Gear type stepless speed change and torque change transmission device

Abstract

The invention relates to a gear type stepless speed change and torque change transmission device, and belongs to the technical field of stepless speed change. The device is a planet combined mechanism and comprises a central sun gear, a planet gear, an adjusting planet gear, a planet carrier and a ring gear, the central sun gear is meshed with the planet gear through the same planet carrier, the planet gear is meshed with the adjusting gear, and the adjusting planet gear is meshed with the ring gear. The center sun gear is used as input, the ring gear is used as output, and therefore the stepless speed changing and torque changing effect can be achieved, and conversely, the stepless speed changing and torque changing effect can be achieved. According to the invention, the structure is simple, the transmission efficiency is high, the adopted parts are conventional standard parts, the process is simple, the manufacturing is easy, the transmission efficiency is improved, the stability is enhanced, the service life is prolonged, and the application prospect is wide.

Description

Technical Field

[0001] The invention belongs to the technical field of continuously variable speed change, and in particular relates to a gear type continuously variable speed torque changing transmission device. Background Art

[0002] Continuously variable transmission is widely used in current mechanical transmission, such as in the automotive field, oil extraction equipment field and transmission equipment field. In the prior art, the most commonly used continuously variable torque transmission device is mainly a hydraulic mechanical continuously variable transmission, which can achieve smooth starting and acceleration, reduce impact and vibration, has the ability to automatically adapt to load changes, and can automatically adjust the torque output under different working conditions.

[0003] However, the hydromechanical continuously variable transmission also has some disadvantages, such as relatively low transmission efficiency, large energy loss especially at high speeds, large size and weight, high manufacturing cost, complex manufacturing and maintenance, and relatively slow response speed.

[0004] Therefore, a new technical solution for a continuously variable transmission device is needed to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a continuously variable speed torque transmission device with simple structure, high transmission efficiency and strong stability.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A gear-type continuously variable speed torque transmission device, comprising a planet carrier and a central sun gear, planetary gears, and an adjusting planetary gear arranged on the planet carrier, wherein the planetary gears are meshed and connected with the central sun gear, the adjusting planetary gears are meshed and connected with the planetary gears, and the adjusting planetary gears are also meshed and connected with a transmission mechanism; the central sun gear and the transmission mechanism are used for an input end and an output end; The working principle of the gear-type continuously variable speed and torque transmission device is as follows: by adjusting the planetary gears, the torque borne by the planetary carrier is in the same direction as the rotation direction of the input end, and the sum of the torques is greater than or equal to zero. At the same time, the rotation directions of the input end and the output end are the same. The planetary carrier does not need to fix the torque of the input end and can transfer all of it to the output end. The output speed and torque can change with the change of the external torque, thereby achieving the effect of gear-type automatic continuously variable speed and torque conversion.

[0007] In some embodiments, the transmission mechanism includes a ring gear, and the ring gear is meshingly connected with the adjusting planetary gear; The centers of the planetary gears and the adjusting planetary gears are both located on a circle with the central sun gear as the center, so that the sum of the moments on the planet carrier is greater than or equal to zero.

[0008] Furthermore, the number of the planetary gears and the regulating planetary gears is equal, and the number is at least two, so as to ensure rotation balance.

[0009] In some embodiments, the transmission mechanism includes a second central sun gear, and the adjusting planetary gear includes a first adjusting planetary gear and a second adjusting planetary gear that are meshed and connected, the first adjusting planetary gear is meshed and connected with the planetary gear, and the second central sun gear is meshed and connected with the second adjusting planetary gear; The centers of the planetary gears, the first adjusting planetary gear, and the second adjusting planetary gear are all located on a circle with the central sun gear as the center, so that the sum of the moments on the planet carrier is greater than or equal to zero.

[0010] Furthermore, the number of the planetary gears, the first adjusting planetary gears and the second adjusting planetary gears are the same and are at least two, so as to ensure rotation balance.

[0011] The beneficial effects of the present invention are: The structure is simple and the transmission efficiency is high. The components used are conventional standard parts. The process is simple and the manufacturing is easy. The transmission efficiency is improved, the stability is enhanced, the service life is extended, and it has broad application prospects.

[0012] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of a gear-type continuously variable speed torque transmission device shown in Example 1 of the present invention; Figure 2 It is a three-dimensional diagram of the gear-type continuously variable speed torque transmission device shown in Example 1 of the present invention; Figure 3 It is a schematic structural diagram of a gear-type continuously variable speed torque transmission device shown in Example 2 of the present invention; Figure 4 It is a stereoscopic diagram of the gear-type continuously variable speed torque transmission device shown in Example 2 of the present invention.

[0014] Description of the accompanying drawings: 1. Center sun gear; 2. Planetary gears; 3. First adjusting planetary gear; 4. Ring gear; 5. Planet carrier; 6. Second adjusting planetary gear; 7. Second center sun gear. DETAILED DESCRIPTION

[0015] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. 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.

