CN108953459A - A kind of double restricted type novel suspending bracket air springs - Google Patents

Abstract

The invention belongs to the technical field of air springs, especially a double-constraint type novel suspension air spring, which includes a piston, a gourd-shaped rubber air bag is placed above the piston, and an air bag protective cover is buckled on the outer wall of the rubber air bag. The outer wall of the rubber airbag is provided with a restraint assembly; the restraint assembly includes a lower restraint ring, an upper restraint ring and an airbag protective cover, the lower restraint ring is placed at the contact part of the rubber airbag and the airbag protective cover, and the upper restraint ring is integrally formed On the outer wall of the rubber airbag. The novel suspension air spring of the invention has excellent dust-proof and sand-stone-proof capabilities, and improves the safety of the vehicle. The above constraint ring is the boundary, and the upper and lower two-section cord crossing angle design is adopted; after the rubber airbag is constrained by the upper constraint ring and protected by the airbag protective cover, it will not cause interference friction with the surrounding components, so that the internal structure of the airbag will not occur due to fatigue expansion. Changes to ensure the stability of the mechanical properties of the air spring and improve the fatigue life of the air spring.

Description

A new dual-constraint type suspension air spring

technical field

The invention belongs to the technical field of air springs, and in particular relates to a double-constrained novel suspension air spring.

Background technique

Air spring is an ideal elastic element with ideal nonlinear mechanical properties. It is widely used in many fields such as commercial vehicle cab, train secondary suspension, vehicle suspension, and equipment shock absorption. The superior mechanical properties of the air spring can provide a good ride comfort for the vehicle.

However, in the prior art, the rubber airbag in the suspension air spring structure has no outer restraint ring and no airbag protective cover. When the rubber airbag is compressed or stretched, the outer diameter of the rubber airbag changes greatly. Especially in the case of heavy vibration and shock and after repeated fatigue of the rubber airbag, the enlarged outer diameter of the rubber airbag will easily cause interference friction between the surface of the airbag and surrounding components, resulting in premature damage; the enlarged outer diameter will also make the inner curtain of the airbag Changes in the crossing angle of the lines, etc., lead to changes in mechanical properties and reduce the fatigue life of the air spring.

In the prior art, the suspension air spring rubber airbag and the curved parts of the piston are exposed to the external environment, and the external sand and gravel splash on the rubber airbag or piston, which easily leads to premature damage of the rubber airbag.

Therefore, in order to improve the traditional suspension air spring rubber airbag fatigue expansion interference, affected by the external environment and other problems, it is particularly urgent to study a new type of suspension air spring that prevents rubber airbag fatigue expansion, high fatigue life, and high safety.

Contents of the invention

In order to solve the problems raised in the above-mentioned background technology. The invention provides a double-constraint type novel suspension air spring, which has the characteristics of preventing fatigue expansion interference of the air spring, avoiding the influence of external environment, and improving the service life and safety of the air spring.

In order to achieve the above object, the present invention provides the following technical solutions: a new dual-constraint type suspension air spring, including a piston, a rubber air bag is placed above the piston, and the contact area between the rubber air bag and the piston is outside the top of the piston. A second pressure ring is placed at the edge, the outer wall of the rubber airbag is buckled with an airbag protective cover, and the outer wall of the rubber airbag is provided with a restraint assembly;

The restraint assembly includes a lower restraint ring, an upper restraint ring and an airbag protective cover, the lower restraint ring is placed at the contact position between the rubber airbag and the airbag protective cover, and serves as a support ring for the airbag protective cover, and the upper restraint ring is integrally formed On the outer wall of the rubber airbag, the top of the rubber airbag is provided with an upper iron piece, the outer side of the upper iron piece is provided with a first pressure ring, and a rubber gasket is placed on the top of the upper iron piece, and the upper iron piece There is an air intake nozzle on the side.

