Jaw of drill chuck, drill chuck and method for assembling jaw

Abstract

The present disclosure relates to a jaw of a drill chuck, a drill chuck, and a method for assembling the jaw. The jaw includes a jaw body and a jaw cutting edge band. One side of the jaw body has a clamping inclined surface that extends obliquely with respect to the axis of the jaw body. A jaw groove is formed in the clamping inclined surface. The jaw cutting edge band can contract during cooling to enter the jaw groove and, after the cooling contraction state is restored, is in interference fit with the jaw groove, so that the jaw cutting edge band can be reliably installed in the jaw groove on the jaw body without hot working and without additional connecting parts such as welding agents, and thermal deformation of the jaw can be avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of drill tools, and particularly relates to a jaw of a drill chuck, a drill chuck, and a method for assembling the jaw. Background Art

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

[0003] The drill chuck includes: a drill body and jaws mounted on the drill body. The clamping of the drill tool and the like is achieved through the cooperation of multiple jaws. Among them, the jaw has a jaw cutting edge band. When clamping, the jaw cutting edge band contacts the drill tool to achieve the clamping of the drill tool. In order to obtain a better clamping effect, the prior art improves the hardness and wear resistance of the jaw cutting edge band by quenching the jaw. However, this processing method belongs to hot processing, which will cause the jaw to undergo thermal deformations such as twisting and warping, affecting the normal use of the jaw.

[0004] Based on this, another prior art first manufactures the jaw cutting edge band to make a jaw cutting edge band with hardness and other requirements met, and then welds the manufactured jaw cutting edge band with hardness and other requirements met to the jaw body through a welding agent to form a jaw. However, welding also belongs to hot processing, which will cause the jaw to undergo thermal deformation during the production process, and the presence of the welding agent will affect the assembly accuracy of the jaw cutting edge band. Summary of the Invention

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a jaw of a drill chuck, a drill chuck, and a method for assembling the jaw.

[0006] In a first aspect, the present disclosure provides a jaw of a drill chuck, including a jaw body and a jaw cutting edge band. One side of the jaw body has a clamping inclined surface, the clamping inclined surface extends obliquely with respect to the axis of the jaw body, and a jaw groove is formed in the clamping inclined surface; the jaw cutting edge band can shrink during cooling to enter the jaw groove, and is in interference fit with the jaw groove after the cooling shrinkage state is restored.

[0007] Optionally, the notch of the jaw groove has a convex portion that can be bent in the direction of the jaw cutting edge band, so as to press against the jaw cutting edge band after the jaw cutting edge band enters the jaw groove.

[0008] Optionally, both sides of the notch of the jaw groove have the convex portion.

[0009] Optionally, the convex portion is formed by multi-point riveting of the notch;

[0010] Alternatively, the convex portion is formed by roll riveting the notch.

[0011] Optionally, the jaw cutting edge band includes a cutting edge band body and a clamping portion provided on one side of the cutting edge band body outside the notch facing the jaw groove;

[0012] At least a part of the surface of the cutting edge band body that cooperates with the jaw groove has an anti-slip structure.

[0013] Optionally, the anti-slip structure includes a plurality of anti-slip protrusions arranged at intervals along the surface of the cutting edge band body, and the anti-slip protrusions protrude in a direction away from the cutting edge band body.

[0014] Optionally, in the direction away from the cutting edge band body, the cross-sectional dimension of the anti-slip protrusion gradually decreases.

[0015] Optionally, the anti-slip structure is provided on the side wall of the cutting edge band body corresponding to the groove wall of the jaw groove;

[0016] And / or, the anti-slip structure is provided on the bottom wall of the cutting edge band body corresponding to the groove bottom of the jaw groove.

[0017] In a second aspect, the present disclosure provides a drill chuck, including a drill body and the jaw as described above;

[0018] A jaw inclined hole is provided on the drill body, and the jaw is located in the jaw inclined hole;

[0019] A nut is assembled on the drill body, and a thread for mating and engaging with the nut is provided on the jaw body, and the thread is located on the side of the jaw body opposite to the clamping inclined surface.

