A high-torque sleeve for preventing slipping off in automobile maintenance

Abstract

The application relates to the technical field of automobile maintenance tools, and discloses a high-torque sleeve for automobile maintenance, which can prevent slipping and falling off, and comprises a sleeve body, an input end arranged at one end of the sleeve body, and a containing cavity containing fasteners arranged at the other end of the sleeve body, a plurality of radial clamping blocks arranged along the circumference of the containing cavity and arranged in the containing cavity, a pre-clamping part, an oil injection ring and an oil injection part. Before the sleeve formally bears a dismounting torque, the radial clamping blocks are driven by the pre-clamping part to clamp the fasteners, and oil is synchronously injected to the fastener connecting area in the clamping process, so that the effect of first stable clamping, then lubricating loosening and then applying a torque for dismounting is achieved. Compared with the ordinary sleeve which is directly dismounted under a torque, the application can reduce the partial load slipping and falling off of the fasteners caused by corrosion, large pre-tightening force or peripheral wear at the initial stage of high torque.

Description

Technical Field

[0001] This invention relates to the field of automotive repair tools, specifically to a high-torque anti-slip sleeve for automotive repair. Background Technology

[0002] In automotive repair, wheel nuts, chassis connection nuts, and suspension bracket nuts typically require the use of socket wrenches with ratchet wrenches, electric impact wrenches, or pneumatic impact wrenches for disassembly and assembly. Because these nuts are exposed to mud, rust, oil, and repeated stress over extended periods, their outer edges are prone to wear or rounding, often requiring significant instantaneous torque for disassembly.

[0003] Most existing sleeves use fixed hexagonal or dodecagonal holes to mate with the outer circumference of the nut. Some sleeves also improve their anti-slip ability by setting serrations, raised edges, or rough contact surfaces on the inner wall. This type of structure mainly relies on the fixed contact between the inner wall of the sleeve and the edges or sides of the nut to achieve torque transmission, which can meet the usage requirements in normal nut assembly and disassembly.

[0004] However, when the nut is heavily corroded, the preload is high, or the outer edges are worn, a regular socket can easily form localized line contact or off-center load contact with the nut. When the impact wrench outputs high torque, the socket is not only prone to slipping circumferentially relative to the nut, but it can also move outward along the nut's axis under impact vibration, causing torque transmission interruption and further aggravating wear on the nut's outer circumference, thus affecting the efficiency of automotive repair disassembly and assembly. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high-torque anti-slip sleeve for automotive repair, aiming to alleviate the aforementioned problems to at least some extent.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: A high-torque anti-slip sleeve for automotive repair, comprising: Sleeve body; One end of the sleeve body is provided with an input end, and the other end is provided with a receiving cavity for accommodating fasteners; Multiple radial clamping blocks are disposed within the receiving cavity and arranged along the circumference of the receiving cavity; An injection ring is disposed within the receiving cavity, and the injection ring is provided with multiple injection pipes; A pre-clamping component is provided between the receiving cavity and the radial clamping block for driving the radial clamping block to move and clamp the fastener; The oil injection component provided on the oil injection ring is used to deliver the oil in the oil injection ring to the oil injection pipe when the pre-clamping component moves the radial clamping block.

[0007] Preferably, the radial clamping block has anti-slip textured edges on the side facing the fastener.

[0008] Preferably, the sleeve body has a sliding opening inside, a sliding strip is slidably connected inside the sliding opening, an oblique opening is provided on the sliding strip, the radial clamping block is provided with a connecting strip extending into the sliding opening, and a guide strip is connected to the connecting strip and slidably engages with the oblique opening.

[0009] Preferably, the tail of the oblique opening has a straight section opening.

[0010] Preferably, the pre-clamping component includes a sleeve rotatably connected to the receiving cavity, the outer wall of the sleeve having multiple helical openings, a guide rod connected to the sliding bar, and the guide rod extending into the helical openings.

[0011] Preferably, the pre-clamping component further includes a rotating end rotatably connected to the receiving cavity, a splined shaft plate slidably connected to one side of the rotating end, a first spring connecting the splined shaft plate and the rotating end, and a splined groove adapted to the splined shaft plate being formed on the inner wall of the sleeve.

