Braking structure of rack and pinion car driving system and rack and pinion car

Abstract

The present invention provides a braking structure for a rack vehicle drive system, which includes an axle, a gearbox frame, an eccentric mechanism, a rack wheel, a braking mechanism, and an adjusting mechanism; the gearbox frame and the eccentric mechanism are mounted on the axle; the rack wheel is mounted on the eccentric mechanism; the braking mechanism includes a brake hub, a brake band, and a driving device, the brake hub is mounted on the rack wheel, and the brake band is arranged around the brake hub; the output end of the driving device is connected to the brake band to drive the brake band to tighten or loosen the brake hub; the adjusting mechanism includes a bracket and a connecting piece, the bracket can be rotatably mounted on the gearbox frame, and the bracket is connected to the output end of the driving device; the connecting piece is respectively connected to the eccentric mechanism and the bracket, so that when the eccentric mechanism is rotated and adjusted, the bracket is driven to rotate to adjust the position of the brake band. At the same time, a rack vehicle is also provided. Compared with the prior art, the braking structure of the rack vehicle drive system and the rack vehicle provided by the present invention can better ensure the braking performance of the braking mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of rail transit vehicles, and in particular to a braking structure of a rack rail vehicle driving system and a rack rail vehicle. Background Art

[0002] Currently, rack and pinion vehicles, a new rail transit mode in China, are only used sparingly in a few tourist attractions, and the various system technologies are still in the development and improvement stages. Due to the characteristics of rack and pinion transmission, the meshing of the two gears has strict center-to-center distance requirements. As wheels gradually wear with use, the meshing height between the rack and the gear will also change. As the core component of the rack and pinion drive system, how to adapt the height of each system as the wheels wear becomes a key issue that needs to be addressed.

[0003] In the prior art, rack-and-rail vehicle drive systems typically incorporate an eccentric mechanism connected to the rack wheel. When the wheel wears, the eccentric mechanism can adaptively adjust the rack wheel's height, thereby ensuring stable engagement between the rack wheel and the rack. Structures such as those disclosed in CN109532888A, CN111762210A, and CN110450811A all enable rack wheel height adjustment.

[0004] However, in the prior art, although the height of the rack wheel can be adjusted by the eccentric mechanism, the relative position between the brake mechanism and the rack wheel in the rack vehicle drive system will also change after the rack wheel height is adjusted, thereby affecting the braking force applied by the brake mechanism to the rack wheel and affecting the braking performance of the brake mechanism. Summary of the Invention

[0005] In response to the technical problem in the prior art that the relative position between the rack wheel and the brake mechanism changes after the rack wheel height is adjusted, affecting the braking performance of the brake mechanism, the present invention provides a brake structure for a rack vehicle drive system. This structure not only solves the problem of the meshing of the rack wheel and the rack being affected by wheel wear, but also solves the problem of adjusting the appropriate working position of the brake mechanism after the rack wheel height is adjusted, thereby better ensuring the braking performance of the brake mechanism.

[0006] A braking structure of a rack vehicle driving system, comprising an axle, a gear box frame, an eccentric mechanism, a rack wheel, a braking mechanism and an adjusting mechanism;

[0007] The gearbox frame and the eccentric mechanism are mounted on the axle;

[0008] The rack wheel is mounted on the eccentric mechanism;

[0009] The braking mechanism includes a brake hub, a brake band, and a driving device. The brake hub is mounted on the rack wheel, and the brake band surrounds the brake hub. The output end of the driving device is connected to the brake band to drive the brake band to tighten or loosen the brake hub.

[0010] The adjustment mechanism includes a bracket and a connecting piece. The bracket can be rotatably mounted on the gear box frame, and the bracket is connected to the output end of the driving device; the connecting piece is respectively connected to the eccentric mechanism and the bracket, so as to drive the bracket to rotate when the eccentric mechanism is rotated for adjustment, so as to adjust the position of the brake band.

[0011] Preferably, the driving device includes a driving device body, a brake rod, and a connecting frame;

[0012] The driving device body is mounted on the gear box frame;

[0013] The brake rod is mounted on the output end of the driving device body;

[0014] The connecting frame is connected to the brake rod;

[0015] The brake belt and the bracket are respectively connected to the connecting frame.

[0016] Preferably, the driving device further includes a reset member, which is connected to the brake rod to drive the brake rod to reset.

