CN215521466U

CN215521466U - Hydraulic cylinder piston rod welded structure

Info

Publication number: CN215521466U
Application number: CN202121918250.5U
Authority: CN
Inventors: 钟琦; 张建亮; 唐娟
Original assignee: Hubei Wanbang Hydraulic Equipment Co ltd
Current assignee: Hubei Wanbang Hydraulic Equipment Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-01-14
Anticipated expiration: 2031-08-16

Abstract

The utility model discloses a hydraulic cylinder piston rod welding structure, which relates to the technical field of hydraulic cylinders and comprises a piston rod and a connecting sleeve, wherein the connecting sleeve is of a split structure and comprises a front sleeve and a rear sleeve which are connected; the rear sleeve is provided with a plurality of positioning holes; the piston rod is provided with a plurality of key grooves which correspond to the positioning holes one by one, and limiting flat keys are arranged in the key grooves; the upper ends of the limiting flat keys extend into the positioning holes and are connected together through plug welding. The utility model can effectively improve the welding deformation, ensure the processing precision and ensure the stable work of the movable floor mechanism.

Description

Hydraulic cylinder piston rod welded structure

Technical Field

The utility model relates to the technical field of hydraulic cylinders, in particular to a welding structure of a piston rod of a hydraulic cylinder.

Background

The double-acting hydraulic cylinder for the movable floor mechanism has a welded structure of a piston rod assembly, a piston rod is in small clearance fit with a connecting sleeve, the outer diameter of the sleeve is connected with a movable beam, and the required welding line strength is high.

Referring to fig. 1, a conventional piston rod and a sleeve are welded by using a plug weld. The threaded part of the connecting sleeve plays a role in positioning and adjusting. The structure has the following defects: the piston rod has small diameter, long length and large welding amount of welding seams, and is easy to deform. The connecting sleeve is of an integral structure, the material cost is high, and the processing technology is complex.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects in the prior art, the utility model aims to provide a hydraulic cylinder piston rod welding structure which can effectively improve welding deformation, ensure machining precision and ensure that a movable floor mechanism works stably.

In order to achieve the above purposes, the technical scheme adopted by the utility model is as follows: a hydraulic cylinder piston rod welding structure comprises a piston rod and a connecting sleeve, wherein the connecting sleeve is of a split structure and comprises a front sleeve and a rear sleeve which are connected; the rear sleeve is provided with a plurality of positioning holes; the piston rod is provided with a plurality of key grooves which correspond to the positioning holes one by one, and limiting flat keys are arranged in the key grooves; the upper ends of the limiting flat keys extend into the positioning holes and are connected together through plug welding.

The further improvement lies in that: the positioning holes are divided into two groups and are oppositely arranged on two sides of the rear sleeve; each group of positioning holes comprises 3 positioning holes arranged along the axial direction.

The further improvement lies in that: the positioning hole is of a waist-round structure.

The further improvement lies in that: the length of the positioning hole in the middle is larger than the length of the positioning holes on the two sides.

The further improvement lies in that: two positioning convex rings are arranged on the outer wall of the rear sleeve.

The further improvement lies in that: the positioning convex ring is arranged between two adjacent positioning holes.

The further improvement lies in that: the front sleeve and the rear sleeve are connected in a welding mode.

The utility model has the beneficial effects that:

in the utility model, the structure of the piston rod connecting sleeve is improved, the whole structure is changed into a split structure, and the material cost is reduced; the welding process is improved, the flat key is adopted for connecting and positioning, the welding deformation is reduced by post-welding processing, and the processing precision of the piston rod is better ensured. The stable operation of the whole mechanism is ensured.

Drawings

FIG. 1 is a schematic structural diagram of a piston rod and a sleeve in the prior art;

FIG. 2 is a schematic structural diagram of a hydraulic cylinder piston rod welding structure according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a piston rod according to an embodiment of the present invention.

Reference numerals:

1-a piston rod; 11-a keyway; 2-a front sleeve; 3-rear sleeve; 31-a positioning hole; 32-positioning convex ring; 4-limiting flat key; 41-plug welding.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate that the orientation and positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present invention.

The technical scheme and the beneficial effects of the utility model are clearer and clearer by further describing the specific embodiment of the utility model with the accompanying drawings of the specification. The embodiments described below are exemplary and are intended to be illustrative of the utility model, but are not to be construed as limiting the utility model.

Referring to fig. 2 and 3, an embodiment of the present invention provides a hydraulic cylinder piston rod welding structure, including a piston rod 1 and a connecting sleeve, where the connecting sleeve is a split structure, and includes a front sleeve 2 and a rear sleeve 3 connected to each other; specifically, the front sleeve 2 and the rear sleeve 3 are welded. The rear sleeve 3 is provided with a plurality of positioning holes 31; the piston rod 1 is provided with a plurality of key grooves 11 which are in one-to-one correspondence with the positioning holes 31, and a limiting flat key 4 is arranged in each key groove 11; the upper ends of the limit flat keys 4 extend into the positioning holes 31 and are connected together through plug welding 41. Specifically, the positioning holes 31 are divided into two groups and are oppositely arranged on two sides of the rear sleeve 3; each set of positioning holes 31 includes 3 positioning holes 31 arranged in the axial direction. In this embodiment, the positioning hole 31 is a oval structure. The length of the positioning hole 31 in the middle is greater than the length of the positioning holes 31 on both sides. Preferably, the outer wall of the rear sleeve 3 is provided with two positioning convex rings 32. The positioning convex ring 32 is disposed between two adjacent positioning holes 31.

In the description of the specification, reference to the description of "one embodiment", "preferably", "an example", "a specific example" or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model, and schematic representations of the terms in this specification do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

With the above structure and principle in mind, those skilled in the art should understand that the present invention is not limited to the above embodiments, and modifications and substitutions based on the known technology in the field are within the scope of the present invention, which should be limited by the claims.

Claims

1. The utility model provides a hydraulic cylinder piston rod welded structure, includes piston rod (1) and connecting sleeve, its characterized in that: the connecting sleeve is of a split structure and comprises a front sleeve (2) and a rear sleeve (3) which are connected; the rear sleeve (3) is provided with a plurality of positioning holes (31); the piston rod (1) is provided with a plurality of key grooves (11) which correspond to the positioning holes (31) one by one, and limiting flat keys (4) are arranged in the key grooves (11); the upper ends of the limiting flat keys (4) extend into the positioning holes (31) and are connected together through plug welding (41).

2. The hydraulic cylinder piston rod welding structure according to claim 1, characterized in that: the positioning holes (31) are divided into two groups and are oppositely arranged on two sides of the rear sleeve (3); each group of positioning holes (31) comprises 3 positioning holes (31) arranged along the axial direction.

3. The hydraulic cylinder piston rod welding structure according to claim 2, characterized in that: the positioning hole (31) is of a waist-round structure.

4. The hydraulic cylinder piston rod welding structure according to claim 2, characterized in that: the length of the positioning hole (31) positioned in the middle is larger than the length of the positioning holes (31) positioned on the two sides.

5. The hydraulic cylinder piston rod welding structure according to claim 2, characterized in that: two positioning convex rings (32) are arranged on the outer wall of the rear sleeve (3).

6. The hydraulic cylinder piston rod welding structure according to claim 5, characterized in that: the positioning convex ring (32) is arranged between two adjacent positioning holes (31).

7. The hydraulic cylinder piston rod welding structure according to claim 1, characterized in that: the front sleeve (2) and the rear sleeve (3) are connected in a welding mode.