JP2012159120A - Assembling jig and assembling method for clutch mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To position a center hole of a clutch disk coaxially with a crankshaft.SOLUTION: A center hole 18a of a clutch disk 18 is positioned coaxially with a sleeve 26, in a state where a small-diameter part 26F of the sleeve 26 is inserted into both of the center holes 12a, 18a of a crankshaft 12 and the clutch disk 18, when performing the assembly by inserting the sleeve 26 into each of the center holes 12a, 18a of the crankshaft 12 and the clutch disk 18. At a distal end part proximity position of the small-diameter part 26F of the sleeve 26 facing the center hole 12a of the crankshaft 12, a movable chip 28 protrudes toward a radial direction outer side of the sleeve 26. The center hole 12a of the crankshaft 12 and the small-diameter part 26F of the sleeve 26 are positioned coaxially by causing the movable chip 28 to abut against a wall surface of the center hole 12a of the crankshaft 12.

Description

  The present invention relates to an assembling jig and an assembling method for a clutch mechanism.

  A clutch mechanism 10 as shown in FIG. 3 is widely used as a mechanism for transmitting the rotational force of the crankshaft 12 of the engine to the transmission. The clutch mechanism 10 is fixed to the crankshaft 12 and selectively press-fits a flywheel 14 that rotates integrally with the crankshaft 12 to transmit or cut power to the input shaft 16 of the transmission. And a clutch cover 20 that is fixed to the flywheel 14 and covers the clutch disk 18 (see, for example, Patent Document 1).

JP 2005-180563 A

  By the way, the centering shaft of the input shaft of the transmission is supported at the end of the crankshaft 12 of the clutch mechanism 10 shown in FIG. 3 when the engine is mounted on the rear wheel drive vehicle. For this purpose, a center hole 12a (FIG. 3 (a)) for inserting the bearing is formed. Further, a central hole 18a (FIG. 3C) for spline fitting with the input shaft 16 is formed in the rotation center portion of the clutch disk 18. 3 is an example applied to a front-wheel drive vehicle, a bearing is not inserted into the center hole 12a of the crankshaft 12, and the tip of the input shaft 16 of the transmission (transaxle) The shaft 12 is assembled so as not to contact the central hole 12a of the shaft 12.

  Thus, since the center hole 12a of the crankshaft 12 is formed in consideration of the insertion of the bearing, in the embodiment in which the bearing is not used as shown in FIG. 3, the size relationship between the diameters of the center holes 12a and 18a is The diameter D12 of the center hole 12a may be larger than the diameter D18 of the center hole 18a (D12> D18). On the other hand, the assembling operation of the input shaft 16 to the clutch mechanism 10 is usually in a temporarily assembled state of the clutch mechanism 10, that is, the clutch disk 18 is sandwiched between the flywheel 14 and the clutch cover 20, and the diaphragm 22 in the clutch cover. Thus, the clutch disk 18 is pressed against the flywheel 14.

For this reason, at the time of the assembly work, the crankshaft 12 and the flywheel 14 fixed to the crankshaft 12 and the center hole 18a of the clutch disc 18 need to be positioned concentrically. Because of the relationship between the diameters of the center holes 12a and 18a, the tip end portion of the input shaft 16 inserted into the center hole 18a of the clutch disk 18 having the smallest diameter is simply used as the center hole 12a of the crankshaft 12 having a larger diameter. Even if it is inserted, the gap between the tip of the input shaft 16 and the center hole 12a is not able to be centered, and accurate assembly of the input shaft 16 to the clutch mechanism 10 may be impossible. is there. When such a situation occurs, it is necessary to disassemble the temporarily assembled clutch mechanism 10 once, correct the misalignment between the crankshaft 12 and the center hole 18a of the clutch disk 18, and reassemble the clutch mechanism 10. It will cause a stop.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to selectively press-fit a flywheel that rotates integrally with a crankshaft to transmit or cut power to an input shaft of a transmission. It is possible to easily and accurately position the center hole of the clutch disk on the same axis as the crankshaft of a clutch mechanism including a clutch disk and a clutch cover fixed to the flywheel and covering the clutch disk. It is in.

