CN208636032U - A kind of pair of towed new-energy automobile speed changer running-in testing apparatus - Google Patents
A kind of pair of towed new-energy automobile speed changer running-in testing apparatus Download PDFInfo
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- CN208636032U CN208636032U CN201820574574.3U CN201820574574U CN208636032U CN 208636032 U CN208636032 U CN 208636032U CN 201820574574 U CN201820574574 U CN 201820574574U CN 208636032 U CN208636032 U CN 208636032U
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- speed changer
- motor assembly
- motor
- frequency converter
- torque
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Abstract
The utility model provides a kind of pair of towed new-energy automobile speed changer running-in testing apparatus, including torque and speed sensors, left link, right connecting piece, left frequency converter, right frequency converter, charging power supply and console, in left speed changer-motor assembly and right speed changer-motor assembly is at the two sides for being linearly symmetrically disposed in the torque and speed sensors, and charging power supply and torque and speed sensors are separately connected by left link and right connecting piece, form energy circulation closed loop.Solve the problems, such as when new-energy automobile transmission assembly running-in test only to speed changer routine tests, the flank of tooth of gear one direction work can only be merged, also it solves the problems, such as run-in test stand of gearbox using the driving motor and the high cost of load motor bring of non-vehicle itself and deviates practical operation situation, and solves the problem of energy that cannot be generated to internal system during speed changer running-in test rationally and efficiently uses, wastes the energy.
Description
Technical field
The utility model relates to a kind of mechanical engineering, in particular to a kind of new-energy automobile speed changer running-in testing apparatus.
Background technique
Automobile industry is one of the key industries of China's economic development, and new-energy automobile is gradually to develop recent years
The new industry come, in short supply, the worsening of ecological environment of the energy make new-energy automobile become the certainty of development of automobile industry
Trend, it is receive more and more attention.
Wherein, speed changer is widely used in automotive field, for changing transmission ratio, carries the effect of transmitting power, becomes
The quality of fast device performance is directly related to the behavior in service of automobile.Principal assembly one of of the speed changer as car transmissions,
The quality of its performance has direct influence for the dynamic property of automobile, fuel economy, operational stability and safety, therefore becomes
Fast device plays a very important role for the overall performance promotion of automobile.
The new-energy automobile of early stage mostly uses greatly the motor of no speed changer structure to be directly connected to the scheme of main reducing gear, fixes
Speed ratio speed reducer only has a gear, so that New energy automobile motor is often in low efficiency region, has both wasted valuable battery energy
Amount reduces continual mileage again, also improves the requirement to traction electric machine.By many years it was verified that installing speed changer additional
Its comprehensive performance of new-energy automobile does not load the new-energy automobile of speed changer far superior to, and new-energy automobile speed changer has few shelves
The features such as position, self shifter, multi power source coupling, and can greatly improve entire new energy automobile service condition, improve vapour
Vehicle continual mileage and power performance, further improving energy efficiency reduce discharge, keep new-energy automobile more green, environmentally friendly.But it is new
Energy automobile can not directly use conventional transmissions, need to new-energy automobile research and development dedicated transmission, and the quality of speed changer
Most important for the performance of automobile, important component of the speed changer as new-energy automobile becomes in production in order to verify
Can fast device product meet the whole of technical specification and require, and need first to carry out speed changer running-in test and corresponding parameter detecting,
Therefore research and development measuring accuracy height, fast response time, digitlization, networking, automation and the speed changer running-in test of flexibility dress
Method is set and merged, is the prerequisite that new-energy automobile production transmissions are launched.
Since new-energy automobile needs to research and develop dedicated transmission, so being also required to new-energy automobile speed changer running-in test
Detection is studied, to also just need to research and develop new-energy automobile run-in test stand of gearbox.
Existing Transmission Test Bed and speed transmission test device technology are primarily present following several situations:
1. existing running-in testing apparatus is all asymmetrical, although also there is speed changer to add gearbox or reduction gearbox group
It closes, but is not what full symmetric formula was arranged, a speed changer can only once be merged, it is inefficient, and not can be carried out
Energy recycles, and leads to system energy consumption height；
2. generally required when carrying out speed changer adjustment disassembly speed changer-motor assembly structure, can only be to speed changer
On the one hand routine tests increases the inconvenience of operation, the practical work of another aspect operating condition of test/condition and running car
Condition/condition is compared very remote；
3. adjustment when can only once merge transmission gear one direction work the flank of tooth, merge another direction need into
Row reverses gear or motor reversal, and driving motor and load motor substitute actual start using the motor of non-vehicle itself
Machine/motor simulates actual condition, certain difference is so still had with actual engine/motor, and use non-vehicle
The driving motor and load motor of itself cause extra charge, improve cost.
