JPH0651539U - Spherical bearing - Google Patents

Abstract

(57) [Abstract] [Purpose] Inserting a sliding resin member into the gap between the inner cylinder member and the outer cylinder member, and positioning and fixing this, improves the ease of assembly and the large number of parts The object is to provide a ball bearing that has good performance and a small number of parts. [Structure] A sliding resin member 7 interposed between an inner cylinder member 1 and an outer cylinder member 2 is self-lubricating and heat resistant around a reinforcing core metal 13 fitted around the inner cylinder member 1. It is configured to be formed by injection molding a synthetic resin having.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spherical bearing used for a suspension joint of a vehicle such as an automobile.

[0002]

[Prior art]

 A conventional spherical bearing used for a suspension joint of a vehicle such as an automobile has an inner cylinder member 1, an outer cylinder member 2 and an outer ring 3 which are fitted in a concentric state, as shown in FIG. A vibration damping rubber layer 4 is provided between the outer cylinder member 2 and the outer ring 3, and a convex spherical surface 5 formed on the outer diameter surface of the inner cylinder member 1 and an outer cylinder member facing the convex spherical surface 5. The sliding resin member 7 is interposed in the gap formed between the concave spherical surface 6 formed on the inner diameter surface 2 of the sliding resin member 7. A grease reservoir 8 is provided on the inner diameter surface of the sliding resin member 7 and is filled with grease.

The sliding resin member 7 is separately molded, and is inserted into the above-mentioned gap from one end thereof. After the insertion, the annular block 9 is applied to the outer end portion thereof, and the retaining ring 10 is further removed. By fitting on the inner diameter surface of the end of the tubular member 2, the block 9 is prevented from slipping out.

It should be noted that dust boots 11 and 11 are mounted between both ends of the inner tubular member 1 and the outer tubular member 2, respectively.

[0005]

[Problems to be solved by the device]

 In the conventional spherical bearing as described above, the sliding resin member 7 must be manufactured separately and inserted into the spherical gap between the inner and outer cylindrical members 1 and 2. Since it is necessary to fit 9 and the snap ring 10, there is a problem in that it takes time and effort to manufacture. Further, the block 9 and the retaining ring 10 are factors that increase the number of parts, and there is a problem that the cost becomes high.

Therefore, an object of the present invention is to provide a spherical bearing that solves these problems.

[0007]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention has respective members of an inner cylinder member, an outer cylinder member and an outer ring fitted in a concentric state, and a protective member is provided between the outer cylinder member and the outer ring. A spherical bearing having a vibrating rubber layer and a sliding resin member slidably fitted in the concave spherical surface of the inner cylindrical surface of the outer cylindrical member is interposed between the inner cylindrical member and the outer cylindrical member, An annular reinforcing core metal having a cross-sectional shape along the concave spherical surface of the outer cylinder member is fitted on the outer diameter surface of the inner cylinder member, and self-lubricating and heat-resistant on the inner and outer diameter surfaces of the reinforcing core metal. Having a structure in which the above-mentioned sliding resin member is formed by injection-molding a synthetic resin having properties and the resin material existing on the inner and outer surfaces of the reinforcing core is integrated by the connecting hole provided in the reinforcing core. Is.

[0008]

[Action]

 In the spherical bearing described above, an inner cylinder member having a reinforcing cored bar previously fitted to the outer diameter surface and an outer cylinder member fitted around the inner cylinder member are positioned and fixed in an injection molding die, and a predetermined injection hole is used. The molten resin material of the sliding resin member is injection molded. The resin materials on both sides of the reinforcing core metal are connected and integrated through the connecting holes of the reinforcing core metal, and a cooling gap is formed between the sliding resin member and the inner surface of the outer cylinder member by cooling after molding.

In use, the link of the suspension joint portion is inserted into the inner tubular member, the outer ring is attached to the suspension member, and slides between the spherical surface of the inner tubular member and the sliding resin member.

[0010]

【Example】

 The embodiment shown in FIG. 1 basically has an inner cylinder member 1, an outer cylinder member 2 and an outer ring 3 which are fitted in a concentric state as in the conventional case. A vibration-proof rubber layer 4 is provided between the ring 3 and the ring 3.

A shallow recess 12 is formed in the central portion of the inner cylinder member 1 in the circumferential direction, and a concave spherical surface 6 is formed on the inner diameter surface of the outer cylinder member 2 so as to face the recess 12. An annular reinforcing core metal 13 is fitted in the recess 12.

