Polishing device for traffic sign board production

Abstract

The invention discloses a polishing device for traffic sign board production, and relates to the technical field of polishing devices, the polishing device comprises a base for supporting a support, a combined support rod arranged on the top surface of the support, a support wheel, an abrasive belt and a variable speed motor, and the top surface of the support is provided with a tensioning assembly for automatic tensioning adjustment of the abrasive belt. A plurality of sets of pressing cylinders are arranged on the inner side of the abrasive belt, first tensioning plates and second tensioning plates in the pressing cylinders are in linkage with supporting rods for supporting the abrasive belt through change gears, first annular toothed belts, first gears, lower linkage gears and toothed rings, so that the overall diameter of the pressing cylinders is changed, and by combining a steering gear, a second annular toothed belt, a second gear and an upper linkage gear, the overall diameter of the abrasive belt is changed. The position of the first tensioning plate and the position of the second tensioning plate are switched, so that the pressure of the pressing cylinder on the abrasive belt correspondingly changes, the abrasive belt changes from rough grinding to accurate grinding and then from accurate grinding to super-accurate grinding, and it is ensured that the outer wall of the abrasive belt is tightly attached to grinding parts of workpieces such as traffic signs in different grinding time periods.

Description

Technical Field

[0001] The present invention relates to the field of grinding devices, and particularly to a grinding device for the production of traffic signs. Background Art

[0002] According to the size and shape requirements of traffic signs, a cutting device (such as a laser cutting machine, a plasma cutting machine, a shearing machine, etc.) is used to cut the sheet material to obtain the required blank parts, and then a grinding device is used to grind and polish the excess material at the cutting part of the sheet material. The existing sand belt grinding is a common processing technology used to remove the excess material of the workpiece and grind and polish the surface of the workpiece. The sand belt is made of abrasive particles attached to the base material, and contacts the grinding part of the workpiece such as the traffic sign through high-speed rotation to generate friction to remove the excess material at the grinding part of the workpiece such as the traffic sign. The sand belt is mainly controlled by multiple groups of support wheels and tensioning components.

[0003] At present, the part of the sand belt located between two adjacent groups of support wheels is in a state without external device support, and it is only kept in a straight state by the tensioning component. After long-term grinding, the grinding part of the sand belt will become thinner due to excessive wear. When the thinner part of the sand belt is transmitted to the grinding position between two adjacent groups of support wheels, the contact between the thinner part of the sand belt and the grinding position of the workpiece is insufficient. In addition, after the workpiece such as the traffic sign is ground for a period of time, the grinding part of the workpiece becomes thinner due to the removal of the excess material, so that the distance between the grinding part of the workpiece and the sand belt gradually increases, resulting in insufficient contact between the sand belt and the grinding position of the workpiece, making the overall grinding of the workpiece such as the traffic sign insufficient, and further affecting the subsequent grinding effect. In view of the above problems, we propose a grinding device for the production of traffic signs. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcoming of poor grinding accuracy of the existing sand belt grinding equipment, and to propose a grinding device for the production of traffic signs.

[0005] In order to solve the problems existing in the prior art, the present invention adopts the following technical solutions: A grinding device for the production of traffic signs, comprising a base for supporting the support, a combined support rod arranged on the top surface of the support for grinding the traffic sign, a support wheel, a sand belt and a variable-speed motor. A variation mechanism is arranged on the top surface of the support, and the variation mechanism includes: A hollow box, which is fixedly arranged on the top surface of the support. A plurality of pressing cylinders that abut against the inner side of the sand belt are arranged inside the hollow box, and a first pressing plate and a second pressing plate for changing the diameter of the pressing cylinder are arranged inside the pressing cylinder; The control screw, the threaded seat, the first support plate and the second support plate are combined and arranged inside the pressing cylinder, and one end of the first support plate and the second support plate are rotatably connected to the inner wall of the first pressing plate and the second pressing plate respectively; A variable gear is arranged on the outer wall of the control screw, and the internal transmission of the hollow box is provided with a first annular toothed belt that meshes with multiple sets of variable gears at the same time, and the internal rotation of the hollow box is provided with a shaft for supporting the first annular toothed belt; The linkage assembly comprises a first gear fixedly connected to one end of the shaft rod, a gear ring fixedly connected to the outer wall of the support rod, and a lower linkage gear meshed between the first gear and the gear ring.

[0006] Preferably, a connecting box for supporting the speed-changing motor is fixedly connected to the side of the support, one end of the shaft rod fixedly provided with the first gear and one end of the support rod fixedly provided with the gear ring are both located inside the connecting box, one end of the support rod is fixedly connected to the speed-changing motor, and the inner wall of the connecting box is rotatably provided with a mounting rod for supporting the lower linkage gear.

