An automatic processing system for angle steel

CN119388159BActive Publication Date: 2025-03-18山东省青腾机械科技有限公司
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Patent Information

Application Number
CN202411990730.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-31
Publication Date
2025-03-18
Estimated Expiration
2044-12-31

AI Technical Summary

Technical Problem

In the prior art, it is necessary to replace the drill bit according to the required hole size of the angle steel, resulting in a lower processing efficiency.

Method used

An angle steel automatic processing system is designed, using threaded rods and nuts to adjust the position of the reaming arc plate and grinding arc plate through the motor to realize automatic adjustment of the drilling tool and reduce the tool change time.

Benefits of technology

Improve production efficiency, enhance the accuracy of hole punching and the finish of the hole inner wall, and extend the service life of the hole punching knife.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of angle steel processing, and specifically provides an automated processing system for angle steel, including a base plate and a support frame fixed on the base plate, a lifting mechanism is installed on the support frame, the lifting mechanism is connected to a fixed shell, a first motor is fixed on the fixed shell, the first motor is connected to a spindle head, the spindle head is drive-connected to a punching knife, the punching knife includes a tool handle coaxially fixed to the spindle head, the tool handle is coaxially fixed to a tool body, the tool body is coaxially fixed to a tool cone head, a second motor is fixed in the tool handle, the second motor is drive-connected to a hole-expanding arc plate, the hole-expanding arc plate is annularly arranged outside the tool body, and the second motor can drive the hole-expanding arc plate to move away from or approach the tool body; the invention adjusts the overall punching size of the punching knife by changing the position of the grinding arc plate and the hole-expanding arc plate, thereby reducing the time for tool changing and auxiliary operations and improving production efficiency.
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Description

Technical Field

[0001] The invention relates to the technical field of angle steel processing, and specifically provides an angle steel automated processing system. Background Art

[0002] Angle steel, commonly known as angle iron, is a long steel strip with two sides perpendicular to each other. In the process of using angle steel, in order to facilitate the connection with other components, such as connecting with beams, columns and other components through bolts, it is usually necessary to punch holes on the outside of the angle steel.

[0003] Different angle steels or different positions of the same angle steel may need to process circular holes of different diameters. This requires selecting a suitable drill bit according to the hole size required by the angle steel. This means that workers need to frequently replace different drill bits to process different hole diameters, making the drilling work cumbersome and affecting the drilling efficiency. Summary of the invention

[0004] In view of the above-mentioned defects, the present invention provides an automated angle steel processing system, the purpose of which is to solve the problem in the prior art that the processing efficiency is slowed down due to the need to replace a suitable drill bit according to the hole size required for the angle steel.

[0005] In order to achieve the above-mentioned purpose, the present invention provides an automated processing system for angle steel, which includes a base plate and a support frame fixed on the base plate, a lifting mechanism is installed on the support frame, the lifting mechanism is connected to a fixed shell, a first motor is fixed on the fixed shell, the first motor is connected to a spindle head with a transmission, the spindle head is rotatably installed on the fixed shell, the spindle head is drive-connected to a punching knife, the punching knife includes a tool handle coaxially fixed to the spindle head, the tool handle is coaxially fixed to a tool body, the tool body is coaxially fixed to a tool cone head, a second motor is fixed in the tool handle, the second motor is drive-connected to a hole-expanding arc plate, the hole-expanding arc plate is annularly arranged outside the tool body, and the second motor can drive the hole-expanding arc plate away from or close to the tool body.

[0006] Preferably, the second motor is coaxially fixed with the threaded rod, and the threaded rod is rotatably installed in the cutter body. The threaded rod includes a forward rotating part and a reverse rotating part with opposite thread rotation directions. A first nut is provided on the outer side of the forward rotating part, and a second nut is provided on the outer side of the reverse rotating part. The first nut is hinged to the grinding arc plate through a first connecting rod, and the second nut is hinged to the grinding arc plate through a second connecting rod. The grinding arc plate is fixedly connected to the reaming arc plate.

