Locking mechanism and drill chuck

By using the elastic part and the drive part on the locking ring in the locking mechanism, the clamping and relaxation of the drill chuck is achieved, and the problems of complex and easy deformation of the locking member structure in the prior art are solved, and assembly accuracy and production are improved Low cost effect.

CN222176056UActive Publication Date: 2024-12-17SHANDONG WEIDA MACHINERY CO LTD
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Patent Information

Application Number
CN202323386227.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-11
Publication Date
2024-12-17
Estimated Expiration
2033-12-11

AI Technical Summary

Technical Problem

The existing lock parts with lock drill chucks are complicated due to their complex structure and easy to deform due to their heat treatment, which leads to cumbersome molding and high scrap rate, which affects the assembly accuracy.

Method used

A locking mechanism is designed, including a locking ring, a wire master and a jacket. By cooperating with the elastic part, a first drive part, a second drive part and a limiting part on the locking ring, a relative rotation between the jacket and the wire master is realized. Complete clamping and relaxation of the drill chuck and provide reliable circumferential limits.

Benefits of technology

It realizes the simplicity and reliability of the lock ring structure, reduces production costs, improves assembly accuracy, and solves the problem of easy deformation of traditional lock parts.

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Abstract

The utility model relates to the technical field of drill chucks, in particular to a locking mechanism and a drill chuck. The locking mechanism comprises a base. The locking device comprises a nut, an outer sleeve and a locking ring, the locking ring is fixedly installed on the nut and comprises an elastic part, a first driving part and a second driving part, and a first locking groove and a second locking groove which are matched with the elastic part in a clamped mode are sequentially formed in the outer sleeve in the circumferential direction. The outer sleeve is further provided with a second limiting part and a first limiting part which are in limiting fit with the first driving part and the second driving part in the circumferential direction. According to the locking mechanism, through the arrangement of the elastic part on the locking ring, when the outer sleeve is rotated, locking and unlocking actions can be completed through the first locking groove and the second locking groove respectively, meanwhile, it can be guaranteed that the outer sleeve and the nut continuously rotate relative to each other through cooperation of the first driving part, the second driving part, the first limiting part and the second limiting part; therefore, clamping and loosening of the drill chuck are completed.
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Description

Technical Field

[0001] The present application relates to the technical field of drill chucks, and in particular to a locking mechanism and a drill chuck. Background Art

[0002] The existing locking drill chucks are mostly controlled by the cooperation of metal elastic parts and plastic sleeves to lock and unlock. However, this traditional lock is generally a thin-walled part with a locking part and a sounding part integrally formed. This lock has a complicated structure, which makes the molding complicated, and is easy to deform during heat treatment, resulting in a high scrap rate, which affects its assembly accuracy. Utility Model Content

[0003] In order to solve the above technical problems, the present application provides a locking mechanism and a drill chuck.

[0004] In a first aspect, the present application provides a locking mechanism, including a nut, a jacket and a locking ring;

[0005] The lock ring is fixedly mounted on the nut, and the lock ring comprises an elastic part, a first driving part and a second driving part. The outer sleeve is provided with a first locking groove and a second locking groove which are engaged with the elastic part in sequence along the circumferential direction, and the outer sleeve is also provided with a second limiting part and a first limiting part which are engaged with the first driving part and the second driving part in the circumferential direction respectively;

[0006] When the elastic portion is located in the first locking groove, the second driving portion abuts against the first limiting portion; when the elastic portion is located in the second locking groove, the first driving portion abuts against the second limiting portion.

[0007] Optionally, the elastic portion protrudes radially along the locking ring and is used to engage with the first locking groove or the second locking groove. The elastic portion is used to undergo elastic deformation in the radial direction of the locking ring, and the first locking groove and the second locking groove are respectively formed in two recesses on the radial inner surface of the outer sleeve.

[0008] Optionally, the elastic portion is arranged on the axial end surface of the locking ring, and the elastic portion is used to undergo elastic deformation in the axial direction of the locking ring, and the first locking groove and the second locking groove are respectively formed in two recesses of the axial end surface of the outer sleeve.

[0009] Optionally, the elastic portion is in a fan-shaped shape, and both end surfaces of the elastic portion along the circumference of the locking ring are inclined structures.