[0007] Preferably, a bracket for supporting a pressing cylinder is fixedly arranged inside the hollow box, a steering assembly is arranged on the bottom surface of the pressing cylinder, the steering assembly comprises a steering gear fixedly arranged on the bottom surface of the pressing cylinder, a second annular toothed belt which is transmission-arranged inside the hollow box and meshed with the outer walls of multiple groups of steering gears, and a hollow shaft sleeve which is rotatably arranged on the inner wall of the hollow box to support the second annular toothed belt, and the hollow shaft sleeve is sleeved on the outer wall of the shaft.

[0008] Preferably, the steering assembly further comprises a second gear fixedly arranged on one end of the hollow sleeve extending to the inside of the connecting box and an upper linkage gear meshing between the second gear and the gear ring, wherein the upper linkage gear is fixedly arranged on the outer wall of the mounting rod.

[0009] Preferably, a regulating mechanism for adjusting the upper and lower positions of the upper linkage gear and the lower linkage gear is provided inside the connecting box, and the regulating mechanism includes a threaded plate fixedly connected to the bottom end of the mounting rod, an adjusting screw rotatably arranged inside the connecting box and threadedly connected to the threaded plate, and a driving motor fixedly arranged on the bottom surface of the connecting box, and the driving motor is fixedly connected to one end of the adjusting screw.

[0010] Preferably, two groups of tooth blocks are fixedly connected to one side of the threaded plate, and the two groups of tooth blocks are respectively engaged with the outer walls of the first gear and the second gear, and a limiting column for limiting the movement of the threaded plate is fixedly provided inside the connecting box.

[0011] Preferably, a hydraulic cylinder is provided on one side of the base, and one end of the hydraulic cylinder is fixedly connected to one side of the support.

[0012] Preferably, a conveyor roller is rotatably arranged on one side of the support, and a telescopic rod is fixedly arranged between the conveyor rollers.

[0013] Preferably, a tensioning assembly for automatic tension adjustment of the abrasive belt is arranged on the top surface of the support.

[0014] Preferably, the thickness of the first pressing plate is less than that of the second pressing plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In the present invention, by arranging multiple groups of pressing cylinders on the inner side of the abrasive belt close to the grinding parts of workpieces such as traffic signs, the first tensioning plate and the second tensioning plate in the pressing cylinder are linked with the support rod supporting the abrasive belt through a change gear, a first annular toothed belt, a first gear, a lower linkage gear and a toothed ring, so as to change the overall diameter of the pressing cylinder. Combining with a steering gear, a second annular toothed belt, a second gear and an upper linkage gear, the steering change of the positions of the first tensioning plate and the second tensioning plate is realized, so that the pressure of the pressing cylinder on the abrasive belt changes correspondingly, realizing the change of the abrasive belt from rough grinding to fine grinding, and then from fine grinding to superfine grinding, ensuring that the outer wall of the abrasive belt is closely attached to the grinding parts of workpieces such as traffic signs at different grinding time periods.

[0016] 2. In the present invention, through the arranged threaded plate, adjusting screw rod and driving motor, the setting positions of the lower linkage gear and the upper linkage gear in the up and down direction can be adjusted, so that when the abrasive belt is changed from rough grinding to fine grinding, the lower linkage gear meshes between the first gear and the toothed ring, and the upper linkage gear does not mesh with the second gear. When changing from fine grinding to superfine grinding, the upper linkage gear meshes between the second gear and the toothed ring, and the lower linkage gear does not mesh with the second gear, so as to ensure that the change mechanism and the steering component will not obstruct each other during the corresponding adjustment.

[0017] 3. In the present invention, two groups of tooth blocks are correspondingly arranged on one side of the threaded plate. The two groups of tooth blocks move in the same direction and at the same distance along with the lower linkage gear and the upper linkage gear, and can be correspondingly clamped on the outer wall of the first gear or the second gear in the active state, so that when the abrasive belt drives the change mechanism or the steering component to move, they will not obstruct each other.

[0018] 4. In the present invention, the control screw rod is controlled to rotate by the change gear and the first annular toothed belt, so that the control screw rod can control the threaded seat threadedly connected to its outer wall to stop at any position on its outer wall. Furthermore, according to the height position of the threaded seat on the control screw rod, the extending distances of the first pressing plate and the second pressing plate can be accurately adjusted, so as to control the top-out distances of the first pressing plate and the second pressing plate for the abrasive belt respectively, and accurately adjust the thickness requirements for fine grinding and superfine grinding, without the need to adjust the overall position of the abrasive belt, improving the refinement degree of the grinding process. Description of the Drawings

