A method for replacing the lower brush roller

Abstract

This invention discloses a method for replacing a lower brush roller, comprising four steps: pre-setting a roller unloading module, hoisting the roller unloading module to the upper end of a support seat, unloading the roller, and hoisting the roller unloading module away from the support seat. During roller unloading, the pre-set roller unloading module is hoisted to the upper end of the support seat using a flexible sling, and the two roller seats on the roller unloading module provide rigid support for the roller body of the lower brush roller, ensuring that the roller shaft of the lower brush roller remains unchanged during unloading. After the roller shafts at both ends of the lower brush roller are separated from the sliding seat and the fixed seat, the roller unloading module and the lower brush roller can be hoisted away from the upper end of the support seat simply using the flexible sling. The entire roller replacement process is stable and efficient, improving the reliability and efficiency of lower brush roller replacement.

Description

Technical Field

[0001] This invention relates to the field of strip grinding, and in particular to a method for replacing the lower brush roller. Background Technology

[0002] Steel plates, also known as strips, are rolled up and stored after production, commonly known as steel coils. These coils then go to different product manufacturing plants to be made into corresponding parts, depending on the specific needs. Between the time the strip enters the processing plant and when it is cut, it reacts with moisture and chemicals in the air, causing the surface material to peel or rust. To remove the rust layer, the surface is typically polished using upper and lower brush rollers installed in a steel plate grinding machine. Both upper and lower brush rollers include a roller body and roller shafts located at both ends. During polishing, the two brush rollers contact the steel plate surface. After prolonged use, the polishing effect of the brush rollers decreases, thus requiring replacement.

[0003] When replacing the upper brush roller, the unloading roller trolley can be driven into the brush grinding equipment. The unloading process can be referenced in the unloading roller trolley patent with announcement number CN110842728B. However, the lower brush roller can usually only be replaced manually. For example, in the oxide scale treatment device with announcement number CN216371592U, the support seat is equipped with two bearing seats. One of the two bearing seats is slidable, and the other is fixed. The two bearing seats can be regarded as sliding seats and fixed seats respectively. The roller shafts at both ends of the lower brush roller are respectively inserted into the sliding seats and fixed seats. When unloading the roller, the support seat needs to be moved out of the frame, and then the sliding seats and fixed seats are disengaged from the roller shafts at both ends of the lower brush roller. When the sliding seats and fixed seats are disengaged from the lower brush roller, the lower brush roller needs to be suspended by the worker using the flexible slings on the crane to keep the lower brush roller stable. However, this unloading method has shortcomings.

[0004] The flexible slings are controlled by workers, making it difficult to control the lifting force. If the slings do not provide sufficient lifting force to the lower brush roller, the lower brush roller will tilt to one side of the sliding seat due to gravity when the sliding seat disengages from the roller shaft at one end of the lower brush roller, causing the roller shaft at the other end, which is stuck in the fixed seat, to deform.

[0005] If the lifting force applied to the lower brush roller by the flexible sling is too large, although the problem of the lower brush roller tilting can be avoided, this will cause the roller shafts at both ends of the lower brush roller to get stuck with the sliding seat or fixed seat, making it difficult for the sliding seat and fixed seat to detach; therefore, this method of unloading the roller has low reliability and efficiency. Summary of the Invention

[0006] This invention provides a method for replacing a lower brush roller. A pre-installed unloading roller module is hoisted onto the upper end of a support base using flexible slings. The two roller seats on the unloading roller module provide rigid support for the lower brush roller body, ensuring that the roller shaft of the lower brush roller remains unchanged during unloading. After the roller shafts at both ends of the lower brush roller detach from the sliding seat and the fixed seat, the unloading roller module and the lower brush roller can be lifted off the upper end of the support base simply by using flexible slings. The entire roller replacement process is stable and efficient, improving the reliability and efficiency of lower brush roller replacement.

[0007] The technical solution of this invention is implemented as follows:

[0008] A method for replacing a lower brush roller includes the following steps:

[0009] S1: Pre-set unloading roller module; The unloading roller module includes a frame for use with flexible sling hoisting, and two left and right symmetrical roller seats are slidably connected to the lower end of the frame; The roller seat includes two front and rear opposite, downward extending support seats, and a support member is connected to the inner side of the support seats; And a clearance area with an open lower end is formed between the two support seats to avoid the roller shaft.

[0010] S2; Hoist the unloading roller module to the upper end of the support seat; The support seat has sliding seats and fixed seats that are respectively clamped at both ends of the lower brush roller. Connect the flexible sling to the frame and lift the entire unloading roller module. Then place the entire unloading roller module horizontally at the corresponding position on the upper end of the support seat, and make the two clearance areas correspond to the roller shaft positions at both ends of the lower brush roller.

[0011] S3: Unload the roller; control the two roller seats to move closer to each other, and move the two sets of front and rear opposite support parts to the predetermined position to support the roller body of the lower brush roller. Then, make the sliding seat slide away from the lower brush roller and disengage from the roller shaft at one end of the lower brush roller. Then control the two roller seats and the lower brush roller to slide away from the fixed seat, so that the fixed seat disengages from the roller shaft at the other end of the lower brush roller.

[0012] S4: Lifting the unloading roller module; Using flexible slings, the entire unloading roller module and the lower brush roller are lifted off the upper end of the support, thereby removing the lower brush roller from the support.

[0013] Preferably, in step S1, the frame is provided with a hoisting and leveling assembly, which includes a first lifting lug and a second lifting lug that are horizontally opposite each other. The first lifting lug has a single first lifting hole, and the second lifting lug has multiple horizontally spaced second lifting holes. In step S2, one end of the flexible sling is hoisted into the first lifting hole, and the other end of the flexible sling is hoisted into one of the multiple second lifting holes, so that the hoisted unloading roller module remains horizontal.

[0014] Preferably, in step S1, the support member is provided with an outwardly open support groove, which includes a support surface for supporting the lower brush roller and an abutment surface perpendicular to the support surface. In step S3, when the two roller assemblies support the lower brush roller, the abutment surfaces on the left and right sides abut against the two end faces of the lower brush roller respectively, so as to prevent the lower brush roller from moving left and right when it is separated from the sliding seat and the fixed seat, and to ensure that the unloading process is stable.

