Piston rod with anti-rotation structure

Abstract

The utility model discloses a piston rod with an anti-rotation structure, which comprises a piston rod arranged at the output end of an air cylinder, a plurality of convex rods are fixed on the piston rod, a movable sleeve is movably sleeved on the piston rod, and a plurality of stop rods are fixed on the movable sleeve and used for carrying out anti-rotation stop on the convex rods; the movable sleeve is driven to move through a movement driving mechanism mounted on the air cylinder; the movable sleeve is further provided with a friction rotation stopping assembly used for conducting friction rotation stopping on the piston rod. The friction rotation stopping assembly comprises a fixing ring fixed to the movable sleeve, a plurality of threaded holes are formed in the fixing ring, and locking bolts are connected into the threaded holes in a threaded mode. The problems that according to an existing device, the anti-rotation effect on a piston rod is poor through an additionally-arranged annular plate, a limiting block and a fixing rod, rotation stopping and rotation stopping relieving of the piston rod need to be manually operated, and the rotation stopping response speed is low are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of piston rods, in particular to a piston rod with an anti-rotation structure. Background Art

[0002] The piston rod is a connecting component that supports the piston to do work. It is mostly used in oil cylinders and air cylinder motion actuators. It is a moving component that moves frequently and has high technical requirements. Taking the hydraulic cylinder as an example, it is composed of: cylinder barrel, piston rod (oil cylinder rod), piston, and end cover.

[0003] When there is an external force during the operation of the hydraulic push rod, the piston rod will rotate. Traditionally, a guide device is set outside the hydraulic cylinder. Although this can solve this problem, it brings about a bulky and heavy mechanical structure and a high production cost.

[0004] In order to solve the above problems, patent CN218913330U discloses a piston rod with an anti-rotation structure, including a hydraulic cylinder. The piston rod with an anti-rotation structure, through a limiting mechanism, puts an annular plate on the outside of the piston rod body, and makes the limiting block inserted into the slide groove. As the piston rod body rises or falls, the limiting block will slide up and down in the slide groove, thereby limiting the moving direction of the piston rod body so that it can move vertically. In this way, the purpose of anti-rotation of the piston rod can be achieved by only adding an annular plate, a limiting block and a fixed rod. The structure is simple and the production cost is low.

[0005] The prior art has the following defects and shortcomings: the device has poor anti-rotation effect on the piston rod by adding an annular plate, a limit block and a fixed rod, and both the anti-rotation and the release of the piston rod require manual operation, so the anti-rotation response speed is slow. For this reason, we propose a piston rod with an anti-rotation structure. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model provides a piston rod with an anti-rotation structure, which solves the problems that the existing device has a poor anti-rotation effect on the piston rod by adding an annular plate, a limit block and a fixed rod, and that the anti-rotation and release of the piston rod require manual operation and the anti-rotation response speed is slow.

[0007] To achieve the above purpose, the utility model is implemented through the following technical solutions: a piston rod with an anti-rotation structure, comprising a piston rod installed at the output end of a cylinder, a plurality of protruding rods are fixed on the piston rod, a movable sleeve is movably sleeved on the piston rod, and a plurality of stop rods are fixed on the movable sleeve for preventing the protruding rods from rotating;

[0008] The movable sleeve is driven to move by a moving drive mechanism installed on the cylinder;

[0009] The movable sleeve is also provided with a friction anti-rotation assembly for frictionally anti-rotating the piston rod;

[0010] The friction anti-rotation assembly includes a fixed ring on a fixed movable sleeve, a plurality of threaded holes are provided on the fixed ring, the threaded holes are internally threadedly connected to locking bolts, and one end of the locking bolt is rotatably mounted with an arc-shaped friction plate engaged and clamped on the outer peripheral wall of the piston rod through a bearing.

[0011] Preferably, a plurality of the protruding rods are equiangularly distributed on the outer peripheral wall of the piston rod, and the corners of the protruding rods are all processed with arc transitions.

[0012] Preferably, the stop rod and the convex rod exist in pairs in a ratio of 1:2, and the corners of the stop rod are all processed with arc transition.

[0013] Preferably, the mobile driving mechanism includes a hydraulic cylinder fixed on the top of the cylinder, a push rod is installed at the output end of the hydraulic cylinder, one end of the push rod is fixedly connected to the movable sleeve, the push rod is movably inserted into the inside of a first limiting ring fixed on the cylinder, and a limiting assembly is also provided at the bottom of the cylinder for limiting the movable sleeve when it moves.

[0014] Preferably, the limiting assembly comprises a second limiting ring fixed to the bottom of the cylinder and a limiting rod fixed to the movable sleeve, and the limiting rod is movably inserted in the second limiting ring.

[0015] Preferably, the plurality of threaded holes are equiangularly distributed on the fixing ring, and the outer dimensions of the arc-shaped friction plate are matched with the outer diameter of the piston rod.

