JPS61244929A - Clutch - Google Patents

Abstract

PURPOSE:To restrain heat generation due to sliding by contacting a driven side friction plate to a drive side friction plate for a short time and releasing, and separating immediately. CONSTITUTION:When a solenoid valve 31 is opened and closed by a predetermined frequency, a piston 15 in a hydraulic cylinder 16 makes a reciprocating motion at an identical frequency to connect a driven side friction plate 12 to a drive side friction plate 11, and the driven side friction plate 12 is separated from a drive side disc 5 after a predetermined time, and this action is repeated. As the result, when angular velocity W is increased step by step and becomes the same as that of a drive shaft 1, a driven shaft 2 stops opening and closing motion of the solenoid valve, than heat generation due to sliding is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a clutch, and more particularly to a clutch drum which is connected to a drive shaft and includes a clutch drum having annular drive-side friction plates arranged in parallel in the axial direction attached to the inner wall. a drive-side disk;
The attachment of an annular passive friction plate to the outer periphery of the drive friction plate, which is axially juxtaposed with the drive friction plate, relates to a clutch comprising a driven shaft arranged concentrically with the drive friction plate.

Prior art and its problems The pressing force of the connecting element holder, which is attached to the disc on the driving side or the passive side and is pressed against the mating disc during operation, is interrupted at short time intervals at the time of startup, and the mating disc of the connecting element is Patent Application No. 59-205892 (October 1982) discloses a clutch that reduces the slippage J between the two discs by repeatedly press-fitting the plates for short and short periods of time, thereby connecting the two discs smoothly and silently.
(filed on the 1st of the month). The clutch described in this application reduces slippage between both discs by repeatedly press-contacting the other disc with the connecting element provided on one disc for a short period of time at the start of operation. This reduces friction and heat generation between the disc and the connecting element, thereby extending the life of the clutch, in contrast to conventional clutches that cause considerable slippage in the connecting element during startup. However, the clutch of the above-mentioned application has a complicated structure because the connecting elements attached to the disk on the driving side or the passive side are formed of a large number of hydraulic cylinders arranged adjacent to the outer periphery of the disk. Increase manufacturing costs.

OBJECTS OF THE INVENTION The purpose of the present invention is to reduce the pressing force applied to the driving side friction plate attached to the clutch drum on the driving side disc and the passive side friction plate on the driven shaft juxtaposed to these in a short period of time. To obtain a clutch which gradually accelerates a passive shaft and silently and smoothly connects it to a driving shaft by reducing "slip" by repeating short-term pressure contact of both friction plates at intervals.

The above objects of the present invention include: a driven shaft arranged coaxially with one end adjacent to the end of the driving shaft; and a driving side disc adjacent to the one end and rotatably mounted on the driven shaft. and an annular drive-side friction plate attached to the inner wall of the clutch drum attached to the surface of the drive-side disk opposite to the one end of the driven shaft, and a drive-side friction plate attached to the outer periphery of the driven shaft. The clutch connects the passive shaft to the drive side disk by a ring-shaped passive friction plate arranged in parallel with the drive side 11% plate and pressed against the drive side friction plate via a hydraulic mechanism, the clutch connecting the passive shaft to the drive side disk. The side disk is attached to the flywheel through a large number of elastic members such as helical springs and leaf springs arranged between the end surface of the flywheel provided at the end of the drive shaft and the drive side disk. The hydraulic pressure of this cylinder is characterized in that the pressure oil supply source connected to the hydraulic mechanism is equipped with a pressure oil pulsation mechanism. It is equipped with an inching control mechanism to adjust the characteristics as desired.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the apparatus of the present invention will be described below with reference to an embodiment shown in the accompanying drawings.

