Tank track pin dismounting device and dismounting method

Abstract

A kind of tank track pin dismounting device and dismounting method, the device is composed of positioning clamping mechanism and transmission mechanism, positioning clamping mechanism includes floating positioning claw, clamping pin, clamping nut, horizontal connecting plate and vertical connecting plate;Transmission mechanism includes screw mechanism, gear and rack mechanism, ratchet mechanism and puller, using the device, without power source, a maintenance personnel or tank crew can quickly complete the dismounting task of track pin, effectively improve the work efficiency, reduce the labor intensity of maintenance personnel, improve the safety of operation.

Description

Technical Field

[0001] This invention relates to the field of track disassembly tools, specifically to a tank track pin disassembly device and a method for disassembling tank track pins using the same device. Background Technology

[0002] As a component of a tank, the track consists of track plates, track pins, and elastic retaining rings for the axles. When a tank is moving, due to the harsh ground conditions, the track pins are subjected not only to significant shearing forces but also to the abrasive action of mud and small stones. This easily leads to track pin failure, such as bending, shearing, and wear, rendering them ineffective in their connecting function. Therefore, replacing track pins is a crucial part of tank maintenance. Traditionally, track pin replacement requires two people: one holds the punch while the other uses a sledgehammer to generate impact force to replace the track pin. This method has many drawbacks. It is not only unsafe but also extremely physically demanding for maintenance personnel. Especially in wartime, it easily exposes the tank's position, causing unnecessary casualties and severely hindering the recovery of tank mobility. Therefore, developing a portable, simple, and labor-saving tank track pin disassembly device is of significant practical importance. Summary of the Invention

[0003] In view of the shortcomings of existing tank track pin disassembly methods, this invention provides a tank track pin disassembly device, which features simple structure, low manufacturing cost, convenient operation, reliable operation, easy portability, and high field adaptability.

[0004] To solve the above technical problems, the present invention adopts the following technical solution:

[0005] A tank track pin removal device includes a base, ratchet, gear, double-row rack, anti-return pawl, swing side plate, pawl, spring, sleeve, ball head, rocker arm, pawl pin connecting plate, swing cross plate, top pin slider, guide key, top rod sleeve, lead screw, top rod, screw, top rod sleeve, vertical connecting plate, horizontal connecting plate, clamping pin, clamping nut, floating positioning pawl, and top pin slider. The base is located at the bottom, the double-row rack is located on the base, the top pin slider is connected to the base via the guide key, the ratchet and gear are located on the top pin slider, and the swing side plate is located on the side. The horizontal plate is located on the upper part of the swing side plate, the pawl pin connecting plate is located on the upper part of the swing horizontal plate, the pawl is located on the pawl pin connecting plate, the check pawl is located on the top pin slider, the rocker arm is located on the pawl pin connecting plate, the sleeve is located outside the rocker arm, the spring is located outside the sleeve, the ball head is located at the end of the rocker arm, the lead screw is connected to the top rod, the top rod sleeve is located outside the top rod, the screw is located on the top rod sleeve, the top rod sleeve is located on the vertical connecting plate, the vertical connecting plate is perpendicularly connected to the horizontal connecting plate, the floating positioning claw is connected to the horizontal connecting plate through the clamping pin and the clamping nut, and the top pin slider is located outside the top rod sleeve.

[0006] Preferably, the device consists of a positioning and clamping mechanism and a transmission mechanism. The positioning and clamping mechanism includes a floating positioning claw, a clamping pin, a clamping nut, a horizontal connecting plate, and a vertical connecting plate. The transmission mechanism includes a screw mechanism, a gear and rack mechanism, a ratchet mechanism, and a puller.

[0007] Preferably, the number of teeth Z of the ratchet shown is 8.

[0008] A method for disassembling tank track pins, characterized by the following steps:

[0009] Step 1, Positioning and Clamping: The positioning and clamping mechanism connects the track pin removal device and the track plate together, and aligns the push rod with the center of the track pin to be removed;

[0010] Step 2, disassemble the elastic retaining ring: rotate the lead screw to move the push rod forward, generating axial thrust, which expands the elastic retaining ring of the shaft that is stuck in the head of the track pin;

[0011] Step 3, disassemble the track pin: Shake the rocker arm, the pawl drives the ratchet to rotate. Since the double-row rack is fixed, the ratchet, gear and top pin slider are rigidly connected. When the ratchet rotates, that is, when the gear rotates, the top pin slider moves forward. The top rod sleeve, lead screw and top rod move forward in a straight line together to push out the track pin at a relatively fast speed.

