Screw tightening device
By combining the sleeve and spring components, the problem of screw thread damage during screw tightening is solved, achieving high-quality screw connections. The use of a robotic arm and drive mechanism ensures that the screws are tightened smoothly.
Patent Information
- Application Number
- CN202422911570.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-27
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2034-11-27
AI Technical Summary
In existing screw tightening devices, the screw threads are easily damaged when they collide with the threaded hole, resulting in a decrease in connection quality.
The design employs a combination of sleeve and spring components. The lower end of the sleeve absorbs the screw and moves it to the threaded hole via a robotic arm. The spring component acts as a buffer during collisions, reducing the impact force on the screw threads. Tightening is completed by combining a rotary drive mechanism and a lifting drive mechanism.
This effectively avoids damage to the screw threads, ensures the connection quality of the screws, and improves the reliability and accuracy of the tightening process.
Smart Images
Figure CN223603834U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screw technology field especially relates to a screw tightening device. BACKGROUND
[0002] The screw tightening device is a kind of equipment widely used in the process of mechanical manufacturing and assembly, for screwing, tightening screw, bolt and nut.In prior art, the tightening end of the bit in the screw tightening device is usually magnetic, such as cross bit and hexagonal bit, the bit will first attract the screw in the tray to the tightening end of the bit, then the screw on the tightening end of the bit is placed into the threaded hole on the workpiece by the carrying mechanism, finally the bit rotates and drops synchronously, so as to tighten the screw on the workpiece.In the process of placing the screw into the threaded hole, the thread of the screw will collide with the thread of the threaded hole, which can cause the thread of the screw to be damaged, thereby reducing the connection quality of the screw. SUMMARY
[0003] The utility model aims at at least one of the technical problems existing in prior art is solved.For this purpose, the utility model provides a screw tightening device, which can avoid the damage of the thread of the screw due to collision, and can ensure the connection quality of the screw.
[0004] According to the screw tightening device provided by the utility model, the screw can be placed into the threaded hole on the workpiece by the screw tightening device, and the thread of the screw is not damaged, so that the connection quality of the screw is ensured.
[0005] At least has the following beneficial effects:
[0006] When the screw needs to be tightened on the workpiece, the manipulator drives the mounting plate to move, so that the lower end of the sleeve can adsorb the screw on the tray. Then the manipulator continues to drive the mounting plate to move, so that the sleeve and the screw on the sleeve move above the threaded hole of the workpiece. Then the manipulator drives the mounting plate to descend, so that the sleeve and the screw on the lower end of the sleeve descend together, so that the screw on the lower end of the sleeve extends into the screw hole on the workpiece. During the extension of the screw into the screw hole, the thread of the screw will collide with the thread of the screw hole. Since the upper and lower ends of the spring member are connected with the sleeve and the mounting plate respectively, after the thread of the screw collides with the thread of the screw hole, the sleeve will start to rise and the spring member will be stretched, that is, the spring member plays a buffering role, reduces the collision force between the thread of the screw and the thread of the screw hole, effectively avoids the damage of the thread of the screw, and then can ensure the connection quality of the screw. After the sleeve puts the screw into the screw hole on the workpiece, the lifting driving mechanism drives the bit to descend, and the rotary driving mechanism drives the bit to rotate, so that the bit can drive the screw to descend and rotate, so that the screw is separated from the sleeve and is tightened in the screw hole, to complete the tightening processing of the screw.
[0007] The screw tightening device also comprises a sliding rail and a first sliding block, the sliding rail is parallel to the up-down direction, the sliding rail is arranged on the mounting plate, the first sliding block is connected with the sleeve, and the first sliding block is slidably connected on the sliding rail in the up-down direction.
[0008] The screw tightening device also comprises a guide column, a guide hole is arranged on the first sliding block, the guide column is parallel to the up-down direction, the upper end of the guide column is arranged in the guide hole, the spring member is a tension spring, the tension spring is sleeved on the guide column, and the upper and lower ends of the tension spring are connected with the first sliding block and the mounting plate respectively.
[0009] The screw tightening device also comprises a limiting block, the limiting block is connected with the mounting plate, and the limiting block can abut against the lower surface of the first sliding block.
[0010] The screw tightening device also comprises a flexible pad arranged on the limiting block, and the limiting block abuts against the lower surface of the first sliding block through the flexible pad.
[0011] The screw tightening device also comprises a second sliding block, the second sliding block is connected with the rotary driving mechanism, the output end of the rotary driving mechanism is connected with the bit, and the output end of the lifting driving mechanism is connected with the second sliding block.
