An automatic tightening device for workpiece assembly

Abstract

This utility model provides an automatic tightening device for workpiece assembly, including a bracket, a first fixed frame, a second fixed frame, a drive mechanism, and a tightening mechanism. The first fixed frame is fixedly mounted on the upper end of the bracket, the drive mechanism is fixedly mounted on the first fixed frame, and the second fixed frame is fixedly mounted on the drive mechanism. The tightening mechanism includes a rotary motor and a tightening assembly. The rotary motor is fixedly mounted on the second fixed frame, and the upper end of the tightening assembly is rotatably connected to the lower end of the second fixed frame. The tightening assembly is fixedly connected to the output end of the rotary motor. The drive mechanism is used to drive the rotary motor and the tightening assembly to move up and down. The automatic tightening device of this utility model can be dynamically adjusted and can automatically tighten threaded parts with different pitches. It can also quickly adjust its position, reducing the labor intensity of workers and improving work efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of workpiece assembly technology, and in particular relates to an automatic tightening device for workpiece assembly. Background Technology

[0002] In the assembly of mechanical parts, the parts are often fastened together by threads. Therefore, tightening the parts is a key process to ensure the reliability of the connection. Currently, the common tightening method mainly relies on manual operation with simple tools or electric wrenches. However, this method is not only time-consuming and labor-intensive, but also inefficient and demanding. Therefore, improving work efficiency is particularly important. Summary of the Invention

[0003] In view of this, the present invention aims to propose an automatic tightening device for workpiece assembly, so as to solve the problems of relying on manual operation with simple tools or electric wrenches, which is time-consuming, labor-intensive, inefficient and high-intensity.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] An automatic tightening device for workpiece assembly includes a bracket, a first fixed frame, a second fixed frame, a drive mechanism, and a tightening mechanism. The first fixed frame is fixedly mounted on the upper end of the bracket, the drive mechanism is fixedly mounted on the first fixed frame, the second fixed frame is fixedly mounted on the drive mechanism, and the tightening mechanism includes a rotary motor and a tightening assembly. The rotary motor is fixedly mounted on the second fixed frame, the upper end of the tightening assembly is rotatably connected to the lower end of the second fixed frame, and the tightening assembly is fixedly connected to the output end of the rotary motor. The drive mechanism is used to drive the rotary motor and the tightening assembly to move up and down.

[0006] Furthermore, the tightening assembly includes a sleeve, a tightening wrench, a limiting component, and a detection component. The upper end of the sleeve is rotatably connected to the lower end of the second fixed frame, and the sleeve is a telescopic structure. The tightening wrench is installed at the lower end of the sleeve. A limiting component is provided between the sleeve and the second fixed frame, and a detection component is provided between the sleeve and the tightening wrench.

[0007] Furthermore, the sleeve includes a first sleeve and a second sleeve. The upper end of the first sleeve is rotatably connected to the lower end of the second fixed frame, and the upper end of the first sleeve is fixedly connected to the output end of the rotating motor. The side wall of the first sleeve is symmetrically provided with two through slots along the axial direction. The through slots are rectangular through slots. Each through slot is provided with a guide key, and the guide key can move up and down along the through slot. One end of each guide key is fixedly connected to the periphery of the second sleeve, and the periphery of the second sleeve is displaced from the inner ring of the first sleeve. A tightening wrench can be detachably installed at the lower end of the second sleeve. A compression spring is provided at the top of the inside of the first sleeve, and the lower end of the compression spring abuts against the upper end of the second sleeve.

[0008] Furthermore, the limiting component includes a movable plate and guide rods. The movable plate is rotatably arranged around the second sleeve, and a guide rod is fixedly installed on each side of the movable plate. The two guide rods are arranged parallel to each other, and the periphery of each guide rod is slidably connected to the second fixed frame.

[0009] Furthermore, the detection component includes a displacement sensor and a positioning element. The displacement sensor is fixedly installed on one side of the second fixed frame, and the positioning element is fixedly installed on one side of the movable plate, with the displacement sensor and the positioning element facing each other.

[0010] Furthermore, the first fixing frame includes a mounting frame and a fixing plate. The mounting frame is fixedly mounted on the bracket. A plurality of through holes are provided on one side of the mounting frame. The through holes are rectangular elongated holes. The through holes are used to fix the fixing plate to the mounting frame through the first bolt. The drive mechanism is fixedly mounted on the fixing plate.

