Punching machine for furniture hinge production

By designing an adjustment and clamping mechanism on a punch press used in furniture hinge production, and utilizing the meshing of motor-driven gears and bevel gears to achieve precise position and angle adjustment of hinge parts, the problem of low stamping efficiency in furniture hinges is solved, and production efficiency is improved.

CN223875874UActive Publication Date: 2026-02-06BAZHOU DUOSHANG FURNITURE CO LTD
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Patent Information

Application Number
CN202520193562.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-07
Publication Date
2026-02-06
Estimated Expiration
2035-02-07

AI Technical Summary

Technical Problem

Furniture hinges require drilling at multiple locations during the stamping process, resulting in low stamping efficiency.

Method used

The punch press design includes a worktable, a fixed frame, an adjustment frame, a position adjustment mechanism, an angle adjustment mechanism, and a clamping mechanism. The position and angle of the hinge parts are adjusted by the meshing of the motor-driven gears and bevel gears, and the hinge parts are fixed by the clamping mechanism to prevent position changes.

Benefits of technology

It improves the stamping efficiency of furniture hinges, ensures the stability of hinge parts during the stamping process, reduces the number of position adjustments, and improves production efficiency.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223875874U_ABST
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Abstract

The utility model relates to the technical field of punching machines, in particular to a punching machine for furniture hinge production, which comprises a workbench, a fixing frame, an adjusting frame, a position adjusting mechanism, an angle adjusting mechanism and a clamping mechanism. The fixing frame is fixedly arranged on the workbench, the punching head is arranged on one side of the fixing frame, the hydraulic rod is fixedly arranged between the punching head and the fixing frame, the adjusting frame is slidably arranged in the adjusting opening, and the position adjusting mechanism is arranged between the adjusting frame and the adjusting disc and used for driving the adjusting frame to move in the adjusting opening. And the angle adjusting mechanism is arranged between the workbench and the adjusting disc and used for adjusting the angle of the adjusting disc, the clamping mechanism is arranged on the adjusting frame and used for clamping and fixing the hinge part in the adjusting frame, and through the technical scheme, the problem that in the related technology, the furniture hinge stamping efficiency is low is solved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to punch press technical field, concretely relates to a furniture hinge production is with punch press. BACKGROUND

[0002] Punch press, it is a punch press. In the national production, the stamping process has the advantages such as saving material and energy, high efficiency, not high to the technical requirement of operator and making the product that mechanical processing cannot reach through various die applications, so its use is more and more extensive, and stamping production is mainly for sheet. Through die, can make blanking, punching, forming, drawing, finishing, fine punching, shaping, riveting and extrusion parts etc., and is widely used in various fields.

[0003] The furniture hinge in prior art is punched in the punching groove in the punching process, and the furniture hinge part can be limited by the cooperation of the punching groove and the hinge part in the punching process, however, the surface of the furniture hinge part generally needs to be punched at multiple positions, so the hinge part needs to be taken out from the punching groove and adjusted in position again in the punching process, and the punching efficiency is low. UTILITY MODEL CONTENTS

[0004] The utility model provides a furniture hinge production is with punch press, solved the problem of furniture hinge punching efficiency in relevant technology is low.

[0005] The technical scheme of the utility model is as follows: a furniture hinge production is with punch press, including work table, fixed frame, adjusting frame, position adjusting mechanism, angle adjusting mechanism and clamping mechanism, the work table is punched and is opened there, the work table is rotationally arranged with adjusting disc, the adjusting disc is opened with adjusting mouth, the fixed frame is fixedly arranged on the work table, one side of the fixed frame is provided with punch head, the punch head is fixedly arranged with hydraulic rod between the fixed frame, the adjusting frame is slidably arranged in the adjusting mouth, the position adjusting mechanism is arranged between the adjusting frame and the adjusting disc, for driving the adjusting frame moves in the adjusting mouth, the angle adjusting mechanism is arranged between the work table and the adjusting disc, for adjusting the angle of the adjusting disc, the clamping mechanism is arranged on the adjusting frame, for clamping and fixing the hinge part in the adjusting frame.

