CN105983934B

CN105983934B - Adjustable spanner

Info

Publication number: CN105983934B
Application number: CN201510042034.1A
Authority: CN
Inventors: 王暋
Original assignee: Hangzhou Great Star Industrial Co Ltd
Current assignee: Hangzhou Great Star Industrial Co Ltd
Priority date: 2015-01-28
Filing date: 2015-01-28
Publication date: 2024-02-23
Anticipated expiration: 2035-01-28
Also published as: CN105983934A

Abstract

The invention discloses an adjustable spanner which comprises a handle and a working part, wherein the working part comprises an adjusting device and at least two clamping jaws, the clamping jaws are distributed along the circumferential direction of the working part, the adjusting device is used for adjusting the clamping jaws to move in the radial direction of the working part at the same time and to be close to or far from the center of the working part, namely, a bayonet formed by a plurality of clamping jaws is adjustable. The adjustable spanner provided by the invention is suitable for workpieces with different specifications, and can realize rapid adjustment.

Description

Adjustable spanner

Technical Field

The invention relates to a manual tool, in particular to an adjustable spanner.

Background

The hand tool such as a general spanner comprises a handle and a claw fixed on the handle, wherein the claw can extend along the direction of the handle or extend along the direction vertical to the handle, and a plurality of claws form a bayonet capable of being matched with a workpiece. In practical use, people usually need to face workpieces of different specifications and models, and only wrenches of corresponding models can be matched with the workpieces stably and effectively. If the bayonet of the wrench is not matched with the workpiece, the wrench cannot be used or is easy to loosen in the use process, so that a wrench of a corresponding model is usually required to be selected according to the specific size of the workpiece. Because of the variety and type of workpieces, it is often inconvenient to prepare a wide variety of different types of hand tools.

US7997168B2 discloses an adjustable ratchet wrench for tightening or loosening bolts and nuts. Comprising a pair of movable jaws and an adjusting device. The adjustable ratchet wrench mainly utilizes the thumb wheel to drive the gear shaft to rotate, so that movable claws move along the gear shaft in opposite directions or in opposite directions, and the size of a bayonet formed by the claws is adjusted to adapt to bolts or nuts of different types. While this adjustable ratchet wrench performs the function of adjusting the jaws, its utility is very low. Firstly, the operation of the thumb wheel is inconvenient, secondly, the stability of the transmission mechanism is poor, and thirdly, a pair of clamping jaws which are regulated by a gear shaft are unstable in use.

Accordingly, those skilled in the art have focused their efforts on developing an adjustable wrench that is easy to operate, has high stability, and can adjust the size of the bayonet.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention aims to provide an adjustable wrench with convenient operation and high stability, which can adjust the distance between the bayonet of the wrench and tightly fix the claw and the workpiece.

To achieve the above object, the present invention provides an adjustable wrench comprising a handle and a working portion, the handle having a first end and a second end opposite thereto, the second end having a head for receiving the working portion, the working portion comprising at least two jaws distributed along a circumference of the working portion and extending in an axial direction of the working portion, the adjustable wrench further comprising an adjustment device arranged for adjusting the jaws such that the jaws move simultaneously in a radial direction of the working portion, towards or away from a center of the working portion.

In a further embodiment, the working part further comprises a base, the jaws being slidably arranged on the base, the jaws having clamping surfaces; the handle drives the base to rotate, and the base drives the clamping jaw to rotate along the axis of the base, and the clamping jaw outputs torque through the clamping surface.

In a further embodiment, the base has a slot portion thereon, wherein the slot portion is configured to mate with the pawl such that the pawl is movable along the slot portion.

In a further embodiment, the adjusting device comprises a knob and a connecting piece, the knob is coaxial with the base, the direction of the connecting piece is perpendicular to the axis of the knob, the knob and the connecting piece are provided with a matched conical tooth surface, and the knob drives the connecting piece to rotate through the conical tooth surface; the connecting piece passes through the clamping jaw, wherein the external thread of the connecting piece is matched with the internal thread of the clamping jaw, so that the clamping jaw is driven to move along the groove part when the connecting piece rotates.

