WO2021227400A1

WO2021227400A1 - Button assembly for pedal apparatus, pedal apparatus, and rail train

Info

Publication number: WO2021227400A1
Application number: PCT/CN2020/127099
Authority: WO
Inventors: 付稳超; 张莉; 张英勇; 郝明远; 冀恩祥; 陈乐恒; 潘龙玉; 安超
Original assignee: 中车唐山机车车辆有限公司
Priority date: 2020-05-13
Filing date: 2020-11-06
Publication date: 2021-11-18
Also published as: CN113665598B; CN113665598A

Abstract

A button assembly for a pedal apparatus, the pedal apparatus, and a rail train. The button assembly comprises: a rising button (211a); a lowering button (211b); a button cylinder mounting plate (221-6) having two button cylinder fixing holes; two button cylinders (221-7), a mounting flange (221-8) being provided on the front end of each button cylinder (221-7), wherein an outer ring-shaped groove (411) is provided on the back side of each mounting flange (221-8); and outer sealing rings (412), the outer sealing ring (412) being disposed in the outer ring-shaped grooves (411), and the mounting flanges (221-8) and the outer sealing rings (412) being press-fitted on the button cylinder mounting plate (221-6) for sealing, so as to achieve sealing between the button cylinders (221-7) and the button cylinder mounting plate (221-6). The rising button (211a) and the lowering button (211b) are respectively mounted from openings on the front ends of the two button cylinders (221-7). The pedal apparatus comprises the button assembly. The rail train comprises the pedal apparatus. The button assembly for a pedal apparatus, the pedal apparatus, and the rail train solve the technical problem of insufficient sealability at button positions.

Description

Button assembly for pedal device, pedal device and rail train

Technical field

The present application relates to the technical field of rail trains, in particular to a button assembly used for a rail train pedal device, a pedal device used for a rail train and a rail train.

Background technique

The foot pedal device, installed under the driver's platform of the rail train driver's cab, is an important part of the driver's platform and is the space for the driver to rest his feet. Currently, rail trains are usually fixed-height pedal devices. The button position of the pedal device is not sufficiently sealed, which causes dust and water to enter the pedal device from the button position, causing damage to the pedal device.

Therefore, the insufficient tightness of the button position of the pedal device is a technical problem that needs to be solved urgently by those skilled in the art.

The above-mentioned information disclosed in the background art is only used to strengthen the understanding of the background of the present application, and therefore it may contain information that does not form the prior art known to those of ordinary skill in the art.

Summary of the invention

The embodiments of the present application provide a button assembly for a pedal device, a pedal device and a rail train, so as to solve the technical problem of insufficient sealing of the button position of the pedal device.

The embodiment of the present application provides a button assembly for a foot pedal device of a rail train, including:

Up button and down button,

Button barrel mounting plate, with two button barrel fixing holes;

Two button barrels, the front end of the button barrel has mounting flanges; wherein the back side of the mounting flanges is provided with an outer annular groove;

An outer sealing ring, the outer sealing ring is placed in the outer annular groove, and the mounting flange and the outer sealing ring are press-fitted on the button barrel mounting plate for sealing, so as to realize the button barrel And the seal between the button barrel mounting plate;

Wherein, the up button and the down button are installed and entered from the openings at the front ends of the two button barrels respectively.

The embodiments of this application also provide the following technical solutions:

A foot pedal device for rail trains includes the button assembly described above.

A rail train includes the pedal device described above.

Due to the adoption of the above technical solutions, the embodiments of the application have the following technical effects:

The back side of the mounting flange is provided with an outer annular groove, the outer sealing ring is placed in the outer annular groove, and the mounting flange and the outer sealing ring are press-fitted on the button barrel mounting plate for sealing to achieve The seal between the button barrel and the button barrel mounting plate makes the button assembly more tightly sealed at the button position.

Description of the drawings

The drawings described here are used to provide a further understanding of the application and constitute a part of the application. The exemplary embodiments and descriptions of the application are used to explain the application, and do not constitute an improper limitation of the application. In the attached picture:

Fig. 1 is a schematic diagram of a foot pedal device for rail trains according to an embodiment of the application;

Figure 2 is a right side view of the footrest device shown in Figure 1;

Figure 3 is an exploded view of the footrest device shown in Figure 1;

4 is a perspective view showing the internal structure of the footrest device shown in FIG. 1;

FIG. 5 is a partial schematic diagram of the lower box body and the upper box body of the footrest device shown in FIG. 1 being buckled;

Figure 6 is a partial exploded view of the footrest device shown in Figure 1;

Figure 7 is a perspective view of the lower box shown in Figure 6;

Figure 8 is a perspective view of the upper box shown in Figure 7;

9 is a perspective view of the gear shaft of the foot pedal device shown in FIG. 1, the fixed disc, and the two-way ratchet locking mechanism after being assembled;

Figure 10 is a side view shown in Figure 9;

11 is a schematic diagram of the button assembly of the foot pedal device shown in FIG. 4 after being assembled;

12 is a perspective view of the button assembly of the button assembly of the foot pedal device for rail trains according to the first embodiment of the application;

Figure 13 is a side view of the button assembly shown in Figure 12;

Figure 14 is an enlarged cross-sectional view of the angle shown in Figure 13;

15 is a partial schematic diagram of the inner sealing ring of the button assembly shown in FIG. 12 after being separated from the inner annular groove;

Fig. 16 is another enlarged cross-sectional view of Fig. 13;

Fig. 17 is a schematic diagram of the leak-proof plate of the footrest device shown in Fig. 1 being fixed on the driver’s platform;

Figure 18 is a perspective view of the second transmission mechanism shown in Figure 4;

Figure 19 is a front view of the second transmission mechanism shown in Figure 18;

Figure 20 is an enlarged cross-sectional view of the angle shown in Figure 19;

Fig. 21 is an enlarged cross-sectional view of Fig. 19 from another angle.

Description of reference signs:

100 fixed base,

210 first transmission mechanism, 211a up button, 211b down button, 212 push rod,

213 roller, 214 limit plate, 215 button assembly mounting plate, 215-1 observation hole,

221 lower box, 221-1 rack, 221-2U-shaped groove, 221-3 cylinder, 221-4 lower box guide rail,

221-5 limit block, 221-6 button barrel mounting plate, 221-7 button barrel, 221-8 mounting flange,

222 upper box, 222-1 cylinder, 222-2 upper box guide groove, 223 gear shaft,

231 fixed disc, 232 ratchet locking mechanism,

240 second transmission mechanism, 241U-shaped mounting part, 242 rotating shaft,

243 force arm rod, 243-1 rod body, 243-2 roller, 244 torsion spring,

300 pedals,

411 outer ring groove, 411-1 clamping protrusion, 411-2 limit protrusion, 412 outer sealing ring,

421 inner ring groove, 422 inner sealing ring,

430 assembly ring,

510 dust-proof brush, 520 diagonal brace structure, 530 dust cover, 540 organ cover, 600 leak-proof plate.

