JP2006226481A - Stroke detecting structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stroke detecting structure with enhanced strength of release fork, and easily connecting the release fork to a push rod. <P>SOLUTION: The stroke detecting structure comprises a rod member 25 for rocking the release fork 4 to engage/disengage a clutch, and a stroke sensor 26 for detecting a change in the replacement of the release fork 4 to detect the operating stroke of the clutch. The rod member 25 has a guide plate 28 for mounting the stroke sensor 26. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a stroke detection structure in which a change in the amount of movement of a release fork is detected by a stroke sensor so as to detect an operation stroke of a clutch.

  FIG. 3 shows an example of a stroke detection structure applied to a conventional clutch control system. In FIG. 3, 1 is an actuator, 2 is a pull rod operated by the actuator 1, and 3 is operated by a pull fork 2 via a release fork 4. The interlocking clutch 5 is a stroke sensor that detects the amount of movement of the release fork 4 so as to detect the operating stroke of the clutch 3, and 6 is a control unit that receives a signal from the stroke sensor 5.

  The actuator 1 includes a case portion 7 that forms a predetermined internal space. In the case portion 7, a worm shaft 9 that is rotated by an electric motor 8 so as to be driven by a command from the control portion 6, and a worm shaft 9. A worm gear 12 having a meshing gear portion 10 and turning about the fulcrum pin 11, and a connecting pin 13 connected to the opposite end of the gear portion 10 of the worm gear 12, can be moved forward and backward by turning of the worm gear 12. A pull rod 2 and assist springs 14 located on both sides of the pull rod 2 are provided. Here, the pull rod 2 is connected to the release fork 4 by a release block 15 at the tip, and the release fork 4 is swung by movement in the front-rear direction (advance and retreat).

  The clutch 3 includes a clutch housing 16 that forms a predetermined internal space. In the clutch housing 16, a flywheel (not shown) connected to a crankshaft (not shown) and an engine via the flywheel are provided. A clutch disk assembly (not shown) and a pressure plate (not shown) for transmitting the power of the gear (not shown) to a transmission (not shown) are provided. The clutch disk assembly is configured such that the friction surface is pressed against the flywheel via the pressure plate. Further, the pressure plate is separated from the friction surface of the clutch disk assembly via the release bearing 18 and a diaphragm spring (not shown) by the swing of the release fork 4 with the pivot 17 as a fulcrum.

  The stroke sensor 5 is connected to the release fork 4 via a ball joint 19 so as to be positioned between the connection position of the pull rod 2 and the support position of the pivot 17, and the release fork 4 is as shown in FIGS. 3 and 4. , The concave portion 20 in which the pivot 17 is arranged at the center, the pressing portion 21 formed to be bifurcated so as to be coupled to the release bearing 18 on one side, and the release block 15 on the other side to couple the pull rod 2 And a mounting hole 23 for mounting the stroke sensor 5 between the through hole 22 and the recess 20. Here, a hemispherical arrangement portion 24 is formed in the through hole 22 for fastening the pull rod 2 so that the hemispherical release block 15 can be closely arranged.

  When the clutch 3 is “disengaged”, the worm shaft 9 is driven to rotate through the electric motor 8 in accordance with a command from the control unit 6, so that the worm gear 9 and the worm gear 12 are engaged with each other. 12, the pull rod 2 is pulled, the release fork 4 is swung, the center portion of the diaphragm spring (not shown) is pressed through the release bearing 18, and a support pin (not shown) provided at the center portion of the diaphragm spring is pressed. ) To reverse the force and pull the friction surface of the pressure plate (not shown) away from the friction surface of the clutch disk assembly (not shown), thereby disengaging the clutch 3.

