Catenary maintenance ladder advancing wheel locking mechanism

Abstract

The utility model discloses a catenary maintenance box step advancing wheel locking mechanism which comprises a fixing piece, a locking piece and a locking piece, and a pressing device is arranged in the fixing piece. The locking device is installed in the fixing piece and connected with the pressing device; when the wheel is locked, power is applied to the pressing device, so that the pressing device drives the locking device to move and be inserted into a wheel positioning hole of the wheel. Compared with the defects that a mechanical buckle device is insufficient in clamping force, easy to slip and the like, the locking mechanism has the advantages that the locking device is inserted into the wheel positioning hole, so that the wheel can be locked more stably, the locking reliability is improved, and the stability of the box step in the overhauling operation process is guaranteed.

Description

A contact wire maintenance vehicle ladder travel wheel locking mechanism Technical Field

[0001] This utility model belongs to the field of self-locking technology for maintenance vehicle ladder wheels, specifically relating to a locking mechanism for the traveling wheels of a catenary maintenance vehicle ladder. Background Technology

[0002] With the rapid expansion of railway electrification, the workload of overhead contact line maintenance has increased dramatically. As a critical operating platform, the stability and mobility of overhead contact line maintenance ladders directly affect maintenance efficiency and personnel safety. However, existing locking technologies still face several bottlenecks. Specifically, early maintenance operations relied on manual support of the ladders, typically requiring multiple assistants. This not only wastes human resources but also presents extremely high risks associated with working at heights. Furthermore, manual stabilization is inefficient when the ladders are frequently moved, making it difficult to meet the demands of large-scale maintenance. To replace manual labor, locking devices such as manual pins and mechanical latches have emerged. For example, manual pin locking secures wheels by manually inserting and removing pins, but this is cumbersome and prone to errors. Mechanical latches use springs or levers to clamp the rails, but suffer from insufficient clamping force and slippage. Some patents, such as CN216424150U, employ ratchet transmission and a check valve assembly, using mechanical claws to grip the rails for locking. While this improves reliability, it still requires manual operation of handles, pressing rods, and other components, resulting in low unlocking efficiency. Summary of the Invention

[0003] The purpose of this utility model is to provide a locking mechanism for the traveling wheels of a catenary maintenance vehicle ladder, in order to solve the technical defects of the prior art, such as cumbersome unlocking operation, easy omission, and low unlocking efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A contact wire maintenance vehicle ladder travel wheel locking mechanism includes:

[0006] The fastener has a pressing device inside;

[0007] A locking device is installed in the fixing member and connected to the pressing device;

[0008] When locking the wheel, power is applied to the pressing device, causing the pressing device to move the locking device and insert it into the wheel positioning hole of the wheel.

[0009] Furthermore, the pressing device includes a guide cylinder, which is disposed in the fixing member. The guide cylinder is provided with a movable tooth and a fixed tooth. The fixed tooth is sleeved on the outside of the movable tooth, and the outer wall of the end of the fixed tooth cooperates with the inside of the guide cylinder.

[0010] The locking device includes a locking tongue, one end of which is provided with an energy storage spring and the other end is provided with a return spring. The end of the energy storage spring is connected to the end of the moving tooth away from the fixed tooth, and the end of the locking tongue with the return spring extends to the outside of the guide cylinder.

[0011] Furthermore, the inner wall of the guide cylinder is provided with a guide groove, and the fixed tooth cooperates with the guide groove.

[0012] Furthermore, a first tooth is provided on the outer side of one end of the movable tooth, and a second tooth is provided at the end of the fixed tooth, with the first tooth and the second tooth being movably connected.

[0013] Furthermore, the first tooth includes a hollow annular base and a tooth, the tooth being circumferentially disposed on the annular base, and multiple teeth being spaced apart;

[0014] The second tooth includes an abutting portion and a limiting portion, the limiting portion being symmetrically arranged on the outside of the abutting portion, and a gap between the two abutting portions;

[0015] When the first tooth and the second tooth engage, the abutting part abuts against the annular base, and the tooth is inserted into the gap.

[0016] Furthermore, the teeth are axially aligned with the hollow annular base.

[0017] Furthermore, two spring limiters are provided on the outer side of the locking tongue, and the reset spring is located between the two spring limiters.

[0018] Furthermore, the locking tongue has a columnar structure.

[0019] Furthermore, the cross-section of the latch is annular.

[0020] Furthermore, the fixing element is a fixing tube.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. Compared with the shortcomings of mechanical buckle devices, such as insufficient clamping force and easy slippage, this locking mechanism can lock the wheel more securely by inserting the locking device into the wheel positioning hole, which improves the reliability of locking and ensures the stability of the ladder during maintenance operations.