[0020] In a third aspect, the present disclosure provides a method for assembling the jaws of the drill chuck as described above, the method including:

[0021] Cool the jaw cutting edge band to cause the jaw cutting edge band to contract;

[0022] Place the cooled jaw cutting edge band into the jaw groove so as to have an interference fit with the jaw groove after the cooling and contraction state of the jaw cutting edge band is restored.

[0023] The technical solutions provided by the embodiments of the present disclosure have the following advantages compared with the prior art:

[0024] The drill chuck jaws, drill chuck and method for assembling the jaws provided by the present invention provide a jaw groove on the clamping inclined surface, cool the jaw blade that has been manufactured and has the required hardness, shrink the jaw blade, and allow the jaw blade to smoothly enter the jaw groove. After the jaw blade is cooled and shrinks, the jaw blade can achieve an interference fit with the jaw groove, so that the jaw blade is embedded in the jaw groove. The jaw blade can be effectively fixed in the jaw groove without hot processing or additional connectors such as welding agents, thereby avoiding thermal deformation such as warping and twisting of the jaw blade and the jaw body, and ensuring the assembly accuracy of the jaw, thereby ensuring the normal use of the jaw. 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 invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 It is a structural schematic diagram of the clamping jaws described in an embodiment of the present disclosure;

[0028] Figure 2 A schematic structural diagram of the clamping jaws according to an embodiment of the present disclosure from another perspective;

[0029] Figure 3 It is a structural disassembled diagram of the clamping jaw edge band of the clamping jaw according to the embodiment of the present disclosure when it is not assembled in the clamping jaw groove;

[0030] Figure 4 It is a structural schematic diagram of the clamping jaws according to an embodiment of the present disclosure from another perspective;

[0031] Figure 5 It is a structural schematic diagram of the drill chuck according to the embodiment of the present disclosure (partial cross-section);

[0032] Figure 6 It is a partial structural cross-sectional view of the drill chuck according to the embodiment of the present disclosure;

[0033] Figure 7 It is a side structural diagram of the clamping jaw according to an embodiment of the present disclosure;

[0034] Figure 8 It is a structural schematic diagram of the drill chuck according to an embodiment of the present disclosure;

[0035] Figure 9 The enlarged view of the structure at position I in Figure 8 ;

[0036] Figure 10 The schematic structural diagram of the jaw described in the embodiment of the present disclosure before multi-point riveting;

[0037] Figure 11 The schematic structural diagram of the groove being riveted by the riveting roller cutter described in the embodiment of the present disclosure;

[0038] Figure 12 is Figure 11 The corresponding side sectional view;

[0039] Figure 13 The schematic structural diagram of the groove not being riveted described in the embodiment of the present disclosure;

[0040] Figure 14 The schematic diagram of the state where the convex part formed on the groove presses against the jaw blade belt described in the embodiment of the present disclosure;

[0041] Figure 15 The schematic structural diagram of multiple jaws and the drill bit shank described in the embodiment of the present disclosure;

[0042] Figure 16 The schematic structural diagram of the anti-slip structure provided on the bottom wall of the jaw blade belt described in the embodiment of the present disclosure;

[0043] Figure 17 The schematic structural diagram of the anti-slip structure provided on the side wall of the jaw blade belt described in the embodiment of the present disclosure;

[0044] Figure 18 The schematic structural diagram of the jaw described in the embodiment of the present disclosure (with an anti-slip structure provided on the jaw blade belt).

[0045] Among them, 100 is the drill chuck; 1 is the jaw; 11 is the jaw body; 111 is the clamping inclined surface; 112 is the jaw groove; 113 is the convex part; 114 is the thread; 115 is the riveting point; 12 is the jaw blade belt; 121 is the blade belt body; 122 is the clamping part; 123 is the anti-slip protrusion; 2 is the drill body; 21 is the jaw inclined hole; 3 is the nut; 4 is the nut sleeve; 5 is the bushing; 6 is the front sleeve; 7 is the riveting roller cutter; 8 is the drill bit shank. Detailed implementation manners

[0046] In order to more clearly understand the above-mentioned objects, features and advantages of the present disclosure, the solutions of the present disclosure will be further described below. It should be noted that, without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0047] In the following description, numerous specific details are set forth to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present disclosure, rather than all of the embodiments.

