CN217298765U - Self-cleaning device for optical glass on top of straddle type monorail walking beam - Google Patents

Abstract

The utility model discloses a self-cleaning device for optical glass at the top of a straddle type monorail travelling beam, which comprises an installation bottom plate, light-transmitting glass and a brush head; the brush head is mounted on the mounting base plate through a first supporting mechanism, and the light-transmitting glass is mounted on the mounting base plate through a second supporting mechanism; the self-cleaning device also comprises a driving device, and the brush head is driven by the driving device to clean the surface of the light-transmitting glass. The utility model discloses a first supporting mechanism bears the brush head, bears printing opacity glass through second supporting mechanism to it is right in order to accomplish through drive arrangement drive brush head cleaning on printing opacity glass surface, its stable in structure, clean effectual, and can avoid artifical the participation, improved degree of automation.

Description

Self-cleaning device for optical glass on top of straddle type monorail walking beam

Technical Field

The utility model relates to a track traffic technical field, concretely relates to stride a formula single track and walk line roof beam top optical glass's automatically cleaning device.

Background

The single rail railway is one kind of railway, belongs to the light rail type, and is characterized in that only one rail is used, rather than two balanced rails of the traditional railway. Similar to urban rail transit systems, monorail is mainly used in urban populated areas for carrying passengers. The world monorail has a development history of nearly 200 years, and the monorail train is opened and operated at Chongqing in 2005 in China to the present. With the advance of urbanization construction in China and the combination of the characteristics of numerous population in China, urban rail transit in China will further expand from super-large cities and super-large cities to large, medium and three-wire cities, and because of high subway construction cost, long construction period, noise vibration pollution and the like, monorail transit with low investment, small occupied area, short construction period, low noise and strong adaptability develops rapidly, and in the development process of monorail trains, on-line detection equipment for a monorail travelling part and a current-receiving boot is usually installed in a monorail specially-made travelling beam. The detection modules installed in the special single-rail walking beam generally comprise walking wheel abrasion detection, walking wheel block falling detection, horizontal wheel abrasion detection, horizontal wheel block falling detection, collector shoe carbon sliding plate abrasion detection and collector shoe carbon sliding plate surface state detection, and the detection usually needs a camera. Therefore, the transparent toughened glass is usually installed at the top of the walking beam so as to facilitate a camera to shoot walking wheels rolled on the transparent toughened glass, the walking wheels need to be in direct contact with the transparent toughened glass, so that pollutants are brought to the transparent toughened glass, the pollutants mainly comprise dust, water stains and the like, and the cleaning technology mainly comprises the following steps:

cleaning techniques are generally divided into two broad categories, depending on the media used: wet cleaning techniques and dry cleaning techniques.

(1) The wet cleaning technology mainly comprises: firstly, wiping and cleaning, namely stripping pollutants on the surface of a workpiece by utilizing mechanical force, and realizing the manual regular wiping and cleaning and automatic brushing; however, manual cleaning is time-consuming and labor-consuming, and cleaning frequency is too high for the dusty application environment; secondly, ultrasonic cleaning is carried out, pollutants are removed by utilizing an ultrasonic cavitation effect, and the technology needs optical glass to be detachable and is not suitable for the field of monorail.

(2) The dry cleaning technology mainly comprises the following steps: vacuum plasma cleaning: the technology is used for decontamination by means of collision between ions and optical glass, and the technology is not mature at present, is expensive and is difficult to implement; cleaning with laser: the popularization of the technology is limited due to the problems of light beam energy absorption and conversion and the use cost, and the technology and the vacuum plasma cleaning technology have similar defects; ③ air knife technique: the air knife can provide strong impact and uniform flow of thin and long air flow, and is widely applied to various dust removal, drying, cooling, isolation and the like in industrial production; the air knife can be divided into a standard air knife and a super air knife, the difference lies in that the air curtain of the standard air knife is blown out after deflecting by 90 degrees, the air curtain of the super air knife is blown out horizontally, the energy of the air curtain of the super air knife is stronger, the air consumption is relatively smaller, and the dust removal and water removal effects are better.

