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

Abstract

The invention relates to the technical field of medical instruments, in particular to a supporting accessory for an abrasive drill handle, the abrasive drill handle and an abrasive drill device.The supporting accessory 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] The present invention relates to the technical field of medical instruments, and in particular to a supporting accessory for a drill handle, a drill handle and a drill device. Background Art

[0002] After the medical drill handle is connected to the tool, it can drive the tool to rotate to cut tissue. The medical drill handle is provided with a channel for inserting the tool, and the tool is connected to the medical drill handle by inserting the channel. In order to adjust the exposed length of the tool to adapt to different surgical scenarios, two methods are currently used:

[0003] One method is to solve the above problem by replacing the tool or support tube of a specific length. This method has cumbersome steps, complicated operations, low efficiency, and requires a large number of tools or support tubes, resulting in high costs.

[0004] Another method is to set multiple slots at different axial positions on the tool, and apply axial force to the tool so that the locking parts of the medical drill handle are inserted into different slots to adjust the tool length. This method can adjust the exposed length without replacing the tool. However, the tool needs to be pulled out and inserted each time the tool length is adjusted. Frequent pulling out and inserting of the tool will affect the life of the locking structure of the drill handle. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a support accessory for a drill handle, a drill handle and a drill grinding device, which are used to solve the problem of complicated tool replacement operation steps in the prior art and reduce the adverse effects of tool length adjustment on the life of the drill handle.

[0006] To achieve the above-mentioned and other related purposes, the present invention provides a support attachment for a drill handle, comprising:

[0007] A support sleeve, used for connecting to the front end of the handle body of the drill handle;

[0008] A support tube, which is sleeved 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, and a tool support channel is axially arranged inside the support tube;

[0009] an adjusting sleeve, which is arranged on the outer wall of the supporting sleeve and can be operably rotated around the axis of the supporting sleeve, and the adjusting sleeve is axially fixed relative to the supporting sleeve; and

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

[0011] Optionally, a spiral groove is provided on the inner wall of the adjustment sleeve, and a first guide portion is provided on the outer wall of the support tube, which 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 adjustment sleeve rotates relative to the support sleeve, the first guide portion moves in the spiral groove along the extension direction of the spiral groove to drive the support tube to move axially along the support sleeve.

[0012] Optionally, the first guide portion constructs a partial structure of the axial guide structure, and the axial guide structure also includes a guide groove opened on the support sleeve, and the guide groove extends along the axial direction of the support sleeve. The first guide portion is cooperatedly arranged in the guide groove and can move along the extension direction of the guide groove.

[0013] Optionally, the axial guide structure comprises a guide groove and a second guide portion, and the second guide portion is arranged in the guide groove in cooperation;

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

[0015] Optionally, the first guide portion includes a ball, and a receiving space for receiving the ball is provided on the outer wall of the support tube. The ball is rollably arranged in the receiving space, and the ball is partially embedded in the spiral groove.

[0016] Optionally, the first guide portion further comprises a protruding portion protruding from the outer wall of the support tube, the accommodating space is an accommodating hole, and the accommodating hole is provided on a surface of the protruding portion facing the adjustment sleeve.

[0017] Optionally, the accommodating hole is a through hole, and a blocking member for preventing the ball from rolling into the interior of the support tube is provided in the support tube; or, the accommodating hole is a blind hole.

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

[0019] Optionally, an elastic member is provided in the accommodating hole, one end of the ball abuts against the elastic member, and the other end abuts against the spiral groove; wherein the spiral groove is provided with at least two gear grooves connected to the spiral groove at intervals along its own extension direction, so that the operator can feel the gear position when the steel ball falls into the gear groove.

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

[0021] Optionally, a retaining ring is disposed 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 adjustment sleeve along the axial direction, and the first axial limiting surface blocks the other end of the adjustment sleeve along the axial direction.

[0022] Optionally, the retaining ring is detachably connected to the front end of the supporting sleeve and is retained at the front end surface of the adjusting sleeve, the front end of the spiral groove is connected to the front end surface of the adjusting sleeve, and the first guide portion includes a ball partially embedded in the spiral groove.

