Testing system for coaxial gearbox and coaxial decoupling transmission device

Abstract

The utility model belongs to the technical field of gearbox testing, and particularly relates to a testing system for a coaxial gearbox and a coaxial decoupling transmission device, and the testing system comprises a driving part, a transmission mechanism, a hollow shaft, an adapter shaft, and two load testing parts. The driving part drives the transmission mechanism to drive the hollow shaft to rotate, one end of the hollow shaft is in transmission connection with an output shaft of the tested gearbox, and one end of the adapter shaft is in transmission connection with the output shaft of the tested gearbox and penetrates through the hollow shaft; the two load testing parts are fixedly connected with the input shaft of the tested gear box and the other end of the adapter shaft respectively, and are used for detecting the transmission efficiency of the tested gear box; through mutual cooperation of the driving part, the load testing parts, the transmission mechanism, the hollow shaft and the adapter shaft, an output shaft of a tested gearbox is decoupled to the driving part in parallel, and power input is performed through the driving part, so that the two load testing parts test data of a motor end and a wheel end respectively, and testing of the coaxial gearbox is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of gear box testing, in particular to a testing system for a coaxial gear box and a coaxial decoupling transmission device. Background Art

[0002] For the coaxial gearbox of new energy vehicles, its characteristic is that the motor output shaft and the wheel shaft are located on the same axis, that is, the two axes are colinear, so that the equipment can maintain a high transmission efficiency and a relatively compact structural design during the transmission process.

[0003] When testing a coaxial gearbox, due to the particularity of the coaxial gearbox structure, the existing three-motor test bench cannot install and test the coaxial gearbox. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a coaxial decoupling transmission device, which decouples the output shaft of the side gearbox in parallel to the driving part through the mutual cooperation of the driving part, the load testing part, the transmission mechanism, the hollow shaft and the adapter shaft, and inputs power through the driving part, so that the two load testing parts respectively test the data of the motor end and the wheel end, thereby realizing the test of the coaxial gearbox.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A coaxial decoupling transmission device comprises a driving part, a transmission mechanism, a hollow shaft, a transfer shaft and two load testing parts;

[0007] The driving unit drives the transmission mechanism to drive the hollow shaft to rotate, one end of the hollow shaft is drivingly connected to the output shaft of the gear box to be tested, and one end of the adapter shaft is drivingly connected to the output shaft of the gear box to be tested and is inserted into the hollow shaft;

[0008] The two load test parts are respectively fixedly connected to the input shaft of the gear box under test and the other end of the adapter shaft to detect the transmission efficiency of the gear box under test.

[0009] Working principle: After the driving unit drives the hollow shaft to rotate through the transmission mechanism, the hollow shaft causes the output shaft of the gearbox under test to rotate, and the output shaft of the gearbox under test drives the adapter shaft to rotate, simulating the rotation of the wheel shaft, and the data of the wheel end can be obtained. The other end of the output shaft of the gearbox under test rotates and is transmitted through the gearbox under test, driving the input shaft of the gearbox under test to rotate, and transmitting the power to the corresponding load test unit, and the data of the motor end can be obtained. The data at both ends are obtained through the two load test units respectively, and the transmission efficiency of the gearbox under test is calculated.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] Through the mutual cooperation of the driving part, the load testing part, the transmission mechanism, the hollow shaft and the adapter shaft, the output shaft of the gearbox on the side is decoupled in parallel to the driving part, and power is input through the driving part, so that the two load testing parts test the data of the motor end and the wheel end respectively, thereby realizing the test of the coaxial gearbox.

[0012] As a preferred embodiment of the present utility model, the transmission mechanism includes a transmission shaft, the driving part drives the transmission shaft to rotate, and the transmission shaft and the hollow shaft are driven by a belt.

[0013] Beneficial effects: Through belt transmission, it runs smoothly, has less vibration, and has overload protection function.

[0014] As a preferred embodiment of the present utility model, the transmission mechanism includes a transmission shaft, the driving part drives the transmission shaft to rotate, and the transmission shaft and the hollow shaft are driven by gears.

[0015] Beneficial effect: Through gear transmission, the transmission accuracy is higher and the structure is more compact.

[0016] As a preferred embodiment of the present utility model, the driving unit and the load testing unit both adopt an electric dynamometer.

[0017] Beneficial effect: The electric dynamometer can be used as an output terminal to test the output power, and can also be used as an input terminal to test the driving power of the machine.

