CN216050713U

CN216050713U - Test chassis for electric bicycle and test box with same

Info

Publication number: CN216050713U
Application number: CN202121694735.0U
Authority: CN
Inventors: 朱应陈; 李小利; 吴濛涛
Original assignee: Wuxi Inspection And Certification Institute
Current assignee: Wuxi Inspection And Certification Institute
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2022-03-15
Anticipated expiration: 2031-07-23

Abstract

The utility model relates to a test chassis for an electric bicycle and a test box with the same. The test chassis includes: a base plate; a front wheel fixing device positioned at a front portion of the base plate and configured to fix a front wheel of the electric bicycle; the rotating mechanism is positioned at the rear part of the bottom plate and is provided with a front roller and a rear roller which are rotatably fixed on the rear part, and a belt which can be abutted against a rear wheel of the electric bicycle is sleeved on the front roller and the rear roller; a load adjusting mechanism fixed to the rear portion and configured to be connectable with at least one of the front roller and the rear roller to adjust a load when the rear wheel rotates. The test chassis can be conveniently moved according to actual needs, and the labor cost of the test is effectively reduced. The utility model also provides a test box with the test chassis, so that the temperature and humidity of the test can be conveniently adjusted.

Description

Test chassis for electric bicycle and test box with same

Technical Field

The utility model relates to the technical field of electric bicycle detection, and particularly provides a test chassis for an electric bicycle and a test box with the same.

Background

An electric vehicle, also called an electric drive vehicle or an electric drive vehicle, is a vehicle that uses a battery (usually a storage battery) as a main energy source and converts electric energy into mechanical energy through a controller, a motor and other components. Electric vehicles can be classified into electric unicycles, electric bicycles, electric tricycles, electric quadricycles, and the like according to the number of tires. The electric two-wheeled vehicle is a general name of two-wheeled electric bicycles, electric motorcycles and electric light motorcycles. The electric bicycle is a two-wheeled electric bicycle which takes a vehicle-mounted battery as an auxiliary energy source, has the capacity of riding by feet and can realize the functions of electric power assistance or/and electric power driving. The electric bicycle is one of the most common electric bicycles, is simple to operate, flexible and portable, and brings great convenience to people's trip. In addition, the electric bicycle also has the advantages of energy conservation, environmental protection, high price and the like, so that the electric bicycle is favored by more and more users.

The national standard GB17661-2018 electric bicycle safety technical Specification enforces the multiple performance indexes of the electric bicycle, including the whole vehicle mass, the highest vehicle speed, the output voltage of the storage battery, the rated continuous output power of the motor and the like, and has great significance for improving the whole quality of the electric bicycle. In order to conveniently and quickly detect the performance of the whole electric bicycle, a performance testing device for an electric two-wheeled vehicle is developed in the prior art. For example, chinese patent application CN109782169A discloses a performance detection device for an electric two-wheeled vehicle. The detection device comprises a mechanical transmission system and a control sampling system. The mechanical transmission system comprises a synchronous toothed belt, a belt wheel, a front wheel roller, a rear wheel main roller and a rear wheel auxiliary roller. One end of the synchronous cog belt and the belt wheel is connected with the front wheel roller through a transmission shaft, the other end of the synchronous cog belt and the belt wheel is connected with the rear wheel main roller through a transmission shaft, and a rear wheel auxiliary roller is arranged on the rear side of the rear wheel main roller. The detection device can realize the function of detecting the parameters of the motor such as power, torque, efficiency and the like without disassembling the motor. However, when the testing device is used for testing, an inspector needs to drive a tested vehicle into the testing device and keep a riding state in the whole testing process, so that the labor cost of the test is greatly increased. In addition, the inspection device is bulky and needs to be fixed in a pit, and therefore, the inspection device cannot be flexibly moved according to actual needs. Further, the size of the checking device is relatively specified once the checking device is manufactured, and the checking device is poor in adaptability to electric bicycles with different specification sizes. Therefore, there is a possibility of improvement in the inspection device.

