JPH0751640Y2 - Integrating instrument - Google Patents

Description

[Detailed Description of the Invention] Industrial Field of the Invention [0001] The present invention relates to an integrating meter, and in particular, a plurality of integrating gears provided for each digit are coupled to each other by a pinion to rotate a plurality of integrating gears to obtain an integrated value. The present invention relates to an integrating meter for displaying.

2. Description of the Related Art Generally, in a totalizer, as shown in FIG. 6, a machine frame 1 is provided with two support shafts 2 and 3 in parallel.
In this case, six integrating cars 4-1 to 4-6 are rotatably supported. The other support shafts 3 have these integrating wheels 4-1 to 4-1.
6 pinions for shifting 5 to cooperate with 4-6
However, it is pivotally supported. These pinions 5 are interposed between each of the above-described integrating wheels and are configured to mesh with a girder feed gear 6 and two girder feed teeth 7 formed on opposite side surfaces.

Between the first integrating wheel 4-1 and the worm gear 8,
The rotation transmission gear 9 and the drive gear 10 are interposed, and the integrating wheels 4-1 to 4-6 are sequentially rotated by the rotational force of the worm gear 8 which rotates in accordance with the traveling of the vehicle and the integrated display of the traveling distance and the like is performed. . Further, in order to prevent the error due to the backlash of the integrating wheels 4-1 to 4-6 by stopping the above-mentioned six pinions 5 at the same position, conventionally, as shown in FIG. 7, the cross section of the pinion 5 has a substantially square shape. On the side of the boss 5a,
One end presses the leaf spring 11 fixed to the machine frame 1.

Conventionally, the pressing method of the leaf spring 11 against the side surface of the boss portion 5a in which the cross section of the pinion 5 is substantially square is as shown in FIG. It was pressing one side.

However, the conventional integrating instrument has a structure in which a leaf spring for preventing an error due to backlash presses one side of the substantially square boss portion in the direction of the rotation axis as a whole. Is large, as shown in Fig. 8, when the pinion rotates about 10 °, a maximum load torque of about twice the initial torque is generated, and the load torque is about twice the load torque required to prevent errors due to backlash. Driving torque is required, a motor with a larger power than necessary must be used, and there are problems that the size of the entire apparatus increases and the cost increases.

The present invention has been made in view of the above points, and an object thereof is to provide an integrating meter capable of minimizing the load torque.

Means for Solving the Problems The present invention relates to an integrating instrument for displaying an integrated value according to the rotation of a plurality of integrating gears by connecting a plurality of integrating gears provided for each digit of the integrated value to each other by a pinion, A boss portion that is integrally formed with the pinion and has a substantially square cross-section in a plane perpendicular to the rotation axis, and the boss portion that has a predetermined angle with respect to one side of the cross section of the substantially square shape and that has the rotation axis direction. And a pressing member for pressing.

Action Since the pressing member presses the substantially square boss at a predetermined angle with respect to one side of the substantially square, the maximum displacement of the pressing member due to the rotation of the boss can be reduced.

Embodiment FIG. 1 is a side view of the essential part of an embodiment of the present invention.

1 is a machine frame, 2 and 3 are spindles, 4-1 to 4-6 are integrating gears, 5
Is a pinion, 5a is a boss, and 11 is a leaf spring which is a pressing member.

The pinion 5 is formed with a boss portion 5a integrally with the gear 5b. The boss portion 5a has a substantially square cross-section on a surface perpendicular to the support shaft 3. The leaf spring 11 is fixed to the machine frame 1, and the boss portion 5a
Is pressed in the direction of the support shaft 3. By pressing the pinion 5 with the leaf spring 11, the integrating gears 4-1 to 4-6 and the pinion 5
It is configured so that the backlash does not cause a deviation.

FIG. 6 shows a sectional view of the integrating meter. As shown in FIG. 6, the integrator has two support shafts 2 and 3 provided in parallel on a machine frame 1, and the support shaft 2 has six integration wheels 4-1 to 4-. 6
It is rotatably supported. Six pinions 5 for shifting are pivotally supported on the other support shaft 3 so as to cooperate with these integrating gears 4-1 to 4-6. These pinions 5 are interposed between the above-described integrating gears and are formed on the opposite side surfaces of the integrating gears 4-1 to 4-6, respectively, and are a gear feed gear 6 and a gear feed two-tooth gear. It is set so as to mesh with 7.

A rotation transmission gear 9 and a drive gear 10 are interposed between the first integrating wheel 4-1 and the worm gear 8 fixed to the motor rotation shaft, and the rotational force of the worm gear 8 that rotates in accordance with traveling of the vehicle and the like. The accumulated vehicles 4-1 to 4-6 are sequentially rotated to display the accumulated traveling distance.

