Flexible center for centering tail part of main cylinder body

Abstract

The utility model relates to a flexible center for centering the tail part of a main cylinder body, and belongs to a machining tool of an automotive brake main cylinder body. The hollow column of the tip body is in threaded connection with the stud, the outer sleeve is sleeved outside the hollow column of the tip body, the large spring is sleeved outside the hollow column, the small spring is located in the hollow column, the tip is located in the hollow column at the front end of the small spring, and the rear end of the jacking column is located in a hole at the front end of the outer sleeve. The cover penetrates through the center, the large spring and the jacking column through the center hole and the jacking column hole, then is arranged outside the front end of the outer sleeve in a sleeving mode and is fixedly connected with the outer portion of the hollow column of the center body in a jacking mode through an inner hexagonal bolt. The fixture has the advantages that the structure is novel, the problems that the axis of the main cylinder body and the axis of the tip do not coincide, the tip cannot tightly jack a workpiece, the workpiece is loosened during machining, and the size of a machined part is unqualified are solved, and therefore the machining quality and the product percent of pass of the main cylinder body are guaranteed.

Description

Technical Field

[0001] This utility model relates to machining fixtures for the main cylinder of an automotive brake, and particularly to a centering flexible tip at the tail of the main cylinder. Background Technology

[0002] When machining the master cylinder of an automotive brake system, one end of the master cylinder must first be clamped, and then the other end is clamped by a center before machining. The correct clamping method is to ensure that the axis of the master cylinder and the axis of the center coincide after the master cylinder is mounted and clamped in the fixture. Figure 5 As shown.

[0003] However, because the tail end of the main cylinder block is a cast blank surface with very poor flatness, the main cylinder block axis often becomes misaligned during tightening, meaning the main cylinder block axis and the center axis do not coincide. This causes the machined parts to have dimensional defects, resulting in scrap. Figure 6 As shown. Furthermore, in many cases, even when using a center to clamp the workpiece, the workpiece may not be clamped tightly enough, leading to loosening during processing and resulting in scrap. Summary of the Invention

[0004] This invention provides a flexible centering tip for the tail of the main cylinder to solve the problem that the main cylinder axis and the tip axis do not coincide, the tip cannot hold the workpiece tightly, and the workpiece will loosen during processing, resulting in the machined parts having unqualified dimensions.

[0005] The technical solution adopted by this utility model includes a pointed body, a pointed tip, an outer sleeve, a cover, a tightening post, a small spring, a large spring, a double-ended bolt, and a hexagonal bolt. The hollow post of the pointed body is threadedly connected to the double-ended bolt. The outer sleeve is fitted over the hollow post of the pointed body. The large spring is fitted over the hollow post. The small spring is located in the hollow post. The pointed tip is located in the hollow post at the front end of the small spring. The rear end of the tightening post is located in the hole at the front end of the outer sleeve. The cover passes through the pointed tip, the large spring, and the tightening post through the central hole and the hole of the tightening post, respectively, and is fitted over the front end of the outer sleeve. It is then tightened and fixed to the outside of the hollow post of the pointed body with the hexagonal bolt.

[0006] The rear end of the outer casing contacts the tip of the device with a spherical surface.

[0007] The number of clamping columns is 6.

[0008] The rear end of the clamping column is spherical and located inside the spherical hole at the front end of the outer sleeve, making flexible contact through the spherical surface.

[0009] The front end of the large spring extends beyond the tip.

[0010] The advantages of this invention are its novel structure. During the centering process, the large spring first contacts the tail of the main cylinder, lifting or pressing the main cylinder to essentially straighten it. During the clamping process, when the clamping pin contacts the tail of the main cylinder, since the clamping pin and the outer sleeve, and the center body and the outer sleeve are all connected by a spherical flexible connection, and the bottom surface of the outer sleeve is spherical, it is always in contact with the spherical surface of the center body and can rotate within a certain range. Therefore, the clamping pin can contact the tail of the cylinder at different angles and achieve clamping. This solves the problem that the main cylinder axis and the center axis do not coincide, the center cannot clamp the workpiece tightly, and the workpiece will loosen during processing, resulting in unqualified dimensions of the processed parts. This ensures the processing quality of the main cylinder and the product qualification rate. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 yes Figure 1 AA section view;

[0013] Figure 3 yes Figure 1 The left view;

[0014] Figure 4 This is a schematic diagram of the machining process for the main cylinder body of this utility model;

[0015] Figure 5 This is a schematic diagram of the correct clamping method where the main cylinder axis and the center axis coincide.

