Automobile rear cover hinge structure

Abstract

The utility model discloses an automobile rear cover hinge structure, which is applied to the technical field of automobile rear covers and comprises an arch-shaped arm, a fixing seat is arranged at the top of the arch-shaped arm, a rotating shaft in bolted connection with the fixing seat is rotatably connected to one end, close to the fixing seat, of the arch-shaped arm in a penetrating manner, and an oil injection hole is formed in one side of the interior of the fixing seat. And a connecting hole communicating with the oil injection hole is formed in the rotating shaft. The oil injection hole is opened by pressing the conical plug, so that lubricating oil can be extruded from the surface of the rotating shaft through the oil injection hole and the connecting hole. And therefore, the lubricating oil is uniformly coated between the rotating shaft and the arch-shaped arm, the coating uniformity of the lubricating oil is improved, and it is guaranteed that the automobile rear cover can be smoothly opened and closed through the hinge structure. When the torsion spring rotates in the clamping sleeve and the clamping groove, the torsion spring is in contact friction with the tooth-shaped protruding block, and therefore abrasion between the torsion spring and the interior of the clamping sleeve and the clamping groove is avoided. And meanwhile, the tooth-shaped convex blocks can reduce the contact surface with the torsion spring, so that the friction abnormal sound generated when the torsion spring rotates is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of automotive rear cover technology, and specifically relates to an automotive rear cover hinge structure. Background Technology

[0002] A car trunk lid hinge is mainly used to connect the trunk lid of a car to the car body, allowing the trunk lid to rotate within a certain range and enabling smooth opening and closing.

[0003] Currently, a Chinese utility model with announcement number CN205349048U discloses a hinge structure for an automobile trunk.

[0004] Existing car tailgate hinge structures often experience stiffness after prolonged use, primarily due to corrosion of the hinge shaft. However, the hinge shaft in these existing designs is typically installed inside the car, and because it's connected to the car from the top, lubrication can only be applied from the bottom up. This method of application makes it difficult for the lubricant to be fully coated onto the shaft surface due to gravity, eventually causing the hinge to jam and become unable to rotate. Furthermore, existing tailgate hinges rely mainly on the spring force to overcome the torsion spring when the tailgate is opened, and the spring's return force easily returns the tailgate to its original position when closed. However, the friction area between the torsion spring and the hinge structure is relatively large during torsion, leading to significant wear and tear over time, and also causing abnormal noises due to friction. Utility Model Content

[0005] The purpose of this utility model is to provide a car rear cover hinge structure, which has the advantages of facilitating the replenishment of lubricating oil to the hinge structure and reducing the rotational wear between the hinge structure and the torsion spring.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a car rear cover hinge structure, including an arched arm, a fixed seat provided at the top of the arched arm, a rotating shaft bolted to the fixed seat and rotatably connected to one end of the arched arm near the fixed seat, an oil injection hole provided on one side inside the fixed seat, a connecting hole communicating with the oil injection hole provided inside the rotating shaft, a conical plug slidably connected inside the oil injection hole, and a spring fixedly connected to the fixed seat and bolted to the side of the conical plug near the rotating shaft.

[0007] Using the above technical solution, pressing the conical plug opens the oil injection hole, allowing lubricating oil to be squeezed out from the surface of the rotating shaft through the oil injection hole and connecting hole. This evenly coats the lubricating oil between the rotating shaft and the bow-shaped arm, improving the uniformity of lubricating oil coating and ensuring smooth opening and closing of the car's rear cover via the hinge structure. The torsion spring, as it rotates inside the sleeve and slot, contacts and rubs against the toothed protrusion, preventing wear on the inside of the sleeve and slot. Simultaneously, the toothed protrusion reduces the contact area with the torsion spring, thereby reducing frictional noise generated during torsion spring rotation.

[0008] The present invention is further configured such that: a rocker arm is provided at the bottom of the fixed base and is rotatably connected to the bow-shaped arm; a retaining sleeve is welded to the end of the rocker arm away from the bow-shaped arm; a retaining groove is provided at the bottom of the fixed base; a torsion spring is engaged inside the retaining groove; and the end of the torsion spring away from the retaining groove is engaged inside the retaining sleeve.

[0009] By employing the above technical solution, the spring force of the torsion spring is overcome during the opening of the car's tailgate, causing the torsion spring to rotate within the sleeve and slot, which in turn drives the rocker arm to rotate on the bow-shaped arm. Then, when closing the car's tailgate, the restoring force of the torsion spring can drive the tailgate to return to its original position.

