Progressive brush roll replacing mechanism

Abstract

The invention provides a progressive brush roll replacing mechanism which comprises a base and a roll seat used for bearing a brush roll, and the roll seat can advance forwards or retreat backwards on the base in the length direction of the roll seat. The base is further provided with a power assembly, the power assembly comprises an action rod and a telescopic driving piece, the telescopic driving piece is connected with the action rod, the action rod driven by the telescopic driving piece is arranged on the base, and the action rod is provided with a plurality of protruding blocks arranged at intervals front and back. The plurality of convex blocks can be sequentially in hanging fit with a hanging mechanism on the roller seat along the front side or the rear side, so that the roller seat is gradually fed into or discharged out of a polish-brush production line for multiple times; according to the design, the telescopic stroke of the telescopic driving piece does not need to be increased, the roller replacement cost is reduced, and the space layout on the brush roller replacement mechanism is optimized.

Description

Technical Field

[0001] The invention relates to the field of metal surface treatment, and in particular to a progressive brush roller replacement mechanism. Background Art

[0002] After the production of steel plates is completed, they will be made into corresponding parts according to different usage requirements. However, before the steel plates are put into the production process, preparation time for processing the steel plates must be reserved. During the preparation time, the steel plates will react with moisture in the air, causing rust on the surface material of the steel plates. In order to remove the rust layer, the existing method is to remove rust by grinding equipment that brushes the surface of the steel plates. This equipment physically grinds the surface of the steel plates by installing brush rollers, which has less pollution. When this equipment grinds the steel plates, the brush rollers are in contact with the surface of the steel plates. After long-term use, the grinding effect will also decrease. Therefore, the old brush rollers need to be removed and placed on the brush roller replacement mechanism, and then the new rollers are sent into the grinding equipment for replacement through the brush roller replacement mechanism.

[0003] A brush roller changing mechanism designed by the applicant includes a base and a roller seat arranged on the base, and the roller seat is used to receive the brush roller; a driving assembly for driving the brush roller is arranged on the base, and the initial driving assembly is a gear 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, so as to achieve the purpose of transporting the brush roller; but such a structure is prone to wear of its teeth after long-term use, resulting in the gear rack not fitting in place, and prone to tooth slippage and tooth breakage, which not only damages the gear rack, but also affects the efficiency of roller changing.

[0004] On this basis, the applicant made improvements to the drive assembly, replacing the gear rack mechanism and the motor with a retractable drive component. The drive component can be a retractable hydraulic cylinder, and the piston rod of the cylinder can be directly connected to the roller seat. There is no problem of tooth wear, which improves the efficiency of roller changing; but the design structure still has shortcomings.

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

[0006] If a hydraulic cylinder with a larger telescopic stroke is used to push the roller seat, although the brush roller can be transported to the right place, the hydraulic cylinder with a large stroke is more expensive, occupies a larger space, and is likely to affect the layout of parts on the brush roller replacement mechanism. Summary of the invention

[0007] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a progressive brush roller replacement mechanism, by arranging an action rod driven by a telescopic drive member on the base, and arranging a plurality of protrusions spaced front and rear on the action rod, so that the plurality of protrusions can be connected with the connecting mechanism on the roller seat in sequence along the front side or the rear side to gradually send the roller seat into or out of the brush production line in multiple times; this design does not need to increase the telescopic stroke of the telescopic drive member, reduces the cost of roller replacement, and optimizes the spatial layout of the brush roller replacement mechanism.

[0008] The technical solution of the present invention is achieved in this way: A progressive brush roller replacement mechanism comprises a base and a roller seat for supporting a brush roller, wherein the roller seat can move forward or backward on the base along its own length direction; a power assembly is also provided on the base, wherein the power assembly comprises an action rod and a telescopic driving member, wherein the telescopic driving member is connected to the action rod and can drive the action rod to extend forward or retract backward by its own telescopic movement; a plurality of protrusions arranged at intervals in front and back are provided on the action rod; a hanging structure is provided on the roller seat, wherein the protrusion has a front side surface and a rear side surface opposite to each other in front and back; The brush roller replacement mechanism has an advancing state and a retracting state. When the brush roller replacement mechanism is in the advancing state, the action rod retracts and the front side surface of the protrusion at the rearmost end position cooperates with the hanging structure. At this time, the telescopic driving member can drive the action rod to extend forward to drive the roller seat to advance forward. Then the telescopic driving member drives the action rod to retract and the front side surface of the next protrusion cooperates with the hanging structure, and this cycle is repeated until the roller seat advances forward to the corresponding position; when the brush roller replacement mechanism is in the retracting state, the action rod extends forward and the rear side surface of the protrusion at the frontmost end position cooperates with the hanging structure. At this time, the telescopic driving member drives the action rod to retract backward to drive the roller seat to retreat backward. Then the telescopic driving member drives the action rod to extend forward and the rear side surface of the next protrusion cooperates with the hanging structure, and this cycle is repeated until the roller seat retreats backward to the corresponding position.

[0009] Preferably, the hanging structure comprises a base connected to the roller seat, a swinging member is rotatably connected to the base, the swinging member has a rear hook and a front hook, and the base is provided with a rear limiter and a front limiter corresponding to the positions of the rear hook and the front hook respectively; 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 causes the front hook to abut against the front limit member. At this time, the rear hook is exposed outside the base and forms a hooking fit 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 causes the rear hook to abut against the rear limit member. At this time, the front hook is exposed outside the base and forms a hooking fit with the rear side surface of the corresponding protrusion; by controlling the swing member to swing, the protrusion is made to form a hooking fit with the front hook or the rear hook in different directions to drive the roller seat to slide along the corresponding direction.

