Middle hinge assembly of automobile sliding door

Abstract

The utility model discloses an automobile sliding door middle hinge assembly which comprises a hinge movable piece and a hinge static piece, a rotating shaft is arranged in a hinge hole of the hinge movable piece, protection assemblies are arranged at the upper end and the lower end of the rotating shaft, and each protection assembly comprises an annular connecting groove formed in the upper end and the lower end of the outer side of the rotating shaft. The annular connecting groove is sleeved with a lining. By installing the lining, the defects of interference and coating damage caused by parts in the rotating process can be effectively overcome, the overall rotating flexibility of the hinge is improved, meanwhile, the abrasion degree of the contact positions of the hinge movable piece, the hinge static piece and the rotating shaft can be reduced, the contact positions of the rotating shaft are prevented from becoming thin and loosing, and the service life of the hinge is prolonged. And meanwhile, the balls installed at the bottom of the annular connecting groove are in sliding connection with the annular sliding groove in the bottom of the lining, friction generated by rotation of the movable piece of the hinge is further reduced, and the service life of the rotating shaft is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a middle hinge assembly for an automobile sliding door. Background Technique

[0002] A car door hinge is a component that connects the car door and the vehicle body. On the one hand, the car door hinge bears the weight of the car door, and on the other hand, the car door hinge serves as the hub for opening or closing the car door. Since a sliding door can reduce the space in the width direction of the vehicle body when it is opened, it is widely used in models such as minibuses and micro box trucks. Generally, the car door and the vehicle body are connected by three hinges, namely, an upper hinge, a middle hinge, and a lower hinge. The middle hinge of the sliding door mainly plays the roles of bearing weight and guiding. With the rapid development of the logistics industry, the market share of micro box trucks is increasing.

[0003] In the prior art, for example, a middle hinge structure for a sliding door disclosed in a Chinese utility model patent (publication number: CN218438896U) improves the stability of the linear movement of the hinge by arranging a torsion spring in the middle hinge, provides a restoring force for the turning part of the car door, reduces the closing force, and the addition of a guide wheel assembly can better control the running track of the sliding door; the load-bearing wheel assembly bears the weight of the sliding door and makes the rotation smoother, reducing the rotational resistance.

[0004] However, the above technical solution still has certain defects. Along with the pushing and pulling use of the car door, the contact between the main spindle pin and the connecting part will continuously rub and cause a certain degree of wear. After a long time, the main spindle pin becomes thinner, resulting in looseness at the contact between the movable frame and the pin shaft, which may lead to the phenomenon that the hinge disengages from the guide rail. Therefore, a middle hinge assembly for an automobile sliding door is proposed. Content of the Utility Model

[0005] Based on this, the purpose of the present utility model is to provide a middle hinge assembly for an automobile sliding door to solve the technical problems raised in the above background.

[0006] To achieve the above purpose, the present utility model provides the following technical solution: A middle hinge assembly for an automobile sliding door includes a hinge moving piece and a hinge static piece. A rotating shaft is arranged in the hinge hole of the hinge moving piece. Protective components are arranged at both the upper and lower ends of the rotating shaft. The protective component includes an annular connecting groove opened at the upper and lower ends of the outer side of the rotating shaft. A bushing is sleeved outside the annular connecting groove. Threaded holes are opened at both the upper and lower ends of the rotating shaft. A screw is threadedly connected in the threaded hole. A limiting block is fixedly installed at one end of the screw away from the threaded hole. Anti-slip lines are opened on the outer side of the limiting block.

[0007] As a preferred technical solution of the middle hinge assembly of the sliding door of the present utility model, a plurality of groups of equally spaced balls are installed at the bottom of the annular connection groove, an annular sliding groove matching with the balls is opened at the bottom of the bushing, and the balls are slidably connected with the annular sliding groove.

[0008] As a preferred technical solution of the middle hinge assembly of the sliding door of the present utility model, a torsion spring is sleeved on the rotating shaft, and both ends of the torsion rod of the torsion spring are lapped with the movable hinge piece and the static hinge piece respectively.

[0009] As a preferred technical solution of the middle hinge assembly of the sliding door of the present utility model, two groups of guide wheel seats are fixedly arranged on the upper end surface of the movable hinge piece, guide wheel shafts are fixedly installed on both groups of guide wheel seats, guide wheels are connected to the outside of both groups of guide wheel shafts through bearings, a load-bearing wheel shaft is fixedly installed between the two groups of guide wheel seats on the upper end surface of the movable hinge piece, and a load-bearing wheel is connected to one end of the load-bearing wheel shaft through a bearing.

[0010] As a preferred technical solution of the middle hinge assembly of the sliding door of the present utility model, the cross sections of the movable hinge piece and the static hinge piece are both U-shaped structures.

[0011] As a preferred technical solution of the middle hinge assembly of the sliding door of the present utility model, a plurality of groups of reinforcing ribs are fixedly installed at the bending part inside the movable hinge piece.

