Drill chuck

Abstract

The utility model discloses a drill chuck, which belongs to the technical field of drilling tools and solves the technical problems of high cost and large jumping of an outer sleeve of the drill chuck in the prior art. The drill comprises a drill body, a nut, a nut sleeve, a clamping jaw and an outer sleeve, the nut sleeve is arranged on the peripheral side of the nut, a guide ring and a locking piece are arranged on the peripheral side of the drill body and the inner peripheral side of the nut sleeve, the locking piece is arranged on the peripheral side of the guide ring, and the guide ring is provided with a locking part connected with the locking piece in a matched mode and a positioning part matched with the outer sleeve. The locking device is simple in structure, when locking is started, the locking piece is connected with the locking part of the guide ring in a matched mode to achieve locking, meanwhile, the positioning part of the guide ring is connected with the outer sleeve in a matched mode, and jumping of the outer sleeve can be effectively reduced while positioning is conducted; the functions of locking, positioning and the like are realized through the matching of the guide ring and internal parts of the drill chuck, the structure of the drill chuck is simplified, the number of parts is reduced, and the production cost is effectively reduced.

Description

Technical Field

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

[0002] The drill chuck is one of the important accessories for drilling in the power tool industry and 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 drilling tools.

[0003] The existing drill chuck is generally composed of a drill body, a jacket, a nut, a clamping jaw, a steel pad and other structures, and a special positioning and locking component is also arranged inside the drill chuck. Not only is the structure complicated, but the overall cost of the drill chuck is also high. The positioning component is generally arranged at the front end of the jacket, and the positioning is performed by the cooperation of the components. Since the axial distance between the rear end of the jacket and the positioning component is increased, the jacket will cause a large vibration, which affects the use. Utility Model Content

[0004] The utility model provides a drill chuck in view of the technical problems of high cost and large outer shell jump of the drill chuck in the prior art.

[0005] In order to solve the above-mentioned technical problems, the utility model includes a drill body, a nut, a nut sleeve, a clamping claw, and a sleeve. The nut sleeve is arranged on the outer peripheral side of the nut. A guide ring and a locking piece are arranged on the outer peripheral side of the drill body and the inner peripheral side of the nut sleeve. The locking piece is arranged on the outer peripheral side of the guide ring. The guide ring is provided with a locking part that is adapted to be connected to the locking piece and a positioning part that cooperates with the sleeve.

[0006] Preferably, the positioning portion is an outer circular protrusion provided on the guide ring, and the outer circular protrusion abuts against the inner circumference of the outer sleeve.

[0007] Preferably, in the axial direction, the outer circular protrusion is arranged at the rear end portion of the guide ring, and the outer circular protrusion is the portion where the radial dimension of the guide ring is the largest.

[0008] Preferably, the locking portion is a ratchet portion arranged on the guide ring, the ratchet portion is arranged along the circumference of the guide ring, and the locking piece is arranged on the outer peripheral side of the ratchet portion and is meshed with the ratchet.

[0009] Preferably, in the axial direction, a bearing is provided between the front end face of the guide ring and the rear end face of the nut, and the front end face of the guide ring abuts against the rear end face of the bearing.

[0010] Preferably, the guide ring includes a first outer circular portion and a second outer circular portion, the radial dimension of the first outer circular portion is smaller than the radial dimension of the second outer circular portion, the first outer circular portion is arranged close to the front end of the outer sleeve, and the second outer circular portion is arranged close to the rear end of the outer sleeve, the positioning portion is arranged at the rear end portion of the second outer circular portion, and the locking portion is arranged at the front end portion of the first outer circular portion.

[0011] Preferably, a bushing is provided between the outer circumference of the nut sleeve and the inner circumference of the outer sleeve, the bushing and the outer sleeve move synchronously, a rear inner hole is provided at the rear end of the bushing, and the outer circumference of the locking piece passes through the nut sleeve and cooperates with the rear inner hole of the bushing.

