JPS638997Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an integration device that measures, for example, the distance traveled by a vehicle.

For example, a vehicle speedometer incorporates an integrating device consisting of a total mileage accumulator (odometer) and a mileage accumulator (tripmeter) that can return the mileage count to zero at any time.

In this type of totalizing device, in order to make the entire speedometer more compact when the character wheel is driven by a step motor, the present inventor has already proposed a totalizer, that is, a step motor, which is inserted inside the character wheel. It is possible to use a totalizer (Utility Application No. 1979-97936), insert a step motor into the character wheel of one of the two totalizers, and drive the character wheel of the two totalizers with the step motor. It is possible, but the outer diameter of the character wheel cannot be increased unnecessarily, and this limits the size of the step motor.
One step motor had the disadvantage that it was difficult to obtain the torque necessary to drive the character wheels of two totalizers.

The present invention was made to solve the above-mentioned drawbacks, and when driving two totalizer character wheels with one step motor, the drive torque of the step motor can be increased without increasing the outer diameter of the character wheel. It is an object of the present invention to provide an integration device that can increase the

The present invention will be described in detail below based on an embodiment shown in the drawings.

Reference numeral 1 denotes a six-pole magnetized permanent magnet rotor, which faces each other and is rotatably supported inside a pair of three stator poles 2 and 2'. The stator poles 2, 2' are housed inside a cylindrical housing 3 made of a non-magnetic material. On the outer periphery of the cylindrical housing 3, there are a plurality of letters with the housing as a common axis. Cars 4 ₁ to 4 ₇ are rotatably supported. The plurality of character wheels 4 ₁ to 4 ₇ are rotationally connected to each other via a plurality of shift pinions 5 ₁ to 5 ₆ .
Each of the pair of stator poles 2, 2' is magnetically coupled to both ends of the coil core 7 via magnetic yokes 6, 6' that abut the side surfaces thereof. 8
is a coil, and this coil 8 is connected to the coil core 7.
It is wound on the outside of the body via a bobbin 9 made of a non-magnetic material. A cylindrical housing 10 made of a non-magnetic material is disposed outside the coil 8, and a plurality of character wheels 11 ₁ to 11 ₄ having the housing as a common axis are arranged on the outer periphery of the housing 10. Rotatably supported. The plurality of character wheels 11 ₁ to 11 ₄ are connected to the plurality of shift pinions 12 ₁ to 12 .
They are rotationally coupled to each other via 12 ₃ . In addition,
In this embodiment, a totalizing mechanism including a plurality of character wheels 4 ₁ to 4 ₇ and pinions 5 ₁ to 5 ₆ is referred to as a first totalizer A, and a plurality of character wheels 11 ₁ to 11 ₄ and a pinion 12 The integration mechanism including ₁ to 12 ₃ is configured as a second integration meter B.

The configuration of this embodiment has been described above, and its operation will be described next. When a polarized pulse whose polarity is alternately positive and negative is input to the coil 8, the magnetic yoke 6,
Through 6', the pair of stator poles 2, 2' alternately become N and S poles, thereby causing the rotor 1 to rotate in steps. Incidentally, in order to rotate the rotor 1 in one direction, the tips of the stator poles 2 and 2' are provided with tapers for unidirectional rotation, so the rotor 1 always rotates in a fixed direction. Then, the output of the rotor 1 is reduced through gear reduction, and then the lowest digit character wheel 41 of the first totalizer A, which is an odometer, and the second character wheel ₄₁ , which is a trip meter, for example.
is transmitted to the lowest digit character wheel 11 ₁ of totalizer B,
Both totalizers A and B are driven by one rotor 1.

As described above, the present invention has a pair of stator poles 2, 2' arranged so as to surround the outer periphery of the permanent magnet rotor 1, which are formed into a cylindrical shape, and a plurality of digits arranged on the outer periphery of the stator poles. A first totalizer A is constructed by rotatably disposing a plurality of character wheels 4 ₁ to 4 ₇ rotatably coupled by pinions 5 ₁ to _{5 6} , and the pair of stator poles 2 and 2' are magnetically connected. York 6,
A plurality of character wheels 11 1 to 11 ₄ are rotatably coupled to the outer periphery of the excitation coil 8 by a plurality of shift pinions _{12 1} to 12 ₃ . is rotatably arranged and the second
an integrating device B, further comprising a least significant digit character wheel 4 ₁ , 11 ₁ of the first and second integrating meters A, B, which are rotationally coupled to the permanent magnet rotor 1. Therefore, according to this integration device,
Since the permanent magnet rotor 1 and the excitation coil 8 that make up the step motor are made separate, the outer diameter of the permanent magnet rotor 1 and the number of turns of the excitation coil 8 can be set larger than in the conventional case. It is possible to obtain torque that can drive both meters at the same time. In addition, there is an effect that there is almost no space increase and it is possible to make it more compact.

[Brief explanation of the drawing]

The drawing is a sectional view showing an embodiment of the integrating device according to the present invention. A...first totalizer, B...second totalizer, 1...
...Permanent magnet rotor, 2,2'...Stator pole,
3...Housing, 4 ₁ ~ 4 ₇ ... Letter wheel, 5 ₁ ~
5 ₆ ... Digit pinion, 6, 6' ... Magnetic yoke, 7 ... Coil core, 8 ... Coil, 9 ... Bobbin, 10 ... Housing, 11 ₁ - 11 ₄ ... Character wheel, 12 ₁ - 12 ₃ ...Digit pinion.

Claims (1)

[Scope of utility model registration request] A pair of stator poles 2, 2' arranged to surround the outer periphery of the permanent magnet rotor 1 are formed into a cylindrical shape, and are rotated by a plurality of shift pinions ₅₁ to ₅₆ around the outer periphery of the stator poles. A first totalizer A is constructed by rotatably disposing a plurality of connected character wheels ₄₁ to ₄₇ , and the pair of stator poles 2, 2' are connected to each other via magnetic yokes 6, 6'. An excitation coil 8 to be excited is formed into a cylindrical shape, and a plurality of character wheels 11 ₁ to 11 ₄ rotatably connected to the outer periphery of the excitation coil by a plurality of shift pinions 12 ₁ to 12 ₃ are rotatably arranged. furthermore, the lowest digit character wheels 4 ₁ and 11 ₁ of the first and second totalizers A and B are rotationally coupled to the permanent magnet rotor 1. A totalizing device.