[0012] Preferably, the radial clamping block is slidably connected to the bottom of the connecting strip, and a second spring is connected between the radial clamping block and the connecting strip.

[0013] Preferably, the fuel injection component includes a piston shaft slidably connected to the fuel injection pipe, a first one-way valve is provided on the fuel injection pipe, an inlet is provided on the outer wall of the fuel injection pipe located between the piston shaft and the first one-way valve, and a nozzle is provided at the end of the fuel injection pipe.

[0014] Preferably, the injection ring is connected to the sleeve, a piston rod is connected to the splined shaft, the piston rod extends into the injection pipe, the piston shaft is slidably connected to the piston rod, and a third spring is connected between the piston shaft and the piston rod.

[0015] Preferably, a sealing ring is rotatably connected to the outer wall of the injection ring, and an inlet pipe is connected to the sealing ring. The inlet pipe extends to the outside of the sleeve, and a second one-way valve is provided on the inlet pipe.

[0016] In summary, the present invention has the following main beneficial effects: This application incorporates a radial clamping block, a pre-clamping component, an oil injection ring, and an oil injection component within the receiving cavity of the sleeve body. This allows the sleeve to be pre-clamped by the radial clamping block driven by the pre-clamping component before it is subjected to the actual disassembly torque. Simultaneously, oil is sprayed into the fastener connection area during clamping, achieving the effect of first stabilizing the clamp, then lubricating and loosening, and finally applying torque for disassembly. Compared to ordinary sleeves directly subjected to torque for disassembly, this application reduces the risk of slippage and disengagement of fasteners due to corrosion, excessive pre-tightening force, or peripheral wear at the initial stage of high torque. Simultaneously, the oil injection ring rotates with the sleeve and, in conjunction with the delayed oil injection structure, ensures that the oil is distributed circumferentially to the connection area, reducing initial disassembly resistance. The cooperation of the splined shaft, the first spring, the third spring, and the fluid replenishment and air intake structure also avoids problems such as accidental transmission, insufficient oil injection time, and subsequent insufficient oil supply, giving the sleeve better clamping stability and continuous reliability in high-torque disassembly scenarios during automotive repair. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional schematic diagram of the overall structure of the present invention; Figure 3 This is a schematic diagram of the sleeve structure of the present invention; Figure 4 This is a cross-sectional schematic diagram of the radial clamping block structure of the present invention; Figure 5 This is a cross-sectional schematic diagram of the sleeve structure of the present invention; Figure 6 This is a schematic diagram of the splined shaft plate structure of the present invention; Figure 7 This is a partial cross-sectional schematic diagram of the fuel injection ring structure of the present invention; Figure 8 yes Figure 7 A magnified schematic diagram of the local structure at point A.

[0018] Figure label: 1. Sleeve body; 2. Input end; 3. Receiving cavity; 4. Radial clamping block; 5. Injection ring; 6. Injection pipe; 7. Anti-slip texture; 8. Sliding opening; 9. Sliding strip; 10. Angled opening; 11. Connecting strip; 12. Guide strip; 13. Straight section opening; 14. Sleeve; 15. Spiral opening; 16. Guide rod; 17. Rotating end; 18. Splined shaft plate; 19. First spring; 20. Splined groove; 21. Second spring; 22. Piston shaft; 23. First one-way valve; 24. Liquid inlet; 25. Nozzle; 26. Piston rod; 27. Third spring; 28. Sealing ring; 29. ​​Liquid inlet pipe; 30. Second one-way valve. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] refer to Figures 1-8 This embodiment provides a high-torque anti-slip sleeve for automotive repair, used for disassembling fasteners during automotive repair. The fastener can be a nut or a bolt head with an outer circumferential force-bearing surface. The sleeve clamps the fastener before applying the actual disassembly torque and delivers oil around the fastener during clamping to reduce disassembly resistance caused by rust, oil buildup, or prolonged pressure.

[0021] Specifically, it includes a socket body 1. One end of the socket body 1 is provided with an input end 2, which is used to connect to an external torque output tool. The external torque output tool can be a wrench, impact wrench, or other tool that can input torque to the socket body 1. The other end of the socket body 1 is provided with a receiving cavity 3 for accommodating fasteners. The receiving cavity 3 is used to fit around the outer periphery of the fastener during use, so that the fastener enters the socket body 1 and is in a position that can be clamped and rotated.

