A closing positioning sleeve and closing device for self-locking nuts

Abstract

This invention discloses a closing positioning sleeve and closing device for self-locking nuts. The closing positioning sleeve includes a positioning sleeve body with a positioning hole inside, and has an overall cylindrical structure. At least one axial protrusion or one axial groove is evenly distributed on the wall of the hole in the positioning sleeve body, and at least two closing notches are evenly distributed on the upper part of the positioning sleeve body. The closing device includes a base, at least two closing blocks, a driving mechanism, a closing positioning sleeve, and at least two positioning blocks. The positioning blocks are adjustablely positioned on the base, and the inner end of each closing block passes through the closing notch and acts on the self-locking nut to close it. This invention has a simple structure, is easy to operate, and provides accurate closing position positioning. It not only greatly improves the closing efficiency of self-locking nuts and reduces production costs, but also solves the problem of large fluctuations in the final locking performance of self-locking nuts, controls product consistency, and improves the quality of self-locking nuts.

Description

Technical Field

[0001] This invention relates to a closing positioning sleeve and closing device for self-locking nuts, belonging to the field of self-locking nut processing technology. Background Technology

[0002] Common self-locking nut end capping types include three-point end capping, two-point end capping, and rectangular end capping. The end capping is located on the outer circle of the end capping, and its purpose is to solve the problem of locking the self-locking nut and preventing it from loosening.

[0003] For self-locking nuts with a closing mechanism on the outer circumference, the closing method is clearly defined: a three-point closing method is used. The closing position is on the wrench mechanism, specifically in the recess of the wrench mechanism. The closing dimensions, such as closing height and indentation size, are clearly defined. Since self-locking nuts are relatively small, there are currently no specialized tools for positioning them. Using existing positioning devices presents challenges. Firstly, using traditional closing blocks for closing can lead to interference with the positioning device. Secondly, self-locking nuts with a closing mechanism, such as hexagonal or dodecagonal wrench mechanisms, have six or twelve wrench structures evenly distributed on the outer surface of the nut. Figure 18 The diagram shows the structure of the twelve-corner self-locking nut 10. The surface has twelve corners 1001, with recesses 1002 between adjacent corners 1001. The finishing position 1003 is located in the recess 1002. If precise positioning is not performed during finishing, the finishing block cannot automatically align and cannot be accurately positioned within the grooves between adjacent corners, leading to misalignment and breakage of the finishing block. Furthermore, the processing speed is slow, which is unfavorable for mass production. This results in significant fluctuations in the locking performance of the final product, failure to meet standard consistency requirements, and a high risk of product scrapping. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a simple, convenient, and accurate positioning sleeve and closing device for self-locking nuts, which improves closing efficiency.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a positioning sleeve for a self-locking nut, comprising a positioning sleeve body, wherein the positioning sleeve body is provided with a positioning hole inside and is generally cylindrical in shape, wherein at least one axial protrusion or at least one axial groove is evenly distributed on the hole wall of the positioning sleeve body to match the wringing structure of the self-locking nut to be positioned, and at least two closing notches are evenly distributed on the upper part of the positioning sleeve body.

[0006] The beneficial effects of this invention are: the self-locking nut position is accurately positioned by the axial protrusion or axial groove on the inner wall of the positioning sleeve, so that when the inner end of the subsequent closing block closes, it can accurately act on the concave position between adjacent corners of the self-locking nut, thereby satisfying the accurate position of the closing action point of the self-locking nut. The structure is simple and the operation is convenient. It not only greatly improves the positioning efficiency of the self-locking nut, but also further improves the positioning accuracy of the self-locking nut.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, the closing notch is provided in three parts, and a protrusion is formed between adjacent closing notches. The axial ridge or axial groove extends to the inner wall of the protrusion.

