Tractor based on hub reduction gear

Abstract

The utility model discloses a tractor based on a hub reduction gear, which comprises a tractor main body comprising a tractor body, a tractor frame and wheels; the driving system comprises a driving motor and a transmission module, the output end of the driving motor is connected with the transmission module through a transmission part, and the transmission module is connected with wheels; the braking system comprises a dry braking module and a hydraulic braking module, the dry braking module is connected to the transmission module, and the hydraulic braking module is connected to the dry braking module; when the tractor is adjusted from the full-load speed to the first speed state, the driving motor brakes, when the tractor is adjusted from the first speed state to the second speed state, the braking system brakes, and the speed of the first speed state is larger than that of the second speed state. The operation speed of the tractor can reach 15 km / h, dispatching operation in a production line of an internal combustion locomotive and a highway-railway tractor can be replaced, non-pulling wheel lathe operation can be completed in an auxiliary mode, and the tractor has the advantages of being easy to operate, convenient to maintain, high in operation efficiency, intelligent and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to rail transit technical field, concretely is traction vehicle based on wheel edge speed reducer. BACKGROUND

[0002] During the thirteenth five-year period, the metro operating mileage and new line construction mileage of China grow rapidly, according to the national and local fourteen five planning and national policy, the fourteen five or even fifteen five of China's metro operating mileage will continue to grow rapidly. In order to meet the safe and stable operation of line and vehicle under high intensity frequent use, the market demand of engineering vehicle is greatly improved.

[0003] With more and more vehicles responsible for maintenance in the same metro field line, metro marshalling vehicles need to enter the metro vehicle depot periodically for daily inspection, monthly inspection, repair, wheel grinding and other operations. At present, the scheduling of marshalling vehicles is mainly carried out by diesel shunting and battery public and private traction vehicles. Diesel shunting has serious environmental pollution and high operating noise, and lacks high-precision positioning, which cannot meet the wheel grinding repair operation without falling. The scheduling speed of public and private traction vehicles is low, only 3km / h, and the operation efficiency is low. It is difficult to meet the increasing heavy transfer maintenance and wheel grinding repair of marshalling vehicles. UTILITY MODEL CONTENTS

[0004] In order to solve the problems of the prior art, the traction vehicle based on wheel edge speed reducer is provided, which comprises:

[0005] The traction vehicle body comprises a vehicle body, a vehicle frame and a wheel, and the vehicle body and the wheel are connected to the vehicle frame.

[0006] The driving system comprises a driving motor and a transmission module, the output end of the driving motor is connected to the transmission module through a transmission part, and the transmission module is connected to the wheel.

[0007] The brake system comprises a dry brake module and a hydraulic brake module, the dry brake module is connected to the transmission module and coaxially arranged with the driving motor and the transmission module, and the hydraulic brake module is connected to the dry brake module.

[0008] When the traction vehicle is adjusted from full load speed to first speed state, the driving motor is braked, and when the traction vehicle is adjusted from first speed state to second speed state, the brake system is braked, wherein the speed of first speed state is greater than the speed of second speed state.

[0009] Further, the transmission module comprises:

[0010] The input shaft is connected to the output end of the driving motor through the transmission part.

[0011] The primary planetary carrier comprises a primary planet carrier, a primary sun gear and a plurality of primary planetary gears, the primary planet carrier is connected with the plurality of primary planetary gears through bearings, and the primary sun gear is connected with the input shaft and simultaneously meshes with the toothed gears of the plurality of primary planetary gears;

[0012] The secondary planetary carrier comprises a secondary planet carrier, a secondary sun gear and a plurality of secondary planetary gears, the secondary planet carrier is connected with the plurality of secondary planetary gears through bearings, and the secondary sun gear is connected with the primary planet carrier and simultaneously meshes with the toothed gears of the plurality of secondary planetary gears;

[0013] The secondary planet carrier is connected with the wheels.

[0014] Further, three groups of the primary planetary gears and the secondary planetary gears are respectively arranged circumferentially on the primary planet carrier and the secondary planet carrier, the primary sun gear is arranged between the three groups of the primary planetary gears, and the secondary sun gear is arranged between the three groups of the secondary planetary gears.

[0015] Further, the transmission member is configured as a spline.

[0016] Further, the dry brake module adopts a dry brake, and the dry brake is arranged between the driving motor and the transmission module.

[0017] Further, the tractor body has six groups of wheels, and the six groups of wheels are all provided with the dry brake module, and four groups of wheels are provided with the driving system.

