Automatic assembly machine

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

Technical Field

[0001] The invention relates to the field of automatic assembly devices, in particular to an automatic assembly machine for a micro air pump. Background Art

[0002] A micro air pump is a gas delivery device that is small in size and has a gaseous working medium. It is mainly used for gas sampling, gas circulation, vacuum adsorption, vacuum pressure maintenance, air extraction, inflation, pressurization, and other purposes. Conventional micro air pumps usually include a motor, a stainless steel sheet, a plastic base, an eccentric wheel, and a steel ball. The plastic base is fixedly mounted on one end of the motor, the stainless steel sheet is clamped and fixed between the motor and the plastic base, the eccentric wheel is mounted on the plastic base, and the steel ball is installed in the eccentric wheel (for convenience, the assembly of these parts is called a motor assembly). However, these parts are difficult to assemble together automatically, mainly because:

[0003] 1. The stainless steel sheet and the plastic base have certain position and angle requirements when they are installed. If a gripper (or manipulator) is used to assemble the stainless steel sheet or the plastic base on the motor, the stainless steel sheet or the plastic base needs to be transported to the assembly position in a stable state. If a general automatic conveying device, such as a vibration plate, a conveyor belt, etc., is used for conveying, the position and angle of the stainless steel sheet and the plastic base cannot be guaranteed not to change during the conveying process due to insufficient constraints on the stainless steel sheet and the plastic base.

[0004] 2. Steel balls are usually stored in steel ball bottles. Steel balls themselves have certain magnetism and are easily contaminated with oil during transportation. Steel balls are easily stuck together, so it is difficult to use automated conveying to transport steel balls.

[0005] Therefore, in the prior art, micro air pumps are still produced by manual assembly by workers. On the one hand, the manual assembly method has low production efficiency and is difficult to meet the production needs of the factory. On the other hand, manual assembly also results in a low product qualification rate and a high defective product outflow rate. Summary of the invention

[0006] Therefore, in view of the above problems, the present invention proposes an automatic assembly machine to fully automatically assemble the motor assembly in the micro air pump, thereby improving production efficiency and product qualification rate.

[0007] The present invention is implemented by the following technical solutions:

[0008] The present invention proposes an automatic assembly machine for automatically assembling a motor assembly in a micro air pump. The motor assembly includes at least a motor, a plastic base, an eccentric wheel and a steel ball. The machine is characterized in that it includes 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 to screw the plastic base and the motor together. The eccentric wheel mounting unit includes an eccentric wheel conveying device, a steel ball distributing device and an eccentric wheel assembly mechanism. The eccentric wheel conveying device is used to convey the eccentric wheel. The steel ball distributing device is arranged above the eccentric wheel conveying device. The steel ball distributing device separates a single steel ball and puts the steel ball into the eccentric wheel for assembly. The eccentric wheel assembly mechanism picks up the eccentric wheel and assembles the eccentric wheel on the plastic base.

[0009] Preferably, the motor assembly also includes a stainless steel sheet, and the automatic assembly machine also includes a stainless steel sheet installation unit, which conveys the stainless steel sheet and places the stainless steel sheet on the motor, and the plastic base is stacked on the stainless steel sheet, and the plastic base and the motor are fixed by an automatic screw locking machine, so that the stainless steel sheet is pressed and fixed between the plastic base and the motor screw.

[0010] Preferably, the automatic assembly machine also includes a rotating table, the clamping base is fixedly mounted on the rotating table, the stainless steel sheet mounting unit, the plastic base mounting unit, and the automatic screw locking machine are sequentially arranged around the rotating table, and the rotating table sequentially transfers the clamping base to the stainless steel sheet mounting unit, the plastic base mounting unit, and the automatic screw locking machine through its rotation to respectively perform the installation of the stainless steel sheet, the installation of the plastic base, and the screw locking fixation of the plastic base and the motor.

[0011] Preferably, the automatic assembly machine also includes a first clamp and a first conveyor belt, the first clamp 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 the position of the eccentric wheel installation unit to install the eccentric wheel.

[0012] Preferably, the automatic assembly machine also includes a second clamp, a third clamp and a second conveyor belt. The second clamp clamps the assembled motor assembly onto the third clamp, and the third clamp swings to place the motor assembly in a flat position on the second conveyor belt and transmits it out of the automatic assembly machine.

[0013] Preferably, the automatic assembly machine further comprises a foolproof detection unit, which detects whether the motor is correctly installed on the clamping seat and feeds back a detection signal to control whether the motor is subsequently assembled.

[0014] Preferably, the stainless steel sheet installation unit includes a stainless steel sheet conveying platform and a stainless steel sheet clamp, the stainless steel sheet is linearly transmitted on the stainless steel sheet conveying platform, the stainless steel sheet conveying platform is provided with a first guide groove and a second guide groove extending linearly in the same direction, the stainless steel sheet includes a first main body in the shape of a circular sheet and a first ear and a second ear as a fixed bracket of the micro air pump, the first ear and the second ear are symmetrically connected to both ends of the first main body, the first ear and the second ear are respectively inserted and fitted in the first guide groove and the second guide groove, so that the first guide groove and the second guide groove limit the stainless steel sheet to be conveyed without deflection along the extension direction of the first guide groove and the second guide groove, the stainless steel sheet clamp is arranged at the conveying outlet of the stainless steel sheet conveying platform, for clamping the stainless steel sheet and placing the stainless steel sheet on the motor.

