Safety protection device of automobile steering wheel

Abstract

The invention discloses a safety protection device of an automobile steering wheel, relates to the technical field of safety protection of automobile steering wheels, and aims to solve the problems that a supporting column of an existing steering wheel only uses a section of spring for buffering, the elastic coefficient of the supporting column is fixed, if the elastic coefficient of the supporting column is large, the supporting column is difficult to contract for energy storage, and the overhard spring still causes certain impact to a driver. In order to solve the problems that in the prior art, when a steering wheel is collided violently, if the elastic coefficient of a spring is small, energy capable of being absorbed and buffered by the spring is limited, and the buffering effect is insufficient when the steering wheel is collided violently, three layers of buffering protection mechanisms are arranged in a steering wheel supporting column in total, and the first layer of spring is small in elastic coefficient and can deform in time for buffering; the second layer enables the steering wheel to be bent and buffered in the direction in which a driver puts over, the contact area between the steering wheel and the driver is increased, hurt to arms of the driver is further reduced, the springs with the large elastic coefficient are arranged on the bottommost layer, and too large impact force can be conveniently absorbed and buffered.

Description

Technical Field

[0001] The invention relates to the field of automobile steering wheel safety protection, in particular to a safety protection device for an automobile steering wheel. Background Art

[0002] When a vehicle is involved in a collision, whether it is a head-on collision, a side collision or other types of collisions, the driver will move forward or in other directions due to inertia. Without safety protection devices, the driver's head, chest, neck and other important parts are likely to directly hit the steering wheel, causing serious injuries such as skull fractures, brain injuries, chest rib fractures, heart and lung contusions, neck sprains or fractures, etc. Safety protection devices can buffer the impact between the driver and the steering wheel at the moment of collision, greatly reducing the severity of injuries, and even avoiding injuries in some low-intensity collisions.

[0003] In this regard, the utility model, publication number: CN209112246U, relates to the technical field of safety protection devices, and discloses a car steering wheel safety protection device, including a connecting tube, a rotating ball is fixedly installed on the top of the connecting tube, a slide groove is opened inside the slide groove, and a limit block is movably sleeved inside the slide groove. There are two limit blocks, and the two limit blocks are symmetrical to each other with the vertical center line of the rotating ball as the symmetry axis. The automobile steering wheel safety protection device, through the cooperation between the arc tube, the arc column, the block and the sliding ball, when the car brakes in time, the driver's body still moves forward due to the penetration force, and then the body touches the automobile adjustment plate. Since the arc column on the right side of the bottom of the automobile adjustment plate is connected with the arc tube, and the interior of the automobile adjustment plate is equipped with an anti-collision pad, it partially buffers the driver's body, thereby reducing the impact on the driver's body, thereby protecting the driver's body; in this regard, Publication No.: CN103318246B The invention provides a car steering wheel safety protection device, which is jointly composed of a circular steering wheel and a columnar steering column in the form of deflection, compression and deformation buffering. In the event of a frontal collision, the steering wheel contacts a person, and the eccentric self-locking device absorbs the impact energy by rotating and pressing down and wedging the elastic metal plate while adjusting the angle of the disk surface, thereby increasing the contact area between the steering wheel and the human body and reducing the impact pressure. Most of the energy generated by the impact is transmitted to the steering column, and the upper rotating shaft of the steering column is compressed to absorb energy and deflect forward. When the human head moves forward due to the large inertia and contacts the upper edge of the steering wheel, the elastic disk edge buffers the deformation, reducing the possibility of head and neck injuries. Finally, the spherical pad transfers the impact energy to the cylindrical coil spring to complete the compression energy absorption process of the upper rotating shaft. The present invention is safe and reliable, easy to manufacture and maintain, reusable, and can be widely used in general passenger vehicles; nowadays, there are still support columns of steering wheels that use springs to buffer the impact force of the driver hitting the steering wheel, but only one section of the spring is used for buffering, and its elastic coefficient is fixed. If its elastic coefficient is large, when the driver just hits the steering wheel, it needs a large force to shrink, and the hardness of the spring itself will still cause a certain impact on the driver, but if the spring elastic coefficient is small, the energy it can absorb and cache is also small, and when it is hit violently, its buffering effect is limited.

