阅读说明：本技术 一种多电机合成箱 (Multi-motor synthesis box ) 是由 任广福 王征 袁浩然 武旭根 龚丽萍 于 2021-09-06 设计创作，主要内容包括：本发明提供了一种多电机合成箱,属于汽车技术领域。它解决了现有技术中驱动电机总成体积大、重量重的问题。本多电机合成箱包括壳体,壳体内部具有至少两个安装室,每个安装室的内壁上分别固连有电机定子,每个电机定子内设有电机转子,每个电机转子的转轴上分别连接有主动齿轮,壳体上设有用于实现动力输出的输出齿轮,主动齿轮的直径小于输出齿轮的直径,各主动齿轮均与输出齿轮相啮合并共同驱动输出齿轮转动。本发明具有体积小、重量轻的优点,便于安装布置。(The invention provides a multi-motor synthesis box, and belongs to the technical field of automobiles. It has solved the problem that the driving motor assembly is bulky among the prior art, weight is heavy. This synthetic case of many motors includes the casing, and the casing is inside to have two at least installation rooms, has linked firmly motor stator on the inner wall of every installation room respectively, is equipped with motor rotor in every motor stator, is connected with the driving gear respectively in every motor rotor's the pivot, is equipped with the output gear who is used for realizing power take off on the casing, and the diameter of driving gear is less than output gear's diameter, and each driving gear all meshes with output gear mutually and drives output gear jointly and rotates. The invention has the advantages of small volume and light weight, and is convenient to install and arrange.)

1. The utility model provides a synthetic case of many motors, includes casing (1), its characterized in that, casing (1) inside has two at least installation rooms (1a), has linked firmly motor stator (2) on the inner wall of every installation room (1a) respectively, is equipped with motor rotor (3) in every motor stator (2), is connected with driving gear (4) on pivot (31) of every motor rotor (3) respectively, be equipped with output gear (5) that are used for realizing power take off on casing (1), the diameter of driving gear (4) is less than the diameter of output gear (5), and each driving gear (4) all mesh with output gear (5) mutually and drive output gear (5) jointly and rotate.

2. The multi-motor combination box according to claim 1, wherein an oil inlet passage (6) is formed in the housing (1), at least one cooling oil pipe (7) located at the top of each mounting chamber (1a) is arranged in each mounting chamber (1a), each cooling oil pipe (7) is communicated with the oil inlet passage (6), the length direction of each cooling oil pipe (7) is consistent with the axial direction of the motor stator (2), and a plurality of spraying holes (8) are formed in each cooling oil pipe (7) along the length direction of the cooling oil pipe.

3. The multiple motor synthesis box according to claim 2, wherein the number of the installation chambers (1a) is four, two of the installation chambers (1a) being upper installation chambers (1a1) and the other two installation chambers (1a) being lower installation chambers (1a2), two of the upper installation chambers (1a1) being disposed side by side in a horizontal direction at an upper portion of the housing (1), and two of the lower installation chambers (1a2) being disposed side by side in a horizontal direction at a lower portion of the housing (1).

4. The multi-motor composite box according to claim 3, wherein the housing (1) comprises a vertically arranged base plate (1b), four cylindrical mounting portions (1c) with openings at the rear ends are formed on the rear side surface of the base plate (1b), a rear end cover (1d) is respectively covered on each opening to form one mounting chamber (1a) in the interior of each lower mounting portion (1c), the number of the cooling oil pipes (7) in each mounting chamber (1a) is three, one of the cooling oil pipes is a first cooling oil pipe (71) located right above the corresponding motor stator (2), and the other two cooling oil pipes (7) are second cooling oil pipes (72) located respectively at the upper left and upper right of the corresponding motor stator (2).

5. The multi-motor combination box according to claim 4, wherein the oil inlet passage (6) is arranged on the base plate (1b), the oil inlet passage (6) comprises an upper transverse passage (61), an oil inlet transverse passage (62) and a lower transverse passage (63) which are sequentially arranged from top to bottom and are communicated with each other, one end of each of the four second cooling oil pipes (72) in the two upper mounting chambers (1a1) is communicated with the upper transverse passage (61), one end of each of the four second cooling oil pipes (72) in the two lower mounting chambers (1a2) is communicated with the lower transverse passage (63), the upper transverse passage (61) is further connected with two extending passages (64) extending upwards, and the two first cooling oil pipes (71) in the two upper mounting chambers (1a1) are respectively communicated with the two extending passages (64) in a one-to-one correspondence.

