An electric toothbrush shaft core assembling machine and an electric toothbrush shaft core assembling method

Abstract

The application relates to the technical field of electric toothbrush production, in particular to an electric toothbrush shaft core assembling machine and an assembling method, which comprise a machine table, a rotating driving mechanism, a rotating disc, a plurality of carriers, a shaft rod feeding device, a shaft sleeve sleeving device, a flattening position device, a spinning assembling joint device, a fixed-length assembling joint device and a fixed-length assembling feeding device; the shaft rod feeding device feeds shaft rods to the carriers; the shaft sleeve sleeving device sleeves shaft sleeves on the shaft rods; the flattening position device flattens the top end of the shaft rod to form a flattening position; the spinning assembling joint device spins and assembles joints on the flattening position of the shaft rod; the fixed-length assembling joint device fixedly assembles joints on the shaft rod; and the fixed-length assembling feeding device transfers the shaft rod with the assembled joint to the fixed-length assembling joint device. The application can automatically realize the feeding of the shaft rod, the sleeving of the shaft sleeve, the flattening of the shaft rod, the spinning assembly of the joint and the fixed-length assembly of the joint, and improves the production efficiency and quality of the electric toothbrush shaft core.

Description

Technical Field

[0001] This invention relates to the field of electric toothbrush manufacturing technology, and in particular to an electric toothbrush shaft assembly machine and an electric toothbrush shaft assembly method. Background Technology

[0002] In the production of electric toothbrush shafts, the shaft, bushing, and connector need to be assembled together. Existing patents, such as Chinese patent application number 201822113430.0, disclose an automatic shaft assembly machine, including a bushing vibratory feeder, a shaft unloading bin, and an assembly platform. The assembly platform includes a groove plate and a guide block located on one side of the groove plate. The groove plate has a first slot for accommodating the shaft (shaft), and a movable plate for supporting the shaft is located at the bottom of the first slot. The guide block has a cavity adapted to the bushing, and a second slot corresponding to the first slot is located on one side of the guide block. The bushing vibratory feeder is located above the guide block, and its outlet communicates with the cavity. The shaft unloading bin is located above the groove plate, and one end of the groove plate has a pressing mechanism for pressing the shaft that falls into the first slot into the bushing. By setting up a bushing vibratory feeder, a shaft core feeding bin, a movable plate for supporting the shaft core, and a pressing mechanism, the shaft core (shaft rod) is pressed into the bushing, replacing manual assembly. However, this patent document can only realize the assembly of the shaft rod and the bushing, and cannot realize the automated assembly of the shaft rod, the bushing, and the joint, making it difficult to improve the production efficiency and quality of shaft cores.

[0003] In addition, Chinese patent application No. 202222760179.3 discloses an electric toothbrush inner shaft assembly machine, including a frame with a platform on the frame. The assembly machine also includes a turntable mechanism, which includes a turntable rotatably mounted on the platform and a power unit connected to the turntable drive and driving the turntable to make circular motion. The power unit is fixed to the bottom surface of the platform, the edge of the turntable, and six sets of clamping mechanisms distributed in a ring array. On the platform surrounding the turntable, six workstations are distributed in a ring array, and the six sets of clamping mechanisms are aligned with the six workstations after each rotation angle. This patent uses a turntable to move the product and sets up loading and processing workstations around the turntable, so that each process is completed mechanically and automatically. However, this patent realizes the assembly of the inner shaft, spring and T-pin, which is different from the assembly of shaft, bushing and connector, and cannot realize the assembly of shaft, bushing and connector.

[0004] Therefore, the defects are very obvious, and a solution is urgently needed. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the purpose of this invention is to provide an electric toothbrush shaft assembly machine and an electric toothbrush shaft assembly method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electric toothbrush shaft assembly machine includes a machine base, a rotation drive mechanism mounted on the machine base, a turntable mounted on the rotating end of the rotation drive mechanism, multiple carriers arranged in a circular array on the turntable, and shaft feeding devices, bushing fitting devices, flattening devices, spinning assembly joint devices, and fixed-length assembly joint devices respectively mounted on the machine base and distributed sequentially around the turntable. The machine base is equipped with a fixed-length assembly feeding device. The shaft feeding device is used to feed shafts onto the carriers. The bushing fitting device is used to fit bushings onto the shafts. The flattening device is used to press and form a flat position at the top of the shaft. The spinning assembly joint device is used to spin and assemble the joint at the flat position of the shaft. The fixed-length assembly joint device is used to assemble the joint at a fixed length onto the shaft. The fixed-length assembly feeding device is used to transfer the shafts with assembled joints carried by the carriers to the fixed-length assembly joint device.

[0008] Furthermore, the shaft feeding device includes a shaft feeding mechanism, a shaft transfer mechanism disposed at the discharge end of the shaft feeding mechanism, and a flipping feeding mechanism corresponding to the shaft transfer mechanism. The shaft feeding mechanism is used to supply shafts to the shaft transfer mechanism, the shaft transfer mechanism is used to transfer the shafts to the flipping feeding mechanism, and the flipping feeding mechanism is used to flip the shafts 180° and feed them onto the carrier.

[0009] Furthermore, the shaft transfer mechanism includes a transfer frame mounted on the machine base, a shaft receiving seat movably disposed at the discharge end of the shaft feeding mechanism, a shaft receiving driver mounted on the transfer frame for driving the shaft receiving seat closer to or away from the flipping feeding mechanism, a material support block movably disposed at the discharge end of the shaft feeding mechanism and disposed opposite to the shaft receiving seat, and a material support driver mounted on the transfer frame for driving the material support block closer to or away from the shaft receiving seat. The shaft receiving seat is provided with an open shaft receiving groove for connecting with the discharge end of the shaft feeding mechanism, and the material support block can extend into the open shaft receiving groove.

[0010] Furthermore, the bushing assembly includes a bushing vibratory plate mounted on the machine tool, a bushing frame mounted on the machine tool, a base mounted on the bushing frame, a support seat mounted on the end of the base away from the bushing frame, a pressing bushing driver mounted on the support seat, a pressing rod mounted on the drive end of the pressing bushing driver, a receiving bushing driver mounted on the bushing frame, and a receiving bushing block mounted on the drive end of the receiving bushing driver. A horizontal groove is provided in the middle of the base, and the receiving bushing block is slidably disposed within the groove. The base has a connecting sleeve hole, a feed hole that communicates with the slide groove is recessed on the top surface of one end of the base, and a notch that communicates with the slide groove is recessed on the other end of the base. The pressure rod is set in accordance with the notch. A discharge hole is opened on the bottom wall of the end of the slide groove away from the feed hole. The connecting sleeve hole is used to connect with the feed hole or the discharge hole. The feed hole is connected to the discharge port of the sleeve vibrating plate through the material pipe. The pressure rod drive is used to drive the pressure rod to rise and fall. The connecting sleeve drive is used to drive the connecting sleeve block to move horizontally along the slide groove. The pressure rod can pass through the connecting sleeve hole and the discharge hole.

[0011] Furthermore, the bushing assembly also includes a first support shaft mechanism mounted on the bushing frame and located below the base, and a first shaft sensor disposed on the main body of the first support shaft mechanism. The first shaft sensor is electrically connected to the pressing bushing driver.