Accordingly, there is a need in the art for a new solution to the above problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, namely the technical problems that the electric bicycle testing device in the prior art is large in size, not easy to move and high in labor cost, the utility model provides the testing chassis for the electric bicycle. The test chassis includes: a base plate; a front wheel fixing device positioned at a front portion of the base plate and configured to fix a front wheel of the electric bicycle; the rotating mechanism is positioned at the rear part of the bottom plate and is provided with a front roller and a rear roller which are rotatably fixed on the rear part, and a belt which can be abutted against a rear wheel of the electric bicycle is sleeved on the front roller and the rear roller; a load adjusting mechanism fixed to the rear portion and configured to be connectable with at least one of the front roller and the rear roller to adjust a load when the rear wheel rotates.

As will be understood by those skilled in the art, the test chassis for electric bicycles of the present invention includes: the device comprises a bottom plate, a front wheel fixing device, a rotating mechanism and a load adjusting mechanism. The front wheel fixing device is positioned at the front part of the bottom plate, the rotating mechanism is positioned at the rear part of the bottom plate, and the load adjusting mechanism is fixed at the rear part of the bottom plate. Through the configuration, the front wheel fixing device, the rotating mechanism and the load adjusting mechanism are all organically integrated on the bottom plate, so that the test chassis disclosed by the utility model is compact in structure and small in size, and can be conveniently moved according to actual needs. In addition, the front wheel fixing device is configured to fix a front wheel of the electric bicycle, the rotating mechanism is provided with a front roller and a rear roller which are rotatably fixed at the rear part of the bottom plate, and a belt which can be abutted against a rear wheel of the electric bicycle is sleeved on the front roller and the rear roller, so that the electric bicycle to be tested can be conveniently fixed on the testing chassis of the utility model, and the belt in the rotating mechanism can conveniently interact with the rear wheel to rotate when the rear wheel rotates. Therefore, the whole test process does not need an inspector to ride the electric bicycle to be tested, and the labor cost of the test is obviously reduced. Further, the rotating mechanism is configured into the front roller, the rear roller and the belt which are matched with each other, so that the maintenance is convenient, and the replacement cost is reduced. Further, the load adjusting mechanism is configured to adjust the load when the rear wheel rotates, so that the load can be conveniently adjusted during testing to meet different requirements of tests. The load adjusting mechanism can be connected with at least one of the front roller and the rear roller, so that more abundant products can be obtained, and the structure can be modified appropriately to meet the test requirements of other electric two-wheeled vehicle products.

In the above-described preferred embodiment of the test chassis for an electric bicycle, the front wheel fixing device includes: a support table having a horizontal support plate parallel to the base plate and a plurality of vertical support plates spaced apart from each other formed between the horizontal support plate and the base plate; a clamping assembly disposed on the horizontal support plate and having a fixed clamping plate extending vertically and in a longitudinal direction from the horizontal support plate, movable clamping plates opposite to the fixed clamping plate and parallel to each other, and clamping members connected to the movable clamping plates, the clamping members being configured to drive the movable clamping plates to move toward the fixed clamping plates to clamp the front wheels. The support platform is configured to be provided with a horizontal support plate parallel to the bottom plate, so that the front wheel of the electric bicycle can be ensured to be approximately horizontally placed on the support platform, and the electric bicycle can be ensured to keep a relatively stable state in the test process. A plurality of vertical supporting plates which are spaced from each other are arranged between the horizontal supporting plate and the bottom plate, so that the rigidity and the strength of the supporting table can be enhanced, the overall weight of the supporting table can be effectively reduced, and the test chassis is convenient to move. In addition, the arrangement of the clamping assembly not only can conveniently clamp the front wheels with different thickness specifications, but also can effectively fasten the front wheels with different diameters through the matching between the fixed clamping plate and the movable clamping plate, thereby improving the adaptability of the testing chassis.

In the above-described preferred embodiment of the test chassis for an electric bicycle, the support base is configured to be adjustable in position on the bottom plate in the longitudinal direction. Through the configuration, different positions of the supporting platform on the bottom plate along the longitudinal direction can be conveniently adjusted, so that the testing chassis can clamp front wheels of electric bicycles with different lengths in the longitudinal direction, and the adaptability of the testing chassis is further improved.

In the above preferred technical solution for a test chassis of an electric bicycle, the rotating mechanism further includes a support bracket, and a first bearing seat and a second bearing seat which are matched and coaxial with the front roller, and a third bearing seat and a fourth bearing seat which are matched and coaxial with the rear roller are fixed on the support bracket. With the above configuration, it is possible to easily assemble the front and rear rollers and to allow the front and rear rollers to be rotatable with respect to the corresponding bearing housings, making the structure simpler.

