Three-gear gearbox test bench and system applied to new energy commercial vehicle
By designing a three-speed gearbox test bench and using simulated fork components to simulate reaction force, the multi-speed gearbox testing problem of new energy commercial vehicles in the existing technology was solved, achieving a more realistic and accurate test effect.
Patent Information
- Application Number
- CN202411307742.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2024-12-31
AI Technical Summary
The existing technology lacks a test plan for multi-speed gearboxes for new energy commercial vehicles, resulting in a different test environment from the real situation, and it is impossible to effectively verify the transmission shift process control logic.
A three-speed transmission test bench including a bench base, a simulation fork assembly, a test controller, a first shift motor and a second shift motor were designed, and the commands were sent through the test controller and the motor angle was obtained. The simulation fork assembly simulates reaction forces, providing hardware basics and authenticity testing.
It improves the authenticity and accuracy of the three-speed transmission test of new energy vehicles, can effectively verify the gear shift process control logic, and meets the power and economic needs of commercial vehicles.
Smart Images
Figure CN119223617A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of simulation testing of new energy vehicles, and in particular to a three-speed gearbox test bench and system for new energy commercial vehicles. Background Art
[0002] With the rapid development of electric vehicle technology, new energy commercial vehicles have become the development trend of future commercial vehicles. In addition, since commercial vehicles have heavy loads and require stronger power, single-speed pure electric transmissions cannot meet the power and economic requirements of the vehicle. Therefore, it has become an inevitable trend to use multi-speed pure electric transmissions for new energy commercial vehicles.
[0003] Usually, during the manufacturing process of a vehicle, simulation tests are required on related components to verify whether there are design defects or failures.
[0004] In the prior art, there is a lack of testing solutions for multi-speed transmissions of new energy commercial vehicles.
[0005] This results in the test environment being different from the actual situation, which is not conducive to verifying the control logic of the gearbox shifting process. Summary of the invention
[0006] This specification provides a three-speed gearbox test bench and system for new energy commercial vehicles to at least partially solve the above-mentioned problems existing in the prior art.
[0007] This manual adopts the following technical solutions:
[0008] This specification provides a three-speed gearbox test bench for new energy commercial vehicles, including a bench base, a simulation fork assembly, a test controller, a first shift motor and a second shift motor;
[0009] The test controller is connected to the first shift motor and the second shift motor respectively, and can send a first shift instruction and a second shift instruction to the first shift motor and the second shift motor respectively based on the current gear position and the target gear position, and can also obtain a first shift angle output by the first shift motor and a second shift angle output by the second shift motor;
[0010] The first shift motor and the second shift motor each include a motor body, an output gear and an angle sensor; the motor body can drive the output gear to rotate according to the first shift instruction or the second shift instruction, and the angle sensor can obtain the first shift angle or the second shift angle of the output gear and send it to the test controller;
[0011] The simulated fork assembly includes a spring, a limit block, a movable rack and a fixed rod; the movable rack is sleeved on the outside of the fixed rod and meshes with the output gear, and can be driven by the output gear in the rotating process to move along the direction of the fixed rod; the movable rack is abutted against the spring sleeved on the outside of the fixed rod, and the other end of the spring is abutted against the limit block.
[0012] Preferably, the three-speed gearbox test bench applied to new energy commercial vehicles further includes a host computer;
[0013] The host computer is connected to the test controller and can send the target gear position to the test controller; and can also obtain the first gear shift angle and the second gear shift angle.
[0014] Preferably, the host computer can determine the test result according to the target gear position, the first shift angle and the second shift angle.
[0015] Preferably, the test controller can update the current gear position according to the first gear shift angle and the second gear shift angle; and can also redetermine the first gear shift instruction and the second gear shift instruction according to the target gear position and the updated current gear position.
[0016] Preferably, the three-speed gearbox test bench of the new energy commercial vehicle is configured with two simulated shift fork assemblies, and the two simulated shift fork assemblies correspond to the first shift motor and the second shift motor respectively.
[0017] Preferably, the limit block is provided with a clamping structure, and can be fixedly connected to the fixing rod through the clamping structure;
[0018] The limit block can move along the extension direction of the fixing rod, and the distances between the limit block moved to different positions and the output gear are different, so that the compression states of the spring arranged between the limit block and the output gear are different.