Disclosed in 1992-09-23, the Chinese utility model of Publication No. 2116896U discloses a kind of automotive transmission mill
Testing stand is closed, using motor by the automotive transmission of the opposite installation of belt transmission driving two, adjustment load is by hydraulic
It pumps to realize, hydraulic pump exports high pressure oil and drives hydraulic motor, and hydraulic motor drives two opposite installations together with motor
Automotive transmission, realize Power Recovery utilize, adjustment load torque size depend on hydraulic system pressure, hydraulic system
Pressure adjusted by overflow valve, pressure gauge instruction merges different automotive transmissions and then passes through replacement connector sleeve and universal joint, together
When complete two automotive transmissions adjustment.Although it is to drive two opposite installations together with motor by hydraulic motor
Automotive transmission also carries out energy regenerating recycling, has the advantages that energy-saving and emission-reduction, but can only to speed changer routine tests,
Needing to dismantle speed changer-motor assembly structure and its load is realized by hydraulic pump, and energy regenerating is also by hydraulic
It realizes, belongs to mechanical close formula gearbox testrigs, the control of revolving speed is also limited, and hydraulic loading device structure
More complex, late maintenance cost is higher.Importantly, its driving not instead of straight line arrangement form transmit, using belt into
The transmitting of row L shape, power transmitting have biggish loss, and energy recovery efficiency is low, and therefore, the mechanical close formula gearbox testrigs are existing
It is gradually eliminated.In addition, the transmitting of L shape causes not to be that full symmetric formula is arranged, end and loading end is driven not to can be carried out mutually
Switching, can not achieve the two-way adjustment in transmission gear face.
Disclosed in 2009-11-11, the Chinese utility model of Publication No. 101576437A discloses a kind of automotive transmission
Run-in stand, run-in stand include transmission shaft and speed changer installation rack, and the transmission shaft is by left drive shaft and right transmission
Axis is formed by connecting through universal joint, and the right part of the right transmission shaft is equipped with spline, and the left end of the left drive shaft is placed through institute
It states and is set with spline housing in the left drive shaft after the connecting plate on rack.It is by transmission shaft, by speed changer on engine assembly
Rotation drive speed changer to carry out running-in test, when adjustment, only need first install speed changer to be merged, then spline housing with
The main shaft connection of speed changer can be merged, and adjustment efficiency greatly improves, and not need separately installed speed changer adjustment examination
Platform is tested, need to can only be merged in engine assembly monitor station, save hall space.Although it is examined in engine assembly
Scaffold tower carries out running-in test, but its engine and speed changer to be ground are separation, and the later period is just attached test, makes test process
Cannot be very close to practical operation situation, and this first separation reconnection leads to still have assembling and dissembling process, it is inconvenient.In addition, its
There is no loading device, unloaded adjustment can only be carried out, do not carry out loading running-in, make to merge it is not comprehensive enough, it is inefficient.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of pair of towed new-energy automobile speed changer running-in test
Device, needs to dismantle speed changer-motor assembly structure, can only be to change when solving new-energy automobile transmission assembly running-in test
Fast device routine tests, the flank of tooth that can only merge the work of gear one direction merge another direction and are reversed gear or electric
The problem of machine inverts also solves driving motor and load motor bring that run-in test stand of gearbox uses non-vehicle itself
The energy that cannot be generated to internal system during high cost and speed changer running-in test rationally and efficiently uses, unrestrained in vain
The problem of taking the energy.
