A quick positioning chuck

Abstract

This invention discloses a quick-positioning chuck, belonging to the field of drill chuck technology. The invention includes a chuck body and a jaw mechanism. A locking assembly is connected to the chuck body, comprising a segmented nut unit that can be spliced ​​to form a complete internal thread, a trigger unit, and an elastic reset unit. A limit element is connected to the outer periphery of the locking assembly. The elastic reset unit is used to compress the segmented nut units to fit together, thereby engaging the internal thread formed by the spliced ​​segmented nut units with the external thread on the chuck body. This invention utilizes the automatic elastic closing of the openable segmented nuts and the elastic reset unit to quickly engage and lock with the external thread of the chuck body. When the chuck needs to clamp an object of a certain diameter, the trigger unit can drag the jaws to the corresponding clamping range position, achieving rapid positioning. This invention has a compact structure, is simple to operate, adaptable to various scenarios and workpiece specifications, has strong versatility, can directly replace traditional chucks, and has a wide range of applications.

Description

Technical Field

[0001] This invention belongs to the field of drill chuck technology, and more specifically, relates to a quick positioning chuck. Background Technology

[0002] Currently, traditional chucks mostly employ a locking structure where an integral nut and the chuck body are threaded together. The clamping position of the jaws is adjusted and locked by rotating the nut. However, this structure has many inconveniences when adjusting: firstly, adjusting the clamping range requires repeatedly turning the nut for micro-feeding, which is cumbersome, time-consuming, and inefficient; secondly, the threaded fit clearance can easily lead to loosening of the lock, resulting in poor stability under vibration conditions; and thirdly, the integral threaded structure cannot achieve quick disengagement and axial sliding, making it difficult to meet the requirements of efficient and rapid positioning.

[0003] To address the aforementioned issues, while existing technologies have made some structural improvements, they generally suffer from problems such as complex structures, insufficient operational reliability, low guiding accuracy, and poor versatility, failing to ensure stable locking and efficient adjustment while simplifying operations. Summary of the Invention

[0004] This invention addresses the technical problems existing in the prior art by providing a quick positioning chuck.

[0005] To solve the above-mentioned technical problems, the present invention includes a chuck body and a gripper mechanism. A locking assembly is connected to the chuck body. The locking assembly includes a segmented nut unit that can be spliced ​​to form a complete internal thread, a trigger unit, and an elastic reset unit. A limiting member that restricts the radial degree of freedom of the locking assembly is connected to the outer periphery of the locking assembly. The elastic reset unit is used to squeeze the segmented nut units to fit together, so that the internal thread formed by splicing the segmented nut units engages with the external thread on the chuck body. The trigger unit can change the closed state of the segmented nut units.

[0006] Preferably, the locking component is sleeved on the outer periphery of the chuck body, the gripper mechanism is connected to the locking component, the locking component is coaxially arranged with the chuck body, and the locking component can move along the axial direction of the chuck body, thereby driving the gripper mechanism to adjust the clamping range.

[0007] Preferably, the locking assembly further includes a locking base, which includes a base plate and a plurality of boss structures extending axially along the base plate. A constraint track is provided between adjacent boss structures to restrict the action of the segmented nut unit and the trigger unit. The constraint track is provided with a slot and a segment receiving groove to accommodate the segmented nut unit.

[0008] Preferably, the segmented nut unit includes a first nut and a second nut that are spliced ​​together. The first nut and the second nut are semi-annular nut segments that can be radially opened and closed. The outer side of the first nut and the second nut is provided with a snap-fit ​​part that is movably connected to the locking base. The inner side of the boss structure is provided with a snap-fit ​​mating part that is adapted to the snap-fit ​​part.

[0009] Preferably, the elastic reset unit is disposed between the outer periphery of the split nut unit and the inner wall of the limiting member. The elastic reset unit includes a reset spring, the first end of which is connected to the split nut unit, the second end of which is connected to the limiting member, and the outer periphery of the split nut unit is provided with a guide portion connected to the reset spring, and the guide portion is provided with a guide pin.

[0010] Preferably, the segmented outer periphery of the segmented nut unit has a splicing gap, which is located in the axial middle section of the splicing section; The triggering unit includes a pushing component, which has a protruding end and a pressing part. The protruding end can be inserted into the splicing gap of the segmented nut unit to separate the segmented nut unit.

[0011] Preferably, the triggering unit further includes a limiting component, which is connected to the pushing component; the limiting component is an elastic structure, and the limiting component is engaged with the pushing component through a groove structure to apply a radially outward elastic preload to the pushing component.

