Pneumatic engine oil sprayer puller

Abstract

The utility model provides a pneumatic type engine oil sprayer puller which comprises a connecting assembly, an air cylinder assembly, a magnetic attraction piston and an elastic piece. One end of the connecting assembly is detachably connected with the to-be-detached fuel injector, and the other end is connected with the cylinder assembly; an airflow cavity is formed in the air cylinder assembly and is divided into an upper cavity and a lower cavity by the magnetic attraction piston; the air cylinder assembly is provided with a first circulation opening and a second circulation opening. The two ends of the elastic piece abut against the magnetic attraction piston and the bottom wall of the upper cavity respectively. The magnetic attraction piston is separably attracted to the bottom wall of the lower cavity through magnetic force. When the pneumatic type engine fuel injector puller is in the state of pulling the fuel injector to be disassembled, external air enters the lower cavity from the first circulation opening at the set pressure, the magnetic attraction piston is pushed to overcome the magnetic force and the elastic force of the elastic piece to move towards the upper cavity, and therefore the connecting assembly pulls the fuel injector to be disassembled. According to the utility model, the oil injector to be disassembled is drawn and disassembled by utilizing inertia.

Description

Technical Field

[0001] The utility model relates to the technical field of engine fuel injector disassembly and assembly equipment, in particular to a pneumatic engine fuel injector puller. Background Art

[0002] With the rapid development of engineering machinery containing engines, such as automobiles, the performance and reliability of fuel injectors, as core components of the engine fuel system, directly affect the engine's operating efficiency and emission levels. During long-term use, fuel injectors may malfunction due to wear, carbon deposits or other factors, and therefore require regular inspection or replacement. However, fuel injectors are usually installed in the engine's cylinder head, with a compact structure and limited space inside the cylinder head, making the removal process of the fuel injector particularly complex and difficult.

[0003] Currently, the most common method for disassembling fuel injectors is to manually pry them out using simple tools such as crowbars and hammers. This manual prying method is not only inefficient, but also easily causes damage (such as scratches and deformation) to the fuel injector itself and surrounding components, thereby affecting the subsequent installation and use of fuel injectors and other structures. In addition, for fuel injectors with precise internal designs, manual prying may also damage their precise internal structures (such as internal sealing structures), which may easily lead to safety hazards such as fuel leakage. Utility Model Content

[0004] The utility model provides a pneumatic engine injector puller to solve the problem in the prior art that the manual prying method of the injector is low in disassembly efficiency and easy to damage the injector.

[0005] In order to solve the above problems, the utility model provides a pneumatic engine injector puller, comprising: a connecting assembly, a cylinder assembly, a magnetic piston, and an elastic member; one end of the connecting assembly is detachably connected to the injector to be disassembled, and the other end is connected to the cylinder assembly; an air flow chamber is provided inside the cylinder assembly, and the magnetic piston is slidably arranged in the air flow chamber and cooperates with the inner wall of the air flow chamber to seal and limit the position to separate the air flow chamber into an upper chamber and a lower chamber; the cylinder assembly has a first flow port at one end close to the connecting assembly and a second flow port at one end away from the connecting assembly, the first flow port can be connected to the lower chamber in an on-off manner, and the second flow port can be connected to the upper chamber in an on-off manner; the elastic member is provided in the air flow chamber, and its two ends are respectively connected to the magnetic piston The plug and the bottom wall of the upper chamber are in abutment with each other, and the elastic member is used to provide elastic force to drive the magnetic piston to move toward the connecting assembly; the magnetic piston is detachably adsorbed on the bottom wall of the lower chamber by magnetic force; wherein, when the pneumatic engine injector puller is in a state of pulling the injector to be removed, external gas enters the lower chamber from the first flow port at a set pressure, pushing the magnetic piston to overcome the magnetic force and the elastic force of the elastic member to move toward the upper chamber, so that the connecting assembly pulls the injector to be removed, and the second flow port is opened to reduce the pressure in the upper chamber; when the pneumatic engine injector puller is in a reset state, the first flow port is opened to exhaust, so that the pressure in the lower chamber is reduced, the elastic member pushes the magnetic piston to reset, and the magnetic piston is adsorbed and fixed to the bottom wall of the lower chamber.

