Single pendulum roller speed reducer

Abstract

The invention provides a solution for solving the defects in the background technology, and full-rolling transmission of the speed reducer is achieved. The transmission device is simple and compact in structure, and has the advantages of low abrasion, low noise, durability and high transmission efficiency. And due to full-rolling transmission, the potential of greatly improving the operation precision is achieved. The invention provides a brand-new way for realizing full-rolling transmission on the aspect of speed reducers, and provides a structural basis for exceeding the precision of existing like products. The speed reducer can be used in the forward direction or in the reverse direction, and is suitable for any mechanical equipment needing speed reduction or acceleration, especially high-precision equipment.

Description

Technical Field

[0001] The present invention relates to a speed reducer, belonging to the mechanical field. The present invention discloses a speed reducer with full rolling transmission. Background Art

[0002] There are various types of speed reducers, and most of them are gear transmissions. Even relatively precise speed reducers such as cycloidal pinwheel speed reducers or RV speed reducers do not achieve full rolling transmission. Summary of the Invention

[0003] The present invention proposes a solution to the deficiencies of the background art and realizes the full rolling transmission of the speed reducer. Its structure is simple and compact, and its advantages are low wear, low noise, long durability, and high transmission efficiency. Since it is a full rolling transmission, it has the potential to greatly improve the operating accuracy.

[0004] The present invention provides a brand-new way to achieve full rolling transmission in speed reducers and provides a structural basis for surpassing the accuracy of existing similar products. It can be used in the forward direction or the reverse direction and is applicable to any mechanical equipment that requires speed reduction or speed increase, especially high-precision equipment.

[0005] The single pendulum rolling speed reducer is composed of a base, rollers, an input shaft, a first drive ring, rolling balls, an intermediate shaft, a second drive ring, double-stage rollers, an output shaft, and an end cover.

[0006] The base is provided with a central hole, a base roller groove, a base pin shaft hole, an internal cycloid gear, and a screw hole.

[0007] A week of rollers with the same number as the base pin shaft holes are distributed in the base roller groove, and the rollers are fixed on the base pin shaft holes through pin shafts.

[0008] The roller is a needle roller bearing and is located in the base roller groove and the drive ring roller groove. It is composed of a pin shaft, needle rollers, and an outer ring, and it uses a pin shaft to replace the conventional inner ring. It is fixed on the base pin shaft hole and the drive ring pin shaft hole through the pin shaft respectively.

[0009] The input shaft is provided with a first dynamic balance and a first eccentric neck, and the input shaft is sleeved in the base central hole through a bearing.

[0010] The first drive ring is provided with an external cycloid gear and a drive ring spherical socket, and the first drive ring is sleeved on the first eccentric neck through a bearing.

[0011] The intermediate shaft is provided with a second eccentric neck, a second dynamic balance, and an intermediate shaft spherical socket. The intermediate shaft is sleeved on the base outward through a bearing and sleeved on the input shaft inward through a bearing.

[0012] Rolling balls are arranged between the drive ring spherical socket and the intermediate shaft spherical socket.

[0013] The second drive ring is provided with a drive ring roller groove, a drive ring pin shaft hole and a drive ring socket, and the second drive ring is sleeved on the second eccentric neck through a bearing.

[0014] The output shaft is provided with an output shaft socket, and the output shaft is sleeved on the intermediate shaft through a bearing.

[0015] Double-stage rollers are arranged between the drive ring socket and the output shaft socket.

[0016] The end cover is sleeved on the output shaft through a bearing and is fixed on the screw hole of the base through a connection hole and a fastener.

[0017] When the input shaft rotates clockwise with the driver, the first eccentric neck drives the first drive ring to operate through a bearing. At this time, the rollers distributed in the base roller groove roll on the surface of the epicycloid wheel on the first drive ring. Therefore, the first drive ring makes an eccentric rotary motion in the counterclockwise direction with less resistance under the combined action of the first eccentric neck and the rollers.

