Rotating surface grinding device for cylindrical carbon fiber tube

Abstract

The invention relates to the field of carbon fiber tube outer rotating surface grinding, and discloses a cylindrical carbon fiber tube rotating surface grinding device which comprises a guide frame, a grinding support, an electric guide rail, a fixing block, a rotating clamping frame, a connecting rotating shaft, a sliding block, a connecting shaft, a connecting support, a guide plate, a lifting frame and the like. A grinding support is fixedly connected to the guide frame, an electric guide rail is installed on the top of the grinding support, a fixing block is fixedly connected into the guide frame, a rotating clamping frame is installed on the fixing block, and a connecting rotating shaft is rotationally connected into the fixing block. According to the device, the rotary clamping frame is in power connection with the grinding abrasive belt through the sliding shaft sleeve, the carbon fiber pipe can be effectively prevented from being damaged under the action of components such as a torsional spring during grinding, and in the descending process of the lifting frame, a U-shaped contact block makes contact with the carbon fiber pipe and can achieve the positioning function; and through double guarantee of the twisting damage prevention mechanism and the positioning mechanism, the probability that the carbon fiber tube is damaged in the polishing process can be effectively reduced, and production loss is reduced.

Description

Technical Field

[0001] The present invention relates to the field of grinding the outer rotating surface of carbon fiber tubes, and particularly to a rotating surface grinding device for cylindrical carbon fiber tubes. Background Art

[0002] The carbon fiber round tube is a high-performance tubular material made of carbon fiber composite materials, with excellent characteristics such as lightweight, high strength, high stiffness, and corrosion resistance. It is widely used in fields such as aerospace, automotive industry, sports equipment, and industrial equipment. The outer rotating surface treatment technologies of carbon fiber round tubes mainly include mechanical grinding, laser processing, and chemical polishing, etc. Mechanical grinding has become the mainstream process due to its low cost and wide adaptability.

[0003] Most of the existing equipment uses fixed abrasive belts or grinding wheels for grinding. The carbon fiber tube is placed in the grinding equipment through manual operation. However, since the small range change of the diameter of the carbon fiber tube is difficult to distinguish with the naked eye, misplacement may occur when manually placing the carbon fiber tube. Since the feed distance of the equipment is usually preset, if the placed carbon fiber tube has a slightly larger diameter, the abrasive belt or grinding wheel will exert a greater pressure on the carbon fiber tube. During the rotating grinding process, the acting force on the carbon fiber tube becomes larger, resulting in possible partial delamination or matrix cracking of the carbon fiber tube, causing losses, or leading to incorrect grinding accuracy of the carbon fiber tube, and grinding the larger-diameter carbon fiber tube according to the accuracy requirements of the smaller-diameter carbon fiber tube. Usually, a whole batch of carbon fiber tubes needs to be ground. If the problem is not discovered in time, it will cause greater losses.

[0004] Therefore, it is necessary to design a rotating surface grinding device for cylindrical carbon fiber tubes that can stop the abrasive belt in time when a larger-diameter carbon fiber tube is misplaced, so as to prevent damage to the carbon fiber tube or incorrect grinding accuracy, aiming at the disadvantages of the existing equipment that when a larger-diameter carbon fiber tube is misplaced, the abrasive belt or grinding wheel exerts a greater pressure on the carbon fiber tube, which will cause damage to the carbon fiber tube, or lead to incorrect grinding accuracy of the carbon fiber tube, and grinding the larger-diameter carbon fiber tube according to the accuracy requirements of the smaller-diameter carbon fiber tube. Summary of the Invention

[0005] The present invention provides a rotating surface grinding device for cylindrical carbon fiber tubes, which can make the abrasive belt stop rotating in time when a worker misplaces a carbon fiber tube with a larger diameter, so as to reduce the occurrence of damage to the carbon fiber tube and reduce production losses.

[0006] The technical solution is as follows: A rotary surface grinding device for a cylindrical carbon fiber tube, which includes a guiding frame, a grinding bracket, an electric guide rail, a fixing block, a rotary clamping frame, a connecting rotating shaft, a sliding block, a connecting shaft, a connecting bracket, a guiding plate, a lifting frame, a lifting slider, a supporting roller, a grinding sand belt, an anti-torsion damage mechanism and a positioning mechanism. A grinding bracket is fixedly connected to the guiding frame. An electric guide rail is installed at the top of the grinding bracket. A fixing block is fixedly connected inside the guiding frame. A rotary clamping frame is installed on the fixing block. A connecting rotating shaft is rotatably connected inside the fixing block. The connecting rotating shaft is fixedly connected to the rotary clamping frame. A sliding block is slidably connected inside the guiding frame. The sliding block and the fixing block are symmetrically arranged inside the guiding frame. A rotary clamping frame is also rotatably connected to the sliding block. A connecting shaft is slidably connected inside the guiding frame. A lifting frame is slidably connected to the connecting shaft. A supporting roller is installed inside the lifting frame. There are three supporting rollers. The grinding sand belt is sleeved outside the three supporting rollers. A lifting slider is slidably connected inside the lifting frame. The lifting slider is rotatably connected to the topmost supporting roller inside the lifting frame. One end of the connecting shaft close to the fixing block is fixedly connected to a connecting bracket. The connecting bracket is slidably connected to the guiding frame. A guiding plate is fixedly connected to the electric guide rail through an electric slider. The anti-torsion damage mechanism is installed inside the fixing block. The positioning mechanism is installed inside the lifting frame.

[0007] Preferably, the anti-torsion damage mechanism includes a torsion spring, a rotary convex disc, a first bevel gear transmission group, a rotary outer frame, a rotary inner frame, an arc-shaped sliding rod, a connecting spring, a rotating wheel, a transmission shaft, a spline shaft, a sliding shaft sleeve, a second bevel gear transmission group, an adjusting rod, a transmission component and a clamping component. A rotary outer frame is rotatably connected inside the guiding frame. A transmission shaft and a spline shaft are rotatably connected inside the guiding frame. A sliding shaft sleeve is slidably connected to the transmission shaft. The sliding shaft sleeve connects the transmission shaft and the spline shaft together. The rotary outer frame and the spline shaft are connected through the first bevel gear transmission group. A rotary inner frame is fixedly connected to the rotary outer frame. The rotary inner frame and the connecting rotating shaft are connected through a torsion spring. An arc-shaped sliding rod is slidably connected to the rotary inner frame. The arc-shaped sliding rod and the rotary inner frame are connected through a connecting spring. A rotary convex disc is fixedly connected to the connecting rotating shaft. A rotating wheel is rotatably connected to the arc-shaped sliding rod. The transmission shaft and the connecting shaft are connected through the second bevel gear transmission group. An adjusting rod is slidably connected to the grinding bracket. The adjusting rod is clamped outside the sliding shaft sleeve. The transmission component is installed on the connecting shaft and the lifting frame. The transmission component is used to drive the supporting roller to rotate. The clamping component is installed inside the grinding bracket. The clamping component is used to limit the position of the adjusting rod.