[0012] According to the screw tightening device of the embodiment of the present application, the lifting driving mechanism comprises a lifting cylinder, the cylinder body of the lifting cylinder is arranged on the mounting plate, and the piston rod of the lifting cylinder is connected with the second sliding block.
[0013] According to the screw tightening device of the embodiment of the present application, the vacuum generating mechanism is used for generating negative pressure in the positioning groove, so that the screw cap can be adsorbed in the positioning groove.
[0014] According to the screw tightening device of the embodiment of the present application, the pipe joint is arranged in communication with the matching hole, and the other end of the pipe joint is in communication with the output end of the vacuum generating mechanism.
[0015] According to the screw tightening device of the embodiment of the present application, a guide chamfer is arranged between the inner side wall of the positioning groove and the lower surface of the sleeve.
[0016] The additional aspects and advantages of the present application will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0017] The present application will be further described below in combination with the drawings and embodiments, wherein:
[0018] Figure 1 It is a structural schematic view of the screw tightening device of the embodiment of the present application;
[0019] Figure 2 It is Figure 1 It is a local enlarged view of A in the middle;
[0020] Figure 3 It is a structural schematic view of the mounting plate, sleeve, lifting driving mechanism and rotating driving mechanism in the screw tightening device of the embodiment of the present application;
[0021] Figure 4 It is a side view schematic view of the mounting plate, first sliding block, sliding rail and sleeve in the screw tightening device of the embodiment of the present application;
[0022] Figure 5 It is a structural schematic view of the sleeve in the screw tightening device of the embodiment of the present application;
[0023] Figure 6 It is a local sectional view schematic view of the sleeve and the bit in the screw tightening device of the embodiment of the present application;
[0024] Reference signs:
[0025] Mounting plate 100; First slider 110; Second slider 120; Slide rail 130; Spring component 140; Limiting block 150; Guide post 160;
[0026] Sleeve 200; Positioning groove 210; Guide chamfer 211; Mating hole 220; Pipe fitting 230;
[0027] Rotary drive mechanism 300; bit 310;
[0028] Lifting drive mechanism 400;
[0029] Robotic arm 500; base 510; upper arm 520; lower arm 530; lifting drive assembly 540. Detailed Implementation
[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0031] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are 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, they should not be construed as limitations on this utility model.
[0032] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.
[0033] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.
[0034] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
[0035] refer to Figures 1 to 3The screw tightening device comprises a mounting plate 100, a sleeve 200, a spring piece 140, a mechanical hand 500, a rotary driving mechanism 300, a lifting driving mechanism 400 and a bit head 310.
[0036] The sleeve 200 is connected to the mounting plate 100 in a slidable manner along the up-down direction, the lower end of the sleeve 200 is used for adsorbing a screw, and the upper and lower ends of the spring piece 140 are connected to the sleeve 200 and the mounting plate 100 respectively. The output end of the mechanical hand 500 is connected to the mounting plate 100, the mechanical hand 500 is used for driving the mounting plate 100 to move along the front-rear direction, the left-right direction and the up-down direction, the mechanical hand 500 can drive the mounting plate 100 to descend, so that the screw on the lower end of the sleeve 200 extends into a threaded hole on a workpiece, and the spring piece 140 is stretched.
[0037] The output end of the mechanical hand 500 is also referred to as the free end of the mechanical hand 500, the mounting plate 100 is connected to the output end of the mechanical hand 500, and the rotary driving mechanism 300 and the lifting driving mechanism 400 are connected to the mounting plate 100. The mechanical hand 500 drives the mounting plate 100 to move along the front-rear direction, the left-right direction and the up-down direction, so as to drive the sleeve 200, the spring piece 140, the mechanical hand 500, the rotary driving mechanism 300, the lifting driving mechanism 400 and the bit head 310 to move along the front-rear direction, the left-right direction and the up-down direction. The sleeve 200 is connected to the mounting plate 100 in a slidable manner along the up-down direction, the lower end of the sleeve 200 is used for adsorbing a screw, and the upper and lower ends of the spring piece 140 are connected to the sleeve 200 and the mounting plate 100 respectively.
