CN106394500B

CN106394500B - Wiper motor with liquid pump and automobile with wiper motor

Info

Publication number: CN106394500B
Application number: CN201510466448.7A
Authority: CN
Inventors: 施文辉
Original assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Current assignee: SAIC General Motors Corp Ltd; Pan Asia Technical Automotive Center Co Ltd
Priority date: 2015-08-03
Filing date: 2015-08-03
Publication date: 2020-02-28
Anticipated expiration: 2035-08-03
Also published as: CN106394500A

Abstract

The invention discloses a wiper motor with a liquid pump and an automobile provided with the wiper motor. The wiper motor includes: a torque amplifying element engaged to a first section of an intermediate shaft to amplify torque from the intermediate shaft for delivery to a wiper blade; a liquid delivery element engaged to a second section of the intermediate shaft and driven by the intermediate shaft to output a liquid; a liquid source that supplies liquid to the liquid delivery element; a drainage channel in fluid communication with the liquid delivery element to receive liquid from the liquid source output from the liquid delivery element; and a switching element arranged in the drainage channel and used for driving the switching element to switch in the drainage channel so as to guide the liquid in the drainage channel back to the liquid source. The invention can save a set of stator and rotor structure.

Description

Wiper motor with liquid pump and automobile with wiper motor

Technical Field

The invention relates to a wiper motor with a liquid pump.

The invention also relates to an automobile provided with the wiper motor.

Background

At present, the windscreen wiper on a general passenger car has two working conditions: when raining, the windscreen wiper is used for wiping the glass repeatedly to wipe off rainwater on the glass; when dust on the front windshield blocks the view, the washer continuously pumps the washing liquid to the glass, and the wiper performs reciprocating wiping movement at the same time. Therefore, two sets of mechanisms are necessary to support corresponding to the two working conditions: wiper systems and washing systems.

When a modern automobile is arranged at a part position, a wiper system is generally arranged in an air inlet channel below a front windshield, and an air inlet grille covers the upper surface of the air inlet channel. The washing system is disposed within the front engine compartment, typically near the front left or right wheel.

Both the wiper system and the washing system are electrically driven, each with a motor. The working principle of both motors is that a magnetic stator drives a coil winding (also called a rotor) driving a steering current to rotate at high speed. However, due to the difference in the functions to be realized, the two motors have a large difference in the rear end structure.

A rotor of a motor of the wiper system is integrated with a concentric worm, and the worm drives a worm wheel with a certain rotation speed ratio to obtain larger output torque. Such as the wiper motor structure shown in fig. 1. As shown, the motor includes a stator 1', a rotor 2', a worm 3', a worm wheel 4', and an output shaft 5 '. An extended worm 3 'is integrated on the rotor 2', the worm 3 'is provided with a worm wheel 4' engaged with the worm, and the output end of the worm wheel 4 'is connected with an output shaft 5' of the motor. The output shaft 5' can take the output torque increased from that via the worm-and-worm gear mechanism and deliver it to the wiper blade.

A rotor of a motor (also called a washing pump) of the washing system is integrated with a concentric connecting rod, and the tail end of the connecting rod is connected with an impeller. Such as the wash pump configuration shown in fig. 2. As shown, the motor includes a stator 1', a rotor 2', a connecting rod 3', and an impeller 4'. An extended connecting rod 3 'is integrated on the rotor 2'. An impeller 4 'is provided at the end of the connecting rod 3'. The connecting rod 3 'brings a high rotational speed to the impeller 4'. A source of washing liquid provides washing liquid to the impeller 4 'through an inlet 5', the impeller 4 'pumping washing liquid through an outlet 6' under high speed operation.

The size of the overall motor construction can be analyzed for differences in the motor specifications required for the two systems:

firstly, the motor of the wiper system mainly considers large output torque, and the motor of the washing system mainly considers large rotating speed.

Secondly, the wiper system motor is complicated, and one side of the stator shell is connected with a gear box which is specially used for arranging a worm gear and a worm and other auxiliary structures. The washing system motor is relatively simple, and the whole machine shell covers the stator, the rotor, the impeller and other mechanisms.

The existing structure has the following disadvantages:

first, because the existing wiper system and washing system are two systems and structures, two independent sets of stator and rotor are required at the same time, and two independent sets of power input are required.

Secondly, the current common arrangement mode is that a wiper motor is arranged in an air inlet channel, and a washing pump is arranged in a front cabin of an engine, so that washing liquid is conveyed to the wiper position from the front cabin position for too long, and a long section of water pipe is needed to be connected in the middle.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an integrated motor system which has the functions of a wiper system motor and a washing system motor.

