Vehicle door hinge

Abstract

The utility model relates to a vehicle door hinge, which comprises a rotating shaft, the rotating shaft is of a three-section structure and comprises a wear-resisting section in the middle and supporting sections at the two ends, and the diameter of the wear-resisting section is larger than that of the supporting sections; the shaft sleeve is in running fit with the rotating shaft, and a gap is formed between the supporting section and the inner wall of the shaft sleeve in an installation state. Through the variable-diameter design of the rotating shaft, the diameter width of the wear-resisting section area is larger than that of the supporting sections at the two ends, so that the wear of the rotating shaft is mainly concentrated in the wear-resisting section area when the rotating shaft is used, the uniform wear of the whole rotating shaft is avoided, and the service life of the rotating shaft is prolonged; and the parts, which are relatively difficult to wear, at the two ends can always keep better structural strength and matching precision, so that the rotating stability of the hinge is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hinge technical field, and particularly relates to a vehicle door hinge. BACKGROUND

[0002] In the existing hinge structure, the shaft and the shaft sleeve are prone to wear due to frequent relative rotation during long-term use. After wear, the gap between the two increases, which causes loosening, affects the normal use of the hinge, reduces the stability and reliability of the equipment, and increases the maintenance cost and replacement frequency. SUMMARY

[0003] The utility model provides a vehicle door hinge in view of prior art's problem, and the specific technical scheme is as follows:

[0004] A vehicle door hinge, comprising:

[0005] A shaft, the shaft is a three-section structure, comprising a wear-resistant section in the middle and a support section at both ends, the diameter of the wear-resistant section is greater than the diameter of the support section;

[0006] And a shaft sleeve matched with the shaft gap, in the installed state, there is a gap between the support section and the inner wall of the shaft sleeve.

[0007] As a further technical scheme of the utility model, a plurality of annular grooves are uniformly arranged in the shaft sleeve along the axial direction, and an elastic wear-resistant ring is installed in the annular groove, and in the installed state, the elastic wear-resistant ring is tightly attached to the shaft.

[0008] As a further technical scheme of the utility model, an oil channel is formed in the inner wall of the shaft sleeve, the oil channel extends from one end of the shaft sleeve to the other end in a spiral manner, and the oil channel is filled with a solid lubricating material.

[0009] As a further technical scheme of the utility model, the wear-resistant section and the two support sections are connected by splines, the two ends of the wear-resistant section are provided with external splines, and the corresponding positions of the two support sections are provided with internal splines.

[0010] As a further technical scheme of the utility model, the shaft sleeve is a three-section structure matched with the shaft, comprising a bearing section in the middle and a connecting section at both ends, the bearing section is matched with the wear-resistant section, and the inner diameter of the connecting section is greater than the inner diameter of the bearing section.

[0011] As a further technical scheme of the utility model, the bearing section and the two connecting sections are connected by threads, the two ends of the bearing section are provided with external threads, and the connecting section is provided with internal threads matched with the external threads.

[0012] The utility model has the beneficial effects as follows:

[0013] (1) In the present application, the diameter of the rotating shaft is changed, so that the diameter of the wear-resistant section is larger than that of the supporting sections at both ends. As a result, the wear of the rotating shaft mainly occurs in the wear-resistant section during use, avoiding uniform wear of the entire rotating shaft and prolonging the service life of the rotating shaft. At the same time, the relatively non-wearable parts at both ends can always maintain good structural strength and fitting accuracy, ensuring the stability of the hinge rotation.

[0014] (2) In the present application, the rotating shaft and the shaft sleeve are both provided in a detachable three-section structure, so that the wear area can be replaced individually, which is conducive to reducing maintenance costs.

[0015] (3) In the present application, an elastic wear-resistant ring is arranged between the rotating shaft and the shaft sleeve, which can play a buffering role, reduce the direct friction between the rotating shaft and the shaft sleeve, and maintain the close fit between the two when wear occurs by using elastic compensation gap, further prolonging the service life of the hinge.

