Low-vibration double-sided processing machine tool

Abstract

The invention relates to the technical field of plate processing, in particular to a low-vibration double-sided processing machine tool which comprises a feeding platform, a discharging platform and an upper rack, vibration in the working process of the double-sided processing machine tool is optimized from two dimensions, on one hand, a universal transmission structure is introduced on the basis of an existing structure to serve as force transmission, and the included angle compensation function is achieved; the axis deviation of the input end and the output end is converted into a controllable rotation freedom degree, additional loads caused by installation errors or thermal deformation are eliminated, and meanwhile vibration amplitude fluctuation in the machining process can be restrained under included angle compensation. On the other hand, an upper material pressing and conveying structure is optimized, the length of a guide groove extends to the position tangent to a conveying chain wheel and a traction chain wheel, the polygon effect of the chain is eliminated, the chain wheel speed and the chain speed are consistent in direction and size at the meshing point, a similar annular structure is constructed, and vibration during high-speed operation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet processing, and specifically, to a low-vibration double-sided processing machine tool. Background Art

[0002] In the field of machining, a planer, as a high-precision cutting device, is widely used in the machining of flat surfaces, formed surfaces, and complex contours of sheets. Its core performance indicators directly depend on the stability and dynamic characteristics of the transmission system. However, the feeding systems of current mainstream planers generally adopt rigid couplings, gearboxes, or belt drive structures.

[0003] This kind of drive structure has poor tolerance to axial offset or angular deviation, resulting in periodic impacts during the transmission process, directly affecting the contact stability between the tool and the workpiece, causing poor surface waviness of the machining, and at the same time, long-term vibration accelerates the wear of transmission components, and the cumulative dynamic transmission error reduces the positioning accuracy.

[0004] Common solutions are to reduce the system's natural frequency by strengthening the bed casting material or increasing the counterweight, but this leads to an increase in equipment weight and cost, and the vibration suppression effect for high frequencies is not good. Some install rubber shock pads or hydraulic dampers, which can absorb some vibration energy, but will introduce hysteretic response and affect the accuracy of dynamic tracking. Summary of the Invention

[0005] The purpose of the present invention is to provide a low-vibration double-sided processing machine tool for the above-mentioned existing problems.

[0006] The technical solution adopted by the present invention is as follows. A low-vibration double-sided processing machine tool includes a feeding platform, a discharging platform, and an upper frame. The upper frame is erected above the feeding platform and the discharging platform. An upper processing tool is arranged inside the upper frame. A lower processing tool is arranged between the feeding platform and the discharging platform, and the sheet to be processed can be conveyed from the feeding platform to the discharging platform. One side of the upper frame is provided with a feeding drive box, and an upper pressure-feeding and conveying structure is arranged inside the upper frame. Along the conveying and processing direction of the sheet to be processed, the upper pressure-feeding and conveying structure is located in front of the upper processing tool. The upper pressure-feeding and conveying structure includes a conveying sprocket, a guide groove, a chain, a thimble fixing plate, and a traction sprocket. The chain is wound around the conveying sprocket and the traction sprocket, and the chain can pass through the guide groove, and the point where the chain exits the guide groove is located at the tangent points of the guide groove with the conveying sprocket and the traction sprocket. The thimble fixing plate is detachably connected to the chain, and the guide groove is connected to the inner wall of the upper frame;

[0007] Upper auxiliary feeding mechanisms are arranged on both sides of the upper processing tool;

[0008] A lower auxiliary feeding mechanism is arranged on the discharging platform;

[0009] A feeding drive box is provided with a feeding motor at its top.

[0010] The power output end of the feeding motor is connected to a transmission intermediate mechanism through a third transmission belt, and the transmission intermediate mechanism transmits the transmission to the upper pressing material conveying structure, the upper auxiliary feeding mechanism, and the lower auxiliary feeding mechanism respectively through a universal transmission structure.

[0011] Further, the upper auxiliary feeding mechanism includes a first front roller, a second front roller, a first rear roller, and a second rear roller.

