Eccentric adjusting mechanism

Abstract

The eccentric adjusting mechanism comprises a driving assembly and eccentric adjusting assemblies arranged in a bilateral symmetry mode, each eccentric adjusting assembly comprises a lifting assembly and a transmission assembly, each transmission assembly comprises a rotating wheel arranged on a rack, and each lifting assembly comprises a lifting part moving in the longitudinal direction and a connecting rod; the connecting rod is arranged between the rotating wheel and the lifting part, the lower end of the connecting rod is hinged to the lifting part, and the upper end of the connecting rod is in eccentric rotating connection with the rotating wheel. The driving assembly drives the rotating wheel in the transmission assembly to rotate, the lifting piece moves downwards to abut against the bearing base to lift the rack upwards, and therefore a preset gap is eliminated, the bearing block rigidly bears the roller body, deformation of the roller shaft is avoided, and the using quality and the roller replacing efficiency of the lower brush roller are guaranteed.

Description

Technical Field

[0001] The invention relates to the field of plate and strip grinding, and in particular to an eccentric adjustment mechanism. Background Art

[0002] Steel plates are also called strips. After production, the strips will be rolled up and stored, which is the common steel coil. The steel coil will enter the corresponding product manufacturing plant according to different usage requirements and be made into corresponding parts. During the period from when the strip enters the processing plant to when the strip is cut and processed, the surface material of the strip is prone to peeling or rusting. In order to remove the rust layer, the strip needs to be polished by the upper and lower brush rollers installed in the steel plate grinding equipment; the upper brush roller and the lower brush roller both include a roller body and roller shafts located at both ends of the roller body; after a long period of grinding, the grinding effect of the brush roller will also decrease, so the brush roller needs to be replaced.

[0003] When replacing the upper brush roller, the roller changing vehicle can be driven into the brush grinding equipment for receiving and replacing, but the lower brush roller can usually only be replaced manually. For example, in the oxide skin treatment device with announcement number CN216371592, two bearing seats are arranged on the bearing seat, one of which is slidable and the other is fixed, which can be respectively regarded as a sliding seat and a fixed seat; 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 bearing seat is moved out of the equipment, and then the sliding seat and the fixed seat are respectively disengaged from the roller shafts at both ends of the lower brush roller; due to the heavy weight of the lower brush roller, when replacing it, workers need to use slings to hang the roller body of the lower brush roller to avoid deformation of the roller shaft, but this replacement method is difficult to operate and is prone to safety hazards.

[0004] The applicant has designed a lower brush roller replacement mechanism, comprising a frame placed on the upper end of a bearing seat, wherein the lower end of the frame is provided with two roller seats slidably connected to the frame, the roller seat comprising two front and rear opposing support parts, a avoidance groove with an open lower end and avoiding the roller shaft between the two support parts, a supporting block is provided on the inner side of the support part, and the two front and rear opposing supporting blocks constitute a roller assembly, when the two roller seats approach each other and the two roller assemblies support the roller body of the lower brush roller, the lower brush roller remains stable, at which time the sliding seat and the fixed seat can respectively disengage the two ends of the lower brush roller and keep the roller shaft of the lower brush roller unchanged.

[0005] Ideally, each supporting block should be in close contact with the roller body of the lower brush roller. However, due to manufacturing and installation errors, there will always be a slight positional deviation in the actual installation position of the supporting block. Therefore, to avoid interference between the supporting block and the roller body when the supporting block approaches the roller body, the distance between two relatively front and rear supporting blocks is relatively wide, so that after the two roller seats are moved in place, a preset gap is formed between the supporting block and the roller body. However, after leaving the preset gap, the supporting block is in a separated state from the roller body and does not form a supporting force on the lower brush roller. When the sliding seat disengages from the roller shaft at one end of the lower brush roller, the roller shaft at the other end of the lower brush roller stuck in the fixed seat will still deform. Therefore, an adjustment mechanism that is easy to control and can eliminate the preset gap is needed to ensure that the supporting block can support the roller body, avoid roller shaft deformation, and ensure the use quality and roll changing efficiency of the lower brush roller. Summary of the Invention

[0006] The present invention provides an eccentric adjustment mechanism. By driving the driving component to drive the rotating wheel in the transmission component to rotate, the lifting member moves downward to press against the bearing seat and then lift the machine frame upward, thereby eliminating the preset gap, enabling the supporting block to form a rigid support for the roller body, avoiding roller shaft deformation, and ensuring the use quality and roll changing efficiency of the lower brush roller.

[0007] The technical solution of the present invention is realized as follows: An eccentric adjustment mechanism includes a driving component and eccentric adjustment components arranged symmetrically left and right. The eccentric adjustment components include a lifting component and a transmission component. The transmission component includes a rotating wheel for being arranged on the machine frame. The lifting component includes a lifting member moving longitudinally and a connecting rod. The connecting rod is arranged between the rotating wheel and the lifting member. The lower end of the connecting rod is hinged to the lifting member, and the upper end of the connecting rod forms an eccentric rotating connection with the rotating wheel; The driving component can drive all the rotating wheels in the two eccentric adjustment components to rotate synchronously by a predetermined angle, and drive the two lifting members to extend downward by a predetermined length, so that after the lifting members act on the bearing seat, the machine frame is lifted upward by a predetermined height.

[0008] Preferably, the transmission component includes two relatively front and rear rotating wheels, and the number of the connecting rods corresponds to the number of the rotating wheels; enabling the front and rear ends of the machine frame to be lifted upward simultaneously.

