High-reliability speed reducer with double-input differential structure

Abstract

The invention aims at the technical field of mechanical transmission, and provides a double-input differential structure high-reliability speed reduction device which comprises a first motor, a second motor, an output shaft and a speed reduction component. A first motor and a second motor are symmetrically and fixedly connected to two side surfaces of the lower part of the speed reducing part; the upper part of the speed-reducing part and the first motor are rotationally connected with an output shaft through a bearing. By the adoption of the double-motor high-margin design, when any input component in the speed reducer is damaged or breaks down, the other input mechanism can still input rotating speed and power, normal operation of the mechanisms is not affected, the service life of the speed reducer can be prolonged, and the speed reducer has the advantage of being high in reliability; and mechanism vibration caused by unbalance loading of the structure is reduced.

Description

Technical Field

[0001] The invention relates to a high-reliability speed reducer with a dual-input differential structure, belonging to the technical field of mechanical transmission. Background Art

[0002] A reducer is a mechanical device used to reduce the output speed of a rotating machine and increase the output torque. It is usually composed of a set of gears, and the speed conversion between the input shaft and the output shaft is achieved through the gear ratio and size matching. For a conventional reducer, the basic structure generally has an input structure and an output structure. The input structure is usually an input shaft, which is responsible for receiving the rotational force of an external power source (such as an electric motor) and transmitting it to the gear system inside the reducer. The output structure outputs the power of the reducer after speed conversion to the required equipment or mechanical device through the output shaft. The Chinese utility model patent with patent number CN200420066871.5 discloses a motor reducer including a worm-helical gear reducer, which can solve the problem of axial displacement of the inner ring of the bearing, so that the bearing can be more reliably fixed on the worm shaft; the Chinese utility model patent with patent number CN201921322595.7 discloses a gear reducer device with a dustproof function, which can lubricate the gear reducer without disassembling the housing, avoiding a large amount of dust from entering.

[0003] However, the inventors of the present invention have found that the prior art has the following problems: in places where maintenance is not possible or where maintenance is costly, such as special fields such as aerospace, aviation, deep sea, and ocean, when conventional reduction gears have mechanical failures such as broken gear teeth, pitting corrosion on the tooth surface, bonding on the tooth surface, and electrical failures, the power input end of the reduction gear cannot transmit power and the output end will have no response, affecting the implementation of the project. Therefore, high-reliability reduction gears are particularly important. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a high-reliability reduction gear device with a dual-input differential structure. The high-reliability reduction gear device with a dual-input differential structure adopts a dual-motor high-margin design and has the characteristics of high reliability.

[0005] The present invention is achieved through the following technical solutions.

[0006] The present invention provides a high-reliability reduction gear device with a dual-input differential structure, comprising a first motor, a second motor, an output shaft and a reduction component; the first motor and the second motor are symmetrically and fixedly connected on both sides of the lower part of the reduction component; the output shaft is rotatably connected to the same side of the first motor as the upper part of the reduction component through a bearing.

[0007] The deceleration component comprises a shell, a deceleration member and an output member; the deceleration member is rotatably connected to the middle part of the shell inner cavity; the output member is rotatably connected to the upper part of the shell inner cavity, and the deceleration member is meshingly connected to the output member.

[0008] The deceleration component includes a connecting shaft, a first connecting shaft fixed bearing, a second connecting shaft fixed bearing, a differential gear and a first differential gear fixed bearing; one end of the connecting shaft is rotatably connected to the housing through the first connecting shaft fixed bearing, and the other end is rotatably connected to the end cover through the second connecting shaft fixed bearing; the differential gear is rotatably connected to the connecting shaft through the first differential gear fixed bearing and the second differential gear fixed bearing.

[0009] The deceleration component also includes a second differential gear fixed bearing, a first double gear, a second double gear and a second double gear fixed bearing; the first double gear and the second double gear are symmetrically arranged on both sides of the differential gear, and the first double gear is rotatably connected to the connecting shaft through the first double gear fixed bearing, and the second double gear is rotatably connected to the connecting shaft through the second double gear fixed bearing.

[0010] The deceleration component also includes a planetary gear fixed bearing, a planetary column and a planetary gear; the planetary column is rotationally connected with the planetary gear through the planetary gear fixed bearing; and the planetary gear is a bevel gear.

[0011] The planetary column is fixed in the cross-shaped through groove on the side of the differential gear by the planetary column fixing screw; the planetary gear is meshed and connected with the first duplex gear and the second duplex gear at the same time.

