A piston rod surface polishing device

Abstract

The application relates to the technical field of piston rod polishing, and particularly discloses a piston rod surface polishing device which comprises a base and a polishing mechanism, a chuck and a positioning shaft are rotationally arranged on the base, the chuck and the positioning shaft are coaxially arranged and can move to approach or move away from each other on the base, a supporting ring is coaxially arranged between the chuck and the positioning shaft and can rotate relative to the base, a notch is formed in the supporting ring, a plurality of frame bodies are uniformly distributed in the inner ring of the supporting ring, a sliding seat is arranged in each frame body, and the sliding seat can slide in the frame body along the radial direction of the supporting ring. In the process that the chuck and the positioning shaft approach each other, the piston rod center shaft position can be automatically calibrated and positioned, and the supporting ring can be automatically turned over, so that the chuck and the positioning shaft can be kept in the coaxial state to clamp, grab and drive the rotation of the piston rod, and meanwhile, the polishing mechanism can enter the inside of the supporting ring through the notch to complete polishing.

Description

Technical Field

[0001] This invention relates to the field of piston rod polishing technology, and more specifically to a piston rod surface polishing device. Background Technology

[0002] A piston rod typically consists of a rod body, a piston connecting end, and a load connecting end. In a hydraulic cylinder, the rod body converts hydraulic energy into mechanical energy through the piston, achieving linear reciprocating motion. Its working conditions are harsh, requiring it to withstand alternating stress, sliding friction, and corrosive environments. Therefore, it demands extremely high strength, wear resistance, and surface quality. In polishing, the piston rod is usually horizontally clamped by a three-jaw chuck and then polished using a polishing wheel.

[0003] However, existing piston rod polishing devices often cannot automatically clamp and fix the piston rod during use. Because it is necessary to ensure that the piston rod and the three-jaw chuck are coaxially fixed, the piston rod clamping and fixing is mostly done manually. It is difficult to control the coaxiality of the piston rod and the three-jaw chuck, resulting in poor clamping accuracy. Workers need to constantly adjust the angle of the piston rod during clamping to ensure that the piston rod does not become skewed and affect the polishing accuracy. This is not only troublesome and time-consuming, but also relies heavily on personal experience. When the piston rod is large, it is difficult for a single person to complete the clamping, and multiple people are often required to complete the clamping. This results in high labor intensity, low efficiency, and safety hazards. Summary of the Invention

[0004] This invention provides a piston rod surface polishing device, which aims to solve the problems in related technologies such as the inability to automatically complete the clamping and fixing of piston rods, the difficulty in controlling the coaxiality of piston rods and three-jaw chucks, poor clamping accuracy, and the need for workers to continuously adjust the angle of piston rods during clamping.

[0005] The piston rod surface polishing device of the present invention includes a base and a polishing mechanism. A chuck and a positioning shaft are rotatably arranged on the base. The chuck and the positioning shaft are coaxially arranged and can move on the base to move closer to or further away from each other.

[0006] A support ring is coaxially arranged between the chuck and the positioning shaft, which can rotate relative to the base. The support ring has a notch.

[0007] The support ring has multiple frames evenly distributed inside, and each frame is equipped with a slide block. The slide block can slide along the radial direction of the support ring inside the frame.

[0008] The frame is equipped with a turntable located below the slide block. A protruding plate is fixedly installed on the turntable, and the end of the plate away from the turntable can be raised or lowered within the frame as the turntable rotates.

[0009] An arc-shaped frame is coaxially arranged on the outside of the support ring. A push rod is arranged on one side of the arc-shaped frame. A locking component is arranged on the push rod so that it can push the arc-shaped frame to move when the chuck and the positioning shaft are close to each other, thereby driving the turntables in multiple frames to rotate synchronously to position the piston rod. After the piston rod is positioned, it can drive the arc-shaped frame and the support ring to rotate.

[0010] Preferably, two platforms are symmetrically arranged on the base, and the two platforms can slide relative to the base to move closer to or further away from each other, with the chuck and positioning shaft respectively arranged on the two platforms.

[0011] Preferably, the locking assembly consists of a locking sleeve and a locking plate. There are two locking sleeves, both of which are threaded to the outside of the push rod and located on both sides of the base. The locking plate is fixed to the side of the locking sleeve closest to the base and is set tightly against the side wall of the base.

[0012] Preferably, a support is fixedly installed on the top of the base, and a support ring is disposed on the support and is rotatable on the support.

[0013] Preferably, a top plate is fixedly installed at one end of the slide near the support ring. The top plate is V-shaped, and ball bearings are provided on its two opposite inclined surfaces. A first spring is provided between the slide and the frame.

