Minimal pitch dual screw simultaneous locking mechanism

Abstract

This invention provides a dual-screw simultaneous tightening mechanism with extremely small spacing, comprising a first horizontal moving mechanism and a first vertical moving mechanism perpendicularly connected to the first horizontal moving mechanism; the actuating end of the first vertical moving mechanism is connected to a first lifting mechanism and a second lifting mechanism via a lifting connection assembly; the first lifting mechanism is connected to the second horizontal moving mechanism, on which a first electric screwdriver is mounted; the second lifting mechanism is connected to the second vertical moving mechanism, on which a second electric screwdriver is mounted; the first and second electric screwdrivers share the first horizontal moving mechanism and the first vertical moving mechanism, and are arranged side by side in the vertical direction. This invention can reduce the amount of equipment used and save on the total equipment cost of the production line.

Description

Technical Field

[0001] This utility model relates to the field of automated screw-locking technology, specifically to a mechanism for simultaneously locking two screws with extremely small spacing. Background Technology

[0002] In traditional production lines, screw fastening is mostly done manually, which is inefficient and makes it difficult to guarantee consistency and accuracy. With the increasing demands for assembly quality and precision in electronic products, especially given the intensifying competition in the 3C industry, improving fastening efficiency and accuracy has become a critical requirement.

[0003] Currently, in the assembly process of electronic products such as mobile phones, laptops, and smartwatches, it is often necessary to tighten two screws in an area with a very small gap. Due to the size limitations of the electric screwdriver, it is difficult for two electric screwdrivers to work simultaneously in such a narrow space. Usually, a single electric screwdriver is used to operate back and forth to tighten the two screws one by one, which is not only inefficient but also easily leads to a decrease in tightening consistency.

[0004] Furthermore, to achieve synchronous tightening of two screws with extremely small spacing, each electric screwdriver typically needs to be equipped with an XYZ three-axis movement mechanism to adjust its position and avoid interference. However, this solution is structurally complex, occupies a large space, and has high equipment costs, which is not conducive to production line integration and overall cost control.

[0005] Based on the above, this utility model proposes a dual-screw locking mechanism with extremely small spacing, which can effectively solve the above problems. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a mechanism for simultaneous locking of two screws with extremely small spacing. This invention can reduce the amount of equipment used and save on the total equipment cost of the production line.

[0007] This utility model provides a mechanism for simultaneously locking two screws with extremely small spacing, including a first horizontal moving mechanism and a first vertical moving mechanism perpendicularly connected to the first horizontal moving mechanism; the execution end of the first vertical moving mechanism is connected to a first lifting mechanism and a second lifting mechanism via a lifting connection assembly; the first lifting mechanism is connected to the second horizontal moving mechanism, and a first electric screwdriver is mounted on the second horizontal moving mechanism; the second lifting mechanism is connected to the second vertical moving mechanism, and a second electric screwdriver is mounted on the second vertical moving mechanism; the first electric screwdriver and the second electric screwdriver share the first horizontal moving mechanism and the first vertical moving mechanism, and the two are arranged side by side in the vertical direction.

[0008] In one embodiment, the first horizontal moving mechanism includes a first horizontal driving component, a first horizontal guiding structure, and a first horizontal moving component; the first horizontal driving component is connected to the first horizontal moving component and is used to drive the first horizontal moving component to move in the horizontal direction; the first horizontal moving component is disposed on the first horizontal guiding structure and connected to the first vertical moving mechanism to realize the horizontal guidance and positioning of the first vertical moving mechanism.

[0009] In one embodiment, the first vertical moving mechanism includes a connecting plate connected to the first horizontal moving mechanism. The connecting plate is provided with a first vertical driving component, a first vertical guiding structure, and a first vertical moving component. The first vertical driving component is connected to the first vertical moving component and is used to drive the first vertical moving component to move in the vertical direction. The first vertical moving component is disposed on the first vertical guiding structure and is connected to the lifting connecting component to realize the horizontal guidance and positioning of the lifting connecting component.

