Hydraulic grab bucket and excavator

Abstract

The utility model discloses a hydraulic grab bucket and an excavator. The hydraulic grab bucket comprises a fixed body and a hydraulic cylinder, the first grab bucket is rotationally connected with the fixed body; the second grab bucket is rotationally connected with the fixed body, and the first grab bucket and the second grab bucket are used for clamping materials in a matched mode; the two ends of the linkage mechanism are rotationally connected with the first grab bucket and the second grab bucket correspondingly, and the linkage mechanism is used for driving the first grab bucket and the second grab bucket to be closed or opened synchronously; the first driving mechanism is arranged on the fixing body, and the first driving mechanism is connected with the linkage mechanism and used for driving the linkage mechanism to rotate. According to the hydraulic grab bucket and the excavator, the first driving mechanism can drive the linkage mechanism to move, and the linkage mechanism can drive the first grab bucket and the second grab bucket to be synchronously closed or opened, so that the problems of material scattering and oil leakage of an equipment oil cylinder can be avoided, and the working efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to excavating equipment technical field more specifically, relate to a kind of hydraulic grab. BACKGROUND

[0002] Hydraulic grab is a kind of using hydraulic system driven grab equipment, widely used in port, wharf, mine, construction site etc., for loading and unloading and handling various bulk materials, such as coal, ore, scrap steel, scrap iron, sandstone etc.

[0003] The existing hydraulic grab, two grab lobes are controlled to two sets of independent control system, two grab lobes are operated separately, in other words, the movement of the existing hydraulic grab is controlled respectively, which directly leads to the problem that material spillage and equipment cylinder oil leakage are prone to occur in operation process, thereby affecting operation efficiency.

[0004] In summary, how to avoid the above-mentioned problem of material spillage is a problem that needs to be solved by the technical personnel in the field at present. SUMMARY

[0005] Therefore, the utility model aims at providing a kind of hydraulic grab, first drive mechanism is used to drive linkage mechanism to rotate, linkage mechanism can drive first grab and second grab to close synchronously or open synchronously, to realize the synchronous driving of two grab lobes, thereby avoiding material spillage.

[0006] Another object of the utility model is to provide a kind of excavator comprising the above-mentioned hydraulic grab.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0008] A kind of hydraulic grab, comprising:

[0009] Fixed body;

[0010] First grab, rotationally connected with the fixed body;

[0011] Second grab, rotationally connected with the fixed body, the first grab and the second grab are used to cooperate and hold material;

[0012] Linkage mechanism, both ends are respectively corresponding with the first grab, the second grab rotationally connected, the linkage mechanism is used to drive the first grab and the second grab to close synchronously or open synchronously;

[0013] First drive mechanism, set in the fixed body, the first drive mechanism is connected with the linkage mechanism and is used to drive the linkage mechanism to rotate.

[0014] Preferably, a first transition piece is further included, the first transition piece is rotationally connected with the fixed body through a left pin shaft, the first transition piece is provided with a first through hole, a second through hole and a third through hole, the left pin shaft is arranged in the first through hole, the first grab bucket is arranged in the second through hole, an upper pin shaft for rotationally connecting the first transition piece with the linkage mechanism is arranged in the third through hole, and the third through hole is arranged above the side of the first through hole.

[0015] Preferably, a second transition piece is further included, the second transition piece is rotationally connected with the fixed body through a right pin shaft, the second transition piece is provided with a fourth through hole, a fifth through hole and a sixth through hole, the right pin shaft is arranged in the fourth through hole, the second grab bucket is arranged in the fifth through hole, a lower pin shaft for rotationally connecting the second transition piece with the linkage mechanism is arranged in the sixth through hole, and the sixth through hole is arranged below the side of the fourth through hole.

[0016] Preferably, the first driving mechanism is an oil cylinder, a base body of the oil cylinder is arranged in the right pin shaft, and an output end of the oil cylinder is rotationally connected with the upper pin shaft.

[0017] Preferably, a detachable slewing mechanism and a carrier are sequentially arranged on the fixed body, and the slewing mechanism is used to drive the fixed body to rotate relative to the carrier.

