Automatic oil injection tool for sintering machine trolley wheel and using method of automatic oil injection tool

Abstract

According to the automatic oil injection tool for the trolley wheel of the sintering machine, the cleaning device, the oil injection device and the positioning device are controlled through the control cabinet, and when the trolley wheel oil nozzle runs to the position under the first sensor, the cleaning part extends out in the axial direction and cleans the trolley wheel oil nozzle. When the trolley oil nozzle runs to the position under the second sensor, the guide wheel stretches out in the axial direction, and the oil injection part stretches out in the axial direction after delaying for preset time. In the process, the guide wheel makes contact with the trolley wheel and then drives the oil injection device and the positioning device to move, and the oil injection part is in butt joint with the trolley wheel oil nozzle and injects oil according to the preset oil injection amount. And after oil injection is completed, the oil injection device and the positioning device return to the initial position from the oil injection ending position together so as to inject oil to the next trolley wheel, and the operation is repeated until oil injection of all trolley wheels is completed. The quantitative oiling device is simple in structure and convenient to use, the oiling efficiency is effectively improved, man-machine contact is avoided, the safety guarantee for operators is increased, and accurate quantitative oiling can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgy, and in particular to an automatic oil injection tooling for the trolley wheels of a sintering machine and a using method thereof. Background Art

[0002] At present, the sintering machine mainly adopts the form of a belt-type sintering machine. The trolley of the sintering machine is an important component of the sintering machine and runs on the track through the flexible transmission device of the sintering machine. Since the sintering machine operates in a harsh working environment, it is necessary to periodically inject oil into the trolley wheels to improve the bearing lubrication condition and increase the service life of the wheels.

[0003] In the traditional oil injection method, the operator squats beside the running trolley wheel with an oil injection gun in hand and injects grease into the oil nozzle of the running trolley wheel through the oil injection gun for oil injection. This oil injection method is to inject oil with an oil injection gun by the operator close to the running trolley wheel when the equipment is running, which has a risk of human-machine contact; this oil injection method has low oil injection efficiency and high labor cost, and at the same time, manual oil injection is likely to cause differences in the amount of oil injected into each trolley wheel, and thus quantitative oil injection cannot be achieved. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the technical problem to be solved by the present invention is to provide an automatic oil injection tooling for the trolley wheels of a sintering machine and a using method thereof.

[0005] The present invention provides an automatic oil injection tooling for the table wheels of a sintering machine, which includes a control cabinet and a trolley arranged outside the trolley track. A guide rail is provided inside the trolley. Along the direction of the trolley entering, a cleaning device, an oil injection device, and a positioning device with axes perpendicular to the horizontal trolley track are sequentially arranged on the guide rail. The cleaning device is fixed at the end of the guide rail. The cleaning device includes a rotatable cleaning part for cleaning the oil nozzles of the table wheels. The cleaning part can be telescoped along the axial direction, and the cleaning part and the oil nozzles of the table wheels are at the same height. A first sensor is arranged adjacent to the cleaning part, and the first sensor is located on the side where the table wheels enter and is higher than the oil nozzles of the table wheels. When the table wheels run directly below the first sensor, the cleaning part extends axially. The oil injection device and the positioning device can reciprocate on the guide rail. The positioning device includes a telescopic and freely rotatable guide wheel. The oil injection device includes a telescopic oil injection part. The oil injection part is adapted to the oil nozzles of the table wheels and is at the same height. A second sensor is arranged directly above the docking position where the oil injection part extends axially and is docked with the oil nozzles of the table wheels. The distance between the oil injection part and the guide wheel is adapted to the radius of the table wheels. When the table wheels run directly below the second sensor, the guide wheel extends axially until it contacts the table wheels and drives the positioning device and the oil injection device to move synchronously, so that the oil injection part and the oil nozzles of the table wheels are on the same axis. The control cabinet is connected to the cleaning device, the oil injection device, the positioning device, the first sensor, and the second sensor.

[0006] Preferably, the cleaning device further includes a first telescopic cylinder and a motor. The motor is arranged on the piston rod of the first telescopic cylinder, and the piston rod drives the motor to perform telescopic movement. The motor is connected to the cleaning part, and the motor drives the cleaning part to rotate.

