Composite spring damping device

Abstract

The invention discloses a composite spring vibration reduction device, relates to the technical field of automobile suspension vibration reduction, and solves the problems that an existing air bag and spring composite vibration reduction structure is inconvenient to install and high in cost. A connecting seat; the air bag is limited and fixed between the two limiting structures, the air bag is internally provided with an air chamber, the top of the air chamber is provided with an air inlet stud, the air inlet stud is connected with the upper mounting seat, and the air inlet stud is provided with an air inlet hole communicated with the air chamber; a base; and a spring. When the base is impacted, impact force can be transmitted to the spiral spring, the spiral spring transmits the impact force to the air bag through the connecting seat, the impact force is weakened by the air bag and then transmitted to a vehicle body through the upper mounting seat, the impact force borne by a spiral spring body can be relatively reduced, the service life of the spiral spring is prolonged, the air bag and the spring are combined together, and the service life of the spiral spring is prolonged. The rigidity of the whole suspension device can be reduced, and better comfort is provided.

Description

Technical Field

[0001] The invention relates to the technical field of automobile suspension vibration reduction, in particular to a composite spring vibration reduction device. Background Art

[0002] As a universal vibration reduction element, coil springs are widely used in engineering machinery, automobiles, equipment, etc. As an important vibration reduction actuator, the performance of coil springs directly determines the comfort level of the vehicle. As for the coil spring itself, its stiffness is relatively large, the vehicle comfort level is relatively low, the impact kinetic energy of the road is completely consumed, and the fatigue life is relatively low, so coil springs are widely used in low-end models.

[0003] In high-end models, air suspension is the mainstream design and air springs are widely used. The air springs have relatively low stiffness and better ride comfort, but the overall cost of air suspension is relatively high and is not suitable for use in low-end models.

[0004] The prior art mostly adopts a composite air spring structure with a publication number of CN111765195A, where the spring is directly installed on the inner side of the airbag and connected to the piston to form a composite structure; or a composite compression spring with a publication number of CN209180288U, where multiple airbags are compositely stacked together and the spring is installed on the inner side of the airbag. The above-mentioned springs and airbags are inconvenient to install. The spring built into the inner side of the airbag will occupy a large space inside the airbag, which requires the volume of the airbag to be large enough, which will increase the cost of the vibration reduction device and is not suitable for low-end models. Summary of the invention

[0005] The purpose of the present invention is to solve the above problems and to design a composite spring damping device to solve the problems of inconvenient installation and high cost of the existing air bag and spring composite damping structure.

[0006] The technical solution of the present invention to achieve the above-mentioned purpose is a composite spring vibration reduction device, comprising: An upper mounting seat, wherein a bottom surface of the upper mounting seat has a limiting structure; A connecting seat, wherein the upper surface of the connecting seat has a limiting structure, and the bottom surface of the connecting seat has a positioning structure; An airbag, wherein the airbag is fixed between the two limiting structures, the airbag has an air chamber, the top of the air chamber is provided with an air intake stud, the air intake stud is connected to the upper mounting seat, and the air intake stud has an air intake hole connected to the air chamber; A base, wherein the upper surface of the base has a positioning structure; A spring, wherein the upper and lower ends of the spring are respectively interlaced and connected with the two positioning structures.

[0007] Furthermore, a mounting hole is provided in the middle of the upper mounting seat, and the air intake stud passes through the mounting hole and is fixed to the upper mounting seat by a nut.

[0008] Furthermore, the air intake stud is vulcanizedly connected to the airbag.

[0009] Furthermore, the upper mounting seat is provided with a plurality of connecting studs for connecting with the automobile.

[0010] Furthermore, an upper constraint skirt in the shape of an annular shape is welded to the bottom surface of the upper mounting seat, and the upper constraint skirt extends downward and expands outward during the extension process, and the upper constraint skirt cooperates with the upper mounting seat to form a limited position cavity in the middle, and an annular lower constraint skirt is welded to the upper surface of the connecting seat, and the lower constraint skirt extends upward and expands outward during the extension process, and the lower constraint skirt cooperates with the connecting seat to form a limited position cavity in the middle, and the upper and lower ends of the airbag are respectively located in the two limited position cavities.