[0018] Preferably, a limiting part is arranged on each of the first transition piece and the second transition piece, and the limiting part is used to abut against the slewing mechanism to limit the rotation range of the first grab bucket and the second grab bucket.

[0019] Preferably, the first grab bucket is clamped in the second through hole through a clamping jaw, and the second grab bucket is clamped in the fifth through hole through a clamping jaw.

[0020] Preferably, the distance between the first through hole and the second through hole is equal to the distance between the fourth through hole and the fifth through hole, and the distance between the first through hole and the third through hole is equal to the distance between the fourth through hole and the sixth through hole.

[0021] Preferably, the carrier is a hollow structure, a second driving mechanism is arranged in the carrier, and the second driving mechanism is used to drive the slewing mechanism to rotate.

[0022] A excavator includes a hydraulic grab bucket, and the hydraulic grab bucket is any one of the hydraulic grab buckets.

[0023] The utility model provides a kind of hydraulic grab, the fixed body of the hydraulic grab is provided with rotatable first grab and second grab, first grab and second grab are connected by linkage mechanism, first driving structure is connected with linkage mechanism, first driving mechanism can drive linkage mechanism to move, to drive first grab and second grab synchronous closing or synchronous opening, can complete the grabbing or placement of material in practical application, avoid the problem of material spillage and equipment oil cylinder oil leakage, improve work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be simply introduced below, and obviously, the drawings in the following description are only embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative labor.

[0025] Figure 1 It is the front view of the hydraulic grab provided by the utility model;

[0026] Figure 2 It is the plan view of the hydraulic grab provided by the utility model;

[0027] Figure 3 It is Figure 2 Sectional view at A-A.

[0028] Reference signs:

[0029] 1-fixed body;2-first grab;3-second grab;4-linkage mechanism;5-first transition piece;6-left pin shaft;7-upper pin shaft;8-second transition piece;9-right pin shaft;10-lower pin shaft;11-oil cylinder;12-rotary mechanism;13-carrier;14-hydraulic motor. DETAILED DESCRIPTION

[0030] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0031] The core of the utility model is to provide a kind of hydraulic grab, the hydraulic grab can realize the synchronous closing or synchronous opening of first grab and second grab, guarantee work efficiency.

[0032] Another core of the utility model is to provide a kind of excavator including the above-mentioned hydraulic grab.

[0033] It should be noted that the directions or positional relationships indicated by "upper", "lower", "front", "rear" and the like are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0034] The hydraulic grab provided by the present application comprises a fixed body 1, a first grab 2, a second grab 3, a linkage mechanism 4 and a first driving mechanism.

[0035] The first grab 2 is rotationally connected with the fixed body 1.

[0036] The second grab 3 is rotationally connected with the fixed body 1, and the first grab 2 and the second grab 3 are used to cooperate to hold the material.

[0037] The two ends of the linkage mechanism 4 are respectively rotationally connected with the first grab 2 and the second grab 3, and the linkage mechanism 4 is used to drive the first grab 2 and the second grab 3 to synchronously close or synchronously open.

[0038] The first driving mechanism is arranged on the fixed body 1, and the first driving mechanism is connected with the linkage mechanism 4 and is used to drive the linkage mechanism 4 to rotate.

[0039] Specifically, please refer to the accompanying drawings Figure 1 The fixed body 1 is a hollow structure, the lower part of the outer periphery thereof is rotationally connected with the first grab 2 and the second grab 3, the connection parts of the first grab 2 and the second grab 3 with the fixed body 1 are in the same horizontal plane, the first grab 2 and the second grab 3 are respectively arranged on the two sides of the fixed body 1, the first grab 2 and the second grab 3 move towards each other, i.e. synchronously close, the first grab 2 and the second grab 3 move away from each other, i.e. synchronously open, the first grab 2 and the second grab 3 are connected through the linkage mechanism 4, the linkage mechanism 4 is connected with the first driving mechanism, the first driving mechanism can drive the linkage mechanism 4 to move, the linkage mechanism 4 can drive the first grab 2 and the second grab 3 to synchronously move towards each other or synchronously move away from each other, i.e. the synchronous closing or synchronous opening of the first grab 2 and the second grab 3 can be realized, so as to avoid the problems of material spilling and equipment oil cylinder oil leakage during operation, and ensure the operation efficiency.

