CN217514960U

CN217514960U - Time-sharing parallel hub driving system

Info

Publication number: CN217514960U
Application number: CN202220409639.5U
Authority: CN
Inventors: 黄东; 王海兵; 孙登明; 姜艳军
Original assignee: Chongqing Tsingshan Industrial Co Ltd
Current assignee: Chongqing Tsingshan Industrial Co Ltd
Priority date: 2022-02-28
Filing date: 2022-02-28
Publication date: 2022-09-30
Anticipated expiration: 2032-02-28

Abstract

The utility model discloses a time-sharing parallel hub driving system, which comprises a hub, a first motor, a first planet row and a second motor, wherein a rotor of the first motor is connected with the hub, the first planet row is connected with the hub or the rotor of the first motor, the first planet row is also connected with a stator of the first motor, the time-sharing parallel hub driving system also comprises an automatic disconnecting and combining device, and the automatic disconnecting and combining device is respectively connected with the first planet row and the second motor; when the first motor works to directly provide torque for the hub, the hub or a rotor of the first motor drives the first planet row to rotate, the automatic disconnection and combination device is in an automatic disconnection state, the automatic disconnection and combination device idles, and the second motor is in a static state. When the second motor works, the torque is transmitted to the first planet row through the automatic disconnection and combination device, and then the second motor is driven in parallel with the first motor. The utility model has the advantages of simplified structure and reduced cost.

Description

Time-sharing parallel hub driving system

Technical Field

The utility model relates to a wheel hub actuating system, concretely relates to parallelly connected wheel hub actuating system of time sharing.

Background

CN112838711A discloses a hub motor with double motors running in parallel, which comprises a direct drive motor and a low torque motor, wherein the direct drive motor is used for directly driving wheels, the direct drive motor and the low torque motor share a cooling system, the power of the low torque motor is input into a first-stage planetary reduction gear, the suction and the separation of a clutch determine whether the power is transmitted from the first-stage planetary reduction gear to a second-stage planetary reduction gear, the power of a third-stage planetary reduction gear is coupled to an outer rotor shell 3 of the direct drive motor through an outer transmission cover 33 to realize the parallel running of the double motors, when the vehicle needs the power, the direct drive motor is continuously operated all the time, when climbing or accelerating at medium and low speed, the low-torque motor transmission system is operated in an intervening mode to provide higher peak torque, when the vehicle speed is higher, the low-torque motor is separated, and higher back electromotive force generated by dragging is avoided.

The scheme totally adopts 2 motors, 3 rows of planet wheel devices and 1 clutch, and the direct drive motor is used for directly driving the wheels; after the low-torque motor is subjected to speed reduction and torque increase by the first planet row, power is input to the second planet row and the third planet row through the clutch to be subjected to speed reduction and torque increase, and finally the low-torque motor and the direct drive motor are driven in parallel; the above solution has the following drawbacks:

in order to realize the direct drive and torque increase, an independent control system is required to realize the engagement or the disengagement of the clutch, the independent clutch control system needs an electric control part and a hydraulic drive part, so that the structure is complex, and under the condition of adopting 3 planet rows, the structure is complex and the cost is high; when the vehicle speed is high, the rotating speed of the low-torque motor is high, and the NVH performance is poor.

Disclosure of Invention

The utility model provides a simplify structure, reduce cost's parallelly connected wheel hub actuating system of timesharing.

The technical scheme for solving the problems is as follows:

the time-sharing parallel hub driving system comprises a hub, a first motor, a first planet row and a second motor, wherein a rotor of the first motor is connected with the hub, the first planet row is connected with the hub or the rotor of the first motor, the first planet row is also connected with a stator of the first motor, and the time-sharing parallel hub driving system also comprises an automatic disconnecting and combining device, and the automatic disconnecting and combining device is respectively connected with the first planet row and the second motor;

when the first motor works to directly provide torque for the hub, the hub or a rotor of the first motor drives the first planet row to rotate, the automatic disconnection and combination device is in an automatic disconnection state, the automatic disconnection and combination device idles, and the second motor is in a static state;

when the first motor and the second motor work, the first motor directly provides torque for the hub, the hub or a rotor of the first motor drives the first planet row to rotate, the second motor provides torque for the automatic disconnection and combination device, the automatic disconnection and combination device is automatically combined, the torque output by the second motor is transmitted to the first planet row through the automatic disconnection and combination device, and the torque of the first motor is coupled with the torque of the second motor and then transmitted to the hub through the first planet row.