[0006] Preferably, the angle adjusting mechanism comprises:

[0007] Adjusting groove, the adjusting groove is opened on the work table;

[0008] Adjusting column, the adjusting column is fixedly arranged on the work table, and the adjusting column extends out of the work table through the groove bottom of the adjusting groove;

[0009] A first rotating mechanism is arranged in the adjusting groove and used to drive the adjusting column to rotate.

[0010] Further, the first rotating mechanism comprises:

[0011] A first tooth ring is fixedly arranged on the adjusting column;

[0012] A first gear is rotatably arranged on the bottom of the adjusting groove, and the first gear is engaged with the first tooth ring;

[0013] A first motor is fixedly arranged on the workbench, and an output end of the first motor is fixedly connected with the first gear.

[0014] Further, the position adjusting mechanism comprises:

[0015] A threaded pipe is fixedly arranged on the adjusting frame;

[0016] A threaded rod is rotatably arranged on the side wall of the adjusting opening, and the threaded rod is inserted into the threaded pipe through thread cooperation;

[0017] A second rotating mechanism is arranged in the adjusting disc and used to drive the threaded rod to rotate.

[0018] Further, the second rotating mechanism comprises:

[0019] A first cavity is formed in the adjusting disc, and a first bevel gear is rotatably arranged on the side wall of the first cavity, and the first bevel gear is fixedly connected with the threaded rod;

[0020] A second bevel gear is rotatably arranged on the inner bottom wall of the first cavity, and the second bevel gear is engaged with the first bevel gear;

[0021] A driving mechanism is arranged on the adjusting column and used to drive the second bevel gear to rotate.

[0022] On the basis of the above scheme, the driving mechanism comprises:

[0023] A second motor is fixedly arranged on the adjusting column;

[0024] A driving rod is fixedly arranged between the output end of the second motor and the second bevel gear.

[0025] On the basis of the above scheme, the clamping mechanism comprises:

[0026] Clamping grooves are arranged on the two inner walls of the adjusting frame, and clamping columns are rotatably arranged in the clamping grooves;

[0027] Clamping blocks are fixedly arranged on the side walls of the clamping columns;

[0028] A synchronous rotating mechanism is arranged on the adjusting frame and used for driving the two clamping columns to synchronously rotate.

[0029] On the basis of the above scheme, the synchronous rotating mechanism comprises:

[0030] A second cavity is arranged on one side of the clamping groove, and a third bevel gear is rotatably arranged on the side wall of the second cavity and fixedly connected with the clamping column;

[0031] A fourth bevel gear is rotatably arranged on the side wall of the second cavity and engaged with the third bevel gear;

[0032] A power input mechanism is arranged in the adjusting port and used for driving the two fourth bevel gears to synchronously rotate.

[0033] On the basis of the above scheme, the power input mechanism comprises:

[0034] A first driving port is arranged on the fourth bevel gear;

[0035] A second driving port is arranged on the adjusting frame and aligned with the first driving port;

[0036] A driving prism is rotatably arranged in the adjusting port, penetrates the first driving port and the second driving port, and is slidably connected with the side wall of the first driving port;

[0037] A power input assembly is arranged on the adjusting disc and used for driving the driving prism to rotate.

[0038] On the basis of the above scheme, the power input mechanism comprises:

[0039] A third cavity is arranged in the adjusting disc, a fifth bevel gear is rotatably arranged on the side wall of the third cavity, and the fifth bevel gear is fixedly connected with the driving prism;

[0040] A sixth bevel gear is rotatably arranged on the inner top wall of the third cavity and engaged with the fifth bevel gear;

[0041] A third motor is fixedly arranged on the adjusting disc, and a sixth bevel gear is fixedly connected to an output end of the third motor.

[0042] The working principle and beneficial effects of the utility model are as follows:

[0043] 1. In the utility model, the first motor drives the first gear to rotate, and the first gear drives the adjusting column and the adjusting disc to rotate through the meshing of the first gear and the first tooth ring, so that the position of the adjusting frame and the hinge part in the adjusting frame can be adjusted through the rotation of the adjusting disc, thereby achieving the adjustment of the stamping position.

[0044] 2. In the utility model, the second motor drives the driving rod and the second bevel gear to rotate, and the first bevel gear and the threaded rod are driven to rotate through the meshing of the second bevel gear and the first bevel gear, so that the adjusting frame and the hinge part can be further adjusted through the cooperation of the threaded rod and the threaded pipe, thereby facilitating the further adjustment of the stamping position.

