Nut hot melting press fitting device

Abstract

The utility model relates to the technical field of household appliances, in particular to a nut hot-melting press-fitting device which comprises a base plate, and a workpiece placing station is arranged above the base plate and used for installing and placing a shell body of a shell to be machined. A horizontal supporting plate is installed above the base plate through a supporting structure, a horizontally-arranged installing plate is arranged at the position, below the supporting plate and located above a shell body on a workpiece placing station, of the shell body, and press-fitting rods are arranged below the installing plate and correspond to nuts in installing holes in the shell body respectively. Heating structures are respectively arranged on the press-fitting rods and are used for heating the press-fitting rods; the press-fitting rod comprises a press-fitting positioning section at the lower end and a connecting rod section at the upper end, and the diameter of the press-fitting positioning section is matched with the inner diameter of the nut; and a vertical movement control mechanism is arranged between the mounting plate and the supporting plate. The nut has the advantages of being simpler and more reasonable in structural design, capable of better protecting the shell from being damaged so as to improve the product percent of pass, and capable of enabling the nut and the shell to be matched more tightly and reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a nut hot-melt press-fitting device. Background Art

[0002] like Figure 1 、 Figure 2 and Figure 3 As shown, an electrical device housing shell comprises a shell 1 of an overall rectangular box structure and an open top. An extended convex plate 2 is horizontally extended inwardly at each of the four corner positions on the inner circumference of the shell. The outer sides of the extended convex plates are vertically bent upward to form a bent flange 3. The upper ends of the bent flanges extend above the upper end surface of the shell. The two ends of the bent flanges are connected to the inner circumference of the shell. The inner edge of the open end surface of the shell protrudes upward to form a docking convex edge 4, and the two ends of the bent flange are connected to the docking convex edge. An installation cavity is formed between the extended convex plate, the bent flange and the corner position of the shell. An upwardly protruding installation column 5 is provided on the bottom surface of the installation cavity. A mounting hole 6 is provided on the upper end surface of the installation column for assembling a nut. A reinforcing rib plate 7 is provided on the outer periphery of the installation column. During the manufacturing process of the above-mentioned electrical device housing shell, the electrical device housing shell is obtained by injection molding, and then the nut is assembled into the mounting hole of the installation column.

[0003] The existing operation is to directly press the nut into the mounting hole of the mounting post using a press-fitting device. This operation method has the following disadvantages: 1. The housing is a plastic part with relatively low structural strength, which can easily cause the mounting post on the housing to break, resulting in a lower product qualification rate; 2. After the nut is assembled into the mounting hole of the mounting post, the two are not tightly matched and the nut is easy to fall out. Utility Model Content

[0004] In view of the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is how to provide a nut hot-melt pressing device with a simpler and more reasonable structural design, which can better protect the shell from damage to improve the product qualification rate and make the nut and the shell fit more tightly and reliably.

[0005] To achieve the above-mentioned purpose, the utility model provides a nut hot-melt pressing device, comprising a base plate, a workpiece placement station above the base plate and used for installing and placing the shell shell to be processed; a horizontal support plate is arranged above the base plate and installed by a supporting structure, a horizontally arranged mounting plate is provided below the support plate and above the shell shell located on the workpiece placement station, a pressing rod is provided below the mounting plate and corresponds to the nut in the mounting hole on the shell shell, and the pressing rod is respectively provided with a heating structure and used to heat the pressing rod; the pressing rod includes a pressing positioning section at the lower end and a connecting rod section at the upper end, and the diameter of the pressing positioning section matches the inner diameter of the nut; a vertical movement control mechanism is provided between the mounting plate and the support plate, the vertical movement control mechanism can drive the pressing rod below the mounting plate to move toward the nut in the mounting hole of the shell shell, and after the pressing positioning section is correspondingly inserted and fitted in the nut, the pressing step surface formed between the pressing positioning section and the connecting rod section abuts and supports on the upper end surface of the nut to press the nut into the mounting hole of the mounting column.

