Quick connector for connecting accessories

Abstract

The invention discloses a quick connector for connecting accessories. The quick connector comprises a shell, an oil cylinder, a first lock hook, a second lock hook and a connecting assembly. The head of the first lock hook and the head of the second lock hook are installed on the shell and used for being connected with a first pin shaft and a second pin shaft of the accessory in an abutting mode respectively. The connecting assembly comprises a blocking shaft, a first swing rod, a second swing rod and an elastic element. The two ends of the first swing rod are connected with the blocking shaft and the tail of the second lock hook. One end of the second oscillating rod is rotationally mounted on the shell, and the other end of the second oscillating rod is in transmission connection with the first oscillating rod through a blocking shaft; the two ends of the elastic element are connected with the second swing rod and the second lock hook. The two ends of the oil cylinder are connected with the first lock hook and the blocking shaft respectively. The quick connector is simple in structure, convenient to use and high in safety.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery excavator technology, and in particular to a quick connector for connecting attachments. Background Technology

[0002] As construction projects demand increasingly diverse operational capabilities from excavators, quick-connect couplings are finding wider application as a crucial component. These couplings connect excavators to their attachments (such as buckets, breakers, and hydraulic shears), enabling rapid switching and installation of various attachments. This saves time and manpower compared to disassembling pins for attachment changes, thus improving work efficiency. Currently, small-tonnage excavators mostly use mechanical quick-connect couplings. Existing semi-automatic hydraulic quick-connect couplings require manual insertion of the pin after the connection is complete as a safety measure. This is prone to accidents due to operator forgetfulness, and the safety pin is easily lost when the machine is idle for extended periods. Furthermore, this type of coupling lacks additional safety measures for the connecting pin; damage to the locking system of the connecting shaft can easily lead to accidents. Summary of the Invention

[0003] Objective: In order to overcome the shortcomings of the existing technology, the present invention provides a quick connector for connecting attachments, which can be installed and removed by operating the extension and retraction of the hydraulic cylinder. Even if the hydraulic cylinder fails, it can still lock the attachment, thus ensuring high safety.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0005] In a first aspect, the present invention provides a quick connector for connecting attachments, comprising a housing, a hydraulic cylinder, a first locking hook, a second locking hook, and a connecting assembly; The heads of the first and second locking hooks are mounted on the housing and are respectively used to abut against the first and second pins of the attachment; The connecting assembly includes a blocking shaft, a first swing rod, a second swing rod, and an elastic element; both ends of the first swing rod are connected to the blocking shaft and the tail of the second locking hook; one end of the second swing rod is rotatably mounted on the housing, and the other end is connected to the first swing rod via the blocking shaft; both ends of the elastic element are connected to the second swing rod and the second locking hook. The two ends of the hydraulic cylinder are respectively connected to the first locking hook and the blocking shaft.

[0006] This quick-connector, through the mechanical design of the first locking hook, second locking hook, and connecting components, achieves locking of the attachment pin. Even if the hydraulic cylinder is damaged, the attachment can still be locked by this mechanical device, greatly improving safety and reliability. During use, the operator can remotely control the hydraulic cylinder from the cab to automatically complete the work, making it convenient to operate and highly efficient.

[0007] In some embodiments, a cylinder connecting shaft is provided at the connection between the cylinder and the first locking hook, for causing the first locking hook to approach or disengage from the first pin of the attachment under the drive of the cylinder.

[0008] In some embodiments, the tail of the second locking hook is provided with a pivot shaft, and the second locking hook is rotatably connected to the first swing rod through the pivot shaft.

[0009] In some embodiments, the housing is a component structure or an integral forged casting structure.

[0010] In some embodiments, the first locking hook is in the shape of a locking hook or a rocker arm; when the first locking hook is in the shape of a rocker arm, a protrusion is provided on the housing below the first locking hook, the protrusion being hook-shaped and used to accommodate the first pin.

[0011] In some embodiments, the elastic element is a tension spring or a torsion spring.

[0012] In some embodiments, the elastic element is provided with one or more.

[0013] In a second aspect, the present invention provides a method of operating a quick connector for a connecting attachment as described in the first aspect, comprising: When installing the quick connector, first push the first pin of the attachment to the first locking hook inside the housing, and then screw the second pin of the attachment into the second locking hook inside the housing; activate the hydraulic cylinder to lock the first locking hook into the first pin and the second locking hook into the second pin. When removing the quick connector, activate the hydraulic cylinder to disengage the first locking hook from the first pin and the second locking hook from the second pin; first disengage the second pin of the attachment from the quick connector housing, and then disengage the first pin of the attachment from the quick connector housing.

