Numerical control machine tool loading and unloading device

Abstract

The invention discloses a numerical control machine tool loading and unloading device, and relates to the technical field of numerical control machine tool loading and unloading. Comprising a stand column fixedly connected to the top end of the center of a transverse plate, a driving machine fixedly connected to the side end of the transverse plate, sliding grooves formed in the two sides of the transverse plate correspondingly, and a positioning assembly fixedly connected to the bottom end of the transverse plate; the side ends, away from the stand columns, of the supporting plates are fixedly connected with servo motors, the side ends, close to the stand columns, of the supporting plates are fixedly connected with clamps, a supporting assembly is connected between the two supporting plates in a matched mode, the adjusting bases are slidably connected in the adjusting grooves, and the side ends, away from the stand columns, of the adjusting bases are fixedly connected with extension frames. The clamp has the beneficial effects that the positioning assembly, the supporting assembly and the limiting assembly are used for reinforcing and supporting different positions of the supporting plate, so that the horizontal height or angle change of the supporting plate is avoided, and the stability of the clamp for clamping a machined element is guaranteed.

Description

Technical Field

[0001] The invention belongs to the field of loading and unloading of numerically controlled machine tools, and in particular relates to a loading and unloading device for numerically controlled machine tools. Background Art

[0002] CNC machine tool is the abbreviation of digital control machine tool. It is an automated machine tool equipped with a program control system. The control system can logically process programs with control codes, decode them, and express them in coded numbers. The information is input into the CNC device through the information carrier. After calculation and processing, the CNC device sends out various control signals to control the movement of the machine tool and automatically process parts according to the shape and size required by the drawing. Among them, the truss clamp is an indispensable key device for CNC machine tools.

[0003] In the prior art, the truss clamp is mainly composed of a clamp, a column and a truss. The truss drives the clamp to clamp the processing element, and the column drives the truss to move, thereby driving the processing element to load and unload materials on the CNC machine tool. The two supporting columns of the truss need to maintain the same height to ensure the horizontal stability of the processing element.

[0004] However, when the truss clamp is loading and unloading processing components for a long time, the horizontal height or angle of the two supporting columns of the truss will change, which will cause the processing components to tilt horizontally when the truss clamp is loading and unloading, and the truss clamp will clamp the processing components unstable, thus affecting the use effect of the truss clamp on the CNC machine tool. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a loading and unloading device for a CNC machine tool, which solves the problem that when a truss clamp is used to load and unload processing elements for a long time, the two support columns of the truss will change in level or angle, which causes the processing elements to tilt horizontally when the truss clamp is loaded and unloaded, and the truss clamp will clamp the processing elements unstably, thereby affecting the use effect of the truss clamp on the CNC machine tool.

[0006] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the present invention, a loading and unloading device for a CNC machine tool is provided, comprising:

[0007] A horizontal plate, wherein the top of the central part of the horizontal plate is fixedly connected to a column, the side ends of the horizontal plate are fixedly connected to a driving machine, sliding grooves are respectively provided on both sides of the horizontal plate, and the bottom end of the horizontal plate is fixedly connected to a positioning component;

[0008] Support plates, wherein two groups of support plates are provided, the support plates are connected with the horizontal plates in cooperation, an adjustment slot is provided at the bottom of the support plates, a servo motor is fixedly connected to the side of the support plates away from the column, a clamp is fixedly connected to the side of the support plates close to the column, and a support assembly is connected between the two groups of support plates; and

[0009] The adjusting seat is slidably connected in the adjusting groove, and an extension frame is fixedly connected to the side end of the adjusting seat away from the column. The extension frame is provided with two groups, and a limiting component is fixedly connected between the two groups of the extension frames.

[0010] As a further solution of the present invention: the support plate is perpendicular to the bottom end of the horizontal plate, and the top end of the support plate is fixedly connected with two groups of connecting plates in a direction parallel to the column. The connecting plates are slidably connected to the slide grooves, and guide plates are provided opposite the two groups of connecting plates. The two ends of the guide plates are respectively fixedly connected to the connecting plates, and the guide plates are slidably connected to the positioning components.

