Small self-locking hinge for hatches

Abstract

The utility model belongs to the field of mechanical part fixing, and relates to a small self-locking hinge for hatch cover. The small self-locking hinge for hatch cover comprises a hinge block, a base, a thick pin shaft, a lock stick and a self-locking nut 7; a locking spring is arranged on the back of the hinge block, two pairs of mounting holes are formed in the side walls of the base recess, the thick pin shaft is screwed and fixed through the front mounting hole by the self-locking nut, and the lock stick is welded and fixed in the rear pair of mounting holes; the hinge block tail passes through the thick pin shaft and can be turned around it. When the hinge block is folded back, the locking spring on the back of the hinge block first contacts the lock stick in interference, is elastically deformed to form locking force, is first folded back, is continuously folded back, is returned to normal, is stuck in the arc of the lock stick, and the locking effect is achieved. When the hinge block is folded forward, the locking spring on the back of the hinge block is folded back in interference, passes the lock stick and is separated, and the locking effect is ended. The hinge has the locking function, has the advantages of convenient operation, automatic locking and separation, opening and closing safety and the like.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical component fixing and relates to a small self-locking hinge for a hatch cover. Background Technology

[0002] The existing small hatch cover hinge consists of a hinge block 1, a base 2, a pin 3, and a self-locking nut 4. The front end of the hinge block 1 is welded to the hatch cover, and the rear end is connected to the base 2 via the pin 3 and the self-locking nut 4. The base 2 is welded to the hatch body for fixation. The hatch is opened and closed by rotating and folding the hinge.

[0003] Combination Figure 1 During the opening and closing of the hatch, hinge block 1 can only move along with it and cannot fix the opened hatch at a limited angle. The hatch will swing freely under the influence of gravity, affecting the opening and closing of the hatch and posing a risk of injury. Utility Model Content

[0004] The purpose of this invention is to provide a self-locking hinge. After the hatch is opened to a certain angle, the hinge can lock at this angle. When it is necessary to close the hatch, a closing force is applied to the hatch, and the hinge elastically releases, closing the hatch as it closes. It has a locking function and is convenient to operate and safe to open and close.

[0005] To achieve the above objectives, the present invention adopts the following solution:

[0006] A small self-locking hinge for a hatch includes a hinge block 1, a base 2, a coarse pin 5, a locking rod 6, and a self-locking nut 7. A locking spring is provided on the back of the hinge block 1. The base 2 has a structure with a groove in the middle. Two pairs of mounting holes are opened on the two side walls of the groove of the base 2. The coarse pin 5 passes through the front mounting hole and is tightened and fixed by the self-locking nut 7. The locking rod 6 is welded and fixed in the rear pair of mounting holes. The tail of the hinge block 1 passes through the coarse pin 5 and can be rotated around it.

[0007] When hinge block 1 folds backward, the locking spring on the back of hinge block 1 first makes interference contact with locking rod 6, and after elastic deformation, it generates locking force. The locking spring first folds back, and as it continues to fold backward, the locking spring returns to its original position and locks at the arc of locking rod 6, achieving the locking effect. When hinge block 1 folds forward, the locking spring on the back of hinge block 1 folds back with interference, passes over locking rod 6 and disengages, ending the locking effect.

[0008] The advantage of this invention lies in the fact that, unlike traditional hinges, the hinge block has an elastic spring at its tail, which can contact the locking rod welded to the rear of the base to form an interference fit, creating a locking force and achieving the locking effect of the hinge. Therefore, this hinge has a locking function and features convenient operation, automatic locking and disengagement, and safe opening and closing. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of an existing small hatch cover hinge;

[0010] Figure 2 This is a schematic diagram of the self-locking hinge of this utility model;

[0011] Figure 3 This is a schematic diagram of the locking and unlocking of the self-locking hinge of this utility model. Detailed Implementation

[0012] like Figure 2 As shown, the small self-locking hinge for the hatch includes a hinge block 1, a base 2, a coarse pin 5, a locking rod 6, and a self-locking nut 7.

[0013] A locking spring is provided on the back of hinge block 1. The base 2 has a groove in the middle. Two pairs of mounting holes are opened on the two side walls of the groove of the base 2. The coarse pin 5 passes through the front mounting hole and is tightened and fixed with the self-locking nut 7. The locking rod 6 is welded and fixed in the rear pair of mounting holes. The tail of hinge block 1 passes through the coarse pin 5 and can be rotated around it.

[0014] like Figure 3 When hinge block 1 folds backward, the locking spring on the back of hinge block 1 first makes interference contact with locking rod 6, and after elastic deformation, it forms a locking force. The locking spring first folds back, and as it continues to fold backward, the locking spring returns to its original position and is locked at the arc of locking rod 6, achieving the locking effect. When hinge block 1 folds forward, the locking spring on the back of hinge block 1 folds back with interference, passes over locking rod 6 and disengages, ending the locking effect.

[0015] The advantage of this invention lies in the fact that, unlike traditional hinges, the hinge block has an elastic spring at its tail, which can contact the locking rod welded to the rear of the base to form an interference fit, creating a locking force and achieving the locking effect of the hinge. Therefore, this hinge has a locking function and features convenient operation, automatic locking and disengagement, and safe opening and closing.

Claims

1. A small self-locking hinge for a hatch cover, characterized in that, It includes a hinge block 1, a base 2, a coarse pin 5, a locking rod 6, and a self-locking nut 7; a locking spring is provided on the back of the hinge block 1, the base 2 has a structure with a groove in the middle, and two pairs of mounting holes are opened on the two side walls of the groove of the base 2. The coarse pin 5 passes through the front mounting hole and is tightened and fixed by the self-locking nut 7, and the locking rod 6 is welded and fixed in the rear pair of mounting holes; the tail of the hinge block 1 passes through the coarse pin 5 and can rotate around it.

2. The small self-locking hinge for a hatch as described in claim 1, characterized in that, When hinge block 1 folds backward, the locking spring on the back of hinge block 1 first makes interference contact with locking rod 6, and after elastic deformation, it forms a locking force. The locking spring first folds back, and then continues to fold backward. The locking spring returns to its original position and is stuck at the arc of locking rod 6, thus achieving the locking effect.

3. A small self-locking hinge for a hatch as described in claim 2, characterized in that, When hinge block 1 flips forward, the locking spring on the back of hinge block 1 over-folds back, passes over locking rod 6 and disengages, ending the locking effect.

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