[0010] The present invention is further configured such that: both the sleeve and the slot are welded with arc-shaped plates, and the inner surface of the arc-shaped plates is provided with toothed protrusions that are slidably connected to the torsion spring.

[0011] By adopting the above technical solution, wear caused by the rotation of the torsion spring against the inside of the sleeve and slot is avoided. At the same time, the contact area with the torsion spring is reduced, thus reducing frictional noise generated when the torsion spring rotates.

[0012] The present invention is further configured such that a mounting plate is welded to the end of the bow-shaped arm away from the fixed base.

[0013] Using the above technical solution, the end of the bow-shaped arm away from the fixed seat can be mounted on the rear cover of the car through the mounting plate.

[0014] The present invention is further configured such that threaded holes are provided through the top of both the fixing base and the mounting plate.

[0015] By using the above technical solution, the fixing seat and the mounting plate can be respectively bolted to the trunk and the rear cover of the car by using bolts to penetrate the inside of the threaded hole for thread engagement.

[0016] The present invention is further configured such that the two ends of the bow-shaped arm are respectively installed on the car trunk and the car rear cover via a fixing seat and a mounting plate.

[0017] By adopting the above technical solution, the bow-shaped arm can support the rear cover of the car after it is opened.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. By pressing the conical plug to open the oil injection hole, lubricating oil can be squeezed out from the surface of the rotating shaft through the oil injection hole and the connecting hole. This evenly coats the lubricating oil between the rotating shaft and the bow-shaped arm, improving the uniformity of lubricating oil coating and ensuring that the car's rear cover can be smoothly opened and closed through the hinge structure;

[0020] 2. The torsion spring contacts and rubs against the toothed protrusions as it rotates inside the sleeve and slot, thus preventing wear on the inside of the sleeve and slot. At the same time, the toothed protrusions reduce the contact area with the torsion spring, thereby reducing frictional noise generated when the torsion spring rotates. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 This is a schematic diagram of one side of a partial structure of this utility model;

[0023] Figure 3 This is a cross-sectional view of a partial structure of this utility model from another side.

[0024] Reference numerals in the attached diagram: 1. Bow-shaped arm; 2. Fixed base; 3. Rotating shaft; 4. Oil injection hole; 5. Connecting hole; 6. Spring; 7. Conical plug; 8. Rocker arm; 9. Sleeve; 10. Slot; 11. Torsion spring; 12. Arc plate; 13. Toothed protrusion; 14. Mounting plate; 15. Threaded hole. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1:

[0027] refer to Figure 1 , Figure 3 A car rear cover hinge structure includes an arched arm 1, a fixed seat 2 at the top of the arched arm 1, and a rotating shaft 3 bolted to the fixed seat 2 through one end of the arched arm 1 near the fixed seat 2. An oil injection hole 4 is provided on one side inside the fixed seat 2, and a connecting hole 5 communicating with the oil injection hole 4 is provided inside the rotating shaft 3. A conical plug 7 is slidably connected inside the oil injection hole 4, and a spring 6 fixedly connected to the fixed seat 2 is bolted to the side of the conical plug 7 near the rotating shaft 3. By pressing the conical plug 7, the oil injection hole 4 is opened, allowing lubricating oil to be squeezed out from the surface of the rotating shaft 3 through the oil injection hole 4 and the connecting hole 5. This uniformly coats the lubricating oil between the rotating shaft 3 and the arched arm 1, improving the uniformity of lubricating oil coating and ensuring smooth opening and closing of the car rear cover through the hinge structure.

[0028] refer to Figure 1 A mounting plate 14 is welded to the end of the bow-shaped arm 1 away from the fixed base 2. This allows the end of the bow-shaped arm 1 away from the fixed base 2 to be mounted on the rear cover of the car via the mounting plate 14.

[0029] refer to Figure 1 Both the mounting base 2 and the mounting plate 14 have threaded holes 15 extending through their tops. By using bolts to engage the threads inside the threaded holes 15, the mounting base 2 and the mounting plate 14 can be respectively fastened to the trunk and the rear cover of the car.

[0030] refer to Figure 1 The two ends of the bow-shaped arm 1 are respectively installed to the car trunk and the car tailgate via the fixing seat 2 and the mounting plate 14. After the car tailgate is opened, the bow-shaped arm 1 can support the car tailgate.

