A pump housing assembling mechanism for water pump assembly

Abstract

The application discloses a pump shell assembling mechanism for water pump assembly. It belongs to the technical field of water pump assembly and comprises a workbench, characterized in that an annular conveying device is arranged at the top center of the workbench, and a feeding station, a first fixing station, a sealing ring assembling station, a pump shell assembling station, a second fixing station and a discharging station are sequentially arranged around the conveying path of the annular conveying device on the workbench. The application solves the problems of low efficiency, strong dependence on manual work and unstable quality in the prior art by means of the innovative annular conveying layout, automatic material transfer, precise sealing ring assembly and reliable fixing mechanism, and realizes the automation and intelligent upgrading of the water pump shell assembling process.

Description

Technical Field

[0001] This invention relates to the field of water pump assembly technology, and in particular to a pump casing assembly mechanism for water pump assembly. Background Technology

[0002] In water pump assembly, assembling the pump casing on the outside of the turbine end cover is one of the key processes. During the assembly of the pump casing, multiple assembly steps are performed in sequence, such as fixing the turbine end cover to the water pump motor housing, assembling the sealing ring, assembling the pump casing, and fixing the pump casing. The traditional process usually relies on multiple independent workstations and a large amount of manual operation. The assembly and fixing steps, such as fixing the turbine end cover to the water pump motor housing, assembling the sealing ring, assembling the pump casing, and fixing the pump casing, are performed manually or semi-automatically.

[0003] This discrete assembly method has the following obvious drawbacks: The flow between processes relies on manual handling or simple conveying, resulting in poor positioning consistency, which can easily lead to mis-assembly or damage of parts, and also requires a large amount of space. Manual assembly is inefficient, labor-intensive, and difficult to meet the needs of large-scale production; Manually handling the seal and assembling the sealing ring can easily lead to improper assembly or damage to the sealing ring, resulting in substandard assembly quality. Summary of the Invention

[0004] The purpose of this invention is to provide a pump casing assembly mechanism for water pump assembly. Through an innovative annular conveying layout, automated material transfer, precise sealing ring assembly, and reliable fixing mechanism, it comprehensively solves the problems of low efficiency, high reliance on manual labor, and unstable quality in the prior art, and realizes the automation and intelligent upgrade of the water pump casing assembly process.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A pump casing assembly mechanism for water pump assembly includes a workbench, with an annular conveying device arranged at the center of the top of the workbench. The conveying path of the annular conveying device on the workbench is sequentially arranged with a loading station, a first fixed station, a sealing ring assembly station, a pump casing assembly station, a second fixed station, and a unloading station. The output end of the annular conveyor is provided with multiple placement mechanisms at equal intervals, and the placement mechanism includes a first placement platform and a second placement platform. The first placement platform is located inside the conveying path of the annular conveyor and is used to place the pump casing. The pump casing is then conveyed to the pump casing assembly station for assembly along with the annular conveyor. The second placement platform is located outside the conveying path of the ring conveyor and is used to place the semi-finished motor with the turbine end cover assembled through the loading station. As the ring conveyor conveys the motor, it is sequentially transported to the first fixed station, the sealing ring assembly station, the pump housing assembly station, and the second fixed station for assembly and fixation.

[0006] As a further aspect of the present invention: a robotic arm is provided at the front end of the workbench, the robotic arm being used to grip the pump casing on the external tray and place it on a first placement platform at the front end of the loading station.

[0007] As a further aspect of the present invention: the loading station includes a loading conveying device, a loading reversing device, and a loading transfer device; The feeding conveyor is located at the right end of the ring conveyor and is used to convey the semi-finished product motor to the feeding reversing device and the feeding transfer device. The feeding reversing device spans the middle section of the feeding conveyor and is used to reverse the direction of the semi-finished product motor, so that the turbine end cover is in the upper position. The feeding and transfer device spans the left end of the feeding conveyor, located between the feeding reversing device and the second placement platform, and is used to transfer the semi-finished motor after the feeding reversing device is reversed to the second placement platform.

[0008] As a further aspect of the present invention: the first fixed station includes a first fixing device and a first limiting device; The first fixing device is located at the left end of the feeding conveyor device. The first fixing device spans across the upper rear end of the annular conveyor device and fixes the turbine end cover and the motor housing together with fixing bolts. The first limiting device is located at the rear side between the first fixing device and the feeding conveyor device, and is used to limit the fixing bolts when the first fixing device is fixed.

