Forged vehicle door hinge with limiting function

Abstract

The invention discloses a forged vehicle door hinge with a limiting function. The forged vehicle door hinge is characterized in that a support through hole for mounting a hinge shaft and a support mounting hole for mounting a side wall metal plate are formed in a support; a hinge bushing is arranged in the support through hole, and one end of the hinge shaft is inserted into the hinge bushing and is connected with the second fastening bolt; one end of the hinge rotating arm is sleeved outside the other end of the hinge shaft, one end of the first fastening bolt penetrates through the hinge rotating arm and is fixed with an internal thread of the hinge shaft, and the hinge rotating arm and the hinge shaft are fixed so that the hinge rotating arm can drive the hinge shaft to rotate together; and the bottom of the support and the hinge rotating arm respectively form a limiting bulge and a hinge limiting point which are matched with each other so as to limit the opening degree of the vehicle door. The vehicle door hinge is manufactured through the forging technology, the structure is novel, the risks of corner hanging and fatigue failure of a vehicle door can be avoided, the passing ability is improved, collision with a column A is avoided, the automatic falling tendency of the vehicle door is achieved, and the problem that a driver and passengers are strenuous to close the door is solved.

Description

Technical Field

[0001] The invention relates to the technical field of commercial vehicle door hinges, in particular to a forged door hinge with a limiting function. Background Art

[0002] In recent years, due to the small opening, high failure rate, door hanging angle and inability to automatically fall back of traditional stamped door hinges, light truck users have complained and the market has a high rate of complaints. With the trend of younger users and fierce market competition, it is urgent to solve the problems of comfort, convenience and quality control of light truck doors.

[0003] Refer to the attached Figure 1 The stamped door hinge of the light truck can only open up to 63°, which greatly affects the door opening and cannot solve the problems of door hanging angle and failure to automatically fall back. Due to the poor strength and durability of the stamped door hinge, defects such as door hanging angle or hinge cracking may also occur. Summary of the invention

[0004] The purpose of the present invention is to provide a forged door hinge with a limit function, which is used to solve the problems of small opening, high failure rate, easy door hanging angle, no limit, and inability to automatically fall back of traditional light truck door hinges.

[0005] The present invention solves the above problems through the following technical solutions:

[0006] A forged door hinge with a limiting function, comprising: a first fastening bolt, a hinge arm, a hinge shaft, a hinge bushing, a support and a second fastening bolt;

[0007] The support is formed of a support lug and a support bottom in an inverted "T" shape, the support lug is formed with a support through hole for installing the hinge shaft, and the support bottom is formed with a support mounting hole for mounting with the side panel metal close to the door panel metal;

[0008] A "convex" shaped hinge bushing is respectively arranged on the left and right sides of the support through hole, and the hinge bushing is relatively inserted on the left and right sides of the support through hole; one end of the hinge shaft is inserted in the hinge bushing and connected with the second fastening bolt to limit the hinge shaft and rotatably install it with the support;

[0009] One end of the hinge arm is sleeved outside the other end of the hinge shaft, one end of the first fastening bolt passes through the hinge arm and is fixed to the inner thread of the hinge shaft, and the hinge arm is fixed to the hinge shaft so that the hinge arm can drive the hinge shaft to rotate together; the other end of the hinge arm is bent upward to form a hinge arm mounting portion, so that the hinge arm mounting portion is mounted on the side wall of the inner panel of the vehicle door;

[0010] A limiting protrusion is formed on the bottom of the support, and a hinge limiting point is formed outside the hinge arm connected to the hinge shaft. The limiting protrusion cooperates with the hinge limiting point to limit the rotation angle of the door sheet metal, that is, the door opening, to 73°~75°.

[0011] As a further improvement, two hinge bushings located on the left and right sides of the support through hole offset each other.

[0012] As a further improvement, the second fastening bolt is fixed to the internal thread of the hinge shaft, and the outer end of the second fastening bolt abuts against the end of the hinge shaft and the hinge bushing located in the support through hole.

[0013] As a further improvement, the middle portion of the hinge shaft expands from the left side to the right side to form a limiting portion, and the limiting portion is close to one end of the second fastening bolt and abuts against the hinge bushing.

