CN217048074U

CN217048074U - Variable-pitch blackboard cleaning device

Info

Publication number: CN217048074U
Application number: CN202220472225.7U
Authority: CN
Inventors: 杨峰; 柳阳; 蔡智瞿; 李慧晨; 金恺越; 齐菲
Original assignee: Shanghai University of Electric Power
Current assignee: Shanghai University of Electric Power
Priority date: 2022-03-07
Filing date: 2022-03-07
Publication date: 2022-07-26
Anticipated expiration: 2032-03-07

Abstract

The utility model discloses a variable-pitch blackboard cleaning device, wherein a transmission mechanism comprises a fixed frame, a transmission platform and a limiting sliding table which are arranged on the fixed frame in a matching way, a variable-pitch component arranged on the transmission platform and a driving component for driving the transmission platform to move; the cleaning mechanism is arranged on the transmission mechanism in a matching mode and comprises a roller shaft arranged on the limiting sliding table, and a cleaning roller and a driven gear which are sleeved on the roller shaft, wherein the roller surface of the cleaning roller is in rolling contact with the board surface of the blackboard; the utility model is arranged on the existing blackboard through the mounting bracket, the distance between the mounting bracket and the existing blackboard is adjustable, and the mounting bracket can adapt to different blackboard forms; the cleaning roller can automatically change the distance between the cleaning roller and the blackboard and is compatible with various push-pull type blackboards; secondly, all power of the device is provided by one motor, and the device has the characteristics of low cost and convenience in maintenance; in addition, the cleaning roller is installed on the limiting sliding table through the detachable connecting buckle and the elastic piece, can be detached without tools, and has the characteristic of convenient maintenance.

Description

Variable-pitch blackboard cleaning device

Technical Field

The utility model relates to a clean technical field of blackboard especially relates to a displacement blackboard cleaning device.

Background

At present, common automatic blackboard cleaning devices mainly comprise a two-shaft sliding table shape, a bicycle type and the like. The existing solutions all have respective technical defects: (1) the two-axis sliding table type adopts a small traditional blackboard eraser and a sliding table, has poor adaptability, adopts the design of integrating with a blackboard and cannot be installed on the existing blackboard; the compatibility is poor, and the blackboard cannot be suitable for push-pull type blackboards; the cleaning efficiency is low, and the time consumption is long when the whole blackboard is cleaned; two sets of motor systems are needed, so that the reliability is poor; the cleaning device cannot be detached quickly, and the maintenance cost is high. (2) The self-propelled trolley type magnetically attracts the trolley to crawl on a blackboard, needs to be charged and cannot meet the high-strength requirement; the reliability is poor.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the abstract and the title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the present application, and such simplifications or omissions cannot be used to limit the scope of the present invention.

The utility model discloses a problem that the blackboard cleaning device exists has been provided in view of above-mentioned.

Therefore, the utility model aims at providing a displacement blackboard cleaning device, it is used for solving current blackboard cleaning device suitability poor, and the compatibility is poor, clean inefficiency and the poor problem of reliability.

In order to solve the technical problem, the utility model provides a following technical scheme: a variable-pitch blackboard cleaning device comprises a mounting bracket, a transmission mechanism and a cleaning mechanism, wherein the transmission mechanism comprises a fixed frame, a transmission platform and a limiting sliding platform which are arranged on the fixed frame in a matching way, a variable-pitch assembly arranged on the transmission platform and a driving assembly for driving the transmission platform to move; and the cleaning mechanism is arranged on the transmission mechanism in a matching manner and comprises a roller shaft arranged on the limiting sliding table, a cleaning roller and a driven gear, wherein the cleaning roller and the driven gear are arranged on the roller shaft in a sleeved manner, and the roller surface of the cleaning roller is in rolling contact with the board surface of the blackboard.

As a preferred scheme of displacement blackboard cleaning device, wherein: the fixed frame comprises a frame body and a limiting slide rail which is fixed between the long side walls of the frame body and is parallel to the short side of the frame body and the optical axis slide rail; the limiting sliding table is arranged on the short side wall of the frame body.

As a preferred scheme of displacement blackboard cleaning device, wherein: the transmission table comprises a table frame, a second sliding block arranged on the side wall of the upper end of the table frame and a rotating wheel set rotatably arranged in the middle of the table frame; the second sliding block is sleeved on the limiting sliding rail in a sliding mode.