(Aspect of the Invention)
The following aspects of the present invention exemplify the configuration of the present invention, and will be described separately for easy understanding of various configurations of the present invention. Each section does not limit the technical scope of the present invention, and some of the components of each section are replaced, deleted, or further while referring to the best mode for carrying out the invention. Those to which the above components are added can also be included in the technical scope of the present invention.

  (1) A clutch disk that selectively press-fits a flywheel that rotates integrally with the crankshaft to transmit or cut power to the input shaft of the transmission, and a clutch cover that is fixed to the flywheel and covers the clutch disk. A clutch mechanism assembling jig provided, which is formed at each rotation center portion of the crankshaft and the clutch disc, and has a minimum diameter among center holes located on the same core in a regular assembling state. A sleeve having an outer diameter that can be inserted while maintaining a concentric state with respect to the center hole, and in a state in which the sleeve is inserted into each center hole of the crankshaft and the clutch disc, Out of the sleeve in the radial direction from at least three circumferentially equidistant positions at the position facing the central hole of the largest diameter The assembly jig and a retractable movable tip toward (claim 1).

  The assembling jig for the clutch mechanism described in this section is a temporarily assembled state of the clutch mechanism, that is, the clutch disk is sandwiched between the flywheel and the clutch cover, and the clutch disk is pressed against the flywheel by the diaphragm in the clutch cover. When the state is constructed, the sleeve is inserted into the respective center holes of the crankshaft and the clutch disc for assembly. At this time, since the sleeve has an outer diameter that can be inserted while maintaining the concentric state with respect to the center hole of the minimum diameter, the sleeve of the minimum diameter is inserted in the center holes of the crankshaft and the clutch disc. The center hole and the sleeve can be positioned concentrically. Then, at the position facing the center hole of the maximum diameter among the center holes of the sleeve, the movable chip is projected outward from the sleeve in the radial direction from at least three locations at equal intervals in the circumferential direction. Is centered on the wall surface of the center hole of the maximum diameter, the center hole of the maximum diameter and the sleeve are positioned concentrically, and the center hole of the crankshaft and the clutch disk is centered.

(2) In the above paragraph (1), the movable tip is an assembly jig for a clutch mechanism provided at the tip of the sleeve or in the vicinity thereof (claim 2).
The assembling jig for the clutch mechanism described in this section is configured such that the movable tip provided at or near the tip of the sleeve is inserted into the sleeve having the smallest diameter of the clutch disk. By projecting outward in the radial direction, the movable tip is brought into contact with the wall surface of the crankshaft which is the center hole of the maximum diameter, and the center hole of the crankshaft and the sleeve are positioned concentrically. The center hole of the disc is centered.

(3) In the above (2), the movable tip has a rod that is inserted into the sleeve and is movable in the axial direction, and the movable tip receives the displacement in the axial direction of the rod and is moved from the outer wall of the sleeve. Is also held by the sleeve so as to be freely retractable between a retracted position positioned radially inward and a protruding position where the diameter of a circle connecting the protruding end portions of each movable tip reaches at least the inner diameter of the center hole of the crankshaft. An assembly jig for the clutch mechanism (claim 3).
The assembling jig for the clutch mechanism described in this section moves the rod inserted into the sleeve in the axial direction, so that the movable tip receives the displacement in the axial direction of the rod and protrudes from the retracted position. It moves in and out between positions.

(4) In the above (3), the rod projects from the rear end of the sleeve, and the projecting amount of the projecting portion is adjusted to adjust the projecting amount in the radial direction of the movable tip. Assembly tool (claim 4).
The assembling jig for the clutch mechanism described in this section adjusts the protruding amount of the movable tip in the radial direction by adjusting the protruding amount of the rod protruding from the rear end portion of the sleeve to the rear of the protruding portion. To do. When the movable tip is in the retracted position, the sleeve can be inserted into both center holes of the crankshaft and the clutch disc. When the movable tip is in the projecting position, the center hole of the crankshaft and the clutch disc is inserted. Centering is performed.