[0014] Thirdly, the present invention provides an engineering machine, wherein the attachments of the engineering machine are connected to the working arm of the engineering machine via a quick connector for connecting attachments as described in the first aspect.

[0015] Beneficial effects:

[0016] The quick connector of the connecting attachment provided by this invention has a simple structure and low manufacturing cost; it can automatically lock and unlock throughout the process under the action of the hydraulic cylinder without the need for additional operation; the pin can be locked by means of the mechanical structure of the hydraulic cylinder, the first locking hook, the second locking hook and the connecting component, and the attachment will not fall off even if the hydraulic cylinder fails; it has strong versatility and is suitable for attachments with different shaft distances. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the planar structure of the quick connector for connecting attachments in Embodiment 1 of the present invention.

[0019] Figure 2 This is a three-dimensional structural diagram of the quick connector for connecting attachments in Embodiment 1 of the present invention.

[0020] Figure 3 This is a three-dimensional structural diagram of the quick connector for connecting attachments in Embodiment 2 of the present invention.

[0021] Figure 4 This is a schematic diagram of the disassembly process of the quick connector of the connecting attachment in Embodiment 3 of the present invention.

[0022] Figure 5 This is a three-dimensional structural diagram of the quick connector for connecting attachments in Embodiment 4 of the present invention.

[0023] In the diagram: 1. Housing; 10. Rotating shaft; 11. First swing rod; 12. Blocking shaft; 13. Second swing rod; 14. Second hook lock; 15. Tension spring; 2. Hydraulic cylinder; 20. First locking hook; 21. Hydraulic cylinder connecting shaft; 22. Hydraulic cylinder partition; 23. Protrusion; 3. First pin; 4. Second pin; 5. Bucket; 6. Quick connector for connecting attachments; 51. Connecting rod; 52. Rocker arm; 53. Bucket hydraulic cylinder; 54. Bucket stick. Detailed Implementation

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0025] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may include different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0026] Example 1:

[0027] This embodiment provides a quick connector for connecting attachments, such as... Figure 1 and Figure 2 As shown, the attachment includes a housing 1, a hydraulic cylinder 2, a first locking hook 20, a second locking hook 14, and a connecting assembly. The heads of the first locking hook 20 and the second locking hook 14 are mounted on the housing 1 and are respectively used to abut against the first pin 3 and the second pin 4 of the attachment. A hydraulic cylinder connecting shaft 21 is provided at the connection between the hydraulic cylinder 1 and the first locking hook 20, which is used to allow the first locking hook 20 to approach or disengage from the first pin 3 of the attachment under the drive of the hydraulic cylinder 2.

[0028] The connecting assembly includes a blocking shaft 12, a first swing rod 11, a second swing rod 13, and a tension spring 15. Both ends of the first swing rod 11 are connected to the blocking shaft 12 and the tail of the second locking hook 14. One end of the second swing rod 13 is rotatably mounted on the housing 1, and the other end is connected to the first swing rod 11 via the blocking shaft 12. Both ends of the tension spring 15 are connected to the second swing rod 13 and the second locking hook 14. Both ends of the hydraulic cylinder 2 are connected to the first locking hook 20 and the blocking shaft 12, respectively. The tail of the second locking hook 14 is provided with a rotating shaft 10, and the second locking hook 14 is rotatably connected to the first swing rod 11 via the rotating shaft 10.

[0029] In this embodiment, the housing 1 is an integral forged casting structure.

[0030] In this embodiment, the first locking hook 20 is in the shape of a rocker arm, and a protrusion 23 is provided on the housing 1 below the first locking hook 20. The protrusion 23 is in the shape of a hook and is used to accommodate the first pin 3.

[0031] During normal use, the first locking hook 20, under the action of the hydraulic cylinder 2, pushes against the first pin 3 to the left, and the second hook lock 14, under the action of the hydraulic cylinder 2, hooks the second pin 4, locking the entire system. If the distance between the first pin 3 and the second pin 4 increases, the first locking hook 20 can swing to the left under the action of the hydraulic cylinder 2, clamping the first pin 3 and keeping the attachment stable.

[0032] When the hydraulic cylinder fails, the first pin 3 and the second pin 4 of the attachment tend to move: When the attachment moves to the left, the first locking hook 20 is not under force, the up-and-down movement of the first pin 3 is restricted by the housing 1, and the second pin 4 exerts a leftward force on the second hook lock 14. At this time, the second hook lock 14 and the first swing rod 11 tend to rotate clockwise, which further drives the second swing rod 13 to rotate counterclockwise. The clockwise rotation of the second locking hook 14 is blocked by the blocking shaft 12. Therefore, the second locking hook 14 is in a locked state and cannot move, remaining locked. The tension spring 15 can ensure that when the second locking hook 14 is not naturally locked in a special position without the pushing force of the second pin 4, it is locked in this position and will not be released. When the attachment moves to the right, the first locking hook 20 moves slightly to the right under the action of the first pin 3. However, because the second pin 4 is locked by the second hook lock 14 and the housing 1, the attachment will still be fixed inside the quick connector and the entire attachment will not fall off.