[0048] The drill chuck includes: a drill body and jaws mounted on the drill body. The clamping of a drill tool or the like is achieved through the cooperation of multiple jaws. The jaws have threads that are matingly engaged with the nuts on the drill body. Among them, the jaws have jaw cutting edges. When clamping, the jaw cutting edges contact the drill tool to achieve the clamping of the drill tool. In order to obtain a better clamping effect, the prior art improves the hardness and wear resistance of the jaw cutting edges by quenching the jaws. However, this processing method belongs to hot processing, which will cause thermal deformation such as distortion and warping of the jaws, especially the thermal deformation of the jaw cutting edges and the threads, affecting the normal use of the jaws.

[0049] Another prior art method is to first manufacture the jaw cutting edges to make the hardness and other requirements meet the standards, and then weld the manufactured jaw cutting edges that meet the requirements onto the jaw body with a welding agent to form the jaws. However, welding also belongs to hot processing, which will cause thermal deformation of the jaws during the production process, and the presence of the welding agent will affect the assembly accuracy of the jaw cutting edges.

[0050] Based on this, this embodiment provides a jaw of a drill chuck, a drill chuck, and a method for assembling the jaws, which can achieve the assembly of the jaw cutting edges without hot processing or connecting parts such as welding agents, so that the jaw cutting edges that meet the requirements of hardness and the like are firmly fixed in the jaw grooves.

[0051] The following describes the jaws, the drill chuck, and the method for assembling the jaws through specific embodiments:

[0052] Embodiment 1

[0053] Referring to Figures 1 to 4 As shown, this embodiment provides a jaw 1 of a drill chuck, including: a jaw body 11 and a jaw cutting edge 12.

[0054] The jaw body 11 has a clamping inclined surface 111 and a thread 114. Among them, the clamping inclined surface 111 is located on one side of the jaw body 11, and the thread 114 is located on the side of the jaw body 11 opposite to the clamping inclined surface 111. Specifically, the jaw body 11 may be a cylinder, and of course, it may also be of other shapes. The clamping inclined surface 111 extends obliquely with respect to the axis of the jaw body 11, that is, there is an angle between the clamping inclined surface 111 and the axis of the jaw body 11. Among them, a jaw groove 112 is provided on the clamping inclined surface 111. The jaw cutting edge 12 can shrink during cooling to enter the jaw groove 112 and be in interference fit with the jaw groove 112 after the cooling shrinkage state is restored.

[0055] It should be noted that the jaw cutting edge belt 12 here is a jaw cutting edge belt 12 with hardness, wear resistance and other properties meeting the requirements. That is, first, a jaw cutting edge belt 12 with hardness and wear resistance meeting the specific use requirements is made from a jaw blank, and the jaw cutting edge belt 12 is subjected to a cooling treatment.

[0056] Specifically, the jaw cutting edge belt 12 with hardness and other properties meeting the requirements can be placed in a cooling box with a preset cooling temperature for cooling. The preset cooling temperature can specifically be below -100°C, so that the jaw cutting edge belt 12 shrinks. Then, the shrunk jaw cutting edge belt 12 is placed into the jaw groove 112. After the cooling and shrinking state of the jaw cutting edge belt 12 is restored, for example, the environment where the jaw 1 equipped with the jaw cutting edge belt 12 is located is the environment when the drill chuck is used. Therefore, when the cooled and shrunk jaw cutting edge belt 12 is in this environment, its temperature gradually recovers. For example, the environment temperature is normal temperature. When the jaw cutting edge belt 12 returns to normal temperature, at this time, the jaw cutting edge belt 12 expands and has an interference fit with the jaw groove 112, thereby realizing the effective fixation of the jaw cutting edge belt 12. That is to say, the restoration of the cooling and shrinking state here is not a hot working on the jaw cutting edge belt 12, but the restoration of its cooling and shrinking state is achieved through heat exchange between the jaw cutting edge belt 12 and the air in the environment where the jaw body 11 is located. The environmental temperature when the cooled jaw cutting edge belt 12 is placed into the jaw groove 112 is higher than the temperature when the jaw cutting edge belt 12 is cooled.

[0057] It should be noted that when the jaw cutting edge belt 12 shrinks here, only the size of the jaw cutting edge belt 12 relatively shrinks. After shrinking and the restoration of the cooling and shrinking state, the jaw cutting edge belt 12 will not undergo deformations such as warping and twisting.

