Initial Torque Measuring Device for Vehicle Air - Conditioner Clutch

Abstract

Automobile air conditioner clutch initial torque measuring device, including a horizontal base plate, a reduction motor, a torque limiter, and a torque sensor. The reduction motor is fixed on the base plate and its output shaft is horizontally arranged. The output shaft of the reduction motor is coaxially connected to one end of the torque limiter, and the other end of the torque limiter is coaxially connected to one end of the torque sensor. This device replaces the traditional manual measurement method using a torque wrench, increases the measurement accuracy, and improves the work efficiency.

Description

Technical Field

[0001] The invention relates to a vehicle air-conditioning clutch initial torque measuring device. Background Art

[0002] The electromagnetic clutch of the car air conditioner is a power transmission device between the car engine and the air conditioner compressor, which provides power to the car air conditioner compressor to make the compressor work or stop. Due to the limitations of the car structure, the current fuel or gas car air conditioner compressor is designed to be driven by the car engine through the electromagnetic clutch. Therefore, for this type of car air conditioner, the electromagnetic clutch is one of the indispensable parts. The electromagnetic clutch is roughly divided into three parts, namely the coil assembly, the pulley assembly and the drive plate assembly. The electromagnetic clutch controls the separation and engagement of the pulley and the drive plate through the coil.

[0003] The driving torque of the electromagnetic clutch plate directly affects the performance of the air-conditioning clutch. In order to ensure the normal operation of the automotive air-conditioning system, manufacturers need to test and inspect the initial driving torque of each batch of clutch plates. The existing testing tools are completed manually by manually turning the clutch with a torque wrench and reading the maximum indication of the torque wrench to determine whether the torque of the batch of workpieces is qualified. Using a torque wrench to measure the initial torque has the disadvantages of high labor intensity, low precision, and low efficiency, and is not suitable for large-scale production measurement needs. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a vehicle air-conditioning clutch initial torque measuring device, which can replace manual measurement of the clutch initial torque efficiently and accurately.

[0005] In order to solve the above technical problems, the present invention provides an initial torque measuring device for a vehicle air-conditioning clutch, comprising a horizontal base plate, a reduction motor, a torque limiter, and a torque sensor. The reduction motor is fixed on the base plate and the output shaft is arranged horizontally. The output shaft of the reduction motor is coaxially connected to one end of the torque limiter, and the other end of the torque limiter is coaxially connected to one end of the torque sensor.

[0006] For the purpose of simple explanation, the vehicle air-conditioning clutch initial torque measuring device described in the present invention is referred to as the present device below.

[0007] The method of using the device is as follows: fix the vehicle air-conditioning clutch on the bottom plate of the device through the corresponding tooling to fix the clutch pulley, and then coaxially connect the clutch drive plate with the other end of the torque sensor of the device, start the reduction motor to gradually apply torque to the clutch drive plate, and the torque sensor records the torque size in real time. When the drive plate and the pulley slip, turn off the reduction motor, and record the maximum torque of the clutch before slipping through the torque sensor.

[0008] Advantages of this device: This device replaces the traditional manual measurement method using a torque wrench, increases measurement accuracy, and improves work efficiency. A torque limiter is provided on the motor drive shaft to protect the torque sensor from overload.

[0009] In order to achieve better use effect of this device, the preferred scheme is as follows:

[0010] Preferably, the torque limiter is connected to the torque sensor via a transmission shaft, a rotation angle limiting device is provided in the middle of the length direction of the transmission shaft, the rotation angle limiting device comprises a positioning plate, the positioning plate is vertically arranged and fixedly connected to the bottom plate at the lower side, the normal direction of the positioning plate is consistent with the axial direction of the transmission shaft, a first through hole is provided on the positioning plate that passes through it along the normal direction, a first bearing matching the first transmission shaft is provided in the first through hole, and the transmission shaft passes through the first bearing from the axial hole of the first bearing;

[0011] The first bearing is sleeved with a collar that can rotate with the transmission shaft at a position close to the positioning plate, and a stopper is provided on the circumferential outer side of the collar. The positioning plate is symmetrically provided with a proximity sensor and a limit block that match the stopper at two sides of the position corresponding to the path of the stopper rotating with the transmission shaft, and the distance between the proximity sensor and the stopper along the stopper rotation path is smaller than the distance between the limit block and the stopper along the stopper rotation path.