[0009] The beneficial effects of adopting the above-mentioned further solutions are that two-point closing can use two closing notches, and three-point closing is equipped with three closing notches, so that the closing block can accurately act on the closing position of the self-locking nut to perform closing processing. The axial convex ridge or axial groove extends to the inner wall of the convex ridge, which makes the positioning of the self-locking nut more stable on the one hand, and makes it easier for the operator to observe the position of the axial convex ridge or axial groove on the other hand, so that the self-locking nut can be accurately placed in the positioning sleeve for closing processing more accurately and quickly.

[0010] Furthermore, the protrusion is provided with a conical structure for positioning the self-locking nut.

[0011] The beneficial effect of adopting the above-mentioned further solution is that the conical structure is set between the inner wall and the top wall of the protrusion, which makes the positioning of the self-locking nut on the positioning sleeve more accurate and stable.

[0012] Furthermore, the positioning sleeve body is also provided with an avoidance groove at the position corresponding to the closing notch.

[0013] The beneficial effect of adopting the above-mentioned further solution is that the avoidance groove makes the bottom of the closing notch as low as possible, thus avoiding interference with the closing process of the closing block.

[0014] The present invention also relates to a closing device for a self-locking nut, comprising a base, at least two closing blocks disposed on the base, and a drive mechanism for driving the closing blocks to move. It also includes a closing positioning sleeve for the self-locking nut as described above, and at least two positioning blocks for positioning the positioning sleeve body. The positioning blocks are disposed on the base in an adjustable position. Under the action of the drive mechanism, the inner end of the closing block passes through the closing notch and acts on the self-locking nut located in the positioning sleeve body to close it.

[0015] The beneficial effects of this invention are as follows: The positioning sleeve is placed on the base according to the number of angles on the outer surface of the self-locking nut to be processed and the effective position of the closing block. The position of the positioning sleeve is determined so that the inner effective end of the closing block extends and acts on the recess between adjacent angles of the self-locking nut. After determining the position of the positioning sleeve, the positioning sleeve is positioned using an adjustable positioning block. Then, the self-locking nut to be processed can be placed on the positioning sleeve. When the closing block extends, it can accurately and efficiently act on the recess between adjacent angles of the self-locking nut. This invention has a simple structure, is easy to operate, and accurately positions the closing point. It not only greatly improves the closing efficiency of the self-locking nut and reduces production costs, but also solves the problem of large fluctuations in the final locking performance of the self-locking nut, controls product consistency, and improves the quality of the self-locking nut.

[0016] Based on the above technical solution, the present invention can be further improved as follows.

[0017] Furthermore, the positioning sleeve body is mounted on the base via a positioning pin, and the upper part of the positioning pin is inserted into the positioning hole.

[0018] The beneficial effect of adopting the above-mentioned further solution is that, in order to further ensure the accurate and rapid positioning of the positioning sleeve on the base, a positioning pin is added. The positioning pin is placed on the base, and the positioning sleeve is fitted onto the positioning pin. By rotating the positioning sleeve, the closing notch is aligned with the position of the closing block. The positioning hole of the positioning sleeve is then assembled with the positioning pin, ready for the closing processing of the self-locking nut.

[0019] Furthermore, the outer surface of the upper part of the positioning pin is also provided with a positioning slot or positioning rib that cooperates with the axial protrusion or axial groove.

[0020] The beneficial effect of adopting the above-mentioned further solution is that there is a positioning groove or positioning ridge on the outer surface of the positioning pin that mates with the positioning hole, which mates with the positioning sleeve. The positioning sleeve is placed directly on the positioning pin according to the corresponding closing notch position of the closing block. The positioning sleeve will not rotate after positioning, and the positioning is more stable and reliable.

[0021] Furthermore, the positioning pin includes an upper pin, a disc body, and a lower pin from top to bottom. The upper pin is positioned and engaged with the positioning sleeve body, and the lower pin is positioned and engaged with the base. The positioning block acts on the positioning sleeve body or the disc body to lock the positioning sleeve body.

