CN111267892A

CN111267892A - Torsion bar and rocker arm connecting structure of anti-side rolling torsion bar device of locomotive vehicle

Info

Publication number: CN111267892A
Application number: CN202010123626.7A
Authority: CN
Inventors: 郑家旗
Original assignee: Individual
Current assignee: Rizhao Anjida Electromechanical Co ltd
Priority date: 2020-02-27
Filing date: 2020-02-27
Publication date: 2020-06-12
Anticipated expiration: 2040-02-27
Also published as: CN112389483B; CN112319534B; CN112389483A; CN111267892B; CN112319534A

Abstract

The invention discloses a connecting structure of a torsion bar and a rocker arm of a rolling stock anti-side rolling torsion bar device, which comprises a bracket, a torsion bar, a rocker arm and a butt joint device, wherein the torsion bar is sequentially provided with a limit snap ring, the butt joint device and the bracket from the middle to two ends, the butt joint device is fixed with the bracket, the butt joint device is provided with two groups of level adjusting mechanisms, the rocker arm is arranged on the butt joint device, the two groups of level adjusting mechanisms amplify the force of the up (down) swinging of the rocker arm and act on the torsion bar, the invention is scientific and reasonable and convenient to use, the butt joint device only generates two groups of opposite acting forces on the torsion bar, the force of the up (down) swinging of the rocker arm can be amplified and acts on the torsion bar through the level adjusting mechanisms, the torsion bar generates torsional deformation under the action of the opposite forces at the two ends, the torsional deformation of the torsion bar is increased through the amplified, thereby improving the anti-roll performance of the vehicle.

Description

Torsion bar and rocker arm connecting structure of anti-side rolling torsion bar device of locomotive vehicle

Technical Field

The invention relates to the technical field of a torsion bar and rocker arm connecting structure, in particular to a torsion bar and rocker arm connecting structure of a rolling resistance torsion bar device of a locomotive vehicle.

Background

Along with the development of high-speed trains and urban rail vehicles, air springs are increasingly adopted, and after the air springs with large deflection are adopted in the secondary suspension, better vertical performance of the vehicle is obtained, but a larger problem is brought, namely the reduction of the side rolling rigidity of the vehicle is caused.

In order to solve the problem, in order to inhibit the reduction of the anti-roll stiffness of the vehicle, a set of anti-roll torsion bar device is additionally arranged in a suspension system of a bogie in common use for the vehicle, and the aim of providing anti-torque counter torque by utilizing torsional deformation generated when a metal elastic rod is acted by torque is achieved. The torsion bar has the characteristics of simple process, high calculation accuracy and easiness in control, and is widely applied in the field.

At present, a torsion bar and a rocker arm adopt a spline connection structure, and under the side rolling motion state of the structure, a stressed part only has a local spline tooth surface, so that the contact of the tooth surface and the tooth surface belongs to a linear contact kinematic pair, the connection strength is lower than that of a surface contact connection structure, and the requirement on the angle of a spline is strict, so that the assembly is difficult to realize.

Therefore, a torsion bar and rocker arm connecting structure of an anti-rolling torsion bar device of a rolling stock is needed to solve the problems.

Disclosure of Invention

The invention aims to provide a torsion bar and rocker arm connecting structure of an anti-rolling torsion bar device of a rolling stock, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: a connecting structure of a torsion bar and a rocker arm of a rolling stock anti-side rolling torsion bar device comprises a support, the torsion bar, the rocker arm and a butt joint device, wherein the torsion bar is sequentially provided with a limiting snap ring, the butt joint device and the support from the middle to two ends, the butt joint device is fixed with the support, two groups of grading mechanisms are arranged on the butt joint device, the rocker arm is arranged on the butt joint device, and the two groups of grading mechanisms amplify the force of the up-and-down swinging of the rocker arm and act on the torsion bar. The bracket supports the installation of the torsion bar, the rocker arm receives external force and transmits the external force to the torsion bar, the torsion bar is subjected to the external force to generate torsional deformation, the butting device amplifies the force transmitted by the rocker arm through internal gear transmission and then acts on the torsion bar, the butting device only generates two groups of opposite acting forces on the torsion bar, the force swinging up and down of the rocker arm can be amplified and acts on the torsion bar through the level adjusting mechanism, the torsion bar generates torsional deformation under the action of the opposite forces at the two ends, the torsional deformation of the torsion bar is increased through the amplified force, and therefore large elastic counter torque is obtained to resist the side rolling of the vehicle, and the side rolling resistance of the vehicle is improved.