[0014] As a further improvement, the other end of the hinge arm forms the hinge arm mounting portion through a left and right inwardly concave arc transition, and the hinge arm mounting portion is provided with hinge arm mounting holes on the left and right sides for mounting the other end of the hinge arm.

[0015] As a further improvement, the upward curvature of the other end of the hinge arm needs to ensure that there is no collision with the fender when the door is opened to the maximum.

[0016] As a further improvement, two door hinges are arranged on the upper and lower sides of the front door sheet metal, and the axes of the inner through holes of the hinge arms of the upper and lower door hinges coincide to form a door rotation axis, and the door rotation axis is offset by 0.8° to 1° toward the interior of the vehicle from the vertical Y-axis.

[0017] As a further improvement, the hinge arm and the support are made of 45# steel through a forging process of hammering, heat treatment and cooling forming.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0019] (1) The door hinge of the present invention is made by forging technology, and the hinge arm and the support are made by 45# steel forging technology, which has high strength and durability, avoiding the risk of door hanging angle and fatigue failure;

[0020] (2) The present invention has a novel structure, and the rotation angle of the door sheet metal is limited to 73° to 75° by cooperating with the limit protrusion and the hinge limit point, which can effectively improve the passability of drivers and passengers in getting on the vehicle and the convenience of taking and putting items in the vehicle, and can avoid the risk of excessive opening of the door and collision with the A-pillar.

[0021] (3) The hinge axis Y of the door of the present invention is inclined inward by 0.8°, so that the door can automatically fall back, thus solving the problem of difficulty in closing the door for the driver and passengers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of a stamping structure door hinge in the prior art;

[0023] Figure 2 It is a structural schematic diagram of a forged door hinge with a limiting function according to the present invention;

[0024] Figure 3 It is an explosion diagram of a forged door hinge with a limit function according to the present invention;

[0025] Figure 4 It is a cross-sectional schematic diagram of a forged door hinge with a limiting function according to the present invention;

[0026] Figure 5 It is a front view schematic diagram of the open and closed states of a forged door hinge with a limit function according to the present invention;

[0027] Figure 6 It is a side schematic diagram of the open and closed states of a forged door hinge with a limit function according to the present invention;

[0028] Figure 7 This is a schematic diagram of the installation of a forged door hinge with a limit function according to the present invention;

[0029] Figure 8 A schematic diagram of a forged door hinge with a limit function in an open state of a door according to the present invention;

[0030] Fig. 9 The present invention is a schematic diagram of a door rotation axis after a forged door hinge with a limiting function is installed.

[0031] Reference numerals:

[0032] 1. First fastening bolt; 2. Hinge arm; 21. Hinge arm mounting portion; 22. Hinge arm mounting hole; 23. Hinge limit point; 3. Hinge shaft; 31. Limit portion; 4. Hinge bushing; 5. Support; 51. Support lug; 52. Support bottom; 53. Support through hole; 54. Support mounting hole; 6. Second fastening bolt; 7. Door rotation axis; 8. Side panel sheet metal; 9. Door sheet metal. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below in conjunction with the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference numerals throughout represent the same or similar parts or parts with the same or similar functions. The described embodiments are part of the embodiments of the present application, not all of the embodiments. The embodiments described below with reference to the drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0034] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are orientations or positional relationships based on the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or display that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed but may include other steps or elements not explicitly listed or inherent to such process, method, product, or display.

[0038] The following will be combined Figure 1-9 , a forged door hinge with a limit function involved in the embodiment of the present application is described in detail. It is worth noting that the following embodiments are only used to explain the present application and do not constitute a limitation on the present application.

