A polishing device for the surface of an automotive variable-diameter rod

Abstract

The present invention relates to the field of automotive variable-diameter rods, and discloses a polishing device for the surface of automotive variable-diameter rods, including a base and a polishing wheel. The polishing wheel is arranged on the base through an alternating polishing structure. A blanking structure is arranged on the left side of the base, and storage structures are arranged on the front and rear sides above the base. The alternating polishing structure can drive the polishing wheel to move back and forth along the width direction of the base. At the same time, it will also drive the alternating feeding structure to alternately feed the variable-diameter rods stored on the two storage plates of the storage structure to the polishing position for polishing, saving a large amount of working time and improving work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive variable-diameter rods, and in particular to a polishing device for the surface of automotive variable-diameter rods. Background Art

[0002] An automotive variable-diameter rod is used to prevent the vehicle from rolling laterally and improve ride comfort. The lateral stabilizer bar is a torsion bar spring made of spring steel, shaped like a "U", and horizontally placed at the front and rear ends of the vehicle. In the middle of the rod body, it is hinged to the vehicle frame with a sleeve, and the two ends of the rod are respectively fixed on the lower control arms or shock absorber struts of the left and right suspensions to prevent the vehicle body from experiencing excessive lateral roll during turning. When processing an automotive variable-diameter rod, a polishing device is required for polishing work.

[0003] In the prior art polishing device, the variable-diameter rod to be polished is clamped and fixed by a clamping structure, and then a polishing wheel rotating at high speed is used to move along the length direction of the variable-diameter rod to perform the polishing process of the variable-diameter rod.

[0004] However, in the actual polishing process, it is necessary for workers to place the variable-diameter rod to be polished at the clamping structure for clamping and then perform polishing. After polishing, it is necessary to loosen the variable-diameter rod to remove the polished variable-diameter rod. This wastes a large amount of working time, and the working efficiency needs to be improved. Therefore, there is room for improvement. Summary of the Invention

[0005] In order to solve the problems raised in the above background art, the present invention provides a polishing device for the surface of automotive variable-diameter rods.

[0006] The polishing device for the surface of automotive variable-diameter rods provided by the present invention adopts the following technical solutions:

[0007] A polishing device for the surface of automotive variable-diameter rods includes a base and a polishing wheel. The polishing wheel is arranged on the base through an alternating polishing structure. A blanking structure is arranged on the left side of the base, and storage structures are arranged on both the front and rear sides above the base.

[0008] The alternating polishing structure includes a third groove opened in the middle of the upper surface of the base. At both ends of the front and rear side walls of the third groove, fixed rods are connected. A moving frame is movably sleeved on the two fixed rods. A moving seat is movably arranged in the moving frame. A first electric telescopic rod is installed on the right side surface of the moving frame. One end of the output shaft of the first electric telescopic rod is connected to the moving seat. A fixed column is connected at the upper surface of the moving seat. A guiding structure is arranged between the fixed column and the moving frame. A first motor is installed above the right side surface of the fixed column. One end of the output shaft of the first motor is installed with a polishing wheel. A shielding cover is arranged at the polishing wheel through a rotation limiting structure. Fixed strips are arranged at both ends of the outer arc surface of the shielding cover. A cylinder is installed in the middle of the front surface of the base. One end of the output shaft of the cylinder is connected to the moving frame;

[0009] An alternating feeding structure is arranged above the base, and a turning structure is arranged in the middle of the right side surface of the base;

[0010] The rotation limiting structure includes fixed blocks arranged at both ends of the left and right side surfaces of the shielding cover close to the two ends. The shielding cover is rotatably connected to the inner wall of the fixed column. Four limiting blocks are respectively arranged on the inner walls of the two sides of the fixed column.