[0012] The first front roller, the second front roller, the first rear roller, and the second rear roller are arranged side by side and parallel.

[0013] Along the conveying and processing direction of the plate to be processed, the first front roller is located in front of the second front roller.

[0014] Along the conveying and processing direction of the plate to be processed, the second rear roller is located behind the first rear roller.

[0015] The second front roller and the first rear roller are respectively located on both sides of the upper processing tool.

[0016] Further, the surfaces of the first front roller and the second front roller are matte, and the surfaces of the first rear roller and the second rear roller are smooth.

[0017] Further, the lower auxiliary feeding mechanism includes a first lower auxiliary feeding roller group and a second lower auxiliary feeding roller group.

[0018] The first lower auxiliary feeding roller group is arranged below the first front roller and the second front roller.

[0019] The second lower auxiliary feeding roller group is arranged below the first rear roller and the second rear roller.

[0020] Further, the first lower auxiliary feeding roller group includes a first lower auxiliary feeding driving roller and a first lower auxiliary feeding driven roller, and the first lower auxiliary feeding driving roller and the first lower auxiliary feeding driven roller are arranged side by side, and the first lower auxiliary feeding driving roller and the first lower auxiliary feeding driven roller are connected by a first hinge.

[0021] The second lower auxiliary feeding roller group includes a second lower auxiliary feeding driving roller and a second lower auxiliary feeding driven roller, and the second lower auxiliary feeding driving roller and the second lower auxiliary feeding driven roller are arranged side by side, and the second lower auxiliary feeding driving roller and the second lower auxiliary feeding driven roller are connected by a second hinge.

[0022] Further, the transmission intermediate mechanism includes a first transmission intermediate mechanism, a second transmission intermediate mechanism, and a third transmission intermediate mechanism.

[0023] The first transmission intermediate mechanism is used to transmit the drive to the upper material pressing and conveying structure;

[0024] The second transmission intermediate mechanism is used to receive the drive from the first transmission intermediate mechanism and transmit the drive to the first front roller, the second front roller, and the first lower auxiliary feeding roller group;

[0025] The third transmission intermediate mechanism is used to receive the drive from the second transmission intermediate mechanism and transmit the drive to the first rear roller, the second rear roller, and the second lower auxiliary feeding roller group.

[0026] Furthermore, the universal transmission structure includes a first universal transmission structure, a second universal transmission structure, a third universal transmission structure, a fourth universal transmission structure, a fifth universal transmission structure, a sixth universal transmission structure, and a seventh universal transmission structure.

[0027] Furthermore, the first transmission intermediate mechanism includes a transmission shaft, a reducer, and a first coupling;

[0028] One end of the transmission shaft is connected to the third conveyor belt, and the other end of the transmission shaft is connected to the power input end of the reducer;

[0029] The first power output end of the reducer is connected to the second transmission intermediate mechanism through a first coupling, and the second power output end of the reducer is connected to the conveying sprocket through a seventh universal transmission structure, and drives the upper material pressing and conveying structure to rotate via the conveying sprocket.

[0030] Furthermore, the second transmission intermediate mechanism includes a first turbine box, a first gear box, and a second coupling;

[0031] The first gear box is arranged on the first turbine box, the power input end of the first gear box is connected to the third power output end of the first turbine box, and the power output end of the first gear box is connected to the first lower auxiliary feeding driving roller through a first universal transmission structure;

[0032] The power input end of the first turbine box is connected to the first transmission intermediate mechanism, the first power output end of the first turbine box is connected to the first front roller through a third universal transmission structure, and the second power output end of the first turbine box is connected to the second front roller through a fourth universal transmission structure.

[0033] Furthermore, the third transmission intermediate mechanism includes a second turbine box and a second gear box;

[0034] The second gear box is arranged on the second turbine box, the power input end of the second gear box is connected to the third power output end of the second turbine box, and the power output end of the second gear box is connected to the second lower auxiliary feeding driving roller through a second universal transmission structure;

[0035] The power input end of the second turbine box is connected to the second transmission intermediate mechanism. The first power output end of the second turbine box is connected to the first rear roller through a fifth universal transmission structure, and the second power output end of the second turbine box is connected to the second rear roller through a sixth universal transmission structure.

