Gantry machining center with exchangeable workbenches

Abstract

The utility model discloses a gantry machining center with exchangeable workbenches, which belongs to the technical field of numerical control machining equipment, and comprises a base with a plurality of first positioning parts, and the first positioning parts are connected with first driving components for driving the first positioning parts to move between a first height and a second height; a plurality of second driving assemblies capable of driving the supporting guide rail to move between a third height and a fourth height are arranged between the supporting guide rail and the base; the supporting guide rail is provided with a first locking surface; a second positioning part matched with the first positioning part and a containing cavity matched with the supporting guide rail are arranged on the bottom surface of the table board; a second locking surface is arranged on the accommodating cavity; the table top moves along the supporting guide rail to achieve interchange, when the table top moves to the working position, positioning can be achieved through the first positioning part and the second positioning part, after positioning, the second driving assembly drives the supporting guide rail to move downwards, the first locking face and the second locking face are tightly attached, the table top can be locked, the locking stroke is reduced, and the working efficiency is improved. And stable movement and interchange of the table board are realized.

Description

Technical Field

[0001] This utility model relates to the field of CNC machining equipment technology, specifically to a gantry machining center with an interchangeable worktable. Background Technology

[0002] Currently, gantry exchange worktables mainly consist of a tabletop moving part, a tabletop locking part, and a tabletop positioning part. The tabletop locking part is usually locked by a locking cylinder, and the tabletop positioning part is usually positioned by a positioning cone. Due to the height limitation of the positioning cone, the stroke of the locking cylinder is relatively large, which can easily lead to the problem of multiple cylinders being out of sync, potentially causing the tabletop to tip over and making it impossible to guarantee the stability and safety of the tabletop during movement and exchange.

[0003] Therefore, developing a gantry machining center with an interchangeable worktable that can reduce locking stroke, improve stability and safety during table movement and interchange, and is cost-effective is an urgent problem to be solved at present. Summary of the Invention

[0004] To address the problems existing in the prior art, this utility model provides a gantry machining center with an interchangeable worktable. The worktable can be moved relative to the base along the support guide rail to achieve interchangeability. When the worktable moves to the working position, it can be positioned by the matching first and second positioning parts. After the worktable is positioned, the second drive component drives the support guide rail to move vertically downward, so that the matching first and second locking surfaces fit tightly together, locking the worktable. This greatly reduces the locking stroke, solves the problem of worktable tipping caused by asynchronous movement, achieves smooth movement and interchangeability of the worktable, and ensures the exchange accuracy of the worktable.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a gantry machining center with an interchangeable worktable, comprising:

[0007] A base is provided with a plurality of first positioning parts, each first positioning part being connected to a first driving component, the first driving component being able to drive the first positioning part to move between a first height and a second height.

[0008] Several supporting guide rails are located above the base. Several second driving components are provided between the supporting guide rails and the base. The second driving components can drive the supporting guide rails to move between a third height and a fourth height. The supporting guide rails have a first locking surface facing downwards.

[0009] A table top, a bottom surface of the table top is provided with a second positioning part matched with the first positioning part and a receiving cavity matched with the support rail; when the first positioning part is located at the first height, the first positioning part is separated from the second positioning part; when the first positioning part is located at the second height, the first positioning part is matched with the second positioning part to position the table top; the support rail is embedded in the receiving cavity, and the table top can move along the support rail; the receiving cavity is provided with a second locking surface matched with the first locking surface; when the support rail is located at the third height, the first locking surface and the second locking surface have a gap therebetween; when the support rail is located at the fourth height, the first locking surface is tightly attached to the second locking surface.

[0010] As a preferred technical solution, the support rail extends along a first horizontal direction, a cross section of the support rail is T-shaped, and a lower surface of a horizontal section of the support rail forms the first locking surface.

[0011] As a preferred technical solution, a plurality of rolling bearings are mounted on the upper surface and the side wall of the support rail, and an outer ring circumferential surface of the rolling bearing is in abutment with an inner wall surface of the receiving cavity.

[0012] As a preferred technical solution, the bottom surface of the table top is provided with a receiving groove, a closed-in insert strip is arranged at a groove opening of the receiving groove, the receiving groove and the closed-in insert strip form the receiving cavity, and an upper surface of the closed-in insert strip forms the second locking surface.

[0013] As a preferred technical solution, the second driving assembly is a locking oil cylinder, a piston rod of the locking oil cylinder is fixedly connected with the support rail.

[0014] And / or, a height difference between the third height and the fourth height is 3-5 mm.

[0015] As a preferred technical solution, the support rail is provided as two, the first positioning part is provided as two, and the two first positioning parts are located between the two support rails and are distributed along the first horizontal direction.

