WO2020012915A1

WO2020012915A1 - Shock absorber support device and suspension device

Info

Publication number: WO2020012915A1
Application number: PCT/JP2019/024651
Authority: WO
Inventors: 公昭牧野
Original assignee: Ｋｙｂモーターサイクルサスペンション株式会社
Priority date: 2018-07-12
Filing date: 2019-06-21
Publication date: 2020-01-16
Also published as: TWI813717B; JP2020006907A; TW202005865A; JP7137382B2; DE112019003548T5

Abstract

The purpose of the invention is to provide a shock absorber support device that can reduce the press-fitting load of a steering shaft while providing a tightening allowance capable of ensuring a steering shaft extraction load and a suspension device equipped with the shock absorber support device. The shock absorber support device comprises a steering shaft (2) and a bracket (1) that is formed with an insertion hole (3) into which the steering shaft (2) is press-fitted and that is connected to a shock absorber, and a plurality of press-fitting areas where the steering shaft (2) is press-fitted into the bracket (1) are arranged in the axial direction.

Description

Buffer support device and suspension device

The present invention relates to a shock absorber support device and a suspension device provided with the shock absorber support device.

BACKGROUND ART Conventionally, a suspension device for a front wheel in a saddle-ride type vehicle includes a shock absorber supporting a front wheel, a shock absorber support device for supporting the shock absorber, a bracket connected to the shock absorber, A steering shaft fixed to the bracket. When the steering wheel is rotated, the entire suspension device rotates around the steering shaft to change the direction of the front wheels.

緩衝 Further, as disclosed in JP0909480A, for example, there is a shock absorber supporting device in which an insertion hole is formed in a bracket, and a steering shaft is press-fitted into the insertion hole and fixed. In such a case, there is only one press-fitting point between the steering shaft and the bracket (for example, Patent Document 1).

Here, depending on the type of vehicle, there is a case where it is desired to increase the thickness of the bracket to increase the fitting length between the steering shaft and the bracket and increase the thickness of the steering shaft from the viewpoint of securing the strength. In such a case, if there is only one press-fitting location between the steering shaft and the bracket as in the conventional case, the axial length of the press-fitting location becomes the fitting length as it is, so the circumferential length of the press-fitting location and the axial direction Both lengths are longer.

Then, the press-fit load of the steering shaft (the load required to press-fit the steering shaft into the insertion hole) becomes extremely large. If the press-fitting load of the steering shaft becomes too large, the conventional press-fitting equipment cannot cope with it, and it is necessary to introduce a large-sized press-fitting equipment.

対策 As a countermeasure for this, there is a method of reducing the interference (press-fit allowance) at the press-fitting point between the steering shaft and the bracket. However, there is a limit to reducing the interference in order to secure the load of the steering shaft coming off when the vehicle is running (the load required to pull out the steering shaft from the insertion hole). Sometimes it cannot be reduced.

Therefore, an object of the present invention is to provide a shock absorber support device and a suspension device that can sufficiently reduce the press-fit load of the steering shaft while securing the interference.

The shock absorber support device that solves the above problem includes a steering shaft and a bracket having an insertion hole into which the steering shaft is press-fitted and connected to the shock absorber. A plurality of press-fitting locations for the steering shaft and the bracket are provided in the axial direction.

FIG. 1 is a simplified side view showing an attached state of a suspension device provided with a shock absorber support device according to an embodiment of the present invention. FIG. 2 is an enlarged longitudinal sectional view showing a part of the shock absorber support device according to one embodiment of the present invention. FIG. 3 is a vertical cross-sectional view showing a state of the shock absorber support device shown in FIG. 2 at the start of press-fitting of the steering shaft. FIG. 4 is a longitudinal sectional view showing a first modified example of the shock absorber support device according to the embodiment of the present invention, and showing a part of the shock absorber support device according to the modified example in an enlarged manner. FIG. 5 is a longitudinal sectional view showing a second modification of the shock absorber support device according to the embodiment of the present invention, and showing a part of the shock absorber support device according to the modification in an enlarged manner.