  On the other hand, when the clutch 3 is set to “contact”, the worm shaft 9 and the worm gear 12 are driven by rotating the worm shaft 9 in the reverse direction via the electric motor 8 according to a command from the control unit 6. The worm gear 12 is reversely swung through the meshing to push out the pull rod 2, the release fork 4 is swung in the reverse direction, the diaphragm spring is returned to its original shape through the release bearing 18, and the pressure plate is pressed against the clutch disc assembly, The clutch 3 is set to “contact”.

  Here, when the clutch 3 is connected / disconnected, a change in the amount of movement of the release fork 4 is detected by the stroke sensor 5 at any time so as to detect the operation stroke of the clutch 3 and a signal is sent to the control unit 6. ing.

Here, as a prior art document related to the clutch, there is Patent Document 1 below.
Japanese Patent Application No. 2005-32652

  However, such a stroke detection structure has a problem in that the strength of the release fork 4 is reduced because the attachment hole 23 is formed in the release fork 4 and the stroke sensor 5 is attached. Further, when the pull rod 2 is inserted into the release fork 4 so as to attach the pull rod 2 to the release fork 4, there is no positioning between the release fork 4 and the pull rod 2, and therefore the pull rod 2 cannot be easily connected. There was a problem.

  The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a stroke detection structure that improves the strength of a release fork and easily connects the release fork and a pull rod.

  The present invention is a stroke detection structure including a rod member that swings a release fork so as to connect and disconnect the clutch, and a stroke sensor that detects a change in the amount of movement of the release fork so as to detect an operation stroke of the clutch. The rod member is provided with a guide plate to which the stroke sensor can be attached.

  In the present invention, the guide plate preferably includes a contact portion that contacts the side surface of the release fork.

  Thus, according to the present invention, since the stroke sensor is attached to the rod member via the guide plate, an attachment hole for attaching the stroke sensor to the release fork is unnecessary, and the strength of the release fork can be improved. . Further, when the rod member is inserted into the release fork, the guide plate is brought into contact with the release fork so that the rod member can be positioned. Therefore, the rod member can be easily connected.

  In the present invention, when the guide plate has a contact portion that contacts the side surface of the release fork, it constitutes a detent of the rod member with respect to the release fork. Therefore, the rod member and the stroke sensor are preferably moved relative to the release fork. be able to.

  According to the above-described stroke detection structure of the present invention, various excellent effects can be achieved in that the strength of the release fork can be improved and the release fork and the rod member can be easily connected.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 and FIG. 2 show an embodiment for carrying out the present invention, and the portions denoted by the same reference numerals as those in FIG. 3 and FIG.

  The stroke detection structure of the embodiment of the present invention includes a rod member 25 that swings the release fork 4 so as to connect and disconnect the clutch 3, a stroke sensor 26 that detects a change in the amount of movement of the release fork 4, And a control unit 6 for receiving signals.

  The rod member 25 is welded or press-fitted with a plate-shaped guide plate 28 so that the screw portion 27 is exposed on the distal end side. The guide plate 28 forms a contact portion 29 by bending both sides and guides. An attachment portion 31 having an attachment hole 30 is formed on the upper side of the plate 28.

  The release fork 4 has a concave portion 20 in which the pivot 17 is disposed at the center, a pressing portion 21 formed on one side so as to be coupled to the release bearing 18, and a hemispherical release block 15 on the other side. And a through hole 22 that couples the rod member 25 to each other, and the mounting hole 23 to which the stroke sensor 26 is attached is eliminated. Here, a hemispherical arrangement portion 24 is formed in the through hole 22 for fastening the rod member 25 so that the hemispherical release block 15 can be closely arranged.

  In the stroke sensor 26, a ball joint 36 is disposed at the tip of the sensor rod 35, and the ball joint 36 includes a screw portion 37 that extends in a direction substantially perpendicular to the sensor rod 35.

  The operation of the embodiment for carrying out the present invention will be described below.