[0019] The accompanying drawings described herein are used to provide a further understanding of the present invention and form a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings: Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the connection structure of the support, sand belt and conveyor roller of the present invention; Figure 3 is a sectional view of the internal structure of the hollow box and the connection box of the present invention; Figure 4 is a schematic diagram of the connection structure between the hollow box and the pressing cylinder of the present invention; Figure 5 is a schematic diagram of the connection structure of the pressing cylinder, the first annular toothed belt and the second annular toothed belt of the present invention; Figure 6 is a sectional view of the internal structure of the pressing cylinder of the present invention; Figure 7 is a schematic diagram of the connection structure between the control screw and the first annular toothed belt of the present invention; Figure 8 is a schematic diagram of the control screw, the first pressing plate and the second pressing plate of the present invention; Figure 9 is a schematic diagram of the connection structure between the pressing cylinder and the second annular toothed belt of the present invention; Figure 10 is a schematic diagram of the structure of the regulation mechanism of the present invention.

[0020] Reference numerals in the figures: 1, base; 2, support; 3, support rod; 31, support wheel; 32, sand belt; 33, variable speed motor; 34, connection box; 4, tensioning assembly; 5, conveyor roller; 6, variation mechanism; 61, hollow box; 62, pressing cylinder; 621, bracket; 63, first pressing plate; 631, first support plate; 64, second pressing plate; 641, second support plate; 65, control screw; 651, threaded seat; 66, variation gear; 67, first annular toothed belt; 671, shaft rod; 68, linkage assembly; 681, first gear; 682, toothed ring; 683, lower linkage gear; 684, mounting rod; 7, steering assembly; 71, steering gear; 72, second annular toothed belt; 721, hollow bushing; 73, second gear; 74, upper linkage gear; 8, regulation mechanism; 81, threaded plate; 82, adjusting screw; 83, drive motor; 84, tooth block; 9, hydraulic cylinder; 91, telescopic rod. Detailed implementation manners

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0022] Embodiment 1: This embodiment provides a grinding device for the production of traffic signs. Refer to the attached Figure 1-10 , specifically, it includes a base 1 for supporting the support 2, a combined support rod 3 arranged on the top surface of the support 2 for grinding traffic signs, a support wheel 31, a sand belt 32, and a variable-speed motor 33. A connection box 34 for supporting the variable-speed motor 33 is fixedly connected to the side surface of the support 2. Two groups of support rods 3 are rotatably arranged on the top surface of the support 2, and support wheels 31 are fixedly connected to the outer walls of the two groups of support rods 3. The sand belt 32 is sleeved on the outer walls of the two groups of support wheels 31. One end of a group of support rods 3 is fixedly connected to the variable-speed motor 33. A tensioning assembly 4 for automatically tensioning and adjusting the sand belt 32 is arranged on the top surface of the support 2. The tensioning assembly 4 is mainly composed of components such as a tensioning wheel, a mounting seat, and a hydraulic telescopic column. One end of the sand belt 32 is sleeved on the outer wall of the tensioning wheel, so that under the support of the two groups of support wheels 31 and the tensioning wheel, the sand belt 32 is supported on the top surface of the support 2. Specifically refer to the attached Figure 2 and the attached Figure 3 , and through the arranged tensioning assembly 4, the sand belt 32 can always be in a tensioned state, so that the sand belt 32 can effectively grind the burrs at the cutting position of the traffic sign.