[0012] Preferably, the limiting member is provided with a limiting sleeve, and the lower end face of the limiting sleeve is provided with an annular limiting end face; the locking assembly also includes a connecting gasket, which is disposed on the inner circumference of the limiting sleeve and connected to the annular limiting end face; The connecting gasket has a connecting part; the end of the gripper mechanism has a connecting mating part, and the gripper is connected to the connecting part through the connecting mating part.

[0013] Preferably, it also includes a front sleeve, the outer periphery of which is provided with an opening groove adapted to the trigger unit.

[0014] Preferably, the outer periphery of the limiting member is fitted with an outer ring, and the outer ring is provided with a slot structure adapted to the triggering unit.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes a split-type nut that can be opened and closed, along with an elastic reset unit, to automatically engage and lock with the external thread of the chuck body. When the chuck needs to hold an object of a certain diameter, the trigger unit can drag the jaws to the corresponding clamping range for rapid positioning. Furthermore, this embodiment achieves rapid dragging and positioning of the jaws' clamping range through the cooperation of the split-type nut unit and the trigger unit, eliminating the need for repeated rotation and fine-tuning, significantly improving clamping efficiency. This invention features a compact structure, simple operation, adaptability to various scenarios and workpiece specifications, strong versatility, and can directly replace traditional chucks, making it widely applicable. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural diagram of one embodiment of the present invention; Figure 2 This is an axial sectional view of one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of one embodiment of the chuck body of the present invention; Figure 4 This is a schematic diagram showing the connection position between the locking component and the chuck body according to one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of one embodiment of the locking assembly of the present invention; Figure 6 This is a partial structural schematic diagram of one embodiment of the locking assembly of the present invention; Figure 7 This is a schematic diagram of the structure of one embodiment of the locking base of the present invention; Figure 8 This is a schematic diagram of the structure of one embodiment of the split nut unit of the present invention; Figure 9 This is a schematic diagram of the structure of one embodiment of the trigger unit top pin of the present invention; Figure 10 This is a schematic diagram of the structure of one embodiment of the elastic element of the trigger unit of the present invention; Figure 11 This is a schematic diagram of the structure of one embodiment of the limiting member of the present invention; Figure 12 This is a bottom view of one embodiment of the locking assembly of the present invention; Figure 13 This is a schematic diagram of the structure of one embodiment of the connecting gasket of the present invention; Figure 14 This is a schematic diagram of the structure of one embodiment of the gripper of the present invention; Figure 15 This is a schematic diagram of one embodiment of the present invention.

[0018] Explanation of symbols in the diagram: 1. Chuck body; 101. Head flange section; 102. External thread section; 103. Tail cylindrical section; 104. Clamping jaw oblique hole; 2. Clamping jaw mechanism; 21. Clamping jaw; 22. Connecting mating part; 3. Split nut unit; 31. First nut; 32. Second nut; 33. Internal thread; 34. Splicing gap; 35. Limiting protrusion; 36. Guide pin; 4. Triggering unit; 41. Top pin; 42. Spring; 5. Elastic reset unit; 51. Reset spring; 6. Limiting component; 61. Limiting sleeve; 62. Square slot; 7. Locking base; 71. Base plate; 72. Boss structure; 73. Slot; 74. Split body receiving groove; 75. Limiting groove; 8. Connecting gasket; 81. Rectangular groove; 9. Outer ring; 10. Front sleeve; 1001. Opening groove; 11. Rear sleeve; 1101. Protrusion structure. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0020] Example Please see Figure 1 , Figure 2 , Figure 5 This invention provides a quick positioning chuck, including a chuck body 1 and a gripper mechanism 2. A locking assembly is connected to the chuck body 1. The locking assembly includes a split nut unit 3 that can be spliced ​​to form a complete internal thread, a trigger unit 4, and an elastic reset unit 5. A limiting member 6 that can restrict the radial degree of freedom of the locking assembly is connected to the outer periphery of the locking assembly. The elastic reset unit 5 is used to squeeze the split nut units 3 to fit together, so that the internal thread formed by splicing the split nut units 3 engages with the external thread on the chuck body 1. The trigger unit can change the closed state of the split nut units.

