CN211234980U

CN211234980U - Comprehensive detection rack

Info

Publication number: CN211234980U
Application number: CN201922286792.4U
Authority: CN
Inventors: 张志勇; 冯浩; 潘少猷
Original assignee: Academy Of Forensic Science
Current assignee: Academy Of Forensic Science
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-08-11
Anticipated expiration: 2029-12-17

Abstract

The utility model relates to a comprehensive detection rack. The comprehensive detection rack is suitable for the detection of electric small vehicles and comprises a base; the rotary drum device is arranged on the base and comprises a first bearing seat and a second bearing seat, an active rotary drum is arranged on the first bearing seat, a passive rotary drum is arranged on the second bearing seat, the active rotary drum and the passive rotary drum are horizontally arranged at intervals, and the axes of the active rotary drum and the passive rotary drum are parallel and equal in height; the coupling is connected with a drum shaft of the driving drum; the frequency converter and the variable frequency motor are electrically connected and arranged on the base, and an output shaft of the variable frequency motor is fixedly connected with the drum shaft through a coupler; the extension platform is foldable and is arranged on one side of the base. The utility model provides a comprehensive detection rack, compact structure, simple to operate and ability rapid survey electric small vehicle's the speed of a motor vehicle and power.

Description

Comprehensive detection rack

Technical Field

The utility model relates to a test technical field of motor vehicle especially relates to a comprehensive testing rack, is applicable to electric small vehicle's detection.

Background

With the improvement of the social and economic living standard, the air pollution of the large cities cannot be ignored, the automobile emission is one of the main pollution sources, and 10 cities in China are listed in 20 cities with the most serious global air pollution. The average number of automobiles per 1000 people in China is 10, but because of insufficient petroleum resources, millions of tons of petroleum are imported each year, and with the development of economy, if the quantity of automobiles per 1000 people in China reaches the global level, namely 110 automobiles per 1000 people, the quantity of automobiles in China is increased by 10 times, and the petroleum import becomes a big problem.

Therefore, the research and development of the electric small-sized vehicle in China is not a temporary short-term measure, but a significant and long-term strategic consideration. With the widespread use of small electric vehicles, higher demands have been made on special tools for detection. Furthermore, the domestic station almost has no research on how to effectively and conveniently solve the practical technical problem of the parameter detection of the electric small-sized vehicle in the judicial appraisal perspective. In the research on the technical standard parameters of the electric vehicle and the traffic safety, there are "the research on the association between the technical standard parameters of the electric bicycle and the traffic safety" published by Zhao Ming, etc. in the research center of the road traffic safety of the Ming, Luoyang, Moyi Ming, etc. published in "the design of the automatic detector for armature parameters of the traction motor in the electromechanical engineering technology", and the research on the detection of the technical parameters of the motorcycle similar to the electric small-sized vehicle, such as "the design of the detection line for the performance of the whole motorcycle" published in "the small internal combustion engine and the motorcycle", the design of the detection system for the speed of the motorcycle, the design and analysis of the detection system for the braking performance ", etc., in the research on the technical parameters of the motorcycle, such as Gao hong, Li Ping, Hu Wei, and Wuhan Rio Rao Ming Dynash university, The von hong Gao et al of university in southeast put forward relevant concepts of developing a factory performance batch detection platform of electric vehicles in the aspect of manufacturing the electric vehicles. At present, a special rapid testing device for the electric small-sized vehicle is lacked.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned problem of prior art, the utility model provides a comprehensive testing rack, compact structure, simple to operate and ability rapid survey electric small vehicle's the speed of a motor vehicle and power.

Specifically, the utility model provides a comprehensive testing rack is applicable to electric small vehicle's detection, include:

a base;

the rotary drum device is arranged on the base and comprises a first bearing seat and a second bearing seat, an active rotary drum is arranged on the first bearing seat, a passive rotary drum is arranged on the second bearing seat, the active rotary drum and the passive rotary drum are horizontally arranged at intervals, and the axes of the active rotary drum and the passive rotary drum are parallel and have the same height;

the coupling is connected with a drum shaft of the driving drum;

the frequency converter and the variable frequency motor are electrically connected and arranged on the base, and an output shaft of the variable frequency motor is fixedly connected with the rotary drum shaft through the coupler;

the extension platform is foldable and is arranged on one side of the base.