[0036] The beneficial effects of the present invention at least include one of the following:

[0037] 1. On the basis of the existing structure, a universal transmission structure is introduced as the force transmission to realize the angle compensation function, convert the axis deviation between the input end and the output end into a controllable rotational freedom, eliminate the additional load caused by installation errors or thermal deformation. At the same time, under the angle compensation, the vibration amplitude fluctuation during the processing can be suppressed.

[0038] 2. The upper pressure feeding structure is optimized. The length of the guide groove is extended to the position tangent to the conveying sprocket and the traction sprocket, eliminating the chain polygon effect. At the meshing point, the sprocket speed and the chain speed are consistent in both direction and magnitude, constructing a structure similar to a ring structure and reducing the vibration during high-speed operation.

[0039] 3. By adopting the universal transmission structure, the torque density is increased, the transmission efficiency is guaranteed, and the performance attenuation caused by the aging of a large number of elastic elements is reduced or avoided.

[0040] 4. Due to the characteristic of rigid transmission of the universal transmission structure, the backlash can be suppressed, the positioning accuracy of the feeding system is improved, and the machining requirements of the machine tool planing can be met. Brief Description of the Drawings

[0041] Figure 1 It is a three-dimensional structure schematic diagram of a low-vibration double-sided machining machine tool.

[0042] Figure 2 It is a schematic diagram of one side structure of a low-vibration double-sided machining machine tool.

[0043] Figure 3 It is a schematic diagram of the other side structure of a low-vibration double-sided machining machine tool.

[0044] Figure 4 It is a schematic diagram of the transmission intermediate mechanism and the universal transmission structure.

[0045] Figure 5 It is a schematic diagram of the transmission intermediate mechanism and the universal transmission structure from another perspective.

[0046] Figure 6 It is a schematic diagram of a universal transmission structure.

[0047] Figure 7 It is a schematic diagram of the upper pressure feeding structure.

[0048] Figure 8It is a schematic diagram of the structure of the lower tool head indicator scale.

[0049] Figure 9 It is a schematic diagram of the structure of the transmission intermediate mechanism.

[0050] In the figure: 1 is the upper tool belt cover, 2 is the upper tool dust suction cover, 3 is the upper tool shaft motor, 4 is the first conveyor belt, 5 is the feeding motor, 6 is the feeding drive box, 7 is the control panel, 8 is the upper frame, 9 is the feeding platform, 10 is the lower tool head indicator scale, 11 is the lifting motor, 12 is the upper processing tool holder, 13 is the upper processing tool shaft, 14 is the lower processing tool shaft, 15 is the upper processing tool head, 16 is the discharging platform, 17 is the lifting table, 18 is the lifting limit switch, 19 is the lower tool shaft motor, 20 is the second conveyor belt, 21 is the lower processing tool head, 22 is the third conveyor belt, 23 is the transmission shaft, 24 is the reducer, 25 is the first coupling, 26 is the first gear box, 27 is the first turbine box, 28 is the second coupling, 29 is the second gear box, 30 is the second turbine box, 31 is the first universal transmission structure, 32 is the second universal transmission structure, 33 is the first lower auxiliary feeding driving roller, 34 is the second lower auxiliary feeding driving roller, 35 is the third universal transmission structure, 36 is the fourth universal transmission structure, 37 is the fifth universal transmission structure, 38 is the sixth universal transmission structure, 39 is the first front roller, 40 is the second front roller, 41 is the first rear roller, 42 is the second rear roller, 43 is the seventh universal transmission structure, 44 is the conveying sprocket, 45 is the first lower auxiliary feeding driven roller, 46 is the second lower auxiliary feeding driven roller, 47 is the first hinge, 48 is the second hinge, 49 is the first double cross shaft, 50 is the second double cross shaft, 51 is the connecting shaft, 52 is the upper pressure feeding conveying structure, 53 is the guide groove, 54 is the chain, 55 is the thimble fixing plate, 56 is the traction sprocket. Specific embodiments

[0051] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations.

