CN1987143B - Clutch oil cylinder for automotive electronically controlled mechanical transmission - Google Patents

Abstract

The utility model relates to a clutch oil cylinder used for an electronically controlled mechanical transmission of an automobile, which belongs to the technical field of oil cylinders, and aims to provide a clutch oil cylinder with high reliability of hydraulic control, simple structure and easy processing. In the present invention, the inner cavity of the oil cylinder is in the shape of an annular step, and the inner diameter of the front end is smaller than the inner diameter of the rear end; the front and rear oil cylinders with different inner and outer diameters are respectively inserted into the annular steps of the inner cavity of the oil cylinder, and between the front and rear oil cylinders and the inner wall of the oil cylinder It is sealed by an oil seal; the piston is a hollow structure, the inner and outer diameters of the front end are smaller than the inner and outer diameters of the rear end, and are in the shape of a ladder. The front and rear ends of the piston are provided with grooves, and the grooves are equipped with Front and rear oil seals matched with the inner wall; springs are set on the outer edge of the piston, and the front end of the piston is connected with the pull wire connected to the clutch release device; the oil cylinder body is provided with oil inlet and outlet oil holes. The oil cylinder of the invention has the characteristics of simple structure, easy processing and high reliability of hydraulic control, and can realize the functional requirements of quick separation and slow combination.

Description

Clutch oil cylinder for automotive electronically controlled mechanical transmission

Technical field:

The invention relates to an oil cylinder, in particular to a clutch oil cylinder for an automobile electronically controlled mechanical transmission.

Background technique

At present, the control of the clutch of the electronically controlled mechanical transmission of automobiles basically adopts motor control or hydraulic control. The reliability of the motor control is poor, and its transmission generally requires a screw and a guide rail, which have relatively large wear and poor lubrication effect. The hydraulic control has high requirements on the processing precision of the oil cylinder, the sealing is not easy to solve, and the structure is relatively complicated.

Invention content:

The technical problem to be solved by the present invention is to provide a clutch oil cylinder with high hydraulic control reliability, simple structure and easy processing. Its technical scheme is: the inner cavity of the oil cylinder is in the shape of an annular step, and the inner diameter of the front end is smaller than the inner diameter of the rear end; the front and rear oil cylinders with different inner and outer diameters are respectively inserted into the annular steps of the inner cavity of the oil cylinder, and the front and rear oil cylinders are connected to the inner wall of the oil cylinder. The piston is sealed by an oil seal; the piston is a hollow structure, the inner and outer diameters of the front end are smaller than the inner and outer diameters of the rear end, and are in the shape of a ladder. The front and rear ends of the piston are provided with grooves, and the grooves are equipped with The front and rear oil seals are matched with the inner wall of the rear oil cylinder; the outer edge of the piston is equipped with a spring, and the front end of the piston is connected with the pull wire connected to the clutch release device; the oil cylinder body is provided with oil inlet and outlet oil holes.

The surfaces of the front and rear oil cylinders are rough.

A spring seat is arranged on the outer edge of the piston in the front oil cylinder.

The cylinder body is provided with a pressure relief hole.

Compared with the prior art, its technical effect is: since the front and rear oil cylinders adopt a detachable, segmented, and stepped combination structure, and the surfaces of the front and rear oil cylinders are rough surfaces, it is not only convenient for manufacturing and processing, but also easy to use. Disassembly and maintenance; the spring and the piston are used to make full use of the elastic function of the spring. Under the double reaction of the spring and the hydraulic oil, the piston moves back and forth in the oil cylinder, thereby driving the quick separation and slow combination of the clutch. The control reliability is high; the hollow piston is adopted, on the one hand, it is convenient to combine with the pull wire, and on the other hand, it is convenient to connect with the sensor.

Description of drawings:

Fig. 1 is a schematic diagram of the structure of the present invention.

