A multifunctional engine fuel injection nozzle polishing device

Abstract

The present invention discloses a multifunctional engine fuel injection nozzle polishing device, which relates to the technical field of drum polishing, and comprises a drum, one side of which is fixedly connected to a motor, the drum is rotatably connected to a rotating rod in a transversely penetrating manner, the rotating rod is fixedly connected to the output shaft of the motor, the rotating rod is slidably connected to a circumferentially distributed rotating plate in an arc shape, the rotating plate is slidably connected to two brackets in a horizontal manner, the drum is slidably connected to a slider symmetrically distributed along the drum, and the slider is used to push the bracket to slide. The present invention cooperates with the convex surface of the bracket and the extrusion surface of the slider, so that the positioning column can automatically fix the fuel injection nozzle to prevent it from falling into the polishing medium during polishing, thereby reducing subsequent sorting operations, and at the same time, it can automatically protect both ends of the fuel injection nozzle to prevent the polishing medium from causing unnecessary wear to the end and interior of the fuel injection nozzle.

Description

Technical Field

[0001] The invention relates to the technical field of drum polishing, in particular to a multifunctional engine oil injection nozzle polishing device. Background Art

[0002] The initial surface polishing step in the production process of fuel injectors is part of the processing, which aims to remove surface defects left during the manufacturing process and ensure that the surface of the fuel injector reaches a certain degree of smoothness. This process is crucial to ensuring the fuel atomization effect, improving engine efficiency and reducing emissions. During the initial polishing stage of fuel injector production, large-scale processing requires roller polishing. Usually, specific polishing media are added to the roller. The roller polishing medium can be polishing materials of different hardness and shape, such as ceramic beads, stainless steel beads, polishing sand, etc.

[0003] When using a roller to polish the surface of the fuel injector, since both ends of the fuel injector usually require more precise polishing to ensure perfect coordination with the engine system, during the initial polishing process, if no protection is provided, the polishing medium in the roller may cause unnecessary wear to these sensitive areas, affecting their sealing performance and the accuracy of fuel injection. At the same time, since the fuel injector is small in size and delicate in shape, once mixed in the polishing medium, manual sorting is not only time-consuming and laborious, but may also cause physical damage to the fuel injector inadvertently during operation, increasing the defective rate.

[0004] Based on the above situation, the present invention proposes a multifunctional engine fuel injection nozzle polishing device. Summary of the invention

[0005] In order to overcome the disadvantage that polishing materials damage the two ends and the internal sensitive areas of the fuel injection nozzle during surface polishing, the present invention provides a multifunctional engine fuel injection nozzle polishing device.

[0006] A multifunctional engine fuel injector polishing device comprises a roller, one side of the roller is fixedly connected to a motor, the roller is horizontally rotatably connected to a rotating rod, the rotating rod is fixedly connected to the output shaft of the motor, the rotating rod is arc-shaped and slidingly connected to a circumferentially distributed rotating plate, the rotating plate is slidably connected to two brackets, adjacent brackets are cross-distributed, at least one spring piece is fixedly connected between the bracket and the adjacent rotating plate, the bracket is rotatably connected to a plurality of positioning columns, when adjacent brackets cross, the positioning columns on adjacent brackets correspond one to one, the roller is horizontally slidably connected to a slider symmetrically distributed along the roller, the slider is used to push the bracket to slide, a placement component for placing fuel injectors and automatically opening during polishing is provided between adjacent brackets, and the roller is provided with a control component for controlling the slider.

[0007] Furthermore, the placement assembly includes placement plates distributed in pairs, the placement plates distributed in pairs are rotatably connected between adjacent brackets, the adjacent placement plates are used to place fuel injectors, the placement plates are provided with slide grooves symmetrically distributed along the placement plates, and the bracket is provided with a protrusion on one side close to the slide groove, and the protrusion is limitedly matched with the adjacent slide groove.

[0008] Furthermore, the control component includes a slide symmetrically distributed along the roller, the slide is vertically slidably connected to the roller, the slide is used to limit the adjacent slider when taking and placing the injector nozzle, and release the limit during rotational polishing, a first spring is fixed between the slide and the roller, the roller is arc-shapedly slidably connected to an arc-shaped cover plate, the arc-shaped cover plate is fixed with a clamping rod symmetrically distributed along the arc-shaped cover plate, and the clamping rod is in contact with the adjacent slide.

