JPH08118243A - Ratchet wrench - Google Patents

Abstract

PURPOSE: To carry out the assembling work of a rachet wrench simply, by providing a compression coil spring operating parallel to the sliding direction between a slide lock and a wrench main body, and engaging claws to a ratchet tooth by its elastic energizing force. CONSTITUTION: A slide lock 5 has a run off 7 along the outer periphery of a wrench socket 1 at the center at the front side, and has two claws 6 engaged with a ratchet tooth 2 at the lower side. The slide lock 5 is provided slidable in a penetrating slide hole 12 so as to cross a part of the outer periphery of the wrench socket 1 at the center side part of the wrench main body 10. A semicircular cutting form of spring bearing shelf 13 is provided at the rear side center on one side surface of the sliding hole 12. While a semicircular projection form of spring presser 8 to fit to the spring bearing shelf 13 is provided at the rear side center on one end of the slide lock 5, a recess 9 is formed almost at the same place as the spring bearing shelf 13. A compression coil spring 14 is provided between the spring bearing shelf 13 and the spring presser 8, so as to engage the claws 6 to the retchet tooth 2.

Description

Detailed Description of the Invention

The present invention relates to a ratchet wrench.

[0002]

2. Description of the Related Art Conventionally, there are many ratchet wrenches having various structures used for vehicle maintenance and assembling work of mechanical parts.

For example, Japanese Unexamined Utility Model Publication No. 6-42070 discloses the configuration shown in FIGS.
The conventional ratchet wrench shown in FIG. 1 has a ratchet tooth 2 of a socket 1 rotatably provided on a wrench body 10, and a cylindrical pawl 34 for feeding ratchet teeth is provided with a wrench body 10 of the wrench body 10 with respect to the socket 1. The handle 17 is biased obliquely by a coil spring 33 supported by a spring stopper 32 using a claw sliding hole 31 provided obliquely from the center of the side surface.
On the other hand, the angle can be arbitrarily changed by using the screw 28.

The conventional ratchet wrench shown in FIG. 8 has been devised as an improvement of the one shown in FIG. 7. This ratchet wrench has the following features: (1) a socket having ratchet teeth 2 in the peripheral portion; 1, a wrench having a slide lock 5 provided with a pawl 6 for engaging the ratchet teeth 2 with a supporting portion 4 rotatably supporting the socket 1 and providing the socket 1 with a direction of rotation. The cross section perpendicular to the moving direction of the hole 12 and the slide lock 5 fitted into the hole has a structure having at least the opposite side parallel to the rotation surface of the socket 1.

(2) A socket 1 provided with ratchet teeth 2 in a peripheral portion, and a support 4 for rotatably supporting the socket 1
Slide lock 5 provided with a pawl 6 for penetrating the ratchet teeth 2 and engaging the rotation of the socket 1 with directionality.
The handle 17 is connected to the wrench body 10 via the hinge structure 21 so that the connection angle can be freely changed, and the recess 25 provided in the slide lock 5 is provided.
The position of one end of the coil spring 27 that urges the ball 26 to press the ball 26 against the slide lock 5 to restrict the operation of giving the directionality to the hinge structure 2 is adjusted to the hinge structure 2.
Bush 2 with internal thread for stopping screw 28 of 1
The point of the invention is to adopt a structure fixed to the outer peripheral surface of the device 9.

[0006]

In the conventional ratchet shown in FIG. 7, the angle of attachment of the handle 17 to the wrench body 10 can be changed, but the claws 34, the coil springs 33, and the spring stoppers 32 are arranged in a straight line. It is necessary to finally press the ball 35 into the center hole of the stopper 32 to prevent the stopper 32 from loosening, so that the length of the wrench body 10 in the longitudinal direction is inevitably increased, and There was a problem that it took time and effort.

As a means for pressing the pawl 6 of the slide lock 5 of the conventional ratchet shown in FIG. 8 into the ratchet teeth 2 of the socket 1 and engaging with the ratchet teeth 2 of the socket 1, a depression provided on the back surface of the slide lock 5. The position of one end of the coil spring 27 that urges the ball 26 to be fitted to the slide lock 5 against the slide lock 5 is determined by the hinge structure 2.
Bush 2 with internal thread for stopping screw 28 of 1
9, the hole 30 for inserting the ball 26 and the coil spring 27 is provided in the wrench main body 10.
Of the hinge mechanism 21 by screws 28, that is, the swing type, and a deep hole 30 is formed in a narrow hinge portion at the rear portion of the hinge body 10. The bush 2
Together with the formation of the holes for 9, the strength of the hinge portion is reduced.

In the conventional ratchet shown in FIG. 8, the cross section perpendicular to the moving direction of the slide lock 5 of (1) has at least the opposite side parallel to the rotation surface of the socket 1 in US Pat. No. 3,175,433. This is well known as seen in the figures of the pawls of US Pat. No. 4,974,475.

