Auxiliary tool for disassembling coupling

Abstract

The utility model provides an auxiliary tool for dismounting a coupling, which is provided with a transversely arranged pull screw rod, the pull screw rod is sequentially and movably sleeved with a left buffer check ring, a hollow support frame, a right buffer check ring, a retaining check ring and a gasket from left to right, and the pull screw rod is screwed with a retaining nut on a threaded end head on the right side of the gasket; the left buffer check ring is a vertical nylon check ring with a fan-shaped opening; the hollow supporting frame is provided with a left vertical disc and a right vertical disc which are provided with central through holes, the left disc is provided with a fan-shaped notch which is the same as that of the left buffer check ring, and the two discs are connected into a hollow supporting frame through a plurality of connecting rib plates; the right buffer check ring is a vertical nylon check ring; and the retaining ring is a vertical disc with a central through hole. When the auxiliary tool is used for disassembling the coupling, the popped coupling impacts on the left buffering check ring, impact force can be effectively removed through buffering, force unloading and blocking of all parts on the pull screw, the coupling is prevented from being damaged or popped out to hurt people, and meanwhile the end face of the coupling cannot be scratched.

Description

Technical Field

[0001] This utility model relates to a disassembly tool for the maintenance of rail train components, specifically an auxiliary tool used when disassembling the coupling between the traction motor and the gearbox of a rail train, belonging to the field of mechanical tooling technology. Background Technology

[0002] When the traction motor of a railcar transmits power to the wheel axle to drive the wheels, the output shaft of the traction motor is connected to the input shaft of the wheel axle gearbox through a coupling. Both the output shaft end of the traction motor and the input shaft end of the wheel axle gearbox are equipped with couplings. When the traction motor or wheel axle gearbox needs to be repaired, or when the coupling is faulty and needs to be replaced, the couplings at the corresponding shaft ends must be disassembled and reassembled.

[0003] This type of coupling uses a tapered interference fit with the corresponding shaft end. The shaft end has a center threaded hole and an oil injection hole. The oil injection hole has a channel connecting to the fit clearance between the coupling and the shaft end. Currently, the specific operation method for installing and disassembling this type of coupling is as follows: When installing the coupling, connect the high-pressure oil circuit of a manual expansion pump to the oil injection hole on the shaft end. Screw a pull rod into the center threaded hole on the shaft end. A push sleeve and a push cylinder with a through hole are sequentially fitted onto the pull rod, and a stop nut is provided to restrict the movement of the push cylinder. The push cylinder is controlled by a manual push pump. The manual push pump controls the extension of the push cylinder to push the push sleeve against the coupling. At the same time, high-pressure oil is injected into the shaft end by the manual expansion pump to expand the inner hole of the coupling, thereby gradually pushing the coupling into the shaft end to complete the installation. When disassembling the coupling, the same tooling configuration is used as for installation, but the push cylinder is kept in a certain extended state, and a certain clearance is maintained between the coupling, the push cylinder, and the push sleeve. Figure 6 As shown, high-pressure oil is injected into the shaft end by a manual expansion pump. When the pressure is high enough, the coupling can be ejected. The extended propulsion cylinder can buffer the impact when the coupling is ejected, so as to avoid damage to the coupling or injury to people from ejection.

[0004] However, after disassembling the coupling several times using the above method, the internal oil circuit of the extended propulsion cylinder is easily damaged due to the instantaneous impact of the impact load from the ejected coupling. As a result, the pressure of the propulsion cylinder cannot be increased when installing the coupling, and it can only be sent for repair or scrapped, which is very costly, time-consuming and laborious, and causes inconvenience to the work. Utility Model Content

[0005] The purpose of this invention is to provide a low-cost and more durable auxiliary tooling for disassembling couplings, which provides a buffer for the ejected couplings during disassembly to prevent damage to the couplings or injury from ejection.

[0006] The specific technical solution adopted in this utility model is as follows:

[0007] A coupling disassembly auxiliary tooling includes a horizontally arranged pull rod. The pull rod is a long rod with threaded ends and a smooth middle section. From left to right, the pull rod sequentially houses a left buffer retaining ring, a hollow support frame, a right buffer retaining ring, a backstop retaining ring, and a washer, all capable of sliding laterally along the rod. A backstop nut is screwed onto the threaded end of the washer on the right side of the pull rod. The left buffer retaining ring is a vertically arranged, wide nylon retaining ring with a small inner bore. The outer diameter of the left buffer retaining ring is larger than the diameter of the coupling's inner bore. The left buffer retaining ring has a fan-shaped notch extending from its inner bore to its outer edge, with an angle θ of 45°–90°. The hollow support frame has two centrally located supports. The two upright discs have the same outer diameter as the left buffer ring. The left disc has a fan-shaped notch with the same shape as the left buffer ring. The two discs are connected by multiple spaced connecting ribs to form a hollow support frame. Each connecting rib is completely offset from the central through hole of the two discs and the fan-shaped notch of the left disc. The right buffer ring is a vertically positioned, wide nylon ring with a small inner hole. The thickness, inner diameter, and outer diameter of the right buffer ring are the same as those of the left buffer ring. The anti-reverse retaining ring is an upright disc with a central through hole and an outer diameter the same as that of the right buffer ring. The washer is a flat washer with an outer diameter smaller than that of the anti-reverse retaining ring and is matched with the anti-reverse nut.