[0008] Preferably, the transmission component includes a driving pulley, a transmission belt, a driven pulley, a tensioning pulley and a tensioning spring. A driving pulley is rotatably connected to the outside of the connecting shaft. The lifting frame and the driving pulley are connected through a cylindrical sleeve. A driven pulley is fixedly connected to the rotating shaft of the supporting roller connected to the lifting slider. A tensioning pulley is slidably connected inside the lifting frame. The driving pulley, the driven pulley and the tensioning pulley are jointly sleeved with a transmission belt. The tensioning pulley and the lifting frame are connected through a tensioning spring.

[0009] Preferably, the clamping component includes a wedge-shaped clamping block and a clamping spring. The wedge-shaped clamping block is slidably connected inside the grinding bracket, and the wedge-shaped clamping block and the grinding bracket are connected by the clamping spring.

[0010] Preferably, the positioning mechanism includes an air cylinder, a support spring, a downward pressure piston rod, a cross tube, a lifting push rod, a U-shaped contact block and a connecting plate. The air cylinder is installed inside the lifting frame. The bottom of the lifting slider is fixedly connected with the downward pressure piston rod. The bottom of the downward pressure piston rod is slidably connected inside the air cylinder. A support spring is arranged between the bottom of the downward pressure piston rod and the inner bottom surface of the air cylinder. The cross tube is fixedly connected inside the lifting frame, and the cross tube is communicated with the air cylinder. Two lifting push rods are symmetrically and slidably connected inside the lifting frame. The top of the lifting push rod is slidably connected inside the cross tube. The two lifting push rods are connected by the connecting plate. The bottom of one of the lifting push rods is fixedly connected with the U-shaped contact block. The inner surface of the U-shaped contact block is arc-shaped, and the arc diameter of the inner surface of the U-shaped contact block is larger than the diameter of the carbon fiber tube to be ground.

[0011] Preferably, it further includes a ball. The ball is rotatably connected inside the U-shaped contact block, and the surface of the ball contacts the carbon fiber tube to facilitate the U-shaped contact block to move along the surface of the carbon fiber tube.

[0012] Preferably, it further includes an air extraction component for collecting grinding dust. The air extraction component includes a dust collection frame, a filter plate and a spiral fan blade. The dust collection frame is fixedly connected inside the lifting frame. The filter plate is installed inside the dust collection frame. The spiral fan blade is rotatably connected at the air outlet on the side of the dust collection frame.

[0013] Preferably, it further includes a cooling component for reducing the surface temperature of the grinding sand belt. The cooling component includes a water tank, a water pump, a water spraying pipe and a water collecting plate. The water tank is fixedly connected to the lifting frame. The water pump is installed inside the water tank. The water outlet of the water pump is connected to the water spraying pipe. The water collecting plate is rotatably connected inside the water tank, and the other end of the water collecting plate contacts the surface of the grinding sand belt. The water sprayed by the water spraying pipe can be collected into the water tank by the water collecting plate again as the grinding sand belt rotates.

[0014] Preferably, it further includes a cleaning component for cleaning the surface of the grinding abrasive belt. The cleaning component includes a driving roller, a driving gear, a driven gear, a belt drive group, a collection box, a rotating shaft, a conical missing gear, a driving bevel gear, a swinging plate, a cleaning plate and a receiving plate. A driving roller is rotatably connected inside the dust collection frame. A driving gear is fixedly connected to the driving roller inside the dust collection frame far from the water tank. A driven gear is rotatably connected inside the dust collection frame far from the water tank. A collection box is fixedly connected to the lifting frame. A rotating shaft is rotatably connected outside the collection box. The rotating shaft and the driven gear are connected through the belt drive group. A driving bevel gear is rotatably connected outside the collection box. Two conical missing gears are symmetrically fixedly connected to the rotating shaft with respect to the driving bevel gear. A swinging plate is rotatably connected inside the collection box. The swinging plate is fixedly connected to the rotating shaft of the driving bevel gear. A slotted hole is opened at one end of the swinging plate far from the driving bevel gear. A cleaning plate is slidably connected inside the collection box. The cylindrical rod at the top of the cleaning plate is located in the slotted hole on the swinging plate.

[0015] Preferably, it further includes a support component for supporting the grinding abrasive belt. The support component includes a support roller and a supporting spring. A support roller is slidably connected to the top of the dust collection frame. A supporting spring is provided between the support roller and the dust collection frame.

[0016] Compared with the prior art, the present invention has the following advantages: 1. The present invention integrates the functions of clamping, rotating, grinding and overpressure emergency stop, and can automatically grind the outer rotating surface of the carbon fiber tube by using an intelligent control system, improving the processing efficiency. At the same time, it can avoid the carbon fiber tube from cracking and damage due to excessive pressure, reducing production losses.

[0017] 2. The device connects the power of the rotating clamping frame and the grinding abrasive belt through a sliding bushing. During grinding, under the action of components such as torsion springs, the carbon fiber tube can be effectively protected from damage. And during the descent of the lifting frame, the U-shaped contact block contacts the carbon fiber tube and can play a positioning function. Through the dual protection of the anti-torsion damage mechanism and the positioning mechanism, the probability of damage to the carbon fiber tube during grinding can be effectively reduced, reducing production losses.

[0018] 3. The dust generated during the grinding process can be collected by the dust collection frame. Subsequently, when the dust passes through the filter plate along with the air flow, the filter plate will absorb the dust in the air flow, avoiding the pollution of the production environment by the grinding dust and reducing the harm to the human body during the grinding process.

