CN114526899A - Caster wheel rotation performance detection equipment and detection method based on magnetic suspension technology - Google Patents
Caster wheel rotation performance detection equipment and detection method based on magnetic suspension technology Download PDFInfo
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Abstract
The invention discloses caster rotation performance detection equipment and a caster rotation performance detection method based on a magnetic suspension technology, and belongs to the technical field of caster performance testing. The caster rotation performance detection equipment comprises a base, side frames, a suspension support frame, an electromagnet loading mechanism, a pressure sensor, a tension sensor, a traction rope and a horizontal traction mechanism, wherein magnets with the same magnetic poles opposite are arranged on the side frames and the suspension support frame, stable suspension support of the suspension support frame for mounting a caster to be detected is realized by using a magnetic suspension principle, and non-contact load loading is realized by using the electromagnet loading mechanism, so that no contact friction exists between the suspension support frame and the base and between the suspension support frame and the side frames, the detected horizontal tension value of the caster is more accurate, the rotation performance of the caster under rated load can be accurately obtained, a reliable detection means is provided for judging whether the quality of the caster reaches the standard, and the caster rotation performance detection equipment has the advantages of simple structure, accurate detection data, simplicity and convenience in operation and the like.
Description
Technical Field
The invention relates to a quality detection device and a detection method of a caster, in particular to a caster rotation performance detection device and a caster rotation performance detection method based on a magnetic suspension technology.
Background
Casters are the general term for casters for universal, directional and braking, and are widely used in transportation vehicles such as trolleys, shop trucks and transfer nursing beds. Data shows that the degree of development in a city is in positive correlation with the amount of casters used, that is, the more developed the industrial area, the higher the utilization rate of casters.
Also, since the caster has a very wide range of application fields and usage scenarios, higher demands are placed on the performance of the caster. The national standard GB/T14687 plus 2011 'industrial caster and wheel' makes mandatory requirements on various technical requirements and test methods of the caster, and requires that the hardness, overload capacity, wheel circular run-out, caster braking force, steering braking force, horizontal static pressure, vertical static pressure, rotation performance, steering performance and walking performance of the caster are tested, so that the caster produced and sold by enterprises meets various technical requirements. Wherein the caster wheel has a rotation resistance coefficient mu at a rated load1The test method is characterized in that the caster or the wheel is arranged on a caster rotation performance testing machine, rated load W is applied to the caster or the wheel along the direction of a plumb, force is applied to a wheel shaft along the horizontal direction, and the minimum value F required for rotating the caster or the wheel is measured1，F1I.e. the resistance to rotation of the caster, mu1＝F1/W。
Chinese patent No. ZL200920193783.4 discloses "truckle rotation turns to performance testing machine", it includes the frame, be equipped with the guide pillar in the frame, the cover is equipped with the platform that is used for placing the truckle on the guide pillar, platform top cover is equipped with can be on the guide pillar gliding top board, the platform below is equipped with roof pressure loading device, the truckle can be invertd in the platform top, the overhead gage below can hang and invert the just truckle that the truckle corresponds, it sticiss between truckle just to put the truckle and the inversion truckle and is equipped with the friction arm-tie, friction arm-tie one side is equipped with tension device, it has pulling force reading device to cluster between friction arm-tie and the tension device. During measurement, three trundle rotating shafts and a steel wire rope are vertically and inversely installed in a lower installation groove of a platform, three corresponding upright trundles are installed in an upper installation groove of an upper pressing plate, a friction pulling plate is placed between the upper and lower trundles, a hydraulic oil cylinder applies rated load W to the trundles along the plumb bob direction, the friction pulling plate is connected with the steel wire rope, the steel wire rope is driven by a motor to apply force along the horizontal direction to pull the friction pulling plate, and a reading device connected to the steel wire rope in series reads that the friction pulling plate is pulledReading F, measuring the minimum value F required for rotating the caster1Namely the rotation resistance of the caster.
However, the above patent application requires at least one set of upright caster and inverted caster to apply a rated load, and the measured force required for rotation of the caster is the force of simultaneous rotation of the upright caster and the inverted caster, which cannot accurately represent the rotation resistance coefficient of a single caster under the rated load, and thus cannot ensure whether the rotation performance of the single caster meets the national standard. In fact, the rotation performance test of the single caster is a difficult point because the single caster is difficult to stably support. The prior art can adopt a sliding guide support to support a single caster, but the sliding guide support inevitably has frictional resistance, and the measured caster rotation resistance contains frictional force required to overcome the support sliding, thus leading to inaccurate test data.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defect that the existing caster rotation performance test device has inaccurate test data, and provides caster rotation performance detection equipment and a detection method based on a magnetic suspension technology.
