Loading equipment for testing driving range of electric vehicle

Abstract

The invention discloses loading equipment for testing the driving range of an electric vehicle, the loading equipment comprises a shell, a cover shell and a plurality of counterweights, a loading mechanism, a traction mechanism and a protection mechanism are arranged in the shell, the loading mechanism is used for installing the counterweights, the traction mechanism is used for loading the counterweights into the shell, and the protection mechanism is used for protection when the counterweights are installed; the loading mechanism comprises a plurality of connecting sleeves and connecting strips, and the connecting sleeves and the connecting strips are alternately arranged and fixedly connected with one another. According to the device, the corresponding number of counterweights can be selected to be loaded into the shell according to the loading capacity required by an experiment, so that the rated counterweight is provided for the vehicle to carry out endurance test, the numerical value change of the vehicle load can be conveniently controlled, and the shell is firstly placed in the vehicle in the process of adding the counterweight to the vehicle, and then the endurance test is carried out. And then the counterweight is arranged in the shell, so that the whole structure can be broken up into parts to reduce the labor intensity in the process of adding the counterweight to the vehicle, and the test process can be conveniently carried out.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle endurance testing, and in particular to a load-bearing device for electric vehicle endurance mileage testing. Background Art

[0002] In recent years, with the gradual increase in the market share of new energy vehicles, the driving range of electric vehicles has become the main energy consumption indicator that consumers are concerned about. At present, the nominal driving range of products sold by various new energy vehicle companies mostly adopts GB / T18386.1-2021 "Test method for energy consumption and driving range of electric vehicles Part 1: Light vehicles", which is the normal temperature test result under CLTC (China Light Vehicle Test Cycle) conditions;

[0003] However, in addition to the above national standards, since the rolling resistance of the tire is proportional to the weight of the vehicle when driving at medium and low speeds, the greater the vehicle load, the greater the tire rolling resistance, which in turn affects the cruising range; in addition, air resistance is related to the vehicle speed, the vehicle's air resistance coefficient and the windward area. Therefore, the vehicle load not only increases the rolling resistance of the tire, but may also cause changes in the vehicle's external dimensions due to the increase in load, which in turn affects the air resistance, and the combined effect reduces the cruising range.

[0004] It can be seen that the heavier the vehicle, the greater the rolling resistance of the tire, which will affect the cruising range. Therefore, it is still necessary to test the cruising range of vehicles under different load conditions to reflect the actual comprehensive energy consumption level of electric vehicles; the common way to add weight to the vehicle is to choose heavy objects of different weights or people of different weights to ride in the vehicle to meet the experimental needs, but the former process of carrying heavy objects has a high labor intensity, and the latter is difficult to control the variables of people's weight at different times and stages, so it is not convenient for the vehicle to test the cruising range under different load conditions. Summary of the invention

[0005] In view of the above-mentioned prior art, the invention is to provide a load-bearing device for testing the driving range of an electric vehicle, and the main technical problem to be solved is how to facilitate the driving range test of the vehicle under different load conditions.

[0006] To achieve the above object, the technical solution of the embodiment of the invention is implemented as follows:

[0007] A load-bearing device for testing the driving range of an electric vehicle comprises a housing, a cover and a plurality of counterweights. A load-bearing mechanism, a traction mechanism and a protection mechanism are arranged inside the housing. The load-bearing mechanism is used to install the counterweights, the traction mechanism is used to load the weights into the housing, and the protection mechanism is used to protect the counterweights during installation.

[0008] The load-bearing mechanism includes a plurality of connecting sleeves and connecting strips, which are arranged alternately and fixedly connected to each other, and the connecting sleeves are adapted to the counterweights. The traction mechanism includes a rotating shaft, which is used to reel in the connecting sleeves and the connecting strips. The protective mechanism includes a ratchet block, a ratchet wheel and a limit assembly. The ratchet block limits the rotation direction of the rotating shaft by engaging the ratchet wheel. The limit assembly includes two magnet sheets, and the two magnet sheets control the lifting and lowering of the ratchet block by repelling and attracting each other.

