Quick-change nut

Abstract

The invention discloses a quick-change nut, and belongs to the technical field of part fastening equipment. The nut comprises a nut body, internal threads are arranged on the nut body, the nut further comprises a locking piece, a driving assembly, a connecting assembly and an elastic piece, the driving assembly comprises a driving structure and a sliding structure, the connecting assembly comprises a connecting piece and a pressing piece, and the connecting piece is connected with the locking piece. The driving assembly drives the locking piece to rotate, the quick-change nut is locked and loosened under the matching action of the locking assembly and the connecting assembly, the nut is firmly locked and is not prone to loosening during vibration, the position of the sliding piece in the limiting part is changed under the action of axial extrusion force of the quick-change nut, and the quick-change nut is locked and loosened. The axial extrusion force for extruding the threads of the quick-change nut is quickly reduced, so that the nut can be loosened without adding other structures or auxiliary tools, the nut can be quickly loosened by an operator through manual operation, the operation is convenient, and the nut cost is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of parts fastening equipment, and more particularly, relates to a quick-change nut. Background Art

[0002] A nut is a device that can be screwed by hand onto a machine (such as an angle grinder, etc.) to clamp the tool.

[0003] When the machine is in use, the nut tends to self-tighten. When it needs to be disassembled, due to the large thread extrusion force, ordinary nuts need to be loosened with the help of auxiliary disassembly tools. It is difficult to remove the nut from the screw without using tools, which is inconvenient to operate and the steps for loosening the nut are cumbersome. Summary of the Invention

[0004] The present invention aims to solve the technical problems existing in the prior art and provides a quick-change nut.

[0005] In order to solve the above technical problems, the present invention includes a nut body, the nut body is provided with an internal thread, and further includes:

[0006] A locking piece, which is connected to the nut body and drives the nut body to rotate synchronously;

[0007] A drive assembly comprising a drive structure and a sliding structure. The drive structure can drive the sliding structure to move along the axis of the nut body when the drive structure rotates relative to the nut body. The drive structure comprises a drive sleeve disposed on the outer peripheral side of the nut body. The sliding structure comprises a sliding member. The locking member is connected to a limiting portion that can accommodate the circumferential movement of the sliding member. The limiting portion is a limiting groove structure with an axial height difference.

[0008] The connecting assembly includes a connecting piece and a pressing piece. The connecting piece is connected to the locking piece. When the driving assembly rotates, the connecting piece can be driven to move along the axis of the nut body. The end of the connecting piece abuts against the sliding piece. The pressing piece has axial freedom of movement relative to the nut body.

[0009] The elastic member is sleeved on the connecting member and can press the connecting member to move the connecting member in a direction away from the pressing member.

[0010] Preferably, the locking member is a locking structure that is integrally provided with the nut body or separately connected, the limiting portion and the nut body maintain a relatively fixed state, the limiting portion is integrally provided with the nut body, or the limiting portion is an independent component fixedly connected to the nut body.

[0011] Preferably, a driving component is connected to the driving sleeve and the locking member, and the driving component includes a driving part and a driving matching part, and there is a driving angle difference between the driving part and the driving matching part; the driving part is arranged on the driving sleeve, and the driving matching part is arranged on the locking member, and the driving part and the driving matching part are connected by a concave-convex engagement or a driving connection.

[0012] Preferably, the driving portion is arranged on the inner circumference of the driving sleeve, and the driving portion includes a first driving portion and a second driving portion. The first driving portion includes a pressing claw, and the pressing claw is a pressing claw structure with an inclined angle arranged along the circumference of the driving sleeve.

[0013] The driving fitting part includes a guide hole arranged along the axial direction of the locking member and a connecting fitting part arranged along the circumferential direction of the locking member. The second driving part and the connecting fitting part can be connected by a concave-convex engagement or a driving connection. The connecting member is arranged in the guide hole and the ends are respectively connected to the clamping claw and the sliding member.

[0014] Preferably, the pressing claw is provided with a positioning countersunk hole which is concave along the axis. As the driving sleeve rotates, the end of the connecting piece abuts against the pressing claw and the positioning countersunk hole alternately.

[0015] Preferably, the locking member includes a locking disk, which is sleeved on the outer periphery of the nut body, the first end of the connecting member abuts against the first driving portion, and the second end of the connecting member is disposed in the limiting portion and connected to the sliding member;

[0016] The limiting portion is a sliding groove arranged along the circumference of the locking disk, and the sliding member is movably arranged in the sliding groove.

[0017] Preferably, both circumferential ends of the sliding groove are R-arc structures or inclined surfaces, the diameter of the R-arc structure at the end of the sliding groove is larger than the diameter of the sliding member or the inclined surface angle at the end of the sliding groove is larger than 5 degrees.

[0018] Preferably, the locking piece is arranged on the outer periphery of the nut body, and a spiral lifting structure is provided between the outer peripheral side of the locking piece and the cylinder body of the driving sleeve. The spiral lifting structure is a spiral groove arranged on the outer peripheral side of the locking piece or the driving sleeve body, and a sliding part that is adapted to be connected to the spiral groove is correspondingly provided on the other component.

[0019] The spiral groove includes an upper ball groove portion and a lower ball groove portion, and a lifting portion therebetween, wherein the upper ball groove portion is higher than the lower ball groove portion;

[0020] Preferably, the sliding part can be directly fixedly connected to the driving sleeve or a sliding driving part can be connected to the driving sleeve. The sliding part is connected to the driving sleeve through the sliding driving part to realize synchronous movement of the sliding part and the driving sleeve. The spiral groove is arranged along the circumference of the locking piece, and the spiral groove is a stepped limiting groove structure with an axial height difference. The sliding part can drive the driving sleeve to rotate circumferentially along the spiral groove. The sliding part slides circumferentially in the spiral groove to realize the increase or decrease of the axial distance between the locking piece and the driving sleeve.

[0021] Preferably, a pressing surface is provided on the driving sleeve, and the pressing surface is an inner annular surface structure provided on the upper end surface of the driving sleeve, and the lower end surface of the pressing surface is provided on the upper end of the locking member and abuts against the upper end of the connecting member.

[0022] Preferably, a limiting member is connected to the nut body, the limiting member and the locking member are integrally arranged or separately connected, the limiting member is arranged at the end of the connecting member, the limiting portion is a sliding groove arranged on the limiting member, and the sliding groove is a concave arc groove structure arranged along the circumference of the limiting member and with uneven depth distribution, wherein the groove depth in the middle is greater than the groove depth at both ends;

[0023] The upper end surface of the pressing member is provided with an annular groove adapted to the sliding groove. The sliding member is arranged in a diameter-changing space formed by the sliding groove and the annular groove. The sliding member can perform circumferential sliding in the diameter-changing space.

[0024] Preferably, the sliding part includes several groups of sliding steel balls, each group of sliding steel balls includes two sliding steel balls, the number of groups of sliding steel balls matches the number of connecting parts, the two sliding steel balls are arranged in the limiting part and respectively arranged on both sides of the end of the connecting part, and the sliding steel balls abut against the end of the connecting part.

[0025] Preferably, the connecting member is a variable diameter rod structure arranged along the axial direction of the locking member, and the connecting member includes a first end face and a second end face. The first end face and the second end face are both variable cross-section structures with inclined surfaces or arc structures with high and low surfaces. The first end face and the second end face are respectively arranged at the two ends of the connecting member, the first end face is connected to the drive sleeve, and the second end face is arranged close to the clamping member.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention drives the locking part to rotate through the driving component, and the quick-change nut completes the locking and loosening of the nut under the adaptation action of the locking component and the connecting component. Not only can the nut be locked firmly and not easy to loosen during vibration, but also under the action of the axial extrusion force of the quick-change nut, the sliding part moves in the locking part, the axial relative displacement of the sliding part and the connecting part changes, and the position of the sliding part in the limiting part changes, so that the axial extrusion force of the quick-change nut thread is rapidly reduced, so there is no need to add other structures or use auxiliary tools to loosen the nut. The operator can quickly loosen the nut by hand, which is easy to operate and reduces the cost of quick-change nuts. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 Schematic diagram of the explosion of the quick-change nut structure of Example 1 of the present invention Figure 1 ;

[0030] Figure 2 This is an axial side cross-sectional view of the quick-change nut according to embodiment 1 of the present invention;

[0031] Figure 3 This is a structural diagram of the nut body of Example 1 of the present invention;

[0032] Figure 4 Schematic diagram of the structure of the locking disk of Example 1 of the present invention Figure 1 ;

