Trunk lid hinge and vehicle equipped with same

Abstract

The utility model relates to a trunk lid hinge and a vehicle equipped with the trunk lid hinge, the trunk lid hinge comprises a hinge support, one side of the hinge support is provided with a guide piece, and the lower edge of the guide piece comprises a first guide part and a second guide part; one end of the hinge arm is hinged to the first position of the hinge support, a strip-shaped groove is formed in the position, close to the end, of the hinge arm, and in the direction from front to back, the distance between each position on the first guide part and the first position is gradually increased, and the distance between each position on the second guide part and the first position is gradually decreased; one end of the torsion bar is hinged to the second position of the hinge support; the first end of the hinge connecting rod is hinged to the strip-shaped groove of the hinge arm, the second end of the hinge connecting rod is hinged to the other end of the torsion bar, and the hinge connecting rod can transmit torque of the torsion bar to the hinge arm. On the premise that enough opening power is kept in the middle stage, the opening acceleration in the initial stage and the opening speed in the final stage are reduced.

Description

Technical Field

[0001] This utility model relates to the field of vehicles, and more particularly to a trunk lid hinge and a vehicle equipped with the trunk lid hinge. Background Technology

[0002] Existing trunk lid hinges typically include: a hinge bracket fixed to the vehicle body, a hinge arm, a torsion bar, and a hinge link. The hinge arm and torsion bar are hinged to the hinge bracket, and both ends of the hinge link are hinged to the hinge arm and the torsion bar, respectively. This trunk lid hinge uses the hinge link to transmit the torque provided by the torsion bar to the hinge arm, thereby allowing the trunk lid to open fully.

[0003] In existing technology, the hinge link and hinge arm are connected in a fixed position, causing the torque exerted by the torsion bar on the hinge arm (see reference). Figure 1 The curve of the "existing torsion bar" and the torque exerted on the hinge arm by the weight of the trunk lid (reference) Figure 1 The difference in the curve of "gravity" is as follows Figure 1 As shown. From Figure 1 As can be seen, in the initial stage of the opening process, the difference between the two factors is too large, which leads to excessive acceleration in the opening of the trunk lid. In the final stage of opening, the difference is also too large, which will cause the trunk lid to open too quickly and bounce back after hitting the vehicle body, resulting in a poor user experience throughout the opening process. In order to ensure that the trunk lid can be fully opened, the torque applied by the torsion bar to the hinge arm in the middle stage of the opening process needs to be greater than the torque applied by the weight of the trunk lid to the hinge arm. This requires that the deformation of the torsion bar in the initial stage (i.e., the preload) be large enough; otherwise, the trunk lid cannot be fully opened.

[0004] from Figure 1 Based on the trend of torque change, it is necessary to reduce the torque of the torsion bar in the initial and final stages of the opening process, and not to reduce the torque of the torsion bar in the middle stage of the opening process.

[0005] The magnitude of the torque exerted by the torsion bar on the hinge arm is usually positively correlated with the deformation of the torsion bar and the torque transmission ratio. However, the deformation of the torsion bar continuously decreases during the opening process, making it difficult to meet the aforementioned requirements. Therefore, changing the magnitude of the torque exerted by the torsion bar on the hinge arm by altering the torque transmission ratio becomes a possible solution to the problem.

[0006] The information disclosed in the background section of this utility model is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Utility Model Content

[0007] The purpose of this invention is to provide a trunk lid hinge and a vehicle equipped with the hinge. By utilizing a guide member, the torque transmission ratio of the torque applied by the torsion bar to the hinge arm initially increases and then decreases. This modification, while ensuring sufficient opening force in the intermediate stage, reduces the difference between the torque applied by the torsion bar to the hinge arm and the torque applied by the weight of the trunk lid to the hinge arm in the initial stage, and also reduces the difference in magnitude between the torque applied by the torsion bar to the hinge arm and the torque applied by the weight of the trunk lid to the hinge arm in the final stage. This results in a reduced opening acceleration in the initial stage and a smooth opening speed without rebound in the final stage. Because sufficient opening force is maintained in the intermediate stage, the trunk lid can be fully opened without an external power source.