In the above-described preferred embodiment of the test chassis for an electric bicycle, the support bracket includes a plurality of U-shaped support plates spaced apart from each other in a longitudinal direction, a first bearing bottom plate and a second bearing bottom plate extending in the longitudinal direction and opposing each other are formed on both vertical end portions of the U-shaped support plates, respectively, and the first bearing bottom plate is configured to receive the first bearing and the third bearing, and the second bearing bottom plate is configured to receive the second bearing and the fourth bearing. The supporting bracket is configured into a plurality of U-shaped supporting plates which are spaced from each other along the longitudinal direction, so that the rigidity and the strength of the supporting bracket can be enhanced, the overall weight of the supporting bracket can be effectively reduced, and the test chassis provided by the utility model can be conveniently moved. In addition, the bearing seats matched with the front roller and the rear roller are respectively fixed on the corresponding bearing seat bottom plates, so that the bearing seats can be conveniently fixed, the structure is firmer, and the maintenance and the replacement are convenient.

In the above preferred technical solution of the test chassis for the electric bicycle, the test chassis further includes a detection mechanism including a torque test device positioned between the rotating mechanism and the load adjusting mechanism. The torque testing device is arranged on the testing chassis, so that various parameters of the electric bicycle, such as torque, rotating speed, power and the like, can be conveniently tested. In addition, the torque testing device is positioned between the rotating mechanism and the load adjusting mechanism, so that the structure of the testing chassis is more compact, the size is reduced, and the testing chassis is convenient to move.

In the above preferred embodiment of the test chassis for an electric bicycle, the torque testing device has a center shaft having a first end connected to the rear roller or the front roller and a second end connected to the output shaft of the load adjusting mechanism. Through the arrangement, the rear roller or the front roller, the central shaft of the detection mechanism and the output shaft of the load adjusting mechanism can be ensured to be positioned on the same central axis.

In the above preferred embodiment of the test chassis for an electric bicycle, the first end is configured to be connected to the rear roller or the front roller through a first coupling, and the second end is configured to be connected to the output shaft through a second coupling. The first coupling is arranged between the first end and the rear roller or the front roller, and the second coupling is arranged between the second end and the output shaft of the load adjusting mechanism, so that all parts can be effectively fixed, the disassembly, the maintenance and the overhaul are convenient, the overload protection effect can be realized, and the test chassis is safer and more stable.

In the above preferred embodiment of the test chassis for an electric bicycle, the detection mechanism further includes a current detection device positioned on the bottom plate to detect an output current of the electric bicycle. Through the configuration of the current detection device capable of detecting the output current of the electric bicycle, the output current of the electric bicycle can be conveniently detected, so that more comprehensive test parameters can be obtained.

In order to solve the problems in the prior art, namely the technical problems that the electric bicycle testing device is not easy to move and labor cost is high in the prior art, the utility model also provides a test box. The test chamber comprises: a box body; a temperature and humidity adjusting device configured to adjust a temperature and a humidity in the box body; and a test chassis for an electric bicycle according to any one of the above, and the test chassis is removably arranged in the case. By using the test chassis for electric bicycles of any one of the above, the test chassis can be easily moved into the test chamber of the present invention, and the test chassis can be removed from the test chamber after the test is completed, so that other suitable tests can be performed in the test chamber without being affected. In addition, the temperature and the humidity in the box body of the test box can be conveniently adjusted through the temperature and humidity adjusting device, so that the requirements of different test environments are met.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of an embodiment of a test chassis for an electric bicycle of the present invention;

FIG. 2 is a top plan view of an embodiment of the test chassis for an electric bicycle of the present invention;

fig. 3 is a schematic cross-sectional view of an embodiment of the test chassis for electric bicycles of the present invention, taken along the line a-a shown in fig. 2.

