Anti-loosening fastening assembly on hydraulic cylinder piston rod

Abstract

The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to an anti-loosening fastening assembly on a piston rod of a hydraulic cylinder, which comprises a bearing rod and a piston, the bearing rod comprises an outer end, a cylinder, a piston mounting head and a positioning seat, a fastening assembly is mounted between the piston mounting head and the positioning seat, and the fastening assembly comprises a rod body and a locking part. When the locking component is nailed into the piston mounting head, the screwdriver extends into the force application groove and rotates, the tip of the rod body extends into the piston mounting head and abuts against the positioning seat, and the rod body, the connecting rod and the screw rod sequentially extend into the piston mounting head. The elastic plate is ejected out of the groove position through the rotating shaft and is clamped and fixed with the piston mounting head, then the movable pipe arranged on the screw is rotated with the screw, and the movable pipe is attached to the piston mounting head; compared with the prior art, firmness between the piston mounting head and the positioning seat is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, and more specifically to an anti-loosening fastening component on a piston rod of a hydraulic cylinder. Background Art

[0002] The piston rod is an actuator with telescopic function in a pneumatic cylinder or a hydraulic cylinder. The motion mechanism transmits the kinetic energy of the motor to the piston rod to drive the piston to reciprocate in the cylinder, thereby changing the volume of the medium gas in the cylinder and increasing the pressure of the gas. Some piston rods are also screwed with positioning nuts to adjust the stroke of the piston rod.

[0003] For example, the anti-rotation hydraulic cylinder piston rod structure disclosed in application publication number N 107366654 A includes a rod body and a piston; the rod body includes an outer end, a cylindrical tube, a piston mounting head and a positioning seat; the piston mounting head is cylindrical, with a step-shaped stop opening at its right end and a threaded hole at the center of the right end face; the piston is sleeved on the stop opening of the piston mounting head; the positioning seat is cylindrical, with a threaded column at the left end of the positioning seat, and the threaded column of the positioning seat is installed in the threaded hole of the piston mounting head; an extension section is provided at the right end of the piston; a threaded hole is opened on the extension section, and a limiting screw is installed in the threaded hole of the extension section; a through hole opposite to the threaded hole of the extension section is opened on the piston mounting head, and the inner end of the limit screw passes through the through hole of the piston mounting head and abuts against the threaded column of the positioning seat.

[0004] In the above, the limit screw is used to prevent the rotation of the piston to limit the loosening of the piston mounting head and the sensing hole seat. After long-term use, since there is no structure on the outer wall of the limit screw, the limit screw, the mounting head and the positioning seat may become loose, making the limit screw, the mounting head and the positioning seat not firm, thereby affecting the working accuracy. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model aims to provide an anti-loosening fastening assembly on a hydraulic cylinder piston rod which improves the firmness between a piston mounting head and a positioning seat.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A loosening prevention fastening assembly on a hydraulic cylinder piston rod comprises a rod body and a locking component, the locking component comprises a screw and a nut connected to the screw, the nut is provided with a force groove, the screw and the outer wall of the rod body are provided with external threads, the rod body and the screw are connected by a connecting rod, the two ends of the screw are respectively connected to one end of the connecting rod and the nut, the diameters of the rod body and the screw are both larger than the diameter of the connecting rod, a slot is provided on the connecting rod, a rotating shaft is provided in the slot, the two ends of the rotating shaft are respectively connected to the slot, an elastic plate is sleeved on the rotating shaft, the elastic plate is elastic, and the elastic plate is rotatably connected to the rotating shaft.

[0008] The utility model is further configured as follows: a movable tube is sleeved on the screw rod, and the movable tube is spirally connected to the screw rod.

[0009] The utility model is further configured as follows: a blind hole is provided on the movable tube, and an internal thread spirally connected to the external thread is provided on the inner wall of the blind hole.

[0010] The utility model is further configured as follows: a plurality of fixing rods are arranged on the outer wall of the movable tube, and the fixing rods are fixedly connected to the movable tube.

[0011] The utility model is further configured as follows: a fixing groove for one end of the fixing rod to extend into is opened on the outer wall of the movable tube.

[0012] By adopting the above technical solution, the beneficial effects of the utility model are:

[0013] When the locking component is nailed into the piston mounting head, the screwdriver is inserted into the force groove and rotated, and the tip of the rod body is inserted into the piston mounting head and contacts the positioning seat, so that the rod body, the connecting rod and the screw rod are sequentially inserted into the piston mounting head. Since an elastic elastic plate is installed on the connecting rod, when the connecting rod is placed in the piston mounting head, the elastic plate pops out from the groove through the rotating shaft and is fixed with the piston mounting head. When the movable tube placed on the screw rod is rotated with the screw rod, the movable tube and the piston mounting head are fitted, thereby improving the firmness between the piston mounting head and the positioning seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 An exploded view of the utility model between the rod body and the locking component;

[0015] Figure 2 A cross-sectional view of an embodiment of the utility model;

[0016] Figure 3 It is a structural schematic diagram of an embodiment of the utility model.