[0010] Preferably, when the swing member is in the rear hooking mode, the front hook abuts against the front limit member, and a swinging space is formed between the rear hook and the rear limit member to allow the rear hook to rotate, so as to allow the protrusion to cross over 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 limit member, and a swinging space is formed between the front hook and the front limit member to allow the front hook to rotate, so as to allow the protrusion to cross over the front hook when the action rod is extended; the reserved rotation space can prevent the protrusion from interfering when crossing the front hook or the rear hook, so that multiple protrusions can successively form corresponding hooking cooperation with the front hook or the rear hook smoothly.

[0011] Preferably, a conversion drive member for acting on the swinging member is provided on the base, and the conversion drive member can drive the swinging member to swing back and forth, so that the swinging member switches between the rear hooking mode and the front hooking mode; by controlling the conversion drive member, the swinging direction of the swinging member can be controlled, thereby improving the switching efficiency of the swinging member.

[0012] Preferably, the conversion drive member is a cylinder having a telescopic rod for causing the swing member to swing back and forth; the telescopic rod of the cylinder has a fast and sensitive telescopic process and a high switching efficiency.

[0013] Preferably, the telescopic rod and the swing member are elastically connected, the telescopic rod is extended and retracted and forms an elastic force on the swing member, so that the swing member switches between the rear hook mode and the front hook mode; when the swing member is in the rear hook mode and the protrusion crosses the rear hook, the rear hook can be elastically reset so that the front side of the protrusion forms a hooking fit with the rear hook; when the swing member is switched to the front hook mode and the protrusion crosses the front hook, the front hook can be elastically reset so that the rear side of the protrusion forms a hooking fit with the front hook; after the telescopic rod and the swing member are elastically connected, it does not affect the driving and control effects of the swing member, and the front hook or the rear hook can be elastically reset after rotation to complete the hooking fit with the front side or rear side of the protrusion; and when the front hook or the rear hook rotates and swings in the corresponding swing space, the design of the elastic connection prevents the swing member from transmitting the reaction force of the swing to the telescopic rod, thereby effectively protecting the telescopic rod, achieving three goals in one go and having an ingenious design.

[0014] Preferably, a support is provided on the base, and a shaft sleeve is rotatably connected to the swinging member. A through guide hole is opened on the shaft sleeve, and the telescopic rod passes through the guide hole and is slidably connected to the support; an elastic connection assembly is sleeved on the telescopic rod, and the elastic connection assembly includes a first compression spring and a second compression spring. A boss is provided on the side of the telescopic rod 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.

[0015] Preferably, engaging protrusions are provided on both the rear hook and the front hook, and engaging grooves are also provided on the front side and the rear side of the convex block. When the rear hook or the front hook cooperates with the convex block, the engaging protrusions and the corresponding engaging grooves form a snap connection; this prevents loosening when the rear hook or the front hook cooperates with the convex block.

[0016] Preferably, 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, and the piston rod is connected to the action rod. Moreover, the distance that the piston rod extends or retracts each time is less than the total distance that the roller seat slides from the initial position to the corresponding position; the extension and retraction of the hydraulic cylinder or the electric push rod do not have to be the same as the total stroke of the entire roller seat sliding, reducing the cost and occupied space of the telescopic driving member.

[0017] Preferably, support tracks symmetrically arranged on both sides of the action rod are provided on the base. A laterally extending guide groove is opened on the inner side of the support track, and the cross-sectional shape of the guide groove is "匚"-shaped; the action rod has a plurality of mounting sections spaced apart from front to back, and rollers matching the guide groove are provided on the mounting sections; the plurality of rollers roll in the guide groove and form telescopic guidance for the action rod; by the rollers rolling in the guide groove, the action rod can extend or retract stably.

[0018] Preferably, at least one of the plurality of mounting sections is an adjustment section. A strip-shaped groove that horizontally penetrates the adjustment section is provided on the adjustment section, and the strip-shaped groove extends longitudinally; a wheel shaft is horizontally inserted into the strip-shaped groove, and the two ends of the wheel shaft are rotatably connected to the rollers; the outer diameter of the wheel shaft is smaller 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; an adjustment assembly is provided on the adjustment section. The adjustment assembly includes two adjustment members respectively abutting against the upper and lower ends of the wheel shaft. The adjustment members in the corresponding adjustment section can move longitudinally and act on the wheel shaft to make the rollers float longitudinally to the corresponding positions to eliminate the contact gap between the rollers and the top wall of the guide groove; to prevent the action rod from deflecting downward when it extends beyond the outer end of the support track.

[0019] Preferably, support blocks are connected to both sides of the adjustment section, and the strip-shaped groove horizontally penetrates the support blocks; adjustment screw holes communicating with the strip-shaped groove are opened at both the upper and lower ends of the support blocks, and the adjustment members are adjustment screws threadedly connected in the adjustment screw holes and acting on the wheel shaft; only by rotating the adjustment screws can the position adjustment of the rollers be completed, and the adjustment efficiency is relatively high; and due to the self-locking effect of the thread fit, the adjustment screws can stably support the wheel shaft adjusted in place.

[0020] Preferably, the hanging structure includes a base connected to the roller seat, and a hanging pin that can elastically expand and contract longitudinally is connected to the base. The hook pin has a rear hook mode and a front hook mode. When the hook pin is in the rear hook mode, the hook pin elastically extends downward from the base and forms a hooking fit with the front side of the corresponding protrusion; when the hook pin is switched to the front hook mode, the hook pin elastically extends downward from the base and forms a hooking fit with the rear side of the corresponding protrusion. By controlling the extension and retraction of the hook pin, the protrusion and the hook pin form a hook fit in different directions, so as to drive the roller seat to slide along the corresponding direction.