[0023] A variable mechanism 6 is arranged on the top surface of the support 2. Through the arranged variable mechanism 6, the sand belt 32 can be changed from rough grinding to fine grinding. The variable mechanism 6 includes a hollow box 61. The hollow box 61 is fixedly arranged on the top surface of the support 2 and is located between the two groups of support wheels 31. A plurality of pressing cylinders 62 that abut against the inner side of the sand belt 32 are arranged inside the hollow box 61. Refer to the attached Figure 3-4 , the outer walls of the plurality of pressing cylinders 62 abut against the inner side of the part of the sand belt 32 that does not contact the support wheels 31. At this time, with the assistance of the plurality of pressing cylinders 62, the part of the sand belt 32 without support can be closely attached to the grinding position of workpieces such as traffic signs, effectively increasing the pressure between the sand belt 32 and the grinding position of workpieces such as traffic signs; A first pressing plate 63 and a second pressing plate 64 for changing the diameter of the pressing cylinder 62 are arranged inside the pressing cylinder 62. A telescopic column is arranged between the inner sides of the first pressing plate 63 and the second pressing plate 64 and the inner wall of the pressing cylinder 62. Specifically refer to the attached Figure 5-8The control screw 65, the threaded seat 651, the first support plate 631 and the second support plate 641 are combined and arranged inside the pressure cylinder 62. The control screw 65 is rotatably arranged inside the pressure cylinder 62. The threaded seat 651 is threadedly sleeved on the outer wall of the control screw 65. The outer wall of the threaded seat 651 is rotatably connected with multiple groups of first support plates 631 and second support plates 641. One end of the multiple groups of first support plates 631 is rotatably connected to the inner side of the first clamping plate 63, and one end of the multiple groups of second support plates 641 is rotatably connected to the inner wall of the second clamping plate 64. The length of the first support plate 631 is smaller than the length of the second support plate 641. The control screw 65 itself cannot rotate alone and needs to be driven by other structures to rotate, so as to adjust the height position of the threaded seat 651 on the control screw 65. In particular, refer to the attached Figure 5 When the first pressing plate 63 and the second pressing plate 64 are in the initial state, one end of the second pressing plate 64 is located outside the pressing cylinder 62, so that the initial distance between the second pressing plate 64 and the control screw 65 is greater than the initial distance between the first pressing plate 63 and the control screw 65, and when the pressing cylinder 62 is in the initial state, the first pressing plate 63 arranged on the outer wall thereof abuts against the inner side of the abrasive belt 32; Refer to the attached Figure 4-6 The control screw 65 extends to one end of the upper part of the pressing cylinder 62 and is fixedly connected to the variable gear 66, and the internal transmission of the hollow box 61 is provided with a first annular toothed belt 67 that meshes with multiple sets of variable gears 66 at the same time, and the inner wall of the hollow box 61 is rotatably provided with a shaft 671 for supporting the first annular toothed belt 67; Refer to the attached Figure 6 and attached Figure 10 The linkage assembly 68 includes a first gear 681 fixedly connected to one end of the shaft 671, a toothed ring 682 fixedly connected to the outer wall of the support rod 3, and a lower linkage gear 683 meshed between the first gear 681 and the toothed ring 682. The height of the toothed ring 682 is greater than the distance between the first gear 681 and the second gear 73. When the lower linkage gear 683 moves up and down under the control of the regulating mechanism 8, the lower linkage gear 683 can always be in meshing state with the outer wall of the toothed ring 682. The shaft 671 is fixedly provided with one end of the first gear 681 and the support rod 3. One end of the rod 3 fixed with a toothed ring 682 is located inside the connecting box 34, and the inner wall of the connecting box 34 is rotatably provided with a mounting rod 684 for supporting the lower linkage gear 683, that is, under the connecting action of the linkage assembly 68, when the variable speed motor 33 controls the transmission of the sanding belt 32, it can simultaneously control the first annular toothed belt 67 to transmit synchronously therewith, so as to regulate the overall diameter of the pressing cylinder 62, so that under the pressure of the pressing cylinder 62 after the diameter is adjusted, the sanding belt 32 can be further tightly fitted with the grinding position of the workpiece such as the traffic sign after the preliminary grinding is completed.

[0024] In the specific implementation process, as shown in the attached Figure 5 , AttachmentFigure 8 and the attached Figure 10 As shown, when the abrasive belt 32 performs primary grinding on workpieces such as traffic signs, first start the variable-speed motor 33, so that the variable-speed motor 33 controls the support rod 3 to rotate at a high speed, and then the abrasive belt 32 supported by the support rod 3 performs high-speed transmission. The abrasive belt 32 in the transmission state performs primary grinding on workpieces such as traffic signs. During this process, the lower linkage gear 683 and the first gear 681 are not in an engaged state, and at this time, the first annular toothed belt 67 and the abrasive belt 32 are not in a linkage state; After the primary grinding of workpieces such as traffic signs is completed, at this time, under the control of the regulation mechanism 8, the lower linkage gear 683 moves down to the position where it meshes with the first gear 681. And because the lower linkage gear 683 and the toothed ring 682 on the outer wall of the support rod 3 are always in an engaged state, therefore, under the meshing and linkage action of the first gear 681, the toothed ring 682 and the lower linkage gear 683, the shaft rod 671 can rotate synchronously with the support rod 3; When the shaft rod 671 rotates synchronously with the support rod 3, the first annular toothed belt 67 supported on the outer wall of the shaft rod 671 performs transmission. During the transmission process, the first annular toothed belt 67 meshes with the variable gears 66 provided on the upper parts of multiple pressing cylinders 62 at the same time. Specifically, refer to the attached Figure 5 , so that the variable gears 66 and the control screws 65 fixedly connected to the variable gears 66 rotate. Then, under the threaded connection action of the control screws 65 and the threaded seats 651, the supporting angles of the first support plate 631 and the second support plate 641 are adjusted, so that the first pressing plate 63 and the second pressing plate 64 supported at one end of the first support plate 631 and the second support plate 641 move away from the pressing cylinder 62, causing the overall diameter of the pressing cylinder 62 to change; After the overall diameter of the pressing cylinder 62 changes, at this time, one side of multiple first pressing plates 63 on the pressing cylinder 62 in the initial state abuts against the inner side of the abrasive belt 32. Then, under the thrust of the first pressing plates 63, the abrasive belt 32 and the workpieces such as traffic signs are further closely attached, so that on the basis of the primary grinding, the workpieces such as traffic signs are further precisely ground. During this process, the overall grinding speed is controlled by the variable-speed motor 33, and the rotation speed of the variable-speed motor 33 can be preset through the PLC control program.

