CN219293852U - A tool for removing bearings - Google Patents

Abstract

The utility model belongs to the field of bearing repair, in particular to a tool for dismantling a bearing. There is a keyway on the corresponding side of the opening for the shaft through which the bearing is connected. The internal thread of the hole penetrates into the screw. . The use of the utility model enables the bearings to be evenly stressed, the disassembled bearings are intact, and the operation is simple, and a single person can complete the disassembly work.

Description

A tool for removing bearings

technical field

The utility model belongs to the field of bearing repair, in particular to a tool for dismantling a bearing.

Background technique

Bearing is an important component in contemporary equipment machinery. Its main function is to support the mechanical rotating body, reduce the friction coefficient during mechanical movement, and ensure its rotation accuracy. The bearing is installed in the bearing chamber. After the factory is used, if the bearing is used abnormally, it is generally necessary to take the bearing out of the bearing chamber without damage, so as to carry out objective technical analysis on the abnormality of the bearing.

When the bearing fails and needs to be replaced, the bearing and the shaft belong to an interference fit, so its disassembly is more difficult. The traditional method of disassembling the bearing is relatively rough. Generally, there are two methods:

1) Using the method of thermal expansion and contraction, put the large shaft into the inner diameter of the bearing inner ring, tighten the inner ring of the bearing and pull the bearing out forcefully, the bearing is damaged when taken out.

2) Cut and disassemble the bearing cage, and take out the parts one by one.

The above two methods may cause damage to the machine body or the wheel shaft due to the uneven force on the bearing, which may seriously cause the wheel shaft to break, virtually increase the maintenance cost and increase the work intensity. In addition, the work efficiency is low and it is not easy to disassemble.

Utility model content

The technical problem to be solved by the utility model is to provide a tool for dismantling the bearing which reduces the maintenance cost and does not damage the bearing structure.

The utility model is achieved in this way, a tool for dismounting a bearing, the tool includes: a bearing fixing piece, the bearing fixing piece is a square tube, one side of the square tube has a hole, and the side of the hole corresponds to the surface There is a keyway through which the shaft connected by the bearing passes through. The internal thread of the hole penetrates into the screw rod. A borrowing hole is arranged on the top of the screw rod, and an operating stick is inserted in the borrowing hole.

Further, the length of the keyway is half of the length of the square tube.

Further, on one side of the opening of the square tube, a horizontal nut is welded at a position corresponding to the hole.

Further, the borrowing hole is formed on the top of the screw by welding a vertical nut.

Further, the round steel rods are provided with threads that cooperate with the vertical nuts.

Further, the screw rod is a fully threaded bolt rod, and the other end of the screw rod is tapered.

Further, the other two sides of the square tube are symmetrically formed with triangular notches, and the top corners of the triangular notches are at half the length of the square tube.

Further, adjustment plates are provided on both sides of the keyway, and the distance between the two adjustment plates is adjusted by connecting screws passing through the sides of the adjustment plates.

Compared with the prior art, the utility model has the beneficial effects that: the utility model makes the bearing bear uniform force, the disassembled bearing is intact, and the operation is simple, and a single person can complete the disassembly work.

Description of drawings

Fig. 1 is the tool structure schematic diagram that the utility model embodiment provides;

Fig. 2 is a schematic structural view of the keyway at the bottom of the tool provided by the embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, a tool for dismounting a bearing includes: a bearing fixture, the bearing fixture adopts a square tube 7, the square tube includes four sides, and is an axially transparent structure, and one side of the square tube has holes 5 There is a keyway on the side corresponding to the side of the hole through which the shaft connected by the bearing passes. The position of the hole corresponds to the keyway. The inner side of the hole is provided with threads, which can penetrate the screw 3. The top of the screw is provided with a borrowing hole, and the borrowing hole 2 Insert the operating stick 1 inside.

As shown in Figure 2, in order to allow the shaft connected to the bearing to pass through the keyway 11, the center of the bearing corresponds to the top of the keyway, and the length of the keyway is set to half the length of the square tube, so that the end of the screw can correspond to the center of the bearing .

The square tube is on one side of the hole, and the position corresponding to the hole is welded with a horizontal nut 4, and the horizontal nut is provided for further fixing the screw rod firmly on the square tube.

The leverage hole in this embodiment is formed by welding a vertical nut on the top of the screw rod. It can be a nut or a hole without threads inside. It can be used to penetrate a round steel rod, and the round steel rod is provided with external threads on half the length. , can be matched with vertical nuts.

In this embodiment, the screw rod is a fully threaded bolt rod, and the other end of the screw rod is configured as a cone 8 that can be inserted into the center of the bearing 9 .

In order to observe whether the center of the bearing is just at the top of the keyway during operation, a triangular notch 6 is symmetrically opened on the other two sides of the square tube, and the vertex of the triangular notch is at half the length of the square tube.

In another embodiment, in order to fit more sizes of bearing-connected shafts 10 into the keyway, the keyway is set to a large size, and adjustment plates 12 are arranged on both sides of the keyway, and the bottom of the square tube is thickened , the adjusting plate adjusts the distance between the two adjusting plates by connecting the screws 13 passing through both sides of the bottom.

The dynamic working process is:

Put the bearing to be taken out in the square tube, insert the round steel rod into the upper welded vertical nut, put the tapered end of the screw on the center of the bearing, and fix the bearing between the screw and the two sides of the bottom support, the round steel The stick can rotate clockwise and counterclockwise, thereby driving the whole tool to drive the bearing to rotate counterclockwise, so that the bearing is evenly stressed and can be taken out without damage.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (8)

1. A tool for removing a bearing, the tool comprising: the bearing fixing piece is a square tube, a side face of the square tube is provided with a hole, a key slot through which a shaft connected by a bearing passes is formed in a face corresponding to one face of the hole, threads in the hole penetrate into a screw rod, a force borrowing hole is formed in the top of the screw rod, and an operating rod penetrates into the force borrowing hole.

2. The bearing removal tool of claim 1, wherein the keyway has a length that is one half the length of the square tube.

3. The bearing removal tool of claim 1, wherein the square tube is welded with a horizontal nut at a location corresponding to the hole on one side of the hole.

4. The tool for removing bearings of claim 1, wherein the force-aid holes are formed in the top of the screw by welding with a vertical nut.

5. The bearing removal tool of claim 4, wherein the lever is provided with threads for mating with a vertical nut.

6. A tool for removing a bearing as claimed in claim 1, wherein the screw is a full thread bolt shaft, and the other end of the screw is tapered.

7. The bearing removal tool as claimed in claim 1, wherein triangular notches are symmetrically formed on the other two sides of the square tube, and a vertex angle of each triangular notch is positioned at a position which is half of the length of the square tube.

8. A tool for removing a bearing according to claim 1, wherein the key slot is provided on both sides with adjusting plates which adjust the distance between the two adjusting plates by connecting screws passing through the sides.

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