CN215170399U

CN215170399U - Non-contact position feedback engine throttle driving device

Info

Publication number: CN215170399U
Application number: CN202121308880.0U
Authority: CN
Inventors: 高宇
Original assignee: Lin'an Wanbang Technology Co ltd
Current assignee: Lin'an Wanbang Technology Co ltd
Priority date: 2021-06-11
Filing date: 2021-06-11
Publication date: 2021-12-14
Anticipated expiration: 2031-06-11

Abstract

The utility model discloses a contactless position feedback engine throttle drive arrangement, act as go-between including the throttle, driving motor, still include the motor install bin, the throttle drive wheel that acts as go-between, the position sensing circuit board, the magnet steel, the throttle flexible axle, driving motor locates in the motor install bin, the motor install bin still is equipped with the waterproof connection of being qualified for the next round of competitions, throttle drive wheel that acts as go-between is fixed with driving motor output shaft one end, the accelerator drive wheel middle part that acts as go-between is located to the magnet steel, be equipped with on the position sensing circuit board with magnet steel position complex hall angle sensor, the throttle is acted as go-between one end and can be dismantled fixedly with the throttle drive wheel, the throttle is acted as go-between the other end and is passed the through-hole of throttle flexible axle and is located outside the motor install bin. The utility model has simple structure, small occupied space, long service life of the accelerator stay wire, high waterproof grade, more reasonable structure of the new accelerator stay wire, easy replacement and convenient maintenance; the Hall angle sensor adopts a non-contact mode for measurement, so that the measurement reliability is greatly improved.

Description

Non-contact position feedback engine throttle driving device

Technical Field

The utility model relates to an automobile engine throttle drive technical field specifically is a contactless position feedback engine throttle drive arrangement.

Background

In the prior art, the position feedback of an engine throttle driving device mostly adopts a contact potentiometer, and a rotatable electric brush moves on a resistor body to obtain a position signal of a driver. In addition, the existing accelerator cable structure and the fixing mode are unreasonable, so that the accelerator cable is easy to break and is complicated to replace; the structural design of the whole driving device is poor in waterproofness and cannot reach the IP67 standard.

Therefore, a new engine throttle drive is needed to improve upon the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses an overcome prior art engine throttle driver position feedback sensor life low, installation space is big, and the throttle is acted as go-between easily to be broken and is changed loaded down with trivial details, and waterproof grade low grade problem provides a simple structure, and the throttle is acted as go-between wear-resistingly, and waterproof grade is high, easy maintenance, long service life's contactless position feedback engine throttle drive arrangement.

In order to achieve the above object, the utility model provides a following technical scheme:

a non-contact position feedback engine accelerator driving device comprises an accelerator pull wire, a driving motor, a motor mounting box, an accelerator pull wire driving wheel, a position sensing circuit board, magnetic steel and an accelerator flexible shaft, the driving motor is arranged in the motor installation box, the middle part of the accelerator flexible shaft is provided with a through hole and penetrates through and is fixedly arranged at one side of the motor installation box, the motor installation box is also provided with a waterproof outlet joint, the accelerator cable driving wheel is fixed with one end of the output shaft of the driving motor, the magnetic steel is arranged in the middle of the accelerator pull wire driving wheel, the position sensing circuit board is arranged outside the accelerator pull wire driving wheel and is spaced from the magnetic steel, the position sensing circuit board is provided with a Hall angle sensor matched with the position of the magnetic steel, one end of the accelerator pull wire is detachably fixed with the accelerator pull wire driving wheel, and the other end of the accelerator pull wire penetrates through a through hole of the accelerator flexible shaft and is arranged outside the motor installation box.

In the scheme, the accelerator pull wire driving wheel is driven to rotate by the driving motor, the accelerator pull wire is driven to move in an extending and contracting manner in the accelerator flexible shaft, finally the accelerator of the engine is driven by the accelerator pull wire, the rotating speed of the engine is controlled, the specific extending and contracting distance of the accelerator pull wire is measured by the Hall angle sensor, namely the specific extending and contracting distance of the accelerator pull wire is obtained by measuring the relative rotating angle of the magnetic steel arranged on the accelerator pull wire driving wheel and the Hall angle sensor on the position sensing circuit board; the other end of the accelerator pull wire penetrates through a through hole of the accelerator flexible shaft and is arranged outside the motor installation box, and the other end of the accelerator pull wire is connected with an engine accelerator device.