[0010] In one embodiment, the first lifting mechanism and the second lifting mechanism are each provided with a lifting drive assembly, a lifting guide structure, and a lifting moving component; the lifting drive assembly is connected to the lifting moving component and is used to drive the lifting moving component to move in the height direction; the lifting drive assembly and the lifting guide structure are fixed on the lifting connection assembly, and the lifting moving component is disposed on the lifting guide structure and connected to the second horizontal moving mechanism or the second vertical moving mechanism.

[0011] In one embodiment, the first lifting mechanism and the second lifting mechanism are arranged in a horizontal direction, and the first lifting mechanism has a predetermined displacement difference relative to the second lifting mechanism in the vertical direction, for forming a spatial clearance between the first electric screwdriver and the second electric screwdriver.

[0012] In one embodiment, a pad is connected between the lifting connection assembly and the first lifting mechanism, and the lifting connection assembly and the second lifting mechanism are directly connected so that the first electric screwdriver has a predetermined displacement difference relative to the second electric screwdriver in the vertical direction.

[0013] In one embodiment, the second horizontal moving mechanism is connected to a T-shaped bracket. The T-shaped bracket includes a first connecting part and a second connecting part that are perpendicular to each other. The first connecting part is connected to the second horizontal moving mechanism, and the second connecting part is connected to a first electric screwdriver. The first electric screwdriver is positioned towards the second electric screwdriver.

[0014] In one embodiment, the second vertical moving mechanism is connected to an L-shaped bracket, which includes a third connecting part and a fourth connecting part that are perpendicular to each other. The third connecting part is connected to the second vertical moving mechanism, and the fourth connecting part is connected to a second electric screwdriver, with the second electric screwdriver facing the direction of the first electric screwdriver.

[0015] The beneficial effects of this utility model are as follows:

[0016] The first electric screwdriver and the second electric screwdriver of this utility model share the first horizontal moving mechanism and the first vertical moving mechanism, which avoids the need to configure two sets of XYZ three-axis moving mechanisms, reduces the number of equipment and procurement costs of the whole line, and optimizes the spatial layout of the production line.

[0017] The mechanism design of this utility model fully considers the characteristics of extremely small spacing. Through spatial avoidance arrangement, pad blocks, T-shaped brackets and L-shaped bracket structures, the two electric screwdrivers are reasonably arranged in a limited space, which is suitable for product assembly scenarios with simultaneous tightening of two screws under extremely small spacing.

[0018] This invention effectively avoids the misalignment, rotation, or uneven stress caused by single-point tightening of product components by simultaneously tightening two screws at extremely small intervals, thereby improving the assembly position accuracy and stability of each component. Using dual electric screwdrivers for synchronous tightening, both screws can be tightened simultaneously in one work cycle, significantly improving the work cycle time and shortening the assembly time of a single part, making it suitable for high-cycle automated assembly lines. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A three-dimensional structural diagram of the extremely small-pitch double screw simultaneous locking mechanism provided in this embodiment of the utility model;

[0021] Figure 2 A three-dimensional structural schematic diagram of the first horizontal moving mechanism provided in an embodiment of this utility model;

[0022] Figure 3 A three-dimensional structural schematic diagram of the first vertical moving mechanism provided in an embodiment of this utility model;

[0023] Figure 4 A three-dimensional structural diagram of the lifting connection assembly provided in an embodiment of this utility model;

[0024] Figure 5 A top view of the extremely small-pitch double screw simultaneous locking mechanism provided in an embodiment of this utility model;

[0025] Figure 6 A three-dimensional structural schematic diagram of the second vertical moving mechanism provided in an embodiment of this utility model;

[0026] Figure 7 An exploded view of the force feedback mechanism connected to the L-shaped bracket provided in an embodiment of this utility model;

[0027] Figure 8 A three-dimensional structural schematic diagram of the second horizontal moving mechanism provided in an embodiment of this utility model;

[0028] Figure 9 An exploded view of the force feedback mechanism connected to the T-shaped bracket provided in an embodiment of this utility model.