[0021] Preferably, the hook pin can rotate along a vertical axis, and a guiding slope is provided at the bottom end of the hook pin; the guiding slope can cause the hook pin to elastically retract upward when subjected to a force in the front-rear direction; When the hitch pin is in the rear hook mode, the guide slope faces the front side to allow the protrusion to cross the hitch pin when the actuating rod is retracted; when the hitch pin is in the rear hook mode, the hitch pin rotates along the vertical axis and makes the guide slope face the rear side to allow the protrusion to cross the hitch pin when the actuating rod is extended.

[0022] The beneficial effects of the present invention using the above technical solution are: On the premise that the brush roller replacement mechanism can change rollers normally, for roller seats that need to slide for a longer stroke, it is only necessary to set a hanging structure on the roller seat and set a power assembly on the base. The power assembly includes an action rod and a telescopic drive member. The action rod is provided with a plurality of front and rear spaced protrusions that cooperate with the hanging structure. The front and rear sides of the protrusions can form a hanging cooperation with the hanging structure in the front or rear direction. When the roller seat moves forward or retreats toward the brush production line, the action rod can be extended and retracted multiple times to make the roller seat gradually slide to the corresponding position, which is equivalent to dividing the total sliding stroke of the roller seat into a plurality of small strokes. Without replacing the telescopic drive member with a large stroke, the replacement efficiency of the brush roller is guaranteed, and the layout space of the brush roller replacement mechanism is optimized.

[0023] The swinging member on the hanging structure can swing back and forth, so that the front hook is against the front limit member or the rear hook is against the rear limit member, so that the front hook or the rear hook can be exposed outside the base to meet the front side or rear side of the protrusion. When the front hook is against the front limit member, there is a rotation space between the rear hook and the rear limit member; when the rear hook is against the rear limit member, there is a rotation space between the front hook and the front limit member; the rotation space ensures that the protrusion can cross the front hook or the rear hook to avoid interference with the protrusion, so that multiple protrusions can quickly form a hanging fit with the front hook or the rear hook, making the roller changing process smooth and efficient.

[0024] The swinging member is driven by a cylinder. The telescopic rod of the cylinder is elastically connected to the swinging member. The elastic connection not only ensures that the swinging 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 hooking cooperation with the convex block. When the front hook or the rear hook rotates, due to the elastic connection design, the swinging 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 roller replacement mechanism. This design is very ingenious and serves multiple purposes at once.

[0025] To ensure the smooth telescoping of the actuating rod, symmetrical support tracks are provided on both sides of the actuating rod. Guide grooves with a "匚"-shaped cross-section are opened on the inner sides of the support tracks. The actuating rod has multiple mounting sections, and rollers that roll in the guide grooves are installed on both sides of the mounting sections. At least one mounting section is provided with an adjusting assembly for adjusting the longitudinal position of the rollers. This adjusting assembly can move the rollers longitudinally and bridge the gap between the rollers and the top wall of the guide groove caused by errors, so as to ensure that the actuating rod remains horizontal when extending, enabling the convex block to stably hook with the front hook or the rear hook and further improving the efficiency of brush roller replacement. Description of the Drawings

