JP5800236B2 - Shock absorber assembly jig - Google Patents

Description

  The present invention relates to an assembly jig used when a shock absorber of a suspension in a vehicle is assembled to a vehicle body.

When a shock absorber is interposed between the vehicle body and the suspension member, the assembly posture of the shock absorber is determined in consideration of the structure of the vehicle and the running stability of the vehicle. For example, the shock absorber in the running state In some cases, the vehicle body side assembly portion and the suspension side assembly portion are mounted in an open state as shown in FIG.
This shock absorber has a vehicle body side assembly portion and a suspension side assembly portion, and both assembly portions have assembly pin portions that are assembled to the assembly portions provided on the vehicle body side and the suspension side, respectively. A cylindrical inner sleeve to be fitted, an outer sleeve fixed to the shock absorber main body, and a rubber bush interposed between the inner sleeve and the outer sleeve are configured.

And these inner sleeves and the assembly | attachment pin part are the structures fixed by screwing a nut in the thread part formed in the assembly | attachment pin part.
Therefore, the shock absorber body side is structured to be assembled to the vehicle body via the rubber bush.
This rubber bushing absorbs the relative displacement between the vehicle body side and the suspension side that occurs when the vehicle is running, preventing excessive displacement force from acting on the vehicle body side, suspension side, and shock absorber, and absorbing vibration. ing.

Japanese Patent No. 4474946 (Patent Document 1) is disclosed as a prior art for improving the assemblability of a method of assembling a shock absorber to a vehicle body.
According to Patent Document 1, a method for assembling a shock absorber with a rebound spring that incorporates a rebound spring that presses the piston portion of the shock absorber inward of the cylinder portion is shown. Since it is extended in the direction of pulling out from the cylinder against the force, when connecting the other end of the shock absorber with rebound spring to the suspension member, the compression cost of the spring interposed between the vehicle body and the suspension member Is small, and it is disclosed that means for preventing the vehicle body from rising is unnecessary.

Japanese Patent No. 4474946

However, in order to assemble the shock absorber to the vehicle body, in the production line, the so-called sub-assembly in which the vehicle body side assembly portion at the top of the shock absorber is first assembled on the vehicle body side, and then the suspension member and the axle are integrated together. The assembled assembly is conveyed to the underside of the vehicle body, and the suspension side assembly portion at the bottom of the shock absorber is assembled to the suspension member together with other parts.
In such an assembling sequence, when assembling the vehicle body side assembling part on the upper part of the shock absorber on the vehicle body side, the operator generally assembles the shock absorber with the lower end side hanging down in the direction of gravity.
Therefore, when the lower side of the shock absorber is mounted in a posture inclined outward as shown in FIG. 1 in the ready-to-run state after the vehicle is completed, the lower end side of the shock absorber is suspended from the state where it is suspended in the direction of gravity. At that time, the rubber bushing of the shock absorber body side assembly was deformed between the inner sleeve and the outer sleeve, and the deformation was left as a strain (residual). It will be attached to the car body in the state).

  As described above, in a state where the strain remains in the rubber bush, when the relative displacement between the vehicle body side and the suspension side is applied as the vehicle travels, a larger strain is generated in the rubber bush. There is a problem that heat generation due to strain and cracks are likely to occur and the durability of the rubber bush is lowered.

  Patent Document 1 does not disclose an assembling method in consideration of the assembling posture of the shock absorber when the vehicle can travel.

  Therefore, the present invention has been made in view of such problems, and when the shock absorber is assembled to the vehicle body, the shock absorber is suspended by holding it in the posture of the shock absorber in a vehicle travelable state. It is an object of the present invention to prevent distortion from occurring in the elastic member of the assembling part when assembling to the member side.

