CN210087980U

CN210087980U - Electronic parking electric actuator

Info

Publication number: CN210087980U
Application number: CN201920367036.1U
Authority: CN
Inventors: 钱国年; 江滔
Original assignee: NINGBO GAOFA AUTOMOBILE CONTROL SYSTEM CO Ltd
Current assignee: NINGBO GAOFA AUTOMOBILE CONTROL SYSTEM CO Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2020-02-18
Anticipated expiration: 2029-03-21

Abstract

The utility model provides an electron parking electric actuator belongs to electron parking ware's executive component, include: the motor is connected with the worm, the output shaft is arranged on the worm wheel, a Hall sensing unit is arranged in the shell and is positioned above the output shaft; the utility model has the advantages that: the single-stage speed ratio is higher, and the volume is less, and noise and vibration are less.

Description

Electronic parking electric actuator

Technical Field

The utility model belongs to the technical field of the executive component of electron parking ware, a electron parking electric actuator is related to.

Background

Motor vehicles are all equipped with parking systems, prevent that the vehicle from slipping after stopping, and traditional parking system is manually operation, commonly called "manual brake", and when the car of assembling the manual brake was started on the slope, the driver need manually release the manual brake to cooperate accelerator pedal, clutch etc. to start the car, the mode of "manual brake" has higher requirements to driver's driving level.

With the development of technology, an electric parking system (EPB) gradually replaces a conventional mechanical hand Brake, and the existing EPB system drives a caliper and a Brake disc to Brake through an electric actuator, the actuator usually includes a motor providing driving force and a reduction transmission mechanism, and the high-speed rotation of the motor is greatly reduced after passing through the reduction transmission mechanism.

For example, a chinese patent with application number 201510798720.1 discloses an electronic parking brake actuator, which is configured to define a relative position between a motor and a planetary gear set by a retainer cooperating with a first mounting cavity and a second mounting cavity in a housing, so as to ensure a constant distance between the motor and the planetary gear set and a parallel central axis, thereby increasing the structural strength of the actuator.

However, the above-mentioned electronic parking brake actuator has a single-stage speed ratio, is relatively low in noise and vibration, and occupies a relatively large space, so that there is a certain improvement space.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide an electron parking electric actuator.

The purpose of the utility model can be realized by the following technical proposal: an electronic parking electric actuator comprising: the worm wheel and the worm are arranged in the shell, the worm wheel is meshed with the worm, the motor is connected with the worm, the output shaft is arranged on the worm wheel, a Hall sensing unit is arranged in the shell and is located above the output shaft.

Preferably, the housing includes a lower cover, a middle cover and an upper cover, the middle cover is connected to the lower cover, the upper cover is connected to the middle cover, the worm wheel and the worm are both disposed in the lower cover, the output shaft is disposed on the worm wheel in a penetrating manner, and two ends of the output shaft are disposed on the lower cover and the middle cover in a penetrating manner respectively.

Preferably, the hall sensing unit comprises a PCB, the PCB is fixed on the top of the middle cover, and a magnetic steel sleeve is sleeved on the top end of the output shaft and positioned in the middle cover.

Preferably, the upper cover is connected with a signal output port, and the signal output port is electrically connected with the PCB.

Preferably, the motor is provided with a connecting seat, the connecting seat is provided with a screw, and the motor is fixed on the lower cover through the screw.

Preferably, the middle cover is provided with a threaded hole, the magnetic steel sleeve penetrates through the threaded hole, a cover-shaped sealing cover is connected to the threaded hole, and the sealing cover is located between the magnetic steel sleeve and the PCB.

Compared with the prior art, the beneficial effects of the utility model are that:

the single-stage speed ratio is higher, the volume is smaller, and the noise and the vibration are smaller; the structure is ingenious, and the use is very reliable.

Drawings

Fig. 1 is a schematic view of the connection relationship between the worm wheel and the worm according to the present invention.

Fig. 2 is a schematic structural diagram of the output shaft of the present invention.

Fig. 3 is a schematic structural diagram of the electronic parking electric actuator of the present invention.

In the figure, 100, the housing; 110. a lower cover; 120. a middle cover; 130. an upper cover; 140. a threaded hole; 150. a sealing cover; 200. a worm gear; 300. a worm; 400. a motor; 410. a connecting seat; 420. a screw; 500. an output shaft; 510. a magnetic steel sleeve; 600. a PCB board; 700. and a signal output port.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, 2, and 3, an electric actuator for electronic parking includes: the motor comprises a shell 100, a worm wheel 200, a worm 300, a motor 400 and an output shaft 500, wherein the worm wheel 200 and the worm 300 are arranged in the shell 100, the worm wheel 200 is meshed with the worm 300, the motor 400 is connected with the worm 300, the output shaft 500 is arranged on the worm wheel 200, a Hall sensing unit is arranged in the shell 100 and is positioned above the output shaft 500.

The electronic parking electric actuator is a vehicle accessory which can switch between a parking gear and an initial gear, and the conventional actuator usually adopts a gear structure transmission or a belt pulley transmission, so that various defects exist.

Preferably, the housing 100 is a relatively complex housing structure, the worm wheel 200 and the worm 300 are disposed in the housing 100, and the motor 400 is coupled with the worm 300, when the motor 400 is started, the worm 300 rotates, and at this time, the worm wheel 200 rotates, when the worm wheel 200 rotates, the output shaft 500 also rotates, and the output shaft 500 actually has a magnet, when the output shaft 500 rotates, the hall sensing unit can sense the rotation angle of the output shaft 500, so as to send an execution signal, specifically, when the output shaft 500 rotates α degrees, the hall sensing unit can send a parking signal, and when the output shaft 500 rotates β degrees, the hall sensing unit can send an initial gear signal.