[0022] The beneficial effects of adopting the above-mentioned further solution are that the lower pin cooperates with the pin hole on the base, and the upper pin extends into the positioning hole of the positioning sleeve and cooperates with the positioning sleeve for positioning. The disc body not only makes the installation of the positioning pin more stable, but also allows the positioning block to act directly on the disc body. The positioning of the positioning sleeve is achieved through the positioning disc body. On the one hand, it avoids interference with the position of the closing block. On the other hand, the downward action of the positioning block on the disc body is more stable and reliable than the horizontal action on the positioning sleeve, and it also reduces damage to the outer surface of the positioning sleeve.

[0023] Furthermore, the driving mechanism includes a lifting slider and a power mechanism for driving the lifting slider to move up and down. The base is provided with a slider movable groove for the lifting slider to move, and the base is provided with a sliding groove for guiding the closing block. The closing block is provided with a spring hole for accommodating a return spring. The working surface of the lifting slider and the closing block is an inclined surface. The power mechanism is connected to the top or top of the lifting slider.

[0024] The beneficial effect of adopting the above-mentioned further solution is that the lifting slider is limited in the slider movable groove and can only move up and down. By utilizing the cooperation between the slider inclined surface on the inner surface of the lifting slider and the closing inclined surface on the outer end face of the closing block, the lifting action of the lifting slider is converted into the horizontal action of the closing block, thereby realizing that it can move closer to the self-locking nut to realize the closing process or move away from the self-locking nut to realize the material discharge and release of the self-locking nut.

[0025] Furthermore, the power mechanism includes a drive cylinder, the piston rod of which is connected to the lifting slider.

[0026] The beneficial effect of adopting the above-mentioned further solution is that the lifting slider is driven up and down by the drive cylinder, and the horizontal movement of the closing block is driven by the inclined contact surface between the lifting slider and the closing block.

[0027] Furthermore, the positioning block is mounted on the base via an adjustment mechanism.

[0028] The beneficial effect of adopting the above-mentioned further solution is that the positioning block is set to be adjustable in position, which can be used to meet the closing requirements of self-locking nuts of different sizes. It can be used on positioning sleeves or discs of different sizes, and its application will be more extensive. The setting of the adjustment mechanism can meet the adjustment of the specific position of the positioning block.

[0029] Furthermore, the adjustment mechanism includes an adjustment bolt and an adjustment elongated hole. The adjustment elongated hole is disposed on the positioning block, and the base is provided with a bolt hole for positioning the adjustment bolt. The shank of the adjustment bolt passes through the adjustment elongated hole and is connected to the bolt hole.

[0030] The beneficial effect of adopting the above-mentioned further solution is that when the positioning block needs to be adjusted, the adjusting bolt can be loosened, and then the positioning block can be moved relative to the positioning sleeve to adjust the positioning block to a suitable position. Then the adjusting bolt can be tightened so that the positioning sleeve can be accurately and stably positioned by the positioning block.

[0031] Furthermore, the adjustment mechanism includes an adjustment bolt and an adjustment elongated hole. The adjustment elongated hole is disposed on the positioning block, and the positioning block is disposed on the base via a mounting plate. The mounting plate is provided with a bolt hole for positioning the adjustment bolt, and the shank of the adjustment bolt passes through the adjustment elongated hole and is connected to the bolt hole.

[0032] The beneficial effect of adopting the above-mentioned further solution is that the finishing process of self-locking nuts of different sizes requires the use of corresponding positioning sleeves. The positioning position of the positioning block is adjusted according to the size of different positioning sleeves so that the positioning block can accurately position the positioning sleeve and avoid the situation of unstable or inaccurate positioning of the positioning sleeve.

[0033] Furthermore, the base or mounting plate is also provided with a limiting member for limiting the positioning block.

