Anti-scald screwdriver bit

Abstract

The utility model discloses an anti-scald screwdriver bit, which belongs to the technical field of screwdriver bits and comprises a screwdriver bit main body, the screwdriver bit main body is composed of a clamping part, a connecting part and a working part, and the outer surface of the connecting part is fixedly sleeved with a fixing ring; the movable ring is fixedly clamped to the fixed ring through cooperation of the locking unit and the clamping groove so that the movable ring and the fixed ring can form a whole, namely, the temperature sensing ring can be limited and clamped between the fixed ring and the movable ring, and installation of the temperature sensing ring is achieved; the temperature of the screwdriver head body can be transmitted to the temperature sensing ring through the heat conduction characteristic of metal, the reversible thermochromic material is arranged in the temperature sensing ring, when the temperature exceeds a set threshold value, color change is triggered, the color change has reversibility, it is ensured that the screwdriver head is still effective after multiple high-temperature cycles, and the service life of the screwdriver head is prolonged. In other words, the screwdriver head body can remind a worker that the temperature of the screwdriver head body is high at the moment through the color change of the temperature sensing ring, touch is not needed, and use safety is guaranteed.

Description

Technical Field

[0001] This application relates to the field of bit technology, and more particularly to a heat-resistant bit. Background Technology

[0002] Screwdriver bits, as the core working component of power tools, are widely used in mechanical assembly, electronic equipment repair, home renovation, and other fields. Their core function is to transmit torque through engagement with screw heads. With the increasing precision requirements of industrial manufacturing and the enhancement of power tool performance, the market has placed higher demands on the wear resistance, torsional strength, and compatibility stability of screwdriver bits.

[0003] In high-frequency use or high-temperature environments, the temperature of the bit will rise due to frictional heat generation and the plastic deformation energy generated by the slippage of the internal lattice of the metal when the bit is subjected to alternating torque. Some of this energy is released as heat. If the user is unaware of how high the bit is and directly removes or replaces the bit by hand, it can easily cause burns to the user's hands, seriously affecting the safety of use. Therefore, an improvement has been made to an anti-scalding bit. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a heat-resistant screwdriver bit that overcomes these deficiencies. It aims to solve the problem that traditional screwdriver bits can overheat due to various factors during use, and users are unaware of the bit's temperature. Directly removing or replacing the bit by hand can easily cause burns, severely impacting user safety.

[0005] To achieve the above objectives, this application provides the following technical solution: a scalding-resistant bit, comprising a bit body, the bit body being composed of a clamping part, a connecting part, and a working part, a fixing ring being fixedly sleeved on the outer surface of the connecting part, a temperature sensing ring and a moving ring being slidably sleeved on the outer surface of the connecting part on one side of the fixing ring, the inner wall of the temperature sensing ring being in contact with the outer wall of the connecting part, the interior of the temperature sensing ring being filled with a reversible thermochromic material, an adjustment groove being provided on the outer wall of the moving ring, a guide rod being fixedly connected inside the adjustment groove, a locking unit being slidably sleeved on the outer surface of the guide rod, and a snap-fit ​​groove being provided on the side of the fixing ring away from the moving ring for the locking unit to snap into.

[0006] By adopting the above technical solution, the movable ring is fixedly attached to the fixed ring through the cooperation between the locking unit and the snap-fit ​​groove, so that the two can form a whole. The temperature sensing ring can be limited and clamped between the fixed ring and the movable ring, thus realizing the installation of the temperature sensing ring. Because the temperature sensing ring is tightly fitted to the connecting part, the temperature of the bit body can be transferred to the temperature sensing ring through the thermal conductivity of metal. Since the temperature sensing ring has a built-in reversible thermochromic material, it will trigger a color change when the temperature exceeds the set threshold. Moreover, the color change is reversible, ensuring that it remains effective after multiple high-temperature cycles. That is, the bit body can remind the operator that the bit body is hot and should not be touched by the color change of the temperature sensing ring, thus ensuring the safety of use.

[0007] As a preferred technical solution of this application, the locking unit includes a sliding block and a spring that are slidably sleeved on the outer surface of the guide rod. The sliding block is fixedly connected to the adjusting groove through the spring. A connecting seat is fixedly installed on the outer side of the sliding block. A rotating rod is rotatably connected inside the connecting seat. A barb is provided at the end of the rotating rod. The barb is slidably inserted into the snap-fit ​​groove.