[0026] Figure 1 It is a schematic structural diagram of the progressive brush roller replacement mechanism; Figure 2 It is a schematic diagram of the progressive brush roller replacement mechanism feeding the roller seat into the brush grinding production line; Figure 3 It is a schematic diagram of the convex block striding over the front hook when the actuating rod extends; Figure 4 It is a schematic diagram of the rear side of the convex block hooking with the front hook after the front hook resets; Figure 5 It is a schematic diagram of the actuating rod retracting and pulling the roller seat back; Figure 6 It is a schematic diagram of the actuating rod extending again and the rear side of the next convex block hooking with the front hook; Figure 7 It is a schematic diagram of the actuating rod retracting again and pulling the secondary roller seat back; Figure 8 It is a schematic diagram of the actuating rod extending for the third time and the rear side of the next convex block hooking with the front hook; Fig. 9 It is a schematic diagram of the actuating rod retracting for the third time and pulling the roller seat back to the initial position; Fig.10 It is a schematic structural diagram of the cooperation between the actuating rod and the support track; Fig.11 It is a cross-sectional view of the adjusting assembly arranged on the actuating rod; Fig.12 It is a side view of the actuating rod; Fig.13is a cross-sectional view of the support block; Fig.14 It is a cross-sectional view of the adjustment assembly arranged on the actuating rod in Embodiment 2; Fig.15a It is a schematic diagram showing that when there is a contact gap between the roller and the guide groove, the action rod is extended out of the support track and deflected downward by gravity; Fig.15b A schematic diagram showing that the actuating rod extends out of the supporting track and remains horizontal after the contact gap is eliminated by the adjusting member; Fig.16 is a top view of the hanging structure; Fig.17 are cross-sectional views of the hanging structure at the cylinder position and the swinging member position respectively; Fig.18a is a schematic diagram of the coupling pin cooperating with the protrusion in the rear hooking mode in Example 3; Fig.18b is a schematic diagram of the coupling pin cooperating with the protrusion after switching to the front hooking mode in Example 3; The reference numerals of the figures are as follows: 1-base, 2-roller seat, 3-power assembly, 4-brushing production line, 5-hook structure, 5a-hook pin, 5b-guide slope, 5c-spring, 11-first track plate, 12-second track plate, 31-action rod, 32-bump, 32a-clamping groove, 33-installation section, 33a-adjustment section, 34-roller, 35-axle, 36-support rail, 37-support block, 38-adjustment screw, 39-power output member, 51-base, 52-swinging member, 52a-clamping protrusion, 53-front hook, 54-rear hook, 55 -rear limit piece, 56-front limit piece, 57-cylinder, 58-first compression spring, 58a-second compression spring, 59-sleeve, 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-piston port, 513-rotating shaft, 571-telescopic rod, 572-first step surface, 59-sleeve, 591-second step surface, 592-countersunk hole, 593-guide hole, s-gap. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth to facilitate 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 protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0029] like Figure 1-18b As shown, the present invention has multiple embodiments, and the specific implementation methods are as follows: Embodiment 1: This embodiment provides a progressive brush roller replacement mechanism, which is used for unloading and loading rollers in a grinding and brushing production line 4 for steel plates, and includes a base 1 and a roller seat 2 for supporting brush rollers, a first track plate 11 is installed on the base 1, a second track plate 12 connected to the first track plate 11 is installed in the grinding and brushing production line 4, and a rotating wheel is installed 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, so that the roller seat 2 can move forward or retreat backward on the base 1 along its own length direction; the base 1 is also provided with a power assembly 3, the power assembly 3 includes an action rod 31 and a telescopic driving member 39, the telescopic driving member 39 is connected to the action rod 31, and can drive the action rod 31 to extend forward or retract backward by its own telescopic movement; the action rod 31 is provided with a plurality of protrusions 32 arranged at intervals in front and behind; the roller seat 2 is provided with a hanging structure 5, and the protrusion 32 has a front side surface 321 and a rear side surface 322 opposite to each other; The brush roller replacement mechanism has an advancing state and a retreating state. The advancing state refers to that the roller seat 2 advances toward the inside of the grinding brush production line 4 to receive the old brush roller or to feed in the new brush roller, and the retreating state refers to that the roller seat 2 drives out of the grinding brush production line 4. When the brush roller replacement mechanism is in the advancing state, the action rod 31 retracts and makes the front side surface 321 of the rearmost position protrusion 32 cooperate with the hanging structure 5. At this time, the telescopic driving member 39 can drive the action rod 31 to extend forward to drive the roller seat 2 to advance forward. Then, the telescopic driving member 39 drives the action rod 31 to retract and makes the front side surface 321 of the next protrusion 32 cooperate with the hanging structure 5, and this cycle is repeated until the roller seat 2 advances forward to the corresponding position. Figure 1-9 As shown, when the brush roller replacement mechanism is in the retracting state, the action rod 31 extends forward and makes the rear side surface 322 of the protrusion 32 at the front end position cooperate with the hanging structure 5. At this time, the telescopic driving member 39 drives the action rod 31 to retract backward to drive the roller seat 2 to retract backward. Then the telescopic driving member 39 drives the action rod 31 to extend forward and makes the rear side surface 322 of the next protrusion 32 cooperate with the hanging structure 5. This cycle is repeated until the roller seat 2 retracts backward to the corresponding position.

[0030] Furthermore, since the directions of the force received by the projection 32 and the hanging structure 5 are opposite when the roller seat 2 is in the advancing state and the retreating state, the hanging structure 5 has the function of switching the hanging direction. Specifically, Figure 16-17As shown, the hanging structure 5 includes a base 51 connected to the roller seat 2, a swinging member 52 is rotatably connected to the base 51, a rear hook 54 and a front hook 53 are provided on the swinging member 52, a center hole is provided at the intersection of the front hook 53 and the rear hook 54, a rotating support shaft is provided on the base 51, and the rotating support shaft passes through the center hole, so that the swinging hook 52 can rotate forward and backward on the base 51; a rear limiter 55 and a front limiter 56 corresponding to the positions of the rear hook 54 and the front hook 53 respectively are provided on the base 51; 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 causes the front hook 53 to abut against the front limit member 56. At this time, the rear hook 54 is exposed outside the base 51 and forms a hooking fit with the front side surface 321 of the corresponding protrusion 32. At this time, after the action rod 31 extends forward, the front side surface 321 of the protrusion 32 will act on the rear hook 54 forward. Since the front limit member 56 abuts against the front hook 53, the rear hook 54 will not rotate, so that the roller seat 2 can move stably. When the swing member 52 switches to the front hooking mode, the swing member 52 rotates and The rear hook 54 is abutted against the rear limit member 55, at which time the front hook 53 is exposed outside the base 51 and forms a hooking fit with the rear side surface 322 of the corresponding protrusion 32; at this time, after the action rod 31 retracts backward, the rear side surface 322 of the protrusion 32 will act backward on the front hook 53, and since the rear limit member 55 abuts against the rear hook 54, the front hook 53 will not rotate, so that the roller seat 2 can retreat stably; by controlling the swing member 52 to swing, the protrusion 32 and the front hook 53 or the rear hook 54 form a hooking fit in different directions, so as to drive the roller seat 2 to slide in the corresponding direction. The design is sophisticated, so that the roller seat 2 can switch between the advancing state and the retreating state.

