An adaptive cylindrical grinding device for shaft parts

Abstract

This invention discloses an adaptive outer diameter grinding device for shaft parts, relating to the field of shaft part processing technology. It includes a grinding table, a control panel, a grinding mechanism mounted on the top of the grinding table, an L-shaped fixing plate, an elastic mechanism mounted on the L-shaped fixing plate, a support positioning frame, and a pushing mechanism mounted on the grinding table. A second motor in the grinding mechanism drives a moving frame to move along a guide groove. The moving frame drives the grinding wheel to move synchronously closer to the shaft part, thus adapting to shaft parts with different outer diameters. The grinding wheel acts on the elastic unit and makes it contact a pressure sensor. The pressure sensor detects and transmits the information to the control panel, achieving precise control of the grinding pressure, preventing over-grinding or incomplete grinding, and improving grinding accuracy and part processing quality.

Description

Technical Field

[0001] This invention relates to the field of shaft parts processing technology, and in particular to an adaptive external cylindrical grinding device for shaft parts. Background Technology

[0002] Shafts, as indispensable core components of mechanical equipment, are widely used in numerous industrial fields such as mining machinery, automobile manufacturing, and aerospace equipment. These parts primarily play a crucial role in torque power transmission, rotational motion support, and the positioning and installation of transmission components. Their overall service condition directly determines the operational reliability of the machinery. The outer diameter of the shaft is the core mating and stress-bearing surface; its dimensional accuracy and surface quality significantly affect the overall machine's operational stability, transmission efficiency, and long-term service life. In the outer diameter machining process, grinding and finishing are the core critical steps. This effectively removes machining marks, burrs, impurities, and high-temperature oxide layers from the part's surface, precisely reducing surface roughness and further enhancing the shaft's wear resistance and fatigue resistance. This ensures subsequent assembly accuracy and meets the requirements of high-intensity, long-term stable operation of the equipment.

[0003] However, current shaft external cylindrical grinding devices are difficult to adapt to shaft parts with large outer diameters, and the grinding pressure cannot be precisely controlled during the grinding process, which can easily lead to over-grinding or incomplete grinding, seriously affecting the grinding accuracy and the quality of the parts. Therefore, improvements are urgently needed. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an adaptive outer diameter grinding device for shaft parts, which aims to solve the technical problems that the existing shaft outer diameter grinding devices are difficult to adapt to shaft parts with large outer diameters and cannot accurately control the grinding pressure during the grinding process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an adaptive external cylindrical grinding device for shaft-type parts, comprising a grinding table, including: a control panel fixedly disposed on the surface of the grinding table; a grinding mechanism disposed on the top of the grinding table; three L-shaped fixing plates evenly disposed circumferentially on the grinding table; an elastic mechanism disposed on the L-shaped fixing plates; a support positioning frame disposed on the elastic mechanism and slidably connected to the L-shaped fixing plates; and a pushing mechanism disposed on the grinding table.

[0006] Preferably, the polishing mechanism includes: a first motor, fixedly mounted on the top of the polishing table and electrically connected to the control panel; a first rotating roller, rotatably mounted on the polishing table, with one end fixedly connected to the output end of the first motor; a turntable, fixedly mounted on the other end of the first rotating roller; a guide groove, formed at the bottom of the turntable; and a moving component, mounted on the turntable.

[0007] Preferably, the moving component includes: a second motor, mounted on the turntable and fixedly connected to the turntable, and electrically connected to the control panel; a drive screw, rotatably mounted on the turntable, with one end fixedly connected to the output end of the second motor; a threaded sleeve, mounted on the drive screw and threadedly connected to the drive screw; a moving frame, fixedly mounted on the threaded sleeve and slidably connected to the turntable; a T-shaped groove, formed on the moving frame; a pressure sensor, mounted in the T-shaped groove, fixedly connected to the moving frame, and electrically connected to the control panel; and an elastic unit, mounted on the moving frame.