In other embodiments, the adjusting device comprises a knob and a connecting piece, the knob is coaxial with the base, the axis of the connecting piece is perpendicular to the axis of the knob, the knob and the connecting piece are provided with a conical tooth surface capable of being matched, the claw is provided with a rod part, the rod part is provided with external threads matched with the connecting piece, and the claw is driven to move along the groove part when the connecting piece rotates.

In other embodiments, the adjusting device is a knob, the lower end surface of the knob is provided with a planar thread structure, the upper end surface of the claw is provided with an arc tooth surface, and the planar thread structure is matched with the arc tooth surface so that the claw is driven to move along the groove part when the knob rotates.

In a further embodiment, the working portion further comprises a reversing device, the reversing device comprises a pawl element, the pawl element is matched with teeth of a ratchet surface on the base, so that the pawl element can selectively drive the base to rotate in a first direction or a second direction, slipping occurs in the other direction, the first direction is clockwise or anticlockwise, and the second direction is opposite to the first direction; the reversing switch is used for switching the direction in which the pawl element drives the base to rotate; the handle has a first space in which the reversing device can be accommodated.

In a further embodiment, the reversing switch comprises a spring and a limiting member, the handle has a second space which can accommodate the spring, the second space communicates with the first space on the side facing the working portion, the limiting member cooperates with the pawl element, and the spring applies a pre-tightening force to the pawl element through the limiting member.

In a further embodiment, the spring is disposed within the spacing member.

In a further embodiment, the reversing switch further comprises a paddle, the paddle being connected to the pawl element.

In a further embodiment, the base comprises a first rotating part and a second rotating part, the first rotating part and the second rotating part being connected by means of a bolt, the first rotating part having ratchet surfaces cooperating with the ratchet element, the groove being located on the second rotating part.

In a further embodiment, the working part has no less than two jaws.

In a further embodiment, the working part has three jaws.

In a further embodiment, the jaws are I-shaped and nest in the slots of the base.

In a further embodiment, the clamping surfaces can optionally be provided as inner and outer sides of the jaws.

In a further embodiment, the clamping surface is a V-shaped surface.

In a further embodiment, the clamping surface is a profiled surface.

In a further embodiment, the base and the knob have through holes in the direction of their central axes.

In a further embodiment, the inner side lower edge of the handle restrains the pawl in the slot.

In a further embodiment, the jaws are evenly distributed along the circumference of the working part.

In a further embodiment, jaws are used to clamp a workpiece, such as a bolt, nut, or other fastener.

The adjustable spanner provided by the invention has the advantages that the bayonet distance between the clamping jaws is adjustable, the clamping jaws are tightly connected with a workpiece, the operation is convenient, the adjustment is quick, the stability is high, the self-locking function is realized, and the clamping jaws can be effectively prevented from loosening when the spanner drives the workpiece to rotate after the clamping jaws clamp the workpiece.

The conception, specific structure, and technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present invention.

Drawings

Fig. 1 is a front view of an adjustable spanner according to embodiment 1 of the present invention.

Fig. 2 shows the working part of the adjustable spanner according to embodiment 1 of the present invention.

Fig. 3 shows the adjusting device and the claw according to embodiment 1 of the present invention.

Fig. 4 shows another arrangement of the adjusting device and the claw according to embodiment 1 of the invention.

Fig. 5 is a sectional view of A-A of the second rotating member of embodiment 1 of the present invention.

Fig. 6 shows a reversing device in an adjustable spanner according to embodiment 1 of the present invention.

Fig. 7 is a sectional view of the reversing device of the adjustable spanner according to embodiment 1 of the present invention.

Fig. 8 shows the jaw and its clamping surface of embodiment 1 of the invention.

Fig. 9 shows the working part of the adjustable spanner according to embodiment 2 of the present invention.