As a preferred scheme of displacement blackboard cleaning device, wherein: the variable pitch assembly comprises a variable pitch batten fixedly arranged above the rack, a variable pitch arc groove formed in the variable pitch batten and a rotating gear rotationally arranged on the surface of the variable pitch batten; the rotating gear is coaxially connected with a driving gear in the rotating wheel set.

As a preferred scheme of displacement blackboard cleaning device, wherein: the limiting sliding table comprises a sliding table limiting rod vertically arranged on the side wall of the short edge of the frame body, a limiting sliding plate slidably sleeved on the sliding table limiting rod, connecting buckles arranged at two ends of the limiting sliding plate and elastic pieces arranged between the connecting buckles and the side wall of the short edge; the side wall of the limiting sliding plate is provided with a through hole.

As a preferred scheme of displacement blackboard cleaning device, wherein: the driving assembly comprises a driving motor, a driving wheel arranged on an output shaft of the driving motor and a synchronous belt arranged between the driving wheel and the driven wheel; the synchronous belt penetrates through the rotating wheel set and the fixed clamping plate, is respectively in rotating contact with the driving gear and the synchronous rotating wheel in the rotating wheel set, and is fixedly connected with the fixed clamping plate.

As a preferred scheme of displacement blackboard cleaning device, wherein: the mounting bracket comprises floating mounting plates mounted on the outer frame of the blackboard and an optical axis slide rail arranged between the floating mounting plates; the floating mounting plate comprises a first mounting plate and a second mounting plate which are arranged in pair, the first mounting plate and the second mounting plate are respectively arranged on the upper end side wall and the lower end side wall of the blackboard outer frame, and the optical axis slide rail is provided with a first slide rail and a second slide rail; be fixed with first slide rail between the first mounting panel, be fixed with the second slide rail between the second mounting panel.

As a preferred scheme of displacement blackboard cleaning device, wherein: the driving motor is arranged on one side wall of the second mounting plate, and the driven wheel is arranged on the side wall of the second mounting plate on the opposite side; the end parts of the long edges of the frame body are respectively provided with a first sliding block, and the first sliding blocks are respectively sleeved on the first sliding rail and the second sliding rail in a sliding manner; the rack is arranged on the second sliding rail in a sliding manner through a third sliding block arranged on the side wall of the lower end of the rack.

As a preferred scheme of displacement blackboard cleaning device, wherein: two ends of the roll shaft are matched and rotated in the through hole, and one end of the roll shaft extends and slides in the variable pitch arc groove; the driven gear is connected with the rotating gear through a second synchronous belt, and the rotating gear is located at the radial circle center of the variable pitch arc groove.

As a preferred scheme of displacement blackboard cleaning device, wherein: the axial length of the cleaning roller is smaller than the distance between the two short sides of the frame body, and the cleaning roller is matched with the width of the blackboard.

The utility model has the advantages that:

the utility model is arranged on the prior blackboard through the mounting bracket, the distance between the mounting bracket and the prior blackboard is adjustable, and the mounting bracket can be adapted to different blackboard forms; the cleaning range can cover the whole blackboard, the cleaning roller can complete the cleaning of the blackboard once reciprocating, and the blackboard cleaning device has the characteristic of high efficiency; the distance between the cleaning roller and the blackboard can be automatically changed, and the cleaning roller is compatible with various push-pull type blackboards; and secondly, all power of the device is provided by one motor, and the device has the characteristics of low cost and convenience in maintenance. In addition, the cleaning roller is installed on the limiting sliding table through the detachable connecting buckle and the elastic piece, can be detached without tools, and has the characteristic of convenient maintenance.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:

figure 1 is the utility model discloses displacement blackboard cleaning device's overall connection scene sketch map.

Fig. 2 is the schematic view of the separation structure of the variable-pitch blackboard cleaning device and the blackboard.

Fig. 3 is a concrete structure schematic diagram of the variable pitch blackboard cleaning device of the present invention.

Fig. 4 is the schematic structural diagram of the transmission mechanism and the cleaning mechanism of the variable-pitch blackboard cleaning device of the present invention.

Fig. 5 is a schematic view of the separating structure of the transmission mechanism of the variable-pitch blackboard cleaning device of the present invention.

Fig. 6 is the utility model discloses displacement blackboard cleaning device's fixed frame and spacing slip table connection structure sketch map.