[0009] As a further aspect of the present invention: the sealing ring assembly station includes a sealing ring shifting mechanism, a sealing ring temporary storage platform, and a sealing ring material handling mechanism; The sealing ring shifting mechanism includes a first linear motor, a moving base, and several fitting devices. The moving base is located at the rear end of the annular conveyor at the top of the workbench. The moving base is fixedly installed on the output end of the first linear motor. Several fitting devices are equidistantly arranged at the top of the moving base near one end of the annular conveyor.

[0010] The sealing ring material handling mechanism includes a horizontal frame, a second linear motor, a sealing ring clamping and transferring device, and an expansion-type material handling device. The horizontal frame spans across the left end of the first fixed station at the rear end of the annular conveyor. The second linear motor is mounted on the end face of the horizontal frame near the first fixed device. The sealing ring clamping and transferring device and the expansion-type material handling device are both fixed to the output end of the second linear motor by a lifting device. The sealing ring temporary storage platform is located at the front end of the first linear motor at the right end of the cross frame; The sealing ring clamping and transferring device is used to clamp the sealing ring on the sleeve and transfer it to the sealing ring temporary storage platform; The expansion feeder is used to open and retrieve the sealing ring temporarily stored on the sealing ring storage platform, and to fit the sealing ring onto the sealing part of the turbine end cover.

[0011] As a further aspect of the present invention: the pump casing assembly station includes a second crossbeam, a third linear motor, a second expansion feeder, and a clamping device. The second crossbeam spans the left end of the first crossbeam behind the annular conveyor. The third linear motor is fixedly installed on the end face of the second crossbeam near the first crossbeam. The second expansion feeder is installed on the output end of the third linear motor via a lifting device. It is used to open and pick up the pump casing placed on the first placement platform and place it on the turbine end cover of the semi-finished product motor. The clamping device is fixedly installed at the rear end of the expansion feeder on the output end of the third linear motor and is used to clamp the pump casing.

[0012] As a further aspect of the present invention: the second fixed station includes a second fixing device and a second limiting device; The second fixing device is located at the left end of the second cross frame, and it fixes the pump casing to the turbine end cover on the semi-finished motor with fixing bolts; The second limiting device is located on the rear side between the second crossbeam and the second fixing device, and is used to limit the fixing bolts when the second fixing device is fixed.

[0013] As a further aspect of the present invention: the unloading station includes a fixed frame, a fourth linear motor, and an unloading clamping device; The fixing frame is fixedly installed at the front end of the second fixing device on the top of the workbench; The fourth linear motor is fixedly installed on the end face of the fixed frame near the second fixed device, and is used to drive the material unloading and clamping device to move. The material handling and clamping device is mounted on the output shaft of the fourth linear motor via a lifting device, and is used to clamp the water pump assembled on the second placement table and transport it to the next process.

[0014] Compared with the prior art, the beneficial effects of the present invention are: This invention constructs a highly integrated circular assembly line by setting up a circular conveyor device at the center of the top of the workbench, and sequentially arranging a loading station, a first fixed station, a sealing ring assembly station, a pump housing assembly station, a second fixed station, and a unloading station around its conveying path. This circular layout allows multiple processes, such as fixing the turbine end cover to the motor housing, assembling the sealing ring, assembling the pump housing, and final fixing, to be completed continuously and automatically on the same equipment, completely changing the traditional discrete assembly mode that relies on multiple independent workstations and manual handling. The circular conveyor device ensures the consistency of positioning references between each station, avoiding misassembly, omissions, and damage to parts caused by manual or semi-automatic flow, while significantly reducing the equipment's footprint.

[0015] This invention, through the specific structure of the loading station, including a loading conveyor, a loading reversing device, and a loading transfer device, achieves automatic conveying of semi-finished motors, automatic reversing to ensure the turbine end cap faces upwards, and precise transfer to the second placement platform. Simultaneously, a robotic arm automatically grips the pump casing and places it on the first placement platform. This automated loading and unloading design, combined with the dual placement platform structure where the pump casing is placed on the inner side of the circular conveyor and the semi-finished motor on the outer side, ensures stable and orderly material flow throughout the assembly process, effectively reducing the labor intensity of frequent manual handling of parts and meeting the needs of large-scale production.

