A transmission case rotating shaft torque test device simulating extreme load

Abstract

The invention discloses a transmission case rotating shaft torque test device for simulating extreme loads, which relates to the technical field of sensor detection, and comprises a transmission case unit to be detected, wherein the transmission case unit is composed of a generator, a motor shaft, a coupling, an output shaft and a diesel engine unit. The device also comprises a loading platform and a lifting platform, wherein a driving wheel unit is arranged on the loading platform, and the transmission case unit to be detected is placed on the loading platform. A plurality of lifting hydraulic cylinders are arranged at the bottom of the lifting platform, and a first transmission unit and a second transmission unit are slidingly arranged on the lifting platform, wherein the first transmission unit and the second transmission unit are in contact with the transmission case unit, and a detection component is arranged between the first transmission unit and the second transmission unit, and the detection component detects the torque of the output shaft. The invention realizes the measurement of the output shaft torque without dismantling the transmission case, thereby improving the detection efficiency of the transmission case and facilitating the inspection and maintenance of operators.

Description

Technical Field

[0001] The invention relates to the technical field of sensor detection, in particular to a transmission case rotating shaft torque testing device for simulating an extreme load. Background Art

[0002] For the current power units, the most important load-bearing components need to be load tested and calibrated before assembly, because no performance test is performed after the installation is completed. After the installation is used for a period of time, the combined influence of environmental humidity, acidity and alkalinity, load characteristics and temperature will cause wear to the load-bearing components. This wear is almost irreversible, such as unstable working performance of the transmission box, loss of function, failure of the cooling system, and accidents such as cylinder pulling due to excessive body temperature. Therefore, such equipment can only operate safely within the specified life span, and regular maintenance is an important guarantee for the safe operation of power equipment within the specified life span. Since each maintenance requires installation, disassembly and debugging, it causes an increase in maintenance costs and an increase in maintenance cycles, which greatly reduces the utilization rate. There is a lack of equipment that can detect the working performance of the transmission box without major installation and disassembly. Summary of the invention

[0003] The object of the present invention is to provide a transmission case rotating shaft torque testing device simulating an extreme load, so as to solve the problems raised in the prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a transmission case rotating shaft torque testing device simulating an extreme load, comprising a transmission case unit to be tested, the transmission case unit consisting of a generator, a motor shaft, a coupling, an output shaft and a diesel unit, the device also comprising a loading platform and a lifting platform, a driving wheel group is arranged on the loading platform, the transmission case unit to be tested is placed on the loading platform, a plurality of lifting hydraulic cylinders are arranged at the bottom of the lifting platform, a first transmission unit and a second transmission unit are slidingly arranged on the lifting platform, the first transmission unit and the second transmission unit are in contact with the transmission case unit, a detection component is arranged between the first transmission unit and the second transmission unit, the detection component detects the torque of the output shaft, before performing a torque test, an operator first fixes the transmission case unit to the loading platform, drives the wheel group to move the loading platform, moves the transmission case unit to the top of the lifting platform, the first transmission unit is in contact with the output shaft, the second transmission unit is in contact with the motor shaft, and the detection component detects the torque of the shaft.

[0005] Furthermore, the lifting platform is symmetrically provided with two slide grooves, the first transmission unit is arranged in the slide groove on the side of the lifting platform close to the diesel unit, and the second transmission unit is arranged in the slide groove on the side of the lifting platform close to the generator, and the first transmission unit and the second transmission unit have the same structure.

[0006] Furthermore, the first transmission unit includes an adjusting slide block, a first swing arm and a second swing arm are rotatably arranged in the adjusting slide block, and a conical tooth groove is coaxially arranged at the junction of the first swing arm and the second swing arm and the adjusting slide block, a servo motor is installed in the adjusting slide block, a driving bevel gear is installed on the servo motor, and the driving bevel gear is meshed with the conical tooth grooves on the first swing arm and the second swing arm, and a curved hydraulic cylinder is installed on the side of the first swing arm and the second swing arm away from the driving bevel gear. When the diesel unit is started, the output shaft drives the motor shaft to rotate, and the servo motor drives the driving bevel gear to rotate. Since the contact directions of the driving bevel gear and the conical tooth grooves on the first swing arm and the second swing arm are opposite, the swing directions of the first swing arm and the second swing arm are also opposite, that is, there is a fan-shaped opening and closing movement between the two, and the hydraulic oil in the curved hydraulic cylinder enters the double-headed hydraulic cylinder through the hydraulic pipeline, and the support block on the double-headed hydraulic cylinder supports the adjusting slide block, so that the position of the first transmission unit and the second transmission unit is fixed.

