Motor drive assembly and transport vehicle

Abstract

The present invention discloses a motor drive assembly and a transport vehicle, comprising two groups of wheel hub motor groups, the two groups of wheel hub motor groups are respectively arranged on the front and rear sides of a vehicle body; each two groups of wheel hub motor groups include a side-mounted motor, a wheel hub and a reducer housing, the side-mounted motor is fixedly connected to the wheel hub, the reducer housing is connected to the wheel hub, a cooling pipe is arranged inside the reducer housing, one end of the cooling pipe is connected to a water pipe 1; the cooling pipe forms a curved shape in the reducer housing, a temperature sensor 1 is fixed inside the reducer housing; a vehicle body and a control system, the water pipe 1 is connected to a central pipe, a water pipe 2 is connected between the other end of the cooling pipe and a water tank, and each group of the water pipes 2 is connected to a first pump body; a first valve, a second valve, a third valve and a fourth valve are respectively fixed around the central pipe. The present invention has the characteristics of strong practicality and rapid cooling.

Description

Technical Field

[0001] The invention relates to the technical field of motor drive assemblies of transport vehicles, and in particular to a motor drive assembly and a transport vehicle. Background Art

[0002] With the development of social economy and the advancement of science and technology, in the fields of warehousing and freight, in order to reduce the workload of workers and improve efficiency and reliability, people have developed various auxiliary and autonomous transport vehicles and robots.

[0003] The power performance, running speed, and carrying capacity of the transporter are closely related to the motor drive assembly. The power of the motor determines the maximum carrying capacity and running speed of the transporter, and the motor is prone to high temperature when in use.

[0004] Continuous high temperature environment will accelerate the aging and damage of various components of the motor drive system. The motor winding insulation material is prone to aging, becoming brittle and losing insulation performance under high temperature. Once the insulation is damaged, it may cause the motor to short-circuit, causing electrical fires and other safety accidents. This phenomenon has become a problem that people in this field need to solve urgently. Summary of the invention

[0005] The object of the present invention is to provide a motor drive assembly and a transport vehicle to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a motor drive assembly and a transport vehicle, comprising two sets of wheel hub motor groups, the two sets of wheel hub motor groups are respectively arranged on the front and rear sides of the vehicle body;

[0007] Each of the two groups of wheel hub motor groups comprises a side-mounted motor, a wheel hub and a reducer housing, wherein the side-mounted motor is fixedly connected to the wheel hub, the reducer housing is connected to the wheel hub, a cooling pipe is arranged inside the reducer housing, and one end of the cooling pipe is connected to a water pipe 1;

[0008] The cooling pipe forms a bent shape in the reducer housing, and a temperature sensor 1 is fixed inside the reducer housing.

[0009] According to the above technical solution, the vehicle body and control system, a bracket is fixed on the top of the vehicle body, a mounting cylinder is fixed in the middle of the bracket, and a first drive and a water tank are fixed on the bottom of the vehicle body;

[0010] A central pipe is arranged around the bottom of the vehicle body, the water pipe 1 is connected to the central pipe, the other end of the cooling pipe is connected to the water tank with a water pipe 2, and each group of the water pipes 2 is connected to a first pump body;

[0011] The central tube is respectively fixed with a first valve, a second valve, a third valve and a fourth valve around it;

[0012] A plurality of nozzles are arranged on one side of the central pipe close to the hub motor group.

[0013] According to the above technical solution, two groups of partitions are arranged inside the water tank, a cooling chamber 1 is formed between one group of partitions and the water tank, a cooling chamber 2 is formed between one group of partitions and the other end of the water tank, a preparatory chamber is formed between the two groups of partitions, and a cooler is fixed inside the preparatory chamber.

[0014] According to the above technical solution, temperature sensor 2 is fixed on the partition close to the cooling chamber 1, and temperature sensor 3 is fixed on the partition close to the cooling chamber 2.

