KR102531397B1 - Apparatus for measuring axial play of bearing - Google Patents

Abstract

The present invention is a bearing clearance measuring device in which a measurement object is installed, a measurement assembly that moves up and down by rotation of a nut and transmits an external force acting up and down by an elastic part to the measurement object and fixes the measurement assembly, A bearing clearance measurement device comprising a support assembly for supporting and measuring the clearance of an object to be measured using a fastening force of a nut and a reaction force of an elastic part of the measurement assembly is proposed.

Description

Bearing play measuring device {Apparatus for measuring axial play of bearing}

The present invention relates to a bearing clearance measuring device, and more particularly, to a bearing clearance measuring device using a screw fastening force and a reaction force of a spring.

The contents described in this part merely provide background information on the present embodiment and do not constitute prior art.

In general, a bearing refers to a mechanical element that fixes a shaft of a rotating machine at a certain position and serves to rotate the shaft while supporting the weight of the shaft and the load applied to the shaft.

Hinge shafts, which are essential for driving devices, must withstand sideload and drag, and transmit power when external force is applied. At this time, in order to increase control accuracy, a clearance close to zero may be required between the hinge shaft and the bearing supporting the hinge shaft.

Conventional bearing clearance measurement devices apply loads such as weights in both directions of the hinge axis to measure the amount of gaps measured accordingly. In the case of measuring such a load application method, it is difficult to calculate an appropriate weight, and in the case of high weight, the load There is a problem that a distorted load may be applied during the application process. In addition, in the conventional bearing clearance measurement device, it is difficult to accurately measure the clearance measurement using weight and the bearing spacer application method based thereon, and there is a problem in that it is difficult to apply the spacer by measuring the clearance amount in micron units.

The present invention has been made to solve the above problems, and an object of the present invention is to minimize the amount of play in the axial direction of the bearing using the screw fastening force and the reaction force of the spring, thereby reducing backlash, increasing life span, and reducing wear. It is to implement a bearing clearance measurement device considering

Other non-specified objects of the present invention may be additionally considered within the scope that can be easily inferred from the following detailed description and effects thereof.

In order to achieve the above object, the present invention is a bearing clearance measuring device in which a measurement object is installed, moves up and down by rotation of a nut, and transmits an external force acting up and down by an elastic part to the measurement object. a measuring assembly; and a support assembly for fixing and supporting the measurement assembly, wherein the measurement assembly measures the clearance of the object to be measured using a fastening force of the nut and a reaction force of the elastic part. .

Preferably, the measurement assembly includes a screw forming a screw thread; a nut generating an external force in a direction opposite to gravity as it rotates in a first direction along the thread of the screw; an elastic unit generating an external force in a direction of gravity when the nut is rotated in a second direction; and a measuring pin assembly comprising an upper moving plate and a lower moving plate respectively connected to both ends of the screw, and transmitting an external force to the measuring object as the upper moving plate and the lower moving plate move up and down. .

Preferably, the measuring pin assembly further includes an upper measuring pin connected to the upper end of the screw by the upper moving plate and a lower measuring pin connected to the lower end of the screw by the lower moving plate, It is characterized in that the measurement object is installed between the measuring pin and the lower measuring pin.

Preferably, the upper measuring pin and the lower measuring pin form a screw thread shape and are assembled and fixed to the upper moving plate and the lower moving plate, respectively, and when the measuring object is fixed in the axial direction, the measuring object It is characterized in that it is assembled and fixed to each of the upper moving plate and the lower moving plate by adjusting the length assembled to each of the upper moving plate and the lower moving plate according to the size.

Preferably, the measurement assembly is characterized in that a nut is provided at an upper end of the screw fixed to the support assembly, and the elastic part is provided at a lower end of the screw.