[0004] In view of the above problems, a safety protection device for a car steering wheel is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide a safety protection device for a car steering wheel, which solves the problem that the elastic coefficient of the buffer spring of the steering wheel support column in the background technology is fixed, and when the impact force is small or large, it may still cause damage to the driver due to insufficient energy absorption.

[0006] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a safety protection device for a car steering wheel, comprising a steering wheel support column, a primary buffer spring fixedly connected to the bottom of the steering wheel support column, and a bending buffer assembly is installed at the bottom of the primary buffer spring, the bending buffer assembly comprises a first extrusion block, the first extrusion block is fixedly connected to the bottom end of the primary buffer spring, and a displacement buffer block is slidably connected to the bottom of the first extrusion block, and a second extrusion block is slidably connected to the bottom of the displacement buffer block, and a secondary buffer spring is fixedly connected to the bottom of the second extrusion block, the outside of the steering wheel support column is slidably connected to a support column sleeve assembly, and the support column sleeve assembly comprises a first hard sleeve, a bendable buffer sleeve fixedly connected to the bottom of the first hard sleeve, and a second hard sleeve fixedly connected to the bottom of the second hard sleeve, and a sleeve bottom plate, the top of the steering wheel support column is fixedly connected to a steering wheel body.

[0007] Preferably, the back of the first extrusion block is fixedly connected to a first connecting rod, and the end of the first connecting rod is fixedly connected to a second slider, the side of the displacement buffer block is fixedly connected to a support spring, and the end of the support spring is fixedly connected to a third slider, the back of the second extrusion block is fixedly connected to a second connecting rod, and the end of the second connecting rod is fixedly connected to a fourth slider.

[0008] Preferably, the longitudinal sections of the first extrusion block and the second extrusion block are both in the shape of right triangles, the longitudinal section of the displacement buffer block is in the shape of an isosceles triangle, and the displacement buffer block forms an elastic structure through a support spring and a third slider.

[0009] Preferably, a first slide groove is provided on the inner wall of the first hard sleeve, and the first slide groove extends to the inner walls of the bendable buffer sleeve and the second hard sleeve, and a second slide groove is provided on one side of the first hard sleeve, and the second slide groove extends to one side of the bendable buffer sleeve and the second hard sleeve.

[0010] Preferably, a third sliding block is slidably connected inside the second sliding groove, and the cross-section of the third sliding block is T-shaped.

[0011] Preferably, a third slide groove is provided on the other side of the first hard sleeve, and the third slide groove extends to the other side of the bendable buffer sleeve and the second hard sleeve, and the interior of the third slide groove is slidably connected with a second slider and a fourth slider, and the second slider and the fourth slider are both shaped like circular shafts.

[0012] Preferably, the wire diameter of the primary buffer spring is smaller than the wire diameter of the secondary buffer spring, the length of the primary buffer spring is consistent with the length of the secondary buffer spring, and the number of turns of the primary buffer spring is consistent with the number of turns of the secondary buffer spring.

[0013] Preferably, a first slider is fixedly connected to the side of the steering wheel support column, a first slider is slidably connected inside the first slide groove, the bottom of the first slider is tightly fitted with a limiting block plate, and two first sliders are symmetrically arranged about the vertical center axis of the steering wheel support column.

[0014] Preferably, the steering wheel support column forms an elastic structure through a primary buffer spring and a first extrusion block, and the bottom end of the primary buffer spring and the bottom end of the first extrusion block are fixedly connected.

[0015] Preferably, the second extrusion block forms an elastic structure with the sleeve bottom plate through a secondary buffer spring, and the bottom end of the secondary buffer spring is fixedly connected to the sleeve bottom plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: a safety protection device for a car steering wheel provided by the present invention is provided with a primary buffer spring and a secondary buffer spring as double buffer springs inside a support column, and the elastic coefficient of the upper spring is smaller and is easier to deform. When a collision occurs, it can quickly and easily absorb the impact force, and can provide primary buffering protection for the driver and reduce the impact force. The elastic coefficient of the lower spring is larger and can absorb more energy. When the collision is more intense, it can buffer and absorb the remaining force. The double springs cooperate with each other to improve the buffering protection effect.