[0019] 4. During the process of grinding the outer rotating surface of the carbon fiber tube, a large amount of heat will be generated, and the surface temperature of the grinding abrasive belt will rise. During the rotation of the grinding abrasive belt, water is injected into the water spray pipe by a water pump, and the water spray pipe sprays water outward onto the surface of the grinding abrasive belt to cool the grinding abrasive belt. And part of the sprayed water can rotate with the grinding abrasive belt and pass through the water collecting plate, and finally flow back into the water tank along the water collecting plate, realizing the recycling of the water source while cooling.

[0020] 5. During the grinding process, some dust and other debris will remain on the surface of the grinding belt. When the grinding belt passes through the cleaning plate, the cleaning plate slides back and forth along the collection box and cleans the surface of the grinding belt through the soft bristles at the bottom. The swept dust and other debris eventually enters the collection box through the receiving plate to achieve the function of cleaning the residue on the surface of the grinding belt.

[0021] 6. During the grinding process, the transmission roller and the support roller can provide support to the grinding belt from the inside at the same time, which can prevent the belt from deviating during grinding and ensure the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the front side of the present invention.

[0023] Figure 2 It is a schematic structural diagram of the guide frame of the present invention after being cut open.

[0024] Figure 3 It is a schematic diagram of the structure of the fixed block after being cut open.

[0025] Figure 4 It is a schematic diagram of the structure between the rotating inner frame and the rotating outer frame of the present invention.

[0026] Figure 5 This is a schematic diagram of the structure of the polished bracket after being cut open.

[0027] Figure 6 It is a structural schematic diagram of the lifting frame of the present invention.

[0028] Figure 7 It is a structural schematic diagram of the transmission component of the present invention.

[0029] Figure 8 It is a structural schematic diagram of the position of the gas cylinder of the present invention.

[0030] Figure 9 It is a structural schematic diagram of the positioning mechanism of the present invention.

[0031] Figure 10 It is a schematic diagram of the structure inside the dust collection frame of the present invention.

[0032] Figure 11 It is a schematic diagram of the structure inside the water tank of the present invention.

[0033] Figure 12 It is a structural schematic diagram of the collection box of the present invention.

[0034] Reference numerals: 1, guide frame; 101, grinding bracket; 1011, wedge-shaped chuck; 1012, clamping spring; 102, electric guide rail; 103, fixing block; 1031, rotating clamping frame; 1032, connecting rotating shaft; 1033, torsion spring; 1034, rotating convex disk; 104, sliding block; 105, first bevel gear transmission group; 1051, rotating outer frame; 1052, rotating inner frame; 1053, arc-shaped sliding rod; 1054, connecting spring; 1055, rotating wheel; 106, transmission shaft; 1061, spline shaft; 107, sliding shaft sleeve; 108, second bevel gear transmission group; 109, position adjusting rod; 2, connecting shaft; 201, connecting bracket; 202, guide plate; 203, lifting frame; 204, lifting slider; 205, supporting roller; 206, grinding sand belt; 3, driving pulley; 301, transmission belt; 302, driven pulley; 303, tensioning pulley; 304, tensioning spring; 4, air cylinder; 401, supporting spring; 402, downward pressure piston rod; 403, cross tube; 404, lifting push rod; 405, U-shaped contact block; 4051, ball; 406, connecting plate; 5, dust collection box; 501, filter plate; 502, spiral fan blade; 503, transmission roller; 504, driving gear; 505, driven gear; 506, belt transmission group; 6, water tank; 601, water pump; 602, water spraying pipe; 603, water collecting plate; 7, collecting box; 701, rotating shaft; 702, conical missing gear; 703, driving bevel gear; 704, swinging plate; 705, cleaning plate; 706, receiving plate; 8, supporting roller; 801, supporting spring. Detailed implementation mode

[0035] The preferred technical solution of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] Example 1: A rotary surface grinding device for a cylindrical carbon fiber tube, as Figures 1 - 12As shown in the figure, it includes a guide frame 1, a grinding bracket 101, an electric guide rail 102, a fixed block 103, a rotating clamping frame 1031, a connecting rotating shaft 1032, a sliding block 104, a connecting shaft 2, a connecting bracket 201, a guide plate 202, a lifting frame 203, a lifting slider 204, a supporting roller 205, a grinding abrasive belt 206, an anti-torsion damage mechanism and a positioning mechanism. The grinding bracket 101 is fixedly connected to the guide frame 1. The electric guide rail 102 is installed at the top of the grinding bracket 101. The fixed block 103 is fixedly connected inside the guide frame 1. The rotating clamping frame 1031 is installed on the fixed block 103. The connecting rotating shaft 1032 is rotatably connected inside the fixed block 103. The connecting rotating shaft 1032 is fixedly connected to the rotating clamping frame 1031. The sliding block 104 is slidably connected inside the guide frame 1. The sliding block 104 and the fixed block 103 are symmetrically arranged inside the guide frame 1. The rotating clamping frame 1031 is also rotatably connected to the sliding block 104. The connecting shaft 2 is slidably connected inside the guide frame 1. The lifting frame 203 is slidably connected to the connecting shaft 2. The supporting roller 205 is installed inside the lifting frame 203. There are three supporting rollers 205, and the three supporting rollers 205 are respectively located at three corner positions inside the lifting frame 203. The three supporting rollers 205 form a triangle. The grinding abrasive belt 206 is sleeved outside the three supporting rollers 205. The lifting slider 204 is slidably connected inside the lifting frame 203. The lifting slider 204 is rotatably connected to the topmost supporting roller 205 inside the lifting frame 203. One end of the connecting shaft 2 close to the fixed block 103 is fixedly connected to the connecting bracket 201. The connecting bracket 201 is slidably connected to the guide frame 1. The guide plate 202 is fixedly connected to the electric guide rail 102 through an electric slider. Under the action of the electric slider, the guide plate 202 can slide along the electric guide rail 102. The anti-torsion damage mechanism is installed inside the fixed block 103. The positioning mechanism is installed inside the lifting frame 203.

