阅读说明：本技术 蜗杆自锁式单向转动机构 (Worm self-locking type unidirectional rotating mechanism ) 是由 广军 于 2021-01-08 设计创作，主要内容包括：本发明蜗杆自锁式单向转动机构,涉及机械传动技术领域,尤其涉及用于汽车和机床上的单向转动机构。本发明的框架的两侧中部固定装有框架内前圆柱齿轮、框架内后圆柱齿轮以及蜗杆支架；框架内前圆柱齿轮和框架内后圆柱齿轮套装于中心轴上；中心轴上还固定装有中心轴前支架和中心轴后支架；框架内前圆柱齿轮的上下两侧各对称啮合装有一套第一轴传动结构；框架内后圆柱齿轮的上下两侧各对称啮合装有一套第二轴传动结构；上下两套第一轴传动结构与第二轴传动结构均与蜗轮蜗杆结构相连接；蜗轮蜗杆结构的前后两端分别装于中心轴前支架和中心轴后支架中部的轴孔上。(The invention discloses a worm self-locking type unidirectional rotating mechanism, relates to the technical field of mechanical transmission, and particularly relates to a unidirectional rotating mechanism used on automobiles and machine tools. The middle parts of two sides of the frame are fixedly provided with an inner front cylindrical gear of the frame, an inner rear cylindrical gear of the frame and a worm support; the front cylindrical gear in the frame and the rear cylindrical gear in the frame are sleeved on the central shaft; the central shaft is also fixedly provided with a central shaft front bracket and a central shaft rear bracket; the upper side and the lower side of a front cylindrical gear in the frame are respectively symmetrically meshed with a set of first shaft transmission structure; a set of second shaft transmission structure is symmetrically engaged and arranged on the upper side and the lower side of the rear cylindrical gear in the frame; the upper and lower sets of first shaft transmission structures and second shaft transmission structures are connected with the worm gear structure; the front end and the rear end of the worm gear structure are respectively arranged on the shaft holes in the middle of the central shaft front support and the central shaft rear support.)

1. The self-locking unidirectional rotation mechanism for the worm is characterized by comprising the following components: the device comprises a frame (1), a front cylindrical gear (4) in the frame, a rear cylindrical gear (10) in the frame, a worm support (15), a central shaft (16), a central shaft front support (19), a central shaft rear support (20), a first shaft transmission structure, a second shaft transmission structure and a worm gear structure;

the middle parts of two sides of the frame (1) are fixedly provided with a front cylindrical gear (4) in the frame and a rear cylindrical gear (10) in the frame;

the front cylindrical gear (4) in the frame and the rear cylindrical gear (10) in the frame are sleeved on the central shaft (16);

a central shaft front bracket (19), a central shaft rear bracket (20) and a worm bracket (15) are also fixedly arranged on the central shaft (16);

n sets of first shaft transmission structures are uniformly meshed on the front cylindrical gear (4) in the frame;

n sets of second shaft transmission structures are uniformly distributed and meshed on the rear cylindrical gear (10) in the frame;

the number of the first shaft transmission structures is the same as that of the second shaft transmission structures;

the first shaft transmission structure and the second shaft transmission structure are both connected with a worm gear structure;

the front end and the rear end of the worm gear structure are respectively arranged on the shaft holes in the middle of the central shaft front bracket (19) and the central shaft rear bracket (20).

2. The worm self-locking type unidirectional rotation mechanism as claimed in claim 1, wherein the first shaft transmission structure comprises: the front cylindrical gear (2) of the first shaft, the first shaft (3) and the rear cylindrical gear (5) of the first shaft;

the first shaft (3) is arranged on a shaft hole of the central shaft front bracket (19);

the front end and the rear end of the first shaft (3) are respectively provided with a first shaft front cylindrical gear (2) and a first shaft rear cylindrical gear (5);

the first shaft front cylindrical gear (2) is meshed with a front cylindrical gear (4) in the frame;

the first shaft rear cylindrical gear (5) is meshed with the worm gear structure.