[0019] Preferably, the fixed positions of the limit blocks of the two simulated fork assemblies and / or the basic parameters of the springs and / or the initial compression states of the springs are different;
[0020] The basic parameters of the spring include spring length and elastic coefficient.
[0021] Preferably, the first shift motor corresponds to the switching between the first gear and the second gear;
[0022] The second shift motor corresponds to the switching of three gears;
[0023] In the simulated shift fork assembly corresponding to the first shift motor, both ends of the movable rack abut against the springs sleeved on the outer side of the fixed rack, and the other ends of the two springs abut against the limit blocks;
[0024] In the simulated shift fork assembly corresponding to the second shift motor, only one end of the movable rack abuts against the spring sleeved on the outer side of the fixed rack, and the other end of the spring abuts against the limit block.
[0025] Preferably, the motor body is provided with a signal input terminal and a signal output terminal;
[0026] The signal input terminal is connected to the motor body;
[0027] The signal output end is connected to the angle sensor.
[0028] On the other hand, the present specification also provides a three-speed gearbox test system for new energy commercial vehicles, the system comprising the three-speed gearbox test bench for new energy commercial vehicles proposed in the above aspect.
[0029] At least one of the above technical solutions adopted in this specification can achieve the following beneficial effects:
[0030] In the three-speed gearbox test bench provided in this specification, the test controller is connected to the first shift motor and the second shift motor respectively, and can send the first shift instruction and the second shift instruction to the first shift motor and the second shift motor respectively based on the current gear position and the target gear position, and can also obtain the first shift angle output by the first shift motor and the second shift angle output by the second shift motor. The first shift motor and the second shift motor both include a motor body, an output gear and an angle sensor; the motor body can drive the output gear to rotate according to the first shift instruction or the second shift instruction, and the angle sensor can obtain the first shift angle or the second shift angle of the output gear and send it to the test controller. The simulated fork assembly includes an interacting spring, a limit block, a movable rack and a fixed rod. The movable rack is sleeved on the outside of the fixed rod and meshes with the output gear. It can be driven by the output gear in the rotating process and move along the direction of the fixed rod; the movable rack is against the spring sleeved on the outside of the fixed rod, and the other end of the spring is against the limit block.
[0031] From the above content, it can be seen that the test bench can provide a hardware basis for the testing of the three-speed gearbox of new energy vehicles, and the simulated fork assembly can simulate the reaction force during the gear shifting process to improve the authenticity of the test. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] The drawings described herein are used to provide a further understanding of this specification and constitute a part of this specification. The illustrative embodiments and descriptions of this specification are used to explain this specification and do not constitute an improper limitation on this specification. In the drawings:
[0033] Figure 1 A schematic diagram of the structure of a three-speed gearbox test bench for new energy commercial vehicles provided in one embodiment of this specification;
[0034] Figure 2 A partial structural schematic diagram of a three-speed gearbox test bench for new energy commercial vehicles provided in one embodiment of this specification;
[0035] Figure 3 A schematic diagram of the architecture of a three-speed gearbox test bench for new energy commercial vehicles provided in accordance with one embodiment of the present specification.
[0036] Description of reference numerals:
[0037] Bench base 1; simulation fork assembly 2; test controller 3; first gear shift motor 4; second gear shift motor 5; signal input terminal 41; signal output terminal 42; host computer 6; output gear 43; movable rack 21; spring 22; limit block 23; fixing rod 24. DETAILED DESCRIPTION
[0038] In order to make the purpose, technical solutions and advantages of this specification more clear, the technical solutions of this specification will be clearly and completely described below in combination with the specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0039] In the description of the present invention, it should be noted that the term "or" is generally used in a meaning including "and / or", unless the content clearly indicates otherwise.
[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.
[0041] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0042] The technical solutions provided by the embodiments of this specification are described in detail below in conjunction with the accompanying drawings.
[0043] Figure 1 A schematic diagram of a three-speed gearbox test bench for a new energy commercial vehicle provided in one embodiment of this specification is shown in FIG. Figure 1 As shown, the three-speed gearbox test bench includes a bench base 1, a simulation fork assembly 2, a test controller 3, a first shift motor 4 and a second shift motor 5.
[0044] Preferably, the test controller 3 is connected to the first gear-shifting motor 4 and the second gear-shifting motor 5 respectively.
[0045] Preferably, the connection is an electrical connection.
