Improved clutch booster

Abstract

The utility model relates to the field of boosters, in particular to an improved clutch booster which comprises a valve body, an air cylinder cover and an air inlet cover, the air cylinder cover is fixedly connected to the valve body, the air inlet cover is fixedly connected to the air cylinder cover, an air inlet channel and an oil inlet channel are arranged in the improved clutch booster, and oil pressure of a clutch master cylinder is combined. According to the clutch boosting device, a rubber diaphragm structure with a complex structure is abandoned, the air cylinder piston is designed through integrated insert die-casting forming, meanwhile, the ejector rod piston and the ejector rod are designed to be of a split structure, errors caused by form and location tolerance can be reduced, and the clutch boosting effect is achieved. The process cost is greatly reduced, and the reliability and the service life of the product are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power booster, especially to an improved clutch power booster. BACKGROUND

[0002] The prior art product is rubber diaphragm structure, the structure is more complex, and due to the influence of material and process, the service life of rubber diaphragm cannot be guaranteed, on the other hand, due to the small amount of such products, the number of manufacturers is not much, and the cost of obtaining parts is high.

[0003] Therefore, the utility model guarantees the original design requirement, uses the domestic commonly used process technology, changes into piston type structure, greatly reduces the process cost, and improves the reliability and service life of the product. UTILITY MODEL CONTENT

[0004] In order to solve the above-mentioned defects, the utility model provides an improved clutch power booster, which solves the problems of complex rubber diaphragm structure, short service life and high maintenance cost of the original power booster.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0006] An improved clutch power booster, comprising a valve body, a cylinder cover and an air inlet cover, the cylinder cover is fixedly connected to the valve body, and the air inlet cover is fixedly connected to the cylinder cover; one side of the valve body is provided with an oil inlet, and is communicated with an oil inlet channel in the valve body, a first oil cavity and a second oil cavity are arranged in the oil inlet channel, and a drain screw is connected to the other end of the oil inlet channel; one side of the air inlet cover is provided with an air inlet, and is communicated with an air inlet channel in the air inlet cover, a first air cavity and a second air cavity are arranged in the air inlet channel; a first spring, a valve, a second spring, a top rod and a top rod piston are arranged in the internal space formed between the valve body, the cylinder cover and the air inlet cover, the first air cavity is communicated with an exhaust channel in the top rod through an air inlet valve, and the exhaust channel is communicated with the outside atmosphere through a third air cavity and an exhaust port; an oil pump piston, a third spring and a cylinder piston are arranged in the internal space formed between the valve body and the cylinder cover, one end of the third spring is abutted against the inner wall of the valve body, the other end is abutted against the cylinder piston, the cylinder piston comprises a piston rod and a piston body which are integrally inserted and pressure cast, and one end of the piston rod away from the piston body is abutted against the oil pump piston.

[0007] Further, the top rod and the top rod piston are in split type structure.

[0008] Further, the top rod piston is provided with a bushing outside, the top rod piston moves in the bushing, and the movement direction of the top rod piston is limited by the bushing.

[0009] Further, the top rod is provided with a limiting boss to limit the active stroke of the top rod.

[0010] Further, the valve body and the cylinder cover and the cylinder cover and the air inlet cover are detachably fixedly connected through bolts.

[0011] The beneficial effects produced by the above technical scheme are:

[0012] 1. By setting the cylinder piston as a piston rod and a piston body, the integrated insert is pressure cast, which improves the structural strength, forming efficiency and machining precision, brings unprecedented production efficiency to the manufacturing industry, greatly reduces the process cost, and improves the reliability and service life of the product.

[0013] 2. By setting the top rod piston and the top rod as a split structure, the error caused by the form and position tolerance can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a structural section schematic view of an embodiment of the utility model;

[0015] Figure 2 is a structural schematic view of the cylinder piston in the embodiment of the utility model;

[0016] Figure 3 is an enlarged schematic view of A part in the embodiment of the utility model. Figure 1