[0016] Beneficial Effects

[0017] The utility model provides a piston rod with an anti-rotation structure. Compared with the prior art, it has the following advantages:

[0018] Beneficial effects:

[0019] 1. A piston rod with an anti-rotation structure, the piston rod is installed at the output end of the cylinder and is driven by the cylinder to telescope and move to perform work, a convex rod is fixed on the piston rod, a movable sleeve is sleeved on the piston rod, a stop rod is fixed on the movable sleeve, and the movable sleeve is driven to move by a movable driving mechanism, and then when the piston rod is extended by the cylinder to perform work, it may rotate under the action of an external force, and the movable sleeve is driven to move by the movable driving mechanism to drive the stop rod to extend, and when the piston rod is rotated by an external force, the stop rod can be clamped on one side of the convex rod to block and stop the convex rod from rotating, thereby achieving the purpose of preventing the piston rod from rotating. The movable driving mechanism includes a hydraulic cylinder, a push rod, etc. The hydraulic cylinder is driven by electricity, so the operation can be automatically controlled to reduce manual participation, and the anti-rotation effect is good and the anti-rotation response speed is fast.

[0020] 2. The piston rod with an anti-rotation structure is also equipped with a friction anti-rotation assembly on the movable sleeve. The friction anti-rotation assembly includes a fixing ring, a threaded hole, etc. When the piston rod is stopped from rotating, the locking bolt is manually rotated to drive the arc-shaped friction plate to be clamped on the outer wall of the piston rod through the threaded connection of the locking bolt in the threaded hole, thereby utilizing the friction connection between the arc-shaped friction plate and the outer wall of the piston rod. When the piston rod is subjected to external force due to friction, it is stopped when it rotates, so that the automatic stop cooperates with the manual auxiliary stop to prevent the piston rod from rotating, and the anti-rotation effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from the first viewing angle;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from a second viewing angle;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the utility model from a third viewing angle;

[0024] Figure 4 It is a schematic diagram of the cross-sectional structure of the fixing ring of the utility model.

[0025] In the figure: 1. cylinder; 2. piston rod; 3. cam; 4. movable sleeve; 5. stop rod; 6. mobile drive mechanism; 61. hydraulic cylinder; 62. push rod; 63. first limit ring; 64. limit assembly; 641. second limit ring; 642. limit rod; 7. friction stop assembly; 71. fixing ring; 72. threaded hole; 73. locking bolt; 74. arc-shaped friction plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-4 , the utility model provides two technical solutions:

[0028] Embodiment 1:

[0029] A piston rod with an anti-rotation structure comprises a piston rod 2 mounted at the output end of a cylinder 1, a plurality of protruding rods 3 are fixed on the piston rod 2, a movable sleeve 4 is movably sleeved on the piston rod 2, a plurality of stopper rods 5 are fixed on the movable sleeve 4 for preventing the protruding rods 3 from rotating;

[0030] The movable sleeve 4 is driven to move by a moving drive mechanism 6 installed on the cylinder 1;

[0031] The movable sleeve 4 is also provided with a friction anti-rotation assembly 7 for frictionally anti-rotating the piston rod 2;

[0032] The friction anti-rotation assembly 7 includes a fixed ring 71 fixed on the movable sleeve 4, and a plurality of threaded holes 72 are provided on the fixed ring 71. The threaded holes 72 are internally threadedly connected to locking bolts 73. One end of the locking bolt 73 is rotatably mounted with an arc-shaped friction plate 74 that is engaged and clamped on the outer peripheral wall of the piston rod 2 through a bearing.

[0033] Embodiment 2:

[0034] The main difference from the first embodiment is:

[0035] A piston rod with an anti-rotation structure, a plurality of convex rods 3 are distributed at equal angles on the outer peripheral wall of the piston rod 2, and the corners of the convex rods 3 are all treated with arc transitions. When the piston rod 2 is rotated by an external force, the stop rod 5 is clamped on one side of the convex rod 3 to block and stop the convex rod 3, and the arc transition treatment reduces the friction damage when colliding with the stop rod 5; the stop rod 5 and the convex rod 3 exist in pairs in a 1:2 ratio, and the corners of the stop rod 5 are all treated with arc transitions. When the piston rod 2 is rotated by an external force, the stop rod 5 is clamped on one side of the convex rod 3 to block and stop the convex rod 3, and the arc transition treatment reduces the friction damage when colliding with the convex rod 3; the mobile driving mechanism 6 includes a hydraulic cylinder 61 fixed on the top of the cylinder 1, and a push rod 62 is installed at the output end of the hydraulic cylinder 61. One end of the push rod 62 is fixedly connected to the movable sleeve 4, and the push rod 62 is movably inserted into the first limit ring 63 fixed on the cylinder 1. A limit assembly 64 is also provided at the bottom of the cylinder 1 for The movable sleeve 4 is limited when it moves. Starting the hydraulic cylinder 61 can drive the push rod 62 to move and drive the movable sleeve 4 to move, thereby driving the stop rod 5 to move; the limiting assembly 64 includes a second limiting ring 641 fixed at the bottom of the cylinder 1 and a limiting rod 642 fixed on the movable sleeve 4. The limiting rod 642 is movably inserted in the second limiting ring 641. The limiting rod 642 is movably inserted in the second limiting ring 641 to limit the movable sleeve 4 when it moves to prevent deflection; a plurality of threaded holes 72 are circumferentially distributed at equal angles on the fixed ring 71, and the outer dimensions of the arc-shaped friction plate 74 are adapted to the outer diameter of the piston rod 2. The locking bolt 73 is manually rotated and the locking bolt 73 is threadedly connected in the threaded hole 72 to drive the arc-shaped friction plate 74 to be clamped on the outer peripheral wall of the piston rod 2, so that the arc-shaped friction plate 74 is frictionally connected to the outer wall of the piston rod 2, and the piston rod 2 is stopped when it rotates when it is subjected to external force through friction.