[0040] On the basis of the above-mentioned embodiment, a first transition piece 5 is further included, the first transition piece 5 is rotationally connected with the fixed body 1 through a left pin shaft 6, the first transition piece 5 is provided with a first through hole, a second through hole and a third through hole, the left pin shaft 6 is arranged in the first through hole, the first grab 2 is arranged in the second through hole, an upper pin shaft 7 for realizing the rotational connection between the first transition piece 5 and the linkage mechanism 4 is arranged in the third through hole, and the third through hole is arranged above the side of the first through hole.

[0041] Specifically, please refer to the accompanying drawingsFigure 3 The first transition piece 5 is a plate structure, three through holes are arranged on the first transition piece 5, the first transition piece 5 is rotationally connected with the fixed body 1 through the left pin shaft 6, the first transition piece 5 is fixedly connected with the first grab bucket 2, the linkage mechanism 4 is rotationally connected with the first transition piece 5, and the movement mechanism can be referred to the attached Figure 3 The linkage mechanism 4 can drive the first transition piece 5 to rotate counterclockwise around the left pin shaft 6, so that the first grab bucket 2 moves towards the second grab bucket 3, and the grabbing action is realized. The linkage mechanism 4 drives the first transition piece 5 to rotate clockwise around the left pin shaft 6, so that the first grab bucket 2 moves away from the second grab bucket 3, and the material is placed.

[0042] On the basis of the above embodiment, a second transition piece 8 is further included, the second transition piece 8 is rotationally connected with the fixed body 1 through a right pin shaft 9, the second transition piece 8 is provided with a fourth through hole, a fifth through hole and a sixth through hole, the right pin shaft 9 is arranged in the fourth through hole, the second grab bucket 3 is arranged in the fifth through hole, a lower pin shaft 10 for rotationally connecting the second transition piece 8 with the linkage mechanism 4 is arranged in the sixth through hole, and the sixth through hole is arranged below the fourth through hole.

[0043] Specifically, please refer to the attached Figure 3 The second transition piece 8 is also a plate structure, and three through holes are arranged on the second transition piece 8. However, the structure of the second transition piece 8 is different from that of the first transition piece 5. The second transition piece 8 can rotate around the right pin shaft 9. The linkage mechanism 4 can drive the second transition piece 8 to rotate clockwise, so that the second grab bucket 3 can move towards the first grab bucket 2. When the linkage mechanism 4 drives the second transition piece 8 to rotate counterclockwise, the second grab bucket 3 can move away from the first grab bucket 2. According to the movement principle of the first grab bucket 2, when the linkage mechanism 4 drives the first transition piece 5 to rotate counterclockwise, the linkage mechanism 4 can simultaneously drive the second transition piece 8 to rotate clockwise. When the linkage mechanism 4 drives the first transition piece 5 to rotate clockwise, the linkage mechanism 4 can simultaneously drive the second transition piece 8 to rotate counterclockwise, so as to realize the synchronous closing or opening of the first grab bucket 2 and the second grab bucket 3.

[0044] On the basis of the above embodiment, the first driving mechanism is an oil cylinder 11, the base body of the oil cylinder 11 is arranged on the right pin shaft 9, and the output end of the oil cylinder 11 is rotationally connected with the upper pin shaft 7.

[0045] Specifically, the base body of the oil cylinder 11 is rotatably arranged on the right pin shaft 9, and the output end of the oil cylinder 11 is rotatably connected with the upper pin shaft 7. When the oil cylinder 11 is extended, the linkage mechanism 4 can push the first transition piece 5 to rotate counterclockwise, and at the same time, the linkage mechanism 4 can pull the second transition piece 8 to rotate clockwise, so as to realize the synchronous closing of the first grab bucket 2 and the second grab bucket 3, complete the material grabbing, and when the oil cylinder 11 is retracted, the linkage mechanism 4 can pull the first transition piece 5 to rotate clockwise, and at the same time, the linkage mechanism 4 can push the second transition piece 8 to rotate counterclockwise, so as to realize the synchronous opening of the first grab bucket 2 and the second grab bucket 3, complete the material placing. For the oil cylinder 11, when the upper pin shaft 7 rotates counterclockwise, the vertical height gradually increases, and correspondingly, the oil cylinder 11 can rotate clockwise at a small amplitude. When the oil cylinder 11 is retracted, the upper pin shaft 7 rotates clockwise, and the vertical height gradually decreases, and correspondingly, the oil cylinder 11 can rotate counterclockwise at a small amplitude.

