Pit digging and sowing device for pseudo-ginseng planting

Abstract

The pit digging and sowing device comprises a push frame, the top of the inner wall of the push frame is connected with a lifting assembly through a bolt, the interior of the lifting assembly is rotationally connected with a mounting roller, and a plurality of soil shoveling assemblies and a plurality of clamping assemblies are movably inserted into the mounting roller in the circumferential direction; each clamping assembly is correspondingly arranged on one side of the corresponding soil shoveling assembly and used for clamping and limiting the soil shoveling assemblies, the multiple locking assemblies are evenly and movably arranged on the mounting roller, and each locking assembly is correspondingly arranged on one side of the corresponding clamping assembly; according to the scheme, the lifting assembly is started to drive the soil shoveling assembly to move downwards to be inserted into the land through the mounting roller, the land can be subjected to pit digging treatment by pushing the pushing frame to move by a person, the person can adjust the position of the clamping assembly through the locking assembly, and when the clamping assembly moves towards the side away from the soil shoveling assembly, the clamping assembly can be separated from the clamping part of the soil shoveling assembly; and therefore, the soil shoveling assembly can be conveniently disassembled and replaced by personnel.

Description

Technical Field

[0001] The present application relates to the technical field of Panax notoginseng cultivation, and particularly relates to a pit-digging and sowing device for Panax notoginseng cultivation. Background Art

[0002] Also known as Tianqi and Sanshenqi, it is a plant of the genus Panax in the Araliaceae family. The roots and rhizomes of Panax notoginseng are the main medicinal parts, which are widely used in traditional Chinese medicine and have the effects of stopping bleeding, dispersing stasis, reducing swelling, and relieving pain. And Panax notoginseng contains various active ingredients such as notoginsenosides, flavonoids, and volatile oils, and has various pharmacological effects such as anti-inflammatory, anti-tumor, lipid-lowering, and immune-enhancing. In order to meet the market demand for Panax notoginseng, it is necessary to specifically cultivate Panax notoginseng on a large scale. When planting, it is necessary to dig pits on the land. In order to reduce the labor intensity of the planters, a pit-digging and sowing device for Panax notoginseng cultivation is required.

[0003] In the related art, when cultivating Panax notoginseng, pit-digging and sowing are mainly carried out through a pit-digging and sowing device. When in use, the planter pushes the pit-digging and sowing device to move. When the pit-digging and sowing device moves, several soil-shoveling blocks installed on the rotating roller are controlled to rotate, and thus the pit-digging operation can be carried out. However, since the soil-shoveling blocks may be deformed after long-term use, it is necessary for personnel to regularly repair or replace the soil-shoveling blocks. However, the soil-shoveling blocks and the rotating roller are generally connected by welding, which may cause inconvenience for personnel to replace the soil-shoveling blocks and is not conducive to actual use.

[0004] Therefore, the technical personnel in this field provide a pit-digging and sowing device for Panax notoginseng cultivation to solve the problems raised in the above background art. Utility Model Content

[0005] In order to solve the problem that the soil-shoveling blocks and the rotating roller are generally connected by welding in the above background art, which may cause inconvenience for personnel to replace the soil-shoveling blocks, the present application provides a pit-digging and sowing device for Panax notoginseng cultivation.

[0006] The pit-digging and sowing device for Panax notoginseng cultivation provided by the present application adopts the following technical solutions:

[0007] A pit-digging and sowing device for Panax notoginseng cultivation includes a pushing frame. The top of the inner wall of the pushing frame is connected by bolts with a lifting assembly. An installation roller is rotatably connected inside the lifting assembly. Several soil-shoveling assemblies are circumferentially and movably inserted on the installation roller. A plurality of clamping assemblies, each clamping assembly is correspondingly arranged on one side of each soil-shoveling assembly for clamping and limiting the soil-shoveling assembly. A plurality of locking assemblies are evenly movably arranged on the installation roller, and each locking assembly is correspondingly arranged on one side of each clamping assembly for adjusting the position of the clamping assembly.

[0008] By adopting the above technical solution, when the lifting component is started, the soil shoveling component can be driven by the installation roller to move downward and insert into the soil. By pushing the push frame to move, the soil can be dug. The position of the clamping component can be adjusted by the operator through the locking component. When the clamping component moves towards one side of the soil shoveling component, it can be clamped with the soil shoveling component, restricting the position between the soil shoveling component and the installation roller. When the clamping component moves towards the side away from the soil shoveling component, it can be separated from the clamping part of the soil shoveling component, so that it is convenient for the operator to disassemble and replace the soil shoveling component.

