CN105776076A - Device for automatically adjusting speed limiting and braking properties during forward movement of mast of forklift truck - Google Patents
Device for automatically adjusting speed limiting and braking properties during forward movement of mast of forklift truck Download PDFInfo
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- CN105776076A CN105776076A CN201410812725.0A CN201410812725A CN105776076A CN 105776076 A CN105776076 A CN 105776076A CN 201410812725 A CN201410812725 A CN 201410812725A CN 105776076 A CN105776076 A CN 105776076A
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- inductance sensor
- controller
- door frame
- contactless inductance
- contactless
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Abstract
The invention discloses a device for automatically adjusting speed limiting and braking properties during forward movement of a mast of a forklift truck. The device comprises a power supply, a first non-contact type inductive sensor, a second non-contact type inductive sensor, a sensing metal plate and a controller, wherein the controller can control running speed of the forklift truck and magnitude of braking force; the power supply, the first non-contact type inductive sensor and the second non-contact inductive sensor are electrically connected with the controller respectively; through the first non-contact type inductive sensor and the second non-contact type inductive sensor, a sensing signal is generated and transmitted to the controller when the mast of the forklift truck enters the sensing metal plate, and disappears when the mast of the forklift truck leaves away from the sensing metal plate; the maximum running speed and the maximum braking force, which are reduced to be preset values, of the forklift truck are controlled on the basis of the sensing signal receiving state of the controller. Whether the mast of the forklift truck moves forwards or not can be judged, the problem that braking distance is long or wheels are locked during high-speed running of the forklift truck is solved, and the circumstance that the forklift truck deflects and is out of control due to forward movement of the mast is avoided.
Description
Technical field
The present invention relates to speed limit when a kind of forklift door frame moves forward and braking ability self-checking device.
Background technology
Contactless inductance type transducer is to utilize electromagnetic induction the such as displacement of tested physical quantity, pressure, flow, vibration etc. converts the electrodynamic capacity of coil and the change of mutual inductance to, again by the variable quantity output that circuit conversion is voltage or electric current, realizing the non electrical quantity conversion to electricity, voltage that its sensing produces or size of current are big and diminish along with the change of distance of reaction.
Door frame reach truck refers to that during operation, door frame drives pallet fork forward moving, and outside reaching front-wheel, fork takes or put down goods, and during walking, pallet fork band goods is regained, and makes center of gravity of goods in supporting surface.Door frame reach truck has two supporting legs protracted, and supporting leg is higher, and there are two wheels supporting leg front end, and the effect of supporting leg is to increase supporting surface to guarantee the fork truck stability when load, and door frame can move along the track of an inboard leg with whole lifting mechanism.
Owing to the ad hoc structure of door frame reach truck makes fork truck have the structure being similar to lever, therefore when door frame moves forward, the overall center of gravity reach of fork truck, driving wheel (trailing wheel) wheel load is made to reduce, but torque that during low speed, the driving wheel of fork truck is subject to is big, but can not get bigger adhesive force, therefore easily skid.Furthermore, when wheel load is little, braking ability reduces, and when particularly running at high speed, occurs that braking distance is elongated, or causes that the danger that route sideslip is even out of control occurs in wheel locking during brake.
Given this, the present inventor develops speed limit when a kind of forklift door frame moves forward and braking ability self-checking device specially, by judging whether forklift door frame is in front shifting state, the brake force of maximum travel speed and brake is changed thereby through the controller on fork truck, thus solving the problems referred to above, this case thus produces.
Summary of the invention
A kind of forklift door frame provided by the invention reach time speed limit and braking ability self-checking device, main purpose is in that, it can judge whether forklift door frame is in front shifting state, solve the problem of braking distance length or wheel locking when fork truck is run at high speed, moreover it is possible to prevent fork truck from sideslip occurring and out of control because of door frame reach.
