Vehicle door limiter for realizing stepless hovering based on friction

Abstract

The utility model relates to the technical field of parts for automobiles, in particular to an automobile door limiter capable of realizing stepless hovering based on friction. The long shaft sleeve is fixedly sleeved on the outer side of the limiting arm, the elastic sleeve is arranged in the limiting box, elastic sliding friction occurs between the long shaft sleeve and the elastic sleeve in the using process, and the long shaft sleeve and the elastic sleeve can be fixed by adjusting the diameter and the material of the long shaft sleeve and the diameter and the material of the sleeve hole of the elastic sleeve. The sliding friction force in the elastic sliding friction process can be effectively controlled, so that the sliding friction force is balanced with the pushing force or pulling force for opening the vehicle door, and the vehicle door can be suspended at any angle within the opening range of the vehicle door; meanwhile, after the automobile door leaves the hand, the automobile door is kept in situ under the action of friction force, and the stability of suspension of the automobile door is improved. Therefore, the automobile door can be stably suspended at any position within the opening range of the automobile door.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, and particularly relates to a door limiter that realizes stepless hovering based on friction. Background Technique

[0002] A door limiter is a component used to limit the opening angle of a door and enable the door to resist certain interferences (such as lateral wind, door gravity, etc.) without moving.

[0003] Currently, there are various types of door limiters on the market, but generally they can be mainly divided into two categories: mechanical type and motor-driven type. The mechanical type, as the name implies, is a limiter composed of traditional machinery and using human power as the force to open and close the door. The motor-driven type, as the name implies, is a limiter composed of traditional machinery and driven by a motor to open and close the door without human power. In terms of quantity, the mechanical type is more widely used at the present stage. A mechanical door limiter is disclosed in Patent CN113482469B. The door limiter includes a limit bracket, a limit pull plate, and a limit assembly. The limit assembly is fixedly connected to the door. One end of the limit bracket is connected to the vehicle body. The other end of the limit pull plate passes through the limit assembly and extends into the space inside the door. The limit assembly is used to limit the limit pull plate so that the opening and closing angles of the door are fixed.

[0004] Although the above-mentioned door limiter can control the opening and closing of the door, when in use, the opening and closing angles of the door are fixed, that is, the opening degree of the door is divided into three gears. Only when the door is in the gear position, the opened door can resist certain interferences without shaking. However, when the door is between adjacent gears, it is difficult for the door to resist certain interferences and shake; even the door may have a certain speed under the action of the interference at this time, and then the door may be accidentally closed. Thus, it can be seen that the above-mentioned used door limiter is difficult to make the door stably hover at any position. Therefore, corresponding improvements and enhancements are needed to meet the purpose of making the door stably hover at any position. Content of the Utility Model

[0005] In order to avoid and overcome the technical problems existing in the prior art, the utility model provides a door limiter that realizes stepless hovering based on friction. The utility model can effectively make the door stably hover at any position.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] A door limiter that achieves stepless hovering based on friction, comprising a limiting arm hinged to the vehicle body and a limiting box installed on the door through which the limiting arm passes; a long shaft sleeve is fixedly sleeved on the outer side of the limiting arm, and an elastic sleeve is fixedly connected in the guiding hole opened on the limiting box for the limiting arm to pass through; the long shaft sleeve is sleeved in the sleeve hole of the elastic sleeve along with the limiting arm, and an elastic sliding friction fit is formed between the long shaft sleeve and the elastic sleeve, and the sliding friction force in the elastic sliding fit is balanced with the thrust or pulling force for opening the door.

[0008] As a further technical solution of the present invention: the long shaft sleeve comprises a plurality of short shaft sleeves with the same structure, and the shape of the shaft hole of each short shaft sleeve is the same as the cross-sectional shape of the limiting arm at its location.

[0009] As a further technical solution of the present invention: the limiting arm is in the shape of a two-stage stepped shaft, the large-diameter section of the limiting arm is hinged to the vehicle body, and each short shaft sleeve is sequentially sleeved on the small-diameter section of the limiting arm; and an end cover for pressing each short shaft sleeve against the shaft shoulder of the limiting arm is fixedly connected to the outer end of the small-diameter section of the limiting arm.

