An automatic screwing machine

Abstract

The utility model discloses an automatic screw locking machine relates to electric motor car assembly technical field, including fixed frame, support platform, clamping mouth, head, first sliding block, second sliding block and rotary drive part, and the fixed frame fixed setting is in the top of support platform, and the rear clothes tree of electric motor car is slidably arranged on the support platform, and can slide along the first direction, and the first sliding block is slidably arranged on the fixed frame, and can slide along the second direction, and the second sliding block is slidably arranged on the first sliding block, and can slide along the third direction, and the first direction, the second direction, the third direction two two mutually perpendicular, and the rotary drive part is fixed on the second sliding block, and the output end is fixedly connected with the head, and the clamping mouth includes screw import and two clamping blocks, and the head drops and can push out the screw from the clamping block between, and the rotary drive part can drive the head rotation to tighten the screw. The utility model discloses the automatic degree of high of electric motor car rear clothes tree's screw locking, saves the manpower, and can guarantee that the screw tightening quality is better.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle assembly technology, and in particular to an automatic screw fastening machine. Background Technology

[0002] Currently, the assembly of rear racks for electric vehicles mostly utilizes handheld automatic screw fasteners. These machines add a feeding mechanism to existing electric pistol drills, using a vibratory feeder to arrange screws and transport them to a distributor. The distributor then feeds individual screws to an air tube, where high-pressure air propels them into the chuck. However, these handheld automatic screw fasteners ultimately require manual operation, and the power cord, air tube, and the machine's own weight limit production efficiency. Operators must hold the machine while simultaneously managing the air tube and power cord, leading to inconvenience and fatigue over extended periods, further impacting productivity. Furthermore, manual operation makes it difficult to maintain consistent screw tightening force, potentially resulting in inconsistent product quality. Therefore, there is an urgent need for an automatic screw fastening machine to address these technical problems. Utility Model Content

[0003] The purpose of this utility model is to provide an automatic screw fastening machine to solve the problems existing in the prior art, so as to achieve a high degree of automation in the screw fastening of the rear rack of electric vehicles, save manpower, and ensure good screw tightening quality.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides an automatic screw fastening machine, including a fixed frame, a support platform, a clamp, a screwdriver, a first slider, a second slider, and a rotary drive. The fixed frame is fixedly disposed above the support platform. The rear rack of an electric vehicle is slidably disposed on the support platform and can slide along a first direction. The first slider is slidably disposed on the fixed frame and can slide along a second direction. The second slider is slidably disposed on the first slider and can slide along a third direction. The first direction, the second direction, and the third direction are mutually perpendicular, and the third direction is vertical. The rotary drive is fixedly disposed on the second slider, and the output end of the rotary drive is fixedly connected to the screwdriver. The clamp is disposed on the second slider and includes a screw inlet and two clamping blocks. The screw inlet is used to feed a screw between the two clamping blocks. The screwdriver descends to push the screw out from between the clamping blocks. The rotary drive can drive the screwdriver to rotate to tighten the screw.

[0006] In some embodiments, a fixed platform is also included, with a guide rail provided above the support platform, the guide rail extending along the first direction, and a third slider provided at the bottom of the fixed platform, the third slider being slidably connected to the guide rail.

[0007] In some embodiments, the fixed platform is provided with a clamping mechanism for locking the rear rack of the electric vehicle.

[0008] In some embodiments, the support platform is provided with a plurality of parallel guide rails, and a fixed platform is slidably connected to each guide rail. The number of the first slider, the number of the second slider, the number of the clamps and the number of the caps are the same as the number of the fixed platforms.

[0009] In some embodiments, a touch screen is also included, which is disposed on the fixed frame and is electrically connected to the controllers of the first slider, the second slider, the third slider, and the rotary drive.

[0010] In some embodiments, a support frame is also included, which includes a first bracket and a second bracket. The first bracket is rotatably connected to the second bracket. The end of the first bracket away from the second bracket is rotatably connected to the fixed frame. The end of the second bracket away from the first bracket is rotatably connected to the touch screen. The rotation axis of the first bracket relative to the fixed frame, the rotation axis of the second bracket relative to the first bracket, and the rotation axis of the touch screen relative to the second bracket are all parallel to each other.