[0052] Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative effort belong to the scope of protection of the present invention.

[0053] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0054] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it will not be necessary to further define and explain it in subsequent figures.

[0055] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use, or the orientation or positional relationship commonly understood by those skilled in the art. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0056] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0057] Such as Figures 1 to 3 、 Figure 7As shown in the figure, a low-vibration double-sided processing machine tool includes a feeding platform 9, a discharging platform 16, and an upper frame 8. The upper frame 8 is erected above the feeding platform 9 and the discharging platform 16. An upper processing tool is arranged inside the upper frame 8. A lower processing tool is arranged between the feeding platform 9 and the discharging platform 16, and the plate to be processed can be conveyed from the feeding platform 9 to the discharging platform 16. A feeding drive box 6 is arranged on one side of the upper frame 8. An upper pressure feeding and conveying structure 52 is arranged inside the upper frame 8. Along the conveying and processing direction of the plate to be processed, the upper pressure feeding and conveying structure 52 is located in front of the upper processing tool. The upper pressure feeding and conveying structure 52 includes a conveying sprocket 44, a guide groove 53, a chain 54, a thimble fixing plate 55, and a traction sprocket 56. The chain 54 is wound around the conveying sprocket 44 and the traction sprocket 56, and the chain 54 can pass through the guide groove 53. The passing point of the chain 54 from the guide groove 53 is located at the tangent point of the guide groove 53 with the conveying sprocket 44 and the traction sprocket 56. The thimble fixing plate 55 is detachably connected to the chain 54. The guide groove 53 is connected to the inner wall of the upper frame 8;

[0058] Upper auxiliary feeding mechanisms are arranged on both sides of the upper processing tool;

[0059] Lower auxiliary feeding mechanisms are arranged on the discharging platform 16;

[0060] A feeding motor 5 is arranged on the top of the feeding drive box 6,

[0061] The power output end of the feeding motor 5 is connected to a transmission intermediate mechanism through a third transmission belt 22, and the transmission intermediate mechanism transmits the transmission to the upper pressure feeding and conveying structure 52, the upper auxiliary feeding mechanism, and the lower auxiliary feeding mechanism respectively through a universal transmission structure.

[0062] The purpose of such a design is to introduce a universal transmission structure as the force transmission on the basis of the existing structure, realize the angle compensation function, convert the axis deviation between the input end and the output end into a controllable rotational degree of freedom, and eliminate the additional load caused by installation errors or thermal deformations.

[0063] Furthermore, the upper pressure feeding and conveying structure is optimized. The length of the guide groove is extended to the position tangent to the conveying sprocket and the traction sprocket, eliminating the chain polygon effect. At the meshing point, the sprocket speed and the chain speed are the same in both direction and magnitude, constructing a structure similar to a ring shape, and reducing the vibration during high-speed operation.

[0064] At the same time, it should be noted that for the double-sided processing machine tool provided in this application, in actual use, the raw material plate is placed on the feeding platform, and then the upper pressure feeding and conveying structure above it drives it to move towards the discharging platform under the drive of the feeding motor. First, the lower surface is processed by the lower processing tool, and then the upper surface is processed by the upper processing tool.

[0065] Such asFigure 8 As shown, in order to facilitate on-site workers to observe the descending height of the upper frame 8, a lower cutter head indicating scale is provided on the side of the feeding platform 9.

[0066] For the upper processing tool, it is arranged in the upper processing tool seat 12 at the tail of the upper frame 8. Usually, it includes an upper processing cutter head 15 and an upper processing tool shaft 13. Driven by the upper processing tool shaft 13, the upper processing cutter head 15 can perform rotary planing on the upper surface of the plate. At the same time, an upper tool shaft motor 3 is also arranged on the top of the upper frame. The power output end of the upper tool shaft motor 3 is connected to the upper processing tool shaft 13 via the first transmission belt 4, so that the upper tool shaft motor 3 can drive the upper processing tool shaft 13 to rotate.

