JP2008074177A - Clutch operating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch operating device operable by a smaller force. <P>SOLUTION: The clutch operating device comprising a main clutch lever 30 used for the turning-on/off of a clutch comprises a lock member 35 for holding the main clutch lever 30 in a turn-on position. The lock member 35 can turn the main clutch lever 30 between a locked position holding the main clutch lever 30 in the turned-on position and an unlocked position releasing the main clutch lever 30 from the held state. An auxiliary clutch lever 41 is provided to turn the lock member 35 between the locked position and the unlocked position. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a clutch operating device for a prime mover such as an engine.

  A so-called belt clutch is widely used as a clutch for agricultural machines such as management machines (see Patent Document 1). In a belt clutch, a tension pulley attached to the tip of a tension arm that is rotatably installed is pressed against the belt to apply tension to the belt or released from the belt to release the tension. Done. The tension arm is rotated by being pulled by the wire.

The wire is connected to a clutch lever or the like installed near the handle of the agricultural machine, and the clutch can be turned on and off by operating the clutch lever. The wire is connected to the clutch lever in a tensioned state, and when the clutch lever is moved between the on position and the off position, the wire moves over the fulcrum of the clutch lever (over the fulcrum). It is connected to the clutch lever so that the positional relationship is such that
JP 7-323744 A

  By the way, in the clutch operating device having the above-described structure, the fulcrum is exceeded during the clutch lever operation, regardless of whether the operation is on or off. Since the position beyond the fulcrum is a position where the tension pulley is pressed against the belt with the strongest force, a clutch lever that moves beyond the fulcrum during the operation requires a large force for the operation.

  This invention is made | formed in view of such a problem, and makes it a subject to provide the clutch operating device which can be operated with a smaller force.

  The present invention is a clutch operating device provided with a main clutch lever used for turning on and off of a clutch, which is rotatably installed at an on position corresponding to a clutch on and off positions corresponding to a clutch off state. A lock member for holding the main clutch lever in the engaged position, the lock member holding the main clutch lever in the engaged position, and an unlocking position for releasing the hold state. And an auxiliary clutch operating member that rotates the lock member to the locked position and the unlocked position.

  The main clutch lever includes an operation portion to which an operating force is applied, the auxiliary clutch operation member includes an auxiliary clutch lever for rotating the lock member, and the auxiliary clutch lever is The main clutch lever is provided with an operation portion that is rotatably installed at a lock position corresponding to a lock position of the lock member and an unlock position corresponding to the unlock position and to which an operation force is applied. The stroke of the operating portion may be longer than the stroke of the operating portion of the auxiliary clutch lever.

  The main clutch lever is biased in a direction to rotate from the on position to the off position, and the lock member engages with the main clutch lever located at the on position to move to the off position. An engagement portion that prevents the rotation of the main clutch lever. The rotation direction of the engagement portion may be a direction that intersects the rotation direction of the main clutch lever.

  The present invention is a clutch operating device provided with a main clutch lever used for turning on and off of a clutch, which is rotatably installed at an on position corresponding to a clutch on and off positions corresponding to a clutch off state. A lock member for holding the main clutch lever in the engaged position, and the lock member rotates between a locked position for holding the main clutch lever in the engaged position and an unlocked position for releasing the held state. It is possible to provide a clutch operating device including an auxiliary clutch operating member that rotates the lock member to a locked position and an unlocked position.

  In this clutch operating device, when the main clutch lever is rotated to the engaged position, the clutch is engaged, and when the auxiliary clutch operating member is operated to rotate the lock member from the locked position to the unlocked position, the main clutch lever Can be turned to the cutting position, and when the clutch is turned to the cutting position, the clutch is turned off. Thus, in the present invention, the main clutch lever is held in the on position or rotated to the cut position using the lock member instead of using the fulcrum crossing structure. If there is no movement beyond the fulcrum, the main clutch lever can be operated with a smaller force, and the operability is improved.

  Further, in this clutch operating device, a main clutch lever used for the entering operation and an auxiliary clutch operating member used for the disengaging operation are provided separately. Therefore, the main clutch lever can be arranged at a position suitable for the entering operation, and the auxiliary clutch operating member can be arranged at a position suitable for the turning operation. For example, the position of the main clutch lever is preferably a position where it is easy to apply an operating force, and the auxiliary clutch operation member is preferably a position where an instant turning operation can be performed, such as near the normal gripping position.

