Speed reducer with high transmission ratio

Abstract

The invention provides a speed reducer with a high transmission ratio, which comprises a first-stage cycloidal-pin wheel speed reducer and a second-stage cycloidal-pin wheel speed reducer, and the first-stage cycloidal-pin wheel speed reducer and the second-stage cycloidal-pin wheel speed reducer are connected through a transmission seat; the input end of the first-stage cycloidal-pin wheel speed reducer is provided with a connecting base used for being connected with a plurality of motors. According to the speed reducer with the high transmission ratio, the transmission ratio of 5000-9000 can be achieved, the structure is compact, large-torque output in a narrow space is achieved, the size can be further reduced through the scheme that multiple drive servo motors are arranged for input drive, and the second connecting base can serve as a substitute drive source when other servo motors break down. The threaded hole formed in the output base can provide enough shearing resistance when large torque is improved and connected. And the arranged through shaft structure is convenient for a cable to pass through, so that the appearance is more attractive. And the annular grating ruler is arranged, so that angle feedback with higher precision can be provided, and the control precision is improved.

Description

Technical Field

[0001] This invention relates to the field of speed reducers, and in particular to a high transmission ratio speed reducer. Background Technology

[0002] In some major engineering projects, high-torque reducers are required. For example, in a large project, it is necessary to output a torque of up to 468 kN·m in a relatively confined space. It is known that existing reducers cannot meet this requirement. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a high transmission ratio reducer that can achieve high transmission ratio and large torque output, and meet the demand for large torque output in a confined space.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a high transmission ratio reducer, including a first-stage cycloidal pinwheel reducer and a second-stage cycloidal pinwheel reducer, wherein the first-stage cycloidal pinwheel reducer and the second-stage cycloidal pinwheel reducer are connected by a transmission seat; The input end of the first-stage cycloidal pinwheel reducer is provided with a connector for connecting multiple motors.

[0005] In the preferred embodiment, the transmission ratio of the reducer, i.e., the input-output ratio, reaches 5000:1.

[0006] In a preferred embodiment, the first-stage cycloidal pinwheel reducer is provided with a housing, the inner cavity of which is fixedly connected to the first pin tooth housing, and the end of the housing near the transmission seat is fixedly connected to the end face of the second pin tooth housing by a plurality of flange bolts. The connector includes a first connector, and a plurality of first connectors are evenly distributed along the circumference; The housing is provided with an input gear at the position corresponding to the connecting seat. The input gear meshes with the large gear ring of the central double gear. The small gear ring of the central double gear meshes with the first planetary gear. The first planetary gear is fixedly connected to the first crankshaft. The first crankshaft is provided with two eccentric rollers. Each eccentric roller abuts against the two cycloidal wheels of the first set of cycloidal wheels. The first set of cycloidal wheels is also fixedly connected to the transmission seat. The edge of the first set of cycloidal wheels alternately meshes with the needle teeth in the first needle tooth housing. The transmission base is fixedly connected to the sun gear, the sun gear is meshed with the second planet gear, the second planet gear is fixedly connected to the second crankshaft, the second crankshaft is provided with two eccentric rollers, each eccentric roller is abutted against the two cycloidal wheels of the second set of cycloidal wheels, and the second set of cycloidal wheels is also fixedly connected to the output base.

[0007] In a preferred embodiment, the connecting seat includes a first connecting seat and a second connecting seat, and there are three first connecting seats, which are evenly distributed along the circumference; The first connector is used for fixed connection with the servo motor, and the output shaft of the servo motor is fixedly connected to the input gear. The second connector is located between the two first connectors and is used for maintenance in case of a malfunction.

[0008] In the preferred embodiment, the transmission ratio of the reducer, i.e., the input-output ratio, reaches 9000:1.

[0009] In the preferred embodiment, the diameter of the first set of cycloidal wheels is smaller than the diameter of the second set of cycloidal wheels.

[0010] In a preferred embodiment, a through shaft is provided in the housing and the second needle tooth housing, and the through shaft is fixedly connected to the output seat; The through shaft has a central cavity, an inner ring bearing is provided at one end of the through shaft near the output seat, and an annular grating ruler is provided at the other end.

[0011] In a preferred embodiment, the first planetary gear is fixedly connected to the first crankshaft via a spline structure; The second planetary gear is fixedly connected to the second crankshaft via a spline structure.

[0012] In the preferred embodiment, the first set of cycloidal wheels is fixedly connected to the transmission seat by multiple pins, and the multiple pins are evenly distributed along the circumference; The transmission seat is supported inside the second needle tooth housing by two sets of transmission seat bearings. The first crankshaft is connected to the transmission seat via a crankshaft support bearing.

[0013] In a preferred embodiment, the end face of the output base is provided with multiple threaded holes for connecting the load.

[0014] This invention provides a high-ratio reducer capable of achieving a transmission ratio of 5000~9000, with a compact structure that enables high torque output in confined spaces. The multi-drive servo motor input scheme further reduces size, and the included second connector can serve as a backup drive source when other servo motors fail. The threaded hole on the output connector provides sufficient shear resistance for high torque connections. The through-shaft structure facilitates cable passage and enhances aesthetics. The included annular optical encoder provides higher-precision angle feedback, improving control accuracy. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is the front view of the present invention.

