Anti-tilting device for piston rod

Abstract

The embodiment of the utility model discloses an anti-tilting device for a piston rod in the technical field of piston rods. Comprising a piston rod stretching out and drawing back in the middle of a cylinder barrel, a first fixing ring block is installed at the upper end of the cylinder barrel, a second fixing ring block is installed at the upper end of the piston rod, a plurality of limiting rods are installed between the first fixing ring block and the second fixing ring block, and an anti-inclination assembly for preventing the piston rod from inclining is installed in the middle of each limiting rod. When the piston rod extends out of the interior of the cylinder barrel to jack up a heavy object, the long rods are synchronously driven to move upwards, the piston rod cannot rotate under limiting of the long rods, then the limiting ring moves upwards from the lower end of the piston rod to a proper position, and the roller always abuts against the inner wall of the piston rod through limiting of the long rods on the limiting ring; when the heavy object presses the piston rod downwards, the piston rod is prevented from deviating, and the situation that the upper end of the cylinder barrel is torn is avoided.

Description

Technical Field

[0001] The utility model embodiment relates to the technical field of piston rods, and in particular to a piston rod anti-tilt device. Background Art

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

[0003] During the use of the hydraulic cylinder, the cylinder is placed vertically and its piston rod moves in the vertical direction. When the piston rod is extended to the top and remains in a suspended state, since the top end of the piston rod is against a heavy object, if the piston rod is not at the center of gravity of the heavy object, the heavy object will also exert an oblique force on the piston rod, causing the piston rod to be at risk of horizontal deviation. That is, the piston rod of the hydraulic cylinder will exert an oblique force on the top of the cylinder barrel when loaded, causing the piston rod to easily deviate and cause tearing at the top of the cylinder barrel of the hydraulic cylinder. Utility Model Content

[0004] To this end, an embodiment of the utility model provides a piston rod anti-tilt device to solve the problem in the prior art that a deviated piston rod easily causes tearing of the top of the cylinder barrel of the hydraulic cylinder.

[0005] In order to achieve the above purpose, the embodiment of the utility model provides the following technical solutions:

[0006] A piston rod anti-tilting device comprises a piston rod which is telescopic in the middle of a cylinder.

[0007] A first fixing ring block is installed at the upper end of the cylinder barrel, and a second fixing ring block is installed at the upper end of the piston rod.

[0008] A plurality of limit rods are installed between the first fixing ring block and the second fixing ring block, and an anti-tilt component for preventing the piston rod from tilting is installed in the middle of the limit rod.

[0009] A plurality of positioning holes for positioning the anti-tilt assembly are vertically opened in the middle of the piston rod.

[0010] The anti-tilt assembly includes a plurality of rollers closely attached to the side walls of the piston rod, and the anti-tilt assembly includes a limiting ring for supporting and limiting the rollers.

[0011] Furthermore, a plurality of first limiting holes for limiting the limiting rod are opened in the middle of the fixing ring block 1, and a plurality of second limiting holes for cooperating with the first limiting hole for limiting the limiting rod are opened in the middle of the fixing ring block 2.

[0012] Furthermore, the limiting holes 1 are equidistantly distributed in the middle of the fixing ring block 1, the limiting holes 2 are equidistantly distributed in the middle of the fixing ring block 2, and the limiting holes 1 and 2 are concentric circles with each other.

[0013] Furthermore, the limiting rod comprises a long rod, and the long rod is in the hole cavity of limiting hole one and limiting hole two, the upper end of the long rod is processed with an external thread, and the upper end of the long rod is installed with a nut for cooperating with the external thread to limit the long rod.

[0014] Furthermore, a limiting ring block three is installed on the upper end of the long rod, and the limiting ring block three is below the fixed ring block two, the nut is above the fixed ring block two, and a limiting block is installed on the bottom end of the long rod, and the limiting block is below the fixed ring block one.

[0015] Furthermore, a rotating shaft for limiting the position of the roller is installed in the middle of the roller, and a plurality of special-shaped blocks for limiting the position of the rotating shaft are installed on the inner wall of the limiting ring, and a threaded hole is opened in the middle of the special-shaped block.

[0016] Furthermore, screw rods are installed at the left and right ends of the limiting ring, and a plurality of limiting holes three for the long rod to slide are opened in the middle of the limiting ring.