[0015] Preferably, the plastic base installation unit comprises a plastic base conveying platform and a plastic base clamping claw, the plastic base is linearly transported on the plastic base conveying platform, the plastic base conveying platform is provided with a third guide groove and a fourth guide groove extending linearly in the same direction, the plastic base comprises a cylindrical second body, and a first boss for mounting and positioning between the plastic base and the motor and a second boss for inserting a screw to lock and fix the plastic base and the motor, the first boss and the second boss are respectively located on the two end surfaces of the second body, the first boss and the second boss are respectively inserted into the matching The plastic base is engaged 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 transported without deflection along the extension direction of the third guide groove and the fourth guide groove. The plastic base clamp is arranged at the conveying outlet of the plastic base conveying platform, and also includes a rotary positioning mechanism. The plastic base clamp grasps the plastic base and places the plastic base on the rotary positioning mechanism. The placement angle of the plastic base is adjusted by rotating the rotary positioning mechanism, and the plastic base clamp then clamps the plastic base and places it on the motor.

[0016] Preferably, the steel ball distributing device comprises a storage container for storing a plurality of steel balls, the storage container is provided with a first conveying channel extending downward at its lower end in the gravity direction, the diameter 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 slide is provided at the outlet of the first conveying channel, a distributing slider which slides back and forth along the slide is slidably connected in the slide, a distributing hole for accommodating a single steel ball is provided on the distributing slider, the distributing slider slides so as to align the distributing hole with the lower end outlet of the first conveying channel, so that a single steel ball falls into the distributing hole, the distributing slider pushes the single steel ball to move in the slide, a drop hole is provided on the slide, the lower end of the drop hole is connected with a second conveying channel extending downward, the single steel ball enters the second conveying channel from the drop hole under the push of the distributing slider, is transported downward, and is put into the eccentric wheel.

[0017] Preferably, the automatic assembly machine also includes a steel ball detection device for detecting whether a steel ball is put into the eccentric wheel. The eccentric wheel has a blind hole for accommodating the steel ball. The steel ball detection device includes 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 relatively approach or move away from the blind hole. The probe can slide through the moving part. One end of the elastic part acts on the moving part and the other end acts on the probe. When the moving part moves toward the blind hole, it applies pressure to the elastic part and causes the elastic part to produce elastic deformation. The elastic part transmits pressure to the probe, thereby driving the probe to move toward the blind hole. The probe extends into the blind hole to measure the depth of the blind hole. According to the depth of the blind hole, the probe and the mobile driving device with a fixed stroke form different distance differences. The sensing device detects whether the steel ball is put into the blind hole according to the different distance differences.

[0018] Preferably, the probe includes a head, a tail and a shaft located between the head and the tail, the movable part has a guide hole opened toward the blind hole, the shaft can be slidably fitted in the guide hole, the tail extends into the blind hole to measure the depth of the blind hole, the sensing device is a through-beam photoelectric sensor fixedly connected to the movable part, the head is arranged between the transmitting end and the receiving end of the through-beam photoelectric sensor, and a slit is provided on the head, and the light signal emitted by the transmitting end can pass through the slit to detect the distance difference between the movable part and the probe, thereby detecting whether the object is put into the blind hole.

[0019] Preferably, the automatic assembly machine further comprises an oiler, which injects oil into the steel balls in the eccentric wheel to lubricate the steel balls.

[0020] Preferably, the eccentric wheel assembly mechanism is a vacuum suction nozzle.

[0021] The present invention has the following beneficial effects: the present invention simultaneously solves the problems of stable feeding of stainless steel sheets, stable feeding of plastic bases, distribution of steel balls, detection of steel balls, etc., and cooperates with the conveying mechanism to realize the fully automatic assembly of the motor assembly in the micro air pump, which greatly improves the production efficiency of the product, improves the yield, and reduces the production cost of the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a motor assembly in an embodiment;

[0023] Figure 2 is a schematic diagram of a motor assembly machine in an embodiment (angle 1);

[0024] Figure 3is a schematic diagram of a motor assembly machine in an embodiment (angle 2);

[0025] Figure 4 is a schematic diagram of a rotating table in an embodiment;

[0026] Figure 5 is a schematic diagram of a stainless steel sheet installation unit in an embodiment (angle 1);

[0027] Figure 6 is a schematic diagram of a stainless steel sheet installation unit in the embodiment (angle 2);

[0028] Figure 7 Schematic diagram of a stainless steel sheet conveying platform in an embodiment;

[0029] Figure 8 This is a structural exploded view of the stainless steel sheet conveying platform in the embodiment;

[0030] Fig. 9 Schematic diagram of a stainless steel sheet in the embodiment;

[0031] Fig.10 Schematic diagram of the stainless steel sheet conveying platform and the first material distribution mechanism in the embodiment;

[0032] Fig.11 is a schematic diagram of a plastic base mounting unit in an embodiment;

[0033] Fig.12 is a schematic diagram of a plastic base in an embodiment;

[0034] Fig.13 Schematic diagram of a plastic base conveying platform in an embodiment;

[0035] Fig.14 is a structural exploded view of the plastic base conveying platform in the embodiment;

[0036] Fig.15 is a schematic diagram of the second protrusion and the first protrusion of the plastic base in the embodiment being respectively inserted and fitted into the third guide groove and the fourth guide groove;

[0037] Fig.16 Schematic diagram of the rotary positioning mechanism in the embodiment;

[0038] Fig.17 Schematic diagram of the plastic base conveying platform and the second material distribution mechanism in the embodiment;

[0039] Fig.18 is a schematic diagram of a first conveyor belt, a second conveyor belt, a second clamping jaw, and a third clamping jaw in an embodiment;

[0040] Fig.19 is a schematic diagram of a steel ball distributing device in an embodiment;

[0041] Fig. 20 It is a structural exploded view of the steel ball distributing device in the embodiment;

[0042] Fig.21 is a top view of the steel ball distributing device in the embodiment;

[0043] Fig. 22 yes Fig.21 Sectional view at the middle BB;

[0044] Fig.23 yes Fig. 22 A local enlarged view of the N position in the middle;

[0045] Fig.24 is a schematic diagram of the material distribution hole of the material distribution sliding block in the embodiment aligned with the lower end opening of the first conveying channel;

[0046] Fig.25 Schematic diagram of the material distribution hole of the material distribution sliding block in the embodiment being aligned with the material drop hole;

