A roll changing mechanism

Abstract

The utility model discloses a roll changing mechanism, including bearing assembly and roll changing assembly, bearing assembly includes bearing seat and sets up on bearing seat, and is used for the sliding seat and fixed base of the clamping lower brush roller both ends roll axle, roll changing assembly includes the support frame of placing in the upper end of bearing seat, and the support frame lower end slidingly connected with two left and right symmetrical roll seat, be equipped with the telescopic linkage between two roll seat and drive two roll seat each other close, wherein the roll seat of towards fixed base is equipped with telescopic push and reach piece, roll seat includes two front and back opposite, downwardly extending support part, and the inboard of support part is connected with the support element, and the clearance groove of open lower end is formed between two support parts, the roll body of the support element of two roll seat in roll changing assembly under the action of telescopic linkage, make the support to lower brush roller, make lower brush roller and slide seat of fixed base simultaneously, and the roll axle of lower brush roller keeps undeformed, guarantees the use quality and replacement efficiency of lower brush roller.

Description

Technical Field

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

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

[0003] When replacing the upper brush roller in the brush grinding equipment, a roller unloading trolley can be driven into the equipment for replacement. However, the lower brush roller usually can only be replaced manually. For example, in the oxide scale treatment device with announcement number CN216371592, the support seat is equipped with two bearing seats, one of which is slidable and the other is fixed. The two bearing seats can be regarded as a sliding seat and a fixed seat, respectively. The roller shafts at both ends of the lower brush roller are respectively inserted into the sliding seat and the fixed seat. Since there is no space for roller replacement at the lower end of the lower brush roller, the support seat needs to be... When replacing the brush roller outside the support frame, to prevent the lower brush roller from deforming when the sliding seat is disengaged, workers need to use slings to suspend the brush roller to keep it stable. However, the slings are flexible and their lifting force is difficult to control, making it difficult to fully suspend the lower brush roller into place. If the upward lifting force is too large, the sliding seat and the roller shaft will become stuck and difficult to disengage. If the upward lifting force is too small, the lower brush roller will tilt downward under the action of gravity when the sliding seat is disengaged, causing the roller shaft stuck in the fixed seat to deform. Summary of the Invention

[0004] This utility model provides a roller changing mechanism. By setting a roller changing assembly at the upper end of the support seat, the two roller seats in the roller changing assembly, under the action of the telescopic linkage, make the support member support the roller body of the lower brush roller. While the lower brush roller is separated from the fixed seat and the sliding seat, the roller shaft of the lower brush roller does not change shape, thus ensuring the quality of use and replacement efficiency of the lower brush roller.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A roller changing mechanism, comprising:

[0007] The support assembly includes a support base and a sliding seat and a fixed seat disposed on the support base for clamping the roller shafts at both ends of the lower brush roller. The sliding seat can slide along the length direction of the lower brush roller.

[0008] The roller changing assembly includes a support frame placed on the upper end of the carrier, with two symmetrical roller seats slidably connected to the lower end of the support frame; a telescopic linkage is provided between the two roller seats to drive them closer to each other; a telescopic pushing member is provided on the roller seat facing the fixed seat; the roller seat includes two opposing, downwardly extending support parts, with a support member connected to the inner side of the support parts; an open clearance groove is formed between the two support parts; the two clearance grooves correspond to the positions of the roller shafts at both ends of the lower brush roller.

[0009] In operation, the telescopic linkage drives the two roller seats to move closer to each other and moves the two sets of front and rear opposing support parts to a predetermined position to form a rigid support for the lower brush roller body. When the sliding seat 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, causing the two roller seats to slide away from the fixed seat, so that the roller shaft at the other end of the lower brush roller disengages from the fixed seat.

[0010] Preferably, the roller seat includes a horizontal plate for sliding connection to the support frame, a support is connected to the lower end of the horizontal plate, and the lower end of the support is recessed to form two front-to-back opposing support parts and a clearance groove between the two support parts. A longitudinal plate is provided between the horizontal plate and each support part; the telescopic linkage is connected between every two left-to-right opposing longitudinal plates.