[0008] According to a first aspect of the present invention, a luggage lid hinge is provided, comprising: a hinge bracket having a guide on one side, the lower edge of the guide including a first guide portion and a second guide portion; a hinge arm having one end hinged to a first position of the hinge bracket and having a strip-shaped groove extending along its length near the one end, wherein the distance from each position on the first guide portion to the first position gradually increases in a front-to-back direction, and the distance from each position on the second guide portion to the first position gradually decreases; a torsion bar having one end hinged to a second position of the hinge bracket; and a hinge link having a first end hinged to the strip-shaped groove of the hinge arm and a second end hinged to the other end of the torsion bar, the hinge link being capable of transmitting the torque of the torsion bar to the hinge arm.

[0009] Preferably, the luggage compartment lid hinge further includes: a shaft assembly passing through a first end of the hinge link and a slot in the hinge arm; wherein, during the opening of the luggage compartment lid, when the two ends of the shaft assembly abut against a first guide and slide along the first guide, the shaft assembly can slide along the slot towards the first end away from the slot because the distance from each position of the first guide to the first position gradually increases; when the two ends of the shaft assembly abut against a second guide and slide along the second guide, the shaft assembly can slide along the slot towards the first end of the slot because the distance from each position of the second guide to the first position gradually decreases.

[0010] Preferably, the guide includes a guide body; in the direction from front to back, the distance from each position of the lower half of the guide body to the first position gradually increases to form the first guide portion; the lower half of the guide body is provided with an anti-drop bracket, the anti-drop bracket has an arc-shaped baffle at its outer edge, and in the direction from front to back, the distance from each position on the baffle to the first position gradually decreases to form the second guide portion.

[0011] Preferably, the first end of the hinge link has a first mounting hole; the shaft assembly includes a shaft body and limiting portions located at both ends of the shaft body, the shaft body passing through the first mounting hole of the hinge link and the slot of the hinge arm, the outer diameter of the limiting portion being larger than the diameter of the shaft body; the luggage compartment lid hinge further includes: a first bushing fitted on the shaft body, the first bushing being located between the inner surface of the first mounting hole of the hinge link and the outer surface of the shaft body to reduce the friction between the hinge link and the shaft body; the first bushing is also located between the inner surface of the slot of the hinge arm and the outer surface of the shaft body to reduce the friction between the hinge arm and the shaft body; a gasket fitted on the shaft body of the shaft assembly and located between the hinge link and the hinge arm to reduce the friction between the hinge link and the hinge arm.

[0012] Preferably, the hinge bracket has a second mounting hole at its first position, and the hinge arm has a third mounting hole corresponding to the second mounting hole at its first end; the luggage compartment lid hinge further includes: a pin that passes through the second mounting hole of the hinge bracket and the third mounting hole of the hinge arm; and a second bushing that is fitted onto the pin, the second bushing being located between the inner surface of the third mounting hole of the hinge arm and the outer surface of the pin to reduce the friction between the hinge arm and the pin; the second bushing is also located between the inner surface of the second mounting hole of the hinge bracket and the outer surface of the pin to reduce the friction between the hinge bracket and the pin.

[0013] Preferably, the hinge bracket and the guide are integrally formed.

[0014] Preferably, the guide can be detachably mounted to the hinge bracket.

[0015] Preferably, the first guide portion and the second guide portion are coated with lubricating oil to reduce the friction between the two ends of the shaft assembly and the guide.

[0016] Preferably, rolling bearings or rollers are provided at both ends of the shaft assembly to reduce the friction between the shaft assembly and the guide.

[0017] According to a second aspect of the present invention, a vehicle is provided, equipped with a trunk lid hinge as described in the first aspect.

