A polishing device for precision parts of fuel nozzles

Abstract

The invention relates to the field of nozzle polishing, and discloses a polishing device for precision parts of a fuel nozzle, comprising a base plate and a polishing wheel, wherein two first support plates are fastened by bolts at the left edge of the base plate, and two second support plates are fastened by bolts at the right edge of the base plate, a first fixing rod is fixedly passed through the top position between the two first support plates, and a second fixing rod is passed through the top position between the two second support plates, a telescopic structure is provided on the first fixing rod and the second fixing rod, and a clamping structure is provided at one end of the two telescopic structures, and a plurality of polishing wheels are provided on the polishing structure, and the fuel nozzle is polished simultaneously by using a plurality of rotating polishing wheels, thereby improving the polishing work efficiency, and two sets of clamping structures are used to alternately clamp the two ends of the nozzle, so that the nozzle can be thoroughly polished without disassembling the nozzle to adjust the clamping position, and the operation is more labor-saving and convenient.

Description

Technical Field

[0001] The invention relates to the technical field of nozzle polishing, in particular to a polishing device for precision parts of a fuel nozzle. Background Art

[0002] The fuel injector is actually a simple solenoid valve. When the solenoid coil is energized, suction is generated, the needle valve is sucked up, the spray hole is opened, and the fuel is sprayed out at high speed through the annular gap between the needle pin at the head of the needle valve and the spray hole, forming a mist, which is conducive to full combustion. In the past, the fuel injector used in diesel engines was mechanically controlled. The mechanical diesel nozzle works by controlling precision parts. When processing the fuel nozzle, polishing equipment is used to polish the fuel nozzle;

[0003] In the current polishing equipment, the motor is started through the control panel, and the motor drives the polishing wheel to rotate, and the fuel nozzle to be polished is sent to the polishing wheel through the clamping structure for polishing;

[0004] However, the polishing equipment in the prior art generally uses a rotating polishing wheel to polish the nozzle, which reduces the efficiency of the polishing work. In addition, when the nozzle is fixed by clamping, the rotating polishing wheel cannot smoothly polish the clamped position on the nozzle. The nozzle needs to be manually disassembled to readjust the clamping position of the nozzle before continuing polishing, which makes the operation more cumbersome and increases the difficulty of the staff's work. Therefore, there is room for improvement. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a polishing device for precision parts of a fuel nozzle.

[0006] The present invention provides a polishing device for a precision fuel nozzle part, which adopts the following technical solution:

[0007] A polishing device for precision parts of a fuel nozzle comprises a bottom plate and a polishing wheel, two first support plates are fastened by bolts at the left edge of the bottom plate, two second support plates are fastened by bolts at the right edge of the bottom plate, a first fixing rod is fixedly passed through the top position between the two first support plates, a second fixing rod is passed through the top position between the two second support plates, a telescopic structure is arranged on the first fixing rod and the second fixing rod, a clamping structure is arranged at one end of the two telescopic structures, a polishing structure is arranged in the middle of the top of the bottom plate, a collecting structure is arranged below the two second support plates, and a flipping structure is arranged at both ends of the second fixing rod;

[0008] The polishing structure includes an intermediate ring arranged in the middle above the bottom plate, and two connecting rods are connected to the intermediate ring, and the two ends of each connecting rod are respectively connected to the first support plate and the second support plate, and a plurality of inner plates are connected to the inner wall of the intermediate ring, and the plurality of inner plates are distributed at equal angles on the circumference of the intermediate ring, and a slide groove is opened on each of the inner plates, and a slide plate is slidably arranged in the slide groove, and a motor is installed on one side surface of each of the slide plates, and one end of the motor output shaft is connected to a rotating rod that rotates and passes through the slide plate, and a polishing wheel is fixed on the end of the rotating rod that passes through the slide plate.