[0037] Before polishing, push the sliding block 104 away from the fixed block 103. Then, push one end of the carbon fiber tube to be polished into the rotary clamping frame 1031 on the fixed block 103 and clamp it tightly. Next, push the sliding block 104 towards the fixed block 103 so that the rotary clamping frame 1031 on the sliding block 104 sleeves over the other end of the carbon fiber tube. At this time, both ends of the carbon fiber tube are clamped. Then, control the lifting frame 203 and the devices thereon to slide downward along the guide plate 202. When the polishing sand belt 206 contacts the surface of the carbon fiber tube and wraps a certain arc at its top, stop the downward movement of the lifting frame 203, and during the subsequent polishing process, the height of the lifting frame 203 will not change. At this time, the external power drives the rotary clamping frame 1031 to rotate through the anti-torsion damage mechanism. The anti-torsion damage mechanism can also drive the idler roller 205 to rotate through the connecting shaft 2. The polishing sand belt 206 wound around the idler roller 205 rotates accordingly, and the rotation direction of the polishing sand belt 206 is opposite to that of the carbon fiber tube. At this time, the polishing sand belt 206 starts to polish the carbon fiber tube. Since carbon fiber tubes with similar diameters are difficult to distinguish with the naked eye, when placing the carbon fiber tube, if a carbon fiber tube with a slightly larger diameter is misplaced, when the lifting frame 203 descends by the same height, the polishing sand belt 206 will exert a greater pressure on the carbon fiber tube. At this time, the carbon fiber tube needs to withstand a greater force to be driven to rotate, and the force that the carbon fiber tube can withstand is limited. When the pressure from the polishing sand belt 206 is too large, the carbon fiber tube will be damaged. When the pressure between the polishing sand belt 206 and the carbon fiber tube is too large, the anti-torsion damage mechanism will cut off the connection between the external power and the connecting shaft 2, so that the polishing sand belt 206 no longer rotates in the reverse direction. At this time, the carbon fiber tube will not be subjected to the thrust from the polishing sand belt 206 that is opposite to its own rotation direction, which can avoid damage to the carbon fiber tube. And in this case, the device will have obvious changes, and the staff can quickly detect the abnormality and stop the machine for maintenance in time to reduce losses. During the downward movement of the lifting frame 203, the positioning mechanism also descends. The positioning mechanism can adjust the pressure exerted by the polishing sand belt 206 on the carbon fiber tube. With double guarantees, it can effectively avoid damage to the carbon fiber tube and reduce production losses.

[0038] Embodiment 2: On the basis of Embodiment 1, as Figures 2 - 5 and Figure 7As shown in the figure, the anti-torsion and anti-damage mechanism includes a torsion spring 1033, a rotating convex disc 1034, a first bevel gear transmission group 105, a rotating outer frame 1051, a rotating inner frame 1052, an arc-shaped sliding rod 1053, a connecting spring 1054, a rotating wheel 1055, a transmission shaft 106, a spline shaft 1061, a sliding shaft sleeve 107, a second bevel gear transmission group 108, an adjusting rod 109, a transmission component and a clamping component. A rotating outer frame 1051 is rotatably connected inside the guide frame 1. A transmission shaft 106 and a spline shaft 1061 are rotatably connected inside the guide frame 1. A sliding shaft sleeve 107 is slidably connected to the transmission shaft 106. The sliding shaft sleeve 107 connects the transmission shaft 106 and the spline shaft 1061 together. The rotating outer frame 1051 is connected to the spline shaft 1061 through the first bevel gear transmission group 105. A rotating inner frame 1052 is fixedly connected to the rotating outer frame 1051. The rotating inner frame 1052 is connected to the connecting rotating shaft 1032 through the torsion spring 1033. An arc-shaped sliding rod 1053 is slidably connected to the rotating inner frame 1052. There are two arc-shaped sliding rods 1053. The two ends of the two arc-shaped sliding rods 1053 are in contact with each other to form a complete ring. The arc-shaped sliding rod 1053 is connected to the rotating inner frame 1052 through the connecting spring 1054. One end of the connecting spring 1054 is fixed on the arc-shaped sliding rod 1053, and the other end is fixedly connected to the rotating inner frame 1052. A rotating convex disc 1034 is fixedly connected to the connecting rotating shaft 1032. The rotating convex disc 1034 is located between the rotating inner frame 1052 and the rotating outer frame 1051. A rotating wheel 1055 is rotatably connected to the arc-shaped sliding rod 1053. The rotating wheel 1055 is in contact with the outer wall of the rotating convex disc 1034. The transmission shaft 106 is connected to the connecting shaft 2 through the second bevel gear transmission group 108. An adjusting rod 109 is slidably connected to the grinding support 101. The adjusting rod 109 is clamped outside the sliding shaft sleeve 107. The transmission component is installed on the connecting shaft 2 and the lifting frame 203. The transmission component is used to drive the rotating of the roller 205. The clamping component is installed inside the grinding support 101. The clamping component is used to limit the position of the adjusting rod 109.

