An air intake joint and an internal unloading device for an automobile air compressor

Abstract

The invention discloses an air inlet joint. The air inlet joint comprises a positioning segment, an exhausting segment and an air inlet channel which is through with the positioning segment and the exhausting segment; the positioning segment comprises a thread segment, an external thread is arranged on the peripheral circumference of the thread segment, exhausting holes are formed in the exhausting segment in the radial direction of the exhausting segment, and the exhausting holes are communicated with an exhausting channel; and the invention further discloses an inner unloading device for an automobile air compressor. The inner unloading device comprises a cylinder cover, a valve seat base plate and a valve seat plate which are sequentially arranged from top to bottom; a piston hole and an unloading hole are formed in the valve seat plate, and the above air inlet joint is arranged on an inlet of the piston hole; and an internal thread matched with the external thread is arranged in the piston hole, one end of the air inlet channel is connected with a pneumatic signal channel of an automobile air storage cylinder, and the other end of the air inlet channel is communicated with a feedback gas signal cavity. According to the air inlet joint and the inner unloading device, the structure of the valve seat plate and the structure of the cylinder cover are simplified, the manufacturing cost is reduced, and the response time of an unloading valve is shortened.

Description

technical field [0001] The invention belongs to the technical field of auto parts, in particular to an air intake joint and an internal unloading device for an auto air compressor. Background technique [0002] The brake air compressor for automobiles runs continuously with the automobile engine, so it has high working intensity, fast wear and high temperature, especially when it operates under the rated working pressure, it will increase its wear and power consumption. To avoid this phenomenon, an unloading system is usually designed on the cylinder head of the existing air compressor. When the inflation pressure of the air compressor into the air storage tank reaches the rated working pressure, the unloading system on the cylinder head is opened, and the air The compressor operates as usual, but it cannot pump air into the air storage tank, but discharges it from the air inlet. Therefore, the air compressor is running at no load, and the power of the air compressor is redu...

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Problems solved by technology

[0002] The brake air compressor for automobiles runs continuously with the automobile engine, so it has high working intensity, fast wear and high temperature, especially when it operates under the rated working pressure, it will increase its wear and power consumption. To avoid this phenomenon, an unloading system is usually designed on the cylinder head of the existing air compressor. When the inflation pressure of the air compressor into the air storage tank reaches the rated working pressure, the unloading system on the cylinder head is opened, and the air The compressor operates as usual, but it cannot pump air into the air storage tank, but discharges it from the air inlet. Therefore, the air compressor is running at no load, and the power of the air compressor is reduced to the minimum, which reduces the wear and tear of the air compressor and reduces the pressure of the air compressor. temperature, prolonging the service life of the air compressor

[0003] At present, the cylinder head design of the air compressor with internal unloading function is as follows: figure 1 As shown, its working principle is: in the unloading stage, the compressed air fed back by the system enters the cavity 4 through the interface 1, channel 2, and channel 3 in sequence, and then pushes the piston 5, which drives the pin 6, and drives the pin 6 The connected unloading valve piece 7 opens the unloading valve piece 7 to realize the unloading function. During this process, the feedback compressed air passes through a long path, and in order to realize the smooth transmission of compressed air, it is necessary to set up a joint on the cylinder head 1. Channel 2 and channel 3, the structural design is complex and the production cost is high

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