[0022] The receiving cavity 3 is provided with multiple radial clamping blocks 4, which are arranged around the circumference of the receiving cavity 3. Each radial clamping block 4 is used to displace relative to the fastener under the action of the pre-clamping component, thereby approaching the outer periphery of the fastener and clamping it. Since multiple radial clamping blocks 4 are arranged around the circumference of the receiving cavity 3, clamping can be formed from multiple directions around the outer periphery of the fastener during pre-clamping, so that a more stable contact relationship is formed between the sleeve body 1 and the fastener before the formal torque is transmitted, reducing the risk of slippage caused by wear of the outer periphery of the fastener or unstable local contact in the initial stage of high torque of ordinary sleeves.

[0023] The receiving cavity 3 is also equipped with an oil spray ring 5, which is positioned to deliver oil to the area around the fastener. The oil spray ring 5 has multiple oil spray pipes 6, which distribute and deliver the oil within the oil spray ring 5 to different locations within the receiving cavity 3, ensuring the oil reaches the connection area between the fastener and its mating structure. For nut-type fasteners, the oil can reach the connection between the nut and the threaded rod.

[0024] A pre-clamping component is provided between the receiving cavity 3 and the radial clamping block 4. The pre-clamping component is used to drive the radial clamping block 4 to move and clamp the fastener before the disassembly torque is applied to the sleeve body 1 through the input end 2. In use, the operator first places the receiving cavity 3 on the outer periphery of the fastener, so that the fastener enters the receiving cavity 3; then operates the pre-clamping component to move the multiple radial clamping blocks 4 closer to the outer periphery of the fastener and clamp it. This pre-clamping action is distinguished from the subsequent action of applying the disassembly torque through the input end 2 because in automotive repair, when fasteners are corroded, have outer peripheral wear, or have a large preload, the sleeve is most prone to off-center contact and circumferential slippage when it first bears the disassembly torque. By driving the radial clamping block 4 to clamp the fastener by the pre-clamping component before applying the disassembly torque, the sleeve body 1 and the fastener can form a stable force contact in advance. When the torque is applied by the input end 2, the torque can be transmitted to the fastener through the clamped radial clamping block 4, thereby reducing slippage and jump-out in the initial stage of high torque.

[0025] The oil injection ring 5 is equipped with an oil injection component, which delivers oil from the oil injection ring 5 to the oil injection pipe 6 when the pre-clamping component moves the radial clamping block 4. In other words, during the process of the pre-clamping component driving the radial clamping block 4 to clamp the fastener, the oil injection component simultaneously delivers oil to the oil injection ring 5 and discharges the oil through multiple oil injection pipes 6. With this configuration, the radial clamping block 4 clamps the fastener before the sleeve is actually twisted, and the oil injection pipes 6 simultaneously deliver oil to the fastener connection area, ensuring that the fastener is clamped and lubricated before being twisted. This reduces the initial disassembly resistance caused by corrosion or jamming when the sleeve body 1 is subsequently rotated via the input end 2, and also reduces the likelihood of the sleeve slipping or jumping off relative to the fastener.

[0026] The working process of this embodiment is as follows: First, the receiving cavity 3 of the sleeve body 1 is placed on the outer periphery of the fastener, so that the fastener enters the receiving cavity 3; then, the pre-clamping component is operated, which drives multiple radial clamping blocks 4 to move, so that the radial clamping blocks 4 clamp the fastener; during the movement of the radial clamping blocks 4, the oil injection component delivers oil to the oil injection ring 5, and the oil is distributed by the oil injection ring 5 and enters multiple oil injection pipes 6, and is delivered to the fastener connection area by the oil injection pipes 6; when the fastener is clamped and a predetermined amount of oil is delivered, the oil injection is stopped, and then torque is applied to the sleeve body 1 through the input end 2, so that the sleeve body 1 drives the clamped fastener to rotate.

[0027] Based on the above embodiment, the radial clamping block 4 has anti-slip texture 7 formed on the side facing the fastener. The anti-slip texture 7 is located at the position where the radial clamping block 4 contacts the outer periphery of the fastener. When the pre-clamping component drives the radial clamping block 4 to move and clamp the fastener, the anti-slip texture 7 contacts the outer peripheral surface of the fastener to increase the contact friction between the radial clamping block 4 and the fastener.

