KR101304193B1 - Clutch actuator - Google Patents

Abstract

PURPOSE: A clutch actuator is provided to reduce the operational loads of an operation unit for operating a fork acting unit. CONSTITUTION: A clutch actuator (100) comprises a housing (110), an operation unit (120), a slider (130), an operation lever (140), a fork acting unit (150), and an assist unit (160). The operation unit is installed on the housing to enable an operation shaft (121) to rotate inside the housing. The slider is equipped on the operation shaft to be reciprocated with the operation of the operation unit. The operation lever is rotatably joined to the housing using a hinge unit (143). Both ends of the operation lever rotate by being pressurized by the slider in the reciprocation of the slider. The fork acting unit linearly moves inside the housing with the rotation of the operation lever and operates the actuation fork. The assist unit adds loads for the reciprocation of the fork acting unit to the operation unit. The assist unit comprises an assist spring (162). The assist spring is fixed to the housing and is elastically supported.

Description

Clutch Actuator {CLUTCH ACTUATOR}

The present invention relates to a clutch actuator, and more particularly, to a clutch actuator that can simplify the structure of the clutch actuator to actuate an actuating fork that presses the clutch diaphragm spring during operation of the clutch, thereby improving assembly.

Generally, a vehicle is provided with a clutch between an engine and a transmission. The clutch is connected between an engine-side flywheel and a transmission input shaft so as to transmit or interrupt the rotational force of the engine to the transmission. When shifting gears of the transmission, it cuts off the power from the engine and connects the power of the engine to the propeller shaft while driving.

This conventional clutch 1 presses the clutch pedal 2 to depress the pedal reaction force of the pedal 2 via the clutch master cylinder 3 and the release fork 4 and the release bearing 5, And press or release the diaphragm spring to transmit or interrupt the power of the engine.

On the other hand, an automatic manual transmission and a double clutch transmission that use the clutch release action, which has been operated by stepping on the clutch pedal 2, as a clutch actuator have been proposed.

Among them, a clutch actuator for switching a rotational force of a motor to a linear reciprocation in a double clutch transmission to press a clutch diaphragm spring to perform a clutch action is disclosed in Korean Patent Laid-Open No. 10-2012-0011527.

Such a clutch actuator includes a driving unit for generating a rotational force, a vertical load applying unit for vertically reciprocating to generate a vertical load, a cam frame for linearly reciprocating motion by the driving unit and the vertical load applying unit, And a fork acting portion for actuating the fork.

In the conventional clutch actuator, when the driving unit is operated, the cam frame linearly moving by the driving unit is horizontally moved in one direction. At this time, the fork action unit horizontally moves together with the cam frame to act the actuation fork.

When the cam frame is horizontally moved in one direction, the vertical load acting portion is lifted in a state in which the cam frame is pressed downward by the elastic force, thereby releasing the pressurization of the cam frame. At this time, the vertical load acting portion is compressed, and the elastic force is accumulated.

Thereafter, when the operation of the actuator fork is released, that is, when the operation of the driving part is released, the cam frame comes into contact with the lower end of the vertical load applying part and the accumulated elastic force of the curved surface part of the cam frame and the vertical load applying part It returns horizontally to its original position. At this time, the rotation part of the driving part to which the cam frame is coupled is also rotated. Further, when the cam frame horizontally moves in the other direction and is returned, the fork action part is returned to the home position and the action of the actuation fork is released.

In the conventional clutch actuator as described above, when the cam frame is moved by the operation of the drive unit, the fork action unit moves together to act on the actuation fork. When the drive unit is driven, the cam frame also acts to compress the vertical action unit. Since the load load is further increased, a driving unit having a high capacity is required, and thus the unit cost of the component is increased.

Therefore, the present invention has been made in order to solve the above problems, in order to actuate the actuating fork of the clutch, the operating lever for linearly moving the fork action part after switching the rotational force of the drive into a linear motion and a rotational motion It is an object of the present invention to provide a clutch actuator that can reduce the driving load of the drive unit.

Further, by forming an assist portion which is rotated by a slider linearly moved by the rotational force of the drive portion and pressurizes the end portion of the operating lever for linearly moving the fork action portion, an elastic force of the assist portion can be added to the drive load of the drive portion when the clutch is operated. Another purpose is to provide a clutch actuator.

