Novel quick-change grabbing structure, excavator and engineering machinery

Abstract

The utility model discloses a novel quick-change grabbing structure, excavator and engineering machinery, the novel quick-change grabbing structure is used for fixing a first shaft and a second shaft of an accessory, the novel grabbing structure comprises a shell structure, a first fixing claw suitable for containing the first shaft is arranged on the shell structure, an extending oil cylinder is further arranged in the shell structure, and a second fixing claw suitable for containing the second shaft is arranged in the extending oil cylinder. The extending end of the extending oil cylinder is connected with the push rod, a limiting block is arranged at the end, close to the push rod, in the shell structure, the limiting block is rotatably arranged in the shell structure through a pin shaft, and when the limiting block is in an initial state, the limiting block is suitable for partially blocking the opening of the first fixing claw so as to limit the first shaft from sliding out of the first fixing claw. The first fixing claw used for containing the first shaft of the accessory is opened through rotation of the limiting block, then after the first shaft is installed in the first fixing claw, the inner stretching oil cylinder stretches out, then the second shaft of the accessory can be fixed, the whole operation process is simple, the assembling difficulty is lowered, and the assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a novel quick-change grasping structure. In addition, it also relates to an excavator and construction machinery. Background Technique

[0002] The double-lock connector (also known as a quick-change joint) is one of the important accessories of the working device of an excavator. It can be used for the quick connection and separation of various auxiliary devices such as ordinary buckets, tilt buckets, rippers, breaker hammers, vibrating rammers, and hydraulic shears, meeting the operation requirements of the excavator in multi-functional and multi-task working conditions and enhancing the added value of the main machine.

[0003] The structural forms of double-lock connectors are diverse, mainly divided into mechanical and hydraulic types. Among them, when replacing auxiliary devices with mechanical double-lock connectors, the installation or removal of components such as safety pins still needs to be manually completed, resulting in low efficiency; hydraulic double-lock connectors rely on the pressure provided by the hydraulic system to drive the meshing system to move to complete the replacement of auxiliary devices. In case of accidental situations such as hydraulic system failure or misoperation, there is a risk of the auxiliary device falling.

[0004] In addition, the current double-lock connector includes the following grasping steps: the extension cylinder inside it extends to open the limit block; then the first shaft of the attachment is grasped into the fixed claw, and the second shaft of the attachment should not be placed in the advancing direction of the cylinder; the cylinder retracts and the safety hook is lowered; the second shaft of the attachment is placed in the advancing direction of the cylinder; the cylinder extends to tightly grasp the second shaft of the attachment, and thus the entire grasping step is completed. It can be seen that the grasping steps of the currently used double-lock connector are relatively complex.

[0005] In view of this, it is necessary to design a novel quick-change grasping structure to simplify the grasping steps for attachments and ensure stability after grasping. Summary of the Utility Model

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0007] For this reason, the utility model provides a novel quick-change grasping structure, which can improve the assembly efficiency of attachments and reduce the assembly difficulty at the same time.

[0008] A novel quick-change grasping structure according to the first aspect of the present utility model is used for fixing a first shaft and a second shaft of an attachment, and includes a housing structure. A first fixing claw adapted to accommodate the first shaft is provided on the housing structure. An extending oil cylinder is further provided in the housing structure. The extending end of the extending oil cylinder is connected to a push rod to drive the push rod to move linearly. A limiting block is provided at one end of the housing structure close to the push rod. The limiting block is rotatably arranged in the housing structure via a pin shaft. When the limiting block is in an initial state, the limiting block is adapted to partially block an opening of the first fixing claw to limit the first shaft from sliding out of the first fixing claw.

[0009] Preferably, a second fixing claw is provided at the other end of the push rod. After the first shaft is accommodated in the first fixing claw, the second fixing claw extends out via the extending end of the extending oil cylinder to accommodate and grip the second shaft.

[0010] More preferably, the attachment is arranged in the extending direction of the extending oil cylinder.

[0011] Preferably, the limiting block is an L-shaped structure. The pin shaft is arranged at the bending part of the L-shaped limiting block. One end of the push rod is adapted to drive it to press against a bending part of the limiting block when the extending oil cylinder retracts, so that another bending part of the limiting block rotates until the opening of the first fixing claw is completely opened.