Detailed ways

In order to make the technical solutions and advantages of the embodiments of the present application clearer, the exemplary embodiments of the present application will be described in further detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, and Not all examples are exhaustive. It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict.

Example one

Fig. 12 is a perspective view of the button assembly of the button assembly of the foot pedal device for rail trains according to the first embodiment of the application; Fig. 13 is a side view of the button assembly shown in Fig. 12; Fig. 14 is an angle section as shown in Fig. 13 Enlarged view; Fig. 15 is a partial schematic diagram of the inner sealing ring of the button assembly shown in Fig. 12 after being separated from the inner annular groove; Fig. 16 is an enlarged sectional view of another angle shown in Fig. 13.

The button assembly for a foot pedal device of a rail train according to the first embodiment of the present application is shown in FIG. 12, FIG. 13 and FIG. 14. The button assembly includes:

Up button 211a and down button 211b;

Button barrel mounting plate 221-6, with two button barrel fixing holes;

Two button barrels 221-7, the front end of the button barrel has a mounting flange 221-8; wherein the back of the mounting flange is provided with an outer annular groove 411;

The outer sealing ring 412, the outer sealing ring is placed in the outer annular groove 411, and the mounting flange 221-8 is press-fitted on the button barrel mounting plate 221-6 for sealing, so as to realize the The seal between the button barrel and the button barrel mounting plate;

In the button assembly of the foot pedal device of the rail train of the embodiment of the present application, an outer annular groove is provided on the back side where the flange is installed, the outer sealing ring is placed in the outer annular groove, the mounting flange and the outer sealing ring It is press-fitted on the button barrel mounting plate for sealing, so as to realize the seal between the button barrel and the button barrel mounting plate, so that the button assembly has a better seal at the button position.

Specifically, the button rebounds to the original position when the effect of the pressed force disappears; wherein, the button includes an up button and a down button.

In this way, the button and the button barrel cooperate with each other so that when the button is stepped on, the button moves linearly downward along the button barrel. After the button is released, the button rebounds, and the button moves linearly upward along the button barrel to rebound to the original position.

Specifically, the cross section of the outer annular groove is a U-shaped outer annular groove, and the outer seal ring is an O-shaped outer seal ring in cross section.

In implementation, as shown in FIG. 15, the inner wall of the button barrel is provided with an inner annular groove 421, and the notch of the inner annular groove 421 faces the button barrel;

The button assembly further includes an inner sealing ring 422, the inner sealing ring is placed in the inner annular groove, and the inner sealing ring is in close contact with the button, so as to realize the connection between the button and the button barrel. Seal between.

The inner annular groove is arranged on the inner wall of the button barrel, the notch of the inner annular groove faces the button barrel, and the inner sealing ring is placed in the inner annular groove. In this way, the inner sealing ring and the button are in close contact to realize the button And the seal between the button barrel.

Specifically, as shown in FIG. 15, the inner annular groove 421 is provided at the front of the button cylinder.

In this way, the inner sealing ring seals the button and the button barrel at the front of the button barrel to prevent water and dust from entering between the button and the button barrel.

In implementation, as shown in FIG. 15, the inner annular groove has a clamping protrusion 411-1, and the clamping protrusion 411-1 is arranged at the top end of the groove wall on the side away from the button barrel mounting plate;

The cross section of the inner sealing ring is consistent with the shape of the inner annular groove;

Wherein, the clamping protrusion is used to block the inner sealing ring to prevent the lower end of the inner sealing ring from entering between the button and the sealing cylinder when the button moves downward relative to the button barrel. The gap between.

The clamping protrusions exist to block the lower end of the inner seal ring. In this way, when the button moves down relative to the button, the lower end of the inner seal ring is prevented from entering the gap between the button and the seal cylinder, making the pedal device durable and service life. long.

Specifically, as shown in FIG. 15, the clamping protrusion 411-1 is a clamping protrusion with a right-angled trapezoid in cross section, and the right-angled bottom edge of the clamping protrusion 411-1 is fixed away from the button barrel. One side of the groove wall of the mounting plate, and the right-angle waist of the clamping protrusion is level with the inner wall of the sealing cylinder.

In this way, the contact surface between the clamping protrusion and the lower end of the inner sealing ring is large, and the clamping protrusion can better block the lower end of the inner sealing ring.

In implementation, as shown in FIG. 15, the inner annular groove further has a limiting protrusion 411-2 arranged diagonally to the clamping protrusion, and the cross section of the inner seal ring and the inner annular recess The shape of the groove is consistent;

Wherein, the limiting protrusion 411-2 is used to provide a downward force on the inner seal ring to prevent the upper end of the inner seal ring from entering the inner seal ring when the button moves upward relative to the button barrel. The gap between the button and the sealing cylinder.

In this way, the existence of the limiting protrusion makes the contact area between the upper end of the inner sealing ring and the inner annular groove larger, so as to prevent the upper end of the inner sealing ring from entering the gap between the button and the sealing cylinder, making the pedal device durable and useful long life.

Specifically, as shown in FIG. 15, the limiting protrusion 411-2 is a limiting protrusion with a rectangular cross section. The limiting protrusion and the clamping protrusion are arranged diagonally to provide enough space for the inner sealing ring to be clamped into the inner annular groove.

In implementation, as shown in FIG. 15, the inner wall of the button barrel is further provided with an assembly groove at a position below the inner annular groove;

The button assembly includes an assembling ring 430 installed at the assembling groove, and the inner wall of the assembling ring 430 protrudes from the inner wall of the button barrel 221-7, the assembling ring 430 The inner wall and the button are closely matched.

The existence of the transfer groove and the transfer ring converts the assembly between the button and the button barrel into the assembly between the button and the assembly ring, which reduces the strength and accuracy requirements of the button barrel.

In implementation, as shown in Figure 15, the inner sealing ring 422 has a hollow in the center, so that when the button moves along the button barrel, the inner sealing ring can deform to reduce the difference between the button and the button. Friction between.

The center of the inner sealing ring has a hollow part, which makes the inner sealing ring easy to deform. When the button moves along the button barrel, the inner sealing ring deforms to reduce the friction between the button and the button.

