Self-adaptive hoisting roll changing mechanism

Abstract

The utility model discloses a self-adaptive hoisting roll changing mechanism which comprises a rack used for being hoisted and placed at the upper end of a bearing seat with a lower brush roll, a self-adaptive guide assembly and a roll seat assembly are arranged at the lower end of the rack, and the roll seat assembly comprises two roll seats which are in bilateral symmetry and slidably connected to the lower end of the rack; the roller base comprises two supporting parts which are opposite in the front-back direction and extend downwards, and bearing blocks used for bearing a roller body of the lower brush roller are arranged on the inner sides of the supporting parts. The two bearing blocks opposite to each other in the front-back direction on each roller seat form a carrier roller assembly; the self-adaptive guiding assembly comprises a front-back guiding assembly and a left-right guiding assembly which are used for being matched with the bearing base. The front-back guide assembly and the left-right guide assembly extend out of the lower end of the rack downwards; when the rack is hoisted, after the self-adaptive guide assembly is matched with the bearing seat, the whole rack can be hoisted to a preset position at the upper end of the bearing seat, the carrier roller assemblies on the two roller seats are kept in place at the left end and the right end of the lower brush roller, the roller seats are prevented from deviating from the preset position, and the roller replacing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of strip grinding, and in particular to an adaptive hoisting roller changing mechanism. 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 application requirements. During the period between the strip entering the processing plant and being cut, the surface material of the strip is prone to peeling or corrosion. To remove the rust layer, the strip needs to be polished using upper and lower brush rollers installed in a steel plate grinding and brushing equipment. Both upper and lower brush rollers include a roller body and roller shafts located at both ends of the roller body. After prolonged polishing, the polishing effect of the brush rollers will decrease, thus requiring replacement.

[0003] When replacing the upper brush roller, the roller changing trolley can be driven into the brush grinding equipment. However, the lower brush roller can usually only be replaced manually. For example, in the oxide scale treatment device with announcement number CN216371592, the oxide scale treatment device includes a movable support for setting the lower brush roller. The support is equipped with two bearing seats, one of which is slidable and the other is fixed. The two bearing seats can be regarded as a sliding seat and a fixed seat respectively. The roller shafts at both ends of the lower brush roller are respectively inserted into the sliding seat and the fixed seat. When the roller needs to be replaced, the support needs to be moved out of the equipment and the lower brush roller needs to be replaced manually, so that the sliding seat and the fixed seat are disengaged from the roller shafts at both ends of the roller body. This roller replacement method is difficult, inefficient, and prone to safety hazards.

[0004] To improve roller changing efficiency, the applicant envisioned a mechanism for lifting and changing rollers from above the lower brush roller, including a frame for placing on a support base, and two left-right sliding roller seats to support the lower brush roller body at the lower end of the frame. However, when using a lifting device to lift the frame, the frame and roller seats are prone to swaying in the front-back or left-right directions, making it difficult to place the frame in the predetermined position on the support base, and making it difficult to align the two roller seats with the two ends of the lower brush roller. Summary of the Invention

[0005] This utility model provides an adaptive hoisting roller changing mechanism. By setting adaptive guide components extending beyond the lower end of the frame on both the left and right sides of the frame, the entire frame can be hoisted to a predetermined position on the upper end of the support seat after the adaptive guide components cooperate with the support seat. This keeps the roller assemblies on the two roller seats in place at the left and right ends of the lower brush roller, preventing the roller seats from deviating from the predetermined position and improving the roller changing efficiency.

[0006] The technical solution of this utility model is implemented as follows:

[0007] An adaptive hoisting roller changing mechanism, comprising:

[0008] The frame is used for hoisting and placing on the upper end of the support seat with the lower brush roller;

[0009] The roller seat assembly includes two left-right symmetrical roller seats that are slidably connected to the lower end of the frame; the roller seat includes two front-to-back opposing and downwardly extending support parts, and the inner side of the support parts is provided with a support block for supporting the roller body of the lower brush roller; the two front-to-back opposing support blocks on each roller seat constitute the idler roller assembly.

