阅读说明：本技术 一种皮带式两下两上组合四轴研磨机 (Belt type four-shaft grinding machine combining two lower parts and two upper parts ) 是由 谌火利 余桂恒 谢昌剑 唐志军 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种皮带式两下两上组合四轴研磨机,通过磨刷的左右两侧设置压紧包胶轴,并在皮带组件的出料侧设置白毛刷辊,能够使得上皮带组件、过渡输送行辘组、下皮带组件和出料输送行辘组形成研磨的输送途径,保护PCB软板在传输和磨刷过程中不会折板、卡板、掉板等情况发生,能够很好地减低研磨机的故障率,提高研磨机的稳定性。(The invention discloses a belt type two-lower-two-upper combined four-axis grinding machine, wherein a pressing rubber wrapping shaft is arranged on the left side and the right side of a grinding brush, and a white brush roller is arranged on the discharge side of a belt component, so that an upper belt component, a transitional conveying line roller group, a lower belt component and a discharge conveying line roller group form a grinding conveying path, a PCB soft board is protected from folding, clamping, falling and the like in the conveying and grinding processes, the fault rate of the grinding machine can be well reduced, and the stability of the grinding machine is improved.)

1. A belt type four-axis grinding machine with two lower parts and two upper parts combined comprises a feeding conveying line roller group, an upper belt component, a transition conveying line roller group, a lower belt component and a discharging conveying line roller group which are sequentially arranged in a machine body of the grinding machine along the conveying direction of a soft plate, wherein two lower grinding brushes are arranged at the lower side of the upper belt component, two upper grinding brushes are arranged at the upper side of the lower belt component,

the left side and the right side of each lower grinding brush are provided with first pressing rubber coating shafts, and the upper belt component is internally provided with glass fiber plates which are arranged opposite to the lower grinding brush and the first pressing rubber coating shafts on the left side and the right side of the lower grinding brush;

the left side and the right side of each upper grinding brush are provided with second pressing rubber coating shafts, and the lower belt component is internally provided with glass fiber plates which are arranged opposite to the upper grinding brush and the second pressing rubber coating shafts on the left side and the right side of the upper grinding brush;

the discharge sides of the upper belt assembly and the lower belt assembly are respectively provided with a first white hair brush roller and a second white hair brush roller, the first white hair brush roller is arranged along the running direction of the upper belt assembly and is in contact with the upper belt assembly, and the second white hair brush roller is arranged along the running direction of the lower belt assembly and is in contact with the lower belt assembly.

2. The belt-type two-down two-up combined four-axis grinder of claim 1, wherein the first compression rubber-covered shaft is provided with a shaft sleeve seat at each end, a shaft sliding seat corresponding to the shaft sliding seat is provided on the inner wall plate of the grinder body, the shaft sleeve seat is slidably engaged with the shaft sliding seat, and a first elastic member is provided on the shaft sliding seat and applies an elastic force to the shaft sleeve seat to drive the first compression rubber-covered shaft to drive the upper belt component to move.

3. The belt-type two-lower two-upper combined four-axis grinder of claim 2, wherein the spindle slider is provided with an adjusting member for adjusting an elastic force applied to the spindle housing by the first elastic member.

4. The belt type two-lower two-upper combined four-shaft grinding machine as claimed in claim 1, wherein the upper belt assembly is provided at a lower side thereof with a plurality of lower skip row groups arranged in a conveying direction of the soft board, and the lower grinding brush and the first pressing rubber coating shaft at left and right sides thereof are arranged between the adjacent lower skip row groups;

a plurality of upper material passing line roller groups arranged along the conveying direction of the soft board are arranged on the upper side of the lower belt component, and the upper grinding brush and second pressing rubber coating shafts on the left side and the right side of the upper grinding brush are arranged between the adjacent upper material passing line roller groups;

the diameter of the first compressing rubber-covered shaft is smaller than the diameter of the lower material passing line roller of the roller group, and the diameter of the second compressing rubber-covered shaft is smaller than the diameter of the upper material passing line roller of the roller group.