[0033] Figure 5 Schematic diagram of the structure of the locking disk of Example 1 of the present invention Figure 2 ;

[0034] Figure 6 This is a schematic structural diagram of a driving sleeve according to embodiment 1 of the present invention;

[0035] Figure 7 Schematic diagram of the explosion of the quick-change nut structure of Example 1 of the present invention Figure 2 ;

[0036] Figure 8 This is a schematic structural diagram of a connector according to embodiment 1 of the present invention;

[0037] Figure 9 This is a schematic structural diagram of a jacket according to Example 1 of the present invention;

[0038] Figure 10 This is a schematic structural diagram of a compression pad according to embodiment 1 of the present invention;

[0039] Figure 11 This is an axial side cross-sectional view of the locking nut in the unlocked state according to Example 1 of the present invention;

[0040] Figure 12 This is an axial side cross-sectional view of the locking nut in a locked state according to embodiment 1 of the present invention;

[0041] Figure 13 This is an exploded schematic diagram of the quick-change nut structure of Example 2 of the present invention;

[0042] Figure 14 This is an axial side cross-sectional view of a quick-change nut according to embodiment 2 of the present invention;

[0043] Figure 15 This is a schematic diagram of the three-dimensional structure of the nut body of Example 2 of the present invention;

[0044] Figure 16 This is a schematic diagram of the main structure of the nut body of Example 2 of the present invention;

[0045] Figure 17 This is a schematic structural diagram of a driving sleeve according to embodiment 2 of the present invention;

[0046] Figure 18 Schematic diagram of the three-dimensional structure of the limiting member of embodiment 2 of the present invention Figure 1 ;

[0047] Figure 19 This is a schematic structural diagram of a connecting piece according to embodiment 2 of the present invention;

[0048] Figure 20 Schematic diagram of the three-dimensional structure of the limiting member of embodiment 2 of the present invention Figure 2 ;

[0049] Figure 21 This is a schematic structural diagram of the compression pad according to embodiment 2 of the present invention.

[0050] Explanation of symbols in the figure:

[0051] 1. Nut body; 101. Top surface; 102. Jacket connection surface; 103. Locking connection surface; 104. Driving flat; 105. Retaining ring groove; 11. Main body; 12. Guide adjustment part; 121. Spiral groove; 2. Jacket; 3. Driving sleeve; 31. First driving part; 32. Second driving part; 33. Driving claw; 34. Pressing claw; 35. Positioning countersunk hole; 36. Rotating cylinder; 37. Rotating cylinder cover; 38. Sliding part receiving groove; 39. Pressing surface; 4. Locking piece; 41. Limiting part; 411. Sliding groove; 42. Locking disk; 43. Rotating connection structure; 44, guide hole; 45, annular limiting surface; 46, driving groove; 5, sliding member; 51, sliding steel ball; 6, connecting member; 61, first end face; 62, second end face; 63, sliding surface; 64, annular plate; 7, pressing member; 71, pressing pad; 72, concave annular surface; 73, sealing ring groove; 74, annular groove; 8, elastic member; 81, elastic pad; 9, retaining spring; 10, sealing ring; 13, limiting member; 131, limiting portion; 132, sliding groove; 133, limiting hole; 14, sliding portion; 141, driving steel ball. DETAILED DESCRIPTION

[0052] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0053] See also Figure 1 The present invention provides a quick-change nut, which includes a nut body 1, the nut body 1 is provided with an internal thread, and further includes:

[0054] The locking member 4 is connected to the nut body 1 and drives the nut body 1 to rotate synchronously;

[0055] The drive assembly includes a drive structure and a sliding structure. When the drive structure rotates relative to the nut body 1, it can drive the sliding structure to move along the axis of the nut body. The drive structure includes a drive sleeve 3 arranged on the outer peripheral side of the nut body 1. The sliding structure includes a sliding member 5. The locking member 4 is connected to a limiting portion 41 that can accommodate the circumferential movement of the sliding member 5. The limiting portion 41 is a limiting groove structure arranged along the circumference of the locking member 4 and has an axial height difference.

[0056] The connecting assembly includes a connecting member 6 and a pressing member 7. The connecting member 6 is connected to the locking member 4. When the driving assembly rotates, the connecting member 6 can be driven to move along the axis of the nut body 1. The end of the connecting member 6 abuts against the sliding member 5. The pressing member 7 has axial freedom of movement relative to the nut body 1.

[0057] The elastic member 8 is sleeved on the connecting member 6 , and the elastic member 8 can press the connecting member 6 to move the connecting member 6 in a direction away from the pressing member 7 .

[0058] The present invention drives the locking member 4 to rotate through the driving assembly, and the quick-change nut completes the locking and loosening of the nut under the adaptation of the locking assembly and the connecting assembly, not only making the nut firmly locked and not easy to loosen during vibration, but also under the action of the axial extrusion force of the quick-change nut, the sliding member 5 moves in the locking member 4, and the axial relative displacement of the sliding member 5 and the connecting member 6 changes, and the position of the sliding member 5 in the limiting portion 41 changes, so that the axial extrusion force of the quick-change nut thread is rapidly reduced, so there is no need to add other structures or use auxiliary tools to loosen the nut. The operator can quickly loosen the nut by hand, which is easy to operate and reduces the cost of quick-change nuts.

[0059] Specific implementation methods of different embodiments of the quick-change nut of the present invention are as follows.

[0060] Example 1

[0061] In this embodiment, Figure 1 、 Figure 2As shown, the drive structure further includes an outer sleeve 2, which is disposed on the outer circumference of the drive sleeve 3 and has an interference fit with the drive sleeve 3. A pressing member 7 is disposed at the end of the nut body 1 to limit the axial displacement of the locking assembly. The drive assembly and the locking member 4 are both disposed between the nut body 1 and the pressing member 7. The nut body 1 passes through the drive assembly and the locking member 4 in sequence, and the end portion is connected to the pressing member 7.

[0062] Specifically, such as Figure 3 As shown, the nut body 1 is a hollow threaded shaft structure with an internal thread, which is connected to an external connector such as a screw by threaded cooperation to achieve the fastening of the workpiece. In the axial direction, the diameter of the internal threaded through hole remains consistent to form a uniform inner hole structure; while the diameter of the external contour presents a segmented change feature, the outer diameter of each segment is different, and the connection ends of different outer diameters have a stepped transition.

[0063] Furthermore, Figure 2 、 Figure 3 As shown, the nut body 1 is an integrally molded component, including a top surface 101 located at the end, a sleeve connecting surface 102 connected to the inner circumference of the sleeve 2, and a locking connecting surface 103. A driving flat 104 is provided on the sleeve connecting surface 102. The outer diameter of the top surface 101 is larger than the outer diameter of the sleeve connecting surface 102, and the sleeve 2 is sleeved on the nut body 1, the inner circumference of the sleeve 2 is connected to the sleeve connecting surface 102 of the nut body 1, and the top surface 101 of the nut body 1 is in contact with the outer surface of the sleeve 2; there are multiple driving flats 104 and they are evenly distributed along the circumference of the sleeve connecting surface 102, the locking connecting surface 103 is a smooth circular surface structure, and the locking connecting surface 103 is adjacent to the driving flat 104. The nut body 1 is connected to the locking member 4 through the driving flat 104 and the locking connecting surface 103, and the locking member 4 drives the nut body 1 to rotate.

[0064] In this embodiment, a retaining spring groove 105 is provided on the locking connection surface 103. The retaining spring groove 105 is a circular groove structure evenly distributed along the circumference of the nut body 1. A retaining spring 9 is provided at the end of the nut body 1. The retaining spring 9 is clamped in the retaining spring groove 105 of the nut body 1. The end of the retaining spring 9 is in contact with the clamping piece 7. The retaining spring 9 can block the clamping piece 7 sleeved on the outer periphery of the end of the nut body 1, thereby assembling the various components of the quick-change nut into one.

[0065] The nut body 1 exhibits a cam-like structure with a circular cross-section. While the internal aperture of the nut body 1 is uniform, the outer diameter of the nut body 1 varies, dividing it into multiple segments along the axial direction. Each segment has a different outer diameter. Along the axial direction of the nut body 1, the top surface 101, the outer sleeve connection surface 102, the drive flat 104, the locking connection surface 103, and the retaining ring groove 105 are arranged sequentially from top to bottom. These structures on the nut body 1 enable stable assembly and rapid connection with the other components of the quick-change nut, collaborating to clamp the workpiece.

