KR20100064207A - Actuator assembly of suspension of vehicle - Google Patents

Actuator assembly of suspension of vehicle Download PDF

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Publication number
KR20100064207A
KR20100064207A KR1020080122688A KR20080122688A KR20100064207A KR 20100064207 A KR20100064207 A KR 20100064207A KR 1020080122688 A KR1020080122688 A KR 1020080122688A KR 20080122688 A KR20080122688 A KR 20080122688A KR 20100064207 A KR20100064207 A KR 20100064207A
Authority
KR
South Korea
Prior art keywords
slider
housing
lead screw
actuator assembly
motor
Prior art date
Application number
KR1020080122688A
Other languages
Korean (ko)
Inventor
김영광
남광수
차우진
Original Assignee
현대모비스 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 현대모비스 주식회사 filed Critical 현대모비스 주식회사
Priority to KR1020080122688A priority Critical patent/KR20100064207A/en
Publication of KR20100064207A publication Critical patent/KR20100064207A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
    • B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
    • B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
    • B60G17/0157—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit non-fluid unit, e.g. electric motor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/40—Type of actuator
    • B60G2202/43—Mechanical actuator
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/418—Bearings, e.g. ball or roller bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/419—Gears
    • B60G2204/4193—Gears worm gears
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/012—Hollow or tubular elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/80—Manufacturing procedures
    • B60G2206/82—Joining
    • B60G2206/8207—Joining by screwing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H1/00—Toothed gearings for conveying rotary motion
    • F16H1/02—Toothed gearings for conveying rotary motion without gears having orbital motion
    • F16H1/04—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members
    • F16H1/12—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes
    • F16H1/16—Toothed gearings for conveying rotary motion without gears having orbital motion involving only two intermeshing members with non-parallel axes comprising worm and worm-wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
    • F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
    • F16H25/20—Screw mechanisms

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Body Suspensions (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

PURPOSE: An actuator assembly of a suspension for a vehicle is provided to appropriately block or absorb impact applied from a wheel, and to improve efficiency by simplifying a power transfer passage. CONSTITUTION: An actuator assembly of a suspension for a vehicle comprises a motor(1), a housing, a worm shaft(5), a worm wheel(7), a lead screw(9), and a screw nut(11). The housing is formed in order to receive power from the motor. The worm shaft is installed within the housing and is rotated using the power from the motor. The worm wheel is geared with the worm shaft. The lead screw is connected to the worm wheel. The screw nut is coupled to the lead screw to be linearly slid.

Description

Actuator Assembly of Suspension of Vehicle

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator assembly of a suspension device, and more particularly, to a structure of an actuator assembly that allows a wheel toe angle to be changed according to a driving situation of a vehicle.

The AGCS (Active Geometry Control System) receives the vehicle's vehicle speed and steering angle information, estimates the vehicle's lateral acceleration, and controls the actuator's stroke to change the suspension geometry related to the wheel's toe angle based on the ECU. It is a system to improve the turning stability when turning.

The driving unit of the conventional AGCS is a structure in which an actuator, a control lever, and an assist arm, each consisting of a motor and a reducer, are separately assembled and assembled. Such a configuration requires hardware such as unnecessary bearings for connecting each component, and has a large volume. In addition, it is difficult to mount the vehicle to the vehicle, and the disadvantage is that the efficiency is lowered and the cost increases.

The present invention has been made to solve the problems described above, to simplify the power transmission path from the motor generating the power to the wheel to increase the efficiency, reduce the volume to facilitate mounting on the vehicle, It is an object of the present invention to provide an actuator assembly of a suspension device to improve the assemblability and to reduce the cost, and to properly block or cushion the shock input from the wheel side.

Actuator assembly of the present invention suspended in order to achieve the object as described above

A motor;

A housing formed to receive power of the motor;

A worm shaft rotatably installed in the housing with power from the motor;

A worm wheel engaged with the worm shaft;

A lead screw connected to the worm wheel and constrained to each other in a rotational direction;

A screw nut screwed to the lead screw and installed to linearly slide;

A slider coupled to the screw nut to restrain each other in a linear sliding direction of the screw nut;

An assist arm having one end connected to the slider via a spherical bearing;

And a control unit.