[0010] An adaptive guidance assembly, mounted on the frame, includes front and rear guidance assemblies and left and right guidance assemblies for cooperating with the carrier; both the front and rear guidance assemblies and the left and right guidance assemblies extend downward beyond the lower end of the frame;

[0011] When the frame is hoisted and placed on the upper end of the support, the front and rear guide components and the left and right guide components can cooperate with the support and guide the position of the frame and the roller seat components, so that the two idler roller components are kept in place at both ends of the lower brush roller.

[0012] Preferably, the frame is a frame structure, and the upper end of the frame is connected to a lifting assembly. The lifting assembly includes a first lifting lug and a second lifting lug that cooperate with the lifting device and are horizontally opposite each other, so as to facilitate the lifting device to lift.

[0013] Preferably, the first lifting lug is provided with a single first lifting hole for engaging with one end of the lifting device, and the second lifting lug is provided with a leveling structure, which includes multiple horizontally spaced second lifting holes for engaging with the other end of the lifting device; so that the other end of the lifting device can be switched among the multiple second lifting holes until the frame is kept level.

[0014] As a preferred option, the frame structure is composed of multiple crossbeams and longitudinal beams, which together form multiple windows around the frame and at the top. The empty windows are connected with sealing plates. The frame structure has high strength, and the sealing plates at the empty windows can prevent debris from entering the frame.

[0015] Preferably, the front and rear guide assembly includes two sets of front and rear opposing swing seats, which can swing elastically in the front and rear direction; the two sets of swing seats are located on the left and right sides of the frame respectively, and the swing seats are equipped with rotating guide wheels. The front and rear sides of the bearing seat are respectively equipped with guide plates for cooperating with the guide wheels; the guide wheels cooperate with the guide plates to make the entire roller changing mechanism cooperate with the bearing seat in the front and rear direction.

[0016] Preferably, the swing seat is provided with a mounting plate located below the guide wheel, and the mounting plate is provided with a buffer pad for contact with the ground; so that the roller changing mechanism can be placed on the ground when not in operation, without worrying about the guide wheel wearing out due to contact with the ground.

[0017] Preferably, the left and right guide assembly includes two front-to-back guide seats disposed on the left or right side of the lower end of the frame. The guide seats are provided with inverted Y-shaped guide grooves, and the Y-shaped guide grooves have two guide ramps. The bearing seat is provided with a rotating guide post at the corresponding position for cooperating with the guide ramps. The guide seats cooperate with the rotating guide posts to enable the roller changing mechanism to cooperate with the bearing seat in the left and right directions.

[0018] Preferably, each set of front and rear opposing swing seats is pre-connected to a support frame, which is connected to the left or right side of the lower end of the frame; this allows the front and rear guide components to be installed to the lower end of the frame at one time, saving assembly time.

[0019] Preferably, a clearance groove with an open lower end is formed between the two support parts; when the two roller assemblies are respectively held in place at both ends of the lower brush roller, the two clearance grooves correspond to the roller shaft positions at both ends of the lower brush roller; to prevent interference between the roller shaft and the roller seat.

[0020] The beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0021] This invention provides front and rear guide components and left and right guide components on the left and right sides of the lower end of the frame to cooperate with the support seat. When the frame is hoisted to the upper end of the support seat, the support components on the two roller seats can be kept in place at the left and right ends of the lower brush roller, avoiding the positional displacement caused by the swaying of the frame during hoisting, and improving the accuracy and efficiency of the lower brush roller replacement. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the adaptive hoisting roller changing mechanism;

[0023] Figure 2 This is a schematic diagram of the adaptive hoisting roller changing mechanism from another angle;

[0024] Figure 3 A cross-sectional view of the roller body supporting the lower brush roller, with two opposing front and rear support blocks.

[0025] Figure 4 A schematic diagram showing the adaptive hoisting roller changing mechanism placed on top of the support.

[0026] Figure 5 This 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.