[0015] According to the above technical solution, each group of the partitions is fixed with a connecting pipe on one side of the preparatory chamber, one group of the connecting pipes runs through the interior of cooling chamber one, and the other group of the connecting pipes runs through the interior of cooling chamber two, and each group of the connecting pipes is connected to a fifth valve.

[0016] According to the above technical solution, a loop is formed between the wheel hub motor group on the front side of the vehicle body and the cooling chamber 1, and a loop is formed between the wheel hub motor group on the rear side of the vehicle body and the cooling chamber 2.

[0017] According to the above technical solution, the control system includes a time monitoring module and an adjustment module. The time monitoring module is used to determine the duration of temperature reduction in the reducer housing, and the adjustment module is used to perform heat exchange on the coolant in the water tank.

[0018] According to the above technical solution, the control system is electrically connected to temperature sensor 1, temperature sensor 2, temperature sensor 3, the first valve, the second valve, the third valve, the fourth valve, and the fifth valve.

[0019] According to the above technical solution, four sets of fans are fixed to the bottom of the vehicle body, and the fans are located above the reducer housing.

[0020] Compared with the prior art, the beneficial effects achieved by the present invention are: the present invention, by providing a cooling pipe, a central pipe, and a water tank, can control the temperature inside the motor drive assembly through water circulation, thereby increasing the service life of the hub motor group. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a side schematic diagram of the overall structure of the present invention;

[0024] Figure 3 The present invention Figure 2 A local enlarged schematic diagram of area A;

[0025] Figure 4 It is a two-dimensional schematic diagram of the reducer housing of the present invention;

[0026] Figure 5 It is a pipeline schematic diagram of the present invention;

[0027] Figure 6 It is a schematic diagram of a water tank of the present invention;

[0028] Figure 7 It is a schematic diagram of the central tube and the nozzle of the present invention;

[0029] In the figure: 1. Car body; 2. Fan; 3. Reducer housing; 4. Wheel hub; 5. Side-mounted motor; 6. Water tank; 7. First drive; 8. Bracket; 9. Mounting cylinder; 10. Rotating disk; 11. Handling robot arm; 12. Cooling pipe; 13. First pump body; 14. Water pipe one; 15. First valve; 16. Central pipe; 17. Second valve; 18. Cooling chamber one; 19. Cooling chamber two; 20. Preparation chamber; 21. Partition; 22. Cooler; 23. Connecting pipe; 24. Fifth valve; 25. Water pipe two; 26. Fourth valve; 27. Third valve; 28. Temperature sensor one; 29. ​​Temperature sensor two; 30. Temperature sensor three; 31. Nozzle. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0031] See also Figure 1-7 The present invention provides a technical solution: a transport vehicle, including a body 1 and a control system, a bracket 8 is fixed on the top of the body 1, a mounting cylinder 9 is fixed in the middle of the bracket 8, a first drive 7 and a water tank 6 are fixed at the bottom of the body 1, a rotating disk 10 is fixed at the output end of the first drive 7, the rotating disk 10 is located above the mounting cylinder 9, and a transport mechanical arm 11 is fixed above the mounting cylinder 9. Starting the first drive 7 drives the rotating disk 10 to rotate, thereby driving the transport mechanical arm 11 to rotate on the body 1 to transport materials to the body 1.

[0032] A central tube 16 is arranged around the bottom of the vehicle body 1, and a motor drive assembly is arranged at the bottom of the vehicle body 1.

[0033] A first valve 15 , a second valve 17 , a third valve 27 and a fourth valve 26 are fixed around the central tube 16 .

[0034] Two groups of partitions 21 are arranged inside the water tank 6, a cooling chamber 18 is formed between one group of partitions 21 and the water tank 6, a cooling chamber 2 19 is formed between one group of partitions 21 and the other end of the water tank 6, a preparatory chamber 20 is formed between the two groups of partitions 21, and a cooler 22 is fixed inside the preparatory chamber 20.

