Automatic tightening robot

Abstract

The automatic tightening robot comprises a supporting table and a portal frame fixedly connected to the top of the supporting table, a containing assembly is further arranged at the top of the supporting table, and a clamping assembly used in cooperation with the containing assembly is installed at the position, corresponding to the containing assembly, of the portal frame. A tightening assembly is further installed on the portal frame and located on one side of the clamping assembly. The automatic assembling device is high in automation degree and easy and convenient to operate, only motor components need to be simply placed, follow-up clamping, tightening, rotating and other operations can be automatically completed, the labor intensity is greatly reduced, and the assembling efficiency is improved; the assembly precision is excellent, the tightening torque of each screw is ensured to be consistent through accurate clamping and tightening control, and the motor assembly quality is improved; the motor shell is driven to rotate synchronously by means of assemblies such as the servo motor, and the position does not need to be adjusted manually; the stability after rotation is good, and the stability of the rotary placing seat after rotation is ensured by utilizing the electromagnet, the sleeve spring, the clamping block and other structures.

Description

Technical Field

[0001] This invention relates to the field of tightening robot technology, and in particular to an automatic tightening robot. Background Technology

[0002] In the automotive manufacturing industry, the electric motor is one of the key components, and its assembly quality directly affects the performance and reliability of the vehicle. During the assembly of automotive electric motors, securing the motor end cap and motor housing with screws is a crucial step.

[0003] Traditional assembly methods for motor end caps and motor housings often rely on manual operation. Workers need to manually place the motor housing in the appropriate position and then tighten each screw one by one. This method is not only labor-intensive and inefficient, but manual operation also makes it difficult to ensure that the tightening torque of each screw is consistent, which can easily lead to assembly quality problems. For example, insufficient tightening of screws can cause the motor to loosen and make abnormal noises during operation, while over-tightening of screws can damage the threads, affecting the service life and performance stability of the motor.

[0004] With the development of automation technology, although some automated assembly equipment has emerged, some equipment still has functional shortcomings. For example, some machines require manual adjustment of the motor housing position after tightening one screw before tightening the next, which is cumbersome and lacks a high degree of automation. Other machines lack effective positioning devices during motor housing rotation, resulting in unstable motor housing position and affecting the accuracy of subsequent screw tightening and assembly quality. Therefore, developing an automated tightening robot with a high degree of automation, high assembly accuracy, and guaranteed assembly stability is of significant practical importance. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic tightening robot with a high degree of automation and simple operation. It only requires placing the motor components, and subsequent clamping, tightening, and rotation operations can all be completed automatically, significantly reducing labor intensity and improving assembly efficiency. It boasts excellent assembly precision, ensuring consistent tightening torque for each screw through precise clamping and tightening control, thus improving the quality of motor assembly. It can achieve continuous screw tightening by using servo motors and other components to drive the motor housing to rotate synchronously, eliminating the need for manual position adjustments. It exhibits excellent stability after rotation, utilizing electromagnets, springs, and locking blocks to ensure the stability of the rotating placement base after rotation.

[0006] To achieve the above objectives, the main technical solutions adopted by the present invention include: An automated tightening robot includes: The support platform and the gantry frame fixedly connected to the top of the support platform are provided. The top of the support platform is also provided with a placement component. A clamping component for cooperating with the placement component is installed on the gantry frame and at the position corresponding to the placement component. A tightening component is also installed on the gantry frame and on one side of the clamping component. A rotation drive component for driving the placement component is installed on one side of the gantry frame and at the position corresponding to the placement component. A positioning component for positioning the placement component is installed on the other side of the gantry frame and at the position corresponding to the placement component.

[0007] In the aforementioned automatic tightening robot, the placement component includes a rotatable rotating placement seat, a rotating support column is fixedly connected to the center of the bottom of the rotating placement seat, and the bottom of the rotating support column is rotatably connected to the top of the support platform through a bearing.