[0067] It should also be noted that during the operation of the upper processing tool, a large amount of powder and chips will be generated. Therefore, an upper tool dust suction hood 2 is provided, which covers the upper processing tool and is externally connected to a dust suction mechanism. Correspondingly, an upper tool belt cover 1 is arranged outside the first transmission belt 4.

[0068] For the lower processing tool, it is arranged between the feeding platform and the discharging platform. Usually, it includes a lower processing cutter head 21 and a lower processing tool shaft 14. Driven by the lower processing tool shaft 14, the lower processing cutter head 21 can perform rotary planing on the lower surface of the plate. At the same time, a lower tool shaft motor 19 is arranged below the feeding platform and the discharging platform. The power output end of the lower tool shaft motor 19 is connected to the lower processing tool shaft 14 via the second transmission belt 20, so that the lower tool shaft motor 19 can drive the lower processing tool shaft 14 to rotate.

[0069] In actual use, according to the specific thickness of the processed plate, the distance between the upper frame and the feeding platform and the discharging platform will be adjusted. Therefore, a lifting motor 11, a lifting table 17 and a lifting limit switch 18 are provided. Among them, the lifting motor 11 can drive the lifting table 17 to rise or fall. The moving end of the lifting table 17 is connected to the upper frame, and the lifting limit switch 18 can sense the lifting position of the lifting table.

[0070] Furthermore, in order to control the entire control process and display parameters, a control panel 7 is also arranged on the upper frame.

[0071] In this embodiment, the upper auxiliary feeding mechanism includes a first front roller 39, a second front roller 40, a first rear roller 41 and a second rear roller 42;

[0072] The first front roller 39, the second front roller 40, the first rear roller 41 and the second rear roller 42 are arranged side by side and parallel;

[0073] Along the conveying and processing direction of the plate to be processed, the first front roller 39 is located in front of the second front roller 40;

[0074] The second rear roller 42 is located behind the first rear roller 41 along the conveying and processing direction of the to-be-processed plate.

[0075] The second front roller 40 and the first rear roller 41 are respectively located on both sides of the upper processing tool.

[0076] The purpose of such a design is that by arranging the front rollers and rear rollers on both sides of the upper processing tool, the extrusion and pushing forces on the processed plate during planing by the upper processing tool can be increased, enabling it to move smoothly towards the upper processing tool.

[0077] Meanwhile, in this embodiment, the surfaces of the first front roller 39 and the second front roller 40 are rough surfaces, and the surfaces of the first rear roller 41 and the second rear roller 42 are smooth surfaces.

[0078] It should be noted that the rough surface and the smooth surface here are a kind of popular description. The rough surface can be to coat a friction layer on the roller surface or use a pattern structure with a pattern that can increase the surface friction, which can increase the friction with the plate surface. After being planed by the upper processing tool, the plate surface is relatively smooth. Therefore, a smooth-surface rear roller is selected to reduce the damage to the surface of the processed plate and at the same time have a certain pushing force.

[0079] Meanwhile, in this embodiment, the lower auxiliary feeding mechanism includes a first lower auxiliary feeding roller group and a second lower auxiliary feeding roller group;

[0080] The first lower auxiliary feeding roller group is arranged below the first front roller 39 and the second front roller 40;

[0081] The second lower auxiliary feeding roller group is arranged below the first rear roller 41 and the second rear roller 42.

[0082] Furthermore, the first lower auxiliary feeding roller group includes a first lower auxiliary feeding driving roller 33 and a first lower auxiliary feeding driven roller 45, and the first lower auxiliary feeding driving roller 33 and the first lower auxiliary feeding driven roller 45 are arranged side by side. The first lower auxiliary feeding driving roller 33 and the first lower auxiliary feeding driven roller 45 are connected by a first hinge 47;

[0083] The second lower auxiliary feeding roller group includes a second lower auxiliary feeding driving roller 34 and a second lower auxiliary feeding driven roller 46, and the second lower auxiliary feeding driving roller 34 and the second lower auxiliary feeding driven roller 46 are arranged side by side. The second lower auxiliary feeding driving roller 34 and the second lower auxiliary feeding driven roller 46 are connected by a second hinge 48.

