An automatic cutting device for the inner steel frame of a sofa bed

Abstract

This invention relates to the field of automatic steel frame cutting technology, and discloses an automatic cutting device for the steel frame inside a sofa bed. The device includes a support mechanism, a cutting mechanism, a moving mechanism, a pressurizing mechanism, and a buffering mechanism. The side of the support mechanism is fixedly connected to the side of the moving mechanism, the bottom of the moving mechanism is fixedly connected to the top of the cutting mechanism, the bottom of the moving mechanism is connected to the top of the pressurizing mechanism, and the side of the pressurizing mechanism is fixedly connected to the bottom of the buffering mechanism. By pressing down the moving frame through the guide groove on the side of the control plate, the clamping rod is driven to evenly clamp the steel frame, which helps ensure the stability of the steel during cutting and avoids deformation or misalignment of the steel caused by uneven pressure. The starting and stopping of the pressurizing cylinder is controlled by a monitoring ring to control the unloading force in the later stages of cutting, which helps to maintain a reasonable and balanced load on the tool and equipment at each stage of cutting.

Description

Technical Field

[0001] This invention relates to the field of automatic steel frame cutting technology, and more specifically to an automatic cutting device for the steel frame inside a sofa bed. Background Technology

[0002] The steel frame is a crucial component of a sofa bed, responsible for bearing and distributing the bed's weight to ensure comfort and safety during use. Steel frames are typically made of high-strength steel, possessing a high load-bearing capacity to support the mattress and the sleeper's weight, ensuring they don't easily deform over long-term use. Most sofa bed steel frames are designed with a folding function, allowing for easy conversion from sofa to bed without significant effort. Therefore, precise control over the dimensions and shape is essential during the steel frame cutting process. Regardless of the design, burrs or deformation may still exist after cutting, as detailed below:

[0003] 1. Uneven pressure during the cutting process can cause steel frame deformation. If the material is thin, curling or warping may also occur. Deformed steel frame not only affects cutting accuracy but also causes structural instability during subsequent use, affecting the overall quality and safety of the product.

[0004] Second, during the cutting process, factors such as thermal expansion and cooling of the material can lead to uneven local stress. If the clamping force remains constant, it is impossible to effectively adjust the local stress distribution, which can cause cracks, burrs or other defects in the product, affecting the quality of the cut steel.

[0005] Therefore, the present invention urgently needs an automatic cutting device for the steel frame inside a sofa bed. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides an automatic cutting device for the steel frame inside a sofa bed, so as to solve the problems existing in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an automatic cutting device for the inner steel frame of a sofa bed, comprising a support mechanism, a cutting mechanism, a moving mechanism, a pressing mechanism, and a buffering mechanism, wherein the side of the support mechanism is fixedly connected to the side of the moving mechanism, the bottom end of the moving mechanism is fixedly connected to the top end of the cutting mechanism, the bottom end of the moving mechanism is connected to the top end of the pressing mechanism, and the bottom end of the pressing mechanism is fixedly connected to the top end of the buffering mechanism;

[0008] The moving mechanism includes a rotating disk and a balance plate. A guide rail is fixedly connected to the inner side of the rotating disk. The side of the guide rail is connected to the side of the moving roller. A pressure groove is opened on the outer side of the rotating disk. The inner side of the pressure groove is connected to the top of the pressure mechanism.

[0009] The pressurizing mechanism includes a control plate and a pressurizing rod. An inner fixed platform is connected to the inner side of the control plate. The top of the inner fixed platform is connected to the bottom of the pressurizing rod. An arc-shaped guide groove is provided on the side of the control plate. The inner side of the arc-shaped guide groove is connected to the side of the support mechanism.

[0010] Furthermore, the support mechanism includes an L-shaped load-bearing plate, a support plate is fixedly connected to the side of the vertical portion of the L-shaped load-bearing plate, a rotating groove is opened on the side of the vertical portion of the L-shaped load-bearing plate, a fixing frame is fixedly connected to the top surface of the horizontal portion of the L-shaped load-bearing plate, a support roller is connected to the side of the fixing frame, the side of the support roller is connected to the side of the steel frame to be cut, and a guide rod is fixedly connected to the side of the vertical portion of the L-shaped load-bearing plate, the end of the guide rod is connected to the side of the arc-shaped guide groove.

