Spanner head quick change structure

Abstract

The utility model discloses a wrench head quick change structure, including torsion bar, twist head and the plug piece of fixed setting in one end of torsion bar. The inside slide of plug piece is installed with lock tongue, and the both sides of lock tongue are equipped with the slide pin of the arrangement of the penetration plug piece, and one side of lock tongue is fixedly connected with spring. One end of twist head is fixedly connected with the sleeve head, and the inside of sleeve head is equipped with sleeve hole, and the inner wall of sleeve hole is equipped with guide groove and lock groove. The sliding head is slidably installed on the outer surface of sleeve head, is used for with slide pin and is combined to drive lock tongue to slide, thereby realizes the quick assembly and disassembly of twist head. When the plug piece is inserted into sleeve hole, lock tongue is automatically retracted under the arc inclined plane direction and is clamped into lock groove under the action of spring, and the locking is completed, and when the sliding head is pushed, lock tongue is retracted and is separated from lock groove, and the quick disassembly of twist head is realized. The utility model discloses simple structure, and the assembly and disassembly are quick, and the locking is reliable, and the wrench head replacement efficiency and operation convenience have been improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of wrench technology, specifically to a quick-change wrench head structure. Background Technology

[0002] Currently, wrenches, as a common tightening or loosening tool, are widely used in mechanical repair, assembly manufacturing, and vehicle maintenance. Traditional wrenches generally adopt an integral structure, meaning the torsion bar and wrench head are molded as one piece. When it is necessary to change to a different size or shape of wrench head, the entire wrench set usually needs to be replaced, which not only increases the number of tools and carrying burden but also leads to low efficiency. In some improved structures, the wrench head and torsion bar are connected by a plug-in or threaded connection, which achieves a detachable design, but there are problems such as cumbersome assembly and disassembly steps, low positioning accuracy, and insufficient connection strength.

[0003] For example, while existing threaded wrench heads can be replaced, frequent installation and removal can easily lead to thread wear or stripping, affecting their service life. Pin-type connections rely on the elastic deformation of a metal pin for locking, but their structure is complex, requires auxiliary tools for installation and removal, and poses a risk of loosening under high load torque. Furthermore, while some quick-change mechanisms incorporate elastic locking or pin mechanisms, they still require both hands to operate, making them inconvenient to use in confined or restricted spaces.

[0004] In summary, existing wrench head connection structures generally suffer from problems such as inconvenient installation and removal, inaccurate positioning, short service life, and complex structure, making it difficult to achieve a balance between quick replacement and stable tightening. Therefore, there is an urgent need to provide a quick-change wrench head structure that is simple in structure, easy to operate, and provides reliable tightening to solve the above-mentioned technical problems and improve the practicality and work efficiency of wrench tools. Utility Model Content

[0005] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted by this utility model is as follows: a quick-change wrench head structure, including a torsion bar, a torsion head, and a plug fixedly disposed at one end of the torsion bar. A locking tongue is slidably installed on the inner side of the plug, and sliding pins are provided on both sides of the locking tongue, passing through the plug. A spring is fixedly connected to one side of the locking tongue. A sleeve is fixedly connected to one end of the torsion head, and a sleeve hole is opened on the inner side of the sleeve hole, with a guide groove and a locking groove inside the sleeve hole. A sliding push head is slidably installed on the outer surface of the sleeve, used to engage with the sliding pins to drive its sliding. Through the coordinated action of the locking tongue, sliding pins, guide groove, and locking groove, automatic locking and unlocking between the plug and the sleeve are achieved, enabling quick replacement of the wrench head.

[0007] In a preferred embodiment, the latch is arranged on both sides of the plug and can slide perpendicularly relative to the plug. A through-hole groove is formed on the surface of the latch to guide the sliding of the spring. One end of the spring is fixedly connected to the inside of the plug, and the other end abuts against the latch, thereby providing elastic energy storage when the latch is compressed and retracting, and releasing the elastic force to automatically extend the latch when released.