[0084] The purpose of such a design is that the first lower auxiliary feeding roller and the second lower auxiliary feeding roller are functionally adapted to the upper front rollers and rear rollers above, so that the to-be-processed plate can receive a uniform conveying force on the upper and lower surfaces, thereby being stably conveyed.

[0085] As Figure 4 , Figure 5 and Figure 9 shown, in this embodiment, a specific structure is provided for the transmission intermediate mechanism, including a first transmission intermediate mechanism, a second transmission intermediate mechanism, and a third transmission intermediate mechanism;

[0086] The first transmission intermediate mechanism is used to transmit the drive to the upper pressure feeding conveyor structure 52;

[0087] The second transmission intermediate mechanism is used to receive the drive from the first transmission intermediate mechanism and transmit the drive to the first front roller 39, the second front roller 40, and the first lower auxiliary feeding roller group;

[0088] The third transmission intermediate mechanism is used to receive the drive from the second transmission intermediate mechanism and transmit the drive to the first rear roller 41, the second rear roller 42, and the second lower auxiliary feeding roller group.

[0089] Meanwhile, the universal transmission structure includes a first universal transmission structure 31, a second universal transmission structure 32, a third universal transmission structure 35, a fourth universal transmission structure 36, a fifth universal transmission structure 37, a sixth universal transmission structure 38, and a seventh universal transmission structure 43.

[0090] Furthermore, the first transmission intermediate mechanism includes a transmission shaft 23, a speed reducer 24, and a first coupling 25;

[0091] One end of the transmission shaft 23 is connected to the third conveyor belt 22, and the other end of the transmission shaft 23 is connected to the power input end of the speed reducer 24;

[0092] The first power output end of the speed reducer 24 is connected to the second transmission intermediate mechanism through the first coupling 25, and the second power output end of the speed reducer 24 is connected to the conveying sprocket 44 through the seventh universal transmission structure 43, and drives the upper pressure feeding conveyor structure 52 to rotate via the conveying sprocket 44.

[0093] Meanwhile, the second transmission intermediate mechanism includes a first turbine box 27, a first gear box 26, and a second coupling 28;

[0094] The first gear box 26 is arranged on the first turbine box 27, the power input end of the first gear box 26 is connected to the third power output end of the first turbine box 27, and the power output end of the first gear box 26 is connected to the first lower auxiliary feeding driving roller 33 through the first universal transmission structure 31;

[0095] The power input end of the first turbine box 27 is connected to the first transmission intermediate mechanism. The first power output end of the first turbine box 27 is connected to the first front roller 39 through the third universal transmission structure 35, and the second power output end of the first turbine box 27 is connected to the second front roller 40 through the fourth universal transmission structure 36.

[0096] Finally, the third transmission intermediate mechanism includes a second turbine box 30 and a second gear box 29;

[0097] The second gear box 29 is arranged on the second turbine box 30. The power input end of the second gear box 29 is connected to the third power output end of the second turbine box 30, and the power output end of the second gear box 29 is connected to the second lower auxiliary feeding driving roller 34 through the second universal transmission structure 32;

[0098] The power input end of the second turbine box 30 is connected to the second transmission intermediate mechanism. The first power output end of the second turbine box 30 is connected to the first rear roller 41 through the fifth universal transmission structure 37, and the second power output end of the second turbine box 30 is connected to the second rear roller 42 through the sixth universal transmission structure 38.

[0099] The purpose of such a design is to adopt the universal transmission structure to achieve the improvement of torque density, ensure the transmission efficiency, and reduce or avoid the performance attenuation caused by the aging of the equipment due to the extensive use of elastic elements. The rigid transmission characteristic of the universal transmission structure can suppress the backlash, improve the positioning accuracy of the feeding system, and meet the requirements of the machine tool planing process.