Among the above cleaning methods, wiping cleaning and ultrasonic cleaning cannot meet the requirements of automatic cleaning; vacuum plasma cleaning and laser cleaning are expensive and cost is too high; the air knife technology can be suitable for automatic cleaning of a walking wheel detection module (located on the side face of a walking beam), the cost is low, and the air knife device can be installed in the walking beam to meet the limit requirement. However, the existing air knife is not suitable for automatically cleaning the top glass of the walking beam, and due to the installation limit requirement of the monorail vehicle and the consideration of the factors of short working distance and the like of the existing air knife, the air knife device cannot be installed outside the walking beam; the installation in walking roof beam is difficult to realize again that high-pressure wind current leads to toughened glass surface.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a stride a formula single track and walk roof beam top optical glass's automatically cleaning device aims at solving prior art midspan formula single track and walks roof beam top optical glass and be difficult to realize self-cleaning's problem.

For solving the above technical problem, the utility model discloses the technical scheme who adopts does:

a self-cleaning device for optical glass at the top of a straddle type monorail walking beam comprises a mounting base plate, light-transmitting glass and a brush head; the brush head is mounted on the mounting base plate through a first supporting mechanism, and the light-transmitting glass is mounted on the mounting base plate through a second supporting mechanism; the self-cleaning device also comprises a driving device, and the brush head is driven by the driving device to clean the surface of the light-transmitting glass.

As a further technical solution of the above solution, one of the first support mechanism and the second support mechanism is an up-down telescopic mechanism, so that the brush head and the transparent glass can move up and down relatively.

As a further technical solution of the above aspect, the second supporting mechanism includes a mounting box and a jacking mechanism; the light-transmitting glass is arranged at the top of the mounting box; the jacking mechanism is arranged below the mounting box and used for achieving lifting of the mounting box.

As a further technical scheme of the above scheme, the jacking mechanism comprises a screw and a jacking sliding block screwed on the screw; the top of the jacking sliding block is provided with a first jacking inclined plane; the bottom of the mounting box is provided with a second jacking inclined surface matched with the first jacking inclined surface, and the bottom of the mounting box is also provided with a force bearing step used for being in contact with the top of the jacking sliding block; when the jacking sliding block moves towards the mounting box under the rotation action of the screw rod, the mounting box is lifted by the jacking sliding block; when the jacking sliding block moves away from the mounting box under the rotation action of the screw rod, the mounting box descends.

As a further technical scheme of the above scheme, two jacking sliding blocks are provided, and the two jacking sliding blocks are respectively located on two sides of the bottom of the mounting box; two second jacking inclined planes are respectively arranged on two sides of the bottom of the mounting box corresponding to the first jacking inclined planes at the tops of the two jacking sliding blocks; the screw rod is a bidirectional screw rod, and the two jacking sliding blocks are respectively in threaded connection with threads on two sides of the screw rod.

As a further technical solution of the above scheme, the jacking mechanism further comprises a rotation driving mechanism of the screw.

As a further technical scheme of the above scheme, the rotation driving mechanism comprises a motor, a driving wheel, a synchronous belt and a driven wheel; the motor is fixed on the mounting base plate, and the driving wheel is connected to a rotating shaft of the motor; the driven wheel is connected to one end of the screw rod; the synchronous belt is connected with the driving wheel and the driven wheel simultaneously.

As a further technical solution of the above scheme, the second support mechanism further includes a transverse guide rail fixedly mounted on the mounting base plate, and the bottom of the jacking slider is provided with a sliding groove and is slidably connected with the transverse guide rail.

As a further technical solution of the above aspect, the transverse guide rail is a dovetail guide rail; the sliding groove at the bottom of the jacking sliding block is a dovetail sliding groove.

As a further technical scheme of the scheme, a vertical guide rail and a sliding block which are matched with each other are arranged between the first supporting mechanism and the second supporting mechanism.

To sum up, compared with the prior art, the utility model, have following advantage and beneficial effect: the utility model discloses a first supporting mechanism bears the brush head, bears printing opacity glass through second supporting mechanism to it is right in order to accomplish through drive arrangement drive brush head cleaning on printing opacity glass surface, its stable in structure, clean effectual, and can avoid artifical the participation, improved degree of automation.

Drawings

Fig. 1 is a schematic view of the three-dimensional structure of the present invention.

Fig. 2 is a schematic diagram of the structure viewed from the right side of the present invention.