[0015] Preferably, in step S1, a linkage cylinder is provided between the two roller seats. The linkage cylinder includes a cylinder body connected to the two roller seats respectively and a telescopic rod that moves within the cylinder body. In step S3, the piston rod extends and retracts, bringing the two roller seats closer to each other to a predetermined position.

[0016] Preferably, there are two linkage cylinders. The roller seat includes a horizontal plate that is slidably connected to the lower end of the frame 1. Two support seats are located at the lower end of the horizontal plate. An installation plate is provided between the horizontal plate and each support seat. In step S3, the piston rod and cylinder body of each cylinder are respectively hinged to each of the two left and right opposite installation plates, so that the front and rear ends of the two roller seats move closer to each other at the same time. The hinge design can prevent the linkage cylinder from jamming when it moves.

[0017] Preferably, the two roller seats are connected by a linkage cylinder to form a synchronously movable roller seat assembly; in step S1, a positioning adjustment assembly is provided between the frame and the roller seat assembly, the positioning adjustment assembly includes an adjustment rack and an adjustment gear respectively set on the frame and the roller seat assembly; a control rod is installed on the adjustment gear, and a control handwheel exposed on the frame is installed on the outer end of the control rod; in step S2, the control handwheel is rotated and the two roller seats are moved synchronously in the left and right directions and then stopped at the corresponding positions, so that the two roller seats are symmetrical about left and right with the lower brush roller as the reference; to avoid the phenomenon that one end of the lower brush roller is supported and the other end is not supported.

[0018] Preferably, the two roller seats are connected by a linkage cylinder to form a roller seat assembly that can move synchronously; in step S1, a pushing cylinder is provided on the roller seat on the same side as the fixed seat; in step S3, after the sliding seat disengages from the roller shaft at one end of the lower brush roller, the piston rod of the pushing cylinder extends and acts on the fixed seat, so that the roller seat assembly and the lower brush roller move away from the fixed seat, so that the fixed seat disengages from the roller shaft at the other end of the lower brush roller.

[0019] Preferably, in step S1, the frame is further provided with a lifting adjustment mechanism, which includes a drive assembly and an eccentric adjustment assembly symmetrically arranged on the frame. The eccentric adjustment assembly includes a lifting assembly and a transmission assembly. The transmission assembly includes a set of front-to-back opposing transmission wheels arranged on the frame. The lifting assembly includes a lifting component and a set of connecting rods arranged between the lifting component and the two front-to-back opposing transmission wheels. The lower end of each connecting rod is hinged to the lifting component, and the upper end of the connecting rod forms an eccentric rotational connection with the corresponding transmission wheel. In step S3, when the two roller seats approach each other to a predetermined position, a preset gap is formed between the support component and the roller body of the lower brush roller. At this time, the drive assembly can drive the two sets of left-to-right opposing transmission wheels to rotate synchronously by a predetermined angle, so that the two lifting components act downward on the support seat and lift the frame to a predetermined height, thereby eliminating the preset gap between the support component and the roller body, and ensuring that the support component supports the roller body.

[0020] Preferably, the transmission wheel is a transmission gear, and the drive assembly includes a drive shaft and two drive gears, with a linkage connecting the two drive gears; the corresponding drive gear meshes with each of the two front-to-back opposing transmission gears simultaneously; the drive shaft is directly or indirectly connected to one of the drive gears, and an adjusting handwheel is connected to the outer end of the drive shaft. In step S3, rotating the adjusting handwheel causes the multiple transmission wheels to rotate synchronously at a predetermined angle and stop at the corresponding position to eliminate the preset gap between the support and the roller.

[0021] Preferably, a self-locking transmission component is provided between the drive shaft and the corresponding drive gear. The self-locking transmission component is a worm gear transmission box. The drive shaft is connected to the input end of the worm gear transmission box, and the corresponding drive gear is connected to the output end of the worm gear transmission box. In step S3, after the drive gear rotates to the position, the worm gear transmission box restricts the drive gear from rotating in the opposite direction, so that the two transmission wheels stop at the predetermined position, preventing the lifting component from retracting upwards due to the reverse rotation of the transmission wheels.

[0022] Preferably, the upper end of the connecting rod is provided with a pivot hole, and an eccentric assembly is installed in the pivot hole. The eccentric assembly includes a drive shaft and an eccentric sleeve. The eccentric sleeve is provided with an eccentric hole that is not concentric with the pivot hole. One end of the drive shaft is connected to the drive wheel, and the other end of the drive shaft passes through the eccentric hole and is circumferentially fixed to the eccentric sleeve. In step S3, the drive wheel rotates to drive the lifting component to act downward on the bearing seat. The eccentric sleeve can rely on the rotation of the drive wheel to form an eccentric drive on the connecting rod, without the need to open an eccentric through hole on the drive wheel, ensuring uniform stress distribution on the drive wheel. While driving the lifting component to move downward, it reduces the probability of damage to the drive wheel and the maintenance cost.

[0023] Preferably, one of the drive shafts is connected to an exposed pointer on the frame. The frame is equipped with a scale corresponding to the pointer position, and multiple scale values ​​are evenly distributed along the circumference of the scale. In step S3, after the drive shaft rotates to the corresponding angle and stops at the corresponding position, the range of change of the pointer's scale value on the scale is visually inspected to confirm that the preset gap between the support and the roller has been eliminated. This makes it easier for the operator to confirm whether the preset gap has been eliminated.

[0024] The beneficial effects of the present invention, which adopts the above technical solution, are as follows:

[0025] The flexible unloading method of the present invention involves hoisting the unloading module to the upper end of the support seat using slings during unloading. This ensures that the support members of the two roller seats on the unloading module support the roller body of the lower brush roller in place, preventing deformation of the roller shafts at both ends of the lower brush roller when they detach from the sliding seat and the fixed seat. After the lower brush roller detaches from the sliding seat and the fixed seat, the unloading module and the lower brush roller can be removed from the support seat simply by hoisting the unloading module and the lower brush roller again using slings. This flexible unloading method is simple to operate and improves the reliability and efficiency of unloading.

