Extremely-short large-torque high-precision planetary reducer

Abstract

The utility model discloses an extremely-short large-torque high-precision planetary reducer which comprises a single-stage inner gear ring, a double-stage inner gear ring is arranged at the bottom of the single-stage inner gear ring, the single-stage inner gear ring and the double-stage inner gear ring are in threaded connection through a plurality of first inner hexagonal screws, a connecting shaft is arranged in the double-stage inner gear ring, and a plurality of second inner hexagonal screws are arranged in the connecting shaft. An output shaft is arranged at the top of the interior of the single-stage inner gear ring, a first bearing pressing plate is arranged outside the output shaft, and a crossed roller bearing is connected to the outside of the output shaft. By means of the arrangement of the single crossed roller bearing, the structure is short and small, and the crossed roller bearing is closely connected with all parts, so that the axial structure of the device is reduced, and the service life of the device is prolonged; and the overall occupied area of the device is reduced, so that the device is suitable for occasions with limited installation space, the applicability of the device is effectively improved, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to a planetary reducer, in particular to an extremely short type, high-torque, high-precision planetary reducer. Background Art

[0002] Planetary reducer is a widely used industrial product that can reduce the speed of the motor and increase the output torque. The internal gear of the planetary reducer is made of 20CrMnTi carburized, quenched and ground. It has the characteristics of small size, light weight, high load-bearing capacity, long service life, stable operation, low noise, large output torque, large speed ratio, high efficiency and safe performance. It has the unique characteristics of power splitting and multi-tooth meshing. It is a new type of reducer with wide versatility. The maximum input power can reach 4kW. It is suitable for industrial sectors such as lifting and transportation, engineering machinery, metallurgy, mining, petrochemical, construction machinery, light industry and textiles, medical equipment, instrumentation, automobiles, ships, weapons and aerospace. The new planetary series WGN fixed-axis transmission reducer, WN mother-and-child gear transmission reducer, and elastic load-sharing small tooth difference reducer.

[0003] The existing planetary reducer structure is not perfect and still has certain defects:

[0004] The existing planetary reducer has a complex internal structure and many parts, so the reducer body size is large. If the installation space is limited during use, it is difficult to install and use the reducer, so it has certain limitations. Utility Model Content

[0005] The purpose of the utility model is to provide an extremely short, high-torque, high-precision planetary reducer to solve the problem that the existing planetary reducer proposed in the above background technology has a complex internal structure and many parts, so the reducer body size is large, and if the installation space is limited when in use, it is difficult to install and use the reducer.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an extremely short, high-torque, high-precision planetary reducer, comprising a single-stage internal gear ring, a double-stage internal gear ring is provided at the bottom of the single-stage internal gear ring, the single-stage internal gear ring and the double-stage internal gear ring are threadedly connected by a plurality of first inner hexagon screws, a connecting shaft is provided inside the double-stage internal gear ring, an output shaft is provided at the top of the single-stage internal gear ring, a first bearing pressure plate is provided outside the output shaft, a cross roller bearing is connected to the outside of the output shaft, the output shaft and the cross roller bearing are transitionally matched, the cross roller bearing is pressed by a second bearing pressure plate, and the second bearing pressure plate is threadedly connected to the output shaft; a sun gear is meshedly connected to the connecting shaft, a plurality of planetary gears are meshedly connected to the outer wall of the sun gear, and the plurality of planetary gears are meshedly connected to the single-stage internal gear ring.

[0007] As a preferred technical solution of the utility model, a plurality of first hexagon socket screws are symmetrically installed on the double-stage internal gear ring, and the plurality of first hexagon socket screws are all threadedly connected to the first bearing pressure plate of AG064.

[0008] As a preferred technical solution of the utility model, an output shaft front cover is provided at the bottom end of the output shaft, and a C-shaped key is provided on the outside of the sun gear.

[0009] As a preferred technical solution of the utility model, a plurality of retainer bearings are installed on the connecting shaft, a first PIN is installed on each of the plurality of retainer bearings, a plurality of second PINs are installed on the output shaft, and the plurality of first PINs are located at the bottom of adjacent second PINs.

