CN109100106B

CN109100106B - Electric linear vibration platform

Info

Publication number: CN109100106B
Application number: CN201811026727.1A
Authority: CN
Inventors: 林梅
Original assignee: Suzhou Shengtuo Semiconductor Technology Co ltd
Current assignee: Suzhou Shengtuo Semiconductor Technology Co ltd
Priority date: 2018-09-04
Filing date: 2018-09-04
Publication date: 2024-04-19
Anticipated expiration: 2038-09-04
Also published as: CN109100106A

Abstract

The invention provides an electric linear vibration platform. The electric linear vibration platform can comprise a platform base, an excitation device, a clamping device and a controller, wherein the platform base consists of an upper base, a lower base, a left base and a right base, the excitation device comprises a left linear motor unit, a right linear motor unit and an excitation rod, the left linear motor unit and the right linear motor unit are respectively fixed on the left base and the right base, the movers of the left linear motor unit and the right linear motor unit are hinged with each other through a first flexible hinge, the excitation rod is hinged with the first flexible hinge through a second flexible hinge and extends upwards to move through the upper base, the clamping device comprises a left guide post and a right guide post which are fixed on the upper base and extend upwards and a test piece clamp which is slidably sleeved on the left guide post, and the controller is used for controlling the vibration frequency of the excitation rod. The invention realizes high thrust by the combined output of a plurality of linear motors and can realize high-frequency vibration.

Description

Electric linear vibration platform

Technical Field

The invention relates to the field of linear motors, in particular to an electric linear vibration platform.

Background

The electric linear vibration test bed product is suitable for vibration test of samples in laboratories and production lines of industries such as automobiles, electronic components, assemblies, electromechanical products, instruments and meters and the like. Most of the vibrating tables with large thrust in the industry are hydraulic vibrating tables, the vibrating frequency is low, the vibrating response is slow, and the actual vibrating conditions cannot be effectively and comprehensively simulated.

Disclosure of Invention

The invention aims to provide an electric linear vibration platform which can provide high thrust and can realize high-frequency vibration, and is mainly used for experiments.

In order to achieve the above object, the present invention provides an electric linear vibration platform, which may include a platform base, an excitation device, a clamping device, and a controller, wherein the platform base is composed of an upper base, a lower base, a left base, and a right base, the excitation device includes a left linear motor unit, a right linear motor unit, and an excitation rod, the left linear motor unit and the right linear motor unit are respectively fixed on the left base and the right base, the mover of the left linear motor unit and the mover of the right linear motor unit are hinged to each other through a first flexible hinge, the excitation rod is hinged to the first flexible hinge through a second flexible hinge and extends upward to move through the upper base, the clamping device includes left and right guide posts fixed on the upper base and extending upward, and a test piece clamp slidably sleeved on the left and right guide posts, and the controller is used for controlling the vibration frequency of the excitation rod.

In an embodiment, the left linear motor group and the right linear motor group are formed by rigidly connecting two linear motor modules in parallel. Specifically, the two linear motor modules may include a motor fixing seat, two guide rails, two stators and two movers, where the motor fixing seat is fixed on the inner side of the left base or the right base, the two guide rails are respectively fixed on the front and the back of the motor fixing seat, each guide rail has two sliding blocks for guiding the movers to slide along the guide rails, the two stators are respectively fixed on the front and the back of the motor fixing seat, and the inner sides of the two movers are rigidly connected through a connecting plate.

In this embodiment, the first flexible hinge includes a rotating shaft and two end face ball bearings, the two end face ball bearings are respectively mounted on the left and right connecting plates, two ends of the rotating shaft are respectively mounted on the two end face ball bearings, the second flexible hinge includes a middle end face ball bearing and a bearing seat thereof, the middle end face ball bearing is mounted on the middle position of the rotating shaft, and the lower end of the excitation rod is fixed on the bearing seat.

In this embodiment, the two movers are further fixed with a motor cover plate respectively, and two ends of the connecting plate are fixed on the motor cover plates of the two movers respectively. Namely, the two movers are rigidly connected through the motor cover plate and the connecting plate. More specifically, the motor cover plate and the connecting plate form a generally U-shaped structure.

