CN217530623U

CN217530623U - Auxiliary assembling tool and vibration damper assembly

Info

Publication number: CN217530623U
Application number: CN202220315624.2U
Authority: CN
Inventors: 李玉魁
Original assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Current assignee: Evergrande Hengchi New Energy Automobile Research Institute Shanghai Co Ltd
Priority date: 2022-02-16
Filing date: 2022-02-16
Publication date: 2022-10-04
Anticipated expiration: 2032-02-16

Abstract

The application discloses supplementary assembly tool and shock absorber subassembly, this supplementary assembly tool are used for assembling shock absorber urceolus and festival fork, relate to product manufacturing technical field. The shock absorber outer cylinder is provided with a positioning pin, the positioning pin protrudes out of the surface of the shock absorber outer cylinder, the positioning pin comprises a first part, the yoke is provided with a first side surface and a second side surface which are oppositely arranged, and the first side surface and the second side surface form an opening of the yoke; the auxiliary assembling tool comprises a positioning piece, the positioning piece is provided with a positioning part, the positioning part is provided with a holding tank, the holding tank is used for holding the first part, the positioning piece is magnetically connected with the positioning pin under the condition that the outer cylinder of the shock absorber is connected with the joint fork along the insertion direction, the positioning piece and the positioning pin are in positioning fit along the insertion direction, and the positioning part is located between the first side face and the second side face. The scheme can solve the problem of poor positioning accuracy in the assembly of the outer cylinder and the yoke of the existing shock absorber.

Description

Auxiliary assembling tool and vibration damper assembly

Technical Field

The application belongs to the technical field of product manufacturing, concretely relates to supplementary erecting tool and shock absorber subassembly.

Background

A shock absorber, which is one of constituent members of a suspension system of a vehicle, is mainly used to suppress vibration when a spring absorbs vibration and then rebounds and impact from a road surface, thereby making the vehicle travel more stable. When the lower end of the shock absorber body of the shock absorber assembly adopts the joint fork, the assembly size precision of the shock absorber assembly needs to be strictly controlled, so that the failure of the shock absorber assembly is avoided, namely, the vehicle chassis and the vehicle body cannot be assembled on a vehicle assembly line.

In practical application, the shock absorber assembly is usually assembled by using a positioning pin to assemble the outer cylinder of the shock absorber and the yoke, so that the shock absorber is circumferentially positioned. However, the assembly method has the problems that the position of the positioning pin is not easy to control, so that the positioning precision between the positioning pin and the yoke opening is reduced, and even the positioning pin and the yoke opening interfere with each other after the bolt is locked, so that the false torque or the part is damaged.

SUMMERY OF THE UTILITY MODEL

The purpose of the embodiment of the application is to provide an auxiliary assembling tool and a damper assembly, wherein the auxiliary assembling tool is used for assembling an outer cylinder of a damper and a yoke, and the problem that the positioning accuracy is poor in the existing assembly of the outer cylinder of the damper and the yoke can be solved.

In order to solve the technical problem, the present application is implemented as follows:

in a first aspect, the embodiment of the present application provides an auxiliary assembling tool for assembling an outer tube of a shock absorber and a yoke, wherein the outer tube of the shock absorber is provided with a positioning pin protruding out of a surface of the outer tube of the shock absorber, the positioning pin comprises a first portion, the yoke has a first side surface and a second side surface which are arranged oppositely, and the first side surface and the second side surface form an opening of the yoke;

the auxiliary assembling tool comprises a positioning piece, the positioning piece is provided with a positioning portion, the positioning portion is provided with a holding tank, the holding tank is used for holding the first portion, the positioning piece is magnetically connected with the positioning pin under the condition that the outer cylinder of the shock absorber is connected with the joint fork along the insertion direction, the positioning piece is in positioning fit with the positioning pin along the insertion direction, and the positioning portion is located between the first side face and the second side face.

In a second aspect, the embodiment of the present application further provides a damper assembly, which includes a damper and an auxiliary assembling tool, where the damper includes a damper outer cylinder and a yoke, and the auxiliary assembling tool is the above-mentioned auxiliary assembling tool.