[0016] This invention features a sophisticated automated assembly chain at the sealing ring assembly station: a sealing ring transfer mechanism drives a moving seat via a first linear motor to sequentially move sealing rings from multiple fitting devices to the desired position; the sealing ring picking mechanism first uses a sealing ring clamping and transferring device to transfer the sealing ring to a sealing ring storage platform, and then uses an expansion-type picker to pick up the sealing ring by expanding it and accurately fit it onto the sealing part of the turbine end cover. This automated process of transfer, storage, expansion, and fitting completely avoids the damage that may be caused by manual handling of the sealing ring, and the expansion-type picker ensures that the sealing ring is evenly expanded and accurately installed, significantly improving the quality and consistency of sealing ring assembly.

[0017] The pump casing assembly station of this invention uses an expansion-type feeder to open and pick up the pump casing, placing it on the turbine end cover. A clamping device then clamps it in place, ensuring accurate alignment and fit between the pump casing and the semi-finished motor. Subsequently, a second fixing device at the second fixing station, in conjunction with a second limiting device, reliably connects the pump casing and the turbine end cover using fixing bolts. Furthermore, at the first fixing station, when the first fixing device fixes the turbine end cover to the motor housing, the first limiting device limits the fixing bolts, effectively preventing bolt rotation and ensuring the tightness of the threaded connection. The automated design of these two fixing processes ensures the mechanical strength and reliability of the entire pump casing assembly structure.

[0018] In summary, this invention, through its innovative ring conveying layout, automated material transfer, precise sealing ring assembly, and reliable fixing mechanism, comprehensively solves the problems of low efficiency, high reliance on manual labor, and unstable quality in existing technologies, and realizes the automation and intelligent upgrade of the pump casing assembly process. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the annular conveying device of the present invention; Figure 3 This is a schematic diagram of the material loading station structure of the present invention; Figure 4 This is a schematic diagram of the first fixed workstation structure of the present invention; Figure 5 This is a schematic diagram of the sealing ring assembly station structure of the present invention; Figure 6 This is a schematic diagram of the pump casing assembly station structure of the present invention; Figure 7 This is a schematic diagram of the second fixed workstation structure of the present invention; Figure 8 This is a schematic diagram of the material unloading station structure of the present invention.

[0020] The attached figures are labeled as follows: 1. Workbench; 2. Circular conveyor; 3. Loading station; 301. Loading conveyor; 302. Loading reversing device; 303. Loading transfer device; 4. First fixed station; 401. First fixing device; 402. First limiting device; 5. Sealing ring assembly station; 501. Sealing ring shifting mechanism; 501-1. First linear motor; 501-2. Moving seat; 501-3. Fitting device; 502. Sealing ring temporary storage platform; 503. Sealing ring picking mechanism; 503-1. Horizontal frame one; 503-2. Second linear motor; 503-3, sealing ring clamping and transfer device; 503-4, expansion feeder one; 6, pump casing assembly station; 601, crossbeam two; 602, third linear motor; 603, expansion feeder two; 604, clamping device; 7, second fixed station; 701, second fixed device; 702, second limiting device; 8, unloading station; 801, fixed frame one; 802, fourth linear motor; 803, unloading clamping device; 9, placement mechanism; 901, first placement platform; 902, second placement platform; 10, robotic arm. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1-8 As shown, a pump casing assembly mechanism for water pump assembly includes a workbench 1. The workbench 1 serves as the supporting foundation for the entire mechanism, providing a platform for the installation and fixation of all components. A circular conveyor 2 is disposed at the center of the top of the workbench 1. The circular conveyor 2 is used to circulate and transport the materials to be assembled along a preset circular path. Multiple placement mechanisms 9 are equidistantly arranged on the output end of the circular conveyor 2. The circular conveyor 2 can be a circular guide rail type conveyor line or a double-speed chain type circular conveyor line to achieve smooth and precise intermittent or continuous conveying.

