Explosion-proof differential steering wheel system with caliper brake

Abstract

The utility model discloses an explosion-proof differential steering wheel system with a caliper brake, which can solve the problem that steering wheels are unstable due to different rotating speeds between two wheels during turning, can stably run in an explosion-proof environment, and realizes short-time and short-distance emergency braking. Torque is input through the driving motor, passes through the gearbox, the differential mechanism and the driving speed reducer and then is output to the tires, forward and backward power is provided for the differential steering wheel system, an inner wheel and an outer wheel can rotate at different speeds when a steering wheel turns at a high speed under the action of the differential mechanism assembly, the driving efficiency is improved, and the running stability of a vehicle is effectively guaranteed. Brake torque provided by the caliper brake assembly acts on tires through the gear box, the differential mechanism and the driving speed reducer, so that the steering wheel can complete braking in a short time and a short distance. All components of the differential steering wheel are subjected to explosion-proof sealing, and explosion-proof electric appliance elements are adopted, so that fire disasters or explosions in the external environment caused by the differential steering wheel can be effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to differential rudder wheel system technical field, concretely relates to a kind of differential rudder wheel system with caliper brake of preventing explosion. BACKGROUND

[0002] In recent years along with the continuous improvement of intelligent manufacturing level of our country, AGV (Automatic Guided Vehicle) is increasingly valued in market, especially in aerospace, military industry, new energy, heavy machinery factory, railway transportation, special industry, port airport, large-scale electric pressure vessel factory and so on more and more widely used.

[0003] In these application occasions, there are places of flammable and explosive gas, steam, dust or mixture and other dangerous factors, and AGV needs to be able to drive in these explosion dangerous areas without increasing dangerous risk; in some emergency situations, AGV needs to be able to realize emergency braking in a short time and a short distance. At this time, AGV and its driving part rudder wheel system need to have the ability of explosion prevention and emergency braking.

[0004] Common rudder wheel system, when emergency occurs, needs to stop suddenly, generally adopts the scheme that driving motor gradually reduces speed, driving motor parking brake simultaneously holds motor shaft, the braking torque of this scheme is small, the braking distance is long, and the damage to motor parking brake is large, which can seriously reduce the service life of parking brake. Common rudder wheel system generally does not have explosion-proof capability.

[0005] Therefore, in such application occasions, it is necessary to provide a differential rudder wheel system with caliper brake and explosion-proof. CONTENT OF UTILITY MODEL

[0006] In order to solve the above technical problems, the embodiment of the utility model provides a differential rudder wheel system with caliper brake and explosion-proof, which can solve the problem of unstable rudder wheel between two wheels due to different rotating speeds when turning, and can stably run in explosion-proof environment and realize short-time and short-distance emergency braking.

[0007] In order to achieve the above purpose, the embodiment of the utility model adopts the following technical scheme:

[0008] A differential rudder wheel system with caliper brake and explosion-proof, the rudder wheel system includes a caliper brake assembly, the caliper brake assembly is used for differential rudder wheel emergency braking, the caliper brake assembly is installed on the rudder wheel base assembly and keeps sealed isolation with rudder wheel base assembly;

[0009] The brake disc in the caliper brake assembly is connected with the gear box of rudder wheel base assembly through brake input shaft;

[0010] The pressure is transmitted through hydraulic pipeline or cable signal transmission mode, and acts on the caliper, the caliper friction plate is closed, and pressure is applied to the middle brake disc to generate braking torque on the brake disc.

[0011] Further, the caliper brake assembly includes a brake input shaft, a caliper, a brake disc, a brake explosion-proof shell, an explosion-proof gland, a caliper support, and a sealing element; the caliper support is installed on the rudder base assembly, and the caliper is installed on the caliper support;

[0012] The brake input shaft is installed on the brake input gear through a bearing and a screw; the brake disc is installed on the brake input shaft through a screw;

[0013] The explosion-proof gland is installed on the brake explosion-proof shell, and the brake explosion-proof shell is installed with a sealing ring and installed on the rudder base assembly.

[0014] Further, the caliper brake assembly and the rudder base assembly are kept sealed and isolated by a sealing plug and a rotating skeleton sealing ring.

[0015] Further, the rudder system further includes a rudder base assembly, a differential assembly, a driving wheel assembly, and a steering swing assembly;

[0016] The rudder base assembly is used for bearing and power transmission of the differential rudder, the differential assembly is used for power distribution of the differential rudder, and the differential assembly is installed on the rudder base assembly through a bearing and a fixed sleeve;

[0017] The driving wheel assembly is used for walking of the differential rudder, and the steering swing assembly is used for steering and small-angle swinging of the differential rudder.