[0100] It should be noted that in this embodiment, in order to ensure the stability of the entire conveying structure, the same feeding motor is used to drive the upper pressure feeding structure, the upper auxiliary feeding mechanism, and the lower auxiliary feeding mechanism. The internal structures of the involved speed reducers, gear boxes, and turbine boxes are all prior arts, and those skilled in the art can select appropriate structures according to specific scenarios during implementation.

[0101] As Figure 6 shown, this embodiment provides a specific composition of the universal transmission structure, which generally includes a first double cross shaft 49, a second double cross shaft 50, and a connecting shaft 51. Both ends of the connecting shaft 51 are respectively connected to the first double cross shaft 49 and the second double cross shaft 50, and the first double cross shaft 49 and the second double cross shaft 50 are respectively connected to the driving part and the driven part. In this way, through the angle compensation function of the universal joint composed of two sections of double cross shafts, the axis deviation between the driving part and the driven part is converted into a controllable rotational degree of freedom, eliminating the additional load caused by installation errors or thermal deformations. At the same time, the torque density is improved by the cooperation design of the cross shaft and the needle roller bearing in the double cross shaft structure.

[0102] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A low-vibration double-sided machining machine tool, comprising a feeding platform (9), a discharging platform (16) and an upper machine frame (8). The upper machine frame (8) is erected above the feeding platform (9) and the discharging platform (16). An upper processing tool is arranged inside the upper machine frame (8). A lower processing tool is arranged between the feeding platform (9) and the discharging platform (16). And a plate to be processed can be conveyed from the feeding platform (9) to the discharging platform (16). It is characterized in that, On one side of the upper machine frame (8), a feeding drive box (6) is provided. An upper material pressing and conveying structure (52) is arranged inside the upper machine frame (8). Along the conveying and processing direction of the to-be-processed plate, the upper material pressing and conveying structure (52) is located in front of the upper processing tool. The upper material pressing and conveying structure (52) includes a conveying sprocket (44), a guide groove (53), a chain (54), a thimble fixing plate (55), and a traction sprocket (56). The chain (54) is wound around the conveying sprocket (44) and the traction sprocket (56), and the chain (54) can pass through the guide groove (53). The point where the chain (54) exits from the guide groove (53) is located at the tangent point of the guide groove (53) with the conveying sprocket (44) and the traction sprocket (56). The thimble fixing plate (55) is detachably connected to the chain (54). The guide groove (53) is connected to the inner wall of the upper machine frame (8). Upper auxiliary feeding mechanisms are arranged on both sides of the upper processing tool; A lower auxiliary feeding mechanism is arranged on the discharge platform (16); A feeding motor (5) is arranged on the top of the feeding drive box (6); The power output end of the feeding motor (5) is connected to a transmission intermediate mechanism through a third transmission belt (22), and the transmission intermediate mechanism transmits the transmission to the upper material pressing and conveying structure (52), the upper auxiliary feeding mechanism, and the lower auxiliary feeding mechanism respectively through a universal transmission structure.

2. A low-vibration double-sided machining center according to claim 1, characterized in that: The upper auxiliary feeding mechanism includes a first front roller (39), a second front roller (40), a first rear roller (41), and a second rear roller (42); The first front roller (39), the second front roller (40), the first rear roller (41), and the second rear roller (42) are arranged side by side and in parallel; Along the conveying and processing direction of the to-be-processed plate, the first front roller (39) is located in front of the second front roller (40); Along the conveying and processing direction of the to-be-processed plate, the second rear roller (42) is located behind the first rear roller (41); The second front roller (40) and the first rear roller (41) are respectively located on both sides of the upper processing tool.

3. A low-vibration double-sided machining machine tool according to claim 2, characterized in that, The surfaces of the first front roller (39) and the second front roller (40) are rough surfaces, and the surfaces of the first rear roller (41) and the second rear roller (42) are smooth surfaces.

4. The low-vibration double-sided machining center according to claim 2, characterized in that: The lower auxiliary feeding mechanism includes a first lower auxiliary feeding roller group and a second lower auxiliary feeding roller group; The first lower auxiliary feeding roller group is arranged below the first front roller (39) and the second front roller (40); The second lower auxiliary feeding roller group is arranged below the first rear roller (41) and the second rear roller (42).

