A door check

Abstract

The utility model provides a kind of car door stopper, it is related to stopper field.The car door stopper includes vehicle body support, screw rod, power device, car door support and hinged component.The first end of screw rod is provided with the first hinged hole along the first radial extension of screw rod and the second hinged hole along the second radial extension of screw rod, first hinged hole and second hinged hole are through;Second radial is perpendicular to first radial;Power device is sleeved on the outside of screw rod, and can be moved along the length direction of screw rod;And, first hinged axle and second hinged axle, first hinged axle is arranged in first hinged hole and is fixed to vehicle body support;Second hinged axle is movably arranged in second hinged hole and is movably sleeved on the outside of first hinged axle.The utility model is cooperatively designed by first hinged axle and second hinged axle, which not only avoids the problem of insufficient degree of freedom of traditional single hinged structure, but also overcomes the defect of excessive degree of freedom of ball hinged structure, so that the opening and closing process of car door is more stable and smooth.

Description

Technical Field

[0001] This utility model belongs to the technical field of limiters, and in particular relates to a car door limiter. Background Technology

[0002] Door limiters are key components for controlling the opening and closing of vehicle doors. For vehicles equipped with sliding side doors, the movement of the door relative to the vehicle body includes not only movement along the length of the vehicle, but also minute displacements relative to other directions of the vehicle body.

[0003] In existing technologies, the following methods are typically used to accommodate minor displacements of the car door in other directions. For example, some door limiters use a single hinge structure to connect to the car body. While this structure allows for minor lateral movement of the door relative to the car body, assembly errors during installation can cause the door to jam or become stuck during opening or closing due to its limited freedom of movement. Another example is the use of a single ball joint connection. While this structure allows for minor adjustments in multiple directions, its excessive freedom of movement can cause the door to wobble during opening and closing, leading to noise and potentially accelerating wear on the door and related components. Therefore, existing door limiters are not very user-friendly for door opening and closing. Utility Model Content

[0004] In view of this, the present invention provides a door limiter, which aims to improve the adaptability of the door limiter to the opening and closing of the door.

[0005] The technical solution of this utility model is implemented as follows:

[0006] This utility model provides a door limiter, including a vehicle body bracket for connection to a vehicle body; a lead screw having a first end, a first radial direction, and a second radial direction, the first end having a first hinge hole extending along the first radial direction and a second hinge hole extending along the second radial direction, the first hinge hole and the second hinge hole intersecting; the second radial direction being perpendicular to the first radial direction; a power device sleeved on the outside of the lead screw and capable of moving along the length direction of the lead screw to switch between a state close to and far from the first end; a door bracket connected to the power device, the door bracket being for connection to a vehicle door; and a hinge assembly including a first hinge shaft and a second hinge shaft, the first hinge shaft passing through the first hinge hole and fixed to the vehicle body bracket; the second hinge shaft movably passing through the second hinge hole and movably sleeved on the outside of the first hinge shaft.

[0007] In one embodiment, the inner wall of the second hinge hole is provided with a limiting groove extending along the second radial direction, and the outer wall of the second hinge shaft is provided with a limiting protrusion extending along the second radial direction, the limiting protrusion extending into the limiting groove; the cross-sectional area of ​​the limiting protrusion is smaller than the cross-sectional area of ​​the limiting groove.

[0008] In one embodiment, in the first radial direction, there is a gap between the limiting protrusion and the inner wall of the limiting groove; in the length direction of the lead screw, the limiting protrusion has a protrusion height relative to the second hinge shaft; the gap is less than or equal to twice the protrusion height and greater than or equal to half the protrusion height.

[0009] In one embodiment, the edge of the limiting groove facing the opening of the second hinge hole is formed with an arc surface, and the curvature of the arc surface is adapted to the outer circular wall of the second hinge shaft.

[0010] In one embodiment, the second hinge hole is configured to be open at one end facing the door and closed at the other end away from the door.

[0011] In one embodiment, the power unit includes: a gearbox having an end cover hinged to the door bracket; a transmission assembly and a motor interconnected and both disposed within the gearbox; wherein the lead screw has a second end opposite to the first end in the length direction, the second end passing through the end cover and extending into the gearbox; the transmission assembly is sleeved on the outside of the second end; the motor drives the transmission assembly to rotate, thereby moving the transmission assembly in the length direction of the lead screw, and driving the gearbox, the motor, and the door bracket to move along the length direction.

