Parallel assembly fixture for motor end cover

Abstract

The utility model provides a motor end cover parallel assembly clamp, and belongs to the technical field of motor installation auxiliary equipment. A positioning plate is arranged above the base, a baffle is arranged on the outer edge of the positioning plate, a nut positioning pin is arranged above the positioning plate, and an end cover positioning pin is arranged above the base; the edge of one side of the base is connected with a positioning rod, the positioning rod is provided with a positioning block for a shaft, the motor matched with the assembly fixture for use comprises an upper end cover, a lower end cover and a machine base, and the upper end cover and the lower end cover are provided with positioning rings matched with the positioning rod. The lower end cover is initially positioned through the baffle, the end cover positioning pin and the nut positioning pin, the positioning ring is matched with the positioning rod to enable the upper end cover and the lower end cover of the motor to be kept perpendicular to the positioning rod, the motor end cover parallel assembly fixture body is used at an inclined angle, and parallel installation of the upper end cover and the lower end cover can be kept as well. And the traditional mode of controlling the parallelism of the upper and lower end covers by using bolts is avoided, and the parallel state is prevented from being interfered by fastening of the bolts and nuts.

Description

Technical Field

[0001] The present application belongs to the technical field of motor installation auxiliary equipment, and more specifically, relates to a parallel assembly fixture for motor end covers. Background Art

[0002] The motor end cover is an important part of the motor. In addition to preventing dust, moisture, corrosive substances and other physical damage in the external environment from invading the internal parts of the motor, it is usually used to fix the internal accessories of the motor, such as the stator, rotor, bearings, etc. Therefore, if the motor end cover is not installed in parallel, it will cause vibration and noise during the operation of the motor, affecting the service life of the motor. This is because when the motor rotor rotates at high speed, if the end cover is not installed in parallel, the rotation center of the rotor will not coincide with the center line of the motor housing. This mechanical imbalance will cause additional centrifugal force when the motor is running, causing vibration. The non-parallel installation of the end cover will cause the bearing to be unevenly loaded, resulting in relative movement between the inner and outer rings of the bearing. This movement will not only aggravate the wear of the bearing, but also generate noise. In addition, it will also cause resonance, internal component friction and other effects.

[0003] In order to keep the motor end cover parallel, the following solutions are proposed in the prior art:

[0004] The Chinese utility model patent with publication number CN218747171U is used for the parallel positioning tooling of the servo motor end cover assembly, which discloses aligning the installation threaded hole with the long bolt, using the rebound push spring to continue to push the rear end cover, so that the long bolt is inserted into the installation threaded hole, and the positioning of the rear end cover and the long bolt is completed, so that the electromagnet stops working, so that the rear end cover loses the fixation of the electromagnet, and then the push shell is pulled away from the support plate, so that the rear end cover is only supported by the long bolt, and the long bolt is fixed by the nut matching the long bolt, so that the installation positioning of the rear end cover can be completed. This scheme is essentially to complete the parallel installation of the motor end cover by positioning the threaded hole and the bolt, and using the bolt.

[0005] A similar solution is the Chinese utility model patent with publication number CN211414908U, which discloses a parallel positioning tool for assembling motor end covers, which discloses setting coaxial positioning holes on the front cover, the rear cover and the tool, and completing the parallel installation of the end covers by connecting with bolts.

[0006] However, the prior art relies on bolts connecting the front and rear end covers or connecting one end cover alone to achieve parallel installation of the motor end covers, and the improvement measures focus on how to position the bolts and the end covers, ignoring the impact caused by the bolts locking the end covers.

[0007] Specifically, there are two main problems in bolt positioning: 1. If the bolts are installed blindly for tightening, it will cause local deformation of the bolts, end covers and gaskets; 2. If the bolts are tightened symmetrically or simultaneously, and the tightening force of the bolts is controlled, the parallelism of the motor end cover installation tooling cannot be guaranteed. The tightening amounts of each bolt are different, the force is uneven, and the parallelism of the motor end cover installation is affected. Summary of the invention

[0008] In order to solve the above problems, the present application provides a parallel assembly fixture for motor end covers, including a base; a positioning plate is arranged above the base, and baffles higher than the positioning plate are intermittently arranged on the outer edge of the positioning plate, a nut positioning pin is arranged above the positioning plate, and an end cover positioning pin is arranged above the base; a positioning rod with an axial direction perpendicular to the upper surface of the base is connected to the edge of one side of the base, and an axial positioning block perpendicular to the axial direction of the positioning rod is arranged at the end of the positioning rod away from the base, and the motor used in conjunction with the parallel assembly fixture for motor end covers includes an upper end cover, a lower end cover and a base, and the upper end cover and the lower end cover are provided with positioning rings that cooperate with the positioning rod.