According to the utility model discloses an embodiment, still including setting up dynamic braking unit on the base, with inverter motor connects, the dynamic braking unit is used for right inverter motor implements the braking.

According to the utility model discloses an embodiment, the drum of initiative rotary drum and passive rotary drum is faced respective axis indent, the terminal surface of initiative rotary drum and passive rotary drum flushes.

According to the utility model discloses an embodiment, the radian of the drum face indent of initiative rotary drum and passive rotary drum is the same, the lower at the drum face top of initiative rotary drum and passive rotary drum with the mesa of extension platform is high, is in on the same horizontal plane.

According to the utility model discloses an embodiment, the drumhead of initiative rotary drum and passive rotary drum adopts shot peening, and minimum equivalent friction coefficient is not less than 0.5.

According to the utility model discloses an embodiment, extension platform includes:

the first flat plate frame, the second flat plate frame and the third flat plate frame are all rectangular hollow structures and are arranged along the length direction, one side of the second flat plate frame is hinged with one side of the first flat plate frame through a hinge, the other side of the second flat plate frame is hinged with one side of the third flat plate frame through a hinge, the first flat plate frame and the third flat plate frame can be respectively turned over towards the second flat plate frame, so that the first flat plate frame and the third flat plate frame can be unfolded in the same horizontal plane through outward turning of the first flat plate frame and the second flat plate frame, the top of the first flat plate frame is attached to the top of the second flat plate frame after the first flat plate frame and the third flat plate frame are turned inwards, and the bottom of the third flat plate frame is attached to the bottom of the second flat;

the bottom of the first flat plate frame is provided with a first supporting leg which is in running fit with the first flat plate frame, the first supporting leg can be contained in the first flat plate frame when being turned inwards, and the first supporting leg can be fixed at a position which is vertical to the plane where the first flat plate frame is located when being turned outwards;

the bottom of the second flat plate frame is provided with a second supporting leg which is in running fit with the second flat plate frame, the second supporting leg can be contained in the second flat plate frame after being turned inwards, and the second supporting leg can be fixed at a position which is vertical to the plane where the second flat plate frame is located after being turned outwards;

and a third supporting leg which is in running fit with the third flat plate frame is arranged at the bottom of the third flat plate frame, the third supporting leg can be contained in the third flat plate frame by inwards turning, and the third supporting leg can be fixed at a position which is vertical to the plane where the third flat plate frame is located by outwards turning.

According to the utility model discloses an embodiment, extension platform still includes three fixing device, sets up respectively on first flat plate frame, second flat plate frame and the third flat plate frame to be used for fixing respectively first supporting legs, second supporting legs and third supporting legs.

According to the utility model discloses an embodiment, fixing device includes an extension spring, and its one end is fixed in one of first flat board frame, second flat board frame or third flat board frame, the other end is fixed corresponding on first supporting legs, second supporting legs or the third supporting legs.

According to an embodiment of the present invention, the fixing device includes an extension spring, one end of which is fixed to one of the first plate frame, the second plate frame or the third plate frame, and the other end of which is fixed to the corresponding first supporting foot, the second supporting foot or the third supporting foot; and anti-skid planks are fixedly arranged on the first flat plate frame, the second flat plate frame and the third flat plate frame respectively.

According to an embodiment of the present invention, the handle is fixed to both sides of the base.

The utility model provides a pair of comprehensive detection rack, compact structure, simple to operate and ability rapid survey electric small vehicle's the speed of a motor vehicle and power.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principle of the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a comprehensive testing bench according to an embodiment of the present invention.

Fig. 2 is a partial side view of fig. 1.

Fig. 3 is another partial side schematic view of fig. 1.

Fig. 4 shows a schematic structural diagram of the expansion platform in fig. 1.

