An adjustable centering idler mechanism

Abstract

This utility model discloses an adjustable centering idler roller mechanism, including an idler roller assembly, a telescopic linkage component, and a centering adjustment component. By setting a telescopic linkage component between two roller seats and setting a centering adjustment component between one of the roller seats and the frame, the two roller seats are connected as one unit, allowing them to move closer or further apart. This achieves precise control over the position of the two roller seats, ensuring that the two roller seats remain symmetrical at both ends of the lower brush roller of different lengths. This guarantees that the support block can be supported at the predetermined position on the roller body, improving roller changing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of strip grinding, and in particular to an adjustable centering roller mechanism. Background Technology

[0002] Steel plates, also known as strips, are rolled up and stored after production, commonly known as steel coils. Steel coils are then sent to corresponding product manufacturing plants according to different usage requirements and made into corresponding parts. During the period between the strip entering the processing plant and the strip being cut, the surface material of the strip is prone to peeling or corrosion. To remove the corrosion layer, the strip needs to be polished by the upper and lower brush rollers in the steel plate grinding and brushing equipment. Both the upper and lower brush rollers include a roller body and roller shafts located at both ends of the roller body. After a long period of polishing, the polishing effect of the brush rollers will also decrease, so the brush rollers need to be replaced.

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

[0004] To improve roller changing efficiency, the applicant has conceived of a mechanism for changing rollers from above the lower brush roller, including a frame placed on a support base. To replace lower brush rollers of different lengths, two symmetrical roller seats are slidably connected to the lower end of the frame. The roller seats are provided with two opposing support parts, and support blocks are installed on the inner side of the support parts. An open clearance groove is formed between the two support parts to avoid the roller shaft of the lower brush roller. During roller changing, the two roller seats slide and move away from each other, so that the two clearance grooves correspond to the roller shaft of the lower brush roller. Then, the two roller seats slide and move closer to each other, so that the support blocks on the two roller seats support the roller body of the lower brush roller.

[0005] However, since the two roller seats are separate structures, when one roller seat slides, the other does not slide synchronously. It is difficult to ensure that the two roller seats remain symmetrical with respect to the middle of the lower brush roller when changing rollers. If the left and right positions of the two roller seats are not symmetrical, the support block will be offset from the predetermined support position on the roller body, affecting the roller changing efficiency. If the two roller seats are directly fixedly connected, the two roller seats cannot support brush rollers of different lengths. Therefore, it is necessary to design a roller support mechanism that is widely applicable and easy to adjust and center to solve the above technical problems. Summary of the Invention

[0006] This utility model provides an adjustable centering roller mechanism. By setting a telescopic linkage between two roller seats and setting a centering adjustment component between one of the roller seats and the frame, the two roller seats are connected as one unit, allowing them to move closer or further apart. This achieves precise control over the position of the two roller seats, ensuring that the two roller seats remain symmetrical at both ends of the lower brush roller of different lengths. This guarantees that the support block can be supported at the predetermined position on the roller body, improving roller changing efficiency.

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

[0008] An adjustable centering roller mechanism, comprising:

[0009] The idler roller assembly includes a frame and two roller seats symmetrically arranged on the left and right. The roller seats are slidably connected to the lower end of the frame. Each roller seat includes two support parts that are opposite each other and extend downward. An clearance groove with an open lower end is formed between the two support parts. Support blocks are provided on the inner side of the support parts. Two support blocks that are opposite each other on each roller seat constitute a support assembly.

[0010] The telescopic linkage is connected between two roller seats. The telescopic linkage can adjust the distance between the two roller seats by its own extension and retraction.

[0011] The centering adjustment assembly is located between one of the roller seats and the frame; it includes an adjusting gear and an adjusting rack that mesh with each other. The adjusting gear is rotatably connected to one of the roller seats and the frame, and the adjusting rack is fixedly connected to the other roller seat and the frame; a control lever is connected to the adjusting gear, and a control handwheel is connected to the outer end of the control lever.

