A connecting structure of a multi-gear door hinge

Abstract

The application provides a connection structure of a gear bracket and a hinge shaft in a multi-gear door hinge, and belongs to the technical field of machinery. It comprises a connecting hole in the shape of a regular polygon arranged on the gear bracket and a connecting head arranged at one end of the hinge shaft and matching the connecting hole in shape. The inner hole wall of the connecting hole has an interference convex ring, the inner hole shape of the interference convex ring is the same as that of the connecting hole, each side hole wall of the connecting hole corresponds to the hole wall of the interference convex ring one by one and is parallel to the hole wall, the connecting head is inserted into the connecting hole and passes through the interference convex ring, the connecting head and the connecting hole are gap-fitted, the connecting head and the interference convex ring are interference-fitted, and the inner wall of the interference convex ring is circumferentially provided with a plurality of notches. It has the advantages of high assembly efficiency, high qualified rate, low assembly difficulty, high connection strength and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of automobile accessories, and relates to a multi-gear door hinge, in particular to a connecting structure of a gear bracket and a hinge shaft in the multi-gear door hinge. BACKGROUND

[0002] The door hinge is an important component connecting the door and the door pillar, and it can realize the opening or closing of the door relative to the vehicle body. The traditional door hinge has simple structure and does not have the door opening degree control and limiting function, so it is easy to cause damage, abnormal sound and other phenomena due to improper force control. Therefore, the multi-gear door hinge appears in the market to overcome the above problems and is widely used in some high-end vehicles. Figure 1 As shown in the figure, the multi-gear door hinge includes hinge seat one 1 and hinge seat two 2 (the hinge seat one 1 is fixed on the door pillar in use, and the hinge seat two 2 is fixed on the door) which are hingedly connected through a hinge shaft 3, the hinge seat two 2 is fixed with the hinge shaft 3, one end of the hinge shaft 3 is fixed with a gear bracket 4, the edge of the gear bracket 4 is connected with a plurality of rotatable rollers 5, the adjacent two rollers 5 form a limiting notch, the rotation center of each roller 5 is located on the same circle, and the hinge seat one 1 is provided with a torsion spring 6. When the hinge seat two 2 swings relative to the hinge seat one 1 to open the door outward, each roller 5 can roll along the torsion spring 6 and make one end of the torsion spring 6 clamped into one of the limiting notches, so that the door can be positioned at a certain opening angle, realizing the multi-gear opening of the door.

[0003] Among them, the gear bracket 4 and the hinge shaft 3 are fixed by interference fit. Specifically, as shown in the figure, Figure 2As shown, the gear bracket 4 includes a first connecting piece 4a and a second connecting piece 4b. Each roller 5 is disposed between the first connecting piece 4a and the second connecting piece 4b. One end of the hinge shaft 3 has a hexagonal connecting head 3a. A connecting hole 4a1 is provided through the first connecting piece 4a. The connecting head 3a is squeezed into the connecting hole 4a1 to form an interference fit. The second connecting piece 4b is sleeved on the connecting head 3a. The connecting holes 4a1 are formed directly by stamping. Before assembly, the positions of the connecting holes 4a1 and the connecting head 3a need to be continuously corrected to achieve alignment. In the actual assembly process, it was found that if the hinge shaft 3 and the gear bracket 4 are to be connected more firmly, the interference fit of the connecting holes 4a1 needs to be set to be larger. However, this results in a large force required for assembly, and it is difficult to disassemble after pressing in. Therefore, if the initial installation angle is not correct, it means that both parts are scrapped. If it is to be easier to assemble, the interference fit must be reduced. If the interference fit is small, the local stress is relatively large during the interference fit, which makes it easy for a large amount of material to be squeezed out, thus making it impossible to maintain the stability of the interference fit, that is, the connection strength cannot be guaranteed. In addition, when the vehicle is driving on a severely bumpy road, it will cause the entire door hinge to vibrate. The combination of these factors will cause the gear bracket 4 and the hinge shaft 3 to loosen. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the prior art by proposing a connection structure between the gear bracket and the hinge shaft in a multi-gear door hinge, which solves the problem of low connection strength when reducing assembly difficulty.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] A connection structure between a gear position bracket and a hinge shaft in a multi-position vehicle door hinge includes a regular polygonal connecting hole on the gear position bracket and a connecting head at one end of the hinge shaft with a shape matching the connecting hole. The connecting hole has an interference-fit ring on its inner wall. The inner shape of the interference-fit ring is the same as that of the connecting hole. Each side wall of the connecting hole corresponds to and is parallel to the wall of the interference-fit ring. The connecting head is inserted into the connecting hole and passes through the interference-fit ring. The connecting head has a clearance fit with the connecting hole and an interference fit with the interference-fit ring. Several notches are distributed circumferentially on the inner wall of the interference-fit ring.

