CN112697695A

CN112697695A - Electromagnetic quick-release structure of vibration exciter of material friction abnormal sound test bed

Info

Publication number: CN112697695A
Application number: CN202011375049.7A
Authority: CN
Inventors: 谭成友; 李沛然; 佘扬佳; 饶刚
Original assignee: China Automotive Engineering Research Institute Co Ltd
Current assignee: China Automotive Engineering Research Institute Co Ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-04-23
Anticipated expiration: 2040-11-30
Also published as: CN112697695B

Abstract

The invention relates to the technical field of friction abnormal sound test equipment, in particular to an electromagnetic quick-release structure of a vibration exciter of a material friction abnormal sound test bench, which comprises a connecting seat and a butt joint seat, wherein a round hole is formed in the middle of the connecting seat, the diameter of the round hole is smaller than that of the butt joint seat, a stand column is installed in the center of the top surface of the butt joint seat, a plurality of electromagnets are fixed on the stand column, magnetic poles of the electromagnets are positioned on the side surface of the stand column after the electromagnets are electrified, at least two spring pieces are uniformly distributed on the periphery of the stand column, the spring pieces are parallel to the stand column and are statically connected to the butt joint seat, magnetic suction blocks corresponding to the electromagnets are fixedly connected to the spring pieces, the diameter of the excircle of the outer. When a material friction abnormal sound test is carried out, the connecting seat and the pressure rod of the abnormal sound friction test table are connected quickly and conveniently.

Description

Electromagnetic quick-release structure of vibration exciter of material friction abnormal sound test bed

Technical Field

The invention relates to the technical field of friction abnormal sound test equipment, in particular to an electromagnetic quick-release structure of a vibration exciter of a material friction abnormal sound test bed.

Background

Automobile abnormal sound is the sound produced by two materials colliding or rubbing against each other, which is almost the most annoying and intolerable problem for all consumers. Abnormal sound can hardly be avoided completely, wherein the abnormal sound of friction is the common abnormal sound problem that just is difficult to solve of car, can test the coefficient of friction between the sample piece through abnormal sound friction test bench to the abnormal sound of car produces the position and carries out prophase prediction, eliminates or reduces this kind of sound from the root. During testing, a certain pressure is applied to the two materials in the vertical direction through the vertical loading mechanism, and the two test samples perform reciprocating friction motion according to a set rule in the horizontal direction through the actuating device, so that the friction coefficient is measured.

When the material friction abnormal sound test is done, perpendicular loading mechanism includes the motor of taking the lead screw, installs the connecting seat on the lead screw, be used for the depression bar of transmission pressure and set up the pressure head in the depression bar bottom, and the test sample spare is fixed usually on the pressure head, and for the convenience of fixed test sample spare, generally need take off the depression bar with the pressure head, adorn again the depression bar top after the test sample spare on the connecting seat of packing back. At present, the connecting mode between the connecting seat and the pressure rod adopts bolt connection or flange connection, but the time consumption is long when the connecting is carried out, the space of the connecting part is narrow, and the operation is not convenient during the bolt fastening.

Disclosure of Invention

The invention aims to provide an electromagnetic quick-release structure of a vibration exciter of a material friction abnormal sound test bed, so that connection between a connecting seat and a pressure rod can be realized quickly and conveniently.

In order to achieve the purpose, the scheme of the invention is as follows: the electromagnetic quick-release structure of the vibration exciter of the material friction abnormal sound test bed comprises a connecting seat and a butt-joint seat, a round hole is formed in the middle of the connecting seat, the diameter of the round hole is smaller than that of the butt-joint seat, a stand column is installed in the center of the top surface of the butt-joint seat, a plurality of electromagnets are fixed on the stand column, magnetic poles of the electromagnets are located on the side faces of the stand column after the electromagnets are electrified, at least two spring pieces are uniformly distributed on the periphery of the stand column and are parallel to the stand column, the spring pieces are statically connected to the butt-joint seat, magnetic suction blocks corresponding to the electromagnets are fixedly connected to the spring pieces, the diameter of the excircle of the outer edge.

