CN113514256A - Multifunctional pedal fatigue performance test bench and locking method thereof - Google Patents
Multifunctional pedal fatigue performance test bench and locking method thereof Download PDFInfo
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- CN113514256A CN113514256A CN202110667626.8A CN202110667626A CN113514256A CN 113514256 A CN113514256 A CN 113514256A CN 202110667626 A CN202110667626 A CN 202110667626A CN 113514256 A CN113514256 A CN 113514256A
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- 238000000034 method Methods 0.000 title claims abstract description 15
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- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000007306 turnover Effects 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 3
- 238000009661 fatigue test Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 235000013372 meat Nutrition 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a multifunctional pedal fatigue performance test bench and a locking method thereof, aiming at solving the defect that the existing forklift pedal is lack of detection on electrical performance. The invention comprises a housing; the positioning table is used for positioning the pedal; a connecting rod; a driver, the connecting rod drives the driver; the pressure sensor is adjustably connected to the connecting rod; a voltage sensor electrically connected to the pedal under test; a switchboard; the connecting rod swings and enables the pressure sensor to abut against the pedal, and the switchboard receives signals of the pressure sensor and the voltage sensor. In the process of detecting the fatigue degree, the mechanical structure is detected, and the electrical performance is monitored, so that the fatigue degree detection method is more comprehensive.
Description
Technical Field
The invention relates to the field of acceleration tests of forklifts, in particular to a multifunctional pedal fatigue performance test board and a locking method thereof.
Background
The good or bad of fork truck motion performance is closely related with fork truck accelerator pedal's performance, and accelerator pedal frequently uses on fork truck, if fork truck accelerator pedal unqualified very easily the failure condition appears in the in-process of traveling, harms car owner's personal and property safety easily, so is essential to accelerator pedal's test. Most of the existing pedal test devices are only tests and endurance tests for structural strength, but lack a fatigue test device for monitoring pedal force and signals in real time, cannot monitor the whole test process of the pedal in real time well, and cannot visually know the damage form and failure state of the pedal. The accelerator test bench commonly used in the market at present is mainly made according to the automobile standard. Therefore, how to provide a multifunctional endurance test device for an accelerator pedal of a forklift to detect the related performance of the accelerator pedal is a technical problem which needs to be solved by those skilled in the art at present.
Chinese patent publication No. CN205785840U, the name is fork truck service brake test bench, and this application discloses a fork truck service brake test bench, including outside rack, the rack comprises switch board, sensor, chest expander, electric cylinder, load spring, service brake frock clamp, outer frame and base, and the lower part in outer frame is installed to the platform, and the switch board constitutes test system as control center and sensor, chest expander, electric cylinder, load spring, service brake frock clamp, installs corresponding test station on the platform. The device only pays attention to the durability of a mechanical structure, and for the pedal with the working purpose of outputting a corresponding signal, the device does not pay attention to the output voltage change of the pedal in the test process and after the test is finished, so that detection omission is generated, and the defect of incomplete detection exists.
Disclosure of Invention
The invention overcomes the defect that the existing forklift pedal is lack of detection on electrical performance, and provides a multifunctional pedal fatigue performance test bench and a locking method thereof.
In order to solve the technical problems, the invention adopts the following technical scheme:
a multifunctional pedal fatigue performance test bench comprises
Shell body
The positioning table is used for positioning the pedal;
a connecting rod;
a driver, the connecting rod drives the driver;
the pressure sensor is adjustably connected to the connecting rod;
a voltage sensor electrically connected to the pedal under test;
a switchboard;
the connecting rod swings and enables the pressure sensor to abut against the pedal, and the switchboard receives signals of the pressure sensor and the voltage sensor.
