JP3217060U - Micro reducer - Google Patents

Abstract

The present invention provides a micro reduction gear which can realize a large reduction ratio only by a single stage, has a high meshing rate, has high impact resistance, is not easily damaged, and has low noise. An input side bearing 1, a housing 2, an output shaft 3, a slider 4, a cycloid gear 5, a cycloid gear bearing 6, an input shaft 7, an input side bearing 8, a pulley 9, a mounting plate 10, a pin 11, and a screw 12 are provided. The input side bearing 8 is mounted between the input shaft 7 and the housing 2, the output side bearing 1 is mounted between the output shaft 2 and the housing, and the cycloid gear bearing 6 is disposed between the cycloid gear 5 and the input shaft 7. The pulley 9 is attached to the input shaft 7, the input shaft 7 is an eccentric shaft, the cycloid gear 5 rotates coaxially with the eccentric portion of the input shaft 7, and the input shaft 7 is coaxial with the housing 2. [Selection] Figure 1

Description

The present invention belongs to the field of mechanical transmission, and specifically relates to a micro reducer.

At present, the development of intelligent robots is increasing in speed, and usually a reduction gear is required for the rotary joint. However, in the conventional reduction gear structure, it is common to reduce the speed by meshing the gears. Since the volume of the structure is small, the gears are also made small, so the overall strength is low and there is a risk of damage if subjected to an impact. In addition, the conventional planetary gear structure and gear reduction structure are spatially limited, and the single-stage reduction ratio is small, and if it is desired to increase the reduction ratio, the multi-stage reduction is performed. Because of the transmission by meshing, the noise becomes very large at high speed.

The technical problem to be solved by the present invention is that a large reduction ratio can be realized with only a single stage, designed using the transmission principle of the cycloid pin gear, a high meshing rate, high impact resistance, and damage It is to provide a low noise and low noise, and reliably solve the disadvantages of the conventional design.

The present invention is realized by the following technical solution. A micro reducer comprising an input side bearing, a housing, an output shaft, a slider, a cycloid gear, a cycloid gear bearing, an input shaft, an input side bearing, a pulley, a mounting plate, a pin, and a screw. It is mounted between the housing, the output side bearing is mounted between the output shaft and the housing, the cycloid gear bearing is mounted between the cycloid gear and the input shaft, the pulley is mounted on the input shaft, and the input shaft is an eccentric shaft. The cycloid gear rotates coaxially with the eccentric part of the input shaft, the input shaft is coaxial with the housing, the input side bearing is mounted between the input shaft and the housing, and the output shaft rotates coaxially with the housing. An output side bearing is attached between the two.

As a preferred technical solution, a single-stage cycloid pin gear reduction mechanism is configured by the input shaft, the cycloid gear, the housing, and the pin.

As a preferred technical solution, the number of the cycloid gears is one, two, or three.

As a preferred technical solution, the slider has a cross structure, which is engaged with a cycloid gear and an output shaft to form a linear motion pair, and both movement directions are cross-shaped.

As a preferred technical solution, the input shaft is driven by attaching a pulley and using belt transmission as a power input, using a gear, or directly connected to a motor.

As a preferred technical solution, the input shaft is coaxial with the output shaft, the input output is reversible, and an acceleration mechanism is provided when the output shaft is used as an input end.

As a preferred technical solution, the notch of the cycloid gear engages with the boss of the slider to form a sliding pair, and the notch of the slider engages with the boss of the output shaft to form a sliding pair. The sliding directions are perpendicular to each other and have a cross shape.

The beneficial effects of the present invention are as follows. The present invention uses the cycloid pin gear reduction principle to realize the advantages of a large reduction ratio in a single stage, low noise, and high impact resistance, and the micro reduction gear having such a structure is Compared to gear reducers of the same volume, there are significant advantages in performance.

