CN116123264A

CN116123264A - Gyro gear and transmission mechanism based on same

Info

Publication number: CN116123264A
Application number: CN202310041014.7A
Authority: CN
Inventors: 李泽民; 徐婧
Original assignee: Modoli Intelligent Transmission Jiangsu Co ltd
Current assignee: Modoli Intelligent Transmission Jiangsu Co ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-05-16

Abstract

The invention discloses a gyro gear and a transmission mechanism based on the gyro gear. The gyro gear comprises a right gear part and a left gear part, wherein the right gear part is a gear with a variable tooth thickness, and one end with a large diameter of a tooth top circle is fixedly connected with one end of the left gear part and is coaxial. In the transmission mechanism, a third gear is meshed with the right part of the gear for transmission, and a fourth gear is meshed with the left part of the gear for transmission; the axial distance between the third gear and the fourth gear is fixed, the position of the fourth gear is fixed, and the gyro gear is provided with a bearing so as to have radial play; the elastic device is arranged at the other end of the left part of the gear or at one end of the third gear opposite to the left part of the gear and is used for pushing the gyro gear and the third gear to move relatively axially so as to push the right part of the gear to be tightly meshed with the third gear and the left part of the gear as well as the fourth gear. The invention can reduce the influence of the abrasion of the tooth surface of the gear, thereby improving the transmission precision of the transmission mechanism in the whole life cycle.

Description

Gyro gear and transmission mechanism based on same

Technical Field

The invention relates to the technical field of mechanical transmission, in particular to a gyro gear and a transmission mechanism based on the gyro gear.

Background

The gear transmission mechanism is a device for transmitting motion and power by a gear pair, has the advantages of more accurate transmission, high efficiency, compact structure, reliable work and long service life, and therefore, becomes the most widely applied mechanical transmission mode in various modern devices.

When the gear teeth are meshed, the surfaces of the gear teeth are worn due to relative sliding, particularly when external hard particles enter between meshed working surfaces. After the tooth surface is gradually worn, the tooth surface loses the correct tooth shape, and the transmission precision is affected. Therefore, the existing wheel transmission mechanism is improved to reduce the influence of tooth surface abrasion, so that the gear transmission mechanism can keep high-precision operation in the whole life cycle, and the problem to be solved is urgent.

Disclosure of Invention

The invention aims to provide a gyro gear and a gyro gear-based transmission mechanism, which can reduce the influence of gear tooth surface abrasion and improve the transmission precision of the transmission mechanism in the whole life cycle.

The technical solution for realizing the purpose of the invention is as follows:

the invention provides a gyro gear, which comprises a right gear part and a left gear part;

the right part of the gear is a gear with a variable tooth thickness, and the gear is provided with a right end with a small tooth top circle diameter and a left end with a large tooth top circle diameter;

the diameter of the top circle of the left part of the gear is unchanged, and the gear is provided with a right end and a left end;

the left gear part and the right gear part are coaxial, and the right end of the left gear part and the left end of the right gear part are opposite.

As a specific example, the right gear portion and the left gear portion are integrally formed or fixedly formed as one body.

As a specific example, the gear end face at the left end of the gear left part and the gear end face at the left end of the gear right part are attached.

As a specific example, a gap is provided between the right end of the left part of the gear and the gear end face of the left end of the right part of the gear.

As a specific example, the diameter of the addendum circle of the left portion of the gear is not larger than the diameter of the addendum circle of the left end of the right portion of the gear.

As a specific example, the diameter of the addendum circle at the left end of the gear is smaller, equal to, or larger than the diameter of the addendum circle at the right end of the gear.

As a specific example, the gear left portion adopts a spur gear or a helical gear.

The invention also provides a transmission mechanism, which comprises the gyro gear, a third gear, a fourth gear and an elastic device, wherein:

the transmission mechanism based on the gyro gear further comprises a third gear, a fourth gear and an elastic device, wherein:

the third gear is a gear with a variable tooth thickness, one end with a large diameter of the tooth top circle of the third gear is reversely arranged with one end with a large diameter of the tooth top circle of the right part of the gear, and the third gear and the right part of the gear are meshed with each other for transmission;

the fourth gear and the left part of the gear are meshed with each other for transmission;

under the action of the elastic device, the gyro gear and the third gear can move axially relatively.