[0009] Preferably, a base baffle plate perpendicular to the upper surface of the base is arranged at the edge of the base, and a positioning sleeve is installed on the positioning plate, and the positioning sleeve is made of a polymer material.

[0010] Preferably, a pressure block is arranged above the shaft positioning block, and a level is arranged above the pressure block.

[0011] Preferably, it also includes a glue overflow device that can be mounted on the upper end cover, a glue storage tank is arranged inside the glue overflow device, an overflow port is arranged around the upper end cover on one side of the glue storage tank facing the upper end cover, a glue discharge port is opened at the bottom of the glue storage tank, the glue discharge port is connected to a pumping device through a glue delivery pipe, and a liquid level sensor is arranged inside the glue storage tank.

[0012] Preferably, a heating device is provided in the glue overflow device, a plurality of overflow sensors are evenly distributed circumferentially at the overflow port to detect the overflow position of the glue, and a height adjustment component is provided below the base at a position corresponding to the nut locating pin.

[0013] Preferably, a guide groove is provided below the glue overflow device, and the end of the guide groove is opposite to the junction between the upper end cover and the machine base.

[0014] Preferably, an automatic bolt tightening device is provided at a position on the side wall of the pressing block corresponding to the nut locating pin, and the automatic bolt tightening device includes a connecting rod, a multi-purpose sleeve and an actuator.

[0015] Preferably, the automatic bolt tightening device is provided with a mechanical sensor capable of detecting in real time the resistance encountered by the automatic bolt tightening device during operation.

[0016] Preferably, it also includes a control system, which can receive signals from the liquid level sensor, the overflow sensor and the mechanical sensor, and control the actions of the height adjustment component and the automatic bolt tightening device.

[0017] The present application also provides a method for parallel assembly of motor end covers, comprising the following steps:

[0018] The lower end cover, base and upper end cover of the motor to be assembled are loaded into the parallel assembly fixture of the motor end cover. The parallel assembly fixture of the motor end cover includes a base, a positioning plate is arranged above the base, and baffles higher than the positioning plate are intermittently arranged on the outer edge of the positioning plate. A nut positioning pin is arranged above the positioning plate, and an end cover positioning pin is arranged above the base; a positioning rod whose axial direction is perpendicular to the upper surface of the base is connected to the edge of one side of the base, and an axial positioning block perpendicular to the axial direction of the positioning rod is arranged at one end of the positioning rod away from the base. The motor used in conjunction with the parallel assembly fixture of the motor end cover includes an upper end cover, a lower end cover and a base, and the upper end cover and the lower end cover are provided with positioning rings that match the positioning rod;

[0019] Load the nut on the nut locating pin, and determine the position of the lower end cover through the end cover locating pin, baffle and locating plate, and then load the machine base and upper end cover in turn. The upper end cover and the lower end cover are provided with locating rings. The locating rod with the shaft locating block is passed through the locating rings of the upper end cover and the lower end cover in turn and then installed on the base, so that the lower surface of the shaft locating block is parallel to the outer contour of the upper surface of the upper end cover, and then insert the bolt from the upper end cover, through the machine base and the lower end cover to the nut and tighten it to complete the assembly.