In order to more clearly describe the technical solutions in the embodiments of the present invention or in the prior art, the drawings necessary for the description of the embodiments or the prior art will be briefly described below. These are only a part of the embodiments, and those skilled in the art will be able to conceive other drawings based on these drawings without the need for creative efforts.
It is a typical structure exploded view of the present invention. It is a main structure schematic diagram of this invention. It is a schematic diagram of the cycloid pin gear structure of the present invention. 1 is an overall schematic diagram of the present invention. It is a schematic diagram of the belt input system of this invention. It is a schematic diagram of the gear input system of the present invention. It is a schematic diagram of the direct connection input method of this invention.

All features disclosed in this specification, or all disclosed method or process steps, may be combined in any way other than conflicting features and / or steps.

Unless otherwise noted, all features disclosed in this specification (including all of the appended claims, abstracts and drawings) are replaced by alternative features having other equivalent or similar purposes. Can do. That is, unless otherwise noted, each feature is only an example of a series of equivalent or similar features.

As shown in FIG. 1, the micro speed reducer of the present invention includes an output side bearing 1, a housing 2, an output shaft 3, a slider 4, a cycloid gear 5, a cycloid gear bearing 6, an input shaft 7, an input side bearing 8, and a pulley. 9, the mounting plate 10, the pin 11, the screw 12, etc., the input shaft 7 is an eccentric shaft, the cycloid gear 5 rotates coaxially with the eccentric portion of the input shaft 7, and a cycloid gear bearing 6 is mounted between them. The input shaft 7 and the housing 2 are coaxial, the input side bearing 8 is attached between them, the output shaft 3 and the housing 2 rotate coaxially, and the output side bearing 1 is between them. It is attached.

As shown in FIGS. 2 and 3, in the micro reduction gear of the present invention, a single-stage cycloid pin gear transmission is configured by the input shaft 7, the cycloid gear 5, the housing 2, and the pin 11, and distributed in the housing 2. Since almost all the pins 11 are in contact with the cycloid gear 5, the meshing rate is extremely high and the load bearing capacity is high.

As shown in FIG. 1 and FIG. 3, in the micro reduction gear of the present invention, the cycloid gear 5 and the slider 4 slide with each other to form a sliding pair, and the slider 4 further slides with the output shaft 3. A sliding pair is formed, and both sliding directions are cross-shaped.

Further, the input shaft 7 is an eccentric shaft and rotates coaxially with the housing 2 under the restriction of the input side bearing 8. The eccentric portion rotates coaxially with the cycloid gear 5 and the cycloid gear bearing 6, and the cycloid gear 6. When the input shaft 7 rotates once, the cycloid gear 5 rotates in the opposite direction by one tooth.

Further, while the output shaft 3 and the housing 2 are constrained by the output side bearing 1 and hold the same axis, the cycloid gear 5 is a combination of revolution and rotation around the input bearing 7, and FIG. 3, the notch of the cycloid gear 5 engages with the boss of the slider 4 to form a sliding pair, and the notch of the slider 4 engages with the boss of the output shaft 3 to form a sliding pair. Both sliding directions are perpendicular to each other in a cross shape, and the rotational motion of the cycloid gear 5 is transmitted to the output shaft 3 as equivalent to a cross coupling.

Further, since the output shaft 3 is coaxial with the housing 2 and the housing 2 is coaxial with the input shaft 7, the output shaft 3 and the input shaft 7 are also coaxial. When the housing 2 is fixed, the input shaft 7 and the output shaft 3 are fixed. If the rotation direction is reversed and the output 3 is fixed, the rotation directions of the input shaft 7 and the housing 2 are the same.

As shown in FIG. 5, the rotation of the input shaft 7 of the present invention may be provided by a belt transmission system by a DC motor 102, and a motor pulley 104 is attached to the shaft of the DC motor 102. When the DC motor 102 rotates, the input shaft 7 is rotated by a belt transmission system using the motor pulley 104, the belt 103, and the pulley 9.

As shown in FIG. 6, the rotation of the input shaft 7 of the present invention may be provided by a gear transmission system by a DC motor 102, and a motor pulley 104 is attached to the shaft of the DC motor 102. When the pulley 9 is changed to the gear 106 and the DC motor 102 rotates, the input shaft 7 is rotated by the meshing transmission system of the motor gear 105 and the gear 106.

