JPH0223733B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pawl clutch that facilitates the fitting operation.

(Prior Art) Conventional pawl clutches are designed to be fitted after aligning the recesses and protrusions of the driving and driven pawls, and cannot be fitted unless the angles are matched.

(Problems to be Solved by the Invention) For this reason, in the conventional pawl clutch, inching is required to adjust the angle when the clutches are fitted, which is time-consuming and cannot be easily controlled remotely. The object of the present invention is to provide a pawl clutch that does not require troublesome angle adjustment.

(Means for Solving the Problems) The pawl clutch of the present invention is slidably supported in the axial direction on a rotating shaft, and has two movable flanges, an inner and an outer one, each having a claw on the side surface, and an inner and outer claw of the movable flange. a non-movable flange coaxially with the rotating shaft and rotatable with respect to the rotating shaft; a stopper cylinder slidably supported on the rotating shaft; It consists of a compression spring placed between each of the moving flanges and the butt.
The angular range in which the protrusions of the outer claws of the movable and non-movable flanges abut against each other and the angular range in which the protrusions of the inner claws abut against each other do not overlap but are shifted from each other.

(Function) When engaging the clutch, move the stopper forward,
The inner and outer springs bias the inner and outer moving flanges toward the non-moving flanges. At this time, suppose, for example, that the protrusions of the external claws abut against each other. In this case, the angular range in which the protrusions of the outer claws of the movable and non-movable flanges abut against each other and the angular range in which the protrusions of the inner claws abut against each other do not overlap, but are shifted.
As for the inner claws, the convex portions do not abut against each other, and therefore only the inner movable flange advances toward the non-movable flange, and the inner claws fit into each other. For the outer moving flange, the outer spring is compressed and left behind.

On the other hand, if the protrusions of the inner claws touch each other,
Only the outer moving flange advances toward the non-moving flange, and the outer claws mate with each other. For internal moving flanges,
The inner spring is compressed and left behind.

(Example) To explain the clutch of a winch as an example, in FIG. 1, reference numeral 1 is a rotating shaft driven by a motor (not shown). Reference numeral 2 is a movable flange, which is divided into two parts, an inner flange and an inner flange 2a.
is attached to the rotating shaft 1 with the feather key 3, and the outer flange 2b
are supported by feather keys 4 on the inner flanges 2a, respectively, so that these flanges can be individually slid in the axial direction of the rotating shaft 1.

A second
As shown in the figure, claws 5 are formed respectively, and the angular relationship between the inner claws 5a and the outer claws 5b is in the same phase.

Reference numeral 6 denotes a non-movable flange rotatably supported on the rotating shaft 1, and a rope drum 7 is fixed to this. On the side of this flange, there is a third
As shown in the figure, the claws 8 are formed twice, inside and outside, and the inner claws 8a correspond to the inner claws 5a of the movable flange, and the outer claws 8b correspond to the outer claws 5b of the movable flange.
The angular relationship between the inner claw 8a and the outer claw 8b is 90 degrees out of phase.

Reference numeral 9 denotes a stopper cylinder located behind the movable flange 2, and is supported on the rotating shaft 1 by a feather key 3 common to the movable flange 2. A groove 10 is formed on the outer periphery of the shifting tube 9, and a pin 12 at the end of the operating lever 11 is engaged with this groove. This lever 1
1 to the left and right around the fixed point 13, the stopper tube 9 moves back and forth along the key 3.

Compression springs 14a, 14b are placed between the inward/outward movable flanges 2a, 2b and the stopper tube 9, respectively.

As shown in FIG.
5a, 15b extend, and their tips reach into the holes 16a, 16b of the inward/outward moving flanges. The diameter of the tip of the rod is large to prevent it from falling out of the hole. Due to these rods, the distance between the inner and outer movable flanges 2a, 2b and the stopper tube 9 does not become larger than a predetermined value.

Reference numeral 17 in FIG. 6 is an L-shaped cam, whose central portion is pivotally connected to the stopper tube 9 through a pin 18, and rotates around the pin.

As shown in FIG. 1, when the clutch is disengaged, the drum 7 does not rotate even if the rotating shaft 1 rotates. To engage the clutch, the operating lever 11 is rotated from the solid line to the position shown in chain lines in FIG. Then, the internal and external movable flanges 2 are each pushed toward the non-movable flange 6 via the springs 14.

