Tool for disassembling bush of axle box spring lower clamping plate

Abstract

The utility model discloses an axle box spring lower clamping plate bush disassembling tool which comprises an expansion supporting unit capable of expanding outwards, a sliding rod connected to the tail of the expansion supporting unit, an impact end arranged at the tail end of the sliding rod and an impact block sliding on the sliding rod. A trapezoidal mechanism is constructed through the first connecting rod and the second connecting rod which are equal in length, so that by means of forward thrust of the push cylinder, parallel outward extension of the outer supporting chuck is effectively achieved, uniform stress between the chuck and the inner wall of the lining is guaranteed, local stress influence is eliminated, and the service life of the outer supporting chuck is prolonged; besides, by the adoption of an impact type external pulling method, kinetic energy output by workers can be stored and then output in a high-energy impact mode, so that force far larger than force generated in a conventional external pulling mode is obtained, and the requirement for the strength of the workers is reduced.

Description

TECHNICAL FIELD

[0001] The embodiment of the utility model belongs to bush dismounting technical field, more particularly, relate to a kind of axle box spring lower clamping plate bush dismounting tool. BACKGROUND

[0002] In CRH380A and CR400AF type motor train unit axle box spring maintenance operation, lower clamping plate bush often appears wear-out over-limit phenomenon.Due to lack of special dismounting tool, operating personnel usually uses chisel to carry out destructive removal, and this process takes about 30 minutes, and labor intensity is relatively large.For the bush that is difficult to dismount, the whole lower clamping plate is often replaced.Based on this, it is urgent to develop a kind of high-efficiency, convenient special dismounting tool to optimize maintenance process, reduce operating intensity and improve maintenance efficiency.

[0003] The bush dismounting scheme of inner support fixing and outward pulling in prior art can effectively realize dismounting effect, but still has the following technical problems: (1) inner support fixing refers to expansion through openable support head, so as to be pressed tightly with bush inner wall, and relative positioning with bush is realized.But the support claw of outer support mechanism in patent scheme is mostly rod type or plate type, for rod type support claw, contact area is small, and pressing and fixing effect is poor;for plate type support claw, in the expansion action of most schemes, plate claw is not kept parallel to the attitude of bush inner side wall, which leads to uneven stress of plate claw at each place and bush contact and extrusion, and local stress is generated, which seriously affects support head service life; (2) in outward pulling process, manual pulling is usually used to realize, and this way has higher requirement on worker's strength, and more labor-saving outward pulling technical scheme should be proposed. UTILITY MODEL CONTENTS

[0004] In view of the above defects or improvement needs of prior art, the utility model provides a kind of axle box spring lower clamping plate bush dismounting tool.Through the trapezoidal mechanism of equal-length first connecting rod and second connecting rod, the parallel expansion of outer support chuck is effectively realized by means of push cylinder front pushing force, the uniform stress between chuck and bush inner wall is guaranteed, local stress influence is eliminated, and the service life of outer support chuck is improved;in addition, through the impact type outer pulling, the kinetic energy of worker output can be stored and high-energy impact is realized, which is much larger than the force generated by conventional outward pulling mode, and the requirement on worker's strength is reduced.

[0005] In order to realize the above purpose, a kind of axle box spring lower clamping plate bush dismounting tool, comprising:

[0006] expandable inflation support unit, connecting rod, impact end, impact block

[0007] The expansion supporting unit comprises a base, a mounting cavity formed in the base, a linear telescopic push cylinder arranged in the mounting cavity, a telescopic rod as an output component of the linear telescopic push cylinder, a connecting block connected to the front end of the telescopic rod, a chuck retracting opening formed in the side wall of the mounting cavity, an outer supporting chuck accommodated in the chuck retracting opening, and an outer supporting driving assembly connected between the connecting block and the outer supporting chuck; the outer supporting driving assembly realizes parallel expansion of the outer supporting chuck.

[0008] The expansion supporting unit is inserted into the bushing hole, the linear telescopic push cylinder is controlled to extend, the outer supporting chuck is triggered to expand outward in parallel, and is tightly fixed with the inner side wall of the bushing, then the sliding impact block is manually and quickly pulled back to impact the impact end, so as to generate an outward pulling force.

[0009] Preferably, the outer supporting driving assembly comprises:

[0010] A bottom fixed block arranged directly below the connecting block and fixedly connected to the base, a coaxial limiting sliding shaft fixedly arranged below the connecting block, and first and second connecting rods rotatably connected between the connecting block, the bottom fixed block and the outer supporting chuck in a symmetrical state; the coaxial limiting sliding shaft is slidingly connected with the center of the bottom fixed block.

[0011] Preferably, the first connecting rod and the second connecting rod are equal in length.

[0012] Preferably, the outer supporting driving assembly comprises:

[0013] A first anti-rotation vertical guide groove formed in the side wall of the coaxial limiting sliding shaft, and a first clamping block in the center hole of the bottom fixed block; the clamping block is slidingly connected with the first anti-rotation vertical guide groove.

[0014] Preferably, a second anti-rotation vertical guide groove is arranged in the side wall of the sliding rod, and a second clamping block is arranged in the center hole of the impact block and slidingly connected with the second anti-rotation vertical guide groove.