5. The belt type two-lower two-upper combined four-shaft grinding machine according to claim 4, wherein the lower passing wire reel set comprises a plurality of conveying wire reels arranged along the conveying direction of the soft board and fixing seats arranged at both ends of the conveying wire reels; each the both ends of the rumble of carrying are equipped with the movable block respectively, the movable block with fixing base sliding fit, just be equipped with on the fixing base to the movable block exerts elastic force in order to order about the second elastic component of the ascending belt subassembly action of the rumble of carrying.

6. The belt-type two-lower two-upper combined four-axis grinding machine of claim 1, wherein the first bristle brush roller and the upper belt assembly are geared together and the second bristle brush roller and the lower belt assembly are geared together.

7. The belt type two-lower two-upper combined four-axis grinder of claim 1, wherein a frame is provided in the grinder body, a lifting assembly is provided on the frame, a swing assembly is provided on the lifting assembly, and the lower and upper brushes are provided on the lifting assembly.

8. The belt type two-lower two-upper combined four-shaft grinder as claimed in any one of claims 1 to 7, wherein the discharge side of the upper belt assembly is rotatably provided on the body of the grinder.

9. The belt type two-lower two-upper combined four-shaft grinding machine as claimed in claim 8, wherein an extension shaft is respectively led out from both ends of the discharge side of the upper belt component, a belt seat bearing corresponding to the extension shaft is arranged on an inner wall plate of the grinding machine body, a half shaft is arranged in the belt seat bearing, and the extension shaft is coaxially connected with the corresponding half shaft through a coupling.

10. The belt-type two-lower two-upper combined four-shaft grinder as claimed in claim 9, wherein the upper belt assembly comprises a belt bracket, driven shafts and a main driving shaft provided at left and right sides of the belt bracket, and a belt body wound around the driven shafts and the main driving shaft, and the two protruding shafts are coaxially inserted into both ends of the main driving shaft, respectively.

Technical Field

The invention relates to the technical field of PCB (printed circuit board) grinding machines, in particular to a belt type four-shaft grinding machine with two lower parts and two upper parts combined.

Background

The PCB soft board is a kind of printed circuit board, is called as soft circuit board, also called as FPC soft board, usually uses PI as substrate, can be arbitrarily bended and bended, the PCB soft board is used in connection of needing repeated bending and some small parts.

The PCB soft board needs to be brushed in the processing process so as to reduce the roughness of the surface of the soft board. At present, a belt type board grinder is used for grinding double surfaces of a flexible PCB, for example, a double-surface flexible board grinder is called as an authorization notice issued by the intellectual property office in 12 months and 05 days of 2012, and a conveying belt and a grinding brush are matched to grind the flexible PCB. Although the patent publication can realize double-side polishing of the PCB soft board, the following problems also exist:

1. the belt is flexibly supported, and the belt is not propped against the PCB soft board well in the polishing process, so that the polishing effect of the polishing brush on the PCB soft board is not ideal;

2. a spray head in the machine sprays clean water to the belt to enable a layer of water film to be formed between the PCB soft board and the belt, the PCB soft board is attached to the belt under the adsorption force of the water, and the PCB soft board is easy to fold a plate, roll the plate, wrinkle the plate and the like in the conveying and grinding processes.

The main reason for the above problems is that the tightness of the prior belt type board grinder during the transportation of the PCB soft board and the fixing ability during the brushing are not good enough, and the whole transportation system of the belt type board grinder needs to be optimized and improved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention mainly aims to provide a belt type two-lower-two-upper combined four-shaft grinding machine, aiming at solving the problems of poor tightness of a belt type plate grinding machine in conveying a PCB soft board and poor fixing capability in grinding and brushing.

