Compression spring car door limiter

Abstract

The utility model relates to the technical field of automobile door limiting parts, in particular to a compression spring automobile door limiter which comprises installation blocks, a swing arm, a limiting box and a pin roller, the installation blocks are installed on the two sides of an inner cavity of the limiting box, the swing arm penetrates through the limiting box, and the installation blocks are located on the two sides of the swing arm and connected with the swing arm in a sliding mode. Connecting plates are arranged at the bottoms of the mounting blocks, the rollers are rotationally connected with the connecting plates through connecting columns, and a first interval is formed between the highest point or the lowest point of the surface of each roller and the connecting plane of the corresponding connecting plate and the corresponding mounting block. According to the utility model, the anti-pollution capability of the limiter can be improved on the premise of keeping clear gear hand feeling when the vehicle door is opened and closed.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive door limiting parts, and more specifically, to a compression spring door limiter. Background Technology

[0002] As a key component connecting the vehicle body and the door, the door limiter's core function is to achieve door opening positioning and adjust the opening and closing feel through the coordinated action of the swing arm and the mounting block. Traditional structures employ a design where the swing arm and mounting block work together, with the mounting block containing a compression spring that drives the slider. The swing arm forms multi-level limits by contacting the slider through a wave-shaped limiting arm. Existing technologies mainly present two typical structures: spherical sliders use a full-stroke surface contact method, which, while maintaining relatively stable friction, suffers from a vague gear position feel; while needle roller structures improve gear position clarity through line contact design, but exhibit significant durability issues in practical applications.

[0003] Existing needle roller limiters have the following drawbacks in engineering practice: When the needle roller contacts the limit arm, environmental contaminants (including a viscous mixture formed by water vapor, dust, and lubricating grease) can easily infiltrate, causing a layer of contaminant deposits to form in the gap between the needle roller and the mounting block's surface. This viscous deposit hinders the rolling of the needle roller, forcing the originally designed rolling friction to transform into sliding friction. Under this condition, the line contact characteristics of the needle roller structure actually exacerbate the stress concentration of the friction pair, causing a sharp increase in unit contact pressure, ultimately leading to abnormal friction noise and accelerated component wear. Especially in dusty northern regions, this problem shows an accelerated deterioration trend throughout the vehicle's service life, directly resulting in functional degradation of the limiter and an increased rate of complaints about abnormal noises.

[0004] The existing improvements mentioned above are mostly limited to optimizing the sealing structure or improving the lubricant, and therefore have not broken through the physical limitations of the traditional needle roller structure. Currently, how to construct a contact pair with strong anti-contamination capabilities and stable frictional characteristics while ensuring a clear gear shift feel, and avoiding functional degradation and abnormal noise of the limiter, remains a technical bottleneck to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to overcome the limitations of existing door limiters in improving anti-pollution capabilities while ensuring clear gear shift feel, and to provide a compression spring door limiter.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A compression spring door limiter is provided, comprising a mounting block, a swing arm, and a limiting box. The mounting blocks are installed on both sides of the inner cavity of the limiting box. The swing arm passes through the limiting box. The mounting blocks are located on both sides of the swing arm and are slidably connected to the swing arm. The device also includes rollers. A connecting plate is provided at the bottom of each mounting block. The rollers are rotatably connected to the connecting plates through connecting columns. A first distance is provided between the highest or lowest point of the roller surface and the connecting plane of the connecting plate and the mounting block.

[0008] In the operation of the above scheme, when the car door is opened or closed, the swing arm rotates with the door and generates lateral displacement, which drives the mounting block to slide along the swing arm. The roller forms a rotating pair with the connecting plate at the bottom of the mounting block through the connecting posts at both ends, so that the roller can achieve pure rolling motion on the surface of the swing arm. The bottom of the roller and the surface of the swing arm maintain line contact. The line contact between the roller and the swing arm ensures the feel of the door opening and closing. Under this premise, the first gap creates a "storage area" isolated from the roller's movement trajectory. The storage area is set to be appropriately large. When a viscous mixture formed by water vapor, dust, lubricating grease, etc. intrudes, most of the contaminants will be thrown into the storage area by the centrifugal force generated by the roller rolling, rather than accumulating at the contact interface between the roller and the swing arm. By guiding contaminants to non-critical friction areas, the rollers can maintain pure rolling friction motion on the swing arm, eliminating the abnormal noise of sliding friction motion. The entire door opening and closing process not only maintains a clear gear shift feel but also improves the resistance to contamination, preventing functional degradation and abnormal noise of the limiter. At the same time, because the spacing is large enough, after every 10,000 kilometers or 12 months of driving, contaminants can be easily cleaned by simply spraying the mounting block and rollers with a high-pressure water gun. The cleaning method is simple and convenient.

