A progressive brushroll replacement mechanism

Abstract

The application provides a progressive brush roller replacement mechanism, which comprises a base and a roller seat for supporting a brush roller, the roller seat can move forward or backward along the length direction of the roller seat on the base; a power assembly is further arranged on the base, the power assembly comprises a moving rod and a telescopic driving part, the telescopic driving part is connected with the moving rod, a plurality of forward and backward interval protrusions are arranged on the moving rod and driven by the telescopic driving part, the plurality of protrusions can be sequentially hung and matched with the hanging mechanism on the roller seat along the front side or the back side, and the roller seat is sent into or out of the grinding and brushing production line in multiple steps; the design does not need to increase the telescopic stroke of the telescopic driving part, reduces the roller replacement cost, and optimizes the space layout on the brush roller replacement mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of metal surface treatment, in particular to a progressive brush roller replacement mechanism. BACKGROUND

[0002] After the production of steel plates is completed, the steel plates will be made into corresponding parts according to different use requirements, but before the steel plates are put into the manufacturing process, a preparation time for processing the steel plates is left, and during the preparation time, the steel plates will react with moisture in the air, causing the surface material of the steel plates to rust. In order to remove the rust layer, the existing method is to use a grinding device to polish the surface of the steel plate to remove rust. This device polishes the surface of the steel plate by installing a brush roller, which has less pollution. When the device polishes the steel plate, the brush roller contacts the surface of the steel plate, and after a long time of use, the polishing effect will also decrease, so the old brush roller needs to be removed and placed on a brush roller replacement mechanism, and then a new roller is sent into the polishing device for replacement through the brush roller replacement mechanism.

[0003] The applicant designed a brush roller replacement mechanism which includes a base and a roller seat arranged on the base, and the roller seat is used to accommodate the brush roller. A driving assembly for driving the brush roller is arranged on the base. The initial driving assembly is a gear and rack mechanism arranged between the base and the roller seat. The gear is driven by a motor and drives the rack to slide, so that the roller seat slides back and forth to achieve the purpose of transporting the brush roller. However, such a structure is prone to wear of the tooth part after a long time of use, which causes the gear and rack to not fit in place, and is prone to tooth slipping and tooth breaking, which not only damages the gear and rack, but also affects the efficiency of roller replacement.

[0004] On this basis, the applicant improved the driving assembly by replacing the gear and rack mechanism and the motor with a telescopic driving component. The driving component can be a telescopic hydraulic cylinder. The piston rod of the hydraulic cylinder can be directly connected with the roller seat, and there is no problem of tooth wear, which improves the efficiency of roller replacement. However, the design structure still has deficiencies.

[0005] When the brush roller on the roller seat is transported into or out of the grinding and brushing device, the roller seat needs to slide a long distance, and the telescopic stroke of the hydraulic cylinder is limited, which makes it difficult to transport the brush roller into place at one time.

[0006] If a hydraulic cylinder with a larger telescopic stroke is used to push the roller seat, the brush roller can be transported into place, but the hydraulic cylinder with a large stroke has a high cost and occupies a large space, which also easily affects the layout of the components on the brush roller replacement mechanism. SUMMARY

[0007] In order to solve the above technical problems, the progressive brush roller replacement mechanism is characterized in that a movable rod is arranged on the base and driven by the telescopic driving element, and a plurality of front and rear spaced protrusions are arranged on the movable rod, so that the plurality of protrusions can be sequentially hung and matched with the hanging mechanism on the roller seat along the front side or the rear side, and the roller seat is gradually sent into or out of the grinding and brushing production line in multiple times; the design does not need to increase the telescopic stroke of the telescopic driving element, reduces the roller replacement cost, and optimizes the space layout of the brush roller replacement mechanism.

[0008] The technical scheme of the present application is implemented as follows:

[0009] The progressive brush roller replacement mechanism comprises a base and a roller seat for supporting the brush roller, the roller seat can move forward or backward on the base along the length direction of the roller seat; the base is further provided with a power assembly, the power assembly comprises a movable rod and a telescopic driving element, the telescopic driving element is connected with the movable rod and can drive the movable rod to stretch out forward or retract backward through the telescopic driving of the telescopic driving element; a plurality of front and rear spaced protrusions are arranged on the movable rod; the roller seat is provided with a hanging structure, and the protrusions have front and rear opposite front and rear sides;

[0010] The brush roller replacement mechanism has a moving state and a backward state; when the brush roller replacement mechanism is in the moving state, the movable rod is retracted and the front side of the last end position protrusion is matched with the hanging structure, at this time, the telescopic driving element can drive the movable rod to stretch out forward to drive the roller seat to move forward, then the telescopic driving element drives the movable rod to retract, and the front side of the next protrusion is matched with the hanging structure, and the cycle is repeated until the roller seat moves forward to the corresponding position; when the brush roller replacement mechanism is in the backward state, the movable rod stretches out forward and the rear side of the frontmost end position protrusion is matched with the hanging structure, at this time, the telescopic driving element drives the movable rod to retract backward to drive the roller seat to move backward, then the telescopic driving element drives the movable rod to stretch out forward, and the rear side of the next protrusion is matched with the hanging structure, and the cycle is repeated until the roller seat moves backward to the corresponding position.

[0011] As a preferred, the hanging structure comprises a base connected to the roller seat, the base is rotatably connected with a swing element, the swing element has a rear hook and a front hook, and the base is provided with a rear limiting piece and a front limiting piece corresponding to the positions of the rear hook and the front hook respectively;

[0012] The swing member has a rear hooking mode corresponding to the advancing state and a front hooking mode corresponding to the retreating state. When the swing member is in the rear hooking mode, the swing member rotates and makes the front hook abut against the front limiting member, at this time, the rear hook is exposed outside the base and forms a hooking cooperation with the front side surface of the corresponding protrusion. When the swing member is switched to the front hooking mode, the swing member rotates and makes the rear hook abut against the rear limiting member, at this time, the front hook is exposed outside the base and forms a hooking cooperation with the rear side surface of the corresponding protrusion. By controlling the swing of the swing member, the protrusion and the front hook or the rear hook form hooking cooperation in different directions to drive the roller seat to slide in the corresponding direction.

