are all mounted on the bushing 430. The bushing 430 provides support for the frame, gearbox 60 housing, etc. The spindle 410 does not need to bear too much pressure on the frame and one side of the car body. The axial force during turning is also greatly reduced due to the bushing 430. In this way, the spindle 410 can meet the normal transmission function while allowing for the selection of structural components with smaller diameters, thus meeting the requirements for lightweight rail vehicles.

[0054] In other words, the spindle 410 does not need to be directly rigidly connected to the wheel 420. The axial force on the wheel 420 when turning is absorbed by the bushing 430, and the bushing 430 supports the gearbox 60 housing and the drive motor 50. The weight of the gearbox 60 and the drive motor 50 does not put pressure on the spindle 410. The frame is connected to the bushing 430, thereby further reducing the force applied to the spindle 410 by the bogie. The bushing 430 is connected to the wheel 420 through bearings, and the rotation of the wheel 420 will not drive the bushing 430 to rotate. Furthermore, the bushing 430 and the wheel 420 are detachable, facilitating the inspection and replacement of the bushing 430.

[0055] Please refer to Figure 2 and Figure 3 In one embodiment, the shaft-end transmission device 440 includes a shaft-end spline 10, a flexible plate 20, and a connecting plate 30. The shaft-end spline 10 has a connecting hole 110 for inserting a mandrel 410. The shaft-end spline 10 is connected to the flexible plate 20 via a first connecting member 120. One end of the connecting plate 30 is connected to the flexible plate 20 via a second connecting member 310, and the other end is connected to the wheel 420 via a third connecting member.

[0056] The end of the spindle 410 is connected to the end spline 10 of the shaft and is used to transmit power to the wheel 420. The spindle 410 is not directly connected to the bogie, so the force of the bogie and the car body is not directly applied to the spindle 410. As a result, the axial force and pressure on the spindle 410 are greatly reduced. The spindle 410 can have a smaller diameter without affecting its service life, thus meeting the requirements of lightweighting.

[0057] Specifically, refer to Figure 7 The spindle 410 is provided with a spline mounting seat 411, a speed measuring gear mounting seat 412, a bearing mounting seat 413, and a large gear mounting seat 414. The gear set in the gearbox 60 includes a large gear that rotates and meshes with the large gear mounting seat 414. The end of the spindle 410 is engaged with the shaft end spline 10 through the spline mounting seat 411 to realize the torque transmission from the spindle 410 to the wheel 420.

[0058] The speed measuring gear facilitates the monitoring of train speed. The bearing mounting seat 413 is used to connect the bearing. The bearing mainly realizes rotation and radial and axial positioning, avoiding the impact of spindle 410 rotation on transmission performance.

[0059] The spindle 410, shaft end spline 10, flexible plate 20, and connecting plate 30 are coaxially mounted. An internal key tooth is formed in the connecting hole 110 of the shaft end spline 10 to mate with the external key tooth at the end of the spindle 410. The length of the internal key tooth extends in the same direction as the axial direction of the connecting hole 110. There is an interference fit between the external key tooth at the end of the spindle 410 and the internal key tooth in the connecting hole 110. The output of the drive motor 50 transmits power to the gearbox 60, the gear set in the gearbox 60 transmits power to the axle, and the rotation of the axle transmits power to the wheel 420.

[0060] Please refer to Figure 4 In one embodiment, the shaft end spline 10 includes a connecting end 130 and an extension end 140. The diameter of the connecting end 130 is larger than the diameter of the extension end 140. A connecting hole 110 passes through the connecting end 130 and the extension end 140. A plurality of first mounting holes 1310 are provided on the connecting end 130, and a plurality of second mounting holes 220 corresponding to the first mounting holes 1310 are provided on the flexible plate 20. The first connecting member 120 is a threaded connecting member. The flexible plate 20 is connected to the shaft end spline 10 by passing through the threaded connecting member sequentially through the first mounting holes 1310 and the second mounting holes 220.

[0061] The extension end 140 ensures the installation length of the mandrel 410 and the shaft end spline 10, thereby improving the installation stability between the mandrel 410 and the wheel 420. The number of first mounting holes 1310 and second mounting holes 220 corresponds one-to-one. The first mounting holes 1310 are spaced circumferentially along the outer side of the connecting end 130, and the second mounting holes 220 are positioned to match the first mounting holes 1310. Both the first mounting holes 1310 and the second mounting holes 220 are circular holes. The circular holes do not require consideration of installation direction or angle; installation is possible as long as two holes are aligned, which improves the installation efficiency of the shaft end spline 10 and the flexible plate 20.

[0062] The threaded connector can be a bolt, with a first washer 230 fitted on the bolt. The first washer 230 is located between the shaft end spline 10 and the flexible plate 20, and abuts against the shaft end spline 10 and the flexible plate 20 respectively, playing a buffering role. The first mounting hole 1310 and the second mounting hole 220 are both provided with threads, and are used with lock nuts to connect the shaft end spline 10 and the flexible plate 20, improving the installation stability between the shaft end spline 10 and the flexible plate 20.