[0029] Reference numerals: 1-First horizontal moving mechanism; 2-First vertical moving mechanism; 3-Lifting connecting assembly; 4-First lifting mechanism; 5-Second lifting mechanism; 6-Second horizontal moving mechanism; 7-First electric screwdriver; 8-Second vertical moving mechanism; 9-Second electric screwdriver; 10-First horizontal drive assembly; 11-First horizontal guide structure; 12-First horizontal moving component; 13-Connecting plate; 14-First vertical drive assembly; 15-First vertical guide structure; 16-First vertical moving component; 17-Lifting drive assembly; 18-Lifting guide structure; 19-Lifting moving component; 20-Padded block; 21-T-shaped bracket; 22-First connecting part; 23-Second connecting part; 24-L-shaped bracket; 25-Third connecting part; 26-Fourth connecting part; 27-Fixed bracket; 28-Force sensor; 29-Fixing component; 30-Vertical slide rail; 31-Vertical slider; 32-Limiting block. Detailed Implementation

[0030] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting the present utility model. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting the present utility model.

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0032] like Figure 1 , Figure 4 as well as Figure 5 As shown, the dual-screw locking mechanism with extremely small spacing includes a first horizontal moving mechanism 1 and a first vertical moving mechanism 2 vertically connected to the first horizontal moving mechanism 1; the execution end of the first vertical moving mechanism 2 is connected to a first lifting mechanism 4 and a second lifting mechanism 5 via a lifting connection assembly 3; the first lifting mechanism 4 is connected to a second horizontal moving mechanism 6, and a first electric screwdriver 7 is mounted on the second horizontal moving mechanism 6; the second lifting mechanism 5 is connected to a second vertical moving mechanism 8, and a second electric screwdriver 9 is mounted on the second vertical moving mechanism 8; the first electric screwdriver 7 and the second electric screwdriver 9 share the first horizontal moving mechanism 1 and the first vertical moving mechanism 2, and the two are arranged side by side in the vertical direction.

[0033] like Figure 2 As shown, the first horizontal moving mechanism 1 includes a first horizontal driving component 10, a first horizontal guiding structure 11, and a first horizontal moving component 12; the first horizontal driving component 10 is connected to the first horizontal moving component 12 and is used to drive the first horizontal moving component 12 to move in the horizontal direction; the first horizontal moving component 12 is disposed on the first horizontal guiding structure 11 and is connected to the first vertical moving mechanism 2 to realize the horizontal guidance and positioning of the first vertical moving mechanism 2.

[0034] In this embodiment, the first horizontal drive assembly 10, the first horizontal guide structure 11, and the first horizontal moving component 12 are mounted on the fixed bracket 27.

[0035] like Figure 3 As shown, the first vertical moving mechanism 2 includes a connecting plate 13 connected to the first horizontal moving mechanism 1. The connecting plate 13 is provided with a first vertical drive assembly 14, a first vertical guide structure 15, and a first vertical moving component 16. The first vertical drive assembly 14 is connected to the first vertical moving component 16 and is used to drive the first vertical moving component 16 to move in the vertical direction. The first vertical moving component 16 is disposed on the first vertical guide structure 15 and is connected to the lifting connection assembly 3 to realize the horizontal guidance and positioning of the lifting connection assembly 3.

[0036] like Figure 6 and Figure 8As shown, the first lifting mechanism 4 and the second lifting mechanism 5 are each provided with a lifting drive assembly 17, a lifting guide structure 18 and a lifting moving component 19; the lifting drive assembly 17 is connected to the lifting moving component 19 and is used to drive the lifting moving component 19 to move in the height direction; the lifting drive assembly 17 and the lifting guide structure 18 are fixed on the lifting connection assembly 3, and the lifting moving component 19 is disposed on the lifting guide structure 18 and connected to the second horizontal moving mechanism 6 or the second vertical moving mechanism 8.