[0008] By adopting the above technical solution, the sliding block is moved towards the fixed ring by pulling the rotating rod. During the movement, the sliding block compresses the spring and stores elastic potential energy. When the rotating rod is pulled to the specified stroke, it is rotated to make it parallel to the fixed ring. At this time, the rotating rod is released, and the compressed spring begins to release energy, pushing the sliding block back to its original position and driving the rotating rod to move synchronously. The barb is precisely inserted into the locking groove under the action of the rotating rod to complete the mechanical engagement and ensure that the barb is in continuous contact with the locking groove, avoiding accidental unlocking caused by high-frequency vibration. That is, the moving ring and the fixed ring are fixedly assembled together by the cooperation between the locking unit and the locking groove.

[0009] As a preferred technical solution of this application, the width of the sliding block is the same as the width of the adjusting groove, and the external dimensions of the barb are adapted to the internal space dimensions of the snap-fit ​​groove.

[0010] By adopting the above technical solution, the movement trajectory of the sliding block is limited to ensure that the sliding block will not deflect when it moves along the guide rod, thus ensuring the accuracy and stability of the movement. The barb and the locking groove are matched to ensure that the two can fit tightly together to achieve precise locking.

[0011] As a preferred technical solution of this application, the number of the adjustment groove, guide rod, locking unit and snap-fit ​​groove are all four and correspond one to one. The four adjustment grooves, guide rods, locking units and snap-fit ​​grooves are evenly distributed in a circular array about the central axis of the connection part.

[0012] By adopting the above technical solution, the four sets of locking units form a circumferential equidistant force system, ensuring that the moving ring and the fixed ring can be firmly locked together.

[0013] As a preferred technical solution of this application, the moving ring has an installation groove on the side near the working part, and a magnet is embedded in the installation groove.

[0014] By adopting the above technical solution, and by setting a magnet to enhance the magnetism of the bit body, the working part of the bit body can strongly attract screws, making it convenient to tighten screws.

[0015] As a preferred technical solution of this application, the clamping part, the connecting part and the working part are integrally formed, and the outer surface of the clamping part is provided with a steel ball limiting groove.

[0016] By adopting the above technical solution, the stress concentration points that may be generated by traditional welding are eliminated through the integral molding process, making the load transfer between components more uniform and effectively resisting torsional loads and shear stresses during clamping operations. The steel ball limiting groove is mainly to prevent the bit body from falling off during use. The steel ball limiting groove cooperates with the locking steel ball in the installation tool to limit the rotation of the bit body and ensure that the bit body will not fall off accidentally.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. In this utility model, the movable ring is fixedly attached to the fixed ring by the cooperation between the locking unit and the snap-fit ​​groove, so that the two can form a whole. This allows the temperature sensing ring to be limited and clamped between the fixed ring and the movable ring, thus realizing the installation of the temperature sensing ring. Because the temperature sensing ring is tightly fitted to the connecting part, the temperature of the bit body can be transferred to the temperature sensing ring through the thermal conductivity of the metal. Since the temperature sensing ring has a built-in reversible thermochromic material, it will trigger a color change when the temperature exceeds a set threshold. Moreover, this color change is reversible, ensuring that it remains effective after multiple high-temperature cycles. In other words, the bit body can remind the operator that the bit body is hot and should not be touched by the color change of the temperature sensing ring, ensuring safe use.

[0019] 2. In this utility model, by pulling the rotating rod, the sliding block is moved towards the fixed ring. During the movement, the sliding block compresses the spring and stores elastic potential energy. When the rotating rod is pulled to the specified stroke, it is rotated to make it parallel to the fixed ring. At this time, the rotating rod is released, and the compressed spring begins to release energy, pushing the sliding block back to its original position and driving the rotating rod to move synchronously. The barb is precisely inserted into the locking groove under the action of the rotating rod to complete the mechanical engagement and ensure that the barb and the locking groove are in continuous contact, avoiding accidental unlocking caused by high-frequency vibration. That is, the moving ring and the fixed ring are fixedly assembled together by the cooperation between the locking unit and the locking groove.

[0020] With reference to the following description and accompanying drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereto. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of this application;

[0023] Figure 2 This is a frontal sectional view of the structure of this application;

[0024] Figure 3 This is a partial structural diagram of this application;

[0025] Figure 4 This is a schematic diagram of the moving ring structure of this application;

[0026] Figure 5 This is a schematic diagram of the composition of the locking unit of this application.

