Drill chuck

Abstract

The utility model discloses a drill chuck, and belongs to the technical field of machining. The drill bit comprises a clamping jaw, a drill bit main body and a rotary driving body, the drill bit main body and the rotary driving body rotate relatively to close the clamping jaw, an inertia preventing piece is arranged on the periphery of the rotary driving body, and the inertia preventing piece is provided with a rotary connecting part matched with the rotary driving body and a rotary limiting part connected with the drill bit main body. The rotary drill chuck is simple in structure, the inertia preventing piece is arranged on the periphery of the rotary driving body, the end of the inertia preventing piece is connected with the drill bit body in a matched mode, the inertia force influence in the working process of the drill chuck is reduced, and the inertia force generated when the drill chuck rotates is restrained through the contact face between parts; according to the drill chuck, vibration and deviation caused by inertia can be reduced, reliable clamping of the drill chuck is guaranteed, excessive clamping or loosening of parts in the drill chuck under the action of inertia force is avoided, machining precision and safety are improved, and the cutting amount in the part machining process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of machining, and more specifically, relates to a drill chuck. Background Art

[0002] A drill chuck is a commonly used accessory in power tools, mainly used for clamping a drill bit or other tools for operation. When the drill chuck is connected to the drive tool shaft for machining work, at the moment of starting and stopping the drive tool, components such as the lead nut are likely to cause the jaws of the drill chuck to over-clamp or loosen under the action of inertia force.

[0003] In the prior art, a self-locking structure is usually provided inside the drill chuck, which can keep the drill bit stable during operation and prevent loosening or falling off. However, the process requirements for the relevant locking structure of the drill chuck are high, not only the structure is complex, but also the production cost is relatively high. How to design a drill chuck with a simple structure, low cost and good performance is one of the research directions in this field. Summary of the Utility Model

[0004] The utility model aims at the technical problems existing in the prior art and provides a drill chuck.

[0005] To solve the above technical problems, the utility model includes jaws, a drill bit body and a rotary drive body. The drill bit body rotates relative to the rotary drive body to realize the closing of the jaws. An inertia prevention member is provided on the outer periphery of the rotary drive body. The inertia prevention member includes a stop structure. The outer peripheral side of the stop structure is adaptively connected to the rotary drive body, and the end of the stop structure can be in contact connection with the drill bit body.

[0006] Preferably, the drill bit body is a drill or a component relatively fixed to the drill, and the rotary drive body is a lead nut or a front sleeve or a driving component that synchronously operates composed of a lead nut and a front sleeve.

[0007] Preferably, the inertia prevention member further includes a connecting member provided on the rotary drive body. The connecting member is provided on the outer peripheral side of the stop structure. A connection hole adapted to the connecting member is provided on the rotary drive body, and the connecting member is fixedly connected to the rotary drive body.

[0008] Preferably, the connecting member and the connection hole are of a polygonal structure and / or the connecting member and the connection hole are in interference fit with each other.

[0009] Preferably, the drill bit body includes a drill and a rear sleeve. The rear sleeve is fixedly installed on the outer peripheral side of the end of the drill. The inertia prevention member is arranged between the circumferential side of the front sleeve and the outer peripheral side of the rear sleeve.

[0010] Preferably, the stop structure is a plug screw, and the plug screw is threadedly connected to the rotary drive body.

[0011] Preferably, the inertia prevention member includes a stop structure arranged radially along the rotary drive body.

[0012] Preferably, at least one inertia prevention member is connected to the outer periphery of the rotary driving body.

[0013] Preferably, the stop structure is tightened by a control wrench. The first end of the control wrench is the operation end, and the second end of the control wrench is the end fitting with the plug screw. The control wrench drives the stop structure to rotate through the second end. The end of the second end of the control wrench is a structure in the shape of a single slot, a cross, or a polygon adapted to the plug screw.

[0014] Compared with the prior art, the present utility model has the following beneficial effects:

[0015] The structure of the present utility model is simple and the cost is relatively low. By providing an inertia prevention member on the outer periphery of the rotary driving body of the drill chuck, the inertia prevention member includes a stop structure. Since the outer peripheral side of the stop structure is adaptively connected to the rotary driving body, the end of the stop structure can be in contact connection with the drill bit body, thereby using the stop structure to reduce the influence of the inertia force during the operation of the drill chuck, and using the contact surface between components to suppress the inertia force generated when the drill chuck rotates, which helps to reduce the vibration and deviation caused by inertia, ensure the reliable clamping of the drill chuck, avoid the over-clamping or loosening of the internal parts of the drill chuck under the action of the inertia force, improve the machining accuracy and safety, and reduce the cutting amount during the machining of parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 is an axial half-sectional schematic view of an embodiment of the drill chuck of the present utility model;