[0018] Further, the wheels adopt rubber-coated wheels, and the tread of the wheel is made of polyurethane material.

[0019] Further, the tractor body further comprises a suspension damping component, the suspension damping component comprises a flange plate, a mounting seat and a shock absorber, the mounting seat is connected with the frame, the flange plate is connected with the wheel, and the shock absorber is connected between the flange plate and the mounting seat.

[0020] Further, the full load speed of the tractor is 15 km / h, and the first speed is 5 km / h.

[0021] Further, the tractor further comprises:

[0022] The power supply system comprises a battery module, a high-voltage control module and a low-voltage control module which are electrically connected in sequence, and the high-voltage control module is electrically connected with the driving motor;

[0023] The monitoring system comprises a temperature monitoring module, an open fire monitoring module and an electric leakage monitoring module, the temperature monitoring module and the open fire monitoring module are used for monitoring the battery module, and the electric leakage monitoring module is used for monitoring the high-voltage control module.

[0024] The control system is electrically connected with the driving system, the braking system, the power supply system and the monitoring system.

[0025] Further, the monitoring system further comprises a cooling module and a fire extinguishing module, which are respectively used for cooling and extinguishing the battery module.

[0026] The traction vehicle based on the wheel-side reducer provided by the application can cover the work of the repair shop, the lapping bed line and the shunting line, meets the market demand, has the characteristics of "pure electric", "railway running", "metro marshalling vehicle scheduling and auxiliary completion of non-falling wheel lapping bed operation" in the field line, operation speed of 15km / h, improvement of driving comfort, guarantee of operation in complex environment and multiple working conditions, improvement of line operation efficiency and enhancement of actual operation safety and reliability, realizes more intelligent and humanized operation of the operator, and the like. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application;

[0028] Figure 2 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application; Figure 1 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application;

[0029] Figure 3 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application;

[0030] Figure 4 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application;

[0031] Figure 5 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application; Figure 4 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application;

[0032] Figure 6 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application; Figure 4 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application;

[0033] Figure 7 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application; Figure 4 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application;

[0034] Figure 8 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application;

[0035] Figure 9 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application; Figure 1 It is an embodiment structure schematic diagram of the traction vehicle based on the wheel-side reducer of the application. DETAILED DESCRIPTION

[0036] In order to make the personnel in the technical field better understand the scheme of the present application, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0037] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0038] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0039] Also, in addition to indicating the orientation or positional relationship, the above-mentioned part of the terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meaning of these terms in the present application can be understood according to the specific circumstances.

[0040] In addition, the terms "mount", "set", "provided with", "connected", "connected", "sleeved" should be broadly understood. For example, it can be a fixed connection, a detachable connection, or a monolithic structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0042] Referring to Figures 1-8 The present embodiment provides a traction vehicle based on a wheel-side reducer, comprising a traction vehicle body 100, a driving system 200, a dry brake module 300, a hydraulic brake module 400, a power supply system 500, and a monitoring system 600.

[0043] Referring to Figures 1-3 The traction vehicle body 100 comprises a vehicle body 110, a vehicle frame 120, and vehicle wheels 130, wherein the vehicle frame 120 is connected to the vehicle body above and the vehicle wheels below as a connecting component, the vehicle body 100 is provided with a cab to meet the needs of manual driving, the vehicle frame 120 is divided into an upper frame 121 and a lower frame 122, responsible for carrying and installing various systems, and ensuring the connection and transmission between various systems.

[0044] The traction vehicle body 100 further comprises a suspension damping component 140, the vehicle frame 120 is divided into an upper frame 121 and a lower frame 122, the suspension damping component comprises a flange plate 141, a shock absorber 142, and a mounting seat 143, the mounting seat 143 is connected between the upper frame 121 and the lower frame 122, the flange plate 141 is connected to the wheel side of the vehicle wheel 130, and the shock absorber 142 is installed on the flange plate 141.

[0045] The vehicle wheel 130 has six groups, arranged as shown in the figure, and each of the six groups of vehicle wheels is provided with a dry brake module 300, wherein the front and rear four groups of vehicle wheels are each provided with a driving system 200, that is, the whole vehicle adopts a four-wheel drive and six-wheel brake mode, the vehicle frame 120 is connected to the driving system 200 through the suspension damping component 140, and a lightening hole is opened on the vehicle frame for arranging oil pipes and electrical lines of the hydraulic brake module.