[0028] Based on the above embodiment, the sleeve body 1 has a sliding opening 8 inside, and a sliding strip 9 is slidably connected inside the sliding opening 8. The sliding strip 9 can move within the sliding opening 8, and an oblique opening 10 is provided on the sliding strip 9. The oblique opening 10 is used to form a guiding engagement with the radial clamping block 4, so as to convert the movement of the sliding strip 9 into the displacement of the radial clamping block 4 towards or away from the fastener.

[0029] The radial clamping block 4 is provided with a connecting strip 11, which extends into the sliding opening 8. A guide strip 12 is connected to the connecting strip 11, and the guide strip 12 slides in cooperation with the oblique opening 10 on the sliding strip 9. In use, when the pre-clamping component moves the sliding strip 9 within the sliding opening 8, the inner wall of the oblique opening 10 pushes the guide strip 12 to slide along the oblique opening 10. Since the guide strip 12 is connected to the radial clamping block 4 through the connecting strip 11, the force-driven movement of the guide strip 12 can drive the connecting strip 11 to move synchronously, thereby causing the radial clamping block 4 to move closer to the outer periphery of the fastener and clamp the fastener.

[0030] When it is necessary to release the clamp, the sliding bar 9 moves in the opposite direction, and the pushing position of the oblique opening 10 on the guide bar 12 changes. The guide bar 12, through the connecting bar 11, drives the radial clamping block 4 away from the outer periphery of the fastener, thereby releasing the radial clamping block 4 from clamping the fastener. Through the cooperation between the sliding opening 8, the sliding bar 9, the oblique opening 10, the connecting bar 11, and the guide bar 12, the pre-clamping component can have a clear guiding path for the displacement of multiple radial clamping blocks 4, avoiding the radial clamping blocks 4 from shifting or jamming during the clamping process, and ensuring that the sleeve can stably clamp the fastener before being subjected to torque.

[0031] Based on the above embodiment, a straight section opening 13 is provided at the tail of the oblique opening 10, and the straight section opening 13 communicates with the oblique opening 10. The straight section opening 13 is used to accommodate the guide bar 12 after it moves with the sliding bar 9 to the tail of the oblique opening 10, so that the guide bar 12 enters a relatively stable limiting position.

[0032] The sliding bar 9 moves within the sliding opening 8, and the guide bar 12 slides along the oblique opening 10, driving the radial clamping block 4 towards the fastener via the connecting bar 11. After the radial clamping block 4 clamps the fastener, the guide bar 12 enters the straight section opening 13 at the tail of the oblique opening 10. Since the straight section opening 13 forms a limiting section relative to the moving direction of the sliding bar 9, the guide bar 12 no longer continues to slide in the opposite direction along the oblique opening 10 after entering the straight section opening 13, thereby preventing the sliding bar 9 from prematurely returning to its original position due to the reaction force of the fastener on the radial clamping block 4.

[0033] Based on the above embodiments, the pre-clamping component includes a sleeve 14 rotatably connected to the receiving cavity 3. The sleeve 14 is rotatable relative to the sleeve body 1, and the outer wall of the sleeve 14 has multiple helical openings 15. A guide rod 16 is connected to the sliding strip 9, and the guide rod 16 extends into the helical openings 15 and slides with the helical openings 15.

[0034] In practical use, before applying the disassembly torque to the sleeve body 1 through the input end 2, the operator first rotates the sleeve 14 within the receiving cavity 3. During the rotation of the sleeve 14, the spiral opening 15 rotates with the sleeve 14, and the inner wall of the spiral opening 15 pushes the guide rod 16 to move along the spiral opening 15. Since the guide rod 16 is connected to the sliding strip 9, the guide rod 16, after being pushed, drives the sliding strip 9 to slide within the sliding opening 8. When the sliding strip 9 slides, the oblique opening 10 on the sliding strip 9 drives the guide strip 12 to move. The guide strip 12, through the connecting strip 11, drives the radial clamping block 4 to move closer to the fastener, thereby clamping the fastener with the radial clamping block 4.

