CN104875761A - Dual-purpose pedal used for passengers to get on or off train and provided with rack - Google Patents
Dual-purpose pedal used for passengers to get on or off train and provided with rack Download PDFInfo
- Publication number
- CN104875761A CN104875761A CN201510335939.8A CN201510335939A CN104875761A CN 104875761 A CN104875761 A CN 104875761A CN 201510335939 A CN201510335939 A CN 201510335939A CN 104875761 A CN104875761 A CN 104875761A
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- China
- Prior art keywords
- circuit
- train
- stretcher
- pedal
- tooth bar
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D23/00—Construction of steps for railway vehicles
Abstract
The invention disclosed a dual-purpose pedal used for passengers to get on or off a train and provided with a rack and belongs to the technical field of auxiliary equipment for trains. According to the technical scheme, the pedal is characterized in that a foot pedal is controlled to be pushed out or retracted through meshing of a rotating shaft gear and the rack arranged at the bottom of the foot pedal, the torque of the rotating shaft gear is increased by means of a transmission, a servo motor is controlled to stop by a travel switch, transition between push-out and retraction of the foot pedal is completed through rear guide rollers, a microprocessor in a control circuit is used for determining the type of a platform according to a distance signal measured by an infrared distance measurement circuit, and further, travel of the foot pedal is controlled. The dual-purpose pedal can be simultaneously applied to a high platform and a low platform and brings convenience to the passengers when the passengers get on or off the train through the high platform and the low platform, and safety accidents are avoided; meanwhile, the efficiency of the passengers getting on or off the platform is improved, and dwell time of the train is saved to a certain extent.
Description
Technical field
The invention belongs to train technical field of auxiliary equipment, be specifically related to a kind of train with tooth bar and get on or off the bus dual-purpose pedal.
Background technology
At present, the platform of Railway station is divided into low platform and high platform two kinds, the base plate 70-80cm of the platform ground distance railway car of low platform, and the pedal of getting off for low platform is three grades of steps, the height fall of adjacent step is 25-30cm, and passenger loading is very painstaking, gets off and also very easily steps on sky.And there is the wide gap of 30cm in high platform after increasing and Railway station railway platform, each compartment of train is equipped with one piece of manual train doorway pedal, this manual train doorway pedal considers that the people of use is more, robust material must be selected to make, cause pedal quality overweight like this, cause heavy manual labor to train attendant, seem particularly inharmonious with the social status quo of high speed development.
Summary of the invention
The technical matters that the present invention solves there is provided a kind of train that simultaneously can be applicable to the band tooth bar of low platform and high platform and to get on or off the bus dual-purpose pedal, this device to be meshed the release of control pin pedal and withdrawal by shaft gear and the tooth bar be arranged at bottom stretcher, the torsional forces of shaft gear is increased by change speed gear box, the stopping of servomotor is controlled by travel switch, transition when releasing and regain stretcher has been taken turns by rear guide roll, judge platform is as which kind of platform by the microprocessor in control circuit according to the range signal that infrared distance measurement circuit records, released by control button control circui stretcher and regain, control the rotation of servomotor by full-digital servo motor driver circuit and then carry out the stroke of control pin pedal.
The present invention adopts following technical scheme for solving the problems of the technologies described above, a kind of train with tooth bar is got on or off the bus dual-purpose pedal, it is characterized in that: the car bottom relative with Train door is fixed with board slot, this board slot is near a side opening of Train door, stretcher is provided with in board slot, the end of stretcher is provided with rear guide roll wheel, the front end of stretcher is provided with the travel switch stopped for controlling servomotor, the bottom of stretcher is provided with tooth bar, the servomotor relative with stretcher is provided with in the side, front end of stretcher, this servomotor connects the change speed gear box increasing moment of torsion, the rotating shaft of change speed gear box is provided with the shaft gear be meshed with tooth bar bottom stretcher, the control panel of interior is provided with control button, the inside of control panel is provided with control circuit, this control circuit is by microprocessor, power circuit, reset circuit, crystal oscillating circuit, control button circuit, infrared distance measurement circuit and full-digital servo motor driver circuit composition, wherein microprocessor is respectively by circuit and power circuit, reset circuit, crystal oscillating circuit, control button circuit, infrared distance measurement circuit is connected with full-digital servo motor driver circuit, microprocessor as central process unit for the treatment of the signal received and send command signal, power circuit is used for providing power supply for whole control circuit, control button circuit is connected with control button by circuit, this control button circuit is used for release and the withdrawal of control pin pedal, infrared distance measurement circuit consists of connection infrared distance measurement module and A/D chip, the analog signal of infrared distance measurement module acquires distance, the analog signal about distance collected is converted to the discernible digital signal of microprocessor by A/D chip, full-digital servo motor driver circuit is connected with servomotor by circuit, for driving the forward and reverse of servomotor, and control the rotation of servomotor motor and then carry out the distance that control pin pedal stretches out.
