Anti-creeping electric heating steering wheel

Abstract

The utility model relates to the technical field of steering wheels, and discloses an anti-creeping electric heating steering wheel which comprises a steering wheel framework, a leather sleeve is sleeved on the outer side of the steering wheel framework, and an electric heating unit is arranged between the leather sleeve and the steering wheel framework. Compared with the prior art, the anti-creeping electric heating steering wheel has the following advantages that through cooperation of the steering wheel framework, the leather sleeve and the electric heating unit, the resistance wire is powered on during use, the resistance wire emits heat, heat is transmitted to the surface of the steering wheel through the insulating layer and the leather sleeve, the steering wheel is warmed, and the anti-creeping electric heating steering wheel can be used for a long time; according to the electric heating steering wheel, the coating layer on the outer side of the resistance wire is protected by the wear-resistant layer and the insulating layer, the local part of the coating layer is not easy to wear, so that the electric heating steering wheel has an excellent anti-creeping effect, the durability is greatly improved, the heat reflecting layer has a good heat reflecting effect, and the efficiency of transmitting heat of the resistance wire to the surface of the steering wheel can be improved to a certain extent.

Description

A leak-proof electrically heated steering wheel Technical Field

[0001] This utility model relates to the field of steering wheel technology, specifically to an electrically heated steering wheel that is leak-proof. Background Technology

[0002] The principle behind a heated steering wheel is to embed resistance wires inside the leather steering wheel. When electricity is applied, these wires heat up, raising the surface temperature of the steering wheel. Specifically, the power cable supplies power to the resistance wires through the connection point between the steering wheel and the pivot at the bottom of the wheel. Heating is primarily concentrated in the hand areas (at the 3 and 9 o'clock positions). In cold weather, a heated steering wheel can quickly warm the wheel, reducing hand discomfort and joint pain, thus improving driving comfort. Furthermore, heated hands are more flexible, contributing to improved driving stability and safety.

[0003] To ensure the stable and safe use of heated steering wheels, in addition to choosing reputable brands during the purchase process to ensure the product meets national safety standards and has relevant verification and testing reports, insulating material is also coated on the surface of the resistance wire to prevent leakage. Currently, most heated steering wheels initially meet the leakage prevention requirement. However, because the insulation of the resistance wire relies solely on a simple coating, over long-term use, the wire is frequently subjected to minor friction from the leather layer and the steering wheel frame. This can cause the insulation layer to crack, exposing parts of the metal resistance wire and increasing the risk of leakage. Therefore, durability needs improvement. Summary of the Invention

[0004] The purpose of this invention is to provide an electric heating steering wheel that prevents leakage, which can significantly improve the durability of the outer insulation layer of the resistance wire. The insulation layer also has excellent thermal conductivity. After long-term use, the electric heating steering wheel still has excellent leakage prevention effect and greatly improves durability, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electric heating steering wheel with leakage prevention, comprising a steering wheel frame, a leather cover fitted on the outer side of the steering wheel frame, an electric heating unit provided between the leather cover and the steering wheel frame, the electric heating unit comprising: a resistance wire, a coating layer on the outer wall of the resistance wire, a heat-reflecting layer on one side of the coating layer, a wear-resistant layer on the surface of the heat-reflecting layer away from the coating layer, the wear-resistant layer being fitted on top of the steering wheel frame, an insulating layer on the other side of the coating layer, the insulating layer being in contact with the inner surface of the leather cover, and a wire through hole provided on the outer wall of the steering wheel frame.

[0006] Preferably, the coating layer is connected to the insulating layer and the heat-reflecting layer respectively via an adhesive layer.

[0007] Preferably, the wear-resistant layer is sewn to the leather cover with stitching thread.

[0008] Preferably, a horizontal tube is fixed to the inner wall of the threading hole, and a plurality of flexible sheets are fixed to the inner wall of the horizontal tube, the flexible sheets being in contact with the coating layer.