[0035] By configuring the pre-clamping component as a mating structure of sleeve 14, spiral opening 15, and guide rod 16, the rotation of sleeve 14 can be converted into the sliding of sliding bar 9. The sliding bar 9 then drives the radial clamping block 4 to move, ensuring that the radial clamping block 4 clamps the fastener before the sleeve is subjected to torque. With this configuration, the operator does not need to wait for the radial clamping block 4 to passively clamp during high torque input, reducing the possibility of the sleeve slipping or disengaging relative to the fastener during the initial high torque phase.

[0036] Based on the above embodiments, the pre-clamping component further includes a rotating end 17 rotatably connected within the receiving cavity 3. A splined shaft 18 is slidably connected to one side of the rotating end 17. A first spring 19 connects the splined shaft 18 and the rotating end 17. The inner wall of the sleeve 14 has a spline groove 20 adapted to the splined shaft 18. When not pushed by an external force, the splined shaft 18 is held in a position away from the spline groove 20 by the first spring 19, so that the rotating end 17 and the sleeve 14 are in a disengaged transmission state. When pushed by an external tool, the splined shaft 18 can enter the spline groove 20, so that a temporary transmission connection is formed between the rotating end 17 and the sleeve 14.

[0037] In practical use, the rotating end 17 has a polygonal insertion hole for inserting a hexagonal tool. This polygonal insertion hole receives the rotational force input by the hexagonal tool after insertion. During insertion, the hexagonal tool contacts the splined shaft 18, causing the splined shaft 18 to overcome the elastic force of the first spring 19 and move towards the spline groove 20 until the splined shaft 18 engages with the spline groove 20. At this point, the rotating end 17 and the sleeve 14 switch from a disconnected state to a transmission connection state. When the operator continues to rotate the hexagonal tool, the hexagonal tool drives the rotating end 17 to rotate, and the rotating end 17 drives the sleeve 14 to rotate through the splined shaft 18 and the spline groove 20. After the sleeve 14 rotates, the helical opening 15 pushes the guide rod 16 to move, the guide rod 16 drives the sliding bar 9 to move, and the sliding bar 9, through the engagement of the oblique opening 10 and the guide bar 12, drives the radial clamping block 4 to clamp the fastener.

[0038] After the radial clamping block 4 completes pre-clamping, the operator removes the hexagonal tool, releasing the pushing action of the hexagonal tool on the splined shaft 18. The first spring 19 pushes the splined shaft 18 back to its original position, causing the splined shaft 18 to exit the spline groove 20. The rotating end 17 and the sleeve 14 are then back to a disconnected transmission state. Since the sleeve body 1 may be subjected to axial vibration and circumferential impact from the impact wrench when disassembly torque is subsequently applied through the input end 2, if the rotating end 17 remains in a transmission connection with the sleeve 14, vibration or external accidental contact can easily be transmitted to the sleeve 14 via the rotating end 17, causing the sliding bar 9 to shift back or the clamping state of the radial clamping block 4 to change. In this embodiment, the splined shaft 18, spline groove 20, and first spring 19 form a temporary transmission structure that engages when the tool is inserted and disengages when the tool is removed. This ensures that the pre-clamping action only occurs when the operator actively inserts the hexagonal tool. During the subsequent high-torque disassembly stage, the erroneous driving path of the rotating end 17 to the sleeve 14 is cut off, thereby improving the stability of the radial clamping block 4's clamping state.

[0039] Based on the above embodiment, the radial clamping block 4 is slidably connected to the bottom of the connecting bar 11, and a second spring 21 is connected between the radial clamping block 4 and the connecting bar 11. There is an movable gap between the radial clamping block 4 and the connecting bar 11 for the radial clamping block 4 to move relative to the connecting bar 11. The second spring 21 is located in the movable gap and is used to apply an elastic force toward the fastener to the radial clamping block 4. The receiving cavity 3 of the sleeve body 1 is sleeved on the outer periphery of the fastener. Under the action of the second spring 21, the radial clamping block 4 can first form a slight contact with the outer periphery of the fastener, so that the fastener is initially positioned in the receiving cavity 3.

[0040] Based on the above embodiments, the fuel injection component includes a piston shaft 22 slidably connected to the fuel injection pipe 6, a first one-way valve 23 provided on the fuel injection pipe 6, and a liquid inlet 24 opened on the outer wall of the fuel injection pipe 6. The liquid inlet 24 is located between the piston shaft 22 and the first one-way valve 23, and a nozzle 25 is provided at the end of the fuel injection pipe 6. The liquid inlet 24 communicates with the fuel injection ring 5, allowing the fuel in the fuel injection ring 5 to enter the fuel injection pipe 6 through the liquid inlet 24.

