CN220162331U - Connecting part and torque wrench - Google Patents

Abstract

The utility model discloses a connecting part and a torque wrench, wherein the connecting part is used for the torque wrench, the torque wrench comprises a holding rod part and a clamping joint, the clamping joint is provided with a clamping structure, and the clamping structure is used for clamping and fixing a fastener.

Description

Connecting part and torque wrench

Technical Field

The utility model relates to the technical field of torque wrenches, in particular to a connecting part and a torque wrench.

Background

The torque wrench generally comprises a holding rod, a clamping connector and a connecting rod arranged between the clamping connector and the holding rod, wherein the clamping connector is provided with a clamping structure for clamping and installing the sleeve, so that the clamping connector can freely switch sleeves with different specifications. Thus, the fasteners such as the outer hexagon bolts and the inner hexagon bolts are fixed relative to the clamping joint through the sleeve, so that the clamping joint can stably transmit torque to the fasteners. Of course, the main-stream torque wrench product is also provided with a ratchet structure on the clamping connector, and the clamping structure is arranged on a ratchet of the ratchet structure, so that a user can operate the torque wrench conveniently.

It will be appreciated that the connecting rod between the grip and the bayonet is an important torque transmission member of a torque wrench, and the cross-sectional shape of the connecting rod in a plane perpendicular to the length direction of the grip is generally circular, i.e. the bayonet is connected to the grip by a cylindrical connecting rod. Although cylindrical connecting rods are round and attractive, under the condition of the same cross-sectional area, the bending resistance of the connecting rods is not optimal. Therefore, there is a need for an improved connecting rod for torque wrenches that improves the bending resistance.

Disclosure of Invention

The utility model mainly aims to provide a torque wrench, which aims to adopt a connecting part with a convex polygon or a concave polygon in cross section so as to enhance the bending resistance of the torque wrench and enable the torque wrench to be more durable.

In order to achieve the above object, the present utility model provides a connection portion for a torque wrench, the torque wrench including a grip portion and a clip, the clip having a clip structure for clipping with a fastener, the connection portion being connected between the grip portion and the clip, the connection portion being defined as a cross section on a plane perpendicular to a longitudinal direction of the grip portion, the cross section of the connection portion being configured as a parallel polygon, a convex polygon or a concave polygon

Optionally, at least one side surface of the connecting part is provided with a weight-reducing groove, so that the cross section shape of the connecting part is shaped into a concave polygon.

Optionally, the two opposite sides of the connecting part are respectively provided with the weight reducing groove.

Optionally, the connecting portion has two first sides that set up relatively along the axis direction of joint structure, the heavy groove of subtracting is located the first side.

Optionally, the connecting part further has two opposite second sides, the second sides connect the two first sides, and the second sides are arranged in a plane.

Optionally, the bottom surface of the weight-reducing groove and the side surface of the groove are in cambered surface transition arrangement.

Optionally, the groove side surface of the weight reduction groove and the first side surface are in cambered surface transition arrangement.

Optionally, the first side surface and the second side surface are in cambered surface transition arrangement.

Optionally, a groove side surface of the weight-reducing groove, which is close to the clamping connector, and a corresponding side surface of the clamping connector are configured to be of the same structure.

Optionally, the torque wrench further includes a display module, the display module includes a display, a circuit board connected with the display, and a function key connected with the circuit board, the display and the function key are both exposed and arranged on the holding rod portion, and the display is used for displaying the torque value.

Alternatively, the cross-sectional shape of the connection portion is configured as an i-shape, a square shape, or a parallelogram shape.

Optionally, the grip portion includes a grip section and an extension section, the extension section and the grip section are detachably connected, and the extension section and the connection section are detachably connected, and the grip section and the connection section are detachably connected.

The utility model also provides a torque wrench, which is characterized by comprising:

a grip portion;

the clamping connector is provided with a clamping structure which is used for being clamped and fixed with a fastener; and

the connecting part is connected between the holding rod part and the clamping connector, the cross section of the connecting part on a plane perpendicular to the length direction of the holding rod part is defined as a cross section, and the cross section of the connecting part is configured into a convex polygon or a concave polygon.

Optionally, the connecting portion is detachably connected to the clamping connector, and/or the connecting portion is detachably connected to the grip portion.

Optionally, the torque wrench further includes a base plate, and a ratchet structure disposed on the base plate, and the clamping structure is disposed on a ratchet of the ratchet structure.

