Abrasive belt polishing machine

Abstract

The utility model discloses an abrasive belt polishing machine which comprises a driving wheel, a driven wheel, an abrasive belt, a rotating shaft and a rotating driving assembly. The abrasive belt sleeves the driving wheel and the driven wheel, and the rotation driving assembly can drive the driving wheel to rotate through the rotating shaft so as to cooperate with the driven wheel to realize circulation of the abrasive belt; the abrasive belt which continuously moves is used for polishing a workpiece, the polishing efficiency can be improved, the polishing continuity and efficiency are guaranteed, the downtime is shortened, the machining amount in unit time is increased, and the overall production efficiency is improved. The rotating shaft is detachably connected with the driving wheel, the abrasive belts or the driving wheels of different specifications can be replaced according to polishing requirements, deviation adjustment can be conveniently conducted on the abrasive belts, the use reliability of the polishing machine is facilitated, and the applicability of the polishing machine is improved.

Description

Technical Field

[0001] This application relates to the field of polishing technology after grinding of internal workpieces, and in particular to a belt polishing machine. Background Technology

[0002] In the precision workpiece manufacturing process, after grinding the workpiece, in order to further improve the quality of the workpiece and enable it to meet higher standard usage requirements, it is necessary to polish the workpiece to improve its surface accuracy and optimize its surface roughness.

[0003] In traditional production lines, based on past technical experience and cost considerations, polishing is mostly achieved by friction between a cloth wheel and the workpiece surface. The cloth wheel is soft and has a certain degree of elasticity. Driven by a motor or other power equipment, it rotates at high speed and makes full contact with the workpiece surface. Through continuous friction, the tiny protrusions on the workpiece surface are gradually smoothed out, thereby achieving the polishing effect.

[0004] However, this polishing method has many limitations when dealing with large, high-roughness workpieces. Large workpieces mean the buffing wheel needs to cover a larger area, making it difficult to ensure uniform contact between the wheel and the workpiece surface. Furthermore, the effective polishing range of each buffing wheel is limited, and polishing the entire workpiece requires a significant amount of time. Simultaneously, the surface of high-roughness workpieces inherently has significant unevenness, making it difficult for the buffing wheel to quickly smooth these rough areas, resulting in extremely low polishing efficiency. Therefore, to improve the polishing effect, manual rough polishing is often required. This further increases the time spent on the polishing process, extends the production cycle, and increases costs. Summary of the Invention

[0005] The purpose of this application is to overcome the shortcomings of the prior art and provide a belt polishing machine.

[0006] This application provides a belt polishing machine, comprising: a drive wheel and a driven wheel, which are spaced apart; an abrasive belt, which is sleeved on the drive wheel and the driven wheel; a rotating shaft, which is detachably connected to the drive wheel; and a rotary drive assembly for driving the rotating shaft to rotate. During operation, the rotary drive assembly is activated, driving the rotating shaft to rotate, which in turn drives the drive wheel to rotate. Under the traction of the abrasive belt, the driven wheel rotates accordingly. The drive wheel and the driven wheel cooperate to make the abrasive belt flow, so as to facilitate the polishing of the workpiece.

[0007] Furthermore, the diameter of the driving wheel is larger than that of the driven wheel; and / or, the surfaces of the driving wheel and / or the driven wheel are convex, so that when the sand belt is tensioned, it can form a wrap angle with the convex surface, thereby preventing the sand belt from running off-center.

[0008] Furthermore, a protective plate is provided between the driving wheel and the driven wheel, and the protective plate is located within the annular structure formed by the sand belt; multiple perforations are provided on the protective plate; the end of the protective plate near the driven wheel extends in an inclined curve toward the top of the driven wheel.

[0009] Furthermore, the belt polisher also includes a protective cover, with the drive wheel and driven wheel located inside the cover; the top of the cover has an opening to expose part of the drive wheel and the sanding belt.

[0010] Furthermore, the cover includes a housing and a cover, with one side of the housing open and the cover being flip-open on the open side of the housing; one of the housing and the cover is provided with a buckle and the other with a hook, so that the buckle engages with the hook, the cover can cover the open side of the housing, so that the buckle disengages from the hook, and the cover can be flipped open to open the housing.

[0011] Furthermore, the belt polisher also includes a flip cover, which is rotatably located on the side of the cover near the drive wheel; the flip cover can swing closer to or further away from the drive wheel, thereby changing the size of the opening.

[0012] Furthermore, an air pipe is provided on one side of the protective cover. When the air pipe is connected to a negative pressure device, the negative pressure device can draw air from inside the protective cover through the air pipe.

[0013] Furthermore, the belt polishing machine also includes an auxiliary mechanism, which includes: a support and a swing seat, the swing seat being rotatably mounted on the support and connected to the driven wheel; a first elastic element, disposed between the support and the swing seat; the first elastic element extending along the arrangement direction of the driving wheel and the driven wheel, and being able to press against the swing seat, so that the driven wheel has a tendency to move away from the driving wheel, so as to facilitate the tensioning of the belt by the driving wheel and the driven wheel.

[0014] Furthermore, the swing seat is equipped with a handle, which the worker can operate to rotate the swing seat; when the swing seat compresses the first elastic element, the driven wheel moves closer to the driving wheel to facilitate the removal of the sanding belt.