[0011] Preferably, the storage structure includes support frames arranged at the front and rear side edges of the upper surface of the base. A storage plate is installed on the support frames. A switching structure is arranged between the two storage plates. The storage plates are arranged obliquely downward on the support frames towards the side of the moving frame. Shielding edges are arranged at both left and right side edges of the storage plates. L-shaped strips are connected at the positions of the upper surface of the base close to the two support frames.

[0012] Preferably, the alternating feeding structure includes arc-shaped seats installed at the left and right sides of the upper surface of the base. First chutes are opened on the mutually close side surfaces of the two arc-shaped seats. Slide bars are slidably arranged in the first chutes. Arc-shaped plates are installed on the slide bars. Cross plates are connected between the two ends of the two arc-shaped plates. A support plate is arranged on the cross plate through a connection structure. A first groove is opened on the side of the support plate close to the moving frame. A second driving strip is installed on the left side surface of the moving frame. Teeth that are meshed with each other are arranged on the upper surface of the second driving strip and the lower arc surface of the left arc-shaped plate.

[0013] Preferably, the connection structure includes vertical plates arranged at both sides of the upper surface of the cross plate. A first rotating shaft rotatably passes through the top openings of the vertical plates. A connecting block is fixedly sleeved on the first rotating shaft. The connecting block is connected to the support plate. A limiting frame is fixedly sleeved at the bottom end of the right vertical plate. A through groove is opened on the cross plate at the position below the right vertical plate. The bottom end of the right vertical plate is movably inserted into the through groove and is connected with a T-shaped plate. A spring is connected between the T-shaped plate and the bottom wall of the through groove. A fixing piece is installed at the bottom end of the T-shaped plate.

[0014] Preferably, the blanking structure includes a collection box disposed at the left edge of the upper surface of the base. The inner lower wall of the collection box is inclined towards the middle, and an inclined blanking plate is installed on the collection box.

[0015] Preferably, the switching structure includes a U-shaped frame connected to the left side positions of two storage plates. A fixing plate is connected to the middle of the inner lower wall of the U-shaped frame, and a second groove is provided at the left side of the upper surface of the fixing plate.

[0016] Preferably, the flipping structure includes a second rotating shaft rotatably connected to the middle of the right side surface of the base. A gear is fixedly sleeved on one end of the second rotating shaft, and a flipping plate is fixedly sleeved on the other end of the second rotating shaft. The flipping plate is in an "L" shape. A driving structure is provided between the second rotating shaft and the moving frame, and a pressing and rotating structure is provided on the flipping plate. A limiting seat is installed at the bottom end of the flipping plate on the upper surface of the base, and the limiting seat is in a "U" shape.

[0017] Preferably, the driving structure includes a connecting strip connected to the right side surface of the moving frame. One end of the connecting strip passing through the arc-shaped seat is connected to a first driving strip, and teeth meshing with the gear are provided on the first driving strip.

[0018] Preferably, the pressing and rotating structure includes a second mounting plate installed at the left end of the inner upper wall of the flipping plate. A second electric telescopic rod is installed on the second mounting plate, and a pressing disc is rotatably installed at one end of the output shaft of the second electric telescopic rod. A first mounting plate is installed at the right side of the inner upper wall of the flipping plate, and a second motor is installed on the first mounting plate. A turntable is installed at one end of the output shaft of the second motor.

[0019] Preferably, the guiding structure includes a horizontal strip installed above the front surface of the moving frame. A guiding groove is provided on the horizontal strip. A plug rod is connected to the lower part of the front surface of the fixed column, and the bottom end of the plug rod is movably inserted into the guiding groove. A sliding block is provided at the bottom end of the fixed column, and a second sliding groove for the sliding block to slide is provided on the upper surface of the moving seat.

[0020] In summary, the present invention includes the following beneficial technical effects:

[0021] 1. By providing an alternating polishing structure, a storage structure, and an alternating feeding structure, the present invention can drive the polishing wheel to move back and forth along the width direction of the base through the alternating polishing structure. At the same time, it can also drive the alternating feeding structure to alternately feed the stepped rods stored on the two storage plates of the storage structure to the polishing position for polishing, which greatly saves working time and improves work efficiency.

