JPS6141968Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cab drum structure for an engine.

In the conventional cab drum structure, as shown in FIG. 1, a wire guide groove 4 through which an accelerator wire 3 is passed is formed around a drum 2 rotatably provided on a throttle shaft 1.
At the tip of the accelerator wire 3, a mounting hole 6 for a wire stopper 5 attached to the tip of the accelerator wire 3 and a slit 7 for inserting the accelerator wire are provided. The accelerator wire 3 is inserted into the mounting hole 6, and then the accelerator wire 3 is passed through the slit 7.

However, in this conventional structure, when assembled, the accelerator wire 3 is in the state 3a shown by the chain line, and since the drum 2 is placed in a position that is difficult to see and is obstructed by other parts, the mounting holes 6 and slits are difficult to see. It is difficult to pass the accelerator wire 3 through the slit section 7, and especially when passing the accelerator wire 3 through the slit section 7, it is difficult to pass the accelerator wire 3 due to the wire rigidity of the accelerator wire 3. Also, since the stopper 5 is small,
There was a problem in that it was difficult to make fine adjustments to fit the slit portion 7. Furthermore, if the accelerator wire 3 becomes slack as shown by the chain line 3b due to play in the accelerator wire 3, there is not only a risk that the accelerator wire 3 may come off from the wire guide groove 4;
When the accelerator wire 3 becomes slack, bending stress is applied to the tip of the accelerator wire 3 (the attachment part of the wire stopper 5) due to the resistance of the attachment hole 6 of the wire stopper 5, which may damage the tip of the accelerator wire 3. There were also drawbacks.

Therefore, the present invention has been made in view of the above-mentioned conventional drawbacks, and an object of the present invention is to provide a cab drum in which the accelerator wire can be easily assembled and the accelerator wire does not come off after assembly. That is.

In order to satisfy the above object, the present invention is constructed as follows.

That is, in the present invention, a latching notch for latching a wire stopper attached to the tip of an accelerator wire is formed at the tip of a substantially sector-shaped drum rotatably provided on the throttle shaft. A wire guide groove having a roughly-shaped cross section is provided on the outer peripheral edge of the drum, and an accelerator wire is disposed within the wire guide groove, and the accelerator wire is disposed in the wire guide groove so as to cover the wire guide groove. It is formed in an arc shape along the shape of the outer periphery of the drum,
Moreover, a guide having a length longer than the operating range of the drum is disposed outside the outer peripheral edge of the drum, and a semicircular pressing portion for pressing the wire stopper from the outside is formed at the base end of the guide. The guide is rotatably attached to the throttle shaft, and the guide is further provided with a return spring and a stopper for regulating the position of the guide, and the stopper is fixed to the carburetor body. The engine has a cab drum structure.

The present invention will be explained below with reference to the embodiments shown in FIGS. 2 to 4. Note that the same parts as in the conventional example shown in FIG. 1 are represented by the same numbers.

A semicircular hooking notch 8 is formed at the tip of the substantially fan-shaped drum 2 to hook a wire stopper 5 attached to the tip of the accelerator wire 3. Further, a wire guide groove 4 having a path-like cross section is provided in the arcuate outer peripheral edge 2a of the drum 2, and the accelerator wire 3 is disposed within the wire guide groove 4. The outer peripheral edge 2 of the drum 2 covers the wire guide groove 4.
A guide 9 is formed in an arc shape along the shape of the drum 2 and has a length longer than the operating range of the drum 2. The guide 9 is disposed outside the outer peripheral edge 2a of the drum 2. Further, the guide 9 is formed with a roughly shaped cross section, and includes a flange 9d that extends to a position where it overlaps the outer peripheral edge 2a of the drum 2, and an inner wall 9e that contacts the accelerator wire 3 even if it becomes slack and prevents it from coming off. There is. Furthermore, a semicircular holding part 9a is formed at the base end of the guide 9 to press the wire stopper 5 fitted into the latching notch 8 from the outside. The inserted insertion hole 9c is rotatably fitted into the throttle shaft 1. A return spring 10 is hooked onto the upper end of the guide attachment piece 9b. The return spring 10 causes the semicircular presser portion 9 to
a is made to come into pressure contact with the wire stopper 5, and when the semicircular presser part 9a is in pressure contact with the wire stopper 5, the guide mounting piece 9b is also received by the guide stopper 11 by the return spring 10. It is made so that it can be done. The shaft tube portion 11a of the guide stopper 11 is inserted into the throttle shaft 1, and the shaft tube portion 11a is inserted into the carburetor body 12.
Fixed. 13 is a hook provided at the upper end of the guide mounting piece 9b and used to move the guide 9 by hand against the return spring 10; 14 is a hook provided on the drum 2;
This hook is provided on the drum 2 to move it by hand. Additionally, drum 2 is the throttle shaft 1.
A return spring (not shown) is provided.