[0009] Preferably, the rotating wheel is a rotating gear. The driving component includes a driving shaft and two driving gears, and a linkage rod is connected between the two driving gears; the corresponding driving gear meshes with the left or right rotating gear; the driving shaft directly or indirectly acts on one of the driving gears, and an adjusting handwheel is connected to the outer end of the driving shaft. By rotating the adjusting handwheel, multiple rotating wheels rotate by a predetermined angle and stop at the corresponding positions.

[0010] Preferably, the transmission component includes two relatively front and rear rotating gears, the number of the connecting rods corresponds to the number of the rotating gears, and the corresponding driving gear meshes with the two relatively front and rear rotating gears on the left or right simultaneously.

[0011] Preferably, a self-locking transmission member is provided between the drive shaft and the corresponding drive gear. The self-locking transmission member is a worm and worm gear transmission box. The drive shaft is connected to the input end of the worm and worm gear transmission box, and the corresponding drive gear is connected to the output end of the worm and worm gear transmission box. After the drive gear rotates to the in-place position, the worm and worm gear transmission box restricts the reverse rotation of the drive gear, causing the two rotating wheels to stop at the predetermined positions, preventing the rotating wheels from reversing, and keeping the lifting member in the downward extended state.

[0012] Preferably, a central hole is provided in the middle of the rotating wheel, and a rotating shaft hole is provided at the upper end of the connecting rod. An eccentric component is installed in the rotating shaft hole. The eccentric component includes a transmission shaft and an eccentric sleeve. The eccentric sleeve is provided with an eccentric hole that is not concentric with the rotating shaft hole. The transmission shaft is inserted through the eccentric hole and the central hole, and is circumferentially fixed with the eccentric sleeve and the rotating wheel. The rotating wheel rotates to drive the two lifting members to extend downward. The eccentric sleeve can ensure uniform stress distribution of the rotating wheel while forming an eccentric drive for the connecting rod.

[0013] Preferably, an eccentricity is formed between the center of the eccentric hole and the center of the rotating shaft hole, and the size of the eccentricity is equal to half of the predetermined height. And the predetermined angle of synchronous rotation of multiple rotating wheels is 180 degrees. In the initial state, the center of the rotating shaft hole is directly above the center of the central hole. When multiple rotating wheels rotate synchronously by 180 degrees, the center of the rotating shaft hole moves to directly below the center of the central hole.

[0014] Preferably, when the synchronous rotation angle of multiple rotating wheels is greater than 180 degrees, the center of the rotating shaft hole rotates around the center of the central hole and approaches the initial position, driving the two lifting members that have already extended downward to reset upward, preventing excessive rotation from causing excessive lifting of the frame and avoiding deformation of the roller shaft due to upward force on the roller body.

[0015] Preferably, a central hole is provided in the middle of the rotating wheel, and a rotating shaft hole concentric with the central hole is provided at the upper end of the connecting rod. An eccentric hole spaced from the central hole is also provided on the rotating wheel, and a rotating shaft is inserted between the eccentric hole and the rotating shaft hole. The rotating wheel rotates to drive the two lifting members to extend downward.

[0016] Preferably, the drive assembly includes a drive motor and a connecting shaft disposed between two relatively left and right rotating wheels. A driven gear is sleeved on the connecting shaft, and the driven gear is circumferentially fixed with the connecting shaft. A driving gear is installed on the output end of the drive motor, and the driving gear meshes with the driven gear. The drive motor rotates to cause multiple rotating wheels to rotate a predetermined angle and stop at the corresponding positions.

[0017] The beneficial effects of the present invention adopting the above technical solutions are: In the eccentric adjustment mechanism of the present invention, the driving component can drive the rotating wheel to rotate, and form an eccentric driving effect on the connecting rod and the lifting member, so that the lifting member moves downward and acts on the bearing seat to lift the machine frame upward, thereby eliminating the preset gap between the supporting block and the roller body. During operation, the lifting height of the machine frame can be controlled by controlling the rotation angle of the rotating wheel to ensure that the supporting block forms just the right rigid support for the roller body; to avoid deformation of the roller shaft when the lower brush roller disengages from the sliding seat and the fixed seat, and to ensure the service quality and roll changing efficiency of the lower brush roller.

[0018] If the rotation angle of the rotating wheel exceeds the predetermined angle, an upward acting force will be formed on the roller body, resulting in deformation of the roller shaft stuck in the sliding seat and the fixed seat; to avoid this situation, the present invention sets the eccentricity between the eccentric hole and the rotating shaft hole to half of the predetermined height, and the predetermined angle of synchronous rotation of the rotating wheel is 180 degrees. This parameter limitation makes the lifting member reset upward when the rotation angle of the rotating wheel exceeds 180°, avoiding excessive acting force on the roller body by the supporting member, and ensuring the structural strength and service life of the lower brush roller. Description of the Drawings