[0045] 3. In the utility model, the third motor drives the sixth bevel gear to rotate, and the driving prism is driven to rotate through the meshing of the sixth bevel gear and the fifth bevel gear, and the fourth bevel gear is driven to rotate through the sliding cooperation of the driving prism and the first driving port, and the third bevel gear and the clamping column are driven to rotate through the meshing of the fourth bevel gear and the third bevel gear, thereby driving the clamping block to cooperate with the workbench to clamp the hinge part, and the hinge part is limited through the side wall of the adjusting frame, thereby avoiding the change of the position of the hinge part during stamping.

[0046] 4. In the utility model, the workbench, the fixing frame, the adjusting frame, the position adjusting mechanism, the angle adjusting mechanism and the clamping mechanism are arranged, the position of the hinge part can be adjusted through the work of the first motor and the second motor, and the hinge part can be clamped and fixed through the work of the third motor, thereby solving the problem of low stamping efficiency of the furniture hinge in the related art. BRIEF DESCRIPTION OF DRAWINGS

[0047] The utility model will be further described in detail in combination with the drawings and specific embodiments.

[0048] Figure 1 It is a structural schematic diagram of the utility model;

[0049] Figure 2 It is a sectional structure schematic diagram of the utility model;

[0050] Figure 3The utility model discloses position adjusting mechanism place sectional view structure schematic diagram.

[0051] Figure 4 The utility model discloses clamping mechanism place sectional view structure schematic diagram.

[0052] Figure 5 The utility model discloses Figure 4 The utility model discloses position adjusting mechanism place sectional view structure schematic diagram.

[0053] In the figure: 1, workbench, 2, punch, 3, adjusting disc, 4, fixed frame, 5, punch head, 6, hydraulic rod, 7, adjusting frame, 8, adjusting column, 9, first tooth ring, 10, first gear, 11, first motor, 12, threaded tube, 13, threaded rod, 14, first bevel gear, 15, second bevel gear, 16, second motor, 17, clamping column, 18, clamping block, 19, third bevel gear, 20, fourth bevel gear, 21, driving prism, 22, fifth bevel gear, 23, sixth bevel gear, 24, third motor. DETAILED DESCRIPTION

[0054] The technical scheme in the embodiments of the utility model will be apparently and completely described below in conjunction with the embodiments of the utility model, and apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative labor are all related to the range protected by the utility model.

[0055] As Figures 1-5 The utility model discloses a punch for furniture hinge production, including workbench 1, fixed frame 4, adjusting frame 7, position adjusting mechanism, angle adjusting mechanism and clamping mechanism, be provided with punch 2 on workbench 1, workbench 1 is rotationally arranged with adjusting disc 3, and adjusting disc 3 is provided with adjusting mouth, and fixed frame 4 is fixedly arranged on workbench 1, and fixed frame 4 one side is provided with punch head 5, and punch head 5 is fixedly arranged with hydraulic rod 6 between fixed frame 4, and adjusting frame 7 is slidably arranged in adjusting mouth, and position adjusting mechanism is arranged between adjusting frame 7 and adjusting disc 3, is used for driving adjusting frame 7 to move in adjusting mouth, and angle adjusting mechanism is arranged between workbench 1 and adjusting disc 3, is used for adjusting the angle of adjusting disc 3, and clamping mechanism is arranged on adjusting frame 7, is used for clamping and fixing the hinge parts in adjusting frame 7.

[0056] Refer to Figures 1-3, the angle adjusting mechanism comprises an adjusting groove, an adjusting column 8 and a first rotating mechanism, the adjusting groove is arranged on the workbench 1, the adjusting column 8 is fixedly arranged on the workbench 1, the adjusting column 8 extends out of the workbench 1 through the groove bottom of the adjusting groove, the first rotating mechanism is arranged in the adjusting groove and is used for driving the adjusting column 8 to rotate, the first rotating mechanism comprises a first tooth ring 9, a first gear 10 and a first motor 11, the first tooth ring 9 is fixedly arranged on the adjusting column 8, the first gear 10 is rotatably arranged on the groove bottom of the adjusting groove, the first gear 10 is engaged with the first tooth ring 9, the first motor 11 is fixedly arranged on the workbench 1, the output end of the first motor 11 is fixedly connected with the first gear 10, the first motor 11 can drive the first gear 10 to rotate through the work of the first motor 11, the adjusting column 8 and the adjusting disc 3 are driven to rotate through the engagement of the first gear 10 and the first tooth ring 9, the position of the adjusting frame 7 and the hinge parts in the adjusting frame 7 can be adjusted through the rotation of the adjusting disc 3, so that the position of the stamping is adjusted.

