WO2019137068A1

WO2019137068A1 - Flocked spring

Info

Publication number: WO2019137068A1
Application number: PCT/CN2018/112540
Authority: WO
Inventors: 葛敬东; 唐朋万; 唐书豪; 赵春啸
Original assignee: 太仓卡兰平汽车零部件有限公司
Priority date: 2018-01-12
Filing date: 2018-10-30
Publication date: 2019-07-18
Also published as: JP2021511209A; JP2023036951A; JP2021510359A; JP7208255B2; JP2021510358A; WO2019137070A1; JP7452781B2; JP7287980B2; WO2019137069A1; JP2023123428A

Abstract

A flocked spring, comprising a spring body (1), an anti-rust coating, and a flocked coating (2) on the outer surface of the spring. The anti-rust coating is provided on the surface of the spring body, and the flocked coating (2) on the outer surface of the spring is provided on an outer layer of the anti-rust coating. The outer surface of the spring is flocked and the side surface is avoided from flocking, so that the longitudinal solid height of the spring is reduced, an electric tailgate system with a small space can also use the flocked spring, and the problem of noise is solved. A circular steel wire is replaced with an oval or goose-egg-shaped steel wire (3), so that the longitudinal solid height of the spring is reduced. An electrophoretic coating (4) is replaced with a zinc aluminum micro-sheet coating (7), so that the anti-rust capability is improved, and environmental pollution is reduced.

Description

a cashmere spring

技术领域Technical field

The present invention relates to the field of spring fittings for electric tailgate systems, and more particularly to a tufting spring.

背景技术Background technique

With the improvement of people's quality of life, people are increasingly pursuing a quiet and comfortable environment. The application of traditional springs in the electric tailgate system produces high-decibel noise, so the surface of the spring body is flocked on the market to solve the effect of reducing friction and reducing noise.

At present, the flocking springs applied to the electric tailgate are completed by spraying glue and electrostatic flocking. After the completion, the inner and outer sides of the spring are flocked, because the fluff implanted inside the spring body can not not reduce the friction. The function also increases the inner and outer diameter of the spring. For many tailgate systems with relatively narrow design space, the increase of the inner and outer diameter of the spring makes the design and assembly of the spring difficult.

At present, flocking springs applied to electric tailgates are made of circular section steel wires, but customers want the springs to have as little space as possible to create a lighter weight electric tailgate strut system. For tailgate systems with a relatively small longitudinal space, conventional round-section steel wires are used, and many models of tailgate systems cannot use flocking springs to eliminate noise.

At present, the flocking springs applied to the electric tailgate are flocked on the surface of the rust-proof coating on the bottom surface, but the wastewater generated by the electrophoretic paint brings environmental problems, and the electrophoretic coating is a closed coating. Once scratched by the outside world, it will quickly rust and gradually spread.

发明内容Summary of the invention

In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is to overcome the prior art flocking and increase the inner and outer diameters of the spring at the same time. For many tailgate systems with relatively narrow design space, the increase of the inner and outer diameters of the spring allows the spring The design and assembly of difficult problems, as well as overcoming the waste water generated by electrophoretic paint will bring environmental problems, and the electrophoretic coating is a closed coating. Once scratched by the outside, it will quickly rust and gradually spread. .

Therefore, those skilled in the art are working on developing a planting velvet spring, flocking only on the outer surface of the spring, increasing the inner diameter of the spring product as much as possible, using an elliptical cross-section of the wire, and reducing the spring longitudinal compression height of the spring. The product realizes miniaturization and light weight of the electric tailgate system. At the same time, a zinc-aluminum microchip flocking spring was developed, which replaced the electrophoretic coating with a zinc-aluminum micro-chip anti-rust coating. The zinc-aluminum micro-sheet coating belongs to a cathode sacrificial protective coating, even if there is external scratching, coating The layer will not rust, and the combination of zinc-aluminum microchip coating and flocking coating will greatly improve the rust-proof performance, and the zinc-aluminum micro-sheet coating is more environmentally friendly than the electrophoretic coating.

To achieve the above object, the present invention provides a planting spring comprising a spring body and a flocking coating, the flocking coating being disposed on a surface of the spring body, the flocking coating The surface is arranged with fluff.

Further, the flocking spring further includes a rustproof coating disposed on a surface of the spring body, the flocking coating being disposed on an outer layer of the rustproof coating.

Further, the rustproof coating is an electrophoretic coating or an alloy coating.