[0020] The beneficial effects of this application are:

[0021] 1. The lower end cover is initially positioned by the baffle, the end cover positioning pin and the nut positioning pin, and then the machine base and the upper end cover are loaded. The positioning rod is perpendicular to the base and the shaft positioning block, and the base and the shaft positioning block are kept parallel to each other. The upper and lower end covers loaded on the motor end cover parallel assembly fixture are kept parallel to each other by the base and the shaft positioning block. At the same time, the upper and lower end covers of the motor are provided with positioning rings that cooperate with the positioning rod to keep the upper and lower end covers of the motor and the positioning rod in a vertical state. Even if the motor end cover parallel assembly fixture body is used at an inclined angle, the upper and lower end covers can still be installed in parallel, and the traditional method of using bolts to control the parallelism of the upper and lower end covers is avoided, and the parallel state is prevented from being disturbed by the tightening of bolts and nuts;

[0022] 2. The vertical position of the base and the base is maintained by the base baffle perpendicular to the upper surface of the base, and the lower end cover, base and upper end cover are controlled to be parallel to each other;

[0023] 3. When loading the motor end cover, the glue overflow device is used to measure the micro-deflection direction of the motor's overall structure during the motor end cover assembly process, and the height adjustment assembly provided under the base is used to adjust the base and the overall direction of the motor so that the upper end cover of the motor remains horizontal. The tightening stroke of the automatic bolt tightening device is then kept consistent so that the upper and lower end covers of the motor are tightened in a parallel state. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments or the prior art description:

[0025] Figure 1 It is a three-dimensional schematic diagram of the parallel assembly fixture of the motor end cover of the present application;

[0026] Figure 2 It is a top view of the parallel assembly fixture of the motor end cover of the present application;

[0027] Figure 3 yes Figure 2 AA section view;

[0028] Figure 4 This is a three-dimensional diagram of the glue overflow device of the present application;

[0029] Figure 5 This is a bottom view of the glue overflow device of the present application;

[0030] Figure 6 This is a top view of the glue overflow device of the present application;

[0031] Figure 7 yes Figure 6 AA section view;

[0032] Figure 8 It is a schematic diagram of the diversion trough of this application;

[0033] Fig. 9 It is a three-dimensional schematic diagram of the automatic bolt tightening device of the present application;

[0034] Fig.10 This is a three-dimensional schematic diagram of the motor end cover parallel assembly fixture loading the motor of the present application (viewed from above);

[0035] Fig.11 This is a three-dimensional schematic diagram of the motor end cover parallel assembly fixture loading the motor in this application (viewed from below).

[0036] Description of reference numerals:

[0037] 1. Base; 2. Positioning plate; 3. Positioning block for shaft; 4. Positioning rod; 5. Positioning sleeve; 6. Pressure block; 7. Nut positioning pin; 8. End cover positioning pin; 9. Machine base baffle; 10. Upper end cover; 11. Lower end cover; 12. Machine base; 13. Glue overflow device; 14. Glue storage tank; 15. Overflow port; 16. Glue discharge port; 17. Multi-purpose sleeve; 18. Actuator; 19. Baffle; 20. Positioning ring; 21. Height adjustment assembly; 22. Guide groove; 23. Automatic bolt tightening device; 24. Connecting rod. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] Example 1

[0041] like Figure 1 , Figure 2 , Fig.10 and Fig.11 As shown, a parallel assembly fixture for motor end covers comprises a base 1; a positioning plate 2 is arranged above the base 1, baffles 19 higher than the positioning plate 2 are intermittently arranged on the outer edge of the positioning plate 2, a nut positioning pin 7 is arranged above the positioning plate 2, and an end cover positioning pin 8 is arranged above the base 1; a positioning rod 4 whose axial direction is perpendicular to the upper surface of the base 1 is connected to the edge of one side of the base 1, and an axial positioning block 3 perpendicular to the axial direction of the positioning rod 4 is arranged at one end of the positioning rod 4 away from the base 1; the motor used in conjunction with the parallel assembly fixture for motor end covers comprises an upper end cover 10, a lower end cover 11 and a base 12, and the upper end cover 10 and the lower end cover 11 are provided with positioning rings 20 matched with the positioning rod 4.

[0042] The nut is loaded on the nut locating pin 7, and the lower end cover 11 is positioned by the end cover locating pin 8, the baffle 19 and the locating plate 2, and then the machine base 12 and the upper end cover 10 are loaded in sequence. The upper end cover 10 and the lower end cover 11 are provided with locating rings 20, and the locating rod 4 provided with the shaft locating block 3 is successively passed through the locating rings 20 of the upper end cover 10 and the lower end cover 11 and then installed on the base 1, so that the lower surface of the shaft locating block 3 is parallel to the outer contour of the upper surface of the upper end cover 10, and then the bolt is inserted from the upper end cover 10, through the machine base 12 and the lower end cover 11 until the nut is tightened to complete the assembly.

