A detection device integrating weighing and speed measurement for an electric bicycle

Abstract

The present application relates to electric bicycle detection technical field, specifically to a kind of electric bicycle weighing speed integration detection device, including weighing platform, bottom plate is equipped in the weighing platform lower, several evenly distributed weighing units are equipped between the weighing platform and the bottom plate, for the whole vehicle weighing of detection electric car;Speed measuring assembly is further equipped on the weighing platform, for the speed of electric car is detected, speed measuring groove is opened in the weighing platform, the speed measuring assembly is connected in the speed measuring groove in the weighing platform inside;Separation mechanism that the speed measuring assembly can be separated from the speed measuring groove is equipped in the bottom plate.The present application installs speed measuring assembly in the weighing platform inside, makes weighing structure and speed measuring structure be integrated, avoid repeatedly moving electric car, simplify detection procedure, weighing structure and speed measuring structure are integrated together, so that the integration degree of entire detection device is higher, occupies small space, it is convenient for on-site law enforcement deployment and fast screening overproof electric car.

Description

Technical Field

[0001] This invention relates to the field of electric bicycle testing technology, specifically to an integrated testing device for weighing and measuring the speed of electric bicycles. Background Technology

[0002] With the rapid increase in the number of electric bicycles, the traffic safety hazards caused by non-compliant electric bicycles (overweight, speeding) are becoming increasingly prominent. Law enforcement agencies will investigate and rectify electric bicycles that do not meet the new national standards. The standard for defining non-compliant electric bicycles is usually to test the weight of the whole vehicle and measure the maximum speed of the electric bicycle. That is, according to the new national standards, if the maximum speed of the electric bicycle exceeds 25 km / h and the weight exceeds 55 kg, it is judged as a non-compliant electric bicycle.

[0003] The existing equipment used by law enforcement agencies to detect electric vehicles exceeding emission standards mainly falls into two categories: one is a standalone weighbridge, which is carried to the site with the law enforcement vehicle to weigh the entire electric vehicle; the other is a handheld or standalone speedometer used to measure the maximum speed of the electric vehicle. These two main detection devices are separate in use, have limited functions, and require the electric vehicle to be moved to different locations sequentially during testing, making the process rather cumbersome.

[0004] An existing invention patent with publication number CN208672317U discloses an electric bicycle speed and weight measurement device. This device, intended to assist traffic police enforcement, collects information on suspected violations by electric bicycles on the road. It measures the actual speed, weight, and wheelbase of the electric bicycle and compares the measured values ​​with pre-entered detection standards to determine if a violation has occurred. It also has a printing function, allowing the printing of test results as a penalty receipt for both the penalized individual and law enforcement. While this patent combines weighing and speed measurement functions, its speed measurement device, like existing technologies, is an external structure, essentially independent of the weighing platform. This results in low integration, large space requirements, and inconvenience for on-site enforcement deployment. Furthermore, because the speed measurement device is directly fixed to the weighing platform, the vibrations generated during measurement are entirely transferred to the platform. Over time, this vibration can affect or even damage the weighing sensor on the platform, thus impacting its measurement accuracy. Summary of the Invention

[0005] The purpose of this invention is to provide an integrated weighing and speed measuring device for electric bicycles, in order to solve the problems mentioned in the background art regarding the limited functionality and low integration of the speed measuring device and the weighing platform in existing electric bicycle over-limit detection devices.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an integrated weighing and speed measuring device for electric bicycles, comprising a weighing platform, a base plate below the weighing platform, and a plurality of evenly distributed weighing units between the weighing platform and the base plate, for weighing the electric bicycle being tested. The weighing platform is also equipped with a speed measuring component for detecting the speed of the electric vehicle. The weighing platform has a speed measuring slot, and the speed measuring component is connected in the speed measuring slot and located inside the weighing platform. The base plate is provided with a separation mechanism that can separate the speed measuring component from the speed measuring slot. When measuring speed, the separation mechanism can separate the speed measuring component from the speed measuring slot to achieve independent speed measurement.

[0007] Preferably, the speed measuring component includes a speed measuring roller and roller connecting plates connected to both ends of the speed measuring roller. The roller connecting plates are provided with bearing seats inside and are connected to the shaft of the speed measuring roller. The roller connecting plates at both ends are connected to the speed measuring groove.

