JPS63308265A - Precision driving mechanism by gear transmission - Google Patents

Abstract

PURPOSE:To eliminate backlash by connecting a pinion meshed with a bull gear load side and a transmission roller adapted to transmit torque to a friction annular element on bull gear side when a clutch is on the output shaft side of gear reducing means. CONSTITUTION:A pinion 9 and a transmission roller 14 are connected to an output shaft 7 of reducing gear means 5, the pinion 9 is meshed with a bull gear 1 of a load shaft 2, and the transmission roller 14 is brought into contact with a friction annular element 11 provided on the bull gear 1. A clutch 13 is provided on the hollow second output shaft 12 of the transmission roller 14. In this case, the reduction gear ratio of the pinion 9 to the bull gear 21 is made equal to the reduction gear ration of the transmission roller 14 to the friction annular element 11. Only at the time of precision positioning rotation near stopping, the clutch 13 is connected to add torque transmission of the transmission roller 14, so that backlash can be eliminated. Thus, accurate positioning stop can be accomplished.

Description

[Detailed description of the invention] [Before industrial use] This invention includes rotary snowmaking using a separate antenna.

Sentoku Mushiyoku I4 using Dashi conduction for precision positioning drive
Regarding the structure, especially the load +! +11 Gear related to improvements to prevent hooking.

[Conventional technology]

FIG. 6 is a configuration diagram showing a conventional precision drive mechanism. IV
i A pull gear fixed to the load shaft 2 and driven to rotate; 3;
, 4Vi, a pair of electric motors, 5 is a first gear reduction means that reduces the rotation of the electric motor 3 using a plurality of reduction gear pairs and transmits the same to the output shaft 7, 6 refers to a turtle 5, and a plurality of reduction gears that reduce the rotation of the motion camera 4. a second gear deceleration means that decelerates and transmits the deceleration to the output shaft by a pair of gears;
9Vi is a first pinion fixed to the output shaft 7Ilc and transmits deceleration rotation to the pull gear 1; 10 is a second pinion fixed to the output shaft 8 and transmits deceleration rotation to the pull gear l.

First and second pinions 8 meshed with the pull gear 1
and 10 parts are shown in plan view in FIG.

Next, the operation will be explained. The rotation of the electric motor 30 generates torque Tl at the pinion 9 via the first gear reduction means 5, and the rotation of the electric motor 30 generates torque T2 at the pinion 10 via the second gear reduction means 6. These torses are given with opposite polarities to each other, and the torque T3 of h T1 "2 becomes the load driving torque. The given torque T
Since I and T2 are of opposite polarity, the gear reduction means 5.6. Pinion 9, 10. j (The backlash in the load pull gear 1 is canceled out because the tooth surfaces are pressed against mutually opposite surfaces and driven.

[Problem that the invention seeks to solve]

Vi, electric motor with conventional precision drive mechanism as above.

There was a problem in that two systems of gear reduction means were required, making the device large and expensive.

The present invention has been made to solve this problem, and aims to provide a precision drive mechanism using gear transmission with a single system of gear reduction means and reduced backlash.

[Means for solving problems]

The precision drive mechanism according to the present invention combines a pinion and a transmission roller on the output shaft side of a gear reduction means.

A pinion is engaged with the pull gear on the load side, a transmission loaf is brought into contact with a friction annular body provided on the pull gear side, and a clutch is provided in the output field system of the transmission loop.

[Effect]

In this invention, during high-speed and wide-range snow movement, the pull gear is rotated only by the pinion, and when rotating for precise positioning near a stop, torque is transmitted by the friction force with the friction annular body using the transmission loop, thereby reducing backlash. This enables precise driving with good reproducibility.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of a precision drive machine according to the present invention. 11 is a pull gear 1 fixed to the load shaft 2
A friction annular body formed integrally with the same axis on the side of the
A friction contact surface 11a is formed on the outer circumference. Electric motor 3
A pinion 9 is fixed to the output shaft 7 of the gear reduction means 5, which transmits the rotation by decelerating the rotation, and transmits the torque of the deceleration rotation to the pull gear 1. A hollow second output shaft is fixed to the gear on the output side of the gear reduction means 5, and has an output shaft 7 in the hollow part, and a clutch 13 is provided in the middle. Reference numeral 14 denotes a transmission roller fixed to the shaft end of the output shaft 12, which is made of a rubber-like elastic material having a large coefficient of friction, and is in contact with the friction contact surface 11a of the friction annular body 11 to transmit the rotation. The gear reduction ratio of the pinion 9 and the pull gear 1 is equal to the reduction ratio of the transmission roller 14 and the friction annular body 11.