[0009] Furthermore, a partition is fixedly connected to one side of the interior of the shell, and circular through holes are provided in the middle of the plate body of the partition and in the middle of one side of the shell away from the partition. The rotating shaft is rotatably connected to the shell and the partition at the two circular through holes, and the ratchet is connected to one end of the rotating shaft outside the shell by a key, and the side wall of the shell is fixedly connected to a cover shell outside the ratchet.

[0010] Furthermore, a rectangular opening is provided at the bottom end of the cover shell, the ratchet block is slidably connected to the cover shell at the rectangular opening, and the bottom end of the ratchet block is fixedly connected to a base, the bottom end of the cover shell is fixedly connected to a fixing box at the outside of the rectangular opening, a fixing sleeve is fixedly connected to the bottom end of the inner wall of one side of the fixing box, and a strip opening is provided at the bottom end of the other side of the fixing box, the fixing box is provided with a fixing frame at the strip opening, and two magnet sheets are respectively fixedly connected to the bottom end of the base and the inner side of the fixing frame.

[0011] Furthermore, connecting piles are fixedly connected to both sides of the fixing frame, and one end of the two connecting piles is fixedly connected to a fixing pile and a knob respectively. The fixing box has a circular opening in the middle of the strip opening, the connecting pile is adapted to the circular opening, the knob is located outside the fixing box, and the diameter of the knob is larger than the diameter of the circular opening and the width of the strip opening. The fixing pile and the fixing sleeve are both elliptical, and the fixing pile is adapted to the fixing sleeve.

[0012] Furthermore, the rotating shaft is fixedly connected to the outside of the rod body in the outer shell with a sleeve, the connecting bar is fixedly connected to the sleeve, the outside of the end of the rotating shaft away from the ratchet block is connected to the driven wheel through a key, the bottom end of the side of the partition away from the sleeve is rotatably connected to a rotating rod, and a rotating through hole is opened on the side of the outer shell close to the partition, and one end of the rotating rod extends to the outside of the outer shell at the rotating through hole.

[0013] Furthermore, the rotating rod is connected to a driving wheel via a key outside the rod body in the shell, the driving wheel is meshed with the driven wheel, and the diameter of the driving wheel is smaller than the diameter of the driven wheel. One end of the rotating rod outside the shell is fixedly connected to a connecting rod, and a crank is fixedly connected to one end of the connecting rod.

[0014] Furthermore, a base is fixedly connected to the bottom end of the shell, and a pick-up and release opening is opened on one side of the shell, the shell is rotatably connected to a cover shell at the pick-up and release opening, a groove is opened at one end of the cover shell, and the cover shell is rotatably connected to a roller at the groove, and supporting feet are fixedly connected at both ends of the outer side of the cover shell, and a handle is fixedly connected at the middle between the two supporting feet.

[0015] Furthermore, the counterweight is made of cast iron, and one end of the counterweight is fixedly connected to a handle, and one end of the handle is fixedly connected to a hand guard.

[0016] Furthermore, a plurality of protrusions are fixedly connected to the inner wall of the connecting sleeve at equal intervals, and the material of the protrusions is rubber.

[0017] The beneficial effects of the invention are:

[0018] 1. This device can select a corresponding number of counterweights to be loaded into the shell according to the load required by the experiment, so as to provide a quota counterweight for the vehicle to carry out an endurance test. This not only facilitates the control of the numerical change of the vehicle load, but also the process of adding counterweight to the vehicle is to first put the shell in the car, and then load the counterweight into the shell. Therefore, it can be broken down into parts to reduce the labor intensity in the process of adding counterweight to the vehicle, so it is convenient to carry out the test process; in addition, when the counterweight is loaded into the shell, the engagement of the ratchet with the ratchet wheel can ensure that the shaft sleeve will not rotate in the opposite direction, so as to ensure the safety of the counterweight when it is loaded into the shell; by adjusting the flipping of the fixed frame, the two magnet sheets can be in a state of attraction and repulsion respectively. In these two states, it is respectively conducive to the release and retraction of the connecting strip, so the convenience of loading and unloading the counterweight can be ensured.