The utility model has the advantages that:

1. in the utility model, when the first motor is driven in the positive direction, each component of the first planet row freely rotates without load, the second motor is static, and the automatic disconnection and combination device idles and does not transmit torque; when the vehicle has the driving requirements of the first motor and the second motor, the second motor increases the rotating speed to enable the rotating speed of the first planet carrier of the first planet row to be synchronous with that of the first motor, and at the moment, the automatic disconnection and combination device transmits torque, so that the parallel connection driving of the double motors is realized. Therefore, the utility model discloses according to the rotational speed that first motor and/or second motor provided, decide the disconnection or the combination of automatic disconnection and binding apparatus, consequently, the utility model discloses need not dispose corresponding executive component control system for automatic disconnection and binding apparatus separately to be favorable to simplifying the structure of vehicle, and reduce the manufacturing cost of vehicle.

2. When the vehicle power demand is small, a single-motor driving mode is adopted, and when the vehicle power demand is large, a double-motor driving mode is adopted.

Drawings

Fig. 1 is a first time-sharing parallel hub driving system of the present invention;

FIG. 2 is a cross-sectional view of the automatic break and connect apparatus;

fig. 3 shows a second time-sharing parallel hub driving system

Reference numbers in the drawings:

the automatic disconnection and combination device comprises a hub 1, a first motor 2, a rotor 2a, a stator 2b, a shell 3, a first planet row 4, a first sun gear 4a, a first planet carrier 4b, a first gear ring 4c, a first planet gear 4d, a second motor 5, a stator 5a, a rotor 5b, an automatic disconnection and combination device 6, an outer ring 6a, a planet gear 6b, a rolling body 6c, a mandril 6d, a spring 6e, a shaft 6f, a second planet row 7, a second sun gear 7a, a second planet carrier 7b, a second gear ring 7c and a second planet gear 7 d.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the following drawings in the embodiments of the present invention are combined to describe technical solutions in the embodiments of the present invention in more detail. The described embodiments are some, but not all embodiments of the invention. The embodiments described below by referring to the drawings are exemplary and intended to explain the present invention, but cannot be simply construed as a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention. The following detailed description of embodiments of the present invention is made with reference to the accompanying drawings:

in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the scope of the present invention.

As shown in fig. 1, the utility model discloses a parallelly connected wheel hub actuating system of first time sharing, including wheel hub 1, first motor 2, first planet row 4, second motor 5, automatic disconnection and combining device 6, the rotor 2a of first motor 2 is connected with wheel hub 1, and the connected mode is not limited to mechanical system such as spline. The first planetary row 4 is connected to the hub 1 or the rotor 2a of the first motor 2, the first planetary row 4 is further connected to the stator 2b of the first motor 2 or the housing 3, and the stator 2b of the first motor 2 is connected to the fixed housing 3. The automatic disconnecting and connecting device 6 is connected to the first planetary gear set 4 and the second motor 5, respectively, and the stator 5a of the second motor 5 is connected to the fixed housing 3, but the connection method is not limited to a mechanical method such as a spline.

When the first motor 2 is operated to directly provide torque to the hub 1, the hub 1 or the rotor 2a of the first motor 2 drives the first planetary row 4 to rotate, the automatic disconnecting and connecting device 6 is in an automatic disconnecting state, the automatic disconnecting and connecting device 6 idles, and the second motor 5 is in a static state.

When the first motor 2 and the second motor 5 both work, the first motor 2 directly provides torque for the hub 1, the hub 1 or a rotor 2a of the first motor 2 drives the first planet row 4 to rotate, the second motor 5 automatically combines the automatic disconnection and combination device 6 after providing torque for the automatic disconnection and combination device 6, the torque output by the second motor 5 is transmitted to the first planet row 4 through the automatic disconnection and combination device 6, and the torque of the first motor 2 is coupled with the torque of the second motor 5 and then transmitted to the hub 1 through the first planet row 4.

The first planet row 4 includes a first sun gear 4a, a first planet carrier 4b, a first ring gear 4c, and a first planet gear 4d, the first ring gear 4c is connected with the stator 2b of the first motor 2, and the connection mode is not limited to a mechanical mode such as a spline. The first carrier 4b is connected to the hub 1 or the rotor 2a of the first motor 2, and the connection method is not limited to a mechanical method such as a spline. The first planet carrier 4b is also connected to a first planet wheel 4d, the first planet wheel 4d is respectively matched with a first sun gear 4a and a first gear ring 4c, and the first sun gear 4a is connected to an automatic disconnecting and connecting device 6. The first ring gear 4c of the first planetary row 4 can also be connected to the stationary housing 3.