[0009] Furthermore, the first spacing value ranges from greater than or equal to 1.5mm to less than or equal to 5.5mm; theoretically, the larger the spacing, the better, but due to the limitation of the installation space of the car door, the spacing cannot be infinitely large. After testing, an effective spacing range was determined. Within this range, the storage area formed by the spacing can fully accommodate the contaminants thrown in by the rollers, and it is also easy to clean.

[0010] Furthermore, a second gap is provided between the side of the roller and the inner side of the connecting plate, the size of the second gap being between 1.5mm and 3mm; the gap between the side of the roller and the side of the connecting plate provides space for the lubricant to be contained, and avoids abnormal noise caused by friction on the side.

[0011] Furthermore, a raceway is provided on the surface of the swing arm, and protrusions and recesses are periodically arranged on the raceway. The protrusions and recesses abut against the rollers. The rollers roll and move on the raceway, using rolling friction to reduce frictional resistance and avoid abnormal noise.

[0012] Furthermore, the surface where the roller abuts against the protrusion is a hyperboloid, and the surface of the protrusion is a curved surface that fits with the hyperboloid of the roller. Compared to the concave raceway of a ball bearing, the hyperboloid raceway is less prone to accumulating dirt, and the hyperboloid roller that fits with the hyperboloid protrusion is concave, which can appropriately increase the contaminant storage area formed by the first gap, thereby effectively avoiding abnormal noise caused by sliding friction when contaminants come into contact with the roller on the raceway. At the same time, the hyperboloid protrusion can maintain line contact to provide users with an excellent shifting force experience.

[0013] Furthermore, it also includes a compression spring component. The mounting block is provided with a receiving portion, one end of the compression spring component is connected to the receiving portion, and one end of the receiving portion is also provided with a protective wall. The protective wall is arranged around the receiving portion. The compression spring component is the basic component of the limiter. During use, the elastic part of the compression spring component is always kept in a compressed state, applying pressure to the mounting block, thereby pressing the roller tightly against the surface of the raceway. However, during the rolling of the mounting block, the upper and lower parts of the compression spring component may become misaligned. The protective wall can limit the compression spring component in the radial direction to prevent it from becoming misaligned.

[0014] Furthermore, the protective wall is provided with several material reduction grooves, which are evenly distributed around the receiving part. Since the protective wall does not need to be subjected to too much force during operation, in order to save costs, reduce material usage, and reduce weight, several material reduction grooves are provided on the protective wall. The entire protective wall presents a shape in which teeth and grooves are arranged in a circular pattern. The material reduction grooves are evenly distributed, which facilitates the manufacturing of the mounting block, reduces thermal stress, and lowers the manufacturing defect rate.

[0015] Furthermore, a locking head is provided at the end of the compression spring away from the mounting block, and the locking head is fixedly connected to the limiting box; the limiting box is installed on the outside of the entire mounting block, pressing the compression spring inside the limiting box, so that the elastic part of the compression spring is always kept in a compressed state, ensuring the normal operation of the basic function of the limiter.

[0016] Furthermore, it also includes a first mounting component and a second mounting component. The first mounting component is fixedly connected to the limiting box, and the second mounting component is rotatably connected to the end of the swing arm near the mounting block. The first mounting component fixes the limiting box to the car door, while the second mounting component is fixedly mounted on the car body sheet metal. An anti-collision pad is provided at the end of the swing arm away from the second mounting component. When the car door is opened to its maximum opening degree, the mounting block is in contact with the anti-collision pad, which improves durability while ensuring the normal opening and closing of the car door.

