Drill chuck

Abstract

The invention relates to a drill chuck. The drill chuck comprises a drill body, a clamping jaw retaining piece, a matched locking part, an elastic piece and a clamping jaw. The drill body is sleeved with the clamping jaw holding piece, the clamping jaw holding piece abuts against the clamping jaw, the matched locking part comprises a locking thread and a containing groove, and the matched locking part is fixed relative to the axial position of the drill body and rotates in the circumferential direction; the clamping jaw retaining piece can be in threaded connection with the matched locking part, and when the threads of the clamping jaw retaining piece and the matched locking part are separated, the clamping jaw retaining piece axially translates; a first positioning part is arranged on the clamping jaw retaining piece, and a second positioning part matched with the first positioning part is arranged on the drill body, so that the clamping jaw retaining piece is limited in the circumferential direction and can move in the axial direction relative to the drill body; the elastic piece provides driving force for driving the clamping jaw retaining piece to enable the clamping jaw to be closed, the matched locking part does not need to be continuously rotated to drive the clamping jaw to be opened or closed in the inserting and pulling-out process of the clamped object, the number of turns of rotation needed by the matched locking part in the clamping or loosening process is reduced, the stroke of the matched locking part is reduced, and the clamping effect is improved. And the clamping and loosening efficiency of the clamped object is improved, time and labor are saved, and the use convenience is high.

Description

Technical Field

[0001] The present disclosure relates to the technical field of drilling tools, and in particular to a drill chuck. Background Art

[0002] The drill chuck is one of the main accessories in the power tool industry and the machine tool industry. It is widely used in hand drills, drilling machines, etc. It is a tool that is matched with electric drills and is used to clamp working heads such as drill tools.

[0003] For example, Chinese patent application publication number CN203061937U discloses a drill chuck comprising a drill body, a nut, a rotating sleeve, and three jaws. The drill body has three jaw holes spaced around its central axis, with each jaw inserted into a corresponding jaw hole. The nut is threadedly mounted on the drill body, and the nut is threadedly connected to the jaws. The rotating sleeve surrounds the nut. Rotation of the rotating sleeve drives the nut, which in turn drives the jaws to move along the jaw holes to open or close, thereby tightening and loosening the drill tool or other clamped object.

[0004] However, the existing drill chuck requires continuous rotation of the rotary sleeve to drive the clamping jaws to open or close in order to insert and clamp or loosen and pull out the clamped object. That is, in the process of clamping or loosening the clamped object, the rotary sleeve needs to rotate many circles, resulting in a large stroke of the rotary sleeve, low efficiency in clamping and loosening the clamped object, time-consuming and labor-intensive, and inconvenient to use. Summary of the Invention

[0005] In order to solve the above technical problem or at least partially solve the above technical problem, the present disclosure provides a drill chuck.

[0006] The present disclosure provides a drill chuck, comprising a drill body, a jaw holder, a mating locking portion, an elastic member, and a jaw located in a jaw hole of the drill body;

[0007] The jaw holder is sleeved on the drill body and abuts against the jaw, the mating locking portion includes a locking thread and a receiving groove, the mating locking portion is fixed in an axial position relative to the drill body and circumferentially rotates; the jaw holder can be threadedly connected to the mating locking portion, and when the jaw holder is threadedly disengaged from the mating locking portion, the jaw holder is axially translated; the receiving groove is parallel to the axis of the mating locking portion and passes through the locking thread;

[0008] The clamping jaw holder is provided with a first positioning portion, and the drill body is provided with a second positioning portion, the first positioning portion and the second positioning portion cooperate to limit the clamping jaw holder circumferentially relative to the drill body and enable axial movement;

[0009] The elastic member provides a driving force for driving the clamping jaw holding member to close the clamping jaws.

[0010] Optionally, the clamping jaw holder includes a collar and a connecting arm;

[0011] The collar is sleeved on the drill body and abuts against the clamping jaw. The connecting arm is arranged on one side of the collar and extends along the axial direction of the drill body. The connecting arm is provided with a thread and can be threadedly connected with the matching locking portion.

[0012] Optionally, the first positioning portion is a positioning protrusion, the connecting arm is formed as the positioning protrusion, the second positioning portion is a positioning groove for the positioning protrusion to extend into, and the positioning groove is provided on the outer wall of the drill body.

[0013] Optionally, the groove wall of the positioning groove on the side away from the axis of the drill body is open;

[0014] And / or, a positioning flange is provided on the outer wall of the drill body, and the positioning groove is provided on the positioning flange.

[0015] Optionally, the first positioning portion is a positioning protrusion provided on the inner wall of the collar, the positioning protrusion extends radially inwardly along the collar, the second positioning portion is a positioning groove into which the positioning protrusion can extend, and the clamping jaw hole is formed as the positioning groove.