[0022] 2. The present invention is provided with a connection structure and a blanking structure. As the polishing wheels on the alternating polishing structure alternately switch the polishing positions, the polished stepped rods can be automatically blanked into the blanking structure through the connection structure for blanking, so as to further rationally utilize the working time and improve the working efficiency.

[0023] 3. The present invention is provided with a flipping structure, a driving structure and a pressing and rotating structure. When the moving frame on the alternating polishing structure moves back and forth, the pressing and rotating structure can be automatically switched to the polishing position through the driving structure and the flipping structure to perform the pressing and rotating polishing work on the stepped rod. In this way, the pressing and rotating structure can be freely switched to two polishing positions for polishing work, which not only reduces the manufacturing cost but also improves the working efficiency.

[0024] 4. The present invention is provided with a shielding cover, a rotation limiting structure and a switching structure. When the moving frame moves, the position of the shielding cover can be automatically switched, so that the shielding cover can block the debris generated during the polishing process at both polishing positions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of a polishing device for the surface of an automotive stepped rod in an embodiment of the present invention;

[0026] Figure 2 is in an embodiment of the present invention Figure 1 an enlarged view of the structure at A;

[0027] Figure 3 is a schematic structural diagram of the base blanking structure after disassembly in an embodiment of the present invention;

[0028] Figure 4 is a schematic structural diagram of the alternating polishing structure in an embodiment of the present invention;

[0029] Figure 5 is in an embodiment of the present invention Figure 4 an enlarged view of the structure at B;

[0030] Figure 6 is a schematic structural diagram of the cross plate in an embodiment of the present invention;

[0031] Figure 7 is in an embodiment of the present invention Figure 6 an enlarged view of the structure at C;

[0032] Figure 8 is a schematic structural diagram of the flipping plate in an embodiment of the present invention.

[0033] Description of the reference numerals: 1, base; 2, third groove; 3, fixed rod; 4, cylinder; 5, moving frame; 6, moving seat; 7, first electric telescopic rod; 8, fixed column; 9, first motor; 10, polishing wheel; 11, shielding cover; 12, support frame; 13, storage plate; 14, arc seat; 15, slide bar; 16, arc plate; 17, cross plate; 18, support plate; 19, first groove; 20, L-shaped bar; 21, vertical plate; 22, first rotating shaft; 23, connecting block; 24, T-shaped plate; 25, limiting frame; 26, through groove; 27, fixing piece; 28, spring; 29, blanking plate; 30, collection box; 31, fixing strip; 32, fixing block; 33, limiting block; 34, fixing plate; 35, second groove; 36, U-shaped frame; 37, second rotating shaft; 38, turning plate; 39, limiting seat; 40, gear; 41, first driving strip; 42, connecting strip; 43, second driving strip; 44, first mounting plate; 45, second motor; 46, turntable; 47, second electric telescopic rod; 48, pressing disc; 49, second mounting plate; 50, second chute; 51, slider; 52, inserting rod; 53, cross bar; 54, guiding groove. Detailed implementation manners

[0034] The following further describes the present invention in detail in conjunction with the attached Figures 1 - 8 drawings.

[0035] Referring to Figures 1 - 8 , an embodiment of the present invention discloses a polishing device for the surface of an automotive variable-diameter rod, including a base 1 and a polishing wheel 10. The polishing wheel 10 is arranged on the base 1 through an alternating polishing structure. A blanking structure is arranged on the left side of the base 1, and storage structures are arranged on the front and rear sides above the base 1;

