A pre-assembly fixture for rubber joint pressing

Abstract

This utility model relates to a pre-assembly fixture for rubber joints before press-fitting. The fixture includes a base, a pressure cap, a first bolt, and a positioning cylinder. When the base and pressure cap are aligned, two semi-circular grooves form a central hole. The central hole is used to place the rubber joint, and the base and pressure cap surround the outer circumference of the rubber joint. A positioning cylinder is fixedly connected to the center of the base's surface facing away from the pressure cap. At least one end face of the pressure cap is provided with an alignment mark, which indicates the gap position between the rubber body and the split parts. One end of the first bolt passes through the pressure cap and is threadedly connected to the base, fixing the pressure cap and base together. This fixture enables the pre-assembly of rubber joints, featuring a simple structure and convenient operation, solving the problem of the inability to smoothly press-fit existing split rubber joints.

Description

Technical Field

[0001] This utility model belongs to the field of high-speed train manufacturing and maintenance technology, specifically relating to a pre-assembly tooling for rubber joint pressing, used for pressing the traction rod component joints of the CRH1A type bogie of the high-speed train. Background Technology

[0002] Currently, the CRH1A high-speed train's traction rod assembly consists of a traction rod and rubber joints fitted into the node holes at both ends of the traction rod. The rubber joints at both ends of the traction rod assembly are a split structure, comprising a rubber main body with a pin and two separate parts symmetrically covering the outer periphery of the rubber main body.

[0003] When pressing the rubber joint, the rubber body with the pin and the two separate parts need to be pressed together into the joint holes at both ends of the traction rod. During pressing, because the rubber joint is a separate structure, there are requirements for the gap, position and angle between the rubber body and the two separate parts, and the rubber joint and the joint holes use an interference fit, which makes it impossible to press smoothly. Summary of the Invention

[0004] This utility model provides a pre-assembly fixture for rubber joints before pressing. This fixture can realize the pre-assembly of rubber joints and has the characteristics of simple structure and convenient operation. It solves the problem that existing split rubber joints cannot be pressed smoothly.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides a pre-assembly fixture for rubber joints before pressing, which includes a base, a pressure cap, a first bolt, and a positioning cylinder.

[0007] Both the base and the pressure cap are arc-shaped structures with semi-circular grooves; when the base and the pressure cap are connected, the two semi-circular grooves form a central hole; the central hole is used to place a rubber node, and the base and the pressure cap surround the outer periphery of the rubber node;

[0008] The positioning cylinder is fixedly connected to the center of the side surface of the base facing away from the cover;

[0009] At least one end face of the cap is provided with an alignment mark, which is used to indicate the gap position between the rubber body and the split body;

[0010] One end of the first bolt passes through the gland and is threaded to the base, thus fixing the gland and the base together.

[0011] Furthermore, each of the four corners of the gland is provided with a first through hole for the first bolt to pass through;

[0012] The base is provided with first threaded holes that correspond one-to-one with the first through holes;

[0013] The first through hole is perpendicular to the central hole;

[0014] One end of the first bolt passes through the first through hole and is threaded into the corresponding first threaded hole.

[0015] Furthermore, the base has a base body and two threaded connecting blocks;

[0016] Two threaded connecting blocks are fixedly installed on the end of the base body away from the pressure cover, and are symmetrically distributed on both sides of the positioning cylinder;

[0017] Each of the threaded connecting blocks is provided with two of the first threaded holes;

[0018] The base body is provided with a second through hole for connecting the corresponding first through hole and the first threaded hole.

[0019] Furthermore, the outer surface of the threaded connecting block is provided with a through countersunk hole;

[0020] The base body is provided with second threaded holes that correspond one-to-one with the countersunk holes;

[0021] One end of the second bolt passes through the countersunk hole and is threaded into the second threaded hole, thereby fixing the threaded connecting block to the base body.

[0022] Furthermore, the threaded connecting block has a cuboid shape.

[0023] The base body is provided with an opening groove that matches the shape of the threaded connecting block;

[0024] The threaded connecting block is embedded in the opening groove, and the outer surface of the threaded connecting block is coplanar with the outer surface of the base body.

[0025] Furthermore, along the axial direction of the central hole, the second threaded hole is located between the two first threaded holes; the second threaded hole is perpendicular to both the first threaded holes and the central hole.

[0026] Furthermore, the bolt is a hinged bolt.

[0027] Furthermore, the alignment mark is two oblique grooves extending radially along the central hole;

[0028] Along the radial direction of the central hole, the inclined groove is collinear with the gap between the split body and the rubber body.

[0029] Furthermore, the alignment mark is provided on both end faces of the pressure cap.

