CN107932388A - A kind of rolling pin style ratchet spanner - Google Patents

Abstract

The invention provides a needle roller ratchet wrench, which includes a handle body, a circular handle body hole is arranged at one end of the handle body, a wheel body is provided on the ratchet wrench, and the wheel body is located in the handle body hole, The centers of the upper and lower sides of the wheel body are respectively provided with wrench bodies of the same model; the edge of the wheel body is provided with an L-shaped notch, and the L-shaped notch and the hole wall of the handle body form a needle roller with a gradually decreasing width. The movable hole is provided with a needle roller in the movable hole of the needle roller, and the spring hole is arranged at the bottom of the L-shaped notch of the wheel body, and the spring and the ejector pin supported by the spring and matched with the needle roller are arranged in the spring hole. When the needle is at the bottom of the L-shaped notch, there is a gap between the needle roller and the walls on both sides of the movable needle hole. The hole wall is clamped tightly. The invention has simple structure, few parts, the needle roller moves in the L-shaped notch of the wheel body, and the overall volume of the ratchet wrench is small, which is suitable for more working occasions.

Description

A needle roller ratchet wrench

technical field

The invention relates to a ratchet wrench.

Background technique

The commonly used ratchet wrench adopts a pawl switch to switch the direction. The pawl switch of the wrench with this structure needs to have a movement space, so the volume of the ratchet wrench is relatively large.

Contents of the invention

The technical problem to be solved by the present invention is to provide a needle roller ratchet wrench with small volume. For this reason, the present invention adopts following technical scheme:

A needle roller ratchet wrench, comprising a handle body, characterized in that one end of the handle body is provided with a circular handle body hole, the ratchet wrench is provided with a wheel body, and the wheel body is located in the handle body hole, so The centers of the upper and lower sides of the wheel body are respectively provided with wrench bodies of the same model; the edge of the wheel body is provided with an L-shaped notch, and the L-shaped notch and the hole wall of the handle body form a needle-rolling activity whose width gradually decreases. The needle roller is provided in the active hole of the needle roller. The wheel body is provided with a spring hole at the bottom of the L-shaped notch. The spring and the ejector pin supported by the spring and matched with the needle roller are arranged in the spring hole. When at the bottom of the L-shaped notch, there is a gap between the needle roller and the walls on both sides of the movable needle hole. After the needle roller leaves the bottom of the L-shaped notch, the needle roller is moved by the holes on both sides of the movable needle hole. The wall is stuck tight.

Further, the wheel body is evenly provided with a plurality of L-shaped notches in the same direction along the circumferential direction, and each L-shaped notch and the hole wall of the handle body form a needle roller movable hole whose width gradually decreases.

Further, the bottom of the handle body hole is provided with a limit step of the wheel body, the top of the handle body hole is provided with a ring groove, and the top of the wheel body is positioned by the ring ring and the gasket below the ring ring .

Further, the ejector pin is a dummy pin.

Due to the adoption of the technical solution of the present invention, the needle roller ratchet wrench of the present invention has a simple structure and few parts, and the needle roller moves in the L-shaped gap of the wheel body. The ratchet wrench has a small overall volume and is suitable for more working occasions.

Description of drawings

Fig. 1 is a schematic diagram of the embodiment provided by the present invention during the retraction operation, showing the structure of the internal cavity of the handle.

Fig. 2 is a cross-sectional view of the embodiment provided by the present invention.

Fig. 3 is a schematic diagram of the embodiment provided by the present invention in forward working operation, showing the structure of the internal cavity of the handle.

Fig. 4 is an exploded view of the embodiment provided by the present invention.

Detailed ways

Refer to attached picture. The needle roller ratchet wrench provided by the present invention includes a handle body 1, one end of the handle body 1 is provided with a circular handle body hole 10, and the ratchet wrench is provided with a wheel body 2, and the wheel body 2 is located at the handle In the body hole 10, the center of the upper side and the lower side of the wheel body 2 are respectively provided with wrench bodies 21 and 22 of the same type; The handle body hole wall 11 forms a needle roller movable hole whose width gradually decreases, and a needle roller 3 is arranged in the needle roller movable hole. The wheel body 2 is provided with a spring hole 24 at the bottom of the L-shaped notch, and a spring 41 and the ejector pin 42 supported by the spring 41 and matched with the needle roller 3, when the needle roller 3 is at the bottom of the L-shaped notch 23, there is a gap between the needle roller 3 and the two side walls of the needle roller movable hole, After the needle roller 3 leaves the bottom of the L-shaped notch 23, the needle roller 3 is clamped by the two side walls of the needle roller movable hole.

The wheel body 2 is evenly provided with a plurality of L-shaped notches in the same direction along the circumferential direction, and each L-shaped notch and the handle body hole wall 11 form a needle roller activity hole whose width gradually decreases, and corresponding needle rollers and springs are arranged. Holes, springs and ejector pins. In this way, compared with the conventional ratchet wrench with a pawl switch, the present invention can input larger torque and has more reliable performance.

The ejector pin 42 is a hollow pin and covers the top of the spring 41 inside.

The bottom of the handle body hole 10 is provided with a limit step 12 of the wheel body 2, and the top of the handle body hole 10 is provided with a snap ring groove 13. Spacer 6 is positioned.

When the ratchet wrench of the present invention is working, when the handle body 1 rotates counterclockwise, the empty pin pops up against the needle roller 3, and the rotation space of the needle roller 3 becomes smaller and smaller until the needle roller 3 is covered by the L-shaped notch 23 and the hole wall 11 of the handle body. It is completely stuck to generate torque, the handle body 1 rotates in the opposite direction and brings the needle roller 3 to rotate the empty pin to retreat, and the ball is in a disengaged state. Repeat until the fastener is tightened. The one-way ratchet cooperates with the front and back wrench bodies 21, 22 to realize two-way operations.

The above descriptions are only specific embodiments of the present invention, but the structural features of the present invention are not limited thereto, any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the protection scope of the present invention among.

Claims (4)

1. a kind of rolling pin style ratchet spanner, including shank body, it is characterised in that one end of the shank body is provided with circular shank body hole, institute State ratchet spanner and be provided with wheel body, the wheel body is in shank body hole, and the center of the upper side and lower side of the wheel body is set respectively The identical wrench body of model；The edge of the wheel body sets L-type notch, and the L-type notch and shank body hole wall composition width are gradual The needle roller movable span of reduction, sets needle roller in needle roller movable span, and the wheel body sets spring eye in the bottom of L-type notch, Spring is set in spring eye and from the spring-supported ejector pin with needle roller, the bottom of L-shaped notch is in the needle roller When, there is gap between the both sides hole wall of needle roller and needle roller movable span, after the needle roller leaves L-shaped indentations bottom, the needle roller By the both sides hole wall institute clamping of needle roller movable span.

2. a kind of rolling pin style ratchet spanner as claimed in claim 1, it is characterised in that the wheel body is along the circumferential direction uniformly set Put multiple L-type notches in the same direction, the needle roller movable span that each L-type notch is gradually reduced with shank body hole wall composition width.

3. a kind of rolling pin style ratchet spanner as claimed in claim 1, it is characterised in that the bottom in the shank body hole sets wheel body Limited step, the top in the shank body hole sets jump-ring slot, and the top of the wheel body by clamp spring and is in below clamp spring Gasket is positioned.

4. a kind of rolling pin style ratchet spanner as claimed in claim 1, it is characterised in that the ejector pin is sold to be empty.