阅读说明：本技术 一种汽车饰板热熔柱结构 (Hot melting column structure of automobile decorative plate ) 是由 方立锋 张熊波 周宝聪 马永兴 于 2021-08-04 设计创作，主要内容包括：本发明公开了一种汽车饰板热熔柱结构,包括汽车饰板和连接板体,汽车饰板上设置有空心柱体,连接板体上设置有与空心柱体相配合的连接孔,连接孔的一端设置有圆环凸台,空心柱体的内壁上设置有两个环形槽,两个环形槽沿着空心柱体的轴向排列,两个环形槽中均设置有热扩张环。本发明能够使热熔柱端部在受热熔化后形成直径较大的蘑菇头结构,使得空心柱体不容易从连接孔中拔出,有效提高了汽车饰板与连接板体之间的连接强度。(The invention discloses a hot-melting column structure of an automobile decorative plate, which comprises the automobile decorative plate and a connecting plate body, wherein a hollow cylinder is arranged on the automobile decorative plate, a connecting hole matched with the hollow cylinder is formed in the connecting plate body, a circular ring boss is arranged at one end of the connecting hole, two annular grooves are formed in the inner wall of the hollow cylinder, the two annular grooves are arranged along the axial direction of the hollow cylinder, and a thermal expansion ring is arranged in each of the two annular grooves. The invention can ensure that the end part of the hot melting column forms a mushroom head structure with larger diameter after being heated and melted, so that the hollow column body is not easy to pull out from the connecting hole, and the connecting strength between the automobile decorative plate and the connecting plate body is effectively improved.)

1. The utility model provides an automobile trim board hot melt post structure, includes automobile trim board and connection plate body, is provided with hollow cylinder on the automobile trim board, be provided with on the connection plate body with hollow cylinder matched with connecting hole, its characterized in that: one end of the connecting hole is provided with a circular ring boss, the inner wall of the hollow cylinder body is provided with two annular grooves, the two annular grooves are arranged along the axial direction of the hollow cylinder body, and the two annular grooves are both provided with a thermal expansion ring.

2. The hot melt pillar structure of an automobile trim panel according to claim 1, wherein the thermal expansion ring comprises a plurality of arc-shaped elastic pieces, the end portions of two adjacent arc-shaped elastic pieces are connected through a thermal bending part, the thermal bending part is in a 'U' shape, the two ends of the thermal bending part are respectively connected with the end portions of the two arc-shaped elastic pieces, the thermal bending part comprises an inner metal layer and an outer metal layer, and the thermal expansion coefficient of the inner metal layer is greater than that of the outer metal layer; a limiting mechanism is further arranged between the end parts of two adjacent arc-shaped elastic pieces and comprises a sleeve and a sliding rod matched with the sleeve, the sleeve is fixed at the end part of one of the arc-shaped elastic pieces, the sliding rod is fixed at the end part of the other arc-shaped elastic piece, and the sliding rod is connected in the sleeve in a sliding manner; a guide groove is formed in the side face of the sliding rod, a telescopic block is connected in the guide groove in a sliding mode, and a spring is arranged between the telescopic block and the bottom of the guide groove; the inner wall of the sleeve is provided with a clamping groove matched with the telescopic block.

3. A heat stake structure of an automobile trim panel as set forth in claim 2, wherein said arc-shaped elastic piece is made of spring steel.

4. A vehicle trim panel heat stake structure as set forth in claim 2, wherein said heat expansion ring comprises four arcuate resilient segments.

5. The hot melt pillar structure for an automobile trim panel according to claim 1, 2, 3 or 4, wherein a distance between one of the annular grooves and the end surface of the hollow pillar is 8 to 10 mm, and a distance between the other annular groove and the end surface of the hollow pillar is 15 to 20 mm.

6. A heat stake structure of automobile trim panel according to claim 1, 2, 3 or 4, wherein the hollow stake body is integrally formed with the automobile trim panel.

7. A hot melt pillar structure of an automobile trim panel according to claim 1, 2, 3 or 4, wherein the wall thickness of the hollow cylinder is 4-6 mm.