The inner sealing ring is a rubber ring made of nitrile rubber, and the outer sealing ring is a rubber ring made of nitrile rubber with an O-shaped cross section. The double-layer sealing protection can effectively prevent debris from entering the foot from the button position of the button assembly. Step inside the device. The service life of the inner rubber ring and the outer rubber ring are more than 10W times, and the nitrile rubber material itself has the advantage of corrosion resistance, which can effectively protect water, snow, salt, and calcium chloride.

In implementation, as shown in Figure 13 and Figure 16, the button component further includes:

Push rod 212, the bottom of the button barrel has a button barrel through hole, the bottom end of the button passes through the button barrel through hole to fix the push rod 212, the push rod is perpendicular to the button and has two The push rods are arranged oppositely; the open end of the push rod has a U-shaped mounting frame, and the two arms of the two U-shaped mounting frames are perpendicular to the button barrel mounting plate;

The roller 213 and a roller mounting shaft are fixed between the two arms of the U-shaped mounting frame, and the roller 213 is mounted on the roller mounting shaft through a bearing.

The roller is mounted on the roller mounting shaft through a bearing, so that the roller can roll around the roller mounting shaft. When the button is lowered, the push rod is driven to lower, so that the scroll wheel also descends; when the button is raised, the scroll wheel also rises.

Fig. 16 is an enlarged cross-sectional view of Fig. 13 from another angle. In practice, as shown in Fig. 16, the tread of the roller 213 has a shape with a low middle and high ends.

The roller tread of this shape is used to match the cylindrical surfaces of other components, so that the tread of the roller can straddle the cylindrical surfaces of other components.

In this way, the force transmission between the roller and other components is more stable.

In implementation, as shown in FIGS. 11 and 13, FIG. 11 is a schematic diagram of the button assembly of the foot pedal device shown in FIG. 4 after being assembled, and the button assembly further includes:

Two limit plates 214, the two limit plates 214 are respectively fixed at intervals on the back of the button cylinder mounting plate 221-6, and are located between the two rollers 213;

When the button is not pressed, the bottom end of the limiting plate 214 is lower than the bottom end of the roller 213.

When the button is not pressed, the bottom end of the limit plate is lower than the bottom end of the roller. In this way, after the button is pressed and released, the roller is protected during the rebound of the button.

Example two

Fig. 1 is a schematic diagram of a footrest device for rail trains according to an embodiment of the application; Fig. 2 is a right side view of the footrest device shown in Fig. 1; Fig. 3 is an exploded view of the footrest device shown in Fig. 1 Figure 4 is a perspective view showing the internal structure of the footrest device shown in Figure 1.

As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, the footrest device for rail train according to the embodiment of the present application includes:

The button assembly described in the first embodiment;

The button assembly mounting plate 215, the button assembly mounting plate 215 has a button assembly mounting hole, the button assembly is fixed to the button assembly mounting plate 215, and the button and the button barrel mounting plate 221-6 are removed from the button assembly mounting plate 215. The button assembly mounting hole is exposed;

The foot pedal 300 has two button mounting holes, the foot pedal 300 is fixed on the front of the button assembly mounting plate, and the up button 211a and the down button 211b are separated from the two button mounting holes Bulge.

The up button and down button used to control the up and down of the foot pedal device are directly exposed at the foot pedal, which is convenient for the driver to step on the up button and the down button. In this way, the button assembly, the button assembly mounting plate and the foot pedal cooperate to realize the installation of the button assembly and the foot pedal. The button assembly is an independent structure, so that the button assembly can be taken out separately for maintenance without the need to disassemble the pedal as a whole.

In implementation, the foot pedal device also includes:

Dust cover 530, the upper end of the dust cover has an opening;

Connect the organ cover 540 under the dust cover;

The foot pedal 300, the up button 211a and the down button 211b are exposed from the opening of the dust cover, so that the foot pedal, the up button, the down button, and the dust cover The 530 and the organ cover 540 serve as the top and side parts of the pedal device to isolate and seal from the outside.

The top and side seals of the pedal device are sealed by the dust cover, organ cover and foot pedal. The position of the down button and the up button are double-sealed by the inner and outer sealing rings. Therefore, The overall sealing of the pedal device is high.

In implementation, the pedal device further includes a flat-plate leak-proof plate, the leak-proof plate is fixed to the car body of the train, and the leak-proof plate is used as the bottom of the pedal device to isolate and seal from the outside.

In this way, the footrest device is sealed from below, so that the entire footrest device has better sealing performance.

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, the footrest device also includes:

Fixed base 100;

Lifting mechanism, the lifting mechanism is fixed on the fixed base 100, the foot pedal 300 is connected to the lifting mechanism; the button assembly is a part of the lifting mechanism;

Wherein, the lifting mechanism is used to drive the foot pedal to rise by a preset unit height when the rising button is pressed once, and to drive the foot pedal to descend when the down button is pressed once. Unit height.

The lifting mechanism is fixed on the fixed base at the bottom. When the driver steps on the lifting button once, the lifting mechanism drives the foot pedal to rise by a preset unit height, that is, when the lifting button is pressed once, the foot pedal rises by one unit height ; If you step on the up button five times, the foot pedal will rise five units of height; in the same way, if the down button is pressed once, the foot pedal will drop one unit of height. The foot pedal device is not only easy to operate the foot pedal up and down; but after a single step, the rising or falling height is a unit height, so the vertical movement height of the foot pedal is controllable, which is convenient for achieving the height of the foot pedal The adjustment to adapt to the height requirements of different drivers on the pedals.

In order to realize the lifting mechanism converts the force of pressing the button once into the force of lifting and lowering the foot pedal by a unit height. Therefore, in implementation, as shown in Figure 4, the lifting mechanism also needs to include:

The first transmission mechanism 210 is used to transmit the linear motion of the button being pressed once to the second transmission mechanism, and the buttons include the up button and the down button;

The second transmission mechanism 240 is used to carry linear motion and output a rotational motion of a preset angle of the second transmission mechanism; the first transmission mechanism includes the button assembly and the button assembly mounting plate;

The third transmission mechanism is used to carry the rotation motion of a preset angle into the rise and fall of a unit height, and drive the foot pedal to rise and fall by a unit height.

The first transmission mechanism transmits the linear motion of the button once pressed to the second transmission mechanism; the second transmission mechanism is a labor-saving mechanism, which converts the small force of pressing the button once to perform linear motion, and converts it into a preset Set the angle of the rotation movement; the third transmission mechanism converts the preset angle of rotation movement into the rise and fall of the unit height, and the third transmission mechanism drives the foot pedal to rise and fall by the unit height.

