Supporting accessory for abrasive drill handle, abrasive drill handle and abrasive drill device

Abstract

The utility model relates to the technical field of medical apparatus and instruments, in particular to a supporting accessory for an abrasive drill handle, the abrasive drill handle and an abrasive drill device, which comprises a supporting sleeve used for being connected to the front end of a handle body of the abrasive drill handle; the supporting pipe extends out of the front end of the supporting sleeve and can move relative to the axial direction of the supporting sleeve; the adjusting sleeve sleeves the supporting sleeve and can rotate around the axis of the supporting sleeve; and the transmission structure is used for converting the rotary motion of the adjusting sleeve into the axial motion of the supporting tube, so that the length of the front end of the supporting tube, which is exposed out of the supporting sleeve, is correspondingly changed when the adjusting sleeve rotates relative to the supporting sleeve. The exposed length of the cutter is adjusted by rotating the adjusting sleeve, supporting accessories or the cutter do not need to be replaced in the whole process, and operation is easy. Moreover, the whole process does not need cutter plugging, so that the adverse effect of frequent cutter plugging on the service life of the abrasive drill handle is reduced, and the service life of the abrasive drill handle is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a support accessory for a drill handle, a drill handle, and a drill device. Background Technology

[0002] The medical drill handle, once connected to the cutting tool, drives the tool to rotate and cut tissue. The handle has a channel for inserting the cutting tool, which is then connected to the handle via this channel. To adjust the exposed length of the cutting tool for different surgical scenarios, two main methods are currently used:

[0003] One approach is to solve the problem by replacing the cutting tool or support tube with one of a specific length. However, this method involves cumbersome steps, complex operations, low efficiency, and requires a large number of cutting tools or support tubes, resulting in high costs.

[0004] Another method involves setting multiple slots at different axial positions on the cutting tool. By applying force to the cutting tool along the axial direction, the locking mechanism of the medical drill handle is engaged in different slots to adjust the length of the cutting tool. This method allows for adjustment of the exposed length without replacing the cutting tool. However, the cutting tool needs to be removed and inserted each time the length is adjusted, and frequent removal and insertion of the cutting tool will affect the lifespan of the locking structure of the drill handle. Utility Model Content

[0005] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a support accessory for a drill handle, a drill handle, and a drill grinding device, so as to solve the problem of complicated tool changing operation steps in the prior art and reduce the adverse effect of tool length adjustment on the life of the drill handle.

[0006] To achieve the above and other related objectives, this utility model provides a support accessory for a drill handle, comprising:

[0007] Support sleeve, used to connect to the front end of the handle body of the drill handle;

[0008] A support tube is fitted inside the support sleeve. The support tube extends out of the front end of the support sleeve and can move axially relative to the support sleeve. A tool support channel is provided axially inside the support tube.

[0009] An adjusting sleeve, fitted over the outer wall of the support sleeve and operably rotatable about the axis of the support sleeve, the adjusting sleeve being axially fixed relative to the support sleeve; and

[0010] A transmission structure is provided between the support tube and the adjusting sleeve. The transmission structure is used to convert the rotational motion of the adjusting sleeve into the axial motion of the support tube, so that the length of the front end of the support tube protruding from the support sleeve changes accordingly when the adjusting sleeve rotates relative to the support sleeve.

[0011] Optionally, the inner wall of the adjusting sleeve is provided with a spiral groove, and the outer wall of the support tube is provided with a first guide portion that penetrates the support sleeve and is fitted into the spiral groove. An axial guide structure is provided between the support sleeve and the support tube. When the adjusting sleeve rotates relative to the support sleeve, the first guide portion moves in the spiral groove along the extension direction of the spiral groove, thereby driving the support tube to move axially along the support sleeve.

[0012] Optionally, the first guide portion constitutes part of the axial guide structure, and the axial guide structure further includes a guide groove formed on the support sleeve. The guide groove extends along the axial direction of the support sleeve, and the first guide portion is fitted into the guide groove and can move along the extension direction of the guide groove.

[0013] Optionally, the axial guide structure includes a guide groove and a second guide portion, wherein the second guide portion is disposed within the guide groove;

[0014] Wherein, the guide groove is provided on the support sleeve and extends along the axial direction of the support sleeve, and the second guide portion is provided on the support tube; or, the guide groove is provided on the support tube and extends along the axial direction of the support tube, and the second guide portion is provided on the support sleeve.

