CN219521930U - T-shaped wrench assembly - Google Patents

Abstract

The present disclosure relates to a T-wrench assembly, comprising: a T-wrench including a transverse bar and a vertical bar extending toward one side of the transverse bar in a direction perpendicular to the transverse bar; an extension bar comprising an interior cavity for receiving at least a portion of a transverse bar of a T-wrench; the self-locking mechanism comprises a clamping structure arranged near the opening end of the inner cavity of the extension rod, an elastic mechanism arranged at a preset position in the inner cavity of the extension rod, and at least one protruding part arranged at a preset position of the transverse rod of the T-shaped wrench; when the extension bar is connected to the transverse bar of the T-shaped wrench, the elastic mechanism presses the protruding part against the clamping structure so as to lock the connection between the extension bar and the transverse bar of the T-shaped wrench. By means of the pressing action of the elastic mechanism, the protruding part is firmly kept in the clamping structure, so that the extension rod cannot be disconnected with the T-shaped spanner no matter what orientation the extension rod is in, and the extension rod is prevented from falling off the T-shaped spanner to hurt people.

Description

T-shaped wrench assembly

Technical Field

The present disclosure relates generally to the technical field of machine manufacturing. More particularly, the present disclosure relates to a wrench assembly with a self-locking function that allows for an extendable moment arm.

Background

Screws or bolts are the most common mechanical attachment parts. In the installation of large screws or bolts, a wrench, such as a T-wrench, is often required to ensure the reliability of the fastening of the screw or bolt connection. The longer the transverse bar of the T-wrench, the greater the tightening force that can be transmitted to the screw or bolt. In some cases, extension bars are required to increase the length of the transverse bar of the T-wrench. The purpose of the extension bar is to extend the moment arm of the T-wrench and thus increase the moment of the wrench, thereby achieving an effect of more easily tightening a screw or bolt. For example, a T-wrench may be used alone without requiring too much force during the initial stage of installing the screw or bolt; as the installation process proceeds, more and more force is required to screw and lock the screw or bolt, and an extension bar is required to increase the torque of the wrench.

The extension bar currently in use is a simple sleeve that can be simply inserted into the transverse bar of a T-wrench to increase the length of the transverse bar. However, the connection between such extension bars and the wrench is not provided with a locking means, and thus there is a possibility that the person may be injured by falling off during use. For example, if the extension bar is oriented vertically downward or the extension bar is axially forced to slide out of the transverse bar of the T-wrench, the extension bar is easily disengaged from the transverse bar of the T-wrench. For a large T-shaped spanner, the weight of the extension rod can reach about 20 kg. If the extension bar is hit by a person, serious injury is easily caused.

Disclosure of Invention

It is an object of the present disclosure to address one or more of the above problems, as well as other problems, and to achieve additional advantages.

One aspect of the present disclosure provides a T-wrench assembly. The T-wrench assembly includes: a T-wrench including a transverse bar and a vertical bar extending toward one side of the transverse bar in a direction perpendicular to the transverse bar; an extension bar comprising an interior cavity for receiving at least a portion of a transverse bar of the T-wrench; the self-locking mechanism comprises a clamping structure, an elastic mechanism and at least one protruding part, wherein the clamping structure is arranged near the opening end of the inner cavity of the extension rod, the elastic mechanism is arranged at a preset position in the inner cavity of the extension rod, and the protruding part is arranged at a preset position of the transverse rod of the T-shaped wrench; wherein when the extension bar is connected to the transverse bar of the T-wrench, the elastic mechanism presses the protruding part in the clamping structure so as to lock the connection between the extension bar and the transverse bar of the T-wrench.

According to one embodiment of the disclosure, the clamping structure comprises a through groove which is arranged on the side wall of the extension rod and is communicated with the inner cavity of the extension rod, and the through groove is in a nonlinear shape and comprises an opening for the protrusion part to enter and a closed end for the elastic mechanism to press against the protrusion part.