According to a preferable technical scheme, at least two groups of sawteeth are arranged at two ends of the torsion bar, the rocker arm is rotatably connected with the butt joint device, the level adjusting mechanism comprises at least two groups of sawtooth wheels, bearings and transmission mechanisms, the bearings are arranged at two ends of the sawtooth wheels, the four groups of sawtooth wheels and the four groups of sawteeth are matched with each other and perform gear transmission, gear grooves are formed in the outer walls of the sawtooth wheels, the sawtooth wheels perform gear transmission with the transmission mechanisms through the gear grooves, and the transmission mechanisms perform gear transmission with the rocker arm. The sawtooth improves the transmission efficiency of the acting force between the torsion bar and the butt joint device, the rocker arm is rotatably connected with the butt joint device and performs gear transmission, the level adjusting mechanism amplifies the external force through the gear transmission, the sawtooth wheel is matched with the sawtooth to perform the gear transmission, the bearings are arranged at two ends of the sawtooth wheel to improve the rotating performance of the sawtooth wheel in the butt joint device, the transmission mechanism performs the gear transmission on the acting force on the rocker arm and transmits the acting force to the sawtooth wheel, and the gear groove provides a gear transmission basis between the sawtooth wheel and the transmission mechanism.

As preferred technical scheme, the rocking arm is located the one end of interfacing apparatus and is provided with the teeth of a cogwheel, sawtooth wheel, drive mechanism have from left to right set gradually in the interfacing apparatus, drive mechanism includes drive gear, at least two sets of transmission gear belts, drive gear carries out gear drive through the teeth of a cogwheel with the rocking arm, and drive gear carries out gear drive with the transmission gear belt, transmission gear belt carries out gear drive through the gear groove with the sawtooth wheel. The gear teeth provide a basis for the rocker arm and the transmission mechanism to carry out gear transmission, the transmission gear and the transmission gear belt are mutually matched to amplify and transmit the acting force on the rocker arm, and the transmission gear belt realize the effect of amplifying the acting force through the conversion of the gear ratio.

As preferred technical scheme, the sawtooth wheel includes outer sawtooth wheel, sets up the interior sawtooth gear outside in the sawtooth wheel, outer sawtooth wheel inner wall is provided with No. I sawtooth, the outer wall of interior sawtooth gear is provided with No. II sawtooth, and the inner wall of interior sawtooth gear is provided with No. III sawtooth, No. I sawtooth and No. I sawtooth compact fit just carry out gear drive. The outer serrated wheel and the transmission mechanism are in gear transmission, the inner serrated wheel and the serrated teeth are in gear transmission, when the outer serrated wheel or the inner serrated wheel is damaged, only one of the outer serrated wheel or the inner serrated wheel needs to be replaced, the integral butt joint device does not need to be replaced, the loss of finished products is reduced, and the cost is reduced.

As a preferred technical scheme, a plurality of groups of axial struts are arranged on the inner saw gear. When the inner saw gear is under the acting force of the outer saw gear, the acting force is transmitted to the torsion bar by the inner saw gear, the torsion bar is subjected to torsional deformation, the torsion bar generates elastic counter torque, when the inner saw gear is in force transmission, the support column is also subjected to external force and subjected to axial deformation, elastic counter torque is generated, and through the mutual combination of the elastic counter torque of the torsion bar and the elastic counter torque of the support column, larger elastic counter torque is obtained to resist the side rolling of the vehicle, and the side rolling resistance of the vehicle is further improved.

As a preferred technical scheme, the transmission gear is I-shaped, the middle part of the transmission gear is a small gear, and the two ends of the transmission gear are large gears. Drive gear and two sets of transmission gear areas carry out gear drive, still need carry out gear drive with the rocking arm simultaneously, through the setting of I shape, can carry out certain injecing to the rocking arm gear drive's position, and the gear ratio between the pinion at middle part and the gear wheel at both ends is 3 simultaneously: 1, and the gear ratio of the large gear to the transmission gear belt is 1: and 3, the effect of amplifying the acting force is further achieved through the conversion of the gear ratio.

