Injector nut dismounting machine

Abstract

This application relates to an injector nut removal and installation machine, comprising: a frame with an injector rotating seat mounted on it; an adjusting frame movably mounted on the frame, the adjusting frame having a nut limiting sleeve disposed opposite to the injector rotating seat; a moving mechanism connected to the adjusting frame; a rotating mechanism connected to the injector rotating seat, the rotating mechanism including a hydraulic motor, the hydraulic motor being drivenly connected to the injector rotating seat; and a hydraulic system including a hydraulic pump and a pressure regulating component, the hydraulic pump and the hydraulic motor being connected via a connecting pipeline, the pressure regulating component being disposed in the connecting pipeline, and the pressure regulating component being used to regulate the pressure of the hydraulic oil supplied by the hydraulic pump to the hydraulic motor. By adjusting the pressure of the hydraulic oil supplied by the hydraulic pump to the hydraulic motor through the pressure regulating component, the torque applied to the injector is adjusted, avoiding damage to the injector due to excessive torque, thereby helping to reduce maintenance costs, improve maintenance efficiency, reduce the failure rate of the power system, and improve railway safety.

Description

Technical Field

[0001] This application relates to the field of fuel injector technology, and in particular to a fuel injector nut removal and installation machine. Background Technology

[0002] With the rapid development of the railway industry, the requirements for the reliability of power and key components for train operation safety are becoming increasingly stringent. As a core component of the railway locomotive power system, the assembly precision of the fuel injector directly affects the stability of power output and operational safety. Different models and specifications of fuel injectors have strict and differentiated precise requirements for the torque required for nut installation and removal due to differences in structural design, sealing requirements, and compatible locomotive models. Insufficient torque can lead to seal failure and abnormal fuel injection, while excessive torque can easily damage the fuel injector body and thread structure, becoming a potential hazard to the safe operation of railway equipment.

[0003] However, common injector nut removal and installation equipment does not have torque adjustment capabilities, which cannot meet the differentiated torque requirements of injectors. During operation, improper torque can easily damage the injectors, leading to increased maintenance costs, delayed maintenance cycles, and even power system failures, thus reducing railway operation safety. Utility Model Content

[0004] Therefore, it is necessary to provide an injector nut removal and installation machine to address the problem that common injector nut removal and installation equipment does not have torque adjustment capabilities and cannot meet the differentiated torque requirements of injectors.

[0005] This application provides an injector nut removal and installation machine, comprising: a frame, wherein the frame is provided with an injector rotating seat; an adjusting frame, movably mounted on the frame, the adjusting frame being provided with a nut limiting sleeve, the nut limiting sleeve being disposed opposite to the injector rotating seat; a moving mechanism connected to the adjusting frame, used to drive the adjusting frame closer to or further away from the frame; a rotating mechanism connected to the injector rotating seat, the rotating mechanism including a hydraulic motor, the hydraulic motor being kinetically connected to the injector rotating seat; and a hydraulic system including a hydraulic pump and a pressure regulating component, the hydraulic pump being connected to the hydraulic motor via a connecting pipeline, the pressure regulating component being disposed in the connecting pipeline, the pressure regulating component being used to regulate the pressure of the hydraulic oil supplied by the hydraulic pump to the hydraulic motor.

[0006] According to one embodiment of this application, the pressure regulating assembly includes a two-position four-way directional valve, a first relief valve, and a second relief valve. The first valve port of the two-position four-way directional valve is connected to the hydraulic pump, the second valve port of the two-position four-way directional valve is connected to the oil tank, the third valve port of the two-position four-way directional valve is connected to the oil inlet of the first relief valve, and the fourth valve port of the two-position four-way directional valve is connected to the oil inlet of the second relief valve. The oil outlets of both the first relief valve and the second relief valve are connected to the hydraulic motor. When the two-position four-way directional valve is in the first working position, the first valve port and the third valve port of the two-position four-way directional valve are connected, and the second valve port and the fourth valve port are disconnected. When the two-position four-way directional valve is in the second working position, the first valve port and the fourth valve port of the two-position four-way directional valve are connected, and the second valve port and the third valve port are disconnected.