[0009] Preferably, the telescopic structure includes intermediate blocks which are respectively sleeved on the middle of the first fixed rod and the second fixed rod, and a corresponding intermediate block is fixedly sleeved on the first fixed rod, and the first electric telescopic rod is installed at the lower position of the two intermediate blocks close to each other on one side, one end of the output shaft of the first electric telescopic rod is connected to an L-shaped rod, and one end of the L-shaped rod is connected to a rotating sleeve, and the rotating sleeve is rotatably sleeved on the pushing block, the clamping structure is arranged on one end of the pushing block, a rotating structure is arranged between the other end of the pushing block and the intermediate block, and a driving structure is arranged between the rotating sleeve on the left and the slide plate.

[0010] Preferably, the clamping structure comprises a fixing sleeve mounted on one end of the pushing block, a plurality of second electric telescopic rods are mounted on the outer surface of the fixing sleeve, and a clamping block is mounted on one end of the output shaft of each second electric telescopic rod inserted into the fixing sleeve.

[0011] Preferably, the rotating structure includes a push-pull rod connected to the other end of the pushing block, a fixed tube is movably sleeved on the push-pull rod, one end of the fixed tube is connected to the middle block, a spiral groove is provided on the push-pull rod, an insertion rod is fixedly inserted at one end of the fixed tube away from the middle block, and one end of the insertion rod is slidably set in the spiral groove.

[0012] Preferably, the driving structure includes a plurality of third fixed rods connected to the side surface of the left rotating sleeve, the ends of the plurality of third fixed rods away from the rotating sleeve are connected to the driving ring, and each of the slide plates is connected to a transverse plate on one side surface close to the driving ring, and a first transverse groove is provided on the transverse plate along its length direction, and the driving ring moves through the plurality of first transverse grooves respectively, and a guide groove connected to the first transverse groove is provided on the transverse plate, and the guide groove is in a wave-like shape.

[0013] Preferably, the collecting structure includes a placing plate fixedly installed at the lower part between the two second support plates, and a material receiving frame is provided on the placing plate through a hanging buckle structure. The material receiving frame and the placing plate are both inclined upward in the direction of the middle ring, and a feeding port is opened at the upper end of the material receiving frame, and a handle is installed in the middle of the upper part of the material receiving frame, and a rubber pad is bonded to the inner wall of the material receiving frame.

[0014] Preferably, the hanging buckle structure includes buckle blocks arranged at the front and rear edges of the lower upper end of the material receiving frame, the buckle blocks are in an "L" shape, and a slot is opened at the position of the placement plate corresponding to the buckle block, and the buckle block is buckled in the slot.

[0015] Preferably, the flipping structure includes side plates fixedly mounted on both ends of the second fixed rod, the second fixed rod movably passes through the corresponding middle block, the side plates are provided with second transverse grooves distributed along the transverse direction, and driving rods are movably inserted into the two second transverse grooves, the two driving rods are close to each other and are connected to the rotating sleeve on the right side at one end, and the side plates are provided with an arc groove connected to the right end of the second transverse groove.

[0016] In summary, the present invention includes the following beneficial technical effects:

[0017] 1. The present invention is provided with a polishing structure, two sets of telescopic structures and two sets of clamping structures. A plurality of polishing wheels are provided on the polishing structure. The fuel nozzle is polished by using a plurality of rotating polishing wheels at the same time, thereby improving the polishing efficiency. In addition, the two sets of clamping structures are used to alternately clamp the two ends of the nozzle. In this way, the nozzle can be thoroughly polished without disassembling the nozzle to adjust the clamping position, and the operation is more labor-saving and convenient.