[0012] In one embodiment, the end cap is provided with a hinge hole; the hinge assembly further includes a screw connector; the screw connector is screwed to the door bracket and extends into the hinge hole; the end cap is rotatable relative to the screw connector.

[0013] In one embodiment, the transmission assembly includes a first transmission gear and a second transmission gear that mesh with each other, the first transmission gear being sleeved on the outside of the second end, and the second transmission gear being driven and connected to the motor.

[0014] In one embodiment, the transmission assembly further includes a first planetary module and a second planetary module, wherein the sun gear of the first planetary module is connected to the output shaft of the motor, the planet carrier of the first planetary module is connected to the sun gear of the second planetary module, and the planet carrier of the second planetary module is connected to the wheel hub of the second transmission gear.

[0015] In one embodiment, a circuit board is also included, disposed within the gearbox.

[0016] This utility model provides a door limiter, which includes a vehicle body bracket, a lead screw, a power unit, a door bracket, and a hinge assembly. The vehicle body bracket is used to connect to the vehicle body; the lead screw has a first end, with a first hinge hole extending along a first radial direction and a second hinge hole extending along a second radial direction, the first and second hinge holes intersecting; the second radial direction is perpendicular to the first radial direction; the power unit is sleeved on the outside of the lead screw and can move along the length of the lead screw to switch between a state close to and far from the first end; the door bracket is connected to the power unit and is used to connect to the vehicle door; and the hinge assembly includes a first hinge shaft and a second hinge shaft, the first hinge shaft passing through the first hinge hole and fixed to the vehicle body bracket; the second hinge shaft movably passing through the second hinge hole and movably sleeved outside the first hinge shaft. This utility model, through the cooperative design of the first and second hinge shafts, achieves multi-directional freedom adjustment of the vehicle door. When the door experiences slight displacement during opening and closing, the second hinge shaft can rotate adaptively within the second hinge hole, while the first hinge shaft can also rotate accordingly within its own hinge area. This effectively absorbs assembly errors and stresses incurred during operation. This dual-axis hinge structure avoids the insufficient degrees of freedom inherent in traditional single-hingle structures and overcomes the excessive freedom of ball joint structures, resulting in a smoother and more stable door opening and closing process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall appearance of an embodiment of the door limiter provided by this utility model;

[0019] Figure 2 for Figure 1 Overall sectional view;

[0020] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 for Figure 1 A cross-sectional view of the first end of the lead screw;

[0022] Figure 5 for Figure 1A schematic diagram showing the intersection of the first and second hinge axes.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Vehicle body bracket; 2. Lead screw; 21. First end; 211. First hinge hole; 212. Second hinge hole; 213. Limiting groove; 22. Second end; 3. Power unit; 31. Gearbox; 311. End cover; 32. Transmission assembly; 321. First transmission gear; 322. Second transmission gear; 33. Motor; 4. Door bracket; 6. Hinge assembly; 61. First hinge shaft; 62. Second hinge shaft; 63. Limiting protrusion; 64. Screw connector; 7. Circuit board. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0026] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0027] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are 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 with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0028] Door limiters are key components for controlling the opening and closing of vehicle doors. For vehicles equipped with sliding side doors, the movement of the door relative to the vehicle body includes not only movement along the length of the vehicle, but also minute displacements relative to other directions of the vehicle body.

[0029] In existing technologies, the following methods are typically used to accommodate minor displacements of the car door in other directions. For example, some door limiters use a single hinge structure to connect to the car body. While this structure allows for minor lateral movement of the door relative to the car body, assembly errors during installation can cause the door to jam or become stuck during opening or closing due to its limited freedom of movement. Another example is the use of a single ball joint connection. While this structure allows for minor adjustments in multiple directions, its excessive freedom of movement can cause the door to wobble during opening and closing, leading to noise and potentially accelerating wear on the door and related components. Therefore, existing door limiters are not very user-friendly for door opening and closing.

[0030] In view of this, the present invention provides a door limiter, which aims to improve the adaptability of the door limiter to the opening and closing of the door.

[0031] The door limiter provided in this embodiment is suitable for automobiles where the door is moved along the length of the vehicle to open and close. In other words, this door limiter is suitable for automobiles with side-sliding doors. The door limiter can be installed in the door hinge area, inside the side panel sheet metal, inside the trim strip, etc., depending on the shape of the vehicle and the available installation space.