[0015] Optionally, the first guide portion includes a ball bearing, and the outer wall of the support tube is provided with a receiving space for accommodating the ball bearing. The ball bearing is rotatably disposed in the receiving space, and the ball bearing portion is embedded in the spiral groove.

[0016] Optionally, the first guide portion further includes a protrusion protruding from the outer wall of the support tube, and the receiving space is a receiving hole, which is opened on the surface of the protrusion facing the adjusting sleeve.

[0017] Optionally, the receiving hole is a through hole, and the support tube is provided with a sealing member to prevent the ball from rolling into the interior of the support tube; or, the receiving hole is a blind hole.

[0018] Optionally, along the radial direction of the support tube, any part of the ball extends beyond the outer wall of the support tube; and / or, the receiving hole is a circular hole, and the diameter of the receiving hole is smaller than the diameter of the ball.

[0019] Optionally, an elastic element is provided in the receiving hole, one end of the ball abuts against the elastic element, and the other end abuts against the spiral groove; wherein, the spiral groove is provided with at least two stop grooves communicating with the spiral groove along its own extension direction, so that the operator can feel the stop when the ball falls into the stop groove.

[0020] Optionally, the first guide portion includes a guide protrusion disposed on the outer wall of the support tube.

[0021] Optionally, a retaining ring is fitted on the outer wall of the support sleeve. The retaining ring is axially fixed relative to the support sleeve. A first axial limiting surface is provided on the outer wall of the support sleeve. The retaining ring blocks one end of the adjusting sleeve along the axial direction, and the first axial limiting surface blocks the other end of the adjusting sleeve along the axial direction.

[0022] Optionally, the retaining ring is detachably connected to the front end of the support sleeve and blocks the front end face of the adjusting sleeve, the front end of the spiral groove communicates with the front end face of the adjusting sleeve, and the first guide portion includes a ball partially embedded in the spiral groove.

[0023] Optionally, the support accessory has multiple length adjustment positions, and the support accessory is equipped with a position sensing structure.

[0024] This utility model also provides a drill handle, adapted to a cutting tool, the drill handle comprising:

[0025] The handle body is used to connect with the tool drive and provide rotational power to the tool;

[0026] A support accessory is provided for connection to the front end of the handle body to adjust the exposed length of the cutter, wherein the support accessory is the support accessory described above.

[0027] This utility model also provides a grinding device, which includes a cutting tool and a grinding handle as described above. The handle body is kinetically connected to the cutting tool and provides rotational power to the cutting tool. The cutting tool passes through the support attachment so that the support attachment supports the cutting tool.

[0028] As described above, in the support accessory for a grinding drill handle of this utility model, a support tube is fitted inside a support sleeve, the support tube extends out of the front end of the support sleeve and can move axially relative to the support sleeve. An adjusting sleeve is fitted onto the outer wall of the support sleeve and can be operably rotated about the axis of the support sleeve. A transmission structure is provided between the support tube and the adjusting sleeve. The rotational motion of the adjusting sleeve is converted into the axial motion of the support tube through the transmission structure, so that the length of the front end of the support tube protruding from the front end of the support sleeve changes accordingly when the adjusting sleeve rotates relative to the support sleeve, thereby changing the length of the tool covered by the front end of the support tube, and realizing the adjustable length of the tool protruding from the support tube. The adjustment of the tool protrusion length is achieved by rotating the adjusting sleeve. The entire process does not require replacement of the support accessory or the tool, making the operation simple. Furthermore, the entire process does not require tool insertion or removal, thereby reducing the adverse effects of frequent tool insertion and removal on the life of the grinding drill handle and helping to extend the service life of the grinding drill handle. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0030] Figure 2 This is a schematic diagram of the adjusting sleeve structure according to an embodiment of the present utility model;

[0031] Figure 3 This is a schematic diagram of the support tube structure according to an embodiment of the present utility model;

[0032] Figure 4 This is a perspective view of the support tube according to an embodiment of the present utility model;

[0033] Figure 5 This is a perspective view of the support sleeve according to an embodiment of the present utility model;

[0034] Figure 6 This is an exploded view of the grinding and drilling device according to an embodiment of the present utility model;

[0035] Figure 7 This is a schematic diagram of the support tube of the grinding and drilling device according to an embodiment of the present invention, extended to its longest limit position.

