JPS6032058B2 - intermittent drive device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an intermittent drive device for converting continuous rotary motion into special rotary motion such as intermittent rotary motion or reciprocating rotary motion.

Note that in this specification, the term "special rotational motion" is used to include intermittent rotational motion in one direction, swinging rotational motion, and rotational motion that is a combination of these. Generally, an intermittent drive device is configured as a device that converts continuous rotational movement of an input shaft into intermittent rotational movement of an output shaft in one direction. However, the intermittent drive may be configured as an oscillating rotation drive that converts continuous rotation of the input shaft into oscillating rotation of the output shaft, and depending on the application, the output shaft may have oscillating rotation or unidirectional rotation. In some cases, a rotation that is a rough combination of intermittent rotation and . In order to include all such rotational movements, the term "special rotational movement" is used in this specification. In general, an intermittent drive device includes an input shaft connected to a drive device such as a motor, and an output shaft connected to a driven body such as a turntable or conveyor, and the continuous rotational movement of the input shaft is transferred to a transmission cam device. The structure is such that the rotational movement is converted into intermittent rotational movement or reciprocating rotational movement, and the converted movement is transmitted to the driven body via the output shaft.

However, the above. In the intermittent drive device that converts the continuous rotational movement of the input ball into a special rotational movement of the output shaft,
During operation, the torque acting on the output shaft constantly fluctuates, and the reaction force of that torque acts on the input shaft as fluctuating torque. The fluctuating torque acting on the input shaft becomes particularly large during high-speed operation, which prevents uniform rotation of the input shaft and causes vibrations during operation and associated operational errors. SUMMARY OF THE INVENTION In view of the above-mentioned current situation, an object of the present invention is to provide an intermittent drive device that is configured to remove fluctuating torque acting on an input shaft during operation, thereby enabling high-speed and high-precision operation. It is something.

That is, the intermittent drive device of the present invention is provided with a torque compensating cam device in which a torque compensating three-dimensional cam, which is a main driving part, is attached to an input shaft, and a torque compensating turret, which is a driven part, is connected to an inertial mass body. The variable torque acting on the input ball when converting the motion of the input shaft into the motion of the output shaft via the transmission cam device is offset by the variable torque applied to the input shaft by the operation of the torque compensation cam device. It is characterized by the fact that

The present invention will be explained below with reference to the accompanying drawings. First, FIGS. 1 to 3 show a first embodiment of the present invention.

The intermittent drive device A of the first embodiment is configured as a device for converting continuous rotational motion of an input shaft 1 into intermittent rotational motion of an output shaft 2, and 3 and 14 are a transmission cam device and A torque compensating cam arrangement is shown. As clearly shown in FIGS. 1 and 3, the transmission cam device 3 and the torque compensating cam device 14 are arranged spaced apart from each other in the direction of the axis 1' of the input shaft 1. The driving member of the transmission cam device 3 is composed of a three-dimensional cam 4 mounted on the input shaft 1, while the follower member is a turret having a plurality of cam followers 5 protruding from the periphery that sequentially engage the three-dimensional cam 4. 6
The output shaft 2 is iron-bonded to the center of the turret 6. Further, the main driving member and the secondary member of the torque compensating cam device 14 each include a three-dimensional cam 15 for torque compensation which is iron-bonded to the input shaft 1, and a plurality of cam followers 16 that sequentially engage with the three-dimensional cam 15. It consists of a torque compensating turret 17 that projects from the periphery and is connected to a shaft 18 at the center, and the shaft 18 is connected to a load body, that is, an inertial mass body 19. In the illustrated embodiment, the three-dimensional cam 4 of the transmission cam device 3 and the three-dimensional cam 15 of the torque compensation cam device 14 are globoidal cams, but it is also possible to use barrel cams, cylindrical cams, or the like.

In addition, in FIGS. 1 and 2, 7 is an intermittent drive device A.
8 to 13 indicate bearings.
The above-mentioned intermittent drive device continuously rotates the input shaft 1 and the three-dimensional cam 4 of the transmission cam device 3 that is integrally connected to the input shaft 1 by a drive device (not shown) such as a motor. The engagement between the cam 4 and the cam follower 5 converts the turret 6 and the output shaft 2 connected thereto into intermittent rotational motion, which is transmitted to a driven body (not shown) such as a turntable or conveyor. It has become.

