Code spraying device with adjustable position

Abstract

The utility model discloses a position-adjustable code spraying device. The position-adjustable code spraying device comprises a mounting frame, an arc-shaped guide rail, an adjusting frame, a code spraying component and a position adjusting mechanism, wherein the arc-shaped guide rail is connected to the mounting frame, the code spraying component is directly or indirectly connected to the adjusting frame, and the adjusting frame is connected to the arc-shaped guide rail in a sliding mode. The adjusting frame is provided with a first working position enabling the code spraying direction of the code spraying component to be vertically downward and a second working position enabling the code spraying direction of the code spraying component to be in the horizontal direction in the process of sliding along the arc-shaped guide rail, and the mounting frame is connected to the position adjusting mechanism. The position adjusting mechanism is used for driving the mounting frame to move in the X direction, the Y direction and the Z direction so as to drive the code spraying component to move in place in the X direction, the Y direction and the Z direction. The code spraying device can be adjusted to spray codes on the top of a product and can also be adjusted to spray codes on the side face of the product, and the use requirement for spraying codes on the side face of the product can be met.

Description

Technical Field

[0001] The utility model relates to a position-adjustable coding device. Background Art

[0002] At present, inkjet printers are devices used to print information such as production date, expiration date and batch number on the surface of products. Inkjet printers are widely used in various industries. For example, a portable inkjet printer is disclosed in the Chinese patent with publication number CN220390745U. However, most existing inkjet printers can only print on the top of the product but not on the side of the product, so they cannot meet the demand for printing on the side of the product. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a position-adjustable inkjet coding device, which can be adjusted to inkjet the top of the product or to inkjet the side of the product, thereby meeting the use requirements of inkjet coding on the side of the product.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a position-adjustable inkjet device, which includes a mounting frame, an arc-shaped guide rail, an adjustment frame, an inkjet component and a position adjustment mechanism;

[0005] The arc-shaped guide rail is connected to the mounting frame;

[0006] The coding component is directly or indirectly connected to the adjustment frame;

[0007] The adjusting frame is slidably connected to the arc-shaped guide rail, and in the process of sliding along the arc-shaped guide rail, the adjusting frame has a first working position in which the coding direction of the coding component is vertically downward, and a second working position in which the coding direction of the coding component is horizontal;

[0008] The mounting frame is connected to the position adjustment mechanism, and the position adjustment mechanism is used to drive the mounting frame to move along the X direction, the Y direction and the Z direction, and then drive the coding component to move into position along the X direction, the Y direction and the Z direction.

[0009] Further, the coding component is connected to the adjustment frame through an angle adjustment mechanism; wherein the angle adjustment mechanism includes a rotating seat and a rotating drive mechanism;

[0010] The coding component is connected to the rotating seat;

[0011] The rotating seat is rotatably connected to the adjusting frame, and the rotating axis of the rotating seat relative to the adjusting frame is parallel to the coding direction of the coding component;

[0012] The rotary drive mechanism is connected to the adjustment frame, connected to the rotating seat and used for driving the rotating seat to rotate relative to the adjustment frame.

[0013] Further providing a specific structure of the rotary drive mechanism, the rotary drive mechanism comprises a worm wheel, a worm and a screw cap;

[0014] The worm gear is connected to the rotating seat;

[0015] The worm is rotatably connected to the adjustment frame and meshes with the worm wheel;

[0016] The screw cap is connected to the worm.

[0017] Furthermore, the position-adjustable inkjet printer device further includes a first limit block and a second limit block;

[0018] The first limiting block is connected to the mounting frame and is used to abut against the adjusting frame to position the adjusting frame when the adjusting frame slides to the first working position;

[0019] The second limiting block is connected to the mounting frame and is used to abut against the adjusting frame to position the adjusting frame when the adjusting frame slides to the second working position.

[0020] In order to further lock the position of the adjusting frame, the position-adjustable inkjet device also includes a locking bolt threadedly connected to the adjusting frame, and the locking bolt is used to tighten the mounting frame to lock the position of the adjusting frame when the adjusting frame slides into place along the arc guide rail.

