A single hinge for an axle-driven vehicle door

Abstract

The present invention provides an axially driven single hinge for a vehicle door, comprising: a vehicle body bracket, the vehicle body bracket comprising a vehicle body connecting frame and a first hinge body, the first hinge body comprising an upper connecting plate and a lower connecting plate, the upper connecting plate and the lower connecting plate being fixedly connected by a column, the upper connecting plate and the lower connecting plate being respectively provided with a first hinge hole and a third hinge hole; a vehicle door bracket, the vehicle door bracket comprising a vehicle door connecting frame and a second hinge body, the second hinge body being provided with a second hinge hole; a pin shaft assembly, the pin shaft assembly comprising a hinge shaft, a bushing, and a gasket, the hinge shaft passing through the first hinge hole, the second hinge hole and the third hinge hole, the outer wall of the hinge shaft further comprising a knurled area, the knurled area and the second hinge hole being interference fit, and limit heads being further provided at both ends of the hinge shaft, the first hinge hole and the third hinge hole being respectively connected with bushings, the flanges of the bushings respectively contact the upper connecting plate and the lower connecting plate, and the gasket is connected between the flanges of the bushing and the limit head of the hinge shaft. This type of hinge structure can maintain strong rigidity and achieve a smaller amount of door sagging when only one hinge is used for the door.

Description

Technical Field

[0001] The present invention relates to the field of hinges, and in particular to an axially driven single hinge for a vehicle door. Background Art

[0002] The door hinge is subjected to a vertical stiffness test. The hinge is mounted on an equivalent solid model (30kg) and a downward force is gradually applied up to 500N.m at a distance of 1000mm from the hinge center. The vertical deformation of the door is simultaneously measured at this distance. After the force is unloaded, the vertical plastic deformation of the door is measured, which must meet the following requirements: a) the door sag is no more than 3mm (elastic + plastic); and b) the permanent deformation is no more than 0.5mm.

[0003] Traditional car doors require two door hinges. To prevent the door from sinking, the span between the upper and lower door hinges is recommended to be greater than 300mm. The larger the hinge span, the more constraints are imposed on the exterior shape of the door. Traditional doors have two hinges installed above and below. The force arm formed by the center of gravity and the two hinges is short, the axial force on the hinge is small, and the force on ordinary flange bushings is small. In traditional door hinges, the hinge shaft is fixed and will rotate.

[0004] Concept cars and exhibition vehicles, however, have exaggerated door profiles and limited hinge space, requiring only a single door hinge. Conventional hinges and bushings used in double-hinged doors no longer meet the required strength. This is because the moment arm between the center of gravity and the hinge is long, resulting in high axial forces on the hinge. The bushing flange cannot bear the entire door's weight. Furthermore, compression of the bushing flange reduces the material thickness, causing the hinge to move and exacerbate door subsidence. Using a metal washer instead would increase the door hinge torque, failing to meet the required torque.

[0005] In addition, traditional forged and steel hinges have thickness tolerances in the hinge bracket and bushing in the axial direction. After the hinge is assembled, there will be a gap in the axial direction of the hinge bracket. When the hinge is subjected to force, the door bracket will move axially. Data simulation analysis shows that the door bracket moves 0.19mm in the axial direction, and the sag is 3mm at a distance of 1000mm from the hinge axis. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the present invention provides a single hinge for an axially driven vehicle door. The single hinge has a simple structure and can maintain strong rigidity and achieve a smaller sagging of the vehicle door when only one hinge is used for the vehicle door.

[0007] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a single hinge for an axially driven vehicle door, comprising:

[0008] A vehicle body bracket, comprising a vehicle body connecting frame and a first hinged body, wherein the first hinged body comprises an upper connecting plate and a lower connecting plate, wherein the upper connecting plate and the lower connecting plate are fixedly connected via a column, and wherein a first hinge hole and a third hinge hole are respectively formed in the upper connecting plate and the lower connecting plate;

[0009] A door bracket, comprising a door connecting frame and a second hinged body, wherein the second hinged body is provided with a second hinged hole;

[0010] A pin shaft assembly, which includes a hinge shaft, a bushing, and a gasket. The hinge shaft passes through a first hinge hole, a second hinge hole, and a third hinge hole. The outer wall of the hinge shaft is also provided with a knurled area. The knurled area and the second hinge hole are interference fit. There are also limit heads at both ends of the hinge shaft. Bushings are respectively connected to the first hinge hole and the third hinge hole. The flanges of the bushings are respectively in contact with the upper connecting plate and the lower connecting plate. The gasket is connected between the flange of the bushing and the limit head of the hinge shaft.

[0011] Furthermore, a connecting hole is provided on the side surface of the second hinged body, and a fixing component for pressing the hinge shaft is connected to the connecting hole.

[0012] Furthermore, the fixing component is a fixing pin.

