Power head assembly assembling line and assembling method

Abstract

The invention discloses a power head assembly assembly line, which is used for loading parts into a power head main body, and comprises a conveying device, a grabbing device, a tightening device, an overturning device and other various automatic devices, and through the automatic devices, full-process automation from part carrying and mounting to complete machine detection in the power head assembly assembling process is realized. Manual operation is reduced, and the assembling efficiency is greatly improved. In the assembling process, intelligent equipment such as a tightening device, a press-fitting device and gluing equipment is adopted, high-precision execution of key procedures is ensured, meanwhile, comprehensive quality detection is conducted on the power head assembly in combination with running-in testing and air tightness detection equipment, and assembling defects are prevented from flowing into subsequent procedures or terminal users. The invention further discloses an assembling method of the power head assembly.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery, and in particular to an assembly line and an assembly method of a power head assembly. Background Art

[0002] As a highly efficient pile foundation construction equipment, the power head assembly of the rotary drilling rig is one of the core components, responsible for driving the drill to perform rotary cutting and earth lifting. The power head assembly has a complex structure and includes multiple key components, such as the main shaft, shock absorbing components, gearbox, etc. Its assembly quality directly affects the performance and life of the equipment.

[0003] In the related technology, the power head assembly assembly line mostly adopts a table-type production method. During the production process, the main body of the power head assembly is gradually transported from the conveyor line to a fixed assembly table, and the workers complete the assembly step by step according to the established process flow. After the assembly is completed, it is hoisted to the inspection station for factory inspection.

[0004] Although the above solution has improved assembly efficiency to a certain extent, key processes in the assembly process still rely on manual operations, such as component grabbing and bolt tightening, which cannot guarantee the consistency and accuracy of assembly. At the same time, there is a lack of efficient collaboration between the various assembly units, and the connectivity and continuity between the equipment in the assembly process are insufficient, which limits the overall efficiency of the production line. In addition, the station-based production method is highly fixed and difficult to adapt to the needs of diversified power head assembly models and large-scale production. Summary of the invention

[0005] In view of this, an object of the present invention is to provide a power head assembly assembly line and an assembly method, which can significantly improve assembly efficiency and have high stability.

[0006] The present invention provides a power head assembly line, which is used to load parts into a power head body, and includes a conveying device, a plurality of material racks arranged on one side of the conveying device, and a grasping device, a tightening device, and a flipping device arranged in sequence along the conveying direction of the conveying device; The conveying device is used to convey the power head body and move the parts to the vicinity of the material rack; the grasping device is used to grasp the parts and install the parts on the power head body; the tightening device is used to tighten the bolts connecting the parts and the power head body; the flipping device is used to flip the power head body to facilitate the installation of the parts to the corresponding positions.

[0007] In one embodiment, the conveying device includes a conveying line body, a positioning tray that moves along the conveying direction of the conveying line body and is used to position the power head body, and a transport trolley that can move relative to the conveying line body and is used to transport the power head body components to the conveying line body and the material rack respectively.

[0008] In one embodiment, a positioning and centering device is also included, which includes a positioning frame symmetrically arranged on both sides of the conveyor line body, a positioning plate movably installed on the positioning frame, and a positioning cylinder installed on one end of the positioning frame away from the positioning plate, and the positioning cylinder is transmission-connected to the positioning plate.

[0009] In one embodiment, the grabbing device includes a truss arranged above the conveying device, and a manipulator that can move along the truss for grabbing parts and installing the parts on the power head body. The manipulator is also used to transport the positioning pallet carrying the power head body to the conveying line body and grab the parts from the positioning pallet into the material rack.

[0010] In one embodiment, the flipping device includes a rotating frame arranged above the conveying device for flipping the power head body, a clamping cylinder installed on both sides of the rotating frame, and a clamping frame arranged in the rotating frame and transmission-connected to the clamping cylinder for clamping the power head body.

[0011] In one embodiment, the flipping device also includes a sliding rail installed on the clamping frame, a clamping block slidably arranged on the sliding rail for clamping the power head body, a movable oil cylinder arranged at both ends of the clamping frame and transmission connected to the clamping block, and a guide rod connected to the clamping frame and movably mounted on the rotating frame.