[0021] In this embodiment of the invention, the openable split nut unit 3 and the elastic reset unit 5 automatically close, allowing for rapid engagement and locking with the external thread of the chuck body 1. When the chuck needs to hold an object of a certain diameter, the trigger unit 4 can drag the jaws to the corresponding clamping range for rapid positioning. Furthermore, this embodiment achieves rapid dragging and positioning of the jaws' clamping range through the cooperation of the split nut unit 3 and the trigger unit 4, eliminating the need for repeated rotation and fine-tuning, significantly improving clamping efficiency. This invention has a compact structure, is simple to operate, adaptable to various scenarios and workpiece specifications, has strong versatility, can directly replace traditional chucks, and has a wide range of applications.

[0022] In this embodiment, as Figure 2 , Figure 3As shown, the chuck body 1 has a stepped cylindrical rotating body structure, which is divided into a head flange section 101, an external thread section 102, and a tail cylindrical section 103 along the axial direction. An axial through hole is provided in the center. The chuck body 1 is provided with a jaw oblique hole 104, which is connected to the axial through hole. The jaw mechanism 2 is connected to the head flange section 101 and its end is set in the jaw oblique hole 104. The jaw mechanism 2 is connected to the locking assembly. The external thread section 102 is set on the outer periphery of the chuck body 1 and is engaged with the split nut unit 3 of the locking assembly.

[0023] Specifically, the chuck body 1 is a one-piece molded structure. Three jaw oblique holes 104 are evenly distributed along the circumference of the chuck body 1. The jaw mechanism 2 is provided with three jaws 21. The three jaws 21 are respectively set in the three jaw oblique holes 104 and cooperate with each other to achieve workpiece clamping. The jaw oblique holes 104 provide deformation space for adjusting the clamping range of the jaws and radial contraction. The tail cylindrical section 103 is a smooth cylindrical structure with a diameter smaller than the outer diameter of the external thread section 102.

[0024] In this embodiment, as Figure 4 As shown, the locking component is sleeved on the outer periphery of the external thread section 102 of the chuck body 1. The locking component is coaxially arranged with the chuck body 1. The locking component can move along the axial direction of the chuck body 1, thereby driving the gripper mechanism 2 to adjust the clamping range.

[0025] Specifically, such as Figures 4-6 As shown, the locking assembly has an overall ring-shaped nut structure with a circular outer contour and a through-hole circular cavity inside. The inner wall of the central shaft hole of the cavity has an internal thread. The circular cavity engages with the external thread section 102 of the chuck body 1 through the internal thread, enabling rotational drive. The split nut unit 3 is located in the central thread area of ​​the locking assembly. The trigger unit 4 and the elastic reset unit 5 are respectively located on the sides of the split nut unit 3, working together to realize the separation and closure of the split nut unit 3.

[0026] In this embodiment, as Figure 6 , Figure 7As shown, the locking assembly includes a locking base 7, a split nut unit 3, and a trigger unit 4, all connected to the locking base 7. The locking base 7 is an annular disc-shaped axisymmetric structure with an axially penetrating inner hole at its center. The locking base 7 includes a base plate 71 and a boss structure 72 disposed on the upper part of the base plate 71. The base plate 71 is an annular structure with a complete outer circular outline, an inner hole outline, and two parallel end faces. It serves as the bearing base of the locking assembly and is connected to other components. The boss structure 72 is a square protrusion extending outward along the normal direction of the base plate 71. Multiple boss structures 72 are provided, and the multiple boss structures 72 are evenly distributed around the circumference of the base plate 71. A slot 73 and a slot 74 for accommodating the split nut unit 3 are provided between adjacent boss structures 72.

[0027] Specifically, the locking base 7 is provided with a total of four boss structures 72. Two boss structures 72 are symmetrically arranged on both sides of the inner hole of the locking base 7. The upper end face of the boss structure 72 is parallel to the upper end face of the base plate 71. The height of the boss structure 72 is consistent along the circumference.

[0028] Furthermore, the locking base 7 is provided with a constraint track that restricts the opening and closing of the split nut unit 3 and restricts the radial movement of the trigger unit 4. The constraint track is set between adjacent boss structures 72, and the constraint track is provided with a slot 73 and a petal receiving slot 74. The trigger unit 4 is connected to the slot 73.

[0029] In this embodiment, the segmented nut unit 3 is disposed within the segment receiving groove 74, and the trigger unit 4 is disposed within the space formed by the slot 73, with its end capable of contacting and connecting with the segmented nut unit 3. Thus, the closed state of the segmented nut unit 3 can be changed via the trigger unit 4. The slot 73 is a notch / groove structure disposed between two boss structures 72 on the same side, and the width of the slot 73 is adapted to the width of the trigger unit 4. The segment receiving groove 74 is disposed between the boss structures 72 on both sides, and the width of the segmented nut unit 3 is adapted to the width of the segmented nut unit 3. The width of the segment receiving groove 74 is much larger than the width of the slot 73.