[0012] After the telescopic linkage extends, the two roller seats move away from each other, so that the two clearance grooves correspond to the positions of the two ends of the lower brush roller. At this time, rotate the control handwheel to drive the two roller seats to slide synchronously, so that the two supporting components are symmetrical about the middle of the lower brush roller.

[0013] Preferably, the adjusting rack is fixedly connected to the frame, one of the roller seats is provided with a mounting seat, the control lever is rotatably connected to the mounting seat, and the adjusting gear is connected to the inner end of the control lever.

[0014] Preferably, when the two support components are symmetrical about the middle of the lower brush roller, the telescopic linkage retracts and moves the two roller seats closer together, so that the two support components support the roller body of the lower brush roller. At this time, the control handwheel can be rotated again to drive the two roller seats to slide synchronously, so as to ensure that the support position of the two support components is symmetrical about the middle of the lower brush roller. The position of the support components is then finely adjusted again to avoid the situation where the support position is asymmetrical about the left and right.

[0015] Preferably, the roller seat includes a horizontal plate slidably connected to the lower end of the frame, two support parts connected to the lower end of the horizontal plate, and a longitudinal plate between the horizontal plate and each support part; between the two roller seats, the telescopic linkage is connected between the two left and right opposite longitudinal plates.

[0016] Preferably, there are two telescopic linkage components. There are two longitudinal plates that are opposite each other between the horizontal plate and the support. Between the two roller seats, the two telescopic linkage components are respectively connected between two sets of longitudinal plates that are opposite each other.

[0017] Preferably, the telescopic linkage component is a linkage cylinder, which includes a cylinder body connected to two roller seats respectively and a telescopic rod that moves within the cylinder body.

[0018] Preferably, the piston rod and cylinder body of the linkage cylinder are hinged to each of two opposite longitudinal plates to prevent the linkage cylinder from jamming during extension and retraction.

[0019] Preferably, the lower end of the cross plate is provided with a support, and the middle part of the lower end of the support is recessed inward, thereby forming two support parts and a clearance groove located between the two support parts.

[0020] Preferably, the support block has a support surface, which is an arc-shaped surface that matches the roller body of the corresponding lower brush roller.

[0021] Preferably, the length of the adjustable rack is in the range of 10cm-20cm.

[0022] The beneficial effects of this utility model, which adopts the above technical solution, are as follows:

[0023] This invention uses a telescopic linkage between two roller seats to allow them to move closer and further apart to accommodate lower brush rollers of different lengths on the support seat, while simultaneously connecting the two roller seats. Furthermore, a centering adjustment component is installed between one of the roller seats and the frame, allowing the two roller seats to slide synchronously in the left-right direction and be symmetrical about the center of the lower brush roller, ensuring that the support blocks on both roller seats can support the rollers at predetermined positions on the roller body, thus improving the efficiency of lower brush roller replacement.

[0024] When the support blocks on the two roller seats support the roller body, the centering adjustment component can readjust the position of the two roller seats to ensure that the support blocks on the two roller seats are symmetrical about the left and right with the middle position of the lower brush roller as a reference, thus ensuring the stability of the support of the roller seats on the roller body and avoiding the situation of asymmetrical support position. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the adjustable centering roller mechanism;

[0026] Figure 2 This is a schematic diagram of the adjustable centering roller mechanism from another angle;

[0027] Figure 3 A cross-sectional view of the roller body supporting the lower brush roller, with two opposing front and rear support blocks.

[0028] Figure 4 This is a schematic diagram of an adjustable centering roller mechanism placed on the upper end of the support seat;

[0029] 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.

[0030] 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;

[0031] Figure 7 The structural diagram of the clearance elimination mechanism is shown after the frame is hidden.