[0013] As preferred, when the swing member is in the rear hooking mode, the front hook abuts against the front limiting member, at this time, the swing space allowing the rear hook to swing is formed between the rear hook and the rear limiting member to allow the protrusion to cross the rear hook when the action rod is retracted. When the swing member is in the front hooking mode, the rear hook abuts against the rear limiting member, at this time, the swing space allowing the front hook to swing is formed between the front hook and the front limiting member to allow the protrusion to cross the front hook when the action rod is extended. The swing space left can prevent the protrusion from interfering when crossing the front hook or the rear hook, and the plurality of protrusions can sequentially form corresponding hooking cooperation with the front hook or the rear hook.

[0014] As preferred, the base is provided with a conversion driving member for driving the swing member, the conversion driving member can drive the swing member to swing back and forth to switch the swing member between the rear hooking mode and the front hooking mode. By controlling the conversion driving member, the swing direction of the swing member can be controlled, and the switching efficiency of the swing member is improved.

[0015] As preferred, the conversion driving member is a pneumatic cylinder, and the pneumatic cylinder has a telescopic rod for driving the swing member to swing back and forth. The telescopic rod of the pneumatic cylinder is fast and sensitive in extension and retraction, and has high switching efficiency.

[0016] As preferred, the telescopic rod and the swing member are elastically connected, the telescopic rod is extended and retracted to form an elastic force on the swing member to switch the swing member between the rear hooking mode and the front hooking mode. When the swing member is in the rear hooking mode and the protrusion crosses the rear hook, the rear hook can be elastically reset to form hooking cooperation between the front side surface of the protrusion and the rear hook. When the swing member is switched to the front hooking mode and the protrusion crosses the front hook, the front hook can be elastically reset to form hooking cooperation between the rear side surface of the protrusion and the front hook. After the telescopic rod and the swing member are elastically connected, the driving and control effect on the swing member is not affected, and the front hook or the rear hook can be elastically reset after swinging to complete the hooking cooperation with the front side surface or the rear side surface of the protrusion. When the front hook or the rear hook swings in the corresponding swing space after swinging, the elastic connection design prevents the swing member from transmitting the reverse force of the swing to the telescopic rod, effectively protecting the telescopic rod, achieving three effects at once, and the design is ingenious.

[0017] As preferred, the base is provided with a support, the swing member is rotatably connected with a shaft sleeve, the shaft sleeve is provided with a through guide hole, the telescopic rod passes through the guide hole and is slidably connected with the support; the telescopic rod is sleeved with an elastic connecting assembly, the elastic connecting assembly comprises a first compression spring and a second compression spring, the telescopic rod is provided with a boss on the side close to the cylinder, the first compression spring is arranged between the boss and the shaft sleeve and provides a reset elastic force for the rear hook, and the second compression spring is arranged between the support and the shaft sleeve and provides a reset elastic force for the rear hook.

[0018] As preferred, the rear hook and the front hook are both provided with a clamping protrusion, the front side and the rear side of the protrusion are also provided with a clamping groove, when the rear hook or the front hook cooperates with the protrusion, the clamping protrusion and the corresponding clamping groove form a clamping connection; preventing the rear hook or the front hook from being loose when cooperating with the protrusion.

[0019] As preferred, the telescopic driving member is a hydraulic cylinder or an electric push rod, the hydraulic cylinder or the electric push rod has a piston rod, the piston rod is connected with the action rod, and the distance of each extension or retraction of the piston rod is less than the total distance of the gradual sliding of the roller seat from the initial position to the corresponding position; the extension and retraction of the hydraulic cylinder or the electric push rod is not necessarily the same as the total stroke of the sliding of the entire roller seat, thereby reducing the cost and the occupied space of the telescopic driving member.

[0020] As preferred, the base is provided with support rails symmetrically arranged on both sides of the action rod, the support rails are provided with horizontally extending guide grooves on the inner sides, and the cross-sectional shape of the guide grooves is a "U" shape; the action rod has a plurality of front and rear spaced mounting sections, and the mounting sections are provided with rollers matched with the guide grooves; the plurality of rollers roll in the guide grooves and guide the extension and retraction of the action rod; through the rolling of the rollers in the guide grooves, the action rod can be stably extended or retracted.

[0021] As preferred, at least one adjusting section is arranged in the plurality of mounting sections, the adjusting section is provided with a strip-shaped groove horizontally penetrating the adjusting section, and the strip-shaped groove extends along the longitudinal direction; a wheel shaft is horizontally arranged in the strip-shaped groove, and the both ends of the wheel shaft are rotatably connected with the rollers; the outer diameter of the wheel shaft is less than the extension length of the strip-shaped groove, thereby forming a space for the wheel shaft to float up and down in the strip-shaped groove; the adjusting section is provided with an adjusting assembly, the adjusting assembly comprises two adjusting members respectively abutting on the upper and lower ends of the wheel shaft, and the adjusting members in the corresponding adjusting section can move along the longitudinal direction and act on the wheel shaft, so that the rollers float to the corresponding positions along the longitudinal direction to eliminate the contact gap between the rollers and the top wall of the guide groove; thereby preventing the action rod from being downwardly deflected when extending out of the outer end of the support rail.

[0022] Preferably, support blocks are connected to both sides of the adjustment section, and the strip groove runs horizontally through the support blocks; both the upper and lower ends of the support blocks are provided with adjustment screw holes that communicate with the strip groove, and the adjustment component is an adjustment screw that is threaded into the adjustment screw hole and acts on the wheel axle; the position adjustment of the roller can be completed simply by rotating the adjustment screw, which has high adjustment efficiency; and due to the self-locking effect of the threaded engagement, the adjustment screw can provide stable support for the wheel axle when it is adjusted to the correct position.

[0023] Preferably, the hooking structure includes a base connected to the roller seat, and a hooking pin that can elastically extend and retract along the longitudinal direction is connected to the base.

[0024] The hook pin has a rear hook mode and a front hook mode. When the hook pin is in the rear hook mode, it extends downwards elastically outside the base and engages with the front side of the corresponding protrusion. When the hook pin is switched to the front hook mode, it extends downwards elastically outside the base and engages with the rear side of the corresponding protrusion. By controlling the extension and retraction of the hook pin, the protrusion and the hook pin can engage in different directions, thereby driving the roller seat to slide in the corresponding direction.

[0025] Preferably, the hook pin can rotate along the vertical axis, and the bottom end of the hook pin has a guide slope; the guide slope can cause the hook pin to elastically retract upward when subjected to a force in the front-back direction;

[0026] When the hook pin is in the rear hook mode, the guide ramp faces forward to allow the protrusion to cross the hook pin when the actuating lever retracts; when the hook pin is in the rear hook mode, the hook pin rotates along the vertical axis and the guide ramp faces rearward to allow the protrusion to cross the hook pin when the actuating lever extends.

