阅读说明：本技术 锁定机构、起重臂和起重机 (Locking mechanism, crane boom and crane ) 是由 韩奎 游浩杰 喻露 于 2020-07-09 设计创作，主要内容包括：本发明提供一种锁定机构、起重臂和起重机,涉及工程机械技术领域。该锁定机构包括锁定杆和动力组件；锁定杆的两端之间的位置处铰接在起重臂的基本臂上,锁定杆的其中一端位于起重臂的副臂的一侧,锁定杆的另一端与动力组件的输出端之间通过滑动副连接；滑动副和动力组件均安装在基本臂上,动力组件用于驱动滑动副沿倾斜于起重臂的基本臂的方向滑动,以带动锁定杆的与滑动副连接的一端靠近或者远离起重臂的基本臂。本发明缓解了现有技术中汽车起重机的起重臂上的锁定机构中的动力组件与工作杆之间为分离式结构,动力组件与工作杆之间的传动过程并不稳定,导致锁定机构不能稳定的锁定副臂和解锁副臂的技术问题。(The invention provides a locking mechanism, a crane boom and a crane, and relates to the technical field of engineering machinery. The locking mechanism comprises a locking rod and a power assembly; the position between the two ends of the locking rod is hinged on the basic arm of the crane boom, one end of the locking rod is positioned on one side of the auxiliary arm of the crane boom, and the other end of the locking rod is connected with the output end of the power assembly through a sliding pair; the sliding pair and the power assembly are both arranged on the basic arm, and the power assembly is used for driving the sliding pair to slide along the direction oblique to the basic arm of the crane arm so as to drive one end, connected with the sliding pair, of the locking rod to be close to or far away from the basic arm of the crane arm. The invention solves the technical problem that the locking mechanism can not stably lock and unlock the auxiliary arm because the transmission process between the power assembly and the working rod is unstable due to the fact that the power assembly and the working rod are of a separated structure in the locking mechanism on the crane arm of the automobile crane in the prior art.)

1. A locking mechanism, characterized in that it comprises a locking lever (1) and a power assembly (2);

the position between two ends of the locking rod (1) is hinged to a basic arm (3) of the crane boom, one end of the locking rod (1) is located on one side of an auxiliary arm (4) of the crane boom, and the other end of the locking rod (1) is connected with the output end of the power assembly (2) through a sliding pair (5);

the sliding pair (5) and the power assembly (2) are both mounted on a basic arm (3) of the crane boom, and the power assembly (2) is used for driving the sliding pair (5) to slide along a direction oblique to the basic arm (3) of the crane boom so as to drive one end, connected with the sliding pair (5), of the locking rod (1) to be close to or far away from the basic arm (3) of the crane boom.

2. The locking mechanism according to claim 1, characterized in that a bend (10) is arranged between the two ends of the locking lever (1), and the bend (10) is used for inclining the locking lever (1) from the bend (10) to the end connected with the sliding pair (5) towards the direction close to the basic arm (3) of the crane arm.

3. The locking mechanism according to claim 2, characterized in that the sliding pair (5) comprises a guide rail (50) and a slider (51), the guide rail (50) being mounted on the locking lever (1) on the side close to the basic arm (3) of the jib, the slider (51) being slidably connected in the guide rail (50) and on the basic arm (3) of the jib.

4. The locking mechanism according to claim 1, characterized in that the power assembly (2) comprises a power rod (20);

the position between two ends of the power rod (20) is hinged to a basic arm (3) of a crane boom, one end of the power rod (20) is connected with the sliding pair (5), and the other end of the power rod (20) is connected with a gravity block (21);

the gravity block (21) is used for driving the power rod (20) to rotate on a basic arm (3) of a crane arm, so that one end, connected with the sliding pair (5), of the power rod (20) drives the sliding pair (5) to work.

5. The locking mechanism according to claim 4, characterized in that the power assembly (2) further comprises a first support bar (22), the first support bar (22) being mounted vertically on the side of the power bar (20) close to the base arm (3) of the crane boom, and the first support bar (22) being located on the end of the power bar (20) remote from the weight block (21);

the end of the first support rod (22) far away from the power rod (20) is connected to the basic arm (3) of the crane arm in a sliding way along the rotating path of the power rod (20) at the position where the first support rod (22) is connected.

6. The locking mechanism according to claim 5, characterized in that the power assembly (2) further comprises a second support bar (23), the second support bar (23) being vertically mounted on the side of the power bar (20) close to the basic arm (3) of the jib, and the second support bar (23) being located between the position of the power bar (20) hinged to the basic arm (3) of the jib and the end to which the weight block (21) is connected;

one end of the second support rod (23) far away from the power rod (20) is connected to a basic arm (3) of the crane arm in a sliding way along a rotating path of the power rod (20) at the position where the second support rod (23) is connected.

7. The locking mechanism according to claim 4, characterized in that a connecting rod (24) is connected between the power rod (20) and the sliding pair (5);

one end of the connecting rod (24) is rotatably connected with one end of the power rod (20) far away from the gravity block (21), and the other end of the connecting rod (24) is rotatably connected with the sliding pair (5).

8. The locking mechanism according to any one of claims 1 to 7, characterized in that the locking mechanism further comprises a spring (7), the spring (7) being mounted between the locking lever (1) and the basic arm (3) of the jib, and the spring (7) being located between the position of the locking lever (1) articulated with the basic arm (3) of the jib and the end remote from the sliding pair (5);

when one end of the locking rod (1) far away from the sliding pair (5) is connected with or separated from the auxiliary arm (4) of the crane arm, the elastic piece (7) is in a stretching state.

9. A crane boom, characterized in that the crane boom comprises a primary arm, a secondary arm and a locking mechanism according to any of claims 1-8;

the secondary arm is slidably connected with the primary arm, and the locking mechanism is installed between the primary arm and the secondary arm.

10. A crane, characterized in that the crane comprises a jib as claimed in claim 9.

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a locking mechanism, a crane boom and a crane.

Background

When the automobile crane is suddenly stopped and braked in the travelling process, due to the inertia effect, the auxiliary arm in the crane arm of the automobile crane can jump forwards relative to the basic arm, and certain potential safety hazard is brought to the braking of the crane.

In order to prevent the auxiliary arm of the crane boom from bouncing forward relative to the main arm during the braking process of the truck crane, a locking mechanism is installed between the main arm and the auxiliary arm of the prior truck crane, the locking mechanism comprises a working rod and a power assembly, the middle part of the working rod is hinged on the main arm, one end of the working rod is in a hook shape and is positioned on one side of the auxiliary arm, and the other end of the working rod is positioned on one side of the main arm. The power assembly may be inserted between the base arm and an end of the working lever remote from the hooked end, or withdrawn from between the base arm and an end of the working lever remote from the hooked end, so that the working lever may be driven to rotate on the base arm so that the hooked end of the working lever is hooked with or separated from the sub-arm. When the hooked end of the operating lever is hooked with the sub-arm, the sub-arm and the base arm are relatively fixed to each other, and the sub-arm is prevented from being sprung forward relative to the base arm.

However, in the locking mechanism adopted on the boom of the existing automobile crane, the power assembly and the working rod are in a separated structure, so that the transmission process between the power assembly and the working rod in the locking mechanism is unstable, and the disconnection phenomenon is easy to occur, so that the locking mechanism cannot stably lock and unlock the auxiliary arm.

Disclosure of Invention

The invention aims to provide a locking mechanism, a crane boom and a crane, which aim to solve the technical problems that a power assembly and a working rod in the locking mechanism adopted on the crane boom of the automobile crane in the prior art are of a separated structure, so that the transmission process between the power assembly and the working rod in the locking mechanism is unstable, and the locking mechanism is easy to disengage, so that the locking mechanism cannot stably lock and unlock an auxiliary arm.

The locking mechanism provided by the invention comprises a locking rod and a power assembly;

the position between the two ends of the locking rod is hinged on the basic arm of the crane boom, one end of the locking rod is positioned on one side of the auxiliary arm of the crane boom, and the other end of the locking rod is connected with the output end of the power assembly through a sliding pair;

the sliding pair and the power assembly are both arranged on the basic arm of the crane boom, and the power assembly is used for driving the sliding pair to slide along the direction oblique to the basic arm of the crane boom so as to drive one end, connected with the sliding pair, of the locking rod to be close to or far away from the basic arm of the crane boom.

Furthermore, a bent part is arranged between two ends of the locking rod, and the bent part is used for enabling the locking rod to incline towards the direction close to the basic arm of the crane boom from the bent part to one end connected with the sliding pair.

Further, the sliding pair comprises a guide rail and a sliding block, the guide rail is arranged on one side of the locking rod close to the basic arm of the crane boom, and the sliding block is connected in the guide rail in a sliding mode and is connected to the basic arm of the crane boom in a sliding mode.

Further, the power assembly comprises a power rod;

the position between the two ends of the power rod is hinged on a basic arm of the crane boom, one end of the power rod is connected with the sliding pair, and the other end of the power rod is connected with the gravity block;

the gravity block is used for driving the power rod to rotate on the basic arm of the crane boom so as to drive one end of the power rod, which is connected with the sliding pair, to drive the sliding pair to work.

Furthermore, the power assembly also comprises a first support rod, the first support rod is vertically arranged on one side of the power rod, which is close to the basic arm of the crane boom, and the first support rod is positioned on one end of the power rod, which is far away from the gravity block;

the end of the first support rod remote from the power rod is slidably connected to the basic arm of the jib along a rotational path of the power rod at the location where the first support rod is connected.

Furthermore, the power assembly also comprises a second support rod, the second support rod is vertically arranged on one side of the power rod close to the basic arm of the crane boom, and the second support rod is positioned between the position of the power rod hinged with the basic arm of the crane boom and one end connected with the gravity block;

the end of the second support rod remote from the power rod is slidably connected to the basic arm of the jib along a rotational path of the power rod at the location where the second support rod is connected.

Further, a connecting rod is connected between the power rod and the sliding pair;

one end of the connecting rod is rotatably connected with one end of the power rod, which is far away from the gravity block, and the other end of the connecting rod is rotatably connected with the sliding pair.

Furthermore, the locking mechanism also comprises an elastic part, the elastic part is arranged between the locking rod and the basic arm of the crane arm, and the elastic part is positioned between the position of the locking rod hinged with the basic arm of the crane arm and one end far away from the sliding pair;

when one end of the locking rod, which is far away from the sliding pair, is connected with or separated from the auxiliary arm of the crane arm, the elastic piece is in a stretching state.

The crane boom provided by the invention comprises a basic boom, an auxiliary boom and the locking mechanism in any one of the technical schemes;

the secondary arm is slidably connected to the primary arm, and the locking mechanism is mounted between the primary arm and the secondary arm.

The crane provided by the invention comprises the crane arm.

The locking mechanism, the crane arm and the crane provided by the invention can produce the following beneficial effects:

the locking mechanism provided by the invention comprises a locking rod and a power assembly, wherein the position between two ends of the locking rod is hinged on a basic arm of a crane boom, one end of the locking rod is positioned at one side of an auxiliary arm of the crane boom, and the other end of the locking rod is connected with the output end of the power assembly through a sliding pair. When the crane boom is in an inoperative state, in order to prevent the auxiliary arm in the crane boom on the crane boom from bouncing forward relative to the base arm due to inertia when the crane brakes, the base arm and the auxiliary arm can be locked together by the locking rod in the locking mechanism. Specifically, the power assembly can be used for pulling the sliding pair to enable the sliding pair to slide along a direction oblique to the basic arm of the crane boom, so that one end, connected with the sliding pair, of the locking rod is driven to be far away from the basic arm of the crane boom. Meanwhile, the locking rod rotates on the basic arm by taking the hinged part of the locking rod on the basic arm as a rotation center, and one end of the locking rod, which is far away from the sliding pair, is connected with the auxiliary arm of the crane arm, so that the auxiliary arm and the basic arm can be connected together. When the crane is braked, the fly jib has a tendency to leap forward due to inertial force, but at the moment, the end of the locking lever far away from the sliding pair plays a role in intercepting, and the fly jib is prevented from leaping forward relative to the basic jib. When the crane boom is in a working state, in order to prevent the locking rod from influencing the working process of the crane boom, the power assembly can be utilized to pull the sliding pair in a reverse direction, so that the sliding pair drives the end part of the locking rod connected with the sliding pair to move towards a direction far away from the basic arm, at the moment, the locking rod can rotate on the basic arm in a reverse direction, one end of the locking rod far away from the sliding pair can be separated from the auxiliary arm of the crane boom, the locking rod unlocks between the basic arm and the auxiliary arm, the auxiliary arm can move relative to the basic arm, and the crane boom can work normally.

Compared with the prior art, the power assembly and the locking rod in the locking mechanism are connected through the sliding pair, and the power assembly can drive the locking rod to rotate on the basic arm through the sliding pair, so that one end of the locking rod, far away from the sliding pair, can be connected with or separated from the auxiliary arm of the crane arm. The power assembly and the locking rod in the locking mechanism are connected through the sliding pair and the transmission process is realized through the sliding pair, the power assembly and the locking rod in the locking mechanism are not easy to disengage in the transmission process, and the locking mechanism can play a role stably and plays roles in locking and unlocking the auxiliary arm.

The crane boom comprises a basic arm, an auxiliary arm and the locking mechanism, wherein the auxiliary arm is connected with the basic arm in a sliding mode, and the locking mechanism is installed between the basic arm and the auxiliary arm. The crane arm provided by the invention comprises the locking mechanism, so that the crane arm provided by the invention and the locking mechanism can achieve the same beneficial effects.

The crane provided by the invention comprises the crane boom, so that the crane provided by the invention and the crane boom can achieve the same beneficial effects.

Drawings

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

FIG. 1 is a schematic structural view of a locking mechanism and a lift arm provided in accordance with an embodiment of the present invention;

FIG. 2 is a front view of the locking mechanism and lift arm of FIG. 1;

fig. 3 is a schematic structural view of the locking mechanism in fig. 1.

Icon: 1-a locking lever; 10-bending part; 2-a power assembly; 20-a power rod; 21-gravity block; 22-a first support bar; 23-a second support bar; 24-a connecting rod; 3-a base arm; 4-the fly jib; 5-a sliding pair; 50-a guide rail; 51-a slider; 6, mounting a plate; 60-a first arc-shaped slot; 61-a second arc-shaped groove; 62-a chute; 7-elastic member.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood 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.