Fig. 3 is a schematic view of the rear view structure of the present invention.

Fig. 4 is a schematic structural diagram of the mounting box of the present invention.

The explanation of each reference number in the figure is: the mounting base plate 1, the support 2, the driving device 3, the brush head 4, the motor 5, the motor base 6, the driving wheel 7, the synchronous belt 8, the bearing seat 9, the driven wheel 10, the screw 11, the transverse guide rail 12, the jacking sliding block 13, the mounting box 14, the light-transmitting glass 15, the vertical guide rail 16, the sliding block 17, the light-transmitting glass mounting position 141, the wire outlet 142, the force bearing step 143 and the second jacking inclined plane 144.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the specific embodiments.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. The terms first, second and the like, if any, are used for distinguishing technical features only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in figures 1-3, the self-cleaning device for the optical glass on the top of the straddle type monorail travelling beam comprises a mounting base plate 1, a light-transmitting glass 15 and a brush head 4. The mounting base plate 1 is fixed in the walking beam in a bolt connection or welding mode and serves as a mounting base of other mechanisms. The brush head 4 is installed on the installation base plate 1 through a first supporting mechanism, and the light-transmitting glass 15 is horizontally arranged and installed on the installation base plate 1 through a second supporting mechanism. The self-cleaning device also comprises a driving device 3, and the brush head 4 is driven by the driving device 3 to complete the cleaning of the surface of the light-transmitting glass 15. The driving device 3 drives the brush head 4 in two ways, namely, the brush head 4 is driven to move back and forth, and the surface of the transparent glass 15 is cleaned in a scraping way; secondly, the brush head 4 is driven to rotate to clean the surface of the transparent glass 15 in a sweeping mode. Secondly, since the transparent glass 15 is required to be used as a supporting surface for the traveling wheels on one hand and a shooting window for the camera on the other hand, the number of bristles in the brush head 4 is preferably in the form of a non-complete circle, preferably in the form of a sector, so that the camera can shoot clear images. After cleaning, the sector area where the bristles are located is far away from the surface of the transparent glass 15, so that the surface of the transparent glass 15 is prevented from being shielded, and the shooting picture of a camera is prevented from being interfered.

However, if the brush head 4 is always on the surface of the transparent glass 15, the brush head will be crushed by the running wheels, which obviously is not favorable for the brush head 4 to maintain a long service life, and the brush head 4 will also interfere with the shooting picture on the surface of the transparent glass 15. For this purpose, the inventor sets one of the first support mechanism and the second support mechanism as an up-and-down telescopic mechanism so that the brush head 4 and the transparent glass 15 can move up and down relatively. Both can set up to brush head 4 up-and-down motion, printing opacity glass 15 is fixed, also can set up to brush head 4 rigid, and printing opacity glass 15 up-and-down motion still can set up to brush head 4 and the equal up-and-down motion of printing opacity glass 15. Therefore, when the transparent glass 15 needs to be cleaned, the brush head 4 and the transparent glass 15 can move to almost the same height, and when the transparent glass 15 does not need to be cleaned, the positions of the brush head 4 and the transparent glass 15 are staggered, so that the brush head 4 is far away from the transparent glass 15, and the walking wheels are prevented from rolling to the brush head 4.

The selection form of the up-down telescopic mechanism is various, and a common air cylinder, a hydraulic cylinder or an electric cylinder can be selected, and the structure form to be described below can be also preferred.

Taking a second supporting mechanism as an example, the second supporting mechanism includes a mounting box 14 and a jacking mechanism; a transparent glass mounting position 141 is arranged at the top of the mounting box 14, and the transparent glass 15 is mounted in the transparent glass mounting position 141; the camera is installed in the installation box 14, and a wire outlet 142 of the camera is further formed on a side wall of the installation box 14. The mounting box 14 is in a horn-shaped opening shape which gradually increases from bottom to top so as to ensure that the camera photographing is not shielded. The jacking mechanism is arranged below the mounting box 14 and used for achieving lifting of the mounting box 14. Under the action of the jacking mechanism, the mounting box 14 and the light-transmitting glass 15 on the mounting box can move up and down, namely move down to the brush head 4 when cleaning is needed, and then ascend to the supporting station to support the travelling wheels to roll after cleaning is finished.