[0008] Preferably, the speed measuring groove is a vertically continuous groove, with a placement groove at both top ends and a sliding groove on both inner walls. There are at least two placement grooves and two sliding grooves on each side of the speed measuring groove. One end of the placement groove extends outward from the speed measuring groove, and the other end is open and flush with the inner wall of the speed measuring groove. The sliding groove is a structure that extends from the inner wall of the speed measuring groove inward and is vertically continuous. Both ends of the roller connecting plate are provided with a stacking block on the upper side of the outer side wall and a sliding block on the lower side of the outer side wall. The structure of the stacking block and the sliding block are respectively matched with the stacking groove and the sliding groove structure, so that the roller connecting plate can be connected to the speed measuring groove.

[0009] Preferably, the base plate is provided with a base plate groove corresponding to the speed measuring groove in the weighing platform. The base plate groove has a hollow structure with an open top and a closed bottom. The separation mechanism is located in the hollow cavity of the base plate groove. The separation mechanism includes a cylinder connected to the bottom of the base plate groove, a push plate connected to the output end of the cylinder, and several push columns on the upper surface of the push plate.

[0010] Preferably, both sides of the bottom of the speed measuring groove are provided with support plates to support the bottom of the roller connecting plate, and the length and width dimensions of the support plates are the same as those of the roller connecting plate. Both sides of the stacking plate are provided with ejector holes that extend vertically. The position and number of ejector holes correspond to the position and number of push columns on the upper surface of the push plate, and the diameter of the ejector holes is larger than the diameter of the push columns. The bottom surface of the roller connecting plate is provided with slots that correspond to the position and number of push columns and match the structure. The slots extend inward and upward along the bottom surface of the roller connecting plate. The push columns can pass through the ejector holes and be inserted into the slots on the bottom surface of the roller connecting plate to lift the roller connecting plate.

[0011] Preferably, the heights of the stacking groove, the sliding groove, the stacking block, and the sliding block are all equal to L1. When the cylinder is in its initial state, the distance from the top surface of the pushing column to the top surface of the slot inside the roller connecting plate is L2, the height of the speed measuring groove is L3, and the stroke of the cylinder is L4, satisfying L2 + L3 > L4 > L1 + L2.

[0012] Preferably, the inner walls on both sides of the bottom plate groove are provided with a plurality of limiting grooves, and the push plate is provided with protruding posts on both sides that are inserted into the limiting grooves and can slide within the limiting grooves.

[0013] Preferably, the bottom surface of the push plate is hinged with an adjusting rod, and the top of the cylinder is provided with a switch bolt guide rod connected to the internal switch bolt. When the adjusting rod rotates downward through the hinge, its end can touch the switch bolt guide rod to control the cylinder drive.

[0014] Preferably, the other end of the adjusting rod passes through the groove in the base plate and is located inside the base plate, and a pressure rod is hinged to the end. The base plate has a slot inside for the adjusting rod and the pressure rod to move, and a strip groove for accommodating the pressure rod is opened on the side of the base plate.

[0015] Preferably, one end of the weighing platform and the base plate is also provided with a ramp, and the output ends of the weighing unit and the speed measuring roller are electrically connected to a display instrument for displaying weight and speed values.

[0016] Compared with the prior art, the beneficial effects of the present invention are: (1) The integrated weighing and speed measuring device for electric bicycles integrates the weighing and speed measuring components by installing the speed measuring components inside the weighing platform, thus making the weighing structure and speed measuring structure one unit. When detecting electric bicycles that exceed the standard, the weight and speed can be measured at one time, avoiding repeated movement of the electric bicycle and simplifying the detection process. The integration of the weighing structure and the speed measuring structure makes the entire detection device more integrated, occupies less space, and is convenient for on-site law enforcement deployment and rapid screening of electric bicycles that exceed the standard.

