Shaft end stamp removing device

Abstract

The utility model belongs to the track traffic equipment overhauling technical field, specifically discloses a kind of axle end steel stamp removing device, including impact mechanism, guide sleeve, chisel bar, the guide sleeve is connected with the impact mechanism, the chisel bar is located in the guide sleeve, and one end of the chisel bar is connected with the output end of the impact mechanism, the other end of the chisel bar is worn out the guide sleeve, the reset piece is sleeved in the chisel bar outside, and the output end of the impact mechanism can provide axial impact force for the chisel bar.The utility model can reduce operation difficulty and risk in the process of removing redundant steel stamp, improve operation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of rail transit equipment maintenance technology, specifically to a device for removing steel stamps from shaft ends. Background Technology

[0002] In the field of rail transit, high-speed trains, as efficient and convenient land transportation tools, have operational safety and reliability that directly affect passenger safety and the stable operation of the national transportation network. High-level maintenance of high-speed trains, as a crucial link in ensuring vehicle performance, encompasses comprehensive testing, repair, and maintenance of the vehicle's core components. Among these, the axle, as a vital load-bearing component that transmits power and supports the train body, is of paramount importance in high-level maintenance work.

[0003] During advanced maintenance of high-speed trains, axle end inspection stamps are required. These stamps serve as crucial markers in the axle maintenance process, recording important information such as the time, unit, and personnel involved in each inspection. They are the core basis for tracing axle maintenance history, determining axle lifespan, and determining subsequent maintenance cycles. Therefore, the axle end inspection stamping must be strictly performed according to regulations during advanced high-speed train maintenance. Based on industry maintenance standards and actual operational needs, the axle end stamping area is divided into four sectors. Over long-term use, once all four sectors are filled with inspection stamps, to ensure accurate and clear recording of new maintenance information, the oldest stamp in the earliest sector must be removed before the current maintenance content is stamped. This ensures the continuity and effectiveness of the axle end stamp information.

[0004] However, in the current process of removing old steel stamps from axle ends, the stamps themselves are highly hard and tightly bonded to the axle material, making them impossible to remove using conventional methods such as grinding. The industry commonly uses manual hammering for this purpose. This traditional method has several significant problems: First, manual hammering relies entirely on the physical exertion of the workers, resulting in high labor intensity and low efficiency, failing to meet the large-scale, high-efficiency maintenance needs of high-speed train overhauls. Second, manual operation has extremely poor precision; workers struggle to accurately control the hammer's striking force, angle, and position, and even slight carelessness can cause severe mechanical damage to the axle end edge, such as cracks and deformation. Third, given the high difficulty and risk of manually removing steel stamps, it places extremely high demands on the workers' technical skills, experience, and concentration. Utility Model Content

[0005] This utility model provides a device for removing steel stamps from shaft ends, which aims to reduce the difficulty and risk of operation and improve the efficiency of operation in the process of removing excess steel stamps.

[0006] This utility model is achieved through the following technical solution: a device for removing steel stamps from shaft ends, comprising an impact mechanism, a guide sleeve, and a chisel rod. The guide sleeve is connected to the impact mechanism, the chisel rod is located inside the guide sleeve, and one end of the chisel rod is connected to the output end of the impact mechanism. The other end of the chisel rod extends out of the guide sleeve, and a reset member is sleeved on the outside of the chisel rod. The output end of the impact mechanism can provide axial impact force to the chisel rod.

[0007] Compared with existing technologies, this solution has the following advantages and beneficial effects:

[0008] In this solution, the guide sleeve constrains the chisel rod to reciprocate only along the axial direction, which can control the impact position deviation and reduce the occurrence of cracks and deformation at the shaft end edge. The impact force provided by the impact mechanism to the chisel rod can automatically remove the steel stamp, and the impact force can be controlled by adjusting the air pressure of the impact mechanism. This avoids the problem of axle dent caused by uncontrolled manual force in the traditional method, and greatly reduces the risk of scrapping.

[0009] In addition, this solution uses pneumatic power to replace manual labor, and the operator only needs to hold the steel stamp, which effectively reduces the difficulty and risk of manual operation and effectively improves the efficiency of operation, while also reducing the requirements for the operator's technical level, operating experience and concentration.

[0010] Furthermore, the guide sleeve is detachably connected to the impact mechanism.

[0011] Beneficial effect: With this design, when a component is damaged, it is convenient to remove the guide sleeve for replacement or repair.

[0012] Furthermore, a connector is fixedly connected to the tail end of the guide sleeve, and a through hole matching the chisel rod is opened at the front end of the guide sleeve. The guide sleeve is threadedly connected to the impact mechanism through the connector.