[0016] Optionally, an external thread is provided on the outer wall of the connecting arm, an internal thread matching the external thread is provided on the inner wall of the matching locking portion, and an accommodating groove for accommodating the positioning protrusion is provided on the internal thread;

[0017] Alternatively, an internal thread is provided on the inner wall of the connecting arm, an external thread matching the internal thread is provided on the outer wall of the matching locking portion, and an accommodating groove for accommodating the positioning protrusion is provided on the external thread.

[0018] Optionally, an arc groove is provided on the rear end surface of the clamping jaw, the extension direction of the arc groove is perpendicular to the movement direction of the clamping jaw, a rolling body is movably arranged in the arc groove, and one side of the rolling body is exposed outside the arc groove and abuts against the drill body.

[0019] Optionally, a first guide portion is provided on the clamping jaw, and a second guide portion is provided on the hole wall of the clamping jaw hole, and the second guide portion cooperates with the first guide portion to guide the movement of the clamping jaw;

[0020] The first guide portion includes a guide protrusion provided on the outer wall of the clamping jaw, wherein an extending direction of the guide protrusion is parallel to a moving direction of the clamping jaw, and the second guide portion includes a guide groove into which the guide protrusion can extend.

[0021] Optionally, a guide section for guiding the clamped object is provided on one side of the clamping jaw facing the axis of the drill body, and the guide section is located at the front end of the clamping jaw and is formed as a guide arc surface.

[0022] Optionally, the mating locking portion is an independent component or the mating locking portion is provided on a drill chuck sleeve.

[0023] The technical solution provided by the embodiments of the present disclosure has the following advantages over the prior art:

[0024] The drill chuck provided by the present invention is provided with a drill body, a jaw holder, a matching locking portion, and an elastic member, and a jaw is provided in the jaw hole of the drill body; the jaw holder is sleeved on the drill body and abuts against the jaw, the matching locking portion includes a locking thread and a receiving groove, and the matching locking portion is fixed in an axial position relative to the drill body and rotates circumferentially; the jaw holder can be threadedly connected to the matching locking portion, and when the jaw holder is threadedly disengaged from the matching locking portion, the jaw holder translates axially. The jaw holder is provided with a first positioning portion, and the drill body is provided with a second positioning portion. The first positioning portion and the second positioning portion cooperate to limit the jaw holder to a circumferential position relative to the drill body and to allow axial movement. That is, during rotation of the mating locking portion, the jaw holder can move axially along the drill body under the action of the first and second positioning portions, but will not rotate circumferentially of the drill body. The elastic member provides a driving force for driving the jaw holder to close the jaws. When the object is inserted from the front end of the drill body, the jaws move radially outward along the drill body and expand. The jaws abut the jaw holder, causing the jaw holder to move toward the front end of the drill body. The jaw holder presses the elastic member toward the front or rear end of the drill body, causing the object to be coaxially inserted into the drill body and pre-tightened in the drill body. When the object is inserted into place, the mating locking portion is rotated to engage the mating locking portion with the jaw holder thread, thereby achieving clamping and locking of the object. When the clamp needs to be pulled out, the mating locking part only needs to be rotated in the opposite direction to release the threaded engagement between the mating locking part and the clamping jaw holder. The clamping jaw holder can move toward the rear end of the drill body under the elastic force of the elastic part, so that the clamping jaws move radially inward and close along the drill body, thereby making the clamped object easier to pull out. That is to say, the drill chuck provided by the present invention does not require continuous rotation of the mating locking part to drive the clamping jaws to open or close during the process of inserting and pulling out the clamping object. Compared with the prior art solution that requires continuous rotation of the rotating sleeve to drive the clamping jaws to open or close in order to insert, clamp, or loosen and pull out the clamping object, the number of turns that the mating locking part needs to rotate during the clamping or loosening process of the clamping object is reduced to a certain extent, thereby reducing the stroke of the mating locking part, improving the efficiency of clamping and loosening the clamping object, saving time and effort, and being more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0026] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 An exploded view of the drill chuck according to an embodiment of the present disclosure;

[0028] Figure 2 A top view of the drill chuck according to an embodiment of the present disclosure;

[0029] Figure 3 for Figure 2 Cross-sectional view along AA;

[0030] Figure 4 is an isometric view of a jaw holder of a drill chuck according to an embodiment of the present disclosure;

[0031] Figure 5 is an isometric view of a rear sleeve of a drill chuck according to an embodiment of the present disclosure;

[0032] Figure 6 is an isometric view of a drill body of a drill chuck according to an embodiment of the present disclosure;

[0033] Figure 7 is an isometric view of the jaws of the drill chuck according to an embodiment of the present disclosure;

[0034] Figure 8 This is an assembly diagram of a drill chuck according to another embodiment of the present disclosure;

[0035] Figure 9 This is an axonometric view of a jaw holder of a drill chuck according to another embodiment of the present disclosure;

[0036] Figure 10 This is an axonometric view of a drill body of a drill chuck according to another embodiment of the present disclosure;

[0037] Figure 11 This is a cross-sectional view of a drill body of a drill chuck according to another embodiment of the present disclosure.