[0009] Preferably, the lifting component includes a driving member and a movable member. The driving member is fixed to the top of the inner wall of the push frame. The upper surface of the movable member is connected to the output end of the driving member. The installation roller is connected inside the movable member. The driving member drives the movable member to lift, so as to drive the installation roller to lift.

[0010] By adopting the above technical solution, when the hydraulic cylinder is started, the installation roller can be driven to move up and down through the U-shaped mounting bracket.

[0011] Preferably, a motor is connected to one side of the movable member by bolts, and the output end of the motor is fixedly connected to one end of the installation roller.

[0012] By adopting the above technical solution, starting the motor can drive the installation roller to rotate actively. By the rotation of the installation roller, several soil shoveling components can be driven to rotate.

[0013] Preferably, the installation roller includes a roller body rotatably connected inside the movable member. A plurality of installation grooves are circumferentially formed on the outer wall of the roller body. One ends of the plurality of soil shoveling components are respectively located inside the plurality of installation grooves. A plurality of storage grooves communicating with the plurality of installation grooves are uniformly formed inside the roller body. The clamping component is located inside the storage groove. A plurality of threaded holes communicating with the plurality of storage grooves are uniformly formed inside the roller body. The locking component is located inside the threaded hole.

[0014] By adopting the above technical solution, the installation groove can limit the installation position of the soil shoveling component, the storage groove can limit the installation position of the clamping component, and the threaded hole can limit the installation position of the locking component.

[0015] Preferably, the soil shoveling component includes a shovel head. One side of the shovel head is connected with an installation insert bar. The end of the installation insert bar away from the shovel head is located inside the installation groove. A clamping groove is formed on the outer wall of the installation insert bar. One end of the clamping component is located inside the clamping groove.

[0016] By adopting the above technical solution, inserting the installation insert into the interior of the installation groove can install the shovel head. When one end of the clamping component is located inside the clamping groove, the installation position of the installation insert can be restricted.

[0017] Preferably, the clamping component includes a rectangular clamping strip located inside the placement groove. One end of the rectangular clamping strip is located inside the clamping groove. One end of the rectangular clamping strip away from the clamping groove is elastically connected with a tension spring. The end of the tension spring away from the rectangular clamping strip is elastically connected with the inner wall of the roller body. An adjustment groove is formed on one side of the rectangular clamping strip close to the locking component. One end of the locking component is located inside the adjustment groove.

[0018] By adopting the above technical solution, when the operator controls one end of the locking component to be completely inserted into the interior of the adjustment groove, one end of the rectangular clamping strip can be located inside the clamping groove, thus restricting the position of the installation insert. Adjusting the locking component to the side away from the rectangular clamping strip, the rectangular clamping strip can be disengaged from the interior of the clamping groove under the tension of the tension spring, thereby facilitating the operator to disassemble the installation insert.

[0019] Preferably, the locking component includes an adjusting bolt threadedly connected inside the threaded hole. A connecting head is rotatably connected to the interior of one end of the adjusting bolt close to the rectangular clamping strip. One end of the connecting head away from the adjusting bolt is fixedly connected with a rectangular adjusting block. One end of the rectangular adjusting block away from the adjusting bolt is located inside the adjustment groove.

[0020] By adopting the above technical solution, turning the adjusting bolt can adjust the reciprocating movement of one side of the rectangular adjusting block inside the adjustment groove through the connecting head, and the position of the rectangular clamping strip can be adjusted through the movement of the rectangular adjusting block.