[0037] In this embodiment, the first horizontal drive assembly 10, the first vertical drive assembly 14, and the lifting drive assembly 17 all include a stepper motor and a lead screw transmission structure. The output end of the stepper motor is fixedly connected to the corresponding lead screw for driving the lead screw to rotate. The first horizontal moving component 12, the first vertical moving component 16, and the lifting moving component 19 are all slider structures that are threadedly engaged with the lead screw and can move along a set direction under the drive of the lead screw. The first horizontal guide structure 11, the first vertical guide structure 15, and the lifting guide structure 18 are all guide rails. Each moving component slides and is guided on the corresponding guide rail to achieve position constraint and stable operation.

[0038] The first lifting mechanism 4 and the second lifting mechanism 5 are arranged in the horizontal direction, and the first lifting mechanism 4 has a predetermined displacement difference relative to the second lifting mechanism 5 in the vertical direction, which is used to form a space clearance between the first electric screwdriver 7 and the second electric screwdriver 9.

[0039] A pad 20 is connected between the lifting connection assembly 3 and the first lifting mechanism 4. The lifting connection assembly 3 and the second lifting mechanism 5 are directly connected so that the first electric screwdriver 7 has a predetermined displacement difference relative to the second electric screwdriver 9 in the vertical direction. The pad 20 has a set thickness so that the first electric screwdriver 7 is staggered relative to the second electric screwdriver 9 in the vertical direction to avoid interference.

[0040] The second horizontal moving mechanism 6 is connected to a T-shaped bracket 21. The T-shaped bracket 21 includes a first connecting part 22 and a second connecting part 23 that are perpendicular to each other. The first connecting part 22 is connected to the second horizontal moving mechanism 6, and the second connecting part 23 is connected to the first electric screwdriver 7, with the first electric screwdriver 7 facing the direction of the second electric screwdriver 9. The mounting position of the second connecting part 23 on the first connecting part 22 is determined according to the relative position of the first electric screwdriver 7 and the second electric screwdriver 9, so that the two are arranged side by side in the vertical direction.

[0041] The second vertical moving mechanism 8 is connected to an L-shaped bracket 24. The L-shaped bracket 24 includes a third connecting part 25 and a fourth connecting part 26 that are perpendicular to each other. The third connecting part 25 is connected to the second vertical moving mechanism 8, and the fourth connecting part 26 is connected to the second electric screwdriver 9. The second electric screwdriver 9 is arranged in the direction of the first electric screwdriver 7.

[0042] In this embodiment, by adjusting the second vertical moving mechanism 8 and the second horizontal moving mechanism 6, the relative positions between the first electric screwdriver 7 and the second electric screwdriver 9 can be finely adjusted to adapt to different tightening requirements. Driven by the first lifting mechanism 4 and the second lifting mechanism 5, the screwdrivers are automatically pressed down, thereby completing the automatic screw-locking operation.

[0043] In this embodiment, both the second horizontal moving mechanism 6 and the second vertical moving mechanism 8 are electric slides in the prior art, and their structures and working principles are well known and will not be described in detail here. The fixed ends of the second horizontal moving mechanism 6 and the second vertical moving mechanism 8 are respectively mounted on the corresponding lifting moving parts 19.

[0044] like Figure 7 and Figure 9 As shown, force feedback mechanisms are respectively provided between the second horizontal moving mechanism 6 and the T-shaped bracket 21, and between the second vertical moving mechanism 8 and the L-shaped bracket 24. Specifically, force sensors 28 are respectively installed on the top of the first connecting part 22 and the third connecting part 25; the working ends of the second horizontal moving mechanism 6 and the second vertical moving mechanism 8 are respectively connected to fixing members 29, and the fixing members 29 are provided with vertical slide rails 30, and vertical sliders 31 are slidably connected to the vertical slide rails 30; the fixing members 29 are provided with limit blocks 32 below the vertical slide rails 30, and the first connecting part 22 and the third connecting part 25 are respectively fixed on the corresponding vertical sliders 31.

[0045] During the screw-locking operation performed by the first electric screwdriver 7 and the second electric screwdriver 9, the T-shaped bracket 21 and the L-shaped bracket 24 move downwards, causing the force sensor 28 on their tops to move downwards synchronously. When the force sensor 28 contacts the top of the fixing member 29 and senses a force exceeding a preset threshold, it drives the electric screwdriver upwards to perform the screw-locking operation for the next screw.