[0057] With reference to Figure 3 , the position adjusting mechanism comprises a threaded pipe 12, a threaded rod 13 and a second rotating mechanism, the threaded pipe 12 is fixedly arranged on the adjusting frame 7, the threaded rod 13 is rotatably arranged on the adjusting port sidewall, the threaded rod 13 is inserted into the threaded pipe 12 through threaded cooperation, the second rotating mechanism is arranged in the adjusting disc 3 and is used for driving the threaded rod 13 to rotate, the second rotating mechanism comprises a first cavity, a second bevel gear 15 and a driving mechanism, the first cavity is arranged on the adjusting disc 3, the first cavity sidewall is rotatably provided with a first bevel gear 14, the first bevel gear 14 is fixedly connected with the threaded rod 13, the second bevel gear 15 is rotatably arranged on the inner bottom wall of the first cavity, the second bevel gear 15 is engaged with the first bevel gear 14, the driving mechanism is arranged on the adjusting column 8 and is used for driving the second bevel gear 15 to rotate, the work of the second motor 16 can drive the driving rod and the second bevel gear 15 to rotate, the first bevel gear 14 and the threaded rod 13 can be driven to rotate through the engagement of the second bevel gear 15 and the first bevel gear 14, the adjusting frame 7 and the hinge parts can be further adjusted through the cooperation of the threaded rod 13 and the threaded pipe 12, so that the position of the stamping is further adjusted, the driving mechanism comprises a second motor 16 and a driving rod, the second motor 16 is fixedly arranged on the adjusting column 8, the driving rod is fixedly arranged between the output end of the second motor 16 and the second bevel gear 15, the work of the second motor 16 can drive the driving rod and the second bevel gear 15 to rotate, the first bevel gear 14 and the threaded rod 13 can be driven to rotate through the engagement of the second bevel gear 15 and the first bevel gear 14, the adjusting frame 7 and the hinge parts can be further adjusted through the cooperation of the threaded rod 13 and the threaded pipe 12, so that the position of the stamping is further adjusted.

[0058] With reference to Figure 4 andFigure 5 The clamping mechanism comprises a clamping groove, a clamping block 18 and a synchronous rotating mechanism. The two inner walls of the adjusting frame 7 are each provided with a clamping groove. A clamping column 17 is rotatably arranged in the clamping groove. The side wall of the clamping column 17 is fixedly provided with a clamping block 18. The synchronous rotating mechanism is arranged on the adjusting frame 7 and is used to drive the two clamping columns 17 to synchronously rotate. The synchronous rotating mechanism comprises a second cavity, a fourth bevel gear 20 and a power input mechanism. The second cavity is arranged on one side of the clamping groove. A third bevel gear 19 is rotatably arranged on the side wall of the second cavity. The third bevel gear 19 is fixedly connected with the clamping column 17. The fourth bevel gear 20 is rotatably arranged on the side wall of the second cavity. The fourth bevel gear 20 is in mesh with the third bevel gear 19. The power input mechanism is arranged in the adjusting port and is used to drive the two fourth bevel gears 20 to synchronously rotate. The power input mechanism comprises a first driving port, a second driving port, a driving prism 21 and a power input assembly. The first driving port is arranged on the fourth bevel gear 20. The second driving port is arranged on the adjusting frame 7. The second driving port is aligned with the first driving port. The driving prism 21 is rotatably arranged in the adjusting port. The driving prism 21 penetrates through the first driving port and the second driving port. The driving prism 21 is in sliding connection with the side wall of the first driving port. The power input assembly is arranged on the adjusting disc 3 and is used to drive the driving prism 21 to rotate. The power input mechanism comprises a third cavity, a sixth bevel gear 23 and a third motor 24. The third cavity is arranged in the adjusting disc 3. A fifth bevel gear 22 is rotatably arranged on the side wall of the third cavity. The fifth bevel gear 22 is fixedly connected with the driving prism 21. The sixth bevel gear 23 is rotatably arranged on the inner top wall of the third cavity. The sixth bevel gear 23 is in mesh with the fifth bevel gear 22. The third motor 24 is fixedly arranged on the adjusting disc 3. The output end of the third motor 24 is fixedly connected with the sixth bevel gear 23. The working of the third motor 24 can drive the sixth bevel gear 23 to rotate. At the same time, through the meshing of the sixth bevel gear 23 and the fifth bevel gear 22, the driving prism 21 can be driven to rotate. At the same time, through the sliding cooperation of the driving prism 21 and the first driving port, the fourth bevel gear 20 can be driven to rotate. Then, through the meshing of the fourth bevel gear 20 and the third bevel gear 19, the third bevel gear 19 and the clamping column 17 can be driven to rotate. Thus, the clamping block 18 can be driven to cooperate with the workbench 1 to clamp the hinge part. At the same time, through the side wall of the adjusting frame 7, the hinge part can be limited, so as to avoid the position change of the hinge part in the stamping process.