[0011] In some embodiments, the rotary drive is a motor, which is fixedly mounted on the second slider via a motor bracket.

[0012] In some embodiments, a torque sensor is also included, which is disposed on the output shaft of the motor for monitoring the output torque of the motor.

[0013] In some embodiments, the screw inlet is fixedly connected to and communicates with an air pipe, which is used to blow the screw between the two clamping blocks.

[0014] In some embodiments, the end of the cape has a magnetic force, and the cape is capable of attracting the screw.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] This utility model provides an automatic screw fastening machine. First, the rear rack of an electric vehicle is installed on a support platform and moved to a preset position. The first slider drives the second slider to move to the same preset position, at which point the screwdriver head aligns with the screw hole of the rear rack. Then, the feeding mechanism feeds the screw into the clamping jaws. The nut end of the screw is held in place by two clamping blocks. With the screw aligned with the screw hole of the rear rack, the second slider drives the rotary drive component and the screwdriver head to move along a third direction, i.e., the second slider descends. During the descent, the screwdriver head is driven to rotate by the rotary drive component. The descending screwdriver head first contacts the nut of the screw and engages in the groove of the nut. The relative position of the screwdriver head and the nut is fixed. The screwdriver head continues to rotate and descend, pushing the screw and separating the two clamping blocks, allowing the screw to disengage from the two clamping blocks. After disengagement, the screwdriver head continues to move downwards until the screw reaches the threaded hole of the rear rack. The rotary drive component continues to drive the screw to rotate. After rotating a set number of times, one screw tightening operation is completed. The screw tightening is highly automated, reducing manpower input, and the screws are locked by rotating drive components, ensuring that the screws on each back hanger are tightened to a consistent standard, which helps to guarantee the quality of screw tightening. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments 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.

[0018] Figure 1 This is a schematic diagram of the structure of the automatic screw fastening machine in some embodiments of this utility model;

[0019] Figure 2 This is a front view of an automatic screw fastening machine in some embodiments of this utility model;

[0020] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0021] Figure 4 This is a rear view of an automatic screw fastening machine in some embodiments of this utility model.

[0022] In the diagram: 1-Fixed frame; 2-Support platform; 3-Back hanger; 4-Clamping mechanism; 5-Fixed platform; 6-First slider; 7-Second slider; 8-Rotation drive component; 9-Headpiece; 10-Gripper; 101-Screw inlet; 102-Clamping block; 11-Touch screen; 12-Support frame; 121-First bracket; 122-Second bracket; 13-Guide rail; 14-Base plate; 15-Support rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] The purpose of this utility model is to provide an automatic screw fastening machine to solve the problems existing in the prior art, so as to achieve a high degree of automation in the screw fastening of the rear rack of electric vehicles, save manpower, and ensure good screw tightening quality.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1-4As shown, this utility model provides an automatic screw fastening machine, including a fixed frame 1, a support platform 2, a clamping mouth 10, a screwdriver head 9, a first slider 6, a second slider 7, and a rotary drive component 8. The fixed frame 1 is fixedly disposed above the support platform 2. The rear rack 3 of an electric vehicle is slidably disposed on the support platform 2 and can slide along a first direction. The first slider 6 is slidably disposed on the fixed frame 1 and can slide along a second direction. The second slider 7 is slidably disposed on the first slider 6 and can slide along a third direction. The first direction, the second direction, and the third direction are mutually perpendicular. The three directions are vertical. The rotary drive 8 is fixedly mounted on the second slider 7, and the output end of the rotary drive 8 is fixedly connected to the clamp head 9. The clamp 10 is mounted on the second slider 7. The clamp 10 includes a screw inlet 101 and two clamping blocks 102. The screw inlet 101 is located on the upper side of the clamping blocks 102, and the clamp head 9 is located directly above the clamping blocks 102. The screw inlet 101 is used to feed screws between the two clamping blocks 102. The clamp head 9 descends to push the screws out from between the clamping blocks 102. The rotary drive 8 can drive the clamp head 9 to rotate to tighten the screws. Specifically, the working process is as follows: The rear rack 3 of the electric vehicle is installed on the support platform 2 and moved to a preset position. The first slider 6 drives the second slider 7 to move to the preset position as well. At this time, the clamp head 9 can be aligned with the screw hole of the rear rack 3. At this time, the feeding mechanism can feed screws into the clamping nozzle 10. The nut end of the screw can be held by two clamping blocks 102. The screw is aligned with the screw hole of the back hanger 3. The second slider 7 drives the rotary drive 8 and the screw head 9 to move along a third direction, that is, the second slider 7 descends. During the descent, the screw head 9 is driven to rotate by the rotary drive 8. The screw head 9 descends and first contacts the nut of the screw. The screw head 9 is inserted into the groove of the nut. The relative position of the screw head 9 and the nut is fixed. The screw head 9 continues to rotate and descend, which can push the screw and push the two clamping blocks 102 apart, so that the screw can be released from the two clamping blocks 102. After being released, the screw head 9 continues to move downward. The screw reaches the threaded hole of the back hanger 3. The rotary drive 8 continues to drive the screw to rotate. After rotating a set number of times, one screw tightening operation is completed. The screw tightening is highly automated, reducing the input of manpower. Moreover, the screw is locked by the rotary drive 8, so that the screw tightening standard on each back hanger 3 is consistent, which helps to ensure the tightening quality of the screw. Moreover, the sliding directions of the first slider 6, the second slider 7, and the rear hanger 3 are perpendicular to each other, enabling the automatic screw fastening machine to be adjusted in three dimensions and achieve precise positioning in three-dimensional space.