List of reference numerals:

1. testing the chassis; 11. a base plate; 111. a front portion; 1111. mounting holes; 112. a rear portion; 12. a front wheel fixing device; 121. a support table; 1211. a vertical support plate; 1211a, a first vertical support plate; 1211b, a second vertical support plate; 1211c, a third vertical support plate; 1211d, a fourth vertical support plate; 1212. a horizontal support plate; 122. a clamping assembly; 1221. fixing the clamping plate; 1222. a movable clamping plate; 1223. a clamping member; 13. a rotating mechanism; 131. a support bracket; 1311. a U-shaped support plate; 1311a, a first vertical end; 1311b, a second vertical end; 1312. a first bearing mount base plate; 1313. a second bearing housing bottom plate; 132. a front roller; 133. a first bearing housing; 134. a second bearing housing; 135. a rear roller; 136. a third bearing seat; 137. a fourth bearing seat; 138. a belt; 14. a detection mechanism; 141. a torque testing device; 1411. a central shaft; 1411a, a first end; 1411b, a second end; 142. a support pillar; 143. a fifth bearing seat; 144. a sixth bearing housing; 145. a current testing device; 15. a load adjusting mechanism; 151. a body; 1511. an output shaft; 152. a supporting seat; 16. a first coupling; 17. a second coupling.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In order to solve the technical problems that an electric bicycle testing device in the prior art is large in size, not easy to move and high in labor cost, the utility model provides a testing chassis 1 for an electric bicycle. The test chassis 1 comprises: a base plate 11; a front wheel fixing device 12, the front wheel fixing device 12 being positioned at a front portion 111 of the base plate 11 and configured to fix a front wheel of the electric bicycle; a rotating mechanism 13, the rotating mechanism 13 is positioned at the rear part 112 of the bottom plate 11 and is provided with a front roller 132 and a rear roller 135 which are rotatably fixed on the rear part 112, and a belt 138 which can be abutted against the rear wheel of the electric bicycle is sleeved on the front roller 132 and the rear roller 135; a load adjusting mechanism 15, the load adjusting mechanism 15 being fixed to the rear portion 112 and configured to be connectable with at least one of the front roller 132 and the rear roller 135 to adjust a load when the rear wheel rotates. Through the configuration, the testing chassis 1 is compact in structure, can be conveniently moved according to actual needs, and does not need an inspector to ride the electric bicycle to be tested in the testing process, so that the testing labor cost is remarkably reduced.

FIG. 1 is a schematic structural view of an embodiment of a test chassis for an electric bicycle of the present invention; FIG. 2 is a top plan view of an embodiment of the test chassis for an electric bicycle of the present invention;

In this context, unless explicitly stated to the contrary, the term "longitudinal direction" refers to a direction extending left and right along the paper based on the orientation shown in fig. 2; the term "lateral direction" refers to a direction extending up and down the plane of the paper based on the orientation shown in fig. 2.

The specific structure of the test chassis 1 of the present invention will be described in detail with reference to fig. 1 to 3. It should be noted that the test chassis 1 of the present invention is applicable not only to electric bicycles, but also to electric motorcycles, electric scooters and other suitable vehicles.

As shown in fig. 1 and 2, in one or more embodiments, the test chassis 1 of the present disclosure includes a base plate 11, a front wheel fixture 12, a rotation mechanism 13, a detection mechanism 14, and a load adjustment mechanism 15.

As shown in fig. 1 and 2, in one or more embodiments, the base plate 11 is a generally square, one-piece plate-like structure. Alternatively, the bottom plate 11 may be trapezoidal, circular, or other suitable shape. Alternatively, the bottom plate 11 may be formed by splicing three parts, a front plate, an intermediate connecting plate, and a rear plate. The base plate 11 may be made of a suitable stainless steel plate to enhance the strength of the base plate 11 and prolong the service life of the test chassis 1. Alternatively, the bottom plate 11 may be made of aluminum alloy or other suitable materials to reduce the weight of the bottom plate 11 for easy movement. The base plate 11 has opposite front 111 and rear 112 portions. Based on the orientation shown in FIG. 1, the front portion 111 is located on the left side of the floor 11 and the rear portion 112 is located on the right side of the floor 11. In one or more embodiments, a plurality of mounting holes 1111 are provided on the front portion 111 to removably secure the front wheel securing device 12.