[0021] In order to further drive the adjustment frame to slide along the arc-shaped guide rail, the position-adjustable inkjet printer device further includes an adjustment drive mechanism for driving the adjustment frame to move between the first working position and the second working position;

[0022] The adjustment drive mechanism comprises an arc-shaped gear ring, a gear and a handle;

[0023] The arc-shaped gear ring is connected to the mounting frame, and the central axis of the arc-shaped gear ring coincides with the central axis of the arc-shaped guide rail;

[0024] The gear is rotatably connected to the adjustment frame, and the gear is meshed with the arc-shaped gear ring;

[0025] The handle is connected to the gear.

[0026] Furthermore, the mounting frame has a concave arc portion, and the arc gear ring is connected to the concave arc portion;

[0027] The adjustment frame includes a main frame body and a sub-frame body;

[0028] The main frame is slidably connected to the arc-shaped guide rail;

[0029] The auxiliary frame is connected to the main frame, and a spacing groove is provided between the main frame and the auxiliary frame;

[0030] The gear is rotatably connected to the main frame and the auxiliary frame and is located in the spacing groove;

[0031] The concave arc portion and the arc-shaped gear ring both pass through the spacing groove.

[0032] A specific structure of the position adjustment mechanism is further provided, the position adjustment mechanism comprising a base, a first slide, a second slide, a third slide, a first drive assembly, a second drive assembly and a third drive assembly;

[0033] The first slide is slidably connected to the base along the X direction;

[0034] The first driving assembly is connected to the base, connected to the first slide and used to drive the first slide to slide into place along the X direction;

[0035] The second slide is slidably connected to the first slide along the Y direction;

[0036] The second driving assembly is connected to the first slide, connected to the second slide and used to drive the second slide to slide into position along the Y direction;

[0037] The third slide is slidably connected to the second slide along the Z direction;

[0038] The third driving assembly is connected to the second slide, connected to the third slide and used to drive the third slide to slide into position along the Z direction;

[0039] The mounting frame is connected to the third sliding seat.

[0040] Further, the first driving assembly includes a first screw rod, a first nut and a first hand wheel;

[0041] The first screw rod is rotatably connected to the base;

[0042] The first nut is connected to the first slide seat and is cooperatively connected to the first screw rod;

[0043] The first hand wheel is connected to the first screw rod, and the first hand wheel is used to drive the first screw rod to rotate and then drive the first nut and the first slide seat to slide into place along the X direction;

[0044] The second driving assembly includes a second screw rod, a second nut and a second hand wheel;

[0045] The second screw rod is rotatably connected to the first slide seat;

[0046] The second nut is connected to the second slide seat and is cooperatively connected to the second screw rod;

[0047] The second hand wheel is connected to the second screw rod, and the second hand wheel is used to drive the second screw rod to rotate and then drive the second nut and the second slide seat to slide into place along the Y direction;

[0048] The third driving assembly includes a third screw rod, a third nut and a third hand wheel;

[0049] The third screw rod is rotatably connected to the second slide seat;

[0050] The third nut is connected to the third slide seat and is cooperatively connected to the third screw rod;

[0051] The third hand wheel is connected to the third screw rod, and the third hand wheel is used to drive the third screw rod to rotate and then drive the third nut and the third slide seat to slide into place along the Z direction.

[0052] After adopting the above technical solution, when it is necessary to spray code on the top of the product, the adjustment frame is slid to the first working position along the arc guide rail, at which time the coding direction of the coding component is vertically downward, and then the mounting frame is driven to move along the X, Y and Z directions by the position adjustment mechanism, thereby driving the coding component to move above the product moving path, and then the coding component can be used to spray code on the top of the product during the product is transported. When it is necessary to spray code on the side of the product, the adjustment frame is slid to the second working position along the arc guide rail, at which time the coding direction of the coding component is in the horizontal direction, and then the mounting frame is driven to move along the X, Y and Z directions by the position adjustment mechanism, thereby driving the coding component to move to one side of the product moving path, and then the coding component can be used to spray code on the side of the product during the product is transported. Therefore, in the embodiment of the present application, the coding component can be adjusted to spray code on the top of the product or on the side of the product, which can meet the use requirements of spraying code on the side of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a structural schematic diagram of the position-adjustable inkjet coding device of the utility model;

[0054] Figure 2 It is a front view of the position-adjustable inkjet coding device of the utility model;