[0021] In summary, the present application includes the following beneficial technical effects:

[0022] 1. For the pit-digging and sowing device for Panax notoginseng planting, when the lifting component is started, the soil-shoveling component can be driven to move downward and insert into the soil through the installation roller. The operator can push the push frame to move to dig pits in the soil. The operator can adjust the position of the clamping component through the locking component. When the clamping component moves towards the soil-shoveling component, it can be mutually clamped with the soil-shoveling component, thereby restricting the connection between the soil-shoveling component and the installation roller. When the clamping component moves towards the side away from the soil-shoveling component, the clamping part with the soil-shoveling component can be separated, thus facilitating the operator to disassemble and replace the soil-shoveling component;

[0023] 2. When the hydraulic cylinder of this device for digging holes and sowing Panax notoginseng is started, it can drive the mounting roller to move up and down through the U-shaped mounting frame. Starting the motor can drive the mounting roller to rotate actively. Through the rotation of the mounting roller, several soil-shoveling components can be driven to rotate. The mounting groove can limit the mounting position of the soil-shoveling components, the storage groove can limit the mounting position of the clamping components, and the threaded hole can limit the mounting position of the locking components. At the same time, it is also convenient for personnel to adjust the locking components;

[0024] 3. For this device for digging holes and sowing Panax notoginseng, turning the set adjusting bolt can adjust one side of the rectangular adjusting block to move reciprocally inside the adjusting groove through the connecting head. By moving the rectangular adjusting block, the position of the rectangular clamping strip can be adjusted. When the inclined surface of the rectangular adjusting block is completely inserted into the adjusting groove, one end of the rectangular clamping strip can be located inside the clamping groove, thus restricting the position of the mounting insert. Adjusting the rectangular adjusting block to the side away from the rectangular clamping strip, the rectangular clamping strip can be disengaged from the clamping groove under the pulling force of the tension spring, so that it is convenient for personnel to disassemble the mounting insert. Description of the Drawings

[0025] Figure 1 is the overall structural schematic diagram of a device for digging holes and sowing Panax notoginseng in an embodiment of the present application;

[0026] Figure 2 is the cross-sectional structural schematic diagram of the mounting roller of a device for digging holes and sowing Panax notoginseng in an embodiment of the present application;

[0027] Figure 3 is a device for digging holes and sowing Panax notoginseng in an embodiment of the present application Figure 2 The enlarged schematic diagram of the structure at A;

[0028] Figure 4 is the enlarged schematic diagram of the structure in the state where the tension spring pulls back of a device for digging holes and sowing Panax notoginseng in an embodiment of the present application;

[0029] Figure 5 is the structural schematic diagram of the lifting component of a device for digging holes and sowing Panax notoginseng in an embodiment of the present application.

[0030] Description of the reference numerals: 1. Pushing frame; 2. Lifting component; 201. Driving part; 202. Moving part; 3. Mounting roller; 301. Roller body; 302. Mounting groove; 303. Storage groove; 304. Threaded hole; 4. Soil-shoveling component; 401. Shovel head; 402. Mounting insert; 403. Clamping groove; 5. Clamping component; 501. Rectangular clamping strip; 502. Tension spring; 503. Adjusting groove; 6. Locking component; 601. Adjusting bolt; 602. Connecting head; 603. Rectangular adjusting block; 7. Motor. Detailed Embodiment

[0031] The following will further elaborate on this application in conjunction with the accompanying Figures 1-5 drawings for a more detailed description.

[0032] An embodiment of this application discloses a device for digging holes and sowing seeds for Panax notoginseng cultivation. Referring to Figure 1 、 Figure 2 and Figure 3 , a device for digging holes and sowing seeds for Panax notoginseng cultivation includes a pushing frame 1. At the top of the inner wall of the pushing frame 1, a lifting component 2 is connected by bolts. Inside the lifting component 2, a mounting roller 3 is rotatably connected. A plurality of soil-shoveling components 4 are circumferentially and movably inserted into the mounting roller 3. There are also a plurality of clamping components 5, and each clamping component 5 is correspondingly arranged on one side of each soil-shoveling component 4 for clamping and limiting the soil-shoveling component 4. A plurality of locking components 6 are evenly and movably arranged on the mounting roller 3, and each locking component 6 is correspondingly arranged on one side of each clamping component 5 for adjusting the position of the clamping component 5.