[0017] (2) The electric bicycle weighing and speed measuring integrated detection device is equipped with a separation mechanism. When the electric bicycle is measured by the speed measuring roller, the speed measuring roller and the roller connecting plate can be temporarily disconnected from the weighing platform through the separation mechanism. Through mechanical decoupling, the vibration generated when the speed measuring roller rotates is not directly applied to the weighing platform, thus affecting the measurement accuracy of the weighing sensor. At the same time, the separation mechanism is set inside the base plate, so that the whole device has almost no external structure, has a high degree of integration, and is easy to deploy and use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of an integrated weighing and speed measuring device for electric bicycles according to the present invention. Figure 2 This is a schematic diagram of the base plate and the side structure of the weighing platform of the integrated weighing and speed measuring device for electric bicycles according to the present invention. Figure 3 This is a schematic diagram of the speed measuring roller and roller connecting plate structure of the integrated weighing and speed measuring device for electric bicycles according to the present invention. Figure 4 This is a schematic diagram of the internal speed measuring groove structure of the weighing platform of the integrated weighing and speed measuring device for electric bicycles according to the present invention. Figure 5 This invention relates to an integrated weighing and speed measuring device for electric bicycles. Figure 4 A cross-sectional view of section AA in the middle; Figure 6 This is a schematic diagram of the bottom plate groove structure in the bottom plate of the integrated weighing and speed measuring detection device for electric bicycles according to the present invention. Figure 7 This is a schematic cross-sectional view of the bottom plate groove of the integrated weighing and speed measuring device for electric bicycles according to the present invention. Figure 8 This is a schematic diagram of the internal separation mechanism of the bottom plate groove of the integrated weighing and speed measuring device for electric bicycles according to the present invention. Figure 9 This is a schematic diagram of the connection structure of the pressure rod and adjusting rod of the integrated weighing and speed measuring device for electric bicycles according to the present invention; Figure 10 This is a schematic diagram of the connection between the separation roller connecting plate and the weighing platform of the separation mechanism of the integrated weighing and speed measuring device for electric bicycles according to the present invention.

[0019] In the diagram: 1. Base plate; 2. Weighing platform; 3. Speed ​​measuring roller; 4. Speed ​​measuring groove; 401. Laying groove; 402. Laying plate; 403. Sliding groove; 404. Top hole; 5. Inclined plate; 6. Weighing unit; 7. Roller connecting plate; 701. Laying block; 702. Sliding block; 8. Base plate groove; 801. Limiting groove; 9. Push plate; 10. Pushing column; 11. Cylinder; 12. Adjusting rod; 13. Pressure rod; 14. Speed ​​measuring component; 15. Separation mechanism. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-10 The present invention provides a technical solution: an integrated weighing and speed measuring detection device for electric bicycles, including a weighing platform 2, a base plate 1 below the weighing platform 2, and a plurality of evenly distributed weighing units 6 between the weighing platform 2 and the base plate 1 for weighing the electric bicycle. In this embodiment, the weighing units 6 are pressure weighing sensors, and 4-8 are evenly distributed below the weighing platform 2.

[0022] The weighing platform 2 is also equipped with a speed measuring component 14 for detecting the speed of the electric vehicle. The weighing platform 2 has a speed measuring slot 4, and the speed measuring component 14 is connected in the speed measuring slot 4 and located inside the weighing platform 2. Specifically, the speed measuring component 14 includes a speed measuring roller 3 and roller connecting plates 7 connected to both ends of the speed measuring roller 3. The roller connecting plates 7 have bearing seats inside and are connected to the shaft of the speed measuring roller 3. The roller connecting plates 7 at both ends are connected to the speed measuring groove 4. The speed measuring roller 3 consists of two parallel rollers. The shafts at both ends of the rollers are connected to the bearing seats inside the roller connecting plates 7, thus connecting to the roller connecting plates 7. The shaft end of one of the rollers extends to the outside of the bearing seat and is connected to a speed acquisition component. The speed acquisition component acquires the speed signal of the electric vehicle wheel. In this embodiment, the speed acquisition component is a mechanical speed encoder. Its input end is connected to the shaft end of the roller, and its output end is electrically connected to a display instrument for displaying speed information. The speed measuring roller 3 is set in the speed measuring groove 4 in the weighing platform 2 through the roller connecting plates 7, so that the speed measuring component 14 is located inside the weighing platform 2, avoiding the external speed measuring structure, making the integration of the entire device higher and occupying less space.