[0047] Fig.26 yes Fig.21 Sectional view at CC;

[0048] Fig. 27 1 is a three-dimensional schematic diagram of a steel ball detection device in an embodiment (angle 1);

[0049] Fig.28 1 is a three-dimensional schematic diagram of a steel ball detection device in an embodiment (angle 2);

[0050] Fig.29 yes Fig. 27 A partial enlarged view of point H in the middle. DETAILED DESCRIPTION

[0051] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0052] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0053] As a preferred embodiment of the present invention, an automatic assembly machine is provided for realizing automatic assembly of a motor assembly in a micro air pump, such as Figure 1As shown, the motor assembly of the micro air pump includes a motor 100, an optional stainless steel sheet 200, a plastic base 300 and an eccentric wheel 400, wherein the motor 100, the stainless steel sheet 200 and the plastic base 300 are fixedly connected together, and the eccentric wheel 400 is installed on the plastic base 300, and the rotation of the motor 100 drives the eccentric wheel 400 to rotate. The eccentric wheel 400 is used to connect with the swing rod of the micro air pump, and the rotation of the eccentric wheel 400 drives the swing rod to swing up and down to realize the air inlet and outlet of the micro air pump. Conventionally, a steel ball coated with lubricating oil is also installed in the eccentric wheel 400 to reduce the friction with the swing rod and improve the life of the air pump. The above-mentioned parts are all commonly used structures in micro air pumps. The automatic assembly machine provided in this embodiment automatically assembles the dispersed motor 100, stainless steel sheet 200, plastic base 300, eccentric wheel 400 and steel ball together, thereby greatly improving production efficiency and facilitating the subsequent installation of the rocker arm, pump housing, valve body, etc. of the micro air pump.

[0054] like Figure 2-4 As shown, the automatic assembly machine includes a rotating table 1, which is a platform that can rotate around its center point. Eight working positions are evenly arranged on the rotating table 1 around its rotation center, namely the first station 101, the second station 102, the third station 103, the fourth station 104, the fifth station 105, the sixth station 106, the seventh station 107 and the eighth station 108. A clamping seat 109 is fixedly arranged on each of the above stations for clamping the motor 100. The first station 101 is a feeding station, and the eighth station 108 is a material withdrawal station. The foolproof detection unit 2, the stainless steel sheet installation unit 3, the plastic base installation unit 4, the first automatic screw locking machine 5, the second automatic screw locking machine 6 and the conveying clamp 7 are 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 in sequence. The worker manually installs the motor 100 on the clamp 109 of the first station 101. Through the rotation of the rotating table 1, the motor 100 is sequentially transported to the foolproof detection unit 2, the stainless steel sheet installation unit 3, the plastic base installation unit 4, the first automatic screw locking machine 5, the second automatic screw locking machine 6 and the conveying clamp 7 for detection, assembly and transmission. The rotating table 1 is essentially a conveying mechanism for conveying parts to each process. In other embodiments, the rotating table 1 can be other conveying mechanisms, such as a conveyor belt, but this embodiment adopts the rotating table 1 and sequentially arranges the foolproof detection unit 2, the stainless steel sheet installation unit 3, the plastic base installation unit 4, the first automatic screw locking machine 5, the second automatic screw locking machine 6 and the conveying clamp 7 around the rotating table 1 through rotation, so that the rotation of the rotating table 1 can be used to transport parts between various processes, greatly reducing the floor space occupied by the automatic assembly machine.

[0055] The clamping seat 109 is provided with two side-by-side clamping positions 1091 for mounting the motor 100, so that two motor assemblies can be assembled at the same time. The fool-proof detection unit 2 is used to detect whether the motor 100 is correctly installed on the clamping seat 109. If the feeding position of the motor 100 is incorrect, the clamping position 1091 is marked in the electronic controller, and the subsequent working unit is controlled not to assemble the motor 100 on the clamping position 1091 until the motor 100 rotates to the eighth station 108, and the motor 100 is manually returned. The provision of the fool-proof detection unit 2 can avoid the problem of inaccurate position of the motor 100 due to human error during the manual feeding process, thereby improving the yield. The fool-proof detection unit 2 can be specifically implemented by a position sensor, such as a photoelectric sensor, an ultrasonic sensor, a Hall sensor, and the like.

[0056] After the motor 100 clamped on the clamping seat 109 passes through the foolproof detection unit 2, it reaches the third station 103 through the rotation of the rotating table 1. The stainless steel sheet installation unit 3 at the third station 103 is used to install the stainless steel sheet 200 on the motor 100. Figure 5-10 The stainless steel sheet installation unit 3 includes a stainless steel sheet conveying platform 301 and a stainless steel sheet clamp 302. The stainless steel sheet 200 is linearly transported on the stainless steel sheet conveying platform 301. Specifically, a conveying mechanism such as a vibrating plate or a conveyor belt can be used as a power source to push the stainless steel sheet 200 forward. Figure 7-8 The stainless steel sheet conveying platform 301 is provided with a first guide groove 303 and a second guide groove 304 extending linearly in the same direction. Fig. 9 The stainless steel sheet 200 includes a first main body 2001 in the form of a circular sheet, and a first ear portion 2002 and a second ear portion 2003 symmetrically connected to both ends of the first main body 2001. The first ear portion 2002 and the second ear portion 2003 both extend in the thickness direction of the first main body 2001, so that the stainless steel sheet 200 is in a "]" shape in side projection. The first main body 2001 is supported on the stainless steel sheet conveying platform 301, and the first ear portion 2002 and the second ear portion 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 forward along the extension direction of the first guide groove 303 and the second guide groove 304, and under the restriction of the first guide groove 303 and the second guide groove 304, the stainless steel sheet 200 cannot be deflected during the transmission process, thereby ensuring that the position and angle of the stainless steel sheet 200 do not change during the transmission process, so as to meet the subsequent automated grasping and assembly needs, thereby realizing automated assembly and greatly improving the assembly efficiency of the micro air pump.

