Power handle

Abstract

The utility model discloses a power handle which comprises an installation assembly and a driving mechanism, and an installation cavity is formed in the installation assembly. The driving mechanism comprises a driving assembly and a clamping assembly, the clamping assembly comprises a clamping body, a sleeve, a first elastic piece and an abutting piece, and the sleeve is arranged on the clamping body in a sleeving mode and can move relative to the clamping body in the axial direction of the sleeve; wherein the first elastic piece comprises a plurality of disc springs, the disc springs are stacked in the axial direction of the sleeve and arranged on the clamping body in a sleeving mode, the disc springs have a compression state generating elastic deformation and abut against the position between the sleeve and the driving assembly, and the abutting piece is arranged on the clamping body and located on the side, away from the first elastic piece, of the sleeve. The first elastic piece can push the sleeve to move to make contact with the abutting piece so that the abutting piece can move towards the interior of the clamping body in the radial direction of the sleeve. The clamping assembly solves the problems that the clamping stability of the clamping assembly is poor, and clamping failure is prone to occurring.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and more specifically, to a powered handpiece. Background Technology

[0002] A medical power handle is a device used to perform grinding, planing, boring, and other operations on surgical sites (such as the spine and bones) by clamping different grinding heads. A power handle typically includes a clamping assembly for holding the grinding head and a power unit installed inside the handle cavity. The power unit drives the grinding head held by the clamping assembly to rotate at high speed. However, existing clamping assemblies have poor clamping stability and are prone to clamping failure. Utility Model Content

[0003] The main objective of this application is to provide a power handle to solve the problem of poor clamping stability and easy clamping failure of clamping components in the prior art.

[0004] According to one aspect of this application, a power handle is provided, comprising:

[0005] The mounting component has a mounting cavity within it;

[0006] A driving mechanism, comprising a driving component and a clamping component, both of which are installed in the mounting cavity. The clamping component comprises a clamping body, a sleeve, a first elastic element, and an abutment element. The clamping body is connected to the driving component and can rotate under the drive of the driving component. The sleeve is sleeved on the clamping body and can move relative to the clamping body along its own axis.

[0007] The first elastic element includes multiple disc springs, which are stacked along the axial direction of the sleeve and sleeved on the clamping body. The multiple disc springs are in a compressed state that produces elastic deformation and abut against the sleeve and the driving assembly. The abutting member is disposed on the clamping body and located on the side of the sleeve away from the first elastic element. The first elastic element can push the sleeve to move to contact the abutting member so that the abutting member moves radially toward the inside of the clamping body along the sleeve.

[0008] Furthermore, the outer contour of the disc spring along the longitudinal section of the sleeve axis is tapered, the disc spring has a width along the radial direction of the sleeve, and along the axial direction of the sleeve, the width of at least two adjacent disc springs on the side closer to each other is smaller than the width on the side farther from each other, and / or, the width of at least two adjacent disc springs on the side closer to each other is larger than the width on the side farther from each other.

[0009] Furthermore, the disc spring has a width along the radial direction of the sleeve, and the disc spring includes a first disc spring and a second disc spring arranged adjacent to each other. Along the axial direction of the sleeve, the first disc spring and the second disc spring are stacked together to form a mating structure, and the width of the first disc spring and the second disc spring on the side closer to each other is smaller than the width on the side farther away from each other. The mating structure includes multiple sets, and the multiple sets of mating structures are stacked sequentially along the axial direction of the sleeve.

[0010] Furthermore, the clamping body includes:

[0011] A drive shaft is connected to the drive assembly. A stop structure is provided on the side of the drive shaft close to the drive assembly along its own axial direction. The side of the first elastic member away from the sleeve abuts against the stop structure.

[0012] A transmission sleeve is connected to the transmission shaft. Along the axial direction of the transmission shaft, a clamping hole is provided inside the transmission sleeve. Along the radial direction of the transmission shaft, a plurality of holes are provided in the side wall of the transmission sleeve. The plurality of holes are arranged at intervals along the circumference of the transmission shaft and communicate with the clamping hole. The abutment is disposed in the holes and can reciprocate along the radial direction of the transmission shaft.

