KR20220102926A - Apparatus for measuring axial play of bearing - Google Patents

Abstract

Proposed in the present invention is a bearing play measurement apparatus on which a measurement target is installed. The bearing play measurement apparatus comprises: a measurement assembly which moves in a vertical direction by rotation of a nut and transfers external force applied in the vertical direction to the measurement target by an elastic unit; and a support assembly which fixes and supports the measurement assembly, wherein a bearing play is measured by using fastening force of the nut of the measurement assembly and reaction force of the elastic unit.

Description

Apparatus for measuring axial play of bearing

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

The content described in this section merely provides background information for the present embodiment and does not constitute the prior art.

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

The hinge shaft, which is essential for driving devices, must withstand sideload and drag, and transmit power under external force applied. In this case, 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.

The conventional bearing clearance measuring device applies a load such as weight in both directions of the hinge axis and measures the amount of clearance measured accordingly. There is a problem that a distorted load may be applied during the application process. In addition, in the conventional bearing clearance measurement apparatus, it is difficult to accurately measure the clearance using weight and the method of applying the bearing spacer based thereon, and there is a problem in that it is difficult to apply the spacer by measuring the amount of clearance in microns.

The present invention has been devised 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 by using the screw fastening force and the reaction force of the spring to reduce backlash, increase lifespan, prevent wear, etc. It is to implement a bearing play measuring device considering the

Other objects not specified in 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, in the present invention, in a bearing clearance measurement device in which a measurement object is installed, it 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 measuring assembly; and a support assembly for fixing and supporting the measurement assembly, and provides a bearing clearance measuring device, characterized in that the clearance of the measurement object is measured using a fastening force of the nut of the measurement assembly and a reaction force of the elastic part .

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

Preferably, the measuring pin assembly further comprises 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, the upper end The measurement object is installed between the measurement pin and the lower measurement pin.

Preferably, the upper measuring pin and the lower measuring pin are assembled and fixed to each of the upper moving plate and the lower moving plate by forming a thread shape, and when the measuring object is fixed in the axial direction, 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 lengths 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 comprises: a screw housing into which the screw is inserted in the longitudinal direction; and a fixing assembly provided to fix the measurement assembly at a lower end and a side surface, wherein the fixing assembly includes: a lower support for supporting the measurement assembly to maintain a horizontal state; a movement guide unit providing a movement guide of the upper measuring pin connected to the upper end of the screw by the upper moving plate; and a body support part fixed to one surface of the lower support part to fix the screw housing and the movement guide part.

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 includes the nut in the first direction. When rotating, as the upper moving plate and the lower moving plate move to the upper end, 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, the compression of the elastic part is released and a downward external force is generated.

Preferably, it further comprises 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, wherein the dial gauge is compressed by the external force from the upper side, and the dial gauge is provided on the lower side. It is characterized in that it is implemented so that the measured value according to the application is confirmed.

Preferably, said measurement is via a sum of a first measurement of said dial gauge when said nut is rotated in said first direction and a second measurement of said dial gauge when said nut is rotated in said second direction. It is characterized in that the amount of play in the axial direction of the object is checked.

Preferably, the fixing assembly, a lower measuring pin connected to the lower end of the screw by a 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 object fixing part is characterized in that it is provided at the upper end of the lower support part.

Preferably, it further comprises a dial gauge for visually confirming the measured value according to the application of the load, the dial gauge is characterized in that it is connected to the center of the upper moving plate of the measuring pin assembly.

Preferably, the external force is simulated by changing the tightening torque of the nut, and various loads can be 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 that can be adjusted more precisely than the conventional weight-applying method for measuring clearance.

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

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

1 is a view showing an apparatus for measuring bearing play according to an embodiment of the present invention.
2 and 3 are views showing the coupling of the bearing clearance measuring apparatus and the 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 apparatus according to an embodiment of the present invention.
5 and 6 are views illustrating an assembly including a measurement object of the bearing clearance measuring apparatus 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 a method of achieving them will become apparent 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 published below, but may be implemented in various different forms, and only these embodiments allow the publication of the present invention to be complete, and common knowledge in the technical field to which the present invention pertains. It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

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

The terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that it does not preclude the possibility of the presence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Terms including an ordinal number such as second, first, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

The present invention relates to a bearing play measuring device.