[0038] It can be understood that when the screw needs to be tightened on the workpiece, the manipulator 500 drives the mounting plate 100 to move, so that the lower end of the sleeve 200 can adsorb the screw on the tray. Then the manipulator 500 continues to drive the mounting plate 100 to move, so that the sleeve 200 and the screw on the sleeve 200 move above the threaded hole of the workpiece. Then the manipulator 500 drives the mounting plate 100 to descend, so that the sleeve 200 and the screw on the lower end of the sleeve 200 descend together, so that the screw on the lower end of the sleeve 200 extends into the screw hole on the workpiece. During the process of the screw extending into the screw hole, the thread of the screw will collide with the thread of the screw hole, and since the upper and lower ends of the spring member 140 are connected with the sleeve 200 and the mounting plate 100 respectively, after the thread of the screw collides with the thread of the screw hole, the sleeve 200 will start to rise and the spring member 140 will be stretched, that is, the spring member 140 plays a buffering role, reduces the collision force between the thread of the screw and the thread of the screw hole, effectively avoids the damage of the thread of the screw, and then can ensure the connection quality of the screw. After the sleeve 200 puts the screw into the screw hole on the workpiece, the lifting driving mechanism 400 drives the bit 310 to descend, and the rotary driving mechanism 300 drives the bit 310 to rotate, so that the bit 310 can drive the screw to descend and rotate, so that the screw is separated from the sleeve 200 and is tightened in the screw hole, to complete the tightening processing of the screw.
[0039] In the embodiment of the utility model, the manipulator 500 includes base 510, big arm 520, small arm 530 and lifting driving assembly 540, one end of big arm 520 is rotatably connected on base 510, one end of small arm 530 is rotatably connected on the other end of big arm 520, lifting driving assembly 540 is connected on the other end of small arm 530, and mounting plate 100 is connected with the output end of lifting driving assembly 540. Under the swing cooperation of big arm 520 and small arm 530, lifting driving assembly 540 and mounting plate 100 can move in horizontal direction, that is, lifting driving assembly 540 and mounting plate 100 can move in front-back direction and left-right direction. Lifting driving assembly 540 can drive mounting plate to move in up-down direction. Lifting driving assembly 540 can be screw nut driving assembly. The manipulator 500 can also be other common driving members, which will not be further described here.
[0040] Reference Figure 3 And Figure 4The screw tightening device further comprises a sliding rail 130 and a first sliding block 110, the sliding rail 130 is parallel to the up-down direction, the sliding rail 130 is arranged on the mounting plate 100, the first sliding block 110 is connected with the sleeve 200, and the first sliding block 110 is slidably connected to the sliding rail 130 in the up-down direction. It can be understood that, under the sliding cooperation of the first sliding block 110 and the sliding rail 130, the sleeve 200 can stably slide up and down. The screw tightening device further comprises a guide column 160, a guide hole is formed in the first sliding block 110, the guide column 160 is parallel to the up-down direction, the upper end of the guide column 160 is arranged in the guide hole, the spring member 140 is a tension spring, the tension spring is sleeved on the guide column 160, and the upper and lower ends of the tension spring are connected with the first sliding block 110 and the mounting plate 100 respectively. It can be understood that, the tension spring is sleeved on the guide column 160, so that the deformation of the tension spring is guided, and the swing of the tension spring in the stretching process is avoided, so that the tension spring can have better buffering effect.
[0041] Reference Figure 3 and Figure 4 The screw tightening device further comprises a limiting block 150, the limiting block 150 is connected with the mounting plate 100, and the limiting block 150 can abut against the lower surface of the first sliding block 110. It can be understood that, in the process of screw tightening, the screw gradually descends, the first sliding block 110 and the sleeve 200 start to descend relative to the mounting plate 100 under the gravity of the first sliding block 110 and the sleeve 200 and under the pulling force of the tension spring. After the sleeve 200 descends to a certain distance relative to the mounting plate 100, the first sliding block 110 can abut against the limiting block 150 on the mounting plate 100. The limiting block 150 limits the first sliding block 110 and the sleeve 200, so that the first sliding block 110 and the sleeve 200 can stay at the corresponding positions on the mounting plate 100, so that the subsequent sleeve 200 can accurately adsorb the screw on the tray. After the screw tightening is completed, the mounting plate 100 is driven to move by the mechanical hand 500, so that the first sliding block 110 and the sleeve 200 move together. Under the pulling action of the tension spring, the first sliding block 110 can abut against the limiting block 150, so that the first sliding block 110 and the sleeve 200 do not move up and down relative to the mounting plate 100 in the moving process, so that the subsequent sleeve 200 can accurately adsorb the screw on the tray.
[0042] As an embodiment of the utility model, the limiting block 150 is provided with a flexible pad, and the limiting block 150 abuts against the lower surface of the first sliding block 110 through the flexible pad. It can be understood that the flexible pad can avoid the first sliding block 110 from directly colliding with the limiting block 150, so as to avoid damage of the limiting block 150 and the first sliding block 110. In the embodiment of the utility model, the screw tightening device comprises two limiting blocks 150, both of which are arranged on the mounting plate 100 and can abut against the lower surface of the first sliding block 110.
