KR101090858B1 - Two-axis gimbal system having self-preload type bearing - Google Patents

Two-axis gimbal system having self-preload type bearing Download PDF

Info

Publication number
KR101090858B1
KR101090858B1 KR1020100125582A KR20100125582A KR101090858B1 KR 101090858 B1 KR101090858 B1 KR 101090858B1 KR 1020100125582 A KR1020100125582 A KR 1020100125582A KR 20100125582 A KR20100125582 A KR 20100125582A KR 101090858 B1 KR101090858 B1 KR 101090858B1
Authority
KR
South Korea
Prior art keywords
self
gimbal
shaft
bearing
cover
Prior art date
Application number
KR1020100125582A
Other languages
Korean (ko)
Inventor
류성훈
Original Assignee
엘아이지넥스원 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘아이지넥스원 주식회사 filed Critical 엘아이지넥스원 주식회사
Priority to KR1020100125582A priority Critical patent/KR101090858B1/en
Application granted granted Critical
Publication of KR101090858B1 publication Critical patent/KR101090858B1/en

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G1/00—Sighting devices
    • F41G1/06—Rearsights
    • F41G1/16—Adjusting mechanisms therefor; Mountings therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41G—WEAPON SIGHTS; AIMING
    • F41G11/00—Details of sighting or aiming apparatus; Accessories
    • F41G11/001—Means for mounting tubular or beam shaped sighting or aiming devices on firearms
    • F41G11/005—Mountings using a pivot point and an anchoring point
    • F41G11/008—Mountings using a pivot point and an anchoring point the device being pivotable about an axis coaxial with the axis of the barrel, e.g. for loading

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Support Of The Bearing (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

PURPOSE: A biaxial gimbal system having a self-preload bearing is provided to reduce the time for inspecting the preloading of a bearing because the preloading of the self-preload bearing is not released when the gimbal system is disassembled. CONSTITUTION: A biaxial gimbal system comprises outer and inner gimbals(100,200) and a shaft coupling part(300). The outer gimbal comprises a receiving space(110), shafts holes(120) bored on opposite sides, and first shafts(130) which are protruded from the outer face of the other opposite sides and coupled to a frame. The inner gimbal comprises a second shaft(210) having a hollow portion(211) and a lens hole(220) which is coupled to the shaft holes and accommodates a lens in the center thereof. The shaft coupling part comprises an annular housing(310) coupled to the shaft holes of the outer gimbal, a torque motor(320) which contacts the exterior surface of the second shaft, a cover(330) which is coupled to the front side of the housing and prevents the separation of the torque motor, and a self-preload bearing(350) which is coupled to the center of the cover with a fastening bolt(340) and contacts the inner surface of the hollow portion of the second shaft.

Description

TWO-AXIS GIMBAL SYSTEM HAVING SELF-PRELOAD TYPE BEARING with Self-Preload Bearing

The present invention relates to a gimbal system having a self-preload type bearing, and more particularly, to a self-preload type bearing to which preload is applied independently to a two-axis gimbal system to simplify the assembly process and to disassemble the gimbal system. The present invention relates to a gimbal system having a self-preloaded bearing which can reduce the time required for bearing preload inspection and reduce the cost of the gimbal system by preventing the preload of the self-preloaded bearing from being released.

In general, to detect and track a moving target, the lens is moved up, down, left, and right, and a center axis for moving up and down and a center axis for moving left and right are called two-axis gimbal systems.

1 is an exploded perspective view showing an exploded structure of a conventional two-axis gimbal system, Figure 2 is a perspective view showing the structure of a bearing fastened between the inner gimbal and the housing by cutting the inner gimbal of Figure 1, Figure 3 2 is a plan view showing the structure of the incision surface of FIG.

As shown in these figures, the conventional two-axis gimbal system has a receiving space 11 in the center region, the shaft hole 12 is formed through the opposite side of the mutually opposite side and the outer side of the other side opposite to each other The first shaft 13 is rotatably coupled to the frame (not shown) of the outer gimbal 10 protruding and the second shaft 21 is provided on the outer side of one side surface facing each other and the shaft hole 12 The inner gimbal (20) and the outer gimbal (10) which is rotatably coupled to the inner and provided with a lens hole (22) in which a separate lens is fastened in the center region and disposed in the accommodation space (11) of the outer gimbal (10) It consists of a shaft coupling portion 30 which is provided on the periphery of the second shaft 21 of the inner gimbal 20 is rotatably coupled to the shaft hole 12 of the.

The shaft coupling part 30 has a large diameter bearing 31 installed at the periphery of the second shaft 21 so that the inner gimbal 20 rotates with respect to the fixed outer gimbal 10, and the bearing 31 A housing 32 inserted into the shaft hole 12 so as not to be separated from the second shaft peripheral portion, a torque motor 33 inserted into a hollow formed in the housing 32 and the second shaft 21 inserted into an inner diameter thereof; The bearing 31, the housing 32, the torque motor 33 is composed of a locking bolt 34 is fastened to the second shaft 21 to be integrally coupled to the second shaft 21 and the shaft hole (12).

