JPH0526278Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention is a throttle lever device for a motor, which comprises a throttle lever connected to a reversible throttle wire and rotatably pivoted to a lever base. Regarding.

[Conventional technology]

Conventionally, this type of throttle lever device has two types: a fixed support type in which the throttle lever can be locked midway in the opening direction, and a floating type in which the throttle lever can be moved freely. , there is a problem in returning the throttle lever to the closed side immediately, and if the wing nut or butterfly bolt on the fulcrum of the throttle lever is not tightened enough, the throttle lever may slip or move due to vibration. There is a drawback that bolts etc. may become loose, and the floating type has the problem that it cannot be implemented because the working machine in which it is used does not have the characteristics of a fixed support type.

[Problem that the invention attempts to solve]

The present invention solves such problems by creating a throttle lever device that has both the features of the conventional fixed support type and floating type, and the throttle lever is securely locked during operation. To provide a throttle lever that can be easily switched between a fixed support type and a floating type, and can be switched freely and suitably from any position of a throttle lever. It is something.

[Means for solving problems]

Therefore, in the present invention, a serration and a locking body having a pawl that engages with the serration are respectively installed on either the throttle lever or the lever base, and the pawl is attached to the locking body from the serration. In addition to interposing a spring that presses in the direction of separation, a locking piece is formed that can be held in a state in which the pawl engages with the serration side when the locking body is pushed, and when it comes into contact with the locking piece, the pawl An operating lever is pivotally connected to the proximal portion of the throttle lever or lever base, and is capable of operating the locking body in the direction of the spring force so that the locking body separates from the serration.

[Effect]

Therefore, when the claw of the locking body and the serration are engaged, the throttle lever can be rotated or locked in an intermediate position, and can be operated as a fixed support type. In addition, no matter what position the throttle lever is in, operating the operating lever at hand will release the locking piece of the locking body, and the locking body will float due to the elastic pressure of the spring. However, the engagement of the pawl is released, and the throttle lever can be operated freely from any position.Furthermore, the locking piece is engaged by tensing the spring and pushing down the locking piece. This means that it can be set in a fixed support type.

〔Example〕

Next, the embodiment shown in the drawings will be described.

In Figures 1 to 7, Figure 1 shows a plan view of the main part, in which the end of the lever base B is joined to the handle rod 7 with the grip 6 of the brush cutter, and the end part of the lever base B is extended from the lever base B. A band 8 is wrapped around the handle rod 7, and its both ends are tightened and fixed with bolts and nuts 9, and the base of the throttle lever A is fitted into the inside of the lever base B so that it can freely rotate on a support shaft formed by bolts and nuts 10. pivoted to,
The pin 12 at the end of the throttle wire 1 extending through the wire receiver 11 at one end of the lever base B is fitted into the engagement hole 13 at the one end of the base of the throttle lever A to connect the throttle wire. 1 is a conventional method in which the throttle lever A is rotated from the closed position to the open position and the throttle can be operated by being biased to return the throttle valve by a spring for returning the throttle valve in the carburetor of the engine of the brush cutter. It is constructed in the same way as the shape.

On the upper side of the throttle lever A, which is a little away from the bolt nut 10, there is a bolt nut 1.
A short cylindrical boss 14 is formed on the upper side of the lever base B, which is slightly away from the bolt nut 10, and communicates with the lower part of the boss 14. The groove 15 is formed in an arc shape centered on the bolt/nut 10, and a radial guide pin 16 is fitted into the intermediate portion of the boss 14.

Reference numeral 3 denotes a locking body, the lower part of which is integrally formed with a cylindrical portion 3c that can be fitted into the boss 14, and the guide pin 1 is inserted into a long hole 17 formed in the vertical direction in the cylindrical portion 3c.
The lower end surface of the boss 14, which is one end side of the groove 15, is located outwardly at the lower end of the locking piece 3b, which is formed by inserting the inner end of the locking piece 3b and making both vertical slits around the cylindrical part 3c. A claw portion 18 that can be engaged is formed, and the boss 14
A spring 4 that presses the locking body 3 upward is fitted to the outer periphery of the upper cylindrical portion 3c. A claw 3a that can be engaged with the serration 2 is formed on the serration 2.

Reference numeral 5 denotes an L-shaped operation lever, and the portion from the middle part to one end side is attached to the lever base B.
and throttle lever A, and
A hole 19 in the middle part is fitted into the bolt nut 10 for pivotal connection, and a protrusion 20 that can be fitted into the groove 15 is fixed to one end of the lever extending downward from the groove 15, and the lever 20 extends outward. The other end of the operating lever 5 to be extended is formed with a folded piece 5a on which a finger can be caught, and the bolt nut 10 above the lever base B has both ends attached to the operating lever 5 and the lever base B side. At the same time, a spring rod 21 is fitted to press the protruding body 20 in the groove 5 toward the outer side opposite to the inner end side where the claw portion 18 of the locking body 3 engages. Configure.

