CN221658772U - Polishing device for precision parts - Google Patents

Abstract

The utility model relates to the technical field of precision part machining, in particular to a polishing device for a precision part, which comprises: the device comprises a device box body, a fixing mechanism for fixing and rotating the round tubular parts, and a dust removing mechanism for cleaning and collecting dust generated in polishing; the fixing mechanism includes: and the rotating rod is rotatably arranged on the side wall of the device box body. According to the utility model, the inner wall of the circular pipe-shaped part can be clamped and fixed through the clamping plate, so that the device is convenient for clamping and fixing the circular pipe-shaped part, a plurality of groups of clamping plates are arranged, the clamping firmness of the circular pipe-shaped part is improved, the clamping stability of the circular pipe-shaped part is good, the problem that the circular pipe-shaped part is deviated and the polishing quality is influenced is avoided, and meanwhile, the circular pipe-shaped part can be driven to rotate, so that the device is convenient for rotating the circular pipe-shaped part, the circular pipe-shaped part can be processed at multiple angles, and the polishing efficiency is improved.

Description

A grinding device for precision parts

Technical Field

The utility model relates to the technical field of precision parts processing, in particular to a grinding device for precision parts.

Background Art

Precision parts are a type of accessories widely used in the automotive, communications, medical, watches, mobile phones, computers and other industries. Unlike ordinary parts, precision parts are more precise and more suitable for industries with high requirements for precision.

A Chinese patent with application number CN202022336263.3 discloses a precision parts grinding device, including a base, a fixed rod is provided at the upper end of the base, an electric slide is provided at one end of the fixed rod, a slider is provided at the lower end of the center of the electric slide, a hydraulic telescopic rod is provided at the lower end of the slider, a grinding motor is provided at the lower end of the hydraulic telescopic rod, a dust removal box is provided at the upper end of the electric slide, a rotating table is provided at the lower end of the grinding motor, a workbench connected to the base is provided at the lower end of the rotating table, and a rotating motor connected to the rotating table is provided at the bottom of the workbench. This precision parts grinding device can achieve the effect of the clamping plate being able to stabilize the parts when grinding the parts by setting a clamping plate and a dust removal box, preventing the parts from being offset during the grinding process, thereby improving the grinding rate and accuracy, and under the action of the dust removal box, the dust generated during the grinding of the parts can be collected and processed to prevent environmental pollution, and also play a certain protective role on the human body.

Existing grinding devices usually use two clamping plates to clamp and fix metal parts, but the setting of the clamping plates is not convenient for clamping and fixing round tubular parts, resulting in poor stability in clamping the round tubular parts, which can easily cause the round tubular parts to shift, affecting the grinding quality, and is not convenient for multi-angle processing of the round tubular parts, reducing the grinding efficiency.

Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects.

Utility Model Content

The purpose of the utility model is to provide a grinding device for precision parts which can effectively solve the above technical problems.

In order to achieve the purpose of this utility model, the following technical solutions are adopted:

A grinding device for precision parts, comprising: a device box, a fixing mechanism for fixing and rotating a round tubular part, and a dust removal mechanism for cleaning and collecting dust generated during grinding; the fixing mechanism comprises: a rotating rod rotatably mounted on the side wall of the device box, a fixing pipe fixedly mounted at one end of the fixing pipe, a movable pipe plugged and mounted in the inner cavity of the fixing pipe, a first electric telescopic rod fixedly mounted in the inner cavities of the fixing pipe and the movable pipe, a square rod fixedly mounted at one end of the movable pipe, a connecting plate fixedly mounted at one end of the square rod, an extrusion block fixedly mounted on one side of the connecting plate, a square tube sleeved on the outer edge of the square rod, and a composite rod fixedly mounted between the square tube and the movable tube. A positioning spring, a clamping rod installed on the outer edge of the square tube, a clamping plate fixedly installed at one end of the clamping rod, a linkage block fixedly installed at the other end of the clamping rod, a clamping spring fixedly installed between the linkage block and the inner wall of the square tube, a circular plate fixedly sleeved on the outer edge of the square tube, and a rotating component arranged on the outside of the device box; the rotating component includes: a first motor fixedly installed on the side wall of the device box, a rotating shaft fixedly installed on the power output shaft of the first motor, a driving gear fixedly installed at one end of the rotating shaft, a driven gear meshingly installed on the top of the driving gear, and the driven gear fixedly installed at one end of an adjacent rotating rod.

