A test device for a torque motor

Abstract

The application discloses a kind of test devices for torque motor, including bottom plate, push box and installation body are arranged on bottom plate, telescopic frame and control panel are arranged on push box, sealing cylinder is arranged on telescopic frame, piston plate is arranged in sealing cylinder, pressure sensor is arranged on one side of piston plate, test spring is arranged on pressure sensor, test spring is connected with telescopic frame, support frame is arranged on the other side of piston plate, coupling, rotational speed sensor and fixed plate are arranged on support frame. By improving the traditional motor detection equipment, sealing cylinder and piston plate are set, the air pressure in the sealing cylinder is reduced by moving the piston plate, and the sealing of the motor housing to be tested is detected according to the pressure maintaining condition of the sealing cylinder. By setting test spring and pressure sensor, different function sensors are set on the sealing cylinder, and the different functions of the motor can be detected by sensor monitoring data combined with calculation formula.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electrode detection equipment, and particularly relates to a testing device for a torque motor. BACKGROUND

[0002] Motor detection is to detect the load and safety performance of a finished motor after the motor manufacturing process.

[0003] Some special-purpose motors also need to detect the air tightness of the assembled motor shell, but the existing motor detection equipment mostly detects only the load performance, speed, power and safety, and has no air tightness detection capability for the motor. If the air tightness of the motor is to be detected, special equipment needs to be replaced, resulting in a complicated detection process and seriously affecting the detection efficiency of the motor.

[0004] Therefore, we need to design a testing device for a torque motor to solve these problems. SUMMARY

[0005] The present application aims to provide a testing device for a torque motor.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is as follows:

[0007] A testing device for a torque motor, comprising a bottom plate, a push box and a mounting body are arranged on the bottom plate, a telescopic frame and a control panel are arranged on the push box, a sealing cylinder is arranged on the telescopic frame, a piston plate is arranged in the sealing cylinder, a pressure sensor is arranged on one side of the piston plate, a test spring is arranged on the pressure sensor, the test spring is connected with the telescopic frame, a support frame is arranged on the other side of the piston plate, a shaft coupling, a speed sensor and a fixed plate are arranged on the support frame, the input end of the speed sensor is connected with the shaft coupling, the fixed plate is located below the shaft coupling, an air pressure monitoring device is arranged on the cylinder wall of the sealing cylinder located on one side of the support frame, the air pressure monitoring device, the speed sensor and the pressure sensor are electrically connected with the control panel, an extension rod is arranged on the side wall of the mounting body, the extension rod is coaxial with the shaft coupling, one end of the extension rod is connected with the shaft coupling in a matched mode, and the other end of the extension rod is fixedly provided with a lead screw, a threaded sleeve is sleeved on the lead screw in a matched mode, and the threaded sleeve and the lead screw are matched with each other.

[0008] Preferably, the telescopic frame is provided with a limiting slot, a rotating shaft is arranged in the limiting slot, one end of the rotating shaft is fixedly provided with a torsional spring, and the other end is fixedly provided with a connecting rod, the free end of the connecting rod is fixedly provided with a mounting frame outside the limiting slot, the sealing cylinder is connected with the telescopic frame through the mounting frame, and a turnover frame is further arranged on the connecting rod, a turnover block is fixedly arranged on the push box on one side of the telescopic frame, and the turnover block and the turnover frame are matched with each other, when the telescopic frame is retracted into the push box, the turnover frame is in contact with the turnover block, and the connecting rod is rotated around the rotating shaft.

[0009] In this way, the connecting rod can always be in the correct position after rotation, and the normal work and operation of the equipment are ensured.

[0010] Preferably, a limiting guide rod is arranged through the mounting frame, one end of the limiting guide rod is connected with the piston plate, and the other end is fixedly provided with a limiting plate, the test spring is sleeved on the limiting guide rod, one end of the test spring is connected with the mounting frame through a spring seat, and the other end is connected with the pressure sensor on the piston plate.

[0011] In this way, the movement distance of the piston plate can be limited, and the support frame can be prevented from sliding out of the sealing cylinder.

[0012] Preferably, a sealing gasket is arranged on the surface of the mounting body opposite to the sealing cylinder, the telescopic rod is located inside the sealing gasket, and the sealing gasket is matched with the sealing cylinder.