[0007] Preferably, the knife body is annularly provided with four long through holes, the outer wall of the first nut is hinged to one end of four first connecting rods, the other ends of the four first connecting rods pass through the long through holes and are respectively hinged to the upper parts of the inner walls of four grinding arc plates, the outer wall of the second nut is hinged to one end of four second connecting rods, the other ends of the four second connecting rods pass through the long through holes and are respectively hinged to the rear parts of the inner walls of the four grinding arc plates, and the four grinding arc plates are respectively fixedly connected to the four expanding hole arc plates.

[0008] Preferably, an oil storage cylinder is fixed inside the cutter body, a first one-way valve is installed on the oil storage cylinder, the oil storage cylinder is connected to and communicated with one end of four first oil pipes, the other ends of the four first oil pipes are respectively slidably connected with second oil pipes, one end of the second oil pipe is installed with a second one-way valve, the other end of the second oil pipe passes through the grinding arc plate and extends to the outside of the grinding arc plate, and the outer wall of the second oil pipe is fixedly connected to the grinding arc plate.

[0009] Preferably, a plurality of grinding edges are fixed on the outer wall of the grinding arc plate.

[0010] Preferably, the lifting mechanism includes a lifting seat fixed on the support frame, a third motor is fixed on the lifting seat, the output shaft of the third motor is coaxially fixed with a lead screw, the lead screw is rotatably mounted on the lifting seat, the lead screw is threadedly connected to the fixed shell, two guide blocks are fixed on the fixed shell, the guide blocks are slidably matched with guide rods, and the guide rods are fixed on the lifting seat.

[0011] Preferably, a bending plate is fixed on the support frame, a cylinder is fixed on the bending plate, and an output end of the cylinder is fixedly connected to the abutment joint.

[0012] Preferably, a first processing seat and a second processing seat are fixed on the bottom plate, the first processing seat and the second processing seat can jointly bear the angle steel, and a limiting seat is fixed on the second processing seat.

[0013] Preferably, the second oil pipeline is a "Z"-shaped pipe.

[0014] Preferably, the support frame includes a vertical frame arranged vertically and an inclined frame arranged obliquely, one end of the vertical frame is fixed to the upper end surface of the base plate, the other end of the vertical frame is fixedly connected to one end of the inclined frame, and the other end of the inclined frame is fixedly connected to the base plate.

[0015] The object of the present invention is to provide an automatic processing system for angle steel, which has the following beneficial effects:

[0016] ① The present invention changes the positions of the grinding arc plate and the hole-expanding arc plate by arranging a threaded rod to cooperate with the first nut and the second nut, adjusts the overall punching size of the punching knife, reduces the time for tool changing and auxiliary operations, and improves production efficiency.

[0017] ② The present invention arranges the cone head to contact the angle steel first to process a guide hole, then four hole-expanding arc plates contact the angle steel to process the guide hole into a through hole, and finally the grinding edge on the grinding arc plate contacts the inner wall of the through hole to remove burrs, debris and sharp edges on the inner wall of the through hole; the entire punching process improves the punching accuracy and the smoothness of the inner wall of the hole.

[0018] ③ The present invention arranges an oil storage cylinder to cooperate with the first oil pipeline and the second oil pipeline. Each time the diameter changes, the cutting oil in the oil storage cylinder is sucked out to the surface of the punching knife, which helps to reduce burrs and scratches on the inner wall surface of the hole and improve the smoothness of the processed surface. On the other hand, the cutting fluid can reduce friction and increase the service life of the punching knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axonometric view of an automated angle steel processing system;

[0020] Figure 2 It is a schematic diagram of the structure of the punching knife in the present invention;

[0021] Figure 3 It is an exploded schematic diagram of the punching knife in the present invention;

[0022] Figure 4 yes Figure 3 A magnified view of the structure at center A;

[0023] Figure 5 It is a structural schematic diagram of the oil storage cylinder in the present invention;

[0024] Figure 6 It is a partial axonometric drawing of the present invention from the first viewing angle.

