JPS6022209B2 - dual clutch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention consists of a traveling clutch (for main drive) and a PTO clutch (for main drive).
The purpose of this invention is to provide a compact structure in which the PTO clutch is normally turned off (OFF...disconnected) when the clutch is attached to the vehicle.

When the secondary dual clutch release mechanism is released, the PTO clutch is in the ON (ON...connected) state, and the PTO clutch is constantly connected to the work machine via the mesh reducer. Since the travel clutch is connected to the differential via a normal transmission that has a neutral position, in this type of vehicle, the PTO clutch has a long off time, which increases the stress on the clutch mechanism. .

In other words, since there is no mission with a neutral position on the PTO side, the IJ of the PTO clutch in the dark does not operate the work equipment.
It is necessary to hold the PTO clutch in the OFF position by operating the PTO clutch, which deteriorates durability and workability. As a countermeasure to this problem, it is conceivable to adopt a PTO clutch on the PTO clutch side that is connected by pressing the clutch pedal. However, in that case, if a coil spring is used like in a general dual clutch, it will get in the way of installing the spring lever and make it expensive. Moreover, the wear of the friction facings of both clutches has a linear effect on the load reduction, making clutch performance unstable. The present invention employs a PTO clutch that is connected when the clutch pedal is depressed, and furthermore, the load of the disc spring hardly changes within the predetermined usage range of the amount of sag when viewed from the load sag curve, and moreover, it can be used in a small amount of space. Focusing on the point where the load can be obtained,
One disc spring is used for PTO and traveling to obtain the necessary transmission torque characteristics, and will be explained with reference to the drawings as follows.

In the figure, a cover 2 is fastened to a flywheel 1 of an engine with a plurality of bolts (not shown).

The cover 2 has six vertical grooves 4 arranged at equal intervals on the circumference and in the same longitudinal direction.
The cylindrical main body 6 has a cylindrical main body 6 and an annular inward flange 8 projecting inward from the tip of the main body 6 on the side opposite to the flywheel. First, second, and third pressure plates 10, 11, and 36 are arranged between the flywheel 1 and the cover 2 from the flywheel side, and are provided at three locations on the outer periphery of the pressure plate 10. The protrusion 12 is 120
The plate 10 is iron-coupled with the longitudinal grooves 4' spaced apart by o, so that the plate 10 is slidable only in the axial direction (left-right direction in the figure). plate 1
1 is provided with three outer circumferential protrusions 13 that fit into the longitudinal groove 4 at a position shifted by 600 degrees with respect to the longitudinal groove 4', and the outer circumferential protrusions 13 fit into the longitudinal groove 4.
Extend it to the flywheel' side inside the stopper 14.
is formed. An annular step 15 provided on the end surface of the pressure plate 36 on the flywheel side and a protrusion 1 provided on the inner periphery of the pressure plate 11 on the side opposite to the flywheel.
A disc spring 17 is vertically installed between the disc springs 6 and 6, and the pressure of the brake plate 11 at the stopper 14 is brought into contact with the fly hole by the elasticity of the disc spring 17. A facing 19 on the outer periphery of a clutch disc 18 for the PTO clutch is located between the first and second pressure plates 10 and 11, and the clutch disc 18 is connected to the central spline hub 2.
0 is splined onto the PTO axis 21. PTO axis 2
1 is supported by a bearing 22 at the center of the flywheel 1, and the other end is connected to a working machine through a constant-mesh type reduction gear as described above. On the end surface of the cover 2 on the side opposite to the flywheel, there are three pairs of brackets 24 arranged at equal intervals on the same circumference;
Three pairs of brackets 25 are provided which are offset by 600 degrees from each other, and a first release lever 27 is attached to the brackets 24 via a pin 26 in the circumferential direction (direction perpendicular to the plane of the paper). The outer circumferential protrusion 12 of the first pressure plate 10 is connected to the rod 30' via pins 28 and 29 parallel to the pin 26, and the radially inner end of the lever 27 is connected to the PTO via an adjustment bolt 31. It faces the clutch release bearing 32.

33 is a return spring attached to the pin 26.

As shown in the figure, when no pedal force is acting on the rise bearing 32, the first pressure is low.

A rate of 10 keeps the PTO clutch clutch disc 18 in a released state. Between the second pressure plate 11 and the cover 2, there are plate springs 17 in order from the flywheel side.
A third pressure plate 36 and a facing 35 on the outer periphery of the running clutch disc 34 are incorporated, and the pressure plate 36 has protrusions 38 provided at three locations on its outer periphery.
is slidably fitted in the vertical groove 4, and the protrusion 3 is fitted in the vertical groove 4.
8 is connected to rod 40 via pin 39, and rod 4
0 is connected to a position inward from the outer end of the second release lever 42 via a pin 41.