[0011] As a further solution of the present invention: two groups of positioning components are provided, and a central base is fixedly connected between the two groups of positioning components. The positioning components include: side plates and guide rods. The side plates are fixedly connected to the side ends of the columns away from the cross plates, and the side plates are fixedly connected to two groups of guide rods along the width direction of the cross plates. The guide plates are provided with guide holes that penetrate the guide plates in a direction parallel to the center line of the guide rods, and the guide holes are slidably connected to the guide rods.

[0012] As a further solution of the present invention: the top of the central base is vertically fixed on the horizontal plate, and the two ends of the central base are respectively fixedly connected to the two groups of guide rods.

[0013] As a further solution of the present invention: the two ends of the support assembly are fixedly connected with a supporting base, and the supporting base is fixedly connected to the support plate at one end away from the support assembly. The support assembly includes: a support column, a spring and a matching support column, the support column is fixedly connected to the supporting base in a direction perpendicular to the longitudinal surface of the support plate, the support column is sleeved with the matching support column, and the matching support column is fixedly connected to another group of supporting bases in a direction perpendicular to the longitudinal surface of the support plate at one end away from the support column, the spring is between the supporting base and the matching support column, and the two ends of the spring are respectively fixedly connected to the supporting base and the matching support column.

[0014] As a further solution of the present invention: supporting plates are respectively provided around the supporting base and around the center line of the supporting base, the supporting plates are tilted away from the supporting base, and both ends of the supporting plates are respectively fixedly connected to the supporting base and the support plate.

[0015] As a further solution of the present invention: a support hole is opened inside the matching support column, the support hole is slidably connected to the support column, a semi-cylinder is fixedly connected to the inner wall of the support hole around the center line of the support column, a semi-circular groove is opened around the support column around the center line of the matching support column, the semi-cylinder is in a semi-cylindrical shape, and the semi-cylinder is slidably connected to the semi-circular groove.

[0016] As a further solution of the present invention: a threaded hole is longitudinally formed in the adjustment seat, and a threaded rod is threadedly connected in the threaded hole.

[0017] As a further solution of the present invention: the limit assembly includes: a limit rod, a limit matching rod and a limit clamp, the limit rod is provided with two groups, the two groups of limit rods are respectively fixedly connected to the two ends of the extension frame, the limit matching rod is provided with two groups, the two groups of limit matching rods are respectively fixedly connected to the two ends of the extension frame, the limit matching rod and the limit rod are sleeve-connected, and the limit clamp is fixedly connected to one end of the extension frame close to the column.

[0018] Beneficial effects of the present invention:

[0019] 1. The positioning assembly, the supporting assembly and the limiting assembly provide reinforcement support for different positions of the supporting plate, thereby preventing the horizontal height or angle change of the supporting plate and ensuring the stability of the fixture in clamping the processing components.

[0020] 2. When the support plate moves, the support plate drives the adjustment seat to move, and the adjustment seat drives the limit assembly to move through the extension frame. In order to avoid the instability of the clamp clamping the processing element when the above-mentioned positioning assembly and support assembly fail, the limit assembly performs a secondary clamping on the bottom of the processing element to further avoid the problem of the processing element falling off the clamp. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 The right diagram is a general structure diagram of the present invention;

[0024] Figure 3 It is the AA cross-sectional view of the overall structure of the present invention;

[0025] Figure 4 It is a schematic diagram of the connecting plate structure of the present invention;

[0026] Figure 5 It is a schematic diagram of the support column structure of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the adjustment seat of the present invention.

