A chassis dynamometer calibration device and chassis dynamometer system
By designing a chassis dynamometer calibration device and employing two sets of calibration and control mechanisms, the problem that traditional dynamometers cannot detect the chassis of new energy vehicles has been solved. This enables high-precision dual-axis speed detection of the chassis of new energy vehicles, improving the accuracy of the measurement and the applicability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI METROLOGY & TESTING TECHNOLOGY RESEARCH INSTITUTE CO LTD
- Filing Date
- 2025-08-29
- Publication Date
- 2026-07-07
AI Technical Summary
Traditional single-axis dynamometers cannot test the chassis of new energy vehicles, and the aging of dynamometer components leads to a large difference between the data and the actual value.
Design a chassis dynamometer calibration device, including two sets of calibration mechanisms and a control mechanism. The two sets of calibration mechanisms simultaneously measure the data of two rollers. The encoder and speed measuring wheel are used to receive and transmit data in real time. Combined with adjustment components and a magnetic base, it can adapt to chassis dynamometers of different specifications, thereby improving measurement accuracy and reliability.
It enables dual-axis speed detection of new energy vehicle chassis, improves measurement accuracy and reliability, enhances the versatility and applicability of the device, and ensures rapid data transmission and high-precision processing.
Smart Images
Figure CN224471197U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of calibration technology for new energy vehicle testing equipment, specifically to a chassis dynamometer calibration device and chassis dynamometer system. Background Technology
[0002] With the surge in production and sales of new energy vehicles in my country, the industry's demand for vehicle safety inspection has exploded. In vehicle safety inspection, chassis dynamometers are commonly used to test vehicle performance, including power output, emissions under various operating conditions, and fuel efficiency. The chassis dynamometer uses rollers to simulate a road surface, calculates road simulation equations, and uses a loading device to simulate and diagnose faults that occur in the vehicle under load, thus simulating various operating conditions of the vehicle.
[0003] However, traditional single-axle dynamometers can only be used to test the chassis of single-axle gasoline vehicles, while the chassis of new energy vehicles are all dual-axle, which means that single-axle dynamometers cannot test the chassis of new energy vehicles. In addition, with long-term use, the components of the dynamometer will age or there will be inherent deviations in the hardware system, which will gradually accumulate over time, eventually resulting in a large difference between the data measured by the dynamometer and the actual value.
[0004] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Utility Model Content
[0005] In view of this, this application provides a chassis dynamometer calibration device to solve at least one problem existing in the background art. The chassis dynamometer has two rollers spaced apart, and the calibration device includes:
[0006] Two sets of calibration mechanisms are used to simultaneously measure the data of two rollers;
[0007] The control mechanism includes a first interface and a second interface, which are respectively connected to the two sets of calibration mechanisms for receiving measurement data.
[0008] Each group of calibration facilities includes:
[0009] The base is used to fix the device at the target location.
[0010] An adjustment assembly, connected to the base, includes a vertical adjustment rod and a horizontal adjustment rod, wherein the vertical adjustment rod is connected to the base, and the first end of the horizontal adjustment rod is connected to the vertical adjustment rod;
[0011] The test assembly, mounted on the second end of the lateral adjustment rod by a clamp, includes a connector mounted on the clamp, an encoder mounted on the connector, and a speed measuring wheel connected to the encoder. The two encoders are respectively connected to the first interface and the second interface. The speed measuring wheel is connected to the encoder and is configured to contact the roller to follow the rotation of the roller. The encoder can receive data from the speed measuring wheel, convert the data into an electrical signal, and transmit it to the control mechanism.
[0012] Optionally, in the aforementioned chassis dynamometer calibration device, the encoder has a rotating shaft;
[0013] The speed measuring wheel includes a wheel body connected to the rotating shaft and a rubber sheet surrounding the outside of the wheel body, the rubber sheet being in contact with the roller.
[0014] Optionally, in the aforementioned chassis dynamometer calibration device, the speed measuring wheel is detachably connected to the encoder.