[0066] In this embodiment, Figure 4 As shown, the locking member 4 includes a locking disk 42, which is a disc-shaped connection structure with an axial through hole inside. The locking disk 42 is sleeved on the locking connection surface 103 of the nut body 1 and the outer periphery of the driving flat 104, and the locking disk 42 rotates synchronously with the nut body 1.

[0067] Specifically, such as Figure 3-Figure 5 As shown, in order to limit the rotation of the locking disk 42 relative to the nut body 1, the inner circumference of the locking disk 42 is provided with a rotating connection structure 43 that is adapted to the driving flat 104 of the nut body 1. The rotating connection structure 43 is a polygonal flat clamping structure that is adapted to the driving flat 104, and the driving flat 104 and the rotating connection structure 43 are mutually matching flat-flat connection structures or key-keyway connection structures. The locking disk 42 is engaged with the corresponding structure on the nut body 1, thereby connecting the locking disk 42 and the nut body 1 as a whole. The locking disk 42 can drive the nut body 1 to rotate for tightening the workpiece.

[0068] The locking disk 42 is provided with a guide portion, the connecting member 6 is connected to the guide portion, the limiting portion 41 is provided at the axial end of the guide portion, the connecting member 6 is connected to the sliding member 5 through the guide portion, and the pressing member 7 is connected to the connecting member 6 and the sliding member 5.

[0069] Specifically, the guide portion is a guide hole 44 axially arranged along the locking disk 42. The guide hole 44 is arranged at the axial upper end of the limiting portion 41, and the guide hole 44 is coaxially arranged with the limiting portion 41 at the lower end. The guide hole 44 is communicated with the limiting portion 41; the connecting member 6 is arranged in the guide hole 44, and the lower end of the connecting member 6 passes through the guide hole 44 and is connected to the sliding member 5 in the limiting portion 41, and the upper end of the connecting member 6 is in contact with and connected to the driving portion of the driving sleeve 3.

[0070] In this embodiment, the guide hole 44 is a circular through-hole structure with a stepped structure of varying diameter, with an upper diameter greater than a lower diameter. An axial stopper is provided at the junction of the upper and lower holes to limit the axial displacement of the connector 6. The axial stopper is an annular stopper surface 45, which engages the connector 6 via the protruding annular stopper surface 45, limiting the axial displacement of the connector 6. The axial length of the guide hole 44 is greater than the length of the connector 6, allowing the end of the connector 6 to be located at the outer end of the guide hole 44, so that the end of the connector 6 is connected to the drive sleeve 3.

[0071] Furthermore, in this embodiment, a total of four guide holes 44 are provided along the circumferential direction of the locking disk 42. The four guide holes 44 are evenly distributed on the outer peripheral side of the rotating connection structure 43 of the locking disk 42. The number of guide holes 44 matches the number of connecting parts 6. Through the cooperation of the various components, stable driving of the components is achieved, thereby achieving the clamping of the locking nut workpiece.

[0072] In this embodiment, Figure 4 、 Figure 5 As shown, the limiting portion 41 is a limiting structure arranged along the circumference of the locking member 4 and having an axial height difference. A limiting portion 41 is provided at the lower portion of each guide hole 44, and the lower end of the connecting member 6 is provided in the limiting portion 41. The limiting portion 41 is provided at the lower portion of the locking disk 42 and the four limiting portions 41 are evenly distributed along the circumference of the lower portion of the locking disk 42. The sliding member 5 is movably provided in the limiting portion 41, and the sliding member 5 can move circumferentially in the limiting portion 41.

[0073] Specifically, the limiting portion 41 is a sliding groove 411 arranged along the circumference of the locking disk 42. The circumferential curvature of the sliding groove 411 matches the circumferential curvature of the locking disk 42, and the circumferential size of the sliding groove 411 is larger than the diameter of the guide hole 44; the sliding groove 411 is arranged on the outer periphery of the through hole in the middle of the locking disk 42, and the sliding groove 411 is an annular arc groove structure adapted to the sliding member 5. The sliding groove 411 serves as a sliding raceway for the sliding member 5. The sliding member 5 can slide circumferentially in the sliding groove 411 but cannot move radially.

[0074] Furthermore, the number of sliding grooves 411 matches the number of connectors 6. The locking disk 42 is provided with a total of four sliding grooves 411, which are evenly distributed along the circumference of the locking disk 42. As the sliding member 5 slides, it can contact different axial locations of the connector 6, causing the axial displacement of the connector 6 to change.

[0075] In this embodiment, the sliding groove 411 can limit the movement trajectory of the sliding member 5, allowing the sliding member 5 to move in the direction of the sliding groove 411, thereby preventing the sliding member 5 from deflecting or shaking during movement. The sliding groove 411 has a symmetrical structure, with both circumferential ends of the sliding groove 411 having an R-arc structure or an inclined surface structure along its circumference. When the ends of the sliding groove 411 have an R-arc structure, the diameter of the R-arc structure is greater than the diameter of the sliding member; when the ends of the sliding groove 411 have an inclined surface structure, the angle of the inclined surface is greater than 5 degrees. By providing a concave arc or inclined surface structure at the ends of the sliding groove 411 to increase the contact area, the guiding effect thereof can not only avoid rigid collision and reduce impact when the sliding member 5 moves to the groove end, but also prevent the sliding member 5 from being wedged and stuck due to the end structure, allowing the sliding member 5 to move smoothly and ensuring smooth reciprocating motion.

[0076] Furthermore, as a preferred embodiment of the present invention, the limiting portion 41 maintains a relatively fixed state with the nut body 1 , the limiting portion 41 and the nut body 1 are integrally provided, or the limiting portion 41 is an independent component fixedly connected to the nut body 1 .

[0077] In this embodiment, a driving component is connected to the driving sleeve 3 and the locking member 4, and the driving component includes a driving part and a driving matching part. There is a driving angle difference between the driving part and the driving matching part; the driving part is arranged on the driving sleeve 3, and the driving matching part is arranged on the locking member 4. The driving part and the driving matching part are connected by a concave-convex engagement or a driving connection. The driving sleeve 3 can rotate synchronously or relatively with the locking member 4 through the driving component.

[0078] Specifically, such as Figure 4-Figure 6 As shown, the driving part is arranged on the inner circumference of the driving sleeve 3, and the driving part includes a first driving part 31 and a second driving part 32. The first driving part 31 is arranged on the inner circumference of the driving sleeve 3 and is matched with the upper first end of the connecting member 6. The second driving part 32 is arranged on the upper inner circumference of the driving sleeve 3. The second driving part 32 and the driving matching part can be detachably connected by means of concave-convex engagement or drive connection.

[0079] In this embodiment, the first driving part 31 includes a clamping claw 34, which is a curved clamping claw structure with an arc arranged along the circumference of the driving sleeve 3; the second driving part 32 is a driving claw 33 arranged on the inner circumference of the driving sleeve 3, and the driving matching part is arranged on the upper outer periphery of the locking disk 42. The driving matching part includes a guide hole 44 arranged axially along the locking member 4 and a connecting matching part arranged circumferentially along the locking member 4. The driving claw 33 and the connecting matching part can be connected by a concave-convex engagement or a driving connection. The connecting member 6 is arranged in the guide hole 44 and the ends are respectively connected to the clamping claw 34 and the sliding member 5.

[0080] Furthermore, the connecting and fitting portion is a driving groove 46 provided on the locking disk 42, and the driving groove 46 is matched and connected with the driving claw 33, and there are four of them, which are evenly distributed along the circumference of the locking disk 42 and the driving sleeve 3; the driving groove 46 is provided on the outer peripheral side of the locking disk 42, and the driving groove 46 and the guide holes 44 on the locking disk 42 are alternately arranged, and the driving groove 46 is provided between the two adjacent guide holes 44 in the circumferential direction.

[0081] Furthermore, when the connecting fitting portion is a protruding structure, the corresponding second driving portion 32 is a groove structure that matches the shape of the protruding structure; when the connecting fitting portion is a groove structure, the corresponding second driving portion 32 is a protruding structure that matches the shape of the groove structure; when the connecting fitting portion and the corresponding second driving portion 32 are drive connections, the two are respectively mutually adapted driving claws, driving flats or other engaging structures.

[0082] Furthermore, the matching cross-section of the connecting portion and the second driving portion 32 may be rectangular, circular, trapezoidal, polygonal, or the like.

[0083] Furthermore, as a preferred embodiment of the present invention, the number of drive grooves 46 matches the number of drive claws 33 on the drive sleeve 3, the number of guide holes 44 matches the number of connectors 6, and the specific number of drive grooves 46 and guide holes 44 can be adapted and adjusted according to actual usage requirements.

