Automatic screw tightening equipment

Abstract

The utility model discloses an automatic screw tightening device which comprises a base frame, a pressing mechanism and a three-axis screw tightening component are fixedly installed on the top of the base frame, the three-axis screw tightening component is installed above a suspended ceiling assembly of the pressing mechanism, and the tightening component comprises a tightening module. The tightening module comprises a linear moving module, a tightening gun module, a connecting block and a connecting piece, and the tightening gun module is connected to the linear moving module through the connecting block. The pressing mechanism is started, the suspended ceiling assembly drives the fixing clamp to move downwards, proper pressing force is applied to a workpiece, it is ensured that the workpiece is kept stable in the tightening process, the X-axis module, the Y-axis module and the Z-axis module of the linear moving module are started according to instructions of the control system, the X-axis module, the Y-axis module and the Z-axis module move in a combined mode, the tightening gun module is moved to the position above a first screw, and the workpiece is tightened. The tightening gun module is accurately positioned to the position of a screw through the connecting block.

Description

TECHNICAL FIELD

[0001] The utility model belongs to screw assembly processing technical field especially relates to a screw automatic tightening equipment. BACKGROUND

[0002] Screw tightening is the process of firmly combining the screw and the connecting part by applying appropriate torque, and is a common fixing method in mechanical assembly. Manual tools or automatic equipment are used for operation to ensure that the screw reaches the design required tightening torque, thereby realizing the stability and reliability of the connecting part.

[0003] However, the traditional technology has some problems: in the assembly production line, the screw tightening work usually depends on manual operation, which is inefficient and difficult to ensure the assembly quality. CONTENT OF THE UTILITY MODEL

[0004] In view of the problems existing in the prior art, the utility model provides a screw automatic tightening equipment, which solves the problems of screw tightening work usually depending on manual operation and low efficiency.

[0005] The utility model is realized in this way, a screw automatic tightening equipment, including base frame, the base frame top fixed installation has the pressing mechanism and three axle screw tightening part, wherein, three axle screw tightening part installs on the ceiling assembly of pressing mechanism top, the tightening part includes group tightening module, the tightening module contains linear movement module, tightening gun module, connecting block and connecting piece, wherein, the tightening gun module is connected on the linear movement module through the connecting block, the linear movement module is composed of connecting piece, X axle module, Y axle module and Z axle module, and three axle movement actions are made.

[0006] As preferred in the utility model, the pressing mechanism includes a ceiling assembly, a pressing cylinder, a mechanical limit, a lower pressing plate and a floating mechanism, wherein the ceiling assembly includes a top plate, a first support and a gourd, three first supports are fixedly installed on the top plate through bolts, the gourd is placed on the first support, the pressing cylinder is fixedly installed at the bottom of the top plate of the ceiling assembly through bolts, and the pressing cylinder drives the lower pressing plate to move downward.

[0007] As preferred in the utility model, the floating joint of the pressing cylinder is fixedly connected with the lower pressing plate, the mechanical limit is fixedly installed on the base frame through bolts, the mechanical limit is composed of a limiting screw and a buffer, the mechanical limit is fixedly installed with a linear bearing, the mechanical limit and the lower pressing plate are fixedly connected to make a guiding action, and the floating mechanism is installed on the lower pressing plate through the linear bearing.

[0008] As the utility model is preferred, the base frame comprises a welded base, a support column, a cross beam, a linear body column, a lifting base and a linearly moving gas tank assembly, wherein the support column is fixedly installed on the welded base, and the cross beam is fixed on the support column.

[0009] As the utility model is preferred, the linear body column, the lifting base and the linearly moving gas tank assembly are directly fixed on the welded base.

[0010] As the utility model is preferred, the automatic tightening device further comprises a fence, and the fence comprises a safety door lock, a button box, a three-color lamp and an HMI, wherein the safety door lock, the button box, the three-color lamp and the HMI are arranged on the fence body.