[0006] In this way, when the above-mentioned nut hot-melt press-fitting device is used, the shell body with the nut placed in the shell body mounting hole is placed on the workpiece placement station accordingly, and the device starts to operate. The heating structure can heat the press-fitting rod so that it maintains the normal temperature. At the same time, the vertical movement control mechanism can drive the press-fitting rod below the mounting plate to move toward the nut in the shell body mounting hole. After the press-fitting positioning section is inserted and matched with the nut, heat can be transferred to the nut, causing the thread temperature to increase. At the same time, the press-fitting step surface formed between the press-fitting positioning section and the connecting rod section abuts and supports on the upper end face of the nut to press the nut into the mounting hole of the mounting column, completing the hot-melt press-fitting. In the above-mentioned device, the nut can be heated and press-fitted at the same time. When the nut after the temperature is increased is press-fitted into the shell body made of plastic material, the shell body can be better prevented from cracking during the press-fitting process, and the shell can be better protected from damage to improve the product qualification rate. In addition, the press-fitting positioning section provided can better ensure that the nut remains in a vertical state and can also better transfer heat to cause the nut to heat up.

[0007] As an optimization, a connecting head is provided at the upper end of the connecting rod segment, and mounting fixing holes are provided on the mounting plate corresponding to the connecting heads, and the connecting heads are installed in the mounting fixing holes.

[0008] In this way, by arranging a connector at the upper end of the connecting rod, the press-fitting rod can be installed and fixed more conveniently.

[0009] As an optimization, a chamfered angle structure is provided at the lower end of the press-fit positioning section.

[0010] In this way, the structural design of the press-fitting positioning section is simpler and more reasonable, and the press-fitting positioning section can be better inserted into the nut during press-fitting.

[0011] As an optimization, a placement hole designed as a blind hole structure is provided on the upper end surface of the press rod; the heating structure includes a heating resistor rod arranged in the placement hole, and the upper end of the heating resistor rod is connected to two pairs of power supply wires.

[0012] In this way, the press-fitting rod is heated by the heating resistor rod, the structural design is simpler and more reasonable, and the press-fitting rod can be heated better.

[0013] As an optimization, mounting blocks are provided at the four corner positions on the upper surface of the mounting plate and each corresponds to a press-fitting rod. A through hole is vertically penetrated on the mounting block, and the upper end of the heating resistor rod extends into the through hole; and the two paired power supply wires are passed upward to the outside of the through hole, and two connecting wires are provided in pairs, and the two connecting wires are respectively electrically connected to the four groups of power supply wires.

[0014] In this way, by designing the mounting block, on the one hand, the press-fitting rod can be vertically positioned to prevent it from moving vertically relative to the mounting plate; on the other hand, it can be more convenient to arrange the connecting wires and power supply wires.

[0015] Furthermore, screw holes are respectively provided at the four corner positions of the mounting block and are respectively matched with connecting screws, and the connecting screws are connected and fixed to the mounting plate.

[0016] As an optimization, a positioning block is provided on the upper surface of the seat plate and at two corner positions corresponding to the rear side of the outer shell shell, and the positioning block is designed as an L-shaped structure as a whole; and the positioning block has a first positioning surface and a second positioning surface arranged vertically, the first positioning surface and the second positioning surface are arranged at right angles to each other, and the first positioning surface and the second positioning surface are connected by an arc surface; and the first positioning surface and the second positioning surface can be attached to the corner position of the rear side of the outer shell shell to limit the position of the outer shell shell.

[0017] In this way, by providing the positioning block, the outer shell can be better positioned, making operation and use more convenient.

[0018] Furthermore, the positioning block is detachably connected to the seat plate by connecting screws.

[0019] As an optimization, the support structure includes vertically arranged mounting support plates installed on both sides of the seat plate, and the support plate is installed above the mounting support plates; a U-shaped structurally designed concession opening is provided at the front end of each mounting support plate.

[0020] In this way, the supporting structure adopts two mounting support plates, the structural design is simpler and more reasonable, and the mounting support is more stable and reliable.

[0021] Furthermore, the mounting support plate and the seat plate, as well as the mounting support plate and the support plate, are connected and fixed together by connecting screws.

[0022] As an optimization, the vertical movement control mechanism includes a driving cylinder installed in the middle position of the upper surface of the support plate and arranged vertically downward. The piston rod end of the driving cylinder is connected to a driving rod through a connecting sleeve, and the driving rod passes through a through hole provided in the center position of the support plate to the bottom of the support plate, and a threaded rod section is provided at the lower end of the driving rod and is threadedly connected to a threaded fixing hole provided in the middle of the mounting plate.