[0018] As a preferred embodiment of the utility model, it also includes a box body, both sides of the front end of the box body are provided with concentric first through holes, the adapter shaft and the hollow shaft are respectively rotatably installed in the corresponding first through holes, and a second through hole is opened on one side of the rear end of the box body, and the transmission shaft is rotatably installed in the second through hole.

[0019] Beneficial effect: By setting up a box, the transmission mechanism is wrapped and protected to prevent dust from entering and reduce noise.

[0020] As a preferred embodiment of the utility model, the transmission shaft is respectively installed with first bearings on both sides of the box body, the hollow shaft is respectively installed with second bearings on both sides of the box body, and the adapter shaft is installed with two third bearings in the corresponding through holes.

[0021] Beneficial effect: By providing the first bearing, the second bearing and the third bearing, the friction and wear of the transmission shaft, the hollow shaft and the adapter shaft are reduced.

[0022] An embodiment of the utility model further provides a testing system for a coaxial gearbox, comprising the coaxial decoupling transmission device described above, and also comprising a monitoring unit, wherein the monitoring unit comprises a speed torque sensor, and the speed torque sensor tests the speed and torque of the hollow shaft.

[0023] Beneficial effect: When using belt transmission, power may be lost. By testing the speed and torque of the hollow shaft, the actual input to the gearbox under test can be detected.

[0024] As a preferred embodiment of the present utility model, the monitoring unit further includes a temperature sensor and a vibration sensor, and the temperature sensor and the vibration sensor are both installed on a box supporting the transmission mechanism.

[0025] Beneficial effect: By setting up temperature sensors and vibration sensors, the real-time temperature and vibration frequency of the system are monitored. When the values ​​exceed the preset values, emergency shutdown is performed to avoid damage to the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 The utility model is a schematic structural diagram of a test system embodiment for a coaxial gearbox.

[0027] The reference numerals include: driving unit 1, transmission mechanism 2, transmission shaft 21, belt 22, hollow shaft 3, adapter shaft 4, load testing unit 5, tested gearbox 6, first bearing 7, second bearing 8, third bearing 9, vibration sensor 10, speed torque sensor 11, temperature sensor 12. DETAILED DESCRIPTION

[0028] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0029] In the description of the present application, the terms "first", "second", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] See also Figure 1 , this embodiment discloses a coaxial decoupling transmission device, including a driving part 1, a transmission mechanism 2, a hollow shaft 3, a transfer shaft 4 and two load testing parts 5;

[0031] The driving part 1 drives the transmission mechanism 2 to drive the hollow shaft 3 to rotate, one end of the hollow shaft 3 is drivingly connected to the output shaft of the gear box 6 to be tested, and one end of the adapter shaft 4 is drivingly connected to the output shaft of the gear box 6 to be tested, and is inserted into the hollow shaft 3;

[0032] The two load testing parts 5 are respectively fixedly connected to the input shaft of the gearbox 6 under test and the other end of the adapter shaft 4 to detect the transmission efficiency of the gearbox 6 under test.

[0033] Through the mutual cooperation of the driving part 1, the load testing part 5, the transmission mechanism 2, the hollow shaft 3 and the adapter shaft 4, the output shaft of the side gearbox is decoupled in parallel to the driving part 1, and power is input through the driving part 1, so that the two load testing parts 5 test the data of the motor end and the wheel end respectively, thereby realizing the test of the coaxial gearbox.

[0034] The transmission mechanism 2 includes a transmission shaft 21 , and the driving unit 1 drives the transmission shaft 21 to rotate. The transmission shaft 21 and the hollow shaft 3 are driven by a belt 22 .

[0035] In other embodiments, the transmission shaft 21 and the hollow shaft 3 may be driven by gears or sprockets.

[0036] The driving unit 1 and the load testing unit 5 both adopt electric dynamometers, the driving unit 1 is an input dynamometer, and the load testing unit 5 is an output dynamometer.

[0037] In other embodiments, the driving unit 1 may be driven by a motor, and the load testing unit 5 may be driven by a torque tester.

[0038] It also includes a box body, and both sides of the front end of the box body are provided with concentric first through holes, and the adapter shaft 4 and the hollow shaft 3 are rotatably installed in the corresponding first through holes respectively, and a second through hole is opened on one side of the rear end of the box body, and the transmission shaft 21 is rotatably installed in the second through hole; by setting up the box body, the transmission mechanism 2 is wrapped and protected to prevent dust from entering and reduce noise.

