Split toilet tank water component nut tightening device

Abstract

This utility model discloses a device for tightening nuts on the water fittings of a split toilet tank, relating to the field of toilet tank fitting assembly technology. The device includes a frame, an assembly table, an electrical control system, a water outlet valve nut tightening mechanism, a water inlet valve nut tightening mechanism, and a foot switch. The assembly table is equipped with adjustable front, rear, and side limit blocks for positioning water tanks of different sizes. The water outlet valve nut tightening mechanism is fixedly installed, and its first servo motor drives the water outlet valve nut sleeve wrench via a first telescopic transmission component. The water inlet valve nut tightening mechanism is installed on a two-dimensional adjustable platform, and its second servo motor drives the water inlet valve nut sleeve wrench via a second telescopic transmission component; the position is adjustable to fit the water inlet valve mounting hole. The telescopic transmission component has a spring return function. The electrical control system controls the servo motors to achieve constant torque tightening. This achieves automated constant torque tightening of the nuts, improving assembly efficiency and quality, offering strong adaptability and ease of operation.

Description

Technical Field

[0001] This utility model relates to the field of toilet tank water component assembly technology, specifically a nut tightening device for split toilet tank water components. Background Technology

[0002] In the production and assembly of two-piece toilets, the assembly of the water tank components is one of the key processes, with the installation of the locking nuts for the inlet and outlet valves being particularly important. Currently, this installation process is generally carried out manually, requiring workers to manually align the nuts with the mounting holes of the water components and then gradually tighten the nuts with a wrench. This traditional assembly method has the following drawbacks: First, the assembly process is cumbersome, consuming a lot of manpower and time, and is labor-intensive; second, the pre-tightening force obtained manually relies entirely on experience, making it impossible to guarantee consistency, which can easily lead to problems such as insufficient pre-tightening force causing leaks or excessive pre-tightening force damaging parts, increasing the rework rate; third, manual operation is inefficient and cannot meet the needs of large-scale production. Therefore, a nut tightening device for two-piece toilet tank components is proposed. Utility Model Content

[0003] The present invention aims to solve the above problems, thereby providing a device for tightening nuts on split toilet tank components that can achieve automated tightening, ensure assembly quality, and be adaptable to various products.

[0004] The technical solution adopted by this utility model to solve the aforementioned problem is: A split toilet tank water component nut tightening device includes a frame, an assembly table set on the top of the frame, an electrical control system, an outlet valve nut tightening mechanism, an inlet valve nut tightening mechanism, and a start switch; The assembly platform is provided with a limiting component for positioning and clamping the toilet tank. The limiting component includes an adjustable rear limiting block, a front limiting block, and a side limiting block. The outlet valve nut tightening mechanism is fixedly installed inside the frame, and its position corresponds to the lower part of the outlet valve mounting hole of the positioned water tank. The outlet valve nut tightening mechanism includes a first servo motor, a first telescopic transmission component driven by the first servo motor, and an outlet valve nut socket wrench installed at the end of the first telescopic transmission component. The inlet valve nut tightening mechanism is movably installed inside the frame and its position is adjustable to adapt to the position of the inlet valve mounting hole in different water tank models. The inlet valve nut tightening mechanism includes a second servo motor, a second telescopic transmission assembly driven by the second servo motor, and an inlet valve nut socket wrench installed at the end of the second telescopic transmission assembly. The electrical control system is electrically connected to the first servo motor, the second servo motor, and the start switch, respectively, and is used to control the start and stop of the motors and achieve constant torque output; the start switch is used to trigger the nut tightening operation.

[0005] Furthermore, both the first telescopic transmission assembly and the second telescopic transmission assembly include a fixed sleeve, a wrench shaft slidably disposed within the fixed sleeve, a key connection structure for driving the wrench shaft to rotate, and a spring mechanism for providing axial restoring force; the spring mechanism enables the wrench shaft to remain extended when not under force, and to compress and retract when its top end is subjected to axial pressure from a nut.

[0006] Furthermore, the inlet valve nut tightening mechanism is mounted on the frame via a two-dimensional adjustable platform, which includes a first adjusting component for adjusting the lateral position and a second adjusting component for adjusting the longitudinal position.