[0017] The utility model embodiment has the following advantages:

[0018] When the piston rod extends from the inside of the cylinder to lift the heavy object, it simultaneously drives the long rod to move upward. Under the limitation of the long rod, the piston rod cannot rotate. Then the limiting ring is moved upward from the lower end of the piston rod to a suitable position. The limiting ring is limited by multiple long rods so that the roller always contacts the inner wall of the piston rod. When the heavy object presses down on the piston rod, the piston rod is prevented from deflecting, thereby avoiding tearing of the upper end of the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the installation of the piston rod of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the limit rod of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the anti-tilt component of the utility model.

[0025] In the figure: 100-cylinder, 110-piston rod, 111-positioning hole, 120-fixing ring block 1, 121-limiting hole 1, 130-fixing ring block 2, 131-limiting hole 2;

[0026] 200-limit rod, 210-long rod, 211-external thread, 212-nut, 213-limit ring block three, 214-limit block;

[0027] 300-anti-tilt assembly, 310-roller, 311-rotating shaft, 320-limiting ring, 321-special-shaped block, 322-threaded hole, 323-screw, 324-limiting hole three. DETAILED DESCRIPTION

[0028] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0030] See also Figure 1-Figure 4 The utility model provides a piston rod anti-tilt device.

[0031] It includes a cylinder 100, a limiting rod 200 and an anti-tilt assembly 300, and the middle part of the cylinder 100 is connected to a piston rod 110 that can be telescoped inside the cylinder 100, and the middle part of the piston rod 110 is vertically opened with a plurality of positioning holes 111 for positioning the anti-tilt assembly 300. When limiting the anti-tilt assembly 300, one end of the screw 323 is screwed into the cavity of the positioning hole 111, thereby positioning the height of the anti-tilt assembly 300.

[0032] A fixing ring block 120 is fixedly installed on the upper end of the cylinder 100 , and a plurality of limiting holes 121 for limiting the limiting rod 200 are opened in the middle of the fixing ring block 120 , and the long rod 210 is located in the cavity of the limiting hole 121 .

[0033] The upper end of the piston rod 110 is fixedly mounted with a second fixing ring block 130, and a plurality of second limiting holes 131 are provided in the middle of the second fixing ring block 130 for cooperating with the first limiting hole 121 to limit the limiting rod 200, and the long rod 210 is simultaneously in the cavity of the second limiting hole 131. The first limiting holes 121 are equidistantly distributed in the middle of the first fixing ring block 120, and the second limiting holes 131 are equidistantly distributed in the middle of the second fixing ring block 130, and the first limiting holes 121 and the second limiting holes 131 are concentric circles with each other, so that the long rod 210 limits the piston rod 110 to prevent the piston rod 110 from rotating.

[0034] A plurality of limiting rods 200 are installed between the fixing ring block 120 and the fixing ring block 2 130. The limiting rods 200 include a long rod 210, and the long rod 210 is located in the hole cavity of the limiting hole 121 and the limiting hole 2 131. An external thread 211 is processed on the upper end of the long rod 210, and a nut 212 is installed on the upper end of the long rod 210 for cooperating with the external thread 211 to limit the long rod 210.

[0035] A limiting ring block three 213 is installed at the upper end of the long rod 210, and the limiting ring block three 213 is located below the fixed ring block two 130, and the nut 212 is located above the fixed ring block two 130, and a limiting block 214 is installed at the bottom end of the long rod 210, and the limiting block 214 is located below the fixed ring block one 120.

[0036] The long rod 210 passes through the limiting hole 121 and enters the cavity of the limiting hole 2 131, and is limited by the limiting ring block 3 213. The nut 212 cooperates with the external thread 211 to be screwed into the upper end of the long rod 210, clamping the fixing ring block 2 130, thereby limiting the piston rod 110 to prevent the piston rod 110 from rotating, and at the same time positioning the positioning hole 111, so that the screw 323 can be inserted into the cavity of the positioning hole 111 to position the limiting ring 320.

[0037] An anti-tilt assembly 300 is installed in the middle of the limiting rod 200 to prevent the piston rod 110 from tilting. The anti-tilt assembly 300 includes a plurality of rollers 310 that are tightly attached to the side walls of the piston rod 110. A rotating shaft 311 for limiting the rollers 310 is fixedly installed in the middle of the rollers 310.