In this case, the motor cover plate and the connection plate may be fixedly connected by screws or integrally formed. Of course, the motor cover plate and the connecting plate may also be fixed together by welding.

Preferably, the motor cover plate is provided with a plurality of hollowed-out holes, so that the weight of the motor cover plate can be reduced, and the heat dissipation of the motor can be facilitated.

In an embodiment, a guide shaft sleeve is installed in the upper base, and the excitation rod penetrates through the guide shaft sleeve. Therefore, the excitation rod can vertically move up and down.

In an embodiment, the lower surface of the upper base and the upper surface of the lower base are further provided with a limit buffer pad. The limit buffer cushion can protect the overshoot of the motor.

In an embodiment, the electric linear vibration platform may further include a position feedback device mounted on the left and right bases and electrically connected to the controller for detecting the position of the mover. Thus, closed loop control of the mover position may be achieved by the controller.

Preferably, the upper base, the lower base, the left base and the right base may be fixed together by screws to form the platform base. This facilitates the installation of the electrodynamic linear vibration platform.

In an embodiment, the electric linear vibration platform may further include left and right side covers located outside and spaced apart from the left and right bases. The left and right side covers can be provided with cable clamps, wiring terminals and the like.

In one embodiment, four adjustable foot pads symmetrically distributed can be further installed on the lower base. This can ensure that the electric linear vibration platform is placed horizontally.

By adopting the technical proposal, the invention has the beneficial effects that,

1. The left two linear motor modules are rigidly connected, the right two linear motor modules are rigidly connected, the motors on the left and right sides are connected through the first flexible hinge, high-thrust vibration is realized through the four motors, and the problem of motion locking caused by asynchronous output of the motors on the two sides can be avoided through the connection of the flexible hinge;

2. the excitation rod is connected to the four motors through the second flexible hinges and realizes vertical movement through the guide shaft sleeve, so that the movement of the excitation rod cannot be influenced by the asynchronism of the motors and the like;

3. The linear vibration platform realized by the linear motor mode has high vibration frequency and accurate position;

4. The test piece clamp can vertically lift to realize clamping of different test pieces.

Drawings

Fig. 1 is a perspective view of an electric linear vibration platform according to an embodiment of the present invention;

FIG. 2 is an exploded perspective view of the electric linear vibration platform shown in FIG. 1;

FIG. 3 is a front view of the electric linear vibration platform shown in FIG. 1;

FIG. 4 is a cross-sectional view of the electric linear vibration platform taken along the direction A-A of FIG. 3;

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings, so that the objects, features and advantages of the present invention will be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the invention, but rather are merely illustrative of the true spirit of the invention.

In the following description, for the purposes of explanation of various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment may be practiced without one or more of the specific details. In other instances, well-known devices, structures, and techniques associated with the present application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, unless the context requires otherwise, the word "comprise" and variations such as "comprises" and "comprising" will be understood to be open-ended, meaning of inclusion, i.e. to be interpreted to mean "including, but not limited to.

Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and/or" unless the context clearly dictates otherwise.

In the following description, for the purposes of clarity of presentation of the structure and manner of operation of the present invention, the description will be made with the aid of directional terms, but such terms as "forward," "rearward," "left," "right," "outward," "inner," "outward," "inward," "upper," "lower," etc. are to be construed as convenience, and are not to be limiting.