[0030] Furthermore, the diameter of the central hole is 104 mm.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The pre-assembly fixture for rubber nodes in this invention connects the base and the pressure cap together with a first bolt. Both the base and the pressure cap are arc-shaped structures. The rubber node is pressed into the center hole formed when the base and the pressure cap are connected, thus achieving the pre-assembly of the rubber node. The fixture is positioned and installed by a cylindrical positioning device. The rubber node pre-assembled in the center hole can be directly pressed into the traction rod by the pressing device. It has the characteristics of simple structure and convenient operation, and solves the problem that existing split rubber nodes cannot be pressed smoothly. Attached Figure Description

[0033] Figure 1a This is a front view of the pre-assembly tooling for the rubber node pressing of this utility model;

[0034] Figure 1b This is a top view of the pre-assembly tooling for the rubber joint pressing of this utility model;

[0035] Figure 1c This is a left view of the pre-assembly fixture for the rubber node pressing of this utility model;

[0036] Figure 2a This is a half-sectional view of the base body in this utility model;

[0037] Figure 2b This is a top view of the base body in this utility model;

[0038] Figure 2c This is a left view of the base body in this utility model;

[0039] Figure 3 These are the front view and right view of the threaded connecting block in this utility model.

[0040] Reference numerals: 3-base, 4-pressure cap, 5-first bolt, 6-positioning cylinder, 7-semi-circular groove, 8-center hole, 31-first threaded hole, 32-base body, 33-threaded connecting block, 34-second bolt, 41-alignment mark, 321-second through hole, 322-second threaded hole, 323-opening groove, 331-countersunk hole. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] This utility model embodiment provides a pre-assembly fixture for rubber joints before pressing, such as... Figure 1a , Figure 1b , Figure 1c As shown, the pre-assembly fixture for the rubber node before pressing includes a base 3, a pressure cap 4, a first bolt 5, and a positioning cylinder 6; wherein:

[0043] Both the base 3 and the pressure cap 4 are arch-shaped structures with semi-circular grooves 7. The semi-circular grooves 7 have the same radius, so that when the base 3 and the pressure cap 4 are mated, the two semi-circular grooves 7 exactly form a central hole 8. The diameter of the central hole 8 can be 104mm. The central hole 8 is used to place the rubber node, and the base 3 and the pressure cap 4 surround the outer circumference of the rubber node. During processing, the base 3 and the pressure cap 4 must be fixed with the first bolt 5 before the central hole 8 is machined to ensure the roundness of the hole.

[0044] like Figure 2a , Figure 2b , Figure 2c As shown, a positioning cylinder 6 is fixedly connected to the center of the surface of the base 3 on the side opposite to the pressure cover 4. The positioning cylinder 6 is a cylindrical structure and can be welded to the base 3; the axis of the positioning cylinder 6 is aligned with the center of the pre-assembled tooling and is used to cooperate with the positioning groove of the press-fit tooling to achieve precise positioning.

[0045] like Figure 1b As shown, at least one end face of the cap 4 is provided with an alignment mark 41, which is used to indicate the gap position between the rubber body and the split body. The alignment mark 41 can be two radially extending oblique grooves along the central hole 8, which can be laser-processed. Along the radial direction of the central hole 8, the oblique grooves are collinear with the gap between the split body and the rubber body. Both end faces of the cap 4 can be provided with alignment marks 41, so that alignment can be performed through the alignment mark 41 on either end face during assembly, which is convenient to use and improves work efficiency.

[0046] One end of the first bolt 5 passes through the pressure cap 4 and is threaded to the base 3, thus fixing the pressure cap 4 and the base 3 together. The first bolt 5 is a hinged bolt, and the specification of the first bolt 5 is M16×140. Hinged bolts have the characteristics of high strength and reusability.

[0047] To facilitate the fixed connection of the pressure cap 4 to the base 3, each of the four corners of the pressure cap 4 is provided with a first through hole for the first bolt 5 to pass through; the base 3 is provided with a first threaded hole 31 corresponding to the first through hole; the first through hole is perpendicular to the center hole 8; one end of the first bolt 5 passes through the first through hole and is threadedly connected to the corresponding first threaded hole 31.

[0048] like Figure 1b , Figure 2b as well as Figure 3 As shown, the base 3 has a base body 32 and two threaded connecting blocks 33; the two threaded connecting blocks 33 are fixedly installed on the end of the base body 32 away from the pressure cover 4, and are symmetrically distributed on both sides of the positioning cylinder 6; each threaded connecting block 33 is provided with two first threaded holes 31; the base body 32 is provided with a second through hole 321 for connecting the corresponding first through hole and the first threaded hole 31. The threaded connecting block 33 can be a cuboid structure and is fixedly installed on the base body 32; the front of the threaded connecting block 33 is machined with a first threaded hole 31 that matches the first bolt 5, the specification of the first threaded hole 31 is M16, used to cooperate with the first bolt 5 to fix the base 3 and the pressure cover 4; the side of the threaded connecting block 33 is machined with a countersunk hole 331, the countersunk hole 331 penetrates the threaded connecting block 33, used to fasten the threaded connecting block 33 to the base body 32; as Figure 1c As shown, the base body 32 is provided with a second threaded hole 322 corresponding to the countersunk hole 331. The specification of the second threaded hole 322 can be an M10 threaded hole, which is used to fix the threaded connecting block 33. One end of the second bolt 34 passes through the countersunk hole 331 and is threadedly connected to the second threaded hole 322, so as to fix the threaded connecting block 33 to the base body 32.

