Screw locking mechanism and screw locking device
By introducing a transmission component and a guide component into the screw locking mechanism, the screwdriver bit can rotate and move axially simultaneously during the locking process, which solves the problems of inaccurate torque measurement and structural instability in traditional screw locking mechanisms, and achieves high-precision and stable screw locking effect.
Patent Information
- Application Number
- CN202520466101.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-17
AI Technical Summary
Traditional screw tightening mechanisms lack the ability to accurately measure torque, have high friction, and cannot self-adjust, which affects the tightening effect and may damage the screw or bit.
Design a screw locking mechanism that, by setting a transmission component and a guide component inside the housing, allows the screwdriver bit to rotate and move axially simultaneously during the locking process, reducing friction and improving structural stability through a rotating bearing.
It improves the torque measurement accuracy and structural stability of screw tightening, reduces friction loss, adapts to screw height or position offset, and enhances assembly accuracy and consistency.
Smart Images
Figure CN223903358U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screw locking technical field, concretely relates to a screw locking mechanism and screw locking device. BACKGROUND
[0002] In the automatic assembly production, screw locking is a common process link, and is widely used in electronic equipment, automobile manufacturing, mechanical assembly and the like. The traditional screw locking mechanism usually adopts rigid fixed structure, so that the screwdriver bit only rotates or only moves axially in the locking process, and lacks accurate locking torque measurement capability.
[0003] Because the screw locking mechanism with traditional sliding friction structure has large friction in the transmission process, the tightening torque measurement is disturbed, and it is difficult to meet the high-precision torque control requirement. In addition, the screwdriver bit cannot be adaptively adjusted according to the small height difference or position offset of the screw in the locking process, which may cause poor contact between the bit and the screw, thereby affecting the tightening effect, and even may damage the screw or the bit. SUMMARY
[0004] One object of the first aspect of the utility model is to provide a screw locking mechanism, which solves the technical problem of low torque measurement accuracy of the screw locking mechanism in the prior art.
[0005] Another object of the first aspect of the utility model is to improve the structural stability of the screw locking mechanism.
[0006] The object of the second aspect of the utility model is to provide a screw locking device comprising the screw locking mechanism.
[0007] According to the object of the first aspect of the utility model, the utility model provides a screw locking mechanism, comprising:
[0008] The screw gun comprises a connecting piece;
[0009] The shell is connected with the screw gun, and the shell comprises an installation cavity extending in the axial direction and a first opening and a second opening respectively located at both ends of the installation cavity;
[0010] The transmission assembly is arranged in the installation cavity, and the transmission assembly comprises a rotating sleeve movably connected with the shell, and the rotating sleeve comprises a connecting part located at the first opening and connected with the connecting piece;
[0011] A guide assembly is partially located in the rotating sleeve, the guide assembly comprises a guide rail extending axially along the rotating sleeve and an elastic member located between the guide rail and the connecting portion, the guide rail is arranged in fixed connection with the rotating sleeve in the radial direction and in relative displacement in the axial direction, one end of the guide rail away from the elastic member is provided with a screwdriver bit and penetrates the second opening, and the elastic member is arranged to be compressed under stress when the screw gun drives the shell and the transmission assembly to move downward, so that when the screwdriver bit abuts against the screw to be locked, the screw gun drives the rotating sleeve to rotate to drive the guide rail and the screwdriver bit to rotate, and the elastic member drives the guide rail and the screwdriver bit to move towards the screw to be locked.
[0012] Optionally, the screw locking mechanism further comprises:
[0013] A plurality of rotating bearings are arranged in the mounting cavity, and each rotating bearing is arranged to be sleeved on the circumferential side of the rotating sleeve and fixedly connected with the inner wall of the shell.
[0014] Optionally, the screw locking mechanism further comprises:
[0015] A fixed plate is located between the shell and the screw gun, the fixed plate has a through hole arranged corresponding to the first opening, and the fixed plate is fixedly connected with the screw gun and the shell respectively.
[0016] Optionally, the transmission assembly further comprises:
[0017] A sliding block is fixedly connected to the inner wall of the rotating sleeve, and the sliding block further comprises a sliding groove matched with the guide rail.