As a specific example, the inter-axis distance between the third gear and the fourth gear is fixed; the axial position and the radial position of the fourth gear are fixed; the gyro gear has radial play.

As a specific example, the gyro gear has radial play by providing gyro gear bearings at both ends of the gyro gear.

As a specific example, the axial position of the third gear is fixed, and the gyro gear has an axial play.

As a specific example, the elastic means is provided at the left end of the left part of the gear.

As a specific example, the gyro gear is axially displaced towards the direction of the right end of the right part of the gear under the action of the elastic device, so that the right part of the gear is tightly meshed with the third gear; the right part of the gear interacts with the third gear, so that the gyro gear generates radial displacement towards the fourth gear, and the left part of the gear is tightly meshed with the fourth gear.

As a specific example, the third gear is an internal gear or an external gear.

As a specific example, the fourth gear is an internal gear or an external gear.

As a specific example, the elastic device includes an elastic element, one end of which is fixed, the other end of which abuts against the left end of the left part of the gear, and the elastic element is in a compressed state.

As a specific example, the elastic device includes an elastic element, a first steel ball, and an elastic element base;

an elastic device hole is formed in the left end of the left part of the gear; the elastic device hole is sequentially filled with a first steel ball, an elastic element and an elastic element base;

one end of the elastic element is sleeved on the elastic element base, the other end of the elastic element is abutted against one side of the first steel ball, the elastic element is in a compressed state, and the other side of the first steel ball is abutted against the end part of the elastic device hole.

As a specific example, the elastic device includes an elastic element, a first steel ball, a second steel ball, and an elastic element base;

the left end of the left part of the gear is provided with an elastic device hole; the elastic device hole is sequentially filled with a first steel ball, a second steel ball, an elastic element and an elastic element base;

one end of the elastic element is sleeved on the elastic element base, the other end of the elastic element is abutted against the second steel ball, the elastic element is in a compressed state, the second steel ball is abutted against the elastic element and the first steel ball at the same time, and one side of the first steel ball is abutted against the second steel ball, and the other side of the first steel ball is abutted against the end part of the elastic device hole.

As a specific example, the bottom end of the elastic device hole is tapered.

As a specific example, the third gear is an external gear, and the third gear has an axial play.

As a specific example, the third gear is made to have an axial play by providing third gear bearings at both ends of the third gear.

As a specific example, the elastic means is provided at an end of the third gear having a larger diameter than the addendum circle.

As a specific example, the third gear is axially displaced towards the direction where the left end of the left part of the gear is located under the action of the elastic device, so that the right part of the gear is tightly meshed with the third gear; the right part of the gear interacts with the third gear, so that the gyro gear generates radial displacement towards the fourth gear, and the left part of the gear is tightly meshed with the fourth gear.

As a specific example, the fourth gear is an internal gear or an external gear.

As a specific example, the elastic device includes an elastic element, one end of which is fixed, and the other end of which abuts against one end of the third gear having a large diameter, and the elastic element is in a compressed state.

an elastic device hole is formed in one end of the third gear with the larger diameter of the addendum circle; the elastic device hole is sequentially filled with a first steel ball, an elastic element and an elastic element base;

an elastic device hole is formed in the end, with the larger diameter, of the top circle of the third gear for installing an elastic device; the elastic device hole is sequentially filled with a first steel ball, a second steel ball, an elastic element and an elastic element base;

As a specific example, the bottom end of the elastic device hole is tapered.

As a specific example, the radial play range of the gyro gear is 0.05mm to 0.1mm.

As a specific example, the gyro gear bearing is a cylindrical roller bearing.

As a specific example, the elastic element is a spring.

