Hinge self-locking structure

Abstract

The invention relates to the technical field of hinges, and discloses a hinge self-locking structure which comprises a fixed hinge, a movable hinge and a rotating shaft, a first shaft sleeve is arranged on the fixed hinge, a second shaft sleeve and a third shaft sleeve are arranged on the movable hinge, the rotating shaft sequentially penetrates through the second shaft sleeve, the first shaft sleeve and the third shaft sleeve, and a first key groove is formed in the inner wall of the first shaft sleeve. A second key groove is formed in the inner wall of the second shaft sleeve, a transmission key matched with the second key groove is arranged at the first end of the rotating shaft, a check block is arranged at the second end of the rotating shaft, an elastic piece is arranged between the check block and the third shaft sleeve, and the elastic piece applies acting force to the check block away from the third shaft sleeve. According to the hinge self-locking structure, when the movable hinge rotates to a set position relative to the fixed hinge, the rotating shaft axially moves, the transmission key is located in the first key groove and the second key groove at the same time, then the movable hinge and the fixed hinge are locked, the self-locking function is achieved, and only the rotating shaft needs to be triggered to reset during unlocking.

Description

Technical Field

[0001] The present invention relates to the technical field of hinges, and in particular to a hinge self-locking structure. Background Art

[0002] A hinge structure usually consists of a fixed leaf (connecting a fixed object), a movable leaf (connecting a movable object), and a hinge shaft connecting the two. The hinge shaft passes through the shaft holes on the fixed leaf and the movable leaf to achieve relative rotation between the fixed leaf and the movable leaf.

[0003] The traditional hinge structure can only achieve relative rotation and cannot achieve self-locking. For some special applications, such as when used on a door cover that opens relative to the surrounding wall, an additional locking device needs to be set on the door cover to keep the door cover open at a certain angle, which is inconvenient to use and increases the complexity of the structure. Summary of the Invention

[0004] Based on the above problems, an object of the present invention is to provide a hinge self-locking structure.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A hinge self-locking structure includes a fixed leaf, a movable leaf, and a rotating shaft, wherein a first shaft sleeve is provided on the fixed leaf, a second shaft sleeve and a third shaft sleeve are provided on the movable leaf, and the rotating shaft is sequentially inserted into the second shaft sleeve, the first shaft sleeve, and the third shaft sleeve, and a first key groove is provided on the inner wall of the first shaft sleeve, and a second key groove is provided on the inner wall of the second shaft sleeve, a transmission key is provided at the first end of the rotating shaft to cooperate with the second key groove, a stopper is provided at the second end of the rotating shaft, and an elastic member is provided between the stopper and the third shaft sleeve, the elastic member exerting a force to keep the stopper away from the third shaft sleeve;

[0007] When the first keyway and the second keyway are in an axially misaligned state, the transmission key is only located in the second keyway, and the movable page can rotate freely relative to the fixed page;

[0008] When the first keyway and the second keyway are in axial alignment, the rotating shaft moves axially under the action of the elastic member, the transmission key is located in the first keyway and the second keyway at the same time, and the movable page is locked with the fixed page.

[0009] As an optional solution, the elastic member is a compression spring sleeved on the rotating shaft.

[0010] As an optional solution, a threaded section is provided at the second end of the rotating shaft, and the stopper is threadably engaged with the threaded section, so that the compression amount of the compression spring by the stopper is adjustable.

[0011] As an optional solution, a first end block is provided at the second end of the rotating shaft, and the first end block is fixedly connected to the rotating shaft through a cotter pin. The first end block is used to limit the stop block and serve as a pressing part for driving the rotating shaft to axially reset.

[0012] As an optional solution, the first end portion of the rotating shaft is provided with a second end block, and the second end block is used to limit the second sleeve.

[0013] As an optional solution, the transmission key is a flat key, and a third key groove for installing the flat key is provided on the first end side surface of the rotating shaft.

[0014] As an optional solution, both the fixed page and the movable page include a mounting plate, fixing bolts are provided on the mounting plate, and a connecting plate is provided between the mounting plate and the first shaft sleeve, the second shaft sleeve or the third shaft sleeve.

[0015] Beneficial effects of the present invention:

[0016] The hinge self-locking structure is designed with a first key slot, a second key slot, a transmission key, an elastic member, etc., which can realize axial movement of the rotating shaft when the movable page rotates to a set position relative to the fixed page. The transmission key is located in the first key slot and the second key slot at the same time, thereby locking the movable page and the fixed page to achieve a self-locking function. When unlocking, it is only necessary to trigger the rotating shaft to reset. The overall structure is simple and reliable, easy to operate, and meets the usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 1 is a front view of a self-locking hinge structure provided by an embodiment of the present invention;

[0018] Figure 2 is a top view of a hinge self-locking structure provided by an embodiment of the present invention;

[0019] Figure 3 is a side view of a hinge self-locking structure provided by an embodiment of the present invention;

[0020] Figure 4 is a schematic diagram of a rotating shaft in a self-locking hinge structure provided by an embodiment of the present invention;

[0021] Figure 5 yes Figure 1 Cross-sectional view at AA in the middle.