[0007] Furthermore, a friction wheel is rotatably installed on the piston rod of each of the curved hydraulic cylinders, and a return spring is arranged inside each of the curved hydraulic cylinders. Double-head hydraulic cylinders are arranged on both sides of the adjusting slide block, and blocks are arranged on the piston rods on both sides of the double-head hydraulic cylinder. A hydraulic pipeline is connected between each of the double-head hydraulic cylinders and the adjacent curved hydraulic cylinders. The control system adjusts the height of the lifting platform through the lifting hydraulic cylinder, and the first swing arm and the second swing arm drive the curved hydraulic cylinder to move toward the output shaft until the friction wheel contacts the output shaft. As the first swing arm and the second swing arm continue to swing, the return spring in the curved hydraulic cylinder is compressed, and the friction wheel and the output shaft are pressed tightly. Since the position of the output shaft is fixed, during the pressing process, the adjusting slide block passively slides on the lifting platform, and the extrusion force of the two friction wheels and the output shaft is kept consistent. When the output shaft rotates, even if it is necessary to drive the two friction wheels to rotate at the same time, the friction wheels symmetrically contacting on both sides will balance the radial force generated on the output shaft, thereby minimizing the factors affecting the torque measurement of the output shaft.

[0008] The cam is an axially mounted on one side of the first and second sprocket wheels, and the cam is actuated by a plurality of coupling rollers connected to the first and second sprocket wheels.

[0009] Furthermore, the detection component includes a pair of output bevel gears, a pair of conductive rings and a sliding block, the pair of output bevel gears are respectively installed on the rotating shafts in the first transmission unit and the second transmission unit, the sliding block is slidably connected to the lifting platform, the pair of conductive rings are installed on the sliding block, and the pair of conductive rings are located on the outside of the pair of output bevel gears.

[0010] Furthermore, the detection component includes a rotating frame and a pair of differential bevel gears, the rotating frame is rotatably installed in the middle of a pair of conductive rings, the pair of differential bevel gears are rotatably installed on the rotating frame, the pair of differential bevel gears are symmetrically arranged, and a coil spring is arranged at the junction of the pair of differential bevel gears and the rotating frame, and the pair of differential bevel gears are meshed with two output bevel gears. Since the rotating frame can only rotate in the conductive ring, under the constraint of the elastic force of the coil spring, no relative rotation occurs between the differential bevel gear and the rotating frame. When the rotation speeds of the two synchronous sprockets remain synchronized, the rotation speeds and directions of the two output bevel gears are the same, then the differential bevel gear will not rotate, but will be moved together with the rotation of the output bevel gear. The rotating frame rotates in the conductive ring. If the output shaft and the motor shaft are twisted at this time, it means that the torque of the output shaft is increasing, which further causes a differential between the two output bevel gears. The differential bevel gear overcomes the elastic force of the coil spring, and then the differential bevel gear twists relative to the rotating frame.

[0011] Furthermore, a sliding rheostat is provided on one side of the rotating frame, and two sliding contacts are slidably installed on the sliding rheostat. A displacement transfer block is installed at one end of one of the differential bevel gears, and two inclined grooves are opened on the displacement transfer block. The two sliding contacts pass through the inclined grooves respectively, and the two sliding contacts are in contact with two conductive rings respectively. When the differential bevel gear is twisted, the displacement transfer block is driven to rotate, and the displacement transfer block uses the inclined groove to push the two sliding contacts to slide on the sliding rheostat during the rotation process. Since the two conductive rings are connected to the control system circuit, no matter what position the rotating frame rotates to, the sliding contact is always in contact with the conductive The ring remains in contact, and after the sliding contact on the sliding rheostat moves, the resistance value in the circuit changes, and the current changes when the voltage remains unchanged. Before starting the measurement, the operator will analyze the relationship between the shaft torque and the torsional displacement based on the material, so that the torque applied to the shaft at this time can be judged by the torsional displacement of the shaft. The torsional displacement of the shaft is converted into a factor that changes the sliding rheostat through the differential bevel gear. When the voltage in the circuit remains unchanged, there is a definite relationship between the current and the resistance. Therefore, the change of the current in the circuit connected to the control system can clearly feedback the torsional displacement of the shaft, and further calculate the torque value.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] By setting up the detection component, the slight torsional displacement between the output shaft and the motor shaft is converted into the differential rotation of the two output bevel gears, which further drives the differential bevel gears to deflect. The deflection of the differential bevel gears is converted into the relative movement of the sliding contacts on the sliding rheostat, thereby changing the resistance value in the circuit. The change of the current in the circuit can clearly feedback the torsional displacement of the shaft and calculate the torque value. The present invention can measure the output shaft torque without dismantling the transmission box, thereby improving the detection efficiency of the transmission box and facilitating the inspection and maintenance of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall appearance structure of the present invention is shown in FIG. Figure 1 ;