[0023] Optionally, the supporting accessory has a plurality of length adjustment gears, and the supporting accessory is provided with a gear sensing structure.

[0024] The present invention also provides a drill grinding handle, which is compatible with a tool, and the drill grinding handle comprises:

[0025] The handle body is used for transmission connection with the tool and providing rotational power to the tool;

[0026] A support accessory is used to be connected to the front end of the handle body to adjust the exposed length of the knife, wherein the support accessory is the above-mentioned support accessory.

[0027] The present invention also provides a drill grinding device, which includes a tool and the drill grinding handle as described above, wherein the handle body is transmission-connected to the tool and provides rotational power to the tool, and the tool passes through the supporting attachment so that the supporting attachment supports the tool.

[0028] As described above, in the support accessory for the drill handle of the present invention, the support tube is sleeved in the support sleeve, and the support tube extends out of the front end of the support sleeve and can move axially relative to the support sleeve. The adjustment sleeve is sleeved on the outer wall of the support sleeve and can be operably rotated around the axis of the support sleeve, and a transmission structure is provided between the support tube and the adjustment sleeve. The rotational movement of the adjustment sleeve is converted into the axial movement of the support tube by the transmission structure, so that when the adjustment sleeve rotates relative to the support sleeve, the length of the front end of the support tube exposed to the front end of the support sleeve changes accordingly, thereby making the length of the front end of the support tube covering the tool change accordingly, and realizing that the length of the front end of the tool exposed to the support tube is adjustable. The exposed length of the tool is adjusted by rotating the adjustment sleeve, and the whole process does not require the replacement of the support accessory or the tool, and the operation is simple. In addition, the whole process does not require the tool to be pulled out and inserted, thereby reducing the adverse effects of frequent tool pulling out and inserting on the life of the drill handle, which is beneficial to extending the service life of the drill handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of the structure of the adjustment sleeve according to an embodiment of the present invention;

[0031] Figure 3 This is a schematic diagram of the support tube structure of an embodiment of the present invention;

[0032] Figure 4 A three-dimensional diagram of a support tube according to an embodiment of the present invention;

[0033] Figure 5 A three-dimensional diagram of a support sleeve according to an embodiment of the present invention;

[0034] Figure 6 An exploded view of a drill grinding device according to an embodiment of the present invention;

[0035] Figure 7 It is a schematic diagram of a state in which the support tube of the drill grinding device according to an embodiment of the present invention is extended to the longest limit position;

[0036] Figure 8 It is a schematic diagram of a state in which the support tube of the drill grinding device according to an embodiment of the present invention is retracted to the shortest limit position;

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

[0038] Part Number Description

[0039] 1-support tube; 11-accommodating space; 12-protruding portion; 2-support sleeve; 21-guide groove; 22-first axial limiting surface; 3-adjusting sleeve; 31-spiral groove; 32-shift groove; 4-first guide portion; 5-retaining ring; 6-tool; 7-support attachment; 8-handle body. DETAILED DESCRIPTION

[0040] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0041] It should be noted that the diagram provided in the present embodiment only illustrates the basic concept of the present invention in a schematic manner, so the diagram only shows the components related to the present invention rather than drawing according to the number, shape and size of the components during actual implementation. The type, quantity and ratio of each component during actual implementation can be a random change, and the component layout type may also be more complicated. The structure, ratio, size, etc. illustrated in the drawings of the present specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed by the present invention without affecting the effect that the present invention can produce and the purpose that can be achieved. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of narration, and are not used to limit the scope of the present invention. The change or adjustment of its relative relationship should also be regarded as the scope of the present invention without substantially changing the technical content.

[0042] In the description of the following embodiments, the "axial direction" refers to the axial direction of the handle body 8, which is also the axial direction of the entire drill grinder handle; in the description of the following embodiments, the directional words "front" and "rear" are relative directions, "front" refers to the direction of the drill grinder bit axially close to the tool 6, and "rear" refers to the direction of the drill grinder bit axially away from the tool 6.

