CN217586230U - Moving coil lower part guiding device of electric vibration table and electric vibration table - Google Patents
Moving coil lower part guiding device of electric vibration table and electric vibration table Download PDFInfo
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- CN217586230U CN217586230U CN202221651757.3U CN202221651757U CN217586230U CN 217586230 U CN217586230 U CN 217586230U CN 202221651757 U CN202221651757 U CN 202221651757U CN 217586230 U CN217586230 U CN 217586230U
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Abstract
The utility model discloses an electric vibration table's movable coil lower part guider and electric vibration table. The moving coil lower guide device includes: the guide shaft is fixedly connected with the moving coil, the guide bearing comprises a bearing seat, a bushing and a plurality of balls, the bushing is sleeved in the bearing seat, the guide shaft is sleeved in the bushing, the balls are arranged between the bushing and the bearing seat and distributed around the bushing along a selected arc track, each ball can rotate freely, and the bushing can move linearly along the axial direction of the bushing and rotate along the circumferential direction of the bushing relative to the bearing seat. The embodiment of the utility model provides a pair of moving coil lower part guider of electric vibration table can 360 free rotations, and the atress on the circumferencial direction is even, can effectively solve the wearing and tearing problem of the fixed direction of guiding axle.
Description
Technical Field
The utility model particularly relates to a moving coil lower part guider and electric vibration platform of electric vibration platform belongs to vibration test technical field.
Background
An electric vibration test stand (hereinafter referred to as an electric vibration stand) is a device for carrying out vibration simulation test on products or parts, and the test can evaluate the anti-seismic performance of a product and provide reasonable basis for checking the quality of the product, so that the electric vibration test stand is widely applied to the industries of aerospace, aviation, ships, automobiles, electronics, communication, household appliances, instruments and the like.
The electric vibration table mainly comprises a table body, an upper excitation coil, a lower excitation coil, a moving coil, an upper guide device, a lower guide device and the like, wherein the table body comprises a magnetic cylinder ring, a central magnetic pole, an upper polar plate, a lower polar plate, an upper cover and a bottom cover; the working principle is as follows: the exciting coil is energized with a direct current to generate a fixed magnetic field, an exciting force is generated to the moving coil which is arranged in the fixed magnetic field and is energized with a current, and when the moving coil is energized with an alternating current, the moving coil generates a corresponding alternating motion.
The moving coil plays an important role in the electric vibration table, and is arranged on a table body through a guide device and a support device. The guide device is a motion restraint mechanism and is used for positioning the moving coil and limiting unnecessary transverse motion, so that the moving coil is ensured to vibrate back and forth in the vibration direction. Generally, in the vibration table, the guide means is divided into two types, an upper guide means located at an upper portion of the moving coil and a lower guide means located at a lower portion of the moving coil.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a moving coil lower guide device and an electric vibration table for an electric vibration table, which overcome the disadvantages of the prior art.
For realizing the purpose of the utility model, the utility model discloses a technical scheme include:
the embodiment of the utility model provides an electrodynamic vibration platform's movable coil lower part guider, including guiding axle and direction bearing, guiding axle and movable coil fixed connection, the direction bearing includes bearing frame, bush and a plurality of ball, the bush cover is established in the bearing frame, the guiding axle sleeve is established in the bush, and a plurality of balls set up between bush and the bearing frame and encircle along selected pitch arc orbit the bush distributes, each the equal free rotation of ball, the bush can take place for bearing frame, guiding axle along the ascending linear motion of self axial direction and along the ascending rotary motion of self circumference direction.
The embodiment of the utility model provides an electric vibration table is still provided, including shaking table stage body, movable coil and electric vibration table's movable coil lower part guider, the movable coil passes through on the movable coil lower part guider installation shaking table stage body.