[0011] Furthermore, the cutting mechanism includes a movable support rod and a blade guard. The bottom end of the movable support rod is fixedly connected to a mounting platform, the side of the mounting platform is fixedly connected to a rotary motor, the side of the rotary motor is connected to the side of the blade guard, the output end of the rotary motor is fixedly connected to a cutting tool, and the top end of the movable support rod is fixedly connected to the bottom end of the moving mechanism.

[0012] Furthermore, one end of a rotating rod is fixedly connected to the side of the rotating disk, the rotating rod passes through the rotating groove, and the other end of the rotating rod is fixedly connected to a drive motor. The side of the drive motor is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate. A T-shaped connecting rod is connected to the inner side of the moving roller, and the end of the T-shaped connecting rod away from the rotating disk is fixedly connected to the side of the balance plate.

[0013] Furthermore, a guide ring groove is provided on the side of the movable roller, and the inner side of the guide ring groove is connected to the side of the guide rail. A movable rod is fixedly connected to the top surface of the balance plate, and the movable rod is installed through the support plate. A spring is fixedly connected to the top surface of the balance plate, and the top end of the spring is fixedly connected to the bottom end of the support plate. The bottom surface of the balance plate is fixedly connected to the top end of the movable support rod.

[0014] Furthermore, a vertical guide groove is provided on the side of the control panel, and the inner side of the vertical guide groove is connected to the end of the guide rod. A placement groove is provided on the side of the inner fixed platform, and a ball is connected to the inner side of the placement groove. The side of the ball is connected to the inner side of the control panel. A rotation groove is provided at the bottom of the inner fixed platform, and a T-shaped rotation rod is connected to the inner side of the rotation groove.

[0015] Furthermore, a connecting platform is fixedly connected to the bottom end of the T-shaped rotating rod, a movable frame is fixedly connected to the side of the connecting platform, a pressure spring is fixedly connected to the bottom end of the connecting platform, a fixing plate is fixedly connected to the bottom end of the pressure spring, the side of the fixing plate is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate, a limit tube is fixedly connected to the top surface of the fixing plate, a T-shaped rod is fixedly connected to the bottom end of the connecting platform, the bottom end of the T-shaped rod is connected to the inner side of the limit tube, a monitoring ring is fixedly connected to the inner side of the limit tube, and the bottom end of the movable frame is fixedly connected to the top end of the buffer mechanism.

[0016] Furthermore, the buffer mechanism includes a pressurizing cylinder and a clamping rod. The bottom end of the pressurizing cylinder is fixedly connected to the upper side of the lower base plate of the movable frame. A downward pressing rod is fixedly connected to the output end of the pressurizing cylinder. A connecting plate is fixedly connected to the bottom end of the downward pressing rod. A downward pressing plate is fixedly connected to the side of the connecting plate. A linkage plate is connected to the side of the downward pressing plate. The side of the linkage plate is connected to the side of the clamping rod. A support frame is connected to the side of the clamping rod. The top end of the support frame is fixedly connected to the lower side of the lower base plate of the movable frame. An I-shaped connecting rod is connected to the bottom end of the support frame. A clamping arc plate is fixedly connected to the bottom end of the clamping rod. The side of the clamping arc plate is connected to the side of the steel frame to be cut.

[0017] The technical effects and advantages of this invention are as follows:

[0018] 1. This invention features a pressurizing mechanism that uses guide grooves on the side of the control plate to press down on the moving frame, causing the clamping rod to clamp the steel frame evenly. This helps ensure the stability of the steel during cutting, avoiding deformation or misalignment caused by uneven pressure, thus guaranteeing the straightness of the cutting line and the flatness of the cut. The uniform clamping force effectively prevents the steel from slipping or deforming irregularly during cutting, especially in high-precision cutting processes, which can greatly improve the consistency and appearance quality of the product.

[0019] 2. This invention incorporates a buffer mechanism and controls the start and stop of the pressurized cylinder via a monitoring ring to control the unloading force in the later stages of cutting. This helps maintain a reasonable and balanced load on the tool and equipment at each stage of cutting, resulting in more uniform tool wear and preventing localized overload of the equipment due to uneven pressure. This extends the service life of both the equipment and the tool. It also helps maintain the smoothness of cutting, avoiding vibrations or fluctuations during the cutting process, and further ensuring cutting stability.