[0027] The beneficial effects of the present invention, which adopts the above technical solution, are as follows:

[0028] Provided that the brush roller changing mechanism can change rollers normally, for roller seats that require a long sliding stroke, only a hook structure needs to be set on the roller seat, and a power component needs to be set on the base. The power component includes an actuating rod and a telescopic drive component. The actuating rod is equipped with multiple front-to-back spaced protrusions that cooperate with the hook structure. The front and rear sides of the protrusions can form a hook-and-loop engagement with the hook structure in the front or rear direction. When the roller seat moves towards or backs towards the brush grinding production line, the actuating rod can extend and retract multiple times, so that the roller seat gradually slides to the corresponding position. This is equivalent to dividing the total sliding stroke of the roller seat into multiple small strokes. Without the need to replace the telescopic drive component with a large stroke, the efficiency of brush roller changing is guaranteed, and the layout space of the brush roller changing mechanism is optimized.

[0029] The swing member on the hanging structure can swing back and forth, causing the front hook to abut against the front limiting member or the rear hook to abut against the rear limiting member, so that the front hook or the rear hook can protrude outside the base to conform to the front side or the rear side of the convex block. When the front hook abuts against the front limiting member, there is a rotation space between the rear hook and the rear limiting member; when the rear hook abuts against the rear limiting member, there is a rotation space between the front hook and the front limiting member; the rotation space ensures that the convex block can straddle over the front hook or the rear hook, avoiding interference with the convex block, enabling multiple convex blocks to quickly form a hanging connection with the front hook or the rear hook, and making the roll changing process smooth and efficient.

[0030] The swing member is driven by a cylinder, and the telescopic rod of the cylinder is elastically connected to the swing member. The elastic connection not only ensures that the swing member can swing back and forth normally, but also enables the front hook or the rear hook to elastically reset after rotation and complete the hanging connection with the convex block. When the front hook or the rear hook rotates, due to the elastic connection design, the swing member will not transmit the reaction force to the telescopic rod of the cylinder, avoiding damage to the cylinder and indirectly reducing the maintenance cost of the brush roll replacement mechanism. This design is very ingenious and achieves three goals with one move.

[0031] To make the telescopic movement of the action rod smooth, symmetrical support rails are provided on both sides of the action rod. A guide groove with a "C" - shaped cross - section is opened on the inner side of the support rail. The action rod has multiple mounting segments, and rollers that roll in the guide groove are installed on both sides of the mounting segments. At least one mounting segment is provided with an adjustment component for adjusting the longitudinal position of the roller. The adjustment component can move the roller longitudinally and bridge the gap between the roller and the top wall of the guide groove caused by errors, so as to ensure that the action rod remains horizontal when it extends, enabling the convex block to be stably connected to the front hook or the rear hook, and further improving the efficiency of brush roll replacement. Brief Description of the Drawings

[0032] Figure 1 is a schematic structural diagram of a progressive brush roll replacement mechanism;

[0033] Figure 2 is a schematic diagram of the progressive brush roll replacement mechanism sending the roll seat into the brush grinding production line;

[0034] Figure 3 is a schematic diagram of the convex block straddling over the front hook when the action rod extends;

[0035] Figure 4 is a schematic diagram of the rear side of the convex block being connected to the front hook after the front hook resets;

[0036] Figure 5 is a schematic diagram of the action rod retracting and pulling the roll seat back;

[0037] Figure 6 is a schematic diagram of the action rod extending again and the rear side of the next convex block being connected to the front hook;

[0038] Figure 7 This is a schematic diagram showing the action lever retracting again and pulling the secondary roller seat back;

[0039] Figure 8 This is a diagram illustrating the third extension of the lever and the engagement of the rear side of the next protrusion with the front hook.

[0040] Figure 9 This is a schematic diagram showing the third retraction of the actuator lever, which pulls the roller seat back to its initial position.

[0041] Figure 10 A schematic diagram of the structure for the interaction between the actuator and the support rail;

[0042] Figure 11 A cross-sectional view of the adjustment component set on the action lever;

[0043] Figure 12 This is a side view of the actuator lever;

[0044] Figure 13 This is a cross-sectional view of the support block;

[0045] Figure 14 This is a cross-sectional view of the adjustment component mounted on the actuating lever in Embodiment 2;

[0046] Figure 15a This is a simplified diagram illustrating the downward deflection of the actuating rod under gravity after it extends beyond the support rail when there is a contact gap between the roller and the guide groove.

[0047] Figure 15b A simplified schematic diagram showing the actuating rod extending horizontally beyond the support rail after the contact gap is eliminated by the adjusting component.

[0048] Figure 16 This is a top view of the hanging structure;

[0049] Figure 17 These are sectional views of the mounting structure at the cylinder position and the swing component position, respectively.

[0050] Figure 18a This is a schematic diagram of the engagement of the hook pin with the protrusion in the rear hook mode in Embodiment 3;

[0051] Figure 18b This is a schematic diagram of the engagement between the hook pin and the protrusion after switching to the front hook mode in Example 3;

[0052] The attached figures are labeled as follows: 1-base, 2-roller seat, 3-power component, 4-grinding brush production line, 5-hanging structure, 5a-hanging pin, 5b-guide slope, 5c-spring, 11-first track plate, 12-second track plate, 31-acting rod, 32-protrusion, 32a-locking groove, 33-installation section, 33a-adjusting section, 34-roller, 35-axle, 36-support track, 37-support block, 38-adjusting screw, 39-power output component, 51-base, 52-swinging component, 52a-locking protrusion, 53-front hook, 54-rear hook, 55-... - Rear limiter, 56 - Front limiter, 57 - Cylinder, 58 - First compression spring, 58a - Second compression spring, 59 - Bushing, 311 - Strip groove, 312 - Round hole, 313 - Connecting seat, 314 - Wheel edge, 315 - Guide wheel, 321 - Front side, 322 - Rear side, 361 - Guide groove, 371 - Adjusting screw hole, 391 - Piston rod, 511 - Support, 512 - Connecting port, 513 - Rotating shaft, 571 - Telescopic rod, 572 - First step surface, 59 - Bushing, 591 - Second step surface, 592 - Countersunk hole, 593 - Guide hole, s - Gap. Detailed Implementation

[0053] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention 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.