[0013] In this way, the sealing property of the sealing cylinder after being in contact with the mounting body can be ensured, and the accuracy of the detection result is improved.

[0014] Preferably, an adjusting groove is arranged on the support frame, a fixed nut is slidably arranged on the adjusting groove, the fixed plate is slidably connected with the support frame through the fixed nut and the adjusting groove, a plurality of lock buckles and a plurality of fixed belts are arranged on the fixed plate, and the positions of the plurality of lock buckles and the plurality of fixed belts are one-to-one corresponding.

[0015] In this way, motors of different sizes can be fixed.

[0016] Preferably, an oil nozzle and an oil cavity are further arranged on the mounting body, the oil nozzle is in communication with the oil cavity, two oil seals are fixedly arranged in the oil cavity, the telescopic rod passes through the inside of the two oil seals and is in sliding sealing with the two oil seals, and a pressing plate is further sleeved on the telescopic rod, the pressing plate is located outside the oil cavity and is connected with the mounting body through threads.

[0017] In this way, the connection between the telescopic rod and the oil seal can be lubricated, the friction between components can be reduced, and the service life can be prolonged.

[0018] Preferably, the coupling and the end of the telescopic rod are fixedly provided with ratchet plates, and the coupling and the telescopic rod are connected with each other through the ratchet plates.

[0019] In this way, the coupling and the telescopic rod can be quickly connected and separated.

[0020] Preferably, the threaded sleeve is composed of at least two components, each of which is provided with a lifting frame, the lifting frame is provided with a driving slot, one side of the lifting frame is provided with a push rod, one end of the push rod is provided with a return spring, the other end of the push rod is opposite to the end of the sealing cylinder after penetrating out of the mounting body, and a driving column is fixedly arranged on the push rod, the free end of the driving column is located in the driving slot and reciprocatingly slides along the driving slot.

[0021] In this way, the components of the threaded sleeve can cooperate with the lead screw when the components are spliced, the lead screw is provided with a pushing force when the lead screw rotates, and the cooperation between the components of the threaded sleeve and the lead screw disappears when the components are separated, so that the telescopic rod can be quickly recovered.

[0022] Preferably, the lifting frame is provided with a buffer hole, a buffer spring and a connecting column are arranged in the buffer hole, one end of the connecting column is connected with the buffer spring, and the other end of the connecting column is connected with the corresponding component after penetrating out of the buffer hole.

[0023] In this way, the components of the threaded sleeve can be stably connected with the lead screw, and the equipment can be prevented from being damaged due to the movement distance exceeding the limit, the components of the threaded sleeve and the lead screw can be prevented from being quickly separated when the sealing cylinder and the mounting body are separated, the stress of the lead screw disappears, and the problem that the test spring pushes the piston plate to quickly rebound can be avoided.

[0024] Preferably, the end of the sealing cylinder opposite to the push rod is fixedly provided with a ring plate.

[0025] In this way, the contact area of the sealing cylinder and the push rod can be increased, and the stable transmission of power can be ensured.

[0026] The present application has the advantages and positive effects that:

[0027] The application improves the traditional motor detection equipment, sets the sealing cylinder and the piston plate, drives the lead screw to rotate by the motor to be detected, moves the piston plate by the lead screw, reduces the air pressure in the sealing cylinder, judges the sealing performance of the motor shell according to the pressure maintaining performance of the sealing cylinder; sets the test spring and the pressure sensor, records the pressure of the test spring by the pressure sensor when the piston plate is moved by the lead screw, calculates the power of the motor to be detected by the torque and thrust calculation formula of the lead screw; detects the maximum rotating speed of the motor to be detected by the rotating speed sensor connected with the shaft coupling; improves the detection efficiency of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 is a schematic view of the sealing cylinder and the mounting body of the present application;

[0030] Figure 2 is a schematic view of the sealing cylinder of the present application;

[0031] Figure 3 is a schematic view of the internal structure of the sealing cylinder of the present application;

[0032] Figure 4 is a schematic view of the cross section of the sealing cylinder and the mounting body of the present application;

[0033] Figure 5 is a schematic view of the structure at A in Figure 4 ;

[0034] Figure 6 is a schematic view of the structure at B in Figure 4 ;

