Hinge of folding box and folding box

Abstract

The utility model discloses a hinge of a folding box and the folding box. The hinge of the folding box comprises a fixed hinge, a movable hinge and a hinge shaft, the fixed hinge comprises two opposite side walls, a shaft hole is formed in the movable hinge, the hinge shaft is connected in the shaft hole in a penetrating mode, and the two ends of the hinge shaft are connected to the two side walls of the fixed hinge respectively. The hinge shaft is sleeved with a bush, the bush is arranged in the shaft hole, a groove extending in the circumferential direction of the bush is formed in the outer circumferential face of the bush, and an oil hole extending to the inner surface of the bush is formed in the bottom face of the groove; an oil injection hole is formed in the movable hinge, one end of the oil injection hole extends to the outer surface of the movable hinge, the other end of the oil injection hole extends to the inner wall face of the shaft hole and is right opposite to the groove, and the projection of an opening, formed in the inner wall face of the shaft hole, of the oil injection hole on the outer circumferential face of the bush falls between the two side edges of the groove. According to the utility model, a better lubricating effect can be provided for the hinge shaft, and the service life of the hinge is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of containers, in particular to a hinge of a folding box and the folding box. Background Art

[0002] A foldable box is a special container, which generally includes a base frame for loading goods and two end frames respectively installed at both ends of the base frame. The end frames are connected to the base frame by hinges so that the end frames can be flipped relative to the base frame. When loading goods, the end frames are flipped to a vertical state. When returning empty boxes, the end frames are flipped to a state folded above the base frame, so that multiple foldable boxes can be stacked and stacked, reducing the space occupied by the foldable boxes when returning empty boxes, and multiple empty boxes can be transported with one hoisting, reducing the number of hoisting times.

[0003] The hinge of a folding box generally includes a fixed hinge fixed at the end corner of the base frame, a movable hinge connected to the end frame, and a hinge shaft that crosses the fixed hinge and the movable hinge to rotatably connect the two together. In order to ensure that the movable hinge can rotate flexibly and prevent the movable hinge and the hinge shaft from wearing, it is usually necessary to provide a bushing between the axial hole of the movable hinge and the hinge shaft, and inject lubricating oil into the gap between the bushing and the movable hinge through the oil filling hole on the movable hinge. However, after the hinge of the folding box has been used for a certain period of time, the axial position and circumferential position of the bushing relative to the movable hinge will change, causing the oil filling hole on the movable hinge and the oil hole on the bushing to be misaligned, and the lubricating oil cannot be normally injected into the gap between the bushing and the hinge shaft, resulting in excessive wear between the bushing and the hinge shaft due to lack of lubricating oil. Utility Model Content

[0004] In view of the deficiencies in the prior art, the first object of the present invention is to provide a hinge for a folding box, which can provide a better lubrication effect for the hinge shaft and extend the service life of the hinge.

[0005] The second purpose of the utility model is to provide a folding box.

[0006] In order to achieve the above purpose one, the utility model adopts the following technical solution:

[0007] Hinges of folding boxes, including fixed hinges, movable hinges and hinge shafts;

[0008] The fixed hinge includes two opposite side walls, and the movable hinge is provided with an axis hole, the hinge axis is inserted into the axis hole and its two ends are respectively connected to the two side walls of the fixed hinge;

[0009] A bushing is sleeved on the hinge shaft and placed in the shaft hole. A groove extending along its circumference is provided on the outer circumferential surface of the bushing, and an oil hole extending to the inner surface of the bushing is provided on the bottom surface of the groove; an oil filling hole is provided on the movable hinge, one end of the oil filling hole extends to the outer surface of the movable hinge, and the other end extends to the inner wall surface of the shaft hole and is arranged opposite to the groove, and the opening formed by the oil filling hole on the inner wall surface of the shaft hole is projected on the outer circumferential surface of the bushing and falls between the two side edges of the groove.

[0010] The width of the groove is w, the diameter of the opening formed by the oil filling hole on the inner wall of the shaft hole is R, and the ratio of W to R is 1.3~1.8.

[0011] The depth of the groove is 0.5~1.5mm.

[0012] The inner surfaces of the two side walls of the fixed hinge are fixedly connected with a set of rings, the hinge shaft passes through the two rings, and the bushing and the movable hinge are limited between the two rings.

[0013] A mounting hole is provided on both side walls of the fixed hinge, and a step surface is provided on the outer circumferential surface of the two rings. The parts of the two rings located outside the step surface are respectively embedded in the mounting holes, and the step surfaces on the two rings are respectively abutted against the inner surfaces of the two side walls and welded and fixed to the inner surfaces of the two side walls.

