CN218408346U

CN218408346U - Transmission structure based on bevel gear

Info

Publication number: CN218408346U
Application number: CN202221879970.XU
Authority: CN
Inventors: 孟庆周; 王丰; 孟繁星; 周子钰
Original assignee: Shenzhen Tales Technology Co ltd
Current assignee: Shenzhen Tales Technology Co ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2023-01-31
Anticipated expiration: 2032-07-20

Abstract

The embodiment of the disclosure discloses a transmission structure based on bevel gears. The bevel gear-based transmission structure comprises a first bevel gear and two second bevel gears, wherein the two second bevel gears are used for being meshed with the first bevel gear to drive the first bevel gear; the first bevel gear comprises a first meshing tooth and a first meshing tooth groove which are circumferentially arranged, and on the cross section of the first bevel gear, the meshing positions of the first meshing tooth and the first meshing tooth groove are both arc-shaped meshing lines; the second bevel gear comprises a second meshing tooth and a second meshing tooth groove which are circumferentially arranged, and on the cross section of the second bevel gear, the meshing parts of the second meshing tooth and the second meshing tooth groove are both arc-shaped meshing lines; during the transmission process of the transmission structure, at the same time, the meshing modes of the two second bevel gears and the first bevel gear are mutually supplemented.

Description

Transmission structure based on bevel gear

Technical Field

The disclosure relates to the technical field of machinery, in particular to a transmission structure based on bevel gears.

Background

Bevel gears, also called bevel gears or bevel gears, by means of which the transmission direction can be changed. The inventor has found that the bevel gear of the prior art has the following problems: (1) The bevel gears are meshed by involute, are always worn by a line and are not wear-resistant, and the service life of the bevel gears needs to be prolonged; (2) All be one-to-one cooperation in the use, stability is waited to promote, in case meshing tooth or meshing tooth's socket take place wearing and tearing, will seriously influence transmission effect.

SUMMERY OF THE UTILITY MODEL

In view of this, the disclosed embodiments provide a transmission structure based on bevel gears, which at least partially improves the service life and stability of the transmission structure.

In a first aspect, an embodiment of the present disclosure provides a transmission structure based on a bevel gear, which adopts the following technical scheme:

the transmission structure based on the bevel gears comprises a first bevel gear and two second bevel gears, wherein the two second bevel gears are used for being meshed with the first bevel gear to drive the first bevel gear; wherein the content of the first and second substances,

the first bevel gear comprises a first meshing tooth and a first meshing tooth groove which are circumferentially arranged, and on the cross section of the first bevel gear, the meshing positions of the first meshing tooth and the first meshing tooth groove are both arc-shaped meshing lines;

the second bevel gear comprises second meshing teeth and second meshing tooth grooves which are circumferentially arranged, and on the cross section of the second bevel gear, the meshing parts of the second meshing teeth and the second meshing tooth grooves are arc-shaped meshing lines;

in the transmission process of the transmission structure, at the same time, the meshing modes of the two second bevel gears and the first bevel gear are mutually complemented.

Alternatively, at the same time, the engagement portion of one of the second bevel gears is completely engaged with the engagement portion of the first bevel gear, and a gap is present between the engagement portion of the other of the second bevel gears and the engagement portion of the first bevel gear.

Alternatively, at the same time, the second meshing tooth of one of the second bevel gears meshes with the first meshing tooth groove of the first bevel gear, and the second meshing tooth groove of the other of the second bevel gears meshes with the first meshing tooth of the first bevel gear.

Optionally, the bevel gear based transmission structure further comprises a third bevel gear, and two of the second bevel gears are further used for being meshed with the third bevel gear to drive the third bevel gear; the third bevel gear comprises third meshing teeth and third meshing tooth grooves which are circumferentially arranged, and on the cross section of the third bevel gear, the meshing parts of the third meshing teeth and the third meshing tooth grooves are arc-shaped meshing lines.

Optionally, two of the second bevel gears are oppositely disposed, and the first bevel gear and the third bevel gear are oppositely disposed.

Optionally, the bevel gear based transmission structure further comprises at least one driving member and/or carrier member, the driving member and/or carrier member being fixedly connected with the first bevel gear and/or the second bevel gear.

Optionally, the driving member is a gear, an inner gear ring, an outer gear ring or a driving shaft; the frame member is a holed or a holeless chassis.

Optionally, the drive member or the carrier member is integrally formed with the first bevel gear or the second bevel gear.

Optionally, in a cross section of the first bevel gear, the first meshing tooth is composed of a first meshing line, a first top side line and a second meshing line which are sequentially connected end to end, the first meshing line and the second meshing line are circular arc lines which are connected end to end and have a first radius, the first top side line is a circular arc line which has a second radius, the second radius is larger than the first radius, the first meshing tooth groove is composed of a third meshing line, a first bottom side line and a fourth meshing line which are sequentially connected end to end, the third meshing line and the fourth meshing line are circular arc lines which are connected end to end and have a third radius, and the first bottom side line is a circular arc line which has a fourth radius;

on the cross section of the second bevel gear, the second meshing teeth consist of a fifth meshing line, a second top edge line and a sixth meshing line which are sequentially connected end to end, the fifth meshing line and the sixth meshing line are circular arc lines which are connected end to end and have a first radius, the second top edge line is a circular arc line which has a second radius, the second meshing tooth socket consists of a seventh meshing line, a second bottom edge line and an eighth meshing line which are sequentially connected end to end, the seventh meshing line and the eighth meshing line are circular arc lines which are connected end to end and have a third radius, and the second bottom edge line is a circular arc line which has a fourth radius;

during the driving of the driving structure, the first meshing line and the second meshing line mesh with the seventh meshing line and the eighth meshing line, or the third meshing line and the fourth meshing line mesh with the fifth meshing line and the sixth meshing line.

Optionally, in a cross section of the first bevel gear, the first meshing teeth have a ninth meshing line which is convex outward, the ninth meshing line is a circular arc line, the first meshing tooth grooves have a tenth meshing line which is concave inward, and the tenth meshing line is a circular arc line;

on the cross section of the second bevel gear, the second meshing teeth are provided with an eleventh meshing line which is convex outwards and is a circular arc line, the second meshing tooth grooves are provided with a twelfth meshing line which is concave inwards and is a circular arc line;

during the driving of the driving structure, the ninth meshing line is meshed with the twelfth meshing line, or the tenth meshing line is meshed with the eleventh meshing line.

Optionally, the first bevel gear and/or the second bevel gear comprises a main body structure and a meshing structure, the drive member or carrier member being integrally formed with the main body structure of the first bevel gear or the main body structure of the second bevel gear.

Optionally, the main body structure comprises a meshing tooth and a meshing tooth groove, and the meshing structure comprises a first meshing part positioned outside the meshing tooth and a second meshing part positioned outside the meshing tooth groove; the edge of the first meshing part and the edge of the second meshing part are both arc-shaped, a plurality of rolling pieces are arranged on the outer side of the edge of the first meshing part and/or the outer side of the edge of the second meshing part, the rolling pieces can roll along the meshing direction, and the plurality of rolling pieces form the meshing position of the first meshing part and/or the second meshing part.

Optionally, the mating angle of the first bevel gear and the second bevel gear is greater than 0 and less than or equal to 90 °.

Optionally, the mating angle of the first bevel gear and the second bevel gear is 30 °, 45 °, 60 °, or 90 °.