The concrete structure of climbing mechanism as follows: the jacking mechanism comprises a screw rod 11 and a jacking sliding block 13 screwed on the screw rod 11; as shown in fig. 4, the top of the jacking sliding block 13 has a first jacking inclined surface; the bottom of the mounting box 14 is provided with a force bearing step 143 which is flush with the top of the jacking sliding block 13 and a second jacking inclined surface 144 which is matched with the first jacking inclined surface; under the rotation action of the screw 11, when the jacking sliding block 13 moves towards the mounting box 14 along the axis of the screw 11, the mounting box 14 is lifted by the jacking sliding block 13; when the jacking sliding block 13 moves away from the mounting box 14 along the axis of the screw rod 11, the mounting box 14 descends. The jacking inclined plane between the jacking sliding block 13 and the mounting box 14 is a key for promoting the mounting box 14 to move up and down, when the jacking sliding block 13 and the mounting box 14 move oppositely, the jacking inclined plane provides a lifting force for the mounting box 14 to move upwards, and when the jacking sliding block 13 and the mounting box 14 move away from each other, the mounting box 14 descends by means of self gravity. The bearing step 143 is favorable for ensuring that the mounting box 14 and the jacking sliding block 13 have a stable stress relation.

Theoretically speaking, the jacking slide block 13 is provided with at least one jacking requirement which can meet the requirement of the mounting box 14. However, only one jacking sliding block 13 is arranged, so that the mounting box 14 is easily subjected to force along the axial direction of the screw rod 11 caused by a jacking inclined plane, and the mounting box 14 can move along the axial direction of the screw rod 11 while moving vertically and vertically. In order to standardize the movement distance of the mounting box 14, the number of the jacking sliding blocks 13 is two, and the two jacking sliding blocks 13 are respectively positioned on two sides of the bottom of the mounting box 14; the bottom of the mounting box 14 is provided with second jacking inclined planes 144 corresponding to the first jacking inclined planes at the tops of the two jacking sliding blocks 13; the screw 11 is a bidirectional screw, and the two jacking sliding blocks 13 are respectively screwed on the threads on the two sides of the screw 11. Therefore, because the screw threads on the two sides of the screw rod 11 are opposite in rotating direction, the two jacking sliding blocks 13 are synchronously folded and jointly act on the bottom of the mounting box 14, so that the stress of the mounting box 14 in the axial direction of the screw rod 11 is mutually offset, and the mounting box 14 can only act vertically.

As mentioned above, the movement of the jacking-up slider 13 is provided by the screw 11, and the screw 11 can be directly connected to the rotating shaft of the motor, but this is not beneficial to the operation of the motor. Of course, the screw 11 may also use other rotation driving mechanisms as a power source, and in this application, the rotation driving mechanism includes a motor 5, a driving wheel 7, a synchronous belt 8 and a driven wheel 10; the motor 5 is fixed on the mounting base plate 1 through a motor base 6, and the driving wheel 7 is connected to a rotating shaft of the motor 5; the driven wheel 10 is connected to one end of the screw rod 11; the synchronous belt 8 is connected with the driving wheel 7 and the driven wheel 10 at the same time. Meanwhile, two ends of the screw rod 11 are respectively provided with a bearing seat 9, the bearing seats 9 are fixed on the mounting base plate 1, and the screw rod 11 is fixed on the bearing seats 9 through bearings so as to rotate smoothly.

In order to make jacking slider 13 can follow screw rod 11's axis direction round trip movement all the time, this application second supporting mechanism still include fixed mounting in transverse guide 12 on mounting plate 1, jacking slider 13's bottom be equipped with the spout and with transverse guide 12 sliding connection, by transverse guide 12 guide and restriction jacking slider 13's direction of motion. Preferably, the transverse guide rail 12 is a dovetail guide rail, and the sliding groove at the bottom of the jacking sliding block 13 is a dovetail sliding groove. The dovetail groove rail can not only ensure the movement direction, but also ensure that the jacking sliding block 13 can not move up and down, and ensure the uniqueness of the movement direction of the jacking sliding block 13.

