Automatic lifting device of volcanic ash plate grinding machine

Abstract

The invention relates to the technical field of plate conveying, in particular to an automatic lifting device of a volcanic ash plate grinding machine, which comprises two symmetrically arranged brackets, a plurality of groups of conveying shafts arranged in parallel are rotatably connected between the two brackets, lifting grooves are formed in the sides of the two ends of each conveying shaft, and the lifting grooves are arranged on the brackets in a penetrating manner; lifting assemblies are arranged in the lifting grooves in a matched mode, a pressing shaft is rotationally connected between the opposite lifting assemblies, each lifting assembly comprises a lifting rod movably arranged in the corresponding lifting groove, the periphery of one end of each lifting rod is sleeved with a lifting gear in transmission connection with the corresponding synchronous gear, and the other end of each lifting rod is provided with a rotating bearing seat; the ends of the pressing shafts are rotationally connected into the two opposite rotating bearing seats, and cleaning mechanisms used for cleaning the surfaces of the conveying shafts are further arranged between the adjacent conveying shafts. The conveying shaft and the pressing shaft can be matched for positioning and clamping, and the surface of the conveying shaft is cleaned when the conveying shaft rotates.

Description

Technical Field

[0001] The invention relates to the technical field of plate conveying, in particular to an automatic lifting device for a volcanic ash plate grinding machine. Background Art

[0002] The existing PCB volcanic ash grinding operation is difficult to operate on thick plates; although some volcanic ash grinding machines can lift the plate, the lifting height is inconsistent and difficult to adjust; the equipment assembly varies from person to person; the equipment is inconvenient to maintain and requires high technical performance of maintenance personnel.

[0003] Chinese Patent Publication No.: CN105798715A discloses a pitch-adjustable grinding machine, including a frame and an upper grinding brush assembly, a lower grinding brush assembly, an upper rubber-coated assembly, a lower rubber-coated assembly and a grinding brush driving device. The frame is equipped with an upper grinding brush lifting assembly, a lower grinding brush lifting assembly and an upper rubber-coated lifting assembly for adjusting the lifting of the upper grinding brush assembly and the lower grinding brush assembly, respectively. The upper grinding brush assembly includes an upper grinding brush, and the upper grinding brush lifting assembly includes an upper grinding brush lifting assembly driving motor, an upper grinding brush lifting tooth box, and an upper lifting screw rod connected to the upper grinding brush lifting tooth box and fixed to the frame through a bearing fixing seat. The free end of the upper lifting screw rod is provided with an upper grinding brush lifting block through a screw rod nut matched therewith, and the upper grinding brush lifting block is fixed to both ends of the above-mentioned upper grinding brush.

[0004] In this solution, the brush spacing can be adjusted and the rubber-coated roller can be lifted. However, during use, due to long-term clamping and conveying, if impurities on the brush used for conveying and clamping cannot be cleaned in time, it will affect the processing effect of the PCB board. Summary of the invention

[0005] The object of the present invention is to provide an automatic lifting device for a volcanic ash grinding machine to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A volcanic ash grinding machine automatic lifting device comprises two symmetrically arranged brackets, a plurality of groups of parallel conveying shafts are rotatably connected between the two brackets, lifting grooves are arranged on the sides of both ends of the conveying shafts, the lifting grooves are through-arranged on the brackets, lifting components are matchedly arranged in the lifting grooves, and a clamping shaft is rotatably connected between the relative lifting components, the lifting component comprises a lifting rod movably arranged in the lifting grooves, a lifting gear connected to a synchronous gear transmission is sleeved on the outer periphery of one end of the lifting rod, a rotating bearing seat is installed on the other end of the lifting rod, the end of the clamping shaft is rotatably connected in two relative rotating bearing seats, and a cleaning mechanism for cleaning the surface of the conveying shaft is also provided between adjacent conveying shafts.

[0007] As a further solution of the present invention: a driving motor is installed on the bracket, and a synchronous shaft is rotatably connected to the output end of the driving motor. A synchronous gear is provided on the outer sleeve of the synchronous shaft that is transmission-connected to the lifting assembly. When the driving motor drives the synchronous shaft to rotate and the synchronous gear and the lifting assembly are matched, the lifting assembly drives the clamping shaft to move relative to the conveying shaft.

