Polishing device for fuel pipe

Abstract

The polishing device for the fuel pipe comprises a polishing device body, a fuel pipe positioning mechanism and a fuel pipe grinding mechanism, a working cavity is formed in the polishing device body, and the fuel pipe positioning mechanism and the fuel pipe grinding mechanism are both fixedly arranged in the working cavity. The plane where the fuel pipe grinding mechanism is located is higher than the plane where the fuel pipe positioning mechanism is located. The fuel pipe grinding mechanism comprises a polishing wheel fixing plate arranged in the working chamber. And the driving source is fixedly arranged on the outer wall of the polishing wheel fixing plate. The polishing wheel is arranged on one side of the polishing wheel fixing plate and rotationally connected with the output end of the driving source, and the polishing wheel pressing component is arranged on the other opposite side of the polishing wheel fixing plate. And one end of the synchronizing mechanism is rotationally connected with the polishing wheel, the other opposite end of the synchronizing mechanism is rotationally connected with the rotating roller in the polishing wheel pressing component, and an adjusting plate is arranged between the rotating roller and the polishing wheel fixing plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment for processing vehicle parts, and in particular relates to a polishing device for a fuel pipe. Background Art

[0002] Polishing is a key step in the production and processing of fuel pipes, which is directly related to the surface quality and overall performance of fuel pipes. Traditional polishing equipment usually has problems such as unreasonable space utilization, complex operation, and poor adaptability, which makes it difficult to meet the production needs of high efficiency and high precision.

[0003] Chinese patent CN215617302U discloses a surface polishing device for automobile fuel pipes, including a supporting mechanism, a polishing mechanism and a wear self-adjusting mechanism. The polishing mechanism is connected to the upper middle part of the supporting mechanism, and the upper middle part of one side of the mounting frame included in the polishing mechanism is rotatably connected to a driving wheel through a variable frequency motor, the middle part of an L-shaped plate connected to the front and rear ends of the mounting frame penetrates and rotatably connects a polishing tube, and the driven wheel sleeved in the middle of the polishing tube is meshed and connected with the driving wheel; the lower middle part of one side of the L-shaped plate is connected to the wear self-adjusting mechanism, and the middle part of the side U-shaped frame included in the wear self-adjusting mechanism penetrates a CCD image sensor equidistantly.

[0004] Although the above scheme solves the problems of time-consuming, labor-intensive and low operating efficiency of the existing polishing device by setting up a polishing mechanism and a wear self-adjusting mechanism, since the actual fuel pipe polishing process involves the coordinated work of multiple mechanisms, such as a support mechanism, a polishing mechanism and a wear self-adjusting mechanism, the precision control of these mechanisms may affect each other under high-speed rotation, resulting in difficulty in overall precision control. At the same time, the polishing mechanism design of this scheme is relatively fixed and may not be able to adapt to fuel pipes of different shapes, sizes and materials. When processing fuel pipes with large differences in size specifications, it may be necessary to adjust or replace the polishing mechanism, which increases the complexity of the operation and production costs.

[0005] Therefore, the applicant proposes a fuel pipe polishing device that can improve both polishing quality and work efficiency. Utility Model Content

[0006] The purpose of the utility model is to provide a polishing device for a fuel pipe to solve the problems raised in the above background technology.

[0007] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: comprising: a polishing device body, a fuel pipe positioning mechanism and a fuel pipe grinding mechanism, wherein a working chamber is provided in the polishing device body, the fuel pipe positioning mechanism and the fuel pipe grinding mechanism are both fixedly arranged in the working chamber, and the plane where the fuel pipe grinding mechanism is located is higher than the plane where the fuel pipe positioning mechanism is located;

[0008] The fuel pipe grinding mechanism comprises:

[0009] A polishing wheel fixing plate is arranged in the working chamber;

[0010] A driving source is fixedly arranged on the outer wall of the polishing wheel fixing plate;

