Knob hot riveting device

Abstract

The utility model discloses a knob hot riveting device, including frame, conveying rail, shell feeding mechanism, nut feeding mechanism and clamping mechanism, its characterized in that: the nut feeding mechanism includes nut vibrating disk, with the feeding guide cylinder of nut vibrating disk connection, with the heating block of feeding guide cylinder bottom connection and locates the heating element in the heating block, and there is feeding inner hole in feeding guide cylinder, and one end is inserted and is connected the heating hole on heating block, and heating element heats the heating block. The device is through to the nut preheating, has strengthened the stability of nut and shell connection, has reduced shell cracking and nut loosening situation, and the nut feeding and heating link integration have simplified the assembly flow, have promoted the assembly efficiency, have reduced the production cost, and are applicable to the large -scale production.

Description

Technical Field

[0001] This utility model relates to the field of automation equipment technology, specifically a knob hot riveting device. Background Technology

[0002] In the fields of mechanical manufacturing and parts assembly, inserting nuts into various housings (such as audio knob housings) is a common process. The purpose is to provide a reliable threaded connection foundation for subsequent component assembly through a secure connection between the nut and the housing. Currently, most equipment used for inserting nuts into housings does not include a heating process for the nuts; instead, cold assembly is primarily used to complete the connection.

[0003] Among common cold assembly methods, cold pressing assembly is widely used. This method involves forcibly pressing a nut into a pre-set mounting hole in the housing using external force, utilizing the elastic deformation of the housing material to achieve a fastening. However, this assembly method, which does not heat the nut, requires extremely high dimensional accuracy of the mounting hole. Even slight deviations in the hole dimensions can easily lead to housing cracking or nut loosening. Furthermore, the stress concentration generated during cold pressing can severely affect the structural stability of the housing, resulting in a persistently high scrap rate, especially for housings made of brittle materials.

[0004] Besides cold-press assembly, adhesive bonding is also an installation method used in some unheated equipment. It involves applying adhesive to the mating surfaces of the nut and the housing, and then allowing the adhesive to cure to achieve a connection. However, this method is greatly affected by the adhesive's properties, the uniformity of the adhesive application, and the curing environment (temperature, humidity, etc.). Not only is the assembly efficiency low, but during long-term use, the adhesive is prone to losing its tackiness due to aging, temperature changes, and other factors, leading to connection failure. This makes it unsuitable for applications requiring high reliability.

[0005] In addition, some devices use traditional cold-connection methods such as mechanical snap-fit, relying on snaps, protrusions, etc. in the structural design to cooperate with the nut. However, this type of method often has strict requirements for the machining accuracy of the parts, and under long-term vibration and stress conditions, the snap-fit ​​structure is prone to wear and deformation, which can cause the nut to loosen, affecting the stability and service life of the overall assembly.

[0006] It is evident that existing assembly equipment that does not heat the nut generally suffers from insufficient connection reliability, low assembly efficiency, and a narrow range of applicable materials during the connection process between the housing and the nut. Therefore, there is an urgent need for a device that can heat-treat the nut to achieve a more secure and efficient insertion with the housing, thereby overcoming the shortcomings of existing equipment and improving overall assembly quality and production efficiency. Utility Model Content

[0007] In view of the shortcomings of the prior art, this utility model provides a knob hot riveting device.

[0008] The technical solution adopted by this utility model is: a knob hot riveting device, including a frame, a conveyor rail, a housing feeding mechanism, a nut feeding mechanism and a clamping mechanism. The nut feeding mechanism includes a nut vibrating plate, a feeding guide cylinder connected to the nut vibrating plate, a heating block connected to the bottom of the feeding guide cylinder and a heating element disposed in the heating block. The feeding guide cylinder is provided with a feeding inner hole, one end of the feeding guide cylinder extends into and is connected to the heating hole on the heating block, and the heating element is disposed in the heating block to heat the heating block.

