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CN-121989003-A - Screw feeding device and brush head shell assembling equipment using same

CN121989003ACN 121989003 ACN121989003 ACN 121989003ACN-121989003-A

Abstract

The invention discloses a screw supply device and brush head shell assembly equipment using the same, and relates to the technical field of automatic assembly equipment. The screw feeding device comprises a screw feeding mechanism, a conveying pipeline, a temporary storage module and a driving mechanism. The conveying pipeline can realize queuing and buffering of screws, a stop valve is arranged at the tail end of the conveying pipeline to control the screws to enter the temporary storage cavity, a piston capable of moving up and down is arranged in the temporary storage cavity and moves synchronously with the screw driver, a closed air chamber with variable volume is formed between the piston and the inner wall of the temporary storage cavity, and an elastic sealing furling structure is arranged at the bottom of the temporary storage cavity. When the screw locking device works, the piston presses down the compressed air chamber gas to realize stable posture of the screw, the contact between the screw driver and the head of the screw is buffered by utilizing the air cushion effect, and then the screw driver rotates and pushes the screw out of the locking device. The invention solves the problems of low efficiency, unstable tail end posture, easy damage of screw head and the like caused by rigid coupling of the traditional screw machine conveying and locking, and realizes high-stability, high-efficiency and high-quality automatic assembly.

Inventors

  • XU XIAOLI

Assignees

  • 苏州莱尔特清洁器具有限公司

Dates

Publication Date
20260508
Application Date
20260128

Claims (10)

  1. 1. The screw feeding device and the application thereof are characterized by comprising a screw feeding mechanism (1); The inlet end of the conveying pipeline (2) is connected to the output end of the screw feeding mechanism (1); the temporary storage module (3) is internally provided with a temporary storage cavity (31), and the temporary storage cavity (31) is connected with the tail end of the conveying pipeline (2); The driving mechanism comprises a screw driver (73) which can extend into the temporary storage cavity (31) and a piston (72) which is arranged in the temporary storage cavity (31) and can move up and down, the piston (72) is in sealing fit with the inner wall of the temporary storage cavity (31) and is connected with the screw driver (73) so as to move up and down synchronously, and a closed air chamber with variable volume is formed by enclosing between the piston (72) and the inner wall of the temporary storage cavity (31); Wherein, bottom discharge gate (32) department in temporary storage chamber (31) is provided with the sealed structure of drawing in of elasticity.
  2. 2. Screw feeder according to claim 1, characterized in that the end of the delivery conduit (2) is provided with a shut-off valve.
  3. 3. Screw feeder according to claim 2, characterized in that the conveying pipe (2) is provided with an incoming sensor for detecting the passage of screws.
  4. 4. A screw feeder according to claim 1, characterized in that the resilient sealing gathering structure comprises at least two resilient metal flaps (33), the inner walls of the resilient metal flaps (33) being attached with a flexible rubber sealing layer.
  5. 5. A screw feeding device according to claim 1, wherein said driving mechanism further comprises a driving unit (71) for driving said screw driver (73) and said piston (72) to move up and down synchronously, and a screwing motor (74) for driving said screw driver (73) to rotate.
  6. 6. Screw feeder according to claim 1, further comprising a lubrication mechanism (4), said lubrication mechanism (4) comprising a micro lubrication pump and a plurality of lubrication point outlets connected thereto by means of a pipeline, the spout of at least one of said lubrication point outlets being directed towards the inner wall of said temporary storage chamber (31) and towards the inner wall of said elastic sealing gathering structure.
  7. 7. A screw feeder according to claim 6, characterized in that the spout of at least one of said lubrication point outlets is directed towards the portion of said screw driver (73) protruding into said holding cavity (31).
  8. 8. Screw feeder according to claim 6, characterized in that at least one of the lubrication point outlets is arranged in the conveying conduit (2).
  9. 9. A brush head housing assembly apparatus employing the screw supply device according to any one of claims 1 to 8, characterized by comprising a rotary table (5) driven to rotate by a motor; at least one mould (6) mounted on the rotary table (5) for placing the brush head housing to be assembled; And a control system for controlling the operation timings of the rotary table (5), the screw supply device, and the driving mechanism in a coordinated manner.
  10. 10. The brushhead housing assembly apparatus of claim 9, wherein the control system is configured to control the drive mechanism to drive the piston (72) downward to compress the gas in the enclosed air chamber after the escrow chamber (31) receives a screw, and to control the screwdriver (73) to rotate and press downward to push the screw out of the escrow chamber (31) and lock to the brushhead housing.

