Piston rod perpendicularity calibration tool

Abstract

The utility model belongs to the technical field of oil cylinder piston rod production, and particularly relates to a piston rod perpendicularity calibration tool which comprises a machining base, a positioning wheel and a centering assembly. Fixing rings are fixedly installed on the two sides of the top face of the machining base, the piston rod can be inserted into the inner diameter range of the fixing rings, the multiple positioning wheels are evenly distributed in the inner diameter range of the fixing rings, the positioning wheels can make contact with the outer surface of the piston rod, and the centering assemblies are arranged on the fixing rings. The centering assembly is used for keeping the positioning wheel attached to the outer surface of the piston rod. When the piston rod and the rod head are installed on the fixing ring, the positioning wheel can enable the piston rod and the rod head to move in the axial direction conveniently, so that the rod head and the piston rod can make close contact, meanwhile, the axis of the piston rod and the axis of the rod head can be consistent, and welding efficiency is improved during welding. And the positioning wheel can lock the piston rod and the rod head in the axial direction, and meanwhile the piston rod and the rod head can rotate conveniently during welding.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder piston rod manufacturing technology; specifically, this utility model relates to a piston rod verticality calibration tool. Background Technology

[0002] During the manufacturing process of hydraulic cylinder piston rods, some hydraulic cylinders require the rod head and piston rod to be rotary welded. The rod head generally has bearing mounting holes or bushing mounting holes. The axis of the mounting hole and the axis of the piston rod must be perpendicular to a certain extent to prevent the hydraulic cylinder from generating biased lateral loads during operation and affecting the use of the hydraulic cylinder. The general production process is to rough machine the rod head, leaving a fine machining allowance for the mounting hole, and after welding it to the piston rod body, the mounting hole is bored or milled with the piston rod body as a reference.

[0003] This process ensures the perpendicularity of the mounting hole to the piston rod axis, but the steps are cumbersome, require many clamping operations, are inefficient, and cannot be used flexibly for different specifications of rod heads. When encountering a relatively long piston rod, the processing requirements of the boring and milling machine also increase. Utility Model Content

[0004] In view of this, the present invention provides a piston rod verticality calibration tool, thereby solving or at least alleviating the above-mentioned problems existing in the prior art.

[0005] To achieve the aforementioned objective, this utility model provides a piston rod verticality calibration tool, including a machining base, positioning wheels, and a centering assembly. Fixing rings are fixedly installed on both sides of the top surface of the machining base, allowing the piston rod to be inserted within the inner diameter range of the fixing rings. Multiple positioning wheels are provided, evenly distributed within the inner diameter range of the fixing rings, and are capable of contacting the outer surface of the piston rod. The centering assembly is mounted on the fixing rings and is used to keep the positioning wheels in contact with the outer surface of the piston rod.

[0006] In the piston rod verticality calibration tool described above, optionally, the positioning wheel is provided with a wheel frame, the side of the wheel frame away from the positioning wheel faces the fixed ring, a gear is fixedly installed on the side of the wheel frame away from the positioning wheel, a rotating sleeve is rotatably installed on the side of the wheel frame away from the positioning wheel, the gear is disposed inside the rotating sleeve, a sliding rod is fixedly installed on the top surface of the rotating sleeve, an extension rod is fixedly installed on the end of the sliding rod away from the rotating sleeve, the extension rod faces the fixed ring and is perpendicular to the sliding rod.

[0007] In the piston rod verticality calibration tool described above, optionally, a movable plate is provided on the side of the rotating sleeve, and a stabilizing rod and a rack are fixedly installed at both ends of the movable plate, respectively. The stabilizing rod and the rack are slidably installed inside the rotating sleeve, and the teeth of the rack are meshed with a gear. The gear is between the stabilizing rod and the rack, and the stabilizing rod and the rack are parallel to the axial direction of the fixed ring.

[0008] In the piston rod verticality calibration tool described above, optionally, a limiting rod is fixedly installed on the outer surface of the rotating sleeve facing the moving plate. The end of the limiting rod can contact the side of the moving plate facing the rotating sleeve. A spring is provided on the outside of the limiting rod. The two ends of the spring are fixedly installed on the moving plate and the rotating sleeve, respectively. Extension plates are fixedly installed on both sides of the moving plate. The extension plates are perpendicular to the moving plate.