[0012] Furthermore, the flattening device includes a flattening frame, a flattening lifting seat that is slidably connected to the flattening frame, a flattening lifting drive mechanism mounted on the flattening frame and used to drive the flattening lifting seat to rise and fall, a flattening lifting block that is slidably connected to the flattening lifting seat, a flattening lifting driver mounted on the flattening lifting seat and used to drive the flattening lifting block to rise and fall, a flattening assembly disposed below the flattening lifting block, and a second support shaft mechanism mounted at the bottom of the flattening lifting seat and located below the flattening assembly. The flattening assembly includes a fixed base, an elastic tension member, an elastic member, two symmetrically arranged swing arms, and two symmetrically arranged... The flattening lifting block has two symmetrically arranged sliding blocks and two driving inclined surfaces on the bottom sides. The fixed base has rotating cavities on both sides, and the two rotating cavities are respectively arranged one-to-one with the two swing arms. The middle part of the swing arm is rotatably connected to the two opposite side walls of the rotating cavity. The upper middle part of the two swing arms is elastically connected by an elastic puller. The top of the two swing arms abuts against the two driving inclined surfaces respectively. The two sliding blocks are horizontally slidably connected to the bottom of the fixed base. The two sliding blocks are located between the bottom ends of the two swing arms. The bottom ends of the two swing arms are used to abut against the two sliding blocks respectively. The two pressing knives are respectively installed on the two sliding blocks. The elastic element is clamped between the two sliding blocks.

[0013] Furthermore, the spinning assembly device includes a connector supply mechanism mounted on the machine base, a connector seat mounted on the discharge end of the connector supply mechanism, a lifting mechanism mounted on the machine base for lifting the connector received by the connector seat, a third support shaft mechanism located on one side of the connector seat and on the periphery of the turntable, a loading and unloading robot mounted on the machine base, and a picking spinning assembly mechanism located at the output end of the loading and unloading robot. The picking spinning assembly mechanism is movably mounted above the connector seat and the carrier.

[0014] Furthermore, the picking and spinning assembly mechanism includes a pressure driver installed at the output end of the loading and unloading robot and a rotary gripper cylinder installed at the pressure end of the pressure driver. The rotating part of the rotary gripper cylinder is equipped with a fixed ring, and the fixed ring is provided with a pressure block. The pressure block is located in the space formed by the two grippers of the rotary gripper cylinder.

[0015] Furthermore, the fixed-length assembly joint device includes a fixed-length assembly frame mounted on the machine base, a support plate disposed in the middle of the fixed-length assembly frame, a fixed-length assembly bottom mold mounted on the support plate, a feeding track mounted on the fixed-length assembly frame or machine base and located on one side of the support plate, a fixed-length assembly driver mounted on the top of the fixed-length assembly frame, a fixed-length assembly pressure head mounted on the drive end of the fixed-length assembly driver and corresponding to the fixed-length assembly bottom mold, a feeding driver mounted on the support plate, a clamping driver mounted on the drive end of the feeding driver, and two clamping blocks respectively mounted on the two clamping ends of the clamping driver. The clamping driver is used to drive the two clamping blocks to move closer or further away from each other. The feeding driver is used to drive the clamping driver and the two clamping blocks to reciprocate between the fixed-length assembly bottom mold and the feeding track above. An opening clearance groove is provided in the middle of the two clamping blocks. The opening clearance groove is used for the feeding end of the fixed-length assembly feeding device to move in or out. The fixed-length assembly driver is used to drive the fixed-length assembly pressure head to move closer or further away from the fixed-length assembly bottom mold.

[0016] Furthermore, the electric toothbrush shaft assembly machine also includes a second shaft sensor installed on the machine base and located between the shaft feeding device and the bushing assembly device, a bushing sensor installed on the machine base and located between the bushing assembly device and the flattening device, and a fourth support shaft mechanism installed on the machine base and located between the spinning assembly joint device and the fixed-length assembly joint device. The main body of the fourth support shaft mechanism is equipped with a joint sensor. The second shaft sensor, the bushing sensor, and the fourth support shaft mechanism are all distributed around the turntable.

[0017] The present invention also provides a method for assembling an electric toothbrush shaft, based on the application of the above-mentioned electric toothbrush shaft assembly machine, comprising the following methods:

[0018] A rotary drive mechanism drives a turntable to rotate intermittently, causing each carrier to rotate sequentially to a position below the shaft feeding device, the bushing fitting device, the flattening device, the spinning assembly joint device, and the fixed-length assembly joint device. The shaft feeding device feeds the shaft onto the carrier, the bushing fitting device fits the bushing onto the shaft carried by the carrier, the flattening device flattens the top of the shaft with the bushing, the spinning assembly joint device spins the joint onto the flattened part of the shaft, and the fixed-length assembly joint device assembles the joint spun onto the flattened part of the shaft to a fixed length, ensuring that the joint is accurately assembled to the target position on the shaft and that the joints are aligned in position to complete the assembly of the electric toothbrush shaft core.

[0019] The beneficial effects of this invention are as follows: In practical applications, the rotary drive mechanism drives the turntable to intermittently rotate multiple carriers, causing each carrier to rotate sequentially to a position below the shaft feeding device, the bushing fitting device, the flattening device, the spinning assembly joint device, and the fixed-length assembly joint device. The shaft feeding device feeds the shaft onto the carrier, the bushing fitting device fits the bushing onto the shaft carried by the carrier, the flattening device flattens the top of the shaft with the bushing fitted, the spinning assembly joint device spins the joint onto the flattened part of the shaft, and the fixed-length assembly joint device assembles the joint spun onto the flattened part of the shaft to a fixed length on the shaft. This ensures that the joints are accurately assembled in the appropriate positions on the shaft, guaranteeing consistent joint positions and thus ensuring the quality and consistency of the assembled electric toothbrush cores. This invention automates the shaft feeding, bushing fitting, shaft flattening, joint spinning assembly, and joint fixed-length assembly, improving the efficiency and quality of electric toothbrush core production. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a three-dimensional structural diagram of the shaft feeding device of the present invention.

[0022] Figure 3 This is a three-dimensional structural diagram of the bushing device of the present invention after concealing the bushing vibrating disc.

[0023] Figure 4 This is a cross-sectional view of the bushing assembly of the present invention with the bushing vibrating disc hidden.

[0024] Figure 5 This is a three-dimensional structural diagram of the first support shaft mechanism and the first shaft sensor of the present invention.

[0025] Figure 6 This is a three-dimensional structural schematic diagram of the flattening device of the present invention.

[0026] Figure 7 This is a three-dimensional structural schematic diagram of the flattening device of the present invention from another perspective.

[0027] Figure 8 This is a three-dimensional structural diagram of the spinning assembly joint device of the present invention.

[0028] Figure 9 This is a three-dimensional structural diagram of the pick-up spinning assembly mechanism of the present invention.