As the utility model discloses preferred scheme, driving motor be planet speed reduction direct current motor, driving motor output shaft one end be equipped with the fixed bolster, driving motor pass through the fixed bolster fixed with the motor install bin, the fixed bolster middle part be equipped with the recess that can hold the throttle and act as go-between the drive wheel, position sensing circuit board fix at the fixed bolster terminal surface, fixed bolster one side be equipped with throttle flexible axle complex shaft hole. The fixed bolster of this scheme is fixed with the driving motor output, then fix to the motor install bin in, throttle stay drive wheel is fixed with driving motor output shaft axle head, go back fixed position sensing circuit board on the fixed bolster, position sensing circuit board is located the throttle stay drive wheel outside, throttle stay drive wheel is located the recess of fixed bolster, position sensing circuit board fixed position is equivalent to sealing throttle stay drive wheel relatively in the recess, and the throttle flexible axle passes the shaft hole of fixed bolster, the throttle stay passes in the throttle flexible axle.

As the utility model discloses preferred scheme, fixed bolster recess top be equipped with and dismantle the briquetting, the recess shape, can dismantle briquetting bottom shape and throttle and act as go-between drive wheel appearance cooperation, just the recess, can dismantle briquetting bottom and throttle and act as go-between the drive wheel clearance and be less than 1 millimeter.

As the utility model discloses preferred scheme, the throttle act as go-between be equipped with the stopper, throttle act as go-between drive wheel periphery on be equipped with the trombone slide that can hold the throttle act as go-between, the throttle act as go-between drive wheel terminal surface on be equipped with and to tolerate spacing piece male jack, jack and trombone slide between be equipped with the intercommunication groove, position sensing circuit board upper portion be equipped with the U-shaped open slot. The throttle cable is arranged in the cable-pulling groove through the communicating groove; the U-shaped open slot on the position sensing circuit board is matched with the jack in position, so that the throttle pull wire limiting block is convenient to take and place.

As the preferred scheme of the utility model, position sensing circuit board on the hall angle sensor be Triaxis triaxial hall angle sensor, magnet steel and position sensing circuit board between the interval distance be 0.5-2 millimeters.

In order to accurately control the size of an accelerator of an engine, the current telescopic stroke of an accelerator pull wire needs to be reliably acquired in real time, the scheme measures the rotating angle of an accelerator pull wire driving wheel by using a Hall angle sensor, and the Triaxis three-axis Hall angle sensor can sense the magnetic field intensity in the vertical direction and the magnetic field intensity parallel to the surface of a chip; the magnetic field of the radial magnetized magnetic steel arranged at the center of the accelerator stay wire driving wheel rotates above the surface of the sensor chip arranged at the center of the position sensing circuit board, the strength of the magnetic field can be measured in a non-contact mode, as shown in fig. 2, the information of the angle can be obtained By calculating two vector components (such as Bx and By) of the magnetic field, and an analog quantity output voltage which is in direct proportion to the angle is generated; the relationship between the product stroke and the sensor output of the scheme example is shown in FIG. 3; the structure of the scheme is adopted to measure the accelerator stroke, only one magnetic steel needs to be added in the longitudinal direction, the gap between the magnetic steel and the position sensing circuit board is larger than 0.5mm and smaller than 2mm, the thickness of the position sensing circuit board is 2mm, the total distance is smaller than 4mm, the longitudinal distance of the common potentiometer is far smaller than, and due to the fact that the scheme adopts a non-contact mode, the measuring reliability is greatly increased.

As the utility model discloses preferred scheme, the throttle act as go-between include the steel wire, the steel wire outside be equipped with the nylon coating.