[0031] Furthermore, the protrusion 32 should be hooked with the front hook 53 or the rear hook 54, and the front hook 53 or the rear hook 54 should make room for the protrusion 32 to move when the protrusion 32 moves with the action rod 31. For example, when the front side surface 321 of the protrusion 32 cooperates with the rear hook 54, the protrusion 32 should cross over the rear hook 54 backwards; therefore, when the swing member 52 is in the rear hooking mode, the front hook 53 abuts against the front limit member 56, and at this time, a swinging space is formed between the rear hook 54 and the rear limit member 55 to allow the rear hook 54 to rotate. To allow the protrusion 32 to cross over the rear hook 54 when the action rod 31 is retracted; when the swing member 52 is in the front hooking mode, the rear hook 54 abuts against the rear limit member 55, and at this time, a swinging space allowing the front hook 53 to rotate is formed between the front hook 53 and the front limit member 56, so as to allow the protrusion 32 to cross over the front hook 53 when the action rod 31 is extended; the reserved rotation space can prevent the protrusion 32 from interfering when crossing the front hook 53 or the rear hook 54, so that multiple protrusions 32 can form corresponding hooking cooperation with the front hook 53 or the rear hook 54 in turn.

[0032] Furthermore, a conversion drive member for acting on the swing member 52 is provided on the base 51, and the conversion drive member can drive the swing member 52 to swing back and forth, so that the swing member 52 switches between the rear hooking mode and the front hooking mode; by controlling the conversion drive member, the swinging direction of the swing member 52 can be controlled, so that the switching efficiency of the swing member 52 is improved; specifically, the conversion drive member is a cylinder 57, and the base 51 has a pipe connection port 512 reserved at the position of the cylinder 57 for passing the air pipe, so as to facilitate the installation of the air pipe; the cylinder 57 has a telescopic rod 571 for making the swing member 52 swing back and forth; the telescopic process of the telescopic rod 571 of the cylinder 57 is fast and sensitive, and the switching efficiency is high.

[0033] Furthermore, to prevent the telescopic rod 571 from getting stuck when being extended or retracted, the cylinder body of the cylinder 57 is rotatably connected to the base 51 via a rotating shaft 513. When the telescopic rod 571 is extended or retracted, the cylinder 57 can rotate to adapt to the moving direction of the telescopic rod 571.

[0034] Furthermore, the swing angles of the front hook 53 and the rear hook 54 of the swing member 52 should be within a reasonable range. If the swing angle is too large, the telescopic length of the telescopic rod 571 needs to be lengthened, which requires a cylinder 57 with a larger stroke to achieve. If the swing angle is too small, the front hook 53 or the rear hook 54 is difficult to be completely retracted or exposed 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 telescopic length of the telescopic rod 571 is relatively short, which can also ensure that the front hook 53 and the rear hook 54 can switch freely between the two states of being exposed from the base 51 or rotating to the base 51.

[0035] Furthermore, the telescopic rod 571 is elastically connected to the swing member 52, and the telescopic rod 571 is extended and retracted to form an elastic force on the swing member 52, so that the swing member 52 switches 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 switches 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 and ... The front hook 53 forms a hooking fit; after the telescopic rod 571 forms an elastic connection with the swinging member 52, it does not affect the driving and control effects of the swinging member 52, and can also make the front hook 53 or the rear hook 54 elastically reset after rotation, completing the hooking fit with the front side surface 321 or the rear side surface 322 of the protrusion 32; and when the front hook 53 or the rear hook 54 rotates and swings in the corresponding swinging space, the design of the elastic connection prevents the swinging member 52 from transmitting the reaction force of the swinging to the telescopic rod 571, effectively protecting the telescopic rod 571, achieving three goals at one stroke, and the design is ingenious.

[0036] Further, the telescopic rod 571 and the swinging member 52 are elastically connected as follows: a support 511 is provided on the base 51, a shaft sleeve 59 is rotatably connected to the swinging member 52, a through guide hole 593 is provided on the shaft sleeve 59, the telescopic rod 571 passes through the guide hole 593 and is slidably connected to the support 511; an elastic connection component is sleeved on the telescopic rod 571, and the elastic connection component includes a first compression spring 58 and a second compression spring 58a, a boss is provided on the side of the telescopic rod 571 close to the cylinder 57, 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 provide a restoring elastic force for the rear hook 54; specifically, the side of the boss facing the sleeve 59 has a first step surface 572, and along the penetration direction of the telescopic rod 571, countersunk holes 592 concentric with the guide hole 593 are opened at both ends of the sleeve 59, the diameter of the countersunk hole 592 is larger than the diameter of the guide hole 593, and a second step surface 591 is formed at the junction with the guide hole 593, the two ends of the first compression spring 58 are pressed between the first step surface 572 and the corresponding second step surface 591 to provide a restoring elastic force for the rear hook 54, and the two ends of the second compression spring 58a are pressed between the support 511 and the corresponding second step surface 591 to provide a restoring elastic force for the front hook 53.

[0037] Furthermore, in order to prevent the protrusion 32 from being easily disengaged after being engaged with the front hook 53 or the rear hook 54, thereby affecting the engaging effect of the action rod 31 on the roller seat 2, a snap-fitting protrusion 52a is provided on the rear hook 54 and the front hook 53, and a snap-fitting groove 32a is 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 is engaged with the protrusion 32, the snap-fitting protrusion 52a is engaged with the corresponding snap-fitting groove 32a, thereby preventing the rear hook 54 or the front hook 53 from loosening when engaging with the protrusion 32.

[0038] Furthermore, the telescopic drive member 39 in the present embodiment is a hydraulic cylinder or an electric push rod, which has a piston rod 391. A connecting seat 313 is provided on the action rod 31. The piston rod 391 is connected to the action rod 31 through the connecting seat 313. In order to save the cost and space layout of the brush roller replacement mechanism, the telescopic drive member 39 in the present embodiment is a hydraulic cylinder or an electric push rod with a small stroke. That is to say, the distance that the piston rod 391 is extended or retracted 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 action rod 31 in the present embodiment is repeatedly hooked and matched with the front hook 53 or the rear hook 54 through multiple protrusions 32, the roller seat 2 gradually slides to the corresponding position in multiple times, which is equivalent to dividing the sliding stroke of the entire roller seat 2 into multiple small strokes. Therefore, the telescopic formation of the hydraulic cylinder or the electric push rod does not have to be the same as the total sliding stroke of the entire roller seat 2, thereby reducing the cost and occupied space of the telescopic drive member 39.

