Return spring verticality detection device

Abstract

The utility model relates to a return spring verticality detection device, and belongs to the field of vacuum booster detection devices. The stand column is assembled on the bottom plate through screws, the air cylinder fixing plate is assembled on the top of the stand column through screws, the stroke-adjustable air cylinder is assembled above the air cylinder fixing plate through screws, the upper pressing plate is fixedly connected with a piston rod of the stroke-adjustable air cylinder, the upper conducting ring is pressed in an annular groove of the upper pressing plate, and the lower conducting ring is pressed in an annular groove of the positioning seat. And the positioning seat is mounted on the bottom plate by using screws. The device has the advantages that the structure is novel, the stroke-adjustable air cylinder is used for compressing the return spring of a product, the compression height can be adjusted to meet the drawing requirements of the product through the stroke adjusting nut of the air cylinder, and the perpendicularity detection requirements of the return springs with different diameters, different resistances and different compression heights are met; product quality and consistency are effectively guaranteed, unqualified products are effectively prevented from flowing out, and abnormal sound caused by friction is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum booster testing devices and is applied to the detection of the verticality of the return spring in the production process of vacuum boosters for high-end cars and microcars. Background Technology

[0002] A power booster is a component that uses hydraulic, pneumatic, vacuum (negative pressure), or electrical energy to increase the force applied to the pedal by the driver. Currently, power boosters include pneumatic boosters, vacuum boosters, electric boosters, and hydraulic boosters.

[0003] The vacuum booster assembly is a key component of the automotive braking system. Its main function is to amplify the servo force through the vacuum booster by applying the pedal force, which is then applied to the master cylinder, causing it to move forward and compress the brake fluid in the master cylinder. The hydraulic fluid is then delivered to the vehicle's braking system through the master cylinder outlet, thereby achieving the vehicle's braking function.

[0004] Vacuum boosters can be broadly classified into two structures: double-diaphragm and single-diaphragm. They generate pressure through the vacuum pressure difference between the front and rear chambers, thereby increasing the output force and achieving the assist function. The vacuum booster is divided into front and rear chambers by a diaphragm. In the non-braking state, the vacuum generated by the engine evacuates both chambers, creating a vacuum environment with equal pressure in both chambers. When the brake pedal is applied, the rear chamber begins to release atmospheric pressure through a valve switching mechanism, while the front chamber remains a vacuum. The pressure difference between the two chambers generates vacuum assistance. When the brake is released, the vacuum booster is reset by an internal return spring, ensuring that both chambers maintain the same vacuum level, preparing for the next braking action.

[0005] When braking, the return spring of a vacuum booster is compressed. During compression, if the spring's perpendicularity is not up to standard, the spring will be misaligned and interfere with the spring seat, causing abnormal noise. As users' requirements for automotive comfort continue to increase, this abnormal noise will be classified as a quality issue. To ensure product quality, the spring's perpendicularity needs to be self-checked before product assembly. Therefore, it is necessary to develop a device for online perpendicularity detection of the return spring. Summary of the Invention

[0006] This utility model provides a return spring perpendicularity detection device, which is used to detect the perpendicularity of the return spring before assembling the product, so as to ensure that the perpendicularity of the spring after compression meets the requirements of the drawing.

[0007] The technical solution adopted by this utility model includes a base plate, a column, a cylinder fixing plate, a stroke adjustable cylinder, an upper pressure plate, an upper conductive ring, a positioning seat, and a lower conductive ring. The column is assembled to the base plate with screws, the cylinder fixing plate is assembled to the top of the column with screws, the stroke adjustable cylinder is assembled to the top of the cylinder fixing plate with screws, the upper pressure plate is fixedly connected to the piston rod of the stroke adjustable cylinder, the upper conductive ring is press-fitted into the annular groove of the upper pressure plate, the lower conductive ring is press-fitted into the annular groove of the positioning seat, and the positioning seat is mounted on the base plate with screws.

[0008] Press the upper terminal onto the upper conductive ring, and connect the wire to the upper terminal.

[0009] Press the lower terminal onto the lower conductive ring, and connect the wire to the lower terminal.

[0010] The screws used are all internal hexagonal head screws.