[0018] On the corresponding surfaces of the first drive ring and the intermediate shaft, a week of drive ring ball sockets and intermediate shaft ball sockets with the same quantity, size and distribution diameter are distributed. When the first drive ring makes an eccentric rotary motion, the drive ring ball socket also makes an eccentric rotary motion around the intermediate shaft ball socket. In this way, while rubbing the rolling balls therein, it drives the intermediate shaft to rotate counterclockwise.

[0019] With the rotation of the intermediate shaft, the second eccentric neck thereon drives the second drive ring to move through a bearing. At the same time, the rollers in the drive ring roller groove roll along the surface of the hypocycloid wheel. Therefore, the second drive ring makes an eccentric rotary motion in the clockwise direction with less resistance under the combined action of the second eccentric neck and the rollers.

[0020] On the corresponding surfaces of the second drive ring and the output shaft, a week of drive ring sockets and output shaft sockets with the same quantity, size and distribution diameter are distributed. When the second drive ring makes an eccentric rotary motion, the drive ring socket also makes an eccentric rotary motion around the output shaft socket. In this way, while rubbing the double-stage rollers therein, it drives the output shaft to rotate clockwise.

[0021] The ball socket transmission structure composed of the drive ring ball socket, the rolling balls and the intermediate shaft ball socket. The drive ring ball socket and the intermediate shaft ball socket are both the same spherical ring grooves. The spherical diameter of the spherical ring groove is the same as the diameter of the rolling balls therein, and the rolling balls can roll freely and accurately along the global spherical groove. The ball socket transmission structure can make the eccentric rotary motion of the first drive ring return to the circular motion of the intermediate shaft and achieve rolling transmission with high reliability and good stability. The rolling balls in the ball socket transmission structure are like the steel balls in the ball bearing. The force on any point of the rolling balls will be transmitted to the corresponding point in the diameter direction, having good adaptability.

[0022] A tableting transmission structure composed of a driving ring tableting, a double-table roller, and an output shaft tableting. Both the driving ring tableting and the output shaft tableting are concave table configurations of the same size, and the inclination angle of the concave table circular surface is the same as that of the circular table surface of the double-table roller. The double-table roller can roll freely in the concave table. The tableting transmission structure can return the eccentric rotary motion of the second driving ring to the circular motion of the output shaft and achieve rolling transmission. The cross-section of the double-table roller is hexagonal with opposite sides parallel, and the connection of the opposite sides plus the two ends forms a rectangle, which can transfer the force to the opposite side to the maximum extent under the condition of force on one side and has a large load capacity.

[0023] The speed reducer of the present invention is actually a speed reducer with a two-stage structure. The reason is that compared with a gear speed reducer, the roller occupies a large space and has a small distribution density, resulting in a small transmission ratio. A two-stage or higher-stage structure can obtain a large transmission ratio. The two-stage small transmission ratio structure is smaller in volume, occupies less space, is lighter in weight than the single-stage large transmission ratio structure, and can magnify the transmission ratio in a geometric progression.

[0024] Such a two-stage structure can exist alone or be combined together according to actual needs. The difference in their structures lies in that one features an external cycloid gear drive and the other features an internal cycloid gear drive. Brief Description of the Drawings

[0025] Figure 1 is the appearance, Figure 2 is the three-dimensional cross-section, Figure 3 is the longitudinal cross-section, Figure 4 is the base cross-section, Figure 5 is the roller, Figure 6 is the input shaft, Figure 7 is the first driving ring, Figure 8 is the rolling ball, Figure 9 is the intermediate shaft, Figure 10 is the second driving ring, Figure 11 is the double-table roller, Figure 12 is the output shaft, Figure 13 is the end cover. Detailed Implementation Modes

[0026] The present invention will be described below in conjunction with the drawings of the specification.

