A sliding core structure for a torque wrench

Abstract

The utility model discloses a kind of sliding core structures for torque wrench, it is related to torque wrench technical field, the structure includes sliding core and sliding core shell, two arc-shaped guide rail ribs are equipped in the sliding core shell inner wall and the concave arc-shaped guide rail groove is equipped in the both sides of sliding core, by the mutual cooperation between the arc-shaped guide rail rib and the concave arc-shaped guide rail groove, stable sliding is realized, when working, main spring compression trigger slider is inclined on sliding core, drive ratchet head knock steel pipe inner wall, realize torque prompt, the number of parts of the traditional sliding core is simplified in this structure, stability and production efficiency are improved, suitable for the torque trigger component of various torque wrench.

Description

Technical Field

[0001] This utility model relates to the field of torque wrench technology, specifically to a sliding core structure for torque wrenches, which is particularly suitable for wrench components with preset torque trigger indication. Background Technology

[0002] Traditional torque wrenches have several drawbacks in their sliding core structure: First, the complex design relies on multiple auxiliary components such as steel balls and a top plate, resulting in a large number of parts. This not only increases the complexity of the assembly process but also reduces production efficiency and increases manufacturing costs. Second, the steel ball-to-other-component contact method is prone to wear and deformation after long-term use, leading to increased clearance and affecting the stability of torque triggering. This results in decreased torque control accuracy and an inability to meet the demands of high-precision operations. Third, the linkage between the sliding core and the ratchet head is unreliable. When the torque reaches the preset value, the trigger feedback is not sensitive, and the indication is unclear, which can easily lead to operator misjudgment and affect the quality of work. This invention proposes a sliding core structure for torque wrenches to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a torque wrench sliding core structure with a simple structure, few parts, and strong fit stability, so as to achieve accurate and sensitive torque triggering indication, while simplifying the assembly process and improving production efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a sliding core structure for a torque wrench, comprising a sliding core and a sliding core shell, wherein the sliding core shell is a cylindrical structure, the sliding core is a cylindrical iron core, the bottom of the sliding core shell is provided with a circular hole, the center of the sliding core is provided with a circular through hole, the upper end of the sliding core is provided with a rectangular groove, the two sides of the rectangular groove are beveled planes, the sliding core and the sliding core shell are slidably engaged, and are used to link with the main spring and ratchet head of the torque wrench to realize torque trigger indication.

[0005] A further improvement of this utility model is that the wall thickness of the sliding core shell is 1.0 mm. This thickness design effectively reduces the overall weight of the component while ensuring structural strength.

[0006] A further improvement of this utility model is that: the inner wall of the sliding core shell is provided with two arc-shaped guide rails, and the arc-shaped structure design can reduce the frictional resistance during the sliding process.

[0007] A further improvement of this utility model is that: the sliding core is provided with concave arc-shaped guide rail grooves on both sides, and the concave arc-shaped structure and the convex arc-shaped structure of the guide rail rib have a high degree of fit, which can increase the contact area.

[0008] A further improvement of this utility model is that: the bottom of the sliding core is provided with a clearance groove, which is a circular structure. The clearance groove is provided to save materials, and the circular through hole in the middle is to prevent the small square from adhering to the sliding core.

[0009] A further improvement of this utility model is that the guide groove of the sliding core is adapted to the guide rib of the sliding core shell to achieve a sliding fit. The sliding trajectory of the sliding core is limited by the precise adaptation of the guide rib and the guide groove.

[0010] A further improvement of this utility model is that the angle between the oblique plane and the horizontal plane is 45°. The 45° oblique angle design can optimize the contact force between the slide core and the ratchet head. When the torque reaches the preset value, the force between the ratchet head and the oblique plane can be quickly converted into the axial thrust of the slide core.

[0011] 1. Simplified structure and improved production efficiency: This utility model only includes two core components, the sliding core and the sliding core shell, eliminating auxiliary parts such as steel balls and top plates in traditional structures. The number of parts is greatly reduced, which not only simplifies the assembly process and reduces the assembly difficulty, but also improves production efficiency and reduces manufacturing costs. At the same time, the structural design of the sliding core shell and the sliding core is simple, which is convenient for mass production.

[0012] 2. Stable fit and improved torque control accuracy: The arc-shaped guide ribs on the inner wall of the sliding core shell are precisely matched with the concave arc-shaped guide grooves on both sides of the sliding core to form a stable sliding fit structure. This avoids the wear problem of traditional steel ball contact method. The fit clearance is stable, and there is no deviation or jamming during the sliding process, ensuring the consistency of torque triggering. In addition, the mutual cooperation of the two arc-shaped structures increases the contact area, reduces local wear, extends the service life of the components, and further ensures the torque control accuracy after long-term use.

[0013] 3. Sensitive triggering and clear feedback: The 45° angled planes on both sides of the rectangular groove at the upper end of the slide core allow the contact force between the ratchet head and the slide core to be quickly converted into axial thrust. When the torque reaches the preset value, the slide core can quickly slide along the guide rail and generate obvious feedback in conjunction with the main spring. The triggering feedback is sensitive and clear, effectively avoiding operator misjudgment and improving work quality. At the same time, the clearance groove at the bottom of the slide core provides sufficient space for sliding, further ensuring the smoothness of the triggering action.

