JPH0727384Y2 - Internal combustion engine throttle lever - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a throttle lever with a balance weight for an internal combustion engine.

[Conventional technology]

In an internal combustion engine mounted on a vehicle, a throttle valve is provided as engine control means, and an accelerator pedal is connected to the throttle valve by a cable. For this connection, a throttle lever is fixed to one end of a throttle shaft that supports the throttle valve. The throttle lever has a cable mounting part for mounting the cable, and the cable mounting part has a V-shaped or semicircular cross section arc shape so as not to deviate the position of the cable when the throttle valve rotates. It is formed so as to have a groove extending to. Such a throttle lever is disclosed in, for example, Japanese Utility Model Laid-Open No. 55-90729 and Japanese Utility Model Laid-Open No. 61-97542, and is widely used in practice.

[Problems to be solved by the invention]

A conventional throttle provided with a cable mounting portion having a groove extending in an arc shape having a V-shaped cross section as disclosed in Japanese Utility Model Publication No. 55-90729 and Japanese Utility Model Publication No. 61-97542. The lever is typically formed in a fan shape centering on the mounting hole for the throttle shaft, and has an unbalanced structure in which the weight is biased to one side when viewed from the mounting hole that is the center of rotation. Therefore, there is a problem in that vibration due to vibration becomes large, and amplified vibration is given to the throttle shaft. Also, in the case of internal combustion engines with carburetors, the throttle lever is often installed so that it is hidden under the air cleaner, which makes it difficult to see when operating the carburetor and throttle valve, making it difficult to operate by hand. There was a problem of poor sex.

[Means for solving problems]

In order to solve the above problems, according to the present invention, there is provided a throttle lever for an internal combustion engine, comprising: an attachment portion attached to a throttle shaft of an internal combustion engine; and a lever portion extending in both directions from the throttle shaft attachment portion. A drive cable attachment portion is arranged on a side of the portion extending to one side with respect to the throttle shaft attachment portion, and a portion of the lever portion extending on the other side with respect to the throttle shaft attachment portion is provided with There is provided a throttle lever for an internal combustion engine, characterized in that a balance weight having a plate-shaped manually operated lever extending along a plane parallel to an axis is arranged.

〔Example〕

FIG. 1 shows a throttle valve 12 arranged in a throttle body 10 of an internal combustion engine, and the throttle valve 12 is supported by a throttle shaft 14. In the case of an internal combustion engine with a carburetor, various links and the like are attached to both ends of the throttle shaft 14 in association with each other. The throttle lever 16 which is a typical one such as a link is a throttle shaft.
It is fixed to one end of 14 by a screw 18 and connects the throttle valve 12 to an accelerator pedal (not shown) by a cable (not shown). The throttle lever 16 has an attachment hole 20 in its middle portion for attachment to the throttle shaft 14. That is, the throttle lever 16 has a shape having lever portions extending in both directions of the mounting portion 20 attached to the throttle shaft 14.

As shown in FIG. 2, the base material of the throttle lever 16 is formed by bending a plate material into a U shape, and an attachment hole 20 is formed at the center of the main body portion in the middle of the U shape. .
A cable mounting portion 26 formed to have a groove 24 extending in an arc shape having a V-shaped or semicircular cross section is provided at the tip of one arm portion 22 of the U-shape.
Is integrated with the bent plate material by welding. Further, a torque converter shift wire mounting portion 30 for controlling the automatic transmission is provided at the tip of the arm portion 28 on the opposite side of the U-shape, which can also be integrated by welding or the like. In the case of a throttle lever in which the torque converter shift wire mounting portion 30 is not provided and only the cable mounting portion 26 is formed, it will be understood that the structure is unbalanced when the mounting hole 20 is centered as described above. .
Further, even when the torque converter shift wire mounting portion 30 is provided on the opposite side of the cable mounting portion 26, the torque converter shift wire mounting portion 30 may simply lock the wire, whereas the cable mounting portion 26 Since it is required to guide the cable so that it does not deviate, it requires a considerable arc length on the circumference around the mounting hole 20, which causes a considerable weight imbalance between these two parts. .

In the present invention, a balance weight 32 formed of a plate material as shown in FIG. 2 is integrally provided on the throttle lever 16 so that the cable mounting portion is provided.
The balance of weight against 26 can be maintained. By attaching the balance weight 32, the vibration stress of the throttle lever 16 is reduced to one-third of the conventional one, and the vibration stress of the throttle shaft 14 is reduced to one-fourth of the conventional one.