[0013] Furthermore, the upper region or the lower region of the hinge shaft also has a thickened wall, and the step ring at the end of the thickened wall matches the upper end or the lower end of the second hinge hole.

[0014] Furthermore, a groove for accommodating iron filings is provided on the hinge shaft.

[0015] Furthermore, the fixing pin is a threaded pin.

[0016] Furthermore, the height of the knurled area of ​​the hinge shaft is one fifth of the height of the inner wall of the second hinge hole.

[0017] Furthermore, when the thickened wall of the hinge shaft is in the upper area, an annular groove is provided on the hinge shaft, the pressing side of the fixing pin has an inclined surface, and the groove wall of the annular groove has a matching inclined surface corresponding to the inclined surface.

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

[0019] 1. The single hinge has a simple structure. By fixing the hinge shaft to the door bracket and changing the installation position of the bushing, it can maintain strong rigidity and achieve a small amount of door sag when matching a single-hinge door.

[0020] 2. Effectively solve the problem of insufficient rigidity of the bushing connected to the hinge, making the bushing's service life longer and preventing the door bracket from shaking;

[0021] 3. By connecting a fixing pin to the hinge shaft, the fixing pin can be prevented from shaking even if there is a slight gap in the area outside the knurled area of ​​the hinge shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a traditional door hinge;

[0023] Figure 2 It is the front view of the present invention;

[0024] Figure 3 A top view of the present invention;

[0025] Figure 4 This is a cross-sectional view of the present invention (the hinge shaft is assembled from bottom to top);

[0026] Figure 5 A cross-sectional view of another embodiment of the present invention (the hinge shaft is assembled from top to bottom);

[0027] Figure 6 For the present invention Figure 5 Enlarged view of the middle circle;

[0028] In the figure: 1. Door bracket; 2. Body bracket; 3. Hinge shaft; 4. Bushing; 5. Gasket; 6. Fixing pin; 7. Groove; 8. Knurled area; 9. Thickened wall; 10. Step ring; 11. Stopper; 12. Annular groove; 13. Matching bevel; 14. Pillar; 15. Upper connecting plate; 16. Lower connecting plate; 17. First hinge; 18. Second hinge; 19. Second hinge hole. DETAILED DESCRIPTION

[0029] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0030] like Figure 2-6 The single hinge of an axially driven vehicle door shown includes:

[0031] A vehicle body bracket 2, comprising a vehicle body connecting frame and a first hinged body 17, wherein the first hinged body 17 comprises an upper connecting plate 15 and a lower connecting plate 16, wherein the upper connecting plate 15 and the lower connecting plate 16 are fixedly connected via a column 14, and a first hinge hole and a third hinge hole are respectively formed in the upper connecting plate 15 and the lower connecting plate 16;

[0032] A door bracket 1, comprising a door connecting frame and a second hinged body 18, wherein the second hinged body 18 is provided with a second hinged hole 19;

[0033] A pin assembly, which includes a hinge shaft 3, a bushing 4, and a gasket 5. The hinge shaft 3 passes through the first hinge hole, the second hinge hole 19 and the third hinge hole. The outer wall of the hinge shaft 3 is also provided with a knurled area 8. The knurled area 8 and the second hinge hole 19 are interference fit. There are also limit heads 11 at both ends of the hinge shaft 3. The first hinge hole and the third hinge hole are respectively connected with bushings 4, and the bushings 4 are respectively in contact with the upper connecting plate and the lower connecting plate. The gasket 5 is connected between the flange of the bushing 4 and the limit head 11 of the hinge shaft 3.

