Speed reducer with high transmission ratio

Abstract

The utility model 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 is connected with the second-stage cycloidal-pin wheel speed reducer 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 when other servo motors break down, the second connecting base can be used for connecting the second connecting base with the second connecting base. The driving source is an alternative driving source. 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.

Description

Technical Field

[0001] The utility model relates to the field of speed reducers, in particular to a speed reducer with a high transmission ratio. Background Art

[0002] In some major projects, speed reducer equipment with high torque is required. For example, in a certain large project, it is necessary to output a torque of up to 468 kN·m in a relatively narrow space, and it is known that existing speed reducers cannot meet this requirement. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a speed reducer with a high transmission ratio, which can achieve a high transmission ratio and a large torque output, and meet the requirement of large torque output in a narrow space.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a speed reducer with a high transmission ratio, including a first-stage cycloid pinwheel speed reducer and a second-stage cycloid pinwheel speed reducer, and the first-stage cycloid pinwheel speed reducer is connected to the second-stage cycloid pinwheel speed reducer through a transmission seat;

[0005] A connection seat for connecting multiple motors is provided at the input end of the first-stage cycloid pinwheel speed reducer.

[0006] In a preferred solution, the transmission ratio of the speed reducer, that is, the input-output ratio reaches 5000:1.

[0007] In a preferred solution, a housing is provided in the first-stage cycloid pinwheel speed reducer. The inner cavity of the housing is fixedly connected to the first pin tooth housing, and one end of the housing close to the transmission seat is fixedly connected to the end face of the second pin tooth housing through a plurality of flange screws;

[0008] The connection seat includes a first connection seat, and a plurality of first connection seats are evenly distributed along the circumference;

[0009] An input gear is provided at the position of the housing corresponding to the connection seat. The input gear is meshed and connected to the large tooth ring of the central double gear. The small tooth ring of the central double gear is meshed and connected to the first planet gear. The first planet gear is fixedly connected to the first crankshaft. Two eccentric rollers are provided on the first crankshaft. Each eccentric roller is respectively abutted and connected to two cycloid wheels of the first group of cycloid wheels. The first group of cycloid wheels is also fixedly connected to the transmission seat. The edge of the first group of cycloid wheels is alternately meshed and connected to the pin teeth in the first pin tooth housing;

[0010] The transmission seat is fixedly connected to the sun gear. The sun gear is meshed and connected to the second planet gear. The second planet gear is fixedly connected to the second crankshaft. Two eccentric rollers are provided on the second crankshaft. Each eccentric roller is respectively abutted and connected to two cycloid wheels of the second group of cycloid wheels. The second group of cycloid wheels is also fixedly connected to the output seat.

[0011] In a preferred embodiment, the connecting seat includes a first connecting seat and a second connecting seat. There are three first connecting seats, which are evenly distributed along the circumference.

[0012] The first connecting seat is used for fixedly connecting with the servo motor, and the output shaft of the servo motor is fixedly connected with the input gear.

[0013] The second connecting seat is located between two first connecting seats and is used for maintenance when a failure occurs.

[0014] In a preferred embodiment, the transmission ratio of the reducer, that is, the input-output ratio, reaches 9000:1.

[0015] In a preferred embodiment, the diameter of the first set of cycloidal gears is smaller than that of the second set of cycloidal gears.

[0016] In a preferred embodiment, a through shaft is provided in the housing and the second pin gear housing, and the through shaft is fixedly connected with the output seat.

[0017] The through shaft is provided with a central cavity. An inner ring bearing is provided at one end of the through shaft close to the output seat, and an annular grating scale is provided at the other end.

[0018] In a preferred embodiment, the first planetary gear is fixedly connected with the first crankshaft through a spline structure.

[0019] The second planetary gear is fixedly connected with the second crankshaft through a spline structure.

[0020] In a preferred embodiment, the first set of cycloidal gears is fixedly connected with the transmission seat through a plurality of through pins, and the plurality of through pins are evenly distributed along the circumference.

[0021] The transmission seat is supported in the second pin gear housing through two sets of transmission seat bearings.

[0022] The first crankshaft is supported on the transmission seat through a crankshaft support bearing.

[0023] In a preferred embodiment, a plurality of threaded holes are provided on the end face of the output seat for connecting the load.

[0024] A reducer with a high transmission ratio provided by the present utility model can achieve a transmission ratio of 5000 - 9000, and has a compact structure, realizing large torque output in a narrow space. The multi-drive servo motor input drive scheme can further reduce the volume. The second connecting seat can be used as an alternative drive source when other servo motors fail. The threaded holes provided on the output seat can provide sufficient shear resistance when connecting a large torque. The through shaft structure is convenient for the cable to pass through, and the appearance is more beautiful. The annular grating scale can provide a higher-precision angle feedback and improve the control precision. Brief Description of the Drawings

[0025] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments:

[0026] Figure 1 This is the front view of the present utility model.

