WO2019116875A1

WO2019116875A1 - Outer shell

Info

Publication number: WO2019116875A1
Application number: PCT/JP2018/043426
Authority: WO
Inventors: 晴樹脇坂; 龍一金兒; 知己早瀬
Original assignee: Ｋｙｂ株式会社
Priority date: 2017-12-14
Filing date: 2018-11-26
Publication date: 2019-06-20
Also published as: DE112018006440T5; JP2019105341A; JP6868542B2

Abstract

Provided is an outer shell with which weight reduction can be achieved while ensuring mechanical strength. This outer shell (1) is formed in a bottomed cylindrical shape that is open at one end thereof. The outer shell (1) is provided with a first attachment section (10) and a second attachment section (20). The first attachment section (10) is provided to an end section (1A) on a bottom section side, and has a knuckle bracket (40) attached to the outer circumferential surface thereof. The second attachment section (20) is provided further toward the opening side than the first attachment section (10), and has a spring seat (50) attached to the outer circumferential surface thereof. Moreover, the second attachment section (20) is formed to have a smaller thickness than the first attachment section (10).

Description

Outer shell

The present invention relates to an outer shell.

Patent Document 1 discloses a strut-type shock absorber. The strut type shock absorber is a shock absorber used for a strut type suspension, which is one form of a vehicle suspension system. A shock absorber is utilized as part of a link in a strut type suspension. For this reason, a knuckle bracket fixed to the axle side is fixed to the outer circumferential surface of the outer tube (outer tube) of the strut type shock absorber. Moreover, a spring seat (spring seat) supporting one end of a coil spring (coil spring) is fixed to the outer tube. The outer tube is required to have mechanical strength against the force acting on these brackets.

Japanese Patent Application Publication No. 2007-32775

By the way, weight reduction is required for parts for vehicles for the improvement of a fuel consumption etc. The weight reduction of the shock absorber is particularly effective because it can improve not only the weight but also the exercise performance. In this shock absorber, in order to reduce the weight of the outer tube, it is generally considered to reduce the plate thickness. However, simple thinning may lead to a decrease in mechanical strength.

The present invention has been made in view of the above-described conventional circumstances, and an object thereof is to provide an outer shell capable of achieving weight reduction while securing mechanical strength.

The outer shell of the present invention is formed in a bottomed cylindrical shape whose one end is open. The outer shell comprises a first mounting portion and a second mounting portion. The first attachment portion is provided at the end on the bottom side, and the knuckle bracket is attached to the outer peripheral surface. The second attachment portion is provided closer to the opening than the first attachment portion, and a spring seat is attached to the outer peripheral surface. The second mounting portion is formed thinner than the first mounting portion.

The outer shell of the present invention may comprise a third mounting portion. The third mounting portion is provided between the first mounting portion and the second mounting portion, and a stabilizer bracket is mounted on the outer peripheral surface. The third mounting portion is thinner than the first mounting portion and thicker than the second mounting portion.

In the outer shell of the present invention, the portion closer to the opening than the second attachment portion may be formed thinner than the second attachment portion.

In the outer shell of the present invention, a welding portion for fixing the knuckle bracket to the first mounting portion may be formed between the first mounting portion and the knuckle bracket. The plate thickness of the first attachment portion may be 0.5 or more times the plate thickness of the plate forming the knuckle bracket.

In the outer shell of the present invention, a welding portion may be formed between the second mounting portion and the spring seat to fix the spring seat to the second mounting portion. And the board thickness of the 2nd attaching part may be 0.5 times or more of the board thickness of the board material which forms a spring seat.

In the outer shell of the present invention, a welding portion may be formed between the third mounting portion and the stabilizer bracket, for fixing the stabilizer bracket to the third mounting portion. And the board thickness of the 3rd attaching part may be 0.5 times or more of the board thickness of the board material which forms a stabilizer bracket.

The outer shell of the present invention may be formed such that the outer diameter is constant and the inner diameter is gradually increased from the bottom end to the opening end.