Optionally, on a first circular surface which is perpendicular to the axis of the first bevel gear and takes the axis of the first bevel gear as a center, the projection of the first meshing tooth extends in a radial direction of the first circular surface passing through one end of the first meshing tooth; on a second circular surface which is perpendicular to the axis of a second bevel gear and takes the axis of the second bevel gear as a circle center, the extending direction of the projection of the second meshing tooth is the radial direction of the second circular surface passing through one end of the second meshing tooth;

or, on a first circular surface which is perpendicular to the axis of the first bevel gear and takes the axis of the first bevel gear as a circle center, a first included angle is formed between at least one part of the extending direction of the projection of the first meshing tooth and the radial direction of one end of the first circular surface, which passes through the first meshing tooth, and the first included angle is larger than 0 degree and smaller than 90 degrees; on a second circular surface which is perpendicular to the axis of the second bevel gear and takes the axis of the second bevel gear as a circle center, a second included angle is formed between at least one part of the extending direction of the projection of the second meshing tooth and the radial direction of one end of the second circular surface, which passes through the second meshing tooth, and the second included angle is larger than 0 degree and smaller than 90 degrees.

In a second aspect, an embodiment of the present disclosure provides a transmission structure based on a bevel gear, which adopts the following technical solutions:

the transmission structure based on the bevel gears comprises a first bevel gear and at least two second bevel gears, wherein each second bevel gear is used for being meshed with the first bevel gear to drive the first bevel gear; wherein the content of the first and second substances,

the first bevel gear comprises first meshing teeth and first meshing tooth grooves which are circumferentially arranged, and on the cross section of the first bevel gear, the meshing positions of the first meshing teeth and the first meshing tooth grooves are both arc-shaped meshing lines;

in the transmission process of the transmission structure, at the same time, the meshing modes of the second bevel gears and the first bevel gears are the same.

The embodiment of the disclosure provides a transmission structure based on bevel gears, and on one hand, the transmission structure comprises a first bevel gear and two second bevel gears, the two second bevel gears are used for driving the first bevel gear, and in the transmission process of the transmission structure, the meshing modes of the two second bevel gears and the first bevel gear are mutually supplemented at the same moment, so that the stability of the transmission structure can be improved, and even if the meshing teeth or the meshing tooth grooves of the first bevel gear or the second bevel gears are worn, the transmission effect cannot be seriously influenced; on the other hand, on the cross section of the first bevel gear, the meshing parts of the first meshing teeth and the first meshing tooth grooves are all arc-shaped meshing lines, so that in the extending direction of the first bevel gear, the meshing line of the first meshing teeth forms a meshing surface, the meshing line of the first meshing tooth grooves also forms a meshing surface, similarly, in the extending direction of the second bevel gear, the meshing line of the second meshing teeth of the second bevel gear forms a meshing surface, and the meshing line of the second meshing tooth grooves also forms a meshing surface.

The foregoing description is only an overview of the technical solutions of the present disclosure, and in order to make the technical means of the present disclosure more clearly understood, the present disclosure may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present disclosure more clearly understood, the following preferred embodiments are specifically illustrated below, and the detailed description is given in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings needed to be used in the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a block diagram of a first transmission configuration provided by an embodiment of the present disclosure;

fig. 2 is a structural view of a first bevel gear provided in the embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a first bevel gear provided in an embodiment of the present disclosure;

FIG. 4 is a block diagram of a second bevel gear provided in an embodiment of the present disclosure;

FIG. 5 is a cross-sectional view of a second bevel gear provided in an embodiment of the present disclosure;

FIG. 6 is a first schematic diagram illustrating a first bevel gear and a second bevel gear engaging with each other according to an embodiment of the present disclosure;

FIG. 7 is a first schematic view of another engagement of the first bevel gear and the second bevel gear provided by the embodiment of the present disclosure;

fig. 8 is a schematic view illustrating a second engagement manner of the first bevel gear and the second bevel gear according to the embodiment of the present disclosure;

FIG. 9 is a block diagram of a second transmission configuration provided by embodiments of the present disclosure;

FIG. 10 is a block diagram of a second type of first bevel gear provided in an embodiment of the present disclosure;

FIG. 11 is a block diagram of a third first bevel gear provided in accordance with an embodiment of the present disclosure;

FIG. 12 is a cross-sectional view of a second type of first bevel gear provided in accordance with an embodiment of the present disclosure;

FIG. 13 is an enlarged partial view of a fourth first bevel gear provided in accordance with an embodiment of the present disclosure;

FIG. 14 is a cross-sectional view of a fifth first bevel gear provided in accordance with an embodiment of the present disclosure;

FIG. 15 is a cross sectional view of a sixth first bevel gear provided in accordance with an embodiment of the present disclosure;

FIG. 16 is a cross sectional view of a seventh first bevel gear according to an embodiment of the present disclosure;

FIG. 17 is a cross-sectional view of an eighth first bevel gear provided in accordance with an embodiment of the present disclosure;

FIG. 18 is a first block diagram of an edge of a first engagement portion according to an exemplary embodiment of the present disclosure;

FIG. 19 is a cross-sectional view taken along direction FF' of FIG. 18 provided by an embodiment of the present disclosure;

FIG. 20 is a second block diagram of an edge of a first engagement portion in accordance with an exemplary embodiment of the present disclosure;

fig. 21 is a cross-sectional view along FF' of fig. 20 provided by an embodiment of the present disclosure.

FIG. 22 is a first schematic diagram illustrating a first mating angle of the first bevel gear and the second bevel gear according to an embodiment of the present disclosure;

fig. 23 is a second schematic view illustrating the fitting angle of the first bevel gear and the second bevel gear according to the embodiment of the present disclosure;

fig. 24 is a third schematic view illustrating the fitting angle of the first bevel gear and the second bevel gear according to the embodiment of the present disclosure;

fig. 25 is a fourth schematic view illustrating the fitting angle of the first bevel gear and the second bevel gear provided in the embodiment of the present disclosure;

fig. 26 is a schematic view showing the fitting angle of the first bevel gear and the second bevel gear according to the embodiment of the present disclosure;

fig. 27 is a first schematic view illustrating an extending direction of a projection of a first tooth system according to an embodiment of the present disclosure;

fig. 28 is a schematic view illustrating a second extending direction of a projection of the first engaging tooth according to the embodiment of the disclosure;

FIG. 29 is a second schematic view of a first bevel gear and a second bevel gear meshing in accordance with an embodiment of the present disclosure;

fig. 30 is a third schematic view of the engagement manner of the first bevel gear and the second bevel gear provided in the embodiment of the present disclosure.

Detailed Description

The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. Technical solutions of the present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Unless otherwise indicated, the illustrated exemplary embodiments/examples are to be understood as providing exemplary features of various details of some ways in which the technical concepts of the present disclosure may be practiced. Thus, unless otherwise indicated, the features of the various embodiments/examples may be additionally combined, separated, interchanged, and/or rearranged without departing from the technical concept of the present disclosure.

The use of cross-hatching and/or shading in the drawings is generally used to clarify the boundaries between adjacent components. As such, unless otherwise specified, the presence or absence of cross-hatching or shading does not convey or indicate any preference or requirement for a particular material, material property, size, proportion, commonality among the illustrated components and/or any other characteristic, attribute, property, etc., of a component. Further, in the drawings, the size and relative sizes of components may be exaggerated for clarity and/or descriptive purposes. While example embodiments may be practiced differently, the specific process sequence may be performed in a different order than that described. For example, two processes described consecutively may be performed substantially simultaneously or in reverse order to that described. In addition, like reference numerals denote like parts.