(5) In the above items (3) and (4), a pin protruding radially outward from the rod, and an L-shaped guide continuously extending in the axial direction and the circumferential direction of the sleeve for guiding the pin And when the rod is moved so that the movable tip is in the protruding position, the axial position of the pin and the portion extending in the circumferential direction of the guide groove coincide with each other. An assembling jig (claim 5).
In the assembling jig for the clutch mechanism described in this section, the pin protruding radially outward from the rod is guided in the axial direction and the circumferential direction of the sleeve by an L-shaped guide groove provided in the sleeve. Is. Moreover, when the rod is moved so that the movable tip is in the protruding position, the axial position of the pin and the portion extending in the circumferential direction of the guide groove coincide with each other, so that the pin extends in the circumferential direction of the guide groove. By engaging with the portion, the rod is fixed at a position in the axial direction where the movable tip becomes the protruding position.

(6) In the above items (1) to (5), a large-diameter portion having an outer diameter larger than the center hole of the clutch disk and capable of being inserted through the center hole of the clutch cover is provided on the rear end side of the sleeve. The sleeve is arranged such that the movable tip is positioned in the center hole of the crankshaft in a state where the tip surface of the large diameter portion is in contact with the end surface of the portion where the center hole of the clutch disk is formed. An assembly jig whose length is set (Claim 6).
The assembling jig for the clutch mechanism described in this section is configured so that the movable tip is cranked by the large diameter portion provided on the rear end side of the sleeve contacting the end surface of the portion where the center hole of the clutch disk is formed. Located in the center hole of the shaft, in this state, by projecting the movable tip toward the outside in the radial direction of the sleeve, the movable tip is brought into contact with the wall surface of the crankshaft which is the center hole of the maximum diameter, and the crankshaft The center hole and the sleeve are positioned concentrically, and the center hole of the crankshaft and the clutch disk is centered.

  (7) A flywheel fixed to a crankshaft, a clutch disk that selectively press-fits the flywheel and transmits or cuts power to an input shaft of a transmission, and a clutch disk fixed to the flywheel. A clutch mechanism assembling method comprising a clutch cover for covering, formed in each rotation center portion of the crankshaft and the clutch disk, out of each center hole located concentrically in a regular assembly state, A sleeve having an outer diameter that can be inserted while maintaining a concentric state with respect to the center hole having the smallest diameter is inserted into each center hole of the crankshaft and the clutch disk, and the center hole having the largest diameter among the center holes is inserted. The outer diameter of the sleeve is increased in accordance with the inner diameter of the center hole of the maximum diameter at the position facing the upper end, and the movable tip is moved to the outermost position. The crankshaft and the clutch disc are positioned concentrically with each other in contact with the wall surface of the center hole of the diameter, and further, the center hole of the clutch cover is inserted into the sleeve, and the clutch cover is moved to the flywheel. An assembly method in which the portion expanded to match the inner diameter of the center hole with the maximum diameter is returned to the state before diameter expansion, and the sleeve is pulled out from each center hole (Claim 7).

  The clutch mechanism assembly method described in this section is a temporarily assembled state of the clutch mechanism, that is, a state where the clutch disk is sandwiched between the flywheel and the clutch cover, and the clutch disk is pressed against the flywheel by the diaphragm in the clutch cover. Is constructed by inserting the sleeve through the center holes of the crankshaft and the clutch disc. At this time, since the sleeve has an outer diameter that can be inserted while maintaining a concentric state with respect to the center hole having the smallest diameter, the sleeve can be inserted into both center holes of the crankshaft and the clutch disc. Thus, the center hole of the smallest diameter and the sleeve can be positioned concentrically. Then, at the position facing the center hole of the maximum diameter among the center holes of the sleeve, the movable chip is projected outward from the sleeve in the radial direction from at least three locations at equal intervals in the circumferential direction. Is centered on the wall surface of the center hole of the maximum diameter, the center hole of the maximum diameter and the sleeve are positioned concentrically, and the center hole of the crankshaft and the clutch disk is centered.

  (8) An assembly method using the assembly jig according to any one of (1) to (6) in (7) above (claim 8).