[0038] Among them, 1. front sleeve; 2. rear sleeve; 21. avoidance groove; 22. stop arm; 23. accommodating groove; 3. drill body; 31. clamping jaw hole; 32. positioning flange; 33. stop member; 4. clamping jaw retaining member; 41. collar; 411. abutting ring segment; 42. connecting arm; 5. elastic member; 6. clamping jaw; 61. guide segment; 62. arc groove; 63. rolling element; 71. external thread; 72. internal thread; 81. first positioning portion; 82. second positioning portion; 91. first guide portion; 92. second guide portion; 101. first retaining spring; 102. second retaining spring. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features therein can be combined with each other in the absence of conflict.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0041] refer to Figures 1 to 11 As shown, this embodiment provides a drill chuck, comprising a drill body 3, a front sleeve 1 mounted on the front side of the drill body 3, a rear sleeve 2 mounted on the rear side of the drill body 3, a jaw holder 4, an elastic member 5, and a jaw 6 located within a jaw hole 31 of the drill body 3. The jaw holder 4 is mounted on the drill body 3 and abuts against the jaw 6. The jaw holder 4 is located between the drill body 3 and the rear sleeve 2 and can be threadedly connected to the rear sleeve 2. A first positioning portion 81 is provided on the jaw holder 4, and a second positioning portion 82 is provided on the drill body 3. The first positioning portion 81 and the second positioning portion 82 cooperate to circumferentially limit the jaw holder 4 when the rear sleeve 2 rotates. The elastic member 5 is mounted on the drill body 3, with one end of the elastic member 5 fixed relative to the drill body 3 and the other end of the elastic member 5 fixed relative to the jaw holder 4.

[0042] The drill body 3 is located in the space enclosed by the front sleeve 1 and the rear sleeve 2. The side where the front sleeve 1 is located is defined as the front side of the drill chuck (refer to Figure 1 and Figure 3 The side where the rear sleeve 2 is located is the rear side of the drill chuck (reference Figure 1 and Figure 3 The front sleeve 1 is located at the front side of the drill body 3 in the axial direction, and the rear sleeve 2 is located at the rear side of the drill body 3 in the axial direction.

[0043] It is easy for those skilled in the art to understand that, in the axial direction along the drill body 3, the end of the front sleeve 1 away from the rear sleeve 2 is the front end of the front sleeve 1, and the end of the front sleeve 1 close to the rear sleeve 2 is the rear end of the front sleeve 1; the end of the rear sleeve 2 away from the front sleeve 1 is the rear end of the rear sleeve 2, and the end of the rear sleeve 2 close to the front sleeve 1 is the front end of the rear sleeve 2; the end of the jaw holder 4 close to the rear sleeve 2 is the rear end of the jaw holder 4, and the end of the jaw holder 4 close to the front sleeve 1 is the front end of the jaw holder 4.

[0044] In some implementations, reference Figure 1 As shown, the front end of the drill body 3 is connected to the front end face of the front sleeve 1 via a first retaining spring 101. Specifically, the front end of the drill body 3 has a first connecting groove, and the front end face of the front sleeve 1 is concavely formed with a first recessed platform. The groove wall of the first connecting groove facing away from the front end face of the drill body 3 is flush with the bottom surface of the first recessed platform. The first retaining spring 101 is accommodated in the first connecting groove, and the radial outer edge of the first retaining spring 101 is exposed outside the first connecting groove and abuts the bottom surface of the first recessed platform, thereby connecting the drill body 3 to the front sleeve 1 via the first retaining spring 101.

[0045] In some implementations, reference Figure 1 As shown, the rear end of the drill body 3 is connected to the rear end face of the rear sleeve 2 via a second retaining spring 102. Specifically, the rear end of the drill body 3 has a second connecting groove, and the rear end face of the rear sleeve 2 is concave to form a second recessed platform. The groove wall of the second connecting groove facing away from the rear end face of the drill body 3 is flush with the bottom surface of the second recessed platform. The second retaining spring 102 is accommodated in the second connecting groove, with the radial outer edge of the second retaining spring 102 protruding from the second connecting groove and resting on the bottom surface of the second recessed platform, thereby connecting the drill body 3 and the rear sleeve 2 together via the second retaining spring 102.

[0046] In addition, the drill body 3 is provided with a plurality of jaw holes 31, which are arranged at intervals along the circumference of the drill body 3. The drill chuck includes a plurality of jaws 6, which are arranged one-to-one with the jaw holes 31. The plurality of jaws 6 form a clamping space for the clamped object to be inserted. For example, referring to Figure 1 As shown, three clamping jaw holes 31 are provided on the drill body 3 , and a clamping jaw 6 is mounted in each clamping jaw hole 31 .

[0047] Each clamping jaw 6 has an inclined surface on one side facing away from the clamping space. The inclined surface of each clamping jaw 6 is inclined outwardly in the direction from the front end surface of the front sleeve 1 to the rear end surface of the rear sleeve 2 away from the axis of the drill body 3.