[0025] In the figure: 1-bottom plate; 2-support frame; 221-vertical frame; 222-tilt frame; 10-fixed shell; 11-first motor; 110-first pulley; 111-second pulley; 112-belt; 12-spindle head; 13-tool handle; 14-tool body; 15-tool cone head; 20-second motor; 21-expanding arc plate; 3-threaded rod; 31-forward rotation part; 32-reverse rotation part; 33-first nut; 34-second nut; 35-second A connecting rod; 36-grinding arc plate; 37-second connecting rod; 40-long through hole; 50-oil storage cylinder; 51-first one-way valve; 52-first oil pipeline; 53-second oil pipeline; 54-second one-way valve; 60-grinding edge; 70-lifting seat; 71-third motor; 72-screw; 73-guide block; 74-guide rod; 80-bending plate; 81-cylinder; 82-butt joint; 90-first processing seat; 91-second processing seat; 92-limit seat. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] like Figure 1-Figure 6 As shown, an angle steel automated processing system comprises a base plate 1 and a support frame 2 fixed on the upper surface of the base plate 1. The support frame 2 is divided into a vertical frame 221 arranged vertically and an inclined frame 222 arranged obliquely, one end of the vertical frame 221 is fixed to the upper end surface of the base plate 1, the other end of the vertical frame 221 is fixedly connected to one end of the inclined frame 222, and the other end of the inclined frame 222 is fixedly connected to the base plate 1.

[0028] A lifting mechanism is installed on the vertical frame 221 of the support frame 2, and the lifting mechanism is connected to the fixed shell 10 and can drive the fixed shell 10 to rise or fall. A first motor 11 is fixed on the fixed shell 10, and the first motor 11 is connected to the main shaft head 12 with a belt transmission. Specifically, the output shaft of the first motor 11 is coaxially fixed with the first pulley 110, the main shaft head 12 is coaxially fixed with the second pulley 111, and the first pulley 110 is connected to the second pulley 111 with a belt transmission via a belt 112; the first pulley 110 and the second pulley 111 are both rotatably installed on the fixed shell 10, and the diameter of the first pulley 110 is larger than the diameter of the second pulley 111.

[0029] The spindle head 12 is rotatably mounted on the fixed shell 10, the upper end of the spindle head 12 is fixed to the second pulley 111, the lower end of the spindle head 12 is located below the fixed shell 10, and the lower end of the spindle head 12 is connected to the punching knife. Specifically, the punching knife includes a handle 13 coaxially fixed to the spindle head 12, the handle 13 is coaxially fixed to the cutter body 14, the cutter body 14 is coaxially fixed to the cutter cone 15, and the cutter cone 15 is roughly an inverted cone. During processing, the cutter cone 15 first contacts the angle steel to process a guide hole. A second motor 20 is fixed inside the handle 13, and the second motor 20 is connected to the hole expansion arc plate 21. The hole expansion arc plate 21 is arranged in an annular manner outside the cutter body 14, and the lower end surface of the hole expansion arc plate 21 overlaps the upper end surface of the cutter cone 15. The second motor 20 can drive the hole expansion arc plate 21 away from or close to the cutter body 14.

[0030] Preferably, the number of the reaming arc plates 21 is four, and the four reaming arc plates 21 are arranged in a ring around the blade body 14. When the reaming arc plates 21 are closest to the blade body 14, they can be aligned to form a truncated cone.

[0031] As a further explanation of this embodiment, the output shaft of the second motor 20 is coaxially fixed with the threaded rod 3 and drives the threaded rod 3 to rotate. The threaded rod 3 is rotatably installed in the cutter body 14, and the threaded rod 3 is coaxially arranged with the cutter body 14. The threaded rod 3 includes a forward rotation part 31 and a reverse rotation part 32 with opposite thread rotation directions. The outer side of the forward rotation part 31 is provided with a first nut 33, and the outer side of the reverse rotation part 32 is provided with a second nut 34. The first nut 33 is hinged to the grinding arc plate 36 through a first connecting rod 35, and the second nut 34 is hinged to the grinding arc plate 36 through a second connecting rod 37. The lower end surface of the grinding arc plate 36 is fixedly connected to the upper end surface of the hole expansion arc plate 21.