The device detects the fatigue degree by pressing the pressure sensor at the movable end of the pedal. During detection, the signal of the pressure sensor and the voltage signal output by the pedal are output to the computer. The driver is a three-phase stepping motor, the driver is controlled by a PLC (programmable logic controller), the rotating speed and the stroke of the motor can be controlled, and the swinging of the connecting rod simulates the motion of a human foot. The information is collected to a calculator to generate a corresponding curve, the synchronous relation between the stroke and the voltage can be obtained after the fatigue test, whether the output signal of the pedal keeps linear or not is detected, and the output signal keeps before the test. The structure can detect whether the stroke and the pressure are normally expressed or not and whether the relation between each stroke and the voltage is consistent or not in the front and back after the fatigue degree test, and whether the foot feeling is consistent or not, whether the foot feeling is loosened or not and whether the foot feeling is changed into meat or not can be analyzed through the real-time stress curve of the pedal whether the pedal is damaged or not, and the damage form and the failure state of the pedal can be known accordingly.
Because the driver is controlled by the PLC, the testing stroke and the force of the pedal can be adjusted. A counter coupled to the drive or linkage records the number of trials of the pedal.
Preferably, the connecting rod is provided with a rotating end and a free end, and the rotating end is coaxial with a hinge point of the pedal. In order to simulate the motion of human feet, the hinge point of the rotating shaft of the connecting rod and the pedal is coaxial, so that the pressure direction of the voltage sensor is always in the tangential direction of the rotating path of the pedal, the stress direction of the pedal is ensured to be vertical to the pedal surface, and the actual stress condition of the pedal can be simulated.
Preferably, the connecting rod is provided with a long hole arranged along the length direction, the pressure sensor is detachably connected to the connecting rod through a fastener, and the detection direction of the pressure sensor faces the pedal and is arranged along the length direction of the connecting rod. The adjustable in the foregoing means that the pressure sensor can be located at different length positions of the connecting rod, so as to simulate the situation that pedals with different sizes are arranged on the pedal, and the detection end of the pressure sensor is always opposite to the pedal due to the fact that the rotation end is coaxial with the hinge point of the pedal in the foregoing. The structure can avoid that the component force in other directions cannot be counted in the pressure sensor to cause that the real situation cannot be really measured.
Preferably, the switchboard is electrically connected to the driver. The switchboard is electrically connected with the driver, controls the driver to output the rotation of the appointed times and the travel of the appointed depth, and summarizes the corresponding data, the voltage and the pressure.
Preferably, the positioning table is connected to the shell in a lifting mode, a positioner is arranged at the rotating end of the connecting rod, and light emitted by the positioner forms light spots on the pedal to assist the pedal in positioning. For the above-mentioned "the pivot end is coaxial with the hinge point of the pedal", the light is observed by eyes to bring certain errors, and here, a positioner capable of emitting positioning laser is arranged, and the alignment of the positioner with a specific position on the pedal indicates that the positioning of the pedal in the length direction is completed.
As preferred, the location platform includes fixed plate and locker, and the locker goes up and down to be connected on the casing, and the locker includes realizes the locker casing of going up and down and fixes a position two hasps of footboard left and right sides respectively through the riser, and the hasp is articulated to be connected on the casing, is equipped with the voussoir on the hasp, and voussoir butt fixed plate makes the hasp upset, and the one end sliding connection that the voussoir was kept away from to the hasp is in the guide rail of arranging along the horizontal direction, the guide rail is equipped with the elastic component along vertical slip in the locker casing between the top of guide rail and locker casing.