[0029] Figure 10 This is a three-dimensional structural diagram of the fixed-length assembly joint device of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. Machine base; 2. Turntable; 3. Carrier; 4. Shaft feeding device; 5. Bushing assembly device; 6. Flattening device; 7. Spinning assembly joint device; 8. Fixed-length assembly joint device; 9. Fixed-length assembly feeding device; 10. Shaft feeding mechanism; 11. Shaft transfer mechanism; 12. Tilting feeding mechanism; 13. Shaft vibrating plate; 14. Shaft track; 15. Shaft linear vibrating feeder; 16. Transfer frame; 17. Shaft connecting seat; 18. Shaft connecting driver; 19. Material support block; 20. Material support driver; 21. Open shaft connecting slot; 22. Tilting feeding frame; 23. Tilting feeding translation driver; 24. Tilting and feeding lifting driver; 25. Tilting driver; 26. Shaft clamping driver; 27. Shaft clamping block; 28. Shaft sleeve vibrating plate; 29. ​​Shaft sleeve mounting bracket; 30. Base; 31. Support base; 32. Pressing mounting driver; 33. Pressing rod; 34. Shaft sleeve connecting driver; 35. Shaft sleeve connecting block; 36. Slide groove; 37. Shaft sleeve connecting hole; 38. Feed hole; 39. Notch; 40. Discharge hole; 41. Material tube; 42. Center hole; 43. First shaft support mechanism; 44. First shaft sensor; 45. Clamping driver; 46. Clamping component; 47. Clamping groove; 48. Receiving groove; 4 9. Flattening frame; 50. Flattening lifting seat; 51. Flattening lifting drive mechanism; 52. Flattening lifting block; 53. Flattening lifting driver; 54. Flattening assembly; 55. Second support shaft mechanism; 56. Fixed seat; 57. Elastic pull member; 58. Elastic member; 59. Swing arm; 60. Pressing knife; 61. Drive inclined plane; 62. Rotating cavity; 63. Rotating block; 64. Supply connector mechanism; 65. Connector seat; 66. Lifting mechanism; 67. Third support shaft mechanism; 68. Loading and unloading robot; 69. Pick-up spinning assembly mechanism; 70. Downward driver; 71. Rotary gripper cylinder; 72. 73. Fixed ring; 74. Pressure block; 75. Vibratory feeder for connector; 76. Connector track; 77. Connector linear vibratory feeder; 78. Connector slot; 79. Fixed-length assembly frame; 80. Support plate; 81. Fixed-length assembly bottom mold; 82. Unloading track; 83. Fixed-length assembly driver; 84. Fixed-length assembly pressure head; 85. Unloading driver; 86. Clamping driver; 87. Clamping block; 88. Opening clearance slot; 89. Connector slot; 90. Support shaft slot; 91. Step; 92. Second shaft sensor; 93. Bushing sensor; 94. Fourth support shaft mechanism; 95. Connector sensor; 96. Slider. Detailed Implementation

[0032] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0033] like Figures 1 to 10As shown, the present invention provides an electric toothbrush shaft assembly machine, which includes a machine base 1, a rotation drive mechanism mounted on the machine base 1, a turntable 2 mounted on the rotating end of the rotation drive mechanism, a plurality of carriers 3 arranged in a circular array on the turntable 2, and shaft feeding device 4, bushing fitting device 5, flattening device 6, spinning assembly joint device 7, and fixed-length assembly joint device 8 respectively mounted on the machine base 1 and distributed sequentially on the periphery of the turntable 2. The machine base 1 is equipped with a fixed-length assembly feeding device 9. The shaft feeding device 4 is used to feed the shaft onto the carrier 3. The bushing fitting device 5 is used to fit the bushing onto the shaft. The flattening device 6 is used to press and form a flat position at the top of the shaft. The spinning assembly joint device 7 is used to spin and assemble the joint at the flat position of the shaft. The fixed-length assembly joint device 8 is used to assemble the joint at a fixed length on the shaft. The fixed-length assembly feeding device 9 is used to transfer the shaft with the assembled joint carried by the carrier 3 to the fixed-length assembly joint device 8.

[0034] In practical applications, the rotary drive mechanism drives the turntable 2 to rotate intermittently along with multiple carriers 3. Each carrier 3 rotates sequentially to the area below the shaft feeding device 4, the bushing fitting device 5, the flattening device 6, the spinning assembly joint device 7, and the fixed-length assembly joint device 8. The shaft feeding device 4 feeds the shaft onto the carrier 3. The bushing fitting device 5 fits the bushing onto the shaft carried by the carrier 3. The flattening device 6 flattens the top of the shaft with the bushing fitted with the bushing to form a flat position. The spinning assembly joint device 7 spins and assembles the joint at the flat position of the shaft. The fixed-length assembly joint device 8 assembles the joint spun and assembled at the flat position of the shaft to a fixed length onto the shaft. This ensures that the joints can be accurately assembled in the appropriate positions on the shaft, guaranteeing that the joints are consistently positioned on the shaft, thereby ensuring the quality and consistency of the assembled electric toothbrush core. This invention automates the feeding of the shaft, the assembly of the bushing, the flattening of the shaft, the spinning assembly of the connector, and the fixed-length assembly of the connector, thereby improving the efficiency and quality of producing electric toothbrush shaft cores.

[0035] In this embodiment, the shaft feeding device 4 includes a shaft feeding mechanism 10, a shaft transfer mechanism 11 disposed at the discharge end of the shaft feeding mechanism 10, and a flipping feeding mechanism 12 disposed corresponding to the shaft transfer mechanism 11. The shaft feeding mechanism 10 is used to supply shafts to the shaft transfer mechanism 11, the shaft transfer mechanism 11 is used to transfer the shafts to the flipping feeding mechanism 12, and the flipping feeding mechanism 12 is used to flip the shafts 180° and feed them onto the carrier 3. The flipping feeding end of the flipping feeding mechanism 12 is located below the transfer end of the shaft transfer mechanism 11.

[0036] In practical applications, the shaft feeding mechanism 10 supplies shafts to the transfer end of the shaft transfer mechanism 11. The transfer end of the shaft transfer mechanism 11 transfers the shaft to the flipping and loading end of the flipping and loading mechanism 12. At this time, the head of the shaft faces upward and the shaft shaft faces downward. While the flipping and loading mechanism 12 flips the shaft 180°, it places the flipped shaft on the corresponding carrier 3, so that the head of the shaft is placed downward in the loading hole of the carrier 3, and the shaft shaft is upward and extends out of the loading hole of the carrier 3. Because the head of the shaft is relatively heavy, when the shaft feeding mechanism 10 supplies the shaft, the head of the shaft faces upward under the action of gravity. Therefore, before loading the shaft onto the carrier 3, it is necessary to flip the shaft 180° so that the head of the shaft faces downward.

[0037] Specifically, the shaft feeding mechanism 10 includes a shaft vibratory plate 13 mounted on the machine base 1, a shaft track 14 connected to the discharge end of the shaft vibratory plate 13, and a shaft linear vibratory feeder 15 mounted on the machine base 1 and in contact with the bottom surface of the shaft track 14. In practical applications, the shaft vibratory plate 13 transports the shafts to the shaft track 14 in an orderly manner. Under the action of the shaft linear vibratory feeder 15 and the gravity of the shafts, the heads of the shafts face upwards and move along the shaft track 14, so that the shafts are supplied one by one to the shaft transfer mechanism 11.

