A fuel injector dismounting tool

Abstract

The application discloses a fuel injector dismounting tool, a fuel injector support, a bottom plug-in plate is arranged at the bottom of the fuel injector support, the bottom plug-in plate is slidably inserted into a sliding mounting seat and is fixed in position, a fuel injector fixing mechanism is arranged on the upper side of the bottom plug-in plate, the fuel injector fixing mechanism comprises a first vertical support plate and a second vertical support plate, and a fuel injector body is fixed on the first vertical support plate and the second vertical support plate; a wrench structure is provided with a sleeve matched with a dismounting part at the end of the fuel injector body, a force arm is arranged on one side of the sleeve, force grooves are symmetrically arranged at the two sides of the end of the force arm, the second end of a hydraulic cylinder is a force applying end, the force applying end is clamped into the force grooves to push the wrench structure to rotate. The fuel injector support can be dismounted and replaced, a plurality of fuel injector supports can be arranged to fix the fuel injector body in advance, and therefore the dismounting efficiency of a large number of fuel injectors can be effectively improved. A plurality of variable-diameter sleeves are arranged in the through hole, and the diameter of the through hole can be quickly changed.

Description

Technical Field

[0001] This invention relates to the field of diesel engine injector technology, specifically to an injector disassembly and assembly tool. Background Technology

[0002] Fuel injectors are precision components with extremely high machining accuracy. In large oil rigs, injectors receive injection pulse signals from the ECU (Engine Control Unit) and precisely control the amount of fuel injected into the cylinder. The spray characteristics of injectors include atomization particle size, fuel mist distribution, fuel jet direction, range, and diffusion cone angle. These characteristics must meet the requirements of the diesel engine combustion system to ensure optimal air-fuel mixture formation and combustion, resulting in high power and thermal efficiency.

[0003] The fuel injector should be checked and adjusted approximately every 700 hours of operation. If the opening pressure is more than 1 MPa lower than the specified value or if there is severe carbon buildup on the needle valve head, the fuel injector needs to be disassembled and cleaned. After disassembly, the removed needle valve should be placed in clean diesel fuel and the carbon buildup scraped off with a wooden stick. The nozzle should be cleared with a thin steel wire to ensure normal operation of the fuel injector. After cleaning, the injector should be reassembled and tested.

[0004] Currently, the disassembly and installation of injectors for some large diesel engines are performed using a bench vise. During disassembly, a large hammer is used to strike a wrench to loosen the injector nozzle clamping nut. For example, an injector disassembly and assembly fixture disclosed in application number CN201320009087.X requires the fixture to be clamped in the injector clamping flat position before being tightened with a bench vise.

[0005] Its drawbacks are that the tightening torque of the injector nozzle clamping nut is relatively high, and after long-term use, the injector is often difficult to loosen due to high temperature and carbon buildup. Furthermore, using a large hammer during disassembly frequently damages the vise and poses a safety hazard due to falling objects.

[0006] Furthermore, the traditional method of using a bench vise for clamping requires multiple clamping operations when the injector needs to be disassembled at both ends. Multiple clamping operations inevitably increase the labor intensity of the operator. Moreover, the injector has a high precision, and re-clamping can easily cause wear on the injector, thereby reducing assembly accuracy and making disassembly and assembly inefficient.

[0007] In view of the above, it is necessary to propose a fuel injector disassembly and assembly tool to solve the above problems. Summary of the Invention

[0008] The purpose of this invention is to solve the above-mentioned technical problems by providing a fuel injector disassembly and assembly tool.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: an injector disassembly and assembly fixture, comprising a fixture base structure, which includes a base plate, a hydraulic cylinder, and a sliding mounting seat. A vertical plate is fixedly mounted on the upper surface of the base plate, and a pin is fixedly mounted on the front side of the vertical plate. The first end of the hydraulic cylinder is hinged to the pin, and a sliding mounting seat is provided on one side of the vertical plate.

[0010] The injector bracket has a bottom plate at its bottom. The bottom plate is slidably inserted into the sliding mounting seat and fixed in position. An injector fixing mechanism is provided on the upper side of the bottom plate. The injector fixing mechanism includes a first upright plate and a second upright plate. The injector body is fixed on the first upright plate and the second upright plate.