According to one embodiment of the present disclosure, the through slots include a first through slot extending in a first direction, a second through slot extending downwardly from the first through slot along an outer circumference of the extension bar, and a third through slot extending from the second through slot in a second direction different from the first direction, wherein the first direction is a direction from an open end of the inner cavity of the extension bar toward a deep side of the inner cavity of the extension bar, and the second direction is a direction from a deep side of the inner cavity of the extension bar toward an open end of the inner cavity of the extension bar, and wherein the first through slot includes the opening, and the third through slot includes the closed end.

According to one embodiment of the present disclosure, the elastic means comprises a spring element.

According to one embodiment of the present disclosure, the lumen of the extension rod extends through only a portion of the extension rod, wherein the spring element is placed at the closed end of the lumen.

According to one embodiment of the present disclosure, the inner cavity of the extension rod extends through the entire extension rod, wherein the elastic mechanism further comprises a support for supporting the spring element within the inner cavity, and wherein the support is fixed in the inner cavity for supporting the spring element.

According to one embodiment of the present disclosure, the outer circumference of the support is provided with apertures for receiving fastening elements that extend through the wall of the extension rod and into the apertures of the support to secure the support in the lumen of the extension rod.

According to one embodiment of the present disclosure, the spring element is a coil spring or a leaf spring.

According to one embodiment of the present disclosure, the protrusion is integrally formed with a transverse bar of the T-wrench.

According to one embodiment of the present disclosure, the protrusion is a screw or bolt screwed into the transverse bar of the T-wrench or a pin shaft embedded in the transverse bar of the T-wrench.

According to one embodiment of the present disclosure, the free end of the vertical rod of the T-wrench comprises a feature that cooperates with the end of the screwed element to screw the screwed element, the feature being configured to be inserted into an insert provided in a groove of the end of the screwed element or a sleeve configured to receive the end of the screwed element. .

It is noted that aspects of the present disclosure described with respect to one embodiment may be incorporated into other and different embodiments, although not specifically described with respect to the other and different embodiments. In other words, all embodiments and/or features of any embodiment may be combined in any way and/or combination, provided that they are not mutually contradictory.

Drawings

The various aspects of the disclosure will be better understood upon reading the following detailed description in conjunction with the drawings in which:

fig. 1 schematically illustrates a T-wrench assembly according to one embodiment of the present disclosure.

Fig. 2 schematically illustrates a T-wrench included in the T-wrench assembly of fig. 1.

Fig. 3 schematically illustrates an extension bar included in the T-wrench assembly of fig. 1.

Fig. 4 schematically illustrates a spring mechanism disposed within the extension rod of fig. 3.

Fig. 5 to 8 schematically show the connection of the extension bar to the T-wrench.

It should be understood that throughout the drawings, like reference numerals refer to like elements. In the drawings, the size of some of the features may be altered and not drawn to scale for clarity.

Detailed Description

The present disclosure will be described below with reference to the accompanying drawings, which illustrate several embodiments of the present disclosure. It should be understood, however, that the present disclosure may be presented in many different ways and is not limited to the embodiments described below; indeed, the embodiments described below are intended to more fully convey the disclosure to those skilled in the art and to fully convey the scope of the disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide yet additional embodiments.

It should be understood that the terminology used in the description is for the purpose of describing particular embodiments only, and is not intended to be limiting of the disclosure. All terms (including technical and scientific terms) used in the specification have the meanings commonly understood by one of ordinary skill in the art unless otherwise defined. Well-known functions or constructions may not be described in detail for brevity and/or clarity.

As used in this specification, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. The use of the terms "comprising," "including," and "containing" in the specification mean that the recited features are present, but that one or more other features are not excluded. The use of the phrase "and/or" in the specification includes any and all combinations of one or more of the associated listed items.

In the description, an element is referred to as being "on," "attached" to, "connected" to, "coupled" to, "contacting" or the like another element, and the element may be directly on, attached to, connected to, coupled to or contacting the other element or intervening elements may be present.

