Intelligent electric meter NB module testing device

Abstract

The application belongs to the technical field of smart meter NB module testing, in particular to a smart meter NB module testing device, which comprises a rack, two groups of transmission shafts are rotatably installed in the rack, a conveying belt mechanism is arranged at the bottom of the rack, chain wheels are arranged at both ends of the transmission shafts, two groups of chains are engaged with the two groups of chain wheels respectively, a plurality of groups of bases are distributed between the two groups of chains, a material placing rack for placing NB modules is arranged on the bases, a detection mechanism is arranged on the rack, a guide frame is arranged between the two groups of transmission shafts, the guide frame is rotatably connected with the transmission shafts at the end portions, the detection mechanism comprises two groups of guide columns which are fixedly installed on the rack, the material placing rack is driven to make circular motion, automatic feeding and discharging of the NB modules is realized, the automation rate of the device is improved, the time wasted in taking and placing the NB modules is saved, and the testing efficiency of the NB modules is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of testing NB modules for smart electricity meters, and specifically relates to a testing device for NB modules of smart electricity meters. Background Art

[0002] Testing of PCBA boards of NB modules for smart electricity meters: First, visually inspect welding spots and missing components, and use ICT to test open circuits, short circuits and values of resistors and capacitors; then download NB-IOT firmware and calibrate clock and power; connect three-phase power supply and load, and verify voltage stabilization, ripple, overvoltage and overcurrent protection item by item; use a radio frequency instrument to test transmission power, sensitivity and bit error rate; perform four cycles of aging at high and low temperatures between -40~85°C; finally, operate the complete machine with load for seven days, record data, and the product is judged as qualified if the failure rate is ≤0.1%.

[0003] The patent with publication number CN216310256U discloses a testing device for NB modules of three-phase electricity meters, comprising a bottom box, wherein a positioning area is provided on the front side of the upper surface of the bottom box, and a control area is provided on the rear side of the bottom box; the positioning area comprises an M-shaped positioning block and an L-shaped positioning block, and the control area comprises a vertical plate, a clamping device, a side plate, a linear optical shaft, a needle plate, a probe and a needle sleeve. In this solution, the M-shaped positioning block and the L-shaped positioning block enclose the NB module of the three-phase electricity meter, which facilitates accurate placement of the NB module of the three-phase electricity meter; the L-shaped movable member facilitates taking off the NB module of the three-phase electricity meter after testing; the tooling is provided with four identical test stations, the needle plate is provided with a U-shaped groove, the L-shaped movable member is located below the U-shaped groove, and driven by the clamping device, four groups of probes can simultaneously contact four three-phase NB modules, thereby improving testing efficiency.

[0004] In the above solution, before testing the NB module, it is necessary to place the NB module between the M-shaped positioning block and the L-shaped positioning block, and insert the pins on the NB module into the female header. After the testing of the NB module is completed, the NB module needs to be taken off. This picking and placing mode of the NB module results in low automation rate of the whole device, and additionally, picking and placing the NB module wastes a lot of time and reduces the testing efficiency of NB modules. Therefore, the present invention provides a testing device for NB modules of smart electricity meters. Summary of the Invention

[0005] To overcome the deficiencies in the prior art and solve at least one technical problem mentioned in the background art.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: A smart meter NB module testing device includes a frame, with two sets of drive shafts rotatably mounted inside the frame. A conveyor belt mechanism is provided at the bottom of the frame. Both ends of the drive shafts are equipped with sprockets, and the two sets of sprockets respectively mesh with two sets of chains. Several sets of bases are distributed between the two sets of chains, and a feeding rack for placing NB modules is provided on the base. A detection mechanism is provided on the frame. A guide frame is provided between the two sets of drive shafts, and the end of the guide frame is rotatably connected to the drive shaft. The detection mechanism includes two sets of guide posts, which are fixedly mounted on the frame. One end of a movable plate is slidably connected to the two sets of guide posts. A probe is fixedly mounted on the other end of the movable plate. A first cylinder is fixedly mounted on one side of the frame to drive the movable plate. A nut is located below the probe, and a second cylinder is fixedly mounted on the guide frame to drive the nut. By driving the feeding rack to perform circular motion, automatic loading and unloading of NB modules is achieved, which not only improves the automation rate of the device but also saves the time wasted on picking up and placing NB modules, thus improving the testing efficiency of NB modules.