[0018] Figure 2 is a schematic structural view of the plug screw of the present utility model;

[0019] Figure 3 is a front view structural schematic view of Embodiment 1 of the drill chuck of the present utility model;

[0020] Figure 4 is the present utility model Figure 3 The sectional structural schematic view of A-A in;

[0021] Figure 5 is a front view structural schematic view of Embodiment 2 of the drill chuck of the present utility model;

[0022] Figure 6 is the present utility model Figure 5 The sectional structural schematic view of B-B in;

[0023] Figure 7 This is an exploded structural schematic diagram of the second embodiment of the drill chuck of the present utility model;

[0024] Figure 8 This is a structural schematic diagram of the control wrench adopted in the embodiment of the present utility model.

[0025] Explanation of symbol markings in the figure:

[0026] 100, drill bit body; 200, rotary drive body; 300, inertia prevention member; 1, jaw; 2, plug screw; 21, plug screw installation part; 3, drill body; 4, screw nut; 5, front sleeve; 51, stop connection hole; 6, second plug screw; 7, rear sleeve; 8, insert; 9, second insert; 10, control wrench; 101, control end; 102, plug screw mating end. Detailed implementation manners

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] Please refer to Figure 1 , the present utility model provides a drill chuck, which includes a jaw 1, a drill bit body 100 and a rotary drive body 200. The drill bit body 100 rotates relative to the rotary drive body 200 to realize the closing of the jaw 1. An inertia prevention member 300 is arranged on the outer periphery of the rotary drive body 200. The inertia prevention member 300 is provided with a rotary connection part adapted to the rotary drive body 200 and a rotary limit part connected to the drill bit body 100.

[0029] The structure of the present utility model is simple and the cost is relatively low. By arranging an inertia prevention member 300 on the outer periphery of the rotary drive body 200, the end of the inertia prevention member 300 is adaptively connected to the drill bit body 100, reducing the influence of the inertial force during the operation of the drill chuck. The contact surface between components is used to suppress the inertial force generated when the drill chuck rotates, which helps to reduce the vibration and deviation caused by inertia, ensures the reliable clamping of the drill chuck, and avoids the over-clamping or loosening of the internal parts of the drill chuck under the action of the inertial force, improving the machining accuracy and safety, and reducing the cutting amount during the machining of parts.

[0030] In this embodiment, the inertia prevention member 300 includes a stop structure arranged along the radial direction of the rotary drive body 200. The outer peripheral side of the stop structure is adaptively connected to the rotary drive body 200, and the inner end of the stop structure can be in contact connection with the drill bit body 100.

[0031] Specifically, the stop structure is a plug 2 provided on the rotary drive body 200. The rotary drive body 200 is provided with a stop connection part. The plug 2 is arranged within the stop connection part, and the plug 2 can move radially within the stop connection part. The plug 2 contacts the internal drill bit body 100 through the stop connection part. By the contact between the end of the plug 2 and the drill bit body 100, the influence of inertial force during the operation of the drill chuck is reduced.

[0032] As Figure 2 shown, the plug 2 is a cylindrical structure as a whole. The outer periphery of the plug 2 is connected to the stop connection part; an installation part 21 of the plug is provided at the outer end of the plug 2. The installation part 21 is provided with an installation opening, and the shape of the installation opening is a regular hexagon structure. The plug installation opening is connected and matched with the drill chuck accessory, and the rotation and installation of the plug 2 are driven by means of the drill chuck accessory.

[0033] In this embodiment, the plug 2 and the stop connection part are connected by a threaded connection method. A connection thread is provided on the outer periphery of the plug 2, and an internal thread is provided on the inner peripheral side of the stop connection part. The plug 2 is arranged on the stop connection part of the rotary drive body 200 through thread matching. After the thread installation, the inner end of the plug 2 can contact the drill body.

[0034] Furthermore, as a preferred embodiment of the present utility model, the shape of the plug installation opening can be set to a straight shape, a cross shape or a polygon.

[0035] In this embodiment, after the drill chuck is connected to the drive tool shaft, the drill bit body 100 is relatively fixed to the drive tool shaft, and the rotary drive body 200 rotates relative to the drill bit body 100 to realize the closing of the jaws of the drill chuck. When the jaws of the drill chuck are fixed in place, by tightening the plug 2, the end of the plug 2 contacts the outer peripheral side of the drill bit body 100, thereby reducing the influence of inertial force during the operation of the drill chuck and ensuring reliable clamping of the drill chuck.