[0046] The vehicle body 110 is designed and shaped in combination with the oil painting scheme according to the whole vehicle function requirements, the size arrangement of the vehicle-mounted components, the modularization concept, the operation convenience, the maintenance convenience, the structural reliability, and the aesthetic appearance of the industrial modeling, and the like, and the related functions are confirmed, and then the industrial modeling design is made in combination with the oil painting scheme, the vehicle body shell is made of high-weather-resistant steel with a thickness of 2-3 mm by tailor welding, has the advantage of rust prevention of the material matrix, and is subjected to surface process treatment of sand blasting, primer, and topcoat to meet the overall rust prevention requirements, and has good rust prevention ability in acid rain, salt fog, and long-term exposure to air; the whole vehicle frame and the vehicle body are designed in a closed manner, and the air vents, wire holes, pipeline holes, and grease injection ports connected to the outside are sealed to meet the requirements of waterproofing, mold prevention, dust prevention, and pest control.

[0047] The wheel 130 adopts a rubber-coated wheel, the wheel core adopts forged steel material, the tread adopts polyurethane material, the rim profile is designed according to the LM type of TB449, the rim width is 137mm, the polyurethane material is responsible for ensuring that the wheel and the rail have sufficient friction coefficient, providing the traction and braking force of the whole vehicle, Chemlok-213 / Chemlok-219 adhesive is adopted, the peel strength of the polyurethane can reach 31.5kN / m, the effective bonding width of the rubber-coated form adopted is 139.5mm, the calculated cross-sectional bonding force is 4.4kN, the braking force on the wheel during the emergency braking of the whole vehicle is 3.5kN, meeting the design requirements. The hardness of the polyurethane is controlled at the best of Shore A 90~92; the rubber-coated wheel is adopted, the wheel-rail adhesion coefficient can reach about 0.5, which can maximize the driving force of the whole vehicle and shorten the braking distance.

[0048] The tractor body further comprises a traction hitching component 140, which is modularly designed according to functions, and is divided into a traction seat freedom module, a coupler and automatic uncoupling module, and a coupler distance monitoring module. The modules are connected through standard parts to ensure the intercommunication of the function requirements and the module combination. The coupler connecting plate and the traction rod seat are connected through a pin shaft, and the left and right and the upper and lower are limited by rubber blocks. The installation position is determined by the coupler swing angle. The pin shaft joint bearing is selected as GE35ES, with a basic rated dynamic load of 79kN and a basic rated static load of 339kN. Since the metro marshalling vehicle adopts a 330 type coupler, the coupler of the vehicle adopts a 330 type coupler adapter, and the coupler center line height is 660±10mm. The coupler module has an automatic uncoupling function.

[0049] Referring to Figures 4-8 , the driving system 200 adopts a distributed wheel hub driving system, including a driving motor 210 and a transmission module 220. The output end of the driving motor 210 is connected to the transmission module 220 through a spline 211, and the transmission module is connected to the wheel 130.

[0050] Specifically, the transmission module 220 includes an input shaft 223, a first planetary gear carrier 221, and a second planetary gear carrier 222. One end of the input shaft 223 is connected to the output end of the driving motor 210 through the spline 211. The first planetary gear carrier 221 includes a first planetary carrier 2211, a first sun gear 224, and three first planetary gears 2212. The three first planetary gears 2212 are arranged circumferentially on the first planetary carrier 2211 through bearings. The other end of the input shaft 223 is connected to the first sun gear 224, which is in meshing engagement with the teeth of the three first planetary gears 2212. The second planetary gear carrier 222 includes a second planetary carrier 2221, three second planetary gears 2222, and a second sun gear 2223. The second sun gear 2223 is arranged on the other side of the first planetary carrier 2211. The three second planetary gears 2222 are arranged circumferentially on the second planetary carrier 2221 through bearings. The other end of the second sun gear 2223 is arranged inside the three second planetary gears 2222 and is in meshing engagement with the three second planetary gears. The three first planetary gears and the three second planetary gears share an inner ring gear 225 on the outside. The inner ring gear 225 is fixed through a connecting flange 226, which is connected to a mounting seat 227. One side of the mounting seat 227 is connected to a brake, and the other side is connected to a flange plate 141. The connecting flange 226 has external teeth that mesh with the internal teeth of the inner ring gear to fix the inner ring gear. The internal teeth of the inner ring gear are also in meshing engagement with the teeth of the three first planetary gears and the three second planetary gears. The second planetary carrier 2221 is finally connected to the hub shell 131 of the wheel.