As an optimal technical scheme, the transmission gear is in gear transmission with two groups of sawtooth wheels through two groups of transmission gear belts, and the directions of sawtooth openings of the two groups of sawtooth wheels are opposite. The transmission gears on the transmission gear belts are flywheel structures, the rotation directions of the flywheel structures on the two groups of transmission gear belts are opposite, when the rocker arm moves upwards (downwards), one group of transmission gear belts drive the sawtooth wheel to rotate, the other group of transmission gear belts idle, and the effect that the original rocker arm is directly connected with the torsion bar is achieved through the arrangement of the two groups of transmission gear belts.

Compared with the prior art, the invention has the beneficial effects that:

1. the torsion bar is subjected to external force to generate torsional deformation, the force transmitted by the rocker arm is amplified by the butt joint device through internal gear transmission and then acts on the torsion bar, the butt joint device only generates two groups of opposite acting forces on the torsion bar, the force swinging up and down of the rocker arm can be amplified and acts on the torsion bar through the level adjusting mechanism, the torsion bar generates torsional deformation under the action of the forces opposite to the two ends, the torsional deformation of the torsion bar is increased through the amplified force, so that large elastic counter torque is obtained to resist the side rolling of the vehicle, and the side rolling resistance of the vehicle is improved.

2. When the inner saw gear is under the acting force of the outer saw gear, the acting force is transmitted to the torsion bar by the inner saw gear, the torsion bar is subjected to torsional deformation, the torsion bar generates elastic counter torque, when the inner saw gear is in force transmission, the support column is also subjected to external force and subjected to axial deformation, elastic counter torque is generated, and through the mutual combination of the elastic counter torque of the torsion bar and the elastic counter torque of the support column, larger elastic counter torque is obtained to resist the side rolling of the vehicle, and the side rolling resistance of the vehicle is further improved.

3. The gear ratio between the small gear in the middle and the large gears at the two ends is 3: 1, and the gear ratio of the large gear to the transmission gear belt is 1: and 3, the effect of amplifying the acting force is further achieved through the conversion of the gear ratio.

Drawings

FIG. 1 is a top view of a torsion bar and rocker arm connecting structure of an anti-rolling torsion bar device for a rolling stock according to the present invention;

FIG. 2 is a schematic diagram of a torsion bar structure of a torsion bar and rocker arm connecting structure of an anti-rolling torsion bar device for a rolling stock according to the present invention;

FIG. 3 is a left side view of a torsion bar and rocker arm connecting structure of an anti-rolling torsion bar device for a rolling stock according to the present invention;

FIG. 4 is a schematic view of a torsion bar and butt joint device connection structure of a torsion bar and rocker arm connection structure of a rolling stock torsion bar device according to the present invention;

FIG. 5 is a schematic view of a rocker arm and docking assembly connecting structure of a torsion bar and rocker arm connecting structure of a rolling stock torsion bar device according to the present invention;

FIG. 6 is a schematic view of the internal structure of a docking assembly for a connecting structure of a torsion bar and a rocker arm of an anti-rolling torsion bar device of a rolling stock according to the present invention;

FIG. 7 is a schematic view of an inner saw gear structure of a torsion bar and rocker arm connecting structure of an anti-rolling torsion bar device for a rolling stock according to the present invention;

fig. 8 is a schematic structural view of a transmission gear of a torsion bar and rocker arm connecting structure of an anti-rolling torsion bar device of a rolling stock.

The reference numbers are as follows: 1. a support; 2. a torsion bar; 3. a rocker arm; 4. a docking device; 5. a limit snap ring; 2-1, saw teeth; 4-1, a level adjusting mechanism; 4-2, a sawtooth wheel; 4-3, a bearing; 4-4, a transmission mechanism; 4-21, an outer sawtooth wheel; 4-22, an inner saw gear; 4-23, serration No. I; 4-24, No. II sawteeth; 4-25, saw tooth No. III; 4-26, struts; 4-41, transmission gear; 4-42 and a transmission gear belt.

Detailed Description

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. 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.