[0018] 2. The present invention provides a driving structure between the left rotating sleeve and the slide plate on which the polishing wheel is provided, so that the telescopic structure drives the nozzle to move and polish, and drives the multiple polishing wheels rotating in the middle ring to move synchronously along its radial direction, and then the position of the polishing wheel can be synchronously adjusted according to the polishing at different outer diameter positions on the nozzle, thereby improving the polishing quality of the nozzle;

[0019] 3. A rotating structure is provided between the push block and the intermediate block of the present invention, so that when the clamping structure drives the nozzle to move, the rotating structure can automatically drive the nozzle to rotate, thereby polishing the nozzle more thoroughly;

[0020] 4. The present invention provides a collecting structure at the second support plate and a flipping structure on the second fixed rod, so that the telescopic structure on the right side drives the nozzle to move after polishing, and then the flipping structure is used to drive the telescopic structure and the clamping structure on the right side to rotate downward as a whole, thereby sending the polished nozzle to the collecting structure. When the nozzle is released, the nozzle can automatically fall into the collecting structure to realize automatic unloading. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a polishing device for a precision fuel nozzle part according to an embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a collection structure in an embodiment of the present invention;

[0023] Figure 3 is a schematic diagram of the structure below the placement plate in an embodiment of the present invention;

[0024] Figure 4 is a schematic diagram of the structure of the middle ring in an embodiment of the present invention;

[0025] Figure 5 In the embodiment of the present invention Figure 4 A magnified view of the structure at A;

[0026] Figure 6 is a schematic structural diagram of the first support plate in an embodiment of the present invention;

[0027] Figure 7 In the embodiment of the present invention Figure 6 A magnified view of the structure at B;

[0028] Figure 8 is a schematic structural diagram of the second support plate in an embodiment of the present invention;

[0029] Fig. 9 Schematic diagram of the structure of the side panel in an embodiment of the present invention.

[0030] Explanation of reference numerals: 1, bottom plate; 2, first support plate; 3, second support plate; 4, middle ring; 5, connecting rod; 6, inner plate; 7, motor; 8, rotating rod; 9, polishing wheel; 10, slide groove; 11, slide plate; 12, first fixed rod; 13, second fixed rod; 14, middle block; 15, first electric telescopic rod; 16, L-shaped rod; 17, pushing block; 18, rotating sleeve; 19, fixed sleeve; 20, second electric Telescopic rod; 21, clamping block; 22, push-pull rod; 23, fixed tube; 24, plug rod; 25, spiral groove; 26, third fixed rod; 27, driving ring; 28, transverse plate; 29, first transverse groove; 30, guide groove; 31, placement plate; 32, material receiving frame; 33, material feed port; 34, handle; 35, buckle block; 36, card slot; 37, driving rod; 38, side plate; 39, second transverse groove; 40, arc groove. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-Figure 9 The present invention is described in further detail.

[0032] The embodiment of the present invention discloses a polishing device for precision parts of a fuel nozzle, comprising a bottom plate 1 and a polishing wheel 9, two first support plates 2 are fastened by bolts at the left edge of the bottom plate 1, two second support plates 3 are fastened by bolts at the right edge of the bottom plate 1, a first fixing rod 12 is fixedly passed through the top position between the two first support plates 2, a second fixing rod 13 is passed through the top position between the two second support plates 3, telescopic structures are provided on the first fixing rod 12 and the second fixing rod 13, a clamping structure is provided at one end of the two telescopic structures, a polishing structure is provided at the middle of the top of the bottom plate 1, a collecting structure is provided at the bottom between the two second support plates 3, and flipping structures are provided at both ends of the second fixing rod 13;

