Device for providing hydraulic energy and vehicle chassis system

Abstract

The utility model discloses a device for providing hydraulic energy and a vehicle chassis system. The device for providing hydraulic energy comprises a first hydraulic pump, a first motor, a second hydraulic pump, a second motor and a motor control unit. The first motor is used for driving the first hydraulic pump, the second motor is used for driving the second hydraulic pump, and the motor control unit is used for controlling the first motor and the second motor. The axis of the first motor and the axis of the second motor are parallel and staggered in the radial direction of the first motor, and the first bottom face of the first motor and the second bottom face of the second motor are opposite and separated. The vehicle chassis system comprises the device for providing the hydraulic energy and two shock absorbers, and the first hydraulic pump and the second hydraulic pump of the device for providing the hydraulic energy are used for providing hydraulic fluid for the two shock absorbers respectively.

Description

Technical Field

[0001] This application relates to the technical field of automobiles, and particularly to a device for providing hydraulic energy and a vehicle chassis system. The vehicle chassis system may include the device for providing hydraulic energy. Background Art

[0002] An active chassis system may include a shock absorber, a hydraulic pump, and a motor. The hydraulic pump is connected to the working cylinder of the shock absorber, and the motor drives the hydraulic pump to pump hydraulic fluid into the working cylinder of the shock absorber, and appropriate damping can be set for the shock absorber according to road conditions, and pitching and / or rolling movements of the vehicle can be offset, etc.

[0003] The patent with the publication number CN112193009A discloses an MPU (motor-pump unit) axle group with a common ECU (electronic control unit). Further, it discloses various setting schemes of two groups of motor-pump units for providing hydraulic energy to the shock absorbers in the active chassis system.

[0004] However, this solution has some drawbacks, such as:

[0005] (1) In some solutions, the two motors of the two groups are coaxially arranged, and axial resonance is likely to occur when the two motors operate at the same frequency.

[0006] (2) The structure of the ECU is compact, and the power components in it are close in position, which is prone to heat accumulation and not easy to dissipate heat.

[0007] (3) The two motors are arranged back-to-back or side by side, resulting in a small distance between the motors, which is prone to heat accumulation and not easy to dissipate heat. Utility Model Content

[0008] In order to solve or alleviate at least one technical problem mentioned in the background art, this application discloses a device for providing hydraulic energy and a vehicle chassis system.

[0009] The device for providing hydraulic energy disclosed in an embodiment of this application includes:

[0010] A first hydraulic pump and a first motor, the first motor is used to drive the first hydraulic pump;

[0011] A second hydraulic pump and a second motor, the second motor is used to drive the second hydraulic pump;

[0012] A motor control unit, the motor control unit is used to control the first motor and the second motor,

[0013] The axis of the first motor is parallel to the axis of the second motor and is radially offset from the first motor, and the first bottom surface of the first motor and the second bottom surface of the second motor face each other and are separated.

[0014] In at least one embodiment, the axial extension lines of the sides of the first motor are spaced apart from the axial extension lines of the sides of the second motor.

[0015] In at least one embodiment, the distance between the axis of the first motor and the axis of the second motor is L1, and 20 mm ≤ L1 ≤ 80 mm.

[0016] In at least one embodiment, the motor control unit includes:

[0017] The first part of the motor control unit, which is located between the first motor and the second motor;

[0018] The second part of the motor control unit, which is located at one end of the first part of the motor control unit;

[0019] The third part of the motor control unit, which is located at the other end of the first part of the motor control unit.

[0020] In at least one embodiment, the extending direction of the second part of the motor control unit and the extending direction of the third part of the motor control unit are parallel and both perpendicular to the extending direction of the first part of the motor control unit.

[0021] In at least one embodiment, the motor control unit includes a first power device and a second power device. The first power device is disposed in the second part of the motor control unit, and the second power device is disposed in the third part of the motor control unit.

[0022] In at least one embodiment, the housings of the first motor and the second motor are configured as cylinders, and the housings of the second part of the motor control unit and the third part of the motor control unit are configured as rectangles, such that there are gaps between the first motor and the second part of the motor control unit and between the second motor and the third part of the motor control unit.

[0023] Another embodiment of the present application discloses a device for providing hydraulic energy, including:

[0024] A first hydraulic pump and a first motor, where the first motor is used to drive the first hydraulic pump;

[0025] A second hydraulic pump and a second motor, where the second motor is used to drive the second hydraulic pump;

[0026] A motor control unit, which is used to control the first motor and the second motor,

[0027] The axis of the first motor intersects with the axis of the second motor.