Specifically, the tread plate is a tread plate. In this way, when the driver is pedaling, the friction force is relatively high, and it is not easy to slip off.

Specifically, the foot pedal, the up button and the down button are all made of stainless steel.

The other structures of the first transmission mechanism, the second transmission mechanism and the third transmission mechanism and the foot pedal device are respectively described below.

The structure of the third transmission mechanism is as follows:

Figure 5 is a partial schematic diagram of the lower box body and the upper box body of the footrest device shown in FIG. 1 being buckled; Figure 6 is a partial exploded view of the footrest device shown in Figure 1; Figure 8 is a perspective view of the upper box shown in Figure 7; Figure 9 is a perspective view of the gear shaft of the pedal device shown in Figure 1, the fixed disc and the two-way ratchet locking mechanism assembled; Figure 10 is a side view shown in Figure 9;

In the implementation, as shown in Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9 and Fig. 10, the third transmission mechanism includes:

The lower box body 221 with the upper side opening is fixed on the fixed base 100, the inner box wall of the lower box body is provided with a rack 221-1, and the lower box body has two U-shaped grooves arranged oppositely. 221-2 and the U-shaped groove opening faces upwards;

The upper box body 222 with the lower side opening is buckled outside the lower box body 221. The upper box body is located outside the U-shaped groove and is provided with shaft mounting holes. The above box is fixed;

Gear shaft 223. Both ends of the shaft body of the gear shaft penetrate the two shaft mounting holes through the two U-shaped grooves 221-2, and the gear teeth of the gear shaft 223 and the rack 221 -1 meshing;

Wherein, the gear shaft is used to convert the rotation of the preset angle into the upward and downward rolling of the gear shaft on the rack with a unit height, so as to drive the upper box body to rise and fall according to the unit height.

The U-shaped groove opening faces upward to provide a moving space for the ascending and descending of the gear shaft. The second transmission mechanism outputs a rotation movement of a preset angle, and one end of the shaft body of the gear shaft is fixed to the second transmission mechanism, so that the shaft body of the gear shaft carries a rotation movement of a preset angle. The gear shaft converts the rotation of a preset angle into the upward and downward rolling of the gear shaft on the rack, and converts the rotation of the preset angle into the upward and downward movement of the gear shaft on the rack. The height of the lower rolling is taken as a unit height, which in turn drives the upper box body to rise and fall according to the unit height.

Specifically, the depth of the U-shaped groove opening is any value greater than or equal to 90 mm and less than or equal to 140 mm, and the rack extends at least from the height position of the inner bottom of the U-shaped groove opening to the height of the upper box body. top.

In this way, the adjustable height range of the foot pedal is relatively large, which can adapt to the height requirements of different drivers on the foot pedal.

In implementation, as shown in FIGS. 5, 6, 9 and 10, the third transmission mechanism further includes a fixed disk 231 and a two-way ratchet locking mechanism 232, and the fixed disk has a fixed disk shaft hole;

The fixed disk 231 is fixed to the outer box wall of the lower box body 221, one end of the shaft body of the gear shaft 223 passes through the fixed disk shaft hole and the ratchet wheel of the ratchet locking mechanism is coaxially fixed, so The pawl of the ratchet locking mechanism is connected to the fixed disk 231;

Wherein, the ratchet wheel of the ratchet locking mechanism is fixed to the second transmission mechanism to carry a predetermined angle of rotational movement, and the ratchet wheel of the ratchet locking mechanism is used for clockwise and counterclockwise directions with a tooth as a unit Rotation, the pawl is used to lock the ratchet wheel after the ratchet wheel rotates by one tooth, so as to achieve a preset angle of rotation.

In this way, the second transmission mechanism outputs a preset angle of rotation, and the ratchet wheel of the ratchet lock mechanism carries the preset angle of rotation; through the cooperation of the ratchet lock mechanism, the fixed disk, the gear shaft and the rack, the preset angle of rotation is rotated The movement is converted into the rise and fall of the unit height of the gear shaft, which in turn drives the rise and fall of the unit height of the upper box and the foot pedal.

Specifically, the fixed plate is fixed to the outer box wall of the lower box body by spacer blocks, bolts, and nuts. In this way, the fixing of the fixed plate is conveniently realized, and the connection of the pawl of the ratchet locking mechanism is realized.

Specifically, the coaxial fixation between one end of the shaft body of the gear shaft and the ratchet wheel of the ratchet locking mechanism is realized by the coupling. The shaft body of the gear shaft and the shaft of the ratchet wheel of the ratchet lock mechanism can be coaxially fixed conveniently through the coupling.

In implementation, as shown in Figure 5, Figure 7 and Figure 8, a cylinder 221-3 is arranged on the inner bottom plate of the lower box body, and a compression spring is fixed in the cylinder 221-3;

The inner top plate of the lower box body is provided with a cylinder 222-1;

Wherein, when the upper box body 222 and the lower box body 221 are buckled together, the cylinder 222-1 extends into the cylinder 221-3 and presses the compression spring to form the upper box body Provide upward support.

The cooperation of the cylinder, the compression spring and the cylinder provides an upward support force to the upper box body, reduces the resistance when the upper box body rises and restricts the direction of the elastic force of the compression spring.

In implementation, as shown in Figure 5, Figure 6, Figure 7 and Figure 8, the lower box 221 and the upper box 222 are rectangular parallelepiped boxes; the inner bottom plate of the lower box is provided with Two of the cylinders 221-3, and the two cylinders 221-3 are arranged at intervals along the long center line of the inner bottom plate of the upper box;

Wherein, the long center line of the inner bottom plate of the lower box body is a line connecting the midpoints of two short sides of the inner bottom plate of the lower box body.

In this way, the upper box body is matched by two sets of cylinders, compression springs and cylinders, to provide relatively uniform upward supporting force to the upper box body, reducing the resistance when the upper box body rises and restricting the direction of the elastic force of the compression spring.

Specifically, as shown in Figs. 5, 6 and 7, there are two racks 221-1, which are arranged at intervals on the inner wall of the lower case 221; correspondingly, the gear shaft 223 has two gear teeth, The gear teeth of the two gear shafts respectively mesh with the two racks 221-1.

In this way, when the gear shaft drives the upper box body to rise and fall, the effect of the force on the upper box body is more even.

