Contact line electric grinding machine

Abstract

The invention provides an electric grinding machine for a contact line, and relates to the field of rail transit. Comprising a movable frame, a guiding and positioning structure, a crawler belt grinding structure, a contact adjusting structure and a detection module. The guiding and positioning structures are arranged on the two opposite sides of the movable frame and used for limiting and guiding the movable frame. The crawler belt polishing structure is arranged in the middle of the moving frame and comprises a roller assembly and abrasive paper, and the roller assembly is detachably sleeved with the abrasive paper; the roller assembly is used for driving abrasive paper to rotate. The contact adjusting structure is movably connected to the bottom of the movable frame and fixedly connected to the bottom of the crawler belt grinding structure, and the contact adjusting structure is used for adjusting the height of the crawler belt grinding structure so that the abrasive paper can be attached to the contact line. The detection module is arranged on the movable frame and used for monitoring the grinding state in real time. The bottom surface of the contact line can be quickly and efficiently polished, the sparking problem of a bow net is relieved, the service life of the contact line is prolonged, the polishing state of the contact line can be monitored in real time, and the polishing efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of rail transportation, and in particular to a contact line electric grinder. Background Art

[0002] Electricity is the power source for urban rail transit trains, and the relationship between the bow and the catenary is a key factor affecting the quality of the pantograph current collection. By reviewing the literature, it was found that all major subways in the country have problems such as arcing of rigid contact networks, abnormal wear of contact wires, and abnormal wear of pantographs, and there are many reasons for their occurrence. On many lines of a certain subway, there were as many as hundreds of contact wire surface wear caused by arcing of the bow and the catenary. Contact wire professionals spent a lot of manpower and material resources to measure and polish the contact wire surface wear. At the same time, line surface damage will worsen the bow-catenary relationship, increase the consumption of the contact wire, and shorten the service life of the contact wire. The annual cost of contact wire replacement is nearly one million.

[0003] At present, the contact line grinding method is basically manual grinding, and a small part is machine grinding. The contact line grinding devices on the market are mainly drum-type grinding. The degree of grinding line surface is difficult to control. The grinding direction is perpendicular to the contact line and is mainly point-type. After the grinding is completed, the contact line cannot be monitored and measured in real time.

[0004] Therefore, improving the contact line grinding efficiency and extending the contact line service life have become difficult problems that need to be solved urgently. The industry is in urgent need of a device that can grind quickly and check the grinding effect in real time. Summary of the invention

[0005] The purpose of the present invention is to provide an electric contact wire grinder, which can quickly and efficiently grind the bottom surface of the contact wire to make the contact wire surface smooth and free of hard spots, reduce the problem of bow net sparking, extend the service life of the contact wire, and can monitor the contact wire grinding status in real time to improve the grinding efficiency.

[0006] The embodiment of the present invention is achieved as follows:

[0007] The embodiment of the present application provides a contact line electric grinder, including a mobile frame, a guide positioning structure, a crawler grinding structure, a contact adjustment structure and a detection module;

[0008] The guide and positioning structures are arranged on opposite sides of the mobile frame, and are used to adapt and abut against the busbars of the contact network to limit and guide the mobile frame;

[0009] The crawler grinding structure is arranged in the middle of the mobile frame, and the crawler grinding structure comprises a roller assembly and sandpaper, and the sandpaper is detachably sleeved on the roller assembly; the roller assembly is used to drive the sandpaper to rotate;

[0010] The contact adjustment structure is movably connected to the bottom of the mobile frame and fixedly connected to the bottom of the crawler grinding structure, and the contact adjustment structure is used to adjust the height of the crawler grinding structure so that the sandpaper can fit the contact line;

[0011] The detection module is arranged on the mobile frame and is used for real-time monitoring of the grinding status.

[0012] Further, based on the above solution, the mobile frame includes two guard plates arranged opposite to each other, and the two guard plates are connected and fixed by a connecting rod;

[0013] The guide and positioning structure includes two groups of guide wheels and two groups of positioning wheels. The two groups of guide wheels are respectively arranged relatively between the two guard plates, and the guide wheels are used to be suspended on the bus; the two groups of positioning wheels are respectively arranged relatively between the two guard plates, and the positioning wheels are located below the guide wheels, and the positioning wheels are used to be inserted into the grooves of the bus; wherein the guide wheels and the positioning wheels are respectively connected to the guard plates by adjustable bolts.

