CN115338627B

CN115338627B - Automatic assembly machine

Info

Publication number: CN115338627B
Application number: CN202110518238.3A
Authority: CN
Inventors: 颜宏
Original assignee: Xiamen Conjoin Electronics Technology Co ltd
Current assignee: Xiamen Conjoin Electronics Technology Co ltd
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2025-01-28
Anticipated expiration: 2041-05-12
Also published as: CN115338627A

Abstract

The present invention relates to an automatic assembly machine for automatically assembling a motor assembly in a micro air pump. The motor assembly comprises a motor, an optional stainless steel sheet, a plastic base, an eccentric wheel and steel balls. The automatic assembly machine simultaneously solves the problems of stable feeding of the stainless steel sheet, stable feeding of the plastic base, distribution of the steel balls, detection of the steel balls, etc., and cooperates with a conveying mechanism to realize the full-automatic assembly of the motor assembly in the micro air pump, thereby greatly improving the production efficiency of the product, improving the yield rate and reducing the production cost of the factory.

Description

Automatic assembly machine

Technical Field

The invention relates to the field of automatic assembling devices, in particular to an automatic assembling machine of a miniature air pump.

Background

The miniature air pump is a gas conveying device which has small volume and gaseous working medium and is mainly used for various purposes such as gas sampling, gas circulation, vacuum adsorption, vacuum pressure maintaining, air extraction, air inflation, pressurization and the like. Conventional miniature air pumps typically include a motor, a stainless steel plate clamped between the motor and the plastic base, a plastic base on which the stainless steel plate is mounted, an eccentric mounted on the plastic base, and steel balls plunged into the eccentric (for convenience, the assembly of these several parts together is referred to as a motor assembly). However, these several parts are difficult to assemble together automatically, mainly because:

1. The stainless steel sheet and the plastic base are required to have a certain position and angle when being installed, if the stainless steel sheet or the plastic base is assembled on a motor by adopting a clamping jaw (or a mechanical arm), the stainless steel sheet or the plastic base is required to be conveyed to a position to be assembled in a stable state, and if a common automatic conveying device such as a vibrating disc, a conveying belt and the like is adopted for conveying, the position and the angle of the stainless steel sheet and the plastic base cannot be ensured not to be changed in the conveying process due to insufficient constraint on the stainless steel sheet and the plastic base;

2. The steel balls are usually stored in steel ball bottles, the steel balls have certain magnetism, oil stains are easy to adhere to the steel balls in the transmission process, and the steel balls are easy to adhere together, so that the steel balls are difficult to be transmitted in an automatic transmission mode.

Therefore, in the prior art, the miniature air pump produced by the manual assembly mode of workers is low in production efficiency, and is difficult to meet the production requirements of factories, and on the other hand, the yield of products is low and the defective product outflow rate is high due to manual assembly.

Disclosure of Invention

Therefore, in view of the above problems, the present invention provides an automatic assembling machine to fully automatically assemble the motor assembly in the micro air pump, thereby improving the production efficiency and the product yield.

The invention is realized by adopting the following technical scheme:

The invention provides an automatic assembling machine, which is used for automatically assembling a motor component in a miniature air pump, and the motor component at least comprises a motor, a plastic base, an eccentric wheel and steel balls, and is characterized by comprising a clamping seat, a plastic base mounting unit, an automatic screw locking machine and an eccentric wheel mounting unit, wherein the motor is clamped and fixed on the clamping seat, the plastic base mounting unit is used for conveying the plastic base and mounting the plastic base on the motor, the automatic screw locking machine is used for fixing the plastic base and the motor screw lock, the eccentric wheel mounting unit comprises an eccentric wheel conveying device, a steel ball distributing device and an eccentric wheel assembling mechanism, the eccentric wheel conveying device is used for conveying the eccentric wheel, the steel ball distributing device is arranged above the eccentric wheel conveying device, the steel ball distributing device is used for separating out single steel balls and throwing the steel balls into the eccentric wheel to be assembled, and the eccentric wheel assembling mechanism is used for picking up the eccentric wheel and assembling the eccentric wheel on the plastic base.

Preferably, the motor assembly further comprises a stainless steel sheet, the automatic assembling machine further comprises a stainless steel sheet mounting unit which conveys the stainless steel sheet and places the stainless steel sheet on the motor, the plastic base is stacked on the stainless steel sheet again, and the plastic base and the motor screw lock are fixed through the automatic screw locking machine, so that the stainless steel sheet is pressed and fixed between the plastic base and the motor screw lock.

Preferably, the automatic assembling machine further comprises a rotary table, the clamping seat is fixedly arranged on the rotary table, the stainless steel sheet mounting unit, the plastic base mounting unit and the automatic screw locking machine are sequentially arranged around the rotary table, and the rotary table sequentially conveys the clamping seat to the stainless steel sheet mounting unit, the plastic base mounting unit and the automatic screw locking machine through rotation of the rotary table so as to respectively execute the mounting of the stainless steel sheet, the mounting of the plastic base and the screw locking fixation of the plastic base and the motor.

Preferably, the automatic assembling machine further comprises a first gripper jaw and a first conveyor belt, the first gripper jaw clamps the plastic base and the motor fixed together onto the first conveyor belt, and the plastic base and the motor are conveyed in a vertical state on the first conveyor belt to a position of the eccentric wheel mounting unit to mount the eccentric wheel.

Preferably, the automatic assembling machine further comprises a second clamping jaw, a third clamping jaw and a second conveying belt, the second clamping jaw clamps the assembled motor assembly onto the third clamping jaw, and the third clamping jaw swings to place the motor assembly on the second conveying belt in a lying posture to be conveyed out of the automatic assembling machine.

Preferably, the automatic assembling machine further includes a fool-proof detecting unit that detects whether the motor is properly mounted on the holder, and feeds back a detection signal to control whether the motor is to be subsequently assembled.