Example (b): as shown in fig. 1-8, a torsion bar and rocker arm connecting structure of an anti-rolling torsion bar device of a rolling stock, the connecting structure comprises a bracket 1, a torsion bar 2, a rocker arm 3 and a butt joint device 4, wherein the torsion bar 2 is sequentially provided with a limiting snap ring 5, the butt joint device 4 and the bracket 1 from the middle to two ends, a bearing is arranged in the bracket 1, the torsion bar 2 is rotatably arranged on the bracket 1 through the bearing, the butt joint device 4 is fixed with the side wall of the bracket 1 through screws, the limit snap ring 5 is arranged at the other side of the butt joint device 4, the limit snap ring 5 plays a role in limiting the position of the butt joint device 4, two groups of level adjusting mechanisms 4-1 are arranged inside the butt joint device 4, one end of the butt joint device 4 is sleeved on the torsion bar 2, the other end of the butt joint device 4 is rotatably connected with the rocker arm 3 through a fixed shaft, and the two groups of level adjusting mechanisms 4-1 amplify the force of the up-and-down swing of the rocker arm 3 and act on the torsion bar 2.

Two ends of a torsion bar 2 are both processed with two groups of sawteeth 2-1, one end of a rocker arm 3 positioned in a butt joint device 4 is provided with gear teeth, a step-adjusting mechanism 4-1 comprises two groups of sawtooth wheels 4-2 arranged in the butt joint device 4, bearings 4-3 arranged at two ends of the sawtooth wheels 4-2 and a transmission mechanism 4-4, the sawtooth wheels 4-2 and the transmission mechanism 4-4 are sequentially arranged in the butt joint device 4 from left to right, the butt joint device 4 is processed with a round hole at the position where the sawtooth wheels 4-2 are arranged, two groups of sawtooth wheels 4-2 are arranged in the round hole, two ends of each group of sawtooth wheel 4-2 are both provided with the bearings 4-3, the sawtooth wheels 4-2 are fixed in the round hole through the bearings 4-3, two ends of the bearings 4-3 are fixed in position through a limiting snap ring, and the butt joint, a gear transmission groove is processed on a circular hole of the butting device 4, four groups of sawtooth wheels 4-2 and four groups of sawteeth 2-1 are matched with each other and perform gear transmission, a gear groove is formed in the outer wall of each sawtooth wheel 4-2, the sawtooth wheels 4-2 realize gear transmission with the transmission mechanism 4-4 through the gear grooves and the gear transmission grooves, and the transmission mechanism 4-4 performs gear transmission with the rocker arm 3.

The transmission mechanism 4-4 comprises a transmission gear 4-41 and at least two groups of transmission gear belts 4-42, the transmission gear 4-41 is installed inside the butt joint device 4 through a fixed shaft, the transmission gear 4-41 and the rocker arm 3 perform gear transmission through gear teeth, the transmission gear 4-41 performs gear transmission with the transmission gear belts 4-42, and the transmission gear belts 4-42 perform gear transmission with the sawtooth wheel 4-2 through a gear groove.

The transmission gears 4-41 are I-shaped, the middle parts of the transmission gears 4-41 are small gears, the two ends of the transmission gears are large gears, the transmission gears 4-41 and the two groups of transmission gear belts 4-42 perform gear transmission, and simultaneously need to perform gear transmission with the rocker arm 3, the position of the rocker arm 3 performing gear transmission can be limited to a certain extent through the I-shaped arrangement of the transmission gears 4-41, and simultaneously, the gear ratio between the small gear in the middle part and the large gears at the two ends is 3: 1, and the gear ratio of the large gear to the transmission gear belt 4-42 is 1: 3, the gear ratio of the gear belt 4-42 and the gear groove on the sawtooth wheel 4-2 is the same,

the effect of amplifying the acting force is further achieved through the conversion of the gear ratio, the transmission gears 4-41 are in gear transmission with the two groups of sawtooth wheels 4-2 through the two groups of transmission gear belts 4-42, the directions of sawtooth openings of the two groups of sawtooth wheels 4-2 are opposite, the transmission gears on the transmission gear belts 4-42 are in flywheel structures, the rotating directions of the flywheel structures on the two groups of transmission gear belts 4-42 are opposite, when the rocker arm 3 moves upwards (downwards), one group of transmission gear belts 4-42 drive the sawtooth wheels 4-2 to rotate, the other group of transmission gear belts 4-42 idle, and the effect that the original rocker arm 3 is directly connected with the torsion bar 2 is achieved through the arrangement of the two groups of transmission gear belts 4-42.

The transmission gear belts 4-42 are arranged inside the butt joint device 4 through fixed shafts, the transmission gear belts 4-42 are provided with dredging blocks between the two groups of flywheels, the dredging blocks are welded on the inner wall of the butt joint device 4, so that the gear transmission effect of the transmission gear belts is optimal, the width of the dredging blocks is the distance between the gear belts, and the gear belts cannot slip when in gear transmission under the support of the dredging blocks.

