Hydraulic control structure for clutch booster

Abstract

The present invention discloses an oil pressure control structure for a clutch booster, comprising an oil pressure controller chamber (101), a valve seat (102) provided in the oil pressure control chamber (101), a valve assembly provided in the valve seat (102), and the valve assembly comprising a valve housing (103) and a valve (104), the valve (104) being provided in the valve housing (102), the valve housing (103) and the valve (104) being closely matched, the valve housing (103) comprising a housing wall (103a) and a housing bottom (103b), an air hole (103c) being provided on the housing bottom (103b), the valve (104) comprising a valve wall (104a) and a valve bottom (104b), the valve wall (104a) being closely matched with the housing wall (103a). The oil pressure control structure for a clutch booster designed using this scheme has the advantages of compact structure, strong sealing performance, and stable operation.

Description

Technical Field

[0001] The present invention relates to a clutch booster, in particular to an oil pressure control structure for a clutch booster. Background Art

[0002] The control piston assembly of the existing oil pressure control structure of the clutch booster for automobiles mainly consists of a control piston 2 and a sealing ring 1 installed thereon. The current structure is that the front end of the control piston uses a Y-shaped sealing ring to seal the air, and the rear end uses a double-opening Y-shaped sealing ring (such as Figure 1 The double-opening Y-ring seals with the right opening sealing oil, and the left lip sealing air. During operation, the pressurized opening squeezes the non-pressurized opening toward the gap between the piston and the cylinder bore, causing excessive wear or damage to the opening and shortening the product's life.

[0003] Therefore, those skilled in the art are committed to developing an oil pressure control structure for a clutch booster that can increase the service life of the clutch booster. Summary of the Invention

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide an oil pressure control structure for a clutch booster, which can avoid the risk of the opening edge of the sealing ring being squeezed into the gap between the piston and the cylinder hole, thereby increasing the service life of the sealing ring, and can also avoid air leakage of the intake valve, thereby improving the sealing performance of the clutch booster, with a compact structure and stable operation.

[0005] To achieve the above-mentioned purpose, the present invention provides an oil pressure control structure for a clutch booster, comprising an oil pressure controller cavity, a valve seat being provided in the oil pressure control cavity, a valve assembly being provided in the valve seat, the valve assembly comprising a valve housing and a valve, the valve being provided in the valve housing, the valve housing and the valve being closely matched, the valve housing comprising a housing wall and a housing bottom, an air hole being provided on the housing bottom; the valve (104) comprising a valve body and a valve bottom, the valve body being closely matched with the housing wall.

[0006] Furthermore, the air hole is arranged at the geometric center of the shell bottom.

[0007] Furthermore, an air intake connector is provided at the outer end of the oil pressure control chamber, one end of which extends into the oil pressure control chamber and abuts against the valve seat. The air intake connector provided in the oil pressure control chamber is provided with a valve return spring, one end of which abuts against the air intake connector and the other end abuts against the bottom surface of the valve.

[0008] Furthermore, a control piston is provided in the oil pressure control chamber, and the control piston includes a piston rod and a piston provided at one end of the piston rod; two sealing ring grooves are provided on the piston, and a Y-shaped sealing ring is provided in each of the two sealing ring grooves, and the opening directions of the two Y-shaped sealing rings are arranged facing each other.

[0009] Furthermore, the opening of the Y-shaped sealing ring close to the piston rod faces one side of the piston rod, and the opening of the Y-shaped sealing ring faces the top surface of the piston.

[0010] Furthermore, a sealing ring groove is also provided on the piston rod, and a Y-shaped sealing ring is also provided in the sealing ring groove on the piston rod. The opening direction of the Y-shaped sealing ring on the piston rod is consistent with that of the Y-shaped sealing ring.

[0011] Furthermore, the free end of the piston rod extends into the valve seat, the diameter of the free end of the piston rod is smaller than the middle diameter of the piston rod, and a piston return spring is sleeved on the end of the piston rod. The piston return spring is also in the valve seat, and the end is clamped on the boss.

[0012] Furthermore, a boss is provided on the rear end surface of the shell bottom, and the inner diameter circle of the valve return spring can be sleeved on the outer circle contour of the boss.

[0013] Furthermore, the outer diameter of the boss is equal to the inner diameter of the valve return spring.

