A shaft box tow rope

Abstract

The application relates to the technical field of railway vehicle maintenance, in particular to an axle box towing wheel which comprises a locking support for supporting an axle box and a pulley assembly arranged at the lower side of the locking support. The application has the effect of improving the problem that the axle box is directly contacted with the ground and is easy to be deformed and damaged when the wheel set is removed for maintenance.

Description

Technical Field

[0001] This application relates to the technical field of railway vehicle maintenance, and in particular to an axle box trolley. Background Technology

[0002] Axle boxes are critical connecting components between wheelsets and bogie frames in railway vehicles (such as high-speed trains and subways). They primarily support the wheelsets and transmit vehicle loads, while also providing mounting space and protection for the wheel bearings. Axle boxes typically include bearing assemblies to support wheelset rotation, housings to enclose the bearings, sealing devices to prevent lubrication leakage, and positioning devices to limit lateral / longitudinal movement of the axle box on the bogie, ensuring proper wheelset guidance. The axle boxes are bolted to the bogie frame. The wheelset (wheel + axle) has bearings embedded in the axle boxes at both ends, allowing the wheels to rotate around the axles and transmitting the vehicle's weight (vertical load) and longitudinal / lateral forces (such as braking and impacts during curves) to the bogie and track.

[0003] In related technologies, axle boxes require regular maintenance to check bearing wear and clearance for excessive wear, in order to prevent overheating or jamming. At the same time, flaw detection is needed to check whether the welds or structural components of the box have cracks due to long-term vibration.

[0004] Regarding the aforementioned technologies, if the axle box is not supported by a dedicated bracket after the wheelset is removed, its bottom outer shell, the side of the box near the ground, and the inner bottom surface will directly contact the ground, causing deformation of the box or even damage to internal components. Utility Model Content

[0005] In order to improve the problem that axle boxes are prone to deformation and damage when they come into direct contact with the ground during wheel removal and maintenance, this application provides an axle box trolley.

[0006] The axle box trolley provided in this application adopts the following technical solution: An axle box trolley includes a locking bracket for supporting the axle box and a pulley assembly disposed on the underside of the locking bracket.

[0007] By adopting the above technical solution, the locking bracket serves as the core support structure, directly supporting the bottom outer shell, the side closest to the ground, and the internal bottom surface of the axle box. This allows the entire axle box to be lifted off the ground, preventing rigid contact between the axle box and the ground. This avoids deformation of the box, seal failure, or mechanical damage to internal components caused by high ground hardness, unevenness, or accidental pressure during operation. The pulley assembly allows the axle box to move flexibly. During maintenance, workers can push or pull the pulleys, easily adjusting the axle box position through translation and steering, eliminating the need for manual handling of heavy axle boxes and reducing labor intensity. The rolling characteristics of the pulleys reduce frictional resistance during movement, preventing secondary damage to the axle box or surrounding equipment due to improper dragging, thus improving operational safety and efficiency.

[0008] Furthermore, the locking bracket includes a bracket body, at least two locking plates symmetrically disposed on the upper side of the bracket body for fixing both sides of the axle box, and locking pins disposed on the upper side of the bracket body for correspondingly cooperating with the locking plates.

[0009] By adopting the above technical solution, the locking plates are symmetrically distributed on the upper side of the bracket body, which can form a clamping constraint on the axle box from the front and rear sides. Combined with the insertion and fixing of the locking pin, the limit is achieved, which effectively counteracts the lateral displacement trend of the axle box caused by its own weight or maintenance operations, avoids the risk of sliding caused by uneven force on one side, and improves the fixing reliability compared with the single-sided fixing structure.

[0010] Furthermore, the main body of the bracket includes a mounting base plate and two mounting side plates that are vertically arranged and fixedly connected to the top side of the mounting base plate. The two mounting side plates are symmetrically arranged at the edges of both sides of the mounting base plate. Each of the mounting side plates has a hinge seat on the top edge for mounting the locking plate. The locking pin is located on the side of the mounting side plate away from the hinge seat. The locking plate has a waist-shaped locking groove along the length direction at the end away from the hinge seat for the locking pin to engage. The locking pin has a fastener for cooperating with the locking plate.