The utility model is realized in this way: a kind of pair of towed new-energy automobile speed changer running-in testing apparatus, including turn
Fast torque sensor, left link, right connecting piece, left frequency converter, right frequency converter, charging power supply and console, it is described
Left link and right connecting piece are symmetrically disposed in the two sides of the torque and speed sensors；
The charging power supply connects the electricity in left speed changer-motor assembly to be merged by the left frequency converter
Machine, the speed changer and the rotational speed and torque that the both ends of the left link are separately connected in the left speed changer-motor assembly pass
Sensor；
The charging power supply connects the electricity in right speed changer-motor assembly to be merged by the right frequency converter
Machine, the speed changer and the rotational speed and torque that the both ends of the right connecting piece are separately connected in the right speed changer-motor assembly pass
Sensor；
And the left speed changer-motor assembly and the right speed changer-motor assembly are linearly arranged symmetrically；
The left frequency converter and the right frequency converter are all connected with the console.
Further, the utility model further includes two three phase connections, the left frequency converter and the right frequency converter difference
The charging power supply is connected by a three phase connection.
Further, the charging power supply includes rechargeable battery and line charger, and the rechargeable battery can cross this
Line charger connects utility grid, is also respectively connected with the left frequency converter and the right frequency converter.
Further, the utility model further includes big base platform, the left speed changer-motor assembly, the right speed change
Device-motor assembly and the fast torque sensor are each provided on the big base platform.
Further, the utility model further includes the sensor base being fixed on the big base platform, left support dress
Platform and right support clamping bench are pressed from both sides, the speed torque sensor is located in sensor base, the left speed changer-motor assembly, institute
Right speed changer-motor assembly is stated then to be respectively provided on the left support clamping bench and the right support clamping bench.
Further, the left support clamping bench includes left support seat, left slide unit and left folder platform, and the left support seat is solid
It is scheduled on the big base platform, the left slide unit is slidably installed in the left support seat, and the left folder platform is fixed on the left cunning
For clamping the left speed changer-motor assembly on platform；
The right support clamping bench includes right support seat, right slide unit and right folder platform, and the right support seat is fixed on described
On big base platform, the right slide unit is slidably installed on the right support seat, and the right folder platform, which is fixed on the right slide unit, to be used for
Clamp the right speed changer-motor assembly.
Further, the left link includes the left splined shaft and left spline housing for being mutually matched connection, and left splined shaft connects
Connect the motor in left speed changer-motor assembly, torque and speed sensors described in left spline housing；
The right connecting piece includes the right splined shaft and right spline housing for being mutually matched connection, the right right speed change of spline axis connection
Motor in device-motor assembly, torque and speed sensors described in right spline housing.
The utility model has the advantages that
1. directly carrying out running-in test to speed changer-motor assembly structure, the motor in speed changer-motor assembly structure is straight
It connects as driving motor and load motor to speed changer, since motor is motor used in new-energy automobile itself, energy
Enough make operating condition of test/condition closer to actual condition/condition of running car；
2. symmetrical can make the wherein positive flank of tooth adjustment of a speed changer progress, Ling Yitai to towed experimental rig
Speed changer then carries out reversed flank of tooth adjustment, when driving motor and load motor switch over, then it is corresponding can to carry out speed changer
Opposing face flank of tooth adjustment, the two-way adjustment of the flank of tooth is carried out to speed changer, so that the driving end speed changer flank of tooth and load end speed change
The device flank of tooth has equal chance to be merged comprehensively, and adjustment speed is fast, high-efficient, effect is good；
3. two speed changer-motor assemblies are symmetrical, when a conduct drives end, another is first as load end
Tail is mutually connected into closed loop, and driving end obtains electric energy from energy storage device (charging power supply), and load end gives energy storage dress to power generation is absorbed
It sets, forms recycling for energy, making most of energy consumption of whole system is to realize energy feedback in internal circulation, deposit
Storage recycles, and the consumption of electric energy and generation is allowed to carry out the fraction of palpus supplement loss on complementary system, and driving end and load end
The formula that is in line arrangement, electric energy loss is low, effectively improves the utilization rate of energy, and energy-saving effect is obvious.
Detailed description of the invention
The utility model is further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the structural schematic diagram of one preferred embodiment of the utility model experimental rig.
Specific embodiment
Refering to Figure 1, the description for the utility model is introduced with a preferred embodiment.
