Step-by-step driving type roller changing mechanism

Abstract

The invention provides a step-by-step driving type roller changing mechanism which comprises a base and a roller seat used for bearing a brush roller, and further comprises a driving assembly arranged on the base, a hooking mechanism arranged on the roller seat and a detection module, and the detection module comprises a controller and a recognition assembly arranged on the base. The recognition assembly comprises a retraction sensor located on the rear side of the hooking column and an extension sensor located on the front side of the hooking column, a conversion mechanism enabling the positions of the retraction sensor and the extension sensor to be exchanged front and back is arranged on the base, and after the conversion mechanism adjusts the retraction sensor and the extension sensor in place, the retraction sensor and the extension sensor are recognized. On the premise that the stroke and the size of the telescopic driving piece do not need to be increased, stretching and retracting of the hooking column are controlled through the detection module, so that the multiple protruding blocks on the action rod are sequentially matched with the hooking column on the hooking mechanism, and the roller base is gradually fed into or discharged out of a polish-brush production line in multiple times; the roll changing cost is reduced, and the spatial layout of the roll changing mechanism is optimized.

Description

Technical Field

[0001] The invention relates to the field of metal surface treatment, and in particular to a step-by-step driven roller changing 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 a roller changing mechanism, and then the new rollers are sent into the grinding equipment for replacement through the roller changing mechanism.

[0003] The applicant has designed a roller changing mechanism comprising a base and a roller seat arranged on the base, the roller seat being used to receive the brush roller; a hydraulic cylinder for driving the brush roller is arranged on the base, the piston rod of the cylinder can be directly connected to the roller seat, driving the roller seat to move forward or backward, but this design structure still has shortcomings.

[0004] When the brush roller on the roller seat is transported into or out of the brush grinding equipment, a shorter roller changing operation is formed for transportation, and the roller changing mechanism can still work normally. However, when the roller seat needs to slide a longer distance, it is difficult to transport the brush roller into place due to the limited telescopic stroke of the hydraulic cylinder.

[0005] If a hydraulic cylinder with a larger 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 and occupies more space, and the corresponding cost and occupied space will also increase. Summary of the invention

[0006] In order to solve the above-mentioned technical problems, the purpose of the present invention is to provide a step-by-step driven roller changing mechanism, which controls the extension and retraction of the hanging column through the detection module without increasing the stroke and volume of the telescopic driving part, so that the multiple protrusions on the action rod are matched with the hanging column on the hanging mechanism in turn, so as to gradually send the roller seat into or out of the brush production line in multiple times; the roller changing cost is reduced and the spatial layout of the roller changing mechanism is optimized.

[0007] The technical solution of the present invention is achieved in this way: A step-by-step driven roller changing 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; and further comprises: The driving assembly is arranged on the base, and 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; the action rod is provided with a plurality of protrusions arranged at intervals in front and behind; The hook mechanism is arranged on the roller seat, and comprises a base, on which a hook assembly is arranged, and the hook assembly comprises a hook column and a power member for driving the hook column to extend and retract upward and downward; The detection module includes a controller and an identification component arranged on a base, wherein the identification component includes a retraction sensor located at the rear side of the hook column and an extension sensor located at the front side of the hook column, and the controller is electrically connected to the power member, the retraction sensor, the extension sensor, and the telescopic driving member; A conversion mechanism is arranged on the base, and the conversion mechanism can make the positions of the retracting sensor and the extending sensor interchangeable front to back; The roller-changing mechanism has an advancing state and a retracting state. When the roller-changing mechanism is in the retracting state, the action rod extends forward and drives the frontmost protrusion to move forward. When the frontmost protrusion moves to the retraction sensor position, the retraction sensor can generate a retraction signal and feed back to the controller. The controller can issue an instruction to the power member according to the retraction signal, so that the power member drives the hanging column to retract to allow the protrusion to pass; when the protrusion continues to move to the extension sensor position, the extension sensor can generate an extension signal and feed back to the controller. The controller can control the power member to drive the hanging column to extend out of the base according to the extension signal; and at the same time, control the telescopic drive member to drive the action rod to retract backward, and make the protrusion act backward on the hanging column extending out of the base to drive the roller seat to retreat backward, and then the telescopic drive member drives the action rod to extend forward again to move the next protrusion forward, and the cycle is repeated until the roller seat retreats backward to the corresponding position; When the roller changing mechanism switches to the traveling state, the conversion mechanism swaps the positions of the retraction sensor and the extension sensor. At this time, the action rod retracts and drives the protrusion at the rear end to move backward. When the protrusion at the rear end moves to the retraction sensor position, the retraction sensor can generate a retraction signal and feedback to the controller. The controller can issue an instruction to the power member according to the retraction signal, so that the power member drives the hanging column to retract to allow the protrusion to pass; when the protrusion continues to move to the extension sensor position, the extension sensor can generate and feedback the extension signal to the controller. The controller can control the power member to drive the hanging column to extend out of the base according to the extension signal, and at the same time control the telescopic drive member to drive the action rod to extend forward, and make the protrusion act forward on the hanging column extending out of the base to drive the roller seat to move forward. After that, the telescopic drive member drives the action rod to retract backward again to move the next protrusion backward, and the cycle is repeated until the roller seat moves forward to the corresponding position.

