CN108146540A - A kind of electronic sub-material vehicle of light rail type - Google Patents
A kind of electronic sub-material vehicle of light rail type Download PDFInfo
- Publication number
- CN108146540A CN108146540A CN201711374798.6A CN201711374798A CN108146540A CN 108146540 A CN108146540 A CN 108146540A CN 201711374798 A CN201711374798 A CN 201711374798A CN 108146540 A CN108146540 A CN 108146540A
- Authority
- CN
- China
- Prior art keywords
- transport vehicle
- tractor
- vehicle
- light rail
- rail type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000463 material Substances 0.000 title claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 230000005611 electricity Effects 0.000 claims abstract description 7
- 230000008878 coupling Effects 0.000 claims abstract description 4
- 238000010168 coupling process Methods 0.000 claims abstract description 4
- 238000005859 coupling reaction Methods 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims description 14
- 238000007906 compression Methods 0.000 claims description 14
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 229910052744 lithium Inorganic materials 0.000 claims description 3
- 230000008961 swelling Effects 0.000 claims description 3
- 230000032258 transport Effects 0.000 description 37
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D63/00—Motor vehicles or trailers not otherwise provided for
- B62D63/06—Trailers
- B62D63/068—Trailers with more than two axles or more than four wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/24—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions
- B60D1/36—Traction couplings; Hitches; Draw-gear; Towing devices characterised by arrangements for particular functions for facilitating connection, e.g. hitch catchers, visual guide means, signalling aids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60D—VEHICLE CONNECTIONS
- B60D1/00—Traction couplings; Hitches; Draw-gear; Towing devices
- B60D1/48—Traction couplings; Hitches; Draw-gear; Towing devices characterised by the mounting
- B60D1/50—Traction couplings; Hitches; Draw-gear; Towing devices characterised by the mounting resiliently mounted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D61/00—Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern
- B62D61/02—Motor vehicles or trailers, characterised by the arrangement or number of wheels, not otherwise provided for, e.g. four wheels in diamond pattern with two road wheels in tandem on the longitudinal centre line of the vehicle
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Agricultural Machines (AREA)
Abstract
The invention discloses a kind of electronic sub-material vehicles of light rail type, including tractor and transport vehicle, the tractor includes car body, the car body lower end is equipped with driving wheel and driven wheel, the vehicle body is equipped with speed reducer, the speed reducer is connect with driving wheel by shaft coupling, the speed reducer rear end is equipped with power supply module, the car body upper end, which is equipped with, multiplies control room, the control room rear end that multiplies is equipped with electric cabinet, the electric cabinet upper end is equipped with control panel, the control panel is equipped with control button, charging hole and electricity display screen are equipped with below the control button, the car body rear is provided with transport vehicle, the transport vehicle upper end is equipped with conveyer belt, the conveyer belt front end is provided with motor, the motor is electrically connected with power supply module；The present invention improves the efficiency of sub-material by the connection mode of tractor and at least one transport vehicle, by the connection between connector quick release transport vehicle and tractor, improves stability, maintains easily.
Description
Technical field
The present invention relates to light rail conveying equipment technical field, specifically a kind of electronic sub-material vehicle of light rail type.
Background technology
Common product is packaged as carton, although and carton does not weigh, compare and take up space, common small handcart is removed every time
The quantity of fortune will not be too many, when needing shipping bulk amount carton, needs back and forth many times, more wasteful human resources；And it transports
During defeated a small amount of cargo, transported with cart is inconvenient to operate again；Being equipped with large and small type cart simultaneously in warehouse can cause to waste again.
In the prior art, a kind of cart for cartons of Patent No. CN201410641359.7, by T-shaped
Pull rod is used in combination with universal rolling wheel, manual transportation, quickly and easily cartons product, and the present invention is for cartons
Cart, it is easy to operate although simple in structure, it cannot in high volume transport, the landing of cardboard is be easy to cause by pulling manually,
The transport of voluminous line cannot be transported in time, types of transportation is single.
Invention content
The purpose of the present invention is to provide a kind of electronic sub-material vehicle of light rail type, to solve in the prior art, it is impossible to high-volume
Transport, the landing of cardboard is be easy to cause by pulling manually, the transport of voluminous line cannot be transported in time, types of transportation is single
The problem of.