[0043] The lower end cover 11 is initially positioned by the baffle 19, the end cover locating pin 8 and the nut locating pin 7, and then the machine base 12 and the upper end cover 10 are loaded. The positioning rod 4 is perpendicular to the base 1 and the shaft positioning block 3, and the base 1 and the shaft positioning block 3 are kept parallel to each other. The upper and lower end covers loaded on the motor end cover parallel assembly fixture are kept parallel to each other by the base 1 and the shaft positioning block 3. At the same time, the upper end cover 10 and the lower end cover 11 of the motor are provided with a positioning ring 20 to cooperate with the positioning rod 4 to keep the upper end cover 10 and the lower end cover 11 of the motor in a vertical state with the positioning rod 4. Even if the motor end cover parallel assembly fixture body is used at an inclined angle, the upper and lower end covers can still be maintained in parallel installation, and the traditional method of using bolts to control the parallelism of the upper and lower end covers is avoided, and the parallel state is avoided from being disturbed by the tightening of bolts and nuts.

[0044] Further, Figure 1 , Figure 2 , Fig.10 and Fig.11 As shown, a base baffle 9 perpendicular to the upper surface of the base 1 is provided at the edge of the base 1, and a positioning sleeve 5 is installed on the positioning plate 2, and the positioning sleeve 5 is made of polymer material. The base baffle 9 cooperates with the base 12 to keep the side of the base 12 at a vertical angle relative to the base 1, so that the upper and lower surfaces of the base 12 are parallel to the base 1. During the assembly process of the upper and lower end covers of the motor, the upper end cover 10 and the lower end cover 11 cooperate with the positioning rod 4 through the positioning ring 20 to maintain a parallel state relative to the base 1, but because the upper and lower end covers are both connected to the base, their parallelism is also affected by the base 12. Making the upper and lower surfaces of the base 12 parallel to the upper and lower end covers can further improve the assembly parallelism.

[0045] The positioning sleeve 5 covers the upper surface of the positioning plate 2, providing a buffer for the lower end cover 11 to prevent the end cover from being damaged during the assembly process, and also provides a shock-absorbing effect for the assembly process. In the present embodiment, the positioning sleeve 5 is made of polytetrafluoroethylene. The positioning sleeve 5 made of polytetrafluoroethylene has strong wear resistance, long service life, low hardness and good buffering effect. As a feasible alternative, other polymer materials such as polypropylene can be selected. Although the selection of a material with lower hardness to prepare the positioning sleeve can provide good protection and buffering effects, too low a hardness will affect the supporting capacity and cannot meet the use requirements of parallel installation of the end covers.

[0046] Furthermore, if Fig.10 As shown, a pressure block 6 is arranged above the shaft positioning block 3, and a level meter is arranged above the pressure block 6. The pressure block 6 is directly pressed on the upper surface of the upper end cover 10 during use, which can balance the force during the motor assembly process and reduce the vibration caused by the bolt assembly. Before use, the pressure block 6 is mounted on the shaft positioning block 3, and the contact surface between the pressure block 6 and the shaft positioning block 3 is parallel to the upper surface of the pressure block 6. At this time, the level meter arranged above the pressure block 6 reflects the level of the motor end cover parallel assembly fixture as a whole. When in use, the pressure block 6 can be separated from the shaft positioning block 3, and at this time, the level meter above the pressure block 6 reflects the level of the motor end cover.

[0047] Furthermore, if Figure 4-Figure 8 As shown, it also includes a glue overflow device 13 that can be sleeved on the upper end cover 10, a glue storage tank 14 is arranged inside the glue overflow device 13, and an overflow port 15 is arranged around the upper end cover 10 on the side of the glue storage tank 14 facing the upper end cover 10, a glue discharge port 16 is opened at the bottom of the glue storage tank 14, and the glue discharge port 16 is connected to a pumping device through a glue delivery pipe, and a liquid level sensor is arranged inside the glue storage tank 14.