[0012] In one embodiment, it also includes a running-in test device, an air tightness detection device, a press-fit device, a glue coating device, and an oil filling device which are sequentially arranged along the conveying direction of the conveying device; The press-fitting device is used to press-fit the shock-absorbing component onto the power head body, thereby realizing the shock-absorbing function of the power head assembly; the running-in test device and the air-tightness detection equipment are used to perform running-in test and air-tightness detection on the power head body respectively; the gluing equipment is used to gluing the power head body, and the oil filling equipment is used to fill the power head body with oil.

[0013] In one embodiment, the running-in test device includes a lifting and rotating mechanism arranged on one side of the conveying device, a running-in table installed on the lifting and rotating mechanism and capable of lifting and rotating along the lifting and rotating mechanism, a running-in motor arranged on the running-in table for performing a running-in test on the power head main body, and a docking tooling connected to one end of the running-in motor for transmission connection between the running-in motor and the power head main body.

[0014] In one embodiment, it also includes an assembly frame for closing the conveyor line body, and a lifting device arranged on the top of the assembly frame for assisting in lifting parts and a power head body, and the grasping device can be movably mounted on the assembly frame.

[0015] The present invention also provides an assembly method of a power head assembly, including the above-mentioned power head assembly assembly line, and the assembly method includes the following steps: S1. The transport trolley transports the positioning pallet carrying the power head body and parts to the conveyor line and the material rack respectively. The manipulator completes the loading, and the conveyor line transports the positioning pallet carrying the power head body along the conveying direction. S2. The positioning and centering device positions the positioning tray, and the manipulator installs the parts on the power head body. The tightening device installs the bolts and tightens them, completing the installation of the parts. S3, the turning device turns over the power head body, the manipulator installs the parts on the power head body, and the tightening device installs the bolts and tightens them to complete the secondary parts installation; S4. The conveyor line will continue to transport the positioning tray carrying the power head body along the conveying direction, and complete the running-in test, air tightness test, shock-absorbing component pressing, gluing and oiling processes in sequence.

[0016] The power head assembly assembly line provided by the present invention realizes the automation of the whole process from parts handling and installation to whole machine testing in the power head assembly process by integrating various automation equipment such as conveying devices, grasping devices, tightening devices, and flipping devices, thereby reducing the involvement of manual operations and greatly improving the assembly efficiency. Intelligent equipment such as tightening devices, pressing devices, and gluing equipment are used in the assembly process to ensure high-precision execution of key processes. At the same time, the power head assembly is comprehensively inspected for quality in combination with running-in tests and air tightness testing equipment to prevent assembly defects from flowing into subsequent processes or end users. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 An overall layout diagram of a power head assembly line provided for a preferred embodiment of the present invention.

[0019] Figure 2 An overall layout diagram of a power head assembly line provided for a preferred embodiment of the present invention.

[0020] Figure 3 A schematic structural diagram of a positioning and centering device provided for a preferred embodiment of the present invention.

[0021] Figure 4A schematic structural diagram of a gripping device provided in a preferred embodiment of the present invention.

[0022] Figure 5 A schematic structural diagram of a turning device provided in a preferred embodiment of the present invention.

[0023] Figure 6 A schematic structural diagram of a running-in test device provided for a preferred embodiment of the present invention.

[0024] Reference numerals: 1. Conveying device; 2. Grabbing device; 3. Positioning and centering device; 4. Tightening device; 5. Flipping device; 6. Pressing device; 7. Gluing equipment; 8. Oil filling equipment; 9. Assembly frame; 10. Material rack; 11. Lifting equipment; 12. Running-in test device; 101. Transport trolley; 102. Positioning pallet; 201. Truss; 202. Manipulator; 301. Positioning frame; 302. Positioning plate; 303. Positioning cylinder; 501. Rotating frame; 502. Clamping cylinder; 503. Clamping frame; 504. Sliding track; 505. Clamping block; 506. Movable cylinder; 507. Guide rod; 1201. Lifting and rotating mechanism; 1202. Running-in table; 1203. Running-in motor; 1204. Docking tooling. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "install", "connection" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] The directions or positional relationships indicated by terms such as “upper”, “lower”, “left”, “right”, “front”, “back”, “top”, “bottom”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of description and simplified description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0028] The terms "first", "second", "third", etc. are merely used to distinguish elements of similar nature, and do not indicate or imply relative importance or a particular order.

[0029] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0030] Please refer to Figure 1 to Figure 2 A power head assembly line provided in an embodiment of the present invention is used to load parts into a power head body. The assembly line includes a conveying device 1 and assembly stations and inspection and processing stations arranged in sequence along the direction of the conveying device 1. The power head body is transported to the stations in sequence through the conveying device 1, thereby realizing the step-by-step assembly and inspection and processing operations of the power head body.

