Piston rod follow-up anti-rotation positioning structure for horizontal oil cylinder

Abstract

The utility model discloses a piston rod follow-up anti-rotation positioning structure for a horizontal oil cylinder, and relates to the technical field of oil cylinders, the piston rod follow-up anti-rotation positioning structure comprises a mounting ring, a connecting ring is fixedly connected to the center of the top of the mounting ring, the axis of the mounting ring and the axis of the connecting ring coincide, and the mounting ring and the connecting ring are provided with coaxial through mounting holes; a plurality of connecting seats are distributed at the top of the connecting ring at equal intervals in the circumferential direction, the top of each connecting seat is rotationally connected with a connecting rod through a first rotating shaft, the upper section of each connecting rod is bent in the axis direction of the mounting ring, and the end of each connecting rod is rotationally connected with a directional pulley through a second rotating shaft. According to the piston rod follow-up anti-rotation positioning structure for the horizontal oil cylinder, the multiple directional pulleys are driven through the multiple connecting rods, rotation of the piston rod can be effectively limited, the piston rod is prevented from rotating in the oil cylinder, meanwhile, the fixing sleeve can adjust the rotating angle of the connecting rods, the piston rod follow-up anti-rotation positioning structure adapts to piston rods with different diameters, and the universality and flexibility of a device are improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders are used to generate linear motion in hydraulic systems, but sometimes the piston rod may rotate due to torque or other external forces, which can affect accuracy or even damage the equipment. Therefore, it is necessary to limit the rotation of the piston rod.

[0003] To overcome the aforementioned defects, the prior art (Chinese patent CN208040819U) discloses an anti-rotation structure for a hydraulic cylinder piston rod. An anti-rotation block is installed at the piston end of the piston rod. The inner hole of the anti-rotation block mates with the oil pipe and will not rotate around the inner hole. The oil pipe is fixed to the cylinder barrel to ensure that the piston rod will not rotate during the reciprocating motion of the hydraulic cylinder. The inner hole of the anti-rotation block is square, and this square inner hole mates with a square oil pipe, which is welded and fixed to the cylinder barrel. By installing an anti-rotation block at the piston end of the piston rod, and ensuring that the inner hole of the anti-rotation block mates with the oil pipe and will not rotate around the inner hole, and that the oil pipe is fixed to the cylinder barrel to ensure that the piston rod will not rotate during the reciprocating motion of the hydraulic cylinder, the industry problem is solved.

[0004] While existing technologies can overcome the shortcomings mentioned above, other problems still exist during their operation: current anti-rotation schemes for hydraulic cylinder piston rods typically employ a polygonal cross-section design, achieving the anti-rotation function by setting matching polygonal through holes on the fixed block. However, since most hydraulic cylinder telescopic ends use a standard cylindrical structure, this type of anti-rotation scheme based on polygonal fit lacks adaptability and is difficult to effectively restrict its circumferential rotation. Utility Model Content

[0005] The purpose of this invention is to provide a piston rod follow-up anti-rotation positioning structure for horizontal hydraulic cylinders, in order to solve the problem that most hydraulic cylinder telescopic ends adopt a standard cylindrical structure, and the anti-rotation scheme based on polygonal fit has insufficient adaptability.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder, including a mounting ring, wherein a connecting ring is fixedly connected to the top center position of the mounting ring, and the axes of the mounting ring and the connecting ring coincide and are provided with a coaxial through mounting hole;

[0007] The top of the connecting ring has multiple connecting seats evenly distributed along the circumference. Each connecting seat is rotatably connected to a connecting rod via a first rotating shaft. The upper section of the connecting rod is bent toward the axis of the mounting ring, and the end is rotatably connected to a directional pulley via a second rotating shaft.

[0008] Preferably, the first rotating shaft includes a connecting shaft disposed in the connecting seat, the connecting shaft being fixedly connected to the lower end of the connecting rod, and a torsion spring providing radial preload is provided at the rotating joint between the connecting shaft and the connecting seat.

[0009] Preferably, the outer wall of the connecting ring is provided with a connecting thread, and a fixing sleeve is screwed onto the connecting thread. The top of the fixing sleeve is provided with an inner flange bent in the axial direction, and the inner flange forms a sliding fit with the outer side of each connecting rod.

[0010] Preferably, the outer side of the mounting ring is fixedly connected to a ring-shaped guide rail, and both sides of the guide rail are provided with guide grooves.

