JPS648222B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a flywheel that is used by being attached to a torque converter mounting drive plate during a torque converter car engine test.

(Prior Art) The drive plate for mounting the torque converter of the torque converter car is made of a thin plate, so when attaching the drive plate to the flywheel on the front side, conventionally, bolt through holes are provided in the drive plate and the A bolt inserted through a bolt through hole was screwed into a screw hole provided on the flywheel side.

(Problem to be Solved by the Invention) Therefore, when attaching or detaching the flywheel, it is necessary to operate the bolts from the back side of the drive plate rather than from the front side of the flywheel. As shown in , there is an end plate 1 on the back side of the drive plate 2.
7 are arranged close to each other, the end plate 17 is rotated while the drive plate 2 is rotated.
Each bolt position must correspond in turn to one opening for bolt attachment/detachment operation provided in the end plate 17, and the bolt attachment/detachment operation must be performed from the back side of the end plate 17 through the opening for bolt attachment/detachment operation;
There was a drawback that attaching and detaching the flywheel 1 to and from the drive plate 2 required a great deal of effort and time.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, the present invention has a structure in which a plurality of through holes in the circumferential direction are provided on the back side of the flywheel in a drive plate for attaching a torque converter. A positioning protrusion that fits into each of the plurality of through-holes, and a locking piece that can be fitted into and removed from the remaining through-holes are provided, and each of the locking pieces only rotates at an eccentric position with respect to the through-hole. a female threaded body that is threadably fitted onto a screw shaft supported by the flywheel and that can be rotated only within a range of approximately 180 degrees by a stopper on the flywheel side, and in a position that can be extracted from the through hole; We propose a flywheel for torque converter vehicle engine testing, which is configured to be able to switch to a posture capable of engaging with the back of the periphery of the through hole, and in which the screw shaft is provided with a rotary operation section that can be operated from the front side of the flywheel. It is something to do.

(Operation of the invention) When attaching the flywheel to the drive plate, first rotate the screw shaft in the unscrewing direction, move the locking piece together with the female screw body in the direction of pushing out the flywheel a little, and switch to the extraction position. I'll keep it. In this state, the flywheel is brought into contact with the front surface of the drive plate so that each of the positioning protrusions fits into the plurality of through-holes and the locking pieces penetrate through the remaining plurality of through-holes.

Next, when each screw shaft is rotated from the surface side of the flywheel in the screwing direction using the rotary operation unit, the locking piece together with the female screw body is switched from the extracted position to the engaged position due to the first 180 degree rotation. The retaining piece enters into the peripheral part side of the through hole of the drive plate. When the screw shaft is further rotated in the screwing direction, the female screw body, which cannot be rotated any further, is drawn toward the flywheel, and the locking piece presses and fixes the drive plate to the flywheel around the through hole.

The rotational force of the flywheel during an engine test is transmitted to the drive plate via the positioning protrusion and the through hole that fits therein, and the rotational force does not act on the locking piece or the female threaded body.

When removing the flywheel after the engine test, use the rotary operation unit to rotate the screw shaft from the front side of the flywheel in the unscrewing direction. As a result, the female threaded body is pushed out from the flywheel together with the locking piece, and when the frictional force between the drive plate and the locking piece weakens or becomes zero, the female threaded body rotates 180 degrees together with the screw shaft, and the drive It switches to a position where it can be pulled out from the through hole on the plate side. Therefore, separate the flywheel from the drive plate,
The flywheel can be removed from the drive plate by allowing the positioning protrusion and the locking piece to escape from the through hole.

The above-mentioned mounting means consisting of the screw shaft, female screw body, stopper, locking piece, and through hole is similar in principle to the mounting means disclosed in, for example, Japanese Utility Model Application Publication No. 53-64963. However, in this type of attachment means that is conventionally known, a stopper that restricts the rotation range of the locking piece is provided on the side of the attached member (in the present invention, the drive plate is the attached member), In the present invention, by providing all the components including the stoppers other than the through holes on the flywheel side, it can be practically used as a means for attaching the flywheel to the drive plate for attaching the torque converter to which foreign objects cannot be attached. Summer.

(Embodiment) An embodiment of the present invention will be described below based on the attached illustrative drawings. In FIGS. 1 and 2, 1 is a flywheel, 2 is an end portion of a crankshaft 3 in an engine of a torque converter vehicle This is the drive plate for attaching the torque converter. This drive plate 2 is provided with a plurality of perfect circular through holes 4, six in this illustrated example, at equal intervals in the circumferential direction. A disc-shaped positioning projection 5 that can fit into the hole 4 is attached to the back surface of the flywheel 1 with a bolt 6. 7 is the other 3
At a position facing each of the through holes 4 and at a position eccentric with respect to the through holes 4, a female threaded body 8 is screwed into the screw shaft, which is rotatably supported by the flywheel 1; At the tip of the shaft portion 7a protruding from the front side of the flywheel 1, a rotation operation portion 9 in the shape of a square shaft is formed. The female threaded body 8
As shown in FIGS. 3 to 6, a protrusion 10 protrudes from the female threaded body 8, and a retaining plate 12 protrudes from the screw shaft 7 attached to the flywheel 1 side with a bolt 11. The stopper 13 allows rotation only within a range of 180 degrees;
When at one end of the 180 degree rotation range,
As shown in FIGS. 3 and 4, when the position is in the non-working position A where it can be pulled out from the through hole 4, and when it is at the other rotation limit, the area around the through hole 4 as shown in FIGS. 5 and 6. The locking piece 14, which is in the engagement posture B that can be engaged with the back part, that is, the drive plate 2, is attached to the female threaded body 8.
It is connected horizontally from the tip.