[0008] This auxiliary tooling has the advantages of simple structure, convenient installation, low cost, and good durability. When using this auxiliary tooling to disassemble the coupling, screw the tooling onto the center threaded hole on the shaft end via the threaded end of the pull screw. Adjust the positions of the parts fitted by the pull screw, ensuring a certain gap between the left buffer ring and the coupling, and between the right buffer ring and the anti-reverse ring, while keeping the other adjacent parts in close contact. Connect the high-pressure oil circuit of the manual expansion pump to the oil injection hole on the shaft end, and inject high-pressure oil into the shaft end through the manual expansion pump. When the pressure is sufficient, pull the coupling from the shaft end along the pull screw... When the coupling pops out to the right, the left and right buffer rings are made of nylon with good cushioning performance. The left and right buffer rings are located on the left and right sides of the hollow support frame, respectively. When the popped-out coupling hits the left buffer ring, the impact force is effectively removed by the buffering of the left and right buffer rings on the pull screw, the unloading of the hollow support frame, and the blocking of the anti-reverse ring. This prevents damage to the coupling or injury from popping out. At the same time, the end face of the coupling will not be scratched due to the protection of the left buffer ring. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the auxiliary tooling of this utility model.

[0010] Figure 2 for Figure 1 Front view.

[0011] Figure 3 for Figure 2 Sectional view along line AA.

[0012] Figure 4 for Figure 1 Exploded view of the parts.

[0013] Figure 5 This is a schematic diagram of using the auxiliary tooling of this utility model to disassemble the coupling.

[0014] Figure 6 This is a schematic diagram of the original method of disassembling the coupling using a propulsion cylinder and a push sleeve.

[0015] In the diagram: 1-Pull screw, 2-Left buffer retaining ring, 3-Hollow support frame, 4-Right buffer retaining ring, 5-Anti-reverse retaining ring, 6-Washer, 7-Anti-reverse nut. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments and accompanying drawings. In the description of the present invention, the directional terms "upper," "lower," "front," "rear," "left," and "right" are based on the accompanying drawings. Figure 1 The orientation or positional relationship shown is defined only for the convenience of describing this utility model, and does not refer to a specific orientation that the device or component must have, and should not be regarded as a limitation of this utility model.

[0017] like Figures 1-4As shown, this auxiliary tooling includes a horizontally arranged pull rod 1. The pull rod 1 is a long rod with threaded ends at both ends and a smooth middle section. From left to right, the pull rod 1 is fitted with a left buffer retaining ring 2, a hollow support frame 3, a right buffer retaining ring 4, a backstop retaining ring 5, and a washer 6, which can slide laterally along the rod. A backstop nut 7 is screwed onto the threaded end of the pull rod 1 on the right side of the washer 6. The left buffer retaining ring 2 is a vertically arranged, wide nylon retaining ring with a small inner hole. The outer diameter of the left buffer retaining ring 2 is larger than the diameter of the inner hole of the coupling. The left buffer retaining ring 2 has a fan-shaped notch extending from its inner hole to its outer edge, with an angle θ of 45° to 90°. The hollow support frame 3 has two centrally inserted... The two upright discs have the same outer diameter as the left buffer ring 2. The left disc has a fan-shaped notch with the same shape as the fan-shaped notch of the left buffer ring 2. The two discs are connected by multiple spaced connecting ribs to form a hollow support frame. Each connecting rib is completely offset from the central through hole of the two discs and the fan-shaped notch of the left disc. The right buffer ring 4 is a vertically set small inner hole wide nylon ring. The thickness, inner diameter and outer diameter of the right buffer ring 4 are the same as those of the left buffer ring 2. The anti-reverse ring 5 is an upright disc with a central through hole and an outer diameter the same as that of the right buffer ring 4. The washer 6 is a flat washer with an outer diameter smaller than that of the anti-reverse ring 5 and matched with the anti-reverse nut 7.

[0018] Furthermore, the pull rod 1 is made of 45# steel and has a blackened surface to maintain sufficient strength, toughness and corrosion resistance.

[0019] Furthermore, the left buffer ring 2 and the right buffer ring 4 are made of wide nylon with a small inner hole, a thickness of 15mm, an inner diameter of 20mm, and an outer diameter of 120mm, so as to provide sufficient strength and cushioning performance.

[0020] Furthermore, the hollow support frame 3 is welded from Q235A steel plate with a thickness of 12mm or more, and the surface is blackened to maintain sufficient strength and corrosion resistance.

[0021] Furthermore, the anti-reverse retaining ring 5 is made of Q235A steel plate with a thickness of 6mm and the surface is blackened.

