JPH0728247U - Sliding bush - Google Patents

Abstract

(57) [Summary] [Structure] An annular flange extending axially outward from the outer peripheral end of the bearing is provided, and one large opening of the dust boot is locked to the outer periphery of the flange and the small opening of the other end is a ball stud. An annular convex portion is provided which is in close contact with the surface of the handle and which fixes the outer peripheral end of the bearing to both ends of the inner and extends in the inner peripheral direction. [Effects of the Invention] Since separate parts such as a bearing fixing plug are not required, the component parts and the assembling process can be reduced, and the bearing can be assembled by simply caulking the cylindrical inner, and the inner preforming is performed. Is unnecessary, and the manufacturing process can be reduced, so that the manufacturing cost of the sliding bush can be reduced. Therefore, it is possible to provide at low cost a sliding bush in which the number of constituent parts is reduced and simplified without impairing the original function.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sliding bush used for a suspension system of an automobile.

[0002]

[Prior art]

 Conventionally, as shown in the left half of FIG. 2, an outer cylinder 117 having a substantially cylindrical shape, and a spherical head 103 arranged in the center of the coaxial shafts 5 and 6 are provided with the shafts 105 and 106 and the spherical head 103. The ball stud 102 is integrally formed, and the inner cylinder 116 is concentrically provided between the outer cylinder 117 and the ball stud 102, and is vulcanized and bonded between the outer cylinder 117 and the inner 116. A rubber elastic body 118 is interposed, and an inner spherical surface having substantially the same curvature as the spherical surface of the ball stud 102 is provided between the inner 116 and the ball stud 102, and the ball stud 102 is swingably and rotatably enclosed. The bearing 111 is installed. A partial spherical convex portion 128 is formed on the inner periphery of the inner part 116 near the opening 132, an annular flange 115 is provided on the inner periphery of the inner part 116 near one end opening 132, and the other end opening 131. A circumferential recess 119 is formed on the inner circumference, and an annular plug 130 having an L-shaped cross section is fitted in the circumferential recess 119. The bell-shaped dust boots 121, 121 have large openings 135, 135 at one end closely attached to the outer peripheral portion 123 of the flange 115 and the outer peripheral portion 124 of the plug 130 of the inner 116, and are mounted by an annular circlip 134, while the other end has a small opening. The parts 133 and 133 are in close contact with the surfaces of the handle parts 105 and 106 of the ball stud 102.

Further, as shown in the right half of FIG. 2, in the conventional sliding bush 101, the plug 130 is press-fitted into the inner 116 so that the inner ring 116 and the plug 130 prevent the bearing 111 from moving. ing.

[0004]

[Problems to be solved by the device]

 However, in the above structure, in order to prevent the rattling of the bearing 111, the axial dimensions of the circumferential recess 119 and the spherical projection 128 of the inner 116 and the axial length of the bear ring 111 can be accurately adjusted. Since it needs to be managed, a process such as cutting is required to form the inner 116 in the above-described shape. In addition, since the plug 130 for fixing the bearing 111 is necessary, the number of components increases. Therefore, there is a problem that the manufacturing process of the sliding bush 101 becomes high due to the complicated process.

Further, since the circumferential recess 119 and the spherical projection 128 are formed, the inner 116 is unnecessarily thick, and there is a problem that the weight of the sliding bush 101 becomes heavy.

The present invention solves the problems described above, facilitates the processing of components, reduces the number of components without impairing the original function, reduces the weight of the sliding bush, and reduces the sliding bush. It is intended to reduce the manufacturing cost of.

[0007]

[Means for Solving the Problems]

 The present invention has the following configuration.

Between the outer cylinder and the ball stud, a substantially cylindrical outer cylinder, a ball stud in which a spherical head is disposed in the center of a coaxial handle, and the handle and the spherical head are integrally formed It has a substantially cylindrical inner, and a pair of bearings in the axial direction that encloses the ball stud swingably and rotatably is interposed between the inner and the ball stud, and rubber elasticity is provided between the outer cylinder and the inner. In the sliding bush in which the body is interposed and the shank of the ball stud protrudes from the openings on both ends of the bearing, an annular flange extending axially outward from the outer peripheral edge of the bearing is provided, and the dust boot has one large opening on the outer periphery of the flange. , The other end small opening is brought into close contact with the surface of the ball stud handle, and the outer peripheral end of the bearing is fixed to both ends of the inner ring to provide an annular protrusion extending in the inner peripheral direction.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to FIG.

Reference numeral 1 denotes a ball joint, which has an outer cylinder 17 which is substantially cylindrical outside and whose both ends are bent in the inner diameter direction, and a ball head 3 which is arranged inside the outer cylinder 17 in the center of the shafts 5 and 6 coaxial with each other. The handle parts 5 and 6 and the ball head 3 are integrally formed, and the annular protrusion parts 8 and 8 are provided at both ends of the handle parts 5 and 6, and they are adjacent to the annular protrusion parts 8 and 8 and are circumferentially inward in the axial direction. The ball stud 2 is provided with a metallic ball stud 2 in which the concave portions 9 and 9 are formed. The ball stud 2 has a hollow shape in which a through hole 36 is formed in the axial center, and a spherical concave groove 37 is formed in the axial center portion. There is. Then, between the ball stud 2 and the outer cylinder 17, there is arranged an inner 16 having a cylindrical shape and annular projections 15 and 15 provided in the inner circumferential direction at both ends. A vulcanized rubber elastic body 18 is interposed between the outer cylinder 17 and the inner 16. Between the inner 16 and the ball stud 2, a pair of substantially cylindrical bearings made of resin and arranged in the axial direction. The bearings 11 and 11 are interposed, the outer peripheral ends 13 and 13 of the bare rings 11 and 11 extend outward in the axial direction, and the inner peripheral surface is chamfered to provide annular convex portions 14 and 14 in the outer peripheral direction of the ends. Annular flanges 12, 12 are provided. The ball stud 2 has its stems 5 and 6 projecting from the openings 26 and 27 at both ends of the bearings 11 and 11, and the ball head 3 has a curvature substantially the same as the outer spherical surface 32 of the ball head 3. It is surrounded by a bearing 11 having a spherical surface 31 and is swingably and rotatably enclosed in the inner 16.