Fig. 10 is a bottom view of the knob of fig. 9.

Fig. 11 is a perspective view of the pawl of fig. 9.

Detailed Description

Example 1

As shown in fig. 1, the adjustable wrench of the present invention includes a handle 10 and a working portion 20, the handle 10 having a first end 12 and an opposite second end 13. The second end 13 has a head 11 (see fig. 2) thereon and is connected to the working portion 20. The working portion 20 is provided with a claw 23, and the claw 23 can be configured to be suitable for operating various workpieces by being arranged in different shapes. The adjustable spanner of the present invention may have two or more jaws. The present embodiment preferably has 3 claws and is distributed along the circumferential direction of the working portion 20.

The working part 20 of the adjustable spanner of this embodiment is structured as shown in fig. 2 and 3, and comprises a base 22, a claw 23, a reversing device 24 and an adjusting device 21. The head 11 of the handle 10 is connected to the base 22, and the base 22 is selectively driven by the reversing device 24 to rotate around the axis of the base 22 in a first direction or a second direction, and slipping occurs in the other direction, wherein the first direction is clockwise or anticlockwise, and the second direction is opposite to the first direction. The base 22 is provided with a slot 224, and the slot 224 cooperates with the pawl 23 such that the pawl 23 can slide along the slot 224, for example, the pawl 23 can be configured to be I-shaped to nest in the base 22. The adjusting device 21 is used to adjust the position of the claw 23 on the groove 224. Specifically, the adjusting device 21 of the present embodiment includes a knob 211 and a connector 212. The connector 212 includes a proximal end 2121 having a tapered surface 2123 and a distal end 2122 having external threads. The connector 212 passes through the jaw 23 and is threadably coupled to the jaw 23 by a distal end 2122. The lower end surface 2113 of the knob 211 is in a tooth-shaped structure, and the tapered surface 2123 of the proximal end 2121 of the connecting member 212 is engaged with the lower end surface 2113 of the knob 211, so that the connecting member 212 drives the claw 23 to move along the groove 224 when the knob 211 is rotated. The knob 211 can be kept coaxial with the base 22 by the positioning pin 225, so that the stability of the knob 211 when the jaw 23 is adjusted to move is improved. In other embodiments (see fig. 4), the pawl 23 may be provided with a shank 234, the shank 234 having external threads thereon. The stem 234 of the pawl 23 passes through the connector 212 and is threadably connected to the connector 212. The proximal end 2121 of the coupler 212 has a tapered surface 2123 that engages a toothed structure on the lower end surface 2113 of the knob 211 so that when the knob 211 is rotated, the coupler 212 drives the pawl 23 along the slot 224.

For convenience of use, in this embodiment, two ridges protruding from the surface of the knob 211 are provided on the knob 211, and the knob 211 may be turned by applying a rotational moment to the two ridges during use. In other embodiments, the outer peripheral surface of the knob 211 may be provided as a surface suitable for gripping, i.e., the knob 211 may be turned by gripping the outer peripheral surface of the knob 211.

The base 22 of the present embodiment includes a first rotating member 221 and a second rotating member 222, wherein a groove 224 of the base 22 is located on the second rotating member 222, and the first rotating member 221 and the second rotating member 222 are fixedly connected by a bolt. The outer peripheral surface of the first rotating member 221 includes a ratchet surface. As shown in fig. 5, which is A-A cross-sectional view of the second rotational member 222, the slots 224 are centrally and symmetrically disposed on the second rotational member 222 with a proximal end 2241 having a greater width than the other end for receiving the proximal end 2121 of the coupler 212. In other embodiments, the base 22 may be a single piece, i.e., the portion of the outer peripheral surface of the base 22 is a ratchet surface.

