JPS6114245Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a starwheel device for regulating the position of a camshaft notch in a camshaft controller for an electric vehicle, and particularly to a starwheel device suitable for simplifying assembly and disassembly operations.

In recent years, in vehicular camshaft controllers, small-sized operating motors have been increasingly used as a drive source for driving the camshaft. The rotational speed of this type of operating motor is generally 500 to 1000 revolutions per minute, and the capacity is often 50 to 150 watts. On the other hand, the rotational speed of the camshaft is required to be approximately 3 to 10 seconds per revolution for vehicle performance.

A gear device is used as a reduction mechanism between the camshaft and the operating motor, and a worm gear reduction method and a spur gear reduction method have been put into practical use.

Here, the worm gear reduction method has the disadvantage that the gear efficiency is low, so the capacity of the operating motor is large, and the electrical equipment that controls it also has a large electric capacity, and the camshaft control device is also large.
The spur gear reduction method was proposed as an improvement to this, and by improving the gear efficiency, it is possible to reduce the capacity of the operating motor, and the control equipment can also be of small capacity, contributing to the reduction in size and weight of the entire controller. It has the advantage of being able to However, in the case of this spur gear reduction method, it is necessary to regulate the notch position using a star wheel device in order to stabilize the notch position of the camshaft.

1 to 4 show a conventional star wheel device, which will be described below.

In Fig. 1, reference numerals 1 and 1' are star wheels mounted on the camshaft, and the outer peripheral surfaces of these star wheels 1 and 1' are provided with troughs 3 of the number of notches necessary for the controller. . A hinge portion 4 is provided in the valley portion 3 as shown in FIGS. 2 and 3.
An upper end portion of a pole 6, the lower end of which is pivotally connected via a hinge pin 5, is opposed to the pole 6. A roller 8 is rotatably attached to the upper end of the pole 6 via a bearing 7, as shown in FIG. It's getting old.

The hinge portion 4 is attached to the frame 9, and the hinge portion 4 is attached to the frame 9.
is fixed to a frame 11 together with a support frame 10 which also serves as a mounting frame for a cam contactor (not shown). A pressure spring 12 is interposed between the frame body 9 and the upper end of the pole 6, as shown in FIG. The pole 6 is biased toward the star wheels 1 and 1' through the star wheel. The protrusion of the spring seat 13 on the pole 6 side is fitted into a hole 6a provided at the upper end of the pole 6, as shown in FIG.

A stud bolt 14 whose tip end is screwed into the spring seat 12 is disposed inside the pressure spring 12 as shown in FIGS. 3 and 4, and by rotating the stud bolt 14, As shown in FIG. 2, the biasing force of the pressing spring 12 against the pole 6 is released.

In the above configuration, when a rotation command is given to an operating motor (not shown), a rotational force is transmitted to the camshaft 2 via a spur gear reduction mechanism (not shown), and the camshaft 2 rotates in the direction of arrow A or the direction of the arrow shown in Fig. 2 by the required angle. Then, the cam contactor opens and closes following the shape of the cam (not shown), and the vehicle speed is controlled.

On the other hand, the star wheels 1 and 1' mounted on the camshaft 2 similarly rotate as the camshaft 2 rotates. However, the roller 8 at the tip of the pole 6 is in the trough 3 of the star wheels 1, 1', and the pressure spring 1
Since the camshaft 2 is pressed by the urging force of the camshaft 2, the camshaft 2 rotates through the required angle and then stops at a stable position.

Here, the star wheels 1, 1' are connected to the camshaft 2.
The purpose is to balance the torque of
The pressing spring 12 normally presses the roller 8 with a biasing force of 15 to 20 kgf. Therefore, when attaching or disassembling the pole 6 to the hinge portion 4, the work must be performed while compressing the spring 12 with a large force against the biasing force of the spring 12, which is not easy.

Therefore, conventionally, as shown in FIGS. 3 and 4, the stud bolt 14, which is normally removed, is placed inside the pressure spring 12 during work, and its tip is screwed into the spring seat 13 to tighten the pressure spring 12. This causes the biasing force of the spring 12 to be released.

However, when the stud bolt is rotated, the spring seat rotates together with the stud bolt due to frictional force, and the spring seat is not equipped with any means to prevent rotation, so there is no point in using the stud bolt. Assembly and disassembly work was not easy.

The present invention was devised to solve these conventional difficulties, and its purpose is to prevent the spring seats from rotating together when tightening the stud bolt, and to simplify assembly and disassembly work. It is possible to provide a star wheel device.

