JP4406380B2 - Fluid actuator for vehicle and method for manufacturing the same - Google Patents

Description

  The present invention relates to a fluid actuator for a vehicle and a method for manufacturing the same, and more particularly to a fluid actuator for a vehicle that is assembled in a state in which a working fluid is filled in a pipe connecting a master cylinder and a slave cylinder.

  As a fluid actuator for vehicles, for example, there is an actuator for operating a clutch for an automobile. The fluid actuator for the clutch connects the master cylinder and the slave cylinder for the clutch with a pipe, transmits the hydraulic pressure generated in the master cylinder to the slave cylinder via the pipe, and operates the slave cylinder to operate the clutch. Manipulate.

  In such a fluid actuator for a clutch, the master cylinder and the slave cylinder are connected to a pipe that has been processed into a predetermined length and a predetermined shape in advance before being attached to a vehicle, and hydraulic fluid is supplied to the inside thereof. A vehicle assembly process is simplified by assembling in a filled state and attaching to the vehicle in this assembled state.

A fluid actuator for a clutch attached to a vehicle is such that the slave cylinder is disposed in the vicinity of a clutch in an engine room, and the master cylinder is a position at which the master cylinder can be operated with an operator connected to a clutch pedal or the like, Usually, it arrange | positions in the engine room near a driver's seat (for example, refer patent document 1).
Japanese Patent Publication No. 60-14215

  In the thing of patent document 1, although the part by the side of the push rod of a master cylinder protrudes in a vehicle interior, the whole master cylinder is not arrange | positioned in a vehicle interior, but with a master cylinder from the relationship of a vehicle layout. It did not correspond to arranging a slave cylinder across a wall.

  Therefore, the present invention provides a fluid actuator for a vehicle that can dispose a master cylinder and a slave cylinder with a wall portion interposed therebetween, and can greatly improve the degree of freedom of vehicle layout, and a method for manufacturing the same. It is aimed.

To achieve the above object, the state first invention of the vehicle hydraulic actuator of the present invention includes a master cylinder and the slave cylinder is connected by a pipe, filled with hydraulic fluid the master cylinder, the slave cylinder and the pipe In the vehicle fluid actuator that is assembled to the vehicle in this assembled state, the master cylinder and the vehicle are connected to a reservoir tank formed separately from the master cylinder via a hose. Provided in the grommet that can close the opening formed in the wall part that partitions the vehicle compartment and the engine room in such a size that the pipe and the hose that are bent according to the mounting state can pass therethrough the piping tubing insertion hole of the tube insertion holes and the hose passage hole, shape the hose to the hose through hole penetrating respectively In assembly, the grommet in this state is engaged with the inner peripheral edge of said opening, said master cylinder to said passenger compartment, said slave cylinder being characterized in that to be able to respectively installed in the engine room.

The second invention is characterized in that, in the first invention, the system from the reservoir to the slave cylinder is filled with hydraulic fluid .

The vehicle fluid actuator method invention of the present invention is a method of manufacturing the vehicle fluid actuator, wherein when the pipe is inserted and penetrated into the pipe insertion hole of the grommet, at least in the pipe. Insert the pipe insertion hole insertion side into the pipe insertion hole in an unprocessed state, then process the connection part of the pipe end and bend the pipe, and finally connect the master cylinder and slave cylinder to both ends of the pipe. It is characterized by connecting each.

In the first invention of the fluid actuator for vehicles of the present invention, the master cylinder and the slave cylinder can be arranged with the vehicle wall portion interposed therebetween, so that the degree of freedom in vehicle layout can be improved.

Further, the installation position of the reservoir tank can be freely set without being limited to the vicinity of the master cylinder.

Furthermore, the slave cylinder can be arranged in the engine room, and the master cylinder can be arranged in the vicinity of the driver's seat in the passenger compartment. Moreover, the master cylinder can be easily passed by forming the opening in consideration of the connection state of the pipe.

The second invention is suitable for an actuator of a clutch system that is assembled in a state filled with hydraulic fluid.

In the invention of the method of the fluid actuator for vehicles according to the present invention, the manufacturing is easier as compared to inserting a pipe subjected to bending or the like into the grommet.

