Multifunctional compression spring machine

Abstract

The present invention discloses a multifunctional spring compression machine in the field of spring manufacturing, comprising a frame and a cutting device, a baffle is installed on the left surface of the frame, a first transmission wheel is installed on the side of the grinding wheel, a connecting rod is installed on the side of the second transport wheel, a rocker is installed on the side of the fan-shaped gear, a first threaded rod is installed inside the fan-shaped gear, a limiting hole is etched on the surface of the rotating wheel, a telescopic ring is installed at the tail of the sliding rod, a hydraulic rod is installed on the side deviation of the telescopic ring, a third motor is installed on the top deviation of the limiting wheel, a sleeve rod is installed on the surface of the rotating rod, a telescopic rod is installed on the bottom of the rotating rod, and a spring is installed on the surface of the gear rod. When springs of different diameters need to be manufactured, the rotating wheel can be rotated so that the sliding rod drives the telescopic ring to form a telescopic structure, so as to adjust the diameter of the circle surrounded by the telescopic ring, so as to produce springs of different models.

Description

Technical Field

[0001] The invention relates to the field of spring production, in particular to a multifunctional compression spring machine. Background Art

[0002] A spring is a mechanical part that uses elasticity to work. It is generally made of steel. At present, the production of springs is mainly carried out through mechanical equipment, and compression spring machines are one of them. The emergence of compression spring machines has greatly improved the production efficiency of springs and can meet the production of springs of various shapes, bringing great benefits to the spring manufacturing industry.

[0003] However, many compression spring machines on the market currently do not have the function of adjusting the spring diameter. One type of compression spring machine can often only produce one type of spring, and it does not have the function of grinding the steel before it is produced into a spring, resulting in a rough surface of the produced spring. For this reason, we propose a multifunctional compression spring machine. Summary of the invention

[0004] The object of the present invention is to provide a multifunctional spring compression machine to solve the problem mentioned in the above background technology that many spring compression machines on the market do not have the function of adjusting the spring diameter and grinding the steel.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multifunctional spring compression machine, comprising a frame and a cutting device, a baffle is installed on the left surface of the frame, and a grinding wheel is installed at the bottom deviation of the baffle, a first transmission wheel is installed on the side of the grinding wheel, and a support rod is installed on the side deviation of the first transmission wheel, a first transport wheel is installed on the side of the support rod, a transmission rod is installed on the surface of the first transport wheel, and a first motor is installed on the side deviation of the transmission rod, a connecting rod is installed on the opposite side of the first transport wheel of the first motor, and a second transport wheel is installed on the side of the connecting rod, a connecting rod is installed on the side of the second transport wheel, and a fan gear is installed on the top of the connecting rod, a rocker is installed on the side of the fan gear, and a A first threaded rod, the cutting device is installed deviatingly on the side of the first threaded rod, and a second motor is installed on the side of the cutting device, a lower cutting knife is installed deviatingly on the bottom of the cutting device, and a rotating wheel is installed deviatingly on the side of the lower cutting knife, a limiting hole is etched on the surface of the rotating wheel, a sliding rod is inlaid on the inner side of the limiting hole, and a telescopic ring is installed at the tail of the sliding rod, a hydraulic rod is installed deviatingly on the side of the telescopic ring, and a limiting wheel is installed on the side of the hydraulic rod, a third motor is installed deviatingly on the top of the limiting wheel, and a rotating rod is installed at the bottom of the third motor, a sleeve rod is installed on the surface of the rotating rod, a telescopic rod is installed at the bottom of the rotating rod, and a blocking rod is installed at the bottom of the telescopic rod, a compression spring is installed on the surface of the blocking rod, and a fixing plate is installed at the bottom of the compression spring.

[0006] As a further solution of the present invention: the grinding wheel is connected to the frame by an axis, the first transmission wheel and the grinding wheel are of an integrated design, and the position relationship between the first transmission wheel and the transmission rod is staggered. When the transmission rod rotates, it can drive the first transmission wheel to rotate, thereby driving the grinding wheel to rotate.