[0008] As a further solution of the present invention: the clamping shaft and the conveying shaft are arranged in a one-to-one correspondence.

[0009] As a further solution of the present invention: a lifting lower limit sensor and a lifting upper limit sensor are arranged on the upper and lower sides of the bracket, and the lifting lower limit sensor and the lifting upper limit sensor are both electrically connected to the driving motor.

[0010] As a further solution of the present invention: the lifting rod includes a screw rod rotatably connected in the lifting groove, the lifting gear fixing sleeve is arranged at one end of the screw rod, the outer periphery of the screw rod is threadedly connected with a rod sleeve, the end of the rod sleeve is slidably connected with a rotating bearing seat, the rotating bearing seat is slidably arranged in the lifting groove, and a spring is connected between the rotating bearing seat and one end of the lifting groove.

[0011] As a further solution of the present invention: a driving gear and a transmission gear are fixedly sleeved on the periphery of the ends of the conveying shaft and the clamping shaft, the driving gear and the transmission gear are meshed for transmission, and a first rubber-coated roller and a second rubber-coated roller are respectively sleeved on the periphery of the ends of the conveying shaft and the clamping shaft.

[0012] As a further solution of the present invention: the cleaning mechanism includes two symmetrically arranged mounting plates, a grid frame is fixedly connected between the two mounting plates, and a scraping component is rotatably connected between the two mounting plates and is slidably fitted with the edge of the grid frame. The scraping component is movably fitted with the first rubber-coated roller on the surface of the conveying shaft on the side away from the grid frame.

[0013] As a further solution of the present invention: mounting holes are provided through the four corners of the mounting plate, and a limiting driving member for driving the scraping assembly to rotate is slidably provided on the mounting plate.

[0014] As a further solution of the present invention: the scraping assembly includes a rotating shaft rotatably connected between two mounting plates, a rotating gear is fixedly sleeved at the end of the rotating shaft, a scraper is fixedly connected to the periphery of the rotating shaft, the scraper is fitted on the surface of the first rubber-coated roller, and the cross-section of the scraper is fan-shaped.

[0015] As a further solution of the present invention: arc scraping grooves are symmetrically embedded on both sides of the grid frame, and the arc scraping grooves are slidably fitted on the surface of the scraper. The outer surface radius of the scraper is the same as the radius of the arc scraping grooves. Installation shafts are symmetrically provided at both ends of the grid frame, and the ends of the installation shafts are provided through the installation plate.

[0016] As a further solution of the present invention: racks are symmetrically arranged on both sides of the limit driving member, and the racks are meshed with the rotating gear for transmission.

[0017] As a further solution of the present invention: sliding height limiting grooves are symmetrically provided on both sides of the limit driving member, and the sliding height limiting grooves are slidingly sleeved on the outer periphery of the end of the mounting shaft, and the extension direction of the sliding height limiting groove is the moving direction of the limit driving member. When the scraper is attached to the surface of the first rubber-coated roller, the end of the mounting shaft is located at the lower end of the sliding height limiting groove, and when the scraper is completely rotated into the arc-shaped scraping groove, the end of the mounting shaft is located at the upper end of the sliding height limiting groove.

[0018] As a further solution of the present invention: a rotation groove is embedded in the upper end of the limit driving member, a limit button is eccentrically rotated and connected in the rotation groove, and a limit groove aligned with the rotation groove is embedded in the upper end of the mounting plate.

[0019] Compared with the prior art, the beneficial effects of the present invention are: through the induction of the lower limit sensor and the upper limit sensor, and the driving of the driving motor, the conveying shaft and the clamping shaft can cooperate to position and clamp the PCB placed between the conveying shaft and the clamping shaft, and the multiple groups of conveying shafts can cooperate through chain transmission to achieve synchronous conveying. In the process of the movement of the clamping shaft relative to the conveying shaft, because it is only a slight self-adaptation or manual adjustment, it will not affect the conveying of the PCB. The surface of the conveying shaft can be cleaned when it rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention.

[0021] Figure 2 It is a side view of the present invention.