[0011] Preferably, the support member is provided with an outwardly open support groove, which includes a support surface for supporting the lower brush roller and a vertical limiting surface perpendicular to the support surface. When the two roller assemblies support the lower brush roller, the vertical limiting surfaces 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 detaches from the sliding seat and the fixed seat.

[0012] Preferably, the telescopic linkage component is a linkage cylinder, which includes a cylinder body that is hinged to two roller seats respectively and a telescopic rod that moves within the cylinder body. The piston rod extends and retracts, bringing the two roller seats closer to each other to a predetermined position. The hinged design can prevent the linkage cylinder from jamming when it operates.

[0013] As a preferred option, the telescopic pushing component is a pushing cylinder, and the support frame is a frame structure. The frame structure is equipped with a hydraulic station that is connected to both the linkage cylinder and the pushing cylinder through hydraulic oil pipes. The hydraulic station is set up inside the frame structure without occupying space, ensuring the operation of the linkage cylinder and the pushing cylinder while optimizing the layout space.

[0014] Preferably, the two roller seats are connected by a telescopic linkage to form a synchronously movable roller seat assembly. A positioning component is provided between the support frame and the roller seat assembly. The positioning component includes an adjusting rack and an adjusting gear respectively mounted on the support frame and the roller seat assembly. A control lever is mounted on the adjusting gear, and a control handwheel exposed on the support frame is mounted on the outer end of the control lever. Rotating the control handwheel causes the two roller seats to move synchronously in the left and right directions and stop at the corresponding positions, so that the two roller seats are symmetrical about the left and right with the lower brush roller as the reference before changing the roller. This avoids the phenomenon that one end of the lower brush roller body is supported while the other end is not.

[0015] Preferably, when the two roller seats approach each other to a predetermined position, a preset gap is formed between the support member and the roller body of the lower brush roller; the support frame is also provided with a gap compensation mechanism, which includes a drive assembly and an eccentric adjustment assembly symmetrically arranged on the support frame. The eccentric adjustment assembly includes a lifting compensation assembly and a transmission assembly. The transmission assembly includes a set of front-to-back opposing transmission wheels arranged on the support frame. The lifting compensation assembly includes a lifting plate and a set of connecting rods arranged between the lifting plate and the two front-to-back opposing transmission wheels. The lower end of each connecting rod is hinged to the lifting plate, and the upper end of the connecting rod is eccentrically rotated with the corresponding transmission wheel. The drive assembly can drive the two sets of left-to-right opposing transmission wheels to rotate synchronously by a predetermined angle, so that the two lifting plates act downward on the support seat and lift the support frame to a predetermined height, thereby eliminating the preset gap between the support member and the roller body.

[0016] Preferably, the transmission wheel is a transmission gear, and the drive assembly includes a drive shaft and two drive gears, with a linkage connecting the two drive gears; the corresponding drive gear meshes simultaneously with each pair of front and rear opposing transmission gears; the drive shaft is directly or indirectly connected to one of the drive gears, and an adjusting handwheel is connected to the outer end of the drive shaft. Rotating the adjusting handwheel causes multiple transmission wheels to rotate synchronously at a predetermined angle and stop at the corresponding position, thereby eliminating the pre-set gap between the support member and the roller body, and ensuring that the support member supports the roller body.

[0017] Preferably, a self-locking transmission component is provided between the drive shaft and the corresponding drive gear. This self-locking transmission component is a worm gear transmission box, with the drive shaft connected to the input end of the worm gear transmission box and the corresponding drive gear connected to the output end. After the drive gear rotates to its designated position, the worm gear transmission box restricts the drive gear from rotating in the opposite direction, keeping both transmission wheels at a predetermined position. This prevents the lifting plate from retracting upwards due to reverse rotation of the transmission wheels.

