Eccentric lifting adjusting device

Abstract

The utility model discloses an eccentric lifting adjusting device which 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 machine frame, and each lifting assembly comprises a lifting piece 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 utility model relates to the field of plate strip polishing, in particular to an eccentric lifting adjusting device. BACKGROUND

[0002] Steel plate is also called plate strip, plate strip is rolled up after being made and is stored, that is, common steel coil, steel coil will enter corresponding product manufacturing processing factory according to different use demand and is made into corresponding spare parts, and the surface material of plate strip is easy to peel off or rust in the time when plate strip enters processing factory to plate strip is cut and processed, in order to remove the rust layer, plate strip needs to be polished through the upper brush roller and lower brush roller opposite to each other installed in steel plate grinding brush equipment;The upper brush roller and the lower brush roller all include a roller body and a roller shaft located at both ends of the roller body;After long-time polishing, the polishing effect of the brush roller will also decrease, so the brush roller needs to be replaced.

[0003] When the upper brush roller is replaced, the roller changing trolley can be opened into the grinding brush equipment for receiving and replacing, but the lower brush roller can usually only be replaced manually, for example, in the scale treatment device with the announcement number CN216371592, two bearing seats are arranged on the bearing seat, one of the two bearing seats is slidable, and the other is fixedly arranged, 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 clamped 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 separated from the roller shafts at both ends of the lower brush roller;Due to the large weight of the lower brush roller, when replacing, the worker needs to use a sling to hoist the roller body of the lower brush roller to avoid deformation of the roller shaft, but this replacement method has high operation difficulty and is easy to cause safety hazards.

[0004] The applicant designs a lower brush roller replacement mechanism, which includes a rack for being placed on the upper end of the bearing seat, two roller seats slidingly connected to the rack are arranged at the lower end of the rack, the roller seat includes two front and rear supporting parts, the two supporting parts have an avoidance groove with an open lower end and avoiding the roller shaft therebetween, the inner side of the supporting part has a supporting block, and the two front and rear supporting blocks form a roller supporting assembly;When the two roller seats are close to each other and the two roller supporting assemblies support the roller body of the lower brush roller, the lower brush roller remains stable, at this time, the sliding seat and the fixed seat can be separated from the two ends of the lower brush roller, and the roller shaft of the lower brush roller remains unchanged.

[0005] Ideally, each support block should be tightly attached to 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 support blocks. Therefore, to avoid interference between the support blocks and the roller when they are close to the roller, the distance between the two opposing support blocks is relatively wide, so that after the two roller seats are moved into place, a preset gap is formed between the support blocks and the roller. However, after leaving the preset gap, the support blocks are separated from the roller and do not provide support for 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, which is 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 support blocks can support the roller and prevent the roller shaft from deforming, thus ensuring the quality of the lower brush roller and the efficiency of roller replacement. Summary of the Invention

[0006] This utility model provides an eccentric lifting adjustment device. By driving the rotating wheel in the transmission component through the drive component, the lifting component moves downward to press against the bearing seat and then lifts the frame upward, thereby eliminating the preset gap and making the support block form a rigid support for the roller body, avoiding roller shaft deformation, and ensuring the quality of use of the lower brush roller and roller replacement efficiency.

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

[0008] An eccentric lifting adjustment device includes a drive assembly and an eccentric adjustment assembly arranged symmetrically on the left and right sides. The eccentric adjustment assembly includes a lifting assembly and a transmission assembly. The transmission assembly includes a rotating wheel for mounting on a frame. The lifting assembly includes a lifting member that moves longitudinally and a connecting rod. The connecting rod is located 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 rotational connection with the rotating wheel.

[0009] The drive assembly can drive all the rotating wheels in the two eccentric adjustment assemblies to rotate synchronously by a predetermined angle, and drive the two lifting components to extend downward by a predetermined length, so that the lifting components, after acting on the bearing seat, will raise the frame upward by a predetermined height.

[0010] Preferably, the transmission assembly includes two front-to-back rotating wheels, and the number of connecting rods corresponds to the number of rotating wheels, so that the front and rear ends of the frame are raised simultaneously.