Compared with the prior art, the invention has the remarkable advantages that:

(1) The gyro gear disclosed by the invention has the advantages that the gear is divided into the left part and the right part, the right part adopts the gear with the variable tooth thickness, and the gyro gear is small in size, simple in process and reliable in structure;

(2) According to the invention, the relative axial positions of the third gear and the gyro gear are adjusted in real time through the elastic assembly, and meanwhile, the radial position of the gyro gear can be adjusted in real time along with the thrust of the third gear, so that the backlash of gear teeth of two pairs of gear pairs can be reduced simultaneously under the condition of keeping the axial distance between the third gear and the fourth gear unchanged, zero return difference is kept, and high-precision transmission in the whole life cycle is further kept;

(3) Because the gear is used for a long time, the gear teeth of each gear are worn, so that the gear tooth backlash of the right part of the gear and the gear tooth backlash of the third gear are increased, and when the gear tooth backlash of the left part of the gear and the gear tooth backlash of the fourth gear are increased, the gear tooth backlash of the right part of the gear and the gear tooth backlash of the third gear are reduced to zero because the gear tooth backlash is a variable tooth thickness gear and the gyro gear bearing has axial play, the elastic device can push the gyro gear to move, so that the gear wear is compensated, the right part of the gear and the third gear are tightly meshed again, and the gear tooth backlash is reduced to zero;

(4) According to the invention, the elastic device is adopted to mesh the two gears with the variable tooth thickness, so that the space of the gears for resisting hard deformation caused by abnormal factors is increased, and the service life of the gears is prolonged;

(5) The elastic device adopted by the invention can be realized in various forms, and is flexible and convenient;

(6) The process structure of each part in the whole transmission mechanism is simple, easy to realize and low in cost.

Drawings

Fig. 1 is a schematic diagram of a structure in which end faces of a left part and a right part of a gyro gear are attached to each other in an embodiment of the present invention.

Fig. 2 is a schematic diagram of a structure in which gaps are provided on end surfaces of a left gear and a right gear of a gyro gear in an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a gyro gear using a spur gear in the left part of the gear according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of a gyro gear using a helical gear in the left part of the gear according to an embodiment of the present invention.

Fig. 5 is a schematic view of a transmission mechanism in which an elastic device is mounted at the left end of the left part of a gear in an embodiment of the present invention.

FIG. 6 is a force-bearing schematic view of a transmission mechanism with an elastic device mounted on the left end of the left portion of a gear in an embodiment of the invention.

Fig. 7 is a schematic view of a first elastic device installed at the left end of the left part of the gear in the embodiment of the present invention.

Fig. 8 is a schematic structural view of a second elastic device installed at the left end of the left part of the gear in the embodiment of the present invention.

Fig. 9 is a schematic structural view of a third elastic device installed at the left end of the left part of the gear in the embodiment of the present invention.

Fig. 10 is a schematic view of a transmission mechanism in which an elastic device is mounted on the end of the third gear with the larger diameter of the addendum circle in the embodiment of the present invention.

Fig. 11 is a schematic diagram showing the force applied to a transmission mechanism in which an elastic device is mounted on the end of a third gear with a larger diameter.

Fig. 12 is a structural view of a first elastic means installed at the end of the third gear having a larger diameter of the addendum circle in the embodiment of the present invention.

Fig. 13 is a structural view of a second elastic means installed at the end of the third gear having a larger diameter of the addendum circle in the embodiment of the present invention.

Fig. 14 is a structural view of a third elastic means installed at an end of a third gear having a larger diameter of a addendum circle in the embodiment of the present invention.

Detailed Description

It is easy to understand that various embodiments of the present invention can be envisioned by those of ordinary skill in the art without altering the true spirit of the present invention in light of the present teachings. Accordingly, the following detailed description and drawings are merely illustrative of the invention and are not intended to be exhaustive or to limit or restrict the invention.

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise.

The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of exemplary embodiments may have different values.

The invention provides a gyro gear and a transmission mechanism based on the gyro gear. The gyro gear comprises a right gear part and a left gear part, wherein the right gear part is a gear with a variable tooth thickness, and one end with a large diameter of a tooth top circle is fixedly connected with one end of the left gear part and is coaxial. In the gyro gear-based transmission mechanism, a third gear is meshed with the right part of a gear for transmission, and a fourth gear is meshed with the left part of the gear for transmission; the axial distance between the third gear and the fourth gear is fixed, the position of the fourth gear is fixed, and the gyro gear has radial play through arranging a gyro gear bearing; the elastic device is arranged at the other end of the left part of the gear or at one end of the third gear opposite to the left part of the gear and is used for pushing the gyro gear and the third gear to move relatively axially so as to push the right part of the gear to be tightly meshed with the third gear and the left part of the gear as well as the fourth gear.