[0009] Compared with the prior art, the beneficial effects of this utility model are: the leakage-proof electrically heated steering wheel has the following advantages over traditional technology:

[0010] Through the cooperation between the steering wheel frame, leather cover, and heating unit, the resistance wire is energized during use, causing it to heat up. The heat is then transferred to the steering wheel surface through the insulation layer and leather cover, warming it up. Over time, the coating on the outside of the resistance wire is protected by the wear-resistant layer and the insulation layer, preventing localized wear and tear. This gives the heated steering wheel excellent anti-leakage performance and significantly improved durability. The heat-reflecting layer also has a good heat-reflecting effect, which can improve the efficiency of transferring heat from the resistance wire to the steering wheel surface to a certain extent. Through the cooperation between the steering wheel frame, leather cover, heating unit, sewing thread, horizontal tube, and soft sheets, the wear-resistant layer and the leather cover are sewn together, which can improve the stability of the resistance wire between the insulation layer and the heat-reflecting layer to a certain extent. In addition, it can also make a stable connection between the heating unit and the leather cover, which facilitates the smooth assembly operation. The multiple soft sheets set on the inner wall of the horizontal tube can contact and press against the coating layer when the resistance wire passes through the wire hole, which can prevent the outer coating layer of the resistance wire from rubbing against the corner of the wire hole, thus protecting the outer coating layer of the resistance wire. Attached Figure Description

[0011] The above and other features, advantages, and aspects of the embodiments of this disclosure will become more apparent from the accompanying drawings and the following detailed description. Throughout the drawings, the same or similar reference numerals denote the same or similar elements. It should be understood that the drawings are schematic, and the originals and elements are not necessarily drawn to scale.

[0012] Figure 1 is a schematic diagram of the structure of this utility model;

[0013] Figure 2 is a partial top sectional view of Figure 1;

[0014] Figure 3 is a schematic diagram of the connection structure of the steering wheel frame, heating wire and leather cover in Figure 2;

[0015] Figure 4 is a schematic diagram of the connection structure of the steering wheel frame, cross tube and coating layer in Figure 2.

[0016] In the diagram: 1. Steering wheel frame, 2. Leather cover, 3. Resistance wire, 4. Coating layer, 5. Heat-reflecting layer, 6. Wear-resistant layer, 7. Insulating layer, 8. Adhesive layer, 9. Thread hole, 10. Sewing thread, 11. Horizontal tube, 12. Soft film. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please refer to Figures 1-4. This utility model provides a technical solution: an electric heating steering wheel with leakage prevention, including a steering wheel frame 1, a leather sleeve 2 fitted on the outer side of the steering wheel frame 1, an electric heating unit between the leather sleeve 2 and the steering wheel frame 1, the electric heating unit including: a resistance wire 3, a coating layer 4 on the outer wall of the resistance wire 3, a heat-reflecting layer 5 on one side of the coating layer 4, a wear-resistant layer 6 on the surface of the heat-reflecting layer 5 away from the coating layer 4, the wear-resistant layer 6 being fitted on the upper part of the steering wheel frame 1, an insulating layer 7 on the other side of the coating layer 4, the insulating layer 7 being in contact with the inner surface of the leather sleeve 2, and a wire hole 9 being opened on the outer wall of the steering wheel frame 1.