[0006] Furthermore, the pneumatic engine injector puller further includes a filter, which is arranged at the first flow port and is used to filter the gas entering the air flow cavity.

[0007] Furthermore, the cylinder assembly includes a cylinder body and a top cover, the interior of the cylinder body is an airflow cavity, the top cover is detachably arranged at one end of the cylinder body away from the connecting assembly, and is sealed with the cylinder body to close the airflow cavity; wherein, the second flow port can be opened and closed on the top cover.

[0008] Furthermore, the top cover is detachably mounted on the cylinder body by a plurality of bolts; the cylinder assembly also includes a one-way air outlet valve, which is arranged at the second flow port and is used to control the opening and closing of the second flow port; wherein, after the pressure in the airflow chamber is greater than a set value, the one-way air outlet valve opens to allow the gas in the airflow chamber to be discharged from the second flow port in one direction.

[0009] Furthermore, the connecting assembly includes a connecting rod and a connecting seat, the connecting seat is detachably connected to the cylinder assembly, one end of the connecting rod is detachably connected to the connecting seat by threaded fitting, and the other end is detachably connected to the injector to be removed by threaded fitting.

[0010] Furthermore, the end of the magnetic piston facing the connecting assembly is made of neodymium iron boron magnet material; the magnetic piston has a wear-resistant coating on its circumference to reduce wear of the magnetic piston; and / or the cylinder assembly is made of aluminum alloy material, and the inner wall of the air flow chamber has a wear-resistant coating to reduce wear of the inner wall of the air flow chamber; and / or the elastic member is an alloy steel spring.

[0011] Furthermore, the pneumatic engine injector puller further includes a handle, which is fixedly arranged on the outside of the cylinder assembly for a worker to hold; and / or, the pneumatic engine injector puller further includes at least one heat dissipation rib, which is arranged on the cylinder assembly for exchanging heat with external air to cool the cylinder assembly.

[0012] Furthermore, the second circulation port and / or the first circulation port adopts a streamlined design; the connection between the inner wall of the second circulation port and the upper cavity and / or the connection between the inner wall of the first circulation port and the lower cavity is rounded.

[0013] Furthermore, the pneumatic engine injector puller also includes a sealing ring, which is sleeved on the outer periphery of the magnetic piston and slidingly sealed with the inner wall of the air flow cavity to isolate the upper cavity and the lower cavity; wherein the sealing ring is an O-ring and is made of fluororubber material.

[0014] Furthermore, the pneumatic engine injector puller also includes an air source and a switch valve. The air source is connected to the first flow port through a pipeline and is used to deliver gas of set pressure into the air flow cavity; the switch valve is arranged at the first flow port and is used to control the opening and closing of the first flow port.

[0015] Applying the technical solution of the utility model, the utility model provides a pneumatic engine injector puller, comprising: a connecting assembly, a cylinder assembly, a magnetic piston, and an elastic member; one end of the connecting assembly is detachably connected to the injector to be removed, and the other end is connected to the cylinder assembly; an air flow chamber is provided inside the cylinder assembly, and the magnetic piston is slidably arranged in the air flow chamber and is sealed and limited with the inner wall of the air flow chamber to separate the air flow chamber into an upper chamber and a lower chamber; the cylinder assembly has a first flow port at one end close to the connecting assembly and a second flow port at one end away from the connecting assembly, the first flow port can be connected to the lower chamber in an on-off manner, and the second flow port can be connected to the upper chamber in an on-off manner; the elastic member is provided in the air flow chamber, and its two ends are respectively connected to the magnetic piston. The suction piston and the bottom wall of the upper chamber are in abutment with each other, and the elastic member is used to provide elastic force to drive the magnetic suction piston to move toward the connecting assembly; the magnetic suction piston is detachably adsorbed on the bottom wall of the lower chamber by magnetic force; wherein, when the pneumatic engine injector puller is in a state of pulling the injector to be removed, external gas enters the lower chamber from the first flow port at a set pressure, pushing the magnetic suction piston to overcome the magnetic force and the elastic force of the elastic member to move toward the upper chamber, so that the connecting assembly pulls the injector to be removed, and the second flow port is opened to reduce the pressure in the upper chamber; when the pneumatic engine injector puller is in a reset state, the first flow port is opened to exhaust, so that the pressure in the lower chamber is reduced, the elastic member pushes the magnetic suction piston to reset, and the magnetic suction piston is adsorbed and fixed to the bottom wall of the lower chamber.