Here, the inner ring of the bearing 31 is installed to be in contact with the inner gimbal 20, the outer ring of the bearing 31 is installed to be in contact with the housing 32, the separate by the bearing (31) The inner gimbal 20 may freely rotate with respect to the outer gimbal 10 fixed to a frame (not shown).

The bearing 31 always has play in its axial and radial directions, and this play reduces positional accuracy and repeatability in the gimbal system. A method for solving this problem is to design a bearing 31 in a bearing design. Preload is applied to (31) to eliminate the play in each direction.

A common method of preloading to minimize play is in-position preloading. Pre-positioned preload is a method of minimizing radial and axial play by artificially generating relative positions in the inner and outer rings of a bearing.

In the general preloading method, as shown in FIG. 3, the mount is designed so that only the outer ring of the bearing 31 is mounted, and the inner ring is designed by a combination of shims, bolts, or screws, so that the structural design may be artificially generated. The play between the ball and the outer ring and the inner ring of the lower surface of the bearing 31 disappears, thereby enabling precise position control.

However, in such a conventional two-axis gimbal system, when repairing the gimbal system or dismantle the shaft structure for precise adjustment, the preload of the bearing 31 is released, it is necessary to check the bearing 31 preload whenever disassembly and assembly There was an uncomfortable problem.

In addition, the preload amount of the bearing 31 depends not only on the tolerance of the bearing 31 itself but also on the thickness of the shim, so that a thin, precisely processed flat shim is required to have a uniform flatness and thickness. There is a problem that additional costs are incurred.

The object of the present invention devised in view of the above point is to fasten the self-preload type bearing to which the preload is applied independently to the two-axis gimbal system to simplify the assembly process and preload the self-preload type bearing even when disassembling the gimbal system. The present invention provides a steaming system having a self-preloading bearing which can reduce the time required for bearing preload checking and reduce the cost of manufacturing a steaming system by preventing this from being released.

Gimbal system having a self-preloaded bearing for achieving the object of the present invention as described above, has a receiving space in the center area and the shaft hole is formed through the opposite side of the mutually opposite side of the other side facing each other An outer gimbal protruding from the first shaft to be rotatably coupled to the frame; A second shaft having a hollow formed on an outer side of one side surface facing each other is provided to protrude so as to be rotatably coupled to the shaft hole, and having a lens hole to which a separate lens is fastened to a central region, and disposed in the accommodation space of the outer gimbal; Internal gimbal; An annular housing coupled to the shaft hole of the outer gimbal, a torque motor housed in a central region of the housing and in contact with an outer surface of the second shaft hole, and coupled to the front surface of the housing so that the torque motor is external A shaft engaging portion formed of a cover for preventing separation and a self-preload type bearing fastened to a center of the cover by a fastening bolt and contacting the inner surface of the hollow of the second shaft; Characterized in that configured to include.

Here, the fastening bolt is fastened to the cover so that the inner ring is displaced with respect to the outer ring of the self-preloaded bearing by pressing the inner ring of the self-preloaded bearing.

The central region of the cover is characterized in that the self-preloaded bearing is inserted into the hollow so that the entire outer surface of the cover protrudes to a height in contact with the inner surface of the second shaft.

In addition, a portion of the lower side of the cover is formed in an incision, and one side of the outer surface of the torque motor that is exposed to the outside through the incision of the cover to selectively restrain the rotational movement of the torque motor. Characterized in that the stopper is provided in contact with the side.

As described above, the gimbal system having the self-preload type bearing according to the present invention has an effect of simplifying the assembly process by fastening the self-preload type bearing to which the preload is independently applied to the two-axis gimbal system.

In addition, even when the gimbal system is disassembled, the preload of the self-preload type bearing is not released, thereby reducing the time required for checking the bearing preload and reducing the cost of producing the gimbal system.

In addition, by using a bearing to which the self preload is applied, a structure for precisely processing the gimbal for the preloading of the bearing to be mounted only on the inner ring or the outer ring is unnecessary, thereby reducing the processing cost of the gimbal.

1 is an exploded perspective view showing an exploded structure of a conventional two-axis gimbal system,
FIG. 2 is a perspective view illustrating a structure of a bearing fastened between the inner gimbal and the housing by cutting the inner gimbal of FIG. 1;
3 is a plan view showing the structure of the incision surface of FIG.
Figure 4 is an exploded perspective view showing an exploded view of a gimbal system having a self-preloaded bearing according to an embodiment of the present invention,
FIG. 5 is a perspective view illustrating a structure in which a self-preload bearing is coupled to the cover of FIG. 4;
6 is a perspective view showing the structure of the shaft coupling portion by cutting the inner gimbal and outer gimbal of FIG.
7 is a plan view showing the structure of the incision surface of Figure 6,
8 is a plan view illustrating a structure to which preload is applied to a self-preload bearing.

Hereinafter, with reference to the accompanying drawings a gimbal system having a self-loading bearing according to an embodiment of the present invention in more detail as follows.