Furthermore, the dust removal mechanism includes: a collecting box fixedly installed at the bottom of the inner cavity of the device box, a sealing door hingedly installed on the side of the collecting box, a collecting hood plugged into the top center of the collecting box, a filter screen fixedly installed in the inner cavity of the collecting box, an air pump fixedly installed on the side wall of the device box, an air duct plugged between the collecting box and the air pump, a telescopic hose plugged between the air pump and the device box, an annular tube fixedly installed at one end of the telescopic hose, and a nozzle plugged into the bottom of the annular tube.

Furthermore, a threaded rod is rotatably installed on the side wall of the device box, a second motor is fixedly installed on one end of the threaded rod, a threaded seat is threadedly connected to the outer edge of the threaded rod, a guide rod is installed through the side wall of the threaded seat, both ends of the guide rod are fixedly installed on the inner wall of the device box, a second electric telescopic rod is fixedly installed on the bottom of the threaded seat, a grinder is fixedly installed on the bottom end of the second electric telescopic rod, and the annular tube is fixedly sleeved on the outer edge of the grinder.

Furthermore, sliders are fixedly installed on both sides of the connecting plate, a sliding groove is opened on the inner wall of the square tube, and the slider is located in the inner cavity of the sliding groove; a limiting block is fixedly installed on one side of the linkage block, a limiting groove is opened on the inner wall of the square tube, and the limiting block is located in the inner cavity of the limiting groove.

Furthermore, a transverse plate is fixedly mounted on the inner wall of the device box, and a through hole is opened on the transverse plate.

Furthermore, a box door is hingedly installed on the outer side of the device box, and a visual window is fixedly installed on the box door.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model discloses a grinding device for precision parts. The inner wall of a circular tubular part can be clamped and fixed by a clamping plate, so that the device is convenient for clamping and fixing the circular tubular part. The clamping plates are provided with multiple groups, which improves the firmness of clamping the circular tubular part, makes the clamping stability of the circular tubular part good, avoids the problem that the circular tubular part deviates and affects the grinding quality, and can drive the circular tubular part to rotate at the same time, so that the device is convenient for rotating the circular tubular part, so that the circular tubular part can be processed at multiple angles, and the grinding efficiency is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

FIG1 is a perspective view of a grinding device for precision parts according to the present invention.

FIG. 2 is a front view of a grinding device for precision parts according to the present invention.

FIG3 is an enlarged view of point A in FIG2 of a precision parts grinding device of the present invention.

FIG4 is a cross-sectional view of a component collection box of a precision parts grinding device of the present invention.

FIG5 is a side view of a component thread seat of a precision parts grinding device of the utility model.

In the figure: 1. device box; 2. first motor; 3. driving gear; 4. driven gear; 5. fixed tube; 6. movable tube; 7. first electric telescopic rod; 8. air pump; 9. collection box; 10. annular tube; 11. grinder; 12. second motor; 13. threaded rod; 14. threaded seat; 15. second electric telescopic rod; 16. square rod; 17. connecting plate; 18. extrusion block; 19. square tube; 20. clamping rod; 21. linkage block; 22. clamping plate; 23. clamping spring; 24. filter; 25. guide rod; 26. reset spring; 27. round plate.

DETAILED DESCRIPTION

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are partial embodiments of the utility model, rather than all embodiments.