[0016] (4) In the present application, an oil channel communicating with the rotating shaft is formed in the inner wall of the shaft sleeve, and a solid lubricating material is filled in the oil channel. When the rotating shaft and the shaft sleeve rotate relative to each other, the solid lubricating material is gradually released by heating or extrusion, and is uniformly distributed on the contact surface of the rotating shaft and the shaft sleeve through the oil channel, achieving automatic lubrication, effectively reducing wear, reducing the friction coefficient, and improving the rotation flexibility of the hinge. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 An overall structure schematic diagram of a vehicle door hinge is shown;

[0018] Figure 2 A structure schematic diagram of a rotating shaft is shown;

[0019] Figure 3 A structure schematic diagram of external and internal splines is shown;

[0020] Figure 4 A structure schematic diagram of a shaft sleeve is shown;

[0021] Figure 5 A structure schematic diagram of external and internal threads is shown.

[0022] LEGEND:

[0023] 100, rotating shaft; 110, wear-resistant section; 111, external spline; 120, supporting section; 121, internal spline; 200, shaft sleeve; 210, bearing section; 211, external thread; 220, connecting section; 221, internal thread; 230, annular groove; 240, elastic wear-resistant ring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the utility model technical scheme will be described clearly and completely in combination with embodiments.

[0025] Figure 1 The overall structure of a vehicle door hinge is shown; Figure 1 In the utility model, the vehicle door hinge comprises a rotating shaft 100 and a shaft sleeve 200 in clearance fit with the rotating shaft 100; that is to say, the rotating shaft 100 can be installed on a vehicle frame, the shaft sleeve 200 is installed on a vehicle door, and the shaft sleeve 200 is driven to rotate around the rotating shaft 100; or the shaft sleeve 200 can be installed on the vehicle frame, the rotating shaft 100 is installed on the vehicle door, and the vehicle door is driven to rotate the rotating shaft 100 in the shaft sleeve 200, and the specific installation mode is not limited.

[0026] Figure 2 The structure of the rotating shaft 100 is shown; the rotating shaft 100 is a three-section structure comprising a middle wear-resistant section 110 and two end support sections 120; the two end support sections 120 are connected at the two ends of the wear-resistant section 110 and form an overall shaft structure; the diameter of the wear-resistant section 110 is greater than that of the support section 120; that is to say, in the whole rotating shaft 100, the middle wear-resistant section 110 part protrudes radially outward, so that the wear of the rotating shaft 100 in use is mainly concentrated in the area of the wear-resistant section 110, the uniform wear of the whole rotating shaft 100 is avoided, the service life of the rotating shaft 100 is prolonged, at the same time, the two end parts which are not easy to wear can always maintain good structural strength and matching precision, and the stability of the hinge rotation is ensured; in actual use, the thickness of the radially outward protruding wear-resistant section 110 is between 0.5-2mm, so as to avoid too large radial difference.

[0027] Figure 3 The structure of the external spline 111 and the internal spline 121 is shown; Figure 3 In the utility model, the wear-resistant section 110 and the two support sections 120 are connected by splines, the two ends of the wear-resistant section 110 are provided with external splines 111, and the corresponding positions of the two support sections 120 are provided with internal splines 121; the cross-sectional area of the external spline 111 decreases when extending axially; that is to say, the end of the external spline 111 away from the wear-resistant section 110 is smaller than the end connected to the wear-resistant section 110, forming a positioning structure of far narrow and near wide, which is beneficial to the butt joint of the external spline 111 and the internal spline 121; the splines are used to ensure stable torque transmission and reduce additional wear caused by different shafts.