Preferred embodiment according to the present utility model: its disclose to towed new-energy automobile speed changer running-in testing apparatus
100, including torque and speed sensors 1, left link 2, right connecting piece 3, left frequency converter 4, right frequency converter 5, charging power supply 6
And console 7, the left link 2 and right connecting piece 3 are symmetrically disposed in the two sides of the torque and speed sensors 1；And institute
Stating left link 2 includes the left splined shaft 21 and left spline housing 22 for being mutually matched connection, and the right connecting piece 3 includes being mutually matched
The right splined shaft 31 and right spline housing 32 being coupled.
The charging power supply 6 is connected in left speed changer-motor assembly 200 to be merged by the left frequency converter 4
Motor 201, the both ends of the left link 2 are separately connected 202 He of speed changer in the left speed changer-motor assembly 200
The torque and speed sensors 1；Specifically left splined shaft 21 connects the motor 201, Zuo Hua in left speed changer-motor assembly 200
Key covers 22 torque and speed sensors 1；
The charging power supply 3 is connected in right speed changer-motor assembly 300 to be merged by the right frequency converter 5
Motor 301, the both ends of the right connecting piece 5 are separately connected 302 He of speed changer in the right speed changer-motor assembly 300
The torque and speed sensors 1；Specifically right splined shaft 31 connects the motor 301 in right speed changer-motor assembly 300, right flower
Key covers 32 torque and speed sensors 1.
And the left speed changer-motor assembly 200 neutralizes the right speed changer-motor assembly 300 and is linearly arranged symmetrically；
The left frequency converter 4 and the right frequency converter 5 are all connected with the console 7.The utility model further includes two three
Phase connector 8, the left frequency converter 4 and the right frequency converter 5 connect the charging electricity by a three phase connection 8 respectively
Source 6.
The charging power supply 6 includes rechargeable battery 61 and line charger 62, and the rechargeable battery 61 can the city Guo Gai
Electric charger 62 connects utility grid, is also respectively connected with the left frequency converter 4 and the right frequency converter 5.
The utility model further includes big base platform 91, left support clamping bench 92, right support clamping bench 93, sensor base
94.The speed torque sensor 1 is located in sensor base 94, the left speed changer-motor assembly 200, the right speed changer-
Motor assembly 300 is then respectively provided on the left support clamping bench 92 and the right support clamping bench 93.
The left support clamping bench 92 includes left support seat 921, left slide unit 922 and left folder platform 923, the left support seat
921 are fixed on the big base platform 91, and the left slide unit 922 is slidably installed in the left support seat 921, the left folder platform
933 are fixed on the left slide unit 922 for clamping the left speed changer-motor assembly 200；
The right support clamping bench 93 includes right support seat 931, right slide unit 932 and right folder platform 933, the right support seat
931 are fixed on the big base platform 91, and the right slide unit 932 is slidably installed on the right support seat 931, the right folder platform
933 are fixed on the right slide unit 932 for clamping the right speed changer-motor assembly 300.
The working principle and operating process of the utility model:
1, left speed changer-motor assembly 200 and right speed changer-motor assembly 300 pass through left support clamping bench 92, the right side respectively
Support clamping bench 93 fixes, and connecting screw structure by servo motor makes left slide unit 922 or right slide unit 932 carry out axial dimension
Accurate positioning, sensed by the splined shaft (left splined shaft 21 and right splined shaft 31) at speed changer output flange end and rotational speed and torque
Spline housing (left spline housing 22 and right spline housing 32) on device 1 carries out being located by connecting for axial direction can pass through after axial connection
Left frequency-variable controller 4 carries out the control of speed to driving motor (motor 201 in i.e. left speed changer-motor assembly 200), thus
The output speed of the speed changer 302 in right speed changer-motor assembly 300 is controlled, driving motor simulates new-energy automobile driving system
The operating condition for actual travel of uniting provides power for the speed changer 201 in left speed changer-motor assembly 200, passes through rotational speed and torque
1 measured speed of sensor and torque, and speed is transmitted to load end speed changer (i.e. speed changer 302), it is (i.e. right to load motor
Motor 301 in speed changer-motor assembly 300) direct torque is carried out, load end motor (motor 301) is realized to testing stand
The load of frame, load motor simulate damping or load state in actual travel, and motor 301 makees generator at this time, by generation
Electric energy is transmitted in the rechargeable battery 61 of charging power supply 6, and the electric energy that rechargeable battery 61 stores also makes for driving end motor
With to constitute the closed circulation of an energy.End is driven to obtain electric energy from charging power supply 6, load end absorbs energy
It generates electricity to charging power supply 6, forms recycling for energy, making most of energy consumption of whole system is recycled in internal,
The fraction electric energy that loss need to only be supplemented in system from utility grid, constitutes electric closure, realizes the anti-of built-in system energy
Feedback recycles, so that system is whole, low energy consumption, there is apparent energy-saving effect.