[0033] The polishing structure includes an intermediate ring 4 arranged in the middle above the bottom plate 1, and two connecting rods 5 are connected to the intermediate ring 4. The connecting rods 5 are in a "T" shape. The two ends of each connecting rod 5 are respectively connected to the first support plate 2 and the second support plate 3. The inner wall of the intermediate ring 4 is fixedly connected to a plurality of inner plates 6. The plurality of inner plates 6 are distributed at equal angles on the circumference of the intermediate ring 4. A slide groove 10 is provided on each inner plate 6. A slide plate 11 is slidably arranged in the slide groove 10. The end face of the slide plate 11 is in an "H" shape to prevent the slide plate 11 from falling on the inner plate 6. A motor 7 is installed on one side of each slide plate 11. The motor 7 outputs One end of the shaft is connected to a rotating rod 8 that rotates through a slide plate 11. A polishing wheel 9 is fixed on one end of the rotating rod 8 that passes through the slide plate 11. During polishing, the motors 7 on the multiple slide plates 11 can be directly started to drive the multiple polishing wheels 9 to rotate at the same time. The fuel nozzle is polished using the multiple rotating polishing wheels 9, which can greatly improve the polishing efficiency of the fuel nozzle. In addition, with the two sets of machine clamping structures, the two ends of the nozzle can be alternately clamped during the process of the nozzle being driven to move by the telescopic structure. In this way, there is no need to disassemble the nozzle and readjust the clamping position of the nozzle, so the nozzle can be thoroughly polished, and the operation is more labor-saving and convenient.

[0034] See also Figure 1 , Figure 5 , Figure 6 and Figure 7The telescopic structure includes an intermediate block 14 which is respectively sleeved on the middle of the first fixed rod 12 and the second fixed rod 13, and a corresponding intermediate block 14 is fixedly sleeved on the first fixed rod 12. A first electric telescopic rod 15 is installed at the lower position of the two intermediate blocks 14 close to each other on one side. One end of the output shaft of the first electric telescopic rod 15 is connected to an L-shaped rod 16, and one end of the L-shaped rod 16 is connected to a rotating sleeve 18. The rotating sleeve 18 is rotatably sleeved on the pushing block 17. An annular groove for the sleeve 18 is provided on the side of the pushing block 17. The clamping structure is arranged on one end of the pushing block 17, and a rotating structure is arranged between the other end of the pushing block 17 and the intermediate block 14. A driving structure is arranged between the rotating sleeve 18 on the left side and the slide plate 11. When the first electric telescopic rod 15 on the intermediate block 14 is started, the rotating sleeve 18 and the pushing block 17 are driven to move as a whole, and the nozzle clamped on the clamping structure can be driven toward the rotating polishing wheel 9 to perform polishing processing;

[0035] The clamping structure includes a fixed sleeve 19 installed at one end of the pushing block 17, and a plurality of second electric telescopic rods 20 are installed on the outer surface of the fixed sleeve 19. A clamping block 21 is installed on one end of the output shaft of each second electric telescopic rod 20 inserted into the fixed sleeve 19. After inserting one end of the nozzle to be polished into the fixed sleeve 19 on the left, the corresponding second electric telescopic rod 20 can be started to drive the clamping block 21 to move in the fixed sleeve 19, thereby clamping and fixing one end of the nozzle.

[0036] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The rotating structure includes a push-pull rod 22 connected to the other end of the pushing block 17, a fixed tube 23 is movably sleeved on the push-pull rod 22, one end of the fixed tube 23 is connected to the middle block 14, a spiral groove 25 is provided on the push-pull rod 22, and an insertion rod 24 is fixedly inserted into the end of the fixed tube 23 away from the middle block 14, and one end of the insertion rod 24 is slidably set in the spiral groove 25. When the first electric telescopic rod 15 drives the nozzle to move, it drives the push-pull rod 22 to slide in the fixed tube 23. By sliding one end of the insertion rod 24 in the spiral groove 25, the push-pull rod 22 and the pushing block 17 as a whole rotate during the movement, thereby driving the nozzle to rotate during the movement, so that the polishing wheel 9 can polish various positions on the nozzle;