[0017] The present invention provides a safety protection device for a car steering wheel. When the steering wheel is unevenly impacted, the steering wheel close to the driver's side can be bent and buffered under the action of a bending buffer component, so that the steering wheel can be adjusted to a direction nearly parallel to the driver's direction, increasing the force area at the driver's arm during impact, thereby reducing pressure and reducing injuries. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the cross-sectional structure of the support column part of the present invention cut along the second slide groove and the third slide groove; Figure 2 It is a schematic diagram of the cross-sectional structure of the support column part of the present invention cut along the first slide groove; Figure 3 It is a schematic diagram of the internal structure of the support column part of the present invention; Figure 4 It is a schematic diagram of the cross-sectional structure of a support column sleeve assembly according to the present invention, which is partially cut along the first slide groove; Figure 5 It is a schematic diagram of the cross-sectional structure of the support column sleeve assembly of the present invention cut along the second slide groove and the third slide groove; Figure 6 It is a schematic diagram of the overall three-dimensional structure of the present invention from the side; Figure 7It is a schematic diagram of the three-dimensional structure of the bending buffer component part of the present invention.

[0019] In the figure: 1. steering wheel support column; 2. primary buffer spring; 3. bending buffer assembly; 4. secondary buffer spring; 5. support column sleeve assembly; 6. first slider; 7. limit baffle; 8. steering wheel body; 301. first extrusion block; 302. first connecting rod; 303. second slider; 304. displacement buffer block; 305. support spring; 306. third slider; 307. second extrusion block; 308. second connecting rod; 309. fourth slider; 501. first hard sleeve; 502. bendable buffer sleeve; 503. second hard sleeve; 504. first slide groove; 505. second slide groove; 506. sleeve bottom plate; 507. third slide groove. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0022] Combination Figure 1-Figure 7 The present invention provides a safety protection device for a car steering wheel, comprising a steering wheel support column 1, a primary buffer spring 2 is fixedly connected to the bottom of the steering wheel support column 1, and a bending buffer assembly 3 is installed at the bottom of the primary buffer spring 2, the bending buffer assembly 3 comprises a first extrusion block 301, the first extrusion block 301 is fixedly connected to the bottom end of the primary buffer spring 2, and a displacement buffer block 304 is slidably connected to the bottom of the first extrusion block 301, and a second extrusion block 307 is slidably connected to the bottom of the displacement buffer block 304, and the second extrusion block 307 is slidably connected to the bottom of the displacement buffer block 304. The bottom of the extrusion block 307 is fixedly connected to a secondary buffer spring 4, the outside of the steering wheel support column 1 is slidably connected to a support column sleeve assembly 5, and the support column sleeve assembly 5 includes a first hard sleeve 501, the bottom of the first hard sleeve 501 is fixedly connected to a bendable buffer sleeve 502, and the bottom of the bendable buffer sleeve 502 is fixedly connected to a second hard sleeve 503, and the bottom of the second hard sleeve 503 is fixedly connected to a sleeve base plate 506, and the top of the steering wheel support column 1 is fixedly connected to a steering wheel body 8.

[0023] The back of the first extrusion block 301 is fixedly connected to the first connecting rod 302, and the end of the first connecting rod 302 is fixedly connected to the second slider 303, the side of the displacement buffer block 304 is fixedly connected to the support spring 305, and the end of the support spring 305 is fixedly connected to the third slider 306, the back of the second extrusion block 307 is fixedly connected to the second connecting rod 308, and the end of the second connecting rod 308 is fixedly connected to the fourth slider 309, the longitudinal sections of the first extrusion block 301 and the second extrusion block 307 are both set in the shape of a right triangle, the longitudinal section of the displacement buffer block 304 is set in the shape of an isosceles triangle, and the displacement buffer block 304 forms an elastic structure through the support spring 305 and the third slider 306.

