Raw material automatic stereoscopic warehouse for lathe machining

Abstract

The invention discloses an automatic stereoscopic warehouse of raw materials for lathe processing, and relates to the technical field of wood storage. The raw material automatic stereoscopic warehouse for bed processing comprises a warehouse body, and a conveyor used for conveying wood is arranged in the warehouse body; the air inlet pipeline and the exhaust pipeline are assembled on the two sides of the warehouse body respectively. A first rotating rod is rotationally connected to the inner wall of the warehouse body, and a wind wheel is assembled on the top of the first rotating rod. According to the automatic raw material stereoscopic warehouse for lathe machining, an air pump is started, dry air is introduced into the warehouse body from an air inlet pipeline, humid air is exhausted through an exhaust pipeline, and a first rotating rod, a wind wheel, a first bevel gear, a first torsional spring rod, a second bevel gear, a first chain wheel, a chain, a second rotating rod and a second chain wheel are matched, so that a transverse flow guide plate rotates in a reciprocating mode; and dry air is guided to all positions in the warehouse body, and the air exchange efficiency of the device is improved.

Description

Technical Field

[0001] The invention relates to the technical field of wood storage, in particular to an automated three-dimensional warehouse for raw materials used in bed processing. Background Art

[0002] Automated high-bay warehouses (AHWs) are a new concept in logistics and warehousing. Using AHW equipment, they streamline warehouse levels, automate storage and retrieval, and simplify operations. AHWs represent a state-of-the-art technology. The main components of an AHW are racks, aisle-mounted stacking cranes, a loading platform, and an automated transport and operation control system. Racks are steel or reinforced concrete structures containing standard-sized cargo spaces. Aisle-mounted stacking cranes navigate the aisles between the racks, storing and retrieving goods.

[0003] Chinese patent CN117735140B, authorized and announced on October 8, 2024, discloses an automated high-bay warehouse, which includes: a warehouse body, a plurality of first shelves and a plurality of adjustable cantilever shelves arranged at equal intervals in the warehouse body, a plurality of stacking cranes arranged in the warehouse body and respectively located between the plurality of first shelves and the plurality of adjustable cantilever shelves, an automatic conveying system arranged in the warehouse body and located outside the plurality of stacking cranes, and a plurality of partition mechanisms arranged on the plurality of first shelves.

[0004] In the above application documents, space utilization is improved and space occupancy is reduced so that it can cope with various types of warehousing needs. However, for some warehouses that store raw materials such as wood for bed processing, when used in relatively humid areas, there is a possibility that the wood in the warehouse will become damp. At this time, it is often necessary to discharge the humid air in the warehouse and introduce dry air. When dry air is directly introduced, the efficiency is low, which affects the use of the warehouse. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the present invention provides an automated three-dimensional warehouse for raw materials used in bed processing, which solves the problems raised in the above background technology. To achieve the above purpose, the present invention is implemented through the following technical solutions: an automated three-dimensional warehouse for raw materials used in bed processing, comprising: A warehouse body, wherein a conveyor for conveying wood is provided inside the warehouse body; An air intake duct and an exhaust duct, the air intake duct and the exhaust duct are respectively assembled on both sides of the warehouse body; The inner wall of the warehouse body is rotatably connected to a first rotating rod, the top of which is equipped with a wind wheel. The inner wall of the warehouse body is rotatably connected to a second rotating rod, the outer side of which is equipped with a transverse guide plate. A transmission member for transmission is installed between the transverse guide plate and the wind wheel. The interior of the warehouse body is equipped with an auxiliary guide assembly for improving air intake efficiency, and the interior of the warehouse body is equipped with a cleaning assembly for cleaning debris. Through the configuration of the device, dry air can be directed to various locations within the warehouse body during re-ventilation, thereby improving the ventilation efficiency of the device.

[0006] Preferably, the transmission member includes a bevel gear 1 assembled on the outside of a rotating rod 1, the inner wall of the warehouse body is rotatably connected to a torsion spring rod 1, the side of the torsion spring rod 1 is equipped with a bevel gear 2, the outside of the torsion spring rod 1 is fixedly connected to a sprocket 1, the outside of the sprocket 1 is equipped with a chain, and the outside of the rotating rod 2 is fixedly connected to a sprocket 2.