[0030] In this embodiment, the slot 73 not only serves as a locking and limiting structure for the trigger unit 4, but also functions as a track guide. The slot 73 acts as the track guide structure for the trigger unit 4, and it is connected to the petal receiving groove 74. The slot 73 and the petal receiving groove 74 cooperate to achieve an integrated design for limiting and guiding the movement of components such as the split nut unit 3 and the trigger unit 4. Furthermore, by setting the constraint track on the locking base 7, the moving components can directly complete the full stroke of limiting and driving within the constraint track, simplifying the track structure and reducing the number of parts.

[0031] Furthermore, as a preferred embodiment, the base plate 71 and the boss structure 72 on the locking base 7 are integrally formed, resulting in high connection strength. In actual use, the boss structure 72 and the base plate 71 can also adopt a separate fixed connection structure as needed, fixing the boss structure 72 to the upper part of the base plate through connectors or directly machined connecting parts.

[0032] like Figure 6 , Figure 8 As shown, in this embodiment, the split nut unit 3 is a split-ring structure. The split design enables radial opening and closing, and, in conjunction with the trigger unit 4 and the elastic reset unit 5, achieves precise locking adjustment. The split nut unit 3 includes a first nut 31 and a second nut 32 that are spliced ​​together. The first nut 31 and the second nut 32 are radially openable semi-ring nut segments, symmetrically arranged in the petal receiving groove 74 on the upper surface of the locking base 7. The petal receiving groove 74 not only serves as the constraint track for the first nut 31 and the second nut 32, but also as the driving track for their movement. Both the first nut 31 and the second nut 32 have internal threads 33 on their inner circumferences, which, when spliced, form a complete internal thread ring. The internal thread ring meshes with the external thread segment 102 of the chuck body 1. A splicing gap 34 is reserved on the outer circumferences of the first nut 31 and the second nut 32, providing triggering space for the trigger unit 4 to separate the split nut unit 3.

[0033] In this embodiment, the inner contour of the segmented nut unit 3 formed by splicing the first nut 31 and the second nut 32 is a completely closed annular structure with internal threads, and the outer contour of the segmented nut unit 3 is a non-completely closed polygonal structure with approximately chamfered squares. The splicing gap is set at the outer periphery of the segmented nut unit and is located in the axial middle section of the splicing section.

[0034] Furthermore, as a preferred embodiment, the splicing gap 34 between the first nut 31 and the second nut 32 is a "V-shaped" wedge-shaped driving inclined surface structure, which facilitates the extrusion separation of the trigger unit 4.

[0035] Furthermore, in a preferred embodiment, the outer circumference of the first nut 31 and the second nut 32 is provided with a snap-fit ​​portion that is movably connected to the locking base 7. The snap-fit ​​portion is provided with a limiting protrusion 35. The lower inner side of the boss structure 72 on the locking base 7 is provided with a snap-fit ​​mating portion that is adapted to the snap-fit ​​portion. The snap-fit ​​mating portion is provided with a limiting groove 75. When the segmented nut unit 3 moves, the limiting protrusion 35 can slide within the limiting groove 75. Both the limiting groove 75 and the limiting protrusion 35 extend along the moving direction of the segmented nut unit 3. Through the snap-fit ​​mating of the limiting groove 75 and the limiting protrusion 35, precise guidance and limiting are achieved. This not only restricts the radial and circumferential positions of the segmented nut unit 3, but also ensures the accuracy of the separation of the segmented nut units 3, allowing them to move along a preset track and preventing positional deviation.

[0036] like Figure 6 , Figure 7 As shown, in this embodiment, there are two trigger units 4, and the two trigger units 4 are respectively located on the outside of the splicing gap 34 of the first nut 31 and the second nut 32. The trigger units 4 can contact the splicing gap 34 of the split nut unit 3. The two trigger units 4 are symmetrically arranged on both sides of the locking base 7. The trigger units 4 contact the slots 73 of the locking base 7. The slots 73 form a constraint track for the movement of the trigger units 4.

[0037] Specifically, such as Figure 9 , Figure 10 As shown, the triggering unit 4 includes a pushing component and a limiting component. The limiting component is connected to the pushing component, and the pushing component extends radially along the locking base 7. The pushing component is provided with a top pin 41, which is a pin structure with a protruding end and a pressing part at both ends. The protruding end is located on the inner side and can be connected to the split nut unit 3. When the triggering unit 4 is activated, the protruding end of the top pin 41 can be inserted into the splicing gap 34 between the first nut 31 and the second nut 32, thereby separating the first nut 31 and the second nut 32 from each other.