[0011] As the utility model is preferred, the automatic tightening device further comprises an automatic nail feeder, and the automatic nail feeder is directly placed outside the fence.

[0012] Compared with the prior art, the utility model has the beneficial effects as follows:

[0013] The utility model discloses a lifting mechanism structure, a small counterforce lifting positioning mechanism, a base frame structure, an automatic nail feeder, a fence structure and an automatic tightening device. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the whole structure schematic view provided by the utility model embodiment;

[0015] Figure 2 It is the structure schematic view of the utility model embodiment provides a pressing mechanism;

[0016] Figure 3 It is the structure schematic view of the utility model embodiment provides a tightening module;

[0017] Figure 4 It is the structure schematic view of the utility model embodiment provides a small counterforce lifting positioning mechanism;

[0018] Figure 5 It is the structure schematic view of the utility model embodiment provides a base frame structure.

[0019] In the drawing: 1, pressing mechanism;2, three-axis screw tightening part;3, small counterforce lifting positioning mechanism;4, base frame;5, automatic nail feeder;6, fence;

[0020] 1-1-1 Ceiling assembly; 1-1-2 Mechanical limit switch; 1-1-3 Lower pressure plate; 1-1-4 Floating mechanism; 1-5 Pressing cylinder;

[0021] 2-1 Linear movement module; 2-2 Connector; 2-3 Connecting block; 2-4 Tightening gun module;

[0022] 3-1. Base plate; 3-2. Sensor; 3-3. Rotating shaft; 3-4. Roller support; 3-5. Rotary drive seat; 3-6. Sensor block; 3-7. Protective cover; 3-8. Rotating seat; 3-9. Linear bearing; 3-1. Second limit switch; 3-11. Support seat; 3-12. Positioning base; 3-13. Leveling block; 3-14. Positioning pin; 3-15. Sensor pin; 3-16. Lifting plate; 3-17. Lifting cylinder; 3-18. Cylinder mounting seat;

[0023] 4-1 Welding base; 4-2 Lifting base; 4-3 Line column; 4-4 Linear moving gas storage tank assembly; 4-5 Support column; 4-6 Crossbeam. Detailed Implementation

[0024] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0025] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0026] Example 1:

[0027] like Figures 1 to 5 As shown in the figure, an automatic screw tightening device provided by this utility model includes a base frame 4. A clamping mechanism 1 and a three-axis screw tightening component 2 are fixedly installed on the top of the base frame 4. The three-axis screw tightening component 2 is installed above the ceiling assembly 1-1 of the clamping mechanism 1. The tightening component includes a tightening module, which includes a linear movement module 2-1, a tightening gun module 2-4, a connecting block 2-3, and a connector 2-2. The tightening gun module 2-4 is connected to the linear movement module 2-1 through the connecting block 2-3. The linear movement module 2-1 is composed of the connector 2-2, an X-axis module, a Y-axis module, and a Z-axis module, and performs three-axis movement.

[0028] The aforementioned automatic screw tightening device is activated by the clamping mechanism 1. The ceiling assembly 1-1 drives the fixing fixture to move downward, applying appropriate clamping force to the workpiece to ensure that the workpiece remains stable during the tightening process. The X-axis, Y-axis and Z-axis modules of the linear movement module 2-1 are activated according to the instructions of the control system. The three axes move together to move the tightening gun module 2-4 above the first screw. The tightening gun module 2-4 is precisely positioned at the screw position through the connecting block 2-3, and the automatic tightening operation begins.

[0029] The tightening parameters such as torque and rotation speed are set according to the screw type, the tightening gun module 2-4 gradually accelerates, and automatically stops after reaching the target torque to avoid screw thread slipping or overtightening.

[0030] The tightening data of each screw, including torque value and tightening time, are recorded for subsequent quality traceability.