[0007] As a further solution of the present invention: the transmission rod and the first transport wheel are of an integrated design, the first transport wheel is electrically connected to the first motor and a rotating structure is formed through the transmission rod and the grinding wheel of the first transmission wheel belt. The equipment can grind the material before processing it to increase the smoothness of the material surface.

[0008] As a further solution of the present invention: the connecting rod and the first transport wheel and the second transport wheel are all fixedly installed, the connecting rod node is an axis connection, and the first transport wheel drives the second transport wheel through the first motor and the connecting rod to form a rotating structure, so that it can support the material and transport the material by rotation.

[0009] As a further solution of the present invention: the rocker arm is fixedly connected to the sector gear, the sector gear is movably connected to the first threaded rod, the connecting rod and the first threaded rod are of an integrated design, and the rocker arm drives the second transport wheel through the first threaded rod and the connecting rod to form a lifting structure, thereby adjusting the distance between the second transport wheel and the first transport wheel, so that the two sets of transport wheels can transport materials of different specifications.

[0010] As a further solution of the present invention: the sliding rod and the limiting hole are slidably connected, the telescopic ring is of a disconnected design, and the telescopic ring forms a telescopic structure through a rotating wheel and a sliding rod, thereby changing the diameter of the telescopic ring, so that the equipment can produce springs of various specifications.

[0011] As a further solution of the present invention: the cutting device includes a supporting plate, a second threaded rod, a first movable plate, a closing plate, a transmission plate, a second movable plate and an upper cutting knife, the supporting plate is installed on the top inner surface of the frame, and the second threaded rod is installed on the side of the supporting plate, the first movable plate is installed on the surface of the second threaded rod, and the closing plate is installed on the side of the first movable plate, the transmission plate is installed at the tail of the closing plate, and the second movable plate is installed at the bottom of the transmission plate, and the upper cutting knife is installed at the bottom of the second movable plate. Through the setting of the cutting knife, the equipment has the function of separating finished products from unprocessed products.

[0012] As a further solution of the present invention: the first movable plate and the second threaded rod are movably connected, the second threaded rod and the second motor are electrically connected to form a rotating structure, the transmission plate and the opening and closing plate are axially connected, and the opening and closing plate forms a telescopic structure through the first movable plate, and there are two groups of the first movable plates in total, the two groups of the first movable plates have threaded designs on the inner sides, the two groups of threads are designed in opposite directions, and the two groups of first movable plates form relative motion through the second threaded rod, so that the opening and closing plates form a telescopic structure, and the upper cutting knife is driven to rise or fall through the opening and closing plates.

[0013] As a further solution of the present invention: the second movable plate and the support plate are installed in a close fit, the second movable plate and the transmission plate are designed as an integrated whole, and the upper cutting knife forms a shearing structure through the second movable plate and the lower cutting knife, so that the equipment does not need manual labor to cut the material, which greatly improves the production efficiency.

[0014] As a further solution of the present invention: the surface of the telescopic rod is designed to be inclined at 45°, the rotating rod is formed into a rotating structure by a third motor, and the baffle rod is formed into a telescopic structure by the rotating rod and the telescopic rod. When the material is wound on the telescopic ring, it will be shifted by the action of the baffle rod, thereby preventing the spring from being wound in the same place all the time.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The multifunctional compression spring machine, through the setting of the grinding wheel and the baffle, when the two sets of transport wheels are transporting steel, the grinding wheel will rotate through the first transport wheel and the transmission rod, and grind the steel before it reaches the transport wheel, solving the problem of rough surface of the spring after production.

[0017] 2. When different types of steel are needed for this multifunctional compression spring machine, the distance between the two sets of transport wheels may not match the size of the steel, resulting in the inability to transport the materials. At this time, by shaking the rocker, the fan-shaped gear can be rotated, and the threaded rod will drive the upper transport wheel to rise and fall, so that different types of materials can pass through.

[0018] 3. The multifunctional spring compression machine, through the setting of the rotating wheel, when it is necessary to manufacture springs of different diameters, can rotate the rotating wheel so that the slide rod drives the telescopic ring to form a telescopic structure, thereby adjusting the diameter of the circle surrounded by the telescopic ring, so as to produce springs of different models.

