A directional pressing tool for elastic bearings

Abstract

This invention belongs to the field of specialized tool design and relates to a directional press-fit tool for elastic bearings. It comprises a press rod, a guide post, a guide sleeve, a stop block, a base, a cylindrical pin, and a hexagonal head bolt. The present invention features a simple structure and convenient press-fit operation, significantly reducing the operator's difficulty and improving assembly efficiency. Furthermore, during the press-fit process, the elastic bearing is always correctly positioned relative to the fork, effectively ensuring press-fit quality and meeting the assembly requirements for mass production of such components. This press-fit tool has significant practical value and can be applied to similar component assembly techniques.

Description

Technical Field

[0001] The invention belongs to the field of special tool design and relates to a directional pressing tool for an elastic bearing. Background Art

[0002] When assembling a fork assembly, two elastic bearings need to be pressed into a set of concentric fork ear holes of the fork. Ensure that the flat surface on the shoulder of the elastic bearing is perpendicular to the ground of the fork and have a certain angle tolerance. At the same time, the two elastic bearings pressed are concentric. Figure 1 As shown. The press-fitting process for the two elastic bearings uses temperature differential assembly. This involves heating the fork to a certain temperature, keeping it warm for a period of time, and then, at the specified time, quickly pressing the elastic bearings into the two holes of the fork, ensuring their relative position. Currently, assemblers typically align the elastic bearings visually and press-fit them using simple tools. This makes it difficult to maintain the perpendicular angle tolerance between the flat surface of the shoulder of the press-fitted elastic bearing and the bottom surface of the fork. Furthermore, without any specific constraints, it's difficult for the center of the elastic bearing to align itself with the center of the hole in the fork. When the press-fitting force is in a different direction from the axial direction of the elastic bearing, it's difficult to ensure the concentricity of the two elastic bearings in the fork assembly. Summary of the Invention

[0003] The purpose of this new tool is to solve the problems of difficulty in press-fitting elastic bearings, inability to ensure the relative vertical position relationship between the elastic bearing and the fork-shaped piece, and non-concentricity of the two bearings. The present invention provides a design of an elastic bearing directional press-fitting tool with a simple structure, simple operation, and easy guarantee of the relative position relationship between the elastic bearing and the fork-shaped piece.

[0004] Technical Solution

[0005] A tool for directional press-fitting of elastic bearings comprises a press rod 1, a guide post 2, a guide sleeve 3, a limit block 4, a base 5, a cylindrical pin 6, and a hexagonal head bolt 7. The press rod 1 is a stepped shaft with a stepped hole at its center. The end face of the large hole is provided with a groove. The side walls of the groove are symmetrical relative to the center, and the side walls of the groove form a clearance fit with the two flat surfaces of the elastic bearing shoulder. The large hole of the stepped hole can accommodate the inner ring of the elastic bearing, preventing the press rod from squeezing the inner ring of the elastic bearing during press-fitting. The small hole of the stepped hole is the same size as the hole of the elastic bearing being press-fitted, and the small hole forms a clearance fit with the guide post 2. The large outer cylindrical surface of the large hole is provided with a trapezoidal boss, the upper plane of which is perpendicular to the side walls of the groove on the end face of the large cylinder. The small cylindrical portion of the stepped shaft of the pressure rod 1 serves as the shank. The guide post 2 is a cylindrical polished rod, its diameter matching the bore size of the press-fitted elastic bearing with a clearance fit. The guide sleeve 3 is cylindrical with a central through-hole that matches the bore size of the press-fitted elastic bearing. The outer diameter of the guide sleeve 3 matches the bore size of the fork lugs with a clearance fit. The limit block 4 is T-shaped, with a set of precision positioning holes and a set of bolt mounting holes at the bottom of each side of the T-shaped structure. Positioned by standard cylindrical pins 6 and fastened with standard hexagonal bolts 7, it is connected to the base 5 as a whole. The base 5 is a rectangular parallelepiped with a concave cavity on its upper surface that matches the shape of the fork lugs. A stepped hole is located at the bottom of the cavity. The two concentric holes of the stepped hole are larger than the outer diameter of the guide sleeve 3 and deeper than its height. This facilitates the sliding of the guide sleeve 3 during press-fitting of the elastic bearing without interfering with the press-fitted elastic bearing. The small hole in the stepped hole at the bottom of the cavity matches the hole size of the press-fitted elastic bearing and provides a clearance fit with the guide post 2. The upper surface of the base 5 is equipped with a set of positioning holes and a set of threaded holes, the spacing of which matches the spacing of the two sets of holes in the stop block 4. A groove is formed at one end of the base 5, with its two side walls symmetrically arranged relative to the center of the stepped hole at the bottom of the cavity. The distance between the bottom of the groove and the center of the stepped hole at the bottom of the cavity matches the distance between the fork ear hole and the bottom surface of the fork. This ensures that when the fork is placed in the base 5, the bottom surface of the fork is parallel to one side surface of the assembled stop block 4 and is correctly positioned.