[0055] Figure 3 It is a structural schematic diagram of one side of the inkjet coding actuator of the utility model;

[0056] Figure 4 It is an exploded view of the assembly of one side of the inkjet printer actuator of the utility model;

[0057] Figure 5 It is a structural schematic diagram of the other side of the inkjet printer actuator of the utility model;

[0058] Figure 6 It is an assembly exploded view of the other side of the inkjet printer actuator of the utility model. DETAILED DESCRIPTION

[0059] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0060] like Figures 1 to 6 As shown, a position-adjustable inkjet device comprises a mounting frame 1, an arc-shaped guide rail 2, an adjustment frame 3, an inkjet component 4 and a position adjustment mechanism 5;

[0061] The arc-shaped guide rail 2 is connected to the mounting frame 1;

[0062] The coding component 4 is directly or indirectly connected to the adjustment frame 3;

[0063] The adjusting frame 3 is slidably connected to the arc guide rail 2. When sliding along the arc guide rail 2, the adjusting frame 3 has a first working position in which the coding direction of the coding component 4 is vertically downward and a second working position in which the coding direction of the coding component 4 is horizontal.

[0064] The mounting frame 1 is connected to the position adjustment mechanism 5, and the position adjustment mechanism 5 is used to drive the mounting frame 1 to move along the X direction, the Y direction and the Z direction, thereby driving the coding component 4 to move into position along the X direction, the Y direction and the Z direction. Specifically, when it is necessary to code on the top of the product 6, the adjustment frame 3 is slid along the arc guide rail 2 to the position as shown in FIG. Figure 1 The first working position shown in the figure, at this time, the coding direction of the coding component 4 is vertically downward, and then the mounting frame 1 is driven by the position adjustment mechanism 5 to move in the X direction, the Y direction and the Z direction, thereby driving the coding component 4 to move above the moving path of the product 6, and then the coding component 4 can be used to code the top of the product 6 during the conveying process of the product 6. When it is necessary to code on the side of the product 6, the adjustment frame 3 is slid along the arc guide rail 2 to the position as shown in the figure. Figure 2The second working position shown, at this time, the coding direction of the coding component 4 is along the horizontal direction, and then the mounting frame 1 is driven to move along the X direction, the Y direction and the Z direction by the position adjustment mechanism 5, and then the coding component 4 is driven to move to one side of the moving path of the product 6, and then the coding component 4 can be used to spray the code on the side of the product 6 during the transportation of the product 6. Therefore, in this embodiment of the application, the coding component 4 can be adjusted to spray the code on the top of the product 6, and can also be adjusted to spray the code on the side of the product 6, which can meet the use requirements of spraying the code on the side of the product 6. In this embodiment, the specific structure of the coding component 4 is a prior art well known to those skilled in the art, and will not be described in detail in this embodiment. Among them, the mounting frame 1, the arc guide rail 2, the adjustment frame 3 and the coding component 4 constitute a coding actuator.

[0065] In this embodiment, the coding component 4 can be connected to the adjustment frame 3 through an angle adjustment mechanism; wherein the angle adjustment mechanism can include a rotating seat 7 and a rotating drive mechanism;

[0066] The coding component 4 is connected to the rotating seat 7;

[0067] The rotating seat 7 is rotatably connected to the adjusting frame 3, and the rotating axis of the rotating seat 7 relative to the adjusting frame 3 is parallel to the coding direction of the coding component 4;

[0068] The rotary drive mechanism is connected to the adjustment frame 3 and the rotating seat 7 and is used to drive the rotating seat 7 to rotate relative to the adjustment frame 3, thereby driving the coding component 4 to rotate so as to adjust the coding angle. Of course, in some embodiments, the coding component 4 can also be directly connected to the adjustment frame 3.

[0069] like Figures 1 to 6 As shown, the rotary drive mechanism may include a worm wheel 8, a worm 9 and a screw cap 10;

[0070] The worm gear 8 is connected to the rotating seat 7;

[0071] The worm 9 is rotatably connected to the adjustment frame 3 and meshes with the worm wheel 8;

[0072] The screw cap 10 is connected to the worm 9, so that when the screw cap 10 is rotated, the worm 9 can be driven to rotate, thereby driving the worm wheel 8 and the rotating seat 7 to rotate, and then driving the coding component 4 to rotate to adjust the coding angle; wherein, the worm wheel 8 and the worm 9 can achieve self-locking.