[0038] In this embodiment, the shaft transfer mechanism 11 includes a transfer frame 16 mounted on the machine base 1, a shaft receiving seat 17 movably disposed at the discharge end of the shaft feeding mechanism 10, a shaft receiving driver 18 mounted on the transfer frame 16 for driving the shaft receiving seat 17 closer to or away from the flipping feeding mechanism 12, a material support block 19 movably disposed at the discharge end of the shaft feeding mechanism 10 and disposed opposite to the shaft receiving seat 17, and a material support driver 20 mounted on the transfer frame 16 for driving the material support block 19 closer to or away from the shaft receiving seat 17. The shaft receiving seat 17 is provided with an open shaft receiving groove 21 for connecting with the discharge end of the shaft feeding mechanism 10, and the material support block 19 can extend into the open shaft receiving groove 21.

[0039] In practical applications, initially, the open shaft groove 21 connects to the discharge end of the shaft track 14, and the shaft track 14 supplies the shaft into the open shaft groove 21. At this time, the material support driver 20 drives the material support block 19 to move closer to the open shaft groove 21, so that the material support block 19 extends into the open shaft groove 21 and clamps the shaft in the open shaft groove 21. Then, the shaft drive 18 drives the shaft support seat 17 to move towards the direction of the flipping feeding mechanism 12, and the side wall of the shaft support seat 17 can block the discharge port of the shaft track 14 of the shaft feeding mechanism 10. At the same time, the material support driver 20 drives the material support block 19 to move towards the direction of the flipping feeding mechanism 12. The shaft support seat 17 and the material support block 19 clamp the shaft and move synchronously until the shaft moves to the flipping feeding mechanism 12. The flipping feeding end of the flipping feeding mechanism 12 picks up the shaft to realize the transfer of the shaft.

[0040] Specifically, the flipping and feeding mechanism 12 includes a flipping and feeding frame 22 mounted on the machine base 1, a flipping and feeding translation driver 23 mounted on the flipping and feeding frame 22, a flipping and feeding lifting driver 24 mounted on the output end of the flipping and feeding translation driver 23, a flipping driver 25 mounted on the lifting end of the flipping and feeding lifting driver 24, a clamping rod driver 26 mounted on the flipping end of the flipping driver 25, and two clamping rod blocks 27 respectively mounted on the two clamping ends of the clamping rod driver 26. The flipping driver 25 is used to drive the clamping rod driver 26 and the two clamping rod blocks 27 to rotate 180°, and the clamping rod driver 26 is used to drive the two clamping rod blocks 27 to move closer to or further away from each other. Preferably, the flipping driver 25 and the clamping rod driver 26 can be replaced by a rotary gripper cylinder 71.

[0041] In practical applications, the shaft transfer mechanism 11 moves the shaft between two shaft clamping blocks 27. The shaft clamping driver 26 drives the two shaft clamping blocks 27 to move closer to each other to clamp the shaft. Then, the flip-feeding translation driver 23 drives the flip-feeding lifting driver 24, along with the flip driver 25, the shaft clamping driver 26, the two shaft clamping blocks 27, and the shaft, to move above the corresponding carrier 3. At the same time, the flip driver 25 drives the shaft clamping driver 26, along with the two shaft clamping blocks 27, and the shaft to rotate 180°, so that the head of the shaft faces downward. Then, the flip-feeding lifting driver 24 drives the flip driver 25, along with the shaft clamping driver 26, the two shaft clamping blocks 27, and the shaft, to move downward until the shaft is placed on the carrier 3, thereby realizing the flipping and loading of the shaft.

[0042] In this embodiment, the bushing assembly 5 includes a bushing vibrating disc 28 mounted on the machine base 1, a bushing frame 29 mounted on the machine base 1, a base 30 mounted on the bushing frame 29, a support seat 31 mounted on the end of the base 30 away from the bushing frame 29, a pressing bushing driver 32 mounted on the support seat 31, a pressing rod 33 mounted on the driving end of the pressing bushing driver 32, a bushing receiving driver 34 mounted on the bushing frame 29, and a bushing receiving block 35 mounted on the driving end of the bushing receiving driver 34. A horizontal groove 36 is provided in the middle of the base 30, and the bushing receiving block 35 is slidably disposed in the groove 36. The bushing receiving block 35 has a connecting... The bushing hole 37, the top surface of one end of the seat 30 is recessed with a feed hole 38 that communicates with the slide groove 36, the other end of the seat 30 is recessed with a notch 39 that communicates with the slide groove 36, the pressing rod 33 is correspondingly arranged with the notch 39, the bottom wall of the slide groove 36 away from the feed hole 38 is provided with a discharge hole 40, the bushing hole 37 is used to connect with the feed hole 38 or the discharge hole 40, the feed hole 38 is connected to the discharge port of the bushing vibrating plate 28 through the material pipe 41, the pressing rod drive 32 is used to drive the pressing rod 33 to rise and fall, the bushing drive 34 is used to drive the bushing block 35 to move horizontally along the slide groove 36, the pressing rod 33 can pass through the bushing hole 37 and the discharge hole 40.

[0043] In practical applications, the carrier 3 rotates to the bottom of the bushing assembly 5. The shaft on the carrier 3 is coaxial with the discharge hole 40. The bushing vibrating plate 28 conveys the bushings into the material tube 41 in an orderly manner. The bushings in the material tube 41 enter the feed hole 38 one by one. At this time, the bushing hole 37 of the bushing block 35 is connected to the feed hole 38. The bushings in the feed hole 38 fall into the bushing hole 37. Then, the bushing driver 34 drives the bushing block 35 and the bushings to move along the slide groove 36 until the bushing hole 37 of the bushing block 35 is connected to the discharge hole 40. The pressing rod 33 is coaxial with the bushing hole 37. Then, the pressing assembly driver 32 drives the pressing rod 33 to move down. The moving pressing rod 33 inserts into the bushing hole 37 and the discharge hole 40 and presses the bushing down to assemble it on the shaft, so that the bushing is fitted outside the shaft.

[0044] Specifically, the pressing rod 33 is provided with a central hole 42 in the axial direction, which allows the shaft part to be inserted; when the pressing rod 33 presses the bushing down to assemble it onto the shaft part, as the pressing rod 33 moves down, the shaft part is inserted into the central hole 42 of the pressing rod 33, so that the pressing rod 33 can assemble the bushing into place.

[0045] In this embodiment, the bushing assembly 5 further includes a first support shaft mechanism 43 installed on the bushing frame 29 and located below the seat 30, and a first shaft sensor 44 disposed on the main body of the first support shaft mechanism 43. The first shaft sensor 44 is electrically connected to the pressing bushing driver 32.

[0046] As the carrier 3 rotates to a position below the bushing assembly 5, the first axle support mechanism 43 clamps and supports the shaft portion carried by the carrier 3, ensuring the positional accuracy and stability of the shaft. After the first axle support mechanism 43 straightens the shaft, the first axle sensor 44 senses the shaft and presses down on the bushing driver 32 to provide feedback. This causes the lowering bushing driver 32 to drive the lowering rod 33 downward, thereby pressing the bushing onto the shaft portion. This structural design ensures that the shaft portion is straightened before bushing assembly, improving the quality of shaft-shoulder assembly and significantly increasing the assembly yield.