[0007] During assembly, first insert the connecting head of the hinge shaft into the connecting hole. Since the inner hole shape of the interference ring is the same as the connecting hole, and each side wall of the connecting hole corresponds one-to-one with and is parallel to the hole wall of the interference ring, the external shape of the connecting head can be directly aligned with the inner hole of the interference ring after insertion. Then, simply apply force to the hinge shaft to force the connecting head into the inner hole of the interference ring, forming an interference fit.

[0008] In the connecting structure of the gear bracket and the hinge shaft, the interference convex ring is used to replace the connecting hole to interfere with the connecting head, the connecting hole only plays the role of aligning the outer shape of the connecting head and the inner hole of the interference convex ring before interference, thereby omitting the mold time, greatly improving the qualified rate of the product, reducing the error rate during interference, and more capable of ensuring the position accuracy of the connecting head and the inner hole of the interference convex ring during pressing, so that the material is not squeezed out due to mispositioning, and the interference state is maintained. At the same time, since the inner wall of the interference convex ring is provided with a plurality of notches in the circumferential direction, the notches enable the material to be more reasonably and uniformly distributed when the interference convex ring is squeezed, reducing local stress concentration, i.e. offsetting local material deformation, so that the connecting structure can reduce the assembly difficulty by appropriately reducing the interference amount of the interference convex ring, and at the same time, the notches can be used to ensure the interference strength between the connecting head and the interference convex ring when the interference amount of the interference convex ring is reduced.

[0009] In the connecting structure of the gear bracket and the hinge shaft in the multi-gear door hinge, the length of the interference convex ring is 1 / 2-2 / 3 of the length of the connecting hole.

[0010] Through the above setting, it is ensured that the connecting head and the gear bracket have sufficient interference fit length to ensure the connection firmness. At the same time, it can also ensure that there is sufficient length in the connecting hole to guide the connecting head before interference with the interference convex ring, and ensure the assembly accuracy.

[0011] In the connecting structure of the gear bracket and the hinge shaft in the multi-gear door hinge, the gear bracket includes a connecting piece one, the connecting hole is arranged on the connecting piece one, the interference convex ring is formed by stamping from one end hole position of the connecting hole to the other end hole direction, and the connecting head is inserted from the end hole of the connecting hole which is not stamped.

[0012] During production, the connecting hole is first stamped on the connecting piece one by using a punch. Then, only the connecting hole needs to be placed on the corresponding mold, and the punch with a size slightly larger than the connecting hole is used to stamp from one end hole of the connecting hole to the other end hole direction, so that the interference convex ring is formed on the inner wall of the connecting hole. During this stamping, the angle of the punch is aligned with the angle of the connecting hole, i.e. the positions of the vertices of each angle are corresponding, so that the inner hole wall of the interference convex ring is naturally parallel to the inner hole wall of the connecting hole. This forming method is more simple and efficient in processing technology for the sheet structure of the connecting piece one.

[0013] In the connecting structure of the gear bracket and the hinge shaft in the multi-gear door hinge, each notch penetrates through the two side surfaces of the interference convex ring, and each notch is formed on the interference convex ring by stamping.

[0014] After the interference convex ring is formed by stamping, the corresponding punch is used to directly stamp the interference convex ring to form the notch penetrating through the two side faces of the interference convex ring, thereby improving the connecting strength of the connecting head and the interference convex ring and improving the assembly efficiency.