[0036] The alternating polishing structure includes a third groove 2 opened in the middle of the upper surface of the base 1. Fixed rods 3 are connected to both ends of the front and rear side walls of the third groove 2. A moving frame 5 is movably sleeved on the two fixed rods 3. A moving seat 6 is movably arranged in the moving frame 5. A first electric telescopic rod 7 is installed on the right side surface of the moving frame 5. One end of the output shaft of the first electric telescopic rod 7 is connected to the moving seat 6. A fixed column 8 is connected above the upper surface of the moving seat 6. A guiding structure is arranged between the fixed column 8 and the moving frame 5. A first motor 9 is installed above the right side surface of the fixed column 8. One end of the output shaft of the first motor 9 is installed with a polishing wheel 10. A shielding cover 11 is arranged at the polishing wheel 10 through a rotation limiting structure. Fixing strips 31 are arranged near both ends of the outer arc surface of the shielding cover 11. A cylinder 4 is installed in the middle of the front surface of the base 1. One end of the output shaft of the cylinder 4 is connected to the moving frame 5;

[0037] An alternating feeding structure is arranged above the base 1, and a turning structure is arranged in the middle of the right side surface of the base 1;

[0038] The rotation limiting structure includes fixed blocks 32 arranged at both ends of the left and right sides of the shielding cover 11. The shielding cover 11 is rotatably connected to the inner wall of the fixed column 8, and four limiting blocks 33 are respectively arranged on the inner walls of both sides of the fixed column 8;

[0039] The guiding structure includes a cross bar 53 installed above the front of the moving frame 5. A guiding groove 54 is opened on the cross bar 53. The lower front of the fixed column 8 is connected with an insertion rod 52. The bottom end of the insertion rod 52 is movably inserted into the guiding groove 54. A sliding block 51 is arranged at the bottom end of the fixed column 8. A second sliding groove 50 for the sliding block 51 to slide is opened on the moving seat 6. When the moving frame 5 is at the front polishing position on the base 1, the first motor 9 is started to drive the polishing wheel 10 to rotate. At the same time, the first electric telescopic rod 7 is started to drive the moving seat 6 to move to the right in the moving frame 5. By using the rotating polishing wheel 10 to move closely along the outer surface of the variable diameter rod, the variable diameter rod is polished. And during the movement of the moving seat 6, one end of the insertion rod 52 is driven to slide in the guiding groove 54. Through the sliding of the sliding block 51 in the second sliding groove 50, the polishing wheel 10 is driven to move along the width direction of the moving frame 5, so that different outer diameter positions on the variable diameter rod can be polished, making the polishing of the variable diameter rod more thorough. After polishing the variable diameter rod at the front polishing position, the first electric telescopic rod 7 drives the moving seat 6 to move reversely in the moving frame 5 for resetting. Then the cylinder 4 is started to drive the moving frame 5 to move backward on the fixed rod 3, moving the moving frame 5 to the rear polishing position on the base 1. While the variable diameter rod at the front polishing position is unloaded, the polishing wheel 10 can continue to polish the variable diameter rod at the rear polishing position, greatly saving working time and improving work efficiency.

[0040] See Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 and

[0041] The alternating loading structure includes arc seats 14 installed on the left and right sides above the base 1. First chutes are formed on the mutually approaching sides of the two arc seats 14. Slide bars 15 are slidably arranged in the first chutes. Arc plates 16 are installed on the slide bars 15. Cross plates 17 are connected between the two ends of the two arc plates 16. A support plate 18 is arranged on the cross plate 17 through a connection structure. A first groove 19 is formed on the side of the support plate 18 close to the moving frame 5. A second driving bar 43 is installed on the left side surface of the moving frame 5. Teeth are arranged on the second driving bar 43 and the lower arc surface of the left arc plate 16 and are meshed with each other;

[0042] The connection structure includes vertical plates 21 arranged on both sides above the cross plate 17. A first rotating shaft 22 rotatably passes through the top openings of the vertical plates 21. A connecting block 23 is fixedly sleeved on the first rotating shaft 22. The connecting block 23 is connected to the support plate 18. A limiting frame 25 is fixedly sleeved on the bottom end of the right vertical plate 21. A through groove 26 is formed on the cross plate 17 at the position below the right vertical plate 21. A T-shaped plate 24 is connected to the bottom end of the right vertical plate 21 inserted into the through groove 26. A spring 28 is connected between the T-shaped plate 24 and the lower groove wall of the through groove 26. A fixing piece 27 is installed at the bottom end of the T-shaped plate 24;