[0047] Specifically, the first support shaft mechanism 43 includes a clamping driver 45 mounted on the bushing bracket 29 and two clamping members 46 respectively mounted on the two output ends of the clamping driver 45. The clamping driver 45 is used to drive the two clamping members 46 to move closer or further away from each other. The clamping ends of the two clamping members 46 are recessed on the side where they are close to each other, and a clamping groove 47 is provided. The thickness of the clamping end of one clamping member 46 is greater than the thickness of the clamping end of the other clamping member 46. A receiving groove 48 is recessed in the middle of the clamping end of the thicker clamping member 46. The receiving groove 48 is used for the clamping end of the thinner clamping member 46 to extend into. The receiving groove 48 is recessed from the side wall of the clamping groove 47 of the clamping end of the thicker clamping member 46 to divide the clamping groove 47 into two.

[0048] In practical applications, when the shaft portion carried by the carrier 3 is located between the two clamping members 46, the clamping driver 45 drives the two clamping members 46 to move closer to each other, so that the two clamping members 46 clamp the shaft portion, and the shaft portion is clamped in the clamping grooves 47 of the two clamping members 46; when the clamping ends of the two clamping members 46 clamp the shaft portion, the clamping end of one clamping member 46 extends into the receiving groove 48 of the clamping end of the other clamping member 46, so that the clamping grooves 47 of the two clamping members 46 clamp the shaft portion. At this time, since the clamping groove 47 of the thicker clamping member 46 is divided into two, the two clamping members 46 form a three-point positioning clamping method when clamping the shaft portion, which improves the stability of clamping the shaft portion and can correct the shaft portion.

[0049] In this embodiment, the flattening device 6 includes a flattening frame 49, a flattening lifting seat 50 that is slidably connected to the flattening frame 49, a flattening lifting drive mechanism 51 that is mounted on the flattening frame 49 and used to drive the flattening lifting seat 50 to rise and fall, a flattening lifting block 52 that is slidably connected to the flattening lifting seat 50, a flattening lifting driver 53 that is mounted on the flattening lifting seat 50 and used to drive the flattening lifting block 52 to rise and fall, a flattening assembly 54 disposed below the flattening lifting block 52, and a second support shaft mechanism 55 disposed at the bottom of the flattening lifting seat 50 and located below the flattening assembly 54. The flattening assembly 54 includes a fixed seat 56, an elastic tension member 57, an elastic member 58, two symmetrically arranged swing arms 59, and two symmetrically arranged sliding arms 58. The block 95 and two symmetrically arranged pressing knives 60 are provided. Two driving inclined surfaces 61 are symmetrically arranged on both sides of the bottom of the flattening lifting block 52. Rotating cavities 62 are provided on both sides of the fixed base 56. The two rotating cavities 62 are respectively arranged in a one-to-one correspondence with the two swing arms 59. The middle part of the swing arm 59 is rotatably connected to the two opposite side walls of the rotating cavity 62. The upper middle part of the two swing arms 59 is elastically connected via elastic pull member 57. The top of the two swing arms 59 respectively abuts against the two driving inclined surfaces 61. Two sliders 95 are horizontally slidably connected to the bottom of the fixed base 56. The two sliders 95 are located between the bottom ends of the two swing arms 59. The bottom ends of the two swing arms 59 are used to abut against the two sliders 95 respectively. Two pressing knives 60 are respectively installed on the two sliders 95. Elastic member 58 is clamped between the two sliders 95.

[0050] In practical applications, initially, the elastic element 58 is in an extended state, applying a force that pushes the two sliders 95 away from each other, ensuring that the sliders 95 are always in contact with the bottom end of the swing arm 59. The elastic tension element 57 applies a force that pulls the two swing arms 59 closer together, ensuring that the top end of the swing arm 59 is always in contact with the driving inclined surface 61, and the bottom ends of the two swing arms 59 are in an open state. When the shaft carried by the carrier 3 is below the flattening device 6, the flattening lifting drive mechanism 51 drives the flattening lifting seat 50. The flattening assembly 54 descends until the top of the shaft is between the bottom ends of the two swing arms 59 of the flattening assembly 54, i.e., the top of the shaft is between the two pressing knives 60. Simultaneously, the second shaft support mechanism 55 supports the middle position of the shaft to ensure its stability and positional accuracy. Then, the flattening lifting driver 53 drives the flattening lifting block 52 to descend. The two driving ramps 61 of the descending flattening lifting block 52 respectively abut against the tops of the two swing arms 59. As 52 descends, the distance between the two drive ramps 61 gradually increases due to their inverted V-shape arrangement. This drives the tops of the two swing arms 59 to move away from each other, causing them to swing. The bottoms of the swinging arms 59 then move closer together, contacting the two sliders 95, which in turn brings the two pressure knives 60 closer together. These pressure knives apply pressure to the top of the shaft, forming a flat section at the top. Finally, the flattened section is lifted by the lifting driver 53. The flattening lifting block 52 rises and resets. As the flattening lifting block 52 rises, the elastic force of the elastic pull member 57 drives the top ends of the two swing arms 59 to move closer to each other and reset. The elastic force of the elastic member 58 drives the two sliders 95 to move away from each other and reset, causing the two pressing knives 60 to release the shaft. The second shaft support mechanism 55 releases the shaft. Then, the flattening lifting drive mechanism 51 drives the flattening lifting seat 50, along with the flattening lifting block 52 and the flattening assembly 54, to rise and reset as a whole, so as to facilitate the flattening forming of the next shaft. This flattening device 6 can stably and reliably process and form flat sections on both sides of the top end of the shaft, and the flattening forming efficiency is high.

[0051] Specifically, a rotating block 63 is rotatably connected to the top of the swing arm 59. The rotating block 63 rolls against the drive inclined surface 61. The rotating block 63 can be a wheel, a ball, or a bearing. During the lifting and lowering process of the flattening lifting block 52, the rolling contact between the rotating block 63 and the drive inclined surface 61 reduces frictional resistance and wear, thus extending the service life of the flattening lifting block 52 and the swing arm 59.

[0052] Specifically, the bottom surface of the fixed base 56 is recessed with a sliding cavity, and the two sliders 95 are slidably disposed within the sliding cavity, making the structure of the fixed base 56 and the sliders 95 compact. The rotating cavity 62 is connected to the sliding cavity, and the bottom end of the swing arm 59 can extend into the sliding cavity. Guide rods are horizontally installed on the two opposite side walls of the sliding cavity, and the two sliders 95 slide through the guide rods. As the sliders 95 move closer or further apart, the guide rods guide the sliders 95, improving the movement stability of the sliders 95.

[0053] Specifically, the elastic tension member 57 can be a tension spring, and the elastic member 58 can be a spring. The spring is sleeved outside the guide rod, and the guide rod plays a guiding and positioning role for the spring, which improves the working stability of the spring and facilitates the disassembly and assembly of the spring.

