A combined pump-motor torque detection device

Abstract

The present invention belongs to the field of torque detection technology, and specifically relates to a coupled pump-motor torque detection device, comprising a base, the top surface of which is provided with a drive motor and a coupled pump-motor, the output shaft of the drive motor being coaxially connected to the input end of a hydraulic pump via a first torque sensor, the top surface of the base also being provided with a second torque sensor and a universal coupling, the output shaft at the motor end of the coupled pump-motor being coaxially connected to the second torque sensor via a universal coupling. The present invention connects the output shaft at the motor end to the torque sensor via the universal coupling, and controls the torque sensor to move closer to or further away from the coupled pump-motor by advancing a hydraulic cylinder, thereby making the assembly process more convenient and efficient, thereby helping to improve the detection efficiency of the coupled pump-motor.

Description

Technical Field

[0001] The present invention belongs to the technical field of torque detection, and in particular relates to a coupled pump-motor torque detection device. Background Art

[0002] As a critical component in the steering system of specialized vehicles, the coupled pump-motor is subject to stringent requirements for key performance, including sealing, safety, reliability, and torque output characteristics. The coupled pump-motor is an integrated hydraulic actuator consisting of a hydraulic pump and a hydraulic motor. During the manufacturing process, torque testing of the coupled pump-motor is required to determine whether its performance meets standards.

[0003] Existing technology focuses on detecting the output shaft torque of hydraulic motor components. This is achieved by coaxially connecting a torque sensor to the hydraulic motor's output shaft via a coupling and then measuring the torque. However, during actual installation, the motor output shaft and the torque sensor's input shaft must be coaxially arranged. This means that the combined pump-motor must first be fixed and then adjusted in height. This makes the assembly process very cumbersome and difficult to ensure installation accuracy, indirectly resulting in low detection efficiency and reduced accuracy for the combined pump-motor. Therefore, a combined pump-motor torque detection device is needed to address these drawbacks. Summary of the Invention

[0004] (1) Technical issues to be resolved

[0005] The technical problem to be solved by the present invention is: how to provide a coupled pump-motor torque detection device to solve the problems existing in the above background.

[0006] (2) Technical solution

[0007] To solve the above technical problems, the present invention provides a coupled pump-motor torque detection device, comprising: a base 1, a drive motor 2 and a coupled pump-motor 4 being provided on the top surface of the base 1, wherein the output shaft of the drive motor 2 is coaxially connected to the input shaft of the pump of the coupled pump-motor 4 via a first torque sensor 3;

[0008] A second torque sensor 5 and a universal coupling 6 are provided on the top surface of the base 1 ; the motor-end output shaft of the conjoined pump-motor 4 is coaxially connected to the second torque sensor 5 via the universal coupling 6 .

[0009] The top surface of the base 1 is movably provided with a sliding platform 8, and the second torque sensor 5 is provided on the top surface of the sliding platform 8;

[0010] A propulsion hydraulic cylinder 9 is also fixedly provided on the top surface of the base 1 , and the piston rod of the propulsion hydraulic cylinder 9 is fixedly connected to the sliding platform 8 for pushing the sliding platform 8 toward or away from the conjoined pump-motor 4 .

[0011] The two ends of the universal coupling 6 are respectively connected to the motor end of the conjoined pump motor 4 and the second torque sensor 5 through the coupling;

[0012] Among them, the top surface of the sliding table 8 is provided with a movable seat 13, the movable seat 13 is hinged with a connecting rod 14, the end of the connecting rod 14 is hinged with a support seat 15, and the support seat 15 is provided with a bearing seat 16; the universal joint 6 passes through the bearing seat 16 and rotates with it through the bearing.

[0013] A displacement hydraulic cylinder 17 is provided on the top surface of the sliding platform 8 , and a piston rod of the displacement hydraulic cylinder 17 is connected to the movable seat 13 for pushing the movable seat 13 to slide along the top surface of the sliding platform 8 .