[0011] Furthermore, the first fixing bracket also includes a second bolt. A second bolt is respectively provided on both sides of the mounting bracket. The outer periphery of the second bolt is threaded to the mounting bracket, and the front end of the second bolt abuts against the fixing plate. The two opposing second bolts are used to adjust and fix the relative position of the fixing plate and the mounting bracket.

[0012] Furthermore, the bracket also includes multiple clamping components, which are independently arranged along the bracket. The clamping components are fixedly installed in a fixed position, with one end of the clamping component abutting against the outer periphery of the bracket. The clamping components are used to adjust and fix the position of the bracket.

[0013] Furthermore, the clamping assembly includes a fixing block and a third bolt. The periphery of the third bolt is threadedly connected to the fixing block, and the front end of the third bolt abuts against the bracket. The fixing block is fixedly installed in a fixed position.

[0014] Compared with the prior art, the automatic tightening device of this utility model has the following advantages:

[0015] (1) The automatic tightening device for workpiece assembly described in this utility model drives a rotating motor to move toward the part through a drive mechanism, which in turn drives a tightening wrench to move toward the part. The rotating motor drives the tightening wrench to tighten the part, so that the part completes the tightening action by moving the thread from top to bottom. The tightening action can be completed automatically through the rotating motor and drive mechanism. The automatic tightening action can be dynamically adjusted for threaded parts with different pitches, which reduces the labor intensity of workers and improves work efficiency.

[0016] (2) The automatic tightening device for workpiece assembly described in this utility model, through the setting of the first fixed frame, the fixed plate can move left and right relative to the mounting frame. The two sides of the fixed plate are fixed by the second bolt. By setting the clamping component, the front and rear installation position of the fixed bracket can be adjusted. The two sides of the bracket are fixed by the third bolt, thereby adjusting the left and right and front and rear movement position of the tightening wrench relative to the workpiece. This enables the tightening wrench to be more accurately aligned with the hole position of the workpiece, achieving rapid adjustment and ensuring the quality of workpiece tightening, thus improving work efficiency. Attached Figure Description

[0017] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0018] Figure 1 This is a schematic diagram of an automatic tightening device for workpiece assembly according to an embodiment of the present utility model;

[0019] Figure 2 This is a side view schematic diagram of an automatic tightening device for workpiece assembly according to an embodiment of the present utility model.

[0020] Figure 3 This is a schematic diagram of the tightening mechanism described in an embodiment of the present invention.

[0021] Figure 4 This is a schematic cross-sectional view of the tightening mechanism described in an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the structure of the bracket and the first fixing frame described in an embodiment of the present utility model.

[0023] Figure 6 This is an exploded view of the first fixing frame described in an embodiment of the present utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Bracket; 2-First fixed bracket; 3-Second fixed bracket; 4-Drive mechanism; 5-Tightening mechanism; 6-Measuring component; 11-Clamping component; 21-Mounting bracket; 22-Fixing plate; 23-Second bolt; 51-Rotating motor; 52-Tightening component; 521-Sleeve; 522-Guide key; 523-Tightening wrench; 524-Compression spring; 525-Moving plate; 526-Guide rod. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical 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.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figure 1-6 As shown, an automatic tightening device for workpiece assembly includes a bracket 1, a first fixed frame 2, a second fixed frame 3, a drive mechanism 4, and a tightening mechanism 5. The first fixed frame 2 is fixedly installed on the upper end of the bracket 1, the drive mechanism 4 is fixedly installed on the first fixed frame 2, and the second fixed frame 3 is fixedly installed on the drive mechanism 4. The tightening mechanism 5 includes a rotary motor 51 and a tightening assembly 52. ​​The rotary motor 51 is a prior art model, DP-TXL-002. The rotary motor 51 is fixedly installed on the second fixed frame 3. The upper end of the tightening assembly 52 is rotatably connected to the lower end of the second fixed frame 3. The tightening assembly 52 is fixedly connected to the output end of the rotary motor 51. The drive mechanism 4 is used to drive the rotary motor 51 and the tightening assembly 52 to move up and down. The rotary motor 51 is used to drive the tightening assembly 52 to tighten the parts. Thus, the drive mechanism 4 drives the rotary motor 51 and the tightening assembly 52, and at the same time, the tightening assembly 52 tightens the parts, so that the parts move from top to bottom through the threads.