[0017] Preferably, the bracket includes a bracket body and a bracket connecting frame;

[0018] One end of the bracket body is rotatably connected to the gear box frame;

[0019] One end of the bracket connecting frame is connected to the bracket body, and the other end is rotatably connected to the connecting frame;

[0020] One end of the connecting member is connected to the eccentric mechanism, and the other end is rotatably connected to the other end of the bracket body.

[0021] Preferably, the bracket body is rotatably connected to the gear box frame via a bracket rotating shaft;

[0022] The bracket connecting frame is rotatably connected to the connecting frame through a support shaft.

[0023] Preferably, the connecting member is connected to the eccentric mechanism via a connecting seat, and the connecting member and the connecting seat are rotatably connected.

[0024] Preferably, it further comprises a limiting plate, the limiting plate is connected to the eccentric mechanism, and the limiting plate is provided with a plurality of first positioning holes corresponding to different height positions of the rack wheel;

[0025] The gear box frame is provided with a second positioning hole corresponding to the first positioning hole;

[0026] The first positioning hole is used to cooperate with the second positioning hole to limit the position of the eccentric mechanism.

[0027] Preferably, it further comprises an adjusting screw, wherein the adjusting screw is connected to the limiting plate, and the adjusting screw is used to cooperate with the adjusting nut to lock the eccentric mechanism to the gear box frame.

[0028] Preferably, the gearbox frame and the eccentric mechanism are mounted on the axle via support bearings.

[0029] A rack rail vehicle comprises the braking structure of the rack rail vehicle drive system as described in any one of the above.

[0030] Compared with the prior art, the braking structure of the rack rail vehicle drive system provided by the present invention includes an axle, a gearbox frame, an eccentric mechanism, a rack wheel, a braking mechanism and an adjusting mechanism; the gearbox frame and the eccentric mechanism are installed on the axle; the rack wheel is installed on the eccentric mechanism; the braking mechanism includes a brake hub, a brake belt and a driving device, the brake hub is installed on the rack wheel, and the brake belt is arranged around the brake hub; the output end of the driving device is connected to the brake belt to drive the brake belt to tighten or loosen the brake hub; the adjusting mechanism includes a bracket and a connecting piece, the bracket can be rotatably installed on the gearbox frame, and the bracket is connected to the output end of the driving device; the connecting piece is respectively connected to the eccentric mechanism and the bracket, so as to drive the bracket to rotate when the eccentric mechanism is rotated and adjusted, so as to adjust the position of the brake belt. The adjusting mechanism is provided in the braking structure of the rack vehicle drive system, so that when the rack wheel is adjusted by the eccentric mechanism, the eccentric mechanism will synchronously drive the adjusting mechanism to move, and the movement of the adjusting mechanism will synchronously drive the brake band to move, so as to adaptively adjust the position of the brake band, so that the relative position size of the common center of the brake band and the brake hub and the brake fulcrum remains unchanged, thereby better ensuring the braking performance of the brake mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0032] Figure 1A front view of a brake structure of a rack rail vehicle drive system provided in one embodiment;

[0033] Figure 2 for Figure 1 A cross-sectional view of the braking structure of the rack rail vehicle drive system;

[0034] Figure 3 for Figure 1 Schematic diagram of the positional relationship of the braking structure of the rack rail vehicle drive system. DETAILED DESCRIPTION

[0035] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0036] It should be noted that when a component is referred to as being “fixed on”, “mounted on” or “set on” another component, it can be directly on the other component or indirectly set on the other component; when a component is “connected” to another component, or a component is referred to as being “connected to” another component, it can be directly connected to the other component or indirectly connected to the other component.

[0037] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0039] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0040] The present invention provides a braking structure of a rack rail vehicle drive system, which includes an axle, a gearbox frame, an eccentric mechanism, a rack wheel, a braking mechanism and an adjusting mechanism; the gearbox frame and the eccentric mechanism are installed on the axle; the rack wheel is installed on the eccentric mechanism; the braking mechanism includes a brake hub, a brake belt and a driving device, the brake hub is installed on the rack wheel, and the brake belt is arranged around the brake hub; the output end of the driving device is connected to the brake belt to drive the brake belt to tighten or loosen the brake hub; the adjusting mechanism includes a bracket and a connecting piece, the bracket can be rotatably installed on the gearbox frame, and the bracket is connected to the output end of the driving device; the connecting piece is respectively connected to the eccentric mechanism and the bracket, so as to drive the bracket to rotate when the eccentric mechanism is rotated and adjusted, so as to adjust the position of the brake belt. The adjusting mechanism is provided in the braking structure of the rack vehicle drive system, so that when the rack wheel is adjusted by the eccentric mechanism, the eccentric mechanism will synchronously drive the adjusting mechanism to move, and the movement of the adjusting mechanism will synchronously drive the brake band to move, so as to adaptively adjust the position of the brake band, so that the relative position size of the common center of the brake band and the brake hub and the brake fulcrum remains unchanged, thereby better ensuring the braking performance of the brake mechanism.