[0046] Based on the description and drawings of this utility model, those skilled in the art can easily manufacture or use the extremely small-pitch double screw simultaneous locking mechanism of this utility model, and can produce the positive effects described in this utility model.

[0047] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0048] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A dual-screw simultaneous locking mechanism with extremely small spacing, characterized in that: It includes a first horizontal moving mechanism and a first vertical moving mechanism perpendicularly connected to the first horizontal moving mechanism; the execution end of the first vertical moving mechanism is connected to a first lifting mechanism and a second lifting mechanism via a lifting connection assembly; the first lifting mechanism is connected to the second horizontal moving mechanism, and a first electric screwdriver is mounted on the second horizontal moving mechanism; the second lifting mechanism is connected to the second vertical moving mechanism, and a second electric screwdriver is mounted on the second vertical moving mechanism; the first electric screwdriver and the second electric screwdriver share the first horizontal moving mechanism and the first vertical moving mechanism, and the two are arranged side by side in the vertical direction.

2. The simultaneous locking mechanism for two screws with minimum space according to claim 1, characterized in that: The first horizontal moving mechanism includes a first horizontal driving component, a first horizontal guiding structure, and a first horizontal moving component; the first horizontal driving component is connected to the first horizontal moving component and is used to drive the first horizontal moving component to move in the horizontal direction; the first horizontal moving component is disposed on the first horizontal guiding structure and is connected to the first vertical moving mechanism to realize the horizontal guidance and positioning of the first vertical moving mechanism.

3. The dual screw simultaneous locking mechanism of claim 1, wherein: The first vertical moving mechanism includes a connecting plate connected to the first horizontal moving mechanism. The connecting plate is provided with a first vertical driving component, a first vertical guiding structure, and a first vertical moving component. The first vertical driving component is connected to the first vertical moving component and is used to drive the first vertical moving component to move in the vertical direction. The first vertical moving component is disposed on the first vertical guiding structure and is connected to the lifting connecting component to realize the horizontal guidance and positioning of the lifting connecting component.

4. The simultaneous locking mechanism for two screws with small pitch according to claim 1, characterized in that: The first lifting mechanism and the second lifting mechanism are each provided with a lifting drive assembly, a lifting guide structure and a lifting moving component; the lifting drive assembly is connected to the lifting moving component and is used to drive the lifting moving component to move in the height direction; the lifting drive assembly and the lifting guide structure are fixed on the lifting connection assembly, and the lifting moving component is disposed on the lifting guide structure and connected to the second horizontal moving mechanism or the second vertical moving mechanism.

5. The dual screw simultaneous locking mechanism of claim 1, wherein: The first lifting mechanism and the second lifting mechanism are arranged in a horizontal direction, and the first lifting mechanism has a predetermined displacement difference relative to the second lifting mechanism in the vertical direction, which is used to create space clearance between the first electric screwdriver and the second electric screwdriver.

6. The simultaneous locking mechanism for two screws with minimum space according to claim 5, characterized in that: A pad is connected between the lifting connection assembly and the first lifting mechanism. The lifting connection assembly and the second lifting mechanism are directly connected so that the first electric screwdriver has a predetermined displacement difference relative to the second electric screwdriver in the vertical direction.

7. The simultaneous locking mechanism for two screws with small pitch according to claim 1, characterized in that: The second horizontal moving mechanism is connected to a T-shaped bracket. The T-shaped bracket includes a first connecting part and a second connecting part that are perpendicular to each other. The first connecting part is connected to the second horizontal moving mechanism, and the second connecting part is connected to the first electric screwdriver. The first electric screwdriver is oriented toward the second electric screwdriver.

8. The simultaneous locking mechanism for two screws with small pitch according to claim 1, characterized in that: The second vertical moving mechanism is connected with an L-shaped support, the L-shaped support comprises a third connecting part and a fourth connecting part which are perpendicular to each other, the third connecting part is connected with the second vertical moving mechanism, the fourth connecting part is connected with the second electric screwdriver, and the second electric screwdriver is arranged towards the first electric screwdriver.

Images