In order to facilitate the disconnection and connection of the connecting air pipe, as a preferred technical solution of a double-constraint type new suspension air spring of the present invention, the air inlet nozzle is installed sideways in the upper iron part, and the air inlet nozzle and the upper iron part Threaded connection is adopted, and the connecting air pipe in the air inlet nozzle is a quick-plug connection.

In order to improve the airtightness of the equipment structure, as a preferred technical solution of a double-constraint type new suspension air spring of the present invention, the outer wall of the upper iron part is uniformly provided with anti-skid grooves, and the outer wall of the upper iron part is integrally formed with a mounting seat , The outer dust cover is fixed on the mounting base.

In order to avoid environmental interference such as external sand and stones during the stretching process of the spring, and to avoid premature damage to the spring, as a preferred technical solution of a double-constraint type new suspension air spring of the present invention, the upper end of the outer dust cover is connected to the middle part of the upper iron piece , the lower end is connected with the bottom of the piston to form a fully enclosed protective structure.

In order to improve the structural strength, anti-aging ability and constrained expansion diameter of the equipment, as a preferred technical solution of a double-constrained new type suspension air spring of the present invention, the rubber airbag is composed of neoprene, cord fabric, upper constraining ring, lower Constrained ring vulcanization.

In order to avoid the fatigue expansion interference of the air spring, increase the fatigue life of the air spring, and keep the mechanical performance of the air spring stable, as a preferred technical solution of the double-constraint type new suspension air spring of the present invention, the two confinement rings are both external, and the upper The confinement ring is used to limit the expansion outer diameter of the upper airbag; the lower confinement ring is used as the support ring of the airbag protective cover, and together with the airbag protective cover, restricts the expansion outer diameter of the lower airbag.

In order to achieve better mechanical properties and avoid interference, as a preferred technical solution of a double-constrained new suspension air spring of the present invention, the crossing angle of the airbag cords above the upper restraint ring is different from the crossing angle of the cords below the upper restraint ring ; That is, the same rubber airbag is bounded by the upper restraint ring, and the design adopts two different crossing angles of the cords; keep an appropriate distance between the two restraint rings.

In order to constrain the expansion diameter of the airbag, protect the airbag between the two restraint rings and the airbag at the lower end of the airbag protective cover, and compensate for the phenomenon that the diameter of the airbag at the lower end of the piston is too large during the compression process of the airbag, as a double-constrained new suspension of the present invention The preferred technical solution of the air spring, the airbag protective cover is buckled on the lower restraining ring, the upper and lower ends of the airbag protective cover are designed with flanging, and the diameter of the airbag protective cover gradually increases from the middle to the lower end.

In order to realize the different requirements of the vehicle suspension on the stiffness of the air spring at different working heights, and further improve the comfort and air tightness of the air spring, as a preferred technical solution of a double-constraint type new suspension air spring of the present invention, the The surface shape of the piston transitions from a conical shape to a cylindrical shape, the piston is a hollow structure inside, and the upper end of the piston is uniformly provided with anti-slip grooves.

In order to increase the service life of the equipment and reduce noise, as a preferred technical solution of a double-constraint type new suspension air spring of the present invention, the rubber liner is a vulcanized EPDM rubber part.

Compared with prior art, the beneficial effect of the present invention is:

(1) The novel suspension air spring of the present invention is bounded by the upper restraint ring, and adopts a two-stage cord crossing angle design; the rubber airbag is constrained by the upper restraint ring and protected by the airbag protective cover, and the expansion outer diameter is stable, protecting the rubber The airbag will not interfere with the surrounding components, so that the internal structure of the rubber airbag will not change due to the fatigue and expansion of the airbag, so that the mechanical properties of the air spring are stable, which is conducive to improving the fatigue life and safety of the air spring and reducing maintenance and use costs.

(2) The crimping process of the airbag protective cover and the lower restraining ring is simple and mature, and the production efficiency is high; the upper and lower flanging design of the airbag protective cover effectively protects the airbag body during the inflation movement; the gourd-shaped design of the double restraint ring ensures the stable outer diameter of the airbag inflation , good mechanical properties, and can provide more ideal nonlinear mechanical properties.

