A metrological verification apparatus for measuring a fare meter error

Abstract

The utility model discloses a kind of for measuring metering device error metrological verification equipment, it is related to metrological verification technical field, including first bearing frame, second bearing frame, third bearing frame, fourth bearing frame and fan frame;The first bearing frame side is provided with stretching mechanism, the stretching mechanism includes first connecting frame, second connecting frame, motor, connecting block, connecting rod and screw rod, the motor is set to first connecting frame side, the connecting rod is installed to first connecting frame side, and connecting block is installed to connecting rod side, the screw rod is set to first connecting frame side, the second connecting frame is installed to screw rod side, third, four bearing frames and first, second bearing frame structure are same, improve adaptability and balance;Fan heat dissipation of fan frame can actively protect vehicle, handle is convenient for operation;Adjusting shaft, positioning hole etc. cooperate, realize convenient positioning adjustment, spring reduces collision, protects equipment.

Description

Technical Field

[0001] This utility model relates to the field of metrological verification technology, specifically a metrological verification device for measuring the error of a price meter. Background Technology

[0002] The fare meter is a crucial device used in taxis and other transportation vehicles to calculate fares. Its accuracy directly affects the interests of both passengers and drivers. Therefore, during the production, maintenance, and use of fare meters, it is necessary to measure and verify their errors to ensure accuracy.

[0003] The existing technology, such as the multi-functional taxi meter automatic calibration device described in application number CN202323264954.7, achieves flexible adjustment of the detection distance through a distance adjustment mechanism—that is, rotating the operating lever drives the bidirectional threaded rod to rotate via a bevel gear transmission, and under the limit guidance of the guide slider, the two threaded cylinders drive the mounting base to move towards or away from each other as the threaded rod rotates, thus completing the precise adjustment of the detection distance—but has significant defects in actual calibration operations: when the vehicle is in the idling detection state, the engine cooling system lacks the forced convection effect during driving, and the cooling efficiency drops significantly. If the detection time is too long, the heat generated by the engine running under continuous high load cannot be dissipated in time, which can easily lead to overheating of the power system, causing serious faults such as cylinder deformation and lubrication failure, and causing irreversible damage to the vehicle engine;

[0004] Based on this, this solution proposes "a metrological verification device for measuring the error of a taximeter" to address the aforementioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a metrological verification device for measuring the error of a taximeter, in order to solve the problem mentioned in the background art that when a vehicle is stationary and the test time is too long, it cannot effectively dissipate heat, and the vehicle engine is extremely prone to overheating and damage.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a metrological verification device for measuring the error of a taximeter, comprising a first support frame, a second support frame, a third support frame, a fourth support frame, and a fan frame;

[0007] An extension mechanism is provided on the side of the first support frame. The extension mechanism includes a first connecting frame, a second connecting frame, a motor, a connecting block, a connecting rod, and a lead screw. The motor is located on the side of the first connecting frame, the connecting rod is installed on the side of the first connecting frame, and the connecting block is installed on the side of the connecting rod. The lead screw is located on the side of the first connecting frame, and the second connecting frame is installed on the side of the lead screw.

[0008] As a preferred technical solution of this utility model, the first support frame is a right-angled trapezoidal structure, and a support wheel is rotatably connected to the bottom of the first support frame, and a high-strength bearing is provided at the connection between the support wheel and the first support frame.

[0009] The above technical solution features a right-angled trapezoidal structure for the first support frame, providing a stable foundation for the equipment and ensuring the overall structural stability during calibration, thus reducing the impact of shaking on measurement accuracy. A rotating support wheel is connected below, facilitating equipment movement and enhancing flexibility in different calibration scenarios. Furthermore, high-strength bearings are used at the connection between the support wheel and the first support frame, reducing rotational friction, minimizing component wear, extending equipment lifespan, and ensuring smooth rotation of the support wheel to prevent jamming that could affect movement or positioning accuracy.

[0010] As a preferred technical solution of this utility model, a calibration wheel is rotatably connected above the first support frame. The surface of the calibration wheel is uniformly provided with anti-slip texture, and the side of the calibration wheel is fixedly connected to the motor shaft end. The motor is equipped with a wheel speed sensor, and there are two parallel calibration wheels. The side of each calibration wheel is fixedly connected to a pulley, and the pulleys are connected to each other by a belt. A fixing frame is fixedly connected to the side of the first support frame, and the fixing frame is hollow and equipped with an X-bracing structure. The fixing frame is a right-angled U-shaped structure, and the side of the fixing frame is fixedly connected to a second support frame.