2. Technical scheme
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
the invention relates to a caster rotation performance detection device based on a magnetic suspension technology, which comprises a base, side frames, a suspension support frame, an electromagnet loading mechanism, a pressure sensor, a tension sensor, a traction rope and a horizontal traction mechanism, wherein the side frames are arranged in two groups on the base in parallel from left to right, a middle channel is formed between the two groups of side frames, the two groups of side frames are respectively provided with a side frame vertical magnet positioned at the top and a side frame lateral magnet positioned on the inner side of the middle channel, and the side frame vertical magnet and the side frame lateral magnet are horizontally arranged along the length direction of the middle channel; the suspension support frame comprises an upper bracket, support frames and a middle mounting seat, the support frames are respectively and vertically arranged at the left side and the right side of the upper bracket, the lower ends of the support frames at the two sides are respectively provided with an electromagnet loading mechanism for applying a load in the plumb direction to the caster wheel to be tested, the middle mounting seat is fixedly arranged below the middle of the upper bracket, the middle mounting seat is positioned in the middle channel, the left side and the right side of the upper bracket are respectively provided with a vertical suspension magnet corresponding to the vertical magnet of the side frame on the corresponding side, the left side and the right side of the middle mounting seat are respectively provided with a lateral suspension magnet corresponding to the lateral magnet of the side frame on the corresponding side, the side frame vertical magnet and the vertical suspension magnet are opposite to the same-name magnetic poles of the side frame lateral magnet and the lateral suspension magnet, so that the suspension support frame and the side frame are kept in a non-contact suspension state; the utility model discloses a trundle mounting structure, including middle mount pad, truckle mount pad, force sensor, passage length direction level set up in the middle of the drawing rope that is connected with horizontal drive mechanism, the below of middle mount pad be equipped with the truckle mount pad that is used for installing the truckle that awaits measuring, the top of truckle mount pad be equipped with and be used for detecting the pressure sensor who awaits measuring the truckle rated load that receives, the horizontal direction of truckle mount pad be equipped with and be used for detecting the truckle that awaits measuring horizontal tensile force's tensile force sensor, force sensor be connected with horizontal drive mechanism through the haulage rope that sets up along middle passageway length direction level.
Furthermore, the side frame vertical magnet and the side frame lateral magnet are strip-shaped track magnets formed by arranging a plurality of strong magnets; the vertical suspension magnet and the lateral suspension magnet are strong magnets.
Further, the truckle mount pad be connected through altitude mixture control mechanism and middle mount pad, altitude mixture control mechanism include altitude mixture control pole and lift seat, the vertical lift seat that is fixed in of altitude mixture control pole on, the altitude mixture control pole pass and connect through adjusting nut behind the mounting hole of middle mount pad bottom, pressure sensor locate between truckle mount pad and the lift seat.
Further, electromagnet loading mechanism include magnet mount pad, guide bar, electro-magnet and adjusting screw, guide bar and adjusting screw vertical being fixed in respectively on the magnet mount pad, guide bar upper end and the braced frame bottom sliding guide cooperation that corresponds the side, adjusting screw pass and connect through adjusting nut behind the braced frame bottom mounting hole that corresponds the side, electro-magnet fixed mounting in the bottom of magnet mount pad, the base adopt with electro-magnet matched with ferromagnetic material preparation or be equipped with on the base with the corresponding ferromagnetic plate in electro-magnet position.
Furthermore, horizontal drive mechanism be weight drive mechanism, weight drive mechanism include lift adjustment mechanism, pulley and weight, the pulley install in one side of side frame through lift adjustment mechanism, the haulage rope be connected with the weight after walking around the pulley, adjust the horizontal tension of the truckle that awaits measuring through changing weight.
Furthermore, the horizontal traction mechanism is a motor traction mechanism, the motor traction mechanism comprises a lifting adjusting mechanism, a pulley, a sheave and a motor, the pulley is mounted on one side of the side frame through the lifting adjusting mechanism, the motor is mounted on the side frame through a motor mounting seat, the sheave is in transmission connection with an output shaft of the motor, the traction rope winds on the sheave after bypassing the pulley, and the horizontal tension of the caster to be detected is adjusted by controlling the output torque of the motor.
The invention discloses a detection method of caster rotation performance detection equipment based on a magnetic suspension technology, which comprises the following steps of:
s1, adjusting the height of the caster mounting seat and the height position of the electromagnet loading mechanism according to the size specification of the caster to be tested, and then mounting the caster to be tested on the caster mounting seat to enable the suspension support frame to be integrally suspended on the side frame and be free of contact with the side frame and the base;
s2, connecting the traction rope with a horizontal traction mechanism, and adjusting the traction rope to a horizontal position;
s3, starting the electromagnet loading mechanism, applying a downward acting force to the suspension support frame by changing the magnitude of current to make the caster wheel to be detected contact with the base, and maintaining the current of the electromagnet loading mechanism constant after the pressure value detected by the pressure sensor reaches the rated load value W detected by the caster wheel to be detected;
s4, horizontally drawing the caster wheel to be measured through the horizontal drawing mechanism, simultaneously detecting the magnitude of the drawing force by using the tension sensor, and measuring the minimum drawing force value F required by the rotation of the caster wheel to be measured1；
S5, passing formula mu1＝F1Calculating the rotation resistance coefficient mu of the caster wheel to be measured under rated load by using the method of the first step of the calculation1And judging whether the rotation performance of the caster wheel to be detected reaches the standard or not.
3. Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following remarkable effects:
(1) the invention relates to a caster rotation performance detection device based on a magnetic suspension technology, which comprises a base, side frames, a suspension support frame, an electromagnet loading mechanism, a pressure sensor, a tension sensor, a traction rope and a horizontal traction mechanism, wherein two groups of side frames are respectively provided with a side frame vertical magnet positioned at the top and a side frame lateral magnet positioned on the inner side of a middle channel, the suspension support frame comprises an upper bracket, a support frame and a middle installation seat, the lower ends of the two side support frames are respectively provided with the electromagnet loading mechanism used for applying a plumb direction load to a caster to be detected, the left side and the right side of the upper bracket are respectively provided with vertical suspension magnets corresponding to the positions of the side frame vertical magnets on the corresponding sides, the left side and the right side of the middle installation seat are respectively provided with lateral suspension magnets corresponding to the positions of the side frame lateral magnets on the corresponding sides, the side frame vertical magnets and the vertical suspension magnets, The side frame lateral magnet is opposite to the same-name magnetic pole of the lateral suspension magnet, so that the suspension support frame and the side frame are kept in a non-contact suspension state; the stable suspension support of the suspension support frame for mounting the caster wheel to be detected is realized by utilizing a magnetic suspension principle, and the contactless load loading is realized by utilizing an electromagnet loading mechanism, so that the suspension support frame has contactless friction with the base and the side frame, the detected horizontal tension value of the caster wheel is more accurate, the rotation performance of the caster wheel under the rated load can be accurately obtained, a reliable detection means is provided for whether the quality of the caster wheel reaches the standard, and the device has the advantages of simple structure, accurate detection data, simplicity and convenience in operation and the like;
(2) according to the caster rotation performance detection equipment based on the magnetic suspension technology, the side frame vertical magnets and the side frame lateral magnets are strip-shaped track magnets formed by arranging a plurality of strong magnets, the vertical suspension magnets and the lateral suspension magnets are strong magnets, and the magnetic field distribution of the detection section is uniform by matching the strip-shaped track magnets with the strong magnets, so that not only can a stable suspension state be ensured, but also the suspension support frame can horizontally move without resistance, and the stability and the accuracy of caster rotation performance detection are improved;
(3) according to the caster rotation performance detection equipment based on the magnetic suspension technology, a caster mounting seat is connected with a middle mounting seat through a height adjusting mechanism, the height adjusting mechanism comprises a height adjusting rod and a lifting seat, the height adjusting rod is vertically fixed on the lifting seat, the height adjusting rod penetrates through a mounting hole in the bottom of the middle mounting seat and then is connected through an adjusting nut, and a pressure sensor is arranged between the caster mounting seat and the lifting seat; the height adjusting mechanism can be used for adjusting the height according to the trundles with different sizes and specifications, so that the suspension support frame can be kept in a stable suspension state, the electromagnet loading mechanism can stably load the load of the trundles without contact, and the detection equipment can meet the detection of the rotation performance of the trundles with various specifications and types;
(4) according to the caster rotation performance detection equipment based on the magnetic suspension technology, the electromagnet loading mechanism comprises the magnet mounting seat, the guide rod, the electromagnet and the adjusting screw rod, the height of the electromagnet can be adjusted through the adjusting screw rod, the electromagnet can be loaded in a non-contact mode, the structural design is simple, and the load size is convenient and accurate to control;
(5) according to the trundle rotation performance detection equipment based on the magnetic suspension technology, the horizontal traction mechanism adopts the weight traction mechanism, the weight traction mechanism comprises the lifting adjusting mechanism, the pulley and the weight, the pulley is installed on one side of the side frame through the lifting adjusting mechanism, the traction rope is connected with the weight after bypassing the pulley, the horizontal tension of the trundle to be detected is adjusted by changing the weight of the weight, and the weight traction mechanism is adopted, so that the structure is simple, and the operation is convenient;
(6) the invention relates to a trundle rotation performance detection device based on magnetic suspension technology, wherein a horizontal traction mechanism adopts a motor traction mechanism, the motor traction mechanism comprises a lifting adjusting mechanism, a pulley, a sheave and a motor, the pulley is arranged on one side of a side frame through the lifting adjusting mechanism, the motor is arranged on the side frame through a motor mounting seat, the sheave is in transmission connection with an output shaft of the motor, a traction rope winds on the sheave after winding around the pulley, the horizontal tension of a trundle to be detected is adjusted by controlling the output torque of the motor, the horizontal tension of the trundle can be controlled by using the output torque of the motor through the motor traction mechanism, the applied tension is controlled more simply and conveniently, and the minimum traction force value F required by the rotation of the trundle is1The detection is more accurate;
(7) according to the detection method of the caster rotation performance detection equipment based on the magnetic suspension technology, the caster is simple and convenient to mount on the detection equipment, the load in the direction of the plumb of the caster is convenient to load, the load is accurate to control, the horizontal tension of the caster is simple and convenient to control, and the pressure sensor and the tension sensor can be used for accurately obtaining related detection data, so that the detection operation is simpler and easier, and the detection data is accurate.
Drawings
Fig. 1 is a schematic structural diagram of a caster rotation performance detection apparatus based on magnetic levitation technology according to embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of a side frame portion in embodiment 1 of the present invention;
fig. 3 is a schematic view of a matching structure of an electromagnet loading mechanism and a horizontal traction mechanism in embodiment 1 of the present invention;
fig. 4 is a schematic structural view of a suspension support frame portion in embodiment 1 of the present invention;
fig. 5 is a schematic structural diagram of a caster rotation performance detection apparatus based on magnetic levitation technology in embodiment 2 of the present invention;
fig. 6 is a schematic view of a matching structure of an electromagnet loading mechanism and a horizontal traction mechanism in embodiment 2 of the present invention;
fig. 7 is a schematic structural view of a motor traction mechanism in embodiment 2 of the present invention.