[0023] 2. The structural design of the pressing and locking devices, through functions such as guiding, energy storage, and reset, improves the reliability, ease of operation, and work efficiency of the contact wire maintenance vehicle ladder's traveling wheel locking mechanism, while ensuring the compactness and stability of the structure.

[0024] 3. The guide groove provides a precise movement path for the fixed teeth. When the pressing device is working, the fixed teeth move along the guide groove, which can ensure that the relative movement between the moving teeth and the fixed teeth is more accurate and stable. This helps to ensure the coordination of the entire pressing device and locking device, so that the locking tongue can be accurately inserted into the wheel positioning hole, improving the locking accuracy and reliability.

[0025] 4. The movable connection between the first and second teeth allows the moving tooth to effectively transmit power to the fixed tooth through the meshing of the teeth when it is pressed. This, in turn, drives the energy storage spring and other components connected to the moving tooth to move, ultimately realizing the extension and locking action of the locking tongue. This tooth meshing transmission method has high transmission accuracy and reliability, ensuring accurate power transmission and guaranteeing the normal operation of the locking mechanism.

[0026] 5. The annular base of the first tooth abuts against the contact part of the second tooth, and the tooth is inserted into the gap. This precise fit provides accurate positioning and guidance for the relative movement between the moving tooth and the fixed tooth. When the pressing device is working, it can ensure that the moving tooth moves along the predetermined trajectory, thereby improving the motion accuracy and reliability of the entire mechanism. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 is a schematic diagram of the operation of the contact wire maintenance vehicle ladder wheel locking mechanism provided by this utility model.

[0029] Figure 2 is a schematic diagram of the assembly of each part in the contact wire maintenance vehicle ladder traveling wheel locking mechanism provided by this utility model.

[0030] The components are: 1. Fixed tube; 2. Guide tube; 3. Moving tooth; 4. Fixed tooth; 5. Energy storage spring; 6. Locking tongue; 7. Spring limit; 8. Return spring; 9. Wheel coupling tube; 10. Wheel; 11. Wheel positioning hole; 12. Support plate. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model 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, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] With the rapid expansion of railway electrification, the workload of overhead contact line maintenance has increased dramatically. As a critical operating platform, the stability and mobility of overhead contact line maintenance ladders directly affect maintenance efficiency and personnel safety. However, existing locking technologies still face several bottlenecks. Specifically, early maintenance operations relied on manual support of the ladders, typically requiring multiple assistants. This not only wastes human resources but also presents extremely high risks associated with working at heights. Furthermore, manual stabilization is inefficient when the ladders are frequently moved, making it difficult to meet the demands of large-scale maintenance. To replace manual labor, locking devices such as manual pins and mechanical latches have emerged. For example, manual pin locking secures wheels by manually inserting and removing pins, but this is cumbersome and prone to errors. Mechanical latches use springs or levers to clamp the rails, but suffer from insufficient clamping force and slippage. Some patents, such as CN216424150U, employ ratchet transmission and a check valve assembly, using mechanical claws to grip the rails for locking. While this improves reliability, it still requires manual operation of handles, pressing rods, and other components, resulting in low unlocking efficiency.

[0037] In order to overcome the above-mentioned technical defects, the inventors have provided a locking mechanism for the traveling wheels of a catenary maintenance vehicle ladder.

[0038] The present invention will now be described in further detail with reference to the accompanying drawings:

[0039] As shown in Figures 1 and 2, this utility model embodiment provides a locking mechanism for the traveling wheels of a catenary maintenance vehicle ladder, including: a fixing component, which is a fixing tube 1, and a pressing device is provided inside it; a locking device, which is installed in the fixing component and connected to the pressing device; wherein, when locking the wheel, power is applied to the pressing device, causing the pressing device to drive the locking device to move and insert into the wheel positioning hole 11 of the wheel.

[0040] Early maintenance operations relied on manual support of the ladder, requiring multiple assistants and wasting human resources. This locking mechanism, however, uses a pressing device to automatically insert the locking device into the wheel positioning hole 11, eliminating the need for multiple assistants and effectively saving manpower. Furthermore, manual stabilization of the ladder is inefficient during frequent movements, making it difficult to meet the needs of large-scale maintenance. This locking mechanism is relatively simple to operate, quickly locking the wheels and improving the ladder's movement efficiency, making it better suited for large-scale maintenance operations. Secondly, existing manual pin locking operations are cumbersome and prone to errors, while mechanical latching devices require manual operation of multiple components. This locking mechanism, installed on the support plate 12 of the wheel coupling tube 9, allows the locking device to move and insert into the wheel positioning hole 11 simply by applying power to the pressing device when the wheel 10 stops rotating. This simplifies operation, reduces operational steps, and lowers operational difficulty and error rates.

