CN212601536U

CN212601536U - Adjustable spanner

Info

Publication number: CN212601536U
Application number: CN202021284845.5U
Authority: CN
Inventors: 凡思军; 凡思义; 叶勇
Original assignee: Hangzhou Lianfa Pipe Industry Technology Co ltd
Current assignee: Hangzhou Lianfa Pipe Industry Technology Co ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-02-26
Anticipated expiration: 2030-07-03

Abstract

The utility model discloses an adjustable wrench, which comprises a handle, a fixed jaw and a movable jaw, wherein a wrench jaw consists of the head of the fixed jaw and the head of the movable jaw, and the fixed jaw is fixedly connected with the handle; the connecting piece is rotationally connected with the fixed claw, worm teeth rotationally connected with the connecting piece are arranged on the connecting piece, and a rack meshed with the worm teeth is arranged on the movable claw; be equipped with the spring passageway that is linked together with the surface of connecting piece in the inner chamber of connecting piece, set up the self-adaptation spring in the spring passageway, the bottom butt of the bottom of self-adaptation spring and spring passageway, the top of self-adaptation spring wear out behind the spring passageway with the stationary dog butt. The adjustable wrench is convenient to use and can avoid slipping, so that curved objects can be effectively clamped.

Description

Adjustable spanner

Technical Field

The utility model relates to a spanner, especially an adjustable spanner that can avoid skidding.

Background

The wrench is a common mounting and dismounting tool and comprises a handle, a fixed claw and a movable claw; the wrench jaw consists of a head of a fixed jaw and a head of a movable jaw; the fixed claw is provided with a through hole, worm teeth which can rotate relative to the fixed claw are arranged in the through hole, a channel is arranged on the side wall of the fixed claw, a rack which is matched with the worm teeth is arranged on the movable claw, and the rack is meshed with the worm teeth after passing through the channel; the movable claw is driven to move relative to the fixed claw by the rotation of the worm gear, so that the opening degree of the jaw of the wrench can be adjusted.

In practical use, when the wrench jaw is clamped on a curved object (such as various light pipes like a galvanized pipe), the jaw slips in the process of screwing with force, and the reason is analyzed to be that the plane friction force is small, or the wrench jaw is not adjusted to the best position and does not clamp the object.

Therefore, there is a need for an improved wrench that can effectively grip curved objects without slipping.

SUMMERY OF THE UTILITY MODEL

The to-be-solved problem of the utility model is to provide a convenient to use, avoid the adjustable spanner of skidding to effectively press from both sides tight curved surface thing.

In order to solve the technical problem, the utility model provides an adjustable wrench, which comprises a handle, a fixed jaw and a movable jaw, wherein a wrench jaw consists of the head of the fixed jaw and the head of the movable jaw, and the fixed jaw is fixedly connected with the handle;

the connecting piece is rotationally connected with the fixed claw, worm teeth rotationally connected with the connecting piece are arranged on the connecting piece, and a rack meshed with the worm teeth is arranged on the movable claw;

be equipped with the spring passageway that is linked together with the surface of connecting piece in the inner chamber of connecting piece, set up the self-adaptation spring in the spring passageway, the bottom butt of the bottom of self-adaptation spring and spring passageway, the top of self-adaptation spring wear out behind the spring passageway with the stationary dog butt.

As the utility model discloses an improvement of adjustable spanner: the connecting piece is provided with a through hole, worm teeth which are rotationally connected with the connecting piece are arranged in the through hole, a channel is arranged on the inner side wall (the side wall close to the movable claw) of the connecting piece, and the rack penetrates through the channel and then is meshed with the worm teeth.

As a further improvement of the adjustable wrench of the present invention: a rotating interval limiting device is arranged between the connecting piece and the fixed claw; the rotating interval limiting device comprises a limiting convex block positioned on the handle.

As a further improvement of the adjustable wrench of the present invention: the connecting piece is connected with the fixed claw in a rotating way through a shaft pin.

The utility model discloses an adjustable spanner has following technical advantage: because of the rotatability of the connecting piece, the movable claw can automatically rotate by a certain angle in the process of screwing and stressing, thereby changing the angle of the jaw and avoiding the phenomenon of skidding. The utility model is particularly suitable for pipeline construction, and greatly improves the installation efficiency; has good economic benefit and social benefit. The utility model discloses simple structure, convenient to operate and use.

Drawings

The following describes the present invention in further detail with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of the adjustable wrench according to the present invention after partially cutting.

Detailed Description

The invention will be further described with reference to specific examples, but the scope of protection of the invention is not limited thereto:

embodiment 1, an adjustable wrench, as shown in fig. 1, includes a handle 1, a fixed jaw 2, a movable jaw 3, a connecting member 4; the fixed claw 2 is fixedly connected with the handle 1.

The wrench jaw 10 is composed of a head of the fixed jaw 2 and a head of the movable jaw 3, and the opening (opening) of the wrench jaw 10 is generally about 40mm, which is a conventional technique.