Technical Field

The invention relates to a hot-melting column structure, in particular to a hot-melting column structure of an automobile decorative plate.

Background

The automobile decorative plate is generally made of plastic, and a hot-melting column structure is usually arranged on the automobile decorative plate and is used for being matched with a connecting hole in a corresponding connecting plate body to be fixedly connected with the connecting plate body. The hot-melting column is a hollow column structure arranged on the automobile decorative plate, when the automobile decorative plate is connected with the connecting plate body, the mounting position is found firstly, the hollow column body on the automobile decorative plate is inserted into the connecting hole (the diameter of the connecting hole is slightly larger than that of the hot-melting column) on the connecting plate body, one end of the hollow column body penetrates through the connecting hole and extends out of the connecting hole for a certain distance, then the end part of the hollow column body is heated through a corresponding welding device to be melted, the end part of the melted hollow column body can deform towards the radial outer side, so that the end part of the hollow column body forms a mushroom head structure with the diameter larger than that of the connecting hole, and the mushroom head structure plays a role in limiting, and the interior decorative plate is fixed on the automobile body.

When an existing automobile plaque plate is installed, the end of the hollow column body is heated and melted, the deformation amount of the end of the hollow column body towards the radial outer side is small, the end of the hollow column body cannot form a mushroom head structure with a large enough diameter, when the interior plaque plate is subjected to large drawing force, the hollow column body is easily drawn out from a connecting hole, and therefore the automobile plaque plate is easily separated from a connecting plate body.

Disclosure of Invention

The invention aims to solve the problems that when an existing automobile decorative plate is installed, the end part of a hollow column body is heated and melted, the deformation amount of the end part of the hollow column body towards the radial outer side is small, the end part of the hollow column body cannot form a mushroom head structure which is large enough and large enough in diameter, and when the automobile decorative plate is subjected to large drawing force, the hollow column body is easily drawn out of a connecting hole, so that the automobile decorative plate is separated from a connecting plate body.

The purpose of the invention is realized by the following technical scheme: the utility model provides an automobile trim board hot melt post structure, includes automobile trim board and connecting plate body, is provided with hollow cylinder on the automobile trim board, is provided with on the connecting plate body with hollow cylinder matched with connecting hole, the one end of connecting hole is provided with the ring boss, is provided with two ring channels on the inner wall of hollow cylinder, two ring channels are arranged along the axial of hollow cylinder, all are provided with the heat expansion ring in two ring channels.

In the invention, two thermal expansion rings are arranged on the inner side of the hot melting column, the two thermal expansion rings are arranged up and down, the thermal expansion ring positioned above is closer to the end surface of the hollow column body, and the thermal expansion ring positioned below is farther from the end surface of the hollow column body. The thermal expansion ring expands in diameter when heated. When the tip of hollow cylinder was heated and is melted, the hollow cylinder part of the hot expansion ring position of top can be heated and melt, and the hot expansion ring of top this moment is heated, and the diameter expansion, this hot expansion ring diameter expansion back can make the tip of hollow cylinder to expand towards radial outside to help forming the great mushroom head structure of a diameter at the tip of hollow cylinder, make the cylinder be difficult to be extracted from the connecting hole, effectively improved the joint strength between car plaque and the connection plate body. Simultaneously, the hollow cylinder part of the thermal expansion ring position of below is located the inboard of ring boss, the hollow cylinder part of the thermal expansion ring position of below also is in melting or half molten state after being heated, the thermal expansion ring of below is heated the back, the diameter expansion, this thermal expansion ring diameter expansion back, can impel the hollow cylinder of this position department to expand outwards until expanding tightly with ring boss inner wall, thereby eliminated the radial clearance between hollow cylinder and the ring boss, thereby avoided the hollow cylinder to take place radial drunkenness in the ring boss. The invention can ensure that the end part of the hot melting column forms a mushroom head structure with larger diameter after being heated and melted, so that the hollow column body is not easy to pull out from the connecting hole, and the connecting strength between the automobile decorative plate and the connecting plate body is effectively improved.