[0011] By adopting the above technical solution, the hinge seat on the top side of the mounting plate allows the locking plate to open and close flexibly around the hinge seat. The locking plate can open outward and close inward, and is fixed by the locking pin and the waist-shaped locking groove. The movable structure avoids the need for repeated adjustments to the axle box position required by the fixed locking plate, shortening the axle box assembly and disassembly time and improving maintenance efficiency. The waist-shaped locking groove at the end of the locking plate away from the hinge seat forms a sliding engagement with the locking pin on the mounting side plate. The locking pin can move along the length direction within the waist-shaped groove, thereby adjusting the distance between the locking plate and the mounting base plate (i.e., the lateral support width of the axle box), allowing the towing wheel to adapt to axle boxes of different widths or models. The fasteners on the locking pin can fix the locking plate to the locking pin after adjustment, ensuring the accuracy and stability of the axle box support.

[0012] Furthermore, a U-shaped mounting seat for mounting the locking pin is movably connected to the top surface of the mounting side plate on the side away from the hinge seat, and an abutment plate for the U-shaped mounting seat to abut against is vertically arranged and fixedly connected to the top surface of the mounting side plate.

[0013] By adopting the above technical solution, the U-shaped mounting base is movably connected to the top surface of the mounting side plate, allowing the locking pin to be adjusted within a certain range. When maintaining axle boxes of different widths, operators can adjust the position of the U-shaped mounting base to move the locking pin synchronously along the waist-shaped locking groove, thus adapting to the actual width requirements of the axle box. For wider axle boxes, the U-shaped mounting base can be moved outward to increase the distance between the locking pin and the hinge seat, allowing the locking plate to fully clamp both sides of the axle box. The abutment plate is vertically fixed to the top surface of the mounting side plate and abuts against the U-shaped mounting base, providing rigid support for the U-shaped mounting base, restricting its degree of freedom, and ensuring the fitting accuracy between the locking pin and the waist-shaped locking groove of the locking plate. The abutment plate can transfer part of the weight of the locking pin and the force exerted during operation to the mounting side plate, reducing the stress deformation of the U-shaped mounting base itself and extending its service life.

[0014] Furthermore, the locking plate has an arc-shaped abutment portion for engaging with the outer wall of the axle box and a locking portion for engaging with the locking pin, and the waist-shaped locking groove is formed in the locking portion; When the arc-shaped abutment part abuts against the outer wall of the axle box, the locking part is located on the upper side of the U-shaped mounting seat and the abutment plate.

[0015] By adopting the above technical solution, the outer wall of the axle box is typically an arc-shaped curved surface. The arc-shaped abutment portion of the locking plate closely fits the contour of the axle box's outer wall, increasing the contact area and evenly distributing the clamping force. Compared to a planar abutment structure, the arc-shaped abutment portion effectively avoids scratches or deformation of the axle box's outer wall caused by localized stress concentration. Simultaneously, the curved surface fit enhances friction, preventing the axle box from sliding due to vibration or accidental contact during maintenance, thus improving the reliability of the fixation. When the arc-shaped abutment portion abuts against the axle box's outer wall, the area where the locking part has a waist-shaped locking groove is located on the upper side of the U-shaped mounting base and the abutment plate. This avoids direct contact or spatial interference between the locking pin and the U-shaped mounting base and the abutment plate, ensuring that the locking pin can smoothly slide or be inserted / removed within the waist-shaped locking groove, simplifying the installation and removal of the locking pin.

[0016] Furthermore, the pulley assembly includes a connecting seat fixedly connected to the lower side of the locking bracket and a rolling wheel rotatably connected to the connecting seat.

[0017] By adopting the above technical solution, the rotational characteristics of the rolling wheels allow the towing wheels to roll freely on the ground. Workers can easily move and adjust the axle box position by pushing or pulling, eliminating the need for manual handling of heavy axle boxes. Compared to traditional sliding and dragging methods, rolling movement reduces physical exertion and improves maintenance efficiency when multiple axle box position adjustments are needed or when moving along long maintenance tracks. The contact between the rolling wheels and the ground is through rolling friction, reducing resistance during movement and making the axle box movement smoother. The connecting seat rigidly connects the rolling wheels to the locking bracket, ensuring that the rolling wheels maintain a stable supporting posture during movement, avoiding axle box tilting or vibration caused by swaying or offset, and reducing the risk of secondary damage to internal components such as bearings and seals.

[0018] Furthermore, the connecting seat includes a connecting plate and two symmetrically arranged and vertically fixedly connected to both sides of the connecting plate. The rolling wheel is located between the two connecting plates. The rolling wheel has an axle passing through its axial position. The axle passes through the connecting plates and the rolling wheel. The two ends of the axle are fixedly connected to the two connecting plates respectively. The axle and the rolling wheel are rotatably connected.