2, when being merged, two speed changers-motor assembly structure power and load each other to dragging can be carried out mutually
Switching, it is common to complete the period of adjustment, so the task of two speed changers of the same race while adjustment, efficiency may be implemented in a upper stage
It is high；And end is driven to have equal chance to be merged comprehensively with the load end speed changer flank of tooth in adjustment -- towed is arranged
Experimental rig speed changer can be made to carry out positive flank of tooth adjustment, another speed changer then carries out reversed flank of tooth adjustment, when
When driving motor and load motor switch over, then the flank of tooth adjustment of the corresponding opposing face of speed changer can be carried out, realizes speed change
Device carries out the effect of the two-way adjustment of the flank of tooth, so that the driving end speed changer flank of tooth has equal chance with the load end speed changer flank of tooth
It is merged comprehensively, adjustment is high-efficient, effect is good.
3, sequence of movement requirement: left speed changer-motor assembly 200 to be merged and right speed changer-motor assembly 300 are simultaneously
The left slide unit 922 of online and automated exchanged cutter → control the and right axial movement of slide unit 932 accurate positioning → pass through splined shaft 21, spline
Set 22, torque and speed sensors 1, splined shaft 31, spline housing 32 will drive end and load end to connect → pass through low/medium/height
The successively combination of revolving speed and low/medium/high load carry out running-in test → torque and speed sensors 1 and oil temperature sensor to revolving speed,
Torque, oil temperature are monitored → switch driving motor and load motor carries out the two-way adjustment of the flank of tooth → rotational speed and torque biography of speed changer
Sensor and oil temperature sensor are monitored revolving speed, torque, oil temperature → merge finish offline → to be merged two more renewed
Speed changer -- motor assembly while online → (step cycle as above carries out speed changer running-in test).
It is compared with Chinese utility model 2116896U, the utility model belongs to electric closure to towed run-in test stand of gearbox
Testing stand is loaded directly by symmetrical motor transmission assembly, the energy loss for avoiding intermediate power from transmitting.Electric closure
It is directly recycled using to electric energy, energy recovery efficiency is high, and structure is relatively easy.And the driving of this patent testing stand and
Loading end can mutually be switched, and driven or loaded each other, make to drive the end speed changer flank of tooth and the load end speed changer flank of tooth
There is equal chance to be merged comprehensively, realizes the two-way adjustment in transmission gear face, adjustment is high-efficient, effect is good.
It is compared with Chinese utility model 101576437A, the utility model can be realized towed run-in test stand of gearbox
Energy recycles.Driving motor makees motor when test, obtains electric energy from energy storage device；Load motor is then as power generation
Machine stores the electrical energy transportation of generation to energy storage device, then electric energy is released to driving motor and is used, to form energy
Recycling, cycling and reutilization.Most of energy consumption of whole system is in internal circulation, and system is small from external electrical network supplement loss
Portion of energy, system is whole, and low energy consumption, has apparent energy-saving effect, can effectively improve the utilization rate of energy.And
Motor and speed changer are that assembly attaches together, integral type, and when test no longer needs to be attached, and are come from effect and power transmission efficiency
The advantage of saying becomes apparent from.And motor and transmission assembly that the utility model is equipped with using new-energy automobile itself, test
Process is also closer to actual conditions, the characteristics of meeting new-energy automobile.
Although those familiar with the art answers the foregoing describe specific embodiment of the present utility model
Working as understanding, we are merely exemplary described specific embodiment, rather than for the limit to the scope of the utility model
Fixed, those skilled in the art modification and variation equivalent made by the spirit according to the utility model all should
Cover in the scope of the claimed protection of the utility model.