[0034] The beneficial effect of adopting the above-mentioned further solution is that it limits the position of the positioning end of the positioning block, and avoids the positioning block from being too far inward and damaging the positioning sleeve body or the positioning end of the positioning block. Attached Figure Description

[0035] Figure 1 This is a three-dimensional structural diagram of the positioning sleeve of the present invention;

[0036] Figure 2 This is a schematic diagram of the main structure of the positioning sleeve of the present invention;

[0037] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure along the AA direction;

[0038] Figure 4 for Figure 2 A schematic diagram of the cross-sectional structure along the BB direction;

[0039] Figure 5 This is a schematic diagram of the positioning sleeve and self-locking nut of the present invention.

[0040] Figure 6 This is a schematic diagram of the cross-sectional structure of the positioning sleeve and the self-locking nut of the present invention.

[0041] Figure 7 This is a three-dimensional structural diagram of the sealing device of the present invention;

[0042] Figure 8This is a top view of the closing device of the present invention;

[0043] Figure 9 for Figure 8 A schematic diagram of the cross-sectional structure along the CC direction;

[0044] Figure 10 This is a schematic diagram of the structure of the sealing block of the present invention;

[0045] Figure 11 This is a schematic diagram of the vertical cross-sectional structure of the closing block of the present invention;

[0046] Figure 12 This is a schematic diagram of the structure of a positioning block on the base of the present invention;

[0047] Figure 13 This is a schematic diagram of the cross-sectional structure of a positioning block on the base of the present invention;

[0048] Figure 14 This is a schematic diagram of the structure of a constriction block on the base of the present invention;

[0049] Figure 15 This is a schematic diagram of the cross-sectional structure of a constriction block on the base of the present invention;

[0050] Figure 16 This is a schematic diagram of the structure of the positioning sleeve on the positioning pin of the present invention;

[0051] Figure 17 This is a schematic diagram of the cross-sectional structure of the positioning sleeve on the positioning pin according to the present invention;

[0052] Figure 18 This is a schematic diagram of the structure of a twelve-cornered self-locking nut;

[0053] In the diagram, 1. Positioning sleeve; 101. Positioning sleeve body; 102. Positioning hole; 103. Axial protrusion; 104. Closing notch; 105. Protrusion; 106. Conical structure; 107. Clearance groove; 2. Base; 201. Slider movable groove; 202. Slide groove; 203. Groove body; 204. Cover plate; 3. Closing block; 301. Closing inclined surface; 302. Spring hole; 4. Positioning block; 401. Adjusting elongated hole; 5. Positioning pin; 501. Upper pin; 502. Disc body; 503. Lower pin; 6. Lifting slider; 601. Slider inclined surface; 7. Adjusting bolt; 8. Mounting plate; 9. Limiting component; 10. Self-locking nut; 1001. Angle; 1002. Recess; 1003. Closing position. Detailed Implementation

[0054] The principles and features of the present invention are described below with reference to examples. The examples are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0055] like Figures 1-17 As shown, a closing positioning sleeve 1 for a self-locking nut includes a positioning sleeve body 101. The positioning sleeve body 101 has a positioning hole 102 inside and is cylindrical in shape. At least one axial protrusion 103 is evenly distributed on the hole wall of the positioning sleeve body 101, which is adapted to the wringing structure of the self-locking nut 10 to be positioned. At least two closing notches 104 are evenly distributed on the upper part of the positioning sleeve body 101.

[0056] The number of axial protrusions on the hole wall can be selected according to the processing and actual needs. For example, when positioning a twelve-corner nut, any natural number between 1 and 12 can be selected, such as one, two, three... twelve axial protrusions. The hole wall of the positioning sleeve body can be evenly distributed with twelve axial protrusions that match the number of grooves on the outer surface of the twelve-corner nut.

[0057] The axial protrusions 103 on the inner wall of the positioning sleeve 1 accurately correspond the closing position 1003 of the self-locking nut 10 to the working position of the closing block 3. Of course, the number of axial protrusions 103 on the inner wall can be two or three, or even the same as the number of recesses 1002 between the corners 1001 on the surface of the self-locking nut 10 to be processed. The number of axial protrusions 103 can be reasonably selected according to the processing and subsequent positioning convenience, so that the operator can complete the accurate positioning of the self-locking nut 10 on the positioning sleeve 1 more efficiently and accurately.

