Bearing puller
By designing a bearing puller, the bearing is opened in the inner hole of the bearing by the expansion sleeve and the bearing is removed by friction. This solves the problem of the difficulty in removing bearings in blind holes, reduces the scrap rate and production costs.
Patent Information
- Application Number
- CN202422857199.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The lack of pullers suitable for blind bore bearings on the market makes it difficult to remove them, resulting in a high scrap rate.
A bearing puller was designed, including a puller and a push rod. It uses an expansion sleeve to open in the inner hole of the bearing and uses friction to remove the bearing. The structure is simple and easy to process and manufacture.
This effectively reduced the scrap rate of blind bore bearings and lowered production costs.
Smart Images
Figure CN223630299U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of drawing device, specifically relates to a bearing drawing device. BACKGROUND
[0002] In the mechanical maintenance industry, many manual operation maintenance tools will be used. Bearings are a typical class of parts used frequently in various products, and generally cannot be removed after installation. When removal is required, a general drawing device can be used for outer bearing, and the appropriate drawing device jaw size is selected according to the size, and the bearing is disassembled.
[0003] However, for bearings in blind holes, it is difficult to replace them because there is no gap in the shaft hole. Moreover, the drawing of bearings with small inner diameters cannot be handled, especially bearings at the bottom of blind holes. At present, there is no drawing device suitable for bearings in blind holes on the market. Therefore, bearings in blind holes can only be scrapped and not used. INVENTION CONTENTS
[0004] The utility model aims at the problem that there is no drawing device suitable for bearings in blind holes on the market at present, and provides a bearing drawing device that can effectively remove bearings in blind holes, thereby reducing the scrap rate of bearings in blind holes.
[0005] A bearing drawing device includes a drawing part and a top rod.
[0006] The drawing part has a drawing inner hole that matches the outer diameter of the top rod. One end of the drawing part has an expansion sleeve that extends into the inner hole of the bearing to be removed. The expansion sleeve has an expansion inner hole coaxially arranged with the drawing inner hole. The expansion inner hole has a smaller diameter than the outer diameter of the embedded end of the top rod. When the embedded end of the top rod extends into the expansion inner hole, the outer side surface of the expansion sleeve can abut against the inner hole of the bearing.
[0007] Further, the expansion sleeve includes at least two abutting parts. All abutting parts are fixed to the end of the drawing part, and all abutting parts are spaced along the axial direction of the drawing part.
[0008] Each abutting part has an inner arc surface and an outer arc surface. All inner arc surfaces form the expansion inner hole, and all outer arc surfaces form the outer side surface of the expansion sleeve.
[0009] Further, the expansion inner hole is a tapered hole, and the opening diameter of the tapered hole gradually increases in the direction from the expansion sleeve to the middle position of the drawing part.
[0010] Further, the shape of the embedded end of the top rod matches the shape of the tapered hole.
[0011] Further, the outer side surface of the expansion sleeve is a conical surface, and the opening diameter of the conical surface gradually increases in the direction along the expansion sleeve to the middle position of the drawing part.
[0012] Further, the ejector rod is screwed with the drawing inner hole.
[0013] Further, a screwing part is arranged on the side of the ejector rod away from the embedding end, and at least one set of planar surfaces for screwing and clamping is arranged on the screwing part; at least one set of planar surfaces for screwing and clamping is arranged on the outer surface of the drawing part.
[0014] Further, a support seat is further arranged; a stepped hole is arranged in the support seat and penetrates the top surface and the bottom surface of the support seat, and the small hole in the stepped hole is screwed with the outer side surface of the drawing part, and the large hole in the stepped hole is used for loading the bearing taken out from the blind hole.
[0015] In use, the bottom surface of the support seat is abutted to the workpiece, and the bearing is taken out from the blind hole by screwing the support seat and the drawing part.
[0016] Further, at least one set of planar surfaces for screwing and clamping is arranged on the outer surface of the support seat.
[0017] Further, the drawing part, the ejector rod and the support seat are made of stainless steel 40Cr13 material.