[0031] Among them, the assembly station includes a grasping device 2, a tightening device 4 and a flipping device 5 in sequence. A plurality of material racks 10 are provided at the assembly station. The plurality of material racks 10 are respectively arranged near the above devices for placing the parts to be assembled, so as to facilitate the grasping device 2 to grasp and install them on the power head body, thereby improving the assembly efficiency. At the same time, the flipping device 5 can flip the power head body so that different parts of it are exposed in the assembly position in sequence, thereby facilitating the precise installation of parts. The tightening device 4 is used to tighten the bolts between the parts and the power head body according to the preset torque to ensure a firm and consistent connection and avoid assembly quality problems caused by substandard torque or over-tightening.

[0032] After the power head body is assembled, it is transported to the inspection and processing station, which includes a running-in test device 12, an airtightness detection device, a press-fit device 6, a glue coating device 7 and an oil filling device 8 in sequence. The power head assembly performs a multi-operation test on the power head body through the running-in test device 12, simulates the operating conditions under the actual working state, verifies the performance and reliability of key components such as gears and bearings, and pressurizes the inside of the power head body and monitors the pressure changes through the airtightness detection device to detect its sealing performance. After passing the test, the press-fit device 6 is used to accurately press the shock-absorbing component onto the power head body, and through the precise control of the press-fitting force and displacement, ensure the reliable connection between the shock-absorbing component and the power head body, thereby realizing the shock-absorbing function of the power head assembly. Then, the glue coating device 7 performs a glue coating operation on the joint surface of the power head body, and achieves uniform glue coating by controlling the glue coating trajectory and glue amount, thereby enhancing the sealing effect of the joint surface. Finally, the hydraulic oil or lubricating oil is quantitatively injected through the oil filling device 8 to meet the lubrication requirements of the power head body.

[0033] As the core and key component of the rotary drilling rig, the power head assembly has extremely high requirements for assembly quality. In order to meet the needs of its positioning accuracy and flexible production, in this embodiment, the conveying device 1 includes a conveying line body and a transport trolley 101. Since the weight of the power head assembly is gradually added during the assembly process, the overall weight is heavy, and the traditional conveying line body is difficult to meet the circulation requirements. Therefore, this embodiment also provides a positioning tray 102 that can move along the conveying direction of the conveying line body. The positioning tray 102 can not only accurately position the power head assembly, but also has sufficient carrying capacity to support the gradually increasing weight of the power head assembly, ensuring the stability and safety of the assembly during the conveying process. At the same time, the positioning tray 102 can also evenly disperse the load of the power head assembly, avoiding structural deformation or damage caused by excessive local load of the conveying line body due to weight concentration, thereby ensuring the stability and long-term service life of the conveying line body. In addition, the transport trolley 101 can move flexibly and is used to transport the power head body and parts to the conveying line body and the material rack 10 respectively. The transport trolley 101 can automatically adjust the transport path according to the positions and assembly requirements of different parts and components to ensure that each component can smoothly reach the corresponding assembly station or rack 10.

[0034] Specifically, the transport cart 101 is an AGV cart. During path planning, magnetic strips can be laid on the route where the AGV cart travels and magnetic sensors can be integrated on the AGV cart. The magnetic sensors can identify the path by detecting the magnetic field, so that the AGV cart can move along the predetermined path.

[0035] In one embodiment, a positioning and centering device 3 is also included, which is located on both sides of the conveyor line body and is composed of a positioning frame 301, a positioning plate 302 and a positioning cylinder 303. Among them, the positioning frame 301 is symmetrically arranged on both sides of the conveyor line body, and the positioning plate 302 can be movably installed on the positioning frame 301, which can be adjusted according to the size or shape of different power head bodies, so that the power head body can be accurately centered to ensure that the power head body is in the correct position during the assembly process. The positioning cylinder 303 is installed at one end of the positioning frame 301 away from the positioning plate 302, and is connected to the positioning plate 302 in a transmission manner, and is used to provide power to the positioning plate 302, so as to quickly complete the accurate centering of the power head body.

[0036] Preferably, the gripping device 2 includes a truss 201 and a manipulator 202. The truss 201 is arranged above the conveying device 1 to provide support for the entire gripping device 2. The manipulator 202 can move freely along the truss 201, and is mainly used to grab parts and accurately install them on the power head body. It is also used to transport the positioning tray 102 carrying the power head body to the conveyor line body and grab parts from the positioning tray 102 to the material rack 10. The manipulator 202 adopts a flexible movement and gripping method, which can adapt to the assembly requirements of different types of parts. In this embodiment, a visual recognition system can also be integrated on the manipulator 202, so that the manipulator 202 can identify the position and direction of the parts, so as to accurately install the parts on the power head body.