The present invention for achieving the above object, the drive unit is coupled to the housing, the drive shaft is provided, the slider coupled to the linear movement to the drive shaft, and hinged to the housing so that both ends are rotated by the linear movement of the slider An actuating lever coupled to one end of the engaging groove, and a fork operating portion for actuating an actuating fork of the clutch by linearly moving by the other end of the actuating lever when the actuating lever is rotated; And an assist spring coupled to the engaging groove and hinged to the housing to be elastically supported, wherein the assist spring includes a first coil providing elastic force and an extension of the first coil and protruding to one side of the first coil. A second coil which is formed to be coupled to the engaging groove, extends to the engaging portion, and provides an elastic force; And a hinge coupling part protruding to both sides of the first coil and the second coil, the hinge coupling part being hinged to an inner surface of the housing and formed to have a predetermined angle with the locking part.

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In addition, between the operating lever and the assist spring, it is preferable to further include a wear reducing member for reducing the friction by reducing the friction generated between the engaging groove portion and the assist spring during the operation of the clutch.

According to the present invention, in order to actuate the actuating fork of the clutch, the fork acting portion is linearly moved by the linear force of the slider and the rotational movement of the operating lever. By being configured to, it is possible to reduce the drive load of the drive unit applied to act on the fork action, there is an effect that the structure is simple to improve the assembly.

In addition, by forming an assist portion between the end of the operating lever rotated to move the fork action portion and the housing to add the elastic force of the assist spring of the assist portion to the driving load of the drive portion, there is an effect that can reduce the load of the drive portion.

1 is a view showing a clutch system in a conventional manual transmission;
Figure 2 is a cross-sectional view showing a clutch actuator according to an embodiment of the present invention.
Figure 3 is a perspective view and a front view showing the assist spring of the assist portion in the clutch actuator of Figure 2;
Figure 4a shows the characteristics of the drive load of the drive against the diaphragm spring and the stroke of the pressing clutch actuator of the diaphragm spring when operating in a conventional clutch.
Figure 4b is a view showing the characteristics of the drive load for the assist spring and the stroke of the clutch actuator during clutch operation in the clutch actuator of FIG.
Figure 4c is a view showing the characteristics of the drive of the drive and the stroke of the clutch actuator for pressing the diaphragm spring in the state that the assist spring is applied in the clutch actuator of FIG.
5 and 6 show an operating state for the clutch actuator of FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

Figure 2 is a cross-sectional view showing a clutch actuator according to an embodiment of the present invention, Figure 3 is a perspective view and a front view showing the assist spring of the assist portion in the clutch actuator of FIG. Figure 4a is a view showing the characteristics of the driving load on the drive unit for the diaphragm spring and the stroke of the clutch actuator for pressing the diaphragm spring when operating in a conventional clutch, Figure 4b is an assist spring in the clutch operation in the clutch actuator of Figure 2 Figure 4c shows the characteristics of the driving load and the stroke of the clutch actuator, Figure 4c shows the characteristics of the driving load of the drive and the stroke of the clutch actuator for pressing the diaphragm spring in the state that the assist spring is applied in the clutch actuator of FIG. Drawing.

As shown, the clutch actuator 100 according to an embodiment of the present invention is the housing 110, the drive unit 120, the slider 130, the operating lever 140, the fork action unit 150 And an assist unit 160.

First, the housing 110 constitutes an external shape of the clutch actuator 100, and an installation space is formed inside, such that a plurality of components are coupled to each other to operate.

One side of the housing 110 is provided with a motor that is a drive unit 120, the drive shaft 121 is directed toward the inside of the housing 110 so that the drive shaft 121 of the drive unit 120 is rotated inside the housing 110. Is installed.

In addition, the drive shaft 121 of the drive unit 120 is configured such that the slider 130 is reciprocated by the drive of the drive unit 120 to rotate the operation lever 140 to be described later.

The slider 130 is formed in a substantially triangular shape, one side (upper side) is coupled to the drive shaft 121 of the drive unit 120, it is configured to reciprocate in a straight line when the drive shaft 121 is rotated. The other side of the slider 130 (an oblique side) is configured to contact the operation lever 140 to be described later when the slider 130 is moved in a straight line and press the operation lever 140 downward. That is, when the slider 130 is reciprocated, the operation lever 140 to be described later is in contact with the other side of the slider 130 to be reciprocated.

Here, the drive shaft 121 and the slider 130 is preferably configured in the form of a ball screw. In addition, the drive shaft 121 may be configured in the form of a lead screw, and the slider 130 may be configured to be screwed to the drive shaft 121, so that the drive shaft 121 may be reciprocated when the drive shaft 121 is rotated.

The operation lever 140 is rotatably coupled to the housing 110 by the hinge portion 143, and is configured to rotate at both ends by pressing the slider 130 during reciprocating movement of the slider 130.

The operation lever 140 is bent to form a shape of "∧", if the bent portion 141, the one side 142 around the bent portion 142 is hinged to the housing 110 The hinge portion 143 is provided to be fixed. And, the other side portion 144 of the operation lever 140 is in contact with one end of the fork action portion 150 to be described later, press the upper end of the fork action portion 150 to straighten the fork action portion 150 Exercised.

