Flexible gluing head

Abstract

The invention discloses a flexible gluing head and belongs to the field of gluing, the flexible gluing head comprises a glue outlet pipe, an elastic pressing piece and a flexible glue outlet head, the flexible glue outlet head is connected to the output end of the glue outlet pipe, the output end of the flexible glue outlet head is provided with a limiting clamping groove, the bottom of the limiting clamping groove is provided with a glue outlet, one end of the elastic pressing piece abuts against the glue outlet pipe, and the other end of the elastic pressing piece abuts against the glue outlet pipe. The other end of the elastic pressing piece is clamped in the limiting clamping groove, the elastic pressing piece is further connected with the glue outlet pipe through an elastic piece, the other end of the elastic pressing piece is connected with a limiting clamping head, and the limiting clamping head abuts against one side of the limiting clamping groove. According to the gluing head, the adjusting chucks with different widths can be adopted and the height of the gluing head can be adjusted according to different demands of the plane sealing silicon rubber, so that different coating widths and thicknesses are realized, the consumption of the plane sealing silicon rubber is reduced, accumulation of the plane sealing silicon rubber after installation is reduced, and potential quality problems are avoided.

Description

Technical Field

[0001] The present invention relates to the field of glue application, and more specifically, to a flexible glue applicator head. Background Art

[0002] During the general assembly of an engine, many parts need to be sealed with planar-sealing silicone rubber, such as the sealing of the flywheel housing, gear chamber, oil pan, etc. The planar-sealing silicone rubber is applied to the sealing surface of the parts and, after being compressed, fills the tiny gaps on the sealing surface to achieve sealing. In traditional production methods, manual or pneumatic glue guns are generally used for manual glue application. The width and position of the glue line in manual glue application are manually controlled by the operators, resulting in poor consistency.

[0003] To improve efficiency and glue application quality, automated production lines generally use robots in combination with glue applicators for glue application. Robot glue application can accurately control the glue application position. The glue applicator head in robot glue application generally uses a rigid metal or hard plastic round-hole glue applicator head, and the applied glue line is cylindrical. To avoid damage to the sealing surface of the parts caused by the glue applicator head touching them, the glue applicator head needs to maintain a certain distance. And to prevent the sealing silicone rubber from not falling onto the pressure-bearing surface, resulting in sealing failure, more sealing silicone rubber needs to be applied to increase the glue line. After the parts are joined together, the glue line is compressed, and the excess sealing silicone rubber will be squeezed to both sides of the sealing surface, not only causing waste of the sealing silicone rubber, but for parts such as the flywheel housing and gear chamber with gears installed inside, when the internal combustion engine is running, the gears rotate at high speed, which will scrape off the accumulated planar-sealing silicone rubber and drop it into the internal oil cavity of the internal combustion engine, possibly causing blockage of the oil pipeline and resulting in insufficient oil pressure, making the internal combustion engine unable to work properly. The conventional method is to machine a chamfer around the inner side of the sealing surface of parts that need to be sealed with glue, such as the flywheel housing and gear chamber, to store the extruded planar-sealing silicone rubber and avoid the planar-sealing silicone rubber from touching the gears after extrusion. However, this method not only causes waste of the planar-sealing silicone rubber, but also adds additional machining content to the parts, resulting in an increase in the cost of the parts. Summary of the Invention

[0004] To overcome the defects of the prior art, the present invention provides a flexible glue applicator head, which can smooth the sealing silicone rubber during the glue application process. On the premise of ensuring the sealing effect, it can not only reduce the consumption of the sealing silicone, but also avoid the accumulation of the sealing silicone rubber after installation.

[0005] To achieve this purpose, the present invention adopts the following technical solutions.

[0006] The present invention provides a flexible glue applicator head, which includes a glue outlet pipe, an elastic pressing piece, and a flexible glue outlet head. The flexible glue outlet head is connected to the output end of the glue outlet pipe. A limiting card slot is provided at the output end of the flexible glue outlet head, and a glue outlet is provided at the bottom of the limiting card slot. One end of the elastic pressing piece abuts against the glue outlet pipe, and the other end of the elastic pressing piece is clamped in the limiting card slot. An elastic member is also connected between the elastic pressing piece and the glue outlet pipe. A limiting card head is connected to the other end of the elastic pressing piece, and the limiting card head abuts against one side of the limiting card slot.

[0007] In a preferred technical solution of the present invention, the elastic pressing piece includes a support plate and a pressing piece body. The pressing piece body is a trapezoidal sheet body, and the support plate is fixedly connected to the wider end of the pressing piece body. The limiting card head is fixedly connected to the narrower end of the pressing piece body.