[0017] Furthermore, both the mounting block and the roller are made of plastic; both the roller and the mounting block are made of plastic, while the connecting columns on both sides of the roller are made of metal to ensure the structural strength of the rotational connection. Compared with metal, plastic rollers are less likely to produce abnormal noise when rolling on the raceway.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The first gap between the connecting plane of the roller and the connecting plate mounting block forms a contaminant storage area. When a viscous mixture of water vapor, dust, lubricating grease, etc., enters, the contaminants can be thrown into the storage area by the centrifugal force of the roller rolling, instead of accumulating at the contact interface between the roller and the swing arm, thereby avoiding contaminants from hindering the rolling of the roller and causing abnormal noise.

[0020] 2. The raceway has several recesses and protrusions. The hyperboloid protrusions make the raceway less prone to accumulating dirt and grime, thus effectively preventing contaminants from contacting the rollers and causing abnormal noise. At the same time, the raceway with its alternating recesses and protrusions provides users with a better shifting force experience. Attached Figure Description

[0021] Figure 1 A perspective view of a compression spring door limiter;

[0022] Figure 2 A three-dimensional structural diagram of a compression spring door limiter after the limit box has been removed;

[0023] Figure 3 This is a schematic diagram of the internal structure of a compression spring door limiter.

[0024] Figure 4 This is a schematic diagram of the structure of a compression spring component and mounting block assembled in a compression spring door limiter.

[0025] In the attached drawings: 100, mounting block; 110, connecting plate; 130, receiving part; 140, protective wall; 141, material reduction groove; 200, swing arm; 210, raceway; 211, protrusion; 222, recess; 300, roller; 310, connecting column; 400, compression spring; 410, lock head; 500, limit box; 600, first mounting part; 700, second mounting part. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0028] Example 1

[0029] This embodiment is a first embodiment of a compression spring door limiter, such as... Figures 1 to 4 As shown, the device includes a mounting block 100, a swing arm 200, and a limiting box 500. The mounting blocks 100 are installed on both sides of the inner cavity of the limiting box 500. The swing arm 200 passes through the limiting box 500. The mounting blocks 100 are located on both sides of the swing arm 200 and are slidably connected to the swing arm 200. The device also includes rollers 300. Each mounting block 100 has a connecting plate 110 at its bottom. The rollers 300 are rotatably connected to the connecting plates 110 through connecting columns 310. A first gap is provided between the highest or lowest point of the surface of the rollers 300 and the connecting plane of the connecting plate 110 and the mounting block 100.

[0030] The highest or lowest point of the surface of the roller 300 refers to the following: both the roller 300 and the mounting block 100 are provided in two parts. Both rollers 300 are described in the same coordinate reference system. One roller 300 is located below the orthographic projection of the other roller 300 in the height direction. The highest point is the highest point in the height direction of the upper roller 300, and the lowest point is the lowest point in the height direction of the lower roller 300.

[0031] Specifically, a second gap is provided between the side of the roller 300 and the inner side of the connecting plate 110. The size of the second gap is between 1.5mm and 3mm. Theoretically, the larger the gap, the better. However, due to the limitation of the door installation space, the gap cannot be infinitely large. After testing, an effective gap range was determined. Within this range, the storage area formed by the gap can fully accommodate the contaminants thrown in by the roller 300, and it is also easy to clean.

[0032] Specifically, a gap is provided between the side of the roller 300 and the side of the connecting plate 110, with the gap ranging from 1.5mm to 3mm. A second gap is provided between the side of the roller 300 and the side of the connecting plate 110 to provide space for the lubricant and prevent abnormal noise caused by friction on the side.

[0033] The working principle of a compression spring door limiter in this embodiment is as follows:

[0034] The roller 300 forms a rotating pair with the connecting plate 110 at the bottom of the mounting block 100 through the connecting posts 310 at both ends, so that the roller 300 can achieve pure rolling motion on the surface of the swing arm 200. When the car door is opened and closed, the swing arm 200 rotates with the car door and generates lateral displacement, which drives the mounting block 100 to slide along the swing arm 200. When a viscous mixture formed by water vapor, dust, lubricating grease, etc. invades, the contaminants will be thrown into the contaminant storage area formed by the centrifugal force generated by the rolling of the roller 300 into the first gap between the upper surface of the roller 300 and the highest point of the connecting plate 110.