Reference numeral 21 is a dust boot, which is bell-shaped and has a large opening 35 at one end provided with a circumferential concave portion 22 on the outer periphery and is locked to the outer peripheral surfaces of the annular flange portions 12, 12 of the bearings 11, 11. An annular circlip 34 is mounted in the circumferential recess 22 and an annular lip 23 is formed at the end of the small opening 33 at the other end. Close to.

Next, the manufacturing method of the present invention will be described.

First, a metal pipe material having a predetermined diameter is cut into a predetermined size to form the inner 16 and the outer cylinder 17, and the metal pipe material is subjected to press working and cutting work to form the ball stud 2. The bearings 11 and 11 are molded by molding and resin molding. Then, the rubber elastic body 18 is injection molded, vulcanized and bonded, and is interposed between the outer cylinder 17 and the inner 16. Next, the ball stud 2 is placed inside the inner 16, and the bearings 11, 11 are fitted into both openings of the inner 16. Then, both ends of the inner 16 are crimped to form the annular convex portion 15 and the bearings 11, 11 are fixed without looseness. Finally, the one end large openings 35, 35 of the dust boots 21, 21 are mounted on the outer circumferences of the annular flanges 12, 12 of the bearings 11, 11, and the circular circlips 34, 34 are attached to the dust boots 21, 21 large openings. 35, 35 are mounted in the circumferential recesses 22, 22 formed on the outer peripheral surface of the ball stud 2, and the other end small openings 33, 33 are mounted in the ball stud 2 handles 5, 6.

The sliding bush 1 configured as described above is provided with an annular flange portion that extends axially outward from the outer peripheral end portion of the bearing 11, and the dust boot 2 1 one end large opening portion 35 is engaged with the outer periphery of the flange portion 12. The small opening 33 at the other end is brought into close contact with the surfaces of the ball studs 2 and 5, 6 and the annular projections 15 extending in the inner circumferential direction are provided at both ends of the inner 16 so that the bearing 11 is not loose. It can be fixed, and it is not necessary to form a circumferential recess and a circumferential groove for fixing the bearing 11 on the inner 16. Further, the inner member 16 does not become thicker than necessary, and the parts for fixing the bearing 11, such as a plug, are unnecessary.

It should be noted that the structure of the present invention may be adopted in a ball joint having a ball stud having stems at both ends of a ball head, which does not include an outer cylinder and a rubber elastic body.

[0016]

[Effect of device]

 As described above, according to the present invention, the annular flange portion that extends axially outward from the outer peripheral end portion of the bearing is provided, the one end large opening of the dust boot is locked to the outer periphery of the flange portion, and the other small opening portion is the ball. Since it is closely attached to the surface of the stud handle, and the outer peripheral end of the bearing is fixed to both ends of the inner ring and the annular protrusions that extend in the inner peripheral direction are provided, separate parts such as a plug for fixing the bearing are unnecessary. The component parts and assembly process can be reduced, and the bearing can be assembled by simply caulking the tubular inner, preforming of the inner is not required and the manufacturing process can be reduced, thus reducing the manufacturing cost of the sliding bush. You can Therefore, it is possible to provide at low cost a sliding bush in which the number of components is reduced and simplified without impairing the original function.

[Brief description of drawings]

FIG. 1 is a sectional plan view showing a sliding bush according to an embodiment of the present invention.

FIG. 2 is a cross-sectional plan view showing the assembling of a conventional sliding bush on the left half and the conventional sliding bush on the right half.

[Explanation of symbols]

 1 Sliding Bushing 2 Ball Stud 3 Ball Head 5 Handle 6 Handle 11 Bearing 12 Flange 13 Outer Edge 15 Annular Convex 16 Inner 17 Outer Cylinder 18 Rubber Elastic 21 Dust Boot 26 Opening 27 Opening 33 Small Opening 35 Large opening

Claims (1)

[Scope of utility model registration request] 1. A substantially cylindrical outer cylinder (17) and a spherical head portion (3) arranged in the center of coaxial handle portions (5) and (6), and the handle portions (5) and (6). A ball stud (2) integrally formed with a ball head (3) and a substantially cylindrical inner (16) between the outer cylinder (17) and the ball stud (2) are provided. 16) and the ball stud (2) are provided with a pair of axial bearings (11), (11) for swingably and rotatably enclosing the ball stud (2),
A rubber elastic body (18) is interposed between the outer cylinder (17) and the inner (16), and the bearings (11), (1
1) In a sliding bush in which the handle parts (5) and (6) of the ball stud (2) protrude from the both end openings (26) and (27), the outer peripheral end parts (13) of the bearings (11) and (11). ), (13) are provided with annular flange portions (12), (12) extending axially outward, and the flange portions (1
2), (12) The outer periphery of the dust boot (21) is locked with the large opening (35) at one end, and the small opening (33) at the other end is on the surface of the ball stud (2) handle (5), (6). Annular projections (15), (15) which are closely contacted with each other and which have the bearings (11), (11) outer peripheral ends (13), (13) fixed to both ends of the inner (16) and which extend in the inner peripheral direction. A sliding bush characterized by being provided with.