[0016] As a preferred technical solution, the first driving assembly is a positioning oil cylinder, an upper end of a piston rod of the positioning oil cylinder forms the first positioning part; the bottom surface of the table top is provided with a positioning sleeve, the positioning sleeve is provided with a positioning hole matched with the piston rod of the positioning oil cylinder, and the positioning hole forms the second positioning part.

[0017] As a preferred technical solution, the positioning oil cylinder is a double-rod oil cylinder, and the bottom of the positioning oil cylinder is provided with an inductive switch for measuring a position of a piston rod of the double-rod oil cylinder.

[0018] As a preferred technical solution, the table top is connected with a third driving assembly for driving the movement of the table top.

[0019] As a preferred technical solution, the third driving assembly is provided as a chain lifting structure.

[0020] The beneficial effects of the utility model are shown in:

[0021] 1. The table top of the utility model can be moved along the support guide rail relative to the base to realize exchange, when the table top is moved to the working position, the first positioning part and the second positioning part can cooperate to position the table top, after the table top is positioned, the second driving assembly drives the support guide rail to move vertically downward, the first locking surface and the second locking surface are closely attached to lock the table top, which greatly reduces the locking stroke, avoids the problem of overturning of the table top caused by asynchronous locking, realizes stable movement and exchange of the table top, and can ensure the exchange accuracy of the table top.

[0022] 2. The utility model utilizes a plurality of rolling bearings on the upper surface and the side wall of the support guide rail, when the table top moves relative to the base, the outer periphery of the outer ring of the rolling bearing abuts against the inner wall surface of the accommodating cavity, and the table top and the support guide rail are in rolling friction, which reduces the friction while supporting and guiding the stable movement of the table top. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a sectional view along the first horizontal direction of an embodiment of the utility model of a workbench exchangeable gantry machining center;

[0024] Figure 2 is a structural schematic view of the first positioning part and the first driving assembly in Figure 1

[0025] Figure 3 is a sectional view along the second horizontal direction of the utility model;

[0026] Figure 4 is a structural schematic view of the support guide rail and the second driving assembly in Figure 3

[0027] Figure 5 Figure 3 is a structural schematic view of the rolling bearing located at the upper surface of the support guide rail in

[0028] Figure 6 Figure 3 is a structural schematic view of the rolling bearing located at the side of the support guide rail in

[0029] Figure 7 is a structural schematic view when the table top is not moved to the working position.

[0030] ​​​​In the figure: 1-base, 11-first positioning part, 12-first driving assembly, 13-induction switch, 14-third driving assembly, 2-supporting guide rail, 21-second driving assembly, 22-first locking surface, 23-rolling bearing, 3-table top, 31-second positioning part, 32-containing cavity, 33-second locking surface, 34-containing slot, 35-closed type inlay strip. DETAILED DESCRIPTION

[0031] For the convenience of those skilled in the art to understand, the utility model is further explained below in combination with the drawings.

[0032] Please refer to Figures 1-7 , one embodiment of the utility model provides a workbench exchangeable gantry machining center, including base 1, a plurality of supporting guide rails 2 are located above base 1, the bottom surface of table top 3 is equipped with the containing cavity 32 matched with supporting guide rail 2, and supporting guide rail 2 is embedded in containing cavity 32, and table top 3 can move along supporting guide rail 2, facilitating the interchange of table top 3;

[0033] Base 1 is equipped with a plurality of first positioning parts 11, the first positioning part 11 is connected with the first driving assembly 12, the first driving assembly 12 can drive the first positioning part 11 to move between the first height and the second height, and the first height is lower than the second height;The bottom surface of table top 3 is equipped with the second positioning part 31 matched with the first positioning part 11;When the first positioning part 11 is located at the first height, the first positioning part 11 is separated from the second positioning part 31, and table top 3 can move relative to base 1;When table top 3 moves to the working position and the first positioning part 11 is located at the second height, the first positioning part 11 cooperates with the second positioning part 31 to position the position of table top 3;The matched first positioning part 11 and second positioning part 31 can ensure the repeat positioning accuracy of table top 3;

[0034] A plurality of second driving assemblies 21 are arranged between supporting guide rail 2 and base 1, the second driving assembly 21 can drive supporting guide rail 2 to move between the third height and the fourth height, and the third height is higher than the fourth height;Supporting guide rail 2 has the first locking surface 22 facing downward;Containing cavity 32 has the second locking surface 33 matched with the first locking surface 22;When supporting guide rail 2 is located at the third height, the first locking surface 22 and the second locking surface 33 have a spacing, and table top 3 can move smoothly relative to base 1;When table top 3 moves to the working position and supporting guide rail 2 is located at the fourth height, the first locking surface 22 and the second locking surface 33 are closely attached, and table top 3 can be locked and fixed.

