Equivalent mixing device for various coarse cereals

Abstract

The invention belongs to the technical field of coarse cereal mixing, and discloses a multi-coarse cereal equivalent mixing device which comprises a bottom plate, mounting plates are fixedly connected to the two sides of the top of the bottom plate, a fixing plate is fixedly connected to one side of each mounting plate, and a stepping motor is fixedly connected to the middle of each fixing plate; one end of the stepping motor is fixedly connected with a driving module, and one end of the driving module is fixedly connected with a connecting rod. Through the arrangement of structures such as a stepping motor, a driving module, an ejection module, a supporting frame and a limiting module, the stepping motor drives a driving shaft to rotate, the driving shaft drives a first bevel gear to rotate, the first bevel gear is engaged with a second bevel gear and drives the second bevel gear to rotate, and the second bevel gear drives a connecting rod to rotate; the connecting rod drives the rotating top plate to rotate, and the rotating top plate abuts against the top wheel, so that the coarse cereal particles can be screened in the same type, and the material ratio of each bag of products after mixed packaging can be equal.

Description

Technical Field

[0001] The invention belongs to the technical field of grain mixing, in particular to a device for mixing multiple grains in equal amounts. Background Art

[0002] Coarse grains is a broad category, referring to various cereals, beans, and potato crops other than the four major varieties of rice, wheat, corn, and soybeans. These crops usually do not need to be planted and harvested on a large scale like the main grains, and therefore can be used as supplementary food or feed. A moderate intake of coarse grains in daily diet can help maintain good health and balanced nutrition. Most of the coarse grains seen in daily life are vacuum-packed, which is convenient for people to buy on a daily basis. Before packaging, most of the coarse grains need to be mixed by a multi-grain equal-amount mixing device, and a multi-grain equal-amount mixing device is usually designed to achieve precise mixing of different types of grains in predetermined proportions. Such devices are widely used in food processing, nutritional meal preparation, feed production and other fields.

[0003] In the prior art, grains need to be screened in equal amounts before mixed packaging. After the same grains are screened out, different grains are proportionally distributed, and finally the equally distributed grains are packaged. However, in the process of grain distribution, most of the grains are screened by staff, and it is impossible to ensure that the same grains are not mixed with other types of grains. This easily leads to different grain sizes, and the staff cannot concentrate all the time, which easily leads to large differences in the material ratio of each package of products after the mixed grains are packaged. A device for mixing multiple grains in equal amounts is now proposed to solve the above problems. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a device for mixing equal amounts of various grains, which solves the problem that due to the different sizes of grains, the material ratio of each package of products after mixed packaging often varies greatly.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a device for mixing equal amounts of various grains, comprising a bottom plate, both sides of the top of the bottom plate are fixedly connected with mounting plates, one side of the mounting plate is fixedly connected with a fixing plate, the middle part of the fixing plate is fixedly connected with a stepping motor, one end of the stepping motor is fixedly connected with a driving module, one end of the driving module is fixedly connected with a connecting rod, the middle part of the connecting rod is fixedly connected with an ejection module, one side of the ejection module is fixedly connected with a support frame, both sides of the support frame are movably connected with a limiting module, the other side of the mounting plate is fixedly connected with a supporting module, the middle part of the support frame is movably connected with a mounting shaft, the outside of the mounting shaft is detachably connected with a sieve cylinder, the top of the sieve cylinder is fixedly connected with a feed port, the inside of the sieve cylinder is detachably connected with a sieve plate, the bottom of the sieve cylinder is fixedly connected with an inclined plate, the middle part of the bottom of the sieve cylinder is fixedly connected with a discharge port, the inside of the discharge port is movably connected with a plug, and both ends of the mounting shaft are movably connected with a fixing module.

[0006] Preferably, the driving module comprises a driving shaft, one end of the driving shaft is fixedly connected to a first bevel gear, and an outer edge of the first bevel gear is meshed with a second bevel gear.

