Aquilaria agallocha grafting device

Abstract

The utility model relates to the technical field of grafting devices, in particular to an aquilaria agallocha grafting device. Comprising a base, a first sliding hole, a second sliding hole, a third sliding hole and a fourth sliding hole which are perpendicular are formed in the base, a first containing table is slidably installed on the first sliding hole, a second containing table is slidably installed on the second sliding hole, a third containing table is slidably installed on the third sliding hole, and a fourth containing table is slidably installed on the fourth sliding hole; when the first placing table, the second placing table, the third placing table and the fourth placing table are located on the same straight line, a first cutting mechanism used for cutting stocks is installed between the first placing table and the second placing table, and a second cutting mechanism used for cutting scions is installed between the third placing table and the fourth placing table. By means of the structure, the stock or the scion does not need to be cut manually during cutting, and therefore the cutting quality of the stock and the scion is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grafting devices, in particular to a grafting device for Aquilaria sinensis (Lour.) Spreng. cv. Qinan. Background Technique

[0002] At present, most of the improved varieties of Aquilaria sinensis (Lour.) Spreng. cv. Qinan trees are obtained through grafting to obtain stable genetic genes. Through grafting, plants can bear fruit earlier, overcome the difficulties of some species that are not easy to reproduce, resist diseases and immunity, prevent insect pests. In addition, the wind and soil adaptability of the rootstock can be used to expand the cultivation area, increase the yield and quality.

[0003] In the prior art, the cutting of the rootstock and scion is often carried out manually, which makes the angle of the incision prone to deviation. In order to align the incisions, the connection between the rootstock and the scion is prone to shift, or the contact at the incision is poor, thus affecting the growth of Aquilaria sinensis (Lour.) Spreng. cv. Qinan after grafting. Content of the Utility Model

[0004] Aiming at the above problems, the utility model provides a grafting device for Aquilaria sinensis (Lour.) Spreng. cv. Qinan to solve the problem that the angle of the incision is prone to deviation during manual cutting in the prior art, thus affecting the growth of Aquilaria sinensis (Lour.) Spreng. cv. Qinan after grafting.

[0005] The utility model is realized by the following technical scheme: A grafting device for Aquilaria sinensis (Lour.) Spreng. cv. Qinan, including a base, on which there are vertical first sliding holes and second sliding holes, third sliding holes and fourth sliding holes. A first placement table is slidably installed on the first sliding hole, a second placement table is slidably installed on the second sliding hole, a third placement table is slidably installed on the third sliding hole, and a fourth placement table is slidably installed on the fourth sliding hole; the first placement table and the second placement table are used to install the rootstock, and the third placement table and the fourth placement table are used to install the scion. When the first placement table, the second placement table, the third placement table and the fourth placement table are on a straight line, a first cutting mechanism for cutting the rootstock is installed between the first placement table and the second placement table, and a second cutting mechanism for cutting the scion is installed between the third placement table and the fourth placement table.

[0006] Through the above structure, it is not necessary to cut the rootstock or scion manually, thereby improving the quality of the incisions of the rootstock and scion and preventing the incisions from being contaminated, thus improving the overall grafting quality. Only need to place the rootstock on the first placement table and the second placement table, place the scion on the third placement table and the fourth placement table, then cut them through the cutting mechanism, and then connect the cut rootstock and scion with a grafting clip to achieve grafting.

[0007] Furthermore, the first cutting mechanism includes a support frame fixedly mounted on a base, a cylinder is fixedly mounted on the top of the support frame, and a cutter is fixedly connected to the output end of the cylinder through the support frame. The cutter can be used to cut the scion or the rootstock, and during installation, the angles of the cutter of the first cutting mechanism and the cutter of the second cutting mechanism need to be adjusted so that the angles of the two are the same.

[0008] Furthermore, a first cutting table is slidably mounted on the first slide hole, and a second cutting table having the same structure as the first cutting table is slidably mounted on the fourth slide hole. When the first placement table, the second placement table, the third placement table, and the fourth placement table are in a straight line, the first cutting table is located at the bottom of the first cutting mechanism, and the second cutting table is located at the bottom of the second cutting mechanism; the first cutting table includes a cutting seat for providing support for the cutting of the cutter, and the cutting seat is slidably matched with the first slide hole. Through the first cutting table and the second cutting table, the cutter can be made more stable during cutting, preventing the rootstock or scion from shaking up and down during cutting, and further improving the quality of cutting.

