JPH04357331A - Locking structure of clutch shaft - Google Patents

Abstract

PURPOSE:To cancel the axial movement regulation of a clutch shaft without taking-out a locking member for regulating the axial movement of the clutch shaft. CONSTITUTION:A release hub 4 is arranged on the periphery of a front cover 1, through which a clutch shaft K having a groove part M is passed through, freely to move in the axial direction, and when the release hub 4 is moved left, a locking pin 2 fitted in a groove part M of the clutch shaft K slides down on a taper part 8 formed in the release hub 4, and housed in a pin housing part 11 formed in the release hub 4 is cancel the clocking of the clutch shaft k with the groove part M, and the clutch shaft K can be moved in the axial direction.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a clutch for a power transmission device mounted on, for example, an industrial vehicle such as a forklift, and more specifically, the present invention relates to a clutch for a clutch shaft that transmits engine power to a transmission via a clutch disc. This relates to the stop structure.

0002

2. Description of the Related Art Conventionally, as shown in FIG. 3, a clutch shaft K of a friction clutch device mounted on, for example, a forklift is inserted through a front cover 20 supported on the inner wall of a clutch housing H. Same front cover 2
A lock ring insertion hole 22 through which a lock ring 21 for regulating the axial movement of the clutch shaft K is inserted is provided at the base end of the clutch shaft K. By inserting the lock ring 21 through the lock ring insertion hole 22 and engaging it in the groove M of the clutch shaft K, movement of the clutch K in the axial direction is restricted.

For example, when replacing a clutch disc (not shown) spline-coupled to the clutch shaft K, first the front cover 20 is replaced.
The lock ring 21 inserted into the lock ring insertion hole 22 and engaged with the groove M of the clutch shaft K is removed to release the engagement with the groove M. The lock ring 2
By disengaging the clutch shaft 1 from the groove M, the clutch shaft K can be moved in the axial direction, and the clutch shaft K can be pulled out from the spline-coupled clutch disc. After pulling out the clutch shaft K from the clutch disc, replace the worn clutch disc with a new clutch disc,
Insert the clutch shaft K into the new clutch disc, and then attach the lock ring 21 and clutch shaft K again.
The clutch disc replacement work is completed by engaging the groove portion M of the clutch disc.

0004

[Problems to be Solved by the Invention] However, when replacing the clutch disc, the removal work of the lock ring 21 that restricts the axial movement of the clutch shaft K requires manual or manual work into the narrow clutch housing H. Since it had to be removed using a special tool, there was a problem in that work efficiency deteriorated.

The present invention has been made to solve the above problem, and its purpose is to move the clutch shaft in the axial direction without removing the locking member that restricts the axial movement of the clutch shaft. The object of the present invention is to provide a locking structure for a clutch shaft that can release the restriction on movement of the clutch shaft.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a clutch shaft having a groove extending through a cylindrical support member, and a clutch shaft having a groove extending through the support member so as to face the groove of the clutch shaft. an accommodating hole transparently provided in a lower part of the accommodating hole; a locking member disposed in the accommodating hole that protrudes and engages with a groove of the clutch shaft to restrict axial movement of the clutch shaft; and the supporting member. a movable member disposed on an outer periphery so as to be movable in the axial direction; and a movable member formed on the movable member, and as the movable member moves in the axial direction, the locking member is inserted through a receiving hole provided in the support member. The gist of this invention is a clutch shaft locking structure consisting of a control surface that retracts and retracts from a groove in the clutch shaft.

[0007]

[Operation] Therefore, according to the present invention, when the movable member disposed on the outer periphery of the cylindrical support member passing through the clutch shaft having the groove is moved in one axial direction, the control formed on the movable member The locking member whose surface is engaged with the groove of the clutch shaft slides down. When the locking member slides down the control surface, the engagement with the groove of the clutch shaft is released, and the clutch shaft becomes able to move in the axial direction.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a clutch device for a forklift will be described below with reference to FIGS. 1 and 2. As shown in FIG. 1, a cylindrical front cover 1 serving as a support member is attached and fixed to the inner wall of a clutch housing H, and a clutch shaft K passes through the front cover 1. A housing hole 3 into which a locking pin 2 as a locking member is loosely fitted is transparently provided below the shaft of the front cover 1 . The locking pin 2 is loosely fitted into the accommodation hole 3.
By engaging with the groove M of the clutch shaft K, movement of the clutch shaft K in the axial direction is restricted. Furthermore, a fixed piece insertion hole 6 through which the fixed piece 5 is inserted is provided in the lower surface of the base end of the front cover 1 .

A release hub 4 as a movable member is movably disposed on the outer periphery of the shaft portion of the front cover 1, and the release hub 4 is formed into a substantially cylindrical shape. The fixed piece 5 having an outer diameter and an inner diameter smaller than that of the cylindrical portion 7 is formed to extend. Further, a tapered portion 8 serving as a control surface is formed between the fixing piece 5 and the main body cylindrical portion 7, and the diameter thereof becomes larger as it approaches the main body cylindrical portion 7. Further, a partition portion 9 is formed approximately at the center of the inner circumference of the release hub 4.

The fixing piece 5, the partition part 9, and the bearing part 10 formed at the base end of the release hub 4 support the release hub 4 so that it can move in the axial direction without shaking relative to the front cover 1. ing. Further, in the release hub 4, an inner circumferential recess formed by the tapered portion 8 and the partition portion 9 is used as a pin accommodating portion 11. The release hub 4 is movable in the axial direction by sliding the outer periphery of the front cover 1, so that the release hub 4 can be fixed in the engagement position shown in FIG. 1 and the non-engagement position shown in FIG. It has become. When the release hub 4 is in the engaged position, that is, the state shown in FIG.
This pushes up the locking pin 2 that is loosely fitted into the housing hole 3 of the front cover 1, and engages the locking pin 2 with the groove M of the clutch shaft K.

