A roof handle based on a four-bar mechanism for a vehicle and a vehicle

Abstract

This utility model provides a car roof handle and vehicle based on a four-bar linkage, belonging to the field of automotive parts technology. It includes: a base with a proximal hinge and a distal hinge, located at different positions along the depth of the base; one end of a first rocker arm hinged to the proximal hinge of the base, and the other end of the first rocker arm hinged to a connecting arm; one end of a second rocker arm hinged to the distal hinge of the base, and the other end of the second rocker arm hinged to a connecting arm; the connecting arm is hinged to the handle body. The first rocker arm, the second rocker arm, the connecting arm, and the base constitute a four-bar linkage. The advantages of this utility model are: the four-bar linkage allows for extension and retraction between the handle body and the base, enabling the handle body to be retracted and close to the base when not in use, and extended when in use, saving interior space and adapting well to bumpy driving environments.

Description

Technical Field

[0001] This utility model belongs to the field of automotive parts technology, and relates to a car roof handle based on a four-bar linkage and the vehicle. Background Technology

[0002] A roof handle is a grabbing device installed on the roof of a vehicle. When passengers enter or exit the vehicle, they can use the roof handle for leverage to make it easier to get in and out of the vehicle. During aggressive driving, when cornering on mountain roads, passing through bumpy sections, or when braking suddenly, passengers can use the roof handle to stabilize their body posture and avoid swaying or collisions inside the vehicle.

[0003] Existing roof grab handles are generally divided into fixed and flip-up structures. These two common structures protrude from the vehicle's roof, not only occupying interior space but also increasing the risk of passengers' heads colliding with the grab handles. Currently, a very small number of retractable roof grab handles exist, such as a utility model patent application with application number CN202321963826.9 entitled "Safety Grab Handle." This grab handle uses a crank-slider structure to extend and retract the handle. However, the crank-slider structure is not well adapted to bumpy driving environments, so there is room for improvement. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a vehicle roof handle based on a four-bar linkage and the vehicle itself.

[0005] The objective of this utility model can be achieved through the following technical solution: a vehicle roof handle based on a four-bar linkage, comprising:

[0006] A base having a proximal hinge and a distal hinge, the proximal hinge and the distal hinge being located at different positions in the depth direction of the base;

[0007] A handle body, at least one end of which is connected to the base via a telescopic device, wherein the end of the handle body can move closer to or further away from the base via the telescopic device;

[0008] The telescopic device includes a first rocker arm, a second rocker arm, and a connecting arm. One end of the first rocker arm is hinged to the proximal hinge portion of the base, and the other end of the first rocker arm is hinged to the connecting arm. One end of the second rocker arm is hinged to the distal hinge portion of the base, and one end of the second rocker arm is hinged to the connecting arm. The connecting arm is hinged to the handle body. The first rocker arm, the second rocker arm, the connecting arm, and the base constitute a four-bar linkage.

[0009] Preferably, the depth direction of the base is defined as a direction perpendicular to the bottom surface of the base, and the straight-line distance between the proximal hinge portion and the bottom surface of the base is less than the straight-line distance between the distal hinge portion and the bottom surface of the base.

[0010] Preferably, the proximal hinge and the distal hinge are located at different positions along the length of the base.

[0011] Preferably, the linkage arm has a first hinge portion, a second hinge portion, and a third hinge portion, the first rocker arm is hinged to the first hinge portion, the second rocker arm is hinged to the second hinge portion, the end of the handle body is hinged to the third hinge portion, and the first hinge portion, the second hinge portion, and the third hinge portion are located on the same straight line.

[0012] Preferably, the second hinge portion is located between the first hinge portion and the third hinge portion, the portion of the connecting arm located between the first hinge portion and the second hinge portion is a connecting rod portion, and the portion of the connecting arm located between the second hinge portion and the third hinge portion is an extension push-pull portion.

[0013] Preferably, both the first rocker arm and the second rocker arm are located on one side of the connecting arm.

[0014] Preferably, the proximal hinge portion is point A, the first hinge portion is point B, the distal hinge portion is point C, the second hinge portion is point D, and the third hinge portion is point E.

[0015] Among them, the length of line segment AB is less than the length of line segment CD, the length of line segment AC is less than the length of line segment AB, and the lengths of line segments BD and DE are equal and both less than the length of line segment AC.