[0027] 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;

[0028] Figure 7 The structural diagram of the clearance elimination mechanism is shown after the frame is hidden.

[0029] Figure 8 A cross-sectional view of the backlash elimination mechanism;

[0030] Figure 9 This is an enlarged sectional view of the position where the upper end of the connecting rod mates with the drive shaft;

[0031] Figure 10 An enlarged view of the pointer and dial on the frame;

[0032] Figure 11 This is a schematic diagram of the eccentric sleeve structure;

[0033] Figure 12 This is a schematic diagram of the positioning adjustment component;

[0034] Figure 13 A structural diagram showing how two roller supports hold up the lower brush roller;

[0035] Figure 14 This is a schematic diagram of the roller holder structure;

[0036] Figure 15 A simplified diagram illustrating the principle of the adaptive hoisting roller changing mechanism for changing rollers at the upper end of the support.

[0037] Figure 16 A comparison diagram showing the presence of the preset gap and the elimination of the preset gap;

[0038] Figure 17 This is a front view of the adaptive hoisting roller changing mechanism;

[0039] The attached figures are labeled as follows: 1-Frame, 1a-Bearing seat, 2-Roller seat, 3-Pushing cylinder, 4-Gap elimination 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 block, 23-Control handwheel, 24-Support part, 25-Horizontal plate, 26-Longitudinal plate, 27-Reinforcing plate, 41-Drive shaft, 42-Worm gear transmission box, 43-Eccentric adjustment assembly, 171-Buffer pad, 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 plate, 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

[0040] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model 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.

[0041] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0042] like Figure 1-17 As shown, the specific embodiments of this utility model are as follows:

[0043] This embodiment provides an adaptive lifting roller changing mechanism, which is used on a support assembly for clamping a lower brush roller. The support assembly includes a support seat 1a and a sliding seat 14 and a fixed seat 15 disposed on the support seat 1a and used to clamp the roller shafts at both ends of the lower brush roller. The sliding seat 14 can slide along the length direction of the lower brush roller. The sliding seat 14 and the fixed seat 15 are disposed in a box with an opening on one side of the support seat 1a.

[0044] The adaptive hoisting roller changing mechanism includes:

[0045] The frame 1 is used for hoisting and placing on the upper end of the support seat 1a with the lower brush roller; in this embodiment, the frame 1 is placed on the upper end of the box.

[0046] The roller seat assembly includes two left-right symmetrical roller seats 2 slidably connected to the lower end of the frame 1; the roller seat 2 includes two front-to-back opposing and downwardly extending support parts 24, and the inner side of the support parts 24 is provided with support blocks 22 for supporting the roller body 5 of the lower brush roller; the two front-to-back opposing support blocks 22 on each roller seat 2 constitute the roller support assembly.

[0047] An adaptive guidance assembly is mounted on the frame 1 and includes a front and rear guidance assembly and a left and right guidance assembly for cooperating with the support 1a; both the front and rear guidance assembly and the left and right guidance assembly extend downward beyond the lower end of the frame 1.

[0048] When the frame 1 is hoisted and placed on the upper end of the support seat 1a, the front and rear guide components and the left and right guide components can cooperate with the support seat 1a and guide the position of the frame 1 and the roller seat assembly, so that the two roller assemblies are respectively kept in place at both ends of the lower brush roller.

[0049] Furthermore, a telescopic linkage is connected between the two roller seats 2, which can move the two roller seats closer to each other or further away by its own telescopic movement. When unloading the roller, the telescopic linkage drives the two roller seats 2 to move away from each other so that the positions of the two clearance grooves 241 correspond to the roller shafts at both ends of the corresponding lower brush roller. Then, the telescopic linkage drives the two roller seats 2 to move closer to each other again, so that the two supporting components move to the predetermined position to support the roller body 5 of the lower brush roller, thereby preventing the roller shaft from deforming when the sliding seat 14 and the fixed seat 15 fall off the ends of the lower brush roller.