[0041] Please refer to Figure 1 and Figure 2 This embodiment provides a braking structure 100 of a rack vehicle driving system, which is applied to a rack vehicle to solve the problem that the meshing height between the rack wheel and the rack changes due to wheel wear, affecting the transmission effect of traction and braking force.

[0042] The braking structure 100 of the rack vehicle drive system includes an axle 10, a gearbox frame 20, an eccentric mechanism 30, a rack wheel 40, a braking mechanism 50, and an adjustment mechanism 60. The gearbox frame 20 and the eccentric mechanism 30 are mounted on the axle 10, and the rack wheel 40 is mounted on the eccentric mechanism 30. The eccentric mechanism 30 can adjust the position of the rack wheel 40. The eccentric mechanism 30 can adopt any conventional adjustment mechanism for adjusting the rack wheel 40. This is well known to those skilled in the art and is not a specific improvement of this embodiment, so it will not be described in detail here.

[0043] The brake mechanism 50 includes a brake hub 51, a brake band 52, and a drive device 53. The brake hub 51 is mounted on the rack wheel 40, and the brake band 52 surrounds the brake hub 51. The output end of the drive device 53 is connected to the brake band 52 to drive the brake band 52 to tighten or loosen the brake hub 51. In other words, in this embodiment, the brake mechanism 50 is a band brake mechanism that brakes the rack wheel 40 by controlling the contraction of the brake band 52 surrounding the brake hub 51.

[0044] In this embodiment, the driving device 53 is mounted on the gear box frame 20. Of course, in other embodiments, the driving device 53 can also be mounted on other frame structures of the rack vehicle, as long as the driving device 53 is stably mounted.

[0045] The adjustment mechanism 60 includes a bracket 61 and a connector 62. The bracket 61 is rotatably mounted on the gearbox frame 20 and connected to the output end of the drive device 53. Specifically, the bracket 61 is mounted on the gearbox frame 20 and is rotatable relative to the gearbox frame 20. The connector 62 is connected to the eccentric mechanism 30 and the bracket 61, respectively. When the eccentric mechanism 30 is rotated and adjusted, the bracket 61 is driven to rotate, thereby adjusting the position of the brake band 52. Specifically, the connector 62 is connected between the eccentric mechanism 30 and the bracket 61. When the eccentric mechanism 30 rotates and adjusts the rack wheel 40, the eccentric mechanism 30 simultaneously drives the connector 62 to move, causing the connector 62 to apply force to the bracket 61, driving the bracket 61 to rotate. Ultimately, the rotation of the bracket 61 adjusts the position of the brake band 52. That is to say, in this embodiment, the adjustment mechanism 60 is provided to enable the brake belt 52 to be linked with the eccentric mechanism 30. When the eccentric mechanism 30 adjusts the movement of the rack wheel 40, thereby driving the brake hub 51 to move, the brake belt 52 will also move accordingly under the drive of the adjustment mechanism 60, thereby ensuring the relative position relationship between the brake belt 52 and the brake hub 51, and ensuring the braking effect of the brake belt 52 on the brake hub 51.

[0046] It is understandable that in the rack rail vehicle of the prior art, although the eccentric mechanism can achieve adaptive adjustment of the rack wheel height, after the rack wheel height is adjusted, the brake hub will move together with the rack wheel, while the brake belt remains in its original position, thereby changing the relative position relationship between the brake belt and the brake hub, affecting the application of the braking force of the brake belt on the brake hub, and affecting the braking performance of the braking mechanism.

[0047] In the braking mechanism 100 of the rack vehicle drive system provided in this embodiment, the adjusting mechanism 60 is provided, so that the position of the brake band 52 can be adaptively and synchronously adjusted through the adjusting mechanism 60, thereby ensuring the relative position relationship between the brake band 52 and the brake hub 51. After the eccentric mechanism 30 adjusts the rack wheel 40, it will not affect the application of the braking force of the brake band 52 on the brake hub 51, thereby ensuring the braking performance of the braking mechanism 50.

