JPS602964Y2 - Assembling parts for shock absorbing spring shackle in automobiles - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a shock absorbing spring shackle assembly for an automobile, which is formed by firmly connecting a shackle plate and a shackle pin in an abbreviated shape when viewed from the side.

Conventionally, the shackle plate and the shackle pin have been manufactured separately and assembled, but recently, in order to reduce the cost of the assembly process, it has become common to fix the two in advance and then assemble them.

There have been three conventional methods for fixing the shackle plate and the shackle pin.

The first method is to weld the outer circumference of the shackle pin itself by electric welding, and the second method is to form a knurling on the shackle pin and press fit the knurling part into the hole of the shackle plate to fix it, that is, knurling. processing method,
A third method is to make the hole in the shackle plate a square or hexagonal polygon, and make the shackle pin have the same cross-sectional shape to fit.

However, each of the above methods had the following shortcomings.

First of all, according to the first electric welding method, distortion occurs due to thermal stress, and special external treatment is required to correct the angle of the shackle plate and shackle pin and remove defects caused by heat seizure, which does not increase costs. Inevitable.

Next, according to the second knurling method, the connection is extremely weak with respect to the force in the direction opposite to the collar of the shackle pin, that is, in the direction opposite to pin driving, and the fixation is unstable.

This can have serious consequences if it moves or becomes dislodged during transport prior to assembly or during assembly handling.

In order to deal with this, the material of the shackle pin needs to be a special high-grade alloy steel (usually containing one or more rare elements such as nickel, chromium, molybdenum, vanadium, manganese, etc.) and special heat treatment is required. There were drawbacks such as an excessive increase in expenses.

Next, according to the third polygonal fitting method, in a shackle mechanism that requires high precision because the punching die for the shackle plate is worn out and high precision is required, the die manufacturing cost and die installation cost are reduced by the round shape. This was significantly disadvantageous compared to punching holes.

Conventionally, in order to create a buffer spring shackle mechanism by combining two shackle plates and two shackle pins as described above, after inserting and fixing two shackle pins into one shackle plate from the same direction, They were assembled by inserting the circular holes in the other shackle plate into the threaded ends of the shackle pins.

However, in this case, two types of combination parts are required: one part in which two shackle pins are fixed to one shackle plate, and the other shackle plate to be connected to this part.

Therefore, manufacturing costs are high and handling during assembly is not easy.

Furthermore, in this case, since the tip of the shackle pin does not have any stepped portion against which the shackle plate comes into contact, it is difficult to specify the distance between the two shackle plates during assembly. .

The present invention has been made to solve the above-mentioned problems, and provides an assembly part for a shock absorbing spring shackle for an automobile, in which a shackle plate and a shackle pin are firmly connected in an abbreviated shape when viewed from the side. By using two sets of one type of assembly parts, it is possible to easily assemble a shock absorbing spring shackle for an automobile.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a plan view of the shackle plate 1.

A large-diameter circular hole 2 into which a shackle pin 4 (described later) can be press-fitted is bored on one end side of the shackle plate 1, and a small-diameter circular hole 2 into which a small-diameter portion 6 of a shackle pin 4 (described later) can be inserted into the other end side. 3
are precisely punched by punching with a press or the like.

FIG. 2 is a plan view of the shackle pin 4.

A collar 5 is provided at one end of the shackle pin 4 by header machining, and a narrow diameter section 6 is formed with a stepped section 6a at the other end, and a threaded section 7 is formed at the tip of the narrow diameter section 6.
is provided.

Furthermore, knurling 8 is formed at the lower part of the neck of the collar 5.

The lower part of the neck of this shackle pin 4 is press-fitted into a large-diameter circular hole 2 formed in the shackle plate 1 as shown in FIG. 3 to form a shock absorbing spring shackle assembly part 9 having an oval shape in side view.

In this case, as shown in FIG. 4, a headband groove 10 concentric with the central axis of the shackle pin 4 is formed on the periphery of the large diameter circular hole 2 using a press or the like, and the large diameter circle of the shackle plate 1 is Hole 2
By compressing the periphery of the shackle pin 4 toward the shackle pin 4 side and biting the inner peripheral surface of the large diameter circular hole 2 of the shackle plate 1 into the knurled notches 8 of the shackle pin 4, as shown in FIG.
The shackle plate 1 and the shackle pin 4 are tightly secured.