In the description of the present utility model, it should be understood that the terms "center", "lateral", "longitudinal", "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present utility model. When a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a centered component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centered component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centered component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

As shown in FIG. 1 to FIG. 5 , the utility model is a grinding device for precision parts, comprising: a device housing 1 , a fixing mechanism for fixing and rotating the cylindrical parts, and a dust removal mechanism for cleaning and collecting dust generated during grinding;

The fixing mechanism includes: a rotating rod rotatably mounted on the side wall of the device box 1, a fixed tube 5 fixedly mounted at one end of the rotating rod, a movable tube 6 plugged into the inner cavity of the fixed tube 5, a first electric telescopic rod 7 fixedly mounted in the inner cavities of the fixed tube 5 and the movable tube 6, a square rod 16 fixedly mounted at one end of the movable tube 6, a connecting plate 17 fixedly mounted at one end of the square rod 16, an extrusion block 18 fixedly mounted on one side of the connecting plate 17, a square tube 19 sleeved on the outer edge of the square rod 16, a reset spring 26 fixedly mounted between the square tube 19 and the movable tube 6, a clamping rod 20 installed through the outer edge of the square tube 19, and a fixed mounting. A clamping plate 22 mounted on one end of the clamping rod 20, a linkage block 21 fixedly mounted on the other end of the clamping rod 20, a clamping spring 23 fixedly mounted between the linkage block 21 and the inner wall of the square tube 19, a circular plate 27 fixedly sleeved on the outer edge of the square tube 19, and a rotating assembly arranged on the outer side of the device housing 1, the rotating assembly comprising: a first motor 2 fixedly mounted on the side wall of the device housing 1, a rotating shaft fixedly mounted on the power output shaft of the first motor 2, a driving gear 3 fixedly mounted on one end of the rotating shaft, a driven gear 4 meshingly mounted on the top of the driving gear 3, and the driven gear 4 fixedly mounted on one end of the adjacent rotating rod;

The round tubular part is placed between the two square tubes 19. At this time, the two first electric telescopic rods 7 are started, and the adjacent movable tubes 6 are driven to move inward by the two first electric telescopic rods 7, so that the clamping plates 22 are inserted into the inner cavity of the round tubular part from both ends. When the two ends of the round tubular part are in contact with the adjacent circular plates 27, the square tube 19 no longer moves. At this time, the first electric telescopic rod 7 continues to drive the movable tube 6 to move inward, drives the square rod 16 to move inward through the movable tube 6, drives the connecting plate 17 to move inward through the square rod 16, drives the extrusion block 18 to move inward through the connecting plate 17, and drives the extrusion block 18 to move inward through the extrusion block 18. The pressing block 18 squeezes the adjacent linkage block 21, so that the linkage block 21 moves, and drives the reset spring 26 to stretch, and drives the clamping rod 20 to move through the linkage block 21, and drives the clamping plate 22 to move through the clamping rod 20, and the inner wall of the tubular part can be clamped and fixed by the clamping plate 22, and drives the clamping spring 23 to compress, so that the device is convenient for clamping and fixing the tubular part, and the clamping plate 22 is provided with multiple groups, which improves the firmness of the clamping of the tubular part, makes the clamping of the tubular part stable, and avoids the problem of the deviation of the tubular part and affecting the grinding quality;

When the tubular part is fixed, the first motor 2 is started, the power output shaft of the first motor 2 drives the rotating shaft to rotate, the rotating shaft drives the driving gear 3 to rotate, the driving gear 3 drives the driven gear 4 to rotate, the driven gear 4 drives the adjacent rotating rod to rotate, and the rotating rod drives the adjacent fixed tube 5 to rotate. Since the fixed tube 5 and the movable tube 6 are both square tubes, the movable tube 6 is driven to rotate by the fixed tube 5, and then the tubular part can be driven to rotate, so that the device is convenient for rotating the tubular part, so that the tubular part can be processed at multiple angles, thereby improving the grinding efficiency.

When the grinding is completed, the two first electric telescopic rods 7 are started to drive the adjacent movable tubes 6 to move to both sides, so that the squeezing block 18 has no squeezing effect on the adjacent linkage block 21. At this time, the elastic force of the clamping spring 23 can drive the adjacent clamping rod 20 to reset, and then drive the clamping plate 22 to reset, so that the clamping plate 22 has no clamping and fixing effect on the inner wall of the circular tubular part. At this time, the circular tubular part can be easily disassembled, thereby facilitating the replacement of the circular tubular part.