[0057] Furthermore, 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 transmission process.

[0058] A sensor bracket 306 is also fixedly mounted on the stainless steel sheet conveying platform 301 for mounting a sensor (not shown, which may be a conventional photoelectric sensor) to detect the conveying position of the stainless steel sheet 200 and prevent the stainless steel sheet 200 from getting stuck on the stainless steel sheet conveying platform 301. Multiple sensors may be provided. For example, in this embodiment, a sensor 307 is further provided at the exit of the stainless steel sheet conveying platform 301 to detect whether the stainless steel sheet 200 is normally delivered. The provision of multiple sensors may increase the accuracy of detection and the reliability of the stainless steel sheet installation unit 3.

[0059] In other embodiments, the stainless steel sheet 200 can be in other shapes, as long as it has two guide matching parts, which are respectively inserted into the two guide grooves of the conveying platform to limit the deflection of the stainless steel sheet. In this embodiment, the first ear 2002 and the second ear 2003 of the stainless steel sheet 200 are themselves fixed brackets for fixing the micro air pump, and the first guide groove 303 and the second guide groove 304 are arranged to match the shapes of the first ear 2002 and the second ear 2003.

[0060] Continue reading Figure 5-6 The stainless steel sheet clamp 302 is arranged at the conveying outlet of the stainless steel sheet conveying platform 301, and is used to clamp the stainless steel sheet 200 and assemble the stainless steel sheet 200 onto the motor 100. In this embodiment, the stainless steel sheet clamp 302 is a conventional two-axis truss manipulator. Of course, in other embodiments, it can also be a manipulator with a higher degree of freedom.

[0061] Also, see Fig.10 In order to improve the efficiency of the transmission and assembly of the stainless steel sheet 200, the stainless steel sheet installation unit 3 further includes a first material distribution mechanism 308, which is arranged at the delivery outlet of the stainless steel sheet delivery platform 301. The first material distribution mechanism 308 can slide left and right at the delivery outlet of the stainless steel sheet delivery platform 301 under the drive of the cylinder (i.e., along the Fig.10The first material distribution mechanism 308 is provided with a first receiving position 3081 and a second receiving position 3082. Through the reciprocating motion of the first material distribution mechanism 308, the second receiving position 3082 is first 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. Then, the first material distribution mechanism 308 can receive two stainless steel sheets 200 from the delivery outlet of the stainless steel sheet delivery platform 301, and one stainless steel sheet 200 is received at one receiving position. In this way, the two clamping positions 1091 corresponding to the clamp seat 109 form the assembly positions of two stainless steel sheets 200, combined with Figure 6 As shown, the stainless steel sheet clamp 302 includes a first stainless steel sheet clamp 3021 and a second stainless steel sheet clamp 3022 (the second stainless steel sheet clamp 3022 is not drawn according to the actual situation, but is drawn as it is moving downward to prepare to clamp the stainless steel sheet 200 for reference), which are used to grab the stainless steel sheets 200 on the first receiving position 3081 and the second receiving position 3082 respectively. The first stainless steel sheet clamp 3021 and the second stainless steel sheet clamp 3022 simultaneously assemble the two stainless steel sheets 200 on the motor 100 on the two clamping positions 1091, forming a double-station assembly method, thereby improving assembly efficiency.

[0062] In this embodiment, the first material dividing mechanism 308 is reciprocatingly sliding, and in other embodiments it can also be reciprocatingly swinging, such as setting the material dividing mechanism to a perfect circular arc shape, with its arc edge close to the conveying outlet of the stainless steel sheet conveying platform 301, and forming multiple receiving positions to align with the conveying outlet of the stainless steel sheet conveying platform 301 in sequence.

[0063] The stainless steel sheet 200 is used as a fixing bracket to fix the micro air pump (for example, in one application, the stainless steel sheet 200 is used to fix the micro air pump inside the coffee machine), but the stainless steel sheet 200 is not necessary. According to customized needs, there are also solutions to fix the micro air pump using a micro air pump housing or other mounting structures. Therefore, in some specifications of micro air pumps, it is not necessary to install the stainless steel sheet 200. For such micro air pumps, when the motor assembly is automatically installed, it is only necessary to ignore the stainless steel sheet installation unit 3 and set the stainless steel sheet installation unit 3 to a non-working state.

[0064] After the installation process is completed 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 rotating table 1, and the plastic base 300 is assembled by the plastic base installation unit 4. Figure 11-17The plastic base installation unit 4 includes a plastic base conveying platform 401 and a plastic base clamp 402. The plastic base 300 is linearly transported on the plastic base conveying platform 401. Specifically, a conveying mechanism such as a vibration plate or a conveyor belt can be used as a power source to push the plastic base 300 forward.

[0065] like Fig.12 The plastic base 300 in this embodiment includes a cylindrical second body 3001, and a first boss 3002 and a second boss 3003 respectively located on the two end surfaces of the second body 3001, wherein the first boss 3002 is used for positioning the plastic base 300 and the motor, and the second boss 3003 is used for inserting screws to lock and fix the plastic base 300 and the motor.

[0066] like Figure 13-15 The plastic base conveying platform 401 includes a base 4011 with a roughly U-shaped cross-section and a second height limiting plate 4012 and a third height limiting plate 4013 fixedly mounted on the base 4011. The base 4011, the second height limiting plate 4012 and the third height limiting plate 4013 enclose a conveying channel that roughly matches the shape of the plastic base 300. The second height limiting plate 4012 and the third height limiting plate 4013 limit the movement of the plastic base 300 in the height direction. A third guide groove 4013 and a fourth guide groove 4014 which linearly extend in the conveying direction of the plastic base 300 are respectively provided on the base 4011 and the second height limiting plate 4012. The second body 3001 of the plastic base 300 is supported on the plastic base conveying platform 401. The second boss 3003 and the first boss 3002 are respectively inserted and fitted in the third guide groove 4013 and the fourth guide groove 4014, so that the plastic base 300 can only be conveyed forward along the extension direction of the third guide groove 4013 and the fourth guide groove 4014. Under the restriction of the third guide groove 4013 and the fourth guide groove 4014, the plastic base 300 cannot be deflected during the transmission process, thereby ensuring that the position and angle of the plastic base 300 do not change during the transmission process and will not tip over, so as to meet the subsequent automated grasping and assembly needs, thereby realizing automated assembly and greatly improving the assembly efficiency of the micro air pump.