[0008] Preferably, the elastic unit includes: two first springs, which are disposed in a T-shaped groove and one end is fixedly connected to the movable frame; a π-shaped frame, which is slidably disposed on the movable frame and fixedly connected to the other end of the first springs; and a grinding component disposed on the π-shaped frame.

[0009] Preferably, the grinding component includes: a third motor, fixedly mounted on the π-shaped frame and electrically connected to the control panel; a second rotating roller, rotatably mounted on the π-shaped frame, with one end fixedly connected to the output end of the third motor; and a grinding wheel, mounted on the second rotating roller and fixedly connected to the second rotating roller.

[0010] Preferably, an annular guide rail is fixedly provided at the top of the grinding table, and the annular guide rail is slidably connected to the turntable.

[0011] Preferably, the elastic mechanism includes: a second spring, disposed within the L-shaped fixed plate, with one end fixedly connected to the L-shaped fixed plate; a sliding plate, slidably disposed within the L-shaped fixed plate, and fixedly connected to the other end of the second spring; and a connecting rod, disposed on the sliding plate, with one end fixedly connected to the sliding plate and the other end fixedly connected to the support positioning frame.

[0012] Preferably, the end of the support positioning frame near the pushing mechanism has an inclined structure.

[0013] Preferably, the pushing mechanism includes: a hydraulic cylinder, fixedly mounted on the grinding table and electrically connected to the control panel; a three-way extending push plate, fixedly mounted on the output end of the hydraulic cylinder; and three guide rods, which are fixedly mounted on the bottom end of the three-way extending push plate and slidably connected to the grinding table.

[0014] Preferably, the three-way extending push plate has three upward pushing ends distributed at 120° equidistant angles, and the edge of the end face of each upward pushing end is set as a bevel structure.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The second motor in the grinding mechanism drives the moving frame to move along the guide slide. The moving frame drives the grinding wheel to move synchronously and approach the shaft parts, thereby adapting to shaft parts with different outer diameters. The grinding wheel acts on the elastic unit and makes it contact the pressure sensor. The pressure sensor detects and transmits the information to the control panel, which can accurately control the grinding pressure, prevent over-grinding or incomplete grinding, and improve grinding accuracy and part processing quality.

[0016] 2. Through the cooperation between the elastic mechanism, the support positioning frame and the pushing mechanism, the pushing mechanism moves upward along the inclined surface at the bottom of the support positioning frame and pushes the three support positioning frames to move. The support positioning frames act on the elastic mechanism and store elastic potential energy. The three moving support positioning frames clamp and position the parts from inside the shaft parts, which is suitable for shaft parts with different inner diameters. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural schematic diagram of an adaptive external cylindrical grinding device for shaft-type parts is shown.

[0019] Figure 2 It shows Figure 1 Side view sectional view.

[0020] Figure 3 It shows Figure 1 A frontal sectional view.

[0021] Figure 4 It shows Figure 3 A magnified view of a portion of point A in the middle.

[0022] Figure 5 A three-dimensional structural diagram of the polishing mechanism is shown.

[0023] Figure 6 It shows Figure 5 An explosion diagram.

[0024] Figure 7 An exploded view of the L-shaped fixing plate, the elastic mechanism, and the support positioning frame is shown.

[0025] Figure 8 A three-dimensional structural diagram of the actuation mechanism is shown.

[0026] Legend: 1. Grinding table; 2. Control panel; 3. L-shaped fixing plate; 4. Support positioning frame; 5. First motor; 6. First rotating roller; 7. Turntable; 8. Guide slide; 9. Second motor; 10. Drive screw; 11. Threaded sleeve; 12. Moving frame; 13. T-shaped slide; 14. Pressure sensor; 15. First spring; 16. π-shaped frame; 17. Third motor; 18. Second rotating roller; 19. Grinding wheel; 20. Circular guide rail; 21. Second spring; 22. Slide plate; 23. Connecting rod; 24. Hydraulic cylinder; 25. Three-way extension push plate; 26. Guide rod. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0029] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Reference Figures 1 to 8An embodiment of the adaptive external cylindrical grinding device for shaft-type parts according to the present invention will be further described.