In the description, the terms "first," "second," "third," and the like are used for ease of description only and are not intended to be limiting. Any feature expressed as "first," "second," "third," etc. is interchangeable.

In the specification, spatial relationship words such as "upper", "lower", "front", "rear", "top", "bottom", and the like may describe the relationship of one feature to another feature in the drawings. It will be understood that the spatial relationship words comprise, in addition to the orientations shown in the figures, different orientations of the device in use or operation. For example, when the device in the figures is inverted, features that were originally described as "below" other features may be described as "above" the other features. The device may also be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial relationship will be explained accordingly.

Referring to fig. 1-4, a T-wrench assembly 10 is shown according to one embodiment of the present disclosure. The T-wrench assembly 10 may include a T-wrench 100, an extension bar 200, and a self-locking mechanism 300.

As shown in fig. 2, the T-wrench 100 may include a transverse bar 101 and a vertical bar 102. The vertical rod 102 may extend toward one side of the transverse rod 101 in a direction substantially perpendicular to the transverse rod 101. Preferably, the vertical rod 102 may extend from the intermediate position of the transverse rod 101 in a direction substantially perpendicular to the transverse rod 101 towards one side of the transverse rod 101, thereby dividing the transverse rod 101 into a first section and a second section equal to each other. The free end of the vertical rod 102 may include a feature 103 that mates with an end of a screwed element (e.g., a screw, bolt, or the like) to screw the screwed element. In the embodiment shown in fig. 1 and 2, the feature 103 is configured as an insert. The insert may be in the form of a solid post and is insertable into a recess provided in the end of the screwed element. The outer circumference of the insertion portion may be configured to have a shape complementary to the inner circumference of a groove provided at an end of the screwed element so as to be able to rotate the screwed element when the T-wrench is rotated. For example, the outer periphery of the insertion portion may have a cross quincuncial shape so as to be capable of being inserted into a screwed element having a cross-shaped groove; or the outer periphery of the insertion portion may have a regular polygon shape so as to be capable of being inserted into the screwed element having the regular polygon-shaped groove. In other embodiments of the present disclosure, the feature 103 may be configured in the form of a sleeve. The sleeve may receive an end of a threaded element. The inner circumference of the sleeve may be configured to have a shape complementary to the outer circumference of the end of the screwed element so as to be able to rotate the screwed element when the T-wrench is rotated. For example, the inner periphery of the sleeve may be regular polygonal to be able to receive the end of the regular polygonal of the screwed element.

As shown in fig. 1 and 3, the extension bar 200 may be elongated and may have an interior cavity for receiving at least a portion of the transverse bar 101 of a T-wrench. When it is desired to lengthen the length of the transverse rod 101 of the T-wrench, at least a portion of the transverse rod 101 may be inserted into the interior cavity of the extension rod 200. The length of the extension bar 200 is designed to be greater than the length of the at least a portion of the transverse bar 100 to achieve extension of the transverse bar 101. In one embodiment according to the present disclosure, the lumen of extension bar 200 may extend through the entire extension bar. Such an extension bar 200 may be formed directly from a sleeve, thereby simplifying the manufacturing of the extension bar 200. In another embodiment according to the present disclosure, the lumen of extension bar 200 may extend through only a portion of extension bar 200, while the remainder of extension bar 200 may be solid. Such an extension bar 200 may have a higher strength.

The self-locking mechanism 300 is configured to lock the connection between the extension bar 200 and the transverse bar 101 of the T-wrench 100. As shown in fig. 2 and 3, the self-locking mechanism 300 may include an engagement structure 301 disposed near the open end of the interior cavity of the extension bar 200, an elastic mechanism 302 disposed at a predetermined location within the interior cavity of the extension bar 200, and at least one protrusion 303 disposed at a predetermined location of the transverse bar 101 of the T-wrench.

