Quick change nut assembly

Abstract

The utility model provides a kind of quick-change nut assembly, comprising: nut and outer sleeve, nut includes internal thread hole, outer sleeve is set in nut outer;One of nut and outer sleeve is equipped with driving key and another is equipped with driving slot, driving slot and driving key between there is the difference value of circumferential length, to make nut and outer sleeve can be relatively rotated to driving key and driving slot mutually limit and abut first circumferential contact position or second circumferential contact position;At least one of nut and outer sleeve is equipped with rolling groove, first roller is equipped in rolling groove;In the direction of second circumferential contact position to first circumferential contact position, the depth of rolling groove gradually decreases, to when outer sleeve and nut are in first circumferential contact position, first roller and nut and outer sleeve abut, to make outer sleeve and nut switch from non-self-locking state to self-locking state, to solve the problem that quick-change nut in prior art is caused by complex structure and leads to higher cost and more cumbersome use steps.

Description

Technical Field

[0001] This utility model relates to the field of quick-change nut technology, and more specifically, to a quick-change nut assembly. Background Technology

[0002] In the current field of machine tools, nuts, as key components for connection and fixation, are widely used in various tools such as angle grinders and drills. Traditional nuts, due to friction and torque, often self-tighten during machine operation. This makes it difficult for operators to manually loosen the nuts when changing tools or adjusting their position. This not only increases operational complexity and reduces work efficiency but can also cause inconvenience due to the need for additional tools, especially in field operations or emergency situations.

[0003] Existing quick-release nuts, such as those using clips, springs, or other specific unlocking mechanisms, can solve the problem of manually loosening nuts to some extent. However, these quick-release nuts are usually complex in structure, expensive, and have cumbersome usage procedures. They may also experience wear or failure after prolonged use, thus affecting their reliability and durability.

[0004] In addition, some quick-change nuts lack clear feedback during operation, making it difficult for operators to determine whether the nut is fully locked or loosened, which may pose a safety hazard during use. Utility Model Content

[0005] The main objective of this invention is to provide a quick-change nut assembly to solve the problems of high cost and cumbersome usage steps caused by the complex structure of existing quick-change nuts.

[0006] To achieve the above objectives, this utility model provides a quick-change nut assembly, comprising: a nut and an outer sleeve, the nut including an internally threaded hole for threaded connection with an externally threaded component, the outer sleeve being fitted over the nut; one of the nut and the outer sleeve is provided with a drive key, and the other of the nut and the outer sleeve is provided with a drive groove for the drive key to be inserted, the drive groove and the drive key having a circumferential length difference extending along the circumference of the nut, so that the nut and the outer sleeve can rotate relative to each other to a first circumferential contact position or a second circumferential contact position where the drive key and the drive groove mutually limit and abut against each other; at least one of the nut and the outer sleeve is provided with a rolling groove, and the quick-change nut assembly further includes a first roller movably disposed in the rolling groove; the depth of the rolling groove gradually decreases along the direction from the second circumferential contact position to the first circumferential contact position, so that when the outer sleeve and the nut are in the first circumferential contact position, the opposite sides of the first roller abut against the nut and the outer sleeve respectively, so that the outer sleeve and the nut switch from a non-locking state to a self-locking state.

[0007] Furthermore, the drive key has a first limiting key side and a second limiting key side at both ends along the circumference of the nut, and the circumferential distance between the first limiting key side and the second limiting key side is the first circumferential length; the drive groove has a first limiting groove side and a second limiting groove side at both ends along the circumferential of the nut, and the circumferential distance between the first limiting groove side and the second limiting groove side is the second circumferential length; wherein, the first circumferential length is less than the second circumferential length, and the difference in circumferential length remaining after subtracting the first circumferential length from the second circumferential length corresponds to the angle of rotation of the outer sleeve relative to the nut when switching from the non-self-locking state to the self-locking state.

[0008] Furthermore, the nut includes a connecting section, and the outer sleeve includes a receiving cavity for accommodating the nut; wherein, a driving groove is provided in the receiving cavity, and a driving key is provided on the outer peripheral surface of the connecting section; or, the receiving cavity is provided with a driving key, and the connecting section is provided with a driving groove.

[0009] Furthermore, the nut includes a limiting section and a connecting section connected together, the outer diameter of the limiting section being larger than the outer diameter of the connecting section; an internal threaded hole penetrates the limiting section and the connecting section; the outer sleeve includes a receiving cavity for accommodating the nut; wherein a rolling groove is disposed within the receiving cavity of the outer sleeve and is disposed on the end face of the limiting section near the connecting section; and / or, the rolling groove is disposed on the limiting section and is located on the end face of the limiting section near the connecting section.

[0010] Furthermore, the rolling groove is a partial helical groove extending circumferentially along the nut or outer sleeve, and the helix angle of the rolling groove is less than or equal to 8°, so that the two ends of the extension direction of the rolling groove are the deepest position and the shallowest position, respectively; and / or, the first rolling body is a metal sphere, the cross-section of the rolling groove is a part of a circle, the circle is correspondingly set with the metal sphere, and the maximum depth of the rolling groove is less than the diameter of the metal sphere.