[0054] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0055] like Figures 1-18b As shown, the present invention has multiple embodiments, and the specific implementation methods are as follows:

[0056] Example 1: This example provides a progressive brush roller replacement mechanism for unloading and loading brush rollers within a steel plate grinding production line 4. The mechanism includes a base 1 and a roller seat 2 for supporting the brush rollers. A first track plate 11 is mounted on the base 1, and a second track plate 12, which mates with the first track plate 11, is installed within the grinding production line 4. A rotating wheel is mounted on the side of the roller seat 2, and the rotating wheel rolls on the first track plate 11 and the second track plate 12, allowing the roller seat 2 to move forward or backward along its length on the base 1. A power assembly 3 is also provided on the base 1. The power assembly 3 includes an actuating rod 31 and a telescopic drive component 39. The telescopic drive component 39 is connected to the actuating rod 31 and can extend or retract the actuating rod 31 through its own telescopic movement. The actuating rod 31 has multiple protrusions 32 spaced apart. The roller seat 2 has a hook structure 5, and the protrusions 32 have a front side 321 and a rear side 322 facing each other.

[0057] The brush roller changing mechanism has a traveling state and a retracting state. The traveling state refers to the roller seat 2 moving towards the inside of the brush grinding line 4 to receive an old brush roller or to feed a new one. The retracting state refers to the roller seat 2 moving out of the brush grinding line 4. When the brush roller changing mechanism is in the traveling state, the actuating rod 31 retracts and the front side 321 of the last-end protrusion 32 engages with the hanging structure 5. At this time, the telescopic drive 39 can drive the actuating rod 31 to extend forward, driving the roller seat 2 forward. Then, the telescopic drive 39 drives the actuating rod 31 to retract, and the front side 321 of the next protrusion 32 engages with the hanging structure 5. This cycle repeats until the roller seat 2 moves forward to the corresponding position. Figures 1-9 As shown, when the brush roller replacement mechanism is in the retracted state, the actuating rod 31 extends forward and engages the rear side 322 of the foremost protrusion 32 with the hook structure 5. At this time, the telescopic drive 39 drives the actuating rod 31 to retract backward, thereby driving the roller seat 2 to retract backward. Then, the telescopic drive 39 drives the actuating rod 31 to extend forward and engages the rear side 322 of the next protrusion 32 with the hook structure 5. This cycle repeats until the roller seat 2 retracts to the corresponding position.

[0058] Furthermore, since the force direction of the protrusion 32 and the hook-up structure 5 is opposite in both the traveling and retracting states of the roller seat 2, the hook-up structure 5 has the function of changing the hook-up direction. Specifically, as shown in the figure... Figures 16-17 As shown, the hanging structure 5 includes a base 51 connected to the roller seat 2. A swing member 52 is rotatably connected to the base 51. The swing member 52 has a rear hook 54 and a front hook 53. The intersection of the front hook 53 and the rear hook 54 has a central hole. A rotating support shaft is provided on the base 51. The rotating support shaft passes through the central hole, so that the swing hook 52 can rotate back and forth on the base 51. The base 51 is provided with a rear limiting member 55 and a front limiting member 56, which correspond to the positions of the rear hook 54 and the front hook 53, respectively.

[0059] The swing member 52 has a rear hook mode corresponding to the traveling state and a front hook mode corresponding to the retracting state. When the swing member 52 is in the rear hook mode, the swing member 52 rotates and causes the front hook 53 to abut against the front limit member 56. At this time, the rear hook 54 protrudes from the base 51 and forms a hook engagement with the front side 321 of the corresponding protrusion 32. When the actuating rod 31 extends forward, the front side 321 of the protrusion 32 will move forward to the rear hook 54. Since the front limit member 56 abuts against the front hook 53, the rear hook 54 will not rotate, allowing the roller seat 2 to travel stably. When the swing member 52 switches to the front hook mode, the swing member 52 rotates and... The rear hook 54 abuts against the rear limit member 55, at which point the front hook 53 protrudes from the base 51 and forms a hook-and-loop engagement with the rear side 322 of the corresponding protrusion 32. When the actuating rod 31 retracts, the rear side 322 of the protrusion 32 will act backward on the front hook 53. Since the rear limit member 55 abuts against the rear hook 54, the front hook 53 will not rotate, allowing the roller seat 2 to retract stably. By controlling the swing member 52 to swing, the protrusion 32 can form hook-and-loop engagements with the front hook 53 or the rear hook 54 in different directions, thereby driving the roller seat 2 to slide in the corresponding direction. The ingenious design allows the roller seat 2 to switch between the traveling state and the retracting state.

[0060] Furthermore, the protrusion 32 must engage with the front hook 53 or the rear hook 54. The front hook 53 or the rear hook 54 must provide sufficient space for the protrusion 32 to move as it moves with the actuating rod 31. For example, when the front side 321 of the protrusion 32 engages with the rear hook 54, the protrusion 32 must move backward over the rear hook 54. Therefore, when the swing member 52 is in the rear hook engagement mode, the front hook 53 abuts against the front limit member 56. At this time, a swing space is formed between the rear hook 54 and the rear limit member 55, allowing the rear hook 54 to rotate. The protrusion 32 is allowed to pass over the rear hook 54 when the actuating rod 31 retracts; when the swing member 52 is in the front hook mode, the rear hook 54 abuts against the rear limit member 55. At this time, a swing space is formed between the front hook 53 and the front limit member 56, which allows the front hook 53 to rotate, so that the protrusion 32 can pass over the front hook 53 when the actuating rod 31 extends; the rotation space left can prevent the protrusion 32 from interfering when passing over the front hook 53 or the rear hook 54, so that multiple protrusions 32 can smoothly form corresponding hooking cooperation with the front hook 53 or the rear hook 54 in sequence.

[0061] Furthermore, the base 51 is equipped with a conversion drive for the swing member 52. The conversion drive can drive the swing member 52 to swing back and forth, allowing the swing member 52 to switch between rear hook mode and front hook mode. By controlling the conversion drive, the swing direction of the swing member 52 can be controlled, thereby improving the switching efficiency of the swing member 52. Specifically, the conversion drive is a cylinder 57. The base 51 has a pre-reserved pipe inlet 512 at the position of the cylinder 57 for inserting an air pipe, so as to facilitate the installation of the air pipe. The cylinder 57 has a telescopic rod 571 for swinging the swing member 52 back and forth. The telescopic rod 571 of the cylinder 57 extends and retracts quickly and sensitively, resulting in high switching efficiency.

