A nut screwing device with adjustable specifications

Abstract

The application discloses a nut screwing device with adjustable specifications, which comprises a supporting ring and a sleeve assembly rotatably assembled on the inner wall of the supporting ring; the outer wall of the supporting ring is fixedly connected with a supporting arm and a handle; the sleeve assembly is composed of multiple coaxially arranged sleeves with decreasing inner diameters from outside to inside, and the adjacent two layers of sleeves are axially slidably connected; an adjusting mechanism is arranged on the sleeve assembly to lock or release the axial position of the sleeve, so that the sleeves with different inner diameters selectively enter a working position; a driving mechanism is arranged on the supporting arm and is in transmission connection with the sleeve assembly to drive the sleeve assembly to rotate. In use, the sleeve with the corresponding inner diameter can be selectively moved to the working position according to the nut specification, the sleeve head does not need to be disassembled and replaced, different specifications of nuts can be adapted, the problem that multiple tools need to be carried or the sleeve head needs to be frequently replaced in the prior art is effectively solved, and the specification adaptation capability and operation convenience of the device are improved.

Description

Technical Field

[0001] This invention relates to a nut tightening tool, specifically an adjustable nut tightening device. Background Technology

[0002] During the construction of wind power projects in new energy engineering, due to the diverse specifications of wind turbine units and their supporting equipment, various types and sizes of nuts often need to be tightened. Operators often need to carry multiple wrenches or socket tools of different specifications and frequently change tools during the operation, which not only increases the burden of carrying and storing tools, but also affects the efficiency of the operation.

[0003] To improve ease of operation, existing technologies have developed screw-on tools with interchangeable socket heads, allowing for the adaptation of different nuts by changing the socket head to different specifications. However, such tools still require disassembly and replacement of the socket head during use, making the operation cumbersome. Furthermore, the socket head, as an independent accessory, is easily lost, which is particularly inconvenient in complex working environments such as in the field or at heights. Summary of the Invention

[0004] To address the aforementioned shortcomings in the existing technology, this invention aims to provide an adjustable nut tightening device to improve the adaptability to nuts of different specifications and ease of operation.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: an adjustable nut tightening device, comprising a support ring and a sleeve assembly rotatably mounted on the inner wall of the support ring; a support arm and a handle are fixedly connected to the outer wall of the support ring; The sleeve assembly consists of multiple coaxially arranged sleeves with an inner diameter decreasing from the outside to the inside, and adjacent sleeves are axially slidably connected. The sleeve assembly is provided with an adjustment mechanism to lock or release the axial position of the sleeve, so that sleeves with different inner diameters can selectively enter the working position. The support arm is provided with a drive mechanism, which is connected to the sleeve assembly for driving the sleeve assembly to rotate.

[0006] As a limitation of the present invention, the axial sliding connection structure between the two adjacent sleeves is as follows: in the two adjacent sleeves, a limiting groove is formed on the upper part of the inner wall of the outer sleeve along the axial direction, and a slider is fixedly connected to the corresponding position on the outer wall of the inner sleeve, and the slider slides in the limiting groove.

[0007] As a further limitation of the present invention, in the sleeve assembly, the axial length of each sleeve increases sequentially from the inside to the outside, and the length difference between adjacent sleeves is 2 to 4 cm.

[0008] As a further limitation of the present invention, a first magnetic block is fixedly connected to the bottom of the limiting groove, and a second magnetic block is fixedly connected to the bottom of the slider, wherein the polarities of the first magnetic block and the second magnetic block are opposite.