[0011] Furthermore, the lower side of the upper restraining skirt is bent horizontally outward to form a first guide portion, and the upper side of the lower restraining skirt is bent horizontally outward to form a second guide portion.

[0012] Furthermore, the bending parts of the first guide portion and the second guide portion are provided with rounded corners.

[0013] Furthermore, a first positioning member is disposed on the bottom surface of the connecting seat, a second positioning member is disposed on the upper surface of the base, and upper and lower ends of the spring are respectively plugged into the first positioning member and the second positioning member.

[0014] Furthermore, the outer peripheral surfaces of the first positioning member and the second positioning member are conical surfaces.

[0015] Furthermore, the diameters of the first positioning member and the second positioning member are matched with the inner diameter of the spring.

[0016] Compared with the prior art, the beneficial effects are: The vibration reduction device of the present invention removes the piston of the traditional air spring, and combines the airbag and the spring together, so that the structure becomes simpler and the cost is further reduced. The upper and lower ends of the airbag are fixed between the upper mounting seat and the connecting seat by a limiting structure, and the spring is located between the connecting seat and the base. The upper and lower ends of the spring are positioned by a positioning structure to ensure that the center of the spring coincides with the center of the airbag, so that the direction of the axial force on the two is consistent. By combining the airbag and the spring together, firstly, the stiffness of the entire suspension device can be reduced to provide better comfort. Secondly, the overall stiffness of the vibration reduction device can be adjusted by adjusting the structure and air pressure of the airbag to achieve a certain degree of air suspension effect. Thirdly, the installation height is adjustable to reduce the difficulty of installing the coil spring. Fourthly, the compression of the airbag can reduce the impact force on the coil spring and increase the service life of the coil spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the shaft side structure of the composite spring vibration reduction device of the present invention; Figure 2 yes Figure 1 A structural diagram from another perspective; Figure 3 It is a schematic cross-sectional view of the composite spring vibration reduction device of the present invention; Figure 4 It is a schematic cross-sectional view of the composite spring vibration reduction device of the present invention when the airbag is removed.

[0018] In the figure, 1, upper mounting seat; 11, upper restraining skirt; 111, first guide part; 2, airbag; 21, air chamber; 3, connecting seat; 31, lower restraining skirt; 311, second guide part; 32, first positioning member; 4, spring; 5, base; 51, second positioning member; 6, air intake stud; 601, air intake hole; 7, nut; 8, connecting stud; 101, groove; 102, limiting cavity; 501, cone surface. DETAILED DESCRIPTION

[0019] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0020] like Figure 1-Figure 3As shown, a preferred embodiment of the present invention provides a composite spring vibration reduction device, which includes an upper mounting seat 1, an airbag 2, a connecting seat 3, a spring 4, a base 5 and other components from top to bottom, wherein the bottom surface of the upper mounting seat 1 and the upper surface of the connecting seat 3 are both welded with a restraining skirt, namely an upper restraining skirt 11 and a lower restraining skirt 31. The airbag 2 is located between the upper restraining skirt 11 and the lower restraining skirt 31, and the spring 4 is located between the connecting seat 3 and the base 5.

[0021] The airbag 2 and the spring 4 together form a composite vibration reduction structure, which can effectively reduce the stiffness of the suspension, distribute the impact force of the road surface to the airbag 2, reduce the impact of the road surface on the coil spring, increase the life of the coil spring, and improve the comfort of vehicles using coil spring suspension.

[0022] like Figure 2-Figure 4 As shown, the upper constraint skirt 11 is annular and extends obliquely downward. It gradually expands outward during the downward extension process. The lower end of the upper constraint skirt 11 is bent outward along the horizontal direction to form a first guide portion 111. The structure of the lower constraint skirt 31 is consistent with that of the upper constraint skirt 11. The lower constraint skirt 31 extends obliquely upward. It gradually expands outward during the upward extension process. The upper end of the lower constraint skirt 31 is bent outward along the horizontal direction to form a second guide portion 311. The first guide portion 111 and the second guide portion 311 are parallel. A limited position cavity 102 is formed between the upper constraint skirt 11 and the upper mounting seat 1. Similarly, a limited position cavity 102 is also formed between the lower constraint skirt 31 and the connecting seat 3. The upper and lower ends of the airbag 2 are respectively located in the two limited positions 102. The two limited positions 102 can constrain and position the airbag 2.

