Novel experimental valve mechanism

Abstract

The utility model provides a novel experimental valve mechanism which is composed of a base, a lower tool, an upper tool and a valve, and the valve is composed of a piston, a valve spring, a guide sleeve, a partition plate and a limiting screw. The base is installed on an external sliding table air cylinder, tappets are convenient to install and take, the lower tool, the air valve and the upper tool are sequentially installed in the base from bottom to top, and the cam is arranged over the base. A guide sleeve of the valve is installed in the center of the partition plate, a piston penetrates into the guide sleeve to compress a valve spring between the piston and the guide sleeve, and a limiting screw is installed at the bottom of the piston to enable the valve to form an assembly. According to the utility model, various experiments of mechanical tappets and hydraulic tappets can be satisfied, products with different outer diameters and different extension heights can be compatible through simple tool replacement, and the test fixture is suitable for design verification experiments of tappet products and later process improvement verification experiments.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel valve mechanism for experiment, which is suitable for function experiment, performance experiment and durability test of tappet and belongs to the technical field of mechanical manufacturing. BACKGROUND

[0002] The design and process verification of any product in the manufacturing industry cannot be separated from experimental equipment, and the same is true for tappet production enterprises. For numerous models and different specifications and sizes of products, how to design and develop a compatible experimental equipment is a technical problem that needs to be broken through. The utility model is part of a full-function tappet experimental equipment and is the core functional mechanism of the equipment. SUMMARY

[0003] The utility model aims at providing a novel valve mechanism for tappet experimental equipment, which can meet various experiments of mechanical tappet and hydraulic tappet, and can be compatible with products of different outer diameters and different extension heights through simple replacement of tooling, and is very suitable for tappet production enterprises for design verification experiment and process improvement verification experiment of tappet products.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a novel valve mechanism for experiment, comprising a base, a lower tooling, an upper tooling and a valve, wherein the valve is composed of a piston, a valve spring, a guide sleeve, a partition plate and a limiting screw.

[0005] Preferably, the base is a cup-shaped structural part, four mounting holes are arranged at the lower part for fixing the mechanism on an external slide cylinder; a gas pressure balance hole is designed at the bottom for eliminating the high-low pressure difference generated during the up-down movement of the tappet; an oil inlet is arranged on the middle-upper part of the cup wall; and a "Z"-shaped oil overflow channel is arranged at the top.

[0006] Preferably, the inner hole diameter of the upper tooling can be defined according to the specific tappet to adapt to products of different outer diameters and sizes; the height of the upper tooling and the lower tooling is fixed together with the thickness of the partition plate, and the height of the upper tooling and the lower tooling is adjusted, so that the height position of the valve changes accordingly, thereby realizing the compatibility of tappets of different extension heights.

[0007] Preferably, the piston is a "T"-shaped part, the top surface is a large-diameter spherical surface (the surface arch height is about 0.02 mm), the purpose of this design is to ensure that the contact force between the tappet and the valve is on the axis, thereby avoiding additional wear caused by deflection of the contact force; a large-size inner chamfered conical surface is designed on the middle-upper part, which can realize self-positioning of the valve spring; and a threaded hole is formed at the bottom to connect the limiting screw.

[0008] Preferably, the guide sleeve is a hollow sleeve part, the inner hole is cylindrical at the upper part and forms a guide pair with the piston; and the lower part is designed as a small-angle horn mouth to reduce the loss of lubricating oil and improve the lubrication effect.

[0009] Compared with the prior art, the utility model has the advantages that: 1. by changing upper and lower tooling, equipment can be compatible with different outer diameter, different extension height's tappet product;2. the optimization design of internal structure parts reduces the interference source of experimental equipment itself, so that the experimental result is more accurate;3. the experimental equipment of the utility model is compatible equipment, which can reduce the investment of factory to equipment. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structure schematic diagram of the utility model.

[0011] Figure 2 It is the base isometric view.

[0012] Figure 3 It is the piston sectional view

[0013] Figure 4 It is the guide sleeve sectional view.