A through hole 40 penetrating through the thickness direction of the connecting piece 4 is formed in the connecting piece 4, a worm gear 51 connected with the connecting piece 4 in a rotating mode is arranged in the through hole 40, a channel 42 is formed in the inner side wall 41 (namely, the side wall close to the movable claw 3) of the connecting piece 4, a rack 52 matched with the worm gear 51 is arranged on the movable claw 3, and the rack 52 penetrates through the channel 42 and then is meshed with the worm gear 51; the movable claw 3 is driven to move relative to the fixed claw 2 by the rotation of the worm gear 51, so that the opening degree of the wrench jaw 10 is adjusted.

The connecting piece 4 is rotatably connected with the fixed claw 2 through a shaft pin 6.

Be equipped with the spring passageway 43 that is linked together with the surface of connecting piece 4 in the inner chamber of connecting piece 4, set up self-adaptation spring 8 in spring passageway 43, the bottom butt of self-adaptation spring 8 and spring passageway 43, the top of self-adaptation spring 8 is worn out spring passageway 43 and is followed with stationary dog 2 butt.

A rotation interval limiting device is arranged between the connecting piece 4 and the fixed claw 2 and comprises a limiting lug 7. As shown in fig. 1, in the normal state, the inner side wall 41 of the connecting member 4 abuts against the side wall 21 of the fixing claw 2, so that the connecting member 4 can rotate only counterclockwise. A limiting lug 7 is arranged on the handle 1; when the connecting member 4 is rotated counterclockwise to abut against the position restricting projection 7, the connecting member 4 cannot be further rotated counterclockwise.

The purpose of setting the rotation interval limiting device is to ensure that the adaptive spring 8 is within the spring stroke, and avoid the situation that the adaptive spring 8 cannot return to the original position due to excessive deformation. Thereby ensuring safety of use.

This use neotype adjustable spanner, during the in-service use:

placing an object into the wrench jaw 10, rotating the worm 51, and moving the rack 52 along the worm 51; thereby driving the movable jaw 3 to approach the fixed jaw 2, i.e. the opening of the wrench jaw 10 is gradually reduced. Until the head of the fixed jaw 2 and the head of the movable jaw 3 both contact the object. At this time, the inner side wall 41 of the connecting member 4 abuts against the side wall 21 of the fixed claw 2, and the adaptive spring 8 is not deformed.

Then, the screwing is continuously realized by rotating the worm gear 51, in the screwing process, as the connecting piece 4 can rotate relative to the fixed claw 2 through the shaft pin 6, the movable claw 3 can rotate anticlockwise by a certain angle when stressed, and simultaneously the connecting piece 4 is driven to rotate anticlockwise, the adaptive spring 8 is correspondingly deformed, and the angle of the wrench jaw 10 is correspondingly changed; under the action of the return elasticity of the self-adaptive spring 8, the head of the movable claw 3 can be well attached to an object to be clamped, so that the slipping phenomenon is avoided; the whole screwing step is ended until the worm gear 51 cannot be rotated, and the head of the fixed jaw 2 and the head of the movable jaw 3 are tightly clamped on the object.

When the wrench is unscrewed, under the action of the return elastic force of the self-adaptive spring 8, the connecting piece 4 drives the movable claw 3 to rotate and reset clockwise together, so that the inner side wall 41 of the connecting piece 4 is abutted to the side wall 21 of the fixed claw 2.

Finally, it is also noted that the above-mentioned list is only a few specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.

Claims

1. The adjustable wrench comprises a handle (1), a fixed jaw (2) and a movable jaw (3), a wrench jaw (10) consists of the head of the fixed jaw (2) and the head of the movable jaw (3), and the fixed jaw (2) is fixedly connected with the handle (1); the method is characterized in that:

the connecting piece (4) is rotationally connected with the fixed claw (2), worm teeth (51) rotationally connected with the connecting piece (4) are arranged on the connecting piece (4), and a rack (52) meshed with the worm teeth (51) is arranged on the movable claw (3);

be equipped with spring channel (43) that are linked together with the surface of connecting piece (4) in the inner chamber of connecting piece (4), set up self-adaptation spring (8) in spring channel (43), the bottom of self-adaptation spring (8) and the bottom butt of spring channel (43), the top of self-adaptation spring (8) wear out behind spring channel (43) and stationary dog (2) butt.

2. The adjustable wrench of claim 1, wherein:

the connecting piece (4) is provided with a through hole (40), the through hole (40) is internally provided with a worm gear (51) which is rotationally connected with the connecting piece (4), the inner side wall (41) of the connecting piece (4) is provided with a channel (42), and the rack (52) penetrates through the channel (42) and then is meshed with the worm gear (51).

3. An adjustable spanner as claimed in claim 1 or 2 wherein: a rotating interval limiting device is arranged between the connecting piece (4) and the fixed claw (2); the rotating interval limiting device comprises a limiting bump (7) positioned on the handle (1).

4. The adjustable wrench of claim 3, wherein: the connecting piece (4) is rotationally connected with the fixed claw (2) through a shaft pin (6).