A mechanical synchronous lifting device for a combined cutting machine

Abstract

The present invention discloses a mechanical synchronous lifting device of a combined cutting machine, which relates to the technical field of concrete block cutting, and includes a support assembly, a drive assembly, a placement assembly, and a lifting assembly. The support assembly includes a base plate, the top of the base plate is fixedly connected to a first slide rail, the top of the base plate is fixedly connected to a circular ring near the inner side of the first slide rail, the top of the base plate is symmetrically fixedly connected to a first tool holder and a second tool holder, the bottom of the first tool holder is fixedly connected to a plurality of first cutting knives, and the bottom of the second tool holder is fixedly connected to a plurality of second cutting knives; the drive assembly is fixedly connected to the top of the first tool holder, the drive assembly includes a support frame, and the bottom of the support frame is fixedly connected to a support plate. In the present invention, when the device is used, two blocks of blanks are placed on it, and the cutting work of the two blocks in two directions can be automatically completed, which effectively simplifies the cutting process of the concrete block blanks and improves the processing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of concrete block cutting, in particular to a mechanical synchronous lifting device of a combined cutting machine. Background Art

[0002] Concrete blocks are block-shaped building materials made from cement, sand, gravel, water and other main raw materials through mixing, molding, curing and other processes. During the processing of concrete blocks, the large blocks will be cut, and the small blocks after cutting will be used after being fired and formed.

[0003] In the prior art, when cutting large blocks of blanks, it is necessary to perform horizontal and vertical cutting from above to complete the cutting process of multiple uniform-sized blocks. When using a cutting machine, a single cutting machine can only be used to complete the cutting process in one direction. Therefore, to complete the processing, the blanks need to be fed into two cutting machines separately to complete the cutting process. This method of cutting concrete blocks is relatively cumbersome and has low processing efficiency.

[0004] Therefore, a mechanical synchronous lifting device for a combined cutting machine is proposed to solve the problems raised in the above background technology. Summary of the Invention

[0005] The object of the present invention is to provide a mechanical synchronous lifting device for a combined cutting machine to solve the problem raised in the above background technology that the blank needs to be fed into two cutting machines separately in order to complete the cutting process.

[0006] The lifting mechanism is a pair of fixedly mounted on-site cutting tools, and the lifting mechanism is a pair of fixedly mounted on-site cutting tools, and the lifting mechanism is a pair of fixedly mounted on-site cutting tools.

[0007] Preferably, a motor is fixedly connected to the top of the support plate, the output end of the motor passes through the support plate and extends to the lower side, the output end of the motor is fixedly connected to a rotating shaft, the lower end face of the rotating shaft is fixedly connected to a first gear, and the bottom of the support plate is rotatably connected to the first support shaft.

[0008] Preferably, a second gear is fixedly connected to the outer surface of the first support shaft, and the second gear is in meshing state with the first gear. The bottom of the support plate is rotatably connected to the second support shaft, and a third gear is fixedly connected to the outer surface of the second support shaft, and the third gear is in meshing state with the second gear. A drive sleeve is provided on the outer surface of the second support shaft, and the drive sleeve is located at the lower side of the third gear.

[0009] Preferably, the outer surface of the driving sleeve is fixedly connected to the fourth gear, the lower end surface of the first support shaft is fixedly connected to the rotating block, the outer surface of the rotating block is symmetrically fixedly connected to the arc-shaped tooth plate, the arc-shaped tooth plate is in a meshing state with the fourth gear, the second gear, the third gear and the fourth gear have the same number of teeth, and the number of teeth of the arc-shaped tooth plate is one-fourth of the fourth gear.

[0010] By adopting the above technical solution and setting the arc-shaped tooth plate, after the rotating block completes one circle of rotation, it can drive the fourth gear to complete half a circle of intermittent rotation. During the intermittent process, the jacking and cutting processing of the blank can be realized.

[0011] Preferably, a plurality of positioning blocks are fixedly connected to the top of the side frame, a plurality of extension rods are evenly fixedly connected to the bottom of the side frame, a friction block is fixedly connected to the lower end surface of the extension rod, the friction block is located inside the first slide rail, and the outer surface of the friction block is in contact with the inner surface of the first slide rail.

[0012] By adopting the above technical solution, the friction block is in contact with the inner wall of the first slide rail when it is stationary and the friction force generated by pressure is utilized to ensure that the side frame is in a stable position waiting to be lifted. At the same time, it can avoid rotational displacement of the side frame when it is in a state of force lifting and rotation, thereby improving the accuracy of the cutting position.

[0013] Preferably, the driving sleeve is fixedly connected to the rotating seat, the second support shaft passes through the rotating seat and extends to the lower side, and the side frame is matched with the first tool holder and the second tool holder.

[0014] By adopting the above technical solution, the driving sleeve can drive the side frames on both sides to rotate as it rotates, and the cutting process is completed through the rotation of the side frames.

[0015] Preferably, the lifting seat is fixedly connected between the bottoms of the two side frames, the lifting seat is annular, the rotating axis of the lifting seat is consistent with that of the rotating seat, and grooves are symmetrically provided on the bottom of the lifting seat.

[0016] By adopting the above technical solution, the support and the lifting wheel are driven by the sliding seat to follow the rotation displacement, and the lifting wheel will contact the inclined surface between the groove and the surface of the lifting seat. The lifting wheel can lift the lifting seat, and after the lifting seat is lifted, the blank can be driven to move upward to complete the cutting.

[0017] Preferably, a plurality of notches are evenly opened on the top of the ring, and the inner surfaces of the plurality of notches are rotatably connected to pulleys. The sliding seat is located outside the ring, and a support is fixedly connected to the top of the sliding seat. The inner surface of the support is rotatably connected to a lifting wheel, and the outer surface of the lifting wheel is in contact with the inner surface of the groove.

[0018] By adopting the above technical solution, the lifting wheel will rotate during the process of contacting with the lifting seat, and the rotation can be used to reduce friction, thereby reducing wear during operation of the device.

[0019] Preferably, a connecting seat is fixedly connected between the outer surfaces of the plurality of sliding seats, and the top of the connecting seat is fixedly connected to the lower end surface of the second support shaft.

[0020] By adopting the above technical solution and setting the connecting seat, it is possible to drive multiple sliding seats.

[0021] Preferably, the first cutting knife and the second cutting knife have the same size and height, and the first cutting knife and the second cutting knife are in different cutting directions.

[0022] By adopting the above technical solution, the blank is cut in different directions by the first cutting knife and the second cutting knife respectively when it is fed in for the first time. Then the two blanks are swapped and the second cutting knife is continued to complete the second cutting, thus realizing the cutting work of the two blanks in two directions.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. In the present invention, when cutting the concrete block blanks, two blanks are placed on the two side frames respectively. The starting stroke of the motor is to control the second gear to rotate two circles to complete the cutting work. During the first circle of rotation, the two blanks are cut in different directions respectively and the positions are exchanged. In the next circle of rotation of the second gear, the blanks cut by the first cutting knife will be sent to the bottom of the second cutting knife for cutting, and the blanks cut by the second cutting knife will be sent to the bottom of the first cutting knife for cutting. When the device is in use, the two blanks are placed on it, and the cutting work of the two directions of the two blanks can be automatically completed, which effectively simplifies the cutting process of the concrete block blanks and improves the processing efficiency.

[0025] 2. In the present invention, when the fourth gear is disengaged, the friction block is in contact with the inner wall of the first slide rail when it is stationary and the friction force generated by the pressure is used to ensure that the side frame is in a stable position waiting to be lifted. At the same time, it can avoid rotational displacement of the side frame when it is in a state of force lifting and rotation, thereby improving the accuracy of the cutting position and further improving the processing quality of the cutting machine.

[0026] 3. In the present invention, the support and the lifting wheel are driven to follow the rotation displacement by the sliding seat. The lifting wheel will contact the inclined surface between the groove and the surface of the lifting seat. The lifting wheel can lift the lifting seat. During the movement of the lifting wheel and the contact with the lifting seat, the lifting wheel will rotate. The rotation can reduce the friction force, thereby reducing the wear of the device during operation, thereby increasing the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional diagram of a mechanical synchronous lifting device of a combined cutting machine according to the present invention;

[0028] Figure 2 It is a front view of a mechanical synchronous lifting device of a combined cutting machine of the present invention;

[0029] Figure 3 A bottom view of a mechanical synchronous lifting device of a combined cutting machine according to the present invention;

[0030] Figure 4 This is a schematic structural diagram of a support assembly of a mechanical synchronous lifting device of a combined cutting machine according to the present invention;

[0031] Figure 5 This is a schematic structural diagram of a drive assembly of a mechanical synchronous lifting device of a combined cutting machine according to the present invention;

[0032] Figure 6 for Figure 5 A magnified view of the structure at point A;

[0033] Figure 7 This is a schematic structural diagram of a placement component of a mechanical synchronous lifting device of a combined cutting machine according to the present invention;

[0034] Figure 8 The present invention is a schematic structural diagram of a lifting component of a mechanical synchronous lifting device of a combined cutting machine.

[0035] In the figure: 1. Support assembly; 101. Bottom plate; 102. First slide rail; 103. Ring; 104. Pulley; 105. First tool holder; 106. First cutting blade; 107. Second tool holder; 108. Second cutting blade; 2. Drive assembly; 201. Support frame; 202. Support plate; 203. Motor; 204. Rotating shaft; 205. First gear; 206. First support shaft; 207. Second gear; 208. Rotating block; 209. Arc-shaped tooth plate; 210, second support shaft; 211, third gear; 212, fourth gear; 213, drive sleeve; 3, placement assembly; 301, rotating seat; 302, second slide rail; 303, slider; 304, side frame; 305, positioning block; 306, extension rod; 307, friction block; 4, lifting assembly; 401, lifting seat; 402, groove; 403, sliding seat; 404, connecting seat; 405, support; 406, lifting wheel. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figures 1-8As shown, the present invention provides a technical solution: a mechanical synchronous lifting device of a combined cutting machine, comprising a support assembly 1, a drive assembly 2, a placement assembly 3 and a lifting assembly 4, the support assembly 1 comprises a base plate 101, the top of the base plate 101 is fixedly connected to a first slide rail 102, the top of the base plate 101 is fixedly connected to a ring 103 near the inner side of the first slide rail 102, the top of the base plate 101 is symmetrically fixedly connected to a first tool holder 105 and a second tool holder 107, the bottom of the first tool holder 105 is fixedly connected to a plurality of first cutting knives 106, the second cutting knives 107 and the first cutting knives 107 are fixedly connected to the bottom of the first tool holder 105, and the first cutting knives 106 and the second cutting knives 107 are fixedly connected to the bottom of the first tool holder 105. A plurality of second cutting knives 108 are fixedly connected to the bottom of the frame 107; the driving assembly 2 is fixedly connected to the top of the first knife holder 105, and the driving assembly 2 includes a support frame 201, and a support plate 202 is fixedly connected to the bottom of the support frame 201; the placement assembly 3 is located at the lower side of the support frame 201, and the placement assembly 3 includes a rotating base 301, and the outer surfaces of both sides of the rotating base 301 are symmetrically fixedly connected to the second slide rails 302, and the outer surfaces of the plurality of second slide rails 302 are slidably connected to the sliders 303, and the outer surfaces of the two groups of sliders 303 are fixedly connected to the side frame 304;The lifting assembly 4 is located on the upper side of the base plate 101. The lifting assembly 4 includes a lifting seat 401 and a plurality of sliding seats 403. The top of the support plate 202 is fixedly connected to the motor 203. The output end of the motor 203 passes through the support plate 202 and extends to the lower side. The output end of the motor 203 is fixedly connected to the rotating shaft 204. The lower end surface of the rotating shaft 204 is fixedly connected to the first gear 205. The bottom of the support plate 202 is rotatably connected to the first support shaft 206. The outer surface of the first support shaft 206 is fixedly connected to the second gear 207. The second gear 207 is in a meshing state with the first gear 205. The bottom of the support plate 202 is rotatably connected to the second support shaft 210. The outer surface of the second support shaft 210 is fixedly connected to the There is a third gear 211, and the third gear 211 is in a meshing state with the second gear 207. The outer surface of the second support shaft 210 is provided with a driving sleeve 213, and the driving sleeve 213 is located at the lower side of the third gear 211. The outer surface of the driving sleeve 213 is fixedly connected to the fourth gear 212. The lower end surface of the first support shaft 206 is fixedly connected to the rotating block 208. The outer surface of the rotating block 208 is symmetrically fixedly connected with an arc-shaped toothed plate 209. The arc-shaped toothed plate 209 is in a meshing state with the fourth gear 212. The second gear 207, the third gear 211 and the fourth gear 212 have the same number of teeth. The number of teeth of the arc-shaped toothed plate 209 is one-fourth of the fourth gear 212. The top of the side frame 304 is fixedly connected to multiple The bottom of the side frame 304 is evenly fixed with a plurality of extension rods 306, and the lower end surface of the extension rod 306 is fixedly connected with a friction block 307. The friction block 307 is located inside the first slide rail 102, and the outer surface of the friction block 307 fits the inner surface of the first slide rail 102. The driving sleeve 213 is fixedly connected to the rotating seat 301 through the second support shaft 210 and extends to the lower side. The side frame 304 is matched with the first tool holder 105 and the second tool holder 107. The lifting seat 401 is fixedly connected between the bottoms of the two side frames 304. The lifting seat 401 is annular. The lifting seat 401 and the rotating seat 301 have the same rotation axis. The bottom of the lifting seat 401 is aligned with the bottom of the rotating seat 301. A groove 402 is formed on the ring 103, and multiple notches are evenly spaced on the top. The inner surfaces of these notches are rotatably connected to pulleys 104. A sliding seat 403 is located outside the ring 103. A support 405 is fixedly connected to the top of the sliding seat 403. A lifting wheel 406 is rotatably connected to the inner surface of the support 405. The outer surface of the lifting wheel 406 is in contact with the inner surface of the groove 402. Connecting seats 404 are fixedly connected between the outer surfaces of the multiple sliding seats 403. The top of the connecting seat 404 is fixedly connected to the lower end surface of the second support shaft 210. The first cutting blade 106 and the second cutting blade 108 are of the same size and height, and they are in different cutting directions.

[0038] The present invention uses the following steps: when cutting the concrete block blanks, two blanks are placed on the two side frames 304 respectively. By setting a plurality of positioning blocks 305 on the side frames 304, the placement position of the blanks can be positioned. After the two blanks are placed, the motor 203 is operated to drive the first gear 205 to rotate accordingly. The starting stroke of the motor 203 is to control the second gear 207 to rotate two circles to complete the cutting work. After the ninety-degree rotation in the first stage, one of the arc-shaped tooth plates 209 drives it to complete the rotation by meshing with the fourth gear 212. The fourth gear 212 can drive the rotating seat 301 to rotate accordingly by connecting with the drive sleeve 213, thereby driving the side frames 304 on both sides to complete the ninety-degree rotation. The friction block 307 and the first slide rail 102 cooperate to support the rotation of the side frame 304. The two blanks are rotated to the lower side of the first cutting knife 106 and the second cutting knife 108 respectively. When the rotating block 208 rotates, the second gear 207 will drive the second support shaft 210 to rotate accordingly by engaging with the third gear 211. The rotation of the connecting seat 404 can drive multiple sliding seats 403 to rotate accordingly. After completing the ninety-degree rotation, the rotating block 208 continues to rotate, and the second gear 207 drives the second support shaft 210 to continue to rotate by engaging with the third gear 211. That is, at this time, the sliding seat 403 will complete a ninety-degree rotation along the ring 103, and the sliding seat 403 drives The support 405 and the lifting wheel 406 follow the rotation displacement, and the lifting wheel 406 will contact the inclined surface between the groove 402 and the surface of the lifting seat 401, and the lifting wheel 406 can lift the lifting seat 401. When the lifting wheel 406 moves to the surface of the lifting seat 401, the lifting seat 401 is lifted up, thereby driving the side frame 304 to move upward. When the side frame 304 moves upward, it will drive the slider 303 to slide along the second slide rail 302, which plays a supporting and limiting role in the up and down displacement of the side frame 304. The upward movement of the side frame 304 can drive the blank to move upward synchronously. The blank moves upward and contacts the first cutting knife 106 and the second cutting knife 108 above to complete the cutting process. As the lifting wheel 406 continues to move, the lifting wheel 406 contacts the inclined surface on the other side and leaves the lifting state, and the side frame 30 4 moves down to complete the cutting work. At this time, the four lifting wheels 406 complete a ninety-degree rotation with the second support shaft 210 as the support. The position state of the four lifting wheels 406 will not change. At present, the blanks on both sides are respectively located under the first cutting knife 106 and the second cutting knife 108 to complete the cutting process in two directions. With the continuous operation of the motor 203, the arc-shaped toothed plate 209 on the other side drives the fourth gear 212 to rotate through engagement, and the rotation of the fourth gear 212 drives the rotating base 301 to rotate accordingly. At this time, the rotating base 301 can drive the side frames 304 on both sides to continue to rotate ninety degrees. At this time, the blanks on both sides rotate to the out-of-cut position, and the blanks on both sides complete the position exchange after rotating 180 degrees. At this time, as the rotation continues,The fourth gear 212 is disengaged, and the side frame 304 is in a non-rotating state. The staff can check the cutting situation, and the lifting wheel 406 continues to complete the displacement. At this time, the second gear 207 completes one circle of rotation. The two blanks are cut in different directions respectively and the positions are exchanged. Therefore, in the next circle of rotation of the second gear 207, the blanks cut by the first cutting knife 106 will be sent to the bottom of the second cutting knife 108 for cutting, and the blanks cut by the second cutting knife 108 will be sent to the bottom of the first cutting knife 106 for cutting. When the device is in use, the two blanks are placed on it, and the cutting work of the two blanks in two directions can be automatically completed, which effectively simplifies the cutting process of the concrete block blanks and improves the processing efficiency.

[0039] Example 2: Figure 4 and Figure 7 As shown, the top of the base plate 101 is fixedly connected to the first slide rail 102, and a plurality of extension rods 306 are evenly fixedly connected to the bottom of the side frame 304. The lower end surface of the extension rod 306 is fixedly connected to a friction block 307. The friction block 307 is located inside the first slide rail 102, and the outer surface of the friction block 307 is in contact with the inner surface of the first slide rail 102.

[0040] The present invention uses the steps of: when the fourth gear 212 is out of engagement, the friction block 307 is in contact with the inner wall of the first slide rail 102 in a stationary state and the friction force generated by the pressure is used to ensure that the side frame 304 is in a stable position waiting to be lifted. At the same time, it can avoid rotational displacement of the side frame 304 when it is in a forced lifting rotation, thereby improving the accuracy of the cutting position and further improving the processing quality of the cutting machine.

[0041] Example 3: Figure 8 As shown, a support 405 is fixedly connected to the top of the sliding seat 403 , and a lifting wheel 406 is rotatably connected to the inner surface of the support 405 .

[0042] The use steps of the present invention are as follows: the support 405 and the lifting wheel 406 are driven to follow the rotation displacement by the sliding seat 403, and the lifting wheel 406 will contact the inclined surface between the groove 402 and the surface of the lifting seat 401. The lifting wheel 406 can lift the lifting seat 401. During the movement of the lifting wheel 406 and the contact with the lifting seat 401, the lifting wheel 406 will rotate. The rotation can reduce the friction force, thereby reducing the wear during the operation of the device and thus improving the service life of the device.

[0043] The effect and working principle achieved by the entire mechanism are as follows: when cutting the blanks of concrete blocks, the combined cutting machine can be used to simultaneously cut two blanks in two directions. When starting the cutting process, the two blanks are placed on the two side frames 304 respectively. By setting a plurality of positioning blocks 305 on the side frames 304, the placement position of the blanks can be positioned to ensure that the blanks are aligned with the first cutting knife 106 and the second cutting knife 108 to complete two cutting processes. After the two blanks are placed, the motor 203 is started to start the cutting process. After the motor 203 is running, it can drive the shaft 204 to rotate. The rotation of the shaft 204 can drive the first gear 205 to follow the rotation. When the first gear 205 rotates, The second gear 207 realizes the deceleration drive, and the starting stroke of the motor 203 is to control the second gear 207 to rotate two circles to complete the cutting work. The rotation of the second gear 207 can drive the first support shaft 206 and the rotating block 208 to rotate accordingly. Through the arrangement of the two arc-shaped tooth plates 209 on the outer surface of the rotating block 208, after the rotating block 208 completes one circle of rotation, the two arc-shaped tooth plates 209 can respectively drive the fourth gear 212 to complete a ninety-degree rotation through engagement. After the ninety-degree rotation in the first stage, one of the arc-shaped tooth plates 209 drives it to follow and complete the rotation by engaging with the fourth gear 212. At this time, the fourth gear 212 can drive the rotating base 301 to follow and rotate through the connection with the driving sleeve 213. When the second gear 207 is engaged with the third gear 211, the second gear 207 drives the second support shaft 210 to rotate with it. The fourth gear 212 is disengaged from the meshing state with the arc-shaped toothed plate 209, so the fourth gear 212 of the rotating block 208 does not rotate during the 90-degree rotation of the downward stroke. When the fourth gear 212 is disengaged, the friction block 307 is in contact with the inner wall of the first slide rail 102 when it is stationary and the friction force generated by the pressure is used to ensure that the side frame 304 is in a stable position waiting to be lifted. When the rotating block 208 continues to rotate,When the fourth gear 212 is not rotating, the second gear 207 drives the second support shaft 210 to continue to rotate by meshing with the third gear 211. That is, at this time, the sliding seat 403 will complete a ninety-degree rotation along the ring 103, and the support 405 and the lifting wheel 406 will follow the rotation displacement through the sliding seat 403. The lifting wheel 406 will contact the inclined surface between the groove 402 and the surface of the lifting seat 401, and the lifting wheel 406 can lift the lifting seat 401. When the lifting wheel 406 moves and contacts with the lifting seat 401, it will rotate. The rotation can reduce friction, thereby reducing wear during the operation of the device. When the lifting seat 401 is on the surface, the lifting seat 401 is lifted up, thereby driving the side frame 304 to move upward. When the side frame 304 moves upward, it will drive the slider 303 to slide along the second slide rail 302, which plays a supporting and limiting role in the up and down displacement of the side frame 304. The upward movement of the side frame 304 can drive the blank to move upward synchronously. The blank moves upward and contacts the first cutting knife 106 and the second cutting knife 108 above to complete the cutting process. As the lifting wheel 406 continues to move, the lifting wheel 406 contacts the inclined surface on the other side and leaves the lifting state. The side frame 304 moves down to complete the cutting work. At this time, the four lifting wheels 406 complete a 90-degree rotation with the second support shaft 210 as the support, and the position state of the four lifting wheels 406 is not The second gear 212 is in the state of not rotating, and the ... The cutting situation is checked, and the lifting wheel 406 continues to move. At this time, the second gear 207 completes one circle of rotation. The two blanks are cut in different directions respectively and the positions are exchanged. Therefore, in the next circle of rotation of the second gear 207, the blanks cut by the first cutting knife 106 will be sent to the bottom of the second cutting knife 108 for cutting, and the blanks cut by the second cutting knife 108 will be sent to the bottom of the first cutting knife 106 for cutting. When the device is in use, the two blanks are placed on it, and the cutting work of the two blanks in two directions can be automatically completed, which effectively simplifies the cutting process of the concrete block blanks and improves the processing efficiency.

[0044] Among them, the motor 203 is a prior art, and its components and operating principles are public technologies, so no further explanation is given here.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical synchronous lifting device for a modular cutting machine, comprising a support assembly, a drive assembly, a placement assembly, and a lifting assembly, characterized in that: The support assembly includes a base plate, a first slide rail is fixedly connected to the top of the base plate, a circular ring is fixedly connected to the top of the base plate near the inner side of the first slide rail, a first knife holder and a second knife holder are symmetrically fixedly connected to the top of the base plate, a plurality of first cutting knives are fixedly connected to the bottom of the first knife holder, a plurality of second cutting knives are fixedly connected to the bottom of the second knife holder, the first cutting knives and the second cutting knives are consistent in size and height, and the first cutting knives and the second cutting knives are in different cutting directions; The transmission gear of the present invention is a gear which is connected to the first gear and the gear is meshed with each other, and the gear is connected with the gear train of the present invention on an outer surface of the gear train, and the gear is connected with the gear of the gear train to form a gearbox. The placement assembly is located at the lower side of the support frame, and the placement assembly includes a rotating seat, the outer surfaces of both sides of the rotating seat are symmetrically fixedly connected to the second slide rails, the outer surfaces of multiple second slide rails are slidably connected to sliders, and a side frame is fixedly connected between the outer surfaces of the two groups of sliders, the driving sleeve is fixedly connected to the rotating seat, the second support shaft passes through the rotating seat and extends to the lower side, and the side frame cooperates with the first tool holder and the second tool holder; The jacking assembly is located at the upper upper position of the base plate, and the jacking assembly includes a jacking seat and multiple sliding seats, and the jacking seat is fixedly connected between the bottom of the two side frames. The jacking seat is annular, and the jacking seat is consistent with the rotation axis of the rotating seat. The bottom of the jacking seat is symmetrically provided with grooves, and the top of the ring is evenly provided with multiple notches. The inner surfaces of the multiple notches are rotatably connected to pulleys, and the sliding seat is located at the outer side of the ring. The top of the sliding seat is fixedly connected to a support, and the inner surface of the support is rotatably connected to a jacking wheel, the outer surface of the jacking wheel is in contact with the inner surface of the groove, and a connecting seat is fixedly connected between the outer surfaces of the multiple sliding seats, and the top of the connecting seat is fixedly connected to the lower end face of the second support shaft.

2. The mechanical synchronous lifting device of the combined cutting machine according to claim 1, characterized in that: A plurality of positioning blocks are fixedly connected to the top of the side frame, a plurality of extension rods are evenly fixedly connected to the bottom of the side frame, a friction block is fixedly connected to the lower end surface of the extension rod, the friction block is located inside the first slide rail, and the outer surface of the friction block is in contact with the inner surface of the first slide rail.

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