The working principle and the beneficial effects of the scheme are as follows: when a material friction abnormal sound test is carried out, the connecting seat is used for being connected with a screw nut on the screw rod, and the pressing rod can be fixed on the bottom surface of the butt joint seat through welding, bonding and the like. After the electro-magnet circular telegram, the electro-magnet produces the appeal to magnetism piece, inhale the piece to the inboard with magnetism, even make the diameter of the circumscribed circle of two piece outside edges of magnetism piece far away all be less than the diameter of round hole apart from, then aim at the axis position of round hole with the stand, can insert the round hole with spring leaf and magnetism piece together, until butt joint seat and connecting seat offset, then the electro-magnet outage, magnetism piece offsets or the overhead kick is kept away from on the terminal surface of butt joint seat with the inside wall of round hole under the effect of spring leaf elasticity, utilize the frictional force of magnetism piece or the removal of overhead kick restriction butt joint seat, thereby realize connecting seat and the being connected of butt joint seat. When the butt joint seat needs to be taken down, the electromagnet only needs to be electrified, and then the butt joint seat is pulled out downwards. The installation and the dismantlement are very convenient, do not need other instrument cooperations moreover, also do not need more operating space, not only quick but also convenient operation.

Optionally, a sink groove matched with the magnetic suction block is further formed in the circular hole. So that the magnetic block can be hooked on the side wall of the sinking groove after being inserted into the round hole.

Optionally, the cross-section of the post is rectangular. The butt joint seat can be prevented from rotating relative to the connecting seat.

Optionally, the circular hole is a counter bore, a shoulder hole with a diameter larger than that of the circular hole is formed in one side, away from the docking seat, of the circular hole, and the shoulder hole is coaxial with the circular hole. So that the upright post, the spring piece and the magnetic suction block can be hidden in the connecting seat and the reliable connection can still be ensured.

Optionally, the length of the upright post is greater than that of the spring plate, and an upright post hole in transition fit with the upright post is further formed in the axis of the counter bore. In some experiments, the pressure head of depression bar bottom probably has deflection torque, causes probably to take place radial offset between connecting seat and the butt joint seat, utilizes the setting in the stand inserts the stand hole, will keep relatively fixed between butt joint seat and the connecting seat, avoids taking place the condition emergence of radial offset to guarantee real experimental precision.

Optionally, the connecting seat is fixedly connected with a connecting lug on the side surface, and a through hole is formed in the connecting lug. The lead screw nut is usually provided with a flange plate, so that the lead screw nut is conveniently connected with the lead screw nut through the connecting lug by adopting a screw rod.

Optionally, the magnetic attraction piece is a permanent magnet and comprises a hoop, the hoop is a circular ring, the stand is a cylinder, an external thread is arranged at one end, close to the butt joint seat, of the cylinder, a threaded hole matched with the stand is formed in the butt joint seat, and the magnetic attraction piece is a permanent magnet. Hoop is in the outside of all spring pieces, changes the polarity of electro-magnet periodically, and magnetism piece and stand just constitute the rotor structure of motor, and when the rotor was rotatory, the stand can go up and down in the threaded hole under the effect of external screw thread, and whether the control stand need be higher than the spring piece top.

Optionally, the number of the spring pieces is four, and the spring pieces are circularly arrayed around the upright post by taking the axle center of the upright post as the circle center. The reliability of the connection between the spring piece and the connecting seat is ensured.

Optionally, a flange is arranged at the bottom of the docking seat. The butt joint seat and the pressure rod are convenient to be connected through flanges.