[0018] This utility model's luggage lid hinge utilizes a guide member to ensure that the torque transmission ratio of the torque applied by the torsion bar to the hinge arm initially increases and then decreases. This modification, while maintaining sufficient opening force in the intermediate stage, reduces the difference between the torque applied by the torsion bar to the hinge arm and the torque applied by the weight of the luggage lid to the hinge arm in the initial stage, and also reduces the difference in magnitude in the final stage. This results in a reduced opening acceleration in the initial stage and a smooth, rebound-free opening speed in the final stage. Because sufficient opening force is maintained in the intermediate stage, the luggage lid can be fully opened without an external power source.

[0019] The device of this invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain the particular principles of this invention. Attached Figure Description

[0020] Figure 1 A schematic diagram of the torque acting on the hinge arm;

[0021] Figure 2 This is a three-dimensional structural diagram of the luggage lid hinge according to an embodiment of the present utility model;

[0022] Figure 3 for Figure 2 3D exploded view;

[0023] Figure 4 This is a schematic diagram of the first state of the luggage lid hinge according to the embodiment of this utility model.

[0024] Figure 5 This is a schematic diagram of the second state of the luggage lid hinge according to the embodiment of this utility model;

[0025] Figure 6 This is a side view of the hinge bracket;

[0026] Figure 7 A force decomposition diagram of the shaft assembly as it slides along the first guide portion;

[0027] Figure 8 This is a force decomposition diagram of the shaft assembly sliding along the second guide.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Hinge bracket; 101. First position; 102. Second position; 103. Second mounting hole;

[0030] 200, hinge arm; 201, slot; 202, third mounting hole;

[0031] 300. Torsion bar; 301. Fixed part; 302. Rotating part;

[0032] 400, hinge link; 401, first mounting hole;

[0033] 500. Guide component; 510. First guide section; 520. Second guide section; 530. Anti-fall bracket; 531. Baffle; 540. Guide body; 550. Rear section;

[0034] 601. Shaft assembly; 602. First bushing; 603. Shim; 605. Shaft body; 604. Limiting part;

[0035] 702, Second bushing; 701, Pin;

[0036] 800, Buffer.

[0037] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of this invention. The specific design features disclosed in this invention (including, for example, specific dimensions, orientations, positions, and shapes) will be determined in part by the specific application and environment in which they will be used.

[0038] Throughout these figures, the same reference numerals denote the same or equivalent parts of the present invention. Detailed Implementation

[0039] The present invention will now be described in detail with reference to various embodiments, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with exemplary embodiments, it should be understood that this specification is not intended to limit the present invention to these exemplary embodiments. Rather, the present invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments that may be included within the spirit of the present invention and the scope defined by the appended claims.

[0040] When a component is referred to as being "above" or "on top of" another component, the component may be in contact with the other component, or the component may be spaced apart from the other component, or there may be an intermediate component between the component and the other component.

[0041] The forward direction refers to the direction towards the front of the vehicle (i.e., the direction of travel), while the backward direction refers to the direction towards the rear of the vehicle (i.e., the direction opposite to the forward direction).

[0042] The following is combined with Figures 1 to 8The luggage lid hinge of the present utility model embodiment is described. Figure 1 This is a schematic diagram showing the torque acting on the hinge arm. Figure 1 The horizontal axis represents the rotation angle of hinge arm 200 during the opening process. Figure 1 The vertical axis in the figure represents torque; Figure 2 This is a three-dimensional structural diagram of the luggage lid hinge according to an embodiment of the present utility model; Figure 3 for Figure 2 3D exploded view; Figure 4 This is a schematic diagram of the first state of the luggage lid hinge according to the embodiment of this utility model. Figure 5 This is a schematic diagram of the second state of the luggage lid hinge according to the embodiment of this utility model; Figure 6 This is a side view of the hinge bracket; Figure 7 A force decomposition diagram of the shaft assembly as it slides along the first guide portion; Figure 8 This is a force decomposition diagram of the shaft assembly sliding along the second guide.