[0059] In the embodiment, in use, the operator places the hinge parts into the adjusting frame 7, then controls the first motor 11 to work, the working of the first motor 11 can drive the first gear 10 to rotate, and the first gear 10 drives the adjusting column 8 and the adjusting disc 3 to rotate through the meshing with the first gear ring 9, then the rotation of the adjusting disc 3 can adjust the position of the adjusting frame 7 and the hinge parts in the adjusting frame 7, so as to adjust the stamping position, then the operator controls the second motor 16 to work, the working of the second motor 16 can drive the driving rod and the second bevel gear 15 to rotate, and the first bevel gear 14 and the threaded rod 13 are driven to rotate through the meshing of the second bevel gear 15 and the first bevel gear 14, then the adjusting frame 7 and the hinge parts are further adjusted through the cooperation of the threaded rod 13 and the threaded pipe 12, so as to further adjust the stamping position, after the hinge parts are aligned with the stamping head 5, the operator controls the third motor 24 to work, the working of the third motor 24 can drive the sixth bevel gear 23 to rotate, and the driving prism 21 is driven to rotate through the meshing of the sixth bevel gear 23 and the fifth bevel gear 22, the fourth bevel gear 20 is driven to rotate through the sliding cooperation of the driving prism 21 and the first driving port, then the third bevel gear 19 and the clamping column 17 are driven to rotate through the meshing of the fourth bevel gear 20 and the third bevel gear 19, so as to drive the clamping block 18 to cooperate with the workbench 1 to clamp the hinge parts, and the hinge parts are limited through the side wall of the adjusting frame 7, so as to avoid the change of the position of the hinge parts in the stamping process, then the operator controls the hydraulic rod 6 to work, so as to drive the stamping head 5 to stamp the hinge parts through the working of the hydraulic rod 6.

[0060] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and 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 punch press for producing a furniture hinge, characterized in that, Include: Workbench (1), the workbench (1) is provided with a punching port (2), the workbench (1) is rotatably provided with an adjusting disc (3), the adjusting disc (3) is provided with an adjusting port; Fixed frame (4), the fixed frame (4) is fixedly arranged on the workbench (1), one side of the fixed frame (4) is provided with a punching head (5), the punching head (5) and the fixed frame (4) are fixedly provided with a hydraulic rod (6); Adjusting frame (7), the adjusting frame (7) is slidably arranged in the adjusting port; Position adjusting mechanism, the position adjusting mechanism is arranged between the adjusting frame (7) and the adjusting disc (3), for driving the adjusting frame (7) to move in the adjusting port; Angle adjusting mechanism, the angle adjusting mechanism is arranged between the workbench (1) and the adjusting disc (3), for adjusting the angle of the adjusting disc (3); Clamping mechanism, the clamping mechanism is arranged on the adjusting frame (7), for clamping and fixing the hinge parts in the adjusting frame (7).