[0008] In the aforementioned automatic tightening robot, the rotary drive assembly includes a second servo motor fixedly connected to the side of the gantry frame, an active bevel gear fixedly connected to the output shaft of the second servo motor, and a driven gear ring that cooperates with the active bevel gear is installed at the edge of the rotary placement seat and at the position corresponding to the active bevel gear.

[0009] In the aforementioned automatic tightening robot, the positioning component includes a mounting cylinder fixedly connected to the inner wall side of the gantry frame. An electromagnet is mounted on the inner wall side of the mounting cylinder. A sliding iron block is slidably disposed on the inner wall of the mounting cylinder corresponding to the position of the electromagnet. A connecting slide rod is fixedly connected to the side of the sliding iron block. A T-shaped locking block is fixedly connected to the other end of the connecting slide rod. Several locking slots are formed around the edge of the rotating placement seat corresponding to the position of the T-shaped locking block. A spring is sleeved on the connecting slide rod located between the T-shaped locking block and the mounting cylinder.

[0010] In the aforementioned automatic tightening robot, the top of the rotating placement seat is provided with a motor shaft receiving groove.

[0011] In the aforementioned automatic tightening robot, a placement pad for placing the motor housing is provided on the top of the rotating placement seat at the position corresponding to the motor shaft receiving groove.

[0012] In the aforementioned automatic tightening robot, a plurality of equidistant limiting balls are provided at the bottom edge of the rotating placement seat, and the bottom of the rotating placement seat is tactilely connected to the top of the support platform through the limiting balls.

[0013] The aforementioned automatic tightening robot includes a clamping electric cylinder fixedly connected to the top of the gantry frame, and a clamping plate is rotatably mounted on the output end of the clamping electric cylinder via a bearing.

[0014] The aforementioned automatic tightening robot includes a tightening assembly comprising an electric push rod fixedly connected to the gantry frame, a servo motor fixedly connected to the output end of the electric push rod, and an internal hexagonal sleeve mounted on the output shaft of the servo motor.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. This invention features a high degree of automation and simple operation. Only the motor components need to be placed; subsequent clamping, tightening, and rotation operations are all completed automatically, significantly reducing labor intensity and improving assembly efficiency. It boasts excellent assembly precision, ensuring consistent tightening torque for each screw through precise clamping and tightening control, thus improving motor assembly quality. Continuous screw tightening is possible, with the motor housing rotating synchronously using servo motors and other components, eliminating the need for manual position adjustments. It exhibits excellent stability after rotation, utilizing electromagnets, springs, and locking blocks to ensure the stability of the rotating placement base after rotation. Furthermore, its reasonable structure, with the rotating placement base connected by limit ball bearings, ensures smooth operation, minimal wear, and overall stable and reliable operation. 2. High degree of automation and simple operation: When installing the motor end cover and motor housing, this invention only requires placing the motor housing on the placement pad on top of the rotating placement seat, inserting the motor shaft into the motor shaft receiving groove, and then placing the motor end cover on the motor housing. Subsequent clamping, tightening, and rotation operations can all be completed automatically by the robot. There is no need for manual tightening of screws or manual adjustment of the motor housing position, greatly reducing labor intensity and improving assembly efficiency.

[0016] 3. High Assembly Precision: The clamping cylinder moves the clamping plate downwards to apply pressure to the motor end cover, ensuring it is firmly against the motor housing and guaranteeing the relative positional accuracy between the motor end cover and the motor housing. Simultaneously, the electric push rod moves the servo motor downwards, accurately placing the hexagonal socket onto the mounting bolt. The servo motor then drives the hexagonal socket to tighten the bolt, precisely controlling the tightening torque to ensure consistent tightening quality for each screw. This effectively avoids inconsistent tightening torque caused by manual operation, improving the accuracy and reliability of motor assembly.

[0017] 4. Continuous screw tightening: After one bolt is tightened, the servo motor drives the active bevel gear to rotate. Under the meshing action of the driven gear ring, the rotating placement seat rotates, which in turn drives the clamped motor housing and end cover to rotate synchronously. This facilitates the tightening of the next bolt through the tightening assembly. This achieves continuous screw tightening without the need for manual intervention to adjust the motor housing position, further improving assembly efficiency.