The wiper motor of the liquid pump related to of the invention includes: a stator; a rotor; an intermediate shaft integrated on the rotor; this wiper motor still includes: a torque amplifying element engaged to a first section of the intermediate shaft, delivering an amplified torque from the intermediate shaft to a wiper blade; a liquid delivery element engaged to a second section of the intermediate shaft and driven by the intermediate shaft to output a liquid; a liquid source open to the liquid delivery element; a drainage channel in fluid communication with the liquid delivery element to receive liquid from the liquid source output from the liquid delivery element, wherein the drainage channel comprises an outlet in communication with an exterior and a return port in communication with the liquid source; and a switching element arranged in the drainage channel and used for driving the switching element to switch in the drainage channel so as to guide the liquid in the drainage channel to be discharged through the outlet or return to the liquid source through the return port. The wiper motor can save a set of stator and rotor structure.

Wherein the first section of the intermediate shaft is configured as a worm, the torque amplifying element being a worm wheel in mesh with the worm, the worm wheel being connected to the output shaft to drive the wiper blade with an increased torque. Additionally, the liquid transport element is an impeller mounted on a second section of the intermediate shaft.

The intermediate shaft may be arranged as follows: one end of the intermediate shaft is integrated on the rotor, a first section of the intermediate shaft is positioned at the other end of the intermediate shaft, and a second section of the intermediate shaft is arranged between the rotor and the first section; or one end of the intermediate shaft is integrated on the rotor, the second section of the intermediate shaft is positioned at the other end of the intermediate shaft, and the first section of the intermediate shaft is arranged between the rotor and the second section. The intermediate shaft integrates components of a wiper system motor and components of a washing system motor. The motor thus has both a wiper motor function and a pump function.

The switching element may comprise a one-way valve provided at a tap of the outlet and the return port to direct liquid in the drainage channel to flow to the outlet or to the return port. Or, the switching element is the ball that has the spring, the ball is located in drainage channel the export with the reposition of redundant personnel mouth of backward flow mouth, just the ball is constructed and to be blocked the export with any one in the backward flow mouth, the wiper motor still include with switching element related relay under the effect of relay, elasticity ball can the export with move between the backward flow mouth.

The invention also relates to an automobile, wherein the wiper motor with the liquid pump is arranged in the automobile.

The automobile is internally provided with a gear box, a chamber and a liquid cavity, wherein the gear box, the chamber and the liquid cavity are separated from each other; the stator, the rotor, the first section of the intermediate shaft, and the torque amplifying element of the wiper motor are disposed within the gear box, the liquid conveying element and the second section of the intermediate shaft are disposed within the chamber, and the liquid cavity is connected with the chamber through a liquid inlet passage.

The washing system is integrated on the wiper motor, so that the space for arranging the whole vehicle is saved, and a pipeline system in the middle transition is saved.

The drainage channel penetrates through an interlayer between the gear box and the liquid cavity. And, the wiper motor further includes a relay disposed within the gear box and proximate the barrier between the gear box and the fluid chamber.

The impeller structure of the liquid pump is integrated on the wiper motor, so that the wiper can act and the washing liquid can be automatically pumped to the front windshield. When the wiper needs to be independently operated without pumping washing liquid, other electric loops are switched, so that the outlet is closed without discharging liquid.

By applying the motor, two motors are combined into one motor, and the traditional washing liquid kettle is omitted in the engine compartment and is integrated on the wiper motor, so that the space of the whole vehicle is greatly increased.

The invention changes the structure of the gear box and worm of the existing motor, and can realize the whole functions of the invention by adding part of parts on the basis.

Other aspects and features of the present invention will become apparent from the following detailed description, which proceeds with reference to the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the invention, for which reference should be made to the appended claims. It should be further understood that the drawings are merely intended to conceptually illustrate the structures and procedures described herein, and that, unless otherwise indicated, the drawings are not necessarily drawn to scale.

Drawings

The present invention will be more fully understood from the detailed description given below in conjunction with the accompanying drawings, in which like reference numerals refer to like elements throughout the figures. Wherein:

fig. 1 is a schematic structural view of a wiper system motor in the prior art;

FIG. 2 is a schematic diagram of a prior art washing system motor;

fig. 3 is a schematic structural view of a wiper motor with a liquid pump according to the present invention; and

fig. 4 is an enlarged view of circle a in fig. 3.

Detailed Description

To assist those skilled in the art in understanding the claimed subject matter, a detailed description of the invention is provided below along with accompanying figures.