[0009] Furthermore, the first placement platform includes a first mounting frame slidably mounted on the first sliding hole, and two first clamping plates are slidably mounted on the first mounting frame; the second placement platform includes a second mounting frame slidably mounted on the second sliding hole, and two second clamping plates are slidably mounted on the second mounting frame. The second clamping plate can clamp both ends of the rootstock through the first clamping plate, and when the cutter cuts it, the part clamped by the second clamping plate can be removed.

[0010] Furthermore, the first mounting frame is fixedly mounted with a first mounting plate on both the front and rear sides, the first mounting plate is fixedly mounted with a first spring, and one end of the first spring away from the first mounting plate is fixedly connected to the first clamping plate; the second mounting frame is fixedly mounted with a second mounting plate on both the front and rear sides, the second mounting plate is fixedly mounted with a second spring, and one end of the second spring away from the second mounting plate is fixedly connected to the second clamping plate. By setting the first spring and the second spring, the first clamping plate and the second clamping plate can always fit the rootstock, thereby ensuring the stability of the rootstock during cutting, and further improving the quality of cutting.

[0011] Furthermore, a motor is fixedly installed inside the base, and the output end of the motor is connected to a drive shaft through a transmission mechanism, and the end of the drive shaft away from the motor is rotatably connected to the base, and the drive shaft includes a first threaded portion, a connecting portion, and a second threaded portion that are fixedly connected in sequence, the first threaded portion is threadedly matched with the first placement platform, the connecting portion is rotatably installed on the base, and the second threaded portion is threadedly matched with the fourth placement platform. The movement of the first placement platform and the fourth placement platform is controlled by one motor, so that the structure of the device is simpler.

[0012] Further, the transmission mechanism includes a first bevel gear fixedly connected coaxially with the output shaft of the motor. The first bevel gear meshes with a second bevel gear, and the second bevel gear is fixedly connected coaxially with the drive shaft. One end of the drive shaft close to the motor is rotatably connected to the base. The transmission is carried out by the first bevel gear and the second bevel gear, so that the selection of the installation position of the motor is more, and thus the installation of the motor is more convenient.

[0013] Further, a connecting plate is fixedly installed at the bottom of one end of the first mounting bracket close to the second mounting bracket. A first connecting rod is hinged on the connecting plate, and one end of the first connecting rod away from the connecting plate is hinged to the second mounting bracket. Through the arrangement of the first connecting rod, when the first mounting bracket moves left and right, it can also drive the second mounting bracket to move back and forth.

[0014] Further, a first magnet is fixedly installed on one side of the first mounting bracket close to the cutting seat, and a second magnet is fixedly installed on one side of the cutting seat close to the first mounting bracket. The first magnet and the second magnet attract each other; a stop block for blocking the cutting seat is also fixedly installed inside the base. Through the arrangement of the first magnet and the second magnet, when the first mounting bracket moves to the right, it can drive the cutting seat to move to the right together. When the first mounting bracket moves to the left to return to the initial position, due to the arrangement of the stop block, the first mounting bracket and the cutting seat can be separated.

[0015] Further, the first placing table and the fourth placing table, the second placing table and the third placing table, the first cutting table and the second cutting table, the first cutting mechanism and the second cutting mechanism, the first sliding hole and the fourth sliding hole, the second sliding hole and the third sliding hole, the first threaded part and the second threaded part are all centrosymmetric about the central axis of the base.

[0016] In summary, the beneficial effects of the present utility model are as follows:

[0017] 1. The rootstock placed on the first placing table and the second placing table is cut by the first cutting mechanism, and at the same time, the scion placed on the third placing table and the fourth placing table is cut by the second cutting mechanism. The whole cutting process is realized by controlling the machine, so that the cut surfaces of the rootstock and the scion are smoother. And by adjusting the angles of the cutters of the two cutting mechanisms, it can be ensured as much as possible that the two cut surfaces can be completely aligned, improving the quality of grafting and reducing the pollution of the cut surfaces.