The lead screw is installed long in the vertical direction of the vehicle body, the slider is formed is formed in a long rod shape in the front and rear direction of the vehicle body;

The upper and lower ends of the lead screw may have a structure in which an elastic member for elastically supporting the upper and lower ends of the lead screw with respect to the inner surface of the housing is provided.

Intermediate blocks each having an outer diameter greater than that of the lead screw are coupled to the upper and lower ends of the lead screw;

The elastic member is made of a hollow plate-shaped plate formed to apply an elastic force between the intermediate block and the housing;

Some sections of the hollow dish-shaped plate may be cut to form a slit.

The screw nut is provided with at least two vertical walls formed with a slider insertion groove to support the rod-shaped slider on both sides;

The slider insertion groove is formed in a shape that is constrained with the slider in the vertical sliding direction of the screw nut and open in a direction in which the assist arm extends to allow the slider to flow in the transverse direction of the vehicle body. ;

Two sides of the slider are provided with guide pipes fixed to the housing in parallel with the screw nuts to guide the vertical sliding movement of the slider;

The slider may be inserted into a slider insertion groove of the screw nut, but may have a structure inserted in a state in which a predetermined distance from the slider is secured in the horizontal direction.

The assist arm may be configured to have a spherical bearing connected to the slider between the vertical surfaces of the screw nut.

The motor may be integrally coupled to the housing, and the worm shaft may have a structure concentric with a rotation axis of the motor.

The motor may have a structure connected to transmit rotational force to a worm shaft of the housing through a cable.

The present invention simplifies the power transmission path from the motor generating the power to the wheel to increase efficiency, reduce the volume to facilitate mounting on the vehicle, improve assembly and reduce cost, the wheel side The shock from the input can be properly blocked or buffered.

1 to 6, an embodiment of the present invention includes a motor 1; A housing 3 formed to receive power of the motor 1; A worm shaft (5) rotatably installed in the housing (3) with power from the motor (1); A worm wheel 7 engaged with the worm shaft 5; A lead screw 9 connected to the worm wheel 7 and constrained to each other in a rotational direction; A screw nut 11 screwed to the lead screw 9 and installed to linearly slide; A slider (13) coupled to the screw nut (11) to restrain each other in a linear sliding direction of the screw nut (11); The slider 13 includes an assist arm 17 connected to one end via a spherical bearing 15.

In this embodiment, the worm wheel 7 and the lead screw 9 are splined.

Of course, the other end of the assist arm 17 is connected to the wheel so that the movement of the assist arm 17 is transmitted to the wheel so that the toe angle is adjusted.

The lead screw 9 is installed long in the vertical direction of the vehicle body, the slider 13 is formed in a long rod shape in the front and rear direction of the vehicle body, and the upper and lower ends of the lead screw 9 in the housing ( The inner side of 3) is provided with an elastic member 19 for elastically supporting the upper end and the lower end of the lead screw (9), respectively.

3, the intermediate block 21 having an outer diameter larger than the outer diameter of the lead screw 9 is coupled to the upper and lower ends of the lead screw 9, the elastic member 19 is the intermediate block ( 21) and a hollow plate-shaped plate formed to apply an elastic force between the housing 3, and a portion of the hollow plate-shaped plate is cut to form a slit 23 is formed.

Therefore, as shown in FIG. 4, when the impact force is transmitted from the wheel side through the assist arm 17, the lead screw 9 moves up and down with respect to the vertical force of the impact force to the hollow dish plate. The shock is absorbed and absorbed by the elastic member 19 made.

Here, the spring constant of the elastic member 19 is set to a value large enough so that a loss of stroke does not occur when changing the geometry according to the operation of the actuator assembly, so that the surface deformation can be made to the impact component as described above. What should I do?

Spring Force >> Maximum Actuation Force of Actuator Assembly

It is desirable to satisfy the following formula.

