JPH04122821U - Constant velocity joint boots - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a constant velocity joint boot in which a clamp is easy to insert, and once the clamp is inserted, it is difficult to fall off. [Configuration] The whole has a substantially truncated conical shape to cover the joint part of the drive shaft. A constant velocity joint made of resin, in which one end side is a large diameter part 2 that is attached to a joint part of a drive shaft via a clamp 9, and the other end side is a small diameter part 3 that is attached to the drive shaft via a clamp 9. The boot is provided with notches 5a and 6a on the outside of ribs 5 and 6 for preventing the clamp 9 from falling off provided on the large diameter part 2 and the small diameter part 3 so that the ribs 5 and 6 can incline toward the inner end. Ta. This makes it easier to insert the clamp 9 into the constant velocity joint boot, and once the clamp 9 is inserted, there is no risk of it falling off.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is a constant velocity joint used for drive shaft constant velocity joints. It's about boots.

0002

[Conventional technology]

Conventionally, as shown in Fig. 5, this type of constant velocity joint boot has an approximately It is formed into a truncated cone shape, and the large diameter portion 22 side is the joint of the drive shaft. The driver is attached to the small diameter portion 23 at the other end via a clamp. Constant velocity joint boot into which the eve shaft is inserted and attached via a clamp 21 are known. This clamp secures the boot 21 to the drive shaft, etc. However, in the past, a one-touch type click as shown in Figure 8 was used. A lamp 29 is used, and tightening is achieved by pulling and bending the bent portion 30. It was clear.

0003 Each end of the constant velocity joint boot 21 is provided with a respective one to prevent the clamp 29 from falling off. Ribs 25 and 26 are provided in a protruding manner, and a clamp 29 is installed inside the ribs 25 and 26. Groove portions 27 and 28 are provided into which are inserted. Note that the rib on the large diameter portion 22 side 25 are provided at six locations on the outer periphery of the proximal end as shown in FIG. The ribs 26 are provided at four locations.

0004 In recent years, high-speed performance of vehicles is required, and maintenance-free - Due to the need for weight reduction, the boots 21 have changed from rubber to resin. It has transitioned to However, compared to conventional rubber boots, this resin constant velocity joint boot is Since the conventional clamp 29 is made of a hard material, the drive shaft and It is insufficient to ensure sealing performance at the installation site between the joint and the joint. Ta. In other words, with the one-touch type clamp 29, the tightening margin is small compared to the clamping force. Because the clamp 29 is to overcome the ribs 25 and 26, the tightening allowance must be increased. However, if this is done, there is a risk that the base end of the bent portion 30, etc. may break. Therefore, Instead of this one-touch type clamp 29, a circular ring shape as shown in Fig. 7 can be used. A caulking type clamp 9 is mainly used.

[0005]

[Problem that the idea aims to solve]

However, even with this caulking type clamp 9, the release when it is free before caulking is Since the difference between the ring diameter and the ring diameter after caulking is small, clamp 9 is attached to boot 2. 1, the ribs 25 and 26 of the boot 21 may become an obstacle when inserting the clamp 9. However, the problem of On the other hand, the ribs 25 and 26 prevent the clamp 9 from falling off. It is an essential component for stopping the system and cannot be excluded.

[0006] This invention was made in view of the above-mentioned circumstances, and its purpose is to A constant velocity joint boot that is easy to insert and does not easily fall off once the clamp is inserted. The aim is to provide the following.

[0007]

[Means to solve the problem]

In order to achieve the above purpose, the present invention covers the joint part of the drive shaft. The whole is shaped like a truncated cone, and one end is the joint of the drive shaft. It is a large diameter part that is attached to the drive shaft via a clamp, and the other end is attached to the drive shaft. A constant velocity joint boot made of resin that is a small diameter part that is attached to the engine via a clamp. A clamp release device provided on at least one of the large diameter portion and the small diameter portion. A cutout is provided on the outside of the fall prevention rib so that the rib can tilt toward the inside end. The main points are as follows.

[0008]

[Effect]

According to the above configuration, the notch is provided on the outside of the rib, so the rib is located at the inner end. It slopes toward the sides, but not toward the outer edge. Therefore, the clamp tilts the rib. It can be easily fitted into the constant velocity joint boot, but once it is fitted, The clamp will not fall out accidentally.

[0009]

【Example】

An embodiment of the constant velocity joint boot of the present invention is shown below in Figures 1 to 4 and 6. The explanation will be based on 7. FIG. 1 shows a boot 1 for a constant velocity joint in this embodiment, and the entire boot 1 is It is formed approximately in the shape of a truncated cone. One end of this boot 1 is the drive shaft. It is formed in the large diameter part 2 that is attached to the joint part, and the other end side is connected to the drive shaft. The small diameter portion 3 is formed into a small diameter portion 3 through which the hole is inserted. The middle part of the boots has a peak and a valley. Alternating bellows portions 4 are formed.

