Locomotive axle box body dismounting tool

Abstract

The utility model discloses a disassembling tool for a locomotive axle box body. The disassembling tool comprises a sleeve with an opening in one end and a pulling plate arranged on one side of the closed end of the sleeve. The inner diameter of the sleeve is not smaller than the diameter of the shaft end gland; a first bolt which is in threaded connection with the pulling plate is arranged at the center of the pulling plate, and at least three second bolts which are in threaded connection with the pulling plate are arranged around the first bolt; a plurality of pull rods penetrating through the pull plate are arranged on the pull plate around the first bolt, nuts are arranged at the ends, close to the pull plate, of the pull rods, and when the first bolt and the shaft end gland are coaxially arranged, the pull rods correspond to mounting holes in the end face of the shaft box body in position. According to the utility model, the axle box body is uniformly stressed in the withdrawing process, so that the situation that the axle box body is inclined due to stress when being withdrawn is avoided, a retainer, a roller, an inner ring and other parts in the axle box bearing are prevented from being stressed, and the risk of damage to the axle box bearing is eliminated.

Description

Technical Field

[0001] The utility model relates to a locomotive axle box disassembly tool, belonging to the technical field of locomotive vehicle wheel set axle box disassembly. Background Art

[0002] The axle box is an important part of the locomotive running gear. Figure 1 As shown, the locomotive axle box in the utility model includes an axle box body 7, a bearing 8 arranged inside the axle box body 7 and an axle end pressure cover 9 arranged at the end of the axle, and a mounting hole 10 for mounting the bearing end cover is arranged on the end face of the axle box body 7; the upper part of the axle box body 7 bears the weight of the entire vehicle, and the inner hole and the axle box bearing are clearance fit, and the axle box body needs to be disassembled when maintenance is required or quality problems occur.

[0003] Due to the deformation, rust, fretting corrosion and other phenomena of the inner hole of the axle box during the operation of the locomotive, the axle box cannot be separated from the axle box bearing normally and cannot be disassembled. If ordinary disassembly tools are used, it is easy to cause uneven force on the internal retainer, roller, inner ring and other parts of the axle box bearing, resulting in damage to the axle box bearing and the disassembly process is time-consuming and laborious. Utility Model Content

[0004] The utility model aims to provide a locomotive axle box disassembly tool to facilitate the disassembly of the axle box and avoid damage to the bearing due to uneven force.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A locomotive axle box disassembly tool, comprising a sleeve with an open end and a pull plate arranged on one side of the closed end of the sleeve; the inner diameter of the sleeve is not less than the diameter of the shaft end pressure cover; a first bolt threadedly connected to the pull plate is arranged at the center of the pull plate, and no less than three second bolts threadedly connected to the pull plate are arranged around the first bolt; a plurality of pull rods passing through the pull plate are arranged around the first bolt on the pull plate, and a nut is arranged at one end of the pull rod close to the pull plate, and when the first bolt and the shaft end pressure cover are coaxially arranged, the pull rod corresponds to the position of the mounting hole on the end face of the axle box.

[0007] Therefore, first, the sleeve is put on the shaft end pressure cover, and then the first bolt and the second bolt are installed on the pull plate, and then the tail end of the pull rod is connected and fixed to the mounting hole of the outer end cover of the shaft box. At this time, the first bolt and the second bolt will be against the end face of the closed end of the sleeve, and then several second bolts are continuously turned at the same time. The nut set at the head position of the pull rod will limit the displacement of the pull plate, so that the first bolt, the second bolt, the pull plate, and the pull rod drive the shaft box body to move at the same time, so that the shaft box body and the shaft box bearing are separated, and then the first bolt in the middle of the pull plate is turned to further remove the shaft box body. The pressure of the bolt is evenly applied to the sleeve, and at the same time, the sleeve contacts the shaft end pressure cover, so that the bearing is evenly stressed, and the shaft box body is disengaged in a straight line, which protects the bearing while also protecting the overall shape of the shaft box body.

[0008] According to the embodiments of the present invention, the present invention can be further optimized. The following is the technical solution formed after optimization:

[0009] In a specific embodiment, the pull plate is circular; a first threaded hole is opened at the center of the pull plate, and a first bolt is arranged at the first threaded hole, and at least three second threaded holes are opened on the pull plate and are evenly distributed around the axis of the pull plate, and the second threaded holes are arranged between the through hole and the first threaded hole; a second bolt is arranged in each of the second threaded holes.

[0010] In order to facilitate installation, in a specific embodiment, a plurality of evenly distributed through holes are opened around the axis of the pull plate, and a pull rod is arranged in each of the through holes.