[0011] The wrench structure has a sleeve that mates with the disassembly part at the end of the injector body. A lever arm extends from one side of the sleeve, and force grooves are symmetrically provided on both sides of the end of the lever arm. The second end of the hydraulic cylinder is the force-applying end, which engages in the force groove to drive the wrench structure to rotate.

[0012] Furthermore, both the first and second support plates are provided with through holes, the diameter of which is the same as that of the cylindrical outer wall of the injector body, and the two through holes are coaxially arranged. A rib plate is also connected between the first and second support plates, and the bottom surface of the rib plate is in contact with the bottom insert plate. The second support plate is provided with anti-torsion screws that match the screw holes of the mounting plate at the end of the injector body.

[0013] Furthermore, the sliding mounting base is composed of two L-shaped steel plates. The openings of the two L-shaped steel plates are arranged opposite each other and welded to the base plate, so that a track for the bottom insert plate to be inserted is formed between the two L-shaped steel plates and the base plate. The second upright plate is symmetrically provided with notches on both sides of the end connected to the bottom insert plate to avoid the edge of the track. The first upright plate is provided with a blocking part at the corresponding position of the notch. When the injector bracket is inserted into the sliding mounting base, the blocking part abuts against the end of the track to achieve the limit.

[0014] Furthermore, multiple variable diameter collars are sequentially fitted inside the through circular hole, and the number of variable diameter collars can be increased or decreased to adapt to different outer diameters of the injector body.

[0015] Furthermore, the first and second upright plates are both vertically fixed on the rotating plate, and an upper sliding plate is fixed on the upper side of the bottom insert plate. The center of the rotating plate is rotatably connected to the upper sliding plate through a rotating shaft, and a positioning screw passes through the rotating plate and the upper sliding plate.

[0016] Furthermore, the first and second support plates have the same shape, and the first and second support plates are in the shape of a portal frame. The upper part of the portal frame is a circular arc beam, and the portal frame is provided with a clamping mechanism that clamps and fixes the injector body from multiple angles.

[0017] Furthermore, the clamping mechanism includes a side clamping part that can rotate and move on the arc beam, and a bottom clamping part fixedly disposed on the rotating plate. Both the side clamping part and the bottom clamping part are provided with adaptive chucks. The arc beam is provided with an arc rail inside. The side clamping part includes an arc slider and an adjusting screw. The arc slider is slidably connected and placed inside the arc rail. The adjusting screw is screwed through the arc slider. When the side clamping part rotates along the arc rail, the extension line of the adjusting screw passes through the center of the arc beam. The end of the adjusting screw is rotatably connected to the adaptive chuck.

[0018] Furthermore, the adaptive chuck includes a chuck seat and a clip. The clip is a semi-cylindrical structure. The chuck seat has two cylindrical grooves. The cylindrical side of the clip is placed in the cylindrical groove. When clamping, the clip rotates along its axis in the cylindrical groove by the squeezing of the chuck seat and the outer wall of the injector to adapt to the outer wall of the injector of different sizes.

[0019] Furthermore, clamping plates are slidably connected to both sides of the rotating plate, and the clamping plates clamp and fix the clamping flat positions on both sides of the injector body.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. This device is equipped with a detachable and replaceable injector bracket. By setting multiple injector brackets, the injector body can be fixed in advance, thereby effectively improving the disassembly efficiency of a large number of injectors.

[0022] 2. The injector bracket in this invention can quickly change the diameter of the through hole by setting multiple variable diameter collars in the through hole, thereby facilitating the fixing of injectors of different sizes.

[0023] 3. Through improvements, a gantry-shaped upright plate is set, and an adaptive clamp is installed on it to firmly clamp the injector from multiple directions. It can also automatically adapt to the fixing of injectors of different sizes, thus improving the fixing efficiency.

[0024] 4. By setting a rotating plate, the injector body can be disassembled and assembled at both ends in one clamping operation, which not only reduces the number of clamping operations but also improves work efficiency. Attached Figure Description

[0025] Figure 1 This is one of the isometric views of an injector assembly / disassembly fixture according to the present invention;

[0026] Figure 2 An exploded view of the shaft of an injector disassembly and assembly fixture according to the present invention;

[0027] Figure 3 This is a structural diagram of the injector bracket in the second embodiment of the present invention;

[0028] Figure 4 This is the second isometric view of an injector disassembly and assembly fixture according to the present invention;

[0029] Figure 5 This is an exploded view of the injector bracket in the third embodiment of the present invention.