Fig. 5 is a cross-sectional view along AA of fig. 4.

Fig. 6 shows a usage state diagram of the extended platform in fig. 1.

Fig. 7 shows a schematic structural view of the drum device in fig. 1.

Fig. 8 shows a top view of the drum arrangement of fig. 1.

Fig. 9 shows a schematic side view of the drum arrangement of fig. 1.

Wherein the figures include the following reference numerals:

integrated test gantry 100 base 101

First bearing seat 201 of rotary drum device 200

Second bearing housing 202 drives drum 203

Drum heads

205, 206 of passive drum 204

Drum shaft 207

Coupling 300

Frequency converter 400

Variable frequency motor 500

Expansion platform 600 first plate frame 601

Second plate frame 602 third plate frame 603

Hinge 604 first support foot 605

Second support leg 606 third support leg 607

Extension spring 608 draw hook 609

Reinforcing rib 610 anti-slip decking 611

Rotating shaft 612

Dynamic braking unit 700

Handle 800

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

Fig. 1 shows a schematic structural diagram of a comprehensive testing bench according to an embodiment of the present invention. Fig. 2 is a partial side view of fig. 1. Fig. 3 is another partial side schematic view of fig. 1. As shown in the figure, the comprehensive detection rack 100 suitable for detecting the electric small vehicle mainly comprises a base 101, a rotary drum device 200, a coupler 300, a frequency converter 400, a variable frequency motor 500 and an expansion platform 600.

Wherein the drum device 200 is disposed on the base 101. Fig. 7 shows a schematic structural view of the drum device in fig. 1. Fig. 8 shows a top view of the drum arrangement of fig. 1. Fig. 9 shows a schematic side view of the drum arrangement of fig. 1. As shown, the drum device 200 includes a first bearing housing 201 and a second bearing housing 202. The first bearing seat 201 is supported by an active rotary drum 203, the second bearing seat 202 is provided with a passive rotary drum 204, the active rotary drum 203 and the passive rotary drum 204 are horizontally arranged at intervals, and the axes of the active rotary drum 203 and the passive rotary drum 204 are parallel and have the same height. Specifically, the active drum 203 is supported by the first bearing housing 201, and the passive drum 204 is supported by the second bearing housing 202. The axes of the driving drum 203 and the driven drum 204 are parallel to each other and on the same horizontal plane. It is easy to understand that the rear tire of the electric vehicle is suitable for being placed between the driving drum 203 and the driven drum 204, and the rear tire of the electric vehicle rotates to drive the driving drum 203 and the driven drum 204 to rotate.

One side of the shaft coupling 300 is connected with the drum shaft 207 of the driving drum 203, and the other side is connected with the output shaft of the variable frequency motor 500. The coupling 300 is used to transmit the rotational power of the drum shaft 207 of the driving drum 203 to the output shaft of the inverter motor 500, or to transmit the rotational power of the output shaft of the inverter motor 500 to the drum shaft 207 of the driving drum 203.

The frequency converter 400 is electrically connected to the variable frequency motor 500, and the frequency converter 400 is used for controlling the operating frequency of the variable frequency motor 500, which is equivalent to controlling the rotating speed and torque of the output shaft of the variable frequency motor 500. The frequency converter 400 and the frequency conversion motor 500 are both provided on the base 101.

The extension platform 600 is foldable, and the extension platform 600 is disposed at one side of the base 101 and is used for supporting a front wheel portion of the electric small vehicle. The main function of the docking station 600 is to guide the vehicle into a detection position, and the docking station 600 carries the electric small vehicle together with the drum device 200.

Preferably, the integrated test stand 100 further comprises a dynamic braking unit 700 disposed on the base 101. By way of example and not limitation, four dynamic braking units 700 are employed in the present embodiment. These dynamic braking units 700 are connected to the inverter motor 500 for braking the inverter motor 500. When the inverter motor 500 is decelerated, the load of the inverter motor 500 is conducted and consumed on the braking resistor of the dynamic braking unit 700, so as to improve the braking capability of the inverter 400 and ensure that the inverter motor 500 can be rapidly braked within a set time.