[0018] 2. A motor drives a drive shaft to control the first placement table and the fourth placement table to move towards or away from each other, so that the cut rootstock and scion can approach each other for fixation. After grafting, the first placement table and the fourth placement table can synchronously retreat to their original positions. The movement of the first placement table and the fourth placement table can drive the movement of the second placement table and the third placement table, that is, a single motor drives the movement of four placement tables, making the structure of the device simpler and the coordination of the movement of the four placement tables better. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 It is a schematic diagram of the structure of the second state of the present utility model (scion and rootstock are matched);

[0021] Figure 3 It is a schematic diagram of the internal structure of the base;

[0022] Figure 4 It is a schematic diagram of the structure of the first placement table, the first cutting table and the second placement table.

[0023] In the figure: 1 - base; 11 - first sliding hole; 12 - second sliding hole; 13 - third sliding hole; 14 - fourth sliding hole; 15 - rootstock; 16 - scion;

[0024] 2 - first placement table; 21 - first mounting frame; 22 - first mounting plate; 23 - first spring; 24 - first clamping plate; 25 - first slider; 26 - first chute; 27 - first magnet; 28 - connecting plate;

[0025] 3 - first cutting mechanism; 31 - cylinder; 32 - cutter; 33 - support frame;

[0026] 4 - first cutting table; 41 - second magnet; 42 - cutting seat; 43 - stop block; 44 - avoidance groove;

[0027] 5 - second placement table; 51 - second mounting frame; 52 - second mounting plate; 53 - second spring; 54 - second clamping plate; 55 - second slider; 56 - second chute;

[0028] 6 - third placement table; 7 - second cutting table; 8 - second cutting mechanism; 9 - fourth placement table;

[0029] 101 - motor; 102 - first bevel gear; 103 - drive shaft; 104 - second bevel gear; 105 - first connecting rod; 106 - first threaded part; 107 - connecting part; 108 - bearing seat; 109 - second threaded part; 110 - second connecting rod. Detailed Implementation Modes

[0030] The following will further describe in detail the specific implementation manners of the present utility model in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0031] In the description of the present application, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0032] The following is a description of the preferred embodiments of the present utility model in conjunction with the accompanying drawings.

[0033] As Figure 1 、 Figure 2 shown, the agarwood grafting device provided by the present utility model includes a base 1. The base 1 is provided with a vertical first sliding hole 11 and a second sliding hole 12, a third sliding hole 13 and a fourth sliding hole 14. Among them, the first sliding hole 11 and the fourth sliding hole 14 are on a straight line, and the second sliding hole 12 is parallel to the third sliding hole 13 and has opposite directions. A first placing table 2 and a fourth placing table 9 that can slide left and right are respectively installed on the first sliding hole 11 and the fourth sliding hole 14, and a second placing table 5 and a third placing table 6 that can slide back and forth are respectively installed on the second sliding hole 12 and the third sliding hole 13. The first placing table 2 and the second placing table 5 are used to install the rootstock 15, and the third placing table 6 and the fourth placing table 9 are used to install the scion 16. In the initial state, that is, when the first placing table 2, the second placing table 5, the third placing table 6, and the fourth placing table 9 are on a straight line, a first cutting mechanism 3 for cutting the rootstock 15 is installed between the first placing table 2 and the second placing table 5, and a second cutting mechanism 8 for cutting the scion 16 is installed between the third placing table 6 and the fourth placing table 9.

[0034] The structures of the first cutting mechanism 3 and the second cutting mechanism 8 described above are the same. Taking the first cutting mechanism 3 as an example, the first cutting mechanism 3 includes a support frame 33 fixedly installed on the base 1. A cylinder 31 is fixedly installed at the top of the support frame 33, and the output end of the cylinder 31 passes through the support frame 33 and is fixedly connected to a cutter 32.