[0026] The telescopic linkage between the two roller seats can change the distance between them to unload lower brush rollers of different lengths from the support seat. Simultaneously, the telescopic linkage connects the two roller seats into a synchronously sliding roller seat assembly, allowing the two roller seats and the lower brush roller to slide synchronously away from the fixed seat when the lower brush roller detaches from the fixed seat. Furthermore, the synchronously sliding roller seat assembly facilitates adjustment of its position on the frame, demonstrating ingenious design. It offers multiple benefits.

[0027] Due to manufacturing and assembly errors, to avoid interference between the support component and the lower brush roller body when the support component moves with the roller seat, the distance between the two opposing support components is relatively wide. This allows the support component to form a pre-set gap with the lower brush roller body after the roller seat is in place. After the pre-set gap is formed, the height of the frame can be adjusted by the lifting adjustment mechanism to eliminate the pre-set gap between the support component and the roller body, thus ensuring that the support component provides a stable support effect on the roller body. Attached Figure Description

[0028] Figure 1 This is a structural diagram of the unloading roller module;

[0029] Figure 2 This is a schematic diagram of the unloading roller module from another angle;

[0030] Figure 3 A cross-sectional view of the roller body supporting the lower brush roller, with two front and rear opposing support members.

[0031] Figure 4 This is a schematic diagram showing the unloading roller module placed on top of the support.

[0032] Figure 5This is a schematic diagram showing the sliding seat disengaging from one end of the lower brush roller shaft after the lower brush roller body is supported.

[0033] Figure 6 A schematic diagram illustrating how the hydraulic cylinder is pushed to actuate and causes the roller shaft at the other end of the lower brush roller to disengage from the fixed seat;

[0034] Figure 7 The structural diagram of the lifting and adjusting mechanism is shown below, with the frame removed.

[0035] Figure 8 This is a sectional view of the lifting and adjusting mechanism;

[0036] Figure 9 This is an enlarged sectional view of the position where the upper end of the connecting rod mates with the drive shaft;

[0037] Figure 10 An enlarged view of the pointer and dial on the frame;

[0038] Figure 11 This is a schematic diagram of the eccentric sleeve structure;

[0039] Figure 12 This is a schematic diagram of the positioning adjustment component;

[0040] Figure 13 A structural diagram showing how two roller supports hold up the lower brush roller;

[0041] Figure 14 This is a schematic diagram of the roller holder structure;

[0042] Figure 15 A simplified diagram illustrating the principle of the unloading roll module changing rolls at the upper end of the support seat;

[0043] Figure 16 A comparison diagram showing the presence of the preset gap and the elimination of the preset gap;

[0044] Figure 17 This is a flowchart of the method steps of the present invention;

[0045] The reference numerals in the attached drawings are as follows: 1-Frame, 1a-Bearing seat, 2-Roller seat, 3-Pushing cylinder, 4-Lifting and adjusting mechanism, 5-Roller body, 51-Circular boss, 11-First lifting lug, 12-Second lifting lug, 13-First lifting hole, 13a-Second lifting hole, 14-Sliding seat, 15-Fixed seat, 16-Guide seat, 17-Guide wheel, 18-Hydraulic station, 21-Linkage cylinder, 22-Support component, 23-Control handwheel, 24-Support part, 25-Horizontal plate, 26-Mounting plate, 27-Reinforcing plate, 41-Drive shaft, 42-Worm gear transmission box, 43-Eccentric adjustment assembly, 221-Supporting surface. 222-Limiting surface, 231-Adjusting rack, 232-Adjusting gear, 241-Allowing groove, 242-Abutting surface, 251-Connecting seat, 252-Rotating sleeve, 261-Fixing plate, 411-Adjusting handwheel, 412-Pointer, 413-Digital dial, 431-Drive gear, 432-Transmission wheel, 432a-Transmission shaft, 433-Connecting rod, 434-Lifting component, 435-Guide plate, 436-Eccentric sleeve, 4361-Eccentric hole, 4362-Retaining ring groove, 4363-Annular groove, 437-Spherical bearing, 438-Output shaft, 439-Linkage rod, s-Preset clearance. Detailed Implementation

[0046] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0047] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0048] like Figure 1-16 As shown, the specific embodiments of the present invention are as follows:

[0049] This embodiment provides a method for replacing the lower brush roller, including the following steps:

[0050] S1: Pre-installed unloading roller module; The unloading roller module includes a frame 1 for use with flexible sling hoisting, and two left and right symmetrical roller seats 2 are slidably connected to the lower end of the frame 1; The roller seat 2 includes two front and rear opposite, downwardly extending support seats 24, and a support member 22 is connected to the inner side of the support seat 24; and a clearance area 241 with an open lower end is formed between the two support seats 24 for avoiding the roller shaft;

[0051] S2; Hoist the unloading roller module to the upper end of the support seat 1a; The support seat 1a has sliding seats 14 and fixed seats 15 respectively clamping the two ends of the lower brush roller, and the sliding seats 14 and fixed seats 15 are set in a box with an opening on one side of the support seat 1a; Connect the flexible sling to the frame 1 and hoist the entire unloading roller module, and then place the entire unloading roller module horizontally at the corresponding position on the upper end of the support seat 1a, and make the two clearance areas 241 correspond to the roller shaft positions at both ends of the lower brush roller respectively; The corresponding position usually refers to the upper end of the box of the support seat 1a;

[0052] S3: Unload the roller; control the two roller seats 2 to move closer to each other, and move the two sets of front and rear opposite support members 22 to the predetermined position to support the roller body 5 of the lower brush roller. Then, slide the sliding seat 14 away from the lower brush roller and disengage from the roller shaft at one end of the lower brush roller. Then control the two roller seats 2 and the lower brush roller to slide away from the fixed seat 15, so that the fixed seat 15 disengages from the roller shaft at the other end of the lower brush roller. At this time, the lower brush roller has been disengaged from the sliding seat 14 and the fixed seat 15.

[0053] S4: Lifting the unloading roller module; Using flexible slings, the entire unloading roller module and the lower brush roller are lifted off the upper end of the support seat 1a, thereby removing the lower brush roller from the support seat 1a; The entire unloading roller process is simple and efficient, with low operation difficulty, effectively avoiding the problems of roller deformation and low unloading efficiency.