[0023] In this embodiment, the speed measuring groove 4 is a vertically continuous groove, with a stacking groove 401 at both top ends and a sliding groove 403 on both inner walls. At least two stacking grooves 401 and two sliding grooves 403 are provided on each side of the speed measuring groove 4. One end of the stacking groove 401 extends outward from the speed measuring groove 4, while the other end is open and flush with the inner wall of the speed measuring groove 4. The stacking groove 401 is opened along the top inner wall of the speed measuring groove 4 towards the weighing platform 2, with its top and the end located on the inner wall of the speed measuring groove 4 being open structures. The sliding groove 403 is a structure that extends vertically from the inner wall of the speed measuring groove 4 inwards and is composed of two protrusions on the inner wall of the speed measuring groove 4, forming a sliding groove between the two protrusions. Specifically, each of the two ends of the roller connecting plate 7 has a mounting block 701 on the upper side of its outer wall and a sliding block 702 on the lower side of its outer wall. The structures of the mounting block 701 and the sliding block 702 are respectively matched with the mounting groove 401 and the sliding groove 403, so that the roller connecting plate 7 can be connected to the speed measuring groove 4. The mounting blocks 701 on the roller connecting plate 7 at both ends can be placed in the mounting groove 401 on the speed measuring groove 4, thereby supporting the roller connecting plate 7 and allowing the speed measuring roller 3 to be located in the speed measuring groove 4. The sliding block 702 below the roller connecting plate 7 can be inserted into the sliding groove 403 on the inner wall of the speed measuring groove 4 and can slide relative to it. When the roller connecting plate 7 is connected to the speed measuring groove 4, the cooperation between the sliding block 702 and the sliding groove 403 can make the roller connecting plate 7 accurately positioned and remain stable when moving up and down.

[0024] Furthermore, the base plate 1 is provided with a separation mechanism 15 that can separate the speed measuring component 14 from the speed measuring groove 4. When measuring speed, the separation mechanism 15 can separate the speed measuring component 14 from the speed measuring groove 4 to achieve independent speed measurement. The separation mechanism 15 can disconnect the connection between the speed measuring roller 3 and the roller connecting plate 7 and the speed measuring groove 4. Through mechanical decoupling, the two are temporarily independent, thereby effectively preventing the vibration caused by the rotation of the speed measuring roller 3 from directly acting on the weighing platform 2 during speed measurement, which could damage or even destroy the weighing sensor and affect its measurement accuracy. Specifically, the base plate 1 is provided with a base plate groove 8 corresponding to the speed measuring groove 4 in the weighing platform 2. The position and size of the base plate groove 8 correspond to the speed measuring groove 4. The base plate groove 8 has a hollow structure inside, with an open top and a closed bottom. The separation mechanism 15 is located in the hollow cavity of the base plate groove 8. The separation mechanism 15 includes a cylinder 11 connected to the bottom surface of the bottom plate groove 8, a push plate 9 connected to the output end of the cylinder 11, and a plurality of push columns 10 on the upper surface of the push plate 9. This separation mechanism 15 can drive the push plate 9 through the cylinder 11 to drive the push columns 10 to push the roller connecting plate 7 upward, thereby causing the roller connecting plate 7 to drive the speed measuring roller 3 to disconnect from the speed measuring groove 4 to achieve separation.

[0025] In this embodiment, both sides of the bottom of the speed measuring groove 4 are provided with a support plate 402 for supporting the bottom of the roller connecting plate 7. The length and width of the support plate 402 are the same as the length and width of the roller connecting plate 7. When the roller connecting plate 7 is placed inside the speed measuring groove 4, the bottom of the roller connecting plate 7 can be placed on the support plate 402, which plays a supporting role. Specifically, both sides of the stacking plates 402 are provided with vertically penetrating ejection holes 404. The position and number of ejection holes 404 correspond to the position and number of pushing columns 10 on the upper surface of the push plate 9, and the diameter of the ejection hole 404 is larger than the diameter of the pushing column 10. In this structure, the pushing column 10 can pass through the corresponding ejection hole 404, and the inner wall of the ejection hole 404 will not contact the outer wall of the pushing column 10. The bottom surface of the roller connecting plate 7 is provided with a corresponding position and number of pushing columns 10. The grooves and holes that match the structure are provided. The grooves and holes extend upwards and inwards along the bottom surface of the roller connecting plate 7. The pushing column 10, the ejector hole 404 and the grooves on the bottom surface of the roller connecting plate 7 are all evenly distributed. The pushing column 10 can pass through the ejector hole 404 and be inserted into the groove on the bottom surface of the roller connecting plate 7 to lift the roller connecting plate 7. By cooperating with the corresponding pushing column 10 and the groove on the bottom surface of the roller connecting plate 7, the pushing column 10 can stably lift the roller connecting plate 7 when moving upwards.