[0016] The utility model sets a connecting assembly, a cylinder assembly, a magnetic piston and an elastic member to work together, so that after the airflow in the lower cavity of the air flow chamber pushes the magnetic piston to separate from the bottom wall of the connecting assembly, the magnetic force on the magnetic piston will quickly decrease, thereby allowing the magnetic piston to impact the bottom wall of the upper cavity of the air flow chamber at high speed, thereby allowing the connecting assembly and the cylinder assembly to have the inertia of movement away from the injector to be disassembled, and utilizing the inertia to achieve the pulling and disassembly of the injector to be disassembled; by setting an elastic member to drive the magnetic piston to move toward the connecting assembly, utilizing the elastic force of the elastic member, both the reliable resetting of the magnetic piston is achieved and the direct impact of the magnetic piston on the bottom wall of the upper cavity of the air flow chamber is avoided, thereby effectively protecting the magnetic piston and the cylinder assembly; the pneumatic engine injector puller proposed by the utility model is different from the existing one that relies on manual operation of the crowbar The method of forcibly prying out the injector with simple tools such as a punch and a hammer is not used. The utility model not only has high disassembly efficiency, but also avoids damage such as scratches and deformation to the injector itself and surrounding components, thereby reducing the adverse effects on the subsequent installation and use of the injector and other structures; in addition, for injectors with precise internal design, the utility model also protects precise structures such as the sealing structure inside the injector during the pulling and disassembly process, thereby avoiding safety hazards such as fuel leakage; the pneumatic engine injector puller proposed in the utility model adopts the pneumatic drive principle and is driven by high-pressure gas to achieve smooth, rapid and non-destructive pulling and disassembly of the injector. The utility model has a simple structure and low cost, is easy to assemble, operate and subsequently maintain, can effectively reduce the labor intensity of operators, and is suitable for large-scale promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A partial structural diagram of a pneumatic engine injector puller provided by an embodiment of the present utility model is shown;

[0019] Figure 2 A partial structural schematic diagram of the pneumatic engine injector puller provided by an embodiment of the present utility model in the initial standby state is shown;

[0020] Figure 3 A partial structural diagram of the pneumatic engine injector puller provided by an embodiment of the present utility model is shown at the beginning of air intake;

[0021] Figure 4 A schematic diagram of a portion of the structure of the pneumatic engine injector puller provided by an embodiment of the present utility model is shown when pulling the injector;

[0022] Figure 5 A partial structural schematic diagram of a pneumatic engine injector puller provided by an embodiment of the present utility model during resetting is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. Connecting assembly; 11. Connecting rod; 12. Connecting seat;

[0025] 20. Cylinder assembly; 21. Air flow chamber; 22. First flow port; 23. Second flow port; 24. Cylinder body; 25. Top cover; 26. One-way air outlet valve;

[0026] 30. Magnetic piston;

[0027] 40. Elastic parts;