[0007] According to one embodiment of this application, at least one of the first relief valve and the second relief valve is a multi-stage relief valve.

[0008] According to one embodiment of this application, the hydraulic system further includes a first three-position four-way directional valve. The first valve port of the first three-position four-way directional valve is connected to the outlet ports of the first relief valve and the second relief valve. The second valve port of the first three-position four-way directional valve is connected to an oil tank. The third valve port of the first three-position four-way directional valve is connected to one of the oil ports of the hydraulic motor. The fourth valve port of the first three-position four-way directional valve is connected to the other oil port of the hydraulic motor. When the first three-position four-way directional valve is in the first operating position, the first valve port and the third valve port are connected, and the second valve port and the fourth valve port are connected. When the first three-position four-way directional valve is in the second operating position, the first valve port and the fourth valve port are connected, and the second valve port and the third valve port are connected. When the first three-position four-way directional valve is in the third operating position, the first valve port, the second valve port, the third valve port, and the fourth valve port of the first three-position four-way directional valve are all disconnected.

[0009] According to one embodiment of this application, the moving mechanism includes a hydraulic cylinder, the cylinder barrel of which is fixedly connected to the frame, and the piston rod of which is fixedly connected to the adjusting frame.

[0010] According to one embodiment of this application, the hydraulic system further includes a second three-position four-way directional valve. The first valve port of the second three-position four-way directional valve is connected to the hydraulic pump, the second valve port of the second three-position four-way directional valve is connected to the oil tank, the third valve port of the second three-position four-way directional valve is connected to the rod chamber of the hydraulic cylinder, and the fourth valve port of the second three-position four-way directional valve is connected to the rodless chamber of the hydraulic cylinder. When the second three-position four-way directional valve is in the first working position, the first valve port and the third valve port are connected, and the second valve port and the fourth valve port are connected. When the second three-position four-way directional valve is in the second working position, the first valve port and the fourth valve port are connected, and the second valve port and the third valve port are connected. When the second three-position four-way directional valve is in the third working position, the first valve port, the second valve port, the third valve port, and the fourth valve port of the second three-position four-way directional valve are all disconnected.

[0011] According to one embodiment of this application, the moving mechanism further includes at least one guide member, which is fixedly connected to the frame and slidably connected to the adjusting frame.

[0012] According to one embodiment of this application, it further includes: a pressure detection component for detecting the oil supply pressure information of the hydraulic motor and the hydraulic cylinder; and a controller connected to the pressure detection component by signal and electrically connected to the pressure regulating component and the hydraulic pump.

[0013] According to one embodiment of this application, it further includes: a touch screen, mounted on the rack and signal-connected to the controller.

[0014] According to one embodiment of this application, the nut limiting sleeve is detachably installed on the adjusting frame; and / or, the injector rotating seat includes a seat body and an injector limiting sleeve, the injector rotating seat is rotatably installed on the frame and is drivenly connected to the hydraulic motor, and the injector limiting sleeve is detachably connected to the injector rotating seat.

[0015] The aforementioned injector nut removal and installation machine can adjust the pressure of the hydraulic oil supplied by the hydraulic pump to the hydraulic motor through the pressure regulating component according to the different injector models, thereby regulating the torque applied to the injector. This avoids damage to the injector due to excessive torque, which helps to reduce operation and maintenance costs, improve maintenance efficiency, reduce the failure rate of the power system, and improve railway safety. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an injector nut removal and installation machine according to an embodiment of this application.

[0017] Figure 2This is a schematic diagram of the hydraulic system of an injector nut removal and installation machine according to an embodiment of this application.

[0018] Figure 3 This is a schematic diagram of the nut limiting sleeve installation structure of an injector nut removal and installation machine according to an embodiment of this application.