Preferably, the stainless steel sheet mounting unit comprises a stainless steel sheet conveying platform and a stainless steel sheet clamping jaw, wherein the stainless steel sheet is linearly conveyed on the stainless steel sheet conveying platform, a first guide groove and a second guide groove which linearly extend towards the same direction are formed in the stainless steel sheet conveying platform, the stainless steel sheet comprises a circular sheet-shaped first main body, a first lug part and a second lug part which are used as a fixing support of the miniature air pump, the first lug part and the second lug part are symmetrically integrally connected at two ends of the first main body, the first lug part and the second lug part are respectively inserted and matched in the first guide groove and the second guide groove, the first guide groove and the second guide groove limit the stainless steel sheet to be conveyed along the extending directions of the first guide groove and the second guide groove in a non-deflecting mode, and the stainless steel sheet clamping jaw is arranged at a conveying outlet of the stainless steel sheet conveying platform and used for clamping the stainless steel sheet and placing the stainless steel sheet on the motor.

Preferably, the plastic base mounting unit comprises a plastic base conveying platform and plastic base clamping jaws, the plastic base is linearly conveyed on the plastic base conveying platform, a third guide groove and a fourth guide groove which linearly extend towards the same direction are formed in the plastic base conveying platform, the plastic base comprises a cylindrical second main body, a first protruding column used for mounting and positioning between the plastic base and a motor and a second protruding column used for placing screws to lock and fix the plastic base and the motor, the first protruding column and the second protruding column are respectively arranged on two end faces of the second main body, the first protruding column and the second protruding column are respectively inserted and matched in the fourth guide groove and the third guide groove, so that the third guide groove and the fourth guide groove limit the plastic base to be conveyed along the extending direction of the third guide groove and the fourth guide groove in a non-deflecting mode, the plastic base is arranged at a conveying outlet of the plastic base conveying platform, the plastic base clamping jaws grasp the plastic base and place the plastic base on the two end faces of the second main body, the plastic clamping jaws are placed on the plastic base through the rotating mechanism, and the plastic clamping jaws are placed on the rotating base clamping jaws.

Preferably, the steel ball distributing device comprises a storage container for storing a plurality of steel balls, the lower end of the storage container in the gravity direction is provided with a first conveying channel which extends downwards, the caliber of the first conveying channel is slightly larger than the outer diameter of the steel balls, so that the steel balls are stacked and arranged in the first conveying channel from top to bottom along the gravity direction, a slideway is arranged at the outlet of the first conveying channel, a distributing slide block sliding and connected with a distributing hole for containing the single steel balls back and forth along the slideway is arranged on the outlet of the first conveying channel, the distributing slide block slides to enable the distributing hole to be aligned with the outlet of the lower end of the first conveying channel, the single steel balls fall in the distributing hole, the distributing slide block pushes the single steel balls to move in the slideway, a blanking hole is arranged on the slideway, the lower end of the blanking hole is connected with a second conveying channel which extends downwards, and the single steel balls enter the second conveying channel from the blanking hole to be conveyed downwards under the pushing of the distributing slide block, and are thrown into the eccentric wheel.

Preferably, the automatic assembling machine further comprises a steel ball detecting device for detecting whether the steel ball is put into the eccentric wheel, the eccentric wheel is provided with a blind hole for accommodating the steel ball, the steel ball detecting device comprises a moving part, a probe, an elastic part and a sensing device, the moving part is driven by a driving device and has a fixed moving stroke to be relatively close to or far away from the blind hole, the probe slidably penetrates through the moving part, one end of the elastic part acts on the moving part, the other end of the elastic part acts on the probe, when the moving part moves towards the blind hole, the elastic part is pressed and elastically deforms, the elastic part transmits pressure to the probe to drive the probe to move towards the blind hole, the probe stretches into the blind hole to measure the depth of the blind hole, and the sensing device detects whether the steel ball is put into the blind hole according to different distance differences between the probe and the moving driving device with the fixed stroke.

Preferably, the probe comprises a head, a tail and a rod body arranged between the head and the tail, the moving part is provided with a guide hole which is arranged towards the blind hole, the rod body is slidably matched in the guide hole, the tail extends into the blind hole to measure the depth of the blind hole, the sensing device is a correlation photoelectric sensor fixedly connected to the moving part, the head is arranged between the transmitting end and the receiving end of the correlation photoelectric sensor, the head is provided with a slit, and the distance difference between the moving part and the probe can be detected through the slit according to an optical signal emitted by the transmitting end, so that whether an object is put into the blind hole or not is detected.

Preferably, the automatic assembling machine further comprises an oil injector, and the oil injector injects oil to the steel balls in the eccentric wheel so as to lubricate the steel balls.

Preferably, the eccentric assembly mechanism is a vacuum nozzle.

The invention has the advantages that the problems of stable feeding of the stainless steel sheet, stable feeding of the plastic base, steel ball distribution, steel ball detection and the like are solved, the full-automatic assembly of the motor component in the miniature air pump is realized by matching with the conveying mechanism, the production efficiency of the product is greatly improved, the yield is improved, and the production cost of factories is reduced.

Drawings

FIG. 1 is a schematic diagram of a motor assembly in an embodiment;

FIG. 2 is a schematic view (angle one) of a motor assembly machine according to an embodiment;

FIG. 3 is a schematic view of a motor assembly machine (angle II) according to an embodiment;

FIG. 4 is a schematic view of a spin-on table in an embodiment;

FIG. 5 is a schematic view (angle one) of a stainless steel sheet mounting unit in the embodiment;

FIG. 6 is a schematic view (angle II) of a stainless steel sheet mounting unit in the embodiment;

FIG. 7 is a schematic view of a stainless steel sheet transport platform in an embodiment;

FIG. 8 is an exploded view of the stainless steel sheet transport platform of the embodiment;

FIG. 9 is a schematic view of a stainless steel sheet in an embodiment;

FIG. 10 is a schematic view of a stainless steel sheet conveying platform and a first feed mechanism in an embodiment;

FIG. 11 is a schematic view of a plastic base mounting unit in an embodiment;

FIG. 12 is a schematic view of a plastic base in an embodiment;

FIG. 13 is a schematic view of a plastic base conveyor platform in an embodiment;

FIG. 14 is an exploded view of the plastic base conveyor platform of the embodiment;

FIG. 15 is a schematic view showing the second and first protrusions of the plastic base being respectively insert-fitted into the third and fourth guide grooves in the embodiment;

FIG. 16 is a schematic view of a rotary indexing mechanism in an embodiment;

FIG. 17 is a schematic view of a plastic base conveyor platform and a second dispensing mechanism in an embodiment;

FIG. 18 is a schematic view of a first conveyor belt, a second jaw, and a third jaw in an embodiment;

fig. 19 is a schematic view of a steel ball distributing device in the embodiment;

Fig. 20 is a structural exploded view of the steel ball distributing device in the embodiment;

fig. 21 is a top view of the steel ball distributing device in the embodiment;

FIG. 22 is a cross-sectional view at B-B in FIG. 21;

Fig. 23 is a partial enlarged view of N in fig. 22;

FIG. 24 is a schematic view of a distributing hole of a distributing slider aligned with the opening of the lower end of the first conveying channel in the embodiment;

FIG. 25 is a schematic view of a dispensing orifice of a dispensing slider aligned with a blanking orifice in an embodiment;

FIG. 26 is a cross-sectional view taken at C-C of FIG. 21;

Fig. 27 is a schematic perspective view (angle one) of a steel ball detecting device in the embodiment;

fig. 28 is a schematic perspective view (angle two) of a steel ball detecting device in the embodiment;

fig. 29 is a partial enlarged view at H in fig. 27.