The reference numerals in the schematic drawings illustrate:
1. a base; 1-1, supporting feet; 2. a side frame; 2a, a middle channel; 2-1, side frame vertical magnets; 2-2, side frame side magnet; 3. a suspension support frame; 3-1, mounting a bracket; 3-2, supporting the frame; 3-3, a middle mounting base; 3-4, vertical suspension magnets; 3-5, a lateral suspension magnet; 3-6, height adjusting rod; 3-7, a lifting seat; 3-8, a caster wheel mounting seat; 4. an electromagnet loading mechanism; 4-1, a magnet mounting seat; 4-2, a guide rod; 4-3, an electromagnet; 4-4, adjusting a screw rod; 5. a pressure sensor; 6. a tension sensor; 7. a caster to be tested; 8. a hauling rope; 9. a weight traction mechanism; 9-1, a lifting guide rod; 9-2, a sliding seat plate; 9-3, a lifting screw rod; 9-4, a screw nut; 9-5, a hand wheel; 9-6, a pulley; 9-7, and weights; 10. a motor traction mechanism; 10-1, a lifting guide rod; 10-2, a sliding seat plate; 10-3, a lifting screw rod; 10-4, a screw nut; 10-5, a hand wheel; 10-6, a pulley; 10-7, a motor mounting seat; 10-8, grooved pulley; 10-9 and a motor.
Detailed Description
For a further understanding of the invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings and examples.
[ example 1]
Referring to fig. 1 to 4, the magnetic suspension technology-based caster rotation performance detection device of the embodiment includes a base 1, side frames 2, a suspension support frame 3, an electromagnet loading mechanism 4, a pressure sensor 5, a tension sensor 6, a traction rope 8 and a horizontal traction mechanism, wherein four corners of the base 1 are respectively provided with a support leg 1-1, the height of the support leg 1-1 is adjustable so as to ensure that the base 1 is in a horizontal state, the side frames 2 are rectangular frame structures, the side frames 2 are parallelly provided with two groups on the base 1 at left and right sides, a middle channel 2a is formed between the two groups of side frames 2, the middle channel 2a is used for installation and walking of a caster 7 to be detected, the two groups of side frames 2 are respectively provided with a side frame vertical magnet 2-1 positioned at the top and a side frame lateral magnet 2-2 positioned on the inner side of the middle channel 2a, and the side frame vertical magnet 2-1 and the side frame lateral magnet 2-2 are both positioned along the length of the middle channel 2a The directions are horizontally arranged; the suspension support frame 3 comprises an upper bracket 3-1, support frames 3-2 and a middle mounting seat 3-3, the support frames 3-2 are respectively vertically arranged at the left side and the right side of the upper bracket 3-1, the lower ends of the support frames 3-2 at the two sides are respectively provided with an electromagnet loading mechanism 4 for applying a plumb direction load to a caster 7 to be tested, the middle mounting seat 3-3 is fixedly arranged below the middle of the upper bracket 3-1, the middle mounting seat 3-3 is positioned in a middle channel 2a, the left side and the right side of the upper bracket 3-1 are respectively provided with a vertical suspension magnet 3-4 corresponding to the position of the vertical magnet 2-1 of the side frame at the corresponding side, the left side and the right side of the middle mounting seat 3-3 are respectively provided with a lateral suspension magnet 3-5 corresponding to the position of the lateral magnet 2-2 of the side frame at the corresponding side, the side frame vertical magnet 2-1 is opposite to the vertical suspension magnet 3-4, and the side frame lateral magnet 2-2 is opposite to the lateral suspension magnet 3-5, the side frame vertical magnet 2-1 and the vertical suspension magnet 3-4 are used for keeping the suspension support frame 3 in an up-and-down suspension state, and the side frame lateral magnet 2-2 and the lateral suspension magnet 3-5 are used for keeping the suspension support frame 3 in a left-and-right suspension state, so that the suspension support frame 3 and the side frame 2 are kept in a non-contact suspension state. The lower part of middle mount pad 3-3 is equipped with the truckle mount pad 3-8 that is used for installing truckle 7 that awaits measuring, and truckle mount pad 3-8 is used for the quick installation and the dismantlement of truckle 7 that awaits measuring, for convenient picture, only replaces truckle 7 that awaits measuring with the gyro wheel in the drawing and illustrates, and the support body of truckle 7 that awaits measuring can adopt the fix with screw on truckle mount pad 3-8. A pressure sensor 5 for detecting rated load borne by the caster wheel 7 to be detected is arranged above the caster wheel mounting seat 3-8, a tension sensor 6 for detecting horizontal tension borne by the caster wheel 7 to be detected is arranged in the horizontal direction of the caster wheel mounting seat 3-8, and the tension sensor 6 is connected with a horizontal traction mechanism through a traction rope 8 horizontally arranged along the length direction of the middle channel 2 a. The trundle 7 to be tested is installed on the trundle installation seat 3-8 at the bottom of the middle installation seat 3-3, the electromagnet loading mechanism 4 is used for applying a load in the plumb direction to the trundle 7 to be tested, the load size is detected by the pressure sensor 5, the horizontal traction mechanism performs horizontal traction on the trundle 7 to be tested through the traction rope 8, the traction force size is detected by the tension sensor 6, and under the action of a rated load applied by the electromagnet loading mechanism 4, the horizontal traction mechanism drives the minimum rotating tension of the trundle 7 to be tested to be the rotating resistance of the trundle. The utility model provides a truckle rotation performance check out test set based on magnetic suspension technique, utilize the magnetic suspension principle to realize the stable suspension support of the suspension support frame of installation truckle that awaits measuring, and utilize electromagnet loading mechanism to realize contactless load loading, make suspension support frame and base, contactless friction between the side frame, make the truckle that the detection obtained receive the tensile numerical value of level more accurate, and then can accurately obtain the rotation performance of truckle under rated load, whether up to standard provides a reliable detection means for the quality of truckle, it is simple to have a check out test set structure, it is accurate to detect data, advantages such as easy operation is convenient.