[0035] Figure 7 is a schematic view of the ratchet disc structure of the present application;

[0036] Figure 8 is a schematic view of the cross section of the sealing cylinder and the mounting body of the embodiment 2 of the present application;

[0037] Figure 9 is a schematic view of the screw sleeve and the lead screw of the embodiment 2 of the present application;

[0038] Figure 10 is a schematic view of the screw sleeve and the lead screw of the embodiment 2 of the present application;

[0039] Figure 11 is Figure 8 is an enlarged view of the structure at C in

[0040] Figure 12 is Figure 8 is an enlarged view of the structure at D in

[0041] The reference signs are explained as follows:

[0042] 1, bottom plate; 2, push box; 3, control panel; 4, telescopic frame; 5, connecting rod; 6, sealing cylinder; 7, air pressure monitoring device; 8, ring plate; 9, mounting body; 10, oil nozzle; 11, limiting groove; 12, hydraulic cylinder; 13, turnover block; 14, rotating shaft; 15, torsional spring; 16, limiting plate; 17, turnover frame; 18, mounting frame; 19, limiting guide rod; 20, test spring; 21, piston plate; 22, support frame; 23, adjusting groove; 24, shaft coupling; 25, rotating speed sensor; 26, fixed plate; 27, fixed belt; 28, lock catch; 29, fixed nut; 30, sealing gasket; 31, telescopic rod; 32, oil cavity; 33, pressing plate; 34, oil seal; 35, limiting ring; 36, lead screw; 37, threaded sleeve; 371, assembly; 38, pressure sensor; 39, lifting frame; 40, buffer hole; 41, connecting column; 42, buffer spring; 43, ratchet disc; 44, driving groove; 45, driving column; 46, push rod; 47, return spring. DETAILED DESCRIPTION

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" and the like can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0045] The present invention will be further described below with reference to the accompanying drawings:

[0046] Example 1: As Figures 1-8 As shown, a testing device for a torque motor includes a base plate 1, a push box 2 and a mounting body 9 on the base plate 1, a telescopic frame 4 and a control panel 3 on the push box 2, a sealing cylinder 6 on the telescopic frame 4, a piston plate 21 inside the sealing cylinder 6, a pressure sensor 38 on one side of the piston plate 21, a test spring 20 on the pressure sensor 38, and the test spring 20 connected to the telescopic frame 4; a support frame 22 on the other side of the piston plate 21, a coupling 24, a speed sensor 25 and a fixing plate 26 on the support frame 22, the input end of the speed sensor 25 connected to the coupling 24, and the fixing plate 26 located at... Below the coupling 24, on the wall of the sealing cylinder 6 located on one side of the support frame 22, a pressure monitoring device is installed. The pressure monitoring device, speed sensor 25, and pressure sensor 38 are all electrically connected to the control panel 3. A telescopic rod 31 is installed on the side wall of the mounting body 9. The telescopic rod 31 is coaxial with the coupling 24, and one end is connected to the coupling 24. The other end is fixedly equipped with a lead screw 36. The end of the telescopic rod 31 connected to the lead screw 36 is also equipped with a limit ring 35, which can prevent the telescopic rod 31 from moving beyond the limit position and causing equipment damage. A threaded sleeve 37 is fitted on the lead screw 36, and the threaded sleeve 37 cooperates with the lead screw 36.

[0047] Specifically, the air pressure monitoring device 7 includes an air pressure sensor, a valve, and an air pressure gauge. The air pressure sensor is used to monitor the air pressure inside the sealed cylinder 6, the valve is used to balance the air pressure difference between the sealed cylinder 6 and the outside after the detection is completed, and the pressure gauge can more intuitively display the air pressure inside the sealed cylinder 6.

[0048] like Figure 2As shown, the telescopic frame 4 is provided with a limiting slot 11, a rotating shaft 14 is arranged in the limiting slot 11, one end of the rotating shaft 14 is fixedly provided with a torsion spring 15, and the other end is fixedly provided with a connecting rod 5, the free end of the connecting rod 5 is fixedly provided with a mounting frame 18 after extending out of the limiting slot 11, the sealing cylinder 6 is connected with the telescopic frame 4 through the mounting frame 18, and a turnover frame 17 is further arranged on the connecting rod 5. The pushing box 2 on one side of the telescopic frame 4 is fixedly provided with a turnover block 13, the turnover block 13 and the turnover frame 17 are matched with each other, when the telescopic frame 4 is retracted into the pushing box 2, the turnover frame 17 will contact with the turnover block 13 and push the connecting rod 5 to rotate around the rotating shaft 14. The arrangement can ensure that the connecting rod 5 is always in the correct position after rotating, and ensure the normal work and operation of the equipment.

