Self-closing safety grab hook

Abstract

The present invention is a self-closing safety grab hook, which includes a connecting carrier, a tension spring, a quadrilateral mechanism, a hook carrier, and a closing rod; a limit stop is provided at the lower part of the connecting carrier, and a first round hole and a second round hole are provided at both ends corresponding to the upper limit of the limit stop on the connecting carrier; the connecting carrier is pivotally connected to one side of the quadrilateral mechanism through the first round hole; the connecting carrier is pivotally connected to the pull rod through the second round hole; the hook carrier is provided with a U-shaped groove fixedly connected to the limit stop, and the upper arm of the U-shaped groove is pivotally connected to the quadrilateral mechanism; the lower arm of the U-shaped groove is pivotally connected to the pull rod; the hook carrier is connected to the connecting carrier through the tension spring; a hook is provided at the bottom of the hook carrier; the upper part of the closing rod is pivotally connected to the other end of the quadrilateral mechanism, the middle part of the closing rod is pivotally connected to the pull rod, and the lower part of the closing rod is fixedly connected to the hook in a closed manner. Under normal conditions, the hook is in an open state, and when there is a heavy object hanging, the hook will automatically close. It solves the problem of preventing the object from falling off during the movement when hanging the object.

Description

Technical Field

[0001] The present invention relates to the field of automation equipment, and specifically to a self-closing safety grab hook. Background Art

[0002] Under the background of Industry 4.0 of automation equipment, saving manpower has been infinitely expanded, and reasonably creating functions of intelligent equipment to adapt to it has become an important future trend; existing hooks only have a single hook structure, and individual hooks are equipped with anti-disengagement insurance, but there is a lack of a self-closing hook. Summary of the Invention

[0003] The present invention is a self-closing safety grab hook, which realizes self-closing by using the principle of quadrilateral translation and the principle of mechanism self-locking under the action of gravity.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A self-closing safety grab hook includes a connection carrier, a tension spring, a quadrilateral mechanism, a hook carrier, and a closing rod; a limit stop is provided at the lower part of the connection carrier, and a first round hole and a second round hole are provided at both ends corresponding to the upper limit of the limit stop on the connection carrier; the connection carrier is pivotally connected to one side of the quadrilateral mechanism through the first round hole; the connection carrier is pivotally connected to a pull rod through the second round hole; the hook carrier is provided with a U-shaped groove fixedly connected to the limit stop, the upper arm of the U-shaped groove is pivotally connected to the quadrilateral mechanism; the lower arm of the U-shaped groove is pivotally connected to the pull rod; the hook carrier is connected to the connection carrier through a tension spring; a hook is provided at the bottom of the hook carrier; the upper part of the closing rod is pivotally connected to the other end of the quadrilateral mechanism, the middle part of the closing rod is pivotally connected to the pull rod, and the lower part of the closing rod is connected to the hook in a closed manner.

[0006] The beneficial effects of the present invention are:

[0007] The safety grab hook is in an open state due to the stretching effect of the spring. Since it is open before hanging and lifting an object, it is convenient for the carrier to be hooked and lifted, easy to operate, and less likely to pinch hands, having a certain degree of safety. Brief Description of the Drawings

[0008] Figure 1 It is a schematic diagram of the open state of the hook of the present invention.

[0009] Figure 2 It is a schematic diagram of the closed state of the hook of the present invention.

[0010] Figure 3 It is a schematic diagram of the interior of the hook of the present invention in the open state.

[0011] Figure 4 It is a schematic diagram of the interior of the hook of the present invention in the closed state.

[0012] Figure 5It is a schematic diagram of the connection between the closing rod and the hook latch when the hook is in the closed state of the present invention. DETAILED DESCRIPTION

[0013] The following is attached to the instruction manual Figures 1-5 The present invention is further described in detail with reference to the accompanying drawings.