[0007] Furthermore, the two-dimensional adjustable platform is a manually adjustable slide, and the first and second adjusting components are respectively lead screw adjustment mechanisms with handwheels.

[0008] Furthermore, the rear limit block, front limit block and side limit block in the limiting assembly are all provided with bolt holes, and a T-shaped slide groove is provided on the assembly table. A slider is provided in the T-shaped slide groove, and an internal thread hole is provided on the top surface of the slider. Each block is detachably fixed to the assembly table by bolts.

[0009] Furthermore, the electrical control system includes a human-machine interface for setting and displaying the target torque values ​​of the first servo motor and the second servo motor.

[0010] Furthermore, the start switch is a foot switch.

[0011] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are: By setting up two sets of nut tightening actuators in conjunction with control components, the inlet and outlet valve nuts are automatically tightened, replacing traditional manual operation and significantly reducing the labor intensity of workers. While the equipment is automatically tightening the nuts, the operator can perform other auxiliary assembly work, improving the overall assembly efficiency. The adjustable limit structure in the positioning and bearing component can adjust the position according to the size of different specifications of split toilet tanks to ensure accurate tank positioning; the two sets of nut tightening actuators can correspond to the installation positions of inlet and outlet valves at different locations, adapting to products with various relative positions of inlet and outlet valves, thus expanding the applicability of the equipment. By adopting servo motor constant torque control, the tightening torque of the nut can be precisely controlled, ensuring that the preload of each product is consistent. This effectively avoids the risk of water leakage due to insufficient torque or damage to components due to excessive torque, and ensures the stability of assembly quality. It is started with a foot switch, allowing the operator to focus on placing the water tank and aligning the water components with both hands, making the process smooth and ergonomic. Attached Figure Description

[0012] Figure 1 This is a three-dimensional schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the usage state structure of an embodiment of the present utility model; Figure 3 This is a top view of the assembly platform and its limiting components of this utility model; Figure 4 This is a schematic diagram of the structure of the outlet valve nut tightening mechanism of this utility model; Figure 5 This is a cross-sectional structural diagram of the telescopic transmission assembly of this utility model; Figure 6 This is a schematic diagram of the water inlet valve nut tightening mechanism and its two-dimensional adjustment platform of this utility model; Figure 7 This is a schematic diagram of the back-side cross-sectional structure of the present invention in its working state.

[0013] The components in the diagram are labeled as follows: 1. Frame; 2. Assembly table; 201. Rear limit stop; 202. Front limit stop; 203. Side limit stop; 3. Human-machine interface; 4. Water outlet valve nut tightening mechanism; 401. First support plate; 402. First servo motor; 403. First telescopic transmission assembly; 403-1. Fixed sleeve; 403-2. Bushing; 403-3. Motor shaft connecting cover plate; 403-4. Spring fixing rod; 403-5. Return spring; 403-6. Flat key; 403-7. Wrench shaft; 404. Water outlet valve. 5. Nut socket wrench; 6. Inlet valve nut tightening mechanism; 7. Second support plate; 8. Two-dimensional adjustable platform; 9. Horizontal adjustment knob; 10. Vertical adjustment knob; 11. Motor mounting bracket; 12. Second servo motor; 13. Second telescopic transmission assembly; 14. Inlet valve nut socket wrench; 15. Foot switch; 16. Toilet tank; 17. Tank body; 18. Water outlet valve; 19. Water inlet valve; 20. Outlet valve locking nut; 21. Inlet valve locking nut. Detailed Implementation

[0014] The present invention will be further described below with reference to embodiments, the purpose of which is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0015] See Figures 1-7 A nut tightening device for a split toilet tank includes a frame 1, which provides support for the entire device. An assembly platform 2 is fixed to the top of the frame 1 and is used to place the toilet tank 7 to be assembled. The assembly platform 2 is equipped with adjustable limiting components, including a rear limiting block 201, a front limiting block 202, and a side limiting block 203. These blocks are adjusted and fixed in position via T-slots, sliders, and bolts on the assembly platform 2, thereby adapting to the positioning requirements of water tanks of different shapes and sizes, ensuring that the outlet valve mounting holes and inlet valve mounting holes on the water tank are accurately aligned with the tightening mechanism below.