[0018] Optionally, the guide rail comprises:
[0019] A partition plate extends along the radial direction of the rotating sleeve, one side of the partition plate is arranged in abutment with the elastic member;
[0020] A sliding rail penetrates the sliding groove of the sliding block, and one end of the sliding rail is connected to one side of the partition plate away from the elastic member.
[0021] Optionally, the guide rail further comprises:
[0022] A mounting portion is located at one end of the sliding rail away from the partition plate, and the mounting portion is used for fixedly connecting the screwdriver bit.
[0023] Optionally, the screwdriver bit comprises a limiting groove, and the mounting portion further comprises:
[0024] A limiting protrusion is matched with the limiting groove to fixedly connect the mounting portion and the screwdriver bit.
[0025] Optionally, the elastic member is a spring.
[0026] According to the second aspect of the utility model, the utility model also provides a screw locking device, including the screw locking mechanism of any one of preceding description, the screw locking device further includes:
[0027] The mechanical arm is fixedly connected with the screw locking mechanism.
[0028] The utility model discloses a transmission assembly fixedly connected with screw gun is arranged in the casing, and the rotating sleeve is arranged in the casing and is arranged along the axial extension guide assembly, and the rotating sleeve of transmission assembly and the guide rail of guide assembly are radially fixedly connected, and axially opposite slide, to make screw gun drive the guide rail drive screwdriver bit rotation when rotating sleeve is rotated by connecting piece, and rotating sleeve is set up and is connected with guide rail by elastic member, to compress elastic member when screw gun drives casing and rotating sleeve and moves down, and the elastic member under compression further drives guide rail and moves to the direction of the screw to be locked, to make screw gun drive screwdriver bit and move to the direction of the screw to be locked simultaneously occur rotation and axial movement in the transmission assembly and guide assembly, to make screwdriver bit occur rotation and axial movement simultaneously in the process of locking screw and roll friction, reduce the friction force generated by single axial movement, reduce the torsional force loss of screw gun in the transmission process, improve the torsional force measurement accuracy in the screw locking process.
[0029] Further, the utility model discloses a plurality of rotating bearings are arranged between rotating sleeve and casing, to make screw gun drive rotating sleeve and rotate along the extension direction of rotating bearing relative to casing when rotating sleeve is rotated by connecting piece, and the setting of rotating bearing can guarantee the rotation stability of rotating sleeve, and further improve the structural stability of screw locking mechanism.
[0030] The above description is only the summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and can be implemented according to the content of the specification, the following preferred embodiments of the utility model are described in detail with the drawings. BRIEF DESCRIPTION OF DRAWINGS
[0031] Some specific embodiments of the utility model will be described in detail hereinafter with reference to the drawings in an exemplary but not restrictive manner. The same reference signs in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:
[0032] Figure 1 It is the schematic structural drawing of screw locking mechanism according to one embodiment of the utility model;
[0033] Figure 2is a schematic sectional view of a screw locking mechanism according to an embodiment of the present application;
[0034] Figure 3 is a schematic installation view of a guide rail and a sliding block according to an embodiment of the present application;
[0035] Figure 4 is a schematic structural view of a screwdriver bit according to an embodiment of the present application;
[0036] Figure 5 is a schematic structural view of a screw locking device according to an embodiment of the present application.
[0037] Reference signs:
[0038] 100 - screw locking mechanism, 10 - screw gun, 11 - connecting piece, 20 - shell, 21 - installation cavity, 30 - transmission assembly, 31 - rotating sleeve, 311 - connecting part, 32 - sliding block, 40 - guide assembly, 41 - guide rail, 411 - partition plate, 412 - sliding rail, 413 - installation part, 414 - limiting protrusion, 42 - elastic piece, 50 - screwdriver bit, 51 - limiting groove, 60 - rotating bearing, 70 - fixed plate, 71 - through hole, 200 - screw locking device, 210 - mechanical arm. DETAILED DESCRIPTION
[0039] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.
[0040] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below in conjunction with the drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0041] The terms "comprising" and "having" and any variations thereof in the present application are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.
[0042] Reference to "an embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a common set of embodiments, although they can. Those skilled in the art will appreciate that the embodiments described herein can be combined with other embodiments in various ways.
