Outer surface blue scraping device for bamboo processing

Abstract

The application discloses a kind of outer surface of bamboo processing with scraping green device, it is related to bamboo processing technical field, including frame, the frame is fixedly connected with first connecting frame, a plurality of rotating shafts are rotatably connected on the first connecting frame, first conveying roller is fixedly connected on the rotating shaft, a plurality of lifting frames are slidably connected on the first connecting frame, conveying shaft is rotatably connected on the lifting frame, second conveying roller is fixedly connected on the conveying shaft.The present application is provided with ladder distribution cutter on the tool holder, respectively undertake rough scraping bamboo knot, main scraping green skin, the function of fine scraping clean surface, avoid the fiber tear, surface burr and green skin residue caused by single cutter one-time large cutting depth;And cutting load is dispersed reasonably, greatly reduce instantaneous impact load, effectively prevent tool blade collapse, prolong service life;At the same time, each cutter bottom is designed as arc blade edge, more fit bamboo natural curved surface, reduce local stress concentration, ensure that scraping is uniform.

Description

Technical Field

[0001] This invention relates to the field of bamboo processing technology, and in particular to a device for scraping the outer surface of bamboo for processing. Background Technology

[0002] Bamboo, as a natural and renewable resource, is widely used in construction, furniture, and handicrafts due to its beautiful texture, high strength, and short growth cycle. In bamboo processing, "scraping the green outer layer" is a crucial pretreatment step, designed to remove the dense, siliceous outer layer (bamboo green) from the bamboo's surface to improve its bonding properties, finishing effect, and durability.

[0003] Currently, most bamboo scraping equipment on the market adopts a single-blade fixed structure, which means that only one scraper is set up, attempting to remove all the green skin in one cut. However, this method has significant technical drawbacks: First, bamboo naturally has hard nodes and uneven thickness of the green skin. A single blade must withstand a large instantaneous cutting load during operation, which easily leads to rapid wear or even chipping of the blade, resulting in a short service life and high maintenance costs. Second, to ensure that the green skin at the root is scraped off, the operator usually needs to adjust the scraper to a deeper depth. However, bamboo usually has a natural taper (thick at the root and thin at the tip), which can cause damage to the bamboo fiber in the tip area due to over-scraping, and even cause dents or tears. Conversely, if the cutting depth is reduced to protect the tip, the green skin is likely to remain at the root, affecting the quality of subsequent processing. Furthermore, a single deep cut can easily produce burrs, tears, or wavy marks on the bamboo surface. The surface roughness is difficult to meet the requirements of subsequent processes, and a sanding process is usually required for finishing. This not only reduces the overall processing efficiency, but also generates a large amount of hard dust due to the high silicon content of bamboo, which has an adverse impact on the environment and the health of operators.

[0004] The root of the above problems lies in the fact that the single-blade structure cannot optimize the scraping process in stages. It cannot progressively remove the green skin by first coarsening and then refining, nor can it perform differentiated treatment for bamboo nodes and smooth areas. Therefore, there is an urgent need for an external surface scraping device for bamboo processing that can achieve efficient, uniform, and low-damage scraping results simply through structural improvements in the blade layout, without relying on complex sensing or automatic pressure adjustment systems. Summary of the Invention

[0005] To overcome the shortcomings of the above-mentioned technical defects, the present invention provides a bamboo surface scraping device for bamboo processing.

[0006] A bamboo processing device for scraping the outer surface of bamboo includes a frame, a first connecting frame fixedly connected to the frame, multiple rotating shafts rotatably connected to the first connecting frame, a first conveying roller fixedly connected to the rotating shaft, multiple lifting frames slidably connected to the first connecting frame, a conveying shaft rotatably connected to the lifting frame, a second conveying roller fixedly connected to the conveying shaft, at least one first spring fixedly connected between the lifting frame and the first connecting frame, a second connecting frame fixedly connected to the middle of the first connecting frame, a tool holder provided on the second connecting frame, at least three tools arranged in a stepped manner slidably connected to the tool holder, and threaded columns symmetrically distributed along the tools rotatably connected to the second connecting frame, the threaded columns being threadedly connected to the tools.

[0007] As a preferred embodiment of the present invention, the bottom of the cutting tool is configured to be arc-shaped.

[0008] As a preferred embodiment of the present invention, it further includes a support frame, which is fixedly connected to the middle of the first connecting frame and is located below the tool holder.

[0009] As a preferred embodiment of the present invention, it further includes a fixing frame, which is fixedly connected to the cutting tool on one side, and at least two rotating cutting tools are rotatably connected to the fixing frame.