[0019] In the specific implementation process, it is worth noting that the steering wheel frame 1 is the main load-bearing component of the car steering wheel, usually made of magnesium-aluminum alloy or zinc alloy. Its design aims to ensure the stability and functionality of the steering wheel while reducing weight and cost. The steering wheel frame 1 has internal locations for the installation and wiring of control electrical components. The leather cover 2 is a product used to protect the car steering wheel, usually made of leather. Common materials for steering wheel leather covers 2 with good thermal conductivity include mink fur, sable fur, and suede, which have excellent thermal conductivity. The internal resistance wire 3 of the electric heating steering wheel is mainly made of nickel-chromium alloy and iron-chromium-aluminum alloy. The selection of these materials is based on their resistivity and high-temperature resistance. Chromium-aluminum alloys possess high resistivity and excellent high-temperature resistance, making them suitable for use in the resistance wires of heated steering wheels. These wires generate heat when energized and transfer it to the steering wheel through conduction, thus achieving the heating function. The resistance wire 3 generates heat when energized primarily due to the thermal effect produced when current flows through the resistor. When current passes through a conductor, free electrons collide with atoms in the conductor, converting their kinetic energy into heat energy, causing the conductor's temperature to rise. This phenomenon is known as the Joule effect, meaning that current flowing through a resistor generates heat. To simplify understanding, here's a brief explanation of the current power supply principle for the resistance wire 3 in heated steering wheels: the principle of steering wheel heating is actually quite simple: a layer of resistance wire 3 is placed inside the steering wheel leather. The power cord supplies power to the resistance wire through the connection point below the steering wheel and the pivot. The insulating coating layer 4 on the outside of the resistance wire 3 typically uses insulating varnish or insulating paint as the coating material. Insulating varnish is a coating with excellent electrical insulation properties, good electrochemical, thermal, mechanical, and chemical properties. It is usually based on high-molecular polymers and can be cured into an insulating film or insulating whole under certain conditions. The components of insulating varnish include base material, flame retardant, curing agent, pigments, fillers, and solvents. The heat-reflecting layer 5 is a ZS-221 heat-reflecting coating, composed of tiny ceramic spheres and polymer materials, with excellent reflective properties. Of course, other heat-reflecting coatings can also be used. The wear-resistant layer 6 is woven from aramid fiber filaments, possessing high strength, ultra-wear resistance, acid and alkali resistance, and heavy-duty properties. The insulation layer 7, made of silicone, boasts excellent electrical insulation properties, including lightweight construction, high resistivity, and strong breakdown voltage resistance, making it suitable for electrical insulation applications. The silicone also has a wide temperature range (-60℃ to 200℃), capable of withstanding the operating temperatures of the resistance wire. Furthermore, silicone is soft and highly malleable, easily wrapping the resistance wire and adapting to complex shapes. Notably, alumina ceramic particles are added to the silicone insulation layer 7. Alumina ceramic is a thermally conductive insulating material that performs exceptionally well in high-temperature environments, making it widely used in applications requiring extremely high temperature and corrosion resistance. The high thermal conductivity of alumina ceramic enhances the thermal conductivity of the insulation layer 7. Suitable silicone rubber, such as condensation-type or addition-type silicone rubber, is selected as the matrix material.Alumina particles: Select alumina ceramic particles with appropriate particle size (e.g., 5μm, 40μm) and morphology (e.g., spherical, near-spherical) according to requirements. Other additives: including silicone oil (e.g., dimethyl silicone oil), catalysts, coupling agents, etc. Alumina particle pretreatment and drying: Place the alumina particles in an electric heating forced-air drying oven and dry at 100℃ for 24 hours to remove moisture. Use coupling agents (e.g., silane coupling agents) to modify the surface of the alumina particles, improving their wettability and adhesion to silica gel, and reducing interfacial heat. To prevent this process, silicone rubber, silicone oil, and thermally conductive filler (alumina particles) are placed in a mechanical stirrer at a certain ratio and stirred at a constant speed for 10 minutes. A trace amount of catalyst is added, and stirring continues until the sample is homogeneous. The mixed material is then transferred to a mold and placed in a vacuum drying oven. A vacuum is applied at 0.08 MPa for 20 minutes to remove air bubbles. The mold is then placed in an electrically heated forced-air drying oven and kept at 120°C for 1 hour to allow the sample to solidify. This detailed description of the processing method is for ease of understanding and implementation, not to protect the processing techniques.

[0020] Furthermore, the coating layer 4 is connected to the insulating layer 7 and the heat-reflecting layer 5 respectively via the adhesive layer 8.

[0021] In the specific implementation process, it is worth noting that the adhesive layer 8 is epoxy resin glue, which is known for its excellent heat resistance and chemical resistance. Of course, the adhesive layer 8 can also be other high-temperature resistant non-toxic glue, which can improve the stability between the resistance wire 3 and the insulation layer 7 and the heat-reflecting layer 5.

