JPH04128522U - Dust cover mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] In the dust cover mounting structure, a protrusion is provided on the inner peripheral surface of the mounting bracket to prevent the dust cover from coming off from the socket. [Structure] The ball stud 4 has a spherical part at the lower end, and this spherical part is rotatably held in the socket 5. A cylindrical dust cover 1 is disposed at the connection portion between the ball stud 4 and the socket 5. A caulking fitting 2, which is an annular fitting, is attached to the open end of the dust cover 1 on the socket 5 side. A protrusion projecting inward is provided on the inner circumferential surface of the caulking metal fitting 2. When the caulking metal fitting 2 is fitted into the socket 5, the protrusion is simultaneously engaged with the socket 5, so that the dust cover 1 is fitted into the socket 5 together with the caulking metal fitting 2.
Prevent them from leaving.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is a suspension system for absorbing vibrations of automobiles, agricultural machinery, construction machinery, etc. It is also used to protect the smooth surface of ball joints used in steering devices, etc. Regarding the mounting structure of the dust cover, especially when the dust cover comes off from the socket. This invention relates to a dust cover mounting structure that prevents this from occurring.

0002

[Prior art and its problems]

Conventionally, the mounting structure of the dust cover for ball joints is shown in Figure 4. Something like this is known. That is, in the dust cover mounting structure shown in FIG. A spherical part provided at the lower end of 4 is rotatably held in socket 25, and A dust cover 21 is disposed between the nut 25 and the ball stud 24 to cover it. It is something that

0003 In FIG. 4, the ball stud 24 is a substantially cylindrical connecting member, with a ball at the bottom end. This spherical part is rotatably held in the socket 25. At this time, the spherical part of the ball stud 24 is connected to the socket 25 via the elastic body 26. The ball stud 24 slides, rotates, or moves around the spherical part. It is possible to swing freely.

0004 The socket 25 holding the ball stud 24 has the ball stud 24 inside. It has a cavity in which the spherical part is placed, and a mounting part 25a is provided at the upper end. The end of the dust cover 21 is fitted and fixed to the attaching part 25a, and the socket 25 and the ball are connected to each other. A dust cover 21 is disposed and fixed between the stud 24 and the stud 24 so as to cover the dust cover 21 .

[0005] This dust cover 21 has a small diameter opening on the ball stud 24 side at the top end. A cylindrical membrane member made of an elastic material and having a large diameter opening on the socket 25 side at the lower end. It is. Then, the ball stud 24 side of the dust cover 21 and the socket 25 A lip portion is provided in an annular shape inside the side opening, and each lip portion is provided with a ball stud 24. The lip portion provided in the side opening is in contact with the outer peripheral surface of the ball stud 24. The lip part provided at the opening on the socket 25 side seals the socket 25. It is in contact with and seals the outer peripheral surface of the provided mounting portion 25a.

[0006] Here, as a method of fixing the dust cover 21 to the socket 25, there is a fitting method. There is a way to be called. As one means for this, although not shown, the dust cover 21 An annular reinforcing member is buried in the large diameter opening end on the side of the socket 25, and this opening end by fitting the dust cover 21 into the mounting part 25a of the socket 25. There is something to fix it to the cutter 25. However, in this case, due to molding restrictions, the mold release In order to facilitate I can't get rid of it. Therefore, the membrane design of the dust cover 21 is limited, and the ball There was a problem in that the sliding angle of the stud 24 could not be increased. So Here, in order to increase the degree of freedom in the membrane design of the dust cover 21, A method was devised in which the reinforcing member was not buried in the large diameter opening end on the socket 25 side of No. 1. ing.

[0007] That is, the open end of the dust cover 21 on the socket 25 side as shown in FIG. A caulking fitting 22, which is a mounting fitting, is attached to the top. This caulking metal fitting 22 , has an annular shape as a whole, and has an open end on the socket 25 side of the dust cover 21. This caulking metal fitting 22 is formed in a shape that surrounds the dust cover 21. By caulking and fixing the opening end of the dust cover 21, the caulking fitting 22 is secured. I'm trying to keep it from falling out. Then, the dust cover 21 is attached and caulked. The metal fitting 22 is fitted into a mounting portion 25a provided at the upper end of the socket 25 and fixed. has been done.