[0009] Furthermore, a convex surface is provided on one side of the card holder close to the adjacent slider, and an extrusion surface symmetrically distributed up and down is provided on one side of the slider close to the card holder, and the slider is extruded and matched with the convex surface of the adjacent card holder through the extrusion surface.

[0010] Furthermore, a slope is provided on a side of the slide bracket close to the slider, and the slope is pressed and matched with the adjacent slider.

[0011] Furthermore, the adjacent placement plates are provided with a limiting groove for stably placing the fuel injector.

[0012] Furthermore, a multifunctional engine fuel injector polishing device also includes a rotating block evenly distributed in the circumferential direction, wherein the rotating block is fixedly connected to the side of the rotating rod away from the motor, the side of the roller close to the rotating block is fixedly connected to a fixed rod, the side of the rotating rod close to the rotating block is movably connected to a sliding plate, the sliding plate is squeezed and fitted with the rotating block, the sliding plate is slidably connected to the fixed rod, and a second spring is fixedly connected between the sliding plate and the roller.

[0013] Furthermore, a side of the sliding plate close to the rotating block is provided with positioning surfaces distributed at equal intervals in the circumferential direction, and a wedge-shaped surface is provided between adjacent positioning surfaces.

[0014] Furthermore, a multifunctional engine fuel injector polishing device also includes a plurality of rotating racks, wherein the rotating racks are fixedly connected to the ends of the positioning columns, the rotating plates are provided with rectangular holes distributed at equal intervals, the rotating racks are located in the rectangular holes, and adjacent rotating racks are in contact with each other.

[0015] Furthermore, a multifunctional engine injector polishing device also includes a plurality of arc rods, wherein the arc rods are fixedly connected to one side of the rotating rod near the end, and the arc rods are used to guide the rotating plate. Each of the arc rods is wound with two third springs, and the two ends of the third springs are respectively fixedly connected to the adjacent rotating plate and the rotating rod.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] The convex surface of the clamping frame cooperates with the extrusion surface of the slider, so that the positioning column can automatically fix the fuel injector to prevent it from falling into the polishing medium during polishing, thereby reducing subsequent sorting operations. At the same time, the two ends of the fuel injector can be automatically protected to prevent the polishing medium from causing unnecessary wear to the end and interior of the fuel injector.

[0018] The present invention utilizes the locating column to be rotatably connected with the slide, so that when the oil spray nozzle contacts the polishing medium, it can not only rotate with the rotating rod, but also rotate by the driving action of the polishing medium, thereby realizing multi-directional surface polishing and more comprehensive polishing.

[0019] The present invention also cooperates with the protrusions and the slide grooves to allow the placement plate to automatically open during polishing to avoid partial obstruction of the fuel injector and the inability to polish in all directions, and to automatically close when rotating to the front side, making it convenient to take and place the fuel injector.

[0020] The present invention closes the arc cover plate by pulling the arc cover plate forward, thereby releasing the limiting effect of the slide on the slide block, preventing the positioning column from temporarily loosening the oil nozzle when the convex surface passes through the extrusion surface during the rotary polishing process, and preventing the oil nozzle from losing its fixation and flying out centrifugally when it rotates to the front side during polishing.

[0021] The present invention ensures that when the driving rotating rod stops rotating at any time, a rotating plate will always be positioned and stopped at the front side through the cooperation of the rotating block and the sliding plate, so as to facilitate the taking and placing of the fuel injection nozzle.

[0022] When the rotating plate of the present invention passes through the polishing media at the bottom of the drum, the rotating frame will contact the polishing media and rotate due to the compression thereof, thereby assisting the positioning column to rotate, so that the oil injection nozzle can be polished more comprehensively.

[0023] When the rotating plate of the present invention is separated from the polishing medium, the third spring reset drives the rotating plate to slide and reset along the arc rod on the rotating rod, which has a sudden shaking effect and can shake off the polishing medium attached to the rotating plate and other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0025] Figure 2It is a three-dimensional structural schematic diagram of the drum, motor, rotating rod and other components of the present invention.

[0026] Figure 3 It is a three-dimensional structural schematic diagram of components such as the card holder, spring pieces and positioning columns of the present invention.

[0027] Figure 4 It is a partial three-dimensional structural cross-sectional view of the rotating rod and the rotating plate of the present invention.

[0028] Figure 5 This is a three-dimensional structural separation diagram of the components such as the rotating plate, the bracket and the positioning column of the present invention.

[0029] Figure 6 It is a three-dimensional structural separation diagram of the slide bracket, the first spring and the sliding block of the present invention.