[0012] The output component includes an output shaft, a second output shaft fixed bearing, a first output shaft fixed bearing, an output gear and a second key; one end of the output shaft is rotatably connected to the end cover through the second output shaft fixed bearing; the other side of the output shaft is rotatably connected to the housing through the first output shaft fixed bearing; the output gear is connected to the output shaft key through the second key.

[0013] The output gear is meshingly connected with the differential gear.

[0014] The deceleration component also includes a first motor gear, a first key, a second motor gear and a third key; the first motor output shaft is key-connected to the first motor gear via the first key; the first motor gear is meshingly connected to the first double gear; the second motor output shaft is key-connected to the second motor gear via the third key; the second motor gear is meshingly connected to the second double gear.

[0015] The end cover is connected to the housing thread through the housing motor connecting screw

[0016] The beneficial effect of the present invention is that by adopting a dual-motor high-margin design, if any input component in the reduction device is damaged or fails, the other input mechanism can still input rotational speed and power, which will not affect the normal operation of the mechanism, can increase the service life of the reducer, and has the characteristics of high reliability. At the same time, the dual input structure is a symmetrical structure, which reduces the mechanism vibration caused by structural overload. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an axonometric view of the appearance of the present invention;

[0018] Figure 2 is a half-section view of the present invention;

[0019] Figure 3 is an exploded view of the present invention;

[0020] Figure 4 It is a structural diagram of the parts hidden behind the shell and the end cover in the present invention.

[0021] In the figure: 1-first motor, 2-first motor gear, 3-first key, 4-first duplex gear, 5-connecting shaft, 6-first connecting shaft fixed bearing, 7-first duplex gear fixed bearing, 8-first differential gear fixed bearing, 9-differential gear, 10-planetary gear fixed bearing, 11-output gear, 12-output shaft, 13-first output shaft fixed bearing, 14-housing, 15-housing motor connecting screw, 16-second key, 17-second output shaft fixed bearing, 18-end cover, 19-planetary column, 20-planetary gear, 21-planetary column fixing screw, 22-second differential gear fixed bearing, 23-shaft retaining ring, 24-second duplex gear fixed bearing, 25-second connecting shaft fixed bearing, 26-second duplex gear, 27-second motor gear, 28-third key, 29-second motor, 30-deceleration component, 31-deceleration member, 32-output member. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described below, but the scope of protection claimed is not limited to the description.

[0023] The first embodiment of the present invention relates to Figure 1-4 A high-reliability speed reduction device with a dual-input differential structure is shown, comprising a first motor 1, a second motor 29, an output shaft 12 and a speed reduction component 30; the first motor 1 and the second motor 29 are symmetrically fixedly connected to the two sides of the lower part of the speed reduction component 30; the output shaft 12 is rotatably connected to the same side of the first motor 1 through a bearing on the upper part of the speed reduction component 30. The first motor 1 and the second motor 29 provide power input; the output shaft 12 provides power output, and the speed reduction component 30 is used to transmit the power and speed of the first motor 1 and the second motor 29 to the output shaft 12.

[0024] The second embodiment of the present invention is basically the same as the first embodiment, mainly in that the deceleration component is optimized. The deceleration component 30 includes a housing 14, a deceleration member 31 and an output member 32; the deceleration member 31 is rotatably connected to the middle of the inner cavity of the housing 14; the output member 32 is rotatably connected to the upper inner cavity of the housing 14, and the deceleration member 31 is meshed with the output member 32. The housing 14 provides a supporting frame structure, while preventing pollution such as dust from entering the deceleration component 30; the deceleration member 31 transmits power and speed through the meshing connection of circular gears and the meshing connection of bevel gears; the output member 32 realizes power and speed output.

[0025] The deceleration member 31 includes a connecting shaft 5, a first connecting shaft fixed bearing 6, a second connecting shaft fixed bearing 25, a differential gear 9 and a first differential gear fixed bearing 8; one end of the connecting shaft 5 is rotatably connected to the housing 14 through the first connecting shaft fixed bearing 6, and the other end is rotatably connected to the end cover 18 through the second connecting shaft fixed bearing 25; the differential gear 9 is rotatably connected to the connecting shaft 5 through the first differential gear fixed bearing 8 and the second differential gear fixed bearing 22. The connecting shaft 5 provides rotational force support for the differential gear 9, the first double gear 4 and the second double gear 26; the first connecting shaft fixed bearing 6 and the second connecting shaft fixed bearing 25 ensure that the connecting shaft 5 rotates smoothly; the differential gear 9 is used to transmit the torque of the first motor 1 and the second motor 29; the shaft clamp 23 installed on the connecting shaft 5 can limit the second differential gear fixed bearing 22 and the second connecting shaft fixed bearing 25.