[0011] Furthermore, the release hub 4 is in a non-engaged position;
That is, when the release hub 4 is moved to the left from the state shown in FIG. 1 to the state shown in FIG. 8 and is accommodated in the pin accommodating portion 11, the engagement with the groove portion M of the clutch shaft K is released, and the clutch shaft K can be moved in the axial direction.

Further, when the locking pin 2 is housed in the pin accommodating portion 11, the upper end of the locking pin 2 is disengaged from the groove M of the clutch shaft K, but when the front cover 1 is housed, The engagement with the hole 3 is not released. Furthermore, when the locking pin 2 is moved from the non-engaged position to the engaged position, the locking pin 2 is moved by the tapered portion 8. Then, it engages with the groove M of the clutch shaft K, and the engaged state is maintained by the fixing piece 5.

[0013] The release hub 4 is moved to the right by depressing a clutch pedal (not shown) disposed in the forklift operator's cab to engage and disengage the clutch. Since the amount of movement is shorter than the length between the abutting portion of the fixing piece 5 and the locking pin 2 to the tip of the fixing piece 5, the locking pin 2 is prevented from falling off the fixing piece 5. Next, the operation when replacing the clutch disk D of the clutch device having the above-mentioned clutch shaft K locking structure will be explained.

First, the release hub 4 is placed in the engaged position (
1) to the disengaged position (the state shown in FIG. 2). That is, in order to release the engagement between the groove M of the clutch shaft K and the locking pin 2, the release hub 4 is moved toward the base end of the front cover 1, and the fixing piece 5 of the release hub 4 is inserted through the front cover 1. Insert it into the provided fixing piece insertion hole 6.

At this time, the locking pin 2, which was loosely fitted into the housing hole 3 of the front cover 1 and engaged with the groove M of the clutch shaft K, slides down the tapered part 8 of the release hub 4, and the clutch shaft The engagement of K with the groove M is released. Note that at this time, since the upper end of the locking pin 2 is engaged with the accommodation hole 3, the locking pin 2 will not fall off into the release hub 4.

When the engagement between the groove M of the clutch shaft K and the locking pin 2 is released, the clutch shaft K can be moved in the axial direction. That is, from the splined clutch disc to the clutch shaft K
It becomes possible to pull out. After pulling out the clutch shaft K from the clutch disc, the worn clutch disc is taken out from the clutch housing H and replaced with a new clutch disc.

Next, the clutch shaft K is inserted into the new clutch disc again, and the release hub 4 is moved to the right in FIG. 2. By moving the release hub 4 to the left, the locking pin 2, which is disengaged from the groove M of the clutch shaft K, slides up the tapered part 8 of the release hub 4, and the locking pin 2 slides up the taper part 8 of the release hub 4, and the locking pin 2 disengages from the groove M of the clutch shaft K.
It comes into contact with the inner periphery and is pushed upward by the inner periphery of the fixed piece 5.

That is, the state shown in FIG. 1 is reached, and the locking pin 2 is engaged with the groove M of the clutch shaft K, so that the clutch shaft K cannot be moved in the axial direction, making it difficult to replace the clutch disc. is completed. As detailed above, according to the clutch shaft locking structure of this embodiment,
When the clutch shaft K is moved in the axial direction when replacing the clutch disc, etc., the release hub 4, which is disposed on the outer periphery of the front cover 1 through which the clutch shaft K is inserted, is switched and moved from the engaged position to the disengaged position. Since this can be done by simply replacing the clutch disc, it is possible to reduce the work time required for replacing the clutch disc. Further, the release hub 4 fixes the locking pin 2 and the clutch shaft K.
Since the clutch functions to restrict the movement of the clutch in the axial direction and to engage and engage the clutch, the number of parts of the clutch device can be reduced.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be configured as follows, for example, without departing from the spirit of the invention. (1) In the above embodiment, the clutch device is installed on a forklift, but instead of the forklift, the clutch device may be installed on an automobile or various industrial vehicles.

(2) In the above embodiment, the locking pin 2 formed in a substantially cylindrical shape was used as the locking member to be engaged with the groove M of the clutch shaft K. Instead of the locking pin 2, the locking member may be composed of a ball or the like.

[0021]

[Effects of the Invention] As detailed above, according to the present invention,
This provides an excellent effect in that the restriction on the axial movement of the clutch shaft can be released without removing the engaging member that restricts the movement of the clutch shaft in the axial direction.

[Brief explanation of drawings]

FIG. 1 shows a clutch shaft locking structure according to an embodiment of the present invention, and is a partial side sectional view of a state in which a clutch shaft and a locking pin are engaged.

FIG. 2 is a partial side sectional view of the clutch shaft and the locking pin in a disengaged state.

FIG. 3 is a partial side sectional view showing a conventional clutch shaft locking structure in a state where the clutch shaft and the locking pin are engaged.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1...Front cover as a support member, 2...Lock pin as a locking member, 3...Accommodating hole, 4...Release hub as a moving member, 8...Tapered part as a control surface, K...Clutch shaft, M...Groove part .

Claims (1)

[Claims] 1. A clutch shaft having a groove extending through a cylindrical support member, a receiving hole transparently provided in a lower part of the supporting member so as to face the groove of the clutch shaft, and a receiving hole disposed in the receiving hole. a locking member that protrudes and engages with a groove of the clutch shaft to restrict axial movement of the clutch shaft; a moving member disposed on the outer periphery of the support member so as to be movable in the axial direction; A control surface formed on the movable member that causes the locking member to move in and out of the groove of the clutch shaft through a housing hole provided through the supporting member as the movable member moves in the axial direction. Stop structure.