CN113858523A

CN113858523A - Foaming plug

Info

Publication number: CN113858523A
Application number: CN202010619745.1A
Authority: CN
Inventors: 盛保敬; 常永超; 王广岭; 刘志强; 徐冯; 霍达; 王中春
Original assignee: Haier Smart Home Co Ltd; Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Current assignee: Haier Smart Home Co Ltd; Qingdao Economic and Technological Development Zone Haier Water Heater Co Ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-12-31

Abstract

The invention belongs to the technical field of foaming, and discloses a foaming plug which comprises a base and a middle plate arranged on the base, wherein a cavity is formed between the middle plate and the base, a connecting rod mechanism is arranged in the cavity, the connecting rod mechanism is rotated, and the end part of the connecting rod mechanism can extend out of the cavity. According to the foaming plug, the foaming cotton is pressed on the outer wall of the inner container of the electric appliance to be foamed through the base, the end part of the connecting rod mechanism extends out of the cavity and is clamped in the shell of the electric appliance to be foamed through rotating the connecting rod mechanism, self-locking is realized, the foaming plug is placed in a mode of manual assistance or tape pasting, close fitting of the foaming plug and the shell before foaming can be guaranteed, and good foaming of the electric appliance to be foamed is further guaranteed.

Description

Foaming plug

Technical Field

The invention relates to the technical field of foaming, in particular to a foaming plug.

Background

For household appliances with inner containers (such as water storage type water heaters), polyurethane foaming materials are filled between the inner containers and the shells for heat preservation, and the thickness of the heat preservation layer and the product structure can influence the requirements of the foaming process. The thickness of the heat preservation layer of most of water heaters is about 50mm, the size of the opening of the electrical chamber at the reserved shell is small, an EPS foam cushion layer or decorative cotton is pre-coated on the inner side of the opening of the shell to separate a foaming material to form an electrical chamber cavity during foaming, and then the electrical chamber cavity is filled at the opening of the shell through a foaming plug to be foamed. However, the existing foaming method has the following problems:

the foaming plug used in the prior art has no self-locking structure, normally, pretightening force is applied through manual assistance or a mode of adhering an adhesive tape, the installation of the foaming plug is extremely inconvenient, the mode of applying manual assistance or adhesive tape adhesion cannot be tightly attached to the foaming plug and a shell, the shell is easy to deform and the flash phenomenon is easy to generate when the pretightening force is applied for foaming, and the production efficiency is influenced. In addition, the existing foaming plug and the foaming material are isolated by the release agent, the release agent needs to be coated when the foaming plug is used every time, the production efficiency is seriously influenced, the cost of the release agent is increased, the release agent is not coated in place, the foaming plug is easy to detach and is difficult, and the foaming material is easy to overflow from the foaming plug and the shell.

Disclosure of Invention

The invention aims to provide a foaming plug which can realize self-locking, further save manual assistance or a tape-bonding mode for placing the foaming plug, ensure the close fit between the foaming plug and a shell before foaming and further ensure good foaming of an electric appliance to be foamed.

In order to achieve the purpose, the invention adopts the following technical scheme:

a foaming plug comprises a base and a middle plate arranged on the base, wherein a cavity is formed between the middle plate and the base, a connecting rod mechanism is arranged in the cavity, the connecting rod mechanism is rotated, and the end part of the connecting rod mechanism can extend out of the cavity.

Preferably, the link mechanism comprises a rotary table, two first connecting rods with one ends hinged to one side of the rotary table, and a second connecting rod hinged to the other end of the first connecting rod, and the second connecting rod can extend out of the chamber.

Preferably, the hinge point of the two first connecting rods is symmetrical with respect to the center of the axis of the rotating disc.

Preferably, the link mechanism further comprises two third connecting rods, one ends of the two third connecting rods are hinged to the other side of the rotary table, and the other ends of the three third connecting rods are hinged to the second connecting rod.

Preferably, the hinge point of the two third connecting rods is symmetrical with respect to the center of the axis of the rotating disc.