[0035] In the embodiment, please refer to Figure 1 And Figure 2, the first driving assembly 12 is provided as a positioning oil cylinder, the upper end of the piston rod of the positioning oil cylinder forms the first positioning part 11; the bottom surface of the table top 3 is provided with a positioning sleeve, the positioning sleeve is provided with a positioning hole matched with the piston rod of the positioning oil cylinder, the positioning hole forms the second positioning part 31, when the piston rod of the positioning oil cylinder is inserted into the positioning hole, the table top 3 can be positioned; in other embodiments, the first driving assembly 12 can also be a gas cylinder or an electric cylinder, and the first positioning part 11 can also be provided as a positioning cone, so as to stably position the table top 3.

[0036] Further, please refer to Figure 3 , the positioning oil cylinder is preferably provided as a double-rod oil cylinder, the bottom of the positioning oil cylinder is provided with an inductive switch 13 for measuring the position of the piston rod of the double-rod oil cylinder, and whether the piston rod of the positioning oil cylinder is in place can be determined through the inductive switch 13.

[0037] In the embodiment, please refer to Figures 3-6 , the support rail 2 extends along the first horizontal direction, the cross section of the support rail 2 is T-shaped, the shape of the accommodating cavity 32 is matched with the T-shaped cross section, and the support rail 2 can stably support and guide the movement of the table top 3; the lower surface of the horizontal section of the support rail 2 can form the first locking surface 22.

[0038] Further, please refer to Figure 3 , the bottom surface of the table top 3 is provided with an accommodating groove 34, the accommodating groove 34 is provided with a closed strip 35 at the groove opening, the accommodating groove 34 and the closed strip 35 form the accommodating cavity 32, and the upper surface of the closed strip 35 forms the second locking surface 33 at the portion located directly below the first locking surface 22; in other embodiments, the accommodating cavity 32 can also be an integral molding structure, and the inner wall surface of the accommodating cavity 32 is provided with the second locking surface 33 located directly below the first locking surface 22, so that the locking and unlocking of the table top 3 can be realized.

[0039] Specifically, please refer to Figure 4 , the second driving assembly 21 is provided as a locking oil cylinder, and the piston rod of the locking oil cylinder is fixedly connected with the support rail 2 through a screw; in other embodiments, the second driving assembly 21 can also be provided as a gas cylinder or an electric cylinder, so as to stably drive the support rail 2 to move in the vertical direction.

[0040] It should be noted that in actual use, the height difference between the third height and the fourth height is only 3-5 mm, the locking stroke is small, and the problem that the table top 3 is overturned due to the different steps of multiple locking oil cylinders will not occur.

[0041] In the embodiment, please refer to Figure 5 and Figure 6The upper surface and the side wall of the support guide rail 2 are provided with a plurality of rolling bearings 23, the outer ring circumferential surface of the rolling bearing 23 is in abutment with the inner wall surface of the accommodating cavity 32, the rolling bearing 23 can support and guide the stable movement of the table top 3 while reducing the friction; specifically, the support guide rail 2 is provided with a placing chamber at the position corresponding to the rolling bearing 23, the inner ring of the rolling bearing 23 is fixed in the placing chamber through a pin shaft, and the outer ring of the rolling bearing 23 protrudes from the surface of the support guide rail 2.

[0042] Further, please refer to Figure 1 , Figure 3 and Figure 7 , the support guide rail 2 is provided with two support guide rails, the first positioning part 11 is provided with two first positioning parts, and the two first positioning parts 11 are located between the two support guide rails 2 and are distributed along the first horizontal direction, that is, the positioning and locking of the table top 3 can be realized; specifically, the rolling bearings 23 on the side wall of the support guide rail 2 are preferably located on the side walls of the two support guide rails 2 arranged opposite to each other, which can ensure the stable movement of the table top 3; in other embodiments, the number of support guide rails 2 and the number of first positioning parts 11 can also be other values, and the distribution mode of the plurality of first positioning parts 11 can also be other forms, so as to stably position and lock the table top 3.

[0043] In this embodiment, please refer to Figure 7 , the table top 3 is connected with a third driving assembly 14 for driving the movement of the table top 3, the third driving assembly 14 is provided with a chain lifting structure, and the chain lifting structure can drive the table top 3 to stably move and realize the exchange; in other embodiments, the third driving assembly 14 can also be provided with a lead screw stepper motor or an oil cylinder, so as to stably drive the movement of the table top 3.