[0019] Figure 1 It is a structural diagram of the roll changing assembly; Figure 2 It is a schematic structural diagram of the roll changing assembly from another angle; Figure 3 It is a cross-sectional view of the roller body of the lower brush roller supported by two front and rear opposite supporting members; Figure 4 It is a schematic diagram of the roll changing assembly placed on the upper end of the bearing seat; Figure 5 It is a schematic diagram of the sliding seat disengaging from one end of the roller shaft of the lower brush roller after the roller body of the lower brush roller is supported; Figure 6 It is a schematic diagram of the pushing cylinder acting and disengaging the roller shaft at the other end of the lower brush roller from the fixed seat; Figure 7 It is a structural diagram of the lifting adjustment mechanism after hiding the machine frame; Figure 8 It is a cross-sectional view of the lifting adjustment mechanism; Figure 9 It is an enlarged cross-sectional view of the mating position between the upper end of the connecting rod and the transmission shaft; Figure 10 It is an enlarged view of the pointer and the scale on the machine frame; Figure 11 It is a schematic structural diagram of the eccentric sleeve; Figure 12 It is a schematic structural diagram of the positioning adjustment assembly; Figure 13 It is a structural diagram of the lower brush roller supported by two roller seats; Figure 14It is a schematic structural diagram of a roll seat; Figure 15 It is a schematic principle diagram of changing the roll at the upper end of the bearing seat by the roll changing assembly; Figure 16 It is a comparison diagram when the preset gap exists and when the preset gap is eliminated; Figure 17 It is a schematic diagram of the eccentric rotational connection between the rotating wheel and the connecting rod in Embodiment 2; Figure 18 It is a schematic structural diagram of the driving assembly in Embodiment 3; Each reference numeral is: 1 - frame, 1a - bearing seat, 2 - roll seat, 3 - pushing oil cylinder, 4 - lifting adjustment mechanism, 5 - roll 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 - guiding seat, 17 - guiding wheel, 18 - hydraulic station, 21 - linkage oil cylinder, 22 - supporting member, 23 - control handwheel, 24 - supporting part, 25 - cross plate, 26 - mounting plate, 27 - reinforcing plate, 41 - driving shaft, 42 - worm and worm gear transmission box, 43 - eccentric adjustment assembly, 221 - supporting surface, 222 - limiting surface, 231 - adjusting rack, 232 - adjusting gear, 241 - avoiding groove, 242 - abutting surface, 251 - connecting seat, 252 - rotating shaft sleeve, 261 - fixing plate, 411 - adjusting handwheel, 412 - pointer, 413 - scale disk, 431 - driving gear, 432 - rotating wheel, 432a - transmission shaft, 432b - central hole, 433 - connecting rod, 434 - lifting member, 435 - guiding plate, 436 - eccentric sleeve, 4361 - eccentric hole, 4362 - snap ring groove, 4363 - annular groove, 437 - spherical plain bearing, 438 - output shaft, 439 - linkage rod, 44 - connecting shaft, 441 - driven gear, 442 - driving gear, 443 - driving motor, s - preset gap. Detailed implementation manners

[0020] In order to be able to more clearly understand the above - mentioned objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0021] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0022] The present invention has multiple implementation manners, and the specific implementation manners are as follows: Embodiment 1: As Figure 1-16As shown in the figure, this embodiment provides an eccentric adjustment mechanism, which is arranged on a roll changing mechanism. The roll changing mechanism includes: A bearing assembly, including a bearing seat 1a, a sliding seat 14 and a fixed seat 15 which are arranged on the bearing seat 1a and used for clamping 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 arranged in a box body with a single-sided opening on the bearing seat 1a; A roll changing assembly. The roll changing assembly includes a frame 1 placed on the upper end of the bearing seat 1a. In this embodiment, the frame 1 is placed on the upper end of the box body; two symmetrically arranged roller seats 2 are slidably connected to the lower end of the frame 1; a telescopic linkage member for driving the two roller seats 2 to approach each other is arranged between the two roller seats 2; a telescopic pushing member is arranged on the roller seat 2 facing the fixed seat 15; the roller seat 2 includes two support portions 24 which are opposite to each other front and back and extend downward. A supporting member 22 is connected to the inner side of the support portion 24; an avoidance area 241 with an open lower end is formed between the two support portions 24; the two avoidance areas 241 respectively correspond to the positions of the roller shafts at both ends of the lower brush roller; In the working state, the telescopic linkage member drives the two roller seats 2 to approach each other, and makes two groups of front and back opposite supporting members 22 move to a predetermined position to form a rigid support for the roller body 5 of the lower brush roller. When the sliding seat 14 disengages from the roller shaft at one end of the lower brush roller, the telescopic pushing member expands and contracts and acts on the fixed seat 15, so that the two roller seats 2 slide in a 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.

[0023] Furthermore, the roller body 5 of the lower brush roller includes a roller barrel for arranging brush strips. The outer diameter of the roller barrel is much larger than the outer diameter of the roller shaft. If the brush strips are not considered, the supporting member 22 can support on the roller barrel. However, to avoid the supporting member 22 contacting the brush strips on the roller barrel and causing the brush strips to deform, circular bosses 51 for arranging roller shafts are concentrically installed at both left and right ends of the roller barrel. The outer diameter of the circular boss 51 is smaller than the outer diameter of the roller barrel; after the two roller seats 2 approach each other to a predetermined position, in this embodiment, the supporting member 22 forming a support for the roller body 5 means that after the supporting member 22 moves into place along with the roller seat 2, it forms a support for the outer circumference of the circular boss 51, ensuring that the brush strips of the lower brush roller are not squeezed and deformed by the supporting member 22.