[0007] Preferably, the feeding rack includes a feeding seat, which is mounted on a base. A feeding slot for placing NB modules is opened on the feeding seat. A movable block is movably mounted on the feeding seat. A rubber block is fixedly mounted on the end of the movable block. A receiving block is movably mounted inside the movable block. A movable rod is fixedly connected to the lower end of the receiving block. A third spring is sleeved on the movable rod. A roller is rotatably mounted on the lower end of the movable rod. The roller is rotatably connected to the outer ring of the guide frame. The outer ring of the guide frame is composed of a first annular surface, a first inclined surface, and a second annular surface. A movable slot is opened on the feeding seat. The movable block is slidably connected to the movable slot. Inclined slots are opened on both sides inside the movable block. A pin is fixedly mounted on the receiving block. The two ends of the pin are respectively located in the two sets of inclined slots. Under the rebound force of the third spring, the rubber block is released from squeezing the NB module. Under the action of gravity, the NB module will automatically fall onto the conveyor belt mechanism. Since the NB module is relatively close to the conveyor belt mechanism, the NB module falls onto the conveyor belt mechanism in a straight line and neatly, avoiding any impact on the further processing efficiency of the NB module.

[0008] Preferably, the base includes a seat body, with two sets of chains connected to both ends of the seat body, two sets of slide rods symmetrically installed inside the seat body, two sets of limiting mechanisms symmetrically distributed on both sides of the seat body, and a first spring sleeved on the end of the slide rod. One end of the first spring is fixedly connected to the inner wall of the seat body, and the other end of the first spring is fixedly connected to a feeding seat. The feeding seat has two sets of through holes symmetrically opened, and the two sets of through holes are slidably connected to the two sets of slide rods respectively. The limiting mechanism includes two sets of limiting blocks, which are fixedly installed inside the seat body, and a guide rail is disposed between the two sets of limiting blocks. The unlocking block is fixedly installed in the seat and slidably connected to the guide rail. Both sides of the feeding seat are equipped with a locking mechanism. The locking mechanism includes a fixed arm, one end of which is fixedly connected to the feeding seat. A locking block is movably inserted into the other end of the fixed arm and is used to lock the limiting block. A second spring is set in the other end of the fixed arm. A pressure rod is set on the feeding seat. A third cylinder for pushing the pressure rod is fixedly installed on one side of the upper end of the frame. An unlocking plate is fixedly installed on one side of the upper end of the frame. A second inclined surface for pushing the pressure rod a second time is set on the unlocking plate. Under the action of the first spring's rebound force, the end of the locking block is locked between the unlocking block and the limiting block, thereby limiting the feeding seat. At this time, the feeding seat corresponding to the defective product is not on the same circumference as other feeding seats, which makes it easier for staff to classify defective products and good products.

[0009] The beneficial effects of this invention are as follows: 1. By driving the feeding rack to make circular motion, the automatic loading and unloading of NB modules is realized, which not only improves the automation rate of the device, but also saves the time wasted in picking up and placing NB modules, and improves the testing efficiency of NB modules.

[0010] 2. After testing, the NB module continues its circular motion along the feeding rack. Simultaneously, the rollers on the feeding rack roll along the first annular surface and are pushed by the first inclined surface, causing the rollers to move the movable rod upwards. The movable rod compresses the third spring, and the movable rod drives the pin, causing the pin end to slide along the inclined groove. Guided by the inclined groove, the movable block, along with the rubber block, moves along the movable groove towards the NB module until the rubber block presses against the NB module, and the rollers roll onto the second annular surface, thus fixing the NB module within the feeding groove. As the NB module performs circular motion, it moves to the lower end of the entire device along with the corresponding feeding rack. At this point, the NB module is close to the conveyor belt on the conveyor belt mechanism, and the roller will roll from the second annular surface to the first annular surface. Under the rebound force of the third spring, the rubber block is released from squeezing the NB module. Under the action of gravity, the NB module will automatically fall onto the conveyor belt mechanism. Because the NB module is relatively close to the conveyor belt mechanism, it falls onto the conveyor belt mechanism in a straight line and neatly, avoiding any impact on the further processing efficiency of the NB module.