[0013] Beneficial effects: In this solution, the guide sleeve is connected to the impact mechanism by a threaded connection through a connector. This detachable connection method is not only simple and easy to install and disassemble, but also ensures the coaxiality of the connection.

[0014] Furthermore, the connector is a polygonal nut.

[0015] Beneficial effect: With this design, the connector is a polygonal nut, which makes it easy to disassemble and install using tools such as wrenches.

[0016] Furthermore, it also includes a reset component, which is sleeved on the outside of the chisel rod.

[0017] Beneficial effects: The reset component enables the chisel rod to automatically reset and provides a continuous and stable reverse force, ensuring that the chisel rod can accurately return to its initial position after each impact, avoiding reset deviation caused by fluctuations in pneumatic reverse force.

[0018] Furthermore, a limiting step is provided at one end of the chisel rod near the impact mechanism, one end of the reset member abuts against the limiting step, and the other end of the reset member abuts against the inner end of the guide sleeve.

[0019] Beneficial effects: The bidirectional contact formed between the limiting step and the inner end of the guide sleeve can precisely limit the axial movement range of the chisel rod. The reset component is axially fixed by the contact at both ends, preventing axial movement during the reciprocating motion of the chisel rod (if there is no contact, the spring may shift backward and wear in contact with the impact mechanism). This ensures that the spring is always in the center of the annular gap between the chisel rod and the guide sleeve, further ensuring the coaxiality of the reset force and the chisel rod axis, and preventing the chisel rod from tilting due to spring offset.

[0020] The two ends of the reset component abut against the limiting step and the inner end of the guide sleeve, respectively, forming a fixed axial constraint. This precisely locks the pre-compression of the reset component, preventing over-compression or under-compression during the reciprocating motion of the chisel. The limiting step prevents the reset component from falling off towards the impact mechanism, while the inner end of the guide sleeve prevents it from falling off towards the front end of the chisel, forming a two-way anti-detachment structure. Compared to a sleeve-type installation without abutment, this completely prevents the reset component from breaking or loosening due to vibration or impact and ejecting from the device.

[0021] Furthermore, the limiting step is annular, and the limiting step is coaxially and fixedly connected to the chisel rod.

[0022] Beneficial effects: The contact between the annular limiting step and the reset component is an annular surface, which can evenly distribute the reset force of the elastic component along the circumference of the chisel rod, avoiding localized force concentration;

[0023] The annular contact surface fits perfectly with the end face of the reset component, without any local gaps or loose connections. This prevents the reset component from tilting laterally due to uneven force distribution, ensuring that the reset component always extends and contracts axially. This further reduces frictional wear between the reset component and the inner wall of the guide sleeve, extending the service life of the reset component.

[0024] Furthermore, the chisel rod is detachably connected to the output end of the impact mechanism.

[0025] Beneficial effects: The detachable structure is compatible with chisel rods of different specifications. Simply replace the corresponding chisel rod to meet the axle end stamp removal needs of various EMU models, making it more practical. It eliminates the need for a separate impact mechanism for each type of chisel rod, effectively saving costs.

[0026] Furthermore, the chisel rod is threaded to the output end of the impact mechanism or connected via a quick-connect coupling.

[0027] Beneficial effects: In this solution, the chisel rod and the output end of the impact mechanism can be connected by a threaded connection or by a quick-connect coupling. Both methods can achieve the connection between the chisel rod and the output end of the impact mechanism.

[0028] Furthermore, the chisel rod includes a conical chisel rod with a conical end or a cylindrical chisel rod that is cylindrical in shape, and the conical chisel rod and the cylindrical chisel rod can be detachably connected to the impact mechanism respectively.

[0029] Beneficial effects: Both types of chisels are compatible with the same impact mechanism connection interface, eliminating the need to configure separate impact equipment for different functions or disassemble the device for overall structural adjustments. Operators only need to focus on chisel replacement and operation, avoiding process interruptions caused by equipment switching and further optimizing the maintenance rhythm.

[0030] Conical chisels need to be adapted to the need for chiseling according to strokes to solve the problem of difficult peeling of steel stamps, while cylindrical chisels need to be adapted to the need for smoothing with circular motion to solve the problem of uneven surfaces. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the embodiments of the present invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of an embodiment of the device for removing steel stamps from shaft ends according to the present invention;

[0033] Figure 2 This is an exploded view of an embodiment of the device for removing steel stamps from shaft ends according to the present invention.