[0048] When in use, the glue is delivered to the glue storage tank 14 by a pumping device, and the glue delivery process sequentially passes through the pumping device, the glue delivery pipe, the glue discharge port 16 to the glue storage tank 14. When the glue is discharged after the motor end cover is assembled, the glue delivery process is reversed. Considering that the glue overflow device 13 can be used in an inclined state, a liquid level sensor is arranged on a side of the glue storage tank 14 away from the glue discharge port 16 to detect the height of the liquid in the glue storage tank 14. When the liquid height in the glue storage tank 14 reaches the overflow port 15, it can be used.

[0049] Furthermore, if Figure 1-Figure 7 and Fig.11 As shown, a heating device is provided in the glue overflow device 13, a plurality of overflow sensors are evenly distributed circumferentially at the overflow port 15 to detect the overflow position of the glue, and a height adjustment component 21 is provided below the base 1 at the position corresponding to the nut locating pin 8.

[0050] In order to adapt to a variety of glue liquids and expand the application scope of the glue overflow device 13, a heating device is arranged in the glue overflow device 13. When in use, the temperature inside the glue storage tank 14 is increased by the heating device to reduce the viscosity of the glue liquid and make it easier to flow out. In this embodiment, the overflow sensor is arranged at the lower outer edge of the overflow port opening and is laid in a strip shape to detect the position where the glue liquid flows out. As a feasible implementation method, the overflow sensor is a temperature sensor, a conductivity meter or an infrared sensor. The temperature sensor can use the temperature difference between the glue liquid and the air to detect whether the glue liquid flows out. Although the glue overflow device 13 without a heating device can also be used, it is more suitable for the glue overflow device 13 with a heating device from the perspective of sensitivity. The conductivity meter can determine whether the glue liquid has flowed out by the change in conductivity, and the infrared sensor is the most practical because its installation position can be set at the upper edge of the overflow port 15 opening to avoid being covered by dried glue after use.

[0051] The advantage of combining the glue overflow device 13 with the overflow sensor is that the overall weight of the motor is usually large. Compared with the weight of the motor, the slight tilt caused during the tightening of the bolts is difficult to be detected by the accelerometer, while the glue overflow device 13 can reflect the tilt of the motor end cover through the outflow of glue, and has a high detection sensitivity. When the tilt is detected, the height adjustment device 21 arranged under the base 1 is adjusted to keep the motor end cover parallel assembly fixture in a horizontal state as a whole. Based on the base 1, the positioning rod 4 and other components, the upper and lower end covers and the base 12 of the loaded motor are also kept in a horizontal state, which is beneficial to the parallel assembly of the motor end covers.

[0052] Furthermore, if Figure 7 , Figure 8 and Fig.10 As shown, a guide groove 22 is provided below the glue overflow device 13, and the end of the guide groove 22 is opposite to the joint of the upper end cover 10 and the machine base 12. The overflowed glue flows to the joint of the upper end cover 10 and the machine base 12 through the guide groove 22, so that the glue adheres to this position, and the amorphous characteristics of the glue before drying are used to further improve the flatness of the contact surface between the upper end cover 10 and the machine base 12.

[0053] Preferably, Figure 1 , Figure 2 , Fig. 9 and Fig.10As shown, an automatic bolt tightening device 23 is provided at the position of the nut locating pin 7 on the side wall of the pressing block 6, and the automatic bolt tightening device 23 includes a connecting rod 24, a multi-purpose sleeve 17 and an actuator 18. In order to effectively control the mechanical balance of the bolt tightening process, the automatic bolt tightening device 23 is used to tighten the bolts. When the upper and lower end covers of the motor are completely parallel, the tightening of each bolt is carried out simultaneously and the stroke is kept consistent, thereby avoiding the influence of factors such as different tightening degrees and local deformation during the bolt tightening process, and improving the parallelism of the end cover assembly. The automatic bolt tightening device 23 is installed on the side wall of the pressing block 6, and extends to the position directly opposite to the nut locating pin 7 through the connecting rod 24, that is, directly above the bolt, and is provided with a multi-purpose sleeve 17 to install different actuators 18 to improve the application range of the automatic bolt tightening device 23. In this embodiment, the automatic bolt tightening device 23 is loaded with an external hexagonal screwdriver through the multi-purpose sleeve 17, and actuators 18 of different specifications are selected according to the shape of the bolt.