[0023] Each placement mechanism 9 includes a first placement platform 901 and a second placement platform 902. The first placement platform 901 is located inside the conveying path of the annular conveyor 2 and is specifically used for placing the pump casing. The second placement platform 902 is located outside the conveying path of the annular conveyor 2 and is specifically used for placing the semi-finished motor with the turbine end cover assembled. This separate arrangement of the inner and outer sides ensures that the pump casing and the semi-finished motor maintain a relatively fixed positional relationship during the conveying process, facilitating subsequent handling and assembly operations at each workstation.

[0024] A robotic arm 10 is installed at the front end of the workbench 1. The robotic arm 10 is used to grip the pump casing to be assembled from the external pallet and accurately place the pump casing on a first placement table 901 at the front end of the loading station 3. The robotic arm 10 typically has four or six degrees of freedom to ensure that it can flexibly and accurately complete the gripping and placement actions.

[0025] The workbench 1 is arranged in sequence around the conveying path of the ring conveyor 2, with a loading station 3, a first fixed station 4, a sealing ring assembly station 5, a pump casing assembly station 6, a second fixed station 7, and a unloading station 8.

[0026] The loading station 3 includes a loading conveyor 301, a loading reversing device 302, and a loading transfer device 303. The loading conveyor 301 is located at the right end of the circular conveyor 2. It transports semi-finished motors from upstream processes to the working range of the loading reversing device 302 and the loading transfer device 303. A linear motor is typically used, and a placement rack is installed at the output end of the loading conveyor 301. The rack has two working positions, one for placing the semi-finished motor before reversal and the other for placing the semi-finished motor after reversal. The loading reversing device 302 spans the middle section of the loading conveyor 301. It performs a reversing operation on the semi-finished motor, rotating the turbine end cap from a downward-facing position to an upward-facing position for subsequent fixing and assembly at subsequent stations. The loading reversing device 302 can employ a lifting and rotating clamping mechanism, which first clamps and lifts the semi-finished motor, then drives it to rotate. The loading and transfer device 303 spans the left end of the loading conveyor 301 and is located between the loading reversing device 302 and the second placement table 902. The loading and transfer device 303 is used to clamp and transfer the semi-finished motor after it has been reversed by the loading reversing device 302 to the second placement table 902. The loading and transfer device 303 may include a linear module, a lifting module, and a pneumatic gripper. The linear module drives the lifting module and the pneumatic gripper to move to the clamping position. Then, the lifting module drives the pneumatic gripper to descend from the working position of the loading conveyor 301 to clamp the reversed semi-finished motor. After successful clamping, it rises, and then the linear module drives the pneumatic gripper to move above the second placement table 902 and place the reversed semi-finished motor on the second placement table 902.

[0027] The first fixed station 4 includes a first fixing device 401 and a first limiting device 402. The first fixing device 401 is located at the left end of the feeding conveyor 301, spanning the upper rear side of the annular conveyor 2. When the placement mechanism 9 carrying the semi-finished motor moves with the annular conveyor 2 to below the first fixing device 401, the first fixing device 401 is activated, fixing the turbine end cover to the motor housing with fixing bolts. The first fixing device 401 can be an automatic screwdriver or an automatic bolt locking device, capable of automatically feeding and screwing the bolts into preset threaded holes. The first limiting device 402 is located at the rear side between the first fixing device 401 and the feeding conveyor 301. When the first fixing device 401 is tightening, the first limiting device 402 extends from the side and limits the fixing bolt, preventing the bolt from rotating during tightening, thereby ensuring the reliability of the fixing and the accuracy of the tightening torque. The first limiting device 402 can drive the cylinder, the limiting plate and the limiting sleeve. Before the automatic screw machine tightens the bolts, the driving cylinder drives the limiting plate and the limiting sleeve to move synchronously to the upper end of the semi-finished motor to be fixed. The limiting sleeve is exactly coaxial with the preset one. Then the fixing bolt will fall from the limiting sleeve to limit the fixing bolt, so as to fix the turbine end cover and the motor housing with high quality.