43 is a circumferential pin that supports the lever 42 on the bracket 25.

The inner end of the release lever 42 faces a travel clutch release bearing 45 via an adjustment port 44. The pressure plate 36 presses the facing 35 against the cover 2 by the elasticity of the disc spring 17.

The spline hub 49 of the clutch disc 34 is connected to the main shaft 50
The right end of the main shaft 50 is connected to a differential via a transmission which has a neutral position in a normal vehicle and the same machine. In the illustrated state, PrO clutch B is off and travel clutch A is on. To disengage travel clutch A, operate the travel clutch clutch pedal (not shown) to apply pedal force P to release bearing 45. , and rotate the release lever 42 clockwise about the pin 43 to release the pressure plate 3 against the elasticity of the disc spring 17.
6 to the left in the figure.

To connect PTO clutch B, depress the clutch pedal for the PTO clutch, and then apply depressing force P2 to the rear bearing 32.
Add.

The pressure release lever 27 rotates counterclockwise around the pin 26, thereby moving the pressure plate 10 together with the rod 30 to the right in the figure, bringing the facing 19 into pressure contact with the pressure plate 11, and further increasing the pedal force. When the pressure increases, both pressure plates 10 and 11 move to the right against the elasticity of the disc spring 17 while sandwiching the facing 19.
The pressure force on the facing 19 increases, and the PTO clutch B is connected. As explained above, according to the present invention,
Since the disc spring 17 is adopted and the PTO clutch B is connected by depressing the PTO clutch pedal, the time when stress is applied to the release mechanism is reduced, especially in the above-mentioned vehicle where the PTO is used for a short time. Improves durability.

In addition, in the conventional type, if trouble (damage, etc.) occurs in the release mechanism, the clutch is immediately turned on and the PTO is suddenly turned off.
The shaft rotates and is unstable, but in the case of the present invention, it is in an off state and the power is cut off, so it is safe. Since the disc spring 17 is used for both the PTO clutch and the traveling clutch, not only the operability is improved, but also the use of the disc spring has less influence on the wear of the facings 19 and 35, and the performance is stabilized. Since only one disc spring 17 is required, there is an advantage that the cost is reduced and the entire clutch can be made compact.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view. 1... Flywheel, 2... Cover, 4... Vertical groove, 6... Cylindrical body, 8...
...Inward flange, 10, 11, 36...1st
, second and third pressure plates, 12, 13, 38.
...Protrusion, 14...Stopper, 17.
... Disc spring, 1 8 ... Clutch disc for PTO clutch, 24, 25 ... Bracket, 26
, 43... Focus 27, 42... First and second release levers, 28, 29, 39, 41... Pin, 30, 40...
...Rod, 34...Clutch disk for traveling clutch.

Claims (1)

[Claims] 1. Tighten the cover 2 consisting of the cylindrical body 6 with vertical grooves 4 and the inward flange 8 to the flywheel 1, and
and the cover flange 8 from the flywheel 1 side.
, second and third pressure plates 10, 11, and 36 are arranged, and a protrusion 12 provided on the outer periphery of each pressure plate.
, 13, 38 are slidably fitted into the vertical grooves 4, 4, of the cover 2, and the circumferential fulcrum pins 26, 4 are fitted to the brackets 24, 25 provided on the end surface of the cover flange 8 on the side opposite to the flywheel.
a plurality of first release levers 27 intermediate portions via 3;
The plurality of second release bars 42 each support the outer ends of the clutch in the radial direction, and the second A position closer to the center of the clutch than the fulcrum pin 43 of the release lever 42 and the protrusion 38 of the third pressure plate 36 are connected to the rod 30,
40, the outer peripheral protrusion 13 of the second pressure plate 11 is extended toward the flywheel 1 side to form a stopper 14, and a PTO clutch is connected between the first and second pressure plates 10 and 11. Clutch disk 18, also the third
A clutch disk 34 for the traveling clutch is sandwiched between the pressure plate 36 and the cover flange 8, and the second
, a disc spring 17 is compressed between the third pressure plates 11 and 36, and the clutch disk 18 for the PTO clutch is connected to the first
A dual clutch characterized in that the length of the stopper 14 is determined so that the stopper 14 is released only in normal times when no pedaling force is applied to the release lever 27.