KR101157344B1 - Clutch master cylinder comprising magnet which is supported by magnet seat - Google Patents

Abstract

The present invention relates to a clutch master cylinder, and more particularly, to a clutch master cylinder in which an annular magnet is coupled to an outer diameter of a piston, and a magnet supported by a magnet seat is supported by a magnet seat.
The present invention, the piston is inserted into the cylinder in the longitudinal direction is installed to be installed, the push rod is connected to the piston to transfer the force, and the clutch master cylinder is provided with a sensor on the outside of the cylinder to detect the position of the piston In an embodiment, an annular magnet coupled to an outer diameter of the piston may include a magnet sheet fixedly supporting the magnet at one side of the magnet.

Description

Clutch master cylinder where magnet is supported by magnet seat {CLUTCH MASTER CYLINDER COMPRISING MAGNET WHICH IS SUPPORTED BY MAGNET SEAT}

The present invention relates to a clutch master cylinder, and more particularly, to a clutch master cylinder in which an annular magnet is coupled to an outer diameter of a piston, and a magnet supported by a magnet seat is supported by a magnet seat.

In general, a clutch master cylinder of an automobile transmits a load to a push rod of a clutch master cylinder by operation of a clutch pedal. This generates hydraulic pressure in the clutch master cylinder, which is sequentially transmitted from the clutch release cylinder to the release fork and release bearing to manipulate the clutch. The clutch operated in this way transmits the engine's rotational force to the transmission, enables smooth and vibration-free oscillation, temporarily shuts off power flow between the engine and the transmission as needed, and protects the engine and power train from overload. It also plays many roles such as reducing engine and rotational vibrations.

1 is a view showing a clutch master cylinder according to the prior art.

Looking at the conventional clutch master cylinder (10), provided with a cylinder (11) having a hollow cylindrical shape, the piston 12 is inserted to be movable in the longitudinal direction of the cylinder (11). In addition, one end of the push rod 14 is fixed to one side of the piston 12 via the insert piston ring 16 and the insert piston 13, and the other end of the push rod 14 is moved out of the cylinder 11. A yoke 15 is provided which protrudes and is connected to a clutch pedal (not shown). The yoke 15 may here be fastened to the push rod by means of an insert 17 and a nut 18. The yoke 15 is fitted with a clutch pedal and is fastened with clevis pins (not shown), and the clutch pedal is pivotally fastened around the hinge shaft and supported by the vehicle body. In addition, a release flow path is formed in one portion of the cylinder 11 to discharge oil pressurized by the piston 12, and one side wall of the cylinder has a clutch oil supply passage 19 connected to a reservoir tank (not shown). Is formed.

On the other hand, according to the development of the electronic parking brake system (Electronic Parking Brake System), the clutch master cylinder has to transmit the position value of the piston to the ECU (Electronic Control Unit) through the position sensor (Travel Sensor). Because of the operation of the clutch pedal, the auto cruise function, the parking brake function, and the parking brake inter lock function can be implemented depending on the position of the piston in the clutch master cylinder. Because. Therefore, there is a need to know the exact position value of the piston in the cylinder.

The present invention relates to a clutch master cylinder, and more particularly, to a clutch master cylinder to which a magnet is coupled to an outer diameter of a piston, and a magnet seat to which a magnet is fixed by a magnet seat is coupled.

The present invention, the piston is inserted into the cylinder in the longitudinal direction is installed, the push rod is connected to the piston to transmit the force, and the magnet provided with a sensor on the outside of the cylinder to detect the position of the magnet magnet seat In the clutch master cylinder coupled by the, characterized in that it comprises an annular magnet coupled to the outer diameter of the piston, a magnet seat for holding and supporting the magnet on one side of the magnet.

In addition, the present invention is characterized in that it comprises a protrusion formed on one end of the piston, a magnet fitted into the protrusion by the method of forced indentation, a magnet sheet fitted to support the magnet on one side of the magnet.

In addition, the present invention is characterized in that the protrusion is composed of a seating portion to which the magnet is fitted, a fixing groove in which the magnet sheet is positioned to support the magnet, and a locking jaw portion to prevent the magnet sheet from being removed.

In addition, the present invention is characterized in that the magnet sheet has a snap ring shape and a protrusion is formed on a surface facing the magnet, and the magnet is formed with a groove corresponding thereto, so that the protrusion and the groove are engaged with each other.

By the configuration as described above, the present invention can minimize the clearance of the magnet and the magnet sheet used to detect the position of the piston to prevent the minute movement of the magnet to increase the accuracy (accuracy) of the position sensor.

In addition, one end of the piston is formed in the shape of a protrusion, there is an advantage that the magnet magnet to support and fix the ring-shaped magnet and it is coupled to the protrusion to facilitate the coupling of the magnet.