[0034] During the specific assembly of the present invention, the bushings 4 are first connected to the first hinge hole and the third hinge hole respectively, and then the second hinge hole 19 on the second hinge body of the door bracket 1 is aligned with the first hinge hole, the second hinge hole and the third hinge hole of the upper connecting plate 15 and the lower connecting plate 16, and then the hinge shaft 3 is passed through the three hinge holes, wherein the step ring 10 of the hinge shaft 3 contacts the end face of the door bracket 10, and the end of the hinge shaft 3 that has the limit head 11 in advance contacts the end face of the vehicle body bracket 2, and at this time the other end also completely passes through the three hinge holes, and the limit head 11 is connected above this end. When specifically connected, the equipment can be press-riveted or It is made by cold heading, wherein the outer wall of the hinge shaft 3 is provided with a knurled area 8, and the knurled area 8 is a clearance fit when passing through the first hinge hole or the third hinge hole (if the hinge shaft 3 passes through from top to bottom, it passes through the first hinge hole, and if it passes through from bottom to top, it passes through the third hinge hole). When it enters the second hinge hole 19, it is an interference fit. At this time, the knurled area 8 will squeeze the second hinge hole, so that the inner wall of the second hinge hole is also squeezed into a rough inner wall by the knurled area 8. When the hinge shaft platform ring 10 surface contacts the door bracket 1, it means that the knurled area 8 has completely entered the second hinge hole, and the hinge shaft 3 and the third hinge hole are in contact. The two hinge holes 19 will be in a state of being connected as one body, and there will be no relative rotation between the two, that is, the hinge shaft 3 and the door bracket 1 are fixedly connected. When the car door drives the door bracket 1 to rotate, the hinge shaft 3 will be directly driven to rotate. Since the hinge shaft 3 is connected to the bushing 4, it will rotate relative to the bushing 4, thereby realizing the normal opening and closing of the door. In addition, since the hinge shaft 3 and the door bracket 1 are fixedly connected, a gasket 5 is provided between the bushing 4 and the limit head 11 of the hinge shaft 3, wherein the gasket 5 can be one piece each on the upper and lower sides, or only the upper piece can be provided. The door weight G is transferred to the bushing 4 by the hinge shaft 3. The bushing 4 shares the weight of the entire door by the axial end face (i.e. the upper surface of the flange) and the radial side face. Since the contact surface between the gasket 5 and the limit head 11 is relatively rough, the limit head 11 moves directly with the gasket 5 when rotating. Most of the door's gravity G is converted into a vertical downward force and is borne by the flange of the bushing 4. Another part of the door's gravity generates a rotational trend component on the hinge shaft, which is borne by the radial surface of the bushing 4. The contact area between the chain shaft 3 and the bushing 4 that bears the force increases, and the external force per unit surface of the bushing 4 becomes smaller, so the compression deformation of the bushing 4 and the amount of wear during rotation can be effectively reduced.

[0035] In traditional structures, such as Figure 1As shown, the two bushings 4 are connected to the upper and lower ends of the hinge hole on the door bracket 1. The distance between the two bushings 4 is small, and the force arm formed by the center of gravity and the hinge is long. The hinge shaft 3 is fixed to the body bracket 2. The hinge hole of the door bracket 1 has a tendency to flip relative to the hinge shaft 3. The flange edge of the bushing 4 will be directly stressed and the end face will be locally squeezed on one side. The local flange cannot bear the weight of the entire door, and compression will occur under extrusion. After compression, the material thickness becomes thinner, causing the hinge itself to move and the door to sink more severely. The bushing 4 of the present invention is It is connected to the hinge hole of the vehicle body bracket 2, and the hinge shaft 3 is fixed to the door bracket 1 by knurling. The distance between the two bushings 4 is large, and the force on the bushing 4 is transformed from the force on the edge of the flange to the force on the inner wall of the bushing 4, which effectively increases the force area. Therefore, the force per unit area of ​​the inner wall of the bushing 4 is reduced, it will not deform, and its service life is longer. At the same time, since the distance between the two bushings 4 increases, the lever arm of the bushing 4 increases. Under the condition of unchanged torque (the gravity of the door remains unchanged), the pressure transmitted to the bushing 4 by the hinge shaft 3 is reduced.

[0036] Furthermore, a connecting hole is provided on the side of the second hinge body 18, and a fixing component is connected to the connecting hole for pressing the hinge shaft 3. In addition, in order to achieve a better fixing effect between the hinge shaft 3 and the door bracket 1, especially in the area where the hinge shaft 3 is not knurled, there will be a gap of 0-0.1mm between it and the second hinge hole. This gap may cause the hinge shaft 3 to shake when the vehicle passes through a bumpy road, and finally cause the door bracket 1 to move up. In order to avoid this situation, a connecting hole is provided on the side of the second hinge body 18, and a fixing component is connected to the connecting hole. The fixing component can be a threaded fixing pin or a knurled fixing pin 6. Specifically, the present invention adopts a threaded fixing pin 6, which is connected to the connecting hole by tightening the fixing pin 6. Its end face directly abuts the hinge shaft 3, ensuring that the hinge shaft 3 and the second hinge hole do not rotate relative to each other.

[0037] Furthermore, the upper or lower region of the hinge shaft 3 further comprises a thickened wall 9. A stepped ring 10 at the end of the thickened wall 9 matches the upper or lower end of the second hinge hole, and the knurled area 8 of the hinge shaft 3 is adjacent to the thickened wall 9. Specifically, the provision of the thickened wall 9 enables the stepped ring 10 on the hinge shaft 3 to engage with the second hinge hole during assembly, thereby acting as a position-limiting support and preventing the door bracket 1 from sliding downward under abusive conditions (such as when a heavy object is hoisted on the door).

[0038] Furthermore, the hinge shaft 3 is provided with a groove 7 for accommodating iron filings. The design of the groove 7 allows metal filings generated by the compression between the knurled area 8 and the second hinge hole to fall into the groove during installation of the hinge shaft 3, thereby further enhancing the engagement force between the hinge shaft 3 and the second hinge hole 19 and preventing the hinge shaft 3 and the second hinge hole 19 from moving relative to each other in the axial direction.

