Power-assisting oil cylinder and its clutch power-assisting system

Abstract

The present invention discloses a power-assisting oil cylinder, comprising a shell and a piston arranged in the shell, the shell is provided with an oil inlet and an oil outlet connected with the inside of the shell, the outer end of the piston is connected with a pulling connecting rod for pulling the power-assisting, the piston is a hollow structure, a push rod is provided in the piston and can be moved in the piston for corresponding connection with a pedal, the inner end of the piston is arranged corresponding to the oil inlet, the inner end of the piston is connected with the cavity of the shell, a power-assisting annular groove is arranged at the outer edge of the inner end of the piston corresponding to the oil inlet, the inner end of the piston is provided with a switch hole for controlling the power-assisting annular groove to be connected with the hollow structure of the inner end of the piston, and the inner end of the push rod is arranged corresponding to the switch hole of the inner end of the piston. By pushing the push rod to retract, the power-assisting oil pressure drives the piston rod to retract and pull the power-assisting, the clutch operation is labor-saving and easy to operate, and the structure is compact and easy to arrange and install.

Description

Technical Field

[0001] The invention relates to the technical field of oil cylinder boosting, in particular to a pull-type boosting oil cylinder and a clutch boosting system thereof. Background Art

[0002] At present, most large mechanical vehicles are equipped with clutch assist systems, which assist the clutch operation through the assist cylinder, so as to achieve labor-saving and easy operation of the clutch operation. However, most of the current clutch assist cylinders are assist cylinders that push the pistons to extend for assisting, which has a complex structure and is not easy to arrange and install. Summary of the invention

[0003] In view of the deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a power-assisting oil cylinder and a clutch power-assisting system thereof, wherein the power-assisting oil cylinder is a pulling power-assisting oil cylinder and has a compact structure.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A power-assisting oil cylinder comprises a shell and a piston arranged in the shell, the shell is provided with an oil inlet and an oil outlet connected with the interior of the shell, the outer end of the piston is connected with a pulling connecting rod for pulling the power-assisting oil, the piston is a hollow structure, the piston is provided with a push rod which can move in the piston and is connected with a pedal, the inner end of the piston is arranged corresponding to the oil inlet, the inner end of the piston is connected with the cavity of the shell, the outer edge of the inner end of the piston is provided with a power-assisting annular groove corresponding to the oil inlet, the inner end of the piston is provided with a switch hole for controlling the power-assisting annular groove to be connected with the hollow structure of the inner end of the piston, and the inner end of the push rod is arranged corresponding to the switch hole of the inner end of the piston.

[0006] The oil inlet and the oil outlet on the shell are both arranged on one side of the shell, and the other end of the pull connecting rod correspondingly arranged on the shell is provided with a fixing hole for fixing the oil cylinder.

[0007] The housing is provided with a shield for covering the extended part of the piston.

[0008] The end of the pulling connecting rod connected to the piston is provided with a fork hole, and the part of the push rod extending from the outer end of the piston is located in the fork hole.

[0009] A limiting pad is arranged inside the housing, and a piston return spring is arranged inside the housing between the limiting pad and the inner end of the piston.

[0010] A switch spring acting on the push rod is arranged inside the hollow structure at the inner end of the piston.

[0011] The piston comprises a main piston and a piston rod which are detachably connected. The main piston is arranged corresponding to the oil inlet. The outer end of the piston rod is connected to the pulling connecting rod. The main piston and the piston rod are provided with correspondingly connected piston inner holes. The push rod is movably arranged in the piston inner hole.

[0012] The outer end of the pulling connecting rod is provided with a connecting head for connecting with a clutch, and the connecting head is provided with a waist-shaped connecting hole.

[0013] A through hole for connecting the interior of the main piston and the cavity of the shell is provided at the center of the end of the main piston, the switch spring is arranged corresponding to the through hole, and a limiting column for inserting into the switch spring is provided at the inner end of the push rod.

[0014] A clutch assist system includes an oil pump, a clutch pedal and a clutch, and also includes the assist oil cylinder. The outlet of the oil pump is directly or indirectly connected to the oil inlet of the assist oil cylinder. The clutch pedal is provided with a pedal tongue for pushing the push rod to retract, and the outer end of the pulling connecting rod is connected to the clutch.

[0015] Compared with the prior art, the present invention has the following advantages: the power-assisting oil cylinder and its clutch power-assisting system have reasonable structural design, and the power-assisting oil pressure drives the piston rod to retract and pull the power-assisting by pushing the push rod to retract. The clutch operation is labor-saving and easy to operate, and the structure is compact and easy to arrange and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following is a brief description of the contents and symbols in the drawings of this specification:

[0017] Figure 1 Schematic diagram of the booster oil cylinder of the present invention Figure 1 .

[0018] Figure 2 Schematic diagram of the booster oil cylinder of the present invention Figure 2 .

[0019] Figure 3 Schematic diagram of the booster oil cylinder of the present invention Figure 3 .

[0020] Figure 4 For along Figure 3 AA section diagram.