Detailed Description

For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention. The components in the figures are not drawn to scale and like reference numerals are generally used to designate like components.

The invention will now be further described with reference to the drawings and detailed description.

As a preferred embodiment of the present invention, there is provided an automatic assembling machine for implementing automatic assembly of a motor assembly in a micro air pump, as shown in fig. 1, the motor assembly of the micro air pump includes a motor 100, an optionally installed stainless steel sheet 200, a plastic base 300, and an eccentric 400, wherein the motor 100, the stainless steel sheet 200, and the plastic base 300 are fixedly connected together, the eccentric 400 is installed on the plastic base 300, and the eccentric 400 is rotated by the rotation of the motor 100. The eccentric wheel 400 is used for being connected with a swing rod of the miniature air pump, and the swing rod is driven to swing up and down by the rotation of the eccentric wheel 400, so that the air inlet and the air outlet of the miniature air pump are realized. Conventionally, steel balls coated with lubricating oil are also installed in the eccentric wheel 400, so that friction with the swing rod is reduced, and the service life of the air pump is prolonged. All the parts are commonly used in the miniature air pump, and the automatic assembling machine provided by the embodiment automatically assembles the dispersed motor 100, the stainless steel sheet 200, the plastic base 300, the eccentric wheel 400 and the steel balls together, so that the production efficiency is greatly improved, and the installation of the swing rod, the pump shell, the valve body and the like of the subsequent miniature air pump is convenient.

As shown in fig. 2 to 4, the automatic assembling machine includes a rotary table 1, the rotary table 1 being a table rotatable about a center point thereof, eight working positions being uniformly provided on the rotary table 1 about a center of rotation thereof, respectively a first station 101, a second station 102, a third station 103, a fourth station 104, a fifth station 105, a sixth station 106, a seventh station 107, and an eighth station 108. Each of the above stations is fixedly provided with a clamping seat 109 for clamping the motor 100, the first station 101 is a feeding station, the eighth station 108 is a material returning station, and the fool-proof detection unit 2, the stainless steel sheet mounting unit 3, the plastic base mounting unit 4, the first automatic screw locking machine 5, the second automatic screw locking machine 6 and the conveying clamping jaw 7 are sequentially arranged above the second station 102, the third station 103, the fourth station 104, the fifth station 105, the sixth station 106 and the seventh station 107. The worker manually installs the motor 100 on the holder 109 of the first station 101, and by the rotation of the rotary table 1, the motor 100 is sequentially conveyed to the fool-proof detecting unit 2, the stainless steel sheet installing unit 3, the plastic base installing unit 4, the first automatic screw locking machine 5, the second automatic screw locking machine 6, and the conveying claw 7 for detection, assembly, and conveyance. The rotary table 1 is essentially a conveying mechanism for conveying the parts to each process, and in other embodiments, the rotary table 1 may be other conveying mechanisms, such as a conveyor belt, but in this embodiment, the rotary table 1 is adopted and the rotating fool-proof detecting unit 2, the stainless steel sheet mounting unit 3, the plastic base mounting unit 4, the first automatic screw locking machine 5, the second automatic screw locking machine 6 and the conveying clamping jaw 7 are sequentially arranged around the rotary table 1, so that the parts can be conveyed between each process by utilizing the rotation of the rotary table 1, and the occupied area of the automatic assembling machine is greatly reduced.

The clamping holder 109 is provided with two clamping positions 1091 for mounting the motors 100 side by side, so that assembly of two motor assemblies can be performed simultaneously. The fool-proof detecting unit 2 is configured to detect whether the motor 100 is correctly mounted on the holder 109, if the feeding position of the motor 100 is incorrect, mark the clamping position 1091 in the electronic controller, and control the subsequent working unit not to assemble the motor 100 on the clamping position 1091 until the motor 100 rotates to the eighth station 108, and manually reject the motor 100. The fool-proof detection unit 2 is arranged, so that the problem that the motor 100 is inaccurate in position due to manual errors in the manual feeding process can be avoided, and the yield is improved. The fool-proof detection unit 2 may be implemented in particular by means of a position sensor, such as a photoelectric sensor, an ultrasonic sensor, a hall sensor, etc.

After the motor 100 clamped on the clamping seat 109 passes through the fool-proof detection unit 2, the motor passes through the rotation of the rotary table 1 to reach the third station 103, and the stainless steel sheet mounting unit 3 at the third station 103 is used for mounting the stainless steel sheet 200 on the motor 100. Referring to fig. 5 to 10, the stainless steel sheet mounting unit 3 includes a stainless steel sheet conveying platform 301 and a stainless steel sheet clamping jaw 302, on which the stainless steel sheet 200 is linearly conveyed, and in particular, a conveying mechanism such as a vibrating plate or a conveyor belt may be employed as a power source for pushing the stainless steel sheet 200 forward. As shown in fig. 7-8, the stainless steel sheet conveying platform 301 is provided with a first guide groove 303 and a second guide groove 304 which linearly extend towards the same direction, as shown in fig. 9, the stainless steel sheet 200 comprises a circular sheet-shaped first main body 2001, and a first lug 2002 and a second lug 2003 which are symmetrically and integrally connected to two ends of the first main body 2001, the first lug 2002 and the second lug 2003 extend along the thickness direction of the first main body 2001, so that the stainless steel sheet 200 is in a 'shape' in a side projection, the first main body 2001 is supported on the stainless steel sheet conveying platform 301, the first lug 2002 and the second lug 2003 are respectively inserted and matched in the first guide groove 303 and the second guide groove 304, so that the stainless steel sheet 200 can only be conveyed forwards along the extending direction of the first guide groove 303 and the second guide groove 304, and under the limitation of the first guide groove 303 and the second guide groove 304, the stainless steel sheet 200 cannot deflect in the conveying process, the position and the angle of the stainless steel sheet 200 cannot change in the conveying process, the automatic change in the conveying process is ensured, the automatic grabbing efficiency is met, and the subsequent assembly is greatly improved, and the assembly efficiency is greatly improved.