[0013] Furthermore, the stop structure includes:

[0014] A first groove is disposed on the surface of the drive shaft and extends circumferentially along the drive shaft;

[0015] A baffle plate, which is sleeved on the drive shaft and at least partially embedded in the first groove;

[0016] A stop block is disposed on the drive shaft and located between the disc spring and the stop plate. Along the axial direction of the drive shaft, the projected outer contour of the stop block is not smaller than the projected outer contour of the disc spring.

[0017] Furthermore, along the axial direction of the drive shaft, the projected outer contour of the stop block is an annular structure; and / or, the stop block is provided with a second groove on the side near the baffle, and the baffle abuts against the bottom of the second groove.

[0018] Furthermore, the abutment is a column adapted to the hole, and a guide structure is provided between the sleeve and the abutment. The sleeve pushes the abutment to reciprocate radially along the transmission shaft through the guide structure. The guide structure includes:

[0019] An inner conical surface is provided on the inner surface of the sleeve near the abutment member, and the diameter of the inner conical surface gradually increases in the direction away from the drive assembly;

[0020] An outer conical surface is located along the axial direction of the column and is situated at one end of the column near the inner conical surface. The length of the outer conical surface along the radial direction of the column gradually decreases in the direction away from the clamping hole.

[0021] Furthermore, the mounting assembly includes a first housing and a second housing, and the power handle further includes an adjustment assembly, which includes:

[0022] A rotating sleeve is installed between the first housing and the second housing and surrounds the first housing and the second housing to form the mounting cavity. The rotating sleeve has a guide hole in its side wall that communicates with the mounting cavity. The guide hole extends in a spiral shape.

[0023] A toggle component, comprising a knob, a roller, and a limiting member, wherein the knob is sleeved on the outside of the rotating sleeve and can rotate about the axis of the drive shaft, the roller is located in the guide hole, and the limiting member is disposed between the sleeve and the roller and can move along the axial direction of the drive shaft; the limiting member has a first position to which the sleeve is separated from the abutment and a second position to which the sleeve can abut against the abutment; the knob drives the roller to move the limiting member between the first position and the second position.

[0024] A second elastic element is provided between the limiting member and the rotating sleeve. When the limiting member is in the second position, the second elastic element applies a force toward the first elastic element to the limiting member along the axial direction of the transmission shaft.

[0025] Furthermore, the sleeve has a stop protrusion on the side near the first elastic member, and the inner wall of the rotating sleeve has a stepped surface on the side near the second housing. The limiting member is located between the stop protrusion and the stepped surface, and the second elastic member is located between the limiting member and the stepped surface.

[0026] Furthermore, the second elastic element includes a compression spring, which is sleeved on the sleeve.

[0027] In this application, the drive mechanism of the power handle includes a drive assembly and a clamping assembly. Both the drive assembly and the clamping assembly are installed within the mounting cavity of the mounting assembly. The clamping assembly includes a clamping body, a sleeve, a first elastic element, and an abutment. The clamping body is connected to the drive assembly and can rotate under the drive of the drive assembly. The sleeve is sleeved on the clamping body and can move relative to the clamping body along its own axial direction. The first elastic element includes multiple disc springs, which are stacked along the axial direction of the sleeve and sleeved on the clamping body. The disc springs are in a compressed state that produces elastic deformation and abut against the sleeve and the drive assembly to apply a thrust away from the drive assembly to the sleeve. An abutment is disposed in the clamping body and located on the side of the sleeve away from the first elastic member. The first elastic member can push the sleeve to contact the abutment, causing the abutment to move radially into the clamping body along the sleeve. Since at least a portion of the grinding part will penetrate into the clamping body, the abutment can move into the clamping body to abut against the grinding part, thereby clamping the grinding part in the power handle. When the first elastic member of the power handle in this application is a stacked disc spring, the disc spring can withstand a larger load and has strong fatigue resistance. It can withstand the cyclic stress repeatedly applied to the first elastic member by the reciprocating movement of the sleeve, thus reducing the likelihood of breakage, weakening of elasticity, or even failure, thereby improving the clamping stability of the clamping assembly for the grinding part. At the same time, due to the thinness of the disc spring, the multi-layered disc spring can make full use of the limited space of the mounting cavity while providing high elasticity. It is also simple and convenient to assemble, requiring no complex guiding device, thus reducing assembly time and cost. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a schematic diagram of the appearance of a power handle provided in an embodiment of the present utility model;

[0030] Figure 2 for Figure 1 Top view;

[0031] Figure 3 for Figure 2 AA section view;

[0032] Figure 4 for Figure 3 Enlarged schematic diagram of part B;

[0033] Figure 5 This is a schematic diagram of the rotating sleeve in the power handle.

