Double-end-face horizontal boring and milling machine

Abstract

The utility model relates to the technical field of horizontal milling machines, in particular to a double-end-face horizontal boring and milling machine which comprises a base and supporting boxes, the base is connected with the surfaces of the two supporting boxes in a sliding and clamping mode through sliding ways symmetrically formed in the surfaces, and the supporting boxes are connected with the surface of a transverse plate in a sliding and clamping mode through sliding ways formed in the surfaces. One end of the transverse plate penetrates through the surface of the supporting box through a sliding way formed in the surface of the supporting box, and the transverse plate is in threaded connection with the first lead screw through a threaded hole formed in the surface of the transverse plate. The gear can be matched with teeth on the surface of the sliding plate, the shell can move, the shell can drive the milling cutter to rapidly return to a base point, the milling cutter can rapidly conduct next-time machining, the cutter can be rapidly retracted and reset, the device can rapidly conduct second-time feeding, and the working efficiency of the device can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of horizontal milling machines, in particular to a double-end-face horizontal boring and milling machine. Background Art

[0002] The double-end horizontal milling machine is a type of milling machine that can perform milling on both sides of a workpiece at the same time. It is suitable for oversized workpieces that are not easy to flip.

[0003] For example, a double-end horizontal milling machine with the authorization announcement number "CN220178258U" can be raised and lowered by the support assembly in the support structure. When the ground is uneven, it can be adjusted to ensure the support effect of the support structure. It has a simple structure and good use effect. The support assembly is detachable and easy to remove for replacement. A wear-resistant pad is set at the lower end of the bottom plate so that the support assembly can be used for a long time. However, the device is not convenient for quickly retracting the milling cutter. The device needs to be driven by a motor to drive the lead screw so that the milling cutter in the device can move slowly. When the milling machine is working, the feed needs to be slow and accurate, but the slow retraction will affect the working efficiency of the device. At the same time, the device uses the structure to level the equipment, which makes the preparation process of the device relatively slow during work, making the device inconvenient to use. Utility Model Content

[0004] The utility model aims to solve the problems of low working efficiency and inconvenience in use of the device, and proposes a double-end-face horizontal boring and milling machine.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A double-end horizontal boring and milling machine is designed, including a base and a support box, the base is slidably connected to the surfaces of two support boxes through slides symmetrically opened on the surface, the support box is slidably connected to the surface of a cross plate through a slide opened on the surface, one end of the cross plate passes through the surface of the support box through a slide opened on the surface of the support box, the cross plate is threadedly connected to a first lead screw through a threaded hole opened on the surface, both ends of the first lead screw are rotatably connected to the inner surface of the support box through bearings, the surface of the cross plate is fixedly connected to a slide box, the surface of the slide box is slidably connected to the surface of a slide plate, the slide plate is slidably connected to the protruding part of the outer shell surface through the slide opened on the surface, a quick reset device is provided inside the outer shell, and an auxiliary support device is symmetrically fixedly connected to the surface of the base.

[0007] Preferably, the quick reset device includes a spring block and a first hydraulic cylinder, the first hydraulic cylinder is fixedly connected to the surface of the slide board, the telescopic end of the first hydraulic cylinder is fixedly connected to the spring block, the spring block is slidably engaged with the block surface through a slideway opened on the surface, the block surface and two ends of the first spring are fixedly connected, the block surface is fixedly connected with a first inclined block, the inner surface of the outer shell is fixedly connected with a second inclined block, the block surface is tightly pressed against the protruding part of the sleeve surface, the sleeve surface is engaged with the groove opened on the surface of the slide board, the inner surface of the sleeve is slidably engaged with the vertical rod surface, and one end of the vertical rod and the inner surface of the sleeve are respectively fixedly connected to the two ends of the second spring.

[0008] Preferably, the inner surface of the shell is fixedly connected to a first motor via a bracket, the output shaft of the first motor is rotatably connected to a gear via a reduction box, the protruding portion of the gear surface is rotatably connected to the inner surface of the shell via a bearing, and the gear is meshed with teeth provided on the surface of the skateboard.

[0009] Preferably, a roller plate is fixedly connected to the inner surface of the shell, the surface of the roller plate is rotatably connected to the roller via a pin, the roller is rotatably connected to the surface of the skateboard, the surface of the skateboard is fixedly connected to a lead screw nut, and the lead screw nut is slidably engaged with a slide opened on the inner surface of the slide box.