[0009] As a further limitation of the present invention, the adjusting mechanism includes locking components, the number of which is equal to and corresponds one-to-one with the number of limiting slots, and each set of locking components includes: Two rectangular boxes are arranged opposite each other, and the two rectangular boxes are fixedly connected to the top sides of the corresponding limiting grooves; Each rectangular box has a rectangular plate slidably connected inside it. A spring is fixedly connected between the rectangular plate and the inner wall of the rectangular box on the side away from the slider. The spring is in a compressed state. A locking block is fixedly connected to the side of the rectangular plate facing the slider. The locking block extends out of the rectangular box. The locking blocks of the two rectangular boxes are arranged opposite each other. The top of the rectangular box is provided with a sliding groove, and a first connecting block is slidably connected in the sliding groove. The first connecting block is fixedly connected to the rectangular plate; a movable plate is hinged to the top of the first connecting block. The movable plates on both rectangular boxes are hinged to the same second connecting block; The slider has slots on both sides that mate with the locking block. When the second connecting block is pressed down, the linkage between the movable plate and the first connecting block causes the rectangular plate to compress the spring, causing the locking block to retract into the rectangular box, thereby releasing the slider and allowing the sleeve to fall down to the working position along the limiting groove. When the sleeve is pushed up until the slot aligns with the locking block, the spring drives the locking block to automatically pop out and engage with the slot, thereby locking the slider and disengaging the sleeve from the working position.

[0010] As a further limitation of the present invention, the driving mechanism includes: A connecting box is fixedly connected to the inner side of the support arm; The worm gear is rotatably connected inside the connecting box, with its top end extending to the outside of the connecting box and fixedly connected to a handwheel; A worm gear meshes with the worm, and a support rod is fixedly connected to the inner ring of the worm gear; The driving bevel gear is fixedly connected to the support rod; The driven bevel gear meshes with the driving bevel gear, and the support shaft of the driven bevel gear is rotatably mounted on the connecting box; The first gear is fixedly connected to the support shaft; The second gear meshes with the first gear; A connecting shaft is fixedly connected to the inner ring of the second gear. The bottom end of the connecting shaft extends to the outside of the connecting box and is fixedly connected to the sleeve assembly via a support frame.

[0011] By adopting the above-described technical solution, the beneficial effects achieved by this invention compared to the prior art are as follows: (1) In this invention, the sleeve assembly is composed of multiple coaxially nested and axially sliding sleeves, and the inner diameter of each sleeve decreases from the outside to the inside. When in use, the sleeve with the corresponding inner diameter can be selectively moved to the working position according to the nut specification. There is no need to disassemble and replace the sleeve head, so it can be adapted to nuts of different specifications. This effectively solves the problem of having to carry multiple tools or frequently replace the sleeve head in the prior art, and improves the specification adaptability and operation convenience of the device.

[0012] (2) The adjustment mechanism in this invention adopts a multi-link locking structure consisting of a rectangular box, a rectangular plate, a spring, a locking block, a first connecting block, a movable plate, and a second connecting block. When the second connecting block is pressed down, the rectangular plate is further compressed by the linkage between the movable plate and the first connecting block, causing the locking block to retract into the rectangular box, releasing the lock on the slider, so that the sleeve can fall to the working position along the limiting groove under the action of gravity, making the operation convenient and labor-saving. When it is necessary to remove the sleeve from the working position, push the sleeve up until the slider slot is aligned with the locking block, and the locking block will automatically pop out and lock into the slot under the drive of the spring, relocking the axial position of the sleeve. This adjustment mechanism has a compact structure and reliable operation. The unlocking and locking operations can be completed with one hand, effectively improving the efficiency and convenience of specification switching.

[0013] (3) The present invention sets up a drive mechanism consisting of a worm, a worm wheel, a bevel gear pair and a gear pair, with a handwheel as the power input end. No power supply is required, and it is suitable for working environments without stable power supply, such as in the field or at high altitudes. At the same time, the worm and worm wheel transmission has a self-locking characteristic, which, together with the gear transmission, realizes the accurate transmission of torque. It can effectively avoid the nut not being installed properly or the thread being damaged due to uneven force, and improves the reliability and adaptability of operation while ensuring the fastening quality.

