CN221145788U

CN221145788U - Electric displacement table

Info

Publication number: CN221145788U
Application number: CN202322861013.5U
Authority: CN
Inventors: 金新刚
Original assignee: Jiaxing Xurui Electronic Technology Co ltd
Current assignee: Jiaxing Xurui Electronic Technology Co ltd
Priority date: 2023-10-24
Filing date: 2023-10-24
Publication date: 2024-06-14
Anticipated expiration: 2033-10-24

Abstract

The utility model discloses an electric displacement table, which comprises a base, a screw rod, a driving mechanism, a first displacement platform and a second displacement platform, wherein the screw rod is rotatably arranged on the base, the driving mechanism is used for driving the screw rod to rotate around the axis of the screw rod, the first displacement platform is slidably arranged on the base, the second displacement platform is used for arranging a load, and the screw rod passes through the first displacement platform and is in threaded connection with the first displacement platform; the first displacement platform and the second displacement platform are adjacently arranged in a contactless manner; the electric displacement table further includes: the guide rod is arranged in parallel with the lead screw, passes through the first displacement platform and is in sliding connection with the first displacement platform; and the elastic piece is used for connecting the first displacement platform and the second displacement platform so that the second displacement platform moves along with the first displacement platform.

Description

Electric displacement table

Technical Field

The utility model relates to the technical field of optics, in particular to an electric displacement table.

Background

The electric displacement table is high in accuracy, high in controllability, high in practicability and stable in performance, so that the electric displacement table is widely applied to the fields of scientific research, optical implementation, laser application, full-automatic metering detection instrument equipment, industrial automation and the like.

The current electronic displacement platform, a high stable displacement platform for laser rangefinder is disclosed in chinese patent application number 202221830089.0, including the base, the mount table with move the platform, the both sides upper end of base is fixed with the guide rail, the upper end sliding connection of guide rail has the slider, and the one end of slider is fixed with the connecting plate, the one end that the slider was kept away from to the connecting plate is provided with moves the platform, the middle part both sides of moving the platform are fixed with the nut, and the middle part swing joint of nut has the lead screw, move the platform and pass through threaded connection between nut and the lead screw, and move and pass through connecting plate and slider and guide rail between be sliding connection.

Such a displacement table is usually bolted between the displacement table, the connection plate and the slide, whereby it is caused to be completely restricted in both directions perpendicular to the axial direction of the screw. Because the screw thread of the screw rod and the threaded hole of the displacement platform have slight errors, the screw thread cannot be guaranteed to be identical in size, and the displacement platform can slightly deviate. Meanwhile, the displacement platform is completely limited in three directions, so that the screw rod can be blocked or dead when the displacement platform is displaced, and vibration of the screw rod can be transmitted to the displacement platform.

Disclosure of utility model

The utility model aims to solve the technical problems of the prior art, and provides an electric displacement table which is used for limiting vibration transmission of a displacement platform and ensuring stability of the displacement platform.

The technical scheme adopted for solving the technical problems is as follows: an electric displacement table comprises a base, a screw rod rotatably arranged on the base, a driving mechanism for driving the screw rod to rotate around the axis of the screw rod, a first displacement platform slidingly arranged on the base and a second displacement platform at the position for setting a load, wherein the screw rod penetrates through the first displacement platform and is in threaded connection with the first displacement platform; the method is characterized in that:

the first displacement platform and the second displacement platform are adjacently arranged in a contactless manner;

The electric displacement table further includes:

The guide rod is arranged in parallel with the lead screw, passes through the first displacement platform and is in sliding connection with the first displacement platform; and

And the elastic piece is used for connecting the first displacement platform and the second displacement platform, so that the second displacement platform moves along with the first displacement platform.