[0034] Figure 3 This is a schematic diagram of the structure of the guide sleeve in an embodiment of the shaft end steel stamp removal device of this utility model;

[0035] Figure 4 This is a schematic diagram of the conical chisel rod in an embodiment of the shaft end steel stamp removal device of this utility model;

[0036] Figure 5 This is a schematic diagram of the cylindrical chisel rod in an embodiment of the shaft end stamp removal device of this utility model.

[0037] The attached diagram shows the markings and corresponding component names:

[0038] Impact mechanism 1, handle 101; guide sleeve 2, nut 201, through hole 202; chisel rod 3, limiting step 301, conical chisel rod 302, cylindrical chisel rod 303; return spring 4. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0040] As one embodiment of this application, such as Figures 1-2 As shown, this embodiment provides a device for removing steel stamps from shaft ends, including an impact mechanism 1, a guide sleeve 2, and a chisel 3. The guide sleeve 2 is connected to the impact mechanism 1, the chisel 3 is located inside the guide sleeve 2, and one end of the chisel 3 is connected to the output end of the impact mechanism 1. The other end of the chisel 3 extends out of the guide sleeve 2, and the output end of the impact mechanism 1 can provide axial impact force to the chisel 3.

[0041] The impact mechanism 1 in this embodiment can be a pneumatic impact mechanism or a hydraulic impact mechanism. The two use different power sources, one is compressed air and the other is hydraulic oil. The impact mechanism 1 in this embodiment is a pneumatic impact mechanism, specifically a pneumatic impact hammer in the prior art.

[0042] In one embodiment, the guide sleeve 2 is detachably connected to the impact mechanism 1, specifically: combining... Figure 3 As shown, a connector is fixedly connected to the tail end of the guide sleeve 2, and a through hole 202 matching the chisel rod 3 is opened at the front end of the guide sleeve 2. The guide sleeve 2 is threadedly connected to the impact mechanism 1 through the connector. The connector is a polygonal nut, and in this embodiment, the connector is a hexagonal nut 201. The hexagonal nut 201 is welded to the tail end of the guide sleeve 2. The guide sleeve 2 is threadedly connected to the connecting end of the pneumatic impact mechanism 1 through the hexagonal nut 201.

[0043] In one embodiment, such as Figure 2 As shown, a device for removing steel stamps from shaft ends also includes a resetting component, which is sleeved on the outside of the chisel rod 3, in conjunction with... Figure 2 , Figure 4 and Figure 5 As shown, the chisel rod 3 has a limiting step 301 at one end near the impact mechanism 1. One end of the reset member abuts against the limiting step 301, and the other end of the reset member abuts against the inner end of the guide sleeve. In this embodiment, the reset member is a spiral reset spring 4. The reset spring 4 can greatly increase the rebound force and reduce the vibration during use.

[0044] In one embodiment, such as Figure 2 , Figure 4 and Figure 5As shown, the limiting step 301 in this embodiment is annular, and the limiting step 301 is coaxially and fixedly connected to the chisel rod 3. In this embodiment, the limiting step 301 and the chisel rod 3 are coaxially welded and fixed or integrally formed.

[0045] In one embodiment, the chisel rod 3 is detachably connected to the output end of the impact mechanism 1.

[0046] In one embodiment, the chisel rod 3 is connected to the output end of the impact mechanism 1 by a thread. A concave hole is opened at the tail end of the chisel rod 3 and an internal thread is machined in the concave hole. An external thread is machined on the outside of the output end of the impact mechanism 1. The chisel rod 3 is threadedly engaged with the external thread of the output end of the impact mechanism 1 through the internal thread in the concave hole at the tail end. This achieves the connection between the chisel rod 3 and the output end of the impact mechanism 1.

[0047] In another embodiment, the chisel rod 3 is connected to the output end of the impact mechanism 1 via a quick-connect connector. In this embodiment, the quick-connect connector is a pneumatic quick-connect connector from the prior art, and its structure will not be described in detail here. The quick-connect connector is fixed to the output shaft of the impact mechanism 1 by a pin. When installing the chisel rod 3, inserting the chisel rod 3 into the quick-connect connector will lock and fix the chisel rod 3 in place. Quick connection is achieved through "insertion-locking". Disassembly is achieved by pressing the unlock button on the quick-connect connector.

[0048] In one embodiment, one end of the quick-connect connector in the above embodiment is fixed to the output end of the impact mechanism 1 by a pin, and the other end of the quick-connect connector is machined with internal or external threads, while one end of the chisel rod 3 is correspondingly machined with external or internal threads. The chisel rod 3 and the quick-connect connector can also be connected by threads. In this embodiment, it is not necessary to machine threads on the output end of the impact mechanism 1, but to use an intermediate part, namely the quick-connect connector. This makes the processing more convenient and simple, does not affect the structure of the impact mechanism 1, and reduces the processing cost of the impact mechanism 1.