[0009] In the piston rod perpendicularity calibration tool described above, optionally, the centering assembly includes a rotating ring and a moving ring. The rotating ring is rotatably mounted on the opposite surfaces of the two fixed rings, and the inner diameter of the rotating ring is the same as the inner diameter of the fixed rings. The sliding rod is slidably mounted on the rotating ring, and the sliding rod is radially aligned with the rotating ring. The moving ring is disposed on the opposite surfaces of the two fixed rings, and the outer diameter of the moving ring is the same as the inner diameter of the fixed rings. The moving ring is capable of contacting the extension plate.

[0010] In the piston rod verticality calibration tool described above, optionally, a groove is provided on the fixing ring, the extension rod is slidably installed in the groove, the end of the extension rod away from the sliding rod passes through the groove, and a pad is slidably installed on the outer wall of the extension rod.

[0011] In the piston rod verticality calibration tool described above, optionally, a pressing plate is fixedly installed on the outer wall of the moving ring, the pressing plate has a through groove, the extension rod is slidably installed in the through groove, and the pressing plate is in contact with the pad.

[0012] In the piston rod verticality calibration tool described above, optionally, a fixing plate is fixedly installed on the outer wall of the moving ring, a threaded rod is threadedly connected to the end of the fixing plate, and a locking block is fixedly installed at the end of the threaded rod, the locking block being able to contact the outer wall of the fixing ring.

[0013] This utility model discloses a piston rod perpendicularity calibration tool, which employs a positioning wheel capable of axial switching. The positioning wheel can contact the outer surface of the rod head and piston rod. When the piston rod and rod head are mounted on the fixing ring, the positioning wheel facilitates axial movement of the piston rod and rod head, ensuring tight contact between them and aligning their axes. Furthermore, during welding, the positioning wheel can lock the piston rod and rod head axially while allowing them to rotate during welding. Attached Figure Description

[0014] The disclosure of this utility model will become more apparent with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings:

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the fixing ring and the centering component of this utility model;

[0017] Figure 3 This is a schematic diagram of the positioning wheel of this utility model;

[0018] Figure 4 This is a schematic diagram of the connection structure between the gear and the movable plate of this utility model;

[0019] Figure 5 This is a schematic diagram of the rotating sleeve of this utility model;

[0020] Figure 6 This is a schematic diagram of the moving ring of this utility model.

[0021] Reference numerals in the attached diagram: 1. Machining base; 1-1. Fixing ring; 1-2. Slide groove; 2. Positioning wheel; 2-1. Wheel frame; 2-2. Gear; 2-3. Rotating sleeve; 2-4. Sliding rod; 2-5. Extension rod; 2-51. Pad; 2-6. Moving plate; 2-61. Stabilizing rod; 2-62. Rack; 2-63. Extension plate; 2-7. Limiting rod; 2-8. Spring; 3. Centering assembly; 3-1. Rotating ring; 3-2. Moving ring; 3-3. Pressing plate; 3-4. Through groove; 3-5. Fixing plate; 3-6. Threaded rod; 3-7. Locking block. Detailed Implementation

[0022] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] like Figures 1 to 6 As shown, a typical embodiment of this utility model provides a piston rod verticality calibration tool, including a processing base 1, positioning wheels 2, and a centering assembly 3; a fixing ring 1-1 is fixedly installed on both sides of the top surface of the processing base 1, and the piston rod can be inserted into the inner diameter range of the fixing ring 1-1; multiple positioning wheels 2 are provided, and the multiple positioning wheels 2 are evenly distributed within the inner diameter range of the fixing ring 1-1; the positioning wheels 2 can contact the outer surface of the piston rod; the centering assembly 3 is set on the fixing ring 1-1, and the centering assembly 3 is used to keep the positioning wheels 2 in contact with the outer surface of the piston rod.

[0024] In use, first insert the piston rod and the rod head to be welded to the piston rod into the inner diameter of the fixing rings 1-1 on both sides. By adjusting the centering assembly 3, the positioning wheels 2 in the fixing rings 1-1 on both sides are respectively aligned with the outer surfaces of the piston rod and the rod head. By using the fact that the centers of the fixing rings 1-1 on both sides are on the same axis, the positioning wheels 2 can make the axis of the piston rod and the axis of the rod head consistent when they contact the outer surfaces of the piston rod and the rod head. This makes it easy to keep the piston rod and the rod head in an axially aligned state for welding, which can ensure welding accuracy.

