CN114526899B - Caster rotation performance detection equipment and detection method based on magnetic suspension technology - Google Patents
Caster rotation performance detection equipment and detection method based on magnetic suspension technology Download PDFInfo
- Publication number
- CN114526899B CN114526899B CN202210155771.2A CN202210155771A CN114526899B CN 114526899 B CN114526899 B CN 114526899B CN 202210155771 A CN202210155771 A CN 202210155771A CN 114526899 B CN114526899 B CN 114526899B
- Authority
- CN
- China
- Prior art keywords
- caster
- mounting seat
- tested
- side frame
- magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 94
- 238000001514 detection method Methods 0.000 title claims abstract description 77
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 37
- 238000005516 engineering process Methods 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 120
- 235000004443 Ricinus communis Nutrition 0.000 claims description 51
- 238000005339 levitation Methods 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 4
- 230000005294 ferromagnetic effect Effects 0.000 claims description 4
- 239000003302 ferromagnetic material Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000003028 elevating effect Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses equipment and a method for detecting rotation performance of casters based on a magnetic suspension technology, and belongs to the technical field of caster performance testing. The invention relates to a trundle rotation performance detection device, which comprises a base, a side frame, 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 name and opposite magnetic poles are arranged on the side frame and the suspension support frame, the stable suspension support of the suspension support frame for installing the trundle to be detected is realized by utilizing a magnetic suspension principle, and the non-contact load loading is realized by utilizing the electromagnet loading mechanism, so that the suspension support frame, the base and the side frame are in non-contact friction, the numerical value of the horizontal tension of the trundle obtained by detection 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 meets the standard, and the device 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 castor, in particular to a castor rotation performance detection device and a detection method based on a magnetic suspension technology.
Background
Casters are a collective term for casters, directional casters, and brake casters, and are very widely used in vehicles such as carts, trucks in workshops, and transport care beds. The data show that the degree of development of a city is often positively related to the amount of use of casters, that is, the more developed areas of industry, the higher the rate of use of casters.
Also, because casters have very wide application fields and usage scenarios, higher demands are also being placed on the various properties of casters. The national standard GB/T14687-2011 industrial casters and wheels makes mandatory requirements on various technical requirements and test methods of casters, and the requirements are that the hardness, overload capacity, wheel runout, caster braking force, steering braking force, horizontal force static pressure, vertical force static pressure, rotation performance, steering performance and walking performance of the casters are tested, so that casters produced and sold by enterprises meet various technical requirements. Wherein the rotation performance of the castor is represented by a rotation resistance coefficient mu of the castor under rated load 1 Characterized in that the caster or wheel is mounted on a caster rotation performance tester, a rated load W is applied to the caster or wheel along the plumb direction, and the wheel is mounted on the caster rotation performance testerThe axle is forced in the horizontal direction to measure the minimum value F required for rotating the castor or wheel 1 ，F 1 Namely the rotation resistance of the castor, mu 1 ＝F 1 /W。
Chinese patent No. ZL200920193783.4 discloses "a truckle rotation steering 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, the cover is equipped with the top board that can slide on the guide pillar above the platform, the platform below is equipped with the roof pressure loading device, the truckle can be invertd to the platform top, the upright truckle that corresponds with the truckle of inverting can be hung to the top board below, sticiss between upright truckle and the truckle of inverting is equipped with the friction arm-tie, friction arm-tie one side is equipped with the pulling force device, it has pulling force reading device to cluster between friction arm-tie and the pulling force device. During measurement, three trundle rotating shafts and steel wire ropes are vertically and inversely arranged in a lower mounting groove of a platform, three corresponding upright trundles are arranged in an upper mounting groove of an upper pressing plate, a friction pulling plate is arranged between the upper trundles and the lower trundles, a rated load W is applied to the trundles along the plumb direction by a hydraulic oil cylinder, the friction pulling plate is connected with the steel wire ropes, the steel wire ropes drive the friction pulling plate to apply force along the horizontal direction through a motor, a reading device connected in series with the steel wire ropes reads a reading F when the friction pulling plate is pulled, and a minimum value F required by rotating the trundles is measured 1 The rotation resistance of the caster is the rotation resistance of the caster.
However, the above patent application requires at least one set of upright casters and inverted casters to apply a rated load, and the measured force required for rotation of the casters is the force required for simultaneous rotation of the upright casters and the inverted casters, and the rotation resistance coefficient of a single caster under the rated load cannot be accurately represented, so that whether the rotation performance of the single caster meets the national standard cannot be ensured. In fact, the testing of the turning performance of individual casters is difficult because of the difficulty in stably supporting individual casters. The prior art can use a sliding guide bracket to support a single caster, but the sliding guide bracket inevitably has frictional resistance, and the measured rotational resistance of the caster contains frictional force required for overcoming the sliding of the bracket, thus resulting in inaccurate test data.