[0019] Figure 4 This is a schematic diagram of the injector rotating seat installation structure of an injector nut removal and installation machine according to an embodiment of this application.

[0020] Figure label:

[0021] 100. Rack;

[0022] 200. Injector rotating seat; 210. Seat body; 211. Transmission part; 212. Adapter part; 213. Connecting part; 214. Second positioning pin; 220. Injector limiting sleeve; 221. Cylinder part; 222. Insertion part; 223. Second positioning hole;

[0023] 300. Adjustment bracket; 310. Mounting hole; 320. First positioning pin;

[0024] 400. Nut limiting sleeve; 410. First positioning hole;

[0025] 500. Moving mechanism; 510. Hydraulic cylinder; 520. Guide component;

[0026] 600. Hydraulic motor;

[0027] 700. Hydraulic system; 701. Hydraulic pump; 702. Two-position four-way directional valve; 703. First relief valve; 704. Second relief valve; 705. First three-position four-way directional valve; 706. Second three-position four-way directional valve; 707. Pressure detection assembly; 708. Oil tank;

[0028] 800. Touch screen. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0035] Combination Figure 1 and Figure 2 An embodiment of this application provides an injector nut removal and installation machine, comprising: a frame 100, an adjusting frame 300, a moving mechanism 500, a rotating mechanism, and a hydraulic system 700. The frame 100 is provided with an injector rotating seat 200. The adjusting frame 300 is movably mounted on the frame 100 and is provided with a nut limiting sleeve 400, which is disposed opposite to the injector rotating seat 200. The moving mechanism 500 is connected to the adjusting frame 300 and is used to drive the adjusting frame 300 closer to or further away from the frame 100. The rotating mechanism is connected to the injector rotating seat 200 and includes a hydraulic motor 600, which is drively connected to the injector rotating seat 200. The hydraulic system 700 includes a hydraulic pump 701 and a pressure regulating component. The hydraulic pump 701 is connected to the hydraulic motor 600 via a connecting pipeline. The pressure regulating component is disposed in the connecting pipeline and is used to regulate the pressure of the hydraulic oil supplied by the hydraulic pump 701 to the hydraulic motor 600.

[0036] The injector rotating seat 200 is used to hold the injector. The size and shape of the injector rotating seat 200 are adapted to the shape of the end of the injector away from the nut. When the injector is placed on the injector rotating seat 200, the injector can cooperate with the injector rotating seat 200 to form a rotation limit. The shape and size of the nut limiting sleeve 400 are adapted to the nut of the injector. When the moving mechanism 500 drives the adjusting frame 300 to approach the frame 100, the nut limiting sleeve 400 on the adjusting frame 300 approaches the injector rotating seat 200 and can be fitted onto the nut of the injector, thus limiting the nut of the injector. At this time, hydraulic oil is supplied to the hydraulic motor 600 by the hydraulic pump 701, causing the hydraulic motor 600 to drive the injector rotating seat 200 to rotate, so that the injector and the nut can rotate relative to each other, realizing the installation and removal of the injector nut. During this process, the pressure of the hydraulic oil supplied by the hydraulic pump 701 to the hydraulic motor 600 can be adjusted by the pressure regulating component according to the different models of the injectors, thereby adjusting the torque applied to the injectors and avoiding damage to the injectors due to excessive torque.

[0037] In some embodiments, the pressure regulating assembly includes a two-position four-way directional valve 702, a first relief valve 703, and a second relief valve 704. The first port of the two-position four-way directional valve 702 is connected to the hydraulic pump 701, the second port of the two-position four-way directional valve 702 is connected to the oil tank 708, the third port of the two-position four-way directional valve 702 is connected to the oil inlet of the first relief valve 703, the fourth port of the two-position four-way directional valve 702 is connected to the oil inlet of the second relief valve 704, and the oil outlets of both the first relief valve 703 and the second relief valve 704 are connected to the hydraulic motor 600.