[0009] Furthermore, the nut feeding mechanism also includes a lower support plate disposed on both sides of the heating block, an upper support plate fixed on the lower support plate, a lower pressure cylinder fixed on the upper support plate, a riveting rod connected to the lower pressure cylinder, a cylinder bracket fixed on the lower support plate, a pusher cylinder fixedly connected to the cylinder bracket, a receiving plate connected to the output end of the pusher cylinder, and a transition block fixed below the heating block. A receiving groove is formed between the transition block and the bottom surface of the heating block. The receiving plate is provided with a receiving port, and the receiving plate slides in conjunction with the receiving groove. The heating block and the transition block are provided with through holes for the riveting rod to pass through.

[0010] Furthermore, a pressing step is provided at the top of the rivet rod, and a nut sleeve is provided below the pressing step.

[0011] Furthermore, the through holes on the heating block and the transition block are connected to guide sleeves.

[0012] Furthermore, the clamping mechanism is located on both sides of the conveyor rail below the rivet rod, and includes clamping cylinders located on both sides of the conveyor rail and clamping blocks connected to the output end of the clamping cylinders. The clamping blocks are provided with arc-shaped clamping grooves.

[0013] Furthermore, the outer casing feeding mechanism includes a linear vibrating feeding rail, which is perpendicularly connected to the feeding end of the conveying rail. The feeding end of the conveying rail is provided with a pushing cylinder and a pushing rod connected to the output end of the pushing cylinder.

[0014] Furthermore, a cover plate is provided on one side of the conveyor rail at the feed end, and the cover plate is arranged parallel to the top of the conveyor rail.

[0015] The beneficial effects of this utility model are: 1. Enhanced Connection Stability: Preheating the nut via heating blocks and elements softens the material at the contact points with the housing during installation. The nut expands under heat, ensuring a tight fit with the mounting hole. Upon cooling, the connection is secure, reducing housing cracking and nut loosening. 2. Improved Assembly Efficiency: The nut feeding and heating processes are integrated. After entering the feed guide cylinder via a vibratory feeder, the nut is directly heated within the heating block, eliminating the need for additional steps. This simplifies the process, adapts to large-scale production, reduces housing and nut scrap due to improper assembly, improves material utilization, and helps reduce production time.

[0016] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. The utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a partial schematic diagram of the clamping mechanism.

[0019] Figure 3 This is a schematic diagram of the nut feeding mechanism.

[0020] Figure 4 This is a schematic diagram of the cross-section of the nut feeding mechanism.

[0021] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0022] Figure 6 This is a schematic diagram of the heating block and the receiving plate.

[0023] Figure 7 This is a schematic diagram of the heating block.

[0024] Figure 8 This is a schematic diagram of the rivet rod structure.

[0025] Figure 1-8Components: 1. Frame; 2. Conveyor rail; 3. Clamping mechanism; 4. Nut vibratory feeder; 5. Feed guide cylinder; 6. Heating block; 7. Heating element; 8. Feed inner hole; 9. Heating hole; 10. Lower support plate; 11. Upper support plate; 12. Pressing cylinder; 13. Riveting rod; 14. Cylinder bracket; 15. Pushing cylinder; 16. Receiving plate; 17. Transition block; 18. Receiving chute; 19. Receiving port; 20. Through hole; 21. Pressing step; 22. Nut sleeve; 23. Guide sleeve; 24. Clamping cylinder; 25. Clamping block; 26. Arc-shaped clamping groove; 27. Straight vibratory feed rail; 28. Feeding end; 29. ​​Pushing cylinder; 30. Pushing rod; 31. Cover plate; 32. Outer shell; 33. Nut. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0028] This utility model provides a knob hot riveting device.

[0029] In this embodiment, refer to Figure 1-8 The knob hot riveting device includes a frame 1, a conveyor rail 2, a housing feeding mechanism, a nut feeding mechanism, and a clamping mechanism 3. The nut feeding mechanism includes a nut vibrating plate 4, a feeding guide cylinder 5 connected to the nut vibrating plate 4, a heating block 6 connected to the bottom of the feeding guide cylinder 5, and a heating element 7 disposed in the heating block 6. The feeding guide cylinder is provided with a feeding inner hole 8, and one end of the feeding guide cylinder extends into and is connected to a heating hole 9 on the heating block. The heating element is disposed in the heating block to heat the heating block.