[0011] Preferably, the rotating wheel is a rotating gear, and the drive assembly includes a drive shaft and two drive gears, with a linkage rod connecting the two drive gears; the corresponding drive gear meshes with the rotating gear on the left or right; the drive shaft acts directly or indirectly on one of the drive gears, and an adjusting handwheel is connected to the outer end of the drive shaft. Rotating the adjusting handwheel causes the multiple rotating wheels to rotate at a predetermined angle and stop at the corresponding position.

[0012] Preferably, the transmission assembly includes two front-to-back rotating gears, the number of connecting rods corresponds to the number of rotating gears, and the corresponding drive gear meshes simultaneously with the two front-to-back rotating gears on the left or right side.

[0013] Preferably, a self-locking transmission component is provided between the drive shaft and the corresponding drive gear. The self-locking transmission component is a worm gear transmission box. The drive shaft is connected to the input end of the worm gear transmission box, and the corresponding drive gear is connected to the output end of the worm gear transmission box. After the drive gear rotates to the correct position, the worm gear transmission box restricts the drive gear from rotating in the opposite direction, so that the two rotating wheels stop at the predetermined position. This prevents the rotating wheels from reversing and keeps the lifting component in the downward extended state.

[0014] Preferably, the rotating wheel has a central hole in the middle, and the connecting rod has a shaft hole at the upper end. An eccentric assembly is installed in the shaft hole. The eccentric assembly includes a drive shaft and an eccentric sleeve. The eccentric sleeve has an eccentric hole that is not concentric with the shaft hole. The drive shaft passes 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 parts to extend downward. The eccentric sleeve can ensure uniform stress distribution on the rotating wheel while forming an eccentric transmission to the connecting rod.

[0015] Preferably, there is an eccentricity 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 the multiple rotating wheels is 180 degrees; in the initial state, the center of the rotating shaft hole is located directly above the center of the central hole; when the 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.

[0016] Preferably, when the angle of synchronous rotation 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 moves closer to the initial position, driving the two lifting parts that have already extended downwards to return to their original positions; this prevents excessive rotation from causing the frame to be raised excessively and avoids the roller body from being subjected to upward force, which could lead to roller shaft deformation.

[0017] Preferably, the rotating wheel has a central hole in the middle, the upper end of the connecting rod has a pivot hole concentric with the central hole, and the rotating wheel also has an eccentric hole spaced apart from the central hole. A pivot is inserted between the eccentric hole and the pivot hole. The rotating wheel rotates to drive the two lifting components to extend downward.

[0018] Preferably, the drive assembly includes a drive motor and a connecting shaft disposed between two left and right opposite rotating wheels. A driven gear is sleeved on the connecting shaft and is fixed to the connecting shaft circumferentially. A driving gear is installed on the output end of the drive motor and meshes with the driven gear. The drive motor rotates, causing the multiple rotating wheels to rotate by a predetermined angle and stop at the corresponding positions.

[0019] The beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0020] The eccentric adjustment mechanism in this invention can drive the rotating wheel to rotate through the drive assembly, and create an eccentric transmission effect on the connecting rod and lifting component. This causes the lifting component to move downward and act on the support seat, lifting the frame upward, thereby eliminating the pre-set gap between the support block and the roller body. During operation, the upward lifting height of the frame can be controlled by controlling the rotation angle of the rotating wheel, ensuring that the support block provides just the right rigid support for the roller body. This prevents the roller shaft from deforming when the lower brush roller disengages from the sliding seat and the fixed seat, ensuring the quality of the lower brush roller and the efficiency of roller replacement.

[0021] If the rotation angle of the rotating wheel exceeds a predetermined angle, it will exert an upward force on the roller body, causing the roller shaft stuck in the sliding seat and fixed seat to deform. To avoid this situation, this utility model sets the eccentricity between the eccentric hole and the rotating shaft hole to half of the predetermined height, and makes the predetermined angle of synchronous rotation of the rotating wheel 180 degrees. This parameter limits that when the rotation angle of the rotating wheel exceeds 180 degrees, the lifting component will reset upward, avoiding the supporting component from exerting excessive force on the roller body, and ensuring the structural strength and service life of the lower brush roller. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the roller changing assembly;

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

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

[0025] Figure 4 This is a schematic diagram showing the roller changing assembly 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 lifting and adjusting mechanism is shown below, with the frame removed.