Compared with the prior art, the utility model has the advantages that:
1) In the lower guide device for the moving coil of the electric vibration table provided by the embodiment of the utility model, the bush can freely slide up and down in the bearing seat under the action of the balls, and can also freely rotate and slide in the circumferential direction;
2) The embodiment of the utility model provides a 360 degrees of circumference equipartitions of ball in the movable coil lower part guider of electronic shaking table, can rotate freely to can reduce the friction loss between ball and bearing frame, guide shaft;
3) The embodiment of the utility model provides a pair of moving coil lower part guider of electric vibration table can 360 free rotations, and the atress on the circumferencial direction is even, can effectively solve the wearing and tearing problem of the fixed direction of guiding axle.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of an electric vibration table provided in an exemplary embodiment of the present invention;
fig. 2 is a schematic structural view of an electric vibration table and a lower guide of a moving coil provided in an exemplary embodiment of the present invention;
fig. 3 is a schematic cross-sectional view of a lower guide of a moving coil according to an exemplary embodiment of the present invention;
fig. 4 is a schematic cross-sectional view of a lower guide of a moving coil according to an exemplary embodiment of the present invention;
fig. 5 is a schematic structural view of a lower guide device for a moving coil according to an exemplary embodiment of the present invention.
Detailed Description
In view of the deficiencies in the prior art, the inventor of the present invention has made extensive studies and practices to provide the technical solution of the present invention. The technical solution, its implementation and principles, etc. will be further explained as follows.
The embodiment of the utility model provides an electrodynamic vibration platform's movable coil lower part guider, including guiding axle and direction bearing, guiding axle and movable coil fixed connection, the direction bearing includes bearing frame, bush and a plurality of ball, the bush cover is established in the bearing frame, the guiding axle sleeve is established in the bush, and a plurality of balls set up between bush and the bearing frame and encircle along selected pitch arc orbit the bush distributes, each the equal free rotation of ball, the bush can take place for bearing frame, guiding axle along the ascending linear motion of self axial direction and along the ascending rotary motion of self circumference direction.
In one embodiment, the plurality of balls are combined to form a plurality of ball groups, the plurality of ball groups are arranged at intervals along the circumferential direction of the bushing, and the plurality of balls included in each ball group are distributed at intervals along an arc track.
In one embodiment, the plurality of balls included in each ball group are spaced along a spiral track.
In one embodiment, on a orthographic projection of the pattern in the radial direction of the liner, the helical locus of each of the ball sets is at an acute angle, preferably 30-60 °, to the axial direction of the liner.
In one embodiment, a plurality of the ball groups are arranged at equal intervals along the circumferential direction of the bushing, and a plurality of balls contained in the same ball group are distributed at equal intervals on the selected spiral track.
In one embodiment, the bushing has a first surface and a second surface which are oppositely arranged, the second surface faces the bearing seat, and the second surface is provided with a plurality of ball grooves, each ball is correspondingly arranged in one of the ball grooves and can freely rotate, and parts of the balls are exposed from the ball grooves at second notches on the second surface and can be in rolling contact with the bearing seat, wherein the diameter of the second notches is smaller than that of the balls.
In a specific embodiment, a plurality of ball groove sets are arranged on the second surface, the ball groove sets are arranged at intervals along the circumferential direction of the bushing, and the ball groove sets included in each ball groove set are distributed at intervals along an arc track.
In one embodiment, each of the ball groove sets comprises a plurality of ball groove sets spaced along a helical path.
In one embodiment, the first face of the bushing is in sliding contact with the guide shaft.
In one embodiment, the ball groove further forms a first notch communicating with the ball groove on the first surface, and a portion of the ball is exposed from the first notch and can be in rolling contact with the guide shaft, wherein the diameter of the first notch is smaller than that of the ball.
In a specific implementation case, both ends of the bearing seat are provided with a limiting ring, a limiting space is defined among the bearing seat, the limiting ring and the guide shaft, and the bushing is limited in the limiting space.
In one embodiment, the guide shaft, the bushing and the bearing seat are coaxially arranged.
The embodiment of the utility model provides an electric vibration table is still provided, including the shaking table stage body, movable coil and electric vibration table's movable coil lower part guider, the movable coil passes through on the movable coil lower part guider installation shaking table stage body.