The invention will be described in further detail with reference to the drawings and the specific examples.

Example 1

Referring to fig. 1 to 2, embodiment 1 provides a gyro gear including a right gear portion 1 and a left gear portion 2;

the right part 1 of the gear is a gear with a variable tooth thickness and is provided with a right end with a small tooth top circle diameter and a left end with a large tooth top circle diameter;

the diameter of the addendum circle of the left part 2 of the gear is unchanged, and the gear has a right end and a left end;

the gear left part 2 and the gear right part 1 are coaxial, and the right end of the gear left part 2 and the left end of the gear right part 1 are arranged in opposite directions.

Example 2

The embodiment includes the technical scheme shown in embodiment 1, and the gyro gear provided in embodiment 1 includes a right gear portion 1 and a left gear portion 2, where the two portions refer to two parts of the gyro gear having different tooth surfaces, and the gyro gear is not limited to a split structure or an integral structure.

In some embodiments, the right gear part 1 and the left gear part 2 are integrally formed.

In some embodiments, the right gear part 1 and the left gear part 2 are fixed and formed into a whole, and the fixing manner may be welding fixing, bolting fixing, etc.

Example 3

In this embodiment, on the basis of embodiment 1, the gear end face at the right end of the gear left part 2 and the gear end face at the left end of the gear right part 1 are attached to each other, as shown in fig. 1.

Example 4

In this embodiment, on the basis of embodiment 1, a gap is provided between the right end of the gear left part 2 and the gear end face of the left end of the gear right part 1, as shown in fig. 2.

Example 5

In this embodiment, on the basis of embodiment 2, the diameter of the addendum circle of the left gear part 2 is equal to the diameter of the addendum circle of the left end of the right gear part 1; alternatively, the diameter of the addendum circle of the left gear portion 2 is smaller than the diameter of the addendum circle of the left end of the right gear portion 1.

Example 6

In this embodiment, on the basis of embodiment 3, the diameter of the addendum circle of the left gear part 2 is equal to the diameter of the addendum circle of the left end of the right gear part 1; or the diameter of the addendum circle of the left part 2 of the gear is smaller than that of the left end of the right part 1 of the gear; alternatively, the diameter of the addendum circle of the left gear portion 2 is larger than the diameter of the addendum circle of the left end of the right gear portion 1.

Example 7

Referring to fig. 3, in this embodiment, on the basis of embodiment 1, the gear left part 2 is a spur gear.

Example 8

Referring to fig. 4, in this embodiment, a bevel gear is used for the left gear portion 2 based on embodiment 1.

Example 9

With reference to fig. 5, this embodiment provides a transmission mechanism, which includes the gyro gear according to any one of embodiments 1 to 8, and further includes a third gear 3, a fourth gear 4, and an elastic device 5, wherein: the third gear 3 is a gear with a variable tooth thickness, one end with a large tooth top circle diameter of the third gear 3 is reversely arranged with one end with a large tooth top circle diameter of the right gear part 1, and the third gear 3 and the right gear part 1 are meshed with each other for transmission; the fourth gear 4 and the left gear part 2 are meshed with each other for transmission; the gyro gear and the third gear 3 can move axially relative to each other under the action of the elastic means 5.

As a further embodiment, the axial distance between the third gear 3 and the fourth gear 4 is fixed; the axial position and the radial position of the fourth gear 4 are fixed; the gyro gear has radial play.

As a further embodiment, the gyro gear has radial play by providing gyro gear bearings 7 at both ends of the gyro gear.

Example 10

The embodiment includes the technical solution shown in embodiment 9, where, on the basis of embodiment 9, the axial position of the third gear 3 is fixed, and the gyro gear has an axial play.

Example 11

Referring to fig. 5 to 6, this embodiment includes the technical solution shown in embodiment 10, and in this embodiment, based on embodiment 10, the elastic device 5 is disposed at the left end of the left gear portion 2, the axial position of the third gear 3 is fixed, and the gyro gear has an axial play. The gyro gear is axially displaced towards the direction of the right end of the right gear part 1 under the action of the elastic device 5, so that the right gear part 1 is tightly meshed with the third gear 3; the right gear part 1 interacts with the third gear 3 such that the gyro gear is displaced radially towards the fourth gear 4, the left gear part 2 being in close engagement with the fourth gear 4.