[0011] In order to facilitate use and prevent the pull plate from accidentally falling during use, in a specific embodiment, a sleeve is sleeved on the pull rod, and the pull plate is located between the nut and the sleeve. In this way, the sleeve fixes the distance between the pull plate and the sleeve and between the pull plate and the shaft box, so that the pull plate will not fall off during operation.

[0012] In a specific embodiment, the distance between the inner wall of the sleeve and the outer wall of the sleeve is smaller than the distance H between the inner wall of the shaft box and the outer wall of the shaft end gland.

[0013] In order to adapt to axle boxes of different shapes and sizes, in a specific embodiment, a stepped groove is formed on the end surface of the opening end of the sleeve.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1) During the process of disassembling the axle box of the locomotive axle box disassembly tool of the utility model, since the disassembly force acts directly on the outer ring of the axle box bearing through the sleeve, the internal retainer, roller, inner ring and other components of the axle box bearing are prevented from being subjected to stress, thereby eliminating the risk of damage to the axle box bearing.

[0016] 2) The pull plate and the axle box are connected at six points, so that the axle box is evenly stressed during the removal process, avoiding the occurrence of force tilt when the axle box is removed. The multi-point force method is used at the initial stage of disassembly, and the disassembly force is stable to ensure that the axle box can be removed smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a locomotive axle box disassembly tool according to Embodiment 1 of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the pull plate of Example 1 of the utility model;

[0019] Figure 3 yes Figure 2 Cross-sectional view along the AA direction.

[0020] In the figure

[0021] 1-sleeve; 11-step groove; 2-pull plate; 21-first threaded hole; 22-second threaded hole; 23-through hole; 3-first bolt; 4-second bolt; 5-pull rod; 51-sleeve; 6-nut; 7-axle box; 8-bearing; 9-axle end pressure cover. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0023] Example 1

[0024] like Figure 1-Figure 3 As shown, the locomotive axle box disassembly tool of this embodiment includes a sleeve 1 with an opening at one end and a circular pull plate 2 arranged on one side of the closed end of the sleeve 1; a stepped groove 11 is opened at the end surface of the open end of the sleeve 1; the inner diameter of the sleeve 1 is larger than the diameter of the shaft end pressure cover 9, the outer diameter of the sleeve 1 is smaller than the distance H between the inner wall of the axle box 7 and the outer wall of the shaft end pressure cover 9, and the distance between the inner wall of the sleeve 1 and the outer wall of the sleeve 1 is smaller than the distance H between the inner wall of the axle box 7 and the outer wall of the shaft end pressure cover 9.

[0025] Six evenly distributed through holes 23 are provided on the pull plate 2 around the axis of the pull plate 2, and a pull rod 5 passing through the pull plate 2 is provided in each of the through holes 23. The head and tail ends of the pull rod 5 are threaded, a nut 6 is provided at the head of the pull rod 5, a sleeve 51 is sleeved on the pull rod 5, and the pull plate 2 is located between the nut 6 and the sleeve 51. The sleeve 51 fixes the distance between the pull plate 2 and the sleeve 1 and between the pull plate 2 and the shaft box 7, so that the pull plate 2 will not fall off during the working process.

[0026] A first threaded hole 21 is provided at the center of the pull plate 2, and a first bolt 3 is provided at the first threaded hole 21. Three second threaded holes 22 are also provided on the pull plate 2 and are evenly distributed around the axis of the pull plate 2. The second threaded holes 22 are provided between the through holes 23 and the first threaded holes 21. A second bolt 4 is provided in each of the second threaded holes 22. The first bolt 3 is an M24 bolt, and the second bolt is an M16 bolt. Meanwhile, the first threaded hole 21 is an M24 threaded hole that matches the first bolt 3, and the second threaded hole 22 is an M16 threaded hole that matches the second bolt 4.

[0027] The steps of using the locomotive axle box disassembly tool in this embodiment are as follows:

[0028] 1. Tie rod installation

[0029] Use an electric wrench to quickly install the six tie rods 3 on the shaft box body through the hexagonal head at the tail of the tie rod 5, and the step of the screw rod contacts the end face of the shaft box body.

[0030] 2. Sleeve installation

[0031] The sleeve 1 is mounted on the shaft end pressure cover 9, and the end face contacts the outer ring of the axle box bearing 8.

[0032] 3. Pre-installation of pull plate

[0033] Install three second bolts 4 (M16 bolts) in the first threaded holes 21 (M16 threaded holes) of the pull plate, and install one first bolt 3 (M24 bolt) in the second threaded hole 22 (M24 threaded hole) at the center of the pull plate 2.

