CN220418329U - Novel pairing angular contact ball bearing axial clearance measurement device - Google Patents

Abstract

The utility model belongs to the field of general machinery, and particularly relates to a novel axial clearance measuring device for a pairing angular contact ball bearing. The bearing that awaits measuring is installed between main shaft and frock cover shell, and this main shaft and end cover compress tightly through the cooperation of bolt with the bearing inner race that surveys, and frock cover shell compresses tightly through the cooperation of bolt with the cover and the bearing outer lane that surveys, and inside and outside spacer ring of equithickness is installed between two sets of bearings that await measuring, its characterized in that: the dead weight of the main shaft and the tooling sleeve shell is used as accessory load, so that the inner ring and the outer ring of the bearing can reach the upper limit displacement and the lower limit displacement respectively. Certain gaps are reserved among the tooling sleeve shell, the sleeve cover, the main shaft and the shaft end cover, the tooling sleeve shell is designed into a boss or clamping groove structure, and relative axial movement of the inner ring and the outer ring of the bearing on the main shaft and the tooling sleeve shell is limited by screwing bolts, so that accuracy of measured values is ensured. The utility model has simple operation, high reliability and high practicability.

Description

Novel pairing angular contact ball bearing axial clearance measurement device

Technical Field

The utility model belongs to the technical field of general machinery, and is particularly suitable for measuring axial clearance of a matched angular contact ball bearing in a rotary machine.

Background

Bearings are the most important parts in modern machines, and are the supporting elements of the rotating machine, which support the shaft and the parts on the shaft, guide the rotational movement of the shaft and ensure the rotational accuracy of the shaft. Therefore, during the operation of the mechanical equipment, the bearing performance directly affects the stability and safety of the operation of the equipment. For the influence factors of the bearing performance, the most important point is that the working clearance of the bearing is selected, the working clearance is too small, the bearing is locked, the friction resistance is increased, the temperature of the bearing is increased, and the bearing can be burnt to stop working when serious; if the working clearance is too large, the number of actual bearing is reduced, the service life of the bearing is influenced, and meanwhile, the vibration and noise of equipment are increased, so that reasonable working clearance must be selected according to the application condition of parts. The working clearance is related to the original clearance of the bearing when leaving the factory, the matching condition of the bearing, the shaft and the bearing seat when being installed, the expansion caused by the working temperature difference of the bearing, and the like, and particularly for a grease lubrication bearing, the temperature difference between the inner spacer ring and the outer spacer ring is larger, so that the working clearance is strictly controlled. Because the working clearance of the parts cannot be measured when the parts run, the reasonable range of the original clearance of the bearings can be reversely calculated according to the calculated expansion amount and the interference or clearance amount during installation, the original clearance of the bearings is measured through an instrument, and then the size of the clearance is changed through axial pre-tightening and axial spacer thickness adjustment, so that the clearance meets the use requirements of the parts, the service life of the bearings is prolonged, and the adverse effect of improper clearance selection is eliminated.

The bearing clearance is divided into axial clearance and radial clearance, a certain proportion relation exists between the axial clearance and the radial clearance, and the proportion coefficients of different types of bearings are different. When the clearance of the single-row angular contact ball bearing is measured, a clearance gauge method and a dial gauge method are generally adopted, the clearance gauge method is used for measuring the radial clearance, and the error is large, so that the dial gauge method is most commonly used for measuring the axial clearance. For the paired angular contact ball bearings, if the respective axial plays are measured respectively, accumulated errors are generated, the equipment for measuring the original plays of the paired bearings is less in the market, the design structure is complex, pneumatic cylinders, pressure reducing valves and the like are needed, and the operation is complex. Therefore, the axial clearance of the paired angular contact bearings is measured at present by measuring the installed clearance of the paired angular contact bearings through a dial indicator method after the paired angular contact bearings are assembled to the bearing box, but the paired angular contact bearings are required to be disassembled, repaired, installed and measured again if the clearance is required to be adjusted after the paired angular contact bearings are assembled, so that time and labor are wasted, and the paired angular contact bearings are inconvenient.