2. The furniture hinge production press according to claim 1, wherein The angle adjusting mechanism comprises: Adjusting groove, the adjusting groove is arranged on the workbench (1); Adjusting column (8), the adjusting column (8) is fixedly arranged on the workbench (1), the adjusting column (8) penetrates the groove bottom of the adjusting groove and extends out of the workbench (1); First rotating mechanism, the first rotating mechanism is arranged in the adjusting groove, for driving the adjusting column (8) to rotate.

3. The furniture hinge production press according to claim 2, wherein The first rotating mechanism comprises: First gear ring (9), the first gear ring (9) is fixedly arranged on the adjusting column (8); First gear (10), the first gear (10) is rotatably arranged on the groove bottom of the adjusting groove, the first gear (10) is engaged with the first gear ring (9); First motor (11), the first motor (11) is fixedly arranged on the workbench (1), and the output end of the first motor (11) is fixedly connected with the first gear (10).

4. The furniture hinge production press according to claim 3, wherein The position adjusting mechanism comprises: Screw pipe (12), the screw pipe (12) is fixedly arranged on the adjusting frame (7); Screw rod (13), the screw rod (13) is rotatably arranged on the adjusting port side wall, and the screw rod (13) extends into the screw pipe (12) through thread cooperation; Second rotating mechanism, the second rotating mechanism is arranged in the adjusting disc (3), for driving the screw rod (13) to rotate.

5. The furniture hinge production press according to claim 4, wherein The second rotating mechanism comprises: First cavity, the first cavity is arranged on the adjusting disc (3), the first cavity side wall is rotatably provided with a first bevel gear (14), and the first bevel gear (14) is fixedly connected with the screw rod (13); Second bevel gear (15), the second bevel gear (15) is rotatably arranged on the inner bottom wall of the first cavity, and the second bevel gear (15) is engaged with the first bevel gear (14); Driving mechanism, the driving mechanism is arranged on the adjusting column (8), for driving the second bevel gear (15) to rotate.

6. The furniture hinge production press according to claim 5, wherein The driving mechanism comprises: A second motor (16) is fixedly arranged on the adjusting column (8); A driving rod is fixedly arranged between the output end of the second motor (16) and the second bevel gear (15).

7. The furniture hinge production press according to claim 6, wherein The clamping mechanism comprises: A clamping groove is arranged on each of the two opposite inner walls of the adjusting frame (7), and a clamping column (17) is rotatably arranged in the clamping groove; A clamping block (18) is fixedly arranged on the side wall of the clamping column (17); A synchronous rotating mechanism is arranged on the adjusting frame (7) and used for driving the two clamping columns (17) to synchronously rotate.

8. The furniture hinge production press according to claim 7, wherein The synchronous rotating mechanism comprises: A second cavity is arranged on one side of the clamping groove, a third bevel gear (19) is rotatably arranged on the side wall of the second cavity, and the third bevel gear (19) is fixedly connected with the clamping column (17); A fourth bevel gear (20) is rotatably arranged on the side wall of the second cavity, and the fourth bevel gear (20) is engaged with the third bevel gear (19); A power input mechanism is arranged in the adjusting port and used for driving the two fourth bevel gears (20) to synchronously rotate.

9. The furniture hinge production press according to claim 8, wherein The power input mechanism comprises: A first driving port is arranged on the fourth bevel gear (20); A second driving port is arranged on the adjusting frame (7), and the second driving port is aligned with the first driving port; A driving prism (21) is rotatably arranged in the adjusting port, penetrates the first driving port and the second driving port, and is in sliding connection with the side wall of the first driving port; A power input assembly is arranged on the adjusting disc (3) and used for driving the driving prism (21) to rotate.

10. The furniture hinge production press according to claim 9, wherein The power input mechanism comprises: A third cavity is arranged in the adjusting disc (3), a fifth bevel gear (22) is rotatably arranged on the side wall of the third cavity, and the fifth bevel gear (22) is fixedly connected with the driving prism (21); A sixth bevel gear (23) is rotatably arranged on the inner top wall of the third cavity, and the sixth bevel gear (23) is engaged with the fifth bevel gear (22); A third motor (24) is fixedly arranged on the adjusting disc (3), and the output end of the third motor (24) is fixedly connected with the sixth bevel gear (23).