[0018] Preferably, the upper end of the connecting rod is provided with a pivot hole, and an eccentric assembly is installed in the pivot hole. The eccentric assembly includes a drive shaft and an eccentric sleeve. The eccentric sleeve is provided with an eccentric hole that is not concentric with the pivot hole. One end of the drive shaft is connected to the drive wheel, and the other end of the drive shaft passes through the eccentric hole and is circumferentially fixed to the eccentric sleeve. The drive wheel rotates to drive the lifting plate to act on the bearing seat downward. The eccentric sleeve can rely on the rotation of the drive wheel to form an eccentric drive on the connecting rod, eliminating the need to open an eccentric through hole on the drive wheel. This ensures that the stress distribution of the drive wheel is uniform, and while driving the lifting plate to move downward, it reduces the probability of damage to the drive wheel and the maintenance cost.

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

[0020] This invention features a roller replacement assembly installed on the upper end of the support seat. Under the action of the telescopic linkage, the two roller seats support the lower brush roller body. After the sliding seat disengages from one end of the lower brush roller, the telescopic pusher presses against the fixed seat, causing the fixed seat to disengage from the other end of the lower brush roller. While the lower brush roller disengages from the fixed seat and the sliding seat, the roller shaft of the lower brush roller remains unchanged, ensuring the quality of the removed lower brush roller and improving the replacement efficiency of the lower brush roller. Attached Figure Description

[0021] Figure 1 This is a structural diagram of the roller changing assembly;

[0022] Figure 2 This is a schematic diagram of the roller changing assembly from another angle;

[0023] Figure 3 A cross-sectional view of the roller body supporting the lower brush roller, with two front and rear opposing support members.

[0024] Figure 4 This is a schematic diagram showing the roller changing assembly placed on top of the support.

[0025] 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.

[0026] 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;

[0027] Figure 7 The structural diagram of the clearance compensation mechanism is omitted after the support frame is removed;

[0028] Figure 8 This is a cross-sectional view of the clearance compensation mechanism;

[0029] Figure 9 This is an enlarged sectional view of the position where the upper end of the connecting rod mates with the drive shaft;

[0030] Figure 10 An enlarged view of the pointer and dial on the support frame;

[0031] Figure 11 This is a schematic diagram of the eccentric sleeve structure;

[0032] Figure 12 This is a schematic diagram of the positioning adjustment component;

[0033] Figure 13 A structural diagram showing how two roller supports hold up the lower brush roller;

[0034] Figure 14 This is a schematic diagram of the roller holder structure;

[0035] Figure 15 A simplified diagram illustrating the principle of the roller changing assembly changing rollers at the upper end of the support.

[0036] Figure 16 A comparison diagram showing the presence of the preset gap and the elimination of the preset gap;

[0037] The reference numerals in the attached drawings are as follows: 1-Support frame, 1a-Bearing seat, 2-Roller seat, 3-Pushing cylinder, 4-Clearance compensation 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-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, 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

[0038] 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.

[0039] 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.

[0040] like Figure 1-16 As shown, the specific embodiments of this utility model are as follows:

[0041] This embodiment provides a roller changing mechanism, including:

[0042] 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.

[0043] The roller changing assembly includes a support frame 1 placed on the upper end of the support seat 1a. In this embodiment, the support 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 support 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. An open clearance groove 241 is formed between the two support parts 24. The two clearance grooves 241 correspond to the positions of the roller shafts at both ends of the lower brush roller.

[0044] 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.

[0045] 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.

[0046] 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 support frame 1. In order to ensure that the hoisted roller changing assembly is kept horizontal, the support frame 1 is provided 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 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.

[0047] Furthermore, to ensure that the roller changing assembly 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 support frame 1 and the support seat 1a. The front-to-back guide mechanism includes an elastic guide wheel 17 mounted on the support frame 1 and a guide block mounted on the support seat 1a. The left-to-right guide mechanism includes a guide seat 16 mounted on the support frame 1 and a guide column mounted 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-to-back guide mechanism and the left-to-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.

[0048] 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 support 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 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 extension is connected between every two left-to-right opposing longitudinal plates 26. The linkage component is retracted to allow 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.

[0049] 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.

[0050] Furthermore, such as Figure 13-14 As shown, to ensure the lower brush roller remains stable when it disengages from the sliding seat 14 and the fixed seat 15, 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.