[0050] 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 block 22 can be supported on the roller. However, in order to avoid the support block 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 block 22 supports the roller body 5, which means that after the support block 22 moves into place with the roller seat 2, 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 block 22.

[0051] Furthermore, the structure of the roller seat 2 is as follows: The roller seat 2 includes a horizontal plate 25 for sliding connection to the frame 1. A support is connected to the lower end of the horizontal plate 25. The lower end of the support is recessed in the middle to form two opposing support parts 24 and a clearance groove 241 between the two support parts 24. A longitudinal plate 26 is provided between the horizontal plate 25 and each support part 24. The telescopic linkage is a linkage cylinder 21. 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. The longitudinal plate 26 is both the carrier for mounting the linkage cylinder 21 and also serves to reinforce the connection between the horizontal plate 25 and the support part 24. The telescopic linkage is connected between every two opposing longitudinal plates 26, allowing the front and rear ends of the roller seat 2 to 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 longitudinal plate 26. To ensure proper hinge, a fixing plate 261 is connected to the longitudinal plate 26, and hinge holes are machined on both the longitudinal plate 26 and the fixing plate 261. The fixing plate 261 can increase the thickness of the longitudinal plate 26 to compensate for the gap between the longitudinal plate 26 and the connecting ears, ensuring that the linkage cylinder 21 remains stable in the front-rear direction after it is hinged in place.

[0052] Furthermore, to ensure the structural strength of the roller seat 2, the roller seat 2 is a welded structural component. For efficient welding, a support is provided at the lower end of the horizontal plate 25. The middle part of the lower end of the support is recessed inward, thereby forming two support parts 24 and a clearance groove 241 between the two support parts 24. Compared with welding two support parts 24 at the lower end of the horizontal plate 25, this design can effectively reduce welding time. The support includes at least two vertical plates 243 spaced apart from left to right. The middle part of the lower end of the two vertical plates 243 is recessed inward, thereby forming two support parts 24 and a clearance groove 241 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 a hollow structure of the support. While ensuring the structural strength of the roller seat 2, the entire roller seat 2 is made lightweight.

[0053] Furthermore, such as Figure 13-14 As shown, to ensure the stability of the lower brush roller when it disengages from the sliding seat 14 and the fixed seat 15, the support block 22 is provided with an outwardly open support groove. The support groove includes a support surface 221 for supporting the roller body 5 of the lower brush roller and a limiting surface 222 perpendicular to the support surface 221. To further fit the outer periphery of the circular boss 51 of the roller body 5, when the two support components move to the predetermined position, the distance between the limiting surfaces 222 on the left and right sides is the same as the distance between the two ends of the roller body 5 of the corresponding lower brush roller; this restricts the two ends of the roller body 5 and prevents the lower brush roller from moving laterally in the left and right directions. Here, the end face of the roller body 5 refers to the outer end face 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 block 22 can effectively prevent the lower brush roller from moving laterally.

[0054] Furthermore, the limiting surface 222 on the support block 22 has a small area, and there are only two support blocks 22 on each roller seat 2. The two limiting surfaces 222 of the two support blocks 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 roller body 5 of the lower brush roller. The contact plate is provided with a contact surface 242, and the contact surface 242 and the limiting surface 222 are on the same vertical plane. The contact surface 242 can increase the contact area with the end face of the roller body 5, and together with the limiting surface 222, form four limiting points on the end of the roller body 5 to form a sufficient limiting force on the lower brush roller.

[0055] Furthermore, two linkage cylinders 21 are provided between the two roller seats 2. The piston rod and cylinder body of each linkage cylinder 21 are respectively hinged to each of the two left and right opposite longitudinal plates 26; the hinge design can prevent the piston rod from jamming when it extends or retracts.