[0015] Preferably, the impact surface of the impact end is provided with a first rubber pad.

[0016] Preferably, the impact surface of the impact block is provided with a second rubber pad, and a side handle is arranged on the side surface of the impact block.

[0017] Preferably, the outer supporting chucks are arranged in an annular equidistant array along the center line of the base, and the number of the outer supporting chucks is at least three.

[0018] Overall, compared with the prior art, the above technical scheme of the utility model can achieve the following beneficial effects:

[0019] The utility model discloses an exhaust top umbrella connecting structure one kind lower clamping plate bushing dismounting frock of axle box spring, through the equal length's first connecting rod and second connecting rod construction trapezoidal mechanism to the parallel external exhibition of outer support chuck with the aid of push cylinder front thrust is effectively realized, guaranteeed the even stress between chuck and bushing inner wall, eliminated the influence of local stress, improved the service life of outer support chuck, in addition, through the impact type outer pull, can realize the high energy impact of the energy storage of worker output, is much larger than the force generated by conventional outer pulling mode, reduces the strength requirement to worker master. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is whole structure schematic diagram of the utility model embodiment one kind lower clamping plate bushing dismounting frock of axle box spring;

[0021] Figure 2 It is whole structure schematic diagram of the utility model embodiment one kind lower clamping plate bushing dismounting frock of axle box spring in unfolded state;

[0022] Figure 3 It is expansion bracing unit contraction state schematic diagram of the utility model embodiment one kind lower clamping plate bushing dismounting frock of axle box spring;

[0023] Figure 4 It is expansion bracing unit unfolded state schematic diagram of the utility model embodiment one kind lower clamping plate bushing dismounting frock of axle box spring;

[0024] Figure 5 It is the first use state diagram of the utility model embodiment one kind lower clamping plate bushing dismounting frock of axle box spring;

[0025] Figure 6 It is the second use state diagram of the utility model embodiment one kind lower clamping plate bushing dismounting frock of axle box spring;

[0026] In all drawings, same reference signs represent same technical features, specifically: 1-expansion bracing unit, 100-base body, 101-linear telescopic push cylinder, 102-telescopic rod, 103-connection block, 104-chuck retraction opening, 105-outer support chuck, 110-outer support driving assembly, 111-first connecting rod, 112-bottom fixed block, 113-coaxial limiting sliding shaft, 114-second connecting rod, 115-first anti-rotation vertical guide groove, 2-sliding rod, 200-second anti-rotation vertical guide groove, 3-impact end, 300-first rubber pad, 4-impact block, 401-second rubber pad, 402-side handle, 5-bushing. DETAILED DESCRIPTION

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] 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 accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model. Furthermore, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0031] like Figures 1-6 As shown in this embodiment of the invention, the axle box spring lower clamping plate bushing disassembly tool includes:

[0032] An outwardly expandable expansion and tightening unit 1, a slide rod 2 connected to the tail of the expansion and tightening unit 1, an impact end 3 located at the end of the slide rod 2, and an impact block 4 sliding on the slide rod 2;

[0033] The expansion and tensioning unit 1 includes a base 100, an installation chamber opened in the base 100, a linear telescopic push cylinder 101 disposed in the installation chamber, a telescopic rod 102 serving as the output component of the linear telescopic push cylinder 101, a connecting block 103 connected to the front end of the telescopic rod 102, a chuck retraction port 104 opened in the side wall of the installation chamber, an external support chuck 105 retracted into the chuck retraction port 104, and an external support drive assembly 110 connecting the connecting block 103 and the external support chuck 105; the external support drive assembly 110 realizes the parallel outward extension of the external support chuck 105.

[0034] Insert the expansion and tightening unit into the bushing hole, and extend the linear telescopic push cylinder 101 by controlling it to trigger the outer support clamp 105 to extend outward in parallel and press and fix it against the inner side wall of the bushing. Then, manually and quickly pull back the sliding impact block 4 so that it hits the impact end 3 and generates an outward pulling force.

[0035] like Figure 3 As shown in this embodiment of the invention, the external support drive assembly 110 includes:

[0036] A bottom fixing block 112 is located directly below the connecting block 103 and fixedly connected to the base 100; a coaxial limiting slide shaft 113 is fixed below the connecting block 103; a first connecting rod 111 and a second connecting rod 114 are rotatably connected between the connecting block 103, the bottom fixing block 112, and the outer support clamp 105 while maintaining a symmetrical state; the coaxial limiting slide shaft 113 is slidably connected to the center of the bottom fixing block 112.

[0037] like Figure 3 As shown in the embodiment of this utility model, the first connecting rod 111 and the second connecting rod 114 are of equal length.

[0038] like Figure 3 As shown in this embodiment of the invention, the external support drive assembly 110 includes:

[0039] A first anti-rotation vertical guide groove 115 is formed on the side wall of the coaxial limiting slide shaft 113, and a first locking block is formed in the center hole of the bottom fixing block 112; the locking block is slidably connected to the first anti-rotation vertical guide groove 115.

