CN201653315U - Valve beating inspection tool - Google Patents

Abstract

The utility model discloses a valve beating tester, which aims to overcome the defect of poor positioning accuracy of measuring valves in the prior art, provide a simple and accurate positioning reference, increase axial positioning, and improve testing accuracy. The main points are: Including the base, two pairs of identical spherical support pads are symmetrically fixed on both sides of the same common tangent plane perpendicular to the base, and a single spherical support pad is fixed on the base, and the center of the single spherical support pad is within the above-mentioned common tangent plane , each of the two pairs of spherical support pads is symmetrically arranged by the same steel ball along the two sides of the same common tangent plane and is tangent to each other; the distance between the two pairs of spherical support pads is a quarter of the length of the measured valve stem to three-quarters; the distance between a single spherical outrigger relative to its closest pair of spherical outriggers is one-fifth to three-fifths of the length of the valve stem. The utility model increases the stability of the positioning of the valve, controls the axial movement of the valve, and increases the detection function of the beating of the end face.

Description

Valve beating inspection tool

technical field

The utility model belongs to the field of engines, in particular to a detection device for engine valves.

Background technique

With the development of automobile engine technology, the performance requirements of each component are also gradually upgraded. As one of the key parts, the machining accuracy of the valve should attract much attention; for the detection of the valve, in addition to the general dimensional accuracy measurement, it is also necessary to The shape and position relationship are strictly tested, including the cylindricity of each section of the valve cylinder, the coaxiality of the relevant cylindrical surface, and the perpendicularity of each end to the axis. In actual testing, it is widely used to detect the above-mentioned various Item shape and position accuracy requirements; detection of valve beating, the prior art is to place the valve stem on the V-shaped seat and rotate slowly, and then test the beating amount against the surface to be tested with a testing instrument, which is an extremely delicate work. For example, Chinese Patent No. ZL200420060543.4, which is a patent titled a valve detector, includes a workbench base, a power output device that doubles as a pressing mechanism, a V-shaped fixture for placing the object to be tested, and an inductance meter, which doubles as the power of the pressing mechanism. The output device and the V-shaped fixture are respectively arranged on both sides of the base of the workbench; at least two parallel electronic sensors are arranged on one side of the V-shaped fixture, and one end of the V-shaped fixture is also provided with an electronic sensor for a tapered oblique circular runout; the The electronic sensors are respectively connected with the inductance measuring instruments through wires. This detector uses a traditional V-shaped fixture to support the valve to be tested, but this detection method has the following shortcomings:

1. The processing accuracy of the V-shaped surface of the V-shaped fixture is not high, or the accuracy of the positioning reference surface is poor, and it is easy to cause the valve stem to swing when supported by the V-shaped surface;

2. There are burrs or sharp corners on both sides of the V-shaped fixture, which can easily damage the accuracy of the valve stem;

3. When the valve rotates, it is easy to move back and forth, and the axial positioning accuracy is poor.

Contents of the invention

The technical problem to be solved by the utility model is to overcome the defects of poor positioning reference surface accuracy and poor axial positioning accuracy of the V-shaped clamp used for valve measurement in the prior art, and provide a valve detection device for an engine, which adopts a positioning reference as simple as possible, And increase the axial positioning to improve the test accuracy.

The purpose of this utility model is achieved through the following technical solutions: a valve beating checker, including a base, and two pairs of identical spherical support pads are symmetrically and sequentially fixed on both sides of the same common tangent surface perpendicular to the base, and A single spherical support pad is fixed on the base, and the center of the single spherical support pad is in the above-mentioned common tangent plane. Each pair of the two pairs of spherical support pads is formed by two identical steel balls along the same common The two sides of the cut surface are arranged symmetrically and are tangent; the distance between the two pairs of spherical support pads is 1/4 to 3/4 of the length of the measured valve stem; the single spherical support pad is relative to the closest one The distance between the spherical support pads is 1/5 to 3/5 of the length of the valve stem.