  The main clutch lever includes an operation unit to which an operating force is applied, the auxiliary clutch operation member includes an auxiliary clutch lever for rotating the lock member, and the auxiliary clutch lever It is provided with an operation part that can be rotated at a lock position corresponding to the lock position and an unlock position corresponding to the unlock position, and an operation force can be applied. The stroke of the operation part of the main clutch lever is Further, it may be longer than the stroke of the operation portion of the auxiliary clutch lever.

  When the stroke of the operation portion of the main clutch lever is lengthened, the clutch can be easily put into a so-called half-clutch state. If it can be in a half-clutch state, an agricultural machine such as a management machine can be operated more flexibly, and the operability of the agricultural machine is improved. On the other hand, if the stroke of the auxiliary clutch lever is shortened, the clutch can be disconnected in a short time, and the operability is improved.

  Further, the main clutch lever is biased in a direction to rotate from the on position to the off position, and the lock member engages with the main clutch lever located at the on position to prevent rotation to the off position. The engaging portion may be provided, and the rotation direction of the engaging portion may be a direction that intersects the rotation direction of the main clutch lever.

  In the clutch operating device having such a structure, when the lock member is rotated from the lock position to the unlock position, the engagement between the engagement portion of the lock member and the main clutch lever is released, and the engagement position is changed from the entry position to the cut position direction. The biased main clutch lever automatically rotates to the disengaged position, and the clutch is disengaged. Here, if the rotation direction of the engaging portion is a direction intersecting with the rotation direction of the main clutch lever, when the lock member is rotated by operating the auxiliary clutch lever, the rotation direction of the main clutch lever It is only necessary to apply a force for removing the position of the engaging portion from the path, and it is not necessary to apply a force against the biasing force applied to the main clutch lever, so the auxiliary clutch lever can be operated with a small force. The clutch can be disengaged. If the clutch can be disengaged with a small force, it can be surely disengaged when it is desired to disengage the clutch, and the operability of the clutch is improved.

  Hereinafter, an embodiment of a management machine according to the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 1, the management machine 1 includes an engine (prime mover) 11 mounted on a body frame 10. The output shaft 11a of the engine 11 is linked to the input side of the transmission case 13 via a power transmission belt (hereinafter referred to as a belt) 12, and the output side of the transmission case 13 is connected to the traveling unit 20 via a sprocket-chain. The axle 21 and the tilling shaft 23 of the tilling portion 22 are interlocked and connected.

  A tension arm 14 is swingably attached to a position adjacent to the belt 12. A tension roller 15 for applying tension to the belt 12 is attached to the tip of the tension arm 14, and an inner wire 17 a (a clutch wire 17) (described later) is attached to the tension arm 14 via a tension spring 16. One end side of (see FIG. 2) is interlocked and connected. Therefore, when the inner wire 17a is pulled, the tension roller 15 is pressed against the belt 12, tension is applied to the belt 12, and the clutch is engaged so that the rotational output of the engine 11 is transmitted to the mission. When the tension state is released, the state in which the tension roller 15 is pressed against the belt 12 is released, the tension is reduced, and the clutch is disengaged so that the rotation output is not transmitted.

  A base end portion of a handle 18 used for steering the management machine 1 is attached to an upper portion of the rear end side (right side in the drawing) of the body frame 10. In FIG. 1, reference numeral “19” denotes a fuel tank. In addition, since the traveling part 20 and the tilling part 22 are well-known structures, the detailed structure was abbreviate | omitted.

  The handle 18 is composed of two rod-like operating arms 25 (only the left side is shown) arranged in a substantially gate shape in plan view. The driving arm 25 is made of a hollow pipe material, and is attached to the body frame 10 in a state in which the driving arm 25 is inclined to a front low and a high back. Further, a grip portion 25a for the operator (only the left side is shown) is provided at the rear end portion of the driving arm 25.

  A main clutch lever 30 used for clutch on / off operation is attached to one driving arm 25 (left side in the present embodiment). Further, an auxiliary clutch lever 41 of an auxiliary clutch operating member 40 described later is attached at a position close to the grip portion 25a of the driving arm 25. The operator of the management machine 1 can turn on the clutch by operating the main clutch lever 30, and can turn the clutch off by operating the auxiliary clutch lever 41.

