JPS6037230Y2 - Shock absorber assembly device - Google Patents

Description

[Detailed description of the invention] The present invention relates to a device for automatically assembling a coil spring to a shock absorber body with a specified tightening torque in a MacPherson slat type shock absorber that constitutes an automobile suspension. It is.

As shown in Figure 1, the MacPherson suspension that constitutes the suspension of an automobile has a disk H at the lower end.
A fixed spring seat C is fixed to an absorber body A having This is a structure in which a coil spring E is interposed between C and C with a precompression force applied thereto.

When assembling a shock absorber with such a structure, first a precompression force is applied to the coil spring, and then the nut G is tightened with a nut runner. Since the spring seat D also rotates together, some method must be taken to prevent the spring seats from rotating together.

Conventionally, the movable spring seat D is manually rotated to engage the end of the coil spring E to align the ends, but this process not only takes time but also There were some disadvantages in that there were variations in position, and when the compressed coil spring E was restored, it misaligned with the movable spring seat D, and the coil spring E came off from the movable sprinkle seat D.

The purpose of the present invention is to eliminate such conventional problems.The feature is that when the nut runner is tightening the nut, the socket guide member of the nut runner is directly or indirectly opposed to the movable spring seat, and the movable spring Rotating torque is applied to the seat under pressure to automatically prevent co-rotation by engaging the end of the coil spring, improving work efficiency and always applying a constant pre-compression force to the coil spring. The aim is to ensure automatic assembly.

An embodiment of the present invention will be described below with reference to FIG.

1 is a machine frame, and 2 is a support portion of the absorber body A.

Reference numeral 3 designates a clamp claw of the absorber body A supported by this support portion, which can be clamped and unclamped by a clamp cylinder 4.

5 is a pair of parallel guide posts. The guide post 5 is supported by the support portion 2 and is arranged along an axis parallel to the expansion/contraction axis of the absorber shaft B in the absorber A clamped by the clamp claw 3.

A coil spring precompression device 6 is slidably guided and supported by a compression cylinder 8 on this guide post 5 .

This coil spring precompression device 6 includes a plate 6a that is slidably guided by the guide post 5, and is rotatably supported by the plate 6a along an axis parallel to the guide post 5, and is movable by an operation cylinder (not shown). Rotating axis 1
4, and a retaining member 7 that protrudes from the rotating shaft 14 in a direction perpendicular to the axis of the rotating shaft 14 and engages the coil spring E in the compression direction. The engaging member 7 is configured to engage with and disengage from the coil spring E.

Further, a nut runner 9 is supported on the guide post 5 so as to be movable forward and backward.

Reference numeral 10 denotes a support member that slidably supports the nut runner 9 on the guide post 5.

This nut runner 9 is engaged with an advancing/retracting cylinder 11 fixed to the machine frame 1.

Further, the socket 13 of the nut runner 9 that fits into the nut G at the end of the absorber shaft B is guided by a socket guide member 12 fixed to the support member 10 so as to be rotatable and relatively movable in the axial direction. The rotary drive shaft is engaged in the rotational direction by a key and a keyway, and is engaged in the axial direction so as to be relatively movable, and is always pressed to the forward end by a spring (not shown).

Furthermore, a contact pressure surface 12a is formed on the end surface of the socket guide member 12, which contacts the upper support F (or movable spring seat D) at the end of the absorber shaft B.

Next, the operation of the above configuration will be explained.

The absorber body A is supported by a support part 2 and clamped by a clamp claw 3.

Next, the coil spring E is set on the fixed spring seat C, and the engaging member 7 of the coil spring preload device 6 is set.
The rotating shaft 14 is rotated to engage the coil spring E in the compression direction, and the compression cylinder 8 is actuated to apply a required precompression force to the coil spring E.

Next, the movable spring seat D is attached to the end of the absorber shaft B by engaging it in the rotational direction.