[0043] like Figure 2 and Figure 3 As shown, the luggage lid hinge of this utility model embodiment includes: a hinge bracket 100, a hinge arm 200, a torsion bar 300, and a hinge connecting rod 400.

[0044] The hinge bracket 100 has a guide 500 on one side, and the lower edge of the guide 500 includes a first guide portion 510 and a second guide portion 520.

[0045] One end of the hinge arm 200 is hinged to a first position 101 of the hinge bracket 100, and has a strip groove 201 extending along its length near one end. In the front-to-back direction, the distance from each position on the first guide 510 to the first position 101 gradually increases, and the distance from each position on the second guide 520 to the first position 101 gradually decreases.

[0046] One end of the torsion bar 300 is hinged to the second position 102 of the hinge bracket 100.

[0047] The first end of the hinge link 400 is hinged to the slot 201 of the hinge arm 200, and the second end of the hinge link 400 is hinged to the other end of the torsion bar 300. The hinge link 400 can transmit the torque of the torsion bar 300 to the hinge arm 200.

[0048] In this embodiment of the invention, the guide member 500 guides the torque transmission ratio of the torque applied by the torsion bar 300 to the hinge arm 200, causing it to first increase and then decrease. This modification, while ensuring sufficient opening power in the intermediate stage, reduces the difference between the torque applied by the torsion bar 300 to the hinge arm 200 and the torque applied by the weight of the trunk lid to the hinge arm 200 in the initial stage, and also reduces the difference in magnitude between the torque applied by the torsion bar 300 to the hinge arm 200 and the torque applied by the weight of the trunk lid to the hinge arm 200 in the final stage. This results in a reduced opening acceleration in the initial stage and a smooth opening speed without rebound in the final stage. Because sufficient opening power is maintained in the intermediate stage, the trunk lid can be fully opened without an external power source.

[0049] By changing the torque transmission ratio, the magnitude of the torque at different stages of the opening process is altered, allowing the deformation of the torsion bar 300 in the initial stage (i.e., the preload) to be appropriately reduced. This reduces the performance requirements of the torsion bar 300 and lowers manufacturing costs. Specifically, the deformation of the torsion bar 300 in the initial stage refers to the torsional angle of the torsion bar 300 under preload conditions.

[0050] The torque transmission ratio refers to the ratio of the output torque to the input torque in a mechanical transmission system, and can be calculated using the geometric parameters of the mechanical transmission system. In the trunk lid of the vehicle involved in this utility model, the torque transmission ratio can be determined using s / t. Where s is the lever arm of the torque of the torsion bar, i.e., the distance from the hinge link 400 to the first position 101. t is the lever arm of the torque applied by the torsion bar to the hinge arm, i.e., the distance from the hinge link 400 to the second position 102 (see also...). Figure 5 ).

[0051] The aforementioned external power source can be the power for the user to manually lift the trunk lid, or it can be other power sources.

[0052] Figure 2 and Figure 3 The trunk lid hinge described here is based on the one on the left side of the vehicle. A trunk lid hinge is also located on the right side of the vehicle. Both trunk lid hinges share a torsion bar assembly, which includes two torsion bars 300, corresponding to the hinge arms 200 on the left and right sides respectively. Each torsion bar 300 has a fixed portion 301 and a rotating portion 302. The fixed portion 301 is mounted to the vehicle body, and the rotating portion 302 can rotate around a second position 102. The torsion angle of the torsion bar 300 mentioned earlier refers to the angle of rotation of the rotating portion 302 around the second position 102.

[0053] exist Figure 2 In the middle, the guide 500 is set on both sides of the hinge bracket 100.