[0032] Figure 8 A cross-sectional view of the backlash elimination mechanism;

[0033] Figure 9 This is an enlarged sectional view of the position where the upper end of the connecting rod mates with the drive shaft;

[0034] Figure 10 An enlarged view of the pointer and dial on the frame;

[0035] Figure 11 This is a schematic diagram of the eccentric sleeve structure;

[0036] Figure 12 This is a schematic diagram of the centering adjustment component;

[0037] Figure 13 A structural diagram showing how two roller supports hold up the lower brush roller;

[0038] Figure 14 This is a schematic diagram of the roller holder structure;

[0039] Figure 15 This is a simplified diagram illustrating the principle of an adjustable centering roller mechanism for changing rollers at the upper end of the support seat.

[0040] Figure 16 A comparison diagram showing the presence of the preset gap and the elimination of the preset gap;

[0041] Figure 17 This is a bottom view of the adjustable centering roller mechanism;

[0042] The reference numerals in the attached drawings are as follows: 1-Frame, 1a-Bearing seat, 2-Roller seat, 3-Pushing cylinder, 4-Gap elimination mechanism, 5-Roller body, 51-Circular boss, 11-First lifting lug, 12-Second lifting lug, 13-First lifting hole, 13a-Second lifting hole, 14-Sliding seat, 15-Fixed seat, 16-Guide seat, 17-Guide wheel, 18-Hydraulic station, 21-Linkage cylinder, 22-Support block, 23-Control handwheel, 24-Support part, 25-Horizontal plate, 26-Longitudinal plate, 27-Reinforcing plate, 41-Drive shaft, 42-Worm gear transmission box, 43-Eccentric adjustment assembly, 221-Supporting surface, 222-Limiting surface 231-Adjusting rack, 232-Adjusting gear, 241-Allowing groove, 242-Abutting surface, 243-Vertical plate, 244-Connecting plate, 251-Connecting seat, 252-Rotating sleeve, 261-Fixing plate, 411-Adjusting handwheel, 412-Pointer, 413-Digital dial, 431-Drive gear, 432-Transmission wheel, 432a-Transmission shaft, 433-Connecting rod, 434-Lifting plate, 435-Guide plate, 436-Eccentric sleeve, 4361-Eccentric hole, 4362-Retaining ring groove, 4363-Annular groove, 437-Spherical bearing, 438-Output shaft, 439-Linkage rod, s-Preset clearance. Detailed Implementation

[0043] 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.

[0044] 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.

[0045] like Figure 1-17 As shown, the specific embodiments of this utility model are as follows:

[0046] This embodiment provides an adjustable centering roller mechanism for replacing the lower brush roller on the carrier assembly. The carrier assembly includes a carrier seat 1a and a sliding seat 14 and a fixed seat 15 disposed on the carrier seat 1a and used to clamp the roller shafts at both ends of the lower brush roller. The sliding seat 14 can slide along the length direction of the lower brush roller. The sliding seat 14 and the fixed seat 15 are disposed in a box with an opening on one side on the carrier seat 1a.

[0047] The idler roller assembly includes a frame 1 and two roller seats 2 symmetrically arranged on the left and right. In this embodiment, the frame 1 is placed on the upper end of the housing. The roller seats 2 are slidably connected to the lower end of the frame 1. The roller seats 2 include two support parts 24 that are opposite to each other and extend downward. A clearance groove 241 with an open lower end is formed between the two support parts 24. The inner side of the support part 24 is provided with a support block 22. The two support blocks 22 that are opposite to each other on each roller seat 2 constitute a support assembly.

[0048] The telescopic linkage is connected between the two roller seats 2. The telescopic linkage can adjust the distance between the two roller seats 2 by its own extension and retraction. At the same time, the telescopic linkage connects the two roller seats 2 into one unit, preventing the two roller seats 2 from sliding separately.

