Hidden hinge with oil injection hole

Abstract

The utility model provides a hidden hinge with an oil filling hole, which belongs to the field of building hardware fittings and comprises a rotating shaft, a first hinge and a second hinge, the rotating shaft is sleeved with the first hinge and the second hinge, the first hinge and the second hinge are both provided with rotating holes matched with the rotating shaft in a sleeved mode, and the rotating holes of the first hinge and the second hinge are coaxially arranged. The first hinge or the second hinge or both the first hinge and the second hinge are provided with oil injection holes, the oil injection holes are communicated with the rotating holes, and the hinges are provided with V-shaped oil injection holes communicated with the rotating holes, so that lubricating oil can be more conveniently injected into axis rotating parts of the hinges through the oil injection holes. In addition, the V-shaped oil injection hole has a certain drainage effect on the lubricating oil, and the convenience and the filling efficiency of adding the lubricating oil can be improved.

Description

Technical Field

[0001] This utility model belongs to the field of architectural hardware accessories, and in particular relates to a concealed hinge with an oil injection hole. Background Technology

[0002] Concealed hinges (also known as hidden hinges or concealed hinges) are hardware connection devices that achieve concealed installation by embedding the hinge body inside doors, windows, or furniture. Their core design lies in the pre-embedded installation, flush with the surface of the profile, avoiding the exposed defects of traditional surface-mounted hinges, thus enhancing the overall aesthetics of furniture and doors. This technology is widely used in cabinets, wardrobes, industrial electrical boxes, casement windows, and other fields, ensuring smooth opening and closing of doors while enhancing sealing and reducing the risk of external dust and moisture intrusion through the concealed structure. Furthermore, it meets aesthetic requirements such as narrow frames and flush frame-sash design in high-end homes and precision equipment settings.

[0003] In the existing technology, the rotating parts of the hidden hinge are significantly more difficult to lubricate and maintain due to their enclosed structure. After long-term use, the core components are prone to problems such as abnormal opening and closing noise and rotation jamming due to the lubricating oil drying out or insufficient lubrication, which affects the user experience and service life. Summary of the Invention

[0004] Based on the aforementioned problems in the existing technology, this utility model provides a concealed hinge with an oil injection hole, including a rotating shaft, and a first hinge and a second hinge sleeved on the rotating shaft. Both the first hinge and the second hinge are provided with a rotating hole that matches the rotating shaft. The rotating holes of the first hinge and the second hinge are coaxially arranged, and the rotating shaft is sleeved in the rotating hole. The first hinge or the second hinge, or both the first hinge and the second hinge, are provided with an oil injection hole that communicates with the rotating hole.

[0005] The oil injection hole is located at one end of the rotating hole. The oil injection hole is a "V" shaped hole with a rounded corner at the tip of the "V" shape. The tip of the "V" shape faces the center of the rotating hole along the axial direction.

[0006] The first hinge is a U-shaped structure with rotating holes at both ends of the U-shape. The first hinge is rotatably fitted onto the two ends of the rotating shaft through the rotating holes at both ends. The second hinge is a rectangular structure that matches and fits into the opening of the U-shaped structure. A rotating hole is provided on one side of the rectangular structure. The second hinge is fitted onto the middle of the rotating shaft through the rotating hole.

[0007] The rotating shaft is provided with a rotating sleeve, a rotating washer, or a bearing, and the rotating holes of the first hinge and the second hinge are fitted onto the rotating shaft through the rotating sleeve, the rotating washer, or the bearing.

[0008] The rotating shaft is fixedly equipped with decorative shaft covers at both ends. By covering the two ends of the rotating shaft with decorative shaft covers, it can not only avoid collision damage, but also change the appearance color to meet personalized needs.

[0009] The rotating hole is provided with a mounting cavity that matches the rotating sleeve or bearing. The depth of the mounting cavity is greater than the length of the rotating sleeve or bearing, so that an oil storage cavity is formed in the mounting cavity. The oil injection hole and the oil storage cavity are connected.

[0010] Both the first hinge and the second hinge are provided with a leaf section. The cross-sectional shape of the leaf section of the first hinge and the second hinge is the same. A clamping and fixing block is fixedly installed on one side of the leaf section by a mounting bolt. The clamping and fixing block and the leaf section cooperate to form a clamping groove on both sides of the leaf section.

[0011] The sheet portion is provided with a limiting groove on the side facing the clamping and fixing block, and the clamping and fixing block is provided with a limiting protrusion that matches the limiting groove on the side facing the sheet portion.

[0012] The sheet portion has a first positioning groove at the central axis of the corresponding limiting groove, and the limiting protrusion has a second positioning groove on the central axis.