[0026] The deceleration member 31 further includes a second differential gear fixed bearing 22, a first double gear 4, a second double gear 26 and a second double gear fixed bearing 24; the first double gear 4 and the second double gear 26 are symmetrically arranged on both sides of the differential gear 9, and the first double gear 4 is rotatably connected to the connecting shaft 5 through the first double gear fixed bearing 7, and the second double gear 26 is rotatably connected to the connecting shaft 5 through the second double gear fixed bearing 24. The first double gear 4 and the second double gear 26 are both composed of a spur gear and a bevel gear fixedly connected; the first double gear fixed bearing 7 ensures that the first double gear 4 rotates smoothly; the second double gear fixed bearing 24 ensures that the second double gear 26 rotates smoothly.

[0027] The deceleration member 31 further includes a planetary gear fixed bearing 10, a planetary column 19 and a planetary gear 20; the planetary column 19 is rotatably connected to the planetary gear 20 through the planetary gear fixed bearing 10; the planetary gear 20 is a bevel gear. The planetary column 19 plays a role of force and rotation support for the planetary gear 20; the planetary gear fixed bearing 10 ensures that the planetary gear 20 rotates smoothly.

[0028] The planetary column 19 is fixed in the cross-shaped through groove on the side of the differential gear 9 by the planetary column fixing screw 21; the planetary gear 20 is meshed and connected with the first duplex gear 4 and the second duplex gear 26 at the same time, that is, the first duplex gear 4 and the second duplex gear 26 can drive the differential gear 9 individually or together, ensuring that there is always a power drive.

[0029] The third embodiment of the present invention is basically the same as the first embodiment, mainly in further optimization. The output member 32 includes a second output shaft fixed bearing 17, a first output shaft fixed bearing 13, an output gear 11 and a second key 16; one end of the output shaft 12 is rotatably connected to the end cover 18 through the second output shaft fixed bearing 17; the other side of the output shaft 12 is rotatably connected to the housing 14 through the first output shaft fixed bearing 13; the output gear 11 is key-connected to the output shaft 12 through the second key 16. The output gear 11 receives power transmission to drive the output shaft 12 to rotate, and the second key 16 is used for limiting and force, which can ensure that the output shaft 12 rotates synchronously with the output gear 11. The second output shaft fixed bearing 17 and the first output shaft fixed bearing 13 can make the output shaft 12 rotate more smoothly.

[0030] The output gear 11 is meshedly connected with the differential gear 9 to ensure that the power and speed of the output gear 11 can be transmitted to the differential gear 9 .

[0031] The deceleration component 30 further includes a first motor gear 2, a first key 3, a second motor gear 27 and a third key 28; the output shaft of the first motor 1 is key-connected with the first motor gear 2 through the first key 3; the first motor gear 2 is meshed with the first double gear 4; the output shaft of the second motor 29 is key-connected with the second motor gear 27 through the third key 28; the second motor gear 27 is meshed with the second double gear 26. The first motor gear 2 is used to transmit the power of the first motor 1 to the first double gear 4; the second motor gear 27 is used to transmit the power of the second motor 29 to the second double gear 26; the first key 3 is used to ensure that the first motor gear 2 rotates synchronously with the output shaft of the first motor 1, and the third key 28 is used to ensure that the second motor gear 27 rotates synchronously with the output shaft of the second motor 29.

[0032] The end cover 18 is threadedly connected to the housing 14 through the housing motor connecting screws 15; after the end cover 18 is connected to the housing 14, a closed whole can be formed to ensure that the inner cavity is not polluted or damaged by external forces.

[0033] Based on the above, a typical working mode of the present invention is:

[0034] like Figure 1-4As shown, when the present invention is implemented, the first motor 1 and the second motor 29 rotate in opposite directions at the same time; take the first motor 1 rotating clockwise and the second motor 29 rotating counterclockwise as an example; at this time, the first motor gear 2 and the second motor gear 27 rotate in the same direction as the corresponding motors: the motor gear drives the first double gear 4 to rotate, and the first double gear 4 rotates in the opposite direction to the first motor gear 2, that is, counterclockwise; the motor gear drives the second double gear 26 to rotate, and the second double gear 26 rotates in the opposite direction to the second motor gear 27, that is, clockwise. The first duplex gear 4 and the second duplex gear 26 are symmetrical with the differential gear 9. Looking down from the end cover, the second duplex gear 26 rotates counterclockwise; the first duplex gear 4 rotates counterclockwise to drive the planetary gear 20 to rotate clockwise. At the same time, looking down from the end cover, the second duplex gear 26 rotates counterclockwise to drive the planetary gear 20 to rotate clockwise. The planetary gear 20 drives the differential gear 9 to rotate, and the differential gear 9 transmits the motion to the output gear 11. The output gear 11 rotates with the output shaft 12 at the same time, and the output shaft 12 rotates and reduces the speed, thereby achieving the purpose of deceleration and transmission of motion.