[0023] In this way, the driving cylinder is used for driving, the structural design is simpler and more reasonable, and the pressing force provided is more stable and reliable.

[0024] As an optimization, two guide rods arranged vertically upward are connected to the mounting plate, and the upper ends of the guide rods are correspondingly matched in the guide holes of the support plate.

[0025] In this way, by providing the guide rod, the vertical movement of the mounting plate and the pressing rod below can be better guaranteed, thereby improving the reliability of the nut pressing.

[0026] To sum up, in the above-mentioned device structure, when the nut is pressed into the mounting hole of the outer shell, the pressing rod is heated at the same time. The pressing rod is in contact with the nut, and the heat can be transferred to the nut to heat the nut. At the same time of pressing, the corresponding position of the outer shell can be hot-melted, thereby better protecting the shell from damage to improve the product qualification rate, and also making the nut and the shell fit more tightly and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of the housing of an electrical device.

[0028] Figure 2 yes Figure 1 A locally enlarged schematic diagram of position A in FIG.

[0029] Figure 3 yes Figure 1 Schematic diagram of the structure after rotation by an angle.

[0030] Figure 4 It is a structural schematic diagram of a nut hot-melt press-fitting device in a specific embodiment of the present utility model.

[0031] Figure 5 yes Figure 4 Schematic diagram of the structure after rotation by an angle.

[0032] Figure 6 yes Figure 4 Front view of.

[0033] Figure 7 yes Figure 4 rear view.

[0034] Figure 8yes Figure 4 Top view of .

[0035] Figure 9 yes Figure 4 Schematic diagram of the structure of the press-fit rod. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, in the description of the present invention, the terms "upper," "lower," "left," "right," "inner," "outer," and the like, indicating directions or positions, are based on the directions or positions shown in the accompanying drawings and are intended solely for the purpose of facilitating and simplifying the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific manner. Therefore, they should not be construed as limiting the present invention. The terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] like Figures 1 to 9 As shown, a nut hot-melt pressing device comprises a base plate 8, above which is provided a workpiece placement station for installing and placing a shell shell 9 to be processed; above the base plate and installed by a support structure, a horizontal support plate 10 is provided, below the support plate and above the shell shell located on the workpiece placement station, a horizontally arranged mounting plate 11 is provided, below the mounting plate and corresponding to the nut in the mounting hole on the shell shell, a pressing rod 12 is provided, and each pressing rod is provided with a heating structure for heating the pressing rod; the pressing rod comprises a pressing positioning section 13 at the lower end and a connecting rod section 14 at the upper end, and the diameter of the pressing positioning section matches the inner diameter of the nut; a vertical movement control mechanism is provided between the mounting plate and the support plate, and the vertical movement control mechanism can drive the pressing rod below the mounting plate to move toward the nut in the mounting hole of the shell shell, and after the pressing positioning section is correspondingly inserted and fitted in the nut, the pressing step surface 15 formed between the pressing positioning section and the connecting rod section abuts and supports on the upper end face of the nut to press the nut into the mounting hole of the mounting column.

[0038] In this way, when the above-mentioned nut hot-melt press-fitting device is used, the shell body with the nut placed in the shell body mounting hole is placed on the workpiece placement station accordingly, and the device starts to operate. The heating structure can heat the press-fitting rod so that it maintains the normal temperature. At the same time, the vertical movement control mechanism can drive the press-fitting rod below the mounting plate to move toward the nut in the shell body mounting hole. After the press-fitting positioning section is inserted and matched with the nut, heat can be transferred to the nut, causing the thread temperature to increase. At the same time, the press-fitting step surface formed between the press-fitting positioning section and the connecting rod section abuts and supports on the upper end face of the nut to press the nut into the mounting hole of the mounting column, completing the hot-melt press-fitting. In the above-mentioned device, the nut can be heated and press-fitted at the same time. When the nut after the temperature is increased is press-fitted into the shell body made of plastic material, the shell body can be better prevented from cracking during the press-fitting process, and the shell can be better protected from damage to improve the product qualification rate. In addition, the press-fitting positioning section provided can better ensure that the nut remains in a vertical state and can also better transfer heat to cause the nut to heat up.

[0039] In this specific embodiment, a connecting head 16 is provided at the upper end of the connecting rod segment, and mounting holes are provided on the mounting plate corresponding to the connecting heads, and the connecting heads are installed in the mounting holes.

