CN111890304A - A bearing removal tool - Google Patents

Abstract

The invention discloses a bearing dismantling tool, comprising a split step sleeve and an ejector rod. The split step sleeve and the ejector rod are respectively provided with matching threaded step sleeve threads and ejector rod threads. There is a flat, a second step, a positioning part and a first step, and a handle is arranged on the top rod. When in use, pass the split step sleeve through the inner hole of the bearing, the first step clamps the end face of the bearing, and the flat is clamped with a wrench, and the bearing can be ejected by rotating the ejector rod. The invention has the advantages of simple structure, low cost, convenient operation, quick disassembly of the bearing, and less damage to the bearing.

Description

A bearing removal tool

technical field

The invention relates to a mechanical disassembly tool, in particular to a bearing disassembly tool, and belongs to the technical field of mechanical assembly.

Background technique

Bearings are an important component in contemporary machinery and equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Due to improper installation or long-term use, the bearing is prone to loss of accuracy. At this time, the bearing needs to be disassembled and replaced with a new one.

Blind hole inner bearings are often disassembled by sliding hammer impact or pull-out method. When the sliding hammer is impacted, it is generally necessary to first connect an expansion sleeve to the lower part of the sliding hammer, and then tighten the bearing, and then pull out the bearing through the impact of the sliding hammer, which is complicated in operation. The bearing is pulled out, the operation is more laborious, and it is easy to damage the bearing. Pulling out the puller is a better method, but most of the pullers on the market are general-purpose. Due to the structural limitations of the puller, it is mostly suitable for bearings with larger inner holes, and there are very few pullers for small-bore bearings. In addition, most of the pullers on the market have the problems of many parts, complex structure and high cost.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a bearing disassembly tool which is not only simple in structure and low in cost, but also easy to operate and not easy to damage the bearing, aiming at the deficiencies of the above-mentioned existing bearing disassembly tool technology.

In order to solve the above technical problems, the technical solution adopted by the present invention is: a bearing disassembly tool, comprising a split step sleeve and a mandrel, the split step sleeve is provided with a first step, and the split step sleeve and There are matching threads on the ejector rod.

Preferably, a second step is further provided on the split step cover.

Preferably, a flat is provided on the split-type step sleeve.

Preferably, a positioning portion is provided on the split step sleeve, and the positioning portion is matched with the diameter of the inner hole of the bearing.

Preferably, the width of the slit between the two split bodies of the split step cover is greater than the difference between the diameter of the first step and the diameter of the positioning portion.

Preferably, a cut edge is provided on the first step of the split step cover.

Preferably, the ejector rod is a hexagon socket screw or a hexagon socket screw.

Preferably, a handle is also provided on the top rod.

Preferably, the first step is further provided with a toothed edge.

The beneficial effects of the present invention are as follows: the present invention includes a split step sleeve and an ejector rod, only two parts, and has a very simple structure and low cost. The split-type step sleeve is provided with a thread matching the ejector rod, and the split-type step sleeve is also provided with a first step, a flat, a positioning part and a second step. When using, the split-type step sleeve is inserted into the bearing hole first. , and then screw the mandrel into the thread of the split step sleeve. If necessary, use a wrench to hold the flat to prevent the split step sleeve from rotating with the inner ring of the bearing. Then rotate the mandrel to drive the split step sleeve and the bearing to move together. , Remove the bearing, easy to operate and not easy to damage the bearing.

Description of drawings

1 is a schematic diagram of the overall structure of a bearing disassembly tool of the present invention;

Figure 2 is a bottom view of a bearing removal tool of the present invention;

3 is a schematic view of a toothed edge trimming of a bearing removal tool of the present invention;

Fig. 4 is the first embodiment of a bearing removal tool of the present invention;

Figure 5 is a second embodiment of a bearing removal tool of the present invention;

In the figure: 1. Split step sleeve; 1-0 flat; 1-1 step sleeve thread; 1-2 second step; 1-3 positioning part; 1-4 first step; 1-5 trimming; 1- 6 Tooth trimming; 2, ejector rod; 2-1 ejector rod thread; 2-2 handle; 3, bearing; 4, bearing seat.

Detailed ways

The structure and operation of the present invention will be described with reference to Figures 1-5.