[0014] A first annular groove is arranged on the inner surface of the collar, a second annular groove is arranged on the outer peripheral surface of the hinge shaft, the second annular groove and the first annular groove are arranged opposite to each other and together form an oil groove, and the collar is provided with an oil inlet extending from its outer surface to the first annular groove to communicate with the oil groove.

[0015] An annular groove is arranged on the outer peripheral surface of the hinge shaft, and the annular groove is arranged directly opposite to the oil hole.

[0016] In order to achieve the above-mentioned second purpose, the utility model adopts the following technical solutions:

[0017] A folding box comprises the hinge of the folding box.

[0018] The beneficial effects of the utility model are:

[0019] The utility model provides a groove extending along the circumferential direction on the outer circumferential surface of the bushing, so that the oil filling hole is aligned with the groove, and the width of the groove is greater than the width of the oil filling hole, and an oil hole extending to the inner surface of the bushing is provided on the bottom surface of the groove. The lubricating oil can be injected into the groove through the oil filling hole, and then enter the gap between the bushing and the hinge shaft through the groove and the oil hole. Even if the bushing is offset in the axial and circumferential directions relative to the movable hinge, it can ensure that the lubricating oil enters the gap between the bushing and the hinge shaft through the oil filling hole, the groove and the oil hole, thereby providing a better lubrication effect for the hinge shaft and extending the service life of the hinge. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 for Figure 2 Magnified view at A in the middle;

[0023] Figure 4 for Figure 2 Magnified view at B. DETAILED DESCRIPTION

[0024] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0025] like Figure 1 , 2 , 3, and 4 show a hinge of a folding box of the utility model, which includes a fixed hinge 10, a movable hinge 20, and a hinge shaft 30. The fixed hinge 10 includes two opposite side walls 11. An axis hole 21 is provided on the movable hinge 20. The movable hinge 20 is located between the two side walls of the fixed hinge 10. The hinge shaft 30 crosses the axis hole 21 of the movable hinge 20, and the two ends of the hinge shaft 30 are respectively connected to the two side walls 11 of the fixed hinge 10; a bushing 40 is provided on the hinge shaft 30, and the bushing 40 is placed in the axis hole 21. A groove 41 extending along the circumference of the bushing 40 is provided on the outer peripheral surface of the bushing 40. The groove 41 An oil hole 42 extending to the inner surface of the bushing 40 is provided on the bottom surface; an oil filling hole 22 is provided on the movable hinge 20, one end of the oil filling hole 22 extends to the outer surface of the movable hinge 20, and the other end extends to the inner wall surface of the shaft hole 21, and the oil filling hole 22 forms an opening on the inner wall surface of the shaft hole 21, the oil filling hole 22 is arranged opposite to the groove 41, and the projection of the opening of the oil filling hole 22 on the outer peripheral surface of the bushing 40 falls between the two side edges of the groove 41, that is, the width of the groove 41 is greater than the diameter of the opening of the oil filling hole 22, so that in the axial direction of the hinge shaft 30, the opening of the oil filling hole 22 does not exceed the two side edges of the groove 41.

[0026] In the utility model, a groove 41 extending along the circumferential direction is provided on the outer circumferential surface of the bushing 40, so that the oil filling hole 22 is aligned with the groove 41, and the width of the groove 41 is greater than the width of the oil filling hole 41, and an oil hole 42 extending to the inner surface of the bushing 40 is provided on the bottom surface of the groove 41. The lubricating oil can be injected into the groove 41 through the oil filling hole 22, and then enter the gap between the bushing 40 and the hinge shaft 30 through the groove 41 and the oil hole 42. Even if the bushing 40 is offset relative to the movable hinge 20 in the axial and circumferential directions, it can ensure that the lubricating oil enters the gap between the bushing 40 and the hinge shaft 30 through the oil filling hole 22, the groove 41 and the oil hole 42, thereby providing a better lubrication effect for the hinge shaft and extending the service life of the hinge.

[0027] In a preferred embodiment, the width of the groove 41 is W, and the diameter of the opening formed by the oil injection hole 22 on the inner wall of the shaft hole 21 is R, wherein the ratio of W to R is in the range of 1.3 to 1.8, for example, the difference between W and R is set in the range of 2 to 4 mm, preferably, the diameter of the oil injection hole 22 is set to 5 mm, and the oil injection hole 22 is a cylindrical structure, so that the opening diameter R formed by the oil injection hole 22 on the inner wall of the shaft hole 21 is 5 mm. The depth of the above-mentioned groove 41 is set in the range of 0.5 to 1.5 mm.