[0032] Please see Figure 1 and Figure 2 The door limiter includes a body bracket 1, a lead screw 2, a power unit 3, and a door bracket 4. The body bracket 1 connects to the vehicle body; the specific structure of the body bracket is not limited in this invention, as long as it can securely connect to the vehicle body. In practice, the body bracket 1 can be made of high-strength alloy material to ensure a stable and reliable connection with the vehicle body. The lead screw 2 has connecting and guiding functions; during installation, the length direction of the lead screw 2 is consistent with the length direction of the vehicle. The lead screw 2 has a first end 21, and the power unit 3 is sleeved on the outside of the lead screw 2 and can move along the length direction of the lead screw 2 to switch between being close to and away from the first end 21. The power unit 3 can be equipped with a servo motor, a reduction mechanism, and an encoder to achieve closed-loop control and improve the accuracy of the door opening and closing position. The door bracket 4 is connected to the power unit 3 and is used to connect to the door. Specifically, the body bracket 1 and the door are connected by high-strength bolts to prevent loosening during long-term use.

[0033] Please see Figure 3 , Figure 4 and Figure 5To accommodate minor movements of the door in directions other than its length during opening and closing, the door limiter is also equipped with a hinge assembly 6. This hinge assembly 6 includes a first hinge shaft 61 and a second hinge shaft 62. Correspondingly, the first end 21 of the lead screw 2 has a first hinge hole 211 and a second hinge hole 212. The specific arrangement of these two hinge shafts and two hinge holes is as follows: the first hinge hole 211 extends along the first radial direction of the lead screw 2, and the second hinge hole 212 extends along the second radial direction of the lead screw 2; the first hinge hole 211 and the second hinge hole 212 intersect each other, and the first and second radial directions are perpendicular to each other. Furthermore, the first hinge shaft 61 passes through the first hinge hole 211, and the second hinge shaft 62 movably passes through the second hinge hole 212. The second hinge shaft 62 movably passing through the second hinge hole 212 can be understood as follows: when no external force is applied to the second hinge shaft 62, it can be stably held within the second hinge hole 212; while under the application of external force, the second hinge shaft 62 can rotate flexibly within the hinge hole. Simultaneously, the first hinge shaft 61 is fixed to the vehicle body bracket 1, and the second hinge shaft 62 is movably sleeved outside the first hinge shaft 61; that is, the first hinge shaft 61 movably passes through the second hinge shaft 62. When no external force is applied to the first hinge shaft 61, it can be stably held within the first hinge shaft 61; while under the application of external force, the first hinge shaft 61 can rotate flexibly within the first hinge shaft 61.

[0034] In the specific implementation process, the gap between the second hinge shaft 62 and the second hinge hole 212 can be calculated and adjusted to ensure rotational flexibility while avoiding wobbling caused by excessive gap. Meanwhile, the first hinge shaft 61 and the second hinge shaft 62 can be made of different materials. The first hinge shaft 61 can be made of high-hardness alloy steel to ensure structural strength, while the second hinge shaft 62 can be made of self-lubricating composite materials (such as plastic or rubber) with a certain coefficient of friction, which can improve the smoothness of door opening and closing and maintain the stability of the door in the open or closed state.

[0035] It's understandable that during the installation of door limiters, factors such as installation errors and vehicle body deformation may occur. This hinged design effectively compensates for these assembly errors. Furthermore, during the opening and closing of the door, the door will cause the door limiter to shift outwards or other directions. Therefore, the door limiter needs to compensate for these assembly errors and shifting tendencies.

[0036] The opening and closing process of the car door is as follows: After the power unit 3 is started, the motor drives the transmission assembly 32 to move the gearbox 31 along the length of the lead screw 2, thereby pulling the door bracket 4 and the connected door to complete the opening and closing action. During this process, the hinge assembly 6 allows the door to produce a small displacement compensation in the radial direction of the lead screw 2. The coordinated rotation of the first hinge shaft 61 and the second hinge shaft 62 effectively absorbs the stress caused by assembly errors and avoids common jamming phenomena.