[0025] Embodiment 2: On the basis of Embodiment 1, this embodiment further includes: A bracket 621 for supporting the pressing cylinder 62 is fixedly arranged inside the hollow box 61, and the pressing cylinder 62 is rotatably arranged inside the bracket 621. Refer to the attached Figure 5 and the attached Figure 9The bottom surface of the pressing cylinder 62 is provided with a steering assembly 7, through which the first pressing plate 63 and the second pressing plate 64 in the pressing cylinder 62 can be steered relative to the setting position of the abrasive belt 32, so that the pressing cylinder 62 can further perform ultra-precision grinding on workpieces such as traffic signs on the basis of rough grinding and fine grinding, as shown in the attached figure. Figure 8 The two first clamping plates 63 are in opposite positions, the two second clamping plates 64 are in opposite positions, and the first clamping plates 63 and the second clamping plates 64 are adjusted in position by the steering assembly 7 so that the two can contact the abrasive belt 32 separately. Therefore, when the first clamping plates 63 and the second clamping plates 64 are rotated to adjust the contact with the abrasive belt 32 separately, only a ninety-degree rotation adjustment is required to achieve the fine grinding and super fine grinding operation of the abrasive belt 32. In particular, refer to the attached Figure 5 The thickness of the first pressing plate 63 is slightly thinner than that of the second pressing plate 64. When the first pressing plate 63 and the second pressing plate 64 are in the initial state, one end of the second pressing plate 64 is located outside the pressing cylinder 62, so that the initial distance between the second pressing plate 64 and the control screw 65 is greater than the initial distance between the first pressing plate 63 and the control screw 65. Therefore, when the first pressing plate 63 contacts the abrasive belt 32 alone, it can assist the abrasive belt 32 in fine grinding the traffic sign. When the second pressing plate 64 rotates to a position where it contacts the abrasive belt 32 alone, the second pressing plate 64 can assist the abrasive belt 32 in super-fine grinding the traffic sign. Component 7 includes a steering gear 71 fixedly arranged on the bottom surface of the pressing cylinder 62, a second annular toothed belt 72 which is transmission-arranged inside the hollow box 61 and meshed with the outer wall of the plurality of steering gears 71, and a hollow shaft sleeve 721 which is rotationally arranged on the inner wall of the hollow box 61 and is used to support the second annular toothed belt 72. The second annular toothed belt 72 is located at the lower part of the first annular toothed belt 67. The hollow shaft sleeve 721 is sleeved on the outer wall of the shaft rod 671. A bearing which does not interfere with each other can be arranged between the inner wall of one end of the hollow shaft sleeve 721 and the outer wall of one end of the shaft rod 671, so that when the hollow shaft sleeve 721 rotates, it will not drive the shaft rod 671 to rotate synchronously, and vice versa. Refer to the attached Figure 9 and attached Figure 10 The steering assembly 7 also includes a second gear 73 fixedly set on the hollow shaft sleeve 721 and extending to one end inside the connecting box 34, and an upper linkage gear 74 meshing between the second gear 73 and the gear ring 682. The second gear 73 is located on the upper part of the first gear 681, and the upper linkage gear 74 is fixedly set on the outer wall of the mounting rod 684, and the upper linkage gear 74 is located on the upper part of the lower linkage gear 683.

[0026] In the specific implementation process, as shown in the attached Figure 5 , Attachment Figure 9 and attached Figure 10As shown, after the abrasive belt 32 is finely ground with the assistance of the first pressing plate 63 provided in the pressing cylinder 62, at this time, the regulating mechanism 8 can drive the upper linkage gear 74 and the lower linkage gear 683 provided on the outer wall of the mounting rod 684 to move upward simultaneously, so that the upper linkage gear 74 meshes with the outer wall of the second gear 73, and the lower linkage gear 683 does not mesh with the outer wall of the first gear 681, enabling the hollow shaft sleeve 721 to be linked with the support rod 3 under the meshing action of the second gear 73, the upper linkage gear 74 and the tooth ring 682. Furthermore, the second annular toothed belt 72 supported by the hollow shaft sleeve 721 is driven, and the second annular toothed belt 72 in the transmission process drives a plurality of steering gears 71 meshing with it to rotate, thereby driving the pressing cylinder 62 to rotate along the support 621, so that the second pressing plate 64 with a thicker thickness than the first pressing plate 63 on the pressing cylinder 62 rotates to a position where it contacts the abrasive belt 32 alone, and the pushing distance of the second pressing plate 64 on the abrasive belt 32 is greater than the pushing distance of the first pressing plate 63 on the abrasive belt 32. As a result, under the thrust of the second pressing plate 64, the abrasive belt 32 is further closely attached to workpieces such as traffic signs, enabling further ultra-precise grinding of workpieces such as traffic signs on the basis of preliminary grinding and fine grinding.