[0022] Figure 3 It is a schematic diagram of the local structure of the present invention from the side view.

[0023] Figure 4 It is a structural schematic diagram of the cleaning mechanism in the present invention.

[0024] Figure 5 It is a schematic diagram of the structure of the scraping component in the present invention.

[0025] Figure 6 for Figure 5Schematic diagram of the enlarged structure of area A in the middle.

[0026] Figure 7 It is a structural schematic diagram of the grid frame in the present invention.

[0027] Figure 8 It is a schematic diagram of the structure of the limit drive member in the present invention.

[0028] Fig. 9 for Figure 4 Schematic diagram of the enlarged structure of area B in the middle.

[0029] In the figure: 1- bracket, 11- lifting assembly, 1101- lifting rod, 1102- rotating bearing seat, 1103- lifting gear, 12- lifting slot, 2- conveying shaft, 21- driving gear, 22- first rubber-coated roller, 3- pressing shaft, 31- transmission gear, 32- second rubber-coated roller, 4- synchronous shaft, 41- driving motor, 42- synchronous gear, 5- cleaning mechanism, 6- mounting plate, 61- mounting hole, 62- limiting slot, 7- grid frame, 71- arc scraping slot, 72- mounting shaft, 8- limiting driving member, 81- rack, 82- sliding height limiting slot, 83- rotating slot, 84- limiting button, 9- scraping assembly, 91- rotating shaft, 92- scraper, 93- rotating gear. DETAILED DESCRIPTION

[0030] See also Figure 1-Figure 3 In an embodiment of the present invention, an automatic lifting device for a volcanic ash grinding machine comprises two symmetrically arranged brackets 1, a plurality of groups of parallel conveying shafts 2 are rotatably connected between the two brackets 1, lifting grooves 12 are arranged on the sides of both ends of the conveying shaft 2, the lifting grooves 12 are through-arranged on the brackets 1, a lifting assembly 11 is matched in the lifting grooves 12, a clamping shaft 3 is rotatably connected between the relative lifting assemblies 11, the clamping shaft 3 and the conveying shaft 2 are arranged in a one-to-one correspondence, a driving motor 41 is installed on the bracket 1, a synchronous shaft 4 is rotatably connected at the output end of the driving motor 41, and a synchronous gear 42 is arranged on the outer periphery of the synchronous shaft 4 in transmission connection with the lifting assembly 11, when the driving motor 41 drives the synchronous shaft 4 to rotate and cooperates with the lifting assembly 11 through the synchronous gear 42, the lifting assembly 11 drives the clamping shaft 3 to move relative to the conveying shaft 2. In this way, automatic lifting can be achieved. Preferably, in order to improve the automation effect, a lower limit sensor and an upper limit sensor can be set on the upper and lower sides of the bracket 1. The lower limit sensor and the upper limit sensor are electrically connected to the drive motor 41. Through the induction of the lower limit sensor and the upper limit sensor, and in conjunction with the drive motor 41, the conveying shaft 2 and the clamping shaft 3 can be coordinated to position and clamp the PCB placed between the conveying shaft 2 and the clamping shaft 3, and multiple groups of conveying shafts 2 can be coordinated through chain transmission to achieve synchronous conveying.

[0031] The lifting assembly 11 includes a lifting rod 1101 movably arranged in the lifting slot 12, a lifting gear 1103 is sleeved on one end of the lifting rod 1101 and is connected to the synchronous gear 42, a rotating bearing seat 1102 is installed on the other end of the lifting rod 1101, and the end of the clamping shaft 3 is rotatably connected to two opposite rotating bearing seats 1102. When the synchronous shaft 4 drives the synchronous gear 42 to rotate, the lifting gear 1103 can be driven to rotate, thereby driving the rotating bearing seat 1102 to be lifted and lowered by the lifting rod 1101. The lifting rod 1101 includes a screw rotatably connected in the lifting slot 12, the lifting gear 1103 is fixedly sleeved at one end of the screw, a rod sleeve is threadedly connected to the outer periphery of the screw, and a rotating bearing seat 1102 is slidably connected at the end of the rod sleeve, and the rotating bearing seat 1102 is slidably arranged in the lifting slot 12, and a spring is connected between the rotating bearing seat 1102 and one end of the lifting slot 12. The sliding fit between the rod sleeve and the rotating bearing seat 1102 can not only ensure that the rotating bearing seat 1102 and the rod sleeve can have a small relative sliding space in the extension direction of the lifting groove 12, but also limit the rotation of the rod sleeve. In this way, the lifting gear 1103 and the screw rod rotate synchronously, which can drive the rod sleeve to move in the lifting groove 12 and drive the rotating bearing seat 1102 to slide synchronously, so that the distance between the clamping shaft 3 and the conveying shaft 2 can be adjusted. At the same time, the spring can also be used to maintain a tendency for the clamping shaft 3 to be elastically clamped relative to the conveying shaft 2.

