CN212740514U

CN212740514U - Telescopic boom and engineering machinery

Info

Publication number: CN212740514U
Application number: CN202021655540.0U
Authority: CN
Inventors: 李正西; 郑小明; 潘祥
Original assignee: Fujian Xiaxing Heavy Machinery Co ltd
Current assignee: Fujian Xiaxing Heavy Machinery Co ltd
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2021-03-19
Anticipated expiration: 2030-08-11

Abstract

The application relates to the technical field of engineering machinery, in particular to a telescopic arm and engineering machinery. The telescopic arm comprises a plurality of sections of jointed arms which are nested with each other and a telescopic cylinder which is arranged in the jointed arms. Under the working conditions that the knuckle arms extend out and are in a larger use radius, the clamping mechanism can improve the anti-skid performance between the knuckle arms, reduce the occurrence of uncontrolled extension or retraction of the knuckle arms caused by the loss of acting force of the telescopic cylinder, and improve the safety of the telescopic arms in inclined extension work. When the telescopic arm works in a radius mode, the clamping mechanism can be adjusted in advance, so that adjacent sections of arms are in a relatively fixed state, and the situation that the telescopic arm is not controlled due to the fact that the telescopic cylinder loses acting force is prevented. The gasket is used for adjusting the gap between the knuckle arms, improving the smoothness between the adjacent knuckle arms, and improving the mutual abrasion problem between the adjacent knuckle arms.

Description

Telescopic boom and engineering machinery

Technical Field

The application relates to the technical field of engineering machinery, in particular to a telescopic arm and engineering machinery.

Background

The telescopic boom is usually used as a working device on engineering machinery and mainly comprises a plurality of telescopic booms and telescopic cylinders which are connected in a nested manner, and the telescopic booms extend or retract along the axial direction under the action of the telescopic cylinders, so that the use radius and the reasonable use height of the engineering device are enlarged, and the like.

The extending and retracting processes of the telescopic arm are controlled by the telescopic cylinder, so that the requirement on the telescopic cylinder is high. When the knuckle arm extends out and is in an inclined working state, if the telescopic cylinder leaks or is lack of hydraulic medium, the knuckle arm retracts or extends out uncontrollably, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

In order to improve the security that flexible arm slope stretched out during operation, this application provides a flexible arm and engineering machine tool.

In a first aspect, the application provides a telescopic boom, which adopts the following technical scheme:

a telescopic arm comprises a plurality of sections of jointed arms which are mutually nested and a telescopic cylinder which is arranged in the jointed arms, wherein the telescopic cylinder drives and controls the jointed arms to relatively slide and stretch; and a clamping mechanism is arranged between the adjacent knuckle arms.

Through adopting above-mentioned technical scheme, chucking mechanism can be for increasing the friction between the adjacent festival arm or spacing fixed. Under the working conditions that the knuckle arms extend out and are in a larger use radius, the anti-skid performance between the knuckle arms is improved, the situation that the knuckle arms extend out or retract in an uncontrolled manner due to the fact that the telescopic cylinders lose acting force is reduced, and the safety of the telescopic arms in inclined extension working is improved.

When the telescopic cylinder loses the action, if the knuckle arm is inclined upwards, the knuckle arm is easy to retract uncontrollably; if the knuckle arms are in a slanted downward orientation, they tend to protrude out uncontrollably. Uncontrolled telescoping of the telescopic boom will directly result in a standstill of the intended construction work. And if the retraction or extension speed is high, the accident that engineering facilities below the telescopic arm are damaged cannot be avoided in the retraction or extension process.

Preferably, the clamping mechanism is arranged at the end part of the front end of the knuckle arm positioned at the outer side in the extending direction; the clamping mechanism is adjustably connected with the knuckle arm adjacent to the inner side of the knuckle arm where the clamping mechanism is located.

Through adopting above-mentioned technical scheme, among the adjacent knuckle arm, be located the front end tip normality of outside knuckle arm along the direction of stretching out and be located inboard knuckle arm projection and correspond, set up chucking mechanism in this position, can ensure chucking mechanism result of use.

Preferably, the clamping mechanism comprises a plurality of fastening screws movably arranged on the knuckle arms; when the fastening screw rotates inwards, the inner end face of the fastening screw abuts against the outer wall of the knuckle arm adjacent to the inner side of the knuckle arm where the fastening screw is located.