As shown in fig. 1 and 2, the front wheel fixture 12 is positioned at the front 111 of the floor 11. In one or more embodiments, the front wheel securing device 12 includes a support table 121 and a clamping assembly 122. In one or more embodiments, support table 121 includes a horizontal support plate 1212 and a vertical support plate 1211 formed between horizontal support plate 1212 and bottom plate 11. The horizontal support plate 1212 and the vertical support plate 1211 are formed of a suitable material such as stainless steel to ensure the rigidity and strength of the supporting table 121. The horizontal support plate 1212 and the vertical support plate 1211 are detachably fixed by screws, bolts or other suitable fixing methods. Alternatively, the horizontal support plate 1212 may be integrally connected by welding or the like. In one or more embodiments, the horizontal support plate 1212 is configured to be parallel to the bottom plate 11 to ensure that the front wheel of the electric bicycle (not shown) is substantially horizontally disposed on the support table 121 to ensure that the electric bicycle maintains a relatively stable state during the testing process. As shown in fig. 1, in one or more embodiments, the vertical support plates 1211 include a first vertical support plate 1211a, a second vertical support plate 1211b, a third vertical support plate 1211c, and a fourth vertical support plate 1211d that are uniformly spaced apart in the lateral direction. Based on the orientation shown in fig. 1, each of the vertical support plates 1211 is configured as a plate-like structure extending vertically upward from the bottom plate 11 and in the longitudinal direction. The vertical support plate 1211 is disposed to enhance the rigidity and strength of the support table 121 to support the electric bicycle to be tested, and to effectively reduce the overall weight of the support table 121, thereby facilitating the movement of the test chassis 1. Alternatively, each of the vertical support plates 1211 may be provided in a plate-like structure extending vertically upward from the bottom plate 11 and in a lateral direction. Further, each of the vertical support plates 1211 may also be provided in a wave shape, a zigzag shape, or other suitable shapes. Further, the number of the vertical support plates 1211 may be set to other suitable numbers more or less than 4. The arrangement of the vertical support plates 1211 may be set in other suitable manners as long as it can support the weight of the horizontal support plate 1212 and the electric bicycle to be tested. In one or more embodiments, each vertical support plate 1211 is configured to be matched with the mounting hole 1111 of the bottom plate 11 through a screw (not shown in the figures), so that the support table 121 can be not only firmly fixed on the bottom plate 11, but also the position of the support table 121 on the bottom plate 11 along the longitudinal direction can be adjusted according to actual needs, so that the test chassis 1 of the present invention can meet the test requirements of electric bicycles with different longitudinal dimensions, and the adaptability of the test chassis 1 of the present invention is improved.

As shown in fig. 1 and 2, in one or more embodiments, the clamping assembly 122 is positioned away from the rear portion 112 of the horizontal support plate 1212 to shorten the longitudinal length of the test chassis 1 of the present invention. In one or more embodiments, the clamping assembly 122 includes a fixed clamping plate 1221, a movable clamping plate 1222, and a clamping member 1223. The fixed clamping plate 1221 and the movable clamping plate 1222 may be made of a suitable material such as stainless steel, etc. to enhance the rigidity and strength of the fixed clamping plate 1221 and the movable clamping plate 1222 and prolong the service life. Alternatively, the opposite side walls of the fixed clamping plate 1221 and the movable clamping plate 1222 may be further coated with a buffer material such as rubber to more firmly clamp the front wheel of the electric bicycle. Based on the orientation shown in fig. 1, in one or more embodiments, the fixed clamping plate 1221 is configured as a plate-like structure extending vertically upward and in a longitudinal direction from the horizontal support plate 1212. The stationary clamping plate 1221 is configured to be fixed to the horizontal support plate 1212. The fixing method includes, but is not limited to, screw fixing, bolt fixing, welding fixing, and the like. In one or more embodiments, the movable clamping plate 1222 is configured as a plate-like structure opposite to and parallel to the fixed clamping plate 1221 so as to cooperate with each other to clamp the front wheel of the electric bicycle to be tested. In one or more embodiments, after the front wheel of the electric bicycle to be tested is clamped by the fixed clamping plate 1221 and the movable clamping plate 1222, the front wheel is fastened again with the fixed clamping plate 1221 and the movable clamping plate 1222 by a fastening rope (not shown in the figure) to enhance the fastening degree, so as to prevent the front wheel from being displaced from or even falling off from the fixed clamping plate 1221 and the movable clamping plate 1222. In one or more embodiments, the movable clamping plate 1222 is configured to be coupled to the clamping member 1223 on a side away from the fixed clamping plate 1221. The clamping member 1223 may be a hydraulic rod, a pneumatic rod, or other suitable member. The fastening means between the clamping member 1223 and the horizontal support plate 1212 includes, but is not limited to, screw fastening, bolt fastening, etc. With the above-described configuration, the movable clamping plate 1222 can be not only conveniently moved toward the fixed clamping plate 1221 to clamp the front wheels by the driving of the clamping member 1223, but also effectively fix the front wheels of different diameters (and thus different thicknesses), further improving the adaptability of the test chassis 1 of the present invention.

