Large-stroke side-hung motion platform

Abstract

The utility model discloses a large-stroke side-hung motion platform which is fixed on a vertical structure and comprises a motion platform base, one side face of the motion platform base is fixed on the vertical structure, a ball screw is fixed on the other side face of the motion platform base through a bearing, and a center shaft of the ball screw is perpendicular to the ground. The top end of the ball screw is in transmission connection with an output shaft of a servo motor, a rod body of the ball screw is rotationally connected with two bearing seat assemblies, the bearing seat assemblies are fixedly connected with the motion table base, and the ball screw is located between the two bearing seat assemblies and sleeved with a ball sliding block in a matched and penetrating mode. The large-stroke side-hung movement table comprises a movement table base, a ball sliding block and a sliding table plate, the sliding table plate does not move relative to the movement table base in the horizontal direction under the constraint of external force, and the side, facing the movement table base, of the sliding table plate is fixedly connected with the ball sliding block. The method can be applied to various scenes requiring large-stroke and large-load precision machining, precision detection and the like.

Description

Technical Field

[0001] The utility model relates to the field of numerical control worktables, and more specifically, to a side-mounted motion table with a large stroke. Background Art

[0002] In the technical fields of communications, semiconductors, biomedicine, etc., the positioning accuracy requirements for testing and scanning of workpieces and specimens are becoming increasingly higher. Vertical motion is required in many cases, and the methods of providing vertical motion generally adopt lifting, side-hanging lifting and hanging.

[0003] The side-mounted lifting form has obvious advantages in the case of large stroke, large load and high precision requirements. The cylinder group is often used to lift the slide to balance the load weight. For example, the patent application publication number CN214583337U discloses a side-mounted vertical motion air-floating linear table, which uses two cylinders to cooperate with the error compensation adjustment mechanism to compensate for the dimensional error, thereby improving the running stability and running accuracy of the linear table. However, since the scheme adopts a cylinder structure, the linear table can only have two stop points, high and low, within its travel range without adding additional structures. The cylinder stroke needs to be adjusted in different application scenarios, and since the scheme adopts a dual-cylinder joint support mode, When the motion platform works for a long time, the cylinders on both sides may not work in coordination due to load deviation, installation error, or internal leakage between the piston and the cylinder under long-term operation. In addition, the minimum stroke of the slide in this solution is directly affected by the cylinders on both sides. When the slide needs to be lifted upward from a height near the ground, the bottom of the base must be installed or close to the ground. However, in some spatial layouts or working conditions, there is no space within the height range near the ground to accommodate the base structure. Therefore, a large-stroke side-mounted motion platform is needed, in which the base is mounted at a high place, the minimum stroke of the slide needs to be close to the ground, and the slide can be lifted stably for a long time. Utility Model Content

[0004] One purpose of the utility model is to provide a large-stroke side-mounted motion table that can be installed on a vertical structure and can be suitable for different application environments. When there is no base installation space near the ground, the lowest stroke of the slide can reach the ground, and the slide structure can accurately control the vertical movement of materials for a long time.

[0005] In order to achieve these purposes and other advantages of the utility model, according to one aspect of the utility model, a large-stroke side-mounted motion platform is provided, which is fixed on a vertical structure and includes:

[0006] The moving table base has one side fixed to a vertical structure. On the other side of the moving table base, a ball screw is fixed by bearings. The central axis of the ball screw is perpendicular to the ground. The top end of the ball screw is drivingly connected to the output shaft of a servo motor. The rod body of the ball screw is rotatably connected to two bearing seat assemblies, and the bearing seat assemblies are fixedly connected to the moving table base. A ball slide block is sleeved on the ball screw between the two bearing seat assemblies in a matching manner; a slide plate, which has no relative displacement with the moving table base in the horizontal direction under external force constraints, and the side of the slide plate facing the moving table base is fixedly connected to the ball slide block.

[0007] Preferably, on the side of the slide plate facing the moving table base and on both sides of the ball slide block in the vertical direction, a linear guide rail is fixed respectively. On both sides of the ball screw on the moving table base, sliders are installed and fixed. The linear track is sleeved in the corresponding slider in a matching manner. Among them, when the servo motor drives the ball screw to rotate along the axis, the linear guide rail of the slide plate is horizontally constrained by the slider, and the ball slide block is vertically displaced under the action of the ball screw sleeved thereon and the constraint of the slide plate.