[0027] Figure 2 This is the front sectional view of the present utility model.

[0028] Figure 3 This is the side view of the input end of the present utility model.

[0029] Figure 4 This is the side view of the output end of the present utility model.

[0030] Figure 5 It is Figure 1 The partial enlarged schematic view at position A in

[0031] In the figure, input gear 1, central double gear 2, first planetary gear 3, first crankshaft 4, first group of cycloidal gears 5, transmission seat 6, first pin tooth housing 7, second planetary gear 8, sun gear 9, second crankshaft 10, second group of cycloidal gears 11, output seat 12, threaded hole 121, second pin tooth housing 13, flange screw 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 scale 24, first-stage cycloidal pinwheel reducer 100, second-stage cycloidal pinwheel reducer 200, servo motor 300, first connecting seat 301, second connecting seat 302. Specific embodiments

[0032] Embodiment 1:

[0033] As Figure 1 shown in , a reducer with a high transmission ratio includes a first-stage cycloidal pinwheel reducer 100 and a second-stage cycloidal pinwheel reducer 200, and the first-stage cycloidal pinwheel reducer 100 is connected to the second-stage cycloidal pinwheel reducer 200 through a transmission seat 6;

[0034] A connecting seat for connecting multiple motors is provided at the input end of the first-stage cycloidal pinwheel reducer 100.

[0035] In a preferred solution, the transmission ratio of the reducer, that is, the input-output ratio, reaches 5000:1.

[0036] Embodiment 2:

[0037] In a preferred solution, a housing 22 is provided in the first-stage cycloidal pinwheel reducer 100. The inner cavity of the housing 22 is fixedly connected to the first pin tooth housing 7, and one end of the housing 22 close to the transmission seat 6 is fixedly connected to the end face of the second pin tooth housing 13 through a plurality of flange screws 14;

[0038] The connecting seat includes a first connecting seat 301, and multiple first connecting seats 301 are evenly distributed along the circumference;

[0039] At the position of the housing 22 corresponding to the connecting seat, there is an input gear 1. The input gear 1 is meshed and connected with the large gear ring of the central double gear 2. The small gear ring of the central double gear 2 is meshed and connected with the first planetary gear 3. The first planetary gear 3 is fixedly connected with the first crankshaft 4. There are two eccentric rollers on the first crankshaft 4. Each eccentric roller is respectively abutted and connected with the two cycloidal gears of the first group of cycloidal gears 5. The first group of cycloidal gears 5 is also fixedly connected with the transmission seat 6. The edge of the first group of cycloidal gears 5 is alternately meshed and connected with the pin teeth in the first pin tooth housing 7;

[0040] The transmission seat 6 is fixedly connected with the sun gear 9. The sun gear 9 is meshed and connected with the second planetary gear 8. The second planetary gear 8 is fixedly connected with the second crankshaft 10. There are two eccentric rollers on the second crankshaft 10. Each eccentric roller is respectively abutted and connected with the two cycloidal gears of the second group of cycloidal gears 11. The second group of cycloidal gears 11 is also fixedly connected with the output seat 12.

[0041] In a preferred solution, 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;

[0042] The first connecting seat 301 is used for fixedly connecting with the servo motor 300, and the output shaft of the servo motor 300 is fixedly connected with the input gear 1;

[0043] The second connecting seat 302 is located at the position between the two first connecting seats 301 and is used for maintenance when a failure occurs.

[0044] In a preferred solution, the transmission ratio of the reducer, that is, the input-output ratio, reaches 9000:1.

[0045] In a preferred solution, the diameter of the first group of cycloidal gears 5 is smaller than the diameter of the second group of cycloidal gears 11.

[0046] In a preferred solution, a through shaft 21 is provided in the housing 22 and the second pin tooth housing 13, and the through shaft 21 is fixedly connected with the output seat 12;

[0047] The through shaft 21 is provided with a central cavity. An inner ring bearing 16 is provided at one end of the through shaft 21 close to the output seat 12, and an annular grating scale 24 is provided at the other end.

[0048] In a preferred solution, the first planetary gear 3 is fixedly connected with the first crankshaft 4 through a spline structure;

[0049] The second planetary gear 8 is fixedly connected with the second crankshaft 10 through a spline structure.

[0050] In a preferred embodiment, the first set of cycloidal gears 5 is fixedly connected to the transmission seat 6 through a plurality of through pins 20, and the plurality of through pins 20 are evenly distributed along the circumference;

[0051] The transmission seat 6 is supported in the second pin gear housing 13 through two sets of transmission seat bearings 19;

[0052] The first crankshaft 4 is supported on the transmission seat 6 through a crankshaft support bearing 17.

[0053] In a preferred embodiment, the end face of the output seat 12 is provided with a plurality of threaded holes 121 for connecting a load.