[0033] In this embodiment, the pushing frame 1 provided in the device for digging holes and sowing seeds for Panax notoginseng cultivation facilitates the user to push and move this application. The pushing frame 1 is mainly composed of a support frame and rollers. The rollers used are anti-slip walking wheels for the soil and can be easily cleaned after being contaminated with mud. At the top of the inner wall of the pushing frame 1, a lifting component 2 is connected by bolts. By setting the lifting component 2, the installation position of the mounting roller 3 can be restricted, and at the same time, when the lifting component 2 is activated, the mounting roller 3 can be adjusted to move up and down. When adjusting the mounting roller 3 to move upward, the soil-shoveling component 4 located below the mounting roller 3 can be moved away from the ground, which is convenient for the user to transfer this application. When adjusting the mounting roller 3 to move downward, the soil-shoveling component 4 located below the mounting roller 3 can be inserted into the soil, so that by the user pushing this application to move, the soil can be dug, which is convenient for the user to sow Panax notoginseng. Further, inside the mounting roller 3, there are a plurality of clamping components 5 respectively engaged with the plurality of soil-shoveling components 4, and a plurality of locking components 6 respectively abutted against the plurality of clamping components 5. The user can adjust the position of the clamping component 5 through the locking component 6. When the clamping component 5 moves towards one side of the soil-shoveling component 4, it can be mutually clamped with the soil-shoveling component 4, thereby restricting the connection between the soil-shoveling component 4 and the mounting roller 3 and enhancing the stability of the installation of the soil-shoveling component 4. When the clamping component 5 moves towards the side away from the soil-shoveling component 4, it can be separated from the clamping part of the soil-shoveling component 4, and the soil-shoveling component 4 and the mounting roller 3 are in an inserted connection, so that it is convenient for the user to disassemble and replace the soil-shoveling component 4, making this application more conducive to practical use.

[0034] In a further preferred embodiment of the present utility model, as shown in Figure 1 and Figure 5As shown, the lifting assembly 2 includes a driving member 201 and a movable member 202. The driving member 201 is fixed relative to the top inner wall of the pushing frame 1. The upper surface of the movable member 202 is connected to the output end of the driving member 201. The inside of the movable member 202 is connected to the mounting roller 3. The driving member 201 drives the movable member 202 to lift, so as to drive the mounting roller 3 to lift.

[0035] In this embodiment, the provided driving member 201 can be a hydraulic cylinder, a pneumatic cylinder, a motor cooperating with a tooth chain structure, etc. In this embodiment, it is preferably a hydraulic cylinder. The provided movable member 202 can be a U-shaped mounting plate. The mounting position of the mounting roller 3 can be restricted by the U-shaped mounting frame, and a fixed connection is provided between the output end of the hydraulic cylinder and the upper surface of the U-shaped mounting frame. Thus, when the hydraulic cylinder is started, the mounting roller 3 can be driven by the U-shaped mounting frame to perform lifting adjustment.

[0036] In a further preferred embodiment of the present utility model, as Figure 1 shown, one side of the movable member 202 is connected with a motor 7 by bolts. The output end of the motor 7 is fixedly connected to one end of the mounting roller 3.

[0037] In this embodiment, starting the motor 7 can drive the mounting roller 3 to rotate actively. By the rotation of the mounting roller 3, several soil shoveling assemblies 4 can be driven to rotate for digging holes, thereby enhancing the hole-digging efficiency when the present application is used.

[0038] In a further preferred embodiment of the present utility model, as Figure 2 、 Figure 3 and Figure 4 shown, the mounting roller 3 includes a roller body 301 rotatably connected inside the movable member 202. A plurality of mounting grooves 302 are circumferentially formed on the outer wall of the roller body 301. One ends of several soil shoveling assemblies 4 are respectively located inside the several mounting grooves 302. A plurality of storage grooves 303 respectively communicating with the several mounting grooves 302 are uniformly formed inside the roller body 301. The clamping assembly 5 is located inside the storage grooves 303. A plurality of threaded holes 304 respectively communicating with the several storage grooves 303 are uniformly formed inside the roller body 301. The locking assembly 6 is located inside the threaded holes 304.

[0039] In this embodiment, the installation position of the soil shoveling assembly 4 can be restricted by the provided mounting grooves 302, the installation position of the clamping assembly 5 can be restricted by the provided storage grooves 303, and the installation position of the locking assembly 6 can be restricted by the provided threaded holes 304. At the same time, it is also convenient for personnel to adjust the locking assembly 6.

[0040] In a further preferred embodiment of the present utility model, as Figure 2 、 Figure 3 and Figure 4As shown, the earth-shoveling assembly 4 includes a shovel head 401. One side of the shovel head 401 is connected with an installation insert bar 402. One end of the installation insert bar 402 away from the shovel head 401 is located inside the installation slot 302. A clamping slot 403 is formed on the outer wall of the installation insert bar 402. One end of the clamping component 5 is located inside the clamping slot 403.

