CN111055812B

CN111055812B - Windscreen wiper

Info

Publication number: CN111055812B
Application number: CN201911398974.9A
Authority: CN
Inventors: 李才波; 黄广强; 何黎明
Original assignee: Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2019-12-30
Filing date: 2019-12-30
Publication date: 2022-08-12
Anticipated expiration: 2039-12-30
Also published as: CN111055812A

Abstract

The application discloses a windscreen wiper, which relates to the technical field of automobiles and comprises a wiping arm seat and a wiping arm which are connected, wherein a motor is arranged on the wiping arm seat, the motor is connected with a connecting rod, and the motor is configured to drive the connecting rod to be far away from or close to the motor; a scraping blade is arranged at one end of the scraping arm far away from the scraping arm seat, and a cam is arranged at one end of the scraping arm close to the scraping arm seat; one end of the connecting rod, which is far away from the motor, is provided with a rolling part, and the rolling part moves along the outer edge of the cam, so that the scraping arm drives the scraping blade to be far away from or close to the windshield glass. The wiper disclosed by the application can lift the wiper arm when the wiper is not used, and the wiper blade is driven to be separated from windshield glass, so that the service life of the wiper blade is prolonged.

Description

Windscreen wiper

Technical Field

The application relates to the technical field of automobiles, in particular to a windscreen wiper.

Background

A wiper blade of an automobile is a sheet type structure installed in front of a windshield glass. The windscreen wiper can clean the windscreen in rainy days or when dust exists on the windscreen, so that a driver has a good view.

In the related art, a wiper blade for an automobile is generally composed of a motor wiper arm and a blade. The motor drives the wiper arm to move, so that the wiper blade is driven to clean the windshield glass. When the windscreen wiper is not used, the scraping blade can also keep deforming for a long time under the action of pressure applied by the windscreen wiper arm so as to maintain the stability of the windscreen wiper on an automobile.

In the course of implementing the present application, the inventors found that the related art has at least the following problems: the long-time adhesion of the scraping sheet on the windshield can cause the scraping sheet to generate permanent deformation and be frozen on the windshield at a lower temperature, so that the service life is reduced; the long-time laminating of doctor-bar can lead to piling up hard particulate matter in doctor-bar department on windshield, and the particulate matter of piling up can damage the doctor-bar thereby reduces its life.

Disclosure of Invention

The embodiment of the application provides a windscreen wiper, which can lift up a windscreen wiper arm when the windscreen wiper is not used, so that the service life of a wiper blade is prolonged. The specific technical scheme is as follows:

the embodiment of the application provides a windscreen wiper, which comprises a wiping arm seat and a wiping arm which are connected, wherein,

the scraping arm seat is provided with a motor, the motor is connected with a connecting rod, and the motor is configured to drive the connecting rod to be far away from or close to the motor;

a scraping blade is arranged at one end of the scraping arm far away from the scraping arm seat, and a cam is arranged at one end of the scraping arm close to the scraping arm seat;

and a rolling part is arranged at one end of the connecting rod, which is far away from the motor, and the rolling part moves along the outer edge of the cam, so that the scraping arm drives the scraping blade to be far away from or close to the windshield glass.

In one implementation manner of the embodiment of the present application, a bottom surface of the cam is a plane, and the bottom surface is fixedly disposed on a side surface of the scraping arm facing the windshield glass;

the outer edge of the cam is in the shape of an arc that is concave toward the rolling member.

In one implementation manner of the embodiment of the application, a guide groove is formed in the outer edge of the cam, and the rolling member moves along the guide groove.

In one implementation manner of the embodiment of the application, the connecting rod is connected with the scraping arm through an elastic device;

the resilient device is configured to: when the connecting rod moves in the direction far away from the motor, the tension of the elastic device is reduced; when the connecting rod moves towards the direction close to the motor, the tensile force of the elastic device is increased.

In one implementation of the embodiment of the present application, the link includes a bent portion bent toward the wiper arm;

the bending part is provided with a fixing part, and the fixing part is connected with one end of the elastic device.

