CN112975804A

CN112975804A - Torque wrench

Info

Publication number: CN112975804A
Application number: CN201911308660.5A
Authority: CN
Inventors: 黄桂宏; 全伟
Original assignee: Tianze Power Jiangsu Co ltd
Current assignee: Tianze Power Jiangsu Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2021-06-18

Abstract

An embodiment of the present invention provides a torque wrench, including: a wrench body including a handle and a mounting portion formed at a front end of the handle; the ratchet wheel assembly is arranged in the mounting part, can rotate in two directions relative to the mounting part under the driving of the wrench body, and is fixed at the rotated position; first operation head subassembly, it includes first operation head and second operation head, first operation head and second operation head all have the operation portion that is used for swivel nut, second operation head detachably cover is established outside first operation head and can its relative movement so that two operation position stagger, first operation head with ratchet subassembly fixed connection, in order to be used for driving second operation head together with the ratchet subassembly linkage. The torque wrench provided by the embodiment of the invention is suitable for nuts of various sizes, and is simple and convenient to operate.

Description

Torque wrench

Technical Field

The embodiment of the invention relates to a torque wrench.

Background

At present, the spanner structure among the prior art is comparatively simple, and only can match with the nut of a size model, promptly, only can screw or unscrew the nut of a size, and application range is comparatively single. Moreover, in the wrench in the prior art, after the user rotates to a certain angle, for example, after the wrist of the user can rotate to the maximum angle, the user needs to turn the wrench by the reverse hand, which is very tedious to operate, and results in low working efficiency.

Disclosure of Invention

The embodiment of the invention provides the torque wrench which is applicable to nuts of various sizes and is simple and convenient to operate.

In order to solve the above technical problem, an embodiment of the present invention provides a torque wrench, including:

a wrench body including a handle and a mounting portion formed at a front end of the handle;

the ratchet wheel assembly is arranged in the mounting part, can rotate in two directions relative to the mounting part under the driving of the wrench body, and is fixed at the rotated position;

first operation head subassembly, it includes first operation head and second operation head, first operation head and second operation head all have the operation portion that is used for swivel nut, second operation head detachably cover is established outside first operation head and can its relative movement so that two operation position stagger, first operation head with ratchet subassembly fixed connection, in order to be used for driving second operation head together with the ratchet subassembly linkage.

As preferred, first operating head all is the column with the second operating head, the ratchet subassembly includes the ratchet, rotates to be located in the installation department and can with the ratchet card supports turn to the pawl and with it is used for making to turn to pawl elasticity counterbalance turn to the pawl with the ratchet separation, for the ratchet provides the elastic component who rotates the space, ratchet place plane perpendicular to the length direction of first operating head and second operating head, first operating head do not form the one end of operation portion with the ratchet links to each other.

Preferably, the steering pawl has opposite ends, at least one end of the steering pawl is exposed out of the mounting portion, and a toothed key is respectively arranged on the steering pawl adjacent to the two ends of the steering pawl and is used for being respectively engaged with the ratchet wheel to enable the ratchet wheel to rotate clockwise or anticlockwise.

Preferably, an installation cavity is arranged in the installation part, strip-shaped through holes are formed in the part, corresponding to the end part of the steering pawl, of the installation cavity in the moving direction of the end part of the steering pawl, the ratchet wheel and the steering pawl are arranged in the installation cavity, and two ends of the steering pawl extend out of the installation part through the corresponding through holes.

Preferably, the elastic part is a clamping wheel which is elastically arranged in the mounting part along the moving direction of the end part of the steering pawl, and an arc-shaped bulge which is acted with the clamping wheel is arranged at the position, corresponding to the clamping wheel, of the steering pawl.

Preferably, the outer side wall of the first operating head is matched with the operating part of the second operating head in structure so as to be capable of being matched and clamped with the second operating head, and the second operating head is forbidden to rotate relative to the first operating head.

Preferably, the first operating head and the second operating head are provided with elastic clamping balls and limiting grooves in a matched mode, so that the second operating head is allowed to move relative to the first operating head, and meanwhile the second operating head can be limited relative to the first operating head in position.

Preferably, a strip-shaped sliding groove is formed in the first operating head along the moving direction of the second operating head, a connecting piece is detachably arranged on the second operating head, and the connecting piece is located in the strip-shaped sliding groove and can slide along the strip-shaped sliding groove.

Preferably, the torque wrench further comprises a second operating head assembly, which includes a third operating head having the same structure as the first operating head and a fourth operating head having the same structure as the second operating head, wherein the third operating head is different from the first operating head in size of the nut, the fourth operating head is different from the second operating head in size of the nut, and the third operating head is connected to the ratchet.