Claims

1. A high reliability speed reducer with a dual input differential structure, characterized in that: The invention comprises a first motor (1), a second motor (29), an output shaft (12) and a deceleration component (30); the first motor (1) and the second motor (29) are symmetrically and fixedly connected to the two sides of the lower part of the deceleration component (30); and the output shaft (12) is rotatably connected to the upper part of the deceleration component (30) on the same side as the first motor (1) via a bearing.

2. The high reliability reduction gear device with dual input differential structure as claimed in claim 1, characterized in that: The deceleration component (30) comprises a shell (14), a deceleration member (31) and an output member (32); the deceleration member (31) is rotatably connected to the middle part of the inner cavity of the shell (14); the output member (32) is rotatably connected to the upper part of the inner cavity of the shell (14), and the deceleration member (31) is meshingly connected to the output member (32).

3. The high reliability reduction gear device with dual input differential structure as claimed in claim 2, characterized in that: The deceleration component (31) comprises a connecting shaft (5), a first connecting shaft fixed bearing (6), a second connecting shaft fixed bearing (25), a differential gear (9) and a first differential gear fixed bearing (8); one end of the connecting shaft (5) is rotatably connected to the housing (14) via the first connecting shaft fixed bearing (6), and the other end is rotatably connected to the end cover (18) via the second connecting shaft fixed bearing (25); the differential gear (9) is rotatably connected to the connecting shaft (5) via the first differential gear fixed bearing (8) and the second differential gear fixed bearing (22).

4. The high reliability reduction gear device with dual input differential structure as claimed in claim 2, characterized in that: The deceleration component (31) further comprises a second differential gear fixed bearing (22), a first double gear (4), a second double gear (26) and a second double gear fixed bearing (24); the first double gear (4) and the second double gear (26) are symmetrically arranged on both sides of the differential gear (9), and the first double gear (4) is rotationally connected to the connecting shaft (5) through the first double gear fixed bearing (7), and the second double gear (26) is rotationally connected to the connecting shaft (5) through the second double gear fixed bearing (24).

5. The high reliability reduction gear device with dual input differential structure as claimed in claim 2, characterized in that: The deceleration component (31) further comprises a planetary gear fixing bearing (10), a planetary column (19) and a planetary gear (20); the planetary column (19) is rotationally connected to the planetary gear (20) via the planetary gear fixing bearing (10); and the planetary gear (20) is a bevel gear.

6. The high reliability reduction gear device with double input differential structure as claimed in claim 5, characterized in that: The planetary column (19) is fixed in a cross-shaped through groove on the side of the differential gear (9) by means of a planetary column fixing screw (21); the planetary gear (20) is meshedly connected with the first duplex gear (4) and the second duplex gear (26) at the same time.

7. The high reliability reduction gear device with dual input differential structure as claimed in claim 2, characterized in that: The output member (32) comprises an output shaft (12), a second output shaft fixed bearing (17), a first output shaft fixed bearing (13), an output gear (11) and a second key (16); one end of the output shaft (12) is rotatably connected to the end cover (18) via the second output shaft fixed bearing (17); the other side journal of the output shaft (12) is rotatably connected to the housing (14) via the first output shaft fixed bearing (13); and the output gear (11) is key-connected to the output shaft (12) via the second key (16).

8. The high reliability reduction gear device with double input differential structure as claimed in claim 7, characterized in that: The output gear (11) is meshingly connected with the differential gear (9).

9. The high reliability reduction gear device with double input differential structure as claimed in claim 1, characterized in that: The deceleration component (30) further comprises a first motor gear (2), a first key (3), a second motor gear (27) and a third key (28); the output shaft of the first motor (1) is key-connected to the first motor gear (2) via the first key (3); the first motor gear (2) is meshingly connected to the first double gear (4); the output shaft of the second motor (29) is key-connected to the second motor gear (27) via the third key (28); the second motor gear (27) is meshingly connected to the second double gear (26).

10. The high reliability speed reducer with double input differential structure as claimed in claim 2, characterized in that: The end cover (18) is threadedly connected to the housing (14) via housing motor connecting screws (15).

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