[0028] Another embodiment of the present application discloses a device for providing hydraulic energy, comprising:

[0029] A first hydraulic pump and a first motor, wherein the first motor is used to drive the first hydraulic pump;

[0030] A second hydraulic pump and a second motor, wherein the second motor is used to drive the second hydraulic pump;

[0031] A motor control unit, which is used to control the first motor and the second motor.

[0032] The axis of the first motor is parallel to the axis of the second motor and is offset in the radial direction of the first motor.

[0033] The first motor and the second motor have the same structure. The axial extension lines of the sides of the first motor and the second motor are separated. The overlapping distance of the first motor and the second motor in the axial direction of the first motor is W, and W is less than 50% of the axial length of the first motor or the second motor.

[0034] A vehicle chassis system disclosed in an embodiment of the present application comprises:

[0035] The device for providing hydraulic energy as described above;

[0036] Two shock absorbers, and the first hydraulic pump and the second hydraulic pump of the device for providing hydraulic energy are respectively used to provide hydraulic fluid for the two shock absorbers.

[0037] In the present application, the axes of the two motors are arranged in a parallel or other non-axis-overlapping form, which can reduce the resonance problem. In addition, since the axes do not overlap, the first motor, the motor control unit, and the second motor are not stacked in an axis-overlapping design, so that the heat generation sites in the components can be dispersed, preventing heat accumulation and facilitating heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 Fig. shows a schematic structural diagram of a device for providing hydraulic energy according to Embodiment 1 of the present application.

[0039] Figure 2 Fig. shows a schematic structural diagram of a device for providing hydraulic energy according to Embodiment 2 of the present application.

[0040] Figure 3 Fig. shows a schematic structural diagram of a device for providing hydraulic energy according to Embodiment 3 of the present application.

[0041] Figure 4 Fig. shows a schematic structural diagram of a device for providing hydraulic energy according to Embodiment 4 of the present application.

[0042] Description of Reference Numerals

[0043] 110 First hydraulic pump

[0044] 120 First Motor

[0045] 130 First bottom surface

[0046] 210 Second hydraulic pump

[0047] 220 Second Motor

[0048] 230 Second bottom surface

[0049] 300 Motor Control Unit

[0050] 310 Motor Control Unit Part 1

[0051] 320 Motor Control Unit Part 2

[0052] 330 Motor Control Unit Part 3 DETAILED DESCRIPTION

[0053] The exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, and are not intended to exhaust all possible methods of the present application, nor to limit the scope of the present application.

[0054] See also Figure 1 The device for providing hydraulic energy in the first embodiment of the present application may include: a first hydraulic pump 110 , a first motor 120 , a second hydraulic pump 210 , a second motor 220 , and a motor control unit 300 .

[0055] The first motor 120 is used to drive the first hydraulic pump 110, and the second motor 220 is used to drive the second hydraulic pump 210. The first motor 120 and the second motor 220 may be configured to have the same structure or design, and the motor control unit 300 is used to control the first motor 120 and the second motor 220.

[0056] The axis of the first motor 120 is parallel to the axis of the second motor 220 and is staggered in the radial direction of the first motor 120, and the extension direction of the output shaft of the first motor 120 (not shown in the figure, for example, Figure 1 The output shaft of the second motor 220 may extend in the direction of the left side (not shown in the figure), for example, Figure 1 The first bottom surface 130 of the first motor 120 and the second bottom surface 230 of the second motor 220 face each other and are spaced apart from each other.

[0057] The vibration propagation directions of the two motors are mainly axial and radial. The inventor found that when the two motors are axially coincident, operating at the same frequency easily leads to axial resonance. Additionally, when the two motors are axially parallel and symmetrically arranged side by side, operating at the same frequency also easily generates resonance in the radial direction.

[0058] In this application, the axes of the two motors are set to be parallel and radially offset, which to a certain extent avoids the problem of axial resonance that is prone to occur when the axes are coaxial. Additionally, this application also limits the two motors to be separated axially, simultaneously avoiding the problem of radial resonance. Therefore, the non-axisymmetric motor arrangement form provided by this application can reduce the resonance problem of the motors. Additionally, since the axes do not coincide, the first motor 120, the motor control unit 300, and the second motor 220 are not a stacked design with coincident axes, enabling the heat generation sites in the components to be dispersed, preventing heat accumulation, and facilitating heat dissipation.