[0038] When the two-position four-way directional valve 702 is in the first working position, the first valve port of the two-position four-way directional valve 702 is connected to the third valve port, and the second valve port and the fourth valve port are disconnected. At this time, the hydraulic oil supplied by the hydraulic pump 701 can enter the first relief valve 703 and enter the hydraulic motor 600 through the first relief valve 703 to provide power to the hydraulic motor 600.

[0039] When the two-position four-way directional valve 702 is in the second working position, the first valve port of the two-position four-way directional valve 702 is connected to the fourth valve port, and the second valve port and the third valve port are disconnected. At this time, the hydraulic oil supplied by the hydraulic pump 701 can enter the second relief valve 704 and enter the hydraulic motor 600 through the second relief valve 704 to provide power to the hydraulic motor 600.

[0040] It is understandable that the overflow pressures of the first overflow valve 703 and the second overflow valve 704 are different. By switching between the first overflow valve 703 and the second overflow valve 704, the oil supply pressure of the hydraulic motor 600 can be adjusted, thereby adjusting the torque to meet the nut disassembly and assembly requirements of different models of injectors.

[0041] Optionally, at least one of the first relief valve 703 and the second relief valve 704 is a multi-stage relief valve. A multi-stage relief valve can precisely control pressure at different stages according to system requirements, thereby satisfying more levels of torque adjustment. In this embodiment, the multi-stage relief valve can adopt a commonly used multi-stage relief valve structure. The specific structure and model of the multi-stage relief valve are not specifically limited here; in other words, any multi-stage relief valve structure capable of achieving multi-stage pressure regulation is within the protection scope of this embodiment.

[0042] It is understandable that the first relief valve 703 and the second relief valve 704 have at least some of the relief pressures that are different. For example, both the first relief valve 703 and the second relief valve 704 are multi-stage relief valves, and the relief pressure of each stage of the first relief valve 703 is different from the relief pressure of each stage of the second relief valve 704.

[0043] By making at least one of the first relief valve 703 and the second relief valve 704 a multi-stage relief valve, various torque switching can be achieved by switching the first relief valve 703 and the second relief valve 704 and by switching the relief pressure of the first relief valve 703 and / or the second relief valve 704, enabling the injector nut removal and installation machine to meet more types of injector nut switching needs.

[0044] In some embodiments, the hydraulic system 700 further includes a first three-position four-way directional valve 705, the first valve port of the first three-position four-way directional valve 705 being connected to the oil outlet of the first relief valve 703 and the second relief valve 704, the second valve port of the first three-position four-way directional valve 705 being connected to the oil tank 708, the third valve port of the first three-position four-way directional valve 705 being connected to one of the oil ports of the hydraulic motor 600, and the fourth valve port of the first three-position four-way directional valve 705 being connected to the other oil port of the hydraulic motor 600.

[0045] Specifically, when the first three-position four-way directional valve 705 is in the first working position, the first valve port of the first three-position four-way directional valve 705 is connected to the third valve port, and the second valve port is connected to the fourth valve port. When the first three-position four-way directional valve 705 is in the second working position, the first valve port of the first three-position four-way directional valve 705 is connected to the fourth valve port, and the second valve port is connected to the third valve port. When the first three-position four-way directional valve 705 is in the third working position, all four valve ports of the first three-position four-way directional valve 705 are disconnected.

[0046] In this embodiment, by switching the working position of the first three-position four-way directional valve 705, the direction switching and start / stop control of the hydraulic motor 600 can be realized. Specifically, when the first three-position four-way directional valve 705 is in the first working position and when the first three-position four-way directional valve 705 is in the second working position, the hydraulic motor 600 runs in opposite directions, thereby driving the injector nut to rotate in opposite directions, satisfying the two different needs of nut removal and installation. When the first three-position four-way directional valve 705 is in the third working position, the hydraulic motor 600 stops running, and the injector rotating seat 200 does not rotate, which facilitates the preparation work before the injector nut is removed or installed (such as moving the adjustment bracket) and the injector removal operation after the injector nut is removed or installed.