In addition, because the actuator realizes signal execution by matching the structure of the worm wheel 200 and the worm 300 with the Hall sensing principle, the single-stage speed ratio is higher, the whole volume is compact, the occupied space is smaller, and the noise and the vibration of the worm wheel 200 and the worm 300 during working are smaller.

As shown in fig. 1, 2 and 3, in addition to the above embodiment, the housing 100 includes a lower cover 110, a middle cover 120 and an upper cover 130, the middle cover 120 is connected to the lower cover 110, the upper cover 130 is connected to the middle cover 120, the worm wheel 200 and the worm 300 are both disposed in the lower cover 110, the output shaft 500 is inserted into the worm wheel 200, and both ends of the output shaft 500 are inserted into the lower cover 110 and the middle cover 120, respectively.

Preferably, the housing 100 is substantially a closed structure, the lower cover 110 is similar to a seat body and is used for mounting the worm wheel 200, the worm 300 and the output shaft 500, specifically, the worm wheel 200 is horizontally arranged in the lower cover 110, the worm 300 is inserted into a tubular portion of the lower cover 110 and is engaged with the worm wheel 200, the middle cover 120 is substantially a ring-shaped structure and is assembled with the lower cover 110, the output shaft 500 is vertically inserted into a shaft hole of the worm wheel 200, and two ends of the output shaft 500 are respectively connected with the lower cover 110 and the middle cover 120 through bearings, so that the worm wheel 200 and the output shaft 500 can normally rotate.

As shown in fig. 1, 2 and 3, on the basis of the above embodiment, the hall sensing unit includes a PCB 600, the PCB 600 is fixed on the top of the middle cover 120, and the top end of the output shaft 500 is sleeved with a magnetic steel sleeve 510, and the magnetic steel sleeve 510 is located in the middle cover 120.

Preferably, the hall sensing unit is a PCB 600, the PCB 600 can sense a rotation angle of the magnetic steel sleeve 510, further, the magnetic steel sleeve 510 is fixed at the top end of the output shaft 500 and is located in the middle cover 120, when the output shaft 500 rotates, the magnetic steel sleeve 510 also rotates, the PCB 600 can sense a rotation angle of the magnetic steel sleeve 510, and thus a corresponding signal is sent according to the rotation angle.

As shown in fig. 1, 2 and 3, in addition to the above embodiments, a signal outlet 700 is connected to the upper cover 130, and the signal outlet 700 is electrically connected to the PCB 600.

Preferably, the signal outlet 700 has a plurality of pins that can be connected to corresponding plugs for signal transmission purposes.

As shown in fig. 1, 2 and 3, in addition to the above embodiments, the motor 400 is provided with a connecting seat 410, the connecting seat 410 is provided with a screw 420, and the motor 400 is fixed to the lower cover 110 by the screw 420.

Preferably, the motor 400 is fixedly connected with the lower cover 110, wherein the left and right sides of the motor 400 are provided with connecting seats 410, the connecting seats 410 are provided with screws 420, the screws 420 are connected on the lower cover 110, so that the motor 400 is fixedly connected with the lower cover 110, and the output shaft 500 of the motor 400 passes through the lower cover 110 and is connected with the worm 300.

As shown in fig. 1, 2 and 3, in the above embodiment, the middle cover 120 is opened with a screw hole 140, the magnetic steel sleeve 510 is inserted into the screw hole 140, and the screw hole 140 is connected with a cover-shaped sealing cover 150, and the sealing cover 150 is located between the magnetic steel sleeve 510 and the PCB 600.

Preferably, the magnetic steel sleeve 510 and the PCB 600 are separated, so that a sealing environment of the upper cover 130 is ensured, and dust or other impurities are prevented from affecting the PCB 600, and therefore the middle cover 120 needs to be sealed, and after the sealing cover 150 is provided, a hall sensing effect can be formed between the magnetic steel sleeve 510 and the PCB 600, and the dust or impurities cannot enter the upper cover 130.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An electronic parking electric actuator, comprising: the worm wheel and the worm are arranged in the shell, the worm wheel is meshed with the worm, the motor is connected with the worm, the output shaft is arranged on the worm wheel, a Hall sensing unit is arranged in the shell and is located above the output shaft.

2. The electronic parking electric actuator as claimed in claim 1, characterized in that: the shell comprises a lower cover, a middle cover and an upper cover, the middle cover is connected to the lower cover, the upper cover is connected to the middle cover, the worm wheel and the worm are arranged in the lower cover, the output shaft penetrates through the worm wheel, and two ends of the output shaft penetrate through the lower cover and the middle cover respectively.

3. The electronic parking electric actuator as claimed in claim 2, characterized in that: the Hall sensing unit comprises a PCB which is fixed at the top of the middle cover, and a magnetic steel sleeve is sleeved at the top end of the output shaft and positioned in the middle cover.

4. The electronic parking electric actuator as claimed in claim 3, characterized in that: the upper cover is connected with a signal output port, and the signal output port is electrically connected with the PCB.

5. The electronic parking electric actuator as claimed in claim 2, characterized in that: the motor is provided with a connecting seat, the connecting seat is provided with a screw, and the motor is fixed on the lower cover through the screw.

6. The electronic parking electric actuator as claimed in claim 4, wherein: the middle cover is provided with a threaded hole, the magnetic steel sleeve penetrates through the threaded hole, a cover-shaped sealing cover is connected to the threaded hole, and the sealing cover is located between the magnetic steel sleeve and the PCB.