[0043] With reference to Figure 3 , the screw tightening device further comprises a second sliding block 120, the second sliding block 120 is connected with a rotary driving mechanism 300, an output end of the rotary driving mechanism 300 is connected with a chuck 310, and an output end of a lifting driving mechanism 400 is connected with the second sliding block 120. It can be understood that the output end of the rotary driving mechanism 300 is connected with the chuck 310, so that the rotary driving mechanism 300 can drive the chuck 310 to rotate, the lifting driving mechanism 400 can drive the second sliding block 120 to move along the up-down direction on the sliding rail 130, and then the lifting driving mechanism 400 can drive the rotary driving mechanism 300 and the chuck 310 to move up and down.
[0044] As an embodiment of the utility model, the rotary driving mechanism 300 comprises a motor, and the lifting driving mechanism 400 comprises a lifting cylinder. The motor is connected with the second sliding block 120, an output shaft of the motor is connected with the chuck 310, a cylinder body of the lifting cylinder is arranged on the mounting plate 100, and a piston rod of the lifting cylinder is connected with the second sliding block 120. It can be understood that the lifting driving cylinder can drive the second sliding block 120 to move along the up-down direction, so that the motor and the chuck 310 can be lowered, and the motor drives the chuck 310 to rotate, so that the chuck 310 can drive the screw to rotate while pressing the screw, and then the screw is tightened in the screw hole.
[0045] With reference to Figure 5 And Figure 6 , the screw tightening device further comprises a vacuum generating mechanism (not shown in the figure), a matching hole 220 is formed on the sleeve 200, a positioning groove 210 is formed on the lower end of the sleeve 200, the positioning groove 210 is communicated with the matching hole 220, the chuck 310 is arranged in the matching hole 220, and the vacuum generating mechanism is used to generate negative pressure in the positioning groove 210, so that the screw cap can be adsorbed in the positioning groove 210.
[0046] It can be understood that when the screw needs to be tightened on the workpiece, the manipulator 500 drives the mounting plate 100 to move, so that the screw cap of the screw at the outfeed end of the tray extends into the positioning groove 210 on the lower end of the sleeve 200, and then the vacuum generating mechanism is started, the vacuum generating mechanism causes the positioning groove 210 to generate negative pressure, so that the screw cap of the screw is adsorbed in the positioning groove 210, and then the screw cap of the screw is fixed on the inner bottom wall of the positioning groove 210. Then the manipulator 500 continues to drive the mounting plate 100 to move, so that the sleeve 200 and the screw on the sleeve 200 move above the threaded hole of the workpiece. Then the manipulator 500 drives the mounting plate 100 to descend, so that the sleeve 200 and the screw on the lower end of the sleeve 200 descend together, and then the screw on the lower end of the sleeve 200 extends into the screw hole on the workpiece, at this time the vacuum generating mechanism is closed, so that the screw is separated from the adsorption of the lower end of the sleeve 200. Finally, the rotary drive mechanism 300 drives the bit 310 to rotate, and the lifting drive mechanism 400 drives the bit 310 to descend, so that the bit 310 can drive the screw to descend and rotate, and then the screw is separated from the sleeve 200 and tightened in the screw hole, so as to complete the tightening of the screw.
[0047] In the embodiment of the utility model, after the lifting drive mechanism 400 drives the bit 310 to descend, the tightening end of the bit 310 will pass through the lower end of the matching hole 220 and extend into the positioning groove 210, so that the tightening end of the bit 310 can press down the screw, and the screw cap of the screw can be separated from the positioning groove 210. After the screw is tightened, the lifting drive mechanism 400 drives the bit 310 to ascend, so that the tightening end of the bit 310 re-extends into the matching hole 220.
[0048] Reference Figure 2 , Figure 5 and Figure 6 , the screw tightening device further comprises a pipe joint 230, one end of the pipe joint 230 communicates with the matching hole 220, and the other end of the pipe joint 230 communicates with the output end of the vacuum generating mechanism. It can be understood that the vacuum generating mechanism communicates with the positioning groove 210 through the pipe joint 230 and the matching hole 220. After the vacuum generating mechanism is started, the positioning groove 210 will generate negative pressure, so that the screw cap of the screw is adsorbed in the positioning groove 210. In the embodiment of the utility model, the vacuum generating mechanism comprises a connecting pipe and a vacuum pump, and the vacuum pump communicates with the other end of the pipe joint 230 through the connecting pipe. The vacuum generating mechanism is a common mechanism for generating negative pressure, which will not be described further here.