[0015] Optionally, in the aforementioned chassis dynamometer calibration device, the fixture is provided with mounting holes, the connector includes a connecting rod and a side plate, the connecting rod is configured such that one end is installed in the mounting hole and locked to the fixture by fastening, and the other end is fixedly connected to the side plate, and the encoder and the speed measuring wheel are connected to the side plate.
[0016] Optionally, in the aforementioned chassis dynamometer calibration device, the calibration mechanism further includes an elastic element, one end of which is fixed to the connecting rod and the other end of which is fixed to the side plate.
[0017] Optionally, in the aforementioned chassis dynamometer calibration device, the base is a magnetic base.
[0018] Optionally, in the aforementioned chassis dynamometer calibration device, the control mechanism includes a power module, a control module connected to the power module, and a display module connected to the control module. Both the first interface and the second interface are connected to the control module. The control module is used to receive measurement data transmitted through the first interface and the second interface, and to display the measurement data on the display module.
[0019] Optionally, in the aforementioned chassis dynamometer calibration device, the adjustment component is made of metal.
[0020] This application also provides a chassis dynamometer calibration system, comprising:
[0021] The calibration device is the chassis dynamometer calibration device described in any one of the above descriptions;
[0022] The chassis dynamometer includes two sets of rollers and a motor connected to the rollers. The two sets of rollers are spaced apart, and the motor can drive the rollers to rotate, thereby causing the speed measuring wheels of the two sets of test components to rotate simultaneously.
[0023] Compared with existing technologies, this application has the following advantages: By setting up two sets of calibration mechanisms and control mechanisms, the two sets of calibration mechanisms can simultaneously measure the data of two rollers, thereby realizing the detection of the dual-axis speed of the chassis dynamometer of new energy vehicles. Each set of calibration mechanisms includes a base, an adjustment component, and a test component. The adjustment component can adjust the position of the test component relative to the roller, so that the calibration device can quickly adapt to various chassis dynamometers of different specifications, improving the versatility and applicability of the calibration device. The encoder in the test component is directly connected to the speed measuring wheel, and the two encoders are respectively connected to the first interface and the second interface of the control mechanism, ensuring rapid transmission and high-precision processing of measurement data. After the speed measuring wheel contacts the roller, it can rotate with the roller, and the encoder can receive the data of the speed measuring wheel in real time and accurately, thereby improving the accuracy and reliability of the measurement. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the chassis dynamometer calibration device shown in this embodiment;
[0025] Figure 2 yes Figure 1 A partial enlarged view of A in the calibration device shown;
[0026] Figure 3 This is a schematic diagram of the chassis dynamometer calibration device shown in this embodiment from another direction;
[0027] Figure 4 This is a partial structural cross-sectional schematic diagram of the chassis dynamometer shown in this embodiment;
[0028] Figure 5 This is a schematic diagram of the chassis dynamometer system shown in this embodiment.
[0029] Figure Descriptions: 100-Roller, 1-Base, 2-Switch, 3-Nut, 4-Vertical Adjustment Rod, 5-Adjusting Component, 6-Universal Clamp, 61-First Mounting Part, 611-First Through Hole, 62-Second Mounting Part, 621-Second Through Hole, 7-Horizontal Adjustment Rod, 8-Clamp, 81-Mounting Hole, 82-Fastener, 9-Elastic Component, 10-Encoder, 101-Shaft, 11-Speed Measuring Wheel, 111-Wheel Body, 112-Rubber Sheet, 12-Connecting Cable, 13-Power Module, 14-Power Switch, 15-First Interface, 16-Second Interface, 17-Display Module, 18-Connecting Rod, 19-Side Plate. Detailed Implementation
[0030] The exemplary embodiments disclosed in this application will now be described in more detail. Numerous specific details are set forth in the following description to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be implemented without one or more of these details. In other instances, to avoid confusion with this application, some technical features well-known in the art have not been described; that is, not all features of actual embodiments are described herein, nor are well-known functions and structures described in detail.
[0031] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this application, the first element, component, area, layer, or portion discussed below may be referred to as a second element, component, area, layer, or portion. And the discussion of a second element, component, area, layer, or portion does not imply that the first element, component, area, layer, or portion necessarily exists in this application.