[0043] It should be noted that the supporting attachment 7 in the following embodiment is a component of the drill handle, see Figures 6 to 8 The drill handle generally 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 the existing handle body or a new structure. The structure of the handle body 8 does not belong to the invention point of this case and will not be elaborated in detail here. The support attachment 7 of the following embodiments is connected to the front end of the handle body 8. Figure 6-Figure 8In the corresponding embodiment, the support accessory 7 is detachably connected to the front end of the handle body 8. In the actual implementation process, the support accessory 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 accessory 7 can adopt the existing structure or a new structure. It does not belong to the invention point of this case and will not be elaborated here.

[0044] See also Figure 1 This embodiment provides a support attachment 7 for a drill handle, comprising:

[0045] A support sleeve 2, used to be connected to the front end of a handle body 8 of a drill handle;

[0046] A support tube 1 is sleeved in a support sleeve 2. 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. A tool support channel is axially arranged in the support tube 1.

[0047] an adjusting sleeve 3, which is arranged on the outer wall of the supporting sleeve 2 and can be operably rotated around the axis of the supporting sleeve 2, and the adjusting sleeve 3 is axially fixed relative to the supporting sleeve 2; and

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

[0049] The support sleeve 2 has an inner cavity that penetrates along its axial direction, so that the support tube 1 penetrates into the inner cavity of the support sleeve 2, and the front end of the support tube 1 can 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, the support sleeve 2 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 extending axially therethrough, and the tool support channel is connected to the inner cavity of the support sleeve 2, so that when the support attachment 7 is connected to the front end of the handle body 8, the tool 6 can pass through the tool support channel into the inner cavity of the support sleeve 2 to connect to the handle body 8.

[0051] The adjustment sleeve 3 is sleeved on the outer wall of the support sleeve 2 and can be operated to rotate around the axis of the support sleeve 2, that is, the adjustment sleeve 3 and the support sleeve 2 are relatively fixed in the axial direction, and the adjustment sleeve 3 cannot move in the axial direction of the support sleeve 3. After the tool 6 is installed in the drill handle, the axial position of the tool 6 is relatively fixed compared with the support sleeve 2 and the adjustment sleeve 2. A transmission structure is provided between the support tube 1 and the adjustment sleeve 3. The transmission structure can drive the support tube 1 to move in the axial direction when the adjustment sleeve 3 is rotated, so that the length of the front end of the support tube 1 exposed from the support sleeve 2 changes accordingly, so that the length of the support tube 1 covering the tool 6 changes accordingly, that is, the length of the tool 6 extending out of the support tube 1 changes accordingly.

[0052] In this embodiment, the support tube 1 is sleeved 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 adjustment sleeve 3 is sleeved on the outer wall of the support sleeve 2 and can be operably rotated around the axis of the support sleeve 2, and a transmission structure is provided between the support tube 1 and the adjustment sleeve 3. The rotational movement of the adjustment sleeve 3 is converted into the axial movement of the support tube 1 through the transmission structure, so that when the adjustment sleeve 3 rotates relative to the support sleeve 2, the length of the front end of the support tube 1 exposed from the front end of the support sleeve 2 changes accordingly, thereby changing the length of the front end of the support tube 1 covering the tool 6, and realizing that the length of the front end of the tool 6 exposed from the support tube 1 is adjustable. The exposed length of the tool is adjusted by rotating the adjustment sleeve 3, and the whole process does not require the replacement of the support accessories or the tool, and the operation is simple. In addition, the whole process does not require the tool to be pulled out and inserted, thereby reducing the adverse effects of frequent pulling out and inserting of the tool 6 on the life of the drill grinding handle, which is conducive to extending the service life of the drill grinding handle.

[0053] In one embodiment, a spiral groove 31 is provided on the inner wall of the adjustment sleeve 3, and a first guide portion 4 is provided on the outer wall of the support tube 1, which penetrates the support sleeve 2 and is fitted into the spiral groove 31. The adjustment 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 adjustment sleeve 3 rotates relative to the support sleeve 2, the first guide portion 4 moves in the spiral groove 31 along the extension direction of the spiral groove 31 to drive the support tube 1 to move axially along the support sleeve 2.