[0032] Furthermore, the outer peripheries of the ends of the conveying shaft 2 and the clamping shaft 3 are respectively fixedly sleeved with a driving gear 21 and a transmission gear 31, and the driving gear 21 and the transmission gear 31 are meshed and transmitted. In the process of the movement of the clamping shaft 3 relative to the conveying shaft 2, because it is only a slight self-adaptation or manual adjustment, it will not affect the conveying of the PCB. The driving motors 41 on the brackets 1 at both ends are servo motors, which facilitate human-machine dialogue and digital height adjustment; the two ends synchronously lift the clamping shaft 3 to facilitate smooth board passing. The synchronous gear 42 drives the lifting assembly 11 to rotate synchronously, and synchronous lifting can be achieved. This application is mainly aimed at PCB boards with a thickness of 0.1-10 mm. Under such a thickness, the adjustment of the clamping shaft 3 relative to the conveying shaft 2 will not affect the meshing transmission between the driving gear 21 and the transmission gear 31. The outer peripheries of the conveying shaft 2 and the clamping shaft 3 are respectively sleeved with a first rubber-coated roller 22 and a second rubber-coated roller 32. The cooperation of the conveying shaft 2 and the clamping shaft 3 can facilitate the stable transportation of the PCB board.

[0033] Among them, Figure 1-Figure 4As shown, a cleaning mechanism 5 for cleaning the surface of the conveying shaft 2 is also provided between adjacent conveying shafts 2. Preferably, if necessary, a cleaning mechanism 5 can also be provided between adjacent pressing shafts 3. The cleaning mechanism 5 between the conveying shafts 2 is mounted on the bracket 1, and the cleaning mechanism 5 between the pressing shafts 3 is mounted on the lifting assembly 11, so that the cleaning mechanism 5 between the pressing shafts 3 can be synchronously lifted and lowered when the pressing shafts 3 are lifted and lowered. The cleaning mechanism 5 includes two symmetrically arranged mounting plates 6, a grid frame 7 is fixedly connected between the two mounting plates 6, and a scraping assembly 9 that is rotatably connected and slidably fitted with the edge of the grid frame 7 is also rotatably provided between the two mounting plates 6. The scraping assembly 9 is movablely fitted with the first rubber-coated roller 22 or the second rubber-coated roller 32 on the surface of the conveying shaft 2 or the pressing shaft 3 on the side away from the grid frame 7. With such a configuration, the surface of the conveying shaft 2 or the pressing shaft 3 can be cleaned when the conveying shaft 2 or the pressing shaft 3 rotates.

[0034] Furthermore, mounting holes 61 are provided at the four corners of the mounting plate 6, and the mounting holes 61 are used to cooperate with bolts to fix the mounting plate 6 on the bracket 1. A limit drive 8 for driving the scraping component 9 to rotate is slidably provided on the mounting plate 6. The limit drive 8 can be set on the surface of the mounting plate 6 on one side, or on both sides, preferably on one of them. The limit drive 8 can be manually controlled or driven by an electric telescopic push rod.

[0035] like Figure 5-Figure 6 As shown, the scraper assembly 9 includes a rotating shaft 91 rotatably connected between the two mounting plates 6, a rotating gear 93 is fixedly sleeved on the end of the rotating shaft 91, and a scraper 92 is fixedly connected to the periphery of the rotating shaft 91. The scraper 92 is fitted on the surface of the first rubber-coated roller 22 or the second rubber-coated roller 32. The cross-section of the scraper 92 is fan-shaped. Impurities on the surface of the first rubber-coated roller 22 or the second rubber-coated roller 32 can be scraped off by the scraper 92, thereby playing a cleaning role.