[0059] See Figure 2 , in the second implementation manner, the axial extension lines of the sides of the first motor 120 and the second motor 220 are separated. That is, the two motors can also be completely separated radially, further avoiding the resonance problem.

[0060] Therefore, as Figure 1 shown, the two motors can partially overlap radially; or as Figure 2 shown, the two motors can be completely separated radially. Exemplarily, the diameters of the first motor 120 and the second motor 220 can be 120 mm. The distance between the axis of the first motor 120 and the axis of the second motor 220 is L1, and 20 mm ≤ L1 ≤ 80 mm. It can be understood that if L1 is too small, the distance between the axes of the two motors will be too close, exacerbating the resonance phenomenon. If L1 is too large, the distance between the axes of the two motors will be too far, increasing the overall volume of the device providing hydraulic energy and being unfavorable for the effective utilization of the vehicle chassis space.

[0061] The distance between the first bottom surface 130 and the second bottom surface 230 can be L2. In one example, 20 mm ≤ L2 ≤ 100 mm. It can be understood that if L2 is too small, the two motors will be too close, making the thickness of the first part 310 of the motor control unit (introduced later) sandwiched between the two motors too small and difficult to manufacture. If L2 is too large, the two motors will be too far apart, increasing the overall volume of the device providing hydraulic energy and being unfavorable for the effective utilization of the chassis space.

[0062] See Figure 1, the motor control unit 300 may include a first part 310 of the motor control unit, a second part 320 of the motor control unit, and a third part 330 of the motor control unit. The first part 310 of the motor control unit is located between the first motor 120 and the second motor 220, the second part 320 of the motor control unit is located at one end of the first part 310 of the motor control unit, and the third part 330 of the motor control unit is located at the other end of the first part 310 of the motor control unit.

[0063] Compared with the first motor 120 and the second motor 220 being arranged back-to-back or side-by-side, in this application, the first part 310 of the motor control unit separates the two motors, avoiding heat accumulation in the motors and being more conducive to heat dissipation. Compared with the motor control unit 300 integrally forming a compact rectangular or cylindrical structure, in this application, the structural style of the motor control unit 300 can not only separate the first motor 120 and the second motor 220, but also increase the surface area as a whole, facilitating the dispersion of heat generation sites and being more conducive to heat dissipation.

[0064] Further, the extending direction of the second part 320 of the motor control unit and the extending direction of the third part 330 of the motor control unit are parallel and both perpendicular to the extending direction of the first part 310 of the motor control unit. For example, as Figure 1 shown, the first part 310 of the motor control unit extends in the up-down direction, the second part 320 of the motor control unit and the third part 330 of the motor control unit extend in the left-right direction, and the motor control unit 300 as a whole presents a "Z" shape or a stepped shape, making the overall structure more compact while facilitating heat dissipation. Of course, this application does not limit the extending directions of the second part 320 of the motor control unit and the third part 330 of the motor control unit. For example, they can both be inclined (instead of perpendicular) to the extending direction of the first part 310 of the motor control unit.

[0065] Further, the motor control unit 300 includes a first power device (not shown in the figure) and a second power device (not shown in the figure). The first power device can be arranged on the second part 320 of the motor control unit, and the second power device can be arranged on the third part 330 of the motor control unit. That is, the power devices that are prone to heat generation can be located at the relatively far ends of the motor control unit 300, reducing heat accumulation and being conducive to heat dissipation.

[0066] Further, the housings of the first motor 120 and the second motor 220 can be set to be cylindrical, and the housings of the second part 320 of the motor control unit and the third part 330 of the motor control unit can be set to be rectangular, so as to leave a heat dissipation space between the motors and the motor control unit 300. Of course, the housing of at least one of the first motor 120 and the second motor 220 can also be rectangular, and the housing of at least one of the second part 320 of the motor control unit and the third part 330 of the motor control unit can also be cylindrical. That is, this application does not particularly limit the specific structures of the housings of each component.

[0067] See Figure 3 In the third embodiment, the parallel relationship between the axes of the first motor 120 and the second motor 220 can be replaced with an intersecting relationship. This embodiment also avoids the coaxial or parallel arrangement between the two motors, and can reduce the resonance problem to a certain extent. Of course, when the axes of the two motors intersect, in addition to being perpendicular to each other, other angles can also be formed between the axes.