[0032] An adaptive external cylindrical grinding device for shaft-type parts includes a grinding table 1, comprising: Control panel 2 is fixedly mounted on the surface of grinding table 1; it is used to control the start and stop of the first motor 5, the second motor 9, the third motor 17 and the hydraulic cylinder 24, and also has forward and reverse switching and reverse drive adjustment functions, and is used to receive pressure information detected by pressure sensor 14. Reference Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 In a preferred embodiment, a polishing mechanism is disposed at the top of the polishing table 1; the polishing mechanism includes: The first motor 5 is fixedly mounted on the top of the grinding table 1 and electrically connected to the control panel 2; The first rotating roller 6 is rotatably mounted on the grinding table 1, and one end is fixedly connected to the output end of the first motor 5; Turntable 7 is fixedly installed at the other end of the first rotating roller 6; A ring-shaped guide rail 20 is fixedly provided at the top of the grinding table 1, and the ring-shaped guide rail 20 is slidably connected to the turntable 7.

[0033] During operation, the first motor 5 is started via the control panel 2. The first motor 5 drives the first roller 6, which is fixedly connected to its output end, to rotate. The first roller 6 drives the turntable 7 to rotate along the annular guide rail 20. The annular guide rail 20 provides support and guidance for one end of the turntable 7, ensuring the stability of the turntable 7's rotation. The turntable 7 is used to drive the moving component to rotate, thereby driving the grinding wheel 19 in the moving component to rotate along the outer ring of the shaft-like part. Reference Figure 3 , Figure 5 and Figure 6 In a preferred embodiment, the guide groove 8 is provided at the bottom of the turntable 7 to provide guidance for the movement of the movable frame 12. A movable component, mounted on turntable 7, includes: The second motor 9 is mounted on the turntable 7, fixedly connected to the turntable 7, and electrically connected to the control panel 2; The drive screw 10 is rotatably mounted on the turntable 7, and one end is fixedly connected to the output end of the second motor 9; A threaded sleeve 11 is disposed on the drive screw 10 and is threadedly connected to the drive screw 10; The movable frame 12 is fixedly mounted on the threaded sleeve 11 and slidably connected to the turntable 7; During operation, the second motor 9 is started via the control panel 2. The second motor 9 drives the drive screw 10, which is fixedly connected to its output end, to rotate. The drive screw 10 drives the threaded sleeve 11 to move. The threaded sleeve 11 drives the moving frame 12 to slide along the guide groove 8 on the turntable 7. The moving frame 12 is used to drive the elastic mechanism and the pressure sensor 14 to move synchronously, thereby driving the grinding wheel 19 in the elastic mechanism to move synchronously and contact the outer ring of the shaft parts, thus adapting to shaft parts of different diameters. Reference Figure 4 In a preferred embodiment, the T-shaped groove 13 is formed on the movable frame 12; Pressure sensor 14 is set in T-shaped slide groove 13, fixedly connected to moving frame 12, and electrically connected to control panel 2. It is used to receive the pressure exerted on pressure sensor 14 by π-shaped frame 16 in real time and transmit the pressure information to control panel 2. The elastic unit is disposed on the movable frame 12, and the elastic unit includes: Two first springs 15 are provided. The two first springs 15 are set in the T-shaped slide groove 13 and one end is fixedly connected to the moving frame 12. They are used to provide elastic potential energy to separate the π-shaped frame 16 and the pressure sensor 14. The π-shaped frame 16 is slidably mounted on the movable frame 12 and is fixedly connected to the other end of the first spring 15; During operation, after the grinding wheel 19 in the grinding component contacts the outer ring of the shaft part, the position of the π-shaped frame 16 is locked. Meanwhile, the moving frame 12 continues to move, acting on the first spring 15 and causing it to compress. This compresses the first spring 15, allowing it to store elastic potential energy until the π-shaped frame 16 contacts the pressure sensor 14 and finally acts on it. During this process, the pressure sensor 14 transmits the detected pressure information to the control panel 2 in real time, achieving precise control of the grinding pressure. After grinding is completed, the second motor 9 is started through the control panel 2. The second motor 9 drives the moving frame 12 to move in the opposite direction. At this time, the first spring 15 releases its elastic potential energy, causing the π-shaped frame 16 to move away from the pressure sensor 14, preparing for the next application to shaft parts with different outer diameters. Reference Figure 1 , Figure 4 , Figure 5 and Figure 6 In a preferred embodiment, the grinding component is disposed on the π-shaped frame 16, and the grinding component includes: The third motor 17 is fixedly mounted on the π-shaped frame 16 and electrically connected to the control panel 2; The second roller 18 is rotatably mounted on the π-shaped frame 16, and one end is fixedly connected to the output end of the third motor 17; The grinding wheel 19 is mounted on the second rotating roller 18 and is fixedly connected to the second rotating roller 18.