[0058] When the cooled jaw cutting edge belt 12 is placed into the jaw groove 112, the jaw cutting edge belt 12 can be lowered into the jaw groove 112 from above the groove opening. Or, the jaw cutting edge belt 12 enters the jaw groove 112 from one end of the jaw groove 112. How to place it specifically can be set according to the actual situation such as the shape of the jaw groove 112, and this embodiment does not limit this.

[0059] It can be understood that the material of the jaw cutting edge belt 12 is a material that can shrink upon cooling and expand after the restoration of the cooling and shrinking state, and during the whole process, the jaw cutting edge belt 12 will not undergo deformations such as warping and twisting. The jaw cutting edge belt 12 can specifically be made of cemented carbide, such as tungsten steel, or a metal material with a hardened substance coated on its surface, or a metal hardened by processes such as carburizing, nitriding and quenching, or other superhard materials such as ceramics.

[0060] In addition, the shape of the jaw cutting edge band 12 matches the shape of the jaw groove 112, and the size of the jaw cutting edge band 12 after cooling recovery matches the size of the jaw groove 112, so that the jaw cutting edge band 12 can enter the jaw groove 112 when cooling and shrinking, and can be embedded in the jaw groove 112 after cooling recovery. The specific shape and size of the jaw cutting edge band 12 can be set according to the actual requirements such as the shape and size of the jaw groove 112. Among them, the jaw groove 112 can be a square groove, a trapezoidal groove, or a dovetail groove.

[0061] Among them, one jaw groove 112 can hold one jaw cutting edge band 12, or multiple jaw cutting edge bands 12, and here multiple means two or more. When there are multiple jaw cutting edge bands 12 in the jaw groove 112, the multiple jaw cutting edge bands 12 are specifically arranged in sequence along the extending direction of the jaw groove 112, and there can be an interval between two adjacent jaw cutting edge bands 12.

[0062] Refer to Figures 5 to 9 As shown, the jaw 1 provided in this embodiment is specifically used on a drill chuck 100. The drill chuck 100 specifically includes a drill body 2 and a drill bit shank 8. Among them, a plurality of jaw inclined holes 21 are provided on the drill body 2. The plurality of jaw inclined holes 21 are centered on the axis of the drill body 2 and are evenly distributed along the circumferential direction of the drill body 2. One jaw inclined hole 21 is equipped with one jaw 1. That is, a plurality of jaws 1 enclose a clamping space. Among them, a nut 3 is assembled on the drill body 2, and the nut 3 is in matching meshing connection with the thread 114 on the jaw 1. A nut sleeve 4 is sleeved outside the nut 3, a bushing 5 is provided outside the nut sleeve 4, and a front sleeve 6 is provided outside the bushing 5. Among them, the nut 3 is connected to the nut sleeve 4, the front sleeve 6 is press-fitted with the bushing 5, and there is a driving jaw connection between the bushing 5 and the nut sleeve 4.

[0063] Among them, refer to Figure 6 and Figure 7 As shown, the angle b formed by the clamping inclined surface 111 and the axis of the jaw body 11 is the same as the angle a between the axis of the jaw inclined hole 21 on the drill body 2 and the axis of the drill body 2. The jaw cutting edge band 12 is parallel to the clamping inclined surface 111. The inner hole of the nut 3 is provided with a tapered thread, and the angle of the tapered thread is the same as the angle a formed by the jaw inclined hole 21 and the axis of the drill body 2.

[0064] When the front sleeve 6 is rotated, the front sleeve 6 drives the nut 3 to rotate through the bushing 5 and the nut sleeve 4, driving the jaw 1 to move back and forth in the jaw inclined hole 21. The circle formed by the plurality of jaw cutting edge bands 12 becomes larger or smaller according to the forward and backward movement of the jaw 1, so as to clamp drill tools with different diameters.