[0034] Figure 6 This is a schematic diagram of the assembly of the transmission sleeve and the abutment component.

[0035] The above figures include the following reference numerals:

[0036] 10. Mounting assembly; 101. Mounting cavity; 11. First housing; 12. Second housing; 20. Drive assembly; 21. Connecting rod; 22. Connecting shaft; 23. Gear transmission component; 24. First bearing; 25. Retaining ring; 30. Clamping assembly; 31. Clamping body; 311. Drive shaft; 312. Drive sleeve; 3121. Clamping hole; 3122. Hole; 32. Sleeve; 321. Inner conical surface; 32 2. Stop protrusion; 33. First elastic element; 331. Disc spring; 34. Abutment element; 341. Outer conical surface; 40. Stop structure; 41. First groove; 42. Baffle plate; 43. Stop block; 431. Second groove; 50. Adjustment component; 51. Rotating sleeve; 511. Guide hole; 512. Stepped surface; 52. Knob; 53. Collar; 531. First slide groove; 60. Second elastic element; 70. Grinding part. Detailed Implementation

[0037] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0040] To address the problem of poor clamping stability and easy clamping failure in existing clamping components 30, this utility model provides a power handle as the first implementation. Please refer to [link / reference needed]. Figures 1 to 6 The power handle includes a mounting assembly 10 and a drive mechanism. The mounting assembly 10 has a mounting cavity 101. The drive mechanism includes a drive assembly 20 and a clamping assembly 30, both of which are mounted in the mounting cavity 101. The clamping assembly 30 includes a clamping body 31, a sleeve 32, a first elastic element 33, and an abutment element 34. The clamping body 31 is connected to the drive assembly 20 and can rotate under the drive of the drive assembly 20. The clamping body 31 is used to clamp the grinding workpiece 70 to drive the grinding workpiece 70 to rotate and perform operations such as grinding, planing, and boring on the surgical site.

[0041] In this embodiment, the power handle can be either a curved handle or a straight handle. A curved handle is one where the handle section containing the drive assembly 20 has a bent structure. The curved handle can be used with an endoscope and inserted into the surgical site. A straight handle can be directly inserted into the body for surgical procedures. When the power handle is a curved handle, the drive assembly 20 may include a connecting rod 21, a connecting shaft 22, and a gear transmission component 23. One end of the connecting rod 21 is connected to the connecting shaft 22. The connecting shaft 22 is connected to the clamping assembly 30 via the gear transmission component 23. The connecting rod 21 can be connected to the output shaft of a motor, so that the connecting shaft 22 rotates around its own axis under motor drive. The gear transmission component 23 is used to transmit the rotational kinetic energy of the connecting shaft 22 to the clamping assembly 30 to drive the clamping assembly 30 to rotate. When the power handle is a straight handle, the installation of the gear transmission component 23 can be omitted; the connecting shaft 22 and the clamping body 31 of the clamping assembly 30 can be directly connected together.

[0042] like Figure 3As shown, the sleeve 32 is fitted onto the clamping body 31 and can move relative to the clamping body 31 along its own axial direction. The first elastic element 33 includes multiple disc springs 331, which are stacked along the axial direction of the sleeve 32 and fitted onto the clamping body 31. The disc springs 331 are in a compressed state that produces elastic deformation and abut against the sleeve 32 and the drive assembly 20. The compressed disc springs 331 can continuously apply a thrust to the sleeve 32. An abutment 34 is disposed on the clamping body 31 and located on the side of the sleeve 32 away from the first elastic element 33. The first elastic element 33 can push the sleeve 32 to contact the abutment 34, causing the abutment 34 to move radially inward into the clamping body 31 along the sleeve 32. In this embodiment, the first elastic element 33 is obtained by sleeved multiple disc springs 331 on the clamping body 31. This not only facilitates assembly, but also improves the clamping stability of the clamping assembly 30 on the grinding workpiece 70, given that the disc springs 331 can withstand greater loads, have strong fatigue resistance, and are less prone to breakage, weakening of elasticity, or even failure. Furthermore, the stacked arrangement of multiple disc springs 331 also improves the space utilization of the mounting cavity 101, making the overall structure of the clamping assembly 30 of the power handle more compact and reliable.

