Automobile PM2.5 sensor assembly tool

Abstract

The utility model discloses an automobile PM2.5 sensor assembly tool, which relates to the technical field of sensor assembly and comprises a bottom plate, a PCB (printed circuit board) conveying line, a lower shell conveying line and an upper shell conveying line are sequentially and fixedly mounted on the upper surface of the bottom plate from left to right, and the upper surface of the bottom plate is fixedly connected with vertical columns on the left side and the right side of the lower shell conveying line. A fixing plate is fixedly connected to the upper portion between the two stand columns, a pushing air cylinder is fixedly connected to the middle of the upper surface of the fixing plate, the output end of the pushing air cylinder penetrates through the fixing plate and is fixedly connected with a connecting plate, moving sliding rails are fixedly connected to the front sides of the two stand columns, and clamping assemblies are slidably connected to the front sides of the two moving sliding rails through sliding blocks. The automatic assembly line has the advantages that by arranging the PCB conveying line, the lower shell conveying line and the upper shell conveying line, automatic conveying of parts is achieved, the clamping assembly, the pushing air cylinder and the like are matched, the last part can be assembled while the next part is clamped, and the production efficiency is remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of sensor assembly technology, specifically to an assembly fixture for an automotive PM2.5 sensor. Background Technology

[0002] An automotive PM2.5 sensor is a device used to detect the concentration of PM2.5 in the air inside a car. It plays an important role in monitoring in-vehicle air quality and protecting the health of drivers and passengers. The main principles are laser scattering and electrostatic adsorption. Laser scattering sensors use laser light to illuminate airborne particles, causing them to scatter the light. The PM2.5 concentration is calculated by detecting the intensity of the scattered light. Electrostatic adsorption sensors charge the particles, causing them to adhere to a collecting electrode. The concentration is determined based on the amount of charge collected. The structure of a PM2.5 sensor includes a lower housing, an upper housing that snaps into the lower housing, and a PCB board located between the lower and upper housings. In the production of PM2.5 sensors, the lower housing, upper housing, and PCB board are manufactured separately and then assembled.

[0003] When assembling automotive PM2.5 sensors, the PCB board is usually placed inside the lower housing manually, and then the upper housing is snapped on for assembly. Since manual assembly is required, the speed is relatively slow, especially under high-volume production demands. Manual operation is difficult to meet the needs of efficient and rapid production, which may affect the production cycle and increase production costs. To address the above problems, an automotive PM2.5 sensor assembly fixture is proposed to solve the problem. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides an assembly fixture for an automotive PM2.5 sensor. This fixture solves the problem that currently, when assembling automotive PM2.5 sensors, the PCB board is typically placed manually inside the lower housing before the upper housing is attached. Because this requires manual assembly, the process is relatively slow, especially under high-volume production demands. Manual operation cannot meet the requirements of efficient and rapid production, which may affect the production cycle and increase production costs.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an assembly fixture for an automotive PM2.5 sensor, including a base plate. From left to right, a PCB board transport line, a lower housing transport line, and an upper housing transport line are fixedly installed on the upper surface of the base plate. Columns are fixedly connected to both sides of the lower housing transport line on the upper surface of the base plate. A fixing plate is fixedly connected above the two columns. A push cylinder is fixedly connected to the middle of the upper surface of the fixing plate. The output end of the push cylinder passes through the fixing plate and is fixedly connected to a connecting plate. Movable slide rails are fixedly connected to the front sides of both columns. Clamping components are slidably connected to the front sides of the two movable slide rails via sliding blocks.

[0006] Preferably, side plates are fixedly connected to both the left and right sides above the lower housing transport line, and two positioning wedges are fixedly connected to the inner sides of the two side plates below the clamping assembly.

[0007] Preferably, a limiting cylinder is fixedly connected to the outer side of both side plates, and a limiting plate is fixedly connected between the output ends of the two limiting cylinders. The limiting plate is T-shaped and its bottom center is located between two positioning inclined blocks.