[0011] Preferably, a fixing seat is fixedly connected to the top of the end of the guide rail away from the connecting ring, and the fixing seat is provided with a threaded hole inside, and a slide bar is slidably connected inside the guide rail.

[0012] Preferably, both ends of the slider are slidably connected inside the guide groove, and the end of the slider away from the guide rail is fixedly connected to a vertically distributed clamp.

[0013] Preferably, the end of the slide bar away from the guide rail is fixedly connected to a vertically distributed mounting ear, and a locking bolt is rotatably connected inside the mounting ear, and the locking bolt passes through the mounting ear and is threaded into the threaded hole of the fixing seat.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This is a piston rod follow-up anti-rotation positioning structure for horizontal hydraulic cylinders. Through multi-link drive of multiple directional pulleys, it can effectively limit the rotation of the piston rod and prevent it from rotating inside the hydraulic cylinder. At the same time, the fixed sleeve can adjust the rotation angle of the connecting rod to adapt to piston rods of different diameters, improving the versatility and flexibility of the device.

[0016] The device is securely clamped and fixed using guide rails, slide bars, and clamping plates. It can accommodate hydraulic cylinders of different sizes and can be quickly installed and fixed by adjusting the locking bolts, improving the convenience and reliability of use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the connecting rod structure of this utility model;

[0020] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0021] Figure 5 This is a schematic diagram of the guide rail structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the slider structure of this utility model.

[0023] In the diagram: 1. Mounting ring; 2. Connecting ring; 3. Connecting seat; 4. Connecting rod; 5. Connecting shaft; 6. Torsion spring; 7. Directional pulley; 8. Connecting thread; 9. Fixing sleeve; 10. Guide rail; 11. Guide groove; 12. Fixing seat; 13. Sliding bar; 14. Clamping plate; 15. Mounting ear; 16. Locking bolt. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figure 1 - Figure 4 The present invention provides the following technical solution: a piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder, including a mounting ring 1, a connecting ring 2 fixedly connected to the center of the top of the mounting ring 1, the axes of the mounting ring 1 and the connecting ring 2 coincide and are provided with coaxial through mounting holes; multiple connecting seats 3 are evenly distributed around the top of the connecting ring 2, and a connecting rod 4 is rotatably connected to the top of each connecting seat 3 through a first rotating shaft, the upper section of the connecting rod 4 is bent toward the axis of the mounting ring 1, and the end is rotatably connected to a directional pulley 7 through a second rotating shaft, the first rotating shaft includes a connecting shaft 5 provided in the connecting seat 3, the connecting shaft 5 is fixedly connected to the lower end of the connecting rod 4, a torsion spring 6 providing radial preload is provided at the rotating joint of the connecting shaft 5 and the connecting seat 3, the outer wall of the connecting ring 2 is provided with a connecting thread 8, and a fixing sleeve 9 is screwed onto the connecting thread 8, the top of the fixing sleeve 9 is provided with an inwardly bent flange in the axial direction, and the inwardly bent flange forms a sliding fit with the outer side of each connecting rod 4.

[0026] When using the device, first slide the mounting ring 1, connecting ring 2 and fixing sleeve 9 onto the outside of the cylinder piston rod until the mounting ring 1 is fixed to the end of the cylinder. At this time, the piston rod will be located between the mounting ring 1, connecting ring 2 and fixing sleeve 9.

[0027] After the mounting ring 1 is fixed, the fixing sleeve 9 is located outside the directional pulley 7, and the inner side of the fixing sleeve 9 is connected to the outer side of the connecting ring 2. At this time, the fixing sleeve 9 is rotated to make it rotate outside the connecting ring 2. The fixing sleeve 9 will move downward outside the connecting ring 2. Since the inner flange formed at the top of the fixing sleeve 9 is in contact with the outer side of the connecting rod 4, the fixing sleeve 9 will drive the connecting rod 4 to rotate towards the inner side of the center of the mounting ring 1 during the downward movement.

[0028] Multiple connecting rods 4 are simultaneously driven by fixed sleeves 9 to rotate around the connecting seat 3 toward the center of the mounting ring 1. At this time, the directional pulley 7 installed on the upper end of the connecting rod 4 will contact the outer side of the cylinder piston. Since the rotation direction of the directional pulley 7 is parallel to the piston rod, the movement of the piston rod during extension and retraction will not be affected. Furthermore, by having multiple directional pulleys 7 in contact with the outer side of the piston rod, its rotation is restricted, preventing it from rotating inside the cylinder. Moreover, the closer the fixed sleeve 9 is to the mounting ring 1, the greater the angle at which it drives the connecting rod 4 to rotate, thus adapting to pistons of different diameters.

