CN112610570B - Mechanical magnetic type quick-dismantling structure of material friction abnormal sound test bed - Google Patents
Mechanical magnetic type quick-dismantling structure of material friction abnormal sound test bed Download PDFInfo
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- CN112610570B CN112610570B CN202011375082.XA CN202011375082A CN112610570B CN 112610570 B CN112610570 B CN 112610570B CN 202011375082 A CN202011375082 A CN 202011375082A CN 112610570 B CN112610570 B CN 112610570B
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- 239000000463 material Substances 0.000 title claims abstract description 35
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 230000002159 abnormal effect Effects 0.000 title claims abstract description 28
- 230000006835 compression Effects 0.000 claims abstract description 17
- 238000007906 compression Methods 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 230000000670 limiting effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 9
- 239000010720 hydraulic oil Substances 0.000 description 6
- 230000005484 gravity Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/02—Measuring coefficient of friction between materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/83—Use of a magnetic material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/99—Fasteners with means for avoiding incorrect assembly or positioning
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- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention belongs to the technical field of friction abnormal sound experimental equipment, and particularly relates to a mechanical magnetic quick-dismantling structure of a material friction abnormal sound test bed, which comprises a base and a compression bar, wherein a magnetic attraction block is rotationally connected to the lower part of the base and is provided with a driving mechanism for driving the magnetic attraction block to rotate; the base is provided with a first magnet which can attract one magnetic pole of the attracting magnet, and the pressing rod is provided with a second magnet which can attract the other magnetic pole of the attracting magnet. In the scheme, the pressing rod is fixed by utilizing the magnetic attraction effect, and only the pressing rod is required to be attracted on the base when the pressing rod is installed; when the pressure lever is required to be separated from the base, only the position of the magnetic attraction block is required to be changed, the attraction force between the attraction magnet and the first magnet and the attraction force between the attraction magnet and the second magnet are converted into repulsive force, the installation and the disassembly are simple, and the test material on the friction abnormal sound test bed is convenient for the test personnel to quickly replace.
Description
Technical Field
The invention belongs to the technical field of friction abnormal sound experimental equipment, and particularly relates to a mechanical magnetic type quick-dismantling structure of a material friction abnormal sound test bed.
Background
Automobile abnormal sound is a sound generated by collision or friction of two materials, and is almost the most alarming and intolerable problem of all consumers. Abnormal sound of a vehicle can not be completely avoided almost, wherein the abnormal sound caused by friction is a common abnormal sound problem which is difficult to solve by an automobile, and the friction coefficient between sample pieces can be tested through the abnormal sound friction test bed, so that the generation position of the abnormal sound of the automobile is predicted in advance, and the sound is eliminated or reduced from the root. During testing, certain pressure is applied to the two materials vertically through the vertical force application mechanism, reciprocating friction movement of the two materials according to a set rule is realized through the actuating device in the horizontal direction, and the measurement of friction coefficient is realized.
The existing vertical force application mechanism comprises a motor, a pressing rod, a pressing head fixed at the lower end of the pressing rod, a screw rod driven by the motor and a base moving along the screw rod, wherein the pressing rod is arranged on the base, and the base, the pressing rod and the pressing head can slide along the screw rod through rotation of the motor. When the automobile materials are required to be subjected to friction test, the materials A are placed on a test bed, the materials B are fixed on the lower surface of a pressure head, the materials A are driven to reciprocate by an actuating device, and downward acting force is applied to the materials B and the materials A by operating a motor. When carrying out friction test to different materials, need change different materials, when changing material B of pressure head lower surface, need dismantle the depression bar from the base earlier, then change, install the depression bar again on the base after changing. The existing vertical force application mechanism has the problems that a pressing rod and a base are connected together through fasteners such as bolts, the bolts are required to be continuously screwed when the pressing rod is dismounted and mounted, the operation is more troublesome, a friction abnormal sound test table is a special friction test mechanism, different materials are required to be frequently tested, the pressing rod and the base are also required to be dismounted and mounted frequently, screw thread sliding is easy to cause, and the connection between the pressing rod and the base fails.