[0054] In this embodiment, the spinning assembly joint device 7 includes a joint supply mechanism 64 mounted on the machine base 1, a joint seat 65 mounted on the discharge end of the joint supply mechanism 64, a lifting mechanism 66 mounted on the machine base 1 for lifting the joint received by the joint seat 65, a third support shaft mechanism 67 disposed on one side of the joint seat 65 and located on the periphery of the turntable 2, a loading and unloading robot 68 mounted on the machine base 1, and a picking spinning assembly mechanism 69 disposed on the output end of the loading and unloading robot 68. The picking spinning assembly mechanism 69 is movably disposed above the joint seat 65 and the carrier 3.

[0055] In practical applications, when the shaft carried by the carrier 3 rotates to the spinning assembly joint device 7, the third shaft support mechanism 67 supports the shaft carried by the carrier 3. At the same time, the joint supply mechanism 64 supplies the joint to the joint seat 65, the lifting mechanism 66 lifts the joint on the joint seat 65, and the loading and unloading robot 68 drives the picking spinning assembly mechanism 69 to move above the joint seat 65 and pick up the joint. Then, the picking spinning assembly mechanism 69 moves the joint to the top of the shaft. The picking spinning assembly mechanism 69 spins the joint onto the flat part at the top of the shaft to achieve automated spinning assembly of the joint.

[0056] In this embodiment, the picking and spinning assembly mechanism 69 includes a pressing driver 70 installed at the output end of the loading and unloading robot 68 and a rotary gripper cylinder 71 installed at the pressing end of the pressing driver 70. The rotating part of the rotary gripper cylinder 71 is equipped with a fixing ring 72, and the fixing ring 72 is provided with a pressure block 73. The pressure block 73 is located in the space formed by the two grippers of the rotary gripper cylinder 71.

[0057] In practical applications, the loading / unloading robot 68 drives the picking and spinning assembly mechanism 69 to move above the connector seat 65. At this time, the top surface of the connector abuts against the pressure block 73, and the connector is located between the two jaws of the rotary gripper cylinder 71. Then, the two jaws of the rotary gripper cylinder 71 converge and clamp the connector. Then, the loading / unloading robot 68 drives the picking and spinning assembly mechanism 69 to move the connector above the top of the shaft. The pressing drive 70 drives the rotary gripper cylinder 71 to move the connector downward. At the same time, the rotating jaw end of the rotary gripper cylinder 71 drives the fixing ring 72 and the two jaws to rotate synchronously to spin-assemble the connector on the flat part at the top of the shaft. By assembling the connector by spinning, the connector can be assembled smoothly and stably, making the assembly of the connector easier.

[0058] Specifically, the connector feeding mechanism 64 includes a connector feeding vibratory plate 74 mounted on the machine base 1, a connector rail 75 connected to the discharge port of the connector feeding vibratory plate 74, and a connector linear vibratory feeder 76 mounted on the machine base 1 and in contact with the bottom surface of the connector rail 75; the connector seat 65 is provided with a connector groove 77 communicating with the discharge port of the connector rail 75; the lifting mechanism 66 includes a lifting cylinder mounted on the machine base 1 and a lifting rod mounted on the piston rod of the lifting cylinder; the lifting rod is correspondingly arranged with the connector groove 77; the lifting rod is located below the connector groove 77; and the lifting cylinder can drive the lifting rod to extend into the connector groove 77.

[0059] In practical applications, the connector vibrating plate 74 orderly transports the connectors to the connector track 75. Under the action of the connector linear vibrating feeder 76, the connectors move along the connector track 75. The connectors in the connector track 75 move one by one into the connector slot 77. When there is a connector in the connector slot 77, the lifting cylinder drives the lifting rod to rise. The rising lifting rod lifts the connector so that the spinning assembly mechanism 69 can pick up the connector.

[0060] In this embodiment, the fixed-length assembly joint device 8 includes a fixed-length assembly frame 78 mounted on the machine base 1, a support plate 79 disposed in the middle of the fixed-length assembly frame 78, a fixed-length assembly bottom mold 80 mounted on the support plate 79, a feeding track 81 mounted on the fixed-length assembly frame 78 or the machine base 1 and located on one side of the support plate 79, a fixed-length assembly driver 82 mounted on the top of the fixed-length assembly frame 78, a fixed-length assembly pressure head 83 mounted on the drive end of the fixed-length assembly driver 82 and correspondingly disposed with the fixed-length assembly bottom mold 80, a feeding driver 84 mounted on the support plate 79, and a feeding driver 84 mounted on the drive end of the feeding driver 84. The clamping driver 85 and two clamping blocks 86 respectively installed at the two clamping ends of the clamping driver 85 are used to drive the two clamping blocks 86 to move closer or further away from each other. The unloading driver 84 is used to drive the clamping driver 85 and the two clamping blocks 86 to move back and forth between the fixed-length assembly bottom mold 80 and the unloading track 81. An opening clearance groove 87 is provided in the middle of the two clamping blocks 86. The opening clearance groove 87 is used for the loading end of the fixed-length assembly loading device 9 to move in or out. The fixed-length assembly driver 82 is used to drive the fixed-length assembly pressure head 83 to move closer or further away from the fixed-length assembly bottom mold 80.

[0061] In practical applications, when the spun-assembled shaft with a joint carried by the carrier 3 rotates to the fixed-length assembly joint device 8, the fixed-length assembly feeding device 9 picks up the middle position of the shaft with the joint, the feeding end of the fixed-length assembly feeding device 9 moves into the opening relief groove 87, and moves the spun-assembled shaft with the joint between the two clamping blocks 86, with the fixed-length assembly bottom mold 80 located below the head of the shaft and abutting against the head of the shaft. Then, the clamping driver 85 drives the two clamping blocks 86 to move closer to each other, so that the two clamping blocks 86 clamp and support the shaft. Then, the fixed-length assembly driver 82 drives the fixed-length assembly pressure head 83. The fixed-length assembly head 83 lowers a preset distance, pressing the connector down onto the preset position on the shaft to ensure the positional accuracy and stability of the connector on the shaft. After the connector is assembled to a fixed length, the electric toothbrush shaft is formed. The feeding end of the fixed-length assembly feeding device 9 moves out of the opening clearance groove 87. The unloading driver 84 drives the clamping driver 85 to move the electric toothbrush shaft horizontally to below the unloading track 81. Finally, the clamping driver 45 drives the two clamping blocks 86 to move away from each other to release the electric toothbrush shaft, causing the electric toothbrush shaft to fall onto the unloading track 81, thus realizing the unloading and output of the electric toothbrush shaft.

[0062] Specifically, the clamping block 86 is provided with a support joint groove 88 and a support shaft rod groove 89 from top to bottom. The support joint groove 88 and the support shaft rod groove 89 are coaxially arranged and are located on the upper and lower sides of the opening clearance groove 87, respectively.

[0063] In practical applications, when the two clamping blocks 86 clamp the support shaft, the middle position of the shaft is clamped in the support shaft groove 89, and the spin-assembled joint is located in the support joint groove 88. When the fixed-length assembly press head 83 presses down on the joint, the joint can move downward relative to the support joint groove 88 to be assembled in place.