In order to achieve the purpose, the belt type two-lower-two-upper combined four-axis grinding machine comprises a feeding conveying line roller group, an upper belt assembly, a transition conveying line roller group, a lower belt assembly and a discharging conveying line roller group which are sequentially arranged in a machine body of the grinding machine along the conveying direction of a soft plate, wherein two lower grinding brushes are arranged on the lower side of the upper belt assembly, and two upper grinding brushes are arranged on the upper side of the lower belt assembly;

the left side and the right side of each lower grinding brush are provided with first pressing rubber coating shafts, and the upper belt component is internally provided with glass fiber plates which are arranged opposite to the lower grinding brush and the first pressing rubber coating shafts on the left side and the right side of the lower grinding brush;

the left side and the right side of each upper grinding brush are provided with second pressing rubber coating shafts, and the lower belt component is internally provided with glass fiber plates which are arranged opposite to the upper grinding brush and the second pressing rubber coating shafts on the left side and the right side of the upper grinding brush;

the discharge sides of the upper belt assembly and the lower belt assembly are respectively provided with a first white hair brush roller and a second white hair brush roller, the first white hair brush roller is arranged along the running direction of the upper belt assembly and is in contact with the upper belt assembly, and the second white hair brush roller is arranged along the running direction of the lower belt assembly and is in contact with the lower belt assembly.

Optionally, two ends of the first compression rubber coating shaft are respectively provided with a shaft sleeve seat, a shaft sliding seat corresponding to the shaft sliding seat is arranged on an inner wall plate of the grinder body, the shaft sleeve seat is in sliding fit with the shaft sliding seat, and a first elastic piece which applies elastic force to the shaft sleeve seat to drive the first compression rubber coating shaft to move towards the upper belt assembly is arranged on the shaft sliding seat.

Optionally, the shaft sliding seat is provided with an adjusting member for adjusting the elastic force exerted by the first elastic member on the shaft sleeve seat.

Optionally, the lower side of the upper belt assembly is provided with a plurality of lower material passing line roller groups arranged along the conveying direction of the soft board, and the lower grinding brush and the first pressing rubber coating shafts on the left and right sides of the lower grinding brush are arranged between the adjacent lower material passing line roller groups;

a plurality of upper material passing line roller groups arranged along the conveying direction of the soft board are arranged on the upper side of the lower belt component, and the upper grinding brush and second pressing rubber coating shafts on the left side and the right side of the upper grinding brush are arranged between the adjacent upper material passing line roller groups;

the diameter of the first compressing rubber-covered shaft is smaller than the diameter of the lower material passing line roller of the roller group, and the diameter of the second compressing rubber-covered shaft is smaller than the diameter of the upper material passing line roller of the roller group.

Optionally, the lower material passing line roller group comprises a plurality of conveying line rollers arranged along the conveying direction of the soft board and fixing seats arranged at two ends of the conveying line rollers; each the both ends of the rumble of carrying are equipped with the movable block respectively, the movable block with fixing base sliding fit, just be equipped with on the fixing base to the movable block exerts elastic force in order to order about the second elastic component of the ascending belt subassembly action of the rumble of carrying.

Optionally, the first bristle brush roll and the upper belt assembly are geared together, and the second bristle brush roll and the lower belt assembly are geared together.

Optionally, a machine frame is arranged in the grinder body, a lifting assembly is arranged on the machine frame, a swinging assembly is arranged on the lifting assembly, and the lower grinding brush and the upper grinding brush are both arranged on the lifting assembly.

Optionally, the discharge side of the upper belt assembly is rotatably disposed on the body of the grinding mill.

Optionally, an extension shaft is respectively led out from two ends of the discharge side of the upper belt assembly, a bearing with a seat corresponding to the extension shaft is arranged on an inner wall plate of the grinder body, a half shaft is arranged in the bearing with the seat, and the extension shaft is coaxially connected with the corresponding half shaft through a coupling.

Optionally, the upper belt assembly comprises a belt bracket, a driven shaft and a main transmission shaft which are arranged on the left side and the right side of the belt bracket, and a belt body which is wrapped around the driven shaft and the main transmission shaft, and the two extending shafts are respectively coaxially inserted at two ends of the main transmission shaft. .