[0065] The jaw 1 of the drill chuck 100 provided in this embodiment is cooled by providing a jaw groove 112 on the clamping inclined surface 111 for the jaw cutting edge strip 12 that has been manufactured to meet requirements such as hardness, so that the jaw cutting edge strip 12 shrinks, enabling the jaw cutting edge strip 12 to smoothly enter the jaw groove 112. After the cooling and shrinking state of the jaw cutting edge strip 12 is restored, the jaw cutting edge strip 12 can achieve an interference fit with the jaw groove 112, thus realizing the embedding of the jaw cutting edge strip 12 in the jaw groove 112. There is no need for hot processing or additional connecting parts such as welding agents to effectively fix the jaw cutting edge strip 12 in the jaw groove 112, thereby avoiding thermal deformations such as warping and twisting of the jaw cutting edge strip 12 and the jaw body 11, ensuring the assembly accuracy of the jaw 1, and further ensuring the normal use of the jaw.

[0066] Referring to Figures 10 to 15 As shown, the notch of the jaw groove 112 has a convex portion 113 that can be bent in the direction towards the jaw cutting edge strip 12 to press against the jaw cutting edge strip 12 after the jaw cutting edge strip 12 enters the jaw groove 112.

[0067] That is to say, after the jaw cutting edge strip 12 is placed in the jaw groove 112, the notch of the jaw groove 112 is processed to form the convex portion 113, which presses against the jaw cutting edge strip 12, further ensuring the firm combination of the jaw cutting edge strip 12 and the jaw body 11. Specifically, after the interference fit between the jaw cutting edge strip 12 and the jaw groove 112, the notch can be processed to form the convex portion 113 that presses against the jaw cutting edge strip 12.

[0068] In some embodiments, both sides of the notch of the jaw groove 112 have the convex portion 113, which can further improve the stopping effect on the jaw cutting edge strip 12. Of course, in other embodiments, only one side of the notch of the jaw groove 112 can have the convex portion 113.

[0069] Referring to Figure 10 、 Figure 13 and Figure 14 As shown, in some embodiments, the convex portion 113 is formed by multi-point riveting of the notch. Specifically, the notch has a plurality of riveting points 115, and by riveting these plurality of riveting points 115, at least part of the notch is bent in the direction towards the jaw cutting edge strip 12 to form the convex portion 113.

[0070] Referring to Figures 11 to 14 As shown, in other embodiments, the convex portion 113 can also be formed by roll-riveting the notch. Specifically, the notch can be roll-riveted by a riveting roller cutter 7. Forming the convex portion by riveting makes it relatively convenient to form the convex portion 113.

[0071] It should be noted that when clamping a drill tool with the jaws, the main components are the thread 114 and the jaw cutting edge band 12. Therefore, when processing the notch to form the convex part 113, that is, the deformation of riveting and bending the notch will not affect the clamping, and the convex part can make the jaw cutting edge band 12 more stable, making the clamping more reliable.

[0072] Among them, the jaw cutting edge band 12 specifically includes: a cutting edge band body 121 and a clamping part 122 provided on one side of the cutting edge band body 121 facing away from the notch. At least part of the clamping part 122 is located outside the notch, and when using the jaw 1 to clamp a drill tool or the like, the clamping part 122 is in direct contact with the drill tool.

[0073] Referring to Figures 16 to 18 As shown, further, at least part of the surface of the cutting edge band body 121 that cooperates with the jaw groove 112 has an anti-slip structure. By setting the anti-slip structure, the tight fit between the jaw cutting edge band 12 and the jaw groove 112 can be further improved.

[0074] Specifically, the anti-slip structure may include: a plurality of anti-slip protrusions 123 arranged at intervals on the surface of the cutting edge band body 121, and the anti-slip protrusions 123 protrude in a direction away from the cutting edge band body 121. Preferably, in the direction away from the cutting edge band body 121, the cross-sectional dimension of the anti-slip protrusion 123 gradually decreases. Referring to Figure 16 and Figure 17 As shown, the anti-slip protrusion 123 can be specifically formed as a trapezoidal protrusion, which provides a better anti-slip effect.

[0075] Referring to Figure 16 As shown, an anti-slip structure can be provided on the bottom wall of the cutting edge band body 121 corresponding to the bottom of the jaw groove 112. Referring to Figure 17 As shown, an anti-slip structure can also be provided on the side wall of the cutting edge band body 121 corresponding to the groove wall of the jaw groove 112. Alternatively, anti-slip structures are provided on both the side wall and the bottom wall of the cutting edge band body 121. In addition, when an anti-slip structure is provided on the side wall of the cutting edge band body 121, the anti-slip structure can be provided on both side walls of the cutting edge band body 121, or only on one of the side walls.