[0051] When the input shaft 223 drives the first sun gear 224 to rotate, the teeth of the first sun gear drive the first planetary gears 2212 to rotate. Since the inner ring gear is fixed, the rotation of the first planetary gears 2212 drives the first planetary carrier 2211 to rotate, which in turn drives the three second planetary gears to rotate through the connected second sun gear. Finally, the rotation of the second planetary carrier 2221 is realized through the action of the inner ring gear, and the torque is output to the hub shell 131. Since the number of teeth of the inner ring gear is greater than that of the sun gear, the rotational speed of the output shaft is lower than that of the input shaft, achieving the function of speed reduction. At the same time, due to the existence of the planetary carrier, the torque of the output shaft is greater than that of the input shaft, achieving the function of torque transmission.

[0052] The driving system 200 adopts a coaxial arrangement, which shortens the transmission chain and improves transmission efficiency compared to the driving form of transmission. It is also beneficial to the lightweight and simple structure design of the whole vehicle. The driving motor is a water-cooled motor, which is cooled by a radiator to prevent high-temperature damage to the motor.

[0053] The dry brake module 300 adopts a row-station integrated full-disc dry brake, is coaxially arranged with the driving motor and the transmission module, and is connected to the mounting seat 227. The whole vehicle adopts four-wheel independent driving and six-wheel braking. When the vehicle is fully loaded and runs at a speed of 15-5 km / h, the driving motor is used for normal braking speed regulation. When the vehicle runs at a speed below 5 km / h, mechanical hydraulic service braking is used. The parking brake and emergency brake use a parking spring brake. The dry brake and the transmission module are designed as an integrated product.

[0054] Referring to Figure 8 , the hydraulic brake module 400 includes an oil tank 401, a direct-current motor 402, a manual pump 403, an accumulator 404, a hydraulic valve group 405, and a pressure sensor 406. The hydraulic brake module serves as a power source of the whole brake system, is connected with the dry brake through an oil pipe 407, and transmits pressure to the accumulator by the pump driven by the direct-current motor. When the pressure of the accumulator reaches a set upper limit, the motor is turned off. The pressure sensor can display the pressure value of each hydraulic circuit in real time and feed back to the control system. The manual pump serves as an emergency power source to provide power for the whole hydraulic system.

[0055] The hydraulic brake module has pressure establishment, storage, and pressure adjustment functions, and mainly realizes service braking, parking braking, holding braking, and manual braking functions. The hydraulic brake module is divided into active and passive control modes, which are respectively used to control the active hydraulic unit and the passive hydraulic unit. The active hydraulic unit controls the pressure by electrically controlling the hydraulic valve group, so as to apply or release the brake. The passive hydraulic unit controls the pressure value of the applied or released brake by strictly controlling the sequence of the proportional valve and the on-off valve in the hydraulic valve group, so as to prevent the pressure from being suddenly unloaded or suddenly released, which causes the brake force to fluctuate too much.

[0056] Specifically, the service brake: when the vehicle speed is reduced to 5 km / h during full load operation, the hydraulic brake is started, the brake oil pipe generates oil pressure, friction is generated between the friction plates, and the vehicle is braked to a stop. The parking brake: when parking, the oil cavity is depressurized, the parking piston moves to the friction pair under the action of the parking spring, sequentially pushes the service piston, the single-sided friction plate, and the brake disc, the single-sided friction plate moves to the front end cover, and finally the friction pair is pressed to the front end cover, the torque is established between the friction plate and the brake disc, and the rotation of the stationary brake disc is prevented. The holding brake: when the vehicle is parked and started on the maximum slope of the line 1.5‰, the brake system ensures that the vehicle does not slip under the maximum load. When the vehicle speed is zero, the holding brake function is triggered when the traction control handle is in the non-traction level. The manual brake: the manual pump of the hydraulic system serves as an emergency power source to provide power for the whole hydraulic system, and the manual brake is released.

[0057] The power supply system 500 includes a battery module, a high-voltage control module and a low-voltage control module, the whole vehicle power is provided by the battery, the battery is electrically connected with the high-voltage control module, the high-voltage control module is electrically connected with the controller of the driving motor, the controller controls the driving motor to realize the whole vehicle running; the high-voltage control module is electrically connected with the low-voltage control module in another way, the low-voltage control module converts high-voltage power into low-voltage power, and supplies power to the low-voltage components of the whole vehicle, such as air conditioner, hydraulic pump station, vehicle lamp, touch screen, horn and the like.