Disclosure of Invention
1. Technical problem to be solved by the invention
The invention aims to overcome the defect of inaccurate test data in the conventional caster rotation performance test device, and provides a caster rotation performance detection device and a detection method based on a magnetic suspension technology.
2. Technical proposal
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
the invention relates to caster rotation performance detection equipment based on a magnetic suspension technology, which comprises a base, side frames, a suspension supporting 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 on the base in parallel left and right, a middle channel is formed between the two groups of side frames, one side frame vertical magnet positioned at the top and one side frame lateral magnet positioned at the inner side of the middle channel are respectively arranged on the two groups of side frames, and the side frame vertical magnets and the side frame lateral magnets are horizontally arranged along the length direction of the middle channel; the suspension support frame comprises an upper bracket, a support frame and a middle mounting seat, wherein the support frame is vertically arranged on the left side and the right side of the upper bracket respectively, electromagnet loading mechanisms for applying plumb direction load to casters to be tested are arranged at the lower ends of the support frame on the two sides respectively, the middle mounting seat is fixedly arranged below the middle of the upper bracket and is positioned in a middle channel, vertical suspension magnets corresponding to the positions of side frame vertical magnets on the corresponding sides are respectively arranged on the left side and the right side of the upper bracket, lateral suspension magnets corresponding to the positions of side frame lateral magnets on the corresponding sides are respectively arranged on the left side and the right side of the middle mounting seat, and the side frame vertical magnets are opposite to the vertical suspension magnets, the side frame lateral magnets are opposite to the same-name magnetic poles of the lateral suspension magnets, so that the suspension support frame and the side frame keep a non-contact suspension state; the lower part of the middle mounting seat is provided with a trundle mounting seat for mounting the trundle to be tested, the upper part of the trundle mounting seat is provided with a pressure sensor for detecting rated load born by the trundle to be tested, the horizontal direction of the trundle mounting seat is provided with a tension sensor for detecting horizontal tension born by the trundle to be tested, and the tension sensor is connected with a horizontal traction mechanism through a traction rope horizontally arranged along the length direction of the middle channel.
Furthermore, the side frame vertical magnets and the side frame side magnets are bar-shaped track magnets formed by arranging a plurality of strong magnets; the vertical suspension magnet and the lateral suspension magnet are strong magnets.
Still further, the truckle mount pad be connected with middle mount pad through high adjustment mechanism, high adjustment mechanism include altitude mixture control pole and elevating socket, the altitude mixture control pole on vertical being fixed in the elevating socket, the altitude mixture control pole pass behind the mounting hole of middle mount pad bottom and connect through adjusting nut, pressure sensor locate between truckle mount pad and the elevating socket.
Still further, electro-magnet loading mechanism include magnet mount pad, guide bar, electro-magnet and adjusting screw, guide bar and adjusting screw vertical be fixed in on the magnet mount pad respectively, guide bar upper end and the braced frame bottom sliding guide cooperation of corresponding side, adjusting screw upper end pass and connect through adjusting nut behind the braced frame bottom mounting hole of corresponding side, electro-magnet fixed mounting in the bottom of magnet mount pad, the base adopt with electromagnet matched with ferromagnetic material preparation or be equipped with the ferromagnetic board corresponding with the electro-magnet position on the base.
Still further, horizontal traction mechanism be weight traction mechanism, weight traction mechanism include lift adjustment mechanism, pulley and weight, the pulley pass through lift adjustment mechanism and install in one side of side frame, haulage rope walk around the pulley and be connected with the weight, adjust the horizontal pulling force of the truckle that awaits measuring through changing weight.
Still further, horizontal traction mechanism be motor traction mechanism, motor traction mechanism include lift adjustment mechanism, pulley, sheave and motor, the pulley install in one side of side frame through lift adjustment mechanism, the motor install on the side frame through the motor mount pad, the sheave be connected with the output shaft transmission of motor, the haulage rope wind on the sheave after bypassing the pulley, the horizontal pulling force of the truckle that awaits measuring is adjusted through control motor output moment of torsion.
The invention discloses a detection method of caster rotation performance detection equipment based on a magnetic suspension technology, which comprises the following steps:
s1, adjusting the height of a castor mounting seat and the height position of an electromagnet loading mechanism according to the size specification of a castor to be tested, and then mounting the castor to be tested on the castor mounting seat to enable the suspension support frame to be suspended on the side frame integrally and to be in non-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 an electromagnet loading mechanism, applying downward acting force to the suspension support frame through changing the current, enabling the caster to be tested to be in 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 to be tested;
s4, horizontally pulling the trundle to be tested through the horizontal pulling mechanism, detecting the pulling force by using the pulling force sensor, and measuring the minimum pulling force value F required by rotation of the trundle to be tested 1 ；
S5, passing through the formula mu 1 ＝F 1 Calculating the rotation resisting coefficient mu of the caster to be tested under rated load 1 Judging whether the rotation performance of the caster to be tested meets the standard.
