Rapid self-locking and unlocking lifting appliance for movable arm and bucket rod of excavator

Abstract

The utility model relates to a quick self-locking and unlocking lifting appliance for a movable arm and a bucket rod of an excavator. The quick self-locking and unlocking lifting appliance comprises a lifting shaft and a lifting rod, the lifting shaft and the lifting rod are detachable, the sliding groove is formed in one end of the lifting shaft, the lifting rod can move along the sliding groove and can be fixed in the sliding groove, and lifting can be achieved for lifted objects of different specifications. A rectangular groove is formed in the other end of the hanger shaft; a limiting mechanism is fixed in the rectangular groove, the limiting mechanism protrudes out of the rectangular groove in a normal state to form a first limiting end and a second limiting end, and in the process of penetrating through a hoisted object, the limiting ends firstly retract into the rectangular groove and then pop up to complete self-locking of the hoisted object; when hoisting is completed, the hoisting shaft turns over, the position of the hoisting rod faces downwards, at the moment, the limiting end of the limiting mechanism is in a contraction state, automatic unlocking of the hoisting tool and a hoisted object is achieved, the self-locking and unlocking functions of the hoisting tool can be rapidly achieved only through the gravity effect, the structure is simple, and cost is low.

Description

Technical Field

[0001] The utility model relates to the field of mechanical industrial manufacturing, in particular to a fast self-locking and unlocking sling for an excavator boom and a dipper rod. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] In the manufacturing process of large-scale equipment such as excavators, it is often necessary to hoist and transport various structural parts of large-scale equipment such as excavators, such as the boom and dipper of the excavator. In order to improve the hoisting efficiency, a hoist with automatic locking and unlocking functions is usually used to achieve hoisting and transportation. Patent No. CN201817189U discloses a balanced self-locking hoist for the boom of an excavator. During the hoisting process, the hoist is first combined with the excavator boom through a mandrel, and the hoisting operation is performed using the lifting holes located at different positions of the hoist. However, the mandrel still needs to be manually installed and removed during the entire hoisting process, and the automatic locking and unlocking function between the boom and the hoist cannot be realized. In addition, different lifting holes are selected to ensure the balance and stability of the boom during the hoisting process. The operation is cumbersome and the structure is complex. Utility Model Content

[0004] The purpose of the utility model is to provide a quick self-locking and unlocking hanger for an excavator boom and a bucket rod, comprising a hanger shaft and a hanger rod;

[0005] A slide groove is provided at one end of the suspension shaft, and the suspension rod can move along the slide groove and can be fixed in the slide groove;

[0006] A rectangular groove is also provided at the other end of the suspension shaft; a limiting mechanism is fixed in the rectangular groove, and the limiting mechanism includes an upper limiting plate and a lower limiting plate, the upper limiting plate is connected to the suspension shaft through the first rotating shaft, and the lower bottom surface of the upper limiting plate abuts against the first limiting pin, so that one end of the upper limiting plate protrudes from the bucket shaft to form a first limiting end; a second limiting pin is also provided below the side surface of the upper limiting plate to limit the upper limiting plate during the flipping process;

[0007] The lower limit plate is connected to the hanging shaft through the second rotating shaft, and the upper bottom surface of the upper limit plate abuts against the third limit pin, so that one end of the lower limit plate protrudes from the bucket shaft to form a second limit end; a fourth limit pin is provided on the upper side of the lower limit plate to realize the limiting of the lower limit plate during the flipping process.

[0008] As a further technical solution, the suspension shaft is a cylindrical structure.

[0009] As a further technical solution, one end of the hanging shaft having the rectangular groove is chamfered.

[0010] As a further technical solution, the front end of the boom is tilted.

[0011] As a further technical solution, a circular hanging hole is also provided at the front end of the hanging rod.

[0012] As a further technical solution, the suspension rod is fixed to the slide groove of the suspension shaft by means of locking bolts.

[0013] As a further technical solution, the suspension rod and the suspension shaft are detachable.

[0014] As a further technical solution, the suspension rod can be matched with suspension shafts of different sizes according to the different specifications of the suspension points of the suspended objects;

[0015] or,

[0016] The lifting shaft is matched with lifting rods of different sizes to complete the lifting operation.

[0017] As a further technical solution, the upper limit plate and the lower limit plate are of asymmetric eccentric design.

[0018] As a further technical solution, the upper limit plate and the lower limit plate rotate in opposite directions.

[0019] Beneficial effects of one or more of the above technical solutions:

[0020] (1) The limit plate adopts an asymmetric eccentric design. Under normal conditions, the limit plate cooperates with the limit pin to protrude from the rectangular groove to form a limit end. During the lifting process, due to the action of the limit pin, the limit plate first automatically retracts into the rectangular groove and then pops out of the rectangular groove to achieve self-locking. After the lifting is completed, due to the reversal of the lifting device, under the action of the limit pin, the limit end of the limit plate can automatically retract into the rectangular groove to complete automatic unlocking.

[0021] (2) The boom and the suspension shaft can be disassembled and fixed, and can be freely combined in multiple specifications to cover a variety of working conditions and objects to be suspended. In addition, the boom can be moved along the slideway on the suspension shaft to a suitable position and fixed, which can prevent the object to be suspended from rotating during the lifting process due to the displacement of the center of gravity. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present application, are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute a limitation on the present application.

[0023] Figure 1 It is a structural schematic diagram of the movable arm of the hoisted object of the utility model.

[0024] Figure 2 It is a structural schematic diagram of the bucket arm of the hoisted object of the utility model.

[0025] Figure 3 It is a schematic diagram of the overall structure of the utility model.

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the utility model.

[0027] Figure 5 It is a schematic diagram of the self-locking function of the utility model.

[0028] Figure 6 It is a schematic diagram of the unlocking function of the utility model.

[0029] In the figure, 1 is a suspension rod; 2 is a suspension shaft; 3 is a locking bolt; 4 is an upper limit plate; 5 is a lower limit plate; 6 is a first rotation axis; 7 is a second rotation axis; 8 is a first limit pin; 9 is a second limit pin; 10 is a third limit pin; 11 is a fourth limit pin; 12 is a suspension hole; 13 is a suspended object DETAILED DESCRIPTION

[0030] The following is combined with Figure 1-6 , describing the specific implementation of this embodiment.

[0031] Combination Figure 1 When the object to be hoisted is the boom of an excavator, the hoist shaft is inserted into the connecting hole in the middle of the boom for connecting the boom hydraulic cylinder ( Figure 1 box position).

[0032] Combination Figure 2 When the object to be hoisted is a boom, the hoisting shaft is inserted into the connecting hole at one end of the boom for connecting the boom hydraulic cylinder ( Figure 2 box position).

[0033] The present application embodiment provides a fast self-locking and unlocking lifting device for an excavator boom and a bucket rod, referring to Figure 3 A fast self-locking and unlocking lifting device for the boom and arm of an excavator, comprising a lifting rod 1 and a lifting shaft 2. The lifting shaft 2 is a cylindrical structure, and a slide groove is provided at one end of the lifting shaft 2. One end of the lifting rod 1 can move on the slide groove. The lifting rod 1 and the lifting shaft 2 can be fixed by a locking bolt 3 at a suitable position according to the specifications of the suspended object 13 to prevent the suspended object 13 from deflecting due to the center of gravity shift during the lifting process. The front end of the lifting rod 1 is tilted to facilitate the suspension shaft 2 to pass through the suspended object 13 during the lifting process, and a circular lifting hole 12 is also provided at the front end of the lifting rod 1 to facilitate the penetration of the crane hook. The lifting rod 1 and the lifting shaft 2 are detachable. For suspended objects 13 of different specifications, different sizes of suspension shafts 2 and lifting rods 1 can be selected for use in combination to complete the lifting.

[0034] Reference Figure 4The other end of the hanging shaft 2 is chamfered to facilitate the hanging shaft 2 to penetrate the suspended object 13. In addition, a rectangular groove is provided at the chamfered end of the hanging shaft 2; the upper limit plate 4 and the lower limit plate 5 in the rectangular groove are respectively connected to the hanging shaft 2 through the first rotating shaft 6 and the second rotating shaft 7. The upper limit plate 4 and the lower limit plate 5 are both asymmetrically eccentrically designed, so that the weight of the limit plate at the front and rear ends of the pin is different, so as to achieve the purpose of rotation around the rotating axis, and the upper limit plate 4 and the lower limit plate 5 have opposite rotation directions around the rotating axis.

[0035] Furthermore, the rectangular groove is also provided with a first limit pin 8, a second limit pin 9, a third limit pin 10 and a fourth limit pin 11. Under normal conditions, the bottom surface of the upper limit plate 4 abuts against the first limit pin 8, the top surface of the lower limit plate 5 abuts against the third limit pin 10, and the second limit pin and the fourth limit pin are respectively located below the side surface of the upper limit plate and above the side surface of the lower limit plate. Among them, the first limit pin 8 and the second limit pin 9 are used to limit the position of the upper limit plate 4. Specifically, due to the asymmetric eccentric design of the limit plate, under the action of gravity, the upper limit plate 4 has a tendency to rotate clockwise around the first pin 6. The position of the upper limit plate 4 is limited by the first limit pin 8 located below the upper limit plate 4, so that one end of the upper limit plate 4 protrudes from the rectangular groove to form a first limit end. Based on the same principle, the lower limit plate 5 has a tendency to rotate counterclockwise around the second pin 7, and the position of the lower limit plate is limited by the third limit pin 10 located above the lower limit plate 5, so that one end of the lower limit plate 5 protrudes from the rectangular groove to form a second limit end. The first and second limit ends are used to lock the suspended object.

[0036] Combination Figure 5 When using the sling to lift the object to be lifted, the lifting shaft 2 is controlled to pass through the suspended object 13 along the direction of the rectangular groove opened on the lifting shaft. In the process of passing through the suspended object 13, since the suspended object 13 and the first limit end and the second limit end of the sling are in contact, the upper limit plate 4 and the lower limit plate 5 are flipped. During the flipping process, the flipping distances of the upper limit plate 4 and the lower limit plate 5 are respectively limited by the second limit pin 9 and the fourth limit pin 11, so that the first limit end and the second limit end are contracted into the rectangular groove. When the rectangular groove part of the lifting shaft 8 passes through the suspended object 13, the first limit end and the second limit end automatically pop out under the action of the limit plate's own gravity to lock the suspended object 13.

[0037] Combination Figure 6After the lifting is completed, the object 13 to be lifted is placed on the load-bearing platform, and the hook of the crane is detached from the lifting hole 12 of the suspension rod 1. Since the lifting shaft 2 of the sling is cylindrical in design, and the lifting shaft 2 passes through the object 13 to be lifted, when the object 13 to be lifted is placed stably, the sling rotates around the object 13 under the action of its own weight, so that the suspension rod 1 rotates to the lower part. At this time, the upper limit plate 4 and the lower limit plate 5 are flipped around the first pin 6 and the second pin 7 again under the action of the gravity of the asymmetric structure. At this time, under the action of the second limit pin 9 and the fourth limit pin 11, the first limit end and the second limit end of the upper limit plate 4 and the lower limit plate 5 are retracted into the rectangular groove, and the sling is automatically unlocked.

[0038] Working principle:

[0039] (1) According to the specifications of the suspended object 13, select the suspension rod 1 and suspension shaft 2 of appropriate sizes, insert the suspension rod 1 into the slide groove of the suspension shaft 2, and move it to the appropriate position, and then fix the two together by the locking bolt 3.

[0040] (2) The lifting hole 12 of the lifting rod 1 is inserted into the crane hook. The upper limit plate 4 and the lower limit plate 5 are flipped around the first rotation axis 6 and the second rotation axis 7 under the action of gravity of the asymmetric structure. Under the action of the first limit pin 8 and the third limit pin 10, one end of the upper limit plate 4 protrudes from the rectangular groove to form a first limit end, and one end of the lower limit plate 5 protrudes from the rectangular groove to form a second limit end.

[0041] (3) Move the crane horizontally, and insert the lifting shaft 2 horizontally into the suspended object 13. Under the external force of the suspended object 13, the upper limit plate 4 and the lower limit plate 5 are flipped, and the first limit end and the second limit end are retracted into the rectangular groove through the second limit pin 9 and the fourth limit pin 11, until the rectangular groove of the bucket shaft 2 completely enters the suspended object 13, and the first limit end and the second limit end automatically pop out of the rectangular groove for self-locking;

[0042] (4) After the lifting is completed, the crane hook is separated from the sling, and the sling flips under its own weight. At this time, the boom 1 rotates to the lower part. The upper limit plate 4 and the lower limit plate 5 flip around the first rotation axis 6 and the second rotation axis 7 again under the action of the gravity of the asymmetric structure. Under the action of the second limit pin 9 and the fourth limit pin 11, the first limit end and the second limit end are retracted into the rectangular groove, so that the sling is unlocked and the sling is moved out.

[0043] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A fast self-locking and unlocking sling for excavator boom and dipper arm, characterized in that: include: Suspension shafts and booms; A slide groove is provided at one end of the suspension shaft, and the suspension rod can move along the slide groove and can be fixed in the slide groove; A rectangular groove is also provided at the other end of the suspension shaft; a limiting mechanism is fixed in the rectangular groove, and the limiting mechanism includes an upper limiting plate and a lower limiting plate, the upper limiting plate is connected to the suspension shaft through the first rotating shaft, and the lower bottom surface of the upper limiting plate abuts against the first limiting pin, so that one end of the upper limiting plate protrudes from the bucket shaft to form a first limiting end; a second limiting pin is also provided below the side surface of the upper limiting plate to limit the upper limiting plate during the flipping process; The lower limit plate is connected to the hanging shaft through the second rotating shaft, and the upper bottom surface of the upper limit plate abuts against the third limit pin, so that one end of the lower limit plate protrudes from the bucket shaft to form a second limit end; a fourth limit pin is provided on the upper side of the lower limit plate to realize the limiting of the lower limit plate during the flipping process.

2. A quick self-locking and unlocking sling for an excavator boom and a dipper arm as claimed in claim 1, characterized in that: The suspension shaft is a cylindrical structure.

3. A quick self-locking and unlocking sling for an excavator boom and a dipper arm as claimed in claim 1, characterized in that: One end of the hanging shaft with the rectangular groove is chamfered.

4. A quick self-locking and unlocking sling for an excavator boom and a dipper arm as claimed in claim 1, characterized in that: The front end of the suspension rod is inclined.

5. A quick self-locking and unlocking sling for an excavator boom and a dipper arm as claimed in claim 1, characterized in that: A circular hanging hole is also provided at the front end of the hanging rod.

6. A quick self-locking and unlocking sling for an excavator boom and a dipper arm as claimed in claim 1, characterized in that: The suspension rod is fixed on the slide groove of the suspension shaft through a locking bolt.

7. A quick self-locking and unlocking sling for an excavator boom and a dipper arm as claimed in claim 1, characterized in that: The suspension rod and the suspension shaft are detachable.

8. A quick self-locking and unlocking sling for an excavator boom and a dipper arm as claimed in claim 1, characterized in that: According to the different specifications of the lifting points of the suspended objects, the suspension rod can be matched with suspension shafts of different sizes; or, The lifting shaft is matched with lifting rods of different sizes to complete the lifting operation.

9. A quick self-locking and unlocking sling for an excavator boom and a dipper arm as claimed in claim 1, characterized in that: The upper limit plate and the lower limit plate are designed to be asymmetrical and eccentric.

10. A quick self-locking and unlocking sling for an excavator boom and a dipper arm as claimed in claim 1, characterized in that: The upper limit plate and the lower limit plate rotate in opposite directions.

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