As shown in fig. 2, in the present embodiment, the side frame vertical magnet 2-1 and the side frame lateral magnet 2-2 are both strip track magnets formed by arranging a plurality of strong magnets; the vertical suspension magnets 3-4 and the lateral suspension magnets 3-5 are strong magnets. The length of the side frame vertical magnet 2-1 and the side frame lateral magnet 2-2 is larger than the effective stroke of the trundle detection test, and the strip-shaped track magnets are matched with the strong magnets, so that the magnetic field of the detection section is uniformly distributed, a stable suspension state can be ensured, the suspension support frame 3 is horizontally moved without resistance, and the stability and accuracy of trundle rotation performance detection are improved.
As shown in figures 3 and 4, in order to adapt to the rotation performance test requirements of casters with different specifications and types, in the embodiment, the caster mounting base 3-8 is connected with the middle mounting base 3-3 through a height adjusting mechanism, the height adjusting mechanism comprises a height adjusting rod 3-6 and a lifting base 3-7, the height adjusting rod 3-6 is vertically fixed on the lifting base 3-7, the height adjusting rod 3-6 passes through a mounting hole at the bottom of the middle mounting base 3-3 and then is connected through an adjusting nut, two adjusting nuts are arranged on the height adjusting rod 3-6, a mounting plate at the bottom of the middle mounting base 3-3 is clamped between an upper adjusting nut and a lower adjusting nut, the height of the lifting base 3-7 can be freely adjusted through the adjusting nuts, and the height adjusting mechanism can be used for carrying out height adjustment according to casters with different dimensions, the suspension support frame 3 can be kept in a stable suspension state, the electromagnet loading mechanism 4 can stably load the caster load without contact, and the detection equipment can meet the rotation performance detection of casters of various specifications and types. The pressure sensor 5 is arranged between the caster wheel mounting seat 3-8 and the lifting seat 3-7, so that the size of the plumb direction load borne by the caster wheel 7 to be detected can be reflected. In order to ensure the stable installation of the lifting seats 3-7, two groups of height adjusting rods 3-6 can be arranged at the two ends of the lifting seats 3-7 so as to prevent the caster 7 to be detected from inclining.
As shown in fig. 3 and 4, in this embodiment, the electromagnet loading mechanism 4 includes a magnet mounting seat 4-1, a guide rod 4-2, an electromagnet 4-3, and an adjusting screw 4-4, the guide rod 4-2 and the adjusting screw 4-4 are respectively vertically fixed on the magnet mounting seat 4-1, the upper end of the guide rod 4-2 is slidably and guidedly matched with the bottom of the supporting frame 3-2 on the corresponding side, two sets of guide rods 4-2 are provided for vertical adjustment and guidance of the magnet mounting seat 4-1, the upper end of the adjusting screw 4-4 passes through the mounting hole at the bottom of the supporting frame 3-2 on the corresponding side and is connected with the mounting hole through an adjusting nut, two adjusting nuts are also provided on the adjusting screw 4-4, the bottom rod of the supporting frame 3-2 is clamped between the two adjusting nuts, the height adjustment of the adjusting screw rod 4-4 is realized through the adjusting nut, so that the height position of the electromagnet 4-3 can be conveniently adjusted, the electromagnet can be loaded without contact, the structural design is simple, and the load size is conveniently and accurately controlled; the electromagnets 4-3 are fixedly arranged at the bottom of the magnet mounting seat 4-1, preferably two electromagnets 4-3 are arranged, the base 1 is made of ferromagnetic materials matched with the electromagnets 4-3 or a ferromagnetic plate corresponding to the electromagnets 4-3 is arranged on the base 1. After the electromagnet 4-3 is electrified, the electromagnet 4-3 is magnetized to generate attraction with the base 1 or the ferromagnetic plate on the base 1, the magnitude of the attraction can be changed by adjusting the current of the electromagnet 4-3, and then the magnitude of the plumb load applied to the caster 7 to be detected is changed. By the electromagnet loading mechanism 4, the plumb load is generated, and meanwhile, the electromagnet 4-3 is not in contact with the base 1 or the side frame 2, so that resistance interference in the horizontal direction does not exist.
Further, as shown in fig. 3, the horizontal traction mechanism is a weight traction mechanism 9, the weight traction mechanism 9 includes a lifting adjustment mechanism, a pulley 9-6 and a weight 9-7, the pulley 9-6 is mounted on one side of the side frame 2 through the lifting adjustment mechanism, the lifting adjustment mechanism is used for adjusting the height of the pulley 9-6 so as to keep the traction rope 8 horizontal, the traction rope 8 is connected with the weight 9-7 after passing around the pulley 9-6, and the horizontal tension of the caster 7 to be measured is adjusted by changing the weight of the weight 9-7. And a weight traction mechanism 9 is adopted, so that the structure is simple and the operation is convenient. The lifting adjusting mechanism comprises a lifting guide rod 9-1, a sliding seat plate 9-2, a lifting screw rod 9-3, a screw rod nut 9-4 and a hand wheel 9-5, wherein the lifting guide rod 9-1 is vertically arranged at one side of the side frame 2, the sliding seat plate 9-2 is slidably arranged on the lifting guide rod 9-1, a pulley 9-6 is arranged on the sliding seat plate 9-2, the lower end of the lifting screw rod 9-3 is rotatably arranged on the sliding seat plate 9-2, the middle part of the lifting screw rod 9-3 is in threaded fit with the screw rod nut 9-4 arranged at the top of the side frame 2, the hand wheel 9-5 is fixed at the top of the lifting screw rod 9-3, the sliding seat plate 9-2 can be driven to move up and down by rotating the hand wheel 9-5, and the traction rope 8 is kept in a horizontal state by controlling the pulley 9-6 to move up and down.