In implementation, as shown in FIGS. 6 and 7, the outer box wall of the lower box body is provided with a lower box body guide rail 221-4, and the guiding direction of the lower box body guide rail 221-4 is a vertical direction;

As shown in Figure 8, the inner wall of the upper box is provided with an upper box guide groove 222-2;

Wherein, when the upper box body rises and falls relative to the lower box body, the lower box body guide rail 221-4 and the upper box body guide groove 222-2 cooperate with each other to act as a vertical guide.

The guide rail of the lower box body and the guide groove of the lower box body are coordinated and guided to make the whole upper box body stable in ascent and descent.

Specifically, as shown in FIG. 7, there are four lower box guide rails 221-4, and the four lower box guide rails 221-4 are arranged in the middle of the four outer box walls of the lower box;

As shown in FIG. 8, there are four upper box body guide grooves 222-2, and four upper box body guide grooves 222-2 are provided in the middle of the four inner box walls of the upper box body.

The four lower box guide rails and the four lower box guide grooves cooperate and guide, so that the rising and falling stability of the entire upper box is very high.

In implementation, as shown in FIG. 7, the top end of the lower box guide rail is fixed with a limiting block 221-5, and the limiting block 221-5 protrudes from the lower box guide 221-4;

Wherein, the limit block is used to prevent the upper box guide groove from coming out of the top of the lower box guide rail, and the lower box guide rail for fixing the limit block is located at the long side outer box wall of the lower box. .

The existence of the limit block prevents the upper box body guide groove from escaping from the top of the lower box body guide rail, thereby preventing the upper box body from escaping from the upper end of the lower box body. The lower box guide rail for fixing the limit block is located at the outer box wall of the long side of the lower box body, so that the position of the limit block is closer to the middle of the box body, so that the upper box body is more evenly stressed.

In implementation, as shown in FIGS. 7 and 8, the bottom plate and the wall of the lower box body 221 have lower box body weight-reducing holes, and the top plate and the box wall of the upper box body 222 have upper box body weight-reducing holes.

The existence of the weight-reducing holes of the lower box body and the weight-reducing holes of the upper box body reduces the material used for the entire pedal device and the weight is lighter.

Specifically, the bottom end of the lower box body has an outwardly turned lower box body flange, and when the upper box body is buckled outside the lower box body, the bottom end of the upper box body is placed on the The lower box body is turned up.

In this way, the upper box body and the lower box body interact to avoid contact between the upper box body and the fixed base, and reduce the strength requirements for the fixed base.

In implementation, in order to realize the overall protection of the footrest device, as shown in FIG. 1, the footrest device further includes a dust cover 530 and an organ cover 540 connected under the dust cover. The important parts of the pedal device are installed inside the dust cover and the organ cover. The dust cover is made of aluminum alloy. The organ cover is made of synthetic leather. The button requires the driver to step on. Operational, therefore, the button is exposed. Therefore, it is necessary to protect the button part.

The structure of the first transmission mechanism is as follows:

The first transmission mechanism includes the button assembly described in the first embodiment and the mounting assembly mounting plate.

In implementation, as shown in FIG. 1, the footrest device further includes dust-proof brushes 510 fixed on both sides of the footrest, which can effectively prevent particles above 1 mm from entering. Specifically, the dust-proof brush adopts a nylon-material dust-proof brush. The dustproof effect is good, and the weight is relatively light.

Fig. 17 is a schematic diagram of the leak-proof plate of the footrest device shown in Fig. 1 being fixed on the driver's platform. In implementation, as shown in FIG. 17, the pedal device further includes a flat-plate leak-proof plate 600, which is fixed to the car body of the train, and the fixed base of the pedal device is fixed on the anti-leak plate. Above the slip plate 600.

The anti-leak plate separates other parts of the pedal device from the outside, and can prevent rain, snow, dust and other sundries at the vehicle body under the anti-leak plate from entering the inside of the pedal device.

Specifically, the leak-proof plate is equipped with M6 pressure riveting studs, and the leak-proof plate is connected to the middle and right cabinets of the driver's platform by riveting. As part of the frame, it is connected by M8 nuts, large flat washers, spring washers and the car body. , The joint is glued and sealed.

In this way, the anti-leakage plate is firmly fixed.

In implementation, as shown in FIG. 3, the first transmission mechanism further includes:

The button assembly mounting plate 215 has a button assembly mounting hole, the button assembly is fixed to the button barrel mounting plate 215, and the button and the button barrel mounting plate 215 are removed from the button assembly Exposure at the mounting hole;

The foot pedal is fixed on the front of the button assembly mounting plate, and the button protrudes from the button mounting hole.

In this way, the assembly between the button assembly and the button assembly mounting plate inside the first transmission mechanism is realized, and the assembly between the button assembly mounting plate and the foot pedal is also realized.

The button assembly of the pedal device in the embodiment of the present application is an independent structure, so that the button assembly can be taken out separately for maintenance without the need to disassemble the pedal as a whole.

In implementation, as shown in FIG. 6, the footrest device further includes a plurality of diagonal bracing structures 520, and each of the diagonal bracing structures 520 is respectively fixed at the outer top plate and the outer box wall of the upper box body 222;

The back of the button assembly mounting plate 215 is fixed to the diagonal bracing structure 520 so that the button assembly mounting plate maintains a preset tilt angle with respect to the fixed base.

In this way, the button mounting component mounting plate is maintained at a preset tilt angle relative to the fixed base. Because the foot pedal is fixed on the mounting component mounting plate, the foot pedal is maintained at a preset tilt relative to the fixed base. angle.

In implementation, as shown in FIG. 3, the button assembly mounting plate 215 is provided with an observation hole 215-1 for observing the feet when the button assembly mounting plate 215 is fixed to the diagonal brace structure. Step inside the device.

The button assembly mounting plate is provided with an observation hole, so that only by removing the foot pedal, you can observe the internal state of the foot pedal device through the observation hole on the button assembly mounting plate and perform simple maintenance work. The footrest device of the embodiment of the present application has high maintainability.

The structure of the second transmission mechanism is as follows:

Fig. 18 is a perspective view of the second transmission mechanism shown in Fig. 4; Fig. 19 is a front view of the second transmission mechanism shown in Fig. 18; Fig. 20 is an enlarged cross-sectional view of Fig. 19; Fig. 21 is a view An enlarged view of another angle cross-sectional view shown in 19.

In implementation, as shown in Figures 18 and 19, the second transmission mechanism includes:

U-shaped mounting piece 241;

Two rotation shafts 242 and two force arm rods 243, one end of the force arm rod 243 is fixedly connected to the rotation shaft hole, and the rotation shaft 242 is connected to one of the two arms of the U-shaped mounting member 241 And the two rotation shafts 242 are arranged at intervals, and the two moment arm rods 243 are kept in the same straight line opposite to each other;

Wherein, the outer groove bottom of the U-shaped mounting member is fixed with the ratchet wheel of the two-way ratchet locking mechanism; when the button is pressed once, the roller presses the lower lever to make the ratchet locking mechanism The ratchet wheel is rotated by a tooth as a unit and then locked by the pawl.