Preferably, a slideway communicated with the outside is formed between the base and the middle plate, and the second connecting rod is arranged in the slideway in a sliding manner.

Preferably, the base is provided with a protrusion, the middle plate is provided with a groove, and the protrusion and the groove form the slideway.

Preferably, the foaming plug further comprises a knob, and the knob is fixedly connected to the link mechanism and used for driving the link mechanism to rotate.

Preferably, the foaming plug further comprises an upper seat, the upper seat is fixedly connected to the middle plate, and the upper seat is provided with a circular groove for accommodating the knob.

Preferably, the foaming plug is wrapped by a film layer, and the film layer is made of HDPE plastic.

The invention has the beneficial effects that: through base pressfitting foaming cotton in the inner bag outer wall of electrical apparatus that waits to foam to through rotatory link mechanism, make link mechanism's tip stretch out the cavity, and the joint realizes the auto-lock in the casing of electrical apparatus that waits to foam, and then save artificial assistance or tape-stripping's mode and place the foaming stopper, can guarantee the inseparable laminating of foaming stopper and casing before the foaming, and then guarantee that electrical apparatus that waits to foam foams well.

The foaming stopper of this embodiment can laminate the outer wall of the casing of treating foaming electrical apparatus, leaks the material when can effectively preventing to foam. And through the rete of foaming stopper outsourcing parcel material HDPE plastics, can make foaming stopper and foaming material and casing isolated, the foaming stopper is easily taken out and the electric room cavity shaping is good after the foaming.

Drawings

FIG. 1 is a schematic view of an exploded structure of a foaming stopper provided by the present invention;

FIG. 2 is a schematic view of the assembly of the linkage mechanism provided by the present invention on a base;

FIG. 3 is a schematic structural view of the foaming plug of the present invention in a self-locking state;

FIG. 4 is a front view of the foaming stopper provided by the present invention in an unlocked state;

fig. 5 is an assembled sectional view of the foaming plug and the electric appliance to be foamed provided by the present invention.

In the figure:

1. a base; 11. a through hole; 12. deep grooves; 13. a first protrusion; 14. a second protrusion; 15. a third protrusion; 16. a first positioning groove; 2. a middle plate; 21. a central bore; 22. positioning the projection; 3. a link mechanism; 31. a turntable; 32. a first link; 33. a second link; 34. a third link; 4. a knob; 5. an upper seat; 51. a circular groove; 52. locking the identification; 53. an unlocking identifier; 6. a bolt; 10. a liner middle barrel; 20. a housing; 30. PU foam; 40. a temperature controller; 50. a heating element.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The invention provides a foaming plug which is used for foaming of an electric appliance with an inner container, taking the electric appliance as a water heater as an example, the foaming plug can be arranged on a shell 20 of the water heater and can realize foaming between the shell 20 of the water heater and the inner container, and compared with the existing manual assistance or adhesive tape pasting mode for placing the foaming plug, the foaming plug can be self-locked in the shell 20, so that foaming materials are prevented from overflowing through a gap between the shell 20 and the foaming plug, and the situation that a shell is deformed when the foaming plug is manually exerted with pretightening force for foaming can also be prevented.

As shown in fig. 1 to 5, the foaming plug of the present embodiment includes a base 1, a middle plate 2, a link mechanism 3, an upper seat 5 and a knob 4, wherein:

the base 1 may be a rectangular block structure, which is provided with a through hole 11, and the bolt 6 penetrates through the through hole 11 and the middle plate 2 to be connected to the upper seat 5 by screw threads, so as to fix the base 1, the middle plate 2 and the upper seat 5. A deep groove 12 (shown in fig. 5) is formed on a side of the base 1 away from the middle plate 2, and the size of the deep groove 12 is ensured to cover electrical elements such as a temperature controller 40, a heating element 50, and the like of an electrical appliance to be foamed, so as to prevent the foamed material from affecting the use of the electrical elements. It will be understood that the depth of the deep groove 12 is also determined by the length of the electrical component protruding from the inner container of the appliance to be foamed.