[0007] Preferably, a piston rod is arranged on the guide rail, and a sliding table is arranged on the piston rod. The oil injection device and the positioning device are sequentially arranged on the sliding table along the direction of the trolley entering. The sliding table can drive the oil injection device and the positioning device to move along the guide rail.

[0008] Preferably, the oil injection device includes a second telescopic cylinder. The second telescopic cylinder is arranged on the sliding table, and the oil injection part is arranged on the piston rod of the second telescopic cylinder.

[0009] Preferably, the positioning device includes a third telescopic cylinder. The third telescopic cylinder is arranged on the sliding table, and the guide wheel is arranged on the piston rod of the third telescopic cylinder.

[0010] Preferably, the control cabinet includes a control system, an oil injection system, and an electromagnetic control valve group. The control system is connected to the oil injection system and the electromagnetic control valve group. The electromagnetic control valve group is connected to the cleaning device, the oil injection device, the positioning device, and the sliding table. The control system is connected to the first sensor and the second sensor.

[0011] The present invention also provides a method for using an automatic oil injection tooling for a sintering machine trolley, including the following steps:

[0012] In the preparation stage, check and eliminate abnormal conditions of the cleaning device, the oil injection device, and the positioning device to ensure normal working conditions. Check the oil nozzles of the trolley wheels to ensure no missing. Place the trolley outside the track of the trolley wheels.

[0013] In the oil injection stage, start the automatic oil injection tooling and the trolley. The trolley runs at a constant speed of 1 m / min to 4 m / min. When the oil nozzle of the trolley wheel runs directly below the first sensor, the control cabinet controls the cleaning device to extend the cleaning part axially to clean the oil nozzle of the trolley wheel. When the oil nozzle of the trolley wheel runs directly below the second sensor, the control cabinet controls the positioning device to extend the guide wheel axially. After the control cabinet controls the oil injection device to delay for a predetermined time, the oil injection part extends axially. When the guide wheel contacts the trolley wheel and drives the oil injection device and the positioning device to move, the oil injection part is docked with the oil nozzle of the trolley wheel, and the oil injection device injects oil according to the preset oil injection amount of the control cabinet.

[0014] In the oil injection end stage, after the oil injection is completed, the control cabinet controls the oil injection device to stop oil injection, and the oil injection part retracts to the initial position. The control cabinet controls the positioning device to retract the guide wheel axially to the initial position. The control cabinet controls the oil injection device and the positioning device to move from the oil injection end position to the initial position together to prepare for oil injection of the next trolley wheel. This process is repeated until all trolley wheels are completed with oil injection.

[0015] As described above, an automatic oil injection tooling for a sintering machine trolley wheel and its using method involved in the present invention have the following technical effects:

[0016] The present invention controls a cleaning device, an oil injection device, and a positioning device through a control cabinet. When the oil nozzle of the trolley wheel runs directly below the first sensor, the cleaning part extends axially and cleans the oil nozzle of the trolley wheel. When the oil nozzle of the trolley runs directly below the second sensor, the guide wheel extends axially, and the oil injection part extends axially after a predetermined time delay. During this process, after the guide wheel contacts the trolley wheel, it drives the oil injection device and the positioning device to move. The oil injection part docks with the oil nozzle of the trolley wheel and injects oil according to a preset oil injection volume. After the oil injection is completed, the oil injection device and the positioning device jointly return from the oil injection end position to the initial position to inject oil for the next trolley wheel, and so on until all trolley wheels are injected with oil. The structure of the present invention is simple and easy to use, effectively improving the oil injection efficiency, avoiding human-machine contact, increasing the safety guarantee for operators, and being able to achieve precise quantitative refueling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of an automatic oil injection tooling for a sintering machine trolley provided by an embodiment of the present invention.