[0049] Referring to Figure 8 It is explained that the mounting frame 18 is provided with a limiting guide rod 19 penetrating through, one end of the limiting guide rod 19 is connected with a piston plate 21, and the other end is fixedly provided with a limiting plate 16. A test spring 20 is sleeved on the limiting guide rod 19, one end of the test spring 20 is connected with the mounting frame 18 through a spring seat, and the other end is connected with a pressure sensor 38 on the piston plate 21. The arrangement can limit the movement distance of the piston plate 21, and avoid the support frame 22 from sliding out of the sealing cylinder 6.

[0050] Specifically, the mounting body 9 is provided with a sealing gasket 30 on the surface opposite to the sealing cylinder 6, and a telescopic rod 31 is located inside the sealing gasket 30. The sealing gasket 30 is matched with the sealing cylinder 6. The arrangement can ensure the sealing property of the sealing cylinder 6 after contacting with the mounting body 9, and improve the accuracy of the detection result.

[0051] As Figure 3 shown, the support frame 22 is provided with an adjusting slot 23, and a fixed nut 29 is slidably arranged on the adjusting slot 23. The fixed plate 26 is slidably connected with the support frame 22 through the fixed nut 29 and the adjusting slot 23. The fixed plate 26 is provided with a plurality of lock buckles 28 and a plurality of fixed belts 27, and the positions of the plurality of lock buckles 28 and the plurality of fixed belts 27 are one-to-one corresponding. The arrangement can fix motors of different sizes.

[0052] Referring to Figure 4 and Figure 6 It is explained that the mounting body 9 is further provided with an oil nozzle 10 and an oil cavity 32. The oil nozzle 10 is in communication with the oil cavity 32. Two oil seals 34 are fixedly arranged in the oil cavity 32. The telescopic rod 31 penetrates through the inside of the two oil seals 34 and is in sliding sealing with the two oil seals 34. A pressing plate 33 is further sleeved on the telescopic rod 31. The pressing plate 33 is located outside the oil cavity 32 and is connected with the mounting body 9 through threads. The arrangement can lubricate the connection between the telescopic rod 31 and the oil seal 34, reduce the friction between the components, and prolong the service life.

[0053] As Figure 7As shown, the end of the coupling 24 and the telescopic rod 31 are fixedly provided with a ratchet disc 43, the structure of which is as shown in Figure 7 As shown, the coupling 24 and the telescopic rod 31 are connected through the ratchet disc 43, so that the quick connection and separation of the coupling 24 and the telescopic rod 31 can be realized.

[0054] The working process of the embodiment: in operation, the hydraulic cylinder 12 is controlled to be shortened through the control panel 3, and the telescopic frame 4 is inserted into the pushing box 2 by the shortened hydraulic cylinder 12. When the telescopic frame 4 drives the connecting rod 5 to move to the position where the turnover frame 17 on the connecting rod 5 contacts with the turnover block 13, the turnover frame 17 will be blocked by the turnover block 13. At this time, as the telescopic frame 4 continues to shrink into the pushing box 2, the turnover block 13 will push the turnover frame 17 to move, so that the turnover frame 17 drives the connecting rod 5 to rotate around the pivot 14. At the same time, the torsional spring 15 will be compressed when the connecting rod 5 drives the pivot 14 to rotate. When the hydraulic cylinder 12 drives the telescopic frame 4 to move to the limit position, the connecting rod 5 will drive the sealing cylinder 6 to rotate under the cooperation of the turnover block 13 and the turnover frame 17, as shown in Figure 2

[0055] At this time, one end of the sealing cylinder 6 will rotate to the outside. Then, the position of the fixed plate 26 needs to be adjusted according to the diameter of the motor to be tested. In the adjustment, the fixed nut 29 needs to be rotated, so that the fixed plate 26 can slide along the adjusting groove 23. Then, according to the scale line engraved on the adjusting groove 23, the distance between the fixed plate 26 and the axis of the coupling 24 is equal to the radius of the motor to be tested. In this way, it can be ensured that after the motor to be tested is installed on the fixed plate 26, the output shaft can be aligned with the coupling 24. Then, the output shaft of the motor to be tested is connected with the coupling 24. Then, the motor to be tested is fixed on the fixed plate 26 through the fixing belt 27 and the lock piece 28 on the fixed plate 26, and the power supply of the motor to be tested is connected.