[0041] The first one-way valve 23 is open from the inside of the injection pipe 6 toward the nozzle 25, so that the oil in the injection pipe 6 can enter the nozzle 25 through the first one-way valve 23 and be sprayed out, and the oil on the nozzle 25 side is restricted from flowing back into the injection pipe 6.

[0042] In practical use, as the pre-clamping component drives the radial clamping block 4 to move, the piston shaft 22 moves relative to the injection pipe 6. Initially, the oil in the injection ring 5 can enter the injection pipe 6 through the inlet 24. As the piston shaft 22 continues to move and covers the inlet 24, the inlet 24 is sealed by the piston shaft 22, forming a relatively closed pressure chamber between the piston shaft 22 and the first one-way valve 23. As the piston shaft 22 continues to move towards the first one-way valve 23, the oil in the pressure chamber is pressurized, creating positive pressure. The first one-way valve 23 opens under this pressure, allowing the oil to enter the nozzle 25 and be sprayed from the nozzle 25 towards the fastener connection area.

[0043] When the pre-clamping action is completed or the piston shaft 22 returns to its original position, the pressure inside the injection pipe 6 decreases, and the first one-way valve 23 closes to prevent oil backflow from the nozzle 25 side. When the piston shaft 22 returns to near its initial position, the inlet port 24 reopens, and the oil in the injection ring 5 is replenished into the injection pipe 6 through the inlet port 24 under the negative pressure inside the injection pipe 6, preparing for the next injection action. With the above structure, the injection component can complete the injection, sealing, pressurized injection, and return replenishment by utilizing the reciprocating movement of the piston shaft 22, without the need for a separate external oil pump, and can synchronously inject oil into the fastener connection area during the pre-clamping process of the radial clamping block 4.

[0044] Based on the above embodiment, the oil injection ring 5 is connected to the sleeve 14, allowing the oil injection ring 5 to rotate synchronously with the sleeve 14. Since the sleeve 14 rotates relative to the sleeve body 1 during the pre-clamping process, when the oil injection ring 5 rotates with the sleeve 14, the oil injection pipe 6 and the nozzle 25 can change their oil injection positions around the outer circumference of the fastener. This prevents the oil from being sprayed fixedly to a single position, but rather distributes it circumferentially along the fastener to the connection area, improving the uniformity of oil entering rust gaps or threaded connections.

[0045] A piston rod 26 is connected to the splined shaft 18, extending into the fuel injection pipe 6. A piston shaft 22 is slidably connected to the piston rod 26, and a third spring 27 is connected between the piston shaft 22 and the piston rod 26. The piston rod 26 transmits the displacement of the splined shaft 18 to the fuel injection pipe 6, and the piston shaft 22 creates a pressurized fuel injection action within the fuel injection pipe 6. The third spring 27 is located between the piston rod 26 and the piston shaft 22, and applies an elastic thrust to the piston shaft 22 when the piston rod 26 moves.

[0046] In practical use, the operator inserts a hexagonal tool into the rotating end 17, causing the hexagonal tool to contact the splined shaft 18, which then overcomes the spring force of the first spring 19 and moves to a position that mates with the splined groove 20. Simultaneously, the movement of the splined shaft 18 drives the piston rod 26 into the fuel injection pipe 6. The piston rod 26, through the third spring 27, pushes the piston shaft 22 to move. After the piston shaft 22 moves to cover the inlet 24, the inlet 24 is closed, forming a pressure chamber between the piston shaft 22 and the first one-way valve 23. When the piston shaft 22 continues to be pushed by the third spring 27, the oil in the pressure chamber forms a positive pressure, causing the first one-way valve 23 to open, and the oil is sprayed out through the nozzle 25.

