Device for detecting output torque of dynamometer

Abstract

The utility model discloses a dynamometer output torque detection device, which belongs to the technical field of torque detection and comprises a base, the top end of the base is fixedly provided with a secondary reducer body and a primary reducer, and the input end of the secondary reducer body is fixedly connected with the output end of the primary reducer. The input end of the first-stage speed reducer is fixedly connected with the output end of the servo motor, a threaded rod is arranged on the second-stage speed reducer body, the weighing sensor is installed at the top of the threaded rod through a rotating shaft, and a driving assembly capable of driving the threaded rod to drive the weighing sensor to ascend and descend is further assembled in the second-stage speed reducer body. And through the transmission design of the worm gear and the worm, the rotating speed can be stably increased and decreased, the mechanical self-locking function is achieved, and measurement errors caused by mechanical deformation are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of torque detection technology, and in particular to a device for detecting the output torque of a dynamometer. Background Technology

[0002] Currently, torque testing using dynamometers typically employs equipment such as hydraulic dynamometers or electric dynamometers. By simulating a load, the output torque and power of the tested power machinery are measured. Hydraulic dynamometers utilize water flow resistance to achieve torque measurement. Their working principle involves adjusting the resistance torque by controlling the water layer thickness, thereby measuring the output torque. This type of dynamometer has a simple structure, reliable operation, and is widely used in the performance testing of rotating equipment such as motors and engines.

[0003] Existing torque testing devices for dynamometers have shortcomings in terms of measurement accuracy and calibration efficiency. Traditional torque measurement methods rely on the stability of the mechanical structure and are easily affected by factors such as mechanical deformation and temperature changes, which makes it difficult to meet the requirements of high-precision testing. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing dynamometer torque detection devices in terms of measurement accuracy and verification efficiency, and to propose a dynamometer output torque detection device.

[0005] To achieve the above objectives, this utility model employs the following technology: a dynamometer output torque detection device, comprising a base, on the top of which a two-stage reducer body and a first-stage reducer are fixedly mounted respectively. The input end of the two-stage reducer body is fixedly connected to the output end of the first-stage reducer, and the input end of the first-stage reducer is fixedly connected to the output end of a servo motor. A threaded rod is provided on the two-stage reducer body, and a load cell is mounted on the top of the threaded rod via a rotating shaft. The interior of the two-stage reducer body is also equipped with a drive assembly capable of driving the threaded rod to move the load cell up and down.

[0006] As a further description of the above technical solution: the drive assembly includes a gear one fixedly installed on the input end of the secondary reducer body, a mounting bracket fixedly installed inside the secondary reducer body, a crossbar rotatably installed on the mounting bracket, and gear two and gear three respectively fixedly installed on the crossbar.

[0007] As a further description of the above technical solution: the first gear and the second gear mesh with each other, and one side of the output end of the second-stage reducer extends to the outside of the mounting bracket, where the fourth gear is fixedly connected.

[0008] As a further description of the above technical solution: the fourth gear meshes with the third gear, and the size of the fourth gear is larger than that of the third gear, while the size of the first gear is smaller than that of the second gear.

[0009] As a further description of the above technical solution: the worm is fixedly installed on the output end of the secondary reducer body, the worm wheel is rotatably installed inside the secondary reducer body, the ring is fixedly installed in the middle of the worm wheel, and the worm wheel meshes with the worm.

[0010] As a further description of the above technical solution: a through groove is provided on the body of the secondary reducer, and a circular groove of the same size as the annulus is provided on the through groove, the annulus is located in the circular groove, and the threaded rod is located in the through groove.

[0011] As a further description of the above technical solution: the inner diameter of the ring is provided with a threaded groove that is adapted to the threaded rod, and the threaded rod is threadedly connected to the threaded groove.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0013] This device combines a load cell with the torque system of a hydraulic dynamometer. A servo motor drives a primary reducer, which in turn drives a secondary reducer. The drive assembly within the secondary reducer allows the threaded rod to precisely lift the load cell. This structure enables real-time and accurate display of torque, matching the precision of the hydraulic dynamometer's torque data acquisition system and ensuring high accuracy and reliability in torque measurement. The worm gear transmission design not only achieves smooth speed increases and decreases but also features a mechanical self-locking function, effectively reducing measurement errors caused by mechanical deformation. Furthermore, the servo motor and secondary reducer can dynamically adjust the output torque according to actual needs, simulating load conditions under different operating circumstances. Attached Figure Description