[0020] 3. The present invention incorporates a moving mechanism, in which the rotation of the rotating disk drives the synchronous movement of the moving rollers and the pressure rod. This ensures that the pressure between the pressure plate and the cutter is always evenly distributed, avoiding excessive wear of certain parts of the cutter due to uneven pressure, thereby extending the service life of the cutter. The synchronous movement of the cutter and the pressure plate makes the adjustment during the cutting process more precise and efficient, reducing the time required for frequent adjustments, thereby improving the overall production efficiency. Attached Figure Description

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

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

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

[0024] Figure 4 This is a schematic diagram of the moving mechanism structure of the present invention;

[0025] Figure 5 This is a schematic diagram of the pressurization mechanism of the present invention;

[0026] Figure 6 This is a partial structural diagram of the pressurization mechanism of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the movable frame of the present invention;

[0028] Figure 8 This is a schematic diagram of the buffer mechanism structure of the present invention;

[0029] Figure 9 This is the circuit diagram of the pressurized cylinder of the present invention.

[0030] The attached figures are labeled as follows:

[0031] 1. Support mechanism; 101. L-shaped load-bearing plate; 102. Support plate; 103. Rotating groove; 104. Fixing frame; 105. Supporting roller; 106. Steel frame to be cut; 107. Guide rod;

[0032] 2. Cutting mechanism; 201. Moving support rod; 202. Rotary motor; 203. Mounting platform; 204. Blade guard; 205. Cutting blade;

[0033] 3. Moving mechanism;

[0034] 31. Rotary disk; 311. Rotating rod; 312. Drive motor; 313. Pressure groove; 314. Guide rail; 32. Balance plate; 321. Moving rod; 322. Elastic spring; 323. T-shaped connecting rod; 324. Moving roller; 325. Guide ring groove;

[0035] 4. Pressurization mechanism;

[0036] 41. Control panel; 411. Arc-shaped guide groove; 412. Vertical guide groove; 42. Pressure rod; 421. Inner fixed platform; 422. Placement groove; 423. Ball bearing; 424. Rotating groove; 43. Moving frame; 431. T-shaped rotating rod; 432. Connecting platform; 433. Pressure spring; 434. T-shaped rod; 435. Limiting tube; 436. Monitoring ring; 437. Fixing plate;

[0037] 5. Buffer mechanism;

[0038] 51. Pressurizing cylinder; 511. Lowering rod; 512. Connecting plate; 513. Lowering plate; 52. Clamping rod; 521. Support frame; 522. I-shaped connecting rod; 523. Linking plate; 524. Clamping arc plate. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The automatic cutting device for the inner steel frame of a sofa bed involved in the present invention is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Reference Figures 1 to 3 The present invention provides an automatic cutting device for the inner steel frame of a sofa bed, including a support mechanism 1, a cutting mechanism 2, a moving mechanism 3, a pressing mechanism 4 and a buffer mechanism 5. The side of the support mechanism 1 is fixedly connected to the side of the moving mechanism 3, the bottom end of the moving mechanism 3 is fixedly connected to the top end of the cutting mechanism 2, the bottom end of the moving mechanism 3 is connected to the top end of the pressing mechanism 4, and the side of the pressing mechanism 4 is fixedly connected to the bottom end of the buffer mechanism 5.

[0041] The moving mechanism 3 includes a rotating disk 31 and a balance plate 32. A guide rail 314 is fixedly connected to the inner side of the rotating disk 31. The side of the guide rail 314 is connected to the side of the moving roller 324. A pressure groove 313 is opened on the outer side of the rotating disk 31. The inner side of the pressure groove 313 is connected to the side of the pressure mechanism 4.

[0042] The pressurizing mechanism 4 includes a control plate 41 and a pressurizing rod 42. An inner fixed platform 421 is connected to the inner side of the control plate 41. The top end of the inner fixed platform 421 is connected to the bottom end of the pressurizing rod 42. An arc-shaped guide groove 411 is provided on the side of the control plate 41. The inner side of the arc-shaped guide groove 411 is connected to the side of the support mechanism 1.