When an accelerator pull wire of the driving device is installed on an actual engine, due to the limitation of an installation space, the accelerator pull wire and an accelerator flexible shaft need to be bent, the accelerator pull wire is arranged at an outlet of the accelerator flexible shaft, or the accelerator support and the accelerator pull rod of the engine are not arranged on a straight line, so that the accelerator pull wire is contacted with the accelerator flexible shaft at the outlet, as shown in figure 4, and due to the relative motion between the accelerator pull wire and the accelerator flexible shaft, the accelerator pull wire is easy to break, in order to prolong the service life of the accelerator pull wire, a plastic-coated steel wire rope is adopted, the accelerator pull wire is composed of steel wires and nylon, as shown in figure 5, the wear resistance and the corrosion resistance of the accelerator pull wire are greatly improved.

The accelerator pull wire is a quick-wear part, and needs to be replaced conveniently when damaged; the installation structure of the accelerator pull wire is shown in figure 6, the accelerator pull wire driving wheel is rotated by driving the planetary reduction direct current motor, the pull wire fixing hole on the accelerator pull wire driving wheel is rotated to the top, the pull wire part in the accelerator pull wire is firstly extended into the accelerator flexible shaft, finally the fixing terminal at the tail end of the accelerator pull wire is placed into the pull wire fixing hole of the accelerator pull wire driving wheel, and finally the wire groove pressing block is covered; after the wire casing pressing block is covered, the gap between the accelerator pull wire driving wheel and the motor mounting bracket and the wire casing pressing block assembly is smaller than 1mm, and the diameter of the accelerator pull wire is larger than 1.5mm, so that the accelerator pull wire can be safely rolled in the wire casing in the accelerator pull wire driving wheel without worrying about separating from the wire casing in the accelerator pull wire driving wheel.

As the utility model discloses preferred scheme, the motor install bin include upper cover, shell and upper cover paste and be equipped with the encapsulating seal groove on the tight terminal surface, shell and throttle flexible axle, the waterproof joint contact department of being qualified for the next round of competitions be equipped with installation boss, encapsulating sealing washer, upper cover paste tight terminal surface with the shell on be equipped with encapsulating seal groove complex encapsulating groove layering.

As the preferred proposal of the utility model, the upper cover and the shell are made of aluminum alloy.

The throttle driving device has a very harsh use environment, and can be always drenched in water when raining at high temperature and high dust near an engine bin, so that the protection of the driving device is very important; in order to achieve certain impact resistance, the upper cover and the shell are both die-cast by adopting aluminum alloy, in order to enable the body part of the driver to achieve the waterproof grade of IP67, a glue filling groove sealed with the upper cover, a boss and a glue filling sealing ring matched with a mounting hole of an accelerator flexible shaft, a mounting hole boss and a glue filling sealing ring matched with a waterproof joint of an outgoing line are designed in the shell, and a glue filling groove pressing strip is designed in the upper cover; by the above measures, the waterproof grade of IP67 is achieved, and the waterproof grade passes the inspection of the related inspection mechanism.

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

the utility model has the advantages that the structure is simple, the occupied space is small, the accelerator cable is protected in place by the accelerator flexible shaft and the nylon protective layer, the wear resistance of the accelerator cable is improved, the service life of the accelerator cable is long, the whole device adopts a reliable sealing structure, the waterproof grade is high, the new accelerator cable is more reasonable in structure, easy to replace and convenient to maintain; the Hall angle sensor adopts a non-contact mode for measurement, so that the measurement reliability is greatly improved.

Drawings

Fig. 1 is an exploded view of a structure of the present invention;

fig. 2 is a schematic view of the rotation angle measurement structure of the present invention;

FIG. 3 is a schematic diagram of the relationship between the product stroke and the sensor output according to the present invention;

FIG. 4 is a schematic view of the friction structure of the throttle cable of the present invention;

FIG. 5 is a schematic view of the throttle cable covering structure of the present invention;

FIG. 6 is a schematic view of the throttle cable mounting structure of the present invention;

fig. 7 is a schematic view of a sealing structure of the housing of the present invention;

fig. 8 is a schematic view of the sealing structure of the upper cover of the present invention.