The two displacement platforms are not in direct contact but are in flexible connection through the elastic piece, so that vibration of the screw rod cannot be transmitted to the second displacement platform from the first displacement platform, stability of the second displacement platform is guaranteed, and in addition, the second displacement platform can have a certain degree of freedom in the direction perpendicular to the axial direction of the screw rod through the flexible connection, and screw rod clamping or blocking can be prevented.

Further, in order to facilitate connection of the elastic member with the corresponding displacement platform, a first pin is disposed on the first displacement platform, a second pin is disposed on the second displacement platform, and the elastic member is connected to the first pin and the second pin.

Further, in order to facilitate the arrangement of the screw, the base is provided with screw seats, two screw seats are arranged at intervals along the axial direction of the screw, and two axial ends of the screw are in running fit with the screw seats.

Further, in order to support the guide rod conveniently, two ends of the guide rod penetrate into or pass through the screw rod seat at the corresponding position, and the guide rod is fixed with the screw rod seat.

Further, for the sliding connection of guide bar and first displacement platform of being convenient for, offer the first perforation that supplies the guide bar to pass on the first displacement platform, be provided with in the first perforation of first displacement platform with guide bar sliding fit's linear bearing.

Further, to ensure the height of the second displacement platform, the electric displacement platform further comprises support rods parallel to the screw rods and penetrating through the second displacement platform, the support rods are fixed with the second displacement platform, and the number of the support seats is two, and the support rods are slidably supported on the support seats.

Further, in order to stably support the support rod, the support base comprises a universal ball seat, the upper surface of the universal ball seat is sunken downwards to form a support groove, the cross section of the support groove is V-shaped, and the support rod is supported in the support groove.

Further, in order to facilitate the sliding of the support rod while supporting the support rod, the two bottom surfaces of the support groove forming a V shape gradually extend from top to bottom in a direction approaching each other in an inclined manner until being connected with each other, and each bottom surface is provided with a first universal ball bearing on which the support rod is supported.

Further, in order to avoid the movement of the supporting rod, a pressing block fixed with the universal ball seat is arranged on the supporting rod.

Further, in order to reduce the abrasion of the two displacement platforms, a second universal ball bearing is arranged on one side of the first displacement platform, a part of the second displacement platform is opposite to the second universal ball bearing, and a ceramic plate is arranged between the second universal ball bearing and the second displacement platform.

Compared with the prior art, the utility model has the advantages that: the two displacement platforms are not in direct contact but are in flexible connection through the elastic piece, so that vibration of the screw rod cannot be transmitted to the second displacement platform from the first displacement platform, stability of the second displacement platform is guaranteed, and in addition, the second displacement platform can have a certain degree of freedom in the direction perpendicular to the axial direction of the screw rod through the flexible connection, and screw rod clamping or blocking can be prevented.

Drawings

FIG. 1 is a schematic view of an electric displacement table according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a portion of an electric displacement table according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a partially exploded structure of a support base of an electric displacement table according to an embodiment of the present utility model;

fig. 4 is a schematic exploded view of two displacement platforms and a ceramic plate of the electric displacement platform according to an embodiment of the present utility model.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for purposes of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and because the disclosed embodiments of the present utility model may be arranged in different orientations, these directional terms are merely for illustration and should not be construed as limitations, such as "upper", "lower" are not necessarily limited to orientations opposite or coincident with the direction of gravity. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly.

Referring to fig. 1 to 4, an electric displacement table includes a base 1, a screw 2, a first displacement platform 3, a second displacement platform 4, a guide rod 5, a support rod 6, and a driving mechanism 7.

Wherein, lead screw 2 rotatably sets up on base 1 through lead screw seat 21, and lead screw seat 21 has two, arranges along the axial interval of lead screw 2, and the axial both ends and the lead screw seat 21 cooperation of lead screw 2 can set up central bearing (not shown) in the lead screw seat 21 and lead screw 2 normal running fit to play the effect of restriction lead screw 2 position, prevent radial float. The first displacement platform 3 is slidably arranged on the base 1, the first displacement platform 3 is positioned between the two screw rod seats 21, the screw rod 2 penetrates through the first displacement platform 3, and the screw rod 2 is in threaded connection with the first displacement platform 3. The driving mechanism 7 may be a motor for driving the screw 2 to rotate around its own axis, so that the first displacement platform 3 can move linearly along the axial direction of the screw 2 when the screw 2 rotates.