[0029] Figure 8 This is a sectional view of the lifting and adjusting 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 roller changing assembly 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 schematic diagram of the eccentric rotational connection between the rotating wheel and the connecting rod in Example 2;

[0039] Figure 18 This is a schematic diagram of the drive component in Example 3;

[0040] The attached figures are labeled as follows: 1-Frame, 1a-Bearing seat, 2-Roller seat, 3-Pushing cylinder, 4-Lifting adjustment mechanism, 5-Roller body, 51-Circular boss, 11-First lifting lug, 12-Second lifting lug, 13-First lifting hole, 13a-Second lifting hole, 14-Sliding seat, 15-Fixed seat, 16-Guide seat, 17-Guide wheel, 18-Hydraulic station, 21-Linkage cylinder, 22-Support component, 23-Control handwheel, 24-Support part, 25-Horizontal plate, 26-Mounting plate, 27-Reinforcing plate, 41-Drive shaft, 42-Worm gear transmission box, 43-Eccentric adjustment assembly, 221-Supporting surface, 222-Limiting surface, 231-Adjusting rack, 232- Adjusting gear, 241- clearance groove, 242- contact surface, 251- connecting seat, 252- rotating shaft sleeve, 261- fixing plate, 411- adjusting handwheel, 412- pointer, 413- dial, 431- drive gear, 432- rotating wheel, 432a- transmission shaft, 432b- center hole, 433- connecting rod, 434- lifting component, 435- guide plate, 436- eccentric sleeve, 4361- eccentric hole, 4362- retaining ring groove, 4363- annular groove, 437- spherical bearing, 438- output shaft, 439- linkage rod, 44- connecting shaft, 441- driven gear, 442- driving gear, 443- drive motor, s- preset clearance. Detailed Implementation

[0041] 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.

[0042] 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.

[0043] This utility model has multiple embodiments, the specific embodiments of which are as follows:

[0044] Example 1: As Figures 1-16 As shown, this embodiment provides an eccentric lifting adjustment device. The eccentric adjustment mechanism is mounted on a roller changing mechanism, which includes:

[0045] The support assembly includes a support base 1a and a sliding seat 14 and a fixed seat 15 disposed on the support base 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 on the support base 1a.

[0046] The roller changing assembly includes a frame 1 placed on the upper end of the support seat 1a. In this embodiment, the frame 1 is placed on the upper end of the housing. Two symmetrical roller seats 2 are slidably connected to the lower end of the frame 1. A telescopic linkage is provided between the two roller seats 2 to drive the two roller seats 2 to move closer to each other. A telescopic pushing member is provided on the roller seat 2 facing the fixed seat 15. The roller seat 2 includes two support parts 24 that are opposite to each other and extend downward. A support member 22 is connected to the inner side of the support part 24. A clearance area 241 with an open lower end is formed between the two support parts 24. The two clearance areas 241 correspond to the roller shaft positions at both ends of the lower brush roller.

[0047] In operation, the telescopic linkage drives the two roller seats 2 to move closer to each other and moves the two sets of front and rear opposing support members 22 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 pusher extends and extends and acts on the fixed seat 15, causing the two roller seats 2 to slide 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.

[0048] Furthermore, the roller body 5 of the lower brush roller includes a roller for laying brush strips. The outer diameter of the roller is much larger than the outer diameter of the roller shaft. If the brush strips are not considered, the support member 22 can be supported on the roller. However, in order to avoid the support member 22 contacting the brush strips on the roller and causing the brush strips to deform, circular bosses 51 for setting the roller shaft are concentrically installed at both ends of the roller. The outer diameter of the circular bosses 51 is smaller than the outer diameter of the roller. After the two roller seats 2 approach each other to a predetermined position, in this embodiment, the support member 22 supports the roller body 5, which means that after the support member 22 moves into place, it supports the outer periphery of the circular bosses 51, ensuring that the brush strips of the lower brush roller are not deformed by the pressure of the support member 22.