[0036] When the first rubber-coated roller 22 or the second rubber-coated roller 32 rotates relative to the scraper 92, in the clockwise or counterclockwise rotation, impurities in one direction will be scraped down by the scraper 92, and impurities in the other direction will be pushed to the top of the scraper 92. In order to continuously maintain the cleaning efficiency of the scraper 92, as shown in FIG. Figure 7As shown, arc-shaped scraping grooves 71 are symmetrically embedded on both sides of the grid frame 7. The arc-shaped scraping grooves 71 are slidably fitted on the surface of the scraper 92. The outer surface radius of the scraper 92 is the same as the radius of the arc-shaped scraping grooves 71. When the rotating shaft 91 drives the scraper 92 to rotate relative to the arc-shaped scraping grooves 71, the arc-shaped scraping grooves 71 can scrape off the dirt on the surface of the scraper 92, thereby achieving the effect of keeping the surface of the scraper 92 clean, and then the first rubber-coated roller 22 or the second rubber-coated roller 32 can be continuously cleaned. The two ends of the grid frame 7 are symmetrically penetrated with mounting shafts 72, and the ends of the mounting shafts 72 are penetrated through the mounting plate 6. The grid frame 7 is supported and arranged between adjacent rotating shafts 91 by the mounting shafts 72, and the scraper 92 is cleaned by the cooperation of the arc-shaped scraping grooves 71 and the scraper 92.

[0037] like Figure 8 As shown, the limit drive 8 is symmetrically provided with racks 81 on both sides, and the racks 81 and the rotating gear 93 are meshed for transmission. When the limit drive 8 drives the racks 81 to move downward relative to the mounting plate 6 (the downward movement here refers to the side where the arc-shaped scraping grooves 71 on both sides of the grid frame 7 are in contact with the scraper 92), the rotating shaft 91 drives the scraper 92 to rotate toward the side of the arc-shaped scraping groove 71, and the arc-shaped scraping groove 71 scrapes off the dirt on the surface of the scraper 92, making it easier for dirt and impurities to fall off and achieve a cleaning effect. When the limit drive 8 drives the racks 81 to move upward relative to the mounting plate 6, the rotating shaft 91 drives the scraper 92 to resume contact with the surface of the first rubber-coated roller 22 or the second rubber-coated roller 32.

[0038] In order to ensure that the rotation angle of the scraper 92 driven by the rotating shaft 91 can be accurately controlled every time, the two sides of the limit driving member 8 are symmetrically provided with sliding height limiting grooves 82, which are slidably sleeved on the periphery of the end of the installation shaft 72, and the extension direction of the sliding height limiting groove 82 is the moving direction of the limit driving member 8. When the scraper 92 is attached to the surface of the first rubber-coated roller 22 or the second rubber-coated roller 32, the end of the installation shaft 72 is located at the lower end of the sliding height limiting groove 82, and when the scraper 92 is completely rotated into the arc-shaped scraping groove 71, the end of the installation shaft 72 is located at the upper end of the sliding height limiting groove 82. Such a setting can limit the movement range of the limit driving member 8, and prevent the rotation angle of the rotating shaft 91 from being too large to affect the rotation of the conveying shaft 2 and the pressing shaft 3.

[0039] Furthermore, if Fig. 9As shown, if the movement of the limit drive 8 is manually controlled, a rotation groove 83 is embedded in the upper end of the limit drive 8, and a limit button 84 is eccentrically connected to the rotation groove 83. The upper end of the mounting plate 6 is embedded with a limit groove 62 aligned with the rotation groove 83. When the scraper 92 is not cleaned, a part of the limit button 84 rotates into the limit groove 62, thereby maintaining the height position of the limit drive 8. When the limit drive 8 needs to be pushed downward, the limit button 84 is turned out from the limit groove 62 to push the limit drive 8 downward.