[0010] As a preferred embodiment of the present invention, it further includes a fixing frame symmetrically distributed along the first connecting frame, the fixing frame being fixedly connected to the frame, a first motor being fixedly connected inside the fixing frame, and the first motor being transmitted to the adjacent rotating shaft via a gear set.

[0011] As a preferred embodiment of the present invention, the tool holder is slidably connected to the second connecting frame, and the second connecting frame is provided with a lifting assembly for driving the tool and the rotary tool to rise and fall.

[0012] As a preferred embodiment of the present invention, the lifting assembly includes a rotating frame, which is rotatably connected to the second connecting frame. A torsion spring is fixed between the rotating frame and the second connecting frame and is symmetrically distributed along the rotating frame. A push-pull frame is slidably connected inside the second connecting frame and is symmetrically distributed along the second connecting frame. The rotating frame is used to push and pull the push-pull frame horizontally. The push-pull frame is slidably connected to the tool holder through an inclined groove.

[0013] As a preferred embodiment of the present invention, it further includes a second motor and a cleaning roller, wherein the second motor is fixedly connected to the rotating frame, the cleaning roller is rotatably connected to the rotating frame, and the cleaning roller is fixedly connected to the output shaft of the second motor.

[0014] As a preferred embodiment of the present invention, it further includes a calibration frame, which is slidably connected to the frame, and a second spring is fixedly connected between the calibration frame and the frame.

[0015] The beneficial effects of this invention are as follows: By setting stepped blades on the blade holder, this invention undertakes the functions of coarse scraping of bamboo joints, main scraping of green skin, and fine scraping of the surface, avoiding fiber tearing, surface burrs, and green skin residue caused by a single blade cutting a large depth at once; and the cutting load is reasonably distributed, greatly reducing the instantaneous impact load, effectively preventing the blade from chipping and extending its service life; at the same time, the bottom of each blade is designed with an arc-shaped cutting edge, which better conforms to the natural curvature of the bamboo, reduces local stress concentration, and ensures uniform scraping.

[0016] This invention innovatively utilizes a lifting assembly (including a rotating frame, torsion spring, push-pull frame, and inclined groove) to construct a purely mechanical triggering mechanism: the cutter initially operates in a high-position avoidance state, and only after the left end of the bamboo has completely passed through the cutter area and pushed the rotating frame does the cutter holder automatically press down to contact the workpiece via a linkage-inclined groove mechanism. This design ensures that scraping only begins after the bamboo is in a stable and fully positioned state, completely avoiding the "cutter collision" phenomenon caused by uneven ends, bending, or jumping during the initial feeding stage, thus improving equipment safety and process reliability. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention.

[0019] Figure 3 This is a three-dimensional structural diagram of the components such as the rotating shaft and lifting frame of the present invention.

[0020] Figure 4 This is a three-dimensional structural cross-sectional view of the tool holder and cutting tools of the present invention.

[0021] Figure 5 This is a three-dimensional structural diagram of the cutting tool and threaded column components of the present invention.

[0022] Figure 6 This is a three-dimensional structural diagram of the fixing frame and rotating blade of the present invention.

[0023] Figure 7 This is a three-dimensional structural diagram of the frame and tool holder components of the present invention.

[0024] Figure 8 This is a three-dimensional structural diagram of the components of the present invention, including the fixing frame, the first motor, and the gear set.

[0025] Figure 9 This is a three-dimensional structural diagram of the rotating frame, the second motor, and the cleaning roller of the present invention.

[0026] Figure 10 This is a three-dimensional structural diagram of the frame and calibration rack of the present invention.

[0027] The markings in the diagram are as follows: 101: Frame, 102: First connecting frame, 103: Rotating shaft, 104: First conveying roller, 105: Lifting frame, 106: Conveying shaft, 107: Second conveying roller, 108: First spring, 109: Second connecting frame, 110: Tool holder, 111: Tool, 112: Threaded column, 113: Support frame, 114: Fixed frame, 115: Rotating knife, 201: Fixed frame, 202: First motor, 203: Gear set, 301: Rotating frame, 302: Second motor, 303: Cleaning roller, 304: Torsion spring, 305: Push-pull frame, 401: Calibration frame, 402: Second spring. Detailed Implementation

[0028] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0029] Example 1: This example provides a bamboo processing device for efficient and high-quality automated scraping of semi-circular or arc-shaped bamboo strips after splitting. Addressing the common characteristics of natural bamboo, such as taper, localized bending, and hard nodes, this device effectively solves problems like chipping, uneven scraping, and residual bamboo skin found in traditional single-blade equipment through an innovative stepped scraper layout, auxiliary rotating blade cleaning, floating conveyor system, and a mechanical feedback-based delayed pressure control mechanism.