The structure is used for realizing the second purpose, and how to position the pedals with different sizes and models. The shapes of hole sites of pedals with different models are different, and the outlines of the hole sites are different, so that a specific positioning device is difficult to position. Because the position of the pedal has a certain precision requirement, the matching of operations required for fixing after positioning is complex, more labor is required for assembly, and the pedal is easy to slide during installation, so that the pedal needs to be repositioned. This structure has adopted the mode location footboard of automatic locking. The height of the fixing plate is adjustable, and the fixing plate corresponds to pedals with different hinge point heights. First, the pedal is positioned on the fixing plate. The locker housing is then lifted by the lifter. After the wedge block touches the fixed plate, the wedge block is turned over due to the shape of the wedge block, the wedge block is outward, the other end of the wedge block is turned inward, and the wedge block is upward while the wedge block is inward and drives the guide rail connected with the wedge block in a sliding mode to overcome the elastic piece to move upward. When the wedge block is not in contact with the fixed plate, the wedge block is reset under the action of the elastic piece, the wedge block rotates reversely, the guide rail moves downwards, and the wedge block is buckled with the pedal to complete positioning. The locker shell is provided with a vertical guide groove, and the guide rail is provided with a guide inserting sheet matched with the guide groove. Because the voussoir is arranged in the left and right sides of footboard, and the two simultaneous movement can not produce extra effort to the footboard, can not make the footboard take place the skew, and this structure can one-man operation, removes from and needs many people complex loaded down with trivial details.
Preferably, the top of the locker shell corresponding to the movable space of the guide rail is provided with a contact which is electrically connected with the lifter, and the guide rail triggers the contact to control the state of the lifter.
The device adopts automatic control, after the wedge block reaches the stroke limit, the guide rail moves to the limit position in the locker shell, the contact is also arranged at the corresponding position, and when the position is reached, the fact that the wedge block is in place is indicated, and the lifter does not need to move continuously. The structure is suitable for pedals with different hinge point heights, accurate calculation from a zero-position rising position is omitted, shutdown can be controlled through a contact automatically, and automatic positioning is achieved.
Preferably, the top of the wedge block is provided with a handle block. When the test is completed and the pedal needs to be detached from the locker, the handle block can be shifted outwards to realize the release of the limit.
A locking method of a multifunctional pedal fatigue performance test bench comprises the steps as described above, wherein the locking step comprises the following steps:
(1) controlling the locker shell to be in a zero position;
(2) placing the pedal on the fixing plate;
(3) controlling the locker shell to ascend;
(4) the lock catch is abutted against the fixed plate to be overturned;
(5) the guide rail rises to trigger the contact;
(6) the contact is separated from the guide rail;
(7) the contact controls the lifter to stop;
the step of releasing the pedal includes:
(1) controlling the lock catch to overturn to the travel limit and maintaining the action X time;
(2) triggering the lifter by the guide rail corresponding to the time of X;
(3) the lifter receives the signal, and the locker shell is reset to the zero position.
Preferably, X is 5 seconds.
The steps are simple, and the design purpose of positioning by one person can be realized.
Compared with the prior art, the invention has the beneficial effects that: (1) in the process of detecting the fatigue degree, the mechanical structure and the electrical performance are monitored, so that the fatigue degree detection is more comprehensive; (2) the rotating shaft of the connecting rod is coaxial with the hinged shaft of the pedal, so that the stress direction of the pedal is vertical to the pedal surface, and the actual stress condition of the pedal can be simulated; (3) the locker automatically locks the pedal, so that the pedal is accurately positioned, and the operation by a single person is possible.
Drawings
FIG. 1 is a schematic view of the present invention;
FIG. 2 is a schematic view of the load binder of the present invention;
in the figure:
the device comprises a shell 1, a connecting rod 2, a pressure sensor 3, a voltage sensor 4, a switchboard 5, a rotating end 6, a free end 7, a pedal 8, a long hole 9, a positioner 10, a fixing plate 11, a locker shell 12, a lock catch 13, a wedge block 14, a guide rail 15, an elastic piece 16, a guide insert 17, a guide groove 18, a contact 19 and a handle block 20.