The fork action part 150 is installed to reciprocate in the interior of the housing 110, one end of which protrudes out of the housing 110, by linear movement in the housing 110 by the rotation of the operating lever 140 Actuation fork (not shown) will act.

In addition, the fork operation part 150 has a contact part 151 contacting the lower side of the other side 144 of the operating lever 140 when the operating lever 140 is rotated about the hinge part 143 to reciprocate. It is provided. The contact portion 151 is to be reciprocated along the lower side of the other side 144 of the operating lever 140 when the operating lever 140 is rotated. In addition, the contact part 151 may rotate smoothly from the other side 144 of the operating lever 140 when the operating lever 140 rotates and presses the fork action part 150. It is composed of a rotating member that is rotatably fixed to the fork action portion 150.

In addition, the fork action part 150 further includes a rotating body 152 that rotates while being supported and moved to the bottom 111 of the housing 110 when the fork action part 150 moves linearly by the rotation of the operation lever 140. That is, when the fork action part 150 linearly moves by the rotation of the operation lever 140, the rotating body 152 is supported by the bottom 111 of the housing 110 and rotates as the fork action part 150 rotates. It is to smooth the linear movement.

In addition, an end portion 142 of the operation lever 140 is provided with an assist portion 160 that adds a load to the driving load of the driving portion 120 required for the reciprocating movement of the fork action portion 150 when the clutch is operated.

The assist portion 160 is coupled to the locking groove 161 and the locking groove 161 is formed at the end of one side portion 142 of the operation lever 140, the hinge is fixed to the housing 110, the support is elastically supported A spring 162.

The assist spring 162 is composed of a torsion spring, as shown in FIG. 3, the first coil 162a which is wound in a coil shape to provide elastic force, and extends from the first coil 162a and has a first coil in a ring shape. A protruding portion 162b protruding to one side of the 162a to be hooked to the engaging groove 161, a second coil 162c extending to the engaging portion 162b, wound in a coil form, and providing elastic force; Protruding to both sides of the first coil (162a) and the second coil (162c) is hinged fixed to both sides of the housing 110, a pair of hinge coupling portion formed with a predetermined angle with the locking portion (162b) ( 162d).

The assist spring 162 includes a first coil 162a, a locking portion 162b, a second coil 162c, and a hinge coupling portion 162d as a body, and a pair of hinge coupling portions 162d. Is orthogonal to the direction in which the first coil 162a and the second coil 162c are wound, protruded in opposite directions, and are fixed to both sides of the housing 110 by hinges, and the engaging portion 162b is operated. The structure is fixed to the locking groove 161 of the lever 140. Here, the hinge coupling portion 162d and the locking groove portion 161 of the assist spring 162 are formed at a predetermined angle, with a hinge coupling portion 162d hinged to an inner surface of the housing 110. When the locking groove 161 is rotated is configured to receive an elastic force.

That is, the assist spring 162 of the first coil 162a and the second coil 162c when the locking portion 162b is rotated around the hinge coupling portion 162d hinged to the inner surface of the housing 110. It is configured to receive an elastic force by winding.

In addition, the assist portion 160 is the locking groove 161 and the locking portion 162b when the clutch is operated after the locking portion 162b of the assist spring 162 is engaged by the locking groove 161 of the operation lever 140. A wear reducing member 163 is further provided to reduce abrasion between.

That is, the wear reduction member 163 is formed of a metal material of the operation lever 140 and the assist spring 162, the wear occurs between the locking groove 161 and the locking portion 162b to reduce the wear will be. The wear reduction member 163 is configured to be fitted and coupled from the lower side of the locking groove 161 and is formed of a plastic material to reduce wear of the locking groove 161 and the locking portion 162b.

Here, looking at the characteristics between the driving load of the clutch actuator 100 applied to the diaphragm spring of the conventional clutch and the stroke of the fork action portion 150 of the clutch actuator 100, as shown in Figure 4a, initially the clutch actuator 100 It can be seen that the driving load of the driving unit 120 gradually increases while the fork action part 150 of the) is gradually moved, and then the driving load increases rapidly when the movement of the fork action part 150 is completed.

On the other hand, when the clutch is operated at the initial installation position in the assist spring 162 of the assist portion 160 applied to the clutch actuator 100 according to the embodiment of the present invention, the stroke and assist spring of the clutch actuation fork. The characteristic according to the load acting on 162 is shown in Figure 4b. That is, since the fork action portion 150 of the clutch actuator 100 is initially compressed by the assist spring 162, the driving load of the drive portion 120 increases more slowly, and then the fork action portion 150 moves. At the point where the assist spring 162 is compressed at the maximum, the driving load of the drive unit 120 is applied to the maximum, and then, in the second half of the fork action unit 150, the original state of the assist spring 162 is compressed. Since the elastic force of the assist spring 162 is applied to the movement of the fork action part 150 while returning to, the driving load of the driving part 120 is reduced.