In one or more embodiments, as shown in fig. 1 and 2, a rotation mechanism 13 is provided on the rear portion 112 of the base plate 11. The rotating mechanism 13 includes a support bracket 131, a front roller 132, a rear roller 135, and a belt 138. As shown in FIG. 1, in one or more embodiments, support bracket 131 includes 4U-shaped support plates 1311 evenly spaced in the longitudinal direction and first bearing mount floor 1312 and second bearing mount floor 1313 formed on U-shaped support plates 1311. The U-shaped support plate 1311 may be made of a suitable material such as stainless steel. Preferably, each of the U-shaped support plates 1311 is configured in the same structure, so that the structure is simpler and easier to manufacture. Based on the orientation shown in fig. 1, each U-shaped support plate 1311 is configured to extend vertically upward and in a lateral direction from the bottom plate 11. The fixing manner of the U-shaped supporting plate 1311 and the bottom plate 11 includes, but is not limited to, screw fixing, bolt fixing, welding fixing, and the like. Alternatively, the number of the U-shaped support plates 1311 may be set to other suitable numbers more or less than 4, such as 3, 5, etc. As shown in fig. 1, each U-shaped support plate 1311 has a first vertical end 1311a and a second vertical end 1311b opposite to each other. A first bearing floor 1312 extending substantially in the longitudinal direction is formed on the first vertical end 1311a, and a second bearing floor 1313 extending substantially in the longitudinal direction is formed on the second vertical end 1311 b. First bearing mount base plate 1312 and second bearing mount base plate 1313 may be fabricated from a suitable material such as stainless steel. The first bearing base plate 1312 and the second bearing base plate 1313 may be fixed to the U-shaped support plate 1311 by screws, bolts, welding, or other suitable fixing means.

As shown in FIG. 1, in one or more embodiments, first bearing block 133 and third bearing block 136 are secured to first bearing block floor 1312, and second bearing block 134 (shown in FIG. 2) and fourth bearing block 137 are secured to second bearing block floor 1313. Preferably, first bearing housing 133, second bearing housing 134, third bearing housing 136, and fourth bearing housing 137 are configured in the same structure, so that the structure is simpler, the manufacturing is easy, and the repair and replacement are also convenient. Each bearing seat is made of stainless steel so as to enhance the rigidity and strength of the bearing seat and prolong the service life of the bearing seat. The fixing mode of each bearing seat and the corresponding bearing seat bottom plate includes but is not limited to screw fixing, bolt fixing and the like.

As shown in FIG. 1, in one or more embodiments, front roller 132 is configured to be rotatably secured between first bearing housing 133 and second bearing housing 134 (shown in FIG. 2), and rear roller 135 is configured to be rotatably secured between third bearing housing 136 and fourth bearing housing 137. The front roller 132 and the rear roller 135 are formed of a suitable material such as stainless steel or aluminum alloy. Preferably, the front roller 132 and the rear roller 135 are configured in the same structure in order to simplify the manufacturing process. In one or more embodiments, a belt 138 is also nested between front roller 132 and back roller 135. The belt 138 may be made of a suitable material such as PVC or PU. The belt 138 is configured to abut against the rear wheel of the electric bicycle to be tested such that rotation of the rear wheel of the electric bicycle causes the belt 138 to rotate, thereby causing the front roller 132 and the rear roller 135 to rotate. The arrangement of the belt 138 can better simulate the actual friction condition between the electric bicycle and the ground, improve the testing precision, and facilitate the disassembly, assembly and replacement, so as to prolong the service life of the testing chassis 1.

