Built-in steerable wheel self-resetting device

Abstract

According to the built-in steerable wheel self-resetting device, the two reset springs in the horizontal direction are arranged on the middle rotating block and located on the two sides of the slewing center of the slewing bearing respectively, when the middle rotating block and the upper fixing block rotate along with a vehicle frame, the reset spring on one side can be compressed, and the self-resetting effect is achieved. After steering is completed, the compressed reset spring drives the lower rotating disc of the slewing bearing and the wheel set to return to the original position, and built-in steering reset between the independent wheel set and the frame is achieved. According to the technical scheme, all the reset structures are arranged between the wheel reversing frame and the frame and located in the inner cavity of the slewing bearing, it is guaranteed that the slewing reset device is separated from the external environment in the using process, the probability that the slewing reset device is damaged by the external environment is effectively reduced, and the slewing reset device is particularly suitable for scenes with complex operation environments.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of railway vehicle, concretely is a built-in reversible wheel self-resetting device. BACKGROUND

[0002] Now more and more heavy load metallurgical vehicles have the demand of operating in small radius turning track. The fixed wheel cannot meet the small radius turning demand, so the wheel set with slewing bearing is installed on the frame to realize the independent turning of wheel set. For example, the patent with the application number CN218892550U discloses a reversible walking driving structure of a new energy railway vehicle being used by the applicant, which is provided with a slewing bearing 8 fixedly connected on the top of a small balance frame 4, the inner ring of the slewing bearing 8 is connected with the frame, the walking driving mechanism is connected with the frame through the slewing bearing, when the walking driving mechanism senses the curve of the track, the walking driving mechanism can rotate around the slewing bearing to complete the turning, and the walking driving mechanism that turns first can drive the other walking driving mechanism to turn synchronously through the synchronous rod 2 to realize the synchronous movement. However, the slewing bearing is added to make the wheel freely rotate, and usually to reduce the driving resistance, the wheel rim must have a gap with the track, which can make the wheel swing left and right due to the free rotation of the slewing bearing. In addition, the foreign matters such as steel slag remaining on the track can even knock the wheel to more than 90 degrees of deflection, thereby causing the vehicle to derail, get stuck, and the wheel set to be damaged. Therefore, an additional limiting device is needed to ensure that the wheel does not abnormally deflect, and a stable force is needed to make the wheel set return and keep the stable driving. Most of the prior art adopts the mode of externally mounting a spring and arranging two groups of wheel sets coaxially and connecting rods to constrain the two groups of wheel sets to reset by the spring force and mutual force.

[0003] However, the railway vehicle of the applicant is mostly the operation vehicle in the process of metallurgical operation, such as slag tank car, molten steel car and the like. The operation environment of the metallurgical operation vehicle is complex, and the externally mounted spring reset device not only occupies the outer space of the wheel set, but also is easily burned by the molten material overflowing during transportation. SUMMARY

[0004] In order to solve the problem that the existing externally mounted wheel set slewing reset structure has a high probability of being damaged by external environment, the utility model provides a built-in reversible wheel self-resetting device, which can realize the built-in turning reset between a single wheel set and a frame, and effectively reduce the probability of damage caused by environmental factors.

[0005] The structure of the utility model is as follows: a built-in reversible wheel self-resetting device, characterized by comprising: an upper fixed block, a middle rotating block and a lower fixed block.

[0006] The upper fixing block is fixedly connected below the vehicle frame, and the lower fixing block is fixed on the wheel set rotary frame; the lower fixing block is positioned in the inner cavity of the rotary support, and the middle rotating block is arranged between the upper fixing block and the wheel set rotary frame; the middle rotating block and the upper fixing block are connected through a rotating drive structure, so that the middle rotating block and the upper fixing block rotate synchronously;

[0007] The middle rotating block is connected with the lower fixing block through a reset elastic member;

[0008] The reset elastic member comprises a guide screw one, a reset spring and a guide screw two;

[0009] Two horizontal reset springs are arranged at positions on the middle rotating block which are located on both sides of the rotary center of the rotary support;

[0010] The middle rotating block comprises a T-shaped rotating block body, the rotating block body is horizontally arranged, and one guide screw one is arranged on the T-shaped horizontal rod of the rotating block body at a position on both sides of the vertical rod;

[0011] The guide screw two is installed on the lower fixing block; in the straight running state, the guide screw one and the guide screw two are coaxially arranged;

[0012] One end of the reset spring is sleeved on the guide screw one, and the other end is sleeved on the guide screw two.