[0024] When a collision occurs, the side of the steering wheel close to the driver's chest is closer to the driver, and is more likely to cause an impact with the driver. When an impact occurs, under the action of the support spring 305, the displacement buffer block 304 is pressed between the first extrusion block 301 and the second extrusion block 307 to support the first extrusion block 301. When an impact occurs, the side of the steering wheel close to the driver corresponds to the side with a gap between the first extrusion block 301 and the second extrusion block 307. When the steering wheel is unevenly stressed, the bottom end of the steering wheel support column 1 will squeeze The thinner side of the first extrusion block 301 can be rotated downward to squeeze the displacement buffer block 304 outward, and the displacement buffer block 304 compresses the support spring 305 on its side to perform buffering. At the same time, the outer wall of the bendable buffer sleeve 502 close to the support spring 305 is pre-arranged with a notch, and when subjected to force, it can bend along the notch, so that the inclination angle of the steering wheel can be adaptively buffered and adjusted, thereby preventing the driver's arms from being too tense, the muscles are instinctively tense, and the impact force between the driver and the steering wheel is too large to cause damage.

[0025] A first slide groove 504 is provided on the inner wall of the first hard sleeve 501, and the first slide groove 504 extends to the inner wall of the bendable buffer sleeve 502 and the second hard sleeve 503; a second slide groove 505 is provided on one side of the first hard sleeve 501, and the second slide groove 505 extends to one side of the bendable buffer sleeve 502 and the second hard sleeve 503; the interior of the second slide groove 505 is slidably connected with a third slider 306, and the cross-sectional shape of the third slider 306 is T-shaped; a third slide groove 507 is provided on the other side of the first hard sleeve 501, and the third slide groove 507 extends to the other side of the bendable buffer sleeve 502 and the second hard sleeve 503; the interior of the third slide groove 507 is slidably connected with the second slider 303 and the fourth slider 309, and the shapes of the second slider 303 and the fourth slider 309 are both circular axis-shaped.

[0026] The wire diameter of the primary buffer spring 2 is smaller than the wire diameter of the secondary buffer spring 4, and the length of the primary buffer spring 2 is consistent with the length of the secondary buffer spring 4, and the number of turns of the primary buffer spring 2 is consistent with the number of turns of the secondary buffer spring 4. The side of the steering wheel support column 1 is fixedly connected with a first slider 6, and the inside of the first slide groove 504 is slidably connected with the first slider 6. The bottom of the first slider 6 is tightly fitted with a limiting block 7, and two first sliders 6 are symmetrically arranged about the vertical center axis of the steering wheel support column 1. The steering wheel support column 1 forms an elastic structure with the first extrusion block 301 through the primary buffer spring 2, and the bottom end of the primary buffer spring 2 is fixedly connected to the bottom end of the first extrusion block 301. The second extrusion block 307 forms an elastic structure with the secondary buffer spring 4 and the sleeve bottom plate 506, and the bottom end of the secondary buffer spring 4 is fixedly connected to the sleeve bottom plate 506.

[0027] The limit baffle 7 blocks the bottom of the first sliding block 6. Under normal driving conditions, the steering wheel support column 1 will not slide freely inside the first hard sleeve 501. When a collision occurs, the limit baffle 7 will be broken by a certain impact force, and the first sliding block 6 can slide downward inside the first hard sleeve 501. At the same time, the bottom end of the steering wheel support column 1 first squeezes the primary buffer spring 2 downward. The primary buffer spring 2 shrinks under the force and can absorb and store the force at the same time, thereby achieving a buffering effect. The primary buffer spring 2 has a small elastic coefficient and is easier to be compressed. When the driver just hits the steering wheel, the primary buffer spring 2 can achieve rapid contraction and buffering, which is convenient for improving comfort and reducing the impact on personnel caused by the difficulty of compressing the spring itself. If the impact force is too large, the remaining force will be transmitted downward along the bending buffer assembly 3 to reach the position of the secondary buffer spring 4. The secondary buffer spring 4 has a large elastic coefficient and can withstand and absorb more energy, which is convenient for further buffering protection.