The spherical support pad can be a standard steel ball, and the diameter of the steel ball is 1 to 2 times the diameter of the valve stem to be tested.

Preferably, the diameters of the steel balls of the two pairs of spherical support pads are all the same; the diameter of the steel balls of the single spherical support pad is larger than the diameter of the steel balls of the two pairs of spherical support pads.

The beneficial effects of the utility model are:

1. Increased the stability of valve positioning;

2. The smooth steel ball will not damage the valve;

3. Control the axial movement of the valve;

4. Added the detection function of end face beating.

Description of drawings

Fig. 1 is the structural representation of a kind of embodiment of the utility model;

FIG. 2 is a schematic right view of FIG. 1 .

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is further described.

Embodiment 1: In Fig. 1, a valve beating checker includes a base 1, and two pairs of identical spherical support pads 2 are sequentially and symmetrically fixed on both sides of the same common tangent surface 5 perpendicular to the base 1, and two pairs of spherical support pads are arranged symmetrically. Each pair of pads 2 is composed of two identical steel balls 21 arranged symmetrically and tangent to both sides of the same common tangent plane, and each of the two pairs of steel balls is fixedly connected to the base 1 by a fixed rod 22, and the fixed rod 22 The heights are all equal; another single spherical support pad 3 is fixed on the base 1 by a fixed rod 31, and the center of the single spherical support pad 3 is in the above-mentioned common tangent plane; the distance A between two pairs of spherical support pads is the measured 1/4 to 3/4 of the length of the valve stem; the distance B between a single spherical support pad and the closest pair of spherical support pads is 1/5 to 3/5 of the length of the valve stem.

The spherical support can be standard steel balls or special non-standard steel balls. The diameter of the two pairs of steel balls is 1.5 times the diameter of the valve stem to be tested; the diameter of the steel ball of a single spherical support is larger than that of the two pairs of spherical support. The diameter of the steel ball of the pad; the diameter of a single large steel ball is Φ32mm, and the diameter of two pairs of small steel balls is Φ14mm. Two pairs of small steel balls are tangent in pairs, and the valve to be tested is placed on the two pairs of steel balls, which can make the rotation of the valve stable during the test; a single large steel ball prevents axial movement during the test rotation of the valve; the single large steel ball The height of the ball center is equal to the axis of the measured valve. the

The base 1 is a 150mm×60mm×20mm steel plate, and the upper surface of the base 1 is processed to keep it flat; there are four adjusting feet 4 composed of adjusting screws on the lower and outer sides of the base 1, which are used to adjust the level of the upper surface of the base , and ensure that the base is placed stably.

Pillow the valve stem of the valve to be tested on two pairs of steel balls, and the top of the valve is supported by a large steel ball, and then point the measuring heads of the test instrument, such as a dial gauge or torsion spring gauge, to the parts of the valve to be tested, and then Turn the valve, you can read the measurement data on the instrument.

Claims (4)

1. A valve beating test tool, characterized in that it includes a base, and two pairs of identical spherical support pads are fixed symmetrically on both sides of the same common cut surface perpendicular to the base, and a single spherical support pad is fixed on the said On the base, the center of the single spherical support pad is in the above-mentioned common tangent plane, and each pair of the two pairs of spherical support pads is symmetrically arranged and tangent to both sides of the same common tangent plane by two identical steel balls; The distance between the two pairs of spherical support pads is 1/4 to 3/4 of the length of the measured valve stem; the distance between the single spherical support pad and the closest pair of spherical support pads is One-fifth to three-fifths of the length of the valve stem. 2 . The valve bounce inspection tool according to claim 1 , wherein the two pairs of spherical support pads are standard steel balls, and the diameter of the steel balls is 1 to 2 times the diameter of the valve stem to be tested. 3 . 3. The valve beating test tool according to claim 2, wherein the diameters of the steel balls of the two pairs of spherical support pads are all the same. 4. The valve beating test tool according to claim 1, 2 or 3, wherein the steel ball diameter of the single spherical support pad is larger than the steel ball diameter of the two pairs of spherical support pads.

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