Further restriction, described servomotor is the AC servo motor with brake function.
Further restriction, the rotation of described change speed gear box is than being 1:18-20.
Further restriction, the length of described board slot is 160-170cm, and width is 90-100cm, is highly 9-10cm.
Further restriction, the length of described stretcher is 140-150cm, and width is 70-80cm, and is provided with non-slip bumps on the footrests.
Further restriction, the rear guide roll wheel of described stretcher end is 6 groups.
Further restriction, described travel switch is the Direct Action Type travel switch with reset function.
Further restriction, described power circuit provides the power supply of the DC voltage-stabilizing 5V needed for control circuit.
The present invention can realize the double-purpose functional being simultaneously applicable to high platform and low platform, for passenger's Train on low platform and high platform is provided convenience, avoid the generation of safety misadventure, improve the efficiency of the upper Train of passenger simultaneously, saved the length of the halt of train to a certain extent.
Accompanying drawing explanation
Fig. 1 is integral structure schematic diagram of the present invention, Fig. 2 is the structural representation of stretcher in the present invention, Fig. 3 is using state figure of the present invention, Fig. 4 is control circuit module map of the present invention, Fig. 5 is the microprocessor figure of control circuit of the present invention, Fig. 6 is the reset circuit figure of control circuit of the present invention, Fig. 7 is the crystal oscillating circuit figure of control circuit of the present invention, Fig. 8 is the control button circuit diagram of control circuit of the present invention, Fig. 9 is the infrared distance measurement circuit diagram of control circuit of the present invention, and Figure 10 is the full-digital servo motor driver circuit figure of control circuit of the present invention.
Drawing illustrates: 1, board slot, 2, stretcher, 3, rear guide roll wheel, 4, travel switch, 5, tooth bar, 6, servomotor, 7, change speed gear box, 8, shaft gear.
Detailed description of the invention
Describe embodiment in detail by reference to the accompanying drawings.A kind of train with tooth bar is got on or off the bus dual-purpose pedal, the car bottom relative with Train door is fixed with board slot 1, this board slot 1 is near a side opening of Train door, stretcher 2 is provided with in board slot 1, the end of stretcher 2 is provided with rear guide roll wheel 3, the front end of stretcher 2 is provided with the travel switch 4 stopped for controlling servomotor 6, the bottom of stretcher 2 is provided with tooth bar 5, the servomotor 6 relative with stretcher 2 is provided with in the side, front end of stretcher 2, this servomotor 6 connects the change speed gear box 7 increasing moment of torsion, the rotating shaft of change speed gear box 7 is provided with the shaft gear 8 be meshed with tooth bar 5 bottom stretcher 2, the control panel of the inside in compartment is provided with control button, the inside of control panel is provided with control circuit, this control circuit is by microprocessor, power circuit, reset circuit, crystal oscillating circuit, control button circuit, infrared distance measurement circuit and full-digital servo motor driver circuit composition, wherein microprocessor is respectively by circuit and power circuit, reset circuit, crystal oscillating circuit, control button circuit, infrared distance measurement circuit is connected with full-digital servo motor driver circuit, microprocessor as central process unit for the treatment of the signal received and send command signal, power circuit is used for providing power supply for whole control circuit, control button circuit is connected with control button by circuit, this control button circuit is used for release and the withdrawal of control pin pedal 2, infrared distance measurement circuit consists of connection infrared distance measurement module and A/D chip, the analog signal of infrared distance measurement module acquires distance, the analog signal about distance collected is converted to the discernible digital signal of microprocessor by A/D chip, according to the range signal gathered, microprocessor judges platform is as which kind of platform, if when control circuit judges that platform is low platform, train attendant presses release button, servomotor 6 rotates forward, stretcher 2 is driven to stretch out forward, arrival certain position rear pedal 2 relies on the transitional function of self gravitation and rear guide roll wheel to be formed and tiltedly drapes over one's shoulders, when the front end of stretcher 2 lands, travel switch 4 cuts out servomotor 6, servomotor 6 power down locking, stretcher 2 is fixed, the hillside fields of fixing stretcher 2 is 25 °-30 °, height error problem in low platform process of construction can be adapted to, when train attendant presses withdrawal button, servomotor 6 reverses, stretcher 2 relies on the transitional function of the high pulling torque of shaft gear 8 and rear guide roll wheel 3 to regain stretcher 2.If when control circuit judges that platform is high platform, that record according to infrared distance measurement circuit with distance that is platform, and stretch out suitable distance by Microprocessor S3C44B0X servomotor 6 and then control pin pedal 2, stroke is 30-35cm.Full-digital servo motor driver circuit is connected with servomotor 6 by circuit, for driving the forward and reverse of servomotor 6, and controls the rotation of motor and then carrys out the distance that control pin pedal 2 stretches out.