As will be described in detail below with reference to the accompanying drawings and specific embodiments, it should be noted that the embodiments of the present invention are intended to explain and explain the structure and the working principle of the moving coil lower guide device of the electric vibration table, and the size, material and the like of each component member are not limited and described herein.
Example 1
Referring to fig. 1-2, an electric vibration table includes a vibration table body, a moving coil 100, a moving coil lower guide device, and other components of the electric vibration table (e.g., a driving coil, a field coil, etc.), wherein the moving coil 100 is mounted on the vibration table body via the moving coil lower guide device.
In this embodiment, referring to fig. 2 to 4, the lower guide device of the moving coil includes a guide shaft 200 and a guide bearing 300, the guide shaft 200 is fixedly connected to the moving coil 100, the guide bearing 300 includes a bearing seat 310, a bushing 320 and a plurality of balls 330, the bearing seat 310 is fixed on the table body of the vibration table, the bushing 320 is sleeved in the bearing seat 310, the guide shaft 200 is sleeved in the bushing 320, the plurality of balls 330 are disposed between the bushing 320 and the bearing seat 310 and distributed around the bushing 320 along a selected arc track, each of the balls 330 is freely rotatable, and the bushing 320 can perform linear motion in its own axial direction and rotational motion in its own circumferential direction with respect to the bearing seat 310 and the guide shaft 200.
In this embodiment, a plurality of balls 330 are disposed between the bushing 320 and the bearing seat 310 and surround the bushing 320 along a spiral track, wherein the bushing 320 is a cylindrical tubular structure as a whole, and the plurality of balls 330 are distributed in the spiral track in the circumferential and axial directions of the bushing 320, so that the contact area between the bushing 320 and the bearing seat 310 is more uniformly distributed (the contact area between the bushing 320 and the bearing seat 310 is distributed in both the circumferential and axial directions), and not only is the resistance between the bushing 320 and the bearing seat 310 when performing relative linear motion and rotational motion smaller, but also the relative motion between the bushing 320 and the bearing seat 310 is smoother, and moreover, the balls 330 are in rolling contact with the bushing 320 and the bearing seat 310, so that the friction loss between the balls 330 and the bushing 320 and the bearing seat 310 can be further reduced, for example, on a forward projected pattern along the radial direction of the bushing, an angle between the spiral track of each ball group and the axial direction of the bushing is an acute angle, preferably 30-60 °.
In this embodiment, the balls 330 are combined to form a plurality of ball groups, the plurality of ball groups are arranged at intervals along the circumferential direction of the bushing 320, the balls 330 included in each ball group are distributed at intervals along a spiral track, wherein the distance between two adjacent ball groups is greater than or equal to two times of the ball diameter and less than or equal to three times of the ball diameter, and the distance between two adjacent balls is greater than or equal to one time of the ball diameter and less than or equal to two times of the ball diameter, so that the bushing 320 and the bearing seat 310 can simultaneously generate relative linear motion and rotational motion, and the motion resistance between the bushing 320 and the bearing seat 310 is smaller and the motion is smoother.
In the present embodiment, a plurality of the ball groups are arranged at equal intervals in the circumferential direction of the liner 320, and a plurality of balls 330 included in the same ball group are distributed at equal intervals on a selected spiral track.
In this embodiment, the bushing 320 has a first surface and a second surface opposite to each other, the second surface faces the bearing seat 310, and a plurality of ball grooves are disposed on the second surface, each ball 330 is disposed in one of the ball grooves, the contour shape of the ball groove matches the contour shape of the ball 330, and the diameter of the ball groove is slightly larger than that of the ball 330, so that the ball 330 can freely rotate in the ball groove, wherein a portion of the ball 330 is exposed from the ball groove at a second notch on the second surface, and the diameter of the second notch is smaller than that of the ball 330; in the radial direction of the bushing 320 or the bearing seat 310, there is a first gap between the bearing seat 310 and the bushing 320, and the exposed portion of the ball 330 from the second notch can be in rolling contact with the bearing seat 310, so that relative linear and rotational movement can occur between the bushing 320 and the bearing seat 310.