[0047] In some embodiments, the moving mechanism 500 includes a hydraulic cylinder 510, the cylinder barrel of which is fixedly connected to the frame 100, and the piston rod of which is fixedly connected to the adjusting frame 300.

[0048] For example, the adjusting frame 300 is a plate-shaped or nearly plate-shaped frame structure. The adjusting frame 300 is horizontally set above the machine frame 100, and the hydraulic cylinder 510 is vertically set. The cylinder barrel of the hydraulic cylinder 510 is fixedly connected to the upper end of the machine frame 100, and the upper end of the piston rod of the hydraulic cylinder 510 is fixedly connected to the adjusting frame 300.

[0049] In this embodiment, the position adjustment of the adjusting frame 300 is achieved by the extension and retraction of the hydraulic cylinder 510. The hydraulic cylinder 510 can be connected to the hydraulic system 700, and the hydraulic pump 701 supplies oil to the hydraulic cylinder 510. As a result, the overall structure of the injector nut removal and installation machine can be simplified, and the manufacturing cost and failure rate of the injector nut removal and installation machine can be reduced.

[0050] In some embodiments, the hydraulic system 700 further includes a second three-position four-way directional valve 706. The first port of the second three-position four-way directional valve 706 is connected to the hydraulic pump 701, the second port is connected to the oil tank 708, the third port is connected to the rod chamber of the hydraulic cylinder 510, and the fourth port is connected to the rodless chamber of the hydraulic cylinder 510. When the second three-position four-way directional valve 706 is in the first operating position, the first and third ports are connected, and the second and fourth ports are connected. When the second three-position four-way directional valve 706 is in the second operating position, the first and fourth ports are connected, and the second and third ports are connected. When the second three-position four-way directional valve 706 is in the third operating position, all four ports are disconnected.

[0051] The first valve port of the second three-position four-way directional valve 706 can be connected to the first relief valve 703 and the second relief valve 704 to achieve connection with the hydraulic pump 701, or it can be directly connected to the hydraulic pump 701. No specific limitation is made here.

[0052] By switching the operating position of the second three-position four-way directional valve 706, the extension / retraction and length holding actions of the hydraulic cylinder 510 can be switched. Specifically, when the second three-position four-way directional valve 706 is in the first operating position, the high-pressure oil supplied by the hydraulic pump 701 enters the rod chamber of the hydraulic cylinder 510, and the hydraulic oil in the rodless chamber of the hydraulic cylinder 510 flows back to the oil tank 708. The hydraulic cylinder 510 retracts, and the adjusting bracket 300 moves downward closer to the frame 100, thereby shortening the distance between the nut limit sleeve 400 and the injector rotating seat 200. When the second three-position four-way directional valve 706 is in the second operating position, the hydraulic pump... High-pressure oil supplied by 701 enters the rodless chamber of hydraulic cylinder 510, and hydraulic oil in the rod chamber of hydraulic cylinder 510 flows back to oil tank 708. Hydraulic cylinder 510 extends, and adjusting bracket 300 moves upward away from frame 100, thereby increasing the distance between nut limit sleeve 400 and injector rotating seat 200. When the second three-position four-way directional valve 706 is in the third working position, both the rod chamber and rodless chamber of hydraulic cylinder 510 are closed. Hydraulic cylinder 510 maintains its current length, and the distance between adjusting bracket 300 and frame 100, as well as between nut limit sleeve 400 and injector rotating seat 200, remains unchanged.

[0053] In some embodiments, the moving mechanism 500 further includes at least one guide 520, which is fixedly connected to the frame 100 and slidably connected to the adjusting frame 300.

[0054] The guide component 520 can adopt structures such as optical shafts and slide rails.

[0055] Taking the guide component 520 as an example, the optical axis is set vertically and parallel to the extension and retraction direction of the hydraulic cylinder 510. The lower end of the optical axis is fixedly connected to the upper end of the frame 100. The adjustment frame 300 is provided with a vertical through hole. The optical axis passes through the through hole of the adjustment frame 300, thereby guiding the adjustment frame 300 during the lifting and lowering process.