In this mounting structure embodiment of the elastic means 5, the principle of the transmission mechanism is as follows:

in the initial state, the right gear 1 and the third gear 3 are tightly engaged, and the left gear 2 and the fourth gear 4 are tightly engaged. Due to the long-term use, the teeth of the respective gears wear, resulting in an increase in the gear tooth backlash of the right gear 1 and the third gear 3, and an increase in the gear tooth backlash of the left gear 2 and the fourth gear 4. When the backlash between the right gear 1 and the third gear 3 is increased, the gear teeth are in a gear thickness changing mode, the gyro gear bearing 7 has axial play, the elastic device 5 can push the gyro gear to move along the direction A, and the gear teeth backlash is reduced to zero because the position of the third gear 3 is fixed and the right gear 1 and the third gear 3 are tightly meshed again. During this pushing process, the third gear 3 with fixed position gives a pushing force along the direction B to the gyro gear moving along the direction a, because the gyro gear bearing 7 of the gyro gear provides a space for radial movement, the gyro gear moves along the direction B, because the position of the fourth gear 4 is fixed, the left part 2 of the gear is tightly meshed with the fourth gear 4 again, and the gear tooth backlash is reduced to zero.

As a further embodiment, the third gear 3 may be an internal gear or an external gear, and the fourth gear 4 may be an internal gear or an external gear, which are illustrated as the third gear 3 and the fourth gear 4.

Example 12

Referring to fig. 7, this embodiment includes a technical solution shown in embodiment 11, and this embodiment realizes, on the basis of embodiment 11, a simple elastic device 5 capable of providing an axial force, where the elastic device 5 includes an elastic element 51, one end of which is fixed, and the other end abuts against the left end of the left gear part 2, and the elastic element 51 is in a compressed state.

Optionally, the elastic element 51 is a spring.

Example 13

With reference to fig. 8, this embodiment includes a technical solution shown in embodiment 11, and this embodiment provides a more stable implementation manner of the elastic device on the basis of embodiment 11, and simultaneously reduces friction resistance of the elastic device to a gear shaft of the gyro gear, where the elastic device 5 includes an elastic element 51, a first steel ball 52 and an elastic element base 53;

an elastic device hole 6 is arranged at the left end of the left gear part 2; the elastic device hole 6 is internally provided with a first steel ball 52, an elastic element 51 and an elastic element base 53 in sequence;

one end of the elastic element 51 is sleeved on the elastic element base 53, the other end of the elastic element is abutted against one side of the first steel ball 52, the elastic element 51 is in a compressed state, and the other side of the first steel ball 52 is abutted against the end part of the elastic device hole 6.

As a further embodiment, the bottom end of the elastic device hole 6 is tapered.

Optionally, the elastic element 51 is a spring.

Example 14

Referring to fig. 9, this embodiment includes the technical solution shown in embodiment 11, which is different from embodiment 13 in that a more stable implementation of the elastic device is provided, and friction resistance of the elastic device to the gear shaft of the first gear is further reduced, and the elastic device 5 includes an elastic element 51, a first steel ball 52, a second steel ball 54, and an elastic element base 53;

the left end of the left gear part 2 is provided with an elastic device hole 6; the elastic device hole 6 is internally provided with a first steel ball 52, a second steel ball 54, an elastic element 51 and an elastic element base 53 in sequence;

one end of the elastic element 51 is sleeved on the elastic element base 53, the other end of the elastic element 51 is abutted against the second steel ball 54, the elastic element 51 is in a compressed state, the second steel ball 54 is abutted against the elastic element 51 and the first steel ball 52 at the same time, and one side of the first steel ball 52 is abutted against the second steel ball 54, and the other side is abutted against the end part of the elastic device hole 6.

Optionally, the elastic element 51 is a spring.

Example 15

The present embodiment includes the technical solution shown in embodiment 9, and the difference between this embodiment and embodiment 9 is that the third gear 3 is an external gear, and the third gear 3 has an axial play.

As a specific embodiment, the third gear 3 has an axial play by providing third gear bearings 8 at both ends of the third gear 3.