[0043] Figure 1 is a schematic structural view of a screw locking mechanism according to an embodiment of the present application, Figure 2 is a schematic sectional view of a screw locking mechanism according to an embodiment of the present application, Figure 3 is a schematic installation view of a guide rail and a sliding block according to an embodiment of the present application, Figure 4 is a schematic structural view of a screw driver according to an embodiment of the present application, Figure 5 is a schematic structural view of a screw locking device according to an embodiment of the present application.
[0044] As shown in Figure 2 , the present application provides a screw locking mechanism 100 (refer to Figure 1 ), which is used for locking a screw to be tightened which has been installed on a screw or a bolt. The screw locking mechanism 100 comprises a screw gun 10, a housing 20, a transmission assembly 30 and a guide assembly 40. The screw gun 10 comprises a connecting piece 11. The housing 20 is arranged to be connected with the screw gun 10. The housing 20 comprises an installation cavity 21 extending in an axial direction and a first opening and a second opening respectively located at two ends of the installation cavity 21. The transmission assembly 30 is arranged in the installation cavity 21. The transmission assembly 30 comprises a rotating sleeve 31 movably connected with the housing 20. The rotating sleeve 31 comprises a connecting part 311 located at the first opening and connected with the connecting piece 11. Part of the guide assembly 40 is located in the rotating sleeve 31. The guide assembly 40 comprises a guide rail 41 extending in the axial direction of the rotating sleeve 31 and an elastic piece 42 located between the guide rail 41 and the connecting part 311. The guide rail 41 is arranged to be fixedly connected with the rotating sleeve 31 in a radial direction and to be relatively displaced in an axial direction. An end of the guide rail 41 away from the elastic piece 42 is arranged to pass through the second opening and is provided with a screw driver 50. The elastic piece 42 is arranged to be compressed under stress when the screw gun 10 drives the housing 20 and the transmission assembly 30 to move downward, so that when the screw driver 50 abuts against the screw to be locked, the screw gun 10 drives the rotating sleeve 31 to rotate to drive the guide rail 41 and the screw driver 50 to rotate, and the elastic piece 42 drives the guide rail 41 and the screw driver 50 to move towards the screw to be locked. Here, the first opening is located at an end close to the screw gun 10, and the second opening is arranged at an end close to the screw to be locked.
[0045] In the embodiment, the transmission assembly 30 is fixedly connected with the screw gun 10 in the shell 20, the guide assembly 40 extending along the axial direction is arranged in the rotating sleeve 31, and the rotating sleeve 31 of the transmission assembly 30 is fixedly connected with the guide rail 41 of the guide assembly 40 in the radial direction and slides in the axial direction, so that the guide rail 41 drives the screwdriver bit 50 to rotate when the rotating sleeve 31 is driven to rotate by the screw gun 10 through the connecting piece 11. The rotating sleeve 31 is connected with the guide rail 41 through the elastic piece 42, so that the elastic piece 42 is compressed when the shell 20 and the rotating sleeve 31 are driven to move downward by the screw gun 10, and the compressed elastic piece 42 further drives the guide rail 41 to move toward the direction of the screw to be locked. In the process that the screw gun 10 drives the screwdriver bit 50 to move toward the direction of the screw to be locked through the transmission assembly 30 and the guide assembly 40, the screwdriver bit 50 rotates and moves axially at the same time, so that the screwdriver bit 50 rolls by rotating and moving axially at the same time in the process of locking the screw, the friction generated by single axial movement is reduced, the torque loss of the screw gun 10 in the transmission process is reduced, and the torque measurement accuracy in the screw locking process is improved.
[0046] As shown in Figure 2 In a further embodiment, the screw locking mechanism 100 further comprises a plurality of rotating bearings 60, each rotating bearing 60 is arranged in the mounting cavity 21, and each rotating bearing 60 is arranged to be sleeved on the circumferential side of the rotating sleeve 31 and fixedly connected with the inner wall of the shell 20. In the embodiment, a plurality of rotating bearings 60 are arranged between the rotating sleeve 31 and the shell 20, so that the rotating sleeve 31 rotates relative to the shell 20 along the extension direction of the rotating bearing 60 when the screw gun 10 drives the rotating sleeve 31 to rotate through the connecting piece 11. The arrangement of the rotating bearing 60 can ensure the stability of the rotation of the rotating sleeve 31, thereby improving the structural stability of the screw locking mechanism 100.
