Machining platform capable of being automatically lifted and leveled
By setting up an automatic lifting mechanism on the processing platform, combined with the limiting unit and encoder control, the automatic leveling and height adjustment of the processing table during MicroLED display processing is realized, which solves the problem of automatic leveling in the existing technology and improves positioning accuracy and stability.
Patent Information
- Application Number
- CN202422211009.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The existing processing platform cannot achieve automatic leveling and height adjustment in MicroLED display processing, and cannot meet the high-precision flatness requirements.
At least three sets of automatic lifting mechanisms are adopted, combined with frameless motors, ball screws and ball splines, and semi-closed loop control is realized through the encoder, and the following limit and upper limit units are equipped to ensure the planeness and height adjustment of the processing table.
Automatic leveling and height adjustment of the processing platform is realized, positioning accuracy and stability are improved, and collision deformation caused by the tabletop beyond the stroke during lifting and lowering. It has a compact structure and a low center of gravity.
Smart Images
Figure CN223146240U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of laser precision machining, and particularly relates to a processing platform capable of automatically lifting and leveling. Background Art
[0002] During the process of conventional laser precision machining, the laser machining depth of focus is usually short. Therefore, the flatness of the processing platform where the product is located has relatively high coplanarity requirements with the laser machining focal plane. In the prior art, when using a fixed platform for installation, the flatness of the processing platform is generally adjusted by manual alignment, and then this processing table is placed on a lifting Z-axis so that the processing platform can be lifted along the Z-axis, or the laser machining head is fixed on a lifting Z-axis to adjust the relative distance between the laser machining head and the processing platform. However, in the panel MicroLED display processing industry, the parallelism of the processing platform needs to be adjusted at any time, but the existing processing platforms and adjustment methods cannot achieve automatic leveling. Summary of the Utility Model
[0003] In view of one or more of the above-mentioned defects or improvement requirements in the prior art, the present utility model provides a processing platform capable of automatically lifting and leveling, realizing automatic leveling and height adjustment of the processing platform.
[0004] To achieve the above object, the present utility model provides a processing platform capable of automatically lifting and leveling, including a fixed base and a processing table;
[0005] At least three groups of automatic lifting mechanisms are provided between the fixed base and the processing table, for driving the processing table to lift, thereby automatically adjusting the flatness and height of the processing table;
[0006] The automatic lifting mechanism includes a contact block and a lifting drive unit; the contact block is fixedly connected to the processing table, and the contact block has a downward-opening groove;
[0007] The lifting drive unit includes a frameless motor, a ball screw, and a ball spline; the frameless motor is connected to the ball screw, the ball screw is coaxially connected to the ball spline, and one end of the ball spline away from the ball screw is in mating contact with the groove of the contact block;
[0008] The automatic lifting mechanism has a lower limit unit for restricting the downward movement range of the processing table;
[0009] An upper limit unit is further provided between the fixed base and the processing table for restricting the upward movement range of the processing table.
[0010] As a further improvement of the present utility model, the contact between the ball spline and the contact block is a point contact.
[0011] As a further improvement of the present utility model, balls are fixed to the top of the ball spline, a V-shaped groove is formed at the bottom of the contact block, and the balls are in mating contact with the groove.
[0012] As a further improvement of the present utility model, a lower limit unit is provided at the top of the lifting drive unit. When the contact block contacts the lower limit unit, the processing table is in the lower limit position.
[0013] As a further improvement of the present utility model, the lifting drive unit further includes an encoder, and the encoder is electrically connected to the frameless motor.
[0014] As a further improvement of the present utility model, the automatic lifting mechanism further includes a connecting plate and a tension spring. The connecting plate is fixedly connected to the bottom of the processing table, one end of the tension spring is connected to the connecting plate, and the other end is connected to the fixed base;
[0015] At least two tension springs are provided and are symmetrically arranged on both sides of the lifting drive unit.
[0016] As a further improvement of the present utility model, the upper limit unit includes a limit cylinder, a limit rod and a contact member; the limit cylinder is installed on the fixed base, one end of the limit rod is connected to the processing table, and the other end is placed inside the limit cylinder; a contact member is provided on the limit rod located inside the limit cylinder. When the contact member contacts the top of the limit cylinder, the processing table is in the upper limit position.