[0010] Preferably, the surface of the slide box is fixedly connected to the second motor through a bracket, the output shaft of the second motor is fixedly connected to one end of the second screw, both ends of the second screw are rotatably connected to the inner surface of the slide box through bearings, and the surface of the second screw is threadedly connected to the screw nut.

[0011] Preferably, the surface of the base is fixedly connected to a support table, the surface of the support table is fixedly connected to a processing table, the surface of the support box is fixedly connected to the third motor through a bracket, and the output shaft of the third motor is fixedly connected to one end of the first screw.

[0012] Preferably, the surface of the base is symmetrically fixedly connected to a mounting plate, the surface of the mounting plate is fixedly connected to a fixing box, the inner surface of the fixing box is fixedly connected to a second hydraulic cylinder, the telescopic end of the second hydraulic cylinder passes through the surface of the fixing box and is fixedly connected to the surface of the supporting box, the surface of the outer shell is fixedly connected to a processing module, and the surface of the processing module is fixedly connected to the milling cutter.

[0013] Preferably, the auxiliary support device includes a fourth motor and a threaded rod, the fourth motor is fixedly connected to a groove opened in the surface of the support platform through a bracket, the output shaft of the fourth motor is fixedly connected to a threaded rod, one end of the threaded rod is rotatably connected to the protruding part of the base surface through a bearing, the surface of the threaded rod is threadedly connected to the surface of the rotating shaft block, the surface of the rotating shaft block is slidably engaged with a slideway opened in the surface of the base, the surface of the rotating shaft block is movably connected to one end of the rotating rod through a pin shaft, one end of the rotating rod is movably connected to the protruding part of the surface of the sliding column through a pin shaft, the sliding column is slidably connected to the surface of the straight rod through the slideway opened on the surface, one end of the straight rod is fixedly connected to the surface of the base, the surface of the sliding column is fixedly connected to the surface of the support plate, and the surface of the support plate is tightly pressed against the surface of the slide box.

[0014] The utility model proposes a double-end horizontal boring and milling machine, which has the following beneficial effects: through the cooperation of the rapid reset device and the auxiliary support device, the telescopic end of the second hydraulic cylinder is extended to push the support box away from the workpiece, so that the milling cutter can be separated from the workpiece surface, and the telescopic end of the first hydraulic cylinder is extended to drive the spring block to move, so that the spring block can drive the clamping block to push the sleeve to move, so that the sleeve can compress the second spring, so that the sleeve can be clamped with the groove on the surface of the slide plate, at this time, the telescopic end of the first hydraulic cylinder continues to extend slowly, the output shaft of the first motor rotates to drive the gear to rotate, so that the gear can cooperate with the teeth on the surface of the slide plate, so that the shell can move, and the shell can drive the milling cutter to quickly return to the base point, so that the milling cutter can quickly perform the next processing, and the tool can be quickly retracted and reset, so that the device can perform a fast second feed, so that the working efficiency of the device can be improved.

[0015] Through the cooperation of the base and the auxiliary supporting device, the output shaft of the third motor drives the first screw to rotate, so that the first screw can drive the cross plate to rise and fall, so that the milling cutter can move up and down; the output shaft of the fourth motor drives the threaded rod to rotate, so that the threaded rod can drive the rotating shaft block to move, so that the rotating shaft block can drive the sliding column to rise and fall through the rotating rod, so that the sliding column can support the lifting and lowering movement of the slide box through the support plate; the output shaft of the second motor drives the second screw to rotate, so that the slide plate can drive the milling cutter to feed horizontally, so that the workpiece can be processed; through the flat base, the equipment can be made more horizontal, and at the same time, the equipment can be stably supported, so that the device can be prepared faster and more convenient in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 for Figure 1 A front view of

[0018] Figure 3 for Figure 1 A top view of

[0019] Figure 4 for Figure 1 A front cross-sectional view of

[0020] Figure 5 for Figure 1 A partial front view of

[0021] Figure 6 for Figure 4 Schematic diagram of part A;

[0022] Figure 7 for Figure 5 Schematic diagram of part B.