[0048] It should be noted that the above-mentioned jaw holder 4 is sleeved on the drill body 3 and abuts against the jaw 6. Specifically, it can be understood that the jaw holder 4 is arranged around the circumferential outside of the drill body 3, and the inner wall of the jaw holder 4 abuts against the inclined surface of each jaw 6.

[0049] During insertion of the object, jaws 6 move radially outward and expand along the drill body 3, widening the clamping space for insertion. As jaws 6 expand, they abut against jaw retainer 4, which, driven by jaws 6, moves toward the front end of the drill body 3. Jaw retainer 4 presses elastic member 5 toward the front or rear end of the drill body 3. The reaction force of elastic member 5 not only ensures the object is coaxial with the drill body 3 during insertion, but also enhances the pre-tightening effect of jaws 6 on the object. When the clamped object is inserted into the clamping space, the rear sleeve 2 is rotated to make the rear sleeve 2 threadedly engaged with the clamping jaw holder 4, so that the clamped object inserted into the clamping space can be clamped. With this arrangement, there is no need to rotate the rear sleeve 2 during the process of expanding the clamping jaws 6 to insert the clamped object. Compared with the solution in the prior art in which the clamping jaws 6 are driven to open by rotating the rotating sleeve, the number of rotations of the rear sleeve 2 during the process of inserting the clamped object to be clamped is reduced, thereby shortening the stroke of the rear sleeve 2 and improving the clamping efficiency of the clamped object, thereby achieving rapid clamping, saving time and effort, and being more convenient to use.

[0050] That is to say, during the insertion of the clamped object, there is no need to rotate the rear sleeve 2; when the clamped object is inserted into place, the rear sleeve 2 is rotated to thread the rear sleeve 2 and the clamping claw holder 4, so that the clamped object can be clamped, reducing the number of rotations of the rear sleeve 2 and shortening the stroke required for the rear sleeve 2 to clamp the clamped object, that is, the clamped object can be clamped quickly, the clamping efficiency is high, and time and effort are saved.

[0051] When the tool is to be pulled out, the rear sleeve 2 is rotated in the opposite direction to release the threaded engagement between the rear sleeve 2 and the clamping jaw holder 4. At the same time, the elastic member 5 squeezes the clamping jaw holder 4 in the opposite direction, that is, the clamping jaw holder 4 moves toward the rear end of the drill body 3 under the action of the elastic force of the elastic member 5, and the clamping jaw holder 4 pushes against the clamping jaw 6, so that the clamping jaw 6 moves inwardly along the radial direction of the drill body 3 and closes, and the clamping space is closed. In this way, after the rear sleeve 2 and the clamping jaw holder 4 are loosened and the threaded engagement is released, the clamping object is pulled out of the drill body 3. Compared with the solution of the prior art that the clamping jaw 6 is closed by rotating the rotating sleeve, the closing of the clamping jaw 6 in this embodiment does not require the rotation of the rear sleeve 2 to drive the rotation of the rear sleeve 2, which reduces the number of rotations of the rear sleeve 2 during the process of pulling out the clamping object, thereby shortening the stroke of the rear sleeve 2 and improving the pulling-out efficiency of the clamped object, thereby making it possible to achieve quick pulling out, saving time and effort, and being more convenient to use.

[0052] That is to say, after the rear sleeve 2 is rotated in the opposite direction to release the threaded connection between the rear sleeve 2 and the clamping jaw holding member 4, the clamping jaw 6 can be closed under the action of the elastic member 5. Therefore, in the process of pulling out the clamped object, the clamped object can be easily pulled out without continuously rotating the rear sleeve 2, which reduces the number of rotations of the rear sleeve 2 and the stroke required for the rear sleeve 2 to pull out the clamped object. That is, the clamped object can be quickly pulled out, the pulling and disassembly efficiency is high, and time and effort are saved.

[0053] In a specific implementation, the elastic member may be, for example, a spring.

[0054] By providing a first positioning portion 81 on the clamping jaw holder 4 and a second positioning portion 82 on the drill body 3, the cooperation of the first positioning portion 81 and the second positioning portion 82 can limit the circumferential position of the clamping jaw holder 4. In this way, during the insertion and extraction of the clamped object, the clamping jaw holder 4 can only move along the axial direction of the drill body 3 and will not rotate along the circumferential direction of the drill body 3, so that the rotation efficiency of the rear sleeve 2 is higher, and the speed of clamping and extraction is further improved.

