Transfer device for photovoltaic support installation

Abstract

The invention provides a transfer device for photovoltaic support installation, and relates to the technical field of transfer devices for photovoltaic support installation, the transfer device comprises a vehicle body, a storage groove is formed in the vehicle body, supports are fixedly arranged on the two sides of the bottom of the vehicle body respectively, and a first supporting shaft and a second supporting shaft are rotationally arranged on the supports on the two sides of the lower portion of the vehicle body respectively; a supporting block is fixedly arranged on the side, close to the power wheels, of the vehicle body, a transmission shaft is rotatably inserted in the supporting block, the bottom end of the transmission shaft is connected with a reversing wheel, and a handrail is arranged on the side, away from the power wheels, of the vehicle body. The parts can be placed in the containing grooves, a support for transferring, a photovoltaic panel and the like can be erected on the upper portion of the vehicle body, and a first supporting shaft and a second supporting shaft are used for enabling triangular wheels and power wheels to rotate below the vehicle body correspondingly, so that the transferring device can adapt to different roads; and the transferred photovoltaic parts are conveyed to a destination in the driving process on a complex road section.

Description

Technical Field

[0001] The present invention relates to the technical field of transport devices for photovoltaic bracket installation, and in particular to a transport device for photovoltaic bracket installation. Background Art

[0002] Photovoltaic power generation is a green energy generation method that converts the energy of sunlight radiation into electrical energy for storage and use by installing solar panels. Photovoltaic power generation first requires sufficient sunlight. The dense number of high-rise buildings in cities and towns is not conducive to the lighting of photovoltaic power generation devices, while the vast remote suburbs or villages can meet this demand. Secondly, the installation of photovoltaic power generation requires the photovoltaic panels to be supported by a fixed frame and installed at a suitable lighting angle.

[0003] Generally, for large-scale installation of photovoltaic power generation devices in villages, it is necessary to transport the fixing frame and other materials and parts to the installation site by truck, and the materials need to be manually transferred to each specific installation location. Because the materials are large and have a certain quality, a cart is usually used for the transportation work at the last end of the journey. The rural roads are relatively dilapidated, and it is inevitable to encounter some step-like obstacles when using a cart, which makes the cart unable to move forward normally. Roadside bumps may also cause the fixing frame and some parts placed on the cart to fall off during transportation, which brings a lot of inconvenience to the transportation at the last end of the journey. Therefore, a more convenient photovoltaic fixing frame installation transfer device is needed. Summary of the invention

[0004] The present invention provides a transport device for installing a photovoltaic bracket, which is used to solve the defects in the prior art.

[0005] The present invention provides a transport device for installing a photovoltaic bracket, comprising: a vehicle body, a storage groove is opened in the vehicle body, supports are fixedly arranged on both sides of the bottom of the vehicle body, a first support shaft and a second support shaft are rotatably arranged on the supports on both sides below the vehicle body, triangular wheels are rotatably arranged at both ends of the No. 1 support shaft, power wheels are rotatably arranged at both ends of the No. 2 support shaft, a support block is fixedly arranged on the side of the vehicle body close to the power wheel, a transmission shaft is rotatably inserted on the support block, a reversing wheel is connected to the bottom end of the transmission shaft, and a handrail is arranged on the side of the vehicle body away from the power wheel.

[0006] Preferably, the vehicle body is connected to one side of the top end of the storage slot and is provided with a plurality of grooves, the vehicle body is connected to a support column in the groove, the outer side of the support column is connected with an elastic band wound layer by layer, the vehicle body is connected to the groove and is provided with a rotary spring matching with both ends of the support column, the elastic band extends from one end away from the support column to above the groove and is connected with a snap ring, and the vehicle body is connected to a side of the storage slot away from the groove and is provided with a plurality of hooks matching with the snap rings.

[0007] Preferably, a fixing frame 1 is provided at the bottom of the vehicle body, a No. 1 motor is provided in the fixing frame, the No. 1 motor is drivingly connected to the No. 2 support shaft, a No. 2 motor is fixedly provided on the top of the support block, the No. 2 motor is drivingly connected to the transmission shaft, a fixing frame 2 is sleeved on the No. 2 motor, and the fixing frame 2 is connected to the support block.