  Since the present invention is configured as described above, the clutch disk that selectively press-fits to the flywheel that rotates integrally with the crankshaft and transmits or cuts power to the input shaft of the transmission, and the clutch fixed to the flywheel and the clutch The center hole of the clutch disk of the clutch mechanism including the clutch cover that covers the disk can be easily and accurately positioned on the same axis as the crankshaft.

1 shows a jig for assembling a clutch mechanism according to an embodiment of the present invention, in which (a) is a cross-sectional view when a movable chip is in a retracted position, and (b) is a sleeve large diameter portion of (a). (C) is a cross-sectional view taken along the line AA of (b), (d) is a cross-sectional view when the movable tip is in the protruding position, (e) is a side view of the sleeve large diameter portion of (d), (F) is BB sectional drawing of (d). It is sectional drawing of a clutch mechanism which shows a mode when performing centering of a crankshaft and a clutch disc by the jig | tool for assembly | attachment of the clutch mechanism shown by FIG. FIG. 2 shows an example of a clutch mechanism, in which (a) is an enlarged view of a portion of (b), (b) is a sectional view of a principal portion of the clutch mechanism, and (c) is an enlarged view of a portion of c.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Detailed description of the same or corresponding parts as those of the prior art will be omitted.
As shown in FIG. 2, the assembly jig 24 according to the embodiment of the present invention shown in FIG. 1 is formed at each rotation center portion of the crankshaft 12 and the clutch disk 18, and is in a normal assembly state. Among the center holes 12a, 18a located on the same center, the tip part of the center hole 12a, 18a is inserted into the center hole 18a of the clutch disk 18 which is the center hole of the smallest diameter, By expanding the diameter in accordance with the diameter of the center hole 12 a of the shaft 12, the center hole 18 a of the clutch disk 18 is positioned concentrically with the crankshaft 12.

As shown in FIG. 1A, the assembly jig 24 includes a sleeve 26 and a movable tip 28 that selectively protrudes from the vicinity of the distal end portion of the sleeve 26 to the radially outer side of the sleeve 26. Is. The sleeve 26 has a small diameter portion 26F having an outer diameter D0 through which the center hole 18a of the clutch disk 18 can be inserted on the front end side thereof, and a larger diameter than the center hole 18a of the clutch disk 18a on the rear end side. And a large-diameter portion 26R having an outer diameter D2 that can be inserted through the center hole (see FIG. 3B).

In addition, three movable tips 28 are provided so as to be able to protrude and retract toward the outer side in the radial direction of the small diameter portion 26F of the sleeve 26 from three locations at equal intervals in the circumferential direction near the tip of the sleeve 26. The movable tip 28 is a substantially wedge-shaped plate material in the illustrated example, and its projecting end portion is pivotally attached to the sleeve small diameter portion 26F by the pivot 30 so that the whole can be rotated in the radial direction of the sleeve small diameter portion 26F. Yes. Further, in the illustrated example, an elastic ring 32 such as an O-ring is wound around a recess 28a provided on each outer side of the three movable chips 28, and the three movable chips 28 are caused by the elastic force. The sleeve is always urged to the retracted position located radially inward of the outer wall of the sleeve small diameter portion 26F. Other means such as a coil spring or a leaf spring can be appropriately employed as the means for biasing the movable tip 28 toward the storage position.

The assembly jig 24 has a rod 34 that is inserted into the sleeve 26 and is movable in the axial direction. The rod 34 has a conical pointed tip 34a that is in contact with each inner side of the movable tip 28. When the rod 34 moves forward, the movable tip 28 is moved radially outward by the tip 34a. As shown in FIG. 1 (d), the diameter D1 of the circle connecting the projecting ends of the three movable tips 28 from the retracted position of the movable tip 28 shown in FIG. It is possible to move in and out between the protruding position reaching the inner diameter of the 12 center holes 12a (see FIG. 2). Further, the rod 34 protrudes from the rear end portion of the sleeve large-diameter portion 26R, and the protruding amount in the radial direction of the movable tip 28 is adjusted by adjusting the protruding amount of the protruding portion 34b to the rear. . Reference numeral 36 in the drawing is a grip for an operator to grip when the rod 34 is moved with respect to the sleeve 26.