[0014] (4) By setting a first magnetic block at the bottom of the limiting groove and a second magnetic block with opposite polarity at the bottom of the slider, when the sleeve slides along the limiting groove to the bottom after being unlocked, the first magnetic block and the second magnetic block attract each other, providing clear feedback to the operator in place; at the same time, when the sleeve is in the working position and not locked by the block, the magnetic attraction force can help maintain the stability of the sleeve position, prevent the sleeve from accidentally retracting due to external force or vibration, and further improve the reliability of the specification adjustment operation and the user experience. Attached Figure Description

[0015] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present invention; Figure 2 This is a three-dimensional structural diagram from a second perspective of an embodiment of the present invention; Figure 3 This is a three-dimensional structural diagram from a third perspective of an embodiment of the present invention; Figure 4 This is a schematic diagram of the locking component in an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal structure of the drive mechanism in an embodiment of the present invention; Figure 6 for Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a schematic diagram of the sleeve assembly in an embodiment of the present invention, in which the slider is hidden. Figure 8 This is a schematic diagram of the inner sleeve structure in an embodiment of the present invention; In the diagram: 1. Support ring; 2. Sleeve assembly; 3. Adjustment mechanism; 4. Drive mechanism; 5. Support arm; 6. Handle; 7. Support frame; 101. Sleeve 1; 102. Sleeve 2; 103. Sleeve 3; 104. Sleeve 4; 105. Limiting groove; 106. Slider; 107. First magnetic block; 108. Second magnetic block; 201. Rectangular box; 202. Rectangular plate; 203. Spring; 204. Locking block; 205. Slide groove; 206. First connecting block; 207. Movable plate; 208. Second connecting block; 209. Bayonet; 301. Connecting box; 302. Worm gear; 303. Handwheel; 304. Worm wheel; 305. Support rod; 306. Driving bevel gear; 307. Support shaft; 308. Driven bevel gear; 309. First gear; 310. Second gear; 311. Connecting shaft. Detailed Implementation

[0017] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0018] Please see Figures 1 to 8 This embodiment provides an adjustable nut tightening device, including a support ring 1, a sleeve assembly 2, an adjustment mechanism 3, and a drive mechanism 4.

[0019] The support ring 1 has a circular structure, and a support arm 5 and a handle 6 are fixedly connected to the outer wall of the support ring 1. The handle 6 is used for the operator to grip, and the support arm 5 is used to install the drive mechanism 4.

[0020] The sleeve assembly 2 is rotatably mounted on the inner wall of the support ring 1. The sleeve assembly 2 consists of multiple coaxially arranged sleeves, with the inner diameter of each sleeve decreasing sequentially from the outside to the inside, to accommodate nuts of different sizes. In this embodiment, the sleeve assembly 2 includes sleeve one 101, sleeve two 102, sleeve three 103, and sleeve four 104 arranged coaxially from the outside to the inside. The inner hole of each sleeve is a regular hexagon to mate with a hexagonal nut.

[0021] The axial sliding connection between adjacent sleeve layers is specifically structured as follows: Between each pair of adjacent sleeve layers, two axially opposite limiting grooves 105 are formed on the upper part of the inner wall of the outer sleeve, and two sliders 106 are fixedly connected at corresponding positions on the outer wall of the inner sleeve. Each slider 106 slides within its corresponding limiting groove 105. Taking sleeve one 101 and sleeve two 102 as examples, two axially opposite limiting grooves 105 are formed on the upper part of the inner wall of sleeve one 101, and two sliders 106 are fixedly connected to the outer wall of sleeve two 102. Similarly, the same sliding connection structure is used between sleeve two 102 and sleeve three 103, and between sleeve three 103 and sleeve four 104. That is, each pair of adjacent sleeves is axially slidingly connected through two sets of oppositely arranged limiting grooves 105 and sliders 106. Through this structure, each inner sleeve can slide smoothly relative to the outer sleeve along the axial direction, allowing sleeves of different inner diameters to selectively enter the working position. The working position refers to the position where the inner sleeve slides downward along the axis until its bottom is flush with the bottom of the outermost sleeve (i.e., sleeve 101). At this time, the internal hexagonal hole of the inner sleeve is exposed, and a nut of the corresponding specification can be fitted in.