[0035] A temperature sensor 29 is fixed on the partition 21 on the side close to the cooling chamber 1 18 , and a temperature sensor 3 30 is fixed on the partition 21 on the side close to the cooling chamber 2 19 .

[0036] Two groups of water pipes 25 are connected to the cooling chamber 1 18 , wherein two groups of water pipes 25 are connected to the cooling chamber 2 19 .

[0037] Each group of partitions 21 is fixed with a connecting pipe 23 on one side of the preparatory chamber 20 . One group of connecting pipes 23 runs through the interior of the first cooling chamber 18 , and the other group of connecting pipes 23 runs through the interior of the second cooling chamber 19 . Each group of connecting pipes 23 is connected to a fifth valve 24 .

[0038] The motor drive assembly includes two sets of wheel hub motor groups, which are respectively arranged on the front and rear sides of the vehicle body 1 (such as Figure 5 As shown in the figure, each of the two wheel hub motor groups includes a side-mounted motor 5, a wheel hub 4 and a reducer housing 3. The side-mounted motor 5 is fixedly connected to the wheel hub 4, and the reducer housing 3 is connected to the wheel hub 4. A cooling pipe 12 is arranged inside the reducer housing 3, and one end of the cooling pipe 12 is connected to a water pipe 14. The coolant is passed into the reducer housing 3 through the cooling pipe 12 to play a cooling role;

[0039] A water pipe 25 is connected between the other end of the cooling pipe 12 and the water tank 6. Each set of water pipes 25 is connected to a first pump body 13. The first pump body 13 is started to transfer the coolant in the water tank 6 to the inside of the reducer housing 3, and then enters the water pipe 1 14, and then enters the central pipe 16;

[0040] The water pipe 14 is connected to the central pipe 16;

[0041] It should be supplemented that a loop is formed between the wheel hub motor group on the front side of the vehicle body 1 and the cooling chamber 1 18 , and a loop is formed between the wheel hub motor group on the rear side of the vehicle body 1 and the cooling chamber 2 19 .

[0042] A temperature sensor 28 is fixed inside the reducer housing 3 to monitor the temperature of the reducer housing 3. The control system is electrically connected to the temperature sensor 28, the temperature sensor 29, the temperature sensor 30, the first valve 15, the second valve 17, the third valve 27, the fourth valve 26, and the fifth valve 24.

[0043] The control system includes a time monitoring module and an adjustment module. The time monitoring module is used to determine the duration of the temperature reduction in the reducer housing 3 , and the adjustment module is used to perform heat exchange on the coolant in the water tank 6 .

[0044] Four sets of fans 2 are fixed to the bottom of the vehicle body 1 , and the fans 2 are located above the reducer housing 3 .

[0045] A plurality of nozzles 31 are arranged on one side of the central pipe 16 close to the wheel hub motor group.

[0046] Embodiment 1:

[0047] In this embodiment, the motor drive assembly at the bottom of the transport vehicle is cooled by circulating the coolant to increase the service life of the motor drive assembly:

[0048] The material is transported to the vehicle body 1 by the transporting robot arm 11, and the motor drive assembly is started to control the movement of the vehicle body 1. During the movement, the temperature in the reducer housing 3 is detected by the temperature sensor 28 and transmitted to the control system. The staff sets the maximum temperature threshold value as a in the control system. When the temperature in one group of reducer housings 3 detected in real time is greater than or equal to a, it indicates that the temperature in the motor drive assembly is relatively high, and the temperature inside the motor drive assembly needs to be cooled down at this time;

[0049] Specifically, in the present embodiment, when the temperature in the front wheel hub motor group is set to be relatively high, the first pump body 13 on the left side of the front wheel hub motor group is started to extract the coolant in the cooling chamber 18 in the water tank 6 into the water pipe 2 25, and enter the cooling pipe 12 in the reducer housing 3 on the left side of the front wheel hub motor group. Since the cooling pipe 12 forms a curved shape in the reducer housing 3, the contact area between the cooling pipe 12 and the inner wall of the reducer housing 3 can be increased. Therefore, when the coolant is transmitted in the cooling pipe 12, it can better take away the heat of the motor drive assembly, and then enter the central pipe 16 along the water pipe 14, and then enter the cooling pipe 12 in the reducer housing 3 on the right side of the front wheel hub motor group, and then enter the cooling chamber 18 through the water pipe 2 25 on the right side, forming a loop to cool the front wheel hub motor group.