[0011] The polishing wheel is arranged on one side of the polishing wheel fixing plate and is rotatably connected to the output end of the driving source so as to be capable of rotating around the axis of the driving source;

[0012] A polishing wheel pressing member is arranged on the other opposite side of the polishing wheel fixing plate;

[0013] and a synchronization mechanism, one end of which is rotationally connected to the polishing wheel, and the other opposite end of which is rotationally connected to the rotating drum in the polishing wheel pressing member, and an adjustment plate is provided between the rotating drum and the polishing wheel fixing plate;

[0014] Among them, one end of the adjustment plate is fixedly connected to the roller surface in the rotating drum, and the other opposite end of the adjustment plate is fixedly connected to the polishing wheel fixing plate, so that it has the ability to swing along the axis of the rotating drum.

[0015] Preferably, the polishing wheel pressing member comprises:

[0016] The lower pressing member body is fixedly arranged in the working chamber;

[0017] A first positioning and mounting portion is arranged on one side of the lower pressing member body, and the rotating drum is fixedly arranged at the lower end of the first positioning and mounting portion;

[0018] A second positioning and mounting portion is disposed on the other opposite side of the lower pressing member body and partially axially passes through the window portion opened in the adjustment plate;

[0019] And a positioning adjustment mechanism is fixedly arranged on one side of the second positioning installation part and connected with the side ear plate pin shaft arranged on the outer side of the window part.

[0020] Preferably, the positioning adjustment mechanism comprises:

[0021] A lifting motor is fixedly arranged below the adjusting plate;

[0022] The adjusting screw rod is transmission-connected to the output end of the lifting motor and can partially axially pass through the above-mentioned window portion to be connected to the ear plate at the upper end of the second positioning mounting portion;

[0023] And a ball bearing, which is clamped in the U-shaped platform in the middle of the second positioning and mounting part, and is connected to the side ear plate pin provided on the outside of the window part, providing a low-friction contact point for it, so as to achieve vertical adjustment of the U-shaped platform more smoothly and accurately.

[0024] Preferably, it also includes: an inclination angle adjustment portion for adjusting the inclination angle of the polishing wheel fixing plate;

[0025] The tilt angle adjustment unit comprises:

[0026] The hinge shaft is located between the polishing wheel pressing member and the polishing wheel fixing plate and is located above the rotating drum;

[0027] A first hinged portion, fixedly arranged on the polishing wheel fixing plate;

[0028] And a fisheye connecting rod is arranged between the hinge shaft and the first hinge part.

[0029] Preferably, a second hinged portion is hingedly connected between the adjustment plate and the polishing wheel fixing plate.

[0030] Preferably, the fuel pipe positioning mechanism comprises:

[0031] A three-jaw chuck, fixedly arranged on one side of the working chamber;

[0032] And a positioning tailstock is fixedly arranged on the other opposite side of the working chamber, and a conical positioning portion is arranged on one side of the positioning tailstock close to the three-jaw chuck.

[0033] Preferably, the fuel pipe positioning mechanism further comprises:

[0034] A fuel pipe positioning seat is arranged between the positioning tailstock and the three-jaw chuck;

[0035] And a fuel pipe positioning clamp is detachably mounted on the fuel pipe positioning seat.

[0036] Preferably, the fuel pipe positioning chuck comprises at least: a first positioning chuck and a second positioning chuck, the first positioning chuck and the second positioning chuck are both arranged on the fuel pipe positioning seat through a guide mounting groove, and the second positioning chuck and the first positioning chuck are arranged to project each other.

[0037] Preferably, a height adjustment mechanism is provided between the upper top surface of the working chamber and the fuel pipe polishing mechanism.

[0038] Preferably, the height adjustment mechanism is specifically arranged in the form of a scissor structure.