[0043] The blanking structure includes a collection box 30 arranged at the left edge above the base 1. The inner bottom wall of the collection box 30 is inclined towards the middle. An inclined blanking plate 29 is installed on the collection box 30;

[0044] The switching structure includes a U-shaped frame 36 connected to the left side positions of two storage plates 13. In the middle of the lower inner wall of the U-shaped frame 36, a fixing plate 34 is connected. On the left side of the upper surface of the fixing plate 34, a second groove 35 is provided. When the moving frame 5 moves towards the rear polishing position, the arc-shaped plate 16 and the sliding bar 15 are driven by the second driving strip 43 to rotate as a whole in the arc-shaped seat 14, so that the cross plate 17, the supporting plate 18 and the variable-diameter rod at the front polishing position move towards the front storage plate 13. When the cross plate 17 moves down to the storage plate 13, one edge of the fixing piece 27 on the T-shaped plate 24 abuts closely against the L-shaped strip 20. As the arc-shaped plate 16 continues to rotate, the L-shaped strip 20 pushes the fixing piece 27 and the T-shaped plate 24 to move upward as a whole, thereby driving the supporting plate 18 to tilt downward towards the blanking plate 29, pouring the polished variable-diameter rod on the supporting plate 18 onto the blanking plate 29, and blanking from the blanking plate 29 into the collection frame 30 for collection. Since the lower inner wall of the collection frame 30 is inclined downward towards the middle, the variable-diameter rods blanked by the blanking plate 29 can be better collected into the collection frame 30; during the rotation of the arc-shaped plate 16, the rear cross plate 17 on the arc-shaped plate 16 moves upward, and the variable-diameter rod on the rear storage plate 13 is lifted by the supporting plate 18 and lifted to the rear polishing position, so that the polishing wheel 10 moving towards the rear can smoothly polish the variable-diameter rod at the rear polishing position. Moreover, the upward movement of the rear cross plate 17 will drive the arc-shaped plate 16 to block the variable-diameter rods stored on the rear storage plate 13, avoiding the problem of the variable-diameter rods on the storage plate 13 falling during the lifting and feeding process.

[0045] See Figure 1 、 Figure 2 and Figure 8 As shown in FIGS.

[0046] The flipping structure includes a second rotating shaft 37 rotatably connected to the middle of the right side surface of the base 1. A gear 40 is fixedly sleeved on one end of the second rotating shaft 37, and a flipping plate 38 is fixedly sleeved on the other end of the second rotating shaft 37. The flipping plate 38 is in an "L" shape. A driving structure is provided between the second rotating shaft 37 and the moving frame 5, and a pressing and rotating structure is provided on the flipping plate 38. A limiting seat 39 is installed on the base 1 at the bottom end of the flipping plate 38, and the limiting seat 39 is in a "U" shape;

[0047] The pressing and rotating structure includes a second mounting plate 49 installed at the left end of the inner wall of the flipping plate 38. A second electric telescopic rod 47 is installed on the second mounting plate 49. One end of the output shaft of the second electric telescopic rod 47 is rotatably installed with a pressing disc 48. A first mounting plate 44 is installed at the right side of the inner wall of the flipping plate 38. A second motor 45 is installed on the first mounting plate 44. One end of the output shaft of the second motor 45 is installed with a turntable 46. During the movement of the moving frame 5, the first driving strip 41 at one end of the connecting strip 42 is driven to move, and the flipping plate 38 is driven to rotate through the gear 40, so as to rotate the flipping plate 38 to the corresponding polishing position. In this way, when the second electric telescopic rod 47 on the second mounting plate 49 is started, the pressing disc 48 can be driven to move, and the lifted variable-diameter rod is pressed and clamped between the pressing disc 48 and the turntable 46. And during the polishing process, the second motor 45 is started to drive the turntable 46 to rotate. Through the static friction between the turntable 46 and the end of the variable-diameter rod, the whole variable-diameter rod and the pressing disc 48 are driven to rotate, so that the polishing wheel 10 can polish each position on the variable-diameter rod.