[0039] During grinding, the rotating clamp frame 1031 can only rotate in the forward direction, and the external power drives the spline shaft 1061 to rotate through the rotating outer frame 1051 and the first bevel gear transmission group 105, and the spline shaft 1061 drives the transmission shaft 106 to rotate through the sliding sleeve 107, and the transmission shaft 106 drives the connecting shaft 2 to rotate through the second bevel gear transmission group 108, and the connecting shaft 2 drives the roller 205 and the grinding belt 206 to rotate through the transmission assembly. When the grinding belt 206 rotates, it can also apply a reverse force to the carbon fiber tube. At the same time, the external power drives the rotating inner frame 1052 to rotate through the rotating outer frame 1051, and the arc slide bar 1053, the connecting spring 1054 and the rotating wheel 1055 rotate accordingly, and the rotating inner frame 105 The torsion spring 1033 applies a positive force to the connecting shaft 1032 and the rotating clamp frame 1031. The carbon fiber tube is subjected to a reverse force which acts on the rotating clamp frame 1031 and the connecting shaft 1032 at the same time. Only when the positive force is greater than the reverse force, the carbon fiber tube will be driven to rotate positively. Under normal circumstances, the torsion spring 1033 can drive the carbon fiber tube to rotate positively through the connecting shaft 1032 and the rotating clamp frame 1031 after a certain deformation. At this time, the positive force and the reverse force on the carbon fiber tube are within its bearing range. The rotating convex disc 1034 rotates with the connecting shaft 1032, and the rotating wheel 1055 will not move to the protruding part along the outside of the rotating convex disc 1034. The arc-shaped slide bar 1053 will not be pushed outward. When the carbon fiber tube is subjected to excessive pressure from the grinding belt 206, the reverse force exerted on the carbon fiber tube by the grinding belt 206 when rotating will also increase. The connecting shaft 1032 needs the torsion spring 1033 to exert a greater force to rotate. When the reverse force exerted by the grinding belt 206 on the carbon fiber tube exceeds the maximum value for normal grinding process, the rotating wheel 1055 will rotate with the rotating inner frame 1052 and the rotating outer frame 1051 and move along the outer surface of the rotating convex disc 1034 to the protruding part. At this time, the rotating wheel 1055 can push the arc-shaped slide bar 1053 outward, and the arc-shaped slide bar 1053 can contact the adjustment rod 109 and push it along The grinding bracket 101 slides upward, and the adjusting rod 109 can drive the sliding sleeve 107 to slide upward along the transmission shaft 106 and disengage from the spline shaft 1061. The positioning assembly can limit the adjusting rod 109 and prevent it from automatically sliding downward along the grinding bracket 101 to reset, and the external power cannot drive the transmission shaft 106 to rotate through the spline shaft 1061. At this time, the connecting shaft 2, the transmission assembly and the roller 205 stop rotating at the same time, and the grinding belt 206 also stops rotating. The reverse force from the grinding belt 206 on the carbon fiber tube disappears. At this time, the carbon fiber tube is only subjected to the pressure from the grinding belt 206, which can prevent the grinding belt 206 from being continuously subjected to excessive reverse force and being damaged.

[0040] like Figure 7As shown in the figure, the transmission assembly includes a driving pulley 3, a transmission belt 301, a driven pulley 302, a tensioning pulley 303 and a tensioning spring 304. The driving pulley 3 is rotatably connected to the outside of the connecting shaft 2. The lifting frame 203 and the driving pulley 3 are connected by a cylindrical sleeve, so that the driving pulley 3 can slide synchronously with the lifting frame 203. A driven pulley 302 is fixedly connected to the rotating shaft of the roller 205 connected to the lifting slider 204. The tensioning pulley 303 is slidably connected in the lifting frame 203. The driving pulley 3, the driven pulley 302 and the tensioning pulley 303 are jointly sleeved with a transmission belt 301. The tensioning pulley 303 and the lifting frame 203 are connected by a tensioning spring 304. One end of the tensioning spring 304 is fixed on the tensioning pulley 303, and the other end is fixed on the lifting frame 203.

[0041] When the connecting shaft 2 rotates, the driving pulley 3 can drive the driven pulley 302 and the roller 205 to rotate through the transmission belt 301. When the grinding sand belt 206 contacts the carbon fiber tube and produces a certain deformation, the lifting slider 204 and the roller 205 inside it will slide downward along the lifting frame 203. At this time, the transmission belt 301 will push the tensioning pulley 303 to slide into the lifting frame 203 and compress the tensioning spring 304. After grinding, the grinding sand belt 206 is separated from the carbon fiber tube, and the lifting slider 204 and the roller 205 at the top of the lifting frame 203 rise and reset. At this time, the tensioning spring 304 pushes the tensioning pulley 303 to slide out of the lifting frame 203, so that the transmission belt 301 is always kept in a tensioned state to drive the roller 205 to rotate.

[0042] As Figure 5 shown in the figure, the positioning component includes a wedge-shaped block 1011 and a positioning spring 1012. The wedge-shaped block 1011 is slidably connected in the grinding bracket 101. The wedge-shaped block 1011 and the grinding bracket 101 are connected by a positioning spring 1012. One end of the positioning spring 1012 is fixedly connected to the wedge-shaped block 1011, and the other end is fixedly connected to the grinding bracket 101.

[0043] When the adjusting rod 109 slides upward along the grinding bracket 101, it will contact the wedge-shaped block 1011. At this time, the side of the wedge-shaped block 1011 facing the adjusting rod 109 is an inclined surface. The adjusting rod 109 will push the wedge-shaped block 1011 to slide into the grinding bracket 101 and compress the positioning spring 1012. When the adjusting rod 109 is separated from the wedge-shaped block 1011, the positioning spring 1012 will push the wedge-shaped block 1011 outwards. At this time, the adjusting rod 109 is located outside the wedge-shaped block 1011, and the wedge-shaped block 1011 can provide support for the adjusting rod 109 from the bottom, so that the adjusting rod 109 cannot automatically slide downward along the grinding bracket 101 to reset. When it is necessary to make the adjusting rod 109 descend and reset, manually push the wedge-shaped block 1011 to slide into the grinding bracket 101, and the adjusting rod 109 can slide along the grinding bracket 101 to reset.

[0044] As Figure 8 and Figure 9 shown, the positioning mechanism includes a cylinder 4, a support spring 401, a downward pressure piston rod 402, a cross tube 403, a lifting push rod 404, a U-shaped contact block 405 and a connecting plate 406. The cylinder 4 is installed in the lifting frame 203, and the cylinder 4 is located below the lifting slider 204. The bottom of the lifting slider 204 is fixedly connected with the downward pressure piston rod 402. The bottom of the downward pressure piston rod 402 is slidably connected in the cylinder 4. A support spring 401 is arranged between the downward pressure piston rod 402 and the inner bottom surface of the cylinder 4. One end of the support spring 401 is fixed on the inner bottom surface of the cylinder 4, and the other end is fixed on the downward pressure piston rod 402. The cross tube 403 is fixedly connected in the lifting frame 203, and the cross tube 403 is communicated with the cylinder 4. Two lifting push rods 404 are symmetrically and slidably connected in the lifting frame 203. The top of the lifting push rod 404 is slidably connected in the cross tube 403. The two lifting push rods 404 are connected by a connecting plate 406. The bottom of one of the lifting push rods 404 is fixedly connected with the U-shaped contact block 405. The inner surface of the U-shaped contact block 405 is arc-shaped, and the diameter of the arc of the inner surface of the U-shaped contact block 405 is larger than the diameter of the carbon fiber tube to be polished.