Claims (7)
1. a kind of pair of towed new-energy automobile speed changer running-in testing apparatus, it is characterised in that: including torque and speed sensors, a left side
Connecting piece, right connecting piece, left frequency converter, right frequency converter, charging power supply and console, the left link and right connection
Part is symmetrically disposed in the two sides of the torque and speed sensors；
The charging power supply connects the motor in left speed changer-motor assembly to be merged, institute by the left frequency converter
The both ends for stating left link are separately connected speed changer and the torque and speed sensors in the left speed changer-motor assembly；
The charging power supply connects the motor in right speed changer-motor assembly to be merged, institute by the right frequency converter
The both ends for stating right connecting piece are separately connected speed changer and the torque and speed sensors in the right speed changer-motor assembly；
And the left speed changer-motor assembly and the right speed changer-motor assembly are linearly arranged symmetrically；
The left frequency converter and the right frequency converter are all connected with the console.
2. a kind of pair of towed new-energy automobile speed changer running-in testing apparatus according to claim 1, it is characterised in that: also
Including two three phase connections, the left frequency converter passes through a three phase connection with the right frequency converter respectively and connects the charging
Power supply.
3. a kind of pair of towed new-energy automobile speed changer running-in testing apparatus according to claim 1 or 2, feature exist
In: the charging power supply includes rechargeable battery and line charger, and the rechargeable battery can cross line charger connection
Utility grid is also respectively connected with the left frequency converter and the right frequency converter.
4. a kind of pair of towed new-energy automobile speed changer running-in testing apparatus according to claim 1, it is characterised in that: also
Including big base platform, the left speed changer-motor assembly, the right speed changer-motor assembly and the fast torque sensor
It is each provided on the big base platform.
5. a kind of pair of towed new-energy automobile speed changer running-in testing apparatus according to claim 4, it is characterised in that: also
Including sensor base, left support clamping bench and the right support clamping bench being fixed on the big base platform, the speed torque
Sensor is located in sensor base, and the left speed changer-motor assembly, the right speed changer-motor assembly are then respectively provided at
On the left support clamping bench and the right support clamping bench.
6. a kind of pair of towed new-energy automobile speed changer running-in testing apparatus according to claim 5, it is characterised in that:
The left support clamping bench includes that left support seat, left slide unit and left folder platform, the left support seat are fixed on the outsole
On seat platform, the left slide unit is slidably installed in the left support seat, and the left folder platform is fixed on the left slide unit for clamping
Left speed changer-the motor assembly；
The right support clamping bench includes right support seat, right slide unit and right folder platform, and the right support seat is fixed on the outsole
On seat platform, the right slide unit is slidably installed on the right support seat, and the right folder platform is fixed on the right slide unit for clamping
Right speed changer-the motor assembly.
7. a kind of pair of towed new-energy automobile speed changer running-in testing apparatus according to claim 1, it is characterised in that:
The left link includes the left splined shaft and left spline housing for being mutually matched connection, the left speed changer-electricity of Zuo Huajian axis connection
Motor in machine assembly, torque and speed sensors described in left spline housing；
The right connecting piece includes the right splined shaft and right spline housing for being mutually matched connection, the right right speed changer-electricity of spline axis connection
Motor in machine assembly, torque and speed sensors described in right spline housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820574574.3U CN208636032U (en) | 2018-04-20 | 2018-04-20 | A kind of pair of towed new-energy automobile speed changer running-in testing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820574574.3U CN208636032U (en) | 2018-04-20 | 2018-04-20 | A kind of pair of towed new-energy automobile speed changer running-in testing apparatus |
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| Publication Number | Publication Date |
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| CN208636032U true CN208636032U (en) | 2019-03-22 |
Family
ID=65731699
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820574574.3U Expired - Fee Related CN208636032U (en) | 2018-04-20 | 2018-04-20 | A kind of pair of towed new-energy automobile speed changer running-in testing apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332968A (en) * | 2018-04-20 | 2018-07-27 | 福建工程学院 | It is a kind of to towed new-energy automobile speed changer running-in testing apparatus |
-
2018
- 2018-04-20 CN CN201820574574.3U patent/CN208636032U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332968A (en) * | 2018-04-20 | 2018-07-27 | 福建工程学院 | It is a kind of to towed new-energy automobile speed changer running-in testing apparatus |
| CN108332968B (en) * | 2018-04-20 | 2024-03-29 | 福建工程学院 | Running-in test device for transmission of opposite-dragging type new energy automobile |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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