JPS60249734A - Clutch booster - Google Patents

Abstract

PURPOSE:To simplify the structure of clutch booster by constructing with a power piston, a control valve, first rotary lever of output rod, a wire, second rotary lever of booster housing and a coupling rod. CONSTITUTION:A clutch booster 4 having power cylinder section 11 and control valve section 12 is constructed with a power piston 15 first rotary lever 54 supported by an output rod, a wire for coupling with a clutch pedal, second rotary lever 58 supported by the housing 13, first coupling rod 59, and second coupling rod 63. Since the clutch pedal and the control valve for booster are coupled through mechanical link means comprised of the wire, two rotary levers and two coupling rods, the structure can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION a. Industrial Application Field The present invention relates to a clutch booster equipped with a power piston and a control valve, and particularly relates to a clutch booster that connects the control valve and the Taranochi pedal by a mechanical link means, and The present invention relates to a clutch booster that employs at least one rotary lever as a component and rotatably attaches the rotary lever to an output rod so that clutch pedal depression force can be applied in the forward movement direction of the output rod.

b. Prior art A conventional clutch booster was put into practical use, for example, in 1984-142.
As shown in Publication No. 743, the clutch pedal depression force is converted into oil pressure by a mask cylinder, and this oil pressure is used to control the opening and closing of the control valve of the booster. It was structurally complex, such as requiring the provision of a hydraulic cylinder section, and was disadvantageous in terms of cost.

C0 Object of the Invention The present invention has been developed to effectively solve the above-mentioned problems, and its object is to provide a clutch booster that is structurally simple.

d1 Structure of the Invention The gist of the present invention is to provide a clutch booster that boosts the operating force of the clutch pedal and transmits it to the clutch lever.
) Connected via the clutch lever and output rod,
a) a power piston driven by fluid pressure supplied from an external pressure source; and b) a power piston disposed in a passage for supplying the fluid pressure to the power piston so as to move and operate in the forward movement direction of the output rod. c) a first rotary lever whose intermediate portion is rotatably supported by the output rod; and d) one end of which is connected to the clutch pedal and the other end of which is connected to the rotary lever. a connecting cable connected to one end and stretched along the forward movement direction of the output lot;
) a second rotary lever whose intermediate portion is rotatably supported by the housing of the clutch booster; f) the other end of the first rotary lever; and one end of the second rotary lever. g) the control valve described above;
The clutch booster is characterized in that it is provided with a second connecting rod that connects the other end of the second rotary lever.

e. Example An example of the present invention will be described below based on the drawings. FIG. 1 shows an outline of the clutch operating device,
In the figure, 1 is a transmission, 2 is a handle,
3 is a clutch pedal, 4 is a clutch booster, 5 is a compressor, 6 is a near reservoir, 7.8 is an air pipe, and 9 is a clutch lever. More specifically, the clutch booster 4 has a power cylinder section 11 and a control valve section 12, as shown in FIG. The power cylinder section 11 is composed of a cylindrical cylinder shell 14 attached to a housing 13 and a power piston 15 disposed within the cylinder shell 14.
is constantly biased in the direction of arrow a in FIG. 2 by a return spring 16 disposed within the cylinder shell 14. A cylinder hole 17 extending in the axial direction of the cylinder shell 14 is formed in the housing 13, and a guide bush 18 is fixedly fitted into the cylinder hole 17. The tip of a rod 19 attached to the power piston 15 is slidably inserted into the guide bush 18.

A relay piston 23 is inserted into the cylinder hole 17. Receiving holes 24 are provided at both ends of this relay piston 23.
．． 25 are respectively formed, and the tip end of the rod 19 is removably inserted into one of the receiving holes 24. Further, the interstellar joint portion 27 of the output rod 26 is inserted into the other receiving hole 25 and then fixed by caulking.

And an output rod 26 protruding outside the cylinder hole 17
An end portion of the clutch lever 9 is connected to the clutch lever 9 via a support fitting 28. The output rod 26 protruding from the cylinder hole 17 is covered with a retractable boot 32 to prevent water, dust, etc. from entering the cylinder hole 17.

Next, the control valve section 12 will be explained.

This control valve part 12 is attached to a housing 13.

The valve lifter 32 includes a valve assembly 31 attached thereto, and a valve lifter 32 slidably disposed within the housing 13. A pressure supply port 33 is provided at the end of the valve assembly 31, and the pressure of the near reservoir 6 is supplied to the pressure supply port 33 through an air pipe 8. A valve chamber 34 communicating with the pressure supply port 33 is formed inside the valve assembly 31, and a rubber valve body 35 is housed within the valve chamber 34. This valve body 35 is urged leftward in FIG. 2 by a compression spring 36, and normally the valve seat 37
It is crimped.