[0036] Figure 8 This is a schematic diagram of the support tube of the grinding and drilling device according to an embodiment of the present invention retracted to its shortest limit position.

[0037] Figure 9 This is a schematic diagram of the adjustment sleeve structure according to another embodiment of the present invention.

[0038] Part Number Explanation

[0039] 1-Support tube; 11-Accommodation space; 12-Protrusion; 2-Support sleeve; 21-Guide groove; 22-First axial limiting surface; 3-Adjusting sleeve; 31-Helical groove; 32-Grip groove; 4-First guide part; 5-Sticking ring; 6-Cut tool; 7-Support accessory; 8-Handle body. Detailed Implementation

[0040] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0041] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show components related to this utility model and are not drawn according to the actual number, shape, and size of the components in implementation. In actual implementation, the form, quantity, and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex. The structures, proportions, sizes, etc., shown in the accompanying drawings are only used to complement the content disclosed in the specification for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in this specification are only for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered as within the scope of implementation of this utility model.

[0042] In the description of the following embodiments, "axial direction" refers to the axial direction of the handle body 8, which is also the axial direction of the entire grinding handle; in the description of the following embodiments, the directional terms "front" and "back" are relative directions, "front" refers to the direction along the axial direction that is closer to the grinding head of the tool 6, and "back" refers to the direction along the axial direction that is farther away from the grinding head of the tool 6.

[0043] It should be noted that the support attachment 7 in the following embodiments is a component of the drill handle, see [link to documentation]. Figures 6 to 8The drill handle typically includes a handle body 8, which is used for transmission connection with the tool 6 and provides rotational power to the tool 6. The handle body 8 can adopt the structure of an existing handle body or a new structure. The structure of the handle body 8 is not the inventive point of this case and will not be described in detail here. The support attachment 7 in the following embodiments is connected to the front end of the handle body 8. Figures 6-8 In the corresponding embodiment, the support attachment 7 is detachably connected to the front end of the handle body 8. In actual implementation, the support attachment 7 can also be directly and integrally connected to the front end of the handle body 8 and cannot be detached. The connection structure between the handle body 8 and the support attachment 7 can adopt an existing structure or a new structure, and it is not part of the inventive point of this case, so it will not be described in detail here.

[0044] Please see Figure 1 This embodiment provides a support accessory 7 for a drill handle, comprising:

[0045] Support sleeve 2 is used to connect to the front end of the handle body 8 of the drill handle;

[0046] Support tube 1 is fitted inside support sleeve 2. Support tube 1 extends out of the front end of support sleeve 2 and can move axially relative to support sleeve 2. A tool support channel is provided axially inside support tube 1.

[0047] Adjusting sleeve 3, which is fitted onto the outer wall of support sleeve 2 and is operably rotatable about the axis of support sleeve 2, is axially fixed relative to support sleeve 2; and

[0048] A transmission structure is provided between the support tube 1 and the adjusting sleeve 3. The transmission structure is used to convert the rotational motion of the adjusting sleeve 3 into the axial motion of the support tube 1, so that the length of the front end of the support tube 1 protruding from the support sleeve 2 changes accordingly when the adjusting sleeve 3 rotates relative to the support sleeve 2.

[0049] The support sleeve 2 has an inner cavity extending along its axial direction, allowing the support tube 1 to pass into the inner cavity of the support sleeve 2, and the front end of the support tube 1 to extend out of the front end of the support sleeve 2. When the support sleeve 2 is connected to the front end of the handle body 8, it can be detachably connected to the front end of the handle body 8, or it can be non-detachably connected to the front end of the handle body 8.

[0050] The support tube 1 has a tool support channel that extends through it along its axis. The tool support channel is connected to the inner cavity of the support sleeve 2, so that when the support accessory 7 is connected to the front end of the handle body 8, the tool 6 can enter the inner cavity of the support sleeve 2 through the tool support channel to connect to the handle body 8.