In the embodiment of the application, under the condition that the outer cylinder of the shock absorber is connected with the yoke along the inserting direction, the first part of the positioning pin is located in the accommodating groove of the positioning piece, the positioning piece is magnetically connected with the positioning pin, the positioning piece is in positioning fit with the positioning pin along the inserting direction, the positioning part of the positioning piece is located between the first side face and the second side face of the yoke, and correspondingly, the first part of the positioning pin is located between the first side face and the second side face of the yoke, so that the first part of the positioning pin is prevented from interfering with the first side face and the second side face of the yoke, and the positioning accuracy between the positioning pin and the opening of the yoke is ensured; after the outer cylinder of the shock absorber and the joint fork are inserted, the auxiliary assembling tool is disassembled, the bolt penetrates through the mounting threaded hole formed in the joint fork, then the bolt is screwed, and the bolt is fastened by the nut, so that the assembling process of the outer cylinder of the shock absorber and the joint fork is completed. Therefore, the auxiliary assembling tool is used for assembling the outer cylinder of the shock absorber and the yoke, the position of the positioning pin is convenient to control, and the mounting accuracy of the outer cylinder of the shock absorber and the yoke can be improved.

Drawings

FIG. 1 is an assembly schematic view of an outer cylinder of a shock absorber disclosed in an embodiment of the present application and connected with a yoke along an insertion direction;

FIG. 2 is an assembly view of the outer cylinder of the shock absorber disclosed in the embodiment of the present application from another view point of connecting with a yoke in the insertion direction;

FIG. 3 is a schematic structural diagram of an auxiliary assembly tool disclosed in an embodiment of the present application;

fig. 4 is a sectional view of an auxiliary fitting tool disclosed in an embodiment of the present application.

Description of the reference numerals:

100-a shock absorber outer cylinder;

200-section fork;

300-locating pins, 310-first portion, 320-second portion;

400-positioning piece, 410-positioning part, 411-accommodating groove, 412-first side wall, 412 a-first inclined surface, 412 b-third surface, 413-second side wall, 413 a-second inclined surface, 413 b-fourth surface, 414-base, 420-connecting part, 421-first surface, 422-second surface, 423-groove and 430-guiding part;

500-magnetic element.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application may be practiced in sequences other than those illustrated or described herein, and that the terms "first," "second," and the like are generally used herein in a generic sense and do not limit the number of terms, e.g., the first term can be one or more than one. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The auxiliary assembly tool provided in the embodiments of the present application is described in detail through specific embodiments and application scenarios thereof with reference to the accompanying drawings.

As shown in fig. 1 to 4, the embodiment of the present application discloses an auxiliary assembling tool for assembling a damper outer cylinder 100 and a yoke 200, the damper outer cylinder 100 is provided with a positioning pin 300, and optionally, the positioning pin 300 and the damper outer cylinder 100 may be fixedly connected by welding, bonding, and the like, which is not limited in the embodiment of the present application. The positioning pin 300 protrudes from the surface of the outer damper cylinder 100, the positioning pin 300 includes a first portion 310, the yoke 200 has a first side surface and a second side surface which are oppositely arranged, the first side surface and the second side surface form an opening of the yoke, and optionally, the distance between the first side surface and the second side surface may be 2mm, which is not particularly limited in the embodiment of the present application. The auxiliary assembling tool comprises a positioning piece 400, the positioning piece 400 is provided with a positioning part 410, the positioning part 410 is provided with a containing groove 411, the containing groove 411 is used for containing the first part 310, under the condition that the outer damper cylinder 100 is connected with the yoke 200 along the insertion direction, the positioning piece 400 is magnetically connected with the positioning pin 300, optionally, at least one of the positioning piece 400 and the positioning pin 300 can be of a magnetic structure, the positioning piece 400 is in positioning fit with the positioning pin 300 along the insertion direction, and the positioning part 410 is located between the first side face and the second side face, namely, in the process that the outer damper cylinder 100 is inserted into the yoke 200, the positioning piece 400 is mainly used for positioning the positioning pin 300, so that the positioning accuracy of the positioning pin 300 is improved. When the damper outer cylinder 100 is connected to the yoke 200, the damper outer cylinder 100 is positioned in the circumferential direction by the positioning pin 300, and the damper outer cylinder 100 is positioned in the axial direction by the end of the damper outer cylinder 100 and the bottom of the yoke 200 inside the opening.