According to the technical scheme, the cross section shape of the connecting part connecting the clamping connector and the holding rod part is configured into the convex polygon or the concave polygon, so that the bending resistance of the connecting part is enhanced, and the torque wrench can be better used. The cross section of the beam on the plane perpendicular to the length direction is defined as the cross section, and it can be understood that under the condition that the cross sections of the beams are the same, the modulus of the bending-resistant cross section is sequentially arranged into an I shape, a rectangle and a circle, therefore, the bending-resistant performance of the connecting part can be enhanced by the concave polygon and the convex polygon cross sections represented by the I shape and the rectangle, and further the bending-resistant performance of the torque wrench is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a torque wrench according to an embodiment of the present utility model;

FIG. 2 is a schematic view of another embodiment of a torque wrench according to the present utility model;

FIG. 3 is a top view of the embodiment of FIG. 1;

FIG. 4 is a top view of the embodiment of FIG. 2;

FIG. 5 is a cross-sectional view taken at A-A of FIG. 3;

FIG. 6 is a cross-sectional view at B-B in FIG. 4;

fig. 7 is a cross-sectional view at C-C in fig. 4.

Reference numerals illustrate:

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The present utility model proposes a connection portion 30, in an embodiment of the present utility model, for a torque wrench, the torque wrench includes a grip portion 10 and a clamping head 20, the clamping head is provided with a clamping structure 22, the clamping structure 22 is used for clamping with a fastener, the connection portion 30 is connected between the grip portion 10 and the clamping head 20 as shown in fig. 1 to 7, a cross section of the connection portion 30 on a plane perpendicular to a length direction of the grip portion 10 is defined as a cross section, and a cross section shape of the connection portion 30 is configured as a parallel polygon, a convex polygon or a concave polygon.

According to the technical scheme of the utility model, the cross section of the connecting part 30 connecting the clamping connector 20 and the holding rod part 10 is configured into a convex polygon or a concave polygon, for example, the cross section of the connecting part 30 can be configured into an I shape, a square shape or a parallelogram shape, so that the bending resistance of the connecting part is enhanced, and the torque wrench can be better used. The cross section of the beam on the plane perpendicular to the length direction is defined as the cross section, and it can be understood that under the condition that the cross sections of the beams are the same, the modulus of the bending-resistant cross section is sequentially arranged into an I shape, a rectangle and a circle, therefore, the bending-resistant performance of the connecting part can be enhanced by the concave polygon and the convex polygon cross sections represented by the I shape and the rectangle, and further the bending-resistant performance of the torque wrench is enhanced.

Optionally, at least one side of the connection part 30 is provided with a weight-reducing groove 31 so that the cross-sectional shape of the connection part 30 is shaped as a concave polygon. At this time, the cross section of the connecting portion 30 is concave with a thicker bottom surface, which reduces the weight of the connecting portion 30 and does not affect the bending resistance of the connecting portion 30. In other embodiments, no weight-reducing groove 31 is provided on either side of the connecting portion 30, i.e., the cross-section of the connecting portion 30 is configured as a square or other polygon.

Alternatively, the opposite sides of the connection part 30 are provided with weight-reducing grooves 31. At this time, the cross section of the connecting portion 30 has a double-sided concave I-shaped structure, which reduces the material cost and the weight, and has excellent bending resistance. In other embodiments, the connecting portion 30 has a weight-reducing groove 31 on only one side.

As shown in fig. 6, alternatively, the connecting portion 30 has two first side surfaces 32 disposed opposite to each other along the axial direction of the engaging structure 22, and the weight-reducing groove 31 is provided on the first side surfaces 32. At this time, two oppositely disposed force receiving plates 34 on the i-like structure are arranged at intervals in a direction perpendicularly intersecting the axial direction of the engagement structure 22. During the use of the torque wrench, the user drives the grip portion 10 to rotate around the axis of the clamping structure 22, so that the clamping structure can tighten or loosen the fastener, in this process, the force application direction of the user to the grip portion is the direction perpendicular to the axis direction of the clamping structure 22, that is, the side surface of the connecting portion 30 in this direction is most easily deformed, and in the i-shaped structure, the most bending-resistant parts are the two stress plates 34, so that the two stress plates 34 are arranged along the direction perpendicular to the axis direction of the clamping structure 22, so that the connecting portion 30 has better bending resistance in this direction. In other embodiments, when the cross-sectional shape of the connecting portion 30 is rectangular, the sides corresponding to the two longer sides of the rectangular shape are arranged along the axial direction of the engaging structure 22.