Further, a first height limiting plate 305 is fixedly disposed above the stainless steel sheet conveying platform 301 to limit the movement of the stainless steel sheet 200 in the height direction, thereby further maintaining the stability of the stainless steel sheet 200 during the conveying process.

A sensor bracket 306 is fixedly installed on the stainless steel sheet conveying platform 301, and is used for installing a sensor (not shown, which may be a conventional photoelectric sensor), so as to detect the conveying position of the stainless steel sheet 200 and prevent the stainless steel sheet 200 from being clamped on the stainless steel sheet conveying platform 301. The sensors may be provided in plural, and as in the present embodiment, a sensor 307 is further provided at the outlet of the stainless steel sheet conveying platform 301 to detect whether the stainless steel sheet 200 is normally fed out, the provision of plural sensors can increase the accuracy of detection and the reliability of the stainless steel sheet mounting unit 3.

In other embodiments, the stainless steel sheet 200 may have other shapes, so long as it needs to have two guiding engaging portions, which are respectively inserted and engaged in two guiding grooves of the conveying platform, so as to achieve limitation of deflection of the stainless steel sheet. The first and second ears 2002 and 2003 of the stainless steel sheet 200 in this embodiment are themselves fixing brackets for fixing the micro air pump, and the first and second guide grooves 303 and 304 are provided in cooperation with the shapes of the first and second ears 2002 and 2003.

With continued reference to fig. 5-6, stainless steel sheet clamping jaw 302 is disposed at the delivery outlet of stainless steel sheet delivery platform 301 for clamping stainless steel sheet 200 and assembling stainless steel sheet 200 to motor 100, in which case stainless steel sheet clamping jaw 302 is a conventional two-axis truss robot, although it could be a robot with a higher degree of freedom in other embodiments.

And referring to fig. 10, in order to improve the efficiency of transporting and assembling the stainless steel sheet 200, the stainless steel sheet mounting unit 3 further includes a first distributing mechanism 308, the first distributing mechanism 308 is disposed at the delivery outlet of the stainless steel sheet delivery platform 301, the first distributing mechanism 308 can slide left and right (i.e. slide left and right along the direction of T-T' in fig. 10) at the delivery outlet of the stainless steel sheet delivery platform 301 under the driving of the cylinder, the first distributing mechanism 308 is provided with a first receiving position 3081 and a second receiving position 3082, by the reciprocating movement of the first distributing mechanism 308, the second receiving position 3082 is aligned with the delivery outlet of the stainless steel sheet delivery platform 301 to receive the first stainless steel sheet 200, and then the first receiving position 3081 is aligned with the delivery outlet of the stainless steel sheet delivery platform 301 to receive the second stainless steel sheet 200, so that the first distributing mechanism 308 can receive two stainless steel sheets 200 from the delivery outlets of the stainless steel sheet delivery platform 301 and one stainless steel sheet 200 is respectively received at one receiving position. In this way, the two clamping positions 1091 of the corresponding clamping seat 109 form two assembling positions of the stainless steel sheet 200, and, as shown in fig. 6, the stainless steel sheet clamping jaw 302 includes a first stainless steel sheet clamping jaw 3021 and a second stainless steel sheet clamping jaw 3022 (the second stainless steel sheet clamping jaw 3022 is not drawn as a practical matter, but the situation that the second stainless steel sheet clamping jaw 3022 moves forward to be ready for clamping the stainless steel sheet 200 is drawn for reference), the two stainless steel sheets 200 are respectively used for clamping the stainless steel sheet 200 in the first receiving position 3081 and the second receiving position 3082, and the two stainless steel sheets 200 are simultaneously assembled on the motor 100 in the two clamping positions 1091 by the first stainless steel sheet clamping jaw 3021 and the second stainless steel sheet clamping jaw 3022, so that a double-station assembling mode is formed, and the assembling efficiency is improved.

In this embodiment, the first material dividing mechanism 308 is reciprocally sliding, and in other embodiments, the material dividing mechanism may be reciprocally swinging, for example, the material dividing mechanism is configured to be in a shape of a right circular arc, and the circular arc edge of the material dividing mechanism is abutted against the delivery outlet of the stainless steel sheet delivery platform 301, or a plurality of receiving positions may be formed to align with the delivery outlet of the stainless steel sheet delivery platform 301 in sequence.

The stainless steel sheet 200 is used as a fixing support for fixing the micro air pump (for example, in an application, the micro air pump is fixed inside the coffee machine by using the stainless steel sheet 200), but the stainless steel sheet 200 is not necessary, and a solution for fixing the micro air pump by using a micro air pump shell or other mounting structures is also available according to the requirement of customization. Therefore, the stainless steel sheet 200 is not required to be mounted in some specifications of the micro air pump, and for such a micro air pump, the stainless steel sheet mounting unit 3 is simply omitted and the stainless steel sheet mounting unit 3 is set to a non-operating state at the time of automatic mounting of the motor assembly.

After the completion of the mounting process at the third station 103, the motor 100 and the stainless steel sheet 200 are transferred to the fourth station 104 by the rotation of the rotary table 1, and the plastic base 300 is assembled by the plastic base mounting unit 4. As shown in fig. 11 to 17, the plastic base mounting unit 4 includes a plastic base conveying platform 401 and plastic base jaws 402, and the plastic base 300 is linearly conveyed on the plastic base conveying platform 401, and in particular, a conveying mechanism such as a vibrating tray or a conveyor belt may be employed as a power source for pushing the plastic base 300 forward.

As shown in fig. 12, the plastic base 300 in the present embodiment includes a cylindrical second main body 3001, and a first post 3002 and a second post 3003 respectively disposed on two end surfaces of the second main body 3001, wherein the first post 3002 is used for positioning the plastic base 300 and the motor, and the second post 3003 is used for placing a screw to lock and fix the plastic base 300 and the motor.