[0010] Optionally, the locking ring is made of plastic or metal; the elastic part is made of plastic or metal.

[0011] Optionally, the wall thickness of the elastic part in its elastic direction is 1-4 mm.

[0012] Optionally, the locking ring and the elastic portion are integrally formed or fixedly connected.

[0013] Optionally, the locking ring and the nut are circumferentially limited in cooperation via a circumferential clamping mechanism.

[0014] Optionally, the first driving part and the second driving part are respectively located in two planes passing through the axis of the locking ring.

[0015] Optionally, the two end surfaces of the elastic portion along the circumferential direction respectively form the first driving portion and the second driving portion; the end surface of the first locking groove facing the second locking groove and the end surface of the second locking groove facing the first locking groove are both provided with guiding inclined surfaces.

[0016] In a second aspect, the present application provides a drill chuck, comprising the locking mechanism as described above.

[0017] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0018] The locking mechanism provided by the present application can realize the locking and unlocking actions of the first locking groove and the second locking groove respectively when the outer sleeve is rotated through the arrangement of the elastic part on the locking ring, and can also utilize the cooperation of the first driving part and the second driving part as well as the first limiting part and the second limiting part to ensure the relative rotation of the outer sleeve and the nut, thereby completing the clamping and loosening of the drill chuck; the locking ring can provide reliable circumferential limitation between the outer sleeve and the nut, and can also complete the relative rotation of the outer sleeve and the nut within the range of specified rotational force, and the locking ring has a simple and reliable structure, low production cost and high assembly precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] In order to more clearly illustrate the embodiments of the present application 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.

[0021] Figure 1 This is a schematic diagram of the structure of the drill chuck described in the embodiment of the present application;

[0022] Figure 2 This is a schematic structural diagram of a locking ring in a locking mechanism according to a first embodiment of the present application;

[0023] Figure 3This is a schematic structural diagram of a jacket in a locking mechanism according to a first embodiment of the present application;

[0024] Figure 4 This is a schematic structural diagram of a locking ring in a locking mechanism according to a second embodiment of the present application;

[0025] Figure 5 This is a schematic structural diagram of a jacket in a locking mechanism according to a second embodiment of the present application;

[0026] Figure 6 This is a schematic structural diagram of a locking ring in a locking mechanism according to a third embodiment of the present application;

[0027] Figure 7 This is a schematic structural diagram of the outer sleeve in the locking mechanism described in the third embodiment of the present application.

[0028] Among them, 11, nut; 12, outer sleeve; 121, first locking groove; 122, second locking groove; 123, first limiting portion; 124, second limiting portion; 13, locking ring; 131, elastic portion; 132, first driving portion; 133, second driving portion; 14, circumferential clamping mechanism. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0031] The prior art locking drill chucks are mostly controlled by the cooperation of metal elastic parts and plastic sleeves to lock and unlock. However, such traditional lock parts are mostly thin-walled parts, which are easily deformed during heat treatment, have a high scrap rate, and have complex molding that affects their assembly accuracy.

[0032] Based on this, the present embodiment provides a locking mechanism and a drill chuck. By setting the elastic part on the locking ring, when the outer sleeve is rotated, the first locking groove and the second locking groove can be used to complete the two actions of locking and unlocking. At the same time, the first driving part and the second driving part and the first limiting part and the second limiting part can cooperate to ensure that the outer sleeve and the nut rotate relative to each other, thereby completing the clamping and loosening of the drill chuck. The locking ring can provide reliable circumferential limiting between the outer sleeve and the nut, and can also complete the relative rotation of the outer sleeve and the nut within the specified rotation force range. In addition, the locking ring has a simple and reliable structure, low production cost, and high assembly precision. The following is a detailed description of it through specific embodiments:

[0033] Reference Figures 1 to 7 As shown, a locking mechanism provided by the present embodiment includes a nut 11, a sleeve 12 and a locking ring 13; the locking ring 13 is fixedly mounted on the nut 11, and the locking ring 13 includes an elastic portion 131, a first driving portion 132 and a second driving portion 133; the sleeve 12 is provided with a first locking groove 121 and a second locking groove 122 which are snap-fitted with the elastic portion 131 in sequence along the circumferential direction; the sleeve 12 is also provided with a first limiting portion 123 and a second limiting portion 124 which are respectively matched with the first driving portion 132 and the second driving portion 133 in the circumferential upper limit direction; when the elastic portion 131 is located in the second locking groove 122, the first driving portion 132 abuts against the second limiting portion 124; when the elastic portion 131 is located in the first locking groove 121, the second driving portion 133 abuts against the first limiting portion 123.