As shown in fig. 6, the connecting portion 30 may further have two opposite second side surfaces 33, where the second side surfaces 33 connect the two first side surfaces 32, and the second side surfaces 33 are disposed in a plane. That is, the concave polygon is configured in an I shape, and has better bending resistance, and meanwhile, the concave polygon is easier to form and saves materials. In other embodiments, the second side 33 has a convex configuration.

Alternatively, the groove bottom surface 311 of the weight-reducing groove 31 and the groove side surface 312 are in arc surface transition, the groove side surface 312 of the weight-reducing groove 31 and the first side surface 32 are in arc surface transition, and the first side surface 32 and the second side surface 33 are in arc surface transition. In this way, stress concentration can be reduced, stress at the connecting portion 30 can be uniformly dispersed, stress strength of the connecting portion 30 can be enhanced, and demolding molding or punching of the weight-reducing groove 31 is facilitated in the production process. In other embodiments, no cambered surface transition structure is provided between the groove bottom surface 311 and the groove side surface 312 of the weight-reducing groove 31; or the groove side surface 312 of the weight-reducing groove 31 and the first side surface 32 do not have an arc surface transition structure; or the first side 32 and the second side 33 have no cambered surface transition structure therebetween.

For convenience of writing, the arc surface between the groove bottom surface 311 and the groove side surface 312 of the weight-reducing groove 31 is defined as a first arc surface 313, the arc surface between the groove side surface 312 and the first side surface 32 of the weight-reducing groove 31 is defined as a second arc surface 314, and the arc surface between the first side surface 32 and the second side surface 33 is defined as a third arc surface 315, optionally, the first arc surface 313 is configured as an inward concave arc surface, the second arc surface 314 is configured as an outward convex arc surface, and the third arc surface 315 is configured as an outward convex arc surface.

Further alternatively, the groove bottom surface 311 and the groove side surface 312 of the weight-reducing groove 31 are also configured as concave cambered surfaces and are in smooth transition with the first cambered surface 313, that is, the groove bottom surface 311, the groove side surface 312 and the first cambered surface 313 form a large concave cambered surface, and as shown in fig. 6, the arcs of the groove bottom surface 311, the groove side surface 312 and the first cambered surface 313 on the cross section form a continuous circular arc line. In this way, the stress concentration at the connection portion can be further reduced, and when the groove side wall 316 of the weight-reduction groove 31 receives stress, the first cambered surface 313 can effectively transmit force to the groove bottom wall 317, thereby reinforcing the receiving strength of the i-shaped structure.

Generally, in the i-shaped structure, the stress strength of the two side plates at the end part far from the center of the cross beam is low, and deformation is easy to occur. The second cambered surface 314 and the third cambered surface 315 are arranged, so that the groove side wall 316 can smoothly transition on the outer wall surface of the end part far away from the groove bottom wall 317, the stress concentration of the end part is reduced, and the moment born by the end part can be transmitted and dispersed to the bottom of the groove side wall 316, the connection part of the groove side wall 316 and the groove bottom wall 317 more, so that the risk of deformation of the end part is reduced, namely the stress intensity of the end part is improved. In addition, when the end of the groove sidewall 316 of the present utility model is subjected to an accidental impact, the second and third cambered surfaces 314 and 315 thereon make the end less prone to the problem of corner chipping than the groove sidewall structure having corners.

As shown in fig. 6, further alternatively, the cross-sectional shape of the first side 32 on a plane perpendicular to the length direction of the grip portion 10 is arranged as an outer convex arc surface and is arranged in smooth transition with the third arc surface 315, which is beneficial to reducing stress concentration in the third arc surface and the transition region between the connecting portion and the clamping connector, and the material consumption in the transition region between the connecting portion and the clamping connector is increased, so that the stress bearing capability is improved, and the risk of deformation of the end portion is reduced.