The automatic disconnection and connection device 6 comprises an outer ring 6a, a star wheel 6b, a rolling body 6c, a push rod 6d, a spring 6e and a shaft 6f, wherein an opening is formed in the circumferential surface of the star wheel 6b, a mounting hole corresponding to the opening is further formed in the star wheel 6b, a wedge gap is formed between the star wheel 6b and the outer ring 6a after the star wheel 6b is matched into the outer ring 6a, the rolling body 6c is matched into the wedge gap, the spring 6e is located in the mounting hole in the star wheel 6b, one end of the push rod 6d is located in the mounting hole and abuts against the spring 6e, the other end of the push rod 6d is matched with the rolling body 6c, and the shaft 6f is fixed with the star wheel 6 b.

With the above structural arrangement, the present embodiment has the following operation modes;

1. single motor driven mode of operation

A rotor 2a of the first motor 2 rotates to drive the wheel hubs 1 connected together to rotate together, so as to drive a vehicle; at this time, the first carrier 4b rotates together with the hub 1 and the rotor 2a, the torque of the first carrier 4b is transmitted to the shaft 6f through the first planetary gear 4d and the first sun gear 4a in sequence, so that the shaft 6f rotates, and when the shaft 6f and the driving planetary gear 6b rotate counterclockwise (as viewed in fig. 2), the outer ring 6a and the planetary gear 6b are in the disconnected state, that is, the automatic opening and coupling device 6 is in the disconnected state, because the rotating speed of the planetary gear 6b is higher than that of the outer ring 6a, the rolling bodies 6c are released from the wedge gaps, and the outer ring 6a and the planetary gear 6b are disconnected. The torque of the first planetary gear set 4 cannot be transmitted to the second electric machine 5 by the automatic disconnecting and connecting device 6, the first planetary gear set 4 idles without load, and the automatic disconnecting and connecting device 6 does not transmit torque, i.e. allows a difference in rotational speed between the first sun gear 4a of the first planetary gear set 4 and the rotor 5b of the second electric machine 5, and specifically, makes the rotor 5b of the second electric machine 5 stationary. The mode adapts to the working condition of medium and low load so as to improve the load rate of a single motor, enable the motor to work in a high-efficiency interval and reduce energy consumption.

2. Double-motor parallel driving working mode

The first motor 2 and the second motor 5 are both in an electrically driven state; a rotor 2a of the first motor 2 rotates to drive the wheel hubs 1 connected together to rotate together, so as to drive a vehicle; the rotor 5b of the second electric machine 5 rotates, when the shaft 6f is driven by the first sun gear 4a to rotate, the shaft 6f and the driving star gear 6b rotate counterclockwise (as viewed in the figure), the outer ring 6a is driven by the rotor 5b of the second electric machine 5 to rotate counterclockwise, when the rotating speed of the outer ring 6a is greater than that of the star gear 6b, the rolling bodies 6c are clamped between the outer ring 6a and the star gear 6b under the action of friction force, and at the moment, the outer ring 6a and the star gear 6b are in a combined state, namely, the automatic opening and combining device 6 is in a combined state. The torque output by the second motor 5 is transmitted to the sun gear 4a of the first planetary row 4 through the automatic disconnection and combination device 6, the first planetary row 4 outputs to the hub 1 through the first planet carrier 4b after finishing speed reduction and torque increase, at the moment, the power of the first motor 2 and the power of the second motor 5 are coupled, and the first motor 2 and the second motor 5 are in a parallel driving state. The working condition adapts to the working condition of medium and high load, the first planet row 4 is utilized to realize speed reduction and torque increase, the second motor 5 is enabled to realize miniaturization design, the efficient interval can be optimized, and energy consumption is reduced while large power is provided.

3. Working mode of backing

The rotor 2a of the first motor 2 rotates reversely to drive the connected hubs 1 to rotate together, and then the vehicle is driven.

4. Braking energy recovery working mode

When the vehicle is decelerated or braked, the first motor 2 is switched from the driving state to the power generation state, so that kinetic energy loss during vehicle braking is converted into electric energy to charge the battery, and energy consumption is reduced.

5. When the vehicle speed is high, the second motor 5 does not need to participate in driving, the automatic disconnection and combination device 6 idles, and the second motor 5 is static, so that the second motor is prevented from being dragged to generate high back electromotive force.

The present invention is not limited to the above-described embodiment, as shown in fig. 3, for example, in order to improve the dynamic performance of the system, the present invention may be configured such that a transmission is provided on the first carrier 4b or the first sun gear 4a on the basis of the above-described first embodiment.

Preferably, the transmission means is a second planetary row 7, the second planetary row 7 being located between the first planetary row 4 and the automatic opening and coupling means 6, the second planetary row 7 being connected to the housing 3 or to the stator 2a of the first electric machine 2, to the first planetary row 4 and to the automatic opening and coupling means 6, respectively.