[0017] REFERENCE NUMERALS

[0018] 1. Valve body; 101, oil inlet; 102, oil inlet channel; 1021, first oil cavity; 1022, second oil cavity; 103, oil drain screw; 2, cylinder cover; 3, air inlet cover; 301, air inlet; 302, air inlet channel; 3021, first air cavity; 3022, second air cavity; 4, first spring; 5, valve; 6, second spring; 7, top rod; 701, exhaust channel; 7011, third air cavity; 7012, exhaust port; 702, limiting boss; 8, top rod piston; 9, air inlet valve; 10, oil pump piston; 11, third spring; 12, cylinder piston; 121, piston rod; 122, piston body; 13, bushing. DETAILED DESCRIPTION

[0019] ​Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0020] Reference Figures 1 to 3 As shown in FIG. 1, an improved clutch booster comprises a valve body, a cylinder cover and an air inlet cover, the cylinder cover is fixedly connected to the valve body, and the air inlet cover is fixedly connected to the cylinder cover; an oil inlet is arranged on one side of the valve body and communicates with an oil inlet channel in the valve body, a first oil cavity and a second oil cavity are arranged in the oil inlet channel, and a drain screw is connected to the other end of the oil inlet channel; an air inlet is arranged on one side of the air inlet cover and communicates with an air inlet channel in the air inlet cover, a first air cavity and a second air cavity are arranged in the air inlet channel; a first spring, a valve, a second spring, a top rod and a top rod piston are arranged in the internal space formed between the valve body, the cylinder cover and the air inlet cover, the first air cavity communicates with an exhaust channel in the top rod through an air inlet valve, and the exhaust channel communicates with the external atmosphere through a third air cavity and an exhaust port; an oil pump piston, a third spring and a cylinder piston are arranged in the internal space formed between the valve body and the cylinder cover, one end of the third spring abuts against the inner wall of the valve body, and the other end of the third spring abuts against the cylinder piston, the cylinder piston comprises a piston rod and a piston body which are integrally embedded and pressure-cast, and one end of the piston rod away from the piston body abuts against the oil pump piston.

[0021] By adopting the above technical scheme, the valve body 1, the cylinder cover 2 and the air inlet cover 3 form an integral whole, the cylinder cover 2 is fixedly connected to the valve body 1 through bolts, the air inlet cover 3 is fixedly connected to the cylinder cover 2 through bolts, and the oil inlet channel 102 and the air inlet channel 302 are arranged in the internal space, are connected through the oil inlet 101, receive the oil pressure conducted by the clutch master pump, are converted, open the air pressure switch, make the air pressure participate in work, generate the boost, and realize the boost effect for the clutch; the cylinder piston 12 in the product of the present application is composed of the piston rod 121 and the piston body 122, is designed by integrally embedded pressure casting, improves the structural strength and the machining precision, under the condition of guaranteeing the original design requirement, uses the domestic commonly used process technology, changes the original relatively complex rubber diaphragm structure into the piston structure, greatly reduces the process cost, and improves the reliability and the service life of the product.

[0022] Reference Figure 1 And Figure 3 The top rod and the top rod piston are in a split structure.

[0023] By adopting the technical scheme, the ejection rod 7 and the ejection rod piston 8 are designed as a split structure, so that errors caused by form and position tolerances can be reduced.

[0024] With reference to Figure 1 and Figure 3 , the ejection rod piston is externally provided with a bushing, the ejection rod piston is movable inside the bushing, and the bushing limits the movement direction of the ejection rod piston.

[0025] By adopting the technical scheme, the bushing 13 is arranged to limit the movement of the ejection rod piston 8 inside the bushing 13 and limit the movement direction of the ejection rod piston 8.

[0026] With reference to Figure 1 and Figure 3 , a limiting boss is arranged on the ejection rod to limit the movable stroke of the ejection rod.

[0027] By adopting the technical scheme, the limiting boss 702 is arranged on the side surface of the ejection rod 7 and arranged in the space of the third air cavity 7011 to limit the movable stroke of the ejection rod 7.

[0028] With reference to Figure 1 , the valve body and the cylinder cover and the cylinder cover and the air inlet cover are detachably fixedly connected through bolts.

[0029] By adopting the technical scheme, the valve body 1 and the cylinder cover 2 and the cylinder cover 2 and the air inlet cover 3 are detachably fixedly connected through bolts, so that the product can be quickly disassembled and maintained.

