JPH04121482U - oil-less air compressor - Google Patents

Abstract

(57) [Summary] [Purpose] Eliminates the need for a breather valve, alleviates restrictions on installation, prevents increase in number of parts, and achieves high efficiency by reducing workload during the suction stroke. [Structure] A casing body 1 consisting of a cylinder liner 2, a cylinder head 3, and a crankcase 4 is connected to the inside of the crankcase 4 through an intake port 11 of the cylinder head 3.
A hole 16 is formed to communicate with the crankcase 4 to prevent pressure from increasing inside the crankcase 4.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention relates to oil-less air compressors installed in automobiles, etc. be.

0002

[Conventional technology]

Conventionally, air compressors installed in automobiles, etc. are oil-lubricated. During the compression stroke, the piston ring and inside of the cylinder are removed from the cylinder chamber. Air leaking into the crankcase through the gap with the wall causes damage inside the crankcase. In order to prevent the pressure from rising and worsening the behavior of the piston, the crankcase The inside of the crankcase of the engine communicates with the inside of the engine, and is provided in the engine. The air compressor is equipped with a breather for releasing blow-by gas. The internal pressure of the rank case was prevented from increasing.

0003 However, in the case of oil-lubricated air compressors, the compressed air discharged To prevent oil mist from entering the piston ring, use a material with high self-lubricating properties. material or surface treatment, and crankshaft journal bearings and components. Grease is packed in the rod small end bearing and connecting rod large end bearing. Using a so-called oil-less air compressor that uses roller bearings It is believed that

0004 Simply replace the traditional oil-lubricated air compressor with an oil-less air compressor. If you try to share the engine breather using a Engine oil enters the crankcase side of the oilless air compressor from the base side. As a result, the output is the same as when using an oil-lubricated air compressor. Oil mist will be mixed into the compressed air.

[0005] Therefore, in order to use an oil-less air compressor, as shown in Figure 2, , attach the breather valve 15 to the crankcase 4, and reduce the pressure inside the crankcase 4. If the force exceeds the set value, the breather valve 15 is opened to drain the air inside the crankcase 4. If the internal pressure is below the set value, the breather valve 15 must be closed to prevent dust, etc. from entering from the outside.

[0006] In the figure, 1 indicates the cylinder liner 2, cylinder head 3, crankcase 4, etc. 5 is a cylinder chamber, 6 is a piston, and 7 is a piston lip. 8 is connecting rod, 9 is crankshaft, 10 is crankshaft jar Null bearing, 11 is the intake port with the intake valve 13, 12 is the discharge A discharge port provided with a valve 14, 17 a connecting rod small end bearing, 18 is the connecting rod big end bearing.

[0007]

[Problem that the idea aims to solve]

However, as mentioned above, the breather valve 15 in the oil-less air compressor If the breather valve 15 is installed, the breather valve 15 will protrude outside, so the oil As the installation restrictions for Lures air compressors become greater, the number of parts also increases. There was a problem.

[0008] In view of these circumstances, the present invention eliminates the need for a breather valve and improves efficiency. The present invention aims to provide an oil-less air compressor that can achieve the following.

[0009]

[Means to solve the problem]

This invention consists of a cylinder liner, cylinder head, and crankcase. Connect the inside of the crankcase to the intake port of the cylinder head on the singe body. It is characterized by having a hole for tightening.

0010

[Effect]

Therefore, when operating an oil-less air compressor, compressed air is removed from the cylinder chamber. Even if it leaks into the crankcase, the pressure inside the crankcase will not increase, and Air leaking into the crankcase will flow through the hole to the intake port. As a result, the pressure on the intake side increases accordingly, so the amount of work done by the piston during the intake stroke increases. This will reduce the amount of electricity and improve efficiency.

[0011]

【Example】

Embodiments of the present invention will be described below based on the drawings.

0012 Figure 1 shows one embodiment of the present invention, and parts in the figure with the same symbols as in Figure 2 are the same. The basic structure is the same as the conventional one shown in Figure 2, but the actual The feature of this embodiment is that, as shown in Fig. 1, the cylinder liner 2 and cylinder head The crankcase 4 is attached to a casing main body 1 consisting of a housing 3 and a crankcase 4. At the point where a hole 16 is bored to communicate the inside with the intake port 11 of the cylinder head 3. be.

[0013] With the configuration as described above, when operating an oil-less air compressor, the cylinder chamber Compressed air from 5 passes through the gap between the piston ring 7 and the inner wall of the cylinder to the crankcase. Even if it leaks into the crankcase 4, the pressure inside the crankcase 4 will not increase, and the Air leaking into the crankcase 4 flows through the hole 16 to the intake port 11. As a result, the pressure on the intake side increases accordingly, so the pressure of the piston 6 during the intake stroke increases. Reduces workload and improves efficiency.

[0014] In this way, as shown in FIG. 2, without providing the breather valve 15, This prevents pressure from rising inside the link case 4, and the breather valve 15 protrudes to the outside. This makes it possible to downsize the oil-less air compressor. Restrictions are relaxed, there is no need to increase the number of parts, and there is no need to increase the number of parts during the suction stroke. This also helps improve efficiency as the amount of work of the piston 6 is reduced.

[0015] Note that the oil-less air compressor of the present invention is limited only to the above-mentioned embodiments. However, various changes may be made without departing from the gist of the invention. Of course.

[0016]

[Effect of the idea]

As explained above, according to the oil-less air compressor of the present invention, the breather No valves are required, which eases installation constraints and prevents an increase in the number of parts. Furthermore, it has the excellent effect of increasing efficiency by reducing the amount of work during the suction stroke. can be played.

[Brief explanation of drawings]

FIG. 1 is a side sectional view of an embodiment of the present invention.

FIG. 2 is a side sectional view of an oil-less air compressor that has been recently considered.

[Explanation of symbols]

1 Casing body 2 Cylinder liner 3 Cylinder head 4 Crank case 11 Intake port 16 holes

Claims (1)

[Scope of utility model registration request] 1. An oil-less air compressor, characterized in that a casing body consisting of a cylinder liner, a cylinder head, and a crankcase is provided with a hole for communicating the inside of the crankcase with an intake port of the cylinder head.