Example 16

Referring to fig. 10 to 11, this embodiment includes most of the technical solution shown in embodiment 11, and is different from embodiment 11 in that the elastic device 5 is disposed at an end of the third gear 3 with a larger diameter of the addendum circle, and the third gear 3 has an axial play.

The third gear 3 is axially displaced towards the left end of the left gear part 2 under the action of the elastic device 5, so that the right gear part 1 is tightly meshed with the third gear 3; the right gear part 1 interacts with the third gear 3 such that the gyro gear is displaced radially towards the fourth gear 4, the left gear part 2 being in close engagement with the fourth gear 4.

in the initial state, the right gear 1 and the third gear 3 are tightly engaged, and the left gear 2 and the fourth gear 4 are tightly engaged. Due to the long-term use, the teeth of the respective gears wear, resulting in an increase in the gear tooth backlash of the right gear 1 and the third gear 3, and an increase in the gear tooth backlash of the left gear 2 and the fourth gear 4. When the backlash between the right gear part 1 and the third gear 3 is increased, the elastic device 5 can push the third gear 3 to move along the direction C because the gear part and the third gear are both gear with variable tooth thickness, so that the third gear 3 and the right gear part 1 are tightly meshed again, and the gear tooth backlash is reduced to zero. During the movement of the third gear 3, the third gear 3 imparts a force in the B direction to the gyro gear. Since the gyro gear bearing 7 of the gyro gear at this time provides only radial play, the gyro gear can only move in the B direction, and since the position of the fourth gear 4 is fixed, the gear left part 2 is tightly meshed with the fourth gear 4 again, and the gear tooth backlash is reduced to zero.

As a further embodiment, the fourth gear 4 may be an internal gear or an external gear, and the third gear 3 and the fourth gear 4 are both exemplified as external gears in the drawing.

Example 17

With reference to fig. 12, this embodiment includes a technical solution shown in embodiment 16, and this embodiment realizes, on the basis of embodiment 16, a simple elastic device 5 capable of providing an axial force, where the elastic device 5 includes an elastic element 51, one end of which is fixed, and the other end abuts against one end of the third gear 3 with a large diameter of the addendum circle, and the elastic element 51 is in a compressed state.

Optionally, the elastic element 51 is a spring.

Example 18

Referring to fig. 13, this embodiment includes a technical solution shown in embodiment 16, which is different from embodiment 17 in that a more stable implementation of an elastic device is provided, and simultaneously friction resistance of the elastic device to a gear shaft of a gyro gear is reduced, and the elastic device 5 includes an elastic element 51, a first steel ball 52 and an elastic element base 53;

an elastic device hole 6 is formed in one end of the third gear 3 with the larger diameter of the addendum circle; the elastic device hole 6 is internally provided with a first steel ball 52, an elastic element 51 and an elastic element base 53 in sequence;

Optionally, the elastic element 51 is a spring. Example 19

Referring to fig. 14, this embodiment includes the technical solution shown in embodiment 16, which is different from embodiment 18 in that a more stable implementation of the elastic device is provided, the friction resistance of the elastic device to the gear shaft of the first gear is further reduced, and the elastic device 5 includes an elastic element 51, a first steel ball 52, a second steel ball 54, and an elastic element base 53;

an elastic device hole 6 is formed in the end, with the larger diameter, of the addendum circle of the third gear 3 and is used for installing an elastic device 5; the elastic device hole 6 is internally provided with a first steel ball 52, a second steel ball 54, an elastic element 51 and an elastic element base 53 in sequence;

Optionally, the elastic element 51 is a spring.

Example 20

In the foregoing embodiments, the gyro gear bearing 7 may be a cylindrical roller bearing or other bearings with inner and outer rings capable of moving relatively, and the radial play of the gyro gear bearing 7 may range from 0.05mm to 0.1mm, so as to provide a space for radial movement of the gyro gear.