[0067] A sensor bracket 4015 is also fixedly mounted on the plastic base conveying platform 401 for mounting a sensor (not shown, which may be a conventional photoelectric sensor) to detect the conveying position of the plastic base 300 and prevent the plastic base 300 from getting stuck on the plastic base conveying platform 401. Providing multiple sensors can increase the accuracy of detection and the reliability of the automatic conveying device.

[0068] Since the positions of the first convex column 3002 and the second convex column 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 still subject to certain restrictions. In some occasions, the angle of the plastic base 300 outputted by the plastic base conveying platform 401 cannot meet the requirements of automated assembly. Fig.11 and Fig.16 As shown, the plastic base installation unit 4 also includes a rotation adjustment mechanism 403, which includes a rotating seat 4031 driven to rotate by a driving device (such as a rotating cylinder), and the plastic base clamping jaws 402 include a first group of plastic base clamping jaws 4021 located relatively in front of the plastic base 300 in the conveying direction and a second group of plastic base clamping jaws 4022 located relatively behind the plastic base 300 in the conveying direction. After the plastic base 300 is output through the plastic base conveying platform 401, the second group of plastic base clamping jaws 4022 grabs and installs it on the rotation adjustment mechanism 403 to adjust the placement angle, that is, the plastic base 300 is grabbed onto the rotating seat 4031, and the rotating seat 4031 drives the plastic base 300 to rotate so that the angle of the plastic base 300 meets the assembly requirements, and then the first group of plastic base clamping jaws 4021 assembles the plastic base 300 with the adjusted angle onto the motor located on the assembly position 5. By providing the rotation adjustment mechanism 403, the angle of the plastic base 300 is further adjusted to compensate for the angle of the plastic base 300 that is restricted in order to cooperate with the third guide groove 4013 and the fourth guide groove 4014, thereby improving the flexibility and applicability of the device.

[0069] The clamping position 1091 on the fourth station 104 and the rotary positioning mechanism 403 of the plastic base installation unit 4 are both arranged 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 jaws 4021 and the second group of plastic base clamping jaws 4022 can be synchronously operated, that is:

[0070] 1. When the first set of plastic base clamping jaws 4021 is located above the rotating positioning mechanism 403, the second set of plastic base clamping jaws 4022 is located just above the output port of the plastic base conveying platform 401;

[0071] 2. When the first set of plastic base clamping jaws 4021 downwardly grasp the previous plastic base 300 on the rotating base 4031, the second set of plastic base clamping jaws 4022 also downwardly grasp the next plastic base 300 at the output port of the plastic base conveying platform 401;

[0072] 3. When the first set of plastic base clamping jaws 4021 are translated to above the clamping position 109, the second set of plastic base clamping jaws 4022 are translated to above the rotating adjustment mechanism 403;

[0073] 4. When the first set of plastic base clamping jaws 4021 assembles the previous plastic base 300 downward onto the stainless steel sheet 200 on the clamping position 1091 , the second set of plastic base clamping jaws 4022 also downwardly places the next plastic base 300 onto the rotating seat 4031 .

[0074] Therefore, the first group of plastic base clamps 4021 and the second group of plastic base clamps 4022 can be uniformly controlled by a sliding guide mechanism for their translation in the conveying direction of the plastic base 300, and can also be uniformly controlled by a driving device for the up and down movement and grasping action of the two groups of clamps, thereby achieving synchronous action, reducing machine costs, and improving transmission efficiency.

[0075] Also, see Fig.17 In order to improve the efficiency of transporting and assembling the plastic base 300, the plastic base installation unit 4 further includes a second material distribution mechanism 404, which is arranged at the delivery outlet of the plastic base delivery platform 401. The second material distribution mechanism 404 can slide left and right at the delivery outlet of the plastic base delivery platform 401 under the drive of the cylinder (i.e., along the Fig.17 The second material dividing mechanism 404 is provided with two receiving positions for the plastic base 300. Through the reciprocating motion of the second material dividing mechanism 404, one of the receiving positions is first aligned with the delivery outlet of the plastic base delivery platform 401 to receive the first plastic base 300, and then the other receiving position is aligned with the delivery outlet of the plastic base delivery platform 401 to receive the second plastic base 300. Then, the second material dividing mechanism 404 can receive two plastic bases 300 from the delivery outlet of the plastic base delivery platform 401, and one plastic base 300 is received at one receiving position respectively. In this way, two assembly stations for the plastic bases 300 are formed. Combined with Fig.11As shown, the first group of plastic base clamps 4021 includes a first plastic base clamp 40211 and a second plastic base clamp 40212 (the second plastic base clamp 40212 is not drawn according to the actual situation, but is drawn as it is moving downward to clamp the plastic base 300 for reference), and the second group of plastic base clamps 4022 includes a third plastic base clamp 40221 and a fourth plastic base clamp 40222 (the third plastic base clamp 40221 is not drawn according to the actual situation, but is drawn as it is moving downward to clamp the plastic base 300 for reference), and the two clamps on the two groups of clamps correspond to the two receiving positions on the second material dividing mechanism 404, respectively, and cooperate with the two clamping positions 1091 on the clamping base 109 to simultaneously transfer and assemble the two plastic bases 300, forming a double-station assembly method, thereby improving assembly efficiency.