Optionally, the two sides of the round hole of the connecting seat are further in threaded connection with bolts, the bolts are parallel to the round hole, and the length of each bolt is larger than the thickness of the connecting seat. The end of the bolt can be abutted against the top surface of the butt joint seat, the distance between the connecting seat and the butt joint seat is adjusted, and the bolt is abutted against the butt joint seat when the longitudinal connection between the connecting seat and the butt joint seat is loosened.

Drawings

Fig. 1 is a schematic structural diagram of an electromagnetic quick release structure of a vibration exciter of a material friction abnormal sound test bed according to an embodiment of the invention;

fig. 2 is a schematic structural diagram of an electromagnetic quick release structure of a vibration exciter of a material friction abnormal sound test bed in the second embodiment of the invention.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the connecting seat comprises a connecting seat 1, a connecting lug 101, a bolt 102, a round hole 2, a shoulder hole 3, a stand column hole 4, a stand column 5, a spring piece 6, a magnetic suction block 7, an electromagnet 8, a threaded hole 9 and a hoop 10.

Example one

This embodiment is substantially as shown in fig. 1: an electromagnetic quick-release structure of a vibration exciter of a material friction abnormal sound test bed comprises a connecting seat 1 and a butt-joint seat, wherein a connecting lug 101 is fixedly connected on the side surface of the connecting seat 1, a through hole is formed in the connecting lug 101, a round hole 2 with the diameter of 25mm and the depth of 30mm is formed in the middle of the connecting seat 1, the diameter of the round hole 2 is smaller than that of the butt-joint seat, an upright post 5 with the rectangular cross section and the height of 50mm is installed at the center of the top surface of the butt-joint seat, four electromagnets 8 are fixed on the upright post 5, the four electromagnets 8 are respectively fixed on four side surfaces of the upright post 5, four spring pieces 6 with the thickness of 2mm are evenly distributed around the upright post 5, the spring pieces 6 are parallel to the upright post 5, the electromagnets 8 face towards the spring pieces 6, the spring pieces 6 are welded on the butt-joint seat, a magnetic attraction piece 7 corresponding to the electromagnets 8, the diameter of the circumcircle of the outer edge of the magnetic block 7 which is arranged oppositely is 30 mm.

The round hole 2 is a counter bore, a shoulder hole 3 with the diameter of 32mm is formed in one side, away from the butt joint seat, of the round hole 2, and the shoulder hole 3 is coaxial with the round hole 2. The axial line of the counter bore is also provided with a column hole 4 which is 35mm deep and is in transition fit with the column 5.

The bottom of the butt joint seat is provided with a flange. The bolt 102 is connected to two sides of the round hole 2 of the connecting seat 1 through threads, the bolt 102 is parallel to the round hole 2, the length of the bolt 102 is larger than the thickness of the connecting seat 1 by 20mm, and a gasket for preventing the bolt 102 from damaging the butt joint seat is arranged at the bottom of the bolt 102.

When a material friction abnormal sound test is carried out, the connecting seat 1 is connected with a screw nut on the screw rod through the connecting lug 101, and the pressing rod is fixed on the bottom surface of the butt joint seat through flange connection. After the electromagnet 8 is electrified, the electromagnet 8 attracts the magnetic attraction block 7 to the inner side, then the upright post 5 is aligned to the axis position of the round hole 2, the spring piece 6 and the magnetic attraction block 7 can be inserted into the round hole 2 together until the butt joint seat is abutted against the connecting seat 1, then the electromagnet 8 is powered off, and the magnetic attraction block 7 is hooked on the side wall of the shoulder hole 3 under the elastic force of the spring piece 6. The upright post 5 is inserted into the upright post hole 4, so that the radial deviation between the connecting seat 1 and the butt joint seat is avoided. If it is not desired to loosen the connection socket 1 from the docking socket, the bolt 102 is screwed to abut the lower end of the bolt 102 against the top surface of the docking socket. When the butt joint seat needs to be taken down, the electromagnet 8 is electrified, and then the butt joint seat is pulled out downwards.