[0009]

The present invention is to solve the above-mentioned conventional problems all at once. As shown in FIG. 7, the side surface of the wrench body 10 is provided with a claw 34 and a coil spring 33.
The hole 31 for inserting the spring stopper 32 and the like, and the ball 2 on the rear surface of the hinge portion as shown in FIG.
6, the pawl 6 is provided with a ratchet tooth 2 on the outer periphery of the wrench socket 1 by completely novel means without providing a hole 30 for inserting the coil spring 27, a hole for the bush 29, or the like.
And engaged with each other with elasticity.

That is, first, as shown in FIGS. 1 to 4, a wrench socket 1 having ratchet teeth 2 on its outer periphery is rotatably provided in a socket support portion 4 of a wrench body 10 as shown in FIGS. The slide lock 5 having the claw 6 for restricting the rotation of the socket 1 is connected to the wrench socket 1.
In a ratchet wrench slidably provided in a slide hole 12 provided in the center side of the wrench body 10 so as to cross a part of the outer circumference of the wrench body, a slide lock 5 is provided between the slide lock 5 and the wrench body 10. A ratchet wrench characterized in that a compression coil spring 14 acting in a direction parallel to the sliding direction is provided, and the pawl 6 is resiliently urged against the ratchet teeth 2 for engagement.

A second aspect of the present invention is a wrench socket 1 having ratchet teeth 2 on the outer periphery as shown in FIGS.
Is rotatably supported in the socket support portion 4 of the wrench body 10, engages the ratchet teeth 2 on the outer periphery of the wrench socket by elastically urging the claws 6 provided on a part of the slide lock 5, and engages the handle 17. In a ratchet wrench in which the wrench socket 1 is irreversibly rotated in a fixed direction by reciprocating rocking, a sliding hole 12 for a slide lock 5 that passes through a part of the outer periphery of the wrench socket 1 is penetrated through the center of the wrench body 10. And a notch-shaped spring receiving shelf 13 is provided at the rear center of one side surface of the sliding hole 12.
A relief portion 7 is formed at the center of the front surface along the outer periphery of the wrench socket 1 and a claw 6 for engaging with the ratchet teeth 2 is provided at one end thereof. The slide lock 5 provided with the sliding hole 12 is provided between the spring receiving shelf 13 of the sliding hole 12 and the spring retainer 8 of the slide lock 5 via a compression coil spring 14.
A ratchet wrench characterized by being slidably provided in the inside.

[0012]

In the ratchet wrench of the present invention,
A compression coil spring 14 acting in a direction parallel to the sliding direction of the slide lock 5 having the pawl 6 is provided between the wrench body 10 and the slide lock 5, and the pawl 6 is attached to the ratchet teeth 2 on the outer circumference of the wrench socket 1. Since the claws 6 are pressed against each other from a fixed direction, the claws 6 are elastically biased by the ratchet teeth 2 to engage with each other, so that the slide lock 5 moves smoothly, thereby achieving a more reliable ratchet function.

That is, with the fitting teeth 3 on the inner circumference of the wrench socket 1 fitted in the head of the bolt, the handle 17 is shown in FIG.
When the wrench socket 1 is rotated as shown by the arrow F in FIG. 6, the pawl 6 and the ratchet teeth 2 mesh with each other, and the wrench socket 1 is rotated clockwise, and when the handle 17 is rotated as shown by the arrow G in FIG. The compression coil spring 14 is compressed as shown in FIG. 6 by the resistance force of the wrench socket 1 fitted in the portion, and the engagement between the pawl 6 and the ratchet teeth 2 is released, and only the handle 17 rotates.

The slide lock 5 according to the present invention.
The same mechanism is used not only for the wrench type in which the wrench body 10 and the handle 17 shown in the later-described embodiment have the hinge mechanism 21 but also for the fixed type in which the wrench body 10 and the handle 17 are integrated. it can.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The same members as those of the conventional product are denoted by the same reference numerals and described.

In FIG. 1, reference numeral 1 denotes a wrench socket having ratchet teeth 2 on the outer periphery and fitting teeth 3 fitted on bolts and nuts on the inner periphery. The wrench socket is rotatably fitted into a socket support portion 4 of a wrench body 10 and has a ring shape. It is supported so as not to come off by a stopper 11 in a shape of a circle.

Reference numeral 5 denotes a slide lock having a relief portion 7 at the center of the front surface along the outer periphery of the wrench socket 1 and having two claws 6 at its lower end for engaging with the ratchet teeth 2. The slide lock 5 is a wrench body. 10 is slidably provided in a penetrating sliding hole 12 provided at a central side portion of the wrench socket 1 so as to cross a part of the outer periphery of the wrench socket 1. The product is basically the same as the structure shown in FIG.

In the present invention, as shown in FIGS. 3 and 4, the horn-shaped sliding hole 1 provided in the center of the wrench body 10 is provided.
2, a semicircular notch-shaped spring receiving shelf 13 is provided at the rear center of one side, and the spring receiving shelf 13 is provided at the rear center of one end of the angular slide lock 5 which fits into the sliding hole 12 and slides. A spring holder 8 having a semicircular protruding shape that fits into the spring holder 8 is formed at the lower portion of the spring holder 8 to a position substantially the same as that of the spring holder 13, and the compression coil spring 1 is disposed between the spring holder 13 and the spring holder 8.
1, the pawl 6 of the slide lock 5 and the ratchet teeth 2 of the wrench socket 1 are assembled so as to mesh with each other as shown in FIG.