Further, as the input shaft 1 rotates, the three-dimensional cam 15 of the torque compensation cam device 14, which is integrally iron-bonded to the input shaft 1, rotates continuously, and this rotation causes the three-dimensional cam 15 and the cam follower 16 to rotate. The engagement converts the turret 17 and the inertial mass body 19 connected thereto into intermittent rotational motion. Therefore, by operating the torque compensating cam device 14 in this way and rotating the inertial mass body 13 intermittently,
This prevents any fluctuating torque from acting on the input koji 1 when the intermittent drive device A operates. That is, when converting the continuous rotational movement of the input shaft 1 into intermittent rotational movement of the output shaft 2 via the transmission cam device 3 as described above and transmitting the movement of the output shaft 2 to the driven body, the The load, or torque, acting on the output shaft 2 constantly fluctuates due to the frictional resistance of the motor and the inertia of the driven body, etc., and the reaction force of the torque acts on the input shaft 1 as a fluctuating torque.

When a variable torque acts on the input shaft 1 in this manner, uniform rotation of the input shaft 1 is hindered, and this becomes a cause of vibrations and operational errors of the intermittent drive device. Therefore, in the present invention, the fluctuating torque applied to the input ball 1 as described above is a reaction force of the torque applied to the shaft 18 when the inertial mass body 19 is intermittently rotated by the operation of the torque compensation cam device 14. This is offset by the fluctuating torque applied to the input shaft 1 as a result, so that the fluctuating torque does not substantially act on the input shaft 1. When designing the intermittent drive device A, the variable torque Q, which is applied to the input shaft 1 when the driven body is intermittently driven via the transmission cam device 3,
If the configuration of each part of the intermittent drive device is determined so that the sum with the fluctuating torque Q2 applied to the input shaft 1 when the inertial mass body 19 is intermittently rotated via the torque compensation cam device 14 becomes 0. It's good.

Calculating the fluctuating torque that acts on the input shaft during the operation of a device that uses a cam, such as a follower intermittent drive, is widely practiced, and as described above, the sum of fluctuating torques Q and Q2 is set to zero. It is easy for those skilled in the art to determine the configuration of each part of the device given the following conditions. To briefly explain how to determine them, first, the fluctuating torques Q and Q2 are calculated as follows, assuming that these fluctuating torques are caused only by the load mass of the driven body and the inertial mass body 19, respectively. It is expressed by the formula. Equations '11 and (2) above are similar to well-known formulas for calculating the fluctuating torque acting on the input shaft during operation of the intermittent drive.

Therefore, a detailed explanation of the formulas [11 and (211) will be omitted, and the physical meaning of each parameter used in the formulas will be briefly explained as follows.A, and V
, :Dimensionless acceleration and dimensionless speed m, and V2 of the turret 6 of the transmission cam device 3, and V2:Dimensionless acceleration and dimensionless speed m, and m of the turret 17 of the torque compensation cam device 14.
2: Load mass t of each of the driven body and inertial mass body:
Time required for one revolution of the input shaft y, and y2: Rotation angle 8 of each of the output shaft 2 and shaft 18 during one revolution of the input shaft: Time during which the output shaft performs rotational movement during one revolution of the input shaft Ratio of the time required for one rotation of the input shaft 02: Ratio of the time required for the rotation of the shaft 18 during one rotation of the input shaft to the time required for one rotation of the input shaft When designing the intermittent drive device A, first input malt 1 The rotational speed of the output shaft 2, the motion type of the output shaft 2, the configuration of the transmission cam device 3, etc. are determined according to the type and load mass of the driven body to be connected to the device A, in the same manner as in the case of conventional intermittent drive devices. Determine.

Therefore, when the above determination is made, it becomes possible to calculate the numerical values of each parameter used in the above equation {1. Next, in the above equations '1} and '21, the fluctuating torque Q,
The configuration of the torque compensating cam device 14 and the inertial mass body 19 is determined so that the sum of Q2 and Q2 becomes zero. That is, in order to make the sum of the fluctuating torques Q and Q2 0 in the above equations '1} and (2), the following equation holds true. Here, the three-dimensional cam 4 of the transmission cam device 3 and the three-dimensional cam 15 of the torque compensation cam device 14 are mounted next to the same input shaft 1 and rotate together with the input shaft, and as described above, the three-dimensional cam 4 of the torque compensation cam device 14 is Considering conditions such as the fact that the shaft 18 must also rotate when the output ball 2 rotates in order to offset the applied fluctuating torque, 0 and Y become equal to 02 and the gunwale, respectively.