[0027] Embodiment 3: On the basis of Embodiments 1 and 2, this embodiment further includes: A regulating mechanism 8 for adjusting the up and down positions of the upper linkage gear 74 and the lower linkage gear 683 is provided inside the connection box 34. For specific reference, see Appendix Figure 4 and Appendix Figure 10 , the regulating mechanism 8 includes a threaded plate 81 fixedly connected to the bottom end of the mounting rod 684, an adjusting screw 82 rotatably arranged inside the connection box 34 and threadedly connected to the threaded plate 81, and a driving motor 83 fixedly arranged on the inner bottom surface of the connection box 34. The driving motor 83 is fixedly connected to one end of the adjusting screw 82, and a limiting column for limiting the movement of the threaded plate 81 is fixedly arranged inside the connection box 34; For reference, see Appendix Figure 10 , two tooth blocks 84 are fixedly connected to one side of the threaded plate 81, and the two tooth blocks 84 are respectively clamped with the outer walls of the first gear 681 and the second gear 73, so as to be able to lock the first gear 681 and the second gear 73 in the active state respectively.

[0028] In the specific implementation process, as shown in Appendix Figure 4 and Appendix Figure 10 shown, The first gear 681, the tooth ring 682 and the lower linkage gear 683 are meshed. For specific reference, see Appendix Figure 10 , at this time, the upper linkage gear 74 does not mesh with the second gear 73, and one tooth block 84 is clamped with the outer wall of the second gear 73. In this case, the first annular toothed belt 67 and the abrasive belt 32 are in a linked state, and the second annular toothed belt 72 is not linked with the abrasive belt 32; The second gear 73 meshes with the toothed ring 682 and the upper linkage gear 74. At this time, the lower linkage gear 683 does not mesh with the first gear 681, and a set of tooth blocks 84 is clamped on the outer wall of the first gear 681. In this case, the second annular toothed belt 72 is in a linkage state with the abrasive belt 32, and the first annular toothed belt 67 is not in a linkage state with the abrasive belt 32. The lower linkage gear 683 does not mesh with the first gear 681, and the upper linkage gear 74 does not mesh with the second gear 73. At this time, the abrasive belt 32 is not in a linkage state with either the first annular toothed belt 67 or the second annular toothed belt 72, and the abrasive belt 32 can be driven independently, thereby completing the preliminary grinding, i.e., rough grinding, of workpieces such as traffic signs.

[0029] Embodiment 4: On the basis of Embodiments 1, 2, and 3, this embodiment further includes: a set of conveying rollers 5 are respectively rotatably provided on one side of two sets of supports 2, and a hydraulic cylinder 9 is provided on one side of the base 1. One end of the hydraulic cylinder 9 is fixedly connected to one side of the support 2. Specifically, refer to the attached Figure 1 and the attached Figure 2 , and a telescopic rod 91 is fixedly provided between the two sets of conveying rollers 5. By providing the telescopic rod 91, after the positions of the two sets of supports 2 are adjusted, the conveying rollers 5 between the two sets of supports 2 can always maintain a connected state.

[0030] In the specific implementation process, as shown in the attached Figure 1 and the attached Figure 2 , by opening the hydraulic cylinder 9, the support 2 is driven to slide along the top surface of the base 1, so as to adjust the distance between the two sets of supports 2, so as to clamp workpieces such as traffic signs of different sizes, and ensure that the outer wall of the abrasive belt 32 is in contact with the outer wall of the workpiece such as the traffic sign.

[0031] Specifically, the working principle and operation method of the present invention are as follows: Before grinding, according to the size of the workpiece such as the traffic sign, the hydraulic cylinder 9 is opened, so that the hydraulic cylinder 9 drives the support 2 connected to its one end to move along the top surface of the base 1, and then the distance between the two sets of supports 2 is adjusted, so that the workpiece such as the traffic sign is limited between the two sets of supports 2 after corresponding adjustment, and the bottom surface of the workpiece such as the traffic sign is in contact with the top surface of the conveying rollers 5 provided between the two sets of supports 2. Specifically, the movement of the workpiece such as the traffic sign is controlled by an external pushing device, such as a robotic arm or a mechanical pusher, etc. The external pushing device is not specifically shown in the drawings.