[0014] Further, based on the aforementioned solution, one of the guard plates is provided with an observation window, and the observation window is directly opposite to the track grinding structure.

[0015] Further, based on the above solution, the track grinding structure further includes a mounting plate, and the mounting plate is arranged on the contact adjustment structure;

[0016] The roller assembly includes a driving module and two rollers, the two rollers are rotatably connected to the mounting plate respectively, one of the rollers is elastically connected to the mounting plate and its telescopic direction is toward the other roller; the driving module is connected to the rotating shaft of the other roller; the sandpaper sleeves are arranged on the two rollers.

[0017] Further, based on the aforementioned scheme, the driving module includes a motor, a control module and a battery module, the output shaft of the motor is connected to the rotating shaft of one of the rollers, the control module is electrically connected to the motor, and the battery module is electrically connected to the control module.

[0018] Further, based on the aforementioned solution, the contact adjustment structure includes a first base and an adjustment bracket, the mounting plate is fixedly connected to the first base, the first base is fixedly connected to the adjustment bracket, and the adjustment bracket is connected to the two guard plates through an adjustment nut.

[0019] Further, based on the aforementioned scheme, the contact adjustment structure includes a second base, a bottom plate and an elastic member, the second base is fixedly connected between the bottoms of the two guard plates, the bottom plate is connected to the second base through the elastic member, and the mounting plate is fixedly connected to the bottom plate.

[0020] Further, based on the above solution, the elastic member includes a plurality of first springs and a plurality of spring columns.

[0021] A plurality of the first springs are arranged between the bottom plate and the base at intervals;

[0022] A plurality of spring columns are arranged at both ends of the base, and the spring columns include a top wire and a second spring. One end of the top wire is fixed to the base, and the other end of the top wire extends upward through the bottom plate; the second spring is sleeved outside the top wire.

[0023] Further, based on the aforementioned solution, the detection module includes an intelligent camera, and the intelligent camera is arranged between one ends of the two guard plates.

[0024] Furthermore, based on the above solution, it also includes a rotation speed sensor, which is arranged on one of the rollers and is electrically connected to the control module.

[0025] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0026] The present application provides a guiding and positioning mechanism on the mobile frame, and the guiding and positioning structure is used to adapt and abut against the bus bar of the contact network, so as to limit and guide the mobile frame, so that the mobile frame does not deviate during the mobile grinding process, and the grinding is accurate and efficient; by providing a crawler grinding structure, the roller assembly drives the sandpaper to rotate in a cycle, thereby realizing crawler type grinding, which can grind the bottom surface of the contact line more efficiently and effectively; and sandpaper of different mesh sizes can be replaced for grinding to achieve coarse grinding and fine grinding effects, thereby improving the grinding effect; by providing a contact adjustment structure at the bottom of the crawler grinding structure, the contact adjustment structure is used to adjust the height of the crawler grinding structure, so that the sandpaper can fit the contact line, further improving the grinding effect, and making the grinding more efficient and fine; by providing a detection module for real-time monitoring of the grinding state, the grinding speed or grinding time of the sandpaper can be adjusted according to the grinding effect and grinding degree, so that problems can be discovered and solved in time. The present application can quickly and efficiently grind the bottom surface of the contact wire to make the surface of the contact wire smooth and free of hard spots, reduce the problem of bow net sparking, extend the service life of the contact wire, and can monitor the grinding status of the contact wire in real time to improve the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic structural diagram of a contact wire electric grinder according to an embodiment of the present invention;

[0029] Figure 2 It is a partial structural schematic diagram of a contact line electric grinder according to one embodiment of the present invention;

[0030] Figure 3 It is a partial structural schematic diagram of a contact line electric grinder according to another embodiment of the present invention;

[0031] Figure 4 is a side view of a mounting plate according to an embodiment of the present invention;

[0032] Figure 5 A schematic diagram of contact between the guide and positioning structure, the busbar and the contact wire according to an embodiment of the present invention;

[0033] Figure 6 It is a schematic structural diagram of a contact adjustment structure according to another embodiment of the present invention.

[0034] Icons: 1-movable frame, 11-guard plate, 12-observation window, 13-connecting rod, 2-guide positioning structure, 21-guide wheel, 22-positioning wheel, 3-track grinding structure, 31-roller, 32-drive module, 33-sandpaper, 34-mounting plate, 35-rotating plate, 4-contact adjustment structure, 41-first base, 42-adjusting bracket, 43-second base, 44-bottom plate, 45-elastic part, 451-first spring, 452-spring column, 46-folding lifting platform, 461-top plate, 462-bottom plate, 5-detection module, 51-smart camera, 6-bus, 7-contact line. DETAILED DESCRIPTION

[0035] The embodiments of the present application are described in detail below in conjunction with the drawings in the embodiments of the present application.