[0044] Please refer to Figures 1-7 , the specific working mode of the utility model is as follows:

[0045] When the table top 3 is moved to the working position under the driving of the third driving assembly 14, the piston rod of the positioning oil cylinder is stretched upward to the second height and is inserted into the positioning hole of the positioning sleeve, and the inductive switch 13 determines that the piston rod of the positioning oil cylinder is stretched to the position, so that the positioning of the table top 3 can be realized;

[0046] The piston rod of the locking oil cylinder is moved downward to the fourth height, so that the first locking surface 22 is tightly combined with the second locking surface 33, and the table top 3 can be locked and fixed.

[0047] When the table top 3 needs to be moved and exchanged, the piston rod of the positioning oil cylinder is retracted to the first height, the inductive switch 13 determines that the piston rod of the positioning oil cylinder is retracted to the position, the piston rod of the locking oil cylinder is lifted to the third height, the first locking surface 22 is separated from the second locking surface 33, and the table top 3 can be exchanged under the driving of the third driving assembly 14.

[0048] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and various changes and modifications can be made by those skilled in the art; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A gantry machining center with exchangeable tables, characterized in that, The utility model relates to a height-adjustable table, including: The base (1) is equipped with a plurality of first positioning part (11), first positioning part (11) is connected with first drive assembly (12), first drive assembly (12) can drive first positioning part (11) moves between first height and second height; A plurality of support guide rail (2), support guide rail (2) is located above the base (1), be equipped with a plurality of second drive assembly (21) between support guide rail (2) and the base (1), second drive assembly (21) can drive support guide rail (2) moves between third height and fourth height;Support guide rail (2) has the first locking surface (22) facing downwards on it; The bottom surface of the table top (3) is provided with a second positioning part (31) matched with the first positioning part (11) and a receiving cavity (32) matched with the support guide rail (2). When the first positioning part (11) is located at the first height, the first positioning part (11) is separated from the second positioning part (31). When the first positioning part (11) is located at the second height, the first positioning part (11) cooperates with the second positioning part (31) to position the table top (3). The support guide rail (2) is embedded in the receiving cavity (32), and the table top (3) can move along the support guide rail (2). The receiving cavity (32) has a second locking surface (33) matched with the first locking surface (22). When the support guide rail (2) is located at the third height, there is a gap between the first locking surface (22) and the second locking surface (33). When the support guide rail (2) is located at the fourth height, the first locking surface (22) and the second locking surface (33) are tightly attached.

2. A gantry machining center with exchangeable tables according to claim 1, characterized in that, The support guide rail (2) extends along a first horizontal direction, the cross section of the support guide rail (2) is T-shaped, and the lower surface of the horizontal section of the support guide rail (2) forms the first locking surface (22).

3. A gantry machining center with exchangeable tables according to claim 1 or 2, characterized in that A plurality of rolling bearings (23) are installed on the upper surface and the side wall of the support guide rail (2), and the outer ring circumferential surface of the rolling bearing (23) abuts against the inner wall surface of the receiving cavity (32).

4. A gantry machining center with exchangeable tables according to claim 2, characterized in that, The bottom surface of the table top (3) is provided with a receiving groove (34), the receiving groove (34) is provided with a closed insert strip (35) at the slot opening, the receiving groove (34) and the closed insert strip (35) form the receiving cavity (32), and the upper surface of the closed insert strip (35) forms the second locking surface (33).

5. A gantry machining center with exchangeable tables according to claim 2, characterized in that, The second drive assembly (21) is a locking oil cylinder, the piston rod of the locking oil cylinder is fixedly connected with the support guide rail (2). And / or, the height difference between the third height and the fourth height is 3-5mm.

6. A gantry machining center with exchangeable tables according to claim 2, characterized in that, The support guide rail (2) is provided as two, the first positioning part (11) is provided as two, and the two first positioning parts (11) are located between the two support guide rails (2) and are distributed along the first horizontal direction.

7. The gantry machining center with exchangeable tables according to claim 1, characterized in that, The first driving assembly (12) is a positioning oil cylinder, the upper end of the piston rod of the positioning oil cylinder forms the first positioning part (11); the bottom surface of the table top (3) is provided with a positioning sleeve, the positioning sleeve is provided with a positioning hole matched with the piston rod of the positioning oil cylinder, and the positioning hole forms the second positioning part (31).

8. A gantry machining center with exchangeable tables according to claim 7, characterized in that The positioning oil cylinder is a double-rod oil cylinder, and the bottom of the positioning oil cylinder is provided with an inductive switch (13) for measuring the position of the piston rod of the double-rod oil cylinder.

9. The gantry machining center with exchangeable tables according to claim 1, characterized in that, The table top (3) is connected with a third driving assembly (14) for driving the movement of the table top (3).

10. A gantry machining center with exchangeable tables according to claim 9, characterized in that The third driving assembly (14) is a chain lifting structure.

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