JPH0632729U - Pillow ball bush - Google Patents

Abstract

(57) [Summary] [Purpose] Even when a thrust load in any direction is applied to the housing 15, the displacement amounts of the housing 15 and the support cylinder 3 are made equal. [Construction] The housing 15 is composed of a main portion 17 and a sub portion 18 firmly connected to the main portion 17. A sleeve 24 composed of a first half piece 22 and a second half piece 23 is sandwiched between the receiving surface 16 of the inner peripheral surface of the housing 15 and the sliding portion 4 of the intermediate portion of the support cylinder 3. The first half piece 22 and the second half piece 23 have an axially symmetrical shape, and a rubber ring 25 as an elastic material is sandwiched between the end edges of the two half pieces 22 and 23.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The pillow ball bush according to the present invention is used for a portion for fixing an end portion of a rod forming a suspension of an automobile to a vehicle body, and supports the rod with respect to the vehicle body while being displaced.

[0002]

[Prior art]

 When supporting a rod that constitutes an independent suspension type suspension of an automobile on a vehicle body, the rod is allowed to rotate in a specific direction and slightly displaceable in the other direction. For this reason, conventionally, as shown in FIG. 3, a pillow ball bush 2 is provided at the end of the rod 1, and the rod 1 and the vehicle body are connected via the pillow ball bush 2.

FIG. 4 shows a conventional pillow ball bush used in such a portion. The hollow cylindrical support cylinder 3 is supported and fixed to the vehicle body by bolts 4 (FIG. 3). On the outer peripheral surface of the intermediate portion of the support cylinder 3, a sliding portion 4 having an outer peripheral surface having a spherical convex surface is formed so as to project from the outer peripheral surface of the intermediate portion. A cylindrical housing 5 is provided around the support cylinder 3, and the inner peripheral surface of the housing 5 and the outer peripheral surface of the sliding portion 4 are opposed to each other. The outer peripheral surface of the housing 5 is joined and fixed to the end portion of the rod 1 by welding or the like.

A receiving surface 6 is formed on the inner peripheral surface of the middle portion of the housing 5. One half of the receiving surface 6 (right half in FIG. 4) is a spherical concave surface 7, and the other half (left half in FIG. 4) is a cylindrical surface 8. A sleeve 9 made of a slippery material such as polytetrafluoroethylene, nylon, delrin, polyamide, or polyacetal is fitted inside the receiving surface 6, and the sleeve 9 is attached to the receiving surface 6 and the above-mentioned receiving surface 6. It is tightly sandwiched between the outer peripheral surface of the sliding portion 4 and the sliding portion 4. The inner peripheral surface of the sleeve 9 is a spherical concave surface that is in close contact with the outer peripheral surface of the sliding portion 4, and a step portion 10 is formed on the outer peripheral surface at one end (the left end in FIG. 4) over the entire circumference.

Further, a retaining ring 11 is caulked and fixed to an opening of one end of the housing 5. A cushioning material 12 is sandwiched between the inner surface of the restraining ring 11 (the right side surface in FIG. 4) and the step portion 10, and the sleeve 9 holds the sleeve 9 on the spherical concave surface 7 side of the receiving surface 6 (the right side in FIG. 4). Side). Further, rubber dustproof boots 13, 13 are laid between the outer peripheral surfaces of both ends of the support cylinder 3 and both end surfaces of the housing 5 to prevent dust and rainwater from entering the sliding displacement portion. ing.

When the housing 5 of the pillow ball bush 2 configured as described above is welded and fixed to the end portion of the rod 1 as shown in FIG. 3 and the support cylinder 3 is fixed to the vehicle body by the bolt 14, The swinging of 1 around the bolt 14 is freely allowed by the sliding portion 4 in the middle portion of the support cylinder 3 rotating inside the sleeve 9. A slight displacement of the rod 1 in the torsional direction is allowed by the displacement of the sliding portion 4 inside the sleeve 9 in the direction of arrow a in FIG.

When a force in the direction of arrow b in FIG. 3 is applied to the rod 1 and the housing 5 tends to be displaced in the axial direction with respect to the support cylinder 3, when a force in the thrust direction is applied to the housing 5, , Through the sleeve 9 (when the housing 5 tends to be displaced to the left in FIG. 4), or through the sleeve 9, the cushion material 12, and the retaining ring 11 (when the same tends to be displaced to the right). ), The support cylinder 3 bears the force in the thrust direction.