[0015] Furthermore, the support includes: a first mounting block and a second mounting block, which are spaced apart along the arrangement direction of the driving wheel and the driven wheel; an adjusting mounting block, rotatably disposed between the first and second mounting blocks, and the swing seat connected to the adjusting mounting block; along the axial direction of the driven wheel, a first pressure block is provided on one side of the adjusting mounting block, and a second pressure block is provided on the other side; the belt sander also includes: a pressure rod connected to the first pressure block; a second elastic element connected to the second pressure block; by pressing down the first pressure block with the pressure rod, the second pressure block swings up, the second elastic element is stretched, and the adjusting mounting block drives the driven wheel to swing up; by lifting the first pressure block with the pressure rod, the second pressure block swings down, the second elastic element is compressed, and the adjusting mounting block drives the driven wheel to swing down; the adjusting mounting block can drive the swing seat and the driven wheel to swing axially, thereby realizing the adjustment of the sanding belt.

[0016] This application provides a belt polishing machine, including a drive wheel, a driven wheel, a sanding belt, a rotating shaft, and a rotating drive assembly. The sanding belt is sleeved on the drive wheel and the driven wheel. The rotating drive assembly can drive the drive wheel to rotate via the rotating shaft, thereby cooperating with the driven wheel to realize the flow of the sanding belt. Polishing workpieces using a continuously moving sanding belt can improve polishing efficiency, ensure the continuity and high efficiency of polishing, reduce downtime, increase the processing volume per unit time, and improve overall production efficiency. The rotating shaft is detachably connected to the drive wheel, allowing for the replacement of sanding belts or drive wheels of different specifications according to polishing needs. It also allows for easy adjustment of the sanding belt, which is beneficial to the reliability of the polishing machine and improves its applicability. Attached Figure Description

[0017] Figure 1 This application provides a schematic diagram of the structure of a belt polishing machine;

[0018] Figure 2 for Figure 1 The diagram shows a structural schematic of the belt polisher from another angle.

[0019] Figure 3 for Figure 1 The diagram shows a cross-sectional view of the belt polisher.

[0020] Figure 4 A schematic diagram of an auxiliary mechanism provided in this application;

[0021] Figure 5 for Figure 4 The auxiliary mechanism shown is a structural schematic diagram from another angle. Detailed Implementation

[0022] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0023] This application provides a belt polishing machine, including: a drive wheel 11 and a driven wheel 12, which are spaced apart; an abrasive belt 13, which is sleeved on the drive wheel 11 and the driven wheel 12; a rotating shaft 14, which is detachably connected to the drive wheel 11; and a rotary drive assembly 15 for driving the rotating shaft 14 to rotate. During operation, the rotary drive assembly 15 is activated, driving the rotating shaft 14 to rotate, which in turn drives the drive wheel 11 to rotate. Under the traction of the abrasive belt 13, the driven wheel 12 rotates accordingly. The drive wheel 11 and the driven wheel 12 cooperate to make the abrasive belt 13 flow, so as to polish the workpiece.

[0024] Specifically, the abrasive belt 13 includes a base belt and abrasive. The abrasive is densely distributed on the surface of the base belt through a binder, giving the base belt high roughness and hardness. Thus, the base belt has grinding capability and surface processing precision.

[0025] More specifically, common substrate materials include paper, cloth, and composite substrates. Paper substrates are low in cost and have a uniform texture, making them suitable for light-duty grinding and fine polishing; cloth substrates have high strength and good toughness, and can withstand greater grinding forces, making them commonly used for heavy-duty grinding and rough polishing; composite substrates combine the advantages of paper and cloth, resulting in excellent overall performance.

[0026] The thickness of the substrate also affects the strength and flexibility of the abrasive belt 13. Generally, a thicker substrate has higher strength and is suitable for heavy-duty grinding; a thinner substrate has better flexibility and can conform to the surface of complex-shaped workpieces, but its strength is relatively lower and it is suitable for light-duty, fine polishing and complex workpieces.

[0027] Different abrasives are suitable for different materials. Corundum abrasives, such as brown corundum and white corundum, have good toughness and strong grinding power, making them suitable for machining metal materials such as steel; silicon carbide abrasives have high hardness and sharp cutting edge, and are often used to machine cast iron, non-ferrous metals, and non-metallic materials such as glass and ceramics; superhard abrasives, such as diamond and cubic boron nitride, have extremely high hardness and are mainly used to machine high-hardness, difficult-to-machine materials, such as cemented carbide and optical glass.

[0028] The abrasive grit size also affects the grinding capability and surface finish of the abrasive belt 13. Coarse grit (e.g., 24-60 mesh) has strong grinding force and is used to remove large amounts of material or to rough polish high-roughness workpieces; fine grit (e.g., 100-200 mesh) is used for semi-finish polishing to make the workpiece surface initially smooth; even finer grit (above 200 mesh, even up to 1000 mesh or 2000 mesh) is used for finish polishing to obtain extremely high surface finish.

[0029] In summary, for abrasive belt 13, the base material, base thickness, abrasive material and / or abrasive particle size can all affect its quality.

[0030] In actual equipment, various specifications of abrasive belts 13 can be prepared, so that these abrasive belts 13 have different base materials, base thicknesses, abrasive materials and / or abrasive particle sizes. When dealing with different workpieces to be polished, the appropriate abrasive belt 13 can be selected for processing, thereby effectively ensuring polishing efficiency and improving the applicability of the polishing machine.