[0054] Furthermore, in this embodiment, the sling needs to be first suspended on the hook of the crane, and then both ends of the sling are respectively suspended on the frame 1. In order to ensure that the suspended unloading roller module is kept horizontal, in step S1, the frame 1 is provided with a lifting and leveling assembly. The lifting and leveling assembly includes a first lifting lug 11 and a second lifting lug 12 that are horizontally opposite each other. The first lifting lug 11 is provided with a single first lifting hole 13, and the second lifting lug 12 is provided with multiple horizontally spaced second lifting holes 13a. In step S2, one end of the flexible sling is suspended in the first lifting hole 13, and the other end of the flexible sling is suspended in one of the multiple second lifting holes 13a. That is to say, the operator can switch the lifting end of the sling in the multiple second lifting holes 13 until the first lifting lug 11 and the second lifting lug 12 are at the same height position, so that the suspended unloading roller module is kept horizontal.

[0055] Furthermore, to ensure that the unloading roller module is placed in place on the upper end of the support seat 1a, a front-rear guide mechanism and a left-right guide mechanism are provided between the frame 1 and the support seat 1a. The front-rear guide mechanism includes an elastic guide wheel 17 set on the frame 1 and a guide block set on the support seat 1a. The left-right guide mechanism includes a guide seat 16 set on the frame 1 and a guide column set on the support seat 1a. Through the cooperation of the elastic guide wheel 17 and the guide block, and the cooperation of the guide seat 16 and the guide column, the position of the unloading roller module in the hoisting state can be guided so that it is stably placed in the corresponding position on the upper end of the support seat 1a. The specific structure of the front-rear guide mechanism and the left-right guide mechanism can be referred to the corresponding content in the idler roller device patent with announcement number CN221821042U, and will not be repeated here.

[0056] Furthermore, the roller body 5 of the lower brush roller includes a roller for laying brush strips. The outer diameter of the roller is much larger than the outer diameter of the roller shaft. If the brush strips are not considered, the support member 22 can be supported on the roller. However, in order to avoid the support member 22 contacting the brush strips on the roller and causing the brush strips to deform, circular bosses 51 for setting the roller shaft are concentrically installed at both ends of the roller. The outer diameter of the circular bosses 51 is smaller than the outer diameter of the roller. After the two roller seats 2 approach each other to a predetermined position, in this embodiment, the support member 22 supports the roller body 5, which means that after the support member 22 moves into place, it supports the outer periphery of the circular bosses 51, ensuring that the brush strips of the lower brush roller are not deformed by the pressure of the support member 22.

[0057] Furthermore, such as Figure 13-14 As shown, to ensure the lower brush roller remains stable when it disengages from the sliding seat 14 and the fixed seat 15, in step S1, the support member 22 is provided with an outwardly open support groove. The support groove includes a support surface 221 for supporting the lower brush roller and an abutment surface 222 perpendicular to the support surface 221. To further fit the circular boss 51 of the roller body 5, the support surface 221 is an arc-shaped surface. In step S3, when the two roller assemblies support the lower brush roller, the abutment surfaces 222 on the left and right sides abut against the two end faces of the lower brush roller respectively to prevent the lower brush roller from moving left and right when it disengages from the sliding seat 14 and the fixed seat 15, and to ensure that the unloading process is stable. Here, the two end faces of the lower brush roller refer to the outer end faces of the two circular bosses 51. When the two limiting surfaces 222 are in contact with the outer end faces of the two circular bosses 51 respectively, the support member 22 can effectively prevent the lower brush roller from moving laterally.

[0058] Furthermore, the limiting surface 222 on the support member 22 has a small area, and there are only two support members 22 on each roller seat 2. The two limiting surfaces 222 of the two support members 22 can only form two limiting points on the outer end face of the roller body 5. Therefore, in order to increase the stability of the roller body 5, the inner side of the support part 24 is provided with a contact plate for contacting the end face of the lower brush roller. The contact plate is provided with a contact surface 242. The contact surface 242 and the limiting surface 222 are on the same vertical plane to increase the contact area of ​​the roller seat 2 on the end of the roller body 5 and form four limiting points on the end of the roller body 5, so that the roller body 5 remains axially stable between the two roller seats 2.

[0059] Furthermore, to replace lower brush rollers of different lengths, in step S1, to ensure sufficient linkage force between the two roller seats 2, a linkage cylinder 21 is provided between the two roller seats 2. The linkage cylinder 21 can move the two roller seats 2 away from each other to replace lower brush rollers of different lengths. The linkage cylinder 21 includes a cylinder body connected to the two roller seats 2 respectively and a telescopic rod that moves within the cylinder body. In step S3, the piston rod extends and retracts, bringing the two roller seats 2 closer to each other to a predetermined position. There are two linkage cylinders 21. The roller seat 2 includes a horizontal plate 25 that is horizontally slidably connected to the lower end of the frame 1. Two support seats 24 are located at the lower end of the horizontal plate 25. A mounting plate 26 is provided between the horizontal plate 25 and each support seat 24. In step S3, the piston rod and cylinder body of each cylinder 21 are respectively hinged to each of the two left and right opposite mounting plates 26, so that the front and rear ends of the two roller seats 2 move closer to each other at the same time. The hinge design can prevent the linkage cylinder 21 from jamming when it operates.

[0060] Furthermore, the structure of the roller seat 2 is as follows: the roller seat 2 includes a horizontally slidably connected horizontal plate 25 at the lower end of the frame 1, two support parts 24 connected to the lower end of the horizontal plate 25, and a mounting plate 26 between the horizontal plate 25 and each support part 24; the mounting plate 26 is both the carrier for mounting the linkage cylinder 21 and also serves to strengthen the connection between the horizontal plate 25 and the support part 24; in this embodiment, there are two linkage cylinders 21, and the piston rod and cylinder body of each linkage cylinder 21 are respectively hinged to each of the two left-right opposite mounting plates 26, so that the roller... The front and rear ends of seat 2 can move synchronously; two connecting ears are provided at the head end of the piston rod and the tail end of the cylinder. The width between the two connecting ears is greater than the thickness of the mounting plate 26. To ensure that the hinge is in place, a fixing plate 261 is connected to the mounting plate 26. Hinging holes are machined on both the mounting plate 26 and the fixing plate 261. The fixing plate 261 can increase the thickness of the mounting plate 26 to make up for the gap between the mounting plate 26 and the connecting ears, so that after the linkage cylinder 21 is hinged in place, the linkage cylinder 21 remains stable in the front and rear directions.