[0008] In a preferred technical solution of the present invention, the glue outlet pipe includes a pipe seat and a flexible hose. The pipe seat is connected to the flexible hose, and the flexible glue outlet head is connected to the output end of the flexible hose.

[0009] In a preferred technical solution of the present invention, an arc-shaped connection port is provided on the support plate, a pressing piece card slot is opened on the outer wall of the pipe seat, and the support plate is clamped on the pressing piece card slot through the arc-shaped connection port.

[0010] In a preferred technical solution of the present invention, a first hook ring is provided at the bottom of the pressing piece body, a second hook ring is provided on the outer wall of the pipe seat, and the elastic member is a spring. The two ends of the spring are respectively connected to the first hook ring and the second hook ring.

[0011] In a preferred technical solution of the present invention, the flexible hose is tapered, the flexible hose is injection molded with flexible pipe plastic, and the flexible hose is integrally fixed to the glue seat by hot melting.

[0012] In a preferred technical solution of the present invention, the glue outlet is a rectangular opening, and the width of the limiting card head is greater than the width of the limiting card slot.

[0013] In a preferred technical solution of the present invention, the height of the cut of the glue outlet is 1 / 3 of the diameter of the flexible glue outlet head.

[0014] The beneficial effects of the present invention are as follows: A flexible glue applicator head provided by the present invention replaces the traditional rigid glue applicator head with a flexible glue outlet head made of flexible materials, and can cooperate with automated equipment such as robots to position the glue applicator head directly above the sealing surface of the assembled parts and keep it pressed for a certain length to make up for the machining errors of the parts, prevent the glue head from moving away from or hitting the parts due to the dimensional errors of the parts, and keep the glue applicator head always in contact with the sealing surface of the parts for gluing.

[0015] By setting the glue outlet in cooperation with the elastic pressing piece with an elastic member, the limit chuck can be made to fit the glue outlet, and the planar sealing silicone rubber can be evenly coated on the sealing surface immediately after the glue is discharged.

[0016] This glue applicator head can, according to different requirements for the planar sealing silicone rubber, adopt adjusting chucks with different widths and adjust the height of the glue applicator head to achieve different coating widths and thicknesses, reduce the consumption of the planar sealing silicone rubber, reduce the accumulation of the planar sealing silicone rubber after installation, and avoid potential quality problems. Brief Description of the Drawings

[0017] Figure 1 is a schematic structural view of a flexible glue applicator head provided in the specific embodiment of the present invention during use; Figure 2 is Figure 1 a schematic view of the free state of the flexible glue applicator head in Figure 3 is Figure 2 a schematic structural view of the glue outlet pipe in Figure 4 is Figure 2 a schematic structural view of the elastic pressing piece in Figure 5 is Figure 2 an enlarged schematic structural view of the flexible glue outlet head and the limit card slot in Figure 6 is Figure 6 the bottom view of

[0018] In the figure: 1, engine block; 2, glue outlet pipe; 3, elastic pressing piece; 4, elastic member; 21, pipe seat; 211, pressing piece card slot; 22, first hook ring; 23, hose; 231, flexible glue outlet head; 232, limit card slot; 233, glue outlet; 234, large end of the hose; 31, support plate; 32, pressing piece body; 321, limit chuck; 33, second hook ring. Specific Embodiment

[0019] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific embodiments.

[0020] As Figures 1-6As shown in the figure, in the embodiment, the present invention provides a flexible glue applicator head, which includes a glue outlet pipe 2, an elastic pressing piece 3, and a flexible glue outlet head 231. The flexible glue outlet head 231 is connected to the output end of the glue outlet pipe 2. A limiting card slot 232 is provided at the output end of the flexible glue outlet head 231, and a glue outlet 233 is provided at the bottom of the limiting card slot 232. One end of the elastic pressing piece 3 abuts against the glue outlet pipe 2, and the other end of the elastic pressing piece 3 is clamped in the limiting card slot 232. An elastic member 4 is also connected between the elastic pressing piece 3 and the glue outlet pipe 2. A limiting card head 321 is connected to the other end of the elastic pressing piece 3, and the limiting card head 321 abuts against one side of the limiting card slot 232.