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 caster rotation performance detection equipment 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 at the inner side of a middle channel; the stable suspension support of the suspension support frame for mounting the casters to be tested is realized by utilizing a magnetic suspension principle, and the non-contact load loading is realized by utilizing the electromagnet loading mechanism, so that the suspension support frame, the base and the side frames are in non-contact friction, the numerical value of the horizontal tension born by the casters obtained by detection is more accurate, the rotation performance of the casters under the rated load can be accurately obtained, a reliable detection means is provided for whether the quality of the casters reaches the standard, and the detection 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 vertical magnets of the side frames and the lateral magnets of the side frames are bar-shaped track magnets formed by arranging a plurality of strong magnets, the vertical suspension magnets and the lateral suspension magnets are the strong magnets, and the bar-shaped track magnets are matched with the strong magnets, so that the magnetic field of a detection section is uniformly distributed, a stable suspension state can be ensured, the suspension support frame is enabled to move horizontally without resistance, and the stability and the accuracy of caster rotation performance detection are improved;
(3) The invention relates to a castor rotation performance detection device based on a magnetic suspension technology, wherein a castor 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 passes through a mounting hole at the bottom of the middle mounting seat and then is connected through an adjusting nut, and a pressure sensor is arranged between the castor mounting seat and the lifting seat; the height adjustment mechanism is utilized to adjust the height of the casters with different sizes, so that the suspension support frame can be kept in a stable suspension state, the electromagnet loading mechanism can be used for carrying out contactless caster load loading stably, and the detection equipment can meet the detection of the rotation performance of casters with various sizes and types;
(4) The invention relates to castor rotation performance detection equipment based on a magnetic suspension technology, wherein an electromagnet loading mechanism comprises a magnet mounting seat, a guide rod, an electromagnet and an adjusting screw, the height of the electromagnet can be adjusted through the adjusting screw, the electromagnet can carry out load loading in a non-contact manner, the structural design is simple, and the load size is convenient and accurate to control;
(5) The invention relates to a castor rotation performance detection device based on a magnetic suspension technology, wherein a weight traction mechanism is adopted as a horizontal traction mechanism, the weight traction mechanism comprises a lifting adjustment mechanism, a pulley and a weight, the pulley is arranged on one side of a side frame through the lifting adjustment mechanism, a traction rope is connected with the weight after bypassing the pulley, and the horizontal tension of a castor to be detected is adjusted by changing the weight of the weight;
(6) The invention relates to castor rotation performance detection equipment based on a 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 bypassing the pulley, the horizontal tension of a castor to be detected is adjusted by controlling the output torque of the motor, and the motor traction mechanism is adopted, so that the castor rotation performance detection equipment is beneficialThe horizontal pulling force of the trundles can be controlled by using the torque output by the motor, the applied pulling force is simpler and more convenient to control, and the minimum pulling force value F required by the rotation of the trundles is calculated 1 The detection of (2) is more accurate;
(7) According to the detection method of the caster rotation performance detection equipment based on the magnetic suspension technology, the casters are easy and convenient to install on the detection equipment, the loads in the plumb direction of the casters are convenient to load, the load is accurately controlled, the horizontal tension of the casters is simple and convenient to control, the pressure sensor and the tension sensor can be used for accurately obtaining relevant detection data, the detection operation is simpler and easier, and the detection data are accurate.
Drawings
Fig. 1 is a schematic structural diagram of a caster rotation performance detecting apparatus based on a 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 diagram of the matching structure of the electromagnet loading mechanism and the 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 detecting apparatus based on a magnetic levitation technology according to embodiment 2 of the present invention;
fig. 6 is a schematic diagram 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 diagram of a motor traction mechanism in embodiment 2 of the present invention.
Reference numerals in the schematic drawings illustrate:
1. a base; 1-1, supporting legs; 2. a side frame; 2a, an intermediate channel; 2-1, a side frame vertical magnet; 2-2, side frame side magnets; 3. a suspension support; 3-1, upper bracket; 3-2, supporting the frame; 3-3, a middle mounting seat; 3-4, vertical suspension magnets; 3-5, laterally suspending the magnet; 3-6, a height adjusting rod; 3-7, lifting seat; 3-8, a castor mounting seat; 4. an electromagnet loading mechanism; 4-1, a magnet mounting seat; 4-2, a guide rod; 4-3, electromagnet; 4-4, adjusting a screw; 5. a pressure sensor; 6. a tension sensor; 7. casters to be tested; 8. a traction rope; 9. weight traction mechanism; 9-1, lifting guide rods; 9-2, sliding the seat plate; 9-3, lifting the screw rod; 9-4, a screw rod nut; 9-5, a hand wheel; 9-6, pulleys; 9-7, weight; 10. a motor traction mechanism; 10-1, lifting guide rods; 10-2, sliding the seat plate; 10-3, lifting the screw rod; 10-4, a screw rod nut; 10-5, a hand wheel; 10-6, pulleys; 10-7, a motor mounting seat; 10-8, grooved wheels; 10-9, a motor.