  In the illustrated example, the sleeve 26 is integrally formed by fitting the small diameter portion 26F into the inner cylindrical portion 38 of the large diameter portion 26R. A circular flange 34c having a diameter slidable in the inner cylindrical portion 38 of the large diameter portion 26R is formed at an intermediate portion of the rod 34. The flange 34c and the small diameter portion 26F with respect to the large diameter portion 26R are formed. The rod 34 is always urged rearward by the coil spring 42 disposed between the annular stopper 40 that performs axial positioning, and the movable tip 28 is always retracted to the retracted position. Although not shown for convenience, the large-diameter portion 26R of the sleeve 26 has a structure that can be appropriately disassembled in order to install the stopper 40 on the inner cylinder portion 38.

Further, as shown in FIGS. 1B and 1C, a pin 44 protruding outward in the radial direction is provided at a portion of the rod 34 positioned in the large diameter portion 26R, and the large diameter portion of the sleeve 26 is provided. An L-shaped guide groove 46 that continuously extends in the axial direction and the circumferential direction of the sleeve 26 for guiding the pin 44 is formed in 26R. The pin 44 is received in the guide groove 46 so as not to protrude from the outer peripheral wall of the large-diameter portion 26R of the sleeve 26. A portion 46a of the guide groove 46 extending in the axial direction of the sleeve 26 is provided with a length that covers the range of movement of the rod 34 in the axial direction. This is the rear end position of the movable range of the rod 34.
On the other hand, the portion 46b extending in the circumferential direction of the guide groove 46 corresponds to the position of the pin 44 and the portion extending in the circumferential direction of the guide groove 46 when the rod 34 is moved forward so that the movable tip 28 is in the protruding position. It is comprised so that a position may correspond. Then, by rotating the rod 34 in the circumferential direction with respect to the sleeve 26, the pin and 44 engage with a portion 46 b extending in the circumferential direction of the guide groove 46, and the axial position with respect to the sleeve 26 is fixed.

Further, the protrusion length L of the small diameter portion 26F of the sleeve 26 from the front end surface of the large diameter portion 26R is such that the front end surface 26a of the large diameter portion 26R is the center hole 18a of the clutch disc 18 as shown in FIG. The movable tip 28 is set so as to be positioned in the center hole 12a of the crankshaft 12 in a state in which it is in contact with the end face 18b of the portion (center boss) formed with.

The assembly procedure of the clutch mechanism 10 using the assembly jig 24 is as follows. First, the sleeve 26 in which the movable tip 28 is in the retracted position is inserted into the center holes 12a and 18a of the crankshaft 12 and the clutch disc 18, and the center hole 18a of the clutch disc 18 and the small diameter portion 26F of the sleeve 26 are concentric. Hold. Then, the rod 34 is advanced in the axial direction, and the movable tip 28 is projected to the projecting position, whereby the movable tip 28 is brought into contact with the wall surface of the center hole 12a of the crankshaft 12, and the crankshaft 12 and the clutch disc 18 are moved. Position on the same core. Further, as shown in FIG. 3B, the center hole of the clutch cover 20 is inserted from the rear of the sleeve 26, and the clutch cover 20 is fixed to the flywheel 18 with bolts. Thereafter, the rod 34 is moved back in the axial direction, the movable tip 28 is returned from the protruding position to the retracted position, and the sleeve 26 is removed from the center hole 12a of the crankshaft 12, the center hole of the clutch disc 18, and the center hole of the clutch cover 20. By pulling out, the clutch mechanism 10 can be temporarily assembled.
The above assembly work can be performed manually by the operator holding the assembly jig 24. However, if necessary, the assembly jig 24 can be incorporated into a dedicated machine or robot and automated. It is also possible to do.