[0007] Preferably, only half of the teeth are provided on the outer side of the bevel gear 1, and the bevel gear 1 can be meshed with the bevel gear 2 through the teeth.

[0008] Preferably, one end of the chain away from the sprocket one is assembled on the outer side of the sprocket two.

[0009] Preferably, the auxiliary flow guide assembly includes a third and fourth rotating rods rotatably connected to the side surfaces of the transverse flow guide plates. The side surface of the third rotating rod is fixedly connected to a first gear. The inner wall of the warehouse body is fixedly connected to a ring gear. The outer side of the third rotating rod is fixedly connected to a third bevel gear. The side surface of the fourth rotating rod is fixedly connected to a fourth bevel gear. The outer side of the fourth rotating rod is fixedly connected to a longitudinal flow guide plate. The provision of the auxiliary flow guide assembly further enhances the flow guide effect of the device, thereby improving ventilation efficiency.

[0010] Preferably, the ring gear is located outside the gear one and is in meshing state with the gear one.

[0011] Preferably, the bevel gear four is located on the side of the bevel gear three and is in meshing state with the bevel gear three.

[0012] Preferably, the cleaning assembly includes an elastic cam fixedly connected to the outside of a torsion spring rod. The inner wall of the warehouse body is fixedly connected to a hydraulic chamber, one end of which is slidably connected to a force-bearing rod via a piston, and the other end of which is slidably connected to an arcuate rod via a piston. The inner wall of the warehouse body is rotatably connected to a second torsion spring rod, the outer sides of which are respectively fixedly connected to a force-bearing plate and a cleaning brush. The side of the exhaust duct is equipped with a filter plate. By configuring the cleaning assembly, wood debris attached to the surface of the filter plate can be cleaned, reducing the frequency of manual cleaning of the filter plate and making the device easier to use.

[0013] Preferably, the force-bearing rod is located at a side position of the elastic cam and is in contact with the elastic cam.

[0014] Preferably, the force-bearing plate is located at the bottom of the arc-shaped rod and is fixed to the arc-shaped rod.

[0015] The present invention provides an automated three-dimensional warehouse for raw materials used in bed processing. It has the following beneficial effects: (1) The automated three-dimensional warehouse for raw materials used in bed processing uses an air pump to introduce dry air into the warehouse body from the air inlet duct and discharge relatively humid air through the exhaust duct. In conjunction with the rotating rod 1, the wind wheel, the bevel gear 1, the torsion spring rod 1, the bevel gear 2, the sprocket 1, the chain, the rotating rod 2 and the sprocket 2, the transverse guide plate rotates back and forth, directing the dry air to various positions in the warehouse body, thereby improving the ventilation efficiency of the device.

[0016] (2) In the automated three-dimensional warehouse for raw materials used in bed processing, when the transverse guide plate rotates back and forth, gear one rotates back and forth along with it, and cooperates with rotating rod three, gear ring, bevel gear three, rotating rod four and bevel gear four, so that when the transverse guide plate rotates back and forth, the longitudinal guide plates on both sides rotate back and forth synchronously, further improving the diversion effect of the device and thus improving the ventilation efficiency.

[0017] (3) The machine is equipped with an automated three-dimensional warehouse for raw materials. When the torsion spring rod 1 is in a reciprocating state, it can drive the elastic cam to reciprocate. Together with the hydraulic warehouse, the force rod, the arc rod, the torsion spring rod 2, the force plate and the cleaning brush, the wood debris attached to the surface of the filter plate can be cleaned, reducing the frequency of manual cleaning of the filter plate and making the device easier to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of some parts of the present invention; Figure 2 It is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention; Figure 3This is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention from another perspective; Figure 4 It is a schematic diagram of the three-dimensional structure of some parts of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the auxiliary diversion component of the present invention; Figure 6 A schematic diagram of the three-dimensional structure of some parts of the auxiliary guide assembly of the present invention; Figure 7 A schematic diagram of the three-dimensional structure of the cleaning component of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of some parts of the cleaning assembly of the present invention.