[0055] The drill chuck provided in this embodiment is provided with a drill body 3, a front sleeve 1 sleeved on the front side of the drill body 3, a rear sleeve 2 sleeved on the rear side of the drill body 3, a clamping jaw holder 4, an elastic member 5, and a clamping jaw 6 is provided in the clamping jaw hole 31 of the drill body 3; the clamping jaw holder 4 is sleeved on the drill body 3 and abuts against the clamping jaw 6, the clamping jaw holder 4 is located between the drill body 3 and the rear sleeve 2, and can be threadedly connected to the rear sleeve 2. A first positioning portion 81 is provided on the clamping jaw holder 4, and a second positioning portion 82 is provided on the drill body 3. During the rotation of the rear sleeve 2, the clamping jaw holder 4 can move axially along the drill body 3 under the action of the first positioning portion 81 and the second positioning portion 82, but will not rotate circumferentially of the drill body 3. The elastic member 5 is sleeved on the drill body 3, and one end of the elastic member 5 is relatively fixed to the drill body 3, and the other end of the elastic member 5 is relatively fixed to the clamping jaw holder 4. In this way, when the clamped object is inserted from the front end of the drill body 3, the clamping jaw 6 moves radially outward along the drill body 3 and expands. The clamping jaw 6 abuts against the clamping jaw holder 4, causing the clamping jaw holder 4 to move toward the front end or rear end of the drill body 3. The clamping jaw holder 4 presses the elastic member 5 toward the front end or rear end of the drill body 3, so that the clamped object is coaxially inserted into the drill body 3 and pre-tightened in the drill body 3. When the clamped object is inserted into place, the rear sleeve 2 is rotated to threadably engage with the clamping jaw holder 4, thereby achieving clamping and locking of the clamped object. When it is necessary to pull out the clamped object, it is only necessary to rotate the rear sleeve 2 in the opposite direction to release the threaded engagement between the rear sleeve 2 and the clamping jaw holder 4. The clamping jaw holder 4 can be moved toward the rear end of the drill body 3 under the elastic force of the elastic member 5, so that the clamping jaws 6 move inwardly along the radial direction of the drill body 3 and close, so that the clamped object can be pulled out more easily. That is to say, the drill chuck provided in this embodiment does not require continuous rotation of the rear sleeve 2 to drive the clamping jaws 6 to open or close during the insertion and extraction of the clamped object. Compared with the prior art solution that requires continuous rotation of the rotating sleeve to drive the clamping jaws 6 to open or close in order to insert, clamp, or loosen and extract the clamped object, the number of revolutions of the rear sleeve 2 required to be rotated during the clamping or loosening process is reduced to a certain extent, thereby reducing the stroke of the rear sleeve 2, improving the efficiency of clamping and loosening the clamped object, saving time and effort, and being more convenient to use.

[0056] In some embodiments, reference Figure 4 and Figure 9 As shown, the jaw holder 4 includes a collar 41 and a connecting arm 42. The collar 41 is sleeved on the drill body 3, and the connecting arm 42 is arranged on the side of the collar 41 facing the rear sleeve 2 and extends along the axial direction of the drill body 3 toward the rear sleeve. The connecting arm 42 can be threadedly connected to the rear sleeve 2, with a simple structure, easy to manufacture, and convenient and stable connection.

[0057] refer to Figure 3 and Figure 4 As shown, in some embodiments, the side of the collar 41 facing the front sleeve 1 has an abutting ring segment 411 for abutting against the clamping jaws 6. The abutting ring segment 411 matches the clamping jaws 6 to achieve the expansion and closing of the clamping jaws 6. Compared with the prior art solution of providing an internal thread 72 on the inner wall of the clamping jaw holder 4 and an external thread 71 on the inclined surface of the clamping jaw 6, and driving the expansion and closing of the clamping jaws 6 by the threaded cooperation between the clamping jaw holder 4 and the clamping jaw 6, the expansion and closing of the clamping jaws 6 is easier to achieve, and the clamped object can be clamped and released more quickly.

[0058] In some embodiments, reference Figure 4 As shown, the first positioning portion 81 is a positioning protrusion, the connecting arm 42 is formed as a positioning protrusion, and the second positioning portion 82 is a positioning groove for the positioning protrusion to extend into, and the positioning groove is provided on the outer wall of the drill body 3.

[0059] That is to say, the positioning protrusion is formed to extend rearwardly along the axial direction of the jaw holder 4 in the direction away from the front sleeve 1, that is, the positioning protrusion extends along the axial direction of the jaw holder 4 toward the rear end of the drill chuck. This arrangement not only makes the structure of the drill chuck more compact, but also makes the cooperation between the axially extending positioning protrusion and the positioning groove better for the circumferential limiting effect of the jaw holder 4.

[0060] refer to Figure 1 and Figure 6 As shown, in some embodiments, the groove wall of the positioning groove on the side away from the axis of the drill body 3 is open, which is convenient for the positioning protrusion to extend therein and facilitates assembly.

[0061] refer to Figure 1 、 Figure 3 and Figure 6 As shown, in some embodiments, a positioning flange 32 is provided on the outer wall of the drill body 3, and a positioning groove is opened on the positioning flange 32, which has a simple structure and is easy to implement.