[0030] In the diagram: 1. Base plate; 2. Hydraulic cylinder; 3. Sliding mounting seat; 4. Vertical plate; 5. Injector bracket; 6. Bottom insert plate; 7. First vertical plate; 8. Second vertical plate; 9. Injector body; 10. Wrench structure; 11. Sleeve; 12. Lever arm; 13. Force groove; 14. Force application end; 15. Through hole; 16. Rib plate; 17. Anti-torsion screw; 18. Notch; 19. Clamping part; 20. Variable diameter collar; 21. Rotating plate; 22. Upper sliding plate; 23. Positioning screw; 24. Arc beam; 25. Adaptive chuck; 26. Arc rail; 27. Adjusting screw; 28. Chuck seat; 29. ​​Clamping flap; 30. Clamping plate. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0032] Example 1:

[0033] A fuel injector disassembly and assembly fixture includes a fixture base structure, which comprises a base plate 1, a hydraulic cylinder 2, and a sliding mounting seat 3. A vertical plate 4 is fixedly mounted on the upper surface of the base plate 1, and a pin is fixedly mounted on the front side of the vertical plate 4. The first end of the hydraulic cylinder is hinged to the pin. A sliding mounting seat 3 is provided on one side of the vertical plate 4. In actual use, the hydraulic cylinder 2 is made using a 5T hydraulic jack, and a pneumatic hydraulic pump is used as the hydraulic supply device for the hydraulic cylinder 2 in the fixture.

[0034] like Figure 1 , Figure 2 As shown, the injector body 9 has a cylindrical outer wall section, which is fixed by the injector bracket 5. Then, the end structure is disassembled using a hydraulic cylinder 2 and a wrench structure 10, thus eliminating the danger of using a large hammer for disassembly in existing technologies. The bottom of the injector bracket 5 is provided with a bottom insert plate 6, which slides into the sliding mounting base 3 and is fixed in position. Figure 2As shown, the sliding mounting base 3 is composed of two L-shaped steel plates. The openings of the two L-shaped steel plates are arranged opposite each other and welded to the base plate 1, so that the L-shaped steel plates on both sides and the base plate 1 form a track for the bottom insert plate 6 to be inserted. It is set to a sliding insertion and fixing form, which can facilitate the combination of the injector bracket 5 and the tooling base structure. Multiple injector brackets 5 can also be set to be installed alternately on the tooling base, which can improve the efficiency of injector disassembly and assembly. Multiple injectors and injectors of different sizes can be disassembled and assembled using the same tooling base structure.

[0035] Furthermore, an injector fixing mechanism is provided on the upper side of the bottom plate 6. The injector fixing mechanism includes a first support plate 7 and a second support plate 8, on which the injector body 9 is fixed. In this embodiment, both the first support plate 7 and the second support plate 8 are provided with through holes 15. The diameter of the through holes 15 is the same as that of the cylindrical outer wall of the injector body 9, and the two through holes 15 are coaxially arranged, which facilitates the disassembly of the injector through the through holes. The injector body 9 is fixed by two through holes 15. Since two support plates are used, two parts of the injector body 9 are fixed through two through-holes 15. This effectively prevents the injector from shaking and maintains its stability in the axial direction when disassembling it using the hydraulic cylinder 2. Secondly, to prevent rotation of the injector during disassembly using the hydraulic cylinder 2, anti-torsion screws 17 are provided on the second support plate 8, which mate with the screw holes on the end mounting plate of the injector body 9. Figure 2 As shown, the injector has a disc-shaped mounting plate at its tail end. The mounting plate has screw holes around its perimeter, forming a flange-like structure. The anti-torsion screws 17 on the second support plate 8 correspond to the screw holes. Passing the anti-torsion screws 17 through the screw holes securely fixes the injector body 9 to the injector bracket 5 and effectively prevents rotation. Therefore, the force-applying end 14 of the hydraulic cylinder 2 can apply the rotational torque to the part that needs to be disassembled. To improve the strength of the two support plates and prevent tilting, a rib plate 16 is also connected between the first support plate 7 and the second support plate 8. The bottom surface of the rib plate 16 is in contact with the bottom insert plate 6.

