Multi-stage differential high-speed-ratio planetary gear speed reduction wheel

Abstract

A steel wheel is a mechanical part widely applied to the fields of hoisting machinery, railways, ports and the like, the driving of the wheel is mostly realized by adopting a motor, a speed reducer and a coupler, and the problems of large size of the speed reducer and complex installation of the part cause great trouble to design, manufacture and installation. Based on the principle of differential gear speed reduction, the novel differential speed reduction integrated wheel is developed, the characteristic that the transmission speed reduction ratio of a differential planetary gear speed reducer is large is utilized, the wheel serving as a rotating body is connected with a planet carrier, and integration of the speed reduction wheel is achieved. Therefore, the differential type planetary speed reduction wheel integrating bearing and speed reduction transmission is realized. The planetary differential speed reduction wheel has the remarkable advantages of being high in integration degree, large in transmission ratio, convenient to transport and install and the like, the equipment cost can be greatly reduced, and a solution which is more compact, capable of reducing the amount and high in cost performance is provided for driving and transmission of steel wheels in all industries.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical transmission, and in particular to a novel multi-stage differential large speed ratio planetary gear reduction wheel. Background Art

[0002] Among the precision reducers widely used in the current market, harmonic reducers and RV reducers have many unavoidable technical bottlenecks, which lead to significant defects such as difficulty in manufacturing, high cost, and short life for reducers used in industrial robots, further affecting the development of my country's industrial robot industry. In order to solve the above problems, the present invention is based on the characteristics of differential and planetary reducers, adopts the concept of innovative and integrated design to develop a differential planetary reduction wheel with large speed ratio, high load capacity, small size and high efficiency, providing a new optional solution for the high-end reducer industry and crane industry. Summary of the invention

[0003] Purpose of the invention: The present invention provides a reducer solution with multi-stage differential transmission, which can achieve high speed ratio transmission through the solution of multi-stage differential gear rotation.

[0004] Technical solution: The novel differential gear reducer is characterized in that: the reducer is composed of an input end gear shaft 1, an input end planetary carrier 2, a differential planetary gear 3, a differential gear ring 4, an active side support shaft 5, a wheel 6, a differential planetary gear 7, an output end planetary carrier 8, a passive side support shaft 9 and the like; when the reducer is working, the input end planetary carrier 2, the output end planetary carrier 8, the active side support shaft 5, the passive side support shaft 9 and the wheel 6 are relatively stationary, the input end gear shaft 1 is meshed with the differential planetary gear 3, and the differential planetary gear 3 is installed on the input end planetary carrier 2 , the differential planetary gear 3 and the differential ring gear 4 are internally meshed, so the input end gear 1 with a tooth number, the differential planetary gear 3, the differential ring gear with a tooth number and the input end planet carrier 2 constitute the first set of planetary transmission system; the differential ring gear 4 and the differential planetary gear 7 are meshed, the differential planetary gear 7 and the double gear shaft 1 are meshed, the differential planetary gear 7 is installed on the output end planet carrier 8, the orbital speed of the output end planet carrier 8 is the output speed, the input end gear 1 with a tooth number, the differential planetary gear set 7, the differential ring gear with a tooth number and the output end planet carrier 8 constitute the second set of planetary transmission system.

[0005] Wherein: the novel differential gear reducer realizes the input of speed and torque through an external motor, and realizes the output of power through the common revolution of the output end planetary carrier 8 and the input end planetary carrier 2.

[0006] Among them: the two ends of the input end gear shaft 1 are respectively constrained by bearings to constrain its axial displacement, and external gears with and numbers of teeth are processed in the middle of the two bearings. The number of teeth of the two gears can be the same or different.

[0007] The beneficial effects of the present invention are: compact structure, high transmission efficiency, and greatly improved transmission ratio without excessively increasing the size of the reducer; the special double planetary gear differential structure greatly reduces the difficulty of reducing the manufacturing of the reducer and significantly reduces the cost of the reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0009] Figure 1 It is the assembly drawing of multi-stage differential large speed ratio planetary gear reducer; Figure 2 It is a schematic diagram of a multi-stage differential large speed ratio planetary gear reducer model; Figure 3 It is an exploded schematic diagram of a multi-stage differential large speed ratio planetary gear reducer; Figure 4 It is a schematic diagram of the equal-axis side explosion of a multi-stage differential large-speed ratio planetary gear reducer.