[0061] Furthermore, to ensure the structural strength of the roller seat 2, the roller seat 2 is a welded structural component, wherein the lower end of the horizontal plate 25 is provided with a support, and the middle position of the lower end of the support is recessed inward, thereby forming two support parts 24 and a clearance groove 241 located between the two support parts 24; to ensure the lightweight of the roller seat 2, the support is a hollow structure, including at least two vertical plates 243 spaced apart from each other and welded to the lower end of the horizontal plate 25, the middle position of the lower end of the two vertical plates 243 is recessed inward, thereby forming two support parts 24 and a clearance groove 241 located between the two support parts 24; a connecting plate 244 is fixedly installed between every two adjacent vertical plates 243, and the connecting plate 244 and the two vertical plates 243 form the hollow structure of the support.

[0062] Furthermore, the linkage cylinder 21 is not only a linkage component that moves the two roller seats 2 closer or further apart, but also a connecting component between the two roller seats 2; the roller seat assembly as a whole can slide on the frame 1, and the two roller seats 2 are connected by the linkage cylinder 21 to form a synchronously movable roller seat assembly; specifically, the frame 1 is provided with two guide rails spaced apart front and rear, and the upper end of the horizontal plate 25 of the roller seat 2 is equipped with a corresponding connecting seat 251, and a sliding sleeve is installed on the connecting seat 251, which is slidably connected to the corresponding guide rail; in order to adjust the position of the two roller seats 2 at any time, so that the two roller seats 2 are symmetrical about left and right with the lower brush roller as the reference when changing rollers, and to ensure that the two roller support assemblies can simultaneously support the circular protrusions 51 at both ends of the roller, such as Figure 12 As shown, in step S1, a positioning adjustment assembly is provided between the frame 1 and the roller seat assembly. The positioning adjustment assembly includes an adjustment rack 231 and an adjustment gear 232 respectively installed on the frame 1 and the roller seat assembly. A control rod is installed on the adjustment gear 232, and a rotating shaft sleeve 252 is installed on the corresponding roller seat 2. The control rod is located inside the rotating shaft sleeve 252, and both ends of the control rod protrude outside the rotating shaft sleeve 252. One end of the control rod is connected to the adjustment gear 252, and a control handwheel 23 exposed on the frame 1 is installed on the outer end of the control rod. In step S2, the control handwheel 23 is rotated to drive the two roller seats 2 to move synchronously in the left and right directions and stop at the corresponding positions, so that the two roller seats 2 are symmetrical about the left and right with the lower brush roller as the reference; to avoid the phenomenon that one end of the roller body 55 is supported and the other end is not supported.

[0063] Furthermore, the connection between the two roller seats 2 via the linkage cylinder 21 to form a synchronously movable roller seat assembly makes the lower brush roller more stable when it detaches from the fixed seat 15. In step S1, in order to allow the other end of the lower brush roller to quickly detach from the fixed seat 15 after the sliding seat 14 detaches from one end of the lower brush roller, a pushing cylinder 3 is provided on the roller seat 2 on the same side as the fixed seat 15. In step S3, after the sliding seat 14 detaches from the roller shaft at one end of the lower brush roller, the piston rod of the pushing cylinder 3 extends and acts on the fixed seat 15, causing the roller seat assembly and the lower brush roller to move away from the fixed seat 15, so that the fixed seat 15 detaches from the roller shaft at the other end of the lower brush roller. The pushing cylinder 3 makes the lower brush roller detach from the fixed seat 15 without manual operation, further improving the roller unloading efficiency.

[0064] Furthermore, in step S1, the frame 1 is also provided with a lifting adjustment mechanism 4. The lifting adjustment mechanism 4 includes a drive assembly and an eccentric adjustment assembly 43 symmetrically arranged on the frame 1. The eccentric adjustment assembly 43 includes a lifting assembly and a transmission assembly. The transmission assembly includes a set of front-to-back opposing transmission wheels 432 arranged on the frame 1. The lifting assembly includes a lifting member 434 and a set of connecting rods 433 arranged between the lifting member 434 and the two front-to-back opposing transmission wheels 432. The lifting member 434 is a vertical plate-like structure. The lower end of each connecting rod 433 is hinged to the lifting member 434, and the upper end of the connecting rod 433 forms an eccentric rotational connection with the corresponding transmission wheel 432. Figure 16 As shown, ideally, after the two opposing support members 22 move into position with the roller seat 2, the support members 22 should be aligned with the roller body 5 and closely adhere to the outer periphery of the circular boss 51. However, due to error, the position of the support members 22 is difficult to guarantee absolute accuracy. Therefore, to avoid interference between the support members 22 and the roller body 5 of the lower brush roller when they move, in step S3, when the two roller seats 2 approach each other to a predetermined position, a preset gap s is formed between the support members 22 and the roller body 5 of the lower brush roller. This preset gap s can prevent the support members 22 from colliding and interfering with the circular boss 51 after they move into position. However, the preset gap s makes it difficult for the support members 22 to contact the circular boss 51 on the roller body 5. 1. Therefore, the lifting adjustment mechanism 4 is needed to eliminate the preset gap s. Specifically, at this time, the drive assembly can drive two sets of left and right opposite transmission wheels 432 to rotate synchronously at a predetermined angle, so that the two lifting parts 434 act downward on the bearing seat 1a and lift the frame 1 to a predetermined height, thereby eliminating the preset gap s between the support part 22 and the roller body 5. The drive assembly can drive the lifting part 434 to act on the bearing seat 1a through the eccentric adjustment assembly, thereby forming an upward reaction force on the frame 1 and raising the frame 1 to a predetermined height. The predetermined height is greater than the size of the preset gap s. After eliminating the preset gap s, the support part 22 can closely adhere to the outer periphery of the circular boss 51 and support the roller body 5.

[0065] Furthermore, to make the downward movement of the lifting component 434 more stable and smooth, a lifting guide assembly is provided between the frame 1 and the lifting component 434. The lifting guide assembly includes two front-to-back guide blocks set on the frame 1, and guide plates 435 set at the front and rear ends of the lifting component 434. The guide plates 435 are made of plastic. The two guides form a guide groove, and the two guide plates 435 contact the corresponding inner walls of the guide groove and can move up and down to guide the lifting component 434.

