Mechanism for detecting air hole structure of automobile shock absorber piston

Abstract

A mechanism for detecting an air hole structure of a piston of an automobile shock absorber comprises an air cylinder, a pressing air inflation device and a piston, the air cylinder is provided with a movable push rod, the piston is provided with a cavity, the pressing air inflation device comprises an air inflation pipe, a pressing head and a pressure sensing assembly, an air inlet channel is formed in the pressing head, and an inlet of the air inlet channel is connected with the air inflation pipe; a pressure sensing assembly is arranged on the upper portion of the pressing head, the lower end of the pressure sensing assembly communicates with the air inlet channel, and the movable push rod pushes the pressing head to abut against the upper surface of the piston so that an outlet of the air inlet channel can communicate with the cavity. According to the utility model, whether the piston has a through hole or not is detected through the compression inflation device, so that the efficiency of screening out unqualified pistons is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing, in particular to a mechanism for detecting the air hole structure of a piston of an automobile shock absorber. Background Art

[0002] At present, there is a special shape of piston on the market. The piston shape is that the upper surface of the piston is a cone, a cavity is provided in the center of the piston, and a through hole is provided on one side of the cavity and penetrates the cavity. In the process of industrial manufacturing of this piston, casting is often used to make the blank, and then secondary processing is performed by machining to achieve high precision requirements. Although this saves a lot of costs, it often brings many technical difficulties. The most prominent one is that after machine cutting, some of the through holes of the piston are not made, which are unqualified pistons. Later manual inspection consumes a lot of time and manpower. Utility Model Content

[0003] The embodiment of the present application provides a mechanism for detecting the air hole structure of the automobile shock absorber piston, which can detect whether there is a through hole in the piston by compressing the inflation device, thereby improving the efficiency of screening out unqualified pistons.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a mechanism for detecting the air hole structure of a piston of an automobile shock absorber, comprising a cylinder, a compression and inflation device, and a piston, the cylinder being provided with a movable push rod, the piston being provided with a cavity, the compression and inflation device comprising an inflation tube, a pressure head, and a pressure sensing assembly, the interior of the pressure head being provided with an air intake passage, the inlet of the air intake passage being connected to the air intake pipe, the upper part of the pressure head being provided with a pressure sensing assembly, the lower end of the pressure sensing assembly being connected to the air intake passage, the movable push rod pushing the pressure head to press against the upper surface of the piston so that the outlet of the air intake passage is connected to the cavity.

[0005] Compared with the prior art, the advantages of the utility model are:

[0006] When in working state, the movable push rod pushes the pressure head to press against the upper surface of the piston to be tested, fixes the piston to be tested, and the inflation pipe inflates air into the cavity of the piston to be tested through the air inlet channel. The air inlet pipe of the pressure sensing assembly is connected to the air inlet channel. The pressure sensor is used to determine whether there is a through hole in the piston to be tested, thereby improving the efficiency of screening out unqualified pistons.

[0007] As an improvement of the present utility model, the shape of the lower surface of the pressure head is adapted to the shape of the upper surface of the piston, so that when the piston is inflated, the lower surface of the pressure head and the upper surface of the piston can form a sealed environment. Unqualified pistons can maintain pressure, and the pressure sensor has a higher value at this time. Qualified pistons do not maintain pressure, and the pressure sensor has a lower value at this time, thereby screening out unqualified pistons.

[0008] As an improvement of the present invention, the lower surface of the pressure head is a convex conical surface, and the upper surface of the piston is a concave conical surface. When the convex conical surface of the pressure head presses against the concave conical surface of the piston, the piston can be effectively fixed and positioned.

[0009] As an improvement of the utility model, the pressure sensing assembly includes a shell, an installation cavity is provided inside the shell, a pressure sensor and a circuit board are provided inside the installation cavity, the upper surface of the circuit board is abutted against the upper surface of the installation cavity, the lower surface of the circuit board is abutted against the upper surface of the pressure sensor, an air intake pipe is provided at the lower part of the shell, the pressure sensor is arranged opposite to the air intake pipe, the air intake pipe is connected to the installation cavity, the pressure sensor is connected to the circuit board together, it is not easy to be damaged during the production process, the pressure sensor is arranged opposite to the air intake pipe, so that the pressure sensor can respond to the incoming gas in time and output a signal.

[0010] As an improvement of the utility model, a feed guide rail is provided at the front end of the compression and inflation device, and a discharge guide rail is provided at the rear end corresponding to the outlet of the feed guide rail. The width of the gap between the feed guide rail and the discharge guide rail is greater than the diameter of the piston. A pick-up mechanism is provided outside the gap between the feed guide rail and the discharge guide rail. The pick-up mechanism is provided with a pick-up push rod. The setting direction of the pick-up push rod is perpendicular to the direction of the discharge guide rail. A pick-up push rod is provided. After detecting that the piston is unqualified, the pick-up push rod can push the unqualified piston from the gap between the feed guide rail and the discharge guide rail to the outside of the guide rail, thereby completing the screening.