Referring to FIG. 1, a book is provided with a driven shaft 2 arranged coaxially on the right end of a drive shaft 1, and a drive-side disc 5 rotatably fitted on the outside of this driven shaft 2. An inventive clutch 50 is shown. The passive shaft 2 has a first diameter-reduced portion 2a from the right.
, a second reduced diameter portion 26° and a third reduced diameter portion 2C, and the third reduced diameter portion 2C is a recess 27 provided at the center of the right end of the drive shaft l.
It is mated to The drive shaft l is provided with a flywheel 3 at the right end. The drive side disc 5 is a flexible joint 2 which will be explained below.
It is connected to the flywheel 3 of the drive shaft 1 via 9.

The drive side disk 5 has a clutch drum 8 attached to its right surface, that is, the surface opposite to the left end of the driven shaft 2. The clutch drum 8 has a large number of annular drive 91Q friction plates 11 slidably attached thereto through a holding cylinder 9 fitted into the inner wall. The passive shaft 2 has a clutch hub 13 attached to the first reduced diameter portion 2α. 14 indicates a key for fixing the clutch hub 13 on the driven shaft. A large number of annular passive friction plates 12 are slidably attached to the clutch knob 13 via a holding sleeve 10 fitted on the outside thereof. Each passive side friction plate 12 is arranged alternately with each drive side friction plate 11 in the axial direction.

A hydraulic cylinder 16 that presses the passive-side vibration plate 12 against the drive-side friction plate 11 is installed on the right side of the clutch drum 8, and the piston 15 is pressed against the drive-side friction plate 1 via the pusher 23.
2. The clutch hub 13 is provided with a return spring 20 for separating the pressure receiving side friction plate 12 and the driving side friction plate 11 which are pressed together. An oil passage 25 connected to a pressure oil pump 30, which will be described later, is provided in the axial direction inside the passive shaft 25 and is connected to the hydraulic cylinder 16 via a radial passage 25R. A low-pressure oil oil passage 26 connected to another pressure oil supply source (not shown) is provided inside the driven shaft 2 parallel to the oil passage 25, and both friction plates are connected to each other through a radial passage 26R. connected to the arranged space,
The pressure oil that has cooled these friction plates is discharged from the outlet 28 of the clutch drum 8.

The flexible joint 29 connects the drive-side disc 5 to the flywheel 3 provided at the right end of the drive shaft 1.
It is composed of a large number of leaf springs 19 arranged radially between the drive-side disc 5 and the drive-side disc 5.

The flywheel 3 has a joint disc 4 attached to the right surface.
It is equipped with The coupling disc 4 comprises a concentric tubular support member 7 located adjacent to and inside the outer circumference of the flywheel 3 and projecting in the direction of the drive disc 5 . The drive-side disc 5 has a tubular knob 21 that projects toward the flywheel 3 adjacent to its inner peripheral portion that fits into the second reduced-diameter portion 2b of the driven shaft 2.

As shown in FIG. 2, a large number of strip-shaped leaf springs 19 with pleats 44 are arranged radially in the space between the joint disc 4 and the drive-side disc 5, and each leaf spring 19 is attached to the tubular knob 21 at its inner end and to the tubular support member 7 at its outer end. Reference numeral 6 indicates a stopper ring that is fitted on the outside of the tubular support member 7 and prevents the leaf spring 19 from coming off. Reference numeral 24 designates a stopper ring that is fitted inside the tubular hub 21 and prevents the leaf spring 19 from deviating from its axial direction. Reference numeral 17 indicates measurement protrusions provided on the respective outer peripheries of the drive-side disc 5 and the joint disc 4. Reference numeral 18 indicates a proximity relay for measurement that is attached to the housing 45 at a position facing the outer periphery of the drive-side disc 5 and the joint disc 4.

If necessary, a stopper pin 22 that limits the twisting angle of the joint disc 4 relative to the drive side disc 5 is inserted between both discs 4 and 5.
is inserted in the axial direction into a portion adjacent to the protrusion 17 of. The flexible joint 29 not only absorbs sudden changes in rotation of the drive shaft l, but also functions as a torsion I meter.