[0014] Preferably, a gear ring is coaxially fixed on the turntable, and a rack that slides within the frame is engaged on one side of the gear ring, with the rack fixedly mounted on the arc-shaped frame.

[0015] Preferably, an arc-shaped groove is formed on the outer circumferential surface of the arc-shaped frame, a push plate is slidably mounted on the outside of the push rod, the push plate is slidably mounted in the arc-shaped groove, and a second spring is fixedly installed between the push plate and the push rod.

[0016] Preferably, one side of the arc-shaped frame is provided with a spiral guide rail and a transverse guide rail. The spiral guide rail is fixedly installed on the arc-shaped frame, and there are two transverse guide rails, which are respectively fixedly installed at the upper and lower ends of the spiral guide rail and connected to it. A vertical shaft set in the transverse guide rail is fixedly installed on the push rod.

[0017] Preferably, the polishing mechanism consists of a base, a frame, and a polishing wheel. The base is slidably mounted on a base and can slide laterally on the base. The frame is mounted on the base and can slide within the base to approach or move away from the support ring. The polishing wheel is mounted on the frame.

[0018] Beneficial effects:

[0019] In use, this invention supports the piston rod via a support ring. As the chuck and positioning shaft approach each other, the piston rod's central axis position is automatically calibrated and positioned, and the support ring flips, ensuring the chuck and positioning shaft remain coaxial to clamp, grip, and rotate the piston rod. Simultaneously, the polishing mechanism can enter the support ring through the notch to complete polishing. This allows for precise and automatic positioning and clamping of piston rods of different diameters during replacement, ensuring coaxiality between the piston rod and the chuck, and thus guaranteeing high-quality polishing. It eliminates the hassle of repeated adjustments by operators, making piston rod clamping more convenient, faster, and less labor-intensive, reducing worker workload, and improving polishing efficiency. Attached Figure Description

[0020] Figure 1 This is a perspective view of the present invention.

[0021] Figure 2 This is a perspective view of the invention from another angle.

[0022] Figure 3 This is the present invention. Figure 2 The front view.

[0023] Figure 4 This is the present invention. Figure 3 A magnified structural diagram of point A in the middle.

[0024] Figure 5 This is a perspective view of the support component of the present invention.

[0025] Figure 6 This is a schematic diagram of the bottom structure of the support ring of the present invention.

[0026] Figure 7 This is a cross-sectional view of the support ring of the present invention.

[0027] Figure 8 This is a perspective view of the arc-shaped frame of the present invention.

[0028] Figure label:

[0029] 10. Base; 20. Drive table; 21. Platform; 22. Chuck; 23. Positioning shaft; 30. Polishing mechanism; 31. Base; 32. Frame; 33. Polishing wheel; 40. Support component; 41. Support ring; 411. Notch; 42. Support; 50. Positioning assembly; 51. Frame; 52. Slide; 521. First spring; 53. Top plate; 531. Ball bearing; 60. Pushing assembly; 61. Turntable; 62. Protruding plate; 63. Gear ring; 64. Rack; 70. Transmission mechanism; 71. Arc frame; 711. Arc groove; 72. Push plate; 73. Push rod; 731. Locking sleeve; 732. Locking plate; 74. Second spring; 80. Tilting mechanism; 81. Spiral guide rail; 82. Horizontal guide rail; 83. Vertical shaft. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] like Figures 1 to 8 As shown, the piston rod surface polishing device of the present invention includes a base 10, a drive stage 20, a polishing mechanism 30, a support member 40, a positioning component 50, a pushing component 60, a transmission mechanism 70, and a flipping mechanism 80. The drive stage 20 is disposed on the base 10 for clamping and fixing the piston rod and driving the piston rod to rotate, thereby cooperating with the polishing mechanism 30 to polish the piston rod. The support member 40 is located on one side of the drive stage 20 for supporting the piston rod. The positioning component 50, the pushing component 60, and the transmission mechanism 70 are disposed on the support member 40. When the piston rod is positioned on the drive stage 20, the pushing component 60 cooperates with the transmission mechanism 70 to drive the positioning component 50 to operate and center the piston rod. Then, the flipping mechanism 80 drives the support member 40 to flip so that the polishing mechanism 30 can polish the piston rod.

[0032] refer to Figure 1 , Figure 2 as well as Figure 3 The drive stage 20 includes a base 21, a chuck 22, and a positioning shaft 23. Two bases 21 are symmetrically arranged on the base 10 and can slide close to or away from each other on the base 10. The chuck 22 and the positioning shaft 23 are respectively rotatably mounted on opposite sides of the two bases 21, and the chuck 22 and the positioning shaft 23 are coaxially arranged. A motor mounted on the base 21 is provided on one side of the chuck 22 to drive the chuck 22 to rotate, thereby causing the chuck 22 to rotate with the piston rod.