[0019] By adopting the above technical solution, two connecting plates are symmetrically distributed on both sides of the connecting plate, evenly transferring the weight of the locking bracket and axle box to the two rolling wheels. Compared with a single-sided support structure, the symmetrical layout avoids deformation of the connecting plates or uneven wear of the rolling wheels due to excessive force on one side, improving the structural stability of the pulley assembly under load and preventing the risk of overturning caused by center of gravity shift. The rolling wheels are rotatably connected to the two connecting plates through axles, allowing the rolling wheels to rotate freely only around the axle axis without radial or axial displacement. This ensures the linear motion trajectory of the rolling wheels when rolling on the ground, preventing the axle box from shifting direction due to rolling wheel wobbling, and enabling the axle box to be precisely adjusted to the target position.

[0020] Furthermore, the mounting side plate has a structural groove in its side wall.

[0021] By adopting the above technical solution, the mounting side plate serves as the main load-bearing structure of the locking bracket. The structural grooves in the side walls reduce the material usage and weight of the mounting side plate without compromising overall strength. The lightweight mounting side plate significantly reduces the overall load on the tow wheel, making wheel movement easier.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The locking bracket achieves axle box fixation and multi-model compatibility through the coordinated use of symmetrical locking plates, waist-shaped locking grooves, U-shaped mounting bases, and abutment plates. The symmetrically distributed locking plates open and close flexibly via hinged bases, avoiding the cumbersome need for repeated axle box adjustments required by traditional fixed structures. The waist-shaped locking grooves on the locking plates, away from the hinged end, slide with the locking pins on the U-shaped mounting base, allowing for adjustment of the spacing along the length direction to accommodate axle boxes of different widths or models. 2. The arc-shaped contact part of the locking plate fits against the curved surface of the outer wall of the axle box, increasing the contact area and evenly distributing the clamping force, avoiding scratches or deformation caused by local stress concentration. The fastener of the locking pin locks in place to prevent the risk of slippage caused by vibration or accidental contact, improving the fixation reliability and multi-scenario compatibility. 3. The pulley assembly improves the movement efficiency and safety of the axle box rollers through the rigid support of the connecting seat and the rotation characteristics of the rollers. The connecting seat adopts a symmetrical connecting plate structure, which evenly transmits the weight of the locking bracket and axle box to the two rollers, avoiding the risk of uneven wear or overturning caused by excessive force on one side. The rollers are rotatably connected to the connecting plate through the wheel axle, and can only rotate freely around the wheel axle axis, ensuring the straightness of the movement trajectory and preventing axle box offset caused by roller wobbling. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of multiple axle box tugs supporting the frame axle boxes.

[0024] Figure 2 This is a schematic diagram of the overall structure of an axle box tugboat according to an embodiment of this application.

[0025] Figure 3 This is an exploded view of the structure of an axle box tugboat according to an embodiment of this application.

[0026] Figure 4 This is a schematic diagram of the structure of the locking plate and locking pin in the open state according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Locking bracket; 11. Bracket body; 111. Mounting base plate; 112. Mounting side plate; 1121. Structural groove; 1122. Hinge seat; 1123. U-shaped mounting seat; 1124. Abutting upright plate; 12. Locking plate; 121. Arc-shaped abutting part; 122. Locking part; 123. Waist-shaped locking groove; 13. Locking pin; 131. Fastener; 2. Pulley assembly; 21. Connecting seat; 211. Connecting plate; 212. Connecting upright plate; 22. Rolling wheel; 221. Wheel axle; 3. Frame; 31. Axle box. Detailed Implementation

[0028] To make the purpose, technical solution, and advantages of this application clearer, the following description is provided in conjunction with the appendix. Figure 1-4 The present application will be further described in detail with reference to the embodiments.

[0029] This application discloses an axle box trolley. (Refer to...) Figure 1 and Figure 2 The axle box towing wheel includes a locking bracket 1 and a pulley assembly 2. The locking bracket 1, as the core support structure, directly supports the bottom outer shell, the side closest to the ground, and the inner bottom surface of the axle box 31 on the frame 3, allowing the axle box 31 to be lifted off the ground. The pulley assembly 2, through its rolling characteristics, reduces frictional resistance during movement, preventing secondary damage to the axle box 31 or surrounding equipment due to improper dragging, thus improving operational safety and efficiency.

[0030] Reference Figure 2 and Figure 3 The locking bracket 1 includes a bracket body 11, locking plates 12, and locking pins 13. In this embodiment, the number of locking plates 12 is preferably two, which are locked to the inner and outer sides of the axle box 31, thereby forming a clamping constraint on the axle box 31. The number of locking pins 13 is also two, which cooperate with the locking plates 12 one by one. Each locking plate 12 and locking pin 13 is installed on the bracket body 11.