[0049] Furthermore, in order to place the roller changing assembly 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 roller changing assembly is kept horizontal, the frame 1 is provided with a hoisting leveling assembly. The hoisting leveling assembly includes a first lifting lug 11 and a second lifting lug 12 that are horizontally opposite each other. The first lifting lug 11 has a single first lifting hole 13, and the second lifting lug 12 has multiple horizontally spaced second lifting holes 13a. One end of the flexible sling is hoisted into the first lifting hole 13, and the other end of the flexible sling 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 within 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 roller changing assembly is kept horizontal.

[0050] Furthermore, to ensure that the roller changing assembly is placed in place on the upper end of the support seat 1a, a front-rear guide mechanism and a left-right guide mechanism are provided between the frame 1 and the support seat 1a. The front-rear guide mechanism includes an elastic guide wheel 17 set on the frame 1 and a guide block set on the support seat 1a. The left-right guide mechanism includes a guide seat 16 set on the frame 1 and a guide column set on the support seat 1a. Through the cooperation of the elastic guide wheel 17 and the guide block, and the cooperation of the guide seat 16 and the guide column, the position of the roller changing assembly in the hoisting state can be guided so that it is stably placed in the corresponding position on the upper end of the support seat 1a. The specific structure of the front-rear guide mechanism and the left-right guide mechanism can be referred to the corresponding content in the roller device patent with announcement number CN221821042, and will not be repeated here.

[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 middle part of the support is recessed to form two front-to-back 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 longitudinal plate 26 is the carrier for mounting the linkage cylinder 21 and also strengthens the connection between the horizontal plate 25 and the support part 24. The aforementioned telescopic mechanism is connected between every two left-to-right opposing longitudinal plates 26. The linkage component allows 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 that the hinge is in place, a fixed plate 261 is connected to the longitudinal plate 26. Hinges are machined on both the longitudinal plate 26 and the fixed plate 261. The fixed 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 ears, so that after the linkage cylinder 21 is hinged in place, the linkage cylinder 21 remains stable in the front and rear directions.

[0052] Furthermore, to ensure the structural strength of the roller seat 2, the roller seat 2 is a welded structural component, wherein the lower end of the horizontal plate 25 is provided with a support, and the middle position of the lower end of the support is recessed inward, thereby forming two support parts 24 and a clearance groove 241 located between the two support parts 24; to ensure the lightweight of the roller seat 2, the support is a hollow structure, including at least two vertical plates 243 spaced apart from each other and welded to the lower end of the horizontal plate 25, the middle position of the lower end of the two vertical plates 243 is recessed inward, thereby forming two support parts 24 and a clearance groove 241 located between the two support parts 24; a connecting plate 244 is fixedly installed between every two adjacent vertical plates 243, and the connecting plate 244 and the two vertical plates 243 form the hollow structure of the support.

[0053] Furthermore, such as Figures 13-14 As shown, to ensure the lower brush roller remains stable when it disengages from the sliding seat 14 and the fixed seat 15, the support member 22 is provided with an outwardly open support groove. The support groove includes a support surface 221 for supporting the lower brush roller and a vertical limiting surface 222 perpendicular to the support surface 221. To further fit the circular boss 51 of the roller body 5, the support surface 221 is an arc-shaped surface. When the two roller 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 in contact with the outer end faces of the two circular bosses 51 respectively, the support member 22 can effectively prevent the lower brush roller from moving laterally.

[0054] Furthermore, the limiting surface 222 on the support member 22 has a small area, and there are only two support members 22 on each roller seat 2. The two limiting surfaces 222 of the two support members 22 can only form two limiting points on the outer end face of the roller body 5. Therefore, in order to increase the stability of the roller body 5, the inner side of the support part 24 is provided with a contact plate for contacting the end face of the lower brush roller. The contact plate is provided with a contact surface 242. The contact surface 242 and the limiting surface 222 are on the same vertical plane to increase the contact area of ​​the roller seat 2 on the end of the roller body 5 and form four limiting points on the end of the roller body 5, so that the roller body 5 remains axially stable between the two roller seats 2.