In order to reduce the influence of gear tooth surface abrasion and improve the transmission precision of the transmission mechanism in the whole life cycle, the invention provides a gyro gear and the transmission mechanism based on the gyro gear, and the transmission mechanism utilizes the gyro gear to replace the traditional gear transmission. The elastic device adjusts the relative axial position of the third gear and the gyro gear in real time, and meanwhile, the gyro gear bearing enables the radial position of the gyro gear to be adjusted in real time along with the thrust of the third gear. Therefore, under the condition of keeping the axial distance between the third gear and the fourth gear unchanged, the gear tooth backlash of the first-third gear pair and the second-fourth gear pair can be reduced simultaneously, and zero return difference is kept, so that a tight meshing state can be kept in the whole life cycle, and the transmission precision of the transmission mechanism in the whole life cycle is improved.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.

It should be appreciated that in the above description of exemplary embodiments of the invention, various features of the invention are sometimes described in the context of a single embodiment or with reference to a single figure in order to streamline the invention and aid those skilled in the art in understanding the various aspects of the invention. The present invention should not, however, be construed as including features that are essential to the patent claims in the exemplary embodiments.

Claims

1. A gyro gear, which is characterized by comprising a right gear part (1) and a left gear part (2);

the right part (1) of the gear is a gear with variable tooth thickness, and the diameters of the addendum circles at the two ends of the gear are different, wherein the diameter of the addendum circle at the right end is smaller than that of the addendum circle at the left end;

the diameter of the top circle of the left part (2) of the gear is unchanged;

the gear left part (2) and the gear right part (1) are coaxial, and the right end of the gear left part (2) and the left end of the gear right part (1) are arranged in opposite directions.

2. Gyro gear according to claim 1, characterized in that the right part (1) and the left part (2) of the gear are integrally formed or fixed to each other.

3. The gyro gear according to claim 1, wherein the gear end face of the right end of the gear left part (2) and the gear end face of the left end of the gear right part (1) are fitted.

4. The gyro gear according to claim 1, characterized in that a gap is provided between the right end of the gear left part (2) and the gear end face of the gear right part (1) left end.

5. A gyro gear according to claim 3, characterized in that the diameter of the addendum circle of the left part (2) of the gear is not larger than the diameter of the addendum circle of the left end of the right part (1) of the gear.

6. The gyro gear according to claim 4, characterized in that the diameter of the addendum circle of the left part (2) of the gear is smaller, equal or larger than the diameter of the addendum circle of the left end of the right part (1) of the gear.

7. Gyro gear according to claim 1, characterized in that the gear left part (2) adopts spur or helical gears.

8. The transmission mechanism is characterized by comprising the gyro gear according to any one of claims 1-7, a third gear (3), a fourth gear (4) and an elastic device (5), wherein:

the third gear (3) is a gear with a variable tooth thickness, one end with a large tooth top circle diameter of the third gear (3) is reversely arranged with one end with a large tooth top circle diameter of the right gear part (1), and the third gear (3) and the right gear part (1) are meshed with each other for transmission;

the fourth gear (4) and the left gear part (2) are meshed with each other for transmission;

under the action of the elastic device (5), the gyro gear and the third gear (3) can move relatively and axially.

9. A transmission according to claim 8, characterized in that the axial distance between the third gear (3) and the fourth gear (4) is fixed; the axial position and the radial position of the fourth gear (4) are fixed; the gyro gear has radial play.

10. A transmission according to claim 9, characterized in that the gyro gear is provided with radial play by providing gyro gear bearings (7) at both ends of the gyro gear.

11. A transmission according to claim 10, characterized in that the axial position of the third gear (3) is fixed, the gyro gear having axial play.

12. A transmission according to claim 11, characterized in that the elastic means (5) are arranged at the left end of the left gear part (2).

13. The transmission mechanism according to claim 12, wherein the gyro gear is axially displaced towards the right end of the right gear part (1) under the action of the elastic means (5), so that the right gear part (1) is tightly meshed with the third gear (3); the right part (1) of the gear interacts with the third gear (3) so that the gyro gear generates radial displacement towards the fourth gear (4), and the left part (2) of the gear is tightly meshed with the fourth gear (4).

14. A transmission according to claim 13, characterized in that the third gear (3) is an internal or external gear.

15. A transmission according to claim 13, characterized in that the fourth gear (4) is an internal or external gear.

16. A transmission according to claim 13, characterized in that the elastic means (5) comprise an elastic element (51) with one end fixed and the other end abutting the left end of the left gear part (2), and in that the elastic element (51) is in a compressed state.