Fig. 3 is a schematic structural view of the wiper motor according to the present invention. The wiper motor comprises a stator 1, a rotor 2, an intermediate shaft 3, a torque amplifying element 4, a fluid conveying element 5, a flow-directing channel 8, and a switching element 9, wherein the flow-directing channel 8 and the switching element 9 will be described in detail below. The stator 1 drives the rotor 2 to rotate at a high speed. One end of the intermediate shaft 3 is integrated in said rotor 2, so that rotation of the rotor 2 causes the intermediate shaft 3 to rotate together. The intermediate shaft 3 comprises at least a first section 31 and a second section 32. The torque amplifying element 4 engages a first section 31 of the intermediate shaft 3, amplifying the torque from the intermediate shaft 3 and delivering it to the wiper blade. The liquid conveying element 5 is engaged with the second section 32 of the intermediate shaft 3 and is rotated by the intermediate shaft 3 to output liquid. A liquid source 7 stores washing liquid, the liquid source 7 being open to the liquid delivery element 5 and supplying liquid. The drainage channel 8 is in fluid communication with the liquid delivery element 5 to receive liquid from the liquid source 7 output from the liquid delivery element 5.

Referring to fig. 4, the drainage channel 8 has been shown in detail. Wherein the drainage channel 8 comprises an outlet 81 and a return port 82, the outlet 81 is communicated with the outside, and the return port 82 is communicated with the liquid source 7. A switching element 9 is arranged in the drainage channel 8, said switching element 9 being actuated to move within the drainage channel 8 to direct the liquid in the drainage channel 8 to drain through an outlet 81 or to return through a return opening 82 to the liquid source 7. The switching element 9 has at least two positions in the drainage channel 8, in a first position as shown in fig. 4, in which the outlet 81 is in fluid communication with the liquid delivery element 5 due to the action of the switching element 9, the return opening 82 is blocked by the switching element 9, so that liquid flows from the liquid delivery element 5 through the drainage channel 8 to the outlet 81; when the switching element 9 is switched to the second position (not shown in the figures), the return port 82 is in fluid communication with the liquid delivery element 5, while the outlet port 81 is blocked by the switching element 9, so that liquid flows from the liquid delivery element 5 through the drainage channel 8 to the return port 82 and finally back to the liquid source 7.

Returning to fig. 3, torque multiplication from the motor to the wiper blade may be accomplished using a worm-and-gear mechanism. In particular, the first section 31 of the intermediate shaft 3 is configured in the form of a worm, and the torque amplifying element 4 is a worm wheel which meshes with the worm. The worm wheel is concentrically connected to an output shaft 6, which output shaft 6 is connected to an actuator of the wiper blade. The torque is transmitted to the output shaft 6 from the intermediate shaft 3 through the worm and the worm wheel and finally transmitted to the wiper blade to enable the wiper blade to work.

The liquid conveying element 5 may be an impeller mounted on the second section 32 of the intermediate shaft 3. Torque is transmitted by the intermediate shaft 3 to the impeller, which rotates at high speed by varying the fluid pressure from the fluid source 7 to deliver fluid.

The stator 1, the rotor 2, the first section 31 (worm) of the intermediate shaft 3 and the worm wheel thus constitute an electric motor which actuates the wiper blades. On the other hand, the stator 1, the rotor 2, the second section 32 of the intermediate shaft 3, and the impeller constitute a motor of the washing mechanism. Only one set of stator and rotor structure can realize two sets of wiper and washing systems.

The intermediate shaft 3 can be arranged as in fig. 3. One end of the intermediate shaft 3 is integrated on the rotor 2, the second section 32 of the intermediate shaft 3 is located at the other end (i.e. the end) of the intermediate shaft 3, and the first section 31 of the intermediate shaft 3 is located between the rotor 2 and the second section 32. It will be appreciated that a sealing process is required between the first section 31 and the second section 32. It is also possible to arrange the intermediate shaft 3 in another alternative way, i.e. again with one end of the intermediate shaft 3 integrated into the rotor 2, while the first section 31 of the intermediate shaft 3 is located at the other end (i.e. the end) of the intermediate shaft 3 and the second section 32 of the intermediate shaft 3 is located between the rotor 2 and the first section 31. Similarly, a sealing process is performed between the first section 31 and the second section 32.