In addition, by combining the magnet to the piston in a simple manner by the magnet sheet can reduce the time required for the production of the product, it is possible to reduce the production cost.

1 is a view showing a clutch master cylinder according to the prior art.
2 is a cross-sectional view showing a clutch master cylinder according to the present invention.
Figure 3a is a view showing an embodiment in which the magnet is supported in the piston by the magnet sheet according to the present invention.
3b is a view showing in detail the magnet according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view of the clutch master cylinder according to the present invention.

First, the piston 110, piston 120, which forms the exterior of the clutch master cylinder 100 and has a hollow cylindrical shape, moves in the longitudinal direction from the inside of the cylinder 110, and applies hydraulic pressure to the clutch oil. And an insert piston 130 connecting the push rod 140 and the push rod 140 to the yoke 150 connected to the clutch pedal (not shown) and the reservoir tank and the clutch master cylinder 100 in which the clutch oil is stored. It consists of an oil supply passage 190 and the like. In particular, one side of the piston 120 is a magnet 160 that is a permanent magnet and a magnet seat 170 for supporting and fixing the magnet 160 is located, located on the outside of the cylinder 110 and mutually with the magnet 160 By action, it includes a position sensor 180 for detecting the movement of the piston (120).

The cylinder 110 has a hollow cylindrical shape so that the piston 120 can move in the longitudinal direction, and an oil supply hole is connected to an oil supply path so that the oil of the reservoir tank can be supplied to the upper portion thereof. Inside the cylinder 110 is located a piston 120 that can move in the longitudinal direction to apply pressure to the oil. One end of the piston 120 is fitted with a magnet 160 to detect the movement of the piston 120 by interaction with the position sensor 180 located outside the cylinder 110, the magnet 160 To fix the magnet sheet 170 is supported on one side of the magnet 160. Specifically, the piston 120 has a cylindrical shape, and at one end, a protrusion 121 into which the magnet 160 and the magnet sheet 170 are inserted is formed, and at the other end, the fastening groove 125 to which the insert piston 130 is coupled is provided. Is formed. Here, the protrusion 121 is locked so that the fixing part 123 and the magnet sheet 170 to which the magnet part 160 is seated and the magnet sheet 170 are fitted to fix the magnet 160 are pulled out. The locking step 124 is configured in the longitudinal direction in order. The magnet 160 may be positioned at one end of the piston 120 in an annular ring shape so as not to interfere with the movement of the piston 120. The magnet 160 may be fitted to the protrusion 121 formed at one end of the piston 120 to seat the magnet. It is inserted into 122. The magnet sheet 170 may also be formed in an annular ring shape to be inserted into the fixing groove 123 to support the magnet 160. However, the snap ring shape is preferably inserted into the fixing groove 123 having an outer diameter smaller than the outer diameter of the locking jaw portion 124 and the seating portion 122 to support and fix the magnet 160. By having a snap ring shape and elasticity, it has an outer diameter larger than the inner diameter of the magnet sheet 170, and is easily fastened to the fixing groove 123 through the locking jaw portion 124 having one end tapered.

On the other hand, the outer side of the cylinder 110 corresponds to the magnet 160 coupled to the piston 120, the position sensor 180 for detecting the movement of the mark 160 is coupled. Position sensor 180 is preferably coupled to one side of the cylinder 110 corresponding to the movement section region (M) of the piston 120, so that the stroke and position of the piston 120 can be measured. This is because the magnet 160 coupled to the piston 120 is also located at one end of the piston 120, it is possible to more easily recognize the movement of the magnet 160. Therefore, when the magnet 160 coupled to one end of the piston 120 is a linear reciprocating motion with the piston 120, the position sensor 180 detects the magnetic force of the magnet 160 in the movement section (M) The position of the piston 120 is calculated.

The other end of the piston 120 is coupled to the insert piston 130 for connecting to the push rod 140. Insert piston 130 has an insertion portion 135 is formed to be coupled to the piston 120 in the manner of forced press-fit, the insertion portion 135 may be formed with a tooth-shaped projection having a certain direction. The other end of the piston 120, the fastening groove 125 is positioned so that the insertion portion 135 of the insert piston 130 can be forcibly pressed. In addition, of course, the piston 120 and the insert piston 130 may be coupled by a screw fastening method as well as a forced pressing method.

In addition, one end of the push rod 140 is connected to the groove formed in the insert piston 130 in a ball shape, the other end is coupled to the yoke 150 is connected to the clutch pedal (not shown). Therefore, when the driver presses the clutch pedal, the yoke 150 connected to the clutch pedal receives force and transmits the force to the push rod 140, and the push rod 140 applies a force to the piston 120 to straighten the longitudinal direction. When the movement is applied to the clutch oil located in the cylinder (110). The clutch oil under pressure is transmitted to a release cylinder (not shown) through a release flow path connected at one end of the cylinder 110.