[0019] 4. For this multifunctional compression spring machine, when the spring is manufactured, the second motor will drive the second threaded rod to rotate, and the two sets of first moving plates will move toward the center of the second threaded rod. During the movement, the second moving plate will drive the upper cutting knife to move downward and cooperate with the lower cutting knife to cut the steel.

[0020] 5. The multifunctional spring compression machine, when the rotating rod is rotated by the third motor, since the top surface of the telescopic rod is designed as an inclined surface, when the rotating rod is rotated to the highest point of the top of the telescopic rod, the stopper rod is pushed out of the sleeve rod through the telescopic rod, so that the stopper rod limits the spring and prevents the steel from twisting in place and failing to form a spring shape. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the transport wheel structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the telescopic ring structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure of the rotating rod of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure of the cutting device of the present invention.

[0026] In the figure: 1, frame; 2, baffle; 3, grinding wheel; 4, first transmission wheel; 5, support rod; 6, first transport wheel; 7, transmission rod; 8, first motor; 9, linkage rod; 10, second transport wheel; 11, connecting rod; 12, sector gear; 13, first threaded rod; 14, rocker; 15, cutting device; 1501, support plate; 1502, second threaded rod; 1503, first movable plate; 1504, opening and closing plate; 1505, transmission plate; 1506, second movable plate; 1507, upper cutting knife; 16, second motor; 17, lower cutting knife; 18, rotating wheel; 19, limiting hole; 20, sliding rod; 21, hydraulic rod; 22, limiting wheel; 23, third motor; 24, sleeve rod; 25, rotating rod; 26, compression spring; 27, telescopic rod; 28, baffle rod; 29, telescopic ring; 30, fixed plate. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figures 1 to 5In the embodiment of the present invention, the multifunctional compression spring machine includes a frame 1 and a cutting device 15, a baffle plate 2 is installed on the left surface of the frame 1, and a grinding wheel 3 is installed at the bottom of the baffle plate 2, a first transmission wheel 4 is installed on the side of the grinding wheel 3, and a support rod 5 is installed on the side of the first transmission wheel 4, a first transport wheel 6 is installed on the side of the support rod 5, a transmission rod 7 is installed on the surface of the first transport wheel 6, and a first motor 8 is installed on the side of the transmission rod 7, a connecting rod 9 is installed on the opposite side of the first transport wheel 6 of the first motor 8, and a second transport wheel 10 is installed on the side of the connecting rod 9, a connecting rod 11 is installed on the side of the second transport wheel 10, and a fan gear 12 is installed on the top of the connecting rod 11, a rocker 14 is installed on the side of the fan gear 12, a first threaded rod 13 is installed inside the fan gear 12, a cutting device 15 is installed on the side of the first threaded rod 13, and a second motor 16 is installed on the side of the cutting device 15, and a cutting device 15 is installed on the side of the first threaded rod 13. The bottom of the cutting device 15 is deviated from the installation of a lower cutting knife 17, and the side of the lower cutting knife 17 is deviated from the installation of a rotating wheel 18, the surface of the rotating wheel 18 is etched with a limiting hole 19, the inner side of the limiting hole 19 is inlaid with a sliding rod 20, and the tail of the sliding rod 20 is installed with a telescopic ring 29, the side of the telescopic ring 29 is deviated from the installation of a hydraulic rod 21, and the side of the hydraulic rod 21 is installed with a limiting wheel 22, the top of the limiting wheel 22 is deviated from the installation of a third motor 23, and the bottom of the third motor 23 is installed with a rotating rod 25, the surface of the rotating rod 25 is installed with a sleeve rod 24, the bottom of the rotating rod 25 is installed with a telescopic rod 27, and the bottom of the telescopic rod 27 is installed with a blocking rod 28, the surface of the blocking rod 28 is installed with a compression spring 26, and the bottom of the compression spring 26 is installed with a fixing plate 30. The equipment has good linkage, simple operation, high degree of automation, no need for manual complex operations, greatly improves the production efficiency of the spring, and can adapt to the production of springs of different specifications.