[0016] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0017] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. Example 1

[0019] See also Figure 1-2 , a gear-type continuously variable speed torque transmission device, comprising a planet carrier 5, a central sun gear 1 and a pair of planet gears 2 arranged on the planet carrier 5, wherein the planet gears 2 are arranged on both sides of the central sun gear 1 and meshedly connected therewith; Specifically, a pair of first adjusting planetary gears 3 are further provided on the planet carrier 5 . The two first adjusting planetary gears 3 are meshedly connected with the two planetary gears 2 respectively. The outer sides of the first adjusting planetary gears 3 are meshedly connected with the ring gear 4 .

[0020] It should be noted that the centers of the planetary gear 2 and the first adjusting planetary gear 3 are both located on a circle with the central sun gear 1 as the center.

[0021] Working principle: When the center sun gear 1 is used as input and the ring gear 4 is used as output, the ring gear 4 will achieve stepless speed and torque change between greater than 0 and less than 1; conversely, when the ring gear 4 is used as input and the center sun gear 1 is used as output, the center sun gear 1 will automatically change speed and torque between equal to 1 and greater than 1, thereby achieving stepless speed and torque change. Example 2

[0022] See also Figure 3-4 , a gear-type continuously variable speed torque transmission device, comprising a planet carrier 5, a central sun gear 1 and a pair of planet gears 2 arranged on the planet carrier 5, wherein the planet gears 2 are arranged on both sides of the central sun gear 1 and meshedly connected therewith; Specifically, the planet carrier 5 is also provided with a pair of first adjusting planetary gears 3 and a pair of first adjusting planetary gears 3, the two first adjusting planetary gears 3 are respectively meshed and connected with the two planetary gears 2, and the two first adjusting planetary gears 3 are respectively meshed and connected with the two second adjusting planetary gears 3; More specifically, a second central sun gear 7 is meshedly connected between the two first adjusting planetary gears 6 .

[0023] It should be noted that the centers of the planetary gear 2 and the second adjusting planetary gear are both located on a circle with the central sun gear 1 as the center.

[0024] Working principle: When the center sun gear 1 is used as input and the second center sun gear 7 is used as output, the second center sun gear 7 will achieve stepless speed change and torque conversion between greater than 0 and less than 1. Conversely, when the second center sun gear 7 is used as input and the center sun gear 1 is used as output, the center sun gear 1 will achieve stepless speed change and torque conversion between equal to 1 and greater than 1, thereby achieving stepless speed change and torque conversion.

[0025] To sum up, based on the planetary gears, the present application sets multiple groups of adjusting planetary gears meshing with the planetary gears to change the rotation direction of the output wheel and adjust the torque borne by the planetary carrier. When the center of the adjusting planetary gear is at a certain position, the torque borne on the planetary carrier is in the same direction as the input end, and the sum of the torques is equal to zero or greater than zero, and the output wheel will achieve stepless speed and torque output.

[0026] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0027] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A gear-type continuously variable speed torque transmission device, characterized in that: It includes a planet carrier and a central sun gear, planetary gears and an adjusting planetary gear arranged on the planet carrier, wherein the planetary gears are meshed and connected with the central sun gear, the adjusting planetary gears are meshed and connected with the planetary gears, and the adjusting planetary gears are also meshed and connected with a transmission mechanism; the central sun gear and the transmission mechanism are used for the input end and the output end; The working principle of the gear-type continuously variable speed and torque transmission device is as follows: by adjusting the planetary gears, the torque borne by the planetary carrier is in the same direction as the rotation direction of the input end, and the sum of the torques is greater than or equal to zero. At the same time, the rotation directions of the input end and the output end are the same. The planetary carrier does not need to fix the torque of the input end and can transfer all of it to the output end. The output speed and torque can change with the change of the external torque, thereby achieving the effect of gear-type automatic continuously variable speed and torque conversion.

2. The gear-type continuously variable speed torque transmission device according to claim 1, characterized in that: The transmission mechanism comprises a ring gear, and the ring gear is meshedly connected with the adjusting planetary gear; The centers of the planetary gears and the adjusting planetary gears are both located on a circle with the central sun gear as the center, so that the sum of the moments on the planet carrier is greater than or equal to zero.

3. The gear-type continuously variable speed torque transmission device according to claim 1, characterized in that: The transmission mechanism includes a second central sun gear, and the adjusting planetary gear includes a first adjusting planetary gear and a second adjusting planetary gear that are meshed and connected, the first adjusting planetary gear is meshed and connected with the planetary gear, and the second central sun gear is meshed and connected with the second adjusting planetary gear; The centers of the planetary gears, the first adjusting planetary gear, and the second adjusting planetary gear are all located on a circle with the central sun gear as the center, so that the sum of the moments on the planet carrier is greater than or equal to zero.

4. The gear-type continuously variable speed torque transmission device according to claim 2, characterized in that: The number of the planetary gears and the regulating planetary gears is equal and at least two to ensure rotation balance.

5. The gear-type continuously variable speed torque transmission device according to claim 3, characterized in that: The number of the planetary gears, the first adjusting planetary gears and the second adjusting planetary gears are the same and at least two to ensure rotation balance.

Images