[0054] Furthermore, if Fig. 9 As shown, the automatic bolt tightening device 23 is provided with a mechanical sensor capable of detecting the resistance encountered by the automatic bolt tightening device 23 in real time during operation. As a parallel assembly method of the motor end cover different from controlling the bolt stroke, the present application proposes to receive the force condition of the automatic bolt tightening device 23 through a mechanical sensor, and adjust the tightening process of each bolt according to the force, so that each bolt is subjected to the same force during the tightening process, thereby avoiding different tightening degrees of each bolt and the end cover tilting to the side with a higher tightening degree.

[0055] Furthermore, if Figure 9-11 The control system is also shown, and the control system can receive signals from the liquid level sensor, the overflow sensor and the mechanical sensor, and control the actions of the height adjustment component 21 and the automatic bolt tightening device 23. The control system completes the overall control of the motor assembly process, realizes high-precision automatic motor assembly, and improves the parallelism of the motor end cover assembly.

[0056] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A parallel assembly fixture for motor end covers, comprising a base, characterized in that: A positioning plate is arranged above the base, and baffles higher than the positioning plate are intermittently arranged on the outer edge of the positioning plate, a nut positioning pin is arranged above the positioning plate, and an end cover positioning pin is arranged above the base; a positioning rod whose axial direction is perpendicular to the upper surface of the base is connected to the edge of one side of the base, and an axial positioning block perpendicular to the axial direction of the positioning rod is arranged at one end of the positioning rod away from the base, and the motor used in conjunction with the motor end cover parallel assembly fixture comprises an upper end cover, a lower end cover and a machine base, and the upper end cover and the lower end cover are provided with positioning rings that cooperate with the positioning rod.

2. The parallel assembly fixture for motor end covers according to claim 1, characterized in that: A base baffle plate perpendicular to the upper surface of the base is arranged at the edge of the base, and a positioning sleeve is installed on the positioning plate, and the positioning sleeve is made of a polymer material.

3. The parallel assembly fixture for motor end covers according to claim 1, characterized in that: A pressure block is arranged above the shaft positioning block, and a level is arranged above the pressure block.

4. The parallel assembly fixture for motor end covers as claimed in claim 3, characterized in that: It also includes a glue overflow device that can be sleeved on the upper end cover, a glue storage tank is arranged inside the glue overflow device, an overflow port is arranged around the upper end cover on one side of the glue storage tank facing the upper end cover, a glue discharge port is opened at the bottom of the glue storage tank, the glue discharge port is connected to a pumping device through a glue delivery pipe, and a liquid level sensor is arranged inside the glue storage tank.

5. The parallel assembly fixture for motor end covers according to claim 4, characterized in that: A heating device is arranged in the glue overflow device, a plurality of overflow sensors are evenly distributed circumferentially at the overflow port to detect the overflow position of the glue, and a height adjustment component is arranged at the position of the nut locating pin under the base.

6. The parallel assembly fixture for motor end covers according to claim 5, characterized in that: A guide groove is arranged below the glue overflow device, and the end of the guide groove is opposite to the joint between the upper end cover and the machine base.

7. The parallel assembly fixture for motor end covers according to claim 5, characterized in that: An automatic bolt tightening device is arranged at a position of the side wall of the pressing block corresponding to the nut locating pin, and the automatic bolt tightening device comprises a connecting rod, a multi-purpose sleeve and an actuator.

8. The parallel assembly fixture for motor end covers according to claim 7, characterized in that: The automatic bolt tightening device is provided with a mechanical sensor capable of detecting the resistance encountered by the automatic bolt tightening device in real time during operation.

9. The parallel assembly fixture for motor end covers according to claim 8, characterized in that: It also includes a control system, which can receive signals from the liquid level sensor, the overflow sensor and the mechanical sensor, and control the actions of the height adjustment component and the automatic bolt tightening device.

Images