[0028] Figure 4 The structure of the shaft sleeve 200 is shown; Figure 4In the embodiment, the shaft sleeve 200 is a three-section structure matched with the rotating shaft 100, including a middle bearing section 210 and two end connecting sections 220; the two end connecting sections 220 are distributed at the two ends of the wear-resistant section 110, and the three sections form a shaft-like structure; the bearing section 210 is matched with the wear-resistant section 110, and there is a gap between the inner walls of the support section 120 and the connecting section 220; that is, since the wear-resistant section 110 of the rotating shaft 100 is outwardly convex, when the rotating shaft 100 and the shaft sleeve 200 are installed, the contact parts of the rotating shaft 100 and the shaft sleeve 200 are concentrated at the positions of the bearing section 210 and the wear-resistant section 110, so that the wear is concentrated in a certain section area; the inner diameter of the connecting section 220 is greater than that of the bearing section 210; the gap degree between the connecting section 220 and the support section 120 is further ensured, and the overall rotating shaft 100 is facilitated to be installed into the shaft sleeve 200; a plurality of annular grooves 230 are uniformly arranged in the shaft sleeve 200 in the axial direction, and an elastic wear-resistant ring 240 is installed in the annular groove 230, and in the installed state, the elastic wear-resistant ring 240 is tightly attached to the rotating shaft 100; the elastic wear-resistant ring 240 arranged between the rotating shaft 100 and the shaft sleeve 200 can compensate and play a buffering role, reduce the direct friction between the rotating shaft 100 and the shaft sleeve 200, and when wear occurs, the elastic compensation gap is utilized to maintain the close fit between the two, thereby further prolonging the service life of the hinge; an oil channel (not shown in the figure) is formed in the inner wall of the shaft sleeve 200, the oil channel extends from one end of the shaft sleeve 200 to the other end in a spiral manner, and the oil channel is filled with a solid lubricating material; when the rotating shaft 100 and the shaft sleeve 200 rotate relative to each other, the solid lubricating material is gradually released by heating or extrusion, and is uniformly distributed on the contact surface of the rotating shaft 100 and the shaft sleeve 200 through the oil channel, thereby realizing automatic lubrication, effectively reducing wear, reducing the friction coefficient, and improving the rotating flexibility of the hinge; for example, the solid lubricating material can be molybdenum disulfide.

[0029] Figure 5 The structure diagrams of the external thread 211 and the internal thread 221 are shown; the bearing section 210 and the two connecting sections 220 are connected by threads, the two ends of the bearing section 210 are provided with protruding external threads 211, and the connecting sections 220 are provided with internal threads 221 matched with the external threads 211; the relative rotation of the bearing section 210 and the connecting sections 220 can realize connection and separation through the external threads 211 and the internal threads 221, which is beneficial to separately replace the wear part of the bearing section 210.

[0030] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them.

Claims

1. A vehicle door hinge, characterized in that, The utility model relates to a kind of rotary shaft and shaft sleeve, including: Rotary shaft (100), the rotary shaft (100) is three-section structure, including middle wear-resistant section (110) and two ends support section (120), the diameter of the wear-resistant section (110) is greater than the diameter of the support section (120); And the shaft sleeve (200) is matched with the rotary shaft (100) gap, in the installation state, the support section (120) and the gap between the inner wall of the shaft sleeve (200).

2. A door hinge according to claim 1, characterized in that: The shaft sleeve (200) is uniformly arranged with multiple annular grooves (230) in the axial direction, and the elastic wear-resistant ring (240) is installed in the annular groove (230), and in the installation state, the elastic wear-resistant ring (240) is tightly attached to the rotary shaft (100).

3. A vehicle door hinge according to claim 2, wherein: The inner wall of the shaft sleeve (200) is provided with an oil channel, the oil channel is spirally wrapped from one end of the shaft sleeve (200) to the other end, and the oil channel is filled with solid lubricating material.

4. A vehicle door hinge according to claim 3, wherein: The wear-resistant section (110) and two support sections (120) are connected by spline, and the two ends of the wear-resistant section (110) are provided with external spline (111), and the corresponding positions of two support sections (120) are provided with internal spline (121).

5. A vehicle door hinge according to claim 4, wherein: The shaft sleeve (200) is matched with the three-section structure of rotary shaft (100), including middle bearing section (210) and two ends connection section (220), the bearing section (210) is matched with the wear-resistant section (110), and the inner diameter of the connection section (220) is greater than the inner diameter of the bearing section (210).

6. A door hinge according to claim 5, wherein: The bearing section (210) and two connection sections (220) are connected by thread, and the two ends of the bearing section (210) are provided with convex external thread (211), and the connection section (220) is provided with internal thread (221) matched with external thread (211).

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