[0008] Preferably, the cross-section of the moving table base is concave-shaped. The flat vertical surface of the moving table base is fixed to a vertical structure. The sliders are fixed on the vertical surfaces of the two convex parts of the moving table base, and the ball screw is located between the two convex parts of the moving table base.

[0009] Preferably, at least two sliders are fixed on each convex part of the moving table base.

[0010] Preferably, a grating scale is installed on the side of the moving table facing the moving table base, and a grating scale reading head is installed at the position corresponding to the grating scale on the side of the moving table base opposite to the slide plate. Among them, the grating scale reading head reads the change of the engraved lines on the grating scale to monitor the moving position of the slide plate.

[0011] Preferably, a junction box is provided on the upper part of the moving table base, and the cables of the servo motor and the grating scale reading head are arranged in the junction box.

[0012] The utility model has at least the following beneficial effects:

[0013] First, for the large-stroke side-hung moving table provided by the utility model, a ball screw electric module is adopted to complete the lifting and lowering of the moving table, avoiding the problem of incoordination that is likely to occur when multiple cylinders work together in a conventional structure;

[0014] Second, for the large-stroke side-hung moving table provided by the utility model, the adopted ball screw electric module can make the slide plate stay at any height within the stroke range, be applicable to various scenarios, and effectively ensure the accuracy of lifting or lowering.

[0015] Thirdly, the base of the moving table of this solution is fixed on a vertical structure such as a wall or a frame, in a relatively suspended state. The sliding table board is loaded after descending from the height of the moving table base and then lifted, without any components occupying the space below additionally.

[0016] Other advantages, objectives and features of the present utility model will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present utility model. Description of the Drawings

[0017] The following further detailed description of the present utility model is made in conjunction with the drawings and embodiments:

[0018] Figure 1 It is the front elevation view of the present utility model;

[0019] Figure 2 It is the rear elevation view of the present utility model;

[0020] Figure 3 It is the side elevation view of the present utility model;

[0021] Figure 4 It is the top view of the present utility model;

[0022] Figure 5 It is the overall schematic diagram of the present utility model;

[0023] Figure 6 It is the schematic diagram of the base of the moving table of the present utility model;

[0024] Figure 7 It is the schematic diagram of the back of the sliding table board of the present utility model.

[0025] Legend: 1 - base of the moving table, 2 - sliding table board, 21 - ball slider, 3 - ball screw, 4 - bearing block assembly, 5 - coupling, 6 - motor mounting base, 7 - servo motor, 8 - junction box, 9 - linear guide rail, 10 - slider, 11 - grating scale reading head, 12 - grating scale. Detailed Embodiment

[0026] The following further detailed description of the present utility model is made in conjunction with the drawings, so that those skilled in the art can implement it with reference to the text of the specification.

[0027] It should be understood that the terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or more other elements or their combinations.

[0028] It should be noted that, unless otherwise specified, the experimental methods described in the following implementation schemes are all conventional methods, and the components, unless otherwise specified, can be obtained from commercial channels; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "setting" should be understood in a broad sense. For example, they can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The orientation or positional relationship indicated by the terms "horizontal", "vertical", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0029] As Figures 1 to 7 shown, the technical solution of the present application provides a large-stroke side-hung moving table, which is fixedly located on a vertical structure and includes:

[0030] A moving table base 1, one side of which is fixed to the upright structure. A ball screw 3 is fixedly mounted on the other side of the moving table base 1 by bearings. The central axis of the ball screw 3 is perpendicular to the ground. The top end of the ball screw 3 is drivingly connected to the output shaft of a servo motor 7. Two bearing seat assemblies 4 are rotatably connected to the rod body of the ball screw 3. The bearing seat assemblies 4 are fixedly connected to the moving table base 1. A ball slide block 21 is fitted and sleeved between the two bearing seat assemblies 4 on the ball screw 3; A slide table plate 2, which has no relative displacement with the moving table base 1 in the horizontal direction under external force constraints. The side of the slide table plate 2 facing the moving table base 1 is fixedly connected to the ball slide block 21. In this technical solution, the vertical structure can be a wall structure or a bracket-like structure. The moving table base 1 is fixed to the vertical structure in the form of bolts or hangers. The servo motor 7 is fixed above the side of the moving table base 1 through a motor mounting seat 6. The output shaft of the servo motor 7 is vertically downward and drivingly connected to the ball screw 3.