6. The multi-motor combination box according to claim 5, wherein two first oil passing holes (66) are formed in the side wall of the oil inlet transverse passage (62), one end of each of two first cooling oil pipes (71) in two lower mounting chambers (1a2) is inserted into the two first oil passing holes (66) in a one-to-one correspondence manner, four second oil passing holes (67) are formed in the side walls of the upper transverse passage (61) and the lower transverse passage (63), one end of each of four second cooling oil pipes (72) in the two upper mounting chambers (1a1) is inserted into the four second oil passing holes (67) of the upper transverse passage (61) in a one-to-one correspondence manner, and one end of each of the four second cooling oil pipes (72) in the two lower mounting chambers (1a2) is inserted into the four second oil passing holes (67) of the lower transverse passage (63) in a one-to-one correspondence manner.

7. The multi-motor composite box according to claim 5 or 6, wherein each rear end cover (1d) is provided with a rear supporting hole (1d1), the rear end of the rotating shaft (31) of the motor rotor (3) is connected to the corresponding rear supporting hole (1d1) through a rear bearing (9), the upper part of the rear end cover (1d) is provided with an oil guiding hole (1d2) with two ends penetrating along the radial direction, the opening at the upper end of the oil guiding hole (1d2) is located right below one of the spraying holes (8) on the first cooling oil pipe (71) in the corresponding mounting chamber (1a), and the opening at the lower end of the oil guiding hole (1d2) is located on the top side wall of the corresponding rear supporting hole (1d 1).

8. The multi-motor composite box according to claim 5 or 6, wherein front support holes (1b1) are respectively opened at positions of the base plate (1b) corresponding to the rotating shaft (31) of each motor rotor (3), the front ends of the rotating shafts (31) of the motor rotors (3) are respectively connected in the corresponding front support holes (1b1) through front bearings (10), bearing cooling oil holes (1b2) are respectively opened at positions of the base plate (1b) corresponding to each front support hole (1b1), the inlet ends of the bearing cooling oil holes (1b2) are communicated with the oil inlet passage (6), and the outlet ends of the bearing cooling oil holes (1b2) are positioned on the side wall of the corresponding front support holes (1b 1).

9. The multi-motor composite box according to claim 4, 5 or 6, wherein the housing (1) further comprises a front housing (1e), the front housing (1e) is fixedly connected to the front side surface of the base plate (1b) and forms a gear chamber (1f) with the front side surface of the base plate (1b), the output gear (5) and the driving gear (4) are both arranged in the gear chamber (1f), gear cooling oil pipes (11) capable of spraying lubricating oil are respectively arranged on the side portions of the gear chamber (1f) located on each driving gear (4), and each gear cooling oil pipe (11) is communicated with the oil inlet passage (6).

10. The multi-motor composite box according to claim 5 or 6, wherein an oil storage chamber (1g) is formed at the bottom of the housing (1), an oil inlet pipe joint (12) is connected to one end of the oil inlet transverse passage (62), an oil outlet pipe joint (13) is formed on the outer wall of the housing (1), and the multi-motor composite box further comprises an oil pump (14) capable of conveying lubricating oil in the oil storage chamber (1g) to the oil outlet pipe joint (13).

Technical Field

The invention belongs to the technical field of automobiles, and relates to a multi-motor synthesis box.

Background

The driving motor assembly is used as a core component of the commercial vehicle, and the performance of the commercial vehicle is directly determined by the design quality of the driving motor assembly. At present, a single high-power motor is generally adopted in a commercial vehicle, the structure of the motor is as disclosed in Chinese patent literature, the structure of the motor is a pure electric vehicle driving system and a driving motor oil cooling system (application number: 201910786540.X), the driving motor comprises a shell and a cooling system, the shell encloses an inner cavity, and a stator core and an end winding are arranged in the inner cavity. However, since the driving motor assembly of the commercial vehicle is different from a common passenger vehicle, the driving motor assembly of the commercial vehicle often needs to have a larger torque and power requirement, so that the diameter of the stator and the diameter of the rotor of the driving motor assembly adopted by the current commercial vehicle are often larger in order to meet the power requirement, and the rotor with larger diameter and heavier mass is difficult to realize higher rotating speed, so that the rotating speed range of the driving motor is low, the power density is not high, and the driving motor is not beneficial to providing higher power output in a relatively limited physical space, therefore, the single motor driving assembly of the current commercial vehicle becomes the requirement for realizing high power, and the driving motor assembly is usually very large in size, heavy in weight and difficult to flexibly arrange.

Disclosure of Invention

The invention aims to solve the problems of large volume and heavy weight of the conventional driving motor assembly on the premise of ensuring output power.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a synthetic case of many motors, includes the casing, its characterized in that, two at least installation rooms have in the casing inside, have linked firmly motor stator on the inner wall of every installation room respectively, are equipped with motor rotor in every motor stator, are connected with the driving gear in every motor rotor's the pivot respectively, be equipped with the output gear who is used for realizing power take off on the casing, the diameter of driving gear is less than output gear's diameter, and each driving gear all meshes with output gear mutually and drives output gear jointly and rotates.