  As shown in FIG. 2, a frame 26 that supports the clutch operating device is attached to the operating arm 25, and the main clutch lever 30 can be rotated via a rotating shaft 50 to the frame 26. It is attached. As shown in FIG. 3, the frame 26 is provided with a lock member 35 for holding the main clutch lever 30 in the entering position (position shown by a solid line in FIGS. 2 and 3) and an auxiliary. A later-described auxiliary clutch operating member 40 having a clutch lever 41 is attached.

  Further, as shown in FIG. 2, the other end of the outer tube 17b of the clutch wire 17 is connected to the frame 26, and the other end of the inner wire 17a protruding from the other end of the outer tube 17b is connected to the main clutch lever. 30. Therefore, when the main clutch lever 30 is operated, the inner wire 17a is pulled and the tension roller 15 is pressed against the belt, or the pressing state is released, and the clutch is turned on and off. The inner wire 17a is interlocked with the tension arm 14 via the tension spring 16, and is always pulled in the direction of the arrow A.

  The main clutch lever 30 includes an operation side arm portion 31 that extends from the position of the rotation shaft body 50, and includes a grip portion 31a at the tip of the operation side arm. The grip portion 31a corresponds to an operation portion to which an operation force is applied. Further, the main clutch lever 30 is provided with a working arm portion 32 extending in a direction different from the operation side from the rotation position (in the present embodiment, in the orthogonal direction upward). The other end of the inner wire 17a is connected. As described above, one end of the inner wire 17a is connected to the tension arm 14, and the inner wire 17a transmits the power when the main clutch lever 30 is engaged and disengaged to the tension arm 14 that is a clutch mechanism. It has become.

  Therefore, when the main clutch lever 30 is rotated in the entering operation direction B indicated by the arrow B and moved to the entering position (the position indicated by the solid line in FIGS. 2 and 3), the inner wire 17a is pulled and the clutch is engaged. It becomes a state. Further, when the main clutch lever 30 in the entering position is rotated in the cutting operation direction C indicated by the arrow C and moved to the cutting position (the position indicated by the two-dot chain line in FIGS. 2 and 3), the inner wire 17a moves backward. Moves back and clutch is disengaged. In this way, the main clutch lever 30 can be turned to the on position and the off position.

  As described above, the inner wire 17a is linked to the tension arm 14 via the tension spring 16 (see FIG. 1), and is always connected to the main clutch lever 30 in a state where tension is applied. That is, the main clutch lever 30 is always pulled in the direction of the arrow A. Therefore, the main clutch lever 30 is always urged in the turning operation direction C.

  As shown in FIG. 3, the lock member 35 is attached to the frame 26 so as to be rotatable in the lock direction D and the unlock direction E, and holds the main clutch lever 30 in the engaged position. (Refer to FIG. 3) and an unlocking position for releasing from the holding state.

  Further, the lock member 35 includes an engagement portion 36 that engages with the main clutch lever 30 located at the entering position and stops the rotation of the main clutch lever 30 in the cutting operation direction C. Therefore, when the lock member 35 is positioned at the lock position in a state where the main clutch lever 30 is positioned at the on position, the engaging portion 36 is engaged with the side edge of the main clutch lever 30, and the turning operation direction of the main clutch lever 30 is determined. Rotation to C is prevented. When the lock member 35 is positioned at the unlock position, the engagement between the engaging portion 36 and the main clutch lever 30 is released, and the main clutch lever 30 is automatically turned off by the urging force transmitted from the inner wire 17a. It turns in direction C and turns to the cutting position.

  Further, the back surface 36b of the engaging portion 36 of the lock member 35, that is, the opposite of the contact surface 36a that contacts the main clutch lever 30 when the main clutch lever 30 located at the entering position is prevented from rotating in the turning operation direction. The back surface 36b which is the side is an inclined surface. The back surface 36b is a surface on which the main clutch lever 30 that has been rotated in the entering operation direction B from the cutting position toward the entering position contacts, and when the main clutch lever 30 contacts the back surface 36b, the lock member 35 is Then, it is pushed by the main clutch lever 30 that comes into contact with the back surface 36b while sliding, and rotates in the unlocking direction E. Therefore, when the main clutch lever 30 is turned in the entering operation direction B, the main clutch lever 30 is brought into the entering position without operating the auxiliary clutch lever 41 and without being hindered by the engaging portion 36 of the lock member 35. The clutch can be put into an engaged state.