Detailed ways:

As shown in FIG. 1 , the oil cylinder of the present invention is not integrated with the oil cylinder body 8 . The internal cavity of the oil cylinder is in the shape of an annular step, and the inner diameter of the front end is smaller than the inner diameter of the rear end. The oil cylinder is divided into a front oil cylinder 1 and a rear oil cylinder 2, both of which have different inner and outer diameters and are respectively made of steel pipes with high surface roughness. The inner and outer diameters of the front oil cylinder are smaller than the inner and outer diameters of the rear oil cylinder. The front and rear oil cylinders of different inner and outer diameters are respectively embedded in the annular steps of the inner cavity of the oil cylinder, and are sealed by oil seals 12 and 13 between the front and rear oil cylinders and the inner wall of the oil cylinder. Piston 3 is a hollow structure, the inner and outer diameters of the front end are smaller than the inner and outer diameters of the rear end, and are in the shape of a ladder. The front and rear ends of the piston 3 are provided with grooves, and the grooves are provided with holes to match the inner walls of the front and rear oil cylinders. The front and rear oil seals 4,5. Set spring 7 on the outer edge of piston, be provided with spring seat 11 on the piston outer edge in the front oil cylinder. The oil cylinder block is provided with an oil hole 9 for oil inlet and outlet, and the separation and combination of the clutch can be realized through loading and unloading of hydraulic oil. In order to unload the oil pressure in the oil cylinder when the oil cylinder is out of control, the oil cylinder body is also provided with a pressure relief hole 10 . Under normal conditions, the pressure relief hole of the oil cylinder is blocked. The front end of the piston is connected with the backguy 6 connecting the clutch release device. Pull wires, pistons and springs can realize linear parallel feed and reverse under the action of hydraulic oil. The rear end of the piston is connected with a sensor to measure the amount of movement of the pull wire.

Its working principle: the pull wire 6 connected to the clutch release device, under the action of the clutch diaphragm spring, pulls the pull wire to the left through the clutch release device, and the compression spring 7 drives the piston 3 and the pull wire to move to the right, so that the pull wire is in a tensioned working state . When the hydraulic oil enters the closed oil chamber through the oil hole 9, the hydraulic oil acts on the rear end of the piston 3 to make the piston move to the right, and under the double action of the compression spring 7 and the hydraulic oil, it drives the cable to move to the right, thereby realizing the clutch. Quick separation. When the hydraulic oil is discharged from the closed oil chamber through the oil hole 9, under the return action of the clutch die spring, the clutch release device drives the pull wire and the piston to move to the left, and under the double reaction of the compression spring and the hydraulic oil, it can realize Slow engagement of the clutch.

Claims (4)

1. the clutch oil cylinder that automobile electric control mechanical type speed variator is used comprises cylinder body (8), piston and oil sealing, it is characterized in that: described cylinder body (8) inner chamber is stepped ringwise, and front inner diameter is less than back end inside diameter; The forward and backward oil cylinder (1,2) in different inside and outside footpaths is bumped into respectively on the ring ladder of cylinder body inner chamber, is sealed by oil sealing (12,13) between forward and backward oil cylinder and the cylinder body inwall; Piston (3) is a hollow structure, and the inside and outside footpath of its front end all less than inside and outside footpath, rear end, is scalariform, and the front and back ends of piston (3) is equipped with groove, is provided with the forward and backward oil sealing (4,5) that cooperates with forward and backward oil cylinder inner wall in the groove; Pocketed springs (7) on the outer rim of piston (3), the front end of piston (3) connects with the backguy that is connected clutch release assembly (6); Cylinder body (8) be provided with fuel feeding into and out of oilhole (9).

2. the clutch oil cylinder of using according to the described a kind of automobile electric control mechanical type speed variator of claim 1, it is characterized in that: the surface of described forward and backward oil cylinder (1,2) is a roughened surface.

3. the clutch oil cylinder of using according to the described a kind of automobile electric control mechanical type speed variator of claim 1 is characterized in that: piston (3) outer rim before described in the oil cylinder (1) is provided with spring seat (11).

4. the clutch oil cylinder of using according to the described a kind of automobile electric control mechanical type speed variator of claim 1, it is characterized in that: described cylinder body is provided with pressure relief vent (10).

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