In this embodiment, a plurality of ball groove groups are disposed on the second surface of the bushing, the plurality of ball groove groups are disposed at intervals along the circumferential direction of the bushing 320, the plurality of ball groove groups included in each ball groove group are all disposed at intervals along a spiral track, as mentioned above, each ball is correspondingly disposed in one ball groove, and the configuration of the plurality of ball groove groups is the same as the parameter configuration of the plurality of ball groups, for example, the distance between the ball groove groups and the distance between the ball grooves are the same as the parameter configuration of the plurality of ball groups, which is not repeated herein.
In this embodiment, a first surface of the bushing 320 is in sliding contact with the guide shaft 200, and two ends of the bearing seat 310 are each further provided with a limit ring 340, a limit space 301 is defined among the bearing seat 310, the limit rings 340 and the guide shaft 200, and the bushing 320 is limited in the limit space 301.
In this embodiment, the limiting ring 340 may be in sliding contact with the guide shaft 200, or a gap may be formed between the limiting ring 340 and the guide shaft 200, and the gap between the limiting ring 340 and the guide shaft 200 is smaller than the thickness of the bushing 320, so that the bushing 320 may not be removed from the limiting space 301.
In this embodiment, the guide shaft 200, the bushing 320, and the bearing seat 310 are coaxially disposed, and the guide shaft 200 and the moving coil 100 are coaxially disposed.
Example 2
Referring to fig. 1-2, an electric vibration table includes a vibration table body, a moving coil 100, a moving coil lower guide device, and other components of the electric vibration table (e.g., a driving coil, a field coil, etc.), wherein the moving coil 100 is mounted on the vibration table body via the moving coil lower guide device.
In this embodiment, referring to fig. 2 to 4, the lower guide device of the moving coil includes a guide shaft 200 and a guide bearing 300, the guide shaft 200 is fixedly connected to the moving coil 100, the guide bearing 300 includes a bearing seat 310, a bushing 320 and a plurality of balls 330, the bearing seat 310 is fixed on the table body of the vibration table, the bushing 320 is sleeved in the bearing seat 310, the guide shaft 200 is sleeved in the bushing 320, the plurality of balls 330 are disposed between the bushing 320 and the bearing seat 310 and distributed around the bushing 320 along a selected arc track, each of the balls 330 is freely rotatable, and the bushing 320 can perform linear motion in its own axial direction and rotational motion in its own circumferential direction with respect to the bearing seat 310 and the guide shaft 200.
In this embodiment, the plurality of balls 330 are disposed between the bushing 320 and the bearing housing 310 and surround the bushing 320 along a spiral track, wherein the bushing 320 is a cylindrical tubular structure as a whole, and the plurality of balls 330 are distributed in the spiral track in the circumferential direction and the axial direction of the bushing 320, so that the contact area between the bushing 320 and the bearing housing 310 is more uniformly distributed (the contact area between the bushing 320 and the bearing housing 310 is distributed in both the circumferential direction and the axial direction), and not only is the resistance between the bushing 320 and the bearing housing 310 when the bushing 320 and the bearing housing 310 perform relative linear motion and rotational motion smaller, but also the relative motion between the bushing 320 and the bearing housing 310 is smoother, and moreover, the balls 330 are in rolling contact with the bushing 320 and the bearing housing 310, so that the friction loss between the balls 330 and the bushing 320 and the bearing housing 310 can be further reduced.
In this embodiment, the balls 330 are combined to form a plurality of ball groups, the plurality of ball groups are arranged at intervals along the circumferential direction of the bushing 320, the balls 330 included in each ball group are distributed at intervals along a spiral track, wherein the distance between two adjacent ball groups is greater than or equal to two times of the ball diameter and less than or equal to three times of the ball diameter, and the distance between two adjacent balls is greater than or equal to one time of the ball diameter and less than or equal to two times of the ball diameter, so that the bushing 320 and the bearing seat 310 can simultaneously generate relative linear motion and rotational motion, and the motion resistance between the bushing 320 and the bearing seat 310 is smaller and the motion is smoother.
In the present embodiment, a plurality of the ball groups are arranged at equal intervals in the circumferential direction of the liner 320, and a plurality of balls 330 included in the same ball group are distributed at equal intervals on a selected spiral track.