[0062] The positioning flange 32 can be integrally formed with the drill body 3, which has good integrity and high structural strength. Of course, the positioning flange 32 can also be an independent component, fixed on the outer wall of the drill body 3 using an interference fit or groove structure.

[0063] In other implementations, the first positioning portion 81 may be, for example, a positioning groove, and the second positioning portion 82 may be, for example, a positioning protrusion extending along the axial direction of the jaw holder 4 toward the front end of the drill chuck.

[0064] In some other embodiments, reference Figure 9 As shown, the first positioning portion 81 is a positioning protrusion arranged on the inner wall of the collar 41, and the positioning protrusion can, for example, extend radially inwardly along the collar 41. The second positioning portion 82 is a positioning groove for the positioning protrusion to extend into, and the positioning groove is arranged on the outer wall of the drill body 3. The positioning groove is arranged radially along the drill body 3 and the notch is outward. The clamping jaw hole 31 can, for example, be formed as a positioning groove.

[0065] In some embodiments, reference Figure 3 and Figure 4 As shown, the outer wall of the connecting arm 42 is provided with an external thread 71, and the inner wall of the rear sleeve 2 is provided with an internal thread 72 that matches the external thread 71. This structure is simple, easy to manufacture, and provides a convenient and secure connection. Furthermore, the internal thread 72 is provided with a receiving groove 23 for accommodating the positioning protrusion. This arrangement not only makes the drill chuck more compact, but also enables the cooperation between the axially extending positioning protrusion and the positioning groove to better limit the circumferential position of the jaw retainer 4.

[0066] In other embodiments, reference Figure 8 and Figure 9 As shown, an internal thread 72 is provided on the inner wall of the connecting arm 42, a boss is provided on the rear sleeve 2, and an external thread 71 matching the internal thread 72 is provided on the outer wall of the boss. The structure is simple, easy to manufacture, and the connection is convenient and firm.

[0067] Furthermore, as those skilled in the art will appreciate, the mating locking portion includes a locking thread and a receiving groove, the mating locking portion is fixed in an axial position relative to the drill body and rotates circumferentially, the mating locking portion may be an independent component (such as an independent boss) or the mating locking portion may be provided on the drill chuck sleeve (optionally provided on the front sleeve or the rear sleeve).

[0068] refer to Figure 1 、 Figure 2 and Figure 5 As shown, in some embodiments, an avoidance groove 21 for the positioning protrusion to pass through is provided on the rear end surface of the rear sleeve 2, so that during the axial movement of the clamping jaw holder 4 along the drill body 3, interference between the clamping jaw holder 4 and the rear sleeve 2 can be avoided, and the use safety is higher.

[0069] In a specific implementation, the shape of the avoidance groove 21 may, for example, match the structure of the transverse cross section of the positioning protrusion.

[0070] refer to Figure 1 and Figure 7As shown, in some embodiments, an arcuate groove 62 is provided on the rear end surface of the clamping jaw 6, and the extension direction of the arcuate groove 62 (refer to Figure 1 The dotted line L1 in the figure) and the moving direction of the clamp 6 (reference Figure 1 A rolling body 63 is movably provided in the arc groove 62, and the side of the rolling body 63 facing away from the front sleeve 1 (i.e., the rear end surface of the rolling body 63) is exposed outside the arc groove 62 and abuts against the drill body 3.

[0071] By making the extension direction of the arc groove 62 perpendicular to the moving direction of the clamping jaw 6, the rolling body 63 is arranged in the arc groove 62, so that the axis of the rolling body 63 is perpendicular to the moving direction of the clamping jaw 6. In this way, when the clamping jaw 6 moves along the radial direction of the drill body 3 to expand and close, the moving direction of the clamping jaw 6 is consistent with the rotation direction of the rolling body 63, so that the movement efficiency of the clamping jaw 6 is better and it is convenient to insert or remove the clamped object.

[0072] In addition, by providing an arcuate groove 62 on the rear end face of the clamping jaw 6, arranging a rolling body 63 in the arcuate groove 62, and making the rear end face of the rolling body 63 abut against the drill body 3, since the rolling body 63 can move relative to the drill body 3, the friction and wear between the clamping jaw 6 and the drill body 3 are reduced to a certain extent, which helps to extend the service life.

[0073] refer to Figure 1 and Figure 7 As shown, in a specific implementation, there are two arc-shaped grooves 62, which are spaced apart along the moving direction of the clamping jaw 6, and a rolling body 63 is provided in each arc-shaped groove 62, so that the movement efficiency of the clamping jaw 6 is higher, and at the same time, the friction and wear between the clamping jaw 6 and the drill body 3 are further reduced, so that the service life of the drill chuck is longer.

[0074] refer to Figure 6 and Figure 7 As shown, in some embodiments, a first guide portion 91 is provided on the clamping jaw 6, and a second guide portion 92 is provided on the hole wall of the clamping jaw hole 31. The second guide portion 92 cooperates with the first guide portion 91 to guide the movement of the clamping jaw 6, which to a certain extent avoids the shaking of the clamping jaw 6 along the axial direction of the drill body 3 during the expansion and closing process, making the movement of the clamping jaw 6 smoother, thereby making the insertion and extraction of the clamped object smoother and more stable.