The dust removal mechanism includes: a collection box 9 fixedly installed at the bottom of the inner cavity of the device box 1, a sealing door hingedly installed on the side of the collection box 9, a collection cover plugged into the center of the top of the collection box 9, a filter screen 24 fixedly installed in the inner cavity of the collection box 9, an air pump 8 fixedly installed on the side wall of the device box 1, an air guide pipe plugged between the collection box 9 and the air pump 8, a telescopic hose plugged between the air pump 8 and the device box 1, an annular tube 10 fixedly installed at one end of the telescopic hose, and a nozzle plugged into the bottom of the annular tube 10;

During the grinding process, the dust can be cleaned and collected by the dust removal mechanism, that is, by starting the air pump 8, the gas in the inner cavity of the collection box 9 can be extracted by the air pump 8, so that the inner cavity of the collection box 9 generates a negative pressure, that is, the inner cavity of the collection cover also generates a negative pressure, and the dust generated by grinding can float down to the inner cavity of the collection cover through the through holes on the horizontal plate. Since the inner cavity of the collection box 9 is in a negative pressure state, the dust in the inner cavity of the collection cover can be adsorbed downward. Through the setting of the filter net 24, the dust in the air in the inner cavity of the collection box 9 can be filtered, so that the dust is retained in the inner cavity of the collection box 9 for collection. At the same time, the gas extracted from the inner cavity of the collection box 9 can be transported to the annular pipe 1 through the telescopic hose by the air pump 8. 0 cavity, and is sprayed out through a plurality of nozzles. Since the annular tube 10 is arranged in an annular manner, a plurality of nozzles are distributed in an annular manner at the bottom of the annular tube 10, so that the gas is evenly discharged, and the polished part is blown comprehensively, the dust is cleaned more comprehensively, and the cleaning effect is improved, so that the device is convenient for cleaning and collecting the dust generated during the polishing process, avoiding dust splashing, pollution to the working environment, and affecting the personal health of the staff. The dust will adhere to the surface of the parts, resulting in scratches on the surface of the parts, which reduces the problem of the polishing effect. At the same time, the method of blowing air from above and sucking dust from below is adopted, so that the dust can be quickly cleaned and collected, and the cleaning and collection effects are improved.

A threaded rod 13 is rotatably mounted on the side wall of the device box 1, a second motor 12 is fixedly mounted on one end of the threaded rod 13, a threaded seat 14 is threadedly connected to the outer edge of the threaded rod 13, a guide rod 25 is penetrated and installed on the side wall of the threaded seat 14, both ends of the guide rod 25 are fixedly mounted on the inner wall of the device box 1, a second electric telescopic rod 15 is fixedly mounted on the bottom of the threaded seat 14, a grinder 11 is fixedly mounted on the bottom end of the second electric telescopic rod 15, and an annular tube 10 is fixedly sleeved on the outer edge of the grinder 11;

By starting the second motor 12, the threaded rod 13 is driven to rotate through the power output shaft of the second motor 12, and the threaded seat 14 is driven to move through the threaded rod 13. The threaded seat 14 is limited by the guide rod, so that the threaded rod 13 rotates to drive the threaded seat 14 to move linearly, and the second electric telescopic rod 15 is driven to move through the threaded seat 14, and the grinder 11 is driven to move through the second electric telescopic rod 15, so that different positions of the tubular parts can be grinded, thereby increasing the grinding range. By starting the second electric telescopic rod 15, the grinder 11 can be driven to move up and down, so as to grind the tubular parts.

Slide blocks are fixedly installed on both sides of the connecting plate 17, a slide groove is provided on the inner wall of the square tube 19, and the slide block is located in the inner cavity of the slide groove. A limit block is fixedly installed on one side of the linkage block 21, and a limit groove is provided on the inner wall of the square tube 19, and the limit block is located in the inner cavity of the limit groove.