[0076] In this embodiment, the second material distribution mechanism 404 is reciprocatingly sliding, and in other embodiments it can also be reciprocatingly swinging, such as setting the material distribution mechanism to a perfect circular arc shape, with its arc edge close to the delivery outlet of the plastic base delivery platform 401, and forming multiple receiving positions to align with the delivery outlet of the plastic base delivery platform 401 in sequence.

[0077] After passing 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. Therefore, the first automatic screw locking machine 5 on the fifth station 105 and the second automatic screw locking machine 6 on the sixth station 106 respectively lock and fix the plastic base 300 and the motor 100 together at two screw locking positions, 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 are transferred to the seventh station 107, and the first clamp 7 transfers them to the first conveyor belt 8.

[0078] like Fig.18 The first conveyor belt 8 transports the motor 100, the stainless steel sheet 200 and the plastic base 300 assembled as one in a vertical state forward, ensuring that the plastic base 300 is set upward to facilitate the installation of the eccentric wheel 400.

[0079] Before installing the eccentric wheel 400, the steel balls need to be assembled on the eccentric wheel 400, so the automatic assembly machine also includes a steel ball distribution device 9, see Figure 19-26The steel ball distributing device 9 includes a base 91 and a slide 92 and a base 93 fixedly connected to the base 91. A steel ball bottle 94 for storing steel balls is fixedly connected to the upper end of the base 93 and extends into the interior of the base 93. The lower end of the steel ball bottle 94 is open. A first conveying channel 99 is provided at the lower end of the steel ball bottle 94 in the base 93 downward along the gravity direction. The diameter of the first conveying channel 99 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 99 from top to bottom along the gravity direction. A slideway 910 perpendicular to the first conveying channel 99 is provided on the base 93 at the outlet 9, and a dividing slider 95 is slidably connected in the slideway and slides back and forth along the slideway 910. The dividing slider 95 is provided with a dividing hole 951 for accommodating a single steel ball. When the dividing slider 95 slides, the dividing hole 951 is aligned with the lower outlet of the first conveying channel 99, so that the single steel ball falls into the dividing hole 951, and the dividing slider 95 continues to slide, pushing the single steel ball to move in the slideway 910, thereby realizing the dividing of the steel balls.

[0080] Continue reading Fig.23 A material drop hole 921 is provided on the slideway 910, and a second conveying channel 911 is connected to the lower end of the material drop hole 921 downward along the gravity direction. Fig.23 , 24 25. In a working process, the dividing slider 95 first moves back to align the dividing hole 951 with the lower end outlet of the first conveying channel 99, and a single steel ball falls into the dividing hole 951, and then moves forward to push the single steel ball to move in the slide 10, and finally the steel ball enters the dropping hole 921 and is conveyed downward along the second conveying channel 911.

[0081] By using the steel ball distribution device provided in this embodiment, the automation of individual distribution of steel balls is realized. The eccentric wheel 400 is transported below the second conveying channel 911, and the steel balls are put into the eccentric wheel 400 through the second conveying channel 911 by gravity.

[0082] Since the steel balls are magnetic and are easily stained with oil during transportation, they may get stuck in the lower outlet of the first conveying channel 99 or the drop hole 921 during transportation of the material distribution slide 95. Therefore, in order to further improve the reliability of the steel ball distribution device and reduce the failure rate, this embodiment is also provided with a blowing device to assist the steel balls to fall from the first conveying channel 99 or the drop hole 921. Fig.23 As shown, a first gas channel 922 extending in the direction of gravity is opened above the drop hole 921, and gas is introduced into the first gas channel 922 through a blowing device (not shown, for example, a nitrogen gas source connected to an external gas pipe) to blow gas toward the drop hole 921, thereby assisting the steel ball to fall from the drop hole 921. Fig.26A second gas channel 923 connected to the first delivery channel 99 may also be opened on the base 93, and gas may be introduced into the second gas channel 923 through a blowing device to blow air downward along the first delivery channel 99 to assist the auxiliary steel balls to fall from the first delivery channel 99.

[0083] In this embodiment, a first gas channel 922 and a second gas channel 923 are provided to connect to the blanking hole 921 and the first conveying channel 99 respectively, so as to improve the gas guiding effect. In other embodiments, the blowing device can also be directly provided above the blanking hole 921 or the first conveying channel 99 to blow air thereto.

[0084] The various passages in this embodiment, such as a conveying channel 9, a slide 910, a blanking hole 921, a first gas channel 922, and a second gas channel 923 are formed in the base 93, but in other embodiments, a tubular pipeline structure can also be used instead.

[0085] See also Fig. 22 A Hall sensor 912 is also provided outside the second conveying channel 911 to sense whether the steel ball passes smoothly. When a problem occurs during the detection, the device can be quickly stopped for maintenance. In other embodiments, the Hall sensor 912 can also be other sensing devices, such as a photoelectric sensor.

[0086] The lower end of the second conveying channel 911 is a gradually shrinking conical structure to guide the discharge position of the steel balls and improve the accuracy of the steel balls being put into the eccentric wheel 400.

[0087] In this embodiment, the material dividing slide block 95 is driven to slide by a cylinder 96, and the cylinder 96 can also be replaced by other driving devices, such as a motor or an oil cylinder.

[0088] In this embodiment, the first conveying channel 99 and the second conveying channel 911 extend vertically downward along the direction of gravity, but in other embodiments, they may also extend obliquely downward without affecting the conveying effect of the steel balls.

[0089] To further improve yield, refer to Figure 27-29 As shown, this embodiment is further provided with a steel ball detection device 13 for detecting whether the steel balls are put into the blind hole 4001 on the eccentric wheel 400. Several eccentric wheels 400 can be transported on the conveying device 131, and the steel balls are put into the blind hole 4001 through the steel ball distributor 9. The steel ball detection device is arranged downstream of the steel ball distributor 9 to detect each eccentric wheel 400, forming an assembly line working mode to improve efficiency.