The snap-in structure 301 may include a through slot provided on a side wall of the extension bar and communicating with the interior cavity of the extension bar for receiving a protrusion 303 provided at a predetermined location of the transverse bar 101 of the T-wrench. The through groove may be non-linear in shape as a whole (e.g., curved), and may include an opening into which the protrusion 303 enters, and a closed end against which the elastic mechanism presses the protrusion, as will be described in detail below. In one embodiment according to the present disclosure, as more clearly shown in fig. 5-8, the through slots of the snap structure 301 may include a first through slot 311 extending along a first direction, a second through slot 312 extending substantially downward from the first through slot along an outer circumference of the extension bar, and a third through slot 313 extending from the second through slot along a second direction different from the first direction. The first direction may be a direction from the open end of the interior cavity of the extension bar 200 toward the deep interior cavity of the extension bar 200, and the second direction may be a direction from the deep interior cavity of the extension bar 200 toward the open end of the interior cavity of the extension bar 200. The first through slot 311 of the engagement structure 301 may have an opening 314 to enable the protrusion 303 to extend into the first through slot 311. The third through slot 313 of the snap-in structure 301 may have a closed end. The closed end may form a cavity for receiving a protrusion 303 provided on the transverse rod 101 of the T-wrench.

The resilient mechanism 302 is configured to press the protrusion 303 against the closed end or recess of the third channel 313 of the snap-in structure 301 to lock the connection between the extension bar 200 and the transverse bar 101 of the T-wrench when the transverse bar 101 of the T-wrench is inserted into the interior cavity of the extension bar 200. The elastic mechanism 302 may comprise a spring element 321. In the exemplary embodiment shown in fig. 3 and 4, the spring element 321 is configured as a coil spring. In other embodiments according to the present disclosure, the spring element 321 may be configured as a leaf spring. When the interior cavity of the extension rod 200 extends only through a portion of the extension rod 200, the interior cavity of the extension rod 200 includes a closed end. In this case, the spring element 321 may be placed directly at the closed end of the lumen. The resilient means 302 further comprises a support 322 for supporting a spring element 321 in the interior cavity of the extension rod 200 when the interior cavity of the extension rod 200 extends through the entire extension rod or when the extension rod 200 is made of a sleeve. The support 322 may be formed of a cylinder. The outer circumference of the support 322 may be provided with apertures 323 for receiving fastening elements (e.g., screws, bolts, or pins, etc.). The fastening elements may extend through the wall of the extension bar 200 and into the apertures 323 of the support 322 to secure the support 322 in the lumen of the extension bar 200.

At least one protrusion 303 provided at a predetermined position of the transverse rod 101 of the T-shaped wrench may be integrally formed with the transverse rod 101 of the T-shaped wrench. In other embodiments according to the present disclosure, the protrusion 303 may be formed separately from the transverse rod 101 of the T-wrench. For example, the protrusion 303 may be a screw or bolt screwed into the transverse rod 101 of the T-wrench, or a pin shaft embedded in the transverse rod 101 of the T-wrench. The separately formed protrusions 303 enable an existing T-wrench to be used with the extension bar 200 of the present disclosure after being simply retrofitted, thereby saving manufacturing and retrofitting costs.

Fig. 5 to 8 show the connection process of the extension bar 200 to the transverse bar 101 of the T-shaped panel hand 100. In making the connection, at least a portion of the transverse rod 101 of the T-wrench 100 may first be inserted into the interior cavity of the extension bar 200. In this process, the protrusion 303 provided on the lateral rod 101 is aligned with the opening 314 of the first through slot 311 of the engagement structure 301 provided on the extension rod 200 (as shown in fig. 5), and the protrusion 303 is moved along the first through slot 311 in a subsequent insertion process. During this process, the spring element 321 of the elastic mechanism 302 is gradually compressed and thus accumulates elastic potential energy. Subsequently, when the protrusion 303 moves to the end of the first through groove 311 (as shown in fig. 6), the extension bar 200 is rotated so that the protrusion 303 moves along the second through groove 312 of the engagement structure 301. When the protrusion 303 moves to the end of the second through slot 312 (as shown in fig. 7), the manually applied axial force is slightly removed, so that the spring element 321 of the elastic mechanism 302 releases part of its spring potential energy and pushes and presses the protrusion 303 with its elastic force into the cavity of the third through slot 313. By means of the pressing action of the elastic means 302, the protrusion 303 is firmly held in the cavity of the third channel 313, so that the connection between the extension bar 200 and the transverse bar 101 of the T-wrench is locked. In this way, regardless of the orientation of the extension bar 200, it is not disconnected from the transverse bar 101 of the T-wrench, thereby avoiding injury to the person by the extension bar 200 coming off the T-wrench.