[0031] The rotary drive assembly 15 can be any rotary drive component that can make the rotary shaft 14 rotate, such as a rotary cylinder or a motor.

[0032] In one specific embodiment, refer to Figure 1The rotary drive assembly 15 includes a motor, which is fixedly mounted in the frame and connected to the rotary shaft 14 via a synchronous belt assembly. The rotary shaft 14 is rotatably mounted on the top surface of the frame via a bearing bracket, and the drive pulley 11 is located at the end of the rotary shaft 14 away from the motor. During operation, the motor drives the rotary shaft 14 to rotate via the synchronous belt assembly. The rotary shaft 14 drives the drive pulley 11 to rotate, and the sanding belt 13 begins to move under the traction of the drive pulley 11, further driving the driven pulley 12 to rotate. The drive pulley 11 and the driven pulley 12 cooperate to make the sanding belt 13 circulate.

[0033] This continuous movement of the abrasive belt 13 prevents excessive wear of the abrasive in specific areas of contact with the workpiece, thus avoiding inconsistent abrasive wear and resulting in varying polishing levels across different workpiece surfaces, making it impossible to achieve uniform surface precision and roughness. It also prevents heat buildup from continuous friction in specific areas, avoiding burns to the workpiece surface and affecting its physical properties and surface quality. Furthermore, it reduces abrasive clogging and prevents excessive abrasive fatigue, thereby extending the belt's lifespan. In addition, the constantly moving abrasive belt 13 consistently cuts the workpiece with sharp abrasive, maintaining stable and efficient polishing, ensuring the continuity and efficiency of the polishing process, reducing downtime, increasing throughput per unit time, and improving overall production efficiency.

[0034] Furthermore, the drive wheel 11 is detachably connected to the rotating shaft 14.

[0035] In one embodiment, the drive wheel 11 and the rotating shaft 14 are detachably connected by a key.

[0036] For example, keyways are provided on the hubs of the rotating shaft 14 and the drive wheel 11. A flat key is embedded into the keyway of the rotating shaft 14, and then the keyway of the drive wheel 11 is aligned with the flat key for installation. A gap exists between the upper surface of the flat key and the bottom surface of the hub keyway, and the side surface fits tightly with the side surface of the hub keyway, allowing torque to be transmitted through the compression of the key's side surface. This connection method is simple in structure, easy to install and disassemble, and has good centering, making it suitable for high-precision, high-speed applications or applications subjected to variable loads and impacts.

[0037] For example, the hub holes of the rotating shaft 14 and the driving wheel 11 are respectively provided with multiple equally spaced key teeth and keyways. The tooth flanks of the rectangular spline are the working surfaces, and torque is transmitted through the extrusion of the tooth flanks. Small-diameter centering is used to center the rectangular spline, which has high centering accuracy and good centering stability. It can also eliminate heat treatment deformation by grinding, making it suitable for applications with large loads and high centering accuracy requirements.

[0038] In another embodiment, the drive wheel 11 and the rotating shaft 14 are detachably connected by a pin.

[0039] For example, both the rotating shaft 14 and the driving wheel 11 have pin holes. Inserting a cylindrical pin into the corresponding pin hole connects the rotating shaft 14 and the driving wheel 11. The cylindrical pin is fixed in the pin hole by an interference fit, and can be separated from the rotating shaft 14 and the driving wheel 11 by external force. However, repeated assembly and disassembly will reduce the positioning accuracy of the cylindrical pin and the reliability of the connection. Therefore, cylindrical pins are often used to transmit small loads or as positioning elements.

[0040] For example, both the rotating shaft 14 and the driving wheel 11 are provided with pin holes. A tapered pin is inserted into the pin hole to connect the rotating shaft 14 and the driving wheel 11. The tapered pin has a taper of 1:50. During installation, the pin is driven into the pin hole, and the fixing is completed by the friction of the tapered surface and the interference fit. The tapered pin has high positioning accuracy and is easy to install and remove. Even with repeated installation and removal, its positioning accuracy is minimally affected. It is often used in applications that require frequent disassembly and high positioning accuracy.

[0041] In another embodiment, the drive wheel 11 and the rotating shaft 14 are detachable via a threaded connection.

[0042] For example, a through hole is machined on the hub of the drive wheel 11, and a threaded hole is machined on the rotating shaft 14. A bolt is passed through the through hole in the hub and screwed into the threaded hole in the shaft. The preload of the bolt ensures that the drive wheel and the shaft fit tightly together, and the torque is transmitted by the friction between the mating surfaces. This connection method is easy to install and disassemble, can be reused multiple times, and is suitable for various load conditions.

[0043] In other embodiments, the drive wheel 11 and the rotating shaft 14 are detachably connected by an expansion sleeve.

[0044] Specifically, one or more expansion sleeves are installed between the rotating shaft 14 and the hub hole of the drive wheel 11. The expansion sleeve consists of two halves with mating inner and outer conical surfaces. By tightening the bolts, the inner and outer rings of the expansion sleeve are displaced relative to each other. The outer surface of the expansion sleeve expands, making close contact with the hub hole, while the inner surface contracts, making close contact with the shaft. Thus, torque and axial force are transmitted through friction. The expansion sleeve connection has high alignment accuracy, is easy to install and remove, and avoids weakening of the shaft and hub.