[0054] In an exemplary implementation, such as Figures 2 to 5 As shown, the luggage compartment lid hinge further includes a shaft assembly 601. The shaft assembly 601 passes through a first end of the hinge link 400 and a slot 201 of the hinge arm 200. Specifically, the first end of the hinge link 400 has a first mounting hole 401, and the shaft assembly 601 passes through the first mounting hole 401 of the hinge link 400 and the slot 201 of the hinge arm 200.

[0055] During the opening of the trunk lid, when the two ends of the shaft assembly 601 abut against the first guide portion 510 and slide along the first guide portion 510 (see...), Figure 4 As the distance from each position on the first guide portion 510 to the first position 101 gradually increases, the shaft assembly 601 will slide along the strip groove 201 in a direction away from the first end of the strip groove 201, that is, slide downward along the strip groove 201.

[0056] When the two ends of the shaft assembly 601 abut against the second guide 520 and slide along the second guide 520 (see...) Figure 5 As the distance from each position on the second guide 520 to the first position 101 gradually decreases, the shaft assembly 601 will slide along the strip groove 201 toward the first end of the strip groove 201, that is, slide upward along the strip groove 201.

[0057] In an exemplary embodiment, the shaft assembly 601 includes a shaft body 605 and a limiting portion 604. The shaft body 605 passes through a first mounting hole 401 of the hinge link 400 and a slot 201 of the hinge arm 200. The outer diameter of the limiting portion 604 is larger than the diameter of the shaft body 605. The limiting portion 604 constitutes an end of the shaft assembly 601.

[0058] In an exemplary embodiment, the shaft body 605 may be in the form of a screw with threads at both ends, and the limiting portion 604 may be in the form of a nut. When installing the shaft assembly 601, the shaft body 605 may first be passed through the first mounting hole 401 of the hinge link 400 and the slot 201 of the hinge arm 200, and then the nut-shaped limiting portion 604 may be respectively installed on the two ends of the shaft body 605 on the outside of the hinge link 400. The specific forms of the shaft body 605 and the limiting portion 604 are not limited thereto.

[0059] In an exemplary implementation, such as Figure 3 As shown, the luggage lid hinge further includes: a first bushing 602 and a gasket 603.

[0060] The first bushing 602 is fitted onto the shaft body 605 of the shaft assembly 601. The first bushing 602 is located between the inner surface of the first mounting hole 401 of the hinge link 400 and the outer surface of the shaft body 605 of the shaft assembly 601, to reduce the friction between the hinge link 400 and the shaft body 605 of the shaft assembly 601. The first bushing 602 is also located between the inner surface of the slot 201 of the hinge arm 200 and the outer surface of the shaft body 605 of the shaft assembly 601, to reduce the friction between the hinge arm 200 and the shaft body 605 of the shaft assembly 601.

[0061] The shim 603 is fitted onto the shaft body 605 of the shaft assembly 601 and located between the hinge link 400 and the hinge arm 200 to reduce the friction between the hinge link 400 and the hinge arm 200.

[0062] In an exemplary implementation, such as Figure 2 As shown, the first position 101 of the hinge bracket 100 has a second mounting hole 103, and the first end of the hinge arm 200 has a third mounting hole 202 corresponding to the second mounting hole 103.

[0063] like Figure 3 As shown, the luggage compartment lid hinge further includes: a pin 701 and a second bushing 702.

[0064] Pin 701 passes through the second mounting hole 103 of hinge bracket 100 and the third mounting hole 202 of hinge arm 200, allowing hinge arm 200 to rotate around pin 701.

[0065] The second bushing 702 is fitted onto the pin 701. The second bushing 702 is located between the inner surface of the third mounting hole 202 of the hinge arm 200 and the outer surface of the pin 701 to reduce the friction between the hinge arm 200 and the pin 701. The second bushing 702 is also located between the inner surface of the second mounting hole 103 of the hinge bracket 100 and the outer surface of the pin 701 to reduce the friction between the hinge bracket 100 and the pin 701.