[0011] Using the above technical solution, the calibration wheel rotatably connected above the first support frame has uniformly arranged anti-slip textures on its surface, which increases the friction with the tested taximeter, prevents slippage, ensures accurate transmission of the calibration wheel's rotation, and guarantees measurement accuracy. The motor is equipped with a wheel speed sensor, which can accurately monitor the rotation speed of the calibration wheel and provide precise parameters for error calculation. The two parallel calibration wheels are fixedly connected to pulleys on their sides and connected by belts, enabling synchronous rotation and simulating the stable wheel speed of real driving. This makes the taximeter's measurement state closer to the actual use scenario, improving the authenticity of the calibration. The fixed frame fixedly connected to the side of the first support frame is hollow and equipped with an X-bracing structure. While ensuring strength, it reduces weight, saves materials, and facilitates heat dissipation, enhancing the overall stability of the equipment. At the same time, the fixed frame has a right-angled U-shaped structure, which can stably connect to the second support frame, further improving the overall structural integrity.

[0012] As a preferred technical solution of this utility model, the side of the fixed frame is fixedly connected to the connecting block, the side of the connecting block is rotatably connected to one end of the connecting rod, and the other end of the connecting rod is rotatably connected to the first connecting frame. The motor is fixedly connected to the inner side of the first connecting frame, the output shaft of the motor is fixedly connected to the lead screw, one end of the lead screw is threaded to the second connecting frame, and the second connecting frame and the side of the first connecting frame are both rotatably connected to a pair of connecting rods.

[0013] The above technical solution involves a connecting block fixedly connected to the side of the fixed frame and rotatably connected to one end of a connecting rod. The other end of the connecting rod is rotatably connected to the first connecting frame. The motor output shaft, fixedly connected to the inner side of the first connecting frame, is also fixedly connected to a lead screw. One end of the lead screw is threadedly connected to the second connecting frame. Both the second and first connecting frames are rotatably connected to a pair of connecting rods on their sides. This structure allows for flexible adjustment of the extension mechanism, adapting to different sizes and installation positions of taximeters, thus expanding the equipment's applicability. Simultaneously, the lead screw drive enables precise adjustment, ensuring controllable contact parameters between the calibration wheel and the tested taximeter. The symmetrical connecting rod support structure also enhances stability during adjustment, preventing deformation under unilateral stress and ensuring the long-term reliability of the equipment.

[0014] As a preferred embodiment of this utility model, the first support frame is connected to the third support frame and the fourth support frame at opposite positions. The third support frame and the fourth support frame have the same overall structure as the first support frame and the second support frame. The first support frame and the second support frame are rotatably connected to a fan frame. The fan frame is composed of six fans with the same structure. A handle is provided on the top of the fan frame. An adjustment shaft is fixedly connected to the side of the fan frame at the connection with the first support frame and the second support frame. Eight positioning holes are evenly opened on the side of the adjustment shaft. A pin is slidably connected to the side of the fourth support frame. A spring is fitted on the left side of the pin.

[0015] The above technical solution involves a third and fourth support frame connected to the first support frame at opposite positions. These frames share the same overall structure as the first and second support frames, forming a symmetrical layout. This allows for multi-directional support and positioning of the tested taximeter, improving adaptability to different types of taximeters and enhancing the overall structural balance of the equipment. The fan frame, rotatably connected between the first and second support frames, consists of six identical fans. This fan frame dissipates heat from components such as motors, preventing high temperatures from affecting equipment performance or causing malfunctions, and extending continuous working time. A handle is also provided on top of the fan frame for easy operation. An adjusting shaft, fixedly connected to the side of the fan frame at the connection point with the first and second support frames, has eight evenly spaced positioning holes on its side that engage with a sliding pin on the side of the fourth support frame. A spring fitted on the left side of the pin provides preload, enabling convenient positioning and adjustment of equipment components. The operation is simple, the positioning is secure, and the spring reduces rigid collisions during adjustment, protecting the equipment structure.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] The first support frame has a right-angled trapezoidal structure, which provides strong stability; the support wheels below facilitate equipment movement, and the high-strength bearings at the connection between the wheels and the support frame reduce friction and wear, extend equipment life, and ensure smooth rotation.