  The rotation direction of the lock member 35 is a direction orthogonal to the rotation direction of the main clutch lever 30, and the both rotation directions intersect each other. With this arrangement, the lock member 35 can be rotated without applying a force to the lock member 35 to counter the biasing force applied to the main clutch lever 30. That is, the operating force required for operating the auxiliary clutch lever 41 can be minimized.

  The auxiliary clutch operating member 40 is a spring that is an urging means for urging the lock member 35 in the lock direction D, and an auxiliary clutch lever 41 that is rotatably attached to the frame 26 via the rotation shaft body 60. 43 and a wire 44 that is a power transmission member that transmits the rotation of the auxiliary clutch lever 41 to the lock member.

  The auxiliary clutch lever 41 is attached to the frame 26 so as to be rotatable in the engagement direction F and the release direction G, and is in a lock position (see FIG. 3) corresponding to the lock position of the lock member 35 (see FIG. 3). And a unlock position corresponding to the unlock position (a position indicated by a two-dot chain line in FIG. 3). And the auxiliary clutch lever 41 is provided with the finger | toe pushing part 42a at the front-end | tip. This finger pressing portion 42a corresponds to an operation portion to which an operating force is applied. The finger pressing part 42a is arranged at a position close to the grip part 25a of the driving arm 25. Therefore, the operator of the management machine 1 can press the finger pressing part 42a with any finger (for example, thumb) while maintaining the gripping part 25a of the driving arm 25 with the corresponding hand (left hand). .

  The spring 43 is attached to the frame 26 in a state in which an urging force in the lock direction D is applied to the lock member 35. One end of a wire 44 is connected to the auxiliary clutch lever 41, and the other end of the wire 44 is connected to a lock member 35.

  Therefore, when an operating force is applied to the finger pressing portion 42a of the auxiliary clutch lever 41 and the auxiliary clutch lever 41 is rotated in the release direction G, the movement is transmitted to the lock member 35 via the wire 44, and the lock The member 35 rotates in the unlocking direction E against the biasing force from the spring 43. When the operation force applied to the finger pressing portion 42 a is released, the lock member 35 is rotated in the lock direction D by the urging force from the spring 43, and the rotation of the lock member 35 is performed via the wire 44 through the auxiliary clutch lever. 41, the auxiliary clutch lever 41 rotates in the engagement direction F.

  In the clutch operating device according to the present embodiment, the stroke S1 (see FIG. 2) of the grip portion 31a that is the operating portion of the main clutch lever 30 is the stroke S2 of the finger pressing portion 42a that is the operating portion of the auxiliary clutch lever 41 (see FIG. (See FIG. 3).

  Thus, if the stroke S1 of the operation part of the main clutch lever 30 is lengthened, it becomes easy to make the clutch into a so-called half-clutch state. If the clutch can be brought into the half-clutch state, an agricultural machine such as a management machine can be operated more flexibly, and the operability is improved. On the other hand, if the stroke S2 of the auxiliary clutch lever 41 is shortened, the clutch can be operated in a short time and the operability is improved.

  Next, the clutch on / off operation in the management machine 1 will be described.

  First, an operation for putting a clutch in a disengaged state into an engaged state will be described.

  The main clutch lever 30 indicated by a two-dot chain line in FIG. 2 is located at the disengagement position. In this state, the clutch is disengaged.

  When the clutch is brought into the engaged state from this state, an operating force is applied to the grip portion 31 a of the main clutch lever 30 to rotate the main clutch lever 30 in the engaged operation direction B. Then, the inner wire 17a is pulled, the tension roller 15 is pressed against the belt 12, and a part of the rotation of the output shaft 11a is transmitted to the transmission case 13 side via the belt.

  When the main clutch lever 30 is further entered and rotated in the operation direction B, the main clutch lever 30 contacts the back surface 36 b of the engaging portion 36 of the lock member 35. Then, the lock member 35 is pushed in the unlock direction E by the main clutch lever 30, and rotates in the unlock direction E against the urging force of the spring 43. When the main clutch lever 30 is further turned and turned in the operation direction B, the main clutch lever 30 reaches the on position and the clutch is engaged.