[0007] Preferably, one end of the drive shaft is fixedly connected to the output end of the stepper motor, the outside of the drive shaft is rotatably connected to the fixed plate, the bottom of the first bevel gear abuts the fixed plate, and one side of the second bevel gear is fixedly connected to the connecting rod.

[0008] Preferably, the ejection module comprises a rotating top plate, the outside of the rotating top plate is movably connected to a top wheel, and both sides of the top wheel are rotatably connected to connecting plates.

[0009] Preferably, the interior of the rotating top plate is fixedly connected to the connecting rod, the rotating top plate is an elliptical structure, and the top of the connecting plate is fixedly connected to the supporting frame.

[0010] Preferably, the limiting module comprises a limiting column, and the top end of the limiting column is fixedly connected to the limiting plate;

[0011] Among them, the bottom end of the limiting column is fixedly connected to the mounting plate, the outside of the limiting column is movably connected to the support frame, the outside of the limiting plate is movably connected to the support frame, and the limiting plate is a cross-shaped structure.

[0012] Preferably, the support module comprises a first support rod, a support spring is fixedly sleeved on the outside of the first support rod, and one end of the support spring is fixedly connected to a second support rod.

[0013] Preferably, one end of the first support rod is fixedly connected to the mounting plate, one end of the second support rod is fixedly connected to the support frame, and the support module is a symmetrical structure.

[0014] Preferably, the fixing module comprises a bottom frame, a top frame is hingedly connected to the top of the bottom frame, and a fixing pin is threadedly connected to one side of the top frame.

[0015] Preferably, one side of the bottom frame is fixedly connected to the support frame, the insides of the top frame and the bottom frame are movably connected to the mounting shaft, and the outside of the fixing pin is threadedly connected to the bottom frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention is provided with structures such as a stepping motor, a driving module, an ejection module, a support frame, and a limiting module. The stepping motor drives the driving shaft to rotate, the driving shaft drives the first bevel gear to rotate, the first bevel gear meshes with the second bevel gear and drives the second bevel gear to rotate, the second bevel gear drives the connecting rod to rotate, the connecting rod drives the rotating top plate to rotate, the rotating top plate abuts against the top wheel, so that the top wheel moves up and down through the rotation of the rotating top plate, the top wheel drives the support frame to move up and down through the connecting plate, and at the same time, the support frame drives the second support rod to move up and down along the rod wall of the limiting column, so that the support frame vibrates, so that the grain particles can be screened in the same way, so that the material ratio of each package of products after mixed packaging can be equal;

[0018] The present invention is provided with structures such as an installation shaft, a screen cylinder, a screen plate, an inclined plate, and a fixing module. The miscellaneous grains on the top of the screen plate are screened by vibration, so that the same kind of miscellaneous grain particles slide through the screen plate to the inclined plate, and then fall to the bottom of the screen cylinder for accumulation. After the same kind of miscellaneous grains are screened, the fixing pin is rotated and screwed out, and the top frame is turned over with the hinge with the bottom frame as the center of the circle, and the screen cylinder is removed by lifting the installation shaft, and the obstruction can be pulled out to allow the miscellaneous grains to flow out through the discharge port. When it is necessary to screen the miscellaneous grains that have not been screened, they can be poured out and replaced with sieve plates of different numbers and sizes, so that the device can be suitable for sieve plates of different numbers and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 For the present invention Figure 1 A schematic diagram of the enlarged relationship structure of the structure at A in the middle;

[0021] Figure 3 It is a schematic diagram of the cross-sectional relationship structure of the support frame of the present invention;

[0022] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged relationship structure of the structure at B in the middle;

[0023] Figure 5 It is a schematic diagram of the cross-sectional structure of the screen drum of the present invention;

[0024] Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged relationship structure of the structure at C in the middle.