Preferably, the support assembly includes a screw housing into which the screw is inserted in the longitudinal direction; and a fixing assembly provided to fix the measuring assembly at a lower end and a side surface, the fixing assembly comprising: a lower support part supporting the measuring assembly to maintain a horizontal state; a movement guide unit providing a movement guide for an upper measuring pin connected to an upper end of the screw by the upper moving plate; and a body support that is fixed to one surface of the lower support and fixes the screw housing and the movement guide.

Preferably, the nut is provided between the screw housing and the upper moving plate, the elastic part is provided between the screw housing and the lower moving plate, and the measuring pin assembly is configured such that the nut moves in the first direction. When rotating, as the upper and lower moving plates move upward, the elastic part is compressed and an upward external force is generated, and when the nut rotates in the second direction, the upper moving plate and the lower moving plate As it moves to the lower end, compression of the elastic part is released and downward external force is generated.

Preferably, a dial gauge connected to the center of the upper moving plate to visually check a measured value according to the application of a load is further included, and the dial gauge has a measurer provided on a lower side of the dial that is compressed by the upper external force to load the load. It is characterized in that it is implemented so that the measured value according to the authorization is confirmed.

Preferably, the measurement is obtained by summing a first measurement value of the dial gauge when the nut rotates in the first direction and a second measurement value of the dial gauge when the nut rotates in the second direction. It is characterized by checking the amount of play in the axial direction of the object.

Preferably, the fixing assembly further includes a lower measuring pin connected to the lower end of the screw by a lower moving plate and an object fixing part having a part of the lower moving plate provided inside and supporting the measuring object, , The object fixing portion is characterized in that provided at the top of the lower support portion.

Preferably, the method further includes a dial gauge for visually confirming a measurement value according to load application, and the dial gauge is connected to the center of the upper moving plate of the measuring pin assembly.

Preferably, an external force is simulated by changing the fastening torque of the nut, and various loads are simulated by changing the size of the nut and the elastic part.

According to an embodiment of the present invention, the present invention has an effect of enabling more precise adjustment than the existing weight-applying type distance measuring device.

In addition, the present invention has the effect of simulating various loads according to the tightening torque of the nut.

In addition, according to one embodiment of the present invention, the effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned above will be clearly understood by those skilled in the art from the description below.

1 is a view showing an apparatus for measuring bearing play according to an embodiment of the present invention.
2 and 3 are diagrams illustrating a coupling between a bearing clearance measuring device and a measurement object according to an embodiment of the present invention.
4 is a view showing the generation of external force according to the rotation of the nut of the bearing clearance measuring device according to an embodiment of the present invention.
5 and 6 are views showing an assembly including a measurement object of a bearing clearance measuring device according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Advantages and features of the present invention, and methods for achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, only the present embodiments make the disclosure of the present invention complete, and the common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

Unless otherwise defined, all terms (including technical and scientific terms) used in this specification may be used in a meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in commonly used dictionaries are not interpreted ideally or excessively unless explicitly specifically defined.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention, and singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Terms including ordinal numbers such as second and first may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a second element may be termed a first element, and similarly, a first element may be termed a second element, without departing from the scope of the present invention. The terms and/or include any combination of a plurality of related recited items or any of a plurality of related recited items.

The present invention relates to a bearing clearance measuring device.

The hinge axis that fixes the control blades of the driving device is composed of a bearing and a shaft assembly of a double-end support type. At this time, the amount of play in the axial direction of the bearing must be minimized to achieve the purpose of reducing backlash, increasing service life, and preventing wear. A conventional gap measurement device measures the upper and lower gaps of a measurement object by applying an external force such as a weight, and has a motionless structure by inserting spacers equal to the measured value. At this time, the amount of clearance measured varies according to the weight value applied, and the amount of clearance also changes according to external factors such as assembly state, friction, and test method.

The bearing clearance measuring device 10 of the present invention minimizes errors occurring in the process of measuring bearing clearance and can simulate various external forces by changing the fastening torque of a nut for applying a load. In addition, the bearing clearance measurement device 10 can simulate a light load to a high load by changing the size of a hexagon nut and a spring.