Through adopting above-mentioned technical scheme, adopt fastening screw as chucking mechanism, the personnel of being convenient for adjust the fastening, if fastening screw goes wrong moreover, but quick replacement, the replaceability is high. When the telescopic boom works in a radius mode, the fastening screw can be screwed inwards in advance, so that adjacent sections of booms are in a relatively fixed state, and the situation that the telescopic boom is not controlled due to the fact that the telescopic cylinder loses acting force is prevented.

Preferably, the number of the fastening screws on the upper side wall of the knuckle arm is greater than the number of the fastening screws on the other side walls of the knuckle arm.

By adopting the technical scheme, the direct working accessory of the telescopic arm is positioned below the foremost end of the telescopic arm; in the working process, the front end of the knuckle arm positioned on the inner side in the adjacent knuckle arms is stressed downwards, and the rear end of the knuckle arm positioned on the inner side abuts against the inner wall positioned above the knuckle arm positioned on the outer side. In order to ensure that the axial directions of the adjacent knuckle arms are the same, a large force needs to be applied to the upper surface of the rear end part of the inner knuckle arm to ensure the stress balance with other side surfaces and also help the adjacent knuckle arms to be locked with each other.

Preferably, the telescopic cylinder is installed between the innermost knuckle arm and the outermost knuckle arm.

Through adopting above-mentioned technical scheme, the telescoping cylinder is installed and is located between the knuckle arm of the most inboard and the knuckle arm of the most outside, and the telescoping cylinder of being convenient for drives the knuckle arm fast and slides and stretches out and draw back.

Preferably, the knuckle arm comprises a moving arm and a fixed arm, the moving arm is nested in the fixed arm, and the moving arm is controlled by a telescopic cylinder to stretch and retract relative to the fixed arm in a sliding manner; the telescopic cylinder comprises a cylinder body and a piston rod, and the piston rod is relatively slidably telescopic in the cylinder body; the cylinder body is installed in the shifting arm, the one end that the piston rod kept away from the cylinder body articulates the one end inboard that the fixed arm kept away from the shifting arm.

By adopting the technical scheme, the cylinder body of the telescopic cylinder is arranged in the movable arm positioned on the inner side, when the telescopic arm is positioned at the working position inclined upwards, under the condition that hydraulic medium leaks or is lack in the telescopic cylinder, the cylinder body moves towards the hinging direction of the piston rod and the fixed arm along the axial direction by self weight, the effective space of the inner cavity of the cylinder body is compressed, so that the effective space is matched with a small amount of hydraulic medium only stored in the cylinder body, and the uncontrolled retraction of the telescopic arm is slowed down.

Preferably, a gasket is arranged between the adjacent knuckle arms.

By adopting the technical scheme, the gasket is used for adjusting the gap between the knuckle arms and improving the smoothness between the adjacent knuckle arms. And the gasket can improve the mutual abrasion problem between the adjacent knuckle arms.

Preferably, the spacer is attached to an outer wall of a rear end portion of the link arm located inside in the projecting direction.

Through adopting above-mentioned technical scheme, flexible arm stretches out, retrieve the in-process, and the outer wall normality sliding contact that is located inboard festival arm along the rear end tip of extending direction is in the inner wall of adjacent festival arm, uses the gasket to include this position that receives the wearing and tearing degree the biggest.

Preferably, the gasket is made of a nylon material.

Through adopting above-mentioned technical scheme, the gasket surface of nylon material is lubricated relatively, in flexible arm normal use in-process, can reduce the frictional force between the adjacent festival arm, improves the flexible efficiency of festival arm slip.

In a second aspect, the present application further provides an engineering machine, which adopts the following technical scheme:

an engineering machine comprises the telescopic arm.

By adopting the technical scheme, the telescopic arm with the clamping mechanism is used, and the safety of the engineering machinery in the using process is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

1. under the working conditions that the knuckle arms extend out and are in a larger use radius, the clamping mechanism can improve the anti-skid performance between the knuckle arms, reduce the occurrence of uncontrolled extension or retraction of the knuckle arms caused by the loss of acting force of the telescopic cylinder, and improve the safety of the telescopic arms in inclined extension work.

2. The clamping mechanism is a fastening screw, so that the clamping mechanism is convenient for personnel to adjust and fasten, and if the fastening screw has a problem, the fastening screw can be quickly replaced, and the replaceability is high; when the telescopic boom works in a radius mode, the fastening screw can be screwed inwards in advance, so that adjacent sections of booms are in a relatively fixed state, and the situation that the telescopic boom is not controlled due to the fact that the telescopic cylinder loses acting force is prevented.

3. The gasket is used for adjusting the clearance between the knuckle arms and improving the smoothness between the adjacent knuckle arms. And the gasket can improve the mutual abrasion problem between the adjacent knuckle arms.

Drawings

FIG. 1 is a schematic structural view of a telescopic arm in an embodiment of the present application;

FIG. 2 is a schematic structural view illustrating a state where the telescopic arm is extended to the maximum length in the embodiment of the present application;

FIG. 3 is an enlarged view of part A of FIG. 2, which mainly shows the structure of the fastening screw and the washer;

FIG. 4 is a schematic view of the external structure of the telescopic arm in the embodiment of the present application;

FIG. 5 is a schematic view of the embodiment of the present application showing the telescopic arm retracted to the shortest position;

fig. 6 is a schematic structural diagram of a construction machine according to an embodiment of the present application.

Description of reference numerals: 1. a knuckle arm; 11. a fixed arm; 12. a moving arm; 2. a telescopic cylinder; 21. a cylinder body; 22. a piston rod; 3. fastening screws; 4. and (7) a gasket.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a telescopic arm, which comprises a plurality of sections of jointed arms 1 which are mutually nested and a telescopic cylinder 2 which is arranged in the jointed arms 1, wherein the telescopic cylinder 2 drives and controls the jointed arms 1 to relatively slide and stretch; a clamping mechanism is arranged between the adjacent knuckle arms 1. The clamping mechanism can be used for increasing the friction between adjacent knuckle arms 1 or limiting fixation. Under the working condition that the knuckle arms 1 extend out and are in a larger use radius, the anti-skid performance between the knuckle arms 1 is improved, the situation that the knuckle arms 1 extend out or retract in an uncontrolled manner due to the fact that the telescopic cylinders 2 lose acting force is reduced, and the safety of the telescopic arms in inclined extension working is improved.

Referring to fig. 1, a telescopic arm includes a fixed arm 11, a moving arm 12, and a telescopic cylinder 2. The telescopic cylinder 2 is installed between the fixed arm 11 and the moving arm 12. The movable arm 12 is nested in the fixed arm 11, and the movable arm 12 is driven and controlled by the telescopic cylinder 2 and slides and stretches relative to the fixed arm 11.

Referring to fig. 2 and 3, a plurality of fastening screws 3 are movably mounted on the end portion of the front end of the fixed arm 11 along the extending direction of the moving arm 12, and when the fastening screws 3 rotate inward, the inner end surfaces of the fastening screws 3 abut against the outer wall of the moving arm 12.

Referring to fig. 4, the number of fastening screws 3 provided on the side wall of the fixing arm 11 is greater than the number of fastening screws 3 provided on the other side walls. Generally, 6 fastening screws 3 are mounted on the upper side wall of the fixing

arm

11, and 3 fastening bolts are respectively arranged on two side walls adjacent to the upper side wall. The different quantity of fastening screws 3 in the different lateral walls of fixed arm 11 is according to fixed arm 11 and the regional atress condition that corresponds of removal arm 12 projection in the telescopic boom use.

Referring to fig. 5, the telescopic cylinder 2 comprises a cylinder body 21 and a piston rod 22, and the piston rod 22 is relatively slidably telescopic in the cylinder body 21; the cylinder body 21 is arranged on the moving arm 12, and one end of the piston rod 22, far away from the cylinder body 21, is hinged to the inner side of one end of the fixed arm 11, far away from the moving arm 12. The cylinder body 21 of the telescopic cylinder 2 is arranged in the movable arm 12 positioned on the inner side, when the telescopic arm is positioned at an inclined upward working position, and under the condition that hydraulic medium leaks or is lack in the telescopic cylinder 2, the cylinder body 21 moves in the hinging direction of the piston rod 22 and the fixed arm 11 along the axial direction under the dead weight, the effective space of the inner cavity of the cylinder body 21 is compressed, the effective space is matched with a small amount of hydraulic medium only stored in the cylinder body 21, and the uncontrolled retraction of the telescopic arm is slowed down.

The outer side wall of the end part of the moving arm 12 close to one end of the hinged part of the piston rod 22 and the fixed arm 11 is provided with a gasket 4. Gasket 4 adopts the nylon material to make, and 4 surperficial relative lubrications of gasket of nylon material can reduce the frictional force between the adjacent festival arm 1 in flexible arm normal use, improve the flexible efficiency of festival arm 1 slip. The spacer 4 can be used to adjust the gap between the moving arm 12 and the fixed arm 11, to improve the smoothness between the two, and to improve the mutual abrasion between the two.