[0024] Furthermore, to place the roll-changing assembly on the upper end of the bearing seat 1a, in this embodiment, a hoisting method is adopted. The sling needs to be first hung on the hook of the overhead crane, and then the two ends of the sling are respectively hung on the frame 1. To ensure that the hoisted roll-changing assembly remains horizontal, a hoisting leveling assembly is provided on the frame 1. The hoisting leveling assembly includes a first lifting lug 11 and a second lifting lug 12 that are horizontally opposite. A single first lifting hole 13 is provided on the first lifting lug 11, and a plurality of horizontally spaced second lifting holes 13a are provided on the second lifting lug 12. One end of the flexible sling is hoisted in the first lifting hole 13, and the other end of the flexible sling is hoisted on one of the plurality of second lifting holes 13a. That is to say, the operator can switch the hoisting end of the sling among the plurality of 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 roll-changing assembly remains horizontal.

[0025] Furthermore, to ensure that when the roll-changing assembly is placed in place on the upper end of the bearing seat 1a, a front-back guiding mechanism and a left-right guiding mechanism are provided between the frame 1 and the bearing seat 1a. The front-back guiding mechanism includes an elastic guiding wheel 17 provided on the frame 1 and a guiding block provided on the bearing seat 1a. The left-right guiding mechanism includes a guiding seat 16 provided on the frame 1 and a guiding column provided on the bearing seat 1a. Through the cooperation of the elastic guiding wheel 17 and the guiding block, and the cooperation of the guiding seat 16 and the guiding column, the position of the roll-changing assembly in the hoisting state can be guided, so that it is stably placed at the corresponding position on the upper end of the bearing seat 1a. The specific structures of the front-back guiding mechanism and the left-right guiding mechanism can refer to the corresponding content in the idler device patent with the publication number CN221821042, which will not be elaborated here.

[0026] Furthermore, the structure of the roll seat 2 is as follows: The roll seat 2 includes a horizontal plate 25 for slidably connecting to the frame 1. A support is connected to the lower end of the horizontal plate 25. A concave portion is formed in the middle position at the lower end of the support to form two front-back opposite support portions 24 and an avoidance groove 241 between the two support portions 24. A longitudinal plate 26 is provided between the horizontal plate 25 and each support portion 24. The longitudinal plate 26 is both the carrier for installing the linkage oil cylinder 21 and plays a strengthening role between the horizontal plate 25 and the support portion 24. The above-mentioned telescopic linkage members are connected between every two left-right opposite longitudinal plates 26, so that the front and rear ends of the roll seat 2 can move synchronously. Two connecting ears are provided at the head end position of the piston rod and the tail end position of the cylinder body. The width between the two connecting ears is greater than the thickness of the longitudinal plate 26. To ensure the hinging in place, a fixing plate 261 is connected to the longitudinal plate 26, and hinge holes are simultaneously machined on the longitudinal plate 26 and the fixing plate 261. The fixing plate 261 can increase the thickness of the longitudinal plate 26 to make up for the gap between the longitudinal plate 26 and the connecting ear, so that after the linkage oil cylinder 21 is hinged in place, the linkage oil cylinder 21 remains stable in the front-back direction.

[0027] Furthermore, to ensure the structural strength of the roller seat 2, the roller seat 2 is a welded structural member. A support is provided at the lower end of the horizontal plate 25. The middle position of the lower end of the support is recessed inward, thereby forming two support portions 24 and a relief groove 241 located between the two support portions 24. To ensure the lightweight of the roller seat 2, the support is a hollow structure, including at least two vertical plates 243 spaced left and right and welded to the lower end of the horizontal plate 25. The middle parts of the lower ends of the two vertical plates 243 are recessed inward, thereby forming two support portions 24 and a relief groove 241 located between the two support portions 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 support described above.

[0028] Furthermore, as Figure 13-14 shown, to ensure the stability of the lower brush roller when it disengages from the sliding seat 14 and the fixed seat 15, the supporting member 22 is provided with an outwardly open supporting groove. The supporting groove includes a supporting surface 221 for supporting the lower brush roller and a vertical limiting surface 222 perpendicular to the supporting surface 221. To further fit the circular boss 51 of the roller body 5, the supporting surface 221 is an arc surface. When the two roller support assemblies support the lower brush roller, the vertical limiting surfaces 222 on the left and right sides respectively abut against the two end faces of the lower brush roller to prevent the lower brush roller from moving left and right when it disengages from the sliding seat 14 and the fixed seat 15. 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 respectively in contact with the outer end faces of the two circular bosses 51, the supporting member 22 can effectively prevent the lower brush roller from moving horizontally and vertically.

[0029] Furthermore, the area of the limiting surface 222 on the supporting member 22 is small, and there are only two supporting members 22 on each roller seat 2. The two limiting surfaces 222 of the two supporting members 22 can only form two limiting points on the outer end face of the roller body 5. Therefore, to increase the stability of the roller body 5, a fitting plate for contacting the end face of the roller body of the lower brush roller is provided on the inner side of the support portion 24. The fitting plate is provided with a fitting surface 242, and the fitting surface 242 and the limiting surface 222 are in the same vertical plane to increase the contact area between the roller seat 2 and the end of the roller body 5, form four limiting points on the end of the roller body 5, and keep the roller body 5 axially stable between the two roller seats 2.

[0030] Furthermore, to form sufficient linkage force for the two roller seats 2, the telescopic linkage member is a linkage oil cylinder 21. The linkage oil cylinder 21 includes a cylinder body respectively hinged on the two roller seats 2 and a telescopic rod moving in the cylinder body. The piston rod expands and contracts to make the two roller seats 2 approach each other to a predetermined position. The hinge design can prevent the linkage oil cylinder 21 from jamming when it acts.