[0012] Step 4, pull out the push rod: Reverse the pawl and shake the rocker arm. The ratchet mechanism moves, the push rod sleeve moves backward, and the screw drives the push rod to move backward and pull out the push rod.

[0013] Preferably, a screw mechanism is used when disassembling the track pin to obtain a relatively large thrust, which is used to expand the elastic retaining ring at the head of the track pin. After the elastic retaining ring is expanded, a gear-ratchet mechanism is used to shorten the disassembly time.

[0014] Preferably, the rotation center of the pawl is selected to be in the same straight line as the joystick, according to the needs of force transmission, so that the operator's force can be utilized to the maximum extent.

[0015] Preferably, the positioning method is as follows: based on the relatively smooth upper surface of the track plate, the device body is positioned vertically by using a floating positioning claw and the principle of self-reference, and then the device body is positioned horizontally by using the side of the groove on the track plate; in order to overcome the shortcomings of insufficient rigidity of the floating positioning claw, a connecting device consisting of a clamping pin and a vertical connecting plate and a horizontal connecting plate is added between the floating positioning claw and the machine base. After the floating positioning claw is hung, the connecting plate is hooked onto the machine base, and then the clamping pin is tightened, so that the connecting plate is tightly hooked onto the machine base.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] Based on the needs of field maintenance of armored equipment, this application cleverly utilizes the combined drive of a screw mechanism, a gear and rack mechanism, and a ratchet mechanism, which not only solves the problem of insufficient driving force at the start of the drive, but also speeds up the disassembly of track pins.

[0018] This application achieves rapid positioning and clamping of the blank surface by employing floating positioning blocks and utilizing the principle of self-datum. Rapid positioning of the blank surface is a relatively difficult problem to solve in machining. To address this issue, in addition to using floating positioning blocks, the design also utilizes the principle of self-datum to achieve the device's positioning. This positioning method has practical guiding significance for the rapid positioning of blank surfaces in machining.

[0019] This application reduces the number of people required to disassemble track pins from two to one, effectively improving efficiency and significantly enhancing operational safety. Using this device, no power source is needed; a single maintenance worker or tank crew member can quickly complete the disassembly of track pins, effectively increasing efficiency, reducing the workload of maintenance personnel, and improving operational safety. Attached Figure Description

[0020] Figure 1 This is the front view of the track pin removal device;

[0021] Figure 2 This is a cross-sectional view of the track pin removal device;

[0022] Figure 3 This is a simplified diagram of the ejector mechanism.

[0023] In the attached diagram: 1. Base, 2. Ratchet, 3. Gear, 4. Double-row rack, 5. Check pawl, 6. Swinging side plate, 7. Pawl, 8. Spring, 9. Sleeve, 10. Ball head, 11. Rocker arm, 12. Pawl pin connecting plate, 13. Swinging horizontal plate, 14. Top pin slider, 15. Guide slide key, 16. Top rod sleeve, 17. Lead screw, 18. Top rod, 19. Screw, 20. Top rod sleeve, 21. Vertical connecting plate, 22. Horizontal connecting plate, 23. Clamping pin, 24. Clamping nut, 25. Floating positioning claw. Detailed Implementation

[0024] Exemplary embodiments of the present application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited to the specific embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present application and to fully convey the scope of the disclosure of the present application to those skilled in the art.

[0025] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.

[0026] In the accompanying drawings, for clarity, the dimensions of layers, areas, and elements, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0027] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.

[0028] Spatial relation terms such as “below,” “under,” “below,” “below,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0029] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0030] The technical solutions of the specific embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-2 The tank track pin removal device mainly consists of a positioning and clamping mechanism and a transmission mechanism. The positioning and clamping mechanism mainly includes a floating positioning claw 25, a clamping pin 23, a clamping nut 24, a horizontal connecting plate 22, and a vertical connecting plate 21; the transmission mechanism mainly includes a screw mechanism, a gear and rack mechanism, a ratchet mechanism, and a puller. The positioning and clamping mechanism is used to quickly determine the center of the track pin that needs to be replaced and firmly clamp the device onto the track. The transmission mechanism is used to quickly eject the track pin or remove the track plate.

