JPH0213773Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a clutch disk replacement mechanism in a clutch, particularly a clutch for an industrial cargo handling vehicle such as a forklift truck.

Prior Art In general, in industrial vehicles for cargo handling such as forklift trucks, the clutch disc is likely to wear out because the clutch is frequently engaged and engaged.

Conventionally, as a method for replacing the clutch disk, for example, in the clutch mechanism shown in Fig. 6,
After removing the universal joint b interposed between the clutch case a and the transmission, and removing the release hub bracket c attached to the clutch case a, pull out the main drive shaft d from the clutch disk e, and remove the clutch cover f and the clutch disk e. The actual situation is that the clutch must be taken out from the clutch case a to be replaced and removed, and this work is extremely troublesome.

Purpose of the invention The present invention is an attempt to improve the conventional situation in view of the above-mentioned circumstances, and the purpose of the present invention is to improve the work efficiency of replacing and attaching and detaching the clutch disk.

Structure of the invention In other words, the invention is to enable the clutch disc to be taken out of the clutch case without removing parts such as the universal joint and release hub bracket, and more specifically, to make it possible to take out the clutch disc from the clutch case without removing parts such as the universal joint and release hub bracket. The shaft is characterized by being able to be pulled out from the clutch case into a recess formed in the universal joint through free rotation of a nut screwed onto one end of the main drive shaft. The gist of the present invention is to provide an opening on the circumferential surface of the clutch case for replacing the clutch disk that is mounted on the main drive shaft that is mounted horizontally within the clutch case, so that the main drive shaft can be moved back and forth in the axial direction. The retainer that supports one end of the main drive shaft on the transmission side is provided with a retaining part for preventing the nut from coming off, which is screwed onto one end of the main drive shaft. The flange is held freely rotatable, while the universal joint connected to the retainer is configured to have a recess for the main drive shaft to enter.

Embodiments Specific embodiments of the present invention will be described below with reference to illustrative drawings. 1 to 4 are drawings showing a first embodiment, and 1 indicates a clutch case. The upper end of the clutch case 1 has an opening 2.
is formed, and the opening 2 is covered with a case cover (not shown).

A crankshaft 3 is mounted on one side wall portion of the clutch case 1, that is, the side wall portion 1' on the engine side.
One end of the crankshaft 3 is provided so as to face inside the clutch case 1, and a flywheel 4 is fixed to one end of the crankshaft 3. Reference numeral 6 denotes a main drive shaft that is horizontally suspended within the clutch case 1 between the front and rear walls 1' and 1'', and one end of the main drive shaft 6 on the side wall 1' side is located at the center of the flywheel 4. One end of the side wall 1'' side is supported by a retainer 9, which will be described later, so that it can move forward and backward. More specifically, the main drive shaft 6 has a threaded portion 14 at one end on the side wall portion 1″ side, a spline tooth portion 6′ on the side wall portion 1′ side, and a spline tooth portion 6′ at one end on the side wall portion 1″ side. The retainer 9 is supported by fitting the spline tooth portion 6' into a spline tooth portion 9' formed on the retainer 9. A clutch disk 10 is rotatably mounted on one end of the main drive shaft 6 on the side wall 1' side via the spline tooth section 6' so as to be freely insertable and removable.

Further, a clutch cover 16 is screwed onto the flywheel 4 so as to cover the clutch disk 10.
7. The clutch cover 16 has a window hole 16' in its center corresponding to the main drive shaft 6, and the release lever 18 is connected to the window hole at the periphery of the window hole 16' via a fulcrum pin 18'. They are pivotally connected at regular intervals along the periphery of 16'. A pressure plate 19 is supported at one end of the release lever 18 on the outer diameter side so as to be movable forward and backward. A spring 20 is interposed between the pressure plate 19 and the clutch cover 16, and the pressure plate 19 is normally biased in the direction of pressing the clutch disk 10 against the flywheel 4. It is set up as shown in
Also, one end of the inner diameter side of the release lever 18 is provided with the window hole 1.
6' facing into the clutch case 1,
One end of the release lever 18 on the inner diameter side is provided so as to be able to come into contact with a bearing collar 22 via a release bearing 23, as will be described later.