[0015] Figure 2 The overall appearance structure of the present invention is shown in FIG. Figure 2 ;

[0016] Figure 3 The structure of the lifting seat of the present invention is schematically shown in FIG. Figure 1 ;

[0017] Figure 4 The structure of the lifting seat of the present invention is schematically shown in FIG. Figure 2 ;

[0018] Figure 5The structure of the lifting seat of the present invention is schematically shown in FIG. Figure 3 ;

[0019] Figure 6 It is a schematic diagram of the internal structure of the lifting seat of the present invention;

[0020] Figure 7 It is a schematic diagram of the installation structure of the differential bevel gear of the present invention;

[0021] In the figure: 1. generator; 2. motor shaft; 3. coupling; 4. output shaft; 5. diesel engine; 6. loading platform; 7. lifting platform; 8. lifting hydraulic cylinder; 9. first transmission unit; 10. second transmission unit; 11. adjusting slide block; 12. first swing arm; 13. second swing arm; 14. curved hydraulic cylinder; 15. friction wheel; 16. first sprocket; 17. second sprocket; 18. chain; 19. synchronous sprocket; 20. rotating shaft; 21. servo motor; 22. driving bevel gear; 23. output bevel gear; 24. rotating frame; 25. differential bevel gear; 26. displacement transfer block; 27. sliding contact; 28. conductive ring; 29. ​​sliding block; 30. double-head hydraulic cylinder. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example: Figure 1-Figure 7 As shown, the present invention provides a technical solution, a transmission case rotating shaft torque test device simulating an extreme load, comprising a transmission case unit to be tested, the transmission case unit consisting of a generator 1, a motor shaft 2, a coupling 3, an output shaft 4 and a diesel unit 5, the device also comprising a loading platform 6 and a lifting platform 7, a driving wheel group is arranged on the loading platform 6, the transmission case unit to be tested is placed on the loading platform 6, a plurality of lifting hydraulic cylinders 8 are arranged at the bottom of the lifting platform 7, a first transmission unit 9 and a second transmission unit 10 are slidingly arranged on the lifting platform 7, the first transmission unit 9 and the second transmission unit 10 are in contact with the transmission case unit, a detection component is arranged between the first transmission unit 9 and the second transmission unit 10, the detection component detects the torque of the output shaft 4, before performing the torque test, the operator first fixes the transmission case unit to the loading platform 6, the driving wheel group moves the loading platform 6, moves the transmission case unit to the top of the lifting platform 7, the first transmission unit 9 is in contact with the output shaft 4, the second transmission unit 10 is in contact with the motor shaft 2, and the detection component detects the torque of the shaft.