[0075] In specific implementation, the first guide part 91 includes, for example, a guide protrusion arranged on the outer wall of the clamp, and the extension direction of the guide protrusion is parallel to the movement direction of the clamp 6. The second guide part 92 includes a guide groove for the guide protrusion to extend into. It has a simple structure and is easy to manufacture, and has a good guiding effect on the radial movement of the clamp 6.

[0076] In specific implementation, the positioning protrusion can be provided only on one side of the clamping jaw 6, or the guiding protrusion can be provided on both sides of the clamping jaw 6. It can be arbitrarily selected according to the specific use conditions, and no excessive restrictions are made here.

[0077] For example, refer to Figure 7 As shown, positioning protrusions are provided on both sides of the clamping jaw 6, and the positioning protrusions on both sides are at the same height on the clamping jaw 6. Furthermore, the two positioning protrusions can be provided at the rear end of the clamping jaw 6, so that the rear end of the clamping jaw 6 forms a T-shaped structure, which has a better guiding effect. At the same time, the length of the arc-shaped groove 62 is increased, thereby allowing the arrangement of a larger rolling element 63, further reducing the friction and wear between the clamping jaw 6 and the drill body 3.

[0078] refer to Figure 7 As shown, in some embodiments, a guide section 61 for guiding the clamped object is provided on the side of the jaw 6 facing the axis of the drill body 3, and the guide section 61 is located at the front end of the jaw 6 and is formed into a guide arc surface that matches the insertion direction of the clamped object, so as to facilitate smooth insertion of the clamped object and achieve better use effect.

[0079] In some embodiments, reference Figure 4 and Figure 5 There are three first positioning portions 81, which are spaced apart along the circumference of the clamping jaw holder 4. There are three second positioning portions 82, and one second positioning portion 82 corresponds to one first positioning portion 81. This arrangement makes the circumferential limiting effect of the clamping jaw holder 4 better, making the movement of the clamping jaw holder 4 in the axial direction of the drill body 3 more stable and smooth, further facilitating the rapid clamping and extraction of the clamped object.

[0080] For specific implementation, refer to Figure 2 As shown, an avoidance groove 21 is provided on the rear end surface of the rear sleeve 2, and the avoidance groove 21 is provided in a one-to-one correspondence with the positioning protrusion.

[0081] refer to Figure 6 As shown, the drill body 3 is provided with at least two positioning grooves for the positioning protrusions to penetrate, and the positioning grooves are provided in a one-to-one correspondence with the positioning protrusions.

[0082] For specific implementation, refer to Figure 1 、 Figure 2 and Figure 6 As shown, a positioning flange 32 is provided on the outer wall of the drill body 3, and a stop arm 22 is provided at the position of the rear sleeve 2 corresponding to the positioning flange 32. The stop arm 22 stops on the side of the positioning flange 32 facing away from the front sleeve 1. In this way, the rear sleeve 2 can be axially limited by the positioning flange 32 to prevent it from excessive rotation and damaging the drill chuck.

[0083] In some embodiments, reference Figure 1 and Figure 3As shown, the elastic member 5 is located between the side of the clamping jaw holder 4 facing away from the rear sleeve 2 and the front sleeve 1.

[0084] The two ends of the elastic member 5 can be fixed relative to the collar 41 and the front sleeve 1 respectively. Of course, the end of the elastic member 5 that is away from the clamping jaw retainer 4 can also be fixed relative to the first retaining spring 101.

[0085] During use, when inserting a clamped object from the front end of the drill body, the jaws move radially outward along the drill body and expand. The jaws press against the jaw retaining member, causing the jaw retaining member to move toward the front end of the drill body. The jaw retaining member squeezes the elastic member toward the front end of the drill body, causing the clamped object to be coaxially inserted into the drill body and pre-tightened within the drill body. The rear sleeve is then rotated to engage the threads of the rear sleeve with the threads on the jaw retaining member, ensuring that the jaws securely clamp. When it is necessary to remove the clamped object, the rear sleeve is simply rotated in the opposite direction to release the threaded engagement between the rear sleeve and the jaw retaining member. The elastic member expands and resets, and the jaw retaining member moves toward the rear end of the drill body under the elastic force of the elastic member, causing the jaws to move radially inward along the drill body and close, thereby making it easier to remove the clamped object.

[0086] In other embodiments, reference Figure 8 As shown, the elastic member 5 is located between the side of the clamping jaw holder 4 facing away from the front sleeve 1 and the rear sleeve 2.