[0036] Please refer to Figure 1-Figure 6 , which is a schematic diagram of the overall structure of the contact line electric grinder,

[0037] This embodiment provides a contact line electric grinder, comprising a mobile frame 1, a guide positioning structure 2, a crawler grinding structure 3, a contact adjustment structure 4 and a detection module 5;

[0038] The guiding and positioning structures 2 are arranged on opposite sides of the mobile frame 1, and are used to adapt and abut against the busbar 6 of the contact network to limit and guide the mobile frame 1;

[0039] The crawler grinding structure 3 is arranged in the middle of the mobile frame 1. The crawler grinding structure 3 includes a roller 31 assembly and sandpaper 33. The sandpaper 33 is detachably sleeved on the roller 31 assembly; the roller 31 assembly is used to drive the sandpaper 33 to rotate;

[0040] The contact adjustment structure 4 is movably connected to the bottom of the mobile frame 1 and fixedly connected to the bottom of the crawler grinding structure 3. The contact adjustment structure 4 is used to adjust the height of the crawler grinding structure 3 so that the sandpaper 33 can fit the contact line 7.

[0041] The detection module 5 is disposed on the mobile frame 1 and is used for real-time monitoring of the grinding status.

[0042] Next, an electric grinder for contact wire 7 according to this exemplary embodiment will be further described.

[0043] In some embodiments, reference Figure 1 The above-mentioned guiding and positioning structure 2 is arranged on the opposite sides of the mobile frame 1, and is used to adapt and abut with the bus 6 of the contact network, and limit and guide the mobile frame 1 so that the mobile frame 1 can move along the bus 6 of the contact line 7, and no deviation occurs during the grinding process of the contact line 7, thereby improving the grinding accuracy and performing efficient grinding.

[0044] As a preferred implementation method, refer to Figure 2 and Figure 5 The above-mentioned mobile frame 1 includes two guard plates 11 arranged opposite to each other. The two guard plates 11 are connected and fixed by a connecting rod 13 so that the two guard plates 11 form an integral structure. The above-mentioned guide positioning structure 2 includes two groups of guide wheels 21 and two groups of positioning wheels 22. The two groups of guide wheels 21 are arranged opposite to each other between the two guard plates 11. The guide wheels 21 are used to be suspended on the bus 6 to play a guiding role and facilitate the movement of the grinder; specifically, each group of guide wheels 21 is provided with two, which are arranged horizontally at intervals on the guard plates 11, and can be guided within a certain length range to improve the guiding stability. The two groups of positioning wheels 22 are arranged opposite to each other between the two guard plates 11, and the positioning wheels 22 are located below the guide wheels 21. The positioning wheels 22 are used to be inserted into the groove of the bus 6 to play a positioning role, which can fix the grinder and prevent the motor from vibrating during operation; specifically, each group of positioning wheels 22 is also provided with two, which are arranged horizontally at intervals on the guard plates 11, and can be positioned within a certain length range, thereby improving the positioning and fixing stability. The guide wheel 21 and the positioning wheel 22 are staggered up and down. Generally, the diameter of the positioning wheel 22 is larger than the diameter of the guide wheel 21. Therefore, in order to avoid interference between the two, they are staggered. The bus 6 can also be positioned and guided at multiple points to enhance stability.

[0045] It should be noted that the busbar 6 refers to a device for fixing the contact wire 7 in the rigid contact network; the contact wire 7 is an important component of the electrified railway contact network and is used to directly transmit current to the electric locomotive.

[0046] Among them, the above-mentioned guide wheel 21 and positioning wheel 22 are respectively connected to the guard plate 11 through adjustable bolts. The adjustable bolt threads are penetrated through the screw plate fixed on the outside of the guard plate 11, and the length extending into the guard plate 11 can be adjusted laterally, thereby adjusting the distance between the two groups of guide wheels 21 and the two groups of positioning wheels 22 to adapt to multiple types of buses 6.

[0047] As a preferred embodiment, one of the guard plates 11 is provided with an observation window 12, and the observation window 12 is directly opposite to the track grinding structure 3. The observation window 12 is provided to be a working window for high-altitude personnel to observe and disassemble the track grinding structure 3.