[0029] Among them, the grinding wheel 3 is connected to the frame 1 by an axis, the first transmission wheel 4 and the grinding wheel 3 are of an integrated design, and the position relationship between the first transmission wheel 4 and the transmission rod 7 is staggered. When the transmission rod 7 rotates, it can drive the first transmission wheel 4 to rotate, thereby driving the grinding wheel 3 to rotate; the transmission rod 7 and the first transport wheel 6 are of an integrated design, the first transport wheel 6 is electrically connected to the first motor 8 and drives the grinding wheel 3 through the transmission rod 7 and the first transmission wheel 4 to form a rotating structure, so that the equipment can grind the material before processing it to increase the smoothness of the material surface; the linkage rod 9 is connected to the first transport wheel 6 and the second transport wheel 1 0 are all fixedly installed, the node of the connecting rod 9 is an axial connection, and the first transport wheel 6 drives the second transport wheel 10 through the first motor 8 and the connecting rod 9 to form a rotating structure, so that it can support the material and transport the material by rotation; the rocker 14 and the fan gear 12 are fixedly connected, the fan gear 12 and the first threaded rod 13 are movably connected, the connecting rod 11 and the first threaded rod 13 are of an integrated design, and the rocker 14 drives the second transport wheel 10 through the first threaded rod 13 and the connecting rod 11 to form a lifting structure, so as to adjust the distance between the first transport wheel 6, so that the two sets of transport wheels can transport materials of different specifications.

[0030] The slide bar 20 is slidably connected to the limiting hole 19, the telescopic ring 29 is a disconnected design, and the telescopic ring 29 forms a telescopic structure through the rotating wheel 18 and the slide bar 20, so as to change the diameter of the telescopic ring 29, so that the equipment can produce springs of various specifications; the cutting device 15 includes a support plate 1501, a second threaded rod 1502, a first movable plate 1503, a closing plate 1504, a transmission plate 1505, a second movable plate 1506 and an upper cutting knife 1507, the support plate 1501 is installed on the top inner surface of the frame 1, and the second threaded rod 1502 is installed on the side of the support plate 1501, and the second threaded rod 1502 is installed on the side of the support plate 1501. The first movable plate 1503 is installed on the surface of the second threaded rod 1502, and the side of the first movable plate 1503 is installed with a closing plate 1504, the tail of the closing plate 1504 is installed with a transmission plate 1505, and the bottom of the transmission plate 1505 is installed with a second movable plate 1506, and the bottom of the second movable plate 1506 is installed with an upper cutting knife 1507. Through the setting of the upper cutting knife 1507, the device has the function of separating the finished product from the unprocessed product; the first movable plate 1503 and the second threaded rod 1502 are movably connected, and the second threaded rod 1502 is electrically connected to the second motor 16. The transmission plate 1505 and the opening and closing plate 1504 are connected by an axis, and the opening and closing plate 1504 forms a telescopic structure through the first movable plate 1503. The first movable plate 1503 is provided with two groups. The inner sides of the two groups of first movable plates 1503 are provided with a thread design. The two groups of threads are designed in opposite directions, and the two groups of first movable plates 1503 form relative motion through the second threaded rod 1502, so that the opening and closing plate 1504 forms a telescopic structure, and the upper cutting knife 1507 is driven to rise or fall through the opening and closing plate 1504; the second movable plate 1506 and the support plate 1501 are attached to each other. The second movable plate 1506 and the transmission plate 1505 are integrally designed, and the upper cutting knife 1507 forms a shearing structure through the second movable plate 1506 and the lower cutting knife 17, so that the equipment does not need to manually cut the material, which greatly improves the production efficiency; the surface of the telescopic rod 27 is designed to be inclined at 45°, the rotating rod 25 forms a rotating structure through the third motor 23, and the blocking rod 28 forms a telescopic structure through the rotating rod 25 and the telescopic rod 27. When the material is wound on the telescopic ring 29, it will be displaced by the action of the blocking rod 28 to prevent the spring from always winding in the same place.