[0054] When the adjustment sleeve 3 is used to adjust the length of the tool extending out of the support attachment, the first guide portion 4 penetrates the thickness direction of the support tube 1 and can extend into the spiral groove 31 and move in the spiral groove 31. Since the adjustment sleeve 3 is axially fixed relative to the support sleeve 2, the adjustment sleeve 3 and the support sleeve 2 cannot move relative to each other in the axial direction. Since an axial guide structure is provided between the support sleeve 2 and the support tube 1, the first guide portion 4 can be moved in the spiral groove 31 along the extension direction of the spiral groove 31 by rotating the adjustment sleeve 3, and can drive the support tube 1 to move axially along the support sleeve 2. In this way, the length of the support tube 1 extending out of the support sleeve 2 can be adjusted by rotating the adjustment sleeve 3, thereby adjusting the exposed length of the tool 6, which is convenient to use.

[0055] There are many possible implementations of the above axial guide structure, which are listed below:

[0056] In one embodiment, in conjunction with Figures 1 to 5 , the first guide portion 4 constitutes a partial structure of the axial guide structure, and the axial guide structure also includes a guide groove 21 provided on the support sleeve 2, the guide groove 21 extends along the axial direction of the support sleeve 2, and the first guide portion 4 is arranged in the guide groove 21 and can move along the extension direction of the guide groove 21. In this way, the first guide portion 4 can pass through the guide groove 21 and extend into the spiral groove 31 of the adjustment sleeve 3, and move in the guide groove 21 along the extension direction of the guide groove 21. The guide groove 21 can guide the first guide portion 4, so that the first guide portion 4 can only move along the extension direction of the guide groove 21 (the axial direction of the support sleeve 2). At this time, the first guide portion 4 can not only be arranged in the spiral groove 31, but also can cooperate with the guide groove 21 to realize the axial guiding effect of the adjustment sleeve 3 and the support tube 1. The two guide structures share the same first guide portion 4 structure, and the internal structure of the entire support accessory is compact, which is conducive to reducing the manufacturing cost.

[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 cooperatively arranged in the guide groove;

[0058] The guide groove is provided on the support sleeve 2 , and the second guide portion 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 portion is provided on the support sleeve 2 .

[0059] The second guide portion may be a structure protruding from the outer wall of the support tube 1 or the outer wall of the support sleeve 2, for example, a protrusion, a boss, a convex column, etc. In this embodiment, Figure 5 The guide groove 21 in the embodiment can be replaced by any hollow structure as long as the first guide portion 4 can pass through. The guide groove of this type can be provided on the support tube 1 or the support sleeve 2. Figure 5 The middle guide groove 21 is at any position staggered in the circumferential direction.

[0060] In this embodiment, the support tube 1 is guided and limited by the cooperation between the second guide portion and the guide groove 21 , and the support tube 1 can also be moved only along the axial direction of the support sleeve 2 .

[0061] In one embodiment, in conjunction with Figures 1 to 4 The first guide portion 4 includes a ball, and a receiving space 11 for receiving the ball is provided on the support tube 1. The ball is rollably arranged in the receiving space 11, and a portion of the ball is embedded in the spiral groove 31.

[0062] The ball can roll freely 360 degrees, the bottom of the ball is set in the accommodating space 11, and the top of the ball can be embedded in the spiral groove 31. When the adjustment sleeve 3 is rotated, the ball rolls along the extension direction of the spiral groove 31. At the same time, the ball is confined in the accommodating space 11 and cannot escape from the accommodating space 11. Therefore, when the ball moves in the spiral groove 31, the support tube 1 is driven to move through the accommodating space 11, so that the length of the support tube 1 extending out of the support sleeve 2 can be adjusted. By setting the ball, the feel and smoothness when rotating the adjustment sleeve 3 can be improved, which is conducive to avoiding jamming.

[0063] In one embodiment, in conjunction with Figure 1 , Figure 4 The first guide portion 4 further includes a protruding portion 12 protruding from the outer wall of the support tube 1 , and the accommodating space 11 is an accommodating hole, which is opened on the surface of the protruding portion 12 facing the adjustment sleeve 3 .