When an element is referred to as being "on" or "on," "connected to" or "coupled to" another element, it can be directly on, connected or coupled to the other element or intervening elements may be present. However, when an element is referred to as being "directly on," "directly connected to" or "directly coupled to" another element, there are no intervening elements present. For purposes of this disclosure, the term "connected" may refer to physically, electrically, etc., and may or may not have intermediate components.

For descriptive purposes, the present disclosure may use spatially relative terms such as "under 8230; \8230;,"' under 8230; \8230; below 8230; under 8230; above, on, above 8230; higher "and" side (e.g., as in "side wall)", etc., to describe the relationship of one component to another (other) component as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and/or manufacture in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "at 8230; \8230;" below "may encompass both an orientation of" above "and" below ". Moreover, the devices may be otherwise positioned (e.g., rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, when the terms "comprises" and/or "comprising" and variations thereof are used in this specification, the stated features, integers, steps, operations, elements, components and/or groups thereof are stated to be present but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groups thereof. It is also noted that, as used herein, the terms "substantially," "about," and other similar terms are used as approximate terms and not as degree terms, and as such, are used to interpret inherent deviations in measured values, calculated values, and/or provided values that would be recognized by one of ordinary skill in the art.

The disclosed embodiment provides a transmission structure based on bevel gears (hereinafter referred to as transmission structure), specifically, as shown in fig. 1, the transmission structure includes a first bevel gear 10 and two second bevel gears 20, and the two second bevel gears 20 are used for being engaged with the first bevel gear 10 to drive the first bevel gear 10. Wherein, the first and the second end of the pipe are connected with each other,

as shown in fig. 2, the first bevel gear 10 includes a first meshing tooth 11 and a first meshing tooth groove 12 arranged in a circumferential direction, and in a cross section of the first bevel gear 10, as shown in fig. 3, meshing portions of the first meshing tooth 11 and the first meshing tooth groove 12 are both arc-shaped meshing lines (shown by 114 and 124 in fig. 3).

As shown in fig. 4, the second bevel gear 20 includes a second meshing tooth 21 and a second meshing tooth groove 22 arranged in the circumferential direction, and on the cross section of the second bevel gear 20, as shown in fig. 5, the meshing positions of the second meshing tooth 21 and the second meshing tooth groove 22 are both arc-shaped meshing lines (shown as 214 and 224 in fig. 5).

As shown in fig. 6 to 8, during the driving of the driving structure, the two second bevel gears 20 are engaged with the first bevel gear 10 at the same time in a complementary manner.

The transmission structure with the structure at least has the following technical effects:

on one hand, since the transmission structure includes the first bevel gear 10 and the two second bevel gears 20, both the two second bevel gears 20 are used for driving the first bevel gear 10, and the two second bevel gears 20 and the first bevel gear 10 are engaged in a complementary manner at the same time in the transmission process of the transmission structure, the stability of the transmission structure can be improved, and even if the engaging teeth or the engaging tooth grooves of the first bevel gear 10 or the second bevel gear 20 are worn, the transmission effect is not seriously affected.

On the other hand, on the cross section of the first bevel gear 10, the meshing positions of the first meshing teeth 11 and the first meshing tooth grooves 12 are both arc-shaped meshing lines, so that in the extending direction of the first bevel gear 10, the meshing line of the first meshing teeth 11 forms a meshing surface, and the meshing line of the first meshing tooth grooves 12 also forms a meshing surface, similarly, in the extending direction of the second bevel gear 20, the meshing line of the second meshing teeth 21 of the second bevel gear 20 forms a meshing surface, and the meshing line of the second meshing tooth grooves 22 also forms a meshing surface, so that in the transmission process of the transmission structure, the first bevel gear 10 and the second bevel gear 20 are meshed through the meshing surfaces, the surface abrasion is generated in the transmission process, the contact area is increased, the wear resistance is improved, the service life is effectively prolonged, and the tooth profiles of the first meshing teeth 11 and the second meshing teeth 21 are firmer, can be made larger and firmer under the same modulus, and the strength and the wear resistance are improved.

In addition, two second bevel gears 20 share still to have and reduce resonance, and the atress is more even, and average stress surface and effort operate more steadily, and double stress surface effort is divided equally, improves the effect of bearing capacity more.

The above "engagement means complement each other" may be such that the engagement degrees complement each other, or the engagement portions complement each other.

In one example, at the same time, as shown in fig. 6, the meshing portion of one second bevel gear 20 is completely meshed with the meshing portion of the first bevel gear 10 (the position shown by the broken line circle in fig. 6), and as shown in fig. 7, there is a gap between the meshing portion of the other second bevel gear 20 and the meshing portion of the first bevel gear 10 (the position shown by the broken line circle in fig. 7). This can be achieved in particular by adjusting the relative position between each second bevel gear 20 and first bevel gear 10. In the example shown in fig. 6 and 7, the second engagement tooth groove 22 of one second bevel gear 20 is completely engaged with the first engagement tooth 11 of the first bevel gear 10, and a gap exists between the second engagement tooth groove 22 of the other second bevel gear 20 and the first engagement tooth 11 of the first bevel gear 10. Of course, it is also possible that the second meshing teeth 21 of one second bevel gear 20 are completely meshed with the first meshing tooth grooves 12 of the first bevel gear 10, and a gap exists between the second meshing teeth 21 of the other second bevel gear 20 and the first meshing tooth grooves 12 of the first bevel gear 10.

It should be noted that the above "same time" does not mean a specific time, but means a time when the above meshing relationship between different second bevel gears 20 and first bevel gear 10 exists during the transmission. During the entire transmission, there are a plurality of the above-mentioned times, taking two times that one second bevel gear 20 is adjacent to each other in front and back as an example, if the second bevel gear 20 is completely engaged with the first bevel gear 10 at the present time, there is a gap between the second bevel gear 20 and the first bevel gear 10 at the next time, and if the second bevel gear 20 is completely engaged with the first bevel gear 10 at the present time, the second bevel gear 20 is completely engaged with the first bevel gear 10 at the next time.

In the transmission process of the transmission structure with the structure, the meshing effect of the two second bevel gears 20 and the first bevel gear 10 can realize dynamic compensation, namely one is completely meshed, and the other has a gap, so that the effect shared by the two second bevel gears 20 can be further improved, and the reverse gap can be effectively reduced.

In still another example, at the same time, as shown in fig. 6, the second meshing tooth grooves 22 of one second bevel gear 20 mesh with the first meshing teeth 11 of the first bevel gear 10 (concave-to-convex, position shown by the dotted circle in fig. 6), and as shown in fig. 8, the second meshing teeth 21 of the other second bevel gear 20 mesh with the first meshing tooth grooves 12 of the first bevel gear 10 (convex-to-concave, position shown by the dotted circle in fig. 8). Based on the above situation, in the transmission process of the transmission structure, the meshing positions between the two second bevel gears 20 and the first bevel gear 10 are just opposite, which not only can further improve the effect shared by the two second bevel gears 20, but also can help to realize that the error is equally divided, and further improve the operation precision.

It should be noted that the above "same time" does not mean a specific time, but means a time when the two second bevel gears 20 and the first bevel gear 10 are in the above meshing relationship during the transmission.