[0016] Figure 2 This is a front sectional view of the present invention.

[0017] Figure 3 This is a side view of the input end of the present invention.

[0018] Figure 4 This is a side view of the output end of the present invention.

[0019] Figure 5 for Figure 1 A magnified view of a portion of point A in the middle.

[0020] In the diagram, the components are: input gear 1, central double gear 2, first planetary gear 3, first crankshaft 4, first cycloidal gear 5, transmission seat 6, first pin gear housing 7, second planetary gear 8, sun gear 9, second crankshaft 10, second cycloidal gear 11, output seat 12, threaded hole 121, second pin gear housing 13, flange bolt 14, lifting ring 15, inner ring bearing 16, crankshaft support bearing 17, spline pin 18, transmission seat bearing 19, through pin 20, through shaft 21, housing 22, connecting pin 23, annular grating ruler 24, first-stage cycloidal pinwheel reducer 100, second-stage cycloidal pinwheel reducer 200, servo motor 300, first connecting seat 301, and second connecting seat 302. Detailed Implementation

[0021] Example 1: like Figure 1 As shown, a high transmission ratio reducer includes a first-stage cycloidal pinwheel reducer 100 and a second-stage cycloidal pinwheel reducer 200, which are connected by a transmission seat 6. The input end of the first-stage cycloidal pinwheel reducer 100 is provided with a connector for connecting multiple motors.

[0022] In the preferred embodiment, the transmission ratio of the reducer, i.e., the input-output ratio, reaches 5000:1.

[0023] Example 2: In a preferred embodiment, the first-stage cycloidal pinwheel reducer 100 is provided with a housing 22, the inner cavity of the housing 22 is fixedly connected to the first pin tooth housing 7, and the end of the housing 22 near the transmission seat 6 is fixedly connected to the end face of the second pin tooth housing 13 by a plurality of flange bolts 14. The connector includes a first connector 301, and a plurality of first connectors 301 are evenly distributed along the circumference; The housing 22 is provided with an input gear 1 at the position corresponding to the connecting seat. The input gear 1 is meshed with the large gear ring of the central double gear 2. The small gear ring of the central double gear 2 is meshed with the first planetary gear 3. The first planetary gear 3 is fixedly connected to the first crankshaft 4. The first crankshaft 4 is provided with two eccentric rollers. Each eccentric roller is abutted and connected to the two cycloidal wheels of the first set of cycloidal wheels 5. The first set of cycloidal wheels 5 is also fixedly connected to the transmission seat 6. The edge of the first set of cycloidal wheels 5 is alternately meshed with the needle teeth in the first needle tooth housing 7. The transmission seat 6 is fixedly connected to the sun gear 9, the sun gear 9 is meshed with the second planet gear 8, the second planet gear 8 is fixedly connected to the second crankshaft 10, the second crankshaft 10 is provided with two eccentric rollers, each eccentric roller is abutted and connected to the two cycloidal wheels of the second set of cycloidal wheels 11, and the second set of cycloidal wheels 11 is also fixedly connected to the output seat 12.

[0024] In a preferred embodiment, the connecting seat includes a first connecting seat 301 and a second connecting seat 302. There are three first connecting seats 301, and the three first connecting seats 301 are evenly distributed along the circumference. The first connecting seat 301 is used to be fixedly connected to the servo motor 300, and the output shaft of the servo motor 300 is fixedly connected to the input gear 1; The second connector 302 is located between the two first connectors 301 and is used for maintenance in case of failure.

[0025] In the preferred embodiment, the transmission ratio of the reducer, i.e., the input-output ratio, reaches 9000:1.

[0026] In a preferred embodiment, the diameter of the first set of cycloidal wheels 5 is smaller than the diameter of the second set of cycloidal wheels 11.

[0027] In a preferred embodiment, a through shaft 21 is provided in the housing 22 and the second needle tooth housing 13, and the through shaft 21 is fixedly connected to the output seat 12; The through shaft 21 has a central cavity. An inner ring bearing 16 is provided at one end of the through shaft 21 near the output seat 12, and an annular grating ruler 24 is provided at the other end.

[0028] In a preferred embodiment, the first planetary gear 3 is fixedly connected to the first crankshaft 4 via a spline structure; The second planetary gear 8 is fixedly connected to the second crankshaft 10 via a spline structure.

[0029] In the preferred embodiment, the first set of cycloidal wheels 5 is fixedly connected to the transmission seat 6 via multiple pins 20, and the multiple pins 20 are evenly distributed along the circumference; The transmission seat 6 is supported in the second needle tooth housing 13 by two sets of transmission seat bearings 19. The first crankshaft 4 is connected to the transmission seat 6 via the crankshaft support bearing 17.

[0030] In a preferred embodiment, the end face of the output base 12 is provided with a plurality of threaded holes 121 for connecting the load.