Under the condition that the outer damper cylinder 100 is connected with the yoke 200 along the inserting direction, the first part 310 of the positioning pin 300 is located in the accommodating groove 411 of the positioning piece 400, the positioning piece 400 is magnetically connected with the positioning pin 300, the positioning piece 400 is in positioning fit with the positioning pin 300 along the inserting direction, the positioning part 410 of the positioning piece 400 is located between the first side surface and the second side surface of the yoke 200, and correspondingly, the first part 310 of the positioning pin 300 is located between the first side surface and the second side surface of the yoke 200, so that the first part 310 of the positioning pin 300 is prevented from interfering with the first side surface and the second side surface of the yoke 200, and the positioning accuracy between the positioning pin 300 and the opening of the yoke 200 is ensured; after the outer cylinder 100 of the shock absorber is inserted into the yoke 200, the auxiliary assembling tool is removed, bolts are inserted through the mounting threaded holes formed in the yoke 200, then the bolts are tightened, and are fastened by nuts, thereby completing the assembling process of the outer cylinder 100 of the shock absorber and the yoke 200. Therefore, in the embodiment of the present invention, the auxiliary assembly tool is used to assemble the damper outer cylinder 100 and the yoke 200, so that the position of the positioning pin 300 can be easily controlled, and the mounting accuracy of the damper outer cylinder 100 and the yoke 200 can be improved.

The positioning part 410 of the positioning member 400 can be magnetically coupled with the first part 310 of the positioning pin 300, and in the case where the damper outer cylinder 100 is coupled with the yoke 200, the positioning part 410 is located in the opening of the yoke 200, which makes it inconvenient to detach the auxiliary assembling tool. Therefore, in an alternative embodiment, the positioning element 400 includes a connecting portion 420 and a positioning portion 410 sequentially arranged along the insertion direction, the connecting portion 420 is connected to the positioning portion 410, and optionally, the connecting portion 420 and the positioning portion 410 may adopt a fixed connection manner such as welding, bonding, and the like, which is not limited in this application. The positioning pin 300 further includes a second portion 320 connected to the first portion 310, a connecting portion 420 magnetically connected to the second portion 320, and a receiving groove 411 opened in the positioning portion 410, wherein in a state where the damper outer cylinder 100 is connected to the yoke 200, the connecting portion 420 is located outside the opening of the yoke 200, which facilitates removal of the auxiliary assembly tool, thereby improving assembly efficiency.

In a further alternative embodiment, the connecting portion 420 has a first surface 421 and a second surface 422 connected to each other, and the positioning portion 410 is disposed on the second surface 422, because the surface of the damper outer cylinder 100 is a curved surface, and accordingly, the shape of the positioning pin 300 is adapted to the surface of the damper outer cylinder 100, if the first surface of the connecting portion 420 is a flat surface, the contact area between the positioning member 400 and the positioning pin 300 is small, the connection between the two is not firm, and the auxiliary assembly tool is easy to drop. Therefore, optionally, the first surface 421 is a curved surface, the positioning portion 410 protrudes out of the first surface 421, the bottom of the accommodating groove 411 is connected to and flush with the first surface 421, the first surface 421 is used for being attached to the second portion 320, and the contact area between the connecting portion 420 and the second portion 320 of the positioning pin 300 is large, so that the positioning member 400 and the positioning pin 300 are connected more firmly, and the auxiliary assembly tool is prevented from falling off. Further alternatively, the first surface 421 may be an arc surface, and the arc surface is located on a circumference concentrically arranged with the outer circumferential surface of the outer damper cylinder 100, that is, the arc surface is arranged coaxially with the outer damper cylinder 100, so that the fitting degree of the first surface 421 and the second portion 320 is further improved, and the stability of the connection between the positioning member 400 and the positioning pin 300 is enhanced.