[0048] The implementation principle of a polishing device for the surface of a variable-diameter rod of an automobile in an embodiment of the present invention is as follows: First, the polishing rods to be polished are divided into two groups and stored on two storage plates 13 respectively. And one variable-diameter rod on the rear storage plate 13 closest to the moving frame 5 rolls onto the rear support plate 18 on the storage plate 13. At this time, the front support plate 18 is in the front polishing position. Start the first motor 9 to drive the polishing wheel 10 to rotate, and at the same time start the first electric telescopic rod 7 to drive the moving seat 6 to move to the right in the moving frame 5. Use the rotating polishing wheel 10 to move closely along the outer surface of the variable-diameter rod to polish the variable-diameter rod. And during the movement of the moving seat 6, one end of the inserting rod 52 is driven to slide in the guiding groove 54. Through the sliding of the sliding block 51 in the second sliding groove 50, the polishing wheel 10 is driven to move along the width direction of the moving frame 5, so that different outer diameter positions on the variable-diameter rod can be polished, making the polishing of the variable-diameter rod more thorough. After polishing the variable-diameter rod at the front polishing position, the first electric telescopic rod 7 drives the moving seat 6 to move in the moving frame 5 in the reverse direction for resetting. Then start the cylinder 4 to drive the moving frame 5 to move backward on the fixed rod 3, and move the moving frame 5 to the rear polishing position on the base 1. During the movement of the moving frame 5, the corresponding fixing strip 31 on the shielding cover 11 is driven to press against the fixing plate 34. As the moving frame 5 continues to move, through the pushing of the fixing plate 34 on the fixing strip 31, the shielding cover 11 is driven to rotate on the fixed column 8. After rotation, the corresponding fixing block 32 on the shielding cover 11 supports on the corresponding limiting block 33, so that the shielding position of the shielding cover 11 is automatically switched on the fixed column 8. And during the process of the moving frame 5 moving to the rear polishing position, the arc-shaped plate 16 and the sliding strip 15 as a whole are driven to rotate in the arc-shaped seat 14 through the second driving strip 43, so that the cross plate 17, the support plate 18 and the variable-diameter rod as a whole at the front polishing position move towards the front storage plate 13. When the cross plate 17 moves down to the storage plate 13, one edge of the fixing piece 27 on the T-shaped plate 24 abuts tightly against the L-shaped strip 20. As the arc-shaped plate 16 continues to rotate, the L-shaped strip 20 pushes the fixing piece 27 and the T-shaped plate 24 as a whole to move upward, so as to drive the support plate 18 to tilt downward towards the blanking plate 29, and pour the polished variable-diameter rod on the support plate 18 onto the blanking plate 29, and the variable-diameter rod blanked by the blanking plate 29 is collected into the collection frame 30. Since the lower inner wall of the collection frame 30 is inclined downward towards the middle, the variable-diameter rod blanked by the blanking plate 29 can be better collected into the collection frame 30;During the rotation of the arc-shaped plate 16, the rear horizontal plate 17 on the arc-shaped plate 16 moves upward, and through the support plate 18, the diameter-changing rod on the rear storage plate 13 is lifted, and the diameter-changing rod is lifted to the rear polishing position, so that the polishing wheel 10 moving backward can smoothly polish the diameter-changing rod at the rear polishing position. Moreover, the upward movement of the rear horizontal plate 17 will drive the arc-shaped plate 16 to block the diameter-changing rods stored on the rear storage plate 13, avoiding the problem of the diameter-changing rods on the storage plate 13 falling during the lifting and feeding process. At the same time, the moving frame 5 drives the first driving strip 41 at one end of the connecting strip 42 to move, and through the gear 40, the turning plate 38 is driven to rotate, and the turning plate 38 is rotated to the rear polishing position. In this way, when the second electric telescopic rod 47 on the second mounting plate 49 is started, the pressing disc 48 can be driven to move, and the lifted diameter-changing rod is pressed tightly between the pressing disc 48 and the turntable 46 and clamped and fixed. And during the polishing process, the second motor 45 is started to drive the turntable 46 to rotate. Through the static friction between the turntable 46 and the end of the diameter-changing rod, the diameter-changing rod and the pressing disc 48 as a whole are driven to rotate, so that the polishing wheel 10 can polish various positions on the diameter-changing rod. In this way, the polishing work can be realized, and the work efficiency is also higher.