[0014] In the drawing: 1-base, 2-lower tooling, 3-upper tooling, 4-valve, 5-hydraulic tappet, 6-cam, 401-piston, 402-valve spring, 403-guide sleeve, 404-baffle, 405-limiting screw, A1-mounting hole, B1-oil inlet, C1-oil overflow channel, D1-air pressure balance hole, A401-large diameter spherical surface, B401-inward chamfered conical surface. DETAILED DESCRIPTION

[0015] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0016] As Figure 1 Shown, base (1) is installed on the external slide table cylinder through four mounting holes (A1) in the bottom, and the lower tooling (2), valve (4) and upper tooling (3) are sequentially installed in the base (1) from bottom to top, the hydraulic tappet (5) is placed in the upper tooling (3) (a cup-shaped hydraulic tappet is used in the embodiment), and the cam (6) is directly above;Experimental equipment can load and unload the hydraulic tappet (5) in the utility model and replace the upper tooling (3) and lower tooling (2) by operating the slide table cylinder.

[0017] The cylindrical bottom of the base (1) is designed with an air pressure balance hole (D1) for eliminating the high and low pressure difference generated during the up and down movement of the hydraulic tappet (5); the cup wall of the middle and upper part has an oil inlet (B1) connected with an oil supply pipe outside and communicated with an oil groove inside, and the oil groove is connected with the oil channel of the hydraulic tappet (5); the top of the base (1) is arranged with a "Z"-shaped oil overflow channel (C1) to prevent the accumulation of oil from splashing.

[0018] The assembly of the valve (4) is as follows: first, the guide sleeve (403) is screwed into the threaded hole of the partition plate (404), and the upper end of the guide sleeve (403) is placed into the valve spring (402); then, the piston (401) is inserted into the guide sleeve (403) through the valve spring (402); finally, the piston (401) is pressed at the top end, the limiting screw (405) is screwed into the bottom screw hole of the piston (401) and tightened, and at this time, the assembly of the valve (4) is completed.

[0019] In use, the lower tooling (2), the valve (4) and the upper tooling (3) are sequentially placed into the base (1), and then the hydraulic tappet (5) of the corresponding tooling is operated, the slide table cylinder of the equipment, the oil pump and the cam can be used for various verification experiments.

[0020] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A new experimental valve mechanism, comprising a base (1), a lower tooling (2), an upper tooling (3), a valve (4), characterized in that: The base (1) is installed on the external slide cylinder, facilitating the installation and removal of the hydraulic tappet (5). The base (1) is sequentially installed with the lower tooling (2), the valve (4) and the upper tooling (3) from bottom to top, and the cam (6) is arranged right above.

2. A novel experimental valve train as claimed in claim 1, wherein: The valve (4) is composed of a piston (401), a valve spring (402), a guide sleeve (403), a partition plate (404) and a limiting screw (405). The guide sleeve (403) is installed in the center of the partition plate (404), the piston (401) penetrates into the guide sleeve (403), the valve spring (402) is compressed between the piston (401) and the guide sleeve (403), and the limiting screw (405) is installed at the bottom of the piston (401).

3. A novel experimental valve train as claimed in claim 1, wherein: The base (1) is a cup-shaped structure part, the lower part is provided with four mounting holes (A1) and one air pressure balance hole (D1), the middle and upper part of the cup wall is provided with an oil inlet (B1), and the top is provided with a "Z"-shaped oil overflow channel (C1).

4. A novel experimental valve train as claimed in claim 2, wherein: The piston (401) is a "T"-shaped part, the top surface is a large-diameter spherical surface (A401), the middle and upper part is designed with a large-size inner chamfered conical surface (B401), and the bottom is provided with a threaded hole.

5. A novel experimental valve train as claimed in claim 2, wherein: The guide sleeve (403) is a hollow sleeve part, the upper part of the inner hole is cylindrical, and the lower part is designed as a small-angle horn mouth.

Images