[0014] 4. High adaptability and practicality: The 1.0MM wall thickness design of the sliding core shell, the cylindrical structure of the sliding core and the sliding core shell, and the setting of the central circular hole and circular through hole are all conducive to precise matching with the main spring, ratchet head and other internal components of the torque wrench. The installation is convenient and it can be widely used in various preset torque type torque wrenches, with a wide range of applications. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of this utility model; Figure 3 This is a schematic diagram of the assembly structure of the sliding core and the sliding core shell of this utility model; Figure 4 This is a schematic diagram of the sliding core structure of this utility model; Figure 5 This is a schematic diagram of the sliding core shell structure of this utility model; Figure descriptions: 1-Sliding core, 2-Sliding core shell, 3-Round hole, 4-Round through hole, 5-Rectangular groove, 6-Angled plane, 7-Main spring, 8-Ratchet head, 9-Arc-shaped guide rail rib, 10-Concave arc-shaped guide rail groove, 11-Clearing groove, 12-Wrench lever, 13-Small square, 14-Inner wall of wrench steel pipe. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0017] The purpose of this utility model, as provided in this embodiment, is to address the technical problems existing in the prior art and provide... A sliding core structure for a torque wrench includes a sliding core 1 and a sliding core shell 2. The sliding core shell 2 is a cylindrical structure, and the sliding core 1 is a cylindrical iron core. The bottom of the sliding core shell 2 has a circular hole 3, and the center of the sliding core 1 has a circular through hole 4. The upper end of the sliding core 1 has a rectangular groove 5, and the two sides of the rectangular groove 5 are beveled planes 6. The sliding core 1 and the sliding core shell 2 are slidably engaged and used to link with the main spring 7 and ratchet head 8 of the torque wrench to realize torque triggering indication. The wall thickness of the sliding core shell 2 is 1.0 mm. This thickness design effectively reduces the overall weight of the component while ensuring structural strength, and facilitates the adaptation and installation with other internal components of the torque wrench. The inner wall of the sliding core shell 2 has two arc-shaped guide rails 9. The arc structure design can reduce the frictional resistance during the sliding process. At the same time, the two arc-shaped guide rails 9 are symmetrically distributed to ensure the force is balanced when the sliding core 1 slides, thereby improving the sliding stability. The slide core 1 has concave arc-shaped guide rail grooves 10 on both sides. The concave arc structure fits well with the convex arc structure of the arc-shaped guide rail rib 9, which can increase the contact area, reduce local wear, and extend the service life. The bottom of the slide core 1 has a clearance groove 11. The clearance groove 11 is a circular structure. The clearance groove 11 can prevent the bottom of the slide core 1 from interfering with other components, reserve sufficient space for the sliding of the slide core 1, reduce the weight of the slide core 1, and improve the sliding flexibility. The concave arc-shaped guide rail groove 10 of the slide core 1 is adapted to the arc-shaped guide rail rib 9 of the slide core shell 2 to achieve sliding cooperation. Through the precise adaptation of the arc-shaped guide rail rib 9 and the concave arc-shaped guide rail groove 10, the sliding trajectory of the slide core 1 is limited, avoiding deviation and jamming during sliding, ensuring that the slide core 1 slides stably along the axial direction, and improving the reliability of the linkage cooperation. The angle between the oblique plane 6 and the horizontal plane is 45°. The 45° oblique angle design can optimize the contact force between the slide core 1 and the ratchet head 8. When the torque reaches the preset value, the force between the ratchet head 8 and the oblique plane 6 can be quickly converted into the axial thrust of the slide core 1, so that the slide core 1 slides precisely along the guide rail, triggering the main spring 7 to generate feedback and improving the trigger sensitivity.

[0018] 1. Torque transmission stage: When the torque wrench tightens the bolt, the torque is transmitted to the sliding core 1 through the wrench lever 12. Through the mutual cooperation between the arc-shaped guide rail rib 9 and the concave arc-shaped guide rail groove 10, the main spring 7 is in the initial state. 2. Spring compression stage: As the bolt tightening force increases, the bolt reaction force causes the main spring 7 to deform and compress, and the sliding core 1 simultaneously squeezes the small square 13 (torque transmission component) and the ratchet head 8; 3. Torque triggering stage: When the compression of the main spring 7 reaches the threshold corresponding to the preset torque, the small square 13 and the sliding core 1 tilt relative to each other, causing the tail arm of the ratchet head 8 to strike the inner wall 14 of the wrench steel pipe, producing a crisp sound and vibration, indicating that the torque has reached the target. 4. Reset phase: After the force is stopped, the main spring 7 returns to its original state, and the sliding core 1, the small square 13, and the ratchet head 8 return to their initial positions, waiting for the next use.

[0019] The above are merely preferred embodiments of this utility model, but do not limit the patent scope of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model's specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A sliding core structure for a torque wrench, characterized in that: The device includes a sliding core and a sliding core shell. The sliding core shell is a cylindrical structure, and the sliding core is a cylindrical core structure. The bottom of the sliding core shell has a circular hole, and the center of the sliding core has a circular through hole. The upper end of the sliding core has a rectangular groove with beveled planes on both sides. The sliding core and the sliding core shell slide together and are used to link with the main spring and ratchet head of the torque wrench to achieve torque triggering indication.

2. The sliding core structure for a torque wrench according to claim 1, characterized in that: The wall thickness of the sliding core shell is 1.0 mm.

3. The sliding core structure for a torque wrench according to claim 1, characterized in that: The inner wall of the sliding core shell is provided with two arc-shaped guide rails.

4. The sliding core structure for a torque wrench according to claim 1, characterized in that: The slide core is provided with concave arc-shaped guide rail grooves on both sides.

5. The sliding core structure for a torque wrench according to claim 4, characterized in that: The bottom of the sliding core is provided with a clearance groove, which is a circular structure.

6. The sliding core structure for a torque wrench according to claim 1, characterized in that: The guide groove of the sliding core is adapted to the guide rib of the sliding core shell to achieve a sliding fit.

7. The sliding core structure for a torque wrench according to claim 1, characterized in that: The angle between the oblique plane and the horizontal plane is 45°.

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