[0016] The outlet valve nut tightening mechanism 4 is fixedly installed in the middle position inside the frame 1 via a first support plate 401. This mechanism includes a first servo motor 402, a first telescopic transmission assembly 403, and an outlet valve nut socket wrench 404. The output shaft of the first servo motor 402 drives the outlet valve nut socket wrench 404 to rotate via the first telescopic transmission assembly 403.

[0017] The inlet valve nut tightening mechanism 5 is installed inside the frame 1 via a two-dimensional adjustable platform 502, located to the side of the outlet valve nut tightening mechanism 4. This mechanism includes a second servo motor 504, a second telescopic transmission assembly 505, and an inlet valve nut socket wrench 506. In this embodiment, the two-dimensional adjustable platform 502 is a manually adjustable slide. By rotating the horizontal adjustment knob 502-1 and the vertical adjustment knob 502-2 (usually a lead screw structure), the motor mounting bracket 503 (the entire inlet valve nut tightening mechanism 5 with the second servo motor 504 fixed on it) mounted on its slide can be moved in the horizontal plane, thereby precisely adjusting the position of the inlet valve nut socket wrench 506 to align it with the inlet valve mounting hole on the side of the water tank.

[0018] The first telescopic transmission assembly 403 and the second telescopic transmission assembly 505 have the same structure. Taking assembly 403 as an example (see...) Figure 4 , Figure 5The device includes a motor shaft connecting cover plate 403-3 fixed to the output shaft of the first servo motor 402. The motor shaft connecting cover plate 403-3 is housed within a bushing 403-2, which is connected to a fixed sleeve 403-1. A wrench shaft 403-7 is axially slidably disposed within the fixed sleeve 403-1, and circumferential transmission is achieved while axial movement is permitted through a key 403-6 engaging with a keyway within the fixed sleeve 403-1. A spring fixing rod 403-4 is mounted at the bottom of the fixed sleeve 403-1, and a return spring 403-5 is fitted onto the spring fixing rod 403-4, its top end pressing against a groove at the bottom of the wrench shaft 403-7. In its natural state, the return spring 403-5 pushes the wrench shaft 403-7 and the socket wrench 404 upwards. When the operator lowers the water tank, inserts the mounting rod of the valve body into the water tank mounting hole, and presses down on the locking nut pre-placed in the socket wrench, the wrench shaft 403-7 is pressed down, compressing the return spring 403-5. This design ensures both the initial engagement of the nut and the valve stem thread and provides continuous axial pressure as the nut is screwed in during tightening, and returns the wrench shaft to its original position after tightening.

[0019] The electrical control system includes a human-machine interface 3 (such as a touchscreen), a PLC controller, servo drivers, and a foot switch 6. The human-machine interface 3 is used to set the target torque parameters for the first servo motor 402 and the second servo motor 504. The foot switch 6 serves as the start signal input device. During operation, the operator positions the water tank 7, aligns the socket wrench with the pre-installed nut with the valve stem, and then steps on the foot switch 6. The PLC controller then controls the two servo motors to rotate according to the set torque value, automatically stopping after tightening.

[0020] Workflow summary: Adjust the two-dimensional positions of each limit block on the assembly platform 2 and the water inlet valve nut tightening mechanism 5 according to the water tank model.

[0021] Set the tightening torque value on the human-computer interaction interface 3.

[0022] Insert the outlet valve locking nut 704 into the outlet valve nut socket wrench 404, and insert the inlet valve locking nut 705 into the inlet valve nut socket wrench 506.

[0023] Place the toilet tank 7 on the assembly platform 2 and position it accurately using the limit block.

[0024] Insert the water outlet valve 702 and the water inlet valve 703 into the corresponding mounting holes inside the water tank, and initially rotate them so that their mounting rods are screwed into the nuts in the corresponding socket wrenches.

[0025] Stepping on foot switch 6 starts two servo motors simultaneously, causing the socket wrench to rotate and tighten the nut.

[0026] When the tightening torque reaches the preset value, the servo motor automatically stops running.