[0031] The linear movement module 2-1 moves to the target position of the next screw according to the set path, and repeats the above tightening process to detect whether there are missed or substandard screws. If an abnormality is detected, the device issues an alarm and pauses operation, waiting for the operator to handle.

[0032] In this embodiment, the pressing mechanism 1 includes a ceiling assembly 1-1, a pressing cylinder 1-5, a mechanical limit 1-2, a pressing plate 1-3, and a floating mechanism 1-4. The ceiling assembly 1-1 includes a top plate, three first supports, and a hoist. The three first supports are fixedly installed on the top plate by bolts, and the hoist is placed on the first supports. The pressing cylinder 1-5 is fixedly installed at the bottom of the top plate of the ceiling assembly 1-1 by bolts, and drives the pressing plate 1-3 to move downward. The floating joint of the pressing cylinder 1-5 is fixedly connected to the pressing plate 1-3. The mechanical limit 1-2 is fixedly installed on the base frame 4 by bolts. The mechanical limit 1-2 is composed of a limit screw and a buffer. The mechanical limit 1-2 is fixedly installed with a linear bearing 3-9, and is fixedly connected to the pressing plate 1-3 for guiding action. The floating mechanism 1-4 is installed on the pressing plate 1-3 through the linear bearing 3-9. The rod for pressing is fixed on the floating plate of the floating mechanism 1-4 and passes through the pressing plate 1-3.

[0033] After starting the device, the pressing mechanism 1 performs self-checking. The hoist, motor, and pressing cylinder 1-5 on the ceiling assembly 1-1 are started in sequence to ensure that all connected parts are in normal operation. The mechanical limit 1-2 assembly, including the initial positions of the limit screw and buffer, is checked to confirm the accuracy and controllability of the guiding system.

[0034] The ceiling assembly 1-1 is stably installed on the top of the device frame through the top plate and the first supports. The pressing cylinder 1-5 is started from below the top plate of the ceiling assembly 1-1, and uses its driving force to control the vertical movement of the pressing plate 1-3. The floating joint of the pressing cylinder 1-5 is accurately connected to the pressing plate 1-3 through the linear bearing 3-9, achieving smooth vertical displacement. When the pressing plate 1-3 moves, the mechanical limit 1-2 assembly, including the limit screw and buffer, provides precise guidance to ensure that there is no deviation or shaking during the pressing process.

[0035] The floating mechanism 1-4 is installed on the pressing plate 1-3 and provides flexible displacement compensation through the floating plate. The floating mechanism 1-4 ensures that the pressing action adapts to the height difference or surface unevenness of different workpieces, and the pressing rod passes through the pressing plate 1-3 and is connected with the floating plate to provide uniform and controllable pressing force for the workpiece. When the pressing plate 1-3 moves to the specified position, the floating mechanism 1-4 automatically adjusts the position of the pressing rod to ensure that the pressing force on the workpiece is uniformly distributed. During the pressing process, the buffer of the mechanical limit 1-2 assembly absorbs the kinetic energy at the end of the pressing to prevent the equipment from vibrating or being damaged due to excessive impact force.

[0036] In this embodiment, the base frame 4 includes a welded base 4-1, a support column 4-5, a cross beam 4-6, a linear body column 4-3, a lifting base 4-2, and a linear movement air tank assembly 4-4. The support column 4-5 is fixedly installed on the welded base 4-1, and the cross beam 4-6 is fixed on the support column 4-5. The linear body column 4-3, the lifting base 4-2, and the linear movement air tank assembly 4-4 are directly fixed on the welded base 4-1.