[0050] It should be added that when the temperature in the rear wheel hub motor group is greater than the set maximum threshold a, the above-mentioned cooling cycle method is used to cool the rear wheel hub motor group;

[0051] It should be noted that when the cooling operation is in progress, the first valve 15 and the third valve 27 are closed to block the central pipe 16, and the second valve 17 and the fourth valve 26 are opened at the same time to facilitate the connection of the pipelines of the front and rear wheel hub motor groups.

[0052] Through the above steps, the temperature inside the motor drive assembly can be controlled through water circulation, thereby increasing the service life of the hub motor unit.

[0053] Embodiment 2:

[0054] In this embodiment, the cooling time of the reducer housing 3 on the upper wheel hub motor unit is listed and identified to judge the cooling quality;

[0055] Specifically, when it is identified that the temperature in the upper reducer housing 3 is greater than the threshold value a, the time monitoring module starts timing Until the temperature in the reducer housing 3 returns to normal, the time monitoring module is marked as , set the normal cooling time as t in the control system, and the formula for determining the cooling time of the reducer housing 3 is: ,in The time for reducing the temperature of the reducer housing 3.

[0056] when When When , it means that the cooling time of the reducer housing 3 becomes longer. At this time, it is necessary to monitor the coolant temperature in the cooling chamber 18 through the temperature sensor 29 and transmit it to the control system, and set the maximum temperature threshold value as b in the control system. When the temperature in the cooling chamber 18 is lower than b, and the cooling time of the reducer housing 3 is normal, it means that the cooling state is normal. When the temperature in the cooling chamber 18 is lower than b, and the cooling time of the reducer housing 3 becomes longer, it means that the temperature of the front hub motor group is too high to be cooled. At this time, the second valve 17 is controlled to be closed by the control system to block the central pipe 16, so that the coolant is retained in the cooling pipe 12, thereby increasing the cooling time and improving the cooling efficiency.

[0057] When the temperature in the cooling chamber 18 is greater than b, the fifth valve 24 is opened through the control module, and the high-temperature liquid in the cooling chamber 18 is transmitted to the preparatory chamber 20 through the connecting pipe 23, and the cooler 22 is started to cool the liquid in the preparatory chamber 20. After the liquid is cooled, the liquid in the preparatory chamber 20 is pumped into the cooling chamber 18 through the pump body to exchange hot and cold liquids to ensure the cooling quality.

[0058] It should be added that when the cooling time in the rear wheel hub motor group is long, the above-mentioned liquid heat exchange method is used to improve the cooling quality.

[0059] When the temperatures inside the temperature sensor 3 30 and the temperature sensor 2 29 reach b at the same time, the fifth valve 24 is opened at the same time to transfer the coolant in the cooling chamber 1 18 and the cooling chamber 2 19 to the preparation chamber 20, and the coolant is cooled at the same time. Then, the coolant in the preparation chamber 20 is transferred to the cooling chamber 1 18 and the cooling chamber 2 19 at the same time, and the coolant in the two chambers is exchanged, so that the high-temperature liquids in the two chambers are diluted and cooled. When the liquid temperatures of the cooling chamber 1 18 and the cooling chamber 2 19 are lower than b after dilution, it means that the dilution is successful and can continue. Cooling, when the liquid temperature in cooling chamber 1 18 and cooling chamber 2 19 are both higher than b, and temperature sensor 1 28 detects in real time that the temperature of reducer housing 3 is higher than a, the nozzle 31 and fan 2 are turned on to spray the liquid in central tube 16 directly onto the hub motor unit, and fan 2 is turned on to cool the hub motor unit. Through this step, when the liquid temperature in cooling chamber 1 18 and cooling chamber 2 19 is still high after dilution, and the temperature in reducer housing 3 is high, the liquid is sprayed out, combined with air cooling, to cool the outside of the hub motor unit and improve the cooling efficiency.