Detailed Description
For a further understanding of the present invention, the present invention will be described in detail with reference to the drawings and examples.
Example 1
Referring to fig. 1 to 4, the caster rotation performance detection apparatus based on the magnetic levitation technology of this embodiment includes a base 1, a side frame 2, a levitation supporting 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 supporting leg 1-1, the height of the supporting leg 1-1 is adjustable so as to ensure that the base 1 is in a horizontal state, the side frame 2 is a rectangular frame structure, two groups of side frames 2 are arranged in parallel left and right on the base 1, and a middle channel 2a is formed between the two groups of side frames 2, the middle channel 2a is used for mounting 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 at 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 horizontally arranged along the length direction of the middle channel 2 a; the suspension support frame 3 comprises an upper bracket 3-1, a support frame 3-2 and a middle mounting seat 3-3, wherein the support frame 3-2 is vertically arranged on the left side and the right side of the upper bracket 3-1 respectively, the lower ends of the support frames 3-2 on the two sides are respectively provided with an electromagnet loading mechanism 4 for applying plumb direction load to the casters 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 a side frame vertical magnet 2-1 on 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 a side frame vertical magnet 2-2 on the corresponding side, the side frame vertical magnet 2-1 is opposite to the vertical suspension magnet 3-4, the side frame vertical magnet 2-5 on the side is opposite to the same-name magnetic poles of 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 upper and lower suspension state, the side frame 2-side is in a suspension state, the side frame side and the side frame side 2-side is in a suspension state and the suspension state is kept in a suspension state. The lower part of the middle mounting seat 3-3 is provided with a trundle mounting seat 3-8 for mounting the trundle 7 to be tested, the trundle mounting seat 3-8 is used for quickly mounting and dismounting the trundle 7 to be tested, and for convenience in illustration, only the trundle 7 to be tested is replaced by a roller in the drawing for illustration, and a frame body of the trundle 7 to be tested can be fixed on the trundle mounting seat 3-8 by adopting a screw. The pressure sensor 5 for detecting rated load borne by the caster 7 to be detected is arranged above the caster mounting seat 3-8, the tension sensor 6 for detecting horizontal tension borne by the caster 7 to be detected is arranged in the horizontal direction of the caster mounting seat 3-8, and the tension sensor 6 is connected with the horizontal traction mechanism through a traction rope 8 horizontally arranged along the length direction of the middle channel 2 a. The caster 7 to be tested is arranged on a caster mounting seat 3-8 at the bottom of the middle mounting seat 3-3, the electromagnet loading mechanism 4 is used for applying plumb load to the caster 7 to be tested, the load is detected by the pressure sensor 5, the horizontal traction mechanism carries out horizontal traction on the caster 7 to be tested through the traction rope 8, the traction force is detected by the tension sensor 6, and the minimum tension of the horizontal traction mechanism for driving the caster 7 to be tested to rotate is the rotation resistance of the caster under the rated load applied by the electromagnet loading mechanism 4. The stable suspension support of the suspension support frame for installing the casters to be tested is realized by utilizing the magnetic suspension principle, and the non-contact load loading is realized by utilizing the electromagnet loading mechanism, so that the non-contact friction between the suspension support frame and the base and between the suspension support frame and the side frame is realized, the numerical value of the horizontal tension of the detected casters is more accurate, the rotation performance of the casters under the rated load can be accurately obtained, a reliable detection means is provided for whether the quality of the casters meets the standard, and the detection device has the advantages of simple structure, accurate detection data, simplicity and convenience in operation and the like.
As shown in fig. 2, in this embodiment, the side frame vertical magnet 2-1 and the side frame side magnet 2-2 are each a bar-shaped rail magnet formed by arranging a plurality of strong magnets; the vertical suspension magnet 3-4 and the lateral suspension magnet 3-5 are strong magnets. The lengths of the side frame vertical magnet 2-1 and the side frame side magnet 2-2 are larger than the effective stroke of the caster detection test, and the strip-shaped track magnet is matched with the strong magnet, so that the magnetic field of the detection section is uniformly distributed, a stable suspension state can be ensured, the suspension support frame 3 horizontally moves without resistance, and the stability and the accuracy of caster rotation performance detection are improved.