  FIG. 1 is a piping system diagram showing an embodiment in which a fluid actuator for a vehicle according to the present invention is applied to a vehicle clutch, FIG. 2 is a front view showing a state where a grommet through which piping penetrates is attached to an opening, and FIG. 4 is a sectional view taken along the line III-III, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 2, and FIG. 5 is a front view showing a state in which both ends of the pipe penetrating the grommet are flared.

  The clutch master cylinder 10 and the slave cylinder 20 used for the vehicle clutch are connected in advance using a metal pipe 40 and a rubber hose 41 together with a reservoir 30 for the clutch master cylinder. The pipe 40 and the hose 41 pass through the pipe insertion hole 51 and the hose insertion hole 52 of the grommet 50 that closes the opening 42a provided in the wall 42 of the vehicle, and are held by the wall 42 by the grommet 50. The clutch master cylinder 10 is disposed in the vehicle compartment, and the slave cylinder 20 and the reservoir 30 are disposed in the engine room, with the wall 42 interposed therebetween.

  In addition, the pipe 40 is subjected to bending processing according to the vehicle mounting state by a parts manufacturer, and is further assembled in a state in which the system from the reservoir 30 to the slave cylinder 20 is filled with clutch fluid. In the state, the parts are shipped from the manufacturer to the vehicle assembly company. The vehicle assembly company does not perform any machining such as bending of the pipe 40, and the clutch master cylinder 10, the slave cylinder 20, the reservoir 30, the pipe 40, etc. It is formed so that it can be attached to.

  The clutch master cylinder 10 and the slave cylinder 20 have the same basic configuration as a hydraulic cylinder, and cylinder bodies 11 and 21 that serve as housings, and bottomed cylinders that are formed in the cylinder bodies 11 and 21. Holes 11a and 21a, pistons 12 and 22 inserted into the cylinder holes 11a and 21a in a fluid-tight and movable manner, and hydraulic chambers 13 and 23 defined at the bottom of the cylinder holes 11a and 21a, Mounting portions 11b and 21b to the vehicle are provided on the outside. Connectors 14 and 24 are inserted into the pipe connection holes 11c and 21c communicating with the hydraulic chambers 13 and 23, respectively, and the ends of the pipes 40 whose ends are flared into the connectors 14 and 24 are flare nuts 40a. , 40a, the hydraulic chambers 13 and 23 are in communication with each other through the pipe 40.

  A piston rod 15 is inserted into the opening side of the cylinder hole 11 a of the clutch master cylinder 10, and a piston rod 25 is inserted into the opening side of the cylinder hole 21 a of the slave cylinder 20. Is covered by a protective boot 26. Further, the clutch master cylinder 10 is connected to a hose connection hole 11d communicating with the hydraulic pressure chamber 13 with a connector 16 attached to the tip of the hose 41, whereby the hydraulic pressure chamber 13 and the reservoir 30 communicate with each other. Become. The slave cylinder 20 is provided with a bleeder hole 21 d communicating with the hydraulic pressure chamber 23, and a bleeder screw 27 is attached. After the vehicle is mounted, an operating element 17 such as a clutch pedal is connected to the outer end of the piston rod 15 of the clutch master cylinder 10, and the tip of the release fork 28 for clutch comes into contact with the outer end of the piston rod 25 of the slave cylinder 20. Provided.

  As described above, the opening 42a of the vehicle is formed in such a size and shape that the clutch master cylinder 10 assembled in a state where the pipe 40 and the hose 41 are connected can be inserted. Considering the outer shape of the master cylinder 10 and the connection state of the pipe 40 and the hose 41, an oval opening is formed.

  The grommet 50 includes a grommet main body 53 provided with a groove-like engaging portion 53b that engages with the inner peripheral edge of the opening 42a on the outer periphery of an oval flat plate portion 53a corresponding to the shape of the opening 42a, and the flat plate portion 53a. The pipe insertion hole 51 and the hose insertion hole 52 provided in the vicinity of the central portion of the pipe. The pipe insertion hole 51 and the hose insertion hole 52 respectively have holding cylinders 51a and 52a protruding on both sides of the grommet main body 53, and a plurality of annular protrusions 51b respectively protruding from the inner circumferences of the holding cylinders 51a and 52a. , 52b holds the pipe 40 or the hose 41 in an airtight and watertight state. The holding cylinders 51 a and 52 a are provided with the axes of the holding cylinders 51 a and 52 a inclined with respect to the flat plate part 53 a of the grommet main body 53 so that the pipe 40 and the hose 41 are obliquely penetrated with respect to the wall part 42. ing.