Further, the flocking coating is disposed only on an outer side surface of the spring body.

Further, the spring is flocked in a flocking device in a pressed state.

Further, the wire section of the spring body is an elliptical wire or a goose-shaped wire.

Further, the alloy coating is a zinc aluminum microchip coating.

Further, the zinc aluminum microchip coating is completed by dip coating or spraying, baking.

Further, the spring surface flocking coating is finished by flocking, flocking and drying processes.

Further, the spring surface flocking coating comprises a glue layer and fluff.

Further, the pile is nylon PA66 fluff.

Further, the type of the fluff is 3.3 dtex.

Further, the flocked coating has a thickness of 0.2 to 0.4 mm.

Further, the viscosity of the glue is 2500-3500 Cst.

Further, the rust preventive coating has a thickness of 15-20 microns.

At the same time, the present invention provides a clamp for manufacturing the flocking spring, comprising a metal plug, a stainless steel tube with a pin hole, a fixed metal block welded to the stainless steel tube, and a metal with a hole. The block has a diameter that matches the inner diameter of the spring, and the distance from the pin hole to the fixed metal block is the tightness of the spring.

The invention not only flocks on the outer surface of the spring but also flocks on the side of the spring on the basis of retaining the anti-rust and noise reduction of the traditional electric tailgate spring, and the invention replaces the original steel wire with an oval wire or a goose-shaped wire. The longitudinal compression and height of the spring allows the original smaller electric tailgate system to use the flocking spring, thus solving the noise problem. The invention replaces the circular steel wire with the elliptical steel wire, and reduces the longitudinal pressure and height of the spring, so that the original small electric tailgate system can also use the flocking spring, thereby solving the problem of noise. The invention replaces the electrophoretic coating with the zinc-aluminum microchip anti-rust coating, which greatly improves the anti-rust ability of the coating under the condition of normal damage and surface scratching, and reduces environmental pollution.

The concept, the specific structure and the technical effects of the present invention will be further described in conjunction with the accompanying drawings in order to fully understand the objects, features and effects of the invention.

附图说明DRAWINGS

Figure 1 is a spring in which only the outer surface of the spring is flocked according to a preferred embodiment of the present invention;

2 is a perspective view of an electric tailgate spring of an elliptical cross-section steel wire according to a preferred embodiment of the present invention;

Figure 3 is a cross-sectional view of an electric tailgate spring of an elliptical cross-section steel wire in accordance with a preferred embodiment of the present invention;

Figure 4 is a cross-sectional view of a spring wire of a zinc-aluminum microchip coating in combination with a flocked coating in accordance with a preferred embodiment of the present invention.

Among them, 1-spring body, 2-spring outer surface flocking layer, 3-wire, 4-electrophoretic coating, 5-gel layer, 6-fluff, 7-zinc aluminum microchip coating.

具体实施方式Detailed ways

The preferred embodiments of the present invention are described in the following description with reference to the accompanying drawings, in which The invention may be embodied in many different forms of embodiments, and the scope of the invention is not limited to the embodiments disclosed herein.

In the drawings, structurally identical components are denoted by the same reference numerals, and structural or functionally similar components are denoted by like reference numerals. The dimensions and thickness of each component shown in the drawings are arbitrarily shown, and the invention does not limit the size and thickness of each component. In order to make the illustration clearer, some parts of the drawing appropriately exaggerate the thickness of the parts.

Embodiment 1

In order to improve the electric tailgate springs with traditional inner and outer surfaces and flanking, more installation space is required, resulting in many electric tailgate systems with limited space. The flocking springs cannot be used to achieve noise reduction. For current flocking springs, The present invention designs a flocking spring solution that can be installed in a small space, and in the case of the same installation space, the spring shear stress can be made lower and the fatigue life is higher. The main technical solutions of the present invention are as follows:

As shown in FIG. 1 and FIG. 3, the flocking spring of the present invention comprises a spring body 1, an electrophoretic coating 4, and a flock layer 2 on the outer surface of the spring. The spring body 1 determines the mechanical properties and fatigue life of the spring in the system, and the electrophoretic coating. 4 Determine the anti-corrosion ability of the spring, the flock layer 2 on the outer surface of the spring, through the flocking fluff 6 on the glue layer 5, the spring of the spring body 1 and the outer tube of the spring are directly rubbed, thereby eliminating the friction between the spring body and the outer tube. Frictional noise.