[0039] Example

[0040] Combined with Figure 1-9As shown, a forged door hinge with a limiting function comprises: a first fastening bolt 1, a hinge arm 2, a hinge shaft 3, a hinge bushing 4, a support 5 and a second fastening bolt 6; the support 5 is formed with a support through hole 53 for installing the hinge shaft 3, and a support mounting hole 54 for mounting the side panel 8 close to the door panel; a hinge bushing 4 is arranged in the support through hole 53, and the hinge bushing 4 is relatively inserted on the left and right of the support through hole 53; one end of the hinge shaft 3 is inserted in the hinge bushing 4 and is connected with the second fastening bolt 6 to limit the hinge shaft 3 The hinge arm 2 is rotatably mounted on the support; one end of the hinge arm 2 is sleeved outside the other end of the hinge shaft 3, one end of the first fastening bolt 1 passes through the hinge arm 2 and is fixed to the internal thread of the hinge shaft 3, and the hinge arm 2 is fixed to the hinge shaft 3 so that the hinge arm can drive the hinge shaft 3 to rotate together; the other end of the hinge arm 2 is bent upward to form a hinge arm mounting portion 21, so that the hinge arm mounting portion 21 is installed on the side wall of the inner panel of the door; preferably, the arc of the other end of the hinge arm bending upward needs to ensure that when the door opening is maximum, it does not collide with the fender. A limiting protrusion is formed on the bottom 52 of the support, and a hinge limiting point 23 is formed outside the hinge arm 2 and the hinge shaft 3. The limiting protrusion cooperates with the hinge limiting point 23 to limit the rotation angle of the door sheet metal, that is, the door opening to 73°~75°.

[0041] Specifically, in this embodiment, the door hinge is composed of a first fastening bolt 1, a hinge arm 2, a hinge shaft 3, a hinge bushing 4, a support 5, and a second fastening bolt 6. The support 5 is integrally formed in an inverted "T" shape, and the support lug 51 extending upward is formed with a support through hole 53. The support through hole is axially parallel to the support bottom 52, and support mounting holes 54 are formed on the left and right sides of the support bottom, so that the support is installed on the side of the side panel 8 close to the door sheet metal 9 by passing one end of the bolt through the support mounting hole 54; in this embodiment, hinge bushings 4 are respectively provided on the left and right sides of the support through hole 53. The hinge bushings 4 are "convex" and are relatively inserted on the left and right sides of the support through hole 53. Preferably, the two hinge bushings 4 are abutted against each other. The hinge shaft 3 is inserted on the left side of the support through hole 53, and the second fastening bolt 6 located on the right side of the support 5 is fixed to the internal thread of the hinge shaft 3 through the support through hole 53, and the outer end of the second fastening bolt 6 abuts against the end of the hinge shaft 3 and the hinge bushing 4 located on the right side of the support through hole 53; the middle part of the hinge shaft 3 expands from the left side to the right side to form a limited portion 31, and the limited portion 31 is close to one end of the second fastening bolt 6 and abuts against the hinge bushing 4 on the left side of the support through hole 53. The hinge arm 2 is sleeved on the left end of the hinge shaft 3, and one end of the first fastening bolt 1 passes through the left end of the hinge arm 2 and is fixed to the internal thread of the left end of the hinge shaft 3, so as to install the support 5 and the hinge arm 2 through the hinge shaft 3. The hinge arm 2 transitions inwardly into a concave arc to form a hinge arm mounting portion 21, and hinge arm mounting holes 22 are formed on the left and right sides of the hinge arm mounting portion 21. The hinge arm mounting portion 21 is mounted on the side wall of the inner door panel by passing one end of a bolt through the hinge arm mounting hole 22.

[0042] Preferably, the left portion of the bottom 52 of the support is thickened and formed with a limiting protrusion, and a hinge limiting point 23 is formed outside the hinge arm 2 connected to the hinge shaft 3. The limiting protrusion cooperates with the hinge limiting point 23 to limit the rotation angle of the door sheet metal to avoid excessive opening of the door and the risk of collision with the A-pillar.

[0043] During the process of opening the door sheet metal 9 from a closed state, the hinge arm 2, the hinge shaft 3, the first fastening bolt 1, the second fastening bolt 6 and the door sheet metal 9 rotate integrally along the door rotation axis, that is, the axial direction of the support through hole 53; when the door sheet metal is opened from a closed state to a 74° state along the door rotation axis, the hinge limit point 23 of the hinge arm 2 contacts the limit protrusion of the support 5 to achieve the door opening limit; that is, it can avoid excessive opening of the door and ensure that the opening angle reaches 73°~75°, preferably 74°, which can effectively improve the passability of drivers and passengers in the vehicle and the convenience of taking and putting items in the vehicle.