According to the invention, the first pressing rubber coating shafts are arranged on the left side and the right side of the lower grinding brush, the second pressing rubber coating shafts are arranged on the left side and the right side of the upper grinding brush, the glass fiber plates are arranged in the upper belt component and opposite to the lower grinding brush and the first pressing rubber coating shafts on the left side and the right side of the lower grinding brush, and the glass fiber plates are arranged in the lower belt component and opposite to the upper grinding brush and the second pressing rubber coating shafts on the left side and the right side of the upper grinding brush, so that when the grinding brush is used for grinding the upper surface and the lower surface of the PCB soft board, the glass fiber plates in the belt component can support the grinding brush to apply pressure to the PCB soft board, and convenience is provided for grinding; the ground parts of the PCB soft board can be pressed through the pressing rubber coating shafts on the left side and the right side of the grinding brush, so that the deviation condition of the PCB soft board in the grinding and brushing treatment process is inhibited, and the PCB soft board is protected from being scraped and folded and crumpled by the grinding brush;

the white hair brush roller is arranged below the discharging side of the belt assembly and is arranged in the running direction along the belt assembly and is in contact with the belt assembly, so that the PCB soft board to be rolled into the rotation by the belt assembly can be scraped from the belt assembly through the white hair brush roller, and the problems of folding, rolling and wrinkling of the PCB soft board in the conveying and grinding processes are solved.

Compared with the prior art, the grinding machine provided by the invention has the advantages that the pressing rubber wrapping shafts are arranged on the left side and the right side of the grinding brush, and the white brush roller is arranged on the discharge side of the belt component, so that the upper belt component, the transitional conveying line roller group, the lower belt component and the discharge conveying line roller group form a grinding conveying path, the PCB soft board is protected from folding, clamping, falling and the like in the conveying and grinding processes, the fault rate of the grinding machine can be well reduced, and the stability of the grinding machine is improved.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a side cross-sectional view of one embodiment of the present invention;

FIG. 3 is an internal schematic view of a lower brush section in accordance with an embodiment of the present invention;

FIG. 4 is a schematic view of the engagement of the upper belt assembly and the first bristle roll in one embodiment of the present invention;

FIG. 5 is an internal cross-sectional view of a lower brush section in an embodiment of the invention;

FIG. 6 is an internal schematic view of an upper scrubbing section in accordance with an embodiment of the present invention;

FIG. 7 is an internal cross-sectional view of an upper brush section in an embodiment of the present invention;

FIG. 8 is a schematic structural view of a first pressing packing shaft according to an embodiment of the present invention;

FIG. 9 is a schematic view of the first skip conveyor line tackle according to one embodiment of the present invention;

FIG. 10 is a cross-sectional view of a first skip conveyor row reel set in accordance with an embodiment of the present invention;

FIG. 11 is a schematic view of the lifting assembly and the swing assembly of the lower brush assembly in accordance with one embodiment of the present invention;

FIG. 12 is a schematic view of the structure of an upper strap assembly in an embodiment of the present invention;

figure 13 is a cross-sectional view of an upper strap assembly in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-13 of the specification, in the embodiment of the present invention, a belt type two-lower two-upper combined four-axis grinder is provided, a body of the grinder is sequentially divided into a feeding section 100, a lower brush section 200, a transition section 300, an upper brush section 400 and a discharging section along a conveying direction of a flexible PCB 600.

Wherein, a feeding conveying line roller group 110 is arranged in the feeding section 100 and is used for feeding the PCB soft board 600 into the lower brush section 200 for lower surface brushing.

Set up upper belt subassembly 210 in lower brush section 200, this upper belt subassembly 210's downside is provided with three down the capable rumble group of mistake material (241, 242, 243) along soft board direction of delivery, the material is crossed under adjacent down between the capable rumble group of mistake material 241 and 242, the material is crossed down between the capable rumble group of mistake material 242 and the material is crossed down and is walked the rumble group 24 and set up down polish-brush 220 respectively, polish-brush 220's the left and right sides down all is equipped with first compaction package axle 230, be equipped with the glass fiber board 211 that sets up relatively with polish-brush 220 and the first compaction package axle 230 of its left and right sides down in upper belt subassembly 210. After the PCB soft board 600 enters the lower brush section 200, the lower material passing line roller group 241 holds the PCB soft board 600, and the upper belt component 210 brings the PCB soft board 600 to the position of the lower brush 220 for lower surface brushing treatment. In the process of brushing, the glass fiber plate 211 in the upper belt component 210 pushes against the lower brushing 220 to apply pressure to the PCB soft board 600, so that convenience is brought to grinding; meanwhile, the two ends of the ground part of the flexible printed circuit board (600) are pressed by the first pressing glue wrapping shafts (230) on the left side and the right side of the lower brush (220), so that the deviation of the flexible printed circuit board (600) in the brushing process is inhibited, and the flexible printed circuit board (600) is protected from being scraped and wrinkled by the brush.