(3) The fully sealed protective structure of the dust cover makes it have excellent dustproof, splashproof, and corrosion-resistant capabilities, which can effectively protect the rubber airbag and improve the safety of the vehicle. At the same time, the air spring has small mass, large bearing capacity, excellent nonlinear mechanical properties, and superior ride comfort.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of rubber air bag among the present invention;

Fig. 3 is the piston structure schematic diagram among the present invention;

Fig. 4 is a schematic structural view of the airbag protective cover in the present invention;

Fig. 5 is the structural representation of outer dust cover among the present invention;

In the figure: 1. Rubber gasket; 2. Air intake nozzle; 3. Upper iron piece; 4. First pressure ring; 5. Upper restraint ring; 6. Outer dust cover; 7. Rubber airbag; 8. Lower restraint Ring; 9, the second pressure ring; 10, the airbag protective cover; 11, the piston.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example

Please refer to Fig. 1-5, the present invention provides the following technical scheme: a kind of dual restraint type novel suspension air spring, comprises piston 11, and rubber air bag 7 is placed on the top of piston 11, and the contact area of rubber air bag 7 and piston 11 is in piston The outer edge of the top of 11 is placed with a second pressure ring 9, the outer wall of the rubber airbag 7 is buckled with an airbag protective cover 10, and the outer wall of the rubber airbag 7 is provided with a restraint assembly; the restraint assembly includes a lower restraint ring 8, an upper restraint ring 5 and an airbag The protective cover 10, the lower restraint ring 8 is placed on the contact part between the rubber airbag 7 and the airbag protective cover 10, the upper restraint ring 5 is integrally formed on the outer wall of the rubber airbag 7, and the upper iron part 3 is arranged on the top of the rubber airbag 7, and the upper iron part The outside of 3 is provided with a first pressure ring 4, the top of the upper iron part 3 is placed with a rubber gasket 1, and the side of the upper iron part 3 is provided with an air inlet nozzle 2. In this embodiment, the airbag protective cover 10 can give the rubber airbag 7 has a certain protective effect to prevent the rubber airbag 7 from being damaged due to external force and fatigue expansion interference. The appearance structure of the rubber airbag 7 in this embodiment is a gourd-shaped structure.

Specifically, the air inlet nozzle 2 is installed sideways in the upper iron part 3, and the air inlet nozzle 2 and the upper iron part 3 are connected by threads, and the connecting air pipe in the air inlet nozzle 2 is a quick-plug connection. The plug-in connection can make it easy for maintenance personnel to replace the connected air pipe, and improve the work efficiency of the staff.

Specifically, the outer wall of the upper iron part 3 is evenly provided with anti-skid grooves, and the outer wall of the upper iron part 3 is integrally formed with a mounting seat, and an outer dust cover 6 is fixed on the mounting seat. In this embodiment, the outer dust cover 6 can prevent dust , Sand and gravel enter the interior of the equipment.

Specifically, the upper end of the outer dust cover 6 is connected to the upper iron piece 3, and the lower end is connected to the piston 11 to form a fully enclosed protective structure. In this embodiment, the upper and lower ends of the outer dust cover 6 are corrugated, and there is no wave in the middle. The corrugated structure makes the outer dust cover 6 have a certain elastic space, which is convenient for the expansion and contraction of the equipment.

Specifically, the rubber airbag 7 is vulcanized by neoprene, cord fabric, an upper restraint ring 5, and a lower restraint ring 8, both of which are external, and the upper restraint ring 5 is used to limit the expansion outer diameter of the upper airbag; The lower restraint ring 8 is used as the support ring of the airbag protective cover 10, together with the airbag protective cover 10, the expansion outer diameter of the lower end airbag is limited. In this embodiment, the two restraint rings prevent the rubber airbag 7 from expanding too much and being damaged, so as to improve the use of the rubber airbag 7 Life, keep the mechanical performance of the air spring stable.