Hereinafter, a shock absorber support device according to an embodiment of the present invention will be described with reference to the drawings. Like reference numerals throughout the several figures indicate the same parts (parts) or corresponding parts (parts).

As shown in FIG. 1, a shock absorber support device A according to one embodiment of the present invention is used for a suspension device S for a front wheel W in a saddle type vehicle, and the suspension device S is rotated by operating a steering wheel. Then, the direction of the front wheel W is changed. In the following description, up and down in a state where the suspension device S is attached to the vehicle will be simply referred to as “up” and “down” unless otherwise specified.

More specifically, the suspension device S includes a pair of shock absorbers D, D arranged in the traveling direction of the saddle-ride type vehicle, and a wheel-side bracket B connecting the lower ends of the shock absorbers D, D to the axle of the front wheel W. And a bracket 1 on the vehicle body side connected to the upper ends of the pair of shock absorbers D, D, and a steering shaft 2 projecting upward from the bracket 1.

部分 In such a suspension device S, a portion including the bracket 1 and the steering shaft 2 on the vehicle body side is the shock absorber support device A. The upper ends of the shock absorbers D, D are supported by the shock absorber support device A, and the shock absorbers D, D support the front wheels W via brackets B on the wheel side.

ステアリング The steering shaft 2 is rotatably supported by the vehicle body. When the steering wheel is rotated, the entire suspension S rotates around the steering shaft 2. At this time, the front wheel W rotates together with the suspension device S, and the direction of the front wheel W changes. Further, when the front wheel W vibrates up and down, for example, when the saddle-ride type vehicle travels on an uneven road surface, the shock absorbers D, D expand and contract, preventing the shock due to the road surface unevenness from being transmitted to the vehicle body as it is.

Each buffer D may have any configuration. For example, the shock absorbers D, D shown in FIG. 1 include an outer tube OT and an inner tube IT slidably inserted into the outer tube OT, the outer tube OT being a vehicle body, and the inner tube IT being an axle. It is connected to. However, the inner tube IT may be connected to the vehicle body, and the outer tube OT may be connected to the axle.

Further, each of the shock absorbers D and D may be a shock absorber using only a spring such as a coil spring or an air spring, or a hydraulic shock absorber using the resistance of a fluid such as hydraulic oil. It may be a shock absorber that uses the resistance of the fluid. Further, one of the pair of shock absorbers D, D may be replaced with a guide or the like having no shock absorbing action.

配置 The arrangement of the shock absorber D can be changed as appropriate. For example, the suspension device S shown in FIG. 1 is of a cantilever type, in which a pair of shock absorbers D, D are arranged on one side of the front wheel W in the rotation axis direction. May be arranged on both sides in the rotation axis direction. Further, the upper ends of the pair of shock absorbers D, D may protrude upward from the bracket 1, and an upper bracket for connecting the upper ends of the shock absorbers D, D may be provided above the bracket 1.

A cantilever type suspension device S as shown in FIG. 1 is used, for example, in a three-wheeled motorcycle having two front wheels and one rear wheel (reverse trike). This is not the case. Specifically, a saddle-ride type vehicle refers to all types of vehicles that ride in a posture that straddles a saddle, such as a two-wheeled motorcycle, a one-wheeled front wheel, a three-wheeled motorcycle with two rear wheels (trike), a scooter, a buggy, and the like. Is included. The shock absorber support device and the suspension device including the same according to the present invention may be mounted on any straddle-type vehicle.

Subsequently, in the present embodiment, the bracket 1 on the vehicle body side includes a pair of annular grip portions 10. A cut (not shown) is formed in each of the grips 10, and when the split is widened, the diameter of the grip 10 is increased, and when the split is narrowed, the grip 10 is reduced in diameter. The interval between the cuts can be adjusted by bolts 11. When the upper end of the shock absorber D is inserted into the grip portion 10 and then the cut is narrowed by the bolt 11, the upper end of the shock absorber D is Tightened.

As described above, in the present embodiment, the upper end of the shock absorber D is fastened by the grip portion 10 to connect the shock absorber D to the bracket 1. That is, in the bracket 1 according to the present embodiment, the grip portion 10 functions as a connecting portion for connecting the shock absorber D. However, the configuration of the connecting portion is not limited to the grip portion 10 and can be freely changed according to the shock absorber D connected to the bracket 1.