[0011] Furthermore, the quick-change nut assembly includes a resilient ring washer, which is fixedly connected to one of the nut and the outer sleeve. The resilient ring washer is provided with a resilient pawl, and the other of the nut and the outer sleeve is provided with a plurality of ratchet teeth for resilient engagement or disengagement with the resilient pawl.

[0012] Furthermore, the nut includes a limiting section and a connecting section connected together, the outer diameter of the limiting section being larger than the outer diameter of the connecting section; an internal threaded hole penetrates the limiting section and the connecting section; the outer sleeve includes a receiving cavity for accommodating the nut, the receiving cavity including a first cavity, a second cavity, and a third cavity connected in sequence, the first cavity and the second cavity respectively corresponding to at least a portion of the limiting section and the connecting section, the outer diameter of the second cavity being smaller than the outer diameter of the first cavity and the outer diameter of the third cavity; wherein, a rolling groove is disposed on the bottom surface of the first cavity, and a driving groove is disposed on the inner wall surface of the second cavity.

[0013] Furthermore, the quick-change nut assembly includes an elastic ring washer disposed between the connecting section and the inner wall of the third cavity; a mating groove is provided on the inner wall of the elastic ring washer, which corresponds to the drive key, so as to fix the elastic ring washer and the nut together; an elastic pawl is provided on the outer circumferential surface of the elastic ring washer, and multiple ratchet teeth are provided at intervals on the inner wall of the third cavity, the elastic pawl being used to elastically engage or disengage with the ratchet teeth; wherein, when the outer sleeve rotates relative to the nut, the ratchet teeth rotate relative to the elastic pawl to produce a sound.

[0014] Furthermore, the elastic ring pad includes an annular ring, wherein a first end of the elastic pawl is fixedly connected to the annular ring, and a second end of the elastic pawl is spaced apart from the annular ring, so that the second end of the elastic pawl is elastically movable in a direction close to or away from the annular ring, so that the elastic pawl engages or disengages with the ratchet teeth; and / or, both the first and second ends of the elastic pawl along the circumference of the annular ring are provided with guide surfaces, the guide surfaces being used to guide the ratchet teeth so that the ratchet teeth slide over the elastic pawl to reciprocate relative to the elastic pawl.

[0015] Furthermore, the quick-change nut assembly includes: a pressure pad and a second roller disposed between the pressure pad and the resilient ring pad; and / or, the second roller and a flat washer located between the resilient ring pad and the second roller.

[0016] Applying the technical solution of this utility model, the quick-change nut assembly of this utility model includes: a nut and an outer sleeve, the nut including an internal threaded hole for threaded connection with an external threaded component, the outer sleeve being fitted over the nut; one of the nut and the outer sleeve is provided with a drive key, the other of the nut and the outer sleeve is provided with a drive groove for the drive key to be inserted, the drive groove and the drive key having a circumferential length difference extending along the circumference of the nut, so that the nut and the outer sleeve can rotate relative to each other to a first circumferential contact position or a second circumferential contact position where the drive key and the drive groove mutually limit and abut against each other; at least one of the nut and the outer sleeve is provided with a rolling groove, the quick-change nut assembly also includes a first roller movably disposed in the rolling groove; the depth of the rolling groove gradually decreases along the direction from the second circumferential contact position to the first circumferential contact position, so that when the outer sleeve and the nut are in the first circumferential contact position, the opposite sides of the first roller abut against the nut and the outer sleeve respectively, so that the outer sleeve and the nut switch from a non-locking state to a self-locking state. In this way, the quick-change nut assembly of this utility model allows the nut and outer sleeve to switch between self-locking and non-self-locking through the cooperation of the drive key, drive groove, rolling groove and first roller. When self-locking, the nut and outer sleeve are simultaneously in a circumferential self-locking state to lock or unlock the relative position between the nut and the external threaded part. Simply rotating the outer sleeve allows the nut to be easily tightened onto or removed from the external threaded part under the drive of the outer sleeve, without the need for additional tools, which greatly improves the operating efficiency and solves the problem of high cost and cumbersome use steps caused by the complex structure of the quick-change nut in the prior art. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic diagram of the structure of an embodiment of the quick-change nut assembly according to the present invention is shown in one direction;

[0019] Figure 2 It shows Figure 1 The diagram shown is a structural schematic of the quick-change nut assembly in another direction;

[0020] Figure 3 It shows Figure 1 A cross-sectional view of the quick-change nut assembly shown;

[0021] Figure 4 It shows Figure 1 The diagram shows the structure of the nut in one direction of the quick-change nut assembly.

[0022] Figure 5 It shows Figure 4 The diagram shown is a structural schematic of the nut in another direction;

[0023] Figure 6 It shows Figure 4 The sectional view of the nut shown;

[0024] Figure 7 It shows Figure 1 The diagram shows the structure of the quick-change nut assembly's outer sleeve in one direction;

[0025] Figure 8 It shows Figure 7 The diagram shows the structure of the jacket in another direction;

[0026] Figure 9 It shows Figure 7 The sectional view of the coat shown;

[0027] Figure 10 It shows Figure 1 A schematic diagram of the elastic ring washer of the quick-change nut assembly shown;

[0028] Figure 11 It shows Figure 1 The diagram shows the structure of the pressure pad of the quick-change nut assembly in one direction;

[0029] Figure 12 It shows Figure 11 The diagram shows the structure of the pressure pad in another direction;

[0030] Figure 13 It shows Figure 11 A cross-sectional view of the pressure pad shown;

[0031] Figure 14 It shows Figure 1 The diagram shows the structure of the retaining ring in the quick-change nut assembly.