[0027] The operator lifts the assembled water tank upwards, and the telescopic transmission component resets under the action of the spring, ready for the next work cycle.

[0028] By setting up two sets of nut tightening actuators in conjunction with control components, the inlet and outlet valve nuts are automatically tightened, replacing traditional manual operation and significantly reducing the labor intensity of workers. While the equipment is automatically tightening the nuts, the operator can perform other auxiliary assembly work, improving the overall assembly efficiency. The adjustable limit structure in the positioning and bearing component can adjust the position according to the size of different specifications of split toilet tanks to ensure accurate tank positioning; the two sets of nut tightening actuators can correspond to the installation positions of inlet and outlet valves at different locations, adapting to products with various relative positions of inlet and outlet valves, thus expanding the applicability of the equipment. By adopting servo motor constant torque control, the tightening torque of the nut can be precisely controlled, ensuring that the preload of each product is consistent. This effectively avoids the risk of water leakage due to insufficient torque or damage to components due to excessive torque, and ensures the stability of assembly quality. It is started with a foot switch, allowing the operator to focus on placing the water tank and aligning the water components with both hands, making the process smooth and ergonomic.

[0029] The above description is only a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A device for tightening nuts on water components of a split toilet tank, comprising a frame, characterized in that: It also includes an assembly table located on top of the frame, an electrical control system, a water outlet valve nut tightening mechanism, a water inlet valve nut tightening mechanism, and a start switch; The assembly platform is provided with a limiting component for positioning and clamping the toilet tank. The limiting component includes an adjustable rear limiting block, a front limiting block, and a side limiting block. The outlet valve nut tightening mechanism is fixedly installed inside the frame, and its position corresponds to the lower part of the outlet valve mounting hole of the positioned water tank. The outlet valve nut tightening mechanism includes a first servo motor, a first telescopic transmission component driven by the first servo motor, and an outlet valve nut socket wrench installed at the end of the first telescopic transmission component. The inlet valve nut tightening mechanism is movably installed inside the frame and its position is adjustable to adapt to the position of the inlet valve mounting hole in different water tank models. The inlet valve nut tightening mechanism includes a second servo motor, a second telescopic transmission assembly driven by the second servo motor, and an inlet valve nut socket wrench installed at the end of the second telescopic transmission assembly. The electrical control system is electrically connected to the first servo motor, the second servo motor, and the start switch, respectively, and is used to control the start and stop of the motors and achieve constant torque output; the start switch is used to trigger the nut tightening operation.

2. The device for tightening the nut of a split toilet tank water component according to claim 1, characterized in that: Both the first telescopic transmission assembly and the second telescopic transmission assembly include a fixed sleeve, a wrench shaft that can be axially slidably disposed within the fixed sleeve, a key connection structure for driving the wrench shaft to rotate, and a spring mechanism that provides axial restoring force; the spring mechanism enables the wrench shaft to remain extended when not under force, and to compress and retract when its top end is subjected to axial pressure from a nut.

3. The device for tightening nuts on a split toilet tank according to claim 1, characterized in that: The inlet valve nut tightening mechanism is mounted on the frame via a two-dimensional adjustable platform. The two-dimensional adjustable platform includes a first adjusting component for adjusting the lateral position and a second adjusting component for adjusting the longitudinal position.

4. The device for tightening the nut of a split toilet tank water component according to claim 3, characterized in that: The two-dimensional adjustable platform is a manually adjustable slide, and the first and second adjusting components are respectively lead screw adjustment mechanisms with handwheels.

5. The device for tightening nuts on the water tank components of a split toilet as described in claim 1, characterized in that: The rear limit block, front limit block, and side limit block in the limiting assembly are all provided with bolt holes. A T-shaped slide groove is provided on the assembly table, and a slider is provided in the T-shaped slide groove. An internal thread hole is provided on the top surface of the slider. Each block is detachably fixed to the assembly table by bolts.

6. The device for tightening the nut of a split toilet tank water component according to claim 1, characterized in that: The electrical control system includes a human-machine interface, which is used to set and display the target torque values ​​of the first servo motor and the second servo motor.

7. The device for tightening the nut of a split toilet tank water component according to claim 1, characterized in that: The start switch is a foot switch.

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