A first bristle brush roller 251 is provided below the discharge side of the upper belt assembly 210, and the first bristle brush roller 251 is provided in the running direction of the upper belt assembly 210 and contacts the upper belt assembly 210. When the upper belt assembly 210 sends the PCB soft board 600 out, if the PCB soft board 600 tends to be driven by the upper belt assembly 210 to rotate, the needle-shaped bristles of the first white brush roller 251, which are in contact with the upper belt assembly 210, can scrape the PCB soft board 600 from the upper belt assembly 210 from the reverse direction of the operation of the upper belt assembly 210, so as to avoid the PCB soft board 600 from being rolled into the upper belt body of the upper belt assembly 210, which causes problems of folding, rolling, wrinkling and the like of the PCB soft board 600.

The transition conveying line reel group 310 is arranged in the transition section 300 and used for realizing the smooth transition of the PCB soft board 600 from the lower brush section 200 to the upper brush section 400.

Set up down belt subassembly 410 in upper brush section 400, this upper belt subassembly 210 upside is provided with three material loading line rumble group (441, 442, 443) along soft board direction of delivery, material loading line rumble group 441 and material loading line rumble group 442 on the adjacent, material loading line rumble group 442 and material loading line rumble group between be equipped with polish-brush 420 respectively, the left and right sides of going up polish-brush 420 is equipped with the second and compresses tightly gluey axle 430, be equipped with in lower belt subassembly 410 and compress tightly the fine board 411 of glass that gluey axle 430 set up relatively with last polish-brush 420 and the second of its left and right sides. After the flexible printed circuit board (600) enters the upper brush section (400), the upper material passing roller group (441) presses the flexible printed circuit board (600) to make the flexible printed circuit board (600) fit on the lower belt assembly (410), the lower belt assembly (410) holds and conveys the flexible printed circuit board (600), and the upper brush (420) performs upper surface brushing on the flexible printed circuit board (600) when the flexible printed circuit board enters the upper brush (420). Similarly, in the rubbing process, the glass fiber plate 411 in the lower belt assembly 410 abuts against the pressure applied to the PCB soft board 600 by the upper rubbing brush 420, and the second pressing glue shafts 430 on the left and right sides of the upper rubbing brush 420 press the two ends of the ground part of the PCB soft board 600, so that a better grinding effect is achieved and the PCB soft board 600 is protected from being scraped and wrinkled by the upper rubbing brush 420.

And, a second white brush roller 451 is provided below the discharging side of the upper belt assembly 210 to prevent the PCB flexible board 600 from being caught in the lower belt body of the lower belt assembly 410.

Be equipped with the capable rumble group of ejection of compact conveying 510 in the ejection of compact section for brush section 400 on steadily sending out PCB soft board 600, accomplish the two-sided scrubbing to PCB soft board 600.

Compared with the prior art, the grinding machine provided by the invention has the advantages that the pressing rubber wrapping shafts are arranged on the left side and the right side of the grinding brush, and the white hair brush roller is arranged on the discharge side of the belt component, so that the upper belt component 210, the transitional conveying line roller group, the lower belt component 410 and the discharge conveying line roller group form a tight conveying path, the PCB soft board 600 is protected from folding, clamping, falling and the like in the conveying and grinding processes, the fault rate of the grinding machine can be well reduced, and the stability of the grinding machine is improved.