[0047] As shown in Figure 2 In a further embodiment, the screw locking mechanism 100 further comprises a fixed plate 70, the fixed plate 70 is located between the shell 20 and the screw gun 10, the fixed plate 70 has a through hole 71 corresponding to the first opening, and the fixed plate 70 is fixedly connected with the screw gun 10 and the shell 20 respectively. In the embodiment, the fixed plate 70 is arranged between the screw gun 10 and the shell 20, the screw gun 10 is mounted on one side of the fixed plate 70, and the shell 20 is mounted on the side of the fixed plate 70 away from the screw gun 10, so as to ensure that the screw gun 10 drives the shell 20, the transmission assembly 30 and the guide assembly 40 to move downward through the fixed plate 70, and ensure the consistency of the transmission of various structures.
[0048] As shown in Figure 2As shown, in a further embodiment, the transmission assembly 30 further comprises a sliding block 32 fixedly connected to the inner wall of the rotating sleeve 31, and the sliding block 32 further comprises a sliding groove matched with the guide rail 41. In this embodiment, by arranging the fixedly connected sliding block 32 in the rotating sleeve 31, the guide rail 41 is moved along the extension direction of the sliding groove of the sliding block 32 towards the screw to be tightened, that is, the arrangement of the sliding block 32 can provide a certain guidance for the movement of the guide rail 41, ensuring the stability of the movement of the screwdriver bit 50 driven by the guide rail 41 towards the screw to be tightened.
[0049] As shown in Figure 3 , in a further embodiment, the guide rail 41 comprises a partition plate 411 and a sliding rail 412, the partition plate 411 extends along the radial direction of the rotating sleeve 31 (refer to Figure 2 ), one side of the partition plate 411 is arranged to abut against the elastic member 42 (refer to Figure 2 ), and the sliding rail 412 is arranged to pass through the sliding groove of the sliding block 32, and one end of the sliding rail 412 is connected to the side of the partition plate 411 away from the elastic member 42. In this embodiment, by arranging the elastic member 42 between the connecting portion 311 of the rotating sleeve 31 and the partition plate 411 of the guide rail 41, the partition plate 411 drives the sliding rail 412 to move along the axial direction of the rotating sleeve 31 towards the screw to be tightened under the action of the elastic member 42, that is, by arranging the partition plate 411 between the elastic member 42 and the sliding rail 412, the force of the elastic member 42 can provide a buffer during the movement of the sliding rail 412, reducing the instantaneous impact force, so that the screwdriver bit 50 can automatically adapt to the height or position error of the screw to be tightened during the tightening of the screw, improving the assembly adaptability.
[0050] As shown in Figure 3 , in a further embodiment, the guide rail 41 further comprises a mounting portion 413, the mounting portion 413 is located at the end of the sliding rail 412 away from the partition plate 411, and the mounting portion 413 is used for fixedly connecting the screwdriver bit 50. In this embodiment, since the screwdriver bit 50 is fixed on the mounting portion 413 of the sliding rail 412 and realizes stable axial movement through the sliding of the guide rail 41, the displacement error caused by loosening or multi-stage transmission can be reduced, and the precision of screw tightening can be improved.
[0051] As shown in Figure 4 , in a further embodiment, the screwdriver bit 50 comprises a limiting recess 51, and the mounting portion 413 further comprises a limiting protrusion 414 (refer to Figure 2 ), the limiting protrusion 414 is matched with the limiting recess 51 to fixedly connect the mounting portion 413 and the screwdriver bit 50. In this embodiment, through the cooperation of the limiting protrusion 414 and the limiting recess 51, mechanical limiting between the mounting portion 413 and the screwdriver bit 50 can be formed, avoiding axial or radial loosening of the screwdriver bit 50 during work, and improving the stability and reliability of the tightening process.
[0052] In a further embodiment, the elastic member 42 is a spring. In this embodiment, since the spring has linear elastic characteristics, appropriate pressure can be continuously applied during the screw tightening process, so that the screwdriver bit 50 is always in contact with the screw head, ensuring stable tightening.