[0012] The proximity sensor signal output end is connected to the controller signal input end, the controller signal output end is connected to the reduction motor signal input end, the block approaches the proximity sensor, the proximity sensor transmits the proximity signal to the controller, and the controller controls the reduction motor to stop rotating.

[0013] The rotation angle limiting device can stop the output of the reduction motor immediately after the clutch rotates relatively through the proximity sensor, and can prevent excessive deflection through the limit block.

[0014] Preferably, the other end of the torque sensor is provided with a connecting shaft for connecting to the clutch driving plate, the axial direction of the connecting shaft is consistent with the axial direction of the output shaft of the reduction motor, a support plate is provided at the middle of the bottom plate corresponding to the axial direction of the connecting shaft, the normal direction of the support plate is consistent with the axial direction of the connecting shaft, a second through hole is provided on the support plate that passes through it along the normal direction, a second bearing matching the connecting shaft is provided in the second through hole, and the connecting shaft passes through the second bearing from the axial hole of the second bearing.

[0015] The support plate plays a supporting role on the shaft system parts in the device, making its operation more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the device.

[0017] Figure 2 It is the left view of the positioning plate of this device. DETAILED DESCRIPTION

[0018] See also Figure 1 The vehicle air-conditioning clutch initial torque measuring device comprises a horizontal base plate 1, a reduction motor 2 (the output power of the reduction motor 2 is controllable), a torque limiter 3, and a torque sensor 4. The reduction motor 2 is fixed on the base plate 1 and the output shaft is arranged horizontally. The output shaft of the reduction motor 2 is coaxially connected to one end of the torque limiter 3, and the other end of the torque limiter 3 is coaxially connected to one end of the torque sensor 4.

[0019] The torque limiter 3 is connected to the torque sensor 4 through a transmission shaft 6. A rotation angle limiting device 5 is provided in the middle of the length direction of the transmission shaft 6. The rotation angle limiting device 5 includes a positioning plate 51. The positioning plate 51 is vertically arranged and fixedly connected to the bottom plate 1 at the lower side. The normal direction of the positioning plate 51 is consistent with the axial direction of the transmission shaft 6. The positioning plate 51 is provided with a first through hole 52 that passes through it along the normal direction. A first bearing 53 matching the first transmission shaft is provided in the first through hole 52. The transmission shaft 6 passes through the first bearing 53 from the axial hole of the first bearing 53.

[0020] The first bearing 53 is sleeved with a collar 54 that can rotate with the transmission shaft 6 at a position close to the positioning plate 51, and a stopper 541 is provided on the circumferential outer side of the collar 54. The positioning plate 51 is symmetrically provided with a proximity sensor 55 and a limit block 56 (in this embodiment, the limit block 56 is a bolt screwed on the positioning plate 51) that match the stopper 541 at two sides corresponding to the path of the stopper 541 rotating with the transmission shaft 6. The distance between the proximity sensor 55 and the stopper 541 along the rotation path of the stopper 541 is smaller than the distance between the limit block 56 and the stopper 541 along the rotation path of the stopper 541.

[0021] The signal output end of the proximity sensor 55 is connected to the signal input end of the controller, and the signal output end of the controller is connected to the signal input end of the reduction motor 2. The block 541 approaches the proximity sensor 55, and the proximity sensor 55 transmits the proximity signal to the controller, and the controller controls the reduction motor 2 to stop rotating ( Figure 1 The controller and corresponding wiring are not shown).

