JPH034828Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field The present invention is a replacement mechanism for a clutch disk, etc., which is provided so that the clutch disk can be replaced and removed by pulling out the main drive shaft from the clutch disk, and more specifically, a main drive shaft. In a replacement mechanism such as a clutch disk, which moves the shaft forward or backward by rotating a pulling tool such as a flat head screwdriver in a fore-and-aft direction, the pulling tool is supported as a rotational fulcrum. structure for,
That is, it relates to the fulcrum structure of the extraction tool.

2. Description of the Related 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.
Clutch discs and clutch covers (hereinafter referred to as "clutch discs, etc.") that have worn out in this way
) is to be replaced by pulling out the main drive shaft from the clutch disk. In other words, with the main drive shaft pulled out from the clutch disk retreating toward the transmission case, remove the clutch disk and clutch cover from the clutch case. A method is generally used in which the parts can be replaced and removed depending on the situation. In addition, in such a method of replacing the clutch disk, etc., a method for retracting the main drive shaft toward the transmission case side is to use, for example, a flathead screwdriver as a pulling tool, i.e., by providing a pulling tool on the main drive shaft side. A method is used in which the device is inserted into an annular groove and rotated in a fore-and-aft direction in a forcible manner to move it forward and backward.

However, when the extraction tool is rotated in a fore-and-aft direction like a lever, the extraction tool is usually rotated in the front-rear direction while being engaged with the intermediate part of the tool as a fulcrum. A method of engaging the extraction tool using the middle part as a fulcrum is to use the side wall of the clutch case as a fulcrum as shown in FIG. A method in which the clutch case is rotated in the front and rear directions in the engaged state, and a method in which an L-shaped hook is provided protruding from the side wall of the clutch case and the clutch case is rotated using the hook as a fulcrum, as shown in FIG. Actual public school 54-32103
No.) etc. have been proposed.

Problems that the invention aims to solve: However, in the method of rotating the clutch case using the side wall as a fulcrum as described above, it is not possible to obtain sufficient rotation operation space at the opening of the clutch case. In addition, there is a problem in that it cannot be rotated in a stable state, that is, it is prone to skidding. Furthermore, in the method of rotating the clutch case using a hook protruding from the side wall of the clutch case as a fulcrum, the fulcrum position can be lowered closer to the main drive shaft, making the rotation operation easier. The rotational operation range is inevitably large, that is, when the front and rear width of the clutch case is restricted and sufficient opening space cannot be obtained, such as in a forklift truck, the rotational operation must be performed smoothly. The problem is that it is impossible to do so, and it also tends to cause skidding, similar to the above.

This invention is an attempt to improve the above-mentioned problems, and in addition to being able to rotate the extraction tool in a stable state without causing side slipping, it also allows for easy rotation of the extraction tool with a small amount of force. The problem to be solved is to enable the extraction tool to be rotated and to be able to smoothly rotate the extraction tool when the opening space of the clutch case is limited. . The specific means and effects for solving the above problems are as follows.

Means for solving the problem A sloped surface is formed by notching the upper edge of the rear wall of the clutch case at an appropriate angle of inclination toward the inner wall surface, and the left and right sides of the sloped surface are cut out. A rising section is formed along the section.

Function: The extraction tool can be rotated on a sloped surface using the lower end as a fulcrum. That is, the distance between the pivot point of the extraction tool and the main drive shaft can be shortened.

The rising portion can restrict the displacement of the extraction tool in both the left and right width directions.

The extraction tool can be rotated without requiring a large space inside the clutch case.

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, in which numeral 1 indicates a clutch case, and numeral 2 indicates a case cover that covers the upper end opening of the clutch case 1. FIG. And the front wall portion 1A of the clutch case 1
(On the engine side) is the crankshaft (not shown).
The flywheel 4 is provided so that the rear end thereof faces, and the flywheel 4 is connected to the rear end. A front end portion of a main drive shaft 6 is supported in the center of the flywheel 4 via a pilot bearing 5 so as to be freely inserted and removed. The main drive shaft 6 is provided with a spline tooth portion 6' extending over substantially its entire length, and a clutch disk 8 can be freely inserted and removed from the front end portion of the main drive shaft 6 via the spline tooth portion 6'. It is mounted on a shaft. Also, a clutch cover 1 is attached to the flywheel 4.
6 is removably attached via a set bolt 9 so as to cover the clutch disk 8. The clutch cover 16 has a window hole 1 in its center corresponding to the main drive shaft 6.
6a is opened, and a release lever 18 is attached to the peripheral edge of the window hole 16a via a fulcrum pin 17.
They are pivoted at regular intervals along the periphery of a.
Further, 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 disc 8 against the flywheel 4. It is set up as shown in Further, one end of the inner diameter side of the release lever 18 is provided so as to face the inside of the clutch case 1 through the window hole 16a, and a bearing collar is connected to the one end of the inner diameter side of the release lever 18 via a release bearing 23 as will be described later. 22 so that it can come into contact with it.