  When connecting the rod member 25 to the release fork 4, the screw portion 27 at the tip of the rod member 25 is inserted into the through hole 22 of the release fork 4, and the rod is fixed when the guide plate 28 is brought into contact with the release fork 4. The member 25 and the release fork 4 are positioned, the hemispherical release block 15 and the lock nut 38 are fastened to the screw portion 27 of the rod member 25, and the rod member 25 is connected to the release fork 4.

  When connecting the stroke sensor 26 to the release fork 4, the screw portion 37 of the ball joint 36 of the stroke sensor 26 is inserted into the mounting hole 30 of the mounting portion 31 of the guide plate 28, and the screw portion 37 of the ball joint 36 is inserted. The lock nut 39 is fastened, and the stroke sensor 26 is connected to the release fork 4 via the guide plate 28 and the rod member 25.

  When the clutch 3 is to be disengaged, the rod member 25 is pulled via the operation means such as the actuator 1 by operating the clutch pedal or a command from the control unit 6 to swing the release fork 4 to release the release bearing 18. Is pressed against the center of the diaphragm spring, the force is reversed by a support pin (not shown) provided at the center of the diaphragm spring, and the friction surface of the pressure plate is separated from the friction surface of the clutch disk assembly. ”

  On the other hand, when the clutch 3 is set to “contact”, the rod member 25 is pushed out via the operation means such as the actuator 1 by operating the clutch pedal or a command from the control unit 6 and swinging the release fork 4 in the reverse direction. Thus, the diaphragm spring is returned to its original shape via the release bearing 18, the pressure plate is pressed against the clutch disc assembly, and the clutch 3 is "contacted".

  Here, when detecting the change amount of the release fork 4 so as to detect the operation stroke of the clutch 3, the stroke sensor 26 detects the change amount of the release fork 4 through the guide plate 28 by the forward and backward movement of the rod member 25. To do.

  As described above, according to the embodiment, the stroke sensor 26 is attached to the rod member 25 via the attachment portion 31 of the guide plate 28, so that the attachment hole 23 for attaching the stroke sensor 26 to the release fork 4 is unnecessary. Thus, the strength of the release fork 4 can be improved. Further, when the rod member 25 is inserted into the release fork 4, the guide plate 28 comes into contact with the release fork 4 so that the rod member 25 can be positioned, so that the rod member 25 can be easily connected.

  In the embodiment, when the guide plate 28 includes a contact portion 29 that contacts the side surface of the release fork 4, the guide plate 28 constitutes a rotation stop of the rod member 25 with respect to the release fork 4. 25 and the stroke sensor 26 can be suitably advanced and retracted.

  Further, since the stroke sensor 26 and the rod member 25 are connected by the ball joint 36 via the guide plate 28, even if the release fork 4 swings, the rod member 25, the guide plate 28, and the stroke sensor 26 are connected. It is possible to detect the change in the movement amount of the release fork 4 by causing the stroke sensor 26 to follow without generating stress.

  The stroke detection structure of the present invention is not limited to the above-described embodiment. The rod member may be either a push rod or a pull rod as long as the release fork is swung, and the rod member is moved. The means is not limited to the actuator, but may be other means such as a cylinder, and other various modifications may be made without departing from the scope of the present invention.

It is the schematic which shows the stroke detection structure of the embodiment which implements this invention. It is a schematic sectional drawing which shows the attachment state of a pull rod and a release fork. It is a conceptual diagram which shows the structure of the conventional clutch control system. It is a conceptual diagram which shows the shape of a release fork.

Explanation of symbols

3 Clutch 4 Release fork 25 Rod member 26 Stroke sensor 28 Guide plate 32 Release block

Claims (2)

  A rod detection structure comprising: a rod member that swings a release fork so as to connect and disconnect a clutch; and a stroke sensor that detects a change in the amount of movement of the release fork so as to detect an operation stroke of the clutch. A stroke detection structure characterized in that a guide plate to which the stroke sensor can be attached is provided on a member.   The stroke detection structure according to claim 1, wherein the guide plate includes a contact portion that contacts a side surface of the release fork.

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