[0028] 50. Sealing ring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] like Figures 1 to 5As shown, an embodiment of the present invention provides a pneumatic engine injector puller, comprising: a connecting assembly 10, a cylinder assembly 20, a magnetic piston 30, and an elastic member 40; one end of the connecting assembly 10 is detachably connected to the injector to be disassembled, and the other end is connected to the cylinder assembly 20; the cylinder assembly 20 has an air flow chamber 21 inside, and the magnetic piston 30 is slidably arranged in the air flow chamber 21, and is sealed and limited with the inner wall of the air flow chamber 21 to separate the air flow chamber 21 into an upper chamber and a lower chamber; the cylinder assembly 20 has a first flow port 22 at one end close to the connecting assembly 10, and a second flow port 23 at one end away from the connecting assembly 10, the first flow port 22 can be connected to the lower chamber in an on-off manner, and the second flow port 23 can be connected to the upper chamber in an on-off manner; the elastic member 40 is arranged in the air flow chamber 21, and both ends The elastic member 40 is respectively in contact with the magnetic piston 30 and the bottom wall of the upper chamber, and is used to provide an elastic force to drive the magnetic piston 30 to move toward the connecting assembly 10; the magnetic piston 30 is detachably adsorbed on the bottom wall of the lower chamber by magnetic force; wherein, when the pneumatic engine injector puller is in the state of pulling the injector to be removed, external gas enters the lower chamber from the first flow port 22 at a set pressure, pushing the magnetic piston 30 to overcome the magnetic force and the elastic force of the elastic member 40 to move toward the upper chamber, so that the connecting assembly 10 pulls the injector to be removed, and the second flow port 23 is opened to reduce the pressure in the upper chamber; when the pneumatic engine injector puller is in the reset state, the first flow port 22 is opened to exhaust, so that the pressure in the lower chamber is reduced, and the elastic member 40 pushes the magnetic piston 30 to reset, and the magnetic piston 30 is adsorbed and fixed to the bottom wall of the lower chamber.

[0031] The utility model is provided with a connecting assembly 10, a cylinder assembly 20, a magnetic piston 30 and an elastic member 40 that work in coordination, so that after the airflow in the lower cavity of the air flow chamber 21 pushes the magnetic piston 30 to separate from the bottom wall of the connecting assembly 10, the magnetic force on the magnetic piston 30 will be rapidly reduced, thereby allowing the magnetic piston 30 to impact the bottom wall of the upper cavity of the air flow chamber 21 at high speed, thereby allowing the connecting assembly 10 and the cylinder assembly 20 to have the inertia of movement away from the injector to be disassembled, and utilizing the inertia to achieve the pulling and disassembly of the injector to be disassembled; by arranging the elastic member 40 to drive the magnetic piston 30 to move toward the connecting assembly 10, utilizing the elastic force of the elastic member 40, both the reliable reset of the magnetic piston 30 is achieved, and the magnetic piston 30 is avoided from directly hitting the bottom wall of the upper cavity of the air flow chamber 21, thereby effectively protecting the magnetic piston 30 and the cylinder assembly 20; the pneumatic engine proposed by the utility model Compared with the existing method of forcibly prying out the injector by manually operating simple tools such as crowbars and hammers, the engine injector puller of the utility model not only has high disassembly efficiency, but also avoids damage such as scratches and deformation to the injector itself and surrounding components, thereby reducing the adverse effects on the subsequent installation and use of the injector and other structures; in addition, for injectors with precise internal design, the utility model also protects the precise structures such as the sealing structure inside the injector during the pulling and disassembly process, thereby avoiding safety hazards such as fuel leakage; the pneumatic engine injector puller proposed by the utility model adopts the pneumatic drive principle and is driven by high-pressure gas to achieve smooth, rapid and non-destructive pulling and disassembly of the injector. The utility model has a simple structure and low cost, is easy to assemble, operate and subsequently maintain, can effectively reduce the labor intensity of the operator, and is suitable for large-scale promotion and use.

[0032] Specifically, the pneumatic engine injector puller further includes a filter, which is disposed at the first flow port 22 and is used to filter the gas entering the air flow cavity 21 .

[0033] By setting a filter to filter the air, impurities and particulate matter in the air can be effectively filtered out, thereby ensuring the service life of the pneumatic engine injector puller and ensuring long-term stable operation.