[0048] In some embodiments, reference Figure 1 The above-mentioned crawler grinding structure 3 is arranged in the middle of the mobile frame 1. The crawler grinding structure 3 includes a roller 31 assembly and sandpaper 33. The sandpaper 33 is enclosed in a ring shape and can be detachably mounted on the roller 31 assembly; the roller 31 assembly is used to drive the sandpaper 33 to rotate, and the sandpaper 33 rotates in a cycle to form a crawler grinding structure, which rubs against the contact line 7, and can effectively grind the bottom surface of the contact line 7 to make the surface of the contact line 7 smooth and free of hard spots.

[0049] As a preferred embodiment, the track grinding structure 3 further includes a mounting plate 34, which is arranged on the contact adjustment structure 4. The mounting plate 34 is U-shaped or L-shaped, which is convenient for the installation of the roller 31 assembly. The roller 31 assembly includes a driving module 32 and two rollers 31, which are rotatably connected to the side plates of the mounting plate 34 respectively, one of which is elastically connected to the mounting plate 34 and its telescopic direction is toward the other roller 31; the driving module 32 is connected to the rotating shaft of the other roller 31; and the sandpaper 33 is sleeved on the two rollers 31. The driving module 32 drives one of the rollers 31 to rotate, thereby driving the sandpaper 33 to rotate, and the other roller 31 rotates synchronously driven by the sandpaper 33, which plays an auxiliary role in the rotation of the sandpaper 33. By elastically connecting one of the rollers 31 to the mounting plate 34, the distance between the two rollers 31 can be adjusted, and the sandpaper 33 can be replaced.

[0050] Reference Figure 4Specifically, a rotating plate 35 is provided inside the side plate of the mounting plate 34, the center of the rotating plate 35 is rotatably connected to the mounting plate 34, the roller 31 is rotatably connected to one end of the rotating plate 35, and the other end of the rotating plate 35 is connected to one end of a spring, and the other end of the spring is connected to a position of the mounting plate 34 close to the other roller 31. When the sandpaper 33 is sleeved on the two rollers 31, the spring is in a stretched state, and at this time the spring gives a tensioning force to the sandpaper 33, so that the sandpaper 33 can be tightened for easy grinding; when the sandpaper 33 needs to be replaced, the roller 31 connected to the spring is pressed toward the other roller 31, and the distance between the two is shortened, and the sandpaper 33 can be removed and replaced.

[0051] As a preferred embodiment, the drive module 32 includes a motor, a control module and a battery module. The output shaft of the motor is connected to the rotating shaft of one of the rollers 31, the control module is electrically connected to the motor, and the battery module is electrically connected to the control module. The motor adopts a 24V, 2.0 torque motor, which is combined with the control module to achieve actions such as emergency stop, flipping, and overvoltage protection. The battery module is used to power the grinder to ensure endurance during high-altitude operations. By adopting a high-speed, high-torque motor and using crawler-type sandpaper, the bottom surface of the contact line can be effectively polished to make the surface of the contact line smooth and free of hard spots.

[0052] In some embodiments, reference Figure 1 The contact adjustment structure 4 is movably connected to the bottom of the mobile frame 1 and fixedly connected to the bottom of the track grinding structure 3. The contact adjustment structure 4 is used to adjust the height of the track grinding structure 3 so that the sandpaper 33 can fit the contact line 7, so that the sandpaper 33 can efficiently grind the contact line 7.

[0053] As a preferred implementation method, refer to Figure 2 The contact adjustment structure 4 may include a first base 41 and an adjustment bracket 42. The mounting plate 34 is fixedly connected to the first base 41. The first base 41 is fixedly connected to the adjustment bracket 42. The adjustment bracket 42 is connected to the two guard plates 11 through an adjustment nut. The adjustment bracket 42 may be provided with a waist-shaped hole. The adjustment nut passes through the waist-shaped hole and the guard plate 11 to fix it on the guard plate 11. When the height needs to be adjusted, the adjustment nut is loosened, and the adjustment bracket 42 is moved up or down a certain distance and then tightened.