[0024] There are two chute slits symmetrically arranged on the lifting platform 7, the first transmission unit 9 is arranged in the chute on the side of the lifting platform 7 close to the diesel unit 5, and the second transmission unit 10 is arranged in the chute on the side of the lifting platform 7 close to the generator 1. The first transmission unit 9 has the same structure as the second transmission unit 10. The first transmission unit 9 includes an adjusting chute block 11, in which a first swing arm 12 and a second swing arm 13 are rotatably arranged, and a conical tooth groove is coaxially arranged at the transition between the first swing arm 12 and the second swing arm 13 and the adjusting chute block 11, and a servo motor 21 is installed in the adjusting chute block 11, and a driving bevel gear 22 is installed on the servo motor 21, and the driving bevel gear 22 is connected to the conical gears on the first swing arm 12 and the second swing arm 13. The first swing arm 12 and the second swing arm 13 are meshed with each other, and a curved hydraulic cylinder 14 is installed on the side of the first swing arm 12 and the second swing arm 13 away from the driving bevel gear 22. The diesel engine 5 is started, and the output shaft 4 drives the motor shaft 2 to rotate, and the servo motor 21 drives the driving bevel gear 22 to rotate. Since the contact directions of the driving bevel gear 22 and the conical tooth grooves on the first swing arm 12 and the second swing arm 13 are opposite, the swing directions of the first swing arm 12 and the second swing arm 13 are also opposite, that is, there is a fan-shaped opening and closing movement between the two. The hydraulic oil in the curved hydraulic cylinder 14 enters the double-headed hydraulic cylinder 30 through the hydraulic pipeline, and the support block on the double-headed hydraulic cylinder 30 supports the adjusting slide block 11, so that the positions of the first transmission unit 9 and the second transmission unit 10 are fixed.

[0025] A friction wheel 15 is rotatably mounted on the piston rod of each curved hydraulic cylinder 14, a return spring is arranged inside each curved hydraulic cylinder 14, double-headed hydraulic cylinders 30 are arranged on both sides of the adjusting slide block 11, and abutment blocks are arranged on the piston rods on both sides of the double-headed hydraulic cylinder 30, and a hydraulic pipeline (not shown) is connected between each double-headed hydraulic cylinder 30 and the adjacent curved hydraulic cylinder 14, and the control system adjusts the height of the lifting platform 7 through the lifting hydraulic cylinder 8, and the first swing arm 12 and the second swing arm 13 drive the curved hydraulic cylinder 14 to move toward the output shaft 4 until the friction wheel 15 and the output shaft 4 are in contact. The first swing arm 12 and the second swing arm 13 are in contact with each other. As the first swing arm 12 and the second swing arm 13 continue to swing, the return spring in the curved hydraulic cylinder 14 is compressed, and the friction wheel 15 is pressed tightly against the output shaft 4. Since the position of the output shaft 4 is fixed, during the pressing process, the slide block 11 is adjusted to slide passively on the lifting platform 7, and the extrusion force of the two friction wheels 15 and the output shaft 4 is kept consistent. When the output shaft 4 rotates, even if it is necessary to drive the two friction wheels 15 to rotate at the same time, the friction wheels 15 symmetrically contacting on both sides will balance the radial force generated on the output shaft 4, thereby minimizing the factors affecting the torque measurement of the output shaft 4.

[0026] A first sprocket 16 is coaxially mounted on one side of the friction wheel 15 mounted on the first swing arm 12, a second sprocket 17 is coaxially mounted on one side of the friction wheel 15 mounted on the second swing arm 13, a synchronous sprocket 19 is mounted for internal rotation of the adjusting slide block 11, the first sprocket 16 and the second sprocket 17 are connected to the synchronous sprocket 19 through a chain 18, a rotating shaft 20 is connected to one side of the synchronous sprocket 19, one end of the rotating shaft 20 passes through the adjusting slide block 11, the detection component includes a pair of output bevel gears 23, a pair of conductive rings 28 and a sliding block 29, the pair of output bevel gears 23 are respectively mounted on the first transmission unit 9 On the rotating shaft 20 in the second transmission unit 10, the sliding block 29 is slidably connected with the lifting platform 7, a pair of conductive rings 28 are installed on the sliding block 29, and the pair of conductive rings 28 are located on the outside of the pair of output bevel gears 23. The detection component includes a rotating frame 24 and a pair of differential bevel gears 25. The rotating frame 24 is rotatably installed in the middle of the pair of conductive rings 28, and the pair of differential bevel gears 25 are rotatably installed on the rotating frame 24. The pair of differential bevel gears 25 are symmetrically arranged, and a coil spring is arranged at the transition between the pair of differential bevel gears 25 and the rotating frame 24. The pair of differential bevel gears 25 are both meshed with the two output bevel gears 23.