[0032] As a further explanation of the present embodiment, the blade body 14 is provided with four long through holes 40 in a ring shape, and the four long through holes 40 are provided in a ring shape at an interval of 90°. The first nut 33 is a rectangular nut, and the four outer walls of the first nut 33 are respectively hinged to one end of four first connecting rods 35, and the other ends of the four first connecting rods 35 pass through the long through holes 40 and are respectively hinged to the upper parts of the inner walls of the four grinding arc plates 36. The second nut 34 is also a rectangular nut, and the four outer walls of the second nut 34 are respectively hinged to one end of four second connecting rods 37, and the other ends of the four second connecting rods 37 pass through the long through holes 40 and are respectively hinged to the lower parts of the inner walls of the four grinding arc plates 36, and the four grinding arc plates 36 are respectively fixedly connected to the four hole-expanding arc plates 21.

[0033] It should be noted that the width of the first connecting rod 35 and the second connecting rod 37 is the same as the long through hole 40, so that the rotation of the threaded rod 3 will not drive the first nut 33 and the second nut 34 to rotate. The long through hole 40 is an upper deviation, and the first connecting rod 35 and the second connecting rod 37 are a lower deviation, so that there is a certain fitting gap between the two.

[0034] As a further explanation of the present embodiment, an oil storage cylinder 50 is fixed to the upper portion of the interior of the cutter body 14, and a first one-way valve 51 is installed near the upper end of the oil storage cylinder 50, and the lower portion of the oil storage cylinder 50 is connected to and communicated with one end of four first oil pipes 52, and the four first oil pipes 52 are evenly arranged in a ring outside the oil storage cylinder 50, and the other ends of the four first oil pipes 52 are respectively slidably connected to second oil pipes 53. Specifically, the inner wall of the first oil pipe 52 and the outer wall of the second oil pipe 53 are connected in a sliding seal, and a second one-way valve 54 is installed at one end of the second oil pipe 53, and the other end of the second oil pipe 53 passes through the polishing arc plate 36 and extends to the outside of the polishing arc plate 36, and the outer wall of the second oil pipe 53 is fixedly connected to the polishing arc plate 36.

[0035] Among them, the second oil pipe 53 is a "Z"-shaped pipe. Considering that the second oil pipe 53 will rotate under the drive of the first motor 11, the second oil pipe 53 is set to be "Z"-shaped to prevent the cutting oil in the oil storage cylinder 50 from being thrown out along the second oil pipe 53 under the action of centrifugal force.

[0036] As a further explanation of this embodiment, a plurality of grinding edges 60 are fixed to the outer wall of the grinding arc plate 36 .

[0037] As a further explanation of this embodiment, the lifting mechanism includes a lifting seat 70 fixed on the vertical frame 221, a third motor 71 is fixed on the lifting seat 70, the output shaft of the third motor 71 is coaxially fixed with a lead screw 72, the lead screw 72 is rotatably mounted on the lifting seat 70, the lead screw 72 is threadedly connected to the fixed shell 10, specifically, the fixed shell 10 is provided with a matching hole, a thread matching the thread of the lead screw 72 is provided in the matching hole, two guide blocks 73 are fixed on the fixed shell 10, the two guide blocks 73 are located on both sides of the matching hole, the guide blocks 73 are slidably matched with the guide rod 74, and the guide rod 74 is fixed on the lifting seat 70.

[0038] As a further explanation of this embodiment, a bending plate 80 is fixed on the tilting frame 222 of the support frame 2 , a cylinder 81 is fixed on the bending plate 80 , and an output end of the cylinder 81 is fixedly connected to the abutment head 82 .

[0039] As a further explanation of this embodiment, a first processing seat 90 and a second processing seat 91 are fixed on the base plate 1. There is a distance between the first processing seat 90 and the second processing seat 91. The first processing seat 90 and the second processing seat 91 can jointly support the angle steel. A limited seat 92 is fixed on the second processing seat 91.

[0040] When using the device to punch holes in angle steel, the angle steel is first placed on the first processing seat 90 and the second processing seat 91, and then the cylinder 81 is started. The output head of the cylinder 81 pushes the abutment head 82 to move, and the abutment head 82 cooperates with the second processing seat 91 and the limit seat 92 to fix the angle steel.