In one implementation manner of the embodiment of the application, a retainer is further arranged on the scraper arm seat, and the retainer is arranged above the motor;

the link passes through the inside of the cage configured to hold the link in a linear motion.

In an implementation manner of the embodiment of the application, a groove is formed in one end, connected with the rolling part, of the connecting rod, and a part of the rolling part extends into the groove;

the rolling element is a bearing, a shaft sleeve is arranged on the inner side of the bearing, and the shaft sleeve is fixedly connected with the side wall of the groove.

In an implementation manner of the embodiment of the application, the scraping arm is connected with the scraping arm seat through a rotating shaft;

the wiper arm is rotatable about the pivot axis so as to move away from or towards the windscreen.

In one implementation of the embodiments of the present application, the electric machine is configured to operate in accordance with a control signal received from a body controller.

In an implementation manner of the embodiment of the application, the connecting rod is provided with a thread at one end connected with the motor, and the connecting rod is in screw transmission with the motor.

The beneficial effects of the embodiment of the application at least comprise:

the wiper that this application embodiment provided is provided with the cam scraping the arm and is close to the one end of scraping the arm seat, and the motor drive connecting rod is kept away from or is close to the motor, makes the rolling piece of connecting rod one end can follow the outer edge removal of cam to can lift scraping the arm when not using the wiper, drive the doctor-bar and break away from windshield, prolong the life of doctor-bar.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a wiper blade according to an embodiment of the present disclosure;

fig. 2 is an exploded schematic view of a wiper blade according to an embodiment of the present disclosure;

fig. 3 is a schematic view of a cam structure of a wiper blade according to an embodiment of the present disclosure.

The reference numerals denote:

1. a scraper arm seat; 2. a scraping arm; 21. a cavity; 3. scraping a blade; 4. a motor; 5. a connecting rod; 51. a first connection portion; 52. an extension portion; 53. a bending section; 54. a second connecting portion; 56. a groove; 6. a cam; 7. a rolling member; 8. a windshield glass; 9. a guide groove; 10. an elastic device; 11. a holder; 12. a shaft sleeve; 13. a rotating shaft; 14. a wiper output shaft; 15. riveting; 16. a fixing member; 161. a first side wall; 162. a second side wall; 163. a third side wall.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the following detailed description of the embodiments of the present application will be made with reference to the accompanying drawings.

The embodiment of the present application provides a wiper blade, which includes a wiper arm base 1 and a wiper arm 2 connected to each other, as shown in fig. 1. The end of the scraping arm 2 far away from the scraping arm seat 1 is provided with a scraping blade 3, and the end of the scraping arm 2 close to the scraping arm seat 1 is provided with a cam 6. The scraper arm seat 1 is provided with a motor 4, the motor 4 is connected with a connecting rod 5, and the motor 4 is configured to drive the connecting rod 5 to move away from or close to the motor 4. In the embodiment of the application, the direction away from the motor 4 is the direction towards the roof along the plane of the windshield 8, and the direction close to the motor 4 is the direction towards the bottom of the vehicle along the plane of the windshield 8.

One end of the connecting rod 5, which is far away from the motor 4, is provided with a rolling part 7, and the rolling part 7 moves along the outer edge of the cam 6, so that the scraping arm 2 drives the scraping blade 3 to be far away from or close to the windshield glass 8.

In the embodiment of the present application, as shown in fig. 1, one end of the wiper arm base 1 may be connected to the wiper arm 2, and the other end may be connected to the wiper output shaft 14. The wiper output shaft 14 is used to drive the wiper arm mount 1, so that the wiper arm 2 moves the wiper blade 3 over the windscreen 8. The connecting part of the wiper arm base 1 and the wiper arm 2 can be provided with a rotating shaft 13, the axial direction of the rotating shaft 13 is horizontally arranged, and the rotating shaft 13 is parallel to the plane of the windshield glass 8. The scraping arm 2 is connected with the scraping arm seat 1 through a rotating shaft 13, and the scraping arm 2 can rotate around the rotating shaft 13 to drive the scraping blade 3 to be far away from or close to the windshield glass 8.