[0027] The two friction wheels 15 in contact with the output shaft 4 rotate in the same direction and speed, and the first sprocket 16 and the second sprocket 17 rotate in the same direction and speed, that is, the first sprocket 16 and the second sprocket 17 can simultaneously drive the synchronous sprocket 19 to rotate through the chain 18 respectively, and the synchronous sprocket 19 is driven by the two chains 18 to feedback the rotation speed of the output shaft 4, which effectively avoids the slip of one of the friction wheels 15 and causes the speed output to be unstable. The synchronous sprocket 19 in the second transmission unit 10 feeds back the rotation speed of the motor shaft 2. When the rotation speed of the motor shaft 2 is synchronized with the output shaft 4, the rotation speeds of the two synchronous sprockets 19 are also synchronized. Since the rotating frame 24 can only be in the conductive ring 28 Rotation, under the restraint of the coil spring elastic force, there is no relative rotation between the differential bevel gear 25 and the rotating frame 24. When the speeds of the two synchronous sprockets 19 remain synchronized, the speeds and directions of the two output bevel gears 23 are the same, then the differential bevel gear 25 will not rotate, but will be moved along with the rotation of the output bevel gear 23. The rotating frame 24 rotates in the conductive ring 28. If the output shaft 4 and the motor shaft 2 are twisted at this time, it means that the torque of the output shaft 4 is increasing, which further causes a differential between the two output bevel gears 23. The differential bevel gear 25 overcomes the elastic force of the coil spring, and then the differential bevel gear 25 twists relative to the rotating frame 24.

[0028] A sliding rheostat is provided on one side of the rotating frame 24, on which two sliding contacts 27 are slidably mounted, and a displacement transfer block 26 is mounted on one end of a differential bevel gear 25. Two inclined grooves are provided on the displacement transfer block 26, through which the two sliding contacts 27 respectively pass, and the two sliding contacts 27 respectively contact with two conductive rings 28. When the differential bevel gear 25 is twisted, the displacement transfer block 26 is driven to rotate, and the displacement transfer block 26 uses the inclined groove to push the two sliding contacts 27 to slide on the sliding rheostat during the rotation process. Since the two conductive rings 28 are connected to the control system circuit, no matter where the rotating frame 24 rotates to, the sliding contact 27 always moves. Finally, it keeps contact with the conductive ring 28, and after the sliding contact 27 on the sliding rheostat moves, the resistance value in the circuit changes, and the current changes when the voltage remains unchanged. Before starting the measurement, the operator will analyze the relationship between the shaft torque and the torsional displacement based on the material, so that the torque applied to the shaft at this time can be judged by the torsional displacement of the shaft. The torsional displacement of the shaft is converted into a factor for changing the sliding rheostat through the differential bevel gear 25. When the voltage in the circuit remains unchanged, there is a definite relationship between the current and the resistance. Therefore, the change of the current in the circuit connected to the control system can clearly feedback the torsional displacement of the shaft, and further calculate the torque value.

[0029] By setting the detection component, the slight torsional displacement between the output shaft 4 and the motor shaft 2 is converted into the differential rotation of the two output bevel gears 23, which further drives the differential bevel gear 25 to deflect. The deflection of the differential bevel gear 25 is converted into the relative movement of the sliding contacts 27 on the sliding rheostat, thereby changing the resistance value in the circuit. The change of the current in the circuit can clearly feedback the torsional displacement of the shaft and calculate the torque value. The present invention can measure the torque of the output shaft 4 without dismantling the transmission box, thereby improving the detection efficiency of the transmission box and facilitating the operator to carry out inspection and maintenance.

[0030] The working principle of the present invention is as follows: before conducting a torque test, the operator first fixes the transmission box unit to the loading platform 6, drives the wheel group to move the loading platform 6, moves the transmission box unit to the top of the lifting platform 7, the first transmission unit 9 contacts the output shaft 4, the second transmission unit 10 contacts the motor shaft 2, the detection component detects the torque of the shaft, starts the diesel unit 5, the output shaft 4 drives the motor shaft 2 to rotate, and the servo motor 21 drives the driving bevel gear 22 to rotate. Since the contact directions of the driving bevel gear 22 and the conical tooth grooves on the first swing arm 12 and the second swing arm 13 are opposite, the swing directions of the first swing arm 12 and the second swing arm 13 are also opposite, that is, there is a fan-shaped opening and closing movement between the two, and the hydraulic oil in the curved hydraulic cylinder 14 enters the double-headed hydraulic cylinder 30 through the hydraulic pipeline. The support block on the double-headed hydraulic cylinder 30 supports the adjusting slide block 11, so that the position of the first transmission unit 9 and the second transmission unit 10 is fixed.