As shown in FIG. 2, an insertion hole 3 that penetrates the thickness of the bracket 1 is formed in a portion other than the grip portion (connection portion) 10 of the bracket 1 on the vehicle body side. In the present embodiment, the bracket 1 is made of aluminum and the steering shaft 2 is made of iron, and the steering shaft 2 is pressed into the insertion hole 3 of the bracket 1 and fixed.

More specifically, the insertion hole 3 of the bracket 1 includes a small hole portion 3a and a large hole portion 3b having different diameters connected in the axial direction, and the diameter of the large hole portion 3b is larger than the diameter of the small hole portion 3a. Further, in the present embodiment, the lower end of the insertion hole 3 is an entrance (hereinafter simply referred to as “entrance”) when the steering shaft 2 is press-fitted, and the large hole 3b is on the entrance side of the small hole 3a.

Furthermore, the entrance side of the insertion hole 3 from the large hole portion 3b is an introduction portion 3c, and the diameter of the introduction portion 3c is larger than the diameter of the large hole portion 3b. A boundary portion between the introduction portion 3c and the large hole portion 3b on the peripheral wall of the insertion hole 3 is an abutment portion 3d against which a stop ring 9 described below abuts.

On the other hand, in the state where the shock absorber support device A is completed (after assembly), the steering shaft 2 is connected to the main body 2a projecting upward from the upper end of the insertion hole 3 and to the lower end of the main body 2a. And an insertion portion 2b to be inserted. The insertion portion 2b includes a small-diameter portion 4, a middle-diameter portion 5, and a large-diameter portion 6 having different outer diameters connected in the axial direction. The outer diameter of the middle-diameter portion 5 is larger than the outer diameter of the small-diameter portion 4. The outer diameter of the diameter part 6 is even larger than the outer diameter of the middle diameter part 5.

端 When inserting the steering shaft 2 into the insertion hole 3, the end on the insertion start side is the insertion end, and the end on the opposite side is the insertion end. Then, in the present embodiment, the steering shaft 2 is inserted into the insertion hole 3 from the main body 2a side, and the upper end of the steering shaft 2 becomes the insertion tip, and the lower end of the steering shaft 2 becomes the insertion end. I have.

中 In such a steering shaft 2, the middle diameter portion 5 is located at the insertion end side of the small diameter portion 4, and is located between the small diameter portion 4 and the main body 2a. The outer diameters of the main body portion 2a and the small diameter portion 4 are smaller than the diameter of the small hole portion 3a which is the smallest diameter portion in the insertion hole 3. On the other hand, the outer diameter of the middle diameter portion 5 is smaller than the diameter of the large hole portion 3b but slightly larger than the diameter of the small hole portion 3a, and the small hole portion 3a has a predetermined interference with the middle diameter portion 5. .

The large-diameter portion 6 is located on the insertion end side of the small-diameter portion 4, and has an outer diameter larger than the small-diameter portion 4 between the small-diameter portion 4 and the large-diameter portion 6. A guide portion 7 smaller than the outer diameter is provided. The guide portion 7 has an outer diameter that corresponds to the large hole 3b. On the other hand, the outer diameter of the large diameter portion 6 is slightly larger than the diameter of the large hole portion 3b, and the large hole portion 3b has a predetermined interference with the large diameter portion 6.

In this embodiment, the interference means that when a shaft is press-fitted into a hole (hole), the diameter of the outer periphery of the shaft before press-fitting (hereinafter, simply referred to as “shaft diameter”) is larger than the diameter of the hole before press-fitting. It is a large value obtained by subtracting the diameter of the hole before press-fitting from the diameter of the shaft before press-fitting. The interference for the medium diameter portion 5 of the small hole portion 3a and the interference for the large diameter portion 6 of the large hole portion 3b can be set arbitrarily, but are set to be equal in the present embodiment. . The fact that the interferences are equal is not limited to the exact same, but is a concept that allows manufacturing errors.

