JPH0716253U - Totalizer - Google Patents

Abstract

(57) [Summary] [Purpose] The numbers attached to the outer peripheral surfaces of multiple digit cars appear in the display window for each digit, and the carry operation of the upper digit is automatically performed.
And in a totalizer with a reset mechanism,
The input torque required to escape from the lockout due to a defective meshing due to the reset operation is small, and even in the case of a mileage totalizer in which the input rotation is given to the totalizer by a stepping motor with a small torque, the totalizing function may be lost Provide not a totalizer. [Constitution] Numeric wheel 13- for carrying up each display digit
Intermittent gears S formed on the upper girder side surfaces 1 to 13-4
Of the two teeth, -1 and S-2, the height of the tooth B'on the side opposite to the normal rotation direction of the numeral wheel is made smaller than the height of the tooth A on the normal rotation side.

Description

[Detailed description of the device] [Industrial applications]

 The present invention relates to a totalizer, and in particular, a plurality of cylindrical numeral wheels having numbers 0 to 9 printed on the outer peripheral surface at equal intervals are rotatable on a common fixed shaft fixed to a case. One of the numbers on the circumference of each number car is displayed as a numerical value for each digit of the accumulated amount through the display window provided on the case. When the character wheel of the lower digit is rotated once according to the input accumulated amount, , Regarding the totalizer having a structure in which the display of the character wheel of the adjacent upper digit is moved up by one unit, especially the improvement of the totalizer with the reset mechanism that can simultaneously reset the display of all digits to 0 at any time. It is about.

[0001]

[Prior art]

 Conventionally, one of the numbers 0 to 9 printed on the outer peripheral surface of a plurality of numbered wheels arranged coaxially appears in the display window provided on the case, and when the lower-order digit wheel makes one revolution, it automatically adjoins. Integrators with a mechanical digital display type that allows the display of the higher-order character wheel to move up by one unit and with a reset mechanism are widely used in vehicle trip meters and the like.

FIG. 6 shows a configuration of a main part in a conventional integrating meter of this type. In the figure, cylindrical numeral wheels 13-1 to 13-4 are independently rotatably arranged side by side on a fixed shaft 12 whose both ends are fixed to a frame 11, respectively. On the outer peripheral surface of No. 4, numerals 0 to 9 are attached as prints 14-1 to 14-4 by printing or the like. For example, through the display windows W-1 to W-4 provided on the dial of the instrument, the above numbers can be displayed. One is configured to appear as the digit of the relevant digit of the integrated amount to be displayed. In the following description, the numeral wheel 13-1 corresponds to the lowest digit of the numerical value of the integrated amount to be displayed, and the numeral wheels 13-2 to 13-4 sequentially correspond to the upper digits.

Driving gears 15-1 to 15-4 having teeth around the entire outer periphery are provided on the side surface of the lower digits of the numeral wheels 13-1 to 13-4, and the numeral wheels 13-1 to 13-3 are provided. Intermittent gears S-1 and S-2 having two teeth on the outer edge are provided on the side surface of the upper girder side. The details of the structure of the intermittent gears S-1 and S-2 will be described with reference to FIG. 8 for the numeral wheel 13-1 of the lowest digit as a representative. The intermittent gear S-1 is the upper digit side of the numeral wheel 13-1. It has a portion of thickness t ₁ from the side surface of and a portion of thickness t ₂ overlaid on it. A portion having a thickness t ₁ is a disk having a circumference T equal to the tip circle of the intermittent gear S-1, and a notch corresponding to a recess P of two teeth is provided at one position on the circumference. . The portion of thickness t ₂ is formed with a tooth profile of two teeth of the intermittent gear S-1, and is arranged so that the concave portion P of the two teeth and the notch on the disk of the circumference T coincide with each other. Has been done.