[0008] With the above configuration, dust can be prevented between the ball stud 24 and the socket 25. The cover 21 is arranged to cover the connection between the ball stud 24 and the socket 25. In addition to protecting the joint from external water and dust, it also protects the ball stud 24 from rotating and swinging. The dust cover 21 slides and follows the ball stud 24 and the socket. This ensures a good seal between the cut 25 and the dust cover 21.

[0009] However, in the conventional dust cover mounting structure, the mounting brackets The shape of the inner peripheral surface of some caulking fittings 22 has a straight cross section, so the socket The fitting retention force with No. 25 was relatively weak and tended to be easily influenced by the condition of the fitting surface. In other words, the adhesion of oil on the mating surface, the size of the tightness, or when mating to the socket 25. Due to deformation of the caulking metal fitting 22, etc., the fitting retention force is insufficient, and the caulking metal fitting 2 2 may come off from the socket 25 together with the dust cover 21.

0010 This idea solves the above-mentioned problems and improves the membrane design of the dust cover. The dust cover mounting structure uses mounting brackets that can increase the degree of freedom. After fitting the mounting bracket attached to the dust cover to the mounting part of the socket, , a dust cover that prevents the mounting bracket and dust cover from coming off the socket. The purpose is to provide a mounting structure for.

[0011]

[Means to solve the problem]

This idea was developed to solve the above problems by creating a ball ball with a spherical part. between the tad and the socket that rotatably holds the spherical part of this ball stud. A dust cover mounting structure covered with a cylindrical dust cover, wherein the dust cover is covered with a cylindrical dust cover. A mounting bracket having an annular shape as a whole is provided at the opening end on the socket side, and this mounting bracket The tool can be fitted into the mounting portion of the socket and at least one part of the inner circumferential surface of the socket. This method employs a method in which a protrusion that protrudes inward is provided in the portion.

0012

[Effect]

By adopting the above-mentioned method, this invention allows the ball stud and socket to be By placing the dust cover between the It protects the space between the ball stud and socket from external water and dust, and also protects the space between the ball stud and socket. The dust cover slides and follows the rotation and swinging of the Rustud. Ensures sealing between the ball stud and socket and the dust cover .

[0013] The mounting bracket attached to the open end of the dust cover on the socket side The dust cover is fixed to the socket by fitting into the mounting part of the socket. child At this time, the protrusion protruding from the inner peripheral surface of the mounting bracket is locked to the mounting part of the socket. , by preventing the mounting bracket from moving away from the socket, dust can be removed. The cover is designed to prevent the cover from detaching from the socket together with the mounting bracket. Ru.

[0014]

【Example】

Embodiments of this invention will be described below with reference to the drawings. FIG. 1 is a diagram showing an embodiment of the dust cover mounting structure according to this invention. A spherical part provided at the lower end of the ball stud 4 is rotatably held in the socket 5, A dust cover 1 is disposed between the socket 5 and the ball stud 4 to cover it. It is.

[0015] In FIG. 1, the ball stud 4 is a nearly cylindrical connecting member, with a spherical shape at the lower end. This spherical part is rotatably held in the socket 5. this At this time, the spherical part of the ball stud 4 is held in the socket 5 via the elastic body 6. The ball stud 4 can slide, rotate, or swing freely around the spherical part. It becomes.

[0016] The socket 5 that holds the ball stud 4 has a spherical part of the ball stud 4 inside. A mounting portion 5a is provided at the upper end of the mounting portion 5a. The open end of the dust cover 1 is fitted and fixed to the socket 5 and the ball stud. 4, the dust cover 1 is disposed and fixed so as to cover it.