[0010] As a further technical solution of the present invention: a positioning groove into which the outer end of the small-diameter section of the limiting arm can be inserted is opened on the end cover, and a positioning hole is penetrated through the bottom of the positioning groove; a threaded hole is opened at the outer end of the small-diameter section of the limiting arm, and the front end of a positioning bolt passes through the positioning hole and is threadedly connected with the threaded hole to fix the end cover on the outer end of the small-diameter section of the limiting arm.

[0011] As a further technical solution of the present invention: the guiding hole of the limiting box is a two-stage stepped through hole, and the aperture of the two-stage stepped through hole gradually decreases along the direction away from the connection between the limiting box and the door; the elastic sleeve is coaxially fixedly connected in the large-aperture section of the guiding hole, and a limiting plate for pressing the elastic sleeve against the hole shoulder of the guiding hole is installed at the orifice of the large-aperture section.

[0012] As a further technical solution of the present invention: flanges are formed outward on both sides of the connection between the limiting box and the door, and mounting holes through which bolts pass to fixedly install the limiting box on the vehicle body are opened on the flanges.

[0013] As a further technical solution of the present invention: the elastic sleeve is formed by sequentially enclosing four rectangular rubber blocks.

[0014] As a further technical solution of the present invention: each short shaft sleeve is made of the same rubber material.

[0015] As a further technical solution of the present invention: the outer diameter of the short shaft sleeve is between 1.1 and 1.3 times the aperture of the sleeve hole of the elastic sleeve.

[0016] As a further technical solution of the present utility model: The limiting arm is hinged to the vehicle body through a hinge seat, and the hinge seat is hinged to each other through a hinge shaft.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. A long shaft sleeve is fixedly sleeved on the outer side of the limiting arm of the present utility model. At the same time, an elastic sleeve is arranged in the limiting box. During use, elastic sliding friction occurs between the long shaft sleeve and the elastic sleeve. By adjusting the diameter and material of the long shaft sleeve, as well as the diameter and material of the sleeve hole of the elastic sleeve, the sliding friction force during the elastic sliding friction process can be effectively controlled, so that the sliding friction force is balanced with the thrust or pulling force for opening the vehicle door. In this way, the vehicle door can hover at any angle within its opening range; at the same time, after the vehicle door is released, it stays in place due to the action of the friction force, improving the stability of the vehicle door hovering. It can be seen that the present utility model can stably hover the vehicle door at any position within the opening range of the vehicle door.

[0019] 2. The short shaft sleeve and the elastic sleeve provide a hovering force based on the friction force of rubber and the deformation resistance of rubber, and stepless hovering can be achieved at any position. This design improves the use experience of the vehicle door limiter. Users can adjust the position of the door at any time according to their needs, improving the convenience and comfort of use.

[0020] 3. The present utility model uses multiple short shaft sleeves in combination. When the limiting box slides on the short shaft sleeve on the surface of the limiting arm, the short shaft sleeve in the front deforms due to the friction with the elastic sleeve in the limiting box, and the short shaft sleeve in the rear does not deform because it does not friction with the elastic sleeve. By such an alternating contact method, it can be ensured that each short shaft sleeve made of rubber has enough recovery time, avoiding permanent deformation of the overall long shaft sleeve due to long-term friction and stress, thus greatly improving the service life and reliability of the short shaft sleeve. At the same time, when a certain short shaft sleeve is damaged or fails, only this short shaft sleeve needs to be replaced, rather than replacing other short shaft sleeves on the surface of the entire limiting arm, thus significantly reducing the use and maintenance costs.

[0021] 4. The design of the long shaft sleeve enables only the long shaft sleeve to be replaced when the friction surface fails, without the need to replace the limiting arm, avoiding the disadvantage of having to replace the entire limiting arm after the friction surface of the limiting arm fails. This design not only extends the service life of the limiting arm, but also greatly reduces the maintenance and replacement costs, improving the economy and user satisfaction of the product.

