Integrated piston main shaft

Abstract

The utility model relates to the technical field of clutch master cylinders, in particular to an integrated piston main shaft which comprises an integrally preformed piston part, a first half shaft and a second half shaft, and the first half shaft and the second half shaft are arranged on the two sides of the piston part respectively. A step through hole bottom hole is preformed in the first half shaft, penetrates through the middle of the piston part and extends to the end, close to the piston part, of the second half shaft. An axial bottom hole is preformed in one end, far away from the piston part, of the second half shaft; a first weight-reducing vent groove and a second weight-reducing vent groove are preformed on the second half shaft, and the first weight-reducing vent groove is communicated with the step through hole bottom hole; and a radial vent hole communicated with the step through hole bottom hole is preformed in the first half shaft. The rough shapes of the piston part and the half shaft can be preformed in a die-casting mode, the weight-reducing vent groove and the related vent holes can be preformed, the material loss can be greatly reduced, the machining amount is reduced, and therefore the machining cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of clutch master cylinder technology, and in particular to an integrated piston spindle. Background Technology

[0002] The piston spindle of the existing clutch master cylinder is generally manufactured in two ways. One way is to machine a cylindrical material with a diameter slightly larger than the outer diameter of the piston, machining the piston part and the two half shafts at both ends, and then drilling the two half shafts. This method involves a large amount of machining, a long processing time, and a lot of material consumption. The second method is to forge a bar into a blank with a cross-section of "+", and then machine and drill the blank. This method consumes less material than the first method, but it is still a large amount of machining and a complex process overall. Utility Model Content

[0003] The purpose of this invention is to provide an integrated piston spindle that can be pre-formed into the corresponding blank shape through die casting, which can significantly reduce material consumption, processing volume and processing cost, and at the same time reduce the weight of the finished product.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] An integral piston spindle includes an integrally pre-formed piston section and a first half-shaft and a second half-shaft respectively disposed on both sides of the piston section.

[0006] The first half-shaft has a pre-formed stepped through-hole bottom hole, which penetrates the middle of the piston part and extends to the end of the second half-shaft near the piston part.

[0007] The second half-shaft has an axial bottom hole pre-formed at one end away from the piston part; the second half-shaft has a first weight-reducing vent groove and a second weight-reducing vent groove pre-formed on it, and the first weight-reducing vent groove is connected to the bottom hole of the stepped through hole.

[0008] The first half-shaft has a pre-formed radial vent hole that communicates with the bottom hole of the stepped through hole.

[0009] The integrated piston spindle of this invention is formed by die casting. The die casting method replaces the original extrusion molding or direct processing on a large-diameter column, which can effectively reduce the processing difficulty and amount of processing, reduce material costs, and also reduce the overall weight of the finished integrated piston spindle.

[0010] By preforming the approximate shape of the piston part, the first half-shaft, and the second half-shaft, the amount of machining work in the later stage can be reduced, as can the amount of material used during die casting.

[0011] By pre-forming the first weight-reducing venting groove, the second weight-reducing venting groove, and radial venting holes, the subsequent milling and drilling work can be reduced, and the weight of the finished piston spindle can also be significantly reduced.

[0012] The present invention is further configured such that: a limiting protrusion is pre-formed on the outer edge of the end face where the piston part is connected to the first half shaft.

[0013] The pre-formed limiting protrusions prevent the finished piston spindle from contacting the bottom surface of the master cylinder of the responsive clutch.

[0014] The present invention is further configured such that: a guide belt mounting groove and a sealing ring mounting groove are formed in the middle of the second half shaft; the guide belt mounting groove and the sealing ring mounting groove are located in the first weight reduction ventilation groove and the second weight reduction ventilation groove;

[0015] The end of the second half-shaft away from the piston is formed with a first integrated bottom groove.

[0016] During the later processing, only rough turning and finish turning on the corresponding bottom groove are needed to complete the work of the guide belt installation groove and the sealing ring installation groove, which can effectively reduce the amount of cutting and improve the processing efficiency.