[0045] This application does not limit the specific connection method between the drive wheel 11 and the rotating shaft 14.

[0046] Figure 1 In the embodiment shown, the drive wheel 11 and the rotating shaft 14 are connected by a multi-stage bushing and a clamping screw, which makes them easy to detach and fasten.

[0047] The drive wheel 11 is detachable from the rotating shaft 14, allowing for the replacement of the drive wheel 11 with different specifications of sanding belt 13 to better meet various polishing needs. Alternatively, a suitable drive wheel 11 can be replaced according to the specifications of the sanding belt 13 for support and tension. After prolonged use, if the sanding belt 13 slips or deviates from the drive wheel 11, the drive wheel 11 or sanding belt 13 can be adjusted by releasing the fixation between the drive wheel 11 and the rotating shaft 14. This ensures the reliability of the belt polisher and improves its applicability.

[0048] Optionally, the diameter of the driving wheel 11 is larger than the diameter of the driven wheel 12.

[0049] The larger wheel diameter results in a longer contact arc between the drive wheel 11 and the sanding belt 13, allowing the sanding belt 13 to adhere more closely to the wheel surface during rotation. The drive wheel 11 provides a stable support platform for the sanding belt 13, reducing vibration caused by uneven force during high-speed operation. Compared to a smaller-diameter drive wheel 11, which has a shorter contact arc with the sanding belt 13, the sanding belt 13 is prone to localized loosening or jumping during operation, leading to poor polishing results. The larger-diameter drive wheel 11 effectively avoids this situation, ensuring the smooth operation of the sanding belt and thus improving the polishing quality of the workpiece.

[0050] Meanwhile, the larger diameter of the drive pulley 11 provides stronger guidance for the sanding belt 13. When the sanding belt 13 rotates between the drive pulley 11 and the driven pulley 12, the larger drive pulley 11 can better guide the sanding belt 13 along the correct trajectory, reducing the possibility of the sanding belt deviating.

[0051] Furthermore, when the angular velocities of the driving wheel 11 and the driven wheel 12 are the same, the larger diameter of the driving wheel 11 means a higher linear velocity. The linear velocity of the abrasive belt 13 directly affects the polishing efficiency. A higher linear velocity allows the abrasive belt 13 to contact the workpiece surface more times per unit time, thereby accelerating the removal of material from the workpiece surface. An appropriate high-speed linear velocity can also make the cutting trajectory of the abrasive on the workpiece surface more uniform, contributing to a smoother surface and optimizing the polishing effect.

[0052] When the diameter of the driving wheel 11 is larger than that of the driven wheel 12, the tension distribution of the abrasive belt 13 between the two wheels changes. The tension of the abrasive belt at the driving wheel 11 is relatively large, which allows the abrasive belt 13 to apply more stable and greater pressure when in contact with the workpiece. During polishing, appropriate pressure helps the abrasive to better penetrate the workpiece surface, improving grinding efficiency. Especially for workpieces with high hardness or large surface roughness, this pressure adjustment can significantly improve the polishing effect.

[0053] A reasonable tension distribution can also ensure the stability of the abrasive belt throughout the polishing process, avoiding damage to the abrasive belt or affecting the polishing quality due to uneven tension.

[0054] In polishing workpieces with special shapes or different polishing requirements, the difference in wheel diameter between the driving wheel 11 and the driven wheel 12 can help achieve differentiated polishing of different areas of the workpiece. For example, for a workpiece that requires finer polishing on one end and requires faster removal of more material on the other end, the workpiece can be brought into contact with abrasive belts 13 of different wheel diameters. The changes in linear velocity and pressure caused by the difference in wheel diameter can be used to meet the polishing needs of different areas of the workpiece.

[0055] Optionally, the surfaces of the driving wheel 11 and / or driven wheel 12 are convex, and when the sanding belt 13 is tensioned, it can form a wrap angle with the convex surfaces, thereby preventing the sanding belt 13 from deviating.

[0056] The wrap angle formed by the outer cam surface and the abrasive belt 13 guides the abrasive belt 13 to always run along the convex contour of the wheel surface. When the abrasive belt 13 is disturbed by external factors, such as uneven local stress caused by uneven workpiece surface, the wrap angle allows the abrasive belt 13 to automatically return to the correct path after deviating from its normal position, greatly reducing the possibility of the abrasive belt 13 going astray. At the same time, the wrap angle makes the contact between the abrasive belt 13 and the wheel surface tighter and more stable. During the polishing process, the abrasive belt 13 rotates at high speed, and the wrap angle formed by the convex wheel surface and the abrasive belt 13 effectively suppresses the lateral sway and vibration of the abrasive belt 13. Because the two sides of the abrasive belt 13 are constrained by the convex part of the wheel surface, it is like providing support for the edges of the abrasive belt 13, ensuring the stability of the abrasive belt 13 during operation, which is conducive to improving the polishing quality of the workpiece and avoiding uneven marks left on the workpiece surface due to the vibration of the abrasive belt 13.