Preferably, the thermal expansion ring comprises a plurality of arc-shaped elastic sheets, the end parts of two adjacent arc-shaped elastic sheets are connected through a thermal bending part, the thermal bending part is U-shaped, the two ends of the thermal bending part are respectively connected with the end parts of the two arc-shaped elastic sheets, the thermal bending part comprises an inner metal layer and an outer metal layer, and the thermal expansion coefficient of the inner metal layer is greater than that of the outer metal layer; a limiting mechanism is further arranged between the end parts of two adjacent arc-shaped elastic pieces and comprises a sleeve and a sliding rod matched with the sleeve, the sleeve is fixed at the end part of one of the arc-shaped elastic pieces, the sliding rod is fixed at the end part of the other arc-shaped elastic piece, and the sliding rod is connected in the sleeve in a sliding manner; a guide groove is formed in the side face of the sliding rod, a telescopic block is connected in the guide groove in a sliding mode, and a spring is arranged between the telescopic block and the bottom of the guide groove; the inner wall of the sleeve is provided with a clamping groove matched with the telescopic block. When the welding device heats the end part of the hollow cylinder, the heating temperature of the thermal expansion ring rises, and because the thermal expansion coefficient of the inner metal layer of the thermal bending part is larger than that of the outer metal layer, the two ends of the thermal bending part can be outwards expanded after the thermal bending part is heated, so that the overall diameter of the thermal expansion ring is increased; the both ends of hot bending part are at outside open in-process, the slide bar can stretch out certain distance from the sleeve, when the both ends of hot bending part opened certain degree, flexible piece on the slide bar just moved the position at draw-in groove place, flexible piece is gone into under the effect of spring the draw-in groove this moment, make locking between slide bar and the sleeve, thereby make the diameter of whole heat expansion ring fixed get off, the unable shrink of diameter of heat expansion ring, avoided hot melt column tip to make the heat expansion ring diameter take place to shrink and influence the formation of mushroom head structure because of the temperature drop in cooling process like this.

Preferably, the arc-shaped elastic piece is made of spring steel.

Preferably, the thermal expansion ring comprises four arcuate elastic pieces.

Preferably, the distance between one annular groove and the end face of the hollow column body is 8-10 mm, and the distance between the other annular groove and the end face of the hollow column body is 15-20 mm.

Preferably, the hollow cylinder is integrally formed with the automobile trim panel.

Preferably, the wall thickness of the hollow cylinder is 4-6 mm.

The invention has the beneficial effects that: the invention can ensure that the end part of the hot melting column forms a mushroom head structure with larger diameter after being heated and melted, so that the hollow column body is not easy to pull out from the connecting hole, and the connecting strength between the automobile decorative plate and the connecting plate body is effectively improved.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of a thermal expansion ring.

Fig. 3 is an enlarged view of a portion a in fig. 2.

In the figure: 1. the automobile decorative plate comprises an automobile decorative plate body, 2, a connecting plate body, 3, a circular ring boss, 4, a hollow cylinder body, 5, a thermal expansion ring, 6, an arc-shaped elastic sheet, 8, an inner side metal layer, 9, an outer side metal layer, 10, a sleeve, 11, a sliding rod, 12, a guide groove, 13, a telescopic block, 14, a spring, 15 and a clamping groove.

Detailed Description

The invention is further described by the following detailed description in conjunction with the accompanying drawings.

Example 1:

as shown in fig. 1 to 3, a heat stake structure of an automobile trim panel includes an automobile trim panel 1 and a connection plate body 2. The automobile trim panel 1 is made of plastic. The automobile decorative plate 1 is provided with a hollow column 4. The hollow column 4 is integrally formed with the automobile trim panel 1. The wall thickness of the hollow cylinder 4 is 4-6 mm. The connecting plate body 2 is provided with a connecting hole matched with the hollow column body 4, and the aperture of the connecting hole is slightly larger than the outer diameter of the hollow column body 4. One end of the connecting hole is provided with a circular boss 3, and the inner diameter of the circular boss 3 is the same as the aperture of the connecting hole. Two annular grooves are arranged on the inner wall of the hollow column body 4 and are arranged along the axial direction of the hollow column body 4. The distance between one of the annular grooves and the end face of the hollow column body is 8-10 mm, and the distance between the other annular groove and the end face of the hollow column body is 15-20 mm. One of the annular grooves is positioned on the inner side of the circular ring boss, and the other annular groove is higher than the circular ring boss. Thermal expansion rings 5 are arranged in both annular grooves.