[0051] 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.

[0052] 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.

[0053] Furthermore, such as Figure 6-7As shown, the linkage cylinder 21 and the push cylinder 3 require hydraulic oil to drive them during operation. Therefore, the support frame 1 in this embodiment is a frame structure. The frame structure is equipped with a hydraulic station 18 that is connected to both the linkage cylinder 21 and the push cylinder 3 through hydraulic oil pipes. The hydraulic station 18 can output hydraulic oil to drive the linkage cylinder 21 and the push cylinder 3. The hydraulic station 18 is an existing hydraulic component, and its specific principle will not be described in detail. The frame structure has multiple connected windows on its four side walls and upper and lower end faces. The windows on the upper end face and four side walls are 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.

[0054] 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 support 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 assemblies can simultaneously support the circular bosses 51 at both ends of the roller, such as Figure 12 As shown, a positioning assembly is provided between the support frame 1 and the roller seat assembly. The positioning assembly includes an adjusting rack 231 and an adjusting gear 232 respectively installed on the support frame 1 and the roller seat assembly. A control rod is installed on the adjusting gear 232, and a rotating shaft sleeve 252 is installed on the corresponding roller seat 2. The control rod is 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 support frame 1 is installed on the outer end of the control rod. Rotating the control handwheel 23 drives the two roller seats 2 to move synchronously in the left and right directions and stop at the corresponding positions, so that before changing the roller, the two roller seats 2 are symmetrical about 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.

[0055] Furthermore, such as Figure 16As 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 support frame 1 is also provided with a gap compensation mechanism 4. The gap compensation mechanism 4 includes a drive assembly and an eccentric adjustment assembly 43 symmetrically arranged on the support 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 members arranged on the support frame 1. 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 support frame 1 to a predetermined height, thereby eliminating the preset gap s between the support member 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 support frame 1 and raising the support 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 member 22 can closely adhere to the outer periphery of the circular boss 51 and support the roller body 5.

[0056] Furthermore, to make the downward movement of the lifting plate 434 more stable and smooth, a lifting guide assembly is provided between the support frame 1 and the lifting plate 434. The lifting guide assembly includes two front-to-back guide blocks set on the support 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.

[0057] 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 adjusting handwheel 411 is connected to the outer end of the drive shaft 41. Rotating the adjusting 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 member 22 and the roller body 5 and ensuring that the support member 22 supports the roller body 5.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] Furthermore, this design also ensures that the lower brush roller shaft will not deform. Specifically, after the preset gap s is eliminated, the supporting surface 221 of the support member 22 has contacted the circular boss 51 of the roller body 5. However, if the eccentricity is greater than the width of the preset gap s, and the operator accidentally exceeds the predetermined angle when rotating the control handwheel 41, it will exert an upward force on the roller body 5, causing the roller shaft stuck in the sliding seat 14 and the fixed seat 15 to deform. For example, when the width of the preset gap s is 10mm and the size of the eccentricity is also 10mm, it is only necessary to rotate the entire transmission wheel 432 by 90° to eliminate the preset gap s. When the operator accidentally rotates the transmission wheel 432 by more than 90°, the lifting 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, after the preset gap s is eliminated, the center of the 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 shaft hole rotates around the center of the central hole 432b and moves closer to the initial position, driving 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 22 to exert excessive force on the roller body 5, thus ensuring the structural strength and service life of the lower brush roller.

[0062] 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 support frame 1 at its outer end. The support 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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. A roller changing mechanism, characterized in that, include: 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 roller changing assembly includes a support frame (1) placed on the upper end of the support seat (1a), and two left-right symmetrical roller seats (2) are slidably connected to the lower end of the support 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 pusher is provided on the roller seat (2) facing the fixed seat (15); the roller seat (2) includes two front-to-back, downwardly extending support parts (24), and a support member (22) is connected to the inner side of the support parts (24); an open clearance groove (241) is formed between the two support parts (24); the two clearance grooves (241) correspond to the roller shaft positions at both ends of the lower brush roller respectively; In operation, the telescopic linkage drives the two roller seats (2) to approach each other and moves the two sets of front and rear opposite 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 in a direction away from the fixed seat (15), so that the roller shaft at the other end of the lower brush roller disengages from the fixed seat (15).