[0031] Furthermore, as Figure 6-7As shown, the linkage cylinder 21 and the pushing cylinder 3 need to be driven by hydraulic oil during operation. Therefore, the frame 1 in this embodiment is of a frame structure, and a hydraulic station 18 connected to both the linkage cylinder 21 and the pushing cylinder 3 through hydraulic oil pipes is provided inside the frame structure. The hydraulic station 18 can output hydraulic oil to drive the linkage cylinder 21 and the pushing cylinder 3 to act. The hydraulic station 18 is an existing hydraulic component, and its specific principle will not be elaborated here. Among them, there are multiple connected windows on the four side walls and the upper and lower end faces of the frame structure. The windows on the upper end face and the four side walls are connected and sealed by cover plates. The hydraulic oil pipes can penetrate through the lower windows close to the linkage cylinder 21 and the pushing cylinder 3 and be connected to the hydraulic station 18, ensuring the operation of the linkage cylinder 21 and the pushing cylinder 3 while optimizing the layout space.

[0032] Furthermore, the linkage cylinder 21 is not only a linkage component for the two roller seats 2 to approach or move away from each other, 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 roller seat assembly that can move synchronously. Specifically, two guide rails are provided on the frame 1 at intervals in the front and rear directions. A corresponding connecting seat 251 is installed at the upper end of the cross plate 25 of the roller seat 2, and a sliding sleeve is installed on the connecting seat 251. The sliding sleeve is slidably connected to the corresponding guide rail. To adjust the positions of the two roller seats 2 at any time, make the two roller seats 2 symmetrical left and right with the lower brush roller as the reference during roll change, and ensure that the two idler roller assemblies can support the circular bosses 51 at both ends of the roller barrel at the same time. As Figure 12 shown, a positioning component is provided between the frame 1 and the roller seat assembly. The positioning component includes an adjusting rack 231 and an adjusting gear 232 respectively provided on the frame 1 and the roller seat assembly. A control rod is installed on the adjusting gear 232, and a rotating shaft sleeve 252 is installed on the corresponding roller seat 2. The control rod is installed on the adjusting gear 232, the control rod is located inside the rotating shaft sleeve 252, and both ends of the control rod penetrate outside the rotating shaft sleeve 252. The inner end of the control rod is connected to the adjusting gear 252, and a control handwheel 23 exposed on the frame 1 is installed at the outer end of the control rod. Rotate the control handwheel 23 and drive the two roller seats 2 to move synchronously in the left and right directions and stop at the corresponding positions, so that before roll change, the two roller seats 2 are symmetrical left and right with the lower brush roller as the reference. Avoid the phenomenon that one end of the roller body 5 of the lower brush roller is supported and the other end is not supported.

[0033] Furthermore, as Figure 16As shown, in an ideal state, after the two supporting members 22 facing each other front and back move into place along with the roller seat 2, the supporting members 22 should be aligned with the roller body 5 and closely adhere to the outer peripheral position of the circular boss 51. However, due to errors, it is difficult to ensure the absolute accuracy of the position of the supporting members 22. Therefore, to avoid interference between the supporting members 22 and the roller body 5 of the lower brush roller when the supporting members 22 move, when the two roller seats 2 approach each other to a predetermined position, a preset gap s is formed between the supporting members 22 and the roller body 5 of the lower brush roller; this preset gap s can prevent the supporting members 22 from colliding and interfering with the circular boss 51 after moving into place; but the reserved preset gap s makes it difficult for the supporting members 22 to contact the circular boss 51 on the roller body 5. Therefore, a gap compensation mechanism 4 is also provided on the frame 1. The gap compensation mechanism 4 is an eccentric adjustment mechanism, and the eccentric adjustment mechanism includes a driving component and eccentric adjustment components 43 arranged symmetrically left and right. The eccentric adjustment component 43 includes a lifting component and a transmission component. The transmission component includes a rotating wheel 432 for being arranged on the frame 1. The lifting component includes a lifting member 434 that moves longitudinally and a connecting rod 433. The connecting rod 433 is arranged between the rotating wheel 432 and the lifting member 434. The lower end of the connecting rod 433 is hinged to the lifting member 434, and the upper end of the connecting rod 433 is eccentrically rotatably connected to the rotating wheel 432; the driving component can drive all the rotating wheels 432 in the two eccentric adjustment components to synchronously rotate a predetermined angle and drive the two lifting members 434 to extend downward by a predetermined length, so that the lifting member 434 acts on the bearing seat and then lifts the frame 1 by a predetermined height; when the rotating wheel 432 rotates, the driving component can drive the lifting member 434 to act on the bearing seat 1a through the eccentric adjustment component, thereby forming an upward reaction force on the frame 1 and lifting the frame 1 by a predetermined height. The size of the predetermined height is the size of the preset gap s. After eliminating the preset gap s, the supporting members 22 can closely adhere to the outer periphery of the circular boss 51 and form a support for the roller body 5.

[0034] Furthermore, to make the downward movement of the lifting member 434 more stable and smooth, a lifting guiding component is provided between the frame 1 and the lifting member 434. The lifting guiding component includes two front and back facing guiding blocks arranged on the frame 1 and guiding plates 435 arranged at the front and rear ends of the lifting member 434. The guiding plates 435 are made of plastic; the two guiding blocks form a guiding groove, and the two guiding plates 435 contact the corresponding inner walls of the guiding groove and can move up and down to guide the movement of the lifting member 434.