[0058] While ensuring the realization of the basic functions, the work safety and the intelligentization improvement of the whole vehicle also need to be considered to ensure the safety of the vehicle, the line and the personnel. Therefore, the interlocking monitoring technology, the high-voltage insulation detection and the automatic power-off protection technology are adopted.

[0059] The industrial battery of the vehicle requires a direct current 540V voltage output, a rated current 220A, a peak current 450A, an industrial battery capacity 150-160kw.h, and therefore needs to be equipped with a cooling module and a fire extinguishing module for management and control.

[0060] The industrial battery of the vehicle requires a direct current 540V voltage output, a rated current 220A, a peak current 450A, an industrial battery capacity 150-160kw.h, and the power of 20% and above needs to ensure the normal operation of the driving motor, the working environment meets the technical requirements, the charging time is less than or equal to 8h, and the overall protection level of the battery is IP67. The safety performance of the battery meets the requirements of GB18384-2020 “Safety Requirements for Electric Vehicles”, GB38031-2020 “Safety Requirements for Power Storage Batteries for Electric Vehicles”, GB38032-2020 “Safety Requirements for Electric Vehicles”, and GB / T 4208-2017 “Enclosure Protection Level”.

[0061] Table 1 Technical parameters of lithium iron phosphate battery

[0062] The voltage of the industrial battery of the vehicle is relatively high, and a voltage protection scheme needs to be considered to prevent high voltage from harming the workers, and the emergency power-off situation in the case of short circuit, fire and other accidents also needs to be considered. Due to the characteristics of the material itself, the lithium iron phosphate battery has stable material structure at high temperature and overcharge; and it has a strict BMS battery management system. The safety test of the battery includes experiments such as needle puncture, extrusion, short circuit, thermal stability, vibration, high and low temperature cycle, smoke detection, fire extinguishing device function, water immersion and water spray experiment, IP68 protection standard, EMC, equipotential and other safety design. It has a manual maintenance switch to ensure high voltage power-off during maintenance, and a BMS message to ensure safety detection and alarm during battery operation.

[0063] The monitoring system 600 comprises a temperature monitoring module, an open flame monitoring module and an electric leakage monitoring module. In a high temperature environment, the battery cell temperature is difficult to dissipate, and the battery has a safety risk. Generally, a liquid cooling method is used for cooling treatment. The battery box is provided with a cooling liquid circulation pipeline. The cooling liquid is provided by a liquid cooling unit, and the cooling liquid is driven to circulate. Heat is transferred to the liquid cooling unit through the cooling liquid, and then the high temperature cooling liquid is cooled by a fan of the liquid cooling unit, and then recycled to the inside of the battery box.

[0064] The open flame monitoring module is monitored by a detector. When an open flame is detected, the fire extinguishing module is started. The fire extinguishing module comprises a fire extinguisher, a storage tank (perfluorohexone), a central controller display screen and a manual trigger button (required). The detector and the fire extinguisher are pre-installed in the standard battery box, and the rest are installed outside through a pipeline connection. The extinguishing agent in the protection module is perfluorohexone, which is a liquid at room temperature. When extinguishing a fire, it directly acts on the surface of the cell to suppress the open flame, and can quickly convert into a gas while absorbing the heat of the surrounding environment to achieve the effect of rapid cooling.

[0065] The whole vehicle is provided with an electric leakage protection sensor in the high-voltage high-power electric component. When the current is slightly unbalanced, the function of automatically cutting off the circuit is achieved, and the effect of electric leakage protection is achieved. The whole vehicle is provided with a leakage current Hall sensor on the high-voltage bus, which can monitor the electric leakage of the high-voltage loop at any time. The system will alarm and disconnect the high-voltage circuit in time.

[0066] Since the whole vehicle is made of metal, its outer surface is a metal shell, which is equivalent to a Faraday cage. When a lightning strike occurs in the rain, the vehicle shell is an equipotential body, and the operator in the cab is relatively safe. The excess current will be transmitted to the steel rail through the grounding device. The electronic equipment in the vehicle may be damaged when it is struck by lightning, causing the equipment to leak, catch fire, explode, and indirectly harm the personnel. Therefore, the vehicle will add relevant lightning protection devices to the high-voltage high-power components, thereby ensuring the safety of the high-voltage equipment.

[0067] The whole vehicle has a high-voltage interlock detection function, which can monitor the connection state of the high-voltage connector at any time. When the vehicle starts, the system will only power on when the high-voltage connector is connected well. When the high-voltage connector is loose or disconnected during vehicle operation, the high-voltage circuit will be disconnected in time to avoid potential safety accidents. The high-voltage high-power components on the vehicle are provided with overvoltage, overcurrent and overtemperature protection functions, and always transmit relevant alarm information to the upper computer through the CAN bus for real-time monitoring and fault analysis.