[0012] As a preferred technical solution of the middle hinge assembly of the sliding door of the present utility model, a plurality of groups of assembly holes are opened on the static hinge piece.

[0013] To sum up, the present utility model mainly has the following beneficial effects:

[0014] 1. By installing the bushing, the present utility model can effectively prevent the defects of interference and coating damage during the rotation of parts, improve the overall rotation flexibility of the hinge, reduce the wear degree at the contact positions of the movable hinge piece, the static hinge piece and the rotating shaft, prevent the contact position of the rotating shaft from becoming thinner and thus loose, and avoid the phenomenon that the hinge comes out of the guide rail. At the same time, the balls installed at the bottom of the annular connection groove are slidably connected with the annular sliding groove at the bottom of the bushing, further reducing the friction generated during the rotation of the movable hinge piece and extending the service life of the rotating shaft;

[0015] 2. By rotating the limiting block, taking out the screw rod from the threaded hole opened at the end of the rotating shaft, releasing the limit on the bushing, taking out the bushing and placing a new bushing, the present utility model greatly facilitates the replacement of the bushing by the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 Schematic diagram of the movable hinge plate structure of the present utility model;

[0018] Figure 3 Partial explosion view of the protection component of the present utility model;

[0019] Figure 4 Schematic diagram of the bushing structure of the present utility model.

[0020] In the figure: 100, movable hinge plate; 200, protection component;

[0021] 110, rotating shaft; 120, static hinge plate; 130, assembly hole; 140, torsion spring; 150, guide wheel seat; 160, guide wheel shaft; 170, guide wheel; 180, load-bearing wheel shaft; 190, load-bearing wheel; 1910, reinforcing rib;

[0022] 210, annular connecting groove; 220, ball; 230, bushing; 240, annular sliding groove; 250, threaded hole; 260, screw; 270, limiting block. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0024] Next, the embodiments of the present utility model will be described according to the overall structure of the present utility model.

[0025] A hinge assembly in an automotive sliding door, as Figures 1-4 shown, includes a movable hinge plate 100 and a static hinge plate 120. A rotating shaft 110 is provided in the hinge hole of the movable hinge plate 100. Protection components 200 are provided at both the upper and lower ends of the rotating shaft 110. The protection component 200 includes annular connecting grooves 210 opened at the outer sides of the upper and lower ends of the rotating shaft 110. A bushing 230 is sleeved outside the annular connecting grooves 210. Threaded holes 250 are opened at both the upper and lower ends of the rotating shaft 110. Screws 260 are threadedly connected in the threaded holes 250. A limiting block 270 is fixedly installed at one end of the screw 260 away from the threaded hole 250. Anti-slip threads are provided on the outer side of the limiting block 270. A number of groups of equally spaced balls 220 are installed at the bottom of the annular connecting groove 210. An annular sliding groove 240 matching the balls 220 is opened at the bottom of the bushing 230. The balls 220 are slidably connected with the annular sliding groove 240.

[0026] A bushing 230 is sleeved at the connection between the hinge moving piece 100, the hinge static piece 120 and the rotating shaft 110, which can effectively prevent interference during the rotation of parts and defects in damaging the coating, improve the overall rotational flexibility of the hinge, reduce the wear degree at the contact between the hinge moving piece 100, the hinge static piece 120 and the rotating shaft 110, prevent the thinning of the contact part of the rotating shaft 110 and thus looseness, and avoid the phenomenon that the hinge disengages from the guide rail. At the same time, the ball 220 installed at the bottom of the annular connection groove 210 is slidably connected with the annular chute 240 at the bottom of the bushing 230, further reducing the friction generated during the rotation of the hinge moving piece 100 and prolonging the service life of the rotating shaft 110. When the bushing 230 is worn to a certain extent, by rotating the limit block 270, the screw 260 is taken out from the threaded hole 250 opened at the end of the rotating shaft 110, the limit on the bushing 230 is released, the bushing 230 is taken out, and a new bushing 230 is placed, which greatly facilitates the replacement of the bushing 230 by the operator.

[0027] Please refer particularly to Figure 1 As shown, a torsion spring 140 is sleeved on the rotating shaft 110, and the two ends of the torsion bar of the torsion spring 140 are respectively lapped with the hinge moving piece 100 and the hinge static piece 120.

[0028] By setting the torsion spring 140 in the middle hinge, the stability of the linear motion of the hinge is improved, a restoring force is provided for the turning part of the car door, and the closing force is reduced.

[0029] Please refer particularly to Figure 1 and Figure 2 As shown, two groups of guide wheel seats 150 are fixedly arranged on the upper end surface of the hinge moving piece 100. Guide wheel shafts 160 are fixedly installed on both groups of guide wheel seats 150. Guide wheels 170 are connected to the outside of both groups of guide wheel shafts 160 through bearings. A load-bearing wheel shaft 180 is fixedly installed between the two groups of guide wheel seats 150 on the upper end surface of the hinge moving piece 100. One end of the load-bearing wheel shaft 180 is connected to a load-bearing wheel 190 through a bearing.