[0025] The positioning wheel 2 is provided with a wheel frame 2-1. The side of the wheel frame 2-1 away from the positioning wheel 2 faces the fixing ring 1-1. A gear 2-2 is fixedly installed on the side of the wheel frame 2-1 away from the positioning wheel 2. A rotating sleeve 2-3 is rotatably installed on the side of the wheel frame 2-1 away from the positioning wheel 2. The gear 2-2 is located inside the rotating sleeve 2-3. A sliding rod 2-4 is fixedly installed on the top surface of the rotating sleeve 2-3. An extension rod 2-5 is fixedly installed on the end of the sliding rod 2-4 away from the rotating sleeve 2-3. The extension rod 2-5 faces the fixing ring 1-1 and is perpendicular to the sliding rod 2-4.

[0026] When gear 2-2 rotates, it can control the rotation of wheel frame 2-1. Wheel frame 2-1 can drive positioning wheel 2 to rotate, so that the axial direction of positioning wheel 2 can switch back and forth between a state parallel to the axial direction of piston rod and a state perpendicular to the axial direction of piston rod.

[0027] When the axial direction of the positioning wheel 2 is parallel to the axial direction of the piston rod, the piston rod and rod head can be locked in the fixed ring 1-1 in the axial direction. At this time, the piston rod and rod head can rotate between the fixed ring 1-1, which facilitates welding of the piston rod and rod head.

[0028] When the axial direction of the positioning wheel 2 is perpendicular to the axial direction of the piston rod, the piston rod and rod head can be inserted into the fixing ring 1-1. At this time, the piston rod and rod head can slide within the fixing ring 1-1, which facilitates the close contact between the opposite ends of the piston rod and rod head, making the welding process of the piston rod and rod head easier and allowing control of the welding position.

[0029] The rotating sleeve 2-3 has a movable plate 2-6 on its side. A stabilizing rod 2-61 and a rack 2-62 are fixedly installed at both ends of the movable plate 2-6. The stabilizing rod 2-61 and the rack 2-62 are slidably installed inside the rotating sleeve 2-3. The teeth of the rack 2-62 are meshed with the gear 2-2. The gear 2-2 is between the stabilizing rod 2-61 and the rack 2-62. The stabilizing rod 2-61 and the rack 2-62 are both parallel to the axis of the fixed ring 1-1.

[0030] When the movable plate 2-6 moves, it can drive the stabilizer bar 2-61 and rack 2-62 to continue moving. When the rack 2-62 moves, it can drive the gear 2-2 to rotate, so that the axial direction of the positioning wheel 2 can switch back and forth between being parallel to the axial direction of the piston rod and being perpendicular to the axial direction of the piston rod.

[0031] A limiting rod 2-7 is fixedly installed on the outer surface of the rotating sleeve 2-3 facing the moving plate 2-6. The end of the limiting rod 2-7 can contact the side of the moving plate 2-6 facing the rotating sleeve 2-3. A spring 2-8 is provided on the outside of the limiting rod 2-7. The two ends of the spring 2-8 are fixedly installed on the moving plate 2-6 and the rotating sleeve 2-3 respectively. Extension plates 2-63 are fixedly installed on both sides of the moving plate 2-6. The extension plates 2-63 are perpendicular to the moving plate 2-6.

[0032] When the extension plate 2-63 moves, it can drive the moving plate 2-6 to move. When the moving plate 2-6 moves towards the rotating sleeve 2-3, the spring 2-8 is compressed. When the moving plate 2-6 contacts the limit rod 2-7, the axis of the positioning wheel 2 is parallel to the axis of the piston rod.

[0033] When spring 2-8 returns to its original position, it can drive moving plate 2-6 to return to its original position. At this time, moving plate 2-6 disengages from limit rod 2-7, and makes the axis of positioning wheel 2 perpendicular to the axis of piston rod.