[0027] In the diagram: 1. Clamping part; 2. Connecting part; 3. Working part; 4. Fixing ring; 5. Temperature sensing ring; 6. Moving ring; 7. Adjusting groove; 8. Guide rod; 9. Locking unit; 91. Sliding block; 92. Spring; 93. Connecting seat; 94. Rotating rod; 95. Barb; 10. Snap-fit ​​groove; 11. Mounting groove; 12. Magnet; 13. Steel ball limiting groove. Detailed Implementation

[0028] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0029] like Figure 1 - Figure 5As shown, this embodiment provides an anti-scalding bit, including a bit body, which consists of a clamping part 1, a connecting part 2, and a working part 3. A fixing ring 4 is fixedly sleeved on the outer surface of the connecting part 2. A temperature sensing ring 5 and a moving ring 6 are slidably sleeved on the outer surface of the connecting part 2 on one side of the fixing ring 4. The inner wall of the temperature sensing ring 5 is in contact with the outer wall of the connecting part 2. The interior of the temperature sensing ring 5 is filled with a reversible thermochromic material. An adjustment groove 7 is provided on the outer wall of the moving ring 6. A guide rod 8 is fixedly connected inside the adjustment groove 7. A locking unit 9 is slidably sleeved on the outer surface of the guide rod 8. A snap-fit ​​groove 10 is provided on the side of the fixing ring 4 away from the moving ring 6 for the locking unit 9 to be snapped into. In use, the moving ring 6 is secured by the cooperation between the locking unit 9 and the snap-fit ​​groove 10. The fixing clip is attached to the fixing ring 4 so that the two can be integrated into one unit. This allows the temperature sensing ring 5 to be clamped between the fixing ring 4 and the moving ring 6, thus enabling the installation of the temperature sensing ring 5. The temperature of the bit body is transferred to the temperature sensing ring 5 through the thermal conductivity of the metal. Since the temperature sensing ring 5 has a built-in reversible thermochromic material, it will trigger a color change when the temperature exceeds a set threshold. In other words, the bit body can remind the operator that the bit body is too hot and should not be touched by the color change of the temperature sensing ring 5, ensuring safe use.

[0030] In this embodiment, as Figure 2 and 5 As shown, the locking unit 9 includes a sliding block 91 and a spring 92 that are slidably sleeved on the outer surface of the guide rod 8. The sliding block 91 is fixedly connected to the adjusting groove 7 via the spring 92. A connecting seat 93 is fixedly installed on the outer side of the sliding block 91. A rotating rod 94 is rotatably connected inside the connecting seat 93. A barb 95 is provided at the end of the rotating rod 94. The barb 95 is slidably inserted into the snap-fit ​​groove 10. In use, by pulling the rotating rod 94, the sliding block 91 is moved towards the fixed ring 4. During the movement, the sliding block 91 compresses the spring 92, storing... The rotating rod 94, having stored elastic potential energy, is rotated to parallel the fixed ring 4 after being pulled to a specified stroke. When the rotating rod 94 is released, the compressed spring 92 begins to release energy, pushing the sliding block 91 back to its original position and causing the rotating rod 94 to move synchronously. The barb 95, driven by the rotating rod 94, precisely inserts into the locking groove 10 to complete the mechanical engagement, ensuring that the barb 95 and the locking groove 10 remain in continuous contact, thus preventing accidental unlocking caused by high-frequency vibration. In other words, the moving ring 6 and the fixed ring 4 are fixedly assembled together through the cooperation between the locking unit 9 and the locking groove 10.

[0031] In this embodiment, as Figure 2 , 4As shown in Figure 5, the width of the sliding block 91 is the same as the width of the adjusting groove 7, and the external dimensions of the barb 95 are adapted to the internal space dimensions of the snap-fit ​​groove 10. During use, the movement trajectory of the sliding block 91 is limited to ensure that the sliding block 91 does not deflect when it moves along the guide rod 8, thus ensuring the accuracy and stability of the movement. The barb 95 and the snap-fit ​​groove 10 are adapted to ensure that the two can fit tightly together to achieve precise snap-fit.

[0032] In this embodiment, as Figure 2 and 4 As shown, there are four of each of the following: adjustment groove 7, guide rod 8, locking unit 9, and snap-fit ​​groove 10. The four adjustment grooves 7, guide rod 8, locking unit 9, and snap-fit ​​groove 10 are evenly distributed in a circular array about the central axis of the connecting part 2. In use, the four sets of locking units 9 form a circumferential equidistant force system to ensure that the moving ring 6 and the fixed ring 4 can be firmly locked together.