[0043] As can be seen, in this embodiment, the drive mechanism of the power handle includes a drive assembly 20 and a clamping assembly 30. Both the drive assembly 20 and the clamping assembly 30 are installed in the mounting cavity 101 of the mounting assembly 10. The clamping assembly 30 includes a clamping body 31, a sleeve 32, a first elastic element 33, and an abutment 34. The clamping body 31 is connected to the drive assembly 20 and can rotate under the drive of the drive assembly 20. The sleeve 32 is sleeved on the clamping body 31 and can move relative to the clamping body 31 along its own axial direction. The first elastic element 33 includes multiple disc springs 331. The multiple disc springs 331 are stacked along the axial direction of the sleeve 32 and sleeved on the clamping body 31. The multiple disc springs 331 have a compressed state that produces elastic deformation and abut against the sleeve 32 and the drive assembly 20 to apply a thrust away from the drive assembly 20 to the sleeve 32. The abutment 34 is disposed on the clamping body 31 and located on the side of the sleeve 32 away from the first elastic member 33. The first elastic member 33 can push the sleeve 32 to move to contact the abutment 34 so that the abutment 34 moves radially toward the inside of the clamping body 31 along the sleeve 32. Since at least a portion of the grinding part 70 will penetrate into the clamping body 31, the abutment 34 can move toward the inside of the clamping body 31 to abut against the grinding part 70, thereby clamping the grinding part 70 in the power handle. In this embodiment, when the first elastic member 33 of the power handle is a stacked disc spring 331, the disc spring 331 can withstand a larger load and has strong fatigue resistance. It can withstand the cyclic stress repeatedly applied to the first elastic member 33 by the back-and-forth movement of the sleeve 32. Therefore, it is not easy to break, weaken the elasticity or even fail, which can improve the clamping stability of the clamping assembly 30 for the grinding part 70. At the same time, because the disc spring 331 is thin, the multi-layered disc spring 331 can make full use of the limited space of the mounting cavity 101 while providing high elasticity. It is also simple and convenient to assemble, without the need for complex guiding devices, which can reduce assembly time and cost.

[0044] In this embodiment, the outer contour of the longitudinal section of the disc spring 331 along the axial direction of the sleeve 32 is tapered. The disc spring 331 has a width along the radial direction of the sleeve 32. Along the axial direction of the sleeve 32, the width of at least two adjacent disc springs 331 on the side closer to each other is smaller than the width on the side farther from each other, and / or, the width of at least two adjacent disc springs 331 on the side closer to each other is larger than the width on the side farther from each other. Thus, by stacking two adjacent disc springs 331 together in the above manner, this embodiment ensures that the first elastic member 33 can generate a strong elastic force to push the sleeve 32 into contact with the abutment member 34, thereby stably pushing the abutment member 34 to press the grinding member 70 against the clamping body 31, resulting in a robust and reliable overall structure.

[0045] In this embodiment, the disc spring 331 includes a first disc spring and a second disc spring arranged adjacent to each other. Along the axial direction of the sleeve 32, the first and second disc springs are stacked together to form a mating structure, with the width of the side of the first and second disc springs closer to each other being smaller than the width of the side farther from each other. Multiple sets of mating structures are stacked sequentially along the axial direction of the sleeve 32. Thus, in the first elastic member 33 composed of multiple sets of mating structures, a V-shaped deformation groove is formed between the first and second disc springs in each set of mating structures. The V-shaped deformation groove extends circumferentially along the disc spring 331, enabling the first elastic member 33 to obtain a larger deformation amount. The second disc spring in one set of mating structures is stacked with the first disc spring in an adjacent set of mating structures, improving the overall stiffness of the first elastic member 33. Therefore, this embodiment, through the aforementioned stacked structure, can improve the overall elasticity of the first elastic member 33 while ensuring the structural strength and stability of the first elastic member 33. In this embodiment, the number of mating structures is no less than seven sets, such as seven sets, eight sets, nine sets, etc., thereby increasing the deformation of the first elastic member 33 through no less than seven sets of mating structures.