[0032] Figure 15 It shows Figure 1 A schematic diagram of the flat washer structure of the quick-change nut assembly shown;

[0033] Figure 16 It shows Figure 1 The diagram shows the structure of the first and second sealing rings of the quick-change nut assembly.

[0034] The above figures include the following reference numerals:

[0035] 1. Nut; 110. Limiting section; 120. Connecting section; 130. Mounting section; 101. First axial end face; 102. Second axial end face; 103. Drive key; 105. Side of first limiting key; 104. Side of second limiting key; 106. Annular mounting groove; 107. Internal threaded hole;

[0036] 2. First rolling element;

[0037] 3. First sealing ring;

[0038] 4. Outer casing; 400. Receiving cavity; 401. Rolling groove; 402. Deepest position; 403. Shallowest position; 404. Drive groove; 405. Side of first limiting groove; 406. Side of second limiting groove; 407. First sealing groove; 408. Ratchet; 409. Second sealing groove; 410. First cavity; 420. Second cavity; 430. Third cavity;

[0039] 5. Elastic ring gasket; 501. Elastic pawl; 502. Mating groove; 503. Guide surface;

[0040] 6. Flat washers;

[0041] 7. Second sealing ring;

[0042] 8. Pressure pad; 801. Mounting groove; 802. First hole section; 803. Second hole section; 804. First outer peripheral surface section; 805. Second outer peripheral surface section; 806. First end face;

[0043] 9. Second rolling element;

[0044] 10. Snap ring. Detailed Implementation

[0045] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0046] like Figures 1 to 16As shown, this utility model provides a quick-change nut assembly, including: a nut 1 and an outer sleeve 4. The nut 1 includes an internal threaded hole 107 for threaded connection with an external threaded component, and the outer sleeve 4 is fitted over the nut 1. One of the nut 1 and the outer sleeve 4 is provided with a drive key 103, and the other of the nut 1 and the outer sleeve 4 is provided with a drive groove 404 for the drive key 103 to be inserted. There is a circumferential length difference between the drive groove 404 and the drive key 103 extending circumferentially along the nut 1, so that the nut 1 and the outer sleeve 4 can rotate relative to each other until the drive key 103 and the drive groove 404 are aligned. 04. The first or second circumferential contact position where the nuts 1 and outer sleeve 4 are mutually limiting and abutting; at least one of the nuts 1 and outer sleeve 4 is provided with a rolling groove 401, and the quick-change nut assembly also includes a first roller 2 movably disposed in the rolling groove 401; along the direction from the second circumferential contact position to the first circumferential contact position, the depth of the rolling groove 401 gradually decreases, so that when the outer sleeve 4 and the nut 1 are in the first circumferential contact position, the opposite sides of the first roller 2 abut against the nut 1 and the outer sleeve 4 respectively, so that the outer sleeve 4 and the nut 1 switch from a non-locking state to a self-locking state.

[0047] The quick-change nut assembly of this utility model allows the nut 1 and the outer sleeve 4 to switch between self-locking and non-self-locking modes through the cooperation of the drive key 103, the drive groove 404, the rolling groove 401, and the first roller 2. This locks or unlocks the relative position between the nut 1 and the external threaded part. Simply rotating the outer sleeve 4 allows the nut 1 to be easily tightened onto or removed from the external threaded part under the drive of the outer sleeve 4, without the need for additional tools. This greatly improves operational efficiency and solves the problem of high cost and cumbersome usage steps caused by the complex structure of existing quick-change nuts.

[0048] When the outer sleeve 4 and the nut 1 are in a self-locking state, the nut 1 and the outer sleeve 4 are located at the first circumferential contact position where the drive key 103 and the drive groove 404 mutually limit and abut against each other, and the first roller 2 is located at the shallower end of the rolling groove 401.

[0049] The shape of the rolling groove 401 in the quick-change nut assembly of this utility model allows the corresponding first roller 2 to roll in the rolling groove 401 when the nut 1 and the outer sleeve 4 rotate relative to each other, for example, from the deepest position 402 to the shallowest position 403 of the rolling groove 401, thereby generating a self-locking effect on the nut 1, ensuring a firm lock between the nut 1 and the part to be installed, or when the nut 1 needs to be loosened, the first roller 2 rolls from the shallowest position 403 to the deepest position 402 of the rolling groove 401, reducing the torque required to loosen the nut 1, realizing quick unlocking between the nut 1 and the part to be installed, simplifying the operation steps, and also enhancing the stability of the nut 1.

[0050] Specifically, the deepest position 402 refers to the deepest position within the rolling groove 401, and the shallowest position 403 refers to the shallowest position within the rolling groove 401.

[0051] The application scenarios of this utility model's quick-change nut assembly include all occasions where manual tightening and loosening of nuts are required, especially in environments where frequent adjustment or replacement of tool accessories is required, such as repair shops, production lines, and various power tools that require frequent tool head replacement, such as angle grinders and electric drills. It is particularly suitable for on-site operations, can significantly reduce operation time, can quickly replace tool heads, and improve work efficiency.