[0032] The specific working process is as follows: (1) Positioning and clamping: The positioning and clamping mechanism connects the track pin dismantling device and the track plate together, and makes the push rod 18 aligned with the center of the track pin to be dismantled. (2) Dismantling the elastic retaining ring: Rotate the screw 17 to move the push rod 18 forward, generating axial thrust, which expands the axial elastic retaining ring stuck in the head of the track pin. (3) Dismantling the track pin: Shake the rocker arm 11, the pawl 7 drives the ratchet 2 to rotate. Since the double-row rack 4 is fixed, the ratchet 2, gear 3 and the push pin slider 14 are rigidly connected. When the ratchet 2 rotates, that is, when the gear 3 rotates, the push pin slider 14 moves forward, and the push rod sleeve 16, screw 17 and push rod 18 move forward in a straight line together to push out the track pin at a relatively fast speed. (4) Pulling out the push rod: Reverse the pawl 7 to shake the rocker arm 11, the ratchet mechanism moves, the push rod sleeve 16 moves backward, and the screw 19 drives the push rod 18 to move backward to pull out the push rod.

[0033] When designing the transmission mechanism, a screw mechanism is used to obtain a relatively large thrust when disassembling the track pins to expand the locking ring at the head of the track pin. After the elastic retaining ring expands, a gear-ratchet mechanism is used to shorten the disassembly time.

[0034] When designing the ratchet mechanism, its function in the device is to enable the gear to move in one direction and transmit force. Due to positional limitations, the rocker arm can only reciprocate within a certain angle. Without the ratchet mechanism, the gear mechanism would move bidirectionally with the rocker arm's back-and-forth swing, which would greatly increase the time required to disassemble the track pins. Based on the force transmission requirements, the rotation center of the pawl 7 is selected to be on the same straight line as the rocker arm 11, so that the operator's force can be utilized to the maximum extent.

[0035] Regarding the selection of ratchet teeth, due to the limitations of overall size, it is difficult to make the ratchet large. If too many teeth are selected, the strength of the ratchet and pawl will decrease, which is not conducive to force transmission. Considering that the ratchet transmits a relatively large force, Z=8 is selected. This way, it does not hinder the disassembly pin, and the ratchet and pawl have sufficient strength.

[0036] When designing the positioning and clamping mechanism, since the track plates are cast parts with unmachined surfaces, positioning pins cannot be used for positioning. Using clamping plates for vertical clamping and positioning is time-consuming. After repeated experiments, the designed positioning method is as follows: Based on the relatively smooth surface of the track plates, a floating positioning claw 25 is used to achieve vertical positioning of the device body using the self-reference principle. The side of the groove on the track plate is then used for horizontal positioning. To overcome the insufficient rigidity of the floating positioning claw 25, a connecting device consisting of a clamping pin 23 and connecting plates 21 and 22 is added between the floating positioning claw 25 and the base 1. After the floating positioning claw 25 is engaged, the connecting plates are hooked onto the base 1, and then the clamping pin 23 is tightened, thus firmly hooking the connecting plates onto the base. The advantages of this method are simple and fast positioning; it only requires a single engagement. In outdoor environments, when mud adheres to the track plates, only a small area needs to be cleaned before the floating positioning claw 25 can firmly hook onto the flange at the bottom of the track plate.

[0037] Calculation of the thrust for disassembling track pins. Figure 2 This is a simplified diagram of the ejection mechanism, where p represents the force exerted by the operator on the rocker arm; Q1 is the axial component of the force. When ejecting the track pin, since the elastic retaining ring at the head of the track pin has been removed, relative movement has already occurred between the track pin and the track. Therefore, the axial thrust can be greatly reduced at this time. Based on the actual situation, Q1 = 5000N is taken.

[0038] From the torque balance, we know that Q1×36=p×(500+36), therefore p=Q1×36÷536=336N.

[0039] The present invention has been described in detail above, with the aim of enabling those skilled in the art to understand and implement the invention. However, this description should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be included within the scope of protection of the invention.

[0040] It should be understood that the phrases "in embodiments of this application" or "in some embodiments" throughout the specification mean that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of this application. Therefore, "in embodiments of this application" or "in some embodiments" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. It should be understood that in the various embodiments of this application, the sequence numbers of the above-described processes do not imply a sequential order of execution; the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application. The sequence numbers of the above-described embodiments are merely descriptive and do not represent the superiority or inferiority of the embodiments.