[0019] In the picture: 100, Warehouse body; 200, Air intake duct; 300, Exhaust duct; 401, Rotating rod 1; 402, Wind wheel; 403, Bevel gear 1; 404, Torsion spring rod 1; 405, Bevel gear 2; 406, Sprocket 1; 407, Chain; 408, Rotating rod 2; 409, Sprocket 2; 410, Horizontal guide plate; 500, auxiliary guide assembly; 501, rotating rod three; 502, gear one; 503, ring gear; 504, bevel gear three; 505, rotating rod four; 506, bevel gear four; 507, longitudinal guide plate; 600, cleaning assembly; 601, elastic cam; 602, hydraulic chamber; 603, force rod; 604, arc rod; 605, torsion spring rod 2; 606, force plate; 607, cleaning brush; 608, filter plate. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] For example 1, please refer to Figure 1-Figure 4 , an automated three-dimensional warehouse for raw materials used in bed processing, comprising: The warehouse body 100 has a conveyor for transporting wood inside the warehouse body 100; The air intake duct 200 and the exhaust duct 300 are respectively assembled on both sides of the warehouse body 100; The inner wall of the warehouse body 100 is rotatably connected to a rotating rod 1 401, with a wind wheel 402 mounted on top of the rotating rod 1 401. A rotating rod 2 408 is rotatably connected to the inner wall of the warehouse body 100, with a transverse guide plate 410 mounted on the outer side of the rotating rod 2 408. A transmission member for transmission is mounted between the transverse guide plate 410 and the wind wheel 402. The transmission member includes a bevel gear 1 403 mounted on the outer side of the rotating rod 1 401. When the air pump is activated, dry air is introduced into the warehouse body 100 from the air intake duct 200 and relatively moist air is discharged through the exhaust duct 300. At this time, the rapidly flowing dry air drives the wind wheel 402 to rotate, causing the wind wheel 402 to rotate the rotating rod 1 401 fixedly connected thereto, which in turn drives the bevel gear 1 403 fixedly connected thereto.

[0022] The inner wall of the warehouse body 100 is rotatably connected to a torsion spring rod 1 404. The side of the torsion spring rod 1 404 is equipped with a bevel gear 2 405. The outer side of the bevel gear 1 403 is only provided with half of the teeth, through which the bevel gear 1 403 can mesh with the bevel gear 2 405. When the half of the teeth on the bevel gear 1 403 rotate to a state of meshing with the bevel gear 2 405, the bevel gear 1 403 drives the meshed bevel gear 2 405 to rotate, and the bevel gear 2 405 drives the torsion spring rod 1 404 fixed to it to rotate. When the side of the bevel gear 1 403 without teeth rotates to the bevel gear 2 405, the bevel gear 2 405 and the torsion spring rod 1 404 are freed from the restraint, and the torsion spring rod 1 404 can rotate in the opposite direction under its own action and reset. In this way, the torsion spring rod 1 404 can be put into a reciprocating rotation state.

[0023] The outer side of the torsion spring rod 1 404 is fixedly connected to a sprocket 1 406. A chain 407 is mounted on the outer side of the sprocket 1 406. The outer side of the rotating rod 2 408 is fixedly connected to a sprocket 2 409. The end of the chain 407, which is away from the sprocket 1 406, is mounted on the outer side of the sprocket 2 409. When the torsion spring rod 1 404 is in a reciprocating rotation state, it can drive the sprocket 1 406 fixed thereto to rotate reciprocally. In conjunction with the chain 407 mounted on the outer side of the sprocket 1 406, the sprocket 2 409, which is connected to the sprocket 1 406 through the chain 407, can rotate reciprocally. The sprocket 2 409 then drives the rotating rod 2 408 fixed thereto to rotate reciprocally. The rotating rod 2 408 drives the transverse guide plate 410 mounted on the outer side of the rotating rod 2 408 to rotate reciprocally, thereby guiding the dry air introduced through the air intake duct 200 to various locations within the warehouse body 100, thereby improving the ventilation efficiency of the device.