[0023] The airbag 2 is a hollow structure with an air chamber 21 in the middle, and there is gas at a certain pressure in the air chamber 21. When the airbag 2 is compressed, the gas in the air chamber 21 cannot be discharged, and the upper and lower ends of the airbag 2 are limited by the upper and lower restraint skirts 11 and 31 at the same time. The upper and lower ends of the airbag 2 will be close to the upper and lower restraint skirts 11 and 31, and the middle of the airbag 2 will expand outward, and the middle part of the airbag 2 will expand outward along the gap between the first guide part 111 and the second guide part 311. The first guide part 111 and the second guide part 311 will guide the expansion of the airbag 2. When the airbag 2 is expanded, the first guide part 111 and the second guide part 311 are in surface-to-surface contact, and the force is more uniform, and the airbag 2 will not be crushed.

[0024] In order to prevent the airbag 2 from being cut, the bending parts between the first guide part 111 and the upper restraining skirt 11 and the bending parts between the second guide part 311 and the lower restraining skirt 31 are rounded to make them smooth, so that the middle part of the airbag 2 will not be cut when it touches the rounded parts during the outward expansion process.

[0025] If the first guide portion 111 and the second guide portion 311 are not provided, when the middle portion of the airbag 2 expands outward, the lower edge of the upper restraint skirt 11 and the upper edge of the lower restraint skirt 31 will exert linear compression on the airbag 2, which may easily rupture the airbag 2.

[0026] In this embodiment, the upper restraining skirt 11 and the lower restraining skirt 31 together form a limiting structure, which can position the airbag 2 and ensure that the center of the airbag 2 always coincides with the central axis between the upper mounting seat 1 and the connecting seat 3.

[0027] like Figure 3 As shown, an air intake stud 6 is installed on the top of the airbag 2, and the lower end of the air intake stud 6 extends into the air chamber 21 and is vulcanized and bonded to the top wall of the air chamber 21 through a vulcanization process. The air intake stud 6 has an air intake hole 601 that passes through from top to bottom, and the air intake hole 601 is connected to the air chamber 21 in the airbag 2. The end of the air intake stud 6 exposed outside the airbag 2 is connected to the air source, and air is inflated into the airbag 2 through the air intake hole 601 to keep a certain pressure in the air chamber 21.

[0028] The upper mounting seat 1 has a mounting hole in the middle, through which the air intake stud 6 passes, and the outer side of the air intake stud 6 has an external thread for connecting with a nut 7. The nut 7 cooperates with the air intake stud 6 to lock the airbag 2 on the upper mounting seat 1. A plurality of connecting studs 8 are also installed on the upper mounting seat 1, and the connecting studs 8 can be connected to the vehicle body.

[0029] refer to Figure 3 In this embodiment, the spring 4 is a coil spring, which is located between the connecting seat 3 and the base 5. A first positioning member 32 is formed on the bottom surface of the connecting seat 3, and a second positioning member 51 is formed on the upper surface of the base 5. The first positioning member 32 and the second positioning member 51 have the same structure, and respectively position the upper and lower ends of the coil spring.

[0030] The shapes of the first positioning member 32 and the second positioning member 51 are similar to a truncated cone, so the outer peripheral surfaces of the first positioning member 32 and the second positioning member 51 are conical surfaces 501. The upper and lower ends of the coil spring are respectively plugged with the first positioning member 32 and the second positioning member 51, and the first positioning member 32 and the second positioning member 51 can position the coil spring.

[0031] In other technical solutions, the shapes of the first positioning member 32 and the second positioning member 51 can also be designed to be cylindrical, but the diameters of the first positioning member 32 and the second positioning member 51 must be consistent with the inner diameter of the coil spring, so that the coil spring can be positioned and guided to prevent the coil spring from shaking.

[0032] In this embodiment, the conical surface 501 on the outer side of the first positioning member 32 and the second positioning member 51 can meet the positioning requirements of springs 4 of different diameters, and at the same time can align the spring 4 so that the center of the spring 4 coincides with the center of the airbag 2, so that the axial force exerted on the spring 4 and the axial force exerted on the airbag 2 are in the same direction.