[0028] The sealing ring assembly station 5 includes a sealing ring shifting mechanism 501, a sealing ring temporary storage platform 502, and a sealing ring picking mechanism 503. The sealing ring shifting mechanism 501 includes a first linear motor 501-1, a moving base 501-2, and several fitting devices 501-3. The moving base 501-2 is located at the rear end of the annular conveyor 2 at the top of the workbench 1, and is fixedly mounted on the output end of the first linear motor 501-1. Several fitting devices 501-3 are equidistantly arranged at the top of the moving base 501-2 near one end of the annular conveyor 2. The fitting devices 501-3 are used to pre-fit the sealing rings to be assembled. The first linear motor 501-1 drives the moving base 501-2 to move in a straight line, thereby sequentially moving each fitting device 501-3 to the working position of the sealing ring picking mechanism 503. The sealing ring temporary storage platform 502 is located at the front end of the first linear motor 501-1 at the right end of the crossbeam 503-1. The sealing ring storage platform 502 is used to temporarily store the sealing rings removed from the fitting device 501-3. The sealing ring picking mechanism 503 includes a crossbeam 503-1, a second linear motor 503-2, a sealing ring gripping and transferring device 503-3, and an expansion-type feeder 503-4. The crossbeam 503-1 spans the left end of the first fixed station 4 at the rear end of the annular conveyor 2. The second linear motor 503-2 is mounted on the end face of the crossbeam 503-1 near the first fixed device 401, and both the sealing ring gripping and transferring device 503-3 and the expansion-type feeder 503-4 are fixed to the output end of the second linear motor 503-2 by a lifting device. The second linear motor 503-2 is used to drive the sealing ring gripping and transferring device 503-3 and the expansion-type feeder 503-4 to move horizontally. The sealing ring gripping and transferring device 503-3 is used to grip the sealing ring from the fitting device 501-3 and transfer it to the sealing ring temporary storage platform 502. The sealing ring gripping and transferring device 503-3 can be a pneumatic gripper or a vacuum suction cup. The expansion-type feeder 503-4 is used to open and retrieve the temporarily stored sealing ring from the sealing ring temporary storage platform 502, and then move and fit the sealing ring onto the sealing part of the turbine end cover. The expansion-type feeder 503-4 has multiple radially expandable flaps at its front end. After being inserted into the inner hole of the sealing ring, it expands radially to open and fix the sealing ring from the inside. After moving to the target position, the flaps retract and reset, and the sealing ring is accurately fitted onto the turbine end cover.

[0029] The pump casing assembly station 6 includes a second crossbeam 601, a third linear motor 602, a second expansion feeder 603, and a clamping device 604. The second crossbeam 601 spans the left end of the first crossbeam 503-1 behind the annular conveyor 2. The third linear motor 602 is fixedly mounted on the end face of the second crossbeam 601 near the first crossbeam 503-1. The second expansion feeder 603 is mounted on the output end of the third linear motor 602 via a lifting device. It is used to open and pick up the pump casing placed on the first placement platform 901 and place the pump casing on the turbine end cover of the semi-finished motor with the sealing ring already assembled. The structure and working principle of the second expansion feeder 603 are similar to those of the first expansion feeder 503-4, but the size and clamping force of the second expansion feeder 603 are adapted to the structure and weight of the pump casing. It usually picks up and puts the pump casing by opening it from the inner hole of the pump casing. The clamping device 604 is fixedly mounted on the output end of the third linear motor 602 and located at the rear end of the expansion feeder 603. After the expansion feeder 603 places the pump housing in position, the clamping device 604 extends downward and applies downward pressure to the pump housing, pressing it firmly against the turbine end cover. This ensures a tight fit between the pump housing and the turbine end cover, eliminating gaps and preparing for subsequent fixing processes. The clamping device 604 can be a clamping cylinder or a pressure head driven by a servo electric cylinder.

[0030] The second fixed station 7 includes a second fixing device 701 and a second limiting device 702. The second fixing device 701 is located at the left end of the second crossbeam 601. When the placement mechanism 9, carrying the semi-finished motor with the pump housing pre-assembled, moves to below the second fixing device 701, the second fixing device 701 is activated, fixing the pump housing to the turbine end cover on the semi-finished motor using fixing bolts. The second fixing device 701 can also use an automatic screw machine or an automatic bolt locking device, and the tightening parameters can be independently set according to the connection requirements between the pump housing and the turbine end cover. The second limiting device 702 is located at the rear side between the second crossbeam 601 and the second fixing device 701. When the second fixing device 701 is tightened, the second limiting device 702 is used to limit the fixing bolts, preventing the bolts from rotating and ensuring the reliability of the second fixing process. The structure of the second limiting device 702 can be the same as or similar to the first limiting device 402.