[0026] Furthermore, the heights of the stacking groove 401, sliding groove 403, stacking block 701, and sliding block 702 are all equal, L1. When the cylinder 11 is in its initial state, the distance from the top surface of the push column 10 to the top surface of the internal slot of the roller connecting plate 7 is L2, the height of the speed measuring groove 4 is L3, and the stroke of the cylinder 11 is L4, satisfying L2 + L3 > L4 > L1 + L2, when the cylinder 11 drives the push column 10 to move upward, its stroke ensures that the push column 10 can continue to move upward when it hits the top surface of the slot inside the roller connecting plate 7, and that the stacking block 701 and sliding block 702 on the roller connecting plate 7 can both disengage from the stacking slot 401 and sliding slot 403 on the speed measuring slot 4, so that the roller connecting plate 7 together with the speed measuring roller 3 can disconnect from the speed measuring slot 4 and separate from it. Thus, during speed measurement, the speed measuring structure can be independent of the weighing structure, avoiding interference. At the same time, the stroke of the cylinder 11 prevents the roller connecting plate 7 from moving completely outside the speed measuring slot 4, avoiding the speed measuring roller 3 from being raised too high and affecting its use.

[0027] In this embodiment, the inner walls on both sides of the bottom plate groove 8 are provided with a plurality of limiting grooves 801. The push plate 9 is provided with protruding posts on both sides that are inserted into the limiting grooves 801 and can slide within the limiting grooves 801. When the cylinder 11 drives the push plate 9 to move, the push plate 9 can move stably in the limiting grooves 801 through the protruding posts on both sides. The height of the limiting grooves 801 can be set along the height of the entire inner wall of the bottom plate groove 8, or it can be set at a distance to ensure that it does not affect the pushing column 10 pushing the roller connecting plate 7.

[0028] In this embodiment, the cylinder 11 adopts an existing high-pressure nitrogen cylinder, which has a relatively simple structure and small size, making it easy to install and use. It has a switch bolt inside to control the connection between the high-pressure nitrogen at the upper and lower ends of the piston. It has a switch bolt guide rod at the top connected to the internal switch bolt. The switch bolt guide rod can control the switch bolt to open or close, thereby controlling the lifting and lowering of the cylinder 11 (its specific construction principle will not be elaborated here). The bottom surface of the push plate 9 is hinged to an adjusting rod 12. The bottom surface of the push plate 9 is hinged to the adjusting rod 12 through a hinge seat and a through pin. The output ends of the cylinder 11 are connected to the bottom surface of the push plate 9 through connecting plates. There is a certain space between the adjusting rod 12 and the switch bolt guide rod at the top of the cylinder 11. When the adjusting rod 12 rotates downward through the hinge, its end can abut against the switch bolt guide rod, thereby opening the switch bolt and controlling the cylinder 11 to drive. When the cylinder 11 is driven, it drives the push plate 9 to move upward through the output end. Furthermore, the other end of the adjusting rod 12 passes through the bottom plate groove 8 and is located inside the bottom plate 1. It is hinged to the end of the rod by a pin and connected to the pressure rod 13. The bottom plate 1 has a slot inside for the adjustment rod 12 and the pressure rod 13 to move. The side of the bottom plate 1 has a strip groove for accommodating the pressure rod 13. When not in use, the pressure rod 13 can be stored in the strip groove on the side of the bottom plate 1, so that it is located inside the bottom plate 1. Thus, the entire device has no external structure. When in use, the pressure rod 13 can be rotated to make the pressure rod 13 and the adjusting rod 12 lie on the same straight line through the hinge of the end of the pressure rod 13 and the adjusting rod 12. Then, the pressure rod 13 is pushed upward. When the pressure rod 13 is pushed upward, it can drive one end of the adjusting rod 12 to move upward together. This causes the other end of the adjusting rod 12, which is hinged to the push plate 9, to move downward and abut against the switch bolt guide rod at the top of the cylinder 11, thereby controlling the cylinder 11 to drive.

[0029] In this embodiment, a ramp 5 is provided at one end of the weighing platform 2 and the base plate 1. The ramp 5 can be placed directly on the end face of the weighing platform 2 and the base plate 1 or hinged to the end face of the base plate 1 so that it can rotate. The ramp 5 facilitates the movement of the electric vehicle onto the weighing platform 2. The bottom of the base plate 1 can be provided with a support foot with adjustable height via a screw or a universal wheel with a locking structure to facilitate the placement and movement of the base plate 1. The choice can be made according to actual needs. The output ends of the weighing unit 6 and the speed measuring roller 3 are electrically connected to a display instrument to display the weight and speed values, so that law enforcement officers can see the measurement data on site to determine whether the electric vehicle exceeds the standard. The weighing unit 6, the speed measuring roller 3, and the display instrument can be powered by a battery or an external power source.