The switching element 9 may be a one-way valve provided at a tap opening leading to the outlet 81 and the return opening 82 to direct the liquid in the drainage channel 8 to flow to the outlet 81 or to the return opening 82. The one-way valve has at least two states, and by controlling the valve, in one state, the water outlet is communicated with the liquid conveying element 5, meanwhile, the return port 82 is closed, and liquid flows from the liquid conveying element 5 to the outlet 81 through the drainage channel 8 until being discharged; in another state, the return opening 82 is connected to the fluid delivery element 5, while the outlet 81 is closed, and fluid flows from the fluid delivery element 5 via the drainage channel 8 to the return opening 82 and back to the fluid source 7.

Alternatively, the switching element 9 may be of the form shown in fig. 4. The switching element 9 is a ball 91 with a spring 92 at the branching point of the outlet 81 and the return 82. The ball 91 is configured to block either one of the outlet 81 and the return port 82. The ball 91 and the spring 92 are arranged in a direction along one of the branched outlets, such as along the outlet 81 or along the return opening 82. In the present embodiment, the direction of the outlet 81 is at right angles to the direction of the return port 82. The ball 91 and the spring 92 are provided in the direction of the return port 82. The ball 91 extends into and out of the return port 82, so that the flow direction in the drainage channel 8 can be switched. Once the ball 91 enters the return port 82, the return port 82 is blocked, and when the ball 91 exits from the return port 82, the direction leading to the outlet 81 is blocked. Of course, the ball 91 and the spring 92 may be disposed along the outlet 81. In addition, a relay 10 is additionally provided in association with the ball 91. The working state of the elastic ball 91 depends on the relay 10, and the elastic ball 91 can move between the outlet 81 and the return port 82 under the action of the relay 10. When the relay 10 is de-energized, under the action of the restoring force of the spring 92, the ball 91 blocks the return port 82, and at the moment, the liquid in the drainage channel 8 is discharged through the outlet 81; when the relay 10 is energized, the ball 91 is drawn close to the relay 10, i.e. out of the return 82, while blocking the outlet 81, and the fluid of the drainage channel 8 can only enter the fluid source 7 through the return 82. The flow direction in the drainage channel 8 can be guided by simply adding the spring 92, the ball 91, and the relay 10.

It will be appreciated that if the positions of the outlet 81 and return 82 are changed (e.g., interchanged), only the power-on and power-off logic of the relay 10 need be changed.

For automobiles, the system of the wiper motor according to the present invention may be arranged as described below. Within the vehicle, the gear case 12, the chamber 13 and the fluid chamber 70 are disposed adjacent to and spaced apart from one another. Chamber 13 is the impeller chamber. The liquid chamber 70 is the washing liquid chamber in which the liquid source 7 is located. The impeller chamber 13 and the washing liquid chamber 70 are disposed at one side of the gear case 12. Sealing elements such as sealing rings are additionally arranged between the gear box 12 and the impeller chamber 13 to play a role of sealing. A barrier is provided between the gear housing 12 and the wash liquor chamber 70.

In the case of a wiper motor in which one end of the intermediate shaft 3 is integrated in the rotor 2, the second section 32 of the intermediate shaft 3 is the other end of the intermediate shaft 3, the first section 31 is located between the second section 32 and the rotor 2, the first section 31 corresponds to a worm, the torque amplification element 4 is a worm wheel, and the liquid conveying element 5 is an impeller, the stator 1, the rotor 2, the worm, and the worm wheel are arranged in the gear housing 12, the impeller and the second section 32 of the intermediate shaft 3 are arranged in the impeller chamber 13, and the washing liquid chamber 70 is connected to the impeller chamber 13 via the liquid inlet channel 11. The drain channel 8 passes through the partition between the gear box 12 and the wash liquor chamber 70. The return port 82 of the drain passage 8 communicates with the washing liquid chamber 70, and the outlet 81 of the drain passage 8 opens to the outside.

The relay 10 of the wiper motor is disposed within the gear case 12 and near the partition between the gear case 12 and the wash liquid chamber 70. The wall of the gearbox 12 adjacent to the impeller is provided with a line for the passage of liquid. The relay 10 is on one side of the pipeline. A spring 92 and a ball 91 are provided in the conduit at the location of the split between the outlet 81 and the return 82 of the drainage channel 8.