[0008] Preferably, the clamping assembly includes a movable plate, the left and right ends of the rear side of the movable plate are slidably connected to two movable slide rails via sliding blocks, the middle of the rear side of the movable plate is fixedly connected to the front side of the connecting plate, and fixed supports are fixedly connected to the left and right ends of the front side of the movable plate.

[0009] Preferably, a movable lead screw is rotatably connected above the two fixed supports, a limit rod is fixedly connected below the two fixed supports, and a movable motor for driving the movable lead screw to rotate is fixedly installed on the side of the right fixed support.

[0010] Preferably, a movable block is threadedly connected to the outer surface of the movable lead screw, the movable block is slidably connected to the limiting rod, and a mounting plate is fixedly connected to the front side of the movable block by bolts.

[0011] Preferably, L-shaped plates are fixedly connected to both the left and right ends of the front side of the mounting plate, two sets of clamping cylinders are fixedly connected above the two L-shaped plates, and clamping plates are fixedly connected to the output ends of the four clamping cylinders.

[0012] Compared with existing technologies, the advantages of this utility model are as follows: By setting up PCB board transport lines, lower housing transport lines, and upper housing transport lines, this utility model achieves automated transportation of parts. Combined with clamping components and push cylinders, it can assemble the previous component while clamping the next, avoiding downtime during manual operation, significantly improving production efficiency, meeting high-volume demands, and shortening the production cycle. The positioning wedges and limiting plates on the lower housing transport line work together to accurately position the lower housing, ensuring that the clamping components accurately clamp the PCB board and place it into the lower housing, as well as the subsequent accurate assembly of the upper housing, improving assembly accuracy and product quality. The setting of push cylinders, limiting cylinders, clamping cylinders, and moving motors automates the clamping, moving, and positioning assembly processes, reducing manual intervention, lowering labor costs, and also reducing product quality problems caused by human error. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is the clamping component in this utility model;

[0015] Figure 3 for Figure 1 A magnified view of a section at point A in the middle;

[0016] Figure 4 for Figure 2 A magnified view of a section at point B.

[0017] The numbers on the map are:

[0018] 1. Base plate; 2. PCB board transport line; 3. Lower shell transport line; 4. Upper shell transport line; 5. Column; 6. Moving slide rail; 7. Push cylinder; 8. Clamping assembly; 801. Moving plate; 802. Connecting plate; 803. Fixed support; 804. Moving screw; 805. Limiting rod; 806. Moving block; 807. Mounting plate; 808. Moving motor; 809. L-shaped plate; 810. Clamping cylinder; 811. Clamping plate; 9. Side plate; 10. Positioning wedge; 11. Limiting cylinder; 12. Limiting plate; 13. Fixed plate. Detailed Implementation

[0019] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0020] Reference Figure 1-4 As shown, an assembly fixture for an automotive PM2.5 sensor includes a base plate 1. From left to right, a PCB board transport line 2, a lower housing transport line 3, and an upper housing transport line 4 are sequentially fixedly mounted on the upper surface of the base plate 1. Columns 5 are fixedly connected to both sides of the lower housing transport line 3 on the upper surface of the base plate 1. A fixing plate 13 is fixedly connected above and between the two columns 5. A push cylinder 7 is fixedly connected to the center of the upper surface of the fixing plate 13. The output end of the push cylinder 7 passes through the fixing plate 13 and is fixedly connected to a connecting plate 802. The front sides of both columns 5 are... The PCB board transport line 2, the lower housing transport line 3, and the upper housing transport line 4 are all driven by stepper motors to ensure that the transport lines can accurately transport the parts to the position that the clamping components 8 can clamp when they move. This is the prior art and will not be described here. If it is necessary to add a limiting function to the PCB board transport line 2 and the upper housing transport line 4, the same setting as above the lower housing transport line 3 can be selected.