[0056] When the motor to be tested is fixed on the fixed plate 26, the hydraulic cylinder 12 is controlled to be lengthened through the control panel 3. After the hydraulic cylinder 12 is lengthened, the telescopic frame 4 will be pushed out of the pushing box 2. When the telescopic frame 4 is extended out of the pushing box 2, the connecting rod 5 will be moved. As the telescopic frame 4 is gradually lengthened, the turnover frame 17 will be separated from the turnover block 13. Under the action of the torsional force of the torsional spring 15, the connecting rod 5 will rotate again until it stops rotating after being attached to the side wall of the limiting groove 11. At this time, the axis of the connecting rod 5 is the same as the moving direction of the telescopic frame 4. As the telescopic frame 4 moves, the sealing cylinder 6 will contact with the sealing gasket 30 on the mounting body 9, so as to seal the sealing cylinder 6.

[0057] ​Then the data of the pressure sensor 38 before the motor to be tested rotates is recorded, and then the motor to be tested is controlled to rotate by the control panel 3. When the motor to be tested rotates, the rotation speed sensor 25 connected with the shaft coupling 24 detects the rotation speed of the motor to be tested and sends the data to the control panel 3. After the motor to be tested rotates, the two interlocked ratchet plates 43 cooperate to drive the telescopic rod 31 to rotate through the shaft coupling 24. After the telescopic rod 31 rotates, the lead screw 36 rotates, and the lead screw 36 drives the telescopic rod 31 to move into the sealed cylinder 6 under the drive of the threaded sleeve 37. The piston plate 21 is pushed to move by the support frame 22, and the piston plate 21 moves to press the test spring 20 through the pressure sensor 38. At this time, the force applied to the push plate by the compression spring is the thrust of the piston plate 21 pushed by the lead screw 36. Combined with the parameters of the lead screw 36 and the thrust of the lead screw 36, the torque required when the lead screw 36 rotates can be calculated, and the calculation formula is as follows:

[0058]

[0059] Wherein: T is the torque of the lead screw 36, F is the thrust of the lead screw 36 (unit: N), that is, the pressure applied to the pressure sensor 38 by the test spring 20. In this embodiment, it is obtained by subtracting the data of the pressure sensor 38 before the motor to be tested rotates from the maximum value of the pressure sensor 38; L is the lead of the lead screw 36. In this embodiment, the lead refers to the distance that the piston plate 21 moves after the lead screw 36 rotates one circle.

[0060] Since the output shaft of the motor to be tested is connected with the lead screw 36, the torque of the lead screw 36 is the torque of the output shaft of the motor to be tested. The torque of the motor to be tested can be calculated, and the calculation formula is as follows:

[0061]

[0062] Wherein: P is the power, T is the torque, N is the rotation speed of the motor to be tested, and 9550 is the conversion coefficient.

[0063] When the converted power of the pressure applied to the pressure sensor 38 by the test spring 20 meets the maximum power of the motor to be tested, the power supply of the motor to be tested is cut off. Then the pressure sensor 38 sends the air pressure data in the sealed cylinder 6 to the control panel 3, and then keeps the sealed cylinder 6 in a negative pressure state for a process setting time. When the air pressure in the sealed cylinder 6 does not change or changes within the error range, it means that the air tightness of the motor housing meets the requirements, otherwise it does not meet the requirements.

[0064] It should be noted that, as the motor to be tested is connected to the support frame 22 through the fixing plate 26, and the support frame 22 is connected to the piston plate 21, when the motor to be tested rotates, the reverse force received by the motor to be tested will drive the piston plate 21 to rotate through the support frame 22, so the piston plate 21 is connected to the mounting frame 18 through the limiting rod, and in order to avoid the rotation of the piston plate 21, the limiting rod is a square tube, which can avoid the rotation of the piston plate 21 by cooperating with the square hole on the mounting frame 18, and the limiting plate 16 on the limiting rod can avoid the support frame 22 being pushed out of the sealed cylinder 6 by the test spring 20.