[0055] Furthermore, in order to generate sufficient linkage force for the two roller seats 2, the telescopic linkage component is a linkage cylinder 21. The linkage cylinder 21 includes a cylinder body that is respectively hinged to the two roller seats 2 and a telescopic rod that moves within the cylinder body. The piston rod extends and retracts, bringing the two roller seats 2 closer to each other to a predetermined position. The hinged design can prevent the linkage cylinder 21 from jamming when it operates.

[0056] Furthermore, such as Figures 6-7 As shown, the linkage cylinder 21 and the push cylinder 3 require hydraulic oil to drive them during operation. Therefore, the frame 1 in this embodiment is a frame structure. The frame structure is equipped with a hydraulic station 18 that is connected to both the linkage cylinder 21 and the push cylinder 3 via hydraulic oil pipes. The hydraulic station 18 can output hydraulic oil to drive the linkage cylinder 21 and the push cylinder 3. The hydraulic station 18 is an existing hydraulic component, and its specific principle will not be described in detail. The frame structure has multiple connected windows on its four side walls and upper and lower end faces. The windows on the upper end face and four side walls are sealed by cover plates. The hydraulic oil pipes can pass through the lower end windows near the linkage cylinder 21 and the push cylinder 3 and connect to the hydraulic station 18, ensuring that the linkage cylinder 21 and the push cylinder 3 can move while optimizing the layout space.

[0057] 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.

[0058] Furthermore, such as Figure 16 As shown, ideally, after the two opposing support members 22 move into position with the roller seat 2, the support members 22 should be aligned with the roller body 5 and closely abut the outer periphery of the circular boss 51. However, due to error, the position of the support members 22 is difficult to guarantee absolute accuracy. Therefore, to avoid interference between the support members 22 and the roller body 5 of the lower brush roller when they move, a preset gap s is formed between the support members 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 members 22 from colliding and interfering with the circular boss 51 after they move into position. However, the preset gap s makes it difficult for the support members 22 to contact the circular boss 51 on the roller body 5. Therefore, the frame 1 is also provided with a gap compensation mechanism 4. The gap compensation mechanism 4 is an eccentric adjustment mechanism. The eccentric adjustment mechanism includes a drive assembly and eccentric adjustment components 43 arranged symmetrically on the left and right. The eccentric adjustment components 43 include a lifting assembly and a transmission assembly. The transmission assembly includes components for setting... The rotating wheel 432 on the frame 1, the lifting assembly includes a lifting member 434 and a connecting rod 433 that move longitudinally. The connecting rod 433 is located 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 connected to the rotating wheel 432. The drive assembly can drive all the rotating wheels 432 in the two eccentric adjustment assemblies to rotate synchronously by a predetermined angle, and drive the two lifting members 434 to extend downward by a predetermined length, so that the lifting members 434 act on the bearing seat and raise the frame 1 upward by a predetermined height. When the rotating wheel 432 rotates, the drive assembly can drive the lifting member 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 the preset gap s is eliminated, the support member 22 can closely adhere to the outer periphery of the circular boss 51 and support the roller body 5.

[0059] Furthermore, to make the downward movement of the lifting component 434 more stable and smooth, a lifting guide assembly is provided between the frame 1 and the lifting component 434. The lifting guide assembly includes two front-to-back guide blocks set on the frame 1, and guide plates 435 set at the front and rear ends of the lifting component 434. The guide plates 435 are made of plastic. The two guides form a guide groove, and the two guide plates 435 contact the corresponding inner walls of the guide groove and can move up and down to guide the lifting component 434.

[0060] Furthermore, in order to raise the front and rear ends of the frame 1 simultaneously, the transmission assembly includes two front-to-back rotating wheels 432, and the number of connecting rods 433 corresponds to the number of rotating wheels 432; thus raising the front and rear ends of the frame 1 simultaneously.