[0037] The driving structure includes a plurality of third fixing rods 26 connected to the side of the left rotating sleeve 18, and the ends of the plurality of third fixing rods 26 away from the rotating sleeve 18 are connected to the driving ring 27. A transverse plate 28 is connected to one side of each slide plate 11 close to the driving ring 27. The transverse plate 28 is provided with a first transverse groove 29 along its length direction. The driving ring 27 moves through the plurality of first transverse grooves 29 respectively. The transverse plate 28 is provided with a guide groove 30 connected to the first transverse groove 29. The guide groove 30 is in a wave-like shape (the shape of the guide groove 30 is as shown in FIG. 1 ). Figure 5 As shown in the figure, when the rotating sleeve 18 on the left side moves toward the polishing wheel 9, it synchronously drives the driving ring 27 at one end of the third fixed rod 26 to move. When the driving ring 27 slides in the guide groove 30, the driving ring 27 squeezes the groove wall of the guide groove 30, thereby driving multiple slides 11 to move synchronously along the radial direction of the intermediate ring 4 in the corresponding slide groove 10, and then according to the different outer diameters of different positions on the nozzle, the position of the polishing wheel 9 is adjusted accordingly, so that the nozzle can be polished more thoroughly.

[0038] See also Figure 1 , Figure 2 , Figure 3 , Figure 8 and Fig. 9 The collecting structure includes a placing plate 31 fixedly installed between the two second supporting plates 3 at the bottom, a material receiving frame 32 is arranged on the placing plate 31 through a hook structure, the material receiving frame 32 and the placing plate 31 are both arranged to tilt upward in the direction of the middle ring 4, a material inlet 33 is provided at the upper end of the material receiving frame 32, a handle 34 is installed at the middle of the upper part of the material receiving frame 32, a rubber pad is bonded to the inner wall of the material receiving frame 32, and the polished nozzles can be collected by the material receiving frame 32. The setting of the rubber pad reduces the collision between the nozzle and the inner wall of the material receiving frame 32, which may cause damage to the nozzle;

[0039] The hook structure includes a hook block 35 arranged at the front and rear edges of the upper end of the lower side of the material receiving frame 32. The hook block 35 is in an "L" shape. A slot 36 is provided at a position corresponding to the hook block 35 on the placement plate 31. The hook block 35 is fastened in the slot 36. The material receiving frame 32 is installed on the placement plate 31 through the hook block 35 and the slot 36, which facilitates the installation or removal of the material receiving frame 32 on the placement plate 31.

[0040] The flip structure includes a side plate 38 fixedly sleeved on both ends of the second fixing rod 13, the second fixing rod 13 movably passes through the corresponding middle block 14, and a second transverse groove 39 distributed in the transverse direction is opened on the side plate 38. The two second transverse grooves 39 are movably inserted with a driving rod 37 in the middle. The two driving rods 37 are close to each other and are connected to the rotating sleeve 18 on the right side. The side plate 38 is provided with an arc groove 40 connected to the right end of the second transverse groove 39. When one end of the nozzle is clamped in the right fixing sleeve 19, through the first When the electric telescopic rod 15 drives the polished nozzle to move toward the material receiving frame 32, the rotating sleeve 18 on the right drives one end of the driving rod 37 to slide in the second transverse groove 39 and the arc groove 40. When one end of the driving rod 37 slides in the arc groove 40, it can drive the middle block 14 on the right side to rotate on the second fixed rod 13, and then rotate the nozzle down to the position of the feed port 33 of the material receiving frame 32. At the same time, the second electric telescopic rod 20 is started to release the nozzle, so that the nozzle can automatically fall into the material receiving frame 32 for collection.