[0046] like Figure 3 As shown, the clamping body 31 in this embodiment includes a drive shaft 311 and a drive sleeve 312. The drive shaft 311 is connected to the drive assembly 20. A stop structure 40 is provided on the side of the drive shaft 311 closest to the drive assembly 20 along its own axial direction. The side of the first elastic member 33 away from the sleeve 32 abuts against the stop structure 40. The drive sleeve 312 is connected to the drive shaft 311. A clamping hole 3121 is provided in the drive sleeve 312 along the axial direction of the drive shaft 311. The grinding member 70 is adapted to the clamping hole 3121 and passes through the clamping hole 3121. A plurality of holes 3122 are provided in the side wall of the drive sleeve 312 along the radial direction of the drive shaft 311. The plurality of holes 3122 are arranged at intervals along the circumference of the drive shaft 311 and communicate with the clamping hole 3121. The abutment member 34 is provided in the hole 3122 and can reciprocate along the radial direction of the drive shaft 311.

[0047] Therefore, in this embodiment, after the multi-leaf disc springs 331 are sleeved on the clamping body 31, the side of the multi-leaf disc springs 331 away from the sleeve 32 abuts against the stop structure 40, and the side closer to the sleeve 32 abuts against the sleeve 32, making assembly efficient and convenient. Thus, the first elastic member 33 can push the sleeve 32 away from the stop structure 40 under its own elastic force until it contacts the abutting member 34, so that the abutting member 34 moves radially to abut against the grinding part 70 in the clamping hole 3121, thereby firmly clamping the grinding part 70 in the clamping hole 3121.

[0048] like Figure 4As shown, the stop structure 40 in this embodiment includes a first groove 41, a baffle 42, and a stop block 43. The first groove 41 is disposed on the surface of the drive shaft 311 and extends circumferentially along the drive shaft 311, making it easy to process. The baffle 42 is sleeved on the drive shaft 311 and at least partially embedded in the first groove 41, making assembly easy. The stop block 43 is disposed on the drive shaft 311 and located between the disc spring 331 and the baffle 42. Along the axial direction of the drive shaft 311, the projected outer contour of the stop block 43 is not smaller than the projected outer contour of the disc spring 331. Therefore, in this embodiment, by machining a first groove 41 on the drive shaft 311, then at least partially embedding the baffle 42 into the first groove 41 and abutting the stop block 43 against the side of the first groove 41 away from the drive assembly 20, the overall structure is robust and reliable when the stop block 43 abuts against the disc spring 331. This prevents the stop structure 40 from failing due to excessive elasticity of the first elastic element 33 formed by the disc spring 331, thereby improving the overall service life of the clamping assembly 30.

[0049] Along the axial direction of the drive shaft 311, the projected outer contour of the stop block 43 is an annular structure. Therefore, by creating corresponding holes within the annular stop block 43, it can be fitted onto the drive shaft 311. The annular stop block 43 also provides support to various circumferential parts of the disc spring 331, preventing stress concentration in localized areas and ensuring the structural strength and stability of the disc spring 331 that abuts against the stop block 43. A second groove 431 is provided on the side of the stop block 43 near the baffle plate 42, and the baffle plate 42 abuts against the bottom of the second groove 431. Thus, when the stop block 43 abuts between the baffle plate 42 and the disc spring 331, the baffle plate 42 is positioned within the second groove 431, resulting in better compactness of the stop structure 40, providing more space for the installation of other components of the power handle, and improving the space utilization of the mounting cavity 101.