[0023] In the figure: 1, base, 2, support box, 3, horizontal plate, 4, first lead screw, 5, third motor, 6, housing, 7, quick reset device, 701, second inclined block, 702, vertical rod, 703, spring block, 704, sleeve, 705, second spring, 706, first hydraulic cylinder, 707, first spring, 708, first inclined block, 709, clamping block, 8, lead screw nut, 9, auxiliary support device, 901, fourth motor , 902, threaded rod, 903, shaft block, 904, rotating rod, 905, straight rod, 906, sliding column, 10, processing module, 11, milling cutter, 12, processing table, 13, support table, 14, mounting plate, 15, fixed box, 16, second hydraulic cylinder, 17, slide plate, 18, slide box, 19, second motor, 20, roller plate, 21, roller, 22, gear, 23, first motor, 24, second screw. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings:

[0025] See attached Figure 1-7 : In the present embodiment, a double-end horizontal boring and milling machine comprises a base 1 and a supporting box 2, the base 1 is slidably connected with the surfaces of the two supporting boxes 2 through slideways symmetrically opened on the surface, and the moving tracks of the supporting boxes 2 on both sides are fixed, the supporting boxes 2 are slidably connected with the surfaces of the cross plates 3 through the slideways opened on the surface, one end of the cross plates 3 passes through the surface of the supporting box 2 through the slideways opened on the surface of the supporting box 2, the cross plates 3 are threadedly connected with the first lead screw 4 through the threaded holes opened on the surface, the first lead screw 4 can drive the cross plates 3 to rise and fall, both ends of the first lead screw 4 are rotatably connected with the inner surface of the supporting box 2 through bearings, the surface of the cross plates 3 is fixedly connected with a slide box 18, the surface of the slide box 18 is slidably connected with the surface of the slide plate 17, the slide plate 17 is slidably connected with the protruding part of the surface of the shell 6 through the slideways opened on the surface, the slide plate 17 can fix the moving track of the shell 6 through the slideways opened on the surface, a quick reset device 7 is provided inside the shell 6, and an auxiliary supporting device 9 is symmetrically fixedly connected with the surface of the base 1;

[0026] The inner surface of the shell 6 is fixedly connected with a first motor 23 through a bracket. The first motor 23 can meet the working needs according to actual needs. The output shaft of the first motor 23 is rotatably connected with the gear 22 through a reduction box. The first motor 23 can drive the gear 22 to rotate. The protruding part of the surface of the gear 22 is rotatably connected with the inner surface of the shell 6 through a bearing. The gear 22 is meshed with the teeth provided on the surface of the skateboard 17. The rotation of the gear 202 can cooperate with the teeth on the surface of the skateboard 17, so that the shell 6 can move quickly. The inner surface of the shell 6 is fixedly connected with a roller plate 20. The surface of the roller plate 20 is rotatably connected with the roller 21 through a pin shaft. The roller 21 is rotatably connected with the surface of the skateboard 17. The surface of the skateboard 17 is fixedly connected with a lead screw nut 8. The lead screw nut 8 is slidably engaged with the slideway provided on the inner surface of the slideway box 18. The lead screw nut 8 can fix the motion track of the skateboard 17.

[0027] The surface of the slide box 18 is fixedly connected to the second motor 19 through a bracket. The second motor 19 can meet the working needs according to actual needs. The output shaft of the second motor 19 is fixedly connected to one end of the second lead screw 24. The second motor 19 can drive the second lead screw 24 to rotate. Both ends of the second lead screw 24 are rotatably connected to the inner surface of the slide box 18 through bearings. The surface of the second lead screw 24 is threadedly connected to the lead screw nut 8. The second lead screw 24 can drive the lead screw nut 8 to move, so that the lead screw nut 8 can drive the slide plate 17 to move synchronously. The surface of the base 1 is fixedly connected to the support table 13, and the surface of the support table 13 is fixedly connected to the processing table 12. The surface of the support box 2 is fixedly connected to the third motor 5 through a bracket. The third motor 5 can meet the working needs according to actual needs. The third motor The machine 5 can drive the first screw 4 to rotate, the output shaft of the third motor 5 is fixedly connected to one end of the first screw 4, the surface of the base 1 is symmetrically fixedly connected with a mounting plate 14, the surface of the mounting plate 14 is fixedly connected with a fixed box 15, the inner surface of the fixed box 15 is fixedly connected with a second hydraulic cylinder 16, the second hydraulic cylinder 16 can meet the work needs according to actual needs, the second hydraulic cylinder 16 can drive the support box 2 to move, the telescopic end of the second hydraulic cylinder 16 passes through the surface of the fixed box 15 and is fixedly connected to the surface of the support box 2, the surface of the outer shell 6 is fixedly connected with a processing module 10, the processing module 10 can drive the milling cutter 11 to rotate to process the workpiece, the processing module 10 has been disclosed in the prior art and will not be repeated here. The surface of the processing module 10 is fixedly connected to the milling cutter 11.