[0036] In the present utility model, there are various implementation manners for the drill bit body 100 and the rotary drive body 200. The drill bit body 100 can be a drill body or a component relatively fixed to the drill body, and the rotary drive body 200 can be a nut, a front sleeve or a driving component with synchronous action composed of a nut and a front sleeve. The specific implementation manners are as follows.

[0037] Embodiment 1

[0038] As Figure 3 、 Figure 4 shown, in this embodiment, the drill chuck is provided with a drill body 3, a nut 4 and an outer sleeve. The jaws 1 are connected to the drill body 3. The outer sleeve includes a front sleeve 5. The front sleeve 5 is a rotary sleeve arranged on the outer peripheries of the drill body 3 and the nut 4. The front sleeve 5 can drive the nut 4 to rotate relative to the drill body to realize the closing of the jaws 1 of the drill chuck.

[0039] In this embodiment, the drill bit body 100 is the provided drill body 3, the rotary drive body 200 is the provided front sleeve 5 and the lead screw nut 4, and the inertia prevention member 300 is the plug screw 2 provided on the rotary drive body 200.

[0040] Specifically, a stop connection hole 51 is provided on the outer periphery of the rear end of the front sleeve 5. The shape of the stop connection hole 51 is adapted to the outer peripheral structure of the plug screw 2. The stop connection hole 51 is arranged along the radial direction of the front sleeve 5 and is a through-hole structure penetrating the front sleeve 5, so that the inner end of the plug screw 2 can be in contact with the outer side surface of the drill body 3.

[0041] Internal threads are provided in the stop connection hole 51 of the front sleeve 5. The plug screw 2 is arranged in the stop connection hole 51 of the front sleeve 5 through threaded fit. When the drill chuck jaws 1 are fixed in place, by tightening the plug screw 2, the inner end of the plug screw 2 is brought into contact with the drill body 3, and the rotation of the drill body 3 is restricted by the contact surface of the plug screw 2, thereby reducing the influence of the inertial force during the operation of the drill chuck.

[0042] Furthermore, a second plug screw 6 is also connected to the lead screw nut 4. A through-hole is provided on the outer peripheral side of the lead screw nut 4 along its radial direction. The size of the second plug screw 6 matches the size of the through-hole on the lead screw nut 4. The second plug screw 6 is arranged in the through-hole of the lead screw nut 4. Moreover, internal threads are provided in the through-hole of the lead screw nut 4, and the second plug screw 6 is arranged on the lead screw nut 4 through threaded fit. Thus, when the second plug screw 6 is tightened inward, the inner end of the second plug screw 6 comes into contact with the drill body 3, and the anti-stop effect of the inertia prevention member is increased through the second plug screw 6.

[0043] In this embodiment, in the axial direction of the drill body, the plug screw 2 and the second plug screw 6 are respectively arranged in the upper part and the lower part, and their specific arrangement positions can be adjusted according to actual needs, not limited to a fixed orientation.

[0044] Furthermore, as a preferred embodiment, the inertia prevention member 300 further includes a connecting member provided on the rotary drive body 200. The connecting member is arranged on the outer peripheral side of the plug screw 2, and a connection hole adapted to the connecting member is provided on the rotary drive body 200.

[0045] Specifically, the connecting member is an insert provided between the rotary drive body 200 and the plug screw 2. The outer surface structure of the insert is adapted to the connection hole, and the outer peripheral side of the insert is adaptively connected to the connection hole, and the inner peripheral side of the insert is adaptively connected to the plug screw 2. The plug screw 2 can perform radial movement within the insert.

[0046] In this embodiment, the connection between the plug screw 2 and the insert can adopt a threaded connection method to realize the contact between the inner end of the plug screw 2 and the drill body 3 under the drive of the drill chuck accessory, ensuring reliable clamping of the drill chuck.

[0047] Furthermore, an insert is installed inside the front sleeve 5. The insert is arranged on the outer peripheral side of the plug screw 2, and the insert can be made of a metal material. The service life of the insert is higher than that of the front sleeve, thereby increasing the service life of the drill chuck. A second insert is installed inside the lead screw nut 4, and the second insert is arranged on the outer peripheral side of the second plug screw 6.

[0048] Furthermore, the sizes and specific structures of the insert and the second insert can be adjusted according to actual requirements, and the outer surfaces of the insert and the second insert can both be set to a polygonal structure, so that they can be reliably arranged inside the rotary drive body 200.