[0047] Since the displacement of the splined shaft 18 occurs when the hexagonal tool is inserted into the rotating end 17 and touches the splined shaft 18, the displacement stroke is short and is mainly used to make the splined shaft 18 and the spline groove 20 form a transmission fit. If the piston rod 26 and the piston shaft 22 are rigidly connected, the piston shaft 22 will only complete one oil pressing action at the moment the splined shaft 18 is pushed in, and the oil injection time is short. When the operator then rotates the rotating end 17 and drives the sleeve 14 to rotate through the splined shaft 18, although the oil injection ring 5 can rotate circumferentially with the sleeve 14, the oil injection pipe 6 no longer continuously discharges oil, making it difficult to form circumferential spray in the fastener connection area.

[0048] Therefore, in this embodiment, a third spring 27 is provided between the piston rod 26 and the piston shaft 22. When the hexagonal tool pushes the splined shaft 18, the splined shaft 18 drives the piston rod 26 to move. The piston rod 26 first compresses the third spring 27, allowing the third spring 27 to store elastic potential energy. Subsequently, as the operator rotates the rotating end 17 and drives the sleeve 14 to rotate, the third spring 27 continuously pushes the piston shaft 22 to move relative to the oil injection pipe 6, allowing the oil in the oil injection pipe 6 to continue to be sprayed out through the first one-way valve 23 and the nozzle 25. Thus, the oil spraying action can continue from the moment the splined shaft 18 is pushed in until the sleeve 14 rotates, so that the oil injection ring 5 can still spray oil onto the fastener connection area when it rotates circumferentially with the sleeve 14, thereby achieving circumferential spraying around the fastener.

[0049] When the third spring 27 is released or the pre-clamping action is completed, the piston shaft 22 stops pressing oil. After the hexagonal tool is removed, the splined shaft 18 is reset and drives the piston rod 26 back to its original position. The piston shaft 22 then gradually returns to its initial position. The first one-way valve 23 is closed and the inlet port 24 is reopened, allowing the oil in the injection ring 5 to be replenished into the injection pipe 6 for the next use.

[0050] Based on the above embodiment, a sealing ring 28 is rotatably connected to the outer wall of the injection ring 5. An inlet pipe 29 is connected to the sealing ring 28, extending to the outside of the sleeve 14. A second one-way valve 30 is provided on the inlet pipe 29. The sealing ring 28 is used to maintain a relatively stable external connection position of the inlet pipe 29 when the injection ring 5 rotates with the sleeve 14, preventing the inlet pipe 29 from twisting as the injection ring 5 rotates, and ensuring a sealed connection between the inlet pipe 29 and the injection ring 5. In specific use, the injection ring 5 rotates with the sleeve 14 and sprays oil into the fastener connection area through the injection pipe 6. After spraying, the oil in the injection ring 5 and the injection pipe 6 decreases, creating a negative pressure replenishment requirement. At this time, the second one-way valve 30 allows external air or replenishing oil to enter the injection ring 5 through the inlet pipe 29, balancing the pressure inside the injection ring 5 and replenishing oil for the next injection action. The second one-way valve 30 is directed from the outside of the sleeve 14 toward the inside of the injection ring 5, which can prevent the oil in the injection ring 5 from leaking out in the reverse direction from the inlet pipe 29 during injection or shaking.

[0051] By setting a sealing ring 28, an inlet pipe 29, and a second one-way valve 30, a fluid replenishment and air intake channel can be maintained that does not twist with the injection ring 5 even when the injection ring 5 rotates with the sleeve 14. This does not affect the circumferential injection action of the injection ring 5, and allows for fluid replenishment and pressure balancing of the injection ring 5 after injection, ensuring normal injection when pre-clamped again.

[0052] Furthermore, one end of the inlet pipe 29 is connected to the injection ring 5 via a sealing ring 28, and the other end extends to the outside of the sleeve 14 to form a replenishment end. A second one-way valve 30 is installed on the inlet pipe 29, and the conduction direction of the second one-way valve 30 is from the replenishment end toward the inside of the injection ring 5. After a period of use, when the oil in the injection ring 5 is insufficient, the operator inserts an injection needle, oil can nozzle, or other replenishment tool to the replenishment end and pushes oil into the inlet pipe 29, creating a replenishment pressure in the inlet pipe 29 that is higher than the internal pressure of the injection ring 5. The second one-way valve 30 opens under the replenishment pressure, and oil enters the injection ring 5 through the second one-way valve 30. After replenishment is completed, the pressure in the inlet pipe 29 drops, and the second one-way valve 30 closes to prevent the oil in the injection ring 5 from leaking backward. When a negative pressure is formed inside the fuel injection ring 5 after fuel injection, external air can enter the fuel injection ring 5 through the second one-way valve 30 under the action of the internal and external pressure difference, so that the internal pressure of the fuel injection ring 5 can be restored to balance.