On the other hand, a release hub bracket 7 is mounted on the rear wall portion 1B (transmission side) of the clutch case 1.
are fixed by screwing bolts. The release hub bracket 7 consists of a hub 7A section and a bracket 7B section that extends from the hub 7A section toward the inside of the clutch case 1.Although not shown in the diagram, the retainer rotates through a bearing in the hub 7A section. The rear end portion of the main drive shaft 6 is supported on the retainer through a spline tooth portion formed in the hollow portion of the retainer so as to be freely movable forward and backward. A plurality of annular grooves 15 are formed in a portion near the rear end of the main drive shaft 6 at regular intervals along the axial direction. Further, a bearing collar 22 is loosely fitted into the bracket 7A via a shift fork (not shown) so as to be slidable in the axial direction, and the inner diameter of the release lever 18 is fitted via the bearing collar 22 and a release bearing 23. It is provided so that one end of the side can be pressed toward the inside of the clutch cover 16 (towards the flywheel 4). A cutout window 14 for passing the extraction tool 3 of the main drive shaft 6 is opened in the bracket 7A.

Furthermore, a notch recess 10 is formed at the upper end edge of the rear wall portion 1B of the clutch case 1 in correspondence with the notch window 14 and for engaging the extraction tool 3 as a pivot point. . More specifically, the notch recess 10 is cut out from the upper edge of the rear wall portion 1B at an appropriate angle of inclination toward the inner wall surface, thereby providing a sloped surface 10a and forming a sloped surface 10a between the left and right sides of the sloped surface 10a. By providing vertical rising surfaces 10b, 10b along both sides, a U-shaped cross section is formed.

5 and 6 are drawings showing the second embodiment, in which the cutout recess 10 has a V-shaped cross section by providing sloped surfaces (rising surfaces 10b, 10b) on both sides of the sloped surface 10a. is formed.

FIG. 7 is the same diagram showing the third embodiment,
The sloped surface 10a of the notch recess 10 has a gently curved surface extending in the vertical direction, and is curved into an arc shape.

FIG. 8 is a drawing showing the fourth embodiment,
The sloped surface 10a of the cutout recess 10 is formed by having a pair of upper and lower sloped surfaces having different inclination angles and being bent into a dogleg shape.

In addition, the shape of the notch recess 10 can be selected from any shape other than the above-mentioned embodiments.

Next, the operation when replacing and attaching/detaching the clutch disc etc. is shown in Figures 1 to 4.
An example will be described. 3 and 4 are drawings showing the newly replaced clutch disc 8 being assembled into the clutch cover 1,
The work of assembling the clutch disk 8 is carried out by the following procedure.

First, insert the extraction tool 3 through the opening of the clutch case 1, and insert its tip into the annular groove 15 carved in the main drive shaft 6 through the cutout window 14, and the middle part into the cutout recess 10, respectively. (state shown in Figure 3). Then, by rotating the tip end in the annular groove 15 and the middle part in the notch recess 10 in the rearward direction, the extraction tool 3 is removed from the notch. The action of rotating around the recess 10 as a fulcrum, more specifically, both rising surfaces 10b, 10
b provides an effect of rotating about the lower end portion of the sloped surface 10a as a fulcrum in a state where sideways skidding in the left-right direction is restricted. By rotating the extraction tool 3 about the cutout recess 10 in this manner, an effect of moving the main drive shaft 6 forward by a small amount at its tip can be obtained. Then, by changing the engagement position of the extraction tool 3 with respect to the annular groove 15 to the subsequent annular groove 15 and repeating such operations one after another, the main drive shaft 6 is spline-fitted to the clutch disk 8, and the distal end thereof is spline-fitted. The effect of fitting the pilot bearing 5 into the pilot bearing 5 can be obtained (the fourth
condition shown in the figure).