[0090] The steel ball detection device includes a moving block 134, which is fixedly connected to the guide rod of the cylinder 133, and is driven by the cylinder 133 to move, and has a moving stroke relatively away from or close to the blind hole 4001. The moving direction of the moving block 134 is along the axial direction of the blind hole 4001. A probe 135 is installed on the moving block 134, and the arrangement direction of the probe 135 is also along the axial direction of the blind hole 4001. The probe 135 includes a head 1351, a tail 1353, and a shaft 1352 located between the head 1351 and the tail 1353. The moving block 134 is provided with a guide hole (not shown) opened along its moving direction, and the shaft 1352 extends through the guide hole, so that the probe 135 is slidably connected to the moving block 134. A compression spring 136 is further provided between the probe 135 and the moving block 134. Specifically, the shaft 1352 has an expanded diameter portion 13521 near the tail portion 1353. One end of the compression 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 applies pressure to the compression spring 136 and causes the compression spring 136 to produce elastic deformation. The compression spring 136 transmits pressure to the probe 135, thereby driving the probe 135 to move toward the blind hole 4001. The probe 135 extends into the blind hole 4001 to measure the depth of the blind hole 4001.

[0091] When the probe 135 extends into the blind hole 4001, depending on whether the steel ball is missing, the probe 135 either contacts the bottom of the blind hole 4001 or contacts the steel ball in the blind hole 4001. Therefore, depending on whether the steel ball is missing, the probe 135 has two different lengths of travel. In addition, it should be noted that in the present embodiment, the travel of the moving block 134 is fixed, that is, it is pre-set and does not change. Then, depending on whether the steel ball is missing, the moving block 134 and the probe 135 have two different distance differences. For example, when there is a steel ball in the blind hole 4001, the distance between the head 1351 and the moving block 134 is far, and when there is no steel ball in the blind hole 4001, the distance between the head 1351 and the moving block 134 is close. According to this distance change, it is possible to determine whether the steel ball is missing by setting a sensing device.

[0092] In this embodiment, the sensing device is a through-beam photoelectric sensor, wherein two parallel protrusions 1341 and 1342 are provided on the moving block 134, and the head 1351 extends between the protrusions 1341 and 1342. The receiving end and the transmitting end of the through-beam photoelectric sensor are respectively arranged on the inner sides of the protrusions 1341 and 1342, and a slit 137 is provided on the head 1351. When there is a steel ball in the blind hole 4001, the light signal emitted by the transmitting end of the through-beam photoelectric sensor can just pass through the slit 137 and be received by the receiving end to generate a judgment signal.

[0093] In addition, in other embodiments, other sensing devices that can generate signals according to the distance of the position can also be selected, such as reflective photoelectric sensors, Hall sensors, micro switches, etc.

[0094] When the moving member 4 moves away from the blind hole 4001, the compression spring 136 drives the probe 135 to reset with its elastic restoring force, 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 will always contact the hole end of the guide hole on the moving block 134, thereby ensuring that the relative distance between the moving block 134 and the probe 135 remains unchanged. The compression spring 136 can also be replaced by other elastic members, such as springs.

[0095] After checking that the steel ball is indeed installed in the eccentric wheel 400, the eccentric wheel 400 continues to be transported forward, and the oiler 10 injects oil into the blind hole 4001 to lubricate the steel ball, reduce the friction between the steel ball and the rocker, and increase the life of the air pump.

[0096] Next, the eccentric wheel 400 is sucked and assembled on the plastic base 300 on the first conveyor belt 8 by the vacuum suction nozzle 14 that moves on two axes. At this point, the assembly of the motor assembly is completed. In other embodiments, the vacuum suction nozzle 14 can also be other assembly mechanisms, such as a clamp. The use of the vacuum suction nozzle 14 can effectively ensure the suction and installation of the eccentric wheel 400 of a smaller size, thereby improving reliability.

[0097] In this embodiment, the vacuum suction nozzle 14, the conveying device 131 and the steel ball distributor 9 are all used to install the eccentric wheel and the steel balls, and are therefore collectively referred to as an eccentric wheel installation unit.

[0098] A second clamp 15 and a third clamp 16 are provided at the end of the first conveyor belt 8. The second clamp 15 clamps the motor assembly onto the third clamp 16. The third clamp 16 swings to place the motor assembly in a flat position on the second conveyor belt 8 for transmission, so as to prevent the motor assembly from falling in a vertical state and damaging the motor pins.

[0099] The automatic assembly machine of this embodiment can obviously control the working order of each working unit through electrical control technology, and cooperate with sensors and transmission mechanisms to control the transportation and assembly of parts.

[0100] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims will fall within the scope of protection of the present invention.

Claims

1. An automatic assembly machine for automatically assembling a motor assembly in a micro air pump, the motor assembly comprising at least a motor, a plastic base, an eccentric wheel and a steel ball, characterized in that: It includes a clamp, 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 installation unit conveys the plastic base and installs the plastic base on the motor, and the automatic screw locking machine is used to screw the plastic base and the motor together. The eccentric wheel installation unit includes an eccentric wheel conveying device, a steel ball distributing device and an eccentric wheel assembly mechanism. The eccentric wheel conveying device is used to convey the eccentric wheel. The steel ball distributing device is arranged above the eccentric wheel conveying device. The steel ball distributing device separates a single steel ball and puts the steel ball into the eccentric wheel for assembly. The eccentric wheel assembly mechanism picks up the eccentric wheel and assembles the eccentric wheel on the plastic base. The motor assembly further includes a stainless steel sheet, and the automatic assembly machine further includes a stainless steel sheet installation unit, wherein the stainless steel sheet installation unit conveys the stainless steel sheet and places the stainless steel sheet on the motor, and the plastic base is then stacked on the stainless steel sheet, and the plastic base and the motor screw are fixed by an automatic screw locking machine, so that the stainless steel sheet is pressed and fixed between the plastic base and the motor screw; The stainless steel sheet installation unit comprises a stainless steel sheet conveying platform, the stainless steel sheet is linearly transported on the stainless steel sheet conveying platform, a first guide groove and a second guide groove extending linearly in the same direction are provided on the stainless steel sheet conveying platform, the stainless steel sheet comprises a first main body in the shape of a circular sheet and a first ear portion and a second ear portion, the first ear portion and the second ear portion are respectively inserted and fitted in the first guide groove and the second guide groove, so that the first guide groove and the second guide groove restrict the stainless steel sheet from being transported along the extension direction of the first guide groove and the second guide groove without deflection; The first ear portion and the second ear portion both extend along a thickness direction of the first body.