[0016] Preferably, a torsion spring is provided between the second rocker arm and the distal hinge portion, one end of the torsion spring is in contact with the second rocker arm and the other end is in contact with the base, and the torsion spring applies a torque to the handle body through the telescopic device to make it tend to retract.

[0017] Preferably, the base is provided with two telescopic devices, which are arranged in a mirror image along the length of the base, and are respectively connected to both ends of the handle body.

[0018] A vehicle includes the aforementioned four-bar linkage-based roof handle, and also includes an inner roof located inside the vehicle, with a base fixedly connected to the inner roof.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] 1. The four-bar linkage allows for the extension and retraction of the handle body and the base, so that the handle body can be in a retracted state that is close to the base when not in use, and can be extended when in use, saving interior space and adapting well to bumpy driving environments.

[0021] 2. A key purpose of designing the frame of this telescopic device (four-bar linkage) in an inclined manner is to align the first, second, and third hinges on the same straight line. This collinearity greatly simplifies the structure of the linkage arm (which can be a straight bar), reducing manufacturing difficulty and cost. More importantly, it allows the force acting on the handle body to be transmitted more directly and unbiasedly to the entire linkage arm, with a clear mechanical path, high force transmission efficiency, and more stable and predictable mechanism motion.

[0022] 3. The proximal hinge and the distal hinge are located at different positions in the depth direction of the base. This means that the line connecting the proximal hinge and the distal hinge (i.e., the frame part) is inclined to the length direction of the base. This inclined frame makes the structure of the four-bar linkage more compact, requires less space during movement, and can greatly optimize the movement path, so that the end of the handle body can move along a straight trajectory.

[0023] 4. The design of the proximal and distal hinge sections (i.e., the inclined frame section) is very scientific and reasonable. When the telescopic device is extended (when the handle is extended), the force between the first rocker arm and the second rocker arm and the base is uniform, thus preventing the base from breaking.

[0024] 5. By cleverly selecting the rod length ratio, a large stroke at point E can be achieved using a limited swing angle, and it has better structural rigidity and load-bearing capacity, and can withstand larger loads and impacts. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the retracted state of the vehicle roof handle of this utility model.

[0026] Figure 2 This is a schematic diagram of the extended state of the vehicle roof handle of this utility model.

[0027] Figure 3 This is a schematic diagram of the internal structure of the vehicle roof handle of this utility model when it retracts.

[0028] Figure 4 This is a schematic diagram of the internal structure of the vehicle roof handle of this utility model when extended.

[0029] Figure 5 This is a schematic diagram of the telescopic device of this utility model when it retracts.

[0030] Figure 6This is a schematic diagram of the telescopic device of this utility model when it is unfolded.

[0031] Figure 7 This is a partial exploded view of the vehicle roof handle of this utility model.

[0032] Figure 8 This is a schematic diagram showing the state comparison of the four-bar linkage of this utility model when it is extended and retracted.

[0033] In the figure, 100 is the base; 110 is the proximal hinge; 120 is the distal hinge; 200 is the handle body; 300 is the first rocker arm; 400 is the second rocker arm; 500 is the connecting rod arm; 510 is the first hinge; 520 is the second hinge; 530 is the third hinge; 540 is the connecting rod; 550 is the extension push-pull part; and 600 is the torsion spring. Detailed Implementation

[0034] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0035] like Figures 1 to 8 As shown, a car roof handle based on a four-bar linkage includes:

[0036] The base 100 is provided with a proximal hinge portion 110 and a distal hinge portion 120, which are located at different positions in the depth direction of the base 100.

[0037] The handle body 200 is connected to the base 100 by a telescopic device at least one end of the handle body 200, and the end of the handle body 200 can move closer to or further away from the base 100 by the telescopic device.

[0038] The telescopic device includes a first rocker arm 300, a second rocker arm 400, and a connecting arm 500. One end of the first rocker arm 300 is hinged to the proximal hinge portion 110 of the base 100, and the other end of the first rocker arm 300 is hinged to the connecting arm 500. One end of the second rocker arm 400 is hinged to the distal hinge portion 120 of the base 100, and one end of the second rocker arm 400 is hinged to the connecting arm 500. The connecting arm 500 is hinged to the handle body 200. The first rocker arm 300, the second rocker arm 400, the connecting arm 500, and the base 100 constitute a four-bar linkage.