[0022] 5. The size of the end cap is larger than that of the guiding hole of the limit box to prevent the limit arm from disengaging from the limit box during sliding. At the same time, the end cap and the limit arm are connected by positioning bolts. When the end cap is deformed due to long-term collision, only the end cap needs to be replaced, effectively avoiding the situation where the entire limiter needs to be replaced when the fixed connection of the end cap is deformed. This further reduces the maintenance cost, simplifies the repair process, and improves the usage efficiency of the product.

[0023] 6. The limit arm is designed as a straight shaft with a rectangular cross-section, which has a simple structure, is convenient to process, and has a low cost, effectively solving the problem of the complex design of traditional grooved limiters. This straight shaft design not only simplifies the production process, reduces the manufacturing cost, but also improves the stability and durability of the product.

[0024] 7. The utility model mostly adopts the bolt connection method, which is convenient for disassembly, has a simple structure, and has low process requirements. It not only greatly reduces the usage and maintenance costs, but also improves the usability and user satisfaction of the product. This bolt connection method is suitable for large-scale production and maintenance, and better meets the production requirements of modern industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic diagram of the overall structure of the utility model.

[0026] Figure 2 is a cross-sectional view of the utility model.

[0027] Figure 3 is a schematic diagram of the structure of the limit arm in the utility model.

[0028] Figure 4 is a schematic diagram of the structure of the limit box in the utility model.

[0029] In the figure: 1. Limit box; 11. Guiding hole; 12. Elastic sleeve; 121. Sleeve hole; 13. Flange; 131. Mounting hole; 14. Limit plate; 2. Limit arm; 21. Long shaft sleeve; 211. Short shaft sleeve; 22. End cap; 221. Positioning groove; 2211. Positioning hole; 2212. Positioning bolt; 23. Hinge seat; 231. Hinge shaft; 24. Threaded hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] 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. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0031] Please refer to Figures 1 to 4, the hinge shaft 231 is fixedly installed on the vehicle body by bolts to ensure stability and reliability. The hinge shaft 231 is hinged to the limit arm 2 through the hinge shaft, enabling the limit arm 2 to rotate freely relative to the vehicle body. This bolt connection method is not only simple but also strong, capable of withstanding multiple door opening and closing operations during daily use.

[0032] A long bushing 21 is fixedly sleeved on the outer side of the limit arm 2. The long bushing 21 includes a plurality of short bushings 211 with the same structure, and the shape of the shaft holes of each short bushing 211 is the same as the cross-sectional shape of the limit arm 2 at its location. The short bushing 211 is made of durable rubber, forming a hollow square body and sleeved on the limit arm 2. The short bushing 211 cooperates with four rubber blocks in the limiter box to form a friction pair. This design provides effective friction. At the same time, since the rubber will deform under the action of friction, the deformation resistance generated together with the friction provides a hovering force for the door, enabling the door to hover at various opening and closing angles and resist external disturbances such as wind force or the weight of the door itself.

[0033] The limit arm 2 is in the shape of a two-stage stepped shaft. The large-diameter section of the limit arm 2 is hinged to the hinge shaft 231, and each short bushing 211 is sequentially sleeved on the small-diameter section of the limit arm 2. And an end cover 22 for pressing each short bushing 211 against the shoulder of the limit arm 2 is fixedly connected to the outer end of the small-diameter section of the limit arm 2. This design enables the short bushing 211 to remain stable during use and will not shift due to use. A threaded hole 24 is also designed on the right side of the limit arm 2 for screwing with the end cover 22 to further ensure the tight connection and stable operation of each short bushing 211.