This synthetic case of many motors mainly used is the drive of for example tractor of commercial car, and this device is through two at least installation rooms of shaping play in the casing inside for a plurality of spaces that can hold the motor alone have been constituted in the casing, on this basis, through linking firmly the stator on the inner wall of every installation room, and be equipped with electric motor rotor in every electric motor stator, make a plurality of motors integrated to on same big casing, and then be favorable to the compactification design of structure and realize subtracting the weight. In addition, a plurality of motors in the device drive the output gear to rotate together to realize power output, and on the premise of realizing equal output power, the output power required by each motor is lower, so that the diameter of a motor stator and the diameter of a motor rotor of a single motor can be greatly reduced, and the weight is greatly reduced; on the other hand, as the diameter of the driving gear is smaller than that of the output gear, each motor drives the output gear to rotate, and torque increasing transmission is realized. The rotational speed of every motor can be done very high for the factor in above two aspects to make great rotational speed range and power density can be realized to single motor, under the prerequisite that realizes equal output like this, compare in current single motor drive assembly, this many motor synthesis case can effectively reduce holistic size, and light in weight, can be convenient for arrange.

In the multi-motor combined box, the shell is provided with an oil inlet passage, each installation chamber is internally provided with at least one cooling oil pipe positioned at the top of the installation chamber, each cooling oil pipe is communicated with the oil inlet passage, the length direction of each cooling oil pipe is consistent with the axial direction of the motor stator, and the cooling oil pipe is provided with a plurality of spraying holes along the length direction. For the motor, when the temperature of the motor exceeds a certain value, heat is generated, a part of energy is wasted, the motor cannot work at full power, and the output power of the motor is reduced. And this device has adopted the structure that a plurality of motors integrate to same casing, though compact structure, has brought the poor problem of heat dissipation condition, and at the high-speed moving in-process of motor, every motor all can produce the heat, can form the stack of the heat of a plurality of motors in the casing, consequently, to this device, how to carry out effectual heat dissipation to the motor to avoid the overheated reduction of the output who brings of synthesis case, just seem more crucial and the design degree of difficulty also higher. Therefore, the oil inlet passage is arranged on the shell, the cooling oil pipe is arranged at the top of each installation chamber, the motor can continuously convey cooling oil to the cooling oil pipe when working, the cooling oil pipe can effectively dissipate heat of different positions of the motor stator through the plurality of spraying holes in the cooling oil pipe, and accordingly the problem that the output power is reduced due to overhigh temperature of the motor is effectively solved.

In the above-described multiple-motor composite case, the number of the mounting chambers is four, two of the mounting chambers are upper mounting chambers and the other two mounting chambers are lower mounting chambers, the two upper mounting chambers are arranged side by side in the horizontal direction at the upper portion of the case, and the two lower mounting chambers are arranged side by side in the horizontal direction at the lower portion of the case. The four installation chambers are arranged in a rectangular array, so that the device has a very compact structure and small volume and is convenient to arrange on the basis of realizing multi-motor arrangement. And, four motors participate in the drive jointly, have also guaranteed that this device can realize great output, satisfy the power demand of commercial car.

In foretell many motors synthetic case, the casing includes the base plate of vertical setting, the shaping has four to be cylindricly and the rear end has open installation portion on the trailing flank of base plate, covers respectively on each uncovered and is equipped with the rear end cap and makes the inside of every installation department down all form an foretell installation room, and the quantity of cooling oil pipe in every installation room is three, and one of them is for being located the first cooling oil pipe directly over the motor stator that corresponds, and two other cooling oil pipes are for being located the second cooling oil pipe of the upper left side and the upper right side of corresponding motor stator respectively. The installation department rear end has uncovered, conveniently carries out the installation of motor stator and motor rotor. The motor rotor and the motor stator are respectively installed through the four cylindrical installation parts, the four installation parts are arranged in a rectangular array mode, and due to the design, a weight-reducing hollow part can be formed between every two adjacent installation parts, so that the weight reduction of the shell is facilitated, and the device has better lightweight indexes. Moreover, because the inside installation chamber of installing motor stator and electric motor rotor that forms respectively of every installation department, such design can make motor stator and electric motor rotor simple to operate, is favorable to promoting the stability of installation moreover, and then guarantees that every motor homoenergetic stably carries out power take off, makes this many motors synthetic case have higher working property. The quantity of the cooling oil pipe in every installation room is three, and three cooling oil pipe are located motor stator directly over, upper left side and upper right side respectively for motor stator's cooling area increases, has promoted the cooling effect of motor greatly, and then makes this many motor synthesis case's output can guarantee.