Based on the disclosure of the above embodiments, the wrench of the embodiment of the present invention has the beneficial effects that the wrench can apply screwing and unscrewing operations to at least two types of nuts by arranging the sleeved first operating head assembly. Moreover, in the embodiment, the ratchet wheel assembly connected with the operating head assembly is arranged, so that when a user operates the wrench to screw or unscrew the nut, the user can adjust the angle of the wrench body relative to the nut by driving the ratchet wheel assembly after rotating a certain angle, namely, after the user rotates the maximum angle by one hand, the user can continue to screw or unscrew the nut without rotating the torque wrench or taking down the torque wrench to independently adjust the angle, and convenience is provided for the user.

Drawings

Fig. 1 is a schematic structural view of a torque wrench according to an embodiment of the present invention.

Fig. 2 is a partial structural schematic view of the torque wrench according to the embodiment of the present invention.

Fig. 3 is a partial structural schematic view of the torque wrench according to the embodiment of the present invention.

Fig. 4 is a partial structural schematic view of the torque wrench according to the embodiment of the present invention.

Reference numerals:

1-a handle; 2-an installation part; 3-a first operating head; 4-a second operating head; 5-an operation part; 6-ratchet wheel; 7-a steering pawl; 8-clamping the wheel; 9-tooth bond; 10-arc-shaped bulge; 11-a strip-shaped chute; 12-a connector; 13-a third operating head; 14-a fourth operating head; 15-through hole.

Detailed Description

The following detailed description of specific embodiments of the present invention is provided in connection with the accompanying drawings, which are not intended to limit the invention.

It will be understood that various modifications may be made to the embodiments disclosed herein. The following description is, therefore, not to be taken in a limiting sense, but is made merely as an exemplification of embodiments. Other modifications will occur to those skilled in the art within the scope and spirit of the disclosure.

The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the disclosure and, together with a general description of the disclosure given above, and the detailed description of the embodiments given below, serve to explain the principles of the disclosure.

These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment, given as a non-limiting example, with reference to the accompanying drawings.

It should also be understood that, although the invention has been described with reference to some specific examples, a person of skill in the art shall certainly be able to achieve many other equivalent forms of the invention, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

The above and other aspects, features and advantages of the present disclosure will become more apparent in view of the following detailed description when taken in conjunction with the accompanying drawings.

Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it is to be understood that the disclosed embodiments are merely examples of the disclosure that may be embodied in various forms. Well-known and/or repeated functions and structures have not been described in detail so as not to obscure the present disclosure with unnecessary or unnecessary detail. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present disclosure in virtually any appropriately detailed structure.

The specification may use the phrases "in one embodiment," "in another embodiment," "in yet another embodiment," or "in other embodiments," which may each refer to one or more of the same or different embodiments in accordance with the disclosure.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

As shown in fig. 1, 2, 3, and 4, an embodiment of the present invention provides a torque wrench, including:

a wrench body including a handle 1 and a mounting portion 2 formed at a front end of the handle 1;

the ratchet wheel 6 assembly is arranged in the mounting part 2, can rotate relative to the mounting part 2 under the driving of the wrench body and is fixed at the rotated position;

first operating head 3 subassembly, it includes first operating head 3 and second operating head 4, first operating head 3 and second operating head 4 all have the operation portion 5 that is used for swivel nut, and second operating head 4 detachably cover is established outside first operating head 3 and can be relative its removal so that 5 position stagger of two operation portions,

first operating head

3 and 6 subassembly fixed connection of ratchet for it together links with 6 subassemblies of ratchet to be used for driving second operating head 4.

The embodiment of the invention has the advantages that the first operating head 3 assembly which is sleeved is arranged, so that the wrench in the embodiment can apply screwing and unscrewing operations on at least two types of nuts, for example, the operating part 5 of the first operating head 3 can be used for operating a slightly smaller nut, such as a nut of M10, and the second operating head 4 is sleeved outside the first operating head 3, so that the size of the operating part 5 is larger than that of the operating part 5 of the first operating head 3, and the second operating head can operate a nut of M12, for example. In addition, in the embodiment, the ratchet 6 assembly connected to the operating head assembly is arranged, so that when a user operates the wrench to screw or unscrew the nut, the user can adjust the angle of the wrench body relative to the nut by driving the ratchet 6 assembly after rotating a certain angle, for example, after the user rotates the maximum angle by one hand of the wrist, so that the user can continue to screw or unscrew the nut without rotating the torque wrench by the opposite hand or taking off the torque wrench to independently adjust the angle, thereby providing convenience for the user.

Further, the mounting portion 2 and the handle 1 in this embodiment may be integrally formed, or may be detachably connected, such as a threaded connection, a snap connection, and the like, which is not unique. The mounting portion 2 in this embodiment has an insertion end which is inserted into the handle 1 to be connected with the handle 1.