[0018] The anti-slip texture on the surface of the calibration wheel prevents slippage and ensures accurate measurement; the wheel speed sensor of the motor provides accurate rotation speed parameters, and the two calibration wheels rotate synchronously through pulleys to simulate real driving conditions; the hollow and X-bracket structure of the fixing frame reduces weight and saves materials, facilitates heat dissipation, and enhances stability;

[0019] The extension mechanism, composed of connecting blocks and connecting rods, is flexible in adjustment and adaptable to different price meters; the screw drive enables precise adjustment, and the symmetrical connecting rod structure enhances stability, prevents deformation, and ensures reliable use of the equipment;

[0020] The third and fourth support frames have the same structure as the first and second support frames, improving adaptability and balance; the fan frame's fan cooling can actively protect the vehicle, and the handle is easy to operate; the adjustment shaft, positioning holes, etc., work together to achieve convenient positioning and adjustment, and the springs reduce collisions and protect the equipment. Attached Figure Description

[0021] Figure 1 This is a side view of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the first connecting frame and the second connecting frame of this utility model;

[0023] Figure 3 This is a schematic diagram of the first and second support frames of this utility model;

[0024] Figure 4 This is a schematic diagram of the motor and connecting block structure of this utility model;

[0025] Figure 5 This is a schematic diagram of the first support frame and support wheel structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the structure of the bearing wheel and the calibration wheel of this utility model;

[0027] Figure 7 This is a schematic diagram of the motor and connecting block structure of this utility model;

[0028] Figure 8 This is a schematic diagram of the pin and spring structure of this utility model.

[0029] In the diagram: 1. First support frame; 2. Second support frame; 3. Third support frame; 4. Fourth support frame; 5. Support wheel; 6. Calibration wheel; 7. First connecting frame; 8. Second connecting frame; 9. Fixing frame; 10. Motor; 11. Connecting block; 12. Connecting rod; 13. Lead screw; 14. Pulley; 15. Adjusting shaft; 16. Positioning hole; 17. Pin; 18. Spring; 19. Fan bracket. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figure 1 - Figure 8 The present invention provides a metrological verification device for measuring the error of a taximeter, comprising a first support frame 1, a second support frame 2, a third support frame 3, a fourth support frame 4, a support wheel 5, a verification wheel 6, a first connecting frame 7, a second connecting frame 8, a fixing frame 9, a motor 10, a connecting block 11, a connecting rod 12, a lead screw 13, a pulley 14, an adjusting shaft 15, a positioning hole 16, a pin 17, a spring 18, and a fan frame 19.

[0032] The first support frame 1 has a right-angled trapezoidal structure, and a support wheel 5 is rotatably connected to the bottom of the first support frame 1. The connection between the support wheel 5 and the first support frame 1 uses a high-strength bearing. The right-angled trapezoidal structure of the first support frame 1 has excellent mechanical stability, providing a solid support base for the entire equipment and effectively avoiding measurement deviations caused by frame shaking during calibration operations. The support wheel 5 rotatably connected to the bottom gives the equipment good mobility, meeting the spatial adaptability requirements of calibration operations in multiple scenarios. The high-strength bearing at the connection between the support wheel 5 and the first support frame 1 can significantly reduce the friction coefficient of the rotating pair, reduce mechanical wear to extend the service life of the equipment, and at the same time ensure the smooth rotation of the support wheel 5, ensuring the movement and positioning accuracy of the equipment.

[0033] The first support frame 1 is rotatably connected to the calibration wheel 6. The surface of the calibration wheel 6 is evenly provided with anti-slip texture, and the side of the calibration wheel 6 is fixedly connected to the shaft end of the motor 10. The motor 10 is equipped with a wheel speed sensor, and there are two parallel calibration wheels 6. The sides of each calibration wheel 6 are fixedly connected to pulleys 14, which are connected to each other by a belt. The first support frame 1 is fixedly connected to the side of the fixing frame 9, and the fixing frame 9 is hollow and equipped with an X-bracing structure. The fixing frame 9 is a right-angled U-shaped structure. The side of the fixing frame 9 is fixedly connected to the second support frame 2. The anti-slip texture on the surface of the calibration wheel 6 can increase the contact friction with the tested taximeter, eliminate relative slippage, and ensure the accuracy of speed transmission. This provides a reliable basis for error measurement; the wheel speed sensor matched with motor 10 can collect the precise rotation speed data of calibration wheel 6 in real time, providing high-precision parameter support for the calculation of the meter error; the dual calibration wheels 6 achieve synchronous transmission with belt through pulley 14, which can simulate the stable wheel speed under real driving conditions, making the calibration environment closer to the actual working conditions and improving the authenticity and effectiveness of the calibration results; the fixing frame 9 adopts a hollow design and X-bracket structure, which achieves lightweight design while ensuring structural strength, saving material costs and optimizing heat dissipation performance. Its right-angle U-shaped structure and the solid connection with the second bearing frame 2 further enhance the overall structural rigidity and integration of the equipment;