[0035] Furthermore, to lift the front and rear ends of the frame 1 simultaneously, the transmission component includes two front and back facing rotating wheels 432, and the number of the connecting rods 433 corresponds to the number of the rotating wheels 432; to lift the front and rear ends of the frame 1 upward simultaneously.

[0036] Furthermore, the driving component needs to satisfy the requirement of simultaneously driving two sets of front and rear relative rotating wheels 432 in the two eccentric adjustment components to rotate simultaneously. To meet this requirement, the rotating wheel 432 is a rotating gear, and the driving component includes a driving shaft 41 and two driving gears 431. A linkage rod 439 is connected between the two driving gears 431; the corresponding driving gear 431 meshes with the rotating gear on the left or right side; the driving shaft 41 directly or indirectly acts on one of the driving gears 431. The outer end of the driving shaft 41 is connected with an adjusting handwheel 411. By rotating the adjusting handwheel 411, multiple rotating wheels 432 are rotated by a predetermined angle and stopped at corresponding positions; to ensure the lifting effect of the frame 1, the transmission component includes two front and rear relative rotating gears, and the number of connecting rods 433 corresponds to the number of rotating gears. The corresponding driving gear 431 meshes with two front and rear relative rotating gears on the left or right side simultaneously.

[0037] Furthermore, in an ideal state, the driving shaft 41 can be directly connected to one of the driving gears 431. However, to prevent the lifting member 434 from accidentally resetting upward and causing the preset gap s to appear again, in this embodiment, the driving shaft 41 indirectly acts on one of the driving gears 431. Specifically, a self-locking transmission member is provided between the driving shaft 41 and the corresponding driving gear 431. The self-locking transmission member is a worm and worm gear transmission box 42. Inside the worm and worm gear transmission box 42, there are a worm and a worm gear connected for transmission. Its specific structure is similar to that in a worm and worm gear reducer, which belongs to the prior art and will not be elaborated here; the worm and worm gear transmission box 42 has an input end and an output end. An output shaft 438 is provided at the output end position. The driving shaft 41 is connected to the input end of the worm and worm gear transmission box 42, and the corresponding driving gear 431 is connected to the output shaft 438 at the output end of the worm and worm gear transmission box 42; after the driving gear 431 rotates to the position, due to the self-locking characteristic of the worm and worm gear, the worm and worm gear transmission box 42 restricts the reverse rotation of the driving gear 431, so that the two rotating wheels 432 stop at the predetermined positions; to prevent the rotating wheels 432 from reversing, the lifting member 434 is kept in the state of extending downward and lifting the machine table 1.

[0038] Furthermore, the eccentric rotation connection structure between the rotating wheel 432 and the connecting rod 433 is as follows: A central hole 432b is provided in the middle of the rotating wheel 432. A rotating shaft hole is provided at the upper end of the connecting rod 433. An eccentric component is installed in the rotating shaft hole. The eccentric component includes a transmission shaft 432a and an eccentric sleeve 436. An eccentric hole 4361 that is not concentric with the rotating shaft hole is provided on the eccentric sleeve 436. The transmission shaft 432a is passed through the eccentric hole 4361 and the central hole 432b, and is circumferentially fixed with the eccentric sleeve 436 and the rotating wheel 432; when the rotating wheel 432 rotates, it drives the two lifting members 434 to extend downward; while the eccentric sleeve 436 can form an eccentric drive for the connecting rod 433, it can ensure the uniform stress distribution of the rotating wheel 432.

[0039] 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 the lower brush roller of different specifications, the range of the eccentricity in this embodiment is 3 mm - 12 mm. To facilitate determining whether the preset gap s is eliminated in place, the magnitude of the eccentricity in this embodiment is equal to half of the predetermined height. And the predetermined angle for the synchronous rotation of the plurality of rotating wheels 432 is 180 degrees. In the initial state, the center of the rotating shaft hole is directly above the center of the central hole 432b. When the plurality of rotating wheels 432 rotate synchronously by 180 degrees, the center of the rotating shaft hole moves to directly below the center of the central hole 432b, and the center of the rotating shaft hole moves a distance equal to twice the eccentricity in the vertical direction, which is the same as the magnitude of 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 10 mm and the magnitude of the eccentricity is 5 mm, in the initial state, the center of the rotating shaft hole of the connecting rod 433 is located at the uppermost end of the central hole. At this time, by controlling the rotating wheel 432 to rotate 180°, the preset gap s can be eliminated in place.

[0040] Furthermore, this design can also ensure that the roller shaft of the lower brush roller will not be deformed. Specifically, when the preset gap s is eliminated, the supporting surface 221 of the supporting 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, when the worker accidentally exceeds the predetermined angle when rotating the control handwheel 41, an upward acting force will be formed on the roller body 5, resulting in deformation of the roller shaft stuck in the sliding seat 14 and the fixed seat 15. For example, when the width of the preset gap s is 10 mm and the magnitude of the eccentricity is also 10 mm, only by rotating the entire rotating wheel 432 by 90° can the preset gap s be eliminated. When the operator accidentally exceeds the rotation angle of the rotating wheel 432 by more than 90°, the lifting member 434 will continue to move downward and press against the bearing 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 with the eccentricity in this embodiment. In this embodiment, when the preset gap s is eliminated in place, the center of the rotating shaft hole is already located at the lowermost end of the center of the central hole. When the synchronous rotation angle of the plurality of rotating wheels 432 is greater than 180 degrees, the center of the rotating shaft hole rotates around the center of the central hole 432b and approaches the initial position, and drives the two already downwardly extended lifting members 434 to reset upward. Even if the rotation angle of the rotating wheel 432 is accidentally exceeded by more than 180°, it will not cause the supporting member 22 to exert an excessive acting force on the roller body 5, ensuring the structural strength and service life of the lower brush roller.