[0068] See Figure 4 In the fourth embodiment, when the structures of the first motor 120 and the second motor 220 are the same and the axial extension lines of the sides of the first motor 120 and the second motor 220 are separated, the position relationship where the first bottom surface 130 and the second bottom surface 230 face each other and are separated can be replaced with: the first motor 120 and the second motor 220 have an overlapping distance W in the axial direction, and the overlapping distance W is less than 50% of the axial length of the first motor 120 or the second motor 220. Compared with the case where the two motors have the same structure and are arranged in parallel (in this case, the overlapping distance is equal to the axial length of the motor), this embodiment reduces its overlapping distance, and correspondingly reduces the resonance problem caused by the vibration propagating radially.

[0069] The embodiments of the present application provide a vehicle chassis system, and the vehicle chassis system may include the device for providing hydraulic energy and two shock absorbers as described above. The first hydraulic pump 110 and the second hydraulic pump 210 of the device for providing hydraulic energy can respectively provide hydraulic fluid for the two shock absorbers.

[0070] The above are the preferred embodiments of the present application. It should be noted that for those skilled in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A device for providing hydraulic energy, characterized in that, Comprising: A first hydraulic pump and a first motor, the first motor being used to drive the first hydraulic pump; A second hydraulic pump and a second motor, the second motor being used to drive the second hydraulic pump; A motor control unit, the motor control unit being used to control the first motor and the second motor, The axis of the first motor is parallel to the axis of the second motor and is radially offset with respect to the first motor, and the first bottom surface of the first motor and the second bottom surface of the second motor face each other and are separated.

2. The device for providing hydraulic energy according to claim 1, characterized in that, The axial extension line of the side surface of the first motor and the axial extension line of the side surface of the second motor are separated.

3. The device for providing hydraulic energy according to claim 1, characterized in that, The distance between the axis of the first motor and the axis of the second motor is L1, and 20 mm ≤ L1 ≤ 80 mm.

4. The device for providing hydraulic energy according to claim 1, characterized in that, The motor control unit includes: A first part of the motor control unit, the first part of the motor control unit being located between the first motor and the second motor; A second part of the motor control unit, the second part of the motor control unit being located at one end of the first part of the motor control unit; A third part of the motor control unit, the third part of the motor control unit being located at the other end of the first part of the motor control unit.

5. The device for providing hydraulic energy according to claim 4, characterized in that, The extending direction of the second part of the motor control unit and the extending direction of the third part of the motor control unit are parallel and both are perpendicular to the extending direction of the first part of the motor control unit.

6. The device for providing hydraulic energy according to claim 4, characterized in that, The motor control unit includes a first power device and a second power device, the first power device being arranged in the second part of the motor control unit, and the second power device being arranged in the third part of the motor control unit.

7. The device for providing hydraulic energy according to claim 4, characterized in that, The housing of the first motor and the housing of the second motor are arranged in a cylindrical shape, and the housing of the second part of the motor control unit and the housing of the third part of the motor control unit are arranged in a rectangular shape, so that there is a gap between the first motor and the second part of the motor control unit and between the second motor and the third part of the motor control unit.

8. A device for providing hydraulic energy, characterized in that, Comprising: A first hydraulic pump and a first motor, the first motor being used to drive the first hydraulic pump; A second hydraulic pump and a second motor, the second motor being used to drive the second hydraulic pump; A motor control unit, the motor control unit being used to control the first motor and the second motor, The axis of the first motor intersects the axis of the second motor.

9. A device for providing hydraulic energy, characterized in that, Comprising: A first hydraulic pump and a first motor, the first motor being used to drive the first hydraulic pump; A second hydraulic pump and a second motor, the second motor being used to drive the second hydraulic pump; A motor control unit, the motor control unit being used to control the first motor and the second motor, The axis of the first motor is parallel to the axis of the second motor and is radially offset with respect to the first motor, The structures of the first motor and the second motor are the same, the axial extension line of the side surface of the first motor and the axial extension line of the side surface of the second motor are separated, and the overlapping distance of the first motor and the second motor in the axial direction of the first motor is W, and W is less than 50% of the axial length of the first motor or the second motor.

10. A vehicle chassis system, the vehicle chassis system comprising: The hydraulic energy providing device according to any one of claims 1 to 9; Two shock absorbers, wherein the first hydraulic pump and the second hydraulic pump of the device for providing hydraulic energy are respectively used to provide hydraulic fluid for the two shock absorbers.

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