[0036] like Figure 2 , Figure 3As shown, the second upright plate 8 and the bottom insert plate 6 are symmetrically provided with notches 18 on both sides to avoid the edge of the track. The first upright plate 7 is provided with a locking part 19 at the corresponding position of the notch 18. When the injector bracket 5 is inserted into the sliding mounting seat 3, the locking part 19 abuts against the end of the track to achieve a limit. When the bottom insert plate 6 of the injector bracket 5 is inserted into the sliding mounting seat 3, the second upright plate 8 enters the track first. The notches 18 on both sides of the second upright plate 8 can allow the second upright plate 8 to enter the track smoothly. At the end of the stroke of the injector bracket 5, the position of the second upright plate 8 corresponding to the notch 18 is the locking part 19, which limits the injector bracket 5 and prevents it from sliding further. In actual use, screws can also be set on the track. When the bottom insert plate 6 is inserted, the screws are screwed in to squeeze the bottom insert plate 6 from the top to prevent it from moving.

[0037] The wrench structure 10 has a sleeve 11 that mates with the disassembly portion at the end of the injector body 9. A lever arm 12 extends from one side of the sleeve 11, and symmetrical force grooves 13 are provided on both sides of the end of the lever arm 12. The second end of the hydraulic cylinder is the force-applying end 14, which engages with the force grooves 13 to rotate the wrench structure 10. Similar to the existing striking wrench structure 10, this wrench structure 10 has a box-shaped sleeve 11. The difference lies in the design: the lever arm 12 of a typical striking wrench is essentially flat on one side, while this design… The lever arm 12 has a concave force-applying groove on its side. When the force-applying end 14 is inserted into the force-applying groove and a squeezing force is applied to it, the position of the force-applying end 14 needs to move as the lever arm 12 rotates. The force-applying groove can guide the movement of the force-applying end 14, thereby causing the hydraulic cylinder 2 to rotate accordingly. In use, the sleeve 11 is fitted onto the nut at the end of the injector, and then the force-applying end 14 of the hydraulic cylinder 2 is pressed against the force-applying groove 13. The pressure provided by the hydraulic cylinder 2 can be used to disassemble or install the injector body 9.

[0038] Example 2:

[0039] In the above embodiment, the diameter of the through hole 15 is fixed, thus allowing the injector bracket 5 to be fixed only for one type of injector. This embodiment improves this by sequentially fitting multiple variable-diameter collars 20 inside the through hole 15, such as... Figure 3 As shown, the number of variable diameter sleeves 20 can be increased or decreased to accommodate different outer diameters of the injector body 9. It is understood that the positions of adjacent variable diameter sleeves 11 need to be fixed. Specifically, threaded holes can be opened at corresponding positions on the side wall of the variable diameter sleeve 20. A positioning screw is screwed into the threaded hole and connected to the through hole 15. It is understood that the threaded hole on the inner wall of the variable diameter sleeve 20 should be countersunk to prevent the screw from being exposed.

[0040] Example 3:

[0041] This embodiment presents another structural design for the injector bracket 5. In the previous embodiment, the injector body 9 was fixed in the injector bracket 5, thus fixing its position. This required multiple clamping operations to disassemble the other end of the injector body 9, undoubtedly increasing the number of steps. This embodiment further improves upon this design. Specifically, the first support plate 7 and the second support plate 8 are both vertically fixed on the rotating plate 21. An upper sliding plate 22 is fixed to the upper side of the bottom insert plate 6. The center of the rotating plate 21 is rotatably connected to the upper sliding plate 22 via a rotating shaft. By adjusting the rotation of the rotating plate 21, the injector body 9 fixed on the two support plates can be flipped, greatly reducing the tedious operation of repeatedly clamping and fixing the injector. This reduces the need for clamping... The number of times the injector is reduced is greatly reduced, thus significantly lowering the risk of damage and improving work efficiency. A positioning screw 23 is provided through the rotating plate 21 and the upper slide plate 22. When the positioning screw 23 on the rotating plate 21 is inserted into the upper slide plate 22, the rotating plate 21 and the upper slide plate 22 can be fixed together, preventing the rotating plate 21 from rotating. At this time, the injector can be removed using the hydraulic cylinder 2. After one end is removed, the positioning screw 23 is loosened, causing the rotating plate 21 to rotate 180°. At this time, the other end of the injector is close to the hydraulic cylinder 2. Then, the positioning screw 23 is screwed in again to fix the rotating plate 21 onto the upper slide plate 22. The other end of the injector is removed using the hydraulic cylinder 2 in the same way. This reduces the need for repeated clamping operations on the injector.