[0050] For example, to improve the stability of the drive shaft 311 during operation, the power handle in this embodiment may also include a first bearing 24 and a retaining ring 25, such as... Figure 3 and Figure 4As shown, both the first bearing 24 and the retaining ring 25 are sleeved on the drive shaft 311. The first bearing 24 is located on the side of the stop structure 40 near the drive assembly 20. Since the stop structure 40 is relatively compact, it can reserve enough space for the installation of the first bearing 24. Secondly, the retaining ring 25 in this embodiment is provided with a clearance hole. Along the radial direction of the drive shaft 311, the maximum width of the clearance hole (when the clearance hole is a circular hole, the maximum width is the diameter of the clearance hole) is not less than the maximum width of the stop block 43 (when the outer contour of the projection of the stop block 43 along the axial direction of the drive shaft 311 is circular, the maximum width is the outer diameter of the stop block 43). Therefore, the retaining ring 25 can be directly sleeved on the outside of the stop block 43 through its clearance hole, which improves the stability of the first bearing 24 and makes the retaining ring 25 and the stop structure 40 located in the same space, further improving the space utilization of the mounting cavity 101 and making the overall structure of the clamping assembly 30 more stable and reliable.

[0051] like Figure 6 As shown, in this embodiment, the abutment 34 is a cylinder adapted to the hole 3122. A guide structure is provided between the sleeve 32 and the abutment 34. The sleeve 32 pushes the abutment 34 to reciprocate radially along the drive shaft 311 through the guide structure. The guide structure in this embodiment includes an inner conical surface 321 and an outer conical surface 341. The inner conical surface 321 is disposed on the inner surface of the sleeve 32 near the abutment 34, and the diameter of the inner conical surface 321 gradually increases in the direction away from the drive assembly 20. Along the axial direction of the cylinder, the outer conical surface 341 is disposed at the end of the cylinder near the inner conical surface 321, and the length of the outer conical surface 341 along the radial direction of the cylinder gradually decreases in the direction away from the clamping hole 3121. Therefore, as the sleeve 32 moves closer to the abutment 34, its inner conical surface 321 contacts the outer conical surface 341 of the abutment 34, gradually pushing the column to abut against the grinding part 70 in the clamping hole 3121, thereby clamping the grinding part 70 within the clamping hole 3121. When the sleeve 32 is pulled away from the abutment 34 until the inner conical surface 321 and the outer conical surface 341 separate, the clamping force applied by the column to the grinding part 70 is released, allowing the grinding part 70 to be removed.

[0052] To facilitate the removal of the ground part 70, the mounting assembly 10 in this embodiment includes a first housing 11 and a second housing 12. The power handle also includes an adjustment assembly 50, which includes a rotating sleeve 51 and a toggle component. The rotating sleeve 51 is installed between the first housing 11 and the second housing 12 and forms a mounting cavity 101 with the first housing 11 and the second housing 12. A guide hole 511 communicating with the mounting cavity 101 is provided in the side wall of the rotating sleeve 51, and the guide hole 511 extends in a spiral shape. The actuating component includes a knob 52, a rolling element, and a limiting element. The knob 52 is sleeved on the outside of the rotating sleeve 51 and can rotate around the axis of the drive shaft 311. The rolling element is located in the guide hole 511. The limiting element is disposed between the sleeve 32 and the rolling element and can move along the axial direction of the drive shaft 311. The limiting element has a first position where it moves to separate the sleeve 32 from the abutment 34 and a second position where the sleeve 32 can abut against the abutment 34. The knob 52 drives the rolling element to move the limiting element between the first position and the second position.

[0053] In this embodiment, the rolling element can specifically be a steel ball. The limiting element is a collar 53 sleeved on the sleeve 32. A first groove 531 is provided on the surface of the collar 53 near the steel ball, such as... Figure 3 As shown, the first groove 531 extends circumferentially along the collar 53, and the inner wall of the knob 52 is provided with a second groove. The length of the second groove extends axially along the collar 53. The steel ball passes through the guide hole 511 and is simultaneously movably embedded in the first groove 531 and the second groove. A stop protrusion 322 is provided at the end of the sleeve 32 near the disc spring 331, and the stop protrusion 322 extends circumferentially along the sleeve 32. The collar 53 is located on the side of the stop protrusion 322 away from the disc spring 331. The steel ball moves axially in the second groove and moves circumferentially in the first groove 531 under the guidance of the guide hole 511. During the circumferential rotation of the external knob 52, the steel ball drives the collar 53 to move axially under the guidance of the guide hole 511. When the collar 53 abuts against the stop protrusion 322, it drives the sleeve 32 to move away from the abutting part 34, so as to conveniently release and remove the grinding part 70. When the sleeve 32 abuts against the abutment member 34 under the abutment of the disc spring 331 to clamp the grinding workpiece 70, a gap of not less than 0.02mm (such as a gap of 0.02mm, 0.03mm, etc.) can be reserved between the collar 53 and the stop protrusion 322 along the axial direction of the sleeve 32, so as to prevent the sleeve 32 from not rotating with the clamping body 31.