The reversing device 24 of the present embodiment includes a reversing switch 242 composed of a paddle 2422 and a limiting member 2421, and a pawl element 241, as shown in fig. 6. Wherein the pawl element 241 and the stop member 2421 are positioned in the first space 113 and the second space 114, respectively, within the handle 10 (see fig. 7). The paddle 2422 is provided with a rotation shaft 2423 which passes through the handle 10 and is connected with the pawl element 241. The dial 2422 and the pawl element 241 can rotate synchronously about the rotational axis 2423.

The applicant discloses in international patent application (PCT/CN 2013/070641) the structure and working principle of the pawl element 241. Namely, the pawl element 241 in the present embodiment constitutes a ratchet part with the first rotating part 221 and the reversing switch 242, realizes a ratchet function of the adjustable wrench, and switches the rotating direction by the reversing switch 242. Other pawl element configurations are also contemplated for reference to the pawl element of U.S. patent No. 6789447B1, US7587961B1 or british patent application GB2041272 a.

As shown in fig. 8, the claw 23 of the present embodiment is i-shaped for engagement with the groove 224 on the base 22. The jaw 23 further includes a clamping surface 231, optionally configured as an inner or outer side depending on the fastener configuration. The clamping surface 231 of the jaw 23 as in the present embodiment is an inner side surface for cooperation with an external corner fastener. As previously mentioned, the jaws 23 are movable over the slot 224 of the base 22, and the clamping surfaces 231 of the jaws 23 form a bayonet for clamping a fastener, the distance of the clamping surfaces 231 from the centre of the bayonet being the radius of the bayonet. The clamping surface 231 may be provided with a particular configuration, such as a V-shaped surface as shown in fig. 7, for cooperation with the edge of a workpiece.

Example 2

In the adjustable spanner according to embodiment 1, in the present embodiment, the working portion 20 of the adjustable spanner is structured as shown in fig. 9, and includes a base 22, a claw 23, a reversing device 24, and a knob 211. The base 22 includes a first rotating member 221 and a second rotating member 222, where the first rotating member 221 and the second rotating member 222 have an outer tooth surface and an inner tooth surface that can cooperate with each other, respectively, so that the first rotating member 221 can drive the second rotating member 222 to rotate about its axis. The head 11 of the handle 10 is connected to the base 22, and the base 22 is selectively driven by the reversing device 24 to rotate around the axis of the base 22 in a first direction or a second direction, and slipping occurs in the other direction, wherein the first direction is clockwise or anticlockwise, and the second direction is opposite to the first direction. The second rotating member 222 is provided with a groove 224, and the groove 224 cooperates with the claw 23 such that the claw 23 can slide along the groove 224. The present embodiment preferably has three pairs of claws 23 and is distributed in the circumferential direction of the working portion 20.

Fig. 10-11 show a bottom view of the knob 211 and perspective views of the pawl 23 of the present embodiment. As can be seen in fig. 10, the lower end surface 2113 of the knob 211 has a stem portion 2111 at the center thereof, extending toward the first rotational member 221 and through the first rotational member 221 and the second rotational member 222, so that the knob 211 is kept coaxial with the first rotational member 221 and the second rotational member 222. The lower end surface 2113 of the knob 211 has a planar thread structure 2112, which projects as a planar spiral on the lower end surface 2113 of the knob 211, the spiral may be one, two or more groups, and in this embodiment is preferably one group. The upper end surface 235 of the claw 23 contacts with the lower end surface 2113 of the knob 211, and the upper end surface 235 of the claw 23 has an arc tooth-shaped structure 232 as shown in fig. 11, and cooperates with the planar thread structure 2112 of the lower end surface of the knob 211 so that the knob 211 can slide with the claw 23 when rotating around the shaft. Specifically, when the knob 211 is rotated in the first direction or the second direction, the claw 23 will be close to or far from the center of the knob 211. For convenience of use, in this embodiment, two ridges protruding from the surface of the knob 211 are provided on the knob 211, and the knob 211 may be turned by applying a rotational moment to the two ridges during use.