[0052] like Figures 1 to 9 As shown, the drive key 103 has a first limiting key side 105 and a second limiting key side 104 respectively at both ends of the circumference of the nut 1. The circumferential distance between the first limiting key side 105 and the second limiting key side 104 is the first circumferential length. The drive groove 404 has a first limiting groove side 405 and a second limiting groove side 406 respectively at both ends of the circumferential direction of the nut 1. The circumferential distance between the first limiting groove side 405 and the second limiting groove side 406 is the second circumferential length. The first circumferential length is less than the second circumferential length. The difference in circumferential length remaining after subtracting the first circumferential length from the second circumferential length corresponds to the angle of rotation of the outer sleeve 4 relative to the nut 1 when switching from the non-locking state to the locking state.

[0053] Optionally, the nut 1 includes a limiting section 110 and a connecting section 120 connected together, the outer diameter of the limiting section 110 being larger than the outer diameter of the connecting section 120; the internal threaded hole 107 penetrates the limiting section 110 and the connecting section 120; the outer sleeve 4 includes a receiving cavity 400 for accommodating the nut 1; wherein, a driving groove 404 is provided in the receiving cavity 400, and a driving key 103 is provided on the outer peripheral surface of the connecting section 120; or, the receiving cavity 400 is provided with a driving key 103, and the connecting section 120 is provided with a driving groove 404.

[0054] Optionally, the nut 1 includes a limiting section 110 and a connecting section 120 connected together, the outer diameter of the limiting section 110 being larger than the outer diameter of the connecting section 120; an internal threaded hole 107 passing through the limiting section 110 and the connecting section 120; the outer sleeve 4 includes a receiving cavity 400 for accommodating the nut 1; wherein, a rolling groove 401 is disposed within the receiving cavity 400 of the outer sleeve 4 and is disposed on the end face of the limiting section 110 near the connecting section 120; and / or, the rolling groove 401 is disposed on the limiting section 110 and located on the end face of the limiting section 110 near the connecting section 120.

[0055] like Figures 1 to 9 As shown, the first limiting groove side 405 and the second limiting groove side 406 are respectively set to correspond to the first limiting key side 105 and the second limiting key side 104.

[0056] like Figures 7 to 9 As shown, the nut 1 includes a limiting section 110 and a connecting section 120 connected together, the outer diameter of the limiting section 110 being larger than the outer diameter of the connecting section 120; the internal threaded hole 107 penetrates the limiting section 110 and the connecting section 120; the outer sleeve 4 includes a receiving cavity 400 for accommodating the nut 1, the receiving cavity 400 including a first cavity 410 and a second cavity 420 connected in sequence, the first cavity 410 and the second cavity 420 respectively corresponding to at least a portion of the limiting section 110 and the connecting section 120, the outer diameter of the second cavity 420 being smaller than the outer diameter of the first cavity 410; wherein, a rolling groove 401 is disposed on the bottom surface of the first cavity 410, and a driving groove 404 is disposed on the inner wall surface of the second cavity 420.

[0057] Specifically, the end face of the limiting segment 110 that is in contact with the first roller 2 is the first axial end face 101, and the side of the rolling groove 401 that is away from the bottom surface of the first cavity 410 is used to abut or separate from the first axial end face 101.

[0058] The outer sleeve 4 of the quick-change nut assembly of this utility model, by setting a segmented receiving cavity 400, can better adapt to the structure of the nut 1, ensure the precise fit between the components, not only optimize the overall layout of the nut assembly, but also facilitate the assembly and disassembly of the components, reduce the manufacturing difficulty, improve the assembly efficiency, meet the needs of high-intensity and high-frequency use, and ensure the continuous and efficient operation of the corresponding equipment.

[0059] like Figures 4 to 9 As shown, there are multiple drive keys 103 and multiple drive slots 404. Multiple drive keys 103 are arranged at intervals around the periphery of the connecting segment 120, and multiple drive slots 404 are arranged in a one-to-one correspondence with multiple drive keys 103; and / or, there are multiple rolling grooves 401 and multiple first rollers 2. Multiple rolling grooves 401 are arranged at intervals around the periphery of the connecting segment 120, and multiple first rollers 2 are arranged in a one-to-one correspondence with multiple rolling grooves 401.

[0060] The quick-change nut assembly of this utility model provides a more uniform torque distribution between the nut 1 and the outer sleeve 4 through the cooperation of multiple drive keys 103 and multiple drive grooves 404, as well as the cooperation of multiple rolling grooves 401 and multiple first rollers 2, ensuring the smoothness of the nut 1 when tightening or loosening.

[0061] like Figures 4 to 9As shown, the rolling groove 401 is a partial helical groove extending circumferentially along the nut 1 or the outer sleeve 4. The helix angle of the rolling groove 401 is less than or equal to 8°, so that the two ends of the extension direction of the rolling groove 401 are the deepest position 402 and the shallowest position 403, respectively; and / or, the first roller 2 is a metal sphere, the cross-section of the rolling groove 401 is a part of a circle, the circle is correspondingly set with the metal sphere, and the maximum depth of the rolling groove 401 is less than the diameter of the metal sphere.