[0066] In one implementation scheme, such as Figure 2 and Figure 3 As shown, the hinge bracket 100 and the guide 500 are integrated.

[0067] In another embodiment, the guide 500 can be detachably mounted to the hinge bracket 100 to facilitate replacement of the guide 500 in case of damage.

[0068] In an exemplary implementation, such as Figure 2 and Figure 3As shown, the trunk lid hinge further includes a damper 800, which is mounted to the rear side of the hinge arm 200. During the final stage of the opening process, the damper 800 reduces damage to the hinge arm 200 and the vehicle body when the hinge arm 200 is about to collide with the vehicle body.

[0069] like Figure 2 , Figure 3 and Figure 6 As shown, the guide 500 includes a generally fan-shaped guide body 540. In the front-to-back direction, the distance from each position of the front half of the lower edge of the guide body 540 to the first position 101 gradually increases (i.e., distance l1 < distance l2), forming a first guide portion 510. An anti-drop bracket 530 is provided on the rear half 550 of the lower edge of the guide body 540. The anti-drop bracket 530 has an arc-shaped baffle 531 at its outer edge. In the front-to-back direction, the distance from each position on the baffle 531 to the first position 101 gradually decreases (i.e., distance l3 > distance l4), forming a second guide portion 520.

[0070] When the two ends of the shaft assembly 601 are below the front half of the lower edge of the guide body 540 (i.e., the first guide portion 510), the two ends of the shaft assembly 601 contact the first guide portion 510 of the guide body 540 and slide along the first guide portion 510.

[0071] When the two ends of the shaft assembly 601 are located below the rear half of the lower edge of the guide body 540, the baffle 531 of the anti-detachment bracket 530 can support the two ends of the shaft assembly 601 to prevent the shaft assembly 601 from detaching from the guide 500. That is, the two ends of the shaft assembly 601 slide along the second guide portion 520 formed by the baffle 531. When sliding along the second guide portion 520, the two ends of the shaft assembly 601 may not contact the rear half 550 of the lower edge of the guide body 540.

[0072] Specifically, such as Figure 7 As shown, when the shaft assembly 601 is located below the front half of the lower edge of the guide body 540 (i.e., the first guide portion 510), the torsion bar 300 applies a force F to the hinge arm 200 through the hinge link 400. t / bar The component force F along the extension direction of the hinge arm 200 h / axis It's upwards. In the component force F... h / axis Under its influence, shaft assembly 601 will not fall downwards.

[0073] like Figure 8 As shown, when the shaft assembly 601 is located below the rear half 550 of the lower edge of the guide body 540, the torsion bar 300 applies a force F to the hinge arm 200 through the hinge link 400.t / bar The component force F along the extension direction of the hinge arm 200 h / axis It is downward, in the component force F h / axis Under the influence of the guide, the shaft assembly 601 tends to fall downwards. The baffle 531 of the anti-fall bracket 530 can support the two ends of the shaft assembly 601 to prevent the shaft assembly 601 from detaching from the guide 500.

[0074] exist Figures 2 to 5 In one embodiment, the friction between the shaft assembly 601 and the guide 500 is sliding friction. In other embodiments, lubricant can be applied to the first guide 510 and the second guide 520 to reduce the friction between the shaft assembly 601 and the first guide 510 and the second guide 520.

[0075] Alternatively, a rolling bearing or roller can be added to the end of the shaft assembly 601 to change sliding friction into rolling friction, thereby reducing friction.

[0076] This utility model embodiment also provides a vehicle equipped with the aforementioned trunk lid hinge. Other components and functions of the vehicle according to this utility model embodiment are known to those skilled in the art and will not be described in detail to reduce redundancy. The vehicle can be a fuel-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid vehicles, or range-extended vehicles, etc.

[0077] The operation of the luggage lid hinge of this utility model embodiment will be described below with reference to the accompanying drawings.