[0031] like Figure 2 and Figure 3 As shown, the tightening assembly 52 includes a sleeve 521, a tightening wrench 523, a limiting assembly, and a detection assembly. The upper end of the sleeve 521 is rotatably connected to the lower end of the second fixed frame 3, and the sleeve 521 is a telescopic structure. The tightening wrench 523 is installed at the lower end of the sleeve 521. A limiting assembly is provided between the sleeve 521 and the second fixed frame 3, and a detection assembly is provided between the sleeve 521 and the tightening wrench 523. The sleeve 521 includes a first sleeve and a second sleeve. The upper end of the first sleeve is rotatably connected to the lower end of the second fixed frame 3, and the upper end of the first sleeve is fixedly connected to the output end of the rotating motor 51. The side wall of the first sleeve is symmetrically provided with two through slots along the axial direction. The through slots are rectangular through slots, and a guide key 522 is provided in each through slot. The guide key 522 can move up and down along the through slot. One end of each guide key 522 is fixedly connected to the second sleeve. The outer periphery of the first sleeve is located within the inner ring of the second sleeve. A tightening wrench 523 is detachably installed at the lower end of the second sleeve. A compression spring 524 is provided at the top of the inner part of the first sleeve, and the lower end of the compression spring 524 abuts against the upper end of the second sleeve. The limiting assembly includes a moving plate 525 and a guide rod 526. The moving plate 525 is rotatably arranged around the outer periphery of the second sleeve. A guide rod 526 is fixedly installed on each side of the moving plate 525, and the two guide rods 526 are arranged parallel to each other. The outer periphery of each guide rod 526 is slidably connected to the second fixed frame 2. The detection assembly includes a displacement sensor and a positioning component. The displacement sensor is fixedly installed on one side of the second fixed frame 3, and the positioning component is fixedly installed on one side of the moving plate 525. The displacement sensor and the positioning component are arranged opposite each other. The displacement sensor is existing technology and its model is KTC2.

[0032] In implementation, the drive mechanism 4 adopts a lead screw linear module drive structure. The drive mechanism 4 includes a base, a slide, a lead screw, and a drive motor. The base is vertically fixed on the first fixed frame 2. The drive motor is fixedly installed at one end of the base. The lead screw is located inside the base, and one end of the lead screw is fixedly connected to the output end of the drive motor, while the other end is rotatably connected to the base. The two sides of the slide are slidably connected to the base, and the middle of the slide is threadedly connected to the lead screw. The second fixed frame 3 is fixedly installed on the slide. Thus, the drive motor drives the lead screw to rotate, the rotation of the lead screw drives the slide to move, which in turn drives the second fixed frame 3 to move up and down, which in turn drives the rotary motor 51 and the tightening assembly 52 to move up and down. The drive motor is existing technology, and the drive motor has the same model as the rotary motor 51, which is DP-TXL-002.

[0033] In practice, the part to be tightened is pre-installed onto the workpiece to be tightened. The workpiece is then placed below the automatic tightening device. The drive mechanism 4 drives the rotary motor 51 and tightening assembly 52 to move towards the part, which in turn drives the sleeve 521 towards the part, and then the tightening wrench 523 towards the part. When the tightening wrench 523 comes into contact with the part to be tightened, the rotary motor 51 drives the sleeve 521 to rotate, which in turn drives the tightening wrench 523 to tighten the part. Thus, the drive mechanism 4 drives the rotary motor 51 and the tightening wrench 523 to tighten the part, so that the part moves from top to bottom through the thread. After it is tightened to the end, the detection assembly 6 is set with a threshold value pre-set for the displacement sensor. When the part is tightened to the end, the drive mechanism 4 continues to move downward. At this time, the guide key 522 drives the tightening wrench 523 to push the compression spring 524 upward, which in turn causes the moving plate 525 to move along the guide rod 52. 6. Move upwards. At this time, the displacement sensor detects the displacement of the positioning part after movement. The displacement is compared with a threshold. When the displacement exceeds the threshold, it is determined that the part has been tightened to the end. At this time, the displacement sensor sends a signal and transmits it to the controller. The controller causes the rotating motor 51 and the drive mechanism 4 to stop working, and the tightening action is completed. The drive mechanism 4 is reset and lifted to the starting position, and the workpiece is transferred to the next station. The rotating motor 51 and the drive mechanism 4 can automatically complete the tightening action. At the same time, it can dynamically adjust the automatic tightening action for threaded parts with different pitches, reducing the labor intensity of workers and improving work efficiency. The limit component can prevent the positioning part from rotating and ensure that the sensor can accurately detect the positioning part. The tightening wrench 523 is fixedly connected to the sleeve 521 through a plug pin. The tightening wrench 523 can be quickly changed for different parts, improving the utilization rate of the equipment.