[0031] The control system adjusts the height of the lifting platform 7 through the lifting hydraulic cylinder 8. The first swing arm 12 and the second swing arm 13 drive the curved hydraulic cylinder 14 to move toward the output shaft 4 until the friction wheel 15 contacts the output shaft 4. As the first swing arm 12 and the second swing arm 13 continue to swing, the return spring in the curved hydraulic cylinder 14 is compressed, and the friction wheel 15 and the output shaft 4 are pressed tightly. Since the position of the output shaft 4 is fixed, during the pressing process, the adjustment slide block 11 slides passively on the lifting platform 7, and the extrusion force of the two friction wheels 15 and the output shaft 4 is kept consistent. When the output shaft 4 rotates, even if it is necessary to drive the two friction wheels 15 to rotate at the same time, the friction wheels 15 that are symmetrically in contact on both sides will balance the radial force generated on the output shaft 4, thereby minimizing the factors affecting the torque measurement of the output shaft 4.

[0032] The two friction wheels 15 in contact with the output shaft 4 rotate in the same direction and speed, and the first sprocket 16 and the second sprocket 17 rotate in the same direction and speed, that is, the first sprocket 16 and the second sprocket 17 can simultaneously drive the synchronous sprocket 19 to rotate through the chain 18 respectively, and the synchronous sprocket 19 is driven by the two chains 18 to feedback the rotation speed of the output shaft 4, which effectively avoids the slip of one of the friction wheels 15 and causes the speed output to be unstable. The synchronous sprocket 19 in the second transmission unit 10 feeds back the rotation speed of the motor shaft 2. When the rotation speed of the motor shaft 2 is synchronized with the output shaft 4, the rotation speeds of the two synchronous sprockets 19 are also synchronized. Since the rotating frame 24 can only be in the conductive ring 28 Rotation, under the restraint of the coil spring elastic force, there is no relative rotation between the differential bevel gear 25 and the rotating frame 24. When the speeds of the two synchronous sprockets 19 remain synchronized, the speeds and directions of the two output bevel gears 23 are the same, then the differential bevel gear 25 will not rotate, but will be moved along with the rotation of the output bevel gear 23. The rotating frame 24 rotates in the conductive ring 28. If the output shaft 4 and the motor shaft 2 are twisted at this time, it means that the torque of the output shaft 4 is increasing, which further causes a differential between the two output bevel gears 23. The differential bevel gear 25 overcomes the elastic force of the coil spring, and then the differential bevel gear 25 twists relative to the rotating frame 24.

[0033] The differential bevel gear 25 drives the displacement block 26 to rotate when torsion occurs. During the rotation process, the displacement block 26 uses the inclined groove to push the two sliding contacts 27 to slide on the sliding rheostat. Since the two conductive rings 28 are connected to the control system circuit, no matter what position the rotating frame 24 rotates to, the sliding contact 27 always keeps in contact with the conductive ring 28. After the sliding contact 27 on the sliding rheostat moves, the resistance value in the circuit changes, and the current changes when the voltage remains unchanged. Before starting the measurement, the operator will analyze the relationship between the shaft torque and the torsional displacement based on the material, so that the torque applied to the shaft at this time can be judged by the torsional displacement of the shaft. The torsional displacement of the shaft is converted into a factor for changing the sliding rheostat through the differential bevel gear 25. When the voltage in the circuit remains unchanged, there is a definite relationship between the current and the resistance. Therefore, the change of the current in the circuit connected to the control system can clearly feedback the torsional displacement of the shaft, and further calculate the torque value.

[0034] By setting the detection component, the slight torsional displacement between the output shaft 4 and the motor shaft 2 is converted into the differential rotation of the two output bevel gears 23, which further drives the differential bevel gear 25 to deflect. The deflection of the differential bevel gear 25 is converted into the relative movement of the sliding contacts 27 on the sliding rheostat, thereby changing the resistance value in the circuit. The change of the current in the circuit can clearly feedback the torsional displacement of the shaft and calculate the torque value. The present invention can measure the torque of the output shaft 4 without dismantling the transmission box, thereby improving the detection efficiency of the transmission box and facilitating the operator to carry out inspection and maintenance.