[0018] DESCRIPTION OF REFERENCE NUMERALS:

[0019] 100, control cabinet; 110, control system; 120, oil injection system; 130, electromagnetic control valve group; 200, trolley; 210, guide rail; 220, cleaning device; 221, cleaning part; 222, first telescopic cylinder; 223, rotating motor; 230, oil injection device; 231, oil injection part; 232, second telescopic cylinder; 240, positioning device; 241, guide wheel; 242, third telescopic cylinder; 250, first sensor; 260, second sensor; 270, first opening; 280, second opening; 300, piston rod; 310, sliding table. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0021] It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0022] As Figure 1 As shown, the present invention provides an embodiment of an automatic lubricating tool for the trolley wheels of a sintering machine, including a control cabinet 100 and a trolley 200 arranged outside the trolley track. The control cabinet 100 is connected to the trolley through lines and pipelines. The trolley 200 is provided with a guide rail 210. Along the direction in which the trolley enters, the guide rail 210 is successively provided with a cleaning device 220, an oil injection device 230, and a positioning device 240 whose axes are perpendicular to the horizontal trolley track. The cleaning device 220 is fixedly arranged at the end of the guide rail 210. The cleaning device 220 includes a rotatable cleaning part 221 for cleaning the oil nozzles of the trolley wheels. The cleaning part 221 can be telescoped in the axial direction. The cleaning part 221 and the oil nozzles of the trolley wheels are at the same height to ensure that each oil nozzle of the trolley wheel can be cleaned before oil injection. A first sensor 250 is arranged adjacent to the cleaning part 221, and the first sensor 250 is located on the side where the trolley wheel enters and is higher than the oil nozzle of the trolley wheel. When the trolley wheel runs directly below the first sensor 250, the cleaning part 221 extends axially. The oil injection device 230 and the positioning device 240 can reciprocate on the guide rail 210 to ensure that they can return to the initial position along the guide rail after oil injection. The positioning device 240 includes a retractable and freely rotatable guide wheel 241. The oil injection device 230 includes a retractable oil injection part 231. The oil injection part 231 is adapted to the oil nozzles of the trolley wheels and is at the same height. A second sensor 260 is arranged directly above the docking position where the oil injection part 231 extends axially and is docked with the oil nozzles of the trolley wheels. The distance between the oil injection part 231 and the guide wheel 241 is adapted to the radius of the trolley wheel. When the oil nozzle of the trolley wheel runs directly below the second sensor 260, the guide wheel 241 extends axially until it contacts the trolley wheel and drives the positioning device 240 and the oil injection device 230 to move synchronously, so that the oil injection part 231 and the oil nozzles of the trolley wheels are on the same axis. The control cabinet 100 is connected to the cleaning device 220, the oil injection device 230, the positioning device 240, the first sensor 250, and the second sensor 260 through lines and pipelines.

[0023] It should be noted that, as Figure 1As shown, the trolley wheels travel from right to left. The first sensor 250 is located on the right side of the cleaning section 221. When the nozzle of the trolley wheel moves to directly below the first sensor 250, the control cabinet 100 controls the cleaning device to extend the cleaning section 221 axially (i.e., in the direction of the trolley wheel) and rotate. At this time, the nozzle of the trolley wheel contacts the cleaning section 221, and thus each nozzle of the trolley wheel can be cleaned. When the nozzle of the trolley wheel moves to directly below the second sensor 260, the control cabinet 100 controls the positioning device 240 to extend the guide wheel 241 axially and contact the moving trolley wheel, so that the moving trolley wheel drives the guide wheel 241 to move, and then the guide wheel 241 drives the entire positioning device 240 and the oil injection device 230 to move synchronously along the guide rail 210 to ensure that the oil injection section 231 can extend axially during movement and dock with the trolley nozzle. It should be emphasized that after the guide wheel 241 contacts the trolley wheel, the oil injection section 231 needs to extend axially 1 second later to make the guide wheel 241 fully contact the trolley wheel for positioning, facilitating the subsequent docking of the oil injection section 231 with the trolley oil injection port.

[0024] Further, the cleaning device 220 further includes a first telescopic cylinder 222 and a rotating motor 223. The rotating motor 223 is arranged on the piston rod of the first telescopic cylinder, and the piston rod drives the rotating motor 223 to perform telescopic movement; the rotating motor 223 is connected to the cleaning section 221, and the rotating motor 223 drives the cleaning section 221 to rotate. Among them, the cleaning section can be prepared with a wire brush. Driven by the rotating motor 223, the wire brush rotates, which can effectively clean the oil stains on the nozzle of the trolley wheel to prepare for the subsequent oil injection process.