[0051] The adjusting sleeve 3 is fitted onto the outer wall of the support sleeve 2 and can be operably rotated around the axis of the support sleeve 2. In other words, the adjusting sleeve 3 and the support sleeve 2 are axially fixed, and the adjusting sleeve 3 cannot move along the axis of the support sleeve 2. After the tool 6 is inserted into the drill handle, the axial position of the tool 6 relative to the support sleeve 2 and the adjusting sleeve 2 is also relatively fixed. A transmission structure is provided between the support tube 1 and the adjusting sleeve 3. This transmission structure can drive the support tube 1 to move axially when the adjusting sleeve 3 is rotated, causing a corresponding change in the length of the front end of the support tube 1 protruding from the support sleeve 2. This, in turn, changes the length of the support tube 1 covering the tool 6, i.e., changes the length of the tool 6 extending out of the support tube 1.

[0052] In this embodiment, the support tube 1 is fitted inside the support sleeve 2, and the support tube 1 extends out of the front end of the support sleeve 2 and can move axially relative to the support sleeve 2. The adjusting sleeve 3 is fitted onto the outer wall of the support sleeve 2 and can be operably rotated around the axis of the support sleeve 2. A transmission structure is provided between the support tube 1 and the adjusting sleeve 3. The rotational motion of the adjusting sleeve 3 is converted into the axial motion of the support tube 1 through the transmission structure, so that the length of the front end of the support tube 1 protruding from the front end of the support sleeve 2 changes accordingly when the adjusting sleeve 3 rotates relative to the support sleeve 2. This changes the length of the front end of the support tube 1 covering the tool 6, thus making the length of the front end of the tool 6 protruding from the support tube 1 adjustable. The tool protrusion length is adjusted by rotating the adjusting sleeve 3. The entire process does not require replacement of support accessories or tools, making the operation simple. Furthermore, the entire process does not require tool insertion or removal, thereby reducing the adverse effects of frequent tool insertion and removal on the life of the drill handle and helping to extend the service life of the drill handle.

[0053] In one embodiment, the inner wall of the adjusting sleeve 3 is provided with a spiral groove 31, and the outer wall of the support tube 1 is provided with a first guide part 4 that penetrates the support sleeve 2 and is fitted into the spiral groove 31. The adjusting sleeve 3 is axially fixed relative to the support sleeve 2, and an axial guide structure is provided between the support sleeve 2 and the support tube 1. When the adjusting sleeve 3 rotates relative to the support sleeve 2, the first guide part 4 moves in the spiral groove 31 along the extension direction of the spiral groove 31, so as to drive the support tube 1 to move along the axial direction of the support sleeve 2.

[0054] When adjusting the length of the tool's protruding support attachment using the adjusting sleeve 3, the first guide part 4 penetrates the thickness direction of the support tube 1 and can extend into the spiral groove 31, moving within it. Since the adjusting sleeve 3 is axially fixed relative to the support sleeve 2, the adjusting sleeve 3 and the support sleeve 2 cannot move relative to each other axially. However, because an axial guide structure is provided between the support sleeve 2 and the support tube 1, rotating the adjusting sleeve 3 allows the first guide part 4 to move within the spiral groove 31 along its extension direction, thereby driving the support tube 1 to move axially along the support sleeve 2. Thus, by rotating the adjusting sleeve 3, the length of the support tube 1 protruding from the support sleeve 2 can be adjusted, thereby adjusting the exposed length of the tool 6, making it convenient to use.

[0055] The above-mentioned axial guide structure can be implemented in several ways, which will be listed and explained below:

[0056] In one implementation, see reference Figures 1 to 5 The first guide part 4 constitutes part of the axial guiding structure. The axial guiding structure also includes a guide groove 21 formed on the support sleeve 2. The guide groove 21 extends axially along the support sleeve 2. The first guide part 4 is fitted within the guide groove 21 and can move along the extension direction of the guide groove 21. In this configuration, the first guide part 4 can pass through the guide groove 21 and extend into the spiral groove 31 of the adjusting sleeve 3, moving within the guide groove 21 along its extension direction. The guide groove 21 guides the first guide part 4, allowing it to move only along the extension direction of the guide groove 21 (the axial direction of the support sleeve 2). In this configuration, the first guide part 4 not only fits within the spiral groove 31 but also cooperates with the guide groove 21 to achieve axial guidance for the adjusting sleeve 3 and the support tube 1. Both guiding structures share the same first guide part 4, resulting in a compact internal structure for the entire support accessory, which helps reduce manufacturing costs.