[0008] Specifically, the above structural design enables the locking tongue to automatically reset and limit itself during the insertion of the locking head, avoiding manual adjustment or external force assistance, and improving the automation and reliability of the structure.

[0009] In a preferred embodiment, one side of the latch has a rounded bevel structure. When the plug is inserted into the sleeve hole, the latch automatically retracts due to the bevel of the inner wall of the sleeve hole, compressing the spring to store energy. As the insertion force continues, the latch automatically aligns with the lock groove position under the guidance of the guide groove, and the spring releases its elastic force to make the latch spring into the lock groove to achieve locking.

[0010] Specifically, the design achieves automatic centering and stepless locking through the guiding effect of the arc-shaped inclined surface, simplifying the connection steps and improving the smoothness and stability of assembly.

[0011] In a preferred example, the diameter of the sleeve hole is adapted to the external dimensions of the plug, and the position of the locking groove corresponds to the position of the locking tongue. This precise fit ensures a stable engagement between the plug and the toggle head after insertion.

[0012] Specifically, the mating structure achieves high-precision locking through geometric alignment, giving the insertion and removal process a good sense of limit and repeatability, thereby preventing loosening during torque transmission.

[0013] In a preferred example, the width of the lock groove gradually decreases from its port towards the sliding pusher, and one side wall is arranged obliquely. When the operator pushes the sliding pusher, the sliding pin slides along the guide groove, causing the latch spring to compress, thus retracting the latch vertically out of the lock groove.

[0014] Specifically, the guide chute structure forms a smooth detachment trajectory during loading and unloading, effectively preventing jamming and ensuring smooth and reliable head-turning and replacement operations.

[0015] In a preferred embodiment, the sliding pusher is used to push the sliding pin and locking tongue to slide along the plug direction, thereby compressing the spring to achieve a retraction action and thus releasing the locking state. The sliding pusher can be manually pushed to complete the loading and unloading conversion within a short stroke.

[0016] Specifically, the structure allows for one-handed operation via manual sliding, enabling the twisting and disassembly of parts in confined spaces, significantly improving ease of operation and practical applicability.

[0017] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, by setting a plug at the end of the torsion bar and a sleeve at the end of the torsion head, the plug can be automatically locked and quickly disengaged in the sleeve by the coordinated cooperation of the locking tongue, sliding pin and spring, thereby completing the quick installation and removal of the wrench head, avoiding the cumbersome operation of replacing the head of the traditional wrench with the help of tools or screwing structure, and greatly improving the replacement efficiency and ease of use.

[0018] 2. In this utility model, by setting a locking tongue with an arc-shaped bevel and a sleeve hole with a guide groove and a locking groove, automatic guiding, limiting and resetting functions are realized; combined with the manual drive structure of the sliding push head, locking and unlocking can be completed with one hand, ensuring stable engagement and reliable positioning of the wrench head during use, and effectively improving the safety and durability of the structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of a toggle head structure according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the torsion bar and plug structure according to one embodiment of the present invention; Figure 4 This is a schematic diagram of the cross-sectional structure of a torsion head according to an embodiment of the present invention.

[0020] Figure label: 100. Torsion bar; 110. Plug fitting; 120. Locking tongue; 121. Sliding pin; 122. Spring; 200. Twist head; 210. Sleeve head; 211. Insertion hole; 212. Guide groove; 213. Locking groove; 300. Sliding pusher head. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0022] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0023] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a quick-change wrench head structure.

[0024] Combination Figures 1-4As shown, this utility model provides a quick-change wrench head structure, including components such as a torsion bar 100, a torsion head 200, a plug 110, a locking tongue 120, a sliding pin 121, a spring 122, a socket 210, a socket hole 211, a guide groove 212, a locking groove 213, and a sliding push head 300. One end of the torsion bar 100 is fixedly mounted with the plug 110, and one end of the torsion head 200 is fixedly mounted with the socket 210. The torsion bar 100 and the torsion head 200 are detachably connected via the plug 110 and the socket 210. The sliding push head 300 is slidably mounted on the outer surface of the socket 210 and is used to control the movement of the internal sliding pin 121 and the locking tongue 120, enabling quick loading and unloading of the wrench head.