13-15, The plastic base transport platform 401 includes a base 4011 having a generally U-shaped cross-section and second and third height limiting plates 4012 and 4013 fixedly mounted on the base 4011, the second and third height limiting plates 4012 and 4013 enclosing to form a transfer channel generally matching the profile of the plastic base 300, the second and third height limiting plates 4012 and 4013 restricting movement of the plastic base 300 from the height direction. The base 4011 and the second height limiting plate 4012 are respectively provided with a third guide groove 4013 and a fourth guide groove 4014 which linearly extend towards the conveying direction of the plastic base 300, the second main body 3001 of the plastic base 300 is supported on the plastic base conveying platform 401, and the second protruding column 3003 and the first protruding column 3002 are respectively inserted and matched into the third guide groove 4013 and the fourth guide groove 4014, so that the plastic base 300 can only be conveyed forwards along the extending direction of the third guide groove 4013 and the fourth guide groove 4014, and the plastic base 300 cannot deflect in the conveying process under the limitation of the third guide groove 4013 and the fourth guide groove 4014, so that the position and the angle of the plastic base 300 are not changed in the conveying process, and are not inclined, the follow-up automatic grabbing and assembling requirements are met, the automatic assembling is realized, and the assembling efficiency of the miniature air pump is greatly improved.

A sensor bracket 4015 is fixedly installed on the plastic base conveying platform 401, and is used for installing a sensor (not shown, which may be a conventional photoelectric sensor), so as to detect the conveying position of the plastic base 300, and prevent the plastic base 300 from generating a clamping position on the plastic base conveying platform 401. The arrangement of a plurality of sensors can increase the accuracy of detection and the reliability of the automatic transmission device.

Because the positions of the first boss 3002 and the second boss 3003 are fixed in the structure of the plastic base 300, in order to cooperate with the third guide groove 4013 and the fourth guide groove 4014 at the same time, the placement angle of the plastic base 300 on the plastic base conveying platform 401 is limited, in some cases, the angle of the plastic base 300 output by the plastic base conveying platform 401 cannot meet the requirement of automatic assembly, so as to be shown in fig. 11 and 16, the plastic base mounting unit 4 further comprises a rotary positioning mechanism 403, the rotary positioning mechanism 403 comprises a rotary seat 4031 driven by a driving device (such as a rotary cylinder) to rotate, the plastic base clamping jaw 402 comprises a first group of plastic base clamping jaws 4021 positioned at the front of the conveying direction of the plastic base 300 and a second group of plastic base 4022 positioned at the rear of the conveying direction of the plastic base 300, after the plastic base 300 is output by the plastic base conveying platform 401, the second group of plastic base clamping jaws 2 is grabbed onto the rotary positioning mechanism 403 to perform the adjustment of the placement angle, the plastic base 300 grabbed onto the rotary seat 4031, and then the plastic clamping jaw 300 is driven by a driving device (such as a rotary cylinder) to rotate the plastic clamping jaw 40) to be assembled to the plastic clamping jaw 300, and then the plastic clamping jaw 300 is required to be assembled to be positioned on the base seat 405. By providing the rotational positioning mechanism 403, the angle of the plastic base 300 is further adjusted to compensate for the limited angle of the plastic base 300 for mating with the third guide slot 4013 and the fourth guide slot 4014, thereby improving flexibility and applicability of the device.

The clamping position 1091 on the fourth station 104 and the rotary positioning mechanism 403 of the plastic base mounting unit 4 are both disposed in front of the conveying direction of the plastic base 300, and the interval between the clamping position 1091 and the rotary positioning mechanism 403 is equal to the interval between the rotary positioning mechanism 403 and the output port of the plastic base conveying platform 401, then the first group of plastic base clamping claws 4021 and the second group of plastic base clamping claws 4022 can operate synchronously, that is:

1. When the first set of plastic base jaws 4021 is above the rotational positioning mechanism 403, the second set of plastic base jaws 4022 is just above the output port of the plastic base transport platform 401;

2. when the first set of plastic base clamping jaws 4021 grabs the previous plastic base 300 on the rotating base 4031 downward, the second set of plastic base clamping jaws 4022 also grabs the next plastic base 300 at the output port of the plastic base conveying platform 401 downward;

3. when the first set of plastic base jaws 4021 translates over the clamping position 109, the second set of plastic base jaws 4022 translates just over the rotary positioning mechanism 403;

4. when the first set of plastic base jaws 4021 is assembled with the previous plastic base 300 down on the stainless steel sheet 200 on the clamping location 1091, the second set of plastic base jaws 4022 is also assembled with the next plastic base 300 down on the swivel 4031.

Therefore, the first plastic base clamping jaw 4021 and the second plastic base clamping jaw 4022 can be uniformly controlled to translate in the conveying direction of the plastic base 300 by a sliding guide rail mechanism, and can also be uniformly controlled to move up and down and grasp by a driving device, so that synchronous actions are realized, the machine cost is reduced, and the transmission efficiency is improved.

And, referring to fig. 17, in order to improve the efficiency of the plastic base 300 in transportation and assembly, the plastic base mounting unit 4 further includes a second distributing mechanism 404, where the second distributing mechanism 404 is disposed at the delivery outlet of the plastic base delivery platform 401, and the second distributing mechanism 404 can slide left and right (i.e. slide left and right along the direction M-M' in fig. 17) at the delivery outlet of the plastic base delivery platform 401 under the driving of the cylinder, where two receiving positions of the plastic base 300 are disposed on the second distributing mechanism 404, and by the reciprocating movement of the second distributing mechanism 404, one of the receiving positions is aligned with the delivery outlet of the plastic base delivery platform 401, and then receives the first plastic base 300, and the other receiving position is aligned with the delivery outlet of the plastic base delivery platform 401, and receives the second plastic base 300, and then the second distributing mechanism 404 can receive two plastic bases 300 from the delivery outlet of the plastic base delivery platform 401, and receive one plastic base 300 respectively. In this way, two assembly stations of plastic bases 300 are formed. As shown in connection with fig. 11, the first set of plastic base jaws 4021 includes a first plastic base jaw 40211 and a second plastic base jaw 40212 (the second plastic base jaw 40212 is not drawn as a practical matter, but the situation that the second plastic base jaw 40212 is moved forward to clamp the plastic base 300 is drawn for reference), the second set of plastic base jaws 4022 includes a third plastic base jaw 40221 and a fourth plastic base jaw 40222 (the third plastic base jaw 40221 is not drawn as a practical matter, but the situation that the third plastic base jaw 40221 is moved forward to clamp the plastic base 300 is drawn for reference), and two clamping jaws on the two sets of clamping jaws correspond to two receiving positions on the second dispensing mechanism 404 respectively, and cooperate with two clamping positions 1091 on the clamping holder 109 to simultaneously carry out transmission and assembly of the two plastic bases 300, so that a double-station assembly mode is formed, and assembly efficiency is improved.