[0008]

[Problems to be solved by the device]

 The pillow ball bush of the present invention makes the amount of displacement of the housing 5 relative to the support cylinder 3 even when a thrust load in any direction is applied to the housing 5, so that a suspension device incorporating the pillow ball bush can be used. It is intended to improve performance.

In the case of the conventional structure shown in FIG. 4, when a left thrust load is applied to the housing 5 in the same figure, the support cylinder 3 supports this load via the sleeve 9, but in FIG. When a thrust load in the right direction is applied, the support cylinder 3 supports this load via the sleeve 9, the cushion material 12, and the retaining ring 11. Of these, the cushion material 12 is compressed and deformed when a large thrust load is applied. Therefore, the displacement amount of the housing 5 with respect to the support cylinder 3 when a thrust load in the right direction in FIG. Is larger than the displacement when a left thrust load is applied. That is, the displacement amount based on the thrust load varies depending on the direction of the load, as shown in FIG. In other words, the characteristics with respect to the thrust load will be asymmetric.

In this way, the pillow ball bush 2 having asymmetrical characteristics does not meet the designed performance of the suspension system in which the pillow ball bush 2 is incorporated unless the assembly direction is properly regulated, and further, the suspension is properly assembled. Even in such a case, problems such as not being able to obtain sufficient rigidity are likely to occur due to changes in the vehicle attitude.

The pillow ball bush of the present invention was devised in view of the above circumstances.

[0012]

[Means for Solving the Problems]

 The pillow ball bush of the present invention, like the conventional pillow ball bush described above, has a hollow cylindrical support cylinder and an outer peripheral surface formed on the outer peripheral surface of the intermediate portion of the support cylinder so as to project from the outer peripheral surface. A sliding part having a spherical convex surface, a cylindrical housing provided around the supporting cylinder at a portion facing the outer peripheral surface of the sliding part, and an inner peripheral surface of an intermediate part of the housing. It is provided with a receiving surface and a sleeve made of a slippery material and sandwiched between the receiving surface and the outer peripheral surface of the sliding portion.

Particularly, in the pillow ball bush of the present invention, the housing has a main part having one half of the receiving surface and another half of the receiving surface, and is internally fitted and fixed to the main part. It consists of a sub-part. The sleeve is composed of a first half piece fitted and supported on the inner peripheral surface of the main portion and a second half piece fitted and supported on the sub portion. Further, the first half piece and the second half piece have a symmetrical shape with respect to the center of the sliding portion, and the edge of the first half piece and the edge of the second half piece have an elastic material therebetween. It is characterized by being matched.

[0014]

[Action]

 In the pillow ball bushing of the present invention constructed as described above, the displacement amount of the housing and the support cylinder becomes equal no matter which direction the thrust load is applied to the housing.

[0015]

【Example】

 FIG. 1 shows an embodiment of the present invention. On the outer peripheral surface of the intermediate portion of the hollow cylindrical support cylinder 3, a sliding portion 4 having a spherical convex outer peripheral surface is formed so as to project from the outer peripheral surface of the intermediate portion. A cylindrical housing 15 is provided around the support cylinder 3, and a receiving surface 16 which is a spherical concave surface formed on the inner peripheral surface of the housing 15 and an outer peripheral surface of the sliding portion 4 are opposed to each other. There is.

The housing 15 includes a main portion 17 having one half portion 16a (right half portion of FIG. 1) of the receiving surface 16 and another half portion 16b (left half portion of FIG. 1) of the receiving surface 16. The main portion 17 is provided with a sub portion 18 which is fitted and fixed. That is, the inner peripheral surface of the other half of the housing 15 is a cylindrical surface portion 19 having a larger diameter than the receiving surface 16, and the sub portion 18 is fitted inside the cylindrical surface portion 19. The protrusion 20 formed on the outer peripheral surface of the sub portion 18 is held down by the caulking portion 21 formed at the opening edge portion of the housing 5 to prevent the sub portion 18 from coming off from the cylindrical surface portion 19. I am trying.