[0021] Specifically, side plates 9 are fixedly connected to the left and right sides above the lower housing transport line 3. Two positioning inclined blocks 10 are fixedly connected to the inner side of the two side plates 9 below the clamping assembly 8. The positioning inclined blocks 10 are used to guide the lower housing to the central position to ensure the accuracy during assembly.

[0022] Furthermore, limit cylinders 11 are fixedly connected to the outer sides of both side plates 9, and a limit plate 12 is fixedly connected between the output ends of the two limit cylinders 11. The limit plate 12 is T-shaped and its bottom center is located between the two positioning inclined blocks 10.

[0023] Specifically, the clamping assembly 8 includes a movable plate 801. The left and right ends of the rear side of the movable plate 801 are slidably connected to two movable slide rails 6 via sliding blocks. The middle of the rear side of the movable plate 801 is fixedly connected to the front side of the connecting plate 802. Fixed supports 803 are fixedly connected to the left and right ends of the front side of the movable plate 801. The push cylinder 7 drives the clamping assembly 8 to move up and down along the movable slide rails 6 through the connecting plate 802. The guide design of the slide rails eliminates the radial wobble of the cylinder piston rod, ensuring the repeatability of the clamping position and improving the positioning accuracy.

[0024] Furthermore, a movable lead screw 804 is rotatably connected above the two fixed supports 803, and a limit rod 805 is fixedly connected below the two fixed supports 803. A movable motor 808 for driving the movable lead screw 804 to rotate is fixedly installed on the side of the right fixed support 803. By driving the movable lead screw 804 to rotate through the movable motor 808, the dual-station switching of clamping the PCB board on the left and clamping the upper shell on the right can be realized. Two assembly actions are completed in a single movement, and the theoretical production efficiency is increased by two times.

[0025] Furthermore, a moving block 806 is threadedly connected to the outer surface of the moving lead screw 804. The moving block 806 is slidably connected to the limiting rod 805. A mounting plate 807 is fixedly connected to the front side of the moving block 806 by bolts. The stroke of the moving block 806 is adjustable, which is compatible with the assembly requirements of sensor housings of different specifications and reduces changeover time.

[0026] Furthermore, L-shaped plates 809 are fixedly connected to both the left and right ends of the front side of the mounting plate 807. Two sets of clamping cylinders 810 are fixedly connected above the two L-shaped plates 809. Clamping plates 811 are fixedly connected to the output ends of the four clamping cylinders 810. The clamping plates 811 are connected to the output ends of the cylinders by bolts, which can quickly change different shaped fixtures to adapt to the production of various types of sensors. The air supply triple unit for the pushing cylinder 7, the limiting cylinder 11 and the clamping cylinder 810 is common knowledge to those skilled in the art. At the same time, during the reset process of the pushing cylinder 7, the moving motor 808 has started the station switching, and the hidden action time further improves the assembly efficiency.