In the embodiment of the present application, as shown in fig. 2, the bottom surface of the cam 6 may be a flat surface, and the bottom surface may be fixedly provided on the side of the wiper arm 2 facing the windshield 8. Specifically, as shown in fig. 3, the wiper arm 2 is provided with a cavity 21 having one side opened, and the open side of the cavity 21 faces the windshield 8. The bottom surface of the cam 6 is fixedly arranged on the bottom wall of the cavity 21 facing the windscreen 8 (opposite the opening). The connection between the cam 6 and the wiper arm 2 may be a welded or bolted connection. In other embodiments of the present application, the wiper arm may include a top wall and two side walls perpendicular to the top wall. The end of the two side walls remote from the top wall faces the windscreen 8. The bottom surface of the cam is arranged on the inner side of the top wall and is fixedly connected with the top wall.

As shown in fig. 2 or 3, the outer edge of the cam 6 may be an arc shape recessed toward the rolling member 7, i.e., the thickness (distance in the direction perpendicular to the bottom surface) of the cam 6 may be gradually increased in the direction away from the motor 4. The motor 4 drives the connecting rod 5 to be far away from or close to the motor 4, so that when the rolling piece 7 at one end of the connecting rod 5 moves along the outer edge of the cam 6, the rolling piece 7 exerts pressure on the scraping arm 2 through the cam 6, so that the scraping arm 2 is lifted, and the scraping blade 3 is driven to be far away from the windshield 8. When the rolling member 7 is located at the lowest end (end close to the motor) of the cam 6, the distance between the wiper blade 3 and the windshield 8 is minimal; the distance between the blade 3 and the windscreen 8 is greatest when the rolling element 7 is at the highest end of the cam 6 (the end remote from the motor). It will be understood by those skilled in the art that the rolling member 7 is located at the uppermost end of the cam 6, at least so that the wiper blade 3 does not touch the windscreen 8. By adjusting the position of the rolling member 7 on the cam 6, the pressure between the wiper blade 3 and the windscreen 8 can be adjusted. Optionally, the arc is a quarter-circle arc. In other embodiments of the present application, the outer edge of the cam may also be straight, i.e. the thickness of the cam varies linearly.

As shown in fig. 3, the cam 6 may be provided at an outer edge thereof with a guide groove 9, and the rolling member 7 is disposed inside the guide groove 9 and moves along the guide groove 9. The two ends of the guide groove 9 may also be provided with stoppers (not shown in the figures) to prevent the rolling members 7 from sliding out of the guide groove 9 from both ends. By the cooperation between the rolling element 7 and the guide groove 9, it is ensured that the rolling element 7 always moves in the guide groove 9.

In the embodiment of the present application, as shown in fig. 2 and 3, one end of the connecting rod 5 connected to the rolling member 7 may be provided with a groove 56, and a portion of the rolling member 7 may be inserted into the groove 56. In some embodiments of the present application, the rolling elements 7 may be bearings, and the inner side of the bearings may be provided with a bushing 12. Sleeve 12 may be fixedly attached to the side walls of recess 56. Specifically, through holes (not shown) are correspondingly formed on two side walls of the groove 56, and the rivet 15 penetrates through the through holes and the shaft sleeve 12, so that the shaft sleeve 12 and the side walls are fixedly connected. The bearing is rotatable about the sleeve 12. In other embodiments of the present application, the rolling member may also be a roller or a cam.