Fig. 7 is a structural schematic diagram of the back surface of the transmission mechanism of the variable pitch blackboard cleaning device of the present invention.

Fig. 8 is a schematic view of the connection structure between the transmission table and the variable pitch assembly of the variable pitch blackboard cleaning device of the present invention.

Fig. 9 is a schematic view of the connection structure between the driving assembly and the transmission platform of the variable pitch blackboard cleaning device of the present invention.

Fig. 10 is a schematic view of the action state of the pitch-variable assembly of the cleaning device for the variable-pitch blackboard of the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, other ways of implementing the invention may be devised different from those described herein, and it will be apparent to those skilled in the art that the invention can be practiced without departing from the spirit and scope of the invention.

Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Furthermore, the present invention is described in detail with reference to the schematic drawings, and in the detailed description of the embodiments of the present invention, for convenience of illustration, the sectional view showing the device structure may not be partially enlarged according to the general scale, and the schematic drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Example 1

Referring to fig. 1 to 5, for the first embodiment of the present invention, a variable-pitch blackboard cleaning device is provided, which includes a mounting bracket 100, a transmission mechanism 200 and a cleaning mechanism 300, wherein the mounting bracket 100 is integrally mounted on the outer frame of the blackboard, and is used for fixing the mounting of the transmission mechanism 200 and the cleaning mechanism 300, the cleaning mechanism 300 is used for cleaning the writing board surface of the blackboard, and the transmission mechanism 200 is used for driving the cleaning mechanism 300 to move.

Specifically, the mounting bracket 100 includes floating mounting plates 101 mounted on the outer frame of the blackboard H and optical axis slide rails 102 disposed between the floating mounting plates 101; since the writing board surface of the blackboard H is a plane, an outer bracket for mounting needs to be set up on the outer side of the writing board surface, that is, two sets of floating mounting boards 101 are used, and the floating mounting boards 101 adjacent to each other in the horizontal direction are connected by optical axis slide rails 102.

The transmission mechanism 200 is arranged on the mounting bracket 100 in a matching manner, and comprises a fixed frame 201 arranged on the optical axis slide rail 102, a transmission table 202 and a limiting sliding table 203 which are arranged on the fixed frame 201, a variable pitch assembly 204 arranged on the transmission table 202, and a driving assembly 205 for driving the transmission table 202 to move; the transmission mechanism 200 is integrally and movably mounted on the mounting bracket 100, specifically, the upper end and the lower end of the fixed frame 201 are sleeved and slid on the optical axis slide rail 102, and other components such as the transmission table 202, the limiting slide table 203, the variable pitch assembly 204 and the driving assembly 205 are mounted and distributed on the fixed frame 201; further, the transmission table 202 receives the power output by the driving assembly 205 and pushes the fixing frame 201 to slide on the optical axis slide rail 102, and the transmission table 202 can drive the roller shaft 301 and the cleaning roller 302 of the cleaning mechanism 300 to rotate at the same time. The limit sliding table 203 and the pitch varying assembly 204 are used for installing and limiting the cleaning mechanism 300, and the cleaning roller 302 can always be in normal rolling contact with the board surface of the blackboard H.

The cleaning mechanism 300 is arranged in the transmission mechanism 200 in a matching manner, and comprises a roller shaft 301 arranged on the limiting sliding table 203, and a cleaning roller 302 and a driven gear 303 which are sleeved on the roller shaft 301, wherein the roller surface of the cleaning roller 302 is in rolling contact with the board surface of the blackboard H. The cleaning roller 302 is sleeved on the roller shaft 301 and is indirectly driven by the transmission table 202, and the cleaning roller 302 can clean the blackboard surface of the blackboard H in the process of being in pressing contact with the blackboard surface; the driven gear 303 is mounted on an end of the roller shaft 301, receives power output from the drive table 202, and drives the cleaning roller 302 to rotate.

Example 2

Referring to fig. 1 to 3, a second embodiment of the present invention is different from the first embodiment in that: the floating mounting plate 101 comprises a first mounting plate 101a and a second mounting plate 101b which are arranged in pair, the first mounting plate 101a and the second mounting plate 101b are respectively arranged on the upper end side wall and the lower end side wall of the blackboard H outer frame, and the optical axis slide rail 102 is provided with a first slide rail 102a and a second slide rail 102 b; first slide rails 102a are fixed between the first mounting plates 101a, and second slide rails 102b are fixed between the second mounting plates 101 b.