The length of described board slot 1 is 160-170cm, and width is 90-100cm, and be highly 9-10cm, the material selecting intensity relatively large is made.
Described servomotor 6 is AC servo motor, controls the rotating of servomotor 6 by full-digital servo motor driver circuit, power of motor at 1-1.2kw, rotating speed 1300-1400rpm, the about 7-8Nm of moment of torsion.
The rotation ratio of described change speed gear box 7 is set to 1:18-20, improves the moment of torsion of shaft gear 8 further.
Described stretcher 2 is provided with rear guide roll wheel 3, travel switch 4 and tooth bar 5, the length of described stretcher 2 is 140-150cm, and width is 70-80cm, and weight is 60-70kg, material is iron and equality strength goods, is provided with non-slip bumps in addition on stretcher 2.
Described rear guide roll wheel 3 is fixed on the rear end of stretcher 2, has 6 groups, and the diameter of each rear guide roll wheel 3 is at 4-5cm, and width is 2.3-2.5cm, and rear guide roll wheel 3 plays the effect of transition when releasing and regain stretcher 2.
Described travel switch 4 is for having the Direct Action Type travel switch of auto-reset function, and be applicable to a-c cycle 50Hz, voltage 380V, electric current is less than 0.8A, actuating length 1.5-3.5mm, action force≤10N.
Described tooth bar 5 and the length of shaft gear 8 are 80cm, and described tooth radius is at 4-4.5cm, and described tooth bar 5 and shaft gear 8 drive stretcher 2 to release and regain by engaging each other.
Described control circuit is by microprocessor, power circuit, reset circuit, and crystal oscillating circuit, control button circuit, infrared distance measurement circuit and full-digital servo motor driver circuit form.Microprocessor in described control circuit can adopt 80C51 series monolithic as central process unit, and it is miniaturization, the microprocessor of low-power consumption, for the treatment of the signal received and send command signal.Described power circuit, for providing the 5V voltage of microprocessor, connects 40 pins of microprocessor, simultaneously microprocessor 20 pin ground connection.RST port in described reset circuit connects 9 pins of microprocessor, for the electrification reset of microprocessor.XTAL1 with XTAL2 port in described crystal oscillating circuit is connected 19 and 18 pins of microprocessor respectively, for providing basic clock signal for control circuit.P1.0 with P1.1 port in described control button circuit is connected 1 and 2 pins of microprocessor respectively, for release and the withdrawal of control pin pedal 2.P2.0, P2.1 in described infrared distance measurement circuit and P2.2 port are connected 21,22 and 23 pins of microprocessor respectively, it consists of connection the A/D chip of infrared distance measurement module, for measuring the range signal of platform, wherein said A/D chip can adopt MAX187 chip.P0.0 in described full-digital servo motor driver circuit, P0.1 with P0.2 port is connected 39 of microprocessor, 38 and 37 pins, microprocessor carrys out servomotor 6 rotate forward an angle by sending an impulse singla to P0.0 port, send an impulse singla to P0.1 port to carry out servomotor 6 and to reverse an angle, the high level of control P0.2 port and low level control rotation and the stopping of servomotor 6 simultaneously, actuator wherein in full-digital servo motor driver circuit is digit driver, required voltage is 20-50V, the angle that when driver control microprocessor sends a pulse, servomotor 6 can rotate.