[0008] Preferably, the base includes two parallel support plates, wherein the hooking mechanism is installed on one of the support plates, and the conversion mechanism is installed on the other support plate, the conversion mechanism includes a rotating drive member arranged on the corresponding support plate, and a bracket connected to the rotating drive member, the retraction sensor is installed at the rear end of the bracket, and the extension sensor is installed at the front end of the bracket, the rotating drive member can drive the bracket to rotate half a circle along the vertical axis, so that the front and rear positions of the retraction sensor and the extension sensor are interchanged; so that the corresponding roller changing mechanism can switch between the advancing state and the retracting state.

[0009] Preferably, the rotary drive member is a rotary cylinder having a rotary rod connected to the bracket.

[0010] Preferably, a support plate on which the reversing mechanism is provided is provided with an avoidance area corresponding to the bracket, and the rotating drive member drives the bracket to rotate in the avoidance area so that the retracted sensor and the extended sensor are not exposed downward outside the base; to avoid interference between the identification component and the protrusion.

[0011] Preferably, the retraction sensor and the extension sensor are infrared sensors; infrared sensors are sensitive and low in cost, and can meet the requirements for detecting the position of the bump.

[0012] Preferably, the power member is a cylinder having a telescopic rod movable in the longitudinal direction, and the telescopic rod is connected to the hanging column.

[0013] Preferably, two limit seats spaced front and back are provided on the base, and a telescopic channel matching the hanging column is formed between the two limit seats. When the hanging column extends downward out of the base, the hanging column is in the telescopic channel, and the limit seat abuts against the hanging column, so that the hanging column responds to the force of the protrusion; the limit seat can abut against the column body of the hanging column when the hanging column is subjected to a hooking force from the front or rear side, thereby avoiding the hooking force being directly transmitted to the telescopic rod and damaging the cylinder.

[0014] Preferably, the telescopic rod is hinged on the column body of the hanging column. When the protrusion acts on the hanging column, the hanging column swings back and forth relative to the telescopic rod to prevent the force of the protrusion on the hanging column from being transmitted to the telescopic rod, further protecting the telescopic cylinder.

[0015] Preferably, the base includes two parallel support plates, wherein the hook mechanism is installed on one of the support plates, and the conversion mechanism is installed on the other support plate, and the support plate on which the conversion mechanism is installed is provided with two arc-shaped slide grooves extending forward and backward and symmetrically up and down, and the retraction sensor and the extension sensor are both connected to a sliding rod, and the two sliding rods are slidably connected in the corresponding arc-shaped slide grooves, and the retraction sensor and the extension sensor are staggered up and down, and the conversion mechanism includes a linkage rod and a reciprocating drive member connected to the middle position of the linkage rod, and the two ends of the linkage rod are respectively hinged to the two sliding rods; the reciprocating drive member can drive the linkage rod to swing forward and backward, so as to drive the two sliding rods to slide synchronously in opposite directions in the corresponding arc-shaped slide grooves, thereby interchangeably exchanging the front and rear positions of the retraction sensor and the extension sensor.