[0065] After the detection is completed, the control panel 3 controls the air pressure monitoring device to open, so that the gas outside the sealed cylinder 6 enters the sealed cylinder 6, and then the hydraulic cylinder 12 is controlled to be shortened, and the telescopic frame 4 is moved into the pushing box 2 again, in this process, the test spring 20 will gradually elongate, and the piston plate 21 will be pushed away from the mounting frame 18, until the limiting plate 16 at the end of the limiting rod contacts the mounting frame 18 to stop.

[0066] When the piston plate 21 stops moving, the ratchet disc 43 on the coupling 24 will be separated from the ratchet disc 43 on the telescopic rod 31, and when the turnover frame 17 on the connecting rod 5 contacts the turnover block 13, it will push the connecting rod 5 to drive the sealed cylinder 6 to rotate, which facilitates the removal of the motor to be tested on the fixing plate 26, and the telescopic rod 31 pushed out by the lead screw 36 will be retracted into the mounting body 9 by reverse rotation.

[0067] In this embodiment, an oil cavity 32 is also provided on the mounting body 9, two oil seals 34 are installed in the oil cavity 32, and the two oil seals 34 are located at both ends of the oil cavity 32. Lubricating oil is added to the oil cavity 32 through the oil nozzle 10, which can lubricate the telescopic rod 31 and reduce the friction between the telescopic rod 31 and the oil seal 34 when the telescopic rod 31 moves. Moreover, the oil seal 34 near the opening is fixed in the oil cavity 32 by the pressing plate 33, so that the oil seal 34 cannot be pulled out of the oil cavity 32 due to the negative pressure in the sealed cylinder 6.

[0068] Embodiment 2: as shown in Figures 8-12 Based on embodiment 1, the structure of the threaded sleeve 37 is improved, and the threaded sleeve 37 is composed of at least two components 371, as shown in Figure 10As shown, the threaded sleeve 37 in this embodiment is split into three parts for illustration, and the size of each part of the split threaded sleeve 37 needs to be the same, and each assembly 371 is provided with a lifting frame 39, the lifting frame 39 is provided with a driving slot 44, one side of the lifting frame 39 is provided with a push rod 46, one end of the push rod 46 is provided with a return spring 47, and the other end is opposite to the end of the sealing cylinder 6 after penetrating out of the mounting body 9, and the driving column 45 is also fixedly arranged on the push rod 46, the free end of the driving column 45 is located in the driving slot 44, and reciprocally slides along the driving slot 44, so that the assembly 371 of the threaded sleeve 37 can cooperate with the lead screw 36 after splicing, and provides a pushing force for the lead screw 36 when the lead screw 36 rotates, and the cooperation between the threaded sleeve 37 and the lead screw 36 disappears after separation, realizing the quick recovery of the telescopic rod 31.

[0069] Preferably, the lifting frame 39 is provided with a buffer hole 40, and the buffer hole 40 is provided with a buffer spring 42 and a connecting column 41, one end of the connecting column 41 is connected with the buffer spring 42, and the other end is connected with the corresponding assembly 371 after penetrating out of the buffer hole 40, so that the assembly 371 of the threaded sleeve 37 can be stably connected with the lead screw 36, and at the same time, the equipment damage caused by the movement distance exceeding the limit can be avoided, and the problem of the lead screw 36 losing force caused by the quick separation of the assembly 371 of the threaded sleeve 37 and the lead screw 36 when the sealing cylinder 6 and the mounting body 9 are separated can be avoided, and the problem of the test spring 20 pushing the piston plate 21 to quickly rebound can be avoided.

[0070] Preferably, the end of the sealing cylinder 6 opposite to the push rod 46 is fixedly provided with a ring plate 8, so that the contact area of the sealing cylinder 6 and the push rod 46 can be increased, and the stable transmission of power can be ensured.