[0035] It will be apparent to those skilled in the art that the 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 the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A transmission case rotating shaft torque test device simulating an extreme load, characterized in that: The invention comprises a loading platform (6) and a lifting platform (7), wherein a driving wheel group is arranged on the loading platform (6), a transmission box unit to be tested is placed on the loading platform (6), a plurality of lifting hydraulic cylinders (8) are arranged at the bottom of the lifting platform (7), a first transmission unit (9) and a second transmission unit (10) are slidably arranged on the lifting platform (7), the first transmission unit (9) and the second transmission unit (10) are in contact with the transmission box unit, a detection component is arranged between the first transmission unit (9) and the second transmission unit (10), the detection component detects the torque of the transmission box unit shaft, and the first transmission unit (9) and the second transmission unit (10) have the same structure; The first transmission unit (9) comprises an adjusting slide block (11), a first swing arm (12) and a second swing arm (13) being rotatably arranged in the adjusting slide block (11), and a conical tooth groove being coaxially arranged at a junction between the first swing arm (12) and the second swing arm (13) and the adjusting slide block (11); The detection assembly comprises a pair of output bevel gears (23), a pair of conductive rings (28) and a sliding block (29); the pair of output bevel gears (23) are respectively mounted on the rotating shafts (20) in the first transmission unit (9) and the second transmission unit (10); the sliding block (29) is slidably connected to the lifting platform (7); the pair of conductive rings (28) are mounted on the sliding block (29); and the pair of conductive rings (28) are located outside the pair of output bevel gears (23); The detection assembly comprises a rotating frame (24) and a pair of differential bevel gears (25); the rotating frame (24) is rotatably mounted on the middle of a pair of conductive rings (28); the pair of differential bevel gears (25) are rotatably mounted on the rotating frame (24); the pair of differential bevel gears (25) are symmetrically arranged; a coil spring is arranged at a junction between the pair of differential bevel gears (25) and the rotating frame (24); and the pair of differential bevel gears (25) are both meshed with two output bevel gears (23); A sliding rheostat is provided on one side of the rotating frame (24), and two sliding contacts (27) are slidably mounted on the sliding rheostat. A displacement block (26) is mounted on one end of the differential bevel gear (25), and two inclined grooves are provided on the displacement block (26). The two sliding contacts (27) respectively pass through the inclined grooves, and the two sliding contacts (27) respectively contact two conductive rings (28).

2. The transmission case rotating shaft torque testing device simulating the limit load according to claim 1, characterized in that: The lifting platform (7) is symmetrically provided with two slide grooves, and the first transmission unit (9) and the second transmission unit (10) are symmetrically arranged in the two slide grooves of the lifting platform (7).

3. The transmission case rotating shaft torque testing device simulating the limit load according to claim 2, characterized in that: A servo motor (21) is installed in the adjusting slide block (11), a driving bevel gear (22) is installed on the servo motor (21), the driving bevel gear (22) is meshed with conical tooth grooves on the first swing arm (12) and the second swing arm (13), and a curved hydraulic cylinder (14) is installed on the side of the first swing arm (12) and the second swing arm (13) away from the driving bevel gear (22).

4. The transmission case rotating shaft torque testing device simulating an extreme load according to claim 3, characterized in that: A friction wheel (15) is rotatably mounted on the piston rod of each of the curved hydraulic cylinders (14), a return spring is arranged inside each of the curved hydraulic cylinders (14), double-headed hydraulic cylinders (30) are arranged on both sides of the adjusting slide block (11), and abutment blocks are installed on the piston rods on both sides of the double-headed hydraulic cylinders (30), and a hydraulic pipeline is connected between each of the double-headed hydraulic cylinders (30) and the adjacent curved hydraulic cylinders (14).

5. The transmission case rotating shaft torque testing device simulating the ultimate load according to claim 4, characterized in that: A first sprocket (16) is coaxially mounted on one side of the friction wheel (15) mounted on the first swing arm (12), and a second sprocket (17) is coaxially mounted on one side of the friction wheel (15) mounted on the second swing arm (13). A synchronous sprocket (19) is rotatably mounted inside the adjusting chute block (11), and the first sprocket (16) and the second sprocket (17) are both connected to the synchronous sprocket (19) via a chain (18). A rotating shaft (20) is connected to one side of the synchronous sprocket (19), and one end of the rotating shaft (20) passes through the adjusting chute block (11).

Images