[0016] Preferably, the reciprocating drive member is a servo motor having an output shaft connected to the middle position of the linkage rod to drive the linkage rod to swing back and forth; the servo motor has high precision and good control effect.

[0017] The beneficial effects of the present invention using the above technical solution are: The roller changing mechanism in the present invention detects the position of the protrusion through the detection module, so that the protrusions on the action rod can form a hooking fit with the hanging column one by one, and then the action rod is driven to reciprocate back and forth through the telescopic driving member, so that the roller seat moves forward or retreats to the corresponding position in multiple steps, without increasing the stroke of the telescopic driving member, thereby ensuring the replacement efficiency of the brush roller and optimizing the layout space of the roller changing mechanism.

[0018] The conversion mechanism can, according to the actual needs of roller changing, make the rotating drive member drive the bracket and the retraction sensor and extension sensor on the bracket interchangeable, so that the protrusion at the front end or the rear end forms a hanging fit with the hanging column, without the need to set up a corresponding sensor on the base. The structure is simple, the cost is low, and the practicality is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the step-by-step driven roller changing mechanism sending the roller seat into the grinding and brushing production line; Figure 2 It is a schematic diagram of the projection crossing the front hook when the action rod is extended; Figure 3 It is a schematic diagram of the rear side of the protrusion being hooked to the hooking post after the hooking post extends out of the base; Figure 4 It is a schematic diagram of the action rod retracting and pulling the roller seat back; Figure 5 A schematic diagram of the action rod extending again and causing the rear side of the next lug to hook with the hook post; Figure 6 It is a schematic diagram of the action rod retracting again and pulling the secondary roller seat back; Figure 7It is a schematic diagram of the action rod extending for the third time and causing the rear side of the next lug to hook with the hook post; Figure 8 This is a schematic diagram of the action rod being retracted for the third time and pulling the roller seat back to the initial position; Fig. 9 It is a schematic diagram of the structure of the action rod and the channel steel guide rail; Fig.10 A schematic diagram of a hooking post on a hooking mechanism extending out; Fig.11 A schematic diagram of the retraction of the hitch post on the hitch mechanism; Fig.12 A schematic diagram showing the cooperation between the hooking mechanism and the detection module so that the protrusion and the hooking column are hooked; Fig.13 A schematic diagram of a conversion mechanism for interchanging the front and rear positions of a retracting sensor and an extending sensor; Fig.14 is a schematic diagram of the hanging mechanism in Example 2; The reference numerals of the figures are: 1-base, 2-roller seat, 3-drive assembly, 4-brushing production line, 5-hook mechanism, 11-first track plate, 12-second track plate, 31-action rod, 32-bump, 33-connecting seat, 34-roller, 35-axle, 36-channel steel guide rail, 39-telescopic drive member, 51-base, 52-hook column, 53-limit seat, 54-cylinder, 55-retraction sensor, 56-extension sensor, 57-retraction sensor, 58-retraction sensor, 59-retraction sensor, 60-retraction sensor, 61-retraction sensor, 62-retraction sensor, 63-retraction sensor, 64-retraction sensor, 65-retraction sensor, 66-retraction sensor, 67-retraction sensor, 68-retraction sensor, 69-retraction sensor, 70-retraction sensor, 71-retraction sensor, 72-retraction sensor, 73-retraction sensor, 74-retraction sensor, 75-retraction sensor, 76-retraction sensor, 77-retraction sensor, 78-retraction sensor, 79-retraction sensor, 80-retraction sensor, 81-retraction sensor, 82-retraction sensor, 83-retraction sensor, 84-retraction sensor, 85-retraction sensor, 86-retraction sensor, 87-retraction sensor, 88-retraction sensor, 89-retraction sensor, 90-retraction sensor, 91-retraction sensor, 92-retraction sensor, 93-retraction sensor, 94-retraction sensor, 95-retraction sensor, 96-retraction sensor, 97-retraction sensor, 98-retraction sensor, 99-retraction sensor, 100-retraction 7-cylinder, 58-bracket, 59-arc slide, 314-wheel edge, 315-guide wheel, 321-front side, 322-rear side, 361-guide groove, 391-piston rod, 511-avoidance area, 531-telescopic channel, 541-telescopic rod, 551-first detection beam, 561-second detection beam, 571-rotating rod, 591-servo motor, 592-output shaft, 593-linkage rod, 594-slide rod. DETAILED DESCRIPTION