[0049] The above are all the preferred embodiments of the present invention, and the protection scope of the present invention is not limited by this. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A polishing device for the surface of an automotive variable-diameter rod, comprising a base (1) and a polishing wheel (10), characterized in that: A polishing wheel (10) is arranged on the base (1) through an alternating polishing structure. A blanking structure is arranged on the left side of the base (1), and storage structures are arranged on both the front and rear sides above the base (1). The alternating polishing structure includes a third groove (2) opened in the middle of the upper surface of the base (1). Fixed rods (3) are connected to both ends of the front and rear side walls of the third groove (2). A moving frame (5) is movably sleeved on the two fixed rods (3). A moving seat (6) is movably arranged in the moving frame (5). A first electric telescopic rod (7) is installed on the right side surface of the moving frame (5). One end of the output shaft of the first electric telescopic rod (7) is connected to the moving seat (6). A fixed column (8) is connected to the upper surface of the moving seat (6). A guiding structure is arranged between the fixed column (8) and the moving frame (5). A first motor (9) is installed above the right side surface of the fixed column (8). A polishing wheel (10) is installed at one end of the output shaft of the first motor (9). A shielding cover (11) is arranged at the polishing wheel (10) through a rotation limiting structure. Fixed strips (31) are arranged at both ends of the outer arc surface of the shielding cover (11). A cylinder (4) is installed in the middle of the front surface of the base (1). One end of the output shaft of the cylinder (4) is connected to the moving frame (5). An alternating feeding structure is arranged above the base (1), and a flipping structure is arranged in the middle of the right side surface of the base (1). The rotation limiting structure includes fixed blocks (32) arranged at both ends of the left and right side surfaces of the shielding cover (11). The shielding cover (11) is rotatably connected to the inner wall of the fixed column (8). Four limiting blocks (33) are respectively arranged on the inner walls of both sides of the fixed column (8).

2. The polishing device for the surface of an automotive variable diameter rod according to claim 1, wherein: The storage structure includes support frames (12) arranged at the edges of the front and rear sides of the upper surface of the base (1). Storage plates (13) are installed on the support frames (12). A switching structure is arranged between the two storage plates (13). The storage plates (13) are arranged obliquely downward on the support frames (12) towards the side of the moving frame (5). Shielding edges are arranged at both edges of the left and right sides of the storage plates (13). L-shaped strips (20) are connected to the positions on the upper surface of the base (1) close to the two support frames (12).

3. A polishing device for the surface of a variable-diameter rod of an automobile according to claim 1, characterized in that: The alternating feeding structure includes arc-shaped seats (14) installed on both the left and right sides of the upper surface of the base (1). First chutes are opened on the mutually approaching side surfaces of the two arc-shaped seats (14). A sliding strip (15) is slidably arranged in the first chutes. An arc-shaped plate (16) is installed on the sliding strip (15). Cross plates (17) are connected between both ends of the two arc-shaped plates (16). A support plate (18) is arranged on the cross plate (17) through a connection structure. A first groove (19) is opened on the side of the support plate (18) close to the moving frame (5). A second driving strip (43) is installed on the left side surface of the moving frame (5). Teeth that are meshed with each other are arranged on the upper surface of the second driving strip (43) and the lower arc surface of the left arc-shaped plate (16).