The radian of the first cambered surface 313 is the largest, the radian of the third cambered surface 315 is the smallest, and the radian of the second cambered surface 314 is the largest because the first cambered surface 313 needs to bear the largest force, and the large-radian structure is arranged to help strengthen the bearing capacity of stress, one end of the second cambered surface 314 is connected with the first cambered surface 313, and the other end is connected with the third cambered surface 315, so that the stress can be better transferred and dispersed through a smaller radian, one end of the third cambered surface 315 is connected with the straight line section of the groove side wall 316, and the wall thickness of the groove side wall 316 is limited, so that the required radian is larger than the second cambered surface 314 and cannot be too large, and the good stress bearing capacity can be realized on the premise of being formed on the groove side wall 316.

As shown in fig. 2 and 7, alternatively, a groove side 312 of the weight-reduction groove 31 near the bayonet 20 is configured in the same structure as a corresponding side of the bayonet 20. That is, the first arc surface 313 far away from the clamping connector 20 is configured as a concave arc surface with a larger curvature, and the first arc surface 313 near the clamping connector 20 is configured as a transition arc surface 313a with a smaller curvature, at this time, the material consumption between the clamping connector 20 and the weight-reducing groove 31 is increased, which is beneficial to enhancing the torque transmission capability of the clamping connector 20 and the connecting portion 30 and reducing the stress concentration. Secondly, the joint of the clamping connector 20 and the connecting part 30 is provided with a curved surface in smooth transition with the clamping connector 20, and the aesthetic property of the torque wrench can be improved. In other embodiments, a groove side 312 of the weight-reducing groove 31 near the bayonet 20 is configured differently from a corresponding side of the bayonet 20.

The utility model also provides a torque wrench, which comprises a holding rod portion 10, a clamping connector 20 and a connecting portion 30, wherein the specific structure of the connecting portion 30 refers to the above embodiment, and the torque wrench at least has all the beneficial effects brought by the technical solutions of the above embodiments because the torque wrench adopts all the technical solutions of the above embodiments, and the detailed description is omitted herein. The clamping connector 20 is provided with a clamping structure 22, and the clamping structure 22 is used for being clamped and fixed with a fastener; and

the connecting part 30 is connected between the grip part 10 and the clamping head 20, and defines a cross section of the connecting part 30 on a plane perpendicular to the length direction of the grip part 10 as a cross section, and the cross section of the connecting part 30 is configured as a convex polygon or a concave polygon.

As shown in fig. 2 and 4, alternatively, the grip portion 10 includes a grip portion 11 and an extension portion 12, the extension portion 12 is provided in a cylindrical structure, the cross-sectional profile of the connecting portion 30 is smaller than that of the extension portion 12, that is, the cross-sectional shape of the connecting portion 30 is located within the cross-sectional shape of the extension portion 12 on a reference plane perpendicular to the length direction of the extension portion 12, the connecting portion 30 is connected to the grip portion 10 through a transition portion 50, and specifically, the outer peripheral surface of the transition portion 50 is provided in a substantially conical mesa. In this way, the transition portion 50 can perform a good transition function to reduce stress concentration between the connecting portion 30 and the grip portion 10 and to improve torque transmission capability of the connecting portion 30, the transition portion 50 and the grip portion 10. Of course, in other embodiments, the extension 12 may be configured in a truncated cone structure, and the small end of the extension 12 is connected to the connecting portion 30, and the end surface profile of the small end of the extension 12 is the same as the corresponding end surface profile of the connecting portion 30, so that the small end of the extension 12 can directly and smoothly transition to the connecting portion 30 without providing the transition portion 50.

Specifically, as shown in fig. 5 or fig. 6, fig. 5 is a cross-sectional view of an embodiment of the torque wrench of the present utility model in a cross-section of the connecting portion 30, wherein the cross-sectional shape of the connecting portion 30 is rectangular, and fig. 6 is a cross-sectional view of another embodiment of the torque wrench of the present utility model in a cross-section of the connecting portion 30, wherein the cross-sectional shape of the connecting portion 30 is i-shaped.

Alternatively, the clamping structure 20 is configured as a clamping post, and the end of the sleeve is sleeved on the outer peripheral surface of the clamping post. Of course, in other embodiments, the locking structure 20 may be a locking barrel, and in this case, the end of the sleeve is inserted into the locking barrel.

Optionally, the torque wrench further includes a base plate 23, a ratchet structure 21 disposed on the base plate, and the clamping structure 22 is disposed on a ratchet of the ratchet structure 21. Therefore, the torque wrench can be conveniently operated by a user. Of course, in other embodiments, the ratchet structure may not be provided, and the clamping structure may be directly fixed on the base plate.