[0046] On the basis of the above embodiment, the fixed body 1 is sequentially provided with a detachable rotating mechanism 12 and a carrier 13. The rotating mechanism 12 is used to drive the fixed body 1 to rotate relative to the carrier 13.

[0047] Specifically, the upper side of the rotating mechanism 12 is detachably connected with the carrier 13 through bolts, and the lower side of the rotating mechanism 12 is detachably connected with the fixed body 1 through bolts. Generally, the carrier 13 is fixedly connected with the excavator, and the rotating mechanism 12 can realize the rotation of the fixed body 1 relative to the carrier 13 during the rotation process, so as to adjust the grabbing or placing angle of the material in actual engineering.

[0048] On the basis of the above embodiment, the first transition piece 5 and the second transition piece 8 are both provided with a limiting portion. The limiting portion is used to abut against the rotating mechanism 12 to limit the rotation amplitude of the first grab bucket 2 and the second grab bucket 3.

[0049] Specifically, the upper end of the first transition piece 5 and the second transition piece 8 are both provided with a limiting portion. When the oil cylinder 11 is retracted to a specified position, the limiting portion abuts against the rotating mechanism 12, so as to avoid the first grab bucket 2 and the second grab bucket 3 from continuously moving towards the rotating mechanism 12, thereby playing a limiting role. At this time, the distance between the first grab bucket 2 and the second grab bucket 3 is the largest, that is, the maximum size of the material that can be safely grabbed. If the size of the material is too large, the grab bucket or the material needs to be divided.

[0050] On the basis of the above embodiment, the first grab bucket 2 is clamped in the second through hole by a jaw, and the second grab bucket 3 is clamped in the fifth through hole by a jaw.

[0051] Specifically, for the connection mode of the first grab bucket 2 and the first transition piece 5, a clamping connection or a fixed connection is generally selected, if the fixed connection is selected, the deflection amplitudes of the first grab bucket 2 and the second grab bucket 3 relative to the fixed body 1 should be the same, so that the first grab bucket 2 and the second grab bucket 3 can be completely attached when being synchronously closed, if the clamping connection is selected, the first grab bucket 2 can be slightly rotated in the second through hole due to the setting of the clamping jaw, thereby playing a buffering role.

[0052] Optionally, a rotating mechanism can be additionally arranged to realize the independent rotation of the first grab bucket 2 and the second grab bucket 3, thereby improving the flexibility of the grab bucket.

[0053] On the basis of the above embodiment, the distance between the first through hole and the second through hole is equal to the distance between the fourth through hole and the fifth through hole, and the distance between the first through hole and the third through hole is equal to the distance between the fourth through hole and the sixth through hole.

[0054] Specifically, the distance between the first through hole and the second through hole is equal to the distance between the fourth through hole and the fifth through hole, so as to ensure that the rotation amplitudes of the first grab bucket 2 and the second grab bucket 3 are the same, correspondingly, the distance between the first through hole and the third through hole is equal to the distance between the fourth through hole and the sixth through hole, so as to ensure that the rotation amplitudes of the first transition piece 5 and the second transition piece 8 are the same when the linkage mechanism 4 moves, and the amplitudes of the synchronous closing and the synchronous opening of the first grab bucket 2 and the second grab bucket 3 are the same under the limitation of the distance between the through holes.

[0055] In some embodiments, the carrier 13 is a hollow structure, and a second driving mechanism is arranged in the carrier 13, the second driving mechanism being used to drive the slewing mechanism 12 to rotate.

[0056] Specifically, please refer to the accompanying drawings Figure 2 The second driving mechanism is generally a hydraulic motor 14, two hydraulic motors 14 are installed in the carrier 13, and the fixed body 1 is driven to rotate by the two hydraulic motors 14, compared with the single hydraulic motor, the two hydraulic motors 14 can have greater torque, can bear greater oil pressure and flow, and can ensure the stable operation of the rotary hydraulic grab bucket as much as possible.