The connecting plate 17 can be limited by the sliding of the slider in the inner cavity of the slide groove, and the linkage block 21 can be limited by the sliding of the limiting block in the inner cavity of the limiting groove.

A horizontal plate is fixedly installed on the inner wall of the device box 1, and a through hole is opened on the horizontal plate;

The arrangement of the transverse plate can prevent parts from falling into the collecting cover when parts are replaced, and the arrangement of a plurality of through holes can allow dust to fall into the collecting cover.

A door is hingedly installed on the outside of the device box 1, and a visual window is fixedly installed on the door;

By setting the box door, the device box 1 can be sealed to avoid dust splashing, pollution to the working environment and impact on the personal health of the staff. By setting the viewing window, the staff can observe the grinding of metal parts conveniently.

Working principle: when in use, first place the circular tubular part between the two square tubes 19, then start the two first electric telescopic rods 7, and drive the adjacent movable tubes 6 to move inwards through the two first electric telescopic rods 7, so that the clamping plates 22 are inserted into the inner cavity of the circular tubular part from both ends, and when the two ends of the circular tubular part are in contact with the adjacent circular plates 27, the square tube 19 no longer moves, and at this time the first electric telescopic rod 7 continues to drive the movable tube 6 to move inwards, and drives the square rod 16 to move inwards through the movable tube 6, drives the connecting plate 17 to move inwards through the square rod 16, drives the extrusion block 18 to move inwards through the connecting plate 17, and squeezes the adjacent linkage block 21 through the extrusion block 18, so that the linkage block 21 moves, and drives the reset spring 26 to stretch, and drives the linkage block 21 to move. The movable clamping rod 20 moves, and the clamping plate 22 is driven to move by the clamping rod 20. The inner wall of the tubular part can be clamped and fixed by the clamping plate 22, and the clamping spring 23 is driven to be compressed, so that the device is convenient for clamping and fixing the tubular part. The clamping plate 22 is provided with multiple groups, which improves the firmness of the clamping of the tubular part, makes the clamping stability of the tubular part good, avoids the deviation of the tubular part, and affects the grinding quality. When the tubular part is fixed, the first motor 2 is started, and the power output shaft of the first motor 2 is used to drive the rotating shaft to rotate, and the driving gear 3 is driven to rotate by the rotating shaft, and the driven gear 4 is driven to rotate by the driving gear 3, and the adjacent rotating rod is driven to rotate by the driven gear 4, and the adjacent fixed tube 5 is driven to rotate by the rotating rod. 5 and the movable tube 6 are both square tubes. The movable tube 6 is driven to rotate by the fixed tube 5, and then the circular tubular parts can be driven to rotate, so that the device is convenient for rotating the circular tubular parts, so that the circular tubular parts can be processed at multiple angles, and the grinding efficiency is improved. In the grinding process, the dust can be cleaned and collected by the dust removal mechanism, that is, by starting the air pump 8, the gas in the inner cavity of the collection box 9 can be extracted by the air pump 8, so that the inner cavity of the collection box 9 generates a negative pressure, that is, the inner cavity of the collection cover also generates a negative pressure, and the dust generated by grinding can float downward to the inner cavity of the collection cover through the through holes on the horizontal plate. Since the inner cavity of the collection box 9 is in a negative pressure state, the dust in the inner cavity of the collection cover can be adsorbed downward, and the dust in the air in the inner cavity of the collection box 9 can be filtered by the setting of the filter net 24, so that the dust is retained in the collection box 9. The gas is collected in the inner cavity of the collecting box 9, and the gas extracted from the inner cavity of the collecting box 9 can be transported to the inner cavity of the annular tube 10 through the telescopic hose through the air pump 8, and sprayed out through a number of nozzles. Since the annular tube 10 is arranged in an annular shape, a number of nozzles are distributed in an annular shape at the bottom of the annular tube 10, so that the gas outlet is uniform, and the polished area is blown comprehensively, the dust is cleaned more comprehensively, and the cleaning effect is improved, so that the device is convenient for cleaning and collecting the dust generated in the polishing process, avoiding dust splashing, pollution to the working environment, and affecting the personal health of the staff. Dust will adhere to the surface of the parts, causing scratches on the surface of the parts, reducing the problem of the polishing effect. At the same time, the method of blowing air from above and sucking dust from below is adopted, so that the dust can be quickly cleaned and collected, and the cleaning and collection effects are improved.