To explain how to use it, see Figures 3 and 4.
As shown by the upper two locking pieces 14 in FIG. 10 and the stopper 13 are in contact with each other, the screw shaft 7 is further rotated in the same direction, and the female screw body 8 is moved outward until it comes into contact with the tip flange 7b of the screw shaft 7. In this state, as shown in FIG. 2, the flywheel 1 is moved so that each protrusion 5 fits into the through hole 4 and each locking piece 14 protrudes from the other through hole 4 toward the back side of the drive plate 2. ,
It is brought into contact with the drive plate 2. Thereafter, by rotating each screw shaft 7 clockwise as shown in FIGS. 5 and 6, the female screw body 8 is rotated in the same direction until the protrusion 10 abuts the other end of the stopper 13.
Rotate 180 degrees. As a result, the locking piece 14 assumes the engagement position B, with its tip protruding outward from the periphery of the through hole 4 and facing the back surface of the drive plate 2. When the screw shaft 7 is further rotated in the same direction, the female threaded body 8 is drawn as shown by the arrow in FIG. 5, and the locking piece 14 comes into pressure contact with the drive plate 2 as shown in FIG. 1 is fixed to the drive plate 2.

During an engine test, the clutch plate of the starter comes into pressure contact with the flywheel 1, and the starting torque of the starter is transmitted from the flywheel 1 to the drive plate 2 via the projection 5, and the engine is started. Further, a clutch can also be attached to the flywheel 1.

After completing the engine test, when removing the flywheel 1, rotate each screw shaft 7 counterclockwise.
The female screw body 8 is advanced outward and rotated in the same direction, and the locking piece 14 is returned to the non-operating position A as shown in FIGS. 3 and 4, and comes into contact with the helical shaft tip flange 7b. The flywheel 1 can be separated from the drive plate 2 by moving backward to the point where the flywheel 1 is moved backward.

Incidentally, as the rotation operating portion 9 of the screw shaft 7, a square hole 15 may be provided at the end of the screw shaft 7, as shown in FIG. In this case, it is not necessary to provide the protruding shaft portion 7a on the screw shaft 7. Further, as shown in FIG. 7, a compression coil spring 16 is provided to press and bias the female threaded body 8 outward (towards the flange 7b), and the female threaded body 8 and the screw shaft 7
It is also possible to configure the system so that collaboration with

(Effects of the Invention) As described above, according to the flywheel of the present invention, when attaching and detaching from the drive plate for attaching the torque converter, it is only necessary to rotate the rotation operating portion of the screw shaft on the front side of the flywheel.
The work of attaching and detaching the flywheel can be done extremely simply and efficiently. Moreover, the rotational force of the flywheel during engine testing can be reliably transmitted to the drive plate via the positioning protrusion provided on the flywheel and the through hole that fits into the protrusion, thereby fixing the flywheel. It is safe because no excessive force is applied to the locking piece, etc.

[Brief explanation of the drawing]

Figure 1 is a rear view of the flywheel, and Figure 2 is the flywheel in use.
3 and 5 are longitudinal sectional side views of the main parts showing the flywheel installation method, and FIGS. 4 and 6 show the posture of the locking piece in the state shown in FIGS. 3 and 5. FIG. 7 is a longitudinal sectional side view of main parts showing a modification. 1...Flywheel, 2...Drive plate for mounting torque converter, 4...Through hole, 5...Protrusion,
7... Screw shaft, 8... Female screw body, 9... Rotating operation section, 10... Protrusion, 13... Stopper, 14...
...Latching piece.

Claims (1)

[Claims] 1 On the back side of the flywheel 1, there are positioning protrusions 5 that fit into a plurality of through holes 4 in the circumferential direction provided in the drive plate 2 for attaching the torque converter, and the remaining through holes 4. A locking piece 14 that can be fitted and removed freely is provided, and each locking piece 14
is a stopper 13 on the flywheel 1 side that is screwed into the screw shaft 7 supported by the flywheel 1 so as to be rotatable only at an eccentric position with respect to the through hole 4;
It protrudes from a female threaded body 8 which can be rotated only within a range of about 180 degrees, and is configured to be switchable between a posture in which it can be pulled out from the through hole 4 and a posture in which it can be engaged with the back of the periphery of the through hole 4. , the screw shaft 7 is provided with a rotary operation section 9 that can be operated from the front side of the flywheel 1.
A flywheel for torque converter car engine testing.