Referring to fig. 6, an embodiment of the present application further discloses a construction machine including the telescopic arm. The telescopic arm with the clamping mechanism is used, and the safety of the engineering machinery in the using process is improved.

The implementation principle of a telescopic boom and engineering machinery in the embodiment of the application is as follows:

referring to fig. 2 and 3, when the knuckle arm 1 extends out to enable the telescopic arm to work at a larger use radius, the fastening screw 3 (clamping mechanism) can be used for improving the anti-skid performance between the knuckle arms 1, reducing the occurrence of uncontrolled extension or retraction of the knuckle arm 1 caused by the loss of acting force of the telescopic cylinder 2, and improving the safety of the telescopic arm during inclined extension work. The fastening screw 3 is adopted as a clamping mechanism, so that the adjustment and fastening of personnel are facilitated, and if the fastening screw 3 has a problem, the quick replacement can be realized, and the replaceability is high; when the telescopic boom works in a radius mode, the fastening screws 3 can be screwed inwards in advance, so that the adjacent knuckle booms 1 are in a relatively fixed state, and the situation that the telescopic boom is not controlled due to the fact that the telescopic cylinder 2 loses acting force is prevented.

The spacer 4 is used for adjusting the gap between the link arms 1 and improving the smoothness between the adjacent link arms 1. And the spacer 4 improves the problem of mutual wear between adjacent knuckle arms 1.

When the telescopic boom is in the working position inclined upwards, under the condition that the telescopic cylinder 2 has leakage or lack of hydraulic medium, the cylinder body 21 moves towards the hinging direction of the rod of the piston rod 22 and the fixed arm 11 along the axial direction under the dead weight, the effective space in the inner cavity of the cylinder body 21 is compressed, the effective space is matched with a small amount of hydraulic medium only stored in the cylinder body 21, and the uncontrolled retraction of the telescopic boom is slowed down.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A telescopic boom, characterized in that: the telescopic arm comprises a plurality of sections of jointed arms (1) which are mutually nested and a telescopic cylinder (2) which is arranged in the jointed arms (1), wherein the telescopic cylinder (2) drives and controls the jointed arms (1) to relatively slide and stretch; and a clamping mechanism is arranged between every two adjacent knuckle arms (1).

2. The telescopic arm according to claim 1, characterized in that: the clamping mechanism is arranged at the end part of the front end of the knuckle arm (1) positioned at the outer side in the extending direction; the clamping mechanism is adjustably connected to the knuckle arm (1) adjacent to the inner side of the knuckle arm (1) where the clamping mechanism is located.

3. The telescopic arm according to claim 1, characterized in that: the clamping mechanism comprises a plurality of fastening screws (3) movably arranged on the knuckle arm (1); when the fastening screw (3) rotates inwards, the inner end face of the fastening screw (3) is abutted against the outer wall of the knuckle arm (1) adjacent to the inner side of the knuckle arm (1) where the fastening screw (3) is located.

4. The telescopic arm according to claim 3, wherein: the number of the fastening screws (3) on the upper side wall of the knuckle arm (1) is larger than the number of the fastening screws (3) on the other side walls of the knuckle arm (1).

5. The telescopic arm according to claim 1, characterized in that: the telescopic cylinder (2) is arranged between the knuckle arm (1) located at the innermost side and the knuckle arm (1) located at the outermost side.

6. The telescopic arm according to claim 5, wherein: the knuckle arm (1) comprises a moving arm (12) and a fixed arm (11), the moving arm (12) is nested in the fixed arm (11), and the moving arm (12) is controlled by a telescopic cylinder (2) to stretch and retract in a sliding mode relative to the fixed arm (11); the telescopic cylinder (2) comprises a cylinder body (21) and a piston rod (22), and the piston rod (22) is relatively slidably telescopic in the cylinder body (21); the cylinder body (21) is arranged on the moving arm (12), and one end, far away from the cylinder body (21), of the piston rod (22) is hinged to the inner side of one end, far away from the moving arm (12), of the fixed arm (11).

7. The telescopic arm according to claim 1, characterized in that: and a gasket (4) is arranged between the adjacent knuckle arms (1).

8. The telescopic arm according to claim 7, wherein: the gasket (4) is mounted on the outer wall of the rear end part of the knuckle arm (1) located on the inner side in the extending direction.

9. The telescopic arm according to claim 7, wherein: the gasket (4) is made of a nylon material.

10. A construction machine characterized in that: comprising a telescopic arm according to any of claims 1-9.