17. The transmission mechanism according to claim 13, characterized in that the elastic means (5) comprise an elastic element (51), a first steel ball (52) and an elastic element seat (53);

an elastic device hole (6) is arranged at the left end of the left part (2) of the gear; the elastic device hole (6) is internally provided with a first steel ball (52), an elastic element (51) and an elastic element base (53) in sequence;

one end of the elastic element (51) is sleeved on the elastic element base (53), the other end of the elastic element is abutted against one side of the first steel ball (52), the elastic element (51) is in a compressed state, and the other side of the first steel ball (52) is abutted against the end part of the elastic device hole (6); .

18. The transmission mechanism according to claim 13, characterized in that the elastic means (5) comprise an elastic element (51), a first steel ball (52), a second steel ball (54) and an elastic element seat (53);

an elastic device hole (6) is formed in the left end of the left gear part (2); the elastic device hole (6) is internally provided with a first steel ball (52), a second steel ball (54), an elastic element (51) and an elastic element base (53) in sequence;

one end of the elastic element (51) is sleeved on the elastic element base (53), the other end of the elastic element is abutted against the second steel ball (54), the elastic element (51) is in a compressed state, the second steel ball (54) is abutted against the elastic element (51) and the first steel ball (52) at the same time, and one side of the first steel ball (52) is abutted against the second steel ball (54) and the other side of the first steel ball is abutted against the end of the elastic device hole (6).

19. A transmission according to claim 17 or 18, wherein the bottom end of the spring means aperture (6) is tapered.

20. A transmission according to claim 10, characterized in that the third gear (3) is an external gear and the third gear (3) has axial play.

21. A transmission according to claim 10 or 20, characterized in that the third gear wheel (3) has axial play by providing third gear bearings (8) at both ends of the third gear wheel (3).

22. A transmission according to claim 21, characterized in that the elastic means (5) are arranged at the end of the third gear (3) with the larger diameter of the addendum circle.

23. A transmission according to claim 22, characterized in that the third gear (3) is axially displaced towards the left end of the left gear part (2) under the action of the elastic means (5) so that the right gear part (1) is in tight engagement with the third gear (3); the right part (1) of the gear interacts with the third gear (3) so that the gyro gear generates radial displacement towards the fourth gear (4), and the left part (2) of the gear is tightly meshed with the fourth gear (4).

24. A transmission according to claim 23, characterized in that the fourth gear (4) is an internal or external gear.

25. A transmission mechanism according to claim 23, wherein the elastic means (5) comprises an elastic element (51) having one end fixed and the other end abutting against the end of the third gear (3) having the larger diameter of the addendum circle, and the elastic element (51) is in a compressed state.

26. The transmission mechanism according to claim 23, characterized in that the elastic means (5) comprise an elastic element (51), a first steel ball (52) and an elastic element seat (53);

an elastic device hole (6) is formed in one end of the third gear (3) with the larger diameter of the addendum circle; the elastic device hole (6) is internally provided with a first steel ball (52), an elastic element (51) and an elastic element base (53) in sequence;

one end of the elastic element (51) is sleeved on the elastic element base (53), the other end of the elastic element is abutted against one side of the first steel ball (52), the elastic element (51) is in a compressed state, and the other side of the first steel ball (52) is abutted against the end of the elastic device hole (6).

27. The transmission mechanism according to claim 23, characterized in that the elastic means (5) comprise an elastic element (51), a first steel ball (52), a second steel ball (54) and an elastic element seat (53);

an elastic device hole (6) is formed in one end of the third gear (3) with the larger diameter of the addendum circle and is used for installing an elastic device (5); the elastic device hole (6) is internally provided with a first steel ball (52), a second steel ball (54), an elastic element (51) and an elastic element base (53) in sequence;

28. A transmission according to claim 26 or 27, wherein the bottom end of the spring means aperture (6) is tapered.

29. The transmission mechanism according to claim 11 or 20, wherein the radial play of the gyro gear ranges from 0.05mm to 0.1mm.

30. The transmission mechanism according to claim 29, characterized in that the gyro gear bearing (7) is a cylindrical roller bearing.

31. A transmission according to claim 16, 17, 18, 25, 26 or 27, characterized in that the elastic element (51) is a spring.