[0041] In this embodiment, by inserting the installation insert bar 402 into the installation slot 302, the shovel head 401 can be installed. And the installation insert bar 402 can be a rectangular bar, which is convenient for installing the installation insert bar 402. The shovel head 401 can be used to dig pits in the land. When one end of the clamping component 5 is located inside the clamping slot 403, the installation position of the installation insert bar 402 can be restricted, thereby enhancing the stability of the shovel head 401 during use.

[0042] In a further preferred embodiment of the present utility model, as Figure 3 and Figure 4 shown, the clamping component 5 includes a rectangular clamping bar 501 located inside the storage slot 303. One end of the rectangular clamping bar 501 is located inside the clamping slot 403. One end of the rectangular clamping bar 501 away from the clamping slot 403 is elastically connected with a tension spring 502. One end of the tension spring 502 away from the rectangular clamping bar 501 is elastically connected with the inner wall of the roller body 301. An adjustment slot 503 is formed on one side of the rectangular clamping bar 501 close to the locking component 6. One end of the locking component 6 is located inside the adjustment slot 503.

[0043] In this embodiment, when the operator controls the locking component 6 to move towards one side of the rectangular clamping bar 501 and controls one end of the locking component 6 to be completely inserted into the adjustment slot 503, one end of the rectangular clamping bar 501 can be located inside the clamping slot 403, thus restricting the position of the installation insert bar 402. When the operator needs to disassemble the installation insert bar 402, the locking component 6 can be adjusted towards the side away from the rectangular clamping bar 501. At the same time, the rectangular clamping bar 501 can be disengaged from the inside of the clamping slot 403 under the pulling force of the tension spring 502, thereby facilitating the operator to disassemble the installation insert bar 402.

[0044] In a further preferred embodiment of the present utility model, as Figure 3 and Figure 4 shown, the locking component 6 includes an adjustment bolt 601 threadedly connected inside the threaded hole 304. A connecting head 602 is rotatably connected inside one end of the adjustment bolt 601 close to the rectangular clamping bar 501. One end of the connecting head 602 away from the adjustment bolt 601 is fixedly connected with a rectangular adjustment block 603. One end of the rectangular adjustment block 603 away from the adjustment bolt 601 is located inside the adjustment slot 503.

[0045] In this embodiment, when the user turns the adjusting bolt 601, the rectangular adjusting block 603 can be adjusted to reciprocate inside the adjusting groove 503 through the connecting head 602. One end of the rectangular adjusting block 603 away from the connecting head 602 is an inclined surface. Thus, by moving the rectangular adjusting block 603, the rectangular clamping strip 501 can be controlled to move along the inclined surface part, and the position of the rectangular clamping strip 501 can be adjusted. When the inclined surface part of the rectangular adjusting block 603 is completely inside the adjusting groove 503, the rectangular clamping strip 501 can move towards the installation insert 402 and insert into the inside of the clamping groove 403 to limit the installation insert 402. And when the rectangular clamping strip 501 moves towards the installation insert 402, the tension spring 502 can be stretched. When the inclined surface part of the rectangular adjusting block 603 moves outside the adjusting groove 503, the rectangular clamping strip 501 can be pulled to move away from the installation insert 402 under the tension of the tension spring 502. When one end of the rectangular clamping strip 501 away from the tension spring 502 completely disengages from the clamping groove 403, the installation insert 402 can be disassembled.

[0046] The implementation principle of a pit-digging and sowing device for Panax notoginseng planting in an embodiment of this application is as follows:

[0047] During use, when pit-digging is required, the user pushes this application to the working position through the push frame 1. By starting the lifting assembly 2, the soil-shoveling assembly 4 can be driven to move downward and insert into the soil through the installation roller 3. The user can dig the soil by pushing the push frame 1, which is convenient for the user to sow Panax notoginseng. When the soil-shoveling assembly 4 is damaged, the user turns the locking assembly 6 to control the clamping assembly 5 to move to the side away from the soil-shoveling assembly 4, so that the clamping assembly 5 is separated from the clamping part with the soil-shoveling assembly 4, and it is convenient for the user to disassemble and replace the soil-shoveling assembly 4 from the installation roller 3. When the user installs the soil-shoveling assembly 4, the soil-shoveling assembly 4 can be first inserted and installed on the installation roller 3, and then the position of the clamping assembly 5 can be adjusted through the locking assembly 6, so that one end of the clamping assembly 5 is clamped with the soil-shoveling assembly 4, and the installation position between the soil-shoveling assembly 4 and the installation roller 3 can be restricted.