[0022] In this embodiment, the axial length of each sleeve decreases sequentially from the outside to the inside (i.e., the outermost sleeve 101 has the longest axial length, followed by sleeve 2 102, then sleeve 3 103, and the innermost sleeve 4 104 has the shortest axial length). The length difference between adjacent sleeves is 2-4 cm, specifically 3 cm in this embodiment. The purpose of this arrangement is that when a certain inner sleeve (e.g., sleeve 2 102) is selected for use, after releasing the sleeve and allowing it to fall along the limiting groove 105, because its length is greater than that of the innermost sleeves 3 103 and 4 104, the bottom working hole of sleeve 2 102 can be fully exposed and will not be blocked by the shorter sleeves 3 103 and 4 104, ensuring that each sleeve can be properly fitted into the corresponding nut in the working position.

[0023] To accommodate the length differences among the sleeves, the axial length of the limiting grooves 105 for each layer is set differently. Specifically, since the inner sleeve needs to fall until its bottom is flush with the bottom of the outermost sleeve 101, the closer the sleeve is to the inside, the longer the axial travel required for sliding. Therefore, the length of its corresponding limiting groove 105 also increases accordingly. In this embodiment, the limiting groove 105 on the inner wall of sleeve 101 for sliding sleeve 2 102 is the shortest, the limiting groove 105 on the inner wall of sleeve 2 102 for sliding sleeve 3 103 is the next longest, and the limiting groove 105 on the inner wall of sleeve 3 103 for sliding sleeve 4 104 is the longest. Thus, when each inner sleeve slides to the bottom within its corresponding limiting groove 105, its bottom is exactly flush with the bottom of sleeve 101, achieving precise working position positioning.

[0024] An adjusting mechanism 3 is mounted on the sleeve assembly 2 and is used to lock or release the axial position of each inner sleeve. The adjusting mechanism 3 includes locking components that are equal in number and correspond one-to-one with the limiting grooves 105. Since two limiting grooves 105 are provided between each pair of adjacent sleeves, each axially sliding inner sleeve corresponds to two sets of locking components, located on opposite sides of the inner sleeve. The specific structure of each locking component is as follows: Each locking assembly includes two rectangular boxes 201 arranged opposite each other. The two rectangular boxes 201 are fixedly connected to the top end faces of the outer sleeves on both sides of the top of the corresponding limiting groove 105. A rectangular plate 202 is slidably connected inside each rectangular box 201. A spring 203 is fixedly connected between the rectangular plate 202 and the inner wall of the rectangular box 201 on the side away from the slider 106. The spring 203 is in a compressed state and has the tendency to push the rectangular plate 202 towards the slider 106.

[0025] A locking block 204 is fixedly connected to the side of the rectangular plate 202 facing the slider 106. The locking block 204 extends out of the rectangular box 201, and the locking blocks 204 of the two rectangular boxes 201 are arranged opposite each other. A sliding groove 205 is opened on the top of the rectangular box 201, and a first connecting block 206 is slidably connected in the sliding groove 205. The first connecting block 206 is fixedly connected to the rectangular plate 202. A movable plate 207 is hinged to the top of the first connecting block 206, and the movable plates 207 on the two rectangular boxes 201 are both hinged to the same second connecting block 208. Thus, the second connecting block 208, the two movable plates 207, the two first connecting blocks 206, and the two rectangular plates 202 together constitute a multi-link linkage mechanism.

[0026] The slider 106 has slots 209 on both sides that cooperate with the locking block 204.

[0027] The working principle of the adjustment mechanism 3 is as follows: In the initial locked state, the locking block 204, driven by the spring 203, engages with the slot 209 of the slider 106, locking the inner sleeve in the non-working position (i.e., the bottom of the sleeve is not extended to the bottom of the outermost sleeve in the retracted position). When the second connecting block 208 is pressed down, the second connecting block 208 drives the two first connecting blocks 206 to slide in opposite directions through the two movable plates 207. The first connecting blocks 206 drive the rectangular plate 202 to further compress the spring 203, causing the locking block 204 to retract into the rectangular box 201 and disengage from the slot 209 of the slider 106, thereby releasing the lock on the slider 106. At this time, the inner sleeve can slide downward along the limiting groove 105 under the action of gravity until the two sliders 106 slide to the bottom of the corresponding limiting groove 105, and the bottom of the inner sleeve is flush with the bottom of the outermost sleeve, at which point the inner sleeve enters the working position. When it is necessary to remove the inner sleeve from the working position, the operator pushes the sleeve upward, causing the slider 106 to move upward along the limiting groove 105. When the latches 209 on both sides of the slider 106 are aligned with the latches 204, the latches 204 automatically pop out and latch into the latches 209 under the drive of the spring 203, relocking the slider 106, and the sleeve is fixed in the non-working position.