[0030] Figure 7 It is a three-dimensional structural schematic diagram of components such as the card holder, positioning columns and placement plate of the present invention.

[0031] Figure 8 It is a three-dimensional structural schematic diagram of the arc-shaped cover plate, the second spring, the rotating block and other components of the present invention.

[0032] Fig. 9 This is a three-dimensional structural separation diagram of the components such as the rotating block, the fixing rod and the sliding plate of the present invention.

[0033] Fig.10 It is a schematic diagram of the three-dimensional structure of the rotating plate, the clamping frame, the positioning column and the rotating frame of the present invention.

[0034] Fig.11 It is a three-dimensional structural schematic diagram of the rotating rod, the arc rod, the third spring and other components of the present invention.

[0035] Figure numbers: 1, roller, 2, motor, 3, rotating rod, 4, rotating plate, 5, bracket, 51, convex surface, 6, spring piece, 7, positioning column, 8, slide, 9, first spring, 10, slider, 101, extrusion surface, 102, inclined surface, 103, limiting groove, 11, placement plate, 111, protrusion, 112, slide groove, 12, arc-shaped cover plate, 13, bracket, 14, rotating block, 15, fixing rod, 16, sliding plate, 161, positioning surface, 162, wedge-shaped surface, 17, second spring, 18, rotating bracket, 19, arc-shaped rod, 20, third spring. DETAILED DESCRIPTION

[0036] The preferred technical solutions of the present invention are described in detail below with reference to the accompanying drawings.

[0037] Embodiment 1: A multifunctional engine fuel injection nozzle polishing device, combined with the attached Figure 1 To Attachment Figure 7, including a drum 1, a motor 2 is fixedly connected to the left side of the drum 1, a rotating rod 3 is rotatably connected from left to right in the drum 1, and the left end of the rotating rod 3 is fixedly connected to the output shaft of the motor 2. The rotating rod 3 is slidably connected with three circumferentially distributed rotating plates 4, and two card racks 5 are slidably connected to the rotating plate 4. Adjacent card racks 5 are cross-distributed, and the outer sides of two adjacent card racks 5 are provided with convex surfaces 51. Two elastic sheets 6 are fixedly connected between the card racks 5 and the adjacent rotating plates 4. The card racks 5 are rotatably connected with eight positioning columns 7. When adjacent card racks 5 cross, the positioning columns 7 on adjacent card racks 5 correspond to each other one by one. The front part of the drum 1 is vertically slidably connected with a slide 8 symmetrically distributed along the left and right sides of the drum 1, and a first spring 9 is fixedly connected between the slide 8 and the drum 1. The front part of the drum 1 is horizontally slidably connected with a slider 10 symmetrically distributed along the left and right sides of the drum 1. The slider 10 is used to push the card rack 5 to slide on the rotating plate 4, and the slide 8 is used to align the adjacent sliders 1 when taking and placing the injector. 0 is limited, and the limit is released during rotation polishing. The side of the slider 10 close to the bracket 5 is provided with an extrusion surface 101 symmetrically distributed up and down, and the extrusion surface 101 of the slider 10 is extruded and matched with the convex surface 51 of the adjacent bracket 5. The side of the slide 8 close to the slider 10 is provided with an inclined surface 102, and the inclined surface 102 is extruded and matched with the adjacent slider 10. The adjacent brackets 5 are rotatably connected with the placement plates 11 distributed in pairs, and the adjacent placement plates 11 are commonly provided with a plurality of holes for the placement plates 11 to be placed. The limit groove 103 is used to firmly place the injector, and the end of the placement plate 11 is provided with a slide groove 112 which is symmetrically distributed along the placement plate 11. A protrusion 111 is provided on the side of the bracket 5 close to the slide groove 112, and the protrusion 111 is limitedly matched with the adjacent slide groove 112. The upper arc-shaped sliding connection on the front side of the drum 1 is connected with an arc-shaped cover plate 12, and the front end of the arc-shaped cover plate 12 is fixedly connected with a clamping rod 13 which is symmetrically distributed along the arc-shaped cover plate 12, and the clamping rod 13 is in contact with the adjacent slide 8.