[0048] The above are all the preferred embodiments of this application. The protection scope of this application is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A pit digging and sowing device for planting Panax notoginseng, comprising a push frame (1), characterized in that: The top of the inner wall of the push frame (1) is connected to a lifting assembly (2) by bolts, the interior of the lifting assembly (2) is rotatably connected to a mounting roller (3), and a plurality of shoveling assemblies (4) are inserted into the mounting roller (3) in a circular motion; A plurality of clamping assemblies (5), each of the clamping assemblies (5) being arranged on one side of each of the shoveling assemblies (4) and being used for clamping and limiting the position of the shoveling assemblies (4); A plurality of locking components (6) are evenly and movably arranged on the installation roller (3), and each of the locking components (6) is correspondingly arranged on one side of each clamping component (5) for adjusting the position of the clamping component (5).

2. A pit digging and sowing device for planting Panax notoginseng according to claim 1, characterized in that: The lifting component (2) comprises a driving member (201) and a movable member (202); the driving member (201) is fixed relative to the top of the inner wall of the push frame (1); the upper surface of the movable member (202) is connected to the output end of the driving member (201); the interior of the movable member (202) is connected to the installation roller (3); the driving member (201) drives the movable member (202) to rise and fall, thereby driving the installation roller (3) to rise and fall.

3. A pit digging and sowing device for planting Panax notoginseng according to claim 2, characterized in that: One side of the movable part (202) is connected to a motor (7) via bolts, and an output end of the motor (7) is fixedly connected to one end of the installation roller (3).

4. The pit digging and sowing device for planting Panax notoginseng according to claim 2, characterized in that: The mounting roller (3) comprises a roller body (301) rotatably connected to the inside of the movable part (202); the outer wall of the roller body (301) is circumferentially provided with a plurality of mounting grooves (302); one end of a plurality of the shovel assemblies (4) is respectively located inside the plurality of the mounting grooves (302); a plurality of storage grooves (303) respectively connected to the plurality of the mounting grooves (302) are evenly provided inside the roller body (301); the clamping assembly (5) is located inside the storage grooves (303); a plurality of threaded holes (304) respectively connected to the plurality of the storage grooves (303) are evenly provided inside the roller body (301); and the locking assembly (6) is located inside the threaded holes (304).

5. The pit digging and sowing device for planting Panax notoginseng according to claim 4, characterized in that: The shovel assembly (4) comprises a shovel head (401), one side of the shovel head (401) is connected to a mounting strip (402), one end of the mounting strip (402) away from the shovel head (401) is located inside the mounting groove (302), an outer wall of the mounting strip (402) is provided with a clamping groove (403), and one end of the clamping assembly (5) is located inside the clamping groove (403).

6. The pit digging and sowing device for planting Panax notoginseng according to claim 5, characterized in that: The snap-on assembly (5) comprises a rectangular snap-on strip (501) located inside the storage slot (303), one end of the rectangular snap-on strip (501) is located inside the snap-on slot (403), one end of the rectangular snap-on strip (501) away from the snap-on slot (403) is elastically connected to a tension spring (502), one end of the tension spring (502) away from the rectangular snap-on strip (501) is elastically connected to the inner wall of the roller body (301), an adjustment slot (503) is provided on one side of the rectangular snap-on strip (501) close to the locking assembly (6), and one end of the locking assembly (6) is located inside the adjustment slot (503).

7. The pit digging and sowing device for planting Panax notoginseng according to claim 6, characterized in that: The locking assembly (6) comprises an adjusting bolt (601) threadedly connected to the inside of the threaded hole (304); the adjusting bolt (601) is rotatably connected to a connecting head (602) at one end close to the rectangular clamping strip (501); the connecting head (602) is fixedly connected to a rectangular adjusting block (603) at one end away from the adjusting bolt (601); and the end of the rectangular adjusting block (603) away from the adjusting bolt (601) is located inside the adjusting groove (503).

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