A quick connector for excavator attachments and a device for preventing detachment thereof

Abstract

The utility model relates to excavator technical field, specifically to a kind of excavator accessory quick connector and its anti-drop device.The anti-drop device of excavator accessory quick connector of the application, including shell, hinged on the rear hook body of the shell, the shell is equipped with the locking mechanism for the control rear hook body rotation, the locking mechanism includes locking piece installed on the shell, the matching piece matched with the locking piece, the matching piece is connected with the rear hook body, locking piece is connected with driving element, the driving element is used to drive the locking piece movement to realize locking or unlocking, so as to can provide effective safety measures, convenient connection, reduce manpower cost, make excavator can quickly replace the connection of various accessories, with great application value and popularization value;And effectively avoid the rear hook of quick connector, automatically open under the condition of non-human operation, cause the accident of accessory drop.

Description

Technical Field

[0001] This utility model relates to the field of excavator technology, specifically to an excavator attachment quick connector and its anti-detachment device. Background Technology

[0002] Compared to traditional excavators, existing excavators can be equipped with different accessories, such as buckets, rippers, breakers, and hydraulic shears. With different accessories, multiple tasks can be performed without changing the excavator itself. In contrast, changing accessories on traditional excavators requires manual installation by operators. Due to the large size and weight of the accessories, manual installation is difficult. Therefore, quick connectors installed at the front end of the excavator arm have been developed. Excavators equipped with quick connectors can change different accessories as needed.

[0003] For example, patent number CN218466608U discloses a quick connector for excavators, including a housing, an oil cylinder installed inside the housing, two telescopic shafts connected to the movable end of the oil cylinder, two hooks connected to one side of the housing, and a top cover on the top of the housing and the two hooks. However, this connector cannot be perfectly compatible with all attachments, because the pin positions, spacing, and diameters of buckets or attachments from different manufacturers and of different models may vary. Utility Model Content

[0004] The purpose of this utility model is to at least solve one of the technical problems existing in the prior art, and to provide a quick connector for excavator attachments and its anti-detachment device.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an anti-disengagement device for a quick connector of an excavator attachment, comprising a housing and a rear hook hinged to the housing, wherein the housing is provided with a locking mechanism for controlling the rotation of the rear hook, the locking mechanism comprising a locking member installed on the housing and a mating member matching the locking member, the mating member being connected to the rear hook, and a driving member connected to the locking member, the driving member being used to drive the locking member to move to achieve locking or unlocking.

[0006] Furthermore, the driving component is a rotating shaft that passes through the housing, and the locking component is fixed to the rotating shaft.

[0007] Furthermore, a radially extending operating handle is provided at the outer end of the shaft.

[0008] Furthermore, the locking element is a pawl, and the mating element is a ratchet that matches the pawl, with a plurality of tooth grooves on the ratchet.

[0009] Furthermore, it also includes a reset mechanism, which is a torsion spring sleeved on the rotating shaft.

[0010] Furthermore, one end of the torsion spring is fixed to the housing, and the other end is fixed to the pawl of the rotating shaft. The torsion spring biases the pawl into the tooth groove of the ratchet to prevent the rear hook from rotating and opening.

[0011] Furthermore, the working end of the pawl is provided with a guide slope, and the tooth groove of the ratchet is provided with a self-locking slope, forming a one-way non-reverse connection through the cooperation of the guide slope and the self-locking slope.

[0012] Furthermore, the housing is provided with a pawl motion guide rail, which is used to constrain the pawl to reciprocate along an arc-shaped trajectory.

[0013] A quick connector for excavator attachments includes a front hook and a rotatable rear hook, the rear hook being equipped with the aforementioned anti-disengagement device.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. The anti-detachment device of this application includes a housing and a rear hook hinged to the housing. The housing is provided with a locking mechanism for controlling the rotation of the rear hook. The locking mechanism includes a locking member installed on the housing and a mating member that matches the locking member. The mating member is connected to the rear hook. A driving member is connected to the locking member. The driving member is used to drive the locking member to move to achieve locking or unlocking, thereby providing effective safety measures, facilitating connection, reducing labor costs, and enabling excavators to quickly change the connection of various attachments. It has great application and promotion value; and effectively prevents the rear hook of the quick connector from automatically opening without human operation, causing the attachment to fall off.

[0015] 2. Through the mutual cooperation of the locking pawl and the mating ratchet of this application, when it is necessary to change the attachment, simply rotate the shaft to make the pawl disengage from the ratchet, and the rear hook can be rotated and opened, which facilitates the workers to quickly assemble or disassemble and effectively improves work efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the anti-disengagement device for the quick connector of excavator attachments in a preferred embodiment of this utility model; Figure 2 This is a top view of the anti-disengagement device for the quick connector of excavator attachments in a preferred embodiment of this utility model; Figure 3 This is a cross-sectional view of the anti-disengagement device of the quick connector for excavator attachments in a preferred embodiment of the present invention; Figure 4 This is a schematic diagram of the rear hook unlocking structure in a preferred embodiment of the present invention.