[0018] Further, the rudder base assembly includes a driving motor, a base, a motor input gear, a transmission gear, an output gear, a brake input gear, a bearing end cover, a gear box end cover, a base end cover, and a sealing element;

[0019] The base is a bearing structure of the rudder, the base is provided with the driving motor, the transmission gear is arranged outside the motor input gear, the transmission gear transmits the output of the motor to the output gear located in the middle of the base, and the other side of the transmission gear is the brake input gear;

[0020] Each gear is provided with a bearing end cover, and the bearing end cover is provided with a sealing element, and the bearing end cover is fixed to the gear box end cover through a screw.

[0021] Further, the differential assembly includes a differential, a cup gear, and a differential input gear, the cup gear is connected to the differential through a screw, and the differential input gear is fixed to the output gear through a bearing, a screw, and a screw end cover.

[0022] Further, the driving wheel assembly comprises a tire, a driving speed reducer, a transmission shaft, a fixing sleeve, and a sealing element; the driving speed reducer is located at the tire axis center side, the transmission shaft is connected between the driving speed reducer and the differential; the fixing sleeve is installed on the base assembly, and the transmission shaft is embedded in the fixing sleeve; the differential assembly is installed on the fixing sleeve through a bearing; and the transmission shaft is connected to the differential assembly through a key.

[0023] Further, the steering swing assembly comprises a steering motor, a steering speed reducer, a steering pinion, a slewing bearing, a mounting plate, a swing plate, a sliding bearing end cover, a mechanical limiting block, and an explosion-proof proximity switch; the swing plate is divided into left and right parts and is installed on the base through sliding bearings and the sliding bearing end cover.

[0024] The slewing bearing and the mounting plate are installed on the swing plate; the steering motor is installed on the steering speed reducer; the steering speed reducer is installed on the mounting plate; the steering pinion is installed on the steering speed reducer; the mechanical limiting block is installed in the bottom groove of the slewing bearing; and the explosion-proof proximity switch is fixed on the swing plate through threads. Beneficial effects

[0025] The explosion-proof differential rudder wheel system with the caliper brake provided by the utility model can provide forward and backward power for the differential rudder wheel system by inputting torque through the driving motor, passing through the gear box, the differential, and the driving speed reducer, and outputting to the tire, can make the inner and outer wheels rotate at different speeds when the rudder wheel is turning at high speed, improves the driving efficiency, effectively guarantees the stability of vehicle operation, and can provide better controllability under emergency obstacle avoidance or complex road conditions. When an unexpected situation occurs and emergency braking is needed, the brake torque provided by the caliper brake assembly acts on the tire through the gear box, the differential, and the driving speed reducer, can provide great brake torque for the rudder wheel, makes the rudder wheel complete braking in a short time and a short distance, and the caliper brake assembly has long service life and is easy to replace. The differential rudder wheel system is sealed at each part, adopts explosion-proof electrical elements, and is subjected to explosion-proof treatment, and can effectively prevent fire or explosion of the external environment caused by the electrical, transmission, and brake of the rudder wheel itself.

[0026] Compared with the prior art, the utility model has the beneficial effects that:

[0027] The brake disc in the caliper brake assembly is connected with the gear box of the rudder base assembly through the brake input shaft. When emergency braking is needed, the pressure is transmitted through the hydraulic pipeline or the signal is transmitted through the cable, and acts on the caliper. At this time, the caliper friction plate starts to apply pressure to the brake disc in the middle, and the brake torque is generated on the brake disc. The brake torque acts on the tire through the gear box, differential, and speed reducer, and the differential rudder brake. This caliper brake can produce greater brake torque than the motor parking brake, so that the braking distance of the differential rudder is shorter, and the service life of the caliper brake is longer and is easy to replace.

[0028] The swing plate in the steering swing assembly is connected with the rudder base assembly through two groups of bearings and bearing end covers. When the differential wheel travels on uneven road surface, the swing cylinder can realize 3° swing through the bearings, so that the differential wheel and the vehicle body connection are in a horizontal state, and the vehicle body is prevented from being unstable to cause the goods to overturn.

[0029] When the swing angle of the slewing bearing in the steering swing assembly exceeds the specified angle, the mechanical limiting block at the bottom of the slewing bearing triggers the explosion-proof proximity switch. The explosion-proof proximity switch generates a signal transmission to the driver, and the motor gradually reduces to stop rotating. At the same time, the mechanical limiting block will hit the mounting plate, so that the steering action stops.