[0025] In the figure: 1, bottom plate; 2, mounting plate; 3, fixing plate; 4, stepping motor; 5, driving module; 511, driving shaft; 512, first bevel gear; 513, second bevel gear; 6, connecting rod; 7, ejection module; 711, rotating top plate; 712, top wheel; 713, connecting plate; 8, supporting frame; 9, limiting module; 911, limiting column; 912, limiting plate; 10, supporting module; 1011, first support rod; 1012, supporting spring; 1013, second support rod; 11, mounting shaft; 12, screen drum; 13, feed port; 14, screen plate; 15, inclined plate; 16, discharge port; 17, blocking; 18, fixing module; 1811, bottom frame; 1812, top frame; 1813, fixing pin. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figures 1 to 6 As shown, the present invention provides a device for mixing multiple grains in equal amounts, including a bottom plate 1, both sides of the top of the bottom plate 1 are fixedly connected to mounting plates 2, one side of the mounting plate 2 is fixedly connected to a fixing plate 3, the middle of the fixing plate 3 is fixedly connected to a stepping motor 4, one end of the stepping motor 4 is fixedly connected to a driving module 5, one end of the driving module 5 is fixedly connected to a connecting rod 6, the middle of the connecting rod 6 is fixedly connected to an ejection module 7, one side of the ejection module 7 is fixedly connected to a supporting frame 8, and both sides of the supporting frame 8 are movably connected to a limiting module Group 9, the other side of the mounting plate 2 is fixedly connected with a support module 10, the middle part of the support frame 8 is movably connected with a mounting shaft 11, the outside of the mounting shaft 11 is detachably connected with a screen drum 12, the top of the screen drum 12 is fixedly connected with a feed port 13, the inside of the screen drum 12 is detachably connected with a screen plate 14, the bottom of the screen drum 12 is fixedly connected with an inclined plate 15, the middle part of the bottom of the screen drum 12 is fixedly connected with a discharge port 16, the inside of the discharge port 16 is movably connected with a plug 17, and both ends of the mounting shaft 11 are movably connected with a fixing module 18;

[0028] By pouring the grains from the feed port 13 into the screen drum 12, the grains are accumulated on the screen plate 14, the stepper motor 4 drives the driving shaft 511 to rotate, the driving shaft 511 drives the first bevel gear 512 to rotate, the first bevel gear 512 meshes with the second bevel gear 513 and drives the second bevel gear 513 to rotate, the second bevel gear 513 drives the connecting rod 6 to rotate, the connecting rod 6 drives the rotating top plate 711 to rotate, the rotating top plate 711 abuts against the top wheel 712, so that the top wheel 712 moves up and down through the rotation of the rotating top plate 711, the top wheel 712 drives the support frame 8 to move up and down through the connecting plate 713, and at the same time the support frame 8 drives the second support rod 1013 to move up and down along the rod wall of the limiting column 911, so that the support frame 8 vibrates;

[0029] The grains on the top of the sieve plate 14 are screened by vibration, so that the same grain particles pass through the sieve plate 14 and slide to the inclined plate 15, and then fall to the bottom of the sieve drum 12 for accumulation. After the same grains are screened, the fixing pin 1813 is rotated and screwed out, and the top frame 1812 is turned over with the hinge with the bottom frame 1811 as the center of the circle, and the sieve drum 12 is removed by lifting the installation shaft 11, and the grains can be discharged through the discharge port 16 by pulling out the plug 17. When it is necessary to screen the unscreened grains, pour them out and replace them with sieve drums 12 of different numbers and sizes, so that the grains can be mixed evenly.

[0030] like Figure 1 , Figure 3 , Figure 5 As shown, the driving module 5 includes a driving shaft 511, one end of the driving shaft 511 is fixedly connected to a first bevel gear 512, the outer edge of the first bevel gear 512 is meshed with a second bevel gear 513, one end of the driving shaft 511 is fixedly connected to the output end of the stepping motor 4, the outside of the driving shaft 511 is rotatably connected to the fixing plate 3, the bottom of the first bevel gear 512 is in contact with the fixing plate 3, and one side of the second bevel gear 513 is fixedly connected to the connecting rod 6;

[0031] The ejection module 7 includes a rotating top plate 711, the outside of the rotating top plate 711 is movably connected to a top wheel 712, both sides of the top wheel 712 are rotatably connected to connecting plates 713, the inside of the rotating top plate 711 is fixedly connected to the connecting rod 6, the rotating top plate 711 is an elliptical structure, and the top of the connecting plate 713 is fixedly connected to the support frame 8;