[0011] 3. When the tested NB module is defective, first retract the socket and probe. Then, push the pressure rod with the third cylinder. The pressure rod moves the feeding seat along with the NB module. The through hole on the feeding seat slides along the corresponding slide rod, and the feeding seat stretches the two sets of first springs. At the same time, the two sets of locking mechanisms move together with the feeding seat. During the movement, the end of the locking block on the locking mechanism is squeezed by the inclined surface on the limiting block, causing the locking block to move inward toward the other end of the fixed arm. The locking block compresses the second spring until the end of the locking block is misaligned with the inclined surface on the limiting block. Simultaneously, the end of the locking block pushes the unlocking block, causing the end of the unlocking block to disengage from the limiting blocks, thus unlocking the module. The block slides along the guide rail until the locking block is offset from the two sets of limit blocks. Under the action of the first spring rebound force, the end of the locking block is locked between the unlocking block and the limit block, thereby limiting the feeding seat. At this time, the feeding seat corresponding to the defective product is not on the same circumference as other feeding seats. When the feeding seat corresponding to the defective product moves to the lower end of the entire device, the roller on the feeding seat rolls from the second annular surface to the first annular surface, and the defective NB module will fall onto the conveyor belt mechanism. At this time, the defective NB module is not on the same line as other good NB modules and is distributed on the conveyor belt mechanism, which makes it easier for the staff to classify defective products and good products. Attached Figure Description

[0012] The invention will now be further described with reference to the accompanying drawings.

[0013] Figure 1 This is a partial schematic diagram of the structure of the present invention.

[0014] Figure 2 This is a cross-sectional view of the assembly of the frame, drive shaft, sprocket, chain, base, feeding rack, and detection mechanism of the present invention.

[0015] Figure 3 This is a schematic diagram of the base, feeding rack, NB module, probe, and header assembly of the present invention.

[0016] Figure 4 This is a schematic diagram of the combination of the base, feeding rack, and NB module of the present invention.

[0017] Figure 5 This is a cross-sectional view of the base and NB module assembly of the present invention.

[0018] Figure 6 This is a schematic diagram of the base assembly of the present invention.

[0019] Figure 7 This is a cross-sectional view of the assembly of the frame, conveyor belt mechanism, drive shaft, chain, base, feeding rack, detection mechanism, and guide frame of the present invention.

[0020] Figure 8 This is a schematic diagram of the combination of the base and the feeding rack of the present invention.

[0021] Figure 9 This is a schematic diagram of the combination of the limiting mechanism and the locking mechanism of the present invention.

[0022] Figure 10 This is a schematic diagram of the overall structure of the present invention.

[0023] In the diagram: 1. Frame; 101. Third cylinder; 102. Unlocking plate; 103. Second inclined plane; 2. Conveyor belt mechanism; 3. Drive shaft; 4. Sprockets; 5. Chain; 6. Feeding rack; 601. Feeding seat; 6011. Movable groove; 6012. Through hole; 602. Feeding groove; 603. Movable block; 6031. Inclined groove; 604. Rubber block; 605. Third spring; 606. Movable rod; 607. Receiving block; 6071. Pin; 608. Roller; 609. Locking mechanism; 6091. Fixed arm; 6092. Locking block; 6093. Second spring; 610. Pressure rod; 7. Base; 701. Seat body; 702. Slide rod; 703. Limiting mechanism; 7031. Limiting block; 7032. Unlocking block; 7033. Guide rail; 704. First spring; 8. Testing mechanism; 801. Guide post; 802. Movable plate; 803. First cylinder; 804. Probe; 805. Nut header; 806. Second cylinder; 9. Guide frame; 901. First annular surface; 902. First inclined surface; 903. Second annular surface; 10. NB module. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] Example 1: As Figures 1 to 3As shown in the embodiment of the present invention, a smart meter NB module testing device includes a frame 1, two sets of drive shafts 3 are rotatably installed inside the frame 1, a conveyor belt mechanism 2 is provided at the bottom of the frame 1, sprockets 4 are provided at both ends of the drive shafts 3, the two sets of sprockets 4 respectively mesh with two sets of chains 5, and several sets of bases 7 are distributed between the two sets of chains 5. A feeding rack 6 for placing NB modules 10 is provided on the base 7. A detection mechanism 8 is provided on the frame 1, a guide frame 9 is provided between the two sets of drive shafts 3, and the end of the guide frame 9 is rotatably connected to the drive shafts 3. The detection mechanism 8 includes two sets of guide posts 801, the guide posts 801 are fixedly installed on the frame 1, one end of a movable plate 802 is slidably connected to the two sets of guide posts 801, a probe 804 is fixedly installed on the other end of the movable plate 802, a first cylinder 803 is fixedly installed on one side of the frame 1 for driving the movable plate 802, a connector 805 is located below the probe 804, and a second cylinder 806 is fixedly installed on the guide frame 9 for driving the connector 805.