2 is a cross-sectional view showing an outer shell according to Embodiment 1. FIG. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure (the 1) which shows a mouth narrowing process typically. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure (the 2) which shows a mouth narrowing process typically. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure (the 1) which shows an ironing and squeezing process typically. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure (the 2) which shows an ironing * squeezing process typically. FIG. 7 is a view schematically showing an intermediate shape of a work piece in the method of manufacturing the outer shell according to the first embodiment. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure which shows typically the state which cut | disconnected the end surface of the workpiece | work. It is a figure for demonstrating the manufacturing method of the outer shell which concerns on Embodiment 1, and is a figure which shows typically the state which obstruct | occluded the end of the workpiece | work.

Next, Embodiment 1 in which the outer shell of the present invention is embodied will be described with reference to the drawings.

First Embodiment
The outer shell 1 according to the first embodiment is an outer shell of a shock absorber in a strut type suspension system for a vehicle. As shown in FIG. 1, the outer shell 1 is formed in a bottomed cylindrical shape whose one end is open. The outer shell 1 has an outer diameter D of the same diameter from the end 1A on the bottom side to the end 1B on the opening side. The outer shell 1 is provided with a first mounting portion 10 and a second mounting portion 20. In addition, the outer shell 1 is provided with a third mounting portion 30. A knuckle bracket 40, a spring seat 50, and a stabilizer bracket 60 are attached to each of the first attachment portion 10, the second attachment portion 20, and the third attachment portion 30, respectively.

The knuckle bracket 40 is connected to the wheel side (knuckle) of the vehicle. The knuckle bracket 40 is rigidly fastened to the knuckle to make the shock absorber function as a structural part of a part of the link in the suspension system. Components such as tires, wheels, and brake units are attached to the knuckles of the vehicle, and the knuckle bracket 40 is used to buffer these vertical movements while the vehicle is traveling. In addition to the force of (1), the shock absorber receives a force or moment when it functions as a structural component of the link.

The spring seat 50 is a spring seat that supports one end of a coil spring disposed between the outer shell 1 and the upper mount on the vehicle body side in the suspension system. The spring seat 50 receives the elastic force of the coil spring in the expansion and contraction direction of the shock absorber. For this reason, a small load acts on the spring seat 50 in comparison with the load acting on the knuckle bracket 40.

The stabilizer bracket 60 is a bracket to which one end of a stabilizer disposed between the left and right wheels of the vehicle is attached. The stabilizer is a torsion bar attached to the suspension device for the purpose of suppressing the horizontal tilt of the vehicle body and stabilizing the posture. The stabilizer bracket 60 receives a force when this stabilizer is twisted.

The force received by the knuckle bracket 40, the spring seat 50 and the stabilizer bracket 60 is the largest for the knuckle bracket 40 directly receiving an impact force or the like from the road surface when the vehicle is traveling, and the spring seat 50 only receives the elastic force of the coil spring. Is the smallest.

As shown in FIG. 1, the first attachment portion 10 is provided at an end portion 1 </ b> A which is a bottom side of the bottomed cylindrical outer shell 1. A knuckle bracket 40 is attached to the outer peripheral surface of the first attachment portion 10. The knuckle bracket 40 is fixed to the first mounting portion 10 by a welding portion 41 formed between the knuckle bracket 40 and the outer peripheral surface of the first mounting portion 10. The knuckle bracket 40 is formed by press-forming a plate material, and has a substantially U-shaped cross section curved along the outer peripheral surface of the outer shell 1. The knuckle bracket 40 is attached to the outer peripheral surface of the first attachment portion 10 in such a manner as to sandwich the first attachment portion 10. The knuckle bracket 40 has welding portions 41 formed at both ends, and is fixed to the outer peripheral surface of the first mounting portion 10. Further, the thickness t10 of the first mounting portion 10 is set such that the thickness ratio t40 / t10 to the thickness t40 of the plate material forming the knuckle bracket 40 is less than two. That is, the plate thickness t10 of the first mounting portion 10 secures at least 0.5 times the plate thickness t40 of the plate forming the knuckle bracket 40.