[0034] The locking mechanism provided in this embodiment can realize the locking and unlocking actions of the first locking groove 121 and the second locking groove 122 respectively when the outer sleeve 12 is rotated through the arrangement of the elastic portion 131 on the locking ring 13, and can also utilize the cooperation of the first driving portion 132 and the second driving portion 133 as well as the second limiting portion 124 and the first limiting portion 123 to ensure that the outer sleeve 12 and the nut 11 rotate relative to each other, thereby completing the clamping and loosening of the drill chuck; the locking ring 13 can provide reliable circumferential limiting between the outer sleeve 12 and the nut 11, and can also complete the relative rotation of the outer sleeve 12 and the nut 11 within the specified rotation force range, and the locking ring 13 has a simple and reliable structure, low production cost and high assembly precision.

[0035] Continue to refer to Figure 2 and Figure 3 As shown, the elastic portion 131 protrudes radially along the locking ring 13 and is used to engage with the first locking groove 121 or the second locking groove 122. The elastic portion 131 is used to undergo elastic deformation in the radial direction of the locking ring 13. The first locking groove 121 and the second locking groove 122 are respectively formed in two recesses on the radial inner surface of the outer sleeve 12.

[0036] Continue to refer to Figure 4 and Figure 5 As shown, the elastic portion 131 is arranged on the axial end surface of the lock ring 13 , and the elastic portion 131 is used to elastically deform in the axial direction of the lock ring 13 . The first locking groove 121 and the second locking groove 122 are respectively formed in two recesses of the axial end surface of the sleeve 12 .

[0037] In some embodiments, the elastic portion 131 is in a fan-shaped shape, and both end surfaces of the elastic portion 131 along the circumference of the locking ring 13 are inclined structures; in this way, when the outer sleeve 12 is rotated, it is easier for the elastic portion 131 to be squeezed and deformed from the first locking groove 121 to the second locking groove 122 or from the second locking groove 122 to the first locking groove 121.

[0038] In a further embodiment, the lock ring 13 is made of plastic, and the lock ring 13 and the elastic part 131 are integrally formed or fixedly connected; it should be noted that the lock ring 13 can be made of nylon, and can also be made of other materials such as metal, as long as the elastic locking between the outer sleeve 12 and the nut 11 can be achieved; the elastic part 131 can be made of the same plastic material as the lock ring 13, and is integrally formed with the lock ring 13; the elastic part 131 can also be made of metal and the lock ring 13 is made of plastic. The lock ring 13 and the elastic part 131 are fixedly connected, and the two can be fixed together by one or more of the following methods: interference fit, bonding, plug-in, or threaded connection. The lock ring 13 is fixedly connected to the end of the elastic part 131. Specifically, the overall structure of the elastic part 131 is approximately "Ω" shaped, and the two ends along the circumference of the lock ring 13 are respectively plugged into the grooves set on the lock ring 13 to achieve a fixed connection.

[0039] In some embodiments, the wall thickness of the elastic portion 131 in its elastic direction is 1-4 mm; this ensures that the elastic portion 131 can provide a reliable elastic locking force while ensuring its own sufficient strength, thereby extending its service life.

[0040] In a further embodiment, the locking ring 13 and the nut 11 are circumferentially limited by a circumferential clamping mechanism 14; wherein the circumferential clamping mechanism 14 may be an axial plug-in mechanism similar to the first limiting portion 123 and the first driving portion 132 to achieve circumferential locking and limiting.

[0041] In some embodiments, the first driving portion 132 and the second driving portion 133 are respectively located in planes passing through the axes of the two locking rings 13; such a configuration can form a more stable circumferential thrust when the first driving portion 132 and the second limiting portion 124 cooperate, and when the second driving portion 133 and the first limiting portion 123 cooperate; it should be understood that in further embodiments, the first limiting portion 123 and the second limiting portion 124 can also be respectively located in planes passing through the axes of the two locking rings 13.