[0049] The centering adjustment assembly is located between one of the roller seats 2 and the frame 1; it includes an adjusting gear 232 and an adjusting rack 231 that mesh with each other. The adjusting gear 232 is rotatably connected to one of the frame 1 and the corresponding roller seat 2, and the adjusting rack 231 is fixedly connected to the other of the frame 1 and the corresponding roller seat 2; a control lever is connected to the adjusting gear 232, and a control handwheel 23 is connected to the outer end of the control lever; considering the actual range of synchronous sliding of the two roller seats 2, the length range of the adjusting rack 231 is set to 10cm-20cm;

[0050] After the telescopic linkage extends, the two roller seats 2 move away from each other, so that the two clearance grooves 241 correspond to the positions of the two ends of the lower brush roller. At this time, rotate the control handwheel 23 to drive the two roller seats 2 to slide synchronously, so that the two supporting components are symmetrical about the middle of the lower brush roller.

[0051] Furthermore, when the two supporting components are symmetrical about the middle of the lower brush roller, the telescopic linkage drives the two roller seats 2 to move closer to each other, so that the two supporting components move to the predetermined position to support the roller body 5 of the lower brush roller, so that the roller shaft will not deform when the sliding seat 14 and the fixed seat 15 fall off the two ends of the lower brush roller. At this time, the control handwheel 23 can be rotated again to drive the two roller seats 2 to slide synchronously, so as to ensure that the supporting position of the two supporting components is symmetrical about the middle of the lower brush roller. The position of the supporting components is finely adjusted again to avoid the situation of asymmetry in the supporting position.

[0052] 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 roller seat assembly that can move synchronously; 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.

[0053] Furthermore, in this embodiment, the adjusting rack 231 is fixedly connected to the frame 1. One of the roller seats 2 is provided with a mounting base, and the control rod is rotatably connected to the mounting base. The adjusting gear 232 is connected to the inner end of the control rod. The mounting base is a rotating shaft sleeve 252 welded and fixed to the corresponding roller seat 2. The adjusting gear 232 is equipped with a control rod, which is located inside the rotating shaft sleeve 252, with both ends of the control rod protruding outside the rotating shaft sleeve 252. One end of the control rod is connected to the adjusting gear 252, and the outer end of the control rod is equipped with a control handwheel 23 exposed on the frame 1. Rotating the control handwheel 23 drives the two roller seats 2 to move synchronously in the left and right directions and then stop at the corresponding positions, so that before changing the roller, the two roller seats 2 are symmetrical about left and right based on the lower brush roller. This avoids the phenomenon that one end of the lower brush roller body 5 is supported while the other end is not.

[0054] Furthermore, the roller body 5 of the lower brush roller includes a roller for laying brush strips. The outer diameter of the roller is much larger than the outer diameter of the roller shaft. If the brush strips are not considered, the support block 22 can be supported on the roller. However, in order to avoid the support block 22 contacting the brush strips on the roller and causing the brush strips to deform, circular bosses 51 for setting the roller shaft are concentrically installed at both ends of the roller. The outer diameter of the circular bosses 51 is smaller than the outer diameter of the roller. After the two roller seats 2 approach each other to a predetermined position, in this embodiment, the support block 22 supports the roller body 5, which means that after the support block 22 moves into place with the roller seat 2, it supports the outer periphery of the circular bosses 51, ensuring that the brush strips of the lower brush roller are not deformed by the pressure of the support block 22.