[0014] When installing the coupled pump-motor 4 , the position of the bearing seat 16 is adjusted by adjusting the extension and contraction of the piston rod of the displacement hydraulic cylinder 17 and the position of the connecting rod to ensure the coaxial accuracy with the output shaft of the coupled pump-motor 4 .

[0015] Among them, a dynamometer 7 is provided on the top surface of the sliding table 8, and the input end of the dynamometer 7 is coaxially connected to the second torque sensor 6; the dynamometer 7 is coaxially connected to the motor output shaft of the coupled pump motor 4 through the second torque sensor 5 and the universal coupling 6 to measure the power of the motor output shaft of the coupled pump motor 4.

[0016] Among them, a detection pipeline 10 is provided on the channel connecting the pump end outlet and the motor end inlet in the coupled pump-motor 4, and a pulse sensor 11 is provided on the detection pipeline 10 for detecting the pump outlet flow and pressure pulsation. The signal output ends of the pulse sensor 11 and the first torque sensor 3 and the second torque sensor 5 are all connected to the same controller.

[0017] Among them, the purpose of setting up the pulse sensor 11 is to measure the flow and pressure pulsation characteristics output by the pump end of the coupled pump-motor 4. Since the pulse signal has a certain influence on the output shaft torque of the motor end of the coupled pump-motor 4, by measuring the pulse signal, the fluctuation characteristics of the output torque of the motor end of the coupled pump-motor 4 can be measured more accurately.

[0018] Among them, the top surface of the base 1 is provided with a conjoined pump-motor mounting seat 12, and the conjoined pump-motor mounting seat 12 is a U-shaped structure. The conjoined pump-motor 4 is arranged on the conjoined pump-motor mounting seat 12, and hydraulic clamping components for clamping the conjoined pump-motor 4 are provided on both sides of the conjoined pump-motor mounting seat 12.

[0019] The clamping assembly includes a clamping hydraulic cylinder 18 and a clamping portion 19, wherein the cylinder body of the clamping hydraulic cylinder 18 is fixedly mounted on the outer wall of the coupled pump-motor mounting base 12, and the piston rod of the clamping hydraulic cylinder 18 is fixedly connected to the clamping portion 19, so that the coupled pump-motor 4 can be clamped and fixed together by the two clamping portions 19.

[0020] (3) Beneficial effects

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention connects the output shaft of the coupled pump motor and the torque sensor through a universal coupling, and controls the second torque sensor to move closer to or farther from the coupled pump motor by pushing the hydraulic cylinder, thereby making the assembly process of detection more convenient and efficient, and helping to improve the detection efficiency and detection accuracy of the coupled pump motor;

[0023] (2) The present invention improves the stability of the universal joint by rotating the bearing on the support seat and the bearing seat with the universal joint, thereby helping to improve the detection accuracy of the torque detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 for Figure 1 The corresponding figure at A is enlarged;

[0026] Figure 3 This is a structural schematic diagram of the motor mounting base of the present invention.

[0027] In the figure: 1. Base; 2. Drive motor; 3. First torque sensor; 4. Conjoined pump motor; 5. Second torque sensor; 6. Universal joint; 7. Dynamometer; 8. Displacement table; 9. Propulsion hydraulic cylinder; 10. Detection pipeline; 11. Pulse sensor; 12. Conjoined pump motor mounting base; 13. Movable base; 14. Connecting rod; 15. Support base; 16. Bearing base; 17. Displacement hydraulic cylinder; 18. Clamping hydraulic cylinder; 19. Clamping mechanism. DETAILED DESCRIPTION

[0028] In order to make the purpose, content, and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below with reference to the accompanying drawings and examples.

[0029] In order to solve the above technical problems, the present invention provides a coupled pump motor torque detection device, such as Figure 1-Figure 3As shown, the detection device includes: a base 1, a driving motor 2 and a conjoined pump motor 4 are provided on the top surface of the base 1, and the output shaft of the driving motor 2 is coaxially connected to the input shaft of the pump of the conjoined pump motor 4 through a first torque sensor 3;

[0030] A second torque sensor 5 and a universal coupling 6 are provided on the top surface of the base 1 ; the motor-end output shaft of the conjoined pump-motor 4 is coaxially connected to the second torque sensor 5 via the universal coupling 6 .