[0010] As a preferred technical solution of the present utility model, wear-resistant sheets are installed at the bottom ends of the first PINs and the second PINs.

[0011] As a preferred technical solution of the utility model, multiple first PINs are provided with double-stage planetary gears on the outside, multiple second PINs are provided with multiple needle rollers on the outside, and multiple needle rollers are connected to adjacent planetary gears.

[0012] As a preferred technical solution of the utility model, a skeleton oil seal is provided between the output shaft and the top of the first bearing pressure plate, and a plurality of second hexagon socket screws are threadedly installed on the bottom end of the output shaft.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model adopts the setting of a single cross roller bearing, has a short structure, and is closely connected with various components, so that the device structure is reduced, thereby reducing the overall footprint of the device while ensuring that it can withstand large radial forces and axial forces at the same time. Therefore, it is suitable for occasions where the installation space is limited and the radial and axial forces are required to be large, thereby effectively improving the applicability and practicability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a side view structural schematic diagram of the utility model;

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 4 It is a schematic diagram of the partial cross-sectional structure of the utility model.

[0019] In the figure: 1. Single-stage internal gear ring; 2. Double-stage internal gear ring; 3. First hexagon socket screw; 4. Output shaft front cover; 5. Wear-resistant plate; 6. Connecting shaft; 7. Sun gear; 8. C-type key; 9. Cage needle roller bearing; 10. First PIN; 11. Second PIN; 12. Double-stage planetary gear; 13. Needle roller; 14. Planetary gear; 15. Output shaft; 16. First bearing pressure plate; 17. Skeleton oil seal; 18. Cross roller bearing; 19. Second bearing pressure plate; 20. Second hexagon socket screw. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] The utility model provides an extremely short type high-precision planetary reducer with large torque through improvement. The technical solution of the utility model is:

[0022] like Figure 1 - Figure 4 As shown, it includes a single-stage internal gear ring 1, a double-stage internal gear ring 2 is provided at the bottom of the single-stage internal gear ring 1, the single-stage internal gear ring 1 and the double-stage internal gear ring 2 are threadedly connected by a plurality of first hexagon socket screws 3, a connecting shaft 6 is provided inside the double-stage internal gear ring 2, an output shaft 15 is provided at the top inside the single-stage internal gear ring 1, a first bearing pressure plate 16 is provided outside the output shaft 15, a cross roller bearing 18 is connected to the outside of the output shaft 15, the output shaft 15 and the cross roller bearing 18 are transitionally matched, the cross roller bearing 18 is pressed by a second bearing pressure plate 19, the second bearing pressure plate 19 is threadedly connected to the output shaft 15, a sun gear 7 is meshedly connected to the connecting shaft 6, a plurality of planetary gears 14 are meshedly connected to the outer wall of the sun gear 7, and the plurality of planetary gears 14 are all meshedly connected to the single-stage internal gear ring 1, by adopting the setting of a single cross roller bearing 18, the structure is short and small, and is closely connected with each component, so that the device structure is reduced, thereby reducing the overall footprint of the device, so it is suitable for occasions with limited installation space.

[0023] Furthermore, a plurality of first hexagon socket screws 3 are symmetrically installed on the two-stage internal gear ring 2, and the plurality of first hexagon socket screws 3 are all threadedly connected to the first bearing pressure plate 16. An output shaft front cover 4 is provided at the bottom end of the output shaft 15, and a C-shaped key 8 is provided on the outside of the sun gear 7. The output shaft front cover 4 protects the output shaft 15.

[0024] Furthermore, a plurality of retainer needle bearings 9 are mounted on the connecting shaft 6 , a first PIN 10 is mounted on each of the plurality of retainer needle bearings 9 , a plurality of second PINs 11 are mounted on the output shaft 15 , and the plurality of first PINs 10 are located at the bottom of adjacent second PINs 11 .

[0025] Furthermore, wear-resistant sheets 5 are installed at the bottom ends of the first PINs 10 and the second PINs 11 , and the two wear-resistant sheets 5 respectively play a role in protecting the first PINs 10 and the second PINs 11 from wear.