As shown in fig. 1 to 4, an electric linear vibration table 1 may include a table base 10, an excitation device 20, a clamping device 30, a controller (not shown), and the like. The platform base 10 is composed of an upper base 110, a lower base 120, a left base 130, and a right base 140. Specifically, the upper base 110, the lower base 120, the left base 130, and the right base 140 are fixedly connected by screws into a rectangular frame (platform base 10). The excitation device 20, the clamping device 30, and the like of the electric linear vibration platform 1 are mounted on the platform base 10. In the illustrated embodiment, the upper base 110, the lower base 120, the left base 130, and the right base 140 are rectangular steel plates having a certain thickness. The excitation device 20 includes a left linear motor unit 210, a right linear motor unit 220, and an excitation rod 230. Wherein the left and right linear motor units 210 and 220 are fixed to the left and right bases 130 and 140, respectively, and the movers thereof are hinged to each other by a first flexible hinge 240. The excitation rod 230 is hinged to the first flexible hinge 240 by a second flexible hinge 250 and extends upwardly to move through the upper base 110. Accordingly, the excitation rod 230 can realize a high thrust vibration by the left and right linear motor sets 210 and 220. The clamping device 30 includes left and right guide posts 310 fixed to the upper base 110 and extending upward, and a specimen holder 320 slidably fitted over the left and right guide posts 310. Therefore, the specimen holder 320 can vertically lift along the left and right guide posts 310, thereby realizing the clamping of different specimens (not shown). Preferably, lower ends of the left and right guide posts 310 are fixed to the upper base 110 by corresponding bases 311. The controller is used to control the vibration frequency of the excitation rod 230. Specifically, the controller controls the vibration frequency of the excitation rod 230 by controlling the excitation frequency of the coil of the linear motor group.

As shown in fig. 2, the left and right linear motor units 210 and 220 are each formed by rigidly connecting two linear motor modules in parallel. Specifically, the two linear motor modules on the left and right sides may each include a motor fixing base 211, two guide rails 212 (only the front side is shown), and two movers 213 (only the front side is shown), wherein only the components of the left motor group 210 are denoted by reference numerals for clarity; and a left motor group 210 will be described as an example. The left motor fixing base 211 is fixed (e.g., by screws) to the inner side of the left base 130; two left guide rails 212 are respectively fixed on the front and back sides of the seat motor fixing seat 211, and each left guide rail 212 is provided with two left sliding blocks 214 for guiding a corresponding left rotor 213 to slide along the left guide rail 212; the two stators are also respectively fixed on the front and back sides of the motor fixing seat 211; the inner sides of the two left movers 213 are rigidly connected by a left connecting plate 215. Therefore, the four motors on the left and right sides can realize high-thrust vibration.

In addition, in the illustrated embodiment, a motor cover plate 216 is further fixed to each of the two movers 213, and two ends of the connecting plate 215 are respectively fixed to the corresponding motor cover plates 216 of the two movers 213. Namely, the front and rear two movers 213 are rigidly connected by the motor cover plate 216 and the connecting plate 215. More specifically, the motor cover 216 and the connecting plate 215 form a generally U-shaped structure.

In this case, the motor cover 216 and the connection plate 215 may be fixedly connected by screws. This facilitates the mounting and securing of the motor cover plate 216 and the connecting plate 215. Of course, the motor cover plate 216 and the connecting plate 215 may be integrally formed or fixed together by welding.

Preferably, the motor cover 216 is provided with a plurality of hollow holes 2161, which can reduce the weight of the motor cover on one hand and can help the motor to dissipate heat on the other hand. The hollowed-out hole 2161 may be a round hole and/or a rectangular hole, etc.

Further, as shown in fig. 2-4, the first flexible hinge 240 includes a rotating shaft 241 and two end face ball bearings 242, the two end face ball bearings 242 are respectively mounted on the left and right connecting plates 215, and two ends of the rotating shaft 241 are respectively mounted on the two end face ball bearings 242. The end ball bearing 242 allows the rotary shaft 241 to twist left and right. Therefore, the connection of the first flexible hinge can avoid the problem of motion jam caused by asynchronous output of the left and right motor sets 210, 220. The second flexible hinge 250 includes a middle end face ball bearing 251 and a bearing housing 252 thereof, the middle end face ball bearing 251 being mounted on a middle position of the rotation shaft 241, i.e., the two end face ball bearings 242 are symmetrically distributed with respect to the middle end face ball bearing 251; the lower end of the excitation rod 230 is fixed (e.g., screwed) to a bearing housing 252. Therefore, the movement of the excitation rod 230 is not affected by the non-synchronization of the left and right motor groups 210, 220, and the like.

As shown in fig. 1 and 2, a guide sleeve 231 is installed in the upper base 110, and the excitation rod 230 is inserted into the guide sleeve 231. Accordingly, the excitation rod 230 may vertically move up and down (i.e., vertically vibrate).

