JP3104267B2 - How to lock rod and piston - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for locking a rod and a piston.

[0002]

2. Description of the Related Art Conventionally, as a method for locking a rod and a piston, there is a method shown in FIG. In this prior art, a screw member 72 is engaged with one end of a rod 71 by a pin 73, and a nut 74 is screwed into a screw portion of the screw member 72. This is arranged in the space 76 of the piston 75, and the plate 77 is fixed to the lower part of the piston 75 with a screw (not shown) or the like. Further, a pin 78 is engaged between the nut 74 and the plate 77, so that the rod 71 and the piston 75 cannot be relatively rotated.

In the prior art shown in FIGS. 6 and 7,
A plate 83 having an insertion hole 81 and a holding hole 82 is fixed to a lower portion of the piston 84 by a screw member or the like (not shown).
Next, a rod 87 having a small diameter portion 85 and a large diameter portion 86
Of the piston 84 into the space 88 of the piston 84 through the insertion hole 81.
Insert Thereafter, the small-diameter portion 85 is slid into the holding hole 82 to connect the plate 83 and the rod 87 .

Incidentally, reference numeral 89 denotes a cylinder, and 90 denotes a sealing means.

[0005]

However, the prior art shown in FIG. 5 described above requires a large number of man-hours for assembling and has a disadvantage that adjustment between the screw member 72 and the nut 74 is required. Have.

In the prior art shown in FIGS. 6 and 7,
The rod and the piston are relatively rotatable and have a disadvantage that the sealing performance of the sealing means 90 is adversely affected.

Accordingly, it is a technical object of the present invention to make it possible to easily lock a rod and a piston in a state where relative rotation is impossible.

[0008]

Configuration of the Invention

[0009]

A first technical means of the present invention taken to solve the above-mentioned technical problem of the present invention is to fix a plate having an insertion hole and a holding hole at a lower portion of a piston. Then, the large diameter portion of the rod having a small diameter portion and a large diameter portion is inserted through the insertion hole, and the small diameter portion is
And slide it toward the center of the holding hole.
Then, the piston and the cylinder are fitted and the press
Key means is disposed between the
The ton and the rod cannot be rotated relative to each other.

A second technical means of the present invention taken to solve the above-mentioned technical problem of the present invention is to fix a plate having an insertion hole and a fitting hole at a lower portion of a piston,
Next, the large-diameter portion of the rod having the fitting portion and the large-diameter portion is inserted through the insertion hole, and the fitting portion is fitted with the fitting portion.
Slide into the hole, then the piston and cylinder
And the play portion is fitted to the fitting portion of the rod.
The piston and the rod rotate relative to each other
It is impossible to roll .

[0011]

According to the first and second technical means of the present invention described above, the rod is easily locked on the piston, and the two are assembled so that they cannot rotate relative to each other.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment embodying the technical means of the present invention will be described below with reference to the accompanying drawings.

FIGS. 1 and 2 show a method of locking a rod and a piston according to a first embodiment of the present invention.

First, a plate 13 having an insertion hole 11 and a holding hole 12 is fixed to a lower portion of a piston 14 by a screw member or the like (not shown). Next, the small diameter portion 15 and the large diameter portion 16
Is inserted into the space 18 of the piston 14 through the insertion hole 11. Thereafter, the small-diameter portion 15 is slid into the holding hole 12 so that the plate 13 and the rod 17
Are engaged by the key means 19 so that relative rotation is impossible.

[0015] The piston 14 and the cylinder 20 are fitted together.
Between the screw member 72 and the nut 74 shown in FIG.
No adjustment is required, and the piston 14 is automatically centered.
Can be locked. Therefore sealing means
21 can be eliminated.

Next, in FIGS. 3-4, the present invention second
A method of locking the rod and the piston according to the embodiment will be described.

First, a plate 33 having an insertion hole 31 and a fitting hole 32 is fixed to a lower portion of a piston 34 by a screw member (not shown) or the like. Next, the fitting portion 35 and the large diameter portion 36
Is inserted into the space 38 of the re-piston 34 through the insertion hole 31. After that, the fitting portion 35 is slid into the fitting hole 32 and the plate 33 and the rod 37 are moved.
And make relative rotation impossible.

The fitting portion 35 provided on the rod 37 and the press
Play with the rod 37 through the fitting hole 32 provided in the
The key 33 provided in the first embodiment is fitted by fitting the
Means 19 are not required.

When the piston 34 and the cylinder 40 are fitted together,
Between the screw member 72 and the nut 74 shown in FIG.
No adjustment is required, and the piston 34 is automatically centered.
Can be locked. Therefore sealing means
41 can be eliminated.

[0020]

As described above, in the present invention, the rod only has to be slid after being inserted into the plate fixed to the piston, and the rod is easily locked to the piston.

[0021]

[Brief description of the drawings]

[0022]

FIG. 1 is a top view showing an engagement state between a rod and a plate according to a first embodiment of the present invention.

[0023]

FIG. 2 is a sectional view showing a state where a rod and a piston in FIG. 1 are locked.

[0024]

FIG. 3 is a top view of a rod and a plate in an engaged state according to a second embodiment of the present invention.

[0025]

FIG. 4 is a sectional view showing a state where the rod and the piston in FIG. 3 are locked.

[0026]

FIG. 5 shows a cross-sectional view of a prior art method of locking a rod and a piston.

[0027]

FIG. 6 is a top view showing a state of engagement between a rod and a plate according to the related art.

[0028]

FIG. 7 is a sectional view showing a state where the rod and the piston in FIG. 6 are locked.

[0029]

[Description of Signs] 11, 21 Insertion hole 12 Holding hole 13, 33 Plate 14, 34 Piston 15 Small diameter portion 16, 36 Large diameter portion 17, 37 Rod 19 Key means 20 cylinder 32 Fitting hole 35 Fitting portion 40 cylinder

──────────────────────────────────────────────────続 き Continuation of the front page (56) References Open to the public Showa 53-12986 (JP, U) Open to the public Showa 53-159485 (JP, U) Open to the public Showa 60-59865 (JP, U) Open to the public Showa 51- 119447 (JP, U) Japanese Utility Model Showa 55-85542 (JP, U) Japanese Utility Model Showa 51-47994 (JP, Y2) Japanese Utility Model Utility Model 54-21771 (JP, Y2) (58) Field surveyed (Int. ⁷ , DB name) F16J 1/12 F15B 15/14 375

Claims (2)

(57) [Claims] 1. A plate having an insertion hole and a holding hole is fixed to a lower portion of a piston, and the large diameter portion of a rod having a small diameter portion and a large diameter portion is inserted from the insertion hole ;
Slide the small diameter portion toward the center of the holding hole.
After that, the piston and the cylinder are fitted, and
Disposing key means between the plate and the rod
That the piston and the rod cannot be rotated relative to each other.
Characteristic locking method of rod and piston. 2. A plate having an insertion hole and a fitting hole is fixed to a lower portion of the piston, and then the large diameter portion of a rod having a fitting portion and a large diameter portion is inserted from the insertion hole ;
Slide the fitting portion toward the fitting hole,
Then, the piston and the cylinder are fitted and the lock is
By the fitting part of the plate and the fitting hole of the plate,
A method for locking a rod and a piston, wherein the rod and the rod cannot be rotated relative to each other .