[0010] Explanation of the accompanying drawings: In the figure, 1 is the input end gear shaft; 2 is the input end planetary carrier; 3 is the differential planetary gear; 4 is the differential ring gear; 5 is the active side support shaft; 6 is the wheel; 7 is the differential planetary gear; 8 is the output end planetary carrier; 9 is the passive side support shaft. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0012] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two parts. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0013] The purpose of the present invention is to provide a multi-stage differential large speed ratio planetary gear reduction wheel, which provides a new optional solution for the high-end reducer industry and the crane industry. The multi-stage differential large speed ratio planetary gear reduction wheel of the present invention is further described in detail below in conjunction with the accompanying drawings.

[0014] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The embodiment of the present invention provides a multi-stage differential high-speed ratio planetary gear reducer, which mainly includes an input end gear shaft 1, an input end planetary carrier 2, a differential planetary gear 3, a differential ring gear 4, an active side support shaft 5, a wheel 6, a differential planetary gear 7, an output end planetary carrier 8, and a passive side support shaft 9. The calculation method of the reducer transmission ratio is as follows: Assume that the speed at the input end of the reducer is , the output speed is , that is, the speed of the gear shaft 1 at the input end of the reducer is , the speed of the output planet carrier 8 is .

[0015] When the rotation directions of sun gears 1 and 4 are the same, the speed of sun gear 1 is Decompose into and , in Corresponding to the revolution of the planetary gear, the speed of the ring gear 1 is 0. Then: in The corresponding planetary gear revolution speed is 0, and the ring gear speed is .but: Known , , then the revolution speed of the planetary gear 7 is: Combining the above formulas, we can get: when When the rotation direction of sun gears 1 and 4 is opposite, the speed of sun gear 1 is Decompose into and ,in Corresponding to the revolution of the planetary gear, the speed of the ring gear 1 is 0. Then: in The corresponding planetary gear revolution speed is 0, and the ring gear speed is .but: Known, , then the revolution speed of the planetary gear 7 is: Combining the above formulas, we can get: To illustrate the large transmission ratio characteristics of the multi-stage differential transmission planetary reducer of the present invention, according to the reducer design parameters listed in Table 1, the transmission ratio of the reducer can be calculated using the above formula: Under the known design parameters, the reducer of the present invention can achieve a reduction transmission with a transmission ratio of , and the output direction of the reducer is opposite to the input direction.

[0016] Table 1 Known design parameters of reducer

Claims

1. The present invention discloses a multi-stage differential large speed ratio planetary gear reducer, which is composed of an input end gear shaft 1, an input end planet carrier 2, a differential planetary gear 3, a differential ring gear 4, an active side support shaft 5, a wheel 6, a differential planetary gear 7, an output end planet carrier 8, a passive side support shaft 9 (or an output end rotating body) and other accessory parts.

2. The input end gear shaft as claimed in claim 1, characterized in that The two ends of the shaft are respectively restrained by bearings to constrain the axial displacement, and the number of teeth is machined in the middle of the two bearings. and The external gear of the two gears has the same angular velocity as the input end motor, and the number of teeth of the two gears can be the same or different.

3. The differential planetary gear 3 according to claim 1, characterized in that Each planetary gear has a number of teeth. The input end gear is meshed with the differential ring gear 4, and the differential planetary gear 3 is connected to the input end planetary carrier 2 through a bearing.

4. The differential ring gear 4 according to claim 1, characterized in that Differential gear ring 4 is a floating gear ring, and the number of teeth on the inner side of the gear ring are and The internal gears of the two internal gears have the same angular velocity of rotation.

5. The differential planetary gear set 7 according to claim 1, characterized in that Each gear is connected to the output end planet carrier 8, and each gear can realize its free rotation through the bearing. Each gear has the same number of teeth. The input gear and number of teeth are Internal gear meshing.

6. The output end planet carrier 8 according to claim 1, characterized in that The rotation speed of the planet carrier is the output rotation speed of the reducer, and can be fixedly connected to the wheel 7 (or the output end rotating body) and the input end planet carrier 2 by mechanical connection.

7. A multi-stage differential high speed ratio planetary gear reducer, characterized in that There are two sets of differential planetary transmission systems and two sets of differential planetary transmission gears.

8. The two sets of differential planetary transmission gears as claimed in claim 7, characterized in that The number of teeth is The input gear and number of teeth are The differential gear ring rotates in the opposite direction, and uses the difference in speed to achieve differential reduction transmission.

9. A multi-stage differential high-speed ratio planetary gear reducer, characterized in that The transmission ratio of the reducer is shown in the formula:

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