[0038] In this embodiment, the protruding end is provided with a wedge-shaped protrusion structure, and the pressing part is provided with a cylindrical rod-shaped structure. By applying pressure to the pressing part, the protruding end can be pushed to move radially. Furthermore, a notch structure is provided between the protruding end and the pressing part for connecting with the limiting component to achieve circumferential anti-rotation positioning connection.

[0039] Furthermore, the limiting component is an elastic element structure. The ends of the elastic element abut against the locking assembly and the limiting component 6 respectively, so as to apply a radially outward elastic preload to the top pin 41, so that the top pin 41 has a radially inward movement tendency, and the elastic stroke of the elastic element limits the radial movement range of the top pin 41, so as to realize the radial elastic constraint on the top pin 41; and the elastic element provides an elastic restoring force for the pressing action of the top pin 41, so that it can automatically rebound and reset under the action of the elastic element after the pressing action is completed.

[0040] like Figure 6 , Figure 10 As shown, the elastic element includes a spring piece 42, which has an open arc-shaped structure and a square groove in the middle. The spring piece 42 connects to the notch structure of the top pin 41 through the square groove to achieve a locking and limiting action. The two ends of the spring piece 42 abut against the outer side of the boss structure 72 of the locking base 7, and the protruding end of the spring piece 42 facing outward contacts the limiting element 6, thereby positioning the spring piece 42 within the limiting space formed by the limiting element 6 and the boss structure 72 of the locking base 7. The spring piece 42, through its engagement with the top pin 41, can only perform elastic buffering and reset according to the moving direction of the top pin 41, preventing slippage.

[0041] Furthermore, as a preferred embodiment of the present invention, in actual use, the structure of the trigger unit can be set according to the actual working conditions. The trigger unit 4 can omit the independently set limiting component and achieve limiting through its own radial dimension, stepped structure or shoulder structure, thus simplifying the structure. When the limiting component is configured, the limiting component can be flexibly selected. The limiting component can be made of various materials or structures with elastic deformation function, or it can be a rigid limiting component without elasticity. It can be flexibly selected according to the installation space, load conditions, assembly and disassembly requirements to adapt to different usage scenarios.

[0042] In this embodiment, as Figure 6 As shown, the elastic reset unit 5 includes two reset springs 51, which are symmetrically arranged on the outside of the first nut 31 and the second nut 32. The reset springs 51 are located on the outside of the non-contact ends of the first nut 31 and the second nut 32, and their arrangement directions are perpendicular to the arrangement direction of the trigger unit 4. The reset springs 51 are located within the petal receiving groove 74 of the locking base 7, with their first end connected to the petal nut unit 3 and their second end connected to the limiting member 6. The reset springs 51 are positioned within the limiting space formed by the petal nut unit 3 and the limiting member 6.

[0043] In this embodiment, the return spring 51 is set in a compressed state within the trajectory space of the separation path of the split nut unit 3. When the trigger unit 4 separates the first nut 31 and the second nut 32, the return spring 51 provides radial elastic restoring force to the split nut unit 3. The automatic closing of the first nut 31 and the second nut 32 can be achieved through the return spring 51. At the same time, the return spring 51 can also provide preload force to offset the thread fit clearance and achieve anti-loosening compensation.

[0044] Furthermore, such as Figure 8As shown, a return spring support structure is provided on the side of the first nut 31 and the second nut 32 away from the mating clearance. The return spring support structure is provided with a guide pin 36 as a guide component. The guide pin 36 is a cylindrical structure that extends outward from the outer wall of the first nut 31 and the second nut 32. The size of the guide pin 36 matches the inner diameter of the return spring 51. The end of the return spring 51 is sleeved on the outside of the guide pin 36. The guide pin 36 serves as a mounting and positioning post for the return spring 51, providing support for elastic return. At the same time, it can limit the return spring 51 to move only in a radial straight line, preventing circumferential positional displacement and affecting the closing effect of the split nut unit 3.

[0045] In this embodiment, as Figure 6 As shown, the limiting member 6 is disposed on the outer periphery of the locking base 7. The limiting member 6 is provided with a limiting sleeve 61, which is connected to the trigger unit 4 and the elastic reset unit 5. The limiting sleeve 61 can restrict the radial movement of the outer ends of the trigger unit 4 and the elastic reset unit 5.