[0025] Further, a piston rod 300 is provided on the guide rail 210, and a sliding table 310 is provided on the piston rod 300. The sliding table 310 can reciprocate along the piston rod 300. The oil injection device 230 and the positioning device 240 are sequentially arranged on the sliding table 310 along the trolley driving direction (i.e., the oil injection device is on the right side of the positioning device). The sliding table 310 is connected to the control cabinet 100, and the control cabinet 100 can control the sliding table 310 to drive the oil injection device 230 and the positioning device 240 to slide along the guide rail. When the oil injection device 230 and the positioning device 240 move along with the trolley wheel, after the oil injection device 230 completes the oil injection operation, the control cabinet 100 controls the sliding table 310 to move the oil injection device 230 and the positioning device 240 from the oil injection end position to the initial position to prepare for oil injection of the next trolley wheel.

[0026] Further, the oil filling device 230 includes a second telescopic cylinder 232. The second telescopic cylinder 232 is disposed on the sliding table 310, and the oil filling portion 231 is disposed on the piston rod of the second telescopic cylinder 232. The second telescopic cylinder 232 is connected to the control cabinet 100, and the control cabinet 100 can control the second telescopic cylinder 232 to drive the oil filling portion 231 to extend axially and perform oil filling.

[0027] Further, the positioning device 240 includes a third telescopic cylinder 242. The third telescopic cylinder 242 is disposed on the sliding table 310, and the guide wheel 241 is disposed on the piston rod of the third telescopic cylinder 242. The third telescopic cylinder 242 is connected to the control cabinet 100, and the control cabinet 100 controls the third telescopic cylinder 242 to drive the guide wheel 241 to extend axially and contact the running trolley wheel.

[0028] Further, the control cabinet 100 includes a control system 110, an oil filling system 120, and an electromagnetic control valve group 130. The control system 110 is connected to the oil filling system 120 and the electromagnetic control valve group 130 through pipelines and circuits. The electromagnetic control valve group 130 is connected to the cleaning device 220, the oil filling device 230, the positioning device 240, and the sliding table 310 through pipelines and circuits; the control system 110 is connected to the first sensor 250 and the second sensor 260 through circuits.

[0029] Specifically, the control system 110 is preferably a PLC control system, and the oil filling system 120 is preferably a pneumatic oil filling servo system. The first sensor 250 and the second sensor 260 are preferably laser reflection sensors, so that an action signal can be generated when the oil nozzle of the trolley wheel runs directly below the laser reflection sensor, and the signal is transmitted to the PLC control system. The PLC control system can issue instructions to the electromagnetic control valve group 130 and the pneumatic oil filling servo system according to the preset program and the signals fed back by the first sensor 250 and the second sensor 260, so that the electromagnetic control valve group 130 controls the cleaning device 220, the oil filling device 230, and the positioning device 240 to complete the automatic oil filling action.

[0030] Further, the trolley 200 is provided with a first opening 270 and a second opening 280 on the side close to the trolley wheel. The cleaning portion 221 can perform telescopic movement through the first opening 270; both the guide wheel 241 and the oil filling portion 231 perform telescopic movement through the second opening 280. The guide wheel 241 and the oil filling portion 231 can reciprocate within the second opening 280 to ensure that there is enough space to complete the oil filling of the trolley wheel during the movement of the oil filling portion 231 along with the trolley wheel, and at the same time avoid interference between the trolley and the guide wheel 241.

[0031] The present invention also provides a method for using the automatic oil filling tooling for a sintering machine trolley as described above, which specifically includes the following steps:

[0032] In the preparatory stage, check and eliminate abnormal conditions of the cleaning device 220, the oil injection device 230, and the positioning device 240 to ensure normal working conditions; check the oil nozzles of the trolley wheels to ensure there is no shortage; place the trolley 100 outside the track of the trolley wheel to be oiled, so that the cleaning device 220, the oil injection device 230, and the positioning device 240 are axially aligned with the trolley wheel track, and preset the oil injection pressure of the oil injection device 230 to 0.6 Mpa - 0.8 Mpa.