According to one embodiment of the present invention, the bearing clearance measuring device 10 can be used in the civil and defense fields. Here, the civilian field may refer to fields such as a power transmission device that transmits rotational force such as a steering device of a vehicle and a crankshaft, and a shaft assembly having rotational force such as a conveyor belt. The field of defense industry may represent the field of rotational axes that require a long lifespan, such as the wing axis of a missile drive system and antennas, radars, etc.

1 is a view showing an apparatus for measuring bearing play according to an embodiment of the present invention.

As shown in FIG. 1 , the bearing clearance measuring device 10 includes a support assembly 100 and a measuring assembly 200, and further includes a dial gauge 300. The bearing clearance measurement device 10 may omit some of the various components exemplarily shown in FIG. 1 or may additionally include other components.

The bearing clearance measurement device 10 may be provided with the measurement object 20 installed, and may be implemented according to the size of the measurement object.

The bearing clearance measurement device 10 can be more precisely adjusted than the existing weight application type clearance measurement device.

The measurement object 20 may be implemented as a structure having a general both-end support bearing structure, but is not necessarily limited thereto.

The support assembly 100 may fix and support the measurement assembly 200 .

The support assembly 100 may include a screw housing 110 and a fixing assembly 120 .

The screw housing 110 may be inserted into the inside of the screw 230 in the longitudinal direction.

A fixing assembly 120 may be provided to fix the measuring assembly 200 at the bottom and sides.

The fixing assembly 120 may include a lower support part 122 , a body support part 124 , a movement guide part 126 and a dial gauge fixing part 128 .

The lower support 122 may support the measurement assembly 200 to maintain a horizontal state.

The movement guide unit 126 may provide a movement guide for the upper measuring pin 214a connected to the upper end of the screw 230 by the upper moving plate 212a.

The body support 124 may be fixed to one surface of the lower support 122 to fix the screw housing 110 and the movement guide 126 .

The fixing assembly 120 has a lower measuring pin 214b connected to the lower end of the screw 230 by a lower moving plate 212b and a part of the lower moving plate 212b is provided inside, and the measurement object 20 is provided. It may further include an object fixing unit 130 to support.

The object fixing part 130 may be provided on top of the lower support part 122 .

The measurement assembly 200 moves up and down by the rotation of the nut 240, and can transfer external force acting up and down by the elastic part 220 to the object 20 to be measured.

The measuring assembly 200 includes a measuring pin assembly 210 , an elastic part 220 , a screw 230 and a nut 240 .

The screw 230 may form a thread.

As the nut 240 rotates in the first direction along the thread of the screw 230, an external force may be generated in a direction opposite to gravity.

The elastic part 220 may generate an external force in the direction of gravity when the nut 240 rotates in the second direction.

The measuring pin assembly 210 includes an upper moving plate 212a and a lower moving plate 212b connected to both ends of the screw, and the upper moving plate 212a and the lower moving plate 212b move up and down. Accordingly, an external force may be transmitted to the measurement object 20 .

The measuring pin assembly 210 measures the upper measuring pin 214a connected to the upper end of the screw 230 by the upper moving plate 212a and the lower end connected to the lower end of the screw 230 by the lower moving plate 212b. A pin 214b may be included. Here, the measurement object may be installed between the upper measurement pin 214a and the lower measurement pin 214b.

The upper measuring pin 214a and the lower measuring pin 214b may form a thread shape and be assembled and fixed to the upper moving plate 212a and the lower moving plate 212b, respectively. The upper measuring pin 214a and the lower measuring pin 214b are respectively attached to the upper moving plate 212a and the lower moving plate 212b according to the size of the measuring object 20 when the measuring object 20 is fixed in the axial direction. It may be assembled and fixed to each of the upper moving plate 212a and the lower moving plate 212b by adjusting the assembled length.