In the above-mentioned multi-motor combination box, the oil inlet passageway is arranged on the substrate, the oil inlet passageway includes an upper transverse channel, an oil inlet transverse channel and a lower transverse channel which are arranged from top to bottom in sequence and are communicated with each other, one end of each of the four second cooling oil pipes in the two upper mounting chambers is communicated with the upper transverse channel, one end of each of the four second cooling oil pipes in the two lower mounting chambers is communicated with the lower transverse channel, the upper transverse channel is further connected with two extending channels which extend upwards, and the two first cooling oil pipes in the two upper mounting chambers are respectively communicated with the two extending channels in a one-to-one correspondence manner.

The upper transverse channel, the oil inlet transverse channel and the lower transverse channel are communicated through the vertically arranged vertical channels, the oil inlet transverse channel is used for being communicated with an oil outlet of an automobile oil cooler, and the oil cooler continuously conveys cooled lubricating oil into the oil inlet transverse channel and finally flows to the first cooling oil pipes and the second cooling oil pipes to cool the motor in the operation process of the multi-motor synthesis box. This device realizes the cooling of motor through set up cross channel, oil feed cross channel and cross channel down on the base plate, has effectively utilized the shared space of base plate self, compares in additionally setting up oil pipe and replaces each cross channel to carry out the structure that lubricating oil carried, and the oil feed route design structure of this device is more compact, is favorable to reducing the size and the weight of many motor synthesis casees. Moreover, each transverse channel, each vertical channel and each extension channel also form cooling to the base plate, so that the overall cooling effect of the device can be improved, the device can stably output power, and the output power is ensured.

In foretell many motors combination case, set up two first oilholes of crossing on the lateral wall of oil feed transverse channel, two lower installation indoor two first cooling oil pipe's one end one-to-one peg graft to two first oilholes in, four second oilholes of crossing have been seted up respectively on the lateral wall of last transverse channel and lower transverse channel, in four second cooling oil pipe's in the installation indoor one-to-one peg graft to four second oilholes of supreme transverse channel on two, in four second cooling oil pipe's in two lower installation indoor one end one-to-one peg graft to four second oilholes of lower transverse channel. Through set up first oilhole or second oilhole on the lateral wall of each transverse passage, not only realized the transport of lubricating oil, but also realized cooling oil pipe's installation, had the advantage that makes conveniently, with low costs. Preferably, in order to improve the mounting stability of the cooling oil pipes, a mounting piece is further arranged on the outer wall of the other end of each cooling oil pipe, a bolt hole is formed in each mounting piece, and each mounting piece penetrates through the bolt hole through an oil pipe bolt to be connected to the inner wall of each mounting portion.

In the multi-motor combined box, each rear end cover is provided with a rear supporting hole, the rear end of the rotating shaft of the motor rotor is connected into the corresponding rear supporting hole through a rear bearing, the upper part of the rear end cover is provided with an oil guide hole with two ends penetrating along the radial direction, an opening at the upper end of the oil guide hole is positioned right below one of the spraying holes on the first cooling oil pipe in the corresponding mounting chamber, and an opening at the lower end of the oil guide hole is positioned on the side wall of the top of the corresponding rear supporting hole.

The opening of leading oilhole upper end is located sprays the hole under for the lubricating oil that sprays the outflow of hole can get into and lead in the oilhole, then flows to back supporting hole through leading the oilhole in, dispels the heat and lubricate rear bearing. This design makes first cooling oil pipe can dispel the heat to motor and rear bearing simultaneously, and the design is very ingenious, satisfies many motors and synthesizes on the holistic lubricated and heat dissipation requirement's of case basis, can simplify the lubrication and the cooling system of this device, and then is favorable to reducing equipment cost.

In the above multi-motor combination box, the front support holes are respectively formed in the positions, corresponding to the rotating shaft of each motor rotor, on the base plate, the front ends of the rotating shafts of the motor rotors are respectively connected into the corresponding front support holes through front bearings, the bearing cooling oil holes are respectively formed in the positions, corresponding to the front support holes, on the base plate, the inlet ends of the bearing cooling oil holes are communicated with the oil inlet passage, and the outlet ends of the bearing cooling oil holes are located on the side walls of the corresponding front support holes.

Lubricating oil in the oil inlet passage has certain pressure, and through set up bearing cooling oilhole on the base plate for the bearing cooling oilhole can be lubricated the front bearing in can spraying lubricating oil to the fore-stock hole by force, guarantees that high-speed moving front bearing has better lubrication and cooling effect, and then has guaranteed that the motor can operate steadily and carry out power take off, guarantees output.