3. The worm self-locking type unidirectional rotation mechanism as claimed in claim 1, wherein the second shaft transmission structure comprises: a second shaft cylindrical gear (8), a second shaft (9) and a conical gear (11);

the second shaft (9) is arranged on the shaft hole of the central shaft rear bracket (20);

the front end and the rear end of the second shaft (9) are respectively provided with a conical gear (11) and a second shaft cylindrical gear (8);

the conical gear (11) is meshed with the worm gear structure;

the second shaft cylindrical gear (8) is meshed with a rear cylindrical gear (10) in the frame.

4. The worm self-locking type unidirectional rotation mechanism of claim 1, wherein the worm gear structure comprises: a worm gear shaft cylindrical gear (6), a worm gear shaft (7), a worm conical gear (12), a worm (13), a worm wheel (14) and a worm support (15);

the worm wheel (14) is arranged on the worm wheel shaft (7);

the worm gear shaft cylindrical gear (6) is arranged on the worm gear shaft (7) and is meshed with the first shaft rear cylindrical gear (5);

the front end of the worm wheel shaft (7) is provided with a central shaft front bracket (19), and the rear end is provided with a central shaft rear bracket (20);

the worm (13) is fixedly arranged between the central shaft front bracket (19) and the central shaft rear bracket (20) through a worm bracket (15) and is meshed with the turbine (14);

the worm conical gear (12) is arranged on the worm (13) and is meshed with the conical gear (11).

5. The worm self-locking type unidirectional rotation mechanism as claimed in claim 3, wherein an elastic structure is arranged between the second shaft (9) and the second shaft cylindrical gear (8), and comprises: a left spring (18) and a right spring (17);

spring fixing clips are symmetrically arranged on the axis of the end part of the second shaft (9);

the inner wall of the second shaft cylindrical gear (8) is provided with spring fixing clips with symmetrical axes;

the left spring (18) and the right spring (17) are symmetrically arranged between the spring fixing clips on the two sides.

Technical Field

The invention discloses a worm self-locking type unidirectional rotating mechanism, relates to the technical field of mechanical transmission, and particularly relates to a unidirectional rotating mechanism used on automobiles and machine tools.

Background

At present, a one-way bearing (also called an overrunning clutch) used on an automobile, a motorcycle or a machine tool adopts a wedge type or slope and roller structure design, has the problems of low slip angle, low automatic compensation wear capacity, low bearing and impact resistance and the like, and is easy to cause serious safety accidents due to the failure of parts and increase energy consumption.

Aiming at the problems in the prior art, a novel worm self-locking type unidirectional rotating mechanism is researched and designed, so that the problem in the prior art is very necessary to be solved.

Disclosure of Invention

The existing one-way bearing (overrunning clutch) proposed according to the prior art has the technical problems of slip angle, low automatic compensation abrasion capability, low bearing and impact resistance capability and can only be used in low-speed and light-load occasions, and the worm self-locking one-way rotating mechanism is provided. The invention mainly utilizes two sets of first and second shaft transmission structures, worm and gear structures, a frame and a central shaft structure which are symmetrically assembled, thereby realizing the effect of unidirectional rotation.

The technical means adopted by the invention are as follows:

a self-locking unidirectional rotation mechanism of a worm comprises: the device comprises a frame, a front cylindrical gear in the frame, a rear cylindrical gear in the frame, a central shaft front support, a central shaft rear support, a first shaft transmission structure, a second shaft transmission structure and a worm gear structure;

furthermore, the middle parts of the two sides of the frame are fixedly provided with a front cylindrical gear in the frame and a rear cylindrical gear in the frame;

furthermore, a front cylindrical gear in the frame and a rear cylindrical gear in the frame are sleeved on the central shaft;

furthermore, a central shaft front bracket, a central shaft rear bracket and a worm bracket are fixedly arranged on the central shaft;

furthermore, N sets of first shaft transmission structures are uniformly meshed on the front cylindrical gear in the frame;

furthermore, N sets of second shaft transmission structures are uniformly distributed and meshed on the rear cylindrical gear in the frame;

furthermore, the number of the first shaft transmission structures is the same as that of the second shaft transmission structures;

furthermore, the first shaft transmission structure and the second shaft transmission structure are both connected with a worm gear structure;

furthermore, the front end and the rear end of the worm gear structure are respectively arranged on the shaft holes in the middle of the central shaft front support and the central shaft rear support.