[0045] As Figure 9 shown, it further includes a ball 4051. The ball 4051 is rotatably connected in the U-shaped contact block 405, and the surface of the ball 4051 contacts the carbon fiber tube to facilitate the movement of the U-shaped contact block 405 along the surface of the carbon fiber tube.

[0046] During the process of the lifting frame 203 descending, the grinding sand belt 206 will come into contact with the carbon fiber tube. When the grinding sand belt 206 adheres to the carbon fiber tube and undergoes a certain deformation, the idler roller 205 at the top inside the lifting frame 203 descends, and the lifting slider 204 will slide downward along the lifting frame 203 accordingly. The downward pressure piston rod 402 is pushed and slides along the air cylinder 4, and the support spring 401 is compressed. At this time, the support spring 401 provides an upward thrust to the lifting slider 204 through the downward pressure piston rod 402. When the grinding sand belt 206 contacts the carbon fiber tube, the U-shaped contact block 405 also contacts the carbon fiber tube. As the lifting frame 203 continues to descend, the U-shaped contact block 405 is restricted by the carbon fiber tube. At this time, the lifting push rod 404 will slide into the cross tube 403, and the space inside the air cylinder 4 and the cross tube 403 is squeezed. The downward pressure piston and the lifting slider 204 receive a greater upward thrust, and the resistance encountered during the descent of the lifting frame 203 becomes larger. When the resistance encountered during the descent of the lifting frame 203 reaches a predetermined value, the descent of the lifting frame 203 is stopped. At this time, the pressure exerted on the carbon fiber tube by the grinding sand belt 206 is within the normal range, and the carbon fiber tube can be ground. The height of the lifting frame 203 is restricted by the positioning mechanism to prevent the grinding sand belt 206 from exerting too much pressure on the carbon fiber tube due to excessive descent of the lifting frame 203, and it can also reduce the occurrence of damage to the carbon fiber tube. During the grinding process, the U-shaped contact block 405 contacts the carbon fiber tube through the ball 4051, facilitating the movement of the U-shaped contact block 405 along the surface of the carbon fiber tube.

[0047] Embodiment 3: On the basis of Embodiment 2, as Figure 10 shown, it further includes an air extraction assembly for collecting grinding dust. The air extraction assembly includes a dust collection frame 5, a filter plate 501, and a spiral fan blade 502. The dust collection frame 5 is fixedly connected inside the lifting frame 203. The bottom of the dust collection frame 5 is provided with an air inlet. A filter plate 501 is installed inside the dust collection frame 5. The filter plate 501 can filter the grinding dust in the air. The side of the dust collection frame 5 is provided with an air outlet. A spiral fan blade 502 is rotatably connected at the air outlet on the side of the dust collection frame 5. When the spiral fan blade 502 rotates, it can extract the air at the contact position between the grinding sand belt 206 and the carbon fiber tube through the air inlet at the bottom of the dust collection frame 5 to suck the dust generated during grinding.

[0048] Dust is generated during the grinding process. At this time, the spiral fan blade 502 is started. Under the action of the spiral fan blade 502, the dust generated during grinding will enter the dust collection frame 5 along with the air flow. When the air flow passes through the filter plate 501, the filter plate 501 will filter out the dust in the air flow. Finally, the dust filtered by the filter plate 501 is discharged outward from the side outlet of the dust collection frame 5, realizing the function of collecting grinding dust.

[0049] As Figure 10 and Figure 11As shown, it further includes a temperature reduction component for reducing the surface temperature of the abrasive belt 206. The temperature reduction component includes a water tank 6, a water pump 601, a water spray pipe 602, and a water collection plate 603. The water tank 6 is fixedly connected to the lifting frame 203. The water pump 601 is installed in the water tank 6. The water inlet of the water pump 601 is located in the water tank 6, and the water outlet of the water pump 601 is connected to the water spray pipe 602. The water pump 601 can spray the water in the water tank 6 outward through the water spray pipe 602. The water collection plate 603 is rotatably connected in the water tank 6, and the other end of the water collection plate 603 contacts the surface of the abrasive belt 206. The water sprayed by the water spray pipe 602 can be collected by the water collection plate 603 and re-flowed into the water tank 6 as the abrasive belt 206 rotates, so as to avoid unnecessary waste.

[0050] During the rotation of the abrasive belt 206, the water pump 601 injects the cold water in the water tank 6 into the water spray pipe 602, and finally the water spray pipe 602 sprays the water on the surface of the abrasive belt 206 to reduce the surface temperature of the abrasive belt 206. When the abrasive belt 206 passes through the water collection plate 603, the water droplets converging on the surface of the abrasive belt 206 will re-flow into the water tank 6 through the water collection plate 603, achieving a certain recycling effect while cooling and avoiding waste.

[0051] As Figure 10 and Figure 12As shown, it further includes a cleaning component for cleaning the surface of the grinding sand belt 206. The cleaning component includes a driving roller 503, a driving gear 504, a driven gear 505, a belt drive group 506, a collection box 7, a rotating shaft 701, a conical missing gear 702, a driving bevel gear 703, a swing plate 704, a cleaning plate 705 and a receiving plate 706. A driving roller 503 is rotatably connected inside the dust collection frame 5. The driving roller 503 can provide support for the grinding sand belt 206 from the inside. A driving gear 504 is fixedly connected to the driving roller 503 inside the dust collection frame 5 away from the water tank 6. A driven gear 505 is rotatably connected inside the dust collection frame 5 away from the water tank 6. A collection box 7 is fixedly connected to the lifting frame 203. A rotating shaft 701 is rotatably connected outside the collection box 7. The rotating shaft 701 is connected to the driven gear 505 through the belt drive group 506. A driving bevel gear 703 is rotatably connected outside the collection box 7. Two conical missing gears 702 are fixedly connected symmetrically about the driving bevel gear 703 on the rotating shaft 701. The two conical missing gears 702 are alternately engaged with the driving bevel gear 703. A swing plate 704 is rotatably connected inside the collection box 7. The swing plate 704 is fixedly connected to the rotating shaft of the driving bevel gear 703. A slotted hole is formed at one end of the swing plate 704 away from the driving bevel gear 703. A cleaning plate 705 is slidably connected inside the collection box 7. Soft bristles are installed at the bottom of the cleaning plate 705. The soft bristles are in contact with the outer surface of the grinding sand belt 206. A cylindrical rod is fixedly connected to the top of the cleaning plate 705. The cylindrical rod at the top of the cleaning plate 705 is located in the slotted hole on the swing plate 704. When the driving bevel gear 703 rotates, it can drive the cleaning plate 705 to slide inside the collection box 7 through the swing plate 704.