[0026] Furthermore, a double-stage planetary gear 12 is provided on the outside of multiple first PINs 10, a plurality of roller needles 13 are provided on the outside of multiple second PINs 11, and the multiple roller needles 13 are connected to adjacent planetary gears 14. A skeleton oil seal 17 is provided between the output shaft 15 and the top of the first bearing pressure plate 16, and a plurality of second hexagon socket screws 20 are threadedly installed on the bottom end of the output shaft 15, and the plurality of second hexagon socket screws 20 play a role of fixed installation.

[0027] Working principle: the external servo motor is connected to the connecting shaft 6, which drives the two-stage planetary gear 12 to rotate through the connecting shaft 6, and further drives the planetary gear 14 to rotate through the two-stage planetary gear 12. The planetary gear 14 is rotationally connected to the single-stage internal gear ring 1, and the two-stage planetary gear 12 is transmission-connected to the single-stage internal gear ring 1. With the cooperation of the cross roller bearing 18, the output shaft 15 is driven to rotate, and the output shaft 15 is connected to the external connection to achieve a transmission effect.

[0028] In the description of the present invention, it is necessary to understand that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extremely short, high-torque, high-precision planetary reducer, comprising a single-stage internal gear ring (1), characterized in that: A double-stage internal gear ring (2) is provided at the bottom of the single-stage internal gear ring (1), and the single-stage internal gear ring (1) and the double-stage internal gear ring (2) are threadedly connected by a plurality of first hexagon socket screws (3). A connecting shaft (6) is provided inside the double-stage internal gear ring (2), and an output shaft (15) is provided at the top inside the single-stage internal gear ring (1). A first bearing pressure plate (16) is provided outside the output shaft (15), and a cross roller bearing (18) is connected to the outside of the output shaft (15). The output shaft (15) and the cross roller bearing (18) are transitionally matched, and the cross roller bearing (18) is pressed by a second bearing pressure plate (19). The second bearing pressure plate (19) is threadedly connected to the output shaft (15), and a sun gear (7) is meshedly connected to the connecting shaft (6). The outer wall of the sun gear (7) is meshedly connected to a plurality of planetary gears (14), and the plurality of planetary gears (14) are all meshedly connected to the single-stage internal gear ring (1).

2. According to claim 1, an extremely short type, high torque, high precision planetary reducer is characterized by: A plurality of first hexagon socket screws (3) are symmetrically mounted on the double-stage internal gear ring (2), and the plurality of first hexagon socket screws (3) are all threadedly connected to the first bearing pressure plate (16).

3. The extremely short type, high torque, high precision planetary reducer according to claim 1, characterized in that: An output shaft front cover (4) is provided at the bottom end of the output shaft (15), and a C-shaped key (8) is provided on the outside of the sun gear (7).

4. The extremely short type, high torque, high precision planetary reducer according to claim 1, characterized in that: A plurality of retainer needle roller bearings (9) are mounted on the connecting shaft (6), a first PIN (10) is mounted on each of the plurality of retainer needle roller bearings (9), a plurality of second PINs (11) are mounted on the output shaft (15), and the plurality of first PINs (10) are located at the bottom of adjacent second PINs (11).

5. The extremely short type, high torque, high precision planetary reducer according to claim 4, characterized in that: A wear-resistant sheet (5) is installed at the bottom ends of the plurality of first PINs (10) and second PINs (11).

6. The extremely short type, high torque, high precision planetary reducer according to claim 5, characterized in that: A double-stage planetary gear (12) is disposed outside each of the plurality of first PINs (10), a plurality of roller needles (13) are disposed outside each of the plurality of second PINs (11), and the plurality of roller needles (13) are connected to adjacent planetary gears (14).

7. The extremely short type, high torque, high precision planetary reducer according to claim 1, characterized in that: A skeleton oil seal (17) is provided between the output shaft (15) and the top of the first bearing pressure plate (16), and a plurality of second hexagon socket screws (20) are threadedly mounted on the bottom end of the output shaft (15).

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