[0068] The traction vehicle of the present application further comprises a control system for controlling the above-mentioned systems, which can realize the functions of forward movement, backward movement, braking, parameter display, battery management, fault code display, vehicle hook coupling distance monitoring and reminding of the whole vehicle, and can realize remote wireless remote control of the remote controller.

[0069] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A wheel reduction based tractor, characterized in that, The traction vehicle comprises: a traction vehicle body comprising a vehicle body, a vehicle frame and vehicle wheels, the vehicle body and the vehicle wheels being connected to the vehicle frame; a drive system comprising a drive motor and a transmission module, an output end of the drive motor being connected to the transmission module through a transmission member, the transmission module being connected to the vehicle wheels; a brake system comprising a dry brake module and a hydraulic brake module, the dry brake module being connected to the transmission module and coaxially arranged with the drive motor and the transmission module, the hydraulic brake module being connected to the dry brake module; when the traction vehicle is adjusted from a full load speed to a first speed state, braking is performed by the drive motor, and when the traction vehicle is adjusted from the first speed state to a second speed state, braking is performed by the brake system, wherein the speed of the first speed state is greater than the speed of the second speed state.

2. The wheel-reduction-gear-based tractor according to claim 1, characterized in that: The transmission module comprises: an input shaft connected to the output end of the drive motor through the transmission member; a first planetary gear carrier comprising a first planetary carrier, a first sun gear and a plurality of first planetary gears, the first planetary carrier being connected to the plurality of first planetary gears through bearings, the first sun gear being connected to the input shaft and simultaneously meshing with the toothed gears of the plurality of first planetary gears; a second planetary gear carrier comprising a second planetary carrier, a second sun gear and a plurality of second planetary gears, the second planetary carrier being connected to the plurality of second planetary gears through bearings, the second sun gear being connected to the first planetary carrier and simultaneously meshing with the toothed gears of the plurality of second planetary gears; an inner ring fixed through a connecting flange, the inner teeth of the inner ring simultaneously meshing with the toothed gears of the plurality of first planetary gears and the plurality of second planetary gears; wherein the second planetary carrier is connected to the vehicle wheels.

3. The wheel-reduction-gear-based tractor as claimed in claim 2, wherein: Three groups of first planetary gears and second planetary gears are respectively arranged circumferentially on the first planetary carrier and the second planetary carrier, the first sun gear is arranged between the three groups of first planetary gears, and the second sun gear is arranged between the three groups of second planetary gears.

4. The wheel-reduction-gear-based tractor according to claim 2, characterized in that: The transmission member is configured as a spline.

5. The wheel-reduction-gear-based tractor according to claim 1, wherein: The dry brake module adopts a dry brake, which is arranged between the drive motor and the transmission module.

6. The wheel-reduction-gear-based tractor according to claim 1, wherein: The traction vehicle body has six groups of vehicle wheels, and the six groups of vehicle wheels are arranged with the dry brake module, wherein four groups of vehicle wheels are arranged with the drive system.

7. The wheel-reduction-gear-based tractor according to claim 6, characterized in that: The vehicle wheels adopt rubber-coated wheels, and the tread surfaces of the vehicle wheels are made of polyurethane material.

8. The wheel-reduction-gear-based tractor according to claim 1, characterized in that: The traction vehicle body further comprises a suspension damping component, the suspension damping component comprising a flange plate, a mounting seat and a shock absorber, the mounting seat being connected to the vehicle frame, the flange plate being connected to the vehicle wheels, and the shock absorber being connected between the flange plate and the mounting seat.

9. The wheel-reduction-gear-based tractor according to claim 1, wherein: The full load speed of the traction vehicle is 15 km / h, and the first speed is 5 km / h.

10. The wheel-reduction-gear-based tractor according to claim 1, wherein, The traction vehicle further comprises: a power supply system comprising a battery module, a high-voltage control module and a low-voltage control module connected in sequence, the high-voltage control module being electrically connected to the drive motor; a monitoring system comprising a temperature monitoring module, an open flame monitoring module and an electric leakage monitoring module, the temperature monitoring module and the open flame monitoring module being used to monitor the battery module, and the electric leakage monitoring module being used to monitor the high-voltage control module; A control system electrically connected to the drive system, the brake system, the power supply system, and the monitoring system.

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