[0026] Specifically, attached Figure 1 The middle arrow indicates the loading point. Initially, a set of feeding racks 6 are located at the loading point. When the NB module 10 needs to be tested, the NB module 10 to be tested is placed on the feeding rack 6 at the loading point. Then, a set of drive shafts 3 are driven by a motor to rotate. The drive shafts 3 drive two sets of sprockets 4 to rotate. The two sets of sprockets 4 drive two sets of chains 5, along with several sets of bases 7 and several sets of feeding racks 6, to perform circular motion. Figure 2The middle arrow indicates the direction of circular motion, moving the feeding rack 6 containing the NB module 10 below the probe 804, and the next feeding rack 6 moves to the loading point, achieving automatic feeding of the NB module 10. Simultaneously, the first cylinder 803 and the second cylinder 806 are activated. The first cylinder 803 moves the movable plate 802 downwards along with the probe 804, causing the probe 804 to engage with the pinhole on the NB module 10. Simultaneously, the second cylinder 806 pushes the socket 805 upwards, causing the socket 805 to engage with the pins on the NB module 10. Then, the socket 805 is energized to test the NB module 10. During the testing process, the NB module 10 to be tested is placed on the next feeding rack 6. After the test is completed, the feeder 805 and probe 804 are retracted, and several sets of feed racks 6 continue to be driven to perform circular motion. After the test is completed, the NB module 10 moves in a circular motion with the feed racks 6. Under the action of gravity, the NB module 10 will automatically detach from the corresponding feed rack 6 and fall onto the conveyor belt mechanism 2 below. The NB module 10 is then transported to the next process by the conveyor belt mechanism 2, realizing the automatic unloading of the NB module 10. The above operation is then repeated. Compared with the existing technology, by driving the feed racks 6 to perform circular motion, the automatic loading and unloading of the NB module 10 is realized, which not only improves the automation rate of the device, but also saves the time wasted in picking up and placing the NB module 10, thus improving the testing efficiency of the NB module 10.

[0027] like Figures 4 to 7 As shown, the feeding rack 6 includes a feeding seat 601, which is mounted on the base 7. A feeding slot 602 for placing the NB module 10 is formed on the feeding seat 601. A movable block 603 is movably mounted on the feeding seat 601. A rubber block 604 is fixedly mounted on the end of the movable block 603. A receiving block 607 is movably mounted inside the movable block 603. A movable rod 606 is fixedly connected to the lower end of the receiving block 607. A third spring 605 is sleeved on the movable rod 606. A roller 608 is rotatably mounted at the lower end. The roller 608 is rotatably connected to the outer ring of the guide frame 9. The outer ring of the guide frame 9 is composed of a first annular surface 901, a first inclined surface 902, and a second annular surface 903. A movable groove 6011 is provided on the feeding seat 601. A movable block 603 is slidably connected to the movable groove 6011. Inclined grooves 6031 are provided on both sides of the movable block 603. A pin 6071 is fixedly installed on the receiving block 607. The two ends of the pin 6071 are respectively located in the two sets of inclined grooves 6031.