The other side of the base 1 is provided with a protrusion, which may specifically include a first protrusion 13, a second protrusion 14 and a third protrusion 15, wherein the first protrusion 13 and the second protrusion 14 are disposed along the same straight line at intervals, and the third protrusion 15 is in a long strip shape.

Illustratively, the side of the base 1 provided with the first protrusion 13 of the present embodiment may further be provided with a first positioning groove 16, and the first positioning groove 16 is used for positioning and installing the middle plate 2. Preferably, the shape of the first positioning groove 16 may be a polygon.

In this embodiment, as shown in fig. 1, the shape of the middle plate 2 may be matched with that of the base 1, or may be a rectangular block structure, and a first positioning portion (not shown in the figure) is disposed on a side of the middle plate 2 opposite to the base 1, and the first positioning portion can be buckled with the first positioning groove 16, so as to fix the middle plate 2 and the base 1, and ensure that the middle plate 2 is attached to the base 1.

Furthermore, a cavity is arranged on one side of the middle plate 2 opposite to the base 1, the cavity and the base 1 cooperate to form a closed cavity, and a groove is arranged at the cavity of the middle plate 2, and the groove and the protrusion on the base 1 can form a slide way. Alternatively, the grooves may include a first groove and a second groove, wherein the first groove cooperates with the first protrusion 13 and the second protrusion 14 to form a slide, and the second groove cooperates with the third protrusion 15 to form a slide. It should be noted that one end of the first and second grooves is disposed through the middle plate 2.

A center hole 21 is formed in the center of the middle plate 2, and a rotation shaft of the link mechanism 3 can be inserted through the center hole 21.

A positioning protrusion 22 is disposed on one side of the middle plate 2 facing away from the base 1, two positioning protrusions 22 may be disposed, and the two positioning protrusions 22 may be centrosymmetric with respect to the axis of the central hole 21. The positioning protrusion 22 can limit and fix the middle plate 2 and the upper seat 5.

In this embodiment, as shown in fig. 1, the link mechanism 3 includes a rotary plate 31, a first link 32 and a second link 33, the rotary plate 31 is disposed in the chamber, and a rotary shaft is fixedly extended from one side thereof, and the rotary shaft passes through the central hole 21 of the middle plate 2 for the operator to rotate.

The two first connecting rods 32 are arranged, one ends of the two first connecting rods 32 are hinged to the rotary table 31, the other ends of the two first connecting rods 32 are hinged to the second connecting rod 33, and the second connecting rod 33 can be arranged in the slide way in a sliding mode and can extend out of the slide way. That is to say, when the carousel 31 rotated, can drive first connecting rod 32 motion, first connecting rod 32 then drives second connecting rod 33 and slides in the slide, because the slide can play the guide effect to second connecting rod 33, and then makes second connecting rod 33 can only move along the slide, finally can stretch out the slide to play the effect with whole foaming stopper auto-lock.

Preferably, the hinge points of the two first links 32 and the rotating disc 31 are symmetrical with respect to the center of the axis of the rotating disc 31, and the hinge points of the two first links 32 and the second link 33 are also symmetrical with respect to the center of the axis of the rotating disc 31. By this arrangement, the two second links 33 can be arranged diagonally, and when the rotary plate 31 rotates, the two first links 32 can generate the same pulling or pushing force to pull or extend the second links 33 by the same distance. And the second connecting rod 33 arranged diagonally can better lock the foaming plug.

In this embodiment, the link mechanism 3 may further include two third connecting rods 34, one end of each of the two third connecting rods 34 is hinged to the rotating plate 31, and the other end of each of the two third connecting rods 34 is hinged to a second connecting rod 33 which can be slidably disposed in the slideway, that is, when the rotating plate 31 rotates, the third connecting rod 34 can be driven to move, the third connecting rod 34 drives the second connecting rod 33 to slide in the slideway, and the slideway can guide the second connecting rod 33, so that the second connecting rod 33 can only move along the slideway, and finally can extend out of the slideway, and can self-lock the whole foaming plug.

