A large buffer travel box door hinge

Abstract

A large buffer stroke door hinge comprises a main body and a trigger hinged thereto, a pulling arm being slidably installed in the main body, one end of the pulling arm being hinged to the trigger, and the other end of the pulling arm being provided with a tension spring connected to the main body, the tension spring always pulling the trigger to move in the closing direction through the pulling arm, and the characteristic is that a damping arm is also slidably installed in the main body, a damper is installed between the damping arm and the main body, when the trigger is closed, the damping arm is pushed to move linearly by the circular rotation of the outer contour trajectory of the extrusion guide rod, and the damping arm pushes the damper to move linearly, generating a damping effect when the trigger is closed. The beneficial effect of the present invention is that an independent damping arm is provided to directly contact the trigger, and when the trigger is closed, the damping arm is directly pushed to move, which can effectively increase the movement stroke of the damping arm, thereby increasing the buffer stroke of the buffer, and while improving the buffering effect, the service life of the buffer with a larger buffer stroke can be greatly improved.

Description

Technical Field

[0001] The invention relates to a hinge, in particular to a box door hinge with a large buffer stroke. Background Art

[0002] In existing appliances with doors, such as ovens and baking ovens, the door hinges typically rely on spring tension or elastic force, employing a torsional pull mechanism. To open the door, the door is pulled, stretching or compressing the spring, allowing it to open. To close the door, simply release the spring, and the door closes due to the spring's return action. In practice, because the spring's return action generates a certain acceleration, the door experiences its greatest kinetic energy just before closing, resulting in a faster speed and a louder closing sound. This impact can easily damage the door if subjected to such impact over time. A common approach involves attaching a shock-absorbing material, such as sponge, to the door frame. However, this approach still results in significant potential energy in the tension spring, making it susceptible to damage. Another approach involves installing a damper in the hinge to slow the door's closing speed. This typically involves a fixed damper mounted inside the hinge, acting on the hinge's pull arm. However, the pull arm's travel during the hinge's opening and closing is relatively small, resulting in a relatively small damping stroke for the damper. This requires the damper to be able to achieve relatively strong damping in a very short stroke, which places high demands on the performance of the damper. Therefore, this type of damper is not only expensive, but also has a relatively short service life. Therefore, it is necessary to make further improvements to it. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a large buffer stroke door hinge with a simple structure, easy use, and the ability to increase the buffer stroke of the buffer, extend the service life of the buffer, and enhance the hinge buffering capacity.

[0004] The object of the present invention is achieved in the following way: a large buffer stroke box door hinge, which includes a main body and a trigger hinged thereto, a pulling arm is slidably installed in the main body, one end of the pulling arm is hinged to the trigger, and the other end of the pulling arm is provided with a tension spring connected to the main body, and the tension spring always pulls the trigger to move in the closing direction through the pulling arm, and is characterized in that: a damping arm is also slidably installed in the main body, and a damper is installed between the damping arm and the main body. When the trigger is closed, the guide rod is extruded through the circular rotation of its outer contour trajectory to push the damping arm to move linearly, and the damping arm pushes the damper to move linearly, thereby generating a damping effect when the trigger is closed.

[0005] The main body is provided with a first guide groove and a second guide groove, and the damping arm is slidably installed in the first guide groove and the second guide groove through the first guide rod and the second guide rod.

[0006] The tail of the pulling arm is provided with a linking arm, the tail of the linking arm is connected with a tension spring, and the tension spring drives the trigger to move through the linking arm and the pulling arm.

[0007] The tail of the damping arm is provided with an air-avoiding groove, and the linking arm passes through the air-avoiding groove and enters the damping arm to be connected with the pulling arm.

[0008] The pulling arm and the linkage arm are hinged via a third guide rod, which passes through the avoidance areas on both sides of the damping arm and is connected to third guide grooves arranged on both sides of the main body, and slides back and forth in the third guide groove.