[0039] Compared with the prior art, the beneficial effects of the present invention are:

[0040] 1. By arranging the fuel pipe positioning mechanism and the fuel pipe polishing mechanism in the working chamber at the same time, and placing the polishing mechanism above the positioning mechanism, the space is rationally utilized. This layout can linearize the polishing process of the fuel pipe, simplify the operation steps, and improve work efficiency.

[0041] 2. The design of the adjustment plate allows the polishing wheel to swing according to the axis of the rotating drum to adapt to fuel pipes of different diameters or adjust the polishing pressure, which increases the versatility and flexibility of the equipment. Through the design of the polishing wheel pressing component and the positioning adjustment mechanism, the pressure of the polishing wheel on the fuel pipe can be further accurately controlled to ensure the uniformity of the polishing process and avoid uneven polishing quality or fuel pipe damage due to uneven pressure.

[0042] 3. The design of the tilt angle adjustment part allows the operator to adjust the tilt angle of the polishing wheel fixing plate as needed, thereby optimizing the polishing angle, reducing unnecessary equipment pressure, extending service life, and improving polishing quality.

[0043] 4. The three-jaw chuck and the positioning tailstock are fixed on both sides of the working chamber, which enhances the stability of the entire fuel pipe positioning mechanism and ensures the robustness of the equipment during operation. At the same time, the detachable design of the fuel pipe positioning chuck makes the installation and replacement of the fuel pipe faster and more convenient, improving work efficiency.

[0044] 5. By setting a height adjustment mechanism, such as a scissor structure, the distance between the fuel pipe grinding mechanism and the top surface of the working chamber can be adjusted, further increasing the flexibility and adaptability of the device.

[0045] In summary, the utility model can further improve the processing efficiency on the basis of ensuring the processing quality, greatly enhance the applicability and flexibility of the equipment, and at the same time simplify the operating process and reduce labor intensity. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0047] Figure 1 It is a structural schematic diagram of a polishing device for a fuel pipe;

[0048] Figure 2 It is a schematic diagram of the structure of a fuel pipe grinding mechanism;

[0049] Figure 3 for Figure 2 A magnified view of the local structure of area A in the middle;

[0050] Figure 4 A rear view of a fuel pipe grinding mechanism;

[0051] Figure 5 It is a structural schematic diagram of a fuel pipe positioning mechanism;

[0052] Figure 6is a structural schematic diagram of another fuel pipe positioning mechanism;

[0053] Figure 7 is a structural schematic diagram of another fuel pipe positioning mechanism;

[0054] In the figure: 1. main body of the polishing device; 2. fuel pipe positioning mechanism; 3. fuel pipe grinding mechanism; 4. working chamber; 5. polishing wheel fixing plate; 6. driving source; 7. polishing wheel; 8. polishing wheel pressing member; 9. synchronization mechanism; 10. rotating drum; 11. adjustment plate; 12. pressing member main body; 13. positioning adjustment mechanism; 14. first positioning mounting part; 15. second positioning mounting part; 16. window part; 17. side ear plate; 18. lifting motor; 19. adjusting wire Rod; 20, ball bearing; 21, motor fixing plate; 22, positioning piece; 23, U-shaped table; 24, tilt angle adjustment part; 25, first hinge part; 26, fisheye connecting rod; 27, hinge shaft; 28, second hinge part; 29, three-jaw chuck; 30, positioning tailstock; 31, conical positioning part; 32, fuel pipe positioning seat; 33, fuel pipe positioning chuck; 34, first positioning chuck; 35, second positioning chuck; 36, guide mounting groove; 37, height adjustment mechanism. DETAILED DESCRIPTION

[0055] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0056] Reference Figure 1-Figure 3 The utility model proposes a technical solution for a fuel pipe polishing device, comprising: a polishing device body 1, a fuel pipe positioning mechanism 2 and a fuel pipe grinding mechanism 3. A working chamber 4 is provided in the polishing device body 1. The fuel pipe positioning mechanism 2 and the fuel pipe grinding mechanism 3 are both fixedly arranged in the working chamber 4, and the plane where the fuel pipe grinding mechanism 3 is located is higher than the plane where the fuel pipe positioning mechanism 2 is located.