Figure 4 is an exploded perspective view showing an exploded view of the gimbal system having a self-loading bearing according to an embodiment of the present invention, Figure 5 is a perspective view showing a structure in which the self-preloading bearing is coupled to the cover of FIG. 6 is a perspective view illustrating the structure of the shaft coupling part by cutting the inner gimbal and the outer gimbal of FIG. 4, FIG. 7 is a plan view showing the structure of the cutaway surface of FIG. 6, and FIG. It is a top view which shows the applied structure.

As shown in these drawings, the gimbal system having a self-preloaded bearing according to an embodiment of the present invention, the receiving hole 110 in the central region and the shaft hole 120 is penetrated to the opposite side surface The outer gimbal 100 is formed and protrudes the first shaft 130 is rotatably coupled to a separate frame on the outer side of the other side facing each other, and the hollow 211 is formed on the outer side of the opposite side The two shafts 210 are protruded to be rotatably coupled to the shaft hole 120 and have a lens hole 220 to which a separate lens is fastened to a central region, and is disposed in the accommodation space 110 of the outer gimbal 100. An inner gimbal 200, an annular housing 310 coupled to the shaft hole 120 of the outer gimbal 100, and is received in the central region of the housing 310 and its inner surface is the outer surface of the second shaft 210 and Torque motor 320 is in contact with, the front of the housing 310 is coupled to the torque motor 320 The cover 330 and the self-preloaded bearing 350 is fastened to the center of the cover 330 by the fastening bolt 340 to contact the inner surface of the hollow 211 of the second shaft 210 to prevent the separation from the negative It is configured to include a shaft coupling portion 300 made of.

The external gimbal 100 is a member that is rotatably coupled to a separate frame (not shown) to adjust the direction of the lens up and down, the frame member is formed in the center receiving space 110.

The plate surface of one side surface facing each other is formed through the shaft hole 120 is fastened to the shaft coupling portion 300 to be described later, the outer side gimbal 100 in a separate frame (not shown) to the outside of the other side facing each other The first shaft 130 is formed to protrude so as to be rotatably coupled.

At the periphery of the shaft hole 120, a plurality of fastening holes 121 for fastening the shaft coupling part 300 by a fastening bolt are formed through the circumferential direction.

In the center of the inner gimbal 200, a lens hole 220 through which a lens (not shown) for recognizing a target is coupled is formed, and a second shaft 210 protruding is provided at an outer side of one side surface facing each other. .

The second shaft 210 has a hollow 211 is formed so that the self-loading bearing 350, which will be described later, is inserted into the inside thereof and is in surface contact with the inner surface, and the size of the inner gimbal 200 is the outer gimbal 100. It is formed relatively smaller than the outer gimbal 100 to be accommodated in the receiving space 110 of the).

The shaft coupling part 300 is an annular housing 310 coupled to the shaft hole 120 of the outer gimbal 100, and is accommodated in the central region of the housing 310, and an inner surface thereof is coupled to an outer surface of the second shaft 210. The torque motor 320 in contact with the cover, the cover 330 is coupled to the front of the housing 310 to prevent the torque motor 320 is separated to the outside, and by the fastening bolt 340 in the center of the cover 330 The self-preloading bearing 350 is fastened to be in contact with the inner surface of the hollow 211 of the second shaft 210.

A plurality of insertion holes 311 are formed in the plate surface along the circumferential direction of the housing 310 to which the fastening bolt (not shown) is inserted to couple the housing 310 to the shaft hole 120 of the outer gimbal 100. The housing 310 is formed in a flange shape.

The torque motor 320 is a device for converting an electrical signal into a mechanical rotational displacement output. In general, the torque motor 320 includes a portion for converting an electrical signal into mechanical displacement by an electromagnetic force and a hydraulic amplifier portion for converting the electrical signal into a large output.

In order to constrain the rotation angle of the torque motor 320, the lower side includes a stopper 321 protruding to have a predetermined height along the thickness direction thereof and selectively contacting the side surface of the cut region of the cover 330. have.

The cover 330 is a member provided on the front surface of the housing 310 and the torque motor 320, and serves to prevent the torque motor 320 from being separated from the inner surface of the housing 310, the cover 330 In the central region, the self-preloaded bearing 350 is inserted into the hollow 211 so that the entire outer surface thereof protrudes to be in contact with the inner surface of the second shaft 210.

As described above, the central region of the cover 330 is provided with a self-preloaded bearing 350 is fastened by the fastening bolt 340, the fastening bolt 340 pressurizes the inner ring of the self-preloaded bearing 350 The fastening is preferably fastened to the cover 330 so that the inner ring is displaced with respect to the outer ring of the self-loading bearing 350.

The self-loading bearing is composed of a pair, and as shown in FIG. 8, the inner ring has a structure that protrudes outward to some extent compared to the outer ring. In the load-free state before preload is applied, the relative displacement of the inner and outer rings is determined by the amount of preload required by the gimbal system.

 The advantage of the combined bearing is that it does not require a separate structure such