As shown in FIGS. 6 and 7, there is a rotating shaft 16 whose both ends are fixed to the frame 11 in parallel with the fixed shaft 12, and a support 17 is rotatably provided around the rotating shaft 16. The protrusions 18 are provided at both ends of the supporting body 17 in the longitudinal direction, and the pinion shaft 24 is attached between the protrusions 18 in parallel with the rotating shaft 16. The pinions 20-1 to 20-4 are independently and rotatably arranged side by side on the pinion shaft 24. The structure of the pinions 20-2 to 20-4 will be described with reference to FIG. 7 for the pinion 20-2 as a representative. The pinion 20-2 has a tooth profile in which wide teeth 20a and narrow teeth 20b are alternately arranged. In the drawings in which the tooth profile of the pinion appears, the tooth circle is drawn by a broken line so that the narrow-width tooth 20b can be easily distinguished.

With respect to the above-described integrating meter, the operation of moving up the display of each digit will be described. FIG. 7 typically shows the relative positional relationship between the intermittent gear S-1 and the pinion 20-2 immediately after the reset operation described below is performed for the numeral wheel 13-1 of the lowest digit. The number 0 of -1 appears in a display window W-1 (not shown) in the direction of arrow X. Both the wide-width teeth 20a and the narrow-width teeth 20b of the pinion 20-2 are always meshed with the drive gear 15-2 of the upper digit number wheel 13-2, which is not shown in FIG. The intermittent gear S-1 of the lower digit number wheel 13-1 meshes only once per revolution of the number wheel 13-1 as described below.

When the physical quantity to be integrated into the integrating meter is entered, the numeral wheel 13-1 rotates in the arrow Y direction by the action of the pinion 20-1 described later, and the numerals appearing in the display window W-1 are sequentially displayed. 1, 2, 3, ... And finally, as shown in FIG. 8, the number 9 reaches the position displayed in the display window. During rotation of the numeral wheel 13-1 from the position shown in FIG. 7 to the position shown in FIG. 8, the meshing of the intermittent gear S-1 and the pinion 20-2 does not occur, and the wide teeth 20a of the pinion 20-2 are not generated. Is in contact with the tip circumference T of the intermittent gear S-1, the rotation of the pinion 20-2 is blocked, and therefore the display 14-2 of the upper digit numeral wheel 13-2 does not change.

When the integrated amount is further input, the numeral wheel 13-1 rotates from the position shown in FIG. 8 to the position shown in FIG. 9, but at this time, the front tooth A of the two teeth of the intermittent gear S-1 is changed. The tooth tip of the wide tooth 20a is engaged with the narrow tooth 20b of the pinion 20-2, and at this position, the tooth tip of the wide tooth 20a enters the recess P of the two teeth on the tooth tip circumference T of the intermittent gear S-1. -2 is rotated along with the rotation of the numeral wheel 13-1, and is rotated until the state shown in FIG. 7 is again generated by the rotation of the numeral wheel 13-1.

When the numeral wheel 13-1 rotates from the position shown in FIG. 8 to the position shown in FIG. 9 and again to the position shown in FIG. It changes to 0, and the display 14-2 of the upper digit numeral wheel 13-2 meshing with the rotation of the pinion 20-2 advances by one unit, and the carry operation is completed. Further, with respect to the upper digit digit cars 13-2 to 13-4, the operation of advancing the display of each digit is sequentially performed by the same operation as described above.

Next, the path through which the integrated physical quantity is input will be described. In the embodiment shown in FIG. 6, the tooth profile of the pinion 20-1 that meshes with the drive gear 15-1 of the lowest digit numeral wheel 13-1 has no narrow teeth and is adjacent to the numeral wheel 13-1. The gear 35, which is rotatably attached to the fixed shaft 12, is also constantly meshed. Since the input gear 36 attached to the input shaft 37 of the totalizer meshes with the gear 35, when the integrated physical quantity is given to the input shaft 37 as the rotation speed, the numeral wheel 13-1 rotates. The integrated value corresponding to the input rotation speed is displayed, and the above-mentioned carry operation of the display of each upper digit is carried out one after another.

When the integrated physical quantity is, for example, the traveling distance of an automobile, a method of guiding the rotation of the propeller shaft to the input shaft 37 with a flexible cable is conventionally used for the input rotation. Instead of the method, a rotation sensor that generates an electric pulse signal corresponding to the rotation speed is attached to the propeller shaft, and this electric pulse signal is received by a stepping motor connected to the input shaft 37, and the rotation of the shaft of the stepping motor is input shaft. The method of giving to 37 has come to be used.