[0013] The beneficial effects of this utility model are:

[0014] 1. The hinge is equipped with a "V"-shaped oil injection hole that connects to the rotating hole, which makes it easier to inject lubricating oil into the rotating part of the hinge shaft through the oil injection hole, maintaining the smooth rotation of the hinge and ensuring its service life. In addition, the "V"-shaped oil injection hole has a certain guiding effect on the lubricating oil, which can improve the convenience and efficiency of adding lubricating oil.

[0015] An oil reservoir is formed inside the rotating hole, which allows a certain amount of lubricating oil to be stored inside, thereby improving the lubrication effect and reducing the maintenance frequency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a three-dimensional structure of a concealed hinge with an oil injection hole.

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure at the axis of rotation.

[0018] Figure 3 This is a schematic diagram of the exploded structure of the second hinge.

[0019] Figure 4 This is a schematic diagram of the exploded structure of the second hinge from another angle.

[0020] Figure 5 This is a schematic diagram of the exploded structure of the first hinge.

[0021] Figure 6 This is a schematic diagram of the exploded structure of the first hinge from another angle.

[0022] Figure 7 This is a top view of a concealed hinge with an oil injection hole.

[0023] Figure 8 yes Figure 7 A schematic diagram of the cross-sectional structure at line AA.

[0024] Figure 9 yes Figure 8 Enlarged view of point A. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] As attached Figure 1-9 The illustrated concealed hinge with an oil injection hole includes a rotating shaft 1, and a first hinge 2 and a second hinge 3 fitted onto the rotating shaft 1. Both the first hinge 2 and the second hinge 3 include a leaf portion 4. One side of each end of the leaf portion 4 of the first hinge 2 is provided with a connecting portion 5. The connecting portion 5 extends laterally and is provided with a rotating hole 6 that matches and fits onto the rotating shaft 1, so that the first hinge 2 forms a "U" shape with rotating holes 6 at both ends of the "U". The first hinge 2 is rotatably fitted onto the two ends of the rotating shaft 1 through the rotating holes 6 at both ends. The leaf portion 4 of the second hinge 3 is a rectangular structure that matches and fits into the opening of the "U" shape of the first hinge 2. One side of the leaf portion 4 of the second hinge 3 is also provided with a rotating hole 6 that matches and fits onto the rotating shaft 1. The second hinge 3 is fitted onto the middle part of the rotating shaft 1 through the rotating hole 6. The rotating holes 6 of the first hinge 2 and the second hinge 3 are coaxially arranged, and the rotating shaft 1 is fitted into the rotating hole 6.

[0027] The rotating shaft 1 is provided with four rotating sleeves 7, each rotating sleeve 7 including an integrally formed limiting ring 8 and a bushing 9, from top to bottom ( Figure 2 The bushings 9 of the first and second rotating sleeves 7 (in the direction shown) are downward, and the bushings 9 of the third and fourth rotating sleeves 7 are upward. An upper washer bearing 10 is provided above the limiting ring 8 of the second rotating sleeve 7, and a lower washer bearing 11 is provided below the limiting ring 8 of the third rotating sleeve 7. The rotating holes 6 at both ends of the "U" shape of the first hinge 2 are respectively fitted onto the rotating shaft 1 between the first rotating sleeve 7 and the upper washer bearing 10, and between the fourth rotating sleeve 7 and the lower washer bearing 11. The rotating hole 6 of the second hinge 3 is fitted onto the rotating shaft 1 between the second and third rotating sleeves 7. Decorative shaft caps 12 are fixed at both ends of the rotating shaft 1 by threads.

[0028] Both ends of the first hinge 2 are provided with oil injection holes 13. The oil injection holes 13 are connected to the rotating holes 6. The upper oil injection hole 13 is located at the uppermost end of the upper rotating hole 6, and the lower oil injection hole 13 is located at the lowermost end of the lower rotating hole 6. The oil injection hole 13 is a "V" shaped hole with a rounded corner at the tip of the "V". The tip of the "V" faces the middle of the rotating hole 6 along the axial direction. That is, the tip of the "V" of the lower oil injection hole 13 faces upward, and the tip of the "V" of the upper oil injection hole 13 faces downward. The rotating hole 6 is provided with a mounting cavity that matches the bushing 9 of the rotating sleeve 7. The depth of the mounting cavity is greater than the length of the bushing 9 of the rotating sleeve 7, so that an oil storage cavity 14 is formed in the mounting cavity. The upper oil injection hole 13 is connected to the uppermost oil storage cavity 14 through the gap between the bushing 9 and the inner wall of the rotating hole 6. The lower oil injection hole 13 is connected to the lowermost oil storage cavity 14 through the gap between the bushing 9 and the inner wall of the rotating hole 6.

[0029] In a preferred embodiment, the leaf portion 4 of the first hinge 2 and the second hinge 3 have the same cross-sectional shape. A clamping and fixing block 15 is fixedly installed on one side of the leaf portion 4 by a mounting bolt. The clamping and fixing block 15 and the leaf portion 4 cooperate to form clamping grooves 16 on both sides of the leaf portion 4. When the hinge is installed on the profile, the clamping groove 16 can be tightened by tightening the mounting bolt, and the hinge can be clamped and fixed to the profile through the clamping groove 16.