[0028] See attached Figure 1-7: The quick reset device 7 includes a spring block 703 and a first hydraulic cylinder 706. The first hydraulic cylinder 706 is fixedly connected to the surface of the slide plate 17. The first hydraulic cylinder 706 can meet the working needs according to actual needs. The first hydraulic cylinder 706 can drive the spring block 703 to move. The telescopic end of the first hydraulic cylinder 706 is fixedly connected with the spring block 703. The spring block 703 is slidably connected with the surface of the block 709 through the slideway opened on the surface, and the moving track of the block 709 is fixed. The surface of the block 709 and the two ends of the first spring 707 are fixedly connected. The elastic coefficient of the first spring 707 can meet the working needs according to actual needs. The first spring 707 can allow the block 709 to have movement space. The surface of the block 709 is fixedly connected with the first inclined block 708, and the housing 6 The inner surface is fixedly connected with a second inclined block 701. When the first inclined block 708 is pressed against the surface of the second inclined block 701, the first inclined block 708 will no longer be pressed against the protruding part of the sleeve 704 surface under the action of the inclined surface. The surface of the clamping block 709 is pressed against the protruding part of the sleeve 704 surface. The surface of the sleeve 704 is clamped with the grooves provided on the surface of the slide plate 17. The surface of the slide plate 17 is provided with multiple groups of grooves. The inner surface of the sleeve 704 is slidably clamped with the surface of the vertical rod 702. One end of the vertical rod 702 and the inner surface of the sleeve 704 are respectively fixedly connected with the two ends of the second spring 705. The elastic coefficient of the second spring 705 can meet the working needs according to actual needs. The second spring 705 can allow the sleeve 704 to have movement space, and the vertical rod 702 can fix the movement track of the sleeve 704.

[0029] See attached Figure 1-7: The auxiliary support device 9 includes a fourth motor 901 and a threaded rod 902. The fourth motor 901 is fixedly connected to the groove opened on the surface of the support platform 13 through a bracket. The fourth motor 901 can meet the working needs according to actual needs. The fourth motor 901 can drive the threaded rod 902 to rotate. The output shaft of the fourth motor 901 is fixedly connected to the threaded rod 902. One end of the threaded rod 902 is rotatably connected to the protruding part of the surface of the base 1 through a bearing. The surface of the threaded rod 902 is threadedly connected to the surface of the rotating shaft block 903. The threaded rod 902 can drive the rotating shaft block 903 to move. The surface of the rotating shaft block 903 is slidably engaged with the slideway opened on the surface of the base 1 to fix the moving track of the rotating shaft block 903. The surface of the rotating shaft block 903 is connected to the slideway on the surface of the base 1. The rotating rod 904 is movably connected to one end of the rotating rod 904 through a pin shaft, and one end of the rotating rod 904 is movably connected to the protruding part of the surface of the sliding column 906 through a pin shaft. The rotating rod 904 can drive the sliding column 906 to rise and fall, and the sliding column 906 is slidably connected to the surface of the straight rod 905 through a slideway opened on the surface. The straight rod 905 can fix the movement track of the sliding column 906, and one end of the straight rod 905 is fixedly connected to the surface of the base 1, and the surface of the sliding column 906 is fixedly connected to the surface of the support plate 907. The sliding column 906 can drive the support plate 907 to rise and fall, so that the support plate 907 can provide auxiliary support to the surface of the slide box 18, and at the same time, the support plate 907 can be synchronously lifted and lowered following the slide box 18, and the surface of the support plate 907 is tightly pressed against the surface of the slide box 18.