Pinion 9 and friction annular body 1 connected to the pull gear l
FIGS. 2 and 3 show the transmission roller 14 in pressure contact with the transmission roller 1 in plan and front views. The operation of the apparatus of the above embodiment is as follows.

When widening the drive range and performing open-loop accurate positioning, the rotation angle of the vjL motive may be controlled and driven, but in such a case, pack lash in the drive gear mechanism becomes a problem.

In particular, the pinion 9 at the final stage and the load side pull gear 1 have a dominant part crush, and in order to eliminate this, the transmission roller 1
4, and a friction annular body 11 is provided on the pull gear 1 side, and the transmission roller 14 is in royal contact with the dark friction contact surface 11a of the pull gear 1, so that the transmission roller 14 can be driven by friction.

When driving over a wide range, the clutch 13 shown in FIG. 1 is released and the normal pinion 9 is used for electric power. When it is rotated to a predetermined position, the clutch 13 is engaged and the contact friction of the transmission loaf 14 with the friction contact surface 11a applies torque transmission through the friction annular body 11.

As a result, even if there is a bump between the pinion 9 and the pull gear 1, the torque transmission by the transmission lobe 14 allows the motor to be precisely driven to a predetermined stop position without the bump.

Gear reduction ratio of pinion 9 and pull gear, and transmission roller 1
Since o and the reduction ratio of the annular body 11 are set equal,
There is basically no problem even if the pinion 9 and transmission roller 10 are rotated simultaneously. Even if there is a case where excessive torque is generated from the pinion 9 side to the transmission roller 10 side for some reason.

By appropriately setting the friction torque of the clutch 13, there is no problem caused by the transmission roller 14 slipping. Note that by setting this reduction ratio as low as possible, the influence of the load on the gear reduction means 5 can be reduced.

FIG. 4 shows another embodiment of the invention. Gear reduction means 5
A pinion 7 is fixed to the middle of the output shaft 7, and a second output shaft 15 is connected to the end of the output shaft 7 via a clutch 13. A transmission loaf 14 is fixed to this output shaft 15 and brought into contact with the friction annular body 11.

FIG. 5 shows different implementations of this pool of light.

The intermediate portions of the plurality of reduction gear pairs of the gear reduction means 16 are branched in parallel into two output systems via the clutches 13, respectively. A pinion 9 is fixed to the output shaft 7 of one output shaft system and meshes with the pull gear 1. A transmission roller 14 is fixed to the output 4i1b17 of the other output shaft system, and is in contact with the friction annular body 11. During high-speed or wide range oscillations, only the clutch 13 of one output shaft system should be engaged.
The rotation is transmitted to the pull gear 1 by the pinion 9. When approaching the stop position, the clutch 13 gold holder of the other output shaft system,
One clutch 13 is disengaged, and the rotation is transmitted by the transmission roller 14.

〔Effect of the invention〕

As described above, according to the present invention, the pinion and the transmission lobe are coupled to the output shaft side of the gear reduction means.