Disclosure of Invention
The invention aims to provide a mechanical magnetic type quick-dismantling structure of a material friction abnormal sound test bed, which aims to solve the problem of troublesome installation and dismantling between a compression bar and a base.
In order to achieve the above purpose, the scheme of the invention is as follows: the mechanical magnetic quick-release structure of the material friction abnormal sound test bed comprises a base and a compression bar, wherein a magnetic attraction block is rotationally connected to the lower part of the base, and a driving mechanism for driving the magnetic attraction block to rotate is arranged on the lower part of the base; the base is provided with a first magnet which can attract one magnetic pole of the attracting magnet, and the pressing rod is provided with a second magnet which can attract the other magnetic pole of the attracting magnet.
The working principle and the beneficial effects of the scheme are as follows:
when the pressing rod is connected with the base, the magnetic attraction block is driven to rotate through the driving mechanism, so that the magnetic pole attracted with the first magnet in the attraction magnet is positioned right above the magnetic attraction block and is attracted with the first magnet, the other magnetic pole of the attraction magnet is positioned right below the magnetic attraction block, one side of the pressing rod provided with the second magnet is close to the lower side of the magnetic attraction block, and the pressing rod is connected onto the base under the attraction effect of the other magnetic pole of the attraction magnet. When the compression bar is required to be disassembled to replace new materials, the magnetic attraction block is rotated through the driving mechanism, so that the magnetic pole originally positioned above is rotated to the lower part, and the magnetic pole originally positioned below is rotated to the upper part, at the moment, the compression bar can be automatically separated from the base under the repulsive force of the attraction magnet and the second magnet and under the self gravity action of the compression bar.
In the scheme, the pressing rod is fixed by utilizing the magnetic attraction effect, and only the pressing rod is required to be attracted on the base when the pressing rod is installed, so that the installation is convenient; when the pressure lever is required to be separated from the base, only the position of the magnetic attraction block is required to be changed, the attractive force between the attraction magnet and the first magnet and the attractive force between the attraction magnet and the second magnet are converted into repulsive force, the disassembly operation is simple, the test material on the friction abnormal sound test bed is convenient for the tester to quickly replace, and the smooth performance of the friction abnormal sound test is ensured.
Optionally, the magnetic block is a cylinder, a concave cavity communicated with the outside is formed in the base, the magnetic block is rotationally connected in the concave cavity, and the lower part of the magnetic block extends out of the concave cavity; the length of the magnetic attraction block extending out of the concave cavity is 1/3-1/5 of the whole height of the magnetic attraction block. The lower part of the magnetic block extends out of the concave cavity, and when the pressure lever is required to be connected with the base, the positioning between the pressure lever and the base is easier.
Optionally, a connecting seat is arranged on the pressure rod, a groove which can be matched with the lower part of the magnetic block is formed in the connecting seat, and the second magnet is arranged on the connecting seat and positioned below the groove. When the pressure lever is connected with the base, the groove is aligned with the lower part of the magnetic block, so that the pressure lever and the base can be rapidly positioned.
Optionally, the driving mechanism comprises a driving gear and a driven gear which are both rotatably connected to the base, and the driving gear is meshed with the driven gear; a connecting shaft is connected between the driven gear and the magnetic attraction block; the driving gear is fixed with a rotating block extending out of the base, and the rotating block is provided with a positioning part. When the magnetic attraction block is required to be rotated, the rotating block is screwed, the driving gear is driven to rotate through the rotating block, the magnetic attraction block is driven to rotate together through the driven gear when the driving gear rotates, and when the magnetic attraction block rotates to a required position, the rotating block is stopped from being screwed and fixed through the positioning part, so that the magnetic attraction block can be rotated and fixed.