[0013] Further features are:

[0014] The rotary support comprises a rotary support inner ring and a rotary support outer ring, the rotary support inner ring is located in the inner cavity of the rotary support outer ring, the rotary support inner ring is connected with the vehicle frame above, and the rotary support outer ring is connected with the wheel set rotary frame below;

[0015] The middle rotating block further comprises a limiting hole, the limiting hole is a vertical rectangular hole arranged on the T-shaped vertical rod of the rotating block body;

[0016] The upper fixing block comprises an upper fixing block body and a limiting column;

[0017] The upper fixing block body is connected with the vehicle frame through bolts, the limiting column has a rectangular cross section, and the size of the rectangular cross section is adapted to the limiting hole; the limiting column is inserted into the limiting hole from top to bottom to form the rotating drive structure;

[0018] The limiting column is coincident with the axis of the rotary shaft of the rotary support;

[0019] The shape of the lower fixing block comprises an arc shape, a rectangular shape or an L shape;

[0020] The lower fixed blocks are symmetrically arranged on both sides of the rotation center of the slewing bearing, and are located on both sides of the T-shaped vertical rod of the rotating block body;

[0021] The lower fixed block comprises a lower fixed block body and a guide screw two;

[0022] The lower fixed block body is connected to the upper side of the wheel group slewing frame by screws, and the lower fixed block body is L-shaped, and the guide screw two is arranged on the horizontal rod of the L-shaped structure; the reset elastic member is composed of the guide screw one, the reset spring and the guide screw two; one end of the reset spring is sleeved on the guide screw one, and the other end is sleeved on the guide screw two;

[0023] It also comprises a rotation limiting structure;

[0024] The rotation limiting structure comprises a limiting straight surface and a limiting inclined surface; the limiting inclined surface is arranged at the position adjacent to the lower fixed block body and the middle rotating block, and the limiting straight surface is arranged at the position adjacent to the lower fixed block on both sides of the T-shaped vertical rod of the rotating block body.

[0025] The self-resetting device for the built-in steerable wheel comprises a rotating block body, a rotating block, a lower fixed block, a guide screw one, a reset spring, a guide screw two and a rotating limiting structure; the rotating block body is arranged on the rotating center of the slewing bearing; the rotating block is arranged on the T-shaped vertical rod of the rotating block body; the lower fixed block is arranged on the lower side of the wheel group slewing frame; the guide screw one is arranged on the middle rotating block; the reset spring is arranged on the guide screw one and the guide screw two; the guide screw two is arranged on the lower fixed block; the rotating limiting structure is arranged on the lower fixed block body and the middle rotating block. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 Fig. 1 is a three-dimensional structural schematic view of the built-in self-resetting device for the steerable wheel; Fig. 1a is a schematic view after the overall structure is installed; Fig. 1b is a structural schematic view after the slewing bearing is omitted;

[0027] Figure 2 2a is a top view of the self-resetting device of this application; 2b is a schematic diagram of the device in a straight-line state and 2a is a schematic diagram of the device in a turning state.

[0028] Figure 3 This is a schematic diagram of the cross-section along direction AA in section 2a;

[0029] Figure 4 This is a schematic diagram of the structure of 2b after omitting the upper fixing block;

[0030] Figure 5 5a is a schematic diagram of the lower fixing block; 5b is an exploded view of the lower fixing block.

[0031] Figure 6 6a is a schematic diagram of the structure of the central rotating block; 6b is an exploded view of the central rotating block.