[0056] Optionally, at least two optical axes are provided, and the adjustment bracket 300 slides with at least two optical axes simultaneously.

[0057] Optionally, an anti-detachment component is provided at the upper end of the optical axis to prevent the adjustment bracket 300 from detaching upward from the optical axis.

[0058] Optionally, when there are at least two optical axes, the anti-detachment component is fixedly connected to at least two optical axes at the same time. This not only enables the anti-detachment protection of at least two optical axes through the same anti-detachment component, but also helps to increase the stability of the optical axes and prevent the optical axes from tilting during long-term use.

[0059] In this embodiment, by setting the guide member 520, it is beneficial to improve the stability of the movement of the adjusting frame 300 and the nut limiting sleeve 400 on the adjusting frame 300, so that the nut limiting sleeve 400 can be more smoothly fitted onto the outside of the injector nut or detached from the injector nut. In addition, it can also prevent the hydraulic cylinder 510 from failing due to tangential stress.

[0060] In some embodiments, the injector nut removal and installation machine further includes a pressure detection assembly 707 and a controller. The pressure detection assembly 707 is used to detect the oil supply pressure information of the hydraulic motor 600 and the hydraulic cylinder 510. The controller is signal-connected to the pressure detection assembly 707 and electrically connected to the pressure regulating assembly and the hydraulic pump 701.

[0061] For example, the pressure detection component 707 includes a pressure sensor, which is disposed in the fluid supply line of the hydraulic motor 600 and the hydraulic cylinder 510 and is signal-connected to the controller. The two-position four-way directional valve 702, the first relief valve 703 and the second relief valve 704 of the pressure detection component 707 are solenoid valves. The controller is electrically connected to the coils of the two-position four-way directional valve 702, the first relief valve 703 and the second relief valve 704 and the power supply switch of the drive motor of the hydraulic pump 701, respectively. The controller controls the pressure regulating component and the hydraulic pump 701 based on the pressure information detected by the pressure sensor, thereby realizing the oil supply pressure of the hydraulic motor 600 and the hydraulic cylinder 510 and the start and stop control of the hydraulic pump 701.

[0062] Furthermore, the first three-position four-way directional valve 705 and the second three-position four-way directional valve 706 are solenoid valves. The controller is electrically connected to the first three-position four-way directional valve 705 and the second three-position four-way directional valve 706, thereby realizing the forward and reverse control of the hydraulic motor 600 and the extension and retraction control of the hydraulic cylinder 510.

[0063] The controller in this embodiment can be a programmable logic controller (PLC), which facilitates program configuration as needed.

[0064] Optionally, the pressure detection assembly 707 also includes a pressure gauge to allow operators to observe pressure conditions.

[0065] In some embodiments, the injector nut removal and installation machine also includes a touch screen 800, which is mounted on the frame 100 and connected to the controller signal.

[0066] Optionally, the controller is used to receive input information via the touch screen 800, thereby facilitating operators to perform operations such as program input and selection.

[0067] Optionally, the touchscreen 800 is used to display system status information such as oil supply pressure, thereby facilitating monitoring, adjustment, and other operations by operators.

[0068] In some embodiments, the injector nut removal and installation machine also includes control buttons and control knobs, which are electrically connected to the controller. For example, they may include a power switch knob, an emergency stop switch button, a button for controlling the start and stop of the hydraulic pump 701, a lifting control button for the adjusting frame 300, and a forward and reverse control button for the hydraulic motor 600, etc., so that the operator can select the operation of the injector nut removal and installation machine according to the needs.

[0069] Optionally, control buttons and control knobs are mounted on the rack 100 and located below the touch screen 800 to improve ease of use.

[0070] Combination Figure 3 In some embodiments, the nut limiting sleeve 400 is detachably mounted on the adjusting bracket 300.