[0057] In another embodiment (not shown in the figure), the axial guide structure includes a guide groove and a second guide portion. The guide groove extends along the axial direction of the support sleeve 2, and the second guide portion is disposed in the guide groove.

[0058] Wherein, the guide groove is provided on the support sleeve 2, and the second guide part is provided on the support tube 1; or; the guide groove is provided on the support tube 1, the guide groove extends along the axial direction of the support tube 1, and the second guide part is provided on the support sleeve 2.

[0059] The second guide portion can be a structure protruding from the outer wall of the support tube 1 or the outer wall of the support sleeve 2, for example, it can be a protrusion, a boss, a column, or the like. In this embodiment, Figure 5 The guide groove 21 can be replaced by any hollow structure, as long as the first guide part 4 can pass through it. This type of guide groove can be formed on the support tube 1 or the support sleeve 2. Figure 5 The central guide groove 21 is located at any position that is circumferentially offset.

[0060] In this embodiment, the second guide part and the guide groove 21 cooperate to guide and limit the support tube 1, so that the support tube 1 can only move along the axial direction of the support sleeve 2.

[0061] In one implementation, see reference Figures 1 to 4 The first guide part 4 includes a ball bearing. The support tube 1 is provided with a receiving space 11 for accommodating the ball bearing. The ball bearing is rotatably disposed in the receiving space 11, and the ball bearing portion is embedded in the spiral groove 31.

[0062] The ball bearing can roll freely 360 degrees. The bottom of the ball bearing is positioned within the receiving space 11, and the top of the ball bearing can be embedded in the spiral groove 31. When the adjusting sleeve 3 is rotated, the ball bearing rolls along the extending direction of the spiral groove 31. Simultaneously, the ball bearing is confined within the receiving space 11 and cannot detach from it. Therefore, as the ball bearing moves within the spiral groove 31, it drives the support tube 1 to move through the receiving space 11, thereby allowing for adjustable length of the support tube 1 extending beyond the support sleeve 2. By incorporating the ball bearing, the feel and smoothness of rotating the adjusting sleeve 3 are improved, helping to prevent jamming.

[0063] In one implementation, see reference Figure 1 , Figure 4 The first guide portion 4 also includes a protrusion 12 protruding from the outer wall of the support tube 1, and the receiving space 11 is a receiving hole, which is opened on the surface of the protrusion 12 facing the adjustment sleeve 3.

[0064] The protrusion 12 can be a boss, a column, an annular protrusion, or other protruding structure provided on the outer wall of the support tube 1. The receiving space 11 can be a through hole or a blind hole. When the receiving hole is a through hole, a sealing member is provided inside the support tube 1 to prevent the balls from rolling into the interior of the support tube 1.

[0065] In this method, by providing the protrusion 12, even smaller diameter balls can extend into the spiral groove 31. This allows for a reduction in the width and depth of the spiral groove 31. For adjusting sleeves 3 with the same wall thickness, the smaller the width and depth of the spiral groove 31, the higher the overall strength. Therefore, this method of providing the protrusion 12 is beneficial for improving the overall strength of the adjusting sleeve 3.

[0066] Optionally, the receiving hole is a round hole with a diameter smaller than that of the ball. In this way, the edge or inner wall of the receiving hole can abut against the ball, keeping the ball partially embedded in the spiral groove 31, which is beneficial to the stable function of supporting the adjustment tool 6 of the accessory 7 to maintain its exposed length.

[0067] Optionally, along the radial direction of the support tube 1, any part of the ball extends beyond the outer wall of the support tube 1. This allows the ball to have a smaller size, which in turn helps to improve the overall strength of the adjusting sleeve 3.

[0068] It is worth mentioning that, regardless of whether the first guide portion 4 is constructed as part of the axial guide structure, the implementation of the first guide portion 4 is not limited to the methods listed above. In another embodiment (not shown in the figure), the first guide portion 4 includes a guide protrusion provided on the outer wall of the support tube 1. In this way, the guide protrusion extends directly into the spiral groove 31, and can also adjust the overall length of the support attachment by adjusting the adjusting sleeve 3 under the combined action of the axial guide structure, thereby achieving the purpose of adjusting the exposed length of the tool.