[0028] Illustration: 1. Vertical column; 2. Horizontal plate; 3. Slide groove; 4. Side plate; 5. Support column; 6. Servo motor; 7. Extension frame; 8. Limit rod; 9. Limit matching rod; 10. Limit clamp; 11. Clamp; 12. Support plate; 13. Support base; 14. Central base; 15. Guide rod; 16. Driving machine; 17. Connecting plate; 18. Adjustment groove; 19. Threaded rod; 20. Support column; 21. Spring; 22. Matching support column; 23. Support hole; 25. Guide plate; 26. Guide hole; 27. Semicircular groove; 28. Semicircular cylinder; 29. ​​Adjustment seat; 30. Threaded hole. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figures 1 to 6 As shown, a CNC machine tool loading and unloading device includes: a horizontal plate 2, a support plate 5 and an adjustment seat 29,

[0031] The top of the central part of the horizontal plate 2 is fixedly connected with a column 1, the side end of the horizontal plate 2 is fixedly connected with a driving machine 16, the two sides of the horizontal plate 2 are respectively provided with a slide groove 3, and the bottom end of the horizontal plate 2 is fixedly connected with a positioning assembly. The horizontal plate 2 belongs to the connection structure in the prior art. The column 1 drives the support plate 5 to move through the horizontal plate 2, so as to achieve the effect of loading and unloading the processing components. The driving machine 16 fixedly connected to the top of the horizontal plate 2 has the function of driving the support plate 5. In order to prevent the support plate 5 from changing in horizontal height or angle during long-term operation, the positioning assembly reinforces the connection between the top of the support plate 5 and the horizontal plate 2;

[0032] Two groups of support plates 5 are provided, the support plates 5 are connected with the cross plates 2, an adjustment slot 18 is provided at the bottom of the support plates 5, a servo motor 6 is fixedly connected to the side of the support plates 5 away from the column 1, and a clamp 11 is fixedly connected to the side of the support plates 5 close to the column 1. A support assembly is connected between the two groups of support plates 5, and a driving machine 16 drives the support plates 5 to move at the bottom of the cross plates 2, and the clamp 11 on the support plates 5 clamps the processing element, wherein the support assembly always ensures that the support plates 5 and the cross plates 2 move vertically, and at the same time, the support assembly avoids changes in the horizontal height or angle between the two groups of support plates 5, and the positioning assembly reinforces the middle of the two groups of support plates 5; and

[0033] The adjusting seat 29 is slidably connected in the adjusting groove 18, and the adjusting seat 29 is fixedly connected with an extension frame 7 at the side end away from the column 1. Two groups of extension frames 7 are provided, and a limiting component is fixedly connected between the two groups of extension frames 7. The servo motor 6 can drive the adjusting seat 29 to move in the adjusting groove 18. When the support plate 5 moves, the support plate 5 drives the adjusting seat 29 to move, and the adjusting seat 29 drives the limiting component to move through the extension frame 7. In order to avoid the instability of the clamp 11 clamping the processing element when the above-mentioned positioning component and the support component fail, the limiting component performs a secondary clamping on the bottom of the processing element to further avoid the problem of the processing element falling off on the clamp 11. At the same time, the limiting component reinforces the bottom of the support plate 5, thereby realizing the reinforcement of the support plate 5 as a whole.

[0034] In some specific embodiments, the support plate 5 is perpendicular to the bottom end of the cross plate 2, and two groups of connecting plates 17 are fixedly connected to the top of the support plate 5 in a direction parallel to the column 1. The connecting plates 17 are slidably connected to the slide groove 3. A guide plate 25 is provided opposite the two groups of connecting plates 17. The two ends of the guide plates 25 are respectively fixedly connected to the connecting plates 17, and the guide plates 25 are slidably connected to the positioning assembly. In the prior art, the support plate 5 needs to be perpendicular to the bottom end of the cross plate 2, so as to ensure that the support plate 5 will not have an angular deviation when it moves at the bottom end of the cross plate 2. Among them, the connecting plate 17 fixedly connected to the top of the support plate 5 plays the role of a connecting structure. When the driving machine 16 drives the support plate 5 to move, the connecting plate 17 on the support plate 5 slides along the slide groove 3. However, when the connecting plate 17 is subjected to force for a long time, the connecting plate 17 will be deformed. In order to further strengthen the connecting plate 17, a guide plate 25 is fixedly connected between the two groups of connecting plates 17. The guide plate 25 supports and limits the two groups of connecting plates 17, thereby ensuring the stability of the top of the support plate 5.