[0030] Working principle:

[0031] When the workpiece is subjected to double-end milling machine processing, the workpiece is placed on the surface of the processing table 12 and fixed by a clamp, etc. The clamp has been disclosed in the prior art and will not be described in detail here. The external power supply of the processing modules 10 on both sides is turned on, and the processing modules 10 on both sides are started to drive the milling cutters 11 on both sides to rotate, so that the milling cutters 11 on both sides can move to process the surfaces of both sides of the workpiece.

[0032] Milling process:

[0033] Connect the external power supply of the third motor 5, start the output shaft of the third motor 5 to rotate and drive the first lead screw 4 to rotate, so that the first lead screw 4 can drive the cross plate 3 to rise and fall, and the milling cutter 11 can move up and down, and at the same time connect the external power supply of the fourth motor 901, start the output shaft of the fourth motor 901 to rotate and drive the threaded rod 902 to rotate, so that the threaded rod 903 can drive the rotating shaft block 903 to move, so that the rotating shaft block 903 can drive the sliding column 906 to rise and fall through the rotating rod 904, so that the sliding column 906 can support the lifting and lowering movement of the slide box 18 through the support plate 907, connect the external power supply of the second motor 19, start the output shaft of the second motor 19 to rotate and drive the second lead screw 24 to rotate, so that the second lead screw 24 can drive the lead screw nut 8 to move, so that the lead screw nut 8 can drive the slide plate 17 to move, so that the slide plate 17 can drive the milling cutter 11 to feed horizontally, so that the workpiece can be processed.

[0034] Retraction process:

[0035] When the milling cutter 11 is fed once, the external power supply of the second hydraulic cylinder 16 is turned on, and the telescopic end of the second hydraulic cylinder 16 is started to extend to push the support box 2 away from the workpiece, so that the milling cutter 11 can be separated from the workpiece surface. The external power supply of the first hydraulic cylinder 706 is turned on, and the telescopic end of the first hydraulic cylinder 706 is started to extend to drive the spring block 703 to move, so that the spring block 703 can drive the clamping block 709 to push the sleeve 704 to move, so that the sleeve 704 can compress the second spring 705, so that the sleeve 704 can be clamped with the groove on the surface of the slide plate 17. At this time, the telescopic end of the first hydraulic cylinder 706 continues to extend slowly, and the first motor 2 is turned on at the same time. 3, the output shaft of the first motor 23 is started to rotate and drive the gear 22 to rotate, so that the gear 22 can cooperate with the teeth on the surface of the slide plate 17, so that the housing 6 can move, and the housing 6 can drive the milling cutter 11 to quickly return to the base point. At this time, the telescopic end of the first hydraulic cylinder 706 drives the first inclined block 708 and the second inclined block 701 to press against the surface, so that the first inclined block 708 drives the clamping block 709 to compress the first spring 707, so that the clamping block 709 is no longer pressed against the surface of the sleeve 704. Under the push of the second spring 705, the sleeve 704 can be quickly clamped with the groove on the surface of the slide plate 17, so that the milling cutter 11 can quickly perform the next processing.

[0036] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A double-end horizontal boring and milling machine, comprising a base (1) and a support box (2), wherein the base (1) is slidably engaged with the surfaces of two support boxes (2) via slideways symmetrically provided on the surface, and is characterized in that: The support box (2) is slidably connected to the surface of the cross plate (3) through a slideway provided on the surface; one end of the cross plate (3) passes through the surface of the support box (2) through a slideway provided on the surface of the support box (2); the cross plate (3) is threadedly connected to the first lead screw (4) through a threaded hole provided on the surface; both ends of the first lead screw (4) are rotatably connected to the inner surface of the support box (2) through bearings; the surface of the cross plate (3) is fixedly connected to a slide box (18); the surface of the slide box (18) is slidably connected to the surface of the slide plate (17); the slide plate (17) is slidably connected to the protruding part of the surface of the outer shell (6) through the slideway provided on the surface; a quick reset device (7) is provided inside the outer shell (6); and the surface of the base (1) is symmetrically fixedly connected to an auxiliary support device (9).