[0041] The implementation principle of the polishing device for the precision parts of a fuel nozzle according to the embodiment of the present invention is as follows: first, insert one end of the nozzle to be polished into the fixing sleeve 19 on the right side, start the second electric telescopic rod 20 on the fixing sleeve 19 on the right side, drive the corresponding clamping block 21 to move in the fixing sleeve 19 in the direction of approaching each other, and then clamp one end of the fixed nozzle, then start the motors 7 on the multiple slides 11 at the same time, drive the multiple groups of rotating rods 8 and the polishing wheel 9 to rotate, and start the first electric telescopic rods 15 on the two middle blocks 14, and drive the two fixing sleeves 19 to move toward the polishing wheel 9 through the L-shaped rod 16 and the pushing block 17, and the left side The fixed sleeve 19 drives the nozzle to move to the polishing wheel 9 for polishing, and multiple polishing wheels 9 are used to polish the nozzle at the same time, which greatly improves the polishing work efficiency. In the process of moving, the push block 17 drives the push-pull rod 22 to move in the fixed tube 23. The sliding of one end of the insertion rod 24 in the spiral groove 25 can drive the push-pull rod 22 and the push block 17 to rotate as a whole, so that the nozzle rotates during the movement, so that the polishing wheel 9 can polish various positions on the nozzle, improving the polishing quality. At the same time, the movement of the left push block 17 and the rotating sleeve 18 will drive the driving ring 27 in multiple first transverse grooves. 29 and the guide groove 30, and the driving ring 27 is used to squeeze the groove wall of the guide groove 30 to drive the multiple slide plates 11 to move synchronously in the radial direction of the intermediate ring 4 in the corresponding slide groove 10, and then the position of the polishing wheel 9 can be adjusted accordingly according to the different outer diameters of different positions on the nozzle, so that the nozzle can be polished more thoroughly. When one end of the nozzle is inserted into the right fixed sleeve 19, the second electric telescopic rod 20 on the right fixed sleeve 19 is started to drive the corresponding clamping block 21 to clamp and fix the other end of the nozzle in the right fixed sleeve 19, and at the same time, the second electric telescopic rod 20 on the right drives the nozzle to move closer to the receiving material. The frame 32 moves in the direction of the polishing wheel 9 so that the remaining position on the nozzle can be polished smoothly. The rotating sleeve 18 on the right side will drive the end of the driving rod 37 to slide in the second transverse groove 39 and the arc groove 40 while moving. The sliding of one end of the driving rod 37 in the arc groove 40 can drive the middle block 14 on the right side to rotate on the second fixed rod 13, and then the polished nozzle is turned down to the feed port 33 of the receiving frame 32, and the second electric telescopic rod 20 on the right side fixed sleeve 19 is started to loosen the nozzle so that the nozzle can fall into the receiving frame 32 for collection, so that the polishing work of the fuel nozzle can be realized.