[0035] In some specific embodiments, two groups of positioning components are provided, and a central base 14 is fixedly connected between the two groups of positioning components. The positioning components include: a side plate 4 and a guide rod 15. The side plate 4 is fixedly connected to the side end of the column 1 away from the cross plate 2. The side plate 4 is fixedly connected to two groups of guide rods 15 along the width direction of the cross plate 2. The guide plate 25 is provided with a guide hole 26 that passes through the guide plate 25 in a direction parallel to the center line of the guide rod 15. The guide hole 26 is slidably connected to the guide rod 15. In order to ensure that the positioning effect of the positioning component is transmitted to the support plate 5, the positioning component It is connected with the guide plate 25. It should be noted that the central base 14 and the side plate 4 are fixed at the bottom end of the cross plate 2. The central base 14 and the side plate 4 respectively support and fix the two ends of the guide rod 15. The guide hole 26 opened on the guide plate 25 slides along the guide rod 15. At the same time, the guide rod 15 supports the guide hole 26, and further transmits the supporting and fixing effect provided by the cross plate 2 to the connecting plate 17 through the positioning assembly. When the connecting plate 17 is deformed in the vertical direction, the positioning assembly further ensures the stability of the connecting plate 17.

[0036] In some specific embodiments, the top of the central base 14 is vertically fixed on the horizontal plate 2, and the two ends of the central base 14 are respectively fixedly connected to two groups of guide rods 15. In order to avoid only one end of the guide rod 15 being fixedly supported by the side plate 4, the other end of the guide rod 15 is supported and fixed by the central base 14.

[0037] In some specific embodiments, the two ends of the support assembly are fixedly connected with a support base 13, and the support base 13 is fixedly connected to the support plate 5 at one end away from the support assembly. The support assembly includes: a support column 20, a spring 21 and a matching support column 22. The support column 20 is fixedly connected to the support base 13 in a direction perpendicular to the longitudinal surface of the support plate 5. The support column 20 is sleeved with the matching support column 22. The matching support column 22 is fixedly connected to another group of support bases 13 at one end away from the support column 20 in a direction perpendicular to the longitudinal surface of the support plate 5. The spring 21 is between the support base 13 and the matching support column 22. Both ends of the spring 21 are respectively connected to the support base 13. The supporting base 13 and the cooperating support column 22 are fixedly connected. In order to ensure that the middle part of the support plate 5 is reinforced, when the support plate 5 moves, the supporting assembly is compressed between the two groups of support plates 5, and the support column 20 is inserted into the cooperating support column 22. The support column 20 and the cooperating support column 22 reinforce and support the support plate 5 to avoid horizontal height or angle changes in the middle part of the support plate 5. In order to avoid angular deviation of the cooperating support column 22, the spring 21 is always in a compressed state. The spring 21 provides supporting force to the supporting base 13 and the cooperating support column 22, further strengthening the cooperating support column 22 in a direction perpendicular to the support plate 5.

[0038] In some specific embodiments, supporting plates 12 are respectively provided around the supporting base 13 and around the center line of the supporting base 13. The supporting plates 12 are tilted away from the supporting base 13. Both ends of the supporting plates 12 are respectively fixedly connected to the supporting base 13 and the supporting plate 5. In order to prevent the supporting base 13 from being deformed due to long-term force, supporting plates 12 are provided around the supporting base 13. Both ends of the supporting plates 12 are fixed with the supporting base 13 and the supporting plate 5 to form a triangle in cross section. According to the geometric principle of triangle, the supporting plates 12 further reinforce the supporting base 13 to prevent the supporting assembly from being offset due to deformation of the supporting base 13.