The standard parts used in the utility model can be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt the conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt the conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here. The content not described in detail in this specification belongs to the prior art known to professional and technical personnel in this field.

It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims (6)

1. A grinding device for precision parts, characterized by comprising: a device housing, a fixing mechanism for fixing and rotating the tubular parts, and a dust removal mechanism for cleaning and collecting dust generated during grinding; The fixing mechanism comprises: a rotating rod rotatably mounted on the side wall of the device box, a fixing tube fixedly mounted at one end of the rotating rod, a movable tube plugged and mounted in the inner cavity of the fixing tube, a first electric telescopic rod fixedly mounted in the inner cavities of the fixing tube and the movable tube, a square rod fixedly mounted at one end of the movable tube, a connecting plate fixedly mounted at one end of the square rod, an extrusion block fixedly mounted on one side of the connecting plate, a square tube sleeved on the outer edge of the square rod, a return spring fixedly mounted between the square tube and the movable tube, a clamping rod installed through the outer edge of the square tube, a clamping plate fixedly mounted at one end of the clamping rod, a linkage block fixedly mounted at the other end of the clamping rod, a clamping spring fixedly mounted between the linkage block and the inner wall of the square tube, a circular plate fixedly sleeved on the outer edge of the square tube, and a rotating assembly arranged on the outer side of the device box; The rotating assembly includes: a first motor fixedly mounted on the side wall of the device housing, a rotating shaft fixedly mounted on the power output shaft of the first motor, a driving gear fixedly mounted on one end of the rotating shaft, a driven gear meshingly mounted on the top of the driving gear, and the driven gear fixedly mounted on one end of an adjacent rotating rod. 2. A precision parts grinding device as described in claim 1, characterized in that the dust removal mechanism includes: a collecting box fixedly installed at the bottom of the inner cavity of the device box, a sealing door hingedly installed on the side of the collecting box, a collecting hood plugged into the top center of the collecting box, a filter screen fixedly installed in the inner cavity of the collecting box, an air pump fixedly installed on the side wall of the device box, an air duct plugged between the collecting box and the air pump, a telescopic hose plugged between the air pump and the device box, an annular tube fixedly installed at one end of the telescopic hose, and a nozzle plugged into the bottom of the annular tube. 3. A precision parts grinding device as described in claim 2, characterized in that a threaded rod is rotatably mounted on the side wall of the device box, a second motor is fixedly mounted on one end of the threaded rod, a threaded seat is threadedly connected to the outer edge of the threaded rod, a guide rod is penetrated and installed on the side wall of the threaded seat, both ends of the guide rod are fixedly mounted on the inner wall of the device box, a second electric telescopic rod is fixedly mounted on the bottom of the threaded seat, a grinder is fixedly mounted on the bottom end of the second electric telescopic rod, and the annular tube is fixedly sleeved on the outer edge of the grinder. 4. A precision parts grinding device as described in claim 1 is characterized in that sliders are fixedly installed on both sides of the connecting plate, a sliding groove is provided on the inner wall of the square tube, the slider is located in the inner cavity of the sliding groove, a limiting block is fixedly installed on one side of the linkage block, a limiting groove is provided on the inner wall of the square tube, and the limiting block is located in the inner cavity of the limiting groove. 5. A precision parts grinding device as described in claim 1, characterized in that a horizontal plate is fixedly installed on the inner wall of the device box, and a through hole is opened on the horizontal plate. 6. A precision parts grinding device as described in claim 1, characterized in that a box door is hingedly installed on the outer side of the device box, and a visual window is fixedly installed on the box door.