Composite wandering star wheel

Abstract

The utility model discloses a composite wandering star wheel, which belongs to the technical field of design and manufacture of mechanical transmission devices, and comprises a central sun wheel, an inner gear ring, a composite wandering star wheel set, a planet carrier and a shell, the device is novel in design and ingenious, when the input shaft drives the center sun gear to rotate, the center sun gear drives the main wandering star gear meshed with the center sun gear to rotate, the main wandering star gear drives the auxiliary wandering star gear to revolve around the inner gear ring through the ball bearing, meanwhile, the main wandering star gear rotates, and the auxiliary wandering star gear is meshed with the inner gear ring; the combined wandering star wheel set integrally rolls along the inner gear ring, so that the planet carrier is driven to rotate, finally, power is transmitted to the output shaft through the bolts on the planet carrier, and the multi-stage meshing mode not only improves the transmission efficiency, but also effectively disperses contact stress, reduces abrasion and greatly improves the practicability of the device.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical transmission device design and manufacturing, and particularly relates to a composite sun-and-planet gear. BACKGROUND

[0002] At present, mechanical transmission systems are widely used in various types of mechanical equipment, especially in the fields of automobile gearboxes and industrial robots. Although traditional gear transmission has the advantages of simple structure and low cost, it is prone to wear and noise under high-speed operation and high load conditions, which affects the service life and performance of the equipment. In recent years, with the application of precision machining technology and new materials, new transmission devices have emerged, improving transmission efficiency and reliability, but also bringing new challenges such as complex design and high cost.

[0003] The specific solutions of the prior art include traditional gear transmission, which realizes power transmission by meshing two or more gears, has a simple structure and low cost, but is prone to wear and noise, and is not suitable for long-term high-load operation. Planetary gear transmission consists of a central sun gear, a planet carrier, and planet gears rotating around the sun gear, has high load capacity and transmission ratio range, and is suitable for high-torque transmission, but has a complex structure, high assembly difficulty, and high cost. Harmonic reducer uses the differential motion of flexible bearings and rigid gears to achieve speed reduction and torque increase, has the advantages of small size, light weight, and high transmission efficiency, but due to material limitations, its service life is short and maintenance cost is high.

[0004] Therefore, traditional gear transmission is prone to severe tooth surface wear under high rotational speed and heavy load, which reduces transmission accuracy and service life. Although planetary gear transmission has strong load capacity, its complex structure increases manufacturing and assembly difficulty and has relatively high cost. Although the harmonic reducer is compact and efficient, its core component, the flexspline, is under great stress and will be damaged by fatigue after long-term use, requiring frequent maintenance and increasing cost.

[0005] Therefore, the present application proposes a composite sun-and-planet gear. CONTENT OF THE INVENTION

[0006] The composite sun-and-planet gear proposed by the present application solves the problems in the background technology. When the input shaft drives the central sun gear to rotate, the central sun gear drives the primary sun-and-planet gear to rotate, which in turn drives the secondary sun-and-planet gear to revolve around the inner ring gear through the ball bearing, and the secondary sun-and-planet gear also rotates itself. The secondary sun-and-planet gear meshes with the inner ring gear, making the composite sun-and-planet gear set roll along the inner ring gear as a whole, thereby driving the planet carrier to rotate, and finally transmitting power to the output shaft through the bolts on the planet carrier. This multi-stage meshing method not only improves transmission efficiency but also effectively disperses contact stress and reduces wear, greatly improving the practicality of the device.

[0007] In order to achieve the above object, the application adopts the following technical scheme:

[0008] A composite planet wheel, comprising a central sun gear, an inner ring gear, a composite planet wheel set, a planet carrier and an outer shell, the central sun gear is located in the center of the whole mechanism and is connected with the input shaft through a key groove, the inner ring gear is arranged on the outer shell to form a closed space, and the composite planet wheel set is composed of a plurality of composite planet wheels.

[0009] As a preferred embodiment, each composite planet wheel is composed of a primary planet wheel and a secondary planet wheel, wherein the primary planet wheel is engaged with the central sun gear, and the secondary planet wheel is engaged with the inner ring gear.

[0010] The primary planet wheel is driven to rotate by the central sun gear, and the primary planet wheel drives the secondary planet wheel to revolve around the inner ring gear through the ball bearing, and the secondary planet wheel is engaged with the inner ring gear to make the composite planet wheel set roll along the inner ring gear, thereby driving the planet carrier to rotate, thereby improving the practicability of the device.

[0011] As a preferred embodiment, the planet carrier is used to support the composite planet wheel set to ensure stable rotation, one end of the planet carrier is connected with the output shaft through a bolt, and the other end is fixed with the outer shell.