[0018] The beneficial effects of the utility model are as follows:
[0019] The utility model provides a blind hole bearing drawing device. In use, first, the expansion sleeve at the end of the drawing part is embedded in the inner hole of the bearing in the blind hole; then, the position of the ejector rod in the drawing inner hole is adjusted until the embedding end of the ejector rod extends into the inner hole of the expansion sleeve and the expansion sleeve is opened to make the outer part of the expansion sleeve abut in the inner hole of the bearing; then, the acting force is applied to the drawing part, and the bearing inner hole is taken out from the blind hole by using the friction force between the expansion sleeve and the bearing inner hole.
[0020] The bearing drawing device provided by the utility model has the advantages of simple structure, convenient operation, easy processing and manufacturing, and can effectively take out the bearing from the blind hole, so that the scrap rate of the bearing in the blind hole is reduced, and the production cost is reduced. DRAWINGS
[0021] Figure 1 It is a three-dimensional structure schematic view of the embodiment.
[0022] Figure 2 It is a three-dimensional sectional structure schematic view of the embodiment.
[0023] Figure 3 It is a structure schematic view of the drawing part.
[0024] Figure 4 A schematic view of a cross-sectional structure of the drawing member.
[0025] Figure 5 A schematic view of a structure of the ejector rod.
[0026] Figure 6 A schematic view of a structure of the support seat.
[0027] Figure 7 A schematic view of a cross-sectional structure of the support seat.
[0028] Reference signs:
[0029] 1-drawing member, 11-drawing inner hole, 12-bush, 121-bush inner hole, 122-abutment member, 1221-inner arc surface, 1222-outer arc surface, 2-ejector rod, 21-embedded end, 22-screwing part, 3-support seat, 31-stepped hole. DETAILED DESCRIPTION
[0030] In the following, example embodiments will be described more fully with reference to the accompanying drawings, in which example embodiments can be embodied in different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided as part of disclosure and to fully convey the scope of the present application to those skilled in the art.
[0031] In the case of no conflict, each feature in the embodiments of the present application and the embodiments can be combined with each other.
[0032] As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0033] The terms used in the present application are only used to describe particular embodiments, and are not intended to limit the present application. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
[0034] When the terms "comprise" and / or "comprising," or "consist of" and / or "consisting of" are used in this specification, including the claims, it is meant that the specified features, integers, steps, operations, elements, and / or components are present but not excluding the presence of one or more additional features, integers, steps, operations, elements, components, and / or groups thereof.
[0035] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present application, and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.
[0036] In view of the problem that there is no bearing puller suitable for blind hole bearing in the market at present, the bearing puller can effectively take out the bearing in the blind hole, thereby reducing the scrap rate of the bearing in the blind hole.
[0037] As shown in the figure, the embodiment provides a bearing puller, which comprises a pulling piece 1 and a top rod 2. The inside of the pulling piece 1 is provided with a pulling inner hole 11 matched with the outer diameter of the top rod 2. One end of the pulling piece 1 is provided with an expansion sleeve 12, which has an expansion sleeve inner hole 121 coaxially arranged with the pulling inner hole 11. The diameter of the expansion sleeve inner hole 121 is smaller than the outer diameter of the embedded end 21 of the top rod 2. Figures 1 to 7 In the embodiment, the end of the top rod 2 embedded in the pulling inner hole 11 is the embedded end 21 of the top rod 2.
[0038] In use, the expansion sleeve 12 at the end of the pulling piece 1 is embedded in the bearing inner hole in the blind hole. Then, the position of the top rod 2 in the pulling inner hole 11 is adjusted until the embedded end 21 of the top rod 2 extends into the expansion sleeve inner hole 121 and expands the expansion sleeve 12, so that the outside of the expansion sleeve 12 abuts against the bearing inner hole. Then, an acting force is applied to the pulling piece 1, and the bearing inner hole is taken out from the blind hole by using the friction force between the expansion sleeve 12 and the bearing inner hole.
[0039] The bearing puller provided by the embodiment has simple structure, convenient operation, easy processing and manufacturing, and can effectively take out the bearing from the blind hole, so as to reduce the scrap rate of the bearing in the blind hole and reduce the production cost.