[0018] 5. Excellent stability after rotation: When the rotary placement base rotates, the power to the electromagnet is turned on. The electromagnet generates magnetism and attracts the sliding iron block, causing the T-shaped locking block to disengage from the slot on the side of the rotary placement base and compressing the spring. After the rotary placement base has finished rotating, the power to the electromagnet is turned off. Under the elastic force of the spring, the T-shaped locking block is driven into the corresponding slot, thus ensuring the stability of the rotary placement base after rotation. This avoids affecting the accuracy of subsequent screw tightening and assembly quality due to the unstable position of the rotary placement base after rotation, ensuring the smooth progress of the entire assembly process.

[0019] 6. Reasonable structure and stable operation: The bottom of the rotating placement seat is connected to the top of the support platform via limiting ball bearings, reducing friction during rotation and making the rotation smoother and more stable. This also reduces wear and tear on the equipment and extends its service life. Furthermore, the compact and reasonable layout of the components, working in perfect harmony, ensures the overall stability and reliability of the robot's operation. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a schematic diagram of the automatic tightening robot of the present invention; Figure 2 This is a structural schematic diagram of the automatic tightening robot of the present invention from another perspective; Figure 3 This is a cross-sectional structural diagram of the automatic tightening robot of the present invention; Figure 4 This is a schematic diagram of the structure of the component placed in the automatic tightening robot of the present invention; Figure 5 This is a cross-sectional structural diagram of the component placed in the automatic tightening robot of the present invention; Figure 6 This is a schematic diagram of the clamping component in the automatic tightening robot of the present invention; Figure 7 This is a schematic diagram of the tightening component in the automatic tightening robot of the present invention; Figure 8 This is a schematic diagram of the rotary drive assembly in the automatic tightening robot of the present invention; Figure 9 This is a schematic diagram of the positioning component in the automatic tightening robot of the present invention; Figure 10 This is a cross-sectional structural diagram of the positioning component in the automatic tightening robot of the present invention.

[0021] Explanation of icon numbers: 1. Support platform; 2. Gantry frame; 3. Placement assembly; 4. Clamping assembly; 5. Tightening assembly; 6. Rotation drive assembly; 7. Positioning assembly; 301, Rotating placement base; 3011, Rotating support column; 302, Motor shaft receiving groove; 3021, Placement pad; 303. Limiting ball bearings; 401. Clamping electric cylinder; 4011. Clamping plate; 501. Electric linear actuator; 5011. Servo motor 1; 5012. Hex socket sleeve; 601. Servo motor II; 6011. Driving bevel gear; 6012. Driven gear ring; 701, Mounting cylinder; 7011, Electromagnet; 7012, Sliding iron block; 7013, Connecting slide rod; 7014, T-shaped locking block; 7015, Locking groove; 7016, Spring sleeve. Detailed Implementation

[0022] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0023] Please refer to Figures 1 to 10 As shown, an embodiment of the present invention provides an automatic tightening robot, including a support platform 1 and a gantry frame 2 fixedly connected to the top of the support platform 1. The top of the support platform 1 is also provided with a placement component 3. A clamping component 4 for cooperating with the placement component 3 is installed on the gantry frame 2 at a position corresponding to the placement component 3. A tightening component 5 is also installed on the gantry frame 2 on one side of the clamping component 4. A rotation drive component 6 for driving the placement component 3 is installed on one side of the gantry frame 2 at a position corresponding to the placement component 3. A positioning component 7 for positioning the placement component 3 is installed on the other side of the gantry frame 2 at a position corresponding to the placement component 3.

[0024] By adopting the above technical solution, a compact and functionally coordinated automatic tightening robot framework was constructed. The components are rationally arranged, providing a stable foundation for the subsequent automated assembly of the motor end cap and motor housing.