[0073] Specifically, the position-adjustable inkjet printer device may further include a first limit block and a second limit block;

[0074] The first limiting block is connected to the mounting frame 1 and is used to abut against the adjusting frame 3 to position the adjusting frame 3 when the adjusting frame 3 slides to the first working position;

[0075] The second limiting block is connected to the mounting frame 1 and is used to abut against the adjusting frame 3 to position the adjusting frame 3 when the adjusting frame 3 slides to the second working position.

[0076] like Figures 3 to 6 As shown, the position-adjustable inkjet device may further include a locking bolt 11 threadedly connected to the adjusting frame 3, and the locking bolt 11 is used to tighten the mounting frame 1 to lock the position of the adjusting frame 3 when the adjusting frame 3 slides into place along the arc guide rail 2.

[0077] like Figures 1 to 6 As shown, the position-adjustable inkjet printer device may further include an adjustment drive mechanism for driving the adjustment frame 3 to move between the first working position and the second working position;

[0078] The adjustment drive mechanism may include an arc-shaped gear ring 12, a gear 13 and a handle 14;

[0079] The arc-shaped gear ring 12 is connected to the mounting frame 1, and the central axis of the arc-shaped gear ring 12 coincides with the central axis of the arc-shaped guide rail 2;

[0080] The gear 13 is rotatably connected to the adjustment frame 3, and the gear 13 is meshed with the arc-shaped gear ring 12;

[0081] The handle 14 is connected to the gear 13 so that the gear 13 is rotated when the handle 14 is turned, and the adjustment frame 3 is driven to move between the first working position and the second working position along the arc guide rail 2 through the cooperation between the gear 13 and the arc gear ring 12.

[0082] like Figures 1 to 6 As shown, the mounting frame 1 may have a concave arc portion 15, and the arc gear ring 12 is connected to the concave arc portion 15;

[0083] The adjustment frame 3 may include a main frame body 16 and a sub-frame body 17;

[0084] The main frame 16 is slidably connected to the arc-shaped guide rail 2;

[0085] The auxiliary frame 17 is connected to the main frame 16, and a spacing groove 18 is provided between the main frame 16 and the auxiliary frame 17;

[0086] The gear 13 is rotatably connected to the main frame 16 and the auxiliary frame 17 and is located in the spacing groove 18;

[0087] The concave arc portion 15 and the arc-shaped gear ring 12 both pass through the spacing groove 18; in the present embodiment, the locking bolt 11 is threadedly connected to the sub-frame 17, the rotating seat 7 is rotationally connected to the main frame 16, and the worm 9 is rotationally connected to the main frame 16.

[0088] like Figure 1 , 2 As shown, the position adjustment mechanism 5 may include a base, a first slide 19, a second slide 20, a third slide 21, a first drive assembly 22, a second drive assembly 23 and a third drive assembly 24;

[0089] The first slide 19 is slidably connected to the base along the X direction;

[0090] The first driving assembly 22 is connected to the base, connected to the first slide 19 and used to drive the first slide 19 to slide into place along the X direction;

[0091] The second slide 20 is slidably connected to the first slide 19 along the Y direction;

[0092] The second driving assembly 23 is connected to the first slide 19 and the second slide 20 and is used to drive the second slide 20 to slide in the Y direction to a position;

[0093] The third slide 21 is slidably connected to the second slide 20 along the Z direction;

[0094] The third driving assembly 24 is connected to the second slide 20, connected to the third slide 21 and used to drive the third slide 21 to slide in the Z direction to a position;

[0095] The mounting frame 1 is connected to the third slide 21, so as to drive the mounting frame 1 to move along the X, Y and Z directions, and further drive the coding component 4 to move into place along the X, Y and Z directions.