[0061] Furthermore, the drive assembly needs to simultaneously drive two sets of front-to-back opposing rotating wheels 432 in the two eccentric adjustment assemblies to rotate simultaneously. To meet this requirement, the rotating wheel 432 is a rotating 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 the rotating gear on the left or right. The drive shaft 41 acts directly or indirectly on 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 multiple rotating wheels 432 to rotate at a predetermined angle and stop at the corresponding position. To ensure the lifting effect of the frame 1, the transmission assembly includes two front-to-back opposing rotating gears. The number of connecting rods 433 corresponds to the number of rotating gears, and the corresponding drive gear 431 meshes with the two front-to-back opposing rotating gears on the left or right simultaneously.

[0062] Furthermore, ideally, the drive shaft 41 could be directly connected to one of the drive gears 431. However, to prevent the lifting component 434 from accidentally resetting upwards and causing the preset gap s to reappear, in this embodiment, the drive shaft 41 acts indirectly on one of the drive gears 431. Specifically, a self-locking transmission component is provided between the drive shaft 41 and the corresponding drive gear 431. The self-locking transmission component is a worm gear transmission box 42, which contains a worm wheel and a worm connected in transmission. Its specific structure is similar to that in a worm gear reducer and belongs to the prior art. This will not be elaborated further; the worm gear transmission box 42 has an input end and an output end, and an output shaft 438 is provided at the output end. The drive shaft 41 is connected to the input end of the worm gear transmission box 42, and the corresponding drive gear 431 is connected to the output shaft 438 at the output end of the worm gear transmission box 42; after the drive gear 431 rotates to the position, due to the self-locking characteristic of the worm gear, the worm gear transmission box 42 restricts the drive gear 431 from rotating in the opposite direction, so that the two rotating wheels 432 stop at the predetermined position; preventing the rotating wheels 432 from reversing, so that the lifting component 434 is kept in the state of extending downward and raising the machine base 1.

[0063] Furthermore, the eccentric rotational connection structure between the rotating wheel 432 and the connecting rod 433 is as follows: the rotating wheel 432 has a central hole 432b in the middle, and the connecting rod 433 has a shaft hole at the upper end. An eccentric assembly is installed in the shaft hole. The eccentric assembly includes a drive shaft 432a and an eccentric sleeve 436. The eccentric sleeve 436 has an eccentric hole 4361 that is not concentric with the shaft hole. The drive shaft 432a passes through the eccentric hole 4361 and the central hole 432b, and is circumferentially fixed with the eccentric sleeve 436 and the rotating wheel 432. The rotating wheel 432 rotates to drive the two lifting parts 434 to extend downward. The eccentric sleeve 436 can ensure that the stress distribution of the rotating wheel 432 is uniform while forming an eccentric transmission to the connecting rod 433.

[0064] 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 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 central hole 432b. When multiple rotating wheels... When wheel 432 rotates 180 degrees synchronously, the center of the pivot hole moves directly below the center of the center hole 432b. The center of the pivot 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 pivot hole of connecting rod 433 is located at the top of the center hole in the initial state. At this time, controlling the rotating wheel 432 to rotate 180° will eliminate the preset gap s.

[0065] Furthermore, this design also ensures that the lower brush roller shaft will not deform. Specifically, after the preset gap s is eliminated, the supporting surface 221 of the support member 22 has contacted the circular boss 51 of the roller body 5. However, if the eccentricity is greater than the width of the preset gap s, and the operator accidentally exceeds the predetermined angle when rotating the control handwheel 41, it will exert an upward force on the roller body 5, causing the roller shaft stuck in the sliding seat 14 and the fixed seat 15 to deform. For example, when the width of the preset gap s is 10mm and the size of the eccentricity is also 10mm, it is only necessary to rotate the entire rotating wheel 432 by 90° to eliminate the preset gap s. When the operator accidentally rotates the rotating wheel 432 by more than 90°, the lifting member 434 will still... The roller will continue to move downwards and press against the support seat 1a, causing slight deformation of the roller shaft and affecting the service life of the lower brush roller. However, this situation will not occur when using the eccentricity in this embodiment. In this embodiment, when the preset gap s is eliminated, the center of the rotating shaft hole is already located at the bottom of the center of the central hole. When the angle of synchronous rotation of multiple 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 moves closer to the initial position, and drives the two lifting parts 434 that have been extended downwards to reset upwards. Even if the rotation angle of the rotating wheel 432 is mistakenly made to exceed 180 degrees, it will not cause the support part 22 to exert excessive force on the roller body 5, thus ensuring the structural strength and service life of the lower brush roller.