[0022] Furthermore, the wear-resistant layer 6 is sewn to the leather cover 2 by sewing thread 10.

[0023] In the specific implementation process, it is worth noting that the sewing thread 10 is a Teflon insulated flame-retardant sewing thread, which is a common type of insulated sewing thread with excellent insulation and flame-retardant properties. It can improve the stability of the resistance wire 3 between the insulation layer 7 and the heat-reflecting layer 5 to a certain extent. In addition, it can also establish a stable connection between the heating unit and the leather sleeve 2, which facilitates the smooth progress of the assembly operation.

[0024] Furthermore, a horizontal tube 11 is fixed to the inner wall of the wire hole 9, and a plurality of flexible sheets 12 are fixed to the inner wall of the horizontal tube 11, with the flexible sheets 12 abutting against the coating layer 4.

[0025] In the specific implementation process, it is worth noting that the multiple flexible sheets 12 set on the inner wall of the horizontal tube 11 can contact and press against the coating layer 4 when the resistance wire 3 passes through the wire hole 9. This can prevent friction between the outer coating layer 4 of the resistance wire 3 and the corner of the wire hole 9, and can protect the outer coating layer 4 of the resistance wire 3. The flexible sheets 12 and the insulating layer 7 are made of the same material.

[0026] Working principle:

[0027] Before installing the leather cover 2 on the outside of the steering wheel frame 1, the heating unit must first be installed on the outside of the steering wheel frame 1. Part of the resistance wire 3 is then inserted through the wiring hole 9 into the interior of the steering wheel frame 1 and electrically connected to the vehicle's power supply components. Next, the leather cover 2 can be installed on the outside of the heating unit. During subsequent use, the resistance wire 3 is energized, causing it to heat up. This heat is transferred through the insulation layer 7 and the leather cover 2 to the surface of the steering wheel, warming it and preventing the driver from feeling cold when holding it. This reduces hand discomfort and joint pain, improving driving comfort. Furthermore, the heated hands are more flexible, contributing to improved driving stability and safety. During long-term use, the coating layer 4 on the outside of the resistance wire 3 is protected by the wear-resistant layer 6 and the insulation layer 7. The coating layer 4 is not easily worn, giving the heated steering wheel excellent anti-leakage performance and significantly improved durability. The heat-reflecting layer 5 also has a good heat-reflecting effect, improving the efficiency of heat transfer from the resistance wire 3 to the steering wheel surface. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A leakage-proof electrically heated steering wheel, comprising a steering wheel frame (1), characterized in that: The steering wheel frame (1) is fitted with a leather cover (2) on the outside. An electric heating unit is provided between the leather cover (2) and the steering wheel frame (1). The electric heating unit includes a resistance wire (3). The outer wall of the resistance wire (3) is provided with a coating layer (4). A heat-reflecting layer (5) is provided on one side of the coating layer (4). A wear-resistant layer (6) is provided on the surface of the heat-reflecting layer (5) away from the coating layer (4). The wear-resistant layer (6) is fitted on the top of the steering wheel frame (1). An insulating layer (7) is provided on the other side of the coating layer (4). The insulating layer (7) is in contact with the inner surface of the leather cover (2). A wire hole (9) is opened on the outer wall of the steering wheel frame (1).

2. The electric heating steering wheel with leakage prevention according to claim 1, characterized in that: The coating layer (4) is connected to the insulating layer (7) and the heat-reflecting layer (5) respectively through the adhesive layer (8).

3. The electric heating steering wheel with leakage prevention according to claim 1, characterized in that: The wear-resistant layer (6) is sewn to the leather cover (2) by sewing thread (10).

4. The electric heating steering wheel with leakage prevention according to claim 1, characterized in that: A horizontal tube (11) is fixed to the inner wall of the thread hole (9), and a plurality of soft sheets (12) are fixed to the inner wall of the horizontal tube (11). The soft sheets (12) are pressed against the coating layer (4).

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