[0096] Specifically, the first driving assembly 22 may include a first screw rod, a first nut and a first hand wheel;

[0097] The first screw rod is rotatably connected to the base;

[0098] The first nut is connected to the first slide seat 19 and is connected in cooperation with the first screw rod;

[0099] The first hand wheel is connected to the first screw rod, and the first hand wheel is used to drive the first screw rod to rotate and then drive the first nut and the first slide seat 19 to slide into place along the X direction;

[0100] The second driving assembly 23 may include a second screw rod, a second nut and a second hand wheel;

[0101] The second screw rod is rotatably connected to the first slide seat 19;

[0102] The second nut is connected to the second slide seat 20 and is cooperatively connected to the second screw rod;

[0103] The second hand wheel is connected to the second screw rod, and the second hand wheel is used to drive the second screw rod to rotate and then drive the second nut and the second slide seat 20 to slide into place along the Y direction;

[0104] The third driving assembly 24 may include a third screw rod, a third nut and a third hand wheel;

[0105] The third screw rod is rotatably connected to the second slide seat 20;

[0106] The third nut is connected to the third slide seat 21 and is cooperatively connected to the third screw rod;

[0107] The third hand wheel is connected to the third screw rod, and the third hand wheel is used to drive the third screw rod to rotate and then drive the third nut and the third slide seat 21 to slide into place along the Z direction.

[0108] In summary, when it is necessary to spray code on the top of the product 6, the adjustment frame 3 is slid to the first working position along the arc guide rail 2, at which time the coding direction of the coding component 4 is vertically downward, and then the mounting frame 1 is driven to move along the X direction, Y direction and Z direction by the position adjustment mechanism 5, thereby driving the coding component 4 to move above the moving path of the product 6, and then the coding component 4 can be sprayed on the top of the product 6 during the transportation of the product 6. When it is necessary to spray code on the side of the product 6, the adjustment frame 3 is slid to the second working position along the arc guide rail 2, at which time the coding direction of the coding component 4 is in the horizontal direction, and then the mounting frame 1 is driven to move along the X direction, Y direction and Z direction by the position adjustment mechanism 5, thereby driving the coding component 4 to move to one side of the moving path of the product 6, and then the coding component 4 can be sprayed on the side of the product 6 during the transportation of the product 6. Therefore, in the embodiment of the present application, the coding component 4 can be adjusted to code on the top of the product 6 or on the side of the product 6, which can meet the use requirements of coding on the side of the product 6.

[0109] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A position-adjustable inkjet device, characterized in that: It comprises a mounting frame (1), an arc-shaped guide rail (2), an adjustment frame (3), a coding component (4) and a position adjustment mechanism (5); The arc-shaped guide rail (2) is connected to the mounting frame (1); The coding component (4) is directly or indirectly connected to the adjustment frame (3); The adjusting frame (3) is slidably connected to the arc-shaped guide rail (2), and in the process of sliding along the arc-shaped guide rail (2), the adjusting frame (3) has a first working position in which the coding direction of the coding component (4) is vertically downward, and a second working position in which the coding direction of the coding component (4) is horizontal; The mounting frame (1) is connected to the position adjustment mechanism (5), and the position adjustment mechanism (5) is used to drive the mounting frame (1) to move along the X direction, the Y direction and the Z direction, thereby driving the coding component (4) to move into position along the X direction, the Y direction and the Z direction.

2. The position-adjustable inkjet printer according to claim 1, characterized in that: The coding component (4) is connected to the adjustment frame (3) via an angle adjustment mechanism; wherein the angle adjustment mechanism comprises a rotating seat (7) and a rotating drive mechanism; The coding component (4) is connected to the rotating seat (7); The rotating seat (7) is rotatably connected to the adjusting frame (3), and the rotating axis of the rotating seat (7) relative to the adjusting frame (3) is parallel to the coding direction of the coding component (4); The rotary drive mechanism is connected to the adjustment frame (3), connected to the rotary seat (7), and is used to drive the rotary seat (7) to rotate relative to the adjustment frame (3).

3. The position-adjustable inkjet printer according to claim 2, characterized in that: The rotary drive mechanism comprises a worm wheel (8), a worm (9) and a rotary cap (10); The worm wheel (8) is connected to the rotating seat (7); The worm (9) is rotatably connected to the adjustment frame (3) and meshes with the worm wheel (8); The screw cap (10) is connected to the worm (9).