[0064] Specifically, the fixed-length assembly base mold 80 is arranged in a stepped manner from top to bottom with multiple steps 90. There are multiple support joint grooves 88 and multiple support shaft grooves 89, with each step 90, support joint groove 88, and support shaft groove 89 corresponding to the others. Based on the different length specifications of the shafts, the fixed-length assembly feeding device 9 picks up the shafts and places them onto the steps 90 at different positions, so that one machine can assemble and produce electric toothbrush shafts of various length specifications.

[0065] In this embodiment, the electric toothbrush shaft assembly machine also includes a second shaft sensor 91 installed on the machine base 1 and located between the shaft feeding device 4 and the bushing assembly 5, a bushing sensor 92 installed on the machine base 1 and located between the bushing assembly 5 and the flattening device 6, and a fourth shaft support mechanism 93 installed on the machine base 1 and located between the spinning assembly joint device 7 and the fixed-length assembly joint device 8. The main body of the fourth shaft support mechanism 93 is equipped with a joint sensor 94. The second shaft sensor 91, the bushing sensor 92 and the fourth shaft support mechanism 93 are all distributed around the turntable 2.

[0066] In practical applications, the second shaft sensor 91 senses the shaft. When the second shaft sensor 91 detects the shaft, it proves that the shaft feeding device 4 has successfully fed the shaft, meaning that the carrier 3 is carrying the shaft. When the second shaft sensor 91 does not detect the shaft, it proves that the shaft feeding device 4 has failed to feed the shaft. At this time, the second shaft sensor 91 sends a signal to the machine's control system, causing the machine to alarm and reminding the operator to perform machine maintenance.

[0067] The bushing sensor 92 senses the bushing on the shaft. When the bushing sensor 92 senses the bushing, it proves that the bushing assembly is successful. When the bushing sensor 92 does not detect the bushing, it proves that the bushing assembly has failed. At this time, the bushing sensor 92 sends a signal to the machine's control system, causing the machine to alarm and reminding the staff to perform maintenance on the machine.

[0068] When the shaft moves to the fourth support shaft mechanism 93, the fourth support shaft mechanism 93 supports the shaft. The joint sensor 94 senses the joint on the shaft. When the joint sensor 94 senses the joint, it proves that the spinning assembly of the joint is successful. When the joint sensor 94 does not detect the joint, it proves that the spinning assembly of the joint has failed. At this time, the joint sensor 94 sends a signal to the machine's control system, causing the machine to alarm and reminding the staff to maintain the machine.

[0069] Specifically, the structures of the second support shaft mechanism 55, the third support shaft mechanism 67, and the fourth support shaft mechanism 93 are all the same as the structure of the first support shaft mechanism 43.

[0070] The present invention also provides a method for assembling an electric toothbrush shaft, based on the application of the above-mentioned electric toothbrush shaft assembly machine, comprising the following methods:

[0071] The rotary drive mechanism drives the turntable 2 to rotate intermittently along with multiple carriers 3. Each carrier 3 rotates sequentially to a position below the shaft feeding device 4, the bushing fitting device 5, the flattening device 6, the spinning assembly joint device 7, and the fixed-length assembly joint device 8. The shaft feeding device 4 feeds the shaft onto the carrier 3. The bushing fitting device 5 fits the bushing onto the shaft carried by the carrier 3. The flattening device 6 flattens the top of the shaft with the bushing fitted with the bushing to form a flat position. The spinning assembly joint device 7 spins and assembles the joint at the flat position of the shaft. The fixed-length assembly joint device 8 assembles the joint spun and assembled at the flat position of the shaft to a fixed length onto the shaft. This ensures that the joints are accurately assembled to the target position on the shaft, guaranteeing that the joints are aligned on the shaft, thus completing the assembly of the electric toothbrush shaft core.

[0072] All technical features in this embodiment can be freely combined according to actual needs.

[0073] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

Claims

1. An electric toothbrush shaft assembly machine, characterized in that: The utility model provides a kind of equipment for the assembly of shaft sleeve, including machine table (1), the rotary drive mechanism of being installed in machine table (1), rotary disc (2) of being installed in the rotary end of rotary drive mechanism, multiple carriers (3) of being installed in the ring array of rotary disc (2) and respectively being installed in machine table (1) and sequentially distributing in the circumferential side of rotary disc (2) shaft rod feeding device (4), sleeve sleeve device (5), flatten position device (6), spinning assembly joint device (7) and fixed length assembly joint device (8), machine table (1) is installed with fixed length assembly feeding device (9), shaft rod feeding device (4) is used to feed shaft rod to carrier (3), sleeve sleeve device (5) is used to sleeve sleeve on shaft rod, flatten position device (6) is used to press and form flatten position at the top end of shaft rod, spinning assembly joint device (7) is used to spin and assemble joint at the flatten position of shaft rod, fixed length assembly joint device (8) is used to fixed length assembly joint on shaft rod, fixed length assembly feeding device (9) is used to transfer the shaft rod of being assembled with joint carried by carrier (3) to fixed length assembly joint device (8);Flatten position device (6) includes flatten position frame (49), flatten position lifting seat (50) of being slidably connected to flatten position frame (49), flatten position lifting driving mechanism (51) of being installed in flatten position frame (49) and being used to drive flatten position lifting seat (50) lifting, flatten position lifting block (52) of being slidably connected to flatten position lifting seat (50), flatten position lifting driver (53) of being installed in flatten position lifting seat (50) and being used to drive flatten position lifting block (52) lifting, flatten position assembly (54) being arranged below flatten position lifting block (52) and second shaft rod supporting mechanism (55) being installed in the bottom of flatten position lifting seat (50) and being arranged below flatten position assembly (54), flatten position assembly (54) includes fixed seat (56), elastic puller (57), elastic member (58), two symmetrical swing arms (59), two symmetrical sliders (95) and two symmetrical pressure knives (60), two driving inclined surfaces (61) are symmetrically arranged on the bottom of flatten position lifting block (52), two rotating cavities (62) are symmetrically arranged on the two sides of fixed seat (56), two rotating cavities (62) are one-to-one corresponding with two swing arms (59), the middle of swing arm (59) is rotatably connected with the two opposite side walls of rotating cavity (62), the middle upper portion of two swing arms (59) is elastically connected via elastic puller (57), the top of two swing arms (59) is respectively in contact with two driving inclined surfaces (61), two sliders (95) are horizontally slidably connected to the bottom of fixed seat (56), two sliders (95) are located between the bottom of two swing arms (59), the bottom of two swing arms (59) is used for being respectively in contact with two sliders (95), two pressure knives (60) are respectively installed in two sliders (95), elastic member (58) is clamped between two sliders (95). The spinning assembly joint device (7) comprises a joint mechanism (64) arranged on the machine table (1), a joint seat (65) arranged at the discharge end of the joint mechanism (64), a lifting mechanism (66) arranged on the machine table (1) and used for lifting the joint received by the joint seat (65), a third supporting shaft mechanism (67) arranged on one side of the joint seat (65) and located on the periphery of the rotating disc (2), an up-down feeding manipulator (68) arranged on the machine table (1), and a picking spinning assembly mechanism (69) arranged at the output end of the up-down feeding manipulator (68), wherein the picking spinning assembly mechanism (69) is movably arranged above the joint seat (65) and the carrier (3).