[0041] Furthermore, as can be seen from the figure, the pressing device includes a guide cylinder 2, which is disposed in the fixing member. The guide cylinder 2 is provided with a movable tooth 3 and a fixed tooth 4. The fixed tooth 4 is sleeved on the outside of the movable tooth 3, and the outer wall of the end of the fixed tooth 4 is engaged with the inside of the guide cylinder 2. The locking device includes a locking tongue 6, one end of which is provided with an energy storage spring 5, and the other end is sleeved with a return spring 8. The end of the energy storage spring 5 is connected to the end of the movable tooth 3 away from the fixed tooth 4, and the end of the locking tongue 6 sleeved with the return spring 8 extends to the outside of the guide cylinder 2.

[0042] In the above structural connection, the guide cylinder 2 is set in the fixed part, providing a stable installation space and motion guide for the moving tooth 3 and the fixed tooth 4. The moving tooth 3 moves in the guide cylinder 2, which can ensure the accuracy and stability of its motion trajectory. When the pressing device is working, the moving tooth 3 can move in the predetermined direction, thereby accurately transmitting power to the locking device, improving the reliability and accuracy of the entire mechanism.

[0043] The fixed tooth 4 is sleeved on the outside of the movable tooth 3, and the outer wall of the end of the fixed tooth 4 fits with the inside of the guide cylinder 2, so that a relatively stable fit relationship is formed between the movable tooth 3 and the fixed tooth 4. During the pressing process, the fixed tooth 4 can move smoothly relative to the movable tooth 3. At the same time, the fit between the fixed tooth 4 and the guide cylinder 2 limits the range of motion of the fixed tooth 4, preventing it from moving excessively and ensuring the normal operation of the pressing device. One end of the locking tongue 6 is provided with an energy storage spring 5. The end of the energy storage spring 5 is connected to the end of the movable tooth 3 away from the fixed tooth 4. When power is applied to the pressing device, the movable tooth 3 moves and compresses the energy storage spring 5. The energy storage spring 5 stores energy. When the movable tooth 3 moves to a certain position, the energy storage spring 5 releases energy, pushing the locking tongue 6 to move quickly and insert into the wheel positioning hole 11, realizing the rapid locking of the wheel. This can improve the locking speed and force, ensure that the locking tongue 6 can be accurately inserted into the wheel positioning hole 11, and improve the reliability of the locking.

[0044] The other end of the locking tongue 6 is fitted with a return spring 8. When unlocking is required, the elastic force of the return spring 8 can push the locking tongue 6 out of the wheel positioning hole 11, realizing the automatic reset of the locking device. This makes the operation of the locking device more convenient and quick, reduces manual intervention, and improves work efficiency. At the same time, the presence of the return spring 8 also ensures that the locking tongue 6 can return to the initial position after each use, preparing for the next locking and improving the durability and stability of the mechanism.

[0045] In this embodiment, a guide groove is provided on the inner wall of the guide cylinder 2. The fixed tooth 4 cooperates with the guide groove, which provides a precise movement path for the fixed tooth 4. When the pressing device is working, the fixed tooth 4 moves along the guide groove, ensuring that the relative movement between the moving tooth 3 and the fixed tooth 4 is more accurate and stable. This helps to ensure the coordination of the entire pressing device and locking device, allowing the locking tongue 6 to be accurately inserted into the wheel positioning hole 11, thus improving the locking accuracy and reliability. In addition, the cooperation between the fixed tooth 4 and the guide groove increases the structural stability of the pressing device. The guide groove restricts the movement range and direction of the fixed tooth 4, preventing it from deviating or shaking during operation. This stability is crucial for withstanding the forces and vibrations generated by the pressing device during operation, reducing failures and damage caused by structural instability, and extending the service life of the mechanism. The cooperation between the guide groove and the fixed tooth 4 makes the fixed tooth 4 move more smoothly, reducing friction and collision with other components, helping to reduce the wear of the mechanism, reduce noise caused by friction, and improve the working comfort and reliability of the entire mechanism.

[0046] In this embodiment, a first tooth is provided on the outer side of one end of the movable tooth 3, and a second tooth is provided on the end of the fixed tooth 4. The first tooth and the second tooth are movably connected. The first tooth includes a hollow annular base and a tooth. The tooth is circumferentially arranged on the annular base, and multiple teeth are spaced apart. The teeth and the hollow annular base are axially coincident. The second tooth includes an abutting part and a limiting part. The limiting part is symmetrically arranged on the outer side of the abutting part, and there is a gap between the two abutting parts. When the first tooth and the second tooth are engaged, the abutting part abuts against the annular base, and the tooth is inserted into the gap.

[0047] In the above structure, the movable connection between the first tooth and the second tooth allows the fixed tooth 4 to effectively transmit power to the movable tooth 3 through the meshing of the teeth when it is pressed. This, in turn, drives the energy storage spring 5 and other components connected to the movable tooth 3 to move, ultimately realizing the extension and locking action of the locking tongue 6. This tooth meshing transmission method has high transmission accuracy and reliability, ensuring accurate power transmission and guaranteeing the normal operation of the locking mechanism.