[0057] Among them, the fuel pipe grinding mechanism 3 includes: a polishing wheel fixing plate 5, a driving source 6, a polishing wheel 7, a polishing wheel pressing member 8 and a synchronization mechanism 9, the polishing wheel fixing plate 5 is arranged in the working chamber 4, the driving source 6 is fixedly arranged on the outer wall of the polishing wheel fixing plate 5, the polishing wheel 7 is arranged on one side of the polishing wheel fixing plate 5, and is rotatably connected to the output end of the driving source 6, so that it has the ability to rotate around the axis of the driving source 6, the polishing wheel pressing member 8 is arranged on the other opposite side of the polishing wheel fixing plate 5, one end of the synchronization mechanism 9 is rotatably connected to the polishing wheel 7, and the other opposite end of the synchronization mechanism 9 is rotatably connected to the rotating roller 10 in the polishing wheel pressing member 8, and an adjustment plate 11 is arranged between the rotating roller 10 and the polishing wheel fixing plate 5.

[0058] For example, one end of the adjustment plate 11 is fixedly connected to the roller surface in the rotating drum 10, and the other opposite end of the adjustment plate 11 is fixedly connected to the polishing wheel fixing plate 5, so that the above-mentioned polishing wheel 7 has the ability to swing along the axis of the rotating drum 10 to adapt to fuel pipes of different diameters or adjust the polishing pressure.

[0059] In the present embodiment, on the one hand, by arranging both the fuel pipe positioning mechanism 2 and the fuel pipe polishing mechanism 3 in the working chamber 4 and locating the polishing mechanism above the positioning mechanism, rational use of space and linearization of the work process are achieved, and by directly connecting the driving source 6 to the polishing wheel 7, stable power can be provided for the polishing operation, thereby ensuring the continuity and uniformity of the polishing process.

[0060] On the other hand, the design of the adjustment plate 11 can allow the polishing wheel 7 to swing according to the axis of the rotating drum 10, allowing the equipment to adapt to fuel pipes of different diameters, thereby increasing the versatility and flexibility of the equipment. At the same time, the polishing wheel pressing member 8 cooperates with the synchronization mechanism 9 and the adjustment plate 11 to achieve precise adjustment of the pressure of the polishing wheel 7, which is crucial to ensure the polishing quality of the inner surface of the fuel pipe and prevents uneven polishing or damage caused by excessive or insufficient pressure.

[0061] Specifically, the polishing device is adapted to fuel pipes of different diameters mainly through the design of its adjustment plate 11 .

[0062] Among them, the synchronizing mechanism 9 is first connected to the polishing wheel 7 at one end and connected to the rotating drum 10 in the polishing wheel pressing member 8 at the other end, so that the polishing wheel 7 and the pressing member move in a coordinated manner, and then fixed to the rotating drum 10 at one end and the adjusting plate 11 of the polishing wheel fixing plate 5 at the other end. When it is necessary to polish fuel pipes of different diameters, the operator can change the angle of the adjusting plate 11 by adjusting the position of the rotating drum 10, so that the polishing wheel 7 is close to or away from the central axis of the fuel pipe, and the polishing wheel 7 is fine-tuned in the direction perpendicular to the axis of the fuel pipe, thereby adapting to fuel pipes of different diameters. (For example, for fuel pipes with larger diameters, it may be necessary to move the polishing wheel 7 closer to the central axis to increase the pressure; for fuel pipes with smaller diameters, it may be necessary to reduce the pressure to avoid damaging the pipe surface.)