[0048] Moreover, in this embodiment, the adjustment mechanism 60 includes the bracket 61 and the connector 62, and the bracket 61 can be rotatably connected to the gear box frame 20, which can make the overall structure transmission more stable, and at the same time, the structure is simple and easy to process, manufacture and install.

[0049] Preferably, the drive device 53 includes a drive device body 531, a brake rod 532, and a connecting frame 533. The drive device body 531 is mounted on the gearbox frame 20, the brake rod 532 is mounted at the output end of the drive device body 531, and the connecting frame 533 is connected to the brake rod 532. The brake band 52 and the bracket 61 are respectively connected to the connecting frame 533. In this embodiment, the drive device body 531 applies a driving force to the brake rod 532, thereby driving the connecting frame 533 to move. This, in turn, drives the brake band 52 through the connecting frame 533 to brake the brake hub 51. When the eccentric mechanism 30 is adjusted, the bracket 61 also drives the connecting frame 533 to move, thereby adjusting the position of the brake band 52. This structure effectively prevents interference between the drive device body 531 and the adjustment mechanism 60, thereby ensuring the proper driving and adjustment of the brake band 52.

[0050] In this embodiment, the driving device body 531 is a brake cylinder, and its specific power source can adopt different driving forms such as electric drive and hydraulic drive.

[0051] Preferably, the driving device 53 further includes a reset member 534, which is connected to the brake rod 532 and is used to reset the brake rod 532. Therefore, when the driving device 53 releases force, the reset member 534 can provide a restoring force to reset the corresponding components of the brake mechanism 50. Specifically, in this embodiment, the reset member 534 is a spring.

[0052] Preferably, the bracket 61 includes a bracket body 611 and a bracket connecting frame 612. One end of the bracket body 611 is rotatably connected to the gearbox frame 20. One end of the bracket connecting frame 612 is connected to the bracket body 611, and the other end of the bracket connecting frame 612 is rotatably connected to the connecting frame 533. One end of the connecting member 62 is connected to the eccentric mechanism 30, and the other end of the connecting member 62 is rotatably connected to the other end of the bracket body 611. Therefore, through this structure, the connecting member 62 can better drive the bracket 61 to rotate, and the bracket 61 can also better drive the connecting frame 533 to move, further ensuring the relative position relationship between the brake band 52 and the brake hub 51 after the eccentric mechanism 30 is adjusted.

[0053] Preferably, the bracket body 611 is rotatably connected to the gearbox frame 20 via a bracket rotating shaft 613, and the bracket connecting frame 612 is rotatably connected to the connecting frame 533 via a support shaft 614. This structure better ensures the connection reliability between the bracket body 611 and the gearbox frame 20, and between the bracket connecting frame 612 and the connecting frame 533.

[0054] Preferably, the connecting member 62 is connected to the eccentric mechanism 30 via a connecting seat 63, and the connecting member 62 is rotatably connected to the connecting seat 63. Through this structure, the connection reliability between the connecting member 62 and the eccentric mechanism 30 is better guaranteed.

[0055] Preferably, the brake structure 100 of the rack vehicle drive system further includes a limit plate 70, which is connected to the eccentric mechanism 30 and is provided with a plurality of first positioning holes 71 corresponding to different height positions of the rack wheel 40. The gearbox frame 20 is provided with second positioning holes 21 corresponding to the first positioning holes 71. The first positioning holes 71 are used to cooperate with the second positioning holes 21 to limit the position of the eccentric mechanism 30.

[0056] After the height of the rack wheel 40 is adjusted into place, the first positioning hole 71 on the limit plate 70 and the second positioning hole 21 on the gear box frame 20 can be accurately aligned. At this time, a positioning pin is inserted into the aligned first positioning hole 71 and the second positioning hole 21, thereby preventing them from falling off and loosening, and determining the position of the eccentric mechanism 30.

[0057] Preferably, the braking structure 100 of the rack rail vehicle drive system further includes an adjusting screw 80 , which is connected to the limit plate 70 . The adjusting screw 80 is used to cooperate with an adjusting nut 90 to lock the eccentric mechanism 30 to the gear box frame 20 .

[0058] After the height of the rack wheel 40 is adjusted to the right position, the adjusting nut 90 is screwed, and the relative position of the limit plate 70 and the gear box frame 20 can be fixed through the cooperation between the adjusting nut 90 and the adjusting screw 80, thereby locking the eccentric mechanism 30.