In foretell many motors synthetic case, the casing still includes the procapsid, the procapsid link firmly on the leading flank of base plate and with the leading flank of base plate between form the gear room, output gear and driving gear all set up in the gear room, the lateral part that is located every driving gear in the gear room still is equipped with the gear cooling oil pipe that can the blowout lubricating oil respectively, every gear cooling oil pipe all with the oil feed passageway is linked together.

The front shell is arranged to form the gear chamber, so that the driving gear and the output gear can operate in a relatively closed space, and pollution of external impurities is avoided. The gear cooling oil pipe capable of spraying lubricating oil is arranged on the side portion of each driving gear, and the output gears and the driving gears in the gear chamber are lubricated forcibly, so that the gears are operated in an efficient lubricating state all the time, and the multi-motor synthesis box is further ensured to stably output power and ensure output power.

In foretell many motors synthetic case, the bottom of casing has the oil storage chamber, and the one end of oil feed cross passage is connected with into oil pipe joint, be equipped with out oil pipe joint on the outer wall of casing, this many motors synthetic case still includes the oil pump that can carry the lubricating oil in the oil storage chamber to out oil pipe joint. The oil storage chamber is used for recovering lubricating oil which flows back from various lubricating and cooling parts. When the whole vehicle assembly is carried out, the oil outlet pipe joint is communicated with the oil inlet of the vehicle oil cooler through a pipeline, and meanwhile, the oil outlet of the oil cooler is communicated with the oil inlet pipe joint of the device. When the multi-motor synthesis box works, the oil pump can enable lubricating oil to flow to the oil outlet pipe joint, and then the lubricating oil flows to the oil inlet pipe joint after being cooled through the oil cooler to perform cooling and lubrication inside the multi-motor synthesis box. The oil pump structure can adopt a motor pump in the prior art, the inlet of the motor pump is communicated with the oil storage chamber through a pipeline, and the outlet of the motor pump is communicated with the oil outlet pipe joint through a pipeline. Or, the oil pump can also adopt a rotor type mechanical pump, the rotor of the mechanical pump is directly sleeved on the shaft neck part of the output gear, and the mechanical pump is driven to work through the output gear.

Compared with the prior art, the multi-motor synthesis box has the following advantages:

1. this synthetic case of many motors is through setting up a plurality of installation rooms in the casing for a plurality of motors are integrated to carry out power take off jointly in the casing, and this design not only can satisfy the power demand of commercial car, makes the synthetic case of many motors have small, light in weight's advantage moreover, and the scheme of a plurality of motors can be according to actual need adjustment motor mode and size of arranging, thereby the installation of being convenient for is arranged.

2. The motor in every installation room all can adopt the motor of passenger car, borrows the technique of passenger car motor to satisfy the electric drive demand of commercial car, and repeated development can be avoided to this design, and reduce cost is favorable to mass production moreover.

Drawings

Fig. 1 is a schematic perspective view of the multi-motor combination box.

Fig. 2 is a rear view of the present multiple motor synthesis box.

Fig. 3 is a cross-sectional view a-a of fig. 2.

Fig. 4 is a partial view of the housing.

Fig. 5 is a side view of the present multiple motor synthesis box.

Fig. 6 is a cross-sectional view a-a of fig. 5.

Fig. 7 is a sectional view of B-B in fig. 5.

Fig. 8 is a cross-sectional view of C-C in fig. 5.

Fig. 9 is a schematic view of the installation of the cooling oil pipe in the installation chamber.

Fig. 10 is a plan view of the present multiple motor combination box.

Fig. 11 is a cross-sectional view a-a of fig. 10.

Fig. 12 is an enlarged view at a in fig. 11.

Fig. 13 is a schematic structural view of the inside of the gear chamber.

In the figure, 1, a housing; 1a, an installation chamber; 1a1, upper mounting chamber; 1a2, lower mounting chamber; 1b, a substrate; 1b1, front support aperture; 1b2, bearing cooling oil hole; 1c, a mounting part; 1d, a rear end cover; 1d1, rear support hole; 1d2, oil guide hole; 1e, a front housing; 1f, a gear chamber; 1g, an oil storage chamber; 1h, positioning the groove.

2. A motor stator; 21. a connecting lug; 3. a motor rotor; 31. a rotating shaft; 4. a driving gear; 5. an output gear; 51. a splined bore.

6. An oil inlet passage; 61. an upper transverse channel; 62. an oil inlet transverse channel; 63. a lower transverse channel; 64. an extension channel; 65. a vertical channel; 66. a first oil passing hole; 67. the second oil passing hole.