[0056] Furthermore, when the support block 22 supports the roller body 5 of the lower brush roller and the sliding seat 14 slides and disengages from one end of the lower brush roller, in order to ensure that the other end of the lower brush roller quickly disengages from the fixed seat 15, the two roller seats 2 are connected by a telescopic linkage and can move synchronously in the left and right directions; one of the roller seats 2 is provided with a push cylinder 3 for acting with the fixed seat 15 and driving the two roller seats 2 to move away from the fixed seat 15 synchronously; when the push cylinder 3 is activated, it can provide the driving force for the two roller seats 2 and the lower brush roller to move away from the fixed seat 15 at the same time. When the push cylinder 3 is activated, it can act on the fixed seat 15, so that the two roller seats 2 slide in the direction away from the fixed seat 15, so that the roller shaft at the other end of the lower brush roller disengages from the fixed seat 15.

[0057] Furthermore, in order to place the frame 1 on the upper end of the support seat 1a, a hoisting method is adopted in this embodiment. The sling needs to be hoisted onto the hook of the crane first, and then the two ends of the sling are respectively hoisted onto the frame 1. In order to ensure that the hoisted frame 1 remains horizontal, the frame 1 is provided with a hoisting assembly. The hoisting 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. The second lifting lug 12 is provided with a leveling structure. The leveling structure includes multiple horizontally spaced second lifting holes 13a on the second lifting lug 12. One end of the hoisting device is hoisted into the first lifting hole 13, and the other end of the hoisting device is hoisted into one of the multiple second lifting holes 13a. That is to say, the operator can switch the hoisting end of the sling into 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 hoisted frame 1 remains horizontal.

[0058] Furthermore, the front and rear guide assembly includes two sets of front-to-back opposing swing seats, which can elastically swing in the front-to-back direction. Specifically, the swing seats are rotatably connected to a base, and an elastic element is provided between the base and the swing seats. The elastic element can be a torsion spring or a compression spring. The two sets of swing seats are located on the left and right sides of the frame 1, respectively. The swing seats are equipped with rotating guide wheels 17, and the front and rear sides of the bearing seat 1a are respectively equipped with guide plates for cooperating with the guide wheels 17. The guide wheels 17 cooperate with the guide plates to prevent the frame 1 from shaking in the front-to-back direction, so that the entire roller changing mechanism is in place with the bearing seat 1a in the front-to-back direction and maintained in a predetermined position.

[0059] Furthermore, when the hoisting roller changing mechanism is not in operation, it needs to be placed on the ground. To prevent the guide wheel 17 from contacting and wearing with the ground, the swing seat is equipped with a mounting plate located below the guide wheel 17. The mounting plate is equipped with a buffer pad 171 for contacting the ground. This allows the roller changing mechanism to be placed on the ground when it is not in operation, without worrying about the guide wheel 17 contacting and wearing with the ground.

[0060] Furthermore, the left and right guide components include two guide seats 16 facing each other on the left or right side of the lower end of the frame 1. The guide seats 16 are provided with inverted Y-shaped guide grooves, and the Y-shaped guide grooves have two guide slopes. The bearing seat 1a is provided with a rotating guide post at the corresponding position for cooperating with the guide slopes. After the guide seat 16 cooperates with the rotating guide post, the rotating guide post enters the Y-shaped guide groove after contacting the guide slope, which can prevent the frame 1 from shaking in the left and right direction and make the roller changing mechanism cooperate with the bearing seat 1a in the left and right direction.

[0061] Furthermore, to facilitate installation, each set of front and rear opposing swing seats is pre-connected to a support frame, and the guide seat 16 is also pre-installed on one of the support frames. The support frame is connected to the left or right side of the lower end of the frame 1, so that the front and rear guide components can be installed to the lower end of the frame 1 at one time, saving assembly time.

[0062] Furthermore, such as Figure 6-7 As shown, the linkage cylinder 21 and the push cylinder 3 require hydraulic oil to operate. 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 1 is a high-strength structure composed of multiple horizontal beams and longitudinal beams, which forms multiple windows around the frame 1 and at the top. One of the windows is equipped with a control panel. The empty windows are connected with sealing plates. The other windows on the upper surface and the surrounding side walls of the frame 1 are sealed by sealing plates to prevent debris from entering the frame 1. The hydraulic oil pipes can pass through the lower window near the linkage cylinder 21 and the push cylinder 3 and connect to the hydraulic station 18, ensuring that the linkage cylinder 21 and the push cylinder 3 can operate while optimizing the layout space.