[0020] 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.

[0021] 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.

[0022] like Figure 1-14 As shown, the present invention has multiple embodiments, and the specific implementation methods are as follows: Example 1: Figure 1-13 As shown, this embodiment provides a step-by-step driven roller changing mechanism, which is used for unloading and loading rollers in a grinding and brushing production line 4 of 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 driving assembly 3, the driving 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; a plurality of protrusions 32 arranged at intervals in front and behind are provided on the action rod 31; the roller seat 2 is provided with a hanging mechanism 5, and the protrusion 32 has a front side surface 321 and a rear side surface 322 opposite to each other in front and back; and further includes: The hook mechanism 5 is arranged on the roller seat 2, and includes a base 5, on which a hook assembly is arranged, and the hook assembly includes a hook column 52 and a power member for driving the hook column 52 to extend and retract upward and downward; The detection module includes a controller (not shown) and an identification component disposed on a base 51, wherein the identification component includes a retraction sensor 55 located at the rear side of the hook column 52 and an extension sensor 56 located at the front side of the hook column 52, and the controller is electrically connected to the power member, the retraction sensor 55, the extension sensor 56, and the telescopic driving member 39; A conversion mechanism is provided on the base 5, and the conversion mechanism can make the positions of the retracting sensor 55 and the extending sensor 56 interchangeable front and back; The roller changing mechanism has an advancing state and a retracting state. When the roller changing mechanism is in the retracting state, the action rod 31 extends forward and drives the frontmost protrusion 32 to move forward. When the frontmost protrusion 32 moves to the position of the retraction sensor 55, the retraction sensor 55 can generate a retraction signal and feed it back to the controller. The controller can issue an instruction to the power member according to the retraction signal, so that the power member drives the hanging column 52 to retract to allow the protrusion 32 to pass; when the protrusion 32 continues to move to the position of the extension sensor 56, the extension sensor 56 can generate a retraction signal. The extension signal is fed back to the controller, and the controller can control the power member to drive the hook column 52 to extend out of the base 51 according to the extension signal; and at the same time control the telescopic driving member 39 to drive the action rod 31 to retract backward, and make the rear side surface 322 of the protrusion 32 act backward on the hook column 52 extending out of the base 51, so as to drive the roller seat 2 to retreat backward, and then the telescopic driving member 39 drives the action rod 31 to extend forward again, so as to move the next protrusion 32 forward, so as to cooperate with the hook column 52 again, until the roller seat 2 retreats backward to the corresponding position; When the roller changing mechanism switches to the traveling state, the conversion mechanism swaps the positions of the retracting sensor 55 and the extending sensor 56. At this time, the action rod 31 retracts and drives the rearmost protrusion 32 to move backward. When the rearmost protrusion 32 moves to the position of the retracting sensor 55, the retracting sensor 55 can generate a retracting signal and feed it back to the controller. The controller can issue a command to the power member according to the retracting signal, so that the power member drives the hook column 52 to retract to allow the protrusion 32 to pass; when the protrusion 32 continues to move to the position of the extending sensor 56, the extending sensor 56 can generate a retracting signal. The controller generates and feeds back an extension signal to the controller, which can control the power component to drive the hanging column 52 to extend out of the base 51 according to the extension signal, and at the same time control the telescopic drive component 39 to drive the action rod 31 to extend forward, so that the front side surface 321 of the protrusion 32 acts forward on the hanging column 52 extending out of the base 51, thereby driving the roller seat 2 to move forward, and then the telescopic drive component 39 drives the action rod 31 to retract backward again, so that the next protrusion 32 moves backward, so as to cooperate with the hanging column 52 again, and this cycle is repeated until the roller seat 2 moves forward to the corresponding position.