[0027] It should be noted that the automatic screw fastening machine is also equipped with a fixed base, which includes a base plate 14 and support rods 15. The support rods 15 are fixed and vertically installed at the four corners of the base plate 14, and the support platform 2 is fixedly installed above the support rods 15. The fixed base provides a large contact area between the base plate 14 and the ground, resulting in high stability and further improving the operational stability of the automatic screw fastening machine.

[0028] In some embodiments, the automatic screw fastening machine further includes a fixed platform 5, with a guide rail 13 positioned above the support platform 2. The guide rail 13 extends along a first direction, and a third slider is positioned at the bottom of the fixed platform 5, slidably connected to the guide rail 13. The guide rail 13 extends along the first direction, and the third slider slidably engages with the guide rail 13, providing rigid guidance for the fixed platform 5 (and the back hanger 3 placed thereon). This ensures that the sliding trajectory of the back hanger 3 in the first direction is strictly linear, avoiding displacement or wobbling that might occur due to uneven friction on the surface of the support platform 2 or shift in the workpiece's center of gravity when the guide rail 13 is absent. Furthermore, the fixed platform 5 can be designed with a corresponding positioning structure according to the dimensions of the back hanger 3, facilitating the installation of the back hanger 3 and improving installation speed.

[0029] In some embodiments, a clamping mechanism 4 is provided on the fixing platform 5, which is used to lock the rear rack 3 of the electric vehicle. When the screws are tightened, the cap 9 applies rotational force and axial pressure to the rear rack 3. If it relies solely on its own weight or is simply placed, slight displacement (such as rotation or offset) is likely to occur, leading to misalignment between the screw hole and the screw, causing problems such as stripping and damage to the screw hole. The clamping mechanism 4 rigidly fixes the rear rack 3 with mechanical force, which can eliminate such displacement to a certain extent, ensuring that the screw is always tightened along the preset axis and improving the stability of the tightening quality. The clamping mechanism 4 can be linked with the equipment's control system (e.g., after the back hanger 3 is placed in place by a sensor, the clamping action is automatically triggered, or a control button for the clamping mechanism 4 is set so that pressing the control button of the clamping mechanism 4 after the back hanger 3 is placed in place causes the clamping mechanism 4 to perform a clamping action), eliminating the need for manual pressing or fixing of the workpiece. For example, the clamping mechanism 4 can be set to cylinder clamping, with the cylinder set vertically and a clamping block fixedly connected to the piston rod of the cylinder. The piston rod of the cylinder drives the clamping block to move up and down. When the back hanger 3 is placed in place, the piston rod of the cylinder drives the clamping block to move down, thereby pressing the back hanger 3.