[0017] The present invention is further configured such that a spring limiting groove is formed on the end face of the piston part connected to the second half shaft.

[0018] The spring limit groove facilitates the limiting of the spring in the clutch master cylinder later, preventing the clutch from moving left or right.

[0019] The present invention is further configured such that: a second integrated bottom groove is pre-formed on the outer wall of the piston part, and the guide belt and sealing ring can be installed in the second integrated bottom groove after precision machining.

[0020] The present invention is further configured such that the first weight-reducing ventilation groove and the second weight-reducing ventilation groove are waist-shaped holes;

[0021] The first and second weight-reducing ventilation grooves are designed with a larger outer end and a smaller middle end. The waist-shaped hole facilitates die casting while minimizing material usage and reducing the weight of the finished product.

[0022] The present invention is further configured such that: the second half-shaft is formed with an axial ventilation hole that connects the axial bottom hole and the second weight-reducing ventilation groove.

[0023] The outstanding effect of this utility model is:

[0024] Compared with existing technologies, die casting can pre-form the approximate shape of the piston and half shaft, as well as the weight-reducing ventilation groove and related ventilation holes, which can significantly reduce material consumption, reduce machining workload, thereby reducing processing costs and product weight. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0026] Figure 2 This is a half-sectional view of an embodiment of the present utility model;

[0027] Figure 3 for Figure 2 Sectional view of AA.

[0028] Reference numerals: 10, piston part; 101, limiting protrusion; 102, spring limiting groove;

[0029] 20. First half-shaft; 201. Stepped through hole bottom hole; 202. Radial vent hole;

[0030] 30. Second half-shaft; 301. Axial bottom hole; 302. First weight-reducing vent groove; 303. Second weight-reducing vent groove; 304. Guide belt mounting bottom groove; 305. Sealing ring mounting bottom groove; 306. First integrated bottom groove; 307. Axial vent hole. Detailed Implementation

[0031] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0032] The following is for reference Figures 1 to 3 The embodiments of this utility model are described below:

[0033] An integrated piston spindle, such as Figure 1 As shown, it includes an integrally pre-formed piston part 10, a first half-shaft 20 and a second half-shaft 30 respectively disposed on both sides of the piston part 10.

[0034] like Figure 2 As shown, a stepped through hole bottom hole 201 is pre-formed on the first half-shaft 20. The stepped through hole bottom hole 201 penetrates the middle of the piston part 10 and extends to one end of the second half-shaft 30 near the piston part 10.

[0035] The second half-shaft 30 has an axial bottom hole 301 pre-formed at one end away from the piston part 10; the second half-shaft 30 has a first weight reduction venting groove 302 and a second weight reduction venting groove 303 pre-formed on it, and the first weight reduction venting groove 302 is connected to the bottom hole 201 of the stepped through hole.

[0036] The first half-shaft 20 has a pre-formed radial vent hole 202 that communicates with the bottom hole 201 of the stepped through hole.

[0037] The integrated piston spindle of this embodiment is formed by die casting. The die casting method replaces the original extrusion molding or direct machining on a large-diameter column, which can effectively reduce the processing difficulty and amount of processing, reduce material costs, and also reduce the overall weight of the integrated piston spindle.

[0038] By preforming the approximate shape of the piston part 10, the first half-shaft 20 and the second half-shaft 30, the amount of machining work in the later stage can be reduced, and the amount of material used during die casting can also be reduced.

[0039] By pre-forming the first weight-reducing venting groove, the second weight-reducing venting groove, and radial venting holes, the subsequent milling and drilling work can be reduced, and the weight of the finished piston spindle can also be significantly reduced.

[0040] like Figure 1 As shown, in this embodiment, a limiting protrusion 101 is pre-formed on the outer edge of the end face where the piston portion 10 connects to the first half-shaft 20.

[0041] The pre-formed limiting protrusions prevent the finished piston spindle from contacting the bottom surface of the master cylinder of the responsive clutch.