[0062] Furthermore, the helix angle of the rolling groove 401 is less than or equal to 8°, that is, the angle between the tangent of the extension line of the rolling groove 401 and the bottom surface of the first cavity 410 is less than or equal to 8°.

[0063] The angle between the bottom surface of the rolling groove 401 and the bottom surface of the first cavity 410 in the quick-change nut assembly of this utility model is set so that the first roller 2 can roll in the rolling groove 401 in a timely manner and generate sufficient axial force during the rolling process to achieve a self-locking state between the nut 1 and the outer sleeve 4.

[0064] The quick-change nut assembly of this invention uses metal as the first rolling element 2 because metal has high hardness and wear resistance, and can withstand the wear caused by repeated rolling, ensuring the durability and reliability of the nut assembly. This allows the quick-change nut assembly to maintain good performance even under harsh working conditions, extending its service life.

[0065] like Figures 7 to 10 As shown, the quick-change nut assembly includes a resilient ring washer 5, which is fixedly connected to one of the nuts 1 and the outer sleeve 4. The resilient ring washer 5 is provided with a resilient pawl 501, and the other of the nuts 1 and the outer sleeve 4 is provided with a plurality of ratchet teeth 408 for resilient engagement or disengagement with the resilient pawl 501.

[0066] like Figures 7 to 10 As shown, the quick-change nut assembly includes an elastic ring washer 5, which is disposed between the inner wall of the connecting section 120 and the third cavity 430. A mating groove 502 is provided on the inner wall of the elastic ring washer 5, which corresponds to the drive key 103, to fix the elastic ring washer 5 to the nut 1. An elastic pawl 501 is provided on the outer circumferential surface of the elastic ring washer 5, and multiple ratchet teeth 408 are spaced apart on the inner wall of the third cavity 430. The elastic pawl 501 is used to elastically engage or disengage with the ratchet teeth 408. The ratchet teeth 408 rotate relative to the elastic pawl 501 when the outer sleeve 4 rotates relative to the nut 1, thus producing a sound.

[0067] This invention's quick-change nut assembly enhances its self-locking function and provides audible feedback by incorporating an elastic ring washer 5. When the outer sleeve 4 rotates, the interaction between the ratchet 408 and the elastic pawl 501 not only accurately positions the outer sleeve 4 but also produces a "clicking" sound during tightening and loosening, alerting the operator to the current operating status. This helps the operator accurately judge the degree of locking of the quick-change nut assembly, improving operational safety and efficiency. It solves the problem of some existing quick-change nuts lacking clear feedback during operation, making it difficult for operators to determine whether the nut is fully locked or loosened, thus posing safety hazards during use.

[0068] Specifically, the elastic ring pad 5 includes an annular ring, wherein a protrusion is provided on the inner wall surface of the annular ring to form a mating groove 502, and the included angle between the two sides of the mating groove 502 is equal to the included angle between the two sides of the drive key 103; and / or, the first end of the elastic pawl 501 is fixedly connected to the annular ring, and the second end of the elastic pawl 501 is spaced apart from the annular ring so that the second end of the elastic pawl 501 is elastically movable in the direction of approaching or moving away from the annular ring, so that the elastic pawl 501 engages or disengages from the ratchet 408; and / or, the first end and the second end of the elastic pawl 501 along the circumference of the annular ring are both provided with a guide surface 503, the guide surface 503 is used to guide the ratchet 408 so that the ratchet 408 slides over the elastic pawl 501 and reciprocates relative to the elastic pawl 501.

[0069] The quick-change nut assembly of this utility model includes a pressure pad 8 and a second roller 9 disposed between the pressure pad 8 and the elastic ring pad 5; and / or, the second roller 9 and a flat washer 6 located between the elastic ring pad 5 and the second roller 9.

[0070] like Figures 11 to 14 As shown, the quick-change nut assembly includes: a pressure pad 8, which is located inside the third cavity 430; the nut 1 also includes a mounting section 130 inserted into the third cavity 430; the pressure pad 8 is sleeved on the side of the mounting section 130 that is located away from the second cavity 420 and is located outside the elastic ring pad 5 and the drive key 103; the diameter of the inner hole of the pressure pad 8 is larger than the outer diameter of the mounting section 130; the inner hole of the pressure pad 8 includes a first hole section 802 and a second hole section 803 connected sequentially in a direction away from the second cavity 420; the maximum diameter of the first hole section 802 is smaller than the minimum diameter of the second hole section 803; and a retaining spring 10, on which an annular mounting groove 106 is provided on the outer circumferential surface of the mounting section 130; the retaining spring 10 is installed in the annular mounting groove 106, and one end face of the retaining spring 10 contacts the bottom surface of the hole in the second hole section 803.

[0071] The quick-change nut assembly of this utility model, by setting pressure pad 8 and retaining spring 10, can effectively control the relative movement between outer sleeve 4 and nut 1, avoiding unnecessary relative sliding and dislodging during operation, ensuring that the components of the quick-change nut assembly can fit tightly when tightened, and can also separate quickly when loosened, ensuring the normal operation of each component of the quick-change nut assembly, and avoiding the impact on the self-locking and unlocking efficiency due to excessive axial movement between outer sleeve 4 and nut 1.

