JPH02223837A - Bearing testing device - Google Patents

Abstract

PURPOSE:To obtain an accurate characteristic value by using a member which has elasticity to a force except in the direction of rotary torque to be measured as the probe of a force detector provided between a bearing housing and a fixation part. CONSTITUTION:The bearing testing device consists of a shaft 1 which places a load on a bearing 3 to be tested by rotation or swinging, a support bearing 2 which supports its one end, a bearing base 9 which holds the bearing 2 and is fixed to the fixation part 7, the bearing housing 6a which holds and fixes the plural bearings 3 to be tested while the bearings 3 are fitted in the other end of the shaft 1, a spring 4 and a set screw 10 for pressing a ring-shaped bearing housing 6b for placing a radial load on the bearings 3, the force detector 5 provided between the housing 6a and fixation part 7, and the flexible member 8 which has elasticity except in a tangential direction contacting the external diameter of the external shaft of the bearing 3 and the direction parallel to the end surface of an outer race. This member 8 is fixed directly to the projecting part 11 of the housing 6a, so forces except in the rotary torque direction are absorbed and accurate torque can be measured.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a bearing testing device.

[Conventional technology]

Conventionally, this type of bearing testing equipment rotates or oscillates the inner ring of the bearing under test, and measures the torque when the outer ring of the bearing under test is rotated by the frictional force at this time. They were looking for the characteristics of bearings or lubricants.

Although not shown in the drawings, this bearing testing device consists of a rotating shaft that is fitted into a support bearing of a bearing stand whose one end is attached to a fixed part, and a bearing to be tested that is fitted into the other end of the rotating shaft. A bearing housing that wraps around and holds the outer ring fixedly held therein, and a force detector that connects the bearing housing and the fixed part and measures the rotational torque of the outer ring of the bearing under test were provided.

When measuring the rotational torque of the bearing under test in one direction using this bearing testing device, the force detector is not directly connected to the bearing housing, but rather detects the force on the outer ring of the bearing under test, since the torque direction does not change. It was measured by applying a predetermined pressure to the probe of the container and making contact with it.

[Problem to be solved by the invention]

However, in the above-mentioned conventional bearing test equipment, the bearing housing and the fixed part are fixed only by the force detector, so vibration of the rotating shaft, swinging force due to eccentricity of the rotating shaft, etc. may cause the force detector to detect rotational torque. This causes problems such as noise in the measured values and damage to the force detector. Furthermore, when a force detector is used in contact, the direction of tension cannot be measured. When preloading is applied to measure this tensile force, the same problem as when directly attached occurs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a bearing testing device that can solve these problems and provide accurate characteristic values.

[Means to solve the problem]

The bearing testing device of the present invention measures the torque generated in the outer ring of the bearing under test by rotating or swinging the inner ring of the bearing under test, thereby determining the characteristics of the bearing under test or the characteristics of the lubricant. In the desired bearing testing device, a force detector for measuring the torque is provided between a bearing housing that fixes and holds the outer ring, and a fixed part, and a force detector that measures the torque in a tangential direction tangent to the outer diameter of the outer ring and an end face of the outer ring. and a bar-shaped member that protrudes from the force detector in a direction parallel to the parallel direction and is flexible in directions other than the protruding direction.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a sectional view of a bearing testing device showing one embodiment of the present invention, and FIG. 2 is a side view of FIG. 1. This bearing testing device consists of a shaft 1 that applies a load to a bearing under test 3 through rotation or rocking, a support bearing 2 that supports and supports one end of this shaft 1, and a support bearing 2 that holds this support bearing 2 and is fixed to a fixed part 7. a bearing pedestal 9 that is fitted into the other end of the shaft 1, a bearing housing 6a that holds and fixes a plurality of bearings 3 under test, and a bearing housing 6a that holds and fixes the bearings 3 under test; Spring 4 that presses down the ring-shaped bearing housing 6b that applies the load
and the set screw 10, the force detector 5 provided between the bearing housing 6a and the fixed part 7, the tangential direction tangent to the outer diameter of the outer ring of the bearing under test 3, and the direction parallel to the end surface of the outer ring. A rod-shaped visibility member 8 that protrudes from the force detector 5 in parallel directions and is visible in directions other than the protruding direction.
It consists of

This visibility member 8 protrudes from the end face of the force detector 5 fixed to the bracket 7a on the fixed part 7, and its tip is directly fixed to the protrusion 11 on the end face of the bearing housing 6a. Therefore, by attaching this flexible member 8, forces other than those in the rotational torque direction due to eccentricity, vibration, etc. of the shaft 1 and the support bearing 2 are absorbed, so that accurate torque measurement can be performed.

In addition, the force detector 5, which is structurally weak, will not be damaged because the flexible member 8 absorbs any force other than the direction.

〔Effect of the invention〕

As explained above, the present invention is to make the contact of the force detector provided between the bearing housing and the fixed part a member that is flexible against forces other than the direction of the rotational torque to be measured. This allows the flexible member to absorb forces in directions other than those in the measurement direction, resulting in a bearing testing device that can accurately measure force without damaging the force detector.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a bearing testing device showing one embodiment of the present invention, and FIG. 2 is a side view of FIG. 1. DESCRIPTION OF SYMBOLS 1... Shaft, 2... Support bearing, 3... Bearing under test, 4... Spring, 5... Force detector, 6a... Bearing housing, 6b... Ring-shaped bearing housing ,7...
Fixed part, 7a... Bracket, 8... Flexible member,
9...Bearing stand, 10...Set screw, 11...Protrusion part.

Claims (1)

[Claims] In a bearing testing device for determining the characteristics of the bearing under test or the characteristics of the lubricant by rotating or swinging the inner ring of the bearing under test and measuring the torque generated in the outer ring of the bearing under test, the outer ring a force detector for measuring the torque, which is provided between a bearing housing that fixes and holds the bearing housing, and a fixed part, and a direction parallel to a tangential direction tangent to the outer diameter of the outer ring and a direction parallel to the end surface of the outer ring A bearing testing device comprising: a rod-shaped member that protrudes from the force detector and is flexible in directions other than the direction in which it protrudes.