CN216761711U - Telescopic leg convenient to install - Google Patents

Abstract

A telescopic landing leg convenient to install comprises an inner cross beam, an outer cross beam, a positioning piece, a base, a rotating shaft and a chain wheel; the side wall of the outer cross beam is provided with a positioning hole; the positioning piece is fixedly arranged on the inner wall of the outer cross beam, a clamping groove is formed in the positioning piece, the opening of the clamping groove faces the telescopic opening of the outer cross beam, and the positioning hole is located in the clamping groove; the base can enter the clamping groove from the opening of the clamping groove, the base is provided with fixing holes, and after the base completely enters the clamping groove, the fixing holes correspond to the positioning holes one by one; the rotating shaft is fixedly arranged on the base; the chain wheel is rotatably arranged on the rotating shaft. The positioning piece is fixedly arranged on the inner wall of the outer beam of the telescopic supporting leg convenient to install, the chain wheel enters the outer beam along with the inner beam to be made, the base can drive the chain wheel to enter the clamping groove together, the positioning hole and the fixing hole can be conveniently aligned, the chain wheel can be conveniently and quickly fixed at a designated position, and the installation efficiency is improved.

Description

Telescopic supporting leg convenient to install

Technical Field

The utility model belongs to the technical field of engineering machinery, and particularly relates to a telescopic supporting leg convenient to mount.

Background

Vehicles, tires and rail cranes are equipped with telescoping legs. The telescopic supporting legs are used for increasing the supporting base of the crane and improving the lifting capacity. In order to compensate for the inclination and unevenness of the ground of the operation field and increase the anti-overturning stability of the crane, the telescopic supporting legs can be independently adjusted. The telescopic leg usually comprises more than two sections of beams which can be independently adjusted to be telescopic, and the telescopic adjustment is realized between two adjacent beams through a chain. One end of the chain is fixed on the outer wall of the beam positioned inside, the other end of the chain is rotatably connected with the driving device through a chain wheel, and the chain wheel is rotatably arranged on the inner wall of the beam positioned outside through a fastener. Because the clearance between interior crossbeam and the outer crossbeam is very little, when installation interior crossbeam, chain and sprocket, need be simultaneously with in the installation gets into the outer crossbeam with interior crossbeam, chain and sprocket, then fix the sprocket through the fastener. The defect that exists among the prior art is that the sprocket is difficult to be aligned with the fixed orifices on the outer beam after getting into the outer beam, needs to spend a large amount of time to adjust, and at the in-process of adjustment, presss from both sides the injury operating personnel easily moreover.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a telescopic supporting leg convenient to mount, and solves the problems in the background technology.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows: a telescopic landing leg convenient to install comprises an inner cross beam, an outer cross beam, a positioning piece, a base, a rotating shaft and a chain wheel;

the side wall of the outer cross beam is provided with a positioning hole;

the positioning piece is fixedly arranged on the inner wall of the outer cross beam, a clamping groove is formed in the positioning piece, the opening of the clamping groove faces the telescopic opening of the outer cross beam, and the positioning hole is located in the clamping groove;

the base can enter the clamping groove from the opening of the clamping groove, the base is provided with fixing holes, and after the base completely enters the clamping groove, the fixing holes correspond to the positioning holes one by one;

the rotating shaft is fixedly arranged on the base;

the chain wheel is rotatably arranged on the rotating shaft.

On the basis of the above-mentioned aspect and as a preferable aspect of the above-mentioned aspect, the fixing hole is a threaded hole.

On the basis of the above scheme and as a preferable scheme of the above scheme, the positioning hole is a counter-sunk hole.

On the basis of the above scheme and as a preferable scheme of the above scheme, the thickness of the base is larger than that of the positioning piece.

On the basis of the above scheme and as a preferable scheme of the above scheme, a bearing is arranged between the chain wheel and the rotating shaft.

On the basis of the scheme, and as a preferred scheme of the scheme, an outer snap spring is arranged on the outer side of the bearing and is clamped on the rotating shaft.

On the basis of the scheme, as a preferred scheme of the scheme, an inner snap spring is arranged on the inner side of the bearing, a snap spring groove is formed in the inner side wall of the chain wheel, and the inner snap spring is located in the snap spring groove.

On the basis of the scheme, and as a preferred scheme of the scheme, chamfers are arranged on the edge of the opening of the clamping groove and the four corners of the base.

The utility model has the following beneficial effects: the positioning piece is fixedly arranged on the inner wall of the outer beam of the telescopic supporting leg convenient to install, the chain wheel enters the outer beam along with the inner beam to be made, the base can drive the chain wheel to enter the clamping groove together, the positioning hole and the fixing hole can be conveniently aligned, the chain wheel can be conveniently and quickly fixed at a designated position, and the installation efficiency is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the outer beam and the spacer.

Fig. 3 is a partially enlarged view of a portion a in fig. 2.

FIG. 4 is a schematic structural view of the present invention with the inner and outer cross members removed.

Fig. 5 is a schematic sectional view along the direction of a-a in fig. 1.

Fig. 6 is a partially enlarged view of fig. 5 at B.

Fig. 7 is a schematic structural diagram of the positioning member.