[0006] Furthermore, the outer circumferential surface of the handle is provided with knurling, so that the operator can hold the pressing rod 1 tightly for easy press-fitting.

[0007] Furthermore, after the pressure rod 1 passes through the guide column and is pressed downward, the upper surface of the trapezoidal boss on the large cylinder of the pressure rod 1 is in sliding contact with one side of the limit block, thereby ensuring that the press-fitted elastic bearing has the correct position relative to the fork-shaped piece.

[0008] Furthermore, after the pressure rod 1 passes through the guide column 2 and is pressed downward, the holes of the pressure rod 1, the elastic bearing, the guide sleeve 3, and the fork ear of the fork are all concentric, ensuring that the pressure applied to the pressure rod 1 is concentric with the axial direction of the elastic bearing, so that the two elastic bearings pressed into the fork ear holes of the fork are concentric.

[0009] Furthermore, the pressure rod 1, the guide column 2, the guide sleeve 3, the limit block 4 and the base 5 are all made of metal.

[0010] Furthermore, the metal is specifically 45# steel.

[0011] Technical Effects

[0012] The present invention has a simple structure and convenient press-fitting operation, which greatly reduces the operator's press-fitting difficulty and improves the assembly efficiency. In addition, during the press-fitting process, the elastic bearing always has a relatively correct positional relationship with the fork-shaped member, effectively ensuring the press-fitting quality and meeting the assembly requirements of batch production of such components. This press-fitting tool has strong practical value and can be extended to the assembly technology of similar parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the fork assembly;

[0014] Figure 2 It is a schematic structural diagram of the present invention;

[0015] Figure 3 yes Figure 2 A top view of

[0016] Figure 4 yes Figure 3 AA sectional view;

[0017] Figure 5 is an axonometric diagram of the present application;

[0018] Figure 6 It is a structural diagram of the pressure rod.

[0019] Figure 7 It is a structural diagram of the base.

[0020] Among them, 1-pressure rod, 2-guide column, 3-guide sleeve, 4-limit block, 5-base, 6-cylindrical pin, 7-hexagonal head bolt DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the following embodiments. The following are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The present invention is described in further detail below: Figure 2-7-shown is a tool for directional press-fitting an elastic bearing, comprising a press rod 1, a guide post 2, a guide sleeve 3, a stopper 4, a base 5, a cylindrical pin 6, and a hexagonal bolt 7. The press rod 1 is a stepped shaft with a stepped hole in its center and a groove on the end face of the larger hole. The groove's side walls are symmetrical relative to the center, and its side walls form a clearance fit with the two flat surfaces of the elastic bearing's shoulder. The larger hole of the stepped hole accommodates the inner ring of the elastic bearing, preventing the press rod from squeezing the inner ring during press-fitting. The smaller hole of the stepped hole is the same size as the hole of the elastic bearing being press-fitted, and this hole forms a clearance fit with the guide post 2. A trapezoidal boss is formed on the larger outer cylindrical surface of the larger hole. Furthermore, the upper plane of the trapezoidal boss is perpendicular to the sidewalls of the groove on the end face of the larger cylinder. The smaller cylinder of the stepped shaft of the press rod 1 serves as a handle, and its outer cylindrical surface is knurled to facilitate gripping of the press rod 1 for press-fitting. The guide post 2 is a cylindrical, polished rod whose diameter matches the bore size of the press-fitted elastic bearing, providing a clearance fit. The guide sleeve 3 is a circular ring of a certain height, with a central through-hole that matches the bore size of the press-fitted elastic bearing. Furthermore, the outer diameter of the guide sleeve 3 matches the bore size of the fork lugs, also providing a clearance fit. The stopper 4 is T-shaped overall, with a set of precision positioning holes and a set of bolt mounting holes located at the bottom of the boss on either side. Standard cylindrical pins 6 are used for positioning and standard hexagonal bolts 7 for fastening, connecting the base 5 as a single unit. The base 5 is a rectangular parallelepiped overall structure, with a concave cavity on the top surface that matches the shape of the fork lugs. A stepped hole is located at the bottom of the cavity. The two concentric holes of the stepped hole are larger than the outer diameter of the guide sleeve 3 and deeper than its height. This facilitates the sliding of the guide sleeve 3 during press-fitting of the elastic bearing without interfering with the press-fitted elastic bearing. Furthermore, the small hole in the stepped hole at the bottom of the cavity is the same size as the hole of the press-fitted elastic bearing, and has a clearance fit with the guide column 2. Furthermore, the upper surface of the base 5 is provided with a set of positioning holes and a set of threaded holes, the spacing of these two sets of holes matching the spacing of the two sets of holes in the stop block 4. Furthermore, one end of the base 5 is provided with a groove, the two side walls of which are symmetrically arranged relative to the center of the stepped hole at the bottom of the cavity. The distance between the bottom of the groove and the center of the stepped hole at the bottom of the cavity matches the distance between the fork ear hole and the bottom surface of the fork, ensuring that when the fork is placed in the base 5, the bottom surface of the fork is parallel to one side surface of the assembled stop block 4 and is correctly positioned.