[0072] like Figure 3 As shown, the quick-change nut assembly also includes a plurality of second rollers 9, which are located within the third cavity 430 and spaced apart between the pressure pad 8 and the elastic ring pad 5.

[0073] The quick-change nut assembly of this utility model, by setting a second roller 9, is mainly to provide rolling friction between the pressure pad 8 and the elastic ring pad 5, reduce the wear caused by direct contact between the pressure pad 8 and the elastic ring pad 5, and extend the service life of the quick-change nut assembly; at the same time, it also plays a role in positioning and balancing, ensuring the stability of the outer sleeve 4 during rotation and avoiding vibration and noise caused by eccentricity.

[0074] like Figures 11 to 13 As shown, the pressure pad 8 is provided with an installation groove 801, and a plurality of second rollers 9 are disposed in the installation groove 801; and / or the first roller 2 and the second roller 9 are both spheres, and the outer diameter of the first roller 2 is larger than the outer diameter of the second roller 9.

[0075] The quick-change nut assembly of this utility model, by setting the mounting groove 801, plays a guiding and limiting role in the rolling of the second roller 9, ensuring the smooth movement of the second roller 9, further ensuring the stability of the outer sleeve 4 during rotation, and avoiding vibration and noise caused by eccentricity.

[0076] like Figure 3 , Figures 7 to 9 as well as Figure 15 and Figure 16 As shown, the outer peripheral surface of the pressure pad 8 includes a first outer peripheral surface segment 804 and a second outer peripheral surface segment 805 connected sequentially in a direction away from the second cavity 420. The maximum diameter of the first outer peripheral surface segment 804 is smaller than the minimum diameter of the second outer peripheral surface segment 805. The first outer peripheral surface segment 804 and the second outer peripheral surface segment 805 are connected by a first end face 806. A plurality of second rollers 9 are located between the first end face 806 and the elastic ring washer 5. And / or the quick-change nut assembly includes a flat washer 6, which is located inside the third cavity 430. The flat washer 6 is sleeved on the mounting section 130 and located between the elastic ring washer 5 and the plurality of second rollers 9. The inner diameter of the flat washer 6 is larger than the outer diameter of the mounting section 130.

[0077] The quick-change nut assembly of this utility model, by setting segmented pressure pads 8, can better adapt to the internal structure of the outer sleeve 4. The size difference between the first outer peripheral surface segment 804 and the second outer peripheral surface segment 805 provides a suitable rolling path for the second roller 9, ensuring its smooth rolling between the pressure pad 8 and the elastic ring pad 5. This not only reduces friction between the components, but also improves the overall stability of the quick-change nut assembly, making it suitable for tools that need to operate in complex environments.

[0078] The quick-change nut assembly of this utility model ensures the integrity and continuity of the raceway of the second roller 9 by setting a flat washer 6.

[0079] Specifically, the end face of the connecting section 120 away from the limiting section 110 is the second axial end face 102, and the flat washer 6 is also located between the second axial end face 102 and the second rolling element 9.

[0080] like Figures 3 to 16 As shown, a first sealing groove 407 is provided at the first end of the receiving cavity 400, and the quick-change nut assembly includes a first sealing ring 3, which is disposed between the first sealing groove 407 and the outer peripheral surface of the limiting section 110; and / or a second sealing groove 409 is provided at the second end of the receiving cavity 400, and the quick-change nut assembly includes a second sealing ring 7, which is disposed between the second sealing groove 409 and the second outer peripheral surface section 805.

[0081] The quick-change nut assembly of this utility model, by setting a first sealing ring 3 and a second sealing ring 7, can effectively resist the influence of harsh environments, prevent external impurities such as dust and water droplets from entering the quick-change nut assembly, protect its internal structure from pollution and corrosion, extend the service life of the quick-change nut assembly, ensure the long-term stable operation of the nut assembly, and reduce the failure rate caused by environmental factors; at the same time, it can also reduce noise during operation and improve the user's operating experience.

[0082] The tightening and loosening instructions for the quick-change nut assembly of this utility model are as follows:

[0083] 1. Tightening steps

[0084] Nut 1 is threadedly connected to the external threaded component through the internal threaded hole 107, ensuring that the quick-change nut assembly is in an unlocked state. At this time, the first roller 2 is located at the deepest position 402 of the rolling groove 401. The operator manually rotates the outer sleeve 4 to make it rotate relative to nut 1 towards the first circumferential contact position. As the outer sleeve 4 rotates, the first roller 2 rolls from the deepest position 402 to the shallowest position 403 of the rolling groove 401. Since the helix angle of the bottom surface of the rolling groove 401 is less than or equal to 8°, the first roller 2 can effectively convert the rotational force of the outer sleeve 4 into axial force. When the first roller 2 rolls, the tightening torque of the outer sleeve 4 is greater than the resistance of the elastic pawl 501 of the elastic ring washer 5 sliding on the ratchet 408 of the outer sleeve 4, and relative rotation will occur between the elastic pawl 501 and the ratchet 408. At this point, the nut will make a "clicking" sound to indicate to the operator that the quick-change nut assembly is being effectively tightened. When the outer sleeve 4 rotates to the first circumferential contact position where the drive key 103 and the drive groove 404 mutually limit and abut (i.e., the side 405 of the first limiting groove and the side 105 of the first limiting key abut), the first roller 2 also reaches the shallowest position 403 of the rolling groove 401 to transmit axial force and enhance the tightening effect between the internal threaded hole 107 and the external threaded part. Continuing to apply torque, using the cooperation between the drive groove 404 on the outer sleeve 4 and the drive key 103 on the nut 1, the outer sleeve 4 begins to transmit the tightening torque to the nut 1 to drive the nut 1 to rotate synchronously until the outer sleeve 4 and the nut 1 can no longer rotate. At this point, the quick-change nut assembly reaches the maximum tightening state and locks with the external threaded part.