[0024] When in use, the air pump is activated to introduce dry air into the warehouse body 100 from the air inlet duct 200, and the relatively humid air is discharged through the exhaust duct 300. At this time, the fast-flowing dry air drives the wind wheel 402 to rotate, so that the wind wheel 402 drives the rotating rod 1 401 fixedly connected to it to rotate, and the rotating rod 1 401 randomly drives the bevel gear 1 403 fixedly connected to it to rotate. When half of the teeth on the bevel gear 1 403 rotate to a state of meshing with the bevel gear 2 405, the bevel gear 1 403 drives the bevel gear 2 405 meshed with it to rotate, and the bevel gear 2 405 drives the torsion spring rod 1 404 fixedly connected to it to rotate. When the side of the bevel gear 1 403 without teeth rotates to the bevel gear 2 When the gear is at position 405, the bevel gear 2 405 and the torsion spring rod 1 404 lose their restrictions, and the torsion spring rod 1 404 can rotate in the opposite direction under its own action and be reset. In this way, the torsion spring rod 1 404 can be in a reciprocating rotation state, driving the sprocket 1 406 fixedly connected to it to rotate reciprocatingly, and cooperating with the chain 407 assembled on the outside of the sprocket 1 406, so that the sprocket 2 409 connected to the sprocket 1 406 through the chain 407 rotates reciprocatingly, and the sprocket 2 409 then drives the rotating rod 2 408 fixedly connected to it to rotate reciprocatingly, so that the rotating rod 2 408 drives the horizontal guide plate 410 assembled on the outside thereof to rotate reciprocatingly, and the dry air introduced through the air intake duct 200 is diverted to various positions in the warehouse body 100.

[0025] For example 2, please refer to Figures 1-6 Based on the first embodiment, the interior of the warehouse body 100 is equipped with an auxiliary air guide assembly 500 for improving air intake efficiency. The auxiliary air guide assembly 500 includes a rotating rod 3 501 and a rotating rod 4 505 rotatably connected to the side of the transverse air guide plate 410. A gear 1 502 is fixedly connected to the side of the rotating rod 3 501. A ring gear 503 is fixedly connected to the inner wall of the warehouse body 100. The ring gear 503 is located outside the gear 1 502 and is in meshing engagement with the gear 1 502. When the transverse air guide plate 410 reciprocates, the gear 1 502, which is mounted on the transverse air guide plate 410 via the rotating rod 3 501, reciprocates along with it. During the reciprocating revolution of the gear 1 502, it is restrained by the ring gear 503 meshing with the gear 1 502, causing the gear 1 502 to reciprocate synchronously. The gear 1 502 then drives the rotating rod 3 501, which is fixedly connected to it, to reciprocate.

[0026] Bevel gear 3 504 is fixedly connected to the outside of rotating rod 3 501, and bevel gear 4 506 is fixedly connected to the side of rotating rod 4 505. Bevel gear 4 506 is located on the side of bevel gear 3 504 and is in meshing state with bevel gear 3 504. A longitudinal guide plate 507 is fixedly connected to the outside of rotating rod 4 505. When rotating rod 3 501 rotates back and forth, rotating rod 3 501 drives bevel gear 3 504 fixedly connected to it to rotate back and forth. Bevel gear 3 504 drives bevel gear 4 506 meshed with it to rotate back and forth, which in turn drives bevel gear 4 506 to drive rotating rod 4 505 fixedly connected to it to rotate back and forth. Rotating rod 4 505 then drives the longitudinal guide plate 507 mounted on its outside to rotate back and forth. As the transverse guide plate 410 reciprocates, the longitudinal guide plates 507 on both sides also reciprocate synchronously, further improving the diversion effect of the device and thereby improving the ventilation efficiency.