In this embodiment, the second distributing mechanism 404 slides reciprocally, and in other embodiments, the distributing mechanism may also swing reciprocally, for example, the distributing mechanism is configured to be in a shape of a right circular arc, and its circular edge is abutted against the delivery outlet of the plastic base delivery platform 401, or a plurality of receiving positions may be formed to align with the delivery outlet of the plastic base delivery platform 401 in sequence.

After passing through the fourth station 104, the motor 100, the stainless steel sheet 200 and the plastic base 300 are simply stacked together without being fixedly connected. The first automatic screw locking machine 5 at the fifth station 105 and the second automatic screw locking machine 6 at the sixth station 106 lock and fix the plastic base 300 and the motor 100 together at two screw locking positions, respectively, and the stainless steel sheet 200 is clamped and fixed between the plastic base 300 and the motor 100. After completion, the motor 100, the stainless steel sheet 200 and the plastic base 300 assembled as one body are transferred to the seventh station 107 again, and transferred onto the first conveyor belt 8 by the first clamping jaw 7.

As shown in fig. 18, the first conveyor belt 8 conveys the motor 100, the stainless steel sheet 200 and the plastic base 300 assembled as one body forward in a vertical state, ensuring that the plastic base 300 is disposed upward for easy installation of the eccentric 400.

Before the eccentric wheel 400 is installed, steel balls need to be assembled on the eccentric wheel 400, therefore, the automatic assembling machine further comprises a steel ball distributing device 9, referring to fig. 19-26, the steel ball distributing device 9 comprises a base 91 and a sliding seat 92 and a base 93 fixedly connected to the base 91, a steel ball bottle 94 for storing the steel balls is fixedly connected to the upper end of the base 93 and stretches into the interior of the base 93, a first conveying channel 99 which is downward along the gravity direction is arranged at the lower end of the steel ball bottle 94 in the base 93, the caliber of the first conveying channel 99 is slightly larger than the outer diameter of the steel balls, the steel balls are stacked and arranged in the first conveying channel 99 from top to bottom along the gravity direction, a slideway 910 which is perpendicular to the first conveying channel 99 is arranged at the outlet of the first conveying channel 99, a distributing slide 95 which slides back and forth along the slideway 910 is slidably connected, a distributing hole 951 for containing a single steel ball is arranged on the distributing slide 95, and when the distributing slide 95 is aligned with the outlet of the lower end of the first conveying channel 99, so that the single steel ball 951 slides in the single slide 95, and the single slide 95 is pushed to slide in the distributing slide 95.

With continued reference to fig. 23, a slide 910 is provided with a blanking hole 921, the lower end of the blanking hole 921 is connected with a second conveying channel 911 downward along the gravity direction, and referring to fig. 23, 24 and 25 in sequence, in a working process, the material distributing slide 95 is sequentially retracted to enable the material distributing hole 951 to be aligned with the lower end outlet of the first conveying channel 99, a single steel ball falls into the material distributing hole 951, and then the single steel ball is pushed to move in the slide 10 forward, so that the steel ball finally enters the blanking hole 921 and is conveyed downward along the second conveying channel 911.

With the steel ball distributing device provided by the embodiment, the automation of single steel ball distributing is realized, the eccentric wheel 400 is conveyed below the second conveying channel 911, and the steel balls are thrown into the eccentric wheel 400 by gravity through the second conveying channel 911.

Because the steel balls are magnetic and easy to be stained with oil stain in the conveying process, the steel balls may be blocked in the lower end outlet of the first conveying channel 99 or the blanking hole 921 in the conveying process of the material distributing slide block 95, so that in order to further improve the reliability of the steel ball distributing device and reduce the failure rate, an air blowing device is further arranged to assist the steel balls to fall from the first conveying channel 99 or the blanking hole 921. As shown in fig. 23, a first gas channel 922 extending along the gravity direction is opened above the blanking hole 921, and a gas is introduced into the first gas channel 922 through a gas blowing device (not shown, for example, a nitrogen gas source externally connected with a gas pipe) to blow gas into the blanking hole 921, so as to assist the steel balls to drop from the blanking hole 921. Similarly, referring to fig. 26, a second gas channel 923 connected to the first conveying channel 99 may be further formed on the base 93, and a gas is introduced into the second gas channel 923 by a blowing device to blow down along the first conveying channel 99, so as to assist the auxiliary steel balls to fall from the first conveying channel 99.

In this embodiment, the first gas channel 922 and the second gas channel 923 are respectively connected to the blanking hole 921 and the first conveying channel 99, so as to improve the air guiding effect, and in other embodiments, the air blowing device may be directly arranged above the blanking hole 921 or the first conveying channel 99 to blow air.

The passages in this embodiment, such as a delivery channel 9, slide 910, blanking hole 921, first gas channel 922, and second gas channel 923, are formed in the base 93, but in other embodiments, tubular conduit structures may be used instead.

Referring to fig. 22, a hall sensor 912 is further provided at the outer side of the second conveying path 911 to sense whether the steel balls pass through smoothly, and when a problem occurs, the device can be rapidly stopped for maintenance. In other embodiments, the hall sensor 912 may be other sensing devices, such as a photosensor.

And the lower end of the second conveying channel 911 is in a gradually contracted cone-shaped structure so as to guide the discharge position of the steel balls and improve the accuracy of the steel balls put into the eccentric wheel 400.

In this embodiment, the material-distributing slide 95 is driven by the air cylinder 96 to slide, and the air cylinder 96 may be replaced by other driving devices, such as a motor and an oil cylinder.

The first and second conveying passages 99 and 911 are vertically extended downward in the gravity direction in this embodiment, but may be extended downward obliquely in other embodiments without affecting the conveying effect of the steel balls.