[0031] The unloading station 8 includes a fixed frame 801, a fourth linear motor 802, and an unloading clamping device 803. The fixed frame 801 is fixedly installed at the front end of the second fixed device 701 at the top of the worktable 1. The fourth linear motor 802 is fixedly installed on the end face of the fixed frame 801 near the second fixed device 701, and is used to drive the unloading clamping device 803 to move horizontally. The unloading clamping device 803 is mounted on the output shaft of the fourth linear motor 802 via a lifting device, and is used to clamp the assembled water pump from the second placement table 902 after all assembly processes, and transport the water pump to the next process. The unloading clamping device 803 can use a pneumatic gripper or a vacuum suction cup gripper head to adapt to the shape of the water pump and ensure stable clamping.

[0032] During operation, firstly, the robotic arm 10 grabs the pump casing and places it on the first placement platform 901 inside the annular conveyor 2. Simultaneously, the feeding conveyor 301 feeds the semi-finished motor into this mechanism, the feeding reversing device 302 reverses the direction of the semi-finished motor so that the turbine end cover faces upwards, and the feeding transfer device 303 transfers the reversed semi-finished motor to the second placement platform 902 outside the annular conveyor 2. Subsequently, the annular conveyor 2 rotates in a step-by-step manner, sequentially delivering the placement mechanism 9 to each workstation. At the first fixed workstation 4, the first fixing device 401 fixes the turbine end cover to the motor casing. At the sealing ring assembly workstation 5, the sealing ring shifting mechanism 501 delivers the fitting device 501-3 with the sealing ring attached to the clamping position, the sealing ring clamping and transfer device 503-3 moves the sealing ring to the sealing ring temporary storage platform 502, and the expansion-type material taker 503-4 removes the sealing ring from the temporary storage platform and places it on the turbine end cover. At pump casing assembly station 6, the expansion feeder 603 removes the pump casing from the first placement table 901 and places it on the turbine end cover, where the clamping device 604 clamps the pump casing. At the second fixing station 7, the second fixing device 701 secures the pump casing to the turbine end cover. Finally, at the unloading station 8, the unloading clamping device 803 removes the assembled water pump and transports it to the next process. This completes a cycle of water pump casing assembly. The circular conveyor 2 continues to rotate, driving the next placement mechanism 9 into each station, achieving continuous batch production.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0034] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pump casing assembly mechanism for assembling a water pump, comprising a workbench (1), characterized in that, A ring conveyor (2) is set at the center of the top of the workbench (1). The conveying path of the ring conveyor (2) on the workbench (1) is arranged in sequence with a loading station (3), a first fixed station (4), a sealing ring assembly station (5), a pump casing assembly station (6), a second fixed station (7), and a unloading station (8). The annular conveying device (2) has multiple placement mechanisms (9) equidistantly arranged on its output end. The placement mechanism (9) includes a first placement platform (901) and a second placement platform (902). The first placement platform (901) is located inside the conveying path of the annular conveying device (2) and is used to place the pump casing. The pump casing is conveyed to the pump casing assembly station (6) for assembly along with the conveying of the annular conveying device (2). The second placement platform (902) is located outside the conveying path of the ring conveyor (2). It is used to place the semi-finished motor with the turbine end cover assembled through the loading station (3), and to convey the semi-finished motor to the first fixed station (4), the sealing ring assembly station (5), the pump housing assembly station (6) and the second fixed station (7) in sequence for assembly and fixing.

2. The pump casing assembly mechanism for water pump assembly according to claim 1, characterized in that, The workbench (1) is equipped with a robotic arm (10) at the front end. The robotic arm (10) is used to grip the pump casing on the external tray and place it on a first placement platform (901) at the front end of the loading station (3).

3. The pump casing assembly mechanism for water pump assembly according to claim 2, characterized in that, The loading station (3) includes a loading conveyor (301), a loading reversing device (302), and a loading transfer device (303). The feeding conveying device (301) is located at the right end of the ring conveying device (2). The feeding conveying device (301) is used to transport the semi-finished product motor to the feeding reversing device (302) and the feeding transfer device (303). The feeding reversing device (302) spans the middle section of the feeding conveying device (301) and is used to reverse the semi-finished product motor so that the turbine end cover is in the upper position. The feeding and transfer device (303) spans the left end of the feeding conveyor (301) between the feeding reversing device (302) and the second placement platform (902), and is used to transfer the semi-finished motor after the feeding reversing device (302) is reversed to the second placement platform (902).