[0062] Furthermore, to prevent the telescopic rod 571 from jamming during extension and retraction, the cylinder body of the cylinder 57 is rotatably connected to the base 51 via a rotating shaft 513. When the telescopic rod 571 extends or retracts, the cylinder 57 can rotate to adapt to the direction of movement of the telescopic rod 571.

[0063] Furthermore, the swing angles of the front hook 53 and rear hook 54 of the swing member 52 should be within a reasonable range. If the swing angle is too large, the extension length of the telescopic rod 571 needs to be increased, which requires a cylinder 57 with a large stroke. If the swing angle is too small, the front hook 53 or rear hook 54 will be difficult to fully retract or protrude from the base 51. Therefore, in this embodiment, the swing angle range of the swing member 52 is 15°-25°. Within this angle range, the extension length of the telescopic rod 571 is relatively short, which also ensures that the front hook 53 and rear hook 54 can freely switch between the two states of being protruding from the base 51 or rotating back to the base 51.

[0064] Furthermore, the telescopic rod 571 and the swing member 52 are elastically connected. The telescopic rod 571 extends and retracts, exerting an elastic force on the swing member 52, causing the swing member 52 to switch between a rear hook mode and a front hook mode. When the swing member 52 is in the rear hook mode, and the protrusion 32 passes over the rear hook 54, the rear hook 54 can elastically return to its original position, allowing the front side 321 of the protrusion 32 to engage with the rear hook 54. When the swing member 52 switches to the front hook mode, and the protrusion 32 passes over the front hook 53, the front hook 53 can elastically return to its original position, allowing the rear side 322 of the protrusion 32 to engage with the front hook 53. The front hook 53 forms a hook-and-loop engagement; after the telescopic rod 571 and the swinging member 52 form an elastic connection, it does not affect the driving and control effect of the swinging member 52, and can also allow the front hook 53 or the rear hook 54 to elastically reset after rotation, completing the hook-and-loop engagement with the front side 321 or the rear side 322 of the protrusion 32; when the front hook 53 or the rear hook 54 rotates and swings in the corresponding swing space, the elastic connection design prevents the swinging member 52 from transmitting the reaction force of the swing to the telescopic rod 571, effectively protecting the telescopic rod 571. It achieves three benefits in one go and is a clever design.

[0065] Furthermore, the telescopic rod 571 and the swing member 52 are elastically connected as follows: a support 511 is provided on the base 51, and a bushing 59 is rotatably connected to the swing member 52. The bushing 59 has a through guide hole 593, through which the telescopic rod 571 passes and is slidably connected to the support 511; an elastic connection assembly is fitted on the telescopic rod 571, which includes a first compression spring 58 and a second compression spring 58a. A boss is provided on the side of the telescopic rod 571 near the cylinder 57. The first compression spring 58 is located between the boss and the bushing 59 and provides a return force for the rear hook 54. The second compression spring 58a is located between the support 511 and the bushing 59. It provides a reset force for the rear hook 54; specifically, the side of the boss facing the bushing 59 has a first stepped surface 572, and along the insertion direction of the telescopic rod 571, the bushing 59 has countersunk holes 592 concentric with the guide hole 593 at both ends. The diameter of the countersunk hole 592 is larger than the diameter of the guide hole 593, and a second stepped surface 591 is formed at the junction with the guide hole 593. The two ends of the first compression spring 58 abut against the first stepped surface 572 and the corresponding second stepped surface 591 to provide a reset force for the rear hook 54, and the two ends of the second compression spring 58a abut against the support 511 and the corresponding second stepped surface 591 to provide a reset force for the front hook 53.

[0066] Furthermore, to prevent the protrusion 32 from easily disengaging after being engaged with the front hook 53 or the rear hook 54, thus affecting the engagement effect of the actuating rod 31 on the roller seat 2, engaging protrusions 52a are provided on both the rear hook 54 and the front hook 53, and engaging grooves 32a are also provided on the front side 321 and the rear side 322 of the protrusion 32. When the rear hook 54 or the front hook 53 engages with the protrusion 32, the engaging protrusions 52a and the corresponding engaging grooves 32a engage, preventing the rear hook 54 or the front hook 53 from loosening when engaging with the protrusion 32.

[0067] Furthermore, in this embodiment, the telescopic drive 39 is a hydraulic cylinder or an electric push rod. The hydraulic cylinder or electric push rod has a piston rod 391, and the actuating rod 31 is provided with a connecting seat 313. The piston rod 391 and the actuating rod 31 are connected through the connecting seat 313. In order to save the cost and space layout of the brush roller replacement mechanism, the telescopic drive 39 in this embodiment is a short-stroke hydraulic cylinder or electric push rod. That is to say, the distance that the piston rod 391 extends or retracts each time is less than the total distance that the roller seat 2 gradually slides from the initial position to the corresponding position. Since the actuating rod 31 in this embodiment engages with the front hook 53 or the rear hook 54 multiple times through multiple protrusions 32, the roller seat 2 gradually slides to the corresponding position in multiple times. This is equivalent to dividing the entire sliding stroke of the roller seat 2 into multiple small strokes. Therefore, the extension and retraction of the hydraulic cylinder or electric push rod does not have to be the same as the total sliding stroke of the entire roller seat 2, which reduces the cost and space occupied by the telescopic drive 39.

[0068] Furthermore, due to the harsh working environment inside the grinding brush production line 4, the linear guide mechanism with high precision and high cost is not applicable to the action rod 31. Considering the cost and the roller replacement stability of the brush roller replacement mechanism, in this embodiment, support rails 36 symmetrically arranged on both sides of the action rod 31 are provided on the base 1. A horizontally extending guide groove 361 is formed inside the support rail 36, and the cross-sectional shape of the guide groove 361 is "匚"-shaped; the support rail 36 is usually a channel steel with high structural strength and reasonable cost. The action rod 31 has multiple mounting segments 33 spaced front and rear. The mounting segment 33 refers to the length segment on the action rod 31 for mounting the roller 34. A roller 34 matching the guide groove 361 is provided on the mounting segment 33; the multiple rollers 34 roll in the guide groove 361 and form telescopic guidance for the action rod 31; by rolling the rollers 34 in the guide groove 361, the action rod 31 can be stably extended or retracted.