[0019] 2. During the loading process of the counterweight, the cover shell can provide support through the roller, thus ensuring the smoothness and stability of the loading process. After the counterweight is loaded, the cover shell can be used to close the shell to ensure the safety of the vehicle during driving;

[0020] 3. By arranging a plurality of rubber material protrusions on the inner wall of the connecting sleeve, after the counterweight is installed in the connecting sleeve, the protrusions can increase the friction between the counterweight and the connecting sleeve, thereby making the installation of the counterweight more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a three-dimensional diagram of a load-bearing device for testing the driving range of an electric vehicle in Example 1 of the present application;

[0022] Figure 2 A cross-sectional view of a housing of a load-carrying device for testing the driving range of an electric vehicle in Example 1 of the present application;

[0023] Figure 3A three-dimensional diagram of a cover shell of a load-carrying device for testing the driving range of an electric vehicle in Example 1 of the present application;

[0024] Figure 4 A side cross-sectional view of a cover of a load-carrying device for testing the driving range of an electric vehicle in Example 1 of the present application;

[0025] Figure 5 This is an exploded view of a fixing box of a load-bearing device for testing the driving range of an electric vehicle in Example 1 of the present application;

[0026] Figure 6 This is a cross-sectional view of a connecting sleeve of a load-bearing device for testing the driving range of an electric vehicle in Example 2 of the present application.

[0027] Description of Figure Numbers:

[0028] Shell 1, sleeve 2, cover shell 3, fixing box 4, base 5, cover shell 6, support foot 601, handle 602, counterweight 7, grip 701, connecting sleeve 8, protrusion 801, connecting strip 9, roller 10, rotating shaft 11, partition 12, driven wheel 13, crank 14, connecting rod 15, rotating rod 16, driving wheel 17, ratchet block 18, ratchet wheel 19, base 20, connecting pile 21, fixing pile 22, fixing frame 23, magnet sheet 24, knob 25, fixing sleeve 26. DETAILED DESCRIPTION

[0029] The technical solution of the invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the invention. The terms used in the specification of the invention herein are only for the purpose of describing specific embodiments and are not intended to limit the invention. In the following description, the expression "some embodiments" is involved, which describes a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0030] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] Example 1

[0032] See attached Figure 1-5The present application provides a load-bearing device for testing the driving range of an electric vehicle, comprising a housing 1, a cover housing 6 and a plurality of counterweights 7. A load-bearing mechanism, a traction mechanism and a protection mechanism are arranged inside the housing 1. The load-bearing mechanism is used to install the counterweights 7, so that the scattered counterweights 7 can be assembled by a connecting sleeve 8 and a connecting strip 9. The traction mechanism is used to load the counterweights 7 into the housing 1. Therefore, the traction mechanism can pull the counterweights 7 and install them into the housing 1 by winding up the connecting sleeve 8 and the connecting strip 9. The protection mechanism is used to protect the counterweights 7 during installation, so as to ensure the stability and safety of the counterweights 7 during installation.

[0033] The load-bearing mechanism includes a plurality of connecting sleeves 8 and connecting strips 9, which are alternately arranged and fixedly connected to each other. The connecting sleeve 8 is adapted to the counterweight 7, and the installation can be achieved by placing the counterweight 7 in the connecting sleeve 8. The existence of the connecting strip 9 is to ensure that the two adjacent connecting sleeves 8 are not in a relatively fixed state. In this case, the connecting sleeve 8 and the connecting strip 9 can be smoothly rolled up under the rotation of the rotating shaft 11. The traction mechanism includes a rotating shaft 11, which is used to roll up the connecting sleeve 8 and the connecting strip 9. The protective mechanism includes a ratchet block 18, a ratchet wheel 19 and a limit assembly. The ratchet block 18 is engaged by the ratchet wheel The wheel 19 is used to limit the rotation direction of the rotating shaft 11. The ratchet block 18 engages with the ratchet wheel 19 to limit the latter to rotate in a single direction, and the counterweight weight 7 will not rotate in the opposite direction due to the gravity of the counterweight weight 7 during the winding process, which will cause the counterweight weight 7 to fall. The limiting component includes two magnet pieces 24. The two magnet pieces 24 control the lifting and lowering of the ratchet block 18 by repelling and attracting each other. The repelling and attracting states of the two magnet pieces 24 can respectively maintain the ratchet block 18 and the ratchet wheel 19 in an engaged or separated state, and these two states can respectively facilitate the collection and release of the counterweight weight 7, thereby facilitating the loading and unloading of the counterweight weight 7.

[0034] Preferably, a partition 12 is fixedly connected to one side of the interior of the shell 1, and circular through holes are provided in the middle of the plate body of the partition 12 and in the middle of one side of the shell 1 away from the partition 12. The rotating shaft 11 is rotatably connected to the shell 1 and the partition 12 at the two circular through holes. The ratchet 19 is connected to one end of the rotating shaft 11 outside the shell 1 through a key, and the side wall of the shell 1 is fixedly connected to the cover 3 outside the ratchet 19. Since the ratchet 19 is connected to the rotating shaft 11, the restriction on the rotation direction caused by the engagement of the ratchet block 18 on the ratchet 19 can be reflected on the rotating shaft 11, so the counterweight 7 can be stably and safely received in the shell 1.

[0035] Preferably, a rectangular opening is provided at the bottom end of the cover shell 3, and the ratchet block 18 is slidably connected to the cover shell 3 at the rectangular opening. The ratchet block is in the shape of a foot ladder, and the inclined surface of the upper end thereof is adapted to the ratchet on the ratchet wheel 19, and the cube shape of the lower end thereof is adapted to the rectangular opening, so as to ensure that the ratchet block 18 will only slide up and down at the rectangular opening without rotating or deflecting, and the bottom end of the ratchet block 18 is fixedly connected to the base 20, and the bottom end of the cover shell 3 is fixedly connected to the fixing box 4 at the outside of the rectangular opening, and the inner wall of one side of the fixing box 4 A fixing sleeve 26 is fixedly connected at the bottom end, and a strip opening is opened at the bottom end of the other side of the fixing box 4. The fixing box 4 is provided with a fixing frame 23 at the strip opening. The fixing frame 23 can be pulled out at the strip opening, and then the knob 25 can be rotated to flip the magnet sheet 24 inside the fixing frame 23, thereby adjusting the state of attraction or repulsion between the two magnet sheets 24, thereby realizing the adjustment of the state of the ratchet block 18. The two magnet sheets 24 are fixedly connected to the bottom end of the base 20 and the inner side of the fixing frame 23, respectively.

[0036] Preferably, both sides of the fixing frame 23 are fixedly connected with connecting piles 21, and one end of the two connecting piles 21 is fixedly connected with a fixing pile 22 and a knob 25 respectively. The fixing box 4 has a circular opening in the middle of the strip opening, and the area of ​​the fixing pile 22 is larger than the area of ​​the circular opening, so it can prevent the fixing frame 23 from being separated from the fixing box 4 by pulling the knob 25. The connecting pile 21 is adapted to the circular opening, and the knob 25 is located outside the fixing box 4, and the diameter of the knob 25 is larger than the diameter of the circular opening and the width of the strip opening. The fixing pile 22 and the fixing sleeve 26 are both elliptical, and the fixing pile 22 is adapted to the fixing sleeve 26. Only when the fixing frame 23 is at 0° or 180°, the elliptical fixing pile 22 and the fixing sleeve 26 will be engaged, and therefore the state of the fixing frame 23 can be limited to only be facing up with the front side or facing up with the back side, and these two states correspond to the two magnet pieces 24 being in a state of repulsion or attraction, respectively.

[0037] Preferably, the rotating shaft 11 is fixedly connected to the outside of the rod body in the shell 1 with a sleeve 2, and the connecting bar 9 is fixedly connected to the sleeve 2. The sleeve 2 is used to protect the rotating shaft 11 to prevent a number of counterweights 7 from compressing the rotating shaft 11 and causing deformation when the counterweights 7 are received. The end of the rotating shaft 11 away from the ratchet block 18 is connected to the driven wheel 13 through a key, and the bottom end of the side of the partition 12 away from the sleeve 2 is rotatably connected to a rotating rod 16. A rotating through hole is opened on the side of the shell 1 close to the partition 12, and one end of the rotating rod 16 extends to the outside of the shell 1 at the rotating through hole.

[0038] Preferably, the rotating rod 16 is located outside the rod body in the shell 1 and is connected to a driving wheel 17 through a key. The driving wheel 17 is meshed with the driven wheel 13, and the diameter of the driving wheel 17 is smaller than the diameter of the driven wheel 13. The driving wheel 17 with a smaller diameter is used to drive the driven wheel 13 with a larger diameter to rotate, which can achieve a labor-saving effect. One end of the rotating rod 16 outside the shell 1 is fixedly connected to a connecting rod 15, and a crank 14 is fixedly connected to one end of the connecting rod 15. The crank 14 is used to shake the rotating rod 16 to drive the driving wheel 17, which can further achieve a labor-saving effect. Therefore, the present device can not only break down the process of installing the counterweight 7 into parts to reduce labor intensity, but also ensure the labor-saving effect when the counterweight 7 is installed into the shell 1, thereby improving the convenience of using the device.

[0039] Preferably, the bottom end of the shell 1 is fixedly connected with a base 5, and a pick-up and release port is opened on one side of the shell 1, and the shell 1 is rotatably connected with a cover shell 6 at the pick-up and release port, and a groove is opened at one end of the cover shell 6, and the cover shell 6 is rotatably connected with a roller shaft 10 at the groove, and the cover shell 6 can support the connecting sleeve 8 and the connecting strip 9 through the roller shaft 10, and the rotation of the roller shaft 10 can facilitate the process of the connecting sleeve 8 and the connecting strip 9 being pulled into the shell 1, thereby ensuring the stability and safety of the counterweight 7 when it is installed in the shell 1, and the two ends of the outer side of the cover shell 6 are fixedly connected with support feet 601, and the middle part between the two support feet 601 is fixedly connected with a handle 602, and the support feet 601 can support the cover shell 6 when it is unfolded to ensure that the cover shell 6 has sufficient strength to support the counterweight 7, and the handle 602 is used for grasping the cover shell 6 when it is opened and closed.

[0040] Preferably, the counterweight 7 is made of cast iron, and one end of the counterweight 7 is fixedly connected to a handle 701, and one end of the handle 701 is fixedly connected to a hand guard. The handle 701 and the hand guard can facilitate the lifting of the counterweight 7. The counterweight 7 is cylindrical, so it can be easily installed in the connecting sleeve 8, and can move on the surface of the roller 10 when pulled.

[0041] Working principle: When testing the driving range of an electric vehicle under different load conditions, the housing 1 can be placed in the vehicle, the cover 6 can be opened, and the support legs 601 can be used to support the cover 6 so that it is in an open state;

[0042] Then, the knob 25 is pulled to extend the fixing frame 23 to the outside of the fixing box 4, and after the fixing frame 23 is flipped so that the magnetic poles of the two magnet pieces 24 on the side close to each other are different, the fixing frame 23 is pushed back into the fixing box 4. At this time, the two magnet pieces 24 are attracted to each other, so that the ratchet block 18 is stabilized in a state of being separated from the ratchet wheel 19, and the rotating shaft 11 can rotate freely.

[0043] In this case, the connecting strip 9 can be pulled out of the housing 1 and placed on the roller shaft 10, and then the corresponding number of counterweights 7 can be selected according to the load capacity required for the vehicle, and the counterweights 7 can be installed in the connecting sleeve 8; thereafter, the orientation of the fixing frame 23 needs to be adjusted again so that the magnetic poles of the two magnet pieces 24 on the side close to each other are the same, and at this time, the two magnet pieces 24 will repel each other, so that the ratchet block 18 and the ratchet wheel 19 can be maintained in a state of engagement;

[0044] After that, the crank 14 can be shaken to load the counterweight 7 into the housing 1. The crank 14 drives the rotating rod 16 to rotate through the connecting rod 15. The rotating rod 16 drives the driven wheel 13 to rotate through the driving wheel 17. The driven wheel 13 rotates the shaft 11 to drive the sleeve 2 to rotate. The sleeve 2 can pull the connecting strip 9 to roll up outside it, and at the same time roll up the connecting sleeve 8 together with the counterweight 7 to the outside, so as to complete the loading of the counterweight 7 into the housing 1.

[0045] In this process, the ratchet block 18 engages with the ratchet wheel 19 so that the ratchet wheel 19 can only rotate in one direction, so the rotating shaft 11 can only rotate in one direction to drive the sleeve 2 to rotate so as to reel in the connecting strip 9 and the counterweight 7, without causing the counterweight 7 to rotate in the opposite direction and fall due to the gravity of the counterweight 7;

[0046] After the balancing weight 7 is loaded, the excess connecting strip 9 can be inserted into the outer shell 1, and then the cover shell 6 is closed to ensure the safety and stability of the balancing weight 7. In this case, the balancing weight 7 can provide the vehicle with a fixed value of balancing weight, so as to facilitate the vehicle to carry out endurance tests under different balancing weight conditions.

[0047] Example 2

[0048] See attached Figure 6 The present application provides a load-bearing device for testing the driving range of an electric vehicle. Compared with Example 1, in order to make the installation of the counterweight 7 more stable, a plurality of protrusions 801 are fixedly connected to the inner wall of the connecting sleeve 8 at equal intervals. The material of the protrusions 801 is rubber. The protrusions 801 made of rubber material can increase the friction between the counterweight 7 and the connecting sleeve 8, thereby maintaining the stable state of the counterweight 7 after installation.

[0049] Working principle: After the counterweight 7 is installed in the connecting sleeve 8, the presence of the protrusion 801 can increase the friction between the two, thereby making the installation of the counterweight 7 more stable.

[0050] The above are only specific embodiments of the invention, but the protection scope of the invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the invention should be included in the protection scope of the invention. The protection scope of the invention should be based on the protection scope of the claims.

Claims

1. A load-bearing device for testing the driving range of an electric vehicle, comprising a housing (1), a cover (6) and a plurality of counterweights (7), characterized in that: A load-bearing mechanism, a traction mechanism and a protection mechanism are provided inside the housing (1); the load-bearing mechanism is used to install a counterweight (7); the traction mechanism is used to load the counterweight (7) into the housing (1); and the protection mechanism is used to protect the counterweight (7) during installation; The load-bearing mechanism comprises a plurality of connecting sleeves (8) and connecting strips (9), the connecting sleeves (8) and connecting strips (9) are arranged alternately and fixedly connected to each other, the connecting sleeves (8) are matched with the counterweight (7), the traction mechanism comprises a rotating shaft (11), the rotating shaft (11) is used to reel up the connecting sleeves (8) and the connecting strips (9), the protection mechanism comprises a ratchet block (18), a ratchet wheel (19) and a limiting assembly, the ratchet block (18) limits the rotation direction of the rotating shaft (11) by engaging the ratchet wheel (19), and the limiting assembly comprises two magnet pieces (24), and the two magnet pieces (24) control the lifting and lowering of the ratchet block (18) by repelling and attracting each other.

2. A load-carrying device for testing the driving range of an electric vehicle according to claim 1, characterized in that: A partition (12) is fixedly connected to one side of the interior of the shell (1); a circular through hole is provided in the middle of the plate body of the partition (12) and in the middle of a side of the shell (1) away from the partition (12); the rotating shaft (11) is rotatably connected to the shell (1) and the partition (12) at the two circular through holes; the ratchet (19) is keyed to one end of the rotating shaft (11) outside the shell (1); and a cover (3) is fixedly connected to the side wall of the shell (1) outside the ratchet (19).