This engagement in the rotational direction is achieved by a structure in which the round shaft at the end of the absorber shaft B is chamfered to form an oval shaft, and the movable spring seat D has an oval hole.

Furthermore, the upper support F is placed on the movable spring seat D.
, and temporarily screw the nut G onto the threaded shaft at the end of the absorber shaft B.

Next, the nut runner 9 is moved by the advance/retreat cylinder 11.
move forward.

Due to this forward movement of the nut runner 9, the socket 13
is fitted into the temporarily fixed nut G, and moves relative to the forward movement of the socket guide 12.

The contact pressure surface 12a formed on the socket guide 12 at the forward end of the nut runner 9 contacts the upper support F,
The upper support F and the movable spring seat D are pressed to bring the movable spring seat D into pressure contact with the coil spring E.

After that, by starting the nut runner 9 and rotating the socket 13, the temporarily tightened nut G is moved in the tightening direction, and the socket 13 is also moved by the forward pressing force of the spring. move forward with

When the nut G applies a tightening force to the movable spring seat D, the rotational force of the nut G is transmitted to the absorber shaft B, which rotates the movable spring seat D.

The movable spring seat D is formed with a protrusion that engages with the end of the coil spring E, and when the movable spring seat D rotates as required, it engages with the end of the coil spring E to restrict rotation.

Therefore, from this point on, the absorber shaft B is connected to the nut G.
The nut G is tightened with a predetermined tightening torque by the nut runner 9, and the coil spring E is assembled under a predetermined precompression force.

As described above, the present invention applies a precompression force to a coil spring assembled to a shock absorber using a coil spring precompression device that includes an engagement member that engages the coil spring and a compression cylinder. The nut that tightens the given coil spring is automatically tightened with a predetermined tightening torque by the nut runner, and sometimes the nut is tightened by a movable contact surface formed on the socket guide of the nut runner. Since the spring seat is pressed against the end of the coil spring, the tightening rotation of the nut is transmitted to the movable spring seat via the absorber shaft, the movable spring seat is engaged with the end of the coil spring, and the absorber shaft It is possible to reliably prevent the coil springs from rotating together, to automate the assembly of the coil springs, and to perform the assembly while always applying a constant precompression force to the coil springs.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a MacPherson type suspension for an automobile assembled using the device of the present invention, and FIG. 2 is a front view of the device of the present invention. A... Shock absorber body, B...
・Absorber shaft, C...Fixed spring seat, D...Movable spring seat, E...
...Coil spring, F...Upper support, G...Nut, H...Disk, 1...Machine frame, 2... ...Support part, 3...
... Clamp claw, 4 ... Clamp cylinder, 5 ... Guide post, 6 ... Coil spring precompression device, 7 ... Support member , End...Compression cylinder, 9... Nut runner 10... Support member, 11... Advance/retreat cylinder, 12... Curved socket guide, 12a...・
...pressure surface, 13...socket.

Claims (1)

[Scope of utility model registration request] Equipped with a fixed spring seat on the outer diameter of the absorber body,
A movable spring seat facing the fixed spring seat is fixed to the outer end of the absorber shaft which is extendably fitted to the absorber body with a coaxial core line, and a coil spring is inserted between the fixed spring seat and the movable spring seat. A device for assembling an interposed shock absorber by applying a precompression force to the coil spring, the device comprising: a clamp support device for the absorber body;
A guide post arranged with an axis parallel to the expansion/contraction axis of the absorber shaft, and a compression cylinder slidably guided and supported by the guide post, and interposed between the fixed spring seat and the movable spring seat. a coil spring precompression device including an engaging member that engages the coil spring in a compression direction and is removably connected to the coil spring; A shock absorber assembly device comprising a movable spring seat attached to a nut runner and a nut runner having a contact pressure surface that directly or indirectly contacts a movable spring seat and a socket for tightening a nut at the outer end of the absorber shaft.