[0012] Preferably, the guide ring is a circular "convex" structure, the guide ring is a centrally symmetrical structure, and the guide ring is coaxially arranged with the drill body.

[0013] Preferably, the locking member is a locking spring, which moves synchronously with the nut sleeve, and the nut sleeve and the locking spring are driven to rotate by rotating the outer sleeve. An inwardly bent pawl is provided on the locking spring, and the pawl is meshed and connected with the locking part.

[0014] Preferably, the locking spring is a sheet-like arc-shaped spring structure with a notch. The locking spring is fixedly arranged inside the nut sleeve and is detachably connected to the nut sleeve. The locking spring is provided with a spring protrusion that matches the locking hole on the nut sleeve.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The utility model has a simple structure. By providing a guide ring and a locking piece on the outer peripheral side of the drill body and the inner peripheral side of the nut sleeve, when the outer sleeve drives the nut sleeve to rotate, the locking piece inside can be driven to rotate, so that when the locking is started, the locking piece is adapted to be connected with the locking part of the guide ring to achieve locking; at the same time, the positioning part of the guide ring is matched with the outer sleeve, which can effectively reduce the outer sleeve jump while positioning. The utility model realizes locking, positioning and other functions by matching the guide ring with the internal parts of the drill chuck, simplifies the structure of the drill chuck, reduces the number of parts, and effectively reduces the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 This is a schematic diagram of the axial cross-section structure of the drill chuck of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the guide ring of the utility model;

[0020] Figure 3 This is a schematic diagram of the main structure of the guide ring of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the locking spring of the utility model;

[0022] Figure 5 This is a schematic diagram of the connection relationship between the locking spring piece, the nut sleeve and the bushing of the utility model;

[0023] Figure 6 It is a schematic diagram of the exploded structure of the drill chuck parts of the utility model.

[0024] Explanation of symbols in the figure:

[0025] 1. Drill body; 2. Nut; 3. Nut sleeve; 31. Locking hole; 4. Clamping claw; 5. Outer sleeve; 6. Guide ring; 61. Locking part; 611. Ratchet part; 62. Positioning part; 621. Outer circle protrusion; 63. First outer circle part; 64. Second outer circle part; 65. Front end face; 7. Locking piece; 71. Locking spring; 711. Ratchet; 712. Spring protrusion; 8. Bushing; 81. Rear inner hole; 9. Front cover; 10. Bearing; 11. Circlip. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with 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.

[0027] See also Figure 1 , Figure 2 A drill chuck provided by an embodiment of the utility model includes a drill body 1, a nut 2, a nut sleeve 3, a clamping jaw 4, and an outer sleeve 5. The nut sleeve 3 is arranged on the outer peripheral side of the nut 2, and a guide ring 6 and a locking piece 7 are arranged on the outer peripheral side of the drill body 1 and the inner peripheral side of the nut sleeve 3. The locking piece 7 is arranged on the outer peripheral side of the guide ring 6, and a locking portion 61 adapted to be connected with the locking piece 7 and a positioning portion 62 matched with the outer sleeve 5 are provided on the guide ring 6.

[0028] The utility model has a simple structure. A guide ring 6 and a locking member 7 are provided on the outer circumference of the drill body 1 and the inner circumference of the nut sleeve 3. When the outer sleeve 5 drives the nut sleeve 3 to rotate, the locking member 7 inside can be driven to rotate. Therefore, when the locking is started, the locking member 7 is adapted to be connected with the locking portion 61 of the guide ring 6 to achieve locking. At the same time, the positioning portion 62 of the guide ring 6 is matched with the outer sleeve 5, which can effectively reduce the jumping of the outer sleeve 5 while positioning. The utility model realizes locking, positioning and other functions by matching the guide ring 6 with the internal components of the drill chuck, simplifies the structure of the drill chuck, reduces the number of parts, and effectively reduces the production cost.