In a totalizer used for a trip meter of a vehicle, etc., a reset mechanism is necessary to display all digits at a time to 0 at any time. The reset operation in the embodiment shown in FIG. 6 will be described below. To do. The resetting means forcibly rotating each of the numeral wheels 13-1 to 13-4 to a position where the numeral 0 of the indications 14-1 to 14-4 goes to each of the display windows W-1 to W-4. At this time, since it is necessary for each of the numeral wheels 13-1 to 13-4 to be able to freely rotate on the fixed shaft 12, each of the pinions 20-1 to 20-4 and each of the drive gears for the above-mentioned input and carry-up operation are required. The following mechanism is provided for temporarily releasing the mesh with 15-1 to 15-4.

The panel on which the display windows W-1 to W-4 are arranged is provided with a reset knob (not shown), and when the reset knob is pushed in, a link (not shown), a lever or other known connecting means is provided. Thus, in FIG. 7, the support 17 is configured to rotate clockwise about the rotation shaft 16. As a result, the pinions 20-1 to 20-4 are separated from the drive gears 15-1 to 15-4, and the meshing therebetween is released. When the pushing of the reset knob is stopped, the engagement state shown in FIG. 7 is restored by the return spring (not shown) incorporated in the connecting means such as the link and lever.

When returning to the meshing state shown in FIG. 7 from the reset operation, the square bosses 20c, so that the pinions 20-2 to 20-4 are properly meshed with the respective intermittent gears S-1 and S-2. A detent mechanism including leaf spring pieces 28-1 to 28-3 is provided. As shown in FIG. 7, the square boss 20c is a boss having a quadrangular cross section integrally formed with each of the pinions 20-2 to 20-4, and the leaf spring pieces 28-1 to 28-3 are support members. The elastic pieces 17 are integrally formed and are arranged so as to be elastically pressed against the respective side surfaces of the square pole portion of the square boss 20c of the pinions 20-2 to 20-4.

When the reset knob is pushed and the pinions 20-1 to 20-4 are disengaged from the drive gears 15-1 to 15-4, the squares of the leaf spring pieces 28-1 to 28-3 are squared. By elastic pressure contact with each side surface of the quadratic prism portion of the boss 20c, the rotation angle positioning of the wide teeth 20a and the narrow teeth 20b of the pinions 20-2 to 20-4 is performed, and the state shown in FIG. 7 is obtained from the reset operation. When returning, each pinion 20-2 to 20-4 will be in a correct meshing state with each intermittent gear S-1, S-2.

In order to forcibly rotate each of the numeral wheels 13-1 to 13-4 so that the numeral 0 of the indications 14-1 to 14-4 is directed to the respective display windows W-1 to W-4, Heart cams 31-1 to 31-4 are attached to the surfaces of the numeral wheels 13-1 to 13-4 to which the drive gears 15-1 to 15-4 are attached, as shown by broken lines in FIG. On the other hand, there are reset claws 30-1 to 30-4 integrally formed from the supporting body 17, and when the reset knob is pushed in, the pinions 20-1 to 20-4 become the drive gears 15-1 to 15-4. After the engagement is released, the support body 17 further rotates clockwise around the rotation shaft 16 and the tips of the reset claws 30-1 to 30-4 act on the heart cams 31-1 to 31-4. This is forced to rotate, and the numeral wheels 13-1 to 13-at the positions where the tips of the reset claws 30-1 to 30-4 are engaged with the minimum radius positions of the heart cams 31-1 to 31-4, respectively. 4 is configured to stop. At the stop position, each of the numeral wheels 1 3-1 to 13-4 displays the numeral 0 through the display windows W-1 to W-4, and the reset operation is completed.

[0016]

In the process in which the reset operation is completed and the reset knob is released, the tips of the reset claws 30-1 to 30-4 are first attached to the heart cam 31 due to the operational sequence of the mechanism. -1 to 31-4 Because the pinion 20-1 to 20-4 and the drive gears 15-1 to 15-4 are meshed with each other, the number wheel 13-1 is temporarily moved away from the minimum radius position. There is a period in which the constraint of ~ 13-4 disappears, and during this period, if the numeral wheel shifts from the regular angular position due to vibration or impact from the outside, a defective meshing between the pinion and the intermittent gear occurs.