[0012] More preferably, a torsion spring is further provided on the pin shaft. The torsion spring is adapted to self-reset and drive the limiting block to rotate around the pin shaft. When the torsion spring is in an initial state, it is adapted to drive the limiting block to partially block the opening of the first fixing claw.

[0013] Preferably, a limiting block stop pin is further provided within the rotation stroke range of the limiting block. The limiting block stop pin is adapted to limit the limiting block from continuously rotating in a set direction.

[0014] The second aspect of the present utility model provides an excavator that adopts the novel quick-change grasping structure described in the first aspect of the present utility model.

[0015] The third aspect of the present utility model provides a construction machinery that adopts the novel quick-change grasping structure described in the first aspect of the present utility model.

[0016] The beneficial effects of the present utility model are as follows: the extending oil cylinder drives the push rod to move linearly, so that the push rod can abut against the limiting block, causing the limiting block to rotate and open the first fixed claw for accommodating the first shaft of the attachment. Then, after the first shaft is inserted into the first fixed claw, the extending oil cylinder extends to complete the fixation of the second shaft of the attachment. The entire operation process is simple. Compared with the current complex assembly, the assembly of the attachment only requires three steps to complete, greatly reducing the assembly difficulty and improving the assembly efficiency.

[0017] Other features and advantages of the present utility model will be described in the subsequent description, and in part, will become apparent from the description or be understood by implementing the present utility model. The objectives and other advantages of the present utility model are achieved and obtained by the structures specifically pointed out in the description, claims, and drawings.

[0018] To make the above objectives, features, and advantages of the present utility model more obvious and understandable, the following specifically gives preferred embodiments and, in conjunction with the accompanying drawings, details are described as follows. Description of the Drawings

[0019] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0020] Figure 1 Structural diagram when the extending oil cylinder of the novel quick-change grasping structure of the present utility model extends;

[0021] Figure 2 Structural diagram when the extending oil cylinder of the novel quick-change grasping structure of the present utility model retracts.

[0022] Explanation of the reference numerals:

[0023] 1. Housing structure; 11. First fixed claw; 2. First shaft; 3. Second shaft; 4. Extending oil cylinder; 5. Push rod; 51. Second fixed claw; 6. Limiting block; 7. Pin shaft; 8. Torsion spring. Detailed Embodiment

[0024] Now, the present utility model will be further described in detail in conjunction with the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model. In the description of the present utility model, it should be understood that unless otherwise specified, the meaning of "a plurality" is two or more.

[0025] See Figures 1 to 2, a drill rod assembly with wear-resistant bottom in the specific embodiment of the present utility model, for fixing the first shaft 2 and the second shaft 3 of the attachment. The novel quick-change grasping structure includes a housing structure 1. A first fixing claw 11 adapted to accommodate the first shaft 2 is provided on the housing structure 1. An extending oil cylinder 4 is further provided in the housing structure 1. The extending end of the extending oil cylinder 4 is connected to a push rod 5 to drive the push rod 5 to move linearly. A limiting block 6 is provided at one end of the housing structure 1 close to the push rod 5. The limiting block 6 is rotatably arranged in the housing structure 1 via a pin shaft 7. When the limiting block 6 is in the initial state, the limiting block 6 is adapted to partially block the opening of the first fixing claw 11 to limit the first shaft 2 from sliding out of the first fixing claw 11. After the first shaft 2 is fixed, it is necessary to fix the second shaft 3 of the attachment. The second shaft 3 of the attachment is arranged in the extending direction of the extending oil cylinder 4. That is, when the extending oil cylinder 4 extends, it drives the push rod 5 to extend synchronously. A second fixing claw 51 is provided at the other end of the push rod 5, and then drives the second fixing claw 51 to extend synchronously, so that the second fixing claw 51 can grasp the second shaft 3, and thus complete the fixed installation of the first shaft 2 and the second shaft 3 of the attachment.

[0026] Specifically, the limiting block 6 is an L-shaped structure, and the pin shaft 7 is arranged at the bending part of the L-shaped limiting block 6. When the extending oil cylinder 4 retracts, it drives the push rod 5 to retract synchronously until the push rod 5 abuts against a bending part of the limiting block 6. Then, as the push rod 5 continues to retract, it drives a bending part of the limiting block 6 to rotate, and at the same time, the other bending part of the limiting block 6 rotates synchronously until the opening of the fixing claw is completely opened, so that the first shaft 2 of the attachment can smoothly enter the first fixing claw 11.