[0034] like Figure 5 and Figure 6As shown, the first fixing frame 2 includes a mounting frame 21 and a fixing plate 22. The mounting frame 21 is fixedly mounted on the bracket 1. Multiple through holes are provided on one side of the mounting frame 21. These through holes are rectangular elongated holes used to fix the fixing plate 22 to the mounting frame 21 via first bolts. The drive mechanism 4 is fixedly mounted on the fixing plate 22. The first fixing frame 2 also includes second bolts 23. A second bolt 23 is provided on each side of the mounting frame 21. The outer periphery of the second bolt 23 is threaded to the mounting frame 21, and the front end of the second bolt 23 abuts against the fixing plate 22. The second bolt 23, which is arranged opposite to each other, is used to adjust the relative position of the fixing plate 22 and the mounting bracket 21; the bracket 1 also includes a plurality of clamping components 11, which are arranged independently along the bracket 1. The clamping components 11 are fixedly installed in a fixed position, and one end of the clamping component 11 abuts against the periphery of the bracket 1. The clamping component 11 is used to adjust and fix the position of the bracket 1; the clamping component 11 includes a fixing block and a third bolt. The periphery of the third bolt is threadedly connected to the fixing block, and the front end of the third bolt abuts against the bracket 1. The fixing block is fixedly installed in a fixed position.

[0035] During implementation, based on the position of the workpiece to be tightened, the left and right movement position of the fixing plate 22 on the mounting bracket 21 can be set through the through hole opened on one side of the mounting bracket 21. The two sides of the fixing plate 22 are fixed by the second bolt 23, thereby adjusting the left and right movement position of the drive mechanism 4, and further adjusting the left and right position of the rotating motor 51 and the tightening wrench 523 relative to the workpiece. The installation position of the fixing bracket 1 can be adjusted by setting the clamping component 11, and the bracket 1 is fixed by the third bolt, thereby adjusting the front and back position of the tightening wrench 523 relative to the workpiece. This allows for more precise alignment between the tightening wrench 523 and the workpiece hole. The structure design is simple, convenient and quick to adjust, ensuring the quality of workpiece assembly and improving work efficiency.

[0036] The working principle of an automatic tightening device for workpiece assembly is as follows: The part to be tightened is pre-installed on the workpiece to be tightened. The workpiece is sent to the bottom of the automatic tightening device. The drive mechanism 4 drives the rotary motor 51 and the tightening wrench 523 to move towards the part to be tightened. The rotary motor 51 drives the tightening wrench 523 to tighten the part, so that the part moves from top to bottom through the thread. After reaching the end, the displacement sensor detects the displacement of the positioning part. The magnitude of the displacement determines whether the part has been tightened to the end. When it has been tightened to the end, the displacement sensor sends a signal to the controller. The controller causes the rotary motor 51 and the drive mechanism 4 to stop working, the tightening action is completed, the drive mechanism 4 is reset and lifted to the starting position, and the workpiece is transferred to the next station.

[0037] The control method in this embodiment is controlled by a controller. The controller circuit can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, this document is mainly used to protect mechanical devices, and the control method and circuit connection will not be explained in detail here.