[0014] The beneficial effects of the present invention are as follows: (1) Two sealing ring grooves are provided on the piston, and the sealing ring is changed into two independent Y-shaped sealing rings, which respectively seal the hydraulic and pneumatic pressures from two different directions. This can effectively avoid the risk of the sealing opening being squeezed into the gap between the piston and the cylinder hole, thereby increasing the service life of the sealing ring and further increasing the overall service life of the product. (2) The exhaust air hole during the assembly of the valve assembly is left on the valve housing. In such a structure, even if a fitting gap occurs between the valve and the valve housing, the compressed air at the air inlet will only flow back to the air inlet through the air hole in the center of the valve housing, and will not flow into the valve seat, thereby ensuring the sealing performance of the product. (3) The oil pressure control structure for the clutch booster using this solution is compact in structure, reduces the spatial volume of the oil pressure control structure part of the clutch booster, and has a reasonable overall design structure, which makes the operation stable and the service life long. (4) A boss is provided on the rear end face of the shell bottom so that the force of the valve return spring acting on the valve assembly is evenly distributed along the center. The valve can be opened and closed smoothly without any jamming, thereby preventing air leakage from the valve assembly and improving the overall service life and quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the oil pressure control structure for the clutch booster of the present invention;

[0016] Figure 2 It is a structural schematic diagram of the control piston in the oil pressure control structure for the clutch booster of the present invention;

[0017] Figure 3 This is a schematic diagram of the position of the oil pressure control structure for the clutch booster of the present invention in the overall structure;

[0018] Figure 4 yes Figure 3 Enlarged view of point B in the middle;

[0019] Figure 5 This is a schematic structural diagram of a first embodiment of a valve assembly according to the present invention;

[0020] Figure 6 It is a schematic diagram of the valve assembly in the overall structure of the present invention;

[0021] Figure 7 It is a structural schematic diagram of the air intake screen partition in the present invention;

[0022] Figure 8 It is a structural diagram of the second embodiment of the valve assembly in the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, in the description of the present invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific manner. Therefore, they should not be construed as limiting the present invention. The terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] Example 1

[0025] like Figures 1 to 7As shown, the present invention provides a hydraulic control structure for a clutch booster. A valve seat 102 is disposed within the intake port of a hydraulic control chamber 101. An O-ring 108 is provided in the middle of the outer wall of the valve seat 102 to seal against the inner wall of the hydraulic control chamber 101. The valve seat 102 has a boss 102a, and a valve assembly 109 is secured to the boss 102a of the valve seat 102. The valve assembly 109 includes a valve housing 103 and a valve 104. The valve 104 is disposed within the valve housing 103, that is, the valve housing 103 covers the valve 104. The valve housing 103 and the valve 104 fit tightly together. The valve housing 103 includes a housing wall 103a and a housing bottom 103b. The valve 104 includes a valve body 104a and a valve bottom 104b. The valve body 104a fits tightly against the housing wall 103a. A vent hole 103c is provided on the shell bottom 103b. Preferably, the vent hole 103c is provided at the geometric center of the shell bottom 103b.

[0026] The inner end of the oil pressure control chamber 101 is connected to the master cylinder 100. The outer end of the oil pressure control chamber 101 is provided with an air intake connector 105. One end of the air intake connector 105 extends into the oil pressure control chamber 101 and abuts against the valve seat 102. A valve return spring 106 is provided on the air intake connector 105 in the oil pressure control chamber 101. One end of the valve return spring 106 abuts against the air intake connector 105, and the other end abuts against the bottom surface of the valve 104. An air intake screen partition 107 is provided at the entrance of the air intake connector 105. The mesh surface of the air intake screen partition 107 is a circular arc surface, and the circular arc surface is concave in the oil pressure control chamber 101.

[0027] A control piston is provided in the oil pressure control chamber 101, which includes a piston rod 2 and a piston 3 fixed at one end of the piston rod 2. The piston rod 2 and the piston 3 are coaxially arranged, and two parallel sealing ring grooves 3a and 3b are provided on the piston 3. The planes where the sealing ring grooves 3a and 3b are located are perpendicular to the axis of the piston 3. A Y-type sealing ring 4a is provided in the sealing ring groove 3a; a Y-type sealing ring 4b is provided in the sealing ring groove 3b. The opening directions of the Y-type sealing ring 4a and the Y-type sealing ring 4b are arranged facing each other, and the opening of the Y-type sealing ring 4b close to the piston rod 2 is toward the side of the piston rod, and the opening of the Y-type sealing ring 4a is toward the top surface of the piston 3.