According to the above configuration, two portions of the contact portion between the middle diameter portion 5 and the peripheral wall of the small hole portion 3a and the contact portion between the large diameter portion 6 and the peripheral wall of the large hole portion 3b are formed between the steering shaft 2 and the bracket 1. It becomes a press-fitting point. These press-fitted portions are separated vertically (in the axial direction), and spaces between them are non-press-fitted portions.

Further, in the present embodiment, the axial length of the upper press-fitting portion (the contact portion between the middle diameter portion 5 and the peripheral wall of the small hole portion 3a) located on the body portion 2a side of the steering shaft 2 is the lower side. It is slightly longer than the axial length of the press-fit portion (the contact portion between the large diameter portion 6 and the peripheral wall of the large hole portion 3b). For this reason, when a lateral force acts on the main body 2a, it is advantageous in securing strength against the lateral force. However, the axial length of each press-fitting point can be set freely.

Further, the axial length of the large hole portion 3b is longer than the axial length of the medium diameter portion 5 and the small diameter portion 4 combined, and the axial length of the large diameter portion 5, the small diameter portion 4 and the guide portion 7 combined. Shorter than that. Therefore, as shown in FIG. 3, when the upper end of the middle diameter portion 5 reaches the lower end of the small hole portion 3a, the guide portion 7 is fitted into the large hole portion 3b, but the large diameter portion 6 It is outside the large hole 3b.

制限 Further, a restricting portion 8 is provided at the insertion end side of the large diameter portion 6 in the steering shaft 2. An annular groove 8a (FIG. 2) is formed on the outer periphery of the limiting portion 8 along the circumferential direction, and the stop ring 9 is fitted into the annular groove 8a. When the stop ring 9 is mounted on the steering shaft 2, the outer diameter of the stop ring 9 is larger than the outer diameter of the large diameter portion 6.

Hereinafter, an assembly process of the bracket 1 and the steering shaft 2 in the shock absorber support device A according to the present embodiment will be described.

The steering shaft 2 is inserted into the insertion hole 3 from the main body 2a, and proceeds upward in the insertion hole 3. In the steering shaft 2, the main body 2 a first inserted into the insertion hole 3 passes through the insertion hole 3 with relatively little resistance.

On the other hand, the middle diameter portion 5 inserted into the insertion hole 3 following the main body portion 2a passes through the large hole portion 3b with relatively little resistance, but when it reaches the small hole portion 3a, it receives a press-in resistance. . Also, the large diameter portion 6 approaches the large hole portion 3b as the medium diameter portion 5 approaches the small hole portion 3a, and receives the press-in resistance when reaching the large hole portion 3b.

In the press-fitting process in which the steering shaft 2 receives the press-fit resistance, it is necessary to push the steering shaft 2 into the insertion hole 3 while applying a high load (press-fit load). Then, as shown in FIG. 3, when the middle diameter portion 5 reaches the small hole portion 3a, that is, when the press-fitting of the steering shaft 2 is started, the large diameter portion 6 is outside the large hole portion 3b. For this reason, in the initial stage of the press-fitting step, only the middle-diameter portion 5 is press-fitted, and both the middle-diameter portion 5 and the large-diameter portion 6 are press-fitted during the press-fitting process.

Furthermore, as shown in FIG. 3, when the middle diameter portion 5 reaches the small hole portion 3a, the guide portion 7 is fitted into the large hole portion 3b. Therefore, even when the large-diameter portion 6 is press-fitted with a delay to the middle-diameter portion 5, the axis of the steering shaft 2 is inclined with respect to the axis of the insertion hole 3 in the process of press-fitting only the middle-diameter portion 5. This is prevented by the guide portion 7 to prevent the occurrence of galling between the middle diameter portion 5 and the peripheral wall of the small hole portion 3a.

When the steering shaft 2 is further pressed into the insertion hole 3, the stop ring 9 collides with the abutting portion 3 d, and further upward movement of the steering shaft 2 in the insertion hole 3 is prevented. . Thus, the press-fitting step is completed, and the assembly of the steering shaft 2 and the bracket 1 is completed.

Hereinafter, the operation and effect of the shock absorber support device A according to one embodiment of the present invention and the suspension device S including the shock absorber support device A will be described.