[0029] like Figure 3As shown, in this embodiment, the positioning portion 62 is an outer circular protrusion 621 arranged on the guide ring 6, and the outer circular protrusion 621 abuts against the inner circumference of the outer sleeve 5; the locking portion 61 is a ratchet portion 611 arranged on the guide ring 6, and the ratchet portion 611 is arranged along the circumference of the guide ring 6, and the locking member 7 is arranged on the outer circumference of the ratchet portion 611 and is meshed with the ratchet portion 611.

[0030] Specifically, Figure 2 , Figure 3 As shown, the guide ring 6 is an annular "convex" one-piece molded structure, and the guide ring 6 includes a first outer circular portion 63 and a second outer circular portion 64 arranged in sequence from the top. The cross-sections of the first outer circular portion 63 and the second outer circular portion 64 are both circular, and the radial dimension of the first outer circular portion 63 is smaller than the radial dimension of the second outer circular portion 64. The first outer circular portion 63 and the second outer circular portion 64 are arranged parallel to each other, and the middle connecting ends of the two are arranged perpendicular to the first outer circular portion 63 and the second outer circular portion 64.

[0031] In this embodiment, Figure 1 As shown, the guide ring 6 is arranged on the outer circumference of the drill body 1, and the inner circumference of the first outer circumferential portion 63 of the guide ring 6 is in contact with the outer circumference of the drill body 1, a gap is provided between the inner circumference of the second outer circumferential portion 64 of the guide ring 6 and the outer circumference of the drill body 1, the outer circumference of the first outer circumferential portion 63 of the guide ring 6 is gap-fitted with the inner circumference of the nut sleeve 3, and the outer circumference of the second outer circumferential portion 64 of the guide ring 6 is arranged on the inner side of the outer sleeve 5 and a gap is provided with the inner circumference of the rear end of the outer sleeve 5.

[0032] Furthermore, in the axial direction of the drill body 1, the first outer circumferential portion 63 is arranged near the front end of the outer sleeve 5, and the second outer circumferential portion 64 is arranged near the rear end of the outer sleeve 5. The ratchet portion 611 is arranged at the front end of the first outer circumferential portion 63, and the outer circumferential protrusion 621 is arranged at the rear end of the second outer circumferential portion 64. The ratchet portion 611 is composed of ratchets uniformly arranged along the outer circumference of the first outer circumferential portion 63. The ratchet portion 611 plays the role of a ratchet. The ratchet portion 611 is connected with the locking member 7. When the drill chuck is locked and started, the locking member 7 is meshed with the ratchet portion 611 of the guide ring 6 to achieve locking.

[0033] The outer circular protrusion 621 is a protrusion structure arranged along the outer peripheral side of the end of the second outer circular portion 64. The cross-section of the outer circular protrusion 621 is a circular structure and the radial dimension of the outer circular protrusion 621 is larger than the radial dimension of the second outer circular portion 64. The outer circular protrusion 621 is the largest radial dimension on the guide ring 6. The outer circular protrusion 621 abuts against the outer sleeve 5 to play a role in positioning the outer sleeve 5. In addition, the utility model arranges the positioning structure at the rear end of the outer sleeve 5, which improves the defect of the prior art that the outer sleeve and the front periphery of the positioning component are provided with a gap adjustment, which can significantly reduce the value of the outer sleeve 5 jump and reduce the outer sleeve 5 jump.

[0034] Furthermore, if Figure 3 As shown, in this embodiment, the guide ring 6 is a centrally symmetrical structure, the guide ring 6 is coaxially arranged with the drill body 1, and the guide ring 6 has a simple structure and is easy to process.

[0035] like Figure 1 , Figure 4 As shown, in this embodiment, the locking member 7 is a locking spring 71, which moves synchronously with the nut sleeve 3, and the nut sleeve 3 and the locking spring 71 are driven to rotate by rotating the outer sleeve 5. A pawl 711 bent inward is provided on the locking spring 71, and the pawl 711 is meshed and connected with the ratchet portion 611 of the guide ring 6 to realize the locking function.