[0057] Furthermore, due to the wrap angle, the abrasive belt 13 maintains a relatively consistent contact angle and pressure with the workpiece at different points as it wraps around the wheel surface, preventing uneven polishing of the workpiece surface caused by excessive or insufficient local pressure from the abrasive belt 13. For workpieces with complex curved surfaces, the wrap angle formed by the outward convexity of the wheel surface and the abrasive belt 13 allows the abrasive belt to better conform to the workpiece surface. The abrasive belt 13 can adjust its contact angle with the wheel surface according to the changes in the workpiece's curvature, always maintaining a good contact state, thereby effectively polishing workpieces with complex shapes.

[0058] The wrap angle formed by the outward convexity of the wheel surface and the sanding belt 13 can also disperse the wear of the sanding belt 13 and reduce stress concentration, thereby improving the service life of the sanding belt 13.

[0059] Optionally, a protective plate 21 is provided between the driving wheel 11 and the driven wheel 12. The protective plate 21 is located within the annular structure formed by the sand belt 13. Multiple perforations are provided on the protective plate 21. The end of the protective plate 21 near the driven wheel 12 extends in an inclined curve toward the top of the driven wheel 12.

[0060] For details, please refer to Figure 3In the illustrated embodiment, the left end of the protective plate 21 is close to the driving wheel 11 and the right end is close to the driven wheel 12. At the same time, the right end of the protective plate 21 extends upward in a curved shape.

[0061] During the polishing process of the workpiece by the abrasive belt 13, a large amount of debris, abrasive shavings, and sparks that may be generated due to friction are produced. The protective plate 21 is located inside the annular structure formed by the abrasive belt 13, which can effectively block these splashes from flying outward and prevent debris from scattering in the work area, ensuring a safe and clean working environment.

[0062] The inclined curved protective plate 21 can also guide the debris thrown out by the sanding belt 13 to move in a specific direction, avoiding debris accumulation and interference with the normal operation of the wheel and sanding belt 13.

[0063] Combined with reference Figure 1 and Figure 2 The surface of the protective plate 21 is densely covered with multiple perforations.

[0064] The perforations help guide the airflow generated during the polishing process of the abrasive belt 13. When the abrasive belt 13 rotates at high speed, it drives the surrounding airflow to form airflow. The perforations allow the airflow to pass through the protective plate 21 more orderly, thereby avoiding interference with the operation of the abrasive belt 13 due to airflow turbulence, which is beneficial to the stability of the operation of the abrasive belt 13.

[0065] When the protective plate 21 collects debris, the debris is more easily concentrated in a certain area under the guidance of airflow and curved structure, which facilitates subsequent collection and cleaning work, and can also reduce the contamination and damage of debris to other parts of the equipment.

[0066] Optionally, the belt polisher provided in this application also includes a protective cover 22, in which the drive wheel 11 and the driven wheel 12 are disposed; the top of the protective cover 22 is provided with an opening to expose part of the drive wheel 11 and the sanding belt 13.

[0067] For details, please refer to Figure 2 In the illustrated embodiment, the driven wheel 12 is completely hidden inside the protective cover 22, while the driving wheel 11 and a section of abrasive belt 13 are exposed through an opening. During polishing, the workpiece can come into contact with this section of abrasive belt 13.

[0068] The protective cover 22 prevents external debris from entering the work area. In industrial production environments, various fine particles, fibers, and other debris may be present. If these enter the transmission parts between the drive wheel and driven wheel and the sanding belt 13, they may become entangled on the wheels, causing abnormal operation of the sanding belt 13 or even equipment failure. The protective cover 22 provides a protective barrier for the core transmission components of the equipment, ensuring their stable operation. At the same time, the high-speed rotating drive wheel 11, driven wheel 12, and sanding belt 13 pose potential dangers to operators. The protective cover 22 prevents these from coming into contact with operators, improving workshop safety.

[0069] The abrasive belt 13 generates a large amount of dust during the polishing process. This dust not only pollutes the workplace air but also affects the health of operators and may even damage surrounding equipment. Installing the protective cover 22 can limit the spread of dust.

[0070] Optionally, the cover 22 includes a housing 22a and a cover 22b. One side of the housing 22a is open, and the cover 22b is flip-mounted on the open side of the housing 22a. One of the housing 22a and the cover 22b is provided with a buckle 22c and the other is provided with a hook 22d, so that the buckle 22c engages with the hook 22d, the cover 22b can cover the open side of the housing 22a, so that the buckle 22c disengages from the hook 22d, and the cover 22b can be flipped to open the housing 22a.

[0071] For details, please refer to Figure 2 In the illustrated embodiment, the side of the cover 22a away from the rotation axis 14 is open, and the cover 22b is rotatably disposed at the lower end of the open side of the cover 22a via a hinge; when the cover 22b is flipped down, the side of the cover 22a is open, so as to facilitate the installation, adjustment and maintenance of the parts inside the cover; when the cover 22b is flipped up, it can close the side of the cover 22a, so that the cover 22 returns to a state that can protect the parts.

[0072] Continue to refer to Figure 2 The cover 22b has three sets of hooks 22d, which are spaced apart; the shell 22a has three sets of buckles 22c. When the worker moves the buckles 22c, the buckles 22c can be engaged or disengaged from the hooks 22d, thereby closing or opening the cover 22.

[0073] The openable design of the protective cover 22 makes the installation, replacement, and adjustment of the drive wheel 11, driven wheel 12, and sanding belt 13 more convenient and feasible.