The detection method of the caster rotation performance detection equipment based on the magnetic suspension technology comprises the following steps:
s1, adjusting the height of the caster mounting seat 3-8 and the height position of the electromagnet loading mechanism 4 according to the size specification of the caster 7 to be tested, and then mounting the caster 7 to be tested on the caster mounting seat 3-8 to enable the suspension support frame 3 to be suspended on the side frame 2 integrally and to be free of contact with the side frame 2 and the base 1; the caster 7 to be tested can be contacted with the base 1 or slightly suspended, and the suspension support frame 3 and the caster 7 to be tested are moved to a proper position;
s2, connecting the traction rope 8 with a horizontal traction mechanism, and adjusting the traction rope 8 to a horizontal position;
s3, starting the electromagnet loading mechanism 4, applying a downward acting force to the suspension support frame 3 by changing the current, enabling the caster 7 to be tested to be in contact with the base 1, and maintaining the current of the electromagnet loading mechanism 4 constant after the pressure value detected by the pressure sensor 5 reaches the rated load value W detected by the caster 7 to be tested; at the moment, the electromagnet loading mechanism 4 is utilized to apply a load in the direction of a plumb to the caster 7 to be tested, only the caster 7 to be tested is in contact with the base 1 at the moment, and the suspension support frame 3 and the electromagnet loading mechanism 4 are both not in contact with the base 1 or the side frame 2;
s4, horizontally drawing the caster 7 to be measured through the horizontal drawing mechanism, simultaneously detecting the magnitude of the drawing force by using the tension sensor 6, and measuring the minimum drawing force value F required by the rotation of the caster 7 to be measured1(ii) a Namely, the weight 9-7 is replaced or added, the tension value of the traction rope 8 is increased, when the caster 7 to be tested starts to rotate and rotates for at least one half of a circle, the numerical value detected by the tension sensor 6 at the moment is taken, and the numerical value is the minimum traction value F1；
S5, passing formula mu1＝F1The rotation resistance coefficient mu of the caster 7 to be measured under rated load is calculated by the aid of the method1And a prescribed resistance coefficient mu1And (5) comparing and judging whether the rotation performance of the caster 7 to be detected reaches the standard or not.
By adopting the caster rotation performance detection equipment and the caster rotation performance detection method, the caster is simple and convenient to mount on the detection equipment, the load in the direction of the caster plumb is convenient to load, the load size is accurately controlled, the horizontal tension of the caster is simple and convenient to control, the pressure sensor and the tension sensor can be used for accurately obtaining related detection data, the detection operation is simpler and easier, and the detection data is accurate.
[ example 2]
Referring to fig. 5 to 7, the basic structure and the operation principle of the caster rotation performance detecting apparatus based on magnetic levitation technology in this embodiment are the same as those in embodiment 1, except that:
in this embodiment, the horizontal traction mechanism is a motor traction mechanism 10, the motor traction mechanism 10 includes a lifting adjustment mechanism, a pulley 10-6, a sheave 10-8 and a motor 10-9, the pulley 10-6 is mounted on one side of the side frame 2 through the lifting adjustment mechanism, the lifting adjustment mechanism is used for adjusting the height of the pulley 10-6 to keep the traction rope 8 horizontal, the motor 10-9 is mounted on the side frame 2 through a motor mounting seat 10-7, the sheave 10-8 is in transmission connection with an output shaft of the motor 10-9, the traction rope 8 winds around the pulley 9-6 and then winds around the grooveOn the wheel 10-8, the horizontal tension of the caster wheel 7 to be measured is adjusted by controlling the torque output by the motor 10-9. The horizontal tension of the caster can be controlled by adopting the motor traction mechanism 10 and utilizing the torque output by the motor 10-9, the applied tension is controlled more simply and conveniently, and the minimum traction force value F required by the rotation of the caster is1The detection is more accurate. The lifting adjusting mechanism comprises a lifting guide rod 10-1, a sliding seat plate 10-2, a lifting screw rod 10-3, a screw rod nut 10-4 and a hand wheel 10-5, wherein the lifting guide rod 10-1 is vertically arranged on one side of a side frame 2, the sliding seat plate 10-2 is slidably arranged on the lifting guide rod 10-1, the pulley 10-6 is arranged on the sliding seat plate 10-2, the lower end of the lifting screw rod 10-3 is rotatably arranged on the sliding seat plate 10-2, the middle part of the lifting screw rod is in threaded fit with the screw rod nut 10-4 arranged on the top of the side frame 2, the hand wheel 10-5 is fixed on the top of the lifting screw rod 10-3, the sliding seat plate 10-2 can be driven to move up and down by rotating the hand wheel 10-5, and then the pulley 10-6 is controlled to move up and down to keep the traction rope 8 in a horizontal state, the traction force required by the rotation of the caster is more accurate.