[0030] like Figures 1 to 6 As shown, the device includes a frame 101, with a first connecting frame 102 fixedly connected to the top of the frame 101. The first connecting frame 102 is horizontally arranged along the bamboo conveying direction, and multiple parallel rotating shafts 103 are rotatably connected to it. Each rotating shaft 103 is fixedly connected to a first conveying roller 104, forming an upper conveying line. Simultaneously, multiple lifting frames 105 are slidably connected to the first connecting frame 102. The lifting frames 105 cooperate with the first connecting frame 102 via vertical guide rails, allowing them to float freely in the vertical direction. Each lifting frame 105 is rotatably connected to a conveying shaft 106, and a second conveying roller 107 is fixedly connected to the conveying shaft 106, forming a lower conveying line. Two first springs 108 are fixedly connected between the lifting frames 105 and the first connecting frame 102, providing upward elastic support. This allows the second conveying roller 107 to automatically adjust its height according to local bending or slight changes in diameter of the bamboo, ensuring that the bamboo is always clamped and centered by the upper and lower conveying rollers during conveying, preventing skewing, jumping, or jamming.

[0031] Furthermore, a second connecting frame 109 is fixedly connected to the middle of the first connecting frame 102, and a tool holder 110 is mounted on the second connecting frame 109. The key innovation lies in the fact that three stepped cutting tools 111 are slidably connected to the tool holder 110, namely the first scraper, the second scraper, and the third scraper, arranged sequentially along the bamboo's travel direction, with their installation height decreasing step by step, forming a stepped cutting path of "higher on the right and lower on the left". The bottom of each cutting tool 111 is designed with an arc-shaped cutting edge that matches the outer curved surface of common bamboo, so as to better conform to the curved surface of bamboo and reduce local stress concentration and fiber tearing during the scraping process.

[0032] To facilitate adjustment of the initial working position of each cutter 111, threaded posts 112 symmetrically distributed along the front and rear of each cutter 111 are rotatably connected to the second connecting frame 109. The threaded posts 112 are threadedly connected to the cutters 111. The operator can pre-set the vertical reference height of each cutter 111 by rotating and adjusting the threaded posts 112 according to the average diameter and green skin thickness of the bamboo to be processed, thus achieving flexible configuration of process parameters.

[0033] To enhance the ability to handle complex areas, a fixing frame 114 is fixedly attached to the third scraper on the left side, and two rotating blades 115 are rotatably connected to the fixing frame 114. The rotating blade 115 is a small arc-shaped blade that can rotate freely around its own axis. Its cutting edge is slightly lower than the main blade 111. It is used to assist in scraping clean areas that are difficult for the main blade to cover, such as the sides of the bamboo and the recesses of the bamboo nodes, so as to achieve "main and auxiliary synergy and cleaning without dead angles".

[0034] In addition, the device also includes a support frame 113, which is fixed to the middle of the first connecting frame 102 and located directly below the blade holder 110. It is used to support the bamboo from the bottom during the scraping process to prevent the bamboo from sinking and deforming due to the cutting reaction force, and to ensure that the scraping depth is consistent across the entire cross section.

[0035] like Figure 1 , Figure 2 and Figure 8 As shown, in terms of the power system, two fixed frames 201 are fixedly attached to the top rear side of the frame 101, symmetrically distributed along the left and right sides of the first connecting frame 102. A first motor 202 is fixedly attached inside the fixed frames 201. The output shaft of the first motor 202 is connected to the adjacent rotating shaft 103 through a gear set 203, and then drives all the rotating shafts 103 and conveying shafts 106 on the entire conveyor line to rotate synchronously through a synchronous belt or sprocket, so as to realize the continuous and stable conveying of bamboo.

[0036] like Figure 7 and Figure 9As shown, particularly crucially, during the actual operation of this device, to prevent the bamboo from directly impacting the blade 111 during the feeding stage due to instability at the front end, causing blade chipping or surface scratches, the blade holder 110 and the second connecting frame 109 are configured as a sliding connection. Furthermore, a lifting assembly is specifically utilized to implement a delayed downward pressure control mechanism based on bamboo position feedback. This lifting assembly is used to drive the blade 111 and the rotary blade 115 to rise and fall. It includes a rotating frame 301, which is rotatably connected to the second connecting frame 109 via a pin. Torsion springs 304, symmetrically distributed along the front and rear of the rotating frame 301, are fixed between the rotating frame 301 and the second connecting frame 109, providing an upward restoring torque. The second connecting frame 109 has a sliding connection of a push-pull frame 305 symmetrically distributed along its front and rear. The push-pull frame 305 slides in the left and right direction. The push-pull frame 305 is connected to the rotating frame 301 through a movable groove or a linkage pin. The push-pull frame 305 is slidably connected to the tool holder 110 through a slanted groove. That is, the protruding pin on the side wall of the tool holder 110 is embedded in the slanted groove on the push-pull frame 305, forming a mechanical conversion mechanism of "horizontal displacement → vertical lifting".