[0030] The differential rudder system of the utility model, aiming at the explosion-proof demand, makes explosion-proof protection to the high-speed rotating gear system and the caliper brake assembly, and selects explosion-proof electrical elements for the electrical elements, so that the differential rudder system is more suitable for the environment needing explosion-proof. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the utility model, the drawings needed to be used in the utility model will be simply introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for the ordinary skilled in the art.

[0032] Figure 1 It is the structure front view in the embodiment of the utility model;

[0033] Figure 2 It is the structure rear view in the embodiment of the utility model;

[0034] Figure 3 It is the structure front view in the embodiment of the utility model;

[0035] Figure 4 It is the structure side view in the embodiment of the utility model;

[0036] Figure 5It is the caliper brake assembly structure schematic diagram in the embodiment of the utility model;

[0037] The marks in the figure represent:

[0038] 1-drive motor;2-base;3-steering motor;4-steering speed reducer;5-steering gear;6-slewing bearing;7-mounting plate;8-drive motor speed reducer;9-tire;10-base cover plate;11-oscillating plate;12-transmission shaft;13-fixed sleeve;14-differential;15-bowl tooth;16-differential input gear;17-motor input gear;18-transmission gear;19-output gear;20-brake input gear;21-first bearing end cover, 22-second bearing end cover, 23 third- bearing end cover;24-gearbox end cover;25-brake input shaft;26-caliper;27-brake disc;28-brake explosion-proof housing;29-explosion-proof gland;30-sliding bearing end cover;31-nylon protective sleeve;32-caliper support;33-mechanical limiting block;34-explosion-proof proximity switch. DETAILED DESCRIPTION

[0039] The technical scheme in the embodiments of the utility model will be clearly and completely described below with the drawings in the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0040] The kind of having caliper brake's explosion-proof differential rudder wheel system, including rudder wheel base assembly, drive wheel assembly, differential assembly, steering oscillating assembly, caliper brake assembly.

[0041] The rudder wheel base assembly is used for the load bearing of differential rudder wheel, the power transmission of differential rudder wheel, including drive motor 1, base 2, motor input gear 17, transmission gear 18, output gear 19, brake input gear 20, bearing end cover, gearbox end cover 24, brake explosion-proof housing 28, sealing element (sealing ring, rotary skeleton sealing ring, sealing plug);In the embodiment, it contains three bearing end covers, as shown in the figure, containing first bearing end cover 21, second bearing end cover 22, third bearing end cover 23, is used for adjusting the bearing clearance of motor input gear, transmission gear 18 and output gear respectively;For sealing gear box assembly.

[0042] The motor input gear 17, transmission gear 18, output gear 19, brake input gear 20 are mounted on the base 2 through bearings. The gear box end cover 24 is mounted on the base 2 through cylindrical pins, screws, and a stop after the bearings and sealing rings are installed. The bearing end cover is mounted on the base 2 through a stop and screws after the bearings and sealing rings are installed. At this time, the gears are completely positioned, and then the remaining sealing components of the base 2 gear box portion are installed. The drive motor 1 is mounted on the base 2 through keys, screws, and a stop. The brake explosion-proof housing 28 is pressed into the sealing ring and connected to the base 2 with screws after the differential assembly and drive wheel assembly are installed on the base.

[0043] The differential assembly is used for power distribution of the differential rudder wheel and includes a differential 13, a cup gear 15, and a differential input gear 16. The cup gear 15 is connected to the differential 13 through screws. The differential input gear is fixed to the output gear 19 through bearings, screws, and a screw end cover. The differential assembly is mounted on the base 2 through bearings and a fixing sleeve 13.

[0044] The drive wheel assembly is used for walking of the differential rudder wheel and includes a tire 9, a drive reducer 8, a transmission shaft 12, a fixing sleeve 13, and sealing components. The fixing sleeve 13 is mounted on the base assembly through screws after the sealing ring and bearings are installed. The differential assembly is mounted on the fixing sleeve 13 through bearings on the other side of the base, at which time another fixing sleeve 13 is installed. The transmission shaft 12 is connected to the differential assembly through keys by passing through the internal skeleton sealing ring of the fixing sleeve 13. The drive reducer 8 is mounted on the fixing sleeve 13 through screws and a stop and is connected to the transmission shaft 12 through keys. The tire 9 is mounted on the drive reducer 8 through screws and a stop.