[0041] Furthermore, to facilitate the operator to confirm whether the preset gap s is eliminated, such as Figure 10As shown, at the outer end of one of the transmission shafts 432a, a pointer 412 is connected and exposed on the frame 1. A scale plate 413 corresponding to the position of the pointer 412 is provided on the frame 1. A plurality of scale values are evenly distributed along the circumference on the scale plate 413: The scale values are usually angular values. For example, when the width of the preset gap s is 10 mm and the eccentricity is 5 mm, angular values from 0 to 180° can be set on the scale plate 413. After the transmission shaft 432a rotates by a corresponding angle and stops at the corresponding position, by visually observing the change range of the scale value of the pointer 412 on the scale plate 413, that is, visually observing whether the pointer 412 has rotated by 180°, it is confirmed that the preset gap s between the supporting member 22 and the roller body 5 is eliminated in place.

[0042] Furthermore, between the eccentric hole 4361 and the transmission shaft 432a, and between the central hole and the transmission shaft 432a, key connections are used to keep the rotating wheel 432 and the eccentric sleeve circumferentially fixed to the transmission shaft 432a; the key connection can be a flat key connection or a spline connection.

[0043] Furthermore, as Figure 9 shown, in the ideal state, the transmission shaft 432a always remains concentric with the eccentric hole 4361 during rotation. However, due to manufacturing and installation errors, when the transmission shaft 432a rotates, there will be a small relative displacement in the transverse direction with the eccentric hole 4361, that is, the so-called misalignment phenomenon. To avoid the misalignment phenomenon from generating a transverse force on the connecting rod 433 and affecting the smooth movement of the connecting rod 433, a spherical plain bearing 437 is installed in the rotating shaft hole of the rotating shaft. The spherical plain bearing 437 is sleeved on the outer wall of the eccentric sleeve 436; the contact surface between the inner ring and the outer ring of the spherical plain bearing 437 is spherical. Its inner ring is sleeved on the outer wall of the eccentric sleeve 436. While ensuring the smooth circumferential rotation of the transmission shaft 432a, it allows the connecting rod 433 to swing relative to the transmission shaft 432a in the transverse direction, avoiding excessive transverse force on the connecting rod 433.

[0044] Furthermore, end caps for sealing the rotating shaft hole are provided at both ends of the rotating shaft hole of the connecting rod 433; to ensure that the components inside the rotating shaft hole are separated from the outside; at the same time, the end caps can also limit the axial movement of the spherical plain bearing 437. Specifically, two retaining ring grooves 4362 corresponding to the two ends of the spherical plain bearing 437 are provided on the outer wall of the eccentric sleeve 436. Retaining rings are provided in the retaining ring grooves 4362, and the two retaining rings are respectively abutted by the two end caps to limit the axial movement of the spherical plain bearing 437.

[0045] Furthermore, at the position where the eccentric sleeve 436 is provided with the spherical plain bearing 437, there is also an annular groove 4363. The annular groove 4363 can accommodate lubricant to make the rotation of the transmission shaft 432a smoother, and can also be used as an installation mark to enable the spherical plain bearing 437 to be quickly installed in place.

[0046] Embodiment 2: As Figure 17As shown in the figure, the difference between this embodiment and the above-mentioned embodiment lies in that the eccentric rotation connection structure between the rotating wheel 432 and the connecting rod 433 is different. In this embodiment, a central hole 432b is provided in the middle of the rotating wheel 432, and a rotating shaft hole concentric with the central hole 432b is provided at the upper end of the connecting rod 433. An eccentric hole 4361 spaced from the central hole 432 is also provided on the rotating wheel 432, and a rotating shaft is passed through between the eccentric hole 4361 and the rotating shaft hole. When the rotating wheel 432 rotates, a transmission structure similar to a crank-slider is formed for the connecting rod 433 to drive the two lifting members 434 to extend downward, achieving the same eccentric transmission effect as in the above-mentioned embodiment.

[0047] Embodiment 3: As Figure 18 shown in the figure, the difference between this embodiment and the above-mentioned embodiment lies in that the structure of the drive assembly is different. In this embodiment, the drive assembly includes a drive motor 443 and a connecting shaft 44 disposed between two relatively left and right rotating wheels 432. A driven gear 441 is sleeved on the connecting shaft 44, and the driven gear 441 is fixed to the connecting shaft 44 along the circumferential direction. A driving gear 442 is installed on the output end of the drive motor 443, and the driving gear 442 and the drive motor 43 are disposed on the frame 1. The driving gear 442 meshes with the driven gear 441. When the drive motor 443 rotates, the connecting shaft 44 is driven to rotate through gear transmission, so that the plurality of rotating wheels 432 rotate a predetermined angle and stop at corresponding positions, achieving the same driving effect as in the above-mentioned embodiment.

[0048] The above schematically describes the present invention and its embodiments. The description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design a structural manner and an embodiment similar to the technical solution without creative efforts without departing from the spirit of the present invention, they shall fall within the protection scope of the present invention.