[0027] The single-pendulum rolling speed reducer is composed of a base (1), a roller (2), an input shaft (3), a first driving ring (4), a rolling ball (5), an intermediate shaft (6), a second driving ring (7), a double-table roller (8), an output shaft (9), and an end cover (10).

[0028] The base (1) has a central hole (1-1), a base roller groove (1-2), a base pin shaft hole (1-3), an internal cycloid gear (1-4)+, and a screw hole (1-5).

[0029] A week of rollers (2) with the same number as the base pin holes (1-3) are distributed in the base roller groove (1-2).

[0030] The roller (2) is composed of a pin shaft (2-1), a needle roller (2-2) and an outer ring (2-3), and is fixed on the base pin hole (1-3) through the pin shaft (2-1).

[0031] The roller (2) is a needle roller bearing, located in the base roller groove (1-2) and the drive ring roller groove (7-1). It is composed of a pin shaft (2-1), a needle roller (2-2) and an outer ring (2-3). It replaces the conventional inner ring with the pin shaft (2-1). It is fixed on the base pin hole (1-3) and the drive ring pin hole (7-2) through the pin shaft (2-1).

[0032] The input shaft (3) has a first dynamic balance (3-1) and a first eccentric neck (3-2), and the input shaft (3) is sleeved with the base center hole (1-1) through a bearing.

[0033] The first drive ring (4) has an external cycloid gear (4-1) and a drive ring spherical socket (4-2), and the first drive ring (4) is sleeved on the first eccentric neck (3-2) through a bearing.

[0034] The intermediate shaft (6) has a second eccentric neck (6-1), a second dynamic balance (6-2) and an intermediate shaft spherical socket (6-3). The intermediate shaft (6) is sleeved on the base outward through a bearing and on the input shaft inward through a bearing.

[0035] A rolling ball (5) is arranged between the drive ring spherical socket (4-2) and the intermediate shaft spherical socket (6-3).

[0036] The second drive ring (7) has a drive ring roller groove (7-1), a drive ring pin hole (7-2) and a drive ring table socket (7-3), and the second drive ring (7) is sleeved on the second eccentric neck (6-1) through a bearing.

[0037] The output shaft (9) has an output shaft table socket (9-1), and the output shaft (9) is sleeved on the intermediate shaft (6) through a bearing.

[0038] A double table roller (8) is arranged between the drive ring table socket (7-3) and the output shaft table socket (9-1).

[0039] The end cover (10) is sleeved with the output shaft (9) through a bearing, and is fixed on the screw hole (1-5) of the base (1) through the connection hole (10-1) and a fastener.

[0040] When the input shaft (3) rotates clockwise with the driver, the first eccentric neck (3-2) drives the first drive ring (4) to operate through the bearing. At this time, the rollers (2) distributed in the base roller groove (1-2) roll on the surface of the epicycloid wheel (4-1) on the first drive ring (4). Therefore, under the combined action of the first eccentric neck (3-2) and the rollers (2), the first drive ring (4) makes an eccentric rotary motion in the counterclockwise direction with less resistance.

[0041] On the corresponding surfaces of the first drive ring (4) and the intermediate shaft (6), a week of drive ring spherical sockets (4-2) and intermediate shaft spherical sockets (6-3) with the same quantity, size and distribution diameter are distributed. When the first drive ring (4) makes an eccentric rotary motion, the drive ring spherical sockets (4-2) also make an eccentric rotary motion around the intermediate shaft spherical sockets (6-3). In this way, while rubbing the rolling balls (5) among them, the intermediate shaft (6) is driven to rotate in the counterclockwise direction.

[0042] With the rotation of the intermediate shaft (6), the second eccentric neck (6-1) on it drives the second drive ring (7) to operate through the bearing. At the same time, the rollers (2) in the drive ring roller groove (7-1) roll along the surface of the hypocycloid wheel (1-4). Therefore, under the combined action of the second eccentric neck (6-1) and the rollers (2), the second drive ring (7) makes an eccentric rotary motion in the clockwise direction with less resistance.