[0038] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic tightening device for workpiece assembly, characterized in that: The device includes a bracket (1), a first fixed frame (2), a second fixed frame (3), a drive mechanism (4), and a tightening mechanism (5). The first fixed frame (2) is fixedly installed on the upper end of the bracket (1), the drive mechanism (4) is fixedly installed on the first fixed frame (2), and the second fixed frame (3) is installed on the drive mechanism (4). The tightening mechanism (5) includes a rotating motor (51) and a tightening assembly (52). The rotating motor (51) is fixedly installed on the second fixed frame (3), and the upper end of the tightening assembly (52) is rotatably connected to the lower end of the second fixed frame (3). The tightening assembly (52) is fixedly connected to the output end of the rotating motor (51). The drive mechanism (4) is used to drive the rotating motor (51) and the tightening assembly (52) to move up and down.

2. The automatic tightening device for workpiece assembly according to claim 1, characterized in that: The tightening assembly (52) includes a sleeve (521), a tightening wrench (523), a limiting assembly, and a detection assembly. The upper end of the sleeve (521) is rotatably connected to the lower end of the second fixed frame (3), and the sleeve (521) is a telescopic structure. The tightening wrench (523) is installed at the lower end of the sleeve (521). A limiting assembly is provided between the sleeve (521) and the second fixed frame (3), and a detection assembly is provided between the sleeve (521) and the tightening wrench (523).

3. The automatic tightening device for workpiece assembly according to claim 2, characterized in that: The sleeve (521) includes a first sleeve and a second sleeve. The upper end of the first sleeve is rotatably connected to the lower end of the second fixed frame (3), and the upper end of the first sleeve is fixedly connected to the output end of the rotating motor (51). The side wall of the first sleeve is symmetrically provided with two through slots along the axial direction. The through slots are rectangular through slots. Each through slot is provided with a guide key (522), and the guide key (522) can move up and down along the through slot. One end of each guide key (522) is fixedly connected to the outer periphery of the second sleeve, and the outer periphery of the second sleeve is located in the inner ring of the first sleeve. A tightening wrench (523) can be detachably installed at the lower end of the second sleeve. A compression spring (524) is provided at the top of the inside of the first sleeve, and the lower end of the compression spring (524) abuts against the upper end of the second sleeve.

4. An automatic tightening device for workpiece assembly according to claim 2, characterized in that: The limiting assembly includes a movable plate (525) and a guide rod (526). The movable plate (525) is rotatably arranged around the second sleeve. A guide rod (526) is fixedly installed on each side of the movable plate (525), and the two guide rods (526) are arranged parallel to each other. The periphery of each guide rod (526) is slidably connected to the second fixed frame (3).

5. An automatic tightening device for workpiece assembly according to claim 4, characterized in that: The detection assembly includes a displacement sensor and a positioning component. The displacement sensor is fixedly installed on one side of the second fixed frame (3), and the positioning component is fixedly installed on one side of the movable plate (525). The displacement sensor and the positioning component are arranged opposite to each other.

6. An automatic tightening device for workpiece assembly according to claim 1, characterized in that: The first fixed frame (2) includes a mounting frame (21) and a fixing plate (22). The mounting frame (21) is fixedly mounted on the bracket (1). Multiple through holes are provided on one side of the mounting frame (21). The through holes are rectangular holes. The through holes are used to fix the fixing plate (22) to the mounting frame (21) through the first bolt. The drive mechanism (4) is fixedly mounted on the fixing plate (22).

7. An automatic tightening device for workpiece assembly according to claim 6, characterized in that: The first fixing bracket (2) also includes a second bolt (23). A second bolt (23) is provided on each side of the mounting bracket (21). The outer periphery of the second bolt (23) is threadedly connected to the mounting bracket (21), and the front end of the second bolt (23) abuts against the fixing plate (22). The two opposing second bolts (23) are used to adjust and fix the relative position of the fixing plate (22) and the mounting bracket (21).

8. An automatic tightening device for workpiece assembly according to claim 1, characterized in that: The bracket (1) also includes multiple clamping components (11), which are independently arranged along the bracket (1). The clamping components (11) are fixedly installed in a fixed position, and one end of the clamping component (11) abuts against the periphery of the bracket (1). The clamping component (11) is used to adjust and fix the position of the bracket (1).

9. An automatic tightening device for workpiece assembly according to claim 8, characterized in that: The clamping assembly (11) includes a fixing block and a third bolt. The periphery of the third bolt is threadedly connected to the fixing block, and the front end of the third bolt abuts against the bracket (1). The fixing block is fixedly installed in a fixed position.

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