[0049] Embodiment 2

[0050] As Figures 5 - 7 shown, in this embodiment, the drill chuck is provided with a drill body 3, a lead screw nut 4, and an outer sleeve. The clamping jaws 1 are connected to the drill body 3. The outer sleeve includes a front sleeve 5 and a rear sleeve 7. The front sleeve 5 can drive the lead screw nut 4 to rotate relative to the drill body 3 to realize the closing of the clamping jaws 1 of the drill chuck. The rear sleeve 7 is fixedly installed on the outer peripheral side of the end of the drill body 3, and the rear sleeve 7 is arranged at the rear end of the front sleeve 5.

[0051] In this embodiment, the drill bit main body 100 is the provided drill body 3 and the rear sleeve 7, the rotary drive body 200 is the provided front sleeve 5, and the inertia prevention member 300 is the plug screw 2 arranged on the rotary drive body 200.

[0052] In this embodiment, in the axial direction of the drill body 3, the plug screw 2 and the second plug screw 6 are respectively arranged at the upper part and the lower part, and their specific installation positions can be adjusted according to actual requirements, without being limited to a fixed orientation.

[0053] Furthermore, as a preferred embodiment, the inertia prevention member 300 further includes a connecting member arranged on the front sleeve 5. The connecting member is arranged on the outer peripheral side of the plug screw 2, and the rotary drive body 200 is provided with a connection hole adapted to the connecting member.

[0054] Specifically, the connecting member is an insert 8 arranged between the rotary drive body 200 and the plug screw 2. The outer surface structure of the insert 8 is adapted to the connection hole, and the outer peripheral side of the insert 8 is adapted to be connected to the connection hole, and the inner peripheral side of the insert 8 is adapted to be connected to the plug screw 2. The plug screw 2 can perform a radial movement inside the insert 8.

[0055] In this embodiment, the connection between the plug screw 2 and the insert 8 can adopt a threaded connection manner to realize the contact between the inner end of the plug screw 2 and the drill body 3 under the drive of the drill chuck accessory, ensuring reliable clamping of the drill chuck.

[0056] Furthermore, an insert 8 and a second insert 9 are installed inside the front sleeve 5. The insert 8 and the second insert 9 are respectively arranged on the outer peripheral sides of the plug screw 2 and the second plug screw 6, and both the insert 8 and the second insert 9 can be made of a metal material. The service life of the insert 8 is higher than that of the front sleeve, thereby increasing the service life of the drill chuck.

[0057] Furthermore, the sizes and specific structures of the insert 8 and the second insert 9 can be adjusted according to actual requirements, and the outer surfaces of the insert 8 and the second insert 9 can both be set as polygonal structures, so that they can be reliably arranged in the rotary drive body 200.

[0058] Furthermore, the rear sleeve 7 provided on the drill chuck can be a rear cover or other sleeve structures provided at the end.

[0059] Furthermore, as a preferred embodiment of the present utility model, at least one anti-inertia member 300 is connected to the outer periphery of the rotary drive body 200. The number of the anti-inertia members 300 specifically provided on the rotary drive body 200, the relative setting positions, and the specific outer shape structures of each anti-inertia member 300 can be adjusted according to actual use requirements and customer customization requirements.

[0060] Optionally, a stop connection hole 51 is provided on the outer periphery of the front end of the front sleeve 5. The shape of the stop connection hole 51 is adapted to the outer peripheral structure of the plug screw 2. The stop connection hole 51 is arranged along the radial direction of the front sleeve 5 and is a through-hole structure penetrating the front sleeve 5, so that the inner end of the plug screw 2 can be in contact with the outer side surface of the drill body 3.

[0061] Internal threads are provided in the stop connection hole 51 of the front sleeve 5. The plug screw 2 is arranged in the stop connection hole 51 of the front sleeve 5 through thread fit. When the drill chuck jaws 1 are fixed in place, by tightening the plug screw 2, the inner end of the plug screw 2 is brought into contact with the drill body 3, and the rotation of the drill body 3 is restricted by the contact surface of the plug screw 2, thereby reducing the influence of inertial force during the operation of the drill chuck.

[0062] Furthermore, as shown in Figures 5 - 7 a second plug screw 6 is also provided on the front sleeve 5. The second plug screw 6 is arranged at the rear end of the front sleeve 5. A through-hole is provided on the outer peripheral side of the rear end of the front sleeve 5 along its radial direction. The size of the second plug screw 6 matches the size of the through-hole on the front sleeve 5. The second plug screw 6 is arranged in the through-hole at the rear end of the front sleeve 5. And internal threads are provided in the through-hole at the rear end of the front sleeve 5. The second plug screw 6 is arranged at the rear end of the front sleeve 5 through thread fit. Since the plug screw 2 is arranged between the inner peripheral side of the rear end of the front sleeve 5 and the outer peripheral side of the end of the rear sleeve 7, when the second plug screw 6 is screwed inwards, the inner end of the second plug screw 6 is in contact with the rear sleeve 7, and the rear sleeve 7 is relatively fixed to the drill body 3, so that the anti-stop effect of the anti-inertia member can be increased through the second plug screw 6.