[0032] Figure 7 This is a schematic diagram of the overall structure of the upper fixed block. Detailed Implementation

[0033] like Figures 1-7 As shown, this utility model includes a built-in self-resetting device for a steerable wheel, which includes: an upper fixing block 5, a middle rotating block 4 and a lower fixing block 3.

[0034] The slewing bearing 1 includes an outer slewing bearing ring 1.1 and an inner slewing bearing ring 1.2. The inner slewing bearing ring 1.2 is rotatably mounted inside the outer slewing bearing ring 1.1. The inner slewing bearing ring 1.2 is connected to the upper frame (not marked in the figure), and the outer slewing bearing ring 1.1 is connected to the lower wheel assembly slewing frame 2. The slewing bearing 1 enables free rotation between the wheel assembly and the frame.

[0035] The specific structure of the slewing bearing 1 and the connection details between the slewing bearing 1 and the frame and wheel set slewing frame 2 are implemented based on existing technology. In this embodiment, only one wheel is provided in the wheel set. The single wheel 6 is rotatably mounted below the wheel set slewing frame 2 based on the bearing structure. A slewing seat 2.1 is provided on the upper end face of the wheel set slewing frame 2, and the outer ring 1.1 of the slewing bearing is fixedly mounted on the slewing seat 2.1.

[0036] In some railcars, multiple wheels are installed in a wheel set, and the wheels are synchronized with each other via a balance frame. In this case, a slewing bearing 2.1 is installed on top of the balance frame. The built-in self-resetting device for steerable wheels in this application is also applicable to railcar sets based on balance frames.

[0037] The upper fixing block 5 is fixedly connected below the vehicle frame, and the lower fixing block 3 is fixed on the wheel set rotary frame 2; the lower fixing block 3 is positioned in the inner cavity of the rotary support, and the middle rotating block 4 is arranged between the upper fixing block 5 and the wheel set rotary frame 2; the middle rotating block 4 and the upper fixing block 5 are connected through the rotating driving structure, so that the middle rotating block 4 and the upper fixing block 5 are synchronously rotated.

[0038] As shown in Figure 1 and Figure 3 , the upper fixing block 5, the middle rotating block 4 and the lower fixing block 3 in the application are installed between the vehicle frame and the wheel set rotary frame 2 and are located in the inner cavity of the rotary support 1, so as to ensure that the self-resetting device in the application is not damaged by external environment during use.

[0039] The middle rotating block 4 is located on both sides of the rotary center of the rotary support 1, and the middle rotating block is connected with the lower fixing block through the reset elastic member. The specific reset elastic member can be realized based on the structure in the prior art which can achieve the same effect. In the embodiment, the reset elastic member includes a guide screw one 4.2, a reset spring 4.4 and a guide screw two 3.2, that is, two horizontal reset springs 4.4 are arranged on both sides of the middle rotating block 4 through the guide screw one 4.2 and the guide screw two 3.2. Because the reset device in the application is an internal structure, the guide screw one 4.2 and the guide screw two 3.2 are fixedly installed on the middle rotating block 4 and the lower fixing block 3 respectively, and the reset spring 4.4 is movably sleeved on the guide screw one 4.2 and the guide screw two 3.2, so as to ensure that the reset elastic member is convenient to install, and the scheme is more practical.

[0040] When the vehicle runs, the upper fixing block 5 is fixedly connected with the vehicle frame, so the angle is consistent with the vehicle frame, the lower fixing block 3 is fixedly connected with the wheel set rotary frame 2, so the angle of the lower fixing block and the wheel set rotary frame 2 is consistent, and the middle rotating block 4 is arranged in a non-fixed form between the vehicle frame and the wheel set rotary frame 2; when the vehicle turns, the upper fixing block 4 drives the middle rotating block 4 to synchronously rotate through the rotating driving structure, and the middle rotating block 4 is connected with the lower fixing block 3 through two horizontally arranged reset springs 4.4, guide screw one 4.2 and guide screw two 3.2 on both sides of the rotary center of the rotary support 1; when the middle rotating block 4 is driven by the upper fixing block 5 to rotate together with the vehicle frame and relative to the wheel set rotary frame 2, one of the two reset springs 4.4 is deflected and compressed, and the other is deflected and stretched; when the vehicle completes the turning and enters the straight track, the two reset springs 4.4 drive the wheel set rotary frame 2 and the vehicle wheel 6 to restore to the default position with the vehicle frame.