[0031] The working principle of the present invention is as follows: when the multifunctional compression spring machine is in use, the first motor 8 is first turned on, and the transmission rod 7 will rotate with the first transport wheel 6. Since the positions of the first transmission wheel 4 and the first transport wheel 6 are designed to be staggered, when the transmission rod 7 rotates, the first transmission wheel 4 will also rotate together, so that the grinding wheel 3 forms a rotating structure. At this time, when the first transport wheel 6 rotates, the second transport wheel 10 will be driven to rotate through the connecting rod 9, so that the two sets of transport wheels clamp the steel and transport it forward. When the steel reaches the grinding wheel 3, the grinding wheel 3 will be in cooperation with the baffle 2. The surface of the steel is polished and then it is transported forward through two sets of grinding wheels 3. When it is transported to the bottom of the telescopic ring 29, the hydraulic rod 21 drives the limiting wheel 22 to extend forward. At this time, the third motor 23 drives the rotating rod 25 to rotate. When the rotating rod 25 rotates to the highest point on the top of the telescopic rod 27, the telescopic rod 27 extends downward and pushes the blocking rod 28 out of the sleeve rod 24. When the steel contacts the limiting wheel 22, the steel begins to twist along the telescopic ring 29. Under the action of the blocking rod 28, the steel will shift its position when twisted to prevent it from always winding at the origin. When the processing is completed, the second threaded rod 1502 can be driven to rotate by the second motor 16, and the first movable plate 1503 will move toward the center point of the second threaded rod 1502. During the movement, the opening and closing plate 1504 will drive the second movable plate 1506 and the upper cutting knife 1507 to move downward through the transmission plate 1505. The upper cutting knife 1507 will cooperate with the lower cutting knife 17 to cut the steel, so that the processed steel is separated from the unprocessed steel. When it is necessary to deal with steel of different sizes, the gap between the two sets of transport wheels may cause the steel to be unable to be transported normally. At this time By shaking the rocker 14, the sector gear 12 rotates, and the first threaded rod 13 will drive the second transport wheel 10 to form a telescopic structure, so as to adjust the distance between the transport wheels so that it can transport steels of different sizes. When the diameter of the produced spring needs to be adjusted, by rotating the rotating wheel 18, the slide rod 20 will be driven to extend outward under the action of the limiting hole 19, so that the diameter of the telescopic ring 29 is expanded. When the steel is wound around the telescopic ring 29, the diameter of the spring produced will also be expanded. This is the entire working principle of the multifunctional compression spring machine.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A multifunctional compression spring machine, comprising a frame (1) and a cutting device (15), characterized in that: A baffle (2) is mounted on the left side surface of the frame (1), and a grinding wheel (3) is mounted offset from the bottom of the baffle (2), a first transmission wheel (4) is mounted on the side of the grinding wheel (3), and a support rod (5) is mounted offset from the side of the first transmission wheel (4), a first transport wheel (6) is mounted on the side of the support rod (5), a transmission rod (7) is mounted on the surface of the first transport wheel (6), and a first motor (8) is mounted offset from the side of the transmission rod (7), and the first motor (8) is connected to the first A connecting rod (9) is installed on the opposite side of the transport wheel (6), and a second transport wheel (10) is installed on the side of the connecting rod (9), a connecting rod (11) is installed on the side of the second transport wheel (10), and a fan-shaped gear (12) is installed on the top of the connecting rod (11), a rocker (14) is installed on the side of the fan-shaped gear (12), and a first threaded rod (13) is installed inside the fan-shaped gear (12), and the cutting device (15) is installed offset from the side of the first threaded rod (13), and the cutting device (15) is installed on the side of the first threaded rod (13). A second motor (16) is installed on the side of the device (15); a lower cutting knife (17) is installed at a deviation from the bottom of the cutting device (15); a rotating wheel (18) is installed at a deviation from the side of the lower cutting knife (17); a limiting hole (19) is etched on the surface of the rotating wheel (18); a sliding rod (20) is embedded inside the limiting hole (19); a telescopic ring (29) is installed at the tail of the sliding rod (20); a hydraulic rod (21) is installed at a deviation from the side of the telescopic ring (29); and the side of the hydraulic rod (21) is A limit wheel (22) is installed on the surface, a third motor (23) is installed at the top of the limit wheel (22), and a rotating rod (25) is installed at the bottom of the third motor (23), a sleeve rod (24) is installed on the surface of the rotating rod (25), a telescopic rod (27) is installed at the bottom of the rotating rod (25), and a blocking rod (28) is installed at the bottom of the telescopic rod (27), a compression spring (26) is installed on the surface of the blocking rod (28), and a fixing plate (30) is installed at the bottom of the compression spring (26); The grinding wheel (3) is axially connected to the frame (1), the first transmission wheel (4) and the grinding wheel (3) are of an integrated design, and the first transmission wheel (4) and the transmission rod (7) are arranged in a staggered manner; The transmission rod (7) and the first transport wheel (6) are of an integrated design; the first transport wheel (6) is electrically connected to the first motor (8) and drives the grinding wheel (3) through the transmission rod (7) and the first transmission wheel (4) to form a rotating structure; The connecting rod (9) and the first transport wheel (6) and the second transport wheel (10) are all fixedly mounted, the node of the connecting rod (9) is connected by an axis, and the first transport wheel (6) drives the second transport wheel (10) through the first motor (8) and the connecting rod (9) to form a rotating structure; The slide rod (20) is slidably connected to the limiting hole (19), the telescopic ring (29) is of a disconnectable design, and the telescopic ring (29) forms a telescopic structure through the rotating wheel (18) and the slide rod (20); The cutting device (15) comprises a support plate (1501), a second threaded rod (1502), a first movable plate (1503), a closing plate (1504), a transmission plate (1505), a second movable plate (1506) and an upper cutting knife (1507); the support plate (1501) is mounted on the top inner surface of the frame (1), and the second threaded rod (1502) is mounted on the side of the support plate (1501); the first movable plate (1503) is mounted on the surface of the second threaded rod (1502), and the closing plate (1504) is mounted on the side of the first movable plate (1503); the transmission plate (1505) is mounted at the rear of the closing plate (1504), and the second movable plate (1506) is mounted at the bottom of the transmission plate (1505); and the upper cutting knife (1507) is mounted at the bottom of the second movable plate (1506).