[0037] In this embodiment, the tightening device 4 includes at least one tightening machine, through which the bolts connected between the parts and the power head body can be tightened to ensure the stability of the power head assembly. Further, the tightening device 4 can also include a bolt grabbing mechanism, a visual positioning mechanism and a control system, etc., through which the bolts can be accurately sent to the specified position to avoid position deviation and assembly omission problems in manual operation. At the same time, combined with visual recognition technology, the visual positioning mechanism can automatically detect the position and angle of the bolts and parts, ensure the accurate docking of the bolts during the tightening process, and improve the assembly accuracy. In addition, the tightening machine can also be integrated on the manipulator 202. After the parts are installed, the position and angle of the parts are identified by the visual positioning mechanism, and the manipulator 202 is guided to complete the bolt tightening operation in sequence. When the tightening is completed, the control system can also automatically determine whether the tightening result is qualified. If there is a tightening problem, troubleshooting and adjustment can be carried out in time, and the data in the tightening process can be analyzed and recorded. If the position of the parts is offset, the tightening torque is abnormal, etc., the system can issue an alarm or stop the tightening operation in time.

[0038] In one embodiment, the flipping device 5 includes a rotating frame 501, a clamping cylinder 502 and a clamping frame 503. The rotating frame 501 is arranged above the conveying device 1, and can rotate freely within a certain range, so that the power head body can be flipped according to a predetermined angle. The clamping frame 503 is arranged inside the rotating frame 501 and is connected to the clamping cylinder 502 in a transmission manner, and is used to directly clamp the power head body to ensure that the position of the power head body remains stable during the flipping process. When the power head body enters the flipping station, the clamping cylinder 502 is started, and the clamping frame 503 is driven by hydraulic pressure to firmly clamp the power head body. Subsequently, the rotating frame 501 starts to rotate, pushing the clamping frame 503 to drive the power head body to flip, thereby exposing different parts of the power head body to facilitate the installation of parts.

[0039] Although the clamping of the power head body is achieved by the clamping frame 503 in the above embodiment, during the flipping process, the shape of the power head body is not uniform and the weight of the power head body gradually increases during the assembly process, which may cause the clamping frame 503 to be unable to evenly clamp the power head body in some cases, especially during the flipping process, due to the external force, a slight tilt or displacement may occur. In order to solve this problem, in this embodiment, the flipping device 5 is installed on the sliding track 504 on the clamping frame 503, the clamping block 505 for clamping the power head body is slidably arranged on the sliding track 504, the movable oil cylinder 506 is arranged at both ends of the clamping frame 503 and is transmission-connected to the clamping block 505, and the guide rod 507 connected to the clamping frame 503 and movably installed on the rotating frame 501, and the guide rod 507 can provide guidance for the clamping action of the clamping frame 503 to improve the clamping accuracy. The clamping block 505 can provide additional clamping force during the flipping process to ensure the stable clamping of the power head body. The sliding track 504 enables the clamping block 505 to slide smoothly in the clamping frame 503, so that the clamping block 505 always remains stable during the sliding process, thereby accurately clamping the power head body during the flipping process. Through the auxiliary effect of the clamping block 505, it can effectively prevent its displacement or tilt during the flipping process, ensuring the stability of the flipping process.

[0040] In this embodiment, the running-in test device 12 is arranged on one side of the conveying device 1, and is used to perform a multi-condition running-in test on the power head body, which includes a lifting and rotating mechanism 1201, a running-in table 1202, a running-in motor 1203, and a docking tool 1204. Among them, the running-in table 1202 is installed on the lifting and rotating mechanism 1201, and the height and angle of the running-in table 1202 can be adjusted by the lifting and rotating mechanism 1201 to match the power head body of different sizes. The running-in motor 1203 is installed on the running-in table 1202 to provide operating power for the power head body. The running-in motor 1203 simulates the actual operating conditions of the power head body by outputting torque and speed, so that its key components (such as gears, bearings, etc.) are tested under a close to real working state to verify its operating performance and stability. The docking fixture 1204 is connected to one end of the running-in motor 1203, and is used to connect the running-in motor 1203 with the input end of the power head body through transmission (such as key connection), to ensure that the power can be efficiently and stably transmitted to the power head body, so as to achieve the smooth progress of the running-in test. During the running-in process, a slight and uniform meshing sound is allowed, and there should be no irregular and violent noise.