With further reference to fig. 1 and 2, the lower surface of the upper base 110 and the upper surface of the lower base 120 are also provided with a limit bumper pad 40. The limit bumper pad 40 can protect overshooting of the motors (movers) of the left and right motor groups 210, 220.

In addition, the electric linear vibration platform 1 may further include a position feedback device (not shown) mounted on the left and right bases and electrically connected to the controller for detecting the position of the mover. Thus, closed loop control of the motor (mover) position of the left and right motor groups 210, 220 may be achieved by the controller.

Furthermore, as shown in fig. 1 and 2, the electric linear vibration platform 1 may further include two side covers 50, and the two side covers 50 are respectively located outside and spaced apart from the left and right bases 130, 140. Cable clamps, terminals, etc. may be mounted to the side housing 50.

In addition, as shown in fig. 2, four adjustable foot pads 60 may be symmetrically disposed on the lower base 120. By adjusting the height of the foot pad 60, the electric linear vibration platform 1 can be ensured to be horizontally placed.

While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

Claims

1. An electric linear vibration platform which is characterized in that: the device comprises a platform base, an excitation device, a clamping device and a controller, wherein the platform base consists of an upper base, a lower base, a left base and a right base, the excitation device comprises a left linear motor unit, a right linear motor unit and an excitation rod, the left linear motor unit and the right linear motor unit are respectively fixed on the left base and the right base, a rotor of the left linear motor unit and a rotor of the right linear motor unit are hinged with each other through a first flexible hinge, the excitation rod is hinged with the first flexible hinge through a second flexible hinge and extends upwards to move through the upper base, the clamping device comprises a left guide post and a right guide post which are fixed on the upper base and extend upwards, a test piece clamp which is sleeved on the left guide post and the right guide post in a sliding manner, and the controller is used for controlling the vibration frequency of the excitation rod; the left linear motor group and the right linear motor group are formed by rigidly and parallelly connecting two linear motor modules.

2. An electrodynamic linear vibration platform as claimed in claim 1, wherein: the two linear motor modules comprise a motor fixing seat, two guide rails, two stators and two movers, wherein the motor fixing seat is fixed on the inner side of the left base or the right base, the two guide rails are respectively fixed on the front side and the back side of the motor fixing seat, each guide rail is provided with two sliding blocks for guiding the movers to slide along the guide rails, the two stators are respectively fixed on the front side and the back side of the motor fixing seat, and the inner sides of the two movers are rigidly connected through a connecting plate.

3. An electrodynamic linear vibration platform as claimed in claim 2, wherein: the first flexible hinge comprises a rotating shaft and two end face ball bearings, the two end face ball bearings are respectively arranged on the left connecting plate and the right connecting plate, two ends of the rotating shaft are respectively arranged on the two end face ball bearings, the second flexible hinge comprises a middle end face ball bearing and a bearing seat thereof, the middle end face ball bearing is arranged on the middle position of the rotating shaft, and the lower end of the excitation rod is fixed on the bearing seat.

4. An electrodynamic linear vibration platform as claimed in claim 2, wherein: the two movers are also respectively fixed with a motor cover plate, and two ends of the connecting plate are respectively fixed on the motor cover plates of the two movers.

5. The electrodynamic linear vibration platform of claim 4, wherein: and a plurality of hollowed-out holes are formed in the motor cover plate.

6. An electrodynamic linear vibration platform as claimed in claim 1, wherein: the upper base is internally provided with a guide shaft sleeve, and the excitation rod penetrates through the guide shaft sleeve.

7. An electrodynamic linear vibration platform as claimed in claim 1, wherein: the electric linear vibration platform further comprises a position feedback device, wherein the position feedback device is arranged on the left base and the right base and is electrically connected with the controller, and the position feedback device is used for detecting the position of the rotor.

8. An electrodynamic linear vibration platform as claimed in claim 1, wherein: the upper base, the lower base, the left base and the right base are fixed together by screws to form the platform base.

9. An electrodynamic linear vibration platform as claimed in claim 1, wherein: the electric linear vibration platform further comprises left and right side covers which are positioned outside the left and right bases and are spaced apart from the left and right bases.