[0021] When applying glue to the sealing surface of the engine block 1, the glue outlet pipe 2 is connected to the output end of an automatic glue applicator to transmit and control the glue output. Under the tension of the elastic member 4, the elastic pressing piece 3 closely adheres to the upper part of the glue outlet pipe 2, and the other end of the elastic pressing piece 3 can also be continuously clamped into the limiting card slot 232, and the limiting card head 321 can also continuously abut against one side of the glue outlet 233. The part of the elastic pressing piece 3 clamped in the limiting card slot 232 is relatively thin and has a certain deformation ability. Under the action of the elastic member 4, during the glue application process, it can deform along with the flexible glue outlet head 231, ensuring that the planar sealing silicone rubber can be leveled to the required thickness by the elastic pressing piece 3 and the limiting card head 321 after being extruded from the flexible glue outlet head 231.

[0022] Further, the elastic pressing piece 3 includes a support plate 31 and a pressing piece body 32. The pressing piece body 32 is a trapezoidal sheet body. The support plate 31 is fixedly connected to the wide end of the pressing piece body 32, and the limiting card head 321 is fixedly connected to the narrow end of the pressing piece body 32.

[0023] The width of the end of the pressing piece body 32 connected to the limiting card head 321 is smaller than that of the limiting card slot 232, and the limiting card head 321 is wider than the width of the flexible glue outlet head 231. During the glue application operation, usually the end glue application width is 3 - 8 mm. The support plate 31 presses on the glue outlet pipe 2, and the limiting card head 321 at the end of the pressing piece body 32 cooperates with the limiting card slot 232 to position the pressing piece body 32 on the glue outlet pipe 2, and under the action of the elastic member 4, the pressing piece body 32 is tightly pressed on the glue outlet pipe 2.

[0024] Further, the glue outlet pipe 2 includes a pipe seat 21 and a hose 23. The pipe seat 21 is connected to the hose 23, and the flexible glue outlet head 231 is connected to the output end of the hose 23. The hose 23 is tapered. The hose 23 is formed by plastic injection molding of a flexible pipe, and the hose 23 is integrally fixed to the glue seat by hot melting. The end of the hose 23 connected to the pipe seat 21 is the large end of the hose 234. The wall of the large end of the hose 234 is thicker, while the wall near the glue outlet head is thinner, realizing that the large end of the hose 234 is not easily deformed during the working process, and the flexible glue outlet head 231 is softer and can deform to different degrees according to the distance between the glue applicator head and the surface of the part. Further, an arc-shaped connection port is provided on the support plate 31, and a pressing piece slot 211 is formed on the outer wall of the pipe seat 21. The support plate 31 is clamped on the pressing piece slot 211 through the arc-shaped connection port.

[0025] Through the settings of the connection port and the pressing piece slot 211, the support plate 31 is clamped to the pipe seat 21 to prevent the elastic pressing piece 3 from shifting during the glue coating process.

[0026] Further, a first hook ring 22 is provided at the bottom of the pressing piece body 32, a second hook ring 33 is provided on the outer wall of the pipe seat 21, and the elastic member 4 is a spring. The two ends of the spring are respectively connected to the first hook ring 22 and the second hook ring 33.

[0027] The pipe seat 21 and the first hook ring 22 are integrally processed from a metal or hard plastic material. The pressing piece body 32 and the pipe seat 21 are tightened by the spring, so that the elastic pressing piece 3 is tightly pressed above the glue outlet pipe 2.

[0028] Further, the glue outlet 233 is a rectangular opening, and the width of the limit clamping head 321 is greater than the width of the limit clamping slot 232. The height of the cut of the glue outlet 233 is 1 / 3 of the diameter of the flexible glue outlet head 231. The width of the glue outlet 233 is half of the width of the limit clamping head 321, and at the same time, the glue outlet 233 is flush with the limit clamping head 321. When applying glue, 2 / 3 of the glue in the flexible glue outlet head 231 is blocked by the limit clamping head 321. The height difference from the bottom of the limit clamping head 321 to the bottom of the glue outlet 233 can be designed according to different requirements for the glue application amount, generally 0.5 - 1 mm. When the planar sealing silicone rubber is extruded through the glue outlet 233, 2 / 3 of the planar sealing silicone rubber above is blocked by the limit clamping head 321 and cannot be normally extruded from the end, and is squeezed to both sides of the glue outlet 233. As the planar sealing silicone rubber is extruded and the glue application head moves, the limit clamping head 321 uses its wider end to scrape the extruded planar sealing silicone rubber flat on the sealing surface. When the width of the limit clamping head 321 is designed to be 4 mm and the height from the bottom of the limit clamping head 321 to the bottom of the glue outlet 233 is designed to be 0.5 mm, it is possible to evenly apply the planar sealing silicone rubber into a glue surface with a width of 4 mm and a thickness of 0.5 mm.