[0063] Please refer to Figure 5 and Figure 6In one embodiment, the flexible plate 20 is provided with a plurality of third mounting holes 240, and the connecting plate 30 is provided with a plurality of fourth mounting holes 320 corresponding to the third mounting holes 240; the second connecting member 310 is a threaded connecting member, and the flexible plate 20 is connected to the connecting plate 30 by passing through the threaded connecting member in sequence through the third mounting holes 240 and the fourth mounting holes 320.

[0064] Threaded connectors can be, but are not limited to, bolts. The third mounting hole 240 and the fourth mounting hole 320 can both be round holes with internal threads. The flexible plate 20 is connected to the connecting plate 30 by bolts and lock nuts, which improves the installation stability of the flexible plate 20 and the connecting plate 30.

[0065] In one embodiment, the connecting plate 30 is provided with a plurality of extended mounting blocks 330 on its outer periphery, and a fourth mounting hole 320 is provided on the extended mounting block 330; the connecting plate 30 is also provided with a plurality of fifth mounting holes 340, and the third connector (not shown) is a threaded connector, and the connecting plate 30 is connected to the wheel 420 by means of the threaded connector passing through the fifth mounting holes 340 and the mounting holes on the wheel 420.

[0066] The extension mounting blocks 330 are evenly spaced along the outer periphery of the connecting plate 30. The extension mounting blocks 330 are trapezoidal in shape. Each extension mounting block 330 can be provided with at least one fourth mounting hole 320. The extension mounting blocks 330 can further reduce the weight of the connecting plate 30 and meet the lightweight requirements of the wheelset 40.

[0067] In one embodiment, a second gasket 350 is sleeved on the second connector 310. The second gasket 350 is located between the flexible plate 20 and the connecting plate 30 and abuts against the flexible plate 20 and the connecting plate 30 respectively.

[0068] The second connector 310 may be, but is not limited to, bolts. A second washer 350 is fitted on the second connector 310. The second washer 350 is located between the flexible plate 20 and the connecting plate 30 and abuts against the flexible plate 20 and the connecting plate 30 respectively, so as to play a buffering role.

[0069] In one embodiment, both the first shim 230 and the second shim 350 can be made of rubber blocks, which can provide a buffering effect for the installation between the shaft end spline 10, the flexible plate 20 and the connecting plate 30, and can also provide vibration isolation.

[0070] The flexible plate 20 is made of carbon fiber, which can effectively reduce the weight of the axle-end transmission device 440 and meet the requirements of lightweighting. The flexible plate 20 is used in the axle-end transmission device 440 to control the radial, axial and torsional stiffness, ensuring the structural torque transmission capacity while achieving axial load decoupling, effectively reducing the impact of wheel 420 vibration on axle performance.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shaft-end transmission device, characterized in that, include: A shaft end spline has a connecting hole for inserting a mandrel. The shaft end spline includes a connecting end and an extension end. The diameter of the connecting end is larger than the diameter of the extension end. The connecting hole passes through the connecting end and the extension end. The connecting end has a plurality of first mounting holes. A flexible plate, wherein the shaft end spline is connected to the flexible plate via a first connector, and the flexible plate is provided with a plurality of second mounting holes corresponding to the first mounting holes. The first connector is a threaded connector, and the flexible plate is connected to the shaft end spline by passing through the threaded connector sequentially through the first mounting holes and the second mounting holes. The connecting plate is connected to the flexible plate at one end via a second connector and to the wheel at the other end via a third connector.

2. The shaft-end transmission device according to claim 1, characterized in that, The connecting hole is provided with internal key teeth for engaging with external key teeth at the end of the mandrel.

3. The shaft-end transmission device according to claim 1, characterized in that, A first washer is fitted onto the first connector. The first washer is located between the shaft end spline and the flexible plate and abuts against the shaft end spline and the flexible plate respectively.

4. The shaft-end transmission device according to claim 1, characterized in that, The flexible plate is also provided with a plurality of third mounting holes, and the connecting plate is provided with a plurality of fourth mounting holes corresponding to the third mounting holes; The second connector is a threaded connector, and the flexible plate is connected to the connecting plate by passing through the threaded connector sequentially through the third mounting hole and the fourth mounting hole.

5. The shaft-end transmission device according to claim 4, characterized in that, The outer periphery of the connecting plate is provided with a plurality of extended mounting blocks, and the fourth mounting hole is opened on the extended mounting block; The connecting plate is also provided with a plurality of fifth mounting holes. The third connecting member is a threaded connecting member. The connecting plate is connected to the wheel by passing through the threaded connecting member through the fifth mounting holes and the mounting holes on the wheel.

6. The shaft-end transmission device according to claim 5, characterized in that, The extension mounting blocks are evenly spaced along the outer circumference of the connecting plate.

7. The shaft-end transmission device according to claim 4, characterized in that, A second gasket is fitted onto the second connector. The second gasket is located between the flexible plate and the connecting plate and abuts against the flexible plate and the connecting plate respectively.

8. A wheelset, characterized in that, include: The spindle has shaft end transmission devices as described in any one of claims 1-7 at both ends; A wheel, with one end of the axle-end transmission device connected to the wheel; A bushing is fitted over the spindle, and both ends of the bushing are connected to the wheel via bearings.

9. A bogie, characterized in that, include: Framework; The wheelset as claimed in claim 8, wherein the wheelset is mounted on the frame.

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