[0045] The steering swing assembly is used for steering and small-angle swinging of the differential rudder wheel and includes a steering motor 3, a steering reducer 4, a steering pinion 5, a slewing bearing 6, a mounting plate 7, a swing plate 11, a sliding bearing end cover 30, a nylon protective sleeve 31, a mechanical limiting block 33, and an explosion-proof proximity switch 34. The swing plate 11 is divided into left and right parts and is mounted on the base 2 through sliding bearings and a sliding bearing end cover 30. The nylon protective sleeve 31 is fixed on the swing plate 11 through screws. The slewing bearing 6 and the mounting plate 7 are mounted on the swing plate 11 through screws and cylindrical pins. The steering motor 3 is mounted on the steering reducer 4 through screws and a stop. The steering reducer 4 is mounted on the mounting plate 7 through screws and a stop. The steering pinion 5 is mounted on the steering reducer 4 through a gasket and screws. The mechanical limiting block 33 is mounted in the bottom groove of the slewing bearing 6 through screws. The explosion-proof proximity switch 34 is fixed on the swing plate 11 through screws.

[0046] The caliper brake assembly is used for differential rudder wheel emergency braking, comprising brake input shaft 25, caliper 26, brake disc 27, explosion-proof brake housing 28, explosion-proof gland 29, caliper support 32, sealing element. The brake input shaft 25 is mounted on the brake input gear 20 through bearings, screws and keys, and the caliper brake assembly is sealed and isolated from the rudder wheel base assembly through sealing plugs and rotating skeleton sealing rings. The caliper 26 is mounted on the caliper support 32 through screws. The caliper support 32 is mounted on the rudder wheel base assembly through screws and cylindrical pins. The brake disc 27 is mounted on the brake input shaft 25 through screws. The explosion-proof gland 29 is mounted on the explosion-proof brake housing 28 through threaded connection. The explosion-proof brake housing 28 is mounted on the rudder wheel base assembly through screws after mounting the sealing ring.

[0047] The differential rudder wheel system, the driving, steering motor anti-torsion cable, the caliper brake assembly (anti-torsion oil pipe or cable) enters the nylon protective sleeve 31 of the steering swing assembly, and the wire is drawn out from the slewing bearing 6.

[0048] The differential rudder wheel system, when in use, due to the high-speed rotation of the differential and the base gear box gear, needs to fill gear oil in the inner cavity of the base 2, and the gear oil is immersed in the basin tooth height 3 / 4.

[0049] The explosion-proof differential rudder wheel system with a caliper brake disclosed in the application can solve the problem of rudder wheel instability caused by different rotation speeds between two wheels during turning, and can stably operate in an explosion-proof environment and realize short-time and short-distance emergency braking. The method comprises a rudder wheel base assembly, a differential assembly, a driving wheel assembly, a steering swing assembly and a caliper brake assembly.

[0050] Through the input torque of the driving motor, after the gear box, the differential and the driving speed reducer, the output is output to the tire, which provides forward and backward power for the differential rudder wheel system, and under the action of the differential assembly, the inner and outer wheels of the rudder wheel can rotate at different speeds during high-speed turning, which improves the driving efficiency and effectively ensures the stability of vehicle operation. When an emergency braking is needed in an unexpected situation, the brake torque provided by the caliper brake assembly acts on the tire through the gear box, the differential and the driving speed reducer, so that the rudder wheel can complete braking in a short time and a short distance. The explosion-proof sealing is made to each component of the differential rudder wheel, and explosion-proof electrical elements are used, which can effectively prevent fire or explosion of the external environment caused by the differential rudder wheel itself.

[0051] The brake disc in the caliper brake assembly is connected with the gear box of the rudder base assembly through the brake input shaft. When emergency braking is needed, the pressure is transmitted through the hydraulic pipeline or the signal is transmitted through the cable, and acts on the caliper. At this time, the caliper friction plate starts to apply pressure to the brake disc in the middle, and generates a braking torque on the brake disc. The braking torque acts on the tire through the gear box, differential, and speed reducer, and the differential rudder brake. This kind of caliper brake can produce greater braking torque than the motor parking brake, so that the differential rudder braking distance is shorter, and the service life of the caliper brake is longer and easy to replace.

[0052] The swing plate in the steering swing assembly is connected with the rudder base assembly through two groups of bearings and bearing end covers. When the differential wheel travels on uneven road surface, the swing cylinder can realize 3° swing through the bearings, so as to ensure that the differential wheel and the vehicle body connection are in a horizontal state, and prevent the vehicle body from being unstable to cause the goods to overturn;

[0053] When the swing angle of the swing bearing in the steering swing assembly exceeds the specified angle, the mechanical limiting block at the bottom of the swing bearing will trigger the explosion-proof proximity switch. The explosion-proof proximity switch generates a signal transmission to the driver, and the motor gradually reduces to stop rotating. At the same time, the mechanical limiting block will hit the mounting plate, so that the steering action stops;

[0054] The differential rudder system of the utility model, aiming at the explosion-proof demand, makes explosion-proof protection to the high-speed rotating gear system and the caliper brake assembly, and selects explosion-proof electrical elements for the electrical elements, so that the differential rudder system is more suitable for the environment needing explosion-proof.