The groove bottom of the U-shaped mounting member is fixed with the ratchet wheel of the two-way ratchet locking mechanism, and when the roller presses the pressure arm to rotate the second transmission mechanism, the ratchet wheel of the two-way ratchet locking mechanism also rotates; The pawl of the type ratchet locking mechanism is connected to the fixed plate, and the fixed plate is fixed to the upper box. The two-way ratchet locking mechanism makes the ratchet wheel rotate in a clockwise and counterclockwise direction in units of one tooth. The pawl locks the ratchet wheel, and the angle through which the ratchet wheel rotates by one tooth is a preset angle between two adjacent teeth of the ratchet wheel. The second transmission mechanism converts a vertical movement of the button received from the roller of the first transmission mechanism into a preset angle rotation of the second transmission mechanism as a whole. Since the ratchet wheel of the ratchet locking mechanism and the gear shaft are coaxially fixed, the gear teeth of the gear shaft will be driven to roll up and down along the rack.

In implementation, as shown in FIG. 21, both ends of the rotating shaft 242 are rotatably connected to the two arms of the U-shaped mounting member 241 through bearings;

The second transmission mechanism further includes two torsion springs 244, and the torsion springs 244 are sleeved on the outside of the rotation shaft;

Wherein, the lower torsion bar of the torsion spring is fixed to the bottom of the groove of the U-shaped mounting member, and the upper torsion bar of the torsion spring is closely attached to the torsion bar of the torsion spring toward the bottom of the groove of the U-shaped mounting member. On one side, to keep the two force arm rods in the same straight line opposite to each other.

The existence of the torsion spring, on the one hand, keeps the two force arm rods in the same straight line opposite to each other, on the other hand, when the roller presses the pressure arm rod, the torsion spring and the bearing carry a part of the force of the torsion and consume a part of the torsion belt. The coming torque increases the durability of the second transmission mechanism.

In implementation, as shown in FIG. 21, the torsion spring 244 is located under the force arm rod 243.

In this way, when the roller presses the pressure arm, the downward force of the force arm is applied on the torsion spring, not on the U-shaped mounting member. After multiple uses, if the torsion spring needs to be replaced, the replaced components are smaller and the cost is lower, which makes maintenance convenient.

In implementation, as shown in FIG. 20, the moment arm rod includes:

A rod body 243-1, one end of the rod body is provided with a rod body shaft hole, and the rod body shaft hole and the rotating shaft realize a coordinated and fixed connection with the shaft hole;

The roller 243-2, the roller 243-2 is sleeved on the outer peripheral surface of the rod body through a bearing, so that the roller 243-2 can rotate relative to the rod body, wherein the central axis of the roller and the roller The central axes of are perpendicular to each other;

When the button is pressed once, the roller presses the lower roller so that the ratchet wheel of the ratchet locking mechanism rotates in a unit of one tooth and then is locked by the pawl.

The directions of the central axis of the roller, the central axis of the drum, and the central axis of the rotation axis are three mutually perpendicular directions, all of which can be rotated, so that the torque that may be generated by the operation of pressing the button once can be carried out. Consumption, which in turn makes the pedal device more durable.

In implementation, as shown in FIG. 16, the tread of the roller 213 has a shape with a low middle and high ends, so that the tread of the roller 213 can straddle the outer circumferential surface of the drum 243-2.

In this way, the force transmission between the roller and the drum is more stable.

The components of the pedal device will be further described below.

The pedal device of the embodiment of the present application adopts a mechanical lifting method, which has the advantages of firm structure, stable function, and stable lifting process. Among them, the bearings used in the pedal device are all self-sealing structures, and the water on both sides cannot fall. To the pinion shaft and rack, so the foot pedal device has low maintenance requirements.

However, in order to prevent accidents during use of the pedal device, and to facilitate daily maintenance and repair of the pedal, after the pedal is removed, the pedal can be easily observed through the observation hole of the button assembly mounting plate. The internal state of the device can also be easily checked and repaired.

At the same time, the button assembly is an independent structure, so that the button assembly can be taken out separately for maintenance without the need to disassemble the pedal as a whole.

In implementation, due to the existence of the limit plate of the first transmission mechanism, after the button is pressed and released, the roller and the roller are reset together, and the limit plate blocks the roller to prevent the upward inertia of the roller from being applied to the roller. , It protects the rollers.

Specifically, the rack provides a stable step length for the ascent and descent of the upper box.

Specifically, the gear shaft selects standard straight teeth with 2 molds and 17 teeth. Through a large number of calculations and verifications, parameters such as the number of teeth and modulus of the gear are determined, which ensures the stability and practicability of the overall structure. Practice has proved that the dual-mode gear can better achieve the up and down of the pedal. The reason is: the smaller the modulus, the smaller the gear meshing surface, which is prone to tooth breakage. When the modulus is large, it is easy to derail when the number of teeth is too small, resulting in the phenomenon that the wheel cannot rise when idling. Practice has proved that the 2-mold 17-tooth spur cylindrical gear shaft can ensure a reasonable unit height, stable rise and fall, and a small structure.

Specifically, the included angle between the foot pedal and the horizontal plane is any value greater than or equal to 15 degrees and less than or equal to 20 degrees.

Furthermore, the included angle between the foot pedal and the horizontal plane is 20 degrees. Such an included angle conforms to the pedaling habits of many drivers and conforms to ergonomics.

Specifically, the up button and the down button are arranged at intervals on the right side of the foot pedal, and are arranged at intervals between up and down, the up button is located at the bottom, and the down button is located at the top.

When the pedal button is not stepped on, the button is about 35mm higher than the front of the pedal; the distance between the pedal button and the center of the pedal is 206mm; considering the driver’s safety boots, a man-machine analysis was carried out. Man-machine analysis shows that when the driver adjusts the height of the pedals, in order to avoid stepping on two buttons at the same time, they can be stepped at a certain angle when stepping, the inclination angle is about 12 degrees; of course, stepping on two buttons at the same time will not do the same. The foot pedal device affects, step on the two buttons at the same time, the foot pedal will move up and down according to the different force of the two buttons. At this time, the button with large force plays the main role.