[0011] The advantages of this utility model are its novel structure, which uses an adjustable-stroke cylinder to compress the product's return spring. The compression height can be adjusted by the cylinder's stroke adjusting nut to meet the compression height required by the product drawings. This satisfies the perpendicularity detection requirements of return springs with different diameters, resistances, and compression heights. By conducting current, it effectively identifies problems with non-perpendicularity after spring compression. The device is easy and quick to adjust, operates stably, and can guarantee product quality. The device has low manufacturing cost, good stability, and small space requirements. It can be used in conjunction with assembly equipment to effectively ensure product quality and consistency, effectively prevent the outflow of defective products, and ensure that there is no interference with the product's spring seat, avoiding abnormal noise caused by friction. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional view of the present invention;

[0014] Figure 3 This is a schematic diagram of the detection status of this utility model;

[0015] Figure 4 This is a partial schematic diagram of the spring detection process of this utility model at the upper conductive ring.

[0016] Figure 5 This is a partial schematic diagram of the spring detection process of this utility model and the lower conductive ring. Detailed Implementation

[0017] like Figure 1 , 2As shown, the system includes a base plate 1, a column 2, a cylinder fixing plate 3, a stroke adjustable cylinder 4, an upper pressure plate 5, an upper conductive ring 6, a positioning seat 7, and a lower conductive ring 9. The column 2 is assembled onto the base plate 1 using hexagon socket head cap screws. The cylinder fixing plate 3 is assembled onto the top of the column 2 using hexagon socket head cap screws. The stroke adjustable cylinder 4 is assembled onto the cylinder fixing plate 3 using hexagon socket head cap screws. The upper pressure plate 5 is fixedly connected to the piston rod of the stroke adjustable cylinder 4. The upper conductive ring 6 is pressed into the annular groove of the upper pressure plate 5. The lower conductive ring 9 is pressed into the annular groove of the positioning seat 7. The positioning seat 7 is mounted onto the base plate 1 using hexagon socket head cap screws.

[0018] like Figure 4 As shown, the upper terminal 8 is press-fitted onto the upper conductive ring 6, and the wire is connected to the upper terminal;

[0019] like Figure 5 As shown, the lower terminal 10 is press-fitted onto the lower conductive ring 9, and the wire is connected to the lower terminal.

[0020] Working principle

[0021] like Figure 3 , 4 As shown in Figure 5, the return spring 11 under test is placed on the positioning seat 7. The positioning seat 7 is made of insulating material and contains a lower conductive ring 9. The inner diameter of the lower conductive ring 9 is designed according to the maximum vertical deviation limit of the return spring after compression. The upper pressure plate 5 is also made of insulating material and is also equipped with an upper conductive ring 6. At the start of the test, the limit of the stroke adjustable cylinder 4 is adjusted according to the required compression stroke of the return spring to ensure that the compression stroke is met. After the stroke adjustable cylinder 4 of the starting device is pressed down to the set stroke, the return spring is compressed. After the return spring is compressed, the spring pitch becomes smaller. If the spring stability is poor, it will deflect. If the two ends of the spring are deflected, the verticality will not be up to standard after compression. It will contact the upper and lower conductive rings, causing current to flow and triggering an alarm indicating failure. By conducting current, the problem of unqualified verticality after spring compression is effectively identified, and return springs with unqualified verticality are effectively isolated. The verticality of the spring can be tested independently or in conjunction with the assembly equipment.

Claims

1. A device for detecting the perpendicularity of a return spring, characterized in that: It includes a base plate, a column, a cylinder mounting plate, a stroke adjustable cylinder, an upper pressure plate, an upper conductive ring, a positioning seat, and a lower conductive ring. The column is assembled to the base plate with screws, the cylinder mounting plate is assembled to the top of the column with screws, the stroke adjustable cylinder is assembled to the top of the cylinder mounting plate with screws, the upper pressure plate is fixedly connected to the piston rod of the stroke adjustable cylinder, the upper conductive ring is press-fitted into the annular groove of the upper pressure plate, the lower conductive ring is press-fitted into the annular groove of the positioning seat, and the positioning seat is mounted on the base plate with screws.

2. The return spring perpendicularity detection device according to claim 1, characterized in that: Press the upper terminal onto the upper conductive ring, and connect the wire to the upper terminal.

3. The return spring perpendicularity detection device according to claim 1, characterized in that: Press the lower terminal onto the lower conductive ring, and connect the wire to the lower terminal.

4. The return spring perpendicularity detection device according to claim 1, characterized in that: The screws used are all internal hexagonal head screws.

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