[0031] The top surface of the base 1 is movably provided with a sliding platform 8, and the second torque sensor 5 is provided on the top surface of the sliding platform 8;

[0032] A propulsion hydraulic cylinder 9 is also fixedly provided on the top surface of the base 1 , and the piston rod of the propulsion hydraulic cylinder 9 is fixedly connected to the sliding platform 8 for pushing the sliding platform 8 toward or away from the conjoined pump-motor 4 .

[0033] The two ends of the universal coupling 6 are respectively connected to the motor end of the conjoined pump motor 4 and the second torque sensor 5 through the coupling;

[0034] Among them, the top surface of the sliding table 8 is provided with a movable seat 13, the movable seat 13 is hinged with a connecting rod 14, the end of the connecting rod 14 is hinged with a support seat 15, and the support seat 15 is provided with a bearing seat 16; the universal joint 6 passes through the bearing seat 16 and rotates with it through the bearing.

[0035] A displacement hydraulic cylinder 17 is provided on the top surface of the sliding platform 8 , and a piston rod of the displacement hydraulic cylinder 17 is connected to the movable seat 13 for pushing the movable seat 13 to slide along the top surface of the sliding platform 8 .

[0036] When installing the coupled pump-motor 4 , the position of the bearing seat 16 is adjusted by adjusting the extension and contraction of the piston rod of the displacement hydraulic cylinder 17 and the position of the connecting rod to ensure the coaxial accuracy with the output shaft of the coupled pump-motor 4 .

[0037] Among them, a dynamometer 7 is provided on the top surface of the sliding table 8, and the input end of the dynamometer 7 is coaxially connected to the second torque sensor 6; the dynamometer 7 is coaxially connected to the motor output shaft of the coupled pump motor 4 through the second torque sensor 5 and the universal coupling 6 to measure the power of the motor output shaft of the coupled pump motor 4.

[0038] Among them, a detection pipeline 10 is provided on the channel connecting the pump end outlet and the motor end inlet in the coupled pump-motor 4, and a pulse sensor 11 is provided on the detection pipeline 10 for detecting the pump outlet flow and pressure pulsation. The signal output ends of the pulse sensor 11 and the first torque sensor 3 and the second torque sensor 5 are all connected to the same controller.

[0039] Among them, the purpose of setting up the pulse sensor 11 is to measure the flow and pressure pulsation characteristics output by the pump end of the coupled pump-motor 4. Since the pulse signal has a certain influence on the output shaft torque of the motor end of the coupled pump-motor 4, by measuring the pulse signal, the fluctuation characteristics of the output torque of the motor end of the coupled pump-motor 4 can be measured more accurately.

[0040] Among them, the top surface of the base 1 is provided with a conjoined pump-motor mounting seat 12, and the conjoined pump-motor mounting seat 12 is a U-shaped structure. The conjoined pump-motor 4 is arranged on the conjoined pump-motor mounting seat 12, and hydraulic clamping components for clamping the conjoined pump-motor 4 are provided on both sides of the conjoined pump-motor mounting seat 12.

[0041] The clamping assembly includes a clamping hydraulic cylinder 18 and a clamping portion 19, wherein the cylinder body of the clamping hydraulic cylinder 18 is fixedly mounted on the outer wall of the coupled pump-motor mounting base 12, and the piston rod of the clamping hydraulic cylinder 18 is fixedly connected to the clamping portion 19, so that the coupled pump-motor 4 can be clamped and fixed together by the two clamping portions 19.