[0042] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A polishing device for a precision fuel nozzle part, comprising a base plate (1) and a polishing wheel (9), characterized in that: Two first support plates (2) are fastened with bolts at the left edge of the upper side of the bottom plate (1), and two second support plates (3) are fastened with bolts at the right edge of the upper side of the bottom plate (1). A first fixing rod (12) is fixedly passed through the top position between the two first support plates (2), and a second fixing rod (13) is passed through the top position between the two second support plates (3). Telescopic structures are provided on the first fixing rod (12) and the second fixing rod (13), and clamping structures are provided at one end of the two telescopic structures. A polishing structure is provided at the middle of the upper side of the bottom plate (1), and a collecting structure is provided at the lower side between the two second support plates (3). Flipping structures are provided at both ends of the second fixing rod (13). The polishing structure comprises an intermediate ring (4) arranged in the middle of the upper part of the bottom plate (1), the intermediate ring (4) being connected to two connecting rods (5), the two ends of each connecting rod (5) being respectively connected to the first support plate (2) and the second support plate (3), the inner wall of the intermediate ring (4) being connected to a plurality of inner plates (6), the plurality of inner plates (6) being distributed at equal angles on the circumference of the intermediate ring (4), each of the inner plates (6) being provided with a slide groove (10), a slide plate (11) being slidably arranged in the slide groove (10), a motor (7) being installed on one side surface of each of the slide plates (11), one end of the output shaft of the motor (7) being connected to a rotating rod (8) which rotates and passes through the slide plate (11), and a polishing wheel (9) being fixedly sleeved on one end of the rotating rod (8) passing through the slide plate (11); The telescopic structure comprises intermediate blocks (14) respectively sleeved on the middle of the first fixed rod (12) and the second fixed rod (13); a corresponding intermediate block (14) is fixedly sleeved on the first fixed rod (12); a first electric telescopic rod (15) is installed at a lower position of one side of the two intermediate blocks (14) close to each other; one end of the output shaft of the first electric telescopic rod (15) is connected to an L-shaped rod (16); one end of the L-shaped rod (16) is connected to a rotating sleeve (18); the rotating sleeve (18) is rotatably sleeved on the pushing block (17); the clamping structure is arranged on one end of the pushing block (17); a rotating structure is arranged between the other end of the pushing block (17) and the intermediate block (14); and a driving structure is arranged between the rotating sleeve (18) on the left and the slide plate (11); The driving structure comprises a plurality of third fixing rods (26) connected to the side of the left rotating sleeve (18), the ends of the plurality of third fixing rods (26) away from the rotating sleeve (18) are connected to the driving ring (27), a side surface of each of the slide plates (11) close to the driving ring (27) is connected to a transverse plate (28), a first transverse groove (29) is provided on the transverse plate (28) along its length direction, the driving ring (27) moves through the plurality of first transverse grooves (29), and a guide groove (30) connected to the first transverse groove (29) is provided on the transverse plate (28), and the guide groove (30) is in a wave-like shape; The flip structure comprises side plates (38) fixedly sleeved on both ends of the second fixing rod (13); the second fixing rod (13) movably passes through the corresponding middle block (14); the side plates (38) are provided with second transverse grooves (39) distributed in the transverse direction; driving rods (37) are movably inserted in the two second transverse grooves (39); the two driving rods (37) are close to each other and are connected to the rotating sleeve (18) on the right side at one end; and the side plates (38) are provided with an arc groove (40) connected to the right end of the second transverse groove (39).

2. The polishing device for precision fuel nozzle parts according to claim 1 is characterized in that: The clamping structure comprises a fixing sleeve (19) mounted on one end of a pushing block (17), a plurality of second electric telescopic rods (20) being mounted on an outer surface of the fixing sleeve (19), and a clamping block (21) being mounted on one end of an output shaft of each second electric telescopic rod (20) inserted into the fixing sleeve (19).

3. The polishing device for precision fuel nozzle parts according to claim 1 is characterized in that: The rotating structure comprises a push-pull rod (22) connected to the other end of the pushing block (17); a fixed tube (23) is movably sleeved on the push-pull rod (22); one end of the fixed tube (23) is connected to the middle block (14); a spiral groove (25) is provided on the push-pull rod (22); an insertion rod (24) is fixedly inserted into the end of the fixed tube (23) away from the middle block (14); one end of the insertion rod (24) is slidably arranged in the spiral groove (25).

4. The polishing device for precision fuel nozzle parts according to claim 1, characterized in that: The collecting structure comprises a placing plate (31) fixedly mounted between the two second supporting plates (3) at the bottom, a material receiving frame (32) being arranged on the placing plate (31) via a hook structure, the material receiving frame (32) and the placing plate (31) being arranged to be inclined upwards in the direction of the middle ring (4), a material feed port (33) being provided at the upper end of the material receiving frame (32), a handle (34) being mounted at the middle of the upper portion of the material receiving frame (32), and a rubber pad being bonded to the inner wall of the material receiving frame (32).

5. The polishing device for precision fuel nozzle parts according to claim 4 is characterized in that: The hook structure comprises a hook block (35) arranged at the front and rear edges of the upper end of the lower side of the material receiving frame (32); the hook block (35) is in an "L" shape; a slot (36) is provided on the placement plate (31) at a position corresponding to the buckle block (35); the buckle block (35) is fastened in the slot (36).

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