Claims

1. An explosion-proof differential steering wheel system with caliper brakes, characterized in that, The steering wheel system includes a caliper brake assembly for emergency braking of the differential steering wheel. The caliper brake assembly is mounted on the steering wheel base assembly and is sealed and isolated from the steering wheel base assembly. The brake disc in the caliper brake assembly is connected to the gearbox of the steering wheel base assembly via a brake input shaft. Pressure is transmitted through hydraulic lines or signals are transmitted through cables, which act on the caliper. The caliper friction pads close, applying pressure to the brake disc in the middle, and generating braking torque on the brake disc. The caliper brake assembly includes a brake input shaft, a caliper, a brake disc, a brake explosion-proof housing, an explosion-proof gland, a caliper bracket, and seals; the caliper bracket is mounted on the steering wheel base assembly, and the caliper is mounted on the caliper bracket. The brake input shaft is mounted on the brake input gear via bearings and screws; the brake disc is mounted on the brake input shaft via screws. The explosion-proof gland is mounted on the brake explosion-proof housing, which is equipped with a sealing ring and mounted on the steering wheel base assembly.

2. The explosion-proof differential steering wheel system with caliper brakes according to claim 1, characterized in that, The caliper brake assembly and the steering wheel base assembly are kept sealed and isolated by a sealing plug and a rotating skeleton sealing ring.

3. The explosion-proof differential steering wheel system with caliper brakes according to claim 1, characterized in that, The steering wheel system also includes a steering wheel base assembly, a differential assembly, a drive wheel assembly, and a steering oscillation assembly; The steering wheel base assembly is used for bearing the differential steering wheel and transmitting power to the differential steering wheel. The differential assembly is used for power splitting of the differential steering wheel. It is mounted on the steering wheel base assembly through bearings and a fixing sleeve. The drive wheel assembly is used for the movement of the differential steering wheel, and the steering oscillation assembly is used for the steering and small-angle oscillation of the differential steering wheel.

4. The explosion-proof differential steering wheel system with caliper brake according to claim 3, characterized in that, The steering wheel base assembly includes a drive motor, a base, a motor input gear, a transmission gear, an output gear, a brake input gear, a bearing end cover, a gearbox end cover, a base end cover, and a seal. The base is the support structure for the steering wheel. A drive motor is installed on the base. A transmission gear is installed outside the motor input gear. The transmission gear transmits the motor output to the output gear located in the middle of the base. The other side of the transmission gear is the brake input gear. Each gear is equipped with a bearing end cover, and a sealing element is provided on the outside of the bearing end cover. The bearing end cover is fixed to the gearbox end cover by screws.

5. The explosion-proof differential steering wheel system with caliper brake according to claim 3, characterized in that, The differential assembly includes a differential, a bevel gear, and a differential input gear. The bevel gear is connected to the differential by screws. The differential input gear is fixed to the output gear by bearings, screws, and screw end caps.

6. The explosion-proof differential steering wheel system with caliper brakes according to claim 3, characterized in that, The drive wheel assembly includes a tire, a drive reducer, a drive shaft, a retaining sleeve, and seals; the drive reducer is located on the tire axle side, and the drive shaft is connected between the drive reducer and the differential; the retaining sleeve is mounted on the base assembly, and the drive shaft is embedded in the retaining sleeve; the differential assembly is mounted on the retaining sleeve via bearings; the drive shaft is connected to the differential assembly via a key.

7. The explosion-proof differential steering wheel system with caliper brake according to claim 3, characterized in that, The steering swing assembly includes a steering motor, a steering reducer, a steering pinion, a slewing bearing, a mounting plate, a swing plate, a sliding bearing end cover, a mechanical limit block, and an explosion-proof proximity switch; the swing plate is divided into left and right parts, which are mounted on the base via sliding bearings and sliding bearing end covers; The slewing bearing and mounting plate are mounted on the swing plate; the steering motor is mounted on the steering reducer; the steering reducer is mounted on the mounting plate; the steering pinion is mounted on the steering reducer; the mechanical limit block is mounted in the bottom groove of the slewing bearing; and the explosion-proof proximity switch is fixed to the swing plate by threads.

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