As shown in FIG. 1, the second attachment portion 20 is provided on the side of the end portion 1 </ b> B that is closer to the opening than the first attachment portion 10. A spring seat 50 is attached to the outer peripheral surface of the second attachment portion 20. The spring sheet 50 is formed in a plate shape which is expanded to one side by press-forming a plate material. The spring seat 50 is fixed to the second mounting portion 20 by a welding portion 51 formed between the spring seat 50 and the outer peripheral surface of the second mounting portion 20. Specifically, the spring seat 50 is formed with a through hole 50A. The spring seat 50 is attached to the outer peripheral surface of the outer shell 1 in such a manner as to penetrate the outer shell 1 through the through holes 50A and expand toward the end 1B side. A welded portion 51 is formed between the peripheral edge of the through hole 50A and the outer peripheral surface of the outer shell 1. The spring seat 50 is fixed to the second mounting portion 20 by the welded portion 51. The thickness t20 of the second mounting portion 20 is set in such a manner that the thickness ratio t50 / t20 of the plate material forming the spring sheet 50 to the thickness t50 is less than 2. That is, the thickness t20 of the second mounting portion 20 secures 0.5 or more times the thickness t50 of the plate material forming the spring sheet 50.

The third attachment portion 30 is provided between the first attachment portion 10 and the second attachment portion 20, as shown in FIG. A stabilizer bracket 60 is attached to the outer peripheral surface of the third attachment portion 30. The stabilizer bracket 60 is fixed to the third mounting portion 30 by a welding portion 61 formed between the third mounting portion 30 and the outer peripheral surface of the third mounting portion 30. The stabilizer bracket 60 is formed by press-forming a plate material, and is formed curved along the outer peripheral surface of the outer shell 1 (not shown). A welded portion 61 is formed at the periphery of the contact surface of the stabilizer bracket 60 with the outer peripheral surface of the outer shell 1. The stabilizer bracket 60 is fixed to the third mounting portion 30 by the welded portion 61.

The thickness t30 of the third mounting portion 30 is thinner than the thickness t10 of the first mounting portion 10 and thicker than the thickness t20 of the second mounting portion 20. The plate thickness t30 of the third mounting portion 30 is set in such a manner that the plate thickness ratio t60 / t30 to the plate thickness t60 of the plate material forming the stabilizer bracket 60 is less than two. That is, the plate thickness t30 of the third mounting portion 30 secures at least 0.5 times the plate thickness t60 of the plate forming the stabilizer bracket 60.

Further, in the outer shell 1 according to the present embodiment, the opening-side end portion 70 which is a portion closer to the opening than the second attachment portion 20 is formed thinner than the second attachment portion 20. That is, as shown in FIG. 1, the plate thickness t 70 of the opening side end 70 is thinner than the plate thickness t 20 of the second mounting portion 20. One end of a dust boot is attached to the outer peripheral surface of the opening end 70 in a product shock absorber. The dust boot is a member that extends along with the extension of the shock absorber to protect the piston rod. The dust boot is usually formed of a tubular and bellows-like elastic body. For this reason, no mechanical strength is required at the open end 70 like at other parts. Therefore, although the plate thickness t70 of the opening side end 70 is the thinnest in the outer shell 1, sufficient mechanical strength is secured.

That is, the outer shell 1 according to the present embodiment has a plate thickness t30 of each of the third attachment portion 30, the second attachment portion 20, and the opening side end portion 70 which is a portion closer to the opening than the first attachment portion 10. , T20 and t70 have a relationship of t10> t30> t20> t70 with respect to the plate thickness t10 of the first mounting portion 10. These portions are provided in order from the end 1A on the bottom side of the outer shell 1 to the end 1B on the opening side. Therefore, the outer shell 1 is formed to be thinner in a stepwise manner from the end 1A on the opening side to the end 1B on the bottom side. In addition, the inner peripheral surface between each part from which an internal diameter differs is loosely connected in the shape of a taper (taper).

Next, the manufacturing method of the outer shell 1 of the said structure is demonstrated. The outer shell 1 is formed by processing a cylindrical work W having an outer diameter D0 and a plate thickness t0 shown in FIG. In the present embodiment, the outer diameter D0 of the work W is larger than the outer diameter D of the outer shell 1. On the other hand, the thickness t0 of the work W and the thickness (t10) of the thickest portion of the outer shell 1 are substantially equal.
In the present embodiment, the method of manufacturing the outer shell 1 includes a first step and a second step.

Specifically, first, the apertured portion w1 is formed at one end WA of the work W (first step). The apertured portion w1 is formed by pressing the end portion WA against an apertured die T1 as shown in FIG. The aperture drawing die T1 is formed in a tapered shape whose inner peripheral surface is reduced in diameter in a mortar shape, and the end portion WA of the work W is formed in a tapered shape following this.