[0038] When using the present polishing device to polish the fuel injector, first put an appropriate amount of spherical polishing medium for polishing the surface of the fuel injector into the bottom of the drum 1, and then rotate one of the rotating plates 4 to the front side so that the convex surface 51 of the bracket 5 contacts the extrusion surface 101 of the slider 10. Under the action of the extrusion surface 101, the two brackets 5 on the rotating plate 4 move toward each other, and the spring 6 is compressed, so that the two opposite positioning columns 7 are moved away from each other. Then, multiple fuel injectors to be polished are placed one by one on the limiting groove 103 on the placement plate 11 between the two opposite positioning columns 7. In this way, it is convenient to place the fuel injectors to be polished. After placing them, continue to rotate the rotating plate 4 120 degrees so that the next rotating plate 4 rotates to the front side, and place the fuel injectors one by one in the same way until the fuel injectors are placed on the placement plates 11 on all the rotating plates 4.

[0039] During the above-mentioned rotation process, the convex surface 51 of the bracket 5 on the rotating plate 4 gradually disengages from the extrusion surface 101 of the slider 10. At the moment of disengagement, the two brackets 5 on the rotating plate 4 move back to back under the resetting effect of the spring piece 6, so that the two opposite positioning columns 7 are close to each other. In this way, the fuel injector can be automatically fixed and the two ends of the fuel injector can be automatically protected. At the same time, the protrusions 111 on the two brackets 5 are also close to each other like the positioning columns 7, so that the placement plate 11 is swung downward through the slide groove 112. In this way, the placement plate 11 no longer blocks the fuel injector, avoiding interference with the subsequent polishing of the fuel injector.

[0040] After all the fuel injectors are placed, start the motor 2. The output shaft of the motor 2 drives the rotating rod 3 to drive the rotating plate 4 to rotate continuously. The rotating plate 4 drives the bracket 5, spring piece 6, positioning column 7, placement plate 11 and the fuel injector thereon to rotate, so that the fuel injector intermittently passes through the polishing medium at the bottom of the drum 1, thereby achieving the purpose of polishing the surface of the fuel injector. After polishing is completed, turn off the motor 2, and then rotate the three rotating plates 4 to the front side in batches. When the rotating plate 4 is located at the front side, the positioning columns 7 thereon automatically loosen the two ends of the fuel injector, so that it is convenient to remove the polished fuel injector.

[0041] In summary, the present invention cooperates with the convex surface 51 of the bracket 5 and the extrusion surface 101 of the slider 10, so that the positioning column 7 can automatically fix the fuel injector to prevent it from falling into the polishing medium during polishing, thereby reducing subsequent sorting operations. At the same time, it can automatically protect both ends of the fuel injector to prevent the polishing medium from causing unnecessary wear on the end and interior of the fuel injector.

[0042] The present invention utilizes the rotatable connection between the positioning column 7 and the slide 8, so that when the oil nozzle contacts the polishing medium, it can not only rotate with the rotating rod 3, but also rotate under the driving effect of the polishing medium, thereby realizing multi-directional surface polishing and more comprehensive polishing.

[0043] The present invention also uses the limiting cooperation between the protrusion 111 and the slide groove 112 to enable the placement plate 11 to automatically open during polishing to avoid partial obstruction of the fuel injector and the inability to polish in all directions, and automatically close when rotating to the front side to facilitate the removal and placement of the fuel injector.

[0044] In order to prevent the positioning column 7 from temporarily releasing the oil nozzle when the convex surface 51 passes through the extrusion surface 101 during the rotary polishing process, the specific operation is as follows:

[0045] Initially, the arc cover 12 is closed and the first spring 9 is in a compressed state. When the injector needs to be placed, the arc cover 12 is pushed backward so that the arc cover 12 is opened. The arc cover 12 drives the clamping rod 13 to rotate together, so that the clamping rod 13 is disengaged from the slide 8. The first spring 9 in a compressed state is reset to drive the slide 8 to slide upward, so that the slider 10 is limited by the adjacent slide 8 and cannot move horizontally. In this way, in the subsequent process of placing the injector, the extrusion surface 101 of the slider 10 can be normally utilized for extrusion matching with the convex surface 51 of the clamping frame 5.

[0046] After all the fuel injectors are placed and before starting the motor 2, the arc cover 12 is pulled forward to close the arc cover 12, and the arc cover 12 drives the clamping rod 13 to rotate together, so that the clamping rod 13 contacts the slide 8 and squeezes the slide 8 to slide downward, and the first spring 9 is compressed. In this way, in the subsequent polishing process, the slider 10 will be squeezed by the clamping frame 5, so that the slider 10 moves horizontally to contact the inclined surface 102 of the adjacent slide 8, and the clamping frame 5 will not slide, so that the positioning column 7 will not temporarily loosen the fuel injector, avoiding the fuel injector from losing its fixation and flying out centrifugally when it rotates to the front side during polishing.