[0030] In some embodiments, the support platform 2 is provided with multiple parallel guide rails 13, and a fixed platform 5 is slidably connected to each guide rail 13. The number of first sliders 6, second sliders 7, clamps 10, and capes 9 is the same as the number of fixed platforms 5, which is equivalent to providing multiple processing stations and improving production efficiency. Multiple stations can work alternately. When the screws of the back hanger 3 of one station are tightened, other stations can simultaneously perform operations such as loading, positioning, and tightening, avoiding the waste of time waiting for loading and unloading in single-station mode.

[0031] In some embodiments, the automatic screw fastening machine further includes a touch screen 11, which is mounted on the fixed frame 1 and is electrically connected to the controllers of the first slider 6, the second slider 7, the third slider, and the rotary drive 8. The touch screen 11 can display the movement parameters (such as position coordinates and movement speed) of the first slider 6 (second direction), the second slider 7 (third direction), and the third slider (first direction) and the working parameters (such as rotational speed, number of tightening turns, and torque threshold) of the rotary drive 8 through a graphical interface (such as buttons, sliders, and input boxes). The screen can display the real-time operating status of each component (such as the current position of the slider, the rotational speed of the screwdriver 9, and the actual tightening torque). Operators can adjust the parameters on-site according to production needs (such as changing the model of the hanger 3).

[0032] In some embodiments, the automatic screw fastening machine further includes a support frame 12, which includes a first bracket 121 and a second bracket 122. The first bracket 121 and the second bracket 122 are rotatably connected. The end of the first bracket 121 away from the second bracket 122 is rotatably connected to a fixed frame 1, and the end of the second bracket 122 away from the first bracket 121 is rotatably connected to a touch screen 11. The rotation axes of the first bracket 121 relative to the fixed frame 1, the second bracket 122 relative to the first bracket 121, and the touch screen 11 relative to the second bracket 122 are all parallel to each other. The touch screen 11 can be fitted to or removed from the fixed frame 1, and its deflection angle can be adjusted. The operator can adjust the position of the touch screen 11 according to their habits or scenario requirements.

[0033] In some embodiments, the rotary drive component 8 is a motor, which can be a stepper motor or a servo motor, etc. The motor is fixedly mounted on the second slider 7 via a motor bracket. It should be noted that the rotary drive component 8 can also be a pneumatic motor, a hydraulic motor, an electromagnetic drive rotation mechanism, etc., as long as it can realize the rotation of the head 9.

[0034] In some embodiments, the automatic screw fastening machine also includes a torque sensor, which is mounted on the output shaft of the motor to monitor the output torque of the motor. The torque sensor can capture the actual torque of the motor output shaft in real time (such as the resistance torque when the screw is screwed into the threaded hole, and the final torque after tightening) and feed the data back to the control system. When the actual torque is close to a preset threshold, the system can automatically reduce the motor speed to avoid torque exceeding the standard due to inertia; if the torque does not reach the standard (such as abnormally low resistance due to screw stripping), an alarm is triggered and the operation is stopped to prevent defective products from being discharged. It should be noted that when the screwdriver 9 drives the screw to descend, the screw encounters a certain resistance after contacting the screw hole. At this time, the screwdriver 9 decelerates and descends, and the torque sensor continuously monitors the torque of the screw until the torque reaches the preset value.