[0063] Reference Figure 4 In one embodiment, the polishing wheel pressing member 8 includes: a pressing member body 12, a positioning and adjusting mechanism 13, a first positioning and mounting portion 14, and a second positioning and mounting portion 15. The pressing member body 12 is fixedly arranged in the working chamber 4, and the first positioning and mounting portion 14 is arranged on one side of the pressing member body 12. The rotating drum 10 is fixedly connected to the lower end of the first positioning and mounting portion 14 and is rotationally connected to the synchronous pulley in the synchronization mechanism 9. The second positioning and mounting portion 15 is arranged on the other opposite side of the pressing member body 12 and partially axially passes through the window portion 16 opened in the adjustment plate 11. The positioning and adjusting mechanism 13 is fixedly connected to the second positioning and mounting portion 15, and is pin-connected to the side ear plate 17 provided on the outside of the above-mentioned window portion 16.

[0064] Among them, the positioning and adjustment mechanism 13 includes: a lifting motor 18, an adjusting screw 19 and a ball bearing 20. The lifting motor 18 is fixedly arranged on a motor fixing plate 21 below the adjustment plate 11, and is fixedly connected between the motor fixing plate 21 and the lower pressure member body 12 through a positioning member 22. The adjusting screw 19 is transmission connected to the output end of the lifting motor 18, and can partially axially pass through the above-mentioned window portion 16 to be connected to the ear plate at the upper end of the second positioning mounting portion 15. The ball bearing 20 is clamped in a U-shaped platform 23 in the middle of the second positioning mounting portion 15, and is pin-connected to the side ear plate 17 provided on the outer side of the window portion 16, providing a low-friction contact point to achieve smoother and more precise vertical adjustment of the U-shaped platform 23.

[0065] In this embodiment, when the lifting motor 18 is started, the rotary motion can be converted into linear motion through the transmission connection with the adjusting screw 19. Since the adjusting screw 19 is connected to the inner ear plate of the upper end of the second positioning and mounting part 15, this linear motion causes the U-shaped platform 23 in the middle of the second positioning and mounting part 15 to move up and down, and the linear motion is simultaneously transmitted to the rotating drum 10 connected to the U-shaped platform 23 through the cooperation between the ball bearing 20 and the adjustment plate 11, thereby realizing the precise adjustment of the downward pressure of the polishing wheel 7.

[0066] At the same time, since the pressing member body 12 and the first positioning and mounting portion 14 remain stationary, the stability of the entire system is guaranteed, thereby ensuring the continuity and uniformity of the polishing process.

[0067] Reference Figure 5 In one embodiment, it also includes: an inclination angle adjustment portion 24, and the inclination angle adjustment portion 24 is fixedly arranged between the first positioning and mounting portion 14 and the polishing wheel fixing plate 5.

[0068] Among them, the inclination angle adjustment part 24 includes: a first hinge part 25, a fisheye connecting rod 26 and a hinge shaft 27, the hinge shaft 27 is fixedly arranged in the middle of the first positioning mounting part 14 and is located above the rotating drum 10, the first hinge part 25 is fixedly arranged on the polishing wheel fixing plate 5, and the fisheye connecting rod 26 is located between the hinge shaft 27 and the first hinge part 25.

[0069] Furthermore, the adjustment plate 11 and the polishing wheel fixing plate 5 are hingedly connected via a second hinge portion 28 .

[0070] In this embodiment, being able to adjust the inclination angle of the polishing wheel 7 means that the contact surface and pressure distribution during the polishing process can be better controlled, thereby obtaining a more uniform and smooth polishing effect, and by optimizing the polishing angle, unnecessary pressure on the equipment during the polishing process can be reduced, thereby extending the service life of the equipment.

[0071] At the same time, the design of the second hinged portion 28 makes the connection between the adjustment plate 11 and the polishing wheel fixing plate 5 more flexible, which facilitates rapid positioning to a desired angle and improves work efficiency.