In the bearing clearance measuring device 10, a nut 240 is provided between the screw housing 110 and the upper moving plate 212a, and an elastic part 220 is provided between the screw housing 110 and the lower moving plate 212b. may be provided.

When the nut 240 rotates in the first direction, the elastic part 220 is compressed as the upper moving plate 212a and the lower moving plate 212b move upward, and the upward external force is applied to the measuring pin assembly 210. occurs, and when the nut 240 rotates in the second direction, as the upper moving plate 212a and the lower moving plate 212b move to the lower end, the compression of the elastic part 220 is released and a downward external force is generated. can

The measurement assembly 200 may include a nut 240 provided at an upper end of a screw 230 fixed to the support assembly 100 and an elastic part 220 provided at a lower end of the screw 230 .

The bearing clearance measurement device 10 may further include a dial gauge 300 that visually checks a measurement value according to load application.

The dial gauge 300 is connected to the center of the upper moving plate 212a to check the measured value according to the application of the load with the naked eye, and the measurer provided on the lower side is compressed by the upper external force to confirm the measured value according to the application of the load. It can be implemented as possible. Here, the measured value may be implemented as a length and may vary according to the tightening torque of the nut.

The bearing clearance measuring device 10 measures a first measured value of the dial gauge 300 when the nut 240 rotates in a first direction and a dial gauge 300 when the nut 240 rotates in a second direction. The axial clearance of the measurement object 20 may be confirmed through the sum of the second measurement values of .

2 and 3 are diagrams illustrating a coupling between a bearing clearance measuring device and a measurement object according to an embodiment of the present invention.

2 is a view showing a coupling between a bearing clearance measuring device and a measurement object according to an embodiment of the present invention.

Referring to FIG. 2 , the support assembly 100 includes a screw housing 110 and a fixing assembly 120 . Here, the fixing assembly 120 includes a lower support part 122, a body support part 124, a movement guide part 126, and a dial gauge fixing part 128. The support assembly 100 may omit some of the various components exemplarily shown in FIG. 2 or may additionally include other components.

The support assembly 100 may be implemented as a structure for fixing the measurement assembly 200 and the dial gauge 300 .

Referring to FIG. 2 , the screw housing 110 may be attached to and fixed to a side surface of the body support 124, and a screw 230 may be assembled therein. At this time, the screw 230 may move along the inside of the screw housing 110 .

The screw housing 110 is illustrated as being assembled with the screw 230 on the inside and formed in a hexahedron shape on the outside, but is not necessarily limited thereto, and is implemented such that the screw 230 is assembled on the inside and the shape of the outside is not limited. don't

The screw housing 110 forms a hollow inside so that the screw 230 can be inserted in the longitudinal direction.

The fixing assembly 120 may be implemented in a flat shape so that the bearing clearance measurement device 10 is provided on a flat surface to maintain a level, and is provided at the lower end of the bearing clearance measurement device 10 to maintain the bearing clearance measurement device 10 It supports the components of and is provided perpendicularly to the lower end to fix some components of the bearing clearance measuring device 10.

The lower support 122 is provided at the lower end of the bearing clearance measuring device 10, supports components of the bearing clearance measuring device 10, and may have a flat shape to be provided on a plane.

Referring to FIG. 2 , the lower support 122 may be formed in a hexahedral shape, but is not necessarily limited thereto.

The body support 124 may be fixed vertically at an upper end of the lower support 122 . For example, the body support 124 may be fixed vertically at the distal end of the upper end of the lower support 122 .

The body support part 124 may fix the screw housing 110, the movement guide part 126, and the dial gauge fixing part 128 to the side.

Referring to FIG. 2, the body support 124 may be fixed in the order of the dial gauge fixing part 128, the movement guide part 126, and the screw housing 110 from the top, and the dial gauge fixing part 128, Each of the movement guide unit 126 and the screw housing 110 may be fixed at a predetermined distance from each other.