Specifically, the intersecting angle of the airbag cords above the upper confinement ring 5 is different from the intersecting angle of the cords below the upper confinement ring 5; that is, the same rubber airbag 7 is bounded by the upper confinement ring 5, and two different cord intersecting angles are adopted in the design, Maintaining an appropriate distance between the two confinement rings can effectively avoid contact between the airbag protective cover 10 and the upper confinement ring 5 , improving the stability of the device structure.

Specifically, the airbag protective cover 10 is crimped on the lower restraint ring 8, the upper and lower ends of the airbag protective cover 10 are designed with flanging, and the diameter of the airbag protective cover 10 gradually becomes larger from the middle to the lower end. In this embodiment, the piston The surface shape of 11 transitions from a conical shape to a cylindrical shape. The piston 11 has an internal hollow structure, and the upper end of the piston 11 is evenly provided with an anti-skid groove. Equipment ride comfort.

Specifically, the rubber liner is a vulcanized EPDM rubber part. In this embodiment, the EPDM rubber has a special structure due to its internal diene, so that its chemical properties have anti-oxidation, corrosion resistance, and long service life. Long.

The working principle and application process of the present invention: during the use of the present invention, the rubber gasket 1 is installed on the top of the upper iron part 3, and the air intake nozzle 2 is connected to the air intake hole on the side of the upper iron part 3 through threads. Stretch the other end of the rubber airbag 7 with a nylon rod, place it on the position of the lower restraining ring 8 of the rubber airbag 7 with special tooling and perform positioning support, the airbag protective cover 10 and the lower restraining ring 8 of the rubber airbag 7 are connected by crimping, and the crimping is completed Then take out the special tooling. The upper iron part 3, the first pressure ring 4 and the rubber air bag 7 are sealed by pressing. The rubber air bag 7, the piston 11 and the second pressure ring 9 are buckled and sealed. The upper end of the outer dust cover 6 is connected with the upper iron piece 3, the lower end is connected with the piston 11, and the upper and lower ends are connected with clamps to form a fully enclosed protective structure.

During operation, the air can be air-intaked and exhausted inside the rubber airbag 7 through the air inlet nozzle 2. The upper end of the rubber airbag 7 passes through the anti-slip groove of the upper iron part 3 and is buckled and fastened by the first pressure ring 4. The lower end of the rubber airbag 7 passes through the piston. 11 The anti-skid groove is buckled and fastened by the second pressure ring 9 to ensure the airtightness inside the product.

After inflation, the expanded outer diameter of the rubber airbag 7 is constrained by the upper restraint ring 5 and the airbag protective cover 10 in the rubber airbag 7. When the air spring is stretched or compressed, the upper restraint ring 5 and the airbag protective cover 10 keep the rubber airbag 7 The outer diameter of the expansion remains unchanged, so that the rubber airbag 7 will not interfere with the surrounding components, and the internal structure of the rubber airbag 7 will not change due to the fatigue expansion of the airbag, ensuring stable mechanical properties of the air spring and improving the fatigue life of the air spring and safety, and reduce maintenance and use costs.

The upper end of the outer dust cover 6 is connected with the upper iron piece 3, and the lower end is connected with the piston 11 to form a fully enclosed protective structure. The fully sealed protective structure makes it have excellent dustproof, splashproof, and corrosion-resistant capabilities, which can effectively protect the rubber airbag 7 and improve the safety of the vehicle.

The piston 11 adopts high-strength nylon injection molding and internal hollow design, which reduces the weight of the air spring, improves the lightweight level and increases the working volume, reduces the unsprung mass, and improves the ride comfort of the vehicle.

In describing the present invention, it should be understood that the terms "upper", "lower", "left", "right", "one end", "middle", "circumference", "top", "bottom", The orientation or positional relationship indicated by "left end", "right end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have Certain orientations, constructed and operative in certain orientations, therefore are not to be construed as limitations on the invention.