Optionally, the positioning part comprises a positioning piece and a through hole formed in the rotating block, a clamping groove capable of being opposite to the through hole is formed in the base, and a third magnet is fixed in the clamping groove; the locating piece sliding connection is on the through-hole and can stretch into the draw-in groove, and one side that the locating piece is close to the draw-in groove is fixed with the fourth magnet that can inhale with the third magnet mutually, and one side that the locating piece kept away from the draw-in groove is fixed with the lug that length is greater than the through-hole diameter. When the rotation of the driving gear is required to be limited, the positioning piece stretches into the clamping groove, at the moment, the third magnet and the fourth magnet are attracted to each other, the positioning piece can be well fixed in the clamping groove, and the rotating block and the driving gear cannot rotate at will under the limitation of the positioning piece. When the driving gear is required to rotate, acting force is applied to the protruding block, so that the positioning piece is separated from the clamping groove, and the rotating block can rotate freely due to the fact that the limiting effect of the positioning piece is not achieved, and the driving gear can be driven to rotate through the rotating block.
Optionally, the transmission ratio of the driving gear to the driven gear is 1:1, 2 clamping grooves are formed in the base, and each time the rotating block rotates 180 degrees, the through hole can be opposite to one of the clamping grooves. The transmission ratio of the driving gear and the driven gear is controlled, so that the positions of the two magnetic poles of the attraction magnet can be changed every time the driving gear rotates by a fixed angle (180 degrees). After the rotating block rotates 180 degrees, the locating piece can extend into one of the clamping grooves, and at the moment, the rotating block cannot continue to rotate, so that the rotating angle of the rotating block is prevented from being inconsistent with the requirements.
Optionally, a first slideway is arranged on the base, a second slideway is arranged on the connecting seat, the first magnet slides and is connected in the first slideway in a sealing way, and the second magnet slides and is connected in the second slideway in a sealing way; the second slide way is internally and slidably connected with a second piston in a sealing way and is provided with an elastic piece for resetting the second piston; the first slide way is internally and slidably connected with a first piston and a first rack meshed with the driving gear in a sealing manner, the first piston is fixed on the upper part of the first rack, and the lower part of the first rack can extend into the second slide way and be in contact with the second piston; when the locating piece stretches into one of the clamping grooves, the first magnet and the second magnet are opposite to the attracting magnet and attract each other.
When the connecting seat and the pressure bar on the connecting seat are connected with the base, the positioning piece stretches into the corresponding side clamping groove, so that the first magnet and the second magnet are ensured to be positioned at one side far away from the magnetic attraction block. The connecting seat is correspondingly matched with the connecting seat, so that the first rack is opposite to the second slide way. The rotating block is screwed in the fixed direction, the driving gear is driven to rotate through the rotating block, and the magnetic attraction block is driven to rotate together through the driven gear when the driving gear rotates. After the rotating block rotates 180 degrees, the magnetic pole below the attracting magnet can attract the second magnet, and the magnetic pole above and below the attracting magnet can attract the first magnet; and the positioning piece is opposite to the other clamping groove, and under the attraction of the third magnet, the fourth magnet and the positioning piece on the fourth magnet extend into the clamping groove, and the rotating block, the driving gear and the magnetic attraction block are fixed and cannot rotate at will. In the rotating process of the rotating block, the first piston moves, the first magnet gradually moves leftwards under the transmission action of hydraulic oil of the first slideway, and finally is positioned right above the attracting magnet and is attracted with the upper magnetic pole of the attracting magnet mutually; simultaneously, the first rack applies downward acting force to the second piston to enable the second piston to descend, the spring is compressed, the second magnet gradually ascends and gets closer to the attracting magnet under the transmission action of hydraulic oil of the second slideway, the second magnet and the lower magnetic pole of the attracting magnet are attracted mutually, and the connecting seat can be well connected to the base under the action of the attraction force. When new materials need to be removed from the connecting seat and the compression bar, acting force is applied to the bulge, the positioning piece is separated from the clamping groove, then the rotating block rotates clockwise by 180 degrees, in the clockwise rotating process of the rotating block, the first magnet and the second magnet are gradually far away from the attracting magnet, the rotating block is difficult to rotate due to overlarge mutual attraction between the first magnet and the attracting magnet and between the second magnet and the attracting magnet, after the rotating is completed, the attracting magnet is far away from a magnetic pole originally located above and rotates to the lower side, the magnetic pole originally located below rotates to the upper side, and because the first magnet and the second magnet are far away from the attracting magnet, the attraction between the first magnet and the attracting magnet and the attraction magnet disappears, and under the gravity action of the connecting seat, the connecting seat is automatically separated from the base.