As shown in fig. 3 and 4, in order to adapt to the requirements of rotation performance tests of casters of different specifications and types, in this embodiment, the caster mounting seat 3-8 is connected with the middle mounting seat 3-3 through a height adjusting mechanism, the height adjusting mechanism includes 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 passes through a mounting hole at the bottom of the middle mounting seat 3-3 and then is connected through adjusting nuts, two adjusting nuts are arranged on the height adjusting rod 3-6, a mounting plate at the bottom of the middle mounting seat 3-3 is clamped between the upper adjusting nut and the lower adjusting nut, free adjustment of the height of the lifting seat 3-7 can be achieved through the adjusting nuts, the height adjustment can be carried out by using the height adjusting mechanism according to casters of different specifications, the suspension support frame 3 can be kept in a stable suspension state, and the electromagnet loading mechanism 4 can stably carry out non-contact caster load loading, so that the detection device can meet the rotation performance detection of casters of various specifications and types. The pressure sensor 5 is arranged between the caster mounting seat 3-8 and the lifting seat 3-7, so that the plumb load of the caster 7 to be measured can be reflected. In order to ensure stable installation of the lifting seat 3-7, two groups of height adjusting rods 3-6 can be arranged at two ends of the lifting seat 3-7 so as to prevent the caster 7 to be tested from tilting.
In this embodiment, as shown in fig. 3 and fig. 4, 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, where the guide rod 4-2 and the adjusting screw 4-4 are vertically fixed on the magnet mounting seat 4-1 respectively, the upper end of the guide rod 4-2 is slidably and guided with the bottom of the supporting frame 3-2 on the corresponding side, the guide rod 4-2 may be provided with two groups for up-and-down adjusting and guiding the magnet mounting seat 4-1, the upper end of the adjusting screw 4-4 passes through the bottom mounting hole of the supporting frame 3-2 on the corresponding side and then is connected by adjusting nuts, the adjusting nuts are also provided with two pieces on the adjusting screw 4-4, the bottom rod of the supporting frame 3-2 is clamped between the two adjusting nuts, and the height of the adjusting screw 4-4 is adjusted by the adjusting nuts, so as to adjust the height position of the electromagnet 4-3, realize load loading of the electromagnet without contact, the structure design is simple, and the load size control is convenient and accurate; the electromagnets 4-3 are fixedly arranged at the bottom of the magnet mounting seat 4-1, the electromagnets 4-3 are preferably provided with two electromagnets, the base 1 is made of ferromagnetic materials matched with the electromagnets 4-3 or ferromagnetic plates corresponding to the electromagnets 4-3 are arranged on the base 1. After the electromagnet 4-3 is electrified, the electromagnet 4-3 magnetizes and generates suction force with the base 1 or a ferromagnetic plate on the base 1, and the suction force can be changed by adjusting the current of the electromagnet 4-3, so that the plumb load applied to the caster 7 to be tested is changed. By means of the electromagnet loading mechanism 4, plumb load is generated, meanwhile, the electromagnet 4-3 is not contacted with the base 1 or the side frame 2, and therefore resistance interference in the horizontal direction does not exist.
Further, as shown in fig. 3, the above-mentioned 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 that the traction rope 8 keeps horizontal, the traction rope 8 bypasses the pulley 9-6 and is connected with the weight 9-7, and the horizontal tension of the caster 7 to be measured is adjusted by changing the weight of the weight 9-7. The weight traction mechanism 9 is adopted, 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 nut 9-4 and a hand wheel 9-5, wherein the lifting guide rod 9-1 is vertically arranged on 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 is in threaded fit with the screw 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 then the pulley 9-6 is controlled to move up and down so that the traction rope 8 is kept in a horizontal state.
The detection method of the caster rotation performance detection device based on the magnetic levitation technology of the embodiment comprises the following steps:
s1, adjusting the height of a castor mounting seat 3-8 and the height position of an electromagnet loading mechanism 4 according to the size specification of a castor 7 to be tested, and then mounting the castor 7 to be tested on the castor mounting seat 3-8 to enable a suspension support frame 3 to be suspended on a side frame 2 integrally and to be in non-contact with the side frame 2 and a base 1; the castor 7 to be tested can be contacted with the base 1 or slightly suspended, and the suspension support frame 3 and the castor 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 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 used for applying a plumb load to the castor 7 to be tested, and only the castor 7 to be tested is contacted with the base 1 at the moment, and the suspension support frame 3 and the electromagnet loading mechanism 4 are not contacted with the base 1 or the side frame 2;
s4, horizontally pulling the castor 7 to be tested through the horizontal pulling mechanism, detecting the pulling force by using the pulling force sensor 6, and detecting the minimum pulling force value F required by rotation of the castor 7 to be tested 1 The method comprises the steps of carrying out a first treatment on the surface of the Namely, by replacing or adding the weights 9-7 and increasing the pulling force value of the pulling rope 8, when the caster wheel 7 to be tested starts to rotate and rotates for at least one half circle, the value detected by the pulling force sensor 6 at the moment is taken as the minimum pulling force value F 1 ；
S5, passing through the formula mu 1 ＝F 1 Calculating the rotation resisting coefficient mu of the castor 7 to be tested under rated load 1 And a prescribed resistance coefficient mu 1 Comparing and judgingWhether the rotation performance of the caster 7 to be tested meets the standard or not.