[0027] When in use, based on Example 1, when the transverse guide plate 410 rotates back and forth and is in a reciprocating rotation state, the gear 1 502 assembled on the transverse guide plate 410 through the rotating rod 3 501 rotates back and forth therewith, and in the process of the reciprocating revolution of the gear 1 502, it is restricted by the ring gear 503 meshing with the gear 1 502, so that the gear 1 502 rotates back and forth synchronously, and the gear 1 502 then drives the rotating rod 3 501 fixedly connected thereto to rotate back and forth, so that the rotating rod 3 501 drives the bevel gear 3 504 fixedly connected thereto to rotate back and forth, and the bevel gear 3 504 drives the bevel gear 4 506 meshing therewith to rotate back and forth, so that the bevel gear 4 506 drives the rotating rod 4 505 fixedly connected thereto to rotate back and forth, and the rotating rod 4 505 then drives the longitudinal guide plate 507 assembled on its outside to rotate back and forth, so that in the process of the reciprocating rotation of the transverse guide plate 410, the longitudinal guide plates 507 on both sides rotate back and forth synchronously.

[0028] For example three, please refer to Figures 1-8 Based on the first and second embodiments, the interior of the warehouse body 100 is equipped with a cleaning assembly 600 for cleaning debris. The cleaning assembly 600 includes an elastic cam 601 fixedly connected to the outside of the torsion spring rod 1 404. A hydraulic chamber 602 is fixedly connected to the inner wall of the warehouse body 100. One end of the hydraulic chamber 602 is slidably connected to a force-bearing rod 603 via a piston. The force-bearing rod 603 is located to the side of the elastic cam 601 and contacts the elastic cam 601. When the torsion spring rod 1 404 is in a reciprocating state, it can drive the elastic cam 601 fixedly connected to the torsion spring rod 1 404 to reciprocate. During the reciprocating rotation of the elastic cam 601, when the protruding portion of the elastic cam 601 rotates to the force-bearing rod 603, it can squeeze the force-bearing rod 603, causing the force-bearing rod 603 to move sideways.

[0029] The other end of the hydraulic warehouse 602 is connected to the arc rod 604 by setting a piston slidingly. The inner wall of the warehouse body 100 is rotatably connected to the torsion spring rod 2 605. The outer sides of the torsion spring rod 2 605 are respectively fixedly connected with the force plate 606 and the cleaning brush 607. The force plate 606 is located at the bottom position of the arc rod 604 and is in a fixed state with the arc rod 604. The side of the exhaust duct 300 is equipped with a filter plate 608. When the force-bearing rod 603 moves sideways, it can push the oil in the hydraulic chamber 602 which is slidably connected to the force-bearing rod 603 by setting a piston, so that the oil originally stored in the hydraulic chamber 602 moves to the side away from the force-bearing rod 603, squeezing and pushing the arc rod 604, so that the arc rod 604 extends out of the hydraulic chamber 602, driving the force-bearing plate 606 fixedly connected to the arc rod 604 to rotate, so that the force-bearing plate 606 drives the torsion spring rod 2 605 fixedly connected to it to rotate, and when the protruding part of the elastic cam 601 moves away from the force-bearing rod 603 as it rotates, the torsion spring rod 2 605 immediately loses its restriction and rotates in the opposite direction under its own action to reset. In this way, the torsion spring rod 2 605 can rotate back and forth, driving the cleaning brush 607 assembled on the side of the torsion spring rod 2 605 to rotate back and forth, cleaning the filter plate 608 on the exhaust pipe 300, reducing the frequency of manual cleaning of the filter plate 608, and making the device easier to use.

[0030] During use, on the basis of the first and second embodiments, when the torsion spring rod 404 is in a reciprocating rotation state, it can drive the elastic cam 601 fixedly connected to the torsion spring rod 404 to reciprocate, and in the process of the reciprocating rotation of the elastic cam 601, when the protruding part of the elastic cam 601 rotates to the force-bearing rod 603, it can squeeze the force-bearing rod 603, so that the force-bearing rod 603 moves to the side, thereby pushing the oil in the hydraulic tank 602 which is slidably connected to the force-bearing rod 603 by setting a piston, so that the oil originally stored in the hydraulic tank 602 moves to the side away from the force-bearing rod 603, squeezing and Push the arc rod 604 so that the arc rod 604 extends out from the hydraulic chamber 602, driving the force-bearing plate 606 fixedly connected to the arc rod 604 to rotate, so that the force-bearing plate 606 drives the torsion spring rod 2 605 fixedly connected to it to rotate. When the protruding part of the elastic cam 601 moves away from the force-bearing rod 603 as it rotates, the torsion spring rod 2 605 immediately loses its restriction and rotates in the opposite direction under its own action to reset. In this way, the torsion spring rod 2 605 can rotate back and forth, driving the cleaning brush 607 assembled on the side of the torsion spring rod 2 605 to rotate back and forth, thereby cleaning the filter plate 608 on the exhaust pipe 300.