[0028] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety protection device for a car steering wheel, characterized in that: The invention comprises a steering wheel support column (1), wherein the bottom of the steering wheel support column (1) is fixedly connected to a primary buffer spring (2), and the bottom of the primary buffer spring (2) is provided with a bending buffer assembly (3), wherein the bending buffer assembly (3) comprises a first extrusion block (301), wherein the first extrusion block (301) is fixedly connected to the bottom end of the primary buffer spring (2), and the bottom of the first extrusion block (301) is slidably connected to a displacement buffer block (304), and the bottom of the displacement buffer block (304) is slidably connected to a second extrusion block (307), and the bottom of the second extrusion block (307) is The steering wheel support column (1) is fixedly connected to a secondary buffer spring (4); the outside of the steering wheel support column (1) is slidably connected to a support column sleeve assembly (5); the support column sleeve assembly (5) comprises a first hard sleeve (501); the bottom of the first hard sleeve (501) is fixedly connected to a bendable buffer sleeve (502); the bottom of the bendable buffer sleeve (502) is fixedly connected to a second hard sleeve (503); the bottom of the second hard sleeve (503) is fixedly connected to a sleeve bottom plate (506); and the top of the steering wheel support column (1) is fixedly connected to a steering wheel body (8).

2. The safety protection device for a vehicle steering wheel according to claim 1, characterized in that: The back of the first extrusion block (301) is fixedly connected to a first connecting rod (302), and the end of the first connecting rod (302) is fixedly connected to a second slider (303); the side of the displacement buffer block (304) is fixedly connected to a support spring (305), and the end of the support spring (305) is fixedly connected to a third slider (306); the back of the second extrusion block (307) is fixedly connected to a second connecting rod (308), and the end of the second connecting rod (308) is fixedly connected to a fourth slider (309).

3. A safety protection device for a vehicle steering wheel according to claim 2, characterized in that: The longitudinal sections of the first extrusion block (301) and the second extrusion block (307) are both in the shape of right triangles, the longitudinal section of the displacement buffer block (304) is in the shape of an isosceles triangle, and the displacement buffer block (304) forms an elastic structure through a support spring (305) and a third slider (306).

4. The safety protection device for a vehicle steering wheel according to claim 1, characterized in that: A first slide groove (504) is provided on the inner wall of the first hard sleeve (501), and the first slide groove (504) extends to the inner walls of the bendable buffer sleeve (502) and the second hard sleeve (503); a second slide groove (505) is provided on one side of the first hard sleeve (501), and the second slide groove (505) extends to one side of the bendable buffer sleeve (502) and the second hard sleeve (503).

5. The safety protection device for a vehicle steering wheel according to claim 4, characterized in that: The interior of the second sliding groove (505) is slidably connected to a third sliding block (306), and the cross-section of the third sliding block (306) is T-shaped.

6. The safety protection device for a vehicle steering wheel according to claim 1, characterized in that: A third slide groove (507) is provided on the other side of the first hard sleeve (501), and the third slide groove (507) extends to the other side of the bendable buffer sleeve (502) and the second hard sleeve (503), and a second slider (303) and a fourth slider (309) are slidably connected inside the third slide groove (507), and the second slider (303) and the fourth slider (309) are both shaped like circular shafts.

7. The safety protection device for a vehicle steering wheel according to claim 1, characterized in that: The wire diameter of the primary buffer spring (2) is smaller than the wire diameter of the secondary buffer spring (4), the length of the primary buffer spring (2) is consistent with the length of the secondary buffer spring (4), and the number of turns of the primary buffer spring (2) is consistent with the number of turns of the secondary buffer spring (4).

8. The safety protection device for a vehicle steering wheel according to claim 4, characterized in that: A first sliding block (6) is fixedly connected to the side of the steering wheel support column (1), the first sliding groove (504) is slidably connected to the inside of the first sliding block (6), the bottom of the first sliding block (6) is tightly fitted with a limit stopper (7), and two first sliding blocks (6) are symmetrically arranged about the vertical center axis of the steering wheel support column (1).

9. The safety protection device for a vehicle steering wheel according to claim 1, characterized in that: The steering wheel support column (1) forms an elastic structure through a primary buffer spring (2) and a first extrusion block (301), and the bottom end of the primary buffer spring (2) and the bottom end of the first extrusion block (301) are fixedly connected.

10. The safety protection device for a vehicle steering wheel according to claim 1, characterized in that: The second extrusion block (307) forms an elastic structure between the secondary buffer spring (4) and the sleeve bottom plate (506), and the bottom end of the secondary buffer spring (4) and the sleeve bottom plate (506) are fixedly connected.

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