[0059] Preferably, the gearbox frame 20 and the eccentric mechanism 30 are mounted on the axle 10 via support bearings 91 , thereby better avoiding wear between the gearbox frame 20 , the eccentric mechanism 30 and the axle 10 and better improving the service life.

[0060] Please refer to Figure 3 When the center height of the rack wheel 40 is adjusted, the rack wheel 40 rotates with the eccentric mechanism 30 around the center of the axle 10, thereby achieving the center height adjustment of the rack wheel 40; at the same time, the connecting member 62 adjusts its position along with the eccentric mechanism 30 via the connecting seat 63, thereby driving the bracket 61 to rotate around the bracket rotating shaft 613. The support shaft 614 and one end of the brake band 52 rotate along with the bracket 61, so that the relative position and size of the common center of the brake hub 51 and the brake band 52 and the brake fulcrum remain unchanged. That is, when the height is adjusted, the three horizontal relative distances L0, L1, and L2 remain unchanged, and the two vertical relative distances H1 and H2 also remain unchanged, thereby ensuring good braking performance of the brake mechanism 60.

[0061] At the same time, this embodiment also provides a rack rail vehicle, which includes the braking structure 100 of the rack rail vehicle driving system.

[0062] The above description is only an embodiment of the present invention. It should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present invention, but these improvements all fall within the scope of protection of the present invention.

Claims

1. A braking structure of a rack rail vehicle drive system, characterized in that: It includes an axle, a gearbox frame, an eccentric mechanism, a rack wheel, a brake mechanism and an adjustment mechanism; The gearbox frame and the eccentric mechanism are mounted on the axle; The rack wheel is mounted on the eccentric mechanism; The braking mechanism includes a brake hub, a brake band, and a driving device. The brake hub is mounted on the rack wheel, and the brake band surrounds the brake hub. The output end of the driving device is connected to the brake band to drive the brake band to tighten or loosen the brake hub. The adjustment mechanism includes a bracket and a connecting piece. The bracket is rotatably mounted on the gear box frame and is connected to the output end of the driving device. The connecting piece is respectively connected to the eccentric mechanism and the bracket, so that when the eccentric mechanism is rotated for adjustment, the bracket is driven to rotate to adjust the position of the brake band. The driving device includes a driving device body, a brake rod, and a connecting frame; The driving device body is mounted on the gear box frame; The brake rod is mounted on the output end of the driving device body; The connecting frame is connected to the brake rod; The brake belt and the bracket are respectively connected to the connecting frame; The bracket includes a bracket body and a bracket connecting frame; One end of the bracket body is rotatably connected to the gear box frame; One end of the bracket connecting frame is connected to the bracket body, and the other end is rotatably connected to the connecting frame; One end of the connecting member is connected to the eccentric mechanism, and the other end is rotatably connected to the other end of the bracket body.

2. The braking structure of the rack railway vehicle driving system according to claim 1, characterized in that: The driving device further comprises a reset member, which is connected to the brake rod and is used to drive the brake rod to reset.

3. The braking structure of the rack rail vehicle driving system according to claim 1, characterized in that: The bracket body is rotatably connected to the gear box frame via a bracket rotating shaft; The bracket connecting frame is rotatably connected to the connecting frame through a support shaft.

4. The braking structure of the rack rail vehicle driving system according to claim 1, characterized in that: The connecting member is connected to the eccentric mechanism via a connecting seat, and the connecting member and the connecting seat are rotatably connected.

5. The braking structure of the rack vehicle driving system according to any one of claims 1 to 4, characterized in that: It also includes a limit plate, the limit plate is connected to the eccentric mechanism, and the limit plate is provided with a plurality of first positioning holes corresponding to different height positions of the rack wheel; The gear box frame is provided with a second positioning hole corresponding to the first positioning hole; The first positioning hole is used to cooperate with the second positioning hole to limit the position of the eccentric mechanism.

6. The braking structure of the rack rail vehicle driving system according to claim 5, characterized in that: It also includes an adjusting screw connected to the limiting plate, and the adjusting screw is used to cooperate with the adjusting nut to lock the eccentric mechanism to the gear box frame.

7. The braking structure of the rack railway vehicle driving system according to claim 1, characterized in that: The gear box frame and the eccentric mechanism are mounted on the axle via support bearings.

8. A rack rail vehicle, characterized in that: A brake structure comprising the rack rail vehicle drive system according to any one of claims 1 to 7.

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