In the embodiment of the present application, as shown in fig. 1, the link 5 includes a first connection portion 51, an extension portion 52, a bent portion 53, and a second connection portion 54 connected in this order. Wherein the extension portion 52 is a straight rod, and the bending portion 53 is bent toward the wiper arm 2. The bent portion 53 may increase a distance between the link 5 and the wiper arm 2, thereby preventing the link 5 from interfering with the movement of the wiper arm 2 when the wiper blade is in a normal operation state. Further, when the wiper blade is in a normal operating state, the bent portion 53 is located at a position not higher than the position of the rotation shaft 5. Namely, the distance in the direction of the wiper arm 2 between the curved portion 53, the second connecting portion 54 and the roller 7 and the distance between the lower end portion of the cam 6 and the rotating shaft 5 are not less.

The connecting rod 5 and the wiper arm 2 may be connected by an elastic means 10. The elastic means 10 can be used to adjust the pressure between the wiper blade 3 and the windscreen 8. When the connecting rod 5 moves away from the motor 4, the tension of the elastic device 10 is reduced, so that the pressure between the wiper 3 and the windscreen 8 is reduced; when the connecting rod 5 moves in a direction approaching the motor 4, the tension of the elastic means 10 increases, so that the pressure between the blade 3 and the windscreen 8 increases. The bending part 53 may be provided with a fixing member 16, and the fixing member 16 is connected to one end of the elastic means 10.

In some embodiments of the present application, the elastic device 10 may be a tension spring. Both ends of the tension spring can be provided with bent hook parts. One end of the tension spring is connected to the wiper arm 2, and the other end is connected to the curved portion 53. As shown in fig. 3, the fixing member 16 may include a first sidewall 161 parallel to the curved portion 53, a second sidewall 162 and a third sidewall 163 are respectively connected to both ends of the first sidewall 161, and the second sidewall 162 and the third sidewall 163 are perpendicular to the curved portion 53. The ends of the second and

third side walls

162 and 163 remote from the first side wall 161 are fixedly connected to the curved portion 53. The hook of the tension spring passes through the gap between the second and

third sidewalls

162 and 163, and the first sidewall 161 is in contact with the inner side of the hook, thereby achieving the fixed connection of the tension spring with the link 5.

In other embodiments of the present application, the fixing member may include two holes adjacently disposed on the bending portion. The bent part is hollow, and the hook part of the tension spring can penetrate into the bent part from one hole and penetrate out from the other hole, so that the tension spring is fixedly connected with the connecting rod 5. It should be noted that the connection mode between the tension spring and the scraping arm may be the same as or different from the connection mode between the tension spring and the connecting rod. In other embodiments of the present application, the elastic device may also be a rubber strip.

In the embodiment of the present application, as shown in fig. 1, the scraper arm base 1 may further be provided with a holder 11, and the holder 11 is disposed above the motor 4. The link 5 may pass through the inside of the holder 11, and the holder 11 is configured to hold the link 5 in a linear motion. The retainer 11 may be fitted over the first connecting portion 51 of the link 5 or may be fitted over the extending portion 52. Fig. 1 shows only the case where the holder 11 is fitted over the outside of the first connecting portion 51.

In some embodiments of the present application, the holder may be a frame type holder, and the first connecting portion of the connecting rod passes through an inside of the holder. In other embodiments of the present application, the holder may be provided with a longitudinal through hole in the inside, and the diameter of the through hole is slightly larger than the diameter of the connecting rod. The first connecting portion or the extension portion of the link may pass through the through hole, thereby maintaining the link to move in a straight line.

In the embodiment of the present application, the end of the connecting rod 5 connected to the motor 4 (or the first connecting portion 51) may be provided with a thread (not shown), so that a screw transmission is formed between the connecting rod 5 and the motor 4. The screw transmission is mechanical transmission which realizes the conversion of rotary motion and linear motion by screwing threads and thread surfaces. The motor 4 can be a screw rod stepping motor, and the motor 4 can be fixedly connected with the scraping arm seat 1 through a bolt. The screw transmission can realize self-locking, and when the lead angle of the screw rod (or screw thread) spiral line is smaller than the friction angle between the meshing surfaces, the motor 4 can realize self-locking.