[0047] When the injector needs to be removed, the arc cover 12 needs to be pushed back again to open it. The first spring 9 in the compressed state is reset to drive the slide 8 to slide upward. Under the squeezing effect of the inclined surface 102, the slider 10 moves in the opposite direction to reset, and is again blocked by the adjacent slide 8 and cannot move horizontally.

[0048] Embodiment 2: Based on embodiment 1, Figure 8 To Attachment Fig. 9 , and also includes three circumferentially evenly distributed rotating blocks 14, the rotating block 14 is fixedly connected to the right side of the rotating rod 3, a fixed rod 15 is fixedly connected to the upper right side of the drum 1, a sliding plate 16 is movably connected to the right side of the rotating rod 3, and a positioning surface 161 with circumferentially evenly distributed positioning surfaces 161 is arranged on the right side of the sliding plate 16, and a wedge surface 162 is arranged between adjacent positioning surfaces 161, the wedge surface 162 of the sliding plate 16 is pressed and matched with the rotating block 14, the sliding plate 16 is slidably connected to the fixed rod 15, and a second spring 17 is fixedly connected between the sliding plate 16 and the drum 1.

[0049] In order to ensure that when the driving rod 3 stops rotating, for example, when the motor 2 stops, a rotating plate 4 will be positioned and stopped at the front side, so as to facilitate the removal and placement of the fuel injector. The specific operation is as follows:

[0050] When the rotating rod 3 rotates, it drives the rotating block 14 to rotate. When the rotating block 14 rotates to the wedge surface 162, the rotating block 14 squeezes the sliding plate 16 to slide to the left, and the second spring 17 is compressed. When the rotating block 14 rotates to the positioning surface 161, the second spring 17 resets and drives the sliding plate 16 to slide to the right. In this way, when the rotating rod 3 stops rotating, if the rotating block 14 rotates to the positioning surface 161, it is obvious that a rotating plate 4 is positioned and stopped on the front side. If the rotating block 14 rotates to the wedge surface 162, the compressed second spring 17 resets and drives the sliding plate 16 to slide to the right, thereby squeezing the rotating block 14 to rotate to the positioning surface 161, and there will also be a rotating plate 4 positioned and stopped on the front side.

[0051] Embodiment 3: Based on Embodiment 2, Fig.10 , and also includes a plurality of rotating racks 18, wherein the rotating racks 18 are fixedly connected to the ends of the positioning columns 7, and the rotating plate 4 is provided with three rectangular holes distributed at equal intervals, and the rotating racks 18 are located in the rectangular holes, and the inner ends of adjacent rotating racks 18 are in contact with each other.

[0052] When the rotating plate 4 passes through the polishing media at the bottom of the drum 1, the rotating frame 18 will come into contact with the polishing media and rotate due to the compression thereof, thereby assisting the rotation of the positioning column 7 so that the oil nozzle can be polished more comprehensively. In addition, a portion of the polishing media lifted by the rotating plate 4 will fall back to the bottom of the drum 1 through the rectangular hole at the rotating frame 18.

[0053] Combined with Fig.11 , and also includes six arc rods 19, three of which are fixedly connected to the left end side of the rotating rod 3, and the other three are fixedly connected to the right end side of the rotating rod 3. The arc rods 19 are used to guide the rotating plate 4. Each arc rod 19 is wound with two third springs 20, and the two ends of the third springs 20 are respectively fixedly connected to the adjacent rotating plate 4 and the rotating rod 3.

[0054] When the rotating plate 4 rotates and passes through the polishing medium at the bottom of the drum 1, due to a certain resistance, the third spring 20 connected thereto is deformed and accumulates force. When the rotating plate 4 is separated from the polishing medium, the third spring 20 is reset and drives the rotating plate 4 to slide and reset along the arc rod 19 on the rotating rod 3, which has the effect of a sudden shake, and can shake off the polishing medium attached to the rotating plate 4 and other components.