[0074] Optionally, the belt polisher provided in this application also includes a flip cover 23, which is rotatably disposed on the side of the cover 22 near the drive wheel 11; the flip cover 23 can swing closer to or further away from the drive wheel 11 to change the size of the opening.

[0075] For details, please refer to Figures 1 to 3 In the illustrated embodiment, a flip cover 23 is provided on the upper side of the end of the cover 22 away from the driven wheel 12. The flip cover 23 can cover part of the driving wheel 11. When the flip cover 23 rotates toward the driving wheel 11, the opening of the flip cover 23 can be reduced; when the flip cover 23 rotates away from the driving wheel 11, the opening of the flip cover 23 can be increased.

[0076] The rotatable design of the flip cover 23 allows it to flexibly shield dangerous areas, reducing the probability of accidents and providing operators with more comprehensive safety protection. When maintenance, repair, or replacement of the drive wheel 11, sanding belt 13, or related transmission components is required, keeping the flip cover 23 away from the drive wheel 11 facilitates the full exposure of these components, making it easier for maintenance personnel to identify and operate on them. If abnormal equipment operation occurs and a problem is suspected with the drive wheel 11 or its surrounding components, a preliminary inspection can be performed by opening the flip cover 23. This allows for quick observation of the operation of the drive wheel 11, the tension of the sanding belt 13, etc., thereby quickly locating the fault point and facilitating subsequent maintenance. During polishing, operators can appropriately open the flip cover 23 to observe the operation of the drive wheel 11 driving the sanding belt 13, such as the contact state between the sanding belt 13 and the workpiece, and the polishing effect on the workpiece surface, so as to adjust polishing parameters in a timely manner and ensure polishing quality.

[0077] The opening size is adjustable, which makes it easy for operators to place the workpiece in the right position. Especially for some larger or irregularly shaped workpieces, the flip cover 23 can provide more operating space after opening, making it easier to adjust the position of the workpiece and ensure that the sanding belt 13 is in full and correct contact with the workpiece, thereby improving the polishing effect.

[0078] Furthermore, Figure 1 In the illustrated embodiment, a handle is provided on one side of the flip cover 23, allowing the operator to easily rotate the flip cover 23 by operating the handle. The handle also features a fastening structure; after the flip cover 23 is flipped into place, locking the fastening structure secures the flip cover 23 and prevents accidental flipping. The fastening structure can be a bolt, a pull pin, or similar material.

[0079] Optionally, a duct 24 is provided on one side of the protective cover 22. When the duct 24 is connected to a negative pressure device, the negative pressure device can draw air from inside the protective cover 22 through the duct 24.

[0080] As mentioned above, the polishing process of the sanding belt 13 will generate a lot of dust. The air pipe 24 is set up to connect to the negative pressure equipment. During the polishing process, the dust can be extracted from the protective cover 22 by the negative pressure equipment, thereby ensuring the cleanliness of the production environment.

[0081] Figure 2 and Figure 3 In the embodiment shown, the end of the protective cover 22 away from the drive wheel 11 is provided with an air pipe 24. The position of the air pipe 24 and the opening position are one above the other and one to the left and one to the right, which is conducive to airflow and can avoid airflow interference with the sand belt 13 while removing dust.

[0082] Optionally, the belt polishing machine provided in this application further includes an auxiliary mechanism, which includes: a support 31 and a swing seat 32, the swing seat 32 being rotatably mounted on the support 31 and connected to the driven wheel 12; a first elastic member 33, disposed between the support 31 and the swing seat 32; the first elastic member 33 extending along the arrangement direction of the driving wheel 11 and the driven wheel 12, and being able to press against the swing seat 32, so that the driven wheel 12 has a tendency to move away from the driving wheel 11, so as to tension the sanding belt 13 between the driving wheel 11 and the driven wheel 12.

[0083] The first elastic element 33 can be made of elastic material (such as rubber, plastic, etc.) or elastic structural components such as springs and sheet springs. The first elastic element 33 has the elastic characteristic of deforming under force.

[0084] For details, please refer to Figure 1 In the illustrated embodiment, the auxiliary mechanism is located on one side of the frame, near the driven wheel 12 and in the protective cover 22.

[0085] Combined with reference Figure 4 A support 31 is mounted on a mounting plate for fixed connection to the frame. A swing seat 32 is pivotally mounted in the support 31 via a first rotating shaft, the axis of which is parallel to the axis of the driven wheel 12. One end of the support 31 is higher, and a spring is provided between the swing seat 32 and the high end of the support 31. The axle of the driven wheel 12 is mounted on the swing seat 32, which enables the driven wheel 12 to swing along the arrangement direction of the driving wheel 11 and the driven wheel 12.

[0086] The spring is pressed between the swing seat 32 and the support 31. When the driving wheel 11 and the driven wheel 12 are fitted with sanding belt 13 and the sanding belt 13 is in a taut state, the spring is in a compressed state under the action of tension and has the tendency to return to its original state. Its elastic force acts in the opposite direction on the swing seat 32, so that the driven wheel 12 has the tendency to move away from the driving wheel 11. In this way, it is beneficial to maintain the taut state of the sanding belt 13.

[0087] During the polishing process, the abrasive belt 13 is subjected to continuous vibration. The first elastic element 33 can continuously adapt to the structural displacement under vibration through its own deformation, ensuring that the driving wheel 11, driven wheel 12 and abrasive belt 13 maintain a stable position.