[0040] In this way, by arranging a connector at the upper end of the connecting rod, the press-fitting rod can be installed and fixed more conveniently.

[0041] In this specific embodiment, a chamfered angle structure is provided at the lower end of the press-fitting positioning section.

[0042] In this way, the structural design of the press-fitting positioning section is simpler and more reasonable, and the press-fitting positioning section can be better inserted into the nut during press-fitting.

[0043] In this specific embodiment, a placement hole designed as a blind hole structure is provided on the upper end surface of the press rod; the heating structure includes a heating resistor rod 17 arranged in the placement hole, and the upper end of the heating resistor rod is connected to two pairs of power supply wires 18.

[0044] In this way, the press-fitting rod is heated by the heating resistor rod, the structural design is simpler and more reasonable, and the press-fitting rod can be heated better.

[0045] In this specific embodiment, mounting blocks 19 are provided at four corner positions on the upper surface of the mounting plate and respectively correspond to the press-fitting rods. A through hole is vertically penetrated on the mounting block, and the upper end of the heating resistor rod extends into the through hole; and the two paired power supply wires are passed upward to the outside of the through hole, and two connecting wires 20 are also provided in pairs, and the two connecting wires are respectively electrically connected to the four groups of power supply wires.

[0046] In this way, by designing the mounting block, on the one hand, the press-fitting rod can be vertically positioned to prevent it from moving vertically relative to the mounting plate; on the other hand, it can be more convenient to arrange the connecting wires and power supply wires.

[0047] Specifically, the four corner positions of the mounting block are respectively provided with screw holes and are respectively matched with connecting screws, and the connecting screws are connected and fixed to the mounting plate.

[0048] In this specific embodiment, a positioning block 21 is provided on the upper surface of the seat plate and at two corner positions corresponding to the rear side of the outer shell, and the positioning block is designed as an L-shaped structure as a whole; and the positioning block has a first positioning surface and a second positioning surface arranged vertically, and the first positioning surface and the second positioning surface are arranged at right angles to each other, and the first positioning surface and the second positioning surface are connected by an arc surface; and the first positioning surface and the second positioning surface can be attached to the corner position of the rear side of the outer shell to limit the position of the outer shell.

[0049] In this way, by providing the positioning block, the outer shell can be better positioned, making operation and use more convenient.

[0050] Specifically, the positioning block is detachably connected to the seat plate by connecting screws.

[0051] In this specific embodiment, the support structure includes vertically arranged mounting support plates 22 installed on both sides of the seat plate, and the support plate is installed above the mounting support plates; a U-shaped structure-designed clearance opening 23 is provided at the front end of each mounting support plate.

[0052] In this way, the supporting structure adopts two mounting support plates, the structural design is simpler and more reasonable, and the mounting support is more stable and reliable.

[0053] Specifically, the mounting support plate and the seat plate, as well as the mounting support plate and the support plate, are connected and fixed together by connecting screws.

[0054] In this specific embodiment, the vertical movement control mechanism includes a driving cylinder 24 installed in the middle position of the upper surface of the support plate and arranged vertically downward. The piston rod end of the driving cylinder is connected to a driving rod 25 through a connecting sleeve, and the driving rod passes through a through hole provided in the center position of the support plate to the bottom of the support plate, and the lower end of the driving rod is provided with a threaded rod section and is threadedly connected to a threaded fixing hole provided in the middle of the mounting plate.

[0055] In this way, the driving cylinder is used for driving, the structural design is simpler and more reasonable, and the pressing force provided is more stable and reliable.

[0056] In this specific embodiment, two vertically upwardly disposed guide rods 26 are connected to the mounting plate, and the upper ends of the guide rods are correspondingly disposed in the guide holes of the support plate.

[0057] In this way, by providing the guide rod, the vertical movement of the mounting plate and the pressing rod below can be better guaranteed, thereby improving the reliability of the nut pressing.

[0058] To sum up, in the above-mentioned device structure, when the nut is pressed into the mounting hole of the outer shell, the pressing rod is heated at the same time. The pressing rod is in contact with the nut, and the heat can be transferred to the nut to heat the nut. At the same time of pressing, the corresponding position of the outer shell can be hot-melted, thereby better protecting the shell from damage to improve the product qualification rate, and also making the nut and the shell fit more tightly and reliably.