2. The multifunctional compression spring machine according to claim 1, characterized in that: The rocker (14) and the sector gear (12) are fixedly connected, the sector gear (12) and the first threaded rod (13) are movably connected, the connecting rod (11) and the first threaded rod (13) are of an integrated design, and the rocker (14) drives the second transport wheel (10) through the first threaded rod (13) and the connecting rod (11) to form a lifting structure.

3. The multifunctional compression spring machine according to claim 1, characterized in that: The first movable plate (1503) and the second threaded rod (1502) are movably connected, the second threaded rod (1502) and the second motor (16) are electrically connected to form a rotating structure, the transmission plate (1505) and the opening and closing plate (1504) are axially connected, and the opening and closing plate (1504) forms a telescopic structure through the first movable plate (1503), and the first movable plates (1503) are provided with two groups, the inner sides of the two groups of the first movable plates (1503) are provided with a thread design, the two groups of threads are designed in opposite directions, and the two groups of the first movable plates (1503) form relative motion through the second threaded rod (1502).

4. The multifunctional compression spring machine according to claim 1, characterized in that: The second movable plate (1506) and the support plate (1501) are fitted together, the second movable plate (1506) and the transmission plate (1505) are of an integrated design, and the upper cutting knife (1507) forms a shearing structure through the second movable plate (1506) and the lower cutting knife (17).

5. The multifunctional compression spring machine according to claim 1, characterized in that: The surface of the telescopic rod (27) is designed to be inclined at 45 degrees, the rotating rod (25) forms a rotating structure through the third motor (23), and the blocking rod (28) is telescopic through the rotating rod (25) and the telescopic rod (27).

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