Preferably, the hinge points of the two third links 34 and the rotary disc 31 are symmetrical with respect to the center of the axis of the rotary disc 31, and the hinge points of the two third links 34 and the second link 33 are also symmetrical with respect to the center of the axis of the rotary disc 31. By this arrangement, the two second links 33 can be arranged diagonally, and when the rotary plate 31 rotates, the two third links 34 can generate the same pulling or pushing force to pull or extend the second links 33 by the same distance.

Preferably, the present embodiment may provide a first link 32, a second link 33 and a third link 34 at the same time, wherein the first link 32 is hinged with the upper side of the rotating disc 31, and the third link 34 is hinged with the lower side of the rotating disc 31 (shown in fig. 2). Through setting up above-mentioned first connecting rod 32, second connecting rod 33 and third connecting rod 34 simultaneously, can realize that four second connecting rods 33 stretch out the slide, and then lock four angles of whole foaming stopper, its auto-lock effect is better.

It is understood that, in the present embodiment, only the first connecting rod 32 and the second connecting rod 33 may be provided, and the self-locking of the foaming plug is realized by the two second connecting rods 33. Or only the third connecting rod 34 and the second connecting rod 33 are arranged, so that the self-locking of the foaming plug can be realized.

In this embodiment, it should be noted that, because the first link 32 is hinged to the upper side of the rotating disc 31, an opening is required to be opened on one side of the sliding track, and at this time, an opening may be provided on one side of the second groove of the middle plate 2 for the first link 32 to pass through and move. Also, since the second link 33 is hinged to the lower side of the rotation plate 31, the second link 33 can pass through the interval between the first projection 13 and the second projection 14 of the base 1 so that the second link 33 moves.

As shown in fig. 1, the upper seat 5 is attached to a side of the middle plate 2 away from the base 1, and a positioning groove (not shown) is formed on the upper seat 5, and the positioning groove is matched with the positioning protrusion 22 on the middle plate 2, so that the upper seat 5 is closely attached to the middle plate 2. A circular groove 51 is formed in the center of the upper seat 5, a hole is formed in the middle of the circular groove 51, the rotating shaft of the rotating disc 31 can pass through the hole and be arranged in the circular groove 51, the rotating shaft of the rotating disc 31 can be fixedly connected to a knob 4, and the knob 4 is arranged in the circular groove 51. By rotating the knob 4, the knob 4 can drive the rotary disc 31 to rotate, so that the rotary disc 31 drives the first connecting rod 32 and/or the third connecting rod 34 to move, and finally drives the second connecting rod 33 to extend out of the slideway or retract into the slideway.

In this embodiment, it is preferable that a locking mark 52 and an unlocking mark 53 are provided at the end face of the upper seat 5, and an indication structure is provided on the knob 4, and when the knob 4 is rotated to extend the third link 34 out of the slide way, the indication structure of the knob 4 is directed to the locking mark 52 (shown in fig. 3); when the knob 4 is rotated so that the third link 34 retracts into the slide, the indicating structure of the knob 4 points to the unlocking indicator 53 (shown in fig. 4).

In this embodiment, the whole foaming plug is further wrapped with a film (not shown), specifically, the film wraps the base 1, the middle plate 2 and the upper seat 5, and when the third connecting rod 34 of the connecting rod mechanism 3 extends, the film can also wrap the portion of the third connecting rod 34 extending out of the slideway. Preferably, the material of the film layer is HDPE plastic (High Density Polyethylene, english name "High Density Polyethylene", abbreviated as "HDPE"). The HDPE plastic is a thermoplastic resin with high crystallinity and non-polarity, which is not adhered to the foaming material, so that the foaming material can be isolated from the foaming plug of the embodiment when foaming, and the foaming plug can be conveniently taken down after foaming is finished. Compared with the existing mode of smearing the release agent to isolate the foaming plug from the foaming material, the implementation of the film layer made of the HDPE plastic material can be repeatedly utilized, the cost is saved, the time of smearing the release agent every time can be saved, the production efficiency is improved, and in addition, the film layer can also prevent the difficulty in demoulding caused by uneven smearing.