FIG. 10 typically shows a state in which such a poor meshing occurs between the pinion 20-2 and the intermittent gear S-1 of the numeral wheel 13-1. The difference between the state shown in FIG. 10 and the state shown in FIG. 7 is that the numeral wheel 13-1 is deviated from the regular angular position by a half pitch of the display 14-1 in the angular position opposite to the rotation direction of the arrow Y. The pinion 20-2 and the intermittent gear S -1 mesh with each other. Further, in comparison with the state shown in FIG. 9, the narrow width tooth 20b of the pinion 20-2 meshes with the recess P of the double tooth of the intermittent gear S −1, and the wide width tooth 20a is in the tip tip circumference T. Since they are in contact with each other, the rotation of the pinion 20-2 is blocked, and at the same time, the rotation of the numeral wheel 13-1 is also blocked. That is, when such an incorrect meshing occurs, the totalizer is locked out and cannot operate normally.

If the input shaft 37 is forcibly input with a large torque in the poor meshing state shown in FIG. 10, the numeral wheel 13-1 will also try to follow the narrow wheel 20b of the pinion 20-2. 11 has a tooth tip of a rear tooth B of the two teeth of the intermittent gear S-1 which slides from the meshing position shown by a broken line 20b 'in FIG. The angle around the rotary shaft 16 is increased and pushed up by L. Finally, the mesh of both gears slips by one tooth and settles in the state shown in FIG.

That is, in the poor meshing state, if the input shaft 37 is forcibly input rotated with a large torque, it is possible to escape from the incorrect meshing state and shift to the normal operating state. A very large input torque is required compared to the operating torque, and if the input rotation is forcibly given with such an excessive torque, there is a great risk of damaging the mechanism of the integrator or shortening its life.

A traveling sensor that generates an electric pulse signal corresponding to the number of revolutions is attached to the propeller shaft, and the electric pulse signal is received by a stepping motor attached to the input shaft 37 to rotate the shaft of the stepping motor. In the case of a mileage accumulator that is applied to the input shaft 37, there is a drawback that the output torque of the stepping motor is limited and the lockout state cannot be escaped, and the function as an accumulator is lost. It was

Therefore, in view of the above-mentioned conventional problems, the present invention provides a totalizer that is easy to escape from the lockout state even if the lockout state occurs and is not likely to lose its function. With the goal.

[0022]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the totalizer made by the present invention has a plurality of cylindrical numeral wheels, in which numerals 0 to 9 are provided at equal intervals on each outer peripheral surface, which are rotated on a common fixed shaft. Each numeral wheel is mounted rotatably, and corresponds to each digit of the numerical value of the integrated quantity to be displayed.On the side of the lower digit of each numeral wheel, a drive gear having teeth around the entire outer edge is formed. An intermittent gear having two teeth on its outer edge is formed on the side surface of the upper girder of the vehicle, and a plurality of pinions having teeth in which wide teeth and narrow teeth are alternately arranged are arranged in parallel with the fixed shaft. It is rotatably attached to the pinion shaft, and the drive gear of each number wheel is constantly meshed with the corresponding pinion, and the wide teeth of the pinion have reached the predetermined rotation position after one rotation of the adjacent lower digit number wheel. Sometimes, by engaging with the intermittent gear of the lower digit, The rotation of the numeral wheel is intermittently transmitted to the numeral wheel of the upper digit to carry each digit of the numerical value of the integrated amount to be displayed, and the meshing between the numeral wheel and the pinion is disengaged. In a totalizer that has a reset mechanism that simultaneously displays all digits at any time to 0 at any time, of the two teeth of the intermittent gear, the height of the tooth on the side opposite to the normal rotation direction of the numeral wheel is positively rotated. The feature is that it is smaller than the height of the teeth on the side.