[0038] The anti-tilt assembly 300 includes a limiting ring 320 for supporting and limiting the roller 310 , and a plurality of special-shaped blocks 321 for limiting the rotating shaft 311 are fixedly mounted on the inner wall of the limiting ring 320 , and the rotating shaft 311 is movably mounted on both sides of the special-shaped blocks 321 .

[0039] A threaded hole 322 is provided in the middle of the special-shaped block 321, screw rods 323 are installed at the left and right ends of the limiting ring 320, and a plurality of limiting holes 324 for the long rod 210 to slide are provided in the middle of the limiting ring 320.

[0040] When the piston rod 110 extends from the inside of the cylinder 100 to lift the weight, the long rod 210 is simultaneously driven to move upward. Under the limitation of the long rod 210, the piston rod 110 cannot rotate. Then, the limiting ring 320 is moved upward from the lower end of the piston rod 110 to a suitable position, and the screw 323 is rotated so that one end of the screw 323 is screwed into the cavity of the positioning hole 111, and then the height of the limiting ring 320 is positioned. The limiting ring 320 is limited by multiple long rods 210, so that the roller 310 always contacts the inner wall of the piston rod 110. When the heavy object presses down on the piston rod 110, the piston rod 110 is prevented from being offset, so as to avoid tearing at the upper end of the cylinder 100.

[0041] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A piston rod anti-tilt device, comprising a piston rod (110) that is telescopic in the middle of a cylinder (100), characterized in that: A fixing ring block 1 (120) is installed at the upper end of the cylinder barrel (100), and a fixing ring block 2 (130) is installed at the upper end of the piston rod (110); A plurality of limit rods (200) are installed between the fixing ring block 1 (120) and the fixing ring block 2 (130), and an anti-tilt assembly (300) for preventing the piston rod (110) from tilting is installed in the middle of the limit rod (200); A plurality of positioning holes (111) for positioning the anti-tilt assembly (300) are vertically opened in the middle of the piston rod (110); The anti-tilt assembly (300) comprises a plurality of rollers (310) closely attached to the side walls of the piston rod (110), and the anti-tilt assembly (300) comprises a limiting ring (320) for supporting and limiting the rollers (310).

2. A piston rod anti-tilt device according to claim 1, characterized in that: The middle portion of the fixing ring block 1 (120) is provided with a plurality of limiting holes 1 (121) for limiting the limiting rod (200), and the middle portion of the fixing ring block 2 (130) is provided with a plurality of limiting holes 2 (131) for cooperating with the limiting holes 1 (121) to limit the limiting rod (200).

3. A piston rod anti-tilt device according to claim 2, characterized in that: The limiting holes 1 (121) are equidistantly distributed in the middle of the fixing ring block 1 (120), and the limiting holes 2 (131) are equidistantly distributed in the middle of the fixing ring block 2 (130), and the limiting holes 1 (121) and the limiting holes 2 (131) are concentric circles with each other.

4. A piston rod anti-tilt device according to claim 2, characterized in that: The limiting rod (200) comprises a long rod (210), and the long rod (210) is located in the hole cavity of the limiting hole 1 (121) and the limiting hole 2 (131), the upper end of the long rod (210) is processed with an external thread (211), and the upper end of the long rod (210) is installed with a nut (212) for cooperating with the external thread (211) to limit the long rod (210).

5. A piston rod anti-tilt device according to claim 4, characterized in that: A limiting ring block three (213) is installed at the upper end of the long rod (210), and the limiting ring block three (213) is located below the fixed ring block two (130), and the nut (212) is located above the fixed ring block two (130). A limiting block (214) is installed at the bottom end of the long rod (210), and the limiting block (214) is located below the fixed ring block one (120).

6. The piston rod anti-tilt device according to claim 1, characterized in that: A rotating shaft (311) for limiting the position of the roller (310) is installed in the middle of the roller (310), and a plurality of special-shaped blocks (321) for limiting the position of the rotating shaft (311) are installed on the inner wall of the limiting ring (320), and a threaded hole (322) is opened in the middle of the special-shaped block (321).

7. The piston rod anti-tilt device according to claim 4, characterized in that: Screw rods (323) are installed at the left and right ends of the limiting ring (320), and a plurality of limiting holes (324) for the long rod (210) to slide are opened in the middle of the limiting ring (320).

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