Detailed Description
The present disclosure is further described with reference to the following drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
Example 1:
a multifunctional pedal 8 fatigue performance test bench, as shown in figure 1, comprises
A positioning table, a positioning pedal 8. The positioning table is connected to the shell 1 in a lifting mode, a positioner 10 is arranged on the rotating end 6 of the connecting rod 2, and light emitted by the positioner 10 forms a light spot on the pedal 8 to assist the positioning of the pedal 8. With the aforementioned "pivot point 6 is coaxial with the pivot point of the step 8", some error is caused by visual inspection, and here, a locator 10 capable of emitting a positioning laser is provided, and the alignment of the locator 10 with a specific position on the step 8 indicates that the positioning of the step 8 in the length direction is completed.
The driver, link 2 drives the driver.
The adjustable pressure sensor 3 of connecting on connecting rod 2 is equipped with slot hole 9 along length direction arrangement on connecting rod 2, and pressure sensor 3 can dismantle through the fastener and connect on connecting rod 2, and pressure sensor 3's detection direction is towards footboard 8 and arranges mutually with the length direction method of connecting rod 2. The adjustable in the foregoing means that the pressure sensor 3 can be located at different length positions of the connecting rod 2, simulating the situation that pedals with different sizes are placed on the pedal 8, and the detection end of the pressure sensor 3 always faces the pedal 8 due to the fact that the rotation end 6 is coaxial with the hinge point of the pedal 8 in the foregoing. The structure can avoid that other direction component forces cannot be counted in the pressure sensor 3 to cause that the real situation cannot be really measured.
And a voltage sensor 4 electrically connected to the pedal 8 under test.
A switchboard 5;
the connecting rod 2 swings and enables the pressure sensor 3 to abut against the pedal 8, and the switchboard 5 receives signals of the pressure sensor 3 and the voltage sensor 4; the switchboard 5 is electrically connected to the driver. The switchboard 5 is electrically connected with a driver, controls the driver to output the rotation of the appointed times and the travel of the appointed depth, and summarizes the corresponding data with the voltage and the pressure. .
The pedal 8 during testing is electrically connected with a power supply port, and the output end of the pedal 8 is connected with a voltmeter. The pressure sensor 3 is electrically connected with a pressure gauge, and the pressure gauge and the voltmeter are connected with the switchboard 5 through a digital quantity transmitter.
The fatigue degree of the device is detected by pressing the pressure sensor 3 on the movable end of the pedal 8. During detection, the signal of the pressure sensor 3 and the voltage signal output by the pedal 8 are output to the main unit 5, i.e. the computer. The driver is a three-phase stepping motor, the driver is controlled by a PLC (programmable logic controller), the rotating speed and the stroke of the motor can be controlled, and the connecting rod 2 swings to imitate the motion of a human foot. The information is collected to a calculator to generate a corresponding curve, the synchronous relation between the stroke and the voltage can be obtained after the fatigue test, whether the output signal of the pedal 8 keeps linearity or not is detected, and the output signal keeps before the test. The structure can detect whether the stroke and the pressure are normally expressed or not after the fatigue test, whether the relation between each stroke and the voltage is consistent or not in the front and back, whether the foot feeling is consistent or not, whether the foot feeling is loosened or not and whether the foot feeling is changed into meat or not can be reflected, whether the pedal 8 is damaged or not can be analyzed through the real-time stress curve of the pedal 8, and the damage form and the failure state of the pedal 8 can be known accordingly.
Because the driver is controlled by PLC, can realize multiple running state, can be applicable to the requirement in the different test projects of footboard 8, consequently the test stroke of footboard 8, the size of power all can be adjusted. A counter coupled to the drive or linkage 2 records the number of trials of the pedal 8.