[0032] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used here for convenience to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of devices in use and operation.
[0033] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. When used herein, the singular forms “a,” “an,” and “ / the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “compose” and / or “comprising,” when used in this specification, identify the presence of features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.
[0034] To fully understand this application, detailed steps and structures will be presented in the following description to illustrate the technical solution of this application. Preferred embodiments of this application are described in detail below; however, in addition to these detailed descriptions, this application may have other implementation methods.
[0035] Please refer to Figure 5 As shown in the preferred embodiment of this application, a chassis dynamometer calibration system includes a chassis dynamometer calibration device (hereinafter referred to as the calibration device) and a chassis dynamometer. The chassis dynamometer includes two sets of rollers 100 and a motor connected to the rollers 100. The two sets of rollers 100 are spaced apart, and each set of rollers 100 corresponds to one of the two shafts of the new energy vehicle chassis. The motor can drive the rollers 100 to rotate, so that the chassis dynamometer can test the two sets of rollers 100 simultaneously. It should be noted that the chassis dynamometer described in this embodiment is a mature technology, and will not be described in detail here.
[0036] Further, refer to Figures 1-4 As shown, the dynamometer calibration device includes two sets of calibration mechanisms and a control mechanism. The two sets of calibration mechanisms are used to simultaneously measure data from the two rollers 100. The control mechanism includes a first interface 15 and a second interface 16, which are connected to the two sets of calibration mechanisms via connecting lines 12 to receive the measured data. In this embodiment, the data includes the rotational speeds of the two rollers 100 and the difference in rotational speed between the two rollers 100.
[0037] Understandably, by setting up two sets of calibration mechanisms, the two sets of calibration mechanisms can simultaneously measure the two sets of rollers 100, and transmit the measurement data to the control mechanism through the first interface 15 and the second interface 16, thereby realizing the measurement of the dynamic synchronization of the dual axes of the dynamometer for the chassis of new energy vehicles, and the measurement data is timely and accurate.
[0038] Specifically, each calibration mechanism includes a base 1 for fixing at the target position, an adjustment assembly connected to the base 1, and a testing assembly. The adjustment assembly includes a vertical adjustment rod 4 and a horizontal adjustment rod 7 connected to the base 1 via a nut 3. The first end of the horizontal adjustment rod 7 is connected to the vertical adjustment rod 4 via a universal clamp 6. Adjustment of the horizontal adjustment rod 7 and the vertical adjustment rod 4 can be achieved by operating the adjustment element 5 on the universal clamp 6.
[0039] More specifically, the universal clamp 6 includes a first mounting part 61 and a second mounting part 62. The first mounting part 61 is provided with a first through hole 611 for the vertical adjustment rod 4 to pass through and an adjusting member 5. The second mounting part 62 is provided with a second through hole 621 for the horizontal adjustment rod 7 to pass through and an adjusting member 5. During adjustment, simply adjust the horizontal adjustment rod 7 and the vertical adjustment rod 4 to the appropriate positions, and then rotate the corresponding adjusting member 5 to hold and fix it against the horizontal adjustment rod 7 or the vertical adjustment rod 4.
[0040] The test assembly is mounted on the second end of the lateral adjustment rod 7 via a clamp 8. In this embodiment, the clamp 8 and the second end of the lateral adjustment rod 7 are movable to facilitate adjustment of the relative position of the test assembly and the roller 100. The test assembly includes a connector mounted on the clamp 8, an encoder 10 mounted on the connector, and a speed measuring wheel 11 connected to the encoder 10. The two encoders 10 are respectively connected to the first interface 15 and the second interface 16 via connecting lines 12. The speed measuring wheel 11 is connected to the encoder 10 and is configured to contact the roller 100 to rotate with the roller 100. The encoder 10 can receive data from the speed measuring wheel 11 and convert the data into an electrical signal before transmitting it to the control mechanism.
[0041] Understandably, by setting the adjustable vertical adjustment rod 4, the height position of the test component relative to the roller 100 can be adjusted; the horizontal adjustment rod 7 can adjust the horizontal distance between the test component and the roller 100, thereby achieving all-round adjustment in conjunction with the vertical adjustment rod 4, and is suitable for different rollers 100.