[0016] Figure 6 This is a schematic diagram of an incorrect clamping method where the axis of the main cylinder block and the axis of the tip do not coincide. Detailed Implementation

[0017] like Figure 1 , 2 As shown, the device includes a tip 1, a tip 2, an outer sleeve 3, a cover 4, a clamping post 5, a small spring 6, a large spring 7, a double-ended bolt 8, and a hex bolt 9. The hollow post 101 of the tip 1 is threadedly connected to the double-ended bolt 8. The outer sleeve 3 is fitted onto the outside of the hollow post 101 of the tip 1. The large spring 7 is fitted onto the outside of the hollow post 101. The small spring 6 is located inside the hollow post 101. The tip 2 is located inside the hollow post 101 at the front end of the small spring 6. The rear end of the clamping post 5 is located in the hole at the front end of the outer sleeve 3. The cover 4 passes through the center hole and the clamping post hole, respectively, through the tip 2, the large spring 7, and the clamping post 5, and is fitted onto the outside of the front end of the outer sleeve 3. It is then clamped and fixed to the outside of the hollow post 101 of the tip 1 with the hex bolt 9.

[0018] The rear end of the outer jacket 3 contacts the tip 1 with a spherical surface.

[0019] like Figure 3As shown, there are 6 clamping columns 5.

[0020] The rear end of the clamping column 5 is spherical and is located inside the spherical hole at the front end of the outer sleeve 3, making flexible contact through the spherical surface.

[0021] The front end of the large spring 7 extends beyond the tip 2.

[0022] Working principle

[0023] The double-ended bolt 8 connects to the hydraulic cylinder rod, connecting the front end of the main cylinder body 10 to the machining fixture. Centering, clamping, and releasing are achieved by moving the hydraulic cylinder rod back and forth; wherein:

[0024] Centering process: Before centering point 2 is tightened, the large spring 7 first contacts the tail of the main cylinder, lifting or pressing down the main cylinder to basically straighten it. Then, centering point 2 enters the center hole at the tail of the main cylinder to complete the centering of the part.

[0025] Centering process: After centering is completed, the hydraulic cylinder rod continues to move forward. When the clamping column 5 contacts the tail of the main cylinder, since the clamping column 5 and the outer sleeve 3, and the center body 1 and the outer sleeve 3 are all connected by a spherical flexible connection, and the bottom surface of the outer sleeve 3 is spherical, it is always in contact with the spherical surface of the center body 1, and can rotate within a certain range, the clamping column 5 can contact the tail of the cylinder at different angles and achieve clamping. Figure 4 As shown; after processing is completed, the hydraulic cylinder rod can be moved backward to release it.

Claims

1. A flexible centering tip for the tail of a main cylinder block, characterized in that: It includes a center body, a center, an outer sleeve, a cover, a clamping post, a small spring, a large spring, a double-ended bolt, and a hex bolt. The hollow post of the center body is threadedly connected to the double-ended bolt. The outer sleeve is fitted over the hollow post of the center body. The large spring is fitted over the hollow post. The small spring is located inside the hollow post. The center is located in the hollow post at the front end of the small spring. The rear end of the clamping post is located in the hole at the front end of the outer sleeve. The cover passes through the center, the large spring, and the clamping post through the center hole and the hole of the clamping post, respectively, and is fitted over the front end of the outer sleeve. It is then clamped and fixed to the outside of the hollow post of the center body with a hex bolt.

2. The flexible centering tip for the tail section of the main cylinder block according to claim 1, characterized in that: The rear end of the outer casing contacts the tip of the device with a spherical surface.

3. The flexible centering tip at the tail of the main cylinder block according to claim 1, characterized in that: The number of clamping columns is 6.

4. A flexible centering tip for the tail section of a main cylinder as described in claim 1 or 3, characterized in that: The rear end of the clamping column is spherical and located inside the spherical hole at the front end of the outer sleeve, making flexible contact through the spherical surface.

5. A flexible centering tip for the tail section of a main cylinder according to claim 1, characterized in that: The front end of the large spring extends beyond the tip.

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