[0031] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An automated three-dimensional warehouse for raw materials used in bed processing, characterized in that: include: A warehouse body, wherein a conveyor for conveying wood is provided inside the warehouse body; An air intake duct and an exhaust duct, the air intake duct and the exhaust duct are respectively assembled on both sides of the warehouse body; The inner wall of the warehouse body is rotatably connected to a rotating rod 1, and a wind wheel is installed on the top of the rotating rod 1. The inner wall of the warehouse body is rotatably connected to a rotating rod 2, and a transverse guide plate is installed on the outer side of the rotating rod 2. A transmission part for transmission is installed between the transverse guide plate and the wind wheel. The interior of the warehouse body is equipped with an auxiliary guide component for improving the air intake efficiency, and the interior of the warehouse body is equipped with a cleaning component for cleaning debris.

2. The automated three-dimensional warehouse for raw materials used in bed processing according to claim 1, characterized in that: The transmission part includes a bevel gear 1 assembled on the outside of a rotating rod 1, a torsion spring rod 1 is rotatably connected to the inner wall of the warehouse body, a bevel gear 2 is assembled on the side of the torsion spring rod 1, a sprocket 1 is fixedly connected to the outside of the torsion spring rod 1, a chain is assembled on the outside of the sprocket 1, and a sprocket 2 is fixedly connected to the outside of the rotating rod 2.

3. The automated three-dimensional warehouse for raw materials used in bed processing according to claim 2, characterized in that: Only half of the teeth are provided on the outer side of the bevel gear 1, and the bevel gear 1 can be meshed with the bevel gear 2 through the teeth.

4. The automated three-dimensional warehouse for raw materials used in bed processing according to claim 2, characterized in that: One end of the chain away from the first sprocket is assembled on the outer side of the second sprocket.

5. The automated three-dimensional warehouse for raw materials used in bed processing according to claim 2, characterized in that: The auxiliary guide assembly includes a rotating rod three and a rotating rod four rotatably connected to the side of the horizontal guide plate, the side of the rotating rod three is fixedly connected to a gear one, the inner wall of the warehouse body is fixedly connected to a gear ring, the outer side of the rotating rod three is fixedly connected to a bevel gear three, the side of the rotating rod four is fixedly connected to a bevel gear four, and the outer side of the rotating rod four is fixedly connected to the longitudinal guide plate.

6. The automated three-dimensional warehouse for raw materials used in bed processing according to claim 5, characterized in that: The ring gear is located outside the first gear and is in meshing engagement with the first gear.

7. The automated three-dimensional warehouse for raw materials used in bed processing according to claim 5, characterized in that: The bevel gear four is located on the side of the bevel gear three and is in meshing state with the bevel gear three.

8. The automated three-dimensional warehouse for raw materials used in bed processing according to claim 5, characterized in that: The cleaning assembly includes an elastic cam fixedly connected to the outside of a torsion spring rod, the inner wall of the warehouse body is fixedly connected to a hydraulic warehouse, one end of the hydraulic warehouse is slidably connected to a force rod by setting a piston, and the other end of the hydraulic warehouse is slidably connected to an arc rod by setting a piston, the inner wall of the warehouse body is rotatably connected to a torsion spring rod 2, the outer sides of the torsion spring rod 2 are respectively fixedly connected to a force plate and a cleaning brush, and a filter plate is assembled on the side of the exhaust pipe.

9. The automated three-dimensional warehouse for raw materials used in bed processing according to claim 8, characterized in that: The force-bearing rod is located at a side position of the elastic cam and is in contact with the elastic cam.

10. The automated three-dimensional warehouse for raw materials used in bed processing according to claim 8, characterized in that: The force-bearing plate is located at the bottom of the arc-shaped rod and is in a fixed state with the arc-shaped rod.

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