Now, the non-moving flange 6 and the moving flange 2 are
Assume that there is a relative positional relationship as shown by S in FIG. In this state, the inner claws 5b and 8a have their protrusions and recesses aligned (that is, the protrusions do not overlap each other), so they are ready to fit together, but the outer claws 5b and 8a
8b cannot be fitted because the convex portion and the concave portion do not match. Therefore, the tips of the convex portions of the outer claws 5b and 8b of the outer movable flange 2b abut against each other, and the outer moving flange 2b cannot move forward any further, and the outer spring 14b contracts. On the other hand, the inner moving flange 2a continues to move forward, and the inner claws fit into each other.

Incidentally, when the movable flange 2 cannot be pushed completely by the spring 14 alone, the cam 17 shown in FIG. 6 is activated. That is, when the moving tube 9 is moved forward, the cam 17 moves as follows.
The outer end 19b comes into contact with the outer flange 2b, rotates clockwise in the figure, and the inner end 19a protrudes forward. The inner flange 2a is the inner end 19a of this cam.
Pushed forward.

Next, when the rotating shaft 1 is driven, only the movable flange 2 rotates at first, and when the movable flange reaches the position shown by T in FIG. Drum 7 begins to rotate.

In this clutch, when the movable flange 2 reaches the T position shown in FIG. 7, the convex portions and concave portions of the external pawls 5b and 8b match. Therefore, the outer flange 2b is pushed forward by the spring 14b, and the outer claws 5b and 8b are fitted together. The outer claws 5b, 8b fitted in this manner come into contact with each other in their protrusions when the rotating shaft 1 is reversed, and transmit power instead of the inner claws 5a, 8b.

Similarly, when the relative relationship between the movable and non-movable flanges 2 and 6 is in the U state shown in FIG.
8b is fitted and the moving flange 2 is driven,
As shown by V in the figure, the non-movable flange 6 rotates as the convex portions of the external claws come into contact with each other. In this V state, the spring 14a and the inner end 19 of the cam 17
a, the inner flange 2a moves forward, and the inner claw 5
a and 5b also fit together.

When disengaging the clutch, the operating lever 11 is rotated to the opposite side to move the stopper cylinder 9 backward. When the stopper moves backward, the movable flange 2 is moved through the rod 15.
Also, the inner and outer claws 5 and 8 are separated.

In the embodiments described so far, the angles of the inner and outer claws are in the same phase for the moving flange 2, and for the non-moving flange 6.
Although they are offset by 90 degrees, the present invention is not limited thereto. In short, the inner and outer claws of at least one of the moving flange and the non-moving flange are arranged so that the convex portion and the recess of at least one of the inner and outer claws match, regardless of the relative angular positions of the moving flange and the non-moving flange. It is sufficient if the phase of the two is shifted. For example, the same effect can be obtained by shifting the angle of the inner and outer claws by 45 degrees for the moving flange and 45 degrees for the non-moving flange on the opposite side.

(Effects) As explained above, in the pawl clutch of the present invention, no matter what angle range the movable flange and non-movable flange are, either the inner or outer pawl engages by simply moving the stopper forward, and power is generated. can be transmitted, which is typical of conventional pawl clutches. No inching required when mating.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a longitudinal sectional view of the pawl clutch, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. B-
4 is a sectional view taken along line C-C in FIG. 1, FIG. 5 is a sectional view taken along line D-D in FIG. 4, and FIG. Cross-sectional views taken along line E-E in the figure, Figures 7 and 8 are B-B in Figure 1.
FIG. 2 is an explanatory diagram showing the action of the clutch seen along a line. 1...Rotating shaft, 2...Inner moving flange, 5...
Claw, 6...Non-moving flange, 8...Claw, 9...Jump tube, 14...Spring.

Claims (1)

[Claims] 1. Two movable flanges 2a, 2b, an inner and an outer side, which are slidably supported in the axial direction on the rotating shaft 1 and have claws 5a, 5b on the side surfaces, and claws 8a, 8b that engage with the inner and outer claws of the movable flanges, respectively. a non-movable flange 6 that is coaxial with the rotating shaft and rotatable with respect to the rotating shaft; a stopper 9 that is slidably supported on the rotating shaft; Compression springs 14a and 14b are respectively placed between the movable and non-movable flanges, and the angular range in which the protrusions of the outer claws 5b and 8b of the movable and non-movable flanges abut, and the inner claw 5a ,8a
A pawl clutch in which the angular ranges where the protrusions meet do not overlap but deviate from each other.