[0040] In the embodiment, the expansion sleeve 12 comprises at least two abutting pieces 122. As shown in the figure, each abutting piece 122 is provided with an inner arc surface 1221 and an outer arc surface 1222. All the inner arc surfaces 1221 jointly constitute the expansion sleeve inner hole 121, and all the outer arc surfaces 1222 jointly constitute the outer circumferential surface of the expansion sleeve 12. In the embodiment, all the abutting pieces 122 are fixedly arranged at the end of the pulling piece 1, and all the abutting pieces 122 are arranged at equal intervals along the axial direction of the pulling piece 1.
[0041] Figure 3 In use, after the embedded end 21 of the top rod 2 extends into the expansion sleeve inner hole 121 jointly constituted by all the inner arc surfaces 1221, the diameter of the expansion sleeve inner hole 121 is smaller than the outer diameter of the embedded end 21 of the top rod 2, so that the embedded end 21 of the top rod 2 can expand all the abutting pieces 122, so as to firmly abut the outer arc surfaces 1222 of all the abutting pieces 122 against the bearing inner hole.
[0042] Preferably, the expansion sleeve 12 in the embodiment can comprise three abutting pieces 122 or four abutting pieces 122, and all the abutting pieces 122 are arranged at equal intervals at the end of the pulling piece 1.
[0043] Preferably, the expansion sleeve 12 in the embodiment can comprise three abutting pieces 122 or four abutting pieces 122, and all the abutting pieces 122 are arranged at equal intervals at the end of the pulling piece 1.
[0044] Furthermore, to facilitate the insertion of the push rod 2's embedded end 21 into the expansion sleeve's inner hole 121, the expansion sleeve's inner hole 121 in this embodiment is preferably a tapered hole, and the opening diameter of the tapered hole gradually increases along the direction from the expansion sleeve 12 to the middle position of the drawing member 1. In this case, the shape of the push rod 2's embedded end 21 in this embodiment can be selected to match the shape of the tapered hole.
[0045] Furthermore, in order to facilitate a better fit between the outer circumferential surface of the expansion sleeve 12 and the bearing inner hole, the outer circumferential surface of the expansion sleeve 12 in this embodiment is preferably a conical surface, and the opening diameter of the conical surface gradually increases in the direction from the expansion sleeve 12 to the middle position of the drawing member 1.
[0046] In this embodiment, the position adjustment method of the insertion end 21 of the push rod 2 relative to the inner hole 11 is not limited. For ease of implementation, the position of the insertion end 21 of the push rod 2 in the inner hole 11 of the pull rod 2 can be adjusted directly by pushing, or the position of the insertion end 21 of the push rod 2 in the inner hole 121 of the expansion sleeve can be adjusted directly by pushing.
[0047] Preferably, to facilitate stable adjustment of the position of the insert end 21 of the push rod 2 relative to the inner hole 11, this embodiment allows the push rod 2 to be threaded into the inner hole 11. Furthermore, to facilitate tightening between the pull member 1 and the push rod 2, this embodiment provides a tightening part 22 on the side of the push rod 2 away from the insert end 21, such as... Figure 5 As shown, the screwing part 22 is provided with at least one set of planes for screwing and clamping, and in this embodiment, at least one set of planes for screwing and clamping is provided on the outer surface of the pulling member 1.
[0048] Specifically, in this embodiment, the drawing member 1 is preferably a tubular structure with a threaded inner hole and a set of opposing planes milled on its outer circumference for clamping during tightening. In this embodiment, the push rod 2 has external threads on its outer circumference. One end of the push rod 2 is an insert end 21, which is machined into a conical structure, and the shape of the conical structure matches the shape of the inner hole 121 of the expansion sleeve. The other end of the push rod 2 is a tightening part 22. Preferably, the tightening part 22 can be a columnar structure with a set of opposing planes milled on its outer circumference for clamping during tightening.
[0049] When removing the bearing from the blind hole, the puller 1 can be pulled directly to remove the bearing from the blind hole.
[0050] Preferably, to facilitate smooth and efficient removal of the bearing from the blind hole, the bearing puller provided in this embodiment further includes a support base 3. For example... Figure 7As shown, the support seat 3 in the embodiment is provided with a stepped hole 31 penetrating the top surface and the bottom surface of the support seat 3, and the small hole in the stepped hole 31 is threadedly matched with the outer circumferential surface of the drawing member 1, and the large hole in the stepped hole 31 is used to load the bearing taken out from the blind hole.