[0076] Embodiment 2

[0077] Referring to Figures 1 to 18 As shown, this embodiment provides a drill chuck 100, which can be, for example, a self-locking drill chuck or a manually locked drill chuck.

[0078] The drill chuck 100 of this embodiment includes a drill body 2. A clamping jaw inclined hole 21 is provided on the drill body 2. There are multiple clamping jaw inclined holes 21, and the multiple clamping jaw inclined holes 21 are circumferentially and evenly distributed around the axis of the drill body 2 with the axis of the drill body 2 as the center line. A clamping jaw 1 is assembled in one clamping jaw inclined hole 21. That is, multiple clamping jaws 1 enclose a clamping space.

[0079] Among them, a nut 3 is assembled on the drill body 2, and the nut 3 is in matching meshing connection with the thread 114 on the clamping jaw 1. A nut sleeve 4 is sleeved outside the nut 3, a bushing 5 is provided outside the nut sleeve 4, and a front sleeve 6 is provided outside the bushing 5. Among them, the nut 3 is connected to the nut sleeve 4, the front sleeve 6 is press-fitted with the bushing 5, and there is a driving jaw connection between the bushing 5 and the nut sleeve 4.

[0080] When the front sleeve 6 is rotated, the front sleeve 6 drives the nut 3 to rotate through the bushing 5 and the nut sleeve 4, driving the clamping jaw 1 to move back and forth in the clamping jaw inclined hole 21. The circle formed by the multiple clamping jaw cutting edges 12 becomes larger or smaller according to the forward and backward movement of the clamping jaw 1, so as to clamp drill tools with different diameters.

[0081] Since the clamping jaw cutting edge 12 is a clamping jaw cutting edge 12 with qualified hardness and other requirements, the clamping effect of the drill chuck on the drill tool is improved.

[0082] The clamping jaw 1 in this embodiment has the same structure as the clamping jaw 1 provided in the first embodiment and can bring the same or similar technical effects, which will not be elaborated one by one here. The specific features of the clamping jaw 1 and other related features can refer to the description of the first embodiment.

[0083] Embodiment Three

[0084] This embodiment provides a method for assembling the clamping jaws of a drill chuck. This method is used to assemble the clamping jaws provided in the above embodiments. This method includes:

[0085] Step 1: Cool the clamping jaw cutting edge 12 to cause the clamping jaw cutting edge 12 to contract.

[0086] Specifically, first manufacture the clamping jaw cutting edge 12 to manufacture a clamping jaw cutting edge 12 with qualified hardness and wear resistance and other requirements. Then place the clamping jaw cutting edge 12 in a cooling environment for cooling, such as putting it into a cooling box for cooling, to cause the clamping jaw cutting edge 12 to contract.

[0087] Step 2: Put the cooled clamping jaw cutting edge 12 into the clamping jaw groove 112 to achieve an interference fit with the clamping jaw groove 112 after the clamping jaw cutting edge 12 returns to its original state after cooling and contraction.

[0088] Specifically, the jaw blade belt 12 is taken out of the cooling environment. Since the jaw blade belt 12 is shrunk, the jaw blade belt 12 can smoothly enter into the jaw groove 112. After waiting for a period of time, affected by the ambient temperature of the jaw 1, the jaw blade belt 12 cools and recovers. After cooling and recovery, the jaw blade belt 12 expands and achieves an interference fit with the jaw groove 112, thereby realizing a firm combination of the jaw blade belt 12 and the jaw body 11.

[0089] Since the hardness, wear resistance, etc. of the jaw blade belt 12 placed in the jaw groove 112 meet the requirements, while improving the clamping effect, the assembly of the jaw blade belt 12 can be realized without hot working and without connecting parts such as welding agents.

[0090] Further, after step two, the method may further include:

[0091] Step three: Perform riveting treatment on the notch of the jaw groove 112 to form a convex portion 113 that bends toward the jaw blade belt 12 at the notch, and make the convex portion 113 press against the jaw blade belt 12.