Fig. 8 is a schematic structural diagram of the base and the rotating shaft.

The reference numbers are as follows:

1. an inner cross beam; 2. an outer beam; 21. positioning holes; 3. a positioning member; 31. a card slot; 4. a base; 41. a fixing hole; 5. a rotating shaft; 6. a sprocket; 7. a bearing; 8. an outer snap spring; 9. and an inner snap spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 8, a telescopic leg convenient to mount comprises an inner beam 1, an outer beam 2, a positioning piece 3, a base 4, a rotating shaft 5 and a chain wheel 6;

the side wall of the outer cross beam 2 is provided with a positioning hole 21;

the positioning piece 3 is fixedly arranged on the inner wall of the outer cross beam 2, a clamping groove 31 is formed in the positioning piece 3, the opening of the clamping groove 31 faces the telescopic opening of the outer cross beam 2, and the positioning hole 21 is positioned in the clamping groove 31;

the base 4 can enter the clamping groove 31 from the opening of the clamping groove 31, the base 4 is provided with fixing holes 41, and after the base 4 completely enters the clamping groove 31, the fixing holes 41 correspond to the positioning holes 21 one by one;

the rotating shaft 5 is fixedly arranged on the base 4;

the sprocket 6 is rotatably mounted on the shaft 5.

When the inner cross beam is installed and enters the outer cross beam, the chain wheels enter the outer cross beam together, in the entering process, the base can enter along the clamping groove of the positioning piece due to the fact that the positioning piece is arranged on the inner side wall of the outer cross beam, after the base completely enters the clamping groove, the positioning holes and the fixing holes can be aligned one by one, then the fastening pieces are sequentially screwed into the positioning holes and the fixing holes outside, therefore, the chain wheels can be conveniently and rapidly fixed on the inner wall of the outer cross beam, the position of the base does not need to be adjusted many times, and the installing efficiency is improved.

The fixing holes 41 are threaded holes, so that the base can be screwed and fixed conveniently by the fasteners.

The positioning holes 21 are countersunk holes, and when the countersunk bolts are used, the countersunk bolts can completely enter the side walls of the outer cross beam, so that the fasteners can be prevented from protruding out of the side walls of the outer cross beam.

The thickness of base 4 is greater than the thickness of setting element 3, can avoid sprocket and setting element contact.

And a bearing 7 is arranged between the chain wheel 6 and the rotating shaft 5, so that the friction force between the chain wheel and the rotating shaft can be reduced, and the chain wheel can rotate more easily.

The outside of bearing 7 is equipped with outer jump ring 8, 8 clamps of outer jump ring are on pivot 5, can prevent that the bearing from removing to the outside.

The inboard of bearing 7 is equipped with interior jump ring 9, be equipped with the jump ring groove on the inside wall of sprocket 6, interior jump ring 9 is arranged in the jump ring groove, can prevent that the sprocket from moving to the outside.

The edge of the opening of the clamping groove 31 and the four corners of the base 4 are provided with chamfers, and when the base enters the clamping groove, the chamfers have a guiding effect, so that the base can smoothly enter the clamping groove.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (8)

1. The utility model provides a telescopic leg convenient to installation which characterized in that: comprises an inner beam (1), an outer beam (2), a positioning piece (3), a base (4), a rotating shaft (5) and a chain wheel (6);

the side wall of the outer cross beam (2) is provided with a positioning hole (21);

the positioning piece (3) is fixedly arranged on the inner wall of the outer cross beam (2), a clamping groove (31) is formed in the positioning piece (3), the opening of the clamping groove (31) faces to the telescopic opening of the outer cross beam (2), and the positioning hole (21) is located in the clamping groove (31);

the base (4) can enter the clamping groove (31) from the opening of the clamping groove (31), the base (4) is provided with fixing holes (41), and after the base (4) completely enters the clamping groove (31), the fixing holes (41) correspond to the positioning holes (21) one by one;

the rotating shaft (5) is fixedly arranged on the base (4);

the chain wheel (6) is rotatably arranged on the rotating shaft (5).

2. A telescoping leg for ease of installation as in claim 1, wherein: the fixing hole (41) is a threaded hole.

3. A telescoping leg for ease of installation as in claim 2, wherein: the positioning hole (21) is a counter bore.

4. A telescoping leg for ease of installation as in claim 1, wherein: the thickness of the base (4) is larger than that of the positioning piece (3).

5. A telescoping leg for ease of installation as in claim 1, wherein: and a bearing (7) is arranged between the chain wheel (6) and the rotating shaft (5).

6. A telescoping leg for ease of installation as in claim 5, wherein: the outside of bearing (7) is equipped with outer jump ring (8), outer jump ring (8) clamp is on pivot (5).

7. A telescoping leg for ease of installation as in claim 5, wherein: the inner side of the bearing (7) is provided with an inner clamp spring (9), the inner side wall of the chain wheel (6) is provided with a clamp spring groove, and the inner clamp spring (9) is located in the clamp spring groove.

8. A telescoping leg for ease of installation as in claim 1, wherein: the edge of the opening of the clamping groove (31) and the four corners of the base (4) are provided with chamfers.

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