2. The electric toothbrush shaft core assembling machine according to claim 1, characterized in that: The shaft rod feeding device (4) comprises a shaft rod feeding mechanism (10), a shaft rod transfer mechanism (11) arranged at the discharge end of the shaft rod feeding mechanism (10), and a turnover feeding mechanism (12) arranged correspondingly with the shaft rod transfer mechanism (11), wherein the shaft rod feeding mechanism (10) is used for supplying shaft rods to the shaft rod transfer mechanism (11), the shaft rod transfer mechanism (11) is used for transferring the shaft rods to the turnover feeding mechanism (12), and the turnover feeding mechanism (12) is used for feeding the shaft rods after 180° turnover to the carrier (3).

3. The electric toothbrush shaft core assembling machine according to claim 2, characterized in that: The shaft rod transfer mechanism (11) comprises a transfer frame (16) arranged on the machine table (1), an interface shaft rod seat (17) movably arranged at the discharge end of the shaft rod feeding mechanism (10), an interface shaft rod driver (18) arranged on the transfer frame (16) and used for driving the interface shaft rod seat (17) to approach or move away from the turnover feeding mechanism (12), a supporting block (19) movably arranged at the discharge end of the shaft rod feeding mechanism (10) and arranged opposite to the interface shaft rod seat (17), and a supporting block driver (20) arranged on the transfer frame (16) and used for driving the supporting block (19) to approach or move away from the interface shaft rod seat (17), wherein the interface shaft rod seat (17) is provided with an open interface shaft rod groove (21) used for connecting the discharge end of the shaft rod feeding mechanism (10), and the supporting block (19) can extend into the open interface shaft rod groove (21).

4. The electric toothbrush shaft core assembling machine according to claim 1, characterized in that: The sleeve assembly device (5) comprises a sleeve vibration disc (28) arranged on the machine table (1), a sleeve assembly frame (29) arranged on the machine table (1), a seat body (30) arranged on the sleeve assembly frame (29), a supporting seat (31) arranged at one end of the seat body (30) away from the sleeve assembly frame (29), a pressing sleeve driver (32) arranged on the supporting seat (31), a pressing rod (33) arranged at the driving end of the pressing sleeve driver (32), a sleeve connecting driver (34) arranged on the sleeve assembly frame (29), and a sleeve connecting block (35) arranged at the driving end of the sleeve connecting driver (34). The middle part of the seat body (30) is horizontally provided with a sliding groove (36), the sleeve connecting block (35) is slidingly arranged in the sliding groove (36), the sleeve connecting block (35) is provided with a sleeve connecting hole (37), one end of the seat body (30) is concavely provided with a feeding hole (38) in communication with the sliding groove (36), the other end of the seat body (30) is concavely provided with a notch (39) in communication with the sliding groove (36), the pressing rod (33) is correspondingly arranged with the notch (39), the bottom wall of the sliding groove (36) away from the feeding hole (38) is provided with a discharging hole (40), the sleeve connecting hole (37) is used for connecting the feeding hole (38) or the discharging hole (40), the feeding hole (38) is communicated with the discharging port of the sleeve vibration disc (28) through a pipe (41), the pressing sleeve driver (32) is used for driving the pressing rod (33) to ascend and descend, the sleeve connecting driver (34) is used for driving the sleeve connecting block (35) to move horizontally along the sliding groove (36), and the pressing rod (33) can penetrate through the sleeve connecting hole (37) and the discharging hole (40).

5. The electric toothbrush shaft core assembling machine according to claim 4, characterized in that: The sleeve assembly device (5) further comprises a first shaft supporting rod mechanism (43) arranged on the sleeve assembly frame (29) and located below the seat body (30), and a first shaft rod sensor (44) arranged on the main body of the first shaft supporting rod mechanism (43), the first shaft rod sensor (44) is electrically connected with the pressing sleeve driver (32).

6. The electric toothbrush shaft core assembling machine according to claim 1, characterized in that: The pickup spinning assembly mechanism (69) comprises a pressing driver (70) arranged on the output end of the feeding and discharging manipulator (68), and a rotary jaw cylinder (71) arranged at the pressing end of the pressing driver (70), the rotary part of the rotary jaw cylinder (71) is arranged with a fixing ring (72), the fixing ring (72) is provided with a pressing block (73), and the pressing block (73) is located in the space formed by the two jaws of the rotary jaw cylinder (71).

7. The electric toothbrush shaft core assembling machine according to claim 1, characterized in that: The fixed-length assembly joint device (8) comprises a fixed-length assembly rack (78) arranged on the machine table (1), a support plate (79) arranged at the middle of the fixed-length assembly rack (78), a fixed-length assembly bottom die (80) arranged on the support plate (79), a feeding rail (81) arranged on the fixed-length assembly rack (78) or the machine table (1) and located at one side of the support plate (79), a fixed-length assembly driver (82) arranged at the top of the fixed-length assembly rack (78), a fixed-length assembly pressing head (83) arranged at the driving end of the fixed-length assembly driver (82) and corresponding to the fixed-length assembly bottom die (80), a feeding driver (84) arranged on the support plate (79), a clamping driver (85) arranged at the driving end of the feeding driver (84), and two clamping blocks (86) respectively arranged at the two clamping ends of the clamping driver (85), the clamping driver (85) is used for driving the two clamping blocks (86) to move close to or away from each other, the feeding driver (84) is used for driving the clamping driver (85) and the two clamping blocks (86) to move reciprocatingly between the fixed-length assembly bottom die (80) and the feeding rail (81), the middle of the two clamping blocks (86) is provided with an opening avoiding groove (87) for the feeding end of the fixed-length assembly feeding device (9) to move in or out, and the fixed-length assembly driver (82) is used for driving the fixed-length assembly pressing head (83) to move close to or away from the fixed-length assembly bottom die (80).

8. A method of assembling an electric toothbrush shaft core, the method comprising: Based on the application of the electric toothbrush shaft core assembly machine according to any one of claims 1 to 7, the method comprises the following steps: ​ The rotating driving mechanism drives the rotating disc (2) and the plurality of carriers (3) to rotate intermittently, so that each carrier (3) is sequentially rotated to the lower side of the shaft rod feeding device (4), the sleeving sleeve device (5), the flattening position device (6), the spinning assembly joint device (7) and the fixed-length assembly joint device (8), the shaft rod feeding device (4) feeds the shaft rod to the carrier (3), the sleeving sleeve device (5) sleeves the sleeve on the shaft rod carried by the carrier (3), the flattening position device (6) flattens and forms the flattening position at the top of the shaft rod sleeved with the sleeve, the spinning assembly joint device (7) spins and assembles the joint at the flattening position of the shaft rod, and the fixed-length assembly joint device (8) fixedly assembles the joint spun and assembled at the flattening position of the shaft rod on the shaft rod, so that the joint can be accurately fixedly assembled at the target position of the shaft rod, the position of the joint assembled on the shaft rod is consistent, and the electric toothbrush shaft core assembly is completed.

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