As shown in FIG. 1 , a bearing removal tool of the present invention includes a split stepped sleeve 1 and a top rod 2 . The split step sleeve 1 is provided with a flat 1-0, a step sleeve thread 1-1, a second step 1-2, a positioning portion 1-3 and a first step 1-4. The top rod 2 is provided with a top rod thread 2-1, which matches with the step sleeve thread 1-1.

1 and 4, the split stepped sleeve 1 is provided with a first step 1-4. After the two parts of the split stepped sleeve 1 are respectively passed through the inner hole of the bearing 3, the first step 1-4 is formed. The end face of the bearing 3 can be clamped, and then the bearing 3 can be pushed out.

1 and 4, a second step 1-2 is also provided on the split step sleeve 1. After the split step sleeve 1 is passed through the bearing 3, the second step 1-2 can be set to realize the split step The sleeve 1 is positioned in the axial direction to ensure that the threads on the two parts of the split stepped sleeve are axially aligned after the split stepped sleeve 1 is threaded onto the bearing 3 . The axial distance between the first step 1-4 and the second step 1-2 is equal to or slightly larger than the bearing thickness.

1 and 4, the diameter of the positioning part 1-3 matches the inner hole of the bearing 3, which is equal to or slightly smaller than the diameter of the inner hole of the bearing 3. After the split stepped sleeve 1 is passed through the inner hole of the bearing 3 , the positioning part 1-3 cooperates with the inner hole of the bearing 3 to ensure that the split stepped sleeve 1 is prevented from skewing when the bearing 3 is pushed out by the ejector rod 2 . When the mandrel 2 is rotated, it may happen that the split step sleeve 1 rotates with the inner ring of the bearing 3. By using a wrench to clamp the flat 1-0, the split step sleeve 1 is prevented from rotating with the inner ring of the bearing 3, so as to ensure The split stepped sleeve 1 reliably pushes out the bearing 3 .

1 , 2 and 4 , the slit width between the two parts of the split stepped sleeve 1 is greater than the difference between the diameter of the first step 1 - 4 and the diameter of the positioning portion 1 - 3 . When the slit width between the two parts of the split step cover 1 is greater than the difference between the diameter of the first step 1-4 and the diameter of the positioning part 1-3, the first step 1-4 after the two parts are merged The largest dimension of the bearing is smaller than the diameter of the positioning parts 1-3, that is, smaller than the inner hole of the bearing 3, so that the two split parts can be smoothly inserted into the bearing 3, and then the bearing 3 can be disassembled.

As shown in FIG. 2 , which is the bottom view of FIG. 1 , the first step 1 - 4 is provided with a cut edge 1 - 5 , and the cut edge 1 - 5 is linear. Since the diameter of the step at the lower end of the split step sleeve 1 is larger than the diameter of the positioning part 1-3, and the diameter of the positioning part 1-3 matches the inner hole of the bearing 3, in the case of insufficient slit width between the two parts, It may happen that the first step 1-4 cannot pass through the inner hole of the bearing. At this time, adding the trimming edge 1-5 can facilitate the split step sleeve 1 to pass through the inner hole of the bearing 3, and the operation is more convenient.

As shown in FIG. 3 , which is the bottom view of FIG. 1 , the first step 1 - 4 is further provided with a toothed cut edge 1 - 6 . With reference to Fig. 4, the bearing 3 in Fig. 4 is a needle roller bearing. Since its wall thickness is generally thin, if the first step 1-4 still adopts the annular structure, the positioning step of the bearing 3 limits the first step. 4, the diameter of the first step 4 can only be reduced accordingly, the contact area with the bearing 3 will also be reduced, and the strength will also be affected, thereby affecting its drawing effect. Setting the toothed edge 1-6 on the first step 1-4 can increase the contact area between the first step 1-4 and the bearing 3, improve the strength, and at the same time ensure that the bearing 3 can be pulled out reliably, Sufficient positioning steps are also left for bearing 3 . When the toothed edges 1-6 are provided on the first step 1-4, the bearing seat 4 needs to be provided with a toothed cavity matching the toothed steps, so that the toothed edges 1-6 can be inserted into the bearing seat 4 in the tooth cavity.

FIG. 4 shows the first embodiment of a bearing removal tool of the present invention. A handle 2-2 is also provided on the ejector rod 2, and the handle 2-2 can be used to directly remove the bearing 3 by manually rotating the ejector rod 2. It is easy to operate without tools.