As shown in FIG. 7, the rotation of the input shaft 7 of the present invention may be provided in a direct connection manner by the DC motor 102, and the output shaft of the DC motor 102 becomes the input shaft 7. When the DC motor 102 rotates, the input shaft 7 is directly rotated.

6 and 7 are both sheet-like mounting modes, which are substantially the same except that belt transmission is used on one side and gear transmission is used on the other side. In the case of belt transmission, the diameter of the pulley is the same. In the case of designing as a gear transmission system, it has the advantage that the center distance of one-stage deceleration can be largely prevented without increasing the size and the noise at high speed of the DC motor is extremely small. Since the reduction ratio of the first gear is limited by the outer dimensions and is almost 1, and it is meaningless except that the mounting method is a sheet shape, it is necessary to design it as a two-speed gear meshing method. However, as an input stage, the noise is not ideal.

Furthermore, the mounting method shown in FIG. 7 has the main advantage of achieving both simplification and practical use by making the input and output coaxial, but on the other hand, it increases the length of the entire structure sufficiently. Not compact.

The above are only specific embodiments of the present invention, and the scope of protection of the present invention is not limited to them, and all changes or substitutions that can be conceived without requiring creative efforts are not limited to the scope of protection of the present invention. Belonging to. For this reason, the protection scope of the present invention is based on the protection scope limited to the scope of claims.

In the figure: 1, output side bearing, 2, housing, 3, output shaft, 4, slider, 5, cycloid gear, 6, cycloid gear bearing, 7, input shaft, 8, input side bearing, 9, pulley, 10, Mounting plate, 11, pin, 12, screw, 101, present invention (without pulley 9), 102, DC motor, 103, belt, 104, motor pulley, 105, motor gear, 106, gear.

Claims (7)

Input side bearing (1), housing (2), output shaft (3), slider (4), cycloid gear (5), cycloid gear bearing (6), input shaft (7), input side bearing (8), pulley (9), a mounting plate (10), a pin (11), and a screw (12). The input side bearing (8) is mounted between the input shaft (7) and the housing (2), and the output side bearing (1 ) Is mounted between the output shaft (2) and the housing (2), the cycloid gear bearing (6) is mounted between the cycloid gear (5) and the input shaft (7), and the pulley (9) is connected to the input shaft ( 7), the input shaft (7) is an eccentric shaft, the cycloid gear (5) rotates coaxially with the eccentric portion of the input shaft (7), and the input shaft (7) is coaxial with the housing (2). Yes, the input side bearing (8) is installed between the input shaft (7) and the housing (2). Attached is an output shaft (3) rotates coaxially to the housing (2), the micro-reduction gear, characterized in that the output-side bearing (1) is mounted therebetween. The micro reduction gear according to claim 1, wherein the input shaft (7), the cycloid gear (5), the housing (2), and the pin (11) constitute a one-stage cycloid pin gear reduction mechanism. The micro reduction gear according to claim 2, characterized in that the number of the cycloid gears (5) is one, two or three. The slider (4) has a cross structure, and is engaged with the cycloid gear (5) and the output shaft (3) to form a linear motion pair, and both movement directions are cross-shaped. The micro reducer according to claim 1. The said input shaft (7) attaches a pulley (9), uses belt transmission as a power input, uses a gear, or is directly connected to a motor and driven. Micro reducer. The input shaft (7) is coaxial with the output shaft (3), has a reversible input output, and serves as an acceleration mechanism when the output shaft (7) is used as an input end. Micro reducer as described in. The notch of the cycloid gear (5) engages with the boss of the slider (4) to form a sliding pair, and the notch of the slider (4) engages with the boss of the output shaft (3) to slide 2. The micro reduction gear according to claim 1, wherein the micro reduction gear is configured as a kinematic pair, in which both sliding directions are perpendicular to each other to form a cross shape.