Optionally, as shown in fig. 9, in the embodiment of the present disclosure, the transmission structure further includes a third bevel gear 30, and the two second bevel gears 20 are further configured to engage with the third bevel gear 30 to drive the third bevel gear 30; the third bevel gear 30 includes a third meshing tooth and a third meshing tooth groove arranged along the circumferential direction, and on the cross section of the third bevel gear 30, the meshing positions of the third meshing tooth and the third meshing tooth groove are both arc-shaped meshing lines, which can be referred to in the related drawings of the first bevel gear 10 and the second bevel gear 20.

Alternatively, as shown in fig. 9, in the disclosed embodiment, two second bevel gears 20 are disposed opposite to each other, and first bevel gear 10 and third bevel gear 30 are disposed opposite to each other.

Optionally, as shown in fig. 1 and 9, in the embodiment of the present disclosure, the transmission structure further includes at least one driving element 40 and/or carrier member 50, and the driving element 40 and/or the carrier member 50 is fixedly connected to the first bevel gear 10 and/or the second bevel gear 20.

Alternatively, the driver 40 is a gear, an inner gear ring, an outer gear ring, or a drive shaft, etc.; the frame member 50 is a holed chassis or a holeless chassis, etc.

Alternatively, the driving member 40 or the carrier member 50 is integrally formed with the first bevel gear 10 or the second bevel gear 20 to improve the strength of the transmission structure and simplify the manufacturing process of the transmission structure. Illustratively, first bevel gear 10 and second bevel gear 20 may have the following specific structures:

first, as shown in fig. 10, 11 and 12, in a cross section of the first bevel gear 10, the first meshing tooth 11 is composed of a first meshing line 111, a first top side line 112 and a second meshing line 113 which are sequentially connected end to end, the first meshing line 111 and the second meshing line 113 are circular arc lines which are in a same circle and have a first radius, the first top side line 112 is a circular arc line having a second radius, the second radius is larger than the first radius, the first meshing tooth groove 12 is composed of a third meshing line 121, a first bottom side line 122 and a fourth meshing line 123 which are sequentially connected end to end, the third meshing line 121 and the fourth meshing line 123 are circular arc lines which are in a same circle and have a third radius, and the first bottom side line 122 is a circular arc line having a fourth radius.

Similarly, in the cross section of the second bevel gear 20, the second meshing tooth 21 is composed of a fifth meshing line, a second top side line and a sixth meshing line which are sequentially connected end to end, the fifth meshing line and the sixth meshing line are circular arc lines which are connected end to end and have a first radius, the second top side line is a circular arc line which has a second radius, the second meshing tooth socket 22 is composed of a seventh meshing line, a second bottom side line and an eighth meshing line which are sequentially connected end to end, the seventh meshing line and the eighth meshing line are circular arc lines which are connected end to end and have a third radius, and the second bottom side line is a circular arc line which has a fourth radius. The structural view of the second bevel gear 20 can refer to fig. 10, 11 and 12.

During the driving of the driving structure, the first meshing line 111 and the second meshing line 113 mesh with the seventh meshing line and the eighth meshing line, or the third meshing line 121 and the fourth meshing line 123 mesh with the fifth meshing line and the sixth meshing line.

Since the second radius is larger than the first radius, so that the protruding degree of the first top side line 112 (or the second top side line) is smaller than the protruding degree of the first meshing line 111 and the second meshing line 113 (or the fifth meshing line and the sixth meshing line), the first bevel gear 10 (or the second bevel gear 20) can have a smaller size in cross section, and the first bevel gear can be suitable for a smaller space and/or a more compact space for arranging components under the condition of ensuring a better meshing effect.

Alternatively, in the embodiment of the present disclosure, as shown in fig. 10, the curvature (or the degree of the arc center angle) of the first meshing line 111 and the curvature (or the degree of the arc center angle) of the second meshing line 113 are kept constant along the axial direction of the first bevel gear 10, and at this time, the first radius is gradually increased along the axial direction of the first bevel gear 10, and the arc length of the first meshing line 111 and the arc length of the second meshing line 113 are gradually increased. Alternatively, as shown in fig. 11, the arc length of the first meshing line 111 and the arc length of the second meshing line 113 are kept constant along the axial direction of the first bevel gear 10, and at this time, the first radius is gradually increased along the axial direction of the first bevel gear 10, and the arc degree (or the degree of the arc center angle) of the first meshing line 111 and the arc degree (or the degree of the arc center angle) of the second meshing line 113 are gradually decreased. The skilled person can select the first bevel gear 10 with a suitable configuration according to the actual requirements. Second bevel gear 20 may also have a similar construction and will not be described in detail herein.

Alternatively, in the embodiment of the present disclosure, the arc center of the first top-side line 112 is the center of the first bevel gear 10, that is, the first top-side lines 112 included in all the first meshing teeth 11 are located on the same circumference with the center of the first bevel gear 10 as the center. With such an arrangement, the first bevel gear 10 can be designed more simply, the first top sidelines 112 of all the first meshing teeth 11 can be designed by designing a circle with the center of the first bevel gear 10 as the center, and the size and the like of each first top sideline 112 can be adjusted by adjusting the radius of the circle. Likewise, the second top side line of second bevel gear 20 is of the same design and will not be described in detail here.

Alternatively, in the disclosed embodiment, as shown in fig. 12, the central angles of the first meshing line 111, the second meshing line 113, the third meshing line 121, and the fourth meshing line 123 of the first bevel gear 10 are the same, and the third radius is the same as or similar to the first radius. Likewise, the fifth meshing line, the sixth meshing line, the seventh meshing line and the eighth meshing line of the second bevel gear 20 are also designed identically, and are not described again here.

Further, embodiments of the present disclosure select the third radius to be slightly larger than the first radius. The above "slightly larger" makes it possible for the first meshing line 111 and the second meshing line 113 to smoothly achieve engagement and disengagement with the seventh meshing line and the eighth meshing line, avoiding seizure, and makes it possible for the third meshing line 121 and the fourth meshing line 123 to smoothly achieve engagement and disengagement with the fifth meshing line and the sixth meshing line, avoiding seizure. The size range of "slightly larger" can be selected by the skilled person according to the actual need, for example, the third radius is 0.05 μm, 0.1 μm, 0.2 μm, 0.5 μm, etc. larger than the first radius.

In addition, the second radius is greater than or equal to the fourth radius, that is, in the case where the first engaging tooth 11 has the same dimension in the width direction (the direction indicated by the arrow of the broken line in fig. 12), the degree of protrusion of the first top edge line 112 is smaller than or equal to the degree of protrusion of the bottom edge line 122, and in the case where the second engaging tooth 21 has the same dimension in the width direction, the degree of protrusion of the second top edge line is smaller than or equal to the degree of protrusion of the second bottom edge line. Optionally, in the embodiment of the present disclosure, as shown in fig. 12, the second radius is larger than the fourth radius, and further, in the embodiment of the present disclosure, the fourth radius is the same as the third radius, and the first bottom side line 122 is concentric with the third meshing line 121 and the fourth meshing line 123, and the second bottom side line is concentric with the seventh meshing line and the eighth meshing line, so as to simplify the design and manufacturing processes of the first bevel gear 10 and the second bevel gear 20.