The sawtooth wheel 4-2 comprises an outer sawtooth wheel 4-21 and an inner sawtooth wheel 4-22 arranged in the outer sawtooth wheel 4-21, a No. I sawtooth 4-23 is processed on the inner wall of the outer sawtooth wheel 4-21, a No. II sawtooth 4-24 is processed on the outer wall of the inner sawtooth 4-22, a No. III sawtooth 4-25 is processed on the inner wall of the inner sawtooth wheel 4-22, the No. I sawtooth 4-23 is tightly matched with the No. I sawtooth 4-23 and performs gear transmission, the No. III sawtooth 4-25 performs gear transmission with the sawtooth 2-1, a plurality of groups of axial supporting columns 4-26 are arranged on the inner sawtooth wheel 4-22, when the inner sawtooth wheel 4-22 performs force transmission, the supporting columns 4-26 can be subjected to external force and generate axial deformation and generate elastic counter torque, and the elastic counter torque of the torsion bar 2 is mutually combined with the elastic counter torque of the supporting columns 4-26, thereby obtaining larger elastic counter moment to resist the rolling of the vehicle and further improving the rolling resistance of the vehicle.

The working principle of the invention is as follows: the support is characterized in that a bearing is arranged inside the support 1, the torsion bar 2 is rotatably arranged on the support 1 through the bearing, the butt joint device 4 is fixed with the side wall of the support 1 through a screw, the limiting snap ring 5 is arranged on the other side of the butt joint device 4, the limiting snap ring 5 plays a role in limiting the position of the butt joint device 4, two groups of grading mechanisms 4-1 are arranged inside the butt joint device 4, one end of the butt joint device 4 is sleeved on the torsion bar 2, the other end of the butt joint device 4 is rotatably connected with the rocker arm 3 through a fixing shaft, and the two groups of grading mechanisms 4-1 amplify the up-and-down swinging force of the rocker arm 3 and.

Two groups of sawteeth 2-1 are processed at two ends of a torsion bar 2, one end of a rocker arm 3 positioned in a butt joint device 4 is provided with gear teeth, the butt joint device 4 is mutually and compactly matched and rotationally connected with the torsion bar 2 through a sawtooth wheel 4-2 and the sawteeth 2-1, the sawtooth wheel 4-2 and a transmission mechanism 4-4 are sequentially arranged in the butt joint device 4 from left to right, a round hole is processed at the position where the sawtooth wheel 4-2 is arranged on the butt joint device 4, two groups of sawtooth wheels 4-2 are arranged in the round hole, bearings 4-3 are arranged at two ends of each group of sawtooth wheel 4-2, the sawtooth wheel 4-2 is fixed in the round hole through the bearings 4-3, two ends of the bearings 4-3 are fixed in position through a limit snap ring, an oil seal is arranged at the outermost side of the round hole on the butt joint, four groups of sawtooth wheels 4-2 and four groups of sawteeth 2-1 are matched with each other and perform gear transmission, gear grooves are formed in the outer walls of the sawtooth wheels 4-2, the sawtooth wheels 4-2 perform gear transmission with the transmission mechanism 4-4 through the gear grooves and the gear transmission grooves, and the transmission mechanism 4-4 performs gear transmission with the rocker arm 3.

The transmission gears 4-41 are arranged inside the butt joint device 4 through fixed shafts, the transmission gears 4-41 and the rocker arm 3 are in gear transmission through gear teeth, the transmission gears 4-41 and the transmission gear belts 4-42 are in gear transmission, and the transmission gear belts 4-42 and the sawtooth wheel 4-2 are in gear transmission through gear grooves.