[0027] Working principle: The PCB board is placed on PCB board transport line 2, the lower housing is placed on lower housing transport line 3, and the upper housing is placed on upper housing transport line 4. Stepper motors drive each transport line to move the PCB board, lower housing, and upper housing to a position parallel to the clamping assembly 8. When the lower housing is transported below the clamping assembly 8, the limiting cylinder 11 is activated, and its output end pushes the limiting plate 12 downward. Since the limiting plate 12 is "T"-shaped and its bottom center is located between two positioning inclined blocks 10, the limiting plate 12 cooperates with the positioning inclined blocks 10 to accurately position the lower housing, ensuring the accurate position of the lower housing during assembly. The moving motor 808 is activated, driving the moving lead screw 804 to rotate. Guided by the limit rod 805, the moving block 806 on the outer surface of the moving screw 804 moves to the right as the moving screw 804 rotates, thereby adjusting the position of the mounting plate 807. This causes the clamping cylinder 810 on the left, which is holding the PCB board, to move directly above the lower housing. At this time, the clamping cylinder 810 on the right, which is not performing a clamping action, moves directly above the upper housing. Then, the cylinder 7 is activated, and its output end pushes the connecting plate 802. The connecting plate 802 drives the moving plate 801 to move downward along the moving slide rail 6, thereby fastening the PCB board inside the lower housing. At this time, the clamping cylinder 810 on the left releases its clamping action, while the clamping cylinder 810 on the right clamps the upper housing. After the PCB board is fastened, the cylinder 7 is pushed to pull the clamping assembly 8 upward, and the moving electric... Machine 808 drives moving block 806 to the far left. At this time, left clamping cylinder 810 moves to directly above PCB board transport line 2, while right clamping cylinder 810, which has clamped the upper housing, moves to directly above the lower housing that has been fastened to the PCB board. Then, cylinder 7 pushes clamping assembly 8 to descend, and the upper housing clamped on the right will fasten onto the lower housing, completing the assembly. Then, right clamping cylinder 810 releases the clamp, and left clamping cylinder 810 clamps the PCB board. Cylinder 7 pushes clamping assembly 8 to rise. At this time, limit cylinder 11 releases the limit, and lower housing transport line 3 transports the fastened sensor to the next process and transports another empty lower housing to below clamping assembly 8. This cycle continues until the sensor assembly is completed.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A tooling for assembling a PM2.5 sensor for automobiles, characterized in that: The base plate (1) is provided with a PCB board transport line (2), a lower housing transport line (3) and an upper housing transport line (4) fixedly installed on the upper surface of the base plate (1) from left to right. Columns (5) are fixedly connected to both sides of the lower housing transport line (3) on the upper surface of the base plate (1). A fixing plate (13) is fixedly connected above the two columns (5). A push cylinder (7) is fixedly connected to the middle of the upper surface of the fixing plate (13). The output end of the push cylinder (7) passes through the fixing plate (13) and is fixedly connected to a connecting plate (802). A sliding rail (6) is fixedly connected to the front side of the two columns (5). A clamping component (8) is slidably connected to the front side of the two sliding rails (6) through a sliding block.

2. The automotive PM2.5 sensor assembly fixture according to claim 1, characterized in that: The lower housing transport line (3) is fixedly connected to side plates (9) on both the left and right sides above it, and two positioning inclined blocks (10) are fixedly connected to the inner sides of the two side plates (9) below the clamping assembly (8).

3. The automotive PM2.5 sensor assembly fixture according to claim 2, characterized in that: Both side plates (9) are fixedly connected to limit cylinders (11) on their outer sides. A limit plate (12) is fixedly connected between the output ends of the two limit cylinders (11). The limit plate (12) is "T" shaped and its bottom center is located between two positioning inclined blocks (10).

4. A vehicle PM2.5 sensor assembly fixture according to any one of claims 1-3, characterized in that: The clamping assembly (8) includes a movable plate (801). The left and right ends of the rear side of the movable plate (801) are slidably connected to two movable slide rails (6) through sliding blocks. The middle rear side of the movable plate (801) is fixedly connected to the front side of the connecting plate (802). Fixed supports (803) are fixedly connected to the left and right ends of the front side of the movable plate (801).

5. The automotive PM2.5 sensor assembly fixture according to claim 4, characterized in that: A movable lead screw (804) is rotatably connected above the two fixed supports (803), and a limit rod (805) is fixedly connected below the two fixed supports (803). A movable motor (808) for driving the movable lead screw (804) to rotate is fixedly installed on the side of the right fixed support (803).

6. The automotive PM2.5 sensor assembly fixture according to claim 5, characterized in that: The outer surface of the movable lead screw (804) is threaded with a movable block (806), the movable block (806) is slidably connected to the limiting rod (805), and the front side of the movable block (806) is fixedly connected with an mounting plate (807) by bolts.

7. The automotive PM2.5 sensor assembly fixture according to claim 6, characterized in that: The mounting plate (807) has L-shaped plates (809) fixedly connected to both the left and right ends of the front side. Two sets of clamping cylinders (810) are fixedly connected above the two L-shaped plates (809). The output ends of the four clamping cylinders (810) are fixedly connected to clamping plates (811).

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