Alternatively, in the embodiment of the present disclosure, as shown in fig. 12, in the width direction of the first engaging tooth 11, the size of the first top edge line 112 is smaller than the maximum distance between the first meshing line 111 and the second meshing line 113, so that the sizes of the first meshing line 111 and the second meshing line 113 are larger to further improve the meshing area and the transmission effect of the first engaging tooth 11. Likewise, the second toothing 21 is of the same design and will not be described in detail here.

Alternatively, in the embodiment of the present disclosure, as shown in fig. 12, the first bevel gear 10 includes only the first engaging tooth 11 and the first engaging tooth groove 12; in the cross section of the first bevel gear 10, the arc center of the first meshing line 111 and the arc center of the third meshing line 121 are the same distance from the center of the first bevel gear 10, i.e., in the orientation shown in fig. 12, the arc centers of the first meshing line 111 and the third meshing line 121 are on the same circumference centered on the center of the first bevel gear 10. Likewise, the second bevel gear 20 is of the same design and will not be described in detail here. Under the condition, in the transmission process of the transmission structure, the operation is stable, and the vibration is small.

Alternatively, in the embodiment of the present disclosure, as shown in fig. 13, the first bevel gear 10 further includes a first connecting portion 13 between the first engaging tooth 11 and the first engaging tooth groove 12; in the cross section of the first bevel gear 10, a first distance is provided between an arc center (indicated by a black dot on the left side in fig. 13) of the first meshing line 111 and a center (not shown in fig. 13) of the first bevel gear 10, and a second distance, which is smaller than the first distance, is provided between an arc center (indicated by a black dot on the right side in fig. 13) of the third meshing line 121 and the center of the first bevel gear 10, that is, in the cross section of the first bevel gear 10, the arc center of the first meshing line 111 and the arc center of the third meshing line 121 are located on different circumferences centered on the center of the first bevel gear 10. Likewise, the second bevel gear 20 is of the same design and will not be described in detail here. In this case, there are speed change and vibration effects during the transmission of the transmission structure.

Alternatively, as shown in fig. 13, in a cross section of the first bevel gear 10, the first connecting portion 13 includes a first connecting line 131 protruding outward and a second connecting line 132 recessed inward in an end-to-end connection, the first connecting line 131 is connected to the first engaging tooth 11, and the second connecting line 132 is connected to the first engaging tooth groove 12; the first connecting line 131 and the second connecting line 132 are both arcs. Likewise, the second bevel gear 20 is of the same design and will not be described in detail here. When the first bevel gear 10 and the second bevel gear 20 have the above structure, it is possible to contribute to further increasing the meshing area between the first bevel gear 10 and the second bevel gear 20.

Further, as shown in fig. 13, the first connecting line 131 is a circular arc line that is concentric with the first meshing line 111, and the second connecting line 132 is a circular arc line that is concentric with the third meshing line 121. In this case, the first connecting line 131 and/or the second connecting line 132 may also be engaged during the driving of the driving structure, thereby further increasing the engagement area. Likewise, the second bevel gear 20 is of the same design and will not be described in detail here.

Secondly, as shown in fig. 3, in a cross section of the first bevel gear 10, the first meshing tooth 11 has a ninth meshing line 114 that is convex outward, the ninth meshing line 114 is a circular arc line, the first meshing tooth groove 12 has a tenth meshing line 124 that is concave inward, and the tenth meshing line 124 is a circular arc line;

as shown in fig. 5, in a cross section of the second bevel gear 20, the second meshing tooth 21 has an eleventh meshing line 214 that is convex outward, the eleventh meshing line 214 is a circular arc line, the second meshing tooth groove 22 has a twelfth meshing line 224 that is concave inward, and the twelfth meshing line 224 is a circular arc line;

during the driving of the driving structure, the ninth meshing line 114 meshes with the twelfth meshing line 224, or the tenth meshing line 124 meshes with the eleventh meshing line 214.

Optionally, in the disclosed embodiment, the radius of the ninth meshing line 114 is similar to or equal to the radius of the twelfth meshing line 224, and the radius of the tenth meshing line 124 is similar to or equal to the radius of the eleventh meshing line 214.

Further, the disclosed embodiment selects the radius of the twelfth meshing line 224 to be slightly larger than the radius of the ninth meshing line 114, and the radius of the tenth meshing line 124 to be slightly larger than the radius of the eleventh meshing line 214. The above "slightly larger" makes the ninth meshing line 114 smoothly engage with and disengage from the twelfth meshing line 224 to avoid the deadlocking, and the tenth meshing line 124 smoothly engages with and disengages from the eleventh meshing line 214 to avoid the deadlocking. The size range of "slightly larger" can be selected by the skilled person according to the actual needs, for example, the radius of the twelfth meshing line 224 is 0.05 μm, 0.1 μm, 0.2 μm, 0.5 μm, etc. larger than the radius of the ninth meshing line 114, and the radius of the tenth meshing line 124 is 0.05 μm, 0.1 μm, 0.2 μm, 0.5 μm, etc. larger than the radius of the eleventh meshing line 214.

Alternatively, as shown in fig. 3, in the presently disclosed embodiment, the first bevel gear 10 includes only the first meshing tooth 11 and the first meshing tooth groove 12, and the arc center of the ninth meshing line 114 (indicated by a lower left black dot in fig. 3) and the arc center of the tenth meshing line 124 (indicated by an upper left black dot in fig. 3) are the same distance as the center of the first bevel gear 10 (indicated by a central black dot in fig. 3), i.e., in the orientation shown in fig. 3, the arc center of the ninth meshing line 114 and the arc center of the tenth meshing line 124 are on the same circumference centered on the center of the first bevel gear 10. Likewise, the second bevel gear 20 is of the same design and will not be described in detail here. Under the condition, the operation is stable and the vibration is small in the transmission process of the transmission structure.

Optionally, in the embodiment of the present disclosure, the first bevel gear 10 further includes a first connecting portion between the first meshing tooth 11 and the first meshing tooth groove 12, an arc center of the ninth meshing line 114 has a first distance from a center of the first bevel gear 10, and an arc center of the tenth meshing line 124 has a second distance from the center of the first bevel gear 10, the second distance being smaller than the first distance, that is, in the orientation of the cross section of the first bevel gear 10, the arc center of the ninth meshing line 114 and the arc center of the tenth meshing line 124 are on different circumferences centered on the center of the first bevel gear 10. Likewise, the second bevel gear 20 is of the same design and will not be described in detail here. In this case, there are speed change and vibration effects during the transmission of the transmission structure. The drawings are not provided here, and the above structure can be simply obtained by those skilled in the art on the basis of fig. 13.

Optionally, the first connecting portion includes a first connecting line protruding outwards and a second connecting line recessed inwards, the first connecting line is connected with the first engaging tooth 11, the second connecting line is connected with the first engaging tooth groove 12, and the first connecting line and the second connecting line are both arc lines. Likewise, the second bevel gear 20 is of the same design and will not be described in detail here. When the first bevel gear 10 and the second bevel gear 20 have the above structure, the meshing area of the first bevel gear 10 and the second bevel gear 20 can be further increased.

Further, in the embodiment of the present disclosure, the first connecting line of the first connecting portion is a circular arc line that is concentric with the ninth meshing line 114; the second connecting line is a circular arc line which is concentric with the tenth meshing line 124. Likewise, the second bevel gear 20 is of the same design and will not be described in detail here. In this case, the first connecting line and/or the second connecting line can also be engaged during the driving of the driving structure, thereby further increasing the engagement area of the first bevel gear 10 with the second bevel gear 20.