On the other hand, the cylinder cover 210 is coupled to the other end of the cylinder 110 to prevent the hollow groove of the opened cylinder 110. The cylinder cover 210 penetrates the push rod 140, and the engaging jaw of the cylinder cover 210 is coupled to the engaging groove formed on the outer circumferential surface of the cylinder 110 to engage with the cylinder 110. The hole through which the push rod 140 penetrates the cylinder cover 210 may be formed to be larger than the outer diameter of the push rod 140 so that the push rod 140 can move freely.

Figure 3a is a view showing a configuration in which the magnet is coupled to the piston by the magnet sheet in accordance with the present invention, Figure 3b is an enlarged view of the magnet sheet.

One end of the cylindrical piston 120 is formed with a protrusion 121 to which the magnet sheet 170 can be coupled to fix the magnet 160 and the magnet. The protrusion 121 may remove the fixing groove 123 and the magnet sheet 170 to fix the mounting portion 122 and the magnet sheet 170 to which the magnet 160 is inserted and fix the magnet 160. It is formed as a locking jaw portion 124 that eventually supports the magnet 160. The outer diameter of the fixing groove 123 is smaller than the outer diameter of the seating portion 122 and the locking jaw portion 124, the circumferential fixing groove is formed on the outer circumference between the seating portion 122 and the locking jaw portion 124. The locking jaw portion 124 may be easily coupled to the snap ring-shaped magnet sheet 170 in a tapered shape.

The magnet 160 has a ring shape and penetrates the protrusion 121 to be fitted to the seating part 122. The magnet sheet 170 is positioned in the fixing groove 123 connected to the locking jaw portion 124 through the locking jaw portion 124 in a snap ring shape. The outer diameter of the fixing groove 123 is smaller than the outer diameter of the mounting portion 122, the magnet sheet 170 is to support the inner peripheral side of the magnet 160. In this case, as shown in FIG. 3B, the magnet sheet 170 has a protrusion 175 formed on a surface facing the magnet 160, and the magnet 160 has a groove 165 corresponding thereto. Therefore, the protrusions 175 and the grooves 165 may be engaged with each other to firmly couple the magnet sheet 170 and the magnets 160, and a plurality of the protrusions 175 and the grooves 165 may be formed. In addition, a plurality of flow path grooves 127 in the longitudinal direction are formed on the outer circumferential surface of the piston 120 along the circumference. The flow path groove 127 smoothly flows the clutch oil that flows out or flows through the oil supply path 190 in the reservoir tank at the reciprocating linear motion of the piston 120.

In the above, the present invention has been described in detail with reference to the embodiments of the present invention and the accompanying drawings. However, the scope of the present invention is not limited by the above embodiments and drawings, and the scope of the present invention will be limited only by the contents described in the claims below.

120: piston 121: protrusion
122: seating portion 123: fixing groove
124: engaging jaw 160: magnet
170: magnet sheet

Claims (4)

In the clutch master cylinder is provided with a piston that is inserted into the cylinder in a longitudinally movable manner, a push rod connected to the piston for transmitting a force, and a sensor on the outside of the cylinder to sense the position of the piston,
The magnet comprises a protrusion formed at one end of the piston, an annular magnet fitted into the outer diameter of the protrusion by a forced press-fit method, and a magnet sheet fitted to fix and support the magnet at one side of the magnet. Supported clutch master cylinder. The method of claim 1,
The projecting portion is a clutch master supported by the magnet seat, characterized in that the magnet consists of a seating portion to be fixed, a fixing groove in which the magnet sheet is positioned to support the magnet, and a locking jaw portion to prevent the magnet sheet from being removed. cylinder. The method according to claim 1 or 2,
The magnet sheet is a clutch master cylinder in which a magnet is supported by a magnet sheet, characterized in that a protrusion is formed on a surface facing the magnet in a snap ring shape, and the magnet is formed with a corresponding groove. In the clutch master cylinder is provided with a piston that is inserted into the cylinder in a longitudinally movable manner, a push rod connected to the piston for transmitting a force, and a sensor on the outside of the cylinder to sense the position of the piston,
An annular magnet coupled to the outer diameter of the piston, and a magnet sheet for holding and supporting the magnet on one side of the magnet,
The magnet sheet is a clutch master cylinder in which a magnet is supported by a magnet sheet, characterized in that a protrusion is formed on a surface facing the magnet in a snap ring shape, and the magnet is formed with a corresponding groove.

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