Compared with the embodiment 1, the floating mounting plates 101 are further divided into two groups, a clamping plate structure or a bolt fixed connection structure in the existing market can be adopted, the first mounting plate 101a and the second mounting plate 101b are horizontally mounted in pairs, and the distance between the two groups of mounting plates is larger than the width of the blackboard H, so that the cleaning effect of the cleaning roller 302 is facilitated; the first slide rail 102a and the second slide rail 102b are respectively corresponding between the first mounting plates 101a and the second mounting plates 101b, wherein the slide rail length of the first slide rail 102a and the second slide rail 102b is equal to the plate length of the blackboard H.

The rest of the structure is the same as that of embodiment 1.

Example 3

Referring to fig. 3 to 10, a third embodiment of the present invention is different from the second embodiment in that: the fixing frame 201 comprises a frame body 201a, a first sliding block 201b arranged at the end part of the long side L of the frame body 201a, and a limit slide rail 201b which is fixed between the side walls of the long side L and is parallel to the short side W of the frame body 201a and the optical axis slide rail 102; the limit sliding table 203 is arranged on the side wall of the short side W of the frame body 201 a; the first sliding blocks 201b at the two ends of the long side L are respectively slidably sleeved on the first slide rail 102a and the second slide rail 102 b.

The transmission table 202 comprises a table frame 202a, a second sliding block 202b which is arranged at the lower end of the table frame 202a and is sleeved on the second sliding rail 102b in a sliding manner, a rotating wheel set 202c which is rotatably arranged at the middle part of the table frame 202a, and a third sliding block 202e which is arranged on the side wall of the upper end of the table frame 202 a; the third sliding block 202e is slidably sleeved on the limiting sliding rail 201 b.

The pitch-variable assembly 204 comprises a pitch-variable slat 204a fixedly arranged above the rack 202a, a pitch-variable arc groove 204b opened on the pitch-variable slat 204a, and a rotating gear 204c rotatably arranged on the surface of the pitch-variable slat 204 a; the rotary gear 204c is coaxially connected to the drive gear 202c-1 of the rotary gear set 202 c.

The limiting sliding table 203 comprises a sliding table limiting rod 203a vertically arranged on the short side W side wall of the frame body 201a, a limiting sliding plate 203b slidingly sleeved on the sliding table limiting rod 203a, connecting buckles 203c arranged at two ends of the limiting sliding plate 203b, and elastic pieces 203d arranged on the connecting buckles 203c and the short side W side wall; the side wall of the limit sliding plate 203b is provided with a through hole 203 b-1.

The driving assembly 205 comprises a driving motor 205a mounted on the side wall of the second mounting plate 101b on one side, a driving wheel 205b arranged on the output shaft of the driving motor 205a, a driven wheel 205c arranged on the mounting plate 101b on the other side, and a timing belt 205d rotatably arranged between the driving wheel 205b and the driven wheel 205 c; the synchronous belt 205d passes through the rotating wheel set 202c and the fixed clamp plate 202d, is respectively in rotating contact with the driving gear 202c-1 and the synchronous rotating wheel 202c-2 in the rotating wheel set 202c, and is fixedly connected with the fixed clamp plate 202 d.

Compared with embodiment 2, the fixed frame 201 has a rectangular frame structure, the end portions of the long sides L of the frame 201a slide on the optical axis slide rails 102 via the first sliders 201b, the side walls of the short sides W are provided with the limit slide tables 203, and the limit slide tables 203 are arranged perpendicular to the plate surfaces of the blackboard H. The limiting slide rails 201b are distributed between the side walls of the two long sides L and are parallel to the short sides L.

The rack 202a is a block structure with a hollow interior, the second slider 202b and the third slider 202e are respectively positioned on the side walls of the bottom and the top of the rack 202a and are positioned on one side of the rack 202a close to the limiting slide rail 201b, and the rack 202a can slide through the upper and lower limiting ends to keep the whole stability; furthermore, the rotating wheel set 202c is installed in the middle frame body of the platform 202a, and the rotating wheel set 202c further includes two synchronous rotating wheels 202c-2 respectively located at two sides of the driving gear 202c-1, and keeping synchronous rotation with the driving gear 202c-1, and used for keeping stable connection of the synchronous belt 205d and the driving gear 202 c-1. The fixed clamp plate 202d maintains the same mounting surface as the pulley group 202c for clamping the timing belt 205d so that the entire drive stage 202 moves along with the timing belt 205 d.