[0041] Then, the second motor 20 is started, and the rotation of the second motor 20 drives the threaded rod 3 to rotate, that is, drives the forward rotation part 31 and the reverse rotation part 32 to rotate. The first nut 33 cooperates with the internal and external thread structures of the forward rotation part 31, and the rotation of the forward rotation part 31 can drive the first nut 33 to move upward or downward along the central axis of the threaded rod 3; similarly, the second nut 34 cooperates with the internal and external thread structures of the reverse rotation part 32, and the rotation of the reverse part 32 can drive the second nut 34 to move upward or downward along the central axis of the threaded rod 3; since the thread rotation directions of the forward rotation part 31 and the reverse rotation part 32 are opposite, the movement directions of the first nut 33 and the second nut 34 are opposite. When the first nut 33 moves upward, it drives the first connecting rod 35 and the end hinged to the first nut 33 to move upward. At this time, the second nut 34 moves downward, driving the second connecting rod 37 and the end hinged to the second nut 34 to move downward. The first connecting rod 35 and the second connecting rod 37 jointly drive the four grinding arc plates 36 to expand outward, specifically, to move away from the cutter body 14, thereby driving the four hole-expanding arc plates 21 to move away from the cutter body 14, thereby realizing the enlargement adjustment of the processable aperture.

[0042] Similarly, when the first nut 33 moves downward, it drives the first connecting rod 35 and the hinged end of the first nut 33 to move downward. At this time, the second nut 34 moves upward, driving the second connecting rod 37 and the hinged end of the second nut 34 to move upward. The first connecting rod 35 and the second connecting rod 37 jointly drive the four grinding arc plates 36 to shrink inward, specifically, to move in the direction close to the tool body 14, thereby driving the four hole expanding arc plates 21 to move in the direction close to the tool body 14, thereby realizing the smaller adjustment of the machinable aperture.

[0043] When the four grinding arc plates 36 move away from the cutter body 14, the second oil pipe 53 is driven to move away from the cutter body 14. At this time, the second one-way valve 54 is in a closed state, and the first one-way valve 51 is in an open state. The cutting oil in the oil reservoir 50 flows into the cavity of the first oil pipe 52, and the external air enters the oil reservoir 50 through the first one-way valve 51 to ensure the air pressure balance inside and outside the oil reservoir 50.

[0044] When the four grinding arc plates 36 move toward the direction close to the cutter body 14, the second oil pipe 53 is driven to move toward the cutter body 14. At this time, the second one-way valve 54 is in an open state, and the first one-way valve 51 is in a closed state. The movement of the second oil pipe 53 increases the pressure in the oil storage cylinder 50, so that the cutting oil in the first oil pipe 52 can enter the second oil pipe 53 through the second one-way valve 54, and then flow out from the outlet of the second oil pipe 53. After flowing out, the cutting oil flows downward along the side wall of the grinding arc plate 36.

[0045] After the adjustment is completed, the first motor 11 is started, and the output shaft of the first motor 11 drives the first pulley 110 to rotate, thereby driving the second pulley 111 to rotate, and further driving the spindle head 12 to rotate. The rotation of the spindle head 12 drives the rotation of the tool handle 13, the tool body 14 and the tool cone head 15, thereby driving the grinding arc plate 36 and the reaming arc plate 21 to revolve around the central axis of the tool body 14.

[0046] Then, the third motor 71 is started. The rotation of the third motor 71 drives the lead screw 72 to rotate, thereby driving the fixed shell 10 to move downward. The cone head 15 first contacts the angle steel to process a guide hole. Then, the four reaming arc plates 21 contact the angle steel to process the guide hole into a through hole. Finally, the grinding edge 60 on the grinding arc plate 36 contacts the inner wall of the through hole to remove burrs, debris and sharp edges on the inner wall of the through hole.

[0047] The present invention is not limited to the above-mentioned specific implementation modes. Various changes made by ordinary technicians in this field based on the above-mentioned concepts without creative work are all within the protection scope of the present invention.