[0023] Furthermore, the telescopic driving member 39 in the present embodiment is a hydraulic cylinder or an electric push rod, which has a piston rod 391. A connecting seat 33 is provided on the action rod 31. The piston rod 391 is connected to the action rod 31 through the connecting seat 33. In order to save the cost and space layout of the roller changing mechanism, the telescopic driving member 39 in the present embodiment is a hydraulic cylinder or an electric push rod with a small stroke. Since the multiple protrusions 32 on the action rod 31 cooperate with the hooking mechanism 5 to pull the roller seat 2, it is equivalent to dividing the sliding stroke of the entire roller seat 2 into multiple small strokes. The distance that the piston rod 391 is extended or retracted each time is much smaller than the total distance that the roller seat 2 gradually slides from the initial position to the corresponding position, thereby reducing the cost and occupied space of the telescopic driving member 39.

[0024] Further, if Fig.13 As shown, the base 51 includes two parallel support plates, one of which is equipped with the hook mechanism 5, and the other is equipped with the conversion mechanism, and the two support plates are fixed by welding a reinforcing plate; in order to quickly exchange the front and rear positions of the retracted sensor 55 and the extended sensor 56, the conversion mechanism includes a rotating drive member arranged on the corresponding support plate and a bracket 58 connected to the rotating drive member, the rotating drive member is a rotating cylinder 54, and the rotating cylinder 54 has a rotating rod 571, which is connected to the bracket 58. The retracted sensor 55 is installed at the rear end of the bracket 58, and the extended sensor 56 is installed at the front end of the bracket 58. The rotating drive member can drive the bracket 58 to rotate half a circle along the vertical axis, so that the front and rear positions of the retracted sensor 55 and the extended sensor 56 are interchanged; so that the corresponding roller changing mechanism can switch between the advancing state and the retracting state.

[0025] Furthermore, the hanging column 52 needs to extend out of the base 51 to form a hanging fit with the protrusion 32. When hanging, the distance between the protrusion 32 and the base 51 is relatively close. If the retracted sensor 55 and the extended sensor 56 are exposed outside the base 51, it is easy to cause interference expansion with the protrusion 32. Therefore, in this embodiment, a support plate of the reversing mechanism is provided with an avoidance area 511 corresponding to the bracket 58, and the rotating drive member drives the bracket 58 to rotate in the avoidance area 511, so that the retracted sensor 55 and the extended sensor 56 are not exposed downward outside the base 51; to avoid interference between the identification component and the protrusion 32, thereby reducing the maintenance cost of the identification component.

[0026] Further, if Fig.12 As shown, the retraction sensor 55 and the extension sensor 56 are infrared sensors; the infrared sensor is sensitive and low in cost, and can meet the position detection requirements of the protrusion 32. Taking the roller seat 2 in the retracted state as an example, the retraction sensor 55 will continue to emit a first detection light beam 551, and the extension sensor 56 will continue to emit a second detection light beam 561. When the front end protrusion 32 moves to the retraction sensor 55 driven by the action rod 1, the first detection light beam 551 detects the protrusion 32, and feeds back the retraction sensing signal to the controller, and the controller then retracts the hanging column 52 and allows the protrusion 32 to pass. When the protrusion 32 moves to the extension sensor 56 driven by the action rod 1, the second detection light beam 561 detects the protrusion 32, and feeds back the extension sensing signal to the controller, so that the hanging column 52 extends out of the base 51. At the same time, the controller sends a backward retraction instruction to the telescopic drive member 39 to pull the roller seat 2 backward to complete a retraction drive process of a stroke.