[0039] The working principle of this handle is as follows: a telescopic device (dual rocker mechanism) is used to support the handle body 200 to move closer to (retract) or further away from the base 100 (extend). It is important to note that the telescopic device is designed as a four-bar structure, which cleverly replaces the common slider mechanism. The structure is simpler and more reliable, and it also has advantages in durability, stability, and feel.

[0040] The first rocker arm 300 and the second rocker arm 400 are actually two rockers of a four-bar linkage (double rocker mechanism) (i.e., the first rocker arm 300 and the second rocker arm 400 can only rotate within a limited angle). The base 100 is actually the frame of the four-bar linkage, and the connecting arm 500 is the connecting rod of the four-bar linkage. The handle body 200 and the telescopic device are linked together. When the telescopic device moves, the movement trajectory of the hinge point at the end of the connecting arm 500 and the handle body 200 is a straight line or approximately a straight line, thereby enabling the handle body 200 to extend and retract along a predetermined trajectory.

[0041] The core design of the telescopic device lies in the fact that the proximal hinge 110 and the distal hinge 120 are located at different positions in the depth direction of the base 100. This means that the line connecting the proximal hinge 110 and the distal hinge 120 (i.e., the frame portion) is inclined along the length direction of the base 100. This inclined frame allows the four-bar linkage to be more compact, requires less space during movement, and significantly optimizes the movement path, enabling the end of the handle body 200 to move along a straight trajectory. Furthermore, the design of the proximal hinge 110 and the distal hinge 120 (i.e., the inclined frame portion) is scientifically sound. When the telescopic device is extended (the handle is extended), the force between the first rocker arm 300 and the second rocker arm 400 and the base 100 is evenly distributed, preventing the base 100 from breaking.

[0042] It should be noted that some handles use a crank-slider mechanism to achieve the telescopic effect. However, the guide rail of the crank-slider mechanism requires high manufacturing precision to ensure smooth slider movement. In the bumpy environment of a car, the guide rail is prone to deformation or uneven force, causing the slider to jam or wobble, producing abnormal noise and affecting the feel. In contrast, the four-bar mechanism of this handle (especially the double rocker design) is a rigid linkage system. The hinge point mainly bears the rotational load, and the hinge design can effectively distribute the load and absorb the impact. This makes the entire handle stable when pulled down, returned to its original position, and when the vehicle is bumpy, without any wobbling or looseness.

[0043] Based on the above embodiments, the depth direction of the base 100 is defined as a direction perpendicular to the bottom surface of the base 100. The straight-line distance between the proximal hinge portion 110 and the bottom surface of the base 100 is less than the straight-line distance between the distal hinge portion 120 and the bottom surface of the base 100. That is, there is a height difference between the proximal hinge portion 110 and the base 100 in the vertical direction, and the proximal hinge portion 110 is closer to the bottom surface of the base 100, while the distance between the distal hinge portion 120 and the bottom surface of the base 100 is relatively far.

[0044] Based on the above embodiments, the proximal hinge portion 110 and the distal hinge portion 120 are located at different positions in the length direction of the base 100.

[0045] The proximal hinge 110 and the distal hinge 120 not only have a height difference in the depth direction, but also a gap in the length direction of the base 100. This makes the line connecting the proximal hinge 110 and the distal hinge 120 (the frame part) tilted. This design further optimizes the motion trajectory and control of the four-bar linkage, making the four-bar linkage move more flexibly within its stroke range.

[0046] Based on the above embodiments, the linkage arm 500 has a first hinge portion 510, a second hinge portion 520 and a third hinge portion 530, the first rocker arm 300 is hinged to the first hinge portion 510, the second rocker arm 400 is hinged to the second hinge portion 520, the end of the handle body 200 is hinged to the third hinge portion 530, and the first hinge portion 510, the second hinge portion 520 and the third hinge portion 530 are located on the same straight line.