Claims

1. An automatic processing system for angle steel, comprising a base plate (1) and a support frame (2) fixed on the base plate (1), characterized in that: The support frame (2) is provided with a lifting mechanism, the lifting mechanism is connected to the fixed shell (10), a first motor (11) is fixed to the fixed shell (10), the first motor (11) is connected to the spindle head (12) by a belt transmission, the spindle head (12) is rotatably mounted on the fixed shell (10), the spindle head (12) is connected to a punching knife by driving, the punching knife comprises a shank (13) fixed coaxially with the spindle head (12), the shank (13) is fixed coaxially with the knife body (14), the knife body (14) is fixed coaxially with the knife cone head (15), a second motor (20) is fixed in the shank (13), the second motor (20) is connected to a hole expansion arc plate (21) by driving, the hole expansion arc plate (21) is arranged in an annular manner outside the knife body (14), and the second motor (20) can drive the hole expansion arc plate (21) to move away from or close to the knife body (14); The second motor (20) is coaxially fixed to the threaded rod (3), the threaded rod (3) is rotatably mounted in the cutter body (14), the threaded rod (3) comprises a forward rotation portion (31) and a reverse rotation portion (32) having opposite thread rotation directions, a first nut (33) is provided on the outer side of the forward rotation portion (31), and a second nut (34) is provided on the outer side of the reverse rotation portion (32), the first nut (33) is hinged to the grinding arc plate (36) via a first connecting rod (35), the second nut (34) is hinged to the grinding arc plate (36) via a second connecting rod (37), and the grinding arc plate (36) is fixedly connected to the hole expanding arc plate (21); An oil storage cylinder (50) is fixed inside the cutter body (14), a first non-return valve (51) is installed on the oil storage cylinder (50), the oil storage cylinder (50) is connected to and communicates with one end of four first oil delivery pipes (52), the other ends of the four first oil delivery pipes (52) are respectively slidably connected to second oil delivery pipes (53), one end of the second oil delivery pipe (53) is installed with a second non-return valve (54), the other end of the second oil delivery pipe (53) passes through the grinding arc plate (36) and extends to the outside of the grinding arc plate (36), and the outer wall of the second oil delivery pipe (53) is fixedly connected to the grinding arc plate (36).

2. The angle steel automated processing system according to claim 1, characterized in that: The knife body (14) is provided with four long through holes (40) in a ring shape. The outer wall of the first nut (33) is hinged to one end of four first connecting rods (35). The other ends of the four first connecting rods (35) pass through the long through holes (40) and are respectively hinged to the upper parts of the inner side walls of four grinding arc plates (36). The outer wall of the second nut (34) is hinged to one end of four second connecting rods (37). The other ends of the four second connecting rods (37) pass through the long through holes (40) and are respectively hinged to the rear parts of the inner side walls of the four grinding arc plates (36). The four grinding arc plates (36) are respectively fixedly connected to the four hole-expanding arc plates (21).

3. The angle steel automated processing system according to claim 2, characterized in that: A plurality of grinding edges (60) are fixed on the outer wall of the grinding arc plate (36).

4. The angle steel automated processing system according to claim 1, characterized in that: The lifting mechanism comprises a lifting seat (70) fixed on the support frame (2); a third motor (71) is fixed on the lifting seat (70); an output shaft of the third motor (71) is coaxially fixed with a lead screw (72); the lead screw (72) is rotatably mounted on the lifting seat (70); the lead screw (72) is threadedly connected to the fixed shell (10); two guide blocks (73) are fixed on the fixed shell (10); the guide blocks (73) are slidably matched with guide rods (74); and the guide rods (74) are fixed on the lifting seat (70).

5. The angle steel automated processing system according to claim 1, characterized in that: A bending plate (80) is fixed on the support frame (2), a cylinder (81) is fixed on the bending plate (80), and an output end of the cylinder (81) is fixedly connected to a butt joint (82).

6. The angle steel automated processing system according to claim 3, characterized in that: A first processing seat (90) and a second processing seat (91) are fixed on the bottom plate (1); the first processing seat (90) and the second processing seat (91) are capable of jointly bearing angle steel; and a limiting seat (92) is fixed on the second processing seat (91).

7. The angle steel automated processing system according to claim 6, characterized in that: The second oil delivery pipe (53) is a "Z"-shaped pipe.

8. The angle steel automated processing system according to claim 7, characterized in that: The support frame (2) comprises a vertical frame (221) arranged vertically and an inclined frame (222) arranged obliquely, wherein one end of the vertical frame (221) is fixed to the upper end surface of the bottom plate (1), the other end of the vertical frame (221) is fixedly connected to one end of the inclined frame (222), and the other end of the inclined frame (222) is fixedly connected to the bottom plate (1).

Citation Information

Patent Citations

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