In this embodiment, an adaptor belt assembly 260 is provided on the discharge side of the upper brush section 400, between the upper belt assembly 210 and the transitional conveyor line fall group 310. When the upper belt assembly 210 is scraped by the first bristle brush roller 251 with the PCB flexible board 600, the end of the PCB flexible board 600 is generally directed obliquely downward, and if it is directly abutted with the transitional conveying wire tackle 310, it may be inserted into a gap between adjacent conveying wires to cause jamming. Therefore, the engagement belt assembly 260 is disposed between the upper belt assembly 210 and the transitional conveyance row reel group 310, so that the PCB flexible board 600 can be better conveyed to the transitional conveyance row reel group 310.

Accordingly, the third white brush roller 252 is provided at the discharging side of the engagement belt assembly 260 to avoid a problem that the engagement belt assembly 260 rolls in the PCB flexible board 600.

In this embodiment, the first bristle brush roller 251 and the upper belt assembly 210, the second bristle brush roller 451 and the lower belt assembly 410, and the third bristle brush roller 252 and the engagement belt assembly 260 are geared together. Specifically, a first driving gear 218 is disposed at one end of a main driving shaft 2121 of the upper belt assembly 210, a first driven gear 2511 is disposed on the first white brush roller 251, a first transition gear 204 is disposed at an upper portion of an intersection region of the first driven gear 2511 and the first driving gear 218, and the first transition gear 204 is disposed on the inner wall plate 201 of the lower brush section 200. Thereby, a gear mesh transmission fit of the first bristle brush roller 251 and the upper belt assembly 210 is realized, so that the first bristle brush roller 251 is driven to rotate synchronously by the upper belt assembly 210, and an additional power device is not required to be arranged for driving the first bristle brush roller 251.

A second driving gear 261 is disposed on the driven shaft of the belt engaging assembly 260, a second driven gear 2521 is disposed on the third white brush roller 252, a second transition gear 205 is disposed at the upper portion of the intersection of the second driven gear 2521 and the second driving gear 261, and the second transition gear 205 is disposed on the inner wall plate 201 of the lower brush segment 200. Therefore, the third white brush roller 252 is meshed with and in transmission fit with the gear of the engaging belt assembly 260, so that the third white brush roller 252 is driven to rotate synchronously by the engaging belt assembly 260.

The gear meshing transmission structure between the lower belt assembly 410 and the second white hair brush roller 451 is the same as the gear meshing transmission structure between the connecting belt assembly 260 and the third white hair brush roller 252, the principle is the same, and repeated description is given here.

In this embodiment, a frame (270, 470) is provided in the housing of each of the lower brush section 200 and the upper brush section 400, and the lower brush 220 and the upper brush 420 are respectively provided on the frame (270, 470). Taking the lower brush segment 200 as an example, the frame 270 has an upper mounting plate 272 and a lower mounting plate 271 disposed up and down, the lower mounting plate 271 is provided with a lifting assembly 280, the upper mounting plate 272 is provided with a swinging assembly 290, the swinging assembly 290 is movably disposed on the upper mounting plate 272 through a plurality of linear guide rods and connected with the lifting assembly 280, and the lower brush 220 is disposed on the swinging assembly 290. The lifting assembly 280 comprises two worm and gear reduction boxes which are in transmission connection through a connecting rod, a power output shaft of each reduction box is connected with a ball screw, a hand wheel 281 is connected to a power input shaft of the reduction box positioned on the operation side, and the swinging assembly 290 is connected to a screw rod seat of the ball screw. Therefore, when brushing, the lower brush 220 can be driven by the motor 291 of the swing assembly 290 to swing back and forth, so that the brushing treatment of the lower brush 220 on the PCB flexible board 600 is more comprehensive and thorough; the reduction gearbox connected with the hand wheel 281 is driven by rotating the hand wheel 281 to enable the screw rod seat to move up and down, so that the purpose of adjusting the height of the lower grinding brush 220 is achieved.

The upper brush 420 is disposed in the same manner in the housing of the upper brush section 400 so that the upper surface of the PCB flexible board 600 can be brushed with high quality.

Accordingly, side viewing windows (200 b, 400 b) are opened at the operation sides of the lower brush section 200 and the upper brush section 400 so that an operator can adjust the heights of the lower brush 220 and the lower brush 220 according to actual grinding conditions.