[0063] 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 two roller seats 2 are connected by a telescopic linkage component 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 12As shown, a positioning assembly is provided between the frame 1 and the roller seat assembly. The positioning assembly includes an adjusting rack 231 and an adjusting gear 232 respectively mounted on the frame 1 and the roller seat assembly. A control rod is mounted on the adjusting gear 232, and a rotating shaft sleeve 252 is mounted on the corresponding roller seat 2. The control rod is located inside the rotating shaft sleeve 252, with both ends of the control rod extending out of the rotating shaft sleeve 252. One end of the control rod is connected to the adjusting gear 252, and a control handwheel 23 exposed on the frame 1 is mounted on the outer end of the control rod. Rotating the control handwheel 23 moves the two roller seats 2 synchronously in the left and right directions and stops at the corresponding positions, so that before changing the roller, the two roller seats 2 are symmetrical about the left and right with the lower brush roller as the reference. This avoids the phenomenon that one end of the lower brush roller body 5 is supported while the other end is not.

[0064] Furthermore, such as Figure 16 As shown, ideally, after the two opposing support blocks 22 move into position with the roller seat 2, the support blocks 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 blocks 22 is difficult to guarantee absolute accuracy. Therefore, to avoid interference between the support blocks 22 and the roller body 5 of the lower brush roller when they move, a preset gap s is formed between the support blocks 22 and the roller body 5 of the lower brush roller when the two roller seats 2 approach each other to the predetermined position. This preset gap s can prevent the support blocks 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 blocks 22 to contact the circular boss 51 on the roller body 5. Therefore, the frame 1 is also provided with a gap elimination mechanism 4. The gap elimination 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 compensation assembly and a transmission assembly. The transmission assembly includes a set of front and rear opposing support blocks 22 arranged on the frame 1. The corresponding transmission wheel 432, the lifting compensation assembly includes a lifting plate 434 and a set of connecting rods 433 disposed between the lifting plate 434 and two front-to-back opposing transmission wheels 432. The lower end of each connecting rod 433 is hinged to the lifting plate 434, and the upper end of the connecting rod 433 is eccentrically rotated with the corresponding transmission wheel 432. The drive assembly can drive the two sets of left-to-right opposing transmission wheels 432 to rotate synchronously by a predetermined angle, so that the two lifting plates 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 block 22 and the roller body 5. When the transmission wheel 432 rotates, the drive assembly can drive the lifting plate 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 size of the predetermined height is the size of the preset gap s. After eliminating the preset gap s, the support block 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 plate 434 more stable and smooth, a lifting guide assembly is provided between the frame 1 and the lifting plate 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 plate 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 movement of the lifting plate 434.

[0066] Furthermore, the drive assembly needs to simultaneously drive 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 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. Rotating the adjustment handwheel 411 causes the multiple transmission wheels 432 to rotate synchronously at a predetermined angle and stop at the corresponding position, thereby eliminating the preset gap s between the support block 22 and the roller body 5 and ensuring that the support block 22 supports 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 plate 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 contains a worm wheel and a worm connected in a transmission connection. Its specific structure is similar to... The structure of the worm gear reducer is similar and belongs to existing technology, so it will not be described in detail here. The worm gear transmission box 42 has an input end and an output end. The output end is equipped with an output shaft 438. 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. After the drive gear 431 rotates to its 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. This prevents the lifting plate 434 from retracting upwards due to the reverse rotation of the transmission wheels 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 provided with... An eccentric hole 4361, which is not concentric with the shaft hole, is used to drive the transmission shaft 432a. One end of the transmission shaft 432a is connected to the transmission wheel 432, and the other end of the transmission shaft 432a passes through the eccentric hole 4361 and is circumferentially fixed with the eccentric sleeve 436. The transmission wheel 432 rotates to drive the lifting plate 434 to move downward against 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 plate 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 supporting block 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 plate 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, and drives the two lifting plates 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 block 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. 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 block 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 its 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 the smooth circumferential rotation of the drive shaft 432a, 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 marker, allowing the spherical bearing 437 to be quickly installed in place.