[0034] A positioning groove 221 into which the outer end of the small-diameter section of the limit arm 2 can be inserted is opened on the end cover 22, and a positioning hole 2211 is penetrated through the bottom of the positioning groove 221. A threaded hole 24 is opened at the outer end of the small-diameter section of the limit arm 2. The front end of the positioning bolt 2212 passes through the positioning hole 2211 and is threadedly connected to the threaded hole 24 to fix the end cover 22 on the outer end of the small-diameter section of the limit arm 2. The end cover 22 not only has an axial constraint effect on the short bushing 211 but also can limit the displacement of the limit box 1, playing a role in buffering shock and vibration. The end cover 22 is connected to the limit arm 2 through the positioning bolt 2212, providing additional fixation and support. This design effectively protects the limiter, reduces the damage caused by vibration and shock, and improves the durability and reliability of the overall system.

[0035] The guiding hole 11 of the limit box 1 is a two-stage stepped through-hole, and the aperture of the two-stage stepped through-hole gradually decreases along the direction away from the connection between the limit box 1 and the vehicle door. The elastic sleeve 12 is coaxially and fixedly connected inside the large-aperture section of the guiding hole 11, and a limiting plate for pressing the elastic sleeve 12 against the shoulder of the guiding hole 11 is installed at the orifice of the large-aperture section.

[0036] On both sides of the connection between the limit box 1 and the car door, there are flanges 13 formed outward. Installation holes 131 are provided on the flanges 13 for bolts to pass through to fixedly install the limit box 1 on the vehicle body. When the limit box 1 is fixedly installed on the car door, the door panel at the corresponding installation position of the car door constitutes a limit plate, and a through hole for the limit arm 2 to pass through is provided at this installation position. The diameter of the through hole is smaller than the diameter of the large-diameter section of the guide hole 11, thereby pressing the elastic sleeve 12 tightly in the guide hole 11.

[0037] The limit box is mainly used to place rubber blocks to provide stable support and positioning. There are two installation holes 131 designed on the flange 13 of the limiter, and it can be fixed on the inner door panel through bolts. This design ensures the firm installation of the limit box 1, enabling it to effectively cooperate with the short shaft sleeve 211 and the rubber block to provide continuous frictional force. In order to increase a certain frictional force, the outer diameter of the short shaft sleeve 211 is usually between 1.1 and 1.3 times the diameter of the sleeve hole 121 of the elastic sleeve 12.

[0038] The specific working structure of the present utility model is as follows:

[0039] Door opening:

[0040] The occupant pushes the car door with his hand, and the car door starts to rotate from 0°. The limit box 1 fixed on the car door starts to slide relative to the limit arm 2. The rubber block in the limit box 1 slides on the first short shaft sleeve 211, and the first short shaft sleeve 211 deforms under the action of frictional force. The limit box 1 continues to move forward. When the car door rotates to 15°, the limit box 1 reaches the boundary between the first short shaft sleeve 211 and the second short shaft sleeve 211. Under the action of frictional force, the second short shaft sleeve 211 will deform near the first short shaft sleeve 211 to form a structure similar to a protrusion. Under the action of this structure, the rubber block needs to overcome the resistance from the protrusion to move forward. The car door continues to rotate. When the car door rotates to 20°, while the limit box 1 overcomes the resistance of the protrusion of the second short shaft sleeve 211, it gradually disengages from the contact with the first short shaft sleeve 211 and completely comes into frictional contact with the second short shaft sleeve 211. Subsequently, the first short shaft sleeve 211 is not affected by frictional force and gradually returns to its original state. And so on, the limit box 1 passes over each short shaft sleeve 211 in turn, and each short shaft sleeve 211 has sufficient time to return to its original state, effectively preventing the short shaft sleeve 211 from being permanently deformed due to long-term force deformation, thereby increasing the service life of the short shaft sleeve 211 and reducing costs.

[0041] When the occupant pushes the car door to rotate to 75°, the limit box 1 contacts the end cover 22. This contact marks that the stroke of the car door reaches the maximum position and cannot move outward continuously. This design not only effectively prevents the safety hazards caused by excessive opening of the car door, but also avoids the interference and potential damage between the parts at the connection of the car door, thus enabling the car door to rotate freely within 0° - 75°.