[0055] Furthermore, the structure of the roller seat 2 is as follows: The roller seat 2 includes a horizontal plate 25 for sliding connection to the frame 1. A support is connected to the lower end of the horizontal plate 25. The lower end of the support is recessed in the middle to form two opposing support parts 24 and a clearance groove 241 between the two support parts 24. A longitudinal plate 26 is provided between the horizontal plate 25 and each support part 24. The telescopic linkage is a linkage cylinder 21. The linkage cylinder 21 includes a cylinder body connected to the two roller seats 2 respectively and a telescopic rod that moves within the cylinder body. The longitudinal plate 26 is both the carrier for mounting the linkage cylinder 21 and also serves to reinforce the connection between the horizontal plate 25 and the support part 24. The telescopic linkage is connected between every two opposing longitudinal plates 26, allowing the front and rear ends of the roller seat 2 to move synchronously. Two connecting ears are provided at the head end of the piston rod and the tail end of the cylinder. The width between the two connecting ears is greater than the thickness of the longitudinal plate 26. To ensure proper hinge, a fixing plate 261 is connected to the longitudinal plate 26, and hinge holes are machined on both the longitudinal plate 26 and the fixing plate 261. The fixing plate 261 can increase the thickness of the longitudinal plate 26 to compensate for the gap between the longitudinal plate 26 and the connecting ears, ensuring that the linkage cylinder 21 remains stable in the front-rear direction after it is hinged in place.

[0056] Furthermore, to ensure the structural strength of the roller seat 2, the roller seat 2 is a welded structural component. For efficient welding, a support is provided at the lower end of the horizontal plate 25. The middle part of the lower end of the support is recessed inward, thereby forming two support parts 24 and a clearance groove 241 between the two support parts 24. Compared with welding two support parts 24 at the lower end of the horizontal plate 25, this design can effectively reduce welding time. The support includes at least two vertical plates 243 spaced apart from each other. The middle part of the lower end of the two vertical plates 243 is recessed inward, thereby forming two support parts 24 and a clearance groove 241 between the two support parts 24. A connecting plate 244 is fixedly installed between every two adjacent vertical plates 243, and the connecting plate 244 and the two vertical plates 243 form a hollow structure of the support. While ensuring the structural strength of the roller seat 2, the entire roller seat 2 is made lightweight.

[0057] Furthermore, such as Figure 13-14 As shown, to ensure the stability of the lower brush roller when it disengages from the sliding seat 14 and the fixed seat 15, the support block 22 is provided with an outwardly open support groove. The support groove includes a support surface 221 for supporting the roller body 5 of the lower brush roller and a limiting surface 222 perpendicular to the support surface 221. To further fit the outer periphery of the circular boss 51 of the roller body 5, when the two support components move to the predetermined position, the distance between the limiting surfaces 222 on the left and right sides is the same as the distance between the two ends of the roller body 5 of the corresponding lower brush roller; this restricts the two ends of the roller body 5 and prevents the lower brush roller from moving laterally in the left and right directions. Here, the end face of the roller body 5 refers to the outer end face of the two circular bosses 51; when the two limiting surfaces 222 are in contact with the outer end faces of the two circular bosses 51 respectively, the support block 22 can effectively prevent the lower brush roller from moving laterally.

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

[0059] Furthermore, two linkage cylinders 21 are provided between the two roller seats 2, and two longitudinal plates 26 are provided between the horizontal plate 25 and the support part 24. The piston rod and cylinder body of each linkage cylinder 21 are respectively hinged on each of the two longitudinal plates 26 that are opposite to each other; the hinge design can prevent the piston rod from getting stuck when it extends or retracts.

[0060] Furthermore, when the support block 22 supports the roller body 5 of the lower brush roller and the sliding seat 14 slides and disengages from one end of the lower brush roller, in order to ensure that the other end of the lower brush roller quickly disengages from the fixed seat 15, the two roller seats 2 are connected by a telescopic linkage and can move synchronously in the left and right directions; one of the roller seats 2 is provided with a push cylinder 3 for acting with the fixed seat 15 and driving the two roller seats 2 to move away from the fixed seat 15 synchronously; when the push cylinder 3 is activated, it can provide the driving force for the two roller seats 2 and the lower brush roller to move away from the fixed seat 15 at the same time. When the push cylinder 3 is activated, it can act on the fixed seat 15, so that the two roller seats 2 slide in the direction away from the fixed seat 15, so that the roller shaft at the other end of the lower brush roller disengages from the fixed seat 15.