[0039] Among them, the transmission shaft 21 is respectively installed with first bearings 7 on both sides of the box body, the hollow shaft 3 is respectively installed with second bearings 8 on both sides of the box body, and the adapter shaft 4 is installed with two third bearings 9 in the corresponding through holes; by arranging the first bearing 7, the second bearing 8 and the third bearing 9, the friction and wear of the transmission shaft 21, the hollow shaft 3 and the adapter shaft 4 are reduced.

[0040] The working principle and usage of this embodiment are as follows:

[0041] The driving unit 1 drives the transmission shaft 21 to rotate, and the transmission shaft 21 is transmitted through the belt 22, so that the hollow shaft 3 rotates, and the hollow shaft 3 drives the output shaft of the gearbox 6 under test to rotate, and the output shaft of the gearbox 6 under test drives the adapter shaft 4 to rotate, simulating the rotation of the wheel shaft, and the data of the wheel end can be obtained. The other end of the output shaft of the gearbox 6 under test rotates and is transmitted through the gearbox 6 under test, driving the input shaft of the gearbox 6 under test to rotate, and transmitting the power to the corresponding load test unit 5, and the data of the motor end can be obtained. The data at both ends are obtained respectively through the two load test units 5, and the transmission efficiency of the gearbox 6 under test is calculated.

[0042] The embodiment of the utility model further provides a testing system for a coaxial gearbox, comprising the coaxial decoupling transmission device described above, and also comprising a monitoring unit, wherein the monitoring unit comprises a speed torque sensor 11, and the speed torque sensor 11 tests the speed and torque of the hollow shaft 3.

[0043] Among them, the monitoring unit also includes a temperature sensor 12 and a vibration sensor 10, and the temperature sensor 12 and the vibration sensor 10 are both installed on the box supporting the transmission mechanism 2; by setting the temperature sensor 12 and the vibration sensor 10, the real-time temperature and vibration frequency of the monitoring system are monitored. When the value exceeds the preset value, the emergency shutdown is performed to avoid damage to the device.

[0044] It also includes a lubrication unit, which is used to inject oil through pipelines to lubricate the gear box 6 and the transmission mechanism 2 under test.

[0045] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A coaxial decoupling transmission device, characterized in that: It includes a driving part, a transmission mechanism, a hollow shaft, a transfer shaft and two load testing parts; The driving unit drives the transmission mechanism to drive the hollow shaft to rotate, one end of the hollow shaft is drivingly connected to the output shaft of the gear box to be tested, and one end of the adapter shaft is drivingly connected to the output shaft of the gear box to be tested and is inserted into the hollow shaft; The two load test parts are respectively fixedly connected to the input shaft of the gear box under test and the other end of the adapter shaft to detect the transmission efficiency of the gear box under test.

2. The coaxial decoupling transmission device according to claim 1, characterized in that: The transmission mechanism comprises a transmission shaft, the driving part drives the transmission shaft to rotate, and the transmission shaft and the hollow shaft are driven by a belt.

3. The coaxial decoupling transmission device according to claim 1, characterized in that: The transmission mechanism comprises a transmission shaft, the driving part drives the transmission shaft to rotate, and the transmission shaft and the hollow shaft are driven by gears.

4. The coaxial decoupling transmission device according to claim 1, characterized in that: The driving part and the load testing part both adopt electric dynamometers.

5. The coaxial decoupling transmission device according to claim 2 or 3, characterized in that: It also includes a box body, both sides of the front end of the box body are provided with concentric first through holes, the adapter shaft and the hollow shaft are rotatably installed in the corresponding first through holes respectively, and a second through hole is opened on one side of the rear end of the box body, and the transmission shaft is rotatably installed in the second through hole.

6. The coaxial decoupling transmission device according to claim 5, characterized in that: The transmission shaft is respectively installed with first bearings on both sides of the box body, the hollow shaft is respectively installed with second bearings on both sides of the box body, and the adapter shaft is installed with two third bearings in the corresponding through holes.

7. A test system for a coaxial gearbox, characterized in that: comprising a coaxial decoupling transmission according to claim 1, The device also includes a monitoring unit, which includes a rotation speed and torque sensor. The rotation speed and torque sensor tests the rotation speed and torque of the hollow shaft.

8. The testing system for a coaxial gearbox according to claim 7, characterized in that: The monitoring unit further comprises a temperature sensor and a vibration sensor, and both the temperature sensor and the vibration sensor are mounted on a box supporting the transmission mechanism.

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