Therefore, when the locking body 3 is pushed downward with tension applied to the spring 4, the claw portion 18 of the locking piece 3b protrudes into the groove 15, and the lower end surface of the boss 14 When the throttle lever A is rotated around the bolt nut 10 in this state, the pawl 3a can slide over the serration 2. , the speed can be controlled by operating the lever as shown by arrow A from the closed position to the open position, but in the middle, the throttle lever A
By locking the throttle lever A, the engine can be started, and the throttle lever A can be locked at the desired speed control position midway through the locking process. The supported type allows lever operation.

In addition, no matter what position the throttle lever A is in in such a fixed support type state, put your finger on the folded piece 5a of the operating lever 5 at hand and tension the spring rod 21 in the direction of arrow B. When the operating lever 5 is rotated, the protruding body 20, which rotates together with the operating lever 5 in the direction of the arrow C shown in FIG. As shown in FIG.
The locking body 3 is lifted up by the pressure of the claw 3a.
When the throttle lever A separates from the serration 2, the engagement is automatically released, and the throttle lever A can be operated as a floating type without resistance.

Furthermore, no matter what position the throttle lever A is in in such a floating state, when the locking body 3 is pushed down by the tension of the spring 4, the claw part 18 is pushed down to the boss as shown in FIG. The claw 3 engages with the lower end surface of the claw 14.
a becomes engaged with the serration 2, and can be easily set in a fixed support type.

8 to 10 show other embodiments, which have substantially the same structure as the previous embodiment as indicated by the same reference numerals, but the serration 2 is formed on the lever base B and the throttle lever A. The locking body 3 is attached to the boss 14, the operating lever 5 is pivotally connected to the support shaft 22 inserted into the throttle lever A, and the protruding part 20 provided midway on the operating lever 5 abuts against the claw part 18. A spring rod 21 is fitted onto the support shaft 22 so that the protruding portion 20 is pressed in a direction away from the claw portion 18.

Therefore, as in the previous embodiment, the lever can be operated by switching between the fixed support type and the floating type.

[Effect of idea]

In this way, the present invention combines the nail 3a and the serration 2.
In this way, the throttle lever A can be operated in a fixedly supported manner in the same manner as in the past, and the throttle lever A can be reliably locked without coming off even when the aircraft body vibrates. No matter what position throttle lever A is in,
When the operating lever 5 at hand is rotated, the locking piece 3b can be disengaged and the pawl 3a and the serration 2 can be disengaged, allowing the throttle lever A to be operated effectively in a free-flowing manner. Furthermore, no matter what position the throttle lever A is in, by pushing the locking body 3 and engaging the locking piece 3b, the throttle lever can be easily set to a fixed support type. It has the advantage that A can be easily switched between a fixed support type and a floating type to achieve a desired state and can be suitably implemented.

[Brief explanation of drawings]

Figure 1 is a plan view of the main parts of an embodiment of the present invention;
Figure 2 shows the right side view of Figure 1, and Figure 3 shows the right side view of Figure 1.
4 is a sectional view of a part of FIG. 1, FIG. 5 is a sectional view taken along line V-V in FIG. 4,
Figure 6 is a plan sectional view of a part of Figure 4, and Figure 7 is a partial cross-sectional view of Figure 4.
8 is a plan view of a main part of another embodiment, FIG. 9 is a bottom view of FIG. 8, and FIG. 10 is a sectional view of a part of FIG. 8. 1... Throttle wire, A... Throttle lever, B... Lever base, 2... Serration, 3a... Claw, 3... Locking body, 4... Spring, 3
b...Locking piece, 5...Operation lever.

Claims (1)

[Scope of utility model registration request] In the speed governor of a prime mover, which is constructed by rotatably pivoting a throttle lever A to a lever base B to which a return-handling throttle wire 1 is connected, a serration 2 and a pawl 3a that engages with the serration 2 are provided. A locking body 3 having a locking body 3 is installed on either the throttle lever A or the lever base B, and a spring 4 is interposed in the locking body 3 to press the pawl 3a away from the serration 2. At the same time, when the locking body 3 is pressed, a locking piece 3b is formed which can be held in a state where the claw 3a engages with the serration 2 side, and when it comes into contact with the locking piece 3b, the claw 3a engages with the serration 2 side. the locking body 3 so as to move away from the
1. A throttle lever device characterized in that an operating lever 5, which can be operated in the direction of pressure applied by a spring 4, is pivotally attached to a proximal portion of the throttle lever A or the lever base B.