JPS5954824A - Clutch release bearing device - Google Patents

Abstract

PURPOSE:To keep off the rotation and slipoff of an inner race for a fitting part of a clutch release bearing, by making an elastic body cut into a streaky groove formed on the outer circumferential surface of a bearing hub so as to cause the elastic body to be elastically deformed. CONSTITUTION:A band 30 is fitted in the outside of a tip part 11a on a bearing setting part 11 of a synthetic resin-make bering hub 10 and then a clutch release bearing 20 is fitted therein. Unter this condition, the band 30 is compressed and the inner circumferential part becomes cut in grooves of a knurling indent 11c at the tip part 11a by means of being elastically deformed. Therefore, an effective prevention against rotation and slipoff of an inner race 21 comes to fruition owing to the friction force produced between the band 30 and the inner race 21 as well as the bearing setting part, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a clutch release bearing device, and more particularly to a clutch release bearing device equipped with a synthetic resin bearing hub and mainly applied to automobile clutches. The pair cylinder hub is generally made of iron, and the attachment of the clutch release bearing to the pair cylinder hub is accomplished by press-fitting the inner race of the clutch release bearing into the pener ring mounting portion of the bell ring hub.

On the other hand, in order to meet the demand for weight reduction of automatic distortion parts, it is proposed to make the pair redder honeyb made of synthetic resin; a! 'l.

However, since the thermal expansion coefficient of the synthetic resin is significantly different from that of steel, which is the material of the clutch release bearing, the installation method described in ni1 cannot be used, and the mounting method described in ni1 cannot be used. Nizubearinge's inner sheath was attached to the Benarisig mounting part of the synthetic resin bearing hub using a chemical agent. However, the mounting method is time-consuming because it requires degreasing of the adhesive, and it is difficult to remove after installation.) - When the notch release bearing is damaged, the bell ring hub is also replaced. It is uneconomical to do so.

Based on these points, the applicant et al. proposed that the outer periphery of the clutch release bearing fitting part of the synthetic resin bearing hub and the inner race I of the clutch release bearing.
I? proposed a device in which an elastic body was inserted in a compressed state between the It is now possible to provide a device that does not cause any adverse effects when installed on a vehicle.

Therefore, with the premise of commercialization, we will mass produce synthetic resin perforation ring hubs and elastic bodies, and have been mass producing and selling them as before.
It was assembled with a 3T Clara'f release bearing and mounted on a vehicle, and was subjected to 7 actual driving tests, which also served as a durability test. Among them, the applicant has synthesized position I 11t'7
It was found that the fit between the bearing hub and the clutch release bearing made by the company was easily loosened and could easily come loose.

Therefore, when we increased the compression state of the elastic body between the synthetic resin bearing 7 and the Kura Noti Relie spare ring, we were able to eliminate the slack mentioned in 1. In some cases, the elastic body was compressed beyond the limit of its compressibility, leading to damage.

This is due to the difference in dimensional accuracy during manufacturing between the inner diameter of the inner race of the clutch release bearing, the outer diameter of the fitting part of the synthetic resin bearing hub, and the elastic body. I understand that In other words, the clutch release bearing is manufactured with ultra-precision, and the dimensional tolerance of the inner diameter of the inner race is also ultra-precision, and the dimensional tolerance width is small (0,0010 mm), but the bearing hub is made of synthetic resin. Since it is molded, there is a limit to increasing the dimensional accuracy, and the dimensional tolerance width of the outer diameter of the silk outside the fitting part is large (0.15 mm). Furthermore, since the elastic body is molded from a synthetic film, there is a limit to increasing the dimensional accuracy, and the dimensional tolerance range is large (0.20 mm).

The present invention was made in view of the above points, and in order to reduce the load caused by compression of the elastic body due to variations in each dimension (the dimensions of the manufactured product are uniformly distributed within a certain range), The body landed 11. A large number of 1ITh holes are formed on the outer periphery of the fitting part of the synthetic resin bellow ring, and an elastic body is elastically deformed and bit into the 41N'-1fJt groove. By invention 1゛I,
The clutch release bearing is fitted on the outside of the clutch release bearing fitting part of the synthetic resin bear cylinder hub, and an elastic body is placed between the inner periphery of the inner race of this clutch release bearing and the outer center of the clutch release bear cylinder fitting part. At the same time as interposing the elastic body in a compressed state, a large number of i+Thi yellows are formed on the outer periphery of the clutch release bearing fitting part where this elastic body hits 20, so that the elastic body elastically deforms and bites into the groove in this (+). Due to this, the compression ratio of the elastic body exceeds the limit and the elastic body is damaged due to variations in the dimensions of the low joint part of the synthetic resin bearing hub, which has particularly large dimensional tolerances, and the dimensions of the elastic body. In addition, the frictional resistance is increased by the elastic body biting into the sleeve groove, and the rotation and removal of the inner race relative to the clutch release bearing fitting part can be more firmly controlled. 〇The present invention will be described below with reference to the drawings.