The flocking spring of the invention breaks the traditional idea of flocking on the inner and outer surfaces of the whole spring, avoids flocking on the side of the spring, and flocks only on the outer surface of the spring, so that when the spring is completely pressed, the pressure and height are greatly reduced. Small, so that the spring that could not be installed into the system can be installed in the existing space, and the flocking and noise reduction can be realized without changing the structure of the system.

The flocking spring of the invention breaks the traditional idea of flocking on the entire spring surface, avoids flocking on the inner surface of the spring, and flocks only on the outer surface of the spring, so that the spring can be enlarged under the same system installation space. The wire diameter reduces the spring shear stress and thus increases the fatigue life of the spring.

The processing method of the present invention is as follows: after calculating the tightness of the spring (the spring and the state corresponding to the gap between the wires is zero), a spring-specific jig and a compression device corresponding to the jig are prepared according to the tightness height, The fixture comprises a metal pin, a stainless steel tube with a pin hole, a fixed metal block welded to the stainless steel tube, and a metal block with a hole. The diameter of the metal tube matches the inner diameter of the spring, and the pin hole is fixed to the metal block. The distance is the tight height of the spring. Firstly, the metal pipe of the clamp and the metal block welded on the metal pipe are mounted on the compression device, then the spring is loaded into the metal pipe, and the metal block with the hole is loaded into the metal pipe to start the compression device, and the spring is first compressed to In a fully tight state, insert the jack into the pin hole, then release the compression device and remove the clamp that contains the spring that has been pressed.

After the spring is pressed, the clamp and the spring are placed together in the flocking device. Since the spring is pressed, the inner surface and the side of the spring can be not flocked, and only the outer surface of the spring can be flocked. After the flocking is completed, the jig is clamped. The compression device is again loaded, the spring is released, and a spring is obtained in which only the outer surface is flocked.

Embodiment 2

In order to improve the electric tailgate spring made of the traditional round wire, more installation space is required, which leads to the fact that many electric tailgate systems with limited space cannot use the flocking spring to achieve the noise reduction effect. The present invention is designed for the current flocking spring. A flocking spring solution that can be installed in a small space, and with the same system installation space, the spring shear stress can be made lower and the fatigue life is higher. The main technical solutions of the present invention are as follows:

As shown in FIG. 1, FIG. 2 and FIG. 3, the flocking spring of the present invention comprises a spring body 1, an electrophoretic coating 4, and a spring surface flocking layer 2. The spring body 1 determines the mechanical properties and fatigue life of the spring in the system, and electrophoresis. The coating 4 determines the corrosion resistance of the spring, and the flock layer 2 of the spring surface, by flocking the fluff 6 on the glue layer 5, isolates the metal body of the spring body 1 and the outer tube of the spring from rubbing directly, thereby eliminating the friction between the spring body 1 and the outer tube And the friction noise generated.

The flocking spring of the invention breaks the traditional idea of an electric tailgate spring made of a circular steel wire, and adopts an elliptical steel wire or a goose-shaped steel wire, so that when the spring is fully pressed, the pressure and the height are greatly reduced, so that the original Springs that cannot be installed in the system can be installed in the existing space, and flocking and noise reduction can be realized without changing the structure of the system.

The flocking spring of the invention breaks the traditional idea of an electric tailgate spring made of a circular steel wire, and adopts an elliptical steel wire, thereby increasing the diameter of the spring wire and reducing the spring shear stress under the same installation space. Thereby increasing the fatigue life of the spring.

The solution of the present invention is as follows: according to customer-defined system boundary conditions, a spring is designed using a conventional circular steel wire, and then an elliptical steel wire having the same cross-sectional area is converted by an equivalent conversion of the diameter of the circular steel wire according to the cross-sectional area. A spring solution with a spring height (this state corresponds to zero gap between the wires) is greatly reduced, so the electric tailgate system, which was originally unable to use flocking to reduce noise due to the small longitudinal space, does not change any parameters. Next, solve the problem of noise.