[0053] As shown in Figure 5 The utility model also provides a screw locking device 200, including any one of screw locking mechanism 100, screw locking device 200 still includes mechanical arm 210, mechanical arm 210 is set up with screw locking mechanism 100 fixed connection. In this embodiment, the screw locking mechanism 100 and the mechanical arm 210 are fixedly connected to form the screw locking device 200, and the screw locking mechanism 100 and the mechanical arm 210 are fixedly connected, so that the screw tightening process can be automatically executed, reducing manual intervention, greatly improving production efficiency, and being suitable for assembly line assembly operation. In addition, the mechanical arm 210 can accurately move the screw locking mechanism 100 according to the preset path, ensure that each screw can be tightened at the same angle, force and position, improve the consistency and quality of locking, and avoid human error. Moreover, the mechanical arm 210 can be programmed to control the screw locking mechanism 100 to perform locking operation at different stations and different angles, which is suitable for assembly of products with various complex structures, and improves the flexibility and compatibility of the system.
[0054] The technical features of the above-described embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.
[0055] The above-described embodiments only express several implementation manners of the utility model, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent should be subject to the appended claims.
Claims
1. A screw locking mechanism, characterized by, The screw locking mechanism comprises: a screw gun comprising a connecting member; a housing connected with the screw gun, the housing comprising an installation cavity extending in an axial direction and a first opening and a second opening respectively located at two ends of the installation cavity; a transmission assembly arranged in the installation cavity, the transmission assembly comprising a rotating sleeve movably connected with the housing, the rotating sleeve comprising a connecting portion located at the first opening and connected with the connecting member; a guide assembly partially located in the rotating sleeve, the guide assembly comprising a guide rail extending in the axial direction of the rotating sleeve and an elastic member located between the guide rail and the connecting portion, the guide rail being arranged in fixed connection with the rotating sleeve in a radial direction and capable of relative displacement in an axial direction, an end of the guide rail away from the elastic member being provided with a screwdriver bit and penetrating through the second opening, the elastic member being arranged to be compressed under stress when the screw gun drives the housing and the transmission assembly to move downward, so that when the screwdriver bit abuts against a screw to be locked, the screw gun drives the rotating sleeve to rotate to drive the guide rail and the screwdriver bit to rotate and the elastic member drives the guide rail and the screwdriver bit to move towards the screw to be locked.
2. The screw locking mechanism of claim 1, wherein, Further comprising: a plurality of rotating bearings arranged in the installation cavity, each rotating bearing being arranged to be sleeved on the circumferential side of the rotating sleeve and fixedly connected with the inner wall of the housing.
3. The screw locking mechanism of claim 2, wherein, Further comprising: a fixed plate located between the housing and the screw gun, the fixed plate having a through hole arranged corresponding to the first opening, and the fixed plate being fixedly connected with the screw gun and the housing respectively.
4. The screw locking mechanism of claim 3, wherein, The transmission assembly further comprises: a sliding block fixedly connected to the inner wall of the rotating sleeve, the sliding block further comprising a sliding groove matched with the guide rail.
5. The screw locking mechanism of claim 4, wherein, The guide rail comprises: a partition plate extending in the radial direction of the rotating sleeve, one side of the partition plate being arranged to abut against the elastic member; a sliding rail penetrating through the sliding groove of the sliding block, one end of the sliding rail being connected to the side of the partition plate away from the elastic member.
6. The screw locking mechanism of claim 5, wherein, The guide rail further comprises: an installation portion located at the end of the sliding rail away from the partition plate, the installation portion being used for fixedly connecting the screwdriver bit.
7. The screw locking mechanism of claim 6, wherein, The screwdriver bit comprises a limiting recess, and the installation portion further comprises: a limiting protrusion matched with the limiting recess to fixedly connect the installation portion and the screwdriver bit.
8. The screw locking mechanism according to any one of claims 1-7, wherein: the elastic member is a spring.
9. A screw locking device, characterized by The screw locking device comprises the screw locking mechanism according to any one of claims 1-8, and further comprises: a mechanical arm fixedly connected with the screw locking mechanism.