[0046] Preferably, the first gear-shifting motor 4 and the second gear-shifting motor 5 are both equipped with a signal input terminal 41 and a signal output terminal 42 .
[0047] Preferably, the test controller 3 is connected to the signal input terminal 41 and the signal output terminal 42 of the first shift motor 4, and the test controller 3 is connected to the signal input terminal 41 and the signal output terminal 42 of the second shift motor 5. Figure 1 As shown, the test controller 3 is connected to the signal output terminal 42 and the signal input terminal 41 at the same time.
[0048] Preferably, the test controller 3 can send a first gear shift instruction and a second gear shift instruction to the first gear shift motor 4 and the second gear shift motor 5 respectively based on the current gear position and the target gear position.
[0049] Preferably, the test controller 3 can also obtain the first shift angle output by the first shift motor 4 and the second shift angle output by the second shift motor 5 .
[0050] Preferably, the first gear-shifting motor 4 and the second gear-shifting motor 5 both include a motor body, an output gear 43 and an angle sensor.
[0051] Preferably, the motor body is provided with a rotating shaft, which can be driven to rotate when started.
[0052] Preferably, the output gear 43 is fixedly connected to the rotating shaft, and can rotate around the rotating shaft driven by the rotating shaft.
[0053] Preferably, the angle sensor is fixed to the surface of the output gear 43 and can determine the angle of the output gear 43 .
[0054] Preferably, the motor body can drive the output gear 43 to rotate according to the first shift instruction or the second shift instruction. It should be noted that there are two motor bodies. Among them, the motor body of the first shift motor 4 can drive the output gear 43 to rotate according to the first shift instruction. The motor body of the second shift motor 5 can drive the output gear 43 to rotate according to the second shift instruction.
[0055] Preferably, the angle sensor can obtain the first gear shift angle or the second gear shift angle, and send the first gear shift angle or the second gear shift angle to the test controller 3 .
[0056] Preferably, the angle sensor of the first gear shift motor 4 is capable of determining and sending the first gear shift angle to the test controller 3 .
[0057] Preferably, the angle sensor of the second gear shift motor 5 can determine and send the second gear shift angle to the test controller 3 .
[0058] Preferably, the simulated fork assembly 2 includes a spring 22 , a limit block 23 , a movable rack 21 and a fixing rod 24 .
[0059] Preferably, the movable rack 21 is sleeved on the outside of the fixed rod 24 and meshes with the output gear 43 , and can be driven by the output gear 43 in the rotating process to move along the direction of the fixed rod 24 .
[0060] Preferably, the movable rack 21 abuts against a spring 22 sleeved on the outer side of the fixed rack, and the other end of the spring 22 abuts against a limit block 23 .
[0061] Figure 2 A partial structural diagram of a three-speed gearbox test bench for new energy commercial vehicles provided in one embodiment of this specification is shown in FIG. Figure 2 As shown, the movable rack 21, the spring 22, and the limit block 23 are all sleeved on the outside of the fixed rod 24, and one end of the two springs 22 abuts against the movable rack 21, and the other end abuts against the limit block 23, and the movable rack 21 and the output gear 43 are meshed with each other.
[0062] In the three-speed gearbox test bench provided in this specification, the test controller 3 is connected to the first shift motor 4 and the second shift motor 5 respectively, and can send the first shift instruction and the second shift instruction to the first shift motor 4 and the second shift motor 5 respectively based on the current gear position and the target gear position, and can also obtain the first shift angle output by the first shift motor 4 and the second shift angle output by the second shift motor 5. The first shift motor 4 and the second shift motor 5 both include a motor body, an output gear 43 and an angle sensor; the motor body can drive the output gear 43 to rotate according to the first shift instruction or the second shift instruction, and the angle sensor can obtain the first shift angle or the second shift angle of the output gear 43 and send it to the test controller 3. The simulated fork assembly 2 includes an interacting spring 22, a limit block 23, a movable rack 21 and a fixed rod 24. The movable rack 21 is sleeved on the outside of the fixed rod 24 and meshes with the output gear 43. It can be driven by the output gear 43 in the rotating process and move along the direction of the fixed rod 24; the movable rack 21 is against the spring 22 sleeved on the outside of the fixed rod, and the other end of the spring 22 is against the limit block 23.
[0063] It can be seen from the above content that the test bench can provide a hardware basis for the test of the three-speed gearbox of new energy vehicles, and the simulation fork assembly 2 can simulate the reaction force during the gear shifting process to improve the authenticity of the test.