[0015] In the connecting structure of the intermediate gear bracket and the hinge shaft in the multi-gear door hinge, the intermediate gear bracket further comprises a connecting piece II, a plurality of rollers are arranged between the connecting piece I and the connecting piece II, a pin is arranged in each roller, a hole I corresponding to each pin is arranged on the connecting piece I, a hole II corresponding to each pin is arranged on the connecting piece II, one end of the connecting hole is formed by stamping an interference convex ring, and the one end of the connecting hole is arranged on the side face of the connecting piece I facing the connecting piece II. The side face of the connecting piece I facing the connecting piece II has a recessed groove formed after the interference convex ring is stamped out, and the side face of the connecting piece II facing the connecting piece I has a convex platform embedded in the recessed groove to form a circumferential fixation. A through hole penetrating the convex platform is arranged on the connecting piece II, and the connecting head penetrates the through hole and is in clearance fit with the through hole.

[0016] When the interference convex ring is formed by stamping from the one end of the connecting hole, a recessed groove is formed on the face where the one end of the connecting hole is located. The convex platform is arranged on the side face of the connecting piece II facing the connecting piece I, and the recessed groove on the connecting piece I is used to cooperate with the convex platform. When the intermediate gear bracket is assembled, the convex platform is embedded in the recessed groove to form a circumferential fixation. In this way, the angle between the connecting piece I and the connecting piece II can be positioned, and the positions of the hole I on the connecting piece I and the hole II on the connecting piece II are ensured not to be misaligned. In this way, the assembly efficiency of the bracket is improved, and the structure caused by the interference convex ring is reasonably utilized.

[0017] Compared with the prior art, the connecting structure of the intermediate gear bracket and the hinge shaft in the multi-gear door hinge has the following advantages:

[0018] 1. The interference convex ring is used instead of the connecting hole to interfere with the connecting head. The connecting hole only serves to align the outer shape of the connecting head with the inner hole of the interference convex ring before interference. Therefore, the mold time is omitted, the error rate during interference is reduced, and the product qualification rate is greatly improved.

[0019] 2. A plurality of notches are arranged on the inner wall of the interference convex ring in the circumferential direction. The notches enable the material to be more reasonably and uniformly distributed when the interference convex ring is extruded, thereby reducing local stress concentration and offsetting local material deformation. In this way, the connecting structure can reduce the interference amount of the interference convex ring to reduce the assembly difficulty, and can also use the effect of the notches to ensure the interference connecting strength between the connecting head and the interference convex ring when the interference amount of the interference convex ring is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1is a schematic view of a prior art vehicle door hinge.

[0021] Figure 2 is a schematic view of a prior art vehicle door hinge.

[0022] Figure 3 is a schematic view of a prior art vehicle door hinge.

[0023] Figure 4 is a schematic view of a prior art vehicle door hinge.

[0024] Figure 5 is Figure 4 is an enlarged view of A in

[0025] Figure 6 is a schematic view of a prior art vehicle door hinge.

[0026] Figure 7 is a schematic view of a prior art vehicle door hinge.

[0027] Figure 8 is a schematic view of a prior art vehicle door hinge.

[0028] Figure 9 is a schematic view of a prior art vehicle door hinge.

[0029] In the figure, 1, hinge seat one; 2, hinge seat two; 3, hinge shaft; 3a, coupling head; 4, gear bracket; 4a, connecting piece one; 4a1, coupling hole; 4a2, interference convex ring; 4a3, notch; 4a4, recessed groove; 4b, connecting piece two; 4b1, boss; 4b2, through hole; 5, roller; 6, torsion spring; 7, pin shaft. DETAILED DESCRIPTION

[0030] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in conjunction with the accompanying drawings, but the present application is not limited to these embodiments.

[0031] A connecting structure of a gear bracket and a hinge shaft in a multi-gear vehicle door hinge, as shown in Figure 3As shown, the gear bracket 4 comprises a connecting piece one 4a and a connecting piece two 4b, and a plurality of rotatable rollers 5 are arranged between the connecting piece one 4a and the connecting piece two 4b. A pin shaft 7 is arranged in each roller 5. The connecting piece one 4a is provided with a hole position one corresponding to each pin shaft 7, and the connecting piece two 4b is provided with a hole position two corresponding to each pin shaft 7. During assembly, one end of each pin shaft 7 is fixed in the hole position one, then the roller 5 is sleeved on the corresponding pin shaft 7, and then the other end of each pin shaft 7 is inserted through the corresponding hole position two on the connecting piece two 4b, and then a flange is riveted (not shown in the figure), so that the connecting piece one 4a, the connecting piece two 4b and the rollers 5 form the gear bracket 4.