The hinge shaft fixing the control blade of the driving device is composed of a bearing and a shaft assembly supporting both ends. At this time, the purpose of reducing backlash, increasing lifespan, and preventing wear can be achieved by minimizing the amount of play in the axial direction of the bearing. The conventional gap measuring apparatus has a structure in which there is no movement by applying an external force, such as a weight, to measure the upper and lower gaps of the object to be measured, and inserting a spacer equal to the measured value. At this time, the amount of gap measured varies according to the applied weight, and the amount of gap also changes depending on external factors such as assembly state, friction, and test method.

The bearing clearance measuring apparatus 10 of the present invention minimizes an error occurring in the process of measuring the bearing clearance, and can simulate various external forces by changing the tightening torque of the nut for applying a load. In addition, the bearing clearance measuring device 10 can be simulated from a light load to a high load by changing the size of the hexagon nut and the spring.

According to an embodiment of the present invention, the bearing clearance measuring apparatus 10 may be used in the civil field, the defense field, and the like. Here, the civilian field may refer to fields such as a power transmission device transmitting 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 defense field can represent the field of rotation shafts that require a long lifespan of the wing shaft of the guided missile drive device, antenna, radar, and the like.

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

The bearing clearance measuring apparatus 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 adjusted more precisely than the conventional weight application type clearance measurement device.

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

The support assembly 100 may secure 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 screw 230 in the longitudinal direction.

The fixing assembly 120 may be provided to fix the measurement assembly 200 at the lower end and the side.

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

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

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

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

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

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

The measurement assembly 200 may move up and down by rotation of the nut 240 , and may transmit an external force acting up and down by the elastic part 220 to the measurement object 20 .

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.

The nut 240 may generate an external force in a direction opposite to gravity as it rotates in the first direction along the thread of the screw 230 .

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

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

The measuring pin assembly 210 is a lower 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. It may include a pin 214b. Here, the measurement object may be installed between the upper measuring pin 214a and the lower measuring pin 214b.

The upper measuring pin 214a and the lower measuring pin 214b may be assembled and fixed to each of the upper moving plate 212a and the lower moving plate 212b to form a screw thread shape. The upper measuring pin 214a and the lower measuring pin 214b are on each of 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. By adjusting the assembled length, it may be assembled and fixed to each of the upper moving plate 212a and the lower moving plate 212b.

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

In the measurement pin assembly 210, 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 to the upper end, and an upward external force is applied. When this occurs, and 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

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

The bearing clearance measuring apparatus 10 may further include a dial gauge 300 for visually checking a measured value according to the application of a load.

The dial gauge 300 is connected to the center of the upper moving plate 212a to visually check the measurement value according to the load application, and the measurement value according to the load application is confirmed by the measurement value provided on the lower side being compressed by the upward external force. It can be implemented as much as possible. Here, the measured value may be implemented as a length, and may vary depending on the tightening torque of the nut.

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

2 and 3 are views showing the coupling of the bearing clearance measuring apparatus and the measurement object according to an embodiment of the present invention.

2 is a view illustrating a coupling between a bearing play measuring apparatus and a measurement target 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 portion 122 , a body support portion 124 , a movement guide portion 126 , and a dial gauge fixing portion 128 . The support assembly 100 may omit some of the various components exemplarily illustrated 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 fixedly attached to the side surface of the body support 124 , and the screw 230 may be assembled therein. At this time, the screw 230 may move along the inside of the screw housing 110 .

Although the screw housing 110 is illustrated as having a screw 230 assembled on the inside and a hexahedral shape on the outside, it is not necessarily limited thereto, and the screw 230 is assembled on the inside and the shape of the outside is not limited. does not

The screw housing 110 has 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 measuring device 10 is provided on a plane to keep it horizontal, and is provided at the bottom of the bearing clearance measuring device 10 to measure the bearing clearance (10) It supports the components of and is provided perpendicular to the lower end to fix some components of the bearing clearance measuring device 10 .

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

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

The body support 124 may be fixed vertically from the upper end of the lower support 122 . For example, the body support 124 may be fixed to be perpendicular to the 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 surface.