[0044] Furthermore, two door hinges are arranged on the upper and lower sides of the front side of the door sheet metal, and the axes of the inner through holes of the hinge arms of the upper and lower door hinges coincide to form the door rotation axis 7, and the door rotation axis 7 is offset from the vertical Y axis by 0.8° to 1° toward the inside of the vehicle, so that the rotation plane of the door will be slightly tilted toward the inside of the vehicle body. When the door is opened, the center of gravity of the door will gradually deviate from the rotation axis as the opening increases, generating a moment driven by gravity. This moment can push the door to move in the closing direction, achieving the "automatic falling back" effect, so as to realize the automatic falling back trend of the door and solve the problem of the driver and passengers having difficulty closing the door.

[0045] In an optional embodiment, the hinge formed by simple pressing with a stamping or hydraulic press has relatively low strength and durability, and is only suitable for bearing light loads or small torques. It is prone to fatigue cracks or deformation after long-term use. The hinge arm 2 and the support 5 of the door hinge are made of 45# steel through multiple hammering shaping, multiple heat treatments and cooling forming and other forging processes. They have high strength and durability, can withstand large torques and weights, have high stability, long life, high reliability, and can withstand high-frequency loads of repeated opening and closing, solving the risk of hanging corners and fatigue failure of the door.

[0046] Although the present invention is described herein with reference to the illustrative embodiments of the present invention, the above embodiments are only preferred embodiments of the present invention, and the embodiments of the present invention are not limited to the above embodiments. It should be understood that those skilled in the art can design many other modifications and embodiments, which will fall within the scope and spirit of the principles disclosed in this application.

Claims

1. A forged door hinge with a limit function, characterized in that: include: A first fastening bolt, a hinge arm, a hinge shaft, a hinge bushing, a support, and a second fastening bolt; The support is formed of a support lug and a support bottom in an inverted "T" shape, the support lug is formed with a support through hole for installing the hinge shaft, and the support bottom is formed with a support mounting hole for mounting with the side panel metal close to the door panel metal; The left and right sides of the support through hole are respectively provided with "convex" hinge bushings, and the hinge bushings are relatively inserted in the left and right sides of the support through hole; one end of the hinge shaft is inserted in the hinge bushing and connected with the second fastening bolt to limit the hinge shaft and rotatably install it with the support; One end of the hinge arm is sleeved outside the other end of the hinge shaft, one end of the first fastening bolt passes through the hinge arm and is fixed to the inner thread of the hinge shaft, and the hinge arm is fixed to the hinge shaft so that the hinge arm can drive the hinge shaft to rotate together; the other end of the hinge arm is bent upward to form a hinge arm mounting portion, so that the hinge arm mounting portion is mounted on the side wall of the inner panel of the vehicle door; A limiting protrusion is formed on the bottom of the support, and a hinge limiting point is formed outside the hinge arm connected to the hinge shaft. The limiting protrusion cooperates with the hinge limiting point to limit the rotation angle of the door sheet metal, that is, the door opening, to 73°~75°.

2. A forged door hinge with a limit function according to claim 1, characterized in that: Two hinge bushings located on the left and right sides of the support through hole abut against each other.

3. A forged door hinge with a limit function according to claim 1, characterized in that: The second fastening bolt is fixed to the inner thread of the hinge shaft, and the outer end of the second fastening bolt abuts against the end of the hinge shaft and the hinge bushing located in the support through hole.

4. The forged door hinge with a limit function according to claim 1, characterized in that: The middle part of the hinge shaft expands from the left side to the right side to form a limiting portion, and the limiting portion is close to one end of the second fastening bolt and abuts against the hinge bushing.

5. The forged door hinge with a limit function according to claim 1, characterized in that: The other end of the hinge arm forms the hinge arm mounting portion through a left and right inwardly concave arc transition, and the hinge arm mounting portion is provided with hinge arm mounting holes for mounting the other end of the hinge arm.

6. The forged door hinge with a limit function according to claim 1, characterized in that: The upward curvature of the other end of the hinge arm needs to ensure that there is no collision with the fender when the door is opened to the maximum.

7. A forged door hinge with a limiting function according to any one of claims 1 to 6, characterized in that: Two door hinges are arranged on the upper and lower sides of the front side of the door sheet metal, and the axes of the inner through holes of the hinge arms of the upper and lower door hinges coincide to form a door rotation axis, and the door rotation axis is offset by 0.8° to 1° toward the inside of the vehicle from the vertical Y-axis.

8. A forged door hinge with a limit function according to claim 7, characterized in that: The hinge arm and the support are made of 45# steel through a forging process of hammering, heat treatment and cooling.

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