As shown in FIGS. 1 and 2, in one or more embodiments, the sensing mechanism 14 includes a torque testing device 141 coupled to the rear roller 135. Alternatively, the torque testing device 141 may also be configured to be connected to the front roller 132. The torque testing device 141 is positioned at the rear portion 112 of the base plate 11 and is configured to be secured to the rear portion 112 by 4 support posts 142 located at the 4 corners forming a square or rectangle. Based on the orientation shown in fig. 1, each support column 142 is configured as a columnar structure extending vertically upward from the base plate 11. Preferably, each support post 142 is configured in the same configuration to simplify the manufacturing process. The support posts 142 may be formed of stainless steel, aluminum alloy, or other suitable materials. A fifth bearing housing 143 is fixed to the two support columns 142 near the rear roller 135 and a sixth bearing housing 144 is fixed to the two support columns 142 remote from the rear roller 135. Preferably, fifth bearing housing 143 and sixth bearing housing 144 are configured to have the same structure and material as first bearing housing 133, second bearing housing 134, third bearing housing 136, and fourth bearing housing 137, so as to simplify the manufacturing process and facilitate machining. The fixing manner of the fifth bearing seat 143 and the sixth bearing seat 144 to the supporting column 142 includes, but is not limited to, screw fixing, bolt fixing, and the like. In one or more embodiments, the torque testing device 141 is a dynamic torque tester. Alternatively, the torque testing device 141 is a digital readout torque tester or other suitable torque testing device. Through the torque testing device 141, parameters such as torque, rotating speed, power and the like can be conveniently detected. As shown in fig. 3, the torque testing device 141 has a central axis 1411. As shown in fig. 1-3, the central shaft 1411 has opposing first and

second ends

1411a, 1411 b. First end 1411a extends through fifth bearing seat 143 and second end 1411b extends through sixth bearing seat 144 such that central shaft 1411 is rotatably secured to fifth bearing seat 143 and sixth bearing seat 144. In one or more embodiments, first end 1411a is coupled to rear roller 135 via a first coupling 16 and second end 1411b is coupled to load adjustment mechanism 15 via a second coupling 17. With the above arrangement, the center shaft 1411 can be effectively fixed together with the rear roller 135 and the load adjusting mechanism 15. Further, the coupler can be convenient to disassemble, assemble, maintain and overhaul. Furthermore, the arrangement of the coupler can also play a role in overload protection, so that the test chassis 1 is safer and more stable.

As shown in fig. 1 and 2, in one or more embodiments, the detection mechanism 14 further includes a current testing device 145. The current testing device 145 may be an ammeter, a road tester, or other suitable device. In testing, the current testing device 145 may be connected between a battery (not shown) of the electric bicycle to be tested and a controller (not shown) so as to conveniently test the output current of the electric bicycle to obtain more comprehensive testing parameters. In one or more embodiments, as shown in fig. 1 and 2, the current testing device 145 is configured to be secured to the base plate 11. Alternatively, the current testing device 145 may be fixed to the horizontal support plate 1212. Further, the current testing device 145 may also be free from the test chassis 1, i.e., independent from the test chassis 1.

As shown in fig. 1 and 2, in one or more embodiments, the load adjustment mechanism 15 is positioned at a rear portion 112 of the base plate 11. The load adjuster mechanism 15 includes a body 151 and a support base 152. The support base 152 is fixed to the base plate 11 by screw fixing, bolt fixing or other suitable fixing means. The support base 152 is made of a suitable material such as stainless steel to enhance its rigidity and strength. The body 151 is fixed to the support base 152. The fixing means includes, but is not limited to, screw fixing, bolt fixing, etc. In one or more embodiments, the body 151 is a magnetic particle brake to precisely adjust the load when the rear wheel of the electric bicycle to be tested is rotated. Alternatively, the body 151 may be configured as other suitable load adjustment devices. As shown in fig. 3, the body 151 has an output shaft 1511. The output shaft 1511 is connected to the second end 1411b of the center shaft 1411 by the second coupling 17 so that the output shaft 1511 can be located on the same center axis C as the center shaft 1411 and the rear roller 135. Alternatively, the load adjuster mechanism 15 is configured to be connected to the front roller 132. Specifically, the output shaft 1511 of the load adjusting mechanism 15 is configured to be connected to the front roller 132 through a coupling so as to adjust the load when the rear wheel rotates. Further, the load adjusting mechanisms 15 are provided in two and connected to the front roller 132 and the rear roller 135, respectively, as long as the accuracy of the load adjusting mechanisms 15 can be ensured so that the front roller 132 and the rear roller 135 rotate at the same speed.