To achieve these goals, technical scheme is as follows:
The speed limit during reach of a kind of forklift door frame and braking ability self-checking device, including power supply, the first contactless inductance sensor, the second contactless inductance sensor, sensing metallic plate and can control fork truck travel speed and the controller of brake force size；Power supply, the first contactless inductance sensor, the second contactless inductance sensor electrically connect with controller respectively；Sensing metallic plate is strip, and is fixed on the rear end of supporting leg along the direction of reach truck supporting leg；First contactless inductance sensor and the second contactless inductance sensor are one in front and one in back arranged along the length direction of metal tablet and are arranged on forklift door frame；First contactless inductance sensor and the second contactless inductance sensor produce induced signal and send to controller when entering sensing metallic plate, and lose induction when leaving sensing metallic plate signal；When controller receives one or is not received by induced signal, controller controls the maximum travel speed of fork truck and is reduced to maximum travel speed corresponding to number that is pre-set and that receive induced signal and maximum braking force with brake force.
Described controller is also associated with display, when controller receives one or is not received by induced signal, display shows the prompting of Testudinis speed and fork truck are by the information of speed limit.
Between described first contactless inductance sensor and the second contactless inductance sensor and sensing metallic plate, there is identical gap length.
Described sensing metallic plate is horizontally fixed on the lower section of supporting leg rear end, and the first contactless inductance sensor and the second contactless inductance sensor are arranged on door frame and are in the surface of sensing metallic plate.
Described forklift door frame is provided with mounting bracket, and the first contactless inductance sensor and the second contactless inductance sensor are arranged in this mounting bracket.
Disconnect when described controller and the first contactless inductance sensor 2 electrically connect, or when the signal that detects of two contactless inductance sensors is different from the signal intensity recorded in advance, display shows miscue information.
After adopting such scheme, the main purpose of the present invention is: by arranging sensing metallic plate in the rear end of supporting leg, during to determine that only door frame moves to supporting leg rear end, contactless inductance sensor just can sense that sensing metallic plate produces induced signal, by two contactless inductance sensors that front and back are arranged, and the induced signal number that controller receives, so that it is determined that fork truck is in three kinds of states of reach completely, half reach and retraction；Contactless inductance sensor is connected with the controller controlling fork truck travel speed and brake force, maximum travel speed and the maximum braking force of fork truck when door frame is in these three state is controlled by controller, by reducing maximum travel speed thus reducing braking distance, by reducing brake force thus avoiding wheel that the danger that route sideslip is even out of control is occurred by locking.
Testudinis speed when secondary objective is by moving forward door frame over the display is pointed out and is shown over the display by the information of speed limit, so that driver finds in time, thus avoiding door frame to be in driving fork truck during reach, effectively prevent the situation that driving wheel skids.
Accompanying drawing explanation
Fig. 1 is the block diagram of embodiment of the present invention primary structure；
Fig. 2 is the three-dimensional structure diagram of the embodiment of the present invention；
Fig. 3 is embodiment of the present invention door frame axonometric chart when moving forward completely；
Fig. 4 is axonometric chart during half reach of embodiment of the present invention door frame；
Fig. 5 is axonometric chart during embodiment of the present invention door frame retraction.
Label declaration
Power supply 1, the first contactless inductance sensor 2, the second contactless inductance sensor 3, sense metallic plate 4, controller 5, supporting leg 6, rear end 61, door frame 7, mounting bracket 71, display 8.
Detailed description of the invention
As shown in Figure 1-2, it is a kind of forklift door frame 7 that the present invention discloses speed limit when moving forward and braking ability self-checking device, including power supply 1, first contactless inductance sensor the 2, second contactless inductance sensor 3, sensing metallic plate 4 and the controller 5 that fork truck travel speed and brake force can be controlled；Power supply 1, first contactless inductance sensor the 2, second contactless inductance sensor 3 electrically connects with controller 5 respectively；Sensing metallic plate 4 is in strip, and along the direction of reach truck supporting leg 6, is fixed on the rear end 61 of supporting leg 6；First contactless inductance sensor 2 and the second contactless inductance sensor 3 are one in front and one in back arranged along the length direction of metal tablet and are arranged on forklift door frame 7；First contactless inductance sensor 2 and the second contactless inductance sensor 3 produce induced signal when entering sensing metallic plate 4, and send induced signal to controller 5, and then lose induction signal when leaving sensing metallic plate 4；When controller 5 receives one or is not received by induced signal, controller 5 controls the maximum travel speed of fork truck and is reduced to maximum travel speed corresponding to number that is pre-set and that receive induced signal and maximum braking force with brake force.