[0021] Figure 5 for Figure 4 A partial enlarged schematic diagram is shown in the figure.

[0022] In the figure:

[0023] 1. Shell, 101. Cylinder cavity, 102. Overflow connecting hole, 103. Blockage, 2. Oil inlet, 3. Overflow valve, 4. Oil outlet, 5. Protective cover, 6. Pull connecting rod, 601. Fork hole, 602. Connecting head, 6021. Connecting hole, 7. Push rod, 8. Limit pad, 9. Piston return spring, 10. Main piston, 1001. Switch hole, 11. Switch spring, 12. Piston rod. DETAILED DESCRIPTION

[0024] The specific implementation modes of the present invention will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0025] like Figures 1 to 5 As shown, the power-assisting oil cylinder comprises a housing 1 and a piston arranged in the housing. A cylinder cavity is arranged in the housing. The piston can move axially along the housing cylinder cavity and is arranged in the cylinder cavity 101.

[0026] The housing 1 is provided with an oil inlet 2 and an oil outlet 4 which are connected to the interior of the housing, and a relief valve 3 is provided on the housing. The oil inlet, the oil outlet and the relief valve are arranged side by side, and the relief valve is located between the oil inlet and the oil outlet, with a compact structure.

[0027] A boss is provided on one side of the shell 1, and the oil inlet and the oil outlet are both provided on the boss. A relief valve mounting hole is provided on the boss, and an overflow connecting hole 102 is provided between the relief valve mounting hole and the oil outlet along the axial direction of the piston. A plug 103 is provided on the shell corresponding to the overflow connecting hole to facilitate processing and prevent overflow oil from overflowing.

[0028] The outer end of the piston is connected to a pulling connecting rod 6 for pulling the power assist, and the pulling connecting rod 6 can be connected to the operating rod of the clutch. The piston is a hollow structure, and a push rod 7 is provided in the piston, which can be moved in the piston and connected to the pedal. The inner end of the piston is arranged corresponding to the oil inlet, and the inner end of the piston is connected to the cavity of the shell. The outer edge of the inner end of the piston is provided with a power assist annular groove corresponding to the oil inlet, and the inner end of the piston is provided with a switch hole 1001 for controlling the communication between the power assist annular groove and the hollow structure of the inner end of the piston. The inner end of the push rod is arranged corresponding to the switch hole of the inner end of the piston.

[0029] When the clutch is not working, the oil enters the boost annular groove from the oil inlet, then enters the inner cavity of the housing through the switch hole, and finally flows back from the oil outlet, and no boost work is generated. The clutch pedal pushes the push rod to retract, and after the push rod retracts, the switch hole at the inner end of the piston is closed, thereby isolating the oil inlet from the inner cavity of the housing, and the oil pressure in the boost annular groove pushes the piston to retract, and the piston drives the connecting rod to retract and pull the boost, which has a compact structure and does not require other valve structures to be set in the housing, making it easy to arrange and install.

[0030] The oil inlet and the oil outlet on the housing 1 are both arranged on one side of the housing, and the other end of the pull connecting rod correspondingly arranged on the housing is provided with a fixing hole for fixing the oil cylinder, and the structure is compact.

[0031] The piston includes a main piston 10 and a piston rod 12 which are detachably connected. The main piston is arranged corresponding to the oil inlet, the switch hole is arranged on the main piston, the outer end of the piston rod is connected to the pulling connecting rod 6, and the main piston and the piston rod are provided with correspondingly connected piston inner holes, and the push rod is movably arranged in the piston inner hole; the structure is compact and the push rod is convenient to be installed in the piston.

[0032] A shield 5 for covering the extended part of the piston is provided on the housing. The shield covers the extended part of the piston rod and mainly plays a dust-proof role.

[0033] A fork hole 601 is provided at the end of the pull connecting rod 6 connected to the piston, the part of the push rod extending from the outer end of the piston is located in the fork hole, and the pedal tongue on the clutch pedal is arranged in the fork hole, the structure is compact and the operation is stable.

[0034] A limit pad 8 is provided inside the housing 1, and a piston return spring 9 is provided between the limit pad and the inner end of the piston inside the housing; a switch spring 11 acting on the push rod is provided inside the hollow structure of the inner end of the piston.

[0035] The outer end of the pull connecting rod 6 is provided with a connecting head 602 for connecting with the clutch, and the connecting head is provided with a waist-shaped connecting hole 6021, which is convenient for connecting with the clutch operating rod.

[0036] A through hole is provided at the center of the end of the main piston 10 for connecting the interior of the main piston and the cavity of the shell. The switch spring is arranged corresponding to the through hole. The inner end of the push rod 7 is provided with a limiting column for inserting into the switch spring 11. The structure is compact, and the opening and closing of the switch hole is controlled by the movement of the inner end of the push rod.