[0043] The support mechanism 1 includes an L-shaped load-bearing plate 101. A support plate 102 is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate 101. A rotating groove 103 is opened on the side of the vertical part of the L-shaped load-bearing plate 101. A fixing frame 104 is fixedly connected to the top surface of the horizontal part of the L-shaped load-bearing plate 101. A support roller 105 is connected to the side of the fixing frame 104. The side of the support roller 105 is connected to the side of the steel frame to be cut 106. A guide rod 107 is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate 101. The end of the guide rod 107 is connected to the side of the arc-shaped guide groove 411.

[0044] The cutting mechanism 2 includes a movable support rod 201 and a blade guard 204. The bottom end of the movable support rod 201 is fixedly connected to a mounting platform 203. The side of the mounting platform 203 is fixedly connected to a rotary motor 202. The side of the rotary motor 202 is connected to the side of the blade guard 204. The output end of the rotary motor 202 is fixedly connected to a cutting tool 205. The top end of the movable support rod 201 is fixedly connected to the bottom end of the moving mechanism 3.

[0045] Reference Figure 4 One end of a rotating rod 311 is fixedly connected to the side of the rotating disk 31. The rotating rod 311 passes through the rotating groove 103. The other end of the rotating rod 311 is fixedly connected to a drive motor 312. The side of the drive motor 312 is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate 101. A T-shaped connecting rod 323 is connected to the inner side of the moving roller 324. The end of the T-shaped connecting rod 323 away from the rotating disk 31 is fixedly connected to the side of the balance plate 32.

[0046] The movable roller 324 has a guide ring groove 325 on its side, and the inner side of the guide ring groove 325 is connected to the side of the guide rail 314. The top surface of the balance plate 32 is fixedly connected to a movable rod 321, which passes through the support plate 102. The top surface of the balance plate 32 is fixedly connected to a spring spring 322, and the top end of the spring spring 322 is fixedly connected to the bottom end of the support plate 102. The bottom surface of the balance plate 32 is fixedly connected to the top end of the movable support rod 201.

[0047] When the rotating disk 31 rotates around the rotating rod 311, it simultaneously drives the balance plate 32 and the pressure rod 42 to move up and down. The elastic spring 322 on the side of the moving rod 321 provides power for the movement of the balance plate 32. Since the moving roller 324 slides on the inner side of the rotating disk 31, the connection between the moving rod 321 and the support plate 102 limits the movement of the balance plate 32, so that it only moves in the vertical direction of the moving rod 321, driving the moving support rod 201 downward to cut the steel frame 106 to be cut. Moreover, the guide rail 314 on the inner side of the rotating disk 31 provides a running track for the moving roller 324, making it difficult for the moving roller 324 to fall off the inner side of the rotating disk 31.

[0048] The top of the pressure rod 42 is connected to the inner side of the pressure groove 313. When the rotating disk 31 is pressed down, the pressure spring 433 fixed at the bottom of the connecting platform 432 is compressed. When the rotating disk 31 is raised, the pressure spring 433 is pressed down and acts on the connecting platform 432 to lift the pressure rod 42, so that it can be connected to the inner side of the pressure groove 313 and is not easy to detach from it.

[0049] Reference Figures 5 to 7 , Figure 9 The control panel 41 has a vertical guide groove 412 on its side, and the inner side of the vertical guide groove 412 is connected to the end of the guide rod 107. The inner fixed platform 421 has a mounting groove 422 on its side, and a ball bearing 423 is connected to the inner side of the mounting groove 422. The side of the ball bearing 423 is connected to the inner side of the control panel 41. The bottom of the inner fixed platform 421 has a rotating groove 424, and a T-shaped rotating rod 431 is connected to the inner side of the rotating groove 424.

[0050] The bottom end of the T-shaped rotating rod 431 is fixedly connected to a connecting platform 432. A moving frame 43 is fixedly connected to the side of the connecting platform 432. A pressure spring 433 is fixedly connected to the bottom end of the connecting platform 432. A fixing plate 437 is fixedly connected to the bottom end of the pressure spring 433. The side of the fixing plate 437 is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate 101. A limit tube 435 is fixedly connected to the top surface of the fixing plate 437. A T-shaped rod 434 is fixedly connected to the bottom end of the connecting platform 432. The bottom end of the T-shaped rod 434 is connected to the inside of the limit tube 435. A monitoring ring 436 is fixedly connected to the inside of the limit tube 435. The bottom end of the moving frame 43 is fixedly connected to the top end of the buffer mechanism 5.

[0051] Inside the inner fixed platform 421, there are ball bearings 423 connected to the control plate 41. Therefore, the inner fixed platform 421 moves as the guide rod 107 moves inside the arc-shaped guide groove 411 and the vertical guide groove 412 on the side of the control plate 41. The pressure rods 42 and the T-shaped rotating rods 431 at both ends of the inner fixed platform 421 can rotate without being affected by the rotation of the vertical guide groove 412. A buffer mechanism 5 is fixed at the bottom of the moving frame 43. Therefore, as the rotating disk 31 rotates, it drives the moving frame 43 and the buffer mechanism 5 to move. To reduce burrs on the surface of the cut steel frame 106, the pressure on the steel frame 106 is reduced as it is about to be cut. Therefore, when the T-shaped rod 434 moves to its bottom end inside the limiting tube 435, the T-shaped rod 434 cuts off the signal transmission between the monitoring rings 436, thereby activating the pressurizing cylinder 51 to release the surface pressure of the steel frame 106. Since the moving frame 43 moves the same distance as the moving support rod 201, it is more effective for cutting steel of the same type.

[0052] Reference Figure 8The buffer mechanism 5 includes a pressurizing cylinder 51 and a clamping rod 52. The bottom end of the pressurizing cylinder 51 is fixedly connected to the upper side of the lower base plate of the moving frame 43. The output end of the pressurizing cylinder 51 is fixedly connected to a pressing rod 511. The bottom end of the pressing rod 511 is fixedly connected to a connecting plate 512. The side of the connecting plate 512 is fixedly connected to a pressing plate 513. The side of the pressing plate 513 is connected to a connecting plate 523. The side of the connecting plate 523 is connected to the side of the clamping rod 52. The side of the clamping rod 52 is connected to a support frame 521. The top end of the support frame 521 is fixedly connected to the lower side of the lower base plate of the moving frame 43. The bottom end of the support frame 521 is connected to an I-shaped connecting rod 522. The bottom end of the clamping rod 52 is fixedly connected to a clamping arc plate 524. The side of the clamping arc plate 524 is connected to the side of the steel frame 106 to be cut.

[0053] When pressure is applied to the steel frame 106 to be cut, the lower pressure rod 511 is in the extended state. Therefore, the parts in contact with the steel frame 106 are mainly the lower pressure plate 513, the connecting plate 523, and the clamping arc plate 524. The force is applied by the lower pressure plate 513 and the connecting plate 523. Since the two ends of the connecting plate 512 are fixedly connected to the sides of the lower pressure plate 513, it moves with the extension and retraction of the lower pressure rod 511. When it is necessary to relieve the clamping force on the steel frame 106 to be cut within a certain range, the pressure is applied. The cylinder 51 drives the lower pressure rod 511 to retract, which moves the lower pressure plate 513 upward and changes the angle between the connecting plate 523 and the lower pressure plate 513. The clamping arc plate 524 is moved to the side of the steel frame 106 to be cut for clamping. The pressure on the side of the steel frame 106 to be cut is greatly reduced, so that the cutting tool 205 cuts the steel frame 106 to be cut more smoothly. The support frame 521 and the clamping rod 52 are connected by an I-shaped connecting rod 522, and the two can rotate relative to each other.

[0054] The working principle of this invention is as follows: The drive motor 312 drives the rotating rod 311, which is fixed to the edge of the rotating disk 31. Therefore, the rotating disk 31 rotates around the rotating rod 311, and the moving roller 324 slides inside the rotating disk 31. Due to the limiting effect of the rotating disk 31, the balance plate 32 connected to the side of the T-shaped connecting rod 323 fixed to the side of the moving roller 324 moves downwards, pressing down on the moving support rod 201 and causing the mounting platform 203 to move downwards. The cutting tool 205 then cuts the steel frame to be cut. Cutting is performed on 106. The moving rod 321 fixedly connected to the top of the balance plate 32 is guided by the inner side of the support plate 102 to move up and down in the direction of the moving rod 321, which drives the moving support rod 201 to move synchronously. There is a support roller 105 in the middle of the fixed frame 104 fixed at the top of the L-shaped load-bearing plate 101. The steel frame 106 to be cut is supported by the two support rollers 105 for cutting by the cutting tool 205. The clamping arc plate 524 is connected to the side of the steel frame 106 to be cut for fixation.

[0055] A pressure groove 313 is formed on the outer side of the rotating disk 31, and its inner side is connected to the side of the pressure rod 42. When the rotating disk 31 rotates, the control plate 41 moves downward through the pressure rod 42. The buffer mechanism 5 fixed at the bottom of the moving frame 43 clamps and presses the steel frame 106 to be cut. When the moving roller 324 slides on the side of the guide rail 314 inside the rotating disk 31 and drives the moving support rod 201 to move downward, the pressure groove 313 formed on the outer side of the rotating disk 31 presses down on the pressure rod 42. The guide rod 107 fixed on the side of the L-shaped load-bearing plate 101 slides on the inner side of the vertical guide groove 412, pressing down the T-shaped rotating rod 431 connected to the bottom of the inner fixed platform 421. The connecting table 432 is moved, and the moving frame 43 fixed on the side of the connecting table 432 moves the buffer mechanism 5 downward. When the connecting table 432 moves, it compresses the pressure spring 433 to balance the pressure at the top. As the pressure spring 433 is compressed, the T-shaped rod 434 moves inside the limiting tube 435. Since the movement of the moving frame 43 and the movement of the cutting tool 205 are both achieved by rotating the rotating disk 31 around the rotating rod 311, the downward distance of the moving frame 43 is the same as the distance that the cutting tool 205 moves. Therefore, the clamping effect of the steel frame 106 to be cut is also adjusted with the cutting depth, which can alleviate the problem of burrs on the cut surface.

[0056] As the cutting depth of the cutting tool 205 increases, the force applied to the steel frame 106 by the buffer mechanism 5 fixed at the bottom of the moving frame 43 also gradually increases. When the cutting tool 205 is about to finish cutting the steel frame 106, the clamping effect on the steel frame 106 needs to be reduced to reduce the possibility of deformation of the steel frame 106. When the connecting table 432 drives the T-shaped rod 434 to move inside the limiting tube 435, because there is a monitoring ring 436 near the bottom of the limiting tube 435, when the bottom of the T-shaped rod 434... When the device moves to the position of the monitoring ring 436, it blocks the conductivity of the monitoring ring 436, thus driving the pressurizing cylinder 51 to run. Before operation, due to the fixing effect of the lower pressure rod 511, the steel frame to be cut 106 is clamped at a fixed angle with the lower pressure plate 513 and the connecting plate 523. When the pressurizing cylinder 51 is started, the lower pressure rod 511 retracts upward, driving the connecting plate 512 to move upward, thereby changing the angle between the lower pressure plate 513 and the connecting plate 523, reducing the pressure on the top of the steel frame to be cut 106, and alleviating the burrs and deformation caused by the cutting tool 205 finishing the cutting.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An automatic cutting device for the inner steel frame of a sofa bed, comprising a support mechanism (1), characterized in that: It also includes a cutting mechanism (2), a moving mechanism (3), a pressurizing mechanism (4) and a buffering mechanism (5). The side of the supporting mechanism (1) is fixedly connected to the side of the moving mechanism (3), the bottom end of the moving mechanism (3) is fixedly connected to the top end of the cutting mechanism (2), the bottom end of the moving mechanism (3) is connected to the top end of the pressurizing mechanism (4), and the bottom end of the pressurizing mechanism (4) is fixedly connected to the top end of the buffering mechanism (5). The moving mechanism (3) includes a rotating disk (31) and a balance plate (32). A guide rail (314) is fixedly connected to the inner side of the rotating disk (31). The side of the guide rail (314) is connected to the side of the moving roller (324). A pressure groove (313) is opened on the outer side of the rotating disk (31). The inner side of the pressure groove (313) is connected to the top of the pressure mechanism (4). The pressurizing mechanism (4) includes a control plate (41) and a pressurizing rod (42). An inner fixing platform (421) is connected to the inner side of the control plate (41). The top end of the inner fixing platform (421) is connected to the bottom end of the pressurizing rod (42). An arc-shaped guide groove (411) is provided on the side of the control plate (41). The inner side of the arc-shaped guide groove (411) is connected to the side of the support mechanism (1). The support mechanism (1) includes an L-shaped load-bearing plate (101), a support plate (102) is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate (101), a rotating groove (103) is opened on the side of the vertical part of the L-shaped load-bearing plate (101), a fixing frame (104) is fixedly connected to the top surface of the horizontal part of the L-shaped load-bearing plate (101), a support roller (105) is connected to the side of the fixing frame (104), the side of the support roller (105) is connected to the side of the steel frame to be cut (106), a guide rod (107) is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate (101), and the end of the guide rod (107) is connected to the side of the arc-shaped guide groove (411). One end of a rotating rod (311) is fixedly connected to the side of the rotating disk (31). The rotating rod (311) passes through the rotating groove (103). The other end of the rotating rod (311) is fixedly connected to a drive motor (312). The side of the drive motor (312) is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate (101). The inner side of the moving roller (324) is connected to a T-shaped connecting rod (323). The end of the T-shaped connecting rod (323) away from the rotating disk (31) is fixedly connected to the side of the balance plate (32). The control panel (41) has a vertical guide groove (412) on its side, and the inner side of the vertical guide groove (412) is connected to the end of the guide rod (107). The inner fixed platform (421) has a mounting groove (422) on its side, and a ball bearing (423) is connected to the inner side of the mounting groove (422). The side of the ball bearing (423) is connected to the inner side of the control panel (41). The bottom of the inner fixed platform (421) has a rotating groove (424), and a T-shaped rotating rod (431) is connected to the inner side of the rotating groove (424). The bottom end of the T-shaped rotating rod (431) is fixedly connected to a connecting platform (432), the side of the connecting platform (432) is fixedly connected to a moving frame (43), the bottom end of the connecting platform (432) is fixedly connected to a pressure spring (433), the bottom end of the pressure spring (433) is fixedly connected to a fixing plate (437), the side of the fixing plate (437) is fixedly connected to the side of the vertical part of the L-shaped load-bearing plate (101), the top surface of the fixing plate (437) is fixedly connected to a limit tube (435), the bottom end of the connecting platform (432) is fixedly connected to a T-shaped rod (434), the bottom end of the T-shaped rod (434) is connected to the inner side of the limit tube (435), the inner side of the limit tube (435) is fixedly connected to a monitoring ring (436), and the bottom end of the moving frame (43) is fixedly connected to the top end of the buffer mechanism (5). The buffer mechanism (5) includes a pressurizing cylinder (51) and a clamping rod (52). The bottom end of the pressurizing cylinder (51) is fixedly connected to the upper side of the lower base plate of the moving frame (43). The output end of the pressurizing cylinder (51) is fixedly connected to a pressing rod (511). The bottom end of the pressing rod (511) is fixedly connected to a connecting plate (512). The side of the connecting plate (512) is fixedly connected to a pressing plate (513). The side of the pressing plate (513) is connected to a connecting plate (523). The side of the connecting plate (523) is connected to the side of the clamping rod (52). The side of the clamping rod (52) is connected to a support frame (521). The top of the support frame (521) is fixedly connected to the lower side of the bottom plate of the moving frame (43). The bottom of the support frame (521) is connected to an I-shaped connecting rod (522). The bottom of the clamping rod (52) is fixedly connected to a clamping arc plate (524). The side of the clamping arc plate (524) is connected to the side of the steel frame (106) to be cut.

2. The automatic cutting device for the inner steel frame of a sofa bed according to claim 1, characterized in that: The cutting mechanism (2) includes a movable support rod (201) and a blade guard (204). The bottom end of the movable support rod (201) is fixedly connected to a mounting platform (203). The side of the mounting platform (203) is fixedly connected to a rotary motor (202). The side of the rotary motor (202) is connected to the side of the blade guard (204). The output end of the rotary motor (202) is fixedly connected to a cutting tool (205). The top end of the movable support rod (201) is fixedly connected to the bottom end of the moving mechanism (3).

3. An automatic cutting device for the inner steel frame of a sofa bed according to claim 2, characterized in that: The side of the movable roller (324) is provided with a guide ring groove (325), the inner side of the guide ring groove (325) is connected to the side of the guide rail (314), the top surface of the balance plate (32) is fixedly connected with a movable rod (321), the movable rod (321) is set through the support plate (102), the top surface of the balance plate (32) is fixedly connected with a spring spring (322), the top end of the spring spring (322) is fixedly connected to the bottom end of the support plate (102), and the bottom surface of the balance plate (32) is fixedly connected to the top end of the movable support rod (201).

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