[0030] In the above technical solution, the nut vibratory feeder orderly conveys the nuts to the feed guide cylinder. The feed guide cylinder's inner hole guides the nuts into the heating holes of the heating block. The heating element inside the heating block heats the heating block, and then preheats the feed guide cylinder and nuts in the heating holes through heat conduction. The conveyor rail realizes the conveying of the outer shell, the outer shell feeding mechanism is responsible for supplying the outer shell (such as the vibratory feeder and linear vibratory conveyor rail commonly used in the field of automation equipment), and the clamping mechanism fixes the outer shell during riveting.

[0031] By preheating the nut, the material at the contact point with the outer shell 32 is appropriately softened when the nut is inserted into the outer shell 32. At the same time, the nut 33 expands due to heat and fits tightly with the mounting hole. After cooling, the stability of the connection between the two is significantly enhanced, reducing the cracking of the outer shell and the loosening of the nut. The nut feeding and heating process is integrated, which simplifies the assembly process, improves the assembly efficiency, and provides convenience for large-scale production.

[0032] Specifically, the nut feeding mechanism further includes a lower support plate 10 disposed on both sides of the heating block, an upper support plate 11 fixed on the lower support plate 10, a lower pressure cylinder 12 fixed on the upper support plate 11, a riveting rod 13 connected to the lower pressure cylinder 12, a cylinder bracket 14 fixed on the lower support plate, a pusher cylinder 15 fixed to the cylinder bracket 14, a receiving plate 16 connected to the output end of the pusher cylinder 15, and a transition block 17 fixed below the heating block. A receiving groove 18 is formed between the transition block 17 and the bottom surface of the heating block. A receiving port 19 is provided on the receiving plate, and the receiving plate slides in cooperation with the receiving groove. Through holes 20 for the riveting rod to pass through are provided on the heating block and the transition block.

[0033] In this embodiment, the nut feeding mechanism includes additional components such as a lower support plate, an upper support plate, a lower pressing cylinder, a riveting rod, a cylinder bracket, a pushing cylinder, a receiving plate, and a transition block. The heated nut enters the receiving groove formed by the transition block and the bottom surface of the heating block from the heating block. The pushing cylinder pushes the receiving plate to slide within the receiving groove. The receiving port of the receiving plate receives the nut and pushes it to the through hole. Subsequently, the lower pressing cylinder drives the riveting rod through the through holes on the heating block and the transition block, pressing the nut into the outer casing. The lower and upper support plates provide support and mounting references for each component, and the cylinder bracket fixes the pushing cylinder to ensure its stable operation.

[0034] The cooperation between the receiving plate and the pushing cylinder enables the delivery and positioning of the nut, while the coordinated action of the riveting rod and the pressing cylinder ensures that the nut can be accurately and stably pressed into the shell, further improving the assembly accuracy and reliability. The orderly cooperation of each component makes the entire feeding and pressing process more automated, reduces manual intervention, and improves production efficiency.

[0035] Specifically, the top of the rivet rod is provided with a pressing step 21, and a nut sleeve 22 is provided below the pressing step.

[0036] In this embodiment, during the pressing process of the riveting rod, the nut sleeve can be fitted into the nut, and the pressing step of the riveting rod presses the nut sleeve into the outer shell.

[0037] Specifically, the through holes on the heating block and the transition block are connected to guide sleeves 23.

[0038] In this embodiment, the through holes on the heating block and the transition block are connected to guide sleeves. The guide sleeves guide the riveting rod passing through the through holes, restricting the movement trajectory of the riveting rod so that it can only move up and down along the axial direction of the through holes.

[0039] Specifically, the clamping mechanism is located on both sides of the conveyor rail below the rivet rod, and includes clamping cylinders 24 located on both sides of the conveyor rail and clamping blocks 25 connected to the output end of the clamping cylinders 24. The clamping blocks 25 are provided with arc-shaped clamping grooves 26.