The specific structure of the second support mechanism as the up-down telescopic mechanism is described in detail above, and correspondingly, the first support mechanism may also adopt the above structure to perform telescopic motion, and is not described herein again for saving space. In consideration of economic factors such as processing cost, the first supporting mechanism and the second supporting mechanism only need to be provided with one supporting mechanism which can stretch up and down to realize relative up and down movement of the brush head 4 and the transparent glass 15. Therefore, when the second supporting mechanism extends and contracts by adopting the above structure, it is preferable that the first supporting mechanism is fixed on the mounting base plate 1 by adopting the bracket 2, at this time, the brush head 4 is mounted on the top of the bracket 2 by the driving device 3, and at this time, the driving device 3 is preferably one of an air cylinder, a hydraulic cylinder and an electric cylinder, so that the brush head 4 can move back and forth relative to the transparent glass 15, and further, the cleaning of the transparent glass 15 is completed.

Although the two jacking sliders 13 ensure that the mounting box 14 can only receive the lifting force which is vertically upward, other external forces may cause the movement of the mounting box 14 to deviate from the vertical direction, and in order to ensure the stability of the mounting box 14, the present application further provides a vertical guide rail 16 and a slider 17 which are matched with each other between the first supporting mechanism and the mounting box 14 so as to regulate the movement of the mounting box 14, and of course, the vertical guide rail 16 and the slider 17 may also adopt a dovetail form.

To enhance the cleaning effect, the end of the brush head 4 near the light-transmitting glass 15 has a downwardly protruding wiper portion. The preferred material of brush head 4 is for steeping cotton, and the brush head 4 height is slightly less than light-transmitting glass 15 surface during the cleaning to guarantee that the scraping portion of brush head 4 and light-transmitting glass 15 surface have certain packing force.

The light-transmitting glass 15 is used for the camera to photograph light-transmitting and is also used for bearing the pressure of the travelling wheel in time when the vehicle passes, therefore, the light-transmitting glass 15 is further plated with a nano coating on the surface thereof so as to improve the strength and reduce the adsorption of an ash layer and moisture as much as possible.

The working process of the self-cleaning device is as follows: when cleaning is needed, the motor 5 rotates (assuming that the motor 5 rotates clockwise at the moment) and drives the screw rod 11 to rotate through the transmission of the synchronous belt 8, the two jacking sliding blocks 13 on the screw rod 11 move in opposite directions on the dovetail guide rail, and the distance between the two jacking sliding blocks is increased; the mounting box 14 moves vertically downwards under the action of gravity, and when the mounting box 14 moves in place, the driving device 3 starts to move back and forth to drive the brush head 4 to clean the surface of the transparent glass 15; the driving means 3 is in a retracted state after the cleaning is completed.

After cleaning, resetting (passing state) is needed, the driving device 3 is in a return state to ensure that the rising of the mounting box 14 is not interfered, the motor 5 rotates in a reverse direction (namely anticlockwise rotation), the screw rod 11 is driven to rotate through the transmission of the synchronous belt 8, the two jacking sliding blocks 13 on the screw rod 11 move in opposite directions on the dovetail guide rail, and the distance between the two jacking sliding blocks is reduced; the jacking sliding block 13 exerts jacking force on the mounting box 14 through a jacking inclined plane; when the force bearing step 143 of the mounting box 14 is flush with the upper surface of the jacking slider 13, the mounting box 14 stops moving upwards, but the jacking slider 13 still continues to move until the first jacking inclined surface of the jacking slider 13 is aligned with the second jacking inclined surface 144 of the mounting box 14 and then stops moving; when the vehicle passes, the weight of the large shaft of the traveling wheel is sequentially transmitted to the mounting bottom plate 1 through the transparent glass 15, the mounting box 14, the jacking sliding block 13 and the transverse guide rail 12, so that the problem that the traditional jacking mechanism directly receives force is solved.

The self-cleaning device can be arranged in a plurality of walking beams as required, for example, 10 groups are arranged in total, and 5 groups are arranged on the left and the right and are uniformly distributed along the length direction of the track. The number of the device groups and the left and right number can be increased or decreased according to the actual situation; the distance between the self-cleaning devices can be adjusted according to the photographing requirement; the mounting bottom plate 1 and the walking beam are reliably fixed and used for transmitting the load of the walking wheels.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above preferred embodiments should not be considered as limiting the invention, which is intended to be limited only by the scope of the appended claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and such modifications and adaptations are intended to be included within the scope of the invention.