[0051] In use, the drawing member 1 is first screwed into the support seat 3; then the support seat 3 is placed on the workpiece, and the large hole of the stepped hole 31 in the support seat 3 is aligned with the bearing to be taken out; then the support seat 3 and the drawing member 1 are screwed to make the expansion sleeve 12 in the drawing member 1 extend into the inner hole of the bearing to be taken out; then the top rod 2 is placed in the drawing inner hole 11, and the support seat 3 and the drawing member 1 are screwed to make the outer circumferential surface of the expansion sleeve 12 in the drawing member 1 tightly abut against the inner hole of the bearing to be taken out; finally, the support seat 3 and the drawing member 1 are screwed to smoothly take out the bearing from the blind hole.
[0052] Further, all the structural members in the bearing drawing device provided by the embodiment can be made of stainless steel 40Cr13 material, and the hardness thereof can reach 30-35HRC after heat treatment, so as to improve the service life.
[0053] Example embodiments have been disclosed herein and, although the use of specific terms is exemplified throughout this specification, they are used in this context only as illustrative and not for purposes of limitation. In some embodiments, it will be apparent to those skilled in the art from this disclosure that the use of certain of these described features, components, and / or elements can, depending upon the specific application, be combined in other ways than is explicitly indicated herein. Thus, the skilled artisan will appreciate that various modifications can be made to the method and structure disclosed herein without departing from the scope of the present inventive concept, which is set forth in the appended claims.
Claims
1. A bearing puller, characterized in that: Includes pull-out components and push rods; The drawing member has a drawing inner hole that matches the outer diameter of the push rod. One end of the drawing member has an expansion sleeve for extending into the inner hole of the bearing to be removed. The expansion sleeve has an expansion sleeve inner hole that is coaxially arranged with the drawing inner hole. The diameter of the expansion sleeve inner hole is smaller than the outer diameter of the push rod insertion end. In use, after the push rod insertion end extends into the expansion sleeve inner hole, the outer surface of the expansion sleeve can abut against the inner hole of the bearing.
2. The bearing puller according to claim 1, characterized in that: The expansion sleeve includes at least two abutting members, all of which are fixed to the end of the pull-out member, and all abutting members are spaced apart along the axial direction of the pull-out member; Each abutting part has an inner arc surface and an outer arc surface, and all the inner arc surfaces together form the inner hole of the expansion sleeve, and all the outer arc surfaces together form the outer surface of the expansion sleeve.
3. The bearing puller according to claim 1, characterized in that: The inner hole of the expansion sleeve is a tapered hole, and the opening diameter of the tapered hole gradually increases along the direction from the expansion sleeve to the middle position of the drawing member.
4. The bearing puller according to claim 3, characterized in that: The shape of the insert end of the push rod is adapted to the shape of the tapered hole.
5. The bearing puller according to claim 1, characterized in that: The outer surface of the expansion sleeve is a conical surface, and the opening diameter of the conical surface gradually increases in the direction from the expansion sleeve to the middle position of the drawing member.
6. The bearing puller according to any one of claims 1-5, characterized in that: The push rod is threaded into the inner hole of the pull-out hole.
7. The bearing puller according to claim 6, characterized in that: The top rod has a screwing part on the side away from the insertion end, and the screwing part has at least one set of planes for screwing and clamping; the outer surface of the puller has at least one set of planes for screwing and clamping.
8. The bearing puller according to any one of claims 1, 2, 3, 4, 5 or 7, characterized in that: It also includes a support base; the support base has a stepped hole that penetrates the top and bottom surfaces of the support base, and the small hole in the stepped hole is threaded to the outer surface of the drawing member, and the large hole in the stepped hole is used to load the bearing taken out from the blind hole; In use, the bottom surface of the support base abuts against the workpiece, and the bearing is pulled out of the blind hole by screwing the support base and the puller.
9. The bearing puller according to claim 8, characterized in that: The outer surface of the support base is provided with at least one set of planes for screwing and clamping.
10. The bearing puller according to claim 8, characterized in that: The puller, the push rod, and the support are made of 40Cr13 stainless steel.