Description

Screw feeding device and brush head shell assembling equipment using same Technical Field The application relates to the technical field of automatic assembly equipment, in particular to a screw supply device and brush head shell assembly equipment using the same. Background The automatic screw locking machine is used as key equipment for realizing assembly automation, and has the core task of screwing screws into threaded holes of workpieces rapidly, accurately and reliably. Among them, the blowing type screw locking machine is widely used because of high conveying efficiency and flexible path. However, in pursuing higher precision and reliability, the existing mainstream technical solutions have inherent drawbacks at both the level of screw delivery logic and end execution control. The current mainstream blowing type technology generally adopts a single instant conveying mode in which a screw feeding device and a locking action are strictly linked. Every time a screw is locked, the feeding device supplies one screw and directly blows the screw to the batch nozzle through air flow. This rigidly coupled transport lock mode has the following significant drawbacks: First, the system is vulnerable to beat and low in fault tolerance. The beat of the whole system is completely dependent on the slowest link in the chain. Once the screw feeding device has instant clamping or feeding delay due to poor feeding posture, the locking unit can be immediately used without nails, so that equipment is free to beat or stop, and the like, and the overall efficiency and stability of the equipment are seriously restricted. This contradiction is particularly pronounced in high-speed, high-density lock scenarios. Secondly, the air flow control is complex, and energy is wasted. Each time a single screw is delivered, the high pressure air flow needs to be started and stopped. Frequent solenoid valve opening and closing not only brings noise and abrasion, but also brings challenges to stability control of air flow. To ensure that a single screw can be reliably blown to a terminal point that is several meters away, it is often necessary to maintain a high air supply pressure, resulting in wasted energy. The screw is sent to waiting position, the prior art solution still has a bottleneck before final locking: First, the screw posture has an unstable problem. The screw is restrained in the delivery conduit, but is normally limited by a simple mechanical folding structure and is in a mechanically free state before falling into the end waiting cavity to contact the workpiece. When the screwdriver head drives the screwdriver head to move downwards and touch the surface of the workpiece, the contact counter force is very easy to cause the screw to incline or rotate axially, so that sliding teeth, scratching the workpiece or screwing failure is caused. Secondly, there is a problem of damage to the screw head caused by the rigid contact. The contact between the screwdriver bit and the driving groove of the screw head belongs to rigid collision. When the centering is slightly deviated, the tips of the screwdriver heads can collide with the edges of the notches with larger impact force, so that the screw notches are collapsed or burrs are generated. Such damage is implicit, but can lead to slippage of the batch head during subsequent product maintenance and disassembly, severely compromising product maintainability. Existing solutions lack an active buffer protection mechanism for this contact moment. Thirdly, there are design contradictions of sealing, lubrication and pushing out. If the terminal furling structure is designed to be too tight for ensuring the air tightness, the screw is prevented from being successfully pushed out finally, and if lubrication is added or gaps are increased for smooth pushing out, the air tightness is destroyed, so that any design which tries to use the internal air pressure for stability fails. Existing designs tend to fall into a dilemma. In summary, the existing automatic screw locking technology is limited by a frame of single instant conveying and open-loop control of the tail end, and the defects of the existing automatic screw locking technology are that the conveying beat rigidity limits the upper efficiency limit, the logic contradiction between conveying and tail end stabilization causes the reliability problem, and the assembly quality is directly damaged due to the lack of precise pneumatic control and buffer protection of the tail end. Disclosure of Invention In order to solve the problems, the application provides a screw supply device and brush head shell assembling equipment using the same. The screw feeding device comprises a screw feeding mechanism, a conveying pipeline, a temporary storage module and a driving mechanism, wherein an inlet end of the conveying pipeline is connected to an output end of the screw feeding mechanism, a temporary storage cavity is formed in the temporary storage mod