[0037] The support column 4-5 is vertically installed on the welded base 4-1 and serves as a vertical support structure for the equipment. The top of the support column 4-5 is fixedly connected with the cross beam 4-6 through high-strength bolts, and the cross beam 4-6 serves to connect the support columns 4-5 and enhance the rigidity of the frame. The linear body column 4-3 is horizontally arranged on the welded base 4-1 and supports the transmission linear body or the workpiece conveying assembly to ensure stable operation of the workpiece during assembly. The lifting base 4-2 is installed on the welded base 4-1 and is used to support and drive the upward and downward movement of the pressing mechanism 1 or other adjustable modules. The lifting base 4-2 is connected with the welded base 4-1 through a slide rail or a guide rail to ensure the stability of the lifting movement. The linear movement air tank assembly 4-4 is directly fixed on the welded base 4-1 and serves as a key component of the pneumatic system to store and stably supply compressed air and provide a power source for the pneumatic modules of the equipment.

[0038] In this embodiment, the automatic tightening device further includes a fence 6, and the fence 6 includes a safety door lock, a button box, a three-color lamp, and an HMI. The safety door lock, the button box, the three-color lamp, and the HMI are arranged on the main body of the fence 6. The automatic tightening device further includes an automatic nail feeder 5, and the automatic nail feeder 5 is directly placed outside the fence 6.

[0039] After the device is started, the three-color light in the fence 6 is yellow, indicating that the device is ready to start. The operator confirms the device status through the HMI and starts the automatic nail feeder 5. The safety door lock is closed, and the fence 6 forms an isolation protection. The safety door lock state is fed back to the device control system in real time. If the safety door is accidentally opened, the device will stop immediately, the three-color light will turn red, the automatic nail feeder 5 will start, the vibration disc will sort the scattered screws, the sorting mechanism will arrange the screws in the correct direction, and then the screws will be transported to the tightening gun module 2-4 through the nail feeding pipeline. After receiving the nails, the three-axis motion system positions the gun module to the screw hole position of the workpiece, and automatically completes the tightening action. The nail feeding and tightening actions are synchronized to realize continuous screw tightening. The HMI displays the device running state and fault information, and the three-color light indicates the device status in real time. If the screws are exhausted or the nail feeding is abnormal, the system will alarm and automatically stop, and the three-color light will turn red. After the work is completed, the operator stops the device operation through the button box or HMI, the safety door lock is opened, and the fence 6 is released from isolation.

[0040] The automatic nail feeder 5 stops running and arranges the remaining screws, and the device enters standby state.

[0041] Example two:

[0042] The small force lifting positioning mechanism 3 is installed on the lifting base 4-2, and the lifting base 4-2 is installed on the base frame 4; the small force lifting positioning mechanism 3 includes a bottom plate 3-1, a roller support 3-4, a rotating seat 3-8, a rotating drive seat 3-5, a rotating shaft 3-3, a second limit 3-1-, a support seat 3-11, a protective cover 3-7, a cylinder mounting seat 3-18, a lifting plate 3-16, a positioning base 3-12, a sensing pin 3-15, a leveling block 3-13, a positioning pin 3-14, a linear bearing 3-9, a lifting cylinder 3-17, a sensor 3-2, and a sensing block 3-6. The bottom plate 3-1 is provided with a linear bearing 3-9 for guiding, and a roller support 3-4 is installed at the bottom. The rotating seat 3-8 and the rotating drive seat 3-5 are installed on the roller support 3-4 through the rotating shaft 3-3; the second limit 3-1- is directly installed on the bottom plate 3-1 for lifting position limiting; the support seat 3-11 is directly connected with the lifting plate 3-16, and the outside is protected by the protective cover 3-7; the support seat 3-11 directly contacts with the roller for guiding and limiting; the lifting cylinder 3-17 is connected with the cylinder mounting seat 3-18, and the cylinder mounting seat 3-18 is installed on the bottom plate 3-1; the positioning base 3-12 is installed on the lifting plate 3-16, and the leveling block 3-13 and the positioning pin 3-14 are installed on the positioning base 3-12. The sensing pin 3-15 is installed in the positioning base 3-12, and the sensing pin 3-15 is sensed by the sensor to determine whether the tray is in place; the sensor 3-2 is installed on the bottom plate 3-1, and the sensing block 3-6 is installed on the lifting plate 3-16 for sensing whether the lifting cylinder 3-17 is in place.