[0084] Furthermore, as a preferred embodiment of the present invention, the locking member 4 provided on the quick-change nut can be a detachable fixed structure separated from the nut body 1 or a locking disk or other locking structure integrally processed and set with the nut body 1. The locking member 4 is provided on the outer periphery of the nut body 1 to achieve synchronous rotation of the locking member 4 and the nut body 1.

[0085] In this embodiment, Figure 1 、 Figure 7 As shown, the sliding member 5 arranged in the sliding groove 411 is a sliding steel ball 51, and two sliding steel balls 51 are arranged in each sliding groove 411, and the two sliding steel balls 51 are respectively arranged on both sides of the end of the connecting member 6, and each two sliding steel balls 51 form a group and are arranged in the sliding groove 411 of the locking plate 42. The number of groups of sliding steel balls 51 matches the number of connecting members 6.

[0086] Specifically, since the two sliding steel balls 51 are symmetrically arranged on the left and right sides of the connecting member 6, the two sliding steel balls 51 are separated by the connecting member 6, and the sliding steel balls 51 are abutted against the end of the connecting member 6, the two sliding steel balls 51 are arranged along the same circumference of the sliding groove 411. When the sliding steel balls 51 are squeezed, they can move from the middle to the end of the sliding groove 411. Since the end of the sliding groove 411 is provided with an R-arc or inclined surface structure, there is a height difference between the high and low ends of the end. When the external position of the steel ball changes, due to the height difference, the sliding steel ball 51 can be made to contact different axial positions of the connecting member 6, thereby adjusting the locking state of the locking nut.

[0087] In this embodiment, Figure 1 、 Figure 2 As shown, the connecting member 6 is a variable diameter rod structure arranged along the axial direction of the locking disk. The four connecting members 6 are evenly distributed along the circumference of the locking disk 42. They are arranged in the guide hole 44. The upper end of the connecting member 6 is connected to the drive sleeve 3, and the lower end of the connecting member 6 is in contact and connected with the two sliding steel balls 51 in the drive groove 46.

[0088] Specifically, such as Figure 8 As shown, the connecting member 6 is a pin-like structure, and the connecting member 6 includes a first end face 61 and a second end face 62. The first end face 61 and the second end face 62 are both variable-section structures with inclined or arc-shaped structures having high and low surfaces. The first end face 61 and the second end face 62 are respectively arranged at the two ends of the connecting member 6, wherein the first end face 61 is arranged at the upper end of the connecting member 6, the first end face 61 is connected to the drive sleeve 3, and the second end face 62 is arranged at the lower end of the connecting member 6, the second end face 62 is arranged close to the clamping member 7, and the side of the second end face 62 is connected to the sliding steel ball 51.

[0089] In this embodiment, the first end face 61 of the upper end of the connecting member 6 is an arc spherical structure, the lower end of the connecting member 6 is provided with a conical structure, the second end face 62 is an annular inclined surface structure with a taper, and a sliding surface 63 is provided between the first end face 61 and the second end face 62. The middle area between the upper end and the lower end of the connecting member 6 is a cylindrical structure, and the sliding surface 63 is provided on the outer peripheral surface of the cylindrical structure. The upper and lower dimensions are consistent, and the radial dimension of the sliding surface 63 is greater than the minimum radial dimension of the second end face 62.

[0090] Furthermore, Figure 4 、 Figure 8As shown, the connecting member 6 is provided with a limiting fitting portion that is adapted to be connected to the annular limiting surface 45 of the locking disk 42. The limiting fitting portion is arranged between the first end face 61 and the sliding surface 63. The limiting fitting portion is an annular plate 64 extending radially outward along the connecting member 6. The outer diameter of the annular plate 64 is adapted to the outer diameter of the annular limiting surface 45 on the locking disk 42. The annular plate 64 is arranged in the upper area of ​​the guide hole 44 of the locking disk 42. Axial limitation is achieved by the cooperation between the annular plate 64 and the annular limiting surface 45, so that the connecting member 6 can move axially within the limited range of the guide hole 44 without axial deviation.

[0091] Furthermore, in this embodiment, the annular plate 64 can also be a circular ring surface structure at the bottom of the first end face 61 on the connecting member 6. The hemispherical size of the first end face is enlarged and set to the same as the radial size of the annular plate, so that the annular plate 64 at this time is combined with the circular ring surface at the bottom of the first end face 61, the upper part of the first end face 61 is connected to the drive sleeve 3, and the lower part of the first end face 61 is connected to the elastic member 8.

[0092] Furthermore, Figure 2 As shown in FIG. 1 , as a preferred embodiment of the present invention, an elastic member 8 is sleeved on the connecting member 6 , and the connecting member 6 can compress the elastic member 8 so that the connecting member 6 moves relative to the elastic member 8 in a direction away from the pressing member 7 .

[0093] Specifically, such as Figure 1 、 Figure 2 As shown, the elastic member 8 is an elastic pad 81 sleeved on the cylindrical structure in the middle of the connecting member 6. The elastic pad 81 is an annular elastic washer structure. The axial lower end of the elastic pad 81 is connected to an axial limiting portion that limits its axial displacement. The axial limiting portion is an annular limiting surface 45 arranged in the guide hole 44 of the locking disk 42. The lower end surface of the elastic pad 81 is in contact with the annular limiting surface 45 of the locking disk 42, and the axial direction of the elastic pad 81 is limited and supported by the annular limiting surface 45. The upper end face of the elastic pad 81 is in contact with the lower end face of the annular plate 64, and the inner diameter of the elastic pad 81 matches the middle size of the connecting member 6. The outer diameter of the elastic pad 81 is smaller than the outer diameter of the annular plate 64, so that the elastic pad 81 is clamped between the annular plate 64 and the annular limiting surface 45. Due to the elastic force of the elastic pad 81, when the connecting member 6 is subjected to force, the connecting member 6 can squeeze the elastic pad 81 to move toward the sliding steel ball 51. As the elastic pad 81 is squeezed, the axial position of the connecting member 6 changes, thereby changing the locking state of the nut.

[0094] Furthermore, as a preferred embodiment of the present invention, the connector 6 is an integrally assembled structure, and can also be provided as a split fixed structure according to practical needs to meet the need for variable diameter movement of the end portion.

[0095] Furthermore, in this embodiment, the depth of the guide hole 44 on the locking disk 42 is adapted to the length of the connecting member 6, so that the elastic pad 81 and the annular plate 64 on the connecting member 6 are both arranged in the guide hole 44, and the axial limiting component of the elastic pad 81 is also arranged in the guide hole.

[0096] As a preferred embodiment of the present invention, the elastic pad 81 and the annular plate 64 on the connecting member 6 are not necessarily arranged in the guide hole 44. When the depth of the guide hole 44 of the locking disk 42 is set to be smaller, the guide hole 44 can be a through hole structure. At this time, the axial limiting component of the elastic pad 81 can be a limiting structure arranged at the axial outer end of the guide hole 44. At this time, although the elastic pad 81 is still sleeved on the connecting member 6, the elastic pad 81 and the annular plate 64 on the connecting member 6 can be arranged at the axial outer end of the guide hole 44 to play its axial limiting role.

[0097] In this embodiment, Figure 2 、 Figure 6 、 Figure 9 As shown, there is an interference fit between the outer sleeve 2 and the driving sleeve 3, and the driving sleeve 3 is arranged on the inner side of the outer sleeve 2. The inner circumference of the driving sleeve 3 is provided with a first driving part 31 that matches and connects to the upper end of the connecting member 6. The first driving part 31 includes a clamping claw 34 and a positioning countersunk hole 35 that alternately abut against the first end face 61 of the upper end of the connecting member 6. The clamping claw 34 and the positioning countersunk hole 35 are arranged adjacent to each other. As the driving sleeve 3 and the locking disk 42 rotate relative to each other, the first end face 61 of the connecting member 6 can be connected with the clamping claw 34 or the positioning countersunk hole 35, and as the driving sleeve 3 rotates, the end of the connecting member 6 alternately abuts against the clamping claw 34 and the positioning countersunk hole 35.

[0098] Specifically, the first driving part 31 as a whole is a curved pressing claw structure arranged along the circumference of the driving sleeve 3, the clamping claw 34 is an inclined surface structure with an arc, the positioning countersunk hole 35 is arranged on the side of the driving claw 33, and the positioning countersunk hole 35 is an inward concave circular hole structure arranged along the axis. The positioning countersunk hole 35 is engaged with the spherical structure of the first end face 61, and there is an axial height difference between the clamping claw 34 and the positioning countersunk hole 35. When the nut is working and locking, by rotating the driving sleeve 3, the clamping claw 34 can press the first end face 61 of the upper end of the connecting member 6. When the nut torque is small, the clamping claw 34 is connected to the upper end of the connecting member 6. When the nut torque is large, the upper end of the connecting member 6 is connected to the positioning countersunk hole 35 of the driving sleeve 3. The locking positioning of the driving sleeve 3 can be completed by the change of the axial displacement of the connecting member 6.