[0043] On the corresponding surfaces of the second drive ring (7) and the output shaft (9), a week of drive ring table sockets (7-3) and output shaft table sockets (9-1) with the same quantity, size and distribution diameter are distributed. When the second drive ring (7) makes an eccentric rotary motion, the drive ring table sockets (7-3) also make an eccentric rotary motion around the output shaft table sockets (9-1). In this way, while rubbing the double table rollers (8) among them, the output shaft (9) is driven to rotate in the clockwise direction.

[0044] The spherical socket transmission structure composed of the drive ring spherical sockets (4-2), the rolling balls (5) and the intermediate shaft spherical sockets (6-3). The drive ring spherical sockets (4-2) and the intermediate shaft spherical sockets (6-3) are both the same spherical ring grooves. The spherical diameter of the spherical ring grooves is the same as the diameter of the rolling balls (5) among them. The rolling balls (5) can roll freely and accurately along the global spherical grooves. The spherical socket transmission structure can make the eccentric rotary motion of the first drive ring (4) return to the circular motion of the intermediate shaft (6) and achieve rolling transmission with high reliability and good stability. The rolling balls (5) in the spherical socket transmission structure are like the steel balls in the ball bearing. Any point of the rolling balls (5) is stressed and will be transmitted to the corresponding point in the diameter direction, with good adaptability.

[0045] The table groove transmission structure composed of the driving ring table groove (7-3), the double table roller (8) and the output shaft table groove (9-1). Both the driving ring table groove (7-3) and the output shaft table groove (9-1) are concave table configurations of the same size. The inclination angle of the concave table circular surface is the same as that of the circular table surface of the double table roller (8), and the double table roller (8) can freely roll in the concave groove. The table groove transmission structure can return the eccentric rotary motion of the second driving ring (7) to the circular motion of the output shaft (9) and achieve rolling transmission. The cross-section of the double table roller (8) is hexagonal and the opposite sides are parallel. The connection of the opposite sides plus the two ends forms a rectangle, which can transfer the force on one side to the opposite side to the greatest extent under the condition of force on one side, and has a large load capacity.

Claims

1. The main structure of a single pendulum rolling reducer includes: a base (1), rollers (2), an input shaft (3), a first drive ring (4), rolling balls (5), an intermediate shaft (6), a second drive ring (7), double rollers (8), an output shaft (9), and end covers (10).

2. The base (1), roller (2), input shaft (3) and first drive ring (4) according to claim 1, characterized in that: The outer pendulum rolling structure composed of the base (1), the rollers (2) fixed thereon, the first eccentric neck (3-2) on the input shaft (3), and the first drive ring (4) constitutes the main functional structure of the first-stage reduction.

3. The inner base (1), roller (2), intermediate shaft (6) and second drive ring (7) according to claim 1, characterized in that: The inner pendulum rolling structure composed of the inner cycloid gear (1-4) on the base (1), the second drive ring (7), the rollers (2) thereon, and the second eccentric neck (6-1) on the intermediate shaft (6) constitutes the main functional structure of the second-stage reduction.

4. The first drive ring (4), rolling balls (5) and intermediate shaft (6) according to claim 1, characterized in that: The ball socket transmission structure composed of the drive globe socket (4-2), the rolling balls (5), and the intermediate shaft ball socket not only realizes the return of the eccentric rotary motion to the circular motion but also realizes the rolling transmission.

5. The second drive ring (7), double-stage roller (8) and output shaft (9) according to claim 1, characterized in that: The socket transmission structure composed of the drive ring socket (7-3), the double rollers (8), and the output shaft socket not only realizes the return of the eccentric rotary motion to the circular motion but also realizes the rolling transmission.

6. The double table roller (8) according to claim 1, characterized in that: The longitudinal section of the double rollers (8) is hexagonal and the opposite sides are parallel to each other. The connection lines at both ends of the opposite sides form a square, which can transfer the force on one side to the opposite side to the greatest extent.

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