In the figure: 1. throttle cable 2, driving motor 3, throttle cable driving wheel

4. Position sensing circuit board 5, magnet steel 6, throttle flexible axle

7. Outgoing line waterproof connector 8, Hall angle sensor 9 and fixing support

10. Recess 11, shaft hole 12, can dismantle briquetting 13, stopper

14. Wire drawing groove 15, jack 16, steel wire 17 and nylon coating layer

18. Upper cover 19, shell 20, glue pouring seal groove 21 and mounting boss

22. A glue-pouring sealing ring 23 and a glue-pouring groove pressing strip.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the scope of the present invention based on the embodiments of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-8, the present invention provides a technical solution:

a non-contact position feedback engine throttle driving device comprises a throttle cable 1, a driving motor 2, a motor installation box and a throttle cable driving wheel 3, the position sensing circuit board 4, the magnet steel 5, the accelerator flexible shaft 6, the driving motor 2 is arranged in the motor installation box, the middle part of the accelerator flexible shaft 6 is provided with a through hole, the accelerator flexible shaft 6 passes through and is fixedly arranged on one side of the motor installation box, the motor installation box is also provided with an outgoing line waterproof joint 7, the accelerator pull wire driving wheel 3 is fixed with one end of an output shaft of the driving motor 2, the magnet steel 5 is arranged in the middle part of the accelerator pull wire driving wheel 3, the position sensing circuit board 4 is arranged on the outer side of the accelerator pull wire driving wheel 3 and is provided with a gap with the magnet steel 5, the position sensing circuit board 4 is provided with a Hall angle sensor 8 matched with the magnet steel 5 in position, one end of the accelerator pull wire 1 is detachably fixed with the accelerator pull wire driving wheel 3, and the other end of the accelerator pull wire 1 passes through the through hole of the accelerator flexible shaft 6 and is arranged outside the motor installation box;

the driving motor 2 is a planetary speed reduction direct current motor, one end of an output shaft of the driving motor 2 is provided with a fixed support 9, the driving motor 2 is fixed with a motor installation box through the fixed support 9, the middle part of the fixed support 9 is provided with a groove 10 capable of accommodating the accelerator stay wire driving wheel 3, the position sensing circuit board 4 is fixed on the end surface of the fixed support 9, and one side of the fixed support 9 is provided with a shaft hole 11 matched with the accelerator flexible shaft 6;

the top of a groove 10 of the fixed support 9 is provided with a detachable pressing block 12, the shape of the groove 10 and the shape of the bottom of the detachable pressing block 12 are matched with the appearance of the accelerator pull wire driving wheel 3, and the clearance between the bottom of the groove 10 and the detachable pressing block 12 and the accelerator pull wire driving wheel 3 is less than 1 mm;

the accelerator pull wire 1 is provided with a limiting block 13, a pull wire groove 14 capable of accommodating the accelerator pull wire 1 is arranged on the circumferential surface of the accelerator pull wire driving wheel 3, an insertion hole 15 capable of allowing the limiting block 13 to be inserted is arranged on the end surface of the accelerator pull wire driving wheel 3, a communicating groove is arranged between the insertion hole 15 and the pull wire groove 14, and a U-shaped open slot is arranged at the upper part of the position sensing circuit board 4;

the Hall angle sensor 8 on the position sensing circuit board 4 is a Triaxis three-axis Hall angle sensor, and the spacing distance between the magnetic steel 5 and the position sensing circuit board 4 is 0.5-2 mm;

the accelerator pull wire 1 comprises a steel wire 16, and a nylon coating layer 17 is arranged on the outer side of the steel wire 16;

the motor installation box comprises an upper cover 18 and a shell 19, wherein a glue pouring sealing groove 20 is formed in the close end face of the shell 19 and the upper cover 18, an installation boss 21 and a glue pouring sealing ring 22 are arranged at the contact part of the shell 19, an accelerator flexible shaft 6 and an outgoing line waterproof joint 7, and a glue pouring groove pressing strip 23 matched with the glue pouring sealing groove 20 is arranged on the close end face of the upper cover 18 and the shell 19;

the upper cover 18 and the shell 19 are made of aluminum alloy.