Incidentally, the slide lock 5 in the present embodiment.
1 and 2 is necessary when a compression coil spring 14 having a diameter such that a half thereof is mounted on a semicircular notch-shaped spring receiving shelf 13 as shown in FIGS. 1 and 2 is used. When a compression spring that fits in the spring receiving shelf 13 is used, the brush 9 is not required.

Reference numeral 17 denotes a handle having a forked portion 18 formed at the tip and a spring hole 19 at the center of the rear portion thereof. The flat portion 15 at the rear end of the wrench body 10 is inserted by interposing a compression coil spring 16 in the spring hole 19. The hinge mechanism 21 is fitted in the bifurcated portion 18 and allows the wrench body 10 and the handle 17 to swing and rotate with a pin 20.

FIG. 5 shows another embodiment of the slide lock according to the present invention, wherein the front surface of a round shaft-shaped slide lock 22 is formed into a flat surface 23 by slitting and a relief portion 7 is formed at the center thereof. A rectangular spring retainer 24 is provided at the rear center of one end in a protruding manner.

Therefore, when this slide lock 22 is used, although not shown, the shape of the slide hole 12 provided on the side of the wrench body 10 is a cylindrical shape having a flat surface on the front surface and one side surface. Spring receiving shelf 1 provided at the rear center
The shape of 3 may be cut into a rectangular shape. In this case, the flat surface 23 on the front and the rectangular spring retainer 2 on the rear are used.
4, rotation of the slide lock 22 can be prevented.

[0023]

According to the present invention, as a means for elastically pressing the pawl of the slide lock that meshes with the ratchet teeth, compression is performed between the spring retainer provided in the slide lock and the spring receiving rack provided in the slide hole. By adopting an extremely simple structure in which a coil spring is interposed, complicated processing and troublesome assembly work are unnecessary, and the size can be reduced. In addition, since the structure is simple, there are few failures and the function is smooth and reliable. Therefore, it can be said that the industrial applicability of the present invention is extremely high.

[Brief description of drawings]

FIG. 1 is a horizontal sectional view of an embodiment of a ratchet wrench according to the present invention.

FIG. 2 is a sectional view of ABCDE in FIG. 1;

FIG. 3 is a perspective view of a slide lock 5 shown in FIG.

FIG. 4 is a perspective view of the wrench body 10 shown in FIG.

FIG. 5 is a perspective view of another embodiment of the slide lock according to the present invention.

FIG. 6 is a horizontal sectional view at the time of ratchet operation in the present invention.

FIG. 7 is a horizontal sectional view of a conventional ratchet wrench.

FIG. 8 is a horizontal sectional view of another conventional ratchet wrench.

[Explanation of symbols]

1 Wrench socket 2 Ratchet teeth 3
Fitting tooth 4 Socket support part 5 Slide lock 6
Claw 8 Spring retainer 9 Slippery 10
Wrench body 11 Stopper 12 Sliding hole 1
3 Spring shelf 14 Compression coil spring

Claims (2)

[Claims] A slide lock having a rotatable wrench socket having ratchet teeth on an outer periphery thereof in a socket support portion of a wrench body, and a claw for restricting rotation of the wrench socket. A ratchet wrench slidably provided in a slide hole 12 provided in the center side of the wrench main body 10 so as to cross a part of the outer periphery of the wrench socket 1 between the slide lock 5 and the wrench main body 10. A ratchet wrench characterized in that a compression coil spring 14 acting in a direction parallel to a sliding direction of the slide lock 5 is provided, and the pawl 6 is resiliently urged against the ratchet teeth 2 for engagement. 2. A wrench socket 1 having ratchet teeth 2 on its outer circumference is rotatably supported in a socket support portion 4 of a wrench body 10, and ratchet teeth 2 on the outer circumference of the wrench socket.
In the ratchet wrench in which the claw 6 provided on a part of the slide lock 5 is elastically biased to engage with each other, and the wrench socket 1 is irreversibly rotated in a fixed direction by the reciprocal swing of the handle 17, A sliding hole 12 for the slide lock 5 is provided in the central side portion so as to traverse a part of the outer circumference of the wrench socket 1 in a penetrating manner. On the other hand, a relief portion 7 is formed along the outer circumference of the wrench socket 1 at the center of the front surface, and a pawl 6 that meshes with the ratchet teeth 2 is provided at one end thereof, and a notch of the spring receiving rack 13 is provided at the center of the rear portion of the other end. The slide lock 5 provided with the spring retainer 8 that fits in the slide slides in the slide hole 12 through the compression coil spring 14 between the spring receiving rack 13 of the slide hole 12 and the spring retainer 8 of the slide lock 5. A ratchet wrench characterized by being provided as possible.