[0027] Further, if Figure 10-11 As shown, in order to ensure that the hanging column 52 can be extended and retracted quickly and stably, the power part is a cylinder 54, and the cylinder 54 has a telescopic rod 541 that can move in the longitudinal direction, and the telescopic rod 541 is connected to the hanging column 52; considering that when the hanging is matched, the front side 321 or the rear side 322 of the protrusion 32 will form a large force on the hanging column 52, two limit seats 53 spaced front and back are provided on the base 51, and a telescopic channel 531 matching the hanging column 52 is formed between the two limit seats 53. When the hanging column 52 extends downward out of the base 51, the hanging column 52 is in the telescopic channel 531, and the limit seat 53 abuts against the hanging column 52, so that the hanging column 52 responds to the force of the protrusion 32; the limit seat 53 can abut against the column body of the hanging column 52 when the hanging column 52 is subjected to the hooking force from the front or rear side, so as to avoid directly transmitting the hooking force to the telescopic rod 541 and damaging the cylinder 54.

[0028] Furthermore, the width of the telescopic channel 531 matches that of the hanging column 52. However, due to errors in the actual state, there will still be a certain gap between the hanging column 52 and the limit seat 53 after the hanging column 52 enters the telescopic channel 531. When the bump 32 acts on the hanging column 52, although the limit seat 53 will resist the hanging column 52, due to the existence of the gap, a part of the tiny acting force will still be transmitted to the telescopic rod 541, which is likely to cause the telescopic rod 541 to bend. Therefore, in this embodiment, the telescopic rod 541 is hinged on the column body of the hanging column 52. When the bump 32 acts on the hanging column 52, the hanging column 52 swings slightly back and forth relative to the telescopic rod 541 to prevent the acting force of the bump 32 on the hanging column 52 from being transmitted to the telescopic rod 541, thus further protecting the telescopic cylinder 54.

[0029] Furthermore, as Fig. 9 shown, in this embodiment, channel steel guide rails 36 are provided on the base 1 and symmetrically arranged on both sides of the action rod 31. A horizontally extending guide groove 361 is formed inside the channel steel guide rail 36, and the cross-sectional shape of the guide groove 361 is "匚"-shaped; rollers 34 matching the guide groove 361 are arranged on both sides of the action rod 31; 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. The design of this guiding and supporting structure is simple, with low cost and is convenient for large-scale application.

[0030] Furthermore, in order to prevent the action rod 31 from shifting horizontally during telescoping and make its telescoping process smoother, an anti-horizontal shift structure is provided on the channel steel guide rail 36 and some of the rollers 34. For example, guide wheels 315 that can rotate along the vertical axis are arranged in each guide groove 361, and the outer peripheral surfaces of the two guide wheels 315 respectively abut against the left and right sides of the action rod 31 to form further telescopic guidance for the action rod 31; in one group of rollers 34 on both sides of the action rod 31, a wheel edge 314 protruding from the outer peripheral edge of the roller 34 is provided on the inner side of each roller 34, and the wheel edge 314 abuts against the inner side of the corresponding channel steel guide rail 36 to prevent the action rod 31 from shifting horizontally during telescoping.

[0031] Embodiment 2: As Fig.14As shown, the difference between this embodiment and the above-mentioned embodiment lies in that the structure of the conversion mechanism is different. Specifically, two arc-shaped slide grooves 59 extending forward and backward and symmetrically up and down are opened on the support plate for installing the conversion mechanism. A slide bar 594 is connected to each of the retraction sensor 55 and the extension sensor 56. The two slide bars 594 are slidably connected in the corresponding arc-shaped slide grooves 59, and the retraction sensor 55 and the extension sensor 56 are staggered up and down. The conversion mechanism includes a linkage rod 593 and a reciprocating driving member connected to the middle position of the linkage rod 593. The two ends of the linkage rod 593 are respectively hinged to the two slide bars 594; the reciprocating driving member can drive the linkage rod 593 to swing forward and backward, so as to drive the two slide bars 594 to slide synchronously in opposite directions in the corresponding arc-shaped slide grooves 59, thereby exchanging the front and rear positions of the retraction sensor 55 and the extension sensor 56, so as to switch the corresponding roller changing mechanism between the advancing state and the retracting state, thereby achieving the same effect as in the above-mentioned embodiment.