[0069] Furthermore, the support rail 36 needs to provide stable support for the telescopic movement of the action rod 31. However, considering the use cost and the spatial layout of the brush roller replacement mechanism, the support rail 36 cannot be too long. Therefore, in this embodiment, the ratio of the length of the support rail 36 to the length of the action rod 31 ranges from 1:1 to 10:7. That is to say, the support rail 36 can be slightly longer than the length of the action rod 31, which can not only ensure the stable telescopic movement of the action rod 31 but also optimize the use cost and spatial layout of the brush roller replacement mechanism.

[0070] Furthermore, as Figure 15a shown, in an ideal state, the outer diameter of the roller 34 matches the width of the guide groove 361. However, due to manufacturing errors and installation errors, it is difficult for the outer diameter of the roller 34 to completely match the guide groove 361. If the outer diameter of the roller 34 is too large, it cannot roll freely in the guide groove 34, affecting the smoothness of the telescopic movement of the action rod 31. Therefore, when the action rod 31 is not extended, there will be a gap s between the roller 34 in the guide groove 361 and the top wall of the guide groove 361. Due to the existence of this gap s, when the action rod 31 extends, it will extend beyond the end of the support rail 36. The extended part will deflect downward under its own gravity, making it difficult for the action rod 31 to maintain a horizontal state. If the deflection angle is too large, it will not only affect the smoothness of the retraction of the action rod 31 but may also cause the bump 32 on the action rod 31 to fail to engage with the front hook 53 or the rear hook 54, affecting the roller replacement efficiency; therefore, to avoid this phenomenon, as Figure 15bAs shown, in this embodiment, the multiple mounting sections 33 on the actuating rod 31 have at least one adjusting section 33a. The adjusting section 33a is provided with a strip groove 311 that extends laterally through the adjusting section 33a. The strip groove 311 extends longitudinally. A wheel axle 35 is transversely inserted into the strip groove 311. The two ends of the wheel axle 35 are rotatably connected to the rollers 34. The outer diameter of the wheel axle 35 is smaller than the extension length of the strip groove 311, thereby forming a space for the wheel axle 35 to float up and down within the strip groove 311. An adjusting assembly is provided on the adjusting section 33a. The adjusting assembly includes two adjusting members that abut against the upper and lower ends of the wheel axle 35 respectively. The adjusting members in the corresponding adjusting section 33a can move longitudinally and act on the wheel axle 35, causing the rollers 34 to float longitudinally to the corresponding positions, thereby eliminating the contact gap between the rollers 34 and the top wall of the guide groove 361, eliminating the tendency of the actuating rod 31 to deflect downward after extension, and keeping the actuating rod 36 in a stable horizontal state when it extends out of the support rail.

[0071] Furthermore, such as Figures 10-13 As shown, the adjusting component is configured as follows: Support blocks 37 are connected to both sides of the adjusting section 33a, and the strip groove 311 passes horizontally through the support blocks 37; adjusting screw holes 371 communicating with the strip groove 311 are provided at both the upper and lower ends of the support blocks 37; the adjusting component is an adjusting screw 38 threaded into the adjusting screw hole 371 and acting on the wheel axle 35; the position adjustment of the roller 34 can be completed simply by rotating the adjusting screw 38, resulting in high adjustment efficiency; specifically, during adjustment, first rotate the adjusting screw 38 at the upper end of the wheel axle 35... Adjust the screw 38 to separate it from the axle 35. Then, rotate the adjusting screw 38 at the lower end of the axle 35 and press the axle 35 so that it can move upward with the roller 34 until the roller 34 contacts the top wall of the guide groove 361. Finally, rotate the screw 38 at the upper end of the axle 35 again so that it acts on the axle 35 again. The upper and lower ends of the adjusted axle 35 are once again held in place by the two adjusting screws 38. Due to the self-locking effect of the threaded fit, the two adjusting screws 38 can provide stable support for the adjusted axle 35.

[0072] Furthermore, in this embodiment, not all rollers 34 have axles 35 that can float up and down. Specifically, the mounting section 33 includes an adjusting section 33a with a slot 311 and a non-adjusting section without a slot 311. The non-adjusting section also uses axles 35 to provide rotational support for the rollers 34. The difference is that the non-adjusting section has a circular hole 312 that runs horizontally through the non-adjusting section and is used to pass through the axle 35. The diameter of the circular hole 312 matches the outer diameter of the axle 35. Therefore, the rollers 34 installed on the non-adjusting section cannot float up and down. After the actuating rod 31 extends, the adjusting section 33a and the top wall of the guide groove 361 will form an upper contact point, and the rollers 34 in the non-adjusting section will form a lower contact point with the bottom wall of the guide groove 361. In order to ensure the extension and retraction stability of the actuating rod 31, the ratio of the number of adjusting sections 33a to the number of non-adjusting sections is 1:1. In this way, the number of upper contact points is the same as the number of lower contact points, making the actuating rod 31 more stable when it extends and retracts.

[0073] Furthermore, to prevent the actuating rod 31 from shifting laterally during extension and retraction, and to make its extension and retraction process smoother, anti-lateral shift structures are provided on the support rail 36 and some of the rollers 34. For example, a guide wheel 315 that can rotate along the vertical axis is provided in each guide groove 361, and the outer peripheral surfaces of the two guide wheels 315 abut against the left and right sides of the actuating rod 31 respectively to provide further extension and retraction guidance for the actuating rod 31; for example, two rollers 34 rotatably connected to the two ends of the axle 35 form a roller group on the corresponding mounting section 33; wherein in at least one roller group on the actuating rod 31, the inner side of each of the two rollers 34 is provided with a wheel edge 314 protruding from the outer peripheral edge of the roller 34, and the wheel edge 314 is attached to the inner side of the corresponding support rail 36 to prevent the actuating rod 31 from shifting laterally during extension and retraction.

[0074] Example 2: As Figure 14 As shown, the difference between this embodiment and the above embodiment is that the two leveling screws 28 in this embodiment are not set on the support block 37, but are set directly on the actuating rod 31. Specifically, the actuating rod 31 has adjustment screw holes 371 at both the upper and lower ends, and the wheel axle 35 is connected to the outside through the adjustment screw holes 371. The two adjustment screws 38 are screwed into the corresponding adjustment screw holes 371 and act on the upper and lower ends of the wheel axle 35 respectively. Rotating the leveling screws 38 can also achieve the same adjustment effect as in the above embodiment.