[0052] When the grinding sand belt 206 rotates, it will drive the driving roller 503 to rotate. The driving roller 503 drives the driven gear 505 to rotate through the driving gear 504. The driven gear 505 drives the rotating shaft 701 to rotate through the belt drive group 506. When the rotating shaft 701 rotates, it drives the two conical missing gears 702 to rotate. And because the missing tooth parts of the two conical missing gears 702 complement each other, the two conical missing gears 702 will drive the driving bevel gear 703 to rotate continuously and reciprocally during the rotation with the rotating shaft 701, thereby driving the swing plate 704 to swing reciprocally. During the reciprocal swing of the swing plate 704, it drives the cleaning plate 705 to slide reciprocally inside the collection box 7. The soft bristles at the bottom of the cleaning plate 705 will clean the surface of the grinding sand belt 206. The dust and debris swept from the surface of the grinding sand belt 206 will enter the collection box 7 through the receiving plate 706.

[0053] As Figure 10As shown, it further includes a support assembly for supporting the grinding abrasive belt 206. The support assembly includes a support roller 8 and a lifting spring 801. The support roller 8 is slidably connected to the top of the dust collection box 5. A lifting spring 801 is provided between the support roller 8 and the dust collection box 5. One end of the lifting spring 801 is fixed to the support roller 8, and the other end is fixed to the dust collection box 5.

[0054] After the grinding abrasive belt 206 contacts the carbon fiber tube, when the lifting frame 203 continues to descend, it will drive the lifting slider 204 to descend through the grinding abrasive belt 206, and the supporting roller 205 at the inner top of the lifting frame 203 will descend accordingly. At this time, the grinding abrasive belt 206 is no longer triangular. To prevent the grinding abrasive belt 206 from contacting the corners on the dust collection box 5, a support roller 8 is installed on the dust collection box 5. At this time, the support roller 8 will provide support for the grinding abrasive belt 206 from the inside. And under the action of the lifting spring 801, as the height of the downward sliding of the lifting slider 204 is different, the degree of compression of the lifting spring 801 is different, which can prevent the support roller 8 from being damaged.

[0055] The above embodiments are provided for those skilled in the art to implement or use the present invention. Those skilled in the art can make modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited by the above embodiments, but should be the maximum scope that conforms to the innovative features mentioned in the claims.

Claims

1. A rotary surface grinding device for a cylindrical carbon fiber tube, characterized in that, It includes a guiding frame (1), a grinding bracket (101), an electric guide rail (102), a fixing block (103), a rotating clamping frame (1031), a connecting rotating shaft (1032), a sliding block (104), a connecting shaft (2), a connecting bracket (201), a guiding plate (202), a lifting frame (203), a lifting sliding block (204), a supporting roller (205), a grinding abrasive belt (206), an anti-torsion damage mechanism and a positioning mechanism. A grinding bracket (101) is fixedly connected to the guiding frame (1). An electric guide rail (102) is installed at the top of the grinding bracket (101). A fixing block (103) is fixedly connected inside the guiding frame (1). A rotating clamping frame (1031) is installed on the fixing block (103). A connecting rotating shaft (1032) is rotatably connected to the fixing block (103). The connecting rotating shaft (1032) is fixedly connected to the rotating clamping frame (1031). A sliding block (104) is slidably connected inside the guiding frame (1). The sliding block (104) and the fixing block (103) are symmetrically arranged inside the guiding frame (1). A rotating clamping frame (1031) is also rotatably connected to the sliding block (104). A connecting shaft (2) is slidably connected inside the guiding frame (1). A lifting frame (203) is slidably connected to the connecting shaft (2). A supporting roller (205) is installed inside the lifting frame (203). There are three supporting rollers (205). The grinding abrasive belt (206) is sleeved outside the three supporting rollers (205). A lifting sliding block (204) is slidably connected inside the lifting frame (203). The lifting sliding block (204) is rotatably connected to the topmost supporting roller (205) inside the lifting frame (203). One end of the connecting shaft (2) close to the fixing block (103) is fixedly connected to a connecting bracket (201). The connecting bracket (201) is slidably connected to the guiding frame (1). A guiding plate (202) is fixedly connected to the electric guide rail (102) through an electric sliding block. The anti-torsion damage mechanism is installed inside the fixing block (103). The positioning mechanism is installed inside the lifting frame (203).

2. The rotary surface grinding device for a cylindrical carbon fiber tube according to claim 1, wherein The anti-torsion and anti-damage mechanism includes a torsion spring (1033), a rotating convex disc (1034), a first bevel gear transmission group (105), a rotating outer frame (1051), a rotating inner frame (1052), an arc-shaped sliding rod (1053), a connecting spring (1054), a rotating wheel (1055), a transmission shaft (106), a spline shaft (1061), a sliding shaft sleeve (107), a second bevel gear transmission group (108), an adjusting rod (109), a transmission component and a clamping component. A rotating outer frame (1051) is rotatably connected inside a guide frame (1), a transmission shaft (106) and a spline shaft (1061) are rotatably connected inside the guide frame (1). A sliding shaft sleeve (107) is slidably connected to the transmission shaft (106), and the sliding shaft sleeve (107) connects the transmission shaft (106) and the spline shaft (1061) together. The rotating outer frame (1051) is connected to the spline shaft (1061) through the first bevel gear transmission group (105). A rotating inner frame (1052) is fixedly connected to the rotating outer frame (1051). The rotating inner frame (1052) is connected to a connecting rotating shaft (1032) through a torsion spring (1033). An arc-shaped sliding rod (1053) is slidably connected to the rotating inner frame (1052), and the arc-shaped sliding rod (1053) is connected to the rotating inner frame (1052) through a connecting spring (1054). A rotating convex disc (1034) is fixedly connected to the connecting rotating shaft (1032). A rotating wheel (1055) is rotatably connected to the arc-shaped sliding rod (1053). The transmission shaft (106) is connected to a connecting shaft (2) through the second bevel gear transmission group (108). An adjusting rod (109) is slidably connected to a grinding support (101). The adjusting rod (109) is clamped outside the sliding shaft sleeve (107). The transmission component is installed on the connecting shaft (2) and a lifting frame (203), and the transmission component is used to drive a roller (205) to rotate. The clamping component is installed inside the grinding support (101), and the clamping component is used to limit the position of the adjusting rod (109).

