Untitled record

[Detailed explanation of the device]

【0001】

[Industrial application field]

This idea is based on the piston and b in the power cylinder of the power steering device of an automobile. Regarding the fixed structure of the pad. [0002]

[Conventional technology]

Conventionally, in the power cylinder of the power steering device, as shown in FIG. 4, the steering link shaft A pair of annular grooves 21 and 22 are formed on the outer circumference of the 20 (rod), and inside one of the annular grooves 21. A C ring 23 protruding from the outer circumference of the steering link shaft 20 is attached to the C ring. At 23, one end 24a of the piston 24 fitted to the outer circumference of the steering link shaft 20 is thrust. The other end 24b of the piston 24 is engaged with the other annular groove 22 by crimping. By doing so, the piston 24 is fixed to the outer circumference of the steering link shaft 20. To. For a fixed structure of a piston and a rod similar to the above, for example, Japanese Patent Application Laid-Open No. 1-1730 Some are described in Gazette No. 80. [0003]

[Problems that the device tries to solve]

However, in the conventional fixed structure of the steering link shaft 20 and the piston 24, Take the C ring 23 in one of the annular grooves 21 formed on the outer circumference of the steering link shaft 20. After attaching, abut one end 24a of the piston 24 against the C ring 23, and the piston The other end 24b of the ton 24 must be crimped to engage in the other annular groove 22 The work man-hours were large and the work was not easy. [0004]

This idea was made to solve the above problems, and the efficiency of cylinder assembly work. To provide a fixed structure for pistons and rods that can improve and reduce costs at the same time. There is. [0005]

[Means for solving problems]

In order to achieve the above object, the fixed structure of the piston and rod according to the present invention is A rod having an annular groove on the outer circumference and the annular groove fitted on the outer circumference of the rod and on the inner circumference. An annular piston having an annular groove facing the surface and a small number of the piston or the rod. With one rotation, the piston is pulled between the annular grooves and the piston is axially oriented with respect to the rod. It consists of a wire that engages with. [0006]

[Action]

According to the above configuration, the fixing of the piston to the rod is the piston or the pist. Wire between the opposing annular grooves with at least one rotation of the rod to which the rod is fitted It is done by pulling in. [0007]

The wire engages with the inner circumference of the piston and the outer circumference of the rod, respectively. The piston is locked in the axial direction of the rod via the rod. [0008]

A seal member is inserted into the annular seal mounting groove formed on the outer circumference of the piston, and the seal member is inserted. The seal member closes the window hole for wire insertion opened at the bottom of the seal mounting groove. Be blocked. [0009]

[Example]

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. [0010]

Fig. 1 is a cross-sectional view showing the fixed structure of the piston and rod, and Fig. 2 is along the AA line of Fig. 1. FIG. 3 is a sectional view showing a state before the start of wire insertion having the structure of FIG. To. [0011]

Reference numeral 1 denotes a rod, and an annular groove 2 having a semicircular cross section and the annular groove on the outer peripheral surface of the rod 1 A wire engaging hole 3 for hooking a wire that opens at the bottom of 2 is formed. [0012]

Reference numeral 4 denotes an annular piston, and an annular sea having a rectangular cross section is provided on the outer peripheral surface of the piston 4. An annular groove 6 having a semicircular cross section is formed on the inner peripheral surface of the mounting groove 5, and these are formed. The window hole portion 7 for inserting a wire that opens at the bottom of the seal mounting groove 5 and the annular groove 6 is described above. It is drilled in the piston 2. [0013]

8 is a wire, and the piston 4 is fitted to the outer circumference of the rod 1 and faces each other. It is inserted between the annular grooves 2 and 6 so that the piston 4 is axisd with respect to the rod 1. Locked in the direction. [0014]

In the above configuration, fixing the piston 4 to the rod 1 is the outer circumference of the rod 1. The piston 4 is fitted into the wire, and the window hole 7 for inserting the wire faces the wire engagement hole 3. After the annular grooves 2 and 6 are arranged to face each other, the wire engaging hole is passed through the window hole 7 for inserting the wire. Piston 4 or rod 1 by hooking the hooking portion 8a formed at the tip of the wire 8 on 3. At least one of them is rotated, thereby pulling the wire 8 between the annular grooves 2 and 6. Do it by muting. [0015]

The wire 8 is formed with an appropriate length to be inserted over the entire length between the annular grooves 2 and 6. If so, the above piston fixing work is completed by pulling in the wire 8. Wire 8 When it is longer than the appropriate length, the tip of the wire 8 drawn between the annular grooves 2 and 6 Reappears in the window hole 7 for wire insertion, and is stored in the annular groove 2 on the rod 1 side. The rear end of the wire 8 may be cut so as to be round. [0016]

The wire 8 is formed in a ring shape, and the inner peripheral side of the wire 8 is the rod 1 side. The outer peripheral side engages with the annular groove 6 on the piston 4 side, respectively. This wai The piston 4 is locked in the axial direction of the rod 1 by the ya 8. [0017]

A seal portion (not shown) in the annular seal mounting groove 5 formed on the outer circumference of the piston 4 The material is inserted. A wai opened at the bottom of the seal mounting groove 5 by this seal member. The window hole 7 for insertion is closed. [0018]

[Effect of the device]

As described above, the present invention fits a rod having an annular groove on the outer circumference and the outer circumference of the rod. An annular piston that is combined and has an annular groove facing the annular groove on the inner circumference, and the piston. The rod is pulled between the annular grooves by at least one rotation of the rod or the rod. It consists of a wire that locks the piston in the axial direction with respect to the piston. The ton can be securely fixed to the outer circumference of the rod by making it immovable in the axial direction of the rod. [0019]

In addition, the piston is fixed by fitting the piston to the outer circumference of the rod and then ringing both. All you have to do is pull the wire between the grooves, and you can install the conventional C ring and tighten the piston. The work is easier and requires less man-hours than in the case of. [0020]

Therefore, according to this device, the efficiency of cylinder assembly work can be improved and the cost can be reduced. You can plan at the same time.

[Simple explanation of drawings]

[Figure 1]

It is sectional drawing which shows the fixed structure of a piston and a rod which becomes an Example of this invention.

[Figure 2]

It is sectional drawing which follows the AA line of FIG.

[Fig. 3]

It is sectional drawing which shows the state before the start of wire insertion which has the structure of FIG.

[Fig. 4]

It is sectional drawing which shows the fixed structure of a piston and a rod which becomes a conventional example.

[Explanation of symbols]

1 rod 2 annular groove 4 piston 6 annular groove 8 wire