Claims (10)

1. The utility model provides a stride a formula single track walking roof beam top optical glass's automatically cleaning device which characterized in that: comprises a mounting base plate (1), light-transmitting glass (15) and a brush head (4); the brush head (4) is mounted on the mounting base plate (1) through a first supporting mechanism, and the light-transmitting glass (15) is mounted on the mounting base plate (1) through a second supporting mechanism; the self-cleaning device also comprises a driving device (3), and the brush head (4) is driven by the driving device (3) to complete the cleaning of the surface of the light-transmitting glass (15).

2. A self-cleaning device for optical glass on the top of a straddle type monorail travelling beam as claimed in claim 1, wherein: one of the first supporting mechanism and the second supporting mechanism is an up-down telescopic mechanism so that the brush head (4) and the transparent glass (15) can move up and down relatively.

3. A self-cleaning device for optical glass on the top of a straddle type monorail travelling beam as claimed in claim 2, wherein: the second supporting mechanism comprises a mounting box (14) and a jacking mechanism; the light-transmitting glass (15) is arranged at the top of the mounting box (14); the jacking mechanism is arranged below the mounting box (14) and used for lifting the mounting box (14).

4. A self-cleaning device for optical glass on the top of a straddle type monorail travelling beam as claimed in claim 3, wherein: the jacking mechanism comprises a screw rod (11) and a jacking sliding block (13) screwed on the screw rod (11); the top of the jacking sliding block (13) is provided with a first jacking inclined plane; the bottom of the mounting box (14) is provided with a second jacking inclined surface (144) matched with the first jacking inclined surface, and the bottom of the mounting box (14) is also provided with a bearing step (143) used for contacting with the top of the jacking sliding block (13); when the jacking sliding block (13) moves towards the mounting box (14) under the rotating action of the screw rod (11), the mounting box (14) is lifted by the jacking sliding block (13); when the jacking sliding block (13) moves away from the mounting box (14) under the rotating action of the screw rod (11), the mounting box (14) descends.

5. A self-cleaning device for optical glass on the top of a straddle type monorail travelling beam as claimed in claim 4, wherein: the two jacking sliding blocks (13) are arranged, and the two jacking sliding blocks (13) are respectively positioned on two sides of the bottom of the mounting box (14); two second jacking inclined planes (144) are respectively arranged on two sides of the bottom of the mounting box (14) corresponding to the first jacking inclined planes at the tops of the two jacking sliding blocks (13); the screw rod (11) is a bidirectional screw rod, and the two jacking sliding blocks (13) are respectively in threaded connection with threads on two sides of the screw rod (11).

6. A self-cleaning device for optical glass on top of a straddle-type monorail travelling beam as defined in any one of claims 3-5, wherein said self-cleaning device comprises: the jacking mechanism also comprises a rotation driving mechanism of the screw (11).

7. A self-cleaning device for optical glass on the top of a straddle type monorail travelling beam as claimed in claim 6, wherein: the rotation driving mechanism comprises a motor (5), a driving wheel (7), a synchronous belt (8) and a driven wheel (10); the motor (5) is fixed on the mounting base plate (1), and the driving wheel (7) is connected to a rotating shaft of the motor (5); the driven wheel (10) is connected to one end of the screw rod (11); the synchronous belt (8) is connected with the driving wheel (7) and the driven wheel (10) at the same time.

8. A self-cleaning device for optical glass on the top of a straddle type monorail travelling beam as claimed in claim 4 or 5, wherein: the second supporting mechanism further comprises a transverse guide rail (12) fixedly installed on the installation bottom plate (1), and a sliding groove is formed in the bottom of the jacking sliding block (13) and is in sliding connection with the transverse guide rail (12).

9. A self-cleaning device for optical glass on the top of a straddle type monorail travelling beam as claimed in claim 8, wherein: the transverse guide rail (12) is a dovetail guide rail; the sliding groove at the bottom of the jacking sliding block (13) is a dovetail sliding groove.

10. A self-cleaning device for optical glass on the top of a straddle type monorail travelling beam as claimed in claim 2, wherein: and a vertical guide rail (16) and a sliding block (17) which are matched with each other are arranged between the first supporting mechanism and the second supporting mechanism.

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