[0037] The door limiter provided in this embodiment includes a body bracket 1, a lead screw 2, a power unit 3, a door bracket 4, and a hinge assembly 6. The body bracket 1 is used to connect to a vehicle body; the lead screw 2 has a first end 21, which is provided with a first hinge hole 211 extending along a first radial direction and a second hinge hole 212 extending along a second radial direction, the first hinge hole 211 and the second hinge hole 212 intersecting each other; the second radial direction is perpendicular to the first radial direction; the power unit 3 is sleeved on the outside of the lead screw 2 and can move along the length direction of the lead screw 2 to switch between states close to and far from the first end 21; the door bracket 4 is connected to the power unit 3 and is used to connect to a door; and the hinge assembly 6 includes a first hinge shaft 61 and a second hinge shaft 62, the first hinge shaft 61 passing through the first hinge hole 211 and fixed to the body bracket 1; the second hinge shaft 62 movably passing through the second hinge hole 212 and movably sleeved outside the first hinge shaft 61. This embodiment of the invention achieves multi-directional degree of freedom adjustment of the car door through the cooperative design of the first hinge shaft 61 and the second hinge shaft 62. When the car door experiences slight displacement during opening and closing, the second hinge shaft 62 can adaptively rotate within the second hinge hole 212, while the first hinge shaft 61 can also rotate accordingly within its own hinge hole, thereby effectively absorbing assembly errors and stress during operation. This dual-axis hinge structure avoids the problem of insufficient degree of freedom in traditional single-hingle structures and overcomes the defect of excessive freedom in ball joint structures, making the opening and closing process of the car door smoother and more stable.

[0038] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 5 To improve structural stability, the door limiter is equipped with a corresponding limiting structure. Specifically, the inner wall of the second hinge hole 212 is provided with a limiting groove 213 extending along the second radial direction, and the outer wall of the second hinge shaft 62 is provided with a limiting protrusion 63 extending along the second radial direction, the limiting protrusion 63 extending into the limiting groove 213; the cross-sectional area of ​​the limiting protrusion 63 is smaller than the cross-sectional area of ​​the limiting groove 213. With this configuration, during the rotation of the second hinge shaft 62, the cooperation between the limiting protrusion 63 and the limiting groove 213 ensures the rotational freedom of the lead screw 2 relative to the second hinge shaft 62, while avoiding excessive rotation angle, thus improving structural stability.

[0039] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 5 To ensure that the rotation angle of the lead screw 2 relative to the second hinge shaft 62 is within a reasonable range, the structure between the limiting protrusion 63 and the limiting groove 213 is appropriately configured. Specifically, in the first radial direction, there is a gap between the limiting protrusion 63 and the inner wall of the limiting groove 213; in the length direction of the lead screw 2, the limiting protrusion 63 has a protrusion height relative to the second hinge shaft 62; the gap is less than or equal to twice the protrusion height and greater than or equal to half the protrusion height. This allows the rotatable angle of the lead screw 2 relative to the second hinge shaft 62 to be approximately between 15° and 30°, ensuring sufficient adjustment space while preventing structural instability caused by excessive rotation.

[0040] In some embodiments, please refer to Figure 3 , Figure 4 and Figure 5 To prevent damage to the groove of the limiting groove 213 caused by collision between the second hinge shaft 62 and the opening of the limiting groove 213 during the rotation of the lead screw 2 around the second hinge shaft 62, the opening of the limiting groove 213 is arc-shaped. Specifically, the edge of the limiting groove 213 facing the opening of the second hinge hole 212 has an arc surface, and the curvature of the arc surface is adapted to the outer circular wall of the second hinge shaft 62. In this way, the contact between the limiting groove 213 and the second hinge shaft 62 is an arc-shaped surface contact. This design significantly reduces local stress concentration and extends the service life of the limiting groove 213. At the same time, the arc surface contact can also effectively reduce friction noise during rotation and improve the quietness of the door opening and closing.

[0041] In some embodiments, please refer to Figure 1 and Figure 4 The second hinge hole 212 is open at one end facing the door and closed at the other end away from the door. If the side away from the door is defined as the outer side and the side closer to the door is defined as the inner side, then the open end of the second hinge hole 212 faces inward and the closed end faces outward.

[0042] In practical implementation, a dustproof sealing ring can be installed at the open end of the second hinge hole 212, which can maintain rotational flexibility while blocking external contaminants. The closed end can integrate a lubricating grease storage cavity, which continuously provides lubrication to the hinge surface through capillary action, significantly extending the service life of the components.

[0043] This embodiment of the invention, by having one end of the second hinge hole 212 closed and the other end open, facilitates the installation and maintenance of the second hinge shaft 62 and effectively prevents dust and foreign objects from entering the hinge hole. The closed end design also makes the first end 21 of the lead screw 2 appear flatter, improving its aesthetics.