[0035] In some embodiments, the screw inlet 101 is fixedly connected to and communicates with the air pipe, which is used to blow the screw into the space between the two clamping blocks 102. Compressed air can blow the screw directly from the screw inlet 101 to the space between the clamping blocks 102 at a high speed through the air pipe, eliminating the need for step-by-step actions of mechanical push rods, conveyor belts, and other components, thus reducing the idle time of the clamping nozzle 10 waiting for the screw. Especially in multi-station equipment, high-speed feeding can precisely match the tightening rhythm of the screw head 9, avoiding slowing down the overall production efficiency due to feeding delays. The screw is constrained by the airflow in the air pipe and moves along the axis of the pipe cavity. When it reaches the space between the clamping blocks 102, its posture is more uniform (e.g., the screw is aligned with the center of the clamping block 102, and the nut abuts against the end of the clamping block 102), which facilitates the two clamping blocks 102 to accurately hold the nut.

[0036] In some embodiments, the end of the screwdriver 9 has a magnetic force, enabling it to attract screws. When the screwdriver 9 descends and pushes open the clamping block 102, the screw disengages from the clamping jaw 10. If there is no external force restraining it at this time, the screw may fall off due to gravity, equipment vibration, or slight impact when the screwdriver 9 contacts it. The magnetic force of the screwdriver 9 can firmly attract the screw to the end of the screwdriver 9 the moment it disengages from the clamping block 102, avoiding problems such as machine downtime for material handling and workpiece scratches caused by the screw falling off.

[0037] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An automatic screw fastening machine, characterized in that: The device includes a fixed frame, a support platform, a clamp, a clip, a first slider, a second slider, and a rotary drive. The fixed frame is fixedly mounted above the support platform. The rear rack of the electric vehicle is slidably mounted on the support platform and can slide along a first direction. The first slider is slidably mounted on the fixed frame and can slide along a second direction. The second slider is slidably mounted on the first slider and can slide along a third direction. The first direction, the second direction, and the third direction are mutually perpendicular, and the third direction is vertical. The rotary drive is fixedly mounted on the second slider, and its output end is fixedly connected to the clip. The clamp is mounted on the second slider and includes a screw inlet and two clamping blocks. The screw inlet is used to feed a screw between the two clamping blocks. The clip descends to push the screw out from between the clamping blocks. The rotary drive can drive the clip to rotate to tighten the screw.

2. The automatic screw fastening machine according to claim 1, characterized in that: It also includes a fixed platform, on which a guide rail is provided above the support platform and extends along the first direction. A third slider is provided at the bottom of the fixed platform and is slidably connected to the guide rail.

3. The automatic screw fastening machine according to claim 2, characterized in that: The fixed platform is equipped with a clamping mechanism, which is used to lock the rear rack of the electric vehicle.

4. The automatic screw fastening machine according to claim 2, characterized in that: The support platform is provided with multiple parallel guide rails, and each guide rail is slidably connected to a fixed platform. The number of the first slider, the number of the second slider, the number of the clamps and the number of the caps are the same as the number of the fixed platforms.

5. The automatic screw fastening machine according to claim 2, characterized in that: It also includes a touch screen, which is mounted on the fixed frame and is electrically connected to the controllers of the first slider, the second slider, the third slider, and the rotary drive.

6. The automatic screw fastening machine according to claim 5, characterized in that: It also includes a support frame, which includes a first bracket and a second bracket. The first bracket and the second bracket are rotatably connected. The end of the first bracket away from the second bracket is rotatably connected to the fixed frame. The end of the second bracket away from the first bracket is rotatably connected to the touch screen. The rotation axis of the first bracket relative to the fixed frame, the rotation axis of the second bracket relative to the first bracket, and the rotation axis of the touch screen relative to the second bracket are all parallel to each other.

7. The automatic screw fastening machine according to claim 1, characterized in that: The rotation drive component is a motor, which is fixedly mounted on the second slider via a motor bracket.

8. The automatic screw fastening machine according to claim 7, characterized in that: It also includes a torque sensor, which is mounted on the output shaft of the motor to monitor the output torque of the motor.

9. The automatic screw fastening machine according to claim 1, characterized in that: The screw inlet is fixedly connected to and communicates with the air pipe, which is used to blow the screw between the two clamping blocks.

10. The automatic screw fastening machine according to claim 1, characterized in that: The end of the cape has a magnetic force, and the cape is able to attract the screw.

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