[0064] Preferably, the three-speed gearbox test bench applied to new energy commercial vehicles also includes a host computer 6.
[0065] Preferably, the host computer 6 is communicatively connected with the test controller 3 .
[0066] Preferably, the host computer 6 can send the target gear position to the test controller 3 .
[0067] Preferably, the test controller 3 can send the first shift angle and the second shift angle to the host computer 6 .
[0068] Preferably, the host computer 6 can also obtain the first shift angle and the second shift angle.
[0069] Preferably, the host computer 6 can be connected to the first gear shift motor 4 and the second gear shift motor 5 to directly obtain the first gear shift angle and the second gear shift angle.
[0070] Preferably, the host computer 6 can determine the test result according to the target gear position, the first gear shift angle and the second gear shift angle.
[0071] Preferably, the data forms of the first shift angle and the second shift angle are both output voltages, and the magnitude of the output voltages corresponds to different gear positions.
[0072] Preferably, when the first shift angle is 0.4V and the second shift angle is 1.3-3V, the corresponding gear is 2nd gear. When the first shift angle is 4.6V and the second shift angle is 1.3-3V, the corresponding gear is 1st gear. When the first shift angle is 1.3-3V and the second shift angle is 4.6V, the gearbox is 3rd gear.
[0073] Figure 3 A schematic diagram of the architecture of a three-speed gearbox test bench for new energy commercial vehicles provided in one embodiment of this specification is shown in FIG. Figure 3 As shown, the host computer 6 sends the target gear to the test controller 3; the test controller 3 sends the first gear shift instruction to the first gear shift motor 4, and sends the second gear shift instruction to the second gear shift motor 5; the first gear shift motor 4 sends the first gear shift angle to the host computer 6 and the test controller 3 respectively; the second gear shift motor 5 sends the second gear shift angle to the host computer 6 and the test controller 3 respectively.
[0074] Preferably, simulation test software is running in the host computer 6 .
[0075] Preferably, the host computer 6 can determine the test result based on the simulation test software according to the first shift angle and the second shift angle.
[0076] Preferably, the test controller 3 can update the current gear position according to the first gear shift angle and the second gear shift angle.
[0077] Preferably, the test controller 3 can also redetermine the first gear shift instruction and the second gear shift instruction according to the target gear and the updated current gear, so as to complete the current gear adjustment and continue the test.
[0078] Preferably, the three-speed gearbox test bench of the new energy commercial vehicle is equipped with two simulated fork assemblies 2, and the two simulated fork assemblies 2 correspond to the first shift motor 4 and the second shift motor 5 respectively.
[0079] Preferably, the limiting block 23 is provided with a clamping structure, and can be fixedly connected to the fixing rod 24 through the clamping structure.
[0080] Preferably, the limit block 23 can move along the extension direction of the fixing rod 24, and the distance between the limit block 23 moved to different positions and the output gear 43 is different, so that the compression state of the spring 22 arranged between the limit block 23 and the output gear 43 is different.
[0081] Preferably, the two simulated fork assemblies 2 have different fixed positions of the limit blocks 23 and / or basic parameters of the spring 22 and / or initial compression states of the spring 22. The basic parameters of the spring 22 include the length and elastic coefficient of the spring 22, so as to simulate the shifting force corresponding to the gears of different gear positions.
[0082] Preferably, the first gear-shifting motor 4 corresponds to the switching between the first gear and the second gear.
[0083] Preferably, the second gear-shifting motor 5 corresponds to the switching of three gears.
[0084] Preferably, in the simulated fork assembly 2 corresponding to the first shift motor 4 , both ends of the movable rack 21 abut against the springs 22 sleeved on the outer side of the fixed rack, and the other ends of the two springs 22 abut against the limit blocks 23 .
[0085] Preferably, in the simulated shift fork assembly 2 corresponding to the second shift motor 5 , only one end of the movable rack 21 abuts against the spring 22 sleeved on the outer side of the fixed rack, and the other end of the spring 22 abuts against the limit block 23 .
[0086] Preferably, the motor body is configured with a signal input terminal 41 and a signal output terminal 42 .
[0087] Preferably, the signal input terminal 41 is connected to the motor body.
[0088] Preferably, the signal output terminal 42 is connected to the angle sensor.