[0008] Preferably, the armrest is connected with a plurality of control buttons, and the plurality of control buttons are electrically connected to the No. 1 motor and the No. 2 motor respectively.

[0009] Preferably, a rubber pad matching with the elastic band is connected to the vehicle body at the top end of the groove.

[0010] Preferably, it also includes:

[0011] Angle detection module, used to measure the angle between the bottom of the vehicle body and the horizontal direction when climbing a slope;

[0012] The pressure detection module is used to measure the thrust exerted on the handrail;

[0013] A calculation module 1 is used to calculate the power safety factor of the first motor based on the angle between the transfer device and the horizontal direction when climbing a slope;

[0014] An alarm module, used for issuing an alarm;

[0015] A processing module, used for comparing the power safety factor of motor No. 1 obtained by the calculation module 1 with 1;

[0016] Control module, when the power safety factor of motor No. 1 is greater than 1, the safety factor of motor No. 1 meets the standard, and the transfer device driven by motor No. 1 is used to safely transfer the photovoltaic bracket, and the transfer device continues to be used normally. When the power safety factor of motor No. 1 is less than or equal to 1, the safety factor of motor No. 1 meets the standard, and the drive of the transfer device by motor No. 1 is unsafe. The alarm module sounds an alarm, and at the same time prohibits the use of the transfer device to continue the transfer work and the transfer device is inspected and adjusted.

[0017] Preferably, the calculation module 1 calculates based on the following formula 1:

[0018]

[0019] K is the power safety factor of motor No. 1, n is the maximum speed of motor No. 1, i is the transmission ratio of motor No. 1, π is the pi, d1 is the radius of the power wheel, μ is the rolling friction coefficient of the reversing wheel and the power wheel, g is the gravity acceleration, G is the deadweight of the transfer device, Z is the maximum load of the transfer device, θ is the angle between the transfer device and the horizontal direction when climbing, a is the acceleration, F is the thrust exerted on the handrail, B is the width of the reversing wheel, S is the adhesion coefficient between the reversing wheel and the power wheel and the road surface, d2 is the length of the transmission shaft, d3 is the rotation radius of the reversing wheel, and P is the rated power of motor No. 1;

[0020] When K is greater than 1, the safety factor of motor No. 1 meets the standard and motor No. 1 meets the technical requirements;

[0021] When K is less than or equal to 1, the safety factor of motor No. 1 meets the standard and motor No. 1 does not meet the technical requirements.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The transfer device is mainly improved on the basic trolley. The device is equipped with a storage box at the storage position of the vehicle body, which can be used to place smaller parts, tools, etc., and provide a box to prevent them from falling. Secondly, the vehicle body is equipped with an elastic belt, which can bundle and fix larger materials and parts such as brackets mounted on the vehicle body for transportation, to prevent parts from falling due to bumps in the vehicle body during transportation. Finally, the wheels of the vehicle body are respectively equipped with reversing, power supply and climbing functions, which are convenient for people to use the device, reduce transportation obstacles caused by terrain, and can be operated more easily and flexibly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the overall structure provided by an embodiment of the present invention;

[0026] Figure 2 is a schematic cross-sectional view of the overall structure provided by an embodiment of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of Part A;

[0028] Figure 4 It is a schematic diagram of the structure of Part B;

[0029] Figure 5 It is a schematic diagram of the structure of part C.