Specifically, the gear shaft, rack, and lower box guide rail are made of No. 45 steel, and the spring is spring steel; that is, the components that require higher rigidity and strength in the pedal device are made of stainless steel. Other parts that need to be made of metal materials are made of aluminum alloy materials, so that the weight of the entire pedal device is small, and the purpose of weight reduction is achieved.

The contact strength, fatigue strength and fatigue bending strength of the gear shaft and rack must meet the requirements of use. The service life of the button needs to reach a service life of 30,000.

Specifically, the pedal base is fixed to the lower box body by fasteners such as bolts, nuts, and elastic flat washers.

Example three

The rail train of the embodiment of the present application has the pedal device described in the first embodiment.

In the description of this application and its embodiments, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", "height", etc. is based on the orientation or positional relationship shown in the drawings, and is only for It is convenient to describe the application and simplify the description, instead of indicating or implying that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the application.

In this application and its embodiments, unless otherwise clearly specified and limited, the terms "set", "install", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, they can be fixed. The connection can also be detachable or integrated; it can be mechanical, electrical, or communication; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. Or the interaction between two elements. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in this application can be understood according to specific circumstances.

In the present application and its embodiments, unless expressly stipulated and defined otherwise, the "on" or "under" of the first feature of the second feature may include direct contact between the first feature and the second feature, or include the first feature. The second feature is not in direct contact but through another feature between them. Moreover, the "above", "above" and "above" of the first feature on the second feature include the first feature directly above and obliquely above the second feature, or it simply means that the first feature is higher in level than the second feature. The “below”, “below” and “below” of the first feature of the second feature include the first feature directly above and diagonally above the second feature, or it simply means that the level of the first feature is smaller than the second feature.

The above disclosure provides many different embodiments or examples for realizing different structures of the present application. In order to simplify the disclosure of the present application, the components and settings of specific examples are described above. Of course, they are only examples, and are not intended to limit the application. In addition, the present application may repeat reference numbers and/or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and/or settings discussed. In addition, this application provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and/or the use of other materials.

Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they learn the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalent technologies, then this application is also intended to include these modifications and variations.

Claims

A button assembly for a foot pedal device of a rail train, which is characterized in that it comprises:

Up button and down button,

Button barrel mounting plate, with two button barrel fixing holes;

Two button barrels, the front end of the button barrel has mounting flanges; wherein the back side of the mounting flanges is provided with an outer annular groove;

An outer sealing ring, the outer sealing ring is placed in the outer annular groove, and the mounting flange and the outer sealing ring are press-fitted on the button barrel mounting plate for sealing, so as to realize the button barrel And the seal between the button barrel mounting plate;

Wherein, the up button and the down button are installed and entered from the openings at the front ends of the two button barrels respectively.
The button assembly according to claim 1, wherein the cross section of the outer annular groove is a U-shaped outer annular groove.
The button assembly according to claim 2, wherein the inner wall of the button barrel is provided with an inner annular groove, and the notch of the inner annular groove faces the inside of the button barrel;

The button assembly further includes an inner sealing ring, the inner sealing ring is placed in the inner annular groove, and the inner sealing ring is in close contact with the button to realize the button and the inner wall of the button barrel The seal between.
The button assembly according to claim 3, wherein the inner annular groove has a clamping protrusion, and the clamping protrusion is arranged at the top end of the groove wall on the side far away from the button barrel mounting plate;

The cross section of the inner sealing ring is consistent with the shape of the inner annular groove;

Wherein, the clamping protrusion is used to block the inner sealing ring to prevent the lower end of the inner sealing ring from entering between the button and the sealing cylinder when the button moves downward relative to the button barrel. The gap between.
The button assembly according to claim 4, wherein the inner annular groove further has a limiting protrusion arranged diagonally to the clamping protrusion, and the cross section of the inner sealing ring is the same as that of the inner ring. The shape of the annular groove is consistent;

Wherein, the limiting protrusion is used to provide a downward force on the inner sealing ring to prevent the upper end of the inner sealing ring from entering the button and the button when the button moves upward relative to the button barrel. Seal the gap between the cylinders.
The button assembly according to claim 5, wherein the inner wall of the button barrel is further provided with an assembly groove at a position below the inner annular groove;

The button assembly includes an assembling ring, the assembling ring is installed at the assembling groove, and the inner wall of the assembling ring protrudes from the inner wall of the button barrel, and the inner wall of the assembling ring closely fits with the button .
The button assembly according to claim 6, wherein the center of the inner sealing ring has a hollow part, so that when the button moves along the button barrel, the inner sealing ring can deform to reduce The friction between the buttons.
8. The button assembly of claim 7, wherein the button assembly further comprises:

Push rod, the bottom of the button barrel has a button barrel through hole, the bottom end of the button passes through the button barrel through hole to fix the push rod, the push rod is perpendicular to the button and has two The push rods are arranged oppositely; the open end of the push rod has a U-shaped mounting frame, and the two arms of the two U-shaped mounting frames are perpendicular to the button barrel mounting plate;

A roller and a roller mounting shaft, the roller mounting shaft is fixed between the two arms of the U-shaped mounting frame, and the roller is mounted on the roller mounting shaft through a bearing.
The button assembly of claim 8, further comprising:

Two limit plates, the two limit plates are respectively fixed at intervals on the back of the button barrel mounting plate and are located between the two rollers;

When the button is not pressed, the bottom end of the limit plate is lower than the bottom end of the roller;

Wherein, the roller is used to transmit the linear movement of the button.
A foot pedal device for rail trains, which is characterized in that it comprises:

The button assembly according to any one of claims 1 to 9;

A button assembly mounting plate, the button assembly mounting plate has a button assembly mounting hole, the button assembly is fixed to the button assembly mounting plate, and the button and the button barrel mounting plate are exposed from the button assembly mounting hole ；

The foot pedal has two button mounting holes, the foot pedal is fixed on the front of the button assembly mounting plate, and the up button and the down button respectively protrude from the two button mounting holes.
The footrest device according to claim 10, further comprising:

A dust cover, the upper end of the dust cover has an opening;

Connect the organ cover under the dust cover;

The foot pedal, the up button and the down button are exposed from the opening of the dust cover, so that the foot pedal, the up button, the down button, the dust cover and the dust cover The organ cover serves as the top and side parts of the pedal device to isolate and seal from the outside.
The footrest device according to claim 11, further comprising:

A flat-type leak-proof plate, the leak-proof plate is fixed to the car body of the train, and the leak-proof plate is used as the bottom of the pedal device to isolate and seal from the outside.
The footrest device according to claim 12, further comprising:

Fixed base

A lifting mechanism, the lifting mechanism is fixed on the fixed base, the foot pedal is connected with the lifting mechanism; the button assembly is a part of the lifting mechanism;

Wherein, the lifting mechanism is used to drive the foot pedal to rise by a preset unit height when the rising button is pressed once, and to drive the foot pedal to descend when the down button is pressed once. Unit height.
The footrest device according to claim 13, wherein the lifting mechanism further comprises a first transmission mechanism, a second transmission mechanism and a third transmission mechanism, wherein:

The first transmission mechanism is used to transmit the linear motion of the button once pressed to the second transmission mechanism, the button includes the up button and the down button; the first transmission mechanism includes the button Component and the button component mounting plate;

The second transmission mechanism is used to carry linear motion and output a rotation motion of a preset angle of the second transmission mechanism;

The third transmission mechanism is used to carry the rotation motion of a preset angle into the rise and fall of a unit height, and drive the foot pedal to rise and fall by a unit height.
The footrest device according to claim 14, wherein the third transmission mechanism comprises:

The lower box body with the upper side opening is fixed on the fixed base, the inner box wall of the lower box body is provided with a rack, the lower box body has two U-shaped grooves arranged oppositely and the U-shaped groove opening Face up

The upper box body with the lower side opening is buckled outside the lower box body, the upper box body is located outside the U-shaped groove and is provided with shaft mounting holes respectively, and the foot pedal is opposite to the upper box body. The box is fixed;

Gear shaft, both ends of the shaft body of the gear shaft penetrate into the two shaft mounting holes through the two U-shaped grooves, and the gear teeth of the gear shaft mesh with the rack;

Wherein, the gear shaft is used to convert the rotation of the preset angle into the upward and downward rolling of the gear shaft on the rack with a unit height, so as to drive the upper box body to rise and fall according to the unit height.
The pedal device according to claim 15, wherein the third transmission mechanism further comprises a fixed disc and a two-way ratchet locking mechanism, and the fixed disc has a fixed disc shaft hole;

The fixed disk is fixed to the outer box wall of the lower box body, one end of the shaft body of the gear shaft passes through the fixed disk shaft hole and the ratchet wheel of the ratchet locking mechanism is coaxially fixed, and the ratchet lock The pawl of the stop mechanism is connected with the fixed plate;

Wherein, the ratchet wheel of the ratchet locking mechanism is fixed to the second transmission mechanism to carry a predetermined angle of rotational movement, and the ratchet wheel of the ratchet locking mechanism is used for clockwise and counterclockwise directions with a tooth as a unit Rotation, the pawl is used to lock the ratchet wheel after the ratchet wheel rotates by one tooth, so as to achieve a preset angle of rotation.
The footrest device according to claim 16, wherein a cylinder is provided on the inner bottom plate of the lower box, and a compression spring is fixed in the cylinder;

The inner top plate of the lower box body is provided with a cylinder;

Wherein, when the upper box body is buckled with the lower box body, the cylinder extends into the cylinder and presses the compression spring to provide an upward supporting force for the upper box body.
The footrest device according to claim 17, wherein the outer box wall of the lower box body is provided with a lower box body guide rail, and the guiding direction of the lower box body guide rail is a vertical direction;

The inner box wall of the upper box body is provided with an upper box body guide groove;

Wherein, when the upper box body rises and falls relative to the lower box body, the lower box body guide rail and the upper box body guide groove cooperate with each other to play a vertical guiding role.
The footrest device according to claim 18, wherein a limit block is fixed at the top end of the lower box guide rail, and the limit block protrudes from the lower box guide rail;

Wherein, the limit block is used to prevent the upper box guide groove from coming out of the top of the lower box guide rail, and the lower box guide rail for fixing the limit block is located at the long side outer box wall of the lower box. .
The footrest device according to claim 19, wherein the bottom plate and the box wall of the lower box body have lower box body weight-reducing holes, and the top plate and the box wall of the upper box body have upper box body weight-reducing holes .
The footrest device according to claim 20, further comprising a plurality of diagonal bracing structures, each of the diagonal bracing structures is fixed at the outer top plate and the outer box wall of the upper box respectively;

The back of the button assembly mounting plate is fixed to the diagonal brace structure, so that the button assembly mounting plate maintains a preset inclination angle with respect to the fixed base.
The footrest device according to claim 21, wherein the button assembly mounting plate is provided with an observation hole for observing the The inside of the foot pedal.
The footrest device according to claim 22, wherein the second transmission mechanism comprises:

U-shaped mounting parts;

Two rotation shafts and two force arm rods, one end of the force arm rod is fixedly connected to the rotation shaft shaft hole, the rotation shaft is connected between the two arms of the U-shaped mounting member, and the two The rotation shafts are arranged at intervals, and the two moment arm rods are kept in the same straight line opposite to each other;

Wherein, the outer groove bottom of the U-shaped mounting member is fixed to the ratchet wheel of the two-way ratchet locking mechanism; the two rollers are located above the lever arm; when the button is pressed once, The roller presses the lower force arm lever so that the ratchet wheel of the ratchet locking mechanism rotates in units of one tooth and is locked by the pawl.
The footrest device according to claim 23, wherein the two ends of the rotating shaft are respectively rotatably connected with the two arms of the U-shaped mounting member through bearings;

The second transmission mechanism further includes two torsion springs, and the torsion springs are sleeved on the outside of the rotation shaft;

Wherein, the lower torsion bar of the torsion spring is fixed to the bottom of the groove of the U-shaped mounting member, and the upper torsion bar of the torsion spring is closely attached to the torsion bar of the torsion spring toward the bottom of the groove of the U-shaped mounting member. On one side, to keep the two force arm rods in the same straight line opposite to each other.
The footrest device according to claim 24, wherein the torsion spring is located under the force arm rod.
The footrest device according to claim 25, wherein the force arm lever comprises:

A rod body, one end of the rod body is provided with a rod body shaft hole, and the rod body shaft hole and the rotating shaft realize the shaft hole matching and fixed connection;

A roller, the roller is sleeved on the outer peripheral surface of the rod body through a bearing, so that the roller can rotate relative to the rod body, wherein the central axis of the roller and the central axis of the roller are perpendicular to each other;

When the button is pressed once, the roller presses the lower roller so that the ratchet wheel of the ratchet locking mechanism rotates in a unit of one tooth and then is locked by the pawl.
The pedal device according to claim 26, wherein the tread of the roller has a shape with a low middle and high ends, so that the tread of the roller can straddle the outer circumferential surface of the roller.
A rail train characterized by comprising the pedal device according to any one of claims 10 to 27.