By adopting the trundle rotation performance detection equipment and the trundle rotation performance detection method, the trundle is simple and convenient to install on the detection equipment, the load in the direction of the trundle plumb is convenient to load, the load is accurate to control, the trundle horizontal tension is simple and convenient to control, and related detection data can be accurately obtained by utilizing the pressure sensor and the tension sensor, so that the detection operation is simpler and easier, and the detection data is accurate.
Example 2
Referring to fig. 5 to 7, a caster rotation performance detecting apparatus based on a magnetic levitation technology of the present embodiment is the same as embodiment 1 in basic structure and operation principle, and is different in 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 so as 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 is wound on the sheave 10-8 after bypassing the pulley 9-6, and the horizontal tension of the caster 7 to be tested is adjusted by controlling the output torque of the motor 10-9. The motor traction mechanism 10 is adopted, the horizontal tension of the trundles can be controlled by utilizing the torque output by the motor 10-9, the applied tension is simpler and more convenient to control, and the minimum traction force value F required by the rotation of the trundles is realized 1 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 nut 10-4 and a hand wheel 10-5, wherein the lifting guide rod 10-1 is vertically arranged on one side of the side frame 2, the sliding seat plate 10-2 is slidably arranged on the lifting guide rod 10-1, a 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 nut 10-4 arranged at the top of the side frame 2, the hand wheel 10-5 is fixed at 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 the pulley 10-6 is further controlled to move up and down to keep the traction rope 8 in a horizontal stateThe traction force required by the rotation of the casters is more accurate.
The detection method of the caster rotation performance detection device based on the magnetic levitation technology of the embodiment comprises the following steps:
s1, adjusting the height of a castor mounting seat 3-8 and the height position of an electromagnet loading mechanism 4 according to the size specification of a castor 7 to be tested, and then mounting the castor 7 to be tested on the castor mounting seat 3-8 to enable a suspension support frame 3 to be suspended on a side frame 2 integrally and to be in non-contact with the side frame 2 and a base 1; the castor 7 to be tested can be contacted with the base 1 or slightly suspended, and the suspension support frame 3 and the castor 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 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 used for applying a plumb load to the castor 7 to be tested, and only the castor 7 to be tested is contacted with the base 1 at the moment, and the suspension support frame 3 and the electromagnet loading mechanism 4 are not contacted with the base 1 or the side frame 2;
s4, horizontally pulling the castor 7 to be tested through the horizontal pulling mechanism, detecting the pulling force by using the pulling force sensor 6, and detecting the minimum pulling force value F required by rotation of the castor 7 to be tested 1 The method comprises the steps of carrying out a first treatment on the surface of the Namely, the pulling force value of the pulling rope 8 is increased by controlling the torque output by the motor 10-9, and when the caster 7 to be tested starts to rotate and rotates for at least one half circle, the value detected by the pulling force sensor 6 at the moment is taken as the minimum pulling force value F 1 ；
S5, passing through the formula mu 1 ＝F 1 Calculating the rotation resisting coefficient mu of the castor 7 to be tested under rated load 1 And a prescribed resistance coefficient mu 1 And comparing, and judging whether the rotation performance of the castor 7 to be tested meets the standard.
By adopting the trundle rotation performance detection equipment and the trundle rotation performance detection method, the trundle is simple and convenient to install on the detection equipment, the load in the direction of the trundle plumb is convenient to load, the load is accurate to control, the trundle horizontal tension is simple and convenient to control, and related detection data can be accurately obtained by utilizing the pressure sensor and the tension sensor, so that the detection operation is simpler and easier, and the detection data is accurate.
According to the caster rotation performance detection equipment and the detection method based on the magnetic suspension technology, the stable suspension support of the suspension support frame for installing the caster to be detected is realized by utilizing the magnetic suspension principle, and the non-contact load loading is realized by utilizing the electromagnet loading mechanism, so that the suspension support frame, the base and the side frames are free from contact friction, the numerical value of the horizontal tension of the detected caster is more accurate, the rotation performance of the caster under the rated load can be accurately obtained, a reliable detection means is provided for whether the quality of the caster meets the standard, and the detection equipment has the advantages of simple structure, accurate detection data, simplicity and convenience in operation and the like.
It will be understood that when an element is referred to as being "fixed 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 are used herein for illustrative purposes only and are not meant to be the only embodiment.
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 invention and its embodiments have been described above schematically, without limitation, and the actual construction is not limited to this, as it is shown in the drawings, which are only one of the embodiments of the invention. Therefore, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical scheme are not creatively devised without departing from the gist of the present invention, and all the structural manners and the embodiments belong to the protection scope of the present invention.