The shock absorber support device A according to the present embodiment is used for a suspension device S, and the suspension device S includes a shock absorber D that supports a front wheel (wheel) W of a saddle-ride type vehicle (vehicle). The shock absorber D is supported by the shock absorber support device A.

The shock absorber support device A further includes a steering shaft 2 and a bracket 1 having an insertion hole 3 into which the steering shaft 2 is press-fitted and connected to the shock absorber D. Then, two press-fitting locations of the steering shaft 2 and the bracket 1 are provided in the axial direction. As described above, in the present embodiment, the press-fit portion of the steering shaft 2 and the bracket 1 is bisected in the axial direction, and a non-press-fit portion is formed therebetween.

Here, for the purpose of securing strength, a case is considered in which the thickness of the bracket 1 is increased to increase the fitting length between the steering shaft 2 and the bracket 1 and the steering shaft 2 is made thicker.

場合 When the steering shaft and the bracket are press-fitted in one place as in the conventional case, the axial length of the press-fitted portion becomes the fitting length as it is. For this reason, when the fitting length is increased, the axial length of the press-fitted portion is increased. Further, the circumferential length of the press-fitting portion also increases. As described above, when both the axial length and the circumferential length of the press-fitting portion are long, the press-fitting load becomes extremely large. Then, the press-fitting load cannot be sufficiently reduced only by adjusting the interference of the press-fitting portion, and the conventional equipment may not be able to assemble the steering shaft and the bracket.

On the other hand, when there are a plurality of press-fit locations in the axial direction of the steering shaft 2 and the bracket 1 and there is a non-press-fit location between the press-fit locations as in the present embodiment, the fitting length becomes longer. Thus, the axial length of the entire press-fitting portion can be reduced. Specifically, in the present embodiment, there are two press-fitting points at the top and bottom, and the contact part between the middle diameter part 5 and the peripheral wall of the small hole part 3a is the upper press-fitting part, and the large diameter part 6 and the large hole part 3b are The contact portion with the peripheral wall is the lower press-fitting point.

The fitting length between the steering shaft 2 and the bracket 1 in the present embodiment is the length from the upper end of the upper press-fitting point to the lower end of the lower press-fitting point. Is the sum of the axial lengths of the press-fitted portions. In other words, in the present embodiment, the entire length of the press-fitted portion in the axial direction is shorter than the fitting length by the amount of the non-press-fitted portion between the upper and lower press-fitted portions.

As described above, according to the configuration of the present embodiment, even if the circumferential length of the press-fitted portion between the steering shaft 2 and the bracket 1 is increased, the axial length of the press-fitted portion is prevented from increasing. Therefore, the press-fit load can be sufficiently reduced while securing the interference at the press-fit portion. For this reason, it is possible to assemble the steering shaft 2 and the bracket 1 with the conventional equipment.

In the present embodiment, the bracket 1 is made of aluminum and the steering shaft 2 is made of iron, and the linear expansion coefficient of the bracket 1 is larger than the linear expansion coefficient of the steering shaft 2. For this reason, when the shock absorber support device A is warmed during traveling of the vehicle, the interference is reduced. In such a case, it is difficult to reduce the interference in order to secure the load of the steering shaft 2 coming off when the vehicle is running, and it is extremely difficult to reduce the press-fit load of the steering shaft 2 by adjusting the interference.

For this reason, when the linear expansion coefficient of the bracket 1 is larger than the linear expansion coefficient of the steering shaft 2, not only the bracket 1 is made of aluminum and the steering shaft 2 is made of iron, but the press-fit load is adjusted by adjusting the interference. It is extremely difficult to reduce sufficiently. Therefore, in such a case, it is particularly effective to reduce the press-fitting load by providing a plurality of press-fit locations of the steering shaft 2 and the bracket 1 in the axial direction as in the present embodiment. However, the bracket 1 and the steering shaft 2 may be formed of the same material.

In the present embodiment, the steering shaft 2 has the large-diameter portion 6 and the middle-diameter portion 5 whose outer diameter is smaller than the outer diameter of the large-diameter portion 6. On the other hand, the insertion hole 3 into which the steering shaft 2 is inserted has a large hole 3b and a small hole 3a whose diameter is smaller than the diameter of the large hole 3b. 3b, and the middle diameter part 5 is pressed into the small hole part 3a.