Next, as shown in FIG. 4, a mandrel C is inserted from the end WB of the workpiece W. Then, in this state, as shown in FIG. 5, the drawing die T2 is relatively moved from the end WA to the end WB of the work W to apply at least one of drawing and drawing to the work W 2 steps). Specifically, the mandrel C is inserted from the other end WB of the work W and abuts against the mouth constriction part w1. In this state, the mandrel C is moved in the axial direction, and the work W is passed through the drawing die D2.

As shown in FIG. 4, the through-hole having an inner diameter at the reduced diameter portion T2A equal to the outer diameter D of the outer shell 1 is formed in the draw-down die T2. Therefore, the outer diameter D0 of the work W is reduced by passing the work W into which the mandrel C is inserted through a drawing die T2, and the outer diameter D is formed.

As shown in FIG. 4, the mandrel C is formed in a cylindrical shape in which each of the portions c10, c30, c20, and c70 is gradually expanded in diameter from the distal end to the proximal end. The portions c10, c30, c20, and c70 of the mandrel C correspond to the first attachment portion 10, the third attachment portion 30, the second attachment portion 20, and the opening end 70 of the outer shell 1, respectively. . The outer diameters of the portions c10, c30, c20, and c70 are the inner diameters d10, d30, d20, and d70 of the first attachment portion 10, the third attachment portion 30, the second attachment portion 20, and the opening side end 70, respectively. (See Fig. 1). Further, the respective portions c10, c30, c20 and c70 of the mandrel C are loosely connected in a tapered manner.

The ironing process is performed by these drawing dies D2 and the mandrel C, and the work W is, as shown in FIG. 6, the first attachment portion 10 of the outer diameter D, the inner diameter d10, d30, d20 and d70, and the third attachment portion Respective portions w10, w30, w20 and w70 corresponding to the second attachment portion 20 and the opening side end 70 are formed.

In the drawing process according to the present embodiment, the outer diameter is reduced through the ironing drawing die T2 in a state in which the inner diameter is defined by the mandrel C, but the plate thickness before and after the processing of the work W does not change. There is. The drawing process may be a process of reducing the outer diameter without specifying the inner diameter of the workpiece W. In this case, the thickness of the workpiece W after processing is larger than the original thickness according to the diameter reduction ratio of the outer diameter. The term "ironing" refers to a process in which the outer diameter is reduced through an ironing die in a state in which the inner diameter of the workpiece W is defined, and in this case, the thickness of the workpiece W after processing is a tool for defining the inner diameter. It is determined by the outer diameter of the mandrel and the inner diameter of a die which is a tool for reducing the outer diameter. Therefore, in the case of the present embodiment, in the second step, the portion w10 corresponding to the first attachment portion 10 is drawn to the work W, and the third attachment portion 30, the second attachment portion 20, and the opening The portions w30, w20, and w70 corresponding to the side end portions 70 are subjected to ironing.

Thereafter, as shown in FIG. 7, both ends of the work W are cut to process the end face. Then, as shown in FIG. 8, by performing closing processing or cap welding on the end WA side, a portion to be the end 1A on the bottom side is formed. Finally, the knuckle bracket 40, the spring seat 50, and the stabilizer bracket 60 are welded and fixed to form the outer shell 1 shown in FIG.

Next, the operation and effect of the outer shell 1 configured as described above will be described.
The outer shell 1 which concerns on Embodiment 1 is formed in the bottomed cylindrical shape which one end opened. The outer shell 1 is provided with a first mounting portion 10 and a second mounting portion 20. The first attachment portion 10 is provided at the end portion 1A on the bottom side, and the knuckle bracket 40 is attached to the outer peripheral surface. The second attachment portion 20 is provided closer to the opening than the first attachment portion 10, and a spring seat 50 is attached to the outer peripheral surface. The second attachment portion 20 is thinner than the first attachment portion 10.