To achieve the above object, the present invention provides following technical solution：
A kind of electronic sub-material vehicle of light rail type, including tractor and transport vehicle, it is characterised in that：The tractor includes vehicle
Body, the car body lower end are equipped with driving wheel and driven wheel, and the vehicle body is equipped with speed reducer, and the speed reducer is with driving
Motor car wheel is connected by shaft coupling, and the speed reducer rear end is equipped with power supply module, and the car body upper end, which is equipped with, multiplies control room, described to multiply
Control room rear end is equipped with electric cabinet, and the electric cabinet upper end is equipped with control panel, and the control panel is equipped with control button,
It is equipped with charging hole and electricity display screen below the control button, the car body rear is provided with transport vehicle, on the transport vehicle
End is equipped with conveyer belt, and the conveyer belt front end is provided with motor, and the motor is electrically connected with power supply module, and the motor leads to
The operation of electric machine controller control conveyer belt is crossed, connector is provided between the transport vehicle and tractor, the connector connects
Connect tractor and transport vehicle.
Preferably, the driving wheel and driven wheel are V-groove wheel.
Preferably, the power supply module is at least one of lead accumulator, lithium battery, super capacitance cell.
Preferably, the electric cabinet is PLC electric cabinets, the electric cabinet and power supply module, control panel and the electromechanics that slows down
Property connection.
Preferably, the control button includes forwarding button, stop button, backspace button, start button, scram button.
Preferably, the connector includes connection curved bar, and the connection curved bar is shaped to U for a straight-bar along symmetrical centre
The Ω type bars of type, the connection curved bar include the shaft bar of straight bar part and the connecting rod of U-bend part, the shaft bar peace
In the axis hole of transport vehicle one end, the connecting rod mounts boss clamping with tractor rear end, and the connector further includes
Compression spring, the compression spring is mounted on the lower end of connection curved bar, and one end of compression spring is mounted on transport vehicle, pressure
The spring other end is mounted on tractor, is connected curved bar by the pressure swelling of compression spring and is mounted the connection between boss,
And play cushioning effect.
Preferably, the transport vehicle rear end is provided with the connection boss identical with mounting boss structure.
Compared with prior art, the beneficial effects of the invention are as follows：
(1), the present invention improves the speed of sub-material by the connection mode of tractor and at least one transport vehicle, passes through driving
Tractor carrys out connection transportation vehicle so as to improve conevying efficiency；
(2), by the connection between the connection curved bar quick release transport vehicle and tractor of connector, pass through pressure bullet
Spring can improve the connective stability between tractor and transport vehicle, maintenance easy to disassemble；
(3), it is the driving wheel and driven wheel of V-groove wheel, increases tractor and the stabilization of transport vehicle transportational process,
And terrace surface is not destroyed when terrace is run, the change rail of tractor is facilitated to run, increases the working efficiency of streamline.
Description of the drawings
Fig. 1 is the front view of the present invention；
Fig. 2 is the vertical view of the present invention；
Fig. 3 is the partial enlarged view of the present invention.
In figure：1- transport vehicles；2- car bodies；3- drives wheel；4- driven wheels；5- power supply modules；6- multiplies control room；7- is automatically controlled
Case；8- control panels；9- control buttons；10- charging holes；11- electricity display screens；12- conveyer belts；13- motors；14- connections are bent
Bar；15- mounts boss；16- compression springs；17- connection boss.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig.1-2, in the embodiment of the present invention one, a kind of electronic sub-material vehicle of light rail type, including tractor and transport vehicle
1, tractor includes car body 2, and 2 lower end of car body is equipped with driving wheel 3 and driven wheel 4, car body 2 are internally provided with speed reducer, subtract
Fast machine is connect with driving wheel 3 by shaft coupling, and speed reducer provides output power for driving wheel 3, and speed reducer rear end is equipped with electricity
Source component 5, power supply module 5 provide electric power for electrical part, and 2 upper end of car body, which is equipped with, multiplies control room 6, multiply control room 6 and are conveniently operated personnel and multiply
It sits, multiplies control 6 rear end of room and electric cabinet 7 is installed, electric cabinet 7 controls the operation of machine, and 7 upper end of electric cabinet is equipped with control panel 8,
Control panel 8 is equipped with control button 9, and control button 9 is conveniently operated manipulation of the personnel to transport vehicle 1, and 9 lower section of control button is set
There are charging hole 10 and electricity display screen 11, the charging of the power supply module 5 of tractor is facilitated intuitively to react the energy of tractor simultaneously
Output, 2 rear of car body are provided with transport vehicle 1, and 1 upper end of transport vehicle is equipped with conveyer belt 12, and 12 front end of conveyer belt is provided with motor
13, motor 13 is electrically connected with power supply module 5, and conveyer belt 12 facilitates the transport of material, can control by the rotating of motor 13
The transport of different directions, conevying efficiency improve, and motor 13 controls the operation of conveyer belt 12, transport vehicle 1 by 13 controller of motor
Connector, connector connection tractor and transport vehicle 1 are provided between tractor, passes through tractor and at least one transport vehicle
1 connection mode improves the speed of sub-material, by driving tractor come connection transportation vehicle 1 so as to improve conevying efficiency；
Please refer to Fig.1-2, in the embodiment of the present invention two, it is V-groove wheel to drive wheel 3 and driven wheel 4, is V-type
The driving wheel and driven wheel of sheave increase tractor and the stabilization of transport vehicle transportational process, and when terrace is run not
Terrace surface is destroyed, the change rail of tractor is facilitated to run, increases the working efficiency of streamline, power supply module 5 is lead accumulator, lithium electricity
At least one of pond, super capacitance cell facilitate the charging of tractor to use, electric cabinet 7 be PLC electric cabinets, electric cabinet 7
It is electrically connected with power supply module 5, control panel 8 and speed reducer, control button 9 is pressed including forwarding button, stop button, retrogressing
Button, start button, scram button control speed reducer by the electric connection of forwarding button and backspace button and PLC control cabinet
Motor positive and inverse realizes moving forward and backward for tractor traction transport vehicle 1, the transport of convenience in transport vehicle.