Operational process of the present invention is: when train is stopped, judge platform is as which kind of platform by control circuit, if low platform, train attendant rotates forward by releasing push button control servomotor 6, shaft gear 8 engages the tooth bar 5 bottom stretcher 2, stretcher 2 is driven to stretch out, when stretcher 2 front end lands, servomotor 6 is stopped by travel switch 4, servomotor 6 locking, stretcher 2 is fixed, passenger getting on/off, when train prepares to exercise, train attendant reverses by regaining push button control servomotor 6, stretcher 2 relies on the slow transitional function of the high pulling torque of shaft gear 8 and rear guide roll wheel 3 to complete recovery.If high platform, by infrared distance measurement circuit according to the distance to platform measured, control circuit controls servomotor 6 by full-digital servo motor driver circuit and then control pin pedal 2 stretches out suitable stroke.
The program assembly language of above-mentioned micro controller system or C language compilation realize.More than show and describe groundwork of the present invention, principal character and advantage, without departing from the spirit and scope of the present invention, the present invention also has various changes and modifications, and these changes and improvements all fall into claimed scope of the present invention.
Claims (8)
1. the train with tooth bar is got on or off the bus dual-purpose pedal, it is characterized in that: the car bottom relative with Train door is fixed with board slot, this board slot is near a side opening of Train door, stretcher is provided with in board slot, the end of stretcher is provided with rear guide roll wheel, the front end of stretcher is provided with the travel switch stopped for controlling servomotor, the bottom of stretcher is provided with tooth bar, the servomotor relative with stretcher is provided with in the side, front end of stretcher, this servomotor connects the change speed gear box increasing moment of torsion, the rotating shaft of change speed gear box is provided with the shaft gear be meshed with tooth bar bottom stretcher, the control panel of interior is provided with control button, the inside of control panel is provided with control circuit, this control circuit is by microprocessor, power circuit, reset circuit, crystal oscillating circuit, control button circuit, infrared distance measurement circuit and full-digital servo motor driver circuit composition, wherein microprocessor is respectively by circuit and power circuit, reset circuit, crystal oscillating circuit, control button circuit, infrared distance measurement circuit is connected with full-digital servo motor driver circuit, microprocessor as central process unit for the treatment of the signal received and send command signal, power circuit is used for providing power supply for whole control circuit, control button circuit is connected with control button by circuit, this control button circuit is used for release and the withdrawal of control pin pedal, infrared distance measurement circuit consists of connection infrared distance measurement module and A/D chip, the analog signal of infrared distance measurement module acquires distance, the analog signal about distance collected is converted to the discernible digital signal of microprocessor by A/D chip, full-digital servo motor driver circuit is connected with servomotor by circuit, for driving the forward and reverse of servomotor, and control the rotation of servomotor motor and then carry out the distance that control pin pedal stretches out.
2. the train of band tooth bar according to claim 1 is got on or off the bus dual-purpose pedal, it is characterized in that: described servomotor is the AC servo motor with brake function.
3. the train of band tooth bar according to claim 1 is got on or off the bus dual-purpose pedal, it is characterized in that: the rotation of described change speed gear box is than being 1:18-20.
4. the train of band tooth bar according to claim 1 is got on or off the bus dual-purpose pedal, it is characterized in that: the length of described board slot is 160-170cm, and width is 90-100cm, is highly 9-10cm.
5. the train of band tooth bar according to claim 1 is got on or off the bus dual-purpose pedal, it is characterized in that: the length of described stretcher is 140-150cm, and width is 70-80cm, and is provided with non-slip bumps on the footrests.
6. the train of band tooth bar according to claim 1 is got on or off the bus dual-purpose pedal, it is characterized in that: the rear guide roll wheel of described stretcher end is 6 groups.
7. the train of band tooth bar according to claim 1 is got on or off the bus dual-purpose pedal, it is characterized in that: described travel switch is the Direct Action Type travel switch with reset function.