[0040] In this embodiment, the clamping mechanism is set on both sides of the conveyor rail below the riveting rod. When the outer shell is conveyed to the riveting position, the clamping cylinders on both sides drive the clamping blocks to move towards the middle. The arc-shaped clamping groove on the clamping block matches the shape of the outer shell, thereby firmly fixing the outer shell on the conveyor rail and preventing the outer shell from shifting during the nut pressing process.

[0041] Specifically, the outer casing feeding mechanism includes a linear vibrating feeding rail 27, which is vertically connected to the feeding end 28 of the conveying rail. The feeding end of the conveying rail is provided with a pushing cylinder 29 and a pushing rod 30 connected to the output end of the pushing cylinder 29.

[0042] In this embodiment, the direct vibration feeding rail of the outer shell feeding mechanism is vertically connected to the feeding end of the conveying rail. The direct vibration feeding rail conveys the outer shell to the feeding end of the conveying rail in an orderly manner through vibration. Then, the pushing cylinder drives the pushing rod to push the outer shell located at the feeding end in an orderly manner.

[0043] Specifically, a cover plate 31 is provided on one side of the conveyor rail at the feed end, and the cover plate 31 is arranged parallel above the conveyor rail.

[0044] In this embodiment, a cover plate is provided on one side of the conveyor rail at the feeding end, parallel to the top of the conveyor rail. The cover plate limits the outer shell on the conveyor rail, preventing the outer shell from tilting upward or detaching from the conveyor rail due to vibration, collision or other reasons during conveying or pushing.

[0045] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A knob hot riveting device, comprising a frame, a conveyor rail, a housing feeding mechanism, a nut feeding mechanism, and a clamping mechanism, characterized in that: The nut feeding mechanism includes a nut vibrating plate, a feeding guide cylinder connected to the nut vibrating plate, a heating block connected to the bottom of the feeding guide cylinder, and a heating element disposed in the heating block. The feeding guide cylinder has a feeding inner hole, one end of the feeding guide cylinder extends into and connects to the heating hole on the heating block, and the heating element is disposed in the heating block to heat the heating block.

2. The knob hot riveting device according to claim 1, characterized in that: The nut feeding mechanism also includes a lower support plate disposed on both sides of the heating block, an upper support plate fixed on the lower support plate, a lower pressure cylinder fixed on the upper support plate, a riveting rod connected to the lower pressure cylinder, a cylinder bracket fixed on the lower support plate, a pusher cylinder fixed to the cylinder bracket, a receiving plate connected to the output end of the pusher cylinder, and a transition block fixed below the heating block. A receiving groove is formed between the transition block and the bottom surface of the heating block. The receiving plate is provided with a receiving port, and the receiving plate slides in conjunction with the receiving groove. The heating block and the transition block are provided with through holes for the riveting rod to pass through.

3. The knob hot riveting device according to claim 2, characterized in that: The top of the rivet rod is provided with a pressing step, and a nut sleeve is provided below the pressing step.

4. The knob hot riveting device according to claim 2, characterized in that: The through holes on the heating block and the transition block are connected to guide sleeves.

5. The knob hot riveting device according to claim 4, characterized in that: The clamping mechanism is located on both sides of the conveyor rail below the rivet rod. It includes clamping cylinders located on both sides of the conveyor rail and clamping blocks connected to the output end of the clamping cylinders. The clamping blocks are provided with arc-shaped clamping grooves.

6. The knob hot riveting device according to claim 1, characterized in that: The outer casing feeding mechanism includes a linear vibrating feeding rail, which is perpendicularly connected to the feeding end of the conveying rail. The feeding end of the conveying rail is equipped with a pushing cylinder and a pushing rod connected to the output end of the pushing cylinder.

7. The knob hot riveting device according to claim 6, characterized in that: A cover plate is provided on one side of the conveyor rail at the feed end, and the cover plate is arranged parallel to the top of the conveyor rail.

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