[0049] In one embodiment, combined Figure 4 and Figure 5 As shown, the chisel rod 3 includes a conical chisel rod 302 with a conical end or a cylindrical chisel rod 303 with a cylindrical shape. The conical chisel rod 302 and the cylindrical chisel rod 303 can be detachably connected to the output end of the impact mechanism 1, respectively.

[0050] The specific implementation process is as follows:

[0051] This utility model is a device for removing steel stamps from shaft ends, including a pneumatic impact mechanism 1, a guide sleeve 2, a chisel rod 3, and a return spring 4. A limit step 301 is fixed on the circumferential side of the rear section of the chisel rod 3. A hexagonal nut 201 is fixed at the tail end of the guide sleeve 2. A through hole 202 matching the chisel rod 3 is opened at the front end of the guide sleeve 2. The chisel rod 3 is fixedly connected to the output end of the pneumatic impact mechanism 1. The return spring 4 is sleeved on the chisel rod 3 from the front end of the chisel rod 3. The guide sleeve 2 is sleeved outside the return spring 4 and the chisel rod 3. The guide sleeve 2 is threadedly connected to the connecting end of the impact mechanism 1 through the hexagonal nut 201. The front end of the chisel rod 3 extends out from the through hole 202 at the front end of the guide sleeve 2.

[0052] In this embodiment, a handle 101 is integrally connected to the outer shell of the pneumatic impact mechanism. The handle 101 facilitates the operator's use of the entire device for operation. The specific operation process is as follows:

[0053] 1. First, fix the conical chisel rod 302 to the output end of the pneumatic impact mechanism 1. Then, in sequence, put the return spring 4 on the conical chisel rod 302. Then, fix the guide sleeve 2 to the pneumatic impact mechanism 1 to complete the assembly.

[0054] 2. Activate the pneumatic impact mechanism 1, align the cone-shaped chisel rod 302 with the cone head of the inspection stamp to be removed and chisel it to make the strokes.

[0055] 3. Turn off the pneumatic impact mechanism 1, remove the conical chisel 302, replace it with the cylindrical chisel 303, and then turn on the pneumatic impact mechanism again to smooth out the chisel marks in a circular motion, restoring it to its state before chiseling.

[0056] 4. Finally, stamp the required new maintenance stamp on the restored sector according to the process standards.

[0057] It should be noted that the above description of the disclosed embodiments enables those skilled in the art to implement or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for removing steel stamps from shaft ends, characterized in that, It includes an impact mechanism, a guide sleeve, and a chisel rod. The guide sleeve is connected to the impact mechanism, the chisel rod is located inside the guide sleeve, one end of the chisel rod is connected to the output end of the impact mechanism, and the other end of the chisel rod extends out of the guide sleeve. The output end of the impact mechanism can provide axial impact force to the chisel rod.

2. The device for removing steel stamps from shaft ends according to claim 1, characterized in that, The guide sleeve is detachably connected to the impact mechanism.

3. The device for removing steel stamps from shaft ends according to claim 2, characterized in that, The guide sleeve is fixedly connected to a connector at its tail end, and the guide sleeve has a through hole at its front end that matches the chisel rod. The guide sleeve is threadedly connected to the impact mechanism through the connector.

4. The device for removing steel stamps from shaft ends according to claim 3, characterized in that, The connector is a polygonal nut.

5. The device for removing steel stamps from shaft ends according to claim 1, characterized in that, It also includes a reset component, which is sleeved on the outside of the chisel rod.

6. The device for removing steel stamps from shaft ends according to claim 5, characterized in that, The chisel rod is provided with a limiting step at one end near the impact mechanism, one end of the reset member abuts against the limiting step, and the other end of the reset member abuts against the inner end of the guide sleeve.

7. The device for removing steel stamps from shaft ends according to claim 6, characterized in that, The limiting step is annular and is coaxially and fixedly connected to the chisel rod.

8. A device for removing steel stamps from shaft ends according to any one of claims 1-7, characterized in that, The chisel rod is detachably connected to the output end of the impact mechanism.

9. The device for removing steel stamps from shaft ends according to claim 8, characterized in that, The chisel rod is connected to the output end of the impact mechanism via a threaded connection or a quick-connect coupling.

10. A device for removing steel stamps from shaft ends according to claim 8, characterized in that, The chisel rod includes a conical chisel rod with a conical end or a cylindrical chisel rod that is cylindrical in shape. The conical chisel rod and the cylindrical chisel rod can be detachably connected to the output end of the impact mechanism, respectively.

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