Example 2:
the present embodiment has the following structure based on embodiment 1:
as shown in fig. 2, the positioning table includes a fixing plate 11 and a locking device, the locking device is connected to the housing 1 in a lifting manner, the locking device includes a locking device housing 121 which is lifted by the lifting device and two locking catches 13 which are respectively used for positioning the left side and the right side of the pedal 8, the locking catches 13 are connected to the housing 1 in a hinged manner, wedge blocks 14 are arranged on the locking catches 13, the wedge blocks 13 are turned over by abutting the fixing plate 11 against the wedge blocks 14, one ends of the locking catches 13, which are far away from the wedge blocks 14, are slidably connected to guide rails 15 which are arranged along the horizontal direction, the guide rails 15 are vertically slid in the locking device housing 121, and an elastic part 16 is arranged between the guide rails 15 and the top of the locking device housing 121. The top of the locker shell 121 corresponding to the moving space of the guide rail 15 is provided with a contact 19, the contact 19 is electrically connected with the lifter, and the guide rail 15 triggers the contact 19 to control the state of the lifter.
The device adopts automatic control, after the wedge block 14 reaches the travel limit, the guide rail 15 moves up to the limit position in the locker shell 121, the contact 19 is also arranged at the corresponding position, and when the position is reached, the contact indicates that the lifter is in position and the lifter does not need to move continuously. The structure is suitable for the pedals 8 with different hinge point heights, accurate calculation from a zero-position rising position is omitted, the machine can be automatically controlled to stop through the contact 19, and automatic positioning is realized.
The structure is used for realizing the second invention purpose, and how to position the pedals 8 with different sizes and models. The different shapes of the hole sites and the different profiles of the pedals 8 of different models lead to the difficulty in positioning a specific positioning device. Because the position of the pedal 8 has a certain precision requirement, the matching of operations required for fixing after positioning is complex, more labor is required for assembly, and meanwhile, the pedal 8 is easy to slide during installation, so that the pedal needs to be repositioned. This structure has adopted automatic locking's mode location footboard 8. The height of the fixing plate 11 is adjustable and corresponds to the pedals 8 with different hinge point heights. First, the pedal 8 is positioned on the fixing plate 11. The locker housing 121 is then lifted by the lifter. After the wedge 14 hits the fixed plate 11, the wedge 14 is turned over due to the shape of the wedge 14, the wedge 14 is turned outward, the other end is turned inward, and the wedge 14 is simultaneously turned inward and upward to drive the guide rail 15 connected with the wedge in a sliding manner to move upward against the elastic piece 16. When the wedge block 14 is not in contact with the fixed plate 11, the wedge block 14 is reset under the action of the elastic piece 16, the wedge block 14 rotates reversely, the guide rail 15 moves downwards, and the wedge block 14 is buckled with the pedal 8 to complete positioning. The locker shell is provided with a vertical guide groove 18, and the guide rail is provided with a guide inserting sheet 17 matched with the guide groove 18. Because the voussoir 14 is arranged in the left and right sides of footboard 8, and the two simultaneous movement can not produce extra effort to footboard 8, can not make footboard 8 take place the skew, and this structure can one-man operation, removes from and needs many people complex loaded down with trivial details.
The top of the wedge 14 is provided with a handle block 20. When the test is completed and the pedal 8 needs to be detached from the locker, the handle block 20 can be shifted outwards to realize releasing the limit.
A locking method of a multifunctional pedal 8 fatigue performance test bench comprises the steps of:
(1) controlling the locker housing 121 to be in the zero position;
(2) placing the footplate 8 on the fixing plate 11;
(3) controlling the locker housing 121 to ascend;
(4) the lock catch 13 is abutted against the fixing plate 11 to be overturned;
(5) the guide rail 15 rises to trigger the contact 19;
(6) the contact 19 disengages from the guide rail 15;
(7) the contact 19 controls the elevator to stop;
the step of releasing the pedal 8 comprises:
(1) controlling the lock catch 13 to overturn to the travel limit and maintaining the action for 5 seconds;
(2) the guide rail 15 triggers the lifter for 5 seconds;
(3) the lifter receives the signal to reset the locker housing 121 to the zero position.
Furthermore, between the steps 6 and 7 of locking, the following steps are provided: the locker housing 121 is lowered until the contact 19 again contacts the guide rail 15 and the lifter is stopped. The step of releasing the pedal 8 further has, before (1), a step (0): the retainer housing 121 is raised to the limit of travel, i.e., the top abuts the stationary plate 11, by a button or other means.