The outer shell 1 has a second attachment portion 20 to which the spring seat 50 is attached, which is thinner than the first attachment portion 10 to which the knuckle bracket 40 is attached. That is, the part connected with the axle side on which a larger load or impact acts, and the part to which the spring seat 50 with a smaller load or impact is attached as compared with this part are formed with different thicknesses. As described above, since the plate thicknesses of the first attachment portion 10 and the second attachment portion 20 can be set respectively, an appropriate plate thickness can be set according to the force acting on each portion. In addition, unlike in the case where the plate thickness is uniform, it is not necessary to set the portion where the acting force is relatively small to an excessive thickness in accordance with the portion requiring the most mechanical strength. Therefore, thinning can be achieved.

Therefore, the outer shell 1 of Embodiment 1 can achieve weight reduction while securing mechanical strength.

Moreover, the outer shell 1 of Embodiment 1 is provided with the 3rd attaching part 30. As shown in FIG. The third attachment portion 30 is provided between the first attachment portion 10 and the second attachment portion 20, and the stabilizer bracket 60 is attached to the outer peripheral surface. The third mounting portion 30 is thinner than the first mounting portion 10 and thicker than the second mounting portion 20. Therefore, by sequentially forming the first attachment portion 10, the third attachment portion 30, and the second attachment portion 20, the attachment portions are formed in a stepwise manner from the bottom portion side of the outer shell 1 toward the opening portion side. It is possible to realize a lightweight outer shell while obtaining sufficient strength at 10, 30, and 20.

Further, in the outer shell 1 of the first embodiment, the opening side end portion 70 which is a portion closer to the opening portion than the second attachment portion 20 is thinner than the second attachment portion 20. As described above, by forming the opening side thinner than the second attachment portion 20, which is an attachment portion of the spring seat 50 which does not require relatively high strength, it is possible to further reduce the weight while securing sufficient strength. Can be

In the outer shell 1 of the first embodiment, welds 41 are respectively formed between both ends of the knuckle bracket 40 and the outer peripheral surface of the outer shell 1, and the knuckle bracket 40 is attached to the first attachment 10 by the welds 41. While being fixed, the plate thickness t10 of the first mounting portion 10 is formed to be 0.5 or more times the plate thickness t40 of the plate material forming the knuckle bracket 40. For this reason, the weight reduction of the outer shell 1 can be achieved, and the occurrence of welding defects such as insufficient penetration and burnout due to a difference in plate thickness can be suppressed in fixing by the welding portion 41.

Further, in the outer shell 1 of the first embodiment, a welded portion 51 is formed between the spring seat 50 and the outer peripheral surface of the outer shell 1, and the spring seat 50 is fixed to the second mounting portion 20 by the welded portion 51. The thickness t20 of the second mounting portion 20 is 0.5 or more times the thickness t50 of the plate material forming the spring sheet 50. For this reason, the weight reduction of the outer shell 1 can be achieved, and the occurrence of welding defects such as insufficient penetration and burnout due to the thickness difference can be suppressed in fixing by the welding portion 51.

Further, in the outer shell 1 of the first embodiment, a welded portion 61 is formed between the stabilizer bracket 60 and the outer peripheral surface of the outer shell 1, and the stabilizer bracket 60 is fixed to the third mounting portion 30 by the welded portion 61. The thickness t30 of the third mounting portion 30 is 0.5 or more times the thickness t60 of the plate forming the stabilizer bracket 60. For this reason, while securing the weight reduction of the outer shell 1, it is possible to suppress the occurrence of welding defects such as insufficient penetration and burnout due to the thickness difference in fixing by the welding portion 61.

In the outer shell 1 of the first embodiment, the outer diameter D is made constant, and the inner diameter d10, d30, d20, in order to form the outer shell 1 thinner from the end 1A on the bottom side to the end 1B on the opening side. The sheet thicknesses t10, t30, t20 and t70 are changed by changing the d70 and d70, so that it is possible to realize a simple and beautiful outer shell having no step on the outer peripheral surface.