[0042] Car door hovering:

[0043] When the occupant stops pushing the car door and encounters external interferences such as lateral wind and the gravity of the car door, the frictional resistance between the rubber block and the short bushing 211 in the limit box 1 and the deformation resistance of the rubber itself will provide the hovering force to ensure that the car door can reliably maintain the current angle without rotating, thus realizing the car door hovering function.

[0044] The above is only the preferred specific implementation mode of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A door limiter that achieves stepless hovering based on friction, characterized in that, It includes a limit arm (2) hinged to the vehicle body and a limit box (1) installed on the vehicle door and through which the limit arm (2) passes; a long bushing (21) is fixedly sleeved on the outer side of the limit arm (2), and an elastic sleeve (12) is fixedly connected in a guiding hole (11) opened on the limit box (1) for the limit arm (2) to pass through; the long bushing (21) is sleeved in a sleeve hole (121) of the elastic sleeve (12) along with the limit arm (2), and an elastic sliding friction fit is formed between the long bushing (21) and the elastic sleeve (12), and the sliding friction force in the elastic sliding fit is balanced with the thrust or pulling force for opening the vehicle door.

2. The door limiter for achieving stepless hovering based on friction according to claim 1, wherein The long bushing (21) includes a plurality of short bushings (211) with the same structure, and the shape of the shaft hole of each short bushing (211) is the same as the cross-sectional shape of the limit arm (2) at its location.

3. The door stopper for achieving stepless hovering based on friction according to claim 2, characterized in that, The limit arm (2) is in the shape of a two-stage stepped shaft. The large-diameter section of the limit arm (2) is hinged to the vehicle body, and each short bushing (211) is sequentially sleeved on the small-diameter section of the limit arm (2); and an end cover (22) for pressing each short bushing (211) against the shoulder of the limit arm (2) is fixedly connected to the outer end of the small-diameter section of the limit arm (2).

4. The door limiter for achieving stepless hovering based on friction according to claim 3, wherein, A positioning groove (221) into which the outer end of the small-diameter section of the limit arm (2) can be inserted is opened on the end cover (22), and a positioning hole (2211) is penetrated and opened at the bottom of the positioning groove (221); a threaded hole (24) is opened at the outer end of the small-diameter section of the limit arm (2), and the front end of a positioning bolt (2212) passes through the positioning hole (2211) and is threadedly connected to the threaded hole (24) to fix the end cover (22) to the outer end of the small-diameter section of the limit arm (2).

5. A door limiter that achieves stepless hovering based on friction according to any one of claims 1-4, characterized in that, The guiding hole (11) of the limit box (1) is a two-stage stepped through hole, and the aperture of the two-stage stepped through hole gradually decreases along the direction away from the connection between the limit box (1) and the vehicle door; the elastic sleeve (12) is coaxially fixedly connected in the large-aperture section of the guiding hole (11), and a limit plate for pressing the elastic sleeve (12) against the shoulder of the guiding hole (11) is installed at the orifice of the large-aperture section.

6. The door limiter for achieving stepless hovering based on friction according to claim 5, wherein Flanges (13) are formed outwardly on both sides of the connection between the limit box (1) and the vehicle door, and mounting holes (131) through which bolts pass to fixedly install the limit box (1) on the vehicle body are opened on the flanges (13).

7. The door stopper that achieves stepless hovering based on friction according to claim 6, characterized in that, The elastic sleeve (12) is formed by sequentially enclosing four rectangular rubber blocks.

8. A door limiter that achieves stepless hovering based on friction according to claim 4, characterized in that, Each short bushing (211) is made of the same rubber material.

9. A door limiter that achieves stepless hovering based on friction according to claim 7, characterized in that, The outer diameter of the short bushing (211) is between 1.1 and 1.3 times the aperture of the sleeve hole (121) of the elastic sleeve (12).

10. The door limiter for achieving stepless hovering based on friction according to claim 8, characterized in that, The limit arm (2) is hinged to the vehicle body through a hinge shaft (231), and the hinge shaft (231) is hinged to the hinge shaft (231) through the hinge shaft.

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