[0035] Taking the cutting of the stock 15 as an example, since the first placement table 2 and the second placement table 5 are used to fix both ends of the uncut stock 15, and the cutter 32 is located between them. At this time, when the cutter 32 cuts the stock 15, the stock 15 is in a suspended state, which will affect the cutting quality during cutting. Therefore, a first cutting table 4 is installed at the bottom of the first cutting mechanism 3. Similarly, a second cutting table 7 with the same structure as the first cutting table 4 is installed at the bottom of the second cutting mechanism 8. Taking the first cutting table 4 as an example, the first cutting table 4 includes a cutting seat 42 for providing support for the cutter 32 to cut, and the cutting seat 42 is slidably engaged with the first sliding hole 11.

[0036] As Figure 1 , Figure 4 shown, the first placement table 2 in this device is the same as the fourth placement table 9, the second placement table 5 is the same as the third placement table 6, and the first placement table 2 is longer than the second placement table 5. Because after the cutter 32 cuts, the remaining stock 15 on the first placement table 2 is longer, the first placement table 2 is lengthened, so that it can clamp more stock 15, and thus the stock 15 can be more stable when it moves.

[0037] Taking the structures of the first placement table 2 and the second placement table 5 as an example, the first placement table 2 includes a first mounting frame 21 slidably mounted on the first sliding hole 11, and two first clamping plates 24 are slidably mounted on the first mounting frame 21; specifically, a number of first sliding grooves 26 are provided on the upper surface of the first mounting frame 21, and first sliding blocks 25 are provided at the bottom of the first clamping plates 24 and are slidably engaged with the first sliding grooves. The second placement table 5 includes a second mounting frame 51 slidably mounted on the second sliding hole 12, and two second clamping plates 54 are slidably mounted on the second mounting frame 51; specifically, a number of second sliding grooves 56 are provided on the upper surface of the second mounting frame 51, and second sliding blocks 55 are provided at the bottom of the second clamping plates 54 and are slidably engaged with the second sliding grooves 56.

[0038] First mounting plates 22 are fixedly mounted on both the front and rear sides of the first mounting frame 21, first springs 23 are fixedly mounted on the first mounting plates 22, and one end of the first spring 23 away from the first mounting plate 22 is fixedly connected to the first clamping plate 24; second mounting plates 52 are fixedly mounted on both the front and rear sides of the second mounting frame 51, second springs 53 are fixedly mounted on the second mounting plates 52, and one end of the second spring 53 away from the second mounting plate 52 is fixedly connected to the second clamping plate 54.

[0039] Among them, the tops of the two first plywood 24 and the second plywood 54 are chamfered. Taking the first plywood 24 as an example, in the initial state, the two first plywood 24 are attached to each other under the action of the first spring 23, but due to the chamfering of the top, the tops of the two first plywood 24 are similar to the effect of flaring. When the rootstock 15 needs to be placed, it is only necessary to press the rootstock 15 downward from the flared position at the top between the two first plywood 24, and then under the action of the first spring 23, the two first plywood 24 will fix the rootstock 15.

[0040] like Figure 1 , Figure 3 As shown, a connecting plate 28 is fixedly installed at the bottom of the first mounting frame 21 near one end of the second mounting frame 51, a first connecting rod 105 is hinged on the connecting plate 28, and one end of the first connecting rod 105 away from the connecting plate 28 is hinged to the second mounting frame 51. Similarly, the third placement table 6 is also connected to the second placement table 5 through the second connecting rod 110. In this way, when the first placement table 2 and the fourth placement table 9 slide left and right, they can also drive the second placement table 5 and the third placement table 6 to slide forward and backward respectively.

[0041] like Figure 1 , Figure 3 As shown, a motor 101 is fixedly installed inside the base 1, and the output end of the motor 101 is connected to a driving shaft 103 through a transmission mechanism. The end of the driving shaft 103 away from the motor 101 is rotatably connected to the base 1. The driving shaft 103 includes a first threaded portion 106, a connecting portion 107, and a second threaded portion 109 which are fixedly connected in sequence. The first threaded portion 106 is threadedly matched with the first placement table 2, the connecting portion 107 is rotatably installed on the base 1 through a bearing seat 108, and the second threaded portion 109 is threadedly matched with the fourth placement table 9.

[0042] The transmission mechanism includes a first bevel gear 102 coaxially fixedly connected to the output shaft of the motor 101, the first bevel gear 102 is meshed with a second bevel gear 104, the second bevel gear 104 is coaxially fixedly connected to the drive shaft 103, and the end of the drive shaft 103 close to the motor 101 is rotatably connected to the base 1.