Preferably, the drum surface 205 of the active drum 203 is concave towards its drum axis, and the drum surface 206 of the passive drum 204 is concave towards its drum axis. In the process of detecting the electric small vehicle, a rear wheel of the vehicle is placed between the driving rotary drum 203 and the driven rotary drum 204, the tire tread of the rear wheel is attached to the concave positions of the drum surfaces 205 and 206 of the driving rotary drum 203 and the driven rotary drum 204, and the axle center of the rear wheel is consistent with the axial direction of the driving rotary drum 203 and the driven rotary drum 204. And starting the vehicle, and rotating the rear wheels to drive the driving rotary drum 203 and the driven rotary drum 204 to synchronously rotate. The structure of the

drumheads

205, 206 allows the rear tire of the electric vehicle to be located in the recessed position of the two drum heads 205, 206 at all times during rotation. The end faces of the driving drum 203 and the driven drum 204 are flush for convenient installation. Preferably, the active drum 203 and the passive drum 204 are the same size, so that the drum heads 205 and 206 of the active drum 203 and the passive drum 204 are at the same height position for better bearing the rear tire tread.

Preferably, referring to fig. 8, the drum surface 205 at the axial cross-sectional position of the driving drum 203 is arc-shaped, and the drum surface 206 at the axial cross-sectional position of the driven drum 203 is arc-shaped, and the two arc degrees are the same. The shape of the drum surfaces 205 and 206 of the active drum 203 and the passive drum 204 can be better fit with the rear tire surface of the electric small vehicle. In the test process, when the rear wheel of the vehicle deviates to one side, the arc-shaped drum surfaces 205 and 206 can guide the tire to the lowest point, so that the stability of the vehicle is kept, and the detection accuracy is improved. Meanwhile, the lowest positions of the tops of the drum surfaces 205 and 206 of the driving rotary drum 203 and the driven rotary drum 204 are as high as the table top of the expansion platform 600 and are positioned on the same horizontal plane, so that the front wheels and the rear wheels of the electric small vehicle are at the same height, and the test interference is reduced.

Preferably, the drum surfaces 205, 206 of the active drum 203 and the passive drum 204 are shot-blasted, and the minimum equivalent friction coefficient is not less than 0.5. Shot peening is a surface strengthening process, a cold working process that bombards the drumhead with pellets and implants residual compressive stresses that increase the fatigue strength of the

drumhead

205, 206. Shot peening is used to improve the mechanical strength as well as wear resistance, fatigue resistance, and corrosion resistance of the

drumheads

205, 206. Preferably, the drum shaft 207 of the driving drum 203 is connected to the bearing inner hole of the first bearing seat 201 in a matching manner, so that the test accuracy deviation caused by the influence of friction force generated at the position of the drum shaft 207 on the torque when the driving drum 203 rotates can be avoided.

Fig. 4 shows a schematic structural diagram of the expansion platform in fig. 1. Fig. 5 is a cross-sectional view along AA of fig. 4. Fig. 6 shows a usage state diagram of the extended platform in fig. 1. As shown in fig. 1, the expansion platform 600 includes at least a first plate frame 601, a second plate frame 602, and a third plate frame 603. The first plate frame 601, the second plate frame 602, and the third plate frame 603 are rectangular hollow structures, and are arranged along the length direction. The second plate frame 602 is located between the first plate frame 601 and the third plate frame 603. One side of the second plate frame 602 is hinged to one side of the first plate frame 601 through a hinge 604, and the other side of the second plate frame 602 is also hinged to one side of the third plate frame 603 through a hinge 604.