[0088] Optionally, the swing seat 32 is provided with a handle 34, which can be operated by the worker to rotate the swing seat 32; when the swing seat 32 compresses the first elastic element 33, the driven wheel 12 approaches the driving wheel 11 so as to facilitate the removal of the sanding belt 13.

[0089] For details, please refer to Figure 1 , Figure 2 and Figure 4In the illustrated embodiment, the handle 34 is located at the top of the base 32 and has a certain length, protruding outside the frame and the protective cover 22, so as to facilitate workers to grasp and operate it.

[0090] When the sanding belt 13 needs to be replaced, the worker operates the handle, causing the swing seat 32 to swing toward the high end of the support 31, further compressing the first elastic element 33, so that the driven wheel 12 moves closer to the driving wheel 11; at this time, the sanding belt 13 on the driven wheel 12 loses its support and tension, and can be easily detached.

[0091] Optionally, the support 31 includes: a first mounting block 31a and a second mounting block 31b, the first mounting block 31a and the second mounting block 31b being spaced apart along the arrangement direction of the driving wheel 11 and the driven wheel 12; an adjusting mounting block 31c, rotatably disposed between the first mounting block 31a and the second mounting block 31b, and the swing seat 32 being connected to the adjusting mounting block 31c; along the axial direction of the driven wheel 12, a first pressure block is provided on one side of the adjusting mounting block 31c, and a second pressure block is provided on the other side; the belt sander further includes: A pressure rod 41 is connected to a first pressure block; a second elastic element 42 is connected to a second pressure block; when the pressure rod 41 presses down on the first pressure block, the second pressure block swings up, the second elastic element 42 is stretched, and the adjusting mounting block 31c drives the driven wheel 12 to swing up; when the pressure rod 41 lifts up the first pressure block, the second pressure block swings down, the second elastic element 42 is compressed, and the adjusting mounting block 31c drives the driven wheel 12 to swing up; the adjusting mounting block 31c can drive the swing seat 32 and the driven wheel 12 to swing axially, thereby achieving the adjustment of the sanding belt 13.

[0092] For details, please refer to Figure 4 In the illustrated embodiment, the adjusting mounting block 31c extends along the arrangement direction of the driving wheel 11 and the driven wheel 12. A first mounting block 31a is located in front of the adjusting mounting block 31c, and a second mounting block 31b is located behind the adjusting mounting block 31c; the first mounting block 31a is higher than the second mounting block 31b. The swing base 32 is swayably mounted on the adjusting mounting block 31c via a first rotating shaft. The axial direction of the first rotating shaft is parallel to the axial direction of the driven wheel 12 and perpendicular to the extending direction of the first mounting block 31a. A first elastic member 33 is located between the swing base 32 and the first mounting block 31a.

[0093] Combined with reference Figure 5 The adjusting mounting block 31c is pivotally positioned between the first mounting block 31a and the second mounting block 31b via a second rotating shaft, which extends along the arrangement direction of the driving wheel 11 and the driven wheel 12. Therefore, when the adjusting mounting block 31c pivots, it can drive the swing base 32 and its driven wheel 12 to pivot up and down.

[0094] Continue to refer to Figure 5The adjusting mounting block 31c has a first pressure block and a second pressure block near the front end of the first mounting block 31a. The first pressure block is located on the left and the second pressure block is located on the right. The first pressure block has a pressure rod 41. The pressure rod 41 is a screw, and a spring is sleeved on the screw. The spring is pressed between the pressure rod 41 and the first pressure block. Rotating the screw reduces the length of the screw extending from the first pressure block, which reduces the pressure on the second elastic element 42 (in the illustrated embodiment, the second elastic element 42 is also a spring). The second elastic element 42 extends, causing the second pressure block to swing upward. Rotating the screw in the opposite direction increases the length of the screw extending from the first pressure block, which increases the pressure on the second elastic element 42. The second elastic element 42 is compressed, causing the second pressure block to swing downward.

[0095] Continue to refer to Figure 5 To facilitate operation of the pressure rod 41, the top of the pressure rod 41 is connected to a handle via a caster wheel; the worker can easily rotate the pressure rod 41 by operating the handle.

[0096] It's easy to understand that if the tension on both sides of the sanding belt 13 is uneven during operation, the sanding belt 13 will run off-center. This could be caused by factors such as component tolerances, installation errors, or component wear after prolonged use, and is often unavoidable.

[0097] Since the sanding belt 13 will shift towards the tight end, if the sanding belt 13 on the driven wheel 12 shifts away from the auxiliary mechanism, the sanding belt 13 can be induced to return to the center of the wheel surface by deflecting the end of the driven wheel 12 away from the auxiliary mechanism downward. Similarly, if the sanding belt 13 on the driven wheel 12 shifts towards the auxiliary mechanism, the sanding belt 13 can be induced to return to the center of the wheel surface by deflecting the end of the driven wheel 12 away from the auxiliary mechanism upward.