Alternatively, in the embodiment of the present disclosure, the ninth meshing line 114 and the tenth meshing line 124 are both circular arc lines having a radian pi, and the eleventh meshing line 214 and the twelfth meshing line 224 are also circular arc lines having a radian pi, that is, half of the entire circumference, so that the meshing area of the first bevel gear 10 and the second bevel gear 20 is further increased.

It should be added that the two types of first bevel gears 10 and the second bevel gears 20 can be processed by milling, and then the driving member and/or the frame member included in the transmission structure can be integrally formed with the first bevel gears 10 or the second bevel gears 20, so that the assembly stages are reduced, the number of parts can be greatly reduced, the number of assembly stages is greatly reduced, the error of multi-stage assembly precision is greatly reduced, various comprehensive instability is greatly reduced, the number of fasteners or positioning pieces can be greatly reduced, the whole structure has stronger rigidity, and the whole structure precision and the retentivity are stronger.

In addition, the above two kinds of first bevel gears 10 and second bevel gears 20 in the disclosed embodiment also have the following technical advantages: the stress is uniform; the contact area is large, and the wear resistance is higher; the meshing surfaces are tightly meshed, so that the running precision is improved, the stress area is greatly improved compared with the prior art, and the bearing capacity is improved; the measurement accuracy error is convenient.

Alternatively, as shown in fig. 14 to 17, the first bevel gear 10 and/or the second bevel gear 20 includes a main body structure 60 and a meshing structure 70, and the driving member 40 or the carrier member 50 is integrally formed with the main body structure 60 (the main body structure of the first bevel gear 10 or the main body structure of the second bevel gear 20).

Alternatively, as shown in fig. 14 to 17, the main body structure 60 includes the engaging tooth 61 and the engaging tooth groove 62, and the engaging structure 70 includes a first engaging portion 71 located outside the engaging tooth 61, and a second engaging portion 72 located outside the engaging tooth groove 62; the edges of the first engaging portion 71 and the second engaging portion 72 are arc-shaped, a plurality of rolling members 73 are arranged outside the edges of the first engaging portion 71 and/or the second engaging portion 72, the rolling members 73 can roll along the engaging direction, and the plurality of rolling members 73 form the engaging position of the first engaging portion 71 and/or the second engaging portion 72.

The main structure 60 can be processed by milling, and the driving element 40 and/or the frame element 50 included in the transmission structure can be integrally formed with the main structure 60 of the first bevel gear 10 or the second bevel gear 20, so that the assembly stages are reduced, the number of parts can be greatly reduced, the number of assembly stages is greatly reduced, the multi-stage assembly precision error is greatly reduced, various comprehensive instability is greatly reduced, the number of fasteners or positioning pieces can be greatly reduced, the whole structure has stronger rigidity, and the integral structure precision and the retentivity are stronger.

The above "first engaging portion 71 and/or second engaging portion 72" includes three cases: first, a first engaging portion 71 and a second engaging portion 72; second, only the first engaging portion 71; third, only the second engaging portion 72. The rolling members 73 may be distributed over the entire outside of the edges of the first engaging portion 71 and/or the second engaging portion 72, i.e., all the engaging positions of the first engaging portion 71 and/or the second engaging portion 72 are the rolling members 73; alternatively, the rolling members 73 are distributed at partial positions outside the edges of the first engagement portion 71 and/or the second engagement portion 72, i.e., the partial engagement positions of the first engagement portion 71 and/or the second engagement portion 72 are the rolling members 73.

Because the plurality of rolling members 73 are arranged outside the edges of the first meshing part 71 and/or the second meshing part 72, the rolling members 73 can roll along the meshing direction, and the plurality of rolling members 73 form the meshing position of the first meshing part 71 and/or the second meshing part 72, and in the use process of the transmission structure, the rolling members 73 roll along the meshing direction, so that the rolling friction is formed between the first bevel gear 10 and the second bevel gear 20, the transmission resistance is small, and the mechanical efficiency can be greatly improved.

In addition, it should be added that the above first bevel gear 10 and/or second bevel gear 20 also have the following technical advantages: the stress is uniform; the contact area is large, and the wear resistance is higher; the meshing surfaces are tightly meshed, so that the running precision is improved, the stressed area is double or even higher than that of the prior art, and the bearing capacity is improved; the measurement accuracy error is convenient.

Alternatively, as shown in fig. 14, a plurality of rolling members 73 are provided outside the edges of the first engaging portion 71 and the second engaging portion 72. In this case, both the first engagement portion 71 and the second engagement portion 72 can achieve the effect of rolling friction during use of the transmission structure.

Further, as shown in fig. 18 to 21, in the embodiment of the present disclosure, a first guide 74 is provided on an outer side of each of the first engagement portion 71 and the second engagement portion 72, the first guide 74 has a first rolling space in which the rolling members 73 roll in the engagement direction (a direction indicated by arrows in fig. 18 and 20), and the plurality of rolling members 73 are placed in the first rolling space. In the example shown in fig. 18 and 19, the rolling member 73 is a ball, and in the example shown in fig. 20 and 21, the rolling member 73 is a needle roller. It should be noted that, when the rolling member 73 is a ball, the number and/or diameter of the ball are different at the cross section of the first engagement portion 71 or the second engagement portion 72 at different positions, so as to realize the shape of the bevel gear; when the rolling member 73 is a needle roller, as shown in fig. 21, the diameter of the needle roller is gradually changed, and the diameter of the needle roller is directly increased or decreased gradually (specifically, determined according to the direction of the needle roller and the bevel gear) from one end to the other end to realize the shape of the bevel gear.

For example, a first guide 74 is provided outside the first engaging portion 71, and one, two or more rows of rolling elements 73 may be disposed in the first guide 74 in the axial direction of the transmission structure; alternatively, two or more first guides 74 are provided outside the first engaging portion 71, and a row of rolling members 73 is placed in each first guide 74 in the axial direction of the transmission structure. Of course, the outer first guiding element 74 of the second engaging portion 72 can be similarly disposed, and will not be described herein.

Further, in the disclosed embodiment, as shown in fig. 19 and 21, in the axial direction (the direction indicated by the arrow in fig. 19 and 21) of the first bevel gear 10 or the second bevel gear 20, the size of the first rolling space is slightly larger than that of the rolling members 73, that is, each first guide 74 places only one row of rolling members 73, and the first guide 74 limits the movement of the rolling members 73 in the axial direction of the first bevel gear 10, so as to further reduce the transmission resistance and improve the mechanical efficiency.

The structure of the first guide 74 is only an example, and those skilled in the art can arrange the first guide according to actual needs.

Alternatively, as shown in fig. 15 and 16, in the embodiment of the present disclosure, only the outer side of the edge of the first engaging portion 71 is provided with the plurality of rolling members 73.

Alternatively, as shown in fig. 15, in the embodiment of the present disclosure, the first engaging portion 71 includes a fixed shaft 75 located at the center, and the axial direction of the fixed shaft 75 is parallel to the axial direction of the first bevel gear 10 or the second bevel gear 20; a second guide 76 is provided on the circumference of the fixed shaft 75, the second guide 76 having a second rolling space in which the rolling members 73 roll in the engagement direction, and the plurality of rolling members 73 are placed in the second rolling space. In fig. 15, in order to clearly show the position relationship between the fixed shaft 75 and the rolling member 73, the structure of the second guide 76 is simplified or partially hidden, and those skilled in the art may refer to the specific structure and number of the first guide 74, the placement manner of the rolling member 73, etc., and set the specific structure and number of the second guide 76, the placement manner of the rolling member 73, etc., which will not be described herein again.