The screw nut 11 has at least two vertical walls 27 having a slider insertion groove 25 formed thereon so as to support the rod-shaped slider 13 at both sides, and the slider insertion groove 25 is provided. Is constrained with the slider 13 in the vertical sliding direction of the screw nut 11, and the assist arm 17 extends to allow the slider 13 to flow in the transverse direction of the vehicle body. It is formed in an open shape in the direction, the guide pipe which is fixed to the housing (3) in parallel to the screw nut 11 on both sides of the slider 13 to guide the linear sliding movement of the slider 13 in the vertical direction 29 is provided.

The slider 13 is inserted into the slider insertion groove 25 of the screw nut 11, as shown in Figure 5 is inserted in a state in which a constant distance from the slider 13 in the horizontal direction is inserted Take

By this configuration, the horizontal component of the impact force from the wheel side flowing through the assist arm 17 is blocked without being transmitted to the screw nut 11.

As a result, the vertical component of the impact force flowing from the wheel through the assist arm 17 is absorbed and absorbed by the elastic member 19 at both ends of the lead screw 9, and the horizontal component is the slider 13 and the screw nut. It is to be blocked by the gap between (11).

The assist arm 17 is connected to the slider 13 by a spherical bearing 15 between the vertical surfaces of the screw nut 11.

Thus, as illustrated in FIG. 6, the assist arm 17 may be twisted with respect to the slider 13 within a range allowed by the spherical bearing 15 in up, down, left, and right directions. In mounting the actuator assembly, the assembly deviation, processing error, etc. are absorbed, and the mounting assembly to the vehicle is facilitated.

Of course, in order to allow the movement of the assist arm 17 as described above, it is preferable that the housing 3 has a structure in which the assist arm 17 protrudes with a boot or the like that is easily deformable.

In this embodiment, the motor 1 is integrally coupled to the housing 3, and the worm shaft 5 has a structure concentric with the rotation axis of the motor (1).

Unlike the conventional structure, the control lever does not require the above-mentioned structure, and all components from the motor to the assist arm can be packaged integrally, and the internal structure thereof is simple to assemble and to minimize the volume. As a result, the mountability to the vehicle is improved, power can be transmitted more efficiently, and the shock from the wheel side can be properly blocked and absorbed, thereby improving the durability of the vehicle itself and improving the ride comfort of the vehicle. Can be.

Looking at the operation of the present invention configured as described above with reference to Figures 7 and 8 as follows.

When the ECU controls the motor 1 according to the vehicle speed and the steering angle of the vehicle, the rotational force of the motor 1 drives the worm shaft 5, and the worm wheel 7 engaged with the worm shaft 5 is When rotated, the lead screw 9 is rotated together to move the screw nut 11 up and down, the slider 13 coupled to the screw nut 11 is guided by the guide pipe 29 while the screw It moves up and down along the nut 11.

Accordingly, one end of the assist arm 17 connected to the slider 13 by one end of the spherical bearing 15 is moved up and down. As a result, the other end of the assist arm 17, that is, the connection point with the wheel, is connected to the vehicle body. The toe angle is adjusted by bringing about a change in geometry that is pulled in or away from the inside.

On the other hand, 9 and 10 shows another embodiment of the present invention, the motor 1 may take a structure connected to transmit the rotational force to the worm shaft 5 of the housing 3 through the cable 31 and As compared with the above embodiment, such a structure can increase the package freedom of the actuator assembly, and can also improve the freedom of mounting on the vehicle.

1 is a view showing an actuator assembly of a suspension device according to the present invention;

2 is an exploded perspective view of FIG. 1;

3 is a view showing in detail the elastic member installation state of the lead screw end;

4 is a view illustrating that the vertical component of the impact force through the assist arm is buffered and absorbed;

5 is a view illustrating a structure in which the horizontal component of the impact force through the assist arm is blocked;

6 is a view for explaining the degree of freedom of the assist arm by the spherical bearing,

7 and 8 illustrate the operation of the present invention,

9 and 10 illustrate another embodiment of the present invention.