[0034] The centering assembly 3 includes a rotating ring 3-1 and a moving ring 3-2. The rotating ring 3-1 is rotatably mounted on the opposite surfaces of the two fixed rings 1-1. The inner diameter of the rotating ring 3-1 is the same as the inner diameter of the fixed rings 1-1. The sliding rod 2-4 is slidably mounted on the rotating ring 3-1. The sliding rod 2-4 is radially aligned with the rotating ring 3-1. The moving ring 3-2 is disposed on the opposite surfaces of the two fixed rings 1-1. The outer diameter of the moving ring 3-2 is the same as the inner diameter of the fixed rings 1-1. The moving ring 3-2 can contact the extension plate 2-63.

[0035] When the piston rod is inserted into the fixed ring 1-1 on one side, rotate the rotating ring 3-1 so that the positioning wheel 2 can contact the outer surface of the piston rod, so that the axis of the piston rod is aligned with the axis of the fixed ring 1-1. At this time, rotate the positioning wheel 2 so that the piston rod is locked in the fixed ring 1-1 in the axial direction.

[0036] Insert the rod head into the other side of the fixing ring 1-1, rotate the rotating ring 3-1 so that the positioning wheel 2 can contact the outer surface of the rod head, so that the axis of the rod head is aligned with the axis of the fixing ring 1-1. At this time, push the rod head so that the rod head can contact the end of the piston rod, and rotate the positioning wheel 2 so that the rod head is locked in the fixing ring 1-1 in the axial direction.

[0037] After the piston rod and rod head are axially fixed, the piston rod and rod head are welded together. At this time, the piston rod and rod head can rotate, which makes it easy to weld the piston rod and rod head without changing their positions.

[0038] A groove 1-2 is provided on the fixed ring 1-1. The extension rod 2-5 is slidably installed in the groove 1-2. The end of the extension rod 2-5 away from the sliding rod 2-4 passes through the groove 1-2, and a pad 2-51 is slidably installed on the outer wall of the extension rod 2-5.

[0039] When the rotating ring 3-1 rotates, it can drive the sliding rod 2-4 to rotate. When the sliding rod 2-4 rotates, it can drive the extension rod 2-5 to rotate. When the extension rod 2-5 is blocked by the sliding groove 1-2, it can drive the positioning ring to undergo radial displacement, so that the positioning wheel 2 can contact the outer surface of the piston rod and the rod head.

[0040] A pressing plate 3-3 is fixedly installed on the outer wall of the movable ring 3-2. The pressing plate 3-3 has a through groove 3-4. The extension rod 2-5 is slidably installed in the through groove 3-4. The pressing plate 3-3 is in contact with the pad 2-51.

[0041] When the extension rod 2-5 rotates, it can slide within the through groove 3-4, allowing the moving ring 3-2 to rotate. This facilitates the adaptation to different displacements of the positioning wheel 2. When the moving ring 3-2 moves toward the fixed ring 1-1, it can drive the pressing plate 3-3 to move toward the fixed ring 1-1 and contact the pad 2-51. When the pressing plate 3-3 tightly contacts the pad 2-51 with the fixed ring 1-1, it can clamp the rotating ring 3-1 at a specified angle, allowing the rotating ring 3-1 to maintain the specified angle.

[0042] A fixing plate 3-5 is fixedly installed on the outer wall of the movable ring 3-2. A threaded rod 3-6 is threadedly connected to the end of the fixing plate 3-5. A locking block 3-7 is fixedly installed at the end of the threaded rod 3-6. The locking block 3-7 can contact the outer wall of the fixing ring 1-1.

[0043] Rotate the threaded rod 3-6 so that the locking block 3-7 contacts the fixed ring 1-1. Continue to rotate the threaded rod 3-6 so that the pressing plate 3-3 and the locking block 3-7 move relative to each other, thereby causing the moving ring 3-2 to move.

[0044] The technical scope of this utility model is not limited to the contents of the above description. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the scope of this utility model.

Claims

1. A piston rod perpendicularity calibration tool, characterized in that, The utility model provides a centering device for piston rod, including processing base (1), positioning wheel (2) and centring assembly (3), both sides of the top surface of processing base (1) are fixedly installed with fixed ring (1-1), piston rod can be inserted in the inner diameter range of fixed ring (1-1), positioning wheel (2) is equipped with a plurality of, a plurality of positioning wheel (2) evenly distribute in the inner diameter range of fixed ring (1-1), positioning wheel (2) can be in contact with the outer surface of piston rod, the centring assembly (3) is arranged on fixed ring (1-1), the centring assembly (3) is used to keep the state of positioning wheel (2) adhering to the outer surface of piston rod.