[0017] As a further improvement of the present utility model, three groups of the automatic lifting mechanisms are symmetrically arranged, three groups of the upper limit units are symmetrically arranged, and the upper limit units are arranged between two adjacent automatic lifting mechanisms.
[0018] Generally speaking, compared with the prior art by the above technical solutions conceived by the present utility model, the following beneficial effects are achieved:
[0019] (1) For the processing platform capable of automatically lifting and leveling of the present utility model, through the independent control of at least three groups of automatic lifting mechanisms, the angle and height of the processing table can be adjusted, so as to adjust the flatness and height of the processing table. Through the lower limit unit and the upper limit unit, the up and down movement range of the processing table can be restricted, avoiding the collision and deformation with other mechanisms due to the processing table exceeding the stroke during the lifting process, which affects the movement.
[0020] (2) For the processing platform capable of automatically lifting and leveling of the present utility model, in the automatic lifting mechanism, the tension spring always provides a downward pulling force to the processing table to ensure its lifting stability; by providing a connecting plate, the pulling force of the tension spring acts on the connecting plate, which can avoid the problem that the direct connection between the tension spring and the processing table causes local stress on the processing table and results in elastic deformation.
[0021] (3) The processing platform of the present utility model that can automatically lift and level, the automatic lifting mechanism ensures the positioning accuracy through a semi-closed loop control method and a high-precision guiding and driving mechanism.
[0022] (4) The processing platform of the present utility model that can automatically lift and level, the ball spline and the contact block are in point contact, combined with the highly integrated design, making the structure compact and the overall center of gravity low, ensuring the stability and reliability of leveling to the maximum extent. Description of the Drawings
[0023] Figure 1 It is a schematic diagram of the external structure of the processing platform that can automatically lift and level according to an embodiment of the present utility model;
[0024] Figure 2 It is a schematic diagram of the internal structure of the processing platform that can automatically lift and level according to an embodiment of the present utility model;
[0025] Figure 3 It is a schematic diagram of the structure of the automatic lifting mechanism involved in the processing platform that can automatically lift and level according to an embodiment of the present utility model;
[0026] Figure 4 It is a schematic diagram of the structure of the lifting drive unit involved in the automatic lifting mechanism according to an embodiment of the present utility model;
[0027] Figure 5 It is a schematic diagram of the structure of the upper limit unit involved in the processing platform that can automatically lift and level according to an embodiment of the present utility model.
[0028] In all the drawings, the same reference numerals represent the same technical features, specifically: 1, fixed base; 2, processing table; 3, automatic lifting mechanism; 4, upper limit unit;
[0029] 31, contact block; 32, lower limit unit; 33, connecting plate; 34, tension spring; 35, lifting drive unit; 351, frameless motor; 352, ball screw; 353, ball spline; 354, ball; 355, encoder; 41, limit cylinder; 42, limit rod; 43, contact member. Detailed Embodiments
[0030] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model. In addition, the technical features involved in the various embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0031] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0032] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.
[0033] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.
[0034] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0035] As a preferred embodiment of the present utility model, as Figures 1 to 5As shown in the figure, the processing platform of the utility model that can be automatically lifted and leveled includes a fixed base 1 and a processing table 2. At least three groups of automatic lifting mechanisms 3 are provided between the fixed base 1 and the processing table 2. The processing table 2 is used to place the products to be processed. The automatic lifting mechanisms 3 drive the processing table to lift, so as to automatically adjust the flatness and height of the processing table 2. When each group of automatic lifting mechanisms 3 is adjusted separately, the processing table 2 can be leveled. When each group of automatic lifting mechanisms 3 is lifted and lowered synchronously, the height of the processing table 2 can be adjusted.
[0036] Preferably, the automatic lifting mechanism 3 has a lower limit unit for restricting the downward movement range of the processing table 2. Further preferably, an upper limit unit 4 is also provided between the fixed base 1 and the processing table 2 for restricting the upward movement range of the processing table 2.