The second planet row 7 comprises a second sun gear 7a, a second planet carrier 7b, a second ring gear 7c and a second planet gear 7d, the second ring gear 7c is connected with the stator 2b of the first motor 2, the second planet carrier 7b is connected with the first planet row 4, the second planet carrier 7b is also connected with the second planet gear 7d, the second planet gear 7d is respectively matched with the second sun gear 7a and the second ring gear 7c, and the second sun gear 7a is connected with the automatic disconnection and combination device 6.

The above is a detailed description of the present technical solution, it should be understood that due to the limitations of the words and the diversity of the technical solutions, a person skilled in the art can implement the technical solution by using the words, syntax or other equivalent alternatives of the technical solution, and therefore, such alternatives should be considered as being within the scope of the present application.

Claims

1. The time-sharing parallel hub driving system comprises a hub (1), a first motor (2), a first planet row (4) and a second motor (5), wherein a rotor (2 a) of the first motor (2) is connected with the hub (1), the first planet row (4) is connected with the hub (1) or the rotor (2 a) of the first motor (2), and the first planet row (4) is also connected with a stator (2 b) or a shell (3) of the first motor (2), and is characterized by further comprising an automatic disconnecting and combining device (6), wherein the automatic disconnecting and combining device (6) is respectively connected with the first planet row (4) and the second motor (5);

when the first motor (2) works to directly provide torque for the hub (1), the hub (1) or a rotor (2 a) of the first motor (2) drives the first planet row (4) to rotate, the automatic disconnecting and connecting device (6) is in an automatic disconnecting state, the automatic disconnecting and connecting device (6) idles, and the second motor (5) is in a static state;

when the first motor (2) and the second motor (5) work, the first motor (2) directly provides torque for the hub (1), the hub (1) or a rotor (2 a) of the first motor (2) drives the first planet row (4) to rotate, the second motor (5) provides torque for the automatic disconnection and combination device (6) to enable the automatic disconnection and combination device (6) to be automatically combined, the torque output by the second motor (5) is transmitted to the first planet row (4) through the automatic disconnection and combination device (6), and the torque of the first motor (2) is coupled with the torque of the second motor (5) and then transmitted to the hub (1) through the first planet row (4).

2. Time-sharing parallel hub driving system according to claim 1, wherein the first planet row (4) comprises a first sun gear (4 a), a first planet carrier (4 b), a first ring gear (4 c) and a first planet gear (4 d), the first ring gear (4 c) is connected with the stator (2 b) of the first motor (2), the first planet carrier (4 b) is connected with the hub (1) or the rotor (2 a) of the first motor (2), the first planet carrier (4 b) is further connected with the first planet gear (4 d), the first planet gear (4 d) is respectively matched with the first sun gear (4 a) and the first ring gear (4 c), and the first sun gear (4 a) is connected with the automatic disconnecting and connecting device (6).

3. The time-sharing parallel hub driving system according to claim 1, wherein the automatic disconnecting and connecting device (6) comprises an outer ring (6 a), a star wheel (6 b), a rolling body (6 c), a push rod (6 d), a spring (6 e) and a shaft (6 f), wherein an opening is arranged on the circumferential surface of the star wheel (6 b), a mounting hole corresponding to the opening is further arranged on the star wheel (6 b), and after the star wheel (6 b) is fitted into the outer ring (6 a), a wedge gap is formed between the star wheel (6 b) and the outer ring (6 a), the rolling body (6 c) is matched in the wedge gap, the spring (6 e) is located in a mounting hole in the star wheel (6 b), one end of the ejector rod (6 d) is located in the mounting hole and abuts against the spring (6 e), the other end of the ejector rod (6 d) is matched with the rolling body (6 c), and the shaft (6 f) is fixed with the star wheel (6 b).

4. A time-shared parallel hub drive system according to any one of claims 1 to 3, further comprising a second planetary row (7) for speed change, the second planetary row (7) being located between the first planetary row (4) and the automatic disconnecting and coupling device (6), the second planetary row (7) being connected to the housing (3) or the stator (2 b) of the first electric machine (2), the first planetary row (4) and the automatic disconnecting and coupling device (6), respectively.

5. Time-shared parallel hub drive system according to claim 4, characterized in that the second planetary row (7) comprises a second sun gear (7 a), a second planet carrier (7 b), a second ring gear (7 c), second planet gears (7 d), the second ring gear (7 c) being connected to the stator (2 b) or the housing (3) of the first electrical machine (2), the second planet carrier (7 b) being connected to the first planetary row (4), the second planet carrier (7 b) being further connected to the second planet gears (7 d), the second planet gears (7 d) being in engagement with the second sun gear (7 a) and the second ring gear (7 c), respectively, the second sun gear (7 a) being connected to the automatic disconnection and connection means (6).