  The present invention is directed to achieving such an object, and the invention relating to a shock absorber assembly jig is a shock absorber assembly jig interposed between a vehicle body and a suspension member, the shock absorber A first engagement portion provided on one end side of the absorber and engaged with a vehicle body side assembly portion for assembling the shock absorber to the vehicle body; and provided on the other end side of the shock absorber and disposing the shock absorber on the suspension. A second engagement portion that engages with a suspension-side assembly portion that is assembled to a member, and the first engagement portion and the second engagement portion are connected to each other so as to extend in the axial direction of the shock absorber. And provided in any one of a main body portion that holds the contracted state of the shock absorber, a coupling portion between the first engagement portion and the main body portion, or the first engagement portion and the main body portion. And a guide portion that holds the shock absorber in the posture of the vehicle completed state when the shock absorber is assembled to the vehicle body by being brought into contact with a specific part of the vehicle body, It is characterized by that.

According to the invention of the assembling jig, the shock absorber can be assembled to the vehicle in a vehicle-completed posture by the guide portion coming into contact with a specific part of the vehicle body.
Therefore, by using such an assembly jig, it is interposed between the inner sleeve on the shock absorber side into which the assembly pin disposed on the vehicle body is fitted and the outer sleeve fixed on the shock absorber main body side. The elastic member is prevented from being assembled in a state in which torsional distortion occurs when the vehicle is completed. As a result, it is possible to minimize the amount of distortion of the elastic member caused by relative displacement between the vehicle body side and the suspension side during vehicle travel, and to suppress the generation of heat and high stress due to the strain generated during vehicle travel. The durability of the member is improved.
Further, according to the present invention, the assembling jig can be configured with a simple structure having the first engaging portion, the second engaging portion, the main body portion, and the guide portion, and the shock absorber can be attached to the shock absorber. This can be easily performed by contracting and engaging the first engaging portion and the second engaging portion.
Furthermore, since the expansion of the shock absorber is regulated by the main body portion and held in a contracted state, it is possible to prevent the lower end side of the shock absorber from dragging the floor in a production line or the like.

  Preferably, in the present invention, the first engagement portion has a bifurcated portion formed in a bifurcated shape so as to sandwich a coupling portion between the vehicle body side assembly portion and the shock absorber body, The second engaging portion may have a fitting portion that fits into the assembly hole on the suspension member side.

  With such a configuration, the assembling jig has a bifurcated shape formed so as to sandwich the joint portion between the shock absorber body-side assembly member and the shock absorber body, and the suspension member-side assembly hole. Since the shock absorber is shaped to be held by the fitting portion to be fitted into the mounting jig, the assembling jig can be easily attached from the shock absorber. As a result, the assembly work of the shock absorber to the vehicle body becomes easy.

  In the present invention, preferably, the guide portion is formed in a symmetrical shape with respect to the axis of the main body portion.

  As described above, since the guide portion is symmetrical with respect to the axis of the shock absorber, it can be used in common for the shock absorber mounted on the left and right of the vehicle body, and the jig manufacturing cost can be reduced.

  In the present invention, preferably, a flexible member is assembled to a portion of the first engagement portion that contacts the shock absorber.

  By adopting such a configuration, the outer surface of the shock absorber is not damaged by the first engaging portion, and rust prevention and improvement in the merchantability of the vehicle can be obtained.

As described above, according to the invention relating to the shock absorber assembly jig, when the shock absorber is assembled to the vehicle body, it can be assembled while being held in the posture of the shock absorber in the vehicle completed state. When assembling the shock absorber to the suspension member side, it is possible to prevent distortion from occurring in the elastic member of the assembly part, and the amount of distortion of the elastic member caused by relative displacement between the vehicle body side and the suspension side during vehicle traveling can be reduced. It can be suppressed to a minimum, heat generation due to strain generated during vehicle travel and generation of high stress can be suppressed, and durability of the elastic member can be improved.
Further, such an assembling jig can be provided with a simple structure and can be easily attached to the shock absorber.

The vehicle rear view which shows the state with which the assembly | attachment jig | tool of the shock absorber of this invention was mounted | worn is shown. FIG. (A) is a front view of the assembly tool for the shock absorber of the present invention, (B) is a side view of (A), and (C) is a plan view of (A). The detailed structure figure of the vehicle body side assembly part of a shock absorber is shown. The detailed structure figure of the suspension member side assembly part of a shock absorber is shown. It is a perspective view which shows the usage condition of the assembly tool of the shock absorber of this invention. The work flowchart which shows the assembly procedure of the shock absorber of this invention is shown.