In order to solve the technical problems of large size, difficulty in moving and high labor cost of the electric bicycle testing device in the prior art, the utility model also provides a test box (not shown in the figure). The test chamber comprises a chamber body, a temperature and humidity adjusting device and the test chassis 1 of any one of the above embodiments. The box is configured to receive a test chassis 1 and an electric bicycle to be tested. The temperature and humidity adjusting device is configured to adjust the temperature and humidity in the box body so as to meet the requirements of different test environments. Preferably, the test chassis 1 is configured to be removably secured within the housing so as to adjust the position of the test chassis 1 as needed. It can be understood that, because all the components in the testing chassis 1 are organically integrated on the bottom plate 11, the testing chassis 1 has a compact structure, a small volume and a light weight, and therefore, the testing chassis 1 can be conveniently placed in a box body and the position of the testing chassis in the box body can be adjusted. Correspondingly, the whole space of the test box is relatively small, so that the temperature and the humidity in the box body can be adjusted more easily. In addition, because the testing chassis 1 can conveniently fix the front wheel of the electric bicycle to be tested, an inspector does not need to ride the electric bicycle in the whole testing process, and the labor cost of the test can also be obviously reduced.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the utility model, and the technical scheme after the changes or substitutions can fall into the protection scope of the utility model.

Claims

1. A test chassis for an electric bicycle, the test chassis comprising:

a base plate;

a front wheel fixing device positioned at a front portion of the base plate and configured to fix a front wheel of the electric bicycle;

the rotating mechanism is positioned at the rear part of the bottom plate and is provided with a front roller and a rear roller which are rotatably fixed on the rear part, and a belt which can be abutted against a rear wheel of the electric bicycle is sleeved on the front roller and the rear roller;

a load adjusting mechanism fixed to the rear portion and configured to be connectable with at least one of the front roller and the rear roller to adjust a load when the rear wheel rotates.

2. The test chassis for electric bicycles of claim 1, wherein the front wheel fixing device comprises:

a support table having a horizontal support plate parallel to the base plate and a plurality of vertical support plates spaced apart from each other formed between the horizontal support plate and the base plate;

a clamping assembly disposed on the horizontal support plate and having a fixed clamping plate extending vertically and in a longitudinal direction from the horizontal support plate, movable clamping plates opposite to the fixed clamping plate and parallel to each other, and clamping members connected to the movable clamping plates, the clamping members being configured to drive the movable clamping plates to move toward the fixed clamping plates to clamp the front wheels.

3. A test chassis for an electric bicycle according to claim 2, wherein the support table is configured to be adjustable in position on the base plate in the longitudinal direction.

4. The test chassis for electric bicycles, according to claim 1, wherein said rotation mechanism further comprises a support bracket on which are fixed a first bearing housing and a second bearing housing matching and coaxial with said front roller, and a third bearing housing and a fourth bearing housing matching and coaxial with said rear roller.

5. The test chassis for an electric bicycle according to claim 4, wherein the support bracket includes a plurality of U-shaped support plates spaced apart from each other in a longitudinal direction, a first bearing bottom plate and a second bearing bottom plate extending in the longitudinal direction and opposing each other are formed on both vertical end portions of the U-shaped support plates, respectively, and the first bearing bottom plate is configured to receive the first bearing and the third bearing, and the second bearing bottom plate is configured to receive the second bearing and the fourth bearing.

6. The test chassis for an electric bicycle of claim 1, further comprising a detection mechanism including a torque testing device positioned between the rotation mechanism and the load adjustment mechanism.

7. The test chassis for an electric bicycle of claim 6, wherein the torque testing device has a central shaft having a first end connected to the rear roller or the front roller and a second end connected to an output shaft of the load adjustment mechanism.

8. The test chassis for an electric bicycle of claim 7, wherein the first end is configured to be coupled to the rear roller or the front roller via a first coupling, and the second end is configured to be coupled to the output shaft via a second coupling.

9. The test chassis for electric bicycles of claim 6, wherein the detection mechanism further comprises a current detection device positioned on the bottom plate to detect an output current of the electric bicycle.

10. A test chamber, comprising:

a box body;

a temperature and humidity adjusting device configured to adjust a temperature and a humidity in the box body; and

a test chassis for an electric bicycle according to any one of claims 1-9, and removably arranged within the box.