Vertical lifting device for working arm of excavator

Abstract

The utility model discloses a vertical lifting device for a working arm of an excavator. The hoisting device comprises a winch, a pulley and a pull rope, the winch is connected to the middle section of a working arm of the excavator, and the rotating axis of the winch is arranged in the width direction of the working arm; the pulley is rotationally connected to the tail end of the working arm, and the rotating axis of the pulley is arranged in the width direction of the working arm; one end of the pull rope is wound and fixedly connected to the winding roller, and the other end of the pull rope is erected on the pulley and provided with a hook. Through the arrangement of the winch and the pull rope, during use, a rope used for binding a hanging piece is hung on the hook, and the device is similar to a device in the background technology; and then the winch is started and the pull rope is wound, so that the lifting piece is vertically lifted, the lifting height can be influenced by the length of the pull rope, and the height of the operation range is effectively increased.

Description

Technical Field

[0001] This application relates to the technical field of hoisting, and in particular to a vertical hoisting device for an excavator working arm. Background Art

[0002] As a kind of earthwork machinery widely used in modern construction machinery, excavators have the advantages of strong practicability and convenient operation. During the use of excavators, the working devices are often replaced with different attachments to achieve different operation functions. Among them, hoisting is a common function of excavators.

[0003] For example, a hoisting device for an excavator is disclosed in the utility model patent specification with the publication number of "CN206857962U". The key points of its technical solution are: limit devices allowing the hoisting rope to pass through are arranged on both side edges of the excavator bucket, and the end of the hoisting rope is bound to the suspended object. Another example is the structure with hooks arranged on the commonly used bucket and quick-change device of an excavator, which can also achieve hoisting; however, the above common hoisting structures cannot achieve the vertical hoisting of the excavator arm, and the suspended parts will move in an arc following the bucket; at the same time, the hoisting height is very low and the working range height is small. Utility Model Content

[0004] In order to increase the hoisting height of the excavator and achieve vertical hoisting at the same time, this application provides a vertical hoisting device for an excavator working arm.

[0005] This application provides a vertical hoisting device for an excavator working arm, adopting the following technical solutions:

[0006] A vertical hoisting device for an excavator working arm includes a winch, a pulley and a pulling rope. The winch is connected to the middle section of the working arm, and the rotation axis of the winch is arranged along the width direction of the working arm; the pulley is rotatably connected to the end of the working arm, and the rotation axis of the pulley is arranged along the width direction of the working arm; one end of the pulling rope is wound and fixedly connected to the winch, and the other end is erected on the pulley and is provided with a hook.

[0007] Optionally, a mounting seat is fixedly connected to the end of the working arm, and the pulley is rotatably connected to the mounting seat.

[0008] Optionally, two parallel pin shafts are arranged on the mounting seat, and mounting holes for the two pin shafts to pass through are formed on the working arm.

[0009] Optionally, a roller is rotatably connected to the mounting seat, and the rotation axis of the roller is arranged along the width direction of the working arm; a gap for the pulling rope to pass through is left between the roller and the pulley.

[0010] In summary, this application includes the following beneficial technical effects:

[0011] In this application, through the setting of a winch and a pulling rope, during use, a rope for binding a suspended load is hung on the hook, similar to the situation in the background art; then the winch is started to wind up the pulling rope, so that the suspended load is vertically lifted, and the lifting height is affected by the length of the pulling rope, effectively increasing the working range height. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is the overall structure diagram of a vertical lifting device for an excavator working arm in this application;

[0013] Figure 2 is Figure 1 the overall structure diagram of the pulley part in

[0014] Description of the reference numerals in the drawings:

[0015] 1, working arm; 2, winch; 3, pulling rope; 4, mounting seat; 5, pin shaft; 6, rotating roller; 7, pulley; 71, groove; 8, hook. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will Figure 1-2 further elaborate on this application in detail with reference to the accompanying drawings.

[0017] The embodiment of this application discloses a vertical lifting device for an excavator working arm 1; the device includes a winch 2, a pulley 7 and a pulling rope 3. The winch 2 is fixedly connected to the middle section of the working arm 1, and the rotation axis of the roller in the winch 2 is arranged along the width direction of the working arm 1; the end of the working arm 1 is fixedly connected with a mounting seat 4 through two parallel pin shafts 5, the pulley 7 is rotatably connected to the mounting seat 4, the rotation axis of the pulley 7 is arranged along the width direction of the working arm 1, and at the same time, a groove 71 matching the pulling rope 3 is provided on the circumferential surface of the pulley 7; one end of the pulling rope 3 is wound and fixedly connected to the roller of the winch 2, and the other end of the pulling rope 3 is placed on the pulley 7 and fixedly connected with a hook 8.

[0018] During use, a rope for binding a suspended load is hung on the hook 8, similar to the excavator in the background art; then the winch 2 is started to wind up the pulling rope 3, so that the suspended load is vertically lifted, and the lifting height is affected by the length of the pulling rope 3, effectively increasing the working range height.

[0019] In order to prevent the pulling rope 3 from detaching from the pulley 7, a rotating roller 6 is also rotatably connected to the mounting seat 4. The rotation axis of the rotating roller 6 is arranged along the width direction of the working arm 1. A gap for the pulling rope 3 to pass through is left between the rotating roller 6 and the pulley 7, and the pulling rope 3 is stuck in the gap to prevent detachment.

[0020] The above are all the preferred embodiments of this application. The protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape and principle of this application should be covered within the protection scope of this application.

Claims

1. A vertical lifting device for an excavator working arm, characterized in that: The invention comprises a winch (2), a pulley (7) and a pull rope (3); the winch (2) is connected to the middle section of the working arm (1), and the rotation axis of the winch (2) is arranged along the width direction of the working arm (1); the pulley (7) is rotatably connected to the end of the working arm (1), and the rotation axis of the pulley (7) is arranged along the width direction of the working arm (1); one end of the pull rope (3) is wound and fixedly connected to the winch (2), and the other end is mounted on the pulley (7) and is provided with a hook (8).

2. The vertical lifting device for an excavator working arm according to claim 1, characterized in that: A mounting seat (4) is fixedly connected to the end of the working arm (1), and the pulley (7) is rotatably connected to the mounting seat (4).

3. The vertical lifting device for the working arm of an excavator according to claim 2, characterized in that: The mounting seat (4) is provided with two parallel pin shafts (5), and the working arm (1) is provided with a mounting hole for the two pin shafts (5) to pass through.

4. The vertical lifting device for an excavator working arm according to claim 3, characterized in that: A roller (6) is rotatably connected to the mounting seat (4), and the rotation axis of the roller (6) is arranged along the width direction of the working arm (1); a gap is left between the roller (6) and the pulley (7) for the pull rope (3) to pass through.

5. The vertical lifting device for an excavator working arm according to claim 1, characterized in that: A groove (71) for mounting the pull rope (3) is provided on the circumferential surface of the pulley (7).

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