[0032] Furthermore, the reciprocating drive member is a servo motor, which has an output shaft 592, and the output shaft 592 is connected to the middle position of the linkage rod 593 to drive the linkage rod 593 to swing back and forth; the servo motor has high precision and good control effect.

[0033] 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 step-by-step driven roller changing mechanism, comprising 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 own length direction; characterized in that: Also includes: A driving assembly (3) is arranged on the base (1), comprising an operating rod (31) and a telescopic driving member (39); the telescopic driving member (39) is connected to the operating rod (31) and can drive the operating rod (31) to extend forward or retract backward by its own telescopic movement; the operating rod (31) is provided with a plurality of protrusions (32) spaced apart from each other in front and rear; The hook mechanism (5) is arranged on the roller seat (2), and comprises a base (5). The base (5) is provided with a hook assembly, and the hook assembly comprises a hook column (52) and a power member for driving the hook column (52) to extend and retract upward and downward; The detection module comprises a controller and an identification component disposed on a base (51), the identification component comprising a retraction sensor (55) located at the rear side of the hanging column (52) and an extension sensor (56) located at the front side of the hanging column (52), the controller being electrically connected to the power member, the retraction sensor (55), the extension sensor (56), and the telescopic driving member (39); A conversion mechanism is arranged on the base (5), and the conversion mechanism can make the positions of the retracting sensor (55) and the extending sensor (56) interchangeable front and back; The roller changing mechanism has an advancing state and a retracting state. When the roller changing mechanism is in the retracting state, the action rod (31) extends forward and drives the frontmost protrusion (32) to move forward. When the frontmost protrusion (32) moves to the position of the retraction sensor (55), the retraction sensor (55) can generate a retraction signal and feed it back to the controller. The controller can send a command to the power member according to the retraction signal, so that the power member drives the hanging column (52) to retract, so as to allow the protrusion (32) to pass through. When the protrusion (32) continues to move to the position of the extension sensor (56), the extension sensor (56) 56) can generate an extension signal and feed it back to the controller. The controller can control the power member to drive the connecting column (52) to extend out of the base (51) according to the extension signal; and at the same time control the telescopic driving member (39) to drive the action rod (31) to retract backward, and make the protrusion (32) act backward on the connecting column (52) extending out of the base (51), so as to drive the roller seat (2) to retreat backward, and then the telescopic driving member (39) drives the action rod (31) to extend forward again, so as to make the next protrusion (32) move forward, and the cycle is repeated until the roller seat (2) retreats backward to the corresponding position; When the roller changing mechanism switches to the traveling state, the conversion mechanism causes the positions of the retracting sensor (55) and the extending sensor (56) to be interchanged. At this time, the action rod (31) retracts and drives the rearmost protrusion (32) to move backward. When the rearmost protrusion (32) moves to the position of the retracting sensor (55), the retracting sensor (55) can generate a retracting signal and feed it back to the controller. The controller can send a command to the power member according to the retracting signal, so that the power member drives the hook column (52) to retract to allow the protrusion (32) to pass. When the protrusion (32) continues to move to the position of the extending sensor (56), The extension sensor (56) can generate and feed back an extension signal to the controller. The controller can control the power member to drive the connecting column (52) to extend out of the base (51) according to the extension signal, and at the same time control the telescopic driving member (39) to drive the action rod (31) to extend forward, and make the protrusion (32) act forward on the connecting column (52) extending out of the base (51), so as to drive the roller seat (2) to move forward, and then the telescopic driving member (39) drives the action rod (31) to retract backward again, so as to make the next protrusion (32) move backward, and the cycle is repeated until the roller seat (2) moves forward to the corresponding position.