Example two

The present embodiment is different from the first embodiment in that: as shown in the attached drawing 2, the magnetic attraction type vertical column comprises a hoop 10, wherein the hoop 10 is a circular ring, the inner diameter of the hoop 10 is 22mm, the thickness of the hoop 10 is 1mm, a vertical column 5 is a cylinder, an external thread is arranged at one end, close to a butt joint seat, of the cylinder, a threaded hole 9 which is matched with the vertical column 5 and has the depth of 30mm is arranged on the butt joint seat, the vertical column 5 is in threaded connection with the threaded hole 9, and a magnetic attraction block 7 is a permanent magnet.

The hoops 10 are hooped on the outer sides of all the spring pieces 6, the polarity of the electromagnets 8 is periodically changed, the magnetic attraction blocks 7 and the upright posts 5 form a rotor structure of the motor, when the rotor rotates, the upright posts 5 can ascend and descend in the threaded holes 9 under the action of external threads, and whether the upright posts 5 need to be higher than the top ends of the spring pieces 6 or not is controlled.

The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the present invention.

Claims

1. Electromagnetic quick-release structure of vibration exciter of material friction abnormal sound test bed, which is characterized in that: including connecting seat and butt joint seat, open at the connecting seat middle part has the round hole, the diameter of round hole is less than the diameter of butt joint seat, butt joint seat top surface center department installs a stand, be fixed with a plurality of electro-magnets on the stand, the electro-magnet circular telegram back magnetic pole is located the stand side, stand equipartition all around has two piece at least spring leafs, the spring leaf is parallel with the stand, the spring leaf static coupling is on butt joint seat, fixedly connected with and the magnetism piece that corresponds of electro-magnet on the spring leaf, the diameter of the relative spring leaf outside edge circumscribed circle that sets up is less than the diameter of round hole, the diameter of the relative magnetism piece outside.

2. The electromagnetic quick-release structure of the exciter of the material friction abnormal sound test bed according to claim 1, is characterized in that: the round hole is also provided with a sinking groove matched with the magnetic block.

3. The electromagnetic quick-release structure of the exciter of the material friction abnormal sound test bed according to claim 2, is characterized in that: the cross section of the upright post is rectangular.

4. The electromagnetic quick-release structure of the exciter of the material friction abnormal sound test bed according to claim 1, is characterized in that: the round hole is a counter bore, a shoulder hole with the diameter larger than that of the round hole is arranged in one side of the round hole, which is far away from the butt joint seat, and the shoulder hole is coaxial with the round hole.

5. The electromagnetic quick-release structure of the exciter of the material friction abnormal sound test bed according to claim 1, is characterized in that: the length of the upright post is greater than that of the spring piece, and an upright post hole in transition fit with the upright post is further formed in the axis of the counter bore.

6. The electromagnetic quick-release structure of the exciter of the material friction abnormal sound test bed according to claim 1, is characterized in that: the side surface of the connecting seat is fixedly connected with a connecting lug, and the connecting lug is provided with a through hole.

7. The electromagnetic quick-release structure of the exciter of the material friction abnormal sound test bed according to claim 1, is characterized in that: the magnetic attraction piece is a permanent magnet.

8. The electromagnetic quick-release structure of the exciter of the material friction abnormal sound test bed according to claim 7, is characterized in that: the number of the spring pieces is four, and the spring pieces are circularly arrayed around the upright post by taking the axle center of the upright post as the circle center.

9. The electromagnetic quick-release structure of the exciter of the material friction abnormal sound test bed according to claim 1, is characterized in that: the bottom of the butt joint seat is provided with a flange.

10. The electromagnetic quick-release structure of the exciter of the material friction abnormal sound test bed according to claim 1, is characterized in that: the bolt is connected with the round hole of the connecting seat through threads, the bolt is parallel to the round hole, and the length of the bolt is larger than the thickness of the connecting seat.