As shown in fig. 1, the torque wrench further includes a display module 40, the display module 40 includes a display 41, a circuit board connected to the display 41, and a function key 42 connected to the circuit board, wherein the display 41 and the function key 42 are both exposed on the grip portion 10, and the display 41 is used for displaying a torque value. The user can directly observe the numerical change of the display 41 by eyes while controlling the handle sleeve to perform the pulling action by hands until the torque reaches the set value of the user, in the process, the user can preset the torque value through the function keys 42, and after the actual torque value reaches the preset torque value, the display module 40 can warn to remind the user. In other embodiments, the display module 40 includes only the display 41, where the display 41 is configured as a dial display 41, and is only capable of displaying the torque value of the current torque wrench.

As shown in fig. 1, the grip portion 10 may alternatively include a grip portion 11 and an extension portion 12, the extension portion 12 being detachably connected to the grip portion 11 and detachably connected to the connecting portion 30, and the grip portion 11 being detachably connected to the connecting portion 30. The extension sections 12 are distributed and detachably arranged on the holding sections 11 and the connecting parts 30, so that the extension sections 12 can extend the application range of the clamping connector 20, and the clamping connector 20 can extend into the machine through a gap for operation. It should be noted that the display module 40 is disposed on the holding section 11. In other embodiments, the extension 12 may not be provided.

Optionally, the connecting portion 30 is detachably connected to the bayonet joint 20, and/or the connecting portion 30 is detachably connected to the grip portion 10. In this way, the torque wrench is enabled to replace different models of the bayonet 20. In other embodiments, the clip 20, the connecting portion 30, and the grip 10 are integrally formed.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (10)

1. The utility model provides a connecting portion for torque wrench, torque wrench includes grip portion and joint, the joint is equipped with the joint structure, the joint structure is used for with the fastener card solid, its characterized in that, connecting portion connect grip portion with between the joint, define the connecting portion is the cross section on the plane of perpendicular to the length direction of grip portion, the cross section shape of connecting portion disposes to parallel polygon, convex polygon or concave polygon.

2. The connector of claim 1, wherein at least one side of the connector is provided with a weight-reducing slot to shape the cross-sectional shape of the connector into a concave polygon.

3. The connection according to claim 2, wherein the weight-reducing grooves are provided on opposite sides of the connection.

4. A connecting portion according to claim 3, wherein the connecting portion has two first side surfaces disposed opposite to each other in the axial direction of the engaging structure, and the weight-reducing groove is provided in the first side surfaces.

5. The connector of claim 4, further comprising two opposing second sides, wherein the second sides connect the two first sides, and wherein the second sides are disposed in a plane.

6. The connecting part according to claim 5, wherein the bottom surface of the weight-reducing groove and the side surface of the groove are in cambered surface transition arrangement;

and/or the groove side surface of the weight-reducing groove and the first side surface are in cambered surface transition arrangement;

and/or the first side surface and the second side surface are in cambered surface transition arrangement;

and/or a groove side surface of the weight-reducing groove, which is close to the clamping connector, and a corresponding side surface of the clamping connector are configured to be of the same structure.

7. The connection portion of claim 1, wherein the torque wrench further comprises a display module, the display module comprises a display, a circuit board connected with the display, and a function key connected with the circuit board, the display and the function key are both exposed and arranged on the grip portion, and the display is used for displaying a torque value;

and/or the cross-sectional shape of the connecting part is configured to be I-shaped, square or parallelogram.

8. A torque wrench, comprising:

a grip portion;

the clamping connector is provided with a clamping structure which is used for being clamped and fixed with a fastener; and

the connecting portion according to any one of claims 1 to 7, wherein the connecting portion is connected between the grip portion and the clip, a cross section of the connecting portion on a plane perpendicular to a longitudinal direction of the grip portion is defined as a cross section, and a cross-sectional shape of the connecting portion is configured as a convex polygon or a concave polygon.

9. The torque wrench of claim 8, wherein the grip portion includes a grip section and an extension section, the extension section being detachably connected to the grip section and to the connection section, the grip section being detachably connected to the connection section.

10. The torque wrench of claim 8, wherein the connection portion is detachably connected to the chuck and/or the connection portion is detachably connected to the grip portion;

and/or, the torque wrench further comprises a base plate and a ratchet structure arranged on the base plate, and the clamping structure is arranged on a ratchet of the ratchet structure.