  Further, the holding cylinder (pipe holding cylinder) 51a through which the metal pipe 40 is inserted has a larger protruding amount to both sides than the holding cylinder 52a through which the hose 41 is inserted, and as shown in FIG. The protrusion amount on one side (right side in FIG. 4) is formed larger than the protrusion amount on the other side (left side in FIG. 4), and the two annular protrusions 51b are provided on the inner periphery of each tip. Further, on both surfaces of the grommet main body 53, annular grooves 53c and 53c surrounding the base portion of the holding cylinder 51a are provided at positions asymmetric with respect to the flat plate portion 53a.

  By holding the piping 40 and the hose 41 penetrating the wall portion 42 using the grommet 50 formed in this way, the piping 40 and the hose 41 can be securely closed while closing the opening 42a having an inner dimension several times larger than the outer diameter of the piping. The hose 41 can be reliably held. Further, since the holding cylinder (pipe holding cylinder) 51a for holding the metal pipe 40 is supported via the annular grooves 53c and 53c with respect to the flat plate portion 53a, the portion where the annular grooves 53c and 53c are provided. By deforming the thin wall portion, it is possible to cope with displacement of the pipe assembly angle and displacement of the position, and vibration can be effectively absorbed. In particular, by providing the annular grooves 53c and 53c asymmetrically on both surfaces of the flat plate portion 53a, even if the grooves are deepened to improve the flexibility of the annular grooves 53c and 53c, the strength of the grommet body 53 is ensured and excessively increased. It is possible to improve the retainability of the pipe 40.

  Further, the vibration can be effectively absorbed by the deformation of the annular grooves 53c and 53c provided at the asymmetric position, and the displacement of the pipe 40 and the holding cylinder 51a due to the vibration can be suppressed. Furthermore, by providing the annular protrusions 51b on the inner circumferences of both tip portions of the holding cylinder 51a, the holding cylinder 51a is elastically deformed even if the pipe 40 and the holding cylinder 51a are greatly displaced due to vibration or the like. Adhesion between the annular protrusion 51b and the pipe 40 can be ensured. In particular, even when one of the annular protrusions 51b and the pipe 40 are separated from each other due to a large displacement, if the other annular protrusion 51b and the pipe 40 are in close contact with each other, sufficient sealing performance is obtained. Secured. Further, since the protruding amount of the holding cylinder 51a on both sides of the flat plate portion is different, the holding cylinder 51a having a small protruding amount has the holding ability of the pipe 40 and the holding cylinder 51a having a large protruding amount according to each deformable amount. The sealing performance of the pipe 40 can be improved.

  The assembly of such a fluid actuator for a clutch is performed as follows. First, the pipe material 40 ′ cut to a predetermined length is inserted into the pipe insertion hole 51 of the grommet 50 as it is without being subjected to a bending process or the like. Next, as shown in FIG. 5, both ends of the piping material 40 'are inserted into the flare nuts 40a and 40a, and then the flare processing FP is applied to both ends of the piping material 40'. Then, the pipe 40 is formed by applying a predetermined bending process to a predetermined position of the pipe material 40 ′.

  Both ends of the pipe 40 subjected to the flare processing and the bending processing are connected to the pipe connection holes 11c and 21c of the clutch master cylinder 10 and the slave cylinder 20 formed separately through the connectors 14 and 24, and the hose. 41 is inserted into the hose insertion hole 52 of the grommet 50 and penetrated, and one end is connected to the hose connection hole 11 d of the clutch master cylinder 10 and the other end is connected to the hose connection part 30 a of the reservoir 30. Finally, vacuum suction is performed from the bleeder hole 21 d to cause the clutch liquid in the reservoir 30 to flow into the system, and the system from the reservoir 30 to the slave cylinder 20 is filled with the clutch liquid.