[0030] Working principle

[0031] Before use, the oil inlet 101 of the valve body 1 is connected with the clutch master pump, the hydraulic oil of the master pump is injected into the oil inlet channel 102, the first oil cavity 1021 and the second oil cavity 1022 are filled, and the air in the oil inlet channel 102 is discharged by using the oil drain screw 103; when not assisted, the compressed air is input to the air inlet channel 302 through the air inlet interface 301 of the air inlet cover 3, the valve 5 is closed, the first air cavity 3021 keeps the system air pressure, and the oil pressure system also has no pressure.

[0032] When the assistance is needed, the hydraulic oil from the clutch master cylinder is introduced into the oil inlet channel 102 through the oil inlet 101, enters the first oil cavity 1021, and the pressure pushes the oil pump piston 10 to go up, but at this time, there is no assistance, another part of the hydraulic oil is introduced into the second oil cavity 1022, and pushes the jack piston 8 to move, acts on the jack 7, and opens the valve 5, at this time, the intake valve port 9 is opened, the compressed air in the first air cavity 3021 enters the second air cavity 3022 through the air inlet channel 302, and because the force receiving area of the cylinder piston 12 is much larger than that of the oil pump piston 10, the pressure generated by the compressed air is superimposed and transmitted to the oil pump piston 10, thereby generating the assistance effect.

[0033] After the assistance is completed, the pressure of the clutch master cylinder is unloaded, the hydraulic oil in the oil inlet channel 102 flows back into the master cylinder, at this time, the jack piston 8 and the jack 7 are reset, the valve 5 re-closes the intake valve port 9, the compressed air in the second air cavity 3022 enters the third air cavity 7011 through the exhaust channel 701, and is discharged into the atmosphere through the exhaust port 7012, and the cylinder piston 12 and the oil pump piston 10 are reset.

[0034] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact through an intermediate medium. Moreover, the first feature can be directly above or obliquely above the second feature, or it can only mean that the first feature is higher than the second feature in horizontal height. The first feature can be directly below or obliquely below the second feature, or it can only mean that the first feature is lower than the second feature in horizontal height.

[0035] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can make equivalent replacement or change according to the technical scheme of the present application and the concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. An improved clutch booster, characterized by: It comprises a valve body (1), a cylinder cover (2) and an air inlet cover (3), the cylinder cover (2) is fixedly connected on the valve body (1), and the air inlet cover (3) is fixedly connected on the cylinder cover (2); The valve body (1) is provided with an oil inlet (101) on one side and communicates with an oil inlet channel (102) in the valve body (1), the oil inlet channel (102) is provided with a first oil cavity (1021) and a second oil cavity (1022), and the other end of the oil inlet channel (102) is connected with a drain screw (103); The air inlet cover (3) is provided with an air inlet (301) on one side and communicates with an air inlet channel (302) in the air inlet cover (3), the air inlet channel (302) is provided with a first air cavity (3021) and a second air cavity (3022); The internal space formed between the valve body (1), the cylinder cover (2) and the air inlet cover (3) is provided with a first spring (4), a valve (5), a second spring (6), a top rod (7) and a top rod piston (8), the first air cavity (3021) communicates with an exhaust channel (701) in the top rod (7) through an air inlet valve (9), and the exhaust channel (701) communicates with the outside atmosphere through a third air cavity (7011) and an exhaust port (7012); The internal space formed between the valve body (1) and the cylinder cover (2) is provided with an oil pump piston (10), a third spring (11) and a cylinder piston (12), one end of the third spring (11) abuts against the inner wall of the valve body (1), the other end abuts against the cylinder piston (12), the cylinder piston (12) comprises an integrally embedded piston rod (121) and a piston body (122) formed by pressure casting, and one end of the piston rod (121) away from the piston body (122) abuts against the oil pump piston (10).

2. The improved clutch booster according to claim 1, wherein: The top rod (7) and the top rod piston (8) are in split structure.

3. The improved clutch booster according to claim 2, wherein: The top rod piston (8) is provided with a bushing (13) outside, the top rod piston (8) moves in the bushing (13), and the bushing (13) limits the movement direction of the top rod piston (8).

4. The improved clutch booster according to claim 3, wherein: The top rod (7) is provided with a limiting boss (702) to limit the activity stroke of the top rod (7).

5. The improved clutch booster as claimed in claim 1 wherein: The valve body (1) and the cylinder cover (2), and the cylinder cover (2) and the air inlet cover (3) are fixedly connected through bolts.

Images