FIG. 3 shows a modification of the flexible joint attached to the clutch 50 of FIG. 1. A plurality of drive side disks 5 are arranged on the left end surface adjacent to the outer periphery at equal intervals and protrude to the left side (
In the figure, four horizontal protrusions 62 are provided. In addition, the flywheel 3 has the horizontal protrusion 62 on the right end surface.
The same number of horizontal protrusions 63 are provided between two adjacent horizontal protrusions 62 and spaced apart by 5 degrees.

A helical spring 61 is inserted between the mutually opposing sides of the horizontal protrusion 63 on the flywheel 3 and the horizontal protrusion 62 on the drive-side disc 5 that are adjacent to each other.

64 is a horizontal protrusion 62 inserted into one end of the helical spring 61
The upper clasp is shown, and 65 is a cap metal fitting that is placed over the opposite end of the helical spring 61 and then fixed to the side surface of the horizontal projection 64.

Further, 66 indicates a core material made of soft rubber that is inserted into the inside of the helical spring 61.

FIG. 4 shows another modified embodiment of the flexible joint for use in the clutch 50 of FIG. A helical spring 71 is embedded in a soft rubber column 78, and each end is covered with a cap 72, 73. The columnar bodies 78 are placed in the longitudinal direction between the flywheel 3 and the drive-side disc 5, and are arranged at equal intervals adjacent to the outer periphery of the drive-side disc 5. The flywheel 3 has a cap 7 of each columnar body 78 on the right end surface.
3, and the drive-side disk 5 has a recess 74 on its left end surface that accommodates the cap 72. The columnar body 78 connects the left and right end caps 73 and 72 to the recesses 7, respectively.
5.74, and is fixed in place by a bolt 77 inserted from the left side of the flywheel 3 and a bolt 76 inserted from the right side of the drive side disc 5.

Fig. 5 shows the piping of the pressure oil pump 30 that supplies pressure oil to the hydraulic cylinder 16. The pipe 32 is connected to an oil passage 25 (FIG. 1) provided in the driven shaft 2. A solenoid valve 31 that opens and closes in response to a 1-100 Hz pulse signal is installed adjacent to the pressure oil pump 30, and one end is connected to the discharge pipe 3 through a conduit 40.
2, and the opposite end is connected to an oil tank 34 through a discharge pipe 41. Suction pipe 35 and discharge pipe 3 of pressure oil pump 30
A bypass pipe 36 is provided to connect the two. A pressure regulating valve 37 is attached to the bypass pipe 36 and connected to the pressure regulating mechanism 38 by a lead 44. Pressure adjustment mechanism 3
8 is connected to the discharge pipe 32 by a conduit 39, and the pressure inside the pipe is adjusted to 3-5 so/crI. 42 and 43 indicate a pressure gauge and an orifice respectively attached to the discharge pipe 32.

During operation, the drive shaft 1 and the drive-side disc 5 connected to the drive shaft 1 through the flexible joint 29 rotate at a predetermined rotation speed, and the pressure oil pump 30 also pumps low-pressure oil for cooling the friction plates. pump(
(not shown) also starts rotating, and the two sets of friction plates 1 of the clutch
1.12 is assumed to be in a non-pressure state. In this state, the pressure oil on the discharge side of the pressure oil pump 30 is discharged into the oil tank 34 via the solenoid valve 31. However, solenoid valve 3
1 at a predetermined frequency, the piston 15 in the hydraulic cylinder 16 reciprocates at the same frequency, connects the passive side friction plate 12 to the drive side friction plate 11, and separates it from the drive side disk 11 after a predetermined time. and repeat this operation. As a result, the passive shaft 2 moves at an angular velocity W in a stepwise manner as shown in FIG.
increase.