[0037] The push rod is a cylinder, which is divided into two sections, one is a small diameter section, and the other is a large diameter section. The small diameter section is mainly located in the piston rod, and the large diameter section is mainly located in the main piston, thereby limiting the push rod; a sealing ring is provided on the outer edge of the piston to seal between the inner wall of the housing cylinder body, and the operation is stable and reliable.

[0038] The clutch assist system includes a fuel tank, an oil pump, a clutch pedal, a clutch and an assist cylinder. The outlet of the oil pump is directly or indirectly connected to the oil inlet of the assist cylinder. The clutch pedal is provided with a pedal tongue for pushing the push rod to retract. The pedal tongue is located in the fork hole and pulls the outer end of the connecting rod to connect with the clutch.

[0039] A steering gear is arranged between the oil pump and the power-assisting oil cylinder, which is connected to the oil inlet of the power-assisting oil cylinder through the overflow port of the steering gear, and the oil outlet of the power-assisting oil cylinder is connected to the oil tank.

[0040] It is connected to the upper end of the clutch pull rod group and the pull rod. The power source uses the steering gear return oil to connect to the oil inlet of the oil cylinder, and the oil output of the oil cylinder is connected to the oil tank return oil. When working, the fork on the clutch pedal is used to push the push rod to operate the oil inlet and outlet switch of the oil cylinder, so that the piston moves to pull the clutch rocker arm to complete the clutch separation function; there are few pipelines, easy installation, low cost, safety and reliability.

[0041] A hydraulic safety valve is formed by the switch spring corresponding to the push rod, and there is no need to equip a one-way constant flow valve separately. A return spring is added to the piston so that the piston can return freely. The operating switch adopts transverse sealing to prevent explosion-proof phenomenon caused by axial sealing, and the operation is stable and reliable.

[0042] The power-assisting oil cylinder and its clutch power-assisting system have reasonable structural designs. By pushing the push rod to retract, the power-assisting oil pressure drives the piston rod to retract and pull the power-assisting oil. The clutch operation is labor-saving and easy to operate. The structure is compact and easy to arrange and install.

[0043] The above is only an explanation of the preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0044] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A booster oil cylinder, comprising a housing and a piston arranged in the housing, wherein the housing is provided with an oil inlet and an oil outlet connected to the interior of the housing, characterized in that: The outer end of the piston is connected to a pulling connecting rod for pulling the booster. The piston is a hollow structure. A push rod is provided in the piston and can move in the piston for corresponding connection with the pedal. The inner end of the piston is arranged corresponding to the oil inlet. The inner end of the piston is connected to the cavity of the shell. The outer edge of the inner end of the piston is provided with a booster annular groove corresponding to the oil inlet. The inner end of the piston is provided with a switch hole for controlling the booster annular groove to be connected with the hollow structure of the inner end of the piston. The inner end of the push rod is arranged corresponding to the switch hole of the inner end of the piston. The oil inlet and the oil outlet on the shell are arranged at On one side of the shell, a fixing hole for fixing the oil cylinder is provided at the other end of the pull connecting rod corresponding to the one provided on the shell, a protective cover for covering the protruding part of the piston is provided on the shell, a fork hole is provided at the end of the pull connecting rod connected to the piston, and the push rod extending from the outer end of the piston is located in the fork hole, an overflow valve mounting hole is provided on the shell, and the overflow valve mounting hole is located between the oil inlet and the oil outlet, an overflow connecting hole is provided between the overflow valve mounting hole and the oil outlet along the axial direction of the piston, and a plug is provided on the corresponding overflow connecting hole on the shell.

2. The booster cylinder according to claim 1, characterized in that: A limiting pad is arranged inside the housing, and a piston return spring is arranged inside the housing between the limiting pad and the inner end of the piston.

3. The booster cylinder according to claim 1, characterized in that: A switch spring acting on the push rod is arranged inside the hollow structure at the inner end of the piston.

4. The booster cylinder according to claim 1 or 3, characterized in that: The piston comprises a main piston and a piston rod which are detachably connected. The main piston is arranged corresponding to the oil inlet. The outer end of the piston rod is connected to the pulling connecting rod. The main piston and the piston rod are provided with correspondingly connected piston inner holes. The push rod is movably arranged in the piston inner hole.

5. The booster cylinder according to claim 1, characterized in that: The outer end of the pulling connecting rod is provided with a connecting head for connecting with a clutch, and the connecting head is provided with a waist-shaped connecting hole.

6. The booster cylinder according to claim 4, characterized in that: A through hole for connecting the interior of the main piston and the cavity of the shell is provided at the center of the end of the main piston, a switch spring is provided corresponding to the through hole, and a limiting column for inserting into the switch spring is provided at the inner end of the push rod.

7. A clutch assist system, comprising an oil pump, a clutch pedal and a clutch, characterized in that: It also includes the power-assisted oil cylinder as described in any one of claims 1 to 6, the outlet of the oil pump is directly or indirectly connected to the oil inlet of the power-assisted oil cylinder, and the clutch pedal is provided with a pedal tongue for pushing the push rod to retract, and the outer end of the pulling connecting rod is connected to the clutch.

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