[0030] Working principle: When using this integrated weighing and speed measuring device for electric bicycles, the electric bicycle is first pushed onto the weighing platform 2 via the ramp 5, and its drive wheel is fixed between the two rollers of the speed measuring roller 3. The electric bicycle is stabilized by its support legs. After it is stabilized, it can be weighed. The weighing units 6 evenly distributed at the bottom of the weighing platform 2 can measure the weight of the electric bicycle and display the weight on the display instrument. After the weight test is completed, the speed test can be performed. When detecting speed, the pressure rod 13 can be removed by rotating it. Moving the pressure rod 13 upward causes the adjusting rod 12 to press down against the switch rod guide of the cylinder 11, thereby driving the cylinder 11. After the cylinder 11 is driven, it drives the push plate 9 to move upward, and the pushing column 10 on the push plate 9 also moves upward. When the pushing column 10 moves upward, it passes through the ejection hole 404 on the stacking plate 402 and then inserts into the slot on the bottom surface of the roller connecting plate 7. When the top surface of the pushing column 10 reaches the top surface of the slot, it will push the roller connecting plate 7 and the speed measuring roller 3 to move upward. As the movement continues, the stacking block 701 and the sliding block 702 on the roller connecting plate 7 will disengage from the stacking slot 401 and the sliding groove 403 in the speed measuring groove 4. When the stacking block 701 and the sliding block 702 on the roller connecting plate 7 are completely disengaged from the stacking slot 401 and the sliding groove 403, the roller connecting plate 7 will stop moving. The plate 7, along with the speed measuring roller 3, is disconnected from the speed measuring groove 4, allowing the speed measuring roller 3 to operate independently relative to the weighing platform 2. This prevents the rotation of the speed measuring roller 3 from interfering with the weighing platform 2 during speed measurement, thus affecting the measurement accuracy of the weighing unit 6. Then, the pressure rod 13 is released, the switch in the cylinder 11 closes, the cylinder 11 stops driving, and the pressure rod 13 rotates and is stored in the strip groove on the side of the base plate 1. Speed ​​measurement can then be performed. During speed measurement, the electric vehicle's throttle is turned, causing its drive wheel to rotate the speed measuring roller 3. The throttle is gradually turned to the maximum throttle of the electric vehicle and held for a certain period of time to measure the maximum speed of the electric vehicle. The speed measuring roller 3 can convert its rotation speed into a signal and transmit it to the display instrument to show the maximum speed of the electric vehicle, thereby completing the detection of the electric vehicle's weight and speed. The weight and speed of the electric vehicle are used to determine whether it is an oversized vehicle.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A weighing and speed measuring integrated detection device for electric bicycles, comprising a weighing platform (2), characterized in that: The weighing platform (2) is provided with a base plate (1) below it, and a number of evenly distributed weighing units (6) are provided between the weighing platform (2) and the base plate (1) for weighing the electric vehicle being tested. The weighing platform (2) is also provided with a speed measuring component (14) for detecting the speed of the electric vehicle. The weighing platform (2) is provided with a speed measuring slot (4), and the speed measuring component (14) is connected in the speed measuring slot (4) and located inside the weighing platform (2). The base plate (1) is provided with a separation mechanism (15) that can separate the speed measuring component (14) from the speed measuring groove (4). When measuring speed, the separation mechanism (15) can separate the speed measuring component (14) from the speed measuring groove (4) to achieve independent speed measurement.

2. The integrated weighing and speed measuring device for electric bicycles according to claim 1, characterized in that: The speed measuring component (14) includes a speed measuring roller (3) and roller connecting plates (7) connected to both ends of the speed measuring roller (3). The roller connecting plates (7) are provided with bearing seats inside and connected to the shaft of the speed measuring roller (3). The roller connecting plates (7) at both ends are connected to the speed measuring groove (4).