[0039] Furthermore, due to the harsh working environment inside the grinding and brushing production line 4, the linear guide mechanism with high precision and 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 laterally 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 a plurality of installation segments 33 spaced front and rear. The installation segment 33 refers to the length segment on the action rod 31 for installing the roller 34. A roller 34 matching the guide groove 361 is provided on the installation segment 33; the plurality of 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.

[0040] 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.

[0041] Furthermore, as Fig.15a shown, in the 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 located 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 exceed 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 Fig.15bAs shown, the plurality of mounting sections 33 on the action rod 31 of the present embodiment include at least one adjustment section 33a, and the adjustment section 33a is provided with a strip groove 311 which penetrates the adjustment section 33a transversely, and the strip groove 311 extends in the longitudinal direction; a wheel shaft 35 is transversely penetrated in the strip groove 311, and the two ends of the wheel shaft 35 are rotatably connected with the rollers 34; the outer diameter of the wheel shaft 35 is smaller than the extension length of the strip groove 311, thereby forming a space for the wheel shaft 35 to float up and down in the strip groove 311; an adjustment assembly is provided on the adjustment section 33a, and the adjustment assembly includes two adjustment members respectively abutting against the upper and lower ends of the wheel shaft 35, and the adjustment member in the corresponding adjustment section 33a can move in the longitudinal direction and act on the wheel shaft 35, so that the roller 34 floats in the longitudinal direction to the corresponding position, so as to eliminate the contact gap between the roller 34 and the top wall of the guide groove 361, eliminate the tendency of the action rod 31 to deflect downward after being extended, and make the action rod 36 maintain a stable horizontal state when extending from the outer end of the support track.

[0042] Further, if Figure 10-13 As shown, the setting method of the adjustment member is as follows: support blocks 37 are connected to both sides of the adjustment section 33a, and the strip groove 311 penetrates the support block 37 horizontally; the upper and lower ends of the support block 37 are provided with adjustment screw holes 371 connected to the strip groove 311, and the adjustment member is an adjustment screw 38 that is threadedly connected in the adjustment screw hole 371 and acts on the wheel shaft 35; the position adjustment of the roller 34 can be completed by rotating the adjustment screw 38, and the adjustment efficiency is high; specifically, when adjusting, first rotate the adjustment screw 38 at the upper end of the wheel shaft 35 The adjustment screw 38 is then turned to separate it from the wheel axle 35, and the adjustment screw 38 at the lower end of the wheel axle 35 is then turned to press the wheel axle 35 so that it and the roller 34 can move upward until the roller 34 contacts the top wall of the guide groove 361, and finally the screw 38 at the upper end of the wheel axle 35 is rotated again to act on the wheel axle 35 again, and the upper and lower ends of the wheel axle 35 adjusted to the position are again supported by the two adjustment screws 38, and due to the self-locking effect of the threaded fit, the two adjustment screws 38 can form a stable support for the wheel axle 35 adjusted to the position.

[0043] Furthermore, in the present embodiment, not all axles 35 of the rollers 34 can float up and down. Specifically, the mounting section 33 includes an adjusting section 33a provided with a strip groove 311 and a non-adjusting section without the strip groove 311. The non-adjusting section also uses an axle 35 to provide rotational support for the roller 34. The difference is that a circular hole 312 is provided on the non-adjusting section, which runs through the non-adjusting section in the transverse direction and is used to pass the axle 35. The aperture of the circular hole 312 matches the outer diameter of the axle 35. Therefore, the roller 34 installed on the non-adjusting section cannot float up and down. After the action rod 31 is extended, an upper contact point will be formed between the adjusting section 33a and the top wall of the guide groove 361, and a lower contact point will be formed between the roller 34 at the non-adjusting section and the bottom wall of the guide groove 361. In order to ensure the telescopic stability of the action rod 31, the ratio of the number of adjusting sections 33a to the number of non-adjusting sections is 1:1, so that the number of upper contact points is the same as the number of lower contact points, making the action rod 31 more stable when telescoping.

[0044] Furthermore, in order to prevent the action rod 31 from shifting laterally when it is extended or retracted, and to make the retracting process smoother, an anti-lateral displacement structure is provided on the support track 36 and some rollers 34. For example, a guide wheel 315 rotatable along a vertical axis is provided in each guide groove 361, and the outer peripheral surfaces of the two guide wheels 315 are respectively against the left and right sides of the action rod 31 to form a further telescopic guide for the action rod 31; for example, two rollers 34 rotatably connected to the two ends of the wheel axle 35 form a roller group on the corresponding mounting section 33; wherein in at least one roller group on the action rod 31, the inner sides of the two rollers 34 are 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 track 36 to prevent the action rod 31 from shifting laterally when it is extended or retracted.

[0045] Example 2: Fig.14 As shown, the difference between this embodiment and the above embodiment is that the two leveling screws 28 in this embodiment are not arranged on the support block 37, but are directly arranged on the action rod 31. Specifically, the action rod 31 has adjustment screw holes 371 at the upper and lower ends, and the 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 axle 35 respectively. Rotating the leveling screws 38 can also achieve the same adjustment effect as in the above embodiment.