Further, the pitch-variable assembly 201 is integrally mounted on the top of the platform 202a, and has a main body of a pitch-variable slat 204a having a pitch-variable arc groove 204b on a plate surface, and a rotary gear 204c on the plate surface rotates in synchronization with a drive shaft extending from the drive gear 202 c-1. It should be noted that the arc groove 204b of the variable pitch arc groove 204b is a regular circle or a semicircle, and the rotating gear 204c rotates at the center of the arc groove.

Further, the two sets of the limit sliding tables 203 are respectively mounted on the side walls of the short sides W on the upper and lower sides of the frame 201a, and the structure of one set is described in detail because the two sets have the same structure. The sliding table limiting rod 203a is vertically fixed on the side wall of the short side W, and preferably has a distribution mode with two symmetrical ends, so that the limiting sliding plate 203b sleeved on the sliding table limiting rod 203a can stably slide. Further, the connecting buckle 203c is used for installing the elastic member 203d, the elastic member 203d is preferably a spring, one end of the elastic member is detachably connected with the side wall of the short side W, the other end of the elastic member is detachably connected with the side wall of the limit sliding plate 203b through the connecting buckle 203c, the elastic member 203d is used for pulling the limit sliding plate 203d to the short side W, when the cleaning roller 302 is installed between the two sets of limit sliding tables 203, the edge of the cleaning roller 302 can be kept in stable contact with the board surface of the blackboard H all the time due to the existence of the roller diameter of the cleaning roller 302, and therefore the cleaning effect when the cleaning roller 302 rotates is achieved. The position of a through hole 203b-1 formed in the side wall of the limit sliding plate 203b is determined according to the installation position of the cleaning roller 302, and the through hole is used for placing the roller shaft 301 provided with the cleaning roller 302.

Further, the driving component 205 is a driving part of the whole apparatus, wherein the driving motor 205a provides a driving force, and wherein the driving motor 205a can realize forward rotation and reverse rotation. The driving wheel 205b, the driven wheel 205c and the timing belt 205d form a complete driving chain, and the driving wheel 205b is connected with the output shaft of the driving motor 205a, so that the driving motor 205a drives the driving chain to move integrally. The driving assembly 205 is integrally mounted on the pair of second mounting plates 101b, the timing belt 205d is annular, one side of the timing belt 205d is clamped in the fixed clamping plate 202d, and the other opposite side of the timing belt passes through the rotating wheel set 202c to drive the driving gear 202c-1 to rotate to transmit power.

The rest of the structure is the same as that of embodiment 2.

Example 4

Referring to fig. 2 to 4, a fourth embodiment of the present invention is different from the third embodiment in that: both ends of the roller shaft 301 are engaged and rotated in the through hole 203b-1, and one end thereof extends and slides in the pitch arc groove 204 b.

The axial length of the cleaning roller 302 is smaller than the distance between the two short sides W of the frame 201a and matches the width of the blackboard H.

The driven gear 303 is connected with the rotating gear 204c through a second timing belt D, and the rotating gear 204c is located at the radial center of the variable pitch arc groove 204 b.

Compared with embodiment 3, further, the roller shaft 301 penetrates through the axis of the cleaning roller 302 and is fixed into a whole, the roller shaft 301 is installed between the two sets of limit sliding tables 203, the end part of the roller shaft 301 is rotatably inserted into the through hole 203b-1, the end part located on the lower side of the roller shaft 301 is provided with the driven gear 303, the driven gear 303 and the rotating gear 204c are located in the same horizontal plane and are kept synchronously connected through the second synchronous belt D, and the rotating gear 204c drives the driven gear 303 to rotate, namely, the cleaning roller 302 to rotate.

The axial length of the cleaning roller 302 is matched with the width of the blackboard H, namely the length of the cleaning roller 302 is close to the width of the blackboard H, so as to realize the best cleaning effect.

The rest of the structure is the same as that of example 3.