The body support 124 may be implemented in a cube shape, but is not necessarily limited thereto.

According to one embodiment of the present invention, the bearing clearance measuring device 10 may be implemented with a lower support 122 so as to maintain a horizontal state when placed on the floor, and one side is vertically connected to the lower support 122. can

The movement guide unit 126 may provide a guide so that the upper movement plate 212a moves up and down. Specifically, the upper moving plate 212a may be implemented to move up and down along the movement guide part 126 by the nut 240, and may not deviate from its range.

The upper moving plate 212a assembled to the movement guide unit 126 may be provided at the center of the movement guide unit 126 when the position of the upper measuring pin 214a is in a neutral state, and the movement guide unit 126 You can move up and down along the . At this time, the range in which the upper moving plate 212a can move may be set according to the size of the moving guide part 126 .

The dial gauge fixing part 128 may fix the dial gauge 300 and may be provided at an upper end of the movement guide part 126 .

The dial gauge 300 is a measuring device for visually checking a measurement value according to load application. Specifically, the dial gauge 300 can compare the length by reading the dimension indicated on the scale plate by enlarging the fine movement of the spindle with a gear device by placing a measurer on the part to be measured.

Referring to FIG. 2 , the dial gauge 300 may be fixed to the dial gauge fixing part 128 and connected to and fixed to the upper moving plate 212a at the center of the upper moving plate 212a. At this time, the dial gauge 300 can check the measured value according to the application of the load while the upper moving plate 212a moves up and down, and can measure the degree of play of the object 20 in the axial direction.

The fixing assembly 120 may further include an object fixing unit 130 .

The object fixing unit 130 may be implemented so that the measurement object 20 is provided at the top when the measurement object 20 is positioned between the upper measurement pin 214a and the lower measurement pin 214b. It is not limited.

The object fixing part 130 may be provided at an upper end of the lower support part 122 and may be provided at a position separated from the body support part 124 by a predetermined distance.

Referring to FIG. 2 , the object fixing unit 130 may be implemented in a cylindrical shape, but is not necessarily limited thereto.

3 is a view showing a cross section when a bearing clearance measuring device according to an embodiment of the present invention is coupled with a measurement object.

Referring to FIG. 3 , the measuring assembly 200 includes a measuring pin assembly 210 , an elastic part 220 , a screw 230 and a nut 240 . Here, the measuring pin assembly 210 includes an upper measuring pin 214a and a lower measuring pin 214b, and is connected to the screw 230 by an upper moving plate 212a and a lower moving plate 212b, respectively.

The measuring pin assembly 210 transmits an external force that acts up and down to the measurement object 20, and at this time, the entire measuring pin assembly 210 can move up and down.

As the measurement pin assembly 210 moves up and down, it may serve to apply a load to the inner ring of the measurement object 20 disposed between the upper measurement pin 214a and the lower measurement pin 214b.

The measuring pin assembly 210 includes an upper measuring pin 214a connected by the upper end of the screw 230 and the upper moving plate 212a and a lower measuring pin connected by the lower end of the screw 230 and the lower moving plate 212b. A pin 214b may be included.

According to one embodiment of the present invention, the bearing clearance measuring device 10 may fix the measurement object 20 between the upper measuring pin 214a and the lower measuring pin 214b.

The upper moving plate 212a may be connected to the dial gauge 300 at the center of the upper end, connected to the screw 230 at the lower end, and connected to the upper measuring pin 214a at the opposite end of the lower end.

In the bearing clearance measuring device 10, as the upper moving plate 212a moves up and down by the nut 240 assembled to the screw 230, the upper measuring pin 214a also moves together, whereby the dial gauge ( 300) can measure the rotational displacement of the handset by mechanically expanding the linear and circular motions of the lower end measuring device.