[0044] In some embodiments, please refer to Figure 2 The power unit 3 includes a gearbox 31, a transmission assembly 32 disposed within the gearbox 31, and a motor. The motor provides the power source, and the transmission assembly 32 is connected to the motor to convert the rotational motion provided by the motor into linear motion. The lead screw 2 has a second end 22 opposite to the first end 21 in the length direction. The second end 22 passes through the end cover 311 and extends into the gearbox 31. The transmission assembly 32 is sleeved on the outside of the second end 22. The motor drives the transmission assembly 32 to rotate, so that the transmission assembly 32 moves in the length direction of the lead screw 2, and drives the gearbox 31, the motor, and the door bracket 4 to move along the length direction.

[0045] The specific process of opening and closing the car door is as follows: After the motor starts, the rotational motion is converted into linear motion through the transmission component 32, driving the gearbox 31 to move axially along the lead screw 2. During this process, the door bracket 4 moves synchronously with the power unit 3, realizing the smooth opening and closing of the car door. At the same time, the hinge component 6 automatically compensates for displacement deviations in all directions during the movement of the car door. The synergistic effect of the first hinge shaft 61 and the second hinge shaft 62 ensures that the car door always stays on the optimal movement trajectory, thereby improving the smoothness and reliability of the door opening and closing.

[0046] Furthermore, to make the overall structure of the door limiter more compact, the door bracket 4 is directly connected to the end cover 311 of the gearbox 31. That is, the end cover 311 of the gearbox 31 not only has a sealing and protective function but also serves as the mounting base for the door bracket 4. This integrated design reduces the number of parts, lowers assembly complexity, and improves the rigidity and stability of the overall structure. The end cover 311 of the gearbox 31 can be made of high-strength aluminum alloy casting, achieving lightweight while ensuring structural strength.

[0047] In some embodiments, please refer to Figure 2 A rubber sleeve 8 is provided on the outer side of the lead screw 2. One end of the rubber sleeve 8 is connected to the first end 21 of the lead screw 2, and the other end is connected to the gearbox 31. The rubber sleeve 8 is wavy in shape along its length. The wavy design of the rubber sleeve 8 gives it good elasticity and cushioning performance, which can effectively absorb vibration and impact during the opening and closing of the door.

[0048] In some embodiments, please refer to Figure 2To improve the structural adaptability of the door limiter, the connection between the door bracket 4 and the end cover 311 of the gearbox 31 is also hinged. Specifically, the end cover 311 is provided with a hinge hole; the hinge assembly 6 also includes a screw connector 64; the screw connector 64 is screwed onto the door bracket 4 and extends into the hinge hole; the end cover 311 is rotatable relative to the screw connector 64. Thus, during the opening and closing of the door, this hinged connection can further absorb the outward or inward displacement deviation of the door, as well as assembly deviations.

[0049] In practical implementation, the screw of the bolted connector 64 includes a threaded section and a smooth section. The threaded section is used for fixed connection with the door bracket 4, while the smooth section serves as the rotation axis. The bolted connector 64 can be made of high-strength stainless steel, and its threaded portion and the door bracket 4 are designed to prevent loosening during long-term use. A wear-resistant bushing can be installed in the hinge hole of the end cap 311, which ensures smooth rotation and reduces direct friction between metals.

[0050] In some embodiments, please refer to Figure 2 The transmission assembly 32 includes a first transmission gear 321 and a second transmission gear 322 that mesh with each other. The first transmission gear 321 is sleeved on the outside of the second end 22, and the second transmission gear 322 is driven and connected to the motor. In this way, the motor drives the first transmission gear 321 to rotate through the second transmission gear 322, thereby driving the entire transmission system to operate smoothly.

[0051] In practical implementation, both the first transmission gear 321 and the second transmission gear 322 are helical gears, with the core of the first transmission gear 321 screwed to the outside of the lead screw 2. This helical gear design significantly reduces transmission noise while improving the overlap of gear meshing, ensuring smooth power transmission. The connection between the second transmission gear 322 and the motor output shaft, or the connection between the second transmission gear 322 and the reduction mechanism connected to the motor output shaft, uses a spline connection to improve connection stability.

[0052] In some embodiments, please refer to Figure 2 To provide greater torque for opening and closing the doors, a two-stage reduction system is employed. Specifically, the transmission assembly 32 further includes a first planetary module and a second planetary module. The sun gear of the first planetary module is connected to the output shaft of the motor, the planet carrier of the first planetary module is connected to the sun gear of the second planetary module, and the planet carrier of the second planetary module is connected to the wheel hub of the second transmission gear 322. The planetary module is a reduction mechanism comprising a sun gear, planet gears, a planet carrier, and an external gear ring.