[0071] For example, the adjusting frame 300 is provided with a mounting hole 310, which extends vertically through the adjusting frame 300. A first positioning pin 320 is provided on the side of the adjusting frame 300 around the mounting hole 310. The first positioning pin 320 is slidably connected to the adjusting frame 300 along the radial direction of the mounting hole 310. A first positioning hole 410 is provided on the periphery of the nut limiting sleeve 400, and the first positioning pin 320 is inserted into the first positioning hole 410.

[0072] The nut limit sleeve 400 is detachably connected to the adjusting bracket 300, which facilitates the replacement of the nut limit sleeve 400. This reduces maintenance costs and difficulty when the nut limit sleeve 400 is damaged after long-term use. In addition, a suitable nut limit sleeve 400 can be selected according to the different sizes of the injector nut.

[0073] Combination Figure 4 In some embodiments, the injector rotating seat 200 includes a seat body 210 and an injector limiting sleeve 220. The injector rotating seat 200 is rotatably mounted on the frame 100 and is connected to the hydraulic motor 600. The injector limiting sleeve 220 is detachably connected to the injector rotating seat 200.

[0074] For example, the base 210 includes a transmission part 211, a transition part 212, and a connecting part 213 connected in sequence. The transmission part 211 is connected to the output shaft of the hydraulic motor 600 via, for example, a gear set, a belt pair, or a chain pair. The transition part is rotatably connected to the top plate of the frame 100. The connecting part 213 is a sleeve structure and is provided with a second positioning pin 214. The second positioning pin 214 is slidably connected to the connecting part 213. The injector limiting sleeve 220 includes a cylindrical part 221 and a plug-in part 222 connected to each other. The cylindrical part 221 is used to plug into the end of the injector. The plug-in part 222 is plugged into the connecting part 213. The outer wall of the plug-in part 222 is provided with a second positioning hole 223, and the second positioning pin 214 is plugged into the second positioning hole 223.

[0075] Therefore, when the injector limit sleeve 220 is damaged after long-term use, only the injector limit sleeve 220 needs to be replaced, which reduces maintenance costs and difficulty. In addition, the appropriate injector limit sleeve 220 can be selected according to the different sizes of the injector nut, which has better versatility.

[0076] Optionally, the nut limiting sleeve 400 and the adjusting bracket 300 and / or the seat 210 and the injector limiting sleeve 220 are splined together, thereby preventing relative rotation between the nut limiting sleeve 400 and the adjusting bracket 300 and / or between the seat 210 and the injector limiting sleeve 220, and also reducing the force on the first positioning pin 320 and the second positioning pin 214, thus reducing the risk of damage to the first positioning pin 320 and the second positioning pin 214.

[0077] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fuel injector nut removal and installation machine, characterized in that, include: A frame, wherein the frame is provided with an injector rotating seat; An adjustment bracket is movably mounted on the frame, and the adjustment bracket is provided with a nut limiting sleeve, which is disposed opposite to the injector rotating seat; A moving mechanism, connected to the adjusting frame, is used to drive the adjusting frame closer to or further away from the frame; A rotating mechanism is connected to the injector rotating seat, the rotating mechanism including a hydraulic motor, the hydraulic motor being drivenly connected to the injector rotating seat; A hydraulic system includes a hydraulic pump and a pressure regulating component. The hydraulic pump is connected to the hydraulic motor via a connecting pipeline. The pressure regulating component is disposed in the connecting pipeline and is used to regulate the pressure of the hydraulic oil supplied by the hydraulic pump to the hydraulic motor.