[0099] Furthermore, in this embodiment, the number of first driving parts 31 is matched with the number of connecting parts 6, and a total of four first driving parts 31 are provided on the inner circumference of the driving sleeve 3. The first driving parts 31 are evenly distributed along the circumference of the driving sleeve 3, and the first driving parts 31 and the driving claws 33 serving as the second driving parts 32 are alternately arranged at intervals, and the first driving parts 31 are arranged between the circumferences of two adjacent driving claws 33.

[0100] In this embodiment, Figure 10 As shown, the pressing member 7 is provided with a pressing pad 71, which is a circular washer structure. The pressing pad 71 is sleeved on the lower portion of the nut body 1. The pressing pad 71 is movable relative to the axis of the nut body 1 to press the object to be tightened and transmit the tightening force of the nut body 1. The outer sleeve 2, the drive sleeve 3, the locking plate 42, the connecting member 6 and the sliding steel ball 51 are all arranged in the space between the upper end of the nut body 1 and the pressing pad 71.

[0101] Furthermore, the lower end face of the pressure pad 71 is provided with an inner concave annular surface 72 that can be in contact and connected with the sliding steel ball 51, and the outer peripheral side of the pressure pad 71 is provided with an annular sealing ring groove 73 on which the sealing ring 10 can be installed. The sealing ring groove 73 is arranged along the circumference of the pressure pad 71, and the sealing ring 10 is arranged between the outer periphery of the pressure pad 71 and the inner periphery of the drive sleeve 3.

[0102] The working principle of this embodiment is:

[0103] First, assemble the quick-change nut, such as Figure 1 、 Figure 2 As shown, the outer sleeve 2 and the driving sleeve 3 are assembled by interference fit, the connecting part 6, the elastic pad 81, and the sliding steel ball 51 are assembled into one through the locking disk 42, and then the sealing ring 10 is installed in the sealing ring groove 73 of the compression pad 71, and finally the various structures are connected in series through the internal thread of the nut body 1 and the retaining spring 9, thereby completing the assembly of the quick-change nut.

[0104] When the quick-change nut is locked, the driving sleeve 3 is driven to rotate by rotating the driving sleeve 2 clockwise, and the clamping claw 34 of the driving sleeve 3 is pressed against the first end face 61 of the upper end of the connecting member 6. Due to the elastic force of the elastic pad 81, the initial tightening torque of the nut is small and the connecting member 6 cannot be pressed down, so it can only lock the rotation of the driving sleeve 3 and drive the locking disk 42 to rotate synchronously; as the driving sleeve continues to rotate, the axial extrusion force generated by the thread of the quick-change nut is large enough, and at this time the driving sleeve 3 and the connecting member 6 produce relative rotation, and the clamping claw 34 of the driving sleeve 3 squeezes the first end face 61 of the upper end of the connecting member 6, causing the connecting member 6 to move axially.

[0105] Since the lower end of the connecting member 6 is connected to the sliding steel ball 51 in the sliding groove 411, when the quick-change nut is in the non-tightened state, such as Figure 11As shown, at this time, the second end surface 62 of the connector 6 is in contact with the sliding steel balls 51 on both sides, and the steel balls on both sides cannot abut against each other. As the tightening torque of the quick-change nut gradually increases, the drive sleeve 3 squeezes the connector 6 and the elastic pad 81 toward the axial direction of the sliding steel balls 51 through the clamping claw 34 and the first end surface 61 of the connector 6. As the connector 6 moves axially, the sliding surface 63 at the lower end of the connector 6 connects with the sliding steel balls 51 on both sides, increasing the distance between the sliding steel balls 51 on both sides. Figure 12 As shown, the sliding steel balls 51 move toward the ends of the sliding groove 411 respectively, and the sliding steel balls on both sides abut against the high positions of the ends of the sliding groove 411, restricting the sliding steel balls 51 from moving from the high position to the low position in the groove.

[0106] When the sliding surface 63 of the connecting member 6 contacts the sliding steel balls 51 on both sides, as the axial displacement of the connecting member 6 changes and the driving sleeve 3 rotates, the first end face 61 of the upper end of the connecting member 6 is clamped in the positioning countersunk hole 35 of the driving sleeve 3. Under the elastic force of the elastic pad 81, the locking state of the driving sleeve 3 is positioned to prevent the driving sleeve 3 from loosening due to inertia caused by sudden stop when rotating at high speed; and the nut is continued to be tightened, and the driving claw 33 of the driving sleeve 3 pushes the driving groove 46 of the locking disk 42 to continue rotating, completing the locking function of the quick-change nut. Since the locking disk 42 is connected to the driving flat 104 of the nut body 1 through the rotating connection structure 43 of the inner hole, the locking disk 42 drives the nut body 1 to rotate, thereby clamping the workpiece.

[0107] Furthermore, when it is necessary to loosen the workpiece and release the locking state of the nut, the driving sleeve 3 is driven to rotate by rotating the outer sleeve 2. At this time, the position of the driving sleeve 3 pressed on the first end face 61 of the upper end of the connecting member 6 rotates from the positioning countersunk hole 35 to the position of the clamping claw 34. The connecting member 6 moves in the direction away from the sliding steel ball 51 under the action of the elastic pad 81, and the contact position between the lower end of the connecting member 6 and the sliding steel ball 51 is transferred from the sliding surface 63 with a larger radial dimension to the second end face 62 with a smaller dimension. Under the action of the axial extrusion force of the quick-change nut, the position of the sliding steel ball 51 in the sliding groove 411 rolls from the high end to the low end. Due to the height difference at the end of the sliding groove 411, the axial extrusion force of the quick-change nut thread is rapidly reduced, so that the operator can easily loosen the nut by hand, and the operation is simple.

[0108] Example 2

[0109] like Figure 13As shown, in this embodiment, the drive assembly further includes an outer sleeve 2, which is disposed on the outer periphery of the drive sleeve 3 and has an interference fit with the drive sleeve 3. The outer sleeve 2 and the drive sleeve 3 rotate synchronously. A pressing member 7 is disposed at the end of the nut body 1. The pressing member 7 is movable relative to the axial direction of the nut body 1 and can limit the axial displacement of the locking assembly. The drive assembly and the locking member 4 are both disposed between the nut body 1 and the pressing member 7. The nut body 1 passes through the drive assembly and the locking member 4 in sequence, and the end portion is connected to the pressing member 7.

[0110] In this embodiment, the drive sleeve 3 is a rotating sleeve structure, which includes a rotating cylinder 36 and a rotating cylinder cover 37 arranged at the end of the rotating cylinder 36. The rotating cylinder 36 and the rotating cylinder cover 37 are both hollow structures. The drive sleeve 3 is sleeved on the nut body 1. The drive sleeve 3 can drive the nut body 1 to rotate circumferentially. During the rotation of the drive sleeve 3 relative to the nut body 1, the connecting member 6 can move closer to or away from the clamping member 7 in the direction of the axis of the nut body.

[0111] Specifically, such as Figure 14 、 Figure 15 As shown, the nut body 1 is a hollow disc-shaped structure as a whole. The nut body 1 includes a main body 11 and a guide adjustment part 12. The guide adjustment part 12 is arranged on the outer peripheral side of the main body 11 and is fixedly connected to the main body 11. The guide adjustment part 12 is coaxially arranged with the main body 11.

[0112] The main body 11 is a hollow cylindrical threaded shaft structure with an internal thread, which is connected to the external connecting parts such as a screw by threaded cooperation to achieve the fastening of the workpiece. In the axial direction, the diameter of the internal threaded through hole remains consistent to form a uniform inner hole structure; a retaining spring groove 105 is provided on the outer peripheral side of the lower end of the main body 11. The retaining spring groove 105 is a circular groove structure uniformly distributed along the circumference of the nut body 1. A retaining spring 9 is provided at the end of the nut body 1, and the retaining spring 9 is clamped in the retaining spring groove 105 at the end of the main body 11.