[0032] The driving shaft 511 is driven to rotate by the stepper motor 4, and the driving shaft 511 drives the first bevel gear 512 to rotate. The first bevel gear 512 meshes with the second bevel gear 513 and drives the second bevel gear 513 to rotate. The second bevel gear 513 drives the connecting rod 6 to rotate, and the connecting rod 6 drives the rotating top plate 711 to rotate. The rotating top plate 711 abuts against the top wheel 712, so that the top wheel 712 moves up and down through the rotation of the rotating top plate 711. In the process of the top wheel 712 moving up and down, the top wheel 712 drives the support frame 8 to move up and down through the connecting plate 713, and the fixing plate 3 is supported and fixed by the mounting plate 2. The fixing plate 3 installs and fixes the stepping motor 4, and the fixing plate 3 limits the driving shaft 511. The two ends of the connecting rod 6 are rotatably connected with the two mounting plates 2.

[0033] like Figure 1 , Figures 3 to 5 As shown, the limiting module 9 includes a limiting column 911, and the top end of the limiting column 911 is fixedly connected to a limiting plate 912;

[0034] The bottom end of the limiting column 911 is fixedly connected to the mounting plate 2, the outside of the limiting column 911 is movably connected to the support frame 8, the outside of the limiting plate 912 is movably connected to the support frame 8, and the limiting plate 912 is a cross-shaped structure;

[0035] The support module 10 includes a first support rod 1011, a support spring 1012 is fixedly sleeved on the outside of the first support rod 1011, one end of the support spring 1012 is fixedly connected to a second support rod 1013, one end of the first support rod 1011 is fixedly connected to the mounting plate 2, one end of the second support rod 1013 is fixedly connected to the support frame 8, and the support module 10 is a symmetrical structure;

[0036] During the up and down movement of the top wheel 712, the top wheel 712 drives the support frame 8 to move up and down through the connecting plate 713, and the support frame 8 drives the second support rod 1013 to move up and down along the rod wall of the limiting column 911. When the support frame 8 moves up, the support frame 8 moves up along the limiting column 911, and the support frame 8 stretches the support spring 1012. When the support frame 8 moves down, the support frame 8 moves down along the limiting column 911, and the support frame 8 compresses the support spring 1012, and the first support rod 1011 is connected and fixed through the mounting plate 2, and the first support rod 1011 limits and fixes the support spring 1012, and one end of the support spring 1012 is connected to the second support rod 1013, and the first support rod 1011 and the second support rod 1013 can be limited and pulled through the support spring 1012, and the support frame 8 is limited by the limiting column 911, and the limiting plate 912 is located inside the support frame 8;

[0037] By providing structures such as a stepper motor 4, a driving module 5, an ejection module 7, a support frame 8, and a limiting module 9, the stepper motor 4 drives the driving shaft 511 to rotate, and the driving shaft 511 drives the first bevel gear 512 to rotate. The first bevel gear 512 meshes with the second bevel gear 513 and drives the second bevel gear 513 to rotate. The second bevel gear 513 drives the connecting rod 6 to rotate, and the connecting rod 6 drives the rotating top plate 711 to rotate. The rotating top plate 711 abuts against the top wheel 712, so that the top wheel 712 moves up and down through the rotation of the rotating top plate 711, and the top wheel 712 drives the support frame 8 to move up and down through the connecting plate 713. At the same time, the support frame 8 drives the second support rod 1013 to move up and down along the rod wall of the limiting column 911, so that the support frame 8 vibrates, so that the miscellaneous grain particles can be screened in the same way, so that the material ratio of each package of products after mixed packaging can be equal.