[0034] A connecting block 11 is fixedly connected to the side of the fixed frame 9. The side of the connecting block 11 is rotatably connected to one end of the connecting rod 12, and the other end of the connecting rod 12 is rotatably connected to the first connecting frame 7. A motor 10 is fixedly connected to the inside of the first connecting frame 7. The output shaft of the motor 10 is fixedly connected to the lead screw 13. One end of the lead screw 13 is threaded to the second connecting frame 8. Both the second connecting frame 8 and the first connecting frame 7 are rotatably connected to a pair of connecting rods 12. The fixed frame 9 achieves a rotatable connection with the first connecting frame 7 through the connecting block 11 and the connecting rod 12, in conjunction with the lead screw 12 driven by the motor 10. The transmission structure enables the extension mechanism to have multi-dimensional adjustment capabilities, which can be adapted to taximeters of different specifications and installation positions, greatly expanding the applicability of the equipment; the screw drive characteristics of the lead screw 13 ensure the precise control of the adjustment process and can accurately set the contact parameters between the calibration wheel 6 and the taximeter under test; the symmetrical connecting rod 12 structure on the sides of the second connecting frame 8 and the first connecting frame 7 forms a stable parallelogram support mechanism, which effectively resists the unilateral load during the adjustment process, avoids structural deformation, and ensures the reliability and stability of the equipment in long-term operation;

[0035] The first support frame 1 is connected to the third support frame 3 and the fourth support frame 4 in opposite positions. The third support frame 3 and the fourth support frame 4 have the same overall structure as the first support frame 1 and the second support frame 2. The first support frame 1 and the second support frame 2 are rotatably connected to a fan frame 19. The fan frame 19 consists of six fans with the same structure. A handle is provided on the top of the fan frame 19. An adjusting shaft 15 is fixedly connected to the side of the fan frame 19 where it connects to the first support frame 1 and the second support frame 2. Eight positioning holes 16 are evenly opened on the side of the adjusting shaft 15. A pin 17 is slidably connected to the side of the fourth support frame 4. A spring 18 is fitted on the left side of the pin 17. The third support frame 3, the fourth support frame 4, and the first support frame 1 and the second support frame 2 form a symmetrical multi-support structure. The support structure can position and support the tested taximeter from multiple directions, significantly improving the equipment's adaptability to different types of taximeters, while optimizing the overall structural stress balance; the six-fan layout of the fan frame 19 can form an efficient heat dissipation airflow, forcibly cooling the core heat-generating components such as the motor 10, avoiding performance degradation or failure caused by high temperature, and extending the continuous working time of the equipment. Its handle is easy to operate and adjust; the positioning hole 16 of the adjusting shaft 15, together with the pin 17 and the spring 18, forms an elastic positioning mechanism. The preload of the spring 18 achieves quick positioning and firm locking, which is convenient to operate and has high adjustment accuracy. At the same time, the spring 18 can buffer the mechanical impact during the adjustment process, reduce component wear, and protect the structural integrity of the equipment.

[0036] Working principle: When using a metrological verification device for measuring the error of a fare meter, the device is first moved to a suitable position by the bearing wheels 5 under the first bearing frame 1. The right-angled trapezoidal structure of the first bearing frame 1 ensures overall stability. Then, according to the size and installation position of the fare meter being tested, the relative position of the verification wheel 6 and the fare meter is adjusted by the extension mechanism: the motor 10 drives the lead screw 13 to rotate, which drives the second connecting frame 8 to move. With the rotational connection of the connecting block 11 and the connecting rod 12, the extension structure formed by the first connecting frame 7 and the second connecting frame 8 can flexibly extend and retract, ensuring that the verification wheel 6 makes precise contact with the sensing component of the fare meter.