As shown in FIG. 1, the boss portion 5a has a substantially square cross section, and the vertices of the substantially square and the predetermined teeth of the pinion 5 have a phase of 10 ° to 20 °. The leaf spring 11 is configured to press against one surface of the boss portion 5a at an angle of 10 ° to 20 °. 2 and 3 show another embodiment of the present invention.

FIG. 2 shows the fixing of the leaf spring 11 of the machine frame 1 so that the pinion 5 is pressed at an angle of 10 ° to 20 ° against one surface of the boss portion 5a having a substantially square cross section. The part is tilted and one end of the leaf spring 11 is fixed.

FIG. 3 shows a configuration in which the tip of the leaf spring 11 is bent so as to press the pinion 5 at an angle of 10 ° to 20 ° against one surface of the boss 5a having a substantially square cross section. There is.

As shown in FIGS. 1 to 3, the pinion 5 has a substantially square cross section, and the boss portion 5a has a surface of 10 ° to 20 ° with respect to one surface thereof.
When the leaf spring 11 is configured to press at an angle of 0 °, the rotation angle of the pinion 5 is 0 ° to 0 °, as shown in FIG.
In the case of 45 °, the deflection change amount ΔY1 is represented by the rotation angle of the pinion 5 is θ, the inclination angle of the leaf spring 11 with respect to one surface of the boss portion 5a having a substantially square cross section, and the pinion 5 is When r is 1/2 of the diagonal length of the boss portion 5a having a substantially square cross section, ΔY1 = r {cos (45−θ1−θ) −cos (45−θ1)}.

The deflection change amount ΔY2 when the rotation angle of the pinion 5 is 45 ° to 90 ° is ΔY2 = r {cos (−45 + θ1 + θ) −cos (45−θ1)}
Becomes

However, in the case where the rotation angle of the pinion 5 is 45 ° to 90 °, the pinion 5 is initially in contact with the leaf spring 11 from the apex of the boss portion 5a having a substantially square cross section. There is a point at which the contact point of the leaf spring 11 changes at the next vertex in the direction opposite to the rotation direction of, but in that case, the length of one side of the boss portion 5a in which the cross section of the pinion 5 is substantially square is L Then, the deflection change amount ΔY3 is ΔY3 = ΔY2 + L · tan (θ1 + θ−90).

From the above equation, the inclination angle θ1 of the leaf spring 11 with respect to one surface of the boss portion 5a whose cross section of the pinion 5 is square is
By setting the angle to 10 ° to 20 °, the amount of change in the deflection of the leaf spring 11 can be reduced.

FIG. 5 shows the characteristics of the load torque with respect to the rotation angle of the boss portion 5a in such a configuration. As shown in FIG. 5, the load torque generated in the initial pinion 5 reaches the maximum value, and the pinion 5 can be driven with the minimum required drive torque.

In this way, the load torque to prevent the error due to the backlash of the gears is the minimum necessary. Therefore, the motor for driving the integrating gears is small and well extended, and the motor installation space is reduced and the motor cost is reduced. Can be reduced.

In addition, the angle between one side of the boss 5 and the leaf spring 11 is 10 ° to 20 °.
When set to, the load torque can be minimized.

As described above, according to the present invention, the boss portion fixed to the pinion and having a substantially square cross-sectional shape is pressed by the pressing member with respect to one side of the substantially square, and the pressing member is pressed. Since the maximum displacement of the motor can be minimized, the load torque by the pressing member can be reduced, and the motor that drives the pinion and integrating gear can be configured with a small size. Therefore, the motor installation space can be reduced and the entire device It has features such as miniaturization and cost reduction.

[Brief description of drawings]

FIG. 1 is a side view of an essential part of a first embodiment of the present invention, FIG. 2 is a side view of an essential part of a second embodiment of the present invention, and FIG. 3 is a third embodiment of the present invention. FIG. 4 is a side view of the main part of FIG. 4, FIG. 4 is a diagram for explaining the operation of the first to third embodiments of the present invention, and FIG. 5 is a characteristic diagram of the first to third embodiments of the present invention FIG. 6 is a cross-sectional view of the integrating instrument, FIG. 7 is a side view of a main part of a conventional example,
FIG. 8 is a characteristic diagram of a conventional example. 4-1 to 4-6 ... Accumulated gears, 5 ... Pinion, 5a ...
Boss part, 6 ... Digit feed gear, 7 ... Digit feed double-gear, 11 ... Leaf spring.

Claims (1)

[Scope of utility model registration request] 1. A totalizing instrument, wherein a plurality of totalizing gears provided for each digit of an integrated value are coupled to each other by a pinion, and the integrated value is displayed according to the rotation of the plurality of integrated gears. And a boss portion that is integrally formed with the rotary shaft and has a substantially square cross-section in a plane perpendicular to the rotation axis, and presses the boss portion in the rotation axis direction at a predetermined angle with respect to one side of the substantially square cross section. An integrating meter comprising a pressing member.