[0022] In the attached figure:

[0023] 1. Fixed page; 2. Movable page; 3. Rotating shaft; 4. First sleeve; 5. Second sleeve; 6. Third sleeve; 7. First keyway; 8. Second keyway; 9. Drive key; 10. Stop block; 11. Compression spring; 12. Threaded section; 13. First end block; 14. Split pin; 15. Second end block; 16. Third keyway; 17. Mounting plate; 18. Fixing bolt; 19. Connecting plate. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0025] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first", "second", etc. are only used to distinguish in description and have no special meaning.

[0029] See also Figures 1 to 5As shown, this embodiment provides a hinge self-locking structure, including a fixed page 1, a movable page 2 and a rotating shaft 3, a first shaft sleeve 4 is provided on the fixed page 1, a second shaft sleeve 5 and a third shaft sleeve 6 are provided on the movable page 2, the rotating shaft 3 is sequentially passed through the second shaft sleeve 5, the first shaft sleeve 4 and the third shaft sleeve 6, and a first key groove 7 is provided on the inner wall of the first shaft sleeve 4, a second key groove 8 is provided on the inner wall of the second shaft sleeve 5, a first end of the rotating shaft 3 is provided with a transmission key 9 that cooperates with the second key groove 8, a second end of the rotating shaft 3 is provided with a stopper 10, and an elastic member is provided between the stopper 10 and the third shaft sleeve 6, and the elastic member gives the stopper 10 a force away from the third shaft sleeve 6.

[0030] The first keyway 7 and the second keyway 8 are in an axially misaligned state, the transmission key 9 is only located in the second keyway 8, and the movable page 2 can rotate freely relative to the fixed page 1;

[0031] The first key groove 7 and the second key groove 8 are in an axially aligned state, the rotating shaft 3 moves axially under the action of the elastic member, the transmission key 9 is located in the first key groove 7 and the second key groove 8 at the same time, and the movable page 2 is locked with the fixed page 1.

[0032] Therefore, through the design of the first key groove 7, the second key groove 8, the transmission key 9, the elastic part, etc., the axial movement of the rotating shaft 3 can be achieved when the movable page 2 rotates to the set position relative to the fixed page 1, and the transmission key 9 is simultaneously located in the first key groove 7 and the second key groove 8, thereby locking the movable page 2 and the fixed page 1 to achieve a self-locking function. When unlocking, it is only necessary to trigger the rotating shaft 3 to reset. The overall structure is simple and reliable, easy to operate, and meets the use requirements.

[0033] In at least one embodiment, the elastic member is a compression spring 11 sleeved on the rotating shaft 3 , and the compression spring 11 provides an axial force for the rotating shaft 3 to move toward its second end.

[0034] Considering the shear force exerted by the first keyway 7 on the transmission key 9 in the self-locking state, the depth of the transmission key 9 inserted into the first keyway 7 can be adjusted by varying the compression of the compression spring 11. Specifically, a threaded section 12 is provided at the second end of the rotating shaft 3, and the stopper 10 is threadedly engaged with the threaded section 12, allowing the compression of the compression spring 11 by the stopper 10 to be adjustable.

[0035] Furthermore, a first end block 13 is provided at the second end portion of the rotating shaft 3. The first end block 13 is fixedly connected to the rotating shaft 3 via a cotter pin 14. The first end block 13 is used to limit the stop block 10 and to serve as a pressing portion for driving the rotating shaft 3 to axially reset.

[0036] The use of the cotter pin 14 allows for quick disassembly and assembly of the first end block 13 and the rotating shaft 3, facilitating structural assembly and replacement of wearing parts. In addition, when unlocking is required, by pressing the first end block 13, the rotating shaft 3 can overcome the force of the compression spring 11 and move toward the first end of the rotating shaft 3, so that the transmission key 9 is moved out of the first key slot 7, thereby allowing the movable page 2 to resume free rotation.

[0037] When the first keyway 7 and the second keyway 8 are in axial alignment, in order to avoid excessive force of the compression spring 11, which causes excessive axial displacement of the rotating shaft 3 and abnormal depth of the transmission key 9 in the first keyway 7 or the second keyway 8, a second end block 15 is provided at the first end of the rotating shaft 3. The second end block 15 is used to limit the second sleeve 5, thereby ensuring that the transmission key 9 enters the first keyway 7 to an appropriate depth.

[0038] In some embodiments, the transmission key 9 is a flat key, and a third keyway 16 for receiving the flat key is formed on the first end side surface of the rotating shaft 3. In particular, the head end of the flat key is arc-shaped so that the flat key can smoothly enter the first keyway 7 when the first keyway 7 and the second keyway 8 are axially aligned.