[0025] In this embodiment, the plug 110 is disposed at one end of the torsion bar 100, and has an axially oriented groove structure inside for slidingly mounting the locking tongue 120. The locking tongue 120 has sliding pins 121 penetrating the plug 110 on both sides, and the sliding pins 121 are symmetrically arranged on both sides of the plug 110. One end of the locking tongue 120 is fixedly connected to the inside of the plug 110 by a spring 122 to provide an elastic ejection force.

[0026] One end of the twist head 200 is fixedly connected to the sleeve head 210, and the inner side of the sleeve head 210 forms a sleeve hole 211. A guide groove 212 and a locking groove 213 are provided on the inner wall of the sleeve hole 211, and the two are distributed along the insertion and removal direction.

[0027] The sliding pusher 300 is fitted onto the outer surface of the sleeve 210 and can slide axially. When pushed, it engages with the sliding pin 121, causing the sliding pin 121 to move along the guide groove 212. The locking groove 213 in the sleeve hole 211 is used to accommodate the locking tongue 120 to extend into the engagement, thereby achieving a reliable lock between the plug 110 and the sleeve 210.

[0028] In this embodiment, the locking tongue 120 is arranged on both sides of the plug 110 and can slide in a direction perpendicular to the axis of the plug 110. The surface of the locking tongue 120 is provided with a through-hole groove structure for guiding the spring 122 to move axially. One end of the spring 122 is fixed to the inner wall of the hole in the plug 110, and the other end contacts the locking tongue 120, providing a continuous elastic ejection force.

[0029] With the above arrangement, when the latch 120 is compressed and retracted, the spring 122 is compressed and stores energy; when the sliding pin 121 releases the force, the spring 122 can automatically reset and push the latch 120 outward, ensuring that the structure automatically resets.

[0030] In this embodiment, such as Figure 4As shown, one side of the locking tongue 120 is designed with a rounded bevel. When the plug 110 is inserted into the sleeve hole 211, the rounded bevel of the locking tongue 120 is gradually retracted into the plug 110 by the pressure of the inner wall of the sleeve hole, and the compression spring 122 stores energy. As the insertion depth increases, the locking tongue 120 gradually aligns with the locking groove 213 under the guidance of the guide groove 212. When the positions match, the spring 122 releases its elastic force, causing the locking tongue 120 to automatically extend and engage in the locking groove 213, achieving automatic engagement and locking.

[0031] In this embodiment, the diameter of the sleeve hole 211 matches the outer dimensions of the plug 110 to achieve a sliding fit. The locking groove 213 is precisely arranged inside the sleeve hole 211, corresponding to the position of the locking tongue 120 on the plug 110, thereby achieving precise alignment and stable locking during insertion.

[0032] Through the above-mentioned design of size and position, the torsion bar 100 and the torsion head 200 can achieve accurate positioning and reliable engagement during rapid assembly, avoiding shaking or falling off.

[0033] In this embodiment, the width of the locking groove 213 gradually decreases from the port of the sleeve hole 211 toward the sliding push head 300, and one side wall is arranged at an angle to guide the sliding pin 121 and the locking tongue 120 to retract in the vertical direction during the pull-out operation.

[0034] When the operator pushes the sliding pusher head 300, the sliding pin 121 slides in the guide groove 212 along the inclined direction, causing the locking tongue 120 to retract inward and compress the spring 122, achieving a smooth disengagement action and ensuring that the wrench head can be disassembled smoothly without jamming.

[0035] In this embodiment, the sliding push head 300 slides against the outer surface of the socket head 210 and can move axially. When the sliding push head 300 is pushed, its inner wall contacts the sliding pin 121 and moves together, causing the locking tongue 120 to compress the spring 122 into the plug part 110, so that the locking tongue 120 disengages from the locking groove 213, thereby completing the unlocking and separation of the wrench head 200 and realizing the quick replacement of the wrench head.

[0036] Working principle and usage process of this utility model: The end of the torsion bar 100 is fixed with a plug 110, and the end of the torsion head 200 is provided with a sleeve 210. The two are quickly installed and removed through the locking tongue 120, the sliding pin 121 and the sliding push head 300.