The first and third

flat frames

601 and 603 can be respectively turned over toward the second flat frame 602 by the hinge 604, so that the first, second and third

flat frames

601, 602 and 603 can be switched between the unfolded state and the folded state. In the unfolded state, the first plate frame 601 and the third plate frame 603 are turned outwards relative to the second plate frame 602, so that the three can be unfolded in the same horizontal plane. In the folded state, the first and third

flat plates

601 and 603 are turned inward relative to the second flat plate 602 so that the top of the first flat plate 601 is attached to the top of the second flat plate 602, and the bottom of the third flat plate 603 is attached to the bottom of the second flat plate 602. It is easy to understand that the folding state of the expanding platform 600 is equivalent to the folding state of the first plate frame 601, the second plate frame 602 and the third plate frame 603 in a zigzag manner.

Further, a first supporting leg 605 rotatably engaged with the first flat plate frame 601 is provided at the bottom of the first flat plate frame 601. The first support foot 605 can be switched between an operating state and a stowed state. In the expanded state of the expansion platform 600, the first supporting leg 605 can be turned inward, that is, rotated toward the bottom surface of the first platform frame 601, so that the first supporting leg 605 is rotated into the first platform frame 601, which is equivalent to being accommodated in the first platform frame 601, thereby forming the storage state of the first supporting leg 605. Conversely, the first supporting leg 605 can be fixed at a position perpendicular to the plane of the first plate frame 601 after being turned outwards, so as to support the first plate frame 601 and enter the working state.

Similarly, a second support foot 606 is provided at the bottom of the second plate frame 602, and is rotatably engaged with the second plate frame 602. Like the first support foot 605, the second support foot 606 is switchable between an operating state and a stowed state. When the expansion platform 600 is in the unfolded state, the second support leg 606 can be turned inward, i.e. turned toward the bottom surface of the second flat plate frame 602, so that the second support leg 606 is turned into the second flat plate frame 602, which is equivalent to being taken into the second flat plate frame 602, thereby forming a storage state of the second support leg 606. Conversely, the second support leg 606 can be turned outward and fixed at a position perpendicular to the plane of the second plate frame 602 for supporting the second plate frame 602 to enter the working state.

Correspondingly, a third supporting leg 607 rotatably engaged with the third plate frame 603 is provided at the bottom of the third plate frame 603. Like the first support leg 605, the third support leg 607 can be switched between the operating state and the housed state. In the expanded state of the expansion platform 600, the third supporting leg 607 can be turned inward, i.e. turned toward the bottom surface of the third plate rack 603, so that the third supporting leg 607 is turned into the third plate rack 603, which is equivalent to being received in the third plate rack 603, thereby forming a receiving state of the third supporting leg 607. Conversely, the outward rotation of the third support 607 can be fixed in a position perpendicular to the plane of the third plate member 603 for supporting the third plate member 603 into an operative position.

In actual operation, the first plate frame 601, the second plate frame 602 and the third plate frame 603 are turned to the unfolded state, and the first supporting foot 605, the second supporting foot 606 and the third supporting foot 607 are turned outwards continuously. The first support foot 605, the second support foot 606 and the third support foot 607 are stabilized on the ground, so that the first flat plate frame 601, the second flat plate frame 602 and the third flat plate frame 603 are unfolded in the same plane. Before testing, the side of the third flat plate frame 603 not connected to the second flat plate frame 602 is fixed to the testing machine frame, and the first supporting leg 605 is folded inward, so that the side of the first flat plate frame 601 not connected to the second flat plate frame 602 is grounded, and a slope is formed on the surface of the first flat plate frame 601. The electric small vehicle to be tested may be sequentially moved along the slope along the surfaces of the first flat plate frame 601, the second flat plate frame 602, and the third flat plate frame 603 to the drum device 200 on the integrated inspection machine frame 100. At this time, the first supporting leg 605 may be lifted up to make the front and rear wheel connecting lines of the vehicle in a horizontal position, the front wheel being supported by the extension platform 600 and the rear wheel being supported by the drum device 200.