[0039] In some specific implementation schemes, a supporting hole 23 is provided inside the supporting column 22, and the supporting hole 23 is slidably connected to the supporting column 20. A semi-cylinder 28 is fixedly connected to the inner wall of the supporting hole 23 around the center line of the supporting column 20, and a semi-circular groove 27 is provided around the supporting column 20 around the center line of the supporting column 22. The semi-cylinder 28 is in the shape of a semi-cylinder, and the semi-cylinder 28 is slidably connected to the semi-circular groove 27. In order to further improve the limiting support provided by the sleeve connection between the supporting column 22 and the supporting column 20 to the supporting plate 5 The supporting effect is achieved by the semi-cylinder 28 and the semi-circular groove 27 fixedly connected to the inner wall of the supporting column 22, which increases the contact area between the supporting column 22 and the supporting column 20, and strengthens the limiting effect provided by the supporting column 22 and the supporting column 20 on the supporting plate 5. At the same time, the semi-cylinder 28 and the semi-circular groove 27 avoid the problem of deformation of the supporting column 22 and the supporting column 20. When the support column 20 is inserted into the supporting hole 23 opened by the supporting column 22, the semi-cylinder 28 slides along the semi-circular groove 27.

[0040] In some specific embodiments, a threaded hole 30 is longitudinally opened in the adjustment seat 29, and a threaded rod 19 is threadedly connected to the threaded hole 30. The servo motor 6 drives the threaded rod 19 to rotate, and the threaded rod 19 drives the adjustment seat 29 to move by being threadedly connected to the threaded hole 30, thereby realizing that the adjustment seat 29 drives the limit assembly to move through the extension frame 7.

[0041] In some specific implementation schemes, the limit assembly includes: a limit rod 8, a limit matching rod 9 and a limit clamp 10. The limit rod 8 is provided with two groups, and the two groups of limit rods 8 are respectively fixedly connected to the two ends of the extension frame 7. The limit matching rod 9 is provided with two groups, and the two groups of limit matching rods 9 are respectively fixedly connected to the two ends of the extension frame 7. The limit matching rod 9 and the limit rod 8 are sleeve-connected. The limit clamp 10 is fixedly connected to one end of the extension frame 7 close to the column 1. The limit clamp 10 on the limit assembly clamps the bottom of the processing element. The limit matching rod 9 and the limit rod 8 are sleeve-connected to achieve the effect of reinforcing the bottom of the support plate 5. When the thickness of the processing element changes, the adjustment seat 29 can drive the limit assembly to adjust the height through the extension frame 7, thereby improving the applicability of the limit assembly.

[0042] In order to facilitate the understanding of this solution by those skilled in the art, the working principle of this solution is now explained in combination with specific application scenarios:

[0043] When the driving machine 16 drives the support plate 5 to move at the bottom end of the cross plate 2, the connecting plate 17 fixedly connected to the top of the support plate 5 slides along the slide groove 3, and the guide plate 25 fixedly connected to the connecting plate 17 slides along the guide rod 15. The positioning assembly in the middle of the support plate 5 is compressed, and the support column 20 of the positioning assembly is inserted into the support hole 23 of the matching support column 22, and the limiting rod 8 at the bottom of the support plate 5 is inserted into the limiting matching rod 9. When the connecting plate 17 is under force for a long time, the connecting plate 17 will be deformed, and the guide plate 25 reinforces and supports the connecting plate 17 to prevent the connection from being deformed. The plate 17 is deformed to ensure the stability of the top of the support plate 5. If the positioning assembly reinforcement fails, the sleeve connection of the support column 20 and the matching support column 22 supports the middle of the support plate 5 to ensure the stability of the middle of the support plate 5. The limiting rod 8 and the limiting matching rod 9 limit the bottom of the support plate 5 to ensure the stability of the bottom of the support plate 5. Therefore, the positioning assembly, the supporting assembly and the limiting assembly reinforce and support different positions of the support plate 5, thereby avoiding changes in the horizontal height or angle of the support plate 5, and ensuring the stability of the clamp 11 in clamping the processing element;