By arranging sensing metallic plate 4 in the rear end 61 of supporting leg 6, during to determine that only door frame 7 moves to supporting leg 6 rear end 61, contactless inductance sensor just can sense that sensing metallic plate 4 produces induced signal, by two contactless inductance sensors that front and back are arranged, and the induced signal number that controller 5 receives, so that it is determined that fork truck is in three kinds of states of reach completely, half reach and retraction；Contactless inductance sensor is connected with the controller 5 controlling fork truck travel speed and brake force, maximum travel speed and the maximum braking force of fork truck when door frame 7 is in these three state is controlled by controller 5, by reducing maximum travel speed thus reducing braking distance, by reducing brake force thus avoiding wheel that the danger that route sideslip is even out of control is occurred by locking.
Controller 5 is also associated with display 8, when controller 5 receives only one or is not received by induced signal, display 8 shows the prompting of Testudinis speed and fork truck are by the information of speed limit.Testudinis speed during by being moved forward by door frame 7 on the display 8 is pointed out and is shown on the display 8 by the information of speed limit, so that driver finds in time, thus avoiding door frame 7 to start and driving fork truck when being in reach, effectively prevent the generation of driving wheel slippery conditions, if and must when door frame 7 moves forward driving fork truck, driver also can point out according to the Testudinis speed of display 8, enhances your vigilance in motion.
Controller 5 of the present invention only just will not send the prompting of Testudinis speed when receiving two signals, and only when the first contactless inductance sensor 2 lost efficacy, namely controller 5 detects and electrically connects disconnection with the first contactless inductance sensor 2, or the rigging position of two contactless inductance sensors not to or when loosening occur in two contactless inductance sensors, cause when the signal detected is different from the signal intensity recorded in advance, just can send miscue information (error code) on the display 8, it is easy to driver and finds the abnormal conditions of contactless inductance sensor, such as: when door frame 7 is substantially regained by driver, display 8 also showing, Testudinis speed is pointed out and points out error code, now can determine whether that contactless inductance sensor occurs in that exception, maintenance and inspection need to be carried out.
For security consideration, when two sensors damage simultaneously (two sensor all no signals feedbacks), controller judges that fork truck is constantly in door frame reach position, and fork truck will be constantly in speed limit state and use.
Wherein between the first contactless inductance sensor 2 and the second contactless inductance sensor 3 and sensing metallic plate 4, there is identical gap length, so ensure that the induced signal size of the two is identical, add interchangeability of parts, it is easy to maintenance, during design, can specifically set the size in this gap according to the distance of sensing required between contactless inductance sensor and sensing metallic plate 4.
Sensing metallic plate 4 is horizontally fixed on the lower section of supporting leg 6 rear end, and the first contactless inductance sensor 2 and the second contactless inductance sensor 3 are then horizontally arranged on door frame 7 and are in the surface of sensing metallic plate 4.Sensing metallic plate 4 is arranged on the lower section of supporting leg 6 be prevented from sensing metallic plate 4 and encountered when fork truck works and damage.
Wherein forklift door frame 7 is provided with mounting bracket 71 also by bolt, and the first contactless inductance sensor 2 and the second contactless inductance sensor 3 are arranged in this mounting bracket 71, by removable mounting means, it is simple to the adjustment of maintenance and sensor.
The controller 5 with above-mentioned functions is prior art, it is possible to directly obtain from market.
These are only presently preferred embodiments of the present invention, not the restriction to protection scope of the present invention.All equivalent variations done according to the mentality of designing of this case, each fall within the protection domain of this case.
Claims (6)
1. speed limit during forklift door frame reach and braking ability self-checking device, it is characterised in that: include power supply, the first contactless inductance sensor, the second contactless inductance sensor, sensing metallic plate and fork truck travel speed and the controller of brake force size can be controlled；Power supply, the first contactless inductance sensor, the second contactless inductance sensor electrically connect with controller respectively；Sensing metallic plate is strip, and is fixed on the rear end of supporting leg along the direction of reach truck supporting leg；First contactless inductance sensor and the second contactless inductance sensor are one in front and one in back arranged along the length direction of metal tablet and are arranged on forklift door frame；First contactless inductance sensor and the second contactless inductance sensor produce induced signal and send to controller when entering sensing metallic plate, and lose induction when leaving sensing metallic plate signal；When controller receives one or is not received by induced signal, controller controls the maximum travel speed of fork truck and is reduced to maximum travel speed corresponding to number that is pre-set and that receive induced signal and maximum braking force with brake force.