Now, according to the embodiment of the present invention configured as described above, the following operational effects can be obtained.
First, the assembling jig 24 of the clutch mechanism according to the embodiment of the present invention is a temporarily assembled state of the clutch mechanism 10 shown in FIG. 2, that is, the flywheel 14 and the clutch cover 20 (see FIG. 3B). When the clutch disk 18 is clamped and the clutch disk 18 is pressed against the flywheel 14 by the diaphragm 22 (see FIG. 3B) in the clutch cover 20, The clutch disk 18 is inserted through the center holes 12a and 18a for assembly. At this time, the small diameter portion 26F of the sleeve 26 has an outer diameter that can be inserted while maintaining the concentric state with respect to the center hole 18a of the minimum diameter of the clutch disk 18. Therefore, the small diameter portion 26F of the sleeve 26 is connected to the crankshaft. 12 and the center holes 12a, 18a of the clutch disk 18 can be inserted, and in this inserted state, the center hole 18a of the clutch disk 18 and the sleeve 26 can be positioned concentrically. Then, the movable tip 28 is inserted into the sleeve 26 from at least three circumferentially spaced positions in the vicinity of the distal end portion of the small diameter portion 26F of the sleeve 26 facing the center hole 12a having the maximum diameter of the crankshaft 12 of the sleeve 26. Projecting outward in the radial direction (expanding or partially expanding the outer diameter of the sleeve 26), the movable tip 28 is brought into contact with the wall surface of the center hole 12a of the crankshaft 12, and the crank The center hole 12a of the shaft 12 and the small diameter portion 26F of the sleeve 26 are positioned concentrically so that the center hole 18a of the crankshaft 12 and the clutch disk 18 can be centered.

At this time, by moving the rod 34 inserted into the sleeve 26 in the axial direction, the movable tip 28 receives the displacement in the axial direction of the rod 34 and moves between the retracted position and the protruding position. Is possible.
Further, the amount of protrusion of the movable tip 28 in the radial direction is adjusted by adjusting the amount of protrusion of the rod 34 protruding from the rear end portion of the large-diameter portion 26R of the sleeve 26 to the rear of the protruding portion 34b. Is in the retracted position (FIG. 1 (a)), the sleeve 26 can be inserted into the center holes 12a, 18a of the crankshaft 12 and the clutch disc 18 through the small diameter portion 26F of the sleeve 26 and is movable. When the tip 28 is in the protruding position (FIG. 1C), the crankshaft 12 and the center hole 18a of the clutch disk 18 can be centered.

Further, a pin 44 protruding radially outward from the rod 34 is guided in the axial direction and the circumferential direction of the sleeve 26 by an L-shaped guide groove 46 provided in the large-diameter portion 26R of the sleeve 26. . Moreover, when the rod 34 is moved so that the movable tip 28 is in the protruding position, the position of the pin 44 and the position of the portion 46b extending in the circumferential direction of the guide groove 46 coincide with each other in the axial direction. The rod 34 can be fixed at the axial position where the movable tip 28 is in the protruding position by the engagement between the portion 44b extending in the circumferential direction of the guide groove 46, and the operation is facilitated.
As shown in FIG. 2, the large-diameter portion 26R provided on the rear end side of the sleeve 26 contacts the end surface of the portion where the center hole 18a of the clutch disk 18 is formed, so that the movable tip 28 is The movable tip 28 is located in the center hole 12a of the crankshaft 12, and in this state, the movable tip 28 protrudes outward in the radial direction of the sleeve 26, so that the movable tip 28 comes into contact with the wall surface of the center hole 12a of the crankshaft 12. Thus, the center hole 12a of the crankshaft 12 and the sleeve 26 are positioned concentrically, and the center hole 18a of the crankshaft 12 and the clutch disk 18 can be centered.

In the embodiment of the present invention, as described above, the movable tip 28 is disposed near the tip of the small-diameter portion 26F by inserting the small-diameter portion 26F of the sleeve 26 into the center hole 18a of the minimum diameter of the clutch disk 18. By projecting the sleeve 26 outward in the radial direction of the sleeve 26, the center hole 12a of the crankshaft 12 with the largest diameter and the sleeve 26 are positioned concentrically, and the centering of the center hole 18a of the crankshaft 12 and the clutch disc 18 is centered. This is an example of the case where the operation is performed. However, even when the size relationship between the center holes is different, the movable tip 28 is provided at a position facing the hole of the maximum diameter, and the center hole of the minimum diameter and the sleeve 26 are concentric with the sleeve 26 inserted. It is possible to position the center hole of the maximum diameter and the sleeve concentrically by positioning upward and projecting the movable tip 26 outward in the radial direction of the sleeve 26.
Also, the moving mechanism of the movable chip 26 is an example, and it is also a matter of adopting another mechanism that can freely move between the retracted position and the protruding position. Furthermore, it will be understood that the movable chip 26 may be configured to have a larger number as long as the centering function can be exhibited.