[0039] Optionally, both the fixed page 1 and the movable page 2 include a mounting plate 17 , on which fixing bolts 18 are provided, and a connecting plate 19 is provided between the mounting plate 17 and the first shaft sleeve 4 , the second shaft sleeve 5 or the third shaft sleeve 6 .

[0040] The following is a further explanation using the example of the hinge self-locking structure being applied to a door cover.

[0041] The fixed page 1 is fixed to the surrounding wall by fixing bolts 18, the movable page 2 is fixed to the door cover by fixing bolts 18, and the rotating shaft 3 passes through the first shaft sleeve 4 on the fixed page 1, the second shaft sleeve 5 and the third shaft sleeve 6 on the movable page 2, so that the movable page 2 and the fixed page 1 can rotate relative to each other.

[0042] When the door cover is closed, one end of the compression spring 11 is limited by the stopper 10 and the cotter pin 14, and the other end abuts against the third sleeve 6, thereby forming an axial thrust on the rotating shaft 3. However, since the first keyway 7 and the second keyway 8 are in an axially misaligned state, as shown in FIG. Figure 5 As shown, the axial movement of the rotating shaft 3 is restricted, the transmission key 9 cannot enter the first key groove 7, and the movable page 2 can rotate freely relative to the fixed page 1;

[0043] When the door cover is opened, the movable leaf 2 rotates with the rotating shaft 3, and the fixed leaf 1 is fixed. When the movable leaf 2 rotates to a certain angle, that is, the first key groove 7 and the second key groove 8 are axially aligned, the rotating shaft 3 moves axially under the action of the compression spring 11, and the transmission key 9 enters the first key groove 7. Since the first shaft sleeve 4 is fixed, the second shaft sleeve 5 is locked, that is, the movable leaf 2 cannot move, and the hinge is self-locking.

[0044] When the door cover needs to be closed, the rotating shaft 3 is pushed back manually or in other ways to make the transmission key 9 leave the first key slot 7, then the hinge is unlocked and the movable page 2 can rotate freely relative to the fixed page 1.

[0045] Thus, from the perspective of optimizing the hinge, the function of self-locking the door cover after it is opened to a set angle is achieved, without the need to design other locking devices, thus simplifying the overall structure of the door cover and making it easier to use.

[0046] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A self-locking hinge structure comprising a fixed leaf (1), a movable leaf (2) and a rotating shaft (3), characterized in that: The fixed page (1) is provided with a first shaft sleeve (4), the movable page (2) is provided with a second shaft sleeve (5) and a third shaft sleeve (6), the rotating shaft (3) is sequentially passed through the second shaft sleeve (5), the first shaft sleeve (4) and the third shaft sleeve (6), and a first key groove (7) is provided on the inner wall of the first shaft sleeve (4), a second key groove (8) is provided on the inner wall of the second shaft sleeve (5), a transmission key (9) matched with the second key groove (8) is provided at the first end of the rotating shaft (3), a stopper (10) is provided at the second end of the rotating shaft (3), an elastic member is provided between the stopper (10) and the third shaft sleeve (6), and the elastic member applies a force to the stopper (10) away from the third shaft sleeve (6); When the first keyway (7) and the second keyway (8) are in an axially misaligned state, the transmission key (9) is located only in the second keyway (8), and the movable page (2) can rotate freely relative to the fixed page (1); The first keyway (7) and the second keyway (8) are in an axially aligned state, the rotating shaft (3) moves axially under the action of the elastic member, the transmission key (9) is simultaneously located in the first keyway (7) and the second keyway (8), and the movable page (2) is locked with the fixed page (1).

2. The hinge self-locking structure according to claim 1, characterized in that: The elastic member is a compression spring (11) sleeved on the rotating shaft (3).

3. The hinge self-locking structure according to claim 2, characterized in that: The second end of the rotating shaft (3) is provided with a threaded section (12), and the stopper (10) is threadably engaged with the threaded section (12), so that the compression amount of the compression spring (11) exerted by the stopper (10) is adjustable.

4. The hinge self-locking structure according to claim 1, characterized in that: The second end portion of the rotating shaft (3) is provided with a first end block (13), the first end block (13) is fixedly connected to the rotating shaft (3) via a cotter pin (14), the first end block (13) is used to limit the stop block (10), and is used as a pressing portion for driving the rotating shaft (3) to axially reset.

5. The hinge self-locking structure according to claim 1, characterized in that: The first end portion of the rotating shaft (3) is provided with a second end block (15), and the second end block (15) is used to limit the position of the second shaft sleeve (5).

6. The hinge self-locking structure according to claim 1, characterized in that: The transmission key (9) is a flat key, and a third key groove (16) for installing the flat key is provided on the first end side surface of the rotating shaft (3).

7. The hinge self-locking structure according to claim 1, characterized in that: The fixed page (1) and the movable page (2) both include a mounting plate (17), a fixing bolt (18) is provided on the mounting plate (17), and a connecting plate (19) is provided between the mounting plate (17) and the first shaft sleeve (4), the second shaft sleeve (5) or the third shaft sleeve (6).

Images