[0034] like Figure 1 As shown, the cylinder assembly 20 includes a cylinder body 24 and a top cover 25. The interior of the cylinder body 24 is an airflow chamber 21. The top cover 25 is detachably arranged at one end of the cylinder body 24 away from the connecting assembly 10 and is sealed with the cylinder body 24 to close the airflow chamber 21; wherein, the second flow port 23 can be opened and closed on the top cover 25.

[0035] By providing the cylinder body 24 and the top cover 25 , the reliable operation of the cylinder assembly 20 is ensured, and the structure of the cylinder assembly 20 is simplified, which is convenient for assembly and subsequent maintenance.

[0036] like Figure 1 As shown, the top cover 25 is detachably mounted on the cylinder body 24 by a plurality of bolts; the cylinder assembly 20 further includes a one-way air outlet valve 26, which is disposed at the second flow port 23 for controlling the opening and closing of the second flow port 23; wherein, after the pressure in the air flow chamber 21 is greater than a set value, the one-way air outlet valve 26 opens to allow the gas in the air flow chamber 21 to be discharged from the second flow port 23 in one direction.

[0037] By setting a one-way air outlet valve 26, the gas in the upper chamber can only flow out in one direction. In this way, when the magnetic piston 30 moves toward the lower chamber, the volume of the upper chamber becomes larger, and external gas cannot enter the upper chamber through the second flow port 23. The force generated by the air pressure change is opposite to the movement direction of the magnetic piston 30 at this time, which suppresses the movement of the magnetic piston 30, thereby avoiding the magnetic piston 30 from violently impacting the bottom wall of the lower chamber, effectively protecting the lower chamber and the magnetic piston 30.

[0038] like Figure 1 As shown, the connecting assembly 10 includes a connecting rod 11 and a connecting seat 12. The connecting seat 12 is detachably connected to the cylinder assembly 20. One end of the connecting rod 11 is detachably connected to the connecting seat 12 by threaded fitting, and the other end is detachably connected to the injector to be disassembled by threaded fitting.

[0039] This arrangement makes it easier to replace the connecting rod 11 and connect it to the injector to be disassembled. Subsequently, by flexibly setting a variety of connecting rods 11 to correspond to a variety of injectors to be disassembled, when disassembling, the corresponding connecting rod 11 can be selected according to the model and type of the injector to be disassembled. After the two ends of the connecting rod 11 are respectively connected to the connecting seat 12 and the injector to be disassembled, the pulling process can be carried out, which is convenient and fast and easy for the staff to operate.

[0040] In a specific embodiment of the present invention, the connecting rod 11 is made of high-strength stainless steel and undergoes precision machining and heat treatment processes to ensure good mechanical properties and corrosion resistance. The design of the connecting rod 11 also needs to consider the accuracy and strength requirements of the thread. By adopting special thread machining technology and tightening torque control methods, a stable connection between the connecting rod 11 and the injector and reliable transmission of force are ensured.

[0041] Optionally, the end of the magnetic piston 30 facing the connecting assembly 10 is made of neodymium iron boron magnet material; the magnetic piston 30 has a wear-resistant coating on its circumference to reduce the wear of the magnetic piston 30; and / or, the cylinder assembly 20 is made of aluminum alloy material, and the inner wall of the air flow chamber 21 has a wear-resistant coating to reduce the wear of the inner wall of the air flow chamber 21; and / or, the elastic member 40 is an alloy steel spring.

[0042] By setting the magnetic piston to adopt high-performance neodymium iron boron magnet material, a more precise magnetic circuit design is ensured on the magnetic piston 30, ensuring strong magnetic force and stable magnetic field distribution; by setting a wear-resistant coating, wear resistance and corrosion resistance are improved, and the service life of the magnetic piston 30 is extended; by setting the cylinder assembly 20 to adopt aluminum alloy material, precision casting and machining of the cylinder assembly 20 are facilitated, ensuring that the accuracy of its inner hole size and surface roughness meet the requirements; by setting a wear-resistant coating on the inner wall of the air flow chamber 21, wear resistance and sealing are improved. In addition, stability and reliability under long-term use are also ensured.