Hereinafter, the present invention will be described in detail based on the embodiments shown in the drawings.
However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to specific examples unless otherwise specifically described. Only.
Moreover, about directionality, front-back, left-right, and up-down are described based on the state seated in the driver's seat.

FIG. 1 is a rear view of a vehicle showing a state in which an assembly jig for a shock absorber according to the present invention is mounted. A suspension device is provided between the vehicle body 1 at the rear of the automobile and the rear shaft 20 provided with the rear wheels 4 to absorb shocks and vibrations from the road surface caused by the running of the automobile.
A shock absorber 3 (hereinafter, the shock absorber 3 is abbreviated as “S / ABS 3”) is mounted as one part of the suspension device.
S / ABS 3 is a device that absorbs the expansion and contraction of a spring, which will be described later, in response to large vibrations from the road surface and absorbs vertical vibrations of the vehicle.
Since the S / ABS 3 is a known device, detailed description thereof is omitted.
In FIG. 1, the rear axle 20 has a dead-on frame 16 that extends in the vehicle width direction, which is the main body of the rear axle 20, and the rear wheels 4 that are respectively attached to both ends of the dead-on frame 16 in the vehicle width direction. 4, LH (left side) spring seats 21a and RH (right side) spring seats 21b, which are suspension members, are arranged in a symmetrical manner in the vicinity of the inside of the rear wheels 4 and 4 respectively.
Hereinafter, it will be complicated to separately explain the LH spring seat 21a and the RH spring seat 21b on the left and right sides.
Further, the S / ABS assembling jig 5 of FIG. 1 shows a usage form when the vehicle body side assembly portion 31 of the S / ABS 3 is assembled to the vehicle body 1, and the suspension side assembly portion 32 of the S / ABS 3 is suspended. When assembling to the S / ABS assembling portion 21d of the member, it is removed from the S / ABS 3.

FIG. 2 shows a Z perspective view of FIG. 1. As shown in FIG. 2, the spring seat 21 has an assembly seat 21c for fixing the coil spring 17 and a suspension side assembly portion 32 of the S / ABS 3 (FIG. 5). Relative positional relationship between the vehicle body 1 and the rear shaft 20 that is pivotally attached to the S / ABS assembly portion 21d to be assembled) and the lower arm bracket 18 disposed on the vehicle body 1 side so as to be pivotable in the vertical direction. An assembly seat 21e at the rear end of the lower arm 19 is provided.
Further, the RH spring seat 21b is provided with a rod bracket 21f (see FIG. 1) to which one end 15a of the lateral rod 15 that maintains the relative displacement relationship between the vehicle body 1 and the rear shaft 20 in the vehicle width direction is assembled. Yes.
The other end 15b of the lateral rod 15 is fixed to the cross member 13 and is axially supported by the distal end portion of the lateral bracket 14 projecting downward on the LH side frame 12 side, and the lateral rod 15 is vertically moved with the other end 15b as a fulcrum. It is mounted so that it can rotate.

Based on FIG.4 and FIG.5, the assembly structure of the vehicle body side assembly part 31 and the suspension side assembly part 32 of S / ABS3 is demonstrated.
The S / ABS 3 has a cylindrical shape and includes a vehicle body side assembly portion 31 and a suspension side assembly portion 32 having a cylinder side structure, and the expansion and contraction of the coil spring 17 is caused by the flow resistance of the fluid stored therein. Damping vibration.
The vehicle body side assembly portion 31 of the S / ABS 3 shown in FIG. 4 has a cylindrical first outer sleeve 31a fixed to an end portion (upper side of the drawing in FIG. 3) of the piston side main body 35, and a base portion of the cross member 13. Between the cylindrical first inner sleeve 31b and the first outer sleeve 31a and the first inner sleeve 31b fitted into the fixed assembly pin 13a, the impact and vibration from the vehicle body 1 side, and the vehicle body 1 and the rear A first rubber bush 31c that absorbs relative displacement with the shaft 20 is vulcanized and bonded to the sleeves 31a and 31b.
The first inner sleeve 31b is fastened by a nut 31d via a washer 31e to a screw portion provided at the tip of the assembly pin 13a.