[0048] The first tooth adopts a hollow annular base, which increases the connection area between the tooth and the end of the moving tooth 3, improves the connection strength between the tooth and the moving tooth 3, and makes the first tooth less likely to fall off or be damaged under external force, thus enhancing the structural stability of the entire pressing device. The teeth are circumferentially arranged on the annular base, and multiple teeth are spaced apart, allowing each tooth to bear pressure evenly during power transmission, avoiding tooth wear or damage caused by excessive local force, and improving the service life and transmission efficiency of the teeth. The hollow annular base and the circumferentially arranged tooth structure are relatively simple, facilitating manufacturing using conventional processing techniques and reducing processing costs. At the same time, this structure also facilitates positioning and assembly during installation, improving installation efficiency. The annular base of the first tooth abuts against the contact portion of the second tooth, with the tooth inserted into the gap, providing accurate positioning and guidance for the relative movement between the moving tooth 3 and the fixed tooth 4. During operation of the pressing device, this ensures that the fixed tooth 4 moves along a predetermined trajectory, improving the motion accuracy and reliability of the entire mechanism.

[0049] Furthermore, the outer side of the latch 6 is provided with two spring limiters 7, and the return spring 8 is located between the two spring limiters 7. The latch 6 has a columnar structure and the cross-section of the latch 6 is annular.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit its protection scope. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that after reading this utility model, they can still make various changes, modifications or equivalent substitutions to the specific implementation of the utility model, but these changes, modifications or equivalent substitutions are all within the protection scope of the pending claims of the utility model.

Claims

1. A locking mechanism for the traveling wheels of a catenary maintenance vehicle ladder, characterized in that, include: A fixing component is provided with a pressing device inside; a locking device is installed in the fixing component and connected to the pressing device; wherein, when locking the wheel, power is applied to the pressing device, causing the pressing device to drive the locking device to move and insert into the wheel positioning hole (11) of the wheel.

2. The contact wire maintenance vehicle ladder traveling wheel locking mechanism according to claim 1, characterized in that, The pressing device includes a guide cylinder (2), which is disposed in a fixing member. The guide cylinder (2) is provided with a movable tooth (3) and a fixed tooth (4). The fixed tooth (4) is sleeved on the outside of the movable tooth (3), and the outer wall of the end of the fixed tooth (4) cooperates with the inside of the guide cylinder (2). The locking device includes a locking tongue (6). One end of the locking tongue (6) is provided with an energy storage spring (5), and the other end is sleeved with a return spring (8). The end of the energy storage spring (5) is connected to the end of the movable tooth (3) away from the fixed tooth (4). The end of the locking tongue (6) sleeved with the return spring (8) extends to the outside of the guide cylinder (2).

3. The contact wire maintenance vehicle ladder traveling wheel locking mechanism according to claim 2, characterized in that, The inner wall of the guide cylinder (2) is provided with a guide groove, and the fixed tooth (4) cooperates with the guide groove.

4. The contact wire maintenance vehicle ladder traveling wheel locking mechanism according to claim 2, characterized in that, The movable tooth (3) has a first tooth on the outer side of one end, and the fixed tooth (4) has a second tooth on the end. The first tooth and the second tooth are movably connected.

5. The contact wire maintenance vehicle ladder traveling wheel locking mechanism according to claim 4, characterized in that, The first tooth includes a hollow annular base and a tooth, the tooth being circumferentially disposed on the annular base, and multiple teeth being spaced apart; the second tooth includes an abutting portion and a limiting portion, the limiting portion being symmetrically disposed outside the abutting portion, and a gap being between the two abutting portions; wherein, when the first tooth and the second tooth are engaged, the abutting portion abuts against the annular base, and the tooth is inserted into the gap.

6. The contact wire maintenance vehicle ladder traveling wheel locking mechanism according to claim 5, characterized in that, The teeth are axially aligned with the hollow annular base.

7. The contact wire maintenance vehicle ladder traveling wheel locking mechanism according to claim 2, characterized in that, Two spring limiters (7) are provided on the outside of the locking tongue (6), and the reset spring (8) is located between the two spring limiters (7).

8. The contact wire maintenance vehicle ladder traveling wheel locking mechanism according to claim 7, characterized in that, The latch (6) has a columnar structure.

9. The contact wire maintenance vehicle ladder traveling wheel locking mechanism according to claim 7, characterized in that, The cross-section of the latch (6) is annular.

10. The contact wire maintenance vehicle ladder traveling wheel locking mechanism according to claim 1, characterized in that, The fastener is a fixing tube (1).

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