[0023] Furthermore, after the pressure rod 1 passes through the guide column and is pressed downward, the upper surface of the trapezoidal boss on the large cylinder of the pressure rod 1 is in sliding contact with one side of the limit block, thereby ensuring that the press-fitted elastic bearing has the correct position relative to the fork-shaped piece.

[0024] Furthermore, after the pressure rod 1 passes through the guide column 2 and is pressed downward, the holes of the pressure rod 1, the elastic bearing, the guide sleeve 3, and the fork ear of the fork are all concentric, ensuring that the pressure applied to the pressure rod 1 is concentric with the axial direction of the elastic bearing, so that the two elastic bearings pressed into the fork ear holes of the fork are concentric.

[0025] The practical process of the present invention is as follows:

[0026] Step 1: Clamp the base 5 in a vise so that its upper surface is level. Place the heated and insulated fork into the base 5 so that the fork ear holes roughly coincide with the center of the stepped hole of the concave cavity on the upper surface of the base 5, and the bottom surface of the fork fits in with the bottom surface of the groove on the side of the base 5 to ensure that the fork is firmly cushioned.

[0027] Step 2: Pass the guide column 2 through the fork ear hole of the fork piece and the stepped hole of the concave cavity of the base 5 in sequence, then insert the guide sleeve 3 into the guide column 2 and put it into the fork ear hole of the fork piece, ensuring that the fork piece is fixed relative to the base 5 except for the axial direction of the fork ear hole, and at the same time ensure that the bottom of the fork piece is parallel to the limit block 4.

[0028] Step 3: Place the flat surface of the shoulder of the elastic bearing against any side of the groove on the large cylindrical end face of the pressure rod 1 and insert it so that the large cylindrical end face of the pressure rod 1 fits with the side face of the shoulder of the elastic bearing, and insert the pressure rod 1 equipped with the elastic bearing into the guide column 2 so that the upper plane of the trapezoidal boss on the large cylinder of the pressure rod 1 fits with the phase block 4, and use a pressing tool to knock the head of the handle of the pressure rod 1 until the shoulder of the elastic bearing is completely fitted with the end face of the fork ear hole of the fork-shaped part, thus completing the press-fitting of the elastic bearing.

[0029] Step 4: Quickly remove the pressure rod 1 and the guide sleeve 3, and pass the fork ear hole of the fork without the elastic bearing through the guide column 2 and place it into the base 5. Then, pass the guide sleeve 3 through the guide column 2 and place it into the fork ear hole of the fork;

[0030] Step 5: Place the flat surface of the shoulder of the elastic bearing against any side of the groove on the large cylindrical end face of the positive pressure rod 1 and insert it so that the large cylindrical end face of the pressure rod 1 fits with the side face of the shoulder of the elastic bearing, and insert the pressure rod 1 equipped with the elastic bearing into the guide column 2 so that the upper plane of the large cylindrical upper boss of the pressure rod 1 fits with the phase block 4. Use a pressing tool to knock on the head of the handle of the pressure rod 1 until the shoulder of the elastic bearing is completely fitted with the end face of the fork ear hole of the fork-shaped part, thus completing the press-fitting of another elastic bearing.

[0031] Step 6: Remove the pressure rod 1, the guide column 2, and the fork-shaped piece with the elastic bearing assembled, thereby completing the assembly of the two elastic bearings.