In the scheme, the installation and the disassembly of the base and the connecting seat can be realized rapidly by rotating the rotating block, and the operation is simple and convenient; moreover, when the base and the connecting seat realize the magnetic attraction connection, the lower end of the first rack on the base automatically stretches into the second slideway of the connecting seat, the connecting seat is limited, the connecting seat can be effectively prevented from shaking at will, and the stability and the reliability of connection are ensured. When the base is required to be separated from the connecting seat, the rotating block is screwed, and meanwhile, the first magnet and the second magnet are gradually far away from the attracting magnet, so that attractive force between the first magnet and the attracting magnet and attractive force between the second magnet and the attracting magnet can be weakened, and the rotating block is prevented from being difficult to rotate due to overlarge attractive force.
Optionally, the elastic member is a compression spring. The compression spring has wide sources and low price, meets the use requirement of the scheme, and is reasonable to be used as an elastic piece.
Optionally, the connecting seat is provided with a limiting groove communicated with the second slideway, and the second magnet is provided with a protrusion which is in sliding connection with the limiting groove. The setting of spacing groove has controlled the motion range of second magnet, can effectively avoid the second magnet to break away from the connecting seat.
Optionally, a sliding groove is formed in the base, and a second rack meshed with the driven gear and the lower end of which extends out of the base is connected to the sliding groove in a sliding manner; the connecting seat is provided with a strip-shaped groove, and the second rack can extend into the strip-shaped groove. The second rack is arranged, the second rack and the first rack are matched to rapidly and accurately position the connecting seat, when the connecting seat is required to be connected with the base, the first rack stretches into the second slideway, the second rack stretches into the strip-shaped groove, and matching of the connecting seat and the connecting position of the base can be guaranteed. After the connecting seat is connected with the base, the first rack and the second rack are equivalent to two positioning rods of the connecting seat, so that the connecting seat can be effectively prevented from shaking at will, and the stability and the reliability of connection are ensured.
Drawings
FIG. 1 is a right-side view of a mechanical magnetic quick release structure of a material friction abnormal sound test bed in accordance with an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along the direction A-A in FIG. 1;
FIG. 3 is a front view of a mechanical magnetic quick release structure of a material friction abnormal sound test stand in a second embodiment of the invention;
FIG. 4 is a cross-sectional view taken along the direction B-B in FIG. 3;
fig. 5 is a sectional view in the direction C-C of fig. 3.
Detailed Description
The following is a further detailed description of the embodiments:
reference numerals in the drawings of the specification include: base 10, first magnet 11, draw-in groove 12, first slide 13, first piston 14, connecting seat 20, second magnet 21, second slide 22, spacing groove 221, elastic member 23, second piston 24, magnetic attraction block 30, attraction magnet 31, connecting shaft 32, driven gear 40, connecting rod 41, rotating block 50, positioning member 51, driving gear 60, chute 70, second rack 71, first rack 80.
Example 1
This embodiment is basically as shown in fig. 1 and 2: the mechanical magnetic type quick-release structure of the material friction abnormal sound test bed comprises a base 10, a connecting seat 20 and a pressing rod (the pressing rod is not shown in the figure) welded below the connecting seat 20. The base 10 is rotationally connected with a magnetic attraction block 30 and is provided with a driving mechanism for driving the magnetic attraction block 30 to rotate, the magnetic attraction block 30 is a cylinder, a concave cavity which can be communicated with the outside is formed in the lower portion of the base 10, the magnetic attraction block 30 is rotationally connected in the concave cavity, the lower portion of the magnetic attraction block 30 extends out of the concave cavity, the length of the magnetic attraction block 30 extending out of the concave cavity is 1/3-1/5 of the overall height of the magnetic attraction block 30, and in the embodiment, the length of the magnetic attraction block 30 extending out of the concave cavity is 1/5 of the overall height of the magnetic attraction block 30. The connecting seat 20 is provided with a groove which can be matched with the lower part of the magnetic attraction block 30.