[0022] Furthermore, the diameter of the pull rod 1 is 16mm and the length is 230mm; the overall length of the hollow support frame 3 is 110mm.

[0023] like Figure 5As shown, when using this auxiliary tooling to disassemble the coupling, first disassemble each part. Secure the threaded end of the pull screw 1 on the left side of the center threaded hole on the shaft end. Then, sequentially thread the left buffer retaining ring 2, hollow support frame 3, right buffer retaining ring 4, anti-reverse retaining ring 5, and washer 6 onto the pull screw 1. Screw the anti-reverse nut 7 onto the threaded end of the pull screw 1. Adjust the position of each part threaded onto the pull screw 1 so that there is a gap of approximately 10mm between the left buffer retaining ring 2 and the coupling, and between the right buffer retaining ring 4 and the anti-reverse retaining ring 5. Keep the other adjacent parts in close contact. Align the fan-shaped notch of the left buffer retaining ring 2 with the fan-shaped notch of the left disc of the hollow support frame 3 and rotate it until the oil filling hole on the shaft end is exposed. Connect the high-pressure oil circuit of the manual expansion pump to the oil filling hole on the shaft end. The head and pipeline pass through the fan-shaped notch of the left buffer ring 2 and the hollow support frame 3. The manual expansion pump is operated to inject high-pressure oil into the shaft end. When the pressure reaches about 200MPa, the coupling can be ejected from the shaft end along the pull screw 1 to the right. Since the left buffer ring 2 and the right buffer ring 4 are made of nylon with good buffering performance, and the left buffer ring 2 and the right buffer ring 4 are located on the left and right sides of the hollow support frame 3 respectively, the ejected coupling hits the left buffer ring 2, causing the parts on the pull screw 1 to stick together. Through the buffering of the left buffer ring 2 and the right buffer ring 4, the unloading of the hollow support frame 3, and the blocking of the anti-reverse ring 5, the impact force of the coupling can be effectively removed, avoiding damage to the coupling or injury from ejection. At the same time, due to the protection of the left buffer ring 2, the end face of the coupling will not be scratched.

[0024] The above illustrations are merely typical embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An auxiliary tooling for disassembling couplings, characterized in that: The auxiliary tooling is provided with a pull screw (1) arranged horizontally on both sides. The pull screw (1) is a long screw with threaded ends at both ends and a smooth middle section. The pull screw (1) is movably fitted with a left buffer retaining ring (2), a hollow support frame (3), a right buffer retaining ring (4), a backstop retaining ring (5), and a washer (6) that can slide horizontally along the rod body from left to right. A backstop nut (7) is screwed onto the threaded end of the pull screw (1) on the right side of the washer (6). The left buffer retaining ring (2) is a vertically arranged small inner hole wide nylon retaining ring. The outer diameter of the left buffer retaining ring (2) is larger than the diameter of the inner hole of the coupling. The left buffer retaining ring (2) has a fan-shaped notch extending from its inner hole to its outer edge. The opening angle θ of the fan-shaped notch is 45° to 90°. The hollow support frame (3) is provided with two belts on the left and right sides. The two discs are vertically positioned with a central perforation. The outer diameter of both discs is the same as that of the left buffer ring (2). The left disc has a fan-shaped notch with the same shape as the fan-shaped notch of the left buffer ring (2). The two discs are connected by multiple spaced connecting ribs to form a hollow support frame. Each connecting rib is completely offset from the central perforation of the two discs and the fan-shaped notch of the left disc. The right buffer ring (4) is a vertically positioned nylon ring with a small inner hole. The thickness, inner diameter, and outer diameter of the right buffer ring (4) are the same as those of the left buffer ring (2). The anti-reverse ring (5) is a vertically positioned disc with a central perforation and an outer diameter the same as that of the right buffer ring (4). The washer (6) is a flat washer with an outer diameter smaller than that of the anti-reverse ring (5) and matched with the anti-reverse nut (7).

2. The auxiliary tooling for disassembling couplings according to claim 1, characterized in that: The pull rod (1) is made of 45# steel and the surface is blackened.

3. The auxiliary tooling for disassembling couplings according to claim 1, characterized in that: The left buffer ring (2) and the right buffer ring (4) are made of wide nylon with a small inner hole, a thickness of 15mm, an inner diameter of 20mm, and an outer diameter of 120mm.

4. The auxiliary tooling for disassembling couplings according to claim 1, characterized in that: The hollow support frame (3) is made of Q235A steel plate with a thickness of more than 12mm and is blackened on the surface.

5. The auxiliary tooling for disassembling couplings according to claim 1, characterized in that: The anti-reverse retaining ring (5) is made of Q235A steel plate with a thickness of 6mm and the surface is blackened.

6. The auxiliary tooling for disassembling couplings according to claim 1, characterized in that: The diameter of the pull rod (1) is 16mm and the length is 230mm; the overall length of the hollow support frame (3) is 110mm.

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