[0028] A sealing ring groove 3c is also defined in the middle of the piston rod 2. This groove is perpendicular to the axis of the piston rod 2 and contains a Y-shaped sealing ring 4c. The opening of the Y-shaped sealing ring 4c faces the free end of the piston rod 2, aligning with the opening of the Y-shaped sealing ring 4b. A friction-reducing ring 2a is located on the piston rod 2 on one side of the Y-shaped sealing ring 4c. This ring is positioned within a groove machined into the piston rod 2.

[0029] The free end of the piston rod 2 extends into the valve seat 102. The end diameter of the piston rod 2 is smaller than the middle diameter of the piston rod 2. The end of the piston rod 2 is sleeved with a piston return spring 5. The piston return spring 5 is also in the valve seat 102, and the end is clamped on the boss 102a.

[0030] Example 2

[0031] like Figure 8 Unlike Example 1, a boss 103d is provided on the rear end surface of the housing bottom 103b. The boss 103d is concentric with the housing bottom 103b, and the inner diameter of the valve return spring fits over the outer contour of the boss. The outer diameter of the boss 103d is equal to the inner diameter of the valve return spring. The vent hole 103c passes through the boss 103d.

[0032] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art through logical analysis, reasoning, or limited experimentation based on the concepts of the present invention and the prior art should be within the scope of protection defined by the claims.

Claims

1. A clutch booster oil pressure control structure, comprising an oil pressure control chamber (101), a valve seat (102) disposed in the oil pressure control chamber (101), a valve assembly (109) disposed in the valve seat (102), and characterized in that: The valve assembly (109) includes a valve housing (103) and a valve (104), wherein the valve (104) is arranged in the valve housing (103), and the valve housing (103) and the valve (104) are tightly matched, wherein the valve housing (103) includes a housing wall (103a) and a housing bottom (103b), and an air hole (103c) is provided on the housing bottom (103b); the valve (104) includes a valve body (104a) and a valve bottom (104b), and the valve body (104a) is tightly matched with the housing wall (103a); A control piston is provided in the oil pressure control chamber (101), and the control piston includes a piston rod (2) and a piston (3) provided at one end of the piston rod (2); two sealing ring grooves (3a; 3b) are provided on the piston (3), and a Y-shaped sealing ring (4a; 4b) is provided in each of the two sealing ring grooves (3a; 3b), and the opening directions of the two Y-shaped sealing rings (4a; 4b) are arranged facing each other; The opening of the Y-shaped sealing ring (4b) close to the piston rod (2) faces one side of the piston rod, and the opening of the Y-shaped sealing ring (4a) faces the top end surface of the piston (3); The piston rod (2) is also provided with a sealing ring groove (3c), and a Y-shaped sealing ring (4c) is also provided in the sealing ring groove (3c) on the piston rod (2). The opening direction of the Y-shaped sealing ring (4c) on the piston rod (2) is consistent with that of the Y-shaped sealing ring (4b); The free end of the piston rod (2) extends into the valve seat (102), the diameter of the free end of the piston rod (2) is smaller than the diameter of the middle part of the piston rod (2), and a piston return spring (5) is sleeved on the end of the piston rod (2), the piston return spring (5) is also in the valve seat (102), and the end is clamped on the boss (102a); An air intake connector (105) is provided at the outer end of the oil pressure control chamber (101), one end of the air intake connector (105) extends into the oil pressure control chamber (101) and abuts against the valve seat (102), and a valve return spring (106) is provided on the air intake connector (105) provided in the oil pressure control chamber (101), one end of the valve return spring (106) abuts against the air intake connector (105), and the other end abuts against the bottom surface of the valve (104); A boss (103d) is provided on the rear end surface of the shell bottom (103b), and the inner diameter circle of the valve return spring (106) can be sleeved on the outer circle contour of the boss.

2. The clutch booster oil pressure control structure according to claim 1, wherein: The air hole (103c) is arranged at the geometric center of the shell bottom (103b).

3. The hydraulic control structure for a clutch booster according to claim 1, wherein: The outer diameter of the boss (103d) is equal to the inner diameter of the valve return spring (106).

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