[0066] Furthermore, the drive assembly needs to simultaneously drive the two sets of front-to-back opposing transmission wheels 432 in the two eccentric adjustment assemblies to rotate simultaneously. To meet this requirement, the transmission wheel 432 in this embodiment is a transmission gear. The drive assembly includes a drive shaft 41 and two drive gears 431, with a linkage rod 439 connecting the two drive gears 431. The corresponding drive gear 431 meshes with each pair of front-to-back opposing transmission gears simultaneously. The drive shaft 41 is directly or indirectly connected to one of the drive gears 431. An adjustment handwheel 411 is connected to the outer end of the drive shaft 41. In step S3, the adjustment handwheel 411 is rotated to make the multiple transmission wheels 432 rotate synchronously at a predetermined angle and stop at the corresponding position to eliminate the preset gap s between the support member 22 and the roller body 5.

[0067] Furthermore, ideally, the drive shaft 41 could be directly connected to one of the drive gears 431. However, to prevent the lifting component 434 from accidentally resetting upwards and causing the preset gap s to reappear, in this embodiment, the drive shaft 41 acts indirectly on one of the drive gears 431. Specifically, a self-locking transmission component is provided between the drive shaft 41 and the corresponding drive gear 431. The self-locking transmission component is a worm gear transmission box 42, which has an input end and an output end. An output shaft 438 is provided at the output end. The drive shaft 41 is connected to the input end of the worm gear transmission box 42, and the corresponding drive gear 431 is connected to the worm gear transmission box 42. The output shaft 438 of the gearbox 42 is connected; the worm gear transmission box 42 has a worm wheel and worm connected for transmission, and its specific structure is similar to that in the worm gear reducer, which is existing technology and will not be described in detail here; the drive shaft 41 is connected to the input end of the worm gear transmission box 42, and the corresponding drive gear 431 is connected to the output end of the worm gear transmission box 42; in step S3, after the drive gear 431 rotates to the position, due to the self-locking characteristic of the worm gear, the worm gear transmission box 42 restricts the drive gear 431 from rotating in the opposite direction, so that the two transmission wheels 432 stop at the predetermined position; preventing the lifting component 434 from retracting upward due to the reverse rotation of the transmission wheel 432.

[0068] Furthermore, a common structure for the transmission connection between the transmission wheel 432 and the connecting rod 433 is to have an eccentric through hole in the transmission wheel 432, and then hinge the connecting rod 433 to the position of the eccentric through hole via a rotating shaft. However, this structure leads to uneven stress distribution throughout the transmission wheel 432, which will affect the structural strength and service life of the transmission wheel 432 in the long run. Therefore, in order to reduce maintenance costs, this embodiment improves the structure of the eccentric rotation connection. The upper end of the connecting rod 433 is provided with a rotating shaft hole, and an eccentric assembly is installed in the rotating shaft hole. The eccentric assembly includes a transmission shaft 432a and an eccentric sleeve 436. The eccentric sleeve 436 is made of metal or plastic. The 6 is provided with an eccentric hole 4361 that is not concentric with the shaft hole. One end of the transmission shaft 432a is connected to the transmission wheel 432 for transmission, and the other end of the transmission shaft 432a passes through the eccentric hole 4361 and is circumferentially fixed with the eccentric sleeve 436. In step S3, the transmission wheel 432 rotates to drive the lifting component 434 to act downward on the bearing seat 1a. The eccentric sleeve 436 can rely on the rotation of the transmission wheel 432 to form an eccentric drive on the connecting rod 433. It is not necessary to open an eccentric through hole on the transmission wheel 432, which ensures that the stress distribution of the transmission wheel 432 is uniform. While driving the lifting component 434 to move downward, it reduces the probability of damage to the transmission wheel 432 and the maintenance cost.

[0069] Furthermore, an eccentricity is formed between the center of the eccentric hole 4361 and the center of the rotating shaft hole. Considering the variation in the outer diameter of the roller body 51 of different specifications of the lower brush roller, the eccentricity range in this embodiment is 3mm-12mm. To facilitate determining whether the preset gap s has been eliminated, the eccentricity in this embodiment is equal to half of the predetermined height. The predetermined angle of synchronous rotation of multiple transmission wheels 432 is 180 degrees. In the initial state, the center of the rotating shaft hole is located directly above the center of the central hole 432b. When multiple transmission wheels... When wheel 432 rotates 180 degrees synchronously, the center of the shaft hole moves directly below the center of the center hole 432b. The center of the shaft hole moves vertically by twice the eccentricity, which is the same as the predetermined height and also the same as the width of the preset gap s. For example, when the width of the preset gap s is 10mm and the eccentricity is 5mm, the center of the shaft hole of connecting rod 433 is located at the top of the center hole in the initial state. At this time, controlling the transmission wheel 432 to rotate 180° will eliminate the preset gap s.

[0070] Furthermore, this design also ensures that the lower brush roller shaft will not deform. Specifically, after the preset gap s is eliminated, the supporting surface 221 of the support member 22 has contacted the circular boss 51 of the roller body 5. However, if the eccentricity is greater than the width of the preset gap s, and the operator accidentally exceeds the predetermined angle when rotating the control handwheel 41, it will exert an upward force on the roller body 5, causing the roller shaft stuck in the sliding seat 14 and the fixed seat 15 to deform. For example, when the width of the preset gap s is 10mm and the size of the eccentricity is also 10mm, it is only necessary to rotate the entire transmission wheel 432 by 90° to eliminate the preset gap s. When the operator accidentally rotates the transmission wheel 432 by more than 90°, the lifting member 434 will still... The roller will continue to move downwards and press against the support seat 1a, causing slight deformation of the roller shaft and affecting the service life of the lower brush roller. However, this situation will not occur when using the eccentricity in this embodiment. In this embodiment, when the preset gap s is eliminated, the center of the rotating shaft hole is already located at the bottom of the center of the central hole. When the angle of synchronous rotation of multiple transmission wheels 432 is greater than 180 degrees, the center of the rotating shaft hole rotates around the center of the central hole 432b and moves closer to the initial position, driving the two lifting parts 434 that have been extended downwards to reset upwards. Even if the rotation angle of the transmission wheel 432 is mistakenly made to exceed 180 degrees, it will not cause the support part 22 to exert excessive force on the roller body 5, thus ensuring the structural strength and service life of the lower brush roller.