[0043] The working principle of the utility model:

[0044] Through the start of the pressing mechanism 1, the ceiling assembly 1-1 drives the fixed clamp to move downward, and applies appropriate pressing force to the workpiece, so as to ensure that the workpiece remains stable during the tightening process. The X axis, Y axis and Z axis modules of the linear movement module 2-1 are started according to the instructions of the control system, and the three-axis combined movement moves the tightening gun module 2-4 to the upper side of the first screw. The tightening gun module 2-4 is accurately positioned to the screw position through the connecting block 2-3, and the automatic tightening operation is started.

[0045] It should be noted that in this text, relational terms such as first and second are used merely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", "includes", "including" or any other variations thereof, are intended to cover a non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or apparatus.

[0046] "Include" or any other variation thereof is intended to cover a non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or apparatus.

[0047] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A screw automatic tightening apparatus comprising a base frame (4), characterized in that, The base frame (4) top fixedly installed with the pressing mechanism (1) and three-axis screw tightening component (2), Wherein, the three-axis screw tightening component (2) is installed above the ceiling assembly (1-1) of the pressing mechanism (1), the tightening component (2) includes 3 groups of tightening modules, the tightening module includes linear movement module (2-1), tightening gun module (2-4), connecting block (2-3) and connecting piece (2-2), Wherein, the tightening gun module (2-4) is connected on the linear movement module (2-1) through the connecting block (2-3), the linear movement module (2-1) is composed of connecting piece (2-2), X-axis module, Y-axis module and Z-axis module.

2. A screw automatic tightening apparatus according to claim 1, characterized in that: The pressing mechanism (1) includes ceiling assembly (1-1), pressing cylinder (1-5), mechanical limit (1-2), lower pressing plate (1-3) and floating mechanism (1-4), wherein the ceiling assembly (1-1) includes top plate, first support and gourd, three first supports are fixedly installed on the movable plate of the top plate by bolts, the gourd is placed on the first support, the pressing cylinder (1-5) is fixedly installed at the bottom of the top plate of the ceiling assembly (1-1) by bolts, the pressing cylinder (1-5) drives the lower pressing plate (1-3) to move downward.

3. A screw automatic tightening apparatus according to claim 2, characterized in that: The floating joint of the pressing cylinder (1-5) is fixedly connected with the lower pressing plate (1-3), the mechanical limit (1-2) is fixedly installed on the base frame (4) by bolts, the mechanical limit (1-2) is composed of limit screw and buffer, the mechanical limit (1-2) is fixedly installed with linear bearing, and the mechanical limit (1-2) is fixedly connected with the lower pressing plate (1-3) to guide the movement, the floating mechanism (1-4) is installed on the lower pressing plate (1-3) through the linear bearing.

4. A screw automatic tightening apparatus according to claim 1, characterized by: The base frame (4) includes welded base (4-1), support column (4-5), cross beam (4-6), line body column (4-3), lifting base (4-2) and linear movement gas tank assembly (4-4), wherein the support column (4-5) is fixedly installed on the welded base (4-1), and the cross beam (4-6) is fixed on the support column (4-5).

5. A screw automatic tightening apparatus according to claim 4, characterized in that: The line body column (4-3), lifting base (4-2) and linear movement gas tank assembly (4-4) are directly fixed on the welded base (4-1).

6. A screw automatic tightening apparatus according to claim 1, characterized by: The automatic tightening device further comprises a fence (6), the fence (6) comprises a safety door lock, a button box, a three-color lamp and an HMI, and the safety door lock, the button box, the three-color lamp and the HMI are arranged on the main body of the fence (6).

7. A screw tightening apparatus as claimed in any one of claims 1 to 6, wherein: The automatic tightening device further comprises an automatic nail feeder (5), and the automatic nail feeder (5) is directly placed outside the fence (6).

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