CN111998039A - A high-precision planetary reducer and connector - Google Patents

Abstract

The invention discloses a high-precision planetary reducer which comprises a supporting seat, a sun wheel, at least two planet wheels and an elastic outer ring, wherein the sun wheel is arranged on the supporting seat, the outer diameter surface of the sun wheel is smooth and toothless, the inner diameter of the elastic outer ring is smaller than the diameter of the outer diameter of the sun wheel and the diameter of the outer sum of 2 opposite planet wheels, so that the planet wheels and the inner ring of the elastic outer ring are mutually extruded, and torsion is transmitted outwards through the elastic outer ring; the speed reduction ratio is high, no vibration, high transmission precision and low noise.

Description

A high-precision planetary reducer and connector

technical field

The invention belongs to the field of reducers, and is especially related to high-precision planetary reducers.

Background technique

Existing planetary reducers all use gears to realize deceleration transmission, which has defects such as small reduction ratio, large vibration, poor transmission accuracy, and large noise.

SUMMARY OF THE INVENTION

Aiming at the problems of small reduction ratio, large vibration, poor transmission accuracy and high noise of the existing planetary reducer, the present invention aims to provide a planetary reducer and connector with high reduction ratio, no vibration, high transmission precision and low noise .

For this reason, the present invention adopts the following technical solutions:

A high-precision planetary reducer, comprising a support seat, a sun gear arranged on the support seat and having a smooth outer diameter surface without teeth, a planet wheel, and an elastic outer ring, the inner diameter of the elastic outer ring is smaller than the outer diameter of the sun gear The diameter of the outer ring and the outer diameter of the two planetary wheels make the outer ring of the planetary wheel and the inner ring of the elastic outer ring squeeze each other, and the torsion force is transmitted outward through the elastic outer ring.

Preferably, ribs are provided on both sides of the inner circular surface of the elastic outer ring.

Preferably, the support base is connected with a cover plate covering one side of the sun gear and the planet gear, and the cover plate is fixed on the support base by screws.

A connector, including the above-mentioned high-precision planetary reducer, the side of the elastic outer ring facing the rigid connector is provided with at least two circular holes, and the side of the rigid connector facing the elastic outer ring is provided There is a cylindrical needle matched with a circular hole to transmit the torque of the planetary reducer, and the diameter of the circular hole is larger than the outer diameter of the cylindrical needle.

Preferably, elastic adhesive is filled between the elastic outer ring and the rigid connector.

Preferably, the inner side of the rigid connector is provided with a groove which is matched with the cover plate.

Beneficial effects:

The planetary reducer has a high reduction ratio (a single-stage maximum reduction ratio of 13.5:1), no vibration, and high transmission accuracy. Since the sun gear and the planetary gear are both set to have a gearless structure, the planetary reducer is in operation. Very little noise.

Description of drawings

FIG. 1 is a schematic structural diagram of a high-precision planetary reducer of the present invention.

FIG. 2 is a schematic structural diagram of the connector of the present invention.

Labels: 1. Sun gear; 2. Planetary gear; 3. Elastic outer ring; 4. Connector; 5. Support seat; 6. Round hole; 7. Cylindrical needle; 8. Elastic adhesive; 9. Support shaft ; 10, cover plate; 11, screws; 12, screw holes; 13, bearings; 14, ribs.

Detailed ways

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The described embodiments are only illustrations and explanations of the present invention, and do not constitute the only limitation of the present invention.

As shown in Figures 1 and 2, a high-precision planetary reducer includes a support seat 5, a sun gear 1, a planetary gear 2, and an elastic outer ring 3. The inner circular surface of the elastic outer ring 3 is provided with retaining edges 14 on both sides. , the rib 14 is in contact with the end face of the planetary gear 2, the sun gear 1 is arranged on the support seat 5 and the inner and outer diameter surfaces are smooth and toothless, and the support seat 5 is provided with three planetary gears 2 support shafts 9, Installed on the support shaft 9 of the planetary gear 2, a mounting bearing 13 is arranged between the inner hole of the planetary gear 2 and the support shaft 9 to reduce frictional resistance, and the outer diameter surface of the planetary gear is smooth and toothless.