[0028] Specifically, when the NB module 10 is placed on the conveyor belt mechanism 2, it is thrown onto the conveyor belt mechanism 2, and the position of the NB module 10 at the time of throwing is relatively high, causing the NB module 10 to be distributed very randomly on the conveyor belt mechanism 2, affecting the efficiency of further processing of the NB module 10. After the NB module 10 has been tested, it continues to move in a circular motion with the unloading rack 6. At the same time, the roller 608 on the unloading rack 6 will roll along the first annular surface 901, and the roller 608 will be pushed by the first inclined surface 902, causing the roller 608 to drive the movable rod 606 to move upward. The movable rod 606 compresses the third spring 605, and the movable rod 606 drives the pin 6071, causing the end of the pin 6071 to slide along the inclined groove 6031. Under the guidance of the inclined groove 6031, the movable block 603 and the rubber block 604 move along the inclined groove 6031. The moving groove 6011 moves towards the NB module 10 until the rubber block 604 presses against the NB module 10, and the roller 608 rolls onto the second annular surface 903, fixing the NB module 10 in the discharge groove 602. As the NB module 10 makes a circular motion, it moves to the lower end of the entire device along with the corresponding discharge rack 6. At this time, the NB module 10 is close to the conveyor belt on the conveyor belt mechanism 2, and the roller 608 will roll from the second annular surface 903 to the first annular surface 901. Under the rebound force of the third spring 605, the pressure of the rubber block 604 on the NB module 10 is released. Under the action of gravity, the NB module 10 will automatically fall onto the conveyor belt mechanism 2. Since the NB module 10 is relatively close to the conveyor belt mechanism 2, it falls onto the conveyor belt mechanism 2 in a straight line and neatly, avoiding any impact on the further processing efficiency of the NB module 10.

[0029] Example 2: Figures 8 to 10As shown in the comparative embodiment one, another embodiment of the present invention is as follows: The base 7 includes a seat body 701, with two sets of chains 5 connected to both ends of the seat body 701, two sets of slide rods 702 symmetrically installed inside the seat body 701, two sets of limiting mechanisms 703 symmetrically distributed on both sides of the seat body 701, and a first spring 704 sleeved on the end of the slide rod 702. One end of the first spring 704 is fixedly connected to the inner wall of the seat body 701, and the other end of the first spring 704 is fixedly connected to the feeding seat 601. Two sets of through holes 6012 are symmetrically opened on the feeding seat 601, and the two sets of through holes 6012 are slidably connected to the two sets of slide rods 702 respectively. The limiting mechanism 703 includes two sets of limiting blocks 7031, which are fixedly installed inside the seat body 701, and a guide rail 703 is provided between the two sets of limiting blocks 7031. 3. The guide rail 7033 is fixedly installed inside the base 701. The unlocking block 7032 is slidably connected to the guide rail 7033. The feeding base 601 is provided with a locking mechanism 609 on both sides. The locking mechanism 609 includes a fixed arm 6091. One end of the fixed arm 6091 is fixedly connected to the feeding base 601. The locking block 6092 is movably inserted into the other end of the fixed arm 6091. The locking block 6092 is used to lock the limiting block 7031. A second spring 6093 is provided in the other end of the fixed arm 6091. A pressure rod 610 is provided on the feeding base 601. A third cylinder 101 for pushing the pressure rod 610 is fixedly installed on one side of the upper end of the frame 1. An unlocking plate 102 is fixedly installed on one side of the upper end of the frame 1. A second inclined surface 103 for pushing the pressure rod 610 a second time is provided on the unlocking plate 102.