[0055] While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims

1. A multifunctional engine fuel injection nozzle polishing device, comprising a roller (1), one side of the roller (1) is fixedly connected to a motor (2), the roller (1) is rotatably connected to a rotating rod (3) in a transversely penetrating manner, the rotating rod (3) is fixedly connected to an output shaft of the motor (2), and is characterized in that: It also includes a circumferentially distributed rotating plate (4), the rotating plate (4) being connected to the rotating rod (3) in an arc-shaped sliding manner, the rotating plate (4) being connected to two brackets (5) in a sliding manner, the adjacent brackets (5) being distributed crosswise, at least one spring plate (6) being fixedly connected between the brackets (5) and the adjacent rotating plate (4), the brackets (5) being connected to a plurality of positioning columns (7) in a rotational manner, and when the adjacent brackets (5) are crossed, the positioning columns (7) on the adjacent brackets (5) are in one-to-one correspondence, the roller (1) being connected to sliders (10) symmetrically distributed along the roller (1) in a horizontal sliding manner, the sliders (10) being used to push the brackets (5) to slide, a placement component for placing an oil spray nozzle and automatically opening during polishing is provided between the adjacent brackets (5), and the roller (1) is provided with a control component for controlling the sliders (10); The placement assembly comprises placement plates (11) distributed in pairs, the placement plates (11) distributed in pairs are rotatably connected between adjacent brackets (5), the adjacent placement plates (11) are used to place fuel injectors, the placement plates (11) are provided with slide grooves (112) symmetrically distributed along the placement plates (11), and a protrusion (111) is provided on one side of the bracket (5) close to the slide groove (112), and the protrusion (111) is limitedly matched with the adjacent slide groove (112); A convex surface (51) is provided on one side of the card frame (5) close to the adjacent slider (10), and an extrusion surface (101) symmetrically distributed up and down is provided on one side of the slider (10) close to the card frame (5), and the slider (10) is extruded and matched with the convex surface (51) of the adjacent card frame (5) through the extrusion surface (101); The control component comprises a slide (8) symmetrically distributed along the roller (1), the slide (8) being vertically slidably connected to the roller (1), the slide (8) being used to limit the adjacent slider (10) when taking and placing the oil nozzle, and releasing the limit during rotational polishing, a first spring (9) being fixedly connected between the slide (8) and the roller (1), the roller (1) being arc-shapedly slidably connected to an arc-shaped cover plate (12), the arc-shaped cover plate (12) being fixedly connected to a clamping rod (13) symmetrically distributed along the arc-shaped cover plate (12), and the clamping rod (13) being in contact with the adjacent slide (8); A slope (102) is provided on one side of the slide bracket (8) close to the slider (10), and the slope (102) is pressed and matched with the adjacent slider (10).

2. A multifunctional engine fuel injection nozzle polishing device according to claim 1, characterized in that: The adjacent placement plates (11) are provided with a common limiting groove (103) for stably placing the fuel injection nozzle.

3. A multifunctional engine fuel injection nozzle polishing device according to claim 2, characterized in that: It also includes a rotating block (14) evenly distributed in the circumferential direction, the rotating block (14) being fixedly connected to a side of the rotating rod (3) away from the motor (2), a fixed rod (15) being fixedly connected to a side of the roller (1) close to the rotating block (14), a sliding plate (16) being movably connected to a side of the rotating rod (3) close to the rotating block (14), the sliding plate (16) being pressed and fitted with the rotating block (14), the sliding plate (16) being slidably connected to the fixed rod (15), and a second spring (17) being fixedly connected between the sliding plate (16) and the roller (1).

4. A multifunctional engine fuel injection nozzle polishing device according to claim 3, characterized in that: Positioning surfaces (161) distributed at equal intervals in the circumferential direction are provided on one side of the sliding plate (16) close to the rotating block (14), and wedge-shaped surfaces (162) are provided between adjacent positioning surfaces (161).

5. A multifunctional engine fuel injection nozzle polishing device according to claim 4, characterized in that: It also includes a plurality of rotating racks (18), the rotating racks (18) being fixedly connected to the ends of the positioning columns (7), the rotating plate (4) being provided with rectangular holes distributed at equal intervals, the rotating racks (18) being located in the rectangular holes, and adjacent rotating racks (18) being in contact with each other.

6. A multifunctional engine fuel injection nozzle polishing device according to claim 5, characterized in that: It also includes a plurality of arc-shaped rods (19), the arc-shaped rods (19) being fixedly connected to one side of the rotating rod (3) near the end, the arc-shaped rods (19) being used to guide the rotating plate (4), each of the arc-shaped rods (19) being wound with two third springs (20), the two ends of the third springs (20) being respectively fixedly connected to the adjacent rotating plate (4) and the rotating rod (3).

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