Exemplary embodiments according to the present disclosure are described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various modifications and changes can be made to the exemplary embodiments of the disclosure without departing from the spirit and scope thereof. All changes and modifications are intended to be included within the scope of the present disclosure as defined by the appended claims. The disclosure is defined by the following claims, with equivalents of the claims to be included therein.

Claims (11)

1. A T-wrench assembly, the T-wrench assembly comprising:

a T-wrench including a transverse bar and a vertical bar extending toward one side of the transverse bar in a direction perpendicular to the transverse bar;

an extension bar comprising an interior cavity for receiving at least a portion of a transverse bar of the T-wrench; and

the self-locking mechanism comprises a clamping structure, an elastic mechanism and at least one protruding part, wherein the clamping structure is arranged near the opening end of the inner cavity of the extension rod, the elastic mechanism is arranged at a preset position in the inner cavity of the extension rod, and the protruding part is arranged at a preset position of the transverse rod of the T-shaped wrench;

wherein when the extension bar is connected to the transverse bar of the T-wrench, the elastic mechanism presses the protruding part in the clamping structure so as to lock the connection between the extension bar and the transverse bar of the T-wrench.

2. The T-wrench assembly of claim 1, wherein the snap-in structure comprises a through slot disposed on a side wall of the extension bar and in communication with the interior cavity of the extension bar, the through slot being generally non-linear and comprising an opening into which the protrusion enters and a closed end against which the resilient mechanism abuts.

3. The T-wrench assembly of claim 2, wherein the through slots include a first through slot extending in a first direction, a second through slot extending downwardly from the first through slot along an outer circumference of the extension bar, and a third through slot extending from the second through slot in a second direction different from the first direction, wherein the first direction is a direction from an open end of the inner cavity of the extension bar toward a deep side of the inner cavity of the extension bar, and the second direction is a direction from a deep side of the inner cavity of the extension bar toward an open end of the inner cavity of the extension bar, and wherein the first through slot includes the opening, and the third through slot includes the closed end.

4. The T-wrench assembly of claim 1, wherein the resilient mechanism comprises a spring element.

5. The T-wrench assembly of claim 4, wherein the interior cavity of the extension bar extends through only a portion of the extension bar, wherein the spring element is disposed at the closed end of the interior cavity.

6. The T-wrench assembly of claim 4, wherein the interior cavity of the extension bar extends through the entire extension bar, wherein the resilient mechanism further comprises a support for supporting the spring element within the interior cavity, and wherein the support is secured within the interior cavity to support the spring element.

7. The T-wrench assembly of claim 6, wherein the outer periphery of the support is provided with apertures for receiving fastening elements that extend through the wall of the extension bar and into the apertures of the support to secure the support in the interior cavity of the extension bar.

8. A T-wrench assembly according to any one of claims 4 to 7, wherein the spring element is a coil spring or a leaf spring.

9. The T-wrench assembly of any one of claims 1-7, wherein the tab is integrally formed with a transverse bar of the T-wrench.

10. The T-wrench assembly of any one of claims 1-7, wherein the protrusion is a screw or bolt threaded into a transverse bar of the T-wrench or a pin embedded in a transverse bar of the T-wrench.

11. The T-wrench assembly of any one of claims 1-7, wherein the free end of the vertical rod of the T-wrench includes a feature that mates with an end of a threaded element to thread the threaded element, the feature configured to be inserted into a recess provided in the end of the threaded element or a sleeve configured to receive the end of the threaded element.