[0012] The secondary planet wheel is engaged with the inner ring gear to make the composite planet wheel set roll along the inner ring gear, thereby driving the planet carrier to rotate, and finally the power is transmitted to the output shaft through the bolt on the planet carrier, and this multi-stage engagement mode not only improves the transmission efficiency, but also effectively disperses the contact stress and reduces the wear, thereby improving the practicability of the device.

[0013] As a preferred embodiment, each primary planet wheel and secondary planet wheel are connected through a ball bearing.

[0014] The primary planet wheel and the secondary planet wheel are connected through a ball bearing to reduce friction resistance and improve transmission efficiency, the ball bearing is a deep groove ball bearing with good self-lubricating performance and long service life, thereby improving the practicability of the device.

[0015] As a preferred embodiment, an elastic gasket is additionally arranged between the primary planet wheel and the secondary planet wheel of the composite planet wheel set.

[0016] An elastic gasket is additionally arranged between the primary planet wheel and the secondary planet wheel of the composite planet wheel set, the gasket is made of high-performance rubber and can absorb impact and vibration to some extent and reduce wear, thereby improving the practicability of the device.

[0017] As a preferred embodiment, temperature sensors and pressure sensors are arranged on the planet carrier to monitor the running state of the transmission system in real time.

[0018] By setting temperature sensors and pressure sensors on the planet carrier, the running state of the transmission system is monitored in real time, potential faults are found in time, the predictability of maintenance is improved, and the practicability of the device is improved.

[0019] The beneficial effects of the present application are:

[0020] 1. When the input shaft drives the central sun gear to rotate, the central sun gear drives the main star wheel engaged with it to rotate, and the main star wheel drives the secondary star wheel to revolve around the inner ring through the ball bearing, and at the same time, the secondary star wheel also rotates itself, the secondary star wheel is engaged with the inner ring, the whole composite star wheel set rolls along the inner ring, thereby driving the planet carrier to rotate, and finally the power is transmitted to the output shaft through the bolts on the planet carrier. This multi-stage meshing method not only improves the transmission efficiency, but also effectively disperses the contact stress and reduces the wear, greatly improving the practicability of the device.

[0021] 2. In order to further improve the reliability and durability of the transmission system, an elastic gasket is added between the main star wheel and the secondary star wheel of the composite star wheel set, which is made of high-performance rubber and can absorb impact and vibration to some extent and reduce wear. In addition, temperature sensors and pressure sensors are arranged on the planet carrier to monitor the running state of the transmission system in real time, discover potential faults in time, improve the predictability of maintenance, and greatly improve the practicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic view of the engagement of the secondary star wheel of the device with the inner ring.

[0023] Figure 2 It is a schematic view of the engagement of the main star wheel of the device with the central sun gear.

[0024] Figure 3 It is a schematic view of the connection of the planet carrier of the device.

[0025] Figure 4 It is a schematic view of the connection of the planet carrier of the device. Figure 3 It is an enlarged view of A in the present application.

[0026] Reference numerals in the figure: 1, central sun gear; 2, inner ring; 3, composite star wheel set; 31, composite star wheel; 311, main star wheel; 312, secondary star wheel; 4, planet carrier; 5, ball bearing; 6, elastic gasket; 7, temperature sensor; 8, pressure sensor; 9, outer shell. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0028] Referring to Figures 1-4 A composite planet wheel comprises a central sun gear 1, an inner ring gear 2, a composite planet wheel set 3, an planet carrier 4 and an outer shell 9. The central sun gear 1 is located in the center of the whole mechanism and is connected with an input shaft through a key groove. The inner ring gear 2 is arranged on the outer shell 9 to form a closed space. The composite planet wheel set 3 is composed of a plurality of composite planet wheels 31.

[0029] Referring to Figures 1-4 Each composite planet wheel 31 is composed of a main planet wheel 311 and a sub-planet wheel 312. The main planet wheel 311 is engaged with the central sun gear 1, and the sub-planet wheel 312 is engaged with the inner ring gear 2. The main planet wheel 311 is driven to rotate by the central sun gear 1, and the main planet wheel 311 drives the sub-planet wheel 312 to revolve around the inner ring gear 2 through a ball bearing 5, and the sub-planet wheel 312 is engaged with the inner ring gear 2 to make the composite planet wheel set 3 roll along the inner ring gear 2 as a whole, thereby driving the planet carrier 4 to rotate, so that the practicability of the device is improved.