[0054] Embodiment 3:

[0055] On the basis of Embodiment 2, the first-stage transmission is the transmission between the input gear 1 and the large gear ring of the central double gear 2, the tooth ratio is 50:153, and the transmission ratio is 3.06;

[0056] The second and third-stage transmissions are the transmission structures 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, and the transmission ratio is about 37.34.

[0057] The fourth and fifth-stage transmissions are the transmission structures of the sun gear 9, the second planetary gear 8, the second set of cycloidal gears 11 and the second pin gear housing 13, and the transmission ratio is about 81;

[0058] The total transmission ratio is about 3.06×37.34×81 = 9255.0924. The transmission ratio reaches 9000:1.

[0059] Select motors with an input power exceeding 8.5 kw, a speed of 2000 rpm, and a quantity of more than 2 units, and the load requirement of 468 KN.M can be met.

[0060] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations to the present invention. The embodiments and the features in the embodiments in this application can be arbitrarily combined with each other without conflict. The protection scope of the present invention should be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A speed reducer with a high transmission ratio, characterized in that: It includes a first-stage cycloid pinwheel reducer (100) and a second-stage cycloid pinwheel reducer (200), and the first-stage cycloid pinwheel reducer (100) is connected to the second-stage cycloid pinwheel reducer (200) through a transmission seat (6); A connection seat for connecting multiple motors is provided at the input end of the first-stage cycloid pinwheel reducer (100).

2. The speed reducer with a high transmission ratio according to claim 1, characterized in that: The transmission ratio of the reducer, that is, the input-output ratio, reaches 5000:

1.

3. The speed reducer with a high transmission ratio according to claim 1 is characterized in that: in The first-stage cycloid pinwheel reducer (100) is provided with a housing (22), the inner cavity of the housing (22) is fixedly connected to the first pin gear housing (7), and one end of the housing (22) close to the transmission seat (6) is fixedly connected to the end face of the second pin gear housing (13) through a plurality of flange screws (14); The connection seat includes a first connection seat (301), and a plurality of first connection seats (301) are evenly distributed along the circumference; At the position of the housing (22) corresponding to the connection seat, an input gear (1) is provided, the input gear (1) is meshed and connected to the large gear ring of the central double gear (2), the small gear ring of the central double gear (2) is meshed and connected to the first planetary gear (3), the first planetary gear (3) is fixedly connected to the first crankshaft (4), two eccentric rollers are provided on the first crankshaft (4), each eccentric roller is respectively abutted and connected to two cycloid wheels of the first group of cycloid wheels (5), the first group of cycloid wheels (5) is also fixedly connected to the transmission seat (6), and the edge of the first group of cycloid wheels (5) is alternately meshed and connected to the pin teeth in the first pin gear housing (7); The transmission seat (6) is fixedly connected to the sun gear (9), the sun gear (9) is meshed and connected to the second planetary gear (8), the second planetary gear (8) is fixedly connected to the second crankshaft (10), two eccentric rollers are provided on the second crankshaft (10), each eccentric roller is respectively abutted and connected to two cycloid wheels of the second group of cycloid wheels (11), and the second group of cycloid wheels (11) is also fixedly connected to the output seat (12).

4. A high transmission ratio speed reducer according to claim 3, characterized in that: The connection seat includes a first connection seat (301) and a second connection seat (302), there are three first connection seats (301), and the three first connection seats (301) are evenly distributed along the circumference; The first connection seat (301) is used for fixedly connecting with the servo motor (300), and the output shaft of the servo motor (300) is fixedly connected to the input gear (1); The second connection seat (302) is located between the two first connection seats (301) and is used for maintenance when a failure occurs.

5. A high transmission ratio reducer according to claim 3, characterized in that: The transmission ratio of the reducer, that is, the input-output ratio, reaches 9000:

1.

6. The speed reducer with a high transmission ratio according to claim 3, characterized in that: The diameter of the first group of cycloid wheels (5) is smaller than the diameter of the second group of cycloid wheels (11).

7. A high transmission ratio reducer according to claim 3, characterized in that: A through shaft (21) is provided in the housing (22) and the second pin gear housing (13), and the through shaft (21) is fixedly connected to the output seat (12); The through shaft (21) is provided with a central cavity, an inner ring bearing (16) is provided at one end of the through shaft (21) close to the output seat (12), and an annular grating scale (24) is provided at the other end.

8. A high transmission ratio reducer according to claim 3, characterized in that: The first planetary gear (3) is fixedly connected to the first crankshaft (4) through a spline structure; The second planetary gear (8) is fixedly connected to the second crankshaft (10) through a spline structure.

9. The speed reducer with a high transmission ratio according to claim 3, characterized in that: The first set of cycloid gears (5) is fixedly connected to the transmission seat (6) through a plurality of through pins (20), and the plurality of through pins (20) are evenly 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 crankshaft (4) is supported on the transmission seat (6) through a crankshaft support bearing (17).

10. A high transmission ratio reducer according to claim 3, characterized in that: The end face of the output seat (12) is provided with a plurality of threaded holes (121) for connecting a load.

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