[0023]

[Action]

 According to the above configuration, among the two teeth of the intermittent gear, the height of the tooth on the side opposite to the normal rotation direction of the numeral wheel is set to be smaller than the height of the tooth on the normal rotation side. When input rotation is continuously applied to the integrator that is in the state, the mesh between the pinion and the intermittent gear slips by one tooth, and the extra input torque required to escape from the lockout state is small. , It is easy to escape from the lockout state and there is no risk of loss of function.

[0024]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a relative positional relationship between the intermittent gear S-1 and the pinion 20-2, which is typically the lowest digit of the numeral wheel 13-1, in the state immediately after the reset operation in one embodiment of the present invention. Indicates. In the figure, members having the same functions as those in the conventional technique are denoted by the same reference numerals, and repeated description is omitted. In the present invention, as typically shown in FIG. 1, the tooth height of the rear tooth B'of the two teeth of the intermittent gears S-1 and S-2 is made smaller than the tooth height of the front tooth A. ing.

When the physical quantity to be integrated is input to the integrator, the numeral wheel 13-1 rotates in the direction of the arrow Y, and the numerals appearing in the display window W-1 sequentially advance to 1, 2, 3 ... 2. Rotate through the states shown in FIG. 3 and again to the state shown in FIG. While the numeral wheel 13-1 rotates from the position shown in FIG. 2 to the position shown in FIG. 3 and again to the position shown in FIG. 1, the number of the display 14-1 appearing in the display window W-1 changes from 9 to 0, The display 14-2 of the upper digit numeral wheel 13-2 meshing with the rotation of the pinion 20-2 advances by one unit, and the carry operation is completed. Further, with respect to the upper digit digit wheels 13-2 to 13-4, the operation of advancing the display of each digit is sequentially performed by the same operation as described above.

The mechanism and operation for resetting the display of the integrating meter according to the present invention are the same as in the prior art, and when the reset operation is completed and the reset knob is released, a number is received due to external vibration or shock. If the vehicle deviates from the normal angular position, a bad mesh between the pinion and the intermittent gear will occur. FIG. 4 typically shows a state in which such an incorrect meshing occurs between the pinion 20-2 and the intermittent gear S-1 of the numeral wheel 13-1. In the state of FIG. 4, the narrow tooth 20b of the pinion 20-2 meshes with the recess P of the two teeth of the intermittent gear S-1, and the wide tooth 20a is in contact with the tip circumference T, so that the pinion The rotation of 20-2 is blocked, and at the same time, the rotation of the numeral wheel 13-1 is blocked, and the lockout state is set.

Here, when input rotation is continuously applied to the input shaft 37, the numeral wheel 13-1 also tries to rotate following the input wheel 37, and as shown in FIG. 5, the tips of the narrow teeth 20b of the pinion 20-2 are It rides on the rear tooth B'of the intermittent gear S-1 and pushes the pinion shaft 24 against the reset return spring to an angle around the rotary shaft 16 and pushes it up by M, and finally the meshing of both gears is one tooth. Slip to settle in the state shown in Fig. 1 and escape from the lockout state.

When escaping from the lockout state, the height of the rear tooth B ′ of the intermittent gear S-1 is smaller than the height of the front tooth A in the present invention as shown in FIG. Therefore, when the tip of the narrow tooth 20b of the pinion 20-2 rides on the rear tooth B ', the angle M of pushing up the pinion shaft 24 around the rotation shaft 16 against the reset return spring is increased. 5 is smaller than the push-up angle L in the conventional example shown by the broken line 20b ″ in FIG. 5, and the reaction torque received by the numeral wheel 13-1 is correspondingly small. Therefore, the extra input torque to be applied to the input shaft 37 required to escape from the lockout state can be small.

In the present invention, the height of the tooth of the rear tooth B ′ of the intermittent gear S-1 should be smaller from the viewpoint of escape from the lockout state, but on the other hand, the advance operation of the integrated amount display is described. In the process of rotating the numeral wheel 13-1 from the position shown in FIG. 3 to the position shown in FIG. 1 again, it is necessary to mesh the narrow tooth 20b of the pinion 20-2 and the rear tooth B'of the intermittent gear S-1. is there. That is, the height of the rear tooth B'of the two teeth of each intermittent gear S-1 and S-2 is limited to the extent that the meshing with the narrow teeth 20b of the pinions 20-2 to 20-4 is not impaired. The key point of the present invention is to make the structure as small as possible.