[0042] The first support plate 7 and the second support plate 8 are identical in shape and are gantry-shaped. The upper part of the gantry is a circular arc beam 24, and the gantry is equipped with a clamping mechanism that clamps and fixes the injector body 9 from multiple angles. Specifically, as shown... Figure 4 , Figure 5As shown, the clamping mechanism includes a side clamping part that can rotate and move on the arc beam 24, and a bottom clamping part fixedly mounted on the rotating plate 21. Both the side clamping part and the bottom clamping part are equipped with adaptive chucks 25. The rotational movement position is the movement of the side clamping part in the extension direction of the arc beam 24. The side clamping part includes an arc slider and an adjusting screw 27. The arc beam 24 is provided with an arc rail 26 inside. The arc slider is slidably connected and placed inside the arc rail 26. The adjusting screw 27 is screwed through the arc slider, and when the side clamping part rotates along the arc rail 26, the extension line of the adjusting screw 27 always passes through the center of the arc beam 24. The end of the adjusting screw 27 is rotatably connected to the adaptive chuck 25. In actual use, the rotation adjustment... The adjusting screw 27 allows the adaptive chuck 25 at the end of the adjusting screw 27 to move closer to or further away from the center of the arc beam 24, as shown in the figure. The figure shows two side clamping parts and one bottom clamping part, which can clamp and fix the injector body 9 from three directions. Since the position of the adaptive chuck 25 of the side clamping parts is adjustable, it can be used to adapt to injectors of different sizes. It can be understood that in actual use, the arc slider can also be designed with a structure with a central pivot, that is, the pivot is screwed to the adjusting screw 27 to form a cross-head-like connection structure, so that the adjusting screw 27 can not only be pushed forward by screw rotation, but also rotated by the pivot, so that the adjusting screw 27 can rotate an angle in the plane where the arc beam 24 is located.

[0043] Since the injector body 9 is disassembled and assembled at both ends, this embodiment improves the method by clamping the middle part of the injector to prevent it from rotating. Specifically, clamping plates 30 are slidably connected to both sides of the rotating plate 21. The clamping plates 30 clamp and fix the clamping flat parts on both sides of the injector body 9. The clamping plates 30 on both sides clamping the clamping flat parts can effectively prevent the injector from rotating. Moreover, as Figure 4 , Figure 5 As shown, the movement of the clamping plate 30 can be achieved using the principle of a linear motor, with the rotation of the screw controlling the movement of the clamping plate 30 within the track on the rotating plate 21.

[0044] The adaptive chuck 25 includes a chuck base 28 and a retaining flap 29. The retaining flap 29 has a semi-cylindrical structure. The chuck base 28 has two cylindrical grooves. The cylindrical side of the retaining flap 29 is placed in the cylindrical groove. When clamping, the retaining flap 29 rotates along its axis in the cylindrical groove by the compression between the chuck base 28 and the outer wall of the injector to adapt to the outer wall of the injector of different sizes. Since it needs to adapt to the injector body 9 with different gear sizes, this adaptive chuck 25 can make the retaining flap 29 rotate under pressure to adapt to the shape of the outer wall of the injector when it is pressed against the outer wall of the injector. Therefore, this embodiment can be applied to the fixing of irregular outer wall shapes of injectors in actual use.