[0034] During operation, the third motor 17 is started via the control panel 2. The third motor 17 drives the second rotating roller 18, which is fixedly connected to its output end, to rotate. The second rotating roller 18 drives the grinding wheel 19 to rotate. The grinding wheel 19 grinds the outer ring of the shaft part. In conjunction with the turntable 7, the grinding wheel 19 rotates along the outer ring of the shaft part, and finally grinds the outer ring of the shaft part. Reference Figure 2 and Figure 7 As a preferred embodiment, three L-shaped fixing plates 3 are provided. The three L-shaped fixing plates 3 are evenly arranged on the grinding table 1 in a circumferential direction to provide a limiting activity space for the compression and release action of the second spring 21, while constraining and limiting the linear movement trajectory of the slide plate 22. An elastic mechanism is mounted on the L-shaped fixed plate 3. The elastic mechanism includes: The second spring 21 is disposed inside the L-shaped fixing plate 3, and one end is fixedly connected to the L-shaped fixing plate 3; The slide plate 22 is slidably disposed within the L-shaped fixed plate 3 and is fixedly connected to the other end of the second spring 21; The connecting rod 23 is set on the slide plate 22, with one end fixedly connected to the slide plate 22 and the other end fixedly connected to the support positioning frame 4.

[0035] The support positioning frame 4 is mounted on the elastic mechanism and is slidably connected to the L-shaped fixed plate 3. The end of the support positioning frame 4 near the pushing mechanism has an inclined structure.

[0036] During operation, the second spring 21 releases elastic potential energy to push the slide plate 22 to move within the L-shaped fixed plate 3. The slide plate 22 drives the connecting rod 23 to move synchronously, and the connecting rod 23 drives the support positioning frame 4 to move synchronously, so that the three support positioning frames 4 are close to the center of the grinding table 1, in preparation for the next operation of the pushing mechanism. Reference Figure 3 and Figure 8 In a preferred embodiment, a pushing mechanism is disposed on the grinding table 1, and the pushing mechanism includes: Hydraulic cylinder 24 is fixedly mounted on grinding table 1 and electrically connected to control panel 2; The three-way extension push plate 25 is fixedly installed at the output end of the hydraulic cylinder 24; The three-way extension push plate 25 has three push ends that are equally spaced at 120°, and the edge of the end face of each push end is set as a bevel structure.

[0037] There are three guide rods 26. The three guide rods 26 are fixedly installed at the bottom end of the three-way extension push plate 25 and are slidably connected to the grinding table 1.

[0038] During operation, the hydraulic cylinder 24 is activated via the control panel 2. The hydraulic cylinder 24 drives the three-way extension push plate 25 to move upward. The guide rod 26 ensures the stability of the three-way extension push plate 25 as it moves up and down. The inclined surface of the three-way extension push plate 25 moves upward along the inclined surface at the bottom of the support positioning frame 4. During the upward movement of the three-way extension push plate 25, it pushes the support positioning frame 4 to move along the direction of the first spring 15. The support positioning frame 4 drives the connecting rod 23 to move synchronously. The connecting rod 23 drives the sliding plate 22 to move synchronously. During this process, the sliding plate 22 compresses the first spring 15 and stores elastic potential energy until the three support positioning frames 4 are in close contact with the inner ring of the shaft parts, thereby fixing shaft parts with different inner diameters and preventing the shaft parts from loosening during the grinding process.