When the angular velocity of the passive shaft 2 becomes the same as the angular velocity of the drive shaft 1, the opening and closing movement of the solenoid valve 31 is stopped, and the solenoid valve 31 is placed in the closed position so as to maintain the piston 15 in the operating position.

Effects of the Invention As shown above, in the present invention, the passive side friction plate 12 presses and releases the driving side friction plate 11 for a short period of time and then immediately separates, thereby reducing "slip" and suppressing heat generation. can. Furthermore, by setting the pressure adjustment mechanism 38 provided adjacent to the pressure oil pump 30, the pressure in the hydraulic cylinder 16 can be quickly and easily adjusted. Furthermore, by selecting a pulse signal applied to the solenoid valve 31, the passive shaft 2
It is possible to control the "connection J" of the clutch as desired, such as the frequency and time consumption of the opening/closing movement performed by the solenoid valve 31 until the zero angular velocity reaches the desired value.

4. Additional relations The present invention is a connecting element installed between the driving side disc and the driven shaft, and is attached to the outer periphery of the passive side disc of Japanese Patent Application No. 59-205892, and is attached to the driving side disc during use. This invention is an improvement over the invention of Japanese Patent Application No. 59-205892 in that manufacturing costs are reduced by employing conventional annular friction plates on the driving side and the passive side instead of a large number of hydraulic pistons that are pressed into contact with each other.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view showing the device of the present invention, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is a modified embodiment of the flexible joint used in the device of Fig. 1. 4 is a detailed view showing another modified embodiment of the flexible joint used in the device shown in FIG. 1; FIG. 5 is a diagram showing the hydraulic piping system of the device shown in FIG. 1; FIG. 6 is a diagram showing the operation of the main parts of the device shown in FIG. 1. 1 Drive shaft 2 Passive shaft 3 Flywheel 4
Joint disc 5 Drive side disc 6 Stopper ring 7
Tubular support member 8 Clutch drum 9
Holding cylinder lO holding sleeve 11 Drive side friction plate 12 Passive side friction plate 13 Clutch hub 14
Key 15 Piston 16 Hydraulic cylinder 17
Outer protrusion 18 Proximity relay 19 Leaf spring 20 Return spring 21
Tubular hub 22 Stopper 23
Pusher 24 Stopper 25
High pressure oil passage 26 Low pressure oil passage 27 Recess 28 Cooling outlet 29 Flexible joint 30 Pressure oil pump 31 Solenoid valve 32 Pressure oil supply pipe N~ 34 Oil tank 35 Suction pipe 36 Bypass 37 Pressure adjustment valve 38 Adjustment mechanism 39 Conduit 40 Conduit 41 Drain pipe 42 Pressure gauge 43 Orifice 44 Pitch 45 Housing 50 Device of the invention 60 Modified embodiment of flexible joint 61
Helical spring 62 Horizontal protrusion 64 Stopper 65 Cap fitting 66 Core material 70 Another modified example of flexible joint 71
Hanging spring 72
Cap 73 Upper 74 Recess 75 Recess 76 Bolt 77 Bolt 78 Soft rubber column-m-

Claims (1)

[Claims] A driven shaft is arranged coaxially with one end adjacent to the end of the drive shaft, and a drive-side disk adjacent to the one end and rotatably mounted on the driven shaft. An annular drive-side friction plate attached to the inner wall of the clutch drum attached to the surface of the drive-side disc on the opposite side from one end and the drive-side friction plate attached to the outer periphery of the driven shaft are arranged alternately in parallel. The clutch connects a passive shaft to a drive side disc by a circular driven friction plate that is pressed against the drive side friction plate through a hydraulic mechanism, wherein the drive side disc connects the drive side disc to the drive shaft. The flywheel is flexibly connected to the flywheel through a large number of elastic members such as helical springs and leaf springs arranged between the end face of the flywheel provided at the end and the drive side disc. A clutch characterized in that a pressure oil supply source connected to a hydraulic mechanism includes a pressure oil pulsation mechanism.