[0014] Figure 1 An overall schematic diagram according to an embodiment of the present utility model is shown;

[0015] Figure 2 The present invention provides an embodiment of the present invention. Figure 1 Another perspective view;

[0016] Figure 3 An internal structural diagram of the two-stage reducer body provided according to an embodiment of the present invention is shown;

[0017] Figure 4 The present invention provides an embodiment of the present invention. Figure 3 Another perspective view;

[0018] Figure 5 A connection diagram of the worm gear and worm wheel provided according to an embodiment of the present invention is shown.

[0019] Legend:

[0020] 10. Base; 11. Secondary reducer body; 12. Primary reducer; 13. Servo motor; 14. Threaded rod; 15. Weighing sensor; 16. Drive assembly; 161. Gear 1; 162. Mounting bracket; 163. Gear 2; 164. Gear 3; 165. Gear 4; 166. Worm; 167. Worm wheel; 168. Ring. Detailed Implementation

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

[0022] Reference Figures 1 to 5 This embodiment provides a dynamometer output torque detection device, including a base 10. A two-stage reducer body 11 and a first-stage reducer 12 are fixedly installed on the top of the base 10. The input end of the two-stage reducer body 11 is fixedly connected to the output end of the first-stage reducer 12. The output end of the first-stage reducer 12 can drive the input end of the two-stage reducer body 11 to rotate. The input end of the first-stage reducer 12 is fixedly connected to the output end of a servo motor 13. The servo motor 13 can drive the input end of the first-stage reducer 12 to rotate. Through the internal transmission of the first-stage reducer 12, the output end of the first-stage reducer 12 can rotate. A threaded rod 14 is provided on the two-stage reducer body 11, and a weighing sensor 15 is installed on the top of the threaded rod 14 through a rotating shaft.

[0023] The interior of the secondary reducer body 11 is also equipped with a drive assembly 16 that can drive the threaded rod 14 to lift the load cell 15. The drive assembly 16 enables the threaded rod 14 to lift the load cell 15. The rising load cell 15 can contact the calibration arm of the hydraulic dynamometer. By lifting upward, the load cell 15 can display the magnitude of the torque in real time and transmit a torque to the torque system of the hydraulic dynamometer.

[0024] This device directly measures the force acting on the threaded rod 14 through the load cell 15. When the torque on the calibration lever arm of the hydraulic dynamometer is transmitted to the load cell 15, the load cell 15 converts the force signal into an electrical signal, which is then recorded and processed by the data acquisition system. The torque value is calculated based on the force value and the lever arm length and is displayed on the display screen of the data acquisition system in real time.

[0025] Reference Figures 3 to 5Specifically, in order to drive the weighing sensor 15 to lift and lower, a drive assembly 16 is provided. The drive assembly 16 includes a gear 161 fixedly installed on the input end of the secondary reducer body 11. The input end of the secondary reducer body 11 can drive the gear 161 to rotate. A mounting bracket 162 is fixedly installed inside the secondary reducer body 11. A crossbar is rotatably installed on the mounting bracket 162. Gears 163 and 164 are respectively fixedly installed on the crossbar. The crossbar makes the gears 163 and 164 coaxially connected, so that the gears 163 and 164 can rotate synchronously through the crossbar.

[0026] In more detail, gear 161 and gear 2 163 mesh with each other. When gear 161 rotates, gear 2 163 will also rotate through the crossbar due to the meshing, which in turn will cause gear 3 164 to rotate. One side of the output end of the secondary reducer body 11 extends to the outside of the mounting bracket 162, and gear 4 165 is fixedly connected to this end.

[0027] In more detail, gear 4 165 meshes with gear 3 164. When gear 3 164 rotates, gear 4 165 also rotates through the output end of the secondary reducer body 11 due to meshing. The size of gear 4 165 is larger than that of gear 3 164, and the size of gear 1 161 is smaller than that of gear 2 163. Through the design of gears of different sizes, the effect of two-stage reduction is achieved, making the entire device more stable and reliable in transmitting torque.