[0035] The beneficial effects of this embodiment are: by guiding contaminants to non-critical friction areas, the roller 300 can maintain pure rolling on the swing arm 200, which improves the anti-contamination ability and avoids functional degradation and abnormal noise of the limiter.

[0036] Example 2

[0037] This embodiment is a second embodiment of a compression spring door limiter, such as... Figures 3 to 4 As shown, the difference from Embodiment 1 is as follows:

[0038] Specifically, a raceway 210 is provided on the surface of the swing arm 200. Protrusions 211 and recesses 222 are periodically arranged on the raceway 210. The protrusions 211 and recesses 222 abut against the roller 300. The roller 300 rolls and moves on the raceway 210, using rolling friction to reduce frictional resistance and avoid abnormal noise.

[0039] Specifically, such as Figure 4As shown, the surface where the roller 300 abuts against the protrusion 211 is a hyperboloid, and the surface of the protrusion 211 is a curved surface that fits with the hyperboloid of the roller 300. Compared with the concave raceway 210 of the ball bearing type, the hyperboloid raceway 210 is less likely to trap dirt, and the hyperboloid roller 300 that fits with the hyperboloid protrusion 211 is concave, which can appropriately increase the contaminant storage area formed by the first gap, thereby effectively avoiding the abnormal noise of sliding friction caused by contaminants contacting the roller 300 on the raceway 210. At the same time, the hyperboloid protrusion 211 can maintain line contact to provide users with an excellent shifting force experience.

[0040] Specifically, it also includes a compression spring 400. The limiter is provided with a receiving part 130. One end of the compression spring 400 is connected to the receiving part 130. A protective wall 140 is also provided at one end of the receiving part 130. The protective wall 140 is arranged around the receiving part 130. The compression spring 400 is the basic component of the limiter. During use, the elastic part of the compression spring 400 is always kept in a compressed state, applying pressure to the mounting block 100, thereby pressing the roller 300 against the surface of the raceway 210. However, during the rolling of the mounting block 100, the upper and lower parts of the compression spring 400 may become misaligned. The protective wall 140 can limit the compression spring 400 in the radial direction to prevent it from becoming misaligned.

[0041] Specifically, the protective wall 140 is provided with several material reduction grooves 141, which are evenly distributed around the receiving part 130. Since the protective wall 140 does not need to be subjected to too much force during operation, in order to save costs, reduce material usage, and reduce weight, several material reduction grooves 141 are provided on the protective wall 140. The entire protective wall 140 presents a shape in which teeth and grooves are arranged in a single ring. The material reduction grooves 141 are evenly distributed, which facilitates the manufacturing of the mounting block 100, reduces thermal stress, and lowers the manufacturing defect rate.

[0042] Specifically, a locking head 410 is provided at the end of the compression spring 400 away from the mounting block 100, and the locking head 410 is fixedly connected to the limit box 500; the limit box 500 is installed on the outside of the entire mounting block 100, pressing the compression spring 400 inside the limit box 500, so that the elastic part of the compression spring 400 is always kept in a compressed state, ensuring the normal operation of the basic function of the limiter.

[0043] The working principle of a compression spring door limiter in this embodiment is as follows:

[0044] When the car door opens and closes, the swing arm 200 rotates with the door, causing the mounting block 100 to slide along the swing arm 200. The roller 300 rolls on the pipe. When the roller 300 slides from the recess 222 to the protrusion 211, the protrusion 211 squeezes and compresses the spring of the spring member 400, causing the spring to be further compressed. The spring pressure increases, and the frictional resistance between the roller 300 and the raceway 210 increases accordingly, thus increasing the resistance to opening and closing the car door. When the roller 300 slides from the protrusion 211 to the recess 222, the frictional resistance decreases in the opposite direction, thus reducing the resistance to opening and closing the car door. The resistance changes drastically throughout the sliding process, and the user will feel a strong sense of shifting gears.

[0045] The beneficial effects of this embodiment are: by arranging the protrusions 211 and the recesses 222, the user's experience of shifting gears when opening and closing the car door is effectively improved.