8. the train of band tooth bar according to claim 1 is got on or off the bus dual-purpose pedal, it is characterized in that: described power circuit provides the power supply of the DC voltage-stabilizing 5V needed for control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510335939.8A CN104875761B (en) | 2015-06-17 | 2015-06-17 | A kind of train with rack is got on or off the bus dual-purpose pedal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510335939.8A CN104875761B (en) | 2015-06-17 | 2015-06-17 | A kind of train with rack is got on or off the bus dual-purpose pedal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104875761A true CN104875761A (en) | 2015-09-02 |
| CN104875761B CN104875761B (en) | 2017-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510335939.8A Active CN104875761B (en) | 2015-06-17 | 2015-06-17 | A kind of train with rack is got on or off the bus dual-purpose pedal |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105644573A (en) * | 2016-03-11 | 2016-06-08 | 河南科技大学 | Guide device for telescopic pedal assembly, telescopic pedal assembly and vehicle |
| CN105774829A (en) * | 2016-03-11 | 2016-07-20 | 河南科技大学 | Automatic telescopic pedal assembly and vehicle using same |
| CN109367552A (en) * | 2018-09-29 | 2019-02-22 | 中车唐山机车车辆有限公司 | Rail vehicle platform compensation device and rail vehicle |
| CN110254585A (en) * | 2019-07-11 | 2019-09-20 | 常州舒安车辆有限公司 | The pedal structure of folding electric tricycle |
| CN111619591A (en) * | 2020-06-09 | 2020-09-04 | 南京康尼电子科技有限公司 | Train platform compensator control method and device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3724396A (en) * | 1971-02-18 | 1973-04-03 | Vapor Corp | Door system for high low platforms |
| US6341563B1 (en) * | 1997-06-19 | 2002-01-29 | Sensotech Ltd. | Door opening control apparatus |
| CN1418790A (en) * | 2002-12-09 | 2003-05-21 | 吴卓进 | Active foot step for getting on/off train |
| KR20040001380A (en) * | 2002-06-28 | 2004-01-07 | 원충연 | Subway safety stool system |
| US8020496B1 (en) * | 2008-03-17 | 2011-09-20 | Ignacio Maysonet | Retractable platform device for use with subway trains and associated method |
| CN204659730U (en) * | 2015-06-17 | 2015-09-23 | 河南师范大学 | A kind of train with tooth bar is got on or off the bus dual-purpose pedal |
-
2015
- 2015-06-17 CN CN201510335939.8A patent/CN104875761B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3724396A (en) * | 1971-02-18 | 1973-04-03 | Vapor Corp | Door system for high low platforms |
| US6341563B1 (en) * | 1997-06-19 | 2002-01-29 | Sensotech Ltd. | Door opening control apparatus |
| KR20040001380A (en) * | 2002-06-28 | 2004-01-07 | 원충연 | Subway safety stool system |
| CN1418790A (en) * | 2002-12-09 | 2003-05-21 | 吴卓进 | Active foot step for getting on/off train |
| US8020496B1 (en) * | 2008-03-17 | 2011-09-20 | Ignacio Maysonet | Retractable platform device for use with subway trains and associated method |
| CN204659730U (en) * | 2015-06-17 | 2015-09-23 | 河南师范大学 | A kind of train with tooth bar is got on or off the bus dual-purpose pedal |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105644573A (en) * | 2016-03-11 | 2016-06-08 | 河南科技大学 | Guide device for telescopic pedal assembly, telescopic pedal assembly and vehicle |
| CN105774829A (en) * | 2016-03-11 | 2016-07-20 | 河南科技大学 | Automatic telescopic pedal assembly and vehicle using same |
| CN108974028A (en) * | 2016-03-11 | 2018-12-11 | 河南科技大学 | A kind of guiding device and telescopic pedal component, vehicle for telescopic pedal component |
| CN109398392A (en) * | 2016-03-11 | 2019-03-01 | 河南科技大学 | A kind of automation telescopic pedal component and the vehicle using the pedal assembly |
| CN109398392B (en) * | 2016-03-11 | 2020-07-17 | 河南科技大学 | Automatic change flexible footboard subassembly and use vehicle of this footboard subassembly |
| CN109367552A (en) * | 2018-09-29 | 2019-02-22 | 中车唐山机车车辆有限公司 | Rail vehicle platform compensation device and rail vehicle |
| CN110254585A (en) * | 2019-07-11 | 2019-09-20 | 常州舒安车辆有限公司 | The pedal structure of folding electric tricycle |
| CN110254585B (en) * | 2019-07-11 | 2024-04-09 | 常州舒安车辆有限公司 | Pedal structure of folding electric bicycle |
| CN111619591A (en) * | 2020-06-09 | 2020-09-04 | 南京康尼电子科技有限公司 | Train platform compensator control method and device |
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| CN104875761B (en) | 2017-10-31 |
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