2. The step-by-step driven roller changing mechanism according to claim 1, characterized in that: The base (51) comprises two parallel support plates, wherein the hook mechanism (5) is mounted on one of the support plates, and the conversion mechanism is mounted on the other support plate. The conversion mechanism comprises a rotary drive member arranged on the corresponding support plate, and a bracket (58) connected to the rotary drive member. The retraction sensor (55) is mounted on the rear end of the bracket (58), and the extension sensor (56) is mounted on the front end of the bracket (58). The rotary drive member can drive the bracket (58) to rotate half a circle along the vertical axis, so that the front and rear positions of the retraction sensor (55) and the extension sensor (56) are interchanged.

3. The step-by-step driven roller changing mechanism according to claim 2 is characterized in that: The rotary driving member is a rotary cylinder (57). The rotary cylinder (57) has a rotary rod (571). The rotary rod (571) is connected to the bracket (58).

4. The step-by-step drive roller changing mechanism according to claim 2 is characterized in that: A support plate on which the reversing mechanism is provided is provided with an avoidance area (511) corresponding to the bracket (58), and the rotary drive member drives the bracket (58) to rotate in the avoidance area (511) so that the retracted sensor (55) and the extended sensor (56) do not protrude downward from the base (51).

5. The step-by-step driven roller changing mechanism according to claim 1 is characterized in that: The retracting sensor (55) and the extending sensor (56) are infrared sensors.

6. The step-by-step driven roller changing mechanism according to claim 1, characterized in that: The power member is a cylinder (54), and the cylinder (54) has a telescopic rod (541) movable in the longitudinal direction, and the telescopic rod (541) is connected to the hanging column (52).

7. The step-by-step driven roller changing mechanism according to claim 6, characterized in that: The base (51) is provided with two limit seats (53) spaced apart from each other in front and back, and a telescopic channel (531) matching the hanging column (52) is formed between the two limit seats (53). When the hanging column (52) extends downward out of the base (51), the hanging column (52) is located in the telescopic channel (531), and the limit seats (53) abut against the hanging column (52), so that the hanging column (52) responds to the action of the protrusion (32).

8. The step-by-step driven roller changing mechanism according to claim 7, characterized in that: The telescopic rod (541) is hinged on the column body of the hanging column (52). When the protrusion (32) acts on the hanging column (52), the hanging column (52) swings back and forth relative to the telescopic rod (541) to prevent the force of the protrusion (32) on the hanging column (52) from being transmitted to the telescopic rod (541).

9. The step-by-step driven roller changing mechanism according to claim 1, characterized in that: The base (51) comprises two parallel support plates, wherein the hook mechanism (5) is mounted on one support plate, and the conversion mechanism is mounted on the other support plate. The support plate on which the conversion mechanism is mounted is provided with two arc-shaped slide grooves (59) extending forward and backward and symmetrically arranged up and down. The retracting sensor (55) and the extending sensor (56) are both connected with a slide bar (594). The two slide bars (594) are slidably connected in the corresponding arc-shaped slide grooves (59), and the retracting sensor (55) and the extending sensor (56) are staggered up and down. The conversion mechanism comprises a linkage rod (593) and a reciprocating driving member connected to the middle position of the linkage rod (593). The two ends of the linkage rod (593) are respectively hinged to the two slide bars (594). The reciprocating driving member can drive the linkage rod (593) to swing forward and backward, so as to drive the two slide bars (594) to slide synchronously in opposite directions in the corresponding arc-shaped slide grooves (59), thereby exchanging the front and rear positions of the retracting sensor (55) and the extending sensor (56).

10. The step-by-step driven roller changing mechanism according to claim 9, characterized in that: The reciprocating driving member is a servo motor, which has an output shaft (592). The output shaft (592) is connected to the middle position of the linkage rod (593) to drive the linkage rod (593) to swing back and forth.

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