[0085] 2. Loosening steps

[0086] The operator manually rotates the outer sleeve 4 in the reverse direction again, causing it to rotate relative to the nut 1 towards the second circumferential contact position. The first roller 2 rolls from the shallowest position 403 to the deepest position 402, a process requiring relatively little torque. The rolling of the first roller 2 reduces the axial force inside the quick-change nut assembly, gradually loosening the connection between the nut 1 and the outer sleeve 4. When the first roller 2 returns to the deepest position 402, the outer sleeve 4 rotates to the second circumferential contact position. At this point, the operator can easily continue to rotate the outer sleeve 4 in the reverse direction, causing the nut 1 to rotate synchronously in the reverse direction, thus easily removing it from the external thread without the need for additional tools. This is because the difference in depth between the shallowest position 403 and the deepest position 402 of the rolling groove 401 creates an axial gap between the nut 1 and the outer sleeve 4, eliminating the axial force from the first roller 2 on the nut 1, thus allowing the nut 1 to be easily removed from the external thread.

[0087] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0088] The quick-change nut assembly of this utility model includes: a nut 1 and an outer sleeve 4. The nut 1 includes an internal threaded hole 107 for threaded connection with an external threaded component, and the outer sleeve 4 is sleeved on the outside of the nut 1. One of the nut 1 and the outer sleeve 4 is provided with a drive key 103, and the other of the nut 1 and the outer sleeve 4 is provided with a drive groove 404 for the drive key 103 to be inserted. There is a circumferential length difference between the drive groove 404 and the drive key 103 extending circumferentially along the nut 1, so that the nut 1 and the outer sleeve 4 can rotate relative to each other until the drive key 103 and the drive groove 404 are mutually... The first or second circumferential contact position of the limiting contact; at least one of the nut 1 and the outer sleeve 4 is provided with a rolling groove 401, and the quick-change nut assembly also includes a first roller 2 movably disposed in the rolling groove 401; along the direction from the second circumferential contact position to the first circumferential contact position, the depth of the rolling groove 401 gradually decreases, so that when the outer sleeve 4 and the nut 1 are in the first circumferential contact position, the opposite sides of the first roller 2 abut against the nut 1 and the outer sleeve 4 respectively, so that the outer sleeve 4 and the nut 1 switch from a non-locking state to a self-locking state. In this way, the quick-change nut assembly of this utility model allows the nut 1 and the outer sleeve 4 to switch between self-locking and non-self-locking through the cooperation of the drive key 103, the drive groove 404, the rolling groove 401, and the first roller 2, so as to lock or unlock the relative position between the nut 1 and the external threaded part. Simply rotating the outer sleeve 4 allows the nut 1 to be easily tightened onto or removed from the external threaded part under the drive of the outer sleeve 4, without the need for additional tools, which greatly improves the operating efficiency and solves the problem that the quick-change nuts in the prior art are costly and have complicated use steps due to their complex structure.

[0089] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0090] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0091] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0092] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0093] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0094] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quick change nut assembly, characterized by, include: Nut (1) and outer sleeve (4), the nut (1) including an internal threaded hole (107) for threaded connection with an external threaded component, the outer sleeve (4) being fitted over the nut (1); One of the nut (1) and the outer sleeve (4) is provided with a drive key (103), and the other of the nut (1) and the outer sleeve (4) is provided with a drive groove (404) for the drive key (103) to be inserted. There is a circumferential length difference between the drive groove (404) and the drive key (103) extending along the circumference of the nut (1), so that the nut (1) and the outer sleeve (4) can rotate relative to each other to a first circumferential contact position or a second circumferential contact position where the drive key (103) and the drive groove (404) mutually limit and abut against each other. At least one of the nut (1) and the outer sleeve (4) is provided with a rolling groove (401), and the quick-change nut assembly further includes a first roller (2) movably disposed in the rolling groove (401); the depth of the rolling groove (401) gradually decreases along the direction from the second circumferential contact position to the first circumferential contact position, so that when the outer sleeve (4) and the nut (1) are in the first circumferential contact position, the opposite sides of the first roller (2) abut against the nut (1) and the outer sleeve (4) respectively, so that the outer sleeve (4) and the nut (1) switch from a non-locking state to a self-locking state.