[0033] In the oil injection stage, start the automatic oil injection tooling and the trolley. The trolley runs at a constant speed of 1 m / min - 4 m / min. When the oil nozzle of the trolley wheel runs directly below the first sensor 250, the first sensor 250 feeds the sensed electrical signal back to the control cabinet 100. The control cabinet 100 controls the cleaning device 220 to make the cleaning part 221 extend axially and rotate to clean the oil nozzle of the trolley wheel. When the oil nozzle of the trolley wheel runs directly below the second sensor 260, the second sensor 260 feeds the sensed electrical signal back to the control cabinet 100. The control cabinet 100 controls the positioning device 240 to make the guide wheel 241 extend axially. After the control cabinet 100 controls the oil injection device 230 to delay for 1 second, the oil injection part 231 extends axially. When the guide wheel 241 contacts the trolley wheel and drives the oil injection device 230 and the positioning device 240 to move synchronously, the oil injection part 231 docks with the oil nozzle of the trolley wheel, and the oil injection device 230 injects oil according to the preset oil injection volume in the control cabinet 100 to improve the oil injection efficiency and reduce the labor intensity of the operators. It should be noted that the number of trolley wheels that have been oiled can be queried through the control cabinet 100, and at the same time, the number of trolley wheels to be oiled can also be set, and the oil injection can be carried out for the set number of wheels.

[0034] In the stage of the end of oil injection, after the oil injection is completed, the control cabinet 100 controls the oil injection device 230 to stop the oil injection of the oil injection part 231, and the oil injection part 231 retracts to the initial position; the control cabinet 100 controls the positioning device 240 to make the guide wheel 241 retract axially to the initial position; the control cabinet 100 controls the oil injection device 230 and the positioning device 240 to move from the end position of oil injection to the initial position together, waiting for the oil injection instruction of the next trolley wheel to inject oil for the next trolley wheel, and so on until all trolley wheels are completed with oil injection. When all the wheels are completed with oil injection, the control cabinet 100, according to the preset program, makes the oil injection device 230 and the positioning device 240 return to the initial position, and the guide wheel 241, the oil injection part 231, and the cleaning part 221 retract to the initial position to avoid human-machine contact during the oil injection process and improve the safety guarantee.

[0035] In summary, the structure of the present invention is simple and easy to use, effectively improves the oil injection efficiency, avoids human-machine contact, increases the safety guarantee for operators, and can achieve precise quantitative oil injection.

[0036] The above embodiments are only illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An automatic oil injection tooling for the trolley wheels of a sintering machine, Characterized in that, it includes a control cabinet (100) and a trolley (200) arranged outside the trolley track. A guide rail (210) is provided inside the trolley (200). Along the trolley driving-in direction, a cleaning device (220), an oil injection device (230) and a positioning device (240) with axes perpendicular to the horizontal trolley track are successively arranged on the guide rail (210). The cleaning device (220) is fixedly arranged at the end of the guide rail (210). The cleaning device (220) includes a rotatable cleaning part (221) for cleaning the oil nozzles of the trolley wheels. The cleaning part (221) can be telescoped in the axial direction, and the cleaning part (221) is at the same height as the oil nozzles of the trolley wheels. A first sensor (250) is arranged adjacent to the cleaning part (221), and the first sensor (250) is located on the driving-in side of the trolley wheel and higher than the oil nozzle of the trolley wheel. When the trolley wheel runs directly below the first sensor (250), the cleaning part (221) extends axially. The oil injection device (230) and the positioning device (240) can reciprocate on the guide rail (210). The positioning device (240) includes a retractable and freely rotatable guide wheel (241). The oil injection device (230) includes a retractable oil injection part (231). The oil injection part (231) is adapted to the oil nozzles of the trolley wheels and is at the same height. A second sensor (260) is arranged directly above the docking position where the oil injection part (231) extends axially and is docked with the oil nozzles of the trolley wheels. The distance between the oil injection part (231) and the guide wheel (241) is adapted to the radius of the trolley wheel. When the oil nozzle of the trolley wheel runs directly below the second sensor (260), the guide wheel (241) extends axially until it contacts the trolley wheel and drives the positioning device (240) and the oil injection device (230) to move synchronously, so that the oil injection part (231) and the oil nozzles of the trolley wheels are on the same axis. The control cabinet (100) is connected to the cleaning device (220), the oil injection device (230), the positioning device (240), the first sensor (250) and the second sensor (260).