In this way, the knurling notches 8 provided on the shackle pin 4 are press-fitted into the large-diameter circular hole 2 of the shackle plate 1 over the entire thickness of the shackle plate 1, and are engaged with each other to form a tight connection. is also firmly connected in the opposite direction of pin driving.

Note that the tightening of the shackle plate 1 and the shackle pin 4 is not limited to forming the headband groove 10 shown in FIG. A groove may also be formed.

Next, in order to assemble a shock absorbing spring shackle for an automobile using the assembly parts 9 assembled as described above, as shown in FIG. Placed symmetrically, one assembly part 9
Insert the small diameter part 6' of the shackle pin 4' of the other assembly part 9' into the small diameter circular hole 3 bored on the other end side of the shackle plate 1, and insert the small diameter part 6' of the shackle pin 4' of the other assembly part 9' into the stepped part 6'a of the small diameter part 6'. The shackle plate 1 of one assembly part 9 is brought into contact and the nut 13 is tightened on the threaded portion 7', and the other shackle plate 1' and one shackle pin 4 are similarly tightened to assemble.

An automobile chassis and a buffer spring are connected between the shackle plate 1 and the shackle pin 4 on one side, and between the shackle plate 1' and the shackle pin 4' on the other side.

As explained above, in the present invention, the lower part of the neck of the shackle pin 4 is press-fitted into the large-diameter circular hole 2 of the shackle plate 1, the peripheral edge of the neck is compressed against the shackle pin 4, and the inner peripheral surface of the shackle pin 4 is compressed. Since it bites into the knurling 8 of the pin 4 and is tightly fixed, the shackle plate 1 and the shackle pin 4 are firmly and closely connected.

Therefore, the axial torque in the rotational direction increases, and the shackle pin 4 is firmly connected in the direction opposite to the driving direction, and does not come off.

Furthermore, the material of the shackle pin 4 can be ordinary, inexpensive carbon steel, and it does not require any special heat treatment, so it can be manufactured at low cost.

Furthermore, since the shackle plate 1 and the shackle pin 4 are combined in an oval shape when viewed from the side, a large number of one type of shock absorbing spring shackle assembly parts 9 formed in this way are manufactured, and these assembly parts 9 are The shock absorbing spring shackle can be easily completed by simply assembling the two sets by arranging them point-symmetrically to each other as a pair, reducing manufacturing costs and facilitating handling during assembly.

Further, since the shackle plate 1 and the shackle pin 4 are assembled in advance to form one component, component management during storage, transportation, etc. is easy.

Furthermore, by having a collar 5 at one end of the shackle pin 4 and a stepped portion 6a at the other end to form a narrow diameter portion 6, the two sets of assembly parts 9 and 9' can be made into a pair and symmetrical with respect to each other. When arranging and assembling, the distance between the two shackle plates 1, 1' can be easily defined.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the shackle plate according to the present invention, Figure 2 is a plan view showing the shackle plate according to the present invention;
The figure is a plan view of the shackle pin, Figure 3 is a side view showing the state in which the shackle plate and shackle pin are tightened and fixed, Figure 4 is a sectional view taken along the line IV-IV in Figure 3, and Figure 5 is another embodiment. FIG. 6 is a sectional view similar to FIG. 4 showing VI of FIG.
-Vl line sectional view and FIG. 7 are plan views showing a state in which the buffer spring shackle is assembled using two sets of assembly parts. 1.1'...Shackle plate, 2...Large diameter circular hole, 3...Small diameter circular hole, 4,4'...
・Shackle pin, 5.5'...Tsuba, 6,6'
...Thin diameter part, 6a, 6a'...Step part,
7, 7'...Threaded part, 8...Knurling, 9.9'...Buffer spring shackle assembly parts, 10...Hachimaki groove , 11...
...Chrysanthemum groove, 13...Natsuto.

Claims (1)

[Scope of utility model registration request] A shackle pin having a flange at one end, a stepped part at the other end to form a narrow part, a threaded part at the tip, and a knurling at the lower neck of the shackle; A large-diameter circular hole into which the shackle pin can be press-fitted is bored at one end, and a small-diameter circular hole into which the narrow part of the shackle pin can be inserted is bored at the other end, and the shackle is inserted into the large-diameter circular hole. A shackle in which the lower part of the neck of the pin is press-fitted, its periphery is compressed against the shackle pin, the flesh of the inner peripheral surface is bitten into the knurling, and is tightly fixed, so that it is combined with the shackle pin in an abbreviated shape when viewed from the side. An assembly part for a shock absorbing spring shackle in an automobile, characterized by comprising a plate.