On the other hand, the valve lifter 32 is biased leftward in FIG. 2 by a compression spring 38, and the tip 32a of the valve lifter 32 is normally separated from the valve body 35. An exhaust passage 39 is formed inside the valve lifter 32 along its axial direction. One end of this exhaust passage 39 is an exhaust port 4 formed at the tip 32a of the valve lifter 32.
0, and the other end is connected to the exhaust assembly 41. This exhaust assembly 41 has a check valve 42 and is configured to perform only an exhaust function. The other end of the exhaust passage 39 is connected to the atmospheric pressure chamber 44 of the power cylinder section 11 through a passage 43 in the housing 13.
Furthermore, it is also connected to the cylinder hole 17 through another passage 45 .

A variable pressure chamber 50 is formed between the valve body 35 and the valve lifter 32. This variable pressure chamber 50 is connected to the pressure chamber 52 of the power cylinder section 11 by a pipe 51, and when the valve lifter 32 moves rightward in FIG.
The compressed air in 4 is introduced into a pressure chamber 52 through a variable pressure chamber 50 and a pipe 51.

A fulcrum pin 53 is provided on the support fitting 28, and an intermediate portion of a first rotating lever 54 is rotatably attached to this fulcrum pin 53. One end of this rotating lever 54 is connected to the first
As shown in the drawings and FIG. 2, it is connected to the clutch pedal 3 by a wire 55. The end of the wire 55 connected to the rotating lever 54 is stretched in the forward movement direction of the output rod 26 (indicated by arrow C in FIG. 2), and when the clutch pedal 3 is depressed, the wire 55 55 is configured to be pulled in the direction of arrow d in FIG. On the other hand, a support plate 5 is attached to the housing 13 near the control valve section 12.
6 is attached to the supporting plate 56, and an intermediate portion of a second rotating lever 58 is rotatably attached to a fulcrum pin 57 provided on the support plate 56. And this second rotating lever 58
and the other end of the first pivot lever 54 are interconnected by a first connecting rod 59 and a pin 60,61. Also, the other end of the second rotating lever 58.

The proximal end of a second connecting loft 63 is attached by a pin 62 to the valve lifter 3 through the insertion hole 64 of the housing 13.
2 is inserted into the receiving hole 65 at the rear end of 2.

The clutch booster 4 is configured as described above, and in a so-called servo state where compressed air is supplied to the pressure supply port 33, the depression force of the clutch pedal 3 is boosted by the clutch booster 4 and transmitted to the clutch lever 9. be done. That is, when the clutch pedal 3 is depressed, the wire 5
5 is pulled in the direction of arrow d in FIG. 2, and the first rotating lever 54 rotates in the direction of arrow e in the same figure about the fulcrum pin 53.

When the first rotating lever 54 rotates in the direction of arrow e, the first
The connecting rod 59 moves in the direction of arrow f and rotates the second rotating lever 58 in the direction of arrow g. When the second rotating lever 58 rotates in the direction of the arrow g, the second connecting rod 63 moves in the direction of the arrow and presses the valve lifter 32, and the valve lifter 32 resists the compression spring 38 due to this pressing force. move in a direction. As a result, the valve body 35 is pressed and lifted by the tip portion 32a of the valve lifter 32, the exhaust port 40 is closed by the valve body 35, and the valve seat portion 37 is opened.

The compressed air from the near reservoir 6 is then introduced into the pressure chamber 52 of the power cylinder section 11 in the order of air piping 8 -> pressure supply port 33 - valve chamber 34 - variable pressure chamber 50 -> vibrator 51, and this pressure causes the power piston 15 to return to its original position. 16 in the direction indicated by the arrow in FIG. This power piston 1
The forward force of 5 is transmitted to the output rod 26 via the rod 19 and the relay piston 23, and the output rod 26 moves forward in the direction of arrow C in FIG. The forward force of the output rod 26 is further transmitted to the thalasso-tile lever 9 via the support fitting 28, and the thalasso-tile lever 9 rotates in the direction of arrow i in FIG. 2, thereby releasing the clutch (not shown). At this time, excess air due to changes in the volume of the cylinder hole 17 and the atmospheric pressure chamber 44 is exhausted from the exhaust terrace assembly 41 to the outside through the passage 43.45.

Next, when the clutch pedal 3 is released, the valve lifter 32
is moved back as shown in FIG. 2 by the pressure of the compression spring 38 and the variable pressure chamber 50, the valve seat portion 37 is closed by the valve body 35, and the exhaust port 40 is opened, and the power cylinder portion 1
The compressed air in the pressure chamber 52 of
Exhaust is exhausted to the outside in the following order: → exhaust port 40 → exhaust passage 39 - exhaust terrace assembly 41. As a result, the pressure in the pressure chamber 52 decreases to atmospheric pressure, and the power piston 15 returns to the position of the spring 1.
6, it moves back in the direction of arrow a as shown in FIG. Further, the thalassotile lever 9 is moved to a second position by a reciprocating means (not shown).
As shown in the figure, the clutch is connected by rotating in the direction of arrow j, and the output rod 26 and relay piston 2
3 is pushed by the clutch lever 9 and moves back to the state shown in FIG. At this time, a portion of the compressed air flowing through the exhaust passage 39 flows into the atmospheric pressure chamber 44 and the cylinder hole 17 through the passage 43.45, allowing the volume of the atmospheric pressure chamber 44 and the cylinder hole 17 to change.