[0071] Furthermore, to facilitate operator confirmation of whether the preset gap s has been eliminated, such as... Figure 10 As shown, one of the drive shafts 432a has a pointer 412 exposed on the frame 1 at its outer end. The frame 1 is provided with a scale 413 corresponding to the position of the pointer 412. The scale 413 has multiple scale values ​​evenly distributed along the circumference. The scale values ​​are usually angle values. For example, when the width of the preset gap s is 10mm and the size of the eccentricity is 5mm, an angle value of 0-180° can be set on the scale 413. In step S3, after the drive shaft 432a rotates to the corresponding angle and stops at the corresponding position, the range of change of the scale value of the pointer 412 on the scale 413 is visually observed, that is, whether the pointer 412 has rotated 180°, to confirm that the preset gap s between the support 22 and the roller 5 has been eliminated.

[0072] Furthermore, the eccentric hole 4361 and the drive shaft 432a, and the center hole and the drive shaft 432a are connected by keys to keep the drive wheel 432 and the eccentric sleeve circumferentially fixed to the drive shaft 432a; the key connection can be a flat key connection or a spline connection.

[0073] Furthermore, such as Figure 9As shown, ideally, the drive shaft 432a should always be concentric with the eccentric hole 4361 when it rotates. However, due to manufacturing and installation errors, the drive shaft 432a will have a slight relative displacement with the eccentric hole 4361 in the lateral direction when it rotates, which is called misalignment. To avoid the misalignment from causing a lateral force on the connecting rod 433 and affecting the smoothness of the connecting rod 433's movement, a spherical bearing 437 is installed in the shaft hole of the rotating shaft. The spherical bearing 437 is fitted on the outer wall of the eccentric sleeve 436. The contact surface between the inner and outer rings of the spherical bearing 437 is spherical. The inner ring is fitted on the outer wall of the eccentric sleeve 436. While ensuring that the drive shaft 432a rotates smoothly in the circumferential direction, the connecting rod 433 is allowed to swing relative to the drive shaft 432a in the lateral direction, thus avoiding excessive lateral force on the connecting rod 433.

[0074] Furthermore, the connecting rod 433 has end caps at both ends of the shaft hole to seal the shaft hole, ensuring that the components inside the shaft hole are isolated from the outside. At the same time, the end caps can also restrict the movement of the spherical bearing 437. Specifically, the outer wall of the eccentric sleeve 436 has two retaining ring grooves 4362 corresponding to the positions of the two ends of the spherical bearing 437. The retaining rings are installed in the retaining ring grooves 4362, and the two retaining rings are respectively abutted by the two end caps to restrict the axial movement of the spherical bearing 437.

[0075] Furthermore, the eccentric sleeve 436, where the spherical bearing 437 is located, also has an annular groove 4363. The annular groove 4363 can accommodate lubricant, making the rotation of the drive shaft 432a smoother. It can also serve as an installation mark, allowing the spherical bearing 437 to be quickly installed in place.

[0076] Furthermore, such as Figure 6-7 As shown, the linkage cylinder 21 and the push cylinder 3 require hydraulic oil to drive them during operation. Therefore, the frame 1 in this embodiment is a frame structure. The frame structure is equipped with a hydraulic station 18 that is connected to both the linkage cylinder 21 and the push cylinder 3 through hydraulic oil pipes. The hydraulic station 18 can output hydraulic oil to drive the linkage cylinder 21 and the push cylinder 3. The hydraulic station 18 is an existing hydraulic component, and its specific principle will not be described in detail. The frame structure has multiple connected windows on its four side walls and upper and lower end faces. The windows on the upper end face and four side walls are connected and sealed by cover plates. The hydraulic oil pipes can pass through the lower end windows near the linkage cylinder 21 and the push cylinder 3 and connect to the hydraulic station 18.

[0077] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A method for replacing a lower brush roller, characterized in that, Includes the following steps: S1: Pre-installed unloading roller module; The unloading roller module includes a frame (1) for use with flexible sling hoisting, and two left-right symmetrical roller seats (2) are slidably connected at the lower end of the frame (1); The roller seat (2) includes two front-to-back, downwardly extending support seats (24), and a support member (22) is connected to the inner side of the support seat (24); and a clearance area (241) with an open lower end is formed between the two support seats (24) for avoiding the roller shaft; The frame (1) is also provided with a lifting adjustment mechanism (4), which includes a drive assembly and left-right symmetrical arrangement. An eccentric adjustment assembly (43) is mounted on the frame (1). The eccentric adjustment assembly (43) includes a lifting assembly and a transmission assembly. The transmission assembly includes a set of front-to-back opposing transmission wheels (432) mounted on the frame (1). The lifting assembly includes a lifting member (434) and a set of connecting rods (433) mounted between the lifting member (434) and the two front-to-back opposing transmission wheels (432). The lower end of each connecting rod (433) is hinged to the lifting member (434), and the upper end of the connecting rod (433) forms an eccentric rotational connection with the corresponding transmission wheel (432). S2; The unloading roller module is hoisted to the upper end of the support seat (1a); The support seat (1a) has a sliding seat (14) and a fixed seat (15) respectively clamped at both ends of the lower brush roller. The flexible sling is connected to the frame (1) and the entire unloading roller module is hoisted. Then the entire unloading roller module is placed horizontally at the corresponding position on the upper end of the support seat (1a) and the two clearance areas (241) are respectively aligned with the roller shaft positions at both ends of the lower brush roller. S3: Unload the roller; control the two roller seats (2) to move closer to each other, and move the two sets of front and rear opposite support members (22) to the predetermined position to support the roller body (5) of the lower brush roller. Then, make the sliding seat (14) slide away from the lower brush roller and disengage from the roller shaft at one end of the lower brush roller. Then control the two roller seats (2) and the lower brush roller to slide away from the fixed seat (15) so that the fixed seat (15) disengages from the roller shaft at the other end of the lower brush roller. When the two roller seats (2) move closer to each other to the predetermined position, a preset gap (s) is formed between the support member (22) and the roller body (5) of the lower brush roller. At this time, the drive assembly can drive the two sets of left and right opposite transmission wheels (432) to rotate synchronously at a predetermined angle, so that the two lifting members (434) act downward on the support seat (1a) and lift the frame (1) to the predetermined height to eliminate the preset gap (s) between the support member (22) and the roller body (5). S4: Lift off the unloading roller module; Use flexible slings to lift the entire unloading roller module and the lower brush roller off the upper end of the support (1a), thereby removing the lower brush roller from the support (1a).