[0058] The closing notch 104 is provided in three parts, and a protrusion 105 is formed between adjacent closing notches 104. The axial ridge 103 extends to the inner wall of the protrusion 105. Two-point closing can use two closing notches 104, and three-point closing is equipped with three closing notches 104 respectively, so that the closing block 3 can accurately act on the closing position 1003 of the self-locking nut 10 to perform closing processing, which extends the length of the axial ridge 103, making the positioning more stable and reliable. In addition, it is convenient for the operator to observe the position of the axial ridge 103, and can more accurately and quickly place the self-locking nut 10 into the positioning sleeve 1 to wait for closing processing.

[0059] The protrusion 105 is provided with a conical structure 106 for positioning the self-locking nut 10. The conical structure 106 is disposed between the inner wall and the top wall of the protrusion 105, so that the self-locking nut 10 is positioned more accurately and stably on the positioning sleeve 1.

[0060] The positioning sleeve body 101 is also provided with an avoidance groove 107 at the position corresponding to the closing notch 104. The avoidance groove 107 makes the bottom of the closing notch 104 as low as possible, so as to avoid interfering with the closing process of the closing block 3.

[0061] Example 2: A closing positioning sleeve 1 for a self-locking nut includes a positioning sleeve body 101. The positioning sleeve body 101 has a positioning hole 102 inside and is cylindrical in shape. At least one axial groove is evenly distributed on the hole wall of the positioning sleeve body 101 to match the wrench structure of the self-locking nut 10 to be positioned. At least two closing notches 104 are evenly distributed on the upper part of the positioning sleeve body 101.

[0062] The appropriate number of axial grooves can be selected according to processing and actual needs. For example, when positioning a dodecagonal nut, any natural number between 1 and 12 can be selected, such as one, two, three... twelve axial grooves. The axial grooves match the outer surface edges of the dodecagonal nut to be positioned. The hole wall of the positioning sleeve body can be evenly distributed with twelve axial grooves that match the number of outer surface edges of the dodecagonal nut.

[0063] The self-locking nut 10 is positioned by engaging the axial groove with the angle 1001 on the surface of the self-locking nut 10. The position of the axial groove is reasonably arranged in the positioning sleeve 1 or the position of the positioning sleeve 1 on the base 2 is reasonably adjusted, as long as the extension of the closing block 3 can accurately act on the closing position 1003 of the self-locking nut 10 after positioning.

[0064] The closing notch 104 is provided in three parts, and a protrusion 105 is formed between adjacent closing notches 104. The axial groove extends to the inner wall of the protrusion 105. Two-point closing can use two closing notches 104, and three-point closing is equipped with three closing notches 104 respectively, so that the closing block 3 can accurately act on the closing position 1003 of the self-locking nut 10 to perform closing processing. The axial groove extends to the inner wall of the protrusion 105, and the operator can observe the position of the axial protrusion 103 or the axial groove, so as to more accurately and quickly place the self-locking nut 10 into the positioning sleeve 1 to wait for closing processing.

[0065] Example 3: A closing positioning sleeve 1 for a self-locking nut includes a positioning sleeve body 101. The positioning sleeve body 101 has a positioning hole 102 inside and is cylindrical in shape. At least one axial groove is evenly distributed on the hole wall of the positioning sleeve body 101 to match the wringing structure of the self-locking nut 10 to be positioned. At least two closing notches 104 are evenly distributed on the upper part of the positioning sleeve body 101.

[0066] The appropriate number of axial grooves can be selected according to processing and actual needs. For example, when positioning hexagonal nuts, any natural number between 1 and 6 can be selected, such as one, two, three... six axial grooves. The axial grooves match the outer surface edges of the hexagonal nut to be positioned. Six axial grooves matching the number of outer surface edges of the hexagonal nut can be evenly distributed on the hole wall of the positioning sleeve body.