7. Cooling the oil pipe; 71. a first cooling oil pipe; 72. a second cooling oil pipe.

8. Spraying holes; 9. a rear bearing; 10. a front bearing; 11. a gear cooling oil pipe; 12. An oil inlet pipe joint; 13. an oil outlet pipe joint; 14. an oil pump; 141. a rotor; 15. mounting a sheet; 16. an oil pipe bolt; 17. a motor bolt; 18. motor foot supporting seat.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

Example one

This many motors synthesis case mainly used is the drive of commercial car for example tractor, as shown in fig. 1 to 4, this many motors synthesis case includes casing 1, casing 1 is inside to have four installation rooms 1a, motor stator 2 has been linked firmly respectively on the inner wall of every installation room 1a, be equipped with motor rotor 3 in every motor stator 2, be connected with driving gear 4 on every motor rotor 3's the pivot 31 respectively, be equipped with the output gear 5 that is used for realizing power output on the casing 1, driving gear 4's diameter is less than output gear 5's diameter, each driving gear 4 all meshes with output gear 5 mutually and drives output gear 5 jointly and rotates. Four installation chambers 1a are arranged in a rectangular array, two of the installation chambers 1a being upper installation chambers 1a1 and the other two installation chambers 1a being lower installation chambers 1a2, two of the upper installation chambers 1a1 being arranged side by side in the horizontal direction in the upper portion of the housing 1, and two of the lower installation chambers 1a2 being arranged side by side in the horizontal direction in the lower portion of the housing 1. The device realizes power output by driving the output gear 5 to rotate by the four motors together, and the output power required by each motor is lower on the premise of realizing the same output power, so that the diameter of the motor stator 2 and the diameter of the motor rotor 3 of a single motor can be greatly reduced, and the weight is greatly reduced; on the other hand, the diameter of the driving gear 4 is smaller than that of the output gear 5, so that each motor drives the output gear 5 to rotate, and torque increasing transmission is realized. The rotating speed of each motor can be very high due to the two factors, so that a single motor can realize larger rotating speed range and power density, and on the premise of realizing equal output power, compared with the existing single-motor drive assembly, the multi-motor combined box can effectively reduce the overall size, is light in weight and can be conveniently arranged. Preferably, each motor adopts a flat wire motor, the flat wire motor has larger power density, and the size of the multi-motor combined box can be reduced as much as possible.

Referring to fig. 3 and 4, the housing 1 includes a front housing 1e, four rear end caps 1d, and a vertically disposed base plate 1b, four cylindrical mounting portions 1c having openings at rear ends are formed on a rear side surface of the base plate 1b, and each opening is covered with one rear end cap 1d, so that the inside of each lower mounting portion 1c forms one of the mounting chambers 1 a. The front casing 1e is fixedly connected to the front side surface of the base plate 1b and forms a gear chamber 1f with the front side surface of the base plate 1b, and the output gear 5 and the driving gear 4 are both arranged in the gear chamber 1 f. The multi-motor synthesis box can be connected with a gearbox or a rear axle to drive the whole vehicle, and in order to realize power output, a spline hole 51 is formed in the center of the output gear 5, and the spline hole 51 is used for the power output shaft to penetrate.

In order to realize the installation of the motor stator 2, as shown in fig. 4, 6 and 7, the inner wall of the installation chamber 1a is provided with four positioning grooves 1h which are sequentially arranged along the circumferential direction, each positioning groove 1h is in a strip shape and extends along the axial direction of the installation chamber 1a, the outer wall of each motor stator 2 is provided with four connecting lugs 21, and as shown in fig. 3, the four connecting lugs 21 are embedded into the four positioning grooves 1h in a one-to-one correspondence manner and are fixed through the motor bolts 17. Meanwhile, each motor bolt 17 is fixedly connected with a motor foot supporting seat 18, so that the rear end of the motor stator 2 is supported, and the motor stator 2 is prevented from vibrating when a vehicle passes through a bumpy road surface.

In order to realize the installation of the motor rotor 3, as shown in fig. 3, each rear end cover 1d is provided with a rear supporting hole 1d1, the rear end of the rotating shaft 31 of the motor rotor 3 is connected in the corresponding rear supporting hole 1d1 through a rear bearing 9, the positions of the base plate 1b corresponding to the rotating shaft 31 of each motor rotor 3 are respectively provided with a front supporting hole 1b1, and the front end of the rotating shaft 31 of the motor rotor 3 is connected in the corresponding front supporting hole 1b1 through a front bearing 10.