2, the body support portion 124 may be fixed in the order of the dial gauge fixing portion 128, the movement guide portion 126, and the screw housing 110 from the top, the dial gauge fixing portion 128, Each of the movement guide part 126 and the screw housing 110 may be fixed in a state spaced apart from each other by a predetermined distance.

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

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

The movement guide unit 126 may provide a guide so that the upper moving 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 the range.

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

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

The dial gauge 300 is a measuring instrument for visually checking a measured value according to the application of a load. Specifically, the dial gauge 300 may compare the length by reading the dimension indicated on the scale plate by applying a measuring ruler to the part to be measured and magnifying the fine movement of the spindle with a gear device.

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

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

When the object fixing unit 130 places the measurement object 20 between the upper measurement pin 214a and the lower measurement pin 214b, the measurement object 20 may be implemented such that the measurement object 20 is provided at the upper end. It is not limited.

The object fixing part 130 may be provided on the 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 limited thereto.

3 is a view showing a cross-section when the bearing clearance measuring apparatus and the measurement object are combined according to an embodiment of the present invention.

Referring to FIG. 3 , the measurement assembly 200 includes a measurement 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 by a screw 230 and an upper moving plate 212a and a lower moving plate 212b, respectively.

The measurement pin assembly 210 transmits an external force acting up and down to the measurement object 20 , and in this case, the entire measurement pin assembly 210 may move up and down.

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

The measuring pin assembly 210 is the upper measuring pin 214a connected by the upper end of the screw 230 and the upper moving plate 212a, and the lower measuring pin connected by the lower end and the lower moving plate 212b of the screw 230. It may include a pin 214b.

According to an embodiment of the present invention, the bearing clearance measuring apparatus 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 upper center, 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, and thereby the dial gauge ( 300), the measurement can be measured by reading the rotational displacement of the pointer by mechanically expanding the linear and circular motion.

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 measuring pin 214b at the opposite end of the upper end.

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

Referring to FIG. 3 , the object fixing unit 130 may be implemented such that the lower moving plate 212b is fixed therein, and the lower measuring pin 124b connected to the lower moving plate 212b is located at the center. can Specifically, the object fixing unit 130 may have an empty hole provided with a lower measuring pin 124b in the cylindrical center, 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 measuring object 20 .

According to an embodiment of the present invention, the upper measuring pin 124a and the lower measuring pin 124b form a screw thread shape to adjust the length when the measuring 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 each of the upper moving plate 212a and the lower moving plate 212b along the thread, and when assembling the measurement object 20 of 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 to be the same as each other. In this case, the fixing lengths of the upper measuring pin 124a and the lower measuring pin 124b may be set differently.

The elastic part 220 may generate an external force in the direction of gravity when the nut 240 is rotated 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, in the bearing play measuring apparatus 10, when the upper moving plate 212a moves upward by the rotation of the nut 240, 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, the bearing clearance measurement device 10 has the screw housing 110 and the lower end as the upper moving plate 212a moves downward by the rotation of the nut 240 , as the lower moving plate 212b moves downward. 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 an embodiment of the present invention, the screw 230 may be implemented to include a 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 that is a range that is moved by the nut 240 . Here, the size of the movement guide part 126 may indicate a vertical length indicating 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 may 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 an embodiment of the present invention, the bearing play measuring apparatus 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 rotational direction as the nut 240 is rotated, and may be calculated by the pressing force and the distance to the point where the force is applied to the nut 240 . . Here, the fastening force (axial force) may be calculated as a value representing 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 the upper end of the screw housing 110 , and the screw 230 is passed through and rotates along the screw thread of the screw 230 to move up and down.

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

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

According to an embodiment of the present invention, the first direction may be implemented as a counterclockwise direction and the second direction may be implemented as a clockwise direction. may be implemented as

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

Referring to (a) of FIG. 4 , the bearing play 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, the measurer provided on the lower side of the dial gauge 300 is compressed by an external force, and thus the measured value according to the load application can be checked, and the degree of play in the axial direction of the measurement object 20 can be measured.

The bearing clearance device 10 may generate an upward external force by rotating the nut 240 in the first direction. can rotate

According to one embodiment of the present invention, the bearing clearance device 10 is rotated by the nut 240 is screwed with the screw 230, and 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 play 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 may be reduced.