[0067] The closing notch 104 is provided in three parts, and a protrusion 105 is formed between adjacent closing notches 104. The axial groove extends to the inner wall of the protrusion 105.

[0068] The present invention also relates to a closing device for a self-locking nut 10, comprising a base 2, at least two closing blocks 3 disposed on the base 2, and a driving mechanism for driving the closing blocks 3 to move. It also includes a closing positioning sleeve 1 for the self-locking nut as described above, and at least two positioning blocks 4 for positioning the positioning sleeve body 101. The positioning blocks 4 are positionally adjustable on the base 2 and are disposed between adjacent closing blocks. Under the action of the driving mechanism, the inner end of the closing block 3 passes through the closing notch 104 and acts on the self-locking nut 10 located in the positioning sleeve body 101 to close it.

[0069] The positioning sleeve body 101 is mounted on the base 2 via a positioning pin 5, and the upper part of the positioning pin 5 is inserted into the positioning hole 102. To further ensure the accurate and rapid positioning of the positioning sleeve 1 on the base 2, a positioning pin 5 is added. The positioning pin 5 is placed on the base 2, and the positioning sleeve 1 is fitted onto the positioning pin 5. By rotating the positioning sleeve 1, the closing notch 104 is aligned with the position of the closing block 3, and the positioning hole 102 of the positioning sleeve 1 is assembled with the positioning pin 5, ready for the closing processing of the self-locking nut 10.

[0070] The outer surface of the upper part of the positioning pin 5 is also provided with a positioning groove or positioning rib that cooperates with the axial protrusion 103 or axial groove. On the outer surface of the positioning pin 5 that mates with the positioning hole 102, there is a positioning groove or positioning rib that mates with the positioning sleeve 1. The positioning sleeve 1 is directly placed on the positioning pin 5 according to the position of the closing block 3 corresponding to the closing notch 104. After positioning, the positioning sleeve 1 will not rotate, and the positioning is more stable and reliable.

[0071] The positioning pin 5 includes an upper pin 501, a disc 502, and a lower pin 503 from top to bottom. The upper pin 501 is positioned and engaged with the positioning sleeve body 101, and the lower pin 503 is positioned and engaged with the base 2. The positioning block 4 acts on the positioning sleeve body 101 or the disc 502 to lock the positioning sleeve body 101. The lower pin 503 engages with a pin hole on the base 2, and the upper pin 501 extends into the positioning hole 102 of the positioning sleeve 1 and is positioned and engaged with the positioning sleeve 1. The disc 502 not only makes the installation of the positioning pin 5 more stable, but also allows the positioning block 4 to act directly on the disc 502. Positioning of the positioning sleeve 1 is achieved through the positioning disc 502. On the one hand, this avoids interference with the position of the closing block 3. On the other hand, the downward action of the positioning block 4 on the disc 502 is more stable and reliable than the horizontal action on the positioning sleeve 1, and also reduces damage to the outer surface of the positioning sleeve 1.

[0072] The driving mechanism includes a lifting slider 6 and a power mechanism for driving the lifting slider 6 to move up and down. The base 2 is provided with a slider movable groove 201 for the movement of the lifting slider 6, and a sliding groove 202 for guiding the converging block 3. The converging block 3 is provided with a spring hole 302 for accommodating a return spring. The working surfaces of the lifting slider 6 and the converging block 3 are inclined surfaces. The power mechanism is connected to the top or top of the lifting slider 6. The lifting slider 6 is confined within the slider movable groove 201 and can only move up and down. The lifting action of the lifting slider 6 is converted into the horizontal action of the converging block 3 by the cooperation between the slider inclined surface 601 on the inner surface of the lifting slider 6 and the converging inclined surface 301 on the outer end face of the converging block 3. This allows the converging block 3 to move closer to the self-locking nut 10 for converging processing or away from the self-locking nut 10 for material discharge and release.