[0030]

[Effect of device]

 As described above, according to the present invention, when input rotation is continuously applied to the badly meshed totalizer, one tooth slips between the pinion and the intermittent gear, causing a lockout. The extra input torque required to get out of the state is small. Therefore, there is no danger that excessive input torque will be applied to the input shaft, damaging the mechanism of the totalizer or reducing its life.

In addition, in the case of a mileage accumulator of the type in which the rotation of the shaft of the stepping motor that operates by the electric pulse signal corresponding to the rotation speed of the propeller shaft is applied to the input shaft of the accumulator, the output of the stepping motor is output. There is no risk of losing the function of the totalizer by escaping from the lockout state of the totalizer with the torque.

[Brief description of drawings]

FIG. 1 is a side view (a) and a front view (b) of a partial detail showing a state of normal meshing immediately after resetting an integrating meter according to the present invention.

FIG. 2 is a side view (a) and a front view (b) of a partial detail showing a state of meshing just before moving up an integrating meter according to the present invention
Is.

FIG. 3 is a partial detailed view showing a meshing state in the middle of the raising operation of the integrating meter according to the present invention.

FIG. 4 is a partial detailed view showing a state of defective meshing immediately after resetting of the integrating meter according to the present invention.

FIG. 5 is a partial detailed view showing a state in which the integrating meter according to the present invention is returning from a defective mesh to a normal mesh.

FIG. 6 is a perspective view showing a main part configuration of a conventional integrating meter.

FIG. 7 is a side view (a) and a front view (b) of partial details showing a state of normal meshing immediately after resetting of a conventional integrating meter.
Is.

FIG. 8 is a side view (a) and a front view (b) of a partial detail showing a meshing state immediately before the conventional integrating meter is moved up.

FIG. 9 is a partial detailed view showing a meshing state in the course of a raising operation of a conventional integrating meter.

FIG. 10 is a partial detailed view showing a state of defective meshing immediately after resetting of a conventional integrating meter.

FIG. 11 is a partial detailed view showing a state where the conventional integrating meter is in the process of returning from defective meshing to normal meshing.

[Explanation of symbols]

 12 Fixed shaft 13-1 to 13-4 Numeric wheel 14-1 to 14-4 Display 15-1 to 15-4 Drive gear S-1, S-2 Intermittent gear 20-1 to 20-4 Pinion 20a Wide tooth 20b Narrow tooth 24 Pinion shaft A Two-tooth front tooth B, B'Two-tooth rear tooth

Claims (1)

[Scope of utility model registration request] 1. A plurality of cylindrical numeral wheels having numbers 0 to 9 attached to each outer peripheral surface at equal intervals are rotatably mounted on a common fixed shaft, and each numeral wheel should be displayed. A drive gear having teeth on the outer circumference of the lower digit side of each numeral wheel is formed corresponding to each digit of the accumulated quantity, and two teeth are provided on the outer edge of the upper digit side surface of each numeral wheel. A plurality of pinions each having an intermittent gear formed and having teeth with wide and narrow teeth alternately arranged are rotatably attached to a pinion shaft arranged in parallel with the fixed shaft, and each number wheel Drive gears of the pinion always meshes with the corresponding pinion, and the wide teeth of the pinion mesh with the intermittent gears of the lower digit of the lower digit when the adjacent lower digit of the digit wheel makes one rotation to reach a predetermined rotation position. Allows the rotation of the lower digit vehicle to be intermittently transmitted to the upper digit vehicle. The reset mechanism is configured to carry each digit of the numerical value of the integrated amount to be displayed and to disengage the meshing between the numeral wheel and the pinion to simultaneously display all digits to 0 at any time. In the totalizer having, the height of the tooth on the side opposite to the forward rotation direction of the numeral wheel of the two teeth of the intermittent gear is smaller than the height of the tooth on the forward rotation direction side. Totalizer. [0001]