A release hub bracket 7 is fixed to the other side wall portion 1'' of the clutch case 1, that is, the side wall portion 1'' on the transmission side, through threaded bolts.The release hub bracket 7 is connected to the hub 7A portion. , clutch case 1 from the same hub 7A section
Consists of a bracket 7B extending inward,
The aforementioned bearing collar 2 is attached to the bracket 7B.
2 is loosely fitted to be slidable in the axial direction via a shift fork (not shown), and one end of the inner diameter side of the release lever 18 is fitted inside the clutch cover 16 via the bearing collar 22 and release bearing 23. It is provided so that it can be pressed in the direction (4 directions of the flywheel).
Further, a retainer 9 is rotatably supported on the hub 7A via a bearing 8. Same retainer 9
A spline tooth portion 9' is provided in the hollow portion so as to pass through the spline tooth portion 9' in the front-rear direction, and one end of the main drive shaft 6 is supported in the spline tooth portion 9' so as to be freely insertable and removable via the spline tooth portion 6'. As mentioned above, one end of the retainer 9 has a threaded portion 1 of the main drive shaft 6 facing the universal joint 11, which will be described later.
A shaft nut 15 (a nut provided with an engagement groove at the head position) which is screwed into the shaft 4 is rotatably supported. That is, the shaft nut 15 consists of a nut main body 15A and a collar 15B integrally formed at the base of the nut main body 15A.
A is screwed into a threaded portion 14 formed on one end of the main drive shaft 6, and the collar portion 15B is rotatably supported on one end of the retainer 9 via a nut stopper 28. The nut body 15A has an engaging groove 3 for a pin 21, which will be described later, at the head position.
0 is provided, while the main drive shaft 6
A pin 2 is provided at one end in correspondence with the engagement groove 30.
A through hole 31 is provided in the diametrical direction, and the pin 21 is inserted into the engaging groove 30 and through the through hole 31 so as to be freely inserted and removed. Further, a universal joint 11 is connected to the retainer 9 via a bolt 12, and the universal joint 11 is connected to the hollow part (spline tooth part 9') of the retainer 9 to connect the transformer of the main drive shaft 6. A recess 13 is formed so that a part of the mission side can enter.

FIG. 5 is a drawing showing another embodiment, and whereas in the above embodiment the retainer 9 and the main drive shaft 6 are provided so as to be engaged with each other by a pin 21, in this embodiment, A ball 24 is provided on the retainer 9 side so as to be always urged toward the hollow portion by a spring 25, while a recess 26 is provided on the main drive shaft 6 side in correspondence with the ball 24. By forcibly fitting the balls 24 into the recesses 26, the drive shaft 6 is connected to the retainer 9.
It is provided so as to engage.

Next, its effect will be explained.

In the embodiment shown in FIGS. 1 to 4, the first
The figure shows a state in which the clutch is assembled so that it can function as a clutch, and the clutch disk is removed from the clutch in a state where it can function as a clutch.
The work to replace the clutch disk is performed as follows.

First, after removing the pin 21, the main drive shaft 6, which is screwed into the nut 15, is pulled out from the clutch case 1 by rotating the shaft nut 15 supported on one end of the retainer 9 using an appropriate tool such as a spanner. operation, i.e., the main drive shaft 6 is connected to the universal joint 11.
The effect of moving in the direction can be obtained. By repeating such operations, the main drive shaft 6 can be pulled out from the clutch disk 10 at one end on the side wall 1' side, and at the same time, the recess formed in the universal joint 11 at one end on the side wall 1'' side can be pulled out. In this way, with the main drive shaft 6 pulled out from the clutch disk 10, the clutch cover 16 is removed from the flywheel 4 via the screws 17, and the clutch cover 16 is removed. By pulling up from the opening 2, the clutch cover 16, pressure plate 19 and clutch disc 10 can be taken out of the clutch case 1.After replacing the clutch disc 10, the clutch cover 16, pressure plate 19 and clutch disc 10 can be removed from the opening 2 again.
Then, insert the clutch cover 16, pressure plate 19, and clutch disk 10 into the clutch case 1, and then tighten the clutch cover 16 with the screws 17.
The main drive shaft 6 is attached to the clutch case by rotating the flanged nut 15' in the opposite direction using an appropriate tool such as a wrench as described above. 1, that is, the clutch 1 is pulled back into the main drive shaft 6 at one end on the side wall 1' side.
A state in which 0 is mounted on the axis is obtained. And like this, connect the clutch disk 10 to the main drive shaft 6.
The through hole 31 and the engagement groove 30
By inserting the pin 21 through the clutch, a state in which the clutch can function again, that is, an assembled state as shown in FIG. 1 is obtained.