[0054] As a preferred implementation method, refer to Figure 3 The contact adjustment structure 4 may further include a second base 43, a bottom plate 44 and an elastic member 45. The second base 43 is fixedly connected between the bottoms of the two guard plates 11. The bottom plate 44 is connected to the second base 43 through the elastic member 45. The mounting plate 34 is fixedly connected to the bottom plate 44. That is, the mounting plate 34 is arranged on the bottom plate 44 which can be moved up and down, so that the contact distance between the sandpaper 33 and the contact line 7 can be adjusted.

[0055] Specifically, the elastic member 45 includes a plurality of first springs 451 and a plurality of spring columns 452. The plurality of first springs 451 are arranged at intervals between the bottom plate 44 and the base; the plurality of spring columns 452 are arranged at both ends of the base, and the spring columns 452 include a top screw and a second spring. One end of the top screw is fixed to the base, and the other end of the top screw passes through the bottom plate 44 and extends upward to be flush with the sandpaper 33; the second spring is sleeved outside the top screw. The top screw is used to position the bottom plate 44 to prevent the bottom plate 44 from deflecting when it is lifted or lowered. The first spring 451 and the second spring are used to buffer and adjust the bottom plate 44 so that the grinder can grind to the maximum position.

[0056] As a preferred implementation method, refer to Figure 6 The contact adjustment structure 4 can also be a small manual screw folding lifting platform 46, the mounting plate 34 is fixed on its top plate 461, and its bottom plate 462 is fixedly connected to the guard plate 11. When adjusting the height, the lifting and lowering of the folding lifting platform 46 is controlled by rotating the manual screw.

[0057] In some embodiments, reference Figure 1 and Figure 2 The detection module 5 is arranged on the mobile frame 1 and is used to monitor the grinding status in real time.

[0058] As a preferred embodiment, the detection module 5 includes an intelligent camera 51, which is disposed between one end of the two guard plates 11. In actual use, the intelligent camera 51 is located at the rear end of the moving direction of the mobile frame 1, so as to facilitate the photographing and monitoring of the contact line 7 after grinding, and the grinding effect and degree can be detected in real time through software.

[0059] As a preferred embodiment, the above-mentioned grinder also includes a speed sensor, which is arranged on one of the rollers 31. The speed sensor is electrically connected to the control module for detecting the grinding speed and adjusting the output voltage, thereby changing the motor speed.

[0060] It should be noted that the grinder of the present application can be moved manually, or a mobile driving mechanism can be provided on the mobile frame to enable electric movement.

[0061] Beneficial effects of the embodiments of the present application:

[0062] Fast grinding: The grinder adopts a high-speed, high-torque motor and uses crawler-type sandpaper to effectively grind the bottom surface of the contact line to make the contact line surface smooth and free of hard spots.

[0063] Alleviate the problem of bow-net sparking: The main reason for bow-net sparking is that the current receiving process of electric passenger cars includes mechanical movement and electrical transmission. During the mechanical movement, when the bow-net is offline, arcing and sparking will occur; during the electrical transmission, when there is a potential difference, arcing and sparking will also occur. Therefore, the existence of air gaps and a certain degree of voltage difference are the two basic reasons for the occurrence of arcing and sparking. Through the crawler sandpaper polishing of this application, the air gap between the contact wire and the pantograph is reduced, and the contact area becomes larger and the voltage difference is reduced. Therefore, polishing the contact wire can effectively alleviate the problem of bow-net sparking.

[0064] Extending the service life of the contact line: The increased wear of the contact line is closely related to the non-close fit of the pantograph-net system, the uneven surface, and the hard spots formed by sparks. Sparks occur due to the uneven surface, and hard spots occur due to sparks. The hard spots cause the pantograph and the contact line to spark. This vicious cycle sharply reduces the service life of the contact line. For newly replaced contact lines in areas with serious sparks, the wear reaches the replacement value within half a year. Therefore, timely detection of contact network wear and efficient grinding can extend the service life of the contact line, thereby achieving the economic significance of reducing costs and increasing efficiency.

[0065] Improve construction efficiency: In the past, manual grinding of contact lines was inefficient and the degree of grinding was difficult to control. The use of contact line automatic detection and grinding devices can improve efficiency by 70%, and the grinding machine carries a matrix camera to monitor the grinding process through software, so that problems can be discovered in time and effectively solved.