[0009] The cylinder part of the damper is fixedly connected to the main body, and the piston rod part of the damper is connected to the damping arm.

[0010] A shift fork is also installed in the pulling arm in a sliding manner back and forth, and a guide wheel is installed on the top of the shift fork. The guide wheel slides on the outer contour of the trigger, and the trigger is also provided with an inwardly concave locking groove; a push spring is installed on the outer sleeve of the shift fork, and the push spring pushes the guide wheel to always move in the direction of the trigger.

[0011] The present invention has the following beneficial effects: 1. It has a simple structure, low production costs, and improved market competitiveness. 2. It is provided with an independent damping arm that directly contacts the trigger. When the trigger is closed, it directly pushes the damping arm to move, effectively increasing the movement stroke of the damping arm, thereby increasing the buffer's buffer stroke. While improving the buffering effect, the buffer with a larger buffer stroke can significantly extend its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the hinge closed state in the present invention.

[0013] Figure 2 This is a schematic diagram of the hinge in the open state of the present invention.

[0014] Figure 3 、 4 This is the structural assembly diagram of the present invention.

[0015] Figure 5 This is a cross-sectional view of the hinge structure in the closed state in the present invention.

[0016] Figure 6 This is a cross-sectional view of the hinge structure in the open state according to the present invention. DETAILED DESCRIPTION

[0017] The present invention is further described below in detail with reference to the accompanying drawings. A large-stroke door hinge comprises a main body 1 and a trigger 2 hinged thereto. A pull arm 3 is slidably mounted within the main body 1, one end of the pull arm 3 being hinged to the trigger 2. A tension spring 4 is provided at the other end of the pull arm 3 and connected to the main body 1. The tension spring 4, through the pull arm 3, constantly pulls the trigger 2 in the closing direction. The hinge is characterized in that a damping arm 5 is also slidably mounted within the main body 1, with a damper 7 mounted between the damping arm 5 and the main body 1. When the trigger 2 is closed, the circular rotation of its outer contour extrudes a guide rod 51, pushing the damping arm 5 in linear motion. The damping arm 5 pushes the damper 6 in linear motion, producing a damping effect on the trigger 2 as it closes.

[0018] The main body 1 is provided with a first guide groove 11 and a second guide groove 12 , and the damping arm 5 is slidably installed in the first guide groove 11 and the second guide groove 12 via a first guide rod 51 and a second guide rod 52 .

[0019] The tail of the pulling arm 3 is provided with a linkage arm 7, and the tail of the linkage arm 7 is connected to the tension spring 4. The tension spring 4 drives the trigger 2 to move through the linkage arm 7 and the pulling arm 3.

[0020] The tail of the damping arm 5 is provided with an air-avoiding groove 53 , and the linkage arm 7 passes through the air-avoiding groove 53 and enters the damping arm 5 to be connected with the pulling arm 3 .

[0021] The pulling arm 3 and the linkage arm 7 are hinged via a third guide rod 71 . The third guide rod 71 passes through the clearance areas 54 on both sides of the damping arm 5 and is connected to the third guide grooves 13 provided on both sides of the main body 1 , and slides back and forth in the third guide grooves 13 .

[0022] The cylinder portion of the damper 6 is fixedly connected to the main body 1 , and the piston rod portion of the damper 6 is connected to the damping arm 5 .

[0023] A shift fork 8 is also installed in the pulling arm 3 in a sliding manner back and forth, and a guide wheel 81 is installed on the top of the shift fork 8. The guide wheel 81 slides on the outer contour of the trigger 2, and the trigger 2 is also provided with an inwardly concave locking groove 21; the shift fork 8 is sheathed with a push spring 82, which pushes the guide wheel 81 to always move in the direction of the trigger 2.

[0024] Working principle: Figure 2 As shown, the hinge is in the open state. In this state, when the box door is in the open state, the pulling arm is in the state of stretching the tension spring, and the trigger is in the open position.