[0040] like Figure 1 As shown in this embodiment of the utility model, the side wall of the slide bar 2 is provided with a second anti-rotation vertical guide groove 200, and the center hole of the impact block is provided with a second locking block that is slidably connected to the second anti-rotation vertical guide groove 200.

[0041] like Figure 1 As shown in this embodiment of the present invention, the impact surface of the impact end 3 is provided with a first rubber pad layer 300.

[0042] likeFigure 1 As shown in the utility model embodiment, the impact block 4 impact surface is equipped with the second rubber pad layer 401, and the side handle 402 is arranged on the side surface of the impact block 4.

[0043] The utility model working principle is:

[0044] S100: first, the expansion support unit is inserted into the to-be-disassembled bush hole, the linear telescopic push cylinder 101 is controlled to extend, under the action of the equal-length first connecting rod 111 and the second connecting rod 114, the supporting outer clamping head 105 is outwardly and parallelly expanded, and is tightly fixed with the inner wall of the bush,

[0045] S200: subsequently, the sliding impact block 4 is manually and quickly pulled back, and is impacted to the impact end 3, so that the outward pulling force is generated, and the bush is pulled out.

[0046] In the utility model embodiment, the equal-length first connecting rod 111 and the second connecting rod 114 build the trapezoidal mechanism, so that the parallel expansion of the supporting outer clamping head 105 is effectively realized by the push cylinder front thrust, the uniform stress between the clamping head and the inner wall of the bush is guaranteed, the local stress influence is eliminated, and the service life of the supporting outer clamping head 105 is improved; in addition, by adopting the impact type outer pulling, the kinetic energy of the worker output can be stored and high-energy impact is realized, which is much greater than the force generated by the conventional outer pulling mode, and the strength requirement of the worker master is reduced.

[0047] The above is only the preferred embodiment of the present application, and does not limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application. The above is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principle of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be regarded as the protection scope of the present application.

Claims

1. A tool for dismounting a gudgeon bush of a axle box spring lower clamp plate, characterized in that, The utility model relates to a kind of inflatable expansion support unit (1), connecting rod (2) connected to the tail of the inflatable expansion support unit (1), impact end (3) provided at the end of the connecting rod (2), impact block (4) sliding in the connecting rod (2);The inflatable expansion support unit (1) includes base body (100), installation chamber being opened in the base body (100), linear telescopic push cylinder (101) being provided in the installation chamber, telescopic rod (102) as the output component of linear telescopic push cylinder (101), connecting block (103) connected to the front end of the telescopic rod (102), chuck retraction opening (104) being opened in the side wall of the installation chamber, outer support chuck (105) being stored in the chuck retraction opening (104), outer support drive assembly (110) being connected between the connecting block (103) and outer support chuck (105);The outer support drive assembly (110) realizes parallel expansion of outer support chuck (105). The inflatable expansion support unit is inserted into the bushing hole, the linear telescopic push cylinder (101) is controlled to extend, the outer support chuck (105) is triggered to expand outward in parallel, and is tightly fixed with the inner side wall of the bushing, then the sliding impact block (4) is quickly pulled back manually, and is impacted to the impact end (3), to generate outward pulling force. The outer support drive assembly (110) includes: Bottom fixed block (112) being provided at the bottom of the connecting block (103) and being fixedly connected to the base body (100), coaxial limiting sliding shaft (113) being fixed to the bottom of the connecting block (103), first connecting rod (111) and second connecting rod (114) being rotatably connected between the connecting block (103), the bottom fixed block (112) and the outer support chuck (105) and keeping symmetrical state, the coaxial limiting sliding shaft (113) is slidably connected with the center of the bottom fixed block (112).

2. The axle box spring lower clamping plate bushing dismounting tool according to claim 1, characterized in that, The first connecting rod (111) and the second connecting rod (114) are equal in length. The outer support drive assembly (110) includes:

3. The axle box spring lower clamping plate bushing dismounting tool according to claim 2, characterized in that, First anti-rotation vertical guide groove (115) being opened in the side wall of the coaxial limiting sliding shaft (113), first clamping block in the center hole of the bottom fixed block (112), the clamping block is slidably connected with the first anti-rotation vertical guide groove (115).

4. The axle box spring lower clamping plate bushing dismounting tool according to claim 2, characterized in that, Second anti-rotation vertical guide groove (200) is provided in the side wall of the connecting rod (2), and second clamping block is provided in the center hole of the impact block and slidably connected with the second anti-rotation vertical guide groove (200). First rubber pad layer (300) is provided on the impact surface of the impact end (3).

5. The axle box spring lower clamping plate bushing dismounting tool according to claim 1, characterized in that, Second rubber pad layer (401) is provided on the impact surface of the impact block (4), and side handle (402) is provided on the side surface of the impact block (4).

6. A spring plate bushing puller for a journal box as defined in claim 1 wherein, The outer support chucks (105) are arranged in annular equidistant array along the center line of the base body (100), and the outer support chucks (105) are at least 3.

7. A tool for removing a lower spring plate bushing of a journal box, according to claim 1, characterized in that, ​ 8. A spring plate bushing dismounting tool for a journal box according to claim 1, characterized in that: ​

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