0010 As shown in FIG. 1, ribs 5 and 6 are provided at the ends of the large diameter section 2 and the small diameter section 3. It protrudes perpendicularly to the axial direction of the parts 1. The rib 5 on the large diameter portion 2 side is The ribs 6 on the small diameter portion 3 side are provided at 6 locations similarly to the conventional ribs shown in 6. It is set in place. On the outside of each rib 5, 6, as shown in FIG. Notches 5a and 6a opening outward are recessed in the parts, and the boot is connected to the connecting parts 11 and 12. It is connected to the main body of the tube 1, and obliquely tapered portions 5b, 6b are formed therein.

[0011] As shown in Fig. 1, a clamp to be described later is inserted between the bellows part 4 and the ribs 5 and 6. Annular grooves 7 and 8 are formed. As shown in FIG. 1, the width B of the connecting portion 11 is the width B of the rib 5 on the large diameter portion 2 side. The dimensional ratio of the width A to the width B of the connecting portion 11 is B/A within the range of 0.5 to 0.2. , and the width B of the connecting portion 11 is preferably in the range of 1.0 to 0.2 mm. sand In other words, if the value of B/A is greater than 0.5 or the width B exceeds 1.0 mm, the rib 5 becomes difficult to bend, the value of B/A becomes smaller than 0.2, or the width B becomes 0.2 mm. This is because the strength of the connecting portion 11 becomes unreliable if it is less than that.

0012 On the other hand, as shown in Figure 7, a circular ring formed by winding a single ribbon The caulking type clamp 9 is provided with a pair of caulking parts 10 in a part thereof. In addition, the space between both caulked portions 10 is a tightening margin. Now, the boot 1 formed as described above is of a caulking type as shown in FIGS. 2 to 4. The clamp 9 is inserted from the outside, but first the clamp 9 is removed as shown in Figure 3. The tapered portion 5b of the tab 5 is brought into contact with the taper portion 5b. This tapered portion 5b is formed obliquely. The position of the clamp 9 can be determined by using . Then, further tighten the clamp 9 to the ribs. When pressed against the outward elasticity of the ribs 5, the ribs 5 bend inward, as shown in FIG. , the clamp 9 is inserted into the groove 7. The above process is performed on the small diameter part 3 side of the boot 1. The same sequence is followed in .

[0013] In this way, the clamp 9 inserted into the grooves 7 and 8 will be caulked in the next step. , the ribs 5 and 6 do not bend outward from the grooves 7 and 8, so they cannot be transported to the caulking process. There is no risk that the clamp 9 will fall off inside. Therefore, clamping workability is improved. improves. Then, it is transported to the caulking process, and the caulking part 10 of the clamp 9 is caulked. The boot 1 is attached to the drive shaft and the joint of the drive shaft. Installed.

[0014] Therefore, the clamp 9 can be easily inserted into the grooves 7 and 8 of the boot 1. Furthermore, once the clamp 9 is inserted into the grooves 7 and 8, there is no risk of it falling off. It should be noted that the present invention is not limited to the above-mentioned embodiments, and may be modified without departing from the spirit of the invention. It is also possible to change a part of the configuration as appropriate within the scope and implement it as follows. (1) In the above embodiment, the ribs 5 and 6 are placed at six locations on each of the large diameter portion 2 side and the small diameter portion 3 side. The ribs 5 and 6 are provided in four places, but the ribs 5 and 6 are made as small as possible to prevent the clamp 9 from falling off. As long as they are provided at three locations, it is also possible to provide them, for example, all around the circumference. In addition, it is lightweight It is preferable to minimize the number of ribs 5 and 6 in order to reduce the number of ribs 5 and 6. (2) The shapes of the notches 5a, 6a of the ribs 5, 6 are not limited to those of the above embodiments. It is also possible to form a notch with an arcuate cross section. (3) In the above embodiment, the sloped surfaces of the tapered portions 5b and 6b were formed into a flat shape. The curved surface may have a curved surface.

[0015]

[Effect of the idea]

As detailed above, according to the present invention, the crank The clamp is easy to insert, and once the clamp is inserted, it is difficult to fall off. This has the effect of improving installation workability.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an operational diagram of clamp attachment showing an embodiment of the present invention.

FIG. 3 is an operational view of clamp attachment showing an embodiment of the present invention.

FIG. 4 is an operational view of clamp attachment showing an embodiment of the present invention.

FIG. 5 is a sectional view of a constant velocity joint boot, showing a conventional example.

FIG. 6 is a sectional view of a constant velocity joint boot, showing a conventional example.

FIG. 7 is a cross-sectional view of the clamp.

FIG. 8 is a perspective view of a clamp, showing a conventional example.

[Explanation of symbols]

2... Large diameter part, 3... Small diameter part, 5, 6... Rib, 5a, 6a...
Notch, 9...clamp.

Claims (1)

[Scope of utility model registration request] Claim: 1. A large-diameter portion (2) formed entirely in a substantially truncated conical shape so as to cover the joint portion of the drive shaft, and one end thereof is attached to the joint portion of the drive shaft via a clamp (9); A constant velocity joint boot made of resin, the other end of which is a small diameter portion (3) attached to the drive shaft via a clamp (9),
A rib (5,
6) A constant velocity joint boot characterized in that cutouts (5a, 6a) are provided on the outside of the ribs (5, 6) to allow the ribs (5, 6) to incline toward the inner end.