[0029] During operation, the flexible glue - applying head can be clamped at the end of an automatic glue - applying device such as a six - axis robot or a three - axis glue - applying machine. Adjust the working coordinates of the six - axis glue - applying robot or the three - axis glue - applying machine to make the flexible glue - applying head closely adhere to the surface of the glue - applying part. According to the limit tolerance of the assembly and positioning of the glue - applying part, calculate the maximum offset of the surface of the glue - applying part relative to the automatic glue - applying device by subtracting the lower limit tolerance from the upper limit tolerance. Then, adjust the working coordinates of the six - axis glue - applying robot or the three - axis glue - applying machine again according to the maximum offset, and make the flexible glue - applying head press against the sealing surface direction by the maximum offset, then the automatic glue - applying operation can be carried out. During the glue - applying process, since the flexible glue - applying head has been pre - pressed by a distance exceeding the maximum offset of the glue - applying surface, even if the part size has deviation, the flexible glue - applying head can always ensure that the glue - applying head closely adheres to the part sealing surface. And, through the limit chuck 321 at the end of the elastic pressing piece 3, a small amount of planar - sealing silicone rubber can be smoothed into a wider glue surface, reducing the amount of planar - sealing silicone rubber used and avoiding the accumulation on the inner side of the sealing surface. At the same time, the wider glue surface can prevent the sealing failure caused by the manufacturing deviation of parts resulting in the planar - sealing silicone rubber not falling onto the pressure - bearing surface.

[0030] The height from the bottom of the limit chuck 321 to the lower part of the glue outlet 233, the cutting size of the glue outlet 233, and the width of the limit chuck 321 can be adaptively designed according to different glue - applying amounts and the width of the part sealing surface to meet different part sealing requirements.

[0031] Other technologies of this embodiment adopt the existing technologies.

[0032] The present invention is described by way of preferred embodiments. Those skilled in the art know that without departing from the spirit and scope of the present invention, various changes or equivalent substitutions can be made to these features and embodiments. The present invention is not limited by the specific embodiments disclosed herein, and other embodiments falling within the scope of the claims of this application belong to the scope of protection of the present invention.

Claims

1. A flexible glue - applying head, characterized in that: It includes a glue outlet tube (2), an elastic pressing piece (3) and a flexible glue outlet head (231). The flexible glue outlet head (231) is connected to the output end of the glue outlet tube (2). A limit card slot (232) is provided at the output end of the flexible glue outlet head (231). A glue outlet (233) is provided at the bottom of the limit card slot (232). One end of the elastic pressing piece (3) abuts against the glue outlet tube (2), and the other end of the elastic pressing piece (3) is clamped in the limit card slot (232). The elastic pressing piece (3) and the glue outlet tube (2) are also connected by an elastic member (4). A limit card head (321) is connected to the other end of the elastic pressing piece (3), and the limit card head (321) abuts against one side of the limit card slot (232).

2. The flexible glue applying head according to claim 1, wherein: The elastic pressing piece (3) includes a support plate (31) and a pressing piece body (32). The pressing piece body (32) is a trapezoidal sheet body. The support plate (31) is fixedly connected to the wide end of the pressing piece body (32), and the limit card head (321) is fixedly connected to the narrow end of the pressing piece body (32).

3. The flexible glue applying head according to claim 2, wherein: The glue outlet tube (2) includes a tube seat (21) and a flexible tube (23). The tube seat (21) is connected to the flexible tube (23), and the flexible glue outlet head (231) is connected to the output end of the flexible tube (23).

4. The flexible glue applying head according to claim 3, wherein: An arc-shaped connection port is provided on the support plate (31). A pressing piece card slot (211) is formed on the outer wall of the tube seat (21). The support plate (31) is clamped on the pressing piece card slot (211) through the arc-shaped connection port.

5. The flexible glue applying head according to any one of claims 3 or 4, wherein: A first hook ring (22) is provided at the bottom of the pressing piece body (32). A second hook ring (33) is provided on the outer wall of the tube seat (21). The elastic member (4) is a spring, and the two ends of the spring are respectively connected to the first hook ring (22) and the second hook ring (33).

6. The flexible glue applying head according to claim 3, wherein: The flexible tube (23) is tapered. The flexible tube (23) is formed by plastic injection molding of a flexible tube, and the flexible tube (23) is integrally fixed to the glue seat by hot melting.

7. The flexible glue applying head according to claim 1, wherein: The glue outlet (233) is a rectangular opening, and the width of the limit card head (321) is greater than the width of the limit card slot (232).

8. The flexible glue applying head according to claim 7, wherein: The height of the cut of the glue outlet (233) is 1 / 3 of the diameter of the flexible glue outlet head (231).

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