[0038] like Figures 1 to 3 , Figure 5 As shown, the clamping module 18 includes a bottom frame 1811, a top frame 1812 is hinged at the top of the bottom frame 1811, a fixing pin 1813 is threadedly connected to one side of the top frame 1812, one side of the bottom frame 1811 is fixedly connected to the support frame 8, the insides of the top frame 1812 and the bottom frame 1811 are both movably connected to the mounting shaft 11, and the outside of the fixing pin 1813 is threadedly connected to the bottom frame 1811;

[0039] By providing structures such as the mounting shaft 11, the screen drum 12, the screen plate 14, the inclined plate 15, and the fixing module 18, the grains on the top of the screen plate 14 are screened by vibration, so that the grains of the same kind pass through the screen plate 14 and slide to the inclined plate 15, and then fall to the bottom of the screen drum 12 for accumulation. After the grains of the same kind are screened, the fixing pin 1813 is rotated and screwed out, and the top frame 1812 is turned over with the hinge with the bottom frame 1811 as the center of the circle, and the screen drum 12 is removed by lifting the mounting shaft 11, and the plug 17 is pulled out to allow the grains to flow out through the discharge port 16. When it is necessary to screen the grains that have not been screened, they can be poured out and replaced with screen plates 14 of different numbers and sizes, so that the device can be suitable for screen plates 14 of different numbers and sizes;

[0040] During the up and down movement of the support frame 8, the support frame 8 vibrates, so that the grains on the top of the sieve plate 14 are screened by the vibration, so that the grains of the same kind pass through the sieve plate 14 and slide to the inclined plate 15, and then fall to the bottom of the sieve drum 12 for accumulation. After the grains of the same kind are screened, the fixing pin 1813 is rotated and screwed out, and the top frame 1812 is turned over with the hinge with the bottom frame 1811 as the center of the circle, and the sieve drum 12 is removed by lifting the installation shaft 11, and the plug 17 is pulled out to allow the grains to flow out through the discharge port 16, and the installation shaft 11 is limitedly supported by the bottom frame 1811, and the top frame 1812 is hinged so that the bottom frame 1811 and the top frame 1812 are clamped, and the bottom frame 1811 and the top frame 1812 are fixed by the fixing pin 1813, so that the two ends of the installation shaft 11 are limitedly fixed inside the bottom frame 1811 and the top frame 1812.

[0041] The working principle and use process of the present invention:

[0042] First, the grains are poured into the screen drum 12 through the feed port 13, and the grains are accumulated on the screen plate 14. At this time, the stepper motor 4 drives the driving shaft 511 to rotate, and the driving shaft 511 drives the first bevel gear 512 to rotate. The first bevel gear 512 meshes with the second bevel gear 513 and drives the second bevel gear 513 to rotate. The second bevel gear 513 drives the connecting rod 6 to rotate, and the connecting rod 6 drives the rotating top plate 711 to rotate. The rotating top plate 711 abuts against the top wheel 712, so that the top wheel 712 moves up and down through the rotation of the rotating top plate 711;

[0043] When the top wheel 712 moves up and down, the top wheel 712 drives the support frame 8 to move up and down through the connecting plate 713, and at the same time, the support frame 8 drives the second support rod 1013 to move up and down along the rod wall of the limiting column 911. When the support frame 8 moves up, the support frame 8 moves up along the limiting column 911, and the support frame 8 stretches the support spring 1012. When the support frame 8 moves down, the support frame 8 moves down along the limiting column 911, and the support frame 8 compresses the support spring 1012.