Embodiment 3

In order to improve the traditional electrophoresis flocking electric tailgate spring, the salt spray effect is often weakened by the collision of the electrophoretic coating, resulting in the life of many electric tailgate systems being limited by the spring salt spray ability. For the current electrophoresis flocking spring, this The invention designs a bottom anti-rust coating with better anti-rust ability and more environmental protection. Even if there is external force causing the surface of the coating to be scratched, it has self-protection function without being corroded. The main technical solutions of the present invention are as follows:

As shown in FIG. 1 and FIG. 4, the flocking spring of the present invention comprises a spring body 1, a zinc-aluminum microchip coating 7, and a spring surface flocking coating 2, and the spring body 1 determines the mechanical properties and fatigue life of the spring in the system. The zinc-aluminum microchip coating 7 determines the corrosion resistance of the spring, and the flocking coating 2 on the spring surface, by flocking the fluff 6 in the glue layer 5, isolates the spring body metal and the spring outer tube from direct friction, eliminating the spring body and the outer Frictional noise generated by pipe friction.

The flocking spring of the invention breaks the idea of the traditional electrophoresis flocking spring, avoids the possibility of using the electrophoretic coating 4, and the coating is scratched to damage the salt spray effect, and the zinc-aluminum micro-sheet coating 7 is used as the bottom surface. The anti-rust coating greatly improves the anti-corrosion effect of the surface of the coating without being scratched and accidentally scratched, so that the problem that the entire electric tailgate system must be replaced in advance due to insufficient spring anti-rust ability is solved. Increased life of the electric tailgate system.

The flocking spring of the invention breaks the traditional idea of electrophoresis flocking, avoids the use of electrophoretic coating on the surface of the spring as the only anti-rust coating, and the entire process of the coating produces more waste water, waste gas and waste residue. The environment is polluted, and the zinc-aluminum microchip coating is a coating on the surface of the spring or sprayed with zinc-aluminum microchip coating, which is more environmentally friendly and easy to process.

The processing method of the invention is as follows: after the spring body 1 is subjected to polishing pretreatment, the zinc aluminum microchip coating 7 processing line is directly input, and the zinc aluminum microchip coating is completed by first dip coating or spraying, and then baking. Then, the spring of the zinc-aluminum microchip coating 7 will be put into the subsequent flocking coating 2 production line, and the flocking coating is completed by gluing, flocking and drying, thus obtaining a strong anti-corrosion ability. And zinc-aluminum flocking springs that eliminate system noise.

The above has described in detail the preferred embodiments of the invention. It should be understood that many modifications and variations can be made in the present invention without departing from the scope of the invention. Therefore, any technical solution that can be obtained by a person skilled in the art based on the prior art based on the prior art by logic analysis, reasoning or limited experimentation should be within the scope of protection determined by the claims.

Claims

a planting velvet spring, characterized in that the flocking spring comprises a spring body and a flocking coating, the flocking coating being arranged on a surface of the spring body, the surface of the flocking coating being arranged with fluff .
A flocking spring according to claim 1, wherein said flocking spring further comprises a rust preventive coating disposed on a surface of said spring body, said flocking coating being disposed on The outer layer of the rust preventive coating.
A flocking spring according to claim 1 wherein the rust preventive coating is an electrophoretic coating or an alloy coating.
A flocking spring according to claim 1 wherein said flocking coating is disposed only on an outer side surface of said spring body.
A flocking spring according to claim 1, wherein said spring is flocked in a flocking apparatus in a pressed state.
The flocking spring according to claim 1, wherein the wire portion of the spring body has an elliptical or goose-shaped cross section.
The flocking spring of claim 2 wherein said alloy coating is a zinc aluminum microchip coating.
The flocking spring of claim 7 wherein said zinc aluminum microchip coating is completed by dip coating or spraying and baking.
The flocked spring of claim 1 wherein said flocked coating is finished by a gumming, flocking and drying process.
The flocked spring of claim 1 wherein said flocking coating comprises at least a layer of glue.
The flocked spring of claim 1 wherein said pile is nylon PA66 fluff.
The flocked spring of claim 1 wherein said fluff is of a type of 3.3 dtex.
The flocking spring of claim 1 wherein said flocking coating has a thickness of from 0.1 to 0.3 mm.
A flocking spring according to claim 10, wherein said glue has a viscosity of from 2,500 to 3,500 Cst.
The flocking spring of claim 1 wherein said rust preventive coating has a thickness of from 15 to 20 microns.
A jig for making a flocking spring according to any one of claims 1 to 15, comprising a metal plug, a stainless steel tube with a pin hole, and a welded joint with the stainless steel tube A fixed metal block, a metal block with a hole, the diameter of the stainless steel pipe is matched with the inner diameter of the spring, and the distance from the pin hole to the fixed metal block is the tightness of the spring.