The balance weight 32 is formed of a plate material that is bent in a seated posture, and includes a lower horizontal seat portion 34 and an upper horizontal connecting portion 3
6, having a vertical lever portion 38. The upper horizontal connecting portion 36 connects the vertical lever portion 38 to the lower horizontal seat portion 34. When the balance weight 32 is integrated with the throttle lever 16, the balance weight 32 is such that the lower horizontal seat portion 34 and the upper horizontal connecting portion 36 are the lower arm of the throttle lever 16 (on the side opposite to the cable mounting portion 26). The portion 28 is inserted so as to sandwich it from above and below. At this time, the vertical lever portion 38 is oriented so as to be parallel to the cross section of the entire throttle lever 16. That is, the throttle lever 16 can be rotated by placing the finger on the vertical lever portion 38 which is located on a plane orthogonal to the cable mounting portion 26 extending in an arc shape.

FIG. 3 shows the inserted state in this way.
For simplification, the wire mounting part 30 is shown in FIG.
Is omitted. As can be seen from FIGS. 1 and 3,
The balance weight 32 is held by contacting the upper surface of the lower horizontal seat portion 34 thereof with the lower surface of the lower arm portion 28 of the throttle lever 16, and is fixed by welding at this contact portion. The upper horizontal connecting portion 36 of the balance weight 32 is formed to be spaced apart from the lower arm portion 28 of the throttle lever 16. Therefore, most of the balance weight 32 except the lower horizontal seat portion 34 is the throttle lever.
Since it is not in direct contact with 16, it has a large heat dissipation area, which allows the carburetor or throttle valve 12 to be adjusted while the engine is running. That is, the vertical lever portion 38 of the balance weight 32 serves as a heat transfer source for the throttle shaft 14 and the throttle lever 16.
Since it is far away from the
Even if the vertical lever portion 38 of 32 is operated with a finger, the user can work without feeling hot.

As shown in FIGS. 1 and 3, this vertical lever portion 38 provides relatively free finger pointing between the upper arm portion 22 and the lower arm portion 28 of the throttle lever 16. It is in a free space where you can insert your finger into this part and it will hit the vertical lever part 38 by itself without being disturbed by others. Thus, when the finger hits the vertical lever portion 38, the finger is in an orientation suitable for rotating the throttle lever 16. Thus, the operator can easily adjust the rotational angle position of the throttle lever 16 by the vertical lever portion 38. At this time, the operator can hold the gauge 40 and the like together with the vertical lever portion 38 as shown in FIG. 3 and adjust the gauge while comparing it with the reference mark or other position setting means 42 of the carburetor body. Of. Although it is difficult to finely adjust the rotational angle position of the throttle lever 16 when the cable guide portion 26 is manually held and adjusted as in the conventional art, according to the vertical lever portion 38 protruding like a knob in the free space, Adjustments can now be made very easily. Further, as in the present embodiment, as a result of providing the manual operation lever (vertical lever portion 38) integrally with the balance weight 32, it is not necessary to install the manual operation lever separately from the balance weight, so the installation space and the installation man-hour are reduced. It can be significantly reduced.

FIG. 4 shows an internal combustion engine 54 laterally arranged in an engine room 52 at the front of a vehicle 50. Vaporizer 56 is an internal combustion engine
Mounted in a position after 54, the throttle lever 16 and its cable mount 26 are mounted to the side of the carburetor 56. Then, the vertical lever part of the balance weight 32
38 is placed after the throttle lever 16 so as to cover at least the end of the throttle shaft 14, and it is possible to prevent the entry of muddy water and the like indicated by the arrow D.

[Effect of device]

As described above, according to the present invention, the throttle lever is provided with the balance weight having a function as an easily operable manual operation lever, so that the vibration of the throttle shaft can be reduced and at the same time, the carburetor and the throttle valve can be reduced. It is possible to greatly improve the workability during adjustment of. Further, since the manual operation lever is formed integrally with the balance weight, it is not necessary to separately provide a manual operation lever, and an installation space and an installation man-hour do not increase.

[Brief description of drawings]

FIG. 1 is a sectional view showing a throttle lever according to the present invention attached to a throttle shaft of an internal combustion engine, and FIG. 2 is an exploded perspective view of constituent parts of the throttle lever of FIG.
FIG. 3 is a perspective view showing a part of an integrated throttle lever, and FIG. 4 is a schematic view showing a front portion of an automobile equipped with a throttle lever according to the present invention. 12 ... Throttle valve, 14 ... Throttle shaft, 16 ...
… Throttle lever, 26 …… Cable mount, 20…
… Mounting holes, 32 …… Balance weight, 38 …… Vertical lever part.

Claims (1)

[Scope of utility model registration request] 1. A throttle lever for an internal combustion engine, comprising: an attachment portion attached to a throttle shaft of an internal combustion engine; and a lever portion extending in both directions from the throttle shaft attachment portion. Of the lever portion, the throttle shaft attachment portion. On the side extending to one side, a drive cable mounting portion is disposed, and on the side extending to the other side of the throttle shaft mounting portion of the lever portion, along a plane parallel to the axis of the throttle shaft. A throttle lever for an internal combustion engine, characterized in that a balance weight having an extending plate-like manual operation lever is arranged.