[0063] As shown in Figure 8As shown in the figure, it is a schematic structural diagram of the drill chuck accessory adopted in the embodiment of the present utility model. The drill chuck accessory adopted in the embodiment is a control wrench 10. The plug screw 2 is tightened through the control wrench 10. The first end of the control wrench 10 is the control end 101, and a control knob is provided at the control end 101. The control wrench 10 is controlled through the control knob. The other end of the control wrench 10 is the plug screw mating end 102. The control wrench 10 is connected to the plug screw mounting portion 21 through the plug screw mating end 102. After connection, the plug screw 2 is driven to rotate, and then tightened inward.

[0064] Specifically, the wrench structure provided at the plug screw mating end 102 is adapted to the shape of the plug screw installation opening. The plug screw mating end 102 of the control wrench 10 is a structure in the shape of a straight line, a cross, or a polygon adapted to the plug screw.

[0065] Furthermore, the plug screw mating end 102 of the control wrench 10 can adopt a replaceable movable wrench connection structure, or a multi-wrench structure with a straight line, a cross, and a regular hexagon installed at the end as shown in Figure 8 the figure.

[0066] The present utility model provides a drill chuck with a simple structure, being green, low-cost, and excellent in performance. By arranging an inertia prevention member 300 containing a plug screw 2 on the outer periphery of the rotary driving body 200, the end of the inertia prevention member 300 is adaptively connected to the drill bit body 100. The contact surface between components is used to suppress the inertial force generated when the drill chuck rotates, ensuring reliable clamping of the drill chuck, reducing the influence of the inertial force during the working process of the drill chuck, helping to reduce vibration and deviation caused by inertia, avoiding excessive clamping or loosening of the internal parts of the drill chuck under the action of the inertial force, improving the machining accuracy and safety, and reducing the cutting amount during the machining of parts. Moreover, by arranging an insert 8 on the outer periphery of the plug screw 2 in the present utility model, the service life of the drill chuck is further extended.

[0067] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0068] Furthermore, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality of" means two or more unless otherwise specifically defined.

[0069] The above are only the preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

1. A drill chuck, comprising a clamping jaw, a drill body and a rotary driving body, wherein the drill body and the rotary driving body rotate relative to each other to close the clamping jaw, characterized in that: An inertia prevention member is arranged on the periphery of the rotary driving body. The inertia prevention member comprises a stop structure. The periphery of the stop structure is adaptively connected to the rotary driving body. The end of the stop structure can be in contact with and connected to the drill body.

2. The drill chuck according to claim 1, characterized in that: The drill bit main body is a drill body or a component relatively fixed to the drill body, and the rotary driving body is a nut or a front sleeve or a synchronous driving component composed of a nut and a front sleeve.

3. The drill chuck according to claim 2, characterized in that: The inertia preventing member further comprises a connecting member arranged on the rotating driving body, the connecting member is arranged on the outer peripheral side of the stopping structure, the rotating driving body is provided with a connecting hole matched with the connecting member, and the connecting member is fixedly connected to the rotating driving body.

4. The drill chuck according to claim 3, characterized in that: The connecting piece and the connecting hole are polygonal structures and / or the connecting piece and the connecting hole are interference fit together.

5. The drill chuck according to claim 2, characterized in that: The drill chuck comprises a front sleeve, the drill body comprises a drill body and a rear sleeve, the rear sleeve is fixedly mounted on the outer peripheral side of the end of the drill body, and the inertia preventing member is arranged between the circumferential side of the front sleeve and the outer peripheral side of the rear sleeve.

6. The drill chuck according to claim 2, characterized in that: The stopping structure is a blocking wire, and the blocking wire is threadedly connected to the rotating driving body.

7. The drill chuck according to claim 2, characterized in that: The inertia preventing member includes a stopper structure arranged along the radial direction of the rotary driving body.

8. The drill chuck according to claim 2, characterized in that: At least one inertia preventing member is connected to the outer periphery of the rotation driving body.

9. The drill chuck according to any one of claims 1 to 8, characterized in that: The stopping structure is tightened by a control wrench, the first end of the control wrench is the operating end, the second end of the control wrench is the wire blocking matching end, the control wrench drives the stopping structure to rotate via the second end, and the second end of the control wrench is a straight, cross or polygonal structure that matches the wire blocking.

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