Disclosure of Invention

The utility model aims to overcome the defects and provide a novel axial clearance measuring device for a paired angular contact ball bearing, so that the bearing clearance is measured more reliably, more practically and more conveniently.

The technical scheme of the utility model is as follows: the utility model provides a novel pair angular contact ball bearing axial play measurement device, the device includes main shaft, end cover, equal thickness inner and outer spacer ring, frock cover shell, cover, bolt, and the bearing that awaits measuring is installed between main shaft and frock cover shell, and this main shaft and end cover pass through the bolt and compress tightly with the cooperation of survey bearing inner race, and frock cover shell compresses tightly through the bolt and cooperation of survey bearing outer lane with the cover, and equal thickness inner and outer spacer ring is installed between two sets of bearings that await measuring, its characterized in that: the main shaft is designed into the step shaft, the bearing inner ring is positioned through the shaft shoulder at the step, the threaded holes are formed in the upper end face and the lower end face of the main shaft, the threaded holes in the upper side are used for lifting, the threaded holes in the lower side are connected with the end cover in a matched mode, the end cover is designed into a T-shaped step, a countersunk threaded hole is formed in the upper end face and the upper end face of the end cover in a matched mode, a certain gap is reserved between the lower end face of the main shaft and the upper end face of the end cover, the main shaft and the end cover are guaranteed to be in threaded connection through bolts, the bearing inner ring can be completely compressed, the tool sleeve shell is designed into a clamping groove structure, the bearing outer ring is positioned through the step and limited, the threaded holes are formed in the upper end face and the side face of the tool sleeve, the threaded holes in the side face of the tool sleeve are used for lifting and overturning, the threaded holes in the lower side are connected with the sleeve cover in a matched mode, the sleeve cover is in a boss structure, the sleeve cover is matched with the other side of the bearing outer ring, a certain gap is reserved between the sleeve cover and the tool sleeve, the sleeve cover can be compressed on the bearing outer ring after the sleeve is connected through bolts, the main shaft, the inner spacer ring and the tool sleeve are made of 45 steel, and the sleeve cover are used for being made of 35 steel.

The utility model has the beneficial effects that: the self weight of the main shaft and the tooling sleeve shell is used as accessory load without complex hydraulic devices or decompression equipment, so that the inner ring and the outer ring of the bearing can reach the upper limit displacement and the lower limit displacement respectively. Meanwhile, a certain gap is reserved between the tool casing and the sleeve cover, between the main shaft and the shaft end cover, the bearing can be completely pressed by tightening the bolt, the axial relative movement of the inner ring and the outer ring of the bearing in the main shaft and the tool casing is limited, and the accuracy of measured values is ensured. Meanwhile, a pair of inner and outer spacer rings with equal thickness are arranged between the two bearings to be measured, after the bearing clearance is measured, the inner and outer spacer rings are knocked to enable the inner and outer spacer rings to eccentrically incline to one side of the main shaft, a part of the inner and outer spacer rings is extruded between the two bearings to form a natural handle, the upper bearing can be lifted more conveniently, and the two disc bearings can be removed more rapidly. The novel measuring device is convenient and accurate to position, high in concentricity, convenient to install and detach, simple to operate, capable of greatly saving the detection time of factory to the clearance of the matched set bearings, and capable of improving production efficiency.

Drawings

Fig. 1 is a schematic structural view of a measuring device according to the present utility model.

Fig. 2 is a schematic view of the structure of the measuring device of the present utility model when the bearing is disassembled.

In the drawings, the corresponding technical features are noted as follows:

1-tooling shell, 2-inner and outer spacer rings with equal thickness, 3-main shaft, 4-shaft end cover, 5-sleeve cover, 6-bolt I and 7-bolt II.

Detailed Description

The utility model is further described below with reference to the drawings and examples.