[0045] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An oil injector dismounting tool, characterized in that, The utility model provides a tooling base structure, it includes pad base plate (1), hydraulic oil cylinder (2), sliding mounting base (3) group, the vertical fixed surface of pad base plate (1) upper end is equipped with riser (4), and the front side of riser (4) is fixedly equipped with pin shaft, and the first end of hydraulic oil cylinder (2) is hingedly arranged on pin shaft, and the one side of riser (4) is provided with sliding mounting base (3), Oil sprayer support (5) bottom is equipped with bottom plug-in board (6), and bottom plug-in board (6) is slidably inserted into sliding mounting base (3) and is fixed in position, and the upper side of bottom plug-in board (6) is provided with oil sprayer fixing mechanism, and the oil sprayer fixing mechanism includes first riser plate (7), second riser plate (8), and the oil sprayer body (9) is fixed on first riser plate (7) and second riser plate (8), Wrench structure (10) has sleeve (11) matched with the end disassembly part of oil sprayer body (9), and force arm (12) is extended on one side of sleeve (11), and force arm (12) is symmetrically provided with force groove (13) on both sides of the end, and the second end of hydraulic oil cylinder (2) is force end (14), and the force end (14) is inserted into force groove (13) and pushes wrench structure (10) to rotate, Sliding mounting base (3) is composed of two L-shaped steel plates, and the openings of the two L-shaped steel plates are oppositely arranged and welded and fixed on the pad base plate (1), so that the track for inserting the bottom plug-in board (6) is formed between the two L-shaped steel plates and the pad base plate (1), the two sides of the end connected with the bottom plug-in board (6) are symmetrically provided with notches (18) for avoiding the edge of the track, and the first riser plate (7) is provided with a clamping portion (19) at the position corresponding to the notches (18), and when the oil sprayer support (5) is inserted into the sliding mounting base (3), the clamping portion (19) is abutted against the end of the track to limit the position.

2. The fuel injector dismounting tool according to claim 1, characterized in that Through holes (15) are formed in the first riser plate (7) and the second riser plate (8), the through holes (15) have the same diameter as the outer wall of the cylindrical oil sprayer body (9), and the two through holes (15) are coaxially arranged, and a rib plate (16) is further connected between the first riser plate (7) and the second riser plate (8), and the bottom surface of the rib plate (16) is attached to the bottom plug-in board (6), and the second riser plate (8) is provided with anti-twist screws (17) matched with the screw hole positions of the end mounting plate of the oil sprayer body (9).

3. The fuel injector dismounting tool according to claim 2, characterized in that A plurality of variable-diameter sleeves (20) are sequentially sleeved in the through holes (15), and the number of the variable-diameter sleeves (20) is increased or decreased to adapt to the outer diameters of different oil sprayer bodies (9).

4. The fuel injector dismounting tool according to claim 1, characterized in that The first riser plate (7) and the second riser plate (8) are vertically fixed on a rotating plate (21), an upper sliding plate (22) is fixed on the upper side of the bottom plug-in board (6), the rotating plate (21) is rotatably connected to the upper sliding plate (22) through a rotating shaft, and a positioning screw (23) passes through the rotating plate (21) and the upper sliding plate (22).

5. The fuel injector dismounting tool according to claim 4, characterized in that The first stand plate (7) and the second stand plate (8) are of the same shape and are in the shape of a door-shaped frame, the upper part of the door-shaped frame is a circular arc beam (24), and the door-shaped frame is internally provided with a clamping mechanism for clamping and fixing the oil sprayer body (9) from multiple angles.

6. The fuel injector dismounting tool according to claim 5, characterized in that The clamping mechanism comprises a side clamping part capable of rotating and moving positions on the circular arc beam (24) and a bottom clamping part fixedly arranged on the rotating plate (21), and the side clamping part and the bottom clamping part are both provided with self-adaptive clamping heads (25); the circular arc beam (24) is internally provided with a circular arc rail (26), and the side clamping part comprises a circular arc slider and an adjusting screw (27); the circular arc slider is slidingly connected in the circular arc rail (26), the adjusting screw (27) is screwed through the circular arc slider, and when the side clamping part rotates along the circular arc rail (26), the extension line of the adjusting screw (27) passes through the center of the circular arc beam (24); and the end part of the adjusting screw (27) is rotatably connected with the self-adaptive clamping head (25).

7. The fuel injector dismounting tool according to claim 6, characterized in that The self-adaptive clamping head (25) comprises a clamping head base (28) and a clamping half (29), the clamping half (29) is in a semi-cylindrical structure, two cylindrical grooves are arranged on the clamping head base (28), the cylindrical side surface of the clamping half (29) is arranged in the cylindrical groove, and when clamping, the clamping half (29) is rotated along the axis in the cylindrical groove to adapt to the outer wall of the oil sprayer through the extrusion of the clamping head base (28) and the outer wall of the oil sprayer.

8. The fuel injector dismounting tool according to claim 7, characterized in that The rotating plate (21) is slidingly connected with clamping plates (30) on both sides, and the clamping plates (30) clamp and fix the clamping flat positions on both sides of the oil sprayer body (9).

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