Based on FIG. 5, the assembly structure of the suspension side assembly part 32 of S / ABS3 is demonstrated.
The suspension side assembly portion 32 of the S / ABS 3 is connected to a cylindrical second outer sleeve 32a fixed to an end portion (lower side in the drawing in FIG. 3) of the cylinder side main body 36 and a spring seat 21 which is a suspension side member. A second rubber bushing 32c is provided between the second inner sleeve 32b and the second outer sleeve 32b between the second outer sleeve 32a and the second inner sleeve 32b. It is vulcanized and bonded between.
The S / ABS assembling portion 21d of the spring seat 21 is formed in a U-shaped cross section, and includes an assembling hole (not shown) formed in an opposing surface of the U-shaped cross section. The suspension side assembly portion 32 of the S / ABS 3 is inserted into the opening having a U-shaped cross section, and the assembly bolt 32d is passed through the assembly hole and the hollow portion of the second inner sleeve 32b. The nut 32e is screwed into the screw portion at the tip of 32d and fastened.

Based on FIG. 3, the structure of the S / ABS assembling jig 5 of the present invention will be described.
The S / ABS assembling jig 5 is a coupling portion (adhering portion) 37 between the upper end portion of the piston-side main body 35 and the first outer sleeve 31a of the vehicle body-side assembling portion 31 fixed to the upper end portion (see FIG. 4). The first engagement portion 52 that sandwiches the outer peripheral surface of the first outer sleeve 31a and the second inner sleeve 32b of the suspension side assembly portion 32 are substantially perpendicular to the expansion / contraction direction axis CL1 of the S / ABS 3 Body portion that bends in a direction and linearly connects the second engagement portion 53 to be inserted, and the first engagement portion 52 and the second engagement portion 53 along the expansion / contraction direction axis CL1 of the S / ABS 3. 51.

Furthermore, the vehicle body 1 is specified in a state where the first engagement portion 52 and the main body portion 51 are disposed at the coupling portion, and the first engagement portion 52 and the second engagement portion 53 are engaged with the S / ABS 3. By bending the LH side frame 12 (or the RH side frame 11), which is a part, into contact with the LH side frame bottom surface 12a (see FIG. 6), the S / ABS 3 is bent so as to be in the mounting posture when the vehicle is completed ( Yamagata).
The guide portion 54 is not limited to the coupling portion between the first engagement portion 52 and the main body portion 51, and may be provided in either the first engagement portion 52 or the main body portion 51.

The chevron of the guide portion 54 is symmetrical with respect to the axis CL2 of the main body 51 (substantially parallel to the expansion / contraction direction axis CL1 of the S / ABS 3), and is mounted on the left or right side of the S / ABS 3. It can be used in common.
In the present embodiment, the guide portion 54 is located between the first engagement portion 52 and the main body portion 51 and is fixed to both members, but is fixed to the first engagement portion 52 or the main body portion 51. You may let them.

  In addition, the first engaging portion 52, the second engaging portion 53, the main body portion 51, and the guide portion 54 of the S / ABS assembling jig 5 are each formed by bending a cylindrical metal member and welding them together. It is assembled.

The first engagement portion 52 is a coupling portion (fixed portion) 37 between the upper end portion of the piston-side main body 35 and the first outer sleeve 31a, and the axis CL2 so as to sandwich the outer peripheral surface of the first outer sleeve 31a. A hook-like member having an engagement piece 52a bent substantially at right angles to the engagement piece 52a and a connecting portion 52b extending along the axis CL2 in parallel with the outer peripheral surface of the piston-side main body 35. Are formed substantially parallel (bifurcated).
And the urethane rubber 52c which is a flexible member for preventing the damage of the coating surface of the piston side main body 35 is stuck to the surface which contacts S / ABS3 of the engagement piece 52a.
The material of the flexible member is not limited to urethane rubber, and a flexible material such as vinyl or polypropylene may be covered over the entire engagement piece 52a.
Further, the distal end portion 52d of the engagement piece 52a is provided with a slight arc R or an inclination toward the second engagement portion 53 side. Thereby, at the time of the assembling work of the S / ABS 3 to the vehicle body 1, the S / ABS mounting jig 5 is hardly detached from the S / ABS 3, and the assembling workability is improved.