[0022] The other end of the torque sensor 4 is provided with a connecting shaft 7 for connecting to the clutch driving plate. The axial direction of the connecting shaft 7 is consistent with the axial direction of the output shaft of the reduction motor 2. A support plate 8 is provided at the middle of the position of the bottom plate 1 corresponding to the axial direction of the connecting shaft. The normal direction of the support plate 8 is consistent with the axial direction of the connecting shaft 7. The support plate 8 is provided with a second through hole 81 that passes through it along the normal direction. A second bearing 82 matching the connecting shaft 7 is provided in the second through hole 81. The connecting shaft 7 passes through the second bearing 82 from the axial hole of the second bearing 82.

[0023] The method of using the device is as follows: fix the vehicle air-conditioning clutch on the base plate 1 of the device through the corresponding tooling to fix the clutch pulley, and then coaxially connect the clutch drive plate with the other end of the torque sensor 4 of the device, start the reduction motor 2 to gradually apply torque to the clutch drive plate, and the torque sensor 4 records the torque size in real time. When the drive plate and the pulley slip, turn off the reduction motor 2, and record the maximum torque of the clutch before slipping through the torque sensor 4.

[0024] Advantages of the device: The device replaces the traditional manual measurement method using a torque wrench, increases the measurement accuracy, and improves work efficiency. A torque limiter is provided on the motor drive shaft to protect the torque sensor 4 from overload.

[0025] The rotation angle limiting device 5 can stop the output of the reduction motor 2 immediately after the clutch rotates relatively through the proximity sensor 55, and can prevent excessive deflection through the limit block 56.

[0026] The support plate 8 supports the shaft system parts in the device, making its operation more stable.

Claims

1. Vehicle air conditioner clutch initial torque measuring device, Characterized in that: It includes a horizontal base plate, a reduction motor, a torque limiter, and a torque sensor. The reduction motor is fixed on the base plate and its output shaft is horizontally arranged. The output shaft of the reduction motor is coaxially connected to one end of the torque limiter, and the other end of the torque limiter is coaxially connected to one end of the torque sensor; A transmission shaft is connected between the torque limiter and the torque sensor. A rotation angle limiting device is provided in the middle of the length direction of the transmission shaft. The rotation angle limiting device includes a positioning plate. The positioning plate is vertically arranged and its lower side is fixedly connected to the base plate. The normal direction of the positioning plate is consistent with the axis direction of the transmission shaft. A first through hole penetrating it along the normal direction is provided on the positioning plate. A first bearing matching the first transmission path is provided in the first through hole. The transmission shaft passes through the first bearing from the shaft hole of the first bearing; A collar that can rotate with the transmission shaft is sleeved on the first bearing near the positioning plate. A stop block is provided on the circumferential outer side of the collar. Proximity sensors and limit blocks matching the stop block are symmetrically provided on both sides of the positioning plate corresponding to the rotation path of the stop block. The distance between the proximity sensor and the stop block along the rotation path of the stop block is less than the distance between the limit block and the stop block along the rotation path of the stop block; The signal output end of the proximity sensor is connected to the signal input end of the controller, and the signal output end of the controller is connected to the signal input end of the reduction motor. When the stop block approaches the proximity sensor, the proximity sensor transmits the proximity signal to the controller, and the controller controls the reduction motor to stop rotating; The other end of the torque sensor is provided with a connecting shaft for connecting with the clutch driving disc. The axis direction of the connecting shaft is the same as the axis direction of the output shaft of the reduction motor. A support plate is provided in the middle of the base plate corresponding to the axis direction of the connecting shaft. The normal direction of the support plate is the same as the axis direction of the connecting shaft. A second through hole penetrating it along the normal direction is provided on the support plate. A second bearing matching the connecting shaft is provided in the second through hole. The connecting shaft passes through the second bearing from the shaft hole of the second bearing.

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