[0064] The protrusion 12 may be a boss, a protrusion, an annular protrusion or other protrusion structure arranged on the outer wall of the support tube 1. The accommodation space 11 may be a through hole or a blind hole. When the accommodation hole is a through hole, a blocking member is arranged in the support tube 1 to prevent the ball from rolling into the support tube 1.

[0065] In this way, by providing the protrusion 12, a ball with a smaller diameter can also be inserted into the spiral groove 31, so that the width and depth of the spiral groove 31 can also be reduced. For the adjustment sleeve 3 with the same wall thickness, the smaller the width and depth of the spiral groove 31, the higher the overall strength. Therefore, this way of providing the protrusion 12 is conducive to improving the overall strength of the entire adjustment sleeve 3.

[0066] Optionally, the receiving hole is a circular hole, and the diameter of the receiving hole is smaller than the diameter of the ball. In this way, the edge or inner wall of the receiving hole can resist the ball, so that the ball remains partially embedded in the spiral groove 31, which is conducive to the stability of the function of supporting the accessory 7 to adjust the exposed length of the tool 6.

[0067] Optionally, along the radial direction of the support tube 1 , any part of the ball exceeds the outer wall of the support tube 1 , which is beneficial for the ball to have a smaller size, and is also beneficial for improving the overall strength of the adjustment sleeve 3 .

[0068] It is worth mentioning that, regardless of whether the first guide portion 4 is configured as part of the axial guide structure, the implementation method of the first guide portion 4 is not limited to the above-listed methods. In another embodiment (not shown in the figure), the first guide portion 4 includes a guide protrusion arranged on the outer wall of the support tube 1. In this way, the guide protrusion directly extends into the spiral groove 31, and the overall length of the support attachment can be adjusted by using the adjustment sleeve 3 under the joint action of the axial guide structure, so as to achieve the purpose of adjusting the exposed length of the tool.

[0069] In one embodiment, see Figure 1 A retaining ring 5 is provided on 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 is axially blocked at one end of the adjustment sleeve 3, and the first axial limiting surface 22 is axially blocked at the other end of the adjustment sleeve 3. In this way, the axial fixation of the adjustment sleeve 3 relative to the support sleeve 2 can be achieved.

[0070] Optional, see Figure 1 , Figure 2 The retaining ring 5 is detachably connected to the front end of the support sleeve 2 and is retained at the front end surface of the adjustment sleeve 3. The front end of the spiral groove 31 is connected to the front end surface of the adjustment sleeve 3. The first guide portion 4 includes a ball that is partially embedded in the spiral groove 31. With this structure, after removing the retaining ring 5, the ball can be directly installed into the spiral groove from the front end of the adjustment sleeve 3, which is convenient for installation.

[0071] Figure 1 In the embodiment of the present invention, the rear end face of the retaining ring 5 in the axial direction abuts against the front end face of the adjusting sleeve 3 in the axial direction, and the first axial limiting face 22 abuts against the rear end face of the adjusting sleeve 3 in the axial direction, so as to limit the adjusting sleeve 3 in the axial direction, so that the adjusting sleeve 3 is axially fixed relative to the supporting sleeve 2. The first axial limiting face 22 is a vertical face perpendicular to the axial direction of the supporting sleeve 2, and specifically, the first axial limiting face 22 can be a step face on the outer wall of the supporting sleeve 2 facing forward in the axial direction.

[0072] Optionally, the supporting accessory has a plurality of length adjustment positions, and the supporting accessory is provided with a position sensing structure.

[0073] For the gear position sensing structure, in one possible implementation, an elastic member (not shown in the figure) is provided in the receiving hole, see Fig. 9 One end of the ball 4 abuts against the elastic member, and the other end abuts against the spiral groove 31; the spiral groove 31 is provided with at least two gear grooves 32 connected to the spiral groove 31 at intervals along its own extension direction, so that the operator can feel the gear position when the steel ball falls into the gear groove 32. Optionally, the gear groove 32 can be an arc groove.

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

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

[0076] A handle body 8 is used for transmission connection with the cutter 6 and providing rotational power to the cutter 6;

[0077] The supporting accessory 7 is used to be connected to the front end of the handle body 8 to adjust the exposed length of the knife 6, wherein the supporting accessory 7 is the supporting accessory 7 described in the above embodiment.