[0042] It should be noted that in this embodiment, the adjustment component is made of metal, which has high strength and durability, can withstand greater mechanical stress, and extends the service life of the equipment.
[0043] Furthermore, the encoder 10 has a rotating shaft 101; the speed measuring wheel 11 includes a wheel body 111 connected to the rotating shaft 101 and a rubber sheet 112 surrounding the outside of the wheel body 111. The rubber sheet 112 contacts the roller 100 to provide better friction and reduce direct wear between the wheel body 111 and the roller 100, thereby extending the service life of the speed measuring wheel 11.
[0044] Furthermore, the speed measuring wheel 11 is detachably connected to the encoder 10, making the replacement and maintenance of the speed measuring wheel 11 more convenient and quick. When the speed measuring wheel 11 needs to be replaced due to wear or damage, it is not necessary to disassemble the entire test assembly; only the speed measuring wheel 11 needs to be replaced, which improves the maintenance efficiency of the equipment. In addition, the detachable connection between the speed measuring wheel 11 and the encoder 10 also allows for the use of rollers 100 of different specifications, preventing the speed measuring wheel 11 from having poor stability and affecting measurement accuracy when it is used with an incompatible roller 100.
[0045] In this embodiment, the speed measuring wheel 11 includes at least a first speed measuring wheel 11, a second speed measuring wheel 11, and a third speed measuring wheel 11. The diameter of the first diameter speed measuring wheel 11 is smaller than that of the second diameter speed measuring wheel 11, which is also smaller than that of the third diameter speed measuring wheel 11. Correspondingly, the roller 100 has at least three specifications, for example, diameters of 216mm, 420mm, and 452mm. That is, the first diameter speed measuring wheel 11 is used to measure the 216mm diameter roller 100, the second diameter speed measuring wheel 11 is used to measure the 420mm diameter roller 100, and the third diameter speed measuring wheel 11 is used to measure the 452mm diameter roller 100. This avoids the use of a small-diameter speed measuring wheel 11 with a large-diameter roller 100, where the large-diameter roller 100 drives the small-diameter speed measuring wheel 11 to rotate, causing the small-diameter speed measuring wheel 11 to rotate too fast, resulting in poor stability and increased wear on the speed measuring wheel 11.
[0046] Furthermore, the fixture 8 is provided with a mounting hole 81, and the connecting parts include a connecting rod 18 and a side plate 19. The connecting rod 18 is configured such that one end is installed in the mounting hole 81 and locked to the fixture 8 by a fastener 82, and the other end is fixedly connected to the side plate 19. The encoder 10 and the speed measuring wheel 11 are connected to the side plate 19, so that the connecting rod 18 can be movably connected by the fastener 82 to adjust the angle between the speed measuring wheel 11 and the lateral adjustment rod 7.
[0047] Furthermore, the calibration mechanism also includes an elastic element 9 disposed on the connecting member. This elastic element 9 is a tension spring, with one end fixed to the connecting rod 18 and the other end fixed to the side plate 19. This allows the vibration generated by the speed measuring wheel 11 during operation to be transmitted to the side plate 19 and absorbed and reduced by the tension spring, thereby reducing the impact of vibration on the data measured by the speed measuring wheel 11 and improving calibration accuracy. (Roll 100)
[0048] Furthermore, the base 1 is a magnetic base, which not only facilitates installation and removal but also provides stable support, ensuring the stability of the equipment during testing and reducing measurement errors caused by loosening or displacement of the base 1. In this embodiment, a switch 2 is provided on the base 1, and the installation and removal of the base 1 are realized by operating the switch 2. The magnetic base 1 is a relatively mature technology in the field, and will not be described in detail here.
[0049] Furthermore, the control mechanism includes a power module 13, a control module connected to the power module 13, a display module 17 connected to the control module, and a power switch 14 connected to the power module 13. The first interface 15 and the second interface 16 are both connected to the control module. The control module is used to receive the measurement data transmitted through the first interface 15 and the second interface 16, and display the measurement data on the display module 17, which is convenient for testers to view and record in real time, thereby improving the efficiency and accuracy of the test.