2. The method for replacing a lower brush roller according to claim 1, characterized in that: In step S1, the frame (1) is provided with a hoisting and leveling assembly, which includes a first hoisting lug (11) and a second hoisting lug (12) that are horizontally opposite each other. The first hoisting lug (11) is provided with a single first hoisting hole (13), and the second hoisting lug (12) is provided with multiple horizontally spaced second hoisting holes (13a). In step S2, one end of the flexible sling is hoisted in the first hoisting hole (13), and the other end of the flexible sling is hoisted on one of the multiple second hoisting holes (13a), so that the hoisted unloading roller module is kept horizontal.

3. The method for replacing a lower brush roller according to claim 1, characterized in that: In step S1, the support member (22) is provided with an outwardly open support groove. The support groove includes a support surface (221) for supporting the lower brush roller and an abutment surface (222) perpendicular to the support surface (221). In step S3, when the two roller assemblies support the lower brush roller, the abutment surfaces (222) on the left and right sides abut against the two end faces of the lower brush roller respectively to prevent the lower brush roller from moving left and right when it is separated from the sliding seat (14) and the fixed seat (15).

4. The method for replacing the lower brush roller according to claim 1, characterized in that: In step S1, a linkage cylinder (21) is provided between the two roller seats (2). The linkage cylinder (21) includes a cylinder body connected to the two roller seats (2) respectively and a telescopic rod that moves within the cylinder body. In step S3, the piston rod extends and retracts, so that the two roller seats (2) move closer to each other to a predetermined position.

5. A method for replacing a lower brush roller according to claim 4, characterized in that: There are two linkage cylinders (21). The roller seat (2) includes a horizontal plate (25) that is horizontally slidably connected to the lower end of the frame (1). Two support seats (24) are located at the lower end of the horizontal plate (25). An mounting plate (26) is provided between the horizontal plate (25) and each support seat (24). In step S3, the piston rod and cylinder body of each cylinder (21) are respectively hinged to each of the two left and right opposite mounting plates (26), so that the front and rear ends of the two roller seats (2) approach each other at the same time.

6. The method for replacing a lower brush roller according to claim 1, characterized in that: The two roller seats (2) are connected by a linkage cylinder (21) to form a synchronously movable roller seat assembly. In step S1, a positioning adjustment assembly is provided between the frame (1) and the roller seat assembly. The positioning adjustment assembly includes an adjustment rack (231) and an adjustment gear (232) respectively set on the frame (1) and the roller seat assembly. A control rod is installed on the adjustment gear (232), and a control handwheel (23) exposed on the frame (1) is installed on the outer end of the control rod. In step S2, the control handwheel (23) is rotated and the two roller seats (2) are driven to move synchronously in the left and right directions and then stop at the corresponding positions so that the two roller seats (2) are symmetrical about the left and right with the brush roller below as the reference.

7. The method for replacing a lower brush roller according to claim 1, characterized in that: The two roller seats (2) are connected by a linkage cylinder (21) to form a roller seat assembly that can move synchronously; in step S1, a push cylinder (3) is provided on the roller seat (2) on the same side as the fixed seat (15); in step S3, the sliding seat (14) first disengages from the roller shaft at one end of the lower brush roller, and then the piston rod of the push cylinder (3) extends and acts on the fixed seat (15), so that the roller seat assembly and the lower brush roller move away from the fixed seat (15), so that the fixed seat (15) disengages from the roller shaft at the other end of the lower brush roller.

8. A method for replacing a lower brush roller according to claim 1, characterized in that: The transmission wheel (432) is a transmission gear. The drive assembly includes a drive shaft (41) and two drive gears (431). A linkage rod (439) is connected between the two drive gears (431). The corresponding drive gear (431) meshes with each of the two front and rear opposite transmission gears at the same time. The drive shaft (41) is directly or indirectly connected to one of the drive gears (431). An adjusting handwheel (411) is connected to the outer end of the drive shaft (41). In step S3, the adjusting handwheel (411) is rotated so that the multiple transmission wheels (432) rotate synchronously at a predetermined angle and stop at the corresponding position to eliminate the preset gap (s) between the support (22) and the roller (5).

9. A method for replacing a lower brush roller according to claim 8, characterized in that: A self-locking transmission component is provided between the drive shaft (41) and the corresponding drive gear (431). The self-locking transmission component is a worm gear transmission box (42). The drive shaft (41) is connected to the input end of the worm gear transmission box (42), and the corresponding drive gear (431) is connected to the output end of the worm gear transmission box (42). In step S3, after the drive gear (431) rotates to the position, the worm gear transmission box (42) restricts the drive gear (431) from rotating in the opposite direction, so that the two transmission wheels (432) stop at the predetermined position.

10. A method for replacing a lower brush roller according to claim 1, characterized in that: The upper end of the connecting rod (433) is provided with a shaft hole, and an eccentric component is installed in the shaft hole. The eccentric component includes a drive shaft (432a) and an eccentric sleeve (436). The eccentric sleeve (436) is provided with an eccentric hole (4361) that is not concentric with the shaft hole. One end of the drive shaft (432a) is connected to the drive wheel (432) for transmission, and the other end of the drive shaft (432a) passes through the eccentric hole (4361) and is circumferentially fixed with the eccentric sleeve (436). In step S3, the drive wheel (432) rotates to drive the lifting component (434) to act downward on the bearing seat (1a).

11. A method for replacing a lower brush roller according to claim 10, characterized in that: One of the drive shafts (432a) has a pointer (412) exposed on the frame (1) at its outer end. The frame (1) is provided with a scale (413) corresponding to the position of the pointer (412). Multiple scale values ​​are evenly distributed on the scale (413) along the circumference. In step S3, after the drive shaft (432a) rotates to the corresponding angle and stops at the corresponding position, the range of change of the scale value of the pointer (412) on the scale (413) is visually observed to confirm that the preset gap (s) between the support (22) and the roller (5) has been eliminated.

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