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Hermetically sealed rush adjuster

一种气门间隙、调节器的技术，应用在机器/发动机、阀装置、机械设备等方向，能够解决损害气门间隙调节器功能等问题

Inactive Publication Date: 2011-09-14
TOYOTA JIDOSHA KK +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the function of the lash adjuster is sometimes impaired due to these factors.

Method used

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  • Hermetically sealed rush adjuster
  • Hermetically sealed rush adjuster
  • Hermetically sealed rush adjuster

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] figure 1 It is a diagram schematically showing a sealed lash adjuster (hereinafter, also simply referred to as a lash adjuster) 100A of the present embodiment. The lash adjuster 100A has a main body 1 , a plunger 2A, a check valve 3 , a plunger spring 4 , a first seal member (first seal mechanism) 5 , a ball plug 6 , and a cap holder 7 as basic structures.

[0025] The main body 1 is a bottomed cylindrical member, and a plunger 2A is slidably inserted in the cylinder in a direction parallel to the central axis. At the front end portion of the main body 1, a cap holder 7 for restricting protrusion of the plunger 2A is arranged. The cap holder 7 functions as a stopper for the plunger 2 , and does not have a function of sealing liquid that may enter from the outside. The plunger 2A is a columnar member and has a storage chamber 10 formed therein. In addition, the storage chamber 10 may be formed in an appropriate shape. An injection hole 2aA for injecting oil (liquid) ...

Embodiment 2

[0035] figure 2 It is a figure schematically showing the structure of the lash adjuster 100B of this embodiment. The lash adjuster 100B has the same basic structure as the lash adjuster 100A shown in the first embodiment except that the plunger 2A is changed to the plunger 2B. On the other hand, the lash adjuster 100B has a second sealing member 20B and its associated structures instead of the second sealing member 20A and its accompanying structures (first and second covers 21, 22) as parts other than the basic structure. It differs from the lash adjuster 100A in terms of an accompanying structure (holder 23 ).

[0036] Also in this embodiment, the second sealing member 20B is formed and arranged to seal the exposed portion of the plunger 2B and cover the gap K. As shown in FIG. On the other hand, in this regard, the second sealing member 20B is specifically formed and arranged as follows in the present embodiment. In addition, in this embodiment, the second sealing membe...

Embodiment 3

[0041] image 3 It is a diagram schematically showing the structure of a lash adjuster 100C of this embodiment. The lash adjuster 100C has the same basic structure as the lash adjuster 100A shown in the first embodiment except that the plunger 2A is changed to the plunger 2C. In addition, the plunger 2C is the same as the plunger 2B shown in Example 2. On the other hand, the lash adjuster 100C has a second sealing member 20C and its accompanying structure (holder 23 ) instead of the second sealing member 20A and its accompanying structure as a part other than the basic structure. Above, it is different from the lash adjuster 100A.

[0042] Also in this embodiment, the second sealing member 20C is formed and arranged to seal the exposed portion of the plunger 2C and cover the gap K at the opening end portion of the main body 1 . On the other hand, in this regard, the second sealing member 20C is specifically formed and arranged as follows in the present embodiment. In addit...

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PUM

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Abstract

A hermetically sealed rush adjuster (100A) comprises a plunger (2A), a body (1) into which the plunger (2A) is inserted, a first seal member (5) provided between the plunger (2A) and the body (1), and a second seal member (20A) which can prevent or constrain intrusion of engine oil from the outside. The second seal member (20A) is arranged to seal a part of the plunger (2A) exposed from the body (1) and to cover a gap (K) formed between the opening end of the body (1) and the plunger (2A). The second seal member (20A) is provided with one end portion (20aA) and the other end portion (20bA) assealing parts having a function for preventing or constraining intrusion of engine oil from the outside.

Description

technical field [0001] The present invention relates to a sealed valve clearance adjuster, in particular to a sealed valve clearance adjuster with a sealing mechanism between a plunger and a main body. Background technique [0002] At present, a lash adjuster capable of automatically adjusting the valve clearance provided between the intake and exhaust valves of the internal combustion engine and the cylinder head to substantially zero has been put into practical use. According to the lash adjuster, it is possible to functionally eliminate the noise generated by the interference between the intake and exhaust valves and the cylinder head. In addition, in terms of maintenance, it is not necessary to periodically check and adjust the valve clearance. As the lash adjuster, there is an external oil supply type using engine oil, for example. In the case of the external oil supply type lash adjuster, if the injection amount of the engine oil is inappropriate, or if degraded oil ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01L1/24
CPCF01L2101/00F01L1/2405F01L2109/00F01L2820/01F01L2001/2433F01L1/24F01L2301/00F01L2309/00
Inventor 胜间田正司保坂明彦
Owner TOYOTA JIDOSHA KK
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