2. A piston rod perpendicularity calibration tool as claimed in claim 1, characterized in that The utility model provides a centering device for piston rod, including processing base (1), positioning wheel (2) and centring assembly (3), both sides of the top surface of processing base (1) are fixedly installed with fixed ring (1-1), piston rod can be inserted in the inner diameter range of fixed ring (1-1), positioning wheel (2) is equipped with a plurality of, a plurality of positioning wheel (2) evenly distribute in the inner diameter range of fixed ring (1-1), positioning wheel (2) can be in contact with the outer surface of piston rod, the centring assembly (3) is arranged on fixed ring (1-1), the centring assembly (3) is used to keep the state of positioning wheel (2) adhering to the outer surface of piston rod.

3. A piston rod perpendicularity calibration tool as claimed in claim 2, characterized in that The side of rotating sleeve (2-3) is equipped with moving plate (2-6), both ends of moving plate (2-6) are fixedly installed with stabilizer (2-61) and rack (2-62) respectively, stabilizer (2-61) and rack (2-62) are all slidingly installed in rotating sleeve (2-3), the teeth of rack (2-62) are engagedly connected with gear (2-2), gear (2-2) is between stabilizer (2-61) and rack (2-62), stabilizer (2-61) and rack (2-62) are all parallel with the axial direction of fixed ring (1-1).

4. A piston rod perpendicularity calibration tool as claimed in claim 3, characterized in that The side surface of rotating sleeve (2-3) is fixedly installed with limiting rod (2-7) towards moving plate (2-6), the end of limiting rod (2-7) can be in contact with the side of moving plate (2-6) towards rotating sleeve (2-3), the outside of limiting rod (2-7) is equipped with spring (2-8), both ends of spring (2-8) are fixedly installed on moving plate (2-6) and rotating sleeve (2-3) respectively, both sides of moving plate (2-6) are fixedly installed with extension plate (2-63), extension plate (2-63) is vertically arranged with moving plate (2-6).

5. A piston rod perpendicularity calibration tool as claimed in claim 4, characterized in that The pair of heart assembly (3) comprises a rotating ring (3-1) and a moving ring (3-2), the rotating ring (3-1) is rotatably installed on the opposite surface of the two fixed rings (1-1), the inner diameter of the rotating ring (3-1) is consistent with the inner diameter of the fixed ring (1-1), the sliding rod (2-4) is slidably installed on the rotating ring (3-1), the sliding rod (2-4) is consistent with the radial direction of the rotating ring (3-1), the moving ring (3-2) is arranged on the opposite surface of the two fixed rings (1-1), the outer diameter of the moving ring (3-2) is consistent with the inner diameter of the fixed ring (1-1), and the moving ring (3-2) can be in contact with the extension plate (2-63).

6. A piston rod perpendicularity calibration tool as claimed in claim 5, characterized in that The fixed ring (1-1) is provided with a sliding groove (1-2), the extension rod (2-5) is slidably installed in the sliding groove (1-2), one end of the extension rod (2-5) away from the sliding rod (2-4) penetrates the sliding groove (1-2), and the outer wall of the extension rod (2-5) is slidably installed with a pad (2-51).

7. A piston rod perpendicularity calibration tool as claimed in claim 6, characterized in that The outer wall of the moving ring (3-2) is fixedly installed with a pressing plate (3-3), the pressing plate (3-3) is provided with a through groove (3-4), the extension rod (2-5) is slidably installed in the through groove (3-4), and the pressing plate (3-3) is in contact with the pad (2-51).

8. A piston rod perpendicularity calibration tool as claimed in claim 7, characterized in that The outer wall of the moving ring (3-2) is fixedly installed with a fixed plate (3-5), the end of the fixed plate (3-5) is threadedly connected with a threaded rod (3-6), the end of the threaded rod (3-6) is fixedly installed with a locking block (3-7), and the locking block (3-7) can be in contact with the outer wall of the fixed ring (1-1).

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