[0041] In order to further optimize the structure and function of the assembly line, in this embodiment, the assembly line also includes an assembly frame 9 and a lifting device 11. The assembly frame 9 is used to close the conveyor line body to form an independent assembly area, limit the assembly operation to the inside of the frame, reduce the interference of the external environment on the assembly process, such as the influence of dust and noise, so as to provide a good operating environment for the high-precision assembly of the power head assembly. The lifting device 11 is installed on the top of the assembly frame 9 to assist in lifting parts and the power head body. The lifting device 11 can efficiently place heavy parts or power head bodies on the conveyor line body or the corresponding assembly position through flexible lifting operations, reduce the labor intensity of manual handling, and improve assembly efficiency and safety. The grabbing device 2 can be movably mounted on the assembly frame 9. Through this installation method, the grabbing device 2 can achieve a larger range of activities in the assembly frame 9, adapt to the assembly requirements of different parts, and further improve assembly flexibility and efficiency.

[0042] The embodiment of the present invention further provides an assembly method of a power head assembly, including the above-mentioned power head assembly line, and the assembly method includes the following steps: S1. The transport trolley 101 transports the positioning tray 102 carrying the power head body and parts to the vicinity of the conveyor line and the material rack 10 respectively, and the manipulator 202 completes the loading, and the conveyor line transports the positioning tray 102 carrying the power head body along the conveying direction; S2, the positioning and centering device 3 positions the positioning tray 102, the manipulator 202 installs the parts on the power head body, and the tightening device 4 installs the bolts and tightens them, completing the installation of the parts; S3, the turning device 5 turns over the power head body, the manipulator 202 installs the parts on the power head body, and the tightening device 4 installs the bolts and tightens them to complete the secondary parts installation; S4. The conveyor line body continues to transport the positioning tray 102 carrying the power head body along the conveying direction, and completes the running-in test, air tightness test, shock-absorbing component press-fitting, gluing and oiling processes in sequence.

[0043] The specific workflow of the present invention is as follows: At the beginning of assembly, the transport trolley 101 transports the positioning tray 102 carrying the power head body and parts to the vicinity of the conveyor line and the rack 10. The manipulator 202 grabs the parts from the rack 10 and installs them on the power head body. At the same time, the conveyor line starts and transports the positioning tray 102 carrying the power head body to the designated workstation along the conveying direction.

[0044] After the power head body arrives at the assembly station, the positioning and centering device 3 accurately positions the power head body on the positioning tray 102 to ensure stability and accuracy during the assembly process. The manipulator 202 installs the parts to the specified position of the power head body, and the tightening device 4 then completes the installation and tightening of the bolts to ensure a firm connection between the parts and the power head body, completing a parts installation.

[0045] The flipping device 5 flips the power head body to expose the other side or other parts of the power head body to the assembly station. The manipulator 202 grabs the parts again and installs them on the power head body. The tightening device 4 installs and tightens the bolts again to complete the secondary parts installation and ensure the comprehensiveness of the parts assembly of each part of the power head body.

[0046] After the installation of the parts is completed, the conveyor line continues to transport the positioning tray 102 carrying the power head body, and passes through the running-in test device 12, the press-fit device 6, the glue coating device 7 and the oil filling device 8 in turn. The power head body undergoes multi-condition testing in the running-in test device 12 to verify the operating performance and reliability of key components such as gears and bearings, and accurately press-fits the shock-absorbing components at the press-fit device 6 to ensure the stability of the shock-absorbing function. Then, the glue coating device 7 is used to coat the joint surface of the power head body to improve the sealing effect of the joint surface. Finally, the filling device is used to inject hydraulic oil or lubricating oil into the power head body to meet the subsequent operating requirements.

[0047] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A power head assembly line, used to install parts into the power head body, characterized in that: It comprises a conveying device (1), a plurality of material racks (10) arranged on one side of the conveying device (1), and a grasping device (2), a tightening device (4), and a flipping device (5) arranged in sequence along the conveying direction of the conveying device (1); The conveying device (1) is used to convey the power head body and to carry the parts to the vicinity of the material rack (10); the grasping device (2) is used to grasp the parts and to install the parts on the power head body; the tightening device (4) is used to tighten the bolts connecting the parts and the power head body; the flipping device (5) is used to flip the power head body, thereby facilitating the installation of the parts to the corresponding positions.