[0057] In addition to the above hydraulic grab bucket, the utility model also provides a shovel comprising the hydraulic grab bucket disclosed in the above embodiment, and the structures of other parts of the shovel can refer to the prior art, and will not be described herein.

[0058] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

[0059] The hydraulic grab and excavator provided by the utility model are described in detail. The principle and implementation mode of the utility model are described by applying specific examples. The description of the above examples is only used for helping to understand the method and core idea of the utility model. It should be pointed out that the ordinary skilled in the art can make some improvements and modifications to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A hydraulic grab bucket, characterized in that: include: Fixed body (1); A first grab bucket (2) is rotatably connected to the fixed body (1); A second grab bucket (3) is rotatably connected to the fixed body (1), and the first grab bucket (2) and the second grab bucket (3) are used to cooperate in clamping materials; A linkage mechanism (4), the two ends of which are rotatably connected to the first grab bucket (2) and the second grab bucket (3), respectively, and the linkage mechanism (4) is used to drive the first grab bucket (2) and the second grab bucket (3) to close or open synchronously; A first driving mechanism is provided on the fixed body (1), and the first driving mechanism is connected to the linkage mechanism (4) and is used to drive the linkage mechanism (4) to rotate.

2. The hydraulic grab bucket according to claim 1, characterized in that: The invention also includes a first transition piece (5), the first transition piece (5) is rotatably connected to the fixed body (1) through a left pin (6), the first transition piece (5) is provided with a first through hole, a second through hole and a third through hole, the left pin (6) is provided in the first through hole, the first grab (2) is provided in the second through hole, the third through hole is provided with an upper pin (7) for realizing the rotatable connection between the first transition piece (5) and the linkage mechanism (4), and the third through hole is provided on the side and above the first through hole.

3. The hydraulic grab bucket according to claim 2, characterized in that: The invention also includes a second transition piece (8), which is rotatably connected to the fixed body (1) through a right pin shaft (9), and the second transition piece (8) is provided with a fourth through hole, a fifth through hole and a sixth through hole, the right pin shaft (9) is provided in the fourth through hole, the second grab bucket (3) is provided in the fifth through hole, and a lower pin shaft (10) for realizing the rotatable connection between the second transition piece (8) and the linkage mechanism (4) is provided in the sixth through hole, and the sixth through hole is provided on the side and below the fourth through hole.

4. The hydraulic grab bucket according to claim 3, characterized in that: The first driving mechanism is an oil cylinder (11), the base of the oil cylinder (11) is arranged on the right pin shaft (9), and the output end of the oil cylinder (11) is rotatably connected to the upper pin shaft (7).

5. The hydraulic grab bucket according to claim 4, characterized in that: A detachable rotating mechanism (12) and a carrier (13) are sequentially provided on the fixed body (1), and the rotating mechanism (12) is used to drive the fixed body (1) to rotate relative to the carrier (13).

6. The hydraulic grab bucket according to claim 5, characterized in that: The first transition piece (5) and the second transition piece (8) are both provided with a limiting portion, and the limiting portion is used to abut against the slewing mechanism (12) to limit the rotation range of the first grab bucket (2) and the second grab bucket (3).

7. The hydraulic grab bucket according to claim 6, characterized in that: The first grab bucket (2) is clamped to the second through hole via a clamping claw, and the second grab bucket (3) is clamped to the fifth through hole via a clamping claw.

8. The hydraulic grab bucket according to claim 7, characterized in that: The distance between the first through hole and the second through hole is equal to the distance between the fourth through hole and the fifth through hole, and the distance between the first through hole and the third through hole is equal to the distance between the fourth through hole and the sixth through hole.

9. The hydraulic grab bucket according to any one of claims 5 to 8, characterized in that: The carrier (13) is a hollow structure, and a second driving mechanism is provided inside the carrier, and the second driving mechanism is used to drive the rotary mechanism (12) to rotate.

10. An excavator comprising a hydraulic grab bucket, characterized in that: The hydraulic grab bucket is the hydraulic grab bucket according to any one of claims 1 to 9.

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