[0043] By setting the elastic part 40 to an alloy steel spring, it is ensured that it has high rebound force and long-term working stability, and the load characteristics and fatigue life of the elastic part 40 are guaranteed to meet actual use requirements, so that it can still maintain good rebound performance and shape stability after multiple uses.

[0044] Optionally, the pneumatic engine injector puller further includes a handle, which is fixedly disposed on the outside of the cylinder assembly 20 for a worker to hold; and / or, the pneumatic engine injector puller further includes at least one heat dissipation rib, which is disposed on the cylinder assembly 20 for exchanging heat with external air to cool the cylinder assembly 20.

[0045] By providing at least one heat dissipation rib, the cylinder assembly 20 can dissipate heat reasonably and effectively prevent overheating due to long-term use.

[0046] Specifically, the second flow opening 23 and / or the first flow opening 22 adopts a streamlined design; the connection between the inner wall of the second flow opening 23 and the upper cavity and / or the connection between the inner wall of the first flow opening 22 and the lower cavity are rounded.

[0047] This arrangement enables the second flow opening 23 and / or the first flow opening 22 to circulate gas quickly and smoothly, reduces air flow resistance, ensures the balance of air pressure during the drawing process, and at the same time, reduces the generation of noise.

[0048] like Figure 1 As shown, the pneumatic engine injector puller also includes a sealing ring 50, which is sleeved on the outer periphery of the magnetic piston 30 and slidingly sealed with the inner wall of the air flow chamber 21 to isolate the upper chamber from the lower chamber; wherein the sealing ring 50 is an O-ring and is made of fluororubber material.

[0049] By setting the O-ring to be made of high-quality fluororubber material, the sealing ring 50 has excellent properties such as high temperature resistance, oil resistance, and chemical corrosion resistance, thereby ensuring good sealing performance and long-term stability.

[0050] Specifically, the pneumatic engine injector puller also includes an air source and a switch valve. The air source is connected to the first flow port 22 through a pipeline, and is used to deliver gas of a set pressure into the air flow chamber 21; the switch valve is arranged at the first flow port 22, and is used to control the opening and closing of the first flow port 22.

[0051] By arranging the air source and the switch valve to work in coordination, the rapidity and reliability of air intake and exhaust of the first flow port 22 are ensured, thereby improving the pulling efficiency of the pneumatic engine injector puller.

[0052] The specific working process and principle of an embodiment of the present invention are now described in detail as follows:

[0053] like Figures 2 to 5 The process shown is a complete working process;

[0054] like Figure 2 As shown, the pneumatic engine injector puller is in its initial state. At this time, the magnetic piston 30 is attracted to the bottom wall of the lower cavity of the airflow cavity 21 by a strong magnetic force, the elastic member 40 is in a relatively relaxed state, and the connecting rod 11 is threadedly connected to the injector.

[0055] like Figure 3 As shown, compressed air enters the lower chamber of the air flow chamber 21 through the first flow port 22, and the pressure in the lower chamber increases. When the air pressure is greater than the magnetic force and the elastic force, the magnetic piston 30 will quickly break away from the bottom wall of the lower chamber and move away from the injector to be pulled;

[0056] like Figure 4 As shown, the inertia of the magnetic piston 30 impacts the bottom wall of the upper chamber through the elastic member 40, and transmits the impact to the top cover 25 with a larger mass. Under the huge inertia, the cylinder assembly 20 and the connecting assembly 10 move away from the injector to be pulled out, and then the injector to be pulled out, which is connected to the connecting rod 11, is pulled out. During this process, the air in the upper chamber and the top cover 25 can flow out from the second flow port 23.

[0057] like Figure 5 As shown, the elastic force of the elastic member 40 drives the magnetic piston 30 to move toward the bottom wall of the lower cavity, so that the magnetic piston 30 is adsorbed on the bottom wall of the lower cavity again by magnetic force, and resets to the initial standby state, waiting for the next pull of the injector.