2. The automatic assembly machine according to claim 1, characterized in that: It also includes a rotating table, the clamping seat is fixedly installed on the rotating table, the stainless steel sheet installation unit, the plastic base installation unit, and the automatic screw locking machine are sequentially arranged around the rotating table, and the rotating table sequentially transmits the clamping seat to the stainless steel sheet installation unit, the plastic base installation unit and the automatic screw locking machine through its rotation to respectively perform the installation of the stainless steel sheet, the installation of the plastic base, and the screw locking fixation of the plastic base and the motor.

3. The automatic assembly machine according to claim 2, characterized in that: It also includes a first clamp and a first conveyor belt, wherein the first clamp 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 the position of the eccentric wheel installation unit to install the eccentric wheel.

4. The automatic assembly machine according to claim 3, characterized in that: It also includes a second clamp, a third clamp and a second conveyor belt. The second clamp clamps the assembled motor assembly onto the third clamp, and the third clamp swings to place the motor assembly in a flat position on the second conveyor belt and transmits it out of the automatic assembly machine.

5. The automatic assembly machine according to claim 1, characterized in that: It also includes a foolproof detection unit, which detects whether the motor is correctly installed on the clamping seat and feeds back a detection signal to control whether the motor is subsequently assembled.

6. The automatic assembly machine according to claim 1, characterized in that: The stainless steel sheet installation unit also includes a stainless steel sheet clamping claw, which is arranged at the conveying outlet of the stainless steel sheet conveying platform and is used to clamp the stainless steel sheet and place the stainless steel sheet on the motor.

7. The automatic assembly machine according to claim 1, characterized in that: The plastic base installation unit includes a plastic base conveying platform and a plastic base clamping claw. The plastic base is linearly transmitted on the plastic base conveying platform. The plastic base conveying platform is provided with a third guide groove and a fourth guide groove extending linearly in the same direction. The plastic base includes a cylindrical second body, and a first boss for mounting and positioning between the plastic base and the motor and a second boss for inserting screws to lock and fix the plastic base and the motor. The first boss and the second boss are respectively located on the two end surfaces of the second body. The first boss and the second boss 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 without deflection along the extension direction of the third guide groove and the fourth guide groove. The plastic base clamping claw is arranged at the conveying outlet of the plastic base conveying platform, and also includes a rotary positioning mechanism. The plastic base clamping claw grabs the plastic base and places the plastic base on the rotary positioning mechanism. The placement angle of the plastic base is adjusted by rotating the rotary positioning mechanism. The plastic base clamping claw then clamps the plastic base and places it on the motor.

8. The automatic assembly machine according to claim 1, characterized in that: The steel ball distributing device includes a storage container for storing a plurality of steel balls, wherein the storage container is provided with a first conveying channel extending downward at its lower end in the gravity direction, the aperture of the first conveying channel is slightly larger than the outer diameter of the steel balls, a slide is provided at the outlet of the first conveying channel, a distributing slider which slides back and forth along the slide is slidably connected in the slide, a distributing hole for accommodating a single steel ball is provided on the distributing slider, the distributing slider slides so as to align the distributing hole with the lower outlet of the first conveying channel, so that a single steel ball falls into the distributing hole, the distributing slider pushes the single steel ball to move in the slide, a drop hole is provided on the slide, a second conveying channel extending downward is connected to the lower end of the drop hole, and the single steel ball enters the second conveying channel from the drop hole under the push of the distributing slider for downward transportation and is put into the eccentric wheel.

9. The automatic assembly machine according to claim 1, characterized in that: It also includes a steel ball detection device for detecting whether a steel ball is put into an eccentric wheel, the eccentric wheel having a blind hole for accommodating the steel ball, the steel ball detection device including 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 relatively approach or move away from the blind hole, the probe can slidably extend through the moving part, one end of the elastic part acts on the moving part, and the other end acts on the probe, when the moving part moves toward the blind hole, pressure is applied to the elastic part and the elastic part is elastically deformed, the elastic part transmits pressure to the probe, thereby driving the probe to move toward the blind hole, the probe is inserted into the blind hole to measure the depth of the blind hole, according to the depth of the blind hole, the probe and the moving driving device with a fixed stroke form different distance differences, and the sensing device detects whether the steel ball is put into the blind hole according to the different distance differences.

10. The automatic assembly machine according to claim 9, characterized in that: The probe includes a head, a tail and a rod body located between the head and the tail. The movable part has a guide hole opened toward the blind hole. The rod body can be slidably fitted in the guide hole. The tail extends into the blind hole to measure the depth of the blind hole. The sensing device is a through-beam photoelectric sensor fixedly connected to the movable part. The head is arranged between the transmitting end and the receiving end of the through-beam photoelectric sensor. A slit is provided on the head. The light signal emitted by the transmitting end can pass through the slit to detect the distance difference between the movable part and the probe, thereby detecting whether the object is put into the blind hole.

11. The automatic assembly machine according to claim 1, characterized in that: It also includes an oiler, which injects oil into the steel balls in the eccentric wheel to lubricate the steel balls.

12. The automatic assembly machine according to claim 1, characterized in that: The eccentric wheel assembly mechanism is a vacuum suction nozzle.

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