A sleeve 24 composed of a first half piece 22 and a second half piece 23 is sandwiched between the outer peripheral surface of the sliding portion 4 and the receiving surface 16 of the inner peripheral surface of the housing 15. There is. The first half piece 22 is fitted and supported by the half piece 16a of the receiving surface 16 provided on the inner peripheral surface of the main portion 17, and the second half piece 23 is provided on the inner peripheral surface of the sub portion 18. The other half 16b of the receiving surface 16 is internally fitted and supported.

As the first half piece 22 and the second half piece 23, those having the same shape are used in opposite directions. That is, the two halves 22 and 23 are symmetrical with respect to the center of the sliding portion 4. The end edge of the first half piece 22 and the end edge of the second half piece 23 are butted against each other via an elastic material such as a rubber ring 25. The rubber ring 25 prevents rattling of the two half pieces 22 and 23. Instead of the rubber ring 25, a ring made of an elastic material such as polyester or polyurethane can be used.

In the pillow ball bush of the present invention configured as described above, the displacement amount of the housing 15 and the support cylinder 3 becomes equal no matter which direction the thrust load is applied to the housing 15. .

That is, when the pillow ball bush is used, the end portion of the rod 1 (FIG. 3) is fixed to the outer peripheral surface of the main portion 17 forming the housing 15 by welding or the like. In this state, when a thrust load is applied to the housing 15 via the rod 1 in the left direction in FIG. 1, the first half piece 22 moves between the sliding portion 4 and the half portion 16a of the receiving surface 16. It is strongly clamped and receives this thrust load. On the contrary, when a thrust load is applied to the housing 15 in the right direction in FIG. 1, the second half piece 23 is strongly clamped between the sliding portion 4 and the other half portion 16b of the receiving surface 16, and Receive thrust load.

The thrust load applied to the second half piece 23 is supported by the main portion 17 via the sub portion 18, but the sub portion 18 and the main portion 17 are almost immovably coupled to each other. Therefore, as shown in FIG. 2, even if the thrust load in any direction is applied to the housing 15, the displacement amount between the housing 15 and the support cylinder 3 becomes equal. Other configurations and actions are the same as those of the conventional pillow ball bush described above, and therefore, redundant description will be omitted.

[0022]

EFFECTS OF THE INVENTION Since the pillow ball bushing of the present invention is constructed and operates as described above, it is not necessary to consider the directionality when assembling it into the suspension device, and the assembly workability of the suspension device is improved. To do. Further, the rigidity of the suspension device incorporating the pillow ball bush is improved, and the dynamic performance of the automobile can be enhanced.

[Brief description of drawings]

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

FIG. 2 is a diagram showing the characteristics of the pillow ball bush of the present invention.

FIG. 3 is a perspective view showing a usage state of a pillow ball bush.

FIG. 4 is a sectional view showing a conventional pillow ball bush.

FIG. 5 is a diagram showing characteristics of a conventional pillow ball bush.

[Explanation of Codes] 1 Rod 2 Pillow ball bush 3 Support tube 4 Sliding part 5 Housing 6 Receiving surface 7 Spherical concave surface 8 Cylindrical surface 9 Sleeve 10 Step 11 Holding ring 12 Cushion material 13 Dustproof boot 14 Bolt 15 Housing 16 Receiving surface 16a One half part 16b Other half part 17 Main part 18 Sub part 19 Cylindrical surface part 20 Projection 21 Caulking part 22 First half piece 23 Second half piece 24 Sleeve 25 Rubber ring

Claims (1)

[Scope of utility model registration request] 1. A hollow cylindrical support cylinder, a sliding portion formed on an outer peripheral surface of an intermediate portion of the support cylinder so as to project from the outer peripheral surface, and a sliding portion having a spherical convex surface. At a portion facing the outer peripheral surface of the cylindrical housing provided around the support cylinder, the receiving surface formed on the inner peripheral surface of the intermediate portion of the housing, and the receiving surface made of a slippery material. In a pillow ball bush including a sleeve sandwiched between the outer peripheral surface of the sliding portion and the housing, the housing includes a main portion having one half of the receiving surface and another half of the receiving surface. And a sub-part internally fitted and fixed to the main part, wherein the sleeve is internally fitted and supported by the first half piece and the sub-part that is fitted and supported by the inner peripheral surface of the main part. It is composed of a second half piece, and the first half piece and the second half piece have a symmetrical shape with respect to the center of the sliding portion. The pillow ball bush characterized in that the edge of the first half piece and the edge of the second half piece are butted against each other via an elastic material.