[0037] More preferably, three groups of automatic lifting mechanisms 3 are symmetrically arranged, and at the same time, three groups of upper limit units 4 are symmetrically arranged, and the upper limit unit 4 is arranged between two adjacent automatic lifting mechanisms 3.
[0038] Specifically, as Figure 3 shown, the automatic lifting mechanism 3 includes a contact block 31, a lower limit unit 32, and a lifting drive unit 35. Among them, the contact block 31 is fixedly connected to the processing table 2 and moves synchronously with the processing table 2. The contact block 31 has a groove with an opening downward. Further combined with Figure 4 shown, the lifting drive unit 35 includes a frameless motor 351, a ball screw 352, and a ball spline 353; the frameless motor 351 is connected to the ball screw 352, the ball screw 352 is coaxially connected to the ball spline 353, and one end of the ball spline 353 away from the ball screw 352 is in mating contact with the groove of the contact block 31. By converting the rotational motion of the frameless motor 351 into the linear motion of the ball screw 352 and the ball spline 353, the processing table 2 is driven to lift and lower. More specifically, the frameless motor 351 includes a stator and a rotor. The rotor rotates around the stator, and the rotor is threadedly connected to the ball screw 352 through a connecting sleeve, so as to realize the synchronous lifting and lowering of the ball screw 352 and the ball spline 353 under the rotation of the frameless motor 351.
[0039] Furthermore, a lower limit unit 32 is fixedly provided at the top of the lifting drive unit 35. The lower limit unit 32 is sleeved outside the ball spline 353. When the ball spline 353 descends, the processing table 2 and the contact block 31 move downward. When the contact block 31 contacts the lower limit unit 32, the processing table 2 is in the lower limit position. The lower limit unit 32 is preferably made of soft material. The setting of the lower limit unit 32 can prevent the processing table from moving downward beyond the stroke and causing collision deformation of other mechanisms, affecting the movement.
[0040] Furthermore, the ball spline 353 and the contact block 31 are preferably in point contact to reduce the contact area between the two. When the contact area between the two is too large, the rise of the separate automatic lifting mechanism 4 may drive the entire processing table 2 to rise, thus affecting the leveling accuracy. The way of point contact is not limited herein. For example, in the embodiment of the present invention, a ball 354 is provided at one end of the ball spline 353 away from the ball screw 352, and the contact block 31 is a V-shaped block with an opening downward, that is, a V-shaped groove is provided at the bottom of the contact block, so that the ball screw 352 and the contact block 31 are in point contact.
[0041] Preferably, the lifting drive unit 35 further includes an encoder 355, and the encoder 355 is electrically connected to the frameless motor 351. The encoder 355 and the frameless motor 351 form a closed-loop circuit, which can accurately control the rotation angle of the motor and thus control the lifting height of the ball screw 352.
[0042] Further preferably, the automatic lifting mechanism 3 further includes a connecting plate 33 and a tension spring 34. The connecting plate 33 is fixedly connected to the bottom of the processing table 2 and moves synchronously with the processing table 2. The tension spring 34 is preferably provided with at least two and is symmetrically arranged on both sides of the lifting drive unit 35. One end of the tension spring 34 is connected to the connecting plate 33, and the other end is connected to the fixed base 1. By providing the tension spring 34, a downward pulling force is always provided to the processing table 2 to eliminate the contact gap between the contact block 31 and the ball spline 353 and ensure its lifting stability; by providing the connecting plate 33, the pulling force of the tension spring 34 acts on the connecting plate 33, which can avoid the problem that the processing table 2 is elastically deformed under the pulling force of the tension spring due to the direct connection between the tension spring 34 and the processing table 2.
[0043] As Figure 5 shown, the upper limit unit 4 includes a limit cylinder 41, a limit rod 42 and a contact member 43. The limit cylinder 41 is fixedly installed on the fixed base 1. One end of the limit rod 42 is connected to the processing table 2, and the other end is placed in the limit cylinder 41. A contact member 43 is provided on the limit rod 42 located in the limit cylinder 41. The contact member 43 is preferably made of a soft material. During the upward movement of the processing table 2, the limit rod 42 moves upward relative to the limit cylinder 41. When the contact member 43 contacts the top of the limit cylinder 41, the processing table 2 is in the upper limit position. At this time, the limit rod will no longer move upward, thus playing a limiting role to prevent the processing table 2 from moving upward beyond the stroke and colliding with other mechanisms and deforming, affecting the movement.