[0046] Specifically, such as Figure 11 As shown, the limiting sleeve 61 is a circular sleeve structure. The inner diameter of the limiting sleeve 61 is adapted to the outer diameter of the locking base 7. The upper two ends of the limiting sleeve 61 are symmetrically provided with square slots 62. The limiting sleeve 61 is connected to the top pin 41 through the square slots 62. The size of the square slots 62 is adapted to the size of the cylindrical section of the top pin 41. Its size can be slightly larger than the size of the cylindrical section of the top pin 41. The top pin 41 extends outward along the square slots 62 of the limiting sleeve 61 to facilitate the application of pressing pressure.

[0047] Furthermore, the upper and lower end faces of the limiting sleeve 61 are annular end face structures, perpendicular to the cylinder wall axis. The outer diameters of the upper and lower end faces of the limiting sleeve 61 are the same, but the inner diameter of the lower annular end face is smaller than that of the upper annular end face, so that the lower annular limiting end face of the limiting sleeve 61 can form an axial limiting of the internal structure and prevent axial displacement.

[0048] Furthermore, such as Figure 12 , Figure 13 As shown, the locking assembly also includes a connecting gasket 8, which is disposed at the lower end of the locking base 7. The connecting gasket 8 is disposed inside the limiting sleeve 61 and is in contact with the lower end face of the limiting sleeve 61. The lower end face of the limiting sleeve 61 provides axial limiting for the connecting gasket 8.

[0049] Specifically, such as Figure 13 , Figure 14As shown, the connecting gasket 8 is connected to the gripper mechanism 2. The connecting gasket 8 is an annular structure with an opening in the middle. It is a flat circular ring. The opening in the middle is an irregular inner hole structure composed of a central circular hole and three evenly distributed rectangular grooves on the outer periphery. The three evenly distributed rectangular grooves 81 are the connecting parts structure provided on the connecting gasket 8. The gripper 21 of the gripper mechanism 2 is provided with a connecting mating part 22 at its end. The gripper 21 is connected to the connecting part through the connecting mating part 22. The connecting mating part 22 is a groove structure provided on both sides of the upper end of the gripper 21. The groove structure can engage with the rectangular grooves 81 on the connecting gasket 8. The length of the groove on the gripper 21 is adapted to the length of the rectangular groove 81, and the width of the groove is adapted to the thickness of the connecting gasket 8. When the three grippers 21 cooperate with each other, the upper end of the gripper mechanism 2 can extend and retract along the length direction of the rectangular groove 81.

[0050] Furthermore, in this embodiment, as Figure 5 As shown, the outer periphery of the limiting sleeve 61 is fitted with an outer ring 9, which is an integrally formed open locking ring structure. The outer ring 9 covers the locking component, the limiting component 6, and the locking base 7 as a whole. The upper end surface of the outer ring 9 is provided with an annular limiting surface structure for axial pressing, limiting and supporting.

[0051] Furthermore, in one preferred embodiment, the outer ring 9 is provided with a notch structure that matches the top pin 41, and it is also provided with a C-shaped opening groove structure.

[0052] In this embodiment, as Figure 1 , Figure 2 As shown, the quick positioning chuck also includes a front sleeve 10 and a rear sleeve 11. The front sleeve 10 is disposed on the outer periphery of the chuck body 1 and the locking assembly, and the rear sleeve 11 is disposed on the inner side of the end of the front sleeve 10 away from the gripper mechanism 2, and the rear sleeve 11 is sleeved on the outer side of the end of the chuck body 1.

[0053] Specifically, the front sleeve 10 is a hollow cylindrical structure with anti-slip texture on its outer surface. Symmetrical opening slots 1001 are provided on both sides of the outer periphery of the front sleeve 10. Each opening slot 1001 is an elongated opening structure axially along the cylindrical wall. The width of the opening slot 1001 matches the width of the pressing part of the top pin 41. The protruding end of the top pin 41 is positioned within the opening slot 1001. When the locking assembly is threadedly engaged with the chuck body 1 and rotated, the top pin 41 can be axially adjusted within the opening slot 1001. Therefore, when the chuck needs to clamp an object of a certain diameter, pressing the top pin 41 can drag the gripper 21 to the corresponding clamping range position, achieving rapid positioning.