[0046] Furthermore, rollers 34 are installed on both sides of the action rod 31. Therefore, it is difficult to provide sufficient force for the axle 35 by only relying on the two adjusting screws 38 acting on the upper and lower axles 35. Therefore, in this embodiment, multiple adjusting screw holes 371 spaced apart from each other are provided at 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 adjustment support points on the axle 35, so that the axle 35 on the adjusting section 33a can better provide rotation support for the roller 34.

[0047] Example 3: Figure 18a-18b As shown, the difference between this embodiment and the above embodiment is that the hanging structure 5 includes a base 51 connected to the roller seat 2, and the difference is that in this embodiment, a hanging pin 5a that can be elastically extended and retracted in the longitudinal direction is connected to the base 51; specifically, a shell that allows the hanging pin 5a to be extended and retracted in the longitudinal direction is provided on the base 51, and an annular protrusion is specifically provided in the middle of the hanging pin 5a, and 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 hanging pin 5a can be elastically extended and retracted in the longitudinal direction; The hook pin 5a has a rear hooking mode and a front hooking mode. When the hook pin 5a is in the rear hooking mode, the hook pin 5a elastically extends downward from the base 51 and forms a hooking fit with the front side surface 321 of the corresponding protrusion 32; when the hook pin 5a switches to the front hooking mode, the hook pin 5a elastically extends downward from the base 51 and forms a hooking fit with the rear side surface 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 hooking fits in different directions, so as to drive the roller seat 2 to slide along the corresponding direction.

[0048] 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 guiding slope 5b; the guiding slope 5a can cause the hook pin 5a to elastically retract upward when subjected to a force in the front-rear direction, thereby providing a structural basis for the protrusion 32 to cross the hook pin 5a; When the hook pin 5a is in the rear hook mode, the guide slope 5b faces the front side to allow the protrusion 32 to cross the hook pin 5a when the action rod 31 is retracted; the side without the guide slope 5b can form a hooking fit with the front side surface 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 the rear side to allow the protrusion 32 to cross the hook pin 5a when the action rod 31 is extended; the side without the guide slope 5b can form a hooking fit with the rear side surface 322 of the protrusion 32 to pull the roller seat 2 back backward.

[0049] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A progressive brush roller replacement mechanism, characterized in that: The invention comprises a base (1) and a roller seat (2) for supporting a brush roller, wherein the roller seat (2) can move forward or backward on the base (1) along its length direction; a power assembly (3) is also provided on the base (1), wherein the power assembly (3) comprises an action rod (31) and a telescopic driving member (39), wherein the telescopic driving member (39) is connected to the action rod (31) and can drive the action rod (31) to extend forward or retract backward by itself being telescopic; a plurality of protrusions (32) are provided on the action rod (31) and are spaced apart from each other in front and back; a hanging structure (5) is provided on the roller seat (2), wherein the protrusion (32) has a front side surface (321) and a rear side surface (322) which are opposite to each other in front and back; The brush roller replacement mechanism has an advancing state and a retreating state. When the brush roller replacement mechanism is in the advancing state, the action rod (31) retracts and causes the front side surface (321) of the rearmost position protrusion (32) to cooperate with the hanging structure (5). At this time, the telescopic driving member (39) can drive the action rod (31) to extend forward to drive the roller seat (2) to move forward. Then, the telescopic driving member (39) drives the action rod (31) to retract and causes the front side surface (321) of the next protrusion (32) to cooperate with the hanging structure (5). This cycle is repeated until the roller seat (2) moves forward. When the brush roller replacement mechanism is in the retracted state, the action rod (31) extends forward and causes the rear side surface (322) of the protrusion (32) at the frontmost position to cooperate with the hanging structure (5), and at this time, the telescopic driving member (39) drives the action rod (31) to retract backward to drive the roller seat (2) to retract backward, and then the telescopic driving member (39) drives the action rod (31) to extend forward and causes the rear side surface (322) of the next protrusion (32) to cooperate with the hanging structure (5), and this cycle is repeated until the roller seat (2) retracts backward to the corresponding position.

2. A progressive brush roller replacement mechanism according to claim 1, characterized in that: The hanging structure (5) comprises a base (51) connected to the roller seat (2), a swinging member (52) being rotatably connected to the base (51), the swinging member (52) being provided with a rear hook (54) and a front hook (53), and a rear limiting member (55) and a front limiting member (56) respectively corresponding to the positions of the rear hook (54) and the front hook (53); 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 causes the front hook (53) to abut against the front limit member (56). At this time, the rear hook (54) is exposed outside the base (51) and forms a hooking fit with the front side surface (321) of the corresponding protrusion (32). When the swing member (52) switches to the front hooking mode, the swing member (52) rotates and causes the rear hook (54) to abut against the rear limit member (55). At this time, the front hook (53) is exposed outside the base (51) and forms a hooking fit with the rear side surface (322) of the corresponding protrusion (32).

3. A progressive brush roller replacement mechanism according to claim 2, characterized in that: When the swing member (52) is in the rear hooking mode, the front hook (53) abuts against the front limit member (56), and at this time, a swinging space allowing the rear hook (54) to rotate is formed between the rear hook (54) and the rear limit member (55), so as to allow the protrusion (32) to cross over the rear hook (54) when the action rod (31) is retracted; when the swing member (52) is in the front hooking mode, the rear hook (54) abuts against the rear limit member (55), and at this time, a swinging space allowing the front hook (53) to rotate is formed between the front hook (53) and the front limit member (56), so as to allow the protrusion (32) to cross over the front hook (53) when the action rod (31) is extended.