In this embodiment, the bushing 320 has a first surface and a second surface opposite to each other, the second surface faces the bearing seat 310, and a plurality of ball grooves are disposed on the second surface, each ball 330 is disposed in one of the ball grooves, the contour shape of the ball groove matches the contour shape of the ball 330, and the diameter of the ball groove is slightly larger than that of the ball 330, so that the ball 330 can freely rotate in the ball groove, wherein a portion of the ball 330 is exposed from the ball groove at a second notch on the second surface, and the diameter of the second notch is smaller than that of the ball 330; in the radial direction of the bushing 320 or the bearing housing 310, there is a first gap between the bearing housing 310 and the bushing 320, and the exposed portion of the ball 330 from the second notch can be in rolling contact with the bearing housing 310, thereby enabling relative linear and rotational movement between the bushing 320 and the bearing housing 310.
In this embodiment, a plurality of ball groove groups are disposed on the second surface of the bushing, the plurality of ball groove groups are disposed at intervals along the circumferential direction of the bushing 320, each of the plurality of ball groove groups includes a plurality of ball groove groups that are disposed at intervals along a spiral track, as mentioned above, each of the plurality of balls is disposed in one of the plurality of ball grooves, and the configuration of the plurality of ball groove groups is the same as the configuration of the plurality of ball groups, for example, the distance between the ball groove groups and the distance between the ball grooves are the same as the configuration of the plurality of ball groups, and will not be described herein again.
In this embodiment, the ball groove further forms a first notch communicating with the ball groove on the first surface, a portion of the ball 330 is exposed from the first notch and can be in rolling contact with the guide shaft 200, wherein the diameter of the first notch is smaller than the diameter of the ball 330, the thickness of the bushing 320 is smaller than the diameter of the ball 330, preferably, the thickness of the bushing is greater than or equal to 1/2 of the diameter of the ball and less than or equal to 2/3 of the diameter of the ball, so that the rolling motion can be smoother, and the abrasion of the ball to the bearing base and the guide shaft can be reduced.
In this embodiment, the distance between the bearing seat and the guide shaft is substantially equal to the diameter of the ball, and the ball rolls in contact with at least one of the bearing seat and the guide shaft.
In this embodiment, both ends of the bearing seat 310 are further provided with a limiting ring 340, a limiting space 301 is defined between the bearing seat 310, the limiting ring 340 and the guide shaft 200, and the bushing 320 is limited in the limiting space 301.
In this embodiment, the limiting ring 340 may be in sliding contact with the guide shaft 200, or a gap may be formed between the limiting ring 340 and the guide shaft 200, and the gap between the limiting ring 340 and the guide shaft 200 is smaller than the thickness of the bushing 320, so that the bushing 320 may not be removed from the limiting space 301.
In this embodiment, the guide shaft 200, the bushing 320, and the bearing seat 310 are coaxially disposed, and the guide shaft 200 and the moving coil 100 are coaxially disposed.
The embodiment of the utility model provides a pair of moving coil lower part guider of electric vibration table, the bush can be under the effect of ball, can be in the inside free slip from top to bottom of bearing frame, do in circumferencial direction free rotation slip, be sharp vertical range than current ordinary linear bearing's ball, and the wearing and tearing of guiding axle can be quickened to the ball among the linear bearing, can grind out the slot along the axial direction of guiding axle, influence the index of shaking table, the embodiment of the utility model provides a ball among the moving coil lower part guider is 360 equipartitions of circumference, can free rotation to can reduce the friction loss between ball and bearing frame, the guiding axle, and, the contact point distribution between bearing frame, bush, ball and the guiding axle is more even, and the atress of guiding axle is more even, and the motion between bearing frame, bush and the guiding axle is more smooth.
The embodiment of the utility model provides a pair of moving coil lower part guider of electric vibration table can 360 free rotations, and the atress on the circumferencial direction is even, can effectively solve the wearing and tearing problem of the fixed direction of guiding axle.