[0031] In this technical solution, the top end of the ball screw 3 and the output shaft of the servo motor 7 are connected by a coupling 5. The coupling 5 connects the top end of the ball screw 3 and the output shaft of the servo motor 7, allowing them to rotate together and transmit torque. The coupling 5 can also compensate for the relative displacement between the two shafts, helping to reduce the stress caused by installation errors or deformation during operation. Optionally, the coupling 5 also has an overload protection function. When the system bears an excessive load, the coupling 5 will disconnect, thereby protecting other components from damage.

[0032] In this technical solution, the ball screw 3 is fitted through the bearing seat assembly 4 and the ball slider 21. Among them, the ball screw 3, the bearing seat assembly 4, and the ball slider 21 are all parts or devices that are easily available in the market. The ball slider 21 is internally provided with balls that can roll in a circulating manner along the thread of the ball screw 3. When the displacement of the ball slider 21 in the water level direction is restricted, the vertical ball screw 3 rotates, and the ball slider 21 can move vertically up and down correspondingly according to the rotation direction of the ball screw 3 and drive the slide plate 2. The bearing seat assembly 4 is connected to the moving table base 1 by means of bolts or welding. The inner ring of the bearing structure in the bearing seat assembly 4 is fixed to the ball screw 3 and rotates therewith, while the outer ring of the bearing structure is fixed to the moving table base 1 and supports the loads of the ball screw 3, the ball slider 21, and the slide plate 2. Optionally, the bearing seat assembly 4 is installed at the uppermost and lowermost parts of the ball screw 3, so that the ball slider 21 obtains the maximum vertical displacement stroke.

[0033] In this technical solution, the displacement of the slide plate 2 in the horizontal direction can be restricted by means of an external frame or guide rail. Optionally, two parallel linear guide rails are vertically fixed on the side of the slide plate 2 facing the moving table base 1 by screws, and correspondingly, sliders that match the shape of the linear guide rails and are nested are fixed on the moving table base 1 by screws, and the high-precision movement of the slide plate 2 is realized through the supporting and guiding functions of the guide rail and the slider cooperating with each other.

[0034] In this technical solution, the ball slider 21 and the slide plate 2 are connected to the side facing the moving table base 1 by means of bolts or welding. When the ball screw 3 rotates driven by the servo motor 7, the ball slider 21 and its fixed slide plate 2 are restricted by the external structure in the horizontal direction and can only move vertically without rotation. A frame can be installed on the side of the slide plate 2 away from the moving table base 1 to more conveniently place materials. The moving table base 1 in this solution is suspended at a higher position, and the slide plate 2 is lifted to a higher position by the ball slider 21 so that no component of the whole device occupies the space below. And this solution realizes that the slide plate 2 can be lifted or lowered to any position within the stroke range by the structural form of the ball screw 3 cooperating with the ball slider 21, and is applicable to a wider range of application scenarios.

[0035] In another technical solution, on one side of the slide table plate 2 facing the moving table base 1, two linear guide rails 9 are vertically fixed on both sides of the bearing block assembly 4. On both sides of the ball screw 3, the moving table base 1 is installed and fixed with sliders 10. The linear rail 9 is fitted and sleeved in the corresponding slider 10. Among them, the slider 10 is installed on the moving table base 1 by bolts or welding. When the servo motor 7 drives the ball screw 3 to rotate along the axis, the linear guide rail 9 of the slide table plate 2 is horizontally constrained by the slider 10. The ball slider 21 is vertically displaced under the action of the ball screw 3 sleeved thereon to drive the slide table plate 2 to vertically displace. In this technical solution, the linear guide rail 9 is arranged throughout the height of the slide table plate 2. The linear guide rail 9 matches the slider 10 and can only vertically displace along the slider 10. The slider 10 provides a horizontal constraint for the linear guide rail 9 and the slide table plate 2.

[0036] In another technical solution, the cross-section of the moving table base 1 is concave-shaped. The plane of the moving table base 1 is fixed to the vertical structure. The sliders 10 are fixed on the two protruding vertical surfaces of the moving table base 1. The ball screw 3 is located between the two protruding parts of the moving table base 1. The ball slider 21 can vertically displace along the ball screw 3 between the protruding parts of the moving table base 1. The slide table plate 2 is in close contact with the protruding parts of the moving table base 1. The linear rail 9 can be nested in the slider 10 without being fixed to the slide table plate 2 through redundant support structures.