2. The roller changing mechanism according to claim 1, characterized in that: The roller seat (2) includes a horizontal plate (25) for sliding connection on the support frame (1). The lower end of the horizontal plate (25) is connected to a support. The lower middle part of the support is recessed to form two front-to-back 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 connected between each pair of left-to-right opposite longitudinal plates (26).

3. The roller changing mechanism according to claim 1, characterized in that: 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). 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 is separated from the sliding seat (14) and the fixed seat (15).

4. The roller changing mechanism according to claim 1, characterized in that: The telescopic linkage component is a linkage cylinder (21). The linkage cylinder (21) includes a cylinder body that is hinged to two roller seats (2) respectively and a telescopic rod that moves within the cylinder body. The piston rod extends and retracts, causing the two roller seats (2) to move closer to each other to a predetermined position.

5. A roller changing mechanism according to claim 4, characterized in that: The telescopic pushing component is a pushing cylinder (3), and the support frame (1) is a frame structure. The frame structure is equipped with a hydraulic station that is connected to both the linkage cylinder (21) and the pushing cylinder (3) through hydraulic oil pipes.

6. The roller changing mechanism according to claim 1, characterized in that: The two roller seats (2) are connected by a telescopic linkage to form a roller seat assembly that can move synchronously; a positioning component is provided between the support frame (1) and the roller seat assembly. The positioning component includes an adjusting rack (231) and an adjusting gear (232) respectively set on the support frame (1) and the roller seat assembly; a control rod is installed on the adjusting gear (232), and a control handwheel (23) exposed on the support frame (1) is installed on the outer end of the control rod; the control handwheel (23) is rotated and the two roller seats (2) are moved synchronously in the left and right directions and then stopped in the corresponding positions so that the two roller seats (2) are symmetrical about the left and right with the lower brush roller as the reference before the roller is changed.

7. A roller changing mechanism according to claim 1, characterized in that: When the two roller seats (2) approach each other to a predetermined position, a preset gap (s) is formed between the support (22) and the roller body (5) of the lower brush roller; the support frame (1) is also provided with a gap compensation mechanism (4), which includes a drive assembly and an eccentric adjustment assembly (43) symmetrically arranged on the support frame (1). The eccentric adjustment assembly (43) includes a lifting compensation assembly and a transmission assembly. The transmission assembly includes a set of front-to-back opposing transmission wheels (432) arranged on the support frame (1). The lifting compensation assembly includes a lifting plate (434) and a lifting plate (434) arranged on the support frame (1). A set of connecting rods (433) between the lifting plate (434) and two front-to-back opposing transmission wheels (432) are provided. 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 support frame (1) to a predetermined height, thereby eliminating the preset gap (s) between the support member (22) and the roller body (5).

8. A roller changing mechanism according to claim 7, characterized in that: The transmission wheel (432) is a transmission gear. The drive assembly includes a drive shaft (41) and two drive gears (431). A linkage rod (439) is connected between the two drive gears (431). The corresponding drive gear (431) meshes with each of the two front and rear opposing transmission gears simultaneously. The drive shaft (41) is directly or indirectly connected to one of the drive gears (431). An adjusting handwheel (411) is connected to the outer end of the drive shaft (41). Rotating the adjusting 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 (22) and the roller (5).

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

10. A roller changing mechanism according to claim 7, characterized in that: The upper end of the connecting rod (433) is provided with a shaft hole, and an eccentric component is installed in the shaft hole. The eccentric component includes a drive shaft and an eccentric sleeve (436). The eccentric sleeve (436) is provided with an eccentric hole (4361) that is not concentric with the shaft hole. One end of the drive shaft is connected to the drive wheel (432) for transmission, and the other end of the drive shaft passes through the eccentric hole (4361) and is circumferentially fixed with the eccentric sleeve (436). The drive wheel (432) rotates to drive the lifting plate (434) to act downward on the bearing seat (1a).

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