[0036] Specifically, Figure 4 , Figure 5 As shown, the locking spring piece 71 is a sheet-like arc-shaped spring piece structure with a notch, and the pawl 711 is a curved paddle structure arranged at the end of the locking spring piece 71. The width of the pawl 711 is adapted to the width of the ratchet teeth of the ratchet portion 611, so as to achieve stable engagement of the pawl 711 and the ratchet portion 611; the locking spring piece 71 is provided with a spring piece protrusion 712 adapted to the locking hole 31 on the nut sleeve 3, and the size of the locking hole 31 on the nut sleeve 3 is adapted to the size of the spring piece protrusion 712; the spring piece protrusion 712 is arranged to protrude outward, and there are two spring piece protrusions 712, and the adjacent spring piece protrusions 712 are composed of arc-shaped pieces, which face outward and cooperate with the nut sleeve 3. In the utility model, after the ratchet portion 611 on the guide ring 6 is engaged with the pawl 711 of the locking spring piece 71, the locking function is realized after the outer sleeve 5 is rotated.

[0037] Furthermore, the locking spring piece 71 is sleeved on the outer peripheral side of the ratchet portion 611 of the guide ring 6 , and the locking spring piece 71 is fixedly arranged inside the nut sleeve 3 and is detachably connected to the nut sleeve 3 .

[0038] Furthermore, as a preferred embodiment of the utility model, the specific structure of the locking spring piece 71 and the spring piece protrusion 712 can be adjusted according to actual needs, the arc-shaped or straight-shaped structure and curvature of the locking spring piece 71 can be adaptively adjusted, and multiple spring piece protrusions 712 can be provided to ensure that the structure and number of the spring piece protrusions 712 are compatible with the specific structure and number of the locking hole 31 on the nut sleeve 3.

[0039] In this embodiment, three clamping jaws 4 are provided, and the clamping jaws 4 are arranged in clamping jaw holes uniformly arranged along the circumferential direction of the drill body 1, and the clamping jaws 4 are threadedly connected with the nut 2, and the nut sleeve 3 and the nut 2 are interference fit.

[0040] Furthermore, if Figure 5 , Figure 6As shown, the drill chuck of the utility model also includes a bushing 8 and a front cover 9. The front cover 9 is arranged at the front end of the outer sleeve 5. A retaining spring 11 is arranged on the inner side of the front cover. The bushing 8 is arranged between the outer circumference of the nut sleeve 3 and the inner circumference of the outer sleeve 5. The bushing 8 and the outer sleeve 5 are relatively fixed and move synchronously, so that the bushing 8 can be driven to rotate synchronously by rotating the outer sleeve 5. A rear inner hole 81 is provided at the rear end of the bushing 8. The spring protrusion 712 of the locking spring piece 71 passes through the locking hole 31 of the nut sleeve 3 and cooperates with the rear inner hole 81 of the bushing 8. The bushing 8 is driven to rotate by rotating the outer sleeve 5, and then the nut sleeve 3 is driven to rotate, thereby driving the locking spring piece 71 inside the nut sleeve 3 to rotate. When the locking is started, the locking spring piece 71 is engaged with the ratchet portion 611 of the guide ring 6, thereby realizing the locking and anti-loosening function.

[0041] Furthermore, a bearing 10 is provided between the front end face 65 of the guide ring 6 and the rear end face of the nut 2, and the front end face 65 of the guide ring 6 abuts against the rear end face of the bearing 10. The front end face 65 of the guide ring 6 is an end face structure of the ratchet portion 611. The front end face 65 of the guide ring 6 directly abuts against the bearing 10, thereby playing the role of a steel pad component, simplifying the drill chuck structure, reducing the number of components, and realizing that one component has multiple functions.

[0042] Furthermore, the front end and the rear end described in the present invention are relative, the front end refers to the use end of the drill chuck jaw 4, and the rear end refers to the installation end of the drill chuck drill body 1.