Based on FIG. 7, an assembly procedure for assembling the S / ABS 3 to the vehicle body 1 using the S / ABS assembly jig 5 will be described.
In the step S1, the S / ABS 3 is contracted to restrict the elongation, and the S / ABS assembly jig 5 is attached to the S / ABS 3.
The S / ABS assembling jig 5 sandwiches the coupling portion 37 between the first outer sleeve 31a and the piston-side main body 35 with the first engagement portion 52 in a bifurcated shape, and the second engagement portion 53 with the suspension-side assembly. The second inner sleeve 32b of the attachment portion 32 is structured to be fitted into the hollow portion.
Therefore, the S / ABS assembling jig 5 attached to the S / ABS 3 is not easily detached from the S / ABS 3.
In step S <b> 2, the first inner sleeve 31 b of the vehicle body side assembly portion 31 of the S / ABS 3 is attached to the assembly pin 13 a of the cross member 13. In this state, the assembly pin 13a and the first inner sleeve 31b are rotatable with respect to the assembly pin 13a.

In the step S3, as shown in FIG. 6, the operator holds the S / ABS 3 and the S / ABS assembly jig 5 while holding the S / ABS assembly jig 5 on one side (see FIG. 6). 6 is brought into contact with the LH side frame bottom surface 12a of the LH side frame 12.
This state shows a so-called vehicle completed state in which the lower side of the S / ABS 3 shown in FIG. 1 spreads outward from the vehicle body 1 and is inclined, and the inclination angle θ formed between the expansion / contraction direction axis CL1 of the S / ABS 3 and the gravity direction perpendicular line Obtained as an attached posture. (The angle θ in FIG. 1 is the same as the inclination angle θ of the chevron in FIG. 3)
In addition, when assembling the S / ABS 3 on the right side, the S / ABS 3 is inclined with respect to the center line (not shown) of the vehicle in the vehicle width direction so as to be symmetrical with the state shown in FIG. Just hold the posture.
In step S4, the first inner sleeve 31b is fastened to the assembly pin 13a with the nut 31d in a state where the inclination angle θ of the expansion / contraction direction axis CL1 of the S / ABS 3 is maintained. In this state, the assembly pin 13a and the first inner sleeve 31b are fixed to the assembly pin 13a.
In step S5, the tightening torque is adjusted with a torque wrench (not shown) so that the tightening torque of the nut 31d is within a specified value.

Accordingly, when the step S5 is completed, the operator releases the pressing of the S / ABS 3 and the guide portion 54 against the LH side frame bottom surface 12a, so that the S / ABS 3 rotates downward by its own weight, and the first The rubber bush 31c is distorted by the amount that the S / ABS 3 is rotated.
Further, since the S / ABS 3 is restricted from being extended by the S / ABS assembling jig 5, for example, even if it flows to the next process on the line in the state of step S5 on the production line, the suspension side assembly The attachment portion 32 is prevented from dragging the floor of the line.

In step S6, the rear shaft 20 is carried in.
A coil spring 17, one end 15 a of the lateral rod 15, a rear end portion of the lower arm 19, and the like are attached to the rear shaft 20.
On the other hand, a bump stopper 62 is attached to the lower end of the spring receiver 61 on the vehicle body 1 side.
The bump stopper 62 is made of an elastic member (generally rubber), and the bump stopper 62 comes into contact with the spring seat 21 when the vehicle body load increases, and the coil pitch of the coil spring 17 directly comes into contact. It is a member that prevents it.