[0039] Furthermore, the outer wall of the fixing pin 6 is also provided with knurling. Specifically, the outer wall of the fixing pin 6 of the present invention is also provided with knurling, and the fixing pin 6 is directly pressed into a connecting hole provided on the side of the second hinge body to achieve the positioning of the fixing pin 6.

[0040] Furthermore, the height of the knurled area 8 of the hinge shaft 3 is one-fifth the height of the inner wall of the second hinge hole. If the knurled area 8 is too long, assembly efficiency will be lower or the required press-fitting equipment will be more expensive. If it is too short, it will not be able to effectively secure the hinge shaft to the door bracket 1. In practice, it has been found that setting the height of the knurled area 8 to one-fifth the height of the inner wall of the second hinge hole 18 is more appropriate.

[0041] Furthermore, when the thickened wall 9 of the hinge shaft 3 is in the upper area, an annular groove 12 is provided on the hinge shaft 3, the pressing side of the fixing pin 6 has an inclined surface, and the groove wall of the annular groove 12 has a matching inclined surface 13 corresponding to the inclined surface. The hinge shaft 3 of the present invention can be installed from bottom to top, such as Figure 4 As shown, when installed from bottom to top, the thickened wall 9 of the hinge shaft 3 is in the lower area, and the knurled area 8 is also in the lower area. At this time, there is no need to set the annular groove 12 on the hinge shaft 3, because the door bracket 1 will not fall down due to the restriction of the step ring 10; if the hinge shaft 3 is installed from top to bottom, as shown in FIG. Figure 5 As shown, the thickened wall 9 of the hinge shaft 3 is in the upper area. At this time, since the step ring 10 is at the top, it cannot play the role of limiting the door bracket 1, so an annular groove 12 is opened on the hinge shaft 3 and matches the fixing pin 6 connected to the body bracket 2, thereby limiting the door bracket 1 from falling downward. In addition, in order to make the fixing pin 6 more smoothly match the annular groove 12 on the hinge shaft 3, an inclined surface is provided on the end face of the fixing pin 6. At the same time, the groove wall of the annular groove 12 is provided with a matching inclined surface 13. By matching the inclined surfaces, even if there is a slight error in the size of the fixing pin 6 or the connecting hole, it will not affect the assembly of the fixing pin 6.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A single hinge for an axially driven vehicle door, characterized in that: include: A vehicle body bracket, comprising a vehicle body connecting frame and a first hinged body, wherein the first hinged body comprises an upper connecting plate and a lower connecting plate, wherein the upper connecting plate and the lower connecting plate are fixedly connected via a column, and wherein a first hinge hole and a third hinge hole are respectively formed in the upper connecting plate and the lower connecting plate; A door bracket, comprising a door connecting frame and a second hinged body, wherein the second hinged body is provided with a second hinged hole; A pin shaft assembly, which includes a hinge shaft, a bushing, and a gasket. The hinge shaft passes through a first hinge hole, a second hinge hole, and a third hinge hole. The outer wall of the hinge shaft is also provided with a knurled area. The knurled area and the second hinge hole are interference fit. There are also limit heads at both ends of the hinge shaft. Bushings are respectively connected to the first hinge hole and the third hinge hole. The flanges of the bushings are respectively in contact with the upper connecting plate and the lower connecting plate. The gasket is connected between the flange of the bushing and the limit head of the hinge shaft.

2. The single hinge for an axially driven vehicle door according to claim 1, characterized in that: A connecting hole is also provided on the side surface of the second hinged body, and a fixing component for pressing the hinge shaft is connected to the connecting hole.

3. The single hinge for an axially driven vehicle door according to claim 2, characterized in that: The fixing component is a fixing pin.

4. The single hinge for an axially driven vehicle door according to claim 3, characterized in that: The upper region or the lower region of the hinge shaft further has a thickened wall, and the step ring at the end of the thickened wall matches the upper end or the lower end of the second hinge hole.

5. The single hinge for an axially driven vehicle door according to claim 4, characterized in that: The hinge shaft is also provided with a groove for accommodating iron filings.

6. The single hinge for an axially driven vehicle door according to claim 5, characterized in that: The fixing pin is a threaded pin.

7. The single hinge for an axially driven vehicle door according to claim 6, characterized in that: The height of the knurled area of ​​the hinge shaft is one fifth of the height of the inner wall of the second hinge hole.

8. The single hinge for an axially driven vehicle door according to claim 7, characterized in that: When the thickened wall of the hinge shaft is in the upper area, an annular groove is provided on the hinge shaft, the pressing side of the fixing pin has an inclined surface, and the groove wall of the annular groove has a matching inclined surface corresponding to the inclined surface.

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