[0033] refer to Figure 2 and Figure 3The polishing mechanism 30 consists of a base 31, a frame 32, and a polishing wheel 33. The base 31 is slidably mounted on the base 10 and can slide laterally on the base 10. The frame 32 is mounted on the base 31 and can slide within the base 31 to approach or move away from the support member 40. The polishing wheel 33 is mounted on the frame 32 and can rotate on the frame 32 to polish the piston rod.

[0034] refer to Figure 2 and Figure 5 The support member 40 consists of a support ring 41 and a support 42. The support ring 41 is located between two bases 21 and is coaxially arranged with the chuck 22. It is used to support and place the piston rod. The support ring 41 has a notch 411 so that the piston rod can enter the interior of the support ring 41. The support 42 is set on the support ring 41 and fixed to the base 10. The support ring 41 can rotate on the support 42 to change the position of the notch 411, so as to facilitate the polishing and replacement of the piston rod.

[0035] refer to Figure 5 and Figure 7 The positioning assembly 50 includes a frame 51, a slide 52, and a top plate 53. The frame 51 is fixedly mounted on the support ring 41. The slide 52 is disposed inside the frame 51 and can move within the frame 51 along the radial direction of the support ring 41. A first spring 521 is provided between the slide 52 and the frame 51. The top plate 53 is fixedly mounted on one end of the slide 52 near the central axis of the support ring 41 and can slide with the slide 52 within the frame 51 to center the piston rod near the center of the support ring 41 or to release the positioning of the piston rod away from the central axis of the support ring 41. The top plate 53 is V-shaped, and ball bearings 531 are provided on its two opposite inclined surfaces to facilitate the rotation and axial movement of the piston rod after center positioning.

[0036] refer to Figure 7 and Figure 8 The pushing component 60 includes a turntable 61, a convex plate 62, a gear ring 63, and a rack 64. The turntable 61 is located below the slide block 52 and is rotatably mounted inside the frame 51. The convex plate 62 is fixedly mounted on the turntable 61, and its end away from the turntable 61 can rise or fall inside the frame 51 as the turntable 61 rotates. When the end of the convex plate 62 rises, it pushes the slide block 52 to slide inside the frame 51, causing the top plate 53 to move towards the center of the support ring 41 to position the piston rod. When the end of the convex plate 62 falls, it releases the thrust on the slide block 52, causing the slide block 52 to slide and reset under the action of the first spring 521, releasing the piston rod positioning. The gear ring 63 is coaxially fixed outside the turntable 61. The rack 64 is slidably mounted inside the frame 51 and meshes with the gear ring 63. Through the sliding of the rack 64, it pushes the gear ring 63 to make the turntable 61 rotate, causing the end of the convex plate 62 to rise or fall.

[0037] refer to Figure 4 , Figure 6 as well as Figure 8 The transmission mechanism 70 includes an arc-shaped frame 71, a push plate 72, a push rod 73, and a second spring 74. The arc-shaped frame 71 is coaxially disposed outside the support ring 41 and can slide along the axial direction of the support ring 41. Multiple racks 64 within the multiple frames 51 on the support ring 41 are fixed to the arc-shaped frame 71, allowing the arc-shaped frame 71 to drive the multiple racks 64 to move synchronously during sliding, so that the multiple top plates 53 converge to center the piston rod. The push plate 72 is disposed on the arc-shaped frame 71 and can slide relative to the arc-shaped frame 71. The push rod 73 is slidably mounted on the base 21 and can... The platform 21 slides inward, thereby changing the position of the platform 21 on the push rod 73, so that the initial distance between the two platforms 21 can be adjusted according to the length of the piston rod. The push rod 73 is provided with a locking component to fix the push rod 73 and the platform 21, so that the push rod 73 can move with the platform 21. The push plate 72 is slidably assembled on the outside of the push rod 73. The second spring 74 is fixedly installed between the push rod 73 and the push plate 72, so that when the push rod 73 moves, the second spring 74 pushes the push plate 72 to move, thereby driving the arc frame 71 to move and positioning the piston rod.