[0032] As shown in Figure 3 and Figure 4 , the connection structure of the gear bracket and the hinge shaft comprises a coupling hole 4a1 arranged on the connecting piece one 4a and being a regular polygon, and a coupling head 3a arranged at one end of the hinge shaft 3 and matching the shape of the coupling hole 4a1. Figures 3-9 As shown in , the inner wall of the coupling hole 4a1 has an interference convex ring 4a2, the inner hole shape of the interference convex ring 4a2 is the same as that of the coupling hole 4a1, and each side wall of the coupling hole 4a1 corresponds to and is parallel to the hole wall of the interference convex ring 4a2, the inner hole wall of the interference convex ring 4a2 is parallel to the inner hole wall of the coupling hole 4a1, the coupling head 3a is clearance fit with the coupling hole 4a1, and the coupling head 3a is inserted into the coupling hole 4a1 and interference fit with the interference convex ring 4a2. The length of the interference convex ring 4a2 is 1 / 2-2 / 3 of the length of the coupling hole 4a1.

[0033] Figure 7 , Figure 8 and Figure 9 , the coupling hole 4a1 is a hexagonal hole, the interference convex ring 4a2 is formed by stamping from one end of the coupling hole 4a1 to the other end, and the one end of the coupling hole 4a1 which is stamped to form the interference convex ring 4a2 is arranged on the side of the connecting piece one 4a facing the connecting piece 4b, and the side of the connecting piece one 4a1 facing the connecting piece two 4b has a recessed groove 4a4 formed after the interference convex ring 4a2 is stamped. During production, the hexagonal punch is used to directly stamp the coupling hole 4a1 on the connecting piece one 4a. Then, only the coupling hole 4a1 is placed on the corresponding mold, and the hexagonal punch with a size slightly larger than the coupling hole 4a1 is used to stamp from one end of the coupling hole 4a1 to the other end, so that the solid part at the one end of the coupling hole 4a1 which is stamped is extruded inward, thereby forming the interference convex ring 4a2 on the inner wall of the coupling hole 4a1. During this stamping, it is ensured that the angle of the hexagonal punch is aligned with the angle of the coupling hole 4a1, that is, the positions of the vertices of the hexagon are corresponding, so that the inner hole wall of the interference convex ring 4a2 formed is parallel to the inner hole wall of the coupling hole 4a1.

[0034] After the gear bracket 4 is installed, the gear bracket 4 is fixed with the hinge shaft 3. During assembly, the connecting head 3a of the hinge shaft 3 is inserted into the connecting hole 4a1. Since the inner hole of the interference convex ring 4a2 is the same as the connecting hole 4a1 and the inner hole wall of the interference convex ring 4a2 is parallel to the inner hole wall of the connecting hole 4a1, after the connecting head 3a is inserted into the connecting hole 4a1, the outer shape of the connecting head 3a can be directly aligned with the inner hole of the interference convex ring 4a2, that is, the angle of the outer hexagon of the connecting head 3a is aligned with the inner hole hexagon of the interference convex ring 4a2. Then, only the force is applied to the hinge shaft 3 to make the connecting head 3a extrude into the inner hole of the interference convex ring 4a2 to form an interference fit.

[0035] Further, as shown in Figure 3 , Figure 6 , Figure 8 and Figure 9 , the inner wall of the interference convex ring 4a2 is circumferentially distributed with a plurality of notches 4a3. In the present embodiment, the notches 4a3 are provided on each inner wall of the inner hole of the interference convex ring 4a2. Each notch 4a3 penetrates through both sides of the interference convex ring 4a2, and each notch 4a3 is formed on the interference convex ring 4a2 by stamping in one step. After the interference convex ring 4a2 is formed by stamping, the corresponding punch is used to directly stamp the interference convex ring 4a2 to form the notches 4a3 that penetrate through both sides of the interference convex ring 4a2. Since the inner wall of the interference convex ring 4a2 is circumferentially provided with a plurality of notches 4a3, when the connecting head 3a extrudes through the inner hole of the interference convex ring 4a2, the notches 4a3 make the material of the interference convex ring 4a2 more reasonably and uniformly distributed when it is extruded, reducing local stress concentration, that is, offsetting local material deformation. This makes the connection structure not only reduce the interference amount of the interference convex ring 4a2 to reduce the assembly difficulty, but also use the effect of the notches 4a3 to ensure the connection strength between the connecting head 3a and the interference convex ring 4a2 when the interference amount of the interference convex ring 4a2 is reduced.