[0030] Specifically, during the testing of NB modules 10, there will be good and defective NB modules 10. Since the tested NB modules 10 will be distributed in a line on the conveyor belt mechanism 2, it is not convenient for the staff to distinguish between good and defective products. The height of the inclined surface of the limit block 7031 is lower than the height of the inclined surface of the unlocking block 7032. In the initial state, the end of the unlocking block 7032 is located between the two sets of limit blocks 7031. When the tested NB module 10 is defective, the nut 805 and probe 804 are first withdrawn. Then, the pressure rod 610 is pushed by the third cylinder 101. The pressure rod 610 drives the discharge seat 601 to move together with the NB module 10. The through hole 6012 on the discharge seat 601 moves along the corresponding slide bar. 702 slides, and the feeding seat 601 stretches the two sets of first springs 704. At the same time, the two sets of locking mechanisms 609 move together with the feeding seat 601. During the movement, the end of the locking block 6092 on the locking mechanism 609 is squeezed by the inclined surface on the limiting block 7031, causing the locking block 6092 to move towards the other end of the fixed arm 6091. The locking block 6092 compresses the second spring 6093 until the end of the locking block 6092 is misaligned with the inclined surface on the limiting block 7031. At the same time, the end of the locking block 6092 pushes the unlocking block 7032, causing the end of the unlocking block 7032 to disengage from the limiting blocks 7031. The unlocking block 7032 slides along the guide rail 7033 until the locking block 6092 is misaligned with the two sets of limiting blocks 7031. Under the action of rebound force, the end of the locking block 6092 is locked between the unlocking block 7032 and the limiting block 7031, thereby limiting the feeding seat 601. At this time, the feeding seat 601 corresponding to the defective product is not on the same circumferential line as other feeding seats 601. When the feeding seat 601 corresponding to the defective product moves to the lower end of the entire device, the roller 608 on the feeding seat 601 rolls from the second annular surface 903 to the first annular surface 901, and the defective NB module 10 will fall onto the conveyor belt mechanism 2. At this time, the defective NB module 10 is not on the same line as other good NB modules 10 and is distributed on the conveyor belt mechanism 2. After the defective NB module 10 falls onto the conveyor belt mechanism 2, as the feeding seat 601 continues to perform circular motion... The end of the pressure rod 610 on the feeding seat 601 will be squeezed by the second inclined surface 103 on the unlocking plate 102, causing the pressure rod 610 to drive the feeding seat 601 to continue moving. The first spring 704 is stretched again, and at the same time, the end of the locking block 6092 is squeezed by the inclined surface of the unlocking block 7032 until the end of the locking block 6092 is misaligned with the inclined surface of the unlocking block 7032. Under the rebound force of the second spring 6093, the end of the locking block 6092 is pressed tightly against the unlocking block 7032. When the pressure rod 610 is misaligned with the unlocking plate 102, under the rebound force of the first spring 704, the locking block 6092 drives the unlocking block 7032 to slide along the guide rail 7033 until the end of the unlocking block 7032 returns between the two sets of limit blocks 7031 and can no longer move.Card block 6092 will offset unlocking block 7032 and two sets of limit blocks 7031, causing the feeding seat 601 to return to its original position. Since the defective NB module 10 and other good NB modules 10 are not on the same line distributed on the conveyor belt mechanism 2, it facilitates the sorting of defective and good products by the staff.