[0047] It is important to note that a key purpose of designing the frame of this telescopic device (four-bar linkage) in an inclined manner is to ensure that the first hinge 510, the second hinge 520, and the third hinge 530 are aligned on the same straight line. This collinearity greatly simplifies the structure of the linkage arm 500 (which can be a straight bar), reducing manufacturing difficulty and cost. More importantly, it allows the force acting on the handle body 200 to be transmitted more directly and unbiasedly to the entire linkage arm 500, with a clear mechanical path, high force transmission efficiency, and more stable and predictable mechanism movement.

[0048] If the hinge point of the first rocker arm 300 (i.e., the second rocker arm 400) and the base 100 is in the same position in the depth direction, then the three hinge parts on the connecting arm 500 need to be designed to be very complex, which will cause the three hinge parts on the connecting arm 500 to be unable to be collinear, greatly increasing the processing difficulty and making it easy for errors to occur, thus affecting the motion trajectory of the four-bar linkage.

[0049] like Figures 3 to 5 , Figure 8As shown, based on the above embodiment, the second hinge portion 520 is located between the first hinge portion 510 and the third hinge portion 530, the part of the connecting arm 500 located between the first hinge portion 510 and the second hinge portion 520 is the connecting rod portion 540, and the part of the connecting arm 500 located between the second hinge portion 520 and the third hinge portion 530 is the extended push-pull portion 550.

[0050] The part of the linkage arm 500 from point B to point D is called the linkage section 540, which is the link that makes up the body of the four-bar linkage. The part from point D to point E is called the extension push-pull section 550, whose main function is to transmit the motion of the four-bar linkage to the handle body 200. Therefore, point E is equivalent to an extension point of the linkage arm 500 (BD).

[0051] like Figures 3 to 8 As shown, based on the above embodiment, both the first rocker arm 300 and the second rocker arm 400 are located on one side of the connecting arm 500. In this four-bar linkage, the two rocker arms are located on the same side, which makes the four-bar linkage structure more compact and occupies less space.

[0052] like Figures 3 to 8 As shown, based on the above embodiment, the proximal hinge portion 110 is point A, the first hinge portion 510 is point B, the distal hinge portion 120 is point C, the second hinge portion 520 is point D, and the third hinge portion 530 is point E.

[0053] Among them, the length of line segment AB is less than the length of line segment CD, the length of line segment AC is less than the length of line segment AB, and the lengths of line segments BD and DE are equal and both less than the length of line segment AC.

[0054] This design, through the clever selection of the rod length ratio, can achieve a large stroke at point E using a limited swing angle, and has better structural rigidity and load-bearing capacity, enabling it to withstand larger loads and impacts.

[0055] like Figures 5 to 7 As shown, based on the above embodiment, a torsion spring 600 is provided between the second rocker arm 400 and the distal hinge portion 120. One end of the torsion spring 600 is in contact with the second rocker arm 400 and the other end is in contact with the base 100. The torsion spring 600 applies a torque to the handle body 200 through the telescopic device, causing it to tend to retract.

[0056] The purpose of designing the torsion spring 600 is to enable the handle body 200 to automatically retract and reset. In actual use, passengers can manually pull out the handle body 200; after use, under the action of the torsion spring 600, the second rocker arm 400 rotates, driving the handle body 200 to retract through the telescopic device.

[0057] In addition, a damper is provided between the first rocker arm 300 and the base 100. The function of the damper is to limit the movement speed of the handle body 200, so that the handle body 200 moves as smoothly as possible, especially to slow down the retraction speed of the handle body 200 and suppress rebound impact.

[0058] like Figures 1 to 4 As shown, based on the above embodiment, the base 100 is provided with two telescopic devices. The two telescopic devices are arranged in a mirror image in the length direction of the base 100, and the two telescopic devices are respectively connected to both ends of the handle body 200.

[0059] In this design, two sets of four-bar linkages are arranged symmetrically in a mirror image, connecting the two ends of the handle body 200 respectively, ensuring the stability, balance, and smoothness of the handle's pull-down and retraction processes. The simultaneous and coordinated movement of both ends prevents the handle from tilting, jamming, or wobbling.

[0060] like Figures 1 to 8 As shown, based on the above embodiments, a vehicle includes a roof handle based on a four-bar linkage, and also includes an inner roof located inside the vehicle, with a base 100 fixedly connected to the inner roof.