[0041] The specific structure of the lower fixing block 3, the middle rotating block 4 and the upper fixing block 5 can be realized based on the structure which can realize the above functions. In the embodiment, as shown in Figure 6As shown, the middle rotating block 4 comprises: a T-shaped rotating block body 4.1, a first screw hole 4.3 and a limiting hole 4.5.

[0042] The rotating block body 4.1 is horizontally arranged; a first screw hole 4.3 is arranged on the horizontal rod of the T-shaped rotating block body 4.1, and a guiding screw rod 4.2 is arranged in the first screw hole 4.3 for installing the guiding screw rod 4.2; the guiding screw rod 4.2 is parallel to the vertical rod of the T-shaped rotating block body 4.1; the limiting hole 4.5 is a rectangular hole in the vertical direction, which is arranged on the vertical rod of the T-shaped rotating block body 4.1.

[0043] As shown in the figure, Figure 7 The upper fixed block 5 comprises: an upper fixed block body 5.1 and a limiting column 5.2.

[0044] The upper fixed block body 5.1 is connected to the frame by bolts, and the cross section of the limiting column 5.2 is rectangular, which is adapted to the limiting hole 4.5. The limiting column 5.2 is inserted into the limiting hole 4.5 from top to bottom to form a rotating driving structure. When the frame and the wheel group slewing frame 2 rotate relative to each other, the upper fixed block body 5.1 drives the rotating block body 4.1 to rotate synchronously through the limiting column 5.2 and the limiting hole 4.5. Specifically, in order to balance the force of the two return springs 4.4, the limiting column 5.2 is coaxial with the rotating shaft of the slewing bearing 1 during actual installation.

[0045] As shown in the figure, Figure 5 The lower fixed block 3 comprises: a lower fixed block body 3.1 and a second screw hole 3.3.

[0046] The lower fixed block body 3.1 is connected above the wheel group slewing frame 2 by bolts; the lower fixed block body 3.1 is L-shaped, and a guiding screw rod 3.2 is arranged on the horizontal rod of the L-shaped lower fixed block body 3.1; the guiding screw rod 3.2 is installed on the lower fixed block body 3.1 through the second screw hole 3.3; one end of the return spring 4.4 is sleeved on the guiding screw rod 4.2, and the other end is sleeved on the guiding screw rod 3.2.

[0047] Because the middle rotating block 4 and the lower fixed block 3 of the present application are arranged in the inner cavity of the slewing bearing 1, and the circular ring-shaped inner ring 1.2 of the slewing bearing is rotatably arranged in the inner cavity of the outer ring 1.1 of the slewing bearing, the middle rotating block 4 and the lower fixed block 3 are arranged in the inner cavity of the circular ring-shaped inner ring 1.2 of the slewing bearing, which is adapted to the inner cavity of the inner ring 1.2 of the slewing bearing, and the shape of the lower fixed block 3 can be arc-shaped, rectangular or L-shaped.

[0048] In this embodiment, in order to make the installation of the lower fixed block 3 more stable, the shape of the lower fixed block 3 is set as an L-shaped structure, and the L-shaped lower fixed block body 3.1 is fixedly installed on the wheel group slewing frame 2 by a plurality of screws, and the L-shaped structure of the lower fixed block 3 is arranged as an arc-shaped structure adjacent to the inner cavity of the inner ring 1.2 of the slewing bearing.