According to this configuration, since the middle diameter portion 5 can easily pass through the inside of the large hole portion 3b, the press-fit stroke when assembling the steering shaft 2 and the bracket 1 can be shortened and the press-fit time can be shortened. Further, even if the middle diameter portion 5 passes through the inside of the large hole portion 3b, the diameter of the large hole portion 3b is increased, or the middle diameter portion 5 is strongly rubbed against the peripheral wall of the large hole portion 3b, and the surface of the peripheral wall is thus damaged. Since the state does not change, the conditions for press-fitting the large diameter portion 6 into the large hole portion 3b can be stabilized.

Further, in the present embodiment, the steering shaft 2 is provided between the large diameter portion 6 and the middle diameter portion 5 and the small diameter portion 4 having an outer diameter smaller than the outer diameters of the large diameter portion 6 and the middle diameter portion 5. Have. According to this configuration, the small-diameter portion 4 is not press-fitted at any stage of the press-fitting step, so that the processing accuracy of the small-diameter portion 4 can be reduced. Therefore, machining of the steering shaft 2 can be facilitated.

Further, in this embodiment, the steering shaft 2 is provided between the small diameter portion 4 and the large diameter portion 6, and the outer diameter is larger than the outer diameter of the small diameter portion 4 and smaller than the outer diameter of the large diameter portion 6. It has a part 7. According to this configuration, even when the large diameter portion 6 is press-fitted after the middle diameter portion 5, the guide portion 7 is inserted into the large hole portion 3 b at the start of press-fitting of the middle diameter portion 5. By doing so, it is possible to prevent the steering shaft 2 from inclining with respect to the insertion hole 3.

In order to stabilize the press-fitting load, it is preferable that the upper and lower press-fitting portions have shorter axial lengths, but these lengths can be appropriately changed. Further, the outer diameter of the guide portion 7 can be appropriately changed within a range larger than the outer diameter of the small diameter portion 4 and smaller than the outer diameter of the large diameter portion 6. Further, the guide portion 7 itself may be omitted.

小 Alternatively, the small diameter portion 4 may be abolished and the middle diameter portion 5 may be extended, and the middle diameter portion 5 may be directly connected to the guide portion 7 or the large diameter portion 6. When the middle diameter portion 5 is continuous with the guide portion 7, the outer diameter of the guide portion 7 can be appropriately changed within a range larger than the outer diameter of the middle diameter portion 5 and smaller than the outer diameter of the large diameter portion 6. .

In the present embodiment, the contact portion between the middle diameter portion 5 and the peripheral wall of the small hole portion 3a is the upper press-fitting portion, and the contact portion between the large diameter portion 6 and the peripheral wall of the large hole portion 3b is the lower press-fitting portion. The diameter of the shaft at the press-fitting point and the diameter of the hole are different at the top and bottom. However, as long as there are a plurality of press-fit locations of the steering shaft 2 and the bracket 1 in the axial direction and non-press-fit locations are formed between the press-fit locations, the number of press-fit locations and the structure of the press-fit locations can be changed as appropriate. .

For example, as in a shock absorber support device A1 according to a first modification shown in FIG. 4, the steering shaft 2A includes first and second

large diameter portions

60 and 61 and first and second large diameter portions 60. , 61 provided with a small diameter portion 40 having an outer diameter smaller than the outer diameter of the first and second

large diameter portions

60, 61, and the first and second

large diameter portions

60, 61 are provided. Each of the insertion holes 3A formed in the bracket 1A may be press-fitted into a portion 3e having the same inner diameter. Here, the term “identical” is not limited to completely identical, but is a concept that allows a manufacturing error.

According to the above configuration, the contact portions between the first and second large-

diameter portions

60 and 61 and the peripheral wall of the insertion hole 3A are upper and lower press-fit portions, respectively, and a non-press-fit portion is formed by the small-diameter portion 40 therebetween. You. In this case, the large-diameter portion that is arranged to be separated from the other large-diameter portion may be increased so that the number of press-fitted portions may be three or more, and the outer diameter between the vertically adjacent large-diameter portions is larger than the outer diameter of the large-diameter portion. One or more guide portions that are smaller and larger than the outer diameter of the small diameter portion may be provided.