In order to further improve the yield, referring to fig. 27-29, the present embodiment further includes a steel ball detecting device 13 for detecting whether steel balls are put into the blind holes 4001 on the eccentric wheels 400, where the eccentric wheels 400 can be conveyed on the conveying device 131, and steel balls are put into the blind holes 4001 through the steel ball distributing device 9, and the steel ball detecting device is disposed downstream of the steel ball distributing device 9 to detect each eccentric wheel 400, so as to form a working mode of a production line, so as to improve the efficiency.

The steel ball detection device comprises a moving block 134, wherein the moving block 134 is fixedly connected to a guide rod of an air cylinder 133, and the air cylinder 133 drives the moving block 134 to move and has a moving stroke relatively far from or close to a blind hole 4001. The moving direction of the moving block 134 is along the axial direction of the blind hole 4001, the probe 135 is installed on the moving block 134, the arrangement direction of the probe 135 is also along the axial direction of the blind hole 4001, the probe 135 comprises a head 1351, a tail 1353 and a rod 1352 positioned between the head 1351 and the tail 1353, the moving block 134 is provided with a guide hole (not shown) opened along the moving direction, and the rod 1352 extends into the guide hole, so that the probe 135 is slidingly connected to the moving block 134. A pressing spring 136 is further disposed between the probe 135 and the moving block 134, and specifically, the shaft 1352 has an expanded diameter portion 13521 at a position near the tail portion 1353, and one end of the pressing spring 136 abuts against the expanded diameter portion 13521 and the other end abuts against the moving block 134. Then, when the moving block 134 moves toward the blind hole 4001, the moving block 134 presses the spring 136 to apply pressure and elastically deform the spring 136, the spring 136 transmits pressure to the probe 135 to drive the probe 135 to move toward the blind hole 4001, and the probe 135 extends into the blind hole 4001 to measure the depth of the blind hole 4001.

When the probe 135 extends into the blind hole 4001, the probe 135 contacts either the bottom of the blind hole 4001 or the steel ball in the blind hole 4001 depending on whether the steel ball is missing, so the probe 135 has two strokes of inconsistent length depending on whether the steel ball is missing. In the present embodiment, the movement stroke of the moving block 134 is fixed, that is, is preset and unchanged. The moving block 134 and the probe 135 are caused to have two different differences in distance depending on whether the steel ball is missing or not. For example, when there are steel balls in the blind hole 4001, the head 1351 is farther from the moving block 134, and when there are no steel balls in the blind hole 4001, the head 1351 is closer to the moving block 134. According to the distance change, whether the steel ball is neglected or not can be judged by arranging the sensing device.

In this embodiment, the sensing device is an opposite-type photoelectric sensor, wherein two parallel protrusions 1341 and 1342 are disposed on the moving block 134, a head 1351 extends between the protrusions 1341 and 1342, a receiving end and a transmitting end of the opposite-type photoelectric sensor are disposed on inner sides of the protrusions 1341 and 1342, a slit 137 is disposed on the head 1351, and when a steel ball is disposed in the blind hole 4001, an optical signal emitted from the transmitting end of the opposite-type photoelectric sensor just passes through the slit 137 and is received by the receiving end to generate a judging signal.

In addition, in other embodiments, other sensing devices capable of generating a signal according to the distance of the position, such as a reflective photoelectric sensor, a hall sensor, a micro switch, etc., may be selected.

When the moving member 4 moves away from the blind hole 4001, the pressing spring 136 drives the probe 135 to reset by the elastic restoring force of the pressing spring, and the outer diameter of the head 1351 is larger than the aperture of the guide hole on the moving block 134, so that when the probe 135 resets, the head 1351 always abuts against the hole end of the guide hole on the moving block 134, and the relative distance between the moving block 134 and the probe 135 is ensured to be unchanged. The compression spring 136 may be replaced by other elastic members, such as a spring plate.

After the detection steel balls are actually arranged on the eccentric wheel 400, the eccentric wheel 400 continues to be conveyed forwards, and the oil lubricator 10 lubricates oil into the blind holes 4001 so as to lubricate the steel balls, reduce friction force between the steel balls and the swing rod and prolong the service life of the air pump.

The eccentric 400 is then sucked up by the two-axis moving vacuum nozzle 14 and fitted onto the plastic base 300 on the first conveyor belt 8. At this time, the assembling work of the motor assembly is completed. In other embodiments, the vacuum nozzle 14 may be other assembly mechanisms, such as a clamping jaw. The vacuum suction nozzle 14 can effectively ensure the suction and the installation of the eccentric wheel 400 with smaller size, and improve the reliability.

The vacuum nozzle 14, the conveyor 131 and the steel ball distributing device 9 are in this embodiment used for performing the mounting of the eccentric and the steel balls, and are thus collectively referred to as an eccentric mounting unit.

The second clamping jaw 15 and the third clamping jaw 16 are arranged at the tail end of the first conveyor belt 8, the second clamping jaw 15 clamps the motor assembly onto the third clamping jaw 16, and the third clamping jaw 16 places the motor assembly on the second conveyor belt 8 in a lying posture through swinging so as to prevent the motor assembly from falling in a vertical state and damaging motor pins.

The automatic assembling machine of the embodiment obviously can control the working sequence of each working unit through an electrical control technology, and is matched with a sensor and a conveying mechanism to control the conveying and assembling of parts.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An automatic assembling machine is used for automatically assembling a motor component in a miniature air pump, and the motor component at least comprises a motor, a plastic base, an eccentric wheel and steel balls, and is characterized by comprising a clamping seat, a plastic base mounting unit, an automatic screw locking machine and an eccentric wheel mounting unit,

The motor is clamped and fixed on the clamping seat,

The plastic base mounting unit conveys the plastic base and mounts the plastic base on the motor, the automatic screw locking machine is used for fixing the plastic base and the motor in a screw locking manner,