[0072] Reference Figure 5-6In one embodiment, the fuel pipe positioning mechanism 2 includes: a three-jaw chuck 29, a positioning tail stock 30 and a fuel pipe positioning seat 32, the three-jaw chuck 29 is fixedly arranged on one side of the working chamber 4, the positioning tail stock 30 is fixedly arranged on the other opposite side of the working chamber 4, and a conical positioning portion 31 is arranged on one side of the positioning tail stock 30 close to the three-jaw chuck 29, the fuel pipe positioning seat 32 is arranged between the positioning tail stock 30 and the three-jaw chuck 29, and a fuel pipe positioning chuck 33 is detachably mounted on the fuel pipe positioning seat 32.

[0073] The fuel pipe positioning chuck 33 at least includes: a first positioning chuck 34 and a second positioning chuck 35. The first positioning chuck 34 and the second positioning chuck 35 are both arranged on the fuel pipe positioning seat 32 through a guide installation groove 36. The second positioning chuck 35 and the first positioning chuck 34 are arranged to project each other.

[0074] In this embodiment, on the one hand, the stability of the fuel pipe positioning seat 32 is ensured by the fixed arrangement of the three-jaw chuck 29 and the positioning tailstock 30, so that the fuel pipe positioning chuck 33 can accurately position the fuel pipe, thereby reducing the time consumption during the installation of the fuel pipe through the accurate and easy-to-operate positioning mechanism, and improving the overall work efficiency. At the same time, the positioning tailstock 30 and the three-jaw chuck 29 are fixedly arranged on both sides of the working chamber 4, further enhancing the stability of the entire fuel pipe positioning mechanism 2, thereby maintaining the robustness of the equipment during operation. The three-jaw chuck 29 provides a stable support point for the fuel pipe, and the conical positioning portion 31 helps guide the fuel pipe to the correct positioning position.

[0075] On the other hand, the fuel pipe positioning clamp 33 can be detachably mounted on the fuel pipe positioning seat 32, which makes the installation and replacement of the fuel pipe faster and more convenient. At the same time, the guide installation groove design of the first positioning clamp 34 and the second positioning clamp 35 simplifies the movement and adjustment of the clamps, and because the second positioning clamp 35 and the first positioning clamp 34 are arranged in a mutually projecting manner, this symmetrical layout enables the positioning mechanism to adapt to fuel pipes of different diameters or shapes, providing better adaptability and flexibility.

[0076] Reference Figure 7 In one embodiment, a height adjustment mechanism 37 is provided between the upper top surface of the working chamber and the fuel pipe grinding mechanism.

[0077] The height adjustment mechanism 37 is specifically arranged in a scissor-fork structure. The scissor-fork structure is a prior art for those skilled in the art and will not be elaborated on in detail.

[0078] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fuel pipe polishing device, comprising: A polishing device body (1), a fuel pipe positioning mechanism (2) and a fuel pipe grinding mechanism (3), wherein a working chamber (4) is provided in the polishing device body (1), the fuel pipe positioning mechanism (2) and the fuel pipe grinding mechanism (3) are both fixedly arranged in the working chamber (4), and the plane where the fuel pipe grinding mechanism (3) is located is higher than the plane where the fuel pipe positioning mechanism (2) is located; The feature is that the fuel pipe grinding mechanism (3) comprises: A polishing wheel fixing plate (5) is arranged in the working chamber (4); A driving source (6) is fixedly mounted on the outer wall of the polishing wheel fixing plate (5); A polishing wheel (7) is arranged on one side of the polishing wheel fixing plate (5) and is rotatably connected to the output end of the driving source (6) so as to be capable of rotating around the axis of the driving source (6); A polishing wheel pressing member (8) is arranged on the other opposite side of the polishing wheel fixing plate (5); and a synchronization mechanism (9), one end of the synchronization mechanism (9) being rotationally connected to the polishing wheel (7), and the other opposite end being rotationally connected to a rotating drum (10) in the polishing wheel pressing member (8), and an adjustment plate (11) being provided between the rotating drum (10) and the polishing wheel fixing plate (5); One end of the adjustment plate (11) is fixedly connected to the roller surface in the rotating drum (10), while the other opposite end of the adjustment plate (11) is fixedly connected to the polishing wheel fixing plate (5), so that it has the ability to swing along the axis of the rotating drum (10).