The working principle is as follows: the accelerator pull wire driving wheel 3 is driven to rotate through the driving motor 2 (a planetary speed reduction direct current motor), the accelerator pull wire driving wheel 3 drives the magnetic steel 5 to rotate synchronously, meanwhile, the accelerator pull wire driving wheel 3 drives the accelerator pull wire 1 to move in an accelerator flexible shaft 6 in a stretching mode, finally, the accelerator of the engine is driven by the accelerator pull wire 1 to change in size, the engine is controlled in rotating speed, and the specific stretching distance of the accelerator pull wire 1 is obtained through the relative rotating angle between the magnetic steel 5 installed on the accelerator pull wire driving wheel 3 and a Hall angle sensor 8(Triaxis three-axis Hall angle sensor) installed on the position sensing circuit board 4.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a contactless position feedback engine throttle drive arrangement, includes throttle and acts as go-between, driving motor, its characterized in that: still include motor install bin, throttle stay wire drive wheel, position sensing circuit board, magnet steel, throttle flexible axle, driving motor locate in the motor install bin, throttle flexible axle middle part be equipped with the through-hole and pass and set firmly in motor install bin one side, the motor install bin still be equipped with the waterproof connection of being qualified for the next round of competitions, throttle stay wire drive wheel and driving motor output shaft one end fixed, the magnet steel locate throttle stay wire drive wheel middle part, position sensing circuit board locate throttle stay wire drive wheel outside and with the magnet steel between be equipped with the interval, position sensing circuit board on be equipped with the hall angle sensor with magnet steel position complex, throttle stay wire one end can dismantle fixedly with throttle stay wire drive wheel, the throttle stay wire other end pass the through-hole of throttle flexible axle and locate outside the motor install bin.

2. The contactless position feedback engine throttle drive of claim 1, characterized in that: the driving motor is a planetary speed reduction direct current motor, one end of an output shaft of the driving motor is provided with a fixed support, the driving motor is fixed with a motor installation box through the fixed support, the middle part of the fixed support is provided with a groove capable of accommodating an accelerator pull wire driving wheel, a position sensing circuit board is fixed on the end face of the fixed support, and one side of the fixed support is provided with a shaft hole matched with an accelerator flexible shaft.

3. The contactless position feedback engine throttle drive of claim 2, characterized in that: the top of the fixed support groove is provided with a detachable pressing block, the shape of the groove and the shape of the bottom of the detachable pressing block are matched with the shape of the accelerator stay wire driving wheel, and the gap between the bottom of the groove and the accelerator stay wire driving wheel is less than 1 mm.

4. The contactless position feedback engine throttle drive of claim 1, characterized in that: the throttle cable is provided with a limiting block, a cable-pulling groove capable of accommodating the throttle cable is formed in the circumferential surface of the throttle cable driving wheel, an insertion hole capable of being inserted into the limiting block is formed in the end surface of the throttle cable driving wheel, a communicating groove is formed between the insertion hole and the cable-pulling groove, and a U-shaped open groove is formed in the upper portion of the position sensing circuit board.

5. The contactless position feedback engine throttle drive of claim 1, characterized in that: the Hall angle sensor on the position sensing circuit board is a Triaxis triaxial Hall angle sensor, and the spacing distance between the magnetic steel and the position sensing circuit board is 0.5-2 mm.

6. The contactless position feedback engine throttle drive of claim 1, characterized in that: the throttle is acted as go-between include the steel wire, the steel wire outside be equipped with the nylon coating.

7. The contactless position feedback engine throttle drive of claim 1, characterized in that: the motor installation box comprises an upper cover and a shell, wherein the shell and the upper cover are tightly attached to the end face and provided with a glue pouring seal groove, the contact position of the shell, an accelerator flexible shaft and a wire outlet waterproof joint is provided with an installation boss and a glue pouring seal ring, and the upper cover and the shell are tightly attached to the end face and provided with a glue pouring groove pressing strip matched with the glue pouring seal groove.

8. The contactless position feedback engine throttle drive of claim 7, wherein: the upper cover and the shell are made of aluminum alloy.