[0037] When the plug 110 is inserted into the sleeve hole 211 of the twist head 200, the locking tongues 120 on both sides of the plug 110 are automatically retracted by being squeezed by the inner wall of the sleeve hole under the action of the arc slope, and the compression spring 122 enters the interior of the plug 110. As the insertion force continues, the locking tongues 120 gradually align with the locking groove 213 under the guidance of the guide groove 212.

[0038] When the sliding pin 121 is in contact with the surface of the sliding push head 300, the spring 122 releases its elastic potential energy, pushing the locking tongue 120 outward to engage with the locking groove 213, thus achieving reliable engagement and locking between the plug and the twist head.

[0039] When disassembly is required, the operator pushes the sliding push head 300, the sliding pin 121 moves linearly, causing the locking tongue 120 to compress the spring 122 and retract inward to disengage from the locking groove 213. At the same time, the separation torsion bar 100 and the torsion head 200 are pulled out, and the plug part 110 can be pulled out smoothly, realizing the quick replacement of the torsion head 200.

[0040] The overall structure, through guide grooves, spring return, and knob rotation, achieves automatic locking, one-handed unlocking, and high-precision alignment, ensuring the speed, reliability, and operational stability of wrench head assembly and disassembly. In this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0041] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A quick-change wrench head structure, characterized in that, include: Torsion bar (100), torsion head (200), sliding push head (300) and plug (110) fixedly disposed at one end of the torsion bar (100); A locking tongue (120) is slidably mounted on the inner side of the plug (110), and sliding pins (121) are provided on both sides of the locking tongue (120) through the plug (110); a spring (122) is fixedly connected to one side of the locking tongue (120); a sleeve (210) is fixedly connected to one end of the twist head (200), and a sleeve hole (211) is opened on the inner side of the sleeve hole (211), and a guide groove (212) and a locking groove (213) are opened on the inner side of the sleeve hole (211). The sliding push head (300) is slidably mounted on the outer surface of the sleeve head (210); the sliding push head (300) is used to engage with the guide pin (121) and drive the guide pin (121) to slide; the inner side of the sleeve hole (211) is provided with a lock groove (213) for accommodating the insertion and engagement of the lock tongue (120), and the guide groove (212) has an oblique groove structure. When the sliding pin (121) engages with the sliding push head (300), the lock tongue (120) enters the inner side of the corresponding lock groove (213) to complete the engagement and fixation.

2. The quick-change wrench head structure according to claim 1, characterized in that, The locking tongue (120) is arranged on both sides of the plug (110) and can slide vertically relative to both sides of the plug (110); the surface of the locking tongue (120) is provided with a through hole groove for guiding the sliding of the spring (122), and the spring (122) is used to provide an elastic push-out force on the locking tongue (120).

3. The quick-change wrench head structure according to claim 1, characterized in that, One side of the locking tongue (120) has an arc-shaped bevel structure, which is used to automatically retract and compress the spring (122) into the interior of the plug (110) during the connection and engagement with the twist head (200), so as to achieve automatic reset and locking.

4. The quick-change wrench head structure according to claim 1, characterized in that, The inner diameter of the sleeve hole (211) is adapted to the outer dimensions of the plug (110), and the position of the locking groove (213) matches the position of the locking tongue (120) on the surface of the plug (110) to achieve precise alignment, insertion and locking.

5. The quick-change wrench head structure according to claim 1, characterized in that, The width of the locking groove (213) gradually decreases from its port to the sliding push head (300), and one side wall is arranged obliquely to guide the sliding pin (121) and the locking tongue (120) to automatically retract in a direction perpendicular to the side wall of the plug (110), thereby achieving smooth engagement and disengagement.

6. The quick-change wrench head structure according to claim 1, characterized in that, The sliding push head (300) is used to push the guide pin (121) and the locking tongue (120) to compress the spring (122) during the pushing and sliding action, thereby completing the quick assembly, disassembly and locking of the twist head (200).

Images