[0037] Example 2: Based on Example 1, as follows Figure 9 As shown, to improve the surface quality of the finished product, the device integrates a finishing unit: a second motor 302 is fixedly connected to a rotating frame 301, and its output shaft is fixedly connected to a cleaning roller 303, which is rotatably connected to the rotating frame 301. The surface of the cleaning roller 303 is covered with a fine-grained abrasive layer or flexible bristles, which is used to lightly polish or remove dust from the surface of the bamboo after scraping, removing tiny burrs and residual debris, thus achieving an integrated scraping and cleaning operation.

[0038] like Figure 1 and Figure 10 As shown, to ensure accurate initial positioning of the bamboo, a calibration frame 401 is provided on the right side of the device. The calibration frame 401 is slidably connected to the right side of the frame 101 and is cushioned by a second spring 402, which is fixed between the calibration frame 401 and the frame 101. Inclined guide surfaces are provided on both the front and rear sides of the calibration frame 401. When the operator places the split bamboo to be scraped onto it, the bamboo automatically centers under the action of gravity and the guide surfaces, and then pushes it horizontally to the left along the calibration frame 401 to smoothly insert it into the rightmost conveyor roller group.

[0039] The working process of this invention is as follows:

[0040] The split, semi-circular or arc-shaped bamboo is placed on the calibration frame 401 with the arched side facing upwards. Guided by the inclined guide surfaces on both sides, the bamboo automatically centers itself. The operator pushes it horizontally to the left, inserting the right end of the bamboo between the rightmost first conveyor roller 104 and the second conveyor roller 107. The first motor 202 and the second motor 302 are started, and the conveying system begins to operate. The bamboo is held by the upper and lower conveyor rollers and conveyed to the left at a uniform speed.

[0041] The delayed downward pressure control mechanism of the lifting assembly operates as follows: Initially, each cutter 111 is supported by the cutter holder 110 and held at a high position, with sufficient clearance between it and the lower support frame 113 to ensure the bamboo material can smoothly enter the scraping area without obstruction. When the left end of the bamboo material touches and pushes the left trigger surface of the rotating frame 301, it indicates that the bamboo material has completely entered the scraping position and the main body has covered the entire scraping area. At this time, the left end of the bamboo material applies a leftward pushing force to the rotating frame 301, forcing the rotating frame 301 to overcome the preload of the torsion spring 304 and swing downwards around its pin axis with the second connecting frame 109.

[0042] During the downward swing of the rotating frame 301, the movable groove or linkage pin provided on it drives the corresponding push-pull frame 305 to slide horizontally to the left. Since the tool holder 110 has a protruding pin on its side wall, which is embedded in the inclined groove of the push-pull frame 305, when the push-pull frame 305 moves to the left, the protruding pin slides along the inclined trajectory of the inclined groove, thereby converting the horizontal displacement into a vertical downward force on the tool holder 110, driving the tool holder 110 together with the three tools 111 and the rotating tool 115 to descend synchronously.

[0043] When the blade holder 110 descends to the set position, the arc-shaped cutting edges of each blade 111 gently fit against the area to be scraped on the outer surface of the bamboo. At this time, the bamboo is stably clamped by the upper and lower conveyor rollers, and the bottom is reliably supported by the support frame 113, and the whole is in a controlled state.

[0044] Subsequently, the bamboo material continued to move to the left, its outer surface passing through three stepped blades 111 in sequence:

[0045] The first scraper is positioned at the highest point and is mainly used to roughly scrape the protruding parts of the bamboo joints, removing most of the green skin and hard nodules of the bamboo joints.

[0046] The second scraper is positioned appropriately to perform the main scraping of the main green skin layer;

[0047] The third scraper is positioned lowest and performs a fine scraping to ensure a smooth surface without residue.

[0048] Meanwhile, the bamboo is scraped by two freely rotating blades 115, which passively rotate along the contour of the bamboo to remove residual green skin from the sides and the shaded areas of the bamboo nodes. In addition, a second motor 302 drives a cleaning roller 303 to rotate continuously, which refines the scraped surface, removing tiny burrs and dust, thus completing a high-quality scraping operation.