[0044] Among them, it is necessary to explain that: when the support plate 5 moves, the support plate 5 drives the adjustment seat 29 to move, and the adjustment seat 29 drives the limit assembly to move through the extension frame 7. In order to avoid the instability of the clamp 11 clamping the processing element when the above-mentioned positioning assembly and the support assembly fail, the limit assembly clamps the bottom of the processing element for a second time to further avoid the problem of the processing element falling off the clamp 11. The central base 14 and the side plate 4 are fixed at the bottom end of the horizontal plate 2, and the central base 14 and the side plate 4 respectively clamp the two ends of the guide rod 15 The guide holes 26 on the guide plate 25 slide along the guide rods 15. Meanwhile, the guide rods 15 support the guide holes 26. The supporting and fixing effect provided by the cross plate 2 is further transmitted to the connecting plate 17 through the positioning assembly. When the connecting plate 17 is deformed in the vertical direction, the positioning assembly further ensures the stability of the connecting plate 17. In order to prevent the supporting base 13 from being deformed due to long-term force, the supporting base 13 is surrounded by supporting plates 12. The two ends of the supporting plate 12 are connected to the supporting base 13 and the supporting plate 5. The fixed cross section forms a triangle. According to the geometric principle of triangle, the abutment plate 12 further reinforces the abutment base 13 to prevent the abutment base 13 from being deformed and causing the support assembly to deviate. In order to further improve the limiting support effect provided by the sleeve connection of the supporting column 22 and the supporting column 20 to the supporting plate 5, the semi-cylinder 28 and the semi-circular groove 27 fixedly connected to the inner wall of the supporting column 22 are limitedly connected, which increases the contact area between the supporting column 22 and the supporting column 20, and strengthens the supporting column 22 and the supporting column 20 on the supporting plate 5. The limiting function is provided. At the same time, the semi-cylinder 28 and the semi-circular groove 27 avoid the problem of deformation of the matching support column 22 and the support column 20. When the support column 20 is inserted into the support hole 23 opened by the matching support column 22, the semi-cylinder 28 slides along the semi-circular groove 27. The limiting matching rod 9 and the limiting rod 8 are connected by sleeve arrangement to achieve the effect of reinforcing the bottom of the support plate 5. Among them, when the thickness of the processing element changes, the adjustment seat 29 can drive the limiting component to adjust the height through the extension frame 7, thereby improving the applicability of the limiting component.

[0045] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A loading and unloading device for a CNC machine tool, characterized in that: include: A horizontal plate (2), wherein the central top of the horizontal plate (2) is fixedly connected to a column (1), the side ends of the horizontal plate (2) are fixedly connected to a driving machine (16), sliding grooves (3) are respectively provided on both sides of the horizontal plate (2), and the bottom end of the horizontal plate (2) is fixedly connected to a positioning assembly; A support plate (5), wherein the support plate (5) is provided with two groups, the support plate (5) is connected in cooperation with the horizontal plate (2), an adjustment slot (18) is provided at the bottom end of the support plate (5), a servo motor (6) is fixedly connected to the side end of the support plate (5) away from the column (1), a clamp (11) is fixedly connected to the side end of the support plate (5) close to the column (1), and a support assembly is connected in cooperation between the two groups of support plates (5); and An adjustment seat (29) is slidably connected in the adjustment slot (18); the adjustment seat (29) is fixedly connected to an extension frame (7) at the side end away from the column (1); the extension frame (7) is provided with two groups, and a limiting component is fixedly connected between the two groups of the extension frames (7).