[0017] This dust cover 1 has a small diameter opening on the ball stud 4 side, and It is a cylindrical membrane member made of an elastic member and having a large diameter opening on the socket 5 side. So Then, the lip part is ringed inside both the openings on the ball stud 4 side and the socket 5 side. The lip part provided in the opening on the ball stud 4 side is , contact the outer peripheral surface of the ball stud 4 to seal it, and connect it to the opening on the socket 5 side. The provided lip portion contacts and seals the mounting portion 5a provided on the socket 5. ing.

[0018] At the open end of the dust cover 1 on the socket 5 side, there is a caulking fitting 2 that is a mounting fitting. is attached, and this caulking metal fitting 2 is fitted into the mounting part 5a provided on the socket 5. By doing so, the dust cover 1 is fixed to the socket 5. This caulking metal fitting 2 has an annular shape as a whole, as the main part is shown in Fig. 2. At the same time, it is formed in a shape that surrounds the opening end of the dust cover 1 on the socket 5 side. The inner circumferential surface of this caulking fitting 2 has one end protruding inward from the inner circumferential surface. Four protrusions 3 are provided at equal intervals. And this caulking metal fitting 2 is the dust cover By caulking and fixing the opening end on the socket 5 side of 1, the dust cover 1 is secured. This prevents it from coming off from the caulking metal fitting 2.

[0019] The caulking metal fitting 2 attached to the dust cover 1 is It is fitted onto and fixed to the attaching portion 5a. At this time, the protrusion provided on the inner peripheral surface of the caulking fitting 2 3 is locked to a mounting part 5a provided on the socket 5, and the caulking metal fitting 2 is moved upward. It prevents you from moving.

[0020] With the above configuration, a dust cover is provided between the ball stud 4 and the socket 5. -1 is placed to cover the ball stud 4 and socket from external water and dust. In addition to protecting the connecting part with ball stud 5, it also protects against rotation and swinging of ball stud 4. By sliding and following the strike cover 1, the ball stud 4 and socket 5 This ensures sealing between the dust cover 1 and the dust cover 1.

[0021] A mounting bracket is attached to the open end of the dust cover 1 on the socket 5 side. The caulking fitting 2 is fitted into the mounting part 5a provided on the socket 5, and is attached to the dust cover. -1 to the socket 5. At this time, the The cut protrusion 3 locks onto the mounting portion 5a of the socket 5, thereby causing caulking. This prevents the metal fitting 2 from moving upward, and prevents the caulking metal fitting 2 and dust cover 1 from moving upward. This prevents it from coming off from the cage 5.

[0022] In the above embodiment, the protrusions 3 of the caulking fitting 2 are provided at four equal intervals on the inner peripheral surface. However, they may be provided circularly in the circumferential direction.

[0023] FIG. 3 is a diagram showing a modification of the above embodiment. In FIG. 3, the attachment is attached to the open end of the dust cover 1 on the socket 5 side. The caulking metal fitting 2, which is a metal fitting, has an annular shape as a whole and is attached to the socket of the dust cover 1. It is formed in a shape that surrounds the opening end on the 5 side, and the upper edge of the inner periphery is A protrusion 3 is provided in a circular shape in the circumferential direction so as to protrude in the direction. And this oak The fitting 2 is fixed by caulking the opening end of the dust cover 1 on the socket 5 side. This prevents the dust cover 1 from coming off from the caulking fitting 2. And da The caulking metal fitting 2 to which the stop cover 1 is attached is fitted into the socket 5 and fixed. .

[0024] The socket 5 that fits into the caulking fitting 2 is provided with a mounting portion 5a at its upper end. In addition, a notch groove 7 is formed in an annular shape at a portion of the mounting portion 5a corresponding to the protrusion 3 of the caulking fitting 2. When the caulking metal fitting 2 is fitted into the socket 5, the protrusion 3 is locked in the notch groove 7. This prevents the caulking fitting 2 from moving upward.