[0061] The inner roof is located at the top of the vehicle body. A roof handle is installed near the door on the inner roof. When passengers enter or exit the vehicle, they can use the roof handle for leverage to make it easier to get in and out of the vehicle. During aggressive driving, cornering on mountain roads, passing through bumpy sections, and sudden braking, passengers can use the roof handle to stabilize their body posture and avoid swaying or collisions inside the vehicle.

[0062] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0063] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0064] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0065] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A vehicle roof handle based on a four-bar linkage, characterized in that, include: A base (100) is provided with a proximal hinge (110) and a distal hinge (120), the proximal hinge (110) and the distal hinge (120) being located at different positions in the depth direction of the base (100). A handle body (200), at least one end of which is connected to the base (100) via a telescopic device, wherein the end of the handle body (200) can move closer to or further away from the base (100) via the telescopic device; The telescopic device includes a first rocker arm (300), a second rocker arm (400), and a connecting arm (500). One end of the first rocker arm (300) is hinged to the proximal hinge portion (110) of the base (100), and the other end of the first rocker arm (300) is hinged to the connecting arm (500). One end of the second rocker arm (400) is hinged to the distal hinge portion (120) of the base (100), and one end of the second rocker arm (400) is hinged to the connecting arm (500). The connecting arm (500) is hinged to the handle body (200). The first rocker arm (300), the second rocker arm (400), the connecting arm (500), and the base (100) constitute a four-bar linkage.

2. The vehicle roof handle based on a four-bar linkage as described in claim 1, characterized in that: The depth direction of the base (100) is defined as the direction perpendicular to the bottom surface of the base (100), and the straight distance between the proximal hinge (110) and the bottom surface of the base (100) is less than the straight distance between the distal hinge (120) and the bottom surface of the base (100).

3. A car roof handle based on a four-bar linkage as described in claim 2, characterized in that: The proximal hinge (110) and the distal hinge (120) are located at different positions along the length of the base (100).

4. A car roof handle based on a four-bar linkage as described in claim 3, characterized in that: The linkage arm (500) has a first hinge portion (510), a second hinge portion (520) and a third hinge portion (530). The first rocker arm (300) is hinged to the first hinge portion (510), the second rocker arm (400) is hinged to the second hinge portion (520), and the end of the handle body (200) is hinged to the third hinge portion (530). The first hinge portion (510), the second hinge portion (520) and the third hinge portion (530) are located on the same straight line.

5. A car roof handle based on a four-bar linkage as described in claim 4, characterized in that: The second hinge portion (520) is located between the first hinge portion (510) and the third hinge portion (530). The portion of the connecting arm (500) located between the first hinge portion (510) and the second hinge portion (520) is a connecting rod portion (540), and the portion of the connecting arm (500) located between the second hinge portion (520) and the third hinge portion (530) is an extension push-pull portion (550).

6. A car roof handle based on a four-bar linkage as described in claim 1, characterized in that: The first rocker arm (300) and the second rocker arm (400) are both located on one side of the connecting arm (500).

7. A car roof handle based on a four-bar linkage as described in claim 4, characterized in that: The proximal hinge (110) is point A, the first hinge (510) is point B, the distal hinge (120) is point C, the second hinge (520) is point D, and the third hinge (530) is point E. Among them, the length of line segment AB is less than the length of line segment CD, the length of line segment AC is less than the length of line segment AB, and the lengths of line segments BD and DE are equal and both less than the length of line segment AC.

8. A car roof handle based on a four-bar linkage as described in claim 1, characterized in that: A torsion spring (600) is provided between the second rocker arm (400) and the distal hinge (120). One end of the torsion spring (600) is in contact with the second rocker arm (400) and the other end is in contact with the base (100). The torsion spring (600) applies a torque to the handle body (200) through the telescopic device, causing it to tend to retract.

9. A car roof handle based on a four-bar linkage as described in claim 1, characterized in that: The base (100) is provided with two telescopic devices, which are arranged in a mirror image of the base (100) along its length. The two telescopic devices are respectively connected to both ends of the handle body (200).

10. A vehicle, characterized in that, The vehicle roof handle based on a four-bar linkage as described in any one of claims 1 to 9, further includes an inner roof located inside the vehicle, with a base (100) fixedly connected to the inner roof.

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