[0036] When the piston rod with an anti-rotation structure is in use, the piston rod 2 is installed at the output end of the cylinder 1 and is driven by the cylinder 1 to telescope and move to do work. By fixing the convex rod 3 on the piston rod 2, a movable sleeve 4 is sleeved on the piston rod 2, and a stop rod 5 is fixed on the movable sleeve 4. The movable sleeve 4 is driven to move by a movable driving mechanism 6. When the piston rod 2 is extended and driven by the cylinder 1 to do work, it may rotate under the action of an external force. The movable sleeve 4 is driven by the movable driving mechanism 6 to move and drive the stop rod 5 to extend. When the piston rod 2 is rotated by an external force, the stop rod 5 can be clamped on one side of the convex rod 3 to block and stop the convex rod 3 from rotating, thereby achieving the purpose of preventing the piston rod 2 from rotating. The movable driving mechanism 6 includes a hydraulic cylinder 61 and a push rod 62. The hydraulic cylinder 61 is driven by electricity, so the operation can be automatically controlled, reducing manual participation, and has a good anti-rotation effect and a fast anti-rotation response speed. In addition, a friction anti-rotation assembly 7 is also installed on the movable sleeve 4 of the utility model. The friction anti-rotation assembly 7 includes a fixing ring 71, a threaded hole 72, etc. When the piston rod 2 is stopped from rotating, the locking bolt 73 is manually rotated and the locking bolt 73 is threadedly connected in the threaded hole 72 to drive the arc-shaped friction plate 74 to be clamped on the outer peripheral wall of the piston rod 2, so that the arc-shaped friction plate 74 is frictionally connected with the outer wall of the piston rod 2. When the piston rod 2 is subjected to external force during friction, it is stopped when it rotates, so that the automatic stop cooperates with the manual auxiliary stop to prevent the piston rod 2 from rotating, and the anti-rotation effect is good.

[0037] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A piston rod with an anti-rotation structure, comprising a piston rod (2) mounted at an output end of a cylinder (1), characterized in that: A plurality of protruding rods (3) are fixed on the piston rod (2), a movable sleeve (4) is movably sleeved on the piston rod (2), and a plurality of stop rods (5) are fixed on the movable sleeve (4) for preventing the protruding rods (3) from rotating; The movable sleeve (4) is driven to move by a moving drive mechanism (6) installed on the cylinder (1); The movable sleeve (4) is also provided with a friction anti-rotation assembly (7) for frictionally anti-rotating the piston rod (2); The friction anti-rotation assembly (7) comprises a fixing ring (71) fixed on the movable sleeve (4), a plurality of threaded holes (72) are provided on the fixing ring (71), the threaded holes (72) are internally threadedly connected to locking bolts (73), and one end of the locking bolt (73) is rotatably mounted via a bearing with an arc-shaped friction plate (74) engaged and clamped on the outer peripheral wall of the piston rod (2).

2. The piston rod with an anti-rotation structure according to claim 1, characterized in that: The plurality of protruding rods (3) are equiangularly distributed on the outer peripheral wall of the piston rod (2), and the corners of the protruding rods (3) are all subjected to arc transition treatment.

3. The piston rod with an anti-rotation structure according to claim 1, characterized in that: The stop rod (5) and the protruding rod (3) exist in pairs in a ratio of 1:2, and the corners of the stop rod (5) are all processed with arc transitions.

4. The piston rod with an anti-rotation structure according to claim 1, characterized in that: The mobile drive mechanism (6) comprises a hydraulic cylinder (61) fixed on the top of the cylinder (1); a push rod (62) is installed at the output end of the hydraulic cylinder (61); one end of the push rod (62) is fixedly connected to the movable sleeve (4); the push rod (62) is movably inserted into a first limiting ring (63) fixed on the cylinder (1); and a limiting component (64) is also provided at the bottom of the cylinder (1) for limiting the position of the movable sleeve (4) when it moves.

5. The piston rod with an anti-rotation structure according to claim 4, characterized in that: The limiting assembly (64) comprises a second limiting ring (641) fixed to the bottom of the cylinder (1) and a limiting rod (642) fixed to the movable sleeve (4); the limiting rod (642) is movably inserted into the second limiting ring (641).

6. The piston rod with an anti-rotation structure according to claim 1, characterized in that: The plurality of threaded holes (72) are equiangularly distributed on the fixing ring (71), and the outer dimensions of the arc-shaped friction plate (74) are matched to the outer diameter of the piston rod (2).

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