Claims (7)
1. Caster rotation performance detection equipment based on magnetic suspension technology, its characterized in that: the device comprises a base (1), side frames (2), a suspension supporting 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 the side frames (2) are arranged on the base (1) in parallel left and right, a middle channel (2 a) is formed between the two groups of side frames (2), 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 side magnet (2-2) positioned at the inner side of the middle channel (2 a), and the side frame vertical magnets (2-1) and the side frame side magnets (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), a support frame (3-2) and a middle mounting seat (3-3), wherein the support frame (3-2) is vertically arranged on the left side and the right side of the upper bracket (3-1) respectively, the lower ends of the support frame (3-2) on two sides are respectively provided with an electromagnet loading mechanism (4) for applying plumb directional 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 (2 a), 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 a side frame vertical magnet (2-1) on 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 side frame lateral magnet (2-2) on the corresponding side, the side frame (2-1) and the vertical magnet (2-5) are opposite to the lateral suspension magnet (2-5) on the side of the side frame (2-1), the suspension support frame (3) and the side frame (2) are kept in a non-contact suspension state; the lower part of the middle mounting seat (3-3) is provided with a trundle mounting seat (3-8) for mounting the trundle (7) to be tested, the upper part of the trundle mounting seat (3-8) is provided with a pressure sensor (5) for detecting rated load borne by the trundle (7) to be tested, the horizontal direction of the trundle mounting seat (3-8) is provided with a tension sensor (6) for detecting horizontal tension borne by the trundle (7) to be tested, 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 caster turning performance detection apparatus based on the magnetic levitation technology as set forth in claim 1, wherein: the side frame vertical magnets (2-1) and the side frame side magnets (2-2) are bar-shaped rail magnets formed by arranging a plurality of strong magnets; the vertical suspension magnet (3-4) and the lateral suspension magnet (3-5) are strong magnets.
3. The caster turning performance detection apparatus based on the magnetic levitation technology as set forth in claim 1, wherein: the caster 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 at 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 mounting seat (3-8) and the lifting seat (3-7).
4. The caster turning performance detection apparatus based on the magnetic levitation technology as set forth 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 (4-4), wherein the guide rod (4-2) and the adjusting screw (4-4) are vertically fixed on the magnet mounting seat (4-1) respectively, the upper end of the guide rod (4-2) is in sliding guide fit with the bottom of a supporting frame (3-2) on the corresponding side, the upper end of the adjusting screw (4-4) passes through a mounting hole on 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 mounted at the bottom of the magnet mounting seat (4-1), and the base (1) is made of ferromagnetic materials matched with the electromagnet (4-3) or a ferromagnetic plate corresponding to the position of the electromagnet (4-3) is arranged on the base (1).
5. The caster turning performance detection apparatus based on the magnetic levitation technology according to 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, a pulley (9-6) and a weight (9-7), the pulley (9-6) is arranged on one side of the side frame (2) through the lifting adjusting mechanism, a traction rope (8) is connected with the weight (9-7) after bypassing 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).
6. The caster turning performance detection apparatus based on the magnetic levitation technology according to 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 grooved pulley (10-8) and a motor (10-9), the pulley (10-6) is arranged on one side of the side frame (2) through the lifting adjusting mechanism, the motor (10-9) is arranged on the side frame (2) through a motor mounting seat (10-7), the grooved pulley (10-8) is in transmission connection with an output shaft of the motor (10-9), and the traction rope (8) winds on the grooved pulley (10-8) after bypassing the pulley (9-6) and adjusts the horizontal tension of the caster (7) to be tested by controlling the output torque of the motor (10-9).