[0049] Therefore, it can be seen that the cutting tool 111 does not contact the workpiece as soon as the bamboo enters the cutting zone. Instead, it automatically presses down through the mechanical linkage of the lifting component after the left end of the bamboo has passed through the cutting zone and touched the rotating frame 301. This design cleverly uses the bamboo itself as the triggering medium, realizing the process logic of "positioning first, then scraping", effectively avoiding the impact and processing defects of the cutting tool 111 caused by the bamboo shaking, uneven ends, or bending in the early stage of feeding.

[0050] After the bamboo has completely passed through the rotating frame 301, the thrust acting on it disappears, the torsion spring 304 releases its stored energy, and drives the rotating frame 301 to reset upwards. During the reset process, the push-pull frame 305 is pushed in the opposite direction and slides to the right, lifting the knife holder 110 back to its initial high position through the inclined groove, reserving a safe space for the next bamboo to be fed, completely avoiding the risk of "knife collision", thus forming a complete "avoidance-trigger-press-scrape-reset" working cycle.

[0051] The entire device requires no electronic sensors or complex control systems, relying entirely on the bamboo itself as the triggering medium. Through purely mechanical linkage, it achieves a complete operational cycle of "feeding avoidance—reaching the target position trigger—automatic pressing—staged scraping—fine-tuning and cleaning—reset and standby." This design significantly improves the equipment's adaptability to geometric variations in natural bamboo, operational safety, and finished product consistency, making it particularly suitable for the mass production needs of small and medium-sized bamboo product processing plants.

[0052] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of the invention. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. A device for scraping the outer surface of bamboo during processing, characterized in that, The system includes a frame (101), on which a first connecting frame (102) is fixedly connected. Multiple rotating shafts (103) are rotatably connected to the first connecting frame (102). A first conveying roller (104) is fixedly connected to each rotating shaft (103). Multiple lifting frames (105) are slidably connected to the first connecting frame (102). A conveying shaft (106) is rotatably connected to each lifting frame (105). A second conveying roller (107) is fixedly connected to each conveying shaft (106). The lifting frame (105) and the first... At least one first spring (108) is fixedly connected between the connecting frames (102). A second connecting frame (109) is fixedly connected to the middle of the first connecting frame (102). A tool holder (110) is provided on the second connecting frame (109). At least three tools (111) arranged in a stepped manner are slidably connected on the tool holder (110). Threaded columns (112) symmetrically distributed along the tools (111) are rotatably connected to the second connecting frame (109). The threaded columns (112) are threadedly connected to the tools (111). It also includes a fixing frame (114), which is fixed to the cutting tool (111) on one side, and at least two rotating blades (115) are rotatably connected to the fixing frame (114). The tool holder (110) is slidably connected to the second connecting frame (109), and the second connecting frame (109) is provided with a lifting assembly for driving the tool (111) and the rotary tool (115) to rise and fall; The lifting assembly includes a rotating frame (301), which is rotatably connected to the second connecting frame (109). A torsion spring (304) is fixed between the rotating frame (301) and the second connecting frame (109) and is symmetrically distributed along the rotating frame (301). A push-pull frame (305) is slidably connected inside the second connecting frame (109) and is symmetrically distributed along the second connecting frame (109). The rotating frame (301) is used to push and pull the push-pull frame (305) to slide horizontally. The push-pull frame (305) is slidably connected to the knife holder (110) through an inclined groove. It also includes a second motor (302) and a cleaning roller (303). The second motor (302) is fixedly connected to the rotating frame (301), and the cleaning roller (303) is rotatably connected to the rotating frame (301). The cleaning roller (303) is fixedly connected to the output shaft of the second motor (302).

2. The bamboo processing outer surface scraping device as described in claim 1, characterized in that, The bottom of the cutting tool (111) is set to be arc-shaped.

3. The bamboo processing outer surface scraping device as described in claim 2, characterized in that, It also includes a support frame (113), which is fixed to the middle of the first connecting frame (102) and is located below the tool holder (110).

4. The bamboo processing outer surface scraping device as described in claim 3, characterized in that, It also includes a fixed frame (201) symmetrically distributed along the first connecting frame (102), the fixed frame (201) is fixed to the frame (101), and a first motor (202) is fixed inside the fixed frame (201). The first motor (202) and the nearby rotating shaft (103) are driven by a gear set (203).

5. The bamboo processing outer surface scraping device as described in claim 4, characterized in that, It also includes a calibration frame (401), which is slidably connected to the frame (101), and a second spring (402) is fixed between the calibration frame (401) and the frame (101).

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