[0017] Rod body 1, locking component 2, screw 3, nut 4, connecting rod 5, slot 6, elastic plate 7, rotating shaft 8, movable tube 9, blind hole 10, external thread 11, internal thread 12, force groove 13, fixing rod 14, supporting rod 15, outer end 16, cylindrical tube 17, piston mounting head 18, positioning seat 19, piston 20. DETAILED DESCRIPTION

[0018] 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.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] like Figures 1 to 3 As shown, the anti-loosening fastening assembly on the hydraulic cylinder piston rod includes a supporting rod 15 and a piston 20 installed at the end of the supporting rod 15. The supporting rod 15 includes an outer end 16, a cylindrical tube 17, a piston mounting head 18 and a positioning seat 19, and a fastening assembly is installed between the piston mounting head 18 and the positioning seat 19.

[0021] The fastening assembly includes a rod body 1 and a locking component 2. The locking component 2 includes a screw rod 3 and a nut 4 connected to the screw rod 3. The nut 4 is provided with a force application groove 13. The screw rod 3 and the outer wall of the rod body 1 are both provided with external threads 11.

[0022] The rod body 1 and the screw rod 3 are connected by a connecting rod 5, and the two ends of the screw rod 3 are respectively connected to one end of the connecting rod 5 and a nut 4. The diameters of the rod body 1 and the screw rod 3 are larger than the diameter of the connecting rod 5. A slot 6 is provided on the connecting rod 5, and a rotating shaft 8 is installed in the slot 6. The two ends of the rotating shaft 8 are respectively connected to the slot 6. An elastic plate 7 is sleeved on the rotating shaft 8. The elastic plate 7 is elastic and is rotatably connected to the rotating shaft 8.

[0023] Since the diameters of the rod body 1 and the screw rod 3 are both larger than the diameter of the connecting rod 5 , there is space for the elastic plate 7 to pop out from the groove 6 , so that the elastic plate 7 is engaged and fixed with the piston mounting head 18 .

[0024] A movable tube 9 is sleeved on the screw rod 3, and the movable tube 9 is spirally connected to the screw rod 3. A blind hole 10 is provided on the movable tube 9, and an internal thread 12 spirally connected to the external thread 11 is installed on the inner wall of the blind hole 10. A fixing groove for one end of a fixing rod 14 to extend into is provided on the outer wall of the movable tube 9. There are four fixing grooves, and fixing rods 14 are installed in the fixing grooves. One end of the fixing rod 14 is welded and fixed to the outer wall of the movable tube 9.

[0025] The four fixed rods 14 are rotated to drive the movable tube 9 to rotate, so that the movable tube 9 and the screw rod 3 also perform spiral rotation.

[0026] Working principle: when the locking component 2 is nailed into the piston mounting head 18, the screwdriver is inserted into the force groove and rotated, the tip of the rod body 1 is inserted into the piston mounting head 18 and contacts the positioning seat 19, so that the rod body 1, the connecting rod 5 and the screw 3 are inserted into the piston mounting head 18 in sequence. Since an elastic elastic plate 7 is installed on the connecting rod 5, when the connecting rod 5 is placed in the piston mounting head 18, the elastic plate 7 pops out from the groove 6 through the rotating shaft 8 and is fixed with the inner wall of the piston mounting head 18. When the movable tube 9 placed on the screw 3 is rotated with the screw 3, the movable tube 9 fits with the piston mounting head 18, thereby improving the firmness between the piston mounting head 18 and the positioning seat 19.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any common changes and substitutions made by those skilled in the art within the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-loosening fastening assembly on a hydraulic cylinder piston rod, characterized in that: It comprises a rod body (1) and a locking component (2). The locking component (2) comprises a screw rod (3) and a nut (4) connected to the screw rod (3). A force application groove (13) is provided on the nut (4), and external threads (11) are provided on the outer walls of the screw rod (3) and the rod body (1). The rod body (1) and the screw rod (3) are connected via a connecting rod (5). The two ends of the screw rod (3) are respectively connected to one end of the connecting rod (5) and the nut (4); the diameters of the rod body (1) and the screw rod (3) are both larger than the diameter of the connecting rod (5). The connecting rod (5) is provided with a slot (6), and a rotating shaft (8) is provided in the slot (6). The two ends of the rotating shaft (8) are respectively connected to the slots (6), and an elastic plate (7) is sleeved on the rotating shaft (8). The elastic plate (7) is elastic, and the elastic plate (7) is rotatably connected to the rotating shaft (8).

2. The anti-loosening fastening assembly on the hydraulic cylinder piston rod according to claim 1, characterized in that: The screw rod (3) is sleeved with a movable tube (9), and the movable tube (9) is spirally connected to the screw rod (3).

3. The anti-loosening fastening assembly on the hydraulic cylinder piston rod according to claim 2, characterized in that: The movable tube (9) is provided with a blind hole (10), and the inner wall of the blind hole (10) is provided with an internal thread (12) which is spirally connected to the external thread (11).

4. The anti-loosening fastening assembly on the hydraulic cylinder piston rod according to claim 2, characterized in that: A plurality of fixing rods (14) are provided on the outer wall of the movable tube (9), and the fixing rods (14) are fixedly connected to the movable tube (9).

5. The anti-loosening fastening assembly on the piston rod of a hydraulic cylinder according to claim 4, characterized in that: The outer wall of the movable tube (9) is provided with a fixing groove into which one end of the fixing rod (14) extends.

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