[0113] In this embodiment, the main body 11 and the guide adjustment part 12 are integrally formed, and the locking piece provided on the quick-change nut is the guide adjustment part 12 integrally provided with the main body 11. The guide adjustment part 12 is provided on the inner circumference of the rotating cylinder 36 of the drive sleeve 3. The guide adjustment part 12 is a circular sleeve structure fixedly provided on the outer circumference of the main body 11. The outer diameter of the guide adjustment part 12 is larger than the inner diameter of the main body 11, and a locking space is provided between the lower inner circumference of the guide adjustment part 12 and the outer circumference of the main body 11.

[0114] A limiting member 13 is connected to the nut body 1, and the limiting member 13 is arranged at the end of the connecting member 6. A limiting portion 131 is provided on the limiting member 13. The limiting portion 131, the sliding member 5 and the lower end of the connecting member 6 are all arranged in the internal space of the guide adjustment portion 12. A guide portion is provided on the guide adjustment portion 12, and the connecting member 6 is connected to the guide portion. The limiting portion 131 is arranged at the axial end of the guide portion, and the connecting member 6 is connected to the sliding member 5 through the guide portion.

[0115] Specifically, the guide portion is arranged on the upper end surface of the main body 11, and the guide portion is a guide hole 44 axially arranged and penetrated along the guide adjustment portion 12. The guide hole 44 is a circular through hole structure. The guide hole 44 is arranged on the upper end surface of the guide adjustment portion 12, and the guide hole 44 is arranged at the axial upper end of the limiting portion 131. The guide hole 44 is connected to the limiting portion 131; the connecting member 6 is arranged in the guide hole 44, and the lower end of the connecting member 6 passes through the guide hole 44 and is connected to the sliding member 5 in the limiting portion 131, and the upper end of the connecting member 6 is in contact and connected with the driving sleeve 3.

[0116] In this embodiment, a total of six guide holes 44 are provided along the circumferential direction of the guide adjustment portion 12. The six guide holes 44 are evenly distributed on the outer peripheral side of the main body 11. The number of guide holes 44 matches the number of connecting parts 6. Through the cooperation of the various components, stable driving of the components is achieved, thereby achieving the clamping of the locking nut workpiece.

[0117] like Figure 15 、 Figure 16 As shown, a spiral lifting structure is provided between the outer peripheral side of the guide adjustment part 12 and the rotating cylinder 36 of the drive sleeve 3. The spiral lifting structure is a groove structure provided on the outer peripheral side of the nut body 1 or the rotating cylinder 36 of the drive sleeve, and a sliding part 14 is connected to the other structure. The sliding part 14 is slidably connected to the groove structure. The sliding part 14 and the spiral lifting structure can be matched and connected by means of concave-convex engagement or drive connection. The drive sleeve 3 can rotate relative to the nut body 1 through the spiral lifting structure and the sliding part, and the sliding part 14 can slide circumferentially in the groove structure to realize the increase or decrease of the axial distance between the nut body 1 and the drive sleeve 3.

[0118] Specifically, the spiral lifting structure is a spiral groove 121 disposed on the outer periphery of the guide and adjustment portion 12. The spiral groove 121 is arranged along the circumference of the nut body 1 and is a stepped, position-limiting groove structure with an axial height difference. The spiral groove 121 comprises an upper ball groove portion and a lower ball groove portion, with a lifting portion therebetween. The upper ball groove portion is higher than the lower ball groove portion and is disposed at the upper portion of the outer periphery of the guide and adjustment portion 12, while the lower ball groove portion is disposed at the lower portion of the outer periphery of the guide and adjustment portion 12. Both the upper and lower ball groove portions have concave spherical structures, while the lifting portion is a spiral transitional annular groove structure.

[0119] Furthermore, a total of three spiral grooves 121 are provided on the outer circumference of the guide adjustment portion 12 , and the three spiral grooves 121 are evenly distributed along the same rotation direction of the circumference of the guide adjustment portion 12 .

[0120] In this embodiment, the sliding portion 14 moves synchronously with the driving sleeve 3. The driving sleeve 3 is connected to a sliding driving portion. The sliding portion 14 is connected to the driving sleeve 3 through the sliding driving portion. The sliding driving portion is a sliding portion accommodating groove 38 arranged on the peripheral side of the rotating cylinder 36. The sliding portion accommodating groove 38 is a circular through-hole structure arranged through the rotating cylinder 36. The sliding portion accommodating groove 38 and the sliding portion 14 form a sliding structure. The sliding structure can slide circumferentially along the spiral groove 121, thereby driving the driving sleeve 3 and the nut body 1 to rotate relative to each other. The rotation direction of the driving sleeve 3 moves from the upper ball groove portion of the spiral groove 121 to the lower ball groove portion.

[0121] Furthermore, the sliding portion 14 can be directly fixedly connected to the driving sleeve 3 or connected to the driving sleeve 3 through a sliding driving portion to achieve synchronous movement. The sliding driving portion can be a through-hole structure or a groove structure.

[0122] like Figure 14 、 Figure 17 As shown, the drive sleeve 3 is arranged on the outer periphery of the nut body 1, and a pressing surface 39 is provided on the drive sleeve 3. The pressing surface 39 is an inner annular surface structure provided on the rotating cylinder cover 37 of the drive sleeve 3. The inner peripheral side of the pressing surface 39 is in contact with the main body 11, and the lower end surface of the pressing surface 39 is provided at the upper end of the guide adjustment portion 12 and abuts against the upper end of the connecting member 6. When the drive sleeve 3 is working and rotating, the sliding portion 14 slides in the spiral groove 121, and the drive sleeve 3 slides downward along the spiral groove 121, sliding from the upper ball groove portion of the spiral groove 121 to the lower ball groove portion. The axial distance between the nut body 1 and the drive sleeve 3 is reduced, the drive sleeve 3 moves downward, and the pressing surface 39 of the drive sleeve 3 presses the connecting member 6 and moves in the direction of the pressing member 7. When the nut is loosened, the drive sleeve 3 is rotated to cause the sliding portion 14 to slide from the lower ball groove portion of the spiral groove 121 to the upper ball groove portion.

[0123] Specifically, in this embodiment, the sliding portion 14 is a driving steel ball 141 disposed between the sliding portion receiving groove 38 and the spiral groove 121 , and the driving steel ball 141 is a spherical ball structure.

[0124] In this embodiment, the number of sliding portion accommodating grooves 38 and driving steel balls 141 matches the number of spiral grooves 121, and three are provided. The sizes of the sliding portion accommodating grooves 38 and the spiral grooves 121 match the sizes of the driving steel balls 141. The driving steel balls 141 are clamped between the sliding portion accommodating grooves 38 and the spiral grooves 121, thereby rotating the driving sleeve 3. The driving steel balls 141 can slide along the spiral grooves 121, and then drive the driving sleeve 3 to move downward along the spiral grooves 121. The pressing surface 39 of the driving sleeve 3 presses the connecting piece 6 to move in the axial direction, thereby realizing the locking of the quick-change nut.

[0125] Furthermore, in this embodiment, if Figure 14 As shown, the outer sleeve 2 is a circular sleeve structure. The outer sleeve 2 is arranged on the outer peripheral side of the rotating cylinder 36 of the driving sleeve 3, and is arranged on the sliding portion receiving groove 38 and the outer periphery of the driving steel ball 141, for fastening the driving sleeve 3 and preventing the driving steel ball 141 from moving radially, thereby ensuring its stable driving effect.

[0126] Furthermore, as a preferred embodiment of the present invention, the matching cross-sectional shapes of the sliding portion receiving groove 38 and the spiral groove 121 can be rectangular, circular, trapezoidal, or polygonal, and the driving steel ball 141 that performs the driving function can also be adapted and replaced with a raised sliding structure of other shapes. Furthermore, the number of sliding portion receiving grooves 38 and driving steel balls 141 provided matches the number of spiral grooves 121 provided, and the specific number provided can be adapted and adjusted according to actual usage requirements.

[0127] Furthermore, as a preferred embodiment of the present invention, the guide adjustment portion 12 provided on the quick-change nut can be a detachable fixed structure separated from the main body 11 of the nut body 1 or a locking structure integrally processed and set with the main body. The guide adjustment portion 12 is provided on the outer periphery of the main body to realize the synchronous rotation of the locking member 4 and the nut body 1.

[0128] like Figure 16 As shown, the limiting portion 131 is coaxially arranged with the guide portion. The limiting portion 131 is arranged at the axial lower end of the guide portion. The limiting portion 131 is a limiting structure arranged circumferentially along the locking member 4 and has an axial height difference. The sliding member 5 can move circumferentially within the limiting portion 131.