When the utility model is implemented, as shown in figures 1 and 2, the main shaft (3) is vertically placed on the flat ground after being turned up and down, steps are arranged down, the matched bearing to be tested and the inner and outer spacer rings (2) with equal thickness are assembled into the main shaft (3) from top to bottom, the outer ring of the bearing is coiled for 20 circles after the bearing is assembled in place, the friction influence among the bearings is eliminated, the shaft end cover (4) is pressed on the inner ring of the bearing, and the bolt I (6) is screwed into countersunk threaded holes on the main shaft (3) and the shaft end cover (4) by a certain moment. Placing the tooling sleeve shell (1) on a hollow platform after lifting, placing a step on the hollow platform, lifting the assembled main shaft (3), the uniform-thickness inner and outer spacer rings (2) and the shaft end cover (4) integrally after stabilizing the steps, placing the bearing to be tested into the step of the tooling sleeve shell (1), placing the sleeve cover (5) on the uppermost surface of the tooling sleeve shell (1), and screwing the bolt II (7) into the threaded holes of the tooling sleeve shell (1) and the sleeve cover (5) by using a certain moment to fully compress the bearing outer ring. During measurement, the measuring device is turned up and down as shown in fig. 1 and placed on a flat ground, the sleeve cover (5) is landed, the bearing inner ring naturally sags under the action of self and main shaft gravity and does not contact with the flat ground, then 1 time of numerical value is recorded on the upper end surface of the main shaft by using a dial indicator at every 90 degrees of circumference, and the total number of the data is 4. After the recording is completed, the whole measuring device is pulled upwards by screwing the hoisting screw into the lifting hole on the upper end surface of the main shaft, the complete ground separation of the sleeve cover (5) is ensured, the outer ring of the bearing naturally sinks by means of the gravity of the tooling sleeve shell (1), after the device is stable, the new 4 groups of data are recorded on the upper end surface of the main shaft by using a dial indicator every 90 degrees apart on the circumference by using the same method, the difference value of the two measured data is calculated, and the average value of the four groups of difference values is taken, so that the axial play data of the measured paired bearings is obtained.

Claims (2)

1. The utility model provides a novel pair angular contact ball bearing axial play measurement device, the device includes main shaft, end cover, the inside and outside spacer ring of equal thickness, frock cover shell, cover, bolt, and the bearing that awaits measuring is installed between main shaft and frock cover shell, and this main shaft and end cover compress tightly through the cooperation of bolt with the bearing inner race that surveys, and frock cover compresses tightly through the cooperation of bolt with the bearing outer lane that surveys with the cover, and the inside and outside spacer ring of equal thickness is installed between two sets of bearings that await measuring, its characterized in that: the main shaft is designed into a stepped shaft, the bearing inner ring is positioned through a shaft shoulder at the step, the upper end face and the lower end face of the main shaft are provided with threaded holes, the upper threaded holes are used for hoisting, the lower threaded holes are connected with the end cover in a matched manner, the end cover is designed into a T-shaped step, a countersunk threaded hole is formed in the matched manner with the main shaft, a certain gap is reserved between the lower end face of the main shaft and the upper end face of the end cover, and the main shaft and the end cover can be completely pressed against the bearing inner ring after being connected through bolts; the frock cover shell designs to the draw-in groove structure, through step location bearing outer lane and to it spacing, terminal surface and side all set up the screw hole about the frock cover shell, up end, side screw hole are used for lifting by crane the upset, downside screw hole is connected with the cover cooperation, the cover is boss structure, it is spacing to bear the outer lane opposite side, the cover is opened with the cooperation of frock cover shell has countersunk screw hole, terminal surface and cover up end leave certain clearance under the frock cover shell, guarantee that frock cover shell and cover can compress tightly the bearing outer lane after through bolted connection.

2. The novel paired angular contact ball bearing axial play measuring device according to claim 1, wherein: the main shaft, the inner spacer ring and the outer spacer ring with equal thickness and the tooling sleeve shell are all made of 45 steel, and the shaft end cover and the sleeve cover are made of 35 steel.