The reversing device 24 of the present embodiment is identical to that of embodiment 1 in structure, and includes a reversing switch 242 composed of a paddle 2422 and a limiting member 2421, and a pawl element 241, as shown in fig. 6. The pawl element 241 forms a ratchet part with the first rotating part 221 and the reversing switch 242, realizes the ratchet function of the adjustable spanner, and switches the rotating direction through the reversing switch 242.

The clamping surface 231 of the jaws 23 of the present embodiment may optionally be provided as an inner or outer surface depending on the fastener configuration. As shown in fig. 11, the clamping surface 231 of the claw 23 of the present embodiment is provided as an inner surface, and the clamping surface 231 is a plane.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention without requiring creative effort by one of ordinary skill in the art. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. An adjustable wrench comprising a handle and a working portion, the handle having a first end and a second end opposite thereto, the second end having a head for receiving the working portion, the working portion comprising at least two jaws evenly distributed along a circumference of the working portion and extending in an axial direction of the working portion, characterized in that the adjustable wrench further comprises an adjustment device arranged for adjusting the jaws such that the jaws move simultaneously in a radial direction of the working portion, towards or away from a center of the working portion; the working part further comprises a base, the clamping jaw is slidably arranged on the base, and the clamping jaw is provided with a clamping surface; the handle drives the base to rotate, the base drives the clamping jaw to rotate along the axis of the base, and the clamping jaw outputs torque through the clamping surface; the base is provided with a groove part, and the groove part is arranged to be matched with the clamping jaw, so that the clamping jaw can move along the groove part; the adjusting device comprises a knob and a connecting piece, the knob is coaxial with the base, the direction of the connecting piece is perpendicular to the axis of the knob, the knob and the connecting piece are provided with conical tooth surfaces which can be matched, and the knob drives the connecting piece to rotate through the conical tooth surfaces; the connecting piece passes through the clamping jaw, wherein the external thread of the connecting piece is matched with the internal thread of the clamping jaw, so that the clamping jaw is driven to move along the groove part when the connecting piece rotates; each of the jaws corresponds to one of the connectors.

2. The adjustable spanner of claim 1 wherein said working portion further comprises a reversing device comprising

The pawl element is matched with teeth of a ratchet surface on the base, so that the pawl element can selectively drive the base to rotate in a first direction or a second direction, slipping occurs in the other direction, the first direction is clockwise or anticlockwise, and the second direction is opposite to the first direction;

the reversing switch is used for switching the direction in which the pawl element drives the base to rotate;

the handle has a first space in which the reversing device can be accommodated.

3. The adjustable spanner of claim 2 wherein the reversing switch includes a spring and a limiting member, the handle having a second space that accommodates the spring, the second space being in communication with the first space on a side facing the working portion, the limiting member being engaged with the pawl element, the spring exerting a preload force on the pawl element by the limiting member.

4. An adjustable spanner as claimed in claim 3 wherein said spring is disposed within said stop member.

5. The adjustable spanner of claim 4 wherein said reversing switch further comprises a paddle, said paddle being coupled to said pawl element.

6. The adjustable spanner of claim 2 wherein said base comprises a first rotational member and a second rotational member, said first rotational member being bolted to said second rotational member, said first rotational member having ratchet surfaces for engagement with said ratchet element, said groove being located on said second rotational member.

7. The adjustable spanner of claim 1 wherein said working portion has three jaws.

8. The adjustable spanner of claim 1 wherein said jaws are i-shaped and nest in said slots of said base.

9. The adjustable spanner of claim 1 wherein said clamping surfaces are selectively configured as an inner side and an outer side of said jaws.

10. The adjustable spanner of claim 9 wherein the clamping surface is a contoured or V-shaped surface.

11. The adjustable spanner of claim 1 wherein said base and said knob have through holes in the direction of their central axes.

12. The adjustable spanner of claim 1 wherein an inner lower edge of said handle restrains said jaws in said groove.

13. The adjustable spanner of claim 9 wherein said jaws are adapted to clamp a workpiece.