[0129] Specifically, such as Figure 14 、 Figure 18 As shown, a limiting member 13 is connected to the guide adjustment portion 12, and the limiting portion 131 is a sliding groove 132 arranged in the circumferential direction of the limiting member 13. The limiting member 13 is arranged in the locking space on the inner circumferential side of the guide adjustment portion 12 on the nut body 1, and the limiting member 13 is sleeved on the end of the connecting member 6. The end of the connecting member 6 passes through the guide hole 44 of the guide adjustment portion 12 and the limiting member 13 in sequence, and then contacts the sliding member 5.

[0130] In this embodiment, the limiting member 13 is a limiting pad arranged on the inner side of the guide adjustment part 12. The limiting pad is a circular ring structure. A through hole is provided in the middle of the limiting pad. The size of the through hole is adapted to the size of the main part 11 of the nut body 1. The inner diameter of the limiting pad is the same as the outer diameter of the main part 11 of the nut body 1. The outer diameter of the limiting pad matches the inner diameter of the guide adjustment part 12, so that the outer side of the limiting pad can fit with the inner wall of the guide adjustment part 12, and the inner side of the limiting pad can fit with the outer side of the main part 11.

[0131] The sliding groove 132 is arranged at the lower part of the limiting pad, and the sliding groove 132 is arranged along the circumference of the lower part of the limiting pad. The circumferential curvature of the sliding groove 132 matches the circumferential curvature of the limiting pad. The sliding groove 132 is arranged on the outer periphery of the through hole in the middle of the limiting pad. The number of sliding grooves 132 matches the number of connecting parts 6. There are a total of six sliding grooves 132 on the limiting pad, and the six sliding grooves 132 are evenly distributed along the circumference of the limiting pad.

[0132] In this embodiment, the sliding groove 132 is an annular arc groove structure adapted to the sliding member 5. The sliding groove 132 is a symmetrical structure. The sliding groove 132 serves as a sliding raceway for the sliding member 5. The sliding member 5 can slide circumferentially in the sliding groove 132 but cannot move radially.

[0133] Furthermore, the sliding groove 132 is arranged toward the clamping member 7, and the groove depth inside the sliding groove 132 is unevenly distributed, wherein the groove depth in the middle is greater than the groove depth at both ends, presenting a concave arc groove structure with a low middle portion and high ends. Along the circumferential length direction of the sliding groove 132, the middle position is the lowest and the two ends are the highest, and the arc gradually rises from the middle portion to the two ends. The bottom surface of the sliding groove 132 can be set to a flat or curved structure as needed. As the sliding member 5 slides in the sliding groove 132, the sliding member 5 can contact different axial positions of the connecting member 6, causing the axial displacement of the connecting member 6 to change.

[0134] Furthermore, in this embodiment, the limiting member 13 is connected to the nut body 1, and the limiting member 13 and the guide adjustment portion 12 can be arranged in a split connection structure, or can be arranged in an integrated processing structure according to needs.

[0135] like Figure 14 As shown, the sliding member 5 arranged in the sliding groove 132 is a sliding steel ball 51, and two sliding steel balls 51 are arranged in each sliding groove 132. The two sliding steel balls 51 are respectively arranged on the left and right sides of the sliding groove 132, and are respectively arranged on both sides of the end of the connecting member 6. Every two sliding steel balls 51 form a group, and a total of six groups of sliding steel balls 51 are arranged in the limiting pad. The number of groups of sliding steel balls 51 matches the number of connecting members 6.

[0136] Specifically, since the two sliding steel balls 51 are symmetrically arranged on the left and right sides of the connecting member 6, the two sliding steel balls 51 are separated by the connecting member 6, and the sliding steel balls 51 are abutted against the end of the connecting member 6, the two sliding steel balls 51 are arranged along the circumference of the sliding groove 132. When the connecting member 6 is subjected to force to move axially, the sliding steel balls 51 on both sides are squeezed to move from the middle to the end of the sliding groove 132. Since the sliding groove 132 has an inclined arc, there is a height difference between the axial high and low points of the sliding groove 132. When the external position of the steel ball changes, due to the height difference, the sliding steel ball 51 can be made to contact different axial positions of the connecting member 6, thereby adjusting the locking state of the locking nut.

[0137] like Figure 14 As shown, in this embodiment, there are a total of six connecting parts 6 connected to the nut body 1, and the connecting part 6 is a reducing rod structure arranged along the axial direction of the locking disk. The six connecting parts 6 are evenly distributed along the circumference of the guide adjustment part 12, and are arranged in the guide hole 44 of the guide adjustment part 12. The upper end of the connecting part 6 is connected to the drive sleeve 3, and the lower end of the connecting part 6 is in contact and connected with the two sliding steel balls 51 in the sliding groove 132.

[0138] Specifically, such as Figure 19 As shown, the connecting member 6 is a pin-like structure, and the connecting member 6 includes a first end face 61 and a second end face 62. The first end face 61 and the second end face 62 are both variable-section structures with inclined or arc-shaped structures having high and low surfaces. The first end face 61 and the second end face 62 are respectively arranged at the two ends of the connecting member 6, wherein the first end face 61 is arranged at the upper end of the connecting member 6, and the first end face 61 is in contact with the upper inner end face of the driving sleeve 3, and the second end face 62 is arranged at the lower end of the connecting member 6, and the second end face 62 is arranged close to the clamping member 7, and the side of the second end face 62 is connected to the sliding steel ball 51.

[0139] In this embodiment, the first end face 61 of the upper end of the connecting member 6 is an arc spherical structure, the lower end of the connecting member 6 is provided with a conical structure, the second end face 62 is an annular inclined surface structure with a taper, and a sliding surface 63 is provided between the first end face 61 and the second end face 62. The middle area between the upper end and the lower end of the connecting member 6 is composed of two cylindrical structures of different sizes. The sliding surface 63 is arranged on the outer circumferential surface of the cylindrical structure, the upper size is larger than the lower size, and the size of the upper cylindrical structure is adapted to the size of the first end face, and the size of the lower cylindrical structure is adapted to the size of the second end face.

[0140] Furthermore, if Figure 14 As shown, in this embodiment, an elastic member 8 is sleeved on each connecting member 6 , and the connecting member 6 can compress the elastic member 8 so that the connecting member 6 moves toward the sliding steel ball 51 at the lower end relative to the elastic member 8 .

[0141] Specifically, such as Figure 13 、 Figure 14 、 Figure 20 As shown, the elastic member 8 is an elastic pad 81 that is sleeved on the cylindrical structure in the middle of the connecting member 6. The elastic pad 81 is an annular elastic washer structure. The inner diameter of the elastic pad 81 is adapted to the small cylindrical structure of the connecting member 6, and the outer diameter of the elastic pad 81 is adapted to the size of the large cylindrical structure of the connecting member 6. The elastic pad 81 is arranged in the axial upper part of the limit member 13, and the elastic pad 81 is arranged between the connecting member 6 and the limit member 13. The upper end surface of the limiting member 13 is provided with an axial limiting portion for limiting the axial movement of the elastic pad 81. The axial limiting portion is arranged at the lower end of the elastic pad 81. The axial limiting portion includes a limiting hole 133. The number of limiting holes 133 matches the number of elastic pads 81. There are six limiting holes 133 in total. The six limiting holes 133 are evenly distributed along the circumference of the limiting member 13. The limiting holes 133 are circular hole structures, and an annular limiting surface is provided on the limiting hole 133. The inner diameter of the annular limiting surface is adapted to the inner diameter of the connecting member 6 and the elastic pad 81, and the outer diameter of the annular limiting surface is adapted to the outer diameter of the elastic pad 81. The sizes are matched, the upper end face of the elastic pad 81 is in contact with and connected to the connecting member 6, and the lower end face of the elastic pad 81 is in contact with and connected to the annular limiting surface at the upper end of the limiting member 13. The annular limiting surface is used to limit and support the axial direction of the elastic pad 81, and the elastic pad 81 is clamped between the lower end of the connecting member 6 and the annular limiting surface. Due to the elastic force of the elastic pad 81, when the connecting member 6 is subjected to force, the connecting member 6 can squeeze the elastic pad 81 to move toward the sliding steel ball 51. As the elastic pad 81 is squeezed, the axial position of the connecting member 6 changes, thereby changing the locking state of the nut.

[0142] Furthermore, Figure 14 、 Figure 21 As shown, the pressing member 7 is provided with a pressing pad 71, which is a circular washer structure. The pressing pad 71 is sleeved on the lower part of the nut body 1 to press the object to be fastened.