[0030] By setting the guide wheels 170, the running track of the sliding door can be better controlled. By setting the load-bearing wheels 190, the sliding door is supported, and at the same time, the rotation is made smoother, reducing the rotation resistance.

[0031] Please refer particularly to Figure 1 and Figure 2 As shown, the cross-sections of the hinge moving piece 100 and the hinge static piece 120 are both U-shaped structures. A number of groups of reinforcing ribs 1910 are fixedly installed at the bent part inside the hinge moving piece 100, and a number of groups of assembly holes 130 are opened on the hinge static piece 120.

[0032] By setting the cross-sections of the movable hinge piece 100 and the fixed hinge piece 120 as U-shaped structures, the structural stiffness of the movable hinge piece 100 and the fixed hinge piece 120 is ensured. By providing the reinforcing rib 1910, the structural stiffness of the movable hinge piece 100 is increased. By providing a plurality of groups of assembly holes 130, it is convenient to fixedly install the fixed hinge piece 120 on the sliding door through bolts.

[0033] During use, a bushing 230 is sleeved at the connection between the movable hinge piece 100, the fixed hinge piece 120 and the rotating shaft 110, which can effectively prevent defects such as interference and damage to the coating during the rotation of the parts, and improve the overall rotational flexibility of the hinge. At the same time, it can reduce the wear degree at the contact between the movable hinge piece 100, the fixed hinge piece 120 and the rotating shaft 110, prevent the contact part of the rotating shaft 110 from becoming thinner and thus loose, and avoid the phenomenon that the hinge disengages from the guide rail. At the same time, the rolling balls 220 installed at the bottom of the annular connection groove 210 are slidably connected with the annular sliding groove 240 at the bottom of the bushing 230, further reducing the friction generated during the rotation of the movable hinge piece 100 and extending the service life of the rotating shaft 110. When the bushing 230 is worn to a certain extent, by rotating the limit block 270, the screw 260 is taken out from the threaded hole 250 opened at the end of the rotating shaft 110, the limit on the bushing 230 is released, the bushing 230 is taken out, and a new bushing 230 is placed, which greatly facilitates the replacement of the bushing 230 by the operator. The parts not involved in this device are the same as or can be implemented using the prior art.

[0034] Although the embodiments of the present invention have been shown and described, the specific embodiments are only explanations of the present invention and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments according to needs, but as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A hinge assembly for a sliding door of an automobile, comprising a hinge movable plate (100) and a hinge stationary plate (120), wherein a rotating shaft (110) is arranged in a hinge hole of the hinge movable plate (100), and characterized in that: The upper and lower ends of the rotating shaft (110) are both provided with protection components (200), and the protection components (200) include annular connecting grooves (210) opened at the upper and lower ends of the outer side of the rotating shaft (110), and the outer surface of the annular connecting groove (210) is connected with a bushing (230), and the upper and lower ends of the rotating shaft (110) are provided with threaded holes (250), and the threaded holes (250) are internally threadedly connected with a screw rod (260), and a limit block (270) is fixedly installed at one end of the screw rod (260) away from the threaded hole (250), and the outer side of the limit block (270) is provided with anti-slip grooves.

2. The vehicle sliding door center hinge assembly according to claim 1, characterized in that: A plurality of groups of equally spaced balls (220) are installed at the bottom of the annular connecting groove (210), an annular sliding groove (240) matching the balls (220) is provided at the bottom of the bushing (230), and the balls (220) are slidably connected to the annular sliding groove (240).

3. The vehicle sliding door center hinge assembly according to claim 1, characterized in that: A torsion spring (140) is sleeved on the rotating shaft (110), and two ends of the torsion rod of the torsion spring (140) are overlapped with the hinge moving plate (100) and the hinge static plate (120) respectively.

4. The vehicle sliding door center hinge assembly according to claim 1, characterized in that: Two groups of guide wheel seats (150) are fixedly arranged on the upper end surface of the hinge movable plate (100), and guide wheel shafts (160) are fixedly installed on the two groups of guide wheel seats (150). The outer sides of the two groups of guide wheel shafts (160) are connected to guide wheels (170) via bearings. A load-bearing wheel shaft (180) is fixedly installed on the upper end surface of the hinge movable plate (100) between the two groups of guide wheel seats (150), and one end of the load-bearing wheel shaft (180) is connected to a load-bearing wheel (190) via a bearing.

5. The vehicle sliding door center hinge assembly according to claim 1, characterized in that: The cross-sections of the hinge moving piece (100) and the hinge static piece (120) are both U-shaped structures.

6. The vehicle sliding door center hinge assembly according to claim 1, characterized in that: A plurality of groups of reinforcing ribs (1910) are fixedly installed at the bending portion inside the hinge movable plate (100).

7. The vehicle sliding door center hinge assembly according to claim 1, characterized in that: The hinge static piece (120) is provided with a plurality of groups of assembly holes (130).

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