[0017] Reference numerals in the attached drawings: 1. Housing; 2. Rear hook; 3. Pawl; 4. Ratchet; 5. Torsion spring; 6. Rotary shaft; 7. Operating handle. Detailed Implementation

[0018] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0019] Reference Figures 1-4 As shown in the preferred embodiment of this utility model, an anti-disengagement device for a quick connector for excavator attachments includes a housing 1 and a rear hook 2 hinged to the housing 1. The housing 1 is provided with a locking mechanism for controlling the rotation of the rear hook 2. The locking mechanism includes a locking member installed on the housing and a mating member that matches the locking member. The mating member is connected to the rear hook. A driving member is connected to the locking member. The driving member is used to drive the locking member to move to achieve locking or unlocking, thereby providing effective safety measures, facilitating connection, reducing labor costs, and enabling excavators to quickly change the connection of various attachments. It has great application and promotion value; and effectively prevents the rear hook of the quick connector from automatically opening without human operation, causing the attachment to fall off.

[0020] As a preferred embodiment of this utility model, it may also have the following additional technical features: the driving component is a rotating shaft 6 that passes through the housing 1, and the locking component is fixed on the rotating shaft 6; and the outer end of the rotating shaft 6 is provided with a radially extending operating handle 7, thereby allowing the driver to lock / unlock the vehicle in the cab with a single lever, without the need for tools or complex actions.

[0021] In this embodiment, the locking component is a pawl 3, and the mating component is a ratchet 4 that matches the pawl 3. The ratchet 4 has several toothed grooves. This achieves a self-locking structure between the pawl and the ratchet, effectively preventing accidental unlocking of the rear hook.

[0022] This embodiment also includes a reset mechanism, which is a torsion spring 5 sleeved on the rotating shaft 6. One end of the torsion spring 5 is fixed to the housing 1, and the other end is fixed to the pawl 3 of the rotating shaft 6. The torsion spring 5 biases the pawl 3 into the tooth groove of the ratchet 4 to prevent the rear hook 2 from rotating and opening. Thus, by continuously providing biasing force through the torsion spring, the pawl is kept in close contact with the ratchet tooth groove, realizing a fail-safe mode. Even if the operator does not actively lock it, it can automatically prevent disengagement and effectively prevent the attachment from falling off.

[0023] In this embodiment, the working end of the pawl 3 is provided with a guide slope, and the tooth groove of the ratchet 4 is provided with a self-locking slope. The cooperation between the guide slope and the self-locking slope forms a one-way anti-reverse mechanism, which effectively resists the vibration and impact during excavator operation and prevents the rear hook from being accidentally unlocked.

[0024] In this embodiment, the housing 1 is provided with a pawl motion guide rail, which is used to constrain the pawl 3 to reciprocate along an arc trajectory, thereby avoiding lateral load, reducing wear on parts, and extending service life.

[0025] A quick connector for excavator attachments includes a front hook and a rotatable rear hook, the rear hook being equipped with the aforementioned anti-disengagement device.

[0026] The working principle of this utility model is as follows: To prevent the rear hook of the quick connector from automatically opening without human intervention, thus preventing the attachment from falling off, this application includes a rotating shaft 6 mounted on the housing 1 of the quick connector. A pawl 3 is connected to the rotating shaft 6, and a torsion spring 5 is installed between the pawl 3 and the housing 1. A ratchet 4 is mounted on the rear hook of the quick connector. Under normal conditions, the pawl 3, under the action of the torsion spring 5, keeps the ratchet 4 locked, preventing the rear hook 2 of the quick connector from rotating and opening, thus preventing accidents.

[0027] When it is necessary to change attachments, the rear hook 2 needs to be opened. At this time, simply rotate the pivot 6 to make the pawl 3 disengage from the ratchet 4, and the rear hook 2 can be rotated open.

[0028] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0029] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this utility model.

Claims

1. An anti-disengagement device for a quick connector of an excavator attachment, characterized in that: The device includes a housing and a rear hook hinged to the housing. The housing is provided with a locking mechanism for controlling the rotation of the rear hook. The locking mechanism includes a locking member mounted on the housing and a mating member that matches the locking member. The mating member is connected to the rear hook. A driving member is connected to the locking member. The driving member is used to drive the locking member to move in order to lock or unlock.

2. The anti-disengagement device for the quick connector of excavator attachments according to claim 1, characterized in that: The driving component is a rotating shaft that passes through the housing, and the locking component is fixed to the rotating shaft.

3. The anti-disengagement device for the quick connector of excavator attachments according to claim 2, characterized in that: The outer end of the rotating shaft is provided with a radially extending operating handle.

4. The anti-disengagement device for the quick connector of excavator attachments according to claim 3, characterized in that: The locking component is a pawl, and the mating component is a ratchet that matches the pawl. The ratchet has several tooth grooves.

5. The anti-disengagement device for the quick connector of excavator attachments according to claim 4, characterized in that: It also includes a reset mechanism, which is a torsion spring sleeved on the rotating shaft.

6. The anti-disengagement device for the quick connector of excavator attachments according to claim 5, characterized in that: One end of the torsion spring is fixed to the housing, and the other end is fixed to the pawl of the rotating shaft. The torsion spring biases the pawl to engage with the tooth groove of the ratchet to prevent the rear hook from rotating and opening.

7. The anti-disengagement device for the quick connector of excavator attachments according to claim 6, characterized in that: The working end of the pawl is provided with a guide slope, and the tooth groove of the ratchet is provided with a self-locking slope. The cooperation between the guide slope and the self-locking slope forms a one-way non-reverse mechanism.

8. The anti-disengagement device for the quick connector of excavator attachments according to claim 7, characterized in that: The housing is provided with a pawl motion guide rail, which is used to constrain the pawl to reciprocate along an arc-shaped trajectory.

9. A quick connector for excavator attachments, characterized in that: It includes a front hook and a rotatable rear hook, wherein the rear hook is equipped with an anti-slip device as described in any one of claims 1-8.

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