The reinforcing cored bar 13 has a convex spherical surface portion 14 that faces the concave spherical surface 6 of the outer tubular member 2, and both sides of the convex spherical surface portion 14 serve as inward flanges 15. It is fitted in the recess 12 of the. Further, a plurality of connecting holes 16 penetrating inward and outward are provided in the convex spherical surface portion 14 at appropriate intervals. Further, unevenness (not shown) is formed on the outer peripheral surface of the convex spherical surface portion 14 by knurling or the like for creep prevention. Further, the recesses 12 of the inner tubular member 1 are also provided with irregularities 17 for preventing creep.

Sliding resin members 7 are integrally formed with the core metal 13 on both inner and outer surfaces of the reinforcing core metal 13. The materials of the sliding resin member 7 existing on the inner and outer surfaces of the core metal 13 are connected by a plurality of connecting holes 16.

The sliding resin member 7 is a synthetic resin having self-lubricity, heat resistance and high rigidity (for example, polyphenylene sulfide (PPS) filled with polytetrafluoroethylene (PTFE) and polyimide (PI)). , 46 polyamide (PA) filled with PTFE and carbon fiber (CF), polyetherketone (PEEK) filled with PTFE and CF, etc.) by injection molding. The thickness t of the portion outside the reinforcing core 13 is set to about 0.5 to 2.0 mm 2.

The gaps between the inner and outer tubular members 1 and 2 on both sides of the sliding resin member 7 are formed to have substantially the same size, and both ends thereof are dust boots attached to the outer tubular member 2. It is blocked by 11.

The spherical bearing of the embodiment is as described above, and when manufacturing the spherical bearing, the reinforcing cored bar 13 is fitted into the recess 12 of the inner cylindrical member 1 in advance, and then the outer cylindrical member is attached to the inner cylindrical member 1. With 2 covered, the resin is positioned and fixed in an injection molding die, and the resin is injected from an injection hole provided in the outer peripheral portion of the cored bar 13 (see arrow a in FIG. 1) to perform injection molding. After the injection molding, the outer diameter surface of the outer cylinder member 2 is rapidly cooled to shrink the resin, and a predetermined gap is created between the resin member 7 and the inner diameter surface of the outer cylinder member 2. The amount of shrinkage of the resin material 7 is adjusted by the type and amount of the filler mixed in the resin material.

After the molding of the sliding resin member 7 is completed, the outer ring 3 is fitted to the outer cylindrical member 2 and the vibration-proof rubber layer 4 is vulcanized and bonded between them. At this time, heat is also applied to the sliding resin member 7, but since the resin has heat resistance, it is not affected by it.

In use, the ball bearing manufactured as described above slides between the concave spherical surface 6 and the sliding resin member 7. In this case, since the resin of the member 7 has self-lubricating property, it is not necessary to refuel.

[0019]

[Effect of device]

 As described above, according to this invention, the sliding resin member is formed by injection molding in the gap between the inner tubular member and the outer tubular member, so that the labor of inserting the member can be omitted. Further, since a part for fixing the member is unnecessary, the assembling property is excellent and the number of parts is reduced.

Further, since it is not necessary to provide a convex spherical surface on the inner cylindrical member by using the reinforcing core metal, the weight of the inner cylindrical member and the workability can be improved, and the sliding resin on the outer surface of the core metal can be achieved. The load capacity of the bearing can be increased by making the layers of the member thinner.

Further, since the bearing is a non-lubricated bearing, the fluctuation of friction torque and the occurrence of wear damage due to the leakage and depletion of grease are reduced and stabilized, and the control width of the bearing clearance can be reduced, so that the bearing with high accuracy can be obtained. Can be supplied.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment.

FIG. 2 is a sectional view of a conventional example.

[Explanation of symbols]

 1 Inner cylinder member 2 Outer cylinder member 3 Outer ring 4 Anti-vibration rubber layer 5 Convex spherical surface 6 Concave spherical surface 7 Sliding resin member 8 Grease reservoir 9 Block 10 Retaining ring 11 Dust boot 12 Recess 13 Reinforcement core 14 Convex spherical surface 15 Collar 16 Connection hole 17 Unevenness

Claims (1)

[Scope of utility model registration request] 1. An inner cylinder member, an outer cylinder member and an outer ring, which are fitted in a concentric state, each having an anti-vibration rubber layer between the outer cylinder member and the outer ring. In a spherical bearing having a slidable resin member slidably fitted on the concave spherical surface of the inner cylindrical surface of the cylindrical member, which is interposed between the inner cylindrical member and the outer cylindrical member, the outer cylindrical surface of the inner cylindrical member has an outer surface. An annular reinforcing core having a cross-sectional shape along the concave spherical surface of the cylindrical member is fitted and the inner and outer diameter surfaces of the reinforcing core are injection-molded with a synthetic resin having self-lubrication and heat resistance. A spherical bearing characterized in that a sliding resin member is formed, and a resin material existing on the inner and outer surfaces of the reinforcing core is integrated by a connecting hole formed in the reinforcing core.