[0061] Furthermore, such as Figure 6-7 As shown, the linkage cylinder 21 and the push cylinder 3 require hydraulic oil to drive them during operation. Therefore, the frame 1 in this embodiment is a frame structure. The frame structure is equipped with a hydraulic station 18 that is connected to both the linkage cylinder 21 and the push cylinder 3 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.

[0062] Furthermore, in order to place the frame 1 on the upper end of the support seat 1a, a hoisting method is adopted in this embodiment. The slings need to be first hoisted onto the hook of the crane, and then the two ends of the slings are respectively hoisted onto the frame 1. In order to ensure that the hoisted frame 1 remains horizontal, the frame 1 is equipped with a hoisting leveling component. The hoisting leveling component includes a first lifting lug 11 and a second lifting lug 12 that are horizontally opposite each other. The first lifting lug 11 is provided with a single first lifting hole 13, and the second lifting lug 12 is provided with multiple horizontally spaced second lifting holes 13a. 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 frame 1 remains horizontal.

[0063] Furthermore, to ensure that the frame 1 is placed in place on the upper end of the support seat 1a, a front-to-back guide mechanism and a left-to-right guide mechanism are provided between the frame 1 and the support seat 1a. The front-to-back 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-to-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 frame 1 in the hoisting state can be guided to a stable position on the upper end of the support seat 1a. The specific structure of the front-to-back guide mechanism and the left-to-right guide mechanism can be referred to the corresponding content in the idler roller device patent with announcement number CN221821042, and will not be repeated here.

[0064] Furthermore, such as Figure 16 As shown, ideally, after the two opposing support blocks 22 move into position with the roller seat 2, the support blocks 22 should be aligned with the roller body 5 and closely adhere to the outer periphery of the circular boss 51. However, due to error, the position of the support blocks 22 is difficult to guarantee absolute accuracy. Therefore, to avoid interference between the support blocks 22 and the roller body 5 of the lower brush roller when they move, a preset gap s is formed between the support blocks 22 and the roller body 5 of the lower brush roller when the two roller seats 2 approach each other to the predetermined position. This preset gap s can prevent the support blocks 22 from colliding and interfering with the circular boss 51 after they move into position. However, the preset gap s makes it difficult for the support blocks 22 to contact the circular boss 51 on the roller body 5. Therefore, the frame 1 is also provided with a gap elimination mechanism 4. The gap elimination mechanism 4 includes a drive assembly and an eccentric adjustment assembly 43 symmetrically arranged on the frame 1. The eccentric adjustment assembly 43 includes a lifting compensation assembly and a transmission assembly. The transmission assembly includes a set of front and rear opposing support blocks 22 arranged on the frame 1. The corresponding transmission wheel 432, the lifting compensation assembly includes a lifting plate 434 and a set of connecting rods 433 disposed between the lifting plate 434 and two front-to-back opposing transmission wheels 432. The lower end of each connecting rod 433 is hinged to the lifting plate 434, and the upper end of the connecting rod 433 is eccentrically rotated with the corresponding transmission wheel 432. The drive assembly can drive the two sets of left-to-right opposing transmission wheels 432 to rotate synchronously by a predetermined angle, so that the two lifting plates 434 act downward on the bearing seat 1a and lift the frame 1 to a predetermined height, thereby eliminating the preset gap s between the support block 22 and the roller body 5. When the transmission wheel 432 rotates, the drive assembly can drive the lifting plate 434 to act on the bearing seat 1a through the eccentric adjustment assembly, thereby forming an upward reaction force on the frame 1 and raising the frame 1 to a predetermined height. The size of the predetermined height is the size of the preset gap s. After eliminating the preset gap s, the support block 22 can closely adhere to the outer periphery of the circular boss 51 and support the roller body 5.