The motor 4 can be connected with a storage battery power supply of the whole vehicle, and the storage battery power supply of the whole vehicle provides a power source for the motor 4. The reducer inside the motor 4 outputs a certain speed and moment through the output screw rod of the motor 4 to drive the connecting rod 5 to move. The forward rotation and the reverse rotation of the motor 4 can drive the connecting rod 5 to move towards the direction far away from or close to the motor 4, so that the scraping blade 3 is far away from or close to the windshield glass 8.

The electric machine 4 may also be configured to operate in accordance with Control signals received from a Body Control Module (BCM). The user can set the initial position of the blade 3 by changing the pressure between the blade 3 and the windscreen 8, wherein the initial position is the position in which the blade is in a normal operating condition. The body controller records the initial position of the blade 3 and controls the motor 4 to self-lock when the blade 3 reaches the initial position. The user can also set the raised position of the wiper blade 3 by setting the rotation time and the rotation speed of the motor 4 through the vehicle body controller, wherein the raised position is the position when the wiper blade is in the raised state. The body controller records the lifting position of the scraping blade 3 and controls the motor 4 to be self-locked when the scraping blade 3 reaches the lifting position. When the wiper is in a normal working state or a lifting state, the wiper blade 3 is in a designated position (namely an initial position or a lifting position) set by a user.

In some embodiments of the present application, a pressure sensor (not shown) may be disposed on the outer surface of the windshield 8 in contact with the blade 3, and the pressure sensor is in signal connection with the vehicle body controller. The pressure sensor is used for detecting the pressure between the wiper blade 3 and the windshield 8, and the vehicle body controller can receive pressure data of the pressure sensor and judge the position of the wiper blade 3 according to the pressure data.

The motor 4 receives a control signal of the vehicle body controller to rotate forwards, so that when the connecting rod 5 is driven to move towards the direction far away from the motor 4, the rolling piece 7 extrudes the cam 6 to move towards the direction far away from the motor 4, and drives the scraping arm 2 to be lifted, so that the scraping blade 3 is far away from the windshield 8. When the rolling member 7 reaches the highest end of the cam 6, the motor 4 generates a locked-rotor current signal. The vehicle body controller receives the locked-rotor current signal, controls the motor 4 to stop rotating, and the motor 4 is self-locked to enable the windscreen wiper to keep a lifting state. Or when the scraping piece 3 reaches the lifting position, the vehicle body controller controls the motor 4 to be self-locked, so that the windscreen wiper is kept in a lifting state.

When the motor 4 receives a control signal of the vehicle body controller and reverses, so that the connecting rod 5 is driven to move towards the direction close to the motor 4, the rolling piece 7 moves towards the direction far away from the motor 4 along the outer edge of the cam 6, and the scraping arm 2 is pressed downwards, so that the scraping blade 3 is close to the windshield 8. When the scraping blade 3 reaches the initial position, the vehicle body controller controls the motor 4 to stop rotating, the motor 4 is self-locked, and the windscreen wiper is restored to the normal working state. In some embodiments of the application, the limiting blocks at the two ends of the guide groove can also be provided with pressure sensors. When the pressure data of the pressure sensor exceeds a set value, the vehicle body controller controls the motor to stop rotating.

In other embodiments of the present application, a switch device is disposed on a center console of a vehicle, and the switch device is used to control the on/off state of a motor, so as to lift up a wiper by one key. When the switch device is turned on, the vehicle body controller receives the turn-on signal and sends a rotation control signal to the motor, and the motor starts to rotate after receiving the rotation control signal from the vehicle body controller. When the switch device is closed, the vehicle body controller receives a closing signal and sends a stop control signal to the motor, and the motor stops rotating after receiving the stop control signal from the vehicle body controller. Further, when the windscreen wiper is in a normal working state, the vehicle body controller receives an opening signal, and then the motor is controlled to rotate forwards, so that the wiper blade is far away from the windscreen. When the windscreen wiper is in a lifted state, the vehicle body controller receives an opening signal, and then the motor is controlled to rotate reversely, so that the wiper blade is close to the windscreen.