[0042] The present invention can control the influence of the variable process of the variable pump in the coupled pump-motor 4 on the motor output torque, as well as the fluctuation characteristics of the flow and pressure characteristics output by the variable pump on the motor output torque.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A coupled pump-motor torque detection device, characterized in that: The detection device comprises: a base (1), a top surface of the base (1) is provided with a driving motor (2) and a conjoined pump motor (4), an output shaft of the driving motor (2) being coaxially connected to an input shaft of a pump of the conjoined pump motor (4) via a first torque sensor (3); A second torque sensor (5) and a universal joint (6) are simultaneously provided on the top surface of the base (1); the motor-end output shaft of the conjoined pump motor (4) is coaxially connected to the second torque sensor (5) via the universal joint (6); The top surface of the base (1) is movably provided with a sliding platform (8), and the second torque sensor (5) is provided on the top surface of the sliding platform (8); A propulsion hydraulic cylinder (9) is also fixedly provided on the top surface of the base (1), and a piston rod of the propulsion hydraulic cylinder (9) is fixedly connected to the sliding platform (8) for pushing the sliding platform (8) toward or away from the conjoined pump motor (4); The two ends of the universal coupling (6) are respectively connected to the motor end of the conjoined pump motor (4) and the second torque sensor (5) through the coupling; The top surface of the sliding table (8) is provided with a movable seat (13), a connecting rod (14) is hingedly provided on the movable seat (13), the end of the connecting rod (14) is hingedly provided with a support seat (15), and a bearing seat (16) is provided on the support seat (15); the universal joint (6) passes through the bearing seat (16) and rotates with it through the bearing; A dynamometer (7) is provided on the top surface of the sliding table (8), and the input end of the dynamometer (7) is coaxially connected to the second torque sensor (5); the dynamometer (7) is coaxially connected to the motor output shaft of the conjoined pump motor (4) through the second torque sensor (5) and the universal joint (6) to measure the power of the motor output shaft of the conjoined pump motor (4); A detection pipeline (10) is provided on a channel connecting the pump end outlet and the motor end inlet in the conjoined pump motor (4). A pulse sensor (11) is provided on the detection pipeline (10) for detecting the pump outlet flow rate and pressure pulsation. The signal output ends of the pulse sensor (11), the first torque sensor (3), and the second torque sensor (5) are all connected to the same controller.

2. The coupled pump-motor torque detection device according to claim 1, wherein: A displacement hydraulic cylinder (17) is provided on the top surface of the sliding platform (8), and a piston rod of the displacement hydraulic cylinder (17) is connected to the movable seat (13) for pushing the movable seat (13) to slide along the top surface of the sliding platform (8).

3. The coupled pump-motor torque detection device according to claim 2, wherein: When installing the conjoined pump motor (4), the position of the bearing seat (16) is adjusted by adjusting the extension and contraction of the piston rod of the displacement hydraulic cylinder (17) and the position of the connecting rod to ensure the coaxial accuracy with the output shaft of the conjoined pump motor (4).

4. The coupled pump-motor torque detection device according to claim 1, wherein: The pulse sensor (11) is provided for measuring the flow rate and pressure pulsation characteristics outputted from the pump end of the coupled pump motor (4). Since the pulse signal has a certain influence on the output shaft torque of the motor end of the coupled pump motor (4), the fluctuation characteristics of the output torque of the motor end of the coupled pump motor (4) can be measured more accurately by measuring the pulse signal.

5. The coupled pump-motor torque detection device according to claim 1, wherein: The top surface of the base (1) is provided with a conjoined pump-motor mounting seat (12), the conjoined pump-motor mounting seat (12) is in a U-shaped structure, the conjoined pump-motor (4) is arranged on the conjoined pump-motor mounting seat (12), and hydraulic clamping components for clamping the conjoined pump-motor (4) are provided on both sides of the conjoined pump-motor mounting seat (12).

6. The coupled pump-motor torque detection device according to claim 5, characterized in that: The clamping assembly comprises a clamping hydraulic cylinder (18) and a clamping portion (19), wherein the cylinder body of the clamping hydraulic cylinder (18) is fixedly mounted on the outer wall of the coupled pump-motor mounting seat (12), and the piston rod of the clamping hydraulic cylinder (18) is fixedly connected to the clamping portion (19), so that the coupled pump-motor (4) can be clamped and fixed together by the two clamping portions (19).

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