[0078] like Figure 6 As shown, in the direction from front to back, the distance from each position on the first guide 510 to the first position 101 gradually increases, i.e., distance l1 < distance l2, and the distance from each position on the second guide to the first position 101 gradually decreases, i.e., distance l3 > distance l4.

[0079] During the opening of the trunk lid, when the limiting portion 604 of the shaft assembly 601 (i.e., the two ends of the shaft assembly 601) slides backward along the first guide portion 510 (see...) Figure 4As the distance from each position on the first guide 510 to the first position 101 gradually increases, the shaft body 605 of the shaft assembly 601 slides along the strip groove 201 away from the first end of the strip groove 201, causing the torque transmission ratio of the torque applied by the torsion bar 300 to the hinge arm 200 to gradually increase. This change in torque transmission ratio, while ensuring sufficient opening power in the intermediate stage, eliminates the need for excessive torque applied by the torsion bar 300 to the hinge arm 200 in the initial stage. This reduces the difference between the torque applied by the torsion bar 300 to the hinge arm 200 and the torque applied by the weight of the trunk lid to the hinge arm 200 in the initial stage, resulting in an opening acceleration in the initial stage that is less than that of the prior art in the initial stage.

[0080] When the limiting portion 604 of the shaft assembly 601 slides backward along the second guide portion 520 (see...) Figure 5 As the distance from each position on the second guide 520 to the first position 101 gradually decreases, the shaft body 605 of the shaft assembly 601 slides along the slot 201 towards the first end of the slot 201, causing the torque transmission ratio of the torque applied by the torsion bar 300 to the hinge arm 200 to gradually decrease. This change in torque transmission ratio, while ensuring sufficient opening power in the intermediate stage, reduces the difference between the torque applied by the torsion bar 300 to the hinge arm 200 and the torque applied by the weight of the trunk lid to the hinge arm 200 in the final stage, resulting in a smooth opening speed without rebound in the final stage.

[0081] The aforementioned change in torque transmission ratio also ensures sufficient opening force during the intermediate stage, allowing the trunk lid to be fully opened without the need for an external power source.

[0082] The magnitude of the torque of the torsion bar 300 is generally positively correlated with the deformation of the torsion bar 300 and the torque transmission ratio. If, based on existing technology, only the torque transmission ratio is changed, the curve of the torque exerted by the torsion bar 300 on the hinge arm 200 is obtained as follows: Figure 1 The curve in the image is "Improved Torque Bar 1".

[0083] In a further embodiment, the deformation (i.e., preload) of the torsion bar 300 in the initial stage can be appropriately reduced to obtain a curve of the torque exerted by the torsion bar 300 on the hinge arm 200. Figure 1 The curve "Improved Torque Bar 2" is positioned lower than curve "Improved Torque Bar 1," reducing the difference between it and curve "Gravity." This design further reduces the opening speed of the trunk lid and lowers manufacturing costs.

[0084] For ease of interpretation and precise definition of the appended claims, the terms “upper,” “lower,” “inner,” “outer,” “above,” “below,” “above,” “below,” “upward,” “downward,” “front,” “back,” “behind,” “inner side,” “outer side,” “inward,” “outer,” “internal,” “external,” “inner,” “external,” “forward,” and “backward” are used to describe the features of the exemplary embodiments with reference to the positions of these features shown in the accompanying drawings.

[0085] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and descriptive purposes. It is not intended to be exhaustive, nor to limit the invention to the precise forms disclosed; obviously, many changes and variations are possible in accordance with the foregoing teachings. The exemplary embodiments were chosen and described to explain the specific principles of the invention and its practical application, thereby enabling others skilled in the art to implement and utilize various exemplary embodiments of the invention, as well as their different alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A luggage cover hinge, characterized by, The luggage cover hinge comprises: a hinge bracket having a guide on one side, the lower edge of the guide comprising a first guide portion and a second guide portion; a hinge arm hingedly connected to a first position of the hinge bracket at one end, and having a strip-shaped slot extending along the length thereof at a position close to the one end, the distance from each position on the first guide portion to the first position gradually increasing in the front-to-back direction, and the distance from each position on the second guide portion to the first position gradually decreasing in the front-to-back direction; a torsion bar hingedly connected to a second position of the hinge bracket at one end; and a hinge link hingedly connected to the strip-shaped slot of the hinge arm at a first end thereof, and hingedly connected to the other end of the torsion bar at a second end thereof, the hinge link being capable of transmitting the torque of the torsion bar to the hinge arm. The luggage cover hinge further comprises:

2. The luggage lid hinge of claim 1, wherein, a shaft assembly passing through the first end of the hinge link and the strip-shaped slot of the hinge arm; wherein, during the opening of the luggage cover, when the two ends of the shaft assembly are abutted on and slide along the first guide portion, the shaft assembly is capable of sliding along the strip-shaped slot in a direction away from the first end of the strip-shaped slot due to the gradually increasing distance from each position on the first guide portion to the first position; when the two ends of the shaft assembly are abutted on and slide along the second guide portion, the shaft assembly is capable of sliding along the strip-shaped slot in a direction close to the first end of the strip-shaped slot due to the gradually decreasing distance from each position on the second guide portion to the first position. The guide comprises a guide body; 3. The luggage lid hinge of claim 2, wherein in the front-to-back direction, the distance from each position on the front half of the lower edge of the guide body to the first position gradually increases to form the first guide portion; the rear half of the lower edge of the guide body is provided with an anti-falling bracket having an arc-shaped baffle at the outer edge thereof, the distance from each position on the baffle to the first position gradually decreasing in the front-to-back direction to form the second guide portion. The first end of the hinge link has a first mounting hole; 4. The luggage lid hinge of claim 2, wherein, the shaft assembly comprises a shaft body and limiting portions at both ends of the shaft body, the shaft body passing through the first mounting hole of the hinge link and the strip-shaped slot of the hinge arm, and the outer diameter of the limiting portions being greater than the diameter of the shaft body; The luggage cover hinge further comprises: a first bushing sleeved on the shaft body, the first bushing being located between the inner surface of the first mounting hole of the hinge link and the outer surface of the shaft body to reduce the friction between the hinge link and the shaft body, and the first bushing being located between the inner surface of the strip-shaped slot of the hinge arm and the outer surface of the shaft body to reduce the friction between the hinge arm and the shaft body; a gasket sleeved on the shaft body of the shaft assembly and located between the hinge link and the hinge arm to reduce the friction between the hinge link and the hinge arm. The first position of the hinge bracket has a second mounting hole, and the first end of the hinge arm has a third mounting hole corresponding to the second mounting hole; 5. The luggage lid hinge of claim 2, wherein, The luggage cover hinge further comprises: a pin passing through the second mounting hole of the hinge bracket and the third mounting hole of the hinge arm; and ​ A second bushing is sleeved on the pin, and is located between the inner surface of the third mounting hole of the hinge arm and the outer surface of the pin to reduce the friction between the hinge arm and the pin; the second bushing is also located between the inner surface of the second mounting hole of the hinge bracket and the outer surface of the pin to reduce the friction between the hinge bracket and the pin.

6. The luggage lid hinge of claim 1, wherein, The hinge bracket and the guide are formed integrally.

7. The luggage lid hinge of claim 1, wherein, The guide is detachably mounted to the hinge bracket.

8. The luggage lid hinge of claim 2, wherein, Lubricating oil is attached on the first guide part and the second guide part to reduce the friction between the two ends of the shaft assembly and the guide.

9. The luggage lid hinge of claim 2, wherein, The two ends of the shaft assembly are provided with rolling bearings or rollers to reduce the friction between the shaft assembly and the guide.

10. A vehicle characterized by comprising: The luggage cover hinge is equipped with the luggage cover hinge according to any one of claims 1-9.

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