The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention.
(1) In the first embodiment, a mode in which the drawing process and the ironing process are performed as at least one of the drawing process and the ironing process in the second step is exemplified, but this is not essential. For example, the configuration may be such that only the ironing process is performed.
(2) In the first embodiment, the third attachment portion is provided, and the stabilizer bracket is attached to the third attachment portion. However, this is not essential. The outer shell according to the present invention may be an outer shell which does not have the third attachment portion and to which the stabilizer bracket is not attached.
(3) In the first embodiment, the third mounting portion is illustrated as being thinner than the first mounting portion and thicker than the second mounting portion, but this is not essential. When the third attachment portion is provided, the thickness of the third attachment portion may be equal to that of the first attachment portion or the second attachment portion.
(4) In the first embodiment, the configuration in which the portion closer to the opening than the second mounting portion is formed to be thinner than the second mounting portion is illustrated, but this is not essential. The portion closer to the opening than the second mounting portion may have the same thickness as that of the second mounting portion.
(5) In the first embodiment, the outer shell is formed so as to be gradually thinner from the bottom side to the opening side, but in this “stepwise”, the inner peripheral surface is formed in a tapered shape. By including, the form formed gradually thinly toward the opening side from the bottom side is also included.
(6) In the first embodiment, the knuckle bracket is fixed to the first mounting portion by the welding portion formed between the knuckle bracket and the outer peripheral surface of the first mounting portion. It may be in the form of being attached by a method.
(7) In the first embodiment, the spring seat is fixed to the second mounting portion by the welded portion formed between the second mounting portion and the outer peripheral surface of the second mounting portion. It may be in the form of being attached by a method. Alternatively, for example, a method may be employed in which a plurality of processing (bulge processing) is performed in which the outer peripheral surface is expanded radially outward from the inside (bulge processing), and then a spring seat is pressed in and fixed.
(8) In the first embodiment, the stabilizer bracket is fixed to the third mounting portion by the welded portion formed between the third mounting portion and the outer peripheral surface of the third mounting portion. It may be in the form of being attached by a method.

DESCRIPTION OF SYMBOLS 1 ... Outer shell, 1A ... End part by the side of the bottom of an outer shell, 1B ... End part by the side of an opening of an outer shell, 10 ... 1st attachment part, 20 ... 2nd attachment part, 30 ... 3rd attachment part, 40 ... knuckle bracket, 41 ... welded portion, 50 ... spring seat, 50A ... through hole, 51 ... welded portion, 60 ... stubby bracket, 61 ... welded portion, 70 ... opening side end, C ... mandrel, T1 ... aperture drawing die , T2 ... squeezing die, W ... work, WA, WB ... end of work

Claims

A first attachment portion which is formed in a bottomed cylindrical shape with one end opened, is provided at an end portion on the bottom side, and a knuckle bracket is attached to an outer peripheral surface, and closer to the opening than the first attachment portion It has a second mounting part that is provided and has a spring seat attached to the outer peripheral surface,
An outer shell of a shock absorber for a vehicle, wherein the second attachment portion is formed to be thinner than the first attachment portion.
And a third attachment portion provided between the first attachment portion and the second attachment portion and having a stabilizer bracket attached to the outer peripheral surface,
The outer shell of a shock absorber for a vehicle according to claim 1, wherein the third attachment portion is thinner than the first attachment portion and thicker than the second attachment portion.
The outer shell of a shock absorber for a vehicle according to claim 1, wherein a portion closer to the opening than the second attachment portion is formed thinner than the second attachment portion.
The outer shell of a shock absorber for a vehicle according to claim 2, wherein a portion closer to the opening than the second attachment portion is formed thinner than the second attachment portion.
Between the first mounting portion and the knuckle bracket, a welding portion for fixing the knuckle bracket to the first mounting portion is formed,
The outer shell of a shock absorber for a vehicle according to claim 1, wherein a plate thickness of the first attachment portion is 0.5 times or more of a plate thickness of a plate forming the knuckle bracket.
Between the second mounting portion and the spring seat, a welding portion for fixing the spring seat to the second mounting portion is formed,
The outer shell of a shock absorber for a vehicle according to claim 1, wherein a plate thickness of the second attachment portion is 0.5 times or more of a plate thickness of a plate forming the spring seat.
Between the third mounting portion and the stabilizer bracket, a welding portion for fixing the stabilizer bracket to the third mounting portion is formed,
The outer shell of a shock absorber for a vehicle according to claim 2, wherein a plate thickness of the third attachment portion is 0.5 times or more of a plate thickness of a plate forming the stabilizer bracket.
The vehicle shock absorber according to claim 1, wherein the outer diameter is constant and the inner diameter is increased stepwise in a direction from the bottom end to the opening end. Outer shell.