An attracting magnet 31 is fixed in the magnet 30, and two magnetic poles of the attracting magnet 31 are distributed on the upper side and the lower side of the magnet 30. The base 10 is internally fixed with a first magnet 11, the connecting seat 20 is internally fixed with a second magnet 21, the first magnet 11 can attract one magnetic pole of the attracting magnet 31, and the second magnet 21 can attract the other magnetic pole of the attracting magnet 31.
The driving mechanism comprises a driving gear 60 and a driven gear 40 which are all rotatably connected to the base 10, wherein the driving gear 60 is meshed with the driven gear 40, and the transmission ratio of the driving gear 60 to the driven gear 40 is 1:1. A connecting shaft 32 is connected between the driven gear 40 and the magnetic attraction block 30, and two ends of the connecting shaft 32 are welded on the rotation center of the driven gear 40 and the rotation center of the magnetic attraction block 30 respectively. The driving gear 60 is fixed with a rotating block 50 extending out of the base 10, the rotating block 50 is connected with the driving gear 60 through a connecting rod 41, and the rotating block 50 is provided with a positioning part for fixing the rotating block 50. The positioning part comprises a positioning piece 51 and a through hole formed in the rotating block 50, 2 clamping grooves 12 capable of being opposite to the through hole are formed in the base 10, and a third magnet is fixed in the clamping grooves 12; each 180 degrees of rotation of the rotating block 50, the through hole can be opposite to one of the clamping grooves 12, and when the through hole is opposite to one of the clamping grooves 12, the first magnet 11 and the second magnet 21 are opposite to the attracting magnet 31. The positioning piece 51 is connected to the through hole in a sliding way and can extend into the clamping groove 12, a fourth magnet which can attract the third magnet is fixed on one side of the positioning piece 51 close to the clamping groove 12, and a protruding block with the length larger than the diameter of the through hole is fixed on one side of the positioning piece 51 far away from the clamping groove 12.
When the connecting seat 20 and the compression bar on the connecting seat 20 are required to be connected with the base 10, the rotating block 50 is screwed, the driving gear 60 is driven to rotate by the rotating block 50, and the magnetic attraction block 30 is driven to rotate together by the driven gear 40 when the driving gear 60 rotates. When the magnet 30 rotates to a desired position (that is, when the first magnet 11 is opposite to one of the magnetic poles of the attracting magnet 31 and attracts the same), the rotating block 50 stops being screwed, and at this time, the positioning piece 51 is opposite to the clamping groove 12, and under the attraction of the third magnet, the positioning piece 51 on the fourth magnet and the fourth magnet stretches into the clamping groove 12, and the rotating block 50, the driving gear 60 and the magnet 30 are fixed and cannot rotate at will. The grooves of the connection base 20 are engaged with the lower portions of the magnet blocks 30, and at this time, the magnetic poles below the attracting magnet 31 and the second magnet 21 attract each other, and the connection base 20 and the pressing rod are connected to the base 10 by the attraction force. When the connection base 20 and the pressing rod need to be detached to replace new materials, a force is applied to the protrusion to disengage the positioning member 51 from the clamping groove 12, then the rotating block 50 is rotated 180 degrees, the magnetic pole originally located above is rotated to the lower side, and the magnetic pole originally located below is rotated to the upper side, at this time, the connection base 20 is automatically disengaged from the base 10 under the repulsive force of the attracting magnet 31 and the second magnet 21 and under the gravity of the connection base 20 itself.
Example two
This embodiment is basically as shown in fig. 3 and 4: the mechanical magnetic type quick-release structure of the material friction abnormal sound test bed comprises a base 10, a connecting seat 20 and a compression bar welded below the connecting seat 20. The base 10 is rotationally connected with a magnetic attraction block 30 and is provided with a driving mechanism for driving the magnetic attraction block 30 to rotate, the magnetic attraction block 30 is a cylinder, a concave cavity which can be communicated with the outside is formed in the lower portion of the base 10, the magnetic attraction block 30 is rotationally connected in the concave cavity, the lower portion of the magnetic attraction block 30 extends out of the concave cavity, the length of the magnetic attraction block 30 extending out of the concave cavity is 1/3-1/5 of the overall height of the magnetic attraction block 30, and in the embodiment, the length of the magnetic attraction block 30 extending out of the concave cavity is 1/5 of the overall height of the magnetic attraction block 30. The connecting seat 20 is provided with a groove which can be matched with the lower part of the magnetic attraction block 30.