[0025] like Figure 1 As shown, when the door is to be closed, the trigger begins to swing in the closing direction under the action of the tension spring. Through the hinged connection between the pull arm and the trigger, the pull arm is acted upon by the tension spring, pulling the trigger to move in the closing direction of the door, thereby achieving automatic closing of the door.

[0026] During the hinge closing process, the guide rod on the damping arm contacts the outer contour of the trigger. As the trigger is pulled, the damping arm is squeezed, pushing the damper to start moving. The damper creates a damping effect, slowing the closing movement of the trigger and controlling the force and speed of the hinge closing process.

[0027] Compared with traditional technology: the damper in this case acts directly on the trigger through the damping arm. Among them, since the contact point between the trigger and the guide rod deviates further from the distance between the hinge point between the trigger and the main body, therefore, according to the principle of lever, the trigger can drive the damping arm to move to a greater extent during the opening and closing process. By utilizing the larger movement stroke of the damping arm, when matching the corresponding damper, a damper with a larger buffer stroke can be selected. Generally, the larger the buffer stroke of the damper, the lower its damping strength during operation. At the same time, its manufacturing and processing difficulty is also less than that of the damper with a small buffer stroke. Therefore, while ensuring the damping effect and service life, it reduces the production cost and improves the damping effect when the hinge is opened and closed. Finally, the hinge achieves the smooth closing and reliability of the box door, so it can be widely promoted and used.

[0028] The basic principles, main features and advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A large-buffered travel door hinge, comprising a main body (1) and a trigger (2) hinged thereto, wherein a pull arm (3) is slidably mounted in the main body (1), one end of the pull arm (3) is hinged to the trigger (2), and the other end of the pull arm (3) is provided with a tension spring (4) connected to the main body (1), and the tension spring (4) always pulls the trigger (2) to move in the closing direction through the pull arm (3), and is characterized in that: A damping arm (5) is also slidably mounted in the main body (1), and a damper (6) is mounted between the damping arm (5) and the main body (1). When the trigger (2) is closed, the damping arm (5) is pushed to move linearly by the circular rotation of the outer contour of the extrusion guide rod (51), and the damping arm (5) pushes the damper (6) to move linearly, thereby generating a damping effect on the trigger (2) when it is closed. The main body (1) is provided with a first guide groove (11) and a second guide groove (12), and the damping arm (5) is slidably mounted in the first guide groove (11) and the second guide groove (12) via a first guide rod and a second guide rod (52); The tail of the pulling arm (3) is provided with a linkage arm (7), the tail of the linkage arm (7) is connected to the tension spring (4), and the tension spring (4) drives the trigger (2) to move through the linkage arm (7) and the pulling arm (3); The tail of the damping arm (5) is provided with a clearance groove (53), and the linkage arm (7) passes through the clearance groove (53) and enters the damping arm (5) to be connected with the pulling arm (3).

2. The large-buffer-travel door hinge according to claim 1, characterized in that: The pulling arm (3) and the linkage arm (7) are hinged via a third guide rod (71). The third guide rod (71) passes through the clearance areas (54) on both sides of the damping arm (5) and is connected to the third guide grooves (13) provided on both sides of the main body (1). The third guide rod (71) slides back and forth in the third guide grooves (13).

3. The large-buffer-travel door hinge according to claim 1, characterized in that: The cylinder portion of the damper (6) is fixedly connected to the main body (1), and the piston rod portion of the damper (6) is connected to the damping arm (5).

4. The large-buffer-travel door hinge according to claim 1, characterized in that: A shift fork (8) is also installed in a forward and backward sliding manner in the pulling arm (3), and a guide wheel (81) is installed on the top of the shift fork (8). The guide wheel (81) slides on the outer contour of the trigger (2), and the trigger (2) is also provided with a concave locking groove (21); a push spring (82) is installed on the outer sleeve of the shift fork (8), and the push spring (82) pushes the guide wheel (81) to always move in the direction of the trigger (2).

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