2. A CNC machine tool loading and unloading device according to claim 1, characterized in that: The support plate (5) is perpendicular to the bottom end of the horizontal plate (2), and the top end of the support plate (5) is fixedly connected with two groups of connecting plates (17) in a direction parallel to the column (1). The connecting plates (17) are slidably connected to the slide grooves (3). A guide plate (25) is provided opposite to the two groups of connecting plates (17). The two ends of the guide plate (25) are respectively fixedly connected to the connecting plates (17), and the guide plate (25) is slidably connected to the positioning assembly.

3. A CNC machine tool loading and unloading device according to claim 2, characterized in that: Two groups of positioning components are provided, and a central base (14) is fixedly connected between the two groups of positioning components. The positioning components include: a side plate (4) and a guide rod (15), wherein the side plate (4) is fixedly connected to the side end of the column (1) away from the cross plate (2), and the side plate (4) is fixedly connected to two groups of guide rods (15) along the width direction of the cross plate (2), and the guide plate (25) is provided with a guide hole (26) penetrating the guide plate (25) in a direction parallel to the center line of the guide rod (15), and the guide hole (26) is slidably connected to the guide rod (15).

4. A CNC machine tool loading and unloading device according to claim 3, characterized in that: The top of the central base (14) is vertically fixed on the horizontal plate (2), and the two ends of the central base (14) are respectively fixedly connected to two groups of guide rods (15).

5. A loading and unloading device for a CNC machine tool according to claim 1, characterized in that: The supporting assembly is fixedly connected with a supporting base (13) at both ends, and the supporting base (13) is fixedly connected to the supporting plate (5) at one end away from the supporting assembly. The supporting assembly comprises: a supporting column (20), a spring (21) and a matching supporting column (22). The supporting column (20) is fixedly connected to the supporting base (13) in a direction perpendicular to the longitudinal surface of the supporting plate (5). The supporting column (20) and the matching supporting column (22) are sleeve-connected. The matching supporting column (22) is fixedly connected to another group of supporting bases (13) in a direction perpendicular to the longitudinal surface of the supporting plate (5) at one end away from the supporting column (20). The spring (21) is between the supporting base (13) and the matching supporting column (22). The two ends of the spring (21) are fixedly connected to the supporting base (13) and the matching supporting column (22) respectively.

6. A loading and unloading device for a CNC machine tool according to claim 5, characterized in that: The abutment base (13) is provided with abutment plates (12) around the center line of the abutment base (13), the abutment plates (12) are arranged obliquely away from the abutment base (13), and the two ends of the abutment plates (12) are respectively fixedly connected to the abutment base (13) and the support plate (5).

7. A loading and unloading device for a CNC machine tool according to claim 5, characterized in that: A support hole (23) is provided inside the matching support column (22), and the support hole (23) is slidably connected to the support column (20). A semi-cylinder (28) is fixedly connected to the inner wall of the support hole (23) around the center line of the support column (20), and a semi-circular groove (27) is provided around the support column (20) around the center line of the matching support column (22). The semi-cylinder (28) is in a semi-cylindrical shape, and the semi-cylinder (28) is slidably connected to the semi-circular groove (27).

8. A loading and unloading device for a CNC machine tool according to claim 1, characterized in that: The adjustment seat (29) is longitudinally provided with a threaded hole (30), and the threaded hole (30) is internally threadedly connected with a threaded rod (19).

9. A loading and unloading device for a CNC machine tool according to claim 1, characterized in that: The limiting assembly comprises: a limiting rod (8), a limiting matching rod (9) and a limiting clamp (10); the limiting rod (8) is provided with two groups, and the two groups of limiting rods (8) are respectively fixedly connected to the two ends of the extension frame (7); the limiting matching rod (9) is provided with two groups, and the two groups of limiting matching rods (9) are respectively fixedly connected to the two ends of the extension frame (7); the limiting matching rod (9) and the limiting rod (8) are sleeve-connected, and the limiting clamp (10) is fixedly connected to one end of the extension frame (7) close to the column (1).

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