An attracting magnet 31 is fixed in the magnet 30, and two magnetic poles of the attracting magnet 31 are distributed on the upper side and the lower side of the magnet 30. The base 10 is provided with a first magnet 11, the connecting seat 20 is provided with a second magnet 21, the first magnet 11 can attract one magnetic pole of the attracting magnet 31, and the second magnet 21 can attract the other magnetic pole of the attracting magnet 31.
The driving mechanism comprises a driving gear 60 and a driven gear 40 meshed with the driving gear 60, a containing cavity is formed in the base 10, the driving gear 60 and the driven gear 40 are both rotationally connected in the containing cavity, and the transmission ratio of the driving gear 60 to the driven gear 40 is 1:1. A connecting shaft 32 is connected between the driven gear 40 and the magnetic attraction block 30, and two ends of the connecting shaft 32 are welded on the rotation center of the driven gear 40 and the rotation center of the magnetic attraction block 30 respectively. The driving gear 60 is fixed with a rotating block 50 extending out of the base 10, and the rotating block 50 is provided with a positioning portion for fixing the rotating block 50. Referring to fig. 5, the positioning part includes a positioning member 51 and a through hole formed in the rotating block 50, 2 slots 12 are formed in the base 10, which can be opposite to the through hole, and a third magnet is fixed in the slots 12. When the through hole is opposite to one of the clamping grooves 12, the rotating block 50 rotates 180 degrees, the through hole can be opposite to the other clamping groove 12, and when the through hole is opposite to the clamping groove 12, the first magnet 11 and the second magnet 21 can be opposite to the attraction magnet 31, the first magnet 11 attracts the magnetic pole above the attraction magnet 31, and the second magnet 21 attracts the magnetic pole below the attraction magnet 31. The positioning piece 51 is connected to the through hole in a sliding way and can extend into the clamping groove 12, a fourth magnet which can attract the third magnet is fixed on one side of the positioning piece 51 close to the clamping groove 12, and a protruding block with the length larger than the diameter of the through hole is fixed on one side of the positioning piece 51 far away from the clamping groove 12.
The base 10 is provided with a first slideway 13, the connecting seat 20 is provided with a U-shaped second slideway 22, the first magnet 11 is slidably and hermetically connected in the first slideway 13, and the second magnet 21 is slidably and hermetically connected in the right side of the second slideway 22. The connecting seat 20 is provided with a limiting groove 221 communicated with the second slideway 22, and the second magnet 21 is welded with a protrusion which is connected in the limiting groove 221 in a sliding way. The second slide 22 slides in the left side and is connected with a second piston 24 in a sealing manner, and an elastic member 23 for resetting the second piston 24 is further arranged in the second slide 22, and in this embodiment, the elastic member 23 is a compression spring, one end of which is connected to the second piston 24, and the other end of which is connected to the second slide 22. The second slide 22 is filled with hydraulic oil between the second piston 24 and the second magnet 21, and when no other external force acts, the second piston 24 is located in the upper portion of the connecting seat 20, and the second magnet 21 is located in the lower portion of the connecting seat 20 away from the upper surface of the connecting seat 20 under the action of the compression spring.