[0071] The working process of the embodiment: by adding the structure in the embodiment, the ring plate 8 will contact the sealing gasket 30 after the sealing cylinder 6 approaches the mounting body 9, and the ring plate 8 will push the push rod 46 to move into the mounting body 9, the push rod 46 will compress the return spring 47 when moving, and at the same time, the lifting frame 39 will approach the lead screw under the cooperation of the driving column 45 and the driving groove 44, and finally the screw sleeve 37 will be spliced, and the assembly 371 of the screw sleeve 37 will stop moving when the threads on the screw sleeve 37 and the thread grooves on the lead screw 36 are not in position, at this time, the assembly 371 of the screw sleeve 37 cannot enter the thread grooves on the lead screw 36, and the telescopic frame 4 will continue to move downward, at this time, the assembly 371 of the screw sleeve 37 will push the connecting column 41 to move into the buffer hole 40 and compress the buffer spring 42, and since there is no cooperation between the threads and the screw sleeve 37 at this time, when the ratchet disc 43 on the shaft coupling 24 contacts the ratchet disc 43 on the telescopic rod 31, the telescopic rod 31 will be pushed to move into the mounting body 9, and the lead screw 36 will move when the telescopic rod 31 moves into the mounting body 9, and the threads on the assembly 371 of the screw sleeve 37 will enter the thread grooves on the lead screw 36, so that all the assemblies 371 of the screw sleeve 37 are spliced into a complete screw sleeve 37, and the screw sleeve 37 also completes the cooperation with the lead screw 36, and then the lead screw 36 will push the telescopic rod 31 to move out of the mounting body 9 after the detection motor rotates, and the lead screw 36 will stretch the tension spring when moving, and the lead screw 36 will complete the detection process of the process in embodiment 1 after moving.

[0072] The difference is that when the sealing cylinder 6 is separated from the mounting body 9 after the detection is completed, the sealing ring will lose the pushing force applied by the push rod 46, at this time, the return spring 47 will be stretched to push the push rod 46 to move in the opposite direction, and the lifting frame 39 will move upward under the cooperation of the driving column 45 and the driving groove 44, but at this time, the test spring 20 will still apply an axial pushing force to the telescopic rod 31 through the support frame 22, so the threads on the assembly 371 of the screw sleeve 37 will be stuck in the thread grooves on the lead screw 36, and the connecting column 41 will move out of the buffer hole 40 as the lifting frame 39 continuously moves upward, and the buffer spring 42 will be stretched again after resetting, and when the axial force applied to the telescopic rod 31 disappears, the friction between the thread grooves on the lead screw 36 and the threads on the assembly 371 of the screw sleeve will disappear, at this time, the buffer spring 42 will reset, and will pull the connecting column 41 to move into the buffer hole 40 when resetting, and the assembly 371 of the screw sleeve 37 will move along the radial direction of the lead screw 36, and the cooperation between the screw sleeve 37 and the lead screw 36 will disappear, at this time, the telescopic rod 31 can be directly pushed back into the mounting body 9, and the rapid resetting of the lead screw 36 and the telescopic rod 31 is realized.

[0073] The above has been described in detail one embodiment of the present application, but the content is only the preferred embodiment of the present application, cannot be considered for limiting the scope of the present application. Any equivalent changes and improvements made in the scope of the present application, should still belong to the scope of the present application.