[0011] As an improvement of the utility model, a feed conveyor belt is provided at the front end of the feed guide rail, a pushing mechanism is provided at the front end of the feed conveyor belt, the pushing mechanism is provided with a pushing rod, the pushing rod is provided at the front end corresponding to the inlet of the feed guide rail, the setting direction of the pushing rod is perpendicular to the direction of the feed conveyor belt, the pushing rod is provided at the front end corresponding to the inlet of the feed guide rail, and the piston to be detected on the feed conveyor belt is pushed into the feed guide rail by the pushing rod, which can effectively reduce manpower and material resources and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0013] Figure 1 It is a cross-sectional schematic diagram of the working state of the pressure inflation device of the utility model;

[0014] Figure 2 This is a schematic diagram of a mechanism for detecting the air hole structure of a piston of an automobile shock absorber according to the utility model;

[0015] Figure 3 This is a schematic top view of a mechanism for detecting the air hole structure of a piston of a shock absorber of an automobile according to the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the punching force sensor component of the utility model.

[0017] The marks in the above figure are: 1. Cylinder; 1.1. Movable push rod; 2. Compressing and inflating device; 2.1. Inflating tube; 2.2. Pressure head; 2.2.1. Intake channel; 2.3. Pressure sensing component; 2.3.1. Housing; 2.3.2. Mounting cavity; 2.3.3. Pressure sensor; 2.3.4. Circuit board; 2.3.5. Intake pipe; 3. Piston; 3.1. Cavity; 3.2. Through hole; 4. Feed guide rail; 5. Unloading guide rail; 6. Ejecting mechanism; 6.1. Ejecting push rod; 7. Feed conveyor belt; 8. Pushing mechanism; 8.1. Pushing push rod. DETAILED DESCRIPTION

[0018] In the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "planar direction", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] like Figures 1 to 4As shown, a mechanism for detecting the air hole structure of a shock absorber piston of an automobile comprises a cylinder 1, a compression and inflating device 2, and a piston 3. The cylinder 1 is provided with a movable push rod 1.1, and the piston 3 is provided with a cavity 3.1. A feeding guide rail 4 is provided at the front end of the compression and inflating device 2, and a discharge guide rail 5 is provided at the rear end corresponding to the outlet of the feeding guide rail 4. The width of the gap between the feeding guide rail 4 and the discharge guide rail 5 is greater than the diameter of the piston 3. A material removal mechanism 6 is provided outside the gap between the feeding guide rail 4 and the discharge guide rail 5. The material removal mechanism 6 is provided with a material removal push rod 6.1, and the setting direction of the material removal push rod 6.1 is perpendicular to the direction of the discharge guide rail 5. A feeding conveyor belt 7 is provided at the front end of the feeding guide rail 4, and a pusher is provided at the front end of the feeding conveyor belt 7. The push mechanism 8 is provided with a push rod 8.1, which is arranged at the front end corresponding to the inlet of the feed guide rail 4. The setting direction of the push rod 8.1 is perpendicular to the direction of the feed conveyor belt 7. The push rod 8.1 pushes the piston to be detected on the feed conveyor belt 7 into the feed guide rail 4. The compacting and inflating device 2 includes an inflating tube 2.1, a pressure head 2.2, and a pressure sensing component 2.3. The pressure head 2.2 is provided with an air inlet channel 2.2.1 inside. The inlet of the air inlet channel 2.2.1 is connected to the inflating tube 2.1. The shape of the lower surface of the pressure head 2.2 is adapted to the shape of the upper surface of the piston 3. The lower surface of the pressure head 2.2 is a downward convex conical surface. The movable push rod 1.1 pushes the pressure head 2.2 and the piston 3. The surface is tightly pressed, the upper surface of the piston 3 is a concave conical surface, the lower surface of the pressure head 2.2 and the upper surface of the piston 3 form a sealed environment, the outlet of the air inlet channel 2.2.1 is connected to the cavity 3.1, and the pressure sensor component 2.3 includes a shell 2.3.1, the interior of the shell 2.3.1 is provided with a mounting cavity 2.3.2, the interior of the mounting cavity 2.3.2 is provided with a pressure sensor 2.3.3 and a circuit board 2.3.4, the upper surface of the circuit board 2.3.4 is pressed against the upper surface of the mounting cavity 2.3.2, the lower surface of the circuit board 2.3.4 is pressed against the upper surface of the pressure sensor 2.3.3, the lower part of the shell 2.3.1 is provided with an air inlet pipe 2.3.5, and the pressure sensor 2.3.3 is directly The air inlet pipe 2.3.5 is arranged, one end of the air inlet pipe 2.3.5 is connected to the installation cavity 2.3.2, and the other end is connected to the air inlet channel 2.2.1. The gas enters the air inlet channel 2.2.1 through the air charging pipe 2.1, and the cavity 3.1 of the piston 3 is inflated through the air inlet channel 2.2.1. A part of the gas enters the air inlet pipe 2.3.5 of the pressure sensing component 2.3. The pressure sensor 2.3.2 detects the pressure, and transmits the pressure value to judge whether the detected piston can maintain pressure. The unqualified piston can maintain pressure because it has no through hole 3.2, and the pressure value is higher. The qualified piston cannot maintain pressure because it has a through hole 3.2, and the pressure value is lower, so the unqualified piston is screened out. If it is an unqualified piston, the material is removed by the ejection push rod 6.1 Push the unqualified piston out of the gap between the feed guide rail 4 and the discharge guide rail 5 to the outside of the guide rail, thus completing the screening. If it is a qualified piston, continue to the next piston test, and the qualified piston tested is transported out through the discharge guide rail 5. .