[0031] The main body 11 of the bracket includes a mounting base plate 111 and two mounting side plates 112. Both mounting side plates 112 are fixedly connected to the top side of the mounting base plate 111. The two mounting side plates 112 are symmetrically arranged and perpendicularly positioned along the two sides of the mounting base plate 111. Each mounting side plate 112 has a structural groove 1121 in its side wall. The mounting base plate 111 serves as the main load-bearing structure of the locking bracket 1. The structural groove 1121 in the side wall reduces the material usage and weight of the mounting side plates 112 without affecting the overall strength.

[0032] Combination Figure 4 The mounting side plate 112 has a hinge seat 1122 on its top side for movably connecting the locking plate 12. The hinge seat 1122 is vertically arranged and fixedly connected to the edge of the mounting side plate 112. A U-shaped mounting seat 1123 for mounting the locking pin 13 is hinged to the top surface of the mounting side plate 112 on the side away from the hinge seat 1122. The locking pin 13 is vertically inserted and fixedly connected to the U-shaped mounting seat 1123. A fastener 131 for cooperating with the locking plate 12 is sleeved and threaded onto the locking pin 13. In this embodiment, the locking pin 13 is preferably a screw with a length adapted to the locking plate 12, and the fastener 131 is preferably a hexagonal bolt with an inner diameter matching the locking pin 13.

[0033] An abutment plate 1124 is provided on the top surface of the mounting side plate 112 at an adjacent position to the U-shaped mounting base 1123. The abutment plate 1124 is vertically set and fixedly connected to the mounting side plate 112. The abutment plate 1124 can abut against the side wall of the U-shaped mounting base 1123, restricting the degree of freedom of the U-shaped mounting base 1123, thereby providing rigid support for the U-shaped mounting base 1123.

[0034] The locking plate 12 has an integrally connected arc-shaped abutment portion 121 and a locking portion 122. The arc-shaped abutment portion 121 is used to mate with the outer wall of the axle box 31, and the locking portion 122 is used to mate with the locking pin 13. When the arc-shaped abutment portion 121 abuts against the outer wall of the axle box 31, the locking portion 122 is located on the upper side of the U-shaped mounting base 1123 and the abutment plate 1124. The locking portion 122 has a waist-shaped locking groove 123 along its length at the end away from the arc-shaped abutment portion 121 for the locking pin 13 to be engaged.

[0035] Reference Figure 2 and Figure 3 The pulley assembly 2 includes a connecting seat 21 and a rolling wheel 22. The connecting seat 21 is fixedly connected to the lower side of the mounting base plate 111, and the rolling wheel 22 is rotatably connected to the connecting seat 21. The connecting seat 21 includes a connecting plate 211 and two symmetrically arranged and vertically fixedly connected connecting upright plates 212 on both sides of the connecting plate 211. The rolling wheel 22 is located between the two connecting upright plates 212. An axle 221 passes through the rolling wheel 22 at its axial position, and the axle 221 passes through the connecting upright plate 212 and the rolling wheel 22. Both ends of the axle 221 are fixedly connected to the two connecting upright plates 212 respectively, and the axle 221 is rotatably connected to the rolling wheel 22.

[0036] The two connecting plates 212 evenly distribute the weight of the locking bracket 1 and the axle box 31 to the two rolling wheels 22. The symmetrical layout avoids deformation of the connecting plates 212 or uneven wear of the rolling wheels 22 due to excessive force on one side, thus improving the structural stability of the pulley assembly 2 under load. The rolling wheels 22 are rotatably connected to the two connecting plates 212 through the wheel axle 221, so that the rolling wheels 22 can only rotate freely around the axis of the wheel axle 221, and cannot undergo radial offset or axial movement. This ensures the straight-line motion trajectory of the rolling wheels 22 when rolling on the ground, and avoids the displacement of the axle box 31 due to the shaking of the rolling wheels 22, so that the axle box 31 can be accurately adjusted to the target position.