Claims

1. A testing device for a torque motor comprising a base plate (1), characterized in that: The bottom plate (1) is provided with a push box (2) and a mounting body (9), the push box (2) is provided with a telescopic frame (4) and a control panel (3), the telescopic frame (4) is provided with a sealing cylinder (6), the sealing cylinder (6) is provided with a piston plate (21) inside, one side of the piston plate (21) is provided with a pressure sensor (38), the pressure sensor (38) is provided with a test spring (20), the test spring (20) is connected with the telescopic frame (4), the other side of the piston plate (21) is provided with a support frame (22), the support frame (22) is provided with a shaft coupling (24), a rotating speed sensor (25) and a fixed plate (26), the input end of the rotating speed sensor (25) is connected with the shaft coupling (24), the fixed plate (26) is located below the shaft coupling (24), the cylinder wall of the sealing cylinder (6) on one side of the support frame (22) is provided with a gas pressure monitoring device, the gas pressure monitoring device, the rotating speed sensor (25) and the pressure sensor (38) are electrically connected with the control panel (3), the side wall of the mounting body (9) is provided with a telescopic rod (31), the telescopic rod (31) is coaxial with the shaft coupling (24), one end of the telescopic rod (31) is connected with the shaft coupling (24), the other end is fixedly provided with a lead screw (36), the lead screw (36) is matched with a threaded sleeve (37), and the threaded sleeve (37) is matched with the lead screw (36); The telescopic frame (4) is provided with a limiting groove (11), the limiting groove (11) is rotatably provided with a rotating shaft (14), one end of the rotating shaft (14) is fixedly provided with a torsional spring (15), and the other end is fixedly provided with a connecting rod (5), the free end of the connecting rod (5) is fixedly provided with a mounting frame (18) after extending out of the limiting groove (11), the sealing cylinder (6) is connected with the telescopic frame (4) through the mounting frame (18), and a turnover frame (17) is also arranged on the connecting rod (5), the push box (2) on one side of the telescopic frame (4) is fixedly provided with a turnover block (13), the turnover block (13) is matched with the turnover frame (17), when the telescopic frame (4) is retracted into the push box (2), the turnover frame (17) will contact the turnover block (13) and drive the connecting rod (5) to rotate around the rotating shaft (14); The mounting body (9) is also provided with an oil nozzle (10) and an oil cavity (32), the oil nozzle (10) communicates with the oil cavity (32), two oil seals (34) are fixedly arranged in the oil cavity (32), the telescopic rod (31) passes through the inner sides of the two oil seals (34) and is in sliding sealing with the two oil seals (34), and a pressing plate (33) is also sleeved on the telescopic rod (31), the pressing plate (33) is located outside the oil cavity (32) and is connected with the mounting body (9) through threads; The threaded sleeve (37) is made up of at least two components (371), each of which is provided with a lifting frame (39) having a driving slot (44) formed therein, and a push rod (46) provided on one side of the lifting frame (39) and having a reset spring (47) fixed at one end thereof and extending out of the mounting body (9) to be opposite to the end of the sealing cylinder (6), and a driving column (45) fixed on the push rod (46) and having a free end located in the driving slot (44) and reciprocally sliding along the driving slot (44).

2. A testing device for a torque motor according to claim 1, characterized in that: The mounting rack (18) is provided with a limiting guide rod (19) extending therethrough, one end of the limiting guide rod (19) being connected with the piston plate (21) and the other end being fixed with a limiting plate (16), and the test spring (20) being sleeved on the limiting guide rod (19) and having one end connected with the mounting rack (18) through a spring seat and the other end connected with a pressure sensor (38) on the piston plate (21).

3. A testing device for a torque motor as claimed in claim 1, characterized in that: The mounting body (9) is provided with a sealing gasket (30) on the side opposite to the sealing cylinder (6), and the telescopic rod (31) is located inside the sealing gasket (30), and the sealing gasket (30) is matched with the sealing cylinder (6).

4. A testing device for a torque motor as claimed in claim 1, characterized in that: The supporting frame (22) is provided with an adjusting groove (23), and a fixed nut (29) is slidingly arranged in the adjusting groove (23), and the fixed plate (26) is slidingly connected with the supporting frame (22) through the fixed nut (29) and the adjusting groove (23), and the fixed plate (26) is provided with a plurality of lock buckles (28) and a plurality of fixed belts (27), and the positions of the plurality of lock buckles (28) and the plurality of fixed belts (27) are one-to-one corresponding.

5. A testing device for a torque motor as claimed in claim 1, characterized in that: The coupling (24) and the end of the telescopic rod (31) are fixedly provided with a ratchet disc (43), and the coupling (24) and the telescopic rod (31) are connected with each other through the ratchet disc (43).

6. A testing device for a torque motor as claimed in claim 1, characterized in that: The lifting frame (39) is provided with a buffer hole (40), and a buffer spring (42) and a connecting column (41) are arranged in the buffer hole (40), one end of the connecting column (41) being connected with the buffer spring (42) and the other end extending out of the buffer hole (40) to be connected with the corresponding component (371).

7. A testing device for a torque motor as defined in claim 1, characterized in that: The end of the sealing cylinder (6) opposite to the push rod (46) is fixedly provided with a ring plate (8).

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