Preferably, docking platform 600 also includes three fixtures. Three fixing means are provided on the first plate frame 601, the second plate frame 602, and the third plate frame 603, respectively. The three fixing devices are used for fixing the first supporting foot 605, the second supporting foot 606 and the third supporting foot 607 respectively. Preferably, the fixing device includes an extension spring 608, one end of which is fixed to one of the first plate frame 601, the second plate frame 602 or the third plate frame 603, and the other end of which is fixed to the corresponding first supporting foot 605, the second supporting foot 606 or the third supporting foot 607. Specifically, the position at which the tension spring 608 is fixed to each pallet falls outside the tilting stroke of each support foot. Referring to fig. 1, the first support foot 605 is actually movable within a limited stroke so that it can be switched between an operating state and a storage state. In fig. 5, the first supporting leg 605 is in an operating state, which is perpendicular to the first flat plate frame 601, and since the extension spring 608 is outside the tilting stroke of the first supporting leg 605, which corresponds to an outward pulling force applied to the first supporting leg 605, the first supporting leg 605 is structurally limited to the vertical position of the first flat plate frame 601, thereby firmly fixing the position of the first supporting leg 605. It will be readily appreciated that the extension spring 608 may also secure the first support foot 605 in the stowed position when the first support foot 605 is flipped inwardly into the stowed condition. Similarly, the extension springs 608 disposed on the second plate frame 602 and the third plate frame 603 also serve to fix the specific positions of the second support foot 606 and the third support foot 607 in the working state and the storage state, respectively, so as to facilitate the expansion and storage of the expansion platform 600.

Preferably, the other end of the extension spring 608 is provided with a hook 609, and the extension spring 608 is fixed on the corresponding first support foot 605, second support foot 606 or third support foot 607 through the hook 609. In this way, the extension spring 608 may be separated from each support foot for easy removal and replacement. Optionally, the draw hook 609 can also be directly fixed on the first support leg 605, the second support leg 606 or the third support leg 607, and the draw hook 609 is hung on the bottom end of the extension spring 608, so as to play a role in fixing.

Preferably, the first plate frame 601, the second plate frame 602 and the third plate frame 603 are provided with reinforcing ribs 610. The length direction of the reinforcing rib 610 is perpendicular to the length direction of the expansion platform 600, so that the overall structure of the expansion platform 600 is more stable, and the accuracy of a test result is ensured.

Preferably, the first plate frame 601, the second plate frame 602 and the third plate frame 603 have the same size and structure. The first supporting leg 605, the second supporting leg 606 and the third supporting leg 607 have the same size and structure, so that the industrial mass production and the assembly are facilitated.

Preferably, anti-skid planks 611 are fixedly disposed on the first flat plate frame 601, the second flat plate frame 602 and the third flat plate frame 603, respectively, and are suitable for electric cars to smoothly run on the expansion platform 600. Preferably, the anti-skid planking 611 is made of an aluminum alloy material, so that the anti-skid planking is light and has a good using effect.

Preferably, the first supporting foot 605, the second supporting foot 606 or the third supporting foot 607 are respectively rotatably engaged with the corresponding first plate frame 601, the second plate frame 602 or the third plate frame 603 through the rotating shaft 612. The turning stroke of each supporting leg is limited between a storage state and a working state.

Referring to fig. 5 and fig. 1, after the test of the electric small vehicle is completed, the first flat plate frame 601, the second flat plate frame 602 and the third flat plate frame 603 are held, the draw hook 609 is disengaged, and the first supporting foot 605, the second supporting foot 606 and the third supporting foot 607 are turned right and upward, so that the first supporting foot 605, the second supporting foot 606 and the third supporting foot 607 are retracted into the frame structure of the first flat plate frame 601, the second flat plate frame 602 and the third flat plate frame 603. Then, the first flat plate rack 601 is turned upwards and rightwards along the hinge 604 towards the second flat plate rack 602, so that the top of the first flat plate rack 601 is attached to the top of the second flat plate rack 602. Meanwhile, the third plate frame 603 is turned over to the second plate frame 602 along the hinge 604 from left to bottom, so that the bottom of the third plate frame 603 fits the bottom of the second plate frame 602. The foldable platform 600 is folded in a zigzag manner, and is conveniently stored on the base 101 and then unfolded for the next use.