In addition, the terms "first" and "another" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" and "several" mean at least two, such as two, three, etc., unless otherwise specifically defined.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of this specification, a description referring to the terms "one embodiment", "an example" and the like means that a specific feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. example. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. within range.

Claims (10)

1. a kind of double restricted type novel suspending bracket air springs, it is characterised in that: air spring includes:

Piston, is placed with rubber pneumatic bag above the piston, and the contact area of the rubber pneumatic bag and piston is on the top of piston It is placed with the second pressure ring at the outer rim of end, the outer wall of the rubber pneumatic bag has withheld air bag protective cover；

Restraint assembly, the restraint assembly include lower confinement ring, upper confinement ring and air bag protective cover, and the lower confinement ring is placed In the contact site of rubber pneumatic bag and air bag protective cover, as the support ring of air bag protective cover, the upper confinement ring is integrally formed In the outer wall of rubber pneumatic bag, the top of the rubber pneumatic bag is equipped with upper iron piece, and the outside of the upper iron piece lower end is equipped with the first pressure Ring is set as outer dust guard holder at maximum gauge in the middle part of the upper iron piece, and the top of the upper iron piece is placed with rubber packing, institute The side for stating upper iron piece is equipped with suction nozzle.

It is connect in the middle part of outer dust cover, the outer dust cover upper end and upper iron piece, lower end is connect with piston base, is formed totally-enclosed anti- Protection structure.

2. a kind of double restricted type novel suspending bracket air springs according to claim 1, it is characterised in that: the suction nozzle side It sets and is installed in upper iron piece, and suction nozzle is used with upper iron piece and is threadedly coupled, the connection tracheae in suction nozzle is push-in connection.

3. a kind of double restricted type novel suspending bracket air springs according to claim 1, it is characterised in that: under the upper iron piece End outer wall is uniformly provided with non-slip groove, and the middle part outer wall of the upper iron piece is fixed with outer integrally formed with mounting base in mounting base Dust cover.

4. a kind of double restricted type novel suspending bracket air springs according to claim 1, it is characterised in that: outer dust cover upper end It is connect with upper iron piece middle part, lower end is connect with piston base, forms totally-enclosed safeguard structure.

5. a kind of double restricted type novel suspending bracket air springs according to claim 1, it is characterised in that: the rubber pneumatic bag Integral structure is sulfided by neoprene, cord fabric and upper confinement ring, lower confinement ring, rubber pneumatic bag is Pear-Shaped structure.

6. a kind of double restricted type novel suspending bracket air springs according to claim 5, it is characterised in that: two confinement rings are equal For external, support ring of the lower confinement ring as air bag protective cover.

7. a kind of double restricted type novel suspending bracket air springs according to claim 1, it is characterised in that: above upper confinement ring The air bag cord fabric thread angle of the crossing it is different from the cord fabric thread angle of the crossing below upper confinement ring；I.e. same rubber pneumatic bag constraints above ring is Boundary, design use two different cord fabric thread angles of the crossing, keep spacing appropriate between two confinement rings.

8. a kind of double restricted type novel suspending bracket air springs according to claim 1, it is characterised in that: the air bag protection Cover is withheld in lower confinement ring, and air bag protective cover upper/lower terminal is flanging design, and air bag protective cover diameter is from centre to lower end Gradually transition becomes larger.

9. a kind of double restricted type novel suspending bracket air springs according to claim 1, it is characterised in that: the piston face Shape is transitioned into cylindric by coniform, and piston is hollow structure inside, and piston upper end is uniformly provided with non-slip groove, piston base Outer dust guard holder is set as at maximum gauge.

10. a kind of double restricted type novel suspending bracket air springs according to claim 1, it is characterised in that: the rubber lining Pad is vulcanization ethylene propylene diene rubber part.