Referring to Fig. 3, in the embodiment of the present invention three, connector includes connection curved bar 14, and connection curved bar 14 is a straight-bar
U-shaped Ω type bars are shaped to along symmetrical centre, connection curved bar 14 includes the shaft bar of straight bar part and the connection of U-bend part
Bar, shaft bar are mounted in the axis hole of 1 one end of transport vehicle, and connecting rod and the boss 15 that mounts of tractor rear end are clamped, and pass through company
Connection between the connection 14 quick release transport vehicle 1 of curved bar and tractor of fitting, connector further include compression spring 16, press
Power spring 16 is mounted on the lower end of connection curved bar 14, and one end of compression spring 16 is mounted on transport vehicle 1, and compression spring 16 is another
One end is mounted on tractor, is connected curved bar 14 by the pressure swelling of compression spring 16 and is mounted the connection between boss 15,
And cushioning effect is played, and the connective stability between tractor and transport vehicle can be improved by compression spring, maintenance easy to disassemble,
1 rear end of transport vehicle is provided with the connection boss 17 identical with mounting 15 structure of boss, facilitates the number for increasing and deleting transport vehicle 1
Amount.
It is obvious to a person skilled in the art that the present invention is not limited to the details of above-mentioned exemplary embodiment, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requirement rather than above description limit, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference numeral in claim should not be considered as to the involved claim of limitation.
Claims (7)
1. a kind of electronic sub-material vehicle of light rail type, including tractor and transport vehicle, it is characterised in that：The tractor includes car body,
The car body lower end is equipped with driving wheel and driven wheel, and the vehicle body is equipped with speed reducer, the speed reducer and driving
Wheel is connected by shaft coupling, and the speed reducer rear end is equipped with power supply module, and the car body upper end, which is equipped with, multiplies control room, described to multiply control
Room rear end is equipped with electric cabinet, and the electric cabinet upper end is equipped with control panel, and the control panel is equipped with control button, institute
It states and charging hole and electricity display screen is equipped with below control button, the car body rear is provided with transport vehicle, the transport vehicle upper end
Conveyer belt is installed, the conveyer belt front end is provided with motor, and the motor is electrically connected with power supply module, and the motor passes through
Electric machine controller controls the operation of conveyer belt, and connector, the connector connection are provided between the transport vehicle and tractor
Tractor and transport vehicle.
2. a kind of electronic sub-material vehicle of light rail type according to claim 1, it is characterised in that：The driving wheel and from motor-car
Wheel is V-groove wheel.
3. a kind of electronic sub-material vehicle of light rail type according to claim 1, it is characterised in that：The power supply module is lead electric power storage
At least one of pond, lithium battery, super capacitance cell.
4. a kind of electronic sub-material vehicle of light rail type according to claim 1, it is characterised in that：The electric cabinet is automatically controlled for PLC
Case, the electric cabinet are electrically connected with power supply module, control panel and speed reducer.
5. a kind of electronic sub-material vehicle of light rail type according to claim 1, it is characterised in that：The control button includes advancing
Button, stop button, backspace button, start button, scram button.
6. a kind of electronic sub-material vehicle of light rail type according to claim 1, it is characterised in that：It is bent that the connector includes connection
Bar, the connection curved bar are shaped to U-shaped Ω type bars along symmetrical centre for a straight-bar, and the connection curved bar includes straight bar part
Shaft bar and U-bend part connecting rod, the shaft bar be mounted on transport vehicle one end axis hole in, the connecting rod with
Tractor rear end mounts boss clamping, and the connector further includes compression spring, and the compression spring is mounted on connection curved bar
Lower end, and one end of compression spring be mounted on transport vehicle on, the compression spring other end be mounted on tractor on, pass through pressure bullet
The pressure swelling of spring connects curved bar and mounts the connection between boss, and play cushioning effect.