5. The low-vibration double-sided machining center according to claim 4, characterized in that: The first lower auxiliary feeding roller group includes a first lower auxiliary feeding driving roller (33) and a first lower auxiliary feeding driven roller (45), and the first lower auxiliary feeding driving roller (33) and the first lower auxiliary feeding driven roller (45) are arranged side by side. The first lower auxiliary feeding driving roller (33) and the first lower auxiliary feeding driven roller (45) are connected through a first hinge (47); The second lower auxiliary feeding roller group includes a second lower auxiliary feeding driving roller (34) and a second lower auxiliary feeding driven roller (46), and the second lower auxiliary feeding driving roller (34) and the second lower auxiliary feeding driven roller (46) are arranged side by side and are connected by a second hinge (48).

6. The low-vibration double-sided machining machine tool according to claim 5, characterized in that, The transmission intermediate mechanism includes a first transmission intermediate mechanism, a second transmission intermediate mechanism and a third transmission intermediate mechanism; The first transmission intermediate mechanism is used for transmitting the transmission to the upper pressing material conveying structure (52); The second transmission intermediate mechanism is used for receiving the transmission of the first transmission intermediate mechanism and transmitting the transmission to the first front roller (39), the second front roller (40) and the first lower auxiliary feeding roller group; The third transmission intermediate mechanism is used for receiving the transmission of the second transmission intermediate mechanism and transmitting the transmission to the first rear roller (41), the second rear roller (42) and the second lower auxiliary feeding roller group.

7. A low-vibration double-sided machining machine tool according to claim 6, characterized in that The universal transmission structure includes a first universal transmission structure (31), a second universal transmission structure (32), a third universal transmission structure (35), a fourth universal transmission structure (36), a fifth universal transmission structure (37), a sixth universal transmission structure (38) and a seventh universal transmission structure (43).

8. The low-vibration double-sided machining center according to claim 7, characterized in that: The first transmission intermediate mechanism includes a transmission shaft (23), a speed reducer (24) and a first coupling (25); One end of the transmission shaft (23) is connected to the third conveyor belt (22), and the other end of the transmission shaft (23) is connected to the power input end of the speed reducer (24); The first power output end of the speed reducer (24) is connected to the second transmission intermediate mechanism through the first coupling (25), and the second power output end of the speed reducer (24) is connected to the conveying sprocket (44) through the seventh universal transmission structure (43), and drives the upper pressing material conveying structure (52) to rotate through the conveying sprocket (44).

9. The low-vibration double-sided machining machine tool according to claim 7, characterized in that, The second transmission intermediate mechanism includes a first turbine box (27), a first gear box (26) and a second coupling (28); The first gear box (26) is arranged on the first turbine box (27), the power input end of the first gear box (26) is connected to the third power output end of the first turbine box (27), and the power output end of the first gear box (26) is connected to the first lower auxiliary feeding driving roller (33) through the first universal transmission structure (31); The power input end of the first turbine box (27) is connected to the first transmission intermediate mechanism, the first power output end of the first turbine box (27) is connected to the first front roller (39) through the third universal transmission structure (35), and the second power output end of the first turbine box (27) is connected to the second front roller (40) through the fourth universal transmission structure (36).

10. A low-vibration double-sided machining machine tool according to claim 7, characterized in that, The third transmission intermediate mechanism includes a second turbine box (30) and a second gear box (29); The second gearbox (29) is arranged on the second turbine box (30). The power input end of the second gearbox (29) is connected to the third power output end of the second turbine box (30). The power output end of the second gearbox (29) is connected to the second lower auxiliary feeding driving roller (34) through a second universal transmission structure (32). The power input end of the second turbine box (30) is connected to a second transmission intermediate mechanism. The first power output end of the second turbine box (30) is connected to the first rear roller (41) through a fifth universal transmission structure (37). The second power output end of the second turbine box (30) is connected to the second rear roller (42) through a sixth universal transmission structure (38).

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