3. A rotary surface grinding device for a cylindrical carbon fiber tube according to claim 2, characterized in that, The transmission component includes a driving pulley (3), a transmission belt (301), a driven pulley (302), a tensioning pulley (303) and a tensioning spring (304). A driving pulley (3) is rotatably connected to the outside of the connecting shaft (2). The lifting frame (203) and the driving pulley (3) are connected through a cylindrical sleeve. A driven pulley (302) is fixedly connected to the rotating shaft of the roller (205) connected to a lifting slider (204). A tensioning pulley (303) is slidably connected inside the lifting frame (203). The driving pulley (3), the driven pulley (302) and the tensioning pulley (303) are jointly sleeved with a transmission belt (301). The tensioning pulley (303) is connected to the lifting frame (203) through a tensioning spring (304).

4. The rotary surface grinding device for a cylindrical carbon fiber tube according to claim 2, wherein, The clamping component includes a wedge-shaped clamping block (1011) and a clamping spring (1012). A wedge-shaped clamping block (1011) is slidably connected inside the grinding support (101). The wedge-shaped clamping block (1011) is connected to the grinding support (101) through a clamping spring (1012).

5. A rotary surface grinding device for a cylindrical carbon fiber tube according to claim 1, characterized in that, The positioning mechanism includes a cylinder (4), a support spring (401), a downward pressure piston rod (402), a cross tube (403), a lifting push rod (404), a U-shaped contact block (405) and a connecting plate (406). The cylinder (4) is installed in the lifting frame (203). The bottom of the lifting slider (204) is fixedly connected with the downward pressure piston rod (402). The bottom of the downward pressure piston rod (402) is slidably connected in the cylinder (4). A support spring (401) is arranged between the downward pressure piston rod (402) and the inner bottom surface of the cylinder (4). The cross tube (403) is fixedly connected in the lifting frame (203). The cross tube (403) is communicated with the cylinder (4). Two lifting push rods (404) are symmetrically and slidably connected in the lifting frame (203). The top of the lifting push rod (404) is slidably connected in the cross tube (403). The two lifting push rods (404) are connected by the connecting plate (406). The bottom of one of the lifting push rods (404) is fixedly connected with the U-shaped contact block (405). The inner surface of the U-shaped contact block (405) is arc-shaped, and the diameter of the arc of the inner surface of the U-shaped contact block (405) is larger than the diameter of the carbon fiber tube to be polished.

6. A rotary surface grinding device for a cylindrical carbon fiber tube as described in claim 5, characterized in that, It further includes balls (4051). The balls (4051) are rotatably connected in the U-shaped contact block (405). The surface of the balls (4051) contacts with the carbon fiber tube, so as to facilitate the movement of the U-shaped contact block (405) along the surface of the carbon fiber tube.

7. A rotary surface grinding device for a cylindrical carbon fiber tube according to claim 1, characterized in that, It further includes an air extraction assembly for collecting polishing dust. The air extraction assembly includes a dust collection frame (5), a filter plate (501) and a spiral fan blade (502). The dust collection frame (5) is fixedly connected in the lifting frame (203). The filter plate (501) is installed in the dust collection frame (5). The spiral fan blade (502) is rotatably connected at the air outlet on the side of the dust collection frame (5).

8. A rotary surface grinding device for a cylindrical carbon fiber tube as described in claim 1, characterized in that, It further includes a temperature reduction assembly for reducing the surface temperature of the polishing sand belt (206). The temperature reduction assembly includes a water tank (6), a water pump (601), a water spray pipe (602) and a water collection plate (603). The water tank (6) is fixedly connected to the lifting frame (203). The water pump (601) is installed in the water tank (6). The water outlet of the water pump (601) is connected to the water spray pipe (602). The water collection plate (603) is rotatably connected in the water tank (6). The other end of the water collection plate (603) contacts with the surface of the polishing sand belt (206). The water sprayed by the water spray pipe (602) can be collected into the water tank (6) by the water collection plate (603) again as the polishing sand belt (206) rotates.

9. A rotary surface grinding device for a cylindrical carbon fiber tube as described in claim 8, characterized in that, It further includes a cleaning component for cleaning the surface of the grinding sand belt (206). The cleaning component includes a driving roller (503), a driving gear (504), a transmission gear (505), a belt transmission group (506), a collection box (7), a rotating shaft (701), a conical missing gear (702), a transmission bevel gear (703), a swing plate (704), a cleaning plate (705) and a receiving plate (706). A driving roller (503) is rotatably connected inside the dust collection frame (5). A driving gear (504) is fixedly connected to the driving roller (503) inside the dust collection frame (5) away from the water tank (6). A transmission gear (505) is rotatably connected inside the dust collection frame (5) away from the water tank (6). A collection box (7) is fixedly connected to the lifting frame (203). A rotating shaft (701) is rotatably connected outside the collection box (7). The rotating shaft (701) is connected to the transmission gear (505) through the belt transmission group (506). A transmission bevel gear (703) is rotatably connected outside the collection box (7). Two conical missing gears (702) are symmetrically and fixedly connected to the rotating shaft (701) with respect to the transmission bevel gear (703). A swing plate (704) is rotatably connected inside the collection box (7). The swing plate (704) is fixedly connected to the rotating shaft of the transmission bevel gear (703). A slotted hole is formed at one end of the swing plate (704) away from the transmission bevel gear (703). A cleaning plate (705) is slidably connected inside the collection box (7). The cylindrical rod at the top of the cleaning plate (705) is located in the slotted hole on the swing plate (704).

10. A rotary surface grinding device for a cylindrical carbon fiber tube according to claim 7, characterized in that It further includes a support component for supporting the grinding sand belt (206). The support component includes a support roller (8) and a supporting spring (801). A support roller (8) is slidably connected to the top of the dust collection frame (5). A supporting spring (801) is provided between the support roller (8) and the dust collection frame (5).

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