[0032] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical terms and scientific terms) have the same meaning as generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have a meaning consistent with that in the context of the prior art, and will not be interpreted in an idealized or overly formal sense unless defined as herein. The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A directional press-fitting tool for an elastic bearing, characterized in that: It includes a pressure rod, a guide column, a guide sleeve, a limit block, a base, a cylindrical pin and a hexagonal bolt; the pressure rod is a stepped shaft as a whole, with a stepped hole in the center, a groove on the end face of the large hole, the side walls of the groove are symmetrical relative to the center, and the two side walls are clearance-matched with the two flat surfaces of the elastic bearing shoulder; the large hole of the stepped hole can accommodate the inner ring of the elastic bearing to avoid the pressure rod squeezing the inner ring of the elastic bearing during press-fitting; the small hole of the stepped hole is consistent with the hole size of the elastic bearing to be press-fitted, and the small hole is clearance-matched with the guide column; the large outer cylindrical surface of the large hole is provided with a trapezoidal boss, and the plane on the trapezoidal boss is perpendicular to the side walls of the groove on the end face of the large hole; the pressure rod is pressed into the hole of the elastic bearing ... The small cylinder of the stepped shaft of the rod is the handle; the guide column is a cylindrical polished rod, the diameter of which matches the hole size of the elastic bearing to be pressed, and is a clearance fit; the guide sleeve is a cylinder with a through hole in the center, which is consistent with the hole size of the elastic bearing to be pressed; the outer circle size of the guide sleeve matches the fork ear hole size of the fork-shaped part, and is a clearance fit; the overall structure of the limit block is T-shaped, and a group of precision positioning holes and a group of bolt mounting holes are provided at the bottom of both sides of the T-shaped structure, which are positioned by standard cylindrical pins and fastened with standard hexagonal bolts to make it connected to the base as a whole; the overall structure of the base It is a rectangular parallelepiped, with a concave cavity on the upper surface matching the shape of the fork ear of the fork-shaped piece, and a stepped hole of the base provided at the bottom of the concave cavity. The two holes of the stepped hole of the base are concentric, the size of the large hole is larger than the outer circle size of the guide sleeve, and the depth of the large hole is larger than the height of the guide sleeve, so that when the elastic bearing is press-fitted, the guide sleeve slides down and there is no interference with the press-fitted elastic bearing; the small hole of the stepped hole at the bottom of the concave cavity is consistent with the hole size of the press-fitted elastic bearing, and is clearance-matched with the guide column; a group of positioning holes and a group of threaded holes are provided on the upper surface of the base, and the hole spacing of adjacent positioning holes and threaded holes of the base is consistent with the adjacent positioning holes of the limit block. The hole spacing of the positioning hole and the bolt mounting hole is consistent; a groove is provided at one end of the base, and the two side walls of the groove of the base are symmetrically arranged relative to the center of the stepped hole at the bottom of the concave cavity, and the distance between the bottom of the groove of the base and the center of the stepped hole at the bottom of the concave cavity and the distance between the fork ear hole of the fork and the bottom surface of the fork match, ensuring that the fork is placed in the base, the bottom surface of the fork is parallel to one side of the assembled limit block, and has the correct position; after the pressure rod passes through the guide column, when it is pressed downward, the upper surface of the trapezoidal boss on the large cylinder of the pressure rod is in sliding contact with one side of the limit block, thereby ensuring that the pressed elastic bearing has the correct position relative to the fork.

2. The elastic bearing directional press-fitting tool according to claim 1, characterized in that: The outer circumferential surface of the handle is provided with knurling.

3. The elastic bearing directional press-fitting tool according to claim 1, characterized in that: After the pressure rod passes through the guide column, when it is pressed downward, the holes of the pressure rod, elastic bearing, guide sleeve and fork ear of the fork-shaped part are all concentric, ensuring that the pressure applied to the pressure rod is concentric with the axial direction of the elastic bearing, so that the two elastic bearings pressed into the fork ear holes of the fork-shaped part are concentric.

4. The elastic bearing directional press-fitting tool according to claim 3, characterized in that: The pressure rod, guide column and guide sleeve are made of metal.

5. The elastic bearing directional press-fitting tool according to claim 4, characterized in that: The metal is specifically 45# steel.

6. The elastic bearing directional press-fitting tool according to claim 5, characterized in that: The limit block is made of metal.

7. The elastic bearing directional press-fitting tool according to claim 6, characterized in that: The base is made of metal.

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