[0053] In this way, the high speed output of the motor is converted into high torque output through a two-stage planetary reduction mechanism, effectively meeting the power requirements for opening and closing the car door. The first-stage planetary module initially reduces the speed, and the second-stage planetary module further amplifies the torque, finally transmitting the power to the first transmission gear 321 through the second transmission gear 322. This multi-stage reduction design not only ensures the smoothness of power output but also significantly improves transmission efficiency, making the door opening and closing action more reliable.

[0054] In some embodiments, please refer to Figure 2 The door limiter also includes a circuit board 7. The circuit board 7 is located inside the gearbox 31.

[0055] In practical implementation, circuit board 7 integrates a control module and a sensor signal processing unit, enabling real-time monitoring of parameters such as position, speed, and torque during the opening and closing of the door. Precise control of the motor through a preset program ensures the door can smoothly stop at any position. Circuit board 7 also features fault diagnosis; when abnormal resistance or positional deviation is detected, a protection mechanism is automatically triggered to prevent equipment damage.

[0056] This embodiment of the invention directly mounts the circuit board 7 inside the gearbox 31. This integrated design not only saves installation space but also improves the stability of signal transmission. The circuit board 7 is connected to components such as the motor and encoder via internal wiring, avoiding interference and wear risks from external cables.

[0057] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A door limiter, characterized in that, include: Body bracket, used to connect to the vehicle body; A lead screw has a first end, a first radial direction, and a second radial direction. The first end is provided with a first hinge hole extending along the first radial direction and a second hinge hole extending along the second radial direction, and the first hinge hole and the second hinge hole intersect each other. The second radial direction is perpendicular to the first radial direction. A power unit is sleeved on the outside of the lead screw and can move along the length of the lead screw to switch between being close to and far from the first end; A door bracket, connected to the power unit, the door bracket being used to connect to a door; and... The hinge assembly includes a first hinge shaft and a second hinge shaft. The first hinge shaft passes through the first hinge hole and is fixed to the vehicle body bracket. The second hinge shaft movably passes through the second hinge hole and is movably sleeved outside the first hinge shaft.

2. The door limiter according to claim 1, characterized in that, The inner wall of the second hinge hole is provided with a limiting groove extending along the second radial direction, and the outer wall of the second hinge shaft is provided with a limiting protrusion extending along the second radial direction. The limiting protrusion extends into the limiting groove. The cross-sectional area of ​​the limiting protrusion is smaller than the cross-sectional area of ​​the limiting groove.

3. The door limiter according to claim 2, characterized in that, In the first radial direction, there is a gap between the limiting protrusion and the inner wall of the limiting groove; in the length direction of the lead screw, the limiting protrusion has a protrusion height relative to the second hinge shaft; The spacing is less than or equal to twice the height of the protrusion, and greater than or equal to half the height of the protrusion.

4. The door limiter according to claim 2, characterized in that, The edge of the limiting groove facing the opening of the second hinge hole has an arc surface, and the curvature of the arc surface is adapted to the outer circular wall of the second hinge shaft.

5. The door limiter according to claim 1, characterized in that, The second hinge hole is configured to be open at one end facing the door and closed at the other end away from the door.

6. The door limiter according to claim 1, characterized in that, The power unit includes: A gearbox having an end cover hinged to the door bracket; The transmission components and the motor are interconnected and are both housed within the gearbox; The lead screw has a second end opposite to the first end in the length direction, the second end passing through the end cover and extending into the gearbox; the transmission assembly is sleeved on the outside of the second end; the motor drives the transmission assembly to rotate, so that the transmission assembly moves in the length direction of the lead screw, and drives the gearbox, the motor and the door bracket to move along the length direction.

7. The door limiter according to claim 6, characterized in that, The end cap is provided with a hinge hole; the hinge assembly further includes a screw connector; the screw connector is screwed to the door bracket and extends into the hinge hole; the end cap is rotatable relative to the screw connector.

8. The door limiter according to claim 6, characterized in that, The transmission assembly includes a first transmission gear and a second transmission gear that mesh with each other. The first transmission gear is sleeved on the outside of the second end, and the second transmission gear is driven and connected to the motor.

9. The door limiter according to claim 8, characterized in that, The transmission assembly further includes a first planetary module and a second planetary module. The sun gear of the first planetary module is connected to the output shaft of the motor, the planet carrier of the first planetary module is connected to the sun gear of the second planetary module, and the planet carrier of the second planetary module is connected to the wheel core of the second transmission gear.

10. The door limiter according to claim 6, characterized in that, It also includes a circuit board, which is disposed inside the gearbox.

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