[0025] To achieve stable placement and flexible rotation of the motor housing, in this embodiment: the placement assembly 3 includes a rotatable rotating placement seat 301. A rotating support column 3011 is fixedly connected to the center of the bottom of the rotating placement seat 301. The bottom of the rotating support column 3011 is rotatably connected to the top of the support platform 1 through a bearing. By cooperating with the bearing, the rotating placement seat 301 can rotate smoothly and flexibly on the support platform 1, providing a basis for the subsequent rotation operation of the motor housing, facilitating the tightening of bolts at different positions on the motor housing, and improving assembly efficiency.

[0026] To provide precise rotational driving force for the rotary placement seat 301, in this embodiment: the rotary drive assembly 6 includes a servo motor 601 fixedly connected to the side of the gantry 2. A drive bevel gear 6011 is fixedly connected to the output shaft of the servo motor 601. A driven gear ring 6012 that works with the drive bevel gear 6011 is installed at the edge of the rotary placement seat 301 and at the position corresponding to the drive bevel gear 6011. By using the servo motor 601 as the power source and cooperating with the transmission structure of the drive bevel gear 6011 and the driven gear ring 6012, the rotation angle and speed of the rotary placement seat 301 can be precisely controlled, achieving precise positioning and rotation of the motor housing, meeting different assembly process requirements, and improving assembly accuracy.

[0027] To ensure the stable positioning of the rotating placement seat 301 after rotation, in this embodiment: the positioning component 7 includes a mounting cylinder 701 fixedly connected to the inner wall side of the gantry frame 2. An electromagnet 7011 is mounted on the inner wall side of the mounting cylinder 701. A sliding iron block 7012 is slidably disposed on the inner wall of the mounting cylinder 701 corresponding to the position of the electromagnet 7011. A connecting slide rod 7013 is fixedly connected to the side of the sliding iron block 7012. A T-shaped locking block 7014 is fixedly connected to the other end of the connecting slide rod 7013. At the edge of the rotating placement seat 301, corresponding to the T-shaped locking block 7014... The T-shaped locking block 7014 has several slots 7015 around its position. A spring 7016 is sleeved on the connecting slide rod 7013 located between the T-shaped locking block 7014 and the mounting cylinder 701. By controlling the on and off of the electromagnet 7011, combined with the linkage structure of the sliding iron block 7012, the connecting slide rod 7013, the T-shaped locking block 7014, the slots 7015 and the spring 7016, the automatic positioning and locking of the rotating placement seat 301 after rotation is realized, ensuring the stability of the motor housing during the tightening of bolts and avoiding the impact of shaking on the assembly quality.

[0028] In order to ensure that the motor shaft is accurately positioned during assembly, in this embodiment, the top of the rotating placement seat 301 is provided with a motor shaft receiving groove 302. The motor shaft receiving groove 302 provides a precise positioning space for the motor shaft, ensuring that when the motor housing is placed on the rotating placement seat 301, the motor shaft can accurately fall into it, thereby ensuring the accuracy of the assembly position of the motor housing and the motor end cover and improving the assembly quality.

[0029] To better protect the motor housing and make it more stable, in this embodiment, a placement pad 3021 for placing the motor housing is provided on the top of the rotating placement base 301 at the position corresponding to the motor shaft receiving groove 302. The placement pad 3021 can effectively buffer the impact force when the motor housing is placed, avoid damage to the surface of the motor housing, and increase the friction between the motor housing and the rotating placement base 301, making the motor housing more stable and preventing slippage during assembly, thus ensuring the smooth progress of the assembly process.

[0030] To reduce friction and improve rotational stability during the rotation of the rotating placement seat 301, in this embodiment, a plurality of equidistant limiting balls 303 are provided at the bottom edge of the rotating placement seat 301, and the bottom of the rotating placement seat 301 is connected to the top of the support platform 1 by the limiting balls 303. The limiting balls 303 convert the sliding friction between the rotating placement seat 301 and the support platform 1 into rolling friction, which greatly reduces the friction during rotation, making the rotating placement seat 301 rotate more easily and smoothly, reducing equipment energy consumption and wear, and extending the service life of the equipment.