2. The assembly line according to claim 1, characterized in that: The conveying device (1) comprises a conveying line body, a positioning tray (102) that moves along the conveying direction of the conveying line body and is used to position the power head body, and a transport trolley (101) that can move relative to the conveying line body and is used to transport the power head body components to the vicinity of the conveying line body and the material rack (10), respectively.

3. The assembly line according to claim 1, characterized in that: The invention also comprises a positioning and centering device (3), wherein the positioning and centering device (3) comprises positioning frames (301) symmetrically arranged on both sides of the conveyor line body, a positioning plate (302) movably mounted on the positioning frames (301), and a positioning cylinder (303) mounted on one end of the positioning frame (301) away from the positioning plate (302), wherein the positioning cylinder (303) is drivingly connected to the positioning plate (302).

4. The assembly line according to claim 2, characterized in that: The gripping device (2) comprises a truss (201) arranged above the conveying device (1), and a manipulator (202) capable of moving along the truss (201) and used to grip parts and install the parts on the power head body. The manipulator (202) is also used to transport a positioning tray (102) carrying the power head body to the conveying line body and to grip parts from the positioning tray (102) to the material rack (10).

5. The assembly line according to claim 1, characterized in that: The flipping device (5) comprises a rotating frame (501) arranged above the conveying device (1) and used to flip the power head body, a clamping cylinder (502) installed on both sides of the rotating frame (501), and a clamping frame (503) arranged in the rotating frame (501) and drivingly connected to the clamping cylinder (502) and used to clamp the power head body.

6. The assembly line according to claim 5, characterized in that The turning device (5) further comprises a sliding rail (504) mounted on the clamping frame (503), a clamping block (505) slidably mounted on the sliding rail (504) for clamping the power head body, a movable oil cylinder (506) disposed at both ends of the clamping frame (503) and drivingly connected to the clamping block (505), and a guide rod (507) connected to the clamping frame (503) and movably mounted on the rotating frame (501).

7. The assembly line according to claim 1, characterized in that: It also includes a running-in test device (12), an air tightness detection device, a press-fitting device (6), a glue coating device (7), and an oil filling device (8) which are sequentially arranged along the conveying direction of the conveying device (1); The press-fitting device (6) is used to press-fit the shock-absorbing component onto the power head body, thereby realizing the shock-absorbing function of the power head assembly; the running-in test device (12) and the air-tightness detection device are used to perform a running-in test and an air-tightness detection on the power head body, respectively; the glue coating device (7) is used to coat the power head body with glue, and the oil filling device (8) is used to fill the power head body with oil.

8. The assembly line according to claim 7, characterized in that The running-in test device (12) comprises a lifting and rotating mechanism (1201) arranged on one side of the conveying device (1), a running-in table (1202) installed on the lifting and rotating mechanism (1201) and capable of being lifted and rotated along the lifting and rotating mechanism (1201), a running-in motor (1203) arranged on the running-in table (1202) for performing a running-in test on the power head body, and a docking tool (1204) connected to one end of the running-in motor (1203) for transmission connection between the running-in motor (1203) and the power head body.

9. The assembly line according to claim 1, characterized in that: It also includes an assembly frame (9) for closing the conveyor line body, and a lifting device (11) arranged on the top of the assembly frame (9) for assisting in lifting parts and a power head body, wherein the gripping device (2) is movably mounted on the assembly frame (9).

10. A method for assembling a power head assembly, characterized in that: The power head assembly line according to any one of claims 1 to 9 is included, and the assembly method comprises the following steps: S1, the transport trolley (101) transports the positioning tray (102) carrying the power head body and parts to the vicinity of the conveyor line and the material rack (10), and the manipulator (202) completes the loading, and the conveyor line transports the positioning tray (102) carrying the power head body along the conveying direction; S2, the positioning and centering device (3) positions the positioning tray (102), the manipulator (202) installs the parts on the power head body, and the tightening device (4) installs the bolts and tightens them, completing the installation of the parts; S3, the turning device (5) turns over the power head body, the manipulator (202) installs the parts on the power head body, and the tightening device (4) installs the bolts and tightens them, completing the secondary parts installation; S4. The conveyor line body continues to transport the positioning tray (102) carrying the power head body along the conveying direction, and sequentially completes the running-in test, air tightness test, shock-absorbing component press-fitting, gluing and oiling processes.

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