[0046] Example 3

[0047] This embodiment is a third embodiment of a compression spring door limiter, such as... Figure 3 As shown, the difference from Embodiment 1 is as follows:

[0048] Furthermore, it also includes a first mounting component 600 and a second mounting component 700. The first mounting component 600 is fixedly connected to the limiting box 500, and the second mounting component 700 is rotatably connected to the end of the swing arm 200 near the mounting block 100. The first mounting component 600 fixes the limiting box 500 to the car door, while the second mounting component 700 is fixedly mounted on the car body sheet metal. The swing arm 200 has an anti-collision pad at one end of the second mounting component. When the car door is opened to its maximum opening degree, the mounting block 100 also comes into contact with the anti-collision pad, which improves durability while ensuring the normal opening and closing of the car door.

[0049] Furthermore, both the mounting block 100 and the roller 300 are made of plastic; while the connecting posts 310 on both sides of the roller 300 are made of metal to ensure the structural strength of the rotational connection. Compared with metal, the plastic roller 300 is less likely to produce abnormal noise when rolling on the raceway 210.

[0050] The working principle of a compression spring door limiter in this embodiment is as follows:

[0051] During installation, the second mounting piece 700 is fixed to the body sheet metal, and the first mounting piece 600 is fixed to the door, so that the entire limiting box 500 is fixed to the door. When the door is opened or closed, the entire limiting box 500 can slide relative to the swing arm 200.

[0052] The beneficial effects of this embodiment are: both the mounting block 100 and the roller 300 are made of plastic. Since the surface of plastic is softer, when there are contaminants on the raceway 210, plastic is less likely to produce abnormal noise when rolling on the raceway 210 compared to metal.

[0053] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A compression spring door limiter, comprising mounting blocks (100), a swing arm (200), and a limiting box (500), wherein mounting blocks (100) are mounted on both sides of the inner cavity of the limiting box (500), the swing arm (200) passes through the limiting box (500), and the mounting blocks (100) are located on both sides of the swing arm (200) and slidably connected to the swing arm (200), characterized in that, It also includes rollers (300), and each of the mounting blocks (100) is provided with a connecting plate (110) at its bottom. The rollers (300) are rotatably connected to the connecting plates (110) through connecting columns (310). A first gap is provided between the highest or lowest point of the surface of the rollers (300) and the connecting plane of the connecting plate (110) and the mounting block (100).

2. The compression spring door limiter according to claim 1, characterized in that, The first spacing value ranges from greater than or equal to 1.5 mm to less than or equal to 5.5 mm.

3. A compression spring door limiter according to claim 1, characterized in that, A second gap is provided between the side of the roller (300) and the inner side of the connecting plate (110), the size of the second gap being between 1.5 mm and 3 mm.

4. A compression spring door limiter according to claim 1, characterized in that, The surface of the swing arm (200) is provided with a raceway (210), and the raceway (210) is provided with protrusions (211) and recesses (222) arranged periodically, and the protrusions (211) and the recesses (222) abut against the roller (300).

5. A compression spring door limiter according to claim 4, characterized in that, The surface of the roller (300) that abuts against the protrusion (211) is a hyperboloid, and the surface of the protrusion (211) is a curved surface that fits against the hyperboloid of the roller (300).

6. A compression spring door limiter according to claim 1, characterized in that, It also includes a compression spring (400), the mounting block (100) is provided with a receiving part (130), one end of the compression spring (400) is connected to the receiving part (130), and one end of the receiving part (130) is also provided with a protective wall (140), the protective wall (140) is provided around the receiving part (130).

7. A compression spring door limiter according to claim 6, characterized in that, The protective wall (140) is provided with a plurality of material reduction grooves (141), which are evenly distributed around the receiving part (130).

8. A compression spring door limiter according to claim 6, characterized in that, The compression spring (400) is provided with a lock head (410) at one end away from the mounting block (100), and the lock head (410) is fixedly connected to the limiting box (500).

9. A compression spring door limiter according to claim 1, characterized in that, It also includes a first mounting component (600) and a second mounting component (700), the first mounting component (600) being fixedly connected to the limiting box (500), and the second mounting component (700) being rotatably connected to one end of the swing arm (200) near the mounting block (100).

10. A compression spring door limiter according to any one of claims 1-7, characterized in that, Both the mounting block (100) and the roller (300) are made of plastic.

Images