[0049] The center of the limiting hole 4.5 coincides with the center of the outer ring 1.1 of the slewing bearing; the two lower fixing blocks 3 are mirror-symmetrically installed on both sides of the limiting hole 4.5. The two ends of the return spring 4.4 are respectively fitted onto guide screw 4.2 and guide screw 3.2. Figure 2 As shown in Figure a, in the straight-moving state, guide screw 4.2 and guide screw 3.2 are coaxially arranged, and two return springs 4.4 are parallel to each other on both sides of the rotating block body 4.1 in the same state. This ensures that the two return springs 4.4 experience the same force in the straight-moving state, thereby ensuring that no additional torsional force is generated between the rotating block 4 and the lower fixed block 3 in the straight-moving state. The arrangement of guide screws 4.2 and 3.2 prevents the return springs 4.4 from shifting during use.

[0050] In order to limit the rotation angle between the frame and the wheel assembly slewing frame 2, a rotation limiting structure is also provided in this application;

[0051] The rotation limiting structure includes a limiting straight surface 4.6 and a limiting inclined surface 3.4. The limiting inclined surface 3.4 is located adjacent to the lower fixed block body 3.1 and the middle rotating block 4, and the limiting straight surface 4.6 is located on both sides of the T-shaped vertical rod of the rotating block body 4.1 adjacent to the lower fixed block 3. In this application, the guide screw 1 4.2 and the guide screw 2 3.2 are of equal length, and the length of each guide screw is not less than 1 / 4 of the length of the return spring 4.4 in the unloaded state. By setting the lengths of the two guide screws in conjunction with the rotation limiting structure, it is ensured that the return spring 4.4 will not dislodge from the guide screws during use.

[0052] exist Figure 2 b and Figure 4 In the example shown, a structural diagram illustrates the turning state. It can be seen that spring 4.4 on the left is in a stretched state, while spring 4.4 on the right is in a compressed state. When the T-shaped vertical rod of the rotating block body 4.1 rotates around the limiting hole 4.5, after rotating by an angle α, the limiting straight surface 4.6 engages with the limiting inclined surface 3.4, causing the wheel assembly to reach its rotation limit and cease rotation. The specific limiting angle α is set according to actual needs, and the position and angle of the limiting inclined surface 3.4 are adaptively set based on the limiting angle α. In this embodiment, the limiting angle α is set to 15°.

[0053] The technical scheme of the utility model discloses after using, the upper fixed block 5 body adopts bolt installation on the upper frame, the upper fixed block 5 is equipped with the limit post 5.2, the limit post 5.2 is equipped in the center of the slewing bearing 1.When the frame and the wheel group are connected together through the slewing bearing 1, the limit post 5.2 of the upper fixed block 5 just inserts the limit hole 4.5 of the middle rotating block 4, and both are completely matched. When the vehicle is straight, due to the existence of track and flange gap, the wheel group with slewing bearing can produce unrestricted back and forth deflection in a small range, make the vehicle operation unstable, based on the self-resetting device of the present application has the restoring force, can make the wheel group keep better straight running stability. Meanwhile, when the wheel group appears the trend of large angle deflection relative to the frame because of some track anomaly or the influence of external force, since the upper fixed block 5 limits the rotation of the middle rotating block 4 through the limit post 5.2, and the lower fixed block 3 rotates with the wheel group and can compress the spring 4.4 on one side, when turning to the preset angle, the limit straight surface 4.6 of the middle rotating block 4 and the limit inclined surface 3.4 of the lower fixed block are attached, make the wheel group limit its continuous rotation from the mechanical hard connection level, thereby guaranteeing that the wheel group keeps the preset deflection angle (such as 15 DEG in the embodiment) of the holder, passes the track anomaly or resists the external force, when the track anomaly or external force disappears, the spring 4.4 compressed and stretched by deflection can push the wheel group to return to the center position, thereby guaranteeing the stable operation of the wheel group. The present application is through being built-in a set of reset spring mechanism in the slewing bearing of the wheel group and the frame connection, realizes the built-in type steering reset between the separate wheel group and the frame, also ensures that the built-in type steering reset device is not influenced by external environment, reduces the damage probability, improves the service life. The rotation limit structure formed by the limit straight surface 4.6 and the limit inclined surface 3.4 can guarantee the maximum deflection angle of the wheel group when encountering the track abnormal condition, keep the basic advancing direction, and not lead to derailment, jamming and other situations due to the large deflection of the wheel group.