The inner diameter of the elastic outer ring 3 is smaller than the sum of the diameter of the sun gear 1 and the diameter of the planetary gear 2, so that the outer ring of the planetary gear 2 and the inner ring of the elastic outer ring 3 are pressed against each other, and the transmission is transmitted outward through the elastic outer ring 3 and when installing, the elastic outer ring 3 must be heated to expand to become larger and then sleeved on the planetary gear 2, and the planetary gear 2 and the sun gear 1 must be squeezed inward by the elastic outer ring 3 to prevent the planetary gear 2 from being squeezed. and sun gear 1 slipping against each other.

The support base 5 is connected with a cover plate 10 covering the side of the sun gear 1 and the planetary gear 2 . The cover plate 10 and the support base 5 are both provided with screw holes 12 , and the cover plate 10 is fixed on the support base 5 by screws 11 . , and the end of the screw 11 is flush with the surface of the cover plate 10 .

The planetary reducer has a high reduction ratio (a single-stage maximum reduction ratio of 13.5:1), no vibration, and high transmission accuracy. Very little noise during operation.

As shown in Figures 1 and 2, a connector 4 is designed based on a high-precision planetary reducer. The elastic outer ring 3 has two or more circular holes 6, corresponding to the rigidity of the There are 2 or more cylindrical needles 7 on the connector 4 to transmit the torque of the reducer, and the diameter of the circular hole 6 on the elastic outer ring 3 must be larger than the diameter of the cylindrical needle 7 on the rigid connector 4. outer diameter. The hole between the outer diameters of the round hole 6 and the diameter of the cylindrical needle 7 (7) must be larger than the sum of the diameter of the sun gear 1 and the two planetary gears 2 minus the inner diameter of the elastic outer ring 3, in order to prevent the elastic outer ring 3 from The cylindrical needle 7 is broken during the rotational deformation. The elastic adhesive 8 is filled between the elastic outer ring 3 and the rigid connector 4 to eliminate the gap caused by the gap between the circular hole 6 on the elastic outer ring 3 and the cylindrical needle 7 on the rigid connector 4. Clearance error to improve transmission accuracy.

The sun gear 1 is driven to rotate by the motor rotor as the motor shaft, and the support base 5 can be used as the end cover of the output end of the motor. Due to the pressing action of the elastic outer ring 3, the sun gear 1 drives the planetary gear 2 to rotate, and the planetary gear 2 drives the elastic outer ring. 3 Rotate as shown in Figure 2. The elastic outer ring 3 then transmits the torque to the rigid connector 4 and the circular needle on the rigid connector 4 through the circular hole on the elastic outer ring 3 and the elastic adhesive, and drives the rigid connector 4 to rotate. , The planetary wheel 2 and the elastic outer ring 3 are driven by friction, so the distance between the planetary wheel 2 and the adjacent planetary wheel 2 can be made very small, so that the reduction ratio can be made very high.

When the invention is applied to the rotational drive of the robot joint, zero error can be realized when the joint rotates forward and reverse, and the positioning accuracy of the robot is improved.

Claims (6)

1. A high-precision planetary reducer, characterized in that: it comprises a support seat (5), a sun gear (1), a planetary wheel (2), and The inner diameter of the elastic outer ring (3) is smaller than the diameter of the outer diameter of the sun gear (1) and the outer diameter of the two planetary gears (2), so that the sun gear (1) and 2 planetary gears (2) and the inner ring of the elastic outer ring (3) squeeze each other, and the torsion force is transmitted outward through the elastic outer ring (3). 2 . The high-precision planetary reducer according to claim 1 , wherein the elastic outer ring ( 3 ) is provided with retaining edges ( 14 ) on both sides of the inner circular surface. 3 . 3. A high-precision planetary reducer according to claim 2, characterized in that: the support seat (5) is connected with a cover plate (10) covering one side of the sun gear (1) and the planetary gear (2). ), the cover plate (10) is fixed on the support seat (5) by screws (11). 4. A connector, comprising a high-precision planetary reducer according to claims 1-3, characterized in that: the elastic outer ring (3) is provided with at least two on the side facing the rigid connector (4). A circular hole (6), a cylindrical needle (7) matched with the circular hole (6) is provided on the side of the rigid connector (4) facing the elastic outer ring (3) to transmit the planetary reducer The torsion force of the circular hole (6) is larger than the outer diameter of the cylindrical needle (7). 5. A connector according to claim 4, characterized in that an elastic adhesive (8) is filled between the elastic outer ring (3) and the rigid connector (4). 6 . The connector according to claim 4 , characterized in that: the inner side of the rigid connector ( 4 ) is provided with a groove for matching with the cover plate ( 10 ). 7 .

Images