The first operating head 3 and the second operating head 4 in this embodiment are both cylindrical, and specifically can be cylindrical, and the inner wall of the operating portion 5 is hexagonal to match the shape of the nut. The ratchet 6 subassembly sets up in installation department 2, it includes ratchet 6, the rotation is located in installation department 2 and can be used for making to turn to pawl 7 and ratchet 6 separation with turning to pawl 7 elasticity counterbalance of pawl 7 butt and being used for with the ratchet 6, the elastic component who provides the rotation space for ratchet 6, that is, turn to pawl 7 and can receive the drive force of ratchet 6 and elastic component in turn when ratchet 6 rotates, and then make to turn to pawl 7 and can constantly separate with the preceding ratchet of ratchet 6, and with the next ratchet meshing of cisoid, finally make ratchet 6 can rotate. In this embodiment, the plane of the ratchet 6 is perpendicular to the length direction of the first operating head 3 and the second operating head 4, and the end of the first operating head 3 not forming the operating portion 5 is fixedly connected to the ratchet 6, so that when a user rotates the first operating head 3 or the second operating head 4 through the wrench body, the ratchet 6 is driven to rotate.

Further, the installation cavity is arranged in the installation part 2 in the embodiment, the ratchet 6 is arranged in the installation cavity, the part of the installation cavity, which is provided with the ratchet 6, is hollow, namely, the installation cavity on two sides of the ratchet 6 is communicated with the outside, the first operating head 3 assembly is arranged on the installation cavity on one side of the ratchet 6, one end of the first operating head is arranged in the installation cavity and connected with the ratchet 6, and the other end, namely, one end of the operating part 5 is arranged outside the installation cavity.

The steering pawl 7 in this embodiment is bar shaped with opposite ends, and the steering pawl 7 is provided adjacent its ends with a toothed key 9 for engagement with the ratchet wheel 6. The steering pawl 7 is rotatably disposed in the mounting chamber at a portion of the ratchet 6 and the handle 1, and at least an end portion of the steering pawl is exposed to the outside, so that a user can drive the steering pawl 7 to rotate to select which end of the steering pawl 7 has the tooth key 9 engaged with the ratchet 6, thereby adjusting the rotation direction of the ratchet 6, such as clockwise rotation or counterclockwise rotation.

Furthermore, through holes 15 are formed in the two sides of the mounting chamber and correspond to the end portions of the steering pawls 7 respectively, the through holes 15 are strip-shaped long holes formed along the moving track of the end portions of the steering pawls 7, and the two ends of the steering pawls 7 extend out of the mounting portion 2 through the corresponding through holes 15 respectively for operation of a user. When the wrench body drives the ratchet wheel 6 to rotate, when the ratchet wheel 6 rotates by one ratchet, one end of the steering pawl 7 is meshed with the next ratchet, and the other end of the steering pawl 7 is abutted to one end, far away from the ratchet wheel 6, of the corresponding through hole 15, so that the steering pawl 7 is limited better, the phenomenon that the steering pawl 7 rotates easily to separate the meshed ends is avoided, and more stable torsion is provided for a user when the user rotates the nut by using the first operating head 3 or the second operating head 4.

Further, as shown in fig. 4, the elastic member in this embodiment is a catch wheel 8 elastically arranged in the mounting portion 2 along the moving direction of the end portion of the steering pawl 7, and an arc-shaped protrusion 10 corresponding to the catch wheel 8 is arranged on the steering pawl 7. In this embodiment, the inserting end of the installation part 2 is provided with a limiting groove communicated with the installation cavity, a spring is arranged in the limiting groove, one end of the spring facing the installation cavity is connected with the clamping wheel 8, and at least part of the clamping wheel 8 extends out of the limiting groove to enter the installation cavity and is abutted to the arc-shaped protrusion 10. The arc-shaped bulge 10 is provided with two arc surfaces, when one tooth key 9 of the steering pawl 7 is meshed with the ratchet wheel 6, the arc surface far away from the tooth key 9 is attached to the clamping wheel 8 and abuts against the clamping wheel, when the ratchet wheel 6 rotates, the arc-shaped bulge 10 pushes the clamping wheel 8 towards the limiting groove through the arc surface attached to the clamping wheel 8, and then the ratchet wheel 6 is separated from the tooth key 9 which is meshed with the previous part and is meshed with the next ratchet.

Further, the outside of first operating head 3 in this embodiment matches with the operation portion 5 structure of second operating head 4 to make the outer wall of first operating head 3 can with the inner wall of second operating head 4, the cooperation block of operation portion 5 of second operating head 4 promptly, because all be hexagonal structure in the operation portion 5, therefore can effectively forbid the relative first operating head 3 rotation of second operating head 4, avoid influencing user's swivel nut because the relative rotation of the two. Moreover, when in actual application, two operating heads can extend the hexagonal structure along length direction to play better limiting displacement, can also play the guide second operating head 4 simultaneously and remove, make it remove according to fixed orbit.