In step S7, the S / ABS assembling jig 5 is removed from the S / ABS 3. In this state, the expansion / contraction of the S / ABS 3 is free.
The cylinder side main body 36 of the S / ABS 3 is rotated about the axis CL2 of the S / ABS 3 in accordance with the mounting posture of the S / ABS mounting portion 21d, so that the second inner sleeve of the suspension side mounting portion 32 is obtained. Change the direction of 32d.
In step S8, the rear shaft 20 is raised, and the suspension-side assembly portion 32 of the S / ABS 3 is fitted into the U-shaped opening of the S / ABS assembly portion 21d of the spring seat 21, so that the assembly bolt 32d And the nut 32e.
Then, the S / ABS assembly portion 21d and the second inner sleeve 32b are fixed.
In this state, the suspension side assembly portion 32 of the S / ABS 3 is rotated outward from the vehicle body 1 to eliminate the distortion that has occurred in the first rubber bush 31c.

Before and after fastening of the suspension side assembly portion 32 of the S / ABS 3, the coil spring 17 is fixed to the vehicle body 1 side, the other end 15 b of the lateral rod 15 is connected to the lower end portion of the lateral bracket 14, and the front end portion of the lower arm 19. The connection to the lower end of the lower arm bracket 18 of 19a is performed.
In the step S9, the assembly bolt 32d and the nut 32e are set within a specified tightening torque range.

As described above, since the S / ABS assembly jig 5 is used to assemble the vehicle body side assembly portion 31 of the S / ABS 3 on the vehicle body side in advance in the posture when the vehicle is completed, When the S / ABS assembly jig 5 is removed and the suspension side assembly portion 32 of the S / ABS 3 is assembled to the rear shaft 20, the first rubber bush 31c is prevented from being twisted when the vehicle is completed. it can.
Therefore, the amount of distortion of the first rubber bush 31c caused by the relative displacement between the vehicle body 1 side and the rear shaft 20 when the vehicle is traveling can be suppressed to a minimum, and heat generation due to the strain generated when the vehicle is traveling can be suppressed. Improves durability.

  According to the present invention, when the shock absorber is assembled to the vehicle body, it is held in the posture of the shock absorber when the vehicle is completed, and is assembled, so that when the shock absorber is assembled to the suspension member side, Since the member can be prevented from being distorted, it can be used for assembling the shock absorber of the suspension in the vehicle.

1 Body 3 S / ABS (Shock Absorber)
4 Rear wheel 5 S / ABS assembly jig
11 LH side frame (specific part of the car body)
12 RH side frame (specific part of the car body)
13 Cross member 14 Lateral bracket 15 Lateral rod 16 Dead on frame 17 Coil spring 20 Rear shaft 21 Spring seat (suspension member)
21a LH spring seat 21b RH spring seat 31 Car body side assembly part 32 Suspension side assembly part 51 Main body 52 First engagement part (bifurcated part)
52c Urethane rubber (flexible member)
53 2nd engaging part (insertion part)
54 Guide section CL1 S / ABS expansion / contraction direction axis CL2 S / ABS assembly jig axis

Claims (4)

A shock absorber assembly jig interposed between the vehicle body and the suspension member,
A first engagement portion provided on one end side of the shock absorber and engaged with a vehicle body side assembly portion for assembling the shock absorber to the vehicle body;
A second engagement portion that is provided on the other end side of the shock absorber and engages with a suspension side assembly portion that assembles the shock absorber to the suspension member;
A main body portion that connects the first engagement portion and the second engagement portion and extends in the axial direction of the shock absorber, and maintains a contracted state of the shock absorber;
The shock absorber is provided in any one of the coupling portion of the first engagement portion and the main body portion or in the first engagement portion and the main body portion, and is brought into contact with a specific part of the vehicle body. A shock absorber assembling jig, comprising: a guide portion that holds an axis of the shock absorber in a telescopic direction when assembled to a vehicle.   The first engagement portion has a bifurcated portion formed in a bifurcated shape so as to sandwich a coupling portion between the vehicle body side assembly portion and the shock absorber main body, and the second engagement portion is the suspension The shock absorber assembling jig according to claim 1, wherein the jig is configured to have a fitting portion that fits into a member-side assembly hole.   The shock absorber assembling jig according to claim 1, wherein the guide portion is formed in a symmetrical shape with respect to the axis of the main body portion.   4. The shock absorber assembly according to claim 1, wherein a flexible member is attached to a portion of the first engagement portion that comes into contact with the shock absorber. 5. Ingredients.

Images