[0033] In this embodiment, as Figure 4 As shown, the moving ring 6 has a mounting groove 11 on the side near the working part 3. A magnet 12 is embedded in the mounting groove 11. When in use, the magnet 12 enhances the magnetism of the bit body, so that the working part 3 of the bit body can strongly attract the screw, making it convenient to tighten the screw.

[0034] In this embodiment, as Figure 1 As shown, the clamping part 1, the connecting part 2, and the working part 3 are integrally formed structures. The outer surface of the clamping part 1 is provided with a steel ball limiting groove 13. During use, the integral forming process eliminates the stress concentration points that may be generated by traditional welding, making the load transfer between the components more uniform and effectively resisting the torsional load and shear stress during clamping operations. The steel ball limiting groove 13 is mainly set to prevent the bit body from falling off during use. The steel ball limiting groove 13 cooperates with the locking steel ball in the installation tool to limit the rotation of the bit body and ensure that the bit body will not fall off accidentally.

[0035] The working principle of this utility model is as follows: When using the anti-scalding bit of this application, the temperature sensing ring 5 and the moving ring 6 are slidably sleeved on the connecting part 2 in sequence. Then, by pulling the rotating rod 94, the sliding block 91 is moved towards the fixed ring 4. When the rotating rod 94 is pulled to the specified stroke, the rotating rod 94 is rotated to make it parallel to the fixed ring 4. At this time, the rotating rod 94 is released, and the compressed spring 92 begins to release energy, pushing the sliding block 91 back to its original position and driving the rotating rod 94 to move synchronously. The barb 95 is precisely inserted into the snap-fit ​​groove 10 under the action of the rotating rod 94 to complete the mechanical engagement, fixing the moving ring 6 and the fixed ring 4 together, thus realizing the installation of the temperature sensing ring 5. After that, during use, the temperature of the bit body is transferred to the temperature sensing ring 5 through the thermal conductivity of metal. Since the temperature sensing ring 5 has a built-in reversible thermochromic material, when the temperature exceeds the set threshold, it will trigger a color change. That is, the bit body can remind the operator that the bit body is hot at this time through the color change of the temperature sensing ring 5, and should not be touched, thus ensuring the safety of use.

[0036] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0038] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.

Claims

1. A scalding guard comprising a guard body, characterised in that, The batch head body is composed of a clamping part (1), a connecting part (2) and a working part (3), the outer surface of the connecting part (2) is fixedly sleeved with a fixed ring (4), the outer surface of the connecting part (2) is sleeved with a temperature sensing ring (5) and a moving ring (6) on one side of the fixed ring (4) in sequence, the inner wall of the temperature sensing ring (5) is attached to the outer wall of the connecting part (2), the inside of the temperature sensing ring (5) is filled with reversible thermochromic material, the outer wall of the moving ring (6) is provided with an adjusting groove (7), the inside of the adjusting groove (7) is fixedly connected with a guide rod (8), the outer surface of the guide rod (8) is sleeved with a locking unit (9), the side of the fixed ring (4) away from the moving ring (6) is provided with a clamping groove (10) for clamping insertion of the locking unit (9).

2. An anti-scald faucet according to claim 1, wherein The locking unit (9) comprises a sliding block (91) and a spring (92) which are sleeved on the outer surface of the guide rod (8), and the sliding block (91) is fixedly connected with the adjusting groove (7) through the spring (92), the outer side of the sliding block (91) is fixedly installed with a connecting seat (93), the inside of the connecting seat (93) is rotatably connected with a rotating rod (94), the end of the rotating rod (94) is provided with a barb (95), and the barb (95) is slidingly inserted into the inside of the clamping groove (10).

3. An anti-scald faucet according to claim 2, wherein, The width of the sliding block (91) is the same as the width of the adjusting groove (7), and the outer dimensions of the barb (95) are matched with the internal space dimensions of the clamping groove (10).

4. The anti-scald faucet according to claim 1, wherein, The number of the adjusting groove (7), the guide rod (8), the locking unit (9) and the clamping groove (10) is four, and they are arranged in a circumferential array around the central axis of the connecting part (2).

5. The anti-scald faucet according to claim 1, wherein, The side of the moving ring (6) close to the working part (3) is provided with a mounting groove (11), and the inside of the mounting groove (11) is embeddedly installed with a magnet (12).

6. A scalding protection head according to claim 1, characterized in that The clamping part (1), the connecting part (2) and the working part (3) are integrally formed, and the outer surface of the clamping part (1) is provided with a steel ball limiting groove (13).

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