[0030] The blade portion 4 is provided with a limiting groove 17 on the side facing the clamping block 15. The clamping block 15 is provided with a limiting protrusion 19 on the side facing the blade portion 4, which matches the limiting groove 17. The limiting protrusion 19 can not only improve the structural strength of the clamping block 15, but also limit the relative position of the blade portion 4 and the clamping block 15 within a certain range. The blade portion 4 is provided with a first positioning groove 20 at the central axis corresponding to the limiting groove 17. The limiting protrusion 19 is provided with a second positioning groove 18 on the central axis. The first positioning groove 20 and the second positioning groove 18 can provide a certain limiting effect on the drill bit, which can prevent the drill bit from shifting laterally during drilling. The first positioning groove 20 and the second positioning groove 18 can accurately open bolt holes on the blade portion 4 and the clamping block 15.

[0031] When the hinge provided in this embodiment is in use, lubricating oil can be injected into the rotating holes 6 at both ends of the first hinge 2 through the oil injection hole 13. The lubricating oil flows through the gaps between the components to the oil storage chamber 14 for storage, and then slowly flows to other positions in the rotating holes 6, continuously providing lubricating oil to the rotating parts of the shaft, maintaining smooth rotation and stability, while extending the maintenance cycle and reducing the maintenance frequency.

[0032] The above-described embodiments are merely one implementation of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A concealed hinge with an oil injection hole, comprising a rotating shaft (1), and a first hinge (2) and a second hinge (3) fitted onto the rotating shaft (1), wherein both the first hinge (2) and the second hinge (3) are provided with rotating holes (6) that match the rotating shaft (1), the rotating holes (6) of the first hinge (2) and the second hinge (3) are coaxially arranged, and the rotating shaft (1) is fitted into the rotating holes (6), characterized in that, The first hinge (2) or the second hinge (3), or the first hinge (2) and the second hinge (3) are provided with an oil injection hole (13), which is connected to the rotating hole (6); the oil injection hole (13) is located at one end of the rotating hole (6), the oil injection hole (13) is a "V" shaped hole and the tip of the "V" is rounded, and the tip of the "V" is oriented towards the middle of the rotating hole (6) along the axial direction.

2. A concealed hinge with an oil injection hole according to claim 1, characterized in that, The first hinge (2) is a "U" shaped structure. The first hinge (2) has a rotating hole (6) at both ends of the "U". The first hinge (2) is rotated and fitted onto both ends of the rotating shaft (1) through the rotating holes (6) at both ends. The second hinge (3) is a rectangular structure that matches and fits into the opening of the "U" shaped structure. A rotating hole (6) is provided on one side of the rectangular structure. The second hinge (3) is fitted onto the middle part of the rotating shaft (1) through the rotating hole (6).

3. A concealed hinge with an oil injection hole according to claim 2, characterized in that, A rotating sleeve (7), a rotating washer, or a bearing is provided on the rotating shaft (1). The rotating holes (6) of the first hinge (2) and the second hinge (3) are fitted onto the rotating shaft (1) through the rotating sleeve (7), the rotating washer, or the bearing.

4. A concealed hinge with an oil injection hole according to claim 3, characterized in that, Decorative shaft caps (12) are fixedly installed at both ends of the rotating shaft (1).

5. A concealed hinge with an oil injection hole according to claim 3, characterized in that, The rotating hole (6) is provided with an installation cavity that matches the rotating sleeve (7) or the bearing. The depth of the installation cavity is greater than the length of the rotating sleeve (7) or the bearing, so that an oil storage cavity (14) is formed in the installation cavity. The oil injection hole (13) and the oil storage cavity (14) are connected.

6. A concealed hinge with an oil injection hole according to claim 1, characterized in that, Both the first hinge (2) and the second hinge (3) are provided with a leaf piece (4). The leaf pieces (4) of the first hinge (2) and the second hinge (3) have the same cross-sectional shape. A clamping and fixing block (15) is fixedly installed on one side of the leaf piece (4) by a mounting bolt. The clamping and fixing block (15) and the leaf piece (4) cooperate to form clamping grooves (16) on both sides of the leaf piece (4).

7. A concealed hinge with an oil injection hole according to claim 6, characterized in that, The sheet portion (4) is provided with a limiting groove (17) on the side facing the clamping and fixing block (15), and the clamping and fixing block (15) is provided with a limiting protrusion (19) that matches the limiting groove (17) on the side facing the sheet portion (4).

8. A concealed hinge with an oil injection hole according to claim 7, characterized in that, The sheet portion (4) is provided with a first positioning groove (20) at the central axis of the corresponding limiting groove (17), and the limiting protrusion (19) is provided with a second positioning groove (18) on the central axis.

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