When the foaming plug of the present embodiment is used, as shown in fig. 5, taking an electrical appliance as an example of a water heater, the water heater includes a liner middle barrel 10 and a shell 20, and an opening is opened on the shell 20, and the opening is used for installing the foaming plug. When the foaming stopper is installed, firstly, the PU foam 30 is pressed in the inner container middle barrel 10 through the base 1, the connecting rod mechanism 3 is positioned on the inner side of the shell 20 at the moment, the size of the upper seat 5 is larger than the opening size, so that the upper seat can be pressed on the outer side of the shell 20, meanwhile, due to the arrangement of the film layer, the thickness of the film layer is preferably the best for filling the gap between the foaming stopper and the shell 20, and then the foaming material can be prevented from overflowing through the gap in the foaming process.

When the foaming plug is installed at the housing 20, the groove of the base 1 covers electrical elements such as a temperature controller 40, a heating element 50, etc. of an electrical appliance to be foamed. Then the knob 4 is screwed to the position where the indicating structure of the knob points to the self-locking mark, the knob 4 rotates to drive the third connecting rod 34 to extend out of the slide way and abut against the inner side of the shell 20 (the length of the third connecting rod 34 extending out of the slide way can be set according to different foaming requirements) so as to lock the foaming plug on the shell 20, prevent the foaming plug from falling from a preassembling station to a foaming station, reduce manual assistance in the process, effectively protect the shell 20 in the process of pressing and foaming, and prevent the shell 20 from being deformed due to the fact that a common foaming plug is not installed in place; after foaming, the third connecting rod 34 retracts into the slideway by rotating the knob 4, at the moment, the foaming plug is in an unlocking state, and an operator can conveniently take out the foaming plug and continue to use the next foaming process.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The foaming plug is characterized by comprising a base (1) and a middle plate (2) arranged on the base (1), a cavity is formed between the middle plate (2) and the base (1), a connecting rod mechanism (3) is arranged in the cavity, the connecting rod mechanism (3) is rotated, and the end part of the connecting rod mechanism (3) can extend out of the cavity.

2. Foaming stopper according to claim 1 wherein the linkage (3) comprises a rotary disc (31), two first links (32) hinged at one end to one side of the rotary disc (31), and a second link (33) hinged at the other end of the first links (32), the second link (33) being extendable out of the chamber.

3. Foaming stopper according to claim 2 wherein the hinge point of the two first links (32) is symmetrical with respect to the centre of the axis of the rotating disc (31).

4. Foaming stopper according to claim 2 or 3 wherein the linkage (3) further comprises two third links (34) hinged at one end to the other side of the rotating disc (31), the other end of the third links (34) being hinged to a second link (33).

5. Foaming stopper according to claim 4 wherein the hinge point of the two third links (34) is symmetrical with respect to the centre of the axis of the rotating disc (31).

6. The foaming stopper according to claim 5, wherein a slideway communicated with the outside is formed between the base (1) and the middle plate (2), and the second connecting rod (33) is slidably arranged in the slideway.

7. The foaming stopper according to claim 6, wherein the base (1) is provided with a protrusion, the middle plate (2) is provided with a groove, and the protrusion and the groove form the slideway.

8. The foaming stopper according to claim 1, further comprising a knob (4), wherein the knob (4) is fixedly connected to the linkage mechanism (3) for driving the linkage mechanism (3) to rotate.

9. The foaming stopper according to claim 8, further comprising an upper seat (5), wherein the upper seat (5) is fixedly connected to the middle plate (2), and the upper seat (5) is provided with a circular groove for accommodating the knob (4).

10. The foaming stopper of claim 1, wherein the foaming stopper is wrapped with a film layer, and the film layer is made of HDPE plastic.