[0039] Working principle: The hydraulic cylinder 24 is activated via the control panel 2. The hydraulic cylinder 24 drives the three-way extension push plate 25 upwards. The inclined surface at the end of the three-way extension push plate 25 moves upwards along the inclined surface at the bottom of the support positioning frame 4. During this upward movement, the three-way extension push plate 25 pushes the support positioning frame 4 towards the first spring 15. The support positioning frame 4 drives the connecting rod 23 to move synchronously, and the connecting rod 23 drives the sliding plate 22 to move synchronously. During this process, the sliding plate 22 compresses the first spring 15 and stores elastic potential energy until the support positioning frame 4 and the shaft... The inner rings of the parts fit tightly together, thus fixing shaft parts with different inner diameters. Then, the first motor 5 is started through the control panel 2. The first motor 5 drives the first roller 6, which is fixedly connected to its output end, to rotate. The first roller 6 drives the turntable 7 to rotate along the annular guide rail 20. The turntable 7 drives the movable frame 12 to rotate synchronously. The movable frame 12 drives the π-shaped frame 16 to rotate synchronously. The π-shaped frame 16 drives the grinding wheel 19 to rotate synchronously through the second roller 18, so that the grinding wheel 19 rotates along the outer ring of the shaft part, realizing the grinding of the outer ring of the shaft part. When it is necessary to adapt to shaft parts with different outer diameters, the second motor 9 is started through the control panel 2. The second motor 9 drives the drive screw 10, which is fixedly connected to its output end, to rotate. The drive screw 10 drives the threaded sleeve 11 to move. The threaded sleeve 11 drives the moving frame 12 to slide along the guide groove 8 on the turntable 7. The moving frame 12 drives the elastic mechanism and the pressure sensor 14 to move synchronously, thereby driving the grinding wheel 19 in the elastic mechanism to contact shaft parts with different outer diameters, thus adapting to shaft parts with different outer diameters. Then the moving frame 12 continues to move and acts on the first spring 15. The moving frame 12 compresses the first spring 15, causing the first spring 15 to store elastic potential energy until it contacts the π-shaped frame 16. At this time, the π-shaped frame 16 acts on the pressure sensor 14. The pressure sensor 14 transmits the detected pressure information to the control panel 2 in real time. Then the second motor 9 is turned off to stop the movement of the moving frame 12, thereby achieving precise control of the grinding pressure. Finally, the third motor 17 is started via the control panel 2. The third motor 17 drives the second roller 18, which is fixedly connected to its output end, to rotate. The second roller 18 drives the grinding wheel 19 to rotate. The high-speed rotating grinding wheel 19 grinds the outer ring of the shaft parts. After grinding, the second motor 9 is started via the control panel 2 to drive the moving frame 12 to move in the opposite direction. At this time, the first spring 15 releases elastic potential energy to drive the π-shaped frame 16 away from the pressure sensor 14. Then, the hydraulic cylinder 24 is started via the control panel 2. The hydraulic cylinder 24 drives the three-way extension push plate 25 to descend. At this time, the second spring 21 releases elastic potential energy to push the slide plate 22 to move within the L-shaped fixed plate 3. The slide plate 22 drives the connecting rod 23 to move synchronously. The connecting rod 23 drives the support positioning frame 4 to move synchronously, so that the three support positioning frames 4 are close to the center of the grinding table 1, preparing for the next operation of the pushing mechanism.

[0040] The above description of the embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adaptive external cylindrical grinding device for shaft-type parts, comprising a grinding table (1), characterized in that, include: The control panel (2) is fixedly installed on the surface of the polishing table (1); A polishing mechanism is located at the top of the polishing table (1); There are three L-shaped fixing plates (3), and the three L-shaped fixing plates (3) are evenly arranged on the grinding table (1) in a circumferential direction; An elastic mechanism is provided on the L-shaped fixing plate (3); The support positioning frame (4) is mounted on the elastic mechanism and is slidably connected to the L-shaped fixing plate (3); The driving mechanism is located on the polishing table (1).