[0073] In order to facilitate the stable horizontal movement of the closing block 3 in the slide 202, the slide 202 is formed by a groove 203 set on the base 2 and a cover plate 204 set above the groove 203. The cover plate 204 is set on the base 2, thereby constraining the horizontal movement of the closing block 3.

[0074] The power mechanism includes a drive cylinder, the piston rod of which is connected to the lifting slider 6. The drive cylinder drives the lifting slider 6 to move up and down, and the horizontal movement of the closing block 3 is achieved through the inclined contact surface between the lifting slider 6 and the closing block 3.

[0075] The positioning block 4 is mounted on the base 2 via an adjustment mechanism. The positioning block 4 is designed to be position-adjustable to meet the closing requirements of self-locking nuts 10 of different sizes, and can be used on positioning sleeves 1 or discs 502 of different sizes, thus expanding its applications. The adjustment mechanism allows for the adjustment of the specific position of the positioning block 4.

[0076] The adjustment mechanism includes an adjusting bolt 7 and an adjusting elongated hole 401. The adjusting elongated hole 401 is disposed on the positioning block 4. The base 2 is provided with a bolt hole for positioning the adjusting bolt 7. The shank of the adjusting bolt 7 passes through the adjusting elongated hole 401 and connects to the bolt hole. When the positioning block 4 needs adjustment, the adjusting bolt 7 can be loosened, and then the positioning block 4 can move relative to the positioning sleeve 1 to adjust the positioning block 4 to a suitable position. Then, the adjusting bolt 7 is tightened so that the positioning sleeve 1 can be accurately and stably positioned by the positioning block 4.

[0077] The adjustment mechanism includes an adjusting bolt 7 and an adjusting elongated hole 401. The adjusting elongated hole 401 is disposed on the positioning block 4. The positioning block 4 is disposed on the base 2 via a mounting plate 8. The mounting plate 8 has a bolt hole for positioning the adjusting bolt 7. The shank of the adjusting bolt 7 passes through the adjusting elongated hole 401 and connects to the bolt hole. The finishing process of self-locking nuts 10 of different sizes requires the use of corresponding positioning sleeves 1. The positioning position of the positioning block 4 is adjusted according to the size of the different positioning sleeves 1 to ensure that the positioning block 4 can accurately position the positioning sleeve 1, avoiding unstable or inaccurate positioning of the positioning sleeve 1.

[0078] The base 2 or mounting plate 8 is also provided with a limiting member 9 for limiting the positioning block 4. The positioning end position of the positioning block 4 is limited to prevent the positioning block 4 from moving too far inward and damaging the positioning sleeve body 101 or the positioning end of the positioning block 4.