[0058] Therefore, it should be noted that: although the initial investment of the pneumatic engine injector puller proposed by the utility model is slightly higher than that of traditional simple tools such as crowbars and hammers, after actual long-term use, the overall cost is more economical because the damage to components such as injectors is reduced and work efficiency is improved; the pneumatic engine injector puller proposed by the utility model not only solves many problems existing in existing injector removal tools, but also provides strong support for achieving efficient, safe and convenient maintenance of engines, and has great practical significance and broad market application prospects.

[0059] In summary, the present invention provides a pneumatic engine injector puller, which cooperates with the connection assembly 10, the cylinder assembly 20, the magnetic piston 30 and the elastic member 40 to make the magnetic piston 30 separate from the bottom wall of the connection assembly 10 after the air flow in the lower cavity of the air flow chamber 21 pushes the magnetic piston 30, and the magnetic force on the magnetic piston 30 will decrease rapidly, thereby making the magnetic piston 30 able to impact the bottom wall of the upper cavity of the air flow chamber 21 at high speed, thereby making the connection assembly 10 and the cylinder assembly 20 have the inertia of movement away from the injector to be disassembled, and utilizing the inertia to achieve the pulling and disassembly of the injector to be disassembled; by arranging the elastic member 40 to drive the magnetic piston 30 to move toward the connection assembly 10, utilizing the elastic force of the elastic member 40, both the reliable reset of the magnetic piston 30 is achieved, and the magnetic piston 30 is avoided from directly hitting the bottom wall of the upper cavity of the air flow chamber 21, thereby effectively protecting the magnetic piston 30 and the cylinder assembly 20. ; Compared with the existing method of relying on manual operation of simple tools such as crowbars and hammers to forcibly pry out the injector, the pneumatic engine injector puller proposed in the utility model not only has high disassembly efficiency, but also avoids damage such as scratches and deformation to the injector itself and surrounding components, thereby reducing the adverse effects on the subsequent installation and use of structures such as the injector; in addition, for injectors with precise internal design, the utility model also protects precise structures such as the sealing structure inside the injector during the pulling and disassembly process, thereby avoiding safety hazards such as fuel leakage; the pneumatic engine injector puller proposed in the utility model adopts the pneumatic drive principle and is driven by high-pressure gas to achieve smooth, rapid and non-destructive pulling and disassembly of the injector. The utility model has a simple structure and low cost, is easy to assemble, operate and subsequently maintain, can effectively reduce the labor intensity of operators, and is suitable for large-scale promotion and use.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0062] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0065] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A pneumatic engine injector puller, characterized in that: include: A connecting assembly (10), a cylinder assembly (20), a magnetic piston (30), and an elastic member (40); one end of the connecting assembly (10) is detachably connected to the injector to be disassembled, and the other end is connected to the cylinder assembly (20); an air flow chamber (21) is provided inside the cylinder assembly (20), and the magnetic piston (30) is slidably arranged in the air flow chamber (21) and is sealed and limited with the inner wall of the air flow chamber (21) to separate the air flow chamber (21) into an upper chamber and a lower chamber; the cylinder assembly (20) has a first flow port (22) at one end close to the connecting assembly (10) and a second flow port (23) at one end away from the connecting assembly (10), the first flow port (22) can be connected to the lower chamber in an on-off manner, and the second flow port (23) can be connected to the upper chamber in an on-off manner; the elastic member (40) is provided in the air flow chamber (21), and its two ends are respectively connected to the magnetic piston (30) and the upper chamber The bottom wall of the lower chamber is abutted against the bottom wall of the lower chamber, and the elastic member (40) is used to provide an elastic force for driving the magnetic piston (30) to move toward the connecting assembly (10); the magnetic piston (30) is detachably adsorbed on the bottom wall of the lower chamber by magnetic force; wherein, when the pneumatic engine injector puller is in a state of pulling the injector to be disassembled, external gas enters the lower chamber from the first flow port (22) at a set pressure, pushing the magnetic piston (30) to overcome the magnetic force and the elastic force of the elastic member (40) to move toward the upper chamber, so that the connecting assembly (10) pulls the injector to be disassembled, and the second flow port (23) is opened to reduce the pressure in the upper chamber; when the pneumatic engine injector puller is in a reset state, the first flow port (22) is opened to exhaust gas, so that the pressure in the lower chamber is reduced, and the elastic member (40) pushes the magnetic piston (30) to reset, and the magnetic piston (30) is adsorbed and fixed to the bottom wall of the lower chamber.