2. The adaptive external cylindrical grinding device for shaft-type parts according to claim 1, characterized in that, The polishing mechanism includes: The first motor (5) is fixedly installed on the top of the grinding table (1) and electrically connected to the control panel (2); The first rotating roller (6) is rotatably mounted on the grinding table (1), and one end is fixedly connected to the output end of the first motor (5); The turntable (7) is fixedly installed at the other end of the first roller (6); A guide groove (8) is provided at the bottom end of the turntable (7); The moving component is mounted on the turntable (7).

3. The adaptive external cylindrical grinding device for shaft-type parts according to claim 2, characterized in that, The moving component includes: The second motor (9) is mounted on the turntable (7), fixedly connected to the turntable (7), and electrically connected to the control panel (2); The drive screw (10) is rotatably mounted on the turntable (7), and one end is fixedly connected to the output end of the second motor (9); A threaded sleeve (11) is disposed on the drive screw (10) and threadedly connected to the drive screw (10); The movable frame (12) is fixedly mounted on the threaded sleeve (11) and slidably connected to the turntable (7); T-shaped groove (13) is provided on the movable frame (12); The pressure sensor (14) is disposed in the T-shaped groove (13), fixedly connected to the movable frame (12), and electrically connected to the control panel (2); The elastic unit is disposed on the movable frame (12).

4. The adaptive external cylindrical grinding device for shaft-type parts according to claim 3, characterized in that, The elastic unit includes: Two first springs (15) are provided, and the two first springs (15) are set in the T-shaped groove (13), and one end is fixedly connected to the movable frame (12); A π-shaped frame (16) is slidably mounted on the movable frame (12) and fixedly connected to the other end of the first spring (15); The grinding component is mounted on the π-shaped frame (16).

5. The adaptive external cylindrical grinding device for shaft-type parts according to claim 4, characterized in that, The grinding component includes: The third motor (17) is fixedly mounted on the π-shaped frame (16) and electrically connected to the control panel (2); The second roller (18) is rotatably mounted on the π-shaped frame (16), and one end is fixedly connected to the output end of the third motor (17); The grinding wheel (19) is disposed on the second rotating roller (18) and is fixedly connected to the second rotating roller (18).

6. The adaptive external cylindrical grinding device for shaft-type parts according to claim 5, characterized in that, The top of the grinding table (1) is fixedly provided with an annular guide rail (20), and the annular guide rail (20) is slidably connected to the turntable (7).

7. The adaptive external cylindrical grinding device for shaft-type parts according to claim 6, characterized in that, The elastic mechanism includes: The second spring (21) is disposed inside the L-shaped fixing plate (3), and one end is fixedly connected to the L-shaped fixing plate (3); The slide plate (22) is slidably disposed within the L-shaped fixed plate (3) and is fixedly connected to the other end of the second spring (21); A connecting rod (23) is set on the slide plate (22), with one end fixedly connected to the slide plate (22) and the other end fixedly connected to the support positioning frame (4).

8. The adaptive external cylindrical grinding device for shaft-type parts according to claim 7, characterized in that, The support positioning frame (4) has an inclined structure at one end near the pushing mechanism.

9. The adaptive external cylindrical grinding device for shaft-type parts according to claim 8, characterized in that, The propulsion mechanism includes: The hydraulic cylinder (24) is fixedly mounted on the grinding table (1) and electrically connected to the control panel (2); A three-way extension push plate (25) is fixedly installed at the output end of the hydraulic cylinder (24); There are three guide rods (26), which are fixedly installed at the bottom of the three-way extension push plate (25) and slidably connected to the grinding table (1).

10. The adaptive external cylindrical grinding device for shaft-type parts according to claim 9, characterized in that, The three-way extension push plate (25) has three push ends distributed at 120° equidistant angles, and the edge of the end face of each push end is set as a bevel structure.

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