[0031] Brief description of usage: By pressing the conical plug 7 to overcome the elastic force of the spring 6, the conical plug 7 retracts into the fixed seat 2, thereby opening the oil filling hole 4. Lubricating oil can then enter the interior of the rotating shaft 3 through the oil filling hole 4 and be squeezed outwards through the connecting hole 5, evenly coating the friction surfaces between the rotating shaft 3 and the bow-shaped arm 1. Simultaneously, after releasing the conical plug 7, the spring 6's rebound force can re-seal the oil filling hole 4, thus preventing dust from entering the interior.

[0032] Example 2:

[0033] refer to Figure 1 , Figure 2 A hinge structure for a car rear cover is disclosed. A rocker arm 8, rotatably connected to an arc-shaped arm 1, is located at the bottom of a mounting base 2. A retaining sleeve 9 is welded to the end of the rocker arm 8 away from the arc-shaped arm 1. A retaining groove 10 is formed at the bottom of the mounting base 2, and a torsion spring 11 is engaged inside the groove 10. The end of the torsion spring 11 away from the groove 10 is engaged with the inside of the retaining sleeve 9. Arc-shaped plates 12 are welded inside both the retaining sleeve 9 and the groove 10. Toothed protrusions 13, slidably connected to the torsion spring 11, are formed on the inner surface of the arc-shaped plates 12. When the torsion spring 11 rotates inside the retaining sleeve 9 and the groove 10, it contacts and rubs against the toothed protrusions 13, thus preventing wear on the inside of the retaining sleeve 9 and the groove 10. Simultaneously, the toothed protrusions 13 reduce the contact area with the torsion spring 11, thereby reducing frictional noise generated when the torsion spring 11 rotates.

[0034] Brief description of usage: By overcoming the spring force of the torsion spring 11 during the opening of the car tailgate, the torsion spring 11 rotates inside the retainer 9 and the slot 10, driving the rocker arm 8 to rotate on the bow-shaped arm 1. Then, when closing the car tailgate, the restoring force of the torsion spring 11 drives the car tailgate to return to its original position. During the opening and closing of the car tailgate, the torsion spring 11 rotates inside the retainer 9 and the slot 10 respectively by contacting the toothed protrusion 13, thus avoiding contact with the inner surfaces of the retainer 9 and the slot 10 and preventing wear. At the same time, the toothed protrusion 13 reduces the contact area with the torsion spring 11, thereby reducing the frictional noise generated when the torsion spring 11 rotates.

[0035] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A structure of a hinge for a rear cover of an automobile, comprising an arcuate arm (1), characterized in that: The top of the arc-shaped arm (1) is provided with a fixed seat (2), one end of the arc-shaped arm (1) near the fixed seat (2) is penetrated through and rotationally connected with a rotation shaft (3) bolted with the fixed seat (2), one side of the inside of the fixed seat (2) is provided with an oil injection hole (4), the inside of the rotation shaft (3) is provided with a connecting hole (5) in communication with the oil injection hole (4), the inside of the oil injection hole (4) is slidably connected with a tapered plug (7), one side of the tapered plug (7) near the rotation shaft (3) is bolted with a spring (6) fixedly connected with the fixed seat (2).

2. The automobile deck lid hinge structure according to claim 1, characterized by: The bottom of the fixed seat (2) is provided with a rocker arm (8) rotationally connected with the arc-shaped arm (1), one end of the rocker arm (8) away from the arc-shaped arm (1) is welded with a clamping sleeve (9), the bottom of the fixed seat (2) is provided with a clamping groove (10), the inside of the clamping groove (10) is clamped with a torsion spring (11), one end of the torsion spring (11) away from the clamping groove (10) is clamped with the inside of the clamping sleeve (9).

3. The automobile deck lid hinge structure according to claim 2, characterized by: The inside of the clamping sleeve (9) and the clamping groove (10) is welded with an arc-shaped plate (12), the inner surface of the arc-shaped plate (12) is provided with a toothed protrusion (13) slidably connected with the torsion spring (11).

4. The automobile deck lid hinge structure according to claim 1, characterized by: One end of the arc-shaped arm (1) away from the fixed seat (2) is welded with a mounting plate (14).

5. The structure of claim 4, wherein: The top of the fixed seat (2) and the mounting plate (14) is penetrated and provided with a threaded hole (15).

6. The structure of claim 4, wherein: The two ends of the arc-shaped arm (1) are respectively mounted with the automobile trunk and the automobile back cover through the fixed seat (2) and the mounting plate (14).

Images