2. The pneumatic engine injector puller according to claim 1, characterized in that: The pneumatic engine injector puller further comprises a filter, which is arranged at the first flow port (22) and is used for filtering the gas entering the air flow cavity (21).

3. The pneumatic engine injector puller according to claim 1, characterized in that: The cylinder assembly (20) comprises a cylinder body (24) and a top cover (25), wherein the interior of the cylinder body (24) is the airflow chamber (21), and the top cover (25) is detachably arranged at one end of the cylinder body (24) away from the connecting assembly (10), and is sealed with the cylinder body (24) to close the airflow chamber (21); wherein the second flow port (23) is openably and closably arranged on the top cover (25).

4. The pneumatic engine injector puller according to claim 3, characterized in that: The top cover (25) is detachably mounted on the cylinder body (24) by means of a plurality of bolts; the cylinder assembly (20) further comprises a one-way air outlet valve (26), which is arranged at the second flow port (23) and is used to control the opening and closing of the second flow port (23); wherein, when the pressure in the air flow chamber (21) is greater than a set value, the one-way air outlet valve (26) opens to allow the gas in the air flow chamber (21) to be discharged from the second flow port (23) in a one-way manner.

5. The pneumatic engine injector puller according to claim 1, characterized in that: The connecting assembly (10) comprises a connecting rod (11) and a connecting seat (12), wherein the connecting seat (12) is detachably connected to the cylinder assembly (20), one end of the connecting rod (11) is detachably connected to the connecting seat (12) by means of a threaded fit, and the other end is detachably connected to the injector to be disassembled by means of a threaded fit.

6. The pneumatic engine injector puller according to claim 1, characterized in that: One end of the magnetic piston (30) facing the connecting assembly (10) is made of a neodymium iron boron magnet material; a wear-resistant coating is provided on the circumference of the magnetic piston (30) to reduce wear of the magnetic piston (30); And / or, the cylinder assembly (20) is made of aluminum alloy material, and the inner wall of the airflow chamber (21) has a wear-resistant coating to reduce wear of the inner wall of the airflow chamber (21); And / or, the elastic member (40) is an alloy steel spring.

7. The pneumatic engine injector puller according to claim 1, characterized in that: The pneumatic engine injector puller further comprises a handle, which is fixedly arranged on the outside of the cylinder assembly (20) for a worker to hold; And / or, the pneumatic engine injector puller further comprises at least one heat dissipation fin, which is arranged on the cylinder assembly (20) and is used for exchanging heat with external air to cool the cylinder assembly (20).

8. The pneumatic engine injector puller according to claim 1, characterized in that: The second circulation port (23) and / or the first circulation port (22) are of streamlined design; the connection between the inner wall of the second circulation port (23) and the upper cavity and / or the connection between the inner wall of the first circulation port (22) and the lower cavity are rounded.

9. The pneumatic engine injector puller according to claim 1, characterized in that: The pneumatic engine injector puller further comprises a sealing ring (50), which is sleeved on the outer periphery of the magnetic piston (30) and slidingly and sealingly cooperates with the inner wall of the airflow cavity (21) to isolate the upper cavity from the lower cavity; wherein the sealing ring (50) is an O-ring and is made of fluororubber material.

10. The pneumatic engine injector puller according to claim 1, wherein: The pneumatic engine injector puller further comprises an air source and a switch valve, wherein the air source is connected to the first flow port (22) through a pipeline and is used to deliver gas of a set pressure into the air flow cavity (21); and the switch valve is arranged at the first flow port (22) and is used to control the opening and closing of the first flow port (22).

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