In a further alternative embodiment, the positioning portion 410 has a first side wall 412 and a second side wall 413 which are oppositely arranged, and a base 414 which connects the first side wall 412 and the second side wall 413, the base 414 is arranged on the second surface 422, the first side wall 412 has a third surface 412b, the second side wall 413 has a fourth surface 413b, the third surface 412b is flush with the fourth surface 413b, optionally, the third surface 412b and the fourth surface 413b can be connected or arranged at intervals, when the third surface 412b and the fourth surface 413b are arranged at intervals, in the case that the auxiliary assembly tool is connected with the damper outer cylinder 100, the accommodating groove 411 of the positioning portion 410 is communicated with the opening of the yoke 200, and the contact area of the first portion 310 of the positioning pin 300 and the inner wall of the accommodating groove 411 is small, so as to facilitate the auxiliary assembly tool to be detached; when the third surface 412b is connected to the fourth surface 413b, the positioning portion 410 can protect the end of the first portion 310 from colliding with the yoke 200 in the case where the damper outer cylinder 100 is connected to the yoke 200 in the insertion direction. In the case where the third surface 412b and the fourth surface 413b may extend to the end surface where the positioning part 410 is connected to the connecting part 420, when the auxiliary assembling tool is mounted to the positioning pin 300, it is inconvenient for an installer to see the positioning pin 300, and thus the first portion 310 of the positioning pin 300 cannot be accurately aligned with the receiving groove 411 of the positioning part 410, which may reduce the assembling efficiency; the positioning portion 410 of this structure is easily in contact with the second portion 320 of the positioning pin 300, and the positioning pin 300 is easily worn during the insertion process. Based on this, optionally, the first side wall 412 further has a first inclined surface 412a, the first surface 421, the first inclined surface 412a and the third surface 412b are sequentially connected, the second side wall 413 further has a second inclined surface 413a, and the first surface 421, the second inclined surface 413a and the fourth surface 413b are sequentially connected, so that the positioning portion 410 adopting such a structure can not only improve the assembly efficiency of the damper outer cylinder 100 and the yoke 200, but also avoid the abrasion of the positioning pin 300 by the positioning portion 410, and at the same time, can save the manufacturing material of the positioning member 400, and reduce the cost.

Optionally, the auxiliary assembling tool further includes a magnetic member 500, the magnetic member 500 is disposed on the connecting portion 420, in an optional embodiment, the magnetic member 500 and the connecting portion 420 are of an integrated structure, that is, the connecting portion 420 and the magnetic member 500 can be integrally formed, and there is no need to additionally mount the magnetic member 500, so that the process is saved, the mounting of the auxiliary assembling tool is facilitated, and the surface of the integrated structure facing the second portion 320 of the positioning pin 300 can be integrally attached to the second portion 320, so that the connection area is large, and the connection between the two is firmer. In another optional embodiment, the magnetic member 500 and the connecting portion 420 are in a split structure, the first surface 421 is provided with a groove 423, the magnetic member 500 is disposed in the groove 423, optionally, the magnetic member 500 and the connecting portion 420 may be fixedly connected in an adhesion manner, and the embodiment of the present application does not specifically limit this. The magnetic member 500 and the connecting portion 420 are of a split structure, so that maintenance is facilitated, manufacturing materials of the positioning member 400 and the magnetic member 500 can be saved, and cost is saved.

In an alternative embodiment, the positioning member 400 includes a positioning portion 410 and a guiding portion 430 arranged in sequence along the insertion direction, the guiding portion 430 is connected to the positioning portion 410, the receiving slot 411 is opened in the positioning portion 410, and the guiding portion 430 has a tapered structure in the insertion direction, that is, the cross-sectional area of the guiding portion 430 is gradually smaller in the insertion direction, and the cross-sectional area is the area of a cross section perpendicular to the insertion direction. The guide part 430 with such a structure facilitates the insertion of the positioning member 400 into the opening of the yoke 200, and the guide part 430 guides the insertion of the positioning pin 300 during the insertion process, thereby improving the assembly efficiency of the damper outer cylinder 100 and the yoke 200.