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

5. A progressive brush roller replacement mechanism according to claim 4, characterized in that: The conversion drive member is a cylinder (57), and the cylinder (57) has a telescopic rod (571) for causing the swing member (52) to swing back and forth.

6. A progressive brush roller replacement mechanism according to claim 5, characterized in that: The telescopic rod (571) and the swing member (52) are elastically connected. The telescopic rod (571) is extended and retracted to form an elastic force on the swing member (52), so that the swing member (52) switches between a rear hooking mode and a front hooking mode. When the swing member (52) is in the rear hooking mode and the protrusion (32) crosses over the rear hook (54), the rear hook (54) can be elastically reset so that the front side surface (321) of the protrusion (32) and the rear hook (54) form a hooking fit. When the swing member (52) switches to the front hooking mode and the protrusion (32) crosses over the front hook (53), the front hook (53) can be elastically reset so that the rear side surface (322) of the protrusion (32) and the front hook (53) form a hooking fit.

7. A progressive brush roller replacement mechanism according to claim 6, characterized in that: A support (511) is provided on the base (51), a shaft sleeve (59) is rotatably connected to the swing member (52), a through guide hole (593) is provided on the shaft sleeve (59), a telescopic rod (571) passes through the guide hole (593) and is slidably connected to the support (511); an elastic connection component is sleeved on the telescopic rod (571), the elastic connection component comprises a first compression spring (58) and a second compression spring (58a), a boss is provided on one side of the telescopic rod (571) close to the cylinder (57), 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. The progressive brush roller replacement mechanism according to claim 2, characterized in that: The rear hook (54) and the front hook (53) are both provided with a snap-fitting protrusion (52a), and the front side surface (321) and the rear side surface (322) of the protrusion (32) are also provided with a snap-fitting groove (32a); when the rear hook (54) or the front hook (53) cooperates with the protrusion (32), the snap-fitting protrusion (52a) and the corresponding snap-fitting groove (32a) form a snap connection.

9. The progressive brush roller replacement mechanism according to claim 1, characterized in that: The telescopic driving member (39) is a hydraulic cylinder or an electric push rod. The hydraulic cylinder or the electric push rod has a piston rod (391). The piston rod (391) is connected to the action rod (31), and the distance that the piston rod (391) extends or retracts each time is less than the total distance that the roller seat (2) slides from the initial position to the corresponding position step by step.

10. The progressive brush roller replacement mechanism according to claim 1, characterized in that: On the base (1), there are support rails (36) symmetrically arranged on both sides of the action rod (31). A laterally extending guide groove (361) is provided inside the support rail (36). The cross-sectional shape of the guide groove (361) is "匚”-shaped. The action rod (31) has a plurality of mounting sections (33) spaced apart from front to back. Rollers (34) matching the guide groove (361) are arranged on the mounting sections (33). The plurality of rollers (34) roll in the guide groove (361) and form telescopic guidance for the action rod (31).

11. A progressive brush roller replacement mechanism according to claim 10, characterized in that: Among the plurality of mounting sections (33), there is at least one adjustment section (33a). A strip-shaped groove (311) that transversely penetrates the adjustment section (33a) is provided on the adjustment section (33a). The strip-shaped groove (311) extends longitudinally. A wheel axle (35) is transversely inserted into the strip-shaped 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-shaped groove (311), thereby forming a space for the wheel axle (35) to float up and down in the strip-shaped groove (311). An adjustment assembly is provided on the adjustment section (33a). The adjustment assembly includes two adjustment members respectively abutting against the upper and lower ends of the wheel axle (35). The adjustment members in the corresponding adjustment section (33a) can move longitudinally and act on the wheel axle (35) to make the rollers (34) float longitudinally to the corresponding position to eliminate the contact gap between the rollers (34) and the top wall of the guide groove (361).

12. A progressive brush roller replacement mechanism according to claim 11, characterized in that: Support blocks (37) are connected to both sides of the adjustment section (33a). The strip-shaped groove (311) transversely penetrates the support blocks (37). Adjustment screw holes (371) communicating with the strip-shaped groove (311) are provided at both the upper and lower ends of the support blocks (37). The adjustment members are adjustment screws (38) threadedly connected in the adjustment screw holes (371) and acting on the wheel axle (35).

13. The progressive brush roller replacement mechanism according to claim 1, characterized in that: The hanging structure (5) includes a base (51) connected to the roller seat (2). A hanging pin (5a) that can elastically expand and contract longitudinally is connected to the base (51). The hanging pin (5a) has a rear hanging mode and a front hanging mode. When the hanging pin (5a) is in the rear hanging mode, the hanging pin (5a) elastically extends downward outside the base (51) and forms a hanging fit with the front side surface (321) of the corresponding convex block (32). When the hanging pin (5a) switches to the front hanging mode, the hanging pin (5a) elastically extends downward outside the base (51) and forms a hanging fit with the rear side surface (322) of the corresponding convex block (32).

14. A progressive brush roller replacement mechanism according to claim 13, characterized in that: The hanging pin (5a) can rotate along the vertical axis, and the bottom end of the hanging pin (5a) has a guiding inclined surface (5b). The guiding inclined surface (5a) can prompt the hanging pin (5a) to elastically retract upward when subjected to a force in the front and rear directions. When the hook pin (5a) is in the rear hooking mode, the guide slope (5b) faces the front side to allow the protrusion (32) to cross the hook pin (5a) when the actuating rod (31) is retracted; when the hook pin (5a) is in the rear hooking mode, the hook pin (5a) rotates along the vertical axis and makes the guide slope (5b) face the rear side to allow the protrusion (32) to cross the hook pin (5a) when the actuating rod (31) is extended.

Images