7. a kind of electronic sub-material vehicle of light rail type according to claim 6, it is characterised in that：The transport vehicle rear end is provided with
The connection boss identical with mounting boss structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711374798.6A CN108146540A (en) | 2017-12-19 | 2017-12-19 | A kind of electronic sub-material vehicle of light rail type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711374798.6A CN108146540A (en) | 2017-12-19 | 2017-12-19 | A kind of electronic sub-material vehicle of light rail type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108146540A true CN108146540A (en) | 2018-06-12 |
Family
ID=62467583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711374798.6A Pending CN108146540A (en) | 2017-12-19 | 2017-12-19 | A kind of electronic sub-material vehicle of light rail type |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108146540A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110329059A (en) * | 2019-06-03 | 2019-10-15 | 南京航空航天大学 | A kind of detachable Rhombic electric vehicle |
| CN110606143A (en) * | 2019-10-10 | 2019-12-24 | 北京特种机械研究所 | Rigid connection system for three omnidirectional mobile platforms |
| CN111907618A (en) * | 2020-08-25 | 2020-11-10 | 张梅 | Unmanned logistics transport vehicle with expandable storage space |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT139494B (en) * | 1934-01-18 | 1934-11-26 | Dolffs & Helle V | Spring swing board (trampoline) for gymnastics purposes. |
| CN2449976Y (en) * | 2000-11-13 | 2001-09-26 | 潘永森 | Traction rod for motor vehicle |
| CN102092336A (en) * | 2010-12-31 | 2011-06-15 | 蒋恩泉 | Elastic adapter ring |
| CN201941753U (en) * | 2011-03-18 | 2011-08-24 | 芜湖伯特利汽车安全系统有限公司 | Mechanical vacuum booster |
| CN102490727A (en) * | 2011-12-06 | 2012-06-13 | 华南农业大学 | Electric mountain orchard single-rail transporting machine |
| CN103434351A (en) * | 2013-08-20 | 2013-12-11 | 张晓荣 | Spring tow hook |
| CN203410355U (en) * | 2013-06-06 | 2014-01-29 | 睿力恒一物流技术(湖北)有限公司 | Device for bundling and reinforcing goods in transportation |
| CN203543550U (en) * | 2013-10-21 | 2014-04-16 | 安徽江淮汽车股份有限公司 | Truck tow hook device |
| CN206255099U (en) * | 2016-12-02 | 2017-06-16 | 上海隽能自动化技术有限公司 | A kind of unmanned traction transport car |
| CN207843110U (en) * | 2017-12-19 | 2018-09-11 | 昆山东方同创自动化设备有限公司 | A kind of electronic sub-material vehicle of light rail type |
-
2017
- 2017-12-19 CN CN201711374798.6A patent/CN108146540A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT139494B (en) * | 1934-01-18 | 1934-11-26 | Dolffs & Helle V | Spring swing board (trampoline) for gymnastics purposes. |
| CN2449976Y (en) * | 2000-11-13 | 2001-09-26 | 潘永森 | Traction rod for motor vehicle |
| CN102092336A (en) * | 2010-12-31 | 2011-06-15 | 蒋恩泉 | Elastic adapter ring |
| CN201941753U (en) * | 2011-03-18 | 2011-08-24 | 芜湖伯特利汽车安全系统有限公司 | Mechanical vacuum booster |
| CN102490727A (en) * | 2011-12-06 | 2012-06-13 | 华南农业大学 | Electric mountain orchard single-rail transporting machine |
| CN203410355U (en) * | 2013-06-06 | 2014-01-29 | 睿力恒一物流技术(湖北)有限公司 | Device for bundling and reinforcing goods in transportation |
| CN103434351A (en) * | 2013-08-20 | 2013-12-11 | 张晓荣 | Spring tow hook |
| CN203543550U (en) * | 2013-10-21 | 2014-04-16 | 安徽江淮汽车股份有限公司 | Truck tow hook device |
| CN206255099U (en) * | 2016-12-02 | 2017-06-16 | 上海隽能自动化技术有限公司 | A kind of unmanned traction transport car |
| CN207843110U (en) * | 2017-12-19 | 2018-09-11 | 昆山东方同创自动化设备有限公司 | A kind of electronic sub-material vehicle of light rail type |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110329059A (en) * | 2019-06-03 | 2019-10-15 | 南京航空航天大学 | A kind of detachable Rhombic electric vehicle |
| CN110606143A (en) * | 2019-10-10 | 2019-12-24 | 北京特种机械研究所 | Rigid connection system for three omnidirectional mobile platforms |
| CN110606143B (en) * | 2019-10-10 | 2020-08-25 | 北京特种机械研究所 | Rigid connection system for three omnidirectional mobile platforms |
| CN111907618A (en) * | 2020-08-25 | 2020-11-10 | 张梅 | Unmanned logistics transport vehicle with expandable storage space |
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