[0032] During rough grinding, at this time, the toothed ring 682 does not mesh with the first gear 681 and the second gear 73, and then the variable-speed motor 33 is turned on, so that the variable-speed motor 33 controls the support rod 3 to rotate forward at a high speed, and then the abrasive belt 32 supported by the support rod 3 is driven to rotate forward at a high speed. And at this time, as shown in the attached Figure 5The outer wall of the pressing cylinder 62 in the state is closely fitted with the inner wall of the abrasive belt 32, so that under the support and pressure of the pressing cylinder 62, the abrasive belt 32 in the transmission state roughly grinds the workpiece such as the traffic sign.

[0033] During fine grinding, after a period of rough grinding, the grinding parts of workpieces such as traffic signs become thinner, resulting in insufficient contact between the sanding belt 32 and the grinding parts of workpieces such as traffic signs. Based on this situation, the drive motor 83 is first started, so that the drive motor 83 controls the rotation of the adjusting screw 82, and then under the threaded connection between the adjusting screw 82 and the threaded plate 81, the threaded plate 81 drives the upper linkage gear 74 and the lower linkage gear 683 provided on the outer wall of the mounting rod 684 at one end thereof to move upward, so that the lower linkage gear 683 is meshed between the first gear 681 and the gear ring 682, so that the shaft rod 671 rotates synchronously with the support rod 3, and the first annular toothed belt 67 supported by the outer wall of the shaft rod 671 performs positive transmission. During the transmission process, the first annular toothed belt 67 is simultaneously meshed with the variable gear 66 provided on the upper part of the multiple groups of pressing cylinders 62. For details, please refer to the attached Figure 5 , so that the variable gear 66 and the control screw 65 fixedly connected to the variable gear 66 rotate in the opposite direction, and then under the threaded connection between the control screw 65 and the threaded seat 651, the threaded seat 651 moves downward along the outer wall of the control screw 65 to adjust the supporting angle of the first support plate 631 and the second support plate 641, so that the first clamping plate 63 and the second clamping plate 64 are spread apart; After the first pressing plate 63 and the second pressing plate 64 are spread apart, the first pressing plate 63 first abuts against the inner side of the abrasive belt 32. At this time, under the thrust of the first pressing plate 63, the side of the rotating abrasive belt 32 and the workpiece such as the traffic sign are more closely fitted, so that on the basis of rough grinding, the rotating abrasive belt 32 further finely grinds the workpiece such as the traffic sign; In particular, when resetting the first clamping plate 63 and the second clamping plate 64, the speed-changing motor 33 is turned on, so that the speed-changing motor 33 rotates in the opposite direction, and the support rod 3 rotates equally accordingly. At this time, the shaft 671 linked with the support rod 3 through the lower linkage gear 683, the gear ring 682 and the first gear 681 rotates in the opposite direction, and the first annular toothed belt 67 supported by the outer wall of the shaft 671 performs reverse transmission, thereby causing the multiple sets of variable gears 66 meshing with the first annular toothed belt 67 and the control screw 65 fixedly connected to the variable gear 66 to rotate forward. At this time, under the action of the threaded connection between the control screw 65 and the threaded seat 651, the threaded seat 651 moves upward along the outer wall of the control screw 65, and the first support plate 631 and the second support plate 641 are retracted, thereby causing the first clamping plate 63 and the second clamping plate 64 to be retracted and reset.

[0034] Ultra-precision grinding: On the basis of rough grinding and fine grinding, the polished part of workpieces such as traffic signs is further thinned. At this time, the drive motor 83 is started again, so that the drive motor 83 controls the rotation of the adjusting screw 82. Then, under the screw connection between the adjusting screw 82 and the threaded plate 81, the threaded plate 81 drives the upper linkage gear 74 and the lower linkage gear 683 arranged on the outer wall of the mounting rod 684 at one end to move upward again, so that the upper linkage gear 74 meshes between the second gear 73 and the tooth ring 682. At this time, the lower linkage gear 683 does not mesh with the first gear 681, so that the hollow shaft sleeve 721 rotates synchronously with the support rod 3, and the second annular toothed belt 72 supported on the outer wall of the hollow shaft sleeve 721 is driven. During the transmission process, the second annular toothed belt 72 meshes with multiple steering gears 71 to drive the pressing cylinder 62 to rotate along the bracket 621, so that the part of the pressing cylinder 62 provided with the second pressing plate 64 rotates to the position in contact with the inner wall of the sand belt 32. As a result, under the thrust of the second pressing plate 64, the sand belt 32 is further closely attached to the workpieces such as traffic signs, so that on the basis of preliminary grinding and fine grinding, the sand belt 32 in the transmission process performs further ultra-precision grinding on the workpieces such as traffic signs.