Referring to fig. 1 to 10, in an initial state of the device, a driving mechanism 200 provided with a cleaning mechanism 300 is parked at one side of the board surface of a blackboard H, so that the writing area occupied by the blackboard H is reduced; at the moment, the cleaning roller 302 is arranged between the two groups of limiting sliding tables 203 through the roller shaft 301, and under the action of the elastic piece 203d, the edge of the cleaning roller 302 is tightly attached to the board surface of the blackboard H; and the end of the roller shaft 301 slides in the pitch arc groove 204b and on the side close to the blackboard H.

When the writing area of the blackboard H needs to be wiped, the driving motor 205a is started to operate, and the synchronous belt 205d is fixedly connected with the fixed clamp plate 202d of the transmission table 202, so that the table 202a is pulled to move along the second slide rail 102b and the limit slide rail 201b in a single direction through the synchronous belt 205d, and when the table 202a moves to the end of the limit slide rail 201b, the fixed frame 201 is pushed to move along the optical axis slide rail 102 as a whole, that is, the cleaning mechanism 300 is driven to move as a whole. In the moving process, as the belt body of the synchronous belt 205D is also connected with the driving gear 202c-1, the driving gear 202c-1 is driven to rotate, and the rotating gear 204c is coaxial with the driving gear 202c-1, so that the rotating gear 204c also rotates, and under the synchronous action of the second synchronous belt D, the driven gear 303 is driven to rotate, and the synchronous cleaning roller 302 rotates to clean the board surface of the blackboard H.

In the overlapped area of the two blackboards H, the thickness difference exists between the two blackboards, the cleaning roller 302 needs to be transited from the back layer to the front layer (or from the front layer to the back layer), in the transition process, the edge of the cleaning roller 302 rolls to the edge of the front layer, the distance between the cleaning roller 302 and the blackboard H is reduced due to the unchanged roller diameter of the cleaning roller 302, the pressure between the cleaning roller and the blackboard H is increased, so that the end part of the roller shaft 301 slides in the variable-pitch arc groove 204b and gradually moves to one side far away from the blackboard H, and in the process, the transmission table 202 generates transient braking in the direction opposite to the transmission direction of the synchronous belt 205 d; when the roller 302 to be cleaned climbs the surface of the previous blackboard layer, the transmission table 202 will normally push the fixing frame 201 to move along the optical axis slide rail 102. The elastic member 203d is stretched again, and the surface of the cleaning roller 302 is still closely attached to the surface of the blackboard H, thereby realizing continuous cleaning. When the cleaning roller 302 reversely returns to the initial position, namely, the blackboard is transited from the previous layer to the next layer, the action process is opposite to the previous process; and will not be repeated.

It should be further noted that the cleaning mechanism 300 is easy to assemble and disassemble as a whole, and the assembling process is as follows: the cleaning roller 302 and the roller shaft 301 are assembled into a whole, so that two ends of the roller shaft 301 are inserted into the through holes 203b-1 of the two groups of limiting sliding plates 203b, the driven gear 303 is installed at the lower end part of the roller shaft 301 and inserted into the variable pitch arc groove 204b, and the driven gear 303 is connected with the rotating gear 204c through a second synchronous belt D; and then the connecting buckle 203c is pulled, and the free end of the elastic piece 203d is connected to the limiting sliding plate 203b, so that stable connection can be realized, and the tensioning contact state between the cleaning roller 302 and the blackboard H is also kept. When the cleaning mechanism 300 is detached, the connecting buckle 203c is detached, and the elastic piece 203d is released, so that the cleaning mechanism 300 can be easily detached. The maintenance process of the whole installation or disassembly is simple, and the blackboard H with different widths can be suitable by replacing the cleaning roller 302.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a variable distance blackboard cleaning device which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the transmission mechanism (200) comprises a fixed frame (201), a transmission table (202) and a limiting sliding table (203) which are arranged on the fixed frame (201) in a matching manner, a variable-pitch assembly (204) arranged on the transmission table (202), and a driving assembly (205) for driving the transmission table (202) to move; and (c) a second step of,

clean mechanism (300), the cooperation set up in on drive mechanism (200), it is including install in roller (301) on spacing slip table (203) are located with the cover cleaning roller (302) and driven gear (303) on roller (301), the face rolling contact of the roll surface of cleaning roller (302) and blackboard (H).