[0079] In the working process, if the self-locking nut 10 of the twelve-corner 1001 needs to be processed with three-point closing, the positioning sleeve 1 has three closing notches 104, and three closing blocks are evenly distributed on the base. A positioning block is provided between adjacent closing blocks, and the three positioning blocks are also evenly distributed on the base. The inner wall of the positioning sleeve 1 can be equipped with three axial protrusions 103, which are located at the corresponding protrusions 105. Of course, there can be two to twelve axial protrusions 103 on the inner wall of the positioning sleeve 1. The positioning pin 5 is installed in the pin hole of the base 2, and then the positioning sleeve 1 is fitted onto the upper pin 501 of the positioning pin 5. The positioning position of the positioning sleeve 1 is such that the inner end of the closing block 3 extends out, so that it can accurately act as a self-locking device. The closing position 1003 of nut 10 is used as a reference. After positioning, the positioning block 4 moves inward, and the inner end of the positioning block 4 acts on the disc 502 or the positioning sleeve 1. The position of the positioning block 4 is locked by adjusting the bolt 7. Then, the self-locking nut 10 to be processed can be directly placed on the positioning sleeve 1. The drive cylinder is activated, and the lifting slider 6 rises. Through the inclined surface cooperation, the closing block 3 moves inward, and its inner end acts on the closing position 1003 of the self-locking nut 10 for closing processing. After processing, the drive cylinder resets, the lifting slider 6 descends, and the closing block 3 resets under the action of the return spring. The processed self-locking nut 10 is then removed, and the processing of the next self-locking nut 10 can begin. This closing device accurately positions the closing position 1003 of the self-locking nut 10, which not only greatly improves the closing efficiency of the self-locking nut 10 and reduces production costs, but also solves the problem of large fluctuations in the final locking performance of the self-locking nut 10, controls product consistency, and improves the quality of the self-locking nut 10.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 closing device for a self-locking nut, characterized in that, The application relates to a self-locking nut closing positioning sleeve and a positioning sleeve body (101) for positioning the self-locking nut closing positioning sleeve (1), and at least two positioning blocks (4) for positioning the positioning sleeve body (101); the positioning blocks (4) are adjustably arranged on the base (2); under the action of the driving mechanism, the inner end of the closing block (3) passes through the closing gap (104) and acts on the self-locking nut (10) located in the positioning sleeve body (101) to realize closing. The self-locking nut closing positioning sleeve comprises a positioning sleeve body (101), the inside of the positioning sleeve body (101) is provided with a positioning hole (102), and the whole is in a cylindrical structure; the hole wall of the positioning sleeve body (101) is uniformly provided with at least one axial convex rib (103) or at least one axial groove which is matched with the wrenching structure of the self-locking nut (10) to be positioned; and the upper portion of the positioning sleeve body (101) is uniformly provided with at least two closing gaps (104). The positioning sleeve body (101) is arranged on the base (2) through a positioning pin (5), the upper portion of the positioning pin (5) is inserted and matched with the positioning hole (102); and the outer surface of the upper portion of the positioning pin (5) is further provided with a positioning notch or a positioning rib which is matched with the axial convex rib (103) or the axial groove. The positioning pin (5) comprises an upper pin (501), a disc body (502) and a lower pin (503) from top to bottom; the upper pin (501) is positioned and matched with the positioning sleeve body (101); the lower pin (503) is positioned and matched with the base (2); and the positioning block (4) acts on the positioning sleeve body (101) or the disc body (502) to lock the positioning sleeve body (101).

2. A closure device for a self-locking nut according to claim 1, characterized in that The closing gap (104) is provided with three, and a convex portion (105) is formed between the adjacent closing gaps (104); and the axial convex rib (103) or the axial groove extends to the inner wall of the convex portion (105).

3. A closure device for a self-locking nut according to claim 2, characterized in that The convex portion (105) is provided with a taper structure (106) for positioning the self-locking nut (10).

4. A closure device for a self-locking nut according to any one of claims 1-3, characterized in that The driving mechanism comprises a lifting slide block (6) and a power mechanism for driving the lifting slide block (6) to move up and down; the base (2) is provided with a slide block moving groove (201) for the action of the lifting slide block (6); the base (2) is provided with a sliding groove (202) for guiding the closing block (3); the closing block (3) is provided with a spring hole (302) for accommodating a return spring; the action surface of the lifting slide block (6) and the closing block (3) is an inclined surface; and the power mechanism is connected with the top of the lifting slide block (6).

5. A closure device for a self-locking nut according to any one of claims 1-3, characterized in that The positioning block (4) is arranged on the base (2) through an adjusting mechanism.

6. A closure device for a self-locking nut according to claim 5, characterized in that The adjusting mechanism comprises an adjusting bolt (7) and an adjusting long hole (401), the adjusting long hole (401) is arranged on the positioning block (4), the base (2) is provided with a bolt hole for positioning the adjusting bolt (7), and the rod part of the adjusting bolt (7) is connected with the bolt hole through the adjusting long hole (401); or the positioning block (4) is arranged on the base (2) through a mounting plate (8), the mounting plate (8) is provided with a bolt hole for positioning the adjusting bolt (7), and the rod part of the adjusting bolt (7) is connected with the bolt hole through the adjusting long hole (401).

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