The guide rod 5 is parallel to the screw rod 2, both ends of the guide rod can also penetrate into or pass through the screw rod seat 21 at the corresponding position, and the guide rod 5 can be fixed with the screw rod seat 21. The first displacement platform 3 is provided with a first perforation 31 for the guide rod 5 to pass through, and a linear bearing 51 is arranged in the first perforation 31 of the first displacement platform 3, the guide rod 5 passes through the linear bearing 51 and is in sliding fit with the linear bearing 51, so that the first displacement platform 3 and the guide rod 5 are reliably in sliding connection. The guide bar 5 can function to prevent the first displacement stage 3 from rotating on a horizontal plane (XY plane in a coordinate system described below).

The electric displacement table further comprises supporting seats 8, one supporting seat 8 is arranged on one side, far away from the other screw seat 21, of each screw seat 21, two ends of each screw 2 can penetrate into the corresponding screw seat 21 and can penetrate into the supporting seats 8, and the driving mechanism 7 is arranged on one side, far away from the corresponding screw seat 21, of one supporting seat 8. The support rod 6 is in sliding fit with the support seat 8. The support seat 8 includes a base 81 and a universal ball seat 82 disposed on the base 81, and the base 81 and the universal ball seat 82 may be of an integral or separate structure. The upper surface of the universal ball seat 82 is recessed downward to form a support groove 821, and both ends of the support rod 6 extend into the support groove 821. The cross section of the supporting groove 821 is V-shaped, and two bottom surfaces 822 forming the V-shape gradually extend obliquely from top to bottom in directions approaching each other until being connected to each other. Each of the bottom surfaces 822 is provided with a first ball bearing 83, and the support bar 6 may be supported on the first ball bearings 83. A pressing block 85 fixed to the universal ball seat 82 may be provided on the support rod 6 to restrict upward movement of the support rod 6. The cooperation of bracing piece 6 and supporting seat 8 can guarantee the height of bracing piece 6.

The second through hole 84 can be formed in the base 81 of the supporting seat 8 without contacting the screw 2 with the supporting seat 8, and the end of the screw 2 penetrates into the second through hole 84 and is not contacted with the wall surface forming the second through hole 84, so as to prevent the vibration of the screw 2 from being transmitted to the supporting seat 8.

The second displacement platform 4 is located corresponding to the first displacement platform 3, and is adjacently located, for example, at least partially above the first displacement platform 3, and is located between two supporting seats 8, and loads such as optical devices needing to be adjusted are located on the second displacement platform 4. The above-mentioned support rods 6 pass through the second displacement platform 4 and are fixed to each other, whereby the support rods 6 and the second displacement platform 4 can slide synchronously.

An XYZ coordinate system is established, X axis, Y axis and Z axis are perpendicular to each other, Y axis is the axial direction of the screw rod 2, the X axis and Y axis form a horizontal plane, and Z axis is the vertical direction. The first displacement platform 3 may be in a convex shape, and the second displacement platform 4 is partially located at two sides (two sides in the X-axis direction) of the convex portion of the first displacement platform 3, so that the first displacement platform 3 may be provided with a first pin 32, the second displacement platform 4 may be provided with a second pin 42, and the first pin 32 and the second pin 42 are connected through an elastic member 33, such as a spring, so that a certain elastic deformation can be formed between the first displacement platform 3 and the second displacement platform 4 in the X-axis direction and the Z-axis direction, thereby preventing the screw rod 2 from being blocked or dead.