In an alternative embodiment, the positioning portion 410 has a first side wall 412 and a second side wall 413 which are oppositely arranged, and a base 414 which connects the first side wall 412 and the second side wall 413, the base 414 is connected to the second surface 422, and in the case that the damper outer cylinder 100 is connected to the yoke 200, a first assembling gap is formed between the first side wall 412 and the first side surface, and a second assembling gap is formed between the second side wall 413 and the second side surface, so that the auxiliary assembling tool can be detached easily, and the assembling efficiency can be improved. When the first fitting clearance is larger or smaller than the second fitting clearance, which means that the first portion 310 of the positioning pin 300 is not centrally disposed in the opening in the case where the auxiliary fitting tool is connected to the damper outer cylinder 100, the positioning pin 300 is likely to touch the first and second side surfaces of the yoke 200 upon the damper outer cylinder 100 being subjected to a large external force during the running of the vehicle. Therefore, optionally, the first assembly gap is equal to the second assembly gap, and the positioning portion 410 is centered in the opening of the yoke 200, so as to further improve the positioning accuracy of the positioning member 400, and the first portion 310 of the positioning pin 300 is not easily touched with the first side surface and the second side surface of the yoke 200 even if the shock absorber outer tube 100 is subjected to a large external force during the running of the vehicle. Further, if the first fitting clearance and the second fitting clearance are small, for example, less than 0.05mm, then during the process of removing the auxiliary fitting tool, if the auxiliary fitting tool is slightly inclined, the auxiliary fitting tool may be stuck in the opening, which increases the difficulty of removing the auxiliary fitting tool; therefore, further optionally, the first assembling gap and the second assembling gap are both larger than or equal to 0.05mm, so that the disassembling difficulty of the auxiliary assembling tool is reduced, and the assembling efficiency is further improved.

In the case where the auxiliary assembling tool is coupled to the damper outer cylinder 100, if the first portion 310 of the positioning pin 300 is in contact with the inner wall of the receiving groove 411, there may be a friction force between the positioning part 410 and the inner wall of the receiving groove 411, it is inconvenient to detach the auxiliary assembling tool, and if the auxiliary assembling tool is slightly inclined during the process of detaching the auxiliary assembling tool, the first portion 310 of the positioning pin 300 may be caught in the receiving groove 411, which increases the difficulty of detaching the auxiliary assembling tool, and may even wear the first portion 310; therefore, optionally, a third assembling gap is formed between the first part 310 and the inner wall of the accommodating groove 411, which not only facilitates the removal of the auxiliary assembling tool and reduces the difficulty of the removal, but also prevents the first part 310 of the positioning pin 300 from being caught. In addition, since the opening size of the yoke 200 is fixed, if the third assembling gap is large, the thickness of the side wall of the accommodating groove 411 needs to be set to be small, which increases the manufacturing difficulty of the auxiliary assembling tool, so further optionally, the third assembling gap is less than or equal to 0.1mm, which reduces the manufacturing difficulty of the auxiliary assembling tool on the basis of facilitating the removal of the auxiliary assembling tool.

The depth of the receiving groove 411 may be greater than the thickness of the positioning portion, at this time, the first portion 310 is separated from the groove bottom of the receiving groove 411, only the sidewall of the first portion 310 contacts the inner sidewall of the receiving groove 411, the contact area between the sidewall of the first portion 310 and the inner sidewall of the receiving groove 411 is small, at this time, the connection between the positioning element 400 and the positioning pin 300 is not firm, and the auxiliary assembly tool is easy to drop. Therefore, in an alternative embodiment, the depth of the receiving groove 411 is less than or equal to the thickness of the first portion 310, and at this time, the first portion 310 contacts with both the groove bottom and the inner sidewall of the receiving groove 411, and the contact area between the first portion 310 and the inner sidewall is relatively large, so that the connection firmness between the positioning member 400 and the positioning pin 300 is enhanced, and the auxiliary assembly tool is prevented from falling off. Further alternatively, the depth of the receiving groove 411 is equal to the thickness of the first portion 310, and the first portion 310 of the positioning pin 300 is completely located in the receiving groove 411, and the positioning portion 410 can protect the first portion 310 of the positioning pin 300 from being damaged by the yoke 200 during the process of inserting the damper outer cylinder 100 into the yoke 200.