[0028] To further enhance the stability of the adjustment operation, a first magnetic block 107 is fixedly connected to the bottom of each limiting groove 105, and a second magnetic block 108 is fixedly connected to the bottom of each slider 106. The first magnetic block 107 and the second magnetic block 108 have opposite polarities. When the inner sleeve falls to the working position, the first magnetic block 107 and the second magnetic block 108 attract each other. On the one hand, this provides the operator with clear feedback on the position. On the other hand, when the sleeve is in the working position and is not locked by the locking block 204, the magnetic attraction force can help maintain the stability of the sleeve position and prevent the sleeve from accidentally retracting due to external force or vibration.

[0029] A drive mechanism 4 is mounted on the support arm 5 to receive driving force and rotate the sleeve assembly 2. The drive mechanism 4 includes a connecting box 301, which is fixedly connected to the inner side of the support arm 5. A worm gear 302 is rotatably connected inside the connecting box 301, with its top end extending to the outside of the connecting box 301 and fixedly connected to a handwheel 303. A worm wheel 304, meshing with the worm gear 302, is also rotatably connected inside the connecting box 301, and a support rod 305 is fixedly connected to the inner ring of the worm wheel 304. A driving bevel gear 306 is fixedly connected to the support rod 305, and a support shaft 307 is rotatably mounted on the connecting box 301. A driven bevel gear 308, meshing with the driving bevel gear 306, is fixedly connected to the support shaft 307. A first gear 309 is also fixedly connected to the support shaft 307, and a second gear 310, meshing with the outer ring of the first gear 309, is rotatably connected inside the connecting box 301. The inner ring of the second gear 310 is fixedly connected to a connecting shaft 311. The bottom end of the connecting shaft 311 extends to the outside of the connecting box 301 and is fixedly connected to the top of the outermost sleeve (i.e., sleeve 101) of the sleeve assembly 2 through the support frame 7.

[0030] The working principle of the drive mechanism 4 is as follows: The operator rotates the handwheel 303, which drives the worm gear 3024 to rotate. The worm gear 302 drives the worm wheel 304 to rotate. The worm wheel 304 drives the driving bevel gear 306 to rotate via the support rod 305. The driving bevel gear 306 drives the support shaft 307 to rotate via the driven bevel gear 308 meshing with it. The first gear 309 on the support shaft 307 rotates accordingly, driving the second gear 310 meshing with it to rotate. The second gear 310 drives the outermost sleeve of the sleeve assembly 2 to rotate via the connecting shaft 311 and the support frame 7, thereby driving the entire sleeve assembly 2 to rotate. Through the inner hexagonal hole of the sleeve, it drives the inserted nut to rotate, completing the tightening or loosening operation. The transmission structure of the worm gear 302 and the worm wheel 304 has a self-locking characteristic, that is, only the worm gear 302 can drive the worm wheel 304, and the reverse transmission is not possible. Therefore, it can prevent the nut from loosening in the reverse direction during the tightening process, ensuring the stability and reliability of torque transmission.

[0031] In use, the operator first selects the corresponding inner sleeve according to the specifications of the nut to be operated. Pressing down on the second connecting block 208 of the two sets of locking components corresponding to the sleeve causes the locking block 204 to retract and unlock. Under gravity, the inner sleeve falls along the limiting groove 105 to the working position and is positioned by magnetic attraction. Then, holding the handle 6, the operator places the sleeve onto the outside of the nut and cranks the handwheel 303, which drives the sleeve assembly 2 to rotate via the drive mechanism 4, thus tightening or loosening the nut. After the operation is complete, pushing the inner sleeve upwards causes the locking block 204 to re-engage in the locking slot 209, and the sleeve returns to its initial non-working position.