[0031] Working principle: The NB module 10 to be tested is placed on the feeding rack 6 located at the feeding point. Then, a set of transmission shafts 3 is driven by a motor to rotate. The transmission shafts 3 drive two sets of sprockets 4 to rotate. The two sets of sprockets 4 drive two sets of chains 5, along with several sets of bases 7 and several sets of feeding racks 6, to perform circular motion. Figure 2 The middle arrow indicates the direction of circular motion, moving the feeding rack 6 containing the NB module 10 below the probe 804, and the next feeding rack 6 moves to the loading point, achieving automatic feeding of the NB module 10. Simultaneously, the first cylinder 803 and the second cylinder 806 are activated. The first cylinder 803 moves the movable plate 802 downwards along with the probe 804, causing the probe 804 to engage with the pinhole on the NB module 10. At the same time, the second cylinder 806 pushes the socket 805 upwards, causing the socket 805 to engage with the pins on the NB module 10. Then, the socket 805 is energized to achieve automatic feeding. During the testing of NB module 10, the NB module 10 to be tested is placed on the next set of feeding racks 6. After the NB module 10 is tested, the feeder 805 and probe 804 are withdrawn, and several sets of feeding racks 6 continue to be driven to make circular motion. After the test is completed, the NB module 10 moves in a circular motion with the feeding racks 6. As the NB module 10 moves in a circular motion, under the action of gravity, the NB module 10 will automatically detach from the corresponding feeding rack 6 and fall onto the conveyor belt mechanism 2 below. The NB module 10 is then transported to the next process by the conveyor belt mechanism 2. After the NB module 10 passes the test, it continues to rotate with the feeding rack 6. Simultaneously, the roller 608 on the feeding rack 6 rolls along the first annular surface 901 and is pushed by the first inclined surface 902, causing the roller 608 to drive the movable rod 606 upwards. The movable rod 606 compresses the third spring 605, and drives the pin 6071, causing its end to slide along the inclined groove 6031. Guided by the inclined groove 6031, the movable block 603, along with the rubber block 604, moves along the movable groove 6011 towards the NB module 10 until the rubber block 604 presses against the NB module 10, and the roller 608 rolls precisely. The NB module 10 moves to the second annular surface 903, fixing it in the feeding trough 602. As the NB module 10 makes a circular motion, it moves to the lower end of the entire device along with the corresponding feeding rack 6. At this time, the NB module 10 is close to the conveyor belt on the conveyor belt mechanism 2, and the roller 608 will roll from the second annular surface 903 to the first annular surface 901. Under the rebound force of the third spring 605, the rubber block 604 is released from squeezing the NB module 10. Under the action of gravity, the NB module 10 will automatically fall onto the conveyor belt mechanism 2. Since the NB module 10 is relatively close to the conveyor belt mechanism 2, it falls onto the conveyor belt mechanism 2 in a straight line and neatly. When the tested NB module 10 is defective, firstly, the nut 805 and probe 804 are retracted. Then, the pressure rod 610 is pushed by the third cylinder 101. The pressure rod 610 drives the feeding seat 601 to move along with the NB module 10. The through hole 6012 on the feeding seat 601 slides along the corresponding slide rod 702, and the feeding seat 601 stretches the two sets of first springs 704. At the same time, the two sets of locking mechanisms 609 move together with the feeding seat 601. During the movement, the end of the locking block 6092 on the locking mechanism 609 will be squeezed by the inclined surface of the limiting block 7031, causing the locking block 6092 to move inward toward the other end of the fixed arm 6091. 2. Compress the second spring 6093 until the end of the locking block 6092 is offset from the inclined surface on the limiting block 7031. At the same time, the end of the locking block 6092 pushes the unlocking block 7032, causing the end of the unlocking block 7032 to disengage from the limiting blocks 7031. The unlocking block 7032 slides along the guide rail 7033 until the locking block 6092 is offset from the two sets of limiting blocks 7031. Under the rebound force of the first spring 704, the end of the locking block 6092 is locked between the unlocking block 7032 and the limiting blocks 7031, thus limiting the feeding seat 601. At this time, the feeding seat 601 corresponding to the defective product is not on the same circumference as other feeding seats 601. When the feeding seat 6092 corresponding to the defective product... When the device moves to the lower end, the roller 608 on the feeding seat 601 rolls from the second annular surface 903 to the first annular surface 901, and the defective NB module 10 will fall onto the conveyor belt mechanism 2. At this time, the defective NB module 10 is not on the same line as the other good NB modules 10 and is distributed on the conveyor belt mechanism 2. After the defective NB module 10 falls onto the conveyor belt mechanism 2, as the feeding seat 601 continues to perform circular motion, the end of the pressure rod 610 on the feeding seat 601 will be squeezed by the second inclined surface 103 on the unlocking plate 102, causing the pressure rod 610 to drive the feeding seat 601 to continue moving, and the first spring 704 is stretched again. At the same time, the end of the locking block 6092 is pressed by the inclined surface of the unlocking block 7032 until the end of the locking block 6092 is offset from the inclined surface of the unlocking block 7032. Under the rebound force of the second spring 6093, the end of the locking block 6092 is pressed tightly against the unlocking block 7032. When the pressure rod 610 is offset from the unlocking plate 102, under the rebound force of the first spring 704, the locking block 6092 drives the unlocking block 7032 to slide along the guide rail 7033 until the end of the unlocking block 7032 returns to the two sets of limit blocks 7031 and cannot move further. The locking block 6092 will offset the unlocking block 7032 and the two sets of limit blocks 7031, so that the material feeding seat 601 returns to its original position.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A testing device for a smart meter NB module, comprising a frame (1), characterized in that: Two sets of drive shafts (3) are rotatably installed inside the frame (1). A conveyor belt mechanism (2) is provided at the bottom of the frame (1). Both ends of the drive shaft (3) are provided with sprockets (4). The two sets of sprockets (4) respectively mesh with two sets of chains (5). Several sets of bases (7) are distributed between the two sets of chains (5). A feeding rack (6) for placing NB modules (10) is provided on the base (7). A detection mechanism (8) is provided on the frame (1). A guide frame (9) is provided between the two sets of drive shafts (3). The end of the guide frame (9) is rotatably connected to the drive shaft (3). The testing mechanism (8) includes two sets of guide posts (801), which are fixedly installed on the frame (1); Movable plate (802), one end of which is slidably connected to two sets of guide posts (801); A probe (804) is fixedly installed on the other end of the movable plate (802); A first cylinder (803) is fixedly installed on one side of the frame (1) for driving the movable plate (802); A connector (805) is located below the probe (804); A second cylinder (806) is fixedly mounted on the guide frame (9) for driving the nut (805); The base (7) includes a seat (701), and two sets of chains (5) are respectively connected to both ends of the seat (701); Two sets of slide rods (702) are symmetrically installed in the seat (701); Two sets of limiting mechanisms (703) are symmetrically distributed on both sides of the seat (701); A first spring (704) is sleeved on the end of the slide rod (702). One end of the first spring (704) is fixedly connected to the inner wall of the seat (701), and the other end of the first spring (704) is fixedly connected to the feeding seat (601). Two sets of through holes (6012) are symmetrically opened on the feeding seat (601), and the two sets of through holes (6012) are slidably connected to the two sets of slide rods (702) respectively. The limiting mechanism (703) includes two sets of limiting blocks (7031), which are fixedly installed inside the base (701); A guide rail (7033) is disposed between the two sets of limiting blocks (7031), and the guide rail (7033) is fixedly installed inside the base (701); The unlocking block (7032) is slidably connected to the guide rail (7033); Both sides of the feeding seat (601) are provided with a locking mechanism (609). The locking mechanism (609) includes a fixed arm (6091), one end of which is fixedly connected to the feeding seat (601). A locking block (6092) is movably inserted into the other end of the fixed arm (6091), the locking block (6092) being used to engage the limiting block (7031); A second spring (6093) is provided in the other end of the fixed arm (6091). A pressure rod (610) is provided on the feeding seat (601). A third cylinder (101) for pushing the pressure rod (610) is fixedly installed on one side of the upper end of the frame (1). An unlocking plate (102) is fixedly installed on one side of the upper end of the frame (1). A second inclined surface (103) for pushing the pressure rod (610) a second time is provided on the unlocking plate (102).