[0025] With this configuration, the opening end of the dust cover 1 on the socket 5 side When the caulking metal fitting 2 attached to the socket 5 is fitted into the mounting part 5a of the socket 5, The protrusion 3 provided at the upper end of the inner circumference of the tightening fitting 2 is locked into the notch groove 7 of the socket 5. In order to prevent the crimping fitting 2 from moving upward, the crimping fitting 2 and dust This prevents the cover 1 from detaching from the socket 5.

[0026] In addition, in the above modification, the protrusion 3 of the caulking fitting 2, which is the mounting fitting, is arranged in the circumferential direction. Although they are provided in a circular shape, they are not limited to this, and may be provided equally in multiple locations. Therefore, the notch grooves 7 of the socket 5 are also formed at multiple locations at equal intervals to correspond to the protrusions 3. Good too. In short, the protrusion 3 of the mounting bracket 2 in this invention is the inner part of the mounting bracket 2. By protruding inward on the peripheral surface, the mounting bracket 2 is prevented from coming off from the socket 5. The shape and number are not limited as long as they can be prevented.

[0027] In addition, in the embodiments and modified examples, the peripheral surface of the mounting portion 5a of the socket 5 is A notch groove 7 is provided, and the protrusion 3 of the caulking fitting 2, which is a mounting fitting, is positioned in this notch groove 7. Although an example in which the cutout groove 7 is not provided is shown, the present invention is not limited to this. Also, when the tip of the protrusion 3 is engaged with the mounting part 5a, the mounting bracket 2 and dust can be removed. It is possible to prevent the cover 1 from coming off the socket 5.

[0028] Furthermore, in the above embodiments and modified examples, a dust cover is used as a mounting bracket. Although the caulking metal fitting 2 is shown at the opening end of 1, the present invention is not limited to this. Attachment portion 5a of socket 5 is attached to the open end of cover 1, which is the attachment side to socket 5. It suffices if a mounting bracket is provided that fits into the.

[0029]

[Effect of the idea]

As described above, according to this invention, in the mounting structure of the dust cover, the mounting The dust cover has a protrusion that protrudes inward on at least a portion of the inner circumferential surface of the tool. When fixing the dust cover to the socket, attach the mounting bracket attached to the dust cover to the socket. At the same time as it is fitted into the mounting part, the protrusion of the mounting bracket will not lock onto the circumferential surface of the mounting part. This can prevent the mounting bracket from moving in the direction of detachment from the socket. Therefore , after fitting the mounting bracket into the socket, the dust cover is inserted into the socket together with the mounting bracket. There will be no chance of leaving due to the cut.

[0030] In addition, by using a mounting bracket with protrusions, it is possible to easily connect the mounting bracket with a simple structure. It is possible to increase the retention force for mating with the socket, so the mating dimensional tolerances, i.e. tolerances of the inner diameter of the mounting bracket and the outer diameter of the socket mounting part. , the accuracy of the mating surface, that is, the inner circumferential surface of the mounting bracket and the outer circumferential surface of the socket mounting part. There is no need to strictly set accuracy, which reduces manufacturing costs. It has the effect of being able to

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of this invention.

FIG. 2 is a cross-sectional view of a main part of the mounting fitting in this invention.

FIG. 3 is a diagram showing main parts of a modification of the embodiment shown in FIG. 1;

FIG. 4 is a diagram showing a conventional example.

[Explanation of symbols]

1, 21...Dust cover 2, 22...Caulking metal fittings 3... Protrusion 4, 24...Ball stud 5, 25...socket 5a, 25a...Mounting part 6, 26...Elastic body 7...Notch groove

Claims (1)

[Scope of utility model registration request] [Claim 1] Ball stud (4) having a spherical part
and a socket (5) rotatably holding the spherical part of the ball stud (4), with a cylindrical dust cover (1). ) is provided with a mounting bracket (2) having an annular shape as a whole at the opening end on the socket (5) side, and the mounting bracket (2) can be fitted into the mounting portion (5a) of the socket (5). A dust cover mounting structure characterized in that a projection (3) projecting inward is provided on at least a portion of the inner circumferential surface.