Similarly, a second guide 76 is provided outside the fixed shaft 75, and one, two or more rows of rolling elements 73 can be placed in the second guide 76 in the axial direction of the fixed shaft 75; alternatively, two or more second guides 76 are provided on the outer side of the stationary shaft 75, and a row of rolling elements 73 is placed in each of the second guides 76 in the axial direction of the stationary shaft 75.

Further, in the embodiment of the present disclosure, in the axial direction of the fixed shaft 75, the size of the second rolling space is slightly larger than that of the rolling members 73, that is, only one row of rolling members 73 is placed on each second guiding member 60, and the second guiding member 76 limits the movement of the rolling members 73 in the axial direction of the fixed shaft 75, so as to further reduce the transmission resistance and improve the mechanical efficiency.

Alternatively, in the embodiment of the present disclosure, a third guide member is disposed outside the first engaging portion 71, the third guide member has a third rolling space in which the rolling members 73 roll in the engaging direction, and the plurality of rolling members 73 are placed in the third rolling space. Those skilled in the art can set the specific structure, number, placement of the rolling members 73, etc. of the third guide member by referring to the specific structure, number, placement of the rolling members 73, etc. of the first guide member 74, which will not be described herein again.

Further, in the embodiment of the present disclosure, in the axial direction of the first bevel gear 10, the size of the third rolling space is slightly larger than the size of the rolling elements 73, that is, only one row of rolling elements 73 is placed on each third guide, and the third guide limits the movement of the rolling elements 73 in the axial direction of the transmission structure, so as to further reduce the transmission resistance and improve the mechanical efficiency.

Of course, it is also possible for those skilled in the art to provide only the outer side of the edge of the second engaging portion 72 with the plurality of rolling members 73 as shown in fig. 17.

Alternatively, the rolling members 73 in the embodiment of the present disclosure may be balls or needles, and those skilled in the art may select other rolling members according to actual needs.

Alternatively, in the embodiment of the present disclosure, the radius of the edge of the second engaging portion 72 may be similar to or equal to the radius of the edge of the first engaging portion 71. Further, in the embodiment of the present disclosure, the radius of the edge of the second engaging portion 72 is selected to be slightly larger than the radius of the edge of the first engaging portion 71, so that the first bevel gear 10 and the second bevel gear 20 can be engaged well without being locked. The size range of "slightly larger" can be selected by those skilled in the art according to actual needs, for example, the radius of the edge of the second engaging part 72 is larger than the radius of the edge of the first engaging part 71 by 0.05 μm, 0.1 μm, 0.2 μm, 0.5 μm, and the like.

Alternatively, the main body structure 60 includes only the engaging tooth 61 and the engaging tooth groove 62, or the main body structure 60 further includes a connecting portion between the engaging tooth 61 and the engaging tooth groove 62.

Optionally, in the embodiment of the present disclosure, both the edge of the first engagement portion 71 and the edge of the second engagement portion 72 are arc lines with an arc of pi.

Alternatively, in the embodiment of the present disclosure, the mating angle of the first bevel gear 10 and the second bevel gear 20 is greater than 0 and less than or equal to 90 °, for example, 30 °, 45 °, 60 °, and 90 °, which can be selected by those skilled in the art according to actual needs, in the example shown in fig. 22, the mating angle of the first bevel gear 10 and the second bevel gear 20 is 45 °, in the example shown in fig. 23, the mating angle of the first bevel gear 10 and the second bevel gear 20 is 60 °, in the example shown in fig. 24 and 25, the mating angle of the first bevel gear 10 and the second bevel gear 20 is 90 °, and in fig. 24 and 25, the first bevel gear 10 and the second bevel gear with different structures are taken as an example. Fig. 22 to 25 are merely examples of the fitting angle to the first bevel gear 10 and the second bevel gear 20.

Alternatively, the first bevel gear 10 and the second bevel gear 20 in the embodiment of the present disclosure may be a spur gear or a helical gear, and in the example shown in fig. 24, the first bevel gear 10 and the second bevel gear 20 are spur gears, and in the example shown in fig. 26, the first bevel gear 10 and the second bevel gear 20 are helical gears.

For example, when the first bevel gear 10 and the second bevel gear 20 are spur gears, as shown in fig. 27, on a first circular surface perpendicular to the axis of the first bevel gear 10 and centered on the axis of the first bevel gear 10, the projection of the first meshing tooth 11 extends in a radial direction of the first circular surface passing through one end of the first meshing tooth 11 (only the projection of one first meshing tooth 11 is shown in fig. 27); on a second circular surface perpendicular to the axis of the second bevel gear 20 and centered on the axis of the second bevel gear 20, the projection of the second meshing tooth 21 extends in a radial direction of the second circular surface passing through one end of the second meshing tooth 21.

For another example, when the first bevel gear 10 and the second bevel gear 20 are bevel gears, as shown in fig. 28, on a first circular surface that is perpendicular to the axis of the first bevel gear 10 and centered on the axis of the first bevel gear 10, at least a part of the direction of extension of the projection of the first meshing tooth 11 and the radial direction of the first circular surface that passes through one end of the first meshing tooth 11 have a first angle (only the projection of one first meshing tooth 11 is shown in fig. 28) that is greater than 0 ° and smaller than 90 °; on a second circular surface perpendicular to the axis of the second bevel gear 20 and centered on the axis of the second bevel gear 20, at least a part of the extension direction of the projection of the second meshing tooth 21 and a radial direction of the second circular surface passing through one end of the second meshing tooth 21 have a second angle therebetween, the second angle being greater than 0 ° and smaller than 90 °, and may further be selected from 10 ° to 45 °.

Further, in the embodiment of the present disclosure, the extending path of the first engaging tooth 11 and the second engaging tooth 21 is curved (e.g., arc), broken (e.g., herringbone), or straight.

Optionally, in the embodiment disclosed, the first bevel gear 10 includes at least two first engaging teeth 11, the second bevel gear 20 includes at least two second engaging teeth 21, for example, 2, 3, 4, 5, 8, 10, 15, 20, etc., and the selectable range of the number of the first engaging teeth 11 and the second engaging teeth 21 is wider. The bevel gears in the prior art are in involute engagement, and if the number of the engagement teeth is small, an undercut problem can occur, but the first bevel gear 10 and the second bevel gear 20 in the embodiment of the disclosure are in surface engagement, and no matter how many engagement teeth are arranged, the undercut problem can not occur.

In addition, the disclosed embodiment provides a transmission structure based on bevel gears, the transmission structure comprising a first bevel gear and at least two second bevel gears, each second bevel gear being used for meshing with the first bevel gear to drive the first bevel gear; wherein, the first and the second end of the pipe are connected with each other,

the first bevel gear comprises first meshing teeth and first meshing tooth grooves which are circumferentially arranged, and on the cross section of the first bevel gear, the meshing parts of the first meshing teeth and the first meshing tooth grooves are both arc-shaped meshing lines;

the second bevel gear comprises second meshing teeth and second meshing tooth grooves which are circumferentially arranged, and on the cross section of the second bevel gear, the meshing parts of the second meshing teeth and the second meshing tooth grooves are both arc-shaped meshing lines;

in the transmission process of the transmission structure, at the same moment, the meshing modes of the second bevel gears and the first bevel gears are the same.

In one example, at the same time, the second meshing teeth of the second bevel gears are meshed with the first meshing tooth grooves of the first bevel gears, and the second meshing teeth are convex to concave.

In yet another example, as shown in fig. 29 and 30, at the same time, the second meshing tooth grooves of the respective second bevel gears (the lower bevel gear in fig. 29 and the upper bevel gear in fig. 30) are both concave-convex, and are engaged with the first meshing teeth (the positions shown by the broken-line circles in fig. 29 and 30) of the first bevel gear (the upper bevel gear in fig. 29 and the lower bevel gear in fig. 30).

It should be noted that the above "same time" does not mean a specific time, but means a time when the second bevel gears and the first bevel gears are in the above meshing relationship during the transmission.

The transmission structure may also include other structures, and the specific structures of the first bevel gear 10 and the second bevel gear 20 can be arranged as described above, and will not be described herein.

In the description of the present specification, reference to the description of "one embodiment/mode", "some embodiments/modes", "example", "specific example", or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

It will be understood by those skilled in the art that the foregoing embodiments are provided merely for clarity of explanation and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.

Claims

1. A transmission structure based on bevel gears is characterized by comprising a first bevel gear and two second bevel gears, wherein the two second bevel gears are used for being meshed with the first bevel gear to drive the first bevel gear; wherein the content of the first and second substances,

during the transmission process of the transmission structure based on the bevel gears, the meshing modes of the two second bevel gears and the first bevel gear complement each other at the same time.

2. The bevel gear based transmission structure according to claim 1, wherein at the same time, the engagement portion of one of the second bevel gears is completely engaged with the engagement portion of the first bevel gear, and a gap exists between the engagement portion of the other of the second bevel gears and the engagement portion of the first bevel gear.

3. The bevel gear-based transmission structure according to claim 1, wherein the second meshing tooth of one of the second bevel gears meshes with the first meshing tooth groove of the first bevel gear, and the second meshing tooth groove of the other of the second bevel gears meshes with the first meshing tooth of the first bevel gear at the same time.

4. The bevel gear based transmission according to claim 1, further comprising a third bevel gear, two of said second bevel gears further adapted to engage with said third bevel gear to drive said third bevel gear; the third bevel gear comprises third meshing teeth and third meshing tooth grooves which are circumferentially arranged, and on the cross section of the third bevel gear, the meshing parts of the third meshing teeth and the third meshing tooth grooves are arc-shaped meshing lines.

5. The bevel gear based transmission according to claim 4, wherein two of the second bevel gears are oppositely disposed, and the first bevel gear and the third bevel gear are oppositely disposed.

6. The bevel gear based transmission according to claim 1, further comprising at least one driving member and/or carrier member, the driving member and/or carrier member being fixedly connected with the first bevel gear and/or the second bevel gear.

7. The bevel gear based transmission according to claim 6, wherein the driving member is a gear, an inner ring gear, an outer ring gear or a drive shaft; the frame member is a holed or a holeless chassis.

8. A bevel gear based transmission arrangement according to claim 6 or 7, wherein the drive member or the carrier member is integrally formed with the first bevel gear or the second bevel gear.

9. A bevel gear based transmission according to claim 8,

on the cross section of the first bevel gear, the first meshing teeth are composed of a first meshing line, a first top side line and a second meshing line which are sequentially connected end to end, the first meshing line and the second meshing line are circular arc lines which are in a same circle and have a first radius, the first top side line is a circular arc line which has a second radius, the second radius is larger than the first radius, the first meshing tooth groove is composed of a third meshing line, a first bottom side line and a fourth meshing line which are sequentially connected end to end, the third meshing line and the fourth meshing line are circular arc lines which are in a same circle and have a third radius, and the first bottom side line is a circular arc line which has a fourth radius;

during the driving of the bevel gear based driving structure, the first meshing line and the second meshing line mesh with the seventh meshing line and the eighth meshing line, or the third meshing line and the fourth meshing line mesh with the fifth meshing line and the sixth meshing line.

10. The bevel gear based transmission according to claim 8,

on the cross section of the first bevel gear, the first meshing tooth is provided with a ninth meshing line which is convex outwards and is a circular arc line, the first meshing tooth groove is provided with a tenth meshing line which is concave inwards and is a circular arc line;

during the driving of the bevel gear based driving structure, the ninth meshing line is meshed with the twelfth meshing line, or the tenth meshing line is meshed with the eleventh meshing line.

11. A bevel gear based transmission arrangement according to claim 6 or 7, wherein the first bevel gear and/or the second bevel gear comprises a main body structure and a meshing structure, the drive member or carrier member being integrally formed with the main body structure of the first bevel gear or the main body structure of the second bevel gear.

12. The bevel gear based transmission according to claim 11,

the main body structure comprises meshing teeth and a meshing tooth groove, and the meshing structure comprises a first meshing part and a second meshing part, wherein the first meshing part is positioned on the outer side of the meshing teeth; the edge of the first meshing part and the edge of the second meshing part are both arc-shaped, a plurality of rolling pieces are arranged on the outer side of the edge of the first meshing part and/or the outer side of the edge of the second meshing part, the rolling pieces can roll along the meshing direction, and the plurality of rolling pieces form the meshing position of the first meshing part and/or the second meshing part.

13. The bevel gear based transmission according to any one of claims 1 to 7, wherein a fitting angle of the first bevel gear and the second bevel gear is greater than 0 and less than or equal to 90 °.

14. The bevel gear based transmission arrangement according to claim 13, wherein the angle of engagement of the first bevel gear and the second bevel gear is 30 °, 45 °, 60 ° or 90 °.

15. The bevel gear-based transmission structure according to any one of claims 1 to 7, wherein, on a first circular surface perpendicular to an axis of the first bevel gear and centered on the axis of the first bevel gear, a projection of the first meshing tooth extends in a radial direction of the first circular surface passing through one end of the first meshing tooth; on a second circular surface which is perpendicular to the axis of the second bevel gear and takes the axis of the second bevel gear as the center of a circle, the extending direction of the projection of the second meshing tooth is the radial direction of the second circular surface passing through one end of the second meshing tooth;

or, on a first circular surface which is perpendicular to the axis of the first bevel gear and takes the axis of the first bevel gear as a center of a circle, a first included angle is formed between at least one part of the extending direction of the projection of the first meshing tooth and the radial direction of one end of the first circular surface, which passes through the first meshing tooth, and the first included angle is larger than 0 degree and smaller than 90 degrees; on a second circular surface which is perpendicular to the axis of the second bevel gear and takes the axis of the second bevel gear as a circle center, a second included angle is formed between at least one part of the extending direction of the projection of the second meshing tooth and the radial direction of one end of the second circular surface, which passes through the second meshing tooth, and the second included angle is larger than 0 degree and smaller than 90 degrees.

16. A transmission structure based on bevel gears is characterized by comprising a first bevel gear and at least two second bevel gears, wherein each second bevel gear is used for being meshed with the first bevel gear to drive the first bevel gear; wherein the content of the first and second substances,

the second bevel gear comprises a second meshing tooth and a second meshing tooth groove which are circumferentially arranged, and on the cross section of the second bevel gear, the meshing parts of the second meshing tooth and the second meshing tooth groove are both arc-shaped meshing lines;

in the transmission process of the transmission structure based on the bevel gears, at the same time, the meshing modes of the second bevel gears and the first bevel gears are the same.