The first slide way 13 is internally and slidably connected with a first piston 14 in a sealing way, and the first slide way 13 is filled with hydraulic oil between the first piston 14 and the first magnet 11. The first slideway 13 is also connected with a first rack 80 meshed with the driving gear 60 in a sliding way (the inner diameter of the first rack 80 is slightly smaller than that of the first slideway 13), and the lower part of the first rack 80 extends out of the first slideway 13 and can extend into the second slideway 22 and be contacted with the second piston 24; the first piston 14 is welded to the upper portion of the first rack 80, and the first rack 80 can slide along the first slide 13 under the action of the first piston 14. When the positioning piece 51 extends into one of the clamping grooves 12 and the first magnet 11 and the second magnet 21 are opposite to the attracting magnet 31, the rotating block 50 is rotated clockwise to rotate 180 degrees, the positioning piece 51 extends into the other clamping groove 12, at this time, the first magnet 11 is located on the right side of the magnetic attraction block 30, and the second magnet 21 is located below the magnetic attraction block 30.
The base 10 is provided with a chute 70, the chute 70 is slidably connected with a second rack 71 meshed with the driven gear 40, the connecting seat 20 is provided with a bar-shaped groove opposite to the chute 70, and the second rack 71 can extend into the bar-shaped groove. When the positioning member 51 is engaged with any of the engaging grooves 12, the lower portions of the first rack 80 and the second rack 71 can both extend out of the base 10.
When the connection base 20 and the compression bar on the connection base 20 need to be connected with the base 10, the positioning piece 51 stretches into the corresponding side clamping groove 12, so that the first magnet 11 is located on the right side of the magnetic block 30, and the second magnet 21 is located below the magnetic block 30. The connecting seat 20 is correspondingly matched with the connecting seat 20, so that the lower end of the first rack 80 extends into the second slideway 22, the lower end of the second rack 71 extends into the slot,
the rotating block 50 is screwed anticlockwise, the driving gear 60 is driven to rotate by the rotating block 50, and the magnetic attraction block 30 is driven to rotate together by the driven gear 40 when the driving gear 60 rotates. After the rotating block 50 rotates 180 degrees, the magnetic pole below the attracting magnet 31 can attract the second magnet 21, and the magnetic pole above and below the attracting magnet can attract the first magnet 11; at the same time, the positioning piece 51 is opposite to the other clamping groove 12, under the attraction of the third magnet, the fourth magnet and the positioning piece 51 on the fourth magnet extend into the clamping groove 12, and the rotating block 50, the driving gear 60 and the magnetic attraction block 30 are fixed and cannot rotate at will. During the counterclockwise rotation of the rotating block 50, the first rack 80 and the second rack 71 gradually move downwards and extend deeper into the second slideway 22 and the bar-shaped groove. The first rack 80 moves downwards and drives the first piston 14 to move downwards, and under the transmission effect of the hydraulic oil of the first slideway 13, the first magnet 11 gradually moves leftwards and is finally positioned right above the attraction magnet 31 and is attracted with the upper magnetic pole of the attraction magnet 31; simultaneously, the first rack 80 applies downward acting force to the second piston 24 to enable the second piston 24 to descend, the spring is compressed, the second magnet 21 gradually ascends and gets closer to the attraction magnet 31 under the transmission action of hydraulic oil of the second slideway 22, and attracts the lower magnetic pole of the attraction magnet 31 mutually, and under the attraction force, the connecting seat 20 can be well connected to the base 10.
When the connecting seat 20 and the compression bar are required to be detached to replace new materials, acting force is applied to the bulge, the positioning piece 51 is separated from the clamping groove 12, then the rotating block 50 is rotated clockwise by 180 degrees, in the process of rotating the rotating block 50 clockwise, the first magnet 11 and the second magnet 21 are gradually far away from the attracting magnet 31, the situation that the rotating block 50 is difficult to rotate due to overlarge mutual attractive force between the first magnet 11 and the attracting magnet 31 and between the second magnet 21 and the attracting magnet 31 is avoided, after the rotating is completed, the attracting magnet 31 is far away from an originally upper magnetic pole to be rotated to the lower magnetic pole to be rotated to the upper side, and because the first magnet 11 and the second magnet 21 are far away from the attracting magnet 31, and attractive force between the first magnet 11 and the attracting magnet 31 and attractive force between the second magnet 21 and the attracting magnet 31 are disappeared, the connecting seat 20 is automatically separated from the base 10 under the gravity action of the connecting seat 20.