[0069] In one implementation, see Figure 1 A retaining ring 5 is fitted onto the outer wall of the support sleeve 2 and is axially fixed relative to the support sleeve 2. A first axial limiting surface 22 is provided on the outer wall of the support sleeve 2. The retaining ring 5 blocks one end of the adjusting sleeve 3 axially, and the first axial limiting surface 22 blocks the other end of the adjusting sleeve 3 axially. In this way, the adjusting sleeve 3 can be axially fixed relative to the support sleeve 2.

[0070] Optional, see also Figure 1 , Figure 2 The retaining ring 5 is detachably connected to the front end of the support sleeve 2 and blocks the front end face of the adjusting sleeve 3. The front end of the spiral groove 31 communicates with the front end face of the adjusting sleeve 3, and the first guide part 4 includes a ball partially embedded in the spiral groove 31. With this structure, the ball can be directly installed into the spiral groove from the front end of the adjusting sleeve 3 after the retaining ring 5 is removed, which is convenient for installation.

[0071] Figure 1 In this embodiment, the rear end face of the retaining ring 5 abuts against the front end face of the adjusting sleeve 3 along the axial direction, and the first axial limiting surface 22 abuts against the rear end face of the adjusting sleeve 3 along the axial direction to limit the adjusting sleeve 3 along the axial direction, thereby fixing the adjusting sleeve 3 axially relative to the supporting sleeve 2. The first axial limiting surface 22 is a vertical surface perpendicular to the axial direction of the supporting sleeve 2. Specifically, the first axial limiting surface 22 can be a stepped surface facing forward along the axial direction on the outer wall of the supporting sleeve 2.

[0072] Optionally, the support accessory has multiple length adjustment positions, and the support accessory is equipped with a position sensing structure.

[0073] In one possible implementation of this gear position sensing structure, an elastic element (not shown in the figure) is provided within the receiving hole. See [reference needed]. Figure 9 One end of the ball 4 abuts against the elastic element, and the other end abuts against the spiral groove 31; the spiral groove 31 is provided with at least two stop grooves 32 that communicate with the spiral groove 31 along its own extension direction, so that the operator can feel the stop when the ball falls into the stop groove 32. Optionally, the stop groove 32 can be an arc groove.

[0074] The support attachment 7 with a gear position sensing structure makes it easier for the operator to adjust the support attachment 7 to the target length, thereby achieving the effect of quickly adjusting the extension length of the cutter 6.

[0075] This embodiment also provides a drill handle, which is compatible with the tool 6. The drill handle includes:

[0076] The handle body 8 is used for transmission connection with the tool 6 and to provide rotational power to the tool 6;

[0077] Support accessory 7 is used to connect to the front end of the handle body 8 to adjust the exposed length of the cutter 6. The support accessory 7 is the support accessory 7 described in the above embodiment.

[0078] The rear end of the cutting tool 6 is inserted into the support attachment 7 and the handle body 8 in sequence, and is connected to the handle body 8 by transmission. The handle body 8 can drive the cutting tool 6 to rotate along its own axis.

[0079] This embodiment also provides a grinding device, which includes a cutting tool 6 and a grinding handle as described in the above embodiments. The handle body 8 is connected to the cutting tool 6 and provides rotational power to the cutting tool 6. The cutting tool 6 passes through a support attachment 7 so that the support attachment 7 supports the cutting tool 6.

[0080] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A support accessory for a drill handle, characterized in that, include: Support sleeve, used to connect to the front end of the handle body of the drill handle; A support tube is fitted inside the support sleeve. The support tube extends out of the front end of the support sleeve and can move axially relative to the support sleeve. A tool support channel is provided axially inside the support tube. An adjusting sleeve, fitted over the outer wall of the support sleeve and operably rotatable about the axis of the support sleeve, the adjusting sleeve being axially fixed relative to the support sleeve; and A transmission structure is provided between the support tube and the adjusting sleeve. The transmission structure is used to convert the rotational motion of the adjusting sleeve into the axial motion of the support tube, so that the length of the front end of the support tube protruding from the support sleeve changes accordingly when the adjusting sleeve rotates relative to the support sleeve.