The detection method of the caster rotation performance detection equipment based on the magnetic suspension technology comprises the following steps:
s1, adjusting the height of the caster mounting seat 3-8 and the height position of the electromagnet loading mechanism 4 according to the size specification of the caster 7 to be tested, and then mounting the caster 7 to be tested on the caster mounting seat 3-8 to enable the suspension support frame 3 to be suspended on the side frame 2 integrally and to be free of contact with the side frame 2 and the base 1; the caster 7 to be tested can be contacted with the base 1 or slightly suspended, and the suspension support frame 3 and the caster 7 to be tested are moved to a proper position;
s2, connecting the traction rope 8 with a horizontal traction mechanism, and adjusting the traction rope 8 to a horizontal position;
s3, starting the electromagnet loading mechanism 4, applying a downward acting force to the suspension support frame 3 by changing the current, enabling the caster 7 to be tested to be in contact with the base 1, and maintaining the current of the electromagnet loading mechanism 4 constant after the pressure value detected by the pressure sensor 5 reaches the rated load value W detected by the caster 7 to be tested; at the moment, the electromagnet loading mechanism 4 is utilized to apply a load in the direction of a plumb to the caster 7 to be tested, only the caster 7 to be tested is in contact with the base 1 at the moment, and the suspension support frame 3 and the electromagnet loading mechanism 4 are both not in contact with the base 1 or the side frame 2;
s4, horizontally drawing the caster 7 to be measured through the horizontal drawing mechanism, simultaneously detecting the magnitude of the drawing force by using the tension sensor 6, and measuring the minimum drawing force value F required by the rotation of the caster 7 to be measured1(ii) a Namely, the torque output by the motors 10-9 is controlled to increase the tension value of the traction rope 8, and when the caster 7 to be detected starts to rotate and rotates for at least one half of a circle, the numerical value detected by the tension sensor 6 at the moment is taken as the minimum traction value F1；
S5, passing formula mu1＝F1The rotation resistance coefficient mu of the caster 7 to be measured under rated load is calculated by the aid of the method1And a prescribed resistance coefficient μ1And (5) comparing and judging whether the rotation performance of the caster 7 to be detected reaches the standard or not.
By adopting the caster rotation performance detection equipment and the caster rotation performance detection method, the caster is simple and convenient to mount on the detection equipment, the load in the direction of the caster plumb is convenient to load, the load size is accurately controlled, the horizontal tension of the caster is simple and convenient to control, the pressure sensor and the tension sensor can be used for accurately obtaining related detection data, the detection operation is simpler and easier, and the detection data is accurate.
According to the trundle rotation performance detection equipment and the trundle rotation performance detection method based on the magnetic suspension technology, stable suspension support of the suspension support frame for mounting the trundle to be detected is achieved by using the magnetic suspension principle, contactless load loading is achieved by using the electromagnet loading mechanism, contactless friction is achieved between the suspension support frame and the base and between the suspension support frame and the side frame, the detected horizontal tension value of the trundle is more accurate, the rotation performance of the trundle under the rated load can be accurately obtained, a reliable detection means is provided for whether the quality of the trundle reaches the standard, and the trundle rotation performance detection equipment has the advantages of being simple in structure, accurate in detection data, simple and convenient to operate and the like.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
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 invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The present invention and its embodiments have been described above schematically, without limitation, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching, without departing from the spirit of the invention, the person skilled in the art shall not inventively design the similar structural modes and embodiments to the technical solution, but shall fall within the scope of the invention.
Claims (7)
1. The utility model provides a truckle rotation performance check out test set based on magnetic suspension technique which characterized in that: the device comprises a base (1), side frames (2), a suspension support frame (3), an electromagnet loading mechanism (4), pressure sensors (5), tension sensors (6), a traction rope (8) and a horizontal traction mechanism, wherein the side frames (2) are parallelly arranged in two groups on the base (1) from left to right, a middle channel (2a) is formed between the two groups of side frames (2), each of the two groups of side frames (2) is provided with a side frame vertical magnet (2-1) positioned at the top and a side frame lateral magnet (2-2) positioned on the inner side of the middle channel (2a), and the side frame vertical magnet (2-1) and the side frame lateral magnet (2-2) are horizontally arranged along the length direction of the middle channel (2 a); the suspension support frame (3) comprises an upper bracket (3-1), support frames (3-2) and a middle mounting seat (3-3), the support frames (3-2) are respectively and vertically mounted on the left side and the right side of the upper bracket (3-1), the lower ends of the support frames (3-2) on the two sides are respectively provided with an electromagnet loading mechanism (4) for applying a plumb direction load to a caster (7) to be tested, the middle mounting seat (3-3) is fixedly mounted below the middle of the upper bracket (3-1), the middle mounting seat (3-3) is positioned in a middle channel (2a), the left side and the right side of the upper bracket (3-1) are respectively provided with vertical suspension magnets (3-4) corresponding to the positions of the side frame vertical magnets (2-1) on the corresponding side, lateral suspension magnets (3-5) corresponding to the lateral magnets (2-2) of the side frames on the corresponding side are respectively arranged on the left side and the right side of the middle mounting seat (3-3), and the like magnetic poles of the vertical magnets (2-1) of the side frames and the vertical suspension magnets (3-4) and the lateral magnets (2-2) of the side frames and the lateral suspension magnets (3-5) are opposite to each other, so that the suspension support frame (3) and the side frames (2) are kept in a non-contact suspension state; the device is characterized in that a caster mounting seat (3-8) used for mounting a caster (7) to be tested is arranged below the middle mounting seat (3-3), a pressure sensor (5) used for detecting rated load borne by the caster (7) to be tested is arranged above the caster mounting seat (3-8), a tension sensor (6) used for detecting horizontal tension borne by the caster (7) to be tested is arranged in the horizontal direction of the caster mounting seat (3-8), and the tension sensor (6) is connected with a horizontal traction mechanism through a traction rope (8) horizontally arranged along the length direction of the middle channel (2 a).