Next, to explain the procedure for assembling the accelerator wire 3, first pull the hook 13 and move the guide 9 against the return spring 10 in the direction opposite to the direction of the accelerator wire 3 (in the direction of arrow E shown in FIG. 2). Rotate to create a gap between the guide 9 and the drum 2. Next, the wire stopper 11 is fitted into the latching notch 8, and the guide 9 is returned to its original position. As a result, the semicircular holding part 9a is pressed against the wire stopper 5 by the force of the return spring 10, and the wire stopper 5 is connected to the hooking notch 8 and the semicircular holding part 9 of the guide 9.
Supported by a. Further, when the accelerator pedal is depressed, the accelerator wire 3 is pulled and the drum 2 rotates, but the wire stopper 5 is formed in an arc shape along the shape of the outer peripheral edge 2a of the drum 2 both when it is pulled and when it returns. Since the guide 9 moves inside the flange end 9d of the flange 9 within the range in which the guide 9 extends, it does not come off the drum 9. At this time, the guide 9 comes into contact with the guide stopper 11 and is held down by the return spring 10, so that it does not move. The accelerator wire 3 is normally located within the wire guide groove 4, but even if the accelerator wire 3 becomes slack when returning, it will not come off because it contacts the inner wall 9e of the guide 9.

As described above, according to the present invention, even if the assembly part of the accelerator wire is difficult to see, there is no need to insert it into a hole or slit as in the conventional case, and the wire stopper can be attached to the hook provided at the tip of the drum. Assembling is easy because it only needs to be hooked into the stop notch. Further, even if the accelerator wire tries to slack due to play in the accelerator wire, the guide catches the slack, so that the accelerator wire does not come off the drum. When the drum returns, the wire stopper precedes the latching notch at the tip of the drum in the direction of the semicircular holding part of the guide by the amount of play the accelerator wire has, so no unreasonable force is applied to the joint between the wire stopper and the accelerator wire. .

[Brief explanation of the drawing]

Fig. 1 is a side view showing a conventional cab drum structure, Fig. 2 is a side view showing a cab drum structure of an engine according to the present invention, Fig. 3 is a sectional view taken along line A-A' in Fig. 2, and Fig. 4 is FIG. 3 is a longitudinal sectional front view showing a supporting portion of the wire stopper. 1...Throttle shaft, 2...Drum, 3
... Accelerator wire, 4 ... Wire guide groove, 5
...Wire stopper, 8...Locking notch, 9...
Guide, 9a...Semicircular presser part, 10...Return spring, 11...Guide stopper, 12
...The carburetor body.

Claims (1)

[Scope of utility model claims] A latching notch for latching a wire stopper attached to the tip of an accelerator wire is formed at the tip of a drum that is rotatably provided on the throttle shaft and is approximately fan-shaped. A wire guide groove having a roughly shaped cross section is provided on the outer peripheral edge of the drum, and an accelerator wire is disposed within the wire guide groove. A guide is formed in an arc shape along the shape and has a length longer than the operating range of the drum, and is disposed outside the outer peripheral edge of the drum, and the wire stopper is placed outside the base end of the guide. The guide is rotatably attached to the throttle shaft, and the guide is further provided with a return spring and a stopper for regulating the position of the guide, and the stopper is attached to the carburetor shaft. The cab drum structure of the engine is characterized by being fixed to the main body.