[0038] The locking assembly consists of locking sleeves 731 and locking plates 732. There are two locking sleeves 731, both of which are threaded to the outside of the push rod 73 and are located on both sides of the platform 21. The locking plates 732 are fixed to the side of the locking sleeves 731 closest to the platform 21 and are set tightly against the side wall of the platform 21. The two locking plates 732 clamp the two sides of the platform 21, thereby fixing the push rod 73 to the platform 21 and allowing the push rod 73 to move with the platform 21. By rotating the locking sleeves 731 to move them on the push rod 73, the locking plates 732 are moved away from the platform 21, thus releasing the fixation between the push rod 73 and the platform 21. This allows the platform 21 to slide outside the push rod 73 when moving, thereby adjusting the initial distance between the two platforms 21 to better adapt to the processing of piston rods of different lengths and improve the applicability of the equipment.

[0039] An arc-shaped groove 711 is provided on the outer peripheral surface of the arc-shaped frame 71. The push plate 72 is slidably assembled in the arc-shaped groove 711. By sliding the push plate 72 in the arc-shaped groove 711, the push plate 72 and the arc-shaped frame 71 can move relative to each other, so as to avoid the push plate 72 affecting the rotation of the arc-shaped frame 71.

[0040] A limiting groove is provided on the push rod 73 along its axial direction, and a limiting protrusion is fixed on the push plate 72 and slidably assembled in the limiting groove. By sliding the limiting protrusion in the limiting groove, the relative position between the push rod 73 and the push plate 72 is restricted, so that the push plate 72 cannot rotate outside the push rod 73.

[0041] refer to Figure 4 , Figure 6 as well as Figure 8 The flipping mechanism 80 includes a spiral guide rail 81, a horizontal guide rail 82, and a vertical shaft 83. The spiral guide rail 81 is fixedly installed on the arc-shaped frame 71. There are two horizontal guide rails 82, which are fixedly installed at the upper and lower ends of the spiral guide rail 81 and connected to it. The vertical shaft 83 is set in the horizontal guide rail 82 and fixed to the push rod 73. The vertical shaft 83 can slide along the horizontal guide rail 82 and the spiral guide rail 81 as the push rod 73 moves. By moving the vertical shaft 83 in the horizontal guide rail 82, the rotation of the arc-shaped frame 71 and the support ring 41 is restricted. By moving the vertical shaft 83 in the spiral guide rail 81, the arc-shaped frame 71 and the support ring 41 are pushed to rotate, which can change the position and orientation of the notch 411 so that the notch 411 can face the polishing mechanism 30, so as to facilitate the polishing of the piston rod.

[0042] Working principle: The piston rod is inserted into the support ring 41 through the notch 411 and supported by the bottom top plate 53. This drives the two bases 21 to move, bringing the chuck 22 and the positioning shaft 23 closer together. At the same time, the bases 21 drive the push rod 73 to move, which pushes the push plate 72 through the second spring 74. This causes the arc frame 71 to move axially on the support ring 41, which in turn drives multiple racks 64 in the support ring 41 to move along their respective frames 51. This pushes the gear ring 63 to make the turntable 61 rotate within the frame 51, causing the end of the convex plate 62 to rise and push the slide block 52 to slide within the frame 51. This causes the top plate 53 to move radially along the support ring 41. Multiple top plates 53 abut against the piston rod surface from different directions, centering the piston rod and keeping it coaxial with the support ring 41 and the chuck 22.

[0043] After the piston rod is positioned, the top plate 53 cannot move further, restricting the slide block 52 from sliding further. This prevents the second spring 74 from pushing the push plate 72 and the arc frame 71 to move further. As the push rod 73 moves, the second spring 74 is gradually compressed, and the vertical shaft 83 begins to move along the transverse guide rail 82 and then enters the spiral guide rail 81. The movement of the vertical shaft 83 on the spiral guide rail 81 pushes the spiral guide rail 81 to rotate, along with the arc frame 71 and the support ring 41, changing the direction of the notch 411. When the vertical shaft 83 moves from the spiral guide rail 81 to the next transverse guide rail 82, the support ring 41 stops rotating. At this time, the notch 411 stops on one side of the polishing mechanism 30, allowing the polishing mechanism 30 to pass through the support ring 41.

[0044] As the chuck 22 and the positioning shaft 23 continue to approach each other, the piston rod is pushed to move axially within the support ring 41. Finally, the piston rod is clamped by both ends, and then the chuck 22 grabs and fixes the piston rod, driving the chuck 22 to rotate with the piston rod. The polishing mechanism 30 operates to polish the piston rod.