2. The injector nut removal and installation machine according to claim 1, characterized in that, The pressure regulating assembly includes a two-position four-way directional valve, a first relief valve, and a second relief valve. The first valve port of the two-position four-way directional valve is connected to the hydraulic pump, the second valve port of the two-position four-way directional valve is connected to the oil tank, the third valve port of the two-position four-way directional valve is connected to the oil inlet of the first relief valve, the fourth valve port of the two-position four-way directional valve is connected to the oil inlet of the second relief valve, and the oil outlets of both the first relief valve and the second relief valve are connected to the hydraulic motor. When the two-position four-way reversing valve is in the first working position, the first valve port of the two-position four-way reversing valve is connected to the third valve port, and the second valve port and the fourth valve port are disconnected. When the two-position four-way directional valve is in the second working position, the first valve port of the two-position four-way directional valve is connected to the fourth valve port, and the second valve port and the third valve port are disconnected.

3. The injector nut removal and installation machine according to claim 2, characterized in that, At least one of the first relief valve and the second relief valve is a multi-stage relief valve.

4. The injector nut removal and installation machine according to claim 2 or 3, characterized in that, The hydraulic system also includes a first three-position four-way directional valve. The first valve port of the first three-position four-way directional valve is connected to the oil outlet of the first relief valve and the second relief valve. The second valve port of the first three-position four-way directional valve is connected to the oil tank. The third valve port of the first three-position four-way directional valve is connected to one of the oil ports of the hydraulic motor. The fourth valve port of the first three-position four-way directional valve is connected to the other oil port of the hydraulic motor. When the first three-position four-way directional valve is in the first working position, the first valve port of the first three-position four-way directional valve is connected to the third valve port, and the second valve port is connected to the fourth valve port. When the first three-position four-way directional valve is in the second working position, the first valve port of the first three-position four-way directional valve is connected to the fourth valve port, and the second valve port is connected to the third valve port. When the first three-position four-way directional valve is in the third working position, the first valve port, the second valve port, the third valve port and the fourth valve port of the first three-position four-way directional valve are all disconnected.

5. The injector nut removal and installation machine according to any one of claims 1 to 3, characterized in that, The moving mechanism includes a hydraulic cylinder, the cylinder barrel of which is fixedly connected to the frame, and the piston rod of which is fixedly connected to the adjusting frame.

6. The injector nut removal and installation machine according to claim 5, characterized in that, The hydraulic system also includes a second three-position four-way directional valve. The first valve port of the second three-position four-way directional valve is connected to the hydraulic pump, the second valve port of the second three-position four-way directional valve is connected to the oil tank, the third valve port of the second three-position four-way directional valve is connected to the rod chamber of the hydraulic cylinder, and the fourth valve port of the second three-position four-way directional valve is connected to the rodless chamber of the hydraulic cylinder. When the second three-position four-way directional valve is in the first working position, the first valve port of the second three-position four-way directional valve is connected to the third valve port, and the second valve port is connected to the fourth valve port. When the second three-position four-way directional valve is in the second working position, the first valve port of the second three-position four-way directional valve is connected to the fourth valve port, and the second valve port is connected to the third valve port. When the second three-position four-way directional valve is in the third working position, the first valve port, the second valve port, the third valve port and the fourth valve port of the second three-position four-way directional valve are all disconnected.

7. The injector nut removal and installation machine according to claim 5, characterized in that, The moving mechanism further includes at least one guide member, which is fixedly connected to the frame and slidably connected to the adjusting frame.

8. The injector nut removal and installation machine according to claim 5, characterized in that, Also includes: A pressure detection component, which is used to detect the oil supply pressure information of the hydraulic motor and the hydraulic cylinder; The controller is signal-connected to the pressure detection component and electrically connected to the pressure regulating component and the hydraulic pump.

9. The injector nut removal and installation machine according to claim 8, characterized in that, Also includes: A touchscreen is mounted on the rack and is signal-connected to the controller.

10. The injector nut removal and installation machine according to any one of claims 1 to 3, characterized in that, The nut limiting sleeve is detachably installed on the adjusting frame; and / or, The injector rotating seat includes a seat body and an injector limiting sleeve. The injector rotating seat is rotatably mounted on the frame and is connected to the hydraulic motor. The injector limiting sleeve is detachably connected to the injector rotating seat.

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