[0027] In addition, a torsion spring 8 is also provided on the pin shaft 7 disposed at the bent portion of the limit block 6. The torsion spring 8 can drive the limit block 6 to self-return to its initial state after the limit block 6 rotates. Therefore, the limit block 6 is in a state where it can partially block the first fixed claw 11 in its initial state. In this state, due to the limitation of the limit block 6, the first shaft 2 cannot smoothly enter the first fixed claw 11. As the push rod 5 applies a force to the limit block 6 to cause the limit block 6 to rotate until the first fixed claw 11 is completely opened, at this time, the limit block 6 no longer blocks the opening of the first fixed claw 11. When the first shaft 2 is placed into the first fixed claw 11, the push rod 5 no longer applies a force to the limit block 6, and the limit block 6 rotates and resets under the action of the torsion spring 8 until the limit block 6 partially blocks the opening of the first fixed claw 11 again to prevent the first shaft 2 from sliding out of the first fixed claw 11. In addition, in order to prevent the gap between the limit block 6 and the first fixed claw 11 from being too large after the limit block 6 resets and facilitating the sliding out of the first shaft 2, a stop pin for the limit block 6 is also provided within the rotation stroke range of the limit block 6. The rotation range of the limit block 6 can be limited by the stop pin for the limit block 6 to prevent the limit block 6 from rotating to an angle where it cannot effectively block the first shaft 2 under the action of the torsion spring 8. Thus, through the above settings, not only the installation steps of the attachment are saved, but also the stability of the attachment after installation is effectively ensured.

[0028] An excavator according to a specific embodiment of the present invention adopts the novel quick-change grasping structure described in any of the above embodiments, and thus also has the above advantages.

[0029] A construction machine according to a specific embodiment of the present invention adopts the novel quick-change grasping structure described in any of the above embodiments, and thus also has the above advantages.

[0030] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0031] The above is based on the ideal embodiments of the present invention as an inspiration. Through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined by the scope of the claims.

Claims

1. A novel quick-change grasping structure for fixing a first shaft (2) and a second shaft (3) of an attachment, characterized in that, It includes a housing structure (1), on which a first fixing claw (11) suitable for accommodating the first shaft (2) is provided. An extending oil cylinder (4) is further provided inside the housing structure (1). The extending end of the extending oil cylinder (4) is connected to a push rod (5) to drive the push rod (5) to move linearly. A limiting block (6) is provided at one end of the housing structure (1) close to the push rod (5). The limiting block (6) is rotatably arranged inside the housing structure (1) via a pin shaft (7). When the limiting block (6) is in an initial state, the limiting block (6) is suitable for partially blocking the opening of the first fixing claw (11) to limit the first shaft (2) from slipping out of the first fixing claw (11).

2. The novel quick-change grasping structure according to claim 1, wherein The other end of the push rod (5) is provided with a second fixing claw (51). After the first shaft (2) is placed in the first fixing claw (11), the second fixing claw (51) extends out via the extending end of the extending oil cylinder (4) to accommodate and grip the second shaft (3).

3. The novel quick-change grasping structure according to claim 2, wherein, The attachment is arranged in the extending direction of the extending oil cylinder (4).

4. The novel quick-change gripping structure according to claim 1, characterized in that, The limiting block (6) is of an L-shaped structure. The pin shaft (7) is arranged at the bending part of the L-shaped limiting block (6). One end of the push rod (5) is suitable for driving it to press against a bending part of the limiting block (6) when the extending oil cylinder (4) retracts, so that the other bending part of the limiting block (6) rotates until the opening of the first fixing claw (11) is completely opened.

5. The novel quick-change grasping structure according to claim 4, characterized in that, A torsion spring (8) is further provided on the pin shaft (7). The torsion spring (8) is suitable for self-resetting and driving the limiting block (6) to rotate around the pin shaft (7). When the torsion spring (8) is in an initial state, it is suitable for driving the limiting block (6) to partially block the opening of the first fixing claw (11).

6. The novel quick-change grasping structure according to claim 5, characterized in that, A limiting block (6) stop pin is further provided within the rotation stroke range of the limiting block (6). The limiting block (6) stop pin is suitable for restricting the limiting block (6) from continuously rotating in a set direction.

7. An excavator, characterized in that, The novel quick-change grasping structure according to any one of claims 1 to 6 is adopted.

8. An engineering machinery, characterized in that, The novel quick-change grasping structure according to any one of claims 1 to 6 is adopted.

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