[0042] Continue to refer to Figure 6and Figure 7 As shown, the two end surfaces of the elastic portion 131 along the circumferential direction respectively form a first driving portion 132 and a second driving portion 133; the end surface of the first locking groove 121 facing the second locking groove 122 and the end surface of the second locking groove 122 facing the first locking groove 121 are both provided with guiding inclined surfaces; through the guiding inclined surfaces on both sides, when the elastic portion 131 slides from the first locking groove 121 to the second locking groove 122 or from the second locking groove 122 to the first locking groove 121, it is ensured that the first driving portion 132 and the second driving portion 133 will not be stuck, but will be gradually elastically compressed to complete the position switching, until the second limiting portion 124 moves to the first driving portion 132 or the first limiting portion 123 moves to the position of the second driving portion 133, the nut 11 and the outer sleeve 12 cannot continue to slide relative to each other.

[0043] Continue to refer to Figures 1 to 5 As shown, the elastic portion 131, the first driving portion 132 and the second driving portion 133 can be evenly arranged in multiple groups along the circumferential direction, wherein the first limiting portion 123 and the second limiting portion 124 on the outer sleeve 12 also match the first driving portion 132 and the second driving portion 133 in quantity, thereby ensuring that a uniform circumferential force is applied to the locking ring 13 when the outer sleeve 12 is rotated.

[0044] In a second aspect, the present application provides a drill chuck, comprising the locking mechanism as described above.

[0045] The specific implementation method and implementation principle are the same as those in the above embodiment, and can bring the same or similar technical effects, which will not be described one by one here. For details, please refer to the description of the above locking mechanism embodiment.

[0046] 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 such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0047] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent 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 application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A locking mechanism, characterized in that: It comprises a nut (11), a jacket (12) and a locking ring (13); The locking ring (13) is fixedly mounted on the nut (11), and the locking ring (13) comprises an elastic portion (131), a first driving portion (132) and a second driving portion (133); the outer sleeve (12) is provided with a first locking groove (121) and a second locking groove (122) in sequence along the circumferential direction and are engaged with the elastic portion (131); the outer sleeve (12) is also provided with a second limiting portion (124) and a first limiting portion (123) respectively engaged with the first driving portion (132) and the second driving portion (133) in the circumferential direction; When the elastic portion (131) is located in the first locking groove (121), the second driving portion (133) abuts against the first limiting portion (123); when the elastic portion (131) is located in the second locking groove (122), the first driving portion (132) abuts against the second limiting portion (124).

2. The locking mechanism according to claim 1, characterized in that: The elastic portion (131) protrudes radially along the locking ring (13) and is used to engage with the first locking groove (121) or the second locking groove (122). The elastic portion (131) is used to undergo elastic deformation in the radial direction of the locking ring (13). The first locking groove (121) and the second locking groove (122) are respectively formed in two recesses on the radial inner surface of the outer sleeve (12).

3. The locking mechanism according to claim 1, characterized in that: The elastic portion (131) is arranged on the axial end surface of the locking ring (13), and the elastic portion (131) is used to undergo elastic deformation in the axial direction of the locking ring (13). The first locking groove (121) and the second locking groove (122) are respectively formed in two recessed positions on the axial end surface of the outer sleeve (12).

4. The locking mechanism according to any one of claims 1 to 3, characterized in that: The elastic portion (131) is in a fan-shaped ring shape.

5. The locking mechanism according to any one of claims 1 to 3, characterized in that: The locking ring (13) is made of plastic or metal; the elastic part (131) is made of plastic or metal.

6. The locking mechanism according to claim 5, characterized in that: The locking ring (13) and the elastic portion (131) are integrally formed or fixedly connected.

7. The locking mechanism according to claim 1, characterized in that: The lock ring (13) and the nut (11) are circumferentially limited in cooperation via a circumferential clamping mechanism (14).

8. The locking mechanism according to claim 1, characterized in that: The first driving portion (132) and the second driving portion (133) are respectively located in two planes passing through the axis of the locking ring (13).

9. The locking mechanism according to claim 1, characterized in that: The first driving portion (132) and the second driving portion (133) are respectively formed at two end surfaces of the elastic portion (131) along the circumferential direction.

10. A drill chuck, characterized in that: Comprising a locking mechanism as claimed in any one of claims 1 to 9.