[0032] It should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A nut tightening device with adjustable specifications, characterized in that, It includes a support ring and a sleeve assembly rotatably mounted on the inner wall of the support ring; a support arm and a handle are fixedly connected to the outer wall of the support ring. The sleeve assembly consists of multiple coaxially arranged sleeves with an inner diameter decreasing from the outside to the inside, and adjacent sleeves are axially slidably connected. The sleeve assembly is provided with an adjustment mechanism to lock or release the axial position of the sleeve, so that sleeves with different inner diameters can selectively enter the working position. The support arm is provided with a drive mechanism, which is connected to the sleeve assembly for driving the sleeve assembly to rotate.

2. The adjustable nut tightening device according to claim 1, characterized in that, The axial sliding connection structure between the two adjacent sleeves is as follows: in the two adjacent sleeves, a limiting groove is opened on the upper part of the inner wall of the outer sleeve along the axial direction, and a slider is fixedly connected to the corresponding position on the outer wall of the inner sleeve. The slider slides in the limiting groove.

3. The adjustable nut tightening device according to claim 2, characterized in that, In the sleeve assembly, the axial length of each sleeve increases sequentially from the inside to the outside, and the length difference between adjacent sleeves is 2 to 4 cm.

4. The adjustable nut tightening device according to claim 3, characterized in that, A first magnetic block is fixedly connected to the bottom of the limiting groove, and a second magnetic block is fixedly connected to the bottom of the slider. The first magnetic block and the second magnetic block have opposite polarities.

5. An adjustable nut tightening device according to any one of claims 2-4, characterized in that, The adjusting mechanism includes locking components, the number of which is equal to and corresponds one-to-one with the number of limiting slots. Each set of locking components includes: Two rectangular boxes are arranged opposite each other, and the two rectangular boxes are fixedly connected to the top sides of the corresponding limiting grooves; Each rectangular box has a rectangular plate slidably connected inside it. A spring is fixedly connected between the rectangular plate and the inner wall of the rectangular box on the side away from the slider. The spring is in a compressed state. A locking block is fixedly connected to the side of the rectangular plate facing the slider. The locking block extends out of the rectangular box. The locking blocks of the two rectangular boxes are arranged opposite each other. The top of the rectangular box is provided with a sliding groove, and a first connecting block is slidably connected in the sliding groove. The first connecting block is fixedly connected to the rectangular plate; a movable plate is hinged to the top of the first connecting block. The movable plates on both rectangular boxes are hinged to the same second connecting block; The slider has slots on both sides that engage with the locking block. When the second connecting block is pressed down, the linkage between the movable plate and the first connecting block causes the rectangular plate to compress the spring, causing the locking block to retract into the rectangular box, thereby releasing the slider and allowing the sleeve to fall down to the working position along the limiting groove. When the sleeve is pushed up until the slot aligns with the locking block, the spring drives the locking block to automatically pop out and engage with the slot, thereby locking the slider and disengaging the sleeve from the working position.

6. The adjustable nut tightening device according to claim 5, characterized in that, The drive mechanism includes: A connecting box is fixedly connected to the inner side of the support arm; The worm gear is rotatably connected inside the connecting box, with its top end extending to the outside of the connecting box and fixedly connected to a handwheel; A worm gear meshes with the worm, and a support rod is fixedly connected to the inner ring of the worm gear; The driving bevel gear is fixedly connected to the support rod; The driven bevel gear meshes with the driving bevel gear, and the support shaft of the driven bevel gear is rotatably mounted on the connecting box; The first gear is fixedly connected to the support shaft; The second gear meshes with the first gear; A connecting shaft is fixedly connected to the inner ring of the second gear. The bottom end of the connecting shaft extends to the outside of the connecting box and is fixedly connected to the sleeve assembly via a support frame.

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