Preferably, the handle 800 is fixedly installed on both sides of the base 101, so as to facilitate the transportation and movement of the integrated test platform 100.

The utility model provides a pair of comprehensive detection rack mainly used detects electric small-size vehicle's the highest speed of a motor vehicle, relevant parameters such as motor power. The concrete description is as follows:

maximum vehicle speed

The electric small-sized vehicle on the road mainly adopts an integrated hub motor for two-wheeled or three-wheeled electric vehicles, has simple and compact structure, and does not have a speed change and transmission system, so the rotating speed of a driving motor is the rotating speed of a driving wheel. Therefore, the maximum speed that the vehicle can reach theoretically is related to the working voltage, the working current, the output power and the rolling radius of the wheels of the motor. The actual electric small-sized vehicle is usually provided with a controller for controlling the output current and voltage of the storage battery so as to control the rotating speed and power of the motor, namely, the speed of the whole vehicle, and the main functions of the vehicle are stepless speed regulation, brake power failure, current-limiting protection, undervoltage protection, speed limitation, speed-per-hour display, power assistance and the like.

When the electric small-sized vehicle runs at a vehicle speed v, there is,

v＝2πr/T＝2πrf＝2πrn，

r-wheel radius (rolling radius in actual driving);

t-period (related to frequency f, f-1/T);

n-rotational speed (in r/s).

The angular velocity omega of the wheel is such that,

ω 2 pi/T2 pi f 2 pi n with rad/s.

Relationship of linear velocity v to wheel angular velocity ω: the rear wheel does uniform circular motion with radius r, the arc length passing through the rear wheel within the time t is s, the angle of radius rotation is theta, then,

s-r θ, v-s/t-r θ/t-r ω, i.e., v- ω r.

By detecting the speed of the vehicle from the above relationship, the running speed of the electric small vehicle can be obtained by detecting the parameters of the angular speed ω and the rotation speed n of the vehicle.

Motor power

The storage battery provides energy, the controller supplies electric energy to the vehicle motor, the motor converts chemical energy of the battery into mechanical energy, the rotation energy is converted into working voltage of the mechanical traction force motor, the working voltage is inversely proportional to the working current, and the power of the motor is proportional to the climbing capacity.

The power of the motor is divided into two types, one is the total power actually consumed by the motor during operation, including output torque, electromagnetic loss, copper loss, air gap loss, friction loss, heat generation and the like represented by the above reasons, and the other is the output power, and the ratio of the output power to the maximum consumed power of the motor is called the efficiency η of the motor^【7】. The motor power in GB17761-1999 "universal technical conditions for electric bicycles" refers to the output power.

In the operation of the electric vehicle, the power P of the motor:

P＝F·v·μ/η

wherein F is the total weight of the load;

v-electric vehicle movement speed;

mu-coefficient of friction between the electric vehicle and the road (determined according to road surface conditions);

eta, motor efficiency, is generally between 0.7 and 0.9.

On a slope, P_P(Fsin α + μ Fcos α) v/η, where α is the gradient of the road.

From the relationship of power, torque and speed:

T＝9.55P/n

wherein P is power (W);

t-torque (N.m);

n-rotational speed (r/min).

From the above relationship, the motor output can be calculated by detecting the vehicle motor torque T and the rotation speed n parameters.

Method for detecting related parameters of electric vehicle

At present, although there are standards for defining conditions of electric bicycles and related technical parameters, the standards strictly define the maximum speed km/h of the electric bicycle, the output power W or kW of the electric motor, the braking distance m, and the like, general inspectors and consumers do not know the above standards, and they have no knowledge about what structure and parameter conditions the electric bicycle satisfies, and even if they know that the technical standards exist, they lack effective means or methods for evaluating the vehicles by the technical parameters required in the standards.