The thermal expansion ring 5 includes four arc-shaped elastic pieces 6. The arc-shaped elastic pieces 6 are made of spring steel. The ends of two adjacent arc-shaped elastic sheets 6 are connected through a thermal bending part. The hot-bending part is U-shaped. Two ends of the hot bending part are respectively connected with the end parts of the two arc-shaped elastic sheets 6. The thermally bent part includes an inner metal layer 8 and an outer metal layer 9, and the inner metal layer 8 has a thermal expansion coefficient larger than that of the outer metal layer 9. And a limiting mechanism is also arranged between the end parts of the two adjacent arc-shaped elastic pieces 6. The limiting mechanism comprises a sleeve 10 and a sliding rod 11 matched with the sleeve 10, the sleeve 10 is fixed at the end part of one of the arc-shaped elastic pieces 6, the sliding rod 11 is fixed at the end part of the other arc-shaped elastic piece 6, and the sliding rod 11 is connected in the sleeve 10 in a sliding mode. A guide groove 12 is formed in the side face of the sliding rod 11, a telescopic block 13 is connected in the guide groove 12 in a sliding mode, and a spring 14 is arranged between the telescopic block 13 and the bottom of the guide groove 12. The inner wall of the sleeve 10 is provided with a clamping groove 15 matched with the telescopic block 13.

In the invention, two thermal expansion rings are arranged on the inner side of the hot melting column, the two thermal expansion rings are arranged up and down, the thermal expansion ring positioned above is closer to the end surface of the hollow column body, and the thermal expansion ring positioned below is farther from the end surface of the hollow column body. The thermal expansion ring expands in diameter when heated. When the tip of hollow cylinder was heated and is melted, the hollow cylinder part of the hot expansion ring position of top can be heated and melt, and the hot expansion ring of top this moment is heated, and the diameter expansion, this hot expansion ring diameter expansion back can make the tip of hollow cylinder to expand towards radial outside to help forming the great mushroom head structure of a diameter at the tip of hollow cylinder, make the cylinder be difficult to be extracted from the connecting hole, effectively improved the joint strength between car plaque and the connection plate body. Simultaneously, the hollow cylinder part of the thermal expansion ring position of below is located the inboard of ring boss, the hollow cylinder part of the thermal expansion ring position of below also is in melting or half molten state after being heated, the thermal expansion ring of below is heated the back, the diameter expansion, this thermal expansion ring diameter expansion back, can impel the hollow cylinder of this position department to expand outwards until expanding tightly with ring boss inner wall, thereby eliminated the radial clearance between hollow cylinder and the ring boss, thereby avoided the hollow cylinder to take place radial drunkenness in the ring boss.

The working principle of the thermal expansion ring is as follows: when the welding device heats the end part of the hollow cylinder, the heating temperature of the thermal expansion ring rises, and because the thermal expansion coefficient of the inner metal layer of the thermal bending part is greater than that of the outer metal layer, the two ends of the thermal bending part can be outwards expanded after the thermal bending part is heated, so that the overall diameter of the thermal expansion ring is increased; the both ends of hot bending part are at outside open in-process, the slide bar can stretch out certain distance from the sleeve, when the both ends of hot bending part opened certain degree, flexible piece on the slide bar just moved the position at draw-in groove place, flexible piece is gone into under the effect of spring the draw-in groove this moment, make locking between slide bar and the sleeve, thereby make the diameter of whole heat expansion ring fixed get off, the unable shrink of diameter of heat expansion ring, avoided hot melt column tip to make the heat expansion ring diameter take place to shrink and influence the formation of mushroom head structure because of the temperature drop in cooling process like this.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.