[0037] After the motor 10 is started, the motor 10 drives one of the calibration wheels 6 to rotate. Through the transmission action of the pulley 14 and the belt, the two parallel calibration wheels 6 rotate synchronously. The anti-slip texture on the surface of the calibration wheel 6 prevents slippage between it and the meter's sensing components, ensuring accurate speed transmission. The wheel speed sensor configured in the motor 10 monitors the speed of the calibration wheel 6 in real time and records the number of rotations to calculate the simulated travel distance.

[0038] The test meter performs measurement work under the drive of the calibration wheel 6. The equipment compares the actual simulated distance collected by the wheel speed sensor with the measurement distance displayed by the meter and calculates the error value of the meter.

[0039] During the process, the six fans on the fan frame 19 can be directed to the front of the vehicle to actively intake air and prevent damage to the vehicle during the inspection. If it is necessary to adjust the angle of the fan frame 19, pull out the pin 17 and rotate the fan frame 19 with the adjusting shaft 15 as the axis. After the positioning hole 16 is aligned, the spring 18 pushes the pin 17 to insert into the positioning hole 16 to complete the fixation. The third support frame 3 and the fourth support frame 4 form symmetrical support, which further ensures the stability of the verification process and ensures accurate and reliable error measurement.

[0040] This completes a series of tasks. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A metrological verification device for measuring the error of a taximeter, comprising a first support frame (1) and a fixing frame (9); characterized in that: The first support frame (1) is provided with an extension mechanism on its side. The extension mechanism includes a first connecting frame (7), a second connecting frame (8), a motor (10), a connecting block (11), a connecting rod (12), and a lead screw (13). The motor (10) is located on the side of the first connecting frame (7), the connecting rod (12) is installed on the side of the first connecting frame (7), and the connecting block (11) is installed on the side of the connecting rod (12). The lead screw (13) is located on the side of the first connecting frame (7), and the second connecting frame (8) is installed on the side of the lead screw (13).

2. The metrological verification device for measuring the error of a taximeter according to claim 1, characterized in that, The first support frame (1) is a right-angled trapezoidal structure, and the support wheel (5) is rotatably connected to the bottom of the first support frame (1), and the support wheel (5) is connected to the first support frame (1) with a high-strength bearing.

3. A metrological verification device for measuring the error of a taximeter according to claim 1, characterized in that, The first support frame (1) is rotatably connected to the inspection wheel (6). The surface of the inspection wheel (6) is uniformly provided with anti-slip texture. The side of the inspection wheel (6) is fixedly connected to the shaft end of the motor (10). The motor (10) is equipped with a wheel speed sensor. There are two parallel inspection wheels (6). The side of each inspection wheel (6) is fixedly connected to a pulley (14). The pulleys (14) are connected to each other by a belt. The side of the first support frame (1) is fixedly connected to a fixing frame (9). The fixing frame (9) is hollow and equipped with an X-bracing structure. The fixing frame (9) is a right-angled U-shaped structure. The side of the fixing frame (9) is fixedly connected to a second support frame (2).

4. A metrological verification device for measuring the error of a taximeter according to claim 1, characterized in that, The fixed frame (9) is fixedly connected to the connecting block (11) on the side. The side of the connecting block (11) is rotatably connected to one end of the connecting rod (12), and the other end of the connecting rod (12) is rotatably connected to the first connecting frame (7). The motor (10) is fixedly connected to the inner side of the first connecting frame (7). The output shaft of the motor (10) is fixedly connected to the lead screw (13). One end of the lead screw (13) is threadedly connected to the second connecting frame (8). The second connecting frame (8) and the first connecting frame (7) are both rotatably connected to a pair of connecting rods (12).

5. A metrological verification device for measuring the error of a taximeter according to claim 1, characterized in that, The first support frame (1) is connected to the third support frame (3) and the fourth support frame (4) in opposite positions. The third support frame (3) and the fourth support frame (4) have the same overall structure as the first support frame (1) and the second support frame (2). The first support frame (1) and the second support frame (2) are rotatably connected to the fan frame (19). The fan frame (19) is composed of six fans with the same structure. A handle is provided on the top of the fan frame (19). The side of the fan frame (19) is fixedly connected to the adjustment shaft (15) at the connection between the first support frame (1) and the second support frame (2). Eight positioning holes (16) are evenly opened on the side of the adjustment shaft (15). The side of the fourth support frame (4) is slidably connected to the pin (17). A spring (18) is fitted on the left side of the pin (17).

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