Use process:

The following describes a method of using a bearing dismounting tool of the present invention with reference to FIG. 4 . When in use, firstly pass a part of the split step sleeve 1 through the inner hole of the bearing 3, the first step 1-4 faces downward, and after passing through the bearing 3, clamp the upper end face of the first step 1-4 under the bearing 3. On the end face, make the positioning part 1-3 fit with the inner hole of the bearing 3, install the other part of the split step sleeve 1 in the same way, and then turn the handle 2-2 of the ejector rod 2 by hand, along with the ejector rod. 2 is screwed in, the split stepped sleeve 1 is propped up by the ejector rod 2, and the positioning parts 1-3 fit with the inner hole of the bearing 3 to ensure that the split stepped sleeve 1 will not skew when the bearing 3 is ejected. After the ejector rod 2 touches the bottom surface of the bearing seat 4, continue to rotate the handle 2-2. At this time, it is possible that the split step sleeve 1 rotates with the inner ring of the bearing 3. By using a wrench to clamp the flat 1-0, The split stepped sleeve 1 can be prevented from rotating with the inner ring of the bearing 3. Continuing to rotate the ejector rod 2 will drive the split stepped sleeve 1 and the bearing 3 to move outward together until the bearing 3 is pushed out.

FIG. 5 shows a second embodiment of a bearing dismounting tool of the present invention, and the method for installing the split stepped sleeve 1 is the same as that in FIG. 4 . The difference is that the mandrel 2 in Figure 5 is a hexagon socket screw. Of course, the mandrel 2 can also be an external hexagon bolt. The operation requires the use of an internal hexagon wrench, a fixed wrench, an adjustable wrench, etc., or electric or pneumatic tools. Allen wrenches, sockets, etc. are used to make the operation more convenient and labor-saving. In addition, the bearing 3 shown in FIG. 5 is a deep groove ball bearing. When the ejector rod 2 is operated to push out the bearing 3, the split stepped sleeve 1 may rotate with the inner ring of the bearing 3. By using a wrench to clamp the flat 1-0, the split stepped sleeve 1 can be prevented from rotating with the inner ring of the bearing 3, so that the bearing 3 can be ejected reliably.

After adopting the above technical solution, the present invention provides the split stepped sleeve 1 and the ejector rod 2, and sets matching threads on the split stepped sleeve 1 and the ejector rod 2, and passes the split stepped sleeve 1 through the bearing 3 during use. In the inner hole, the first step 1-4 is stuck on the end face of the bearing 3, the wrench is stuck on the flat 1-0, the bearing 3 can be ejected by rotating the ejector rod 2, the structure is simple, the cost is low, the operation is convenient, and the bearing 3 can be quickly disassembled out, and it is not easy to damage the bearing 3.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. Inside.

Claims (9)

1. A bearing dismounting tool, comprising a split step sleeve (1) and a mandrel (2), characterized in that: the split step sleeve (1) is provided with a first step (1-4), and the split step sleeve (1) is provided with a first step (1-4). (1) and the ejector rod (2) are respectively provided with matching threaded step sleeve threads (1-1) and ejector rod threads (2-1). 2. A bearing removal tool according to claim 1, characterized in that a second step (1-2) is further provided on the split step sleeve (1). 3. A bearing removal tool according to claim 1, characterized in that a flat (1-0) is provided on the split stepped sleeve (1). 4. A bearing removal tool according to claim 1, characterized in that a positioning portion (1-3) is provided on the split stepped sleeve (1), and the positioning portion (1-3) is connected to the bearing (3) match the diameter of the inner hole. 5. A bearing removal tool according to claim 1, characterized in that the width of the slit between the two parts of the split step sleeve (1) is greater than the diameter and the positioning part of the first step (1-4) (1-3) The difference in diameter. 6 . The bearing removal tool according to claim 1 , wherein the first step ( 1 - 4 ) of the split step sleeve ( 1 ) is provided with a cut edge ( 1 - 5 ). 7 . 7. A bearing removal tool according to claim 1, characterized in that the ejector rod (2) is an inner hexagon screw or an outer hexagon screw. 8. A bearing removal tool according to claim 1, characterized in that a handle (2-2) is further provided on the top rod (2). 9. A bearing removal tool according to claim 6, characterized in that the first step (1-4) is further provided with a toothed edge (1-6).

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