2. The automatic oil injection system for the trolley wheels of a sintering machine according to claim 1, Characterized in that, the cleaning device (220) further includes a first telescopic cylinder (222) and a rotary motor (223). The rotary motor (223) is arranged on the piston rod of the first telescopic cylinder, and the piston rod drives the rotary motor (223) to perform telescopic movement. The rotary motor (223) is connected to the cleaning part (221), and the rotary motor (223) drives the cleaning part (221) to rotate.

3. The automatic oil injection system for the trolley wheels of a sintering machine according to claim 2, Characterized in that, A piston rod (300) is provided on the guide rail (210), a sliding table (310) is provided on the piston rod (300), the oil injection device (230) and the positioning device (240) are sequentially arranged on the sliding table (310) along the driving direction of the trolley, and the sliding table (310) can drive the oil injection device (230) and the positioning device (240) to move along the guide rail.

4. The automatic oil injection system for the sintering machine trolley wheel according to claim 3, characterized in that the oil injection device (230) includes a second telescopic cylinder (232), the second telescopic cylinder (232) is arranged on the sliding table (310), and the oil injection part (231) is arranged on the piston rod of the second telescopic cylinder (232).

5. The automatic oil injection system for the sintering machine trolley wheel according to claim 3 or 4, characterized in that the positioning device (240) includes a third telescopic cylinder (242), the third telescopic cylinder (242) is arranged on the sliding table (310), and the guide wheel (241) is arranged on the piston rod of the third telescopic cylinder (242).

6. The automatic oil injection system for the sintering machine trolley wheel according to claim 1 or 2, characterized in that the control cabinet (100) includes a control system (110), an oil injection system (120) and an electromagnetic control valve group (130), the control system (110) is connected to the oil injection system (120) and the electromagnetic control valve group (130), and the electromagnetic control valve group (130) is connected to the cleaning device (220), the oil injection device (230), the positioning device (240) and the sliding table (310); the control system (110) is connected to the first sensor (250) and the second sensor (260).

7. The automatic oil injection tooling for the sintering machine trolley wheel according to claim 1, characterized in that the trolley (200) is provided with a first opening (270) and a second opening (280) on the side close to the trolley wheel, and the cleaning part (221) can move telescopically through the first opening (270); the guide wheel (241) and the oil injection part (231) both move telescopically through the second opening (280), and the guide wheel (241) and the oil injection part (231) can reciprocate within the second opening (280).

8. A method of using the automatic oil injection tooling for the sintering machine trolley as claimed in claim 1, characterized in that it includes the following steps: Preparation stage, check and eliminate abnormal conditions of the cleaning device (220), the oil injection device (230) and the positioning device (240) to ensure normal working conditions; check the oil nozzles of the trolley wheels to ensure no missing; place the trolley (100) outside the track of the trolley wheels. During the oil injection stage, start the automatic oil injection tooling and the trolley. The trolley runs at a constant speed of 1 m / min to 4 m / min. When the oil nozzle of the trolley wheel runs directly below the first sensor (250), the control cabinet (100) controls the cleaning device (220) to extend the cleaning part (221) axially and clean the oil nozzle of the trolley wheel. When the oil nozzle of the trolley wheel runs directly below the second sensor (260), the control cabinet (100) controls the positioning device (240) to extend the guide wheel (241) axially. After the control cabinet (100) controls the oil injection device (230) to delay for a predetermined time, the oil injection part (231) extends axially. When the guide wheel (241) contacts the trolley wheel and drives the oil injection device (230) and the positioning device (240) to move, the oil injection part (231) is docked with the oil nozzle of the trolley wheel, and the oil injection device (230) injects oil according to the preset oil injection volume in the control cabinet (100). During the end stage of oil injection, after the oil injection is completed, the control cabinet (100) controls the oil injection device (230) to stop the oil injection of the oil injection part (231), and the oil injection part (231) retracts to the initial position. The control cabinet (100) controls the positioning device (240) to retract the guide wheel (241) axially to the initial position. The control cabinet (100) controls the oil injection device (230) and the positioning device (240) to move from the oil injection end position to the initial position together to inject oil for the next trolley wheel. This process is repeated until all trolley wheels are completed with oil injection.

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