[0029] Example 2: Based on Example 1, please refer to... Figure 5 and Figure 6 The following structure is also disclosed: A ring-shaped guide rail 10 is fixedly connected to the outer side of the mounting ring 1, and guide grooves 11 are provided on both sides of the guide rail 10; a fixed seat 12 is fixedly connected to the top of the end of the guide rail 10 away from the connecting ring 2, and a threaded hole is provided inside the fixed seat 12; a slide bar 13 is slidably connected inside the guide rail 10; both ends of the slide bar 13 are slidably connected inside the guide grooves 11, and a vertically distributed clamping plate 14 is fixedly connected to the end of the slide bar 13 away from the guide rail 10; a vertically distributed mounting ear 15 is fixedly connected to the end of the slide bar 13 away from the guide rail 10, and a locking bolt 16 is rotatably connected inside the mounting ear 15, and the locking bolt 16 passes through the mounting ear 15 and is threaded into the threaded hole of the fixed seat 12.

[0030] When the mounting ring 1, connecting ring 2, and fixing sleeve 9 are fitted onto the outside of the piston, the fixing sleeve 9 drives the directional pulley 7 to contact the piston rod. Since multiple connecting rods 4 move synchronously, the directional pulley 7 at the upper end of the connecting rod 4 will drive the piston rod to the middle position of the mounting ring 1. At this time, the locking bolt 16 is rotated, causing the locking bolt 16 to move inside the fixing seat 12, thereby driving the slide bar 13 to slide inside the guide rail 10. The slide bar 13 drives the clamping plate 14 to fit against the outer side of the cylinder end, and the multiple clamping plates 14 form a clamping process to fix the device. The adjustable setting of the slide bar 13 makes it easy to use cylinders of different sizes.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder, comprising a mounting ring (1), wherein a connecting ring (2) is fixedly connected to the top center position of the mounting ring (1), the axes of the mounting ring (1) and the connecting ring (2) coincide and are provided with a coaxial through mounting hole; Its features are: The top of the connecting ring (2) has multiple connecting seats (3) evenly distributed along the circumference. The top of each connecting seat (3) is rotatably connected to a connecting rod (4) via a first rotating shaft. The upper section of the connecting rod (4) is bent toward the axis of the mounting ring (1), and the end is rotatably connected to a directional pulley (7) via a second rotating shaft.

2. The piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder according to claim 1, characterized in that: The first rotating shaft includes a connecting shaft (5) disposed in the connecting seat (3), the connecting shaft (5) being fixedly connected to the lower end of the connecting rod (4), and a torsion spring (6) providing radial preload is provided at the rotating joint between the connecting shaft (5) and the connecting seat (3).

3. The piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder according to claim 2, characterized in that: The outer wall of the connecting ring (2) is provided with a connecting thread (8), and a fixing sleeve (9) is screwed onto the connecting thread (8). The top of the fixing sleeve (9) is provided with an inner flange bent in the axial direction, and the inner flange forms a sliding fit with the outer side of each connecting rod (4).

4. The piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder according to claim 1, characterized in that: The mounting ring (1) is fixedly connected to a ring-shaped guide rail (10) on the outside, and the guide rail (10) has guide grooves (11) on both sides inside.

5. A piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder according to claim 4, characterized in that: The top of the guide rail (10) away from the connecting ring (2) is fixedly connected to a fixed seat (12), and the fixed seat (12) is provided with a threaded hole. The guide rail (10) is slidably connected to a slide bar (13).

6. A piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder according to claim 5, characterized in that: Both ends of the slide bar (13) are slidably connected to the inside of the guide groove (11), and the end of the slide bar (13) away from the guide rail (10) is fixedly connected to a vertically distributed clamping plate (14).

7. A piston rod follow-up anti-rotation positioning structure for a horizontal hydraulic cylinder according to claim 6, characterized in that: The slide bar (13) is fixedly connected to a vertically distributed mounting ear (15) at one end away from the guide rail (10), and a locking bolt (16) is rotatably connected inside the mounting ear (15), and the locking bolt (16) passes through the mounting ear (15) and is threaded into the threaded hole of the fixing seat (12).

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