[0060] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0061] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transport vehicle, using a motor drive assembly, comprising a vehicle body (1) and a control system, characterized in that: The motor drive assembly comprises two sets of wheel hub motor groups, and the two sets of wheel hub motor groups are respectively arranged on the front and rear sides of the vehicle body (1); Each of the two groups of wheel hub motor groups comprises a side-mounted motor (5), a wheel hub (4) and a reducer housing (3); the side-mounted motor (5) is fixedly connected to the wheel hub (4); the reducer housing (3) is connected to the wheel hub (4); a cooling pipe (12) is provided inside the reducer housing (3); one end of the cooling pipe (12) is connected to a water pipe (14); The cooling pipe (12) is formed into a bent shape in the reducer housing (3), and a temperature sensor 1 (28) is fixed inside the reducer housing (3); A bracket (8) is fixed on the top of the vehicle body (1), a mounting cylinder (9) is fixed in the middle of the bracket (8), and a first drive (7) and a water tank (6) are fixed on the bottom of the vehicle body (1); A central tube (16) is arranged around the bottom of the vehicle body (1), the water pipe 1 (14) is connected to the central tube (16), a water pipe 2 (25) is connected between the other end of the cooling pipe (12) and the water tank (6), and each group of the water pipes 2 (25) is connected to a first pump body (13); A first valve (15), a second valve (17), a third valve (27) and a fourth valve (26) are respectively fixed around the central tube (16); A plurality of nozzles (31) are arranged on one side of the central tube (16) close to the wheel hub motor group.

2. A transport vehicle according to claim 1, characterized in that: Two groups of partitions (21) are arranged inside the water tank (6); a cooling chamber 1 (18) is formed between one group of the partitions (21) and the water tank (6); a cooling chamber 2 (19) is formed between one group of the partitions (21) and the other end of the water tank (6); a preparatory chamber (20) is formed between the two groups of the partitions (21); a cooler (22) is fixed inside the preparatory chamber (20).

3. A transport vehicle according to claim 2, characterized in that: A second temperature sensor (29) is fixed on the partition (21) on the side close to the first cooling chamber (18), and a third temperature sensor (30) is fixed on the partition (21) on the side close to the second cooling chamber (19).

4. A transport vehicle according to claim 3, characterized in that: Each group of the partitions (21) is fixed with a connecting pipe (23) on one side of the preparation chamber (20); one group of the connecting pipes (23) passes through the interior of the first cooling chamber (18); the other group of the connecting pipes (23) passes through the interior of the second cooling chamber (19); and each group of the connecting pipes (23) is connected to a fifth valve (24).

5. A transport vehicle according to claim 4, characterized in that: A loop is formed between the wheel hub motor group on the front side of the vehicle body (1) and the first cooling chamber (18), and a loop is formed between the wheel hub motor group on the rear side of the vehicle body (1) and the second cooling chamber (19).

6. A transport vehicle according to claim 5, characterized in that: The control system comprises a time monitoring module and an adjustment module, the time monitoring module being used to determine the duration of temperature reduction in the reducer housing (3), and the adjustment module being used to perform heat exchange on the coolant in the water tank (6).

7. A transport vehicle according to claim 6, characterized in that: The control system is electrically connected to the temperature sensor 1 (28), the temperature sensor 2 (29), the temperature sensor 3 (30), the first valve (15), the second valve (17), the third valve (27), the fourth valve (26), and the fifth valve (24).

8. A transport vehicle according to claim 7, characterized in that: Four sets of fans (2) are fixed to the bottom of the vehicle body (1), and the fans (2) are located above the reducer housing (3).

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