2. The smart meter NB module testing device according to claim 1, characterized in that: The feeding rack (6) includes a feeding seat (601), which is mounted on the base (7); A feeding slot (602) for placing the NB module (10) is provided on the feeding seat (601). Movable block (603) is mounted on the feeding seat (601); A rubber block (604) is fixedly installed on the end of the movable block (603); The receiving block (607) is installed within the active block (603). The movable rod (606) is fixedly connected to the lower end of the receiving block (607). A third spring (605) is sleeved on the movable rod (606).

3. The smart meter NB module testing device according to claim 2, characterized in that: The lower end of the movable rod (606) is rotatably mounted with a roller (608), which is rotatably connected to the outer ring of the guide frame (9). The outer ring of the guide frame (9) is composed of a first annular surface (901), a first inclined surface (902), and a second annular surface (903).

4. The smart meter NB module testing device according to claim 3, characterized in that: The feeding seat (601) is provided with a movable groove (6011), and the movable block (603) is slidably connected to the movable groove (6011).

5. The smart meter NB module testing device according to claim 4, characterized in that: The movable block (603) has inclined grooves (6031) on both sides, and a pin (6071) is fixedly installed on the receiving block (607). The two ends of the pin (6071) are respectively located in the two sets of inclined grooves (6031).

Images