[0054] Furthermore, such as Figure 1 , Figure 15As shown, the rear sleeve 11 is fitted onto the upper end of the chuck body 1 and connected to the tail cylindrical section 103 of the chuck body 1. The whole is a flange-type stepped structure, including a large upper disc and a small lower cylindrical structure arranged coaxially. The outer diameter of the upper end is larger than the outer diameter of the small end. The rear sleeve 11 is provided with a protruding structure 1101 that can contact the end gap of the split nut unit 3. The protruding structure 1101 is located at the lower end of the cylindrical surface of the cylindrical structure of the rear sleeve 11, and two block-shaped protruding structures 1101 are symmetrically arranged along the circumference. The protruding structure 1101 extends downward and is matched with the upper notch that is spliced ​​with the first nut 31 and the second nut 32.

[0055] The working principle of this embodiment is as follows: The return spring 51 of the elastic reset unit 5 is in a compressed state, continuously applying radially inward compressive force to the first nut 31 and the second nut 32 of the split nut unit 3, causing the two nuts to fit together. This allows the semi-threaded structures inside the two nuts to splice together to form a complete internal thread ring, which engages with the external thread section 102 of the chuck body 1, achieving rotational drive. At this time, the locking assembly forms a threaded locking engagement with the chuck body 1, preventing rapid axial movement. When it is necessary to quickly adjust the clamping range of the jaw 21 to accommodate workpieces of different diameters, the operator presses the pressing part of the top pin 41 of the trigger unit 4 on both sides from the opening slot 1001 on the outside of the front sleeve 10, causing the top pin 41 to move radially inward along the locking base 7. The wedge-shaped protrusion at the inner end of the top pin 41 inserts into the V-shaped splicing gap between the first nut 31 and the second nut 32, using the wedge-shaped driving slope to push the two nuts radially outward, causing the internal thread 33 of the split nut unit 3 to disengage from the external thread section 102 of the chuck body 1, achieving thread release.

[0056] After the thread engagement is released, the locking assembly can be freely dragged along the axial direction of the chuck body 1. At the same time, the connecting washer 8 drives the jaw mechanism 2 to move within the jaw inclined hole 104 of the chuck body 1, realizing rapid adjustment of the clamping range without the need for fine-tuning by rotating the thread. After adjusting to the target position, the top pin 41 is released, and the spring 42 of the trigger unit 4 drives the top pin 41 to automatically spring back and reset. The first nut 31 and the second nut 2 re-engage under the elastic restoring force of the return spring 51, and the internal thread engages and locks with the external thread section 102 again, completing the rapid positioning of the jaw position.

[0057] When the clamping range of the gripper 21 needs to be adjusted, press the top pin 41 of the locking assembly to disengage the two half nuts. The locking assembly can then be dragged, thereby moving the gripper 21 to the desired clamping range position. Release the top pin 41, and the half nuts will close. At this time, the front sleeve 10 can be rotated to lock. During the entire adjustment and locking process, the constraint track and limiting groove on the locking base 7 cooperate with the limiting protrusion of the split nut unit 3 to ensure that its opening and closing motion trajectory is stable and does not deflect circumferentially. The limiting sleeve 61 and the outer ring 9 provide radial limiting and axial positioning for the trigger unit 4 and the elastic reset unit 5 to ensure reliable structural action and stable overall operation.

[0058] This invention provides a simple and reliable quick-positioning chuck that can quickly position the jaws to the required clamping range for pre-clamping. The invention utilizes an openable split nut and an elastic reset unit that automatically engage, locking and releasing the chuck body's external thread. When the chuck needs to clamp an object of a certain diameter, the jaws can be dragged to the corresponding clamping range position via a trigger unit, achieving rapid positioning. Furthermore, through the cooperation of the split nut unit and the trigger unit, pressing the trigger releases the thread engagement, and releasing it automatically resets and locks the chuck. This eliminates the need for repeated rotational fine-tuning of the locking components; the chuck can be directly dragged along the axial direction of the chuck body to the target clamping position, enabling rapid adjustment and positioning of the jaws' clamping range. This significantly shortens clamping time and improves workpiece clamping and change efficiency. Under normal conditions, the return spring continuously provides radial preload, keeping the split nut unit in a closed state. The stable engagement of the internal and external threads effectively compensates for thread clearance, providing excellent anti-loosening performance. Even under vibration conditions, it maintains reliable locking, improving the chuck's operational stability. By cooperating with the constraint track and limiting groove on the locking base and the limiting protrusion of the split nut unit, the opening and closing movement of the split nut is precisely guided and limited, avoiding radial and circumferential offset and ensuring the consistency of opening and closing actions; at the same time, the limiting sleeve, outer ring and other components constrain the triggering and reset structure, resulting in smooth overall operation and low failure rate.