[0075] Furthermore, rollers 34 are installed on both sides of the actuating rod 31. Therefore, it is difficult to provide sufficient force to the axle 35 by relying solely on the adjusting screws 38 of the two upper and lower axle 35. Therefore, in this embodiment, multiple adjusting screw holes 371 with left and right intervals are provided at both the upper and lower ends of the adjusting section 33a. Multiple adjusting screws 38 are inserted into the corresponding adjusting screw holes 371 to form multiple adjusting support points on the axle 35, so that the axle 35 on the adjusting section 33a can better provide rotational support for the rollers 34.

[0076] Example 3: As Figures 18a-18b As shown, the difference between this embodiment and the above embodiment is that the hook structure 5 includes a base 51 connected to the roller seat 2. The difference is that in this embodiment, the base 51 is connected to a hook pin 5a that can elastically extend and retract in the longitudinal direction. Specifically, the base 51 is provided with a shell that allows the hook pin 5a to extend and retract in the longitudinal direction. The middle part of the hook pin 5a has an annular protrusion. A spring 5c ​​is provided between the upper end of the annular protrusion and the top of the shell, and a spring 5c ​​is also provided between the lower end of the annular protrusion and the bottom of the shell, so that the hook pin 5a can elastically extend and retract in the longitudinal direction.

[0077] The hook pin 5a has a rear hook mode and a front hook mode. When the hook pin 5a is in the rear hook mode, the hook pin 5a extends downward elastically out of the base 51 and forms a hook engagement with the front side 321 of the corresponding protrusion 32. When the hook pin 5a switches to the front hook mode, the hook pin 5a extends downward elastically out of the base 51 and forms a hook engagement with the rear side 322 of the corresponding protrusion 32. By controlling the extension and retraction of the hook pin 5a, the protrusion 32 and the hook pin 5a form hook engagements in different directions, thereby driving the roller seat 2 to slide in the corresponding direction.

[0078] Furthermore, in this embodiment, the hook pin 5a can rotate along the vertical axis, and the bottom end of the hook pin 5a has a guide slope 5b; the guide slope 5a can cause the hook pin 5a to elastically retract upward when subjected to a force in the front-back direction, thereby providing a structural basis for the protrusion 32 to cross the hook pin 5a.

[0079] When the hook pin 5a is in the rear hook mode, the guide slope 5b faces forward, allowing the protrusion 32 to cross the hook pin 5a when the actuating rod 31 retracts. The side without the guide slope 5b can form a hook engagement with the front side 321 of the protrusion 32 to pull the roller seat 2 forward. When the hook pin 5a is in the rear hook mode, the hook pin 5a can rotate along the vertical axis under the action of external force and make the guide slope 5b face backward, allowing the protrusion 32 to cross the hook pin 5a when the actuating rod 31 extends. The side without the guide slope 5b can form a hook engagement with the rear side 322 of the protrusion 32 to pull the roller seat 2 backward.

[0080] 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 spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A progressive brush roll replacement mechanism, characterized by, The brush roll replacement mechanism comprises a base (1) and a roll seat (2) for supporting the brush roll, the roll seat (2) can move forward or backward on the base (1) along the length direction of the roll seat (2); the base (1) is further provided with a power assembly (3), the power assembly (3) comprises an action lever (31) and a telescopic driving member (39), the telescopic driving member (39) can drive the action lever (31) to extend forward or retract backward through the telescopic driving; the telescopic driving member (39) is a hydraulic oil cylinder or an electric push rod, the hydraulic oil cylinder or the electric push rod has a piston rod (391), the piston rod (391) is connected with the action lever (31), and the distance of each extension or retraction of the piston rod (391) is less than the total distance of the roll seat (2) from the initial position to the corresponding position; the base (1) is provided with support rails (36) symmetrically arranged on both sides of the action lever (31), the inner side of the support rail (36) is provided with a transversely extending guide groove (361), and the cross section shape of the guide groove (361) is a " " shape; the action lever (31) has a plurality of front and rear spaced mounting sections (33), the mounting section (33) is provided with a roller (34) matched with the guide groove (361); a plurality of rollers (34) roll in the guide groove (361) and form telescopic guide for the action lever (31); the action lever (31) is provided with a plurality of front and rear spaced protrusions (32); the roll seat (2) is provided with a hanging structure (5), the protrusion (32) has a front side (321) and a rear side (322) opposite to each other; The brush roll replacement mechanism has a moving state and a backward state, when the brush roll replacement mechanism is in the moving state, the action lever (31) is retracted and the front side (321) of the last end position protrusion (32) is matched with the hanging structure (5), at this time, the telescopic driving member (39) can drive the action lever (31) to extend forward to drive the roll seat (2) to move forward, then the telescopic driving member (39) drives the action lever (31) to retract, and the front side (321) of the next protrusion (32) is matched with the hanging structure (5), and the cycle is repeated until the roll seat (2) moves forward to the corresponding position; when the brush roll replacement mechanism is in the backward state, the action lever (31) extends forward and the rear side (322) of the frontmost position protrusion (32) is matched with the hanging structure (5), at this time, the telescopic driving member (39) drives the action lever (31) to retract backward to drive the roll seat (2) to move backward, then the telescopic driving member (39) drives the action lever (31) to extend forward, and the rear side (322) of the next protrusion (32) is matched with the hanging structure (5), and the cycle is repeated until the roll seat (2) moves backward to the corresponding position.

2. A progressive brush roll replacement mechanism according to claim 1, wherein: The hanging structure (5) comprises a base (51) connected to the roll seat (2), the base (51) is rotatably connected with a swing member (52), the swing member (52) has a rear hook (54) and a front hook (53), the base (51) is provided with a rear limiting member (55) and a front limiting member (56) corresponding to the positions of the rear hook (54) and the front hook (53) respectively; The swing member (52) has a rear hooking mode corresponding to the advancing state and a front hooking mode corresponding to the retreating state. When the swing member (52) is in the rear hooking mode, the swing member (52) rotates and makes the front hook (53) abut against the front limiting member (56), at this time, the rear hook (54) is exposed outside the base (51) and forms a hooking cooperation with the front side surface (321) of the corresponding protrusion (32); when the swing member (52) is switched to the front hooking mode, the swing member (52) rotates and makes the rear hook (54) abut against the rear limiting member (55), at this time, the front hook (53) is exposed outside the base (51) and forms a hooking cooperation with the rear side surface (322) of the corresponding protrusion (32).