2. The device for detecting the rotation performance of the caster based on the magnetic levitation technology as claimed in claim 1, wherein: the side frame vertical magnet (2-1) and the side frame lateral magnet (2-2) are strip-shaped track magnets formed by arranging a plurality of strong magnets; the vertical suspension magnets (3-4) and the lateral suspension magnets (3-5) are strong magnets.
3. The device for detecting the rotation performance of the caster based on the magnetic levitation technology as claimed in claim 1, wherein: the caster wheel mounting seat (3-8) is connected with the middle mounting seat (3-3) through a height adjusting mechanism, the height adjusting mechanism comprises a height adjusting rod (3-6) and a lifting seat (3-7), the height adjusting rod (3-6) is vertically fixed on the lifting seat (3-7), the height adjusting rod (3-6) penetrates through a mounting hole in the bottom of the middle mounting seat (3-3) and then is connected through an adjusting nut, and the pressure sensor (5) is arranged between the caster wheel mounting seat (3-8) and the lifting seat (3-7).
4. The device for detecting the rotation performance of the caster based on the magnetic levitation technology as claimed in claim 1, wherein: the electromagnet loading mechanism (4) comprises a magnet mounting seat (4-1), a guide rod (4-2), an electromagnet (4-3) and an adjusting screw rod (4-4), wherein the guide rod (4-2) and the adjusting screw rod (4-4) are vertically fixed on the magnet mounting seat (4-1) respectively, the upper end of the guide rod (4-2) is matched with the bottom of the supporting frame (3-2) on the corresponding side in a sliding and guiding manner, the upper end of the adjusting screw rod (4-4) penetrates through a mounting hole at the bottom of the supporting frame (3-2) on the corresponding side and then is connected through an adjusting nut, the electromagnet (4-3) is fixedly installed at the bottom of the magnet mounting seat (4-1), the base (1) is made of ferromagnetic materials matched with the electromagnet (4-3) or is provided with a base (1) which corresponds to the position of the electromagnet (4-3) A ferromagnetic plate.
5. The caster rotation performance detection apparatus based on magnetic levitation technology as recited in any one of claims 1 to 4, wherein: the horizontal traction mechanism is a weight traction mechanism (9), the weight traction mechanism (9) comprises a lifting adjusting mechanism, pulleys (9-6) and weights (9-7), the pulleys (9-6) are installed on one side of the side frame (2) through the lifting adjusting mechanism, the traction rope (8) is connected with the weights (9-7) after bypassing the pulleys (9-6), and the horizontal tension of the caster (7) to be measured is adjusted by changing the weight of the weights (9-7).
6. The caster rotation performance detection apparatus based on magnetic levitation technology as recited in any one of claims 1 to 4, wherein: the horizontal traction mechanism is a motor traction mechanism (10), the motor traction mechanism (10) comprises a lifting adjusting mechanism, a pulley (10-6), a sheave (10-8) and a motor (10-9), the pulley (10-6) is installed on one side of the side frame (2) through the lifting adjusting mechanism, the motor (10-9) is installed on the side frame (2) through a motor installation seat (10-7), the sheave (10-8) is in transmission connection with an output shaft of the motor (10-9), the traction rope (8) is wound on the sheave (10-8) after bypassing the pulley (9-6), and the horizontal tension of the to-be-measured caster (7) is adjusted by controlling the output torque of the motor (10-9).
7. The method for detecting rotation performance of a magnetic suspension technology-based caster wheel of any one of claims 1 to 6, comprising the steps of:
s1, adjusting the height of a caster mounting seat (3-8) and the height position of an electromagnet loading mechanism (4) according to the size specification of a caster (7) to be tested, and then mounting the caster (7) to be tested on the caster mounting seat (3-8) to enable the suspension support frame (3) to be integrally suspended on the side frame (2) and be in no contact with the side frame (2) and the base (1);
s2, connecting the traction rope (8) with a horizontal traction mechanism, and adjusting the traction rope (8) to a horizontal position;
s3, starting the electromagnet loading mechanism (4), applying a downward acting force to the suspension support frame (3) by changing the magnitude of current to enable the caster (7) to be tested to be in contact with the base (1), and maintaining the constant current of the electromagnet loading mechanism (4) after the pressure value detected by the pressure sensor (5) reaches the rated load value W detected by the caster (7) to be tested;
s4, horizontally drawing the caster wheel (7) to be measured through the horizontal drawing mechanism, simultaneously detecting the magnitude of the drawing force by using the tension sensor (6), and measuring the minimum drawing force value F required by the rotation of the caster wheel (7) to be measured1；
S5, passing formula mu1＝F1The rotation resistance coefficient mu of the caster wheel (7) to be measured under rated load is calculated by the aid of the method1And judging whether the rotation performance of the caster (7) to be detected reaches the standard or not.
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