2. A fuel pipe polishing device according to claim 1, characterized in that: The polishing wheel pressing member (8) comprises: A lower pressing member body (12) is fixedly disposed in the working chamber (4); A first positioning and mounting portion (14) is arranged on one side of the lower pressing member body (12), and the rotating drum (10) is fixedly arranged at the lower end of the first positioning and mounting portion (14); A second positioning and mounting portion (15) is disposed on the other opposite side of the lower pressing member body (12) and partially axially passes through a window portion (16) provided in the adjustment plate (11); And a positioning adjustment mechanism (13) is fixedly arranged on one side of the second positioning installation portion (15) and is pin-connected to a side ear plate (17) provided on the outside of the window portion (16).

3. A fuel pipe polishing device according to claim 2, characterized in that: The positioning adjustment mechanism (13) comprises: A lifting motor (18) is fixedly arranged below the adjustment plate (11); An adjusting screw rod (19) is drivingly connected to the output end of the lifting motor (18) and can partially axially pass through the above-mentioned window portion (16) to be connected to the ear plate at the upper end of the second positioning mounting portion (15); and a ball bearing (20), the ball bearing (20) being clamped in a U-shaped platform (23) in the middle of the second positioning and mounting portion (15) and being pin-connected to a side ear plate (17) provided on the outside of the window portion (16), so as to provide a low-friction contact point for the U-shaped platform (23) to achieve vertical adjustment more smoothly and accurately.

4. A fuel pipe polishing device according to claim 1, characterized in that: Also includes: An inclination angle adjusting portion (24) for adjusting the inclination angle of the polishing wheel fixing plate (5); The tilt angle adjustment portion (24) comprises: A hinge shaft (27) is located between the polishing wheel pressing member (8) and the polishing wheel fixing plate (5), and is located above the rotating drum (10); A first hinged portion (25) fixedly disposed on the polishing wheel fixing plate (5); and a fisheye connecting rod (26) arranged between the hinge shaft (27) and the first hinge part (25).

5. A fuel pipe polishing device according to claim 4, characterized in that: A second hinged portion (28) is hingedly connected between the adjustment plate (11) and the polishing wheel fixing plate (5).

6. A fuel pipe polishing device according to claim 1, characterized in that: The fuel pipe positioning mechanism (2) comprises: A three-jaw chuck (29) is fixedly arranged on one side of the working chamber (4); And a positioning tailstock (30) is fixedly arranged on the other opposite side of the working chamber (4), and a conical positioning portion (31) is arranged on one side of the positioning tailstock (30) close to the three-jaw chuck (29).

7. A fuel pipe polishing device according to claim 6, characterized in that: The fuel pipe positioning mechanism (2) further comprises: A fuel pipe positioning seat (32) is arranged between the positioning tail seat (30) and the three-jaw chuck (29); And a fuel pipe positioning clamp (33) is detachably mounted on the fuel pipe positioning seat (32).

8. A fuel pipe polishing device according to claim 7, characterized in that: The fuel pipe positioning clamp (33) at least comprises: a first positioning clamp (34) and a second positioning clamp (35); the first positioning clamp (34) and the second positioning clamp (35) are both arranged on the fuel pipe positioning seat (32) via a guide mounting groove (36); the second positioning clamp (35) and the first positioning clamp (34) are arranged to project onto each other.

9. A fuel pipe polishing device according to claim 1, characterized in that: A height adjustment mechanism (37) is provided between the upper top surface of the working chamber (4) and the fuel pipe grinding mechanism (3).

10. A fuel pipe polishing device according to claim 9, characterized in that: The height adjustment mechanism (37) is specifically arranged in a scissor-type structure.

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