The above-described embodiments are merely preferred embodiments of the present invention, which is not intended to be limiting in any way, and other variations and modifications are possible without departing from the scope of the invention as set forth in the appended claims.
Claims (10)
1. A multifunctional pedal fatigue performance test bench is characterized by comprising
A housing;
the positioning table is used for positioning the pedal;
a connecting rod;
a driver, the connecting rod drives the driver;
the pressure sensor is adjustably connected to the connecting rod;
a voltage sensor electrically connected to the pedal under test;
a switchboard;
the connecting rod swings and enables the pressure sensor to abut against the pedal, and the switchboard receives signals of the pressure sensor and the voltage sensor.
2. The multifunctional pedal fatigue performance test bench according to claim 1, wherein the connecting rod is provided with a rotating end and a free end, and the rotating end is coaxial with a hinge point of the pedal.
3. The multifunctional pedal fatigue performance test bench according to claim 1, wherein the connecting rod is provided with a long hole arranged along the length direction, the pressure sensor is detachably connected to the connecting rod through a fastener, and the detection direction of the pressure sensor faces the pedal and is arranged along the length direction of the connecting rod.
4. The multifunctional pedal fatigue performance test bench of claim 1, wherein the switchboard is electrically connected with the driver.
5. The multifunctional pedal fatigue performance test bench of claim 1, wherein the positioning platform is connected to the housing in a lifting manner, a positioner is arranged at the rotating end of the connecting rod, and light emitted by the positioner forms light spots on the pedal to assist in positioning the pedal.
6. The multifunctional pedal fatigue performance test bench according to any one of claims 1 to 5, wherein the positioning table comprises a fixing plate and a locker, the locker is connected to the casing in a lifting manner, the locker comprises a locker casing which is lifted through the lifter and two latches which are used for positioning the left side and the right side of the pedal respectively, the latches are hinged to the casing, the latches are provided with wedges, the wedges are abutted against the fixing plate to enable the latches to turn over, one ends of the latches, far away from the wedges, are slidably connected in guide rails which are arranged in the horizontal direction, the guide rails are vertically slid in the locker casing, and an elastic part is arranged between the guide rails and the top of the locker casing.
7. The multifunctional pedal fatigue performance test bench according to claim 6, wherein the locker housing is provided with a contact corresponding to the top of the moving space of the guide rail, the contact is electrically connected with the lifter, and the guide rail triggers the contact to control the state of the lifter.
8. The multifunctional pedal fatigue performance test bench of claim 6, wherein a handle block is arranged on the top of the wedge block.
9. A locking method of a multifunctional pedal fatigue performance test bench, which is characterized by comprising the multifunctional pedal fatigue performance test bench of claim 6, wherein the locking step comprises the following steps:
(1) controlling the locker shell to be in a zero position;
(2) placing the pedal on the fixing plate;
(3) controlling the locker shell to ascend;
(4) the lock catch is abutted against the fixed plate to be overturned;
(5) the guide rail rises to trigger the contact;
(6) the contact is separated from the guide rail;
(7) the contact controls the lifter to stop;
the step of releasing the pedal includes:
(1) controlling the lock catch to overturn to the travel limit and maintaining the action X time;
(2) triggering the lifter by the guide rail corresponding to the time of X;
(3) the lifter receives the signal, and the locker shell is reset to the zero position.
10. The method as claimed in claim 9, wherein X is 5 seconds.
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| CN202110667626.8A CN113514256A (en) | 2021-06-16 | 2021-06-16 | Multifunctional pedal fatigue performance test bench and locking method thereof |
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| CN202110667626.8A CN113514256A (en) | 2021-06-16 | 2021-06-16 | Multifunctional pedal fatigue performance test bench and locking method thereof |
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