During a speed detection test, the rear wheel of the electric small vehicle is required to be arranged between the driving rotary drum 203 and the driven rotary drum 204, the front wheel and the vehicle body are fixedly clamped, a vehicle starting power supply is switched on, the accelerating rotary handle is gradually rotated to the maximum position, after the vehicle speed is stable, the rotating speed of the driving rotary drum is measured through a rotating speed sensor arranged on the driving rotary drum, and the maximum vehicle speed of the vehicle can be converted. At the same time, the acceleration time and the driving distance of the vehicle from a certain rotating speed to another rotating speed can also be measured. When the electric vehicle with the speedometer is checked, the front wheel of the electric vehicle is placed between the driving rotary drum 203 and the driven rotary drum 204 to clamp the rear wheel and the vehicle body, the driving rotary drum and the front wheel are driven to rotate through the variable frequency motor, and when an indicated value of the speedometer is stabilized to a certain value, the indicated value is compared with an actual speed value shown by a rotating speed sensor arranged on a roller, so that whether the speedometer is qualified or not is judged.

The utility model provides a pair of synthesize standard that detects rack is suitable for as follows: according to the running characteristics of a two-wheeled or three-wheeled vehicle in an electric driving mode, by referring to the analysis of related technical requirements of GB17761-1999 Universal technical Condition for electric bicycles, GB17761-2018 safety technical Specification for electric bicycles and GB7258-2012 safety technical Condition for Motor vehicle running, the maximum speed, the motor power and whether the electric driving vehicle has pedal running capability are determined, and the attribute and the performance problem of the electric driving vehicle can be detected and judged.

The utility model provides a pair of comprehensive testing rack, adopt the detection solution of rotary drum device, place on initiative rotary drum and passive rotary drum through the rear wheel (motor drive wheel) that will be surveyed electronic small-size vehicle, drive initiative rotary drum and passive rotary drum rotation by the vehicle rear wheel, with the rotation that the straight line travel of vehicle on the road surface turned into the rotary drum, the control of inverter motor and converter is passed through to the initiative rotary drum, the acceleration of simulation electric vehicle when the road surface is gone, travel state such as braking, thereby it is unanimous as far as possible when guaranteeing test environment on the comprehensive testing rack and road surface to go, it detects the real in service behavior of data reflection electronic small-size vehicle, with the true power that detects electronic small-size vehicle motor, brake force, the maximum speed of a motor vehicle that can reach, thereby can effectively prevent the law enforcement dynamics, guarantee road traffic safety cons.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. Synthesize and detect rack is applicable to electric small vehicle's detection, its characterized in that includes:

a base;

the coupling is connected with a drum shaft of the driving drum;

the extension platform is foldable and is arranged on one side of the base.

2. The integrated detection bench of claim 1, further comprising a dynamic braking unit disposed on the base and connected to the inverter motor, the dynamic braking unit being configured to apply braking to the inverter motor.

3. The integrated inspection gantry of claim 1, wherein the drum faces of the active and passive drums are recessed toward the respective axes, and the end faces of the active and passive drums are flush.

4. The comprehensive detection platform of claim 3, wherein the drum surfaces of the active drum and the passive drum are concave in the same radian, and the lowest part of the drum surface tops of the active drum and the passive drum is as high as the table top of the expansion platform and is positioned on the same horizontal plane.

5. The integrated inspection gantry of claim 3, wherein the heads of the active and passive drums are shot peened and have a minimum equivalent friction coefficient of not less than 0.5.

6. The integrated detection gantry of claim 1, wherein the expansion platform comprises:

7. The integrated test stand of claim 6, wherein the extension platform further comprises three fixing means disposed on the first, second and third flat plate frames, respectively, for fixing the first, second and third support legs, respectively.

8. The integrated test stand of claim 7, wherein said fixing means comprises an extension spring having one end fixed to one of said first, second or third plate frames and the other end fixed to the corresponding one of said first, second or third support legs.

9. The integrated test platform of claim 7, wherein said fixing means comprises an extension spring having one end fixed to one of said first, second or third plate frames and the other end fixed to the corresponding one of said first, second or third support legs; and anti-skid planks are fixedly arranged on the first flat plate frame, the second flat plate frame and the third flat plate frame respectively.

10. The integrated test platform of claim 6, wherein handles are fixedly attached to both sides of said base.