[0036] In the present embodiment, as shown in Figure 4 , Figure 5 and Figure 7 , the side of the connecting piece two 4b facing the connecting piece one 4a has a boss 4b1, and the boss 4b1 is the same shape as the recessed groove 4a4. In the present embodiment, the boss 4b1 is hexagonal, and the boss 4b1 is embedded in the recessed groove 4a4 to fix the connecting piece one 4a and the connecting piece two 4b circumferentially, which can ensure that the hole position one on the connecting piece one 4a and the hole position two on the connecting piece two 4b are staggered when the gear bracket 4 is assembled. The connecting piece two 4b is provided with a through hole 4b2 that penetrates through the boss 4b1, and the through hole 4b2 is the same shape as the cross-sectional shape of the connecting head 3a. The connecting head 3a penetrates through the through hole 4b2 and they are clearance fit.

[0037] The specific embodiments described herein are merely illustrative of the spirit of the application. Various modifications or changes in the specific embodiments described herein can occur to those skilled in the art to which the application pertains without departing from the spirit of the application, and it is understood that such modifications or changes are to be considered as within the scope of the application as defined by the appended claims.

Claims

1. A connection structure of a multi-gear door hinge, comprising a coupling hole (4a1) provided on a gear bracket (4) and being a regular polygon, and a coupling head (3a) provided on one end of a hinge shaft (3) and matching the coupling hole (4a1) in shape, characterized in that, The inner hole wall of the connecting hole (4a1) has an interference convex ring (4a2) with the same inner hole shape as the connecting hole (4a1), each side hole wall of the connecting hole (4a1) corresponds to and is parallel to the hole wall of the interference convex ring (4a2), the connecting head (3a) is inserted into the connecting hole (4a1) and passes through the interference convex ring (4a2), the connecting head (3a) is clearance fit with the connecting hole (4a1) and the connecting head (3a) is interference fit with the interference convex ring (4a2), the inner wall of the interference convex ring (4a2) is circumferentially distributed with a plurality of notches (4a3), the gear bracket (4) comprises a connecting piece one (4a), the connecting hole (4a1) is arranged on the connecting piece one (4a), the interference convex ring (4a2) is formed by stamping from one end hole position of the connecting hole (4a1) to the other end hole direction, the connecting head (3a) is inserted from the one end hole of the connecting hole (4a1) which is not stamped, the gear bracket (4) further comprises a connecting piece two (4b), a plurality of rollers (5) are arranged between the connecting piece one (4a) and the connecting piece two (4b), a pin shaft (7) is arranged in each roller (5), a hole position one corresponding to each pin shaft (7) is arranged on the connecting piece one (4a), a hole position two corresponding to each pin shaft (7) is arranged on the connecting piece two (4b), the one end hole of the connecting hole (4a1) which is stamped to form the interference convex ring (4a2) is arranged on the side surface of the connecting piece one (4a) facing the connecting piece two (4b), and the side surface of the connecting piece one (4a) facing the connecting piece two (4b) has a recessed groove (4a4) formed after stamping the interference convex ring (4a2), the size of the recessed groove (4a4) is larger than the connecting hole (4a1), the side surface of the connecting piece two (4b) facing the connecting piece one (4a) has a convex platform (4b1) embedded in the recessed groove (4a4) to form circumferential fixation, a through hole (4b2) penetrating the convex platform (4b1) is arranged on the connecting piece two (4b), and the connecting head (3a) passes through the through hole (4b2) and is clearance fit.

2. The multi-stage door hinge according to claim 1, wherein The length of the interference convex ring (4a2) is 1 / 2-2 / 3 of the length of the connecting hole (4a1).

3. The multi-stage door hinge according to claim 1 or 2, wherein Each notch (4a3) penetrates through the two side surfaces of the interference convex ring (4a2), and each notch (4a3) is formed on the interference convex ring (4a2) by stamping.

Images