  Further, when the main clutch lever 30 reaches the engaged position, the lock member 35 is released from the state of being pushed from the main clutch lever 30 and is rotated in the lock direction D by the biasing force of the spring 43. The engaging portion 36 is engaged with the main clutch lever 30. In this state, the main clutch lever 30 is held in the engaged position even when the operating force applied to the grip portion 31a or the like is released.

  Thus, according to the apparatus of the present embodiment, the clutch in the disengaged state can be easily put into the half-clutch state and can be brought into the engaged state simply by rotating the main clutch lever 30. Further, since the so-called fulcrum is not exceeded when the main clutch lever 30 is rotated from the disengaged position to the entered position, the operating force required for operating the main clutch lever 30 can be minimized.

  Next, the operation for disengaging the clutch in the engaged state will be described.

  The main clutch lever 30 indicated by a solid line in FIG. 2 is located at the engaged position, and in this state, the clutch is in the engaged state.

  When the clutch is disengaged from this state, an operating force is applied to the finger pressing portion 42a of the auxiliary clutch lever 41 to rotate the auxiliary clutch lever 41 in the release direction G. Then, the rotation is transmitted to the lock member 35 via the wire 44, and the lock member 35 rotates in the unlocking direction E against the urging force from the spring 43.

  Then, the engagement between the engagement portion 36 of the lock member 35 and the main clutch lever 30 is released. Then, the main clutch lever 30 is rotated in the cutting operation direction C by the urging force in the direction of arrow A received from the inner wire 17a, reaches the position, and the clutch is disengaged.

  Thus, according to the apparatus of the present embodiment, the engaged clutch can be easily put into the disengaged state simply by rotating the auxiliary clutch lever 41.

  Further, since the rotation axis direction of the lock member 35 is orthogonal to the rotation axis direction of the main clutch lever 30, the engagement portion 36 of the lock member 35 is located at the entering position. Even when the clutch 30 is engaged, the main clutch lever 30 can be rotated without rotating. If the main clutch lever 30 does not need to be rotated when the lock member 35 is rotated, a force to counter the biasing force applied to the main clutch lever 30 is applied to the lock member 35. The lock member 35 can be rotated without any problem. Therefore, the operating force required for operating the auxiliary clutch lever 41 can be minimized.

It is a left view which shows the management machine provided with the clutch operation apparatus of embodiment which concerns on this invention. FIG. 6 is an enlarged right side view partially showing a cross-section showing a clutch operating device in a clutch-engaged state installed in a left driving arm portion of a management machine. It is an arrow line view which shows the state seen from the arrow X direction shown by FIG.

Explanation of symbols

10 Airframe Frame 11 Engine (Motor)
12 Power transmission belt (belt)
13 Transmission case 14 Tension arm 15 Tension roller 16 Spring 17 Clutch wire 18 Handle 25 Driving arm 26 Frame 30 Main clutch lever 31 Operation side arm 35 Locking member 36 Engaging portion 40 Auxiliary clutch operating member 41 Auxiliary clutch lever 43 Spring 44 Wire B Entering operation direction C Cutting operation direction D Locking direction E Unlocking direction F Engaging direction G Release direction

Claims (3)

A clutch operating device that is rotatably installed at an engagement position corresponding to a clutch engagement state and a disengagement position corresponding to a clutch disengagement state, and includes a main clutch lever used for clutch on / off operation,
A lock member for holding the main clutch lever in the entering position;
The lock member is rotatable to a lock position for holding the main clutch lever at the entry position and an unlock position for releasing the hold state.
A clutch operating device comprising an auxiliary clutch operating member for rotating the lock member to the locked position and the unlocked position. The main clutch lever includes an operation unit to which an operation force is applied,
The auxiliary clutch operating member includes an auxiliary clutch lever for rotating the lock member;
The auxiliary clutch lever includes an operation unit that is rotatably installed at a lock position corresponding to the lock position of the lock member and an unlock position corresponding to the unlock position and to which an operation force is applied. And
The clutch operation device according to claim 1, wherein a stroke of the operation portion of the main clutch lever is longer than a stroke of the operation portion of the auxiliary clutch lever. The main clutch lever is biased in a direction to rotate from the entry position to the cut position,
The lock member includes an engagement portion that engages with the main clutch lever located at the entry position and prevents rotation to the cut position;
The clutch operating device according to claim 1 or 2, wherein a rotation direction of the engaging portion is a direction intersecting with a rotation direction of the main clutch lever.

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