[0066] 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 22 and the roller 5 has been eliminated.

[0067] 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 rotating 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.

[0068] Furthermore, such as Figure 9As shown, ideally, the drive shaft 432a should always be concentric with the eccentric hole 4361 when it rotates. However, due to manufacturing and installation errors, the drive shaft 432a will have a slight relative displacement with the eccentric hole 4361 in the lateral direction when it rotates, which is called misalignment. To avoid the misalignment from causing a lateral force on the connecting rod 433 and affecting the smoothness of the connecting rod 433's movement, a spherical bearing 437 is installed in the shaft hole of the rotating shaft. The spherical bearing 437 is fitted on the outer wall of the eccentric sleeve 436. The contact surface between the inner and outer rings of the spherical bearing 437 is spherical. The inner ring is fitted on the outer wall of the eccentric sleeve 436. While ensuring that the drive shaft 432a rotates smoothly in the circumferential direction, the connecting rod 433 is allowed to swing relative to the drive shaft 432a in the lateral direction, thus avoiding excessive lateral force on the connecting rod 433.

[0069] 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.

[0070] Furthermore, the eccentric sleeve 436, where the spherical bearing 437 is located, also has an annular groove 4363. The annular groove 4363 can accommodate lubricant, making the rotation of the drive shaft 432a smoother. It can also serve as an installation mark, allowing the spherical bearing 437 to be quickly installed in place.

[0071] Example 2: As Figure 17 As shown, this embodiment differs from the previous embodiment in that the eccentric rotation connection structure between the rotating wheel 432 and the connecting rod 433 is different. The rotating wheel 432 has a central hole 432b in the middle, and the upper end of the connecting rod 433 has a shaft hole concentric with the central hole 432b. The rotating wheel 432 also has an eccentric hole 4361 spaced apart from the central hole 432b, and a rotating shaft passes through the eccentric hole 4361 and the shaft hole. When the rotating wheel 432 rotates, it forms a transmission structure similar to a crank-slider on the connecting rod 433, thereby driving the two lifting parts 434 to extend downwards, achieving the same eccentric transmission effect as in the previous embodiment.

[0072] Example 3: As Figure 18As shown, this embodiment differs from the above embodiments 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 left and right opposite 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 circumferentially. 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. The drive motor 443 rotates, and drives the connecting shaft 44 to rotate through gear transmission, so that the multiple rotating wheels 432 rotate at a predetermined angle and stop at the corresponding positions, achieving the same driving effect as in the above embodiments.

[0073] 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 eccentric lift adjustment device, characterized by, The driving assembly and the eccentric adjusting assemblies (43) arranged symmetrically left and right, the eccentric adjusting assemblies (43) include lifting assemblies and transmission assemblies, the transmission assemblies include rotating wheels (432) arranged on the frame (1), the lifting assemblies include lifting members (434) moving along the longitudinal direction and connecting rods (433), the connecting rods (433) are arranged between the rotating wheels (432) and the lifting members (434), the lower ends of the connecting rods (433) are hinged to the lifting members (434), and the upper ends of the connecting rods (433) are eccentrically connected with the rotating wheels (432); The driving assembly can drive all the rotating wheels (432) of the two eccentric adjusting assemblies to rotate synchronously by a predetermined angle, and drive the two lifting members (434) to extend downward by a predetermined length, so that the lifting members (434) act on the bearing seats and lift the frame (1) upward by a predetermined height.

