JPS5824652Y2 - Hydraulically operated pawl clutch - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a hydraulically operated pawl clutch.

As shown in Fig. 1, the conventional pawl clutch has the same shaft center 2.
Of the output shaft 26 and input shaft 21 arranged on the output shaft 26, the fixed clutch piece 28 is attached to the output shaft 26, and the other input shaft 27
A movable clutch piece 30 that can be slid in the direction of the axis 25 guided by the sliding key 29 is attached to the movable clutch piece 30, and a horizontal shaft 32 is attached to the annular groove 31 formed in the boss portion of the movable clutch piece 30.
A pin (roller) 34 attached to a lever 33 that can swing around 0 is fitted.

According to such a conventional configuration, the clutch can be connected and disconnected by manually switching the lever 33, but this operation is not easy.

In particular, when the shaft diameters of both shafts 26, 27 become large and both clutch pieces 28, 30 also become large, it becomes difficult to operate them manually.

The present invention proposes a hydraulically operated pawl clutch that can solve the above problems, and one embodiment thereof will be described below with reference to FIGS. 2 and 3.

In the figures, the output shaft side is the same as the conventional one, so its details will be omitted.

A sleeve 4 is fixed to an end of an input shaft 2 disposed on a shaft core 1 via a key 3.

The outer periphery of this sleeve 4 has a large diameter parallel outer surface 4A extending from its tip side to the back side, and an inclined outer surface 4 having a small diameter on the back side.
B, the small diameter parallel outer surface 4C via the stepped portion, and the male screw portion 4
D and are formed in this order.

Reference numeral 5 denotes a movable clutch piece that fits externally into the sleeve 4, and its inner periphery includes a large diameter parallel inner surface 5A that can slide on the large diameter parallel outer surface 4A, and an inclined inner surface that can come into contact with and separate from the inclined outer surface 4B. 5B, and a small-diameter parallel inner surface 5C that is slidable on the small-diameter parallel outer surface 4C, and further an annular groove 6 is formed in the inclined inner surface 5B.

Here, the annular groove 6 is set such that the area of the small diameter side pressure receiving surface 6b is smaller than the area of the large diameter side pressure receiving surface 6a.

Are there O-rings on the large and small diameter sliding parts? , 8 are interposed.

The middle movable clutch piece 5 is provided with a stop bolt 9 that acts on the small diameter parallel outer surface 4C.

10 is an annular piston attached to the back side of the movable clutch piece 5, and the cylinder body 1 is screwed into the male screw portion 4D.
It fits into the annular cylinder chamber 12 formed in 1.

Reference numeral 13 indicates an oil inlet and drain port to the annular cylinder chamber 12, and reference numeral 14 indicates a locking nut.

An oil passage 15 is formed in the sleeve 4, the inner end of which communicates with the annular groove 6, and the outer end serving as an oil inlet and drain port 16.

Note that pulps 17 and 18 are attached to the amphoteric oil drain ports 13 and 16, and oil filling and draining hoses 19 and 20 can be connected to these valves 17 and 18.

FIG. 2 shows the state of clutch engagement.

That is, the annular piston 10 is pushed out by filling the annular cylinder chamber 12 from the oil filling and draining port 13, thereby the movable clutch piece 5 protrudes, and the inclined inner surface 5B is pressed against the inclined outer surface 4B.

Therefore, the rotational force transmitted from one side of the fixed clutch to the movable clutch piece 5 is transmitted to the sleeve 4 by the frictional force between both inclined surfaces 5B and 4A, and further rotates the input shaft 2 via the key 3.

Note that the fixing bolt 9 is used for safety.

When disengaging the clutch, first loosen the locking bolt 9.

Then, the annular groove 6 is filled with oil through the oil passage 15, and the annular cylinder chamber 12 is opened.

Then, since the small diameter side pressure receiving surface 6b has a larger area than the large diameter side pressure receiving surface 6a, the movable clutch piece 5 moves to the small diameter side and moves to absorb the stroke S shown in FIG. In the state shown in FIG. 3, the movable clutch piece 5 is separated from the fixed clutch piece.

As described above, according to the present invention, since the movable clutch piece is moved by hydraulic pressure, the connection and disconnection operations can be performed easily and reliably, regardless of the large diameter of the shaft or clutch piece. can.

[Brief explanation of drawings]

FIG. 1 is a front view showing a conventional example, and FIGS. 2 and 3 are longitudinal sectional front views showing an embodiment of the present invention. 1... Shaft core, 2... Input shaft, 4... Sleeve, 4
A... Large diameter parallel outer surface, 4B... Inclined outer surface, 4C...
・Small diameter parallel outer surface, 4D...Male thread part, 5...Movable clutch piece, 5A...Large diameter parallel inner surface, 5B...Slanted inner surface, 5C...Small diameter parallel inner surface, 6...Annular shape Groove, 6a・
...Large diameter side pressure receiving surface, 6b...Small diameter side pressure receiving surface, 10...
・Annular piston, 11... cylinder body, 12...
Annular cylinder chamber, 15... oil passage, 16... oil inlet and drain port.

Claims (1)

[Scope of utility model registration request] A sleeve having a large-diameter parallel outer surface, a slanted outer surface with a smaller diameter at the rear end, and a small-diameter parallel outer surface in order from the tip to the rear end is fitted onto the input shaft, and the fixed clutch on the output shaft side is attached to the tip. a large-diameter parallel inner surface capable of sliding on the large-diameter parallel outer surface, an inclined inner surface capable of contacting and separating from the inclined outer surface, and a large-diameter parallel inner surface capable of sliding on the small-diameter parallel outer surface; A movable clutch piece formed with a movable small-diameter parallel inner surface is externally fitted onto the sleeve so as to be slidable in the axial direction thereof, and a piston that presses and moves the movable clutch piece toward the tip side at the rear end of the sleeve. A cylinder body having a diameter of 100 mm is attached to the sleeve, an annular groove is formed in the inclined inner surface of the movable clutch piece in which the area of the small diameter side pressure receiving surface is larger than the area of the large diameter side pressure receiving surface, and A hydraulically operated pawl clutch characterized by having an oil path formed in an annular groove to guide hydraulic pressure.