[0098] More specifically, with Figure 5 Taking an example, when the sanding belt 13 on the driven wheel 12 shifts away from the auxiliary mechanism (i.e., from left to right in the diagram), the pressure rod 41 moves upward, causing the first pressure block to swing upward, while the second pressure block swings downward. The adjusting mounting block 31c, carrying the swing seat 32, swings clockwise, causing the driven wheel 12 to swing clockwise and downward, thus achieving the offset adjustment. When the sanding belt 13 on the driven wheel 12 shifts towards the auxiliary mechanism, the pressure rod 41 moves downward, causing the first pressure block to swing downward, while the second pressure block swings upward. The adjusting mounting block 31c, carrying the swing seat 32, swings counterclockwise, causing the driven wheel 12 to swing counterclockwise and upward, thus achieving the offset adjustment.

[0099] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A belt polishing machine, characterized in that, include: A driving wheel (11) and a driven wheel (12) are provided at intervals; A sanding belt (13) is fitted onto the driving wheel (11) and the driven wheel (12); A rotating shaft (14) is provided, and the driving wheel (11) is detachably connected to the rotating shaft (14); A rotary drive assembly (15) is used to drive the rotary shaft (14) to rotate. When in operation, the rotary drive assembly (15) is activated, driving the rotary shaft (14) to rotate, which in turn drives the drive wheel (11) to rotate. Under the traction of the sanding belt (13), the driven wheel (12) rotates as well. The drive wheel (11) and the driven wheel (12) cooperate to make the sanding belt (13) flow, so that the sanding belt (13) can polish the workpiece.

2. The belt polishing machine according to claim 1, characterized in that, The diameter of the driving wheel (11) is larger than the diameter of the driven wheel (12); And / or, the surfaces of the driving wheel (11) and / or the driven wheel (12) are convex, and the sand belt (13) can form a wrap angle with the convex surface when it is tensioned, thereby preventing the sand belt (13) from deviating.

3. The belt polishing machine according to claim 1, characterized in that, A protective plate (21) is provided between the driving wheel (11) and the driven wheel (12), and the protective plate (21) is located within the annular structure formed by the sand belt (13); The protective plate (21) has multiple perforations; The protective plate (21) extends in an inclined curve toward the top of the driven wheel (12) at one end near the driven wheel (12).

4. The belt polishing machine according to claim 1, characterized in that, It also includes a protective cover (22), in which the driving wheel (11) and the driven wheel (12) are disposed; The top of the shield (22) is provided with an opening to expose part of the drive wheel (11) and the sanding belt (13).

5. The belt polishing machine according to claim 4, characterized in that, The protective cover (22) includes a housing (22a) and a cover (22b), one side of the housing (22a) being open, and the cover (22b) being flip-mounted on the open side of the housing (22a); One of the housing (22a) and the cover (22b) is provided with a buckle (22c) and the other is provided with a hook (22d), such that the buckle (22c) engages with the hook (22d), the cover (22b) can cover the open side of the housing (22a), the buckle (22c) disengages from the hook (22d), and the cover (22b) can be flipped to open the housing (22a).

6. The belt polishing machine according to claim 4, characterized in that, It also includes a flip cover (23), which is rotatably disposed on the side of the cover (22) near the drive wheel (11); The flap (23) can swing closer to or further away from the drive wheel (11) to change the size of the opening.

7. The belt polishing machine according to claim 4, characterized in that, One side of the protective cover (22) is provided with an air pipe (24). When the air pipe (24) is connected to a negative pressure device, the negative pressure device can draw air from the protective cover (22) through the air pipe (24).

8. The belt polishing machine according to any one of claims 1-7, characterized in that, It also includes auxiliary mechanisms, which include: Support (31) and swing seat (32), wherein the swing seat (32) is rotatably mounted on the support (31) and the swing seat (32) is connected to the driven wheel (12); The first elastic element (33) is disposed between the support (31) and the swing seat (32); The first elastic element (33) extends along the arrangement direction of the driving wheel (11) and the driven wheel (12), and can abut against the swing seat (32) so that the driven wheel (12) has a tendency to move away from the driving wheel (11), so that the driving wheel (11) and the driven wheel (12) can tension the sand belt (13).

9. The belt polishing machine according to claim 8, characterized in that, The base (32) is provided with a handle (34), and the worker can rotate the base (32) by operating the handle (34). When the swing seat (32) compresses the first elastic element (33), the driven wheel (12) moves closer to the driving wheel (11) to facilitate the removal of the sanding belt (13).

10. The belt polishing machine according to claim 9, characterized in that, The support (31) includes: A first mounting block (31a) and a second mounting block (31b) are provided at intervals along the arrangement direction of the driving wheel (11) and the driven wheel (12); An adjusting mounting block (31c) is rotatably disposed between the first mounting block (31a) and the second mounting block (31b), and the swing seat (32) is connected to the adjusting mounting block (31c); Along the axial direction of the driven wheel (12), the adjusting mounting block (31c) has a first pressing block on one side and a second pressing block on the other side; The belt polishing machine also includes: The pressure rod (41) is connected to the first pressure block; The second elastic element (42) is connected to the second pressure block; The first pressure block is pressed down by the pressure rod (41), the second pressure block swings up, the second elastic element (42) is stretched, and the adjusting mounting block (31c) drives the driven wheel (12) to swing up; The first pressure block is lifted by the pressure rod (41), the second pressure block swings down, the second elastic element (42) is compressed, and the adjusting mounting block (31c) drives the driven wheel (12) to swing down; The adjusting mounting block (31c) can drive the swing seat (32) and the driven wheel (12) to swing axially, thereby achieving the adjustment of the sand belt (13).

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