  The fluid actuator for the clutch assembled in this way is shipped from the parts manufacturer to the vehicle assembly company, and the vehicle assembly company moves the clutch master cylinder 10 with the pipe 40 and the hose 41 connected from the engine room side. The grommet 50 is attached to the opening 42a by drawing into the vehicle compartment through the opening 42a. Accordingly, the pipe 40 and the hose 41 are held in an airtight and watertight state while obliquely penetrating the wall portion 42 by the grommet 50 fitted into the opening 42a having a size through which the clutch master cylinder 10 can pass. In the passenger compartment, the clutch master cylinder 10 is attached at a predetermined position to connect the operation element 17. On the engine room side, the slave cylinder 20 is attached at a predetermined position, the pipe 40 is appropriately fixed, and the reservoir 30 is attached at a predetermined position. Thereby, by operating the operation element 17 with a clutch pedal or the like, the piston 12 moves to the bottom side of the cylinder hole 11 a via the piston rod 15, and a hydraulic pressure is generated in the hydraulic pressure chamber 13. This hydraulic pressure is transmitted to the hydraulic pressure chamber 23 of the slave cylinder 20 through the pipe 40, and the piston 22 is moved to the opening side of the cylinder hole 21a and the piston rod 25 is protruded to operate the release fork 28.

  The fluid actuator for vehicles of the present invention can be used for applications other than clutches, and can also be applied to those in which a reservoir is integrated with a master cylinder. Further, instead of the clutch master cylinder, a slave cylinder may be passed through the opening. The present invention can also be applied to pipes that connect the master cylinder and the slave cylinder with other equipment interposed.

It is a piping system diagram of a clutch for vehicles showing an example of the present invention. It is a front view showing the state where the grommet which piping similarly penetrated was equipped in the opening. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is IV-IV sectional drawing of FIG. It is a front view which shows the state which carried out the flare process to the both ends of piping which penetrated the grommet.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Clutch master cylinder, 20 ... Slave cylinder, 11, 21 ... Cylinder body, 11a, 21a ... Cylinder hole, 11b, 21b ... Mounting part, 11c, 21c ... Pipe connection hole, 11d ... Hose connection hole, 21d ... Breeder hole , 12, 22 ... piston, 13, 23 ... hydraulic chamber, 14, 16, 24 ... connector, 15, 25 ... piston rod, 17 ... operator, 26 ... protective boot, 27 ... bleeder screw, 28 ... release fork, DESCRIPTION OF SYMBOLS 30 ... Reservoir, 40 ... Piping, 40a ... Flare nut, 40 '... Piping material, 41 ... Hose, 42 ... Wall part, 42a ... Opening, 50 ... Grommet, 51 ... Piping insertion hole, 52 ... Hose insertion hole, 51a, 52a ... holding cylinder, 51b, 52b ... annular projection, 53 ... grommet body, 53a ... flat plate portion, 53b ... engagement portion, 53c ... annular groove

Claims (3)

A master cylinder and the slave cylinder is connected through a pipe, the master cylinder is assembled in a state filled with hydraulic fluid to the slave cylinder and the pipe, the hydraulic actuator for a vehicle mounted on a vehicle in this assembled state, the master cylinder The master cylinder is connected to a reservoir tank formed separately from the master cylinder via a hose, and the pipe and the hose, which are bent according to the mounting state of the master cylinder and the vehicle, can pass therethrough. In the pipe insertion hole provided in the grommet capable of closing the opening formed in the wall portion partitioning the vehicle compartment and the engine room at the pipe insertion hole and the pipe insertion hole of the hose insertion hole, the pipe in the hose insertion hole assembled state of the hose penetrating each, the grommet of this state is engaged with the inner peripheral edge of the opening, the mass Cylinder into the passenger compartment, a fluid actuator for a vehicle, characterized in that the slave cylinder has to be placed respectively in the engine room. 2. The vehicle fluid actuator according to claim 1, wherein a hydraulic fluid is filled in a system from the reservoir to the slave cylinder . The method for manufacturing a fluid actuator for a vehicle according to claim 1 or 2 , wherein when the pipe is inserted through the pipe insertion hole of the grommet and at least the pipe insertion hole insertion side of the pipe is not processed. The vehicle is characterized in that it is inserted into the pipe insertion hole in the state, then the connection end of the pipe end and the bending of the pipe are processed, and finally the master cylinder and the slave cylinder are respectively connected to both ends of the pipe. Manufacturing method for fluid actuator.

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