The part of the second displacement platform 4 is located between the first displacement platform 3 and the support seat 8, which support seat 8 is the one on the side remote from the drive mechanism 7. The first displacement platform 3 is provided with a second universal ball bearing 34 towards the side of the support seat 8, and a ceramic plate 10 is arranged between the second universal ball bearing 34 and the second displacement platform 4, so that friction of the two displacement platforms can be reduced.

Through the structure, the first displacement platform 3 and the second platform 4 are not in direct contact (the elastic piece 33 is flexibly connected), vibration of the screw rod 2 cannot be transmitted to the second displacement platform 4, and stability of the second displacement platform 4 is guaranteed.

Claims

1. An electric displacement table comprises a base (1), a screw rod (2) rotatably arranged on the base (1), a driving mechanism (7) for driving the screw rod (2) to rotate around the axis of the screw rod, a first displacement platform (3) slidingly arranged on the base (1) and a second displacement platform (4) at a position for arranging a load, wherein the screw rod (2) penetrates through the first displacement platform (3) and is in threaded connection with the first displacement platform (3); the method is characterized in that:

The first displacement platform (3) and the second displacement platform (4) are adjacently arranged in a contactless manner;

The electric displacement table further includes:

The guide rod (5) is arranged in parallel with the screw rod (2), and the guide rod (5) penetrates through the first displacement platform (3) and is in sliding connection with the first displacement platform (3); and

And the elastic piece (33) is used for connecting the first displacement platform (3) and the second displacement platform (4) so that the second displacement platform (4) moves along with the first displacement platform (3).

2. The motorized displacement table of claim 1, wherein: the first displacement platform (3) is provided with a first pin (32), the second displacement platform (4) is provided with a second pin (42), and the elastic piece (33) is connected to the first pin (32) and the second pin (42).

3. An electric displacement table according to claim 1 or 2, characterized in that: the base (1) is provided with screw bases (21), the screw bases (21) are two and are arranged at intervals along the axial direction of the screw (2), and two axial ends of the screw (2) are in rotary fit with the screw bases (21).

4. An electric displacement table according to claim 3, wherein: the two ends of the guide rod (5) penetrate into or pass through the screw rod seat (21) at the corresponding position, and the guide rod (5) is fixed with the screw rod seat (21).

5. An electric displacement table according to claim 1 or 2, characterized in that: the first displacement platform (3) is provided with a first perforation (31) for the guide rod (5) to pass through, and a linear bearing (51) in sliding fit with the guide rod (5) is arranged in the first perforation (31) of the first displacement platform (3).

6. An electric displacement table according to claim 1 or 2, characterized in that: the electric displacement table further comprises support rods (6) and support seats (8), the support rods (6) are parallel to the lead screws (2) and penetrate through the second displacement platform (4), the support rods (6) are fixed with the second displacement platform (4), the number of the support seats (8) is two, and the support rods (6) are slidably supported on the support seats (8).

7. The motorized displacement table of claim 6, wherein: the supporting seat (8) comprises a universal ball seat (82), the upper surface of the universal ball seat (82) is sunken downwards to form a supporting groove (821), the cross section of the supporting groove (821) is V-shaped, and the supporting rod (6) is supported in the supporting groove (821).

8. The motorized displacement table of claim 7, wherein: the two bottom surfaces (822) of the support groove (821) forming the V shape gradually extend from top to bottom in a direction approaching each other in an inclined manner until being connected with each other, a first universal ball bearing (83) is arranged on each bottom surface (822), and the support rod (6) is supported on the first universal ball bearing (83).

9. The motorized displacement table of claim 8, wherein: a pressing block (85) fixed with the universal ball seat (82) is arranged on the supporting rod (6).

10. An electric displacement table according to claim 1 or 2, characterized in that: one side of the first displacement platform (3) is provided with a second universal ball bearing (34), a part of the second displacement platform (4) is opposite to the second universal ball bearing (34), and a ceramic plate (10) is arranged between the second universal ball bearing (34) and the second displacement platform (4).