[0066] In addition, unless otherwise expressly specified or limited, in the embodiments of the present application, if the terms "installation" and "connection" appear, they should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. If the terms "upper", "lower", "left", "right", "inner", "outer", "side" and other directional terms appear, they are only with reference to the direction of the accompanying drawings or the orientation in which the product is usually placed when in use. They are only for the purpose of clearly describing the present application, and do 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 cannot be understood as a limitation on the present application. The terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance; "multiple" means at least two. In the embodiments of the present application, the limitations of relative positional relationships such as parallel, vertical, and aligned are all for the current technological level, rather than absolutely strict limitations. A small amount of deviation is allowed, and approximately parallel, approximately vertical, approximately aligned, etc. are all acceptable. For example, A and B are parallel, which means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0067] The above are only some embodiments and implementation methods of the present application. The protection scope of the present application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of the present application. Any changes or substitutions that can be easily thought of by any technician familiar with the field within the technical scope disclosed in the present application should be covered within the protection scope of the present application.

Claims

1. A contact line electric grinder, characterized in that: It includes a mobile frame, a guide positioning structure, a track grinding structure, a contact adjustment structure and a detection module; The guide and positioning structures are arranged on opposite sides of the mobile frame, and are used to fit and abut against the busbars of the contact network to limit and guide the mobile frame; The crawler grinding structure is arranged in the middle of the mobile frame, and the crawler grinding structure comprises a roller assembly and sandpaper, and the sandpaper is detachably sleeved on the roller assembly; the roller assembly is used to drive the sandpaper to rotate; The contact adjustment structure is movably connected to the bottom of the mobile frame and fixedly connected to the bottom of the crawler grinding structure, and the contact adjustment structure is used to adjust the height of the crawler grinding structure so that the sandpaper can fit the contact line; The detection module is arranged on the mobile frame and is used for real-time monitoring of the grinding status.

2. The contact wire electric grinder according to claim 1, characterized in that: The mobile frame comprises two guard plates arranged opposite to each other, and the two guard plates are connected and fixed by a connecting rod; The guide and positioning structure includes two groups of guide wheels and two groups of positioning wheels. The two groups of guide wheels are respectively arranged relatively between the two guard plates, and the guide wheels are used to be suspended on the bus; the two groups of positioning wheels are respectively arranged relatively between the two guard plates, and the positioning wheels are located below the guide wheels, and the positioning wheels are used to be inserted into the grooves of the bus; wherein the guide wheels and the positioning wheels are respectively connected to the guard plates by adjustable bolts.

3. The contact line electric grinder according to claim 2, characterized in that: One of the guard plates is provided with an observation window, and the observation window is directly opposite to the track grinding structure.

4. The contact line electric grinder according to claim 2, characterized in that: The track grinding structure further comprises a mounting plate, wherein the mounting plate is arranged on the contact adjustment structure; The roller assembly includes a driving module and two rollers, the two rollers are rotatably connected to the mounting plate respectively, one of the rollers is elastically connected to the mounting plate and its telescopic direction is toward the other roller; the driving module is connected to the rotating shaft of the other roller; the sandpaper sleeves are arranged on the two rollers.

5. The contact line electric grinder according to claim 4, characterized in that: The driving module includes a motor, a control module and a battery module. The output shaft of the motor is connected to the rotating shaft of one of the rollers. The control module is electrically connected to the motor. The battery module is electrically connected to the control module.

6. The contact line electric grinder according to claim 4, characterized in that: The contact adjustment structure includes a first base and an adjustment bracket. The mounting plate is fixedly connected to the first base. The first base is fixedly connected to the adjustment bracket. The adjustment bracket is connected to the two guard plates through an adjustment nut.

7. The contact line electric grinder according to claim 4, characterized in that: The contact adjustment structure includes a second base, a bottom plate and an elastic member, the second base is fixedly connected between the bottoms of the two guard plates, the bottom plate is connected to the second base through the elastic member, and the mounting plate is fixedly connected to the bottom plate.

8. The contact line electric grinder according to claim 7, characterized in that: The elastic member includes a plurality of first springs and a plurality of spring columns, A plurality of the first springs are arranged between the bottom plate and the base at intervals; A plurality of spring columns are arranged at both ends of the base, and the spring columns include a top wire and a second spring, one end of the top wire is fixed to the base, and the other end of the top wire passes through the bottom plate and extends upward; The second spring is sleeved outside the top screw.

9. The contact line electric grinder according to claim 2, characterized in that: The detection module comprises an intelligent camera, and the intelligent camera is arranged between one ends of the two guard plates.

10. The contact line electric grinder according to claim 5, characterized in that: It also includes a rotation speed sensor, which is arranged on one of the rollers and is electrically connected to the control module.

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