The present invention focuses on the fact that the conventional difficulty was that the spring seat did not have a means to prevent it from rotating together with the stud bolt, and the circumferential surface of the spring seat is formed into a polygonal shape, so that when the spring seat rotates in tandem with the stud bolt, The spring seat can be held down with a tool such as a spanner.

The present invention will be explained below based on an embodiment shown in FIGS. 5 and 6. The present invention is characterized in that the spring seat is provided with a means to prevent it from rotating together with the stud bolt, and the other structures are exactly the same as the conventional one, so only the spring seat will be illustrated and described.

5 and 6 show the spring seat 2 according to this embodiment.
3, and its peripheral surface is formed into a regular hexagonal shape so that a tool such as a spanner (not shown) can be attached thereto. A protrusion 23a is provided on one side of the spring seat 23 to which the pressure spring 12 shown in FIGS. A protrusion 23b is provided to protrude and fit into the hole 6a. Further, the axial center of the spring seat 23 is provided with a female thread 23c into which the tip of the stud bolt 14 shown in FIGS. 3 and 4 is screwed.

In the above configuration, when the stud bolt 14 is rotated while holding the spring seat 23 with a tool such as a spanner during assembly or disassembly, the spring seat 23 is tightened without rotating together, and the pressure spring 12 is thereby tightened. The urging force of the pressing spring 12 on the pole 6 is released.

Note that when disassembling the spring seat 23, the protrusion 23b of the spring seat 23 is fitted into the hole 6a of the pole 6, and since there is resistance between them, the spring seat 23 can be removed using a tool such as a spanner.
The suppressing force of , can be reduced by that much.

7 and 8 show another embodiment of the present invention, in which the spring seat 23 whose circumferential surface is a square is used instead of the spring seat 23 whose circumferential surface is a regular hexagon. .

That is, the circumferential surface of the spring seat 23 is formed into a square shape so that a tool such as a spanner (not shown) can be attached thereto, and the pressure springs 12 shown in FIGS. 3 and 4 are mounted on both sides of the spring seat 23. Protrusion 3 to be attached
3a and a protrusion 33b that is fitted into the hole 6a of the pole 6 shown in FIG.
In addition, at the axial center of the spring seat 33, there are
A female thread 33c is provided into which the tip of the stud bolt 14 shown in the figure is screwed.

In the above configuration, when the stud bolt 14 is rotated while holding the spring seat 33 with a tool such as a spanner during assembly or disassembly, the spring seat 33 is tightened without rotating together, and the pressure spring 12 is accordingly tightened. Pole 6 of raised pressure spring 12
The biasing force on is released.

Note that when disassembling the spring seat 33, the protrusion 33b of the spring seat 33 is fitted into the hole 6a of the pole 6, and since there is resistance between them, the spring seat 33 can be removed using a tool such as a spanner.
The suppressing force of , can be reduced by that much.

In the above-described embodiments, the spring seats 23 and 33 have hexagonal or rectangular peripheral surfaces.
The spring seat may have any polygonal shape as long as a tool such as a wrench can be attached to it.

The present invention has been described above based on the preferred embodiments. According to the present invention, it is possible to effectively prevent the spring seat from rotating together with the stud bolt, so assembly and disassembly operations are extremely easy.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a conventional star wheel device, Fig. 2 is a right side view of Fig. 1, Fig. 3 is a detailed view of the main part of Fig. 2, and Fig. 4 is an enlarged sectional view of the spring seat part. , FIG. 5 is a front view showing one embodiment of the present invention, FIG. 6 is a right side view of FIG. 5, FIG. 7 is a front view showing another embodiment of the present invention, and FIG. FIG. 3 is a right side view of the figure. 1, 1'...Star wheel, 2...Camshaft,
3...Tanibe, 6...Paul, 8...Laura, 12
... Pressure spring, 14 ... Stud bolt, 23,
33... Spring seat, 23a, 23b, 33a, 33
b...Protrusion, 23c, 33c...Female thread.

Claims (1)

[Scope of utility model registration request] A star wheel having the number of notches required for the controller on the periphery is attached to the camshaft of the camshaft controller for electric vehicles, and the star wheel swings around one end as an axis in the troughs of the star wheel. The free end of the pole is engaged, and this free end is biased toward the trough side by the pressure spring through the spring seat, and the stud bolt, whose tip disposed inside the pressure spring is screwed into the spring seat, is tightened. What is claimed is: 1. A starwheel device for releasing the biasing force of a pressure spring by means of a starwheel device, characterized in that the circumferential surface of the spring seat is formed in a polygonal shape.