[0042] like Figure 3 As shown, the second half-shaft 30 of this embodiment has a guide belt mounting groove 304 and a sealing ring mounting groove 305 formed in the middle; the guide belt mounting groove 304 and the sealing ring mounting groove 305 are located in the first weight reduction ventilation groove 302 and the second weight reduction ventilation groove 303.

[0043] The end of the second half-shaft 30 away from the piston portion 10 is formed with a first integrated bottom groove 306.

[0044] During the later processing, only rough turning and finish turning on the corresponding bottom groove are needed to complete the work of the guide belt installation groove and the sealing ring installation groove, which can effectively reduce the amount of cutting and improve the processing efficiency.

[0045] like Figure 3 As shown, a spring limiting groove 102 is formed on the end face of the piston part 10 connected to the second half shaft 30 in this embodiment.

[0046] The spring limit groove facilitates the limiting of the spring in the clutch master cylinder later, preventing the clutch from moving left or right.

[0047] like Figure 3 As shown, the piston part 10 of this embodiment has a second integrated bottom groove 103 pre-formed on its outer wall. After the second integrated bottom groove is precision machined, a guide belt and a sealing ring can be installed.

[0048] The first weight-reducing ventilation groove 302 and the second weight-reducing ventilation groove 303 are waist-shaped holes;

[0049] The first weight-reducing ventilator 302 and the second weight-reducing ventilator 303 are designed with a larger outer end and a smaller middle end. The waist-shaped hole facilitates die casting while minimizing material usage and reducing the weight of the finished product.

[0050] like Figure 3 As shown, the second half-shaft 30 of this embodiment has an axial ventilation hole 307 that connects the axial bottom hole 301 and the second weight-reducing ventilation groove 303.

[0051] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. An integrated piston spindle, characterized by: The piston part (10) is integrally preformed, the first half shaft (20) and the second half shaft (30) are arranged on both sides of the piston part (10) respectively; The first half shaft (20) is preformed with a stepped through hole bottom hole (201), the stepped through hole bottom hole (201) penetrates the middle part of the piston part (10) and extends to one end of the second half shaft (30) close to the piston part (10); The second half shaft (30) is preformed with an axial bottom hole (301) at one end away from the piston part (10); the first weight-reducing ventilation groove (302) and the second weight-reducing ventilation groove (303) are preformed on the second half shaft (30), the first weight-reducing ventilation groove (302) is arranged in communication with the stepped through hole bottom hole (201); The first half shaft (20) is preformed with a radial ventilation hole (202) in communication with the stepped through hole bottom hole (201).

2. An integrated piston spindle as claimed in claim 1, characterized in that: The end surface outer edge of the piston part (10) connected with the first half shaft (20) is preformed with a limiting protrusion (101).

3. An integrated piston spindle as claimed in claim 1, characterized in that: The middle part of the second half shaft (30) is formed with a guide belt mounting bottom groove (304) and a sealing ring mounting bottom groove (305); the guide belt mounting bottom groove (304) and the sealing ring mounting bottom groove (305) are located in the first weight-reducing ventilation groove (302) and the second weight-reducing ventilation groove (303); The end part of the second half shaft (30) away from the piston part (10) is formed with a first integrated bottom groove (306).

4. An integrated piston spindle as claimed in claim 1, characterized in that: The end surface of the piston part (10) connected with the second half shaft (30) is formed with a spring limiting groove (102).

5. An integrated piston spindle as claimed in claim 1, characterized in that: The outer wall of the piston part (10) is preformed with a second integrated bottom groove (103).

6. An integrated piston spindle as claimed in claim 1, characterized in that: The first weight-reducing ventilation groove (302) and the second weight-reducing ventilation groove (303) are in the shape of a waist hole; The first weight-reducing ventilation groove (302) and the second weight-reducing ventilation groove (303) are arranged with the outer end being larger and the middle part being smaller.

7. An integrated piston spindle as claimed in claim 1, characterized in that: The second half shaft (30) is formed with an axial ventilation hole (307) in communication with the axial bottom hole (301) and the second weight-reducing ventilation groove (303).

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