The transmission gears 4-41 are I-shaped, the middle parts of the transmission gears 4-41 are small gears, the two ends of the transmission gears are large gears, the transmission gears 4-41 and the two groups of transmission gear belts 4-42 perform gear transmission, and simultaneously need to perform gear transmission with the rocker arm 3, the position of the rocker arm 3 performing gear transmission can be limited to a certain extent through the I-shaped arrangement of the transmission gears 4-41, and simultaneously, the gear ratio between the small gear in the middle part and the large gears at the two ends is 3: 1, and the gear ratio of the large gear to the transmission gear belt is 1: and 3, the effect of amplifying the acting force is further achieved through the conversion of the gear ratio, the transmission gears 4-41 are in gear transmission with the two groups of sawtooth wheels 4-2 through the two groups of transmission gear belts 4-42, the directions of sawtooth openings of the two groups of sawtooth wheels 4-2 are opposite, the transmission gears on the transmission gear belts 4-42 are in flywheel structures, the rotating directions of the flywheel structures on the two groups of transmission gear belts 4-42 are opposite, when the rocker arm 3 moves upwards (downwards), one group of transmission gear belts 4-42 drive the sawtooth wheels 4-2 to rotate, the other group of transmission gear belts 4-42 idle, and the effect that the original rocker arm 3 is directly connected with the torsion bar 2 is achieved through the arrangement of the two groups of transmission gear belts 4-42.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a rolling stock anti-side rolling torsion bar device torsion bar and rocking arm connection structure which characterized in that: the connecting structure comprises a support (1), a torsion bar (2), rocker arms (3) and a butt joint device (4), wherein the torsion bar (2) is sequentially provided with a limiting snap ring (5), the butt joint device (4) and the support (1) from the middle to two ends, the butt joint device (4) is fixed with the support (1), at least two groups of grading mechanisms (4-1) are arranged on the butt joint device (4), the rocker arms (3) are arranged on the butt joint device (4), and the two groups of grading mechanisms (4-1) amplify the force of the rocker arms (3) swinging up and down and act on the torsion bar (2).

2. A rolling torsion bar and rocker arm joint structure for a rolling stock according to claim 1, wherein: the two ends of the torsion bar (2) are respectively provided with at least two groups of sawteeth (2-1), the rocker arm (3) is rotatably connected with the butt joint device (4), the level adjusting mechanism (4-1) comprises at least two groups of sawtooth wheels (4-2), bearings (4-3) arranged at the two ends of the sawtooth wheels (4-2) and transmission mechanisms (4-4), the four groups of sawtooth wheels (4-2) and the four groups of sawteeth (2-1) are mutually matched and perform gear transmission, the outer wall of the sawtooth wheel (4-2) is provided with a gear groove, the sawtooth wheel (4-2) performs gear transmission with the transmission mechanisms (4-4) through the gear groove, and the transmission mechanisms (4-4) perform gear transmission with the rocker arm (3).

3. A rolling torsion bar and rocker arm joint structure for a rolling stock according to claim 2, wherein: the gear tooth is arranged at one end, located in the butt joint device (4), of the rocker arm (3), the sawtooth wheel (4-2) and the transmission mechanism (4-4) are sequentially arranged in the butt joint device (4) from left to right, the transmission mechanism (4-4) comprises a transmission gear (4-41) and at least two groups of transmission gear belts (4-42), the transmission gear (4-41) and the rocker arm (3) carry out gear transmission through the gear tooth, the transmission gear (4-41) and the transmission gear belts (4-42) carry out gear transmission, and the transmission gear belts (4-42) and the sawtooth wheel (4-2) carry out gear transmission through a gear groove.

4. A rolling torsion bar and rocker arm joint structure for a rolling stock according to claim 3, wherein: sawtooth wheel (4-2) include outer sawtooth wheel (4-21), set up interior sawtooth gear (4-22) in outer sawtooth wheel (4-21), outer sawtooth wheel (4-21) inner wall is provided with No. I sawtooth (4-23), the outer wall of interior sawtooth gear (4-22) is provided with No. II sawtooth (4-24), and the inner wall of interior sawtooth gear (4-22) is provided with No. III sawtooth (4-25), No. I sawtooth (4-23) and No. I sawtooth (4-23) compact fit just carry out gear drive.

5. A rolling torsion bar and rocker arm joint structure for a rolling stock according to claim 4, wherein: the inner saw gear (4-22) is provided with a plurality of groups of axial struts (4-26).

6. A rolling torsion bar and rocker arm joint structure for a rolling stock according to claim 3, wherein: the transmission gears (4-41) are I-shaped, the middle parts of the transmission gears (4-41) are small gears, and the two ends of the transmission gears are big gears.

7. A rolling torsion bar and rocker arm joint structure for a rolling stock according to claim 3, wherein: the transmission gears (4-41) are in gear transmission with the two groups of sawtooth wheels (4-2) through two groups of transmission gear belts (4-42), and the sawtooth openings of the two groups of sawtooth wheels (4-2) are opposite in direction.