It should be understood that the above-mentioned embodiments are merely illustrative of the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, and therefore, the protection scope of the present invention should not be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A lower guide device for a moving coil of an electric vibration table is characterized by comprising: the guide shaft is fixedly connected with the moving coil, the guide bearing comprises a bearing seat, a bushing and a plurality of balls, the bushing is sleeved in the bearing seat, the guide shaft is sleeved in the bushing, the plurality of balls are arranged between the bushing and the bearing seat and surround the bushing along a selected arc track, each ball can rotate freely, and the bushing can move linearly along the axial direction of the bushing and rotate along the circumferential direction of the bushing relative to the bearing seat and the guide shaft.
2. The moving coil lower guide apparatus according to claim 1, wherein: the plurality of balls are combined to form a plurality of ball groups, the plurality of ball groups are arranged at intervals along the circumferential direction of the bushing, and the plurality of balls contained in each ball group are distributed at intervals along an arc track;
and/or the balls contained in each ball group are distributed at intervals along a spiral track.
3. The moving coil lower guide apparatus according to claim 2, wherein: the plurality of ball groups are arranged at equal intervals along the circumferential direction of the bush, and the plurality of balls included in the same ball group are distributed at equal intervals on a selected spiral track.
4. The moving coil lower guide apparatus as set forth in claim 2, wherein: the bush is provided with a first face and a second face which are arranged back to back, the second face faces the bearing seat, in addition, a plurality of ball grooves are arranged on the second face, each ball is correspondingly arranged in one ball groove and can rotate freely, the part of each ball is exposed from a second notch of the ball groove on the second face and can be in rolling contact with the bearing seat, and the diameter of the second notch is smaller than that of each ball.
5. The moving coil lower guide apparatus according to claim 4, wherein: the second surface is provided with a plurality of ball groove groups which are arranged at intervals along the circumferential direction of the bushing, and the plurality of ball groove groups contained in each ball groove group are distributed at intervals along an arc line track;
and/or a plurality of ball groove groups contained in each ball groove group are distributed at intervals along a spiral track.
6. The moving coil lower guide apparatus according to claim 4, wherein: the first surface of the bushing is in sliding contact with the guide shaft.
7. The moving coil lower guide apparatus according to claim 4, wherein: the ball groove is formed with a first notch communicated with the ball groove on the first surface, the part of the ball is exposed from the first notch and can be in rolling contact with the guide shaft, and the diameter of the first notch is smaller than that of the ball.
8. The moving coil lower guide apparatus according to claim 1, wherein: the two ends of the bearing seat are respectively provided with a limiting ring, a limiting space is formed by enclosing the bearing seat, the limiting rings and the guide shaft, and the bushing is limited in the limiting space.
9. The moving coil lower guide apparatus according to claim 1, wherein: the guide shaft, the bushing and the bearing seat are coaxially arranged.
10. An electric vibration table, characterized by comprising a vibration table body, a moving coil and a moving coil lower guide device of the electric vibration table of any one of claims 1 to 9, wherein the moving coil is mounted on the vibration table body through the moving coil lower guide device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221651757.3U CN217586230U (en) | 2022-06-29 | 2022-06-29 | Moving coil lower part guiding device of electric vibration table and electric vibration table |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221651757.3U CN217586230U (en) | 2022-06-29 | 2022-06-29 | Moving coil lower part guiding device of electric vibration table and electric vibration table |
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| CN217586230U true CN217586230U (en) | 2022-10-14 |
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| CN202221651757.3U Active CN217586230U (en) | 2022-06-29 | 2022-06-29 | Moving coil lower part guiding device of electric vibration table and electric vibration table |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118002454A (en) * | 2024-04-09 | 2024-05-10 | 苏州东菱振动试验仪器有限公司 | Self-compensating type large vibrating table moving coil guiding device and working method thereof |
-
2022
- 2022-06-29 CN CN202221651757.3U patent/CN217586230U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118002454A (en) * | 2024-04-09 | 2024-05-10 | 苏州东菱振动试验仪器有限公司 | Self-compensating type large vibrating table moving coil guiding device and working method thereof |
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