Optionally, in this embodiment, two ends of the shaft body 231 of the first pressing rubber-covered shaft 230 are respectively provided with a shaft sleeve seat 232, the inner wall plate 201 of the lower brush segment 200 is provided with a shaft sliding seat 233 corresponding to the shaft sliding seat 233, the shaft sleeve seat 232 is connected with the shaft sliding seat 233 in a sliding fit manner, and the shaft sliding seat 233 is provided with a first elastic member 235 for applying an elastic force to the shaft sleeve seat 232 to drive the first pressing rubber-covered shaft 230 to move toward the upper belt assembly 210. More specifically, the first elastic element 235 is a compression spring, a first groove is formed in the shaft sliding seat 233, the shaft sleeve seat 232 and the compression spring are arranged in the first groove, a pressing block is arranged at a notch of the first groove, and the compression spring applies elastic force to the shaft sleeve seat 232 to drive the first pressing rubber-coated shaft 230 to move towards the belt assembly 210. From this, constitute the elasticity setting of first tight package axle 230 of pressure through axle sleeve seat 232, axle slide 233 and first elastic component 235, be favorable to grinding the PCB soft board 600 that the machine was suitable for different thickness, guarantee simultaneously can not lead to the face to have the indentation with too tight of PCB soft board 600 pressure, also can not lead to PCB soft board 600 to take place the displacement to lead to the face to appear the circumstances such as scratch, grind wrinkle board, board dog-ear and scrap too much.

Preferably, in this embodiment, the diameter of the first pressing glue-wrapping shaft 230 is smaller than the diameter of the upper roller of the upper conveying roller set, so that the first pressing glue-wrapping shaft 230 is as close as possible to the lower grinding brush 220, and thus, more and more stable pressing force is applied to the PCB soft board 600 when the lower grinding brush 220 grinds the PCB, so that the PCB soft board 600 can be more fully and comprehensively ground, and the frequency of the problem of board grinding effect caused by board dislocation or movement due to the loose pressing board is reduced.

Preferably, an adjusting member 235 for adjusting the elastic force of the first elastic member 235 applied to the boss seat 232 is further provided on the shaft sliding seat 233. Specifically, the notch of the first groove is arranged upward relative to the first pressing rubber-coated shaft 230, the adjusting piece 235 is an adjusting bolt, the bolt portion of the adjusting bolt penetrates through the pressing block and is inserted into the threaded hole of the shaft sleeve seat 232, and the adjusting bolt is in threaded connection and matching with the shaft sleeve seat 232. The first elastic member 235 is sleeved on the adjusting bolt, and two ends of the first elastic member are respectively abutted against the head of the adjusting bolt and the pressing block. When the first elastic member 235 is in a compressed state, the first elastic member 235 provides an upward elastic force to the adjusting bolt against the pressing block of the shaft sliding seat 233, the shaft sleeve seat 232 supports the first pressing rubber-coated shaft 230 to move towards the upper belt assembly 210, and the passing PCB soft board 600 is pressed onto the upper belt assembly 210, so that the lower grinding brush 220 can conveniently grind and brush the PCB soft board 600. The worker can adjust the pressure applied by the first elastic member 235 to the PCB 600 by screwing the adjusting bolt to control the degree of compression of the first elastic member 235.

And, through the structure setting, can make adjusting bolt's head up, make things convenient for the staff to carry out real-time adjustment according to the mill board condition from the top.

Correspondingly, in order to realize the observation of the grinding condition of the lower brush section 200 from the top thereof and adjust the adjusting bolt, a top window 200a is arranged at the top of the lower brush section 200, and a transparent door panel 201 which can be opened and closed in a turnover way is arranged at the top window 200 a.