The eccentric wheel mounting unit comprises an eccentric wheel conveying device, a steel ball distributing device and an eccentric wheel assembling mechanism, wherein the eccentric wheel conveying device is used for conveying eccentric wheels, the steel ball distributing device is arranged above the eccentric wheel conveying device, the steel ball distributing device separates out single steel balls and puts the steel balls into the eccentric wheels for assembly, and the eccentric wheel assembling mechanism picks up the eccentric wheels and assembles the eccentric wheels on the plastic base;

the motor assembly further comprises a stainless steel sheet, the automatic assembling machine further comprises a stainless steel sheet mounting unit, the stainless steel sheet mounting unit conveys the stainless steel sheet and places the stainless steel sheet on the motor, the plastic base is stacked on the stainless steel sheet, and the plastic base and the motor screw lock are fixed through the automatic screw locking machine, so that the stainless steel sheet is pressed and fixed between the plastic base and the motor screw lock;

the stainless steel sheet mounting unit comprises a stainless steel sheet conveying platform, wherein the stainless steel sheet is linearly conveyed on the stainless steel sheet conveying platform, a first guide groove and a second guide groove which linearly extend towards the same direction are formed in the stainless steel sheet conveying platform, the stainless steel sheet comprises a circular sheet-shaped first main body, a first lug part and a second lug part, the first lug part and the second lug part are respectively inserted and matched into the first guide groove and the second guide groove, and therefore the first guide groove and the second guide groove limit the stainless steel sheet to be conveyed along the extending direction of the first guide groove and the second guide groove in a non-deflecting manner;

The first ear portion and the second ear portion extend along a thickness direction of the first main body.

2. The automatic assembling machine according to claim 1, further comprising a rotary table, wherein the holder is fixedly installed on the rotary table, the stainless steel sheet installation unit, the plastic base installation unit, and the automatic screw locking machine are sequentially disposed around the rotary table, and the rotary table sequentially transfers the holder to the stainless steel sheet installation unit, the plastic base installation unit, and the automatic screw locking machine by rotation thereof to perform installation of the stainless steel sheet, installation of the plastic base, and screw locking fixation of the plastic base and the motor, respectively.

3. The automated assembling machine according to claim 2, further comprising a first gripper and a first conveyor belt, the first gripper gripping the plastic base and the motor fixed together onto the first conveyor belt, the plastic base and the motor being conveyed in a vertical state on the first conveyor belt to a position of the eccentric mounting unit to mount the eccentric.

4. The automated assembling machine of claim 3, further comprising a second jaw, a third jaw, and a second conveyor, wherein the second jaw clamps the assembled motor assembly onto the third jaw, and wherein the third jaw swings to place the motor assembly in a lying position on the second conveyor and out of the automated assembling machine.

5. The automated assembling machine according to claim 1, further comprising a fool-proof detecting unit that detects whether the motor is properly mounted on the holder and feeds back a detection signal to control whether the motor is to be subsequently assembled.

6. The automated assembling machine of claim 1, wherein the stainless steel sheet mounting unit further comprises a stainless steel sheet gripper disposed at a delivery outlet of the stainless steel sheet delivery platform for gripping the stainless steel sheet and placing the stainless steel sheet on the motor.

7. The automated assembling machine according to claim 1, wherein the plastic base mounting unit comprises a plastic base conveying platform and plastic base clamping jaws, the plastic base is linearly conveyed on the plastic base conveying platform, a third guide groove and a fourth guide groove which linearly extend towards the same direction are formed in the plastic base conveying platform, the plastic base comprises a cylindrical second main body, a first protruding column used for mounting and positioning between the plastic base and the motor and a second protruding column used for placing screws to lock and fix the plastic base and the motor, the first protruding column and the second protruding column are respectively arranged on two end faces of the second main body, the first protruding column and the second protruding column are respectively inserted and matched in the fourth guide groove and the third guide groove and the fourth guide groove are used for limiting the plastic base to be conveyed along the extending direction of the third guide groove and the fourth guide groove, the plastic base clamping jaws are arranged at a conveying outlet of the plastic base conveying platform, the plastic base is rotatably arranged, the plastic base is clamped by the plastic clamping jaws, and the plastic base is placed on the plastic clamping jaws rotatably and placed on the plastic base by the rotating mechanism.

8. The automatic assembling machine according to claim 1, wherein the steel ball distributing device comprises a storage container storing a plurality of steel balls, a first conveying channel extending downwards is arranged at the lower end of the storage container in the gravity direction, the caliber of the first conveying channel is slightly larger than the outer diameter of the steel balls, a slideway is arranged at the outlet of the first conveying channel, a distributing slider sliding along the slideway is connected in a sliding manner, a distributing hole for containing the single steel balls is arranged on the distributing slider in a sliding manner, the distributing slider is aligned with the outlet at the lower end of the first conveying channel through sliding, so that the single steel balls fall into the distributing hole, the distributing slider pushes the single steel balls to move in the slideway, a blanking hole is arranged on the slideway, a second conveying channel extending downwards is connected at the lower end of the blanking hole, and the single steel balls enter the second conveying channel to be conveyed downwards under the pushing of the distributing slider, and are thrown into the eccentric wheel.

9. The automatic assembling machine according to claim 1, further comprising steel ball detecting means for detecting whether steel balls are put into engagement in an eccentric wheel having a blind hole for accommodating the steel balls, wherein the steel ball detecting means includes a moving member driven by a driving means and having a fixed moving stroke to be relatively close to or far from the blind hole, a probe slidably penetrating through the moving member, one end of the elastic member acting on the moving member, the other end acting on the probe, the elastic member being pressed against the elastic member and elastically deformed by the elastic member when the moving member moves toward the blind hole, the elastic member transmitting pressure to the probe to drive the probe to move toward the blind hole, the probe extending into the blind hole to measure the depth of the blind hole, the probe forming different distance differences with the moving driving means having a fixed stroke, and the sensing means detecting whether the steel balls are put into the blind hole or not according to the different distance differences.

10. The automatic assembling machine according to claim 9, wherein the probe comprises a head part, a tail part and a rod body arranged between the head part and the tail part, the moving part is provided with a guide hole which is arranged towards the blind hole, the rod body is slidably matched in the guide hole, the tail part stretches into the blind hole to measure the depth of the blind hole, the sensing device is an opposite-type photoelectric sensor fixedly connected to the moving part, the head part is arranged between a transmitting end and a receiving end of the opposite-type photoelectric sensor, a slit is arranged on the head part, and the distance difference between the moving part and the probe can be detected through the slit according to an optical signal emitted by the transmitting end, so that whether an object is put into the blind hole is detected.

11. The automated assembling machine of claim 1, further comprising an oil injector that injects oil into the steel balls in the eccentric to lubricate the steel balls.

12. The automated assembling machine of claim 1, wherein the eccentric assembling mechanism is a vacuum nozzle.