[0031] To achieve stable clamping of the motor end cover, in this embodiment: the clamping assembly 4 includes a clamping electric cylinder 401 fixedly connected to the top of the gantry 2. A clamping plate 4011 is rotatably mounted on the output end of the clamping electric cylinder 401 via a bearing. The clamping electric cylinder 401 can provide a stable and adjustable clamping force. The clamping plate 4011 applies pressure to the motor end cover, making it firmly abut against the motor housing, ensuring that the motor end cover will not shift during the tightening of bolts, thus guaranteeing assembly quality. At the same time, the clamping plate 4011 is rotatably mounted via a bearing. When the rotating placement seat 301 drives the motor housing to rotate, the clamping plate 4011 can rotate synchronously with it, avoiding damage to the motor end cover or abnormal assembly due to friction.

[0032] To automate the bolt tightening process, in this embodiment, the tightening assembly 5 includes an electric push rod 501 fixedly connected to the gantry frame 2. A servo motor 5011 is fixedly connected to the output end of the electric push rod 501. An internal hexagon socket 5012 is mounted on the output shaft of the servo motor 5011. The electric push rod 501 can precisely control the up-and-down movement distance of the servo motor 5011, so that the internal hexagon socket 5012 is accurately fitted onto the mounting bolt. The servo motor 5011 provides stable rotational power, driving the internal hexagon socket 5012 to tighten the bolt, thereby achieving automated bolt tightening and improving assembly efficiency and the consistency of tightening quality.

[0033] The working principle of this invention is: During the installation of the motor end cover and the motor housing, the motor housing is first placed stably on the placement pad 3021 on top of the rotating placement base 301, ensuring that the motor shaft is accurately inserted into the motor shaft receiving groove 302, thus achieving initial positioning of the motor housing. Next, the motor end cover is placed on the motor housing, and then the clamping electric cylinder 401 is activated. The output end of the clamping electric cylinder 401 drives the clamping plate 4011, which is rotatably mounted through the bearing, to move downward, applying appropriate pressure to the motor end cover, so that the motor end cover is firmly abutted against the motor housing, completing the initial fixation of the motor end cover and the motor housing.

[0034] Next, the electric push rod 501 is activated. The output end of the electric push rod 501 drives the servo motor 5011 to move downward, so that the hexagonal socket 5012 mounted on the output shaft of the servo motor 5011 is accurately fitted onto the mounting bolt. Then, the servo motor 5011 is activated, and the servo motor 5011 drives the hexagonal socket 5012 to rotate, thereby realizing the tightening operation of the bolt.

[0035] After one bolt is tightened, servo motor 601 is started. The output shaft of servo motor 601 drives the active bevel gear 6011 to rotate. Since the active bevel gear 6011 meshes with the driven gear ring 6012 at the edge of the rotary placement seat 301, the rotary placement seat 301 is driven to rotate. This causes the motor housing and motor end cover clamped between the clamping plate 4011 and the rotary placement seat 301 to rotate synchronously, rotating the next bolt to be tightened to the underside of the tightening assembly 5, so that the bolt can be tightened by the tightening assembly 5, thus achieving continuous tightening of bolts.

[0036] While the rotating placement base 301 rotates, the power supply to the electromagnet 7011 is turned on. The electromagnet 7011 generates magnetism, which attracts the sliding iron block 7012, causing the sliding iron block 7012 to slide inside the mounting cylinder 701. This drives the connecting slide rod 7013 and the T-shaped locking block 7014 fixed to the other end of the connecting slide rod 7013 to move away from the rotating placement base 301. This causes the T-shaped locking block 7014 to disengage from the locking groove 7015 on the side of the rotating placement base 301, while simultaneously compressing the sleeve spring 7016 sleeved on the connecting slide rod 7013.