In the 1st FA and Fig. 2, 10 is the bearing hub, and 20 is the clutch release bearing h7+. The bearing hub IO is made of synthetic resin, preferably thermosetting synthetic resin. The bearing hub 10 is slidably supported by a bear cylinder hub retainer (not shown), and has a bearing cylinder mounting portion 11 and a protrusion 12 that engages with a clutch release fork (not shown).

The thickness of the bearing mounting portion 11 is set so that the clutch release bearing 20 is fitted to the outside of the cylinder mounting portion 11, and if the clutch release bearing 20 is fitted to the outer side of the cylinder mounting portion 11, the inner race 21 is a tight fit or a tight fit. . The tip end 11a of the bearing mounting portion 11 has a smaller diameter than the root portion 11b, and the tip g (on the outside of the Slla, there is a band as shown in Fig. 8 made of elastic synthetic resin). 80 is fitted r Noah 1. The thickness Bt of this band 80 is the outer side of the band 807.ia 1, > i-jly f''
tfls 9c end a00. . Outer circumference: inner lace 2
The compression is set to '2xrt' so that the compression is 3rL between one cycle of the data. Band 80 has inner lace 21 o) ((z
In order to prevent the band 80 from moving during operation, it has a flange portion 81 that engages with the tip end surface of the bearing mounting section 11. - On the outer periphery of the tip 11a of the bearing hub 11, as shown in the fourth figure, knurls 11C are formed and a large number of one-width grooves are formed. This knurling 11C is, for example, JIS
B 0951 (1962), it may be formed by adding appropriate specifications from the standard Hn flat, and instead of knurling, JIS Bl (302 (1962))
It goes without saying that something like the serrations defined by n may also be used.

The main dimensions of the device that can be put to practical use are as follows: the outer diameter of the inner race 21 of the clutch release bearing 20, the base portion 11b of the mounting portion 11, is 1]l, and the outer diameter of the tip and end portion 11a is D27. , the inner diameter of the bullet body 80 is 1) 3゜thickness is t, 2
If the setting is 2"7'l, as shown in Table 1, < 1Jj-
0″su°,,′.

In the above yOki configuration, Kura 1 Nochi Release Bear'J
>If'2.0@Hair'J''> ,,/,F1 'Q, Positive, :, :Q' attached le&:X kl Destination:.

Lower the tip 111 of the bearing mounting part 11 of the bearing hub 10 to the outside of the handle 80, and then press the lever 20. In this state, the band 3'0 is compressed 271.J. The circumferential part has a tip H11
a ty30 - It is elastically deformed and bites into 114 of the let 11c. And band 80 and inner lace 21. M+'tH of the song with each of the bell ring attachment parts 11
The rotation of the inner race 21 and the stop of the bale G1 are achieved by force. At this time, the resistance force increases as the elastic body 80 bites into rt4 of the knurling 11C which is +L (7/7), and the rotation stop and removal stop 41 come out more firmly. The installation work is extremely simple, and if the clutch release bearing 20 is damaged, it can be removed and replaced, which is economical.

Incidentally, the band 80 may be press-fitted between the inner race 21 and the end of the solder attachment portion after the clutch release bearing 20 is fitted into the bearing attachment portion 11. Furthermore, the seven lunges 81 of the band 31) may be omitted.

FIG. 5 shows a structure in which a spiral groove lid is formed on the outer periphery of the tip end 111L of the bearing mounting portion 11, and the elastic body 80 digs in as described above, producing the same effect and effect.

Note that the four grooves formed on the outer periphery of the tip portion 11a are not limited to the example given here, but may be changed or modified as appropriate without changing the gist of the present invention. It goes without saying that 7j0 is also good.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal section M showing one embodiment of the present invention, FIG. 2 is a right side view of FIG. 1, and FIG. 8 is a front view showing a bearing hub to which an elastic body is applied. In the explanatory diagram of the symbols, 10 is a pair of synthetic resin knobs, 11 is a fitting part, 20 is a clutch release bearing, 80 is an elastic body, and 11o and lla are a large number of grooves, respectively. Patent applicant Reio Nakai, representative of Aisin Seiki Co., Ltd.

Claims (1)

[Claims] A clutch release bearing is fitted to the outside of the clutch release bear cylinder fitting part of the synthetic resin sewn bearing hub, and between the inner race inner periphery of this clutch release bearing hub and the outer periphery of the clutch release bear cylinder fitting part. An elastic body is interposed in a compressed state, and a large number of grooves are formed on the outer periphery of the cylinder fitting portion when the elastic body hits the cylinder.
At ttt, the elastic body elastically deforms and bites, and the friction force between the elastic body and each of the inner race and the clutch release pair cylinder fitting part is applied to the clutch release bear cylinder fitting part. A clutch release bear cylinder device characterized by regulating the rotation and removal of the inner race. □