[0054] A second elastic element 60 is provided between the limiting member and the rotating sleeve 51. When the limiting member is in the second position, the second elastic element 60 applies a force toward the first elastic element 33 along the axial direction of the transmission shaft 311. This balances the elastic force of the first elastic element 33, ensuring that the limiting member does not shift under the elastic force of the first elastic element 33, thus improving the stability of the adjusting assembly 50.

[0055] A stop protrusion 322 is provided on the side of the sleeve 32 near the first elastic member 33, and a stepped surface 512 is provided on the inner wall surface of the rotating sleeve 51 near the second housing 12. A limiting member is located between the stop protrusion 322 and the stepped surface 512, and a second elastic member 60 is disposed between the limiting member and the stepped surface 512. In this embodiment, by disposing the second elastic member 60 between the limiting member and the stepped surface 512 inside the rotating sleeve 51, the installation of the second elastic member 60 can be achieved simply by machining the required stepped surface 512 inside the rotating sleeve 51, without the need for an additional stop structure 40. This results in efficient and convenient assembly and low cost.

[0056] In this embodiment, the second elastic element 60 includes a compression spring, which is sleeved on the sleeve 32. Thus, by sleeved on the sleeve 32, the compression spring can be abutted between the limiting member and the stepped surface 512 while the sleeve 32, the clamping body 31, and the limiting member are assembled, making assembly efficient and convenient.

[0057] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0058] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0059] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A power handle, characterized in that, include: Mounting assembly (10), wherein a mounting cavity (101) is provided within the mounting assembly (10); The driving mechanism includes a driving component (20) and a clamping component (30). Both the driving component (20) and the clamping component (30) are installed in the mounting cavity (101). The clamping component (30) includes a clamping body (31), a sleeve (32), a first elastic element (33), and an abutment element (34). The clamping body (31) is connected to the driving component (20) and can rotate under the drive of the driving component (20). The sleeve (32) is sleeved on the clamping body (31) and can move relative to the clamping body (31) along its own axis. The first elastic element (33) includes multiple disc springs (331), which are stacked along the axial direction of the sleeve (32) and sleeved on the clamping body (31). The multiple disc springs (331) are in a compressed state that generates elastic deformation and abut against the sleeve (32) and the drive assembly (20). The abutting member (34) is disposed on the clamping body (31) and located on the side of the sleeve (32) away from the first elastic element (33). The first elastic element (33) can push the sleeve (32) to move to contact the abutting member (34) so ​​that the abutting member (34) moves radially toward the inside of the clamping body (31) along the sleeve (32).

2. The power handle according to claim 1, characterized in that, The outer contour of the disc spring (331) along the longitudinal section of the sleeve (32) is tapered. The disc spring (331) has a width along the radial direction of the sleeve (32). Along the axial direction of the sleeve (32), the width of at least two adjacent disc springs (331) on the side closer to each other is smaller than the width on the side farther from each other, and / or the width of at least two adjacent disc springs (331) on the side closer to each other is larger than the width on the side farther from each other.

3. The power handle according to claim 1, characterized in that, The disc spring (331) has a width along the radial direction of the sleeve (32). The disc spring (331) includes a first disc spring and a second disc spring arranged adjacent to each other. Along the axial direction of the sleeve (32), the first disc spring and the second disc spring are stacked together to form a mating structure. The width of the first disc spring and the second disc spring on the side closer to each other is smaller than the width on the side farther away from each other. The mating structure includes multiple sets, and the multiple sets of mating structures are stacked sequentially along the axial direction of the sleeve (32).