The operation of the clutch booster 4 in the servo state has been described above, but the clutch booster 4 can operate the clutch even in a so-called non-servo state where compressed air is not supplied to the pressure supply port 33, such as when the vehicle is parked. That is, when the clutch pedal 3 is depressed in the non-servo state, the valve lifter 32 moves forward in the direction of the arrow in FIG. 2, as in the servo state described above. Then, when the wire 55 is further pulled in the direction of arrow d in FIG. 2 from the state where the valve lifter 32 is in contact with the stopper portion 66 of the housing 13, the first rotating lever 54 is centered around the pin 60 and closed as shown in FIG. Rotate counterclockwise and remove the support fittings.

The output rod 26 and the relay piston 23 integrally move forward in the direction of arrow C in FIG. As a result, clutch lever 9
is rotated in the direction of arrow i in FIG. 2, and a clutch (not shown) is disengaged. At this time, the power piston 15 is stopped at the position shown in FIG. 2, and the tip of the rod 19 is separated from the relay piston 23.

Next, when the clutch pedal 3 is released, the clutch lever 9
is rotated in the direction of arrow j in FIG. 2 by the return movement means to connect the clutch, and the output rod 26 and relay piston 23 are pushed by the thalassotile lever 9 and return to the state shown in FIG. . Further, the valve lifter 32 is moved back by the compression spring 38 as shown in FIG.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment and can be modified in various ways.

10 Effects of the Invention As described above, the present invention includes attaching a rotating lever to the output rod of the clutch booster, connecting one end of the rotating lever to the clutch pedal with a connecting cable, and connecting the other end of the rotating lever to the clutch pedal. is connected to a control valve via first and second connecting rods and a second rotating lever, and when the clutch pedal is depressed and the connecting cable is pulled in the forward movement direction of the output rod, the control is performed. Since the valve is designed to open, in the servo state where fluid pressure is supplied to the clutch booster, the clutch pedal depression force can be boosted and transmitted to the thalassotile lever in the same way as a normal booster, and Even in a non-servo state where fluid pressure is not supplied to the ramp booster, the clutch pedal depression force can be applied to the output rod in the forward direction through the connecting cable and the first rotary lever. Manual clutch operation is possible. Therefore, for example, if the transmission is in a low gear and parked for a long time, even if the clutch booster is in a non-servo state due to the engine stopping, the clutch can be manually disengaged, so the transmission can be shifted to the neutral position one by one. The engine can be started without having to return to

Furthermore, since the clutch pedal and the control valve of the booster are connected by a so-called mechanical link means consisting of a connecting cable, first and second rotating levers, and first and second connecting rods, the clutch booster is It is structurally simpler than the conventionally used so-called fluid link means consisting of a mask cylinder and hydraulic piping, and can reduce the cost of peripheral equipment for the booster. Furthermore, since the hydraulic cylinder portion of the clutch booster is not required, the structure of the booster itself can be simplified and its cost can be reduced. Furthermore, since no fluid link means is employed, maintenance can be simplified, such as by eliminating the need for periodic inspections of the amount of brake fluid used in the fluid link means.

In addition, since the control valve is disposed so as to move in the forward movement direction of the output rod to open the valve, it is similar to the conventional clutch booster, so when applying the present invention to the conventional clutch booster, There is no need to significantly change the valve and its surrounding structure, and the present invention can be applied relatively easily.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a schematic configuration diagram of a clutch operating device, and Fig. 2 is a vertical sectional view of a clutch booster. 3... Clutch pedal, 4 ...Clutch booster,
9... Thalassochile lever, 11... Power cylinder section, 12... Control heart section, 15... Power piston, 26... Output lot, 3
1... Valve assembly, 32... Valve lifter, 33... Pressure supply port, 35... Valve body (control valve)
, 41... Exhaust assembly, 54... First rotating lever, 55... Wire (connection cable), 58...
Second rotating lever, 59...first connecting rod, 6
3...Second connecting rod. Figure 1

Claims (1)

[Scope of Claims] A clutch booster that boosts the operating force of a grunch pedal and transmits it to a clutch lever, which a) is connected to the thalasso-tile lever via an output rod and is driven by fluid pressure supplied from an external pressure source; b) a control valve disposed in a passage for supplying the fluid pressure to the power piston so as to move and operate in the forward movement direction of the output lot; and C) an intermediate portion configured to provide the output. a tenth rotary lever rotatably directed to the rod; and d) one end connected to the clutch pedal, the other end connected to one end of the rotary lever, and the forward movement of the output rod. e) a second rotary lever whose intermediate portion is rotatably supported by the housing of the clutch booster; and f) No. 1 of the first rotary lever. A first connecting rod that connects one end of the rotary lever of the terminal whistle 2; g) a second connecting rod that connects the control valve and the other end of the second rotary lever; A clutch booster characterized by comprising a connecting rod and the following.