[0059] This invention's locking assembly integrates a split nut, trigger unit, elastic reset unit, and limiting structure into a single, compact, ring-shaped layout. It boasts high axial and radial space utilization, a regular shape, and direct compatibility with existing installation structures, facilitating use in confined spaces. Adjustment is achieved with a single hand, requiring only pressing and dragging, making operation intuitive and effortless. All components are coaxially nested and symmetrically arranged, ensuring clear assembly and positioning without complex transmission structures. Both the trigger unit and elastic reset unit are modularly arranged, facilitating disassembly, replacement, and subsequent maintenance, reducing operating costs. This invention can accommodate the clamping needs of workpieces with various diameters, directly replacing traditional threaded locking chucks, exhibiting strong versatility and interchangeability, and is applicable to a wide range of scenarios.

[0060] In the description of this invention, it should be understood that terms such as “length”, “width”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, and “outer” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and 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. Therefore, they should not be construed as limitations on this application.

[0061] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0062] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A quick-positioning chuck, comprising a chuck body and a gripper mechanism, characterized in that, A locking assembly is connected to the chuck body. The locking assembly includes a segmented nut unit that can be spliced ​​to form a complete internal thread, a trigger unit, and an elastic reset unit. A limiting member that restricts the radial degree of freedom of the locking assembly is connected to the outer periphery of the locking assembly. The elastic reset unit is used to squeeze the segmented nut units to fit together, so that the internal thread formed by the splicing of the segmented nut units engages with the external thread on the chuck body. The trigger unit can change the closed state of the segmented nut units.

2. The quick positioning chuck according to claim 1, characterized in that, The locking component is sleeved on the outer periphery of the chuck body. The gripper mechanism is connected to the locking component. The locking component is coaxially arranged with the chuck body. The locking component can move along the axial direction of the chuck body, thereby driving the gripper mechanism to adjust the clamping range.

3. A quick positioning chuck according to claim 2, characterized in that, The locking assembly further includes a locking base, which includes a base plate and a plurality of boss structures extending axially along the base plate. A constraint track is provided between adjacent boss structures to restrict the movement of the segmented nut unit and the trigger unit. The constraint track is provided with a slot and a segment receiving groove for accommodating the segmented nut unit.

4. A quick positioning chuck according to claim 3, characterized in that, The segmented nut unit includes a first nut and a second nut that are spliced ​​together. The first nut and the second nut are semi-annular nut segments that can be opened and closed radially. The outer side of the first nut and the second nut is provided with a snap-fit ​​part that is movably connected to the locking base. The inner side of the boss structure is provided with a snap-fit ​​mating part that is adapted to the snap-fit ​​part.

5. A quick positioning chuck according to claim 2, characterized in that, The elastic reset unit is disposed between the outer periphery of the split nut unit and the inner wall of the limiting member. The elastic reset unit includes a reset spring. The first end of the reset spring is connected to the split nut unit, and the second end of the reset spring is connected to the limiting member. The outer periphery of the split nut unit is provided with a guide portion connected to the reset spring, and the guide portion is provided with a guide pin.

6. A quick positioning chuck according to claim 2, characterized in that, The segmented nut unit has a splicing gap on the outer periphery of the segmented part, and the splicing gap is located in the axial middle section of the splicing part. The triggering unit includes a pushing component, which has a protruding end and a pressing part. The protruding end can be inserted into the splicing gap of the segmented nut unit to separate the segmented nut unit.

7. A quick positioning chuck according to claim 6, characterized in that, The triggering unit further includes a limiting component, which is connected to the pushing component. The limiting component is an elastic structure, and it engages with the pushing component through a groove structure to apply a radially outward elastic preload to the pushing component.

8. A quick positioning chuck according to claim 2, characterized in that, The limiting member is provided with a limiting sleeve, and the lower end face of the limiting sleeve is provided with an annular limiting end face; the locking assembly further includes a connecting gasket, which is disposed on the inner circumference of the limiting sleeve and connected to the annular limiting end face. The connecting gasket is provided with a connecting part; the end of the gripper mechanism is provided with a connecting mating part, and the gripper is connected to the connecting part through the connecting mating part.

9. A quick positioning chuck according to claim 2, characterized in that, It also includes a front sleeve, the outer periphery of which is provided with an opening groove adapted to the trigger unit.

10. A quick positioning chuck according to any one of claims 1-9, characterized in that, The outer periphery of the limiting member is fitted with an outer ring, and the outer ring is provided with a slot structure adapted to the trigger unit.

Images