4. A polishing device for the surface of a variable-diameter rod of an automobile according to claim 3, characterized in that: The connection structure includes vertical plates (21) arranged on both sides above the horizontal plate (17). A first rotating shaft (22) rotatably passes through the top openings of the vertical plates (21). A connecting block (23) is fixedly sleeved on the first rotating shaft (22). The connecting block (23) is connected to the supporting plate (18). A limiting frame (25) is fixedly sleeved on the bottom end of the right vertical plate (21). A through groove (26) is formed in the horizontal plate (17) below the right vertical plate (21). A T-shaped plate (24) is connected to the bottom end of the right vertical plate (21) inserted into the through groove (26). A spring (28) is connected between the T-shaped plate (24) and the lower groove wall of the through groove (26). A fixing piece (27) is installed at the bottom end of the T-shaped plate (24).

5. A polishing device for the surface of a variable-diameter rod of an automobile according to claim 1, characterized in that: The blanking structure includes a collection box (30) arranged at the left edge above the base (1). The lower inner wall of the collection box (30) is inclined towards the middle. An inclined blanking plate (29) is installed on the collection box (30).

6. A polishing device for the surface of a variable-diameter rod of an automobile according to claim 2, characterized in that: The switching structure includes a U-shaped frame (36) connected to the left positions of the two storage plates (13). A fixing plate (34) is connected to the middle of the lower inner wall of the U-shaped frame (36). A second groove (35) is formed in the left side above the fixing plate (34).

7. A polishing device for the surface of a variable-diameter rod of an automobile according to claim 1, characterized in that: The flipping structure includes a second rotating shaft (37) rotatably connected to the middle of the right side of the base (1). A gear (40) is fixedly sleeved on one end of the second rotating shaft (37). A flipping plate (38) is fixedly sleeved on the other end of the second rotating shaft (37). The flipping plate (38) is in an "L" shape. A driving structure is arranged between the second rotating shaft (37) and the moving frame (5). A pressing and rotating structure is arranged on the flipping plate (38). A limiting seat (39) is installed on the base (1) at the bottom end of the flipping plate (38). The limiting seat (39) is in a "U" shape.

8. A polishing device for the surface of a variable-diameter rod of an automobile according to claim 7, characterized in that: The driving structure includes a connecting strip (42) connected to the right side surface of the moving frame (5). One end of the connecting strip (42) passing through the arc-shaped seat (14) is connected to a first driving strip (41). Teeth meshing with the gear (40) are arranged on the first driving strip (41).

9. A polishing device for the surface of a variable-diameter rod of an automobile according to claim 7, characterized in that: The pressing and rotating structure includes a second mounting plate (49) installed at the left end of the inner wall of the flipping plate (38). A second electric telescopic rod (47) is installed on the second mounting plate (49). A pressing disc (48) is rotatably installed at one end of the output shaft of the second electric telescopic rod (47). A first mounting plate (44) is installed at the right side of the inner wall of the flipping plate (38). A second motor (45) is installed on the first mounting plate (44). A turntable (46) is installed at one end of the output shaft of the second motor (45).

10. A polishing device for the surface of an automotive variable-diameter rod according to claim 1, characterized in that: The guiding structure includes a cross bar (53) installed above the front of the moving frame (5). A guiding groove (54) is formed in the cross bar (53). An insertion rod (52) is connected to the lower part of the front of the fixed column (8). The bottom end of the insertion rod (52) is movably inserted into the guiding groove (54). A sliding block (51) is arranged at the bottom end of the fixed column (8). A second sliding groove (50) for the sliding block (51) to slide is formed on the moving seat (6).

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