The lower moving plate 212b may be connected to the lower end of the screw 230 at the upper end and connected to the lower measurement pin 214b at the opposite end of the upper end.

In the bearing clearance measuring device 10, as the lower moving plate 212b moves up and down by the nut 240 assembled to the screw 230, the lower measuring pin 214b connected to the lower moving plate 212b is also together. can move

Referring to FIG. 3 , the object fixing unit 130 may be implemented so that the lower moving plate 212b is fixed to the inside, and the lower measuring pin 124b connected to the lower moving plate 212b is positioned at the center. can Specifically, the object fixing unit 130 may have an empty hole provided with a lower measuring pin 124b at the center of the cylinder, and a gap may be formed on a side surface connected to the lower moving plate 212b.

The upper measuring pin 124a and the lower measuring pin 124b may be implemented to be fixed in the axial direction of the measurement object 20 .

According to one embodiment of the present invention, the upper measuring pin (124a) and the lower measuring pin (124b) form a thread shape to adjust the length when the measurement object 20 is fixed in the axial direction. Specifically, the upper measuring pin 124a and the lower measuring pin 124b may be assembled and fixed to the upper moving plate 212a and the lower moving plate 212b, respectively, along the screw thread, and during assembly, the measurement object 20 It is fixed to each of the upper moving plate 212a and the lower moving plate 212b according to the size, and the fixed length may be set equal to each other. At this time, the fixed lengths of the upper measuring pin 124a and the lower measuring pin 124b may be set to be different from each other.

The elastic part 220 may generate an external force in the direction of gravity when the nut 240 rotates in the second direction. Here, the generated external force may be generated by the upper measuring pin 214a.

The elastic part 220 may be provided along the outer surface of the screw 230 between the screw housing 110 and the lower moving plate 122b.

According to an embodiment of the present invention, when the upper moving plate 212a moves upward by the rotation of the nut 240, the bearing clearance measuring device 10 moves upward as the lower moving plate 212b moves upward. The elastic part 220 may be compressed between the screw housing 110 and the lower moving plate 122b. In addition, when the upper moving plate 212a moves downward due to the rotation of the nut 240, the bearing clearance measuring device 10 moves downward, as the lower moving plate 212b moves downward, the screw housing 110 and the lower end The shape of the elastic part 220 compressed between the moving plates 122b may be restored to its original state.

The screw 230 may be implemented in a form penetrating the inside of the screw housing 110 and may include a screw thread shape.

According to one embodiment of the present invention, the screw 230 may be implemented to include a screw thread shape only as much as the range moved by the nut 240, but is not necessarily limited thereto. For example, the screw 230 may form a screw thread shape as much as the size of the movement guide part 126, which is a movement range by the nut 240. Here, the size of the movement guide unit 126 may indicate a vertical length representing a range in which the upper moving plate 122a moves vertically.

The nut 240 may generate an external force in a direction opposite to gravity as it rotates in the first direction, and generate an external force in the direction of gravity as it rotates in the second direction. Here, the generated external force may be generated by the lower measuring pin 214b.

According to one embodiment of the present invention, the bearing clearance measuring device 10 may simulate various loads according to the tightening torque of the nut 240 . Here, the tightening torque may represent the fastening force (axial force) generated by the direction of rotation as the nut 240 rotates, and may be calculated by the pressing force and the distance to the point where force is applied to the nut 240 . Here, the fastening force (axial force) can be calculated from the value of the torque coefficient and the name of the nut 240 in the tightening torque.

Referring to FIG. 3 , the nut 240 may be provided at an upper end of the screw housing 110 and may move up and down as the screw 230 penetrates and rotates along the thread of the screw 230 .

4 is a view showing the generation of external force according to the rotation of the nut of the bearing clearance measuring device according to an embodiment of the present invention.

Figure 4 (a) is a view of rotating the nut of the bearing clearance measuring device according to an embodiment of the present invention in a first direction, Figure 4 (b) is a bearing clearance measuring device according to an embodiment of the present invention It is a view of rotating the nut of in the second direction.