[0031] Example 3: Based on Example 2, the first stage of transmission is the transmission between the input gear 1 and the large gear ring of the central double gear 2, with a gear ratio of 50:153 and a transmission ratio of 3.06. The second and third stage transmissions are a transmission structure consisting of the small gear ring of the central double gear 2, the first planetary gear 3, the first set of cycloidal gears 5, and the first pin gear housing 7, with a transmission ratio of approximately 37.34.

[0032] The fourth and fifth stages of transmission are the transmission structure of the sun gear 9, the second planetary gear 8, the second set of cycloidal gears 11, and the second pin gear housing 13, with a transmission ratio of approximately 81. The total transmission ratio is approximately 3.06 × 37.34 × 81 = 9255.0924. The transmission ratio reaches 9000:1.

[0033] Selecting two or more motors with an input power exceeding 8.5kW and a speed of 2000rpm will meet the load requirement of 468KN.M.

[0034] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The embodiments and features described in these embodiments can be arbitrarily combined without conflict. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A high-ratio reduction gear characterised in that: The first cycloid pin wheel reducer (100) and the second cycloid pin wheel reducer (200) are connected through the transmission seat (6); The input end of the first cycloid pin wheel reducer (100) is provided with a connecting seat for connecting multiple motors.

2. A high-ratio reduction gear as claimed in claim 1, characterised in that: The transmission ratio of the reducer, i.e. the input / output ratio, reaches 5000:

1.

3. A high-ratio reduction gear as claimed in claim 1, characterised in that in The first cycloid pin wheel reducer (100) is provided with a shell (22), the inner cavity of the shell (22) is fixedly connected with the first pin gear shell (7), and one end of the shell (22) close to the transmission seat (6) is fixedly connected with the end face of the second pin gear shell (13) through multiple flange screws (14); The connecting seat includes first connecting seats (301), and multiple first connecting seats (301) are uniformly distributed along the circumference; The shell (22) is provided with an input gear (1) at the position corresponding to the connecting seat, the input gear (1) is in meshing connection with the large gear ring of a central double gear (2), the small gear ring of the central double gear (2) is in meshing connection with a first planetary gear (3), the first planetary gear (3) is fixedly connected with a first crank shaft (4), two eccentric rollers are arranged on the first crank shaft (4), each eccentric roller is in abutting connection with two cycloid pin wheels of a first group of cycloid pin wheels (5), the first group of cycloid pin wheels (5) are further fixedly connected with the transmission seat (6), and the edges of the first group of cycloid pin wheels (5) are in alternating meshing connection with pin gears in the first pin gear shell (7). The transmission seat (6) is fixedly connected with a sun gear (9), the sun gear (9) is in meshing connection with a second planetary gear (8), the second planetary gear (8) is fixedly connected with a second crank shaft (10), two eccentric rollers are arranged on the second crank shaft (10), each eccentric roller is in abutting connection with two cycloid pin wheels of a second group of cycloid pin wheels (11), and the second group of cycloid pin wheels (11) are further fixedly connected with an output seat (12).

4. A high-ratio reduction gear as claimed in claim 3, characterised in that: The connecting seat includes first connecting seats (301) and second connecting seats (302), the first connecting seats (301) are three, and the three first connecting seats (301) are uniformly distributed along the circumference; The first connecting seats (301) are used for being fixedly connected with servo motors (300), and the output shafts of the servo motors (300) are fixedly connected with the input gear (1); The second connecting seat (302) is located at the position between the two first connecting seats (301) and is used for maintenance when a fault occurs.

5. A high-ratio reduction gear as claimed in claim 3, characterised in that: The transmission ratio of the reducer, i.e. the input / output ratio, reaches 9000:

1.

6. A high-ratio reduction gear as claimed in claim 3, characterised in that: The diameter of the first group of cycloid pin wheels (5) is smaller than that of the second group of cycloid pin wheels (11).

7. A high-ratio reduction gear as claimed in claim 3, characterised in that: A through shaft (21) is arranged on the shell (22) and the second pin gear shell (13), and the through shaft (21) is fixedly connected with the output seat (12); The through shaft (21) is provided with a cavity in the middle, an inner ring bearing (16) is arranged on one end of the through shaft (21) close to the output seat (12), and an annular grating ruler (24) is arranged on the other end.

8. A high-ratio reduction gear as claimed in claim 3, characterised in that: The first planetary gear (3) is fixedly connected with the first crank shaft (4) through a spline structure; The second planetary gear (8) is fixedly connected with the second crank shaft (10) through a spline structure.

9. A high-ratio reduction gear as claimed in claim 3, characterised in that: The first set of cycloid wheels (5) are fixedly connected with the transmission seat (6) through a plurality of through pins (20), and the plurality of through pins (20) are uniformly distributed along the circumference; The transmission seat (6) is supported in the second pin gear housing (13) through two sets of transmission seat bearings (19); The first crank shaft (4) is connected with the transmission seat (6) through a crank shaft support bearing (17).

10. A high-ratio reduction gear as claimed in claim 3, characterised in that: The end surface of the output seat (12) is provided with a plurality of threaded holes (121) for connecting the load.

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