[0045] In this invention, the piston rod is supported by a support ring 41. As the chuck 22 and the positioning shaft 23 approach each other, the piston rod's central axis position is automatically calibrated and positioned, and the support ring 41 is flipped. This ensures that the chuck 22 and the positioning shaft 23 remain coaxial, clamping, gripping, and rotating the piston rod. Simultaneously, it ensures that the polishing mechanism 30 can enter the support ring 41 through the notch 411 to complete the polishing. This allows for precise and automatic positioning and clamping of piston rods of different diameters during replacement, ensuring the coaxiality of the piston rod and the chuck 22, thereby ensuring better polishing quality for the piston rod. This eliminates the hassle of repeated adjustments by the operator, making piston rod clamping more convenient, faster, and more labor-saving, reducing the labor intensity of the operator, and improving the polishing efficiency of the piston rod.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A piston rod surface polishing device comprising a base (10) and a polishing mechanism (30), characterized in that, A chuck (22) and a positioning shaft (23) are rotatably arranged on the base (10), the chuck (22) and the positioning shaft (23) are coaxially arranged and can move close to or away from each other on the base (10); A support ring (41) is coaxially arranged between the chuck (22) and the positioning shaft (23) and can rotate relative to the base (10), and the support ring (41) is provided with a notch (411); A plurality of frame bodies (51) are uniformly distributed in the inner ring of the support ring (41), and a sliding seat (52) is arranged in each frame body (51), and the sliding seat (52) can slide in the frame body (51) along the radial direction of the support ring (41); A turntable (61) is rotatably arranged below the sliding seat (52) in the frame body (51), and a lug plate (62) is fixedly installed on the turntable (61), and one end of the lug plate (62) away from the turntable (61) can be lifted or lowered in the frame body (51) with the rotation of the turntable (61); An arc-shaped frame (71) is coaxially arranged on the outside of the support ring (41), one side of the arc-shaped frame (71) is provided with a push rod (73), and the push rod (73) is provided with a locking assembly, so that it can drive the arc-shaped frame (71) to move when the chuck (22) and the positioning shaft (23) are close to each other, drive the turntables (61) in the plurality of frame bodies (51) to rotate synchronously to position the piston rod, and can drive the arc-shaped frame (71) and the support ring (41) to rotate after the piston rod is positioned; The turntable (61) is coaxially fixed with a gear ring (63), one side of the gear ring (63) is engaged with a rack (64) sliding in the frame body (51), and the rack (64) is fixedly installed on the arc-shaped frame (71); An arc-shaped groove (711) is formed on the outer circumferential surface of the arc-shaped frame (71), and a push plate (72) is slidingly assembled on the outside of the push rod (73), the push plate (72) is slidingly assembled in the arc-shaped groove (711), and a second spring (74) is fixedly installed between the push plate (72) and the push rod (73); One side of the arc-shaped frame (71) is provided with a spiral guide rail (81) and a transverse guide rail (82), the spiral guide rail (81) is fixedly installed on the arc-shaped frame (71), and the transverse guide rail (82) has two and is fixedly installed on the upper and lower ends of the spiral guide rail (81) and communicates therewith, and a vertical shaft (83) is fixedly installed on the push rod (73) and arranged in the transverse guide rail (82).

2. The piston rod surface polishing apparatus according to claim 1, characterized in that Two pedestals (21) are symmetrically arranged on the base (10), and the two pedestals (21) can slide close to or away from each other relative to the base (10), and the chuck (22) and the positioning shaft (23) are arranged on the two pedestals (21) respectively.

3. The piston rod surface polishing apparatus according to claim 2, characterized in that The locking assembly is composed of a locking sleeve (731) and a locking plate (732), the locking sleeve (731) has two, and the two locking sleeves (731) are threadedly connected to the outside of the push rod (73) and are located on the two sides of the pedestal (21) respectively, and the locking plate (732) is fixed on one side of the locking sleeve (731) close to the pedestal (21) and abuts against the side wall of the pedestal (21).

4. The piston rod surface polishing apparatus according to claim 1, characterized in that, The top of the base (10) is fixedly provided with a support (42), a supporting ring (41) is arranged on the support (42) and can rotate on the support (42).

5. The piston rod surface polishing apparatus according to claim 4, characterized in that One end of the sliding seat (52) close to the supporting ring (41) is fixedly provided with a top plate (53), the top plate (53) is V-shaped, ball bearings (531) are arranged on opposite two inclined surfaces of the top plate (53), and the sliding seat (52) and the frame body (51) are provided with first springs (521).

6. The piston rod surface polishing apparatus according to claim 1, characterized in that The polishing mechanism (30) is composed of a base (31), a rack (32) and a polishing wheel (33), the base (31) is slidingly assembled on the base (10) and can slide transversely on the base (10), the rack (32) is arranged on the base (31) and can slide on the base (31) to approach or move away from the supporting ring (41), and the polishing wheel (33) is arranged on the rack (32).

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