Effects of the invention The invention is constructed as described above.
As mentioned above, the main drive shaft that is horizontally mounted on the clutch case is provided so that it can move forward and backward so that the clutch disc that is mounted on the main drive shaft can be pulled out, and one end of the main drive shaft on the transmission side is supported. The retainer supports a flanged nut that is screwed onto one end of the main drive shaft so that it can freely rotate.
The universal joint connected to the retainer has a recess for the main drive shaft to enter.
The main drive shaft, which is screwed into the shaft nut, is provided so that it can be pulled out toward the transmission side through the rotation of the flanged nut. By making it so that it can be pulled out, the clutch disc can be taken out from the clutch case by simply moving the main drive shaft forward and backward without having to take out the universal joint, release hub bracket, etc. as in the conventional case. As a result, the clutch disk can be easily replaced, and the time required for the replacement work can be shortened. Furthermore, with the present invention, the action of pulling out the main drive shaft can be carried out simply by rotating the flanged nut rotatably supported at one end of the main drive shaft. .

[Brief explanation of the drawing]

Figures 1 to 4 are drawings showing the first embodiment, in which Figure 1 is a sectional view showing the entire clutch mechanism, Figure 2 is an exploded perspective view of the universal joint part, and Figure 3 is a cross-sectional view showing the entire clutch mechanism. Cross-sectional view of the spline fitting part of the retainer and main drive shaft, No. 4
The figure is a cross-sectional view of a portion of the castle nut that is screwed into the threaded portion of the main drive shaft. FIG. 5 is a drawing showing another embodiment, and is a sectional view of the spline fitting portion of the retainer and the main drive shaft. FIG. 6 is a sectional view showing a conventional clutch mechanism. 1...Clutch case, 1', 1''...Side wall part,
2...Opening, 3...Crankshaft, 4...
Flywheel, 5...Pilot pairing,
6...Main drive shaft, 6'...Spline teeth, 7...Release hub bracket, 7A
...Hub, 7B... Bracket, 8... Bearing, 9... Retainer, 9'... Spline tooth section,
10...Clutch disk, 11...Universal joint, 12...Bolt, 13...Recess,
14...screw part, 15...cattle nut, 1
5'... Nut with flange, 15A... Nut body,
15B...Brim portion, 16...Clutch cover, 1
6'... Window hole, 17... Screw, 18... Release lever, 18'... Fulcrum pin, 19... Pressure plate, 20... Spring, 21... Pin, 2
1a, 21b...through hole, 22...bearing collar, 23...release bearing, 24...ball, 25...spring, 26...recess, 27...recess, 28...nut stopper, 30...person in charge Matching groove, 31...Through hole.

Claims (1)

[Scope of utility model registration request] An opening for replacing a clutch disc that is mounted on a main drive shaft that is mounted horizontally within the clutch case is provided on the circumferential surface of the clutch case, and the main drive shaft is provided so that the main drive shaft can move forward and backward in the axial direction of the main drive shaft. The retainer that supports one end of the transmission side of the main drive shaft is provided with a retaining part to prevent the nut from coming off, which is screwed onto one end of the main drive shaft, and the collar part of the nut can be freely rotated by the retaining part. A clutch disk replacement mechanism in a clutch, in which the universal joint connected to the retainer is provided with a recess for the entry of the main drive shaft.