Further, in the present embodiment, a bar-shaped sliding groove 11 is disposed on the first operating head 3 along the moving direction of the second operating head 4, a connecting member 12 is detachably disposed on the second operating head 4, and the connecting member 12 is connected with the bar-shaped sliding groove 11 and can slide along the same. This connecting piece 12 specifically can be a bolt, and this bolt one end is fixed on second operating head 4, and in the other end gos deep into bar spout 11, because bar spout 11 is the linear type, so under the effect of this bar spout 11 and connecting piece 12, can prevent the first operating head 3 of 4 slippage of second operating head, can assist the removal orbit of correcting second operating head 4 moreover, promptly, plays certain guide effect.

Preferably, when the second operating head 4 moves to the target position, that is, the operating portion 5 is exposed outside, and can be sleeved on the nut to rotate the nut, in order to limit the second operating head 4, an elastic clamping bead and a limiting groove are arranged between the first operating head 3 and the second operating head 4 in the embodiment in a matching manner, so as to allow the second operating head 4 to move relative to the first operating head 3, and simultaneously, the position of the second operating head 4 relative to the first operating head 3 can be limited.

Preferably, in order to further increase the application range of the torque wrench, the torque wrench in this embodiment further includes a second operating head 4 assembly, which includes a third operating head 13 having the same structure as the first operating head 3 and a fourth operating head 14 movably sleeved outside the third operating head 13 and having the same structure as the second operating head 4, wherein the third operating head 13 is different in size from the nut for rotating used in the operating part 5 of the first operating head 3, the fourth operating head 14 is different in size from the nut for rotating used in the operating part 5 of the second operating head 4, and the third operating head 13 is connected to the ratchet 6. That is, the third operating head 13 is different in size from the first operating head 3 only but has the same structure, and the fourth operating head 14 is different in size from the second operating head 4 only but has the same structure. So set up, can make the torque wrench in this embodiment can twist reverse the nut of four kinds of size models at least, greatly increased torque wrench's application scope, the user need not to prepare the spanner of multiple specification, only use a spanner alright operate the nut of four kinds of sizes, for the user provides convenience, improved the operating efficiency simultaneously.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. A torque wrench, comprising:

the ratchet wheel assembly is arranged in the mounting part, can rotate relative to the mounting part under the driving of the wrench body and is fixed at the rotated position;

2. The torque wrench according to claim 1, wherein the first operating head and the second operating head are both cylindrical, the ratchet assembly includes a ratchet, a rotating pawl disposed in the mounting portion and capable of being engaged with the ratchet, and an elastic member elastically abutting against the rotating pawl for separating the rotating pawl from the ratchet to provide a rotating space for the ratchet, the plane of the ratchet is perpendicular to the length direction of the first operating head and the second operating head, and the end of the first operating head not forming the operating portion is connected to the ratchet.

3. The torque wrench according to claim 2, wherein the steering pawl has opposite ends, at least one end of the steering pawl is exposed from the mounting portion, and the steering pawl is provided with a toothed key adjacent each of the opposite ends for engaging the ratchet wheel to rotate the ratchet wheel either clockwise or counterclockwise.

4. The torque wrench according to claim 3, wherein a mounting cavity is formed in the mounting portion, strip-shaped through holes are formed in portions of the mounting cavity corresponding to the end portions of the steering pawls along a moving direction of the end portions of the steering pawls, the ratchet wheel and the steering pawls are arranged in the mounting cavity, and two ends of each steering pawl extend out of the mounting portion through the corresponding through hole.

5. The torque wrench according to claim 4, wherein the resilient member is a catch wheel elastically disposed in the mounting portion along a moving direction of an end portion of the steering pawl, and an arc-shaped protrusion corresponding to the catch wheel is disposed on the steering pawl.

6. The torque wrench as claimed in claim 2, wherein the outer side wall of the first operating head is configured to mate with the operating portion of the second operating head to enable mating engagement with the second operating head to inhibit rotation of the second operating head relative to the first operating head.

7. The torque wrench as claimed in claim 6, wherein the first operating head and the second operating head are provided with a resilient locking bead and a limiting groove to allow the second operating head to move relative to the first operating head and limit the position of the second operating head relative to the first operating head.

8. The torque wrench according to claim 7, wherein the first operating head is provided with a strip-shaped sliding groove along a moving direction of the second operating head, and the second operating head is detachably provided with a connecting member which is located in the strip-shaped sliding groove and can slide along the strip-shaped sliding groove.

9. The torque wrench according to claim 8, further comprising a second operating head assembly including a third operating head having the same structure as the first operating head and a fourth operating head having the same structure as the second operating head and movably sleeved outside the third operating head, wherein the third operating head is different from the first operating head in size of the nut for rotation, the fourth operating head is different from the second operating head in size of the nut for rotation, and the third operating head is connected to the ratchet.