[0030] Referring to Figures 1-4 The planet carrier 4 is used for supporting the composite planet wheel set 3 to ensure stable rotation. One end of the planet carrier 4 is connected with an output shaft through a bolt, and the other end is fixed with the outer shell 9. The composite planet wheel set 3 rolls along the inner ring gear 2 as a whole through the engagement between the sub-planet wheel 312 and the inner ring gear 2, thereby driving the planet carrier 4 to rotate, and finally transmitting power to the output shaft through the bolt on the planet carrier 4. This multi-stage engagement mode not only improves the transmission efficiency, but also effectively disperses the contact stress and reduces the wear, thereby improving the practicability of the device.

[0031] Referring to Figures 1-4 Each main planet wheel 311 and sub-planet wheel 312 is connected through a ball bearing 5. The ball bearing 5 is selected as a deep groove ball bearing, which has good self-lubricating performance and long service life, thereby improving the practicability of the device.

[0032] Referring to Figures 1-4 A layer of elastic gasket 6 is additionally arranged between the main planet wheel 311 and the sub-planet wheel 312 of the composite planet wheel set 3. The gasket is made of high-performance rubber and can absorb impact and vibration to some extent and reduce wear, thereby improving the practicability of the device.

[0033] The temperature sensor 7 and the pressure sensor 8 are arranged on the planet carrier 4 to monitor the running state of the transmission system in real time.

[0034] Working principle: when the input shaft drives the central sun gear 1 to rotate, the central sun gear 1 drives the main star wheel 311 meshing with it to rotate, and the main star wheel 311 drives the secondary star wheel 312 to revolve around the inner ring gear 2 through the ball bearing 5, and at the same time, the secondary star wheel 312 also rotates itself, the secondary star wheel 312 meshes with the inner ring gear 2, so that the composite star wheel set 3 rolls along the inner ring gear 2 as a whole, thereby driving the planet carrier 4 to rotate, and finally the power is transmitted to the output shaft through the bolts on the planet carrier 4, this multi-stage meshing mode not only improves the transmission efficiency, but also effectively disperses the contact stress and reduces the wear, in order to further improve the reliability and durability of the transmission system, an elastic gasket 6 is additionally arranged between the main star wheel 311 and the secondary star wheel 312 of the composite star wheel set 3, the gasket is made of high-performance rubber, which can absorb impact and vibration to a certain extent and reduce wear, in addition, the temperature sensor 7 and the pressure sensor 8 are arranged on the planet carrier 4 to monitor the running state of the transmission system in real time, so as to discover potential faults in time and improve the predictability of maintenance.

[0035] The central sun gear 1 is made of high-strength alloy steel material, and the hardness and wear resistance are enhanced through heat treatment; the inner ring gear 2 is made of cast iron material, and the surface is chrome plated to improve corrosion resistance and smoothness; the main star wheel 311 and the secondary star wheel 312 of the composite star wheel set 3 are both made of 45# steel and are quenched and tempered to ensure strength and toughness; the planet carrier 4 is made of aluminum alloy material to reduce the overall weight while maintaining sufficient rigidity.

[0036] Compared with the prior art, the technical scheme significantly improves the transmission efficiency of the transmission system, reduces energy loss, realizes higher energy utilization rate, greatly reduces wear and noise through multi-level meshing structure and reasonable material selection, prolongs the service life of the transmission system, simplifies the assembly process, reduces the production cost, and makes the transmission system more easily popularized and applied.

[0037] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A compound planetary gear wheel, comprising a center sun gear (1), an inner ring gear (2), a compound planetary gear wheel set (3), a planet carrier (4) and an outer shell (9), characterized in that, The center sun gear (1) is located in the center of the whole mechanism, connected with the input shaft through the key groove, the inner ring gear (2) is arranged on the shell (9), forming a closed space, the composite star wheel group (3) is composed of a plurality of composite star wheels (31).

2. A composite star wheel according to claim 1, wherein Each composite star wheel (31) is composed of a main star wheel (311) and a secondary star wheel (312), wherein the main star wheel (311) is engaged with the center sun gear (1), and the secondary star wheel (312) is engaged with the inner ring gear (2).

3. The composite star wheel of claim 1 wherein, The planet carrier (4) is used to support the composite star wheel group (3) and ensure its stable rotation, one end of the planet carrier (4) is connected with the output shaft through the bolt, and the other end is fixed with the shell (9).

4. The composite star wheel of claim 1 wherein, Each main star wheel (311) and secondary star wheel (312) is connected through the ball bearing (5).

5. The composite star wheel of claim 1 wherein, An elastic gasket (6) is additionally arranged between the main star wheel (311) and the secondary star wheel (312) of the composite star wheel group (3).

6. The composite star wheel of claim 1 wherein, The temperature sensor (7) and the pressure sensor (8) are arranged on the planet carrier (4) to monitor the running state of the transmission system in real time.

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