Claims

1. A built-in self-resetting device for a steerable wheel, characterized in that, It includes: Upper fixed block, middle rotating block, and lower fixed block; The upper fixed block is fixedly connected to the bottom of the frame, and the lower fixed block is fixed to the wheel set slewing frame. The lower fixed block is located in the inner cavity of the slewing bearing, and the middle rotating block is disposed between the upper fixed block and the wheel set slewing frame. The middle rotating block and the upper fixed block are connected by a rotation drive structure so that the middle rotating block and the upper fixed block rotate synchronously. The middle rotating block is connected to the lower fixed block via a reset elastic element; the reset elastic element includes: guide screw one, a reset spring, and guide screw two. Two horizontal return springs are respectively installed on the middle rotating block at the two sides of the rotation center of the slewing bearing; the middle rotating block includes: a T-shaped rotating block body, the rotating block body is horizontally arranged, and a guide screw is respectively installed on the T-shaped horizontal bar of the rotating block body on both sides of the vertical bar, the guide screw is parallel to the T-shaped vertical bar of the rotating block body; The second guide screw is mounted on the lower fixed block; in the straight-line state, the first guide screw and the second guide screw are coaxially arranged; one end of the return spring is fitted onto the first guide screw, and the other end is fitted onto the second guide screw.

2. The built-in self-resetting device for a steerable wheel according to claim 1, characterized in that: The slewing bearing includes an inner slewing bearing ring and an outer slewing bearing ring. The inner slewing bearing ring is located inside the cavity of the outer slewing bearing ring. The inner slewing bearing ring is connected to the upper frame, and the outer slewing bearing ring is connected to the lower wheel set slewing frame.

3. The built-in self-resetting device for a steerable wheel according to claim 1, characterized in that: The rotating block further includes a limiting hole, which is a rectangular hole in the vertical direction and is set on the T-shaped vertical rod of the rotating block body.

4. The built-in self-resetting device for a steerable wheel according to claim 3, characterized in that: The upper fixing block includes: an upper fixing block body and a limiting post; The upper fixing block body is connected to the vehicle frame by bolts. The cross-section of the limiting post is rectangular, and the size of the rectangle is adapted to the limiting hole. The limiting post is inserted into the limiting hole from top to bottom to form the rotary drive structure.

5. The built-in self-resetting device for a steerable wheel according to claim 4, characterized in that: The limiting post coincides with the axis of rotation of the slewing bearing.

6. The built-in self-resetting device for a steerable wheel according to claim 1, characterized in that: The shape of the lower fixing block includes: arc, rectangle or L-shape.

7. The built-in self-resetting device for a steerable wheel according to claim 1, characterized in that: Two lower fixing blocks are provided, which are mirror-symmetrically arranged on both sides of the rotation center of the slewing bearing, respectively located on both sides of the T-shaped vertical rod of the rotating block body.

8. The built-in self-resetting device for a steerable wheel according to claim 1, characterized in that: The lower fixing block includes: a lower fixing block body; The lower fixing block body is connected to the wheel set slewing frame by screws; the lower fixing block body is L-shaped, and the guide screw is provided on the crossbar of the L-shape.

9. The built-in self-resetting device for a steerable wheel according to claim 8, characterized in that: It also includes a rotation limiting structure; The rotation limiting structure includes a limiting straight surface and a limiting inclined surface; the limiting inclined surface is located adjacent to the lower fixed block body and the middle rotating block, and the limiting straight surface is located on both sides of the T-shaped vertical rod of the rotating block body adjacent to the lower fixed block.

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