As the nut 240 is rotated 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 is a first measurement 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. Each of the second measured values measured by the gauge 300 may be calculated. Here, the amount of play in the axial direction of the measurement object 20 may be confirmed through the sum of the first measured value and the second measured value.

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

5 is a view illustrating 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 measuring 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 the play caused by machining tolerances can be measured. At this time, by being able to develop an appropriate countermeasure and supplementary measures through the measured clearance, it is possible to achieve the objectives of reducing backlash, increasing lifespan, and preventing wear.

The measurement object 20 included in the reducer assembly 30 attached to an unmanned aerial vehicle or a manned aircraft may be assembled with the bearing clearance measurement device 10 to measure 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 apparatus 10 measures the clearance generated by wear and processing tolerances due to long-term use between the inner and outer rings of the measurement object 20 to develop appropriate countermeasures and supplements.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes and substitutions are possible within the scope that does not depart from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are intended to explain, not to limit the technical spirit of the present invention, and the scope of the technical spirit of the present invention is not limited by these embodiments and the accompanying drawings . The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto 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 play measurement device in which the measurement object is installed,
a measuring assembly which 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
a support assembly for securing and supporting the measurement assembly;
The bearing play measuring device is a bearing play measuring device, characterized in that for measuring the play of the object to be measured using a fastening force of the nut of the measuring assembly and a reaction force of the elastic part. According to claim 1,
The measuring assembly comprises:
screw forming a thread;
a nut for generating an external force in a direction opposite to gravity as it rotates in a first direction along a thread of the screw;
an elastic part for generating an external force in a direction of gravity when the nut is rotated in a second direction; and
A bearing comprising an upper moving plate and a lower moving plate respectively connected to both ends of the screw, and a measuring pin assembly for transmitting an external force to the measurement object as the upper moving plate and the lower moving plate move up and down play measuring device. 3. The method of claim 2,
The measuring pin assembly,
Further comprising 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,
Bearing clearance measuring device, characterized in that the measurement target is installed between the upper measuring pin and the lower measuring pin. 4. The method of claim 3,
The upper measuring pin and the lower measuring pin,
It is assembled and fixed to each of the upper moving plate and the lower moving plate by forming a screw thread shape,
When the measurement object is fixed in the axial direction, the length assembled to each of the upper moving plate and the lower moving plate is adjusted according to the size of the measurement object to be assembled and fixed to each of the upper moving plate and the lower moving plate A bearing play measuring device characterized by. 4. The method of claim 3,
The measuring assembly comprises:
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. 3. The method of claim 2,
The support assembly,
a screw housing into which the screw is inserted in the longitudinal direction; and
a fixing assembly provided to secure the measurement assembly at the lower end and the side;
The fixing assembly comprises:
a lower support for supporting the measurement assembly to maintain a horizontal state;
a movement guide unit providing a movement guide of the upper measuring pin connected to the upper end of the screw by the upper moving plate; and
and a body support part fixed to one surface of the lower support part and fixing the screw housing and the movement guide part. 7. The method of 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 toward the upper end, 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 toward the lower end, the compression of the elastic part is released and a downward external force is generated. 8. The method of 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 load application,
The dial gauge is a bearing play measuring device, characterized in that the measurement provided on the lower side is compressed by the upward external force to check the measured value according to the load. 9. The method of 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 play measuring device, characterized in that it checks the amount of play. 7. The method of claim 6,
The fixing assembly comprises:
A lower measuring pin connected to the lower end of the screw by a lower moving plate and a part of the lower moving plate are provided inside, and further comprising an object fixing unit for supporting the measurement object,
The bearing clearance measuring device, characterized in that the object fixing part is provided at the upper end of the lower support part. 3. The method of claim 2,
Further comprising a dial gauge that visually confirms the measured value according to the load application,
The dial gauge is a bearing play measuring device, characterized in that connected to the center of the upper moving plate of the measuring pin assembly. 3. The method of claim 2,
The bearing play measuring device,
By changing the tightening torque of the nut, an external force is simulated, and by changing the size of the nut and the elastic part, it is possible to simulate various loads.

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