Therefore, the above equation '3- can be simplified as the following equation '4}. A.. V,. m, = A2・V2・m2
… '4} However, in formula '4',
Since V and m are already known, for example, by setting the value of m2 to an appropriate value, it is possible to determine V2, which is the integral value thereof.

The configurations of the torque compensating cam device 14 and the inertial mass body 19 can be designed based on A2, V2, and m2 determined in this way. 4 and 5 show a second embodiment of the present invention. The intermittent drive device B of the second embodiment has the arrangement of the torque compensating cam device of the first embodiment changed, and the other configurations are the same as those of the first embodiment. That is, in the first embodiment, the turret 17 of the torque compensating cam device 14 is provided on the same plane as the turret 6 of the transmission cam device 3, and the output shaft 2 and the shaft 18 are arranged parallel to each other in the same direction. It is a growing array. On the other hand, in the second embodiment, the turret 17' of the torque compensating cam device 14' is provided in a plane substantially orthogonal to the turret 6' of the transmission cam device 3', and the output shaft 2' and the inertia Shafts 18' connected to the masses 19' extend substantially perpendicular to each other. Generally axis 1
Although the extending direction of the inertial mass body 19' and the position of the inertial mass body 19' are limited depending on the shape of the space when connecting the intermittent drive device to the driven body, etc., as in the second embodiment, If the diameter of the inertial mass body 19' is increased, it will not hit the output shaft 2', and the housing 7
This provides advantages such as reducing the horizontal center of '. As described above, since the intermittent drive device of the present invention can remove the fluctuating torque that acts on the input shaft during operation, it has the advantage of preventing the vibration of the device during high-speed operation and the occurrence of operational errors associated with it, and is extremely effective. It is effective for

[Brief explanation of the drawing]

FIG. 1 is a partially sectional front view showing an intermittent drive device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line 1-1 of FIG. 1, and FIG. A perspective explanatory view showing the arrangement with the torque compensation cam device, FIG. 4 is the second embodiment of the present invention.
FIG. 5 is a partially sectional front view showing the intermittent drive device of the embodiment, and FIG. 5 is a sectional view taken along the line V-V in FIG. 4. 1...Input shaft, 2,2'...Output shaft,
3, 3'... Transmission cam device, 4, 15...
...3D cam, 5, 16... Force muffler, 6, 6',
17, 17'... Turret, 18, 18'... Shaft, 1
9,19'...Inertial mass body. -Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Scope of Claims] 1. A three-dimensional cam fitted onto an input shaft, a turret having a plurality of cam followers protruding from the periphery that engages with the three-dimensional cam, and fitted onto the output shaft at the center. In the intermittent drive device, the intermittent drive device is equipped with a transmission cam device that converts the continuous rotational motion of the input shaft through the three-dimensional cam into a special rotational motion of the turret, and extracts this from the output shaft. A torque compensating turret having a fitted torque compensating three-dimensional cam, a plurality of cam followers protruding from the periphery that engage with the torque compensating three-dimensional cam, and a connecting shaft fitted in the center; A torque compensating cam device having an inertial mass body provided on the connecting shaft is provided, and acts on the input shaft when the continuous rotational movement of the input shaft is converted into a special rotational movement of the output shaft by the transmission cam device. An intermittent drive device characterized in that the fluctuating torque applied to the input shaft is offset by the fluctuating torque applied to the input shaft when rotating the inertial mass body via the torque compensating three-dimensional cam and the torque compensating turret. . 2. In the intermittent drive device according to claim 1, the turret of the transmission cam device and the torque compensation turret are provided on the same plane, and the output shaft and the connecting shaft are parallel to each other and move in the same direction. An intermittent drive device configured to extend. 3. In the intermittent drive device according to claim 1, the turret of the transmission cam device and the torque compensating turret are provided on planes that are substantially orthogonal to each other, and are substantially perpendicular to the direction in which the output shaft extends. An intermittent drive device configured such that the connecting shaft extends in a perpendicular direction.