[0033] A groove 101 is provided between the first positioning member 32 and the second positioning member 51 , so as to reduce the material consumption and lower the cost.

[0034] When working, a certain pressure of gas is filled into the airbag 2 through the air inlet 601. When the vehicle is running, the base 5 is impacted by the road surface along with the wheel, and the impact force is transmitted to the coil spring, and the coil spring transmits the impact force to the airbag 2 through the connecting seat 3, and the impact force is weakened by the airbag 2 and then transmitted to the vehicle body through the upper mounting seat 1.

[0035] When the entire device is subjected to impact force, the airbag 2 is first in a compressed state to weaken the impact force to a certain extent. The compression of the coil spring is accompanied by the compression of the airbag 2, and the overall upward movement is compressed, and the impact force on the coil spring body is relatively reduced.

[0036] The filling pressure in the airbag 2 is different, the stiffness of the entire suspension is different, and the height of the vehicle body is also different. This also achieves the effect of adjusting the stiffness of the suspension and the height of the vehicle body to adapt to different working conditions.

[0037] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. A composite spring damping device, characterized in that: include: An upper mounting seat (1), wherein the bottom surface of the upper mounting seat (1) has a limiting structure; A connecting seat (3), wherein the upper surface of the connecting seat (3) has a limiting structure, and the bottom surface of the connecting seat (3) has a positioning structure; An airbag (2), the airbag (2) being fixed between the two limiting structures, the airbag (2) having an air chamber (21) therein, an air intake stud (6) being arranged at the top of the air chamber (21), the air intake stud (6) being connected to the upper mounting seat (1), and the air intake stud (6) having an air intake hole (601) communicating with the air chamber (21); A base (5), wherein the upper surface of the base (5) has a positioning structure; A spring (4), wherein the upper and lower ends of the spring (4) are respectively interlaced and connected with the two positioning structures.

2. The composite spring damping device according to claim 1, characterized in that: The upper mounting seat (1) has a mounting hole in the middle thereof, and the air intake stud (6) passes through the mounting hole and is fixed to the upper mounting seat (1) via a nut (7).

3. The composite spring damping device according to claim 2, characterized in that: The air intake stud (6) is vulcanized and connected to the air bag (2).

4. The composite spring damping device according to claim 1, characterized in that: The upper mounting seat (1) is provided with a plurality of connecting studs (8) for connecting to a vehicle.

5. The composite spring damping device according to claim 1, characterized in that: An annular upper constraint skirt (11) is welded to the bottom surface of the upper mounting seat (1), the upper constraint skirt (11) extends downward and expands outward during the extension process, the upper constraint skirt (11) cooperates with the upper mounting seat (1) and forms a limited position cavity (102) in the middle, and an annular lower constraint skirt (31) is welded to the upper surface of the connecting seat (3), the lower constraint skirt (31) extends upward and expands outward during the extension process, the lower constraint skirt (31) cooperates with the connecting seat (3) and forms a limited position cavity (102) in the middle, and the upper and lower ends of the airbag (2) are respectively located in the two limited position cavities (102).

6. The composite spring damping device according to claim 5, characterized in that: The lower side of the upper restraining skirt (11) is bent horizontally outward to form a first guide portion (111), and the upper side of the lower restraining skirt (31) is bent horizontally outward to form a second guide portion (311).

7. The composite spring damping device according to claim 6, characterized in that: The bending parts of the first guide portion (111) and the second guide portion (311) are provided with rounded corners.

8. The composite spring damping device according to claim 1, characterized in that: The bottom surface of the connecting seat (3) is provided with a first positioning member (32), the upper surface of the base (5) is provided with a second positioning member (51), and the upper and lower ends of the spring (4) are respectively plugged into the first positioning member (32) and the second positioning member (51).

9. The composite spring damping device according to claim 8, characterized in that: The outer peripheral surfaces of the first positioning member (32) and the second positioning member (51) are conical surfaces (501).

10. The composite spring damping device according to claim 8, characterized in that: The diameters of the first positioning member (32) and the second positioning member (51) are adapted to the inner diameter of the spring (4).

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