JPS5922486Y2 - Drive transmission device in totalizer, etc. - Google Patents

Description

[Detailed description of the invention] The present invention relates to a rotational drive transmission device for a totalizer that displays the distance traveled by a vehicle, and its purpose is to reliably transmit rotational power and to facilitate assembly. There is.

In general, this type of totalizer transmits rotation from the vehicle's rotational drive source to a rotating shaft attached to the frame of the indicator, and from this rotating shaft to each transmission shaft supported inside the frame. The vehicle is configured to display the distance traveled by branching the transmission and then relaying the idle gear to sequentially drive the character wheels assembled on the frame side of the indicator from the lower digits to the higher digits.

By the way, the idle gear on the rotation transmission path to the character car group is supported by rivets on the frame, and in order to smoothly support the idle gear on the frame, the crimping pressure of the rivet is required. There is a problem that a special jig must be prepared for this purpose, and assembly is troublesome.Moreover, the rotation transmission path is limited to only one side of the frame, that is, the inner side of the frame. The problem is that it cannot be used effectively.

The present invention makes it possible to assemble the idle gear to the frame so that it can easily rotate smoothly, and also allows the transmission path of the rotation to be easily routed from one side of the frame to the other, that is, from the front side to the back side. It also makes it possible to
An embodiment of the present invention will be described in detail below based on the accompanying drawings.

In the figure, a rotating shaft 2 is supported on a bearing 3 and protrudes from the bottom of a U-shaped frame 1, and the rotation is transmitted to the rotational drive source of the vehicle via, for example, a flexible wire.
The rotating shaft 2 is connected to a speedometer mechanism 4, which is a well-known indicator.

Further, a first transmission shaft 5 supported on the frame 1 is meshed with the rotating shaft 2, and a second transmission shaft 6 is similarly supported on the frame 1 and meshed with the first transmission shaft 5. It has become.

An idle gear 7 rotatably supported on the frame 1 meshes with the second transmission shaft 6, as will be described later.

Further, in the frame 1, a character wheel 8 and a character gear 9 adjacent to its lowest digit are rotatably inserted through and supported by a shaft 10, and the idle gear 7 meshes with the character gear 9. The rotational power is transmitted to the rotating shaft 2, the first transmission shaft 5, the second transmission shaft 6, the idle gear 7, the character gear 9, and the character wheel 8 from the lower digit to the upper digit, and the mileage of the vehicle is changed. Configure it to be displayed.

Therefore, the idle gear 7 is formed into two parts, one of which has a large diameter part 11, a small diameter part 12, and an elastic part 13 integrally molded with synthetic resin, and the other has a gear 14 which is not molded. be.

Further, the large diameter portion 11 and the small diameter portion 12 are integrally connected by a shaft support portion 15 formed between them, and a tooth portion 16 is formed on the circumferential surface of the large diameter portion 11. The small diameter portion 12 has a semicircular cross section perpendicular to its axis.

The elastic portion 13 has a tapered tip 17 at the end of the small diameter portion 12, a base having a diameter larger than that of the small diameter portion 12, and a slot 18 formed in the axial direction thereof.

Further, the gear 14 has a semicircular hole 19 formed at its center, and is adapted to fit and be supported by the small diameter portion 12.

Note that the frame 1 is formed with a through hole 20 through which the shaft support portion 15 on one side of the idle gear 7 is inserted.

In the above configuration, the small diameter portion 12 on one side of the idle gear 7 is formed in the upright side wall of the frame 1 through the through hole 2.
0, at this time, the large diameter portion 11 is prevented from being removed in the insertion direction at a position where it abuts the side wall, and the shaft support portion 15 is rotatably supported in the through hole 20, and then the gear 1
4 through the small diameter portion 12 through the elastic portion 13.
By fitting the idle gear 7 into two parts, all assembly of the two-part idle gear 7 can be completed immediately and reliably.

In this case, the tip of the elastic portion 13 has a tapered surface 17, the base has a larger diameter than the small diameter portion 12, and the slot 1
8 in the axial direction of the gear 1 due to the elastic action of the tapered surface 17 and the slot 18.
By forming the hole 19 of the gear 14 and the cross section perpendicular to the axis of the small diameter portion 12 in a semicircular shape, the gear 14 can be inserted easily and reliably into the small diameter portion 1.
2 can be stably interlocked with each other, and blind movement due to sliding can be prevented.

Further, the pivot portion 15 has a diameter between the large diameter portion 11 and the small diameter portion 12, and its longitudinal dimension in the axial direction is the frame 1.
Gear 1 can be set in advance in relation to the wall thickness of
4 can be smoothly rotated.

Further, the wall surface of the frame 1 is sandwiched between the tooth portion 16 formed on the outer periphery of the large diameter portion 11 and the gear 14, and
In other words, rotational power can be directly transmitted from the outer wall side to the inner wall side of the frame 1, and the positions of the first and second transmission shafts 5 and 6 that engage directly or indirectly with this can be freely set. As a result, the indicator mechanism including the frame 1 can be made compact, and the extremely limited wall surface of the frame 1 can be effectively utilized.

Therefore, according to the present invention, it is possible to connect the idle gear 7, which is formed into two halves from both sides of the frame 1 via the wall surface of the frame 1, with a single touch, and to fit and support it, and the assembly work can be easily performed. , can be supported for smooth rotation, and to avoid interference with the indicating mechanism assembled in the frame of the indicating instrument, the transmission shaft that is branched from the rotating shaft is installed on the outside of the frame to transmit rotation. This makes it possible to organize the interior parts of the frame in a good manner, making it possible to reduce the size of the indicating instrument including the frame, which has a practical effect.

[Brief explanation of the drawing]

Fig. 1 is a front view showing one embodiment of the present invention, and Fig. 2 is a front view showing an embodiment of the present invention.
The side view of the figure and FIG. 3 are enlarged sectional views of the main parts of FIGS. 1 and 2.

Claims (1)

[Scope of utility model registration request] A rotating shaft that transmits the rotational drive of the vehicle is supported on the frame of the indicating instrument, a transmission shaft that meshes with this rotating shaft and sequentially transmits branch transmission is supported on the frame, and the rotational drive of this transmission shaft is attached to the frame. The idle gear is relayed to transmit the information to the character wheel side of the totalizer mechanism,
At least one of the transmission shafts branched from the rotating shaft is disposed outside the frame, and the idle gear that meshes with the transmission shaft is divided into two parts, one on the inside and one on the outside of the frame. The two divided idle gears are connected and fixed by sandwiching the frame, and the transmission shaft is meshed with the gear of the idle gear located outside the frame. A drive transmission device for a totalizer, etc., characterized in that the teeth of a positioned idle gear are engaged with the character wheel side.