4. The pump casing assembly mechanism for water pump assembly according to claim 3, characterized in that, The first fixed station (4) includes a first fixing device (401) and a first limiting device (402); The first fixing device (401) is located at the left end of the feeding conveyor (301). The first fixing device (401) spans across the upper rear side of the annular conveyor (2) and fixes the turbine end cover and the motor housing together with fixing bolts. The first limiting device (402) is located at the rear side between the first fixing device (401) and the feeding conveying device (301), and is used to limit the fixing bolts when the first fixing device (401) is fixed.

5. A pump casing assembly mechanism for water pump assembly according to claim 4, characterized in that, The sealing ring assembly station (5) includes a sealing ring shifting mechanism (501), a sealing ring temporary storage platform (502), and a sealing ring material handling mechanism (503). The sealing ring shifting mechanism (501) includes a first linear motor (501-1), a moving seat (501-2), and several fitting devices (501-3). The moving seat (501-2) is located at the rear end of the annular conveying device (2) at the top of the workbench (1). The moving seat (501-2) is fixedly installed on the output end of the first linear motor (501-1). Several fitting devices (501-3) are equidistantly arranged at the top of the moving seat (501-2) near one end of the annular conveying device (2). The sealing ring picking mechanism (503) includes a cross frame (503-1), a second linear motor (503-2), a sealing ring clamping and transferring device (503-3), and an expansion feeder (503-4). The cross frame (503-1) spans across the left end of the first fixed station (4) at the rear end of the annular conveyor (2). The second linear motor (503-2) is installed on the end face of the cross frame (503-1) near the end of the first fixed device (401). The sealing ring clamping and transferring device (503-3) and the expansion feeder (503-4) are both fixed on the output end of the second linear motor (503-2) by a lifting device. The sealing ring temporary storage platform (502) is located at the front end of the first linear motor (501-1) at the right end of the cross frame (503-1); The sealing ring clamping and transferring device (503-3) is used to clamp the sealing ring on the sleeve (501-3) and transfer it to the sealing ring temporary storage platform (502); The expansion feeder (503-4) is used to open and take the sealing ring temporarily stored on the sealing ring storage platform (502), and to put the sealing ring on the sealing part of the turbine end cover.

6. The pump casing assembly mechanism for water pump assembly according to claim 5, characterized in that, The pump casing assembly station (6) includes a second crossbeam (601), a third linear motor (602), an expansion feeder (603), and a clamping device (604). The second crossbeam (601) spans across the left end of the first crossbeam (503-1) behind the annular conveyor (2); The third linear motor (602) is fixedly installed on the end face of the second crossbeam (601) near the first crossbeam (503-1); The second expansion feeder (603) is installed on the output end of the third linear motor (602) via a lifting device. It is used to open and pick up the pump casing placed on the first placement platform (901) and place it on the turbine end cover of the semi-finished motor. The clamping device (604) is fixedly installed at the output end of the third linear motor (602) at the rear end of the expansion feeder, and is used to clamp the pump casing.

7. A pump casing assembly mechanism for assembling a water pump according to claim 6, characterized in that, The second fixed station (7) includes a second fixing device (701) and a second limiting device (702); The second fixing device (701) is located at the left end of the second cross frame (601), and the pump casing and the turbine end cover on the semi-finished motor are fixedly connected by fixing bolts; The second limiting device (702) is located at the rear side between the second crossbeam (601) and the second fixing device (701), and is used to limit the fixing bolts when the second fixing device (701) is fixed.

8. A pump casing assembly mechanism for water pump assembly according to claim 7, characterized in that, The unloading station (8) includes a fixed frame (801), a fourth linear motor (802), and an unloading clamping device (803). The first fixing frame (801) is fixedly installed at the front end of the second fixing device (701) at the top of the workbench (1); The fourth linear motor (802) is fixedly installed on the end face of the first fixed frame (801) near the second fixed device (701) and is used to drive the unloading clamping device (803) to move. The material handling clamping device (803) is mounted on the output shaft of the fourth linear motor (802) via a lifting device, and is used to clamp the water pump that has been assembled on the second placement table (902) and transport it to the next process.

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