[0033] Example 2:

[0034] This embodiment provides a quick connector for connecting attachments, such as... Figure 3 As shown, the difference from Embodiment 1 is that the first locking hook 20 is in the shape of a locking hook, and the bent part is used to accommodate the first pin 3.

[0035] Example 3:

[0036] This embodiment provides a method for operating the quick connector of the connecting attachment as described in Embodiment 1, such as... Figure 4 As shown in sections a to d, including: When installing the quick connector, first push the first pin 3 of the attachment to the first locking hook 20 inside the housing 1, and then screw the second pin 4 of the attachment into the second locking hook 14 inside the housing 1; start the hydraulic cylinder 2 to lock the first pin 3 with the first locking hook 20 and the second pin 4 with the second locking hook 14. When removing the quick connector, as Figure 4 As shown, start the hydraulic cylinder 2 to disengage the first locking hook 20 from the first pin 3 and the second locking hook 14 from the second pin 4; first disengage the second pin 4 of the attachment from the housing 1 of the quick connector, and then disengage the first pin 3 of the attachment from the housing 1 of the quick connector.

[0037] Example 4:

[0038] This embodiment provides an excavator, such as Figure 5 As shown, it includes a bucket 5, a quick connector 6 for connecting attachments, a connecting rod 51, a rocker arm 52, a bucket cylinder 53, and a stick 54. The bucket 5 is connected to the connecting rod 51 and the stick 54 through the quick connector 6 for connecting attachments.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "up," "down," "front," "rear," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to explain the relative positional relationship and movement between components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. These terms are used only for the convenience of describing the invention and for simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention.

[0040] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A quick connector for connecting attachments, characterized in that, Includes a housing, a hydraulic cylinder, a first locking hook, a second locking hook, and a connecting assembly; The heads of the first and second locking hooks are mounted on the housing and are respectively used to abut against the first and second pins of the attachment; The connecting assembly includes a blocking shaft, a first swing rod, a second swing rod, and an elastic element; both ends of the first swing rod are connected to the blocking shaft and the tail of the second locking hook; one end of the second swing rod is rotatably mounted on the housing, and the other end is connected to the first swing rod via the blocking shaft; both ends of the elastic element are connected to the second swing rod and the second locking hook. The two ends of the hydraulic cylinder are respectively connected to the first locking hook and the blocking shaft.

2. The quick connector for the connecting attachment according to claim 1, characterized in that, The connection between the hydraulic cylinder and the first locking hook is provided with a hydraulic cylinder connecting shaft, which is used to make the first locking hook approach or disengage from the first pin of the attachment under the drive of the hydraulic cylinder.

3. The quick connector for the connecting attachment according to claim 1, characterized in that, The second locking hook has a rotating shaft at its tail, and the second locking hook is rotatably connected to the first swing rod through the rotating shaft.

4. The quick connector for the connecting attachment according to claim 1, characterized in that, The housing is a component structure or an integral forged casting structure.

5. The quick connector for the connecting attachment according to claim 1 or 2, characterized in that, The first locking hook is in the shape of a locking hook or a rocker arm; when the first locking hook is in the shape of a rocker arm, a protrusion is provided on the housing below the first locking hook, and the protrusion is hook-shaped to accommodate the first pin.

6. The quick connector for the connecting attachment according to claim 1, characterized in that, The elastic element is a tension spring or a torsion spring.

7. The quick connector for the connecting attachment according to claim 1 or 6, characterized in that, The elastic element is provided in one or more forms.

8. A method of operating a quick connector for a connecting attachment as described in any one of claims 1-7, characterized in that, include: When installing the quick connector, first push the first pin of the attachment into the first locking hook inside the housing, and then screw the second pin of the attachment into the second locking hook inside the housing. Start the hydraulic cylinder to lock the first locking hook into the first pin and the second locking hook into the second pin; When removing the quick connector, activate the hydraulic cylinder to disengage the first locking hook from the first pin and the second locking hook from the second pin; first disengage the second pin of the attachment from the quick connector housing, and then disengage the first pin of the attachment from the quick connector housing.

9. An engineering machinery, characterized in that, The attachments of the construction machinery are connected to the working arm of the construction machinery via a quick connector for connecting attachments as described in any one of claims 1-7.

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