In order to realize the heat dissipation of each motor, the multi-motor synthesis box is also provided with a cooling system. Specifically, as shown in fig. 5 to 9, the cooling system includes an oil pump 14, an oil storage chamber 1g provided at the bottom of the housing 1, and an oil inlet passage 6 provided on the base plate 1b, the oil storage chamber 1g being used to recover lubricating oil that has flowed back from each of the lubricating and cooling portions. All be equipped with three cooling oil pipe 7 in every installation room 1a, every cooling oil pipe 7 all communicates with oil feed route 6 mutually, and the length direction of cooling oil pipe 7 is unanimous with the axis direction of motor stator 2, has seted up a plurality of holes 8 that spray along its length direction on the cooling oil pipe 7. One of the three cooling oil pipes 7 is a first cooling oil pipe 71 located right above the corresponding motor stator 2, and the other two cooling oil pipes 7 are second cooling oil pipes 72 located respectively at the upper left and upper right of the corresponding motor stator 2. A plurality of spray holes 8 on the cooling oil pipe 7 can effectively dissipate heat of different positions of the motor stator 2, thereby effectively avoiding the problem of output power reduction caused by overhigh temperature of the motor.

As shown in fig. 8, the oil inlet passage 6 includes an upper transverse passage 61, an oil inlet transverse passage 62, and a lower transverse passage 63, which are sequentially arranged from top to bottom, the upper transverse passage 61, the oil inlet transverse passage 62, and the lower transverse passage 63 are communicated with each other through a vertically arranged vertical passage 65, one end of each of four second cooling oil pipes 72 in two upper mounting chambers 1a1 is communicated with the upper transverse passage 61, one end of each of four second cooling oil pipes 72 in two lower mounting chambers 1a2 is communicated with the lower transverse passage 63, the upper transverse passage 61 is further connected with two extending passages 64 extending upward, and two first cooling oil pipes 71 in two upper mounting chambers 1a1 are respectively communicated with the two extending passages 64 in a one-to-one correspondence. One end of the oil inlet transverse channel 62 is connected with an oil inlet pipe joint 12, and the outer wall of the shell 1 is provided with an oil outlet pipe joint 13. The inlet of the oil pump 14 is communicated with the oil storage chamber 1g through a pipeline, and the outlet is communicated with the oil outlet pipe joint 13 through a pipeline, so that the oil pump 14 can convey the lubricating oil in the oil storage chamber 1g to the oil outlet pipe joint 13.

Specifically, as shown in fig. 6, 8 and 9, two first oil passing holes 66 are formed in a side wall of the oil inlet transverse passage 62, one end of each of two first cooling oil pipes 71 in two lower mounting chambers 1a2 is inserted into the two first oil passing holes 66 in a one-to-one correspondence manner, four second oil passing holes 67 are respectively formed in side walls of the upper transverse passage 61 and the lower transverse passage 63, one end of each of four second cooling oil pipes 72 in two upper mounting chambers 1a1 is inserted into the four second oil passing holes 67 of the upper transverse passage 61 in a one-to-one correspondence manner, and one end of each of four second cooling oil pipes 72 in two lower mounting chambers 1a2 is inserted into the four second oil passing holes 67 of the lower transverse passage 63 in a one-to-one correspondence manner. Through set up first oil passing hole 66 or second oil passing hole 67 on the lateral wall of each transverse channel, not only realized the transport of lubricating oil, but also realized the installation of cooling oil pipe 7, had the advantage that makes conveniently, with low costs. In order to improve the mounting stability of the cooling oil pipes 7, a mounting piece 15 is further arranged on the outer wall of the other end of each cooling oil pipe 7, a bolt hole is formed in each mounting piece 15, and each mounting piece 15 is connected to the inner wall of the mounting portion 1c through a pipe bolt 16 penetrating through the bolt hole.

In the multi-motor combination box, the oil pump 14 can adopt a mechanical pump in the prior art, such as a single-rotor type lubricating oil pump 14 (application number: 201721301873.1) disclosed in chinese patent literature, when the oil pump 14 is installed, the rotor 141 of the oil pump 14 is sleeved on the journal portion of the output gear 5, and the output gear 5 drives the rotor 141 of the oil pump 14 to rotate, so that the oil pump 14 works. When the whole vehicle is assembled, the oil outlet pipe joint 13 is communicated with an oil inlet of an automobile oil cooler through a pipeline, and an oil outlet of the oil cooler is communicated with the oil inlet pipe joint 12 of the device. When the multi-motor combined box works, the oil pump 14 can convey lubricating oil to the oil outlet pipe joint 13, then the lubricating oil flows through the oil cooler for cooling, then enters the cooling passage through the oil inlet pipe joint 12 to lubricate and cool the motors, gears, bearings and the like in the multi-motor combined box, lubricating oil at each lubricating and cooling part returns to the oil storage chamber 1g, and the circulation is repeated.