Also, as in the shock absorber support device A2 according to the second modification shown in FIG. 5, the insertion holes 3B formed in the bracket 1B are the first and second

small holes

3f and 3g, and the first and second small holes. A large hole portion 3h provided between the two

small hole portions

3f, 3g and having a diameter larger than the diameter of the first and second

small hole portions

3f, 3g, and the outer diameter of the steering shaft 2B is the same. The insertion portion 2c may be press-fitted into the first and second

small holes

3f and 3g, respectively. Note that the term “identity” here is not limited to exactly the same, but is a concept that allows manufacturing errors.

According to the above configuration, the contact portions between the steering shaft 2B and the peripheral walls of the first and second

small holes

3f and 3g are upper and lower press-fit portions, respectively, and a non-press-fit portion is formed therebetween by the large hole 3h. Is done. In this case, the number of press-fitted portions may be increased to three or more by increasing the number of small holes spaced apart from the other small holes, and the diameter of the large hole between the vertically adjacent small holes is larger than the diameter of the small hole. One or more guide holes smaller than the diameter of the portion may be provided.

As described above, according to the shock absorber supporting devices A1 and A2 according to the first and second modified examples shown in FIGS. 4 and 5, a plurality of press-fit locations of the

steering shafts

2A and 2B and the

brackets

1A and 1B are provided in the axial direction. Can be easily realized, and the number of press-fit locations can be easily increased or decreased.

As described above, the preferred embodiments of the present invention have been described in detail, but modifications, variations, and changes can be made without departing from the scope of the claims.

Claims

A shock absorber support device,
A steering shaft,
A bracket formed with an insertion hole into which the steering shaft is press-fitted and connected to the shock absorber,
A shock absorber support device in which a plurality of press-fit locations of the steering shaft and the bracket are provided in the axial direction.
The shock absorber support device according to claim 1,
The steering shaft is provided between the first and second large-diameter portions and the first and second large-diameter portions, and has an outer diameter greater than the outer diameter of the first and second large-diameter portions. With a small small diameter part,
The shock absorber support device wherein the first and second large diameter portions are press-fitted into the insertion holes.
The shock absorber support device according to claim 1, wherein
The insertion hole is provided between the first and second small holes and the first and second small holes, and has a larger diameter than the diameter of the first and second small holes. And a hole,
The shock absorber support device, wherein the steering shaft is press-fitted into the first and second small holes.
The shock absorber support device according to claim 1,
The steering shaft has a large diameter portion and a middle diameter portion whose outer diameter is smaller than the outer diameter of the large diameter portion,
The insertion hole has a large hole and a small hole whose diameter is smaller than the diameter of the large hole,
The large diameter portion is press-fitted into the large hole portion,
The buffer support device, wherein the middle diameter portion is press-fitted into the small hole portion.
The shock absorber support device according to claim 4, wherein
The steering shaft has a small-diameter portion provided between the large-diameter portion and the middle-diameter portion and having an outer diameter smaller than the outer diameters of the large-diameter portion and the middle-diameter portion. .
The shock absorber support device according to claim 5, wherein
The steering shaft has a guide portion provided between the small diameter portion and the large diameter portion and having an outer diameter larger than the outer diameter of the small diameter portion and smaller than the outer diameter of the large diameter portion. Vessel support device.
The shock absorber support device according to claim 4, wherein
The steering shaft has a guide portion provided between the large-diameter portion and the medium-diameter portion and having an outer diameter larger than the outer diameter of the middle-diameter portion and smaller than the outer diameter of the large-diameter portion. There is a shock absorber support device.
The shock absorber support device according to claim 1,
The shock absorber support device, wherein a linear expansion coefficient of the bracket is larger than a linear expansion coefficient of the steering shaft.
A suspension device,
A shock absorber for supporting a vehicle wheel;
A shock absorber support device according to claim 1,
A suspension device, wherein the shock absorber is supported by the shock absorber support device.