According to one embodiment of the present invention, the first direction may be implemented in a counterclockwise direction and the second direction may be implemented in a clockwise direction, but are not necessarily limited thereto, and the first direction is clockwise and the second direction is counterclockwise. may be implemented as

The bearing clearance measuring device 10 may be positioned so that the upper moving plate 212a is provided at the center of the moving guide part 126 in a neutral state, and the measurement is made between the upper measuring pin 214a and the lower measuring pin 214b. Objects can be positioned.

Referring to (a) of FIG. 4 , the bearing clearance device 10 rotates the nut 240 in the first direction so that the upper measuring pin 214a can move upward along the movement guide part 126. Accordingly, a measurer provided on the lower side of the dial gauge 300 may be compressed by an external force to check a measured value according to the application of a load, and measure the degree of axial play of the object 20 to be measured.

The bearing clearance device 10 may generate an upward external force by rotating the nut 240 in the first direction, and the nut 240 may be rotated by mounting a separate motor or operated by an operator. can rotate

According to one embodiment of the present invention, the bearing clearance device 10 rotates by screwing the nut 240 with the screw 230, and rotates the upper measuring pin 214a and the lower measuring pin by the rotation of the nut 240. The distance traveled by 214b can be measured.

Referring to (b) of FIG. 4 , the bearing clearance device 10 rotates the nut 240 in the second direction so that the upper measuring pin 214a can move downward along the movement guide part 126. Accordingly, the external force formed on the measurer provided on the lower side of the dial gauge 300 can be reduced.

As the nut 240 rotates in the second direction, an external force may be generated upward so that the elastic part 220 returns to its original shape in a compressed state.

Therefore, the bearing clearance measuring device 10 provides the first measured value measured by the dial gauge 300 when the nut 240 moves in the first direction and the dial when the nut 240 moves in the second direction. Second measurement values measured by the gauge 300 may be calculated respectively. Here, the amount of clearance in the axial direction of the object to be measured 20 may be confirmed through the sum of the first measurement value and the second measurement value.

5 and 6 are views showing an assembly including a measurement object of a bearing clearance measuring device according to an embodiment of the present invention.

5 is a view showing a reducer assembly attached to an aircraft according to an embodiment of the present invention, and FIG. 6 is a view showing a measurement object provided in the reducer assembly according to an embodiment of the present invention.

5 and 6, the bearing clearance measurement device 10 is worn between the inner ring and the outer ring of the measurement object 20 included in the reducer assembly 30 attached to an unmanned aerial vehicle, a manned aircraft, etc. due to long-term use. And it is possible to measure the play caused by the machining tolerance. At this time, it is possible to develop appropriate countermeasures and supplementary measures through the measured clearance, thereby achieving objectives such as reducing backlash, increasing life span, and preventing wear.

The measurement object 20 included in the reducer assembly 30 attached to an unmanned aerial vehicle, a manned aircraft, etc. may be assembled with the bearing clearance measuring device 10 to measure the clearance.

Referring to FIG. 6 , the measurement object 20 may be implemented as a shaft assembly, and is not limited to the shape shown in FIG. 6 .

Therefore, the bearing clearance measuring device 10 measures the clearance generated by wear and processing tolerances caused by long-term use between the inner and outer rings of the object 20 to be measured, so that appropriate countermeasures and supplementary measures can be developed.

The above description is merely an example of the technical idea of the present invention, and those skilled in the art can make various modifications, changes, and substitutions without departing from the essential characteristics of the present invention. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical idea of the present invention, but to explain, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings. . The protection scope of the present invention should be construed according to the following claims, and all technical ideas within the equivalent range should be construed as being included in the scope of the present invention.