2. A double-end horizontal boring and milling machine according to claim 1, characterized in that: The quick reset device (7) comprises a spring block (703) and a first hydraulic cylinder (706), wherein the first hydraulic cylinder (706) is fixedly connected to the surface of the slide plate (17), the telescopic end of the first hydraulic cylinder (706) is fixedly connected to the spring block (703), the spring block (703) is slidably engaged with the surface of a clamping block (709) through a slideway provided on the surface, the surface of the clamping block (709) is fixedly connected to the two ends of the first spring (707), and the surface of the clamping block (709) is fixedly engaged with the two ends of the first spring (707). A first inclined block (708) is connected, and the inner surface of the housing (6) is fixedly connected to a second inclined block (701), the surface of the clamping block (709) is tightly abutted against a protruding portion of the surface of the sleeve (704), the surface of the sleeve (704) is clamped with a groove provided on the surface of the slide plate (17), the inner surface of the sleeve (704) is slidably clamped with the surface of the vertical rod (702), and one end of the vertical rod (702) and the inner surface of the sleeve (704) are respectively fixedly connected to the two ends of the second spring (705).

3. A double-end horizontal boring and milling machine according to claim 1, characterized in that: The inner surface of the housing (6) is fixedly connected to a first motor (23) via a bracket; the output shaft of the first motor (23) is rotationally connected to a gear (22) via a reduction box; a protruding portion of the surface of the gear (22) is rotationally connected to the inner surface of the housing (6) via a bearing; and the gear (22) is meshed with teeth provided on the surface of the skateboard (17).

4. A double-end horizontal boring and milling machine according to claim 1, characterized in that: The inner surface of the housing (6) is fixedly connected to a roller plate (20), the surface of the roller plate (20) is rotationally connected to a roller (21) via a pin shaft, the roller (21) is rotationally connected to the surface of a slide plate (17), the surface of the slide plate (17) is fixedly connected to a lead screw nut (8), and the lead screw nut (8) is slidably engaged with a slideway provided on the inner surface of the slideway box (18).

5. A double-end horizontal boring and milling machine according to claim 4, characterized in that: The surface of the slide box (18) is fixedly connected to the second motor (19) via a bracket, the output shaft of the second motor (19) is fixedly connected to one end of the second lead screw (24), both ends of the second lead screw (24) are rotatably connected to the inner surface of the slide box (18) via bearings, and the surface of the second lead screw (24) is threadedly connected to the lead screw nut (8).

6. A double-end horizontal boring and milling machine according to claim 1, characterized in that: The surface of the base (1) is fixedly connected to a support platform (13), the surface of the support platform (13) is fixedly connected to a processing platform (12), the surface of the support box (2) is fixedly connected to a third motor (5) via a bracket, and the output shaft of the third motor (5) is fixedly connected to one end of the first lead screw (4).

7. A double-end horizontal boring and milling machine according to claim 1, characterized in that: The surface of the base (1) is symmetrically fixedly connected to a mounting plate (14), the surface of the mounting plate (14) is fixedly connected to a fixing box (15), the inner surface of the fixing box (15) is fixedly connected to a second hydraulic cylinder (16), the telescopic end of the second hydraulic cylinder (16) penetrates the surface of the fixing box (15) and is fixedly connected to the surface of the supporting box (2), the surface of the outer shell (6) is fixedly connected to a processing module (10), and the surface of the processing module (10) is fixedly connected to a milling cutter (11).

8. The double-end horizontal boring and milling machine according to claim 1, characterized in that: The auxiliary support device (9) comprises a fourth motor (901) and a threaded rod (902); the fourth motor (901) is fixedly connected to a groove provided on the surface of the support platform (13) via a bracket; the output shaft of the fourth motor (901) is fixedly connected to the threaded rod (902); one end of the threaded rod (902) is rotatably connected to a protruding portion on the surface of the base (1) via a bearing; the surface of the threaded rod (902) is threadedly connected to the surface of a rotating shaft block (903); the surface of the rotating shaft block (903) is threadedly connected to a sliding groove provided on the surface of the base (1); The surface of the rotating shaft block (903) is movably connected to one end of the rotating rod (904) through a pin shaft, one end of the rotating rod (904) is movably connected to the protruding part of the surface of the sliding column (906) through a pin shaft, the sliding column (906) is slidably connected to the surface of the straight rod (905) through a slideway provided on the surface, one end of the straight rod (905) is fixedly connected to the surface of the base (1), the surface of the sliding column (906) is fixedly connected to the surface of the support plate (907), and the surface of the support plate (907) is tightly pressed against the surface of the slide box (18).

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