[0028] A collar 12 is fixed on the inner surface 113 of the two side walls 11 of the fixed hinge 10, respectively. The hinge shaft 30 is inserted into the two collars 12, and the bushing 40 and the movable hinge 20 are limited between the two collars 12. By providing the two collars 12, the size of the fixed hinge 10 and the hinge shaft 30 is increased, so that the hinge shaft 30 is more stably connected to the fixed hinge 10, and the bushing 40 is limited by the two collars 12 to prevent the bushing 40 from moving too much in the axial direction of the hinge shaft 30 and to prevent the opening of the oil filling hole 22 from exceeding the two side edges of the groove 41. In addition, the two sleeves 12 limit the movable hinge 20 to prevent the movable hinge 20 from swinging too much when rotating relative to the fixed hinge 10. A mounting hole 111 is provided on both side walls 11 of the fixed hinge 10, and a step surface 122 is provided on the outer circumference of both collars 12. The parts of the two collars 12 located outside the step surface 122 are respectively embedded in the two mounting holes 111. The step surfaces 122 on the two collars 12 are respectively abutted against the inner surfaces 113 of the two side walls 11. The step surfaces 122 are welded to the inner surfaces of the side walls 11 to fix the collars 12 on the side walls 11. A first annular groove 123 is provided on the inner surface of the collar 12, and a second annular groove 32 is provided on the outer circumference of the hinge shaft 30. The second annular groove 32 and the first annular groove 123 are arranged opposite to each other and together form an oil groove. An oil inlet 121 is provided on the collar 12, and one end of the oil inlet 121 extends to the outer surface of the collar 12, and the other end extends to the first annular groove 123 to communicate with the oil groove.

[0029] In another preferred embodiment, an annular groove 31 is provided on the outer peripheral surface of the hinge shaft 30, and the annular groove 31 is arranged opposite to the oil hole 42 of the bushing 40. When the lubricating oil enters the gap between the bushing 40 and the hinge shaft 30 through the oil hole 42, part of the lubricating oil can be filled into the annular groove 31. Therefore, when the lubricating oil between the bushing 40 and the hinge shaft 30 is insufficient, the lubricating oil in the annular groove 31 can diffuse to both sides to supplement the lubricating oil in the gap between the bushing 40 and the hinge shaft 30.

[0030] The folding box of the utility model comprises the hinge of the folding box mentioned above, and other structures of the folding box are the same as those in the prior art, which will not be described in detail here.

[0031] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A hinge for a folding box, characterized in that: Including fixed hinges, movable hinges and hinge shafts; The fixed hinge includes two opposite side walls, and the movable hinge is provided with an axis hole, the hinge axis is inserted into the axis hole and its two ends are respectively connected to the two side walls of the fixed hinge; A bushing is sleeved on the hinge shaft and placed in the shaft hole. A groove extending along its circumference is provided on the outer circumferential surface of the bushing, and an oil hole extending to the inner surface of the bushing is provided on the bottom surface of the groove; an oil filling hole is provided on the movable hinge, one end of the oil filling hole extends to the outer surface of the movable hinge, and the other end extends to the inner wall surface of the shaft hole and is arranged opposite to the groove, and the opening formed by the oil filling hole on the inner wall surface of the shaft hole is projected on the outer circumferential surface of the bushing and falls between the two side edges of the groove.

2. The hinge of the folding box according to claim 1, characterized in that: The width of the groove is w, the diameter of the opening formed by the oil filling hole on the inner wall of the shaft hole is R, and the ratio of W to R is 1.3~1.

8.

3. The hinge of the folding box according to claim 2, characterized in that: The depth of the groove is 0.5~1.5mm.

4. The hinge of the folding box according to claim 1, characterized in that: The inner surfaces of the two side walls of the fixed hinge are fixedly connected with a set of rings, the hinge shaft passes through the two rings, and the bushing and the movable hinge are limited between the two rings.

5. The hinge of the folding box according to claim 4, characterized in that: A mounting hole is provided on both side walls of the fixed hinge, and a step surface is provided on the outer circumferential surface of the two rings. The parts of the two rings located outside the step surface are respectively embedded in the mounting holes, and the step surfaces on the two rings are respectively abutted against the inner surfaces of the two side walls and welded and fixed to the inner surfaces of the two side walls.

6. The hinge of the folding box according to claim 5, characterized in that: A first annular groove is arranged on the inner surface of the collar, a second annular groove is arranged on the outer peripheral surface of the hinge shaft, the second annular groove and the first annular groove are arranged opposite to each other and together form an oil groove, and the collar is provided with an oil inlet extending from its outer surface to the first annular groove to communicate with the oil groove.

7. The hinge of the folding box according to claim 1, characterized in that: An annular groove is arranged on the outer peripheral surface of the hinge shaft, and the annular groove is arranged directly opposite to the oil hole.

8. A folding box, characterized in that: A hinge for a folding box comprising any one of claims 1-7.

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