Based on the auxiliary assembly tool disclosed in the embodiment of the present application, the embodiment of the present application further discloses a shock absorber assembly, which comprises a shock absorber and an auxiliary assembly tool, wherein the shock absorber comprises a shock absorber outer cylinder 100 and a yoke 200, and the auxiliary assembly tool is the auxiliary assembly tool described in any of the above embodiments.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An auxiliary assembling tool for assembling a damper outer cylinder (100) and a yoke (200), wherein the damper outer cylinder (100) is provided with a positioning pin (300), the positioning pin (300) protrudes out of the surface of the damper outer cylinder (100), the positioning pin (300) comprises a first part (310), the yoke (200) is provided with a first side surface and a second side surface which are oppositely arranged, and the first side surface and the second side surface form an opening of the yoke (200);

the auxiliary assembling tool comprises a positioning piece (400), wherein the positioning piece (400) is provided with a positioning part (410), the positioning part (410) is provided with a positioning groove (411), the positioning groove (411) is used for accommodating the first part (310), the outer cylinder (100) of the shock absorber is connected with the joint fork (200) along the insertion direction, the positioning piece (400) is magnetically connected with the positioning pin (300), the positioning piece (400) is matched with the positioning pin (300) along the insertion direction in a positioning manner, and the positioning part (410) is positioned between the first side face and the second side face.

2. The auxiliary fitting tool according to claim 1, wherein the positioning member (400) includes a connecting portion (420) and the positioning portion (410) which are sequentially arranged in the insertion direction, the connecting portion (420) is connected to the positioning portion (410), the positioning pin (300) further includes a second portion (320) connected to the first portion (310), the connecting portion (420) is magnetically connected to the second portion (320), and the receiving groove (411) is opened in the positioning portion (410).

3. The auxiliary fitting tool according to claim 2, wherein the connecting portion (420) has a first surface (421) and a second surface (422) connected to each other, the positioning portion (410) is disposed on the second surface (422), the first surface (421) is a curved surface, the positioning portion (410) protrudes from the first surface (421), a groove bottom of the accommodating groove (411) is connected to and flush with the first surface (421), and the first surface (421) is used for being attached to the second portion (320).

4. The auxiliary fitting tool according to claim 3, wherein the positioning portion (410) has a first side wall (412) and a second side wall (413) which are arranged opposite to each other, and a base (414) which connects the first side wall (412) and the second side wall (413), the base (414) is provided on the second surface (422), the first side wall (412) has a first inclined surface (412 a) and a third surface (412 b), the first surface (421) and the first inclined surface (412 a) are sequentially connected to the third surface (412 b), the second side wall (413) has a second inclined surface (413 a) and a fourth surface (413 b), the first surface (421) and the second inclined surface (413 a) are sequentially connected to the fourth surface (413 b), and the third surface (412 b) is flush with the fourth surface (413 b).

5. Auxiliary assembling tool according to claim 3, characterized in that it further comprises a magnetic member (500), said magnetic member (500) being provided to said connection portion (420),

the magnetic part (500) and the connecting part (420) are of an integrated structure; alternatively, the first and second electrodes may be,

the magnetic part (500) and the connecting part (420) are of a split structure, a groove (423) is formed in the first surface (421), and the magnetic part (500) is arranged in the groove (423).

6. The auxiliary assembling tool as claimed in claim 1, wherein the positioning member (400) includes a positioning portion (410) and a guide portion (430) which are arranged in the inserting direction in this order, the guide portion (430) is connected to the positioning portion (410), the receiving groove (411) opens to the positioning portion (410), and the guide portion (430) has a tapered structure in the inserting direction.

7. The auxiliary fitting tool according to claim 3, wherein the positioning portion (410) has a first side wall (412) and a second side wall (413) that are arranged opposite to each other, and a base (414) that connects the first side wall (412) and the second side wall (413), the base (414) being connected to the second surface (422), and in a case where the damper outer cylinder (100) is connected to the yoke (200), a first fitting gap is provided between the first side wall (412) and the first side surface, and a second fitting gap is provided between the second side wall (413) and the second side surface, and the first fitting gap is equal to the second fitting gap.

8. The auxiliary fitting tool according to claim 1, wherein a third fitting clearance is provided between the first portion (310) and an inner wall of the receiving groove (411) in a state where the auxiliary fitting tool is coupled to the damper outer cylinder (100).

9. The auxiliary fitting tool according to claim 1, wherein the depth of the receiving groove (411) is less than or equal to the thickness of the first portion (310).

10. A damper assembly characterized by comprising a damper and an auxiliary fitting tool, the damper comprising a damper outer tube (100) and a yoke (200), the auxiliary fitting tool being the auxiliary fitting tool of any one of claims 1 to 9.