2. The variable pitch blackboard cleaning device of claim 1, characterized in that: the fixed frame (201) comprises a frame body (201a) and a limiting slide rail (201b) which is fixed between the side walls of the long side (L) of the frame body (201a) and is parallel to the short side (W) of the frame body (201a) and the optical axis slide rail (102);

the limiting sliding table (203) is arranged on the side wall of the short edge (W) of the frame body (201 a).

3. The variable pitch blackboard cleaning device of claim 2, characterized in that: the transmission table (202) comprises a table frame (202a), a second sliding block (202b) arranged on the side wall of the upper end of the table frame (202a), a rotating wheel set (202c) and a fixed clamping plate (202d) which are rotatably arranged in the middle of the table frame (202 a);

the second sliding block (202b) is slidably sleeved on the limiting sliding rail (201 b).

4. The variable pitch blackboard cleaning device of claim 3, characterized in that: the variable-pitch assembly (204) comprises a variable-pitch slat (204a) fixedly arranged above the rack (202a), a variable-pitch arc groove (204b) formed in the variable-pitch slat (204a), and a rotating gear (204c) rotatably arranged on the surface of the variable-pitch slat (204 a);

the rotating gear (204c) is coaxially connected with a driving gear (202c-1) in the rotating wheel set (202 c).

5. The variable pitch blackboard cleaning device of claim 4, wherein: the limiting sliding table (203) comprises a sliding table limiting rod (203a) vertically arranged on the side wall of the short side (W) of the frame body (201a), a limiting sliding plate (203b) slidably sleeved on the sliding table limiting rod (203a), connecting buckles (203c) arranged at two ends of the limiting sliding plate (203b), and elastic pieces (203d) arranged between the connecting buckles (203c) and the side wall of the short side (W);

the side wall of the limiting sliding plate (203b) is provided with a through hole (203 b-1).

6. The variable pitch blackboard cleaning device of claim 5, characterized in that: the driving assembly (205) comprises a driving motor (205a), a driving wheel (205b) arranged on an output shaft of the driving motor (205a) and a synchronous belt (205d) arranged between the driving wheel (205b) and a driven wheel (205 c);

the synchronous belt (205d) penetrates through the rotating wheel set (202c) and the fixed clamping plate (202d), is respectively in rotating contact with the driving gear (202c-1) and the synchronous rotating wheel (202c-2) in the rotating wheel set (202c), and is fixedly connected with the fixed clamping plate (202 d).

7. The variable pitch blackboard cleaning device of claim 6, characterized in that: also comprises the following steps of (1) preparing,

the mounting bracket (100) comprises floating mounting plates (101) mounted on the outer frame of the blackboard (H) and optical axis slide rails (102) arranged between the floating mounting plates (101);

the floating mounting plate (101) comprises a first mounting plate (101a) and a second mounting plate (101b) which are arranged in pairs, the first mounting plate (101a) and the second mounting plate (101b) are respectively arranged on the upper end side wall and the lower end side wall of the outer frame of the blackboard (H), and the optical axis slide rail (102) is provided with a first slide rail (102a) and a second slide rail (102 b);

first slide rails (102a) are fixed between the first mounting plates (101a), and second slide rails (102b) are fixed between the second mounting plates (101 b).

8. The variable pitch blackboard cleaning device of claim 7, wherein: the driving motor (205a) is mounted on one side wall of the second mounting plate (101b), and the driven wheel (205c) is mounted on the opposite side wall of the second mounting plate (101 b);

the end parts of the long sides (L) of the frame body (201a) are respectively provided with a first sliding block (201c), and the first sliding block (201c) is respectively sleeved on the first sliding rail (102a) and the second sliding rail (102b) in a sliding manner;

the rack (202a) is slidably sleeved on the second slide rail (102b) through a third slide block (202e) arranged on the side wall of the lower end.

9. A variable pitch blackboard cleaning device according to any one of claims 5 to 8, characterised in that: two ends of the roll shaft (301) are matched and rotated in the through hole (203b-1), and one end of the roll shaft extends and slides in the variable pitch arc groove (204 b);

the driven gear (303) is connected with the rotating gear (204c) through a second synchronous belt (D), and the rotating gear (204c) is located at the radial circle center of the variable pitch arc groove (204 b).

10. A variable pitch blackboard cleaning device according to any one of claims 2 to 8, characterised in that: the axial length of the cleaning roller (302) is smaller than the distance between two short sides (W) of the frame body (201a), and the axial length of the cleaning roller is matched with the width of the blackboard (H).