As the assist spring 162 is configured in the clutch actuator 100 as described above, as shown in FIG. 4C, the driving load of the driving unit 120 of the clutch actuator 100 increases in the initial stage of operation, and then assists the spring 162. After the maximum compression, i.e., when the driving load of the driving unit 120 applied to the diaphragm spring increases, the return force of the assist spring 162 is added to the driving load of the driving unit 120 acting on the diaphragm spring. To reduce the load on the drive unit 120 is configured.

The operation of the clutch actuator according to the embodiment of the present invention having the above configuration will be briefly described with reference to FIGS. 5 and 6.

First, when the clutch for shifting is operated while the vehicle is driving, the driving unit 120 is driven.

Then, the drive shaft 121 is rotated, and at this time, the slider 130 is moved a predetermined distance to the left as shown in FIG. 5 along the drive shaft 121. At the same time, the operation lever 140 in contact with the other side of the slider 130 is rotated at a predetermined angle around the hinge portion 143.

Then, the other side 144 of the operating lever 140 is rotated to press the contact portion 151 of the fork action portion 150. At this time, the fork action part 150 moves to a right distance as shown in FIG. 5. As such, when the fork action part 150 moves to the right, the rotating body 152 provided at the end of the fork action part 150 rotates and moves along the bottom 111 of the housing 110.

At this time, the assist spring 162 of the assist portion 160 provided at one end 142 of the operating lever 140 is in the maximum compression state by the rotation of the operating lever 140.

Thereafter, as shown in FIG. 6, when the movement of the slider 130 is completed according to the driving of the driving unit 120, the operating lever 140 is further rotated by the hinge part 143 to contact the contact portion of the fork operation unit 150 ( 151 is further pressed. Then, the other end portion 144 of the operation lever 140 is located in the groove portion 112 provided below the bottom 111 of the housing 110, the contact portion 151 of the fork action portion 150 As the fork action portion 150 is moved to the bent portion 141 of the operating lever 140 to move further to the right as shown in Figure 6 to actuate the actuation fork of the clutch. When the fork action part 150 actuates the actuation fork, the assist spring 162 of the assist part 160 coupled to the end of one side 142 of the operating lever 140 is in its original state in the maximum compression state. Return to.

At this time, the actuation fork of the clutch acts as a clutch to press the diaphragm spring of the clutch to the actuation bearing.

Thereafter, when the operation of the clutch is released, the clutch actuation fork moves to its original position by the reaction force of the diaphragm spring of the clutch, and at this time, the fork action part 150 moves to the left in the state shown in FIG. 6. Then, the operating lever 140 in close contact with the contact portion 151 of the fork action portion 150 is rotated clockwise in FIG. 6 around the hinge portion 143.

At this time, the assist spring 162 provided at the end of one side 142 of the operation lever 140 is compressed to the maximum again and returned to the original state before the clutch actuator 100 is operated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is understandable. Accordingly, the true scope of the present invention should be determined by the following claims.

100: clutch actuator
110 housing 111 bottom surface
112: Groove
120: drive part 121; driving axle
130: slider
140: operation lever 141: bent portion
142: one side 143: hinge
144: other side
150: fork action portion 151: contact portion
152: rotating body
160: assist portion 161: locking groove portion
162: assist spring 163: wear protection member

Claims (3)

A driving unit coupled to the housing and having a driving shaft;
A slider coupled to the drive shaft so as to move linearly;
An actuating lever hinged to the housing such that both ends are rotated by a linear movement of the slider, and an engaging lever bent at one end thereof;
A fork action portion for actuating the actuation fork of the clutch by linearly moving by the other end of the actuating lever when the actuating lever is rotated,
And an assist spring coupled to the locking groove and fixedly supported by a hinge to the housing.
The assist spring,
A first coil providing an elastic force,
A locking portion extending from the first coil and protruding to one side of the first coil to be coupled to the locking groove;
A second coil extending to the locking portion and providing an elastic force;
A hinge coupling part protruding from both sides of the first coil and the second coil, the hinge coupling part being hinged to an inner surface of the housing and formed to have a predetermined angle with the locking part;
Clutch actuator comprising a. delete The method of claim 1,
Between the operating lever and the assist spring,
The clutch actuator further comprises a wear reduction member for reducing abrasion by reducing friction generated between the engaging groove and the assist spring when the clutch is operated.

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