[0034] 4. Pull plate installation

[0035] The pull plate 2 with pre-installed bolts is inserted into the pull rod 5 through the through hole 23, and the nut 6 is installed on the head of the pull rod 5 to fix the position of the pull plate 2. The tail ends of the six pull rods 5 are all threadedly connected and fixed to the mounting holes of the outer end cover of the axle box body 7. One end of the sleeve 51 contacts the axle box body 7, and the other end contacts the pull plate 2. The nut 6 is used to fix the position of the pull plate.

[0036] 5. Disassembly of the axle box

[0037] First, use a pneumatic wrench to alternately tighten the three second bolts 4 to make them contact and fit with the sleeve 1, and cause the shaft box body 7 and the shaft box bearing 8 to separate; after the shaft box body 7 and the shaft box bearing 8 are separated, use a pneumatic wrench to tighten the first bolt 3 at the center of the pull plate, quickly disassemble the shaft box body, completely separate the shaft box body and the shaft box bearing, and hang it down.

[0038] The locomotive axle box disassembly tool of this embodiment uses a six-point connection method to remove the axle box. At the initial stage of the operation, the axle box is opened at three points. After the axle box and the axle box bearing are separated, the middle breakthrough method is used to remove the axle box at a faster speed.

[0039] Six-point connection means using six screws to connect the mounting hole of the outer end cover of the axle box body with the tooling. Three-point opening means using three tooling bolts to apply force together at the initial stage of tooling to remove the axle box body to ensure that the axle box body is 100% removed.

[0040] The middle breakthrough means that after the axle box is disassembled and opened, the M24 tooling bolt is screwed into the threaded hole in the middle of the tooling with a pneumatic wrench to quickly and easily disassemble the axle box.

[0041] When the locomotive axle box disassembly tool of this embodiment is in use, the pressure of the bolts is evenly applied to the sleeve 1, and at the same time the sleeve 1 is in contact with the shaft end pressure cover 9, so that the force on the bearing 8 is even, and the axle box 7 is disengaged in a straight line, which protects the bearing while also protecting the overall shape of the axle box 7.

[0042] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art fall within the scope defined by the claims attached to this application.

Claims

1. A locomotive axle box disassembly tool, characterized by: It comprises a sleeve (1) with an open end and a pull plate (2) arranged on one side of the closed end of the sleeve (1); the inner diameter of the sleeve (1) is not less than the diameter of the shaft end gland (9); A first bolt (3) threadedly connected to the pull plate (2) is arranged at the center of the pull plate (2), and no less than three second bolts (4) threadedly connected to the pull plate (2) are arranged around the first bolt (3); A plurality of pull rods (5) passing through the pull plate (2) are arranged around the first bolt (3) on the pull plate (2), and a nut (6) is arranged at one end of the pull rod (5) close to the pull plate (2); when the first bolt (3) and the shaft end pressure cover (9) are coaxially arranged, the pull rod (5) corresponds to the position of the mounting hole (10) on the end surface of the shaft box body (7).

2. The locomotive axle box disassembly tool according to claim 1, characterized in that: The pull plate (2) is circular; a plurality of evenly distributed through holes (23) are formed on the pull plate (2) around the axis of the pull plate (2); and a pull rod (5) is disposed in each of the through holes (23).

3. The locomotive axle box disassembly tool according to claim 2, characterized in that: A first threaded hole (21) is formed at the center of the pull plate (2), and a first bolt (3) is arranged at the first threaded hole (21). No less than three second threaded holes (22) are also formed on the pull plate (2) and are evenly distributed around the axis of the pull plate (2). The second threaded holes (22) are arranged between the through holes (23) and the first threaded holes (21); and a second bolt (4) is arranged in each of the second threaded holes (22).

4. The locomotive axle box disassembly tool according to any one of claims 1 to 3, characterized in that: The pull rod (5) is sleeved with a sleeve (51), and the pull plate (2) is located between the nut (6) and the sleeve (51).

5. The locomotive axle box disassembly tool according to any one of claims 1 to 3, characterized in that: The distance between the inner wall of the sleeve (1) and the outer wall of the sleeve (1) is smaller than the distance H between the inner wall of the shaft box body (7) and the outer wall of the shaft end gland (9).

6. The locomotive axle box disassembly tool according to any one of claims 1 to 3, characterized in that: A stepped groove (11) is formed on the end surface of the opening end of the sleeve (1).

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