<Brief description of symbols for the main parts of the drawings>

One; Motor 3; housing

5; Worm shaft 7; Worm wheel

9; Lead screw 11; Screw nut

13; Slider 15; Spherical Bearing

17; Assist arm 19; Elastic member

21; Interblock 23; Slit

25; Slider insertion groove 27; Vertical wall

29; Guide pipe 31; cable

Claims (7)

A motor; A housing formed to receive power of the motor; A worm shaft rotatably installed in the housing with power from the motor; A worm wheel engaged with the worm shaft; A lead screw connected to the worm wheel and constrained to each other in a rotational direction; A screw nut screwed to the lead screw and installed to linearly slide; A slider coupled to the screw nut to restrain each other in a linear sliding direction of the screw nut; An assist arm having one end connected to the slider via a spherical bearing; Actuator assembly, characterized in that configured to include a. The method according to claim 1, The lead screw is installed long in the vertical direction of the vehicle body, the slider is formed is formed in a long rod shape in the front and rear direction of the vehicle body; The upper and lower ends of the lead screw is provided with an elastic member for elastically supporting the upper and lower ends of the lead screw with respect to the inner surface of the housing Actuator assembly of the suspension device. The method according to claim 2, Intermediate blocks each having an outer diameter greater than that of the lead screw are coupled to the upper and lower ends of the lead screw; The elastic member is made of a hollow plate-shaped plate formed to apply an elastic force between the intermediate block and the housing; Some sections of the hollow dish-shaped plate is cut to form a slit Actuator assembly of the suspension device. The method according to claim 2, The screw nut is provided with at least two vertical walls formed with a slider insertion groove to support the rod-shaped slider on both sides; The slider insertion groove is formed in a shape that is constrained with the slider in the vertical sliding direction of the screw nut and open in a direction in which the assist arm extends to allow the slider to flow in the transverse direction of the vehicle body. ; Two sides of the slider are provided with guide pipes fixed to the housing in parallel with the screw nuts to guide the linear sliding motion of the slider in the vertical direction; The slider is inserted into the slider insertion groove of the screw nut, it is inserted in a state that secures a constant distance from the slider in the transverse direction Actuator assembly of the suspension device. The method according to claim 4, The assist arm is connected to the slider by spherical bearings between the vertical surfaces of the screw nut. Actuator assembly of the suspension device. The method according to any one of claims 1 to 5, The motor is integrally coupled to the housing, wherein the worm shaft is concentric with the rotation axis of the motor Actuator assembly of the suspension device. The method according to any one of claims 1 to 5, The motor is connected to transmit rotational force through a cable to the worm shaft of the housing Actuator assembly of the suspension device.
KR1020080122688A 2008-12-04 2008-12-04 Actuator assembly of suspension of vehicle KR20100064207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020080122688A KR20100064207A (en) 2008-12-04 2008-12-04 Actuator assembly of suspension of vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020080122688A KR20100064207A (en) 2008-12-04 2008-12-04 Actuator assembly of suspension of vehicle

Publications (1)

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KR20100064207A true KR20100064207A (en) 2010-06-14

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101283604B1 (en) * 2011-12-12 2013-07-05 현대자동차주식회사 Active geometry control suspension system
KR101294068B1 (en) * 2011-12-12 2013-08-07 기아자동차주식회사 Active geometry control suspension system
KR101446945B1 (en) * 2013-05-06 2014-10-06 주식회사 인팩 Actuator for active geometry control suspension system
KR20190065639A (en) * 2017-12-04 2019-06-12 주식회사 만도 Suspension system for use in vehicle
CN110513418A (en) * 2019-08-20 2019-11-29 武汉理工大学 A kind of displacement-adjustable power feeding shock absorber

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101283604B1 (en) * 2011-12-12 2013-07-05 현대자동차주식회사 Active geometry control suspension system
KR101294068B1 (en) * 2011-12-12 2013-08-07 기아자동차주식회사 Active geometry control suspension system
KR101446945B1 (en) * 2013-05-06 2014-10-06 주식회사 인팩 Actuator for active geometry control suspension system
KR20190065639A (en) * 2017-12-04 2019-06-12 주식회사 만도 Suspension system for use in vehicle
CN110513418A (en) * 2019-08-20 2019-11-29 武汉理工大学 A kind of displacement-adjustable power feeding shock absorber

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