2. The support accessory for a drill handle according to claim 1, characterized in that, The inner wall of the adjusting sleeve is provided with a spiral groove, and the outer wall of the support tube is provided with a first guide part that penetrates the support sleeve and is fitted into the spiral groove. An axial guide structure is provided between the support sleeve and the support tube. When the adjusting sleeve rotates relative to the support sleeve, the first guide part moves in the spiral groove along the extension direction of the spiral groove, so as to drive the support tube to move along the axial direction of the support sleeve.

3. The support accessory for a drill handle according to claim 2, characterized in that, The first guide portion constitutes part of the axial guide structure, which further includes a guide groove formed on the support sleeve. The guide groove extends along the axial direction of the support sleeve, and the first guide portion is fitted into the guide groove and can move along the extension direction of the guide groove.

4. The support accessory for a drill handle according to claim 2, characterized in that, The axial guide structure includes a guide groove and a second guide portion, wherein the second guide portion is disposed within the guide groove. Wherein, the guide groove is provided on the support sleeve and extends along the axial direction of the support sleeve, and the second guide portion is provided on the support tube; or, the guide groove is provided on the support tube and extends along the axial direction of the support tube, and the second guide portion is provided on the support sleeve.

5. The support accessory for a drill handle according to claim 2, characterized in that, The first guide portion includes a ball bearing, and the support tube is provided with a receiving space for accommodating the ball bearing. The ball bearing is rotatably disposed within the receiving space, and a portion of the ball bearing is embedded in the spiral groove.

6. The support accessory for a drill handle according to claim 5, characterized in that, The first guide portion also includes a protrusion protruding from the outer wall of the support tube, and the receiving space is a receiving hole, which is opened on the surface of the protrusion facing the adjusting sleeve.

7. The support accessory for a drill handle according to claim 6, characterized in that, The receiving hole is a through hole, and the support tube is provided with a sealing component to prevent the ball from rolling into the interior of the support tube; or, the receiving hole is a blind hole.

8. The support accessory for a drill handle according to claim 6, characterized in that, Along the radial direction of the support tube, any part of the ball extends beyond the outer wall of the support tube; and / or, the receiving hole is a circular hole, and the diameter of the receiving hole is smaller than the diameter of the ball.

9. The support accessory for the drill handle according to claim 6, characterized in that, An elastic element is provided in the receiving hole, one end of the ball abuts against the elastic element, and the other end abuts against the spiral groove; wherein, the spiral groove is provided with at least two gear slots communicating with the spiral groove along its own extension direction, so that the operator can feel the gear when the ball falls into the gear slot.

10. The support accessory for a drill handle according to claim 2, characterized in that, The first guide portion includes a guide protrusion disposed on the outer wall of the support tube.

11. The support accessory for a drill handle according to claim 2, characterized in that, A retaining ring is fitted on the outer wall of the support sleeve. The retaining ring is axially fixed relative to the support sleeve. A first axial limiting surface is provided on the outer wall of the support sleeve. The retaining ring blocks one end of the adjusting sleeve along the axial direction, and the first axial limiting surface blocks the other end of the adjusting sleeve along the axial direction.

12. The support accessory for a grinding drill handle according to claim 11, characterized in that, The retaining ring is detachably connected to the front end of the support sleeve and blocks the front end face of the adjusting sleeve. The front end of the spiral groove communicates with the front end face of the adjusting sleeve. The first guide portion includes a ball partially embedded in the spiral groove.

13. The support accessory for a grinding drill handle according to claim 1 or 2, characterized in that, The support accessory has multiple length adjustment positions, and the support accessory is equipped with a position sensing structure.

14. A drill handle, adapted to a cutting tool, characterized in that, The drill handle includes: The handle body is used to connect with the tool drive and provide rotational power to the tool; A support accessory is provided for connection to the front end of the handle body to adjust the exposed length of the cutter, wherein the support accessory is the support accessory as described in any one of claims 1-13.

15. A grinding and drilling device, characterized in that, The grinding device includes a cutting tool and a grinding handle as described in claim 14, the handle body being kinetically connected to the cutting tool and providing rotational power to the cutting tool, the cutting tool passing through the support attachment so that the support attachment supports the cutting tool.

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