4. The position-adjustable inkjet printer according to claim 1, characterized in that: Also includes a first limit block and a second limit block; The first limiting block is connected to the mounting frame (1) and is used to abut against the adjusting frame (3) to position the adjusting frame (3) when the adjusting frame (3) slides to the first working position; The second limiting block is connected to the mounting frame (1) and is used to abut against the adjusting frame (3) to position the adjusting frame (3) when the adjusting frame (3) slides to the second working position.

5. The position-adjustable inkjet printer according to claim 1, characterized in that: It also includes a locking bolt (11) threadedly connected to the adjustment frame (3), and the locking bolt (11) is used to press against the mounting frame (1) to lock the position of the adjustment frame (3) when the adjustment frame (3) slides into place along the arc-shaped guide rail (2).

6. The position-adjustable inkjet printer according to claim 1, characterized in that: It also includes an adjustment drive mechanism for driving the adjustment frame (3) to move between the first working position and the second working position; The adjustment drive mechanism comprises an arc-shaped gear ring (12), a gear (13) and a handle (14); The arc-shaped gear ring (12) is connected to the mounting frame (1), and the central axis of the arc-shaped gear ring (12) coincides with the central axis of the arc-shaped guide rail (2); The gear (13) is rotatably connected to the adjustment frame (3), and the gear (13) is meshed with the arc-shaped gear ring (12); The handle (14) is connected to the gear (13).

7. The position-adjustable inkjet printer according to claim 6, characterized in that: The mounting frame (1) has a concave arc-shaped portion (15), and the arc-shaped gear ring (12) is connected to the concave arc-shaped portion (15); The adjustment frame (3) comprises a main frame body (16) and a sub-frame body (17); The main frame (16) is slidably connected to the arc-shaped guide rail (2); The auxiliary frame (17) is connected to the main frame (16), and a spacing groove (18) is provided between the main frame (16) and the auxiliary frame (17); The gear (13) is rotatably connected to the main frame (16) and the auxiliary frame (17) and is located in the spacing groove (18); The concave arcuate portion (15) and the arcuate gear ring (12) both pass through the spacing groove (18).

8. The position-adjustable inkjet printer according to claim 1, characterized in that: The position adjustment mechanism (5) comprises a base, a first slide (19), a second slide (20), a third slide (21), a first drive assembly (22), a second drive assembly (23) and a third drive assembly (24); The first slide seat (19) is slidably connected to the base along the X direction; The first driving assembly (22) is connected to the base, connected to the first slide seat (19), and used to drive the first slide seat (19) to slide in the X direction to a position; The second slide seat (20) is slidably connected to the first slide seat (19) along the Y direction; The second driving assembly (23) is connected to the first slide (19), connected to the second slide (20), and used to drive the second slide (20) to slide in the Y direction to a position; The third slide seat (21) is slidably connected to the second slide seat (20) along the Z direction; The third driving assembly (24) is connected to the second slide (20), connected to the third slide (21), and used to drive the third slide (21) to slide in place along the Z direction; The mounting frame (1) is connected to the third sliding seat (21).

9. The position-adjustable inkjet printer according to claim 8, characterized in that: The first driving assembly (22) comprises a first screw rod, a first nut and a first hand wheel; The first screw rod is rotatably connected to the base; The first nut is connected to the first slide seat (19) and is cooperatively connected with the first screw rod; The first hand wheel is connected to the first screw rod, and the first hand wheel is used to drive the first screw rod to rotate and then drive the first nut and the first slide seat (19) to slide into place along the X direction; The second driving assembly (23) comprises a second screw rod, a second nut and a second hand wheel; The second screw rod is rotatably connected to the first slide seat (19); The second nut is connected to the second slide seat (20) and is cooperatively connected with the second screw rod; The second hand wheel is connected to the second screw rod, and the second hand wheel is used to drive the second screw rod to rotate and then drive the second nut and the second slide seat (20) to slide into place along the Y direction; The third driving assembly (24) comprises a third screw rod, a third nut and a third hand wheel; The third screw rod is rotatably connected to the second slide seat (20); The third nut is connected to the third sliding seat (21) and is cooperatively connected with the third screw rod; The third hand wheel is connected to the third screw rod, and the third hand wheel is used to drive the third screw rod to rotate and then drive the third nut and the third slide seat (21) to slide into place along the Z direction.

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