Claims

1. An eccentric adjustment mechanism, characterized in that: The eccentric adjustment assembly (43) comprises a driving assembly and an eccentric adjustment assembly (43) arranged symmetrically on both sides. The eccentric adjustment assembly (43) comprises a lifting assembly and a transmission assembly. The transmission assembly comprises a rotating wheel (432) for being arranged on a frame (1). The lifting assembly comprises a lifting member (434) and a connecting rod (433) movable in the longitudinal direction. The connecting rod (433) is arranged between the rotating wheel (432) and the lifting member (434). The lower end of the connecting rod (433) is hinged on the lifting member (434). The upper end of the connecting rod (433) forms an eccentric rotation connection with the rotating wheel (432). The driving assembly can drive all the rotating wheels (432) in the two eccentric adjustment assemblies to rotate synchronously to a predetermined angle, and drive the two lifting members (434) to extend downward to a predetermined length, so that the lifting members (434) can lift the frame (1) upward to a predetermined height after acting on the bearing seat.

2. An eccentric adjustment mechanism according to claim 1, characterized in that: The transmission assembly comprises two rotating wheels (432) which are opposite to each other in front and rear directions, and the number of the connecting rods (433) corresponds to the number of the rotating wheels (432).

3. The eccentric adjustment mechanism according to claim 1, characterized in that: The rotating wheel (432) is a rotating gear. The driving assembly comprises a driving shaft (41) and two driving gears (431). A linkage rod (439) is connected between the two driving gears (431). The corresponding driving gear (431) meshes with the rotating gear on the left or right. The driving shaft (41) directly or indirectly acts on one of the driving gears (431). An adjusting hand wheel (411) is connected to the outer end of the driving shaft (41). By rotating the adjusting hand wheel (411), the plurality of rotating wheels (432) are rotated to a predetermined angle and stopped at a corresponding position.

4. An eccentric adjustment mechanism according to claim 3, characterized in that: The transmission assembly comprises two rotating gears which are opposite to each other in front and back, the number of connecting rods (433) corresponds to the number of rotating gears, and the corresponding driving gear (431) is simultaneously meshed with the two rotating gears which are opposite to each other in front and back on the left or right side.

5. The eccentric adjustment mechanism according to claim 3, characterized in that: A self-locking transmission member is provided between the drive shaft (41) and the corresponding drive gear (431), and the self-locking transmission member is a worm gear transmission box (42). The drive shaft (41) is connected to an input end of the worm gear transmission box (42), and the corresponding drive gear (431) is connected to an output end of the worm gear transmission box (42). After the drive gear (431) rotates to a certain position, the worm gear transmission box (42) restricts the drive gear (431) from rotating in the opposite direction, so that the two rotating wheels (432) stop at a predetermined position.

6. The eccentric adjustment mechanism according to claim 1, characterized in that: A central hole (432b) is provided in the middle of the rotating wheel (432), a rotating shaft hole is provided at the upper end of the connecting rod (433), an eccentric assembly is installed in the rotating shaft hole, and the eccentric assembly comprises a transmission shaft (432a) and an eccentric sleeve (436), an eccentric hole (4361) which is not concentric with the rotating shaft hole is provided on the eccentric sleeve (436), the transmission shaft (432a) is passed through the eccentric hole (4361) and the central hole (432b), and is circumferentially fixed to the eccentric sleeve (436) and the rotating wheel (432); the rotating wheel (432) rotates to drive the two lifting members (434) to extend downward.

7. An eccentric adjustment mechanism according to claim 6, characterized in that: An eccentric distance is formed between the center of the eccentric hole (4361) and the center of the rotating shaft hole, and the size of the eccentric distance is equal to one half of the predetermined height; and the predetermined angle size of the synchronous rotation of the multiple rotating wheels (432) is 180 degrees; in the initial state, the center of the rotating shaft hole is located directly above the center of the center hole (432b); when the multiple rotating wheels (432) rotate synchronously by 180 degrees, the center of the rotating shaft hole moves to directly below the center of the center hole (432b).

8. An eccentric adjustment mechanism according to claim 7, characterized in that: When the angle of synchronous rotation of the multiple rotating wheels (432) is greater than 180 degrees, the center of the rotating shaft hole rotates around the center of the central hole (432b) and approaches the initial position, and drives the two lifting members (434) that have extended downward to reset upward.

9. The eccentric adjustment mechanism according to claim 1, characterized in that: A central hole (432b) is provided in the middle of the rotating wheel (432), a rotating shaft hole concentric with the central hole (432b) is provided at the upper end of the connecting rod (433), an eccentric hole (4361) spaced from the central hole (432) is further provided on the rotating wheel (432), and a rotating shaft is passed through the eccentric hole (4361) and the rotating shaft hole; the rotating wheel (432) rotates to drive the two lifting members (434) to extend downward.

10. The eccentric adjustment mechanism according to claim 1, characterized in that: The driving assembly comprises a driving motor (443) and a connecting shaft (44) arranged between two rotating wheels (432) opposite to each other on the left and right. A driven gear (441) is sleeved on the connecting shaft (44), and the driven gear (441) is fixed to the connecting shaft along the circumferential direction. A driving gear (442) is installed on the output end of the driving motor (443), and the driving gear (442) is meshed with the driven gear (441). The driving motor (443) rotates, so that the plurality of rotating wheels (432) rotate to a predetermined angle and stop at corresponding positions.

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