10: Clutch mechanism, 12: Crankshaft, 12a, 18a: Center hole, 14: Flywheel, 16: Input shaft, 18: Clutch disc, 20: Clutch cover, 24: Assembly jig, 26: Sleeve, 26F: Small diameter part, 26R: Large diameter part, 28: Movable tip, 34: Rod, 44: Pin, 46a: Minute part extending in the axial direction, 46b: Part extending in the circumferential direction

Claims (8)

A clutch mechanism comprising: a clutch disk that selectively press-fits a flywheel that rotates integrally with a crankshaft to transmit or cut power to an input shaft of a transmission; and a clutch cover that is fixed to the flywheel and covers the clutch disk The assembly jig of
It is formed at each rotation center of the crankshaft and the clutch disc, and can be inserted while maintaining the concentric state with respect to the center hole of the smallest diameter among the central holes located on the same core in a properly assembled state. A sleeve having a large outer diameter, and in a state where the sleeve is inserted through the respective center holes of the crankshaft and the clutch disc, the sleeve has a circumferential position at a position facing the center hole having the largest diameter among the center holes. An assembling jig comprising: a movable tip that can be projected and retracted from at least three locations at equal intervals in the direction toward the radially outer side of the sleeve. 2. The assembly jig according to claim 1, wherein the movable tip is provided at a distal end portion of the sleeve or in the vicinity thereof. A rod inserted into the sleeve and movable in the axial direction; and the movable tip receives a displacement in the axial direction of the rod, and is in a storage position positioned radially inward from the outer wall of the sleeve; The diameter of a circle connecting the protruding end portions of each movable tip is held by the sleeve so as to be able to protrude and retract at least between the protruding position reaching the inner diameter of the center hole of the crankshaft. The assembling jig described. The rod protrudes from the rear end portion of the sleeve, and the protruding amount of the movable tip is adjustable by adjusting the protruding amount of the protruding portion. Assembly jig. A pin projecting radially outward from the rod; and an L-shaped guide groove extending continuously in an axial direction and a circumferential direction of the sleeve for guiding the pin; The axial position of the position of the pin and the position of the portion extending in the circumferential direction of the guide groove coincide with each other when the rod is moved so as to match. The assembling jig described. On the rear end side of the sleeve, a large-diameter portion having an outer diameter larger than the center hole of the clutch disk and capable of being inserted through the center hole of the clutch cover is provided.
The length of the sleeve is such that the movable tip is positioned within the center hole of the crankshaft with the tip surface of the large diameter portion in contact with the end surface of the portion where the center hole of the clutch disk is formed. The assembly jig according to any one of claims 2 to 5, wherein the assembly jig is set. A flywheel fixed to the crankshaft, a clutch disk that selectively press-fits the flywheel and transmits or cuts power to the input shaft of the transmission, and a clutch cover that is fixed to the flywheel and covers the clutch disk An assembly method of a clutch mechanism comprising:
It is formed at each rotation center of the crankshaft and the clutch disc, and can be inserted while maintaining the concentric state with respect to the center hole of the smallest diameter among the central holes located on the same core in a properly assembled state. A sleeve having a large outer diameter is inserted through each center hole of the crankshaft and the clutch disc, and the outer diameter of the sleeve is set to the maximum diameter at a position facing the center hole of the maximum diameter among the center holes. The movable tip is brought into contact with the wall surface of the center hole having the maximum diameter, the crankshaft and the clutch disc are positioned on the same core, and the clutch cover is further expanded. The center hole is inserted into the sleeve, the clutch cover is fixed to the flywheel, and the portion expanded in accordance with the inner diameter of the maximum diameter central hole is returned to the state before the expansion, Serial assembling method characterized by withdrawing the sleeve from the center hole. The assembling method according to any one of claims 1 to 6, wherein the assembling jig according to any one of claims 1 to 6 is used.

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