In this embodiment, the lower skip line winch group 241 is taken as an example, and the lower skip line winch group 241 includes a plurality of conveying line winches 2421 arranged along the conveying direction of the soft board and fixing seats 2422 arranged at two ends of the conveying line winches; two ends of each conveying line roller 2421 are respectively provided with a movable block 2423, the movable block 2423 is in sliding fit with the fixed seat 2422, and the fixed seat 2422 is provided with a second elastic part 2424 which applies elastic force to the movable block 2423 to drive the belt assembly 210 on the conveying line roller shaft to move. More specifically, a movable groove 2422a corresponding to each of the conveying line rollers 2421 is provided in the fixing seat 2422, the second elastic member 2424 is a compression spring and is disposed in the movable groove 2422a, and the movable block 2423 is inserted into the movable groove 2422a and is pressed against the second elastic member 2424. A locking bolt 2425 is arranged in the movable groove 2422a, the locking bolt 2425 is inserted into the movable groove 2422a from the bottom of the fixed seat 2422 and is inserted into the movable block 2423, the second elastic element 2424 exerts an elastic force on the movable block 2423 against the groove bottom of the movable groove 2422a, when the locking bolt 2425 is driven by the movable block 2423 to move upwards to a certain extent, the head of the locking bolt 2425 abuts against the bottom of the fixed seat 2422, and the movable block 2423 is pulled so as to prevent the movable block 2423 from being ejected out of the movable groove 2422a by the second elastic element 2424.

Through adopting the lower material passing row rumble group (241, 242, 243) that above-mentioned structure set up, can realize the elastic support to PCB soft board 600 to adapt to the PCB soft board 600 of different thickness better.

Alternatively, in this embodiment, the discharge side of the upper belt assembly 210 is rotatably disposed on the body of the grinder. A belt hold-down plate 203 is provided on the inner wall plate 201 of the lower brush section 200 to prevent the feed side of the upper belt assembly 210 from flipping upward due to the pressure of the first pressure packing shaft 230. The staff can be from brushing the higher authority of section 200 down with going up the upset of band subassembly 210 and open to convenient and fast's observation is ground the in service behavior of brush 220 down, looks over the operating condition of the rumble of carrying and whether cardboard, fall unexpected circumstances such as board.

More specifically, an extension shaft 2121a is respectively led out from two ends of the discharge side of the upper belt assembly 210, a pedestal bearing 216 corresponding to the extension shaft 2121a is arranged on the inner wall plate 201 of the lower brush section 200, a half shaft 2161 is arranged in the pedestal bearing 216, and the extension shaft 2121a is coaxially connected with the corresponding half shaft 2161 through a coupling 217. Therefore, the upper belt component 210 can be arranged in a rotating mode, when the upper belt component 210 needs to be replaced, the coupler 217 can be loosened, the whole upper belt component 210 can be taken out of the lower brush section 200 quickly for replacement, and the work time and the work load of replacing the upper belt component 210 are reduced.

Preferably, the two extension shafts 2121a are coaxially connected to the main drive shaft 2121 of the upper belt assembly 210, and the half shafts 2161 are coaxially connected to the extension shafts 2121a through the coupling 217, so that the first drive gear 218 of the main drive shaft can be disposed on the half shafts 2161, so that the first drive gear 218 is engaged with and rotationally engaged with the first driven gear 2511 of the first white hair brush roller 251, and the first white hair brush roller 251 is driven to rotate synchronously by the upper belt assembly.

In this embodiment, the upper belt assembly 210 includes a belt support 212, a driven shaft 2122 and a main drive shaft 2121 provided at left and right sides of the belt support 212, and a belt body 213 wrapped around the driven shaft 2122 and the main drive shaft 2121, and two extension shafts 2121a are coaxially inserted into two ends of the main drive shaft 2121, respectively.

Two rotatable hooks 214 are provided at the front and rear sides of the belt bracket 212, and a link 203 is provided on the inner wall plate 201 of the lower brush section 200. Therefore, when the worker turns the upper belt assembly 210 over, the hook 214 can be hooked on the connecting rod 203 to hang the upper belt assembly 210, and the subsequent operation of the worker is facilitated.

A reinforcing plate is provided on the upper side of the belt holder 212, and two handles 215 are provided on the reinforcing plate. Thus, the worker can pull up the upper strap assembly 210 by holding the handles 215, which facilitates the inversion of the upper strap assembly 210.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.