[0044] It can be understood that the length of the limit rod 42 in the limit cylinder 41 needs to satisfy: when the processing table 2 is in the lower limit position, the limit rod 42 just contacts the bottom of the limit cylinder 41 or there is still a certain distance between the limit rod 42 and the bottom of the limit cylinder 41.
[0045] In addition, in the preferred embodiment, as Figure 1 and2 As shown, a housing for protection is provided outside the automatic lifting mechanism 3 and the upper limit unit 4, and the housing is fixed to the fixed base 1; the shape of the housing is not limited, and the cross-sectional shape of the housing only needs to match the shape of the processing table 2. For example, in the specific embodiment shown in the drawings, the housing is annular and the processing table 2 is circular.
[0046] For the processing platform capable of automatic lifting and leveling of the present utility model, when the flatness of the processing table 2 needs to be adjusted, the angle is adjusted by separately controlling the three groups of automatic lifting mechanisms 3, thereby leveling the processing table 2; when the height of the processing table 2 needs to be adjusted in the Z-axis direction, the three groups of automatic lifting mechanisms 4 are controlled to lift and lower simultaneously.
[0047] It is easy for those skilled in the art to understand that the above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. An automatically liftable and leveling processing platform, characterized in that, It includes a fixed base and a processing tabletop; At least three sets of automatic lifting mechanisms are provided between the fixed base and the processing tabletop, which are used to drive the lifting of the processing tabletop, so as to automatically adjust the flatness and height of the processing tabletop; The automatic lifting mechanism includes a contact block and a lifting drive unit; the contact block is fixedly connected to the processing tabletop, and the contact block has a groove with an opening downward; The lifting drive unit includes a frameless motor, a ball screw and a ball spline; the frameless motor is connected to the ball screw, the ball screw is coaxially connected to the ball spline, and one end of the ball spline away from the ball screw is in mating contact with the groove of the contact block; The automatic lifting mechanism has a lower limit unit for restricting the downward movement range of the processing tabletop; An upper limit unit is also provided between the fixed base and the processing tabletop for restricting the upward movement range of the processing tabletop.
2. The processing platform capable of automatically lifting and leveling according to claim 1, wherein, The ball spline and the contact block are in point contact.
3. The processing platform capable of automatically lifting and leveling according to claim 1, wherein A ball is fixed on the top of the ball spline, and a V-shaped groove is formed at the bottom of the contact block, and the ball and the groove are in mating contact.
4. The processing platform capable of automatically lifting and leveling according to claim 1, wherein A lower limit unit is provided at the top of the lifting drive unit. When the contact block contacts the lower limit unit, the processing tabletop is at the lower limit position.
5. The processing platform capable of automatically lifting and leveling according to claim 1, characterized in that, The lifting drive unit further includes an encoder, and the encoder is electrically connected to the frameless motor.
6. The processing platform capable of automatically lifting and leveling according to any one of claims 1-5, characterized in that, The automatic lifting mechanism further includes a connecting plate and a tension spring. The connecting plate is fixedly connected to the bottom of the processing tabletop. One end of the tension spring is connected to the connecting plate, and the other end is connected to the fixed base; At least two tension springs are provided and are symmetrically arranged on both sides of the lifting drive unit.
7. The processing platform capable of automatically lifting and leveling according to any one of claims 1-5, characterized in that, The upper limit unit includes a limit cylinder, a limit rod and a contact member; the limit cylinder is installed on the fixed base, one end of the limit rod is connected to the processing tabletop, and the other end is placed in the limit cylinder; a contact member is provided on the limit rod located in the limit cylinder. When the contact member contacts the top of the limit cylinder, the processing tabletop is at the upper limit position.
8. The processing platform capable of automatically lifting and leveling according to any one of claims 1-5, characterized in that, Three sets of the automatic lifting mechanisms are symmetrically arranged, and three sets of the upper limit units are symmetrically arranged, and the upper limit units are arranged between two adjacent automatic lifting mechanisms.