Further, the first shaft transmission structure includes: the front cylindrical gear of the first shaft, the first shaft and the rear cylindrical gear of the first shaft;

further, the first shaft is arranged on a shaft hole of the central shaft front bracket;

furthermore, a front cylindrical gear and a rear cylindrical gear of the first shaft are respectively arranged at the front end and the rear end of the first shaft;

furthermore, the front cylindrical gear of the first shaft is meshed with the front cylindrical gear in the frame;

further, the first shaft rear cylindrical gear is meshed with the worm gear structure.

Further, the second shaft transmission structure includes: a second shaft cylindrical gear, a second shaft and a conical gear;

further, the second shaft is arranged on a shaft hole of the central shaft rear bracket;

furthermore, a conical gear and a second shaft cylindrical gear are respectively arranged at the front end and the rear end of the second shaft;

further, the bevel gear is meshed with the worm and gear structure;

further, the second shaft cylindrical gear is meshed with a rear cylindrical gear in the frame.

Further, the worm gear structure includes: the turbine shaft cylindrical gear, the worm gear shaft, the worm conical gear, the worm wheel and the worm support;

further, the worm wheel is arranged on a worm wheel shaft;

furthermore, a cylindrical gear of the turbine shaft is arranged on the turbine shaft and meshed with the cylindrical gear behind the first shaft

Furthermore, the front end of the worm wheel shaft is provided with a central shaft front bracket, and the rear end of the worm wheel shaft is provided with a central shaft rear bracket;

furthermore, the worm is fixedly arranged between the central shaft front support and the central shaft rear support through a worm support and is meshed with the turbine;

further, a worm bevel gear is mounted on the worm and meshed with the bevel gear.

Further, be provided with elastic construction between second shaft and the second shaft cylindrical gear, include: a left spring and a right spring;

furthermore, spring fixing clips are symmetrically arranged on the axis of the end part of the second shaft;

furthermore, spring fixing clips with symmetrical axes are arranged on the inner wall of the second shaft cylindrical gear;

furthermore, the left spring and the right spring are symmetrically arranged between the spring fixing clips on the two sides.

The use mode of the invention is the following two states:

the first state:

the frame rotates towards one direction, a front cylindrical gear in the frame drives a front cylindrical gear of the first shaft to rotate, and a rear cylindrical gear in the frame drives a cylindrical gear of the second shaft to rotate; under the push of the left spring and the right spring, the rotation directions of the second shaft cylindrical gear and the second shaft are opposite; the second shaft drives a conical gear to rotate, the conical gear drives a worm conical gear to rotate, and the worm conical gear drives a worm to rotate; the first shaft front cylindrical gear drives the first shaft rear cylindrical gear to rotate through the first shaft, the first shaft rear cylindrical gear drives the worm gear shaft cylindrical gear to rotate, and the worm gear shaft cylindrical gear drives the worm gear to rotate through the worm gear shaft; because, the rotation direction of the worm wheel is opposite to that of the worm wheel in the worm drive; moreover, the worm transmission has a self-locking function; therefore, the frame drives the central shaft to rotate in the same direction.

And a second state:

the frame rotates towards the other direction, a front cylindrical gear in the frame drives a front cylindrical gear of the first shaft to rotate, and a rear cylindrical gear in the frame drives a cylindrical gear of the second shaft to rotate; the cylindrical gear of the second shaft pushes the left spring and the right spring, the left spring and the right spring push the second shaft, and the cylindrical gear of the second shaft rotates in the same direction as the second shaft; the second shaft drives the conical gear to rotate, the conical gear drives the worm conical gear to rotate, the worm conical gear drives the worm to rotate, and the worm drives the worm wheel to rotate; the first shaft front cylindrical gear drives the first shaft rear cylindrical gear to rotate through the first shaft, and the first shaft rear cylindrical gear drives the worm gear shaft cylindrical gear to rotate; because the worm wheel shaft cylindrical gear and the worm wheel are both arranged on the worm wheel shaft, and the rotating speed and the rotating direction of the worm wheel shaft cylindrical gear and the worm wheel are consistent; therefore, the frame rotates in the other direction, and the central shaft may not rotate or rotate in the opposite direction.