[0076] 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 inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An adaptive hoist roll changing mechanism, characterized by, The utility model relates to a kind of self-adapting guiding device for lower brush roller, including: Frame (1) is used to be hoisted and placed on the upper end of bearing seat (1a) with lower brush roller; Roller seat assembly, including two left and right symmetrical roller seats (2) slidingly connected in the lower end of frame (1);Roller seat (2) includes two front and rear opposite and downwardly extending support parts (24), and the inner side of support part (24) is provided with supporting block (22) for supporting the roller body (5) of lower brush roller;Two supporting blocks (22) on each roller seat (2) opposite in front and back constitute roller assembly; Self-adapting guiding assembly is arranged on frame (1), including front and rear guiding assembly and left and right guiding assembly for cooperating with bearing seat (1a);Front and rear guiding assembly and left and right guiding assembly are all downward beyond the lower end of frame (1); When frame (1) is hoisted and placed on the upper end of bearing seat (1a), front and rear guiding assembly and left and right guiding assembly can be guided by cooperating with bearing seat (1a) and guiding the position of frame (1) and roller seat assembly, so that two roller assemblies are kept in place at both ends of lower brush roller respectively.

2. An adaptive hoist roll changing mechanism according to claim 1, wherein: Frame (1) is frame structure, and the upper end of frame (1) is connected with hoisting assembly, and hoisting assembly includes horizontally opposite first lifting lug (11) and second lifting lug (12) for cooperating with lifting appliance.

3. An adaptive hoist roll changing mechanism according to claim 2, wherein: Single first lifting hole (13) for cooperating with one end of lifting appliance is arranged on first lifting lug (11), and leveling structure is arranged on second lifting lug (12), and leveling structure includes multiple horizontally spaced second lifting holes (13a) for cooperating with the other end of lifting appliance.

4. An adaptive hoist roll changing mechanism according to claim 2, wherein: Frame structure of frame (1) is combined by multiple beams and longitudinal directions, so that multiple windows are formed around and at the top of frame (1), and the windows are connected with sealing plate.

5. An adaptive hoist roll changing mechanism according to claim 1, wherein: Front and rear guiding assembly includes two groups of front and rear opposite swing seats, and swing seat can be elastically swung in front and rear direction;Two groups of swing seats are respectively located at the left and right sides of frame (1), and swing seat is provided with rotating guide wheel (17), and the front and rear sides of bearing seat (1a) are provided with guide plate for cooperating with guide wheel (17) correspondingly.

6. An adaptive hoist roll changing mechanism according to claim 5, wherein: Swing seat is provided with mounting plate below guide wheel (17), and mounting plate is provided with buffer pad (171) for contacting ground.

7. An adaptive hoist roll changing mechanism as claimed in claim 1, wherein: Left and right guiding assembly includes two front and rear opposite guiding seats (16) arranged on the left side or right side of lower end of frame (1), guiding seat (16) is provided with inverted Y-shaped guide slot, Y-shaped guide slot has two guide inclined surfaces, and bearing seat (1a) is provided with rotating guide column for cooperating with guide inclined surface at corresponding position.

8. An adaptive hoist roll changing mechanism according to claim 5, wherein: Each group of front and rear opposite swing seats is connected on a support frame in advance, and support frame is connected on the left side or right side position of lower end of frame (1).

9. An adaptive hoist roll changing mechanism as claimed in claim 1, wherein: Two support parts (24) form open lower end avoiding groove (241);When two roller assemblies are kept in place at both ends of lower brush roller respectively, two avoiding grooves (241) correspond to the positions of roller shafts at both ends of lower brush roller respectively.

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