3. The integrated weighing and speed measuring device for electric bicycles according to claim 2, characterized in that: The speed measuring groove (4) is a groove that runs vertically through the top and bottom. It has a stacking groove (401) at the top of both sides and a sliding groove (403) on the inner walls of both sides. There are at least two stacking grooves (401) and sliding grooves (403) on each side of the speed measuring groove (4). One end of the stacking groove (401) extends a certain distance outward from the speed measuring groove (4), and the other end is open and flush with the inner wall of the speed measuring groove (4). The sliding groove (403) is a structure that extends a certain distance from the inner wall of the speed measuring groove (4) into the inner side of the speed measuring groove (4) and runs vertically through the groove. The roller connecting plates (7) at both ends are provided with a stacking block (701) on the upper side of the outer side wall and a sliding block (702) on the lower side of the outer side wall. The structure of the stacking block (701) and the sliding block (702) are respectively matched with the structure of the stacking groove (401) and the sliding groove (403) so that the roller connecting plate (7) can be connected to the speed measuring groove (4).

4. The integrated weighing and speed measuring device for electric bicycles according to claim 3, characterized in that: The base plate (1) is located below the speed measuring groove (4) in the weighing platform (2) and is provided with a corresponding base plate groove (8). The base plate groove (8) has a hollow structure inside, with an open top and a closed bottom. The separation mechanism (15) is located in the hollow cavity of the base plate groove (8). The separation mechanism (15) includes a cylinder (11) connected to the bottom surface of the bottom plate groove (8), a push plate (9) connected to the output end of the cylinder (11), and several push columns (10) on the upper surface of the push plate (9).

5. The integrated weighing and speed measuring device for electric bicycles according to claim 4, characterized in that: The speed measuring groove (4) is also provided with a support plate (402) on both sides of the bottom to support the bottom of the roller connecting plate (7), and the length and width of the support plate (402) are the same as the length and width of the roller connecting plate (7). Both sides of the stacking plate (402) are provided with ejection holes (404) that run vertically through them. The position and number of the ejection holes (404) correspond to the position and number of the push columns (10) on the upper surface of the push plate (9). The diameter of the ejection holes (404) is larger than the diameter of the push columns (10). The bottom surface of the roller connecting plate (7) is provided with slots that correspond to the position and number of the push columns (10) and match the structure. The slots extend upward along the bottom surface of the roller connecting plate (7) for a certain distance. The push columns (10) can pass through the ejection holes (404) and be inserted into the slots on the bottom surface of the roller connecting plate (7) to lift the roller connecting plate (7).

6. The integrated weighing and speed measuring device for electric bicycles according to claim 5, characterized in that: The heights of the stacking groove (401), sliding groove (403), stacking block (701) and sliding block (702) are all equal to L1. When the cylinder (11) is in its initial state, the distance from the top surface of the push column (10) to the top surface of the slot inside the roller connecting plate (7) is L2. The height of the speed measuring groove (4) is L3. The stroke of the cylinder (11) is L4, and L2 + L3 > L4 > L1 + L2 are satisfied.

7. The integrated weighing and speed measuring device for electric bicycles according to claim 4, characterized in that: The bottom plate groove (8) has several limiting grooves (801) on both sides of its inner wall. The push plate (9) has protruding posts on both sides that are inserted into the limiting grooves (801) and can slide in the limiting grooves (801).

8. The integrated weighing and speed measuring device for electric bicycles according to claim 4, characterized in that: The bottom surface of the push plate (9) is hinged with an adjusting rod (12), and the top of the cylinder (11) is provided with a switch bolt guide rod connected to the internal switch bolt. When the adjusting rod (12) rotates downward through the hinge, its end can abut against the switch bolt guide rod to control the cylinder (11) to drive.

9. The integrated weighing and speed measuring device for electric bicycles according to claim 8, characterized in that: The other end of the adjusting rod (12) passes through the bottom plate groove (8) and is located inside the bottom plate (1), and is hinged to the end of the pressure rod (13). The bottom plate (1) has a hollow groove inside for the adjusting rod (12) and the pressure rod (13) to move, and the side of the bottom plate (1) has a strip groove for accommodating the pressure rod (13).

10. A detection device integrating weighing and speed measurement for electric bicycles according to any one of claims 1-9, characterized in that: The weighing platform (2) and the base plate (1) are also provided with a ramp plate (5) at one end. The output ends of the weighing unit (6) and the speed measuring roller (3) are electrically connected to a display instrument for displaying weight and speed values.

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