10: bearing play measuring device
20: measurement object
100: support assembly
200: measuring assembly
300: dial gauge

Claims (12)

In the bearing clearance measuring device in which the measurement object is installed,
a measuring assembly that moves up and down by rotation of a nut and transmits an external force acting up and down by an elastic part to the object to be measured; and
A support assembly for fixing and supporting the measurement assembly;
The bearing clearance measurement device measures the clearance of the object to be measured using the fastening force of the nut of the measurement assembly and the reaction force of the elastic part,
The measuring assembly may include a screw forming a screw thread; a nut generating an external force in a direction opposite to gravity as it rotates in a first direction along the thread of the screw; an elastic unit generating an external force in a direction of gravity when the nut is rotated in a second direction; And a measuring pin assembly comprising an upper moving plate and a lower moving plate connected to both ends of the screw, respectively, and transmitting an external force to the measurement object as the upper moving plate and the lower moving plate move up and down, ,
The measuring pin assembly further includes an upper measuring pin connected to the upper end of the screw by the upper moving plate and a lower measuring pin connected to the lower end of the screw by the lower moving plate, wherein the upper measuring pin and the The measurement object is installed between the lower measurement pins,
The upper measuring pin and the lower measuring pin form a screw thread shape and are assembled and fixed to the upper moving plate and the lower moving plate, respectively, and when the object to be measured is fixed in the axial direction, the size of the measuring object A bearing clearance measuring device, characterized in that the bearing clearance measuring device is assembled and fixed to each of the upper moving plate and the lower moving plate by adjusting the lengths assembled to each of the upper moving plate and the lower moving plate. delete delete delete According to claim 1,
The measuring assembly,
A bearing clearance measuring device, characterized in that a nut is provided at an upper end of the screw fixed to the support assembly, and the elastic part is provided at a lower end of the screw. According to claim 1,
The support assembly,
a screw housing into which the screw is inserted in the longitudinal direction; and
a fixing assembly provided to fix the measuring assembly at the bottom and the side;
The fixing assembly,
a lower support for supporting the measuring assembly to maintain a horizontal state;
a movement guide unit providing a movement guide for an upper measuring pin connected to an upper end of the screw by the upper moving plate; and
A bearing clearance measuring device comprising a body support fixed to one surface of the lower support and fixing the screw housing and the movement guide. According to claim 6,
The nut is provided between the screw housing and the upper moving plate, and the elastic part is provided between the screw housing and the lower moving plate,
The measuring pin assembly,
When the nut rotates in the first direction, as the upper moving plate and the lower moving plate move upward, the elastic part is compressed and an upward external force is generated,
When the nut rotates in the second direction, as the upper moving plate and the lower moving plate move to the lower end, compression of the elastic part is released and a downward external force is generated. According to claim 7,
Further comprising a dial gauge connected to the center of the upper moving plate to visually check the measured value according to the application of the load,
The bearing clearance measuring device, characterized in that the dial gauge is implemented so that the measurer provided on the lower side is compressed by the upward external force to confirm the measured value according to the application of the load. According to claim 8,
The axial direction of the measurement object through the sum of the first measurement value of the dial gauge when the nut rotates in the first direction and the second measurement value of the dial gauge when the nut rotates in the second direction A bearing clearance measuring device characterized in that for checking the amount of clearance. According to claim 6,
The fixing assembly,
A lower measuring pin connected to the lower end of the screw by the lower moving plate and a part of the lower moving plate are provided inside, and further comprising an object fixing part for supporting the measurement object,
The bearing clearance measuring device, characterized in that the object fixing portion is provided at the upper end of the lower support portion. According to claim 1,
Further comprising a dial gauge for visually checking the measured value according to the load application,
The bearing clearance measuring device, characterized in that the dial gauge is connected to the center of the upper moving plate of the measuring pin assembly. According to claim 1,
The bearing play measuring device,
An external force is simulated by changing the fastening torque of the nut, and various loads are simulated by changing the size of the nut and the elastic part.

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