4. The power handle according to any one of claims 1 to 3, characterized in that, The clamping body (31) includes: A drive shaft (311) is connected to the drive assembly (20). A stop structure (40) is provided on the side of the drive shaft (311) close to the drive assembly (20) along its own axial direction. The first elastic member (33) abuts against the stop structure (40) on the side away from the sleeve (32). A transmission sleeve (312) is connected to the transmission shaft (311). Along the axial direction of the transmission shaft (311), the transmission sleeve (312) is provided with a clamping hole (3121). Along the radial direction of the transmission shaft (311), the side wall of the transmission sleeve (312) is provided with a plurality of holes (3122). The plurality of holes (3122) are arranged at intervals along the circumference of the transmission shaft (311) and communicate with the clamping hole (3121). The abutment (34) is disposed in the hole (3122) and can reciprocate along the radial direction of the transmission shaft (311).

5. The power handle according to claim 4, characterized in that, The stop structure (40) includes: A first groove (41) is provided on the surface of the drive shaft (311) and extends circumferentially along the drive shaft (311); A baffle (42) is sleeved on the drive shaft (311) and at least partially embedded in the first groove (41); A stop block (43) is disposed on the transmission shaft (311) and located between the disc spring (331) and the baffle (42). Along the axial direction of the transmission shaft (311), the projected outer contour of the stop block (43) is not smaller than the projected outer contour of the disc spring (331).

6. The power handle according to claim 5, characterized in that, Along the axial direction of the drive shaft (311), the projected outer contour of the stop block (43) is an annular structure; and / or, the stop block (43) is provided with a second groove (431) on the side near the baffle (42), and the baffle (42) abuts against the bottom of the second groove (431).

7. The power handle according to claim 4, characterized in that, The abutment (34) is a column adapted to the hole (3122). A guide structure is provided between the sleeve (32) and the abutment (34). The sleeve (32) pushes the abutment (34) to reciprocate radially along the transmission shaft (311) through the guide structure. The guide structure includes: An inner conical surface (321) is provided on the inner surface of the sleeve (32) near the abutment (34), and the diameter of the inner conical surface (321) gradually increases in the direction away from the drive assembly (20); An outer conical surface (341) is provided along the axial direction of the column. The outer conical surface (341) is located at one end of the column near the inner conical surface (321). The length of the outer conical surface (341) along the radial direction of the column gradually decreases in the direction away from the clamping hole (3121).

8. The power handle according to claim 4, characterized in that, The mounting assembly (10) includes a first housing (11) and a second housing (12), and the power handle further includes an adjustment assembly (50), which includes: A rotating sleeve (51) is installed between the first housing (11) and the second housing (12) and surrounds the first housing (11) and the second housing (12) to form the mounting cavity (101). A guide hole (511) communicating with the mounting cavity (101) is provided in the side wall of the rotating sleeve (51). The guide hole (511) extends in a spiral shape. The actuating component includes a knob (52), a rolling element, and a limiting element. The knob (52) is sleeved on the outside of the rotating sleeve (51) and can rotate around the axis of the transmission shaft (311). The rolling element is located in the guide hole (511). The limiting element is disposed between the sleeve (32) and the rolling element and can move along the axial direction of the transmission shaft (311). The limiting element has a first position where it moves to separate the sleeve (32) from the abutment (34) and a second position where the sleeve (32) can abut against the abutment (34). The knob (52) drives the rolling element to move the limiting element between the first position and the second position. A second elastic element (60) is provided between the limiting member and the rotating sleeve (51). When the limiting member is in the second position, the second elastic element (60) applies a force toward the first elastic element (33) along the axial direction of the transmission shaft (311).

9. The power handle according to claim 8, characterized in that, The sleeve (32) has a stop protrusion (322) on the side near the first elastic member (33), and the inner wall of the rotating sleeve (51) has a stepped surface (512) on the side near the second housing (12). The limiting member is located between the stop protrusion (322) and the stepped surface (512), and the second elastic member (60) is located between the limiting member and the stepped surface (512).

10. The power handle according to claim 9, characterized in that, The second elastic element (60) includes a compression spring, which is sleeved on the sleeve (32).

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