In addition, when the extraction tool 3 is formed into a round bar shape by forming the notch recess 10 in a V-shaped cross section as in the second embodiment shown in FIGS. 5 and 6, the extraction tool 3 3 can be engaged in a stable state. By curving the sloped surface 10a into an arc shape as in the third embodiment shown in FIG. 7, or by forming the sloped surface 10a in a dogleg shape as in the fourth embodiment shown in FIG. By bending it into a shape, the pivot point can be moved.
This allows the rotation range of the extraction tool 3 to be increased. In particular, by forming the sloped surface 10a in an arcuate manner as in the third embodiment shown in FIG. 7, the fulcrum can be moved steplessly and smoothly.

Effects of the invention The invention is constructed as described above.
As mentioned above, by cutting out the upper edge of the rear wall of the clutch case and providing a notch recess for engagement with the middle part of the extraction tool as a rotational fulcrum, the extraction tool can be inserted into the notch. It was possible to rotate the lower end of the sloped surface formed at the location as a fulcrum, and as a result, the fulcrum of rotation of the extraction tool could be moved closer to the main drive shaft. In other words, the distance between the rotation fulcrum of the extraction tool and the main drive shaft can be shortened.
This made it possible to easily rotate the extraction tool with a small amount of force. Particularly when inserting the tip of the main drive shaft into the pilot bearing, a large amount of force is required, but by being able to rotate the extraction tool easily with a small force as described above, the pilot It is now possible to smoothly insert the tip of the main drive shaft into the bearing.

In addition, in the present invention, by providing rising surfaces along both sides of the slope surface as described above, when the extraction tool is rotated in a fore-and-aft direction in a forcible manner, it can be operated without causing sideslip. This has made it possible to significantly improve work efficiency and safety.

Furthermore, in the case of the present invention, by rotating the extraction tool using the notch formed in the rear wall as a fulcrum, the extraction tool can be rotated without requiring a large space inside the clutch case. It has now become possible to operate the robot. In other words, it has become possible to smoothly rotate the extraction tool in a clutch case such as a forklift truck where dimensions in the longitudinal direction are restricted.

[Brief explanation of drawings]

1 to 4 are drawings showing the first embodiment, in which FIG. 1 is a cross-sectional view of the clutch case, and FIG. 2 is an engagement recess for the extraction tool formed in the rear wall of the clutch case. FIGS. 3 and 4 are enlarged perspective views of parts, and sectional views of the clutch case in the operating state. 5 and 6 are drawings showing the second embodiment, in which FIG. 5 is a cross-sectional view of the engaging recess portion,
FIG. 6 is a sectional view taken along line A--A in FIG. 5.
FIG. 7 is a drawing showing the third embodiment, and is a sectional view of the engaging recess portion. FIG. 8 is a drawing showing the fourth embodiment, and is also a sectional view of the engaging recess portion. Further, FIGS. 9 and 10 are sectional views of a case showing a conventional structure. 1...Clutch case, 1A...Front wall, 1B
... Rear wall section, 2 ... Case cover, 3 ... Extraction tool, 4 ... Flywheel, 5 ... Pilot bearing, 6 ... Main drive shaft,
6'...Spline tooth part, 7...Relief hub bracket, 7A...Hub, 7B...Bracket,
8...Clutch disc, 9...Set bolt,
10...Engagement recess, 10a...Slope surface, 10b...
...Rising surface, 14...Cutout window, 15...
Annular groove, 16...Clutch cover, 16a...
Window hole, 17... Fulcrum pin, 18... Release lever, 19... Pressure plate, 20... Spring, 22... Bearing collar, 23... Release bearing.

Claims (1)

[Scope of utility model registration request] The main drive shaft is mounted horizontally within the clutch case so that it can freely move forward and backward toward the transmission case, and the clutch disc is mounted on a shaft at the tip of the drive shaft so that it can be inserted and removed freely, while the rear end of the main drive shaft In a replacement mechanism such as a clutch disk, which has an annular recessed groove for engaging a pull-out tool, the upper edge of the rear wall of the clutch case is oriented at an appropriate angle of inclination toward the inner wall surface. A mechanism for replacing a clutch disk, etc., which is formed by cutting out a sloped surface to form a sloped surface, and forming rising portions along both left and right sides of the sloped surface.