[0053] In some embodiments, the first check valve 23 and the second check valve 30 can both be spring-loaded ball check valves, elastic disc check valves, or duckbill check valves.

[0054] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-torque anti-slip sleeve for automotive repair, characterized in that, include: Sleeve body (1); The sleeve body (1) has an input end (2) at one end and a receiving cavity (3) for accommodating fasteners at the other end. Multiple radial clamping blocks (4) are provided in the receiving cavity (3) and arranged along the circumference of the receiving cavity (3); An oil injection ring (5) is provided in the receiving cavity (3), and a plurality of oil injection pipes (6) are provided on the oil injection ring (5); A pre-clamping component is provided between the receiving cavity (3) and the radial clamping block (4) for driving the radial clamping block (4) to move and clamp the fastener; The oil injection component provided on the oil injection ring (5) is used to deliver the oil in the oil injection ring (5) to the oil injection pipe (6) when the pre-clamping component moves the radial clamping block (4).

2. The anti-slip high-torque sleeve for automotive repair according to claim 1, characterized in that, The radial clamping block (4) has anti-slip texture (7) on the side facing the fastener.

3. The anti-slip high-torque sleeve for automotive repair according to claim 1, characterized in that, The sleeve body (1) has a sliding opening (8) inside, a sliding strip (9) is slidably connected inside the sliding opening (8), an oblique opening (10) is provided on the sliding strip (9), a connecting strip (11) is provided on the radial clamping block (4) extending into the sliding opening (8), and a guide strip (12) is connected to the connecting strip (11) and slidably engages with the oblique opening (10).

4. The anti-slip high-torque sleeve for automotive repair according to claim 3, characterized in that, The tail of the oblique opening (10) is provided with a straight section opening (13).

5. A high-torque anti-slip sleeve for automotive repair according to claim 3, characterized in that, The pre-clamping component includes a sleeve (14) rotatably connected to the receiving cavity (3), the outer wall of the sleeve (14) having a plurality of spiral openings (15), a guide rod (16) connected to the sliding bar (9), and the guide rod (16) extending into the spiral openings (15).

6. A high-torque anti-slip sleeve for automotive repair according to claim 5, characterized in that, The pre-clamping component also includes a rotating end (17) rotatably connected to the receiving cavity (3), a splined shaft plate (18) slidably connected to one side of the rotating end (17), a first spring (19) connected between the splined shaft plate (18) and the rotating end (17), and a splined groove (20) adapted to the splined shaft plate (18) is opened on the inner wall of the sleeve (14).

7. A high-torque anti-slip sleeve for automotive repair according to claim 3, characterized in that, The radial clamping block (4) is slidably connected to the bottom of the connecting bar (11), and a second spring (21) is connected between the radial clamping block (4) and the connecting bar (11).

8. A high-torque anti-slip sleeve for automotive repair according to claim 6, characterized in that, The fuel injection component includes a piston shaft (22) slidably connected to the fuel injection pipe (6), a first one-way valve (23) is provided on the fuel injection pipe (6), an inlet (24) is provided on the outer wall of the fuel injection pipe (6) between the piston shaft (22) and the first one-way valve (23), and a nozzle (25) is provided at the end of the fuel injection pipe (6).

9. A high-torque anti-slip sleeve for automotive repair according to claim 8, characterized in that, The oil injection ring (5) is connected to the sleeve (14), and a piston rod (26) is connected to the splined shaft (18). The piston rod (26) extends into the oil injection pipe (6), and the piston shaft (22) is slidably connected to the piston rod (26) and a third spring (27) is connected between the piston shaft (22) and the piston rod (26).

10. A high-torque anti-slip sleeve for automotive repair according to claim 5, characterized in that, The outer wall of the oil injection ring (5) is rotatably connected to a sealing ring (28), and an inlet pipe (29) is connected to the sealing ring (28). The inlet pipe (29) extends to the outside of the sleeve (14), and a second one-way valve (30) is provided on the inlet pipe (29).

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