[0044] During the up and down movement of the support frame 8, the support frame 8 vibrates, so that the grains on the top of the sieve plate 14 are screened by the vibration, so that the same grain particles pass through the sieve plate 14 and slide to the inclined plate 15, and then fall to the bottom of the sieve cylinder 12 for accumulation. After the same grains are screened, the fixing pin 1813 is rotated and screwed out, and the top frame 1812 is turned over with the hinge with the bottom frame 1811 as the center of the circle, and the sieve cylinder 12 is removed by lifting the installation shaft 11, and the plug 17 is pulled out to allow the grains to flow out through the discharge port 16. When it is necessary to screen the unscreened grains, pour them out and replace them with sieve cylinders 12 of different numbers and sizes to complete the operation.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for mixing equal amounts of various grains, comprising a bottom plate (1), characterized in that: Both sides of the top of the bottom plate (1) are fixedly connected to a mounting plate (2), one side of the mounting plate (2) is fixedly connected to a fixing plate (3), the middle of the fixing plate (3) is fixedly connected to a stepping motor (4), one end of the stepping motor (4) is fixedly connected to a driving module (5), one end of the driving module (5) is fixedly connected to a connecting rod (6), the middle of the connecting rod (6) is fixedly connected to an ejection module (7), one side of the ejection module (7) is fixedly connected to a support frame (8), both sides of the support frame (8) are movably connected to a limiting module (9), and the other side of the mounting plate (2) is fixedly connected to a driving module (5). A support module (10) is connected, the middle part of the support frame (8) is movably connected to a mounting shaft (11), the outside of the mounting shaft (11) is detachably connected to a screen drum (12), the top of the screen drum (12) is fixedly connected to a feed port (13), the inside of the screen drum (12) is detachably connected to a screen plate (14), the bottom of the screen drum (12) is fixedly connected to an inclined plate (15), the middle part of the bottom of the screen drum (12) is fixedly connected to a discharge port (16), the inside of the discharge port (16) is movably connected to a plug (17), and both ends of the mounting shaft (11) are movably connected to a fixing module (18).

2. The device for mixing equal amounts of various grains according to claim 1, characterized in that: The driving module (5) comprises a driving shaft (511), one end of the driving shaft (511) is fixedly connected to a first bevel gear (512), and the outer edge of the first bevel gear (512) is meshed with a second bevel gear (513).

3. The device for mixing equal amounts of various grains according to claim 2, characterized in that: One end of the driving shaft (511) is fixedly connected to the output end of the stepping motor (4), the outside of the driving shaft (511) is rotatably connected to the fixed plate (3), the bottom of the first bevel gear (512) is in contact with the fixed plate (3), and one side of the second bevel gear (513) is fixedly connected to the connecting rod (6).

4. The device for mixing equal amounts of various grains according to claim 1, characterized in that: The ejection module (7) comprises a rotating top plate (711), the outside of the rotating top plate (711) is movably connected to a top wheel (712), and both sides of the top wheel (712) are rotatably connected to connecting plates (713).

5. The device for mixing equal amounts of various grains according to claim 4, characterized in that: The interior of the rotating top plate (711) is fixedly connected to the connecting rod (6); the rotating top plate (711) is an elliptical structure; and the top of the connecting plate (713) is fixedly connected to the supporting frame (8).

6. The device for mixing equal amounts of various grains according to claim 1, characterized in that: The limiting module (9) comprises a limiting column (911), and the top end of the limiting column (911) is fixedly connected to a limiting plate (912); The bottom end of the limiting column (911) is fixedly connected to the mounting plate (2), the outside of the limiting column (911) is movably connected to the support frame (8), the outside of the limiting plate (912) is movably connected to the support frame (8), and the limiting plate (912) is a cross-shaped structure.

7. The device for mixing equal amounts of various grains according to claim 1, characterized in that: The support module (10) comprises a first support rod (1011), the exterior of the first support rod (1011) is fixedly sleeved with a support spring (1012), and one end of the support spring (1012) is fixedly connected to a second support rod (1013).

8. The device for mixing equal amounts of various grains according to claim 7, characterized in that: One end of the first support rod (1011) is fixedly connected to the mounting plate (2), one end of the second support rod (1013) is fixedly connected to the support frame (8), and the support module (10) is a symmetrical structure.

9. The device for mixing equal amounts of various grains according to claim 1, characterized in that: The fixing module (18) comprises a bottom frame (1811), the top of the bottom frame (1811) is hingedly connected to a top frame (1812), and one side of the top frame (1812) is threadedly connected to a fixing pin (1813).

10. The device for mixing equal amounts of various grains according to claim 9, characterized in that: One side of the bottom frame (1811) is fixedly connected to the support frame (8), the interiors of the top frame (1812) and the bottom frame (1811) are movably connected to the mounting shaft (11), and the exterior of the fixing pin (1813) is threadedly connected to the bottom frame (1811).

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