[0087] During use, when inserting a clamped object from the front end of the drill body, the jaws move radially outward along the drill body and expand. The jaws then press against the jaw retaining member, causing the jaw retaining member to move toward the rear end of the drill body. The jaw retaining member compresses the elastic member toward the rear end of the drill body, allowing the clamped object to be coaxially inserted into the drill body and pre-tightened within the drill body. The rear sleeve is then rotated to engage the threads of the rear sleeve with the threads on the jaw retaining member, ensuring that the jaws securely clamp. When it is necessary to remove the clamped object, the rear sleeve is simply rotated in the opposite direction to release the threaded engagement between the rear sleeve and the jaw retaining member. The elastic member is reset, and the jaw retaining member moves toward the front end of the drill body under the elastic force of the elastic member, causing the jaws to move radially inward along the drill body and close, thereby allowing the clamped object to be relatively easily removed.

[0088] In some implementations, a stopper, such as a flange, is provided at one end of the drill body 3 facing the rear sleeve 2. Figure 8 As shown, the two ends of the elastic member 5 can be fixed relative to the flange and the collar 41 respectively, for example.

[0089] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0090] The foregoing description is intended only to provide specific embodiments of the present disclosure, intended to enable those skilled in the art to understand and implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the embodiments described herein, but rather to be construed in the broadest manner consistent with the principles and novel features disclosed herein.

Claims

1. A drill chuck, characterized in that: It comprises a drill body, a clamping jaw holding member, a matching locking portion, an elastic member, and a clamping jaw located in a clamping jaw hole of the drill body; The jaw holder is sleeved on the drill body and abuts against the jaw; the mating locking portion includes a locking thread and a receiving groove, the mating locking portion is fixed in an axial position relative to the drill body and circumferentially rotates; the jaw holder can be threadedly connected to the mating locking portion, and when the jaw holder is threadedly disengaged from the mating locking portion, the jaw holder is axially translated; the receiving groove is parallel to the axis of the mating locking portion and passes through the locking thread; The clamping jaw holder is provided with a first positioning portion, and the drill body is provided with a second positioning portion, the first positioning portion and the second positioning portion cooperate to limit the clamping jaw holder circumferentially relative to the drill body and enable axial movement; The elastic member provides a driving force for driving the clamping jaw holding member to close the clamping jaws.

2. The drill chuck according to claim 1, characterized in that The clamping jaw holder includes a collar and a connecting arm; The collar is sleeved on the drill body and abuts against the clamping jaw. The connecting arm is arranged on one side of the collar and extends along the axial direction of the drill body. The connecting arm is provided with a thread and can be threadedly connected with the matching locking portion.

3. The drill chuck according to claim 2, characterized in that The first positioning portion is a positioning protrusion, the connecting arm is formed as the positioning protrusion, the second positioning portion is a positioning groove for the positioning protrusion to extend into, and the positioning groove is provided on the outer wall of the drill body.

4. The drill chuck according to claim 3, characterized in that The groove wall of the positioning groove on the side away from the axis of the drill body is open; And / or, a positioning flange is provided on the outer wall of the drill body, and the positioning groove is provided on the positioning flange.

5. The drill chuck according to claim 2, characterized in that The first positioning portion is a positioning protrusion provided on the inner wall of the collar, and the positioning protrusion extends radially inwardly along the collar. The second positioning portion is a positioning groove into which the positioning protrusion can extend, and the clamping jaw hole is formed as the positioning groove.

6. The drill chuck according to claim 2, characterized in that An external thread is provided on the outer wall of the connecting arm, an internal thread matching the external thread is provided on the inner wall of the matching locking portion, and an accommodating groove for accommodating the positioning protrusion is provided on the internal thread; Alternatively, an internal thread is provided on the inner wall of the connecting arm, an external thread matching the internal thread is provided on the outer wall of the matching locking portion, and an accommodating groove for accommodating the positioning protrusion is provided on the external thread.

7. The drill chuck according to claim 1, characterized in that An arc groove is provided on the rear end surface of the clamping jaw, the extension direction of the arc groove is perpendicular to the moving direction of the clamping jaw, a rolling body is movably arranged in the arc groove, and one side of the rolling body is exposed outside the arc groove and abuts against the drill body.

8. The drill chuck according to claim 1, characterized in that The clamping jaw is provided with a first guide portion, and the wall of the clamping jaw hole is provided with a second guide portion, and the second guide portion cooperates with the first guide portion to guide the movement of the clamping jaw; The first guide portion includes a guide protrusion provided on the outer wall of the clamping jaw, wherein an extending direction of the guide protrusion is parallel to a moving direction of the clamping jaw, and the second guide portion includes a guide groove into which the guide protrusion can extend.

9. The drill chuck according to any one of claims 1 to 8, characterized in that A guide section for guiding the clamped object is provided on one side of the clamping jaw facing the axis of the drill body, and the guide section is located at the front end of the clamping jaw and forms a guide arc surface matching the insertion direction of the clamped object.

10. The drill chuck according to any one of claims 1 to 8, characterized in that The matching locking portion is an independent component or is arranged on the drill chuck sleeve.

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