The working process of the wiper motor related by the invention is as follows: a stator 1 of the motor drives a rotor 2 to rotate at a high speed, and a worm coaxially connected with the rotor 2 simultaneously drives a worm wheel on the side and an impeller at the tail end to rotate; the worm gear is connected with an output shaft 6 of the wiper motor to drive the wiper blade to normally wipe; the rotation of the impeller pumps the washing liquid stored in the washing liquid chamber 70 from the liquid inlet passage 11 to the flow guide passage 8; when the owner executes the rain working condition, the relay 10 is electrified to attract the ball 91 with the spring 92 to approach, the ball 91 blocks the outlet 81, and the washing liquid returns to the washing liquid cavity 70 from the drainage channel 8 through the return port 82; when the owner executes the dust working condition, the relay 10 is powered off, the ball 91 returns to the original position under the action of the spring force to block the return opening 82, and the washing liquid is sprayed out from the drainage channel 8 through the outlet 81.

While specific embodiments of the invention have been shown and described in detail to illustrate the principles of the invention, it will be understood that the invention may be embodied otherwise without departing from such principles.

Claims

1. A wiper motor with a liquid pump, comprising:

a stator (1);

a rotor (2);

an intermediate shaft (3), the intermediate shaft (3) being integrated on the rotor (2); characterized by wiper motor still includes:

a torque amplifying element (4), said torque amplifying element (4) engaging a first section (31) of said intermediate shaft (3) to amplify the torque from said intermediate shaft (3) for delivery to a wiper blade;

a liquid conveying element (5), the liquid conveying element (5) being engaged with the second section (32) of the intermediate shaft (3) and being driven by the intermediate shaft (3) to output liquid;

a liquid source (7), the liquid source (7) supplying liquid to the liquid delivery element (5);

a drainage channel (8), the drainage channel (8) being in fluid communication with the liquid delivery element (5) to receive liquid from the liquid source (7) output from the liquid delivery element (5), wherein the drainage channel (8) comprises an outlet (81) and a return port (82), the outlet (81) communicating with the outside and the return port (82) communicating with the liquid source (7); and

a switching element (9) arranged in the drainage channel (8), the switching element (9) being driven to switch in the drainage channel (8) to guide the liquid in the drainage channel (8) to be discharged through the outlet (81) or to return to the liquid source (7) through the return opening (82),

wherein the liquid cavity in which the liquid source is arranged is adjacent to the gear box in which the torque amplifying element is arranged, and the drainage channel (8) penetrates through a separation layer between the gear box (12) and the liquid cavity (70);

the wiper motor further comprises a relay (10) associated with the switching element (9), the relay (10) being disposed within the gear box (12) and proximate to a barrier between the gear box (12) and the liquid chamber (70).

2. The wiper motor of claim 1 wherein: the first section (31) of the intermediate shaft (3) is configured as a worm, the torque amplifying element (4) being a worm wheel engaging with the worm, the worm wheel being connected to an output shaft (6) for driving the wiper blade.

3. The wiper motor of claim 1 wherein: the liquid conveying element (5) is an impeller mounted on a second section (32) of the intermediate shaft (3).

4. The wiper motor of claim 1 wherein: one end of the intermediate shaft (3) is integrated on the rotor (2), a first section (31) of the intermediate shaft (3) is located at the other end of the intermediate shaft (3), and a second section (32) of the intermediate shaft (3) is arranged between the rotor (2) and the first section (31); or one end of the intermediate shaft (3) is integrated on the rotor (2), the second section (32) of the intermediate shaft (3) is located at the other end of the intermediate shaft (3), and the first section (31) of the intermediate shaft (3) is arranged between the rotor (2) and the second section (32).

5. The wiper motor of claim 1 wherein: the switching element (9) comprises a one-way valve which is arranged in the drainage channel (8) and leads to a branch of the outlet (81) and the return (82) opening, in order to guide the liquid in the drainage channel (8) to flow to the outlet (81) or to the return (82) opening.

6. The wiper motor of claim 1 wherein: the switching element (9) is a ball (91) with a spring (92), the ball (91) is positioned in the drainage channel (8) at the outlet (81) and the flow dividing port of the backflow port (82), the ball (91) is constructed to be capable of blocking any one of the outlet (81) and the backflow port (82), and under the action of the relay (10), the ball (91) can move between the outlet (81) and the backflow port (82).

7. An automobile, characterized in that: the motor vehicle is provided with a wiper motor with a liquid pump according to any one of claims 1 to 6.

8. The vehicle of claim 7, wherein: the automobile is internally provided with a gear box (12), a chamber (13) and a liquid cavity (70) which are separated from each other; the stator (1), the rotor (2), the first section (31) of the intermediate shaft (3) and the torque amplification element (4) of the wiper motor are arranged in the gear box (12), the liquid conveying element (5) and the second section (32) of the intermediate shaft (3) are arranged in the chamber (13), and the liquid chamber (70) is connected with the chamber (13) through a liquid inlet channel (11).