In order to cool the front bearing 10, as shown in fig. 8, bearing cooling oil holes 1b2 are respectively opened in the base plate 1b at positions corresponding to each front support hole 1b1, the inlet end of the bearing cooling oil hole 1b2 communicates with the oil inlet passage 6, and the outlet end of the bearing cooling oil hole 1b2 is located on the side wall corresponding to the front support hole 1b 1. Specifically, two bearing cooling oil holes 1b2 located at the lower portion of the base plate 1b communicate with the lower cross passage 63, and two bearing cooling oil holes 1b2 located at the upper portion of the base plate 1b communicate with the upper cross passage 61. One section diameter of bearing cooling oilhole 1b2 export is thinner, and because the lubricating oil in the oil feed route 6 has certain pressure, consequently makes bearing cooling oilhole 1b2 can lubricate front bearing 10 in the front support hole 1b1 with lubricating oil force injection, guarantees that high-speed running front bearing 10 has better lubrication and cooling effect, and then has guaranteed that the motor can operate steadily and carry out power take off, guarantees output.

In order to cool the rear bearing 9, as shown in fig. 10, 11 and 12, an oil guide hole 1d2 is radially formed in the upper portion of the rear end cap 1d, the two ends of which penetrate through the oil guide hole 1d2, an opening at the upper end of the oil guide hole 1d2 is located right below one of the spray holes 8 on the first cooling oil pipe 71 in the corresponding mounting chamber 1a, and an opening at the lower end of the oil guide hole 1d2 is located on the top side wall of the corresponding rear support hole 1d 1. The opening of leading oilhole 1d2 upper end is located and sprays the hole 8 under for the lubricating oil that sprays the outflow of hole 8 can get into in leading oilhole 1d2, then flows to in the back supporting hole 1d1 through leading oilhole 1d2, thereby dispels the heat and lubricate rear bearing 9. This design makes first cooling oil pipe 71 can carry out the heat dissipation to motor and rear bearing 9 simultaneously, and the design is very ingenious, on satisfying the holistic lubricated of many motors combination case and the basis of heat dissipation requirement, can simplify the lubrication and the cooling system of this device, and then is favorable to reducing equipment cost.

As shown in fig. 13, a gear cooling oil pipe 11 is further disposed at a side portion of each driving gear 4 in the gear chamber 1f, and an oil injection hole is formed in the gear cooling oil pipe 11, and the oil injection hole may face the driving gear 4 or the output gear 5 or a meshing portion therebetween. Each gear cooling oil pipe 11 is communicated with the oil inlet passage 6. Through set up the gear cooling oil pipe 11 that can spout lubricating oil at the lateral part of every driving gear 4, lubricate output gear 5 and each driving gear 4 in the gear room 1f by force for each gear is in the operation of a high-efficient lubricated state all the time, and then guarantees that this many motors combination case can export power steadily.

Example two

The structure and principle of this embodiment are basically the same as those of the first embodiment, and different points are as follows: the casing 1 is inside to have three installation room 1a, has linked firmly motor stator 2 on the inner wall of three installation room 1a respectively, is equipped with motor rotor 3 in every motor stator 2, is connected with driving gear 4 on every motor rotor 3's the pivot 31 respectively, is equipped with the output gear 5 that is used for realizing power take off on the casing 1, and three installation room 1a sets up along the even interval of casing 1's circumference.

EXAMPLE III

The structure and principle of this embodiment are basically the same as those of the first embodiment, and different points are as follows: the casing 1 is inside to have five installation rooms 1a, has linked firmly motor stator 2 on five installation rooms 1 a's the inner wall respectively, is equipped with motor rotor 3 in every motor stator 2, is connected with driving gear 4 on every motor rotor 3's the pivot 31 respectively, is equipped with the output gear 5 that is used for realizing power take off on the casing 1, and five installation rooms 1a set up along the even interval of casing 1's circumference.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although 1, the housing is used more herein; 1a, an installation chamber; 1a1, upper mounting chamber; 1a2, lower mounting chamber; 1b, a substrate; 1b1, front support aperture; 1b2, bearing cooling oil hole; 1c, an installation part; 1d, a rear end cover; 1d1, rear support hole; 1d2, oil guide hole; 1e, a front housing; 1f, a gear chamber; 1g, an oil storage chamber; 1h, positioning a groove; 2. a motor stator; 21. a connecting lug; 3. a motor rotor; 31. a rotating shaft; 4. a driving gear; 5. an output gear; 51. a splined bore; 6. an oil inlet passage; 61. an upper transverse channel; 62. an oil inlet transverse channel; 63. a lower transverse channel; 64. an extension channel; 65. a vertical channel; 66. A first oil passing hole; 67. a second oil passing hole; 7. cooling the oil pipe; 71. a first cooling oil pipe; 72. a second cooling oil pipe; 8. spraying holes; 9. a rear bearing; 10. a front bearing; 11. A gear cooling oil pipe; 12. an oil inlet pipe joint; 13. an oil outlet pipe joint; 14. an oil pump; 141. a rotor; 15. mounting a sheet; 16. an oil pipe bolt; 17. a motor bolt; 18. motor foot support and the like, but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.