[0043] On one side of the first mounting bracket 21 close to the cutting base 42, a first magnet 27 is fixedly installed. On one side of the cutting base 42 close to the first mounting bracket 21, a second magnet 41 is fixedly installed. The first magnet 27 and the second magnet 41 attract each other. Inside the base 1, a stop block 43 for blocking the cutting base 42 is also fixedly installed. In the initial position, the cutting base 42 is approximately at the middle position of the first sliding hole 11. When the first mounting bracket 21 slides to the right, it will drive the cutting base 42 to slide to the right. When the first mounting bracket 21 slides to the left and returns to its original position, under the action of the first magnet 27 and the second magnet 41, the cutting base 42 will also slide to the right. The length of the cutting base 42 in the front-back direction at the bottom is greater than the length of the first mounting bracket 21 in the front-back direction, and the installation position of the stop block 43 will not affect the first mounting bracket 21 either. So when passing through the stop block 43, the first mounting bracket 21 will pass through the position of the stop block 43 and return to its original position, while the cutting base 42 will be blocked by the stop block 43, so that the cutting base 42 also stops at the bottom of the first cutting mechanism 3. Similarly, the second cutting mechanism 8 and the second cutting table 7 are also in this way. In addition, an avoidance groove 44 for cooperating with the connecting plate 28 is provided at the bottom of the cutting base 42.

[0044] The first placing table 2 and the fourth placing table 9, the second placing table 5 and the third placing table 6, the first cutting table 4 and the second cutting table 7, the first cutting mechanism 3 and the second cutting mechanism 8, the first sliding hole 11 and the fourth sliding hole 14, the second sliding hole 12 and the third sliding hole 13, the first thread part 106 and the second thread part 109, the first connecting rod 105 and the second connecting rod 110 mentioned above are all centrosymmetric about the central axis of the base 1.

[0045] The working principle of this device is as follows: First, place the rootstock 15 on the first placing table 2 and the second placing table 5, place the scion 16 on the third placing table 6 and the fourth placing table 9, and then start the first cutting mechanism 3 and the second cutting mechanism 8 to cut them. After cutting is completed, the cutter 32 retracts, start the motor 101. Under the action of the motor 101, the first placing table 2 and the fourth placing table 9 move towards each other until the scion 16 and the rootstock 15 are aligned. While the first placing table 2 and the fourth placing table 9 are moving, the second placing table 5 and the third placing table 6 will also move forward and backward respectively, so as not to affect the first placing table 2 and the fourth placing table 9. As Figure 2 shown, when the scion 16 and the rootstock 15 are aligned, remove the remaining rootstock 15 and scion 16 on the second placing table 5 and the third placing table 6, then clamp the incision with a grafting clip and remove the grafted Aquilaria seedlings from the first placing table 2 and the fourth placing table 9. Finally, control the motor 101 to reverse to make it return to the initial position to complete the grafting.

[0046] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present utility model.

Claims

1. An Aquilaria sinensis (Lour.) Spreng. grafting device, characterized in that It includes a base (1), on which there are vertical first sliding holes (11) and second sliding holes (12), third sliding holes (13) and fourth sliding holes (14). A first placing table (2) is slidably mounted on the first sliding hole (11), a second placing table (5) is slidably mounted on the second sliding hole (12), a third placing table (6) is slidably mounted on the third sliding hole (13), and a fourth placing table (9) is slidably mounted on the fourth sliding hole (14). The first placing table (2) and the second placing table (5) are used for mounting rootstocks (15), and the third placing table (6) and the fourth placing table (9) are used for mounting scions (16). When the first placing table (2), the second placing table (5), the third placing table (6), and the fourth placing table (9) are in a straight line, a first cutting mechanism (3) for cutting the rootstock (15) is installed between the first placing table (2) and the second placing table (5), and a second cutting mechanism (8) for cutting the scion (16) is installed between the third placing table (6) and the fourth placing table (9).