2. An eccentric lift adjustment device according to claim 1, wherein: The transmission assemblies include two rotating wheels (432) opposite to each other in front and back, and the number of the connecting rods (433) corresponds to the number of the rotating wheels (432).

3. An eccentric lift adjustment device as claimed in claim 1, wherein: The rotating wheel (432) is a rotating gear, the driving assembly includes a driving shaft (41) and two driving gears (431), and a linkage rod (439) is connected between the two driving gears (431); the corresponding driving gear (431) is engaged with the rotating gear on the left side or the right side; the driving shaft (41) directly or indirectly acts on one of the driving gears (431), and an adjusting hand wheel (411) is connected to the outer end of the driving shaft (41); the adjusting hand wheel (411) is rotated to make the rotating wheels (432) rotate by a predetermined angle and stop at the corresponding positions.

4. An eccentric lift adjustment device as claimed in claim 3, wherein: The transmission assemblies include two rotating gears opposite to each other in front and back, and the number of the connecting rods (433) corresponds to the number of the rotating gears; the corresponding driving gear (431) is engaged with the two rotating gears opposite to each other on the left side or the right side at the same time.

5. An eccentric lift adjustment device as claimed in claim 3, wherein: A self-locking transmission member is arranged between the driving shaft (41) and the corresponding driving gear (431), the self-locking transmission member is a worm gear transmission box (42), the driving shaft (41) is connected with the input end of the worm gear transmission box (42), and the corresponding driving gear (431) is connected with the output end of the worm gear transmission box (42); after the driving gear (431) is rotated to the position, the worm gear transmission box (42) limits the reverse rotation of the driving gear (431), so that the two rotating wheels (432) stop at the predetermined positions.

6. An eccentric lift adjustment device as claimed in claim 1, wherein: The rotating wheel (432) is provided with a central hole (432b) in the middle, the upper end of the connecting rod (433) is provided with a rotating shaft hole, an eccentric assembly is arranged 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) different from the rotating shaft hole, the transmission shaft (432a) is arranged in the eccentric hole (4361) and the central hole (432b), and the transmission shaft (432a) is circumferentially fixed with the eccentric sleeve (436) and the rotating wheel (432); the rotating wheel (432) is rotated to drive the two lifting members (434) to extend downward.

7. An eccentric lift adjustment device as claimed in claim 6, wherein: The eccentric hole (4361) is eccentric to the center of the rotation shaft hole, and the eccentricity is equal to half of the predetermined height; the predetermined angle of the rotation of the plurality of rotating wheels (432) is 180 degrees; in the initial state, the center of the rotation shaft hole is directly above the center of the center hole (432b); when the plurality of rotating wheels (432) rotate by 180 degrees, the center of the rotation shaft hole moves to be directly below the center of the center hole (432b).

8. An eccentric lift adjustment device according to claim 7, wherein: When the angle of the rotation of the plurality of rotating wheels (432) is greater than 180 degrees, the center of the rotation shaft hole rotates around the center of the center hole (432b) and approaches the initial position, and drives the two lifting members (434) to be extended downward to reset upward.

9. An eccentric lift adjustment device as claimed in claim 1, wherein: The rotating wheel (432) is provided with a center hole (432b) in the middle, the upper end of the connecting rod (433) is provided with a rotation shaft hole concentric with the center hole (432b), and the rotating wheel (432) is further provided with an eccentric hole (4361) spaced from the center hole (432b), and a rotation shaft is arranged between the eccentric hole (4361) and the rotation shaft hole; the rotating wheel (432) rotates to drive the two lifting members (434) to extend downward.

10. An eccentric lift adjustment device as claimed in claim 1, wherein: The driving assembly comprises a driving motor (443) and a connecting shaft (44) arranged between the two left and right rotating wheels (432), the connecting shaft (44) is provided with a driven gear (441) sleeved thereon, the driven gear (441) is fixed along the circumference of the connecting shaft; the output end of the driving motor (443) is provided with a driving gear (442), and the driving gear (442) is engaged with the driven gear (441); the driving motor (443) rotates to rotate the plurality of rotating wheels (432) by a predetermined angle and stop at the corresponding positions.

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