3. A progressive brush roll replacement mechanism according to claim 2, wherein: When the swing member (52) is in the rear hooking mode, the front hook (53) abuts against the front limiting member (56), at this time, the swing member (52) is in the rear hooking mode, the swing member (52) rotates and makes the front hook (53) abut against the front limiting member (56), at this time, the rear hook (54) is exposed outside the base (51) and forms a hooking cooperation with the front side surface (321) of the corresponding protrusion (32); when the swing member (52) is switched to the front hooking mode, the swing member (52) rotates and makes the rear hook (54) abut against the rear limiting member (55), at this time, the front hook (53) is exposed outside the base (51) and forms a hooking cooperation with the rear side surface (322) of the corresponding protrusion (32).

4. A progressive brush roll replacement mechanism according to claim 2, wherein: The base (51) is provided with a conversion driving member for driving the swing member (52), the conversion driving member can drive the swing member (52) to swing back and forth, so that the swing member (52) is switched between the rear hooking mode and the front hooking mode.

5. A progressive brush roll replacement mechanism according to claim 4, wherein: The conversion driving member is a pneumatic cylinder (57), the pneumatic cylinder (57) has a telescopic rod (571) for swinging the swing member (52) back and forth.

6. A progressive brush roll replacement mechanism according to claim 5, wherein: The telescopic rod (571) and the swing member (52) are elastically connected, the telescopic rod (571) is telescopic and forms an elastic force on the swing member (52), so that the swing member (52) is switched between the rear hooking mode and the front hooking mode; when the swing member (52) is in the rear hooking mode and the protrusion (32) crosses the rear hook (54), the rear hook (54) can be elastically reset, so that the front side surface (321) of the protrusion (32) forms a hooking cooperation with the rear hook (54); when the swing member (52) is switched to the front hooking mode and the protrusion (32) crosses the front hook (53), the front hook (53) can be elastically reset, so that the rear side surface (322) of the protrusion (32) forms a hooking cooperation with the front hook (53).

7. A progressive brush roll replacement mechanism according to claim 6, wherein: The base (51) is provided with a support (511), the swing member (52) is rotationally connected with a shaft sleeve (59), the shaft sleeve (59) is provided with a through guide hole (593), the telescopic rod (571) passes through the guide hole (593) and is slidingly connected to the support (511); the telescopic rod (571) is sleeved with an elastic connecting assembly, the elastic connecting assembly comprises a first compression spring (58) and a second compression spring (58a), one side of the telescopic rod (571) close to the air cylinder (57) is provided with a boss, the first compression spring (58) is arranged between the boss and the shaft sleeve (59) and provides a reset elastic force for the rear hook (54), and the second compression spring (58a) is arranged between the support (511) and the shaft sleeve (59) and provides a reset elastic force for the rear hook (54).

8. A progressive brush roll replacement mechanism according to claim 2, wherein: The rear hook (54) and the front hook (53) are provided with clamping protrusions (52a), the front side (321) and the rear side (322) of the protruding block (32) are also provided with clamping grooves (32a), when the rear hook (54) or the front hook (53) cooperates with the protruding block (32), the clamping protrusions (52a) and the corresponding clamping grooves (32a) form clamping.

9. A progressive brush roll replacement mechanism according to claim 1, wherein: The plurality of mounting segments (33) have at least one adjusting segment (33a), the adjusting segment (33a) is provided with a strip-shaped slot (311) which transversely penetrates the adjusting segment (33a), and the strip-shaped slot (311) extends along the longitudinal direction; the wheel shaft (35) is transversely arranged in the strip-shaped slot (311), and the two ends of the wheel shaft (35) are rotationally connected with the rollers (34); the outer diameter of the wheel shaft (35) is smaller than the extension length of the strip-shaped slot (311), thereby forming a space for the wheel shaft (35) to float up and down in the strip-shaped slot (311); the adjusting segment (33a) is provided with an adjusting assembly, the adjusting assembly comprises two adjusting members which are respectively abutted on the upper and lower ends of the wheel shaft (35), the adjusting members in the corresponding adjusting segment (33a) can move along the longitudinal direction and act on the wheel shaft (35), so that the rollers (34) are floated to the corresponding positions along the longitudinal direction, thereby eliminating the contact gap between the rollers (34) and the top wall of the guide slot (361).

10. A progressive brush roll replacement mechanism according to claim 9, wherein: The adjusting segment (33a) is connected with the support blocks (37) on both sides, and the strip-shaped slot (311) transversely penetrates the support blocks (37); the upper and lower ends of the support block (37) are provided with adjusting screw holes (371) which are in communication with the strip-shaped slot (311), and the adjusting member is an adjusting screw (38) which is screw-connected in the adjusting screw hole (371) and acts on the wheel shaft (35).

11. A progressive brush roll replacement mechanism according to claim 1, wherein: The hanging structure (5) comprises a base (51) connected to the roller seat (2), and the base (51) is connected with a hanging pin (5a) which can elastically stretch along the longitudinal direction; the hanging pin (5a) has a rear hook hanging mode and a front hook hanging mode, when the hanging pin (5a) is in the rear hook hanging mode, the hanging pin (5a) elastically stretches out of the base (51) and forms a hanging connection with the front side (321) of the corresponding protruding block (32); when the hanging pin (5a) is switched to the front hook hanging mode, the hanging pin (5a) elastically stretches out of the base (51) and forms a hanging connection with the rear side (322) of the corresponding protruding block (32).

12. A progressive brush roll replacement mechanism according to claim 11, wherein: The hooking pin (5a) can rotate along a vertical axis, and the bottom end of the hooking pin (5a) is provided with a guide inclined surface (5b); the guide inclined surface (5a) can promote the elastic retraction of the hooking pin (5a) upward when subjected to a force in the front-rear direction; When the hooking pin (5a) is in the rear hooking mode, the guide inclined surface (5b) faces the front side to allow the protrusion (32) to pass over the hooking pin (5a) when the action lever (31) is retracted; when the hooking pin (5a) is in the rear hooking mode, the hooking pin (5a) rotates along the vertical axis and makes the guide inclined surface (5b) face the rear side to allow the protrusion (32) to pass over the hooking pin (5a) when the action lever (31) is extended.

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