Claims

1. An automatic lifting device for a volcanic ash grinding machine, comprising two symmetrically arranged brackets, a plurality of sets of parallel conveying shafts are rotatably connected between the two brackets, lifting grooves are arranged on the sides of both ends of the conveying shafts, the lifting grooves are through-arranged on the brackets, a lifting assembly is matched in the lifting grooves, and a pressing shaft is rotatably connected between the relative lifting assemblies, characterized in that: The lifting assembly includes a lifting rod movably arranged in a lifting groove, one end of the lifting rod is provided with a lifting gear connected to a synchronous gear transmission on the outer periphery, the other end of the lifting rod is installed with a rotating bearing seat, the end of the clamping shaft is rotatably connected to two opposite rotating bearing seats, and a cleaning mechanism for cleaning the surface of the conveying shaft is also provided between adjacent conveying shafts.

2. The automatic lifting device for a volcanic ash grinding machine according to claim 1, characterized in that: A driving motor is installed on the bracket, and a synchronous shaft is rotatably connected to the output end of the driving motor. A synchronous gear is provided on the outer sleeve of the synchronous shaft that is transmission-connected to the lifting assembly. When the driving motor drives the synchronous shaft to rotate and the synchronous gear and the lifting assembly are matched, the lifting assembly drives the clamping shaft to move relative to the conveying shaft.

3. The automatic lifting device for a volcanic ash grinding machine according to claim 1, characterized in that: The pressing shaft and the conveying shaft are arranged in a one-to-one correspondence.

4. The automatic lifting device for a volcanic ash grinding machine according to claim 1, characterized in that: A lifting lower limit sensor and a lifting upper limit sensor are arranged on the upper and lower sides of the bracket, and the lifting lower limit sensor and the lifting upper limit sensor are both electrically connected to the driving motor.

5. The automatic lifting device for a volcanic ash grinding machine according to claim 1, characterized in that: The lifting rod includes a screw rod rotatably connected in the lifting groove, the lifting gear fixing sleeve is arranged at one end of the screw rod, the outer periphery of the screw rod is threadedly connected with a rod sleeve, the end of the rod sleeve is slidably connected with a rotating bearing seat, the rotating bearing seat is slidably arranged in the lifting groove, and a spring is connected between the rotating bearing seat and one end of the lifting groove.

6. The automatic lifting device for a volcanic ash grinding machine according to claim 1 or 5, characterized in that: The outer peripheries of the ends of the conveying shaft and the pressing shaft are respectively fixedly sleeved with a driving gear and a transmission gear, the driving gear and the transmission gear are meshed for transmission, and the outer peripheries of the conveying shaft and the pressing shaft are respectively sleeved with a first rubber-coated roller and a second rubber-coated roller.

7. The automatic lifting device for a volcanic ash grinding machine according to claim 6, characterized in that: The cleaning mechanism includes two symmetrically arranged mounting plates, a grid frame is fixedly connected between the two mounting plates, and a scraping component is rotatably connected between the two mounting plates and is slidably fitted with the edge of the grid frame. The scraping component is movably fitted with the first rubber-coated roller on the surface of the conveying shaft on the side away from the grid frame.

8. The automatic lifting device for a volcanic ash grinding machine according to claim 7, characterized in that: The four corners of the mounting plate are provided with mounting holes, and a limit driving member for driving the scraping assembly to rotate is slidably arranged on the mounting plate.

9. The automatic lifting device for a volcanic ash grinding machine according to claim 8, characterized in that: The scraping assembly includes a rotating shaft rotatably connected between two mounting plates, a rotating gear is fixedly sleeved at the end of the rotating shaft, a scraper is fixedly connected to the periphery of the rotating shaft, the scraper is fitted on the surface of the first rubber-coated roller, and the cross-section of the scraper is fan-shaped.

10. The automatic lifting device for a volcanic ash grinding machine according to claim 9, characterized in that: The two sides of the grid frame are symmetrically embedded with arc scraping grooves, and the arc scraping grooves are slidably fitted on the surface of the scraper. The outer surface radius of the scraper is the same as the radius of the arc scraping grooves. The two ends of the grid frame are symmetrically penetrated with mounting shafts, and the ends of the mounting shafts are penetrated through the mounting plate.

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