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

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

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

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

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

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

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

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

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

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

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

[0076] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. Therefore, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An adjustable centering roller mechanism, characterized in that include: The idler roller assembly includes a frame (1) and two roller seats (2) symmetrically arranged on the left and right sides. The roller seats (2) are slidably connected to the lower end of the frame (1). The roller seats (2) include two support parts (24) that are opposite to each other and extend downward. A clearance groove (241) with an open lower end is formed between the two support parts (24). Support blocks (22) are provided on the inner side of the support parts (24). The two support blocks (22) that are opposite to each other on each roller seat (2) constitute a support assembly. The telescopic linkage is connected between the two roller seats (2). The telescopic linkage can adjust the distance between the two roller seats (2) by its own telescopic extension; The centering adjustment assembly is located between one of the roller seats (2) and the frame (1); it includes an adjusting gear (232) and an adjusting rack (231) that mesh with each other. The adjusting gear (232) is rotatably connected to one of the frame (1) and the corresponding roller seat (2), and the adjusting rack (231) is fixedly connected to the other of the frame (1) and the corresponding roller seat (2); a control lever is connected to the adjusting gear (232), and a control handwheel (23) is connected to the outer end of the control lever. After the telescopic linkage extends, the two roller seats (2) move away from each other, so that the two clearance grooves (241) correspond to the positions of the two ends of the lower brush roller. At this time, rotate the control handwheel (23) to drive the two roller seats (2) to slide synchronously, so that the two supporting components are symmetrical about the middle of the lower brush roller.

2. The adjustable centering roller mechanism according to claim 1, characterized in that: The adjusting rack (231) is fixedly connected to the frame (1), and a mounting seat is provided on one of the roller seats (2). The control lever is rotatably connected to the mounting seat, and the adjusting gear (232) is connected to the inner end of the control lever.

3. The adjustable centering roller mechanism according to claim 1, characterized in that: When the two supporting components are symmetrical about the middle of the lower brush roller, the telescopic linkage retracts and moves the two roller seats (2) closer to each other, so that the two supporting components support the roller body (5) of the lower brush roller. At this time, the control handwheel (23) can be rotated again to drive the two roller seats (2) to slide synchronously, so as to ensure that the supporting position of the two supporting components is symmetrical about the middle of the lower brush roller.

4. The adjustable centering roller mechanism according to claim 1, characterized in that: The roller seat (2) includes a horizontal plate (25) slidably connected to the lower end of the frame (1), two support parts (24) connected to the lower end of the horizontal plate (25), and a longitudinal plate (26) provided between the horizontal plate (25) and each support part (24); between the two roller seats (2), the telescopic linkage is connected between the two left and right opposite longitudinal plates.

5. An adjustable centering roller mechanism according to claim 4, characterized in that: There are two telescopic linkage components. There are two longitudinal plates (26) that are opposite each other between the horizontal plate (25) and the support part (24). Between the two roller seats (2), the two telescopic linkage components are respectively connected between the two sets of left and right opposite longitudinal plates (26).

6. An adjustable centering roller mechanism according to claim 1 or 4, characterized in that: The telescopic linkage component is a linkage cylinder (21), which includes a cylinder body connected to two roller seats (2) and a telescopic rod that moves within the cylinder body.

7. An adjustable centering roller mechanism according to claim 6, characterized in that: The piston rod and cylinder body of the linkage cylinder (21) are respectively hinged to each of two left and right opposite longitudinal plates (26).

8. An adjustable centering roller mechanism according to claim 4, characterized in that: The lower end of the horizontal plate (25) is provided with a support, and the middle part of the lower end of the support is recessed inward, thereby forming two support parts (24) and a relief groove (241) located between the two support parts (24).

9. An adjustable centering roller mechanism according to claim 1, characterized in that: The support block (22) has a support surface (221), which is an arc-shaped surface that matches the roller body (5) of the corresponding lower brush roller.

10. An adjustable centering roller mechanism according to claim 1, characterized in that: The length range of the adjusting rack (231) is 10cm-20cm.

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