According to the windscreen wiper provided by the embodiment of the application, the cam is arranged at one end, close to the wiper arm seat, of the wiper arm, the motor drives the connecting rod to be far away from or close to the motor, and the rolling piece at one end of the connecting rod can move along the outer edge of the cam, so that the wiper arm can be lifted when the windscreen wiper is not used, the wiper blade is driven to be separated from windscreen, and the service life of the wiper blade is prolonged; and the pressure of the scraping blade is adjustable through an elastic device arranged between the connecting rod and the scraping arm. The windscreen wiper provided by the embodiment of the application is also provided with the switch device on the central console of the vehicle, so that the one-key lifting of the windscreen wiper is realized.

The above description is only exemplary of the present application and should not be taken as limiting the scope of the present application, as any modifications, equivalents, improvements and the like that are within the spirit and principle of the present application should be included in the present application.

Claims

1. A windscreen wiper is characterized by comprising a wiper arm seat (1) and a wiper arm (2) which are connected, wherein,

the scraping arm seat (1) is provided with a motor (4), the motor (4) is connected with a connecting rod (5), and the motor (4) is configured to drive the connecting rod (5) to be far away from or close to the motor (4);

the scraping arm (2) is rotatably connected with the scraping arm seat (1), a scraping blade (3) is arranged at one end, far away from the scraping arm seat (1), of the scraping arm (2), and a cam (6) is arranged at one end, close to the scraping arm seat (1), of the scraping arm (2);

a rolling part (7) is arranged at one end, far away from the motor (4), of the connecting rod (5), and the rolling part (7) moves along the outer edge of the cam (6) to enable the scraping arm (2) to drive the scraping blade (3) to be far away from or close to the windshield glass (8);

the connecting rod (5) comprises a bending part (53) bending towards the scraping arm (2), a fixing part (16) is arranged on the bending part (53), the fixing part (16) and the scraping arm (2) are connected through an elastic device (10), and the elastic device (10) is configured to: the connecting rod (5) moves in a direction away from the motor (4) so that when the scraping arm (2) is away from the windshield glass (8), the tensile force of the elastic device (10) is reduced, and the connecting rod (5) moves in a direction close to the motor (4) so that when the scraping arm (2) is close to the windshield glass (8), the tensile force of the elastic device (10) is increased.

2. The wiper blade according to claim 1, characterised in that the cam (6) has a plane bottom surface which is fixedly arranged on the side of the wiper arm (2) facing the windscreen (8);

the outer edge of the cam (6) is in an arc shape which is concave towards the rolling piece (7).

3. The wiper blade according to claim 1, wherein a guide groove (9) is provided on an outer edge of said cam (6), and said rolling member (7) moves along said guide groove (9).

4. The wiper blade of claim 1, wherein a retainer (11) is further arranged on the wiper arm base (1), and the retainer (11) is arranged above the motor (4);

the connecting rod (5) passes through the inside of the retainer (11), and the retainer (11) is configured to keep the connecting rod (5) moving in a straight line.

5. The wiper blade according to claim 1, wherein a groove (56) is provided at an end of the connecting rod (5) connected to the rolling member (7), and a portion of the rolling member (7) is inserted into the groove (56);

the rolling element (7) is a bearing, a shaft sleeve (12) is arranged on the inner side of the bearing, and the shaft sleeve (12) is fixedly connected with the side wall of the groove (56).

6. The wiper blade according to claim 1, wherein said wiper arm (2) is connected to said wiper arm base (1) by a pivot (13);

the scraping arm (2) can rotate around the rotating shaft (13) to drive the scraping blade (3) to be far away from or close to the windshield glass (8).

7. The wiper blade of claim 1,

the electric machine (4) is configured to operate in accordance with a control signal received from a vehicle body controller.

8. The windscreen wiper as set forth in claim 1, wherein a screw thread is provided at the end of said connecting rod (5) connected to said motor (4), and a screw drive is provided between said connecting rod (5) and said motor (4).