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

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

[0080] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. A support accessory for a drill handle, characterized in that: include: A support sleeve, used for connecting to the front end of the handle body of the drill handle; A support tube, which is sleeved 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, and a tool support channel is axially arranged inside the support tube; an adjusting sleeve, which is arranged on the outer wall of the supporting sleeve and can be operably rotated around the axis of the supporting sleeve, and the adjusting sleeve is axially fixed relative to the supporting sleeve; and A transmission structure is provided between the support tube and the adjustment sleeve, and is used for converting the rotational motion of the adjustment sleeve into the axial motion of the support tube, so that when the adjustment sleeve rotates relative to the support sleeve, the length of the front end of the support tube exposed from the support sleeve changes accordingly.

2. The support attachment for a drill handle according to claim 1, characterized in that: A spiral groove is provided on the inner wall of the adjustment sleeve, and a first guide portion is provided on the outer wall of the support tube, which 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 adjustment sleeve rotates relative to the support sleeve, the first guide portion moves in the spiral groove along the extension direction of the spiral groove to drive the support tube to move axially along the support sleeve.

3. The support attachment for a drill handle according to claim 2, characterized in that: The first guide portion constitutes a partial structure of the axial guide structure, and the axial guide structure also includes a guide groove opened on the support sleeve, and the guide groove extends along the axial direction of the support sleeve. The first guide portion is cooperatedly arranged in the guide groove and can move along the extension direction of the guide groove.

4. The support attachment for a drill handle according to claim 2, characterized in that: The axial guide structure comprises a guide groove and a second guide portion, wherein the second guide portion is cooperatively arranged in the guide groove; Wherein, the guide groove is arranged on the support sleeve, the guide groove extends along the axial direction of the support sleeve, and the second guide portion is arranged on the support tube; or, the guide groove is arranged on the support tube, the guide groove extends along the axial direction of the support tube, and the second guide portion is arranged on the support sleeve.

5. The supporting attachment for a drill handle according to claim 2, characterized in that: The first guide portion includes a ball, and a receiving space for receiving the ball is provided on the support tube. The ball is rollably arranged in the receiving space, and a portion of the ball is embedded in the spiral groove.

6. The supporting attachment for a drill handle according to claim 5, characterized in that: The first guide portion further comprises a protruding portion protruding from the outer wall of the support tube, the accommodating space is an accommodating hole, and the accommodating hole is arranged on the surface of the protruding portion facing the adjusting sleeve.

7. The support attachment for a drill handle according to claim 6, characterized in that: The accommodating hole is a through hole, and a blocking member for preventing the ball from rolling into the interior of the support tube is provided in the support tube; or, the accommodating hole is a blind hole.

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

9. The supporting attachment for the drill handle according to claim 6, characterized in that: An elastic member is provided in the accommodating hole, one end of the ball abuts against the elastic member, and the other end abuts against the spiral groove; wherein, the spiral groove is provided with at least two gear grooves connected to the spiral groove at intervals along its own extension direction, so that the operator can feel the gear position when the steel ball falls into the gear groove.

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

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

12. The support attachment for a drill handle according to claim 11, characterized in that: The retaining ring is detachably connected to the front end of the supporting sleeve and is retained at the front end surface of the adjusting sleeve. The front end of the spiral groove is connected to the front end surface of the adjusting sleeve. The first guide portion includes a ball partially embedded in the spiral groove.

13. The supporting attachment for a drill handle according to claim 1 or 2, characterized in that: The supporting accessory has a plurality of length adjustment gears, and the supporting accessory is provided with a gear sensing structure.

14. A drill handle adapted for use with a tool, characterized in that: The drill handle comprises: The handle body is used for transmission connection with the tool and providing rotational power to the tool; A support accessory, used for connecting to the front end of the handle body to adjust the exposed length of the knife, wherein the support accessory is the support accessory described in claims 1-13.

15. A drill grinding device, characterized in that: The drill grinding device comprises a tool and a drill grinding handle as claimed in claim 14, wherein the handle body is in transmission connection with the tool and provides rotational power to the tool, and the tool passes through the supporting attachment so that the supporting attachment supports the tool.

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