2. The Chénnān eaglewood grafting device according to claim 1, characterized in that The first cutting mechanism (3) includes a support frame (33) fixedly installed on the base (1). A cylinder (31) is fixedly installed at the top of the support frame (33), and the output end of the cylinder (31) passes through the support frame (33) and is fixedly connected to a cutter (32).

3. The Chénnān agarwood grafting device according to claim 2, wherein A first cutting table (4) is also slidably mounted on the first sliding hole (11), and a second cutting table (7) with the same structure as the first cutting table (4) is slidably mounted on the fourth sliding hole (14). When the first placing table (2), the second placing table (5), the third placing table (6), and the fourth placing table (9) are in a straight line, the first cutting table (4) is located at the bottom of the first cutting mechanism (3), and the second cutting table (7) is located at the bottom of the second cutting mechanism (8). The first cutting table (4) includes a cutting seat (42) for providing support for the cutter (32) to cut, and the cutting seat (42) is slidably matched with the first sliding hole (11).

4. The Chenxiang Aquilaria grafting device according to claim 3, characterized in that, The first placing table (2) includes a first mounting frame (21) slidably mounted on the first sliding hole (11), and two first clamping plates (24) are slidably mounted on the first mounting frame (21). The second placing table (5) includes a second mounting frame (51) slidably mounted on the second sliding hole (12), and two second clamping plates (54) are slidably mounted on the second mounting frame (51).

5. The Chenxiang aquilaria grafting device according to claim 4, characterized in that, First mounting plates (22) are fixedly installed on both the front and rear sides of the first mounting frame (21), and first springs (23) are fixedly installed on the first mounting plates (22). The ends of the first springs (23) far from the first mounting plates (22) are fixedly connected to the first clamping plates (24). Second mounting plates (52) are fixedly installed on both the front and rear sides of the second mounting frame (51), and second springs (53) are fixedly installed on the second mounting plates (52). The ends of the second springs (53) far from the second mounting plates (52) are fixedly connected to the second clamping plates (54).

6. The Chénnān agarwood grafting device according to claim 5, wherein, A motor (101) is fixedly installed inside the base (1). The output end of the motor (101) is drivingly connected to a drive shaft (103) through a transmission mechanism. One end of the drive shaft (103) away from the motor (101) is rotatably connected to the base (1). The drive shaft (103) includes a first threaded portion (106), a connecting portion (107), and a second threaded portion (109) fixedly connected in sequence. The first threaded portion (106) is in threaded cooperation with the first placement table (2). The connecting portion (107) is rotatably installed on the base (1). The second threaded portion (109) is in threaded cooperation with the fourth placement table (9).

7. The Chénnān Aquilaria grafting device according to claim 6, characterized in that, The transmission mechanism includes a first bevel gear (102) fixedly connected coaxially with the output shaft of the motor (101). The first bevel gear (102) meshes with a second bevel gear (104). The second bevel gear (104) is fixedly connected coaxially with the drive shaft (103). One end of the drive shaft (103) close to the motor (101) is rotatably connected to the base (1).

8. The Chénnān agarwood grafting device according to claim 7, characterized in that, A connecting plate (28) is fixedly installed at the bottom of one end of the first mounting bracket (21) close to the second mounting bracket (51). A first connecting rod (105) is hinged on the connecting plate (28). One end of the first connecting rod (105) away from the connecting plate (28) is hinged to the second mounting bracket (51).

9. The Chénnān agarwood grafting device according to claim 8, wherein, A first magnet (27) is fixedly installed on one side of the first mounting bracket (21) close to the cutting seat (42). A second magnet (41) is fixedly installed on one side of the cutting seat (42) close to the first mounting bracket (21). The first magnet (27) and the second magnet (41) attract each other. A stop block (43) for blocking the cutting seat (42) is also fixedly installed inside the base (1).

10. The Aquilaria crassna grafting device according to claim 9, wherein, The first placement table (2) and the fourth placement table (9), the second placement table (5) and the third placement table (6), the first cutting table (4) and the second cutting table (7), the first cutting mechanism (3) and the second cutting mechanism (8), the first sliding hole (11) and the fourth sliding hole (14), the second sliding hole (12) and the third sliding hole (13), the first threaded portion (106) and the second threaded portion (109) are all centrosymmetric about the central axis of the base (1).

Images