[0043] The utility model has a simple structure. A guide ring 6 and a locking spring piece 7 are provided on the outer peripheral side of the drill body 1 and the inner peripheral side of the nut sleeve 3. When the outer sleeve 5 drives the nut sleeve 3 to rotate, the inner locking spring piece 71 can be driven to rotate, so that when the locking is started, the locking spring piece 71 is adapted to be connected with the ratchet portion 611 of the guide ring 6, and they are engaged with each other to achieve locking; at the same time, the outer cylindrical protrusion 621 of the guide ring 6 is matched with the outer sleeve 5, and the outer sleeve 5 can be effectively reduced while positioning. The utility model realizes locking, positioning and other functions by matching the guide ring 6 with the internal components of the drill chuck, simplifies the drill chuck structure, and reduces the number of parts. The guide ring 6 has the functions of positioning and locking, reducing the outer sleeve jump and steel pad, so that one component can take into account multiple functions, effectively reducing production costs.

[0044] In the description of the present invention, it should be understood that terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A drill chuck, comprising a drill body, a nut, a nut sleeve, a clamping jaw, and a sleeve, wherein the nut sleeve is arranged on the outer peripheral side of the nut, characterized in that: A guide ring and a locking piece are provided on the outer circumference of the drill body and the inner circumference of the nut sleeve. The locking piece is arranged on the outer circumference of the guide ring. The guide ring is provided with a locking part adapted to be connected with the locking piece and a positioning part matched with the outer sleeve.

2. A drill chuck according to claim 1, characterized in that: The positioning portion is an outer circular protrusion arranged on the guide ring, and the outer circular protrusion abuts against the inner circumference side of the outer sleeve.

3. A drill chuck according to claim 2, characterized in that: In the axial direction, the outer circular protrusion is arranged at the rear end of the guide ring, and the outer circular protrusion is the location where the radial dimension of the guide ring is the largest.

4. A drill chuck according to claim 1, characterized in that: The locking portion is a ratchet portion arranged on the guide ring, the ratchet portion is arranged along the circumference of the guide ring, and the locking piece is arranged on the outer circumference side of the ratchet portion and meshedly connected with the ratchet portion.

5. A drill chuck according to claim 1, characterized in that: In the axial direction, a bearing is provided between the front end surface of the guide ring and the rear end surface of the nut, and the front end surface of the guide ring abuts against the rear end surface of the bearing.

6. A drill chuck according to claim 1, characterized in that: The guide ring includes a first outer circular portion and a second outer circular portion, the radial dimension of the first outer circular portion is smaller than the radial dimension of the second outer circular portion, the first outer circular portion is arranged close to the front end of the outer sleeve, and the second outer circular portion is arranged close to the rear end of the outer sleeve, the positioning portion is arranged at the rear end portion of the second outer circular portion, and the locking portion is arranged at the front end portion of the first outer circular portion.

7. A drill chuck according to claim 6, characterized in that: A bushing is provided between the outer circumference of the nut sleeve and the inner circumference of the outer sleeve. The bushing moves synchronously with the outer sleeve. A rear inner hole is provided at the rear end of the bushing. The outer circumference of the locking piece passes through the nut sleeve and cooperates with the rear inner hole of the bushing.

8. A drill chuck according to claim 1, characterized in that: The guide ring is a circular "convex" structure, the guide ring is a centrally symmetrical structure, and the guide ring is coaxially arranged with the drill body.

9. A drill chuck according to any one of claims 1 to 8, characterized in that: The locking member is a locking spring, which moves synchronously with the nut sleeve, and the nut sleeve and the locking spring are driven to rotate by rotating the outer sleeve. An inwardly bent pawl is provided on the locking spring, and the pawl is meshed and connected with the locking part.

10. A drill chuck according to claim 9, characterized in that: The locking spring piece is a sheet-like arc-shaped spring piece structure with a notch. The locking spring piece is fixedly arranged inside the nut sleeve and is detachably connected to the nut sleeve. The locking spring piece is provided with a spring piece protrusion that is matched with the locking hole on the nut sleeve.

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