[0037] When the rotary mounting base 301 rotates to the designated position and the bolt position is switched, the power supply to the electromagnet 7011 is disconnected. The electromagnet 7011 loses its magnetism, and the sliding block 7012 moves towards the rotary mounting base 301 under the elastic force of the spring 7016. This causes the connecting slide rod 7013 and the T-shaped locking block 7014 to reset, allowing the T-shaped locking block 7014 to engage in the corresponding slot 7015. This achieves positioning and locking of the rotary mounting base 301, ensuring its stability during subsequent bolt tightening and guaranteeing the accuracy and reliability of the entire assembly process. Through this series of operations, automated and high-precision assembly of the motor end cover and motor housing is achieved.

[0038] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept by means of the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. An automatic tightening robot, comprising a support platform (1) and a gantry frame (2) fixedly connected to the top of the support platform (1), characterized in that, The top of the support platform (1) is also provided with a placement component (3). A clamping component (4) for use with the placement component (3) is installed on the gantry frame (2) at the position corresponding to the placement component (3). A tightening component (5) is also installed on the gantry frame (2) on one side of the clamping component (4). A rotation drive component (6) for driving the placement component (3) is installed on one side of the gantry frame (2) at the position corresponding to the placement component (3). A positioning component (7) for positioning the placement component (3) is installed on the other side of the gantry frame (2) at the position corresponding to the placement component (3).

2. The automatic tightening robot according to claim 1, characterized in that: The placement assembly (3) includes a rotatable rotating placement seat (301), a rotating support column (3011) is fixedly connected to the center of the bottom of the rotating placement seat (301), and the bottom of the rotating support column (3011) is rotatably connected to the top of the support platform (1) through a bearing.

3. An automatic tightening robot according to claim 2, characterized in that: The rotary drive assembly (6) includes a second servo motor (601) fixedly connected to the side of the gantry (2). An active bevel gear (6011) is fixedly connected to the output shaft of the second servo motor (601). A driven gear ring (6012) that works with the active bevel gear (6011) is installed at the edge of the rotary placement seat (301) at the position corresponding to the active bevel gear (6011).

4. An automatic tightening robot according to claim 3, characterized in that: The positioning component (7) includes a mounting cylinder (701) fixedly connected to the inner wall side of the gantry (2). An electromagnet (7011) is installed on the inner wall side of the mounting cylinder (701). A sliding iron block (7012) is slidably arranged on the inner wall of the mounting cylinder (701) corresponding to the position of the electromagnet (7011). A connecting slide rod (7013) is fixedly connected to the side of the sliding iron block (7012). A T-shaped locking block (7014) is fixedly connected to the other end of the connecting slide rod (7013). Several slots (7015) are opened around the edge of the rotating placement seat (301) corresponding to the position of the T-shaped locking block (7014). A spring (7016) is sleeved on the connecting slide rod (7013) located between the T-shaped locking block (7014) and the mounting cylinder (701).

5. An automatic tightening robot according to claim 4, characterized in that: The top of the rotating placement seat (301) is provided with a motor shaft receiving groove (302).

6. An automatic tightening robot according to claim 5, characterized in that: A placement pad (3021) for placing the motor housing is provided on the top of the rotating placement seat (301) and at the position corresponding to the motor shaft receiving groove (302).

7. An automatic tightening robot according to claim 6, characterized in that: The bottom edge of the rotating placement seat (301) is provided with a plurality of equidistant limiting balls (303), and the bottom of the rotating placement seat (301) is rolledly connected to the top of the support platform (1) through the limiting balls (303).

8. An automatic tightening robot according to claim 7, characterized in that: The clamping assembly (4) includes a clamping electric cylinder (401) fixedly connected to the top of the gantry (2), and a clamping plate (4011) is rotatably mounted on the output end of the clamping electric cylinder (401) via a bearing.

9. An automatic tightening robot according to claim 8, characterized in that: The tightening assembly (5) includes an electric push rod (501) fixedly connected to the gantry frame (2), a servo motor (5011) fixedly connected to the output end of the electric push rod (501), and an internal hexagonal sleeve (5012) installed on the output shaft of the servo motor (5011).

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