[0028] In more detail, the worm 166 is fixedly installed on the output end of the secondary reducer body 11. The worm 166 and the gear 165 are coaxially connected. When the output end of the secondary reducer body 11 rotates, it will also drive the worm 166 to rotate. The worm wheel 167 is rotatably installed inside the secondary reducer body 11. The ring 168 is fixedly installed in the middle of the worm wheel 167. The worm wheel 167 meshes with the worm 166. When the worm 166 rotates, the meshing will cause the worm wheel 167 to drive the ring 168 to rotate.

[0029] In more detail, a through groove is provided on the body 11 of the secondary reducer, and a circular groove of the same size as the ring 168 is provided on the through groove. The ring 168 is located in the circular groove and can rotate in the circular groove. The threaded rod 14 is located in the through groove.

[0030] In more detail, the inner diameter of the ring 168 is provided with a threaded groove that is compatible with the threaded rod 14. The threaded rod 14 is threadedly connected to the threaded groove. The threaded groove can limit the movement of the threaded rod 14. Only when the threaded groove rotates can the threaded rod 14 be raised or lowered through engagement. The rotating ring 168 and the threaded groove enable the threaded rod 14 to be raised or lowered.

[0031] In use, by starting the servo motor 13, the input end of the first-stage reducer 12 is driven to rotate. Through the internal transmission of the first-stage reducer 12, the output end of the first-stage reducer 12 is also driven to rotate. The output end of the first-stage reducer 12 drives the input end of the second-stage reducer body 11 to rotate. The input end of the second-stage reducer body 11 drives gear 161 to rotate. At the same time, through meshing, gear 2 163 also rotates through the crossbar, which in turn causes gear 3 164 to rotate. When gear 3 164 rotates, through meshing, gear 4 165 also rotates through the output end of the second-stage reducer body 11, which in turn drives worm gear 166 to rotate. Through meshing, worm wheel 167 also drives ring 168 to rotate, which in turn causes the threaded groove to rotate within the groove. At the same time, the threaded rod 14 drives the weighing sensor 15 to rise and fall.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A dynamometer output torque detection device characterized by comprising: Including base (10), the top end of base (10) is fixedly installed with two-stage reducer body (11) and primary reducer (12) respectively, the input end of two-stage reducer body (11) is fixedly connected with the output end of primary reducer (12), the input end of primary reducer (12) is fixedly connected with the output end of servo motor (13), screw rod (14) is arranged on two-stage reducer body (11), weighing sensor (15) is installed at the top of screw rod (14) by rotating shaft, the inside of two-stage reducer body (11) is further equipped with drive assembly (16) that can drive screw rod (14) to drive weighing sensor (15) to lift.

2. The output torque detection device of a dynamometer according to claim 1, characterized by, The drive assembly (16) includes a gear one (161) fixedly installed on the input end of the two-stage reducer body (11), a mounting bracket (162) fixedly installed inside the two-stage reducer body (11), a crossbar rotatably installed on the mounting bracket (162), a gear two (163) and a gear three (164) fixedly installed on the crossbar respectively.

3. The output torque detection device of a dynamometer according to claim 2, characterized by, The gear one (161) and the gear two (163) are engaged, one side of the output end of the two-stage reducer body (11) extends to the outside of the mounting bracket (162), and the end is fixedly connected with a gear four (165).

4. The output torque detection device of a dynamometer according to claim 3, characterized by The gear four (165) is engaged with the gear three (164), and the size of the gear four (165) is greater than that of the gear three (164), and the size of the gear one (161) is less than that of the gear two (163).

5. The output torque detection device of a dynamometer according to claim 3, characterized by A worm (166) is fixedly installed on the output end of the two-stage reducer body (11), a worm wheel (167) is rotatably installed inside the two-stage reducer body (11), a circular ring (168) is fixedly installed on the middle part of the worm wheel (167), and the worm wheel (167) is engaged with the worm (166).

6. The output torque detection device of a dynamometer according to claim 5, characterized by A through groove is formed in the two-stage reducer body (11), a circular groove with the same size as the circular ring (168) is formed in the through groove, the circular ring (168) is located in the circular groove, and the screw rod (14) is located in the through groove.

7. The output torque detection device of a dynamometer according to claim 6, characterized by A threaded groove is formed in the inner diameter of the circular ring (168) and is threadedly connected with the screw rod (14).

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