[0035] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A grinding device for producing traffic signs, comprising a base (1) for supporting a support (2), a combined support rod (3) arranged on the top surface of the support (2) for grinding traffic signs, a support wheel (31), an abrasive belt (32) and a variable speed motor (33), characterized in that: The top surface of the support (2) is provided with a changing mechanism (6), and the changing mechanism (6) comprises: A hollow box (61) is fixedly arranged on the top surface of the support (2), wherein a plurality of groups of pressing cylinders (62) are arranged inside the hollow box (61) and abut against the inner side of the abrasive belt (32), and a first pressing plate (63) and a second pressing plate (64) for changing the diameter of the pressing cylinder (62) are arranged inside the pressing cylinder (62); A control screw (65), a threaded seat (651), a first support plate (631) and a second support plate (641) are arranged in combination inside the pressing cylinder (62), and one end of the first support plate (631) and the second support plate (641) are rotatably connected to the inner walls of the first pressing plate (63) and the second pressing plate (64) respectively; A variable gear (66) is arranged on the outer wall of the control screw (65), and the internal transmission of the hollow box (61) is provided with a first annular toothed belt (67) that meshes with the plurality of sets of variable gears (66) at the same time, and the internal rotation of the hollow box (61) is provided with a shaft (671) for supporting the first annular toothed belt (67); A linkage assembly (68) comprises a first gear (681) fixedly connected to one end of the shaft (671), a toothed ring (682) fixedly connected to the outer wall of the support rod (3), and a lower linkage gear (683) meshed between the first gear (681) and the toothed ring (682).

2. A grinding device for producing traffic signs according to claim 1, characterized in that: A connecting box (34) for supporting the variable speed motor (33) is fixedly connected to the side surface of the support (2); one end of the shaft (671) fixedly provided with a first gear (681) and one end of the support rod (3) fixedly provided with a gear ring (682) are both located inside the connecting box (34); one end of the support rod (3) is fixedly connected to the variable speed motor (33); and a mounting rod (684) for supporting the lower linkage gear (683) is rotatably provided on the inner wall of the connecting box (34).

3. The grinding device for producing traffic signs according to claim 1, characterized in that: A bracket (621) for supporting a pressing cylinder (62) is fixedly arranged inside the hollow box (61), and a steering assembly (7) is arranged on the bottom surface of the pressing cylinder (62). The steering assembly (7) comprises a steering gear (71) fixedly arranged on the bottom surface of the pressing cylinder (62), a second annular toothed belt (72) transmission-arranged inside the hollow box (61) and meshing with the outer walls of the plurality of groups of steering gears (71), and a hollow shaft sleeve (721) rotatably arranged on the inner wall of the hollow box (61) for supporting the second annular toothed belt (72), wherein the hollow shaft sleeve (721) is sleeved on the outer wall of the shaft rod (671).

4. A grinding device for producing traffic signs according to claim 3, characterized in that: The steering assembly (7) further comprises a second gear (73) fixedly arranged on a hollow shaft sleeve (721) extending to one end inside the connection box (34), and an upper linkage gear (74) meshing between the second gear (73) and the gear ring (682), wherein the upper linkage gear (74) is fixedly arranged on the outer wall of the mounting rod (684).

5. A grinding device for producing traffic signs according to claim 4, characterized in that: The connection box (34) is provided with a regulating mechanism (8) for regulating the upper and lower positions of the upper linkage gear (74) and the lower linkage gear (683), the regulating mechanism (8) comprising a threaded plate (81) fixedly connected to the bottom end of the mounting rod (684), an adjusting screw (82) rotatably arranged inside the connection box (34) and threadedly connected to the threaded plate (81), and a driving motor (83) fixedly arranged on the inner bottom surface of the connection box (34), the driving motor (83) being fixedly connected to one end of the adjusting screw (82).

6. A grinding device for producing traffic signs according to claim 5, characterized in that: Two groups of tooth blocks (84) are fixedly connected to one side of the threaded plate (81), and the two groups of tooth blocks (84) are respectively engaged with the outer walls of the first gear (681) and the second gear (73), and a limiting column for limiting the movement of the threaded plate (81) is fixedly arranged inside the connection box (34).

7. The grinding device for producing traffic signs according to claim 1, characterized in that: A hydraulic cylinder (9) is provided on one side of the base (1), and one end of the hydraulic cylinder (9) is fixedly connected to one side of the support (2).

8. The grinding device for producing traffic signs according to claim 7, characterized in that: A conveying roller (5) is rotatably provided on one side of the support (2), and a telescopic rod (91) is fixedly provided between the conveying rollers (5).

9. The grinding device for producing traffic signs according to claim 1, characterized in that: The top surface of the support (2) is provided with a tensioning assembly (4) for automatically tensioning and adjusting the sanding belt (32).

10. The grinding device for producing traffic signs according to claim 1, characterized in that: The thickness of the first pressing plate (63) is smaller than the thickness of the second pressing plate (64).

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