[0049] In order to position the threaded connecting block 33 on the base body 32 and improve the connection stability between the two, the base body 32 is provided with an opening groove 323 that matches the shape of the threaded connecting block 33. The opening groove 323 is a right-angle groove that matches the shape of the cuboid threaded connecting block 33. The threaded connecting block 33 is embedded in the opening groove 323, and the outer surface of the threaded connecting block 33 is coplanar with the outer surface of the base body 32. Positioning and limiting are achieved by the two sides of the threaded connecting block 33 fitting against the right-angle groove.

[0050] like Figure 1c and Figure 2c As shown, along the axial direction of the center hole 8, the second threaded hole 322 is located between the two first threaded holes 31; the second threaded hole 322 is perpendicular to both the first threaded holes 31 and the center hole 8.

[0051] The aforementioned pre-assembly fixture for pressing the rubber node connects the base 3 and the pressure cap 4 together using the first bolt 5. The base 3 and the pressure cap 4 can be separated by removing the first bolt 5. Both the base 3 and the pressure cap 4 are arc-shaped structures. The rubber node is pressed into the center hole 8 formed when the base 3 and the pressure cap 4 are connected, thereby realizing the pre-assembly of the rubber node. The positioning and installation are carried out by positioning the cylindrical part with the pressing equipment. The rubber node pre-assembled in the center hole 8 can be directly pressed into the traction rod by the pressing equipment. It has the characteristics of simple structure and convenient operation, and solves the problem that the existing split rubber nodes cannot be pressed smoothly.

[0052] The specific pre-assembly operation process using the aforementioned pre-assembly fixtures for pressing rubber nodes is as follows:

[0053] 1. Use a bench vise to clamp and secure base 3;

[0054] 2. Place the rubber node on base 3;

[0055] 3. Attach the pressure cap 4 to the rubber joint, and at the same time adjust the gap position angle between the rubber body and the split part of the rubber joint so that they are aligned with the alignment mark 41 on the pressure cap 4;

[0056] 4. Install and tighten the first bolt 5. During the tightening process, constantly check that the gap and angle between the rubber body and the split part meet the requirements.

[0057] 5. Place the pre-assembled rubber joints onto the joint holes of the traction rod body and press them in, as shown.

[0058] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this utility model without departing from the spirit and scope of this utility model. Therefore, if these modifications and variations of this utility model fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A rubber node pre-assembly tooling for pre-assembly prior to press fitting, characterized by, Includes base, pressure cap, first bolt, and positioning cylinder; Both the base and the pressure cap are arc-shaped structures with semi-circular grooves; when the base and the pressure cap are connected, the two semi-circular grooves form a central hole; the central hole is used to place a rubber node, and the base and the pressure cap surround the outer periphery of the rubber node; The positioning cylinder is fixedly connected to the center of the side surface of the base facing away from the cover; At least one end face of the cap is provided with an alignment mark, which is used to indicate the gap position between the rubber body and the split body; One end of the first bolt passes through the gland and is threaded to the base, thus fixing the gland and the base together.

2. The rubber node pre-assembly fixture of claim 1, wherein, Each of the four corners of the gland is provided with a first through hole for the first bolt to pass through; The base is provided with first threaded holes that correspond one-to-one with the first through holes; The first through hole is perpendicular to the central hole; One end of the first bolt passes through the first through hole and is threaded into the corresponding first threaded hole.

3. The rubber node pre-assembly fixture of claim 2, wherein, The base has a base body and two threaded connecting blocks; Two threaded connecting blocks are fixedly installed on the end of the base body away from the pressure cover, and are symmetrically distributed on both sides of the positioning cylinder; Each of the threaded connecting blocks is provided with two of the first threaded holes; The base body is provided with a second through hole for connecting the corresponding first through hole and the first threaded hole.

4. The rubber node pre-assembly fixture of claim 3, wherein, The outer side of the threaded connecting block is provided with a through countersunk hole; The base body is provided with second threaded holes that correspond one-to-one with the countersunk holes; One end of the second bolt passes through the countersunk hole and is threaded into the second threaded hole, thereby fixing the threaded connecting block to the base body.

5. The rubber node pre-assembly fixture of claim 4, wherein, The threaded connecting block has a rectangular parallelepiped structure; The base body is provided with an opening groove that matches the shape of the threaded connecting block; The threaded connecting block is embedded in the opening groove, and the outer surface of the threaded connecting block is coplanar with the outer surface of the base body.

6. The rubber node pre-assembly fixture of claim 5, wherein, Along the axial direction of the central hole, the second threaded hole is located between the two first threaded holes; the second threaded hole is perpendicular to both the first threaded holes and the central hole.

7. The rubber node pre-press fitting assembly of claim 1, wherein, The first bolt is a reamed bolt.

8. The rubber node pre-assembly fixture of claim 1, wherein, The alignment mark is two oblique grooves extending radially along the central hole; Along the radial direction of the central hole, the inclined groove is collinear with the gap between the split body and the rubber body.

9. The rubber node pre-assembly fixture of claim 1, wherein, The alignment mark is provided on both end faces of the pressure cap.

10. The rubber node pre-assembly fixture of any of claims 1-9, wherein, The diameter of the central hole is 104 mm.

Images