[0049] Reference Figure 5 and Figure 6 , a guide chamfer 211 is arranged between the inner side wall of the positioning groove 210 and the lower surface of the sleeve 200. It can be understood that the guide chamfer 211 can abut against the screw cap, so that the screw cap can more easily enter the positioning groove 210.
[0050] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they should be considered to be within the scope of the present specification.
[0051] Of course, the present application is not limited to the above-described embodiments, and those skilled in the art can make equivalent modifications or replacements without departing from the spirit of the present application. These equivalent modifications or replacements are also included in the scope defined by the claims of the present application.
Claims
1. A screw tightening device, characterized by, The utility model relates to a kind of screwing machine, including: Mounting plate (100); Sleeve (200), the sleeve (200) is slidably connected on the mounting plate (100) along up-down direction, the lower end of the sleeve (200) is used to adsorb screw; Spring piece (140), the upper and lower ends of the spring piece (140) are connected with the sleeve (200) and the mounting plate (100) respectively; Mechanical hand (500), the output end of the mechanical hand (500) is connected with the mounting plate (100), the mechanical hand (500) is used to drive the mounting plate (100) to move along front-back direction, left-right direction and up-down direction, the mechanical hand (500) can drive the mounting plate (100) to descend, so that the screw on the lower end of the sleeve (200) extends into threaded hole on workpiece, and the spring piece (140) is stretched; Rotary drive mechanism (300), lifting drive mechanism (400) and batch head (310), the rotary drive mechanism (300) and the lifting drive mechanism (400) are both arranged on the mounting plate (100), the batch head (310) is arranged in the sleeve (200), the lifting drive mechanism (400) can drive the batch head (310) to descend, the rotary drive mechanism (300) can drive the batch head (310) to rotate, so that the batch head (310) tightens the screw on the lower end of the sleeve (200).
2. A screw tightening device according to claim 1, characterized in that: It further includes slide rail (130) and first sliding block (110), the slide rail (130) is parallel to up-down direction, the slide rail (130) is arranged on the mounting plate (100), the first sliding block (110) is connected with the sleeve (200), and the first sliding block (110) can be slidably connected on the slide rail (130) along up-down direction.
3. A screw tightening device according to claim 2, characterized in that: It further includes guide column (160), the first sliding block (110) is provided with guide hole, the guide column (160) is parallel to up-down direction, the upper end of the guide column (160) is arranged in the guide hole, the spring piece (140) is tension spring, the tension spring is sleeved on the guide column (160), and the upper and lower ends of the tension spring are connected with the first sliding block (110) and the mounting plate (100) respectively.
4. A screw tightening device according to claim 3, characterized in that: It further includes limiting block (150), the limiting block (150) is connected with the mounting plate (100), and the limiting block (150) can abut with the lower surface of the first sliding block (110).
5. A screw tightening device according to claim 4, characterized in that: Flexible pad is arranged on the limiting block (150), and the limiting block (150) abuts with the lower surface of the first sliding block (110) through the flexible pad.
6. The screw tightening device according to claim 2, characterized in that: It further includes second sliding block (120), the second sliding block (120) is connected with the rotary drive mechanism (300), the output end of the rotary drive mechanism (300) is connected with the batch head (310), and the output end of the lifting drive mechanism (400) is connected with the second sliding block (120).
7. A screw tightening device according to claim 6, characterized in that: The lifting driving mechanism (400) comprises a lifting cylinder, a cylinder body of the lifting cylinder is arranged on the mounting plate (100), and a piston rod of the lifting cylinder is connected with the second sliding block (120).
8. The screw- tightening device of claim 1, wherein: Further comprising a vacuum generating mechanism, a matching hole (220) is formed on the sleeve (200), a positioning groove (210) is formed on the lower end of the sleeve (200), the positioning groove (210) is communicated with the matching hole (220), the bit (310) is arranged in the matching hole (220), and the vacuum generating mechanism is used to generate negative pressure in the positioning groove (210) so that the screw cap can be adsorbed in the positioning groove (210).
9. A screw tightening device according to claim 8, characterized in that: Further comprising a pipe joint (230), one end of the pipe joint (230) is communicated with the matching hole (220), and the other end of the pipe joint (230) is communicated with the output end of the vacuum generating mechanism.
10. The screw tightening device of claim 8, wherein: A guide chamfer (211) is arranged between the inner side wall of the positioning groove (210) and the lower surface of the sleeve (200).