[0143] Specifically, the upper end surface of the pressure pad 71 is provided with an annular groove 74 that is adapted to the sliding groove. The annular groove 74 is an inwardly concave annular groove structure arranged along the circumference of the pressure pad 71. The sliding steel ball 51 is in contact with and connected to the annular groove 74, and a variable diameter space is formed between the sliding groove 132 and the annular groove 74. The sliding steel ball 51 is arranged in the variable diameter space, and the sliding steel ball 51 can slide circumferentially in the variable diameter space.

[0144] Furthermore, the implementation methods of the parts not specified in this embodiment can be the same as those in Example 1, and the specific contents will not be repeated. Those skilled in the art can also adapt and adjust the structure of the quick-change nut according to actual usage requirements to meet actual usage requirements.

[0145] The working principle of this embodiment is:

[0146] When the quick-change nut is in the locking state, the nut body 1 is tightened onto the threaded shaft of the fastening tool through the internal internal thread. First, the outer sleeve 2 and the driving sleeve 3 are rotated. Under the action of the driving steel ball 141 and the spiral groove 121 on the nut body 1, the driving sleeve 3 drives the driving steel ball 141 to slide along the spiral groove 121, thereby forcing the driving sleeve 3 to rotate and move downward along the spiral groove 121. During the rotation of the driving sleeve 3, the driving steel ball 141 moves to the lower position of the spiral groove 121, and the quick-change nut is in the locked state. At this time, the pressing surface 39 of the driving sleeve 3 presses the connecting member 6 to move toward the elastic pad 81. The connecting member 6 moves downward, pushing the sliding steel balls 51 on both sides to move respectively to the sides, from the lower position to the higher position, so that the distance between the sliding steel balls 51 on both sides becomes larger, and the sliding steel balls 51 are engaged in the locking space of the limiter 13, thereby achieving nut locking.

[0147] When loosening the quick-change nut, the drive sleeve 3 is rotated to rotate the drive steel ball 141 from the low position of the spiral groove 121 of the nut body 1 to the high position. The force of the compression surface 39 of the drive sleeve 3 pressing the connector 6 and squeezing the elastic pad 81 disappears, the elastic pad 81 recovers its elastic force, the connector 6 moves upward, and the sliding steel balls 51 on both sides move toward the middle, respectively, from the high position to the low position, so that the distance between the sliding steel balls 51 on both sides becomes smaller, and the restriction of the sliding steel balls 51 on both sides disappears. At this time, the quick-change nut is in a loosened state. The embodiment of the present invention converts the circumferential motion of the drive sleeve 3 into the axial motion of the connector 6 through the coordinated rotation of the drive sleeve 3, the drive steel ball 141 and the spiral groove 121, so that the operator can easily loosen the nut by hand, which is simple to operate.

[0148] The present invention provides a quick-change nut that is easy to operate. The locking part is driven to rotate by a driving component. The quick-change nut completes the locking and loosening of the nut under the adaptation action of the locking component and the connecting component. Not only can the nut be locked firmly and not easy to loosen during vibration, but the phenomenon that the quick-change nut is easily loosened during vibration is improved; and under the action of the axial extrusion force of the quick-change nut, the sliding part moves in the locking part, the axial relative displacement of the sliding part and the connecting part changes, and the position of the sliding part in the limiting part changes, so that the axial extrusion force of the quick-change nut thread is rapidly reduced, so there is no need to add other structures or use auxiliary tools to loosen the nut. The operator can quickly loosen the nut by hand, which is easy to operate and reduces the cost of the quick-change nut.

[0149] In the description of the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0150] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0151] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A quick-change nut, comprising a nut body, wherein the nut body is provided with an internal thread, characterized in that: Also includes: A locking member, the locking member being connected to the nut body and driving the nut body to rotate synchronously; A drive assembly, the drive assembly comprising a drive structure and a sliding structure, wherein the drive structure can drive the sliding structure to move along the axial direction of the nut body when rotating relative to the nut body, the drive structure comprising a drive sleeve arranged on the outer peripheral side of the nut body, the sliding structure comprising a sliding member, the locking member being connected to a limiting portion capable of accommodating the circumferential movement of the sliding member, the limiting portion being a limiting groove structure having an axial height difference; a connecting assembly comprising a connecting member and a pressing member, wherein the connecting member is connected to the locking member, and when the driving assembly rotates, the connecting member can be driven to move along the axis of the nut body, an end of the connecting member abuts against the sliding member, and the pressing member has axial freedom of movement relative to the nut body; An elastic member is sleeved on the connecting member, and the elastic member enables the connecting member to move in a direction away from the pressing member.

2. A quick-change nut according to claim 1, characterized in that: The locking piece is a locking structure that is integrally provided with the nut body or separately connected, and the limiting portion and the nut body maintain a relatively fixed state. The limiting portion is integrally provided with the nut body, or the limiting portion is an independent component fixedly connected to the nut body.

3. The quick-change nut according to claim 2, characterized in that: The drive sleeve and the locking member are connected with a drive component, and the drive component includes a drive portion and a drive matching portion. There is a drive angle difference between the drive portion and the drive matching portion; the drive portion is arranged on the drive sleeve, and the drive matching portion is arranged on the locking member. The drive portion and the drive matching portion are connected by a concave-convex engagement or a drive connection.

4. The quick-change nut according to claim 3, characterized in that: The driving portion is arranged on the inner circumference of the driving sleeve, and the driving portion includes a first driving portion and a second driving portion. The first driving portion includes a pressing claw, and the pressing claw is a pressing claw structure with an inclined angle arranged along the circumference of the driving sleeve; The driving fitting portion includes a guide hole arranged along the axial direction of the locking member and a connecting fitting portion arranged along the circumferential direction of the locking member. The second driving portion and the connecting fitting portion can be connected through concave-convex engagement or driving connection. The connecting member is arranged in the guide hole and its ends are respectively connected to the clamping claw and the sliding member.

5. The quick-change nut according to claim 4, characterized in that: The clamping claw is provided with a positioning countersunk hole which is concave along the axis. As the driving sleeve rotates, the end of the connecting piece abuts against the clamping claw and the positioning countersunk hole alternately.

6. The quick-change nut according to claim 4, characterized in that: The locking member includes a locking disk, which is sleeved on the outer periphery of the nut body. The first end of the connecting member abuts against the first driving portion, and the second end of the connecting member is disposed in the limiting portion and connected to the sliding member. The limiting portion is a sliding groove arranged along the circumference of the locking disk, and the sliding member is movably arranged in the sliding groove.

7. The quick-change nut according to claim 6, characterized in that: Both circumferential ends of the sliding groove are R-arc structures or inclined surfaces. The diameter of the R-arc structure at the end of the sliding groove is greater than the diameter of the sliding part or the inclined surface angle of the end of the sliding groove is greater than 5 degrees.

8. The quick-change nut according to claim 2, characterized in that: The locking piece is arranged on the outer periphery of the nut body, and a spiral lifting structure is provided between the outer peripheral side of the locking piece and the cylinder body of the driving sleeve. The spiral lifting structure is a spiral groove arranged on the outer peripheral side of the locking piece or the driving sleeve body, and a sliding part adapted to be connected to the spiral groove is correspondingly provided on the other component.

9. The quick-change nut according to claim 8, characterized in that: The spiral groove includes an upper ball groove portion and a lower ball groove portion, and a lifting portion therebetween, wherein the upper ball groove portion is higher than the lower ball groove portion; The sliding part can be directly fixedly connected to the driving sleeve or the driving sleeve is connected to a sliding driving part, and the sliding part is connected to the driving sleeve through the sliding driving part to realize synchronous movement of the sliding part and the driving sleeve, and the spiral groove is arranged along the circumference of the locking member, and the spiral groove is a stepped limiting groove structure with an axial height difference, and the sliding part can drive the driving sleeve to rotate circumferentially along the spiral groove, and the sliding part slides circumferentially in the spiral groove to realize the increase or decrease of the axial distance between the locking member and the driving sleeve.

10. The quick-change nut according to claim 8, characterized in that: The driving sleeve is provided with a pressing surface, which is an inner annular surface structure provided on the upper end surface of the driving sleeve, and the lower end surface of the pressing surface is provided on the upper end of the locking member and abuts against the upper end of the connecting member; A limiting piece is connected to the nut body, and the limiting piece and the locking piece are integrally arranged or separately connected. The limiting piece is arranged at the lower end of the connecting piece, and the limiting portion is a sliding groove arranged on the limiting piece. The sliding groove is a concave arc groove structure arranged along the circumference of the limiting piece and with uneven depth distribution, and the groove depth in the middle is greater than the groove depth at both ends.

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