7. A detection method of the caster turning performance detection apparatus based on the magnetic levitation technology as set forth in any one of claims 1 to 6, characterized by comprising the steps of:
s1, adjusting the height of a castor mounting seat (3-8) and the height position of an electromagnet loading mechanism (4) according to the size specification of a castor (7) to be tested, and then mounting the castor (7) to be tested on the castor mounting seat (3-8) to enable a suspension support frame (3) to be suspended on a side frame (2) integrally and to be in non-contact with the side frame (2) and a 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 an electromagnet loading mechanism (4), applying downward acting force to the suspension support frame (3) by changing the current, enabling the caster wheel (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 wheel (7) to be tested;
s4, horizontally pulling the castor (7) to be tested through the horizontal pulling mechanism, detecting the pulling force by using the pulling force sensor (6), and detecting the minimum pulling force value F required by rotation of the castor (7) to be tested 1 ；
S5, passing through the formula mu 1 ＝F 1 Calculating the rotation resisting coefficient mu of the castor (7) to be tested under the rated load 1 Judging whether the rotation performance of the castor (7) to be tested meets the standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210155771.2A CN114526899B (en) | 2022-02-21 | 2022-02-21 | Caster rotation performance detection equipment and detection method based on magnetic suspension technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210155771.2A CN114526899B (en) | 2022-02-21 | 2022-02-21 | Caster rotation performance detection equipment and detection method based on magnetic suspension technology |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114526899A CN114526899A (en) | 2022-05-24 |
| CN114526899B true CN114526899B (en) | 2024-01-09 |
Family
ID=81624826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210155771.2A Active CN114526899B (en) | 2022-02-21 | 2022-02-21 | Caster rotation performance detection equipment and detection method based on magnetic suspension technology |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114526899B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100053334A (en) * | 2008-11-12 | 2010-05-20 | 주식회사 창공주차산업 | The rotary parking apparatus with greater accuracy of operation |
| CN201497627U (en) * | 2009-08-26 | 2010-06-02 | 广东省中山市质量计量监督检测所 | Rotation and steering performance tester of foot wheel |
| CN103698128A (en) * | 2013-12-23 | 2014-04-02 | 武汉理工大学 | Large-air gap mixed magnetic bearing performance testing device |
| KR101747707B1 (en) * | 2016-10-28 | 2017-06-15 | 대동이앤티(주) | Trailer for Inspecting and Maintaining Maglev Rail |
| JP2018197163A (en) * | 2017-05-25 | 2018-12-13 | 株式会社プロスパイン | Magnetic floating carrying device |
| CN109883735A (en) * | 2019-03-11 | 2019-06-14 | 中国科学院力学研究所 | The experimental rig that levitation train vibrates under the conditions of a kind of analog aerodynamic force |
-
2022
- 2022-02-21 CN CN202210155771.2A patent/CN114526899B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100053334A (en) * | 2008-11-12 | 2010-05-20 | 주식회사 창공주차산업 | The rotary parking apparatus with greater accuracy of operation |
| CN201497627U (en) * | 2009-08-26 | 2010-06-02 | 广东省中山市质量计量监督检测所 | Rotation and steering performance tester of foot wheel |
| CN103698128A (en) * | 2013-12-23 | 2014-04-02 | 武汉理工大学 | Large-air gap mixed magnetic bearing performance testing device |
| KR101747707B1 (en) * | 2016-10-28 | 2017-06-15 | 대동이앤티(주) | Trailer for Inspecting and Maintaining Maglev Rail |
| JP2018197163A (en) * | 2017-05-25 | 2018-12-13 | 株式会社プロスパイン | Magnetic floating carrying device |
| CN109883735A (en) * | 2019-03-11 | 2019-06-14 | 中国科学院力学研究所 | The experimental rig that levitation train vibrates under the conditions of a kind of analog aerodynamic force |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114526899A (en) | 2022-05-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203323992U (en) | A two-dimension measurement mechanism for hydrodynamic performances of a seaworthiness water surface model | |
| CN202671121U (en) | Four guide rod supporting lifting device for stepping motor type steel wire horizontal displacement meter | |
| CN104697693B (en) | Carrier roller rotation resistance measuring device | |
| CN102627207B (en) | Device for detecting equilibrium coefficient of elevator and detecting method | |
| CN112683549B (en) | Automatic drive car road surface condition analogue test platform | |
| CN111896238A (en) | Control surface clearance measuring device | |
| CN114526899B (en) | Caster rotation performance detection equipment and detection method based on magnetic suspension technology | |
| CN112098022A (en) | Device for static and dynamic load test of bridge model, control method and application | |
| CN207396059U (en) | A kind of automobile brake experimental bench lifting device with speed measuring drum | |
| CN202024895U (en) | Roller assembly with two-way adjustable wheelbase | |
| CN113218576A (en) | Device and method for detecting rotational inertia of large-scale shaft part | |
| CN207000475U (en) | Single track gauge detection means | |
| CN207020013U (en) | Agricultural V bands fatigue tester | |
| JP2013018644A (en) | Traction capacity test apparatus | |
| CN209993197U (en) | Friction comprehensive experiment device | |
| CN218865522U (en) | Indoor tire braking performance testing device | |
| CN112229649A (en) | Automobile inertia simulation experiment table with table body capable of lifting in balance and adjustable wheelbase | |
| CN107727413B (en) | Automobile brake experiment table lifting device with speed measuring roller | |
| JPH04106456A (en) | Friction tester | |
| CN219298171U (en) | Composite foundation static load test detection device | |
| CN201476970U (en) | Suspension-loading test platform | |
| CN111302174A (en) | Elevator balance coefficient and elevator static traction test no-load detection method and detection device | |
| CN113588543B (en) | Self-lifting controller for wheel type high-speed anti-skid instrument | |
| CN219567346U (en) | Rated load measuring system for bridge type hoisting machinery | |
| CN117405419B (en) | Fixed tire test bench |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |