A conveying device for a laser cutting machine

Abstract

The present application relates to the technical field of laser cutting machine, specifically relates to a kind of conveying device for laser cutting machine, including support assembly, mesa component and drive assembly, mesa component includes first rack plate and second rack plate, first rack plate and second rack plate are used to support plate material;Drive assembly includes cam drive shaft, cam drive shaft includes a plurality of for corresponding drive first rack plate and second rack plate's columnar cam, conveying device further includes lifting assembly, for controlling first rack plate and second rack plate between top dead center and bottom dead center alternatingly lift;First rack plate or second rack plate moves from top dead center to bottom dead center, and first rack plate and second rack plate are at the position of top dead center.The present application is driven by columnar cam, so that first rack plate and second rack plate alternate plate material conveying, reduce the sliding of first rack plate and second rack plate relative to plate material, to reduce the condition of plate material surface scratch.

Description

Technical Field

[0001] This invention relates to the technical field of laser cutting machines, and more specifically to a conveying device for laser cutting machines. Background Technology

[0002] Laser cutting utilizes a high-energy-density laser beam to heat the workpiece, rapidly raising its temperature to the material's boiling point within a very short time. The material then vaporizes, forming steam. This steam is ejected at high speeds, simultaneously creating cuts in the material. Due to its advantages such as high cutting speed, high precision, and high degree of automation, laser cutting machines are commonly used in the processing of various sheet materials, including metal and plastic sheets. In the automated production process of laser cutting machines, the material feeding stage is a crucial part affecting overall processing efficiency.

[0003] Chinese patent CN221695668U discloses a conveying device for a laser cutting machine, including a support assembly, a table assembly, and a drive mechanism. The support assembly has an installation space, and the table assembly is movably disposed within the installation space. The table assembly has a clearance opening. The drive mechanism is disposed on the support assembly and is driven and connected to the table assembly. The drive mechanism includes a chain drive assembly and a drive assembly. The chain drive assembly includes a drive shaft, a first drive sprocket, a second drive sprocket, a driven shaft, a driven sprocket, and a conveyor chain. The drive shaft is rotatably disposed on the support assembly, the first drive sprocket is sleeved on the drive shaft, the drive assembly drives and connects to the first drive sprocket, the second drive sprocket is sleeved on the drive shaft, the driven shaft is rotatably disposed on the support assembly and spaced apart from the drive shaft, the driven sprocket is sleeved on the driven shaft, and the conveyor chain is sleeved on the second drive sprocket and the driven sprocket and is driven and connected to the table assembly. The table assembly is used to place the sheet material to be processed.

[0004] However, the table assembly is driven by a conveyor chain, and there are minute gaps (typically about 0.1-0.5 mm / link) at the hinges of the conveyor chain. In long-distance conveying scenarios (typically 5-10m) in laser cutting machines, the cumulative error caused by the conveyor chain gaps can reach several millimeters. When the system is under load, the gap effect exhibits a distributed cumulative characteristic: the second drive sprocket must first overcome the local gaps in the conveyor chain links before it can drive the table assembly. Under heavy loads, these gaps may cause significant changes in the length of the conveyor chain, resulting in non-uniform movement of the table assembly along its length. This asynchronous movement can easily cause relative movement between the table assembly and the sheet material, leading to scratches on the sheet surface and affecting processing quality. Summary of the Invention

[0005] This invention provides a conveying device for a laser cutting machine, which aims to solve the problem in related technologies where the table assembly may slide relative to the sheet material during conveying, causing scratches on the sheet material surface.

[0006] The application discloses a conveying device for a laser cutting machine, which comprises a support assembly, a table top assembly and a driving assembly. The table top assembly comprises first and second rack plates arranged alternately and used for supporting a plate. The driving assembly comprises a cam driving shaft, which comprises a plurality of columnar cams used for driving the first and second rack plates correspondingly. The columnar cams corresponding to the first and second rack plates are installed at an angle interval of 180 degrees. The conveying device further comprises a lifting assembly used for controlling the first and second rack plates to lift alternately between a top dead center and a bottom dead center. When the first rack plate moves to the top dead center and moves in the plate conveying direction, the second rack plate is at the bottom dead center and moves in the opposite direction. When the second rack plate moves to the top dead center and moves in the plate conveying direction, the first rack plate is at the bottom dead center and moves in the opposite direction. When the first or second rack plate moves from the top dead center to the bottom dead center, the first and second rack plates are at the position of the top dead center.

[0007] The effect is that the first and second rack plates supporting the plate are provided alternately, the first and second rack plates move alternately under the corresponding columnar cams, the first or second rack plate supports the plate at the position of the top dead center, and the other second or first rack plate moves reversely at the bottom dead center. The first and second rack plates complete the plate conveying alternately, the first and second rack plates are driven by the cam driving shaft, each first or second rack plate is driven by one columnar cam, and no gap is accumulated between the first and second rack plates, so that the first or second rack plate is prevented from scratching the surface of the plate when supporting the plate, the scratch on the surface of the plate is reduced, and the situation that several first rack plates support the plate and the other first rack plates slide relative to the plate is avoided. The phase difference between the columnar cams corresponding to the first and second rack plates is 180 degrees, so that the first and second rack plates are accurately moved in the opposite directions in the process of synchronous rotation, and the relative moving distance is accurate. When the first or second rack plate moves from the top dead center to the bottom dead center, the first and second rack plates are at the position of the top dead center, the first or second rack plate has completed the support of the plate before resetting at the bottom dead center, the plate is maintained at the same height, the stable conveying of the plate is ensured, and the plate does not need to move up and down, so that the displacement deviation or vibration scratch caused by the height difference is avoided.

[0008] Preferably, the two ends of the first and second rack plates are provided with connecting seats, the connecting seat comprises a lifting rod and a horizontal moving base, the lifting rod is vertically arranged and is slidingly connected to the horizontal moving base, the first and second rack plates are fixed to the lifting rods of the connecting seats, the lifting assembly drives the first and second rack plates to move up and down by driving the lifting rods, and the horizontal moving base is horizontally driven by the columnar cam.

[0009] The effect is that the connecting seat comprises the lifting rod and the horizontal moving base, the horizontal moving base is horizontally driven by the columnar cam, the lifting rod is vertically arranged, the first and second rack plates are respectively fixed to the corresponding lifting rods, the lifting assembly drives the first and second rack plates to lift by driving the lifting rods, thereby completely decoupling the horizontal movement and the vertical movement of the first and second rack plates, eliminating the energy loss and structural deformation caused by the compound motion, and ensuring the trajectory of the first and second rack plates.

[0010] Preferably, the lifting assembly comprises a synchronous driving rod and a linear driving piece, the synchronous driving rod is horizontally arranged, a driving groove is formed in the synchronous driving rod, the driving groove has a horizontal section, a roller is installed on the lifting rod, the roller is in the driving groove, and the linear driving piece drives the lifting rod to move up and down through the synchronous driving rod.

[0011] The effect is that the linear driving piece drives the synchronous driving rod to move, the driving groove is arranged on the synchronous driving rod, the roller on the lifting rod is in the driving groove, the roller is lifted by the position movement of the driving groove, the synchronous driving rod can synchronously move under the action of the linear driving piece, and the roller can reduce the friction between the lifting rod and the synchronous driving rod. The horizontal section of the driving groove can make the roller roll along the horizontal section of the driving groove when the lifting rod moves horizontally.

[0012] Preferably, the driving groove is Z-shaped, the synchronous driving rod is horizontally slidingly arranged through a support rail fixed to a support assembly, the linear driving piece drives the synchronous driving rod to move horizontally, and the roller drives the lifting rod to move up and down when moving along the middle inclined part of the driving groove.

[0013] The effect is that the driving groove is Z-shaped, the linear driving piece can horizontally move the synchronous driving rod, at this time, the support rail is used to bear the gravity of the plate material, deformation is reduced, thereby ensuring that the first and second rack plates support the plate material, the linear driving piece drives the synchronous driving rod to move horizontally, so that the roller moves along the middle inclined position of the driving groove, and the lifting rod is lifted or lowered.

[0014] Preferably, the driving groove is a straight line, the linear driving piece drives the synchronous driving rod to vertically move up and down, so that the roller drives the lifting rod to move up and down.

[0015] Preferably, a sliding groove is arranged on the horizontal moving base, the length direction of the sliding groove is parallel to the conveying direction of the board, a sliding block is slidingly arranged in the sliding groove, the lifting rod is vertically slidingly connected to the sliding block, and a spring is arranged at each end of the sliding block along the conveying direction of the board.

[0016] The effect is that the sliding block is horizontally slidingly connected in the sliding groove. When the first rack plate or the second rack plate drives the board to move horizontally or stop, the cylindrical cam converts the reverse inertia kinetic energy generated by the first rack plate or the second rack plate into elastic potential energy at the instant of reversing by using the pre-tightening force of the spring. This reduces the situation that the board cannot move synchronously with the first rack plate or the second rack plate due to excessive acceleration of the sliding block, thereby helping to reduce the scratches generated on the surface of the board.

[0017] Preferably, the cam driving shaft further comprises an inner rod and an adjusting sleeve, the inner rod has a polygonal cross section, and the cylindrical cam and the adjusting sleeve are alternately arranged on the inner rod.

[0018] The effect is that the cylindrical cam and the adjusting sleeve are alternately arranged on the inner rod, so that the installation of the cam driving shaft is relatively simple, and the position of the cylindrical cam can be accurately adjusted through the adjusting sleeve.

[0019] Preferably, the support assembly comprises a hollow longitudinal beam, a sliding rail is arranged in the longitudinal beam, the sliding rail comprises an outer U-shaped frame, an inner U-shaped frame and a rolling body, the outer U-shaped frame is fixed in the inner part of the longitudinal beam, the inner U-shaped frame is in the outer U-shaped frame, and the two ends of the inner U-shaped frame each have a blocking part bent inward, a V-shaped groove matched with the rolling body is arranged on the side wall of the horizontal moving base, and the rolling body is kept in abutment with the outer U-shaped frame through the inner U-shaped frame.

[0020] The effect is that the outer U-shaped frame is fixed in the inner part of the longitudinal beam, and the inner U-shaped frame is in the outer U-shaped frame, and the rolling body is rollingly connected in the V-shaped groove, so that the entire sliding rail is in the longitudinal beam, and the influence of sundries on the sliding rail is reduced. The two ends of the inner U-shaped frame are bent inward, so that the inner U-shaped frame and the horizontal moving base maintain a correct alignment relationship and are prevented from being accidentally separated.

[0021] Preferably, the upper end of the lifting rod is provided with a mounting arm, one end of the mounting arm is fixed on the lifting rod, the other end penetrates through the longitudinal beam and is fixedly provided with a clamping block, a vertical clamping groove is arranged on the clamping block, the lower end of the clamping groove is blocked, and the upper end penetrates, and the end of the first rack plate and the second rack plate is inserted into the clamping groove from top to bottom.

[0022] The effect is that the lower end of the clamping groove is blocked, and the upper end penetrates, so that the first rack plate and the second rack plate can be directly inserted into the clamping groove, and the first rack plate and the second rack plate can be conveniently replaced.

[0023] Preferably, the length direction of the cam driving shaft is connected with at least one driving motor.

[0024] The effect is that the driving motor is used to drive the cam driving shaft, when two or more driving motors are simultaneously started, the deformation resistance of the inner rod can be increased, the synchronous rotation of the driving motor and the cam driving shaft is ensured, and the displacement of the plate relative to the first rack plate or the second rack plate is prevented.

[0025] By adopting the technical scheme, the application has the following beneficial effects:

[0026] The effect is that the first rack plate and the second rack plate are alternately moved on the corresponding columnar cams, the first rack plate or the second rack plate bears the plate at the top dead center position, and the other second rack plate or first rack plate is reversely moved to reset at the bottom dead center position, so that each first rack plate or second rack plate is driven by one columnar cam, the gap accumulation of the first rack plate or the second rack plate is prevented, the scratching of the plate surface by the first rack plate or the second rack plate is reduced, the columnar cams and the adjusting sleeves are alternately arranged on the inner rod, the installation of the cam driving shaft is simple, and the position of the columnar cam can be accurately adjusted by the adjusting sleeve. The sliding block is horizontally slidably connected in the sliding groove. When the first rack plate or the second rack plate drives the plate to move or stop, the columnar cam converts the reverse inertia kinetic energy of the first rack plate or the second rack plate into elastic potential energy at the instant of reversing by using the pre-tightening force of the spring. This reduces the situation that the plate cannot move synchronously with the first rack plate or the second rack plate due to the excessive acceleration of the sliding block, thereby helping to reduce the scratches on the plate surface. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic diagram of a laser cutting machine in an embodiment of the application;

[0028] Figure 2 is a three-dimensional schematic diagram of a conveying device for a laser cutting machine in an embodiment of the application;

[0029] Figure 3 is a structural schematic diagram of the inside of a longitudinal beam in an embodiment of the application;

[0030] Figure 4 is a position schematic diagram of a first rack plate and a second rack plate in an embodiment of the application;

[0031] Figure 5 is a connection structure schematic diagram of a lifting assembly in an embodiment of the application;

[0032] Figure 6 is a structural schematic diagram of a clamping block in an embodiment of the application;

[0033] Figure 7 This is a schematic diagram of the slide rail structure in an embodiment of the present invention;

[0034] Figure 8 This is a perspective view of the horizontally movable base in an embodiment of the present invention;

[0035] Figure 9 yes Figure 7 A cross-sectional view along the AA direction;

[0036] Figure 10 This is a schematic diagram of the structure of the driving component in an embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the lifting assembly in another embodiment of the present invention.

[0038] Figure label:

[0039] 11. Frame; 12. Moving gantry; 13. Laser cutting head; 2. Support assembly; 21. Crossbeam; 22. Longitudinal beam; 221. Clearance groove; 3. Table assembly; 31. First rack plate; 32. Second rack plate; 4. Drive assembly; 41. Drive motor; 42. Cam drive shaft; 421. Inner rod; 422. Columnar cam; 423. Adjusting sleeve; 43. Mounting hole; 44. Connector; 5. Lifting assembly; 51. Synchronous drive rod; 52. Linear drive Components; 53. Support rail; 54. Drive groove; 6. Connecting seat; 61. Lifting rod; 62. Horizontal moving base; 621. Slide groove; 622. Slider; 623. Linear bearing; 624. Spring; 625. End cover; 626. Long groove; 63. Mounting arm; 64. Snap-fit ​​block; 641. Snap-fit ​​groove; 65. Horizontal rod; 66. Roller; 7. Slide rail; 71. Outer U-shaped frame; 72. Inner U-shaped frame; 721. Blocking part; 73. Rolling element; 74. V-groove. Detailed Implementation

[0040] The following is combined Figures 1 to 11 Embodiments of the present invention will be described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0041] This embodiment discloses a conveying device for a laser cutting machine, such as... Figure 1 and Figure 2As shown, the device is used for a laser cutting machine, which comprises a support assembly 2, a table assembly 3 and a driving assembly 4. The laser cutting machine comprises a rack 11, a movable gantry 12 is installed on the rack 11 and moves along the length direction of the rack 11, and a laser cutting head 13 is arranged on the movable gantry 12. The support assembly 2 is fixed on the rack 11, and the table assembly 3 is connected to the rack 11 through the support assembly 2. The table assembly 3 is horizontally arranged and extends along the length direction of the rack 11. The table assembly 3 is located directly below the laser cutting head 13, and the upper surface of the table assembly 3 is used to place the plate to be cut. The driving assembly 4 is used to drive the table assembly 3, so that the plate on the table assembly 3 moves along the length direction of the table assembly 3 and can reach the cutting position of the laser cutting head 13. In the process of moving the plate from one end of the table assembly 3 to the other end, on the one hand, the plate needs to be started and stopped, and on the other hand, when the plate reaches the cutting position, it may move beyond the predetermined position due to mechanical inertia, and at this time, the plate also needs to move reversely.

[0042] Reference Figure 2 And Figure 3 The support assembly 2 comprises a cross beam 21 and longitudinal beams 22. The longitudinal beams 22 are two and arranged in parallel. The cross beam 21 is perpendicular to the longitudinal beams 22 and is welded and fixed at both ends of the two longitudinal beams 22. The table assembly 3 comprises a plurality of rack plates. The length direction of the rack plates is perpendicular to the longitudinal beams 22. When the support assembly 2 is installed on the rack 11, the longitudinal beams 22 are parallel to the length direction of the rack 11. The plurality of rack plates are arranged in intervals along the length direction of the longitudinal beams 22. Adjacent two rack plates are a first rack plate 31 and a second rack plate 32, respectively. That is, the first rack plate 31 and the second rack plate 32 are arranged alternately when the plurality of rack plates are arranged. The side of the rack plate in the form of teeth is vertically upward and is used to support the plate. The driving assembly 4 is installed on the longitudinal beams 22. The driving assembly 4 alternately drives the first rack plate 31 and the second rack plate 32 to move in opposite directions. That is, when the first rack plate 31 moves along the conveying direction of the plate, the second rack plate 32 moves in the opposite direction of the conveying direction of the plate; or when the second rack plate 32 moves along the conveying direction of the plate, the first rack plate 31 moves in the opposite direction of the conveying direction of the plate. The first rack plate 31 and the second rack plate 32 are also connected with a lifting assembly 5. The lifting assembly 5 is used to control the vertical position of the first rack plate 31 and the second rack plate 32. The highest points of the first rack plate 31 and the second rack plate 32 are the same and are upper stop points. The lowest points of the first rack plate 31 and the second rack plate 32 are the same and are lower stop points. In the process of moving the plate, the first rack plate 31 and the second rack plate 32 are alternately moved to the position of the upper stop point by the lifting assembly 5 to support the lower surface of the plate, and when the first rack plate 31 or the second rack plate 32 moves along the conveying direction of the plate, the other second rack plate 32 or first rack plate 31 is at the position of the lower stop point.

[0043] In order to ensure that the height of the plate remains unchanged during the conveying process, when the first rack plate 31 or the second rack plate 32 starts to move to the lower stop point, the first rack plate 31 and the second rack plate 32 should be at the upper stop point position, that is, before the second rack plate 32 moves to the lower stop point, it must be ensured that the first rack plate 31 has moved from the lower stop point position to the upper stop point position; or before the first rack plate 31 moves to the lower stop point, it must be ensured that the second rack plate 32 has moved from the lower stop point position to the upper stop point position.

[0044] With reference to Figure 4 and Figure 5 , the lifting assembly 5 includes a synchronous driving rod 51 and a linear driving part 52, one lifting assembly 5 is connected at both ends of all the first rack plates 31, and one lifting assembly 5 is connected at both ends of all the second rack plates 32, the synchronous driving rod 51 is parallel to the longitudinal beam 22, and in this embodiment, the longitudinal beam 22 is a square tube profile, and the synchronous driving rod 51 is inside the longitudinal beam 22. A support rail 53 is fixedly arranged inside the longitudinal beam 22, and the support rail 53 is parallel to the longitudinal beam 22 and is fixedly connected with the longitudinal beam 22 by bolts. The support rail 53 is fixed on both vertical side walls of the longitudinal beam 22, and the synchronous driving rods 51 of the two lifting assemblies 5 are slidingly connected on the support rail 53. The support rail 53 and the synchronous driving rod 51 have a structure with low friction, such as a ball, between them. The linear driving part 52 can be a hydraulic cylinder, a pneumatic cylinder, or an electric cylinder. The linear driving part 52 is fixed on the side wall of the longitudinal beam 22, and one end of the synchronous driving rod 51 is fixed on the output end of the linear driving part 52, so that the linear driving part 52 drives the synchronous driving rod 51 to move horizontally along the support rail 53. A driving groove 54 is formed on the side wall of the synchronous driving rod 51, and the driving groove 54 is used to drive the rack plate to lift. All the first rack plates 31 are lifted by the same synchronous driving rod 51, and all the second rack plates 32 are lifted by another synchronous driving rod 51. The driving groove 54 is Z-shaped. When the linear driving part 52 drives the synchronous driving rod 51 to move horizontally, the first rack plate 31 and the second rack plate 32 are driven by different synchronous driving rods 51 and move along the Z-shaped track of the driving groove 54 to reach the upper stop point or the lower stop point. Since the weight of the plate placed on the rack plate is transmitted to the support rail 53 through the synchronous driving rod 51, and the support rail 53 is fixed on the longitudinal beam 22, the deformation of the synchronous driving rod 51 under stress can be reduced, and the stability can be improved.

[0045] With reference to Figure 5 and Figure 6The two ends of the rack plate are provided with a connecting seat 6, which is used to connect the lifting assembly 5 and the driving assembly 4. The connecting seat 6 comprises a lifting rod 61 and a horizontal moving base 62. The lifting rod 61 is vertically arranged, the lower end of the lifting rod 61 is used to be connected to the horizontal moving base 62, and the upper end is fixedly provided with a mounting arm 63. One end of the mounting arm 63 is fixed with the lifting rod 61 in a threaded connection or welding manner, the other end is fixedly provided with a clamping block 64, the clamping block 64 is provided with a vertical clamping groove 641, the lower end of the clamping groove 641 is blocked, the upper end penetrates, and the clamping groove 641 is located on the side wall of the clamping block 64 facing the rack plate. The width of the clamping groove 641 is equal to the thickness of the rack plate. The rack plate is inserted into the clamping groove 641 from top to bottom for fixation, which facilitates the installation and replacement of the rack plate. Figure 3 A displacement groove 221 for passing through the mounting arm 63 is arranged on the side wall of the longitudinal beam 22. The height of the displacement groove 221 can meet the up-down moving distance of the mounting arm 63, and the horizontal width of the displacement groove 221 can meet the reciprocating moving distance of the mounting arm 63 along the length direction of the longitudinal beam 22. The mounting arm 63 is disconnected from the middle part and fixedly connected through a flange, and the position of the flange is inside the longitudinal beam 22. During installation, one end of the mounting arm 63 is installed together with the connecting seat 6 inside the longitudinal beam 22, and the other end is butt-jointed through the flange from the position of the displacement groove 221, which facilitates the installation. The connecting seat 6 is entirely located inside the longitudinal beam 22, which can protect the connecting seat 6, reduce the maintenance frequency, and improve the operation accuracy.

[0046] A horizontal rod 65 is fixedly arranged on the side wall of the lifting rod 61, and a roller 66 is installed on the horizontal rod 65. The roller 66 is located in the driving groove 54, so that when the roller 66 moves in the driving groove 54, the friction is reduced. When the rack plate needs to be horizontally moved, the roller 66 on the lifting rod 61 moves at the horizontal position of the two ends of the driving groove 54; when the rack plate needs to be adjusted in position, the roller 66 rolls along the inclined position of the middle part of the driving groove 54.

[0047] Reference Figure 7 , Figure 8 and Figure 9The lower part of the horizontal moving base 62 is used for connecting the driving assembly 4, and the upper part is provided with a sliding groove 621, the length direction of the sliding groove 621 is parallel to the horizontal moving direction of the rack plate, and a sliding block 622 is arranged in the sliding groove 621 in a sliding fit. The middle part of the sliding block 622 is used for penetrating the lifting rod 61, and the outer part of the lifting rod 61 is sleeved with a linear bearing 623, the linear bearing 623 is fixed on the sliding block 622, and the friction between the lifting rod 61 and the sliding block 622 can be reduced through the linear bearing 623. Meanwhile, one spring 624 is arranged at each end of the sliding block 622 along the horizontal moving direction of the rack plate, the axis of the spring 624 is parallel to the horizontal moving direction of the rack plate, one end of the spring 624 abuts against the side wall of the sliding block 622, and the other end is provided with an end cover 625, the end cover 625 is fixed on the side wall of the horizontal moving base 62, and the spring 624 is inside the sliding groove 621. The two springs 624 have the same pre-tightening force and abut against the sliding block 622. When the sliding block 622 moves along the sliding groove 621, the elastic force of one spring 624 increases, and the elastic force of the other spring 624 decreases, the elastic force of the two springs 624 is used for driving the sliding block 622 to reset to the middle position of the horizontal moving base 62. In order to prevent the lifting rod 61 from rotating horizontally, the lower end of the lifting rod 61 is provided with a rectangular cross section, and a long groove 626 for inserting the lower end of the lifting rod 61 is arranged in the inside of the horizontal moving base 62, the distance between the two opposite side walls of the lower end of the lifting rod 61 is equal to the width of the long groove 626, so that the lifting rod 61 can slide along the long groove 626 without rotating.

[0048] Reference Figure 9 and Figure 10The driving assembly 4 comprises a driving motor 41 and a cam driving shaft 42, the cam driving shaft 42 comprises an inner rod 421, a plurality of columnar cams 422 and an adjusting sleeve 423, the inner rod 421 is rectangular or polygonal in cross section, is rotationally arranged inside the longitudinal beam 22 and is parallel to the longitudinal beam 22, and the driving motor 41 drives the inner rod 421 to rotate through a speed reducer. The columnar cams 422 are arranged in a plurality of numbers, one columnar cam 422 corresponds to each rack plate, the columnar cams 422 corresponding to the first rack plate 31 and the second rack plate 32 are installed at an angle interval of 180 degrees, the inner holes of the columnar cams 422 are matched with the inner rod 421, and the adjusting sleeve 423 is between two columnar cams 422. When installed, the columnar cams 422 and the adjusting sleeve 423 are alternately sleeved on the inner rod 421 in sequence, so that the cam driving shaft 42 can be assembled. When the inner rod 421 rotates, the plurality of columnar cams 422 rotate coaxially and simultaneously drive the first rack plate 31 and the second rack plate 32 to move in opposite directions. The lower part of the horizontal moving base 62 is provided with a mounting hole 43, the columnar cam 422 is located in the mounting hole 43, a connecting piece 44 is inserted into the side wall of the horizontal moving base 62, one end of the connecting piece 44 is located in the contour groove of the columnar cam 422, the connecting piece 44 moves along the contour groove of the columnar cam 422, so that the columnar cam 422 can drive the horizontal moving base 62 to move horizontally.

[0049] With reference to Figure 3 and Figure 7 The longitudinal beam 22 is provided with a slide rail 7 for mounting the horizontal moving base 62, the slide rail 7 comprises an outer U-shaped frame 71, an inner U-shaped frame 72 and a rolling body 73, the outer U-shaped frame 71 is a long strip structure in U-shaped cross section, is inserted into the longitudinal beam 22 along the length direction of the longitudinal beam 22, and the two sides of the outer U-shaped frame 71 are provided with horizontal rolling tracks for rolling of the rolling body 73, the inner U-shaped frame 72 is a retaining frame of the rolling body 73, the inner U-shaped frame 72 is provided with holes for mounting of the rolling body 73, the inner U-shaped frame 72 is inside the outer U-shaped frame 71, and each inner U-shaped frame 72 corresponds to one horizontal moving base 62, and the outer U-shaped frame 71 has a plurality of inner U-shaped frames 72. The two ends of the inner U-shaped frame 72 are both provided with a blocking portion 721 bent inward, so as to block the horizontal moving base 62 from being separated from the inner U-shaped frame 72. The two opposite side walls of the horizontal moving base 62 are both provided with a V-shaped groove 74, and the rolling body 73 is rolling connected in the V-shaped groove 74, so that the horizontal moving base 62 can be stably connected in the longitudinal beam 22 through the cam driving shaft 42 and the two rows of rolling bodies 73, and the friction between the horizontal moving base 62 and the longitudinal beam 22 can be reduced through the rolling body 73.

[0050] The working process of the embodiment is as follows: first, during the cutting of the plate, the first rack plate 31 and the second rack plate 32 are moved to the upper dead point position by the lifting assembly 5, so that the first rack plate 31 and the second rack plate 32 jointly support the plate. During the conveying of the plate, the second rack plate 32 is first moved horizontally by the corresponding synchronous drive rod 51, so that the roller 66 on the lifting rod 61 rolls along the inclined part of the drive groove 54, and the second rack plate 32 is lowered to the lower dead point position as the lifting rod 61 descends. At this time, the cam drive shaft 42 rotates under the action of the drive motor 41, and the corresponding cylindrical cam 422 of the first rack plate 31 and the second rack plate 32 rotates, and the corresponding cylindrical cam 422 of the first rack plate 31 pushes the first rack plate 31 to move in the conveying direction of the plate, and the second rack plate 32 moves in the opposite direction, so that the first rack plate 31 can drive the plate to move horizontally for a distance; then, the second rack plate 32 is moved horizontally by the corresponding synchronous drive rod 51 again, so that the roller 66 on the lifting rod 61 rolls along the inclined part of the drive groove 54, thereby driving the second rack plate 32 to move from the lowest point to the highest position; when the second rack plate 32 is also at the upper dead point position, the corresponding synchronous drive rod 51 of the first rack plate 31 can be moved horizontally, so that the lifting rod 61 connected to the first rack plate 31 moves downward under the action of the roller 66, and the first rack plate 31 moves to the lower dead point position. At this time, the cam drive shaft 42 rotates again under the action of the drive motor 41, and the first rack plate 31 will move in the opposite direction of the conveying direction of the plate under the action of the corresponding cylindrical cam 422, and the second rack plate 32 will drive the plate to move again in the conveying direction of the plate for a distance, and then the second rack plate 32 is restored to the upper dead point position by the lifting assembly 5. Repeating the above process several times can continuously convey the plate in the same direction. Since each cylindrical cam 422 separately conveys one rack plate and does not accumulate deviation, each rack plate can directly convey the plate without the need to eliminate the accumulated gap, so that the rack plate conveying does not slide relative to the surface of the plate, reducing the scratching of the surface of the plate. During the conveying process, when the rack plate drives the plate to move, the slider 622 will lag relative to the horizontal moving base 62 under the action of the inertial force, and the spring 624 at the rear end of the slider 622 in the plate conveying direction is first compressed, so that the possibility of relative sliding between the plate and the rack plate caused by excessive inertial force of the plate can be reduced. If continuous conveying is adopted for the plate in other embodiments, when the rack plate moves from the bottom to the position abutting against the plate, the plate can also drive the rack plate to slide on the horizontal moving base 62 through the slider 622, so that the plate can move horizontally without stopping, but in a state of fluctuating speed.

[0051] In other embodiments, with reference to Figure 11The synchronous driving rod 51 is horizontally and movably arranged inside the longitudinal beam 22, the linear driving members 52 are fixed on the longitudinal beam 22 in vertical arrangement, the two ends of the synchronous driving rod 51 are connected to a linear driving member 52 respectively, the two linear driving members 52 move the synchronous driving rod 51 up and down simultaneously, and the driving grooves 54 on the synchronous driving rod 51 are arranged in horizontal one-letter shape.

[0052] In other embodiments, the length direction of the cam driving shaft 42 can be spaced apart from each other to arrange multiple synchronous driving motors 41, and the multiple driving motors 41 synchronously drive the same cam driving shaft 42.

[0053] Although the embodiments of the present application have been shown and described above, it should be understood by those skilled in the art that the above-mentioned embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-mentioned embodiments within the scope of the present application.

Claims

1. A conveyor device for a laser cutting machine, comprising a support assembly, a table assembly and a drive assembly, characterized in that, The table assembly comprises first and second rack plates arranged alternately and used for supporting the plate; The driving assembly comprises a cam driving shaft, which comprises a plurality of columnar cams used for driving the first and second rack plates correspondingly, the columnar cams corresponding to the first rack plates are angularly spaced 180° from the columnar cams corresponding to the second rack plates; The conveying device further comprises a lifting assembly used for controlling the first and second rack plates to lift alternately between a top dead center and a bottom dead center; When the first rack plate moves to the top dead center and moves in the plate conveying direction, the second rack plate is at the bottom dead center and moves in the opposite direction; when the second rack plate moves to the top dead center and moves in the plate conveying direction, the first rack plate is at the bottom dead center and moves in the opposite direction; and when the first or second rack plate moves from the top dead center to the bottom dead center, the first and second rack plates are at the position of the top dead center; Both ends of the first and second rack plates are provided with a connecting seat, which comprises a lifting rod and a horizontal moving base, the lifting rod is vertically arranged and is slidingly connected to the horizontal moving base, the first and second rack plates are fixed to the lifting rod of the connecting seat, the lifting assembly drives the first and second rack plates to move up and down by driving the lifting rod, and the horizontal moving base is horizontally driven by the columnar cams; The lifting assembly comprises a synchronous driving rod and a linear driving piece, the synchronous driving rod is horizontally arranged, a driving groove is formed in the synchronous driving rod, the driving groove has a horizontal section, a roller is mounted to the lifting rod, the roller is in the driving groove, and the linear driving piece drives the lifting rod to move up and down through the synchronous driving rod.

2. The conveyor device for a laser cutting machine according to claim 1, characterized in that, The driving groove is Z-shaped, the synchronous driving rod is slidingly arranged horizontally through a supporting rail fixed to the support assembly, the linear driving piece drives the synchronous driving rod to move horizontally, and the roller moves up and down along the middle inclined part of the driving groove.

3. The conveyor according to claim 1, wherein The driving groove is a straight line, the linear driving piece drives the synchronous driving rod to move up and down vertically, so that the roller drives the lifting rod to move up and down.

4. The conveyor device for a laser cutting machine according to any one of claims 1 to 3, characterized in that The horizontal moving base is provided with a sliding groove, the length direction of the sliding groove is parallel to the plate conveying direction, a sliding block is slidingly arranged in the sliding groove, the lifting rod is vertically slidingly connected to the sliding block, and the sliding block is provided with a spring at each end along the plate conveying direction, and the spring drives the sliding block to reset to the middle part of the sliding groove through pre-tightening force.

5. The conveyor device for a laser cutting machine according to any one of claims 1 to 3, characterized in that The cam driving shaft further comprises an inner rod and an adjusting sleeve, the inner rod has a polygonal cross section, and the columnar cams and the adjusting sleeve are alternately sleeved on the inner rod.

6. The conveyor as claimed in claim 1, wherein, The support assembly comprises a hollow longitudinal beam, the longitudinal beam is provided with a sliding rail, the sliding rail comprises an outer U-shaped frame, an inner U-shaped frame and a rolling body, the outer U-shaped frame is fixed to the inside of the longitudinal beam, the inner U-shaped frame is in the outer U-shaped frame, and the two ends of the inner U-shaped frame are provided with inwardly bent blocking parts, the sidewall of the horizontal moving base is provided with a V-shaped groove matched with the rolling body, and the rolling body is kept in abutment with the outer U-shaped frame through the inner U-shaped frame.

7. The conveyor according to claim 6, wherein The upper end of the lifting rod is provided with a mounting arm, one end of the mounting arm is fixed on the lifting rod, the other end penetrates through the longitudinal beam and is fixedly provided with a clamping block, a vertical clamping groove is formed in the clamping block, the lower end of the clamping groove is blocked, and the upper end penetrates, and the end portions of the first and second rack plates are inserted into the clamping groove from top to bottom.

8. The conveyor for a laser cutting machine of claim 1, wherein, The length direction of the cam driving shaft is connected with at least one driving motor.

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