[0059] The above describes in detail the preferred embodiments of the present invention. It should be understood that those skilled in the art can make numerous modifications and variations based on the concepts of the present invention without inventive effort. Therefore, any technical solutions that can be derived by those skilled in the art based on the concepts of the present invention through logical analysis, reasoning, or limited experimentation based on the existing technology should be within the scope of protection defined by the claims.

Claims

1. A nut hot melt press-fitting device, comprising a base plate, a workpiece placement station above the base plate for mounting a shell to be processed; A horizontal support plate is provided above the base plate and is installed through a support structure; a horizontal mounting plate is provided below the support plate and above the outer shell body located on the workpiece placement station; and press rods are provided below the mounting plate and respectively correspond to nuts in mounting holes on the outer shell body; and the invention is characterized in that ； The press-fitting rods are each provided with a heating structure for heating the press-fitting rods; the press-fitting rods include a press-fitting positioning section at the lower end and a connecting rod section at the upper end, and the diameter of the press-fitting positioning section matches the inner diameter of the nut; a vertical movement control mechanism is provided between the mounting plate and the support plate, and the vertical movement control mechanism can drive the press-fitting rod below the mounting plate to move toward the nut in the mounting hole of the outer shell shell, and after the press-fitting positioning section is correspondingly inserted and fitted in the nut, the press-fitting step surface formed between the press-fitting positioning section and the connecting rod section abuts and supports on the upper end surface of the nut to press the nut into the mounting hole of the mounting column.

2. A nut hot melt press-fitting device according to claim 1, characterized in that: A connecting head is provided at the upper end of the connecting rod section, and mounting holes are provided on the mounting plate corresponding to the connecting heads, and the connecting heads are installed in the mounting holes.

3. A nut hot melt press-fitting device according to claim 1, characterized in that: A chamfered angle structure is provided at the lower end of the press-fitting positioning section.

4. A nut hot melt press-fitting device according to claim 1, characterized in that: A placement hole designed as a blind hole structure is provided on the upper end surface of the press rod; the heating structure includes a heating resistor rod arranged in the placement hole, and the upper end of the heating resistor rod is connected to two pairs of power supply wires.

5. A nut hot melt press-fitting device according to claim 4, characterized in that: Mounting blocks are provided at the four corner positions on the upper surface of the mounting plate and correspond to the press-fitting rods respectively. A through hole is vertically penetrated on the mounting block, and the upper end of the heating resistor rod extends into the through hole; and the two paired power supply wires are passed upward to the outside of the through hole, and two connecting wires are also provided in pairs, and the two connecting wires are respectively electrically connected to the four groups of power supply wires.

6. A nut hot melt press-fitting device according to claim 1, characterized in that: A positioning block is provided on the upper surface of the seat plate and at two corner positions corresponding to the rear side of the outer shell shell. The positioning block is designed as an L-shaped structure as a whole; and the positioning block has a first positioning surface and a second positioning surface arranged vertically, the first positioning surface and the second positioning surface are arranged at right angles to each other, and the first positioning surface and the second positioning surface are connected by an arc surface; and the first positioning surface and the second positioning surface can be attached to the corner position of the rear side of the outer shell shell to limit the position of the outer shell shell.

7. The nut hot-melt press-fitting device according to claim 1, characterized in that: The support structure includes vertically arranged mounting support plates installed on both sides of the seat plate, and the support plate is installed above the mounting support plates; and a U-shaped structurally designed clearance opening is provided at the front end of each mounting support plate.

8. The nut hot-melt press-fitting device according to claim 1, characterized in that: The vertical movement control mechanism includes a driving cylinder installed in the middle position of the upper surface of the support plate and arranged vertically downward. The piston rod end of the driving cylinder is connected to a driving rod through a connecting sleeve, and the driving rod passes through a through hole provided in the center position of the support plate to the bottom of the support plate, and a threaded rod section is provided at the lower end of the driving rod and is threadedly connected to a threaded fixing hole provided in the middle of the mounting plate.

9. The nut hot-melt press-fitting device according to claim 1, characterized in that: Two guide rods arranged vertically upward are connected to the mounting plate, and the upper ends of the guide rods are correspondingly matched and arranged in the guide holes of the support plate.

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