2. a kind of forklift door frame as claimed in claim 1 reach time speed limit and braking ability self-checking device, it is characterized in that: described controller is also associated with display, when controller receives one or is not received by induced signal, display showing, the prompting of Testudinis speed and fork truck are by the information of speed limit.
3. speed limit during a kind of forklift door frame as claimed in claim 1 or 2 reach and braking ability self-checking device, it is characterised in that: between described first contactless inductance sensor and the second contactless inductance sensor and sensing metallic plate, there is identical gap length.
4. a kind of forklift door frame as claimed in claim 1 or 2 reach time speed limit and braking ability self-checking device, it is characterized in that: described sensing metallic plate is horizontally fixed on the lower section of supporting leg rear end, the first contactless inductance sensor and the second contactless inductance sensor are arranged on door frame and are in the surface of sensing metallic plate.
5. a kind of forklift door frame as claimed in claim 1 or 2 reach time speed limit and braking ability self-checking device, it is characterized in that: described forklift door frame is provided with mounting bracket, the first contactless inductance sensor and the second contactless inductance sensor are arranged in this mounting bracket.
6. a kind of forklift door frame as claimed in claim 2 reach time speed limit and braking ability self-checking device, it is characterized in that: disconnect when controller and the first contactless inductance sensor 2 electrically connect, or when signal that two contactless inductance sensors detect is different from the signal intensity recorded in advance, display shows miscue information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410812725.0A CN105776076B (en) | 2014-12-24 | 2014-12-24 | Speed limit and braking ability self-checking device during a kind of forklift door frame Forward |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410812725.0A CN105776076B (en) | 2014-12-24 | 2014-12-24 | Speed limit and braking ability self-checking device during a kind of forklift door frame Forward |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105776076A true CN105776076A (en) | 2016-07-20 |
| CN105776076B CN105776076B (en) | 2018-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410812725.0A Active CN105776076B (en) | 2014-12-24 | 2014-12-24 | Speed limit and braking ability self-checking device during a kind of forklift door frame Forward |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11240700A (en) * | 1998-02-25 | 1999-09-07 | Toyota Autom Loom Works Ltd | Cargo collapse preventing device for industrial vehicle, and industrial vehicle |
| JP2001151494A (en) * | 1999-09-13 | 2001-06-05 | Toyota Autom Loom Works Ltd | Reach type forklift |
| JP2001226096A (en) * | 2000-02-15 | 2001-08-21 | Komatsu Forklift Co Ltd | Overturning alarm device and safety device against overturning for industrial vehicle |
| CN102431936A (en) * | 2011-12-19 | 2012-05-02 | 苏州先锋物流装备科技有限公司 | Piling car with limiting function |
| CN104045025A (en) * | 2013-03-15 | 2014-09-17 | 雷蒙德股份有限公司 | Systems and methods for sensor controlled reach carriage |
| CN204549961U (en) * | 2014-12-24 | 2015-08-12 | 林德（中国）叉车有限公司 | Speed limit during a kind of forklift door frame reach and deceleration and stopping performance self-checking device |
-
2014
- 2014-12-24 CN CN201410812725.0A patent/CN105776076B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11240700A (en) * | 1998-02-25 | 1999-09-07 | Toyota Autom Loom Works Ltd | Cargo collapse preventing device for industrial vehicle, and industrial vehicle |
| JP2001151494A (en) * | 1999-09-13 | 2001-06-05 | Toyota Autom Loom Works Ltd | Reach type forklift |
| JP2001226096A (en) * | 2000-02-15 | 2001-08-21 | Komatsu Forklift Co Ltd | Overturning alarm device and safety device against overturning for industrial vehicle |
| CN102431936A (en) * | 2011-12-19 | 2012-05-02 | 苏州先锋物流装备科技有限公司 | Piling car with limiting function |
| CN104045025A (en) * | 2013-03-15 | 2014-09-17 | 雷蒙德股份有限公司 | Systems and methods for sensor controlled reach carriage |
| CN204549961U (en) * | 2014-12-24 | 2015-08-12 | 林德（中国）叉车有限公司 | Speed limit during a kind of forklift door frame reach and deceleration and stopping performance self-checking device |
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| Publication number | Publication date |
|---|---|
| CN105776076B (en) | 2018-06-05 |
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