[0020] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A mechanism for detecting the air hole structure of a shock absorber piston of an automobile, comprising a cylinder (1), a compression and inflation device (2), and a piston (3), wherein the cylinder (1) is provided with a movable push rod (1.1), and the piston (3) is provided with a cavity (3.1), characterized in that: The compression and inflation device (2) comprises an inflation tube (2.1), a pressure head (2.2), and a pressure sensing assembly (2.3); an air intake passage (2.2.1) is provided inside the pressure head (2.2); an inlet of the air intake passage (2.2.1) is connected to the inflation tube (2.1); a pressure sensing assembly (2.3) is provided on the upper part of the pressure head (2.2); a lower end of the pressure sensing assembly (2.3) is connected to the air intake passage (2.2.1); the movable push rod (1.1) pushes the pressure head (2.2) to press against the upper surface of the piston (3) so that the outlet of the air intake passage (2.2.1) is connected to the cavity (3.1).

2. The mechanism for detecting the pore structure of a shock absorber piston of an automobile according to claim 1, characterized in that: The shape of the lower surface of the pressure head (2.2) matches the shape of the upper surface of the piston (3).

3. The mechanism for detecting the pore structure of a shock absorber piston of an automobile according to claim 1, characterized in that: The lower surface of the pressure head (2.2) is a downward convex conical surface, and the upper surface of the piston (3) is a downward concave conical surface.

4. The mechanism for detecting the pore structure of a shock absorber piston of an automobile according to claim 1, characterized in that: The pressure sensing assembly (2.3) comprises a shell (2.3.1), a mounting cavity (2.3.2) is arranged inside the shell (2.3.1), a pressure sensor (2.3.3) and a circuit board (2.3.4) are arranged inside the mounting cavity (2.3.2), an upper surface of the circuit board (2.3.4) abuts against an upper surface of the mounting cavity (2.3.2), a lower surface of the circuit board (2.3.4) abuts against an upper surface of the pressure sensor (2.3.3), an air intake pipe (2.3.5) is arranged at the lower part of the shell (2.3.1), the pressure sensor (2.3.3) is arranged opposite to the air intake pipe (2.3.5), and the air intake pipe (2.3.5) is connected to the mounting cavity (2.3.2).

5. The mechanism for detecting the pore structure of a shock absorber piston of an automobile according to claim 1, characterized in that: A feed guide rail (4) is provided at the front end of the compression and inflation device (2), and a discharge guide rail (5) is provided at the rear end corresponding to the outlet of the feed guide rail (4), the width of the gap between the feed guide rail (4) and the discharge guide rail (5) is greater than the diameter of the piston (3), and a material removal mechanism (6) is provided outside the gap between the feed guide rail (4) and the discharge guide rail (5), and the material removal mechanism (6) is provided with a material removal push rod (6.1), and the setting direction of the material removal push rod (6.1) is perpendicular to the direction of the discharge guide rail (5).

6. The mechanism for detecting the pore structure of a shock absorber piston of an automobile according to claim 5, characterized in that: A feeding conveyor belt (7) is provided at the front end of the feeding guide rail (4), a pushing mechanism (8) is provided at the front end of the feeding conveyor belt (7), the pushing mechanism (8) is provided with a pushing rod (8.1), the pushing rod (8.1) is arranged at the front end corresponding to the inlet of the feeding guide rail (4), and the setting direction of the pushing rod (8.1) is perpendicular to the direction of the feeding conveyor belt (7).

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