[0037] In another technical solution, at least two sliders 10 are fixed on each protruding part of the moving table base 1. The same linear guide rail 9 is nested on several sliders 10 to obtain a better horizontal constraint effect.

[0038] In another technical solution, a grating scale 12 is installed on the side of the slide table plate 2 facing the moving table base 1. At the position corresponding to the grating scale 12 on the side of the moving table base 1 opposite to the slide table plate 2, a grating scale reading head 11 is installed. Among them, the grating scale reading head 11 reads the change of the engraved lines on the grating scale 12 to monitor the moving position of the slide table plate 2. The grating scale reading head 11 is fixed in the concave part of the moving table base 1 by bolts or by setting support members. The grating scale 12 is installed on the slide table plate 2 at a position matching the grating scale reading head 11. After the slide table plate 2 and the moving table base 1 have a relative vertical displacement, the grating scale reading head 11 can accurately collect the relative displacement amount between the slide table plate 2 and the moving table base 1. In this technical solution, measurement is carried out using the optical principle, which has the characteristics of high precision, can reach the resolution level of sub-microns, can maintain high precision even in long-distance measurement, and has excellent stability and strong anti-interference ability, and can maintain stable monitoring performance in a complex working environment.

[0039] In another technical solution, a junction box 8 is provided on the upper part of the moving table base. The cables of the servo motor 7 and the grating scale reading head 11 are both arranged in the junction box 8. The power supply cables and communication cables of the servo motor 7 and other devices are arranged in the junction box 8 to avoid the cables dragging on the ground and to prevent the cable system from interfering with the movement of the slide plate 2.

[0040] The number of components and the processing scale described here are used to simplify the description of the present invention. The applications, modifications, and variations of the present invention will be obvious to those skilled in the art.

[0041] Although the embodiments of the present invention have been disclosed as above, it is not limited to the applications listed in the specification and the embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples described herein.

Claims

1. A long-travel side-mounted motion platform, which is fixed on a vertical structure and is characterized in that: include: A sports platform base, one side of which is fixed to the vertical structure, and a ball screw is fixed to a bearing on the other side of the sports platform base, the central axis of the ball screw is perpendicular to the ground, the top end of the ball screw is transmission-connected to the output shaft of a servo motor, the shaft of the ball screw is rotationally connected to two bearing seat assemblies, the bearing seat assemblies are fixed to the sports platform base, and the ball screw is located between the two bearing seat assemblies and is matched with a ball slider; The slide plate has no relative displacement with the moving platform base in the horizontal direction under the constraint of external force, and the slide plate is fixedly connected to the ball slider on the side facing the moving platform base.

2. The long-travel side-mounted motion platform according to claim 1, characterized in that: One side of the slide plate facing the moving table base is located at both sides of the ball slider, and a linear guide is fixed vertically thereon. The moving table base is located at both sides of the ball screw and sliders are installed and fixed thereon. The linear guides are matched and sleeved in the corresponding sliders. When the servo motor drives the ball screw to rotate along the axis, the linear guide of the slide plate is constrained by the slider, and the ball slider is vertically displaced by the action of the ball screw mounted thereon and the constraint of the slide plate.

3. The long-travel side-mounted sports platform according to claim 2, characterized in that: The cross section of the sports platform base is concave-shaped, the flat surface of the sports platform base is fixed to the vertical structure, the slider is fixed to the two raised surface of the sports platform base, and the ball screw is located between the two raised parts of the sports platform base.

4. The long-travel side-mounted sports platform according to claim 3, characterized in that: At least two sliding blocks are fixed on each protruding portion of the sports platform base.

5. The long-travel side-mounted sports platform according to claim 1, characterized in that: A grating scale is installed on one side of the moving table facing the moving table base, and a grating scale reading head is installed at a position corresponding to the grating scale on a side of the moving table base opposite to the slide plate, wherein the grating scale reading head reads the changes in the engraved lines on the grating scale to monitor the moving position of the slide plate.

6. The long-travel side-mounted sports platform according to claim 1, characterized in that: A junction box is provided on the upper part of the motion platform base, and cables of the servo motor and the grating ruler reading head are all installed in the junction box.

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