The foregoing is merely exemplary embodiments of the present invention, and specific structures and features that are well known in the art are not described in detail herein. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the present invention.
Claims (6)
1. Mechanical magnetic type quick-release structure of material friction abnormal sound test bed, its characterized in that: the device comprises a base and a compression bar, wherein a magnetic attraction block is rotationally connected to the lower part of the base, a driving mechanism for driving the magnetic attraction block to rotate is arranged on the magnetic attraction block, and two magnetic poles of the attraction magnet are distributed on the upper side and the lower side of the magnetic attraction block; the base is provided with a first magnet which can attract one magnetic pole of the attracting magnet, and the pressing rod is provided with a second magnet which can attract the other magnetic pole of the attracting magnet; the pressure lever is provided with a connecting seat, a groove which can be matched with the lower part of the magnetic suction block is formed in the connecting seat, and the second magnet is arranged on the connecting seat and is positioned below the groove; the positioning part comprises a positioning piece and a through hole formed in the rotating block, a clamping groove capable of being opposite to the through hole is formed in the base, and a third magnet is fixed in the clamping groove; the positioning piece is connected to the through hole in a sliding way and can extend into the clamping groove, a fourth magnet which can attract the third magnet is fixed on one side of the positioning piece, which is close to the clamping groove, and a protruding block with the length larger than the diameter of the through hole is fixed on one side of the positioning piece, which is far away from the clamping groove; the base is provided with a first slideway, the connecting seat is provided with a second slideway, the first magnet is slidably and hermetically connected in the first slideway, and the second magnet is slidably and hermetically connected in the second slideway; the second slide way is internally and slidably connected with a second piston in a sealing way and is provided with an elastic piece for resetting the second piston; the first slide way is internally and slidably connected with a first piston and a first rack meshed with the driving gear in a sealing manner, the first piston is fixed on the upper part of the first rack, and the lower part of the first rack can extend into the second slide way and be in contact with the second piston; when the positioning piece stretches into one of the clamping grooves, the first magnet and the second magnet are opposite to the attracting magnet and attract each other; the driving mechanism comprises a driving gear and a driven gear which are all rotationally connected to the base, and the driving gear is meshed with the driven gear; a connecting shaft is connected between the driven gear and the magnetic attraction block; the driving gear is fixed with a rotating block extending out of the base, and the rotating block is provided with a positioning part.
2. The mechanical magnetic quick-release structure of the material friction abnormal sound test stand according to claim 1, wherein the mechanical magnetic quick-release structure is characterized in that: the magnetic block is cylindrical, a concave cavity communicated with the outside is formed in the base, the magnetic block is rotationally connected in the concave cavity, and the lower part of the magnetic block extends out of the concave cavity; the length of the magnetic attraction block extending out of the concave cavity is 1/3-1/5 of the whole height of the magnetic attraction block.
3. The mechanical magnetic quick-release structure of the material friction abnormal sound test stand according to claim 1, wherein the mechanical magnetic quick-release structure is characterized in that: the transmission ratio of the driving gear to the driven gear is 1:1, 2 clamping grooves are formed in the base, and each time the rotating block rotates 180 degrees, the through hole can be opposite to one of the clamping grooves.
4. The mechanical magnetic quick-release structure of the material friction abnormal sound test stand according to claim 1, wherein the mechanical magnetic quick-release structure is characterized in that: the elastic piece is a compression spring.
5. The mechanical magnetic quick-release structure of the material friction abnormal sound test stand according to claim 1, wherein the mechanical magnetic quick-release structure is characterized in that: the connecting seat is provided with a limiting groove communicated with the second slideway, and the second magnet is provided with a protrusion which is in sliding connection with the limiting groove.
6. The mechanical magnetic quick-release structure of the material friction abnormal sound test stand according to claim 1, wherein the mechanical magnetic quick-release structure is characterized in that: a sliding groove is formed in the base, and a second rack meshed with the driven gear and the lower end of which extends out of the base is connected to the sliding groove in a sliding manner; the connecting seat is provided with a strip-shaped groove, and the second rack can extend into the strip-shaped groove.
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