[0030] Reference numerals:

[0031] 1. Car body; 2. Storage slot; 3. Support; 4. Support shaft No. 1; 5. Triangular wheel; 6. Support shaft No. 2; 7. Power wheel; 8. Motor No. 1; 9. Fixed frame No. 1; 10. Support block; 11. Transmission shaft; 12. Reversing wheel; 13. Motor No. 2; 14. Armrest; 15. Control button; 16. Groove; 17. Rotation spring; 18. Support column; 19. Elastic belt; 20. Snap ring; 21. Hook; 22. Rubber pad; 23. Fixed frame No. 2. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0034] The present invention provides the following embodiments

[0035] Example 1

[0036] The embodiment of the present invention provides a transport device for installing a photovoltaic bracket, such as Figure 1-Figure 5As shown, it includes: a vehicle body 1, a storage groove 2 is opened in the vehicle body 1, supports 3 are fixedly arranged on both sides of the bottom of the vehicle body 1, a No. 1 support shaft 4 and a No. 2 support shaft 6 are rotatably arranged on the supports 3 on both sides below the vehicle body 1, triangular wheels 5 are rotatably arranged at both ends of the No. 1 support shaft 4, and power wheels 7 are rotatably arranged at both ends of the No. 2 support shaft 6, a support block 10 is fixedly arranged on the side of the vehicle body 1 close to the power wheel 7, a transmission shaft 11 is rotatably inserted on the support block 10, a reversing wheel 12 is connected to the bottom end of the transmission shaft 11, and an armrest 14 is arranged on the side of the vehicle body 1 away from the power wheel 7.

[0037] The working principle and beneficial effects of the above technical solution are as follows: the vehicle body 1 is used to complete the transportation of photovoltaic brackets and other components by pushing a trolley. A storage groove 2 is connected to the top of the vehicle body 1, which can be used to place some small parts that need to be transported in the storage groove 2. The transport brackets and photovoltaic panels can be set up above the vehicle body 1. A support 3 is connected to the bottom of the vehicle body 1 for stably supporting the vehicle body 1. A No. 1 support shaft 4 and a No. 2 support shaft 6 that cooperate with the support 3 are rotatably connected on both sides below the vehicle body 1, and are respectively used to rotate the triangular wheels 5 and the power wheels 7 under the vehicle body 1. The two ends of the No. 1 support shaft 4 are connected to triangular wheels 5 for the convenience of the vehicle body 1 to climb the steps, and the two ends of the No. 2 support shaft 6 are connected to power wheels 7 for the convenience of the vehicle body 1 to move through electric power assistance, so that the transport device can adapt to different roads and deliver the transported photovoltaic parts to the destination during driving on complex roads.

[0038] Example 2

[0039] On the basis of Example 1, Figure 1-Figure 5 As shown, the vehicle body 1 is connected to a plurality of grooves 16 on one side of the top of the storage groove 2, the vehicle body 1 is connected to a support column 18 in the groove 16, the outer side of the support column 18 is connected with an elastic band 19 wound layer by layer, the vehicle body 1 is connected to a rotation spring 17 matched with both ends of the support column 18 in the groove 16, the elastic band 19 extends to the top of the groove 16 away from the support column 18 and is connected with a snap ring 20, and the vehicle body 1 is connected to a plurality of hooks 21 matched with the snap ring 20 on the side of the storage groove 2 away from the groove 16.

[0040] The vehicle body 1 is connected to a top end of the groove 16 with a rubber pad 22 that matches the elastic band 19 .

[0041] The working principle and beneficial effects of the above technical solution are as follows: the vehicle body 1 is connected to one side of the top of the storage box with a plurality of grooves 16, the vehicle body 1 is connected to a support column 18 in the groove 16 for retracting and releasing an elastic belt 19, the outer side of the support column 18 is connected to an elastic belt 19 for binding and fixing the bracket and other parts on the vehicle body 1, the elastic belt 19 is wound around the outer side of the support column 18 layer by layer, the vehicle body 1 is connected to a return spring 17 matched with the support column 18 in the groove 16, the elastic belt 19 is increased in resilience when the elastic belt 19 is bound, the fixing effect is enhanced, and the elastic belt 19 is also provided in the groove 16. The elastic band 19 automatically retracts into the groove 16 when not in use. The elastic band 19 extends from one end of the support column 18 to the top of the groove 16 and is connected to a snap ring 20. The vehicle body 1 is located on the side of the storage box away from the groove 16 and is connected to a plurality of hooks 21 that cooperate with the snap ring 20. The snap ring 20 cooperates with the hook 21 to facilitate fixing and bundling the transported brackets, electrical panels and other components to the vehicle body 1. The vehicle body 1 is located at the top of the groove 16 and is connected to a rubber pad 22 that cooperates with the elastic band 19 to prevent the elastic band 19 from rubbing against the vehicle body 1 when entering and exiting the groove 16, thereby causing damage to the elastic band 19.

[0042] Example 3

[0043] On the basis of Example 2, Figure 1-Figure 5 As shown, a fixing frame 9 is provided at the bottom of the vehicle body 1, a No. 1 motor 8 is provided in the fixing frame, and the No. 1 motor 8 is transmission-connected to the No. 2 support shaft 6, a No. 2 motor 13 is fixedly provided on the top of the support block 10, and the No. 2 motor 13 is transmission-connected to the transmission shaft 11, a fixing frame 23 is sleeved on the No. 2 motor 13, and the fixing frame 23 is connected to the support block 10,

[0044] The armrest 14 is connected with a plurality of control buttons 15, and the plurality of control buttons 15 are electrically connected to the first motor 8 and the second motor 13 respectively.

[0045] The armrest 14 is connected with a plurality of control buttons 15 , and the plurality of control buttons 15 are electrically connected to the first motor 8 and the second motor 13 respectively.

[0046] The working principle and beneficial effects of the above technical solution are as follows: the vehicle body 1 fixes the fixing frame 9, the fixing frame 9 fixes the No. 1 motor 8, the No. 1 motor 8 drives the No. 2 support shaft 6 to rotate, and the No. 1 motor 8 matched with the No. 2 support shaft 6 is connected to the lower part of the vehicle body 1 to provide power for the rotation of the No. 2 support shaft 6, and the vehicle body 1 is connected to a support block 10 on the side close to the power wheel 7, and the support block 10 is rotatably connected to a transmission shaft 11, and the bottom end of the transmission shaft 11 is connected to a reversing wheel 12, which is convenient for the vehicle body 1 to move The forward direction is adjusted when the support block 10 is connected to a No. 2 motor 13 that matches the transmission shaft 11 to provide power for the rotation of the transmission shaft 11. The vehicle body 1 is connected to a plurality of brackets that respectively match the No. 1 motor 8 and the No. 2 motor 13 to fix each motor on the vehicle body 1. A handrail 14 is connected to the side of the vehicle body 1 away from the power wheel 7 to facilitate the transport personnel to hold and push the vehicle body 1. A plurality of control buttons 15 are connected to the handrail 14 to control and adjust the operation of the power wheel 7 and the reversing wheel 12.

[0047] Example 4

[0048] On the basis of Example 3, the invention further includes:

[0049] An angle detection module, used to measure the angle between the bottom of the vehicle body 1 and the horizontal direction when climbing a slope;

[0050] A pressure detection module, used to measure the thrust exerted on the handrail 14;

[0051] A calculation module 1, for calculating the power safety factor of the first motor 8 based on the angle between the transfer device and the horizontal direction when climbing a slope;

[0052] An alarm module, used for issuing an alarm;

[0053] A processing module, used for comparing the power safety factor of the Ah motor 8 obtained by the calculation module 1 with 1;

[0054] Control module, when the power safety factor of motor No. 8 is greater than 1, the safety factor of motor No. 8 meets the standard, and the transfer device driven by motor No. 8 is used to safely transfer the photovoltaic bracket, and the transfer device continues to be used normally. When the power safety factor of motor No. 8 is less than or equal to 1, the safety factor of motor No. 8 meets the standard, and the drive of the transfer device by motor No. 8 is unsafe, the alarm module sounds an alarm, and at the same time prohibits the use of the transfer device to continue the transfer work and the transfer device is inspected and adjusted.

[0055] The working principle and beneficial effects of the above technical scheme are as follows: the angle detection module in the device is used to measure the angle between the bottom of the vehicle body 1 and the horizontal direction when climbing a slope, the pressure detection module is used to measure the thrust exerted on the handrail 14, the calculation module calculates the power safety factor of the No. 1 motor 8 based on the angle between the transfer device and the horizontal direction when climbing a slope, the alarm module is used to issue an alarm, and the processing module is used to compare the power safety factor of the No. 1 motor 8 obtained by the calculation module with 1. When the power safety factor of the No. 1 motor 8 is greater than 1, the safety factor of the No. 1 motor 8 meets the standard, and the transfer device driven by the No. 1 motor 8 is used to safely transfer the photovoltaic bracket, and the transfer device continues to be used normally. When the power safety factor of the No. 1 motor 8 is less than or equal to 1, the safety factor of the No. 1 motor 8 meets the standard, and the driving of the transfer device by the No. 1 motor 8 is unsafe. The control module controls the alarm module to issue an alarm, and at the same time prohibits the use of the transfer device to continue the transfer work and performs maintenance and adjustment on the transfer device.

[0056] Example 5

[0057] Based on Example 4, the calculation module 1 calculates based on the following formula 1:

[0058]

[0059] K is the power safety factor of the No. 1 motor 8, n is the maximum speed of the No. 1 motor 8, i is the transmission ratio of the No. 1 motor 8, π is the pi, d1 is the radius of the power wheel 7, μ is the rolling friction coefficient of the reversing wheel 12 and the power wheel 7, g is the gravity acceleration, G is the dead weight of the transfer device, Z is the maximum load of the transfer device, θ is the angle between the transfer device and the horizontal direction when climbing, a is the acceleration, F is the thrust exerted on the handrail 14, B is the width of the reversing wheel 12, S is the adhesion coefficient between the reversing wheel 12 and the power wheel 7 and the road surface, d2 is the length of the transmission shaft 11, d3 is the rotation radius of the reversing wheel 12, and P is the rated power of the No. 1 motor 8;

[0060] When K is greater than 1, the safety factor of motor 8 No. 1 meets the standard and motor 8 No. 1 meets the technical requirements;

[0061] When K is less than or equal to 1, the safety factor of motor No. 8 is up to standard, and motor No. 8 does not meet the technical requirements.

[0062] The working principle and beneficial effect of the above technical solution are as follows: the driving force required by the transfer device when fully loaded is calculated by μg(G+Z)sinθ+μg(G+Z)cosθ+(G+Z)a, and the driving force required by the transfer device when fully loaded is calculated by Calculate the steering friction that the transfer device must overcome, Calculate the driving force required for the transport device when the person applies partial force, by Calculate the driving power required by the No. 1 motor 8 for the transfer device under full load, by Calculate the power safety factor of motor 8. When the power safety factor of motor 8 is greater than 1, the safety factor of motor 8 meets the standard, and the transfer device driven by motor 8 is used to safely transfer the photovoltaic bracket, and the transfer device continues to be used normally. When the power safety factor of motor 8 is less than or equal to 1, the safety factor of motor 8 meets the standard, and the drive of the transfer device by motor 8 is unsafe. The control module controls the alarm module to sound an alarm, and at the same time prohibits the use of the transfer device to continue the transfer work and performs maintenance and adjustments on the transfer device.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A transport device for photovoltaic bracket installation, characterized in that: include: A vehicle body (1), wherein a storage groove (2) is provided in the vehicle body (1), supports (3) are fixedly provided on both sides of the bottom of the vehicle body (1), a first support shaft (4) and a second support shaft (6) are rotatably provided on the supports (3) on both sides below the vehicle body (1), triangular wheels (5) are rotatably provided at both ends of the first support shaft (4), and power wheels (7) are rotatably provided at both ends of the second support shaft (6), a support block (10) is fixedly provided on the side of the vehicle body (1) close to the power wheel (7), a transmission shaft (11) is rotatably inserted on the support block (10), a reversing wheel (12) is connected to the bottom end of the transmission shaft (11), and a handrail (14) is provided on the side of the vehicle body (1) away from the power wheel (7).

2. A photovoltaic support installation transfer device according to claim 1, characterized in that: The vehicle body (1) is connected to a plurality of grooves (16) on one side of the top of the storage groove (2); the vehicle body (1) is connected to a support column (18) in the groove (16); the outer side of the support column (18) is connected to an elastic band (19) wound layer by layer; the vehicle body (1) is connected to a rotation spring (17) matching with both ends of the support column (18) in the groove (16); the elastic band (19) extends from one end of the support column (18) to the top of the groove (16) and is connected to a snap ring (20); and the vehicle body (1) is connected to a plurality of hooks (21) matching with the snap ring (20) on the side of the storage groove (2) away from the groove (16).

3. A photovoltaic support installation transfer device according to claim 2, characterized in that: A fixing frame 1 (9) is arranged at the bottom of the vehicle body (1), a No. 1 motor (8) is arranged inside the fixing frame, the No. 1 motor (8) is connected to the No. 2 support shaft (6) in a transmission manner, a No. 2 motor (13) is fixedly arranged on the top of the support block (10), the No. 2 motor (13) is connected to the transmission shaft (11), a fixing frame 2 (23) is sleeved on the No. 2 motor (13), and the fixing frame 2 (23) is connected to the support block (10).

4. A photovoltaic support installation transfer device according to claim 3, characterized in that: The armrest (14) is connected with a plurality of control buttons (15), and the plurality of control buttons (15) are electrically connected to the first motor (8) and the second motor (13) respectively.

5. A photovoltaic support installation transfer device according to claim 4, characterized in that: The vehicle body (1) is connected to a top end of the groove (16) and is provided with a rubber pad (22) that matches the elastic band (19).

6. A photovoltaic support installation transfer device according to claim 5, characterized in that: Also includes: An angle detection module, used to measure the angle between the bottom of the vehicle body (1) and the horizontal direction when climbing a slope; A pressure detection module, used to measure the thrust exerted on the handrail (14); A calculation module 1, used for calculating the power safety factor of the first motor (8) based on the angle between the transfer device and the horizontal direction when climbing a slope; An alarm module, used for issuing an alarm; A processing module, used for comparing the power safety factor of the first motor (8) obtained by the calculation module 1 with 1; The control module, when the power safety factor of the No. 1 motor (8) is greater than 1, the safety factor of the No. 1 motor (8) meets the standard, the transfer device driven by the No. 1 motor (8) is used to safely transfer the photovoltaic bracket, and the transfer device continues to be used normally; when the power safety factor of the No. 1 motor (8) is less than or equal to 1, the safety factor of the No. 1 motor (8) does not meet the standard, the driving of the transfer device by the No. 1 motor (8) is unsafe, the alarm module sends out an alarm, and at the same time prohibits the use of the transfer device to continue the transfer work and performs maintenance and adjustment on the transfer device.

7. A photovoltaic support installation transfer device according to claim 6, characterized in that: The calculation module 1 calculates based on the following formula 1: K is the power safety factor of the first motor (8), n is the maximum speed of the first motor (8), i is the transmission ratio of the first motor (8), π is the pi, d1 is the radius of the power wheel (7), μ is the rolling friction coefficient of the reversing wheel (12) and the power wheel (7), g is the gravity acceleration, G is the deadweight of the transfer device, Z is the maximum load of the transfer device, θ is the angle between the transfer device and the horizontal direction when climbing a slope, a is the acceleration, F is the thrust exerted on the handrail (14), B is the width of the reversing wheel (12), S is the adhesion coefficient between the reversing wheel (12) and the power wheel (7) and the road surface, d2 is the length of the transmission shaft (11), d3 is the rotation radius of the reversing wheel (12), and P is the rated power of the first motor (8); When K is greater than 1, the safety factor of the No. 1 motor (8) meets the standard, and the No. 1 motor (8) meets the technical requirements; When K is less than or equal to 1, the safety factor of the No. 1 motor (8) is up to standard, and the No. 1 motor (8) does not meet the technical requirements.

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