[0014] A self-closing safety grab hook comprises a connecting carrier 1, a tension spring 2, a quadrilateral mechanism 3, a hook carrier 4 and a closing rod 5; a limit gear 6 is provided at the lower part of the connecting carrier 1, and a first circular hole and a second circular hole are provided at both ends of the upper limit of the limit gear 6 corresponding to the connecting carrier 1; the connecting carrier 1 is axially connected to one side of the quadrilateral mechanism 3 through the first circular hole; the connecting carrier 1 is axially connected to the pull rod 7 through the second circular hole; the hook carrier 4 is provided with a U-shaped groove which is fixedly connected to the limit gear 6, and the upper arm of the U-shaped groove is axially connected to the quadrilateral mechanism 3; the lower arm of the U-shaped groove is axially connected to the pull rod 7; the hook carrier 4 is connected to the connecting carrier 1 through the tension spring 2; a hook 8 is provided at the bottom of the hook carrier 4; the upper part of the closing rod 5 is axially connected to the other end of the quadrilateral mechanism 3, the middle part of the closing rod 5 is axially connected to the pull rod 7, and the lower part of the closing rod 5 is closed and connected with the hook 8.

[0015] A lifting ring is provided on the top of the connection carrier 1.

[0016] The limit stop 6 and the U-shaped groove can be connected in a sliding groove manner, so that the limit stop 6 can slide at the bottom of the U-shaped groove to prevent the hook 8 from shaking.

[0017] like Figure 5 As shown, the lower part of the closing rod 5 can also be provided with a latch structure, which is inserted into the body of the hook 8 to make the closure more secure.

[0018] A discharge handle 9 may also be provided at the center of the hook carrier 4 to facilitate the removal of heavy objects from the hook 8 .

[0019] Example

[0020] Before using the safety hook, the hook is in a normally open state due to the tension of the spring. The heavy object carrier can be directly placed on the hook. Figure 1 As shown. When the heavy object is placed on the hook Figure 2 As shown, due to the effect of gravity, the safety hook device will automatically close, and the hook will not open before the weight is removed, which has a certain degree of safety. After the weight is safely removed, the safety hook device will return to the normally open state due to the stretching effect of the spring.

[0021] Working principle: When the heavy object carrier is placed on the safety hook device, the load increases, breaking the original balance state, and the closing rod will move until the safety hook device is closed, and the carrier will not slide. After the carrier is safely removed, the safety hook device will return to the normally open state due to the stretching effect of the spring. Cooperate with the automation equipment to work safely.

Claims

1. A self-closing safety grab hook device, It is characterized in that It comprises a connecting carrier (1), a tension spring (2), a quadrilateral mechanism (3), a hook carrier (4), and a closing rod (5); A limit stop (6) is provided at the lower part of the connection carrier (1), and a first circular hole and a second circular hole are provided at both ends of the upper limit of the connection carrier (1) corresponding to the limit stop (6); the connection carrier (1) is axially connected to one side of the quadrilateral mechanism (3) through the first circular hole; and the connection carrier (1) is axially connected to the pull rod (7) through the second circular hole. The hook carrier (4) is provided with a U-shaped groove which is fixedly connected to the limit stop (6); the upper arm of the U-shaped groove is axially connected to the quadrilateral mechanism (3); the lower arm of the U-shaped groove is axially connected to the pull rod (7); the hook carrier (4) is connected to the connection carrier (1) via a tension spring (2); and a hook (8) is provided at the bottom of the hook carrier (4); The upper portion of the closing rod (5) is axially connected to the other end of the quadrilateral mechanism (3), the middle portion of the closing rod (5) is axially connected to the pull rod (7), and the lower portion of the closing rod (5) is closed and connected to the hook (8).

2. A self-closing safety grab hook according to claim 1, It is characterized in that A lifting ring is provided on the top of the connection carrier (1).

3. A self-closing safety grab hook according to claim 1, It is characterized in that The lower part of the closing rod (5) is also provided with a latch structure which is inserted into the body of the hook (8) to make the closure more secure.

4. A self-closing safety grab hook according to claim 1, It is characterized in that The central part of the hook carrier (4) is also provided with a unloading handle to facilitate the removal of heavy objects from the hook (8).

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