A pinion is engaged with the pull gear on the load side, a transmission roller is brought into contact with a friction annular body provided on the pull gear side, and a clutch is installed on the output shaft system of the transmission loaf. Only when rotating for precision positioning near a stop, the clutch is engaged and the transmission loaf is rotated. Since the torque transmission is applied by adding the torque transmission, it is possible to prevent backlash, accurately position and stop, and the deceleration drive mechanism is simple and inexpensive.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a precision drive mechanism using gear transmission according to the present invention, and FIGS. The front view, FIGS. 4 and 5 are configuration diagrams showing a precision part @ dark beak according to other different embodiments of the present invention, FIG. 6 is a configuration diagram of a conventional precision part @ mechanism, and FIG. FIG. 7 is a front view showing the pull gear and first and second pinion parts of FIG. 6; 1...Pull gear, 2...Load shaft, 3...Electric motor,
5... Gear reduction means, 7... Output shaft, 9... Pinion, 11... Friction annular body, 12... Hollow second output shaft, 13... Clutch %14...・Transmission roller,
15... Second output shaft, 16... Gear reduction means, 1
7...Second output shaft. Note that the same reference numerals in each figure indicate the same or corresponding parts. Figure 1 Up to 14 Figure 2 Figure 3 Procedural amendment (voluntary) 1゜Indication of incident Patent application No. 141880/1988 2
, 511UI (7) Name: Precision drive barrel by tM vehicle transmission 3, Person making the amendment Representative: Shi 1, Mamoruya 4, Agent 5: Name of the invention in the specification to be amended, scope of claims, and description of the invention Detailed explanation and brief explanation of drawings column 6, contents of amendment (1) The name of the invention in the specification
Correct hn to "III Mechanism". (2) Amend the claims of the specification as shown in the attached sheet. (3) Correct "gear transmission" in line 17 of page 2, line 10 of page 4, and line 7 of page 9 to "tooth 1'lT transmission." Scope of Patent No. 11 (1) In a drive mechanism in which a pinion fixed to the output shaft of a gear reduction means connected to a TUJ machine is engaged with a pull gear on the load side to transmit deceleration rotation, A friction annular body provided at the center of the same shaft and coupled to the output shaft system of the gear reduction mechanism via a clutch,
A transmission roller is provided in contact with the outer circumferential surface of the friction annular body, and when the load side is driven at high speed or over a wide range, the clutch is released and the rotation is transmitted by the pinion;
A precision unit using a gear transmission, characterized by the fact that when driving for positioning near a stop, the clutch is engaged and rotation is transmitted by the transmission roller! [111 Organization. The second Precision drive 81 structure using gear transmission according to claim 1, wherein a transmission roller is fixed to the end of the output shaft. (3) The output shaft has a pinion fixed in the middle, and a second output shaft is connected to the shaft end via a clutch.
Claim 1, in which the transmission roller is fixed to the output shaft end of the
Precision drive mechanism by Isao, the gear transmission described in the section. (4) The reduction gear means is an intermediate part of the reduction gear group, and is branched in parallel to the first and second output systems via clutches, and has a pinion connected to the output shaft of the first output system, and is connected to the output shaft of the first output system. A precision drive mechanism using gear transmission according to claim 1, wherein a transmission roller is fixed to the output shaft of the second output system.

Claims (4)

[Claims] (1) In a drive mechanism in which a pinion fixed to the output shaft of a gear reduction means connected to an electric motor is engaged with a pull gear on the load side to transmit deceleration rotation, friction provided on the same axis center on the pull gear side. an annular body, and a transmission roller coupled to an output shaft system of the gear reduction mechanism via a clutch and in contact with an outer circumferential surface of the friction annular body,
When the load side is driven at high speed or over a wide range, the clutch is opened and rotation is transmitted by the pinion, and when driving for positioning near a stop, the clutch is engaged and rotation is transmitted by the transmission roller. Precision drive mechanism using gear transmission. The second A precision drive mechanism using gear transmission according to claim 1, wherein a transmission roller is fixed to the end of the output shaft. (3) The output shaft has a pinion fixed in the middle, and a second output shaft is connected to the shaft end via a clutch.
Claim 1, in which the transmission roller is fixed to the output shaft end of the
Precision drive mechanism using gear transmission as described in section. (4) The reduction gear means is an intermediate part of the reduction gear group, and is branched in parallel to the first and second output systems via clutches, and has a pinion connected to the output shaft of the first output system, and is connected to the output shaft of the first output system. A precision drive mechanism using gear transmission according to claim 1, wherein a transmission roller is fixed to the output shaft of the second output system.