[0092] Specifically, the notch can be riveted by multi-point riveting to form the above-mentioned convex portion 113, or the notch can be riveted by a riveting roller cutter 7 to form the above-mentioned convex portion 113.

[0093] The specific implementation principle and other technical features are the same as those in Embodiment 1 or Embodiment 2, and can bring the same or similar technical effects, which will not be elaborated one by one here. Specifically, reference can be made to the description of Embodiment 1 or Embodiment 2.

[0094] It should be noted that in this article, relational terms such as "first" and "second" are only used 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 term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0095] The above are only specific embodiments of the present disclosure, enabling those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to these embodiments described herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A drill chuck, characterized in that, It includes a drill body (2) and a chuck; The chuck includes a chuck body (11) and a chuck cutting edge band (12). One side of the chuck body (11) has a clamping inclined surface (111), the clamping inclined surface (111) extends obliquely relative to the axis of the chuck body (11), and a chuck groove (112) is formed on the clamping inclined surface (111); the chuck cutting edge band (12) can shrink during cooling to enter into the chuck groove (112), and is in interference fit with the chuck groove (112) after the cooling shrinkage state is restored; A chuck inclined hole (21) is provided on the drill body (2), and the chuck is located in the chuck inclined hole (21); A nut (3) is assembled on the drill body (2), and a thread (114) for mating and engaging with the nut (3) is provided on the chuck body (11), and the thread (114) is located on the side of the chuck body (11) opposite to the clamping inclined surface (111); The notch of the chuck groove (112) has a convex portion (113) that can be bent in the direction of the chuck cutting edge band (12) so as to press against the chuck cutting edge band (12) after the chuck cutting edge band (12) enters into the chuck groove (112); The chuck cutting edge band (12) includes a cutting edge band body (121) and a clamping portion (122) provided on one side of the cutting edge band body (121) facing the outside of the notch of the chuck groove (112); Anti-slip structures are provided on the side wall of the cutting edge band body (121) corresponding to the groove wall of the chuck groove (112), and on the bottom wall of the cutting edge band body (121) corresponding to the groove bottom of the chuck groove (112); The anti-slip structure includes a plurality of anti-slip protrusions (123) arranged at intervals along the surface of the cutting edge band body (121), and the anti-slip protrusions (123) protrude in a direction away from the cutting edge band body (121); After the chuck cutting edge band (12) is in interference fit with the chuck groove (112), the notch is processed to form the convex portion (113) that presses against the chuck cutting edge band (12). The notch has a plurality of riveting points (115), and by riveting the plurality of riveting points (115), at least part of the notch is bent in the direction of the chuck cutting edge band (12) to form the convex portion (113); The chuck inclined holes (21) are multiple, and the multiple chuck inclined holes (21) are evenly distributed along the circumferential direction of the drill body (2) with the axis of the drill body (2) as the center line; one chuck (1) is assembled in one chuck inclined hole (21), so that the multiple chucks (1) enclose a clamping space; A nut sleeve (4) is sleeved outside the nut (3), a bushing (5) is provided outside the nut sleeve (4), and a front sleeve (6) is provided outside the bushing (5); the nut (3) is connected to the nut sleeve (4), the front sleeve (6) is press-fitted with the bushing (5), and there is a driving claw connection between the bushing (5) and the nut sleeve (4); When the front sleeve (6) is rotated, the front sleeve (6) drives the nut (3) to rotate through the bushing (5) and the nut sleeve (4), driving the jaws (1) to move back and forth in the jaw inclined holes (21). The circle formed by the plurality of jaw cutting edges (12) becomes larger or smaller according to the forward and backward movement of the jaws (1), so that drill tools with different diameters can be clamped.

2. The drill chuck according to claim 1, characterized in that, Both sides of the groove opening of the jaw groove (112) are provided with the convex portions (113).

3. The drill chuck according to claim 1, characterized in that, In the direction away from the cutting edge body (121), the cross-sectional dimension of the anti-slip protrusion (123) gradually decreases.

4. A method for assembling the jaws of the drill chuck according to any one of claims 1 to 3, characterized in that, The method includes: Cooling the jaw cutting edge to contract the jaw cutting edge; Placing the cooled jaw cutting edge into the jaw groove so as to be in interference fit with the jaw groove after the cooling and contraction state of the jaw cutting edge is restored.

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