[0041] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0042] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A tank track pin removal device, characterized by: The device comprises a base (1), a ratchet wheel (2), a gear (3), a double rack (4), a check pawl (5), a swing side plate (6), a pawl (7), a spring (8), a sleeve (9), a ball head (10), a rocker (11), a pawl pin connecting plate (12), a swing cross plate (13), a top pin slider (14), a guide sliding key (15), a top rod sleeve (16), a lead screw (17), a top rod (18), a screw (19), a top rod sleeve (20), a vertical connecting plate (21), a horizontal connecting plate (22), a clamping pin (23), a clamping nut (24), a floating positioning claw (25), the base (1) is located at the bottom, the double rack (4) is located on the base (1), the top pin slider (14) is connected with the base (1) through the guide sliding key (15), the ratchet wheel (2) and the gear (3) are located on the top pin slider (14), the swing side plate (6) is located on the side, the swing cross plate (13) is located on the upper part of the swing side plate (6), the pawl pin connecting plate (12) is located on the upper part of the swing cross plate (13), the pawl (7) is located on the pawl pin connecting plate (12), the check pawl (5) is located on the top pin slider (14), the rocker (11) is located on the pawl pin connecting plate (12), the sleeve (9) is located outside the rocker (11), the spring (8) is located outside the sleeve (9), the ball head (10) is located at the end of the rocker (11), the lead screw (17) is connected with the top rod (18), the top rod sleeve (16) is located outside the top rod (18), the screw (19) is located on the top rod sleeve (16), the top rod sleeve (20) is located on the vertical connecting plate (21), the vertical connecting plate (21) is connected with the horizontal connecting plate (22) perpendicularly, the floating positioning claw (25) is connected on the horizontal connecting plate (22) through the clamping pin (23) and the clamping nut (24), and the top pin slider (14) is located outside the top rod sleeve (16).

2. A tank track pin removal device according to claim 1, characterised in that: The device is composed of a positioning and clamping mechanism and a transmission mechanism, the positioning and clamping mechanism comprises a floating positioning claw (25), a clamping pin (23), a clamping nut (24), a horizontal connecting plate (22) and a vertical connecting plate (21), and the transmission mechanism comprises a screw mechanism, a gear and rack mechanism, a ratchet mechanism and a puller.

3. A tank track pin removal device according to claim 2, characterised in that: The number of teeth of the ratchet wheel is 8.

4. The method of removing a tank track pin using the tank track pin removal device of claim 3, wherein: The method comprises the following steps: Step one, positioning and clamping: the positioning and clamping mechanism connects the track pin dismounting device and the track plate together, and makes the top rod (18) align with the center of the dismounted track pin; Step two, dismounting the elastic snap ring: rotating the lead screw (17) makes the top rod (18) move forward, generating an axial thrust, and expanding the elastic snap ring clamped on the shaft of the track pin head; Step three, dismounting the track pin: shaking the rocker (11), the pawl (7) drives the ratchet wheel (2) to rotate, since the double rack (4) is fixed, the ratchet wheel (2) and the gear (3) are rigidly connected with the top pin slider (14), when the ratchet wheel (2) rotates, i.e. the gear (3) rotates, the top pin slider (14) moves forward, and the top rod sleeve (16), the lead screw (17) and the top rod (18) move forward together in a straight line, and the track pin is ejected at a relatively fast speed; Step four, pull out the ejector rod: reverse the pawl (7) shake the rocker (11), ratchet mechanism movement, ejector rod sleeve (16) back, screw (19) drive the ejector rod (18) back to pull out the ejector rod.

5. The method of claim 4, wherein: When starting to disassemble the track pin, a screw mechanism is used to obtain a relatively large thrust force to expand the elastic ring at the head of the track pin. After the elastic ring is expanded, a gear-ratchet mechanism is used to shorten the disassembly time.

6. The method of claim 5, wherein: According to the transmission needs, the rotation center of the pawl (7) is selected to be in the same straight line as the rocker (11), so that the force of the operator is used to the maximum extent.

7. The method of claim 6, wherein: The positioning method is: according to the relatively smooth upper surface of the track plate, the device body is positioned up and down by using the floating positioning claw (25) and using the self-reference principle, and then the device body is positioned left and right by using the side of the groove on the track plate; In order to overcome the disadvantage of insufficient rigidity of the floating positioning claw (25), a connecting device composed of a clamping pin (23) and a vertical connecting plate (21) and a horizontal connecting plate (22) is added between the floating positioning claw (25) and the machine base (1). After the floating positioning claw (25) is hung, the connecting plate is hooked to the machine base (1), and then the clamping pin (23) is tightened, so that the connecting plate is tightly hooked to the machine base (1).

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