[0089] The above is a three-speed gearbox test bench for new energy commercial vehicles provided by one or more embodiments of this specification. Based on the same idea, this specification also provides a three-speed gearbox test system for new energy commercial vehicles.
[0090] Preferably, the three-speed gearbox test system for new energy commercial vehicles includes the three-speed gearbox test bench for new energy commercial vehicles provided by any one of the above embodiments.
[0091] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.
[0092] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.
[0093] The above description is only an embodiment of this specification and is not intended to limit this specification. For those skilled in the art, this specification may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this specification should be included in the scope of the claims of this application.
Claims
1. A three-speed gearbox test bench for new energy commercial vehicles, characterized in that: It includes a bench base, a simulation fork assembly, a test controller, a first shift motor and a second shift motor; The test controller is connected to the first shift motor and the second shift motor respectively, and can send a first shift instruction and a second shift instruction to the first shift motor and the second shift motor respectively based on the current gear position and the target gear position, and can also obtain a first shift angle output by the first shift motor and a second shift angle output by the second shift motor; The first shift motor and the second shift motor each include a motor body, an output gear and an angle sensor; the motor body can drive the output gear to rotate according to the first shift instruction or the second shift instruction, and the angle sensor can obtain the first shift angle or the second shift angle of the output gear and send it to the test controller; The simulated fork assembly includes a spring, a limit block, a movable rack and a fixed rod; the movable rack is sleeved on the outside of the fixed rod and meshes with the output gear, and can be driven by the output gear in the rotating process to move along the direction of the fixed rod; the movable rack is abutted against the spring sleeved on the outside of the fixed rod, and the other end of the spring is abutted against the limit block.
2. The three-speed gearbox test bench for new energy commercial vehicles according to claim 1 is characterized in that: The three-speed gearbox test bench for new energy commercial vehicles also includes a host computer; The host computer is connected to the test controller and can send the target gear position to the test controller; and can also obtain the first gear shift angle and the second gear shift angle.
3. The three-speed gearbox test bench for new energy commercial vehicles according to claim 2 is characterized in that: The host computer can determine a test result according to the target gear position, the first gear shift angle, and the second gear shift angle.
4. The three-speed gearbox test bench for new energy commercial vehicles according to claim 1, characterized in that: The test controller can update the current gear position according to the first gear shift angle and the second gear shift angle; and can also redetermine the first gear shift instruction and the second gear shift instruction according to the target gear position and the updated current gear position.
5. The three-speed gearbox test bench for new energy commercial vehicles according to claim 1 is characterized in that: The three-speed gearbox test bench of the new energy commercial vehicle is configured with two simulated shift fork assemblies, and the two simulated shift fork assemblies correspond to the first shift motor and the second shift motor respectively.
6. The three-speed gearbox test bench for new energy commercial vehicles according to claim 1, characterized in that: The limit block is provided with a clamping structure, and can be fixedly connected to the fixing rod through the clamping structure; The limit block can move along the extension direction of the fixing rod, and the distances between the limit block moved to different positions and the output gear are different, so that the compression states of the spring arranged between the limit block and the output gear are different.
7. The three-speed gearbox test bench for new energy commercial vehicles according to claim 5, characterized in that: The two simulated shift fork assemblies have different fixed positions of the limit blocks and / or basic parameters of the springs and / or initial compression states of the springs; The basic parameters of the spring include spring length and elastic coefficient.
8. The three-speed gearbox test bench for new energy commercial vehicles according to claim 5, characterized in that: The first shift motor corresponds to the switching between the first gear and the second gear; The second shift motor corresponds to the switching of three gears; In the simulated shift fork assembly corresponding to the first shift motor, both ends of the movable rack abut against the springs sleeved on the outer side of the fixed rack, and the other ends of the two springs abut against the limit blocks; In the simulated shift fork assembly corresponding to the second shift motor, only one end of the movable rack abuts against the spring sleeved on the outer side of the fixed rack, and the other end of the spring abuts against the limit block.
9. The three-speed gearbox test bench for new energy commercial vehicles according to claim 1, characterized in that: The motor body is configured with a signal input terminal and a signal output terminal; The signal input terminal is connected to the motor body; The signal output end is connected to the angle sensor.
10. A three-speed gearbox test system for new energy commercial vehicles, characterized in that: A three-speed gearbox test bench for new energy commercial vehicles comprising the test bench described in any one of claims 1 to 9.