3. The load-carrying equipment for testing the driving range of an electric vehicle according to claim 2, characterized in that: The bottom end of the cover shell (3) is provided with a rectangular opening, the ratchet block (18) is slidably connected to the cover shell (3) at the rectangular opening, and the bottom end of the ratchet block (18) is fixedly connected to a base (20), the bottom end of the cover shell (3) is fixedly connected to a fixing box (4) outside the rectangular opening, the bottom end of one side of the inner wall of the fixing box (4) is fixedly connected to a fixing sleeve (26), and the bottom end of the other side of the fixing box (4) is provided with a strip opening, and the fixing box (4) is provided with a fixing frame (23) at the strip opening, and the two magnet sheets (24) are respectively fixedly connected to the bottom end of the base (20) and the inner side of the fixing frame (23).

4. The load-carrying equipment for testing the driving range of an electric vehicle according to claim 3, characterized in that: Both sides of the fixing frame (23) are fixedly connected with connecting piles (21), one end of the two connecting piles (21) is respectively fixedly connected with a fixing pile (22) and a knob (25), the fixing box (4) is provided with a circular opening in the middle of the strip opening, the connecting pile (21) is matched with the circular opening, the knob (25) is located outside the fixing box (4), and the diameter of the knob (25) is larger than the diameter of the circular opening and the width of the strip opening, the fixing pile (22) and the fixing sleeve (26) are both elliptical, and the fixing pile (22) is matched with the fixing sleeve (26).

5. The load-carrying equipment for testing the driving range of an electric vehicle according to claim 2, characterized in that: The rotating shaft (11) is fixedly connected to the shaft sleeve (2) outside the rod body in the outer shell (1), the connecting strip (9) is fixedly connected to the shaft sleeve (2), the end of the rotating shaft (11) away from the ratchet block (18) is externally connected to a driven wheel (13) via a key, the bottom end of the side of the partition (12) away from the shaft sleeve (2) is rotatably connected to a rotating rod (16), a rotating through hole is opened on the side of the outer shell (1) close to the partition (12), and one end of the rotating rod (16) extends to the outside of the outer shell (1) at the rotating through hole.

6. The load-carrying equipment for testing the driving range of an electric vehicle according to claim 5, characterized in that: The rotating rod (16) is located outside the rod body in the housing (1) and is connected to a driving wheel (17) via a key. The driving wheel (17) is meshed with the driven wheel (13), and the diameter of the driving wheel (17) is smaller than the diameter of the driven wheel (13). One end of the rotating rod (16) outside the housing (1) is fixedly connected to a connecting rod (15), and one end of the connecting rod (15) is fixedly connected to a crank (14).

7. The load-carrying equipment for testing the driving range of an electric vehicle according to claim 1, characterized in that: The bottom end of the shell (1) is fixedly connected to a base (5), and a take-in / put-out opening is provided on one side of the shell (1). The shell (1) is rotatably connected to a cover shell (6) at the take-in / put-out opening. A groove is provided at one end of the cover shell (6), and a roller (10) is rotatably connected to the cover shell (6) at the groove. Support legs (601) are fixedly connected at both ends of the outer side of the cover shell (6), and a handle (602) is fixedly connected at the middle between the two support legs (601).

8. The load-carrying equipment for testing the driving range of an electric vehicle according to claim 1, characterized in that: The counterweight (7) is made of cast iron, and one end of the counterweight (7) is fixedly connected to a handle (701), and one end of the handle (701) is fixedly connected to a hand guard.

9. The load-carrying equipment for testing the driving range of an electric vehicle according to claim 1, characterized in that: A plurality of protrusions (801) are fixedly connected to the inner wall of the connecting sleeve (8) at equal intervals, and the material of the protrusions (801) is rubber.

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