[0037] The implementation principle of an axle box trolley according to an embodiment of this application is as follows: The locking bracket 1 serves as the core support structure, and through the symmetrically arranged locking plates 12 and locking pins 13, it achieves stable fixation of the front and rear sides of the axle box. The hinge seat 1122 on the mounting side plate 112 allows the locking plate 12 to open and close flexibly, facilitating the movement of the axle box above the mounting base plate 111. The arc-shaped abutment portion 121 of the locking plate 12 fits against the curved surface of the axle box's outer wall, increasing the contact area and evenly distributing the clamping force, thus avoiding damage to the axle box caused by localized stress concentration. A waist-shaped locking groove 123 is formed in the locking portion 122 away from the hinge end of the locking plate 12, which slides in cooperation with the locking pin 13 within the U-shaped mounting seat 1123 on the mounting side plate 112. The U-shaped mounting seat 1123 is located on the top surface of the mounting side plate 112, and its freedom is restricted and rigidly supported by the abutment plate 1124. The locking pin 13 is moved along the waist-shaped groove to adjust the distance between the two locking plates 12, adapting to axle boxes of different widths or models (such as axle boxes for high-speed trains and subways). The hexagonal bolts on the locking pin 13 serve as fasteners 131, locking the final position after adjustment and ensuring that the axle box does not slide laterally or tilt during maintenance.

[0038] The pulley assembly 2, through the cooperation of the connecting seat 21 and the rolling wheels 22, enables the flexible movement of the axle box. The connecting seat 21 consists of a connecting plate 211 and two symmetrical connecting uprights 212 on both sides, which evenly distributes the weight of the locking bracket 1 and the axle box to the two rolling wheels 22, avoiding the risk of uneven wear or overturning caused by excessive force on one side. The rolling wheels 22 are rotatably connected to the connecting uprights 212 through axles 221, ensuring that the movement is along a straight trajectory and preventing the axle box from deviating due to the shaking of the rolling wheels 22. The low resistance characteristics of rolling friction allow workers to easily adjust the position of the axle box by simply pushing or pulling, eliminating the need for manual handling of heavy components, significantly reducing labor intensity and improving maintenance efficiency.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A type of axle box trolley, characterized in that: It includes a locking bracket (1) for supporting the axle box and a pulley assembly (2) located on the underside of the locking bracket (1); The locking bracket (1) includes a bracket body (11), at least two locking plates (12) symmetrically disposed on the upper side of the bracket body (11) for fixing the two sides of the axle box, and locking pins (13) disposed on the upper side of the bracket body (11) for correspondingly cooperating with the locking plates (12); The locking plate (12) has an arc-shaped abutment portion (121) for engaging with the outer wall of the axle box and a locking portion (122) for engaging with the locking pin (13), and a waist-shaped locking groove (123) is formed in the locking portion (122). When the arc-shaped abutment part (121) abuts against the outer wall of the axle box, the locking part (122) is located on the upper side of the U-shaped mounting base (1123) and the abutment plate (1124).

2. The axle box trolley according to claim 1, characterized in that: The main body (11) of the bracket includes a mounting base plate (111) and two mounting side plates (112) that are vertically arranged and fixedly connected to the top side of the mounting base plate (111). The two mounting side plates (112) are symmetrically arranged at the edge positions on both sides of the mounting base plate (111). Each of the mounting side plates (112) has a hinge seat (1122) on the top edge for mounting the locking plate (12). The locking pin (13) is located on the side of the mounting side plate (112) away from the hinge seat (1122). The locking plate (12) has a waist-shaped locking groove (123) along the length direction at the end away from the hinge seat (1122) for the locking pin (13) to be inserted. The locking pin (13) is provided with a fastener (131) for cooperating with the locking plate (12).

3. The axle box trolley according to claim 2, characterized in that: The top surface of the mounting side plate (112) is movably connected to a U-shaped mounting base (1123) for mounting the locking pin (13) on the side away from the hinge seat (1122). The mounting side plate (112) is vertically arranged on the top surface and fixedly connected to an abutment plate (1124) for the U-shaped mounting base (1123) to abut against.

4. The axle box trolley according to claim 1, characterized in that: The pulley assembly (2) includes a connecting seat (21) fixedly connected to the lower side of the locking bracket (1) and a rolling wheel (22) rotatably connected to the connecting seat (21).

5. The axle box trolley according to claim 4, characterized in that: The connecting seat (21) includes a connecting plate (211) and two symmetrically arranged and vertically fixedly connected to both sides of the connecting plate (211). The rolling wheel (22) is located between the two connecting plates (212). The rolling wheel (22) has an axle (221) passing through its axial position. The axle (221) passes through the connecting plate (212) and the rolling wheel (22). The two ends of the axle (221) are fixedly connected to the two connecting plates (212) respectively. The axle (221) and the rolling wheel (22) are rotatably connected.

6. The axle box trolley according to claim 2, characterized in that: The mounting side plate (112) has a structural groove (1121) on its side wall.

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