2. The quick-change nut assembly according to claim 1, characterized in that, The drive key (103) has a first limiting key side (105) and a second limiting key side (104) respectively at both ends along the circumference of the nut (1), and the circumferential distance between the first limiting key side (105) and the second limiting key side (104) is the first circumferential length. The drive groove (404) is provided with a first limiting groove side surface (405) and a second limiting groove side surface (406) at both ends of the circumferential direction of the nut (1), and the circumferential distance between the first limiting groove side surface (405) and the second limiting groove side surface (406) is the second circumferential length. Wherein, the first circumferential length is less than the second circumferential length, and the remaining circumferential length difference after subtracting the first circumferential length from the second circumferential length corresponds to the angle of rotation of the outer jacket (4) relative to the nut (1) when switching from the non-self-locking state to the self-locking state.

3. The quick change nut assembly of claim 1, wherein, The nut (1) includes a connecting section (120), and the outer sleeve (4) includes a receiving cavity (400) for accommodating the nut (1); wherein, The cavity (400) is provided with the drive groove (404), and the connecting section (120) is provided with the drive key (103) on its outer peripheral surface; or, the cavity (400) is provided with the drive key (103), and the connecting section (120) is provided with the drive groove (404).

4. The quick change nut assembly of claim 1, wherein, The nut (1) includes a limiting section (110) and a connecting section (120) connected together, wherein the outer diameter of the limiting section (110) is larger than the outer diameter of the connecting section (120); the internal threaded hole (107) passes through the limiting section (110) and the connecting section (120); the outer sleeve (4) includes a receiving cavity (400) for accommodating the nut (1); wherein, The rolling groove (401) is disposed within the receiving cavity (400) of the outer sleeve (4) and is provided on the end face of the limiting section (110) near the connecting section (120); and / or, The rolling groove (401) is disposed on the limiting section (110) and located on the end face of the limiting section (110) near the connecting section (120).

5. The quick-change nut assembly according to claim 1, characterized in that, The rolling groove (401) is a partial helical groove extending circumferentially along the nut (1) or the outer sleeve (4), and the helix angle of the rolling groove (401) is less than or equal to 8°, so that the two ends of the extension direction of the rolling groove (401) are the deepest position (402) and the shallowest position (403), respectively; and / or, The first rolling body (2) is a metal sphere, and the cross-section of the rolling groove (401) is a part of a circle. The circle is correspondingly arranged with the metal sphere, and the maximum depth of the rolling groove (401) is less than the diameter of the metal sphere.

6. The quick change nut assembly of claim 1, wherein, The quick-change nut assembly includes an elastic ring washer (5), which is fixedly connected to one of the nut (1) and the outer sleeve (4). The elastic ring washer (5) is provided with an elastic pawl (501), and the other of the nut (1) and the outer sleeve (4) is provided with a plurality of ratchet teeth (408) for elastically engaging or disengaging with the elastic pawl (501).

7. The quick change nut assembly of claim 1, wherein, The nut (1) includes a limiting section (110) and a connecting section (120) connected together; the internal threaded hole (107) passes through the limiting section (110) and the connecting section (120); the outer sleeve (4) includes a receiving cavity (400) for accommodating the nut (1), the receiving cavity (400) includes a first cavity (410), a second cavity (420) and a third cavity (430) connected in sequence, the first cavity (410) and the second cavity (420) are respectively provided corresponding to at least a portion of the limiting section (110) and the connecting section (120), the outer diameter of the second cavity (420) is smaller than the outer diameter of the first cavity (410) and the outer diameter of the third cavity (430); wherein, the rolling groove (401) is provided on the bottom surface of the first cavity (410), and the driving groove (404) is provided on the inner wall surface of the second cavity (420).

8. The quick change nut assembly of claim 7, wherein, The quick-change nut assembly includes an elastic ring washer (5), which is disposed between the connecting section (120) and the inner wall surface of the third cavity (430); The inner wall surface of the elastic ring pad (5) is provided with a mating groove (502), which is correspondingly provided with the drive key (103) so that the elastic ring pad (5) and the nut (1) are fixedly connected. The elastic ring pad (5) is provided with an elastic pawl (501) on its outer peripheral surface, and a plurality of ratchet teeth (408) are provided at intervals on the inner wall surface of the third cavity (430). The elastic pawl (501) is used to elastically engage or disengage with the ratchet teeth (408). The ratchet (408) rotates relative to the elastic pawl (501) when the outer sleeve (4) rotates relative to the nut (1) to produce a sound.

9. The quick change nut assembly of claim 8, wherein, The elastic ring pad (5) includes an annular ring, wherein, The first end of the elastic pawl (501) is fixedly connected to the annular ring, and the second end of the elastic pawl (501) is spaced apart from the annular ring, so that the second end of the elastic pawl (501) is elastically movable in a direction close to or away from the annular ring, so that the elastic pawl (501) engages or disengages from the ratchet tooth (408); and / or, The elastic pawl (501) has a guide surface (503) at both its first and second ends along the circumference of the annular ring. The guide surface (503) is used to guide the ratchet tooth (408) so that the ratchet tooth (408) slides over the elastic pawl (501) and reciprocates relative to the elastic pawl (501).

10. The quick change nut assembly of claim 6, wherein, The quick-change nut assembly includes: Pressure pad (8) and a second roller (9) disposed between the pressure pad (8) and the elastic ring pad (5); and / or, The second roller (9) and the flat washer (6) located between the elastic ring pad (5) and the second roller (9).

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