[0050] In summary, the working process of the chassis dynamometer system shown in this application is as follows: the motor is started to drive the two sets of rollers 100 to rotate simultaneously to simulate the driving of a new energy vehicle. The chassis dynamometer calibration device is fixed to one side of the rollers 100 by the base 1, and the positions of the two speed measuring wheels 11 relative to the two sets of rollers 100 are adjusted by the adjustment component so that the two speed measuring wheels 11 contact the two sets of rollers 100 respectively and are driven to rotate by the two sets of rollers 100 respectively. The two speed measuring wheels 11 transmit the measured data to the control mechanism through the two encoders 10 respectively to calculate the data of the two sets of rollers 100. The measured data is compared with the standard value of the rollers 100 to obtain the error. This data includes the rotation speed of the two rollers 100 and the difference in rotation speed between the two rollers 100, thereby realizing the calibration of the chassis dynamometer.
[0051] The above is only one specific implementation of this application, and any other improvements made based on the concept of this application shall be considered within the scope of protection of this application.
Claims
1. A chassis dynamometer calibration device, characterized in that, The chassis dynamometer has two rollers spaced apart, and the calibration device includes: Two calibration mechanisms are used to simultaneously measure the data of two rollers; The control mechanism includes a first interface and a second interface, which are respectively connected to the two sets of calibration mechanisms for receiving measurement data. Each group of calibration facilities includes: The base is used to fix the device at the target location. An adjustment assembly, connected to the base, includes a vertical adjustment rod and a horizontal adjustment rod, wherein the vertical adjustment rod is connected to the base, and the first end of the horizontal adjustment rod is connected to the vertical adjustment rod; The test assembly, mounted on the second end of the lateral adjustment rod by a clamp, includes a connector mounted on the clamp, an encoder mounted on the connector, and a speed measuring wheel connected to the encoder. The two encoders are respectively connected to the first interface and the second interface. The speed measuring wheel is connected to the encoder and is configured to contact the roller to follow the rotation of the roller. The encoder can receive data from the speed measuring wheel, convert the data into an electrical signal, and transmit it to the control mechanism.
2. The chassis dynamometer calibration device according to claim 1, characterized in that, The encoder has a rotating shaft; The speed measuring wheel includes a wheel body connected to the rotating shaft and a rubber sheet surrounding the outside of the wheel body, the rubber sheet being in contact with the roller.
3. The chassis dynamometer calibration device according to claim 2, characterized in that, The speed measuring wheel is detachably connected to the encoder.
4. The chassis dynamometer calibration device according to claim 1, characterized in that, The fixture is provided with mounting holes, and the connector includes a connecting rod and a side plate. The connecting rod is configured such that one end is installed in the mounting hole and locked to the fixture by fasteners, and the other end is fixedly connected to the side plate. The encoder and the speed measuring wheel are connected to the side plate.
5. The chassis dynamometer calibration device according to claim 4, characterized in that, The calibration mechanism also includes an elastic element, one end of which is fixed to the connecting rod and the other end of which is fixed to the side plate.
6. The chassis dynamometer calibration device according to claim 1, characterized in that, The base is a magnetic base.
7. The chassis dynamometer calibration device according to claim 1, characterized in that, The control mechanism includes a power module, a control module connected to the power module, and a display module connected to the control module. The first interface and the second interface are both connected to the control module. The control module is used to receive measurement data transmitted through the first interface and the second interface, and to display the measurement data on the display module.
8. The chassis dynamometer calibration device according to claim 1, characterized in that, The adjustment component is made of metal.
9. A chassis dynamometer system, characterized in that, include: The calibration device is a chassis dynamometer calibration device as described in any one of claims 1-8; The chassis dynamometer includes two sets of rollers and a motor connected to the rollers. The two sets of rollers are spaced apart, and the motor can drive the rollers to rotate, thereby causing the speed measuring wheels of the two sets of test components to rotate simultaneously.