Compared with the prior art, the invention has the following advantages:

the worm self-locking type one-way rotating mechanism provided by the invention has the advantages that under the action of the self-locking function of the spring and the worm transmission, in mechanical transmission such as intermittent feeding, reverse rotation prevention, overrunning clutch and the like, all transmission parts are tightly attached without gaps, no slip angle exists, the abrasion of the parts can be automatically compensated, the bearing capacity and the impact resistance are strong, the operation is reliable, the service life is long, and the worm self-locking type one-way rotating mechanism is suitable for occasions with various rotating speeds and loads.

In conclusion, the technical scheme of the invention solves the problems that the existing one-way bearing (overrunning clutch) in the prior art has slip angle, low automatic compensation wear capability, low bearing and impact resistance capability and can only be used in low-speed and light-load occasions.

Drawings

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

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the elastic structure of the present invention;

FIG. 3 is a schematic view of a worm assembly;

fig. 4 is a top view of the worm assembly.

In the figure: 1. the device comprises a frame 2, a first shaft front cylindrical gear 3, a first shaft 4, a frame inner front cylindrical gear 5, a first shaft rear cylindrical gear 6, a worm gear shaft cylindrical gear 7, a worm gear shaft 8, a second shaft cylindrical gear 9, a second shaft 10, a frame inner rear cylindrical gear 11, a conical gear 12, a worm conical gear 13, a worm 14, a worm wheel 15, a worm support 16, a central shaft 17, a right spring 18, a left spring 19, a central shaft front support 20 and a central shaft rear support.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those 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 particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

Example one

As shown in fig. 1, the present invention provides a self-locking unidirectional rotation mechanism for worm, comprising: the device comprises a frame 1, a front cylindrical gear 4 in the frame, a rear cylindrical gear 10 in the frame, a central shaft 16, a central shaft front support 19, a central shaft rear support 20, a first shaft transmission structure, a second shaft transmission structure and a worm gear structure; the middle parts of two sides of the frame 1 are fixedly provided with a front cylindrical gear 4 in the frame and a rear cylindrical gear 10 in the frame; the front cylindrical gear 4 in the frame and the rear cylindrical gear 10 in the frame are sleeved on a central shaft 16; a central shaft front bracket 19, a central shaft rear bracket 20 and a worm bracket are also fixedly arranged on the central shaft 16; the upper side and the lower side of a front cylindrical gear 4 in the frame are respectively symmetrically meshed with a set of first shaft transmission structure; a set of second shaft transmission structure is symmetrically meshed with the upper side and the lower side of the rear cylindrical gear 10 in the frame; the upper and lower sets of first shaft transmission structures and second shaft transmission structures are connected with the worm gear structure; the front end and the rear end of the worm gear structure are respectively arranged on the shaft holes in the middle of the central shaft front bracket 19 and the central shaft rear bracket 20.

The first shaft transmission structure and the second shaft transmission structure are both connected with a worm gear structure;

as shown in fig. 1, the first shaft transmission structure includes: a first shaft front cylindrical gear 2, a first shaft 3 and a first shaft rear cylindrical gear 5; the first shaft 3 is arranged on the shaft hole of the central shaft front bracket 19; the front end and the rear end of the first shaft 3 are respectively provided with a first shaft front cylindrical gear 2 and a first shaft rear cylindrical gear 5; the first shaft front cylindrical gear 2 is meshed with a front cylindrical gear 4 in the frame; the first shaft rear cylindrical gear 5 is meshed with the worm gear structure.

As shown in fig. 1, the second shaft transmission structure includes: a second shaft cylindrical gear 8, a second shaft 9 and a conical gear 11; the second shaft 9 is arranged on the shaft hole of the central shaft rear bracket 20; the front end and the rear end of the second shaft 9 are respectively provided with a conical gear 11 and a second shaft cylindrical gear 8; the conical gear 11 is meshed with a worm gear structure; the second shaft cylindrical gear 8 is meshed with a rear cylindrical gear 10 in the frame.

As shown in fig. 1, the worm gear structure includes: a worm shaft 7 of the turbine shaft cylindrical gear, a worm conical gear 12, a worm 13, a worm wheel 14 and a worm support 15; the worm wheel 14 is arranged on the worm wheel shaft 7; the turbine shaft cylindrical gear 6 is arranged on the turbine shaft 7 and meshed with the first shaft rear cylindrical gear 5; the front end of the worm wheel shaft 7 is provided with a central shaft front bracket 19, and the rear end is provided with a central shaft rear bracket 20; the worm 13 is fixedly arranged between the central shaft front bracket 19 and the central shaft rear bracket 20 through a worm bracket 15 and is meshed with the worm wheel 14;

the worm bevel gear 12 is mounted on the worm 13 and meshes with the bevel gear 11.

As shown in fig. 2, an elastic structure is provided between the second shaft 9 and the second shaft cylindrical gear 8, and includes: left and right springs 18 and 17; spring fixing clips are symmetrically arranged on the axis of the end part of the second shaft 9; the inner wall of the second shaft cylindrical gear 8 is provided with spring fixing clips with symmetrical axes; the left spring 18 and the right spring 17 are symmetrically arranged between the spring fixing clips at two sides.

Example two

According to the first embodiment, the present application further provides a self-locking unidirectional rotation mechanism for a worm, comprising: the device comprises a frame 1, a front cylindrical gear 4 in the frame, a rear cylindrical gear 10 in the frame, a central shaft 16, a central shaft front support 19, a central shaft rear support 20, a first shaft transmission structure, a second shaft transmission structure and a worm gear structure; the middle parts of two sides of the frame 1 are fixedly provided with a front cylindrical gear 4 in the frame and a rear cylindrical gear 10 in the frame; the front cylindrical gear 4 in the frame and the rear cylindrical gear 10 in the frame are sleeved on a central shaft 16; a central shaft front bracket 19, a central shaft rear bracket 20 and a worm bracket are also fixedly arranged on the central shaft 16; 3 sets of first shaft transmission structures are uniformly meshed on the front cylindrical gear 4 in the frame; 3 sets of second shaft transmission structures are uniformly meshed on the rear cylindrical gear 10 in the frame; the first shaft transmission structure and the second shaft transmission structure are both connected with a worm gear structure; the front end and the rear end of the worm gear structure are respectively arranged on the shaft holes in the middle of the central shaft front bracket 19 and the central shaft rear bracket 20.

As shown in fig. 1, the first shaft transmission structure includes: a first shaft front cylindrical gear 2, a first shaft 3 and a first shaft rear cylindrical gear 5; the first shaft 3 is arranged on the shaft hole of the central shaft front bracket 19; the front end and the rear end of the first shaft 3 are respectively provided with a first shaft front cylindrical gear 2 and a first shaft rear cylindrical gear 5; the first shaft front cylindrical gear 2 is meshed with a front cylindrical gear 4 in the frame; the first shaft rear cylindrical gear 5 is meshed with the worm gear structure.

As shown in fig. 1, the second shaft transmission structure includes: a second shaft cylindrical gear 8, a second shaft 9 and a conical gear 11; the second shaft 9 is arranged on the shaft hole of the central shaft rear bracket 20; the front end and the rear end of the second shaft 9 are respectively provided with a conical gear 11 and a second shaft cylindrical gear 8; the conical gear 11 is meshed with a worm gear structure; the second shaft cylindrical gear 8 is meshed with a rear cylindrical gear 10 in the frame.

As shown in fig. 1, the worm gear structure includes: a worm shaft 7 of the turbine shaft cylindrical gear, a worm conical gear 12, a worm 13, a worm wheel 14 and a worm support 15; the worm wheel 14 is arranged on the worm wheel shaft 7; the turbine shaft cylindrical gear 6 is arranged on the turbine shaft 7 and meshed with the first shaft rear cylindrical gear 5; the front end of the worm wheel shaft 7 is provided with a central shaft front bracket 19, and the rear end is provided with a central shaft rear bracket 20; the worm 13 is fixedly arranged between the central shaft front bracket 19 and the central shaft rear bracket 20 through a worm bracket 15 and is meshed with the worm wheel 14;

the worm bevel gear 12 is mounted on the worm 13 and meshes with the bevel gear 11.

As shown in fig. 2, an elastic structure is provided between the second shaft 9 and the second shaft cylindrical gear 8, and includes: left and right springs 18 and 17; spring fixing clips are symmetrically arranged on the axis of the end part of the second shaft 9; the inner wall of the second shaft cylindrical gear 8 is provided with spring fixing clips with symmetrical axes; the left spring 18 and the right spring 17 are symmetrically arranged between the spring fixing clips at two sides.

EXAMPLE III

According to the first embodiment, the present application further provides a self-locking unidirectional rotation mechanism for a worm, comprising: the device comprises a frame 1, a front cylindrical gear 4 in the frame, a rear cylindrical gear 10 in the frame, a central shaft 16, a central shaft front support 19, a central shaft rear support 20, a first shaft transmission structure, a second shaft transmission structure and a worm gear structure; the middle parts of two sides of the frame 1 are fixedly provided with a front cylindrical gear 4 in the frame and a rear cylindrical gear 10 in the frame; the front cylindrical gear 4 in the frame and the rear cylindrical gear 10 in the frame are sleeved on a central shaft 16; a central shaft front bracket 19, a central shaft rear bracket 20 and a worm bracket are also fixedly arranged on the central shaft 16; 4 sets of first shaft transmission structures are uniformly meshed on the front cylindrical gear 4 in the frame; 4 sets of second shaft transmission structures are uniformly meshed on the rear cylindrical gear 10 in the frame; the first shaft transmission structure and the second shaft transmission structure are both connected with a worm gear structure; the front end and the rear end of the worm gear structure are respectively arranged on the shaft holes in the middle of the central shaft front bracket 19 and the central shaft rear bracket 20.

As shown in fig. 1, the first shaft transmission structure includes: a first shaft front cylindrical gear 2, a first shaft 3 and a first shaft rear cylindrical gear 5; the first shaft 3 is arranged on the shaft hole of the central shaft front bracket 19; the front end and the rear end of the first shaft 3 are respectively provided with a first shaft front cylindrical gear 2 and a first shaft rear cylindrical gear 5; the first shaft front cylindrical gear 2 is meshed with a front cylindrical gear 4 in the frame; the first shaft rear cylindrical gear 5 is meshed with the worm gear structure.

As shown in fig. 1, the second shaft transmission structure includes: a second shaft cylindrical gear 8, a second shaft 9 and a conical gear 11; the second shaft 9 is arranged on the shaft hole of the central shaft rear bracket 20; the front end and the rear end of the second shaft 9 are respectively provided with a conical gear 11 and a second shaft cylindrical gear 8; the conical gear 11 is meshed with a worm gear structure; the second shaft cylindrical gear 8 is meshed with a rear cylindrical gear 10 in the frame.

As shown in fig. 1, the worm gear structure includes: a worm shaft 7 of the turbine shaft cylindrical gear, a worm conical gear 12, a worm 13, a worm wheel 14 and a worm support 15; the worm wheel 14 is arranged on the worm wheel shaft 7; the turbine shaft cylindrical gear 6 is arranged on the turbine shaft 7 and meshed with the first shaft rear cylindrical gear 5; the front end of the worm wheel shaft 7 is provided with a central shaft front bracket 19, and the rear end is provided with a central shaft rear bracket 20; the worm 13 is fixedly arranged between the central shaft front bracket 19 and the central shaft rear bracket 20 through a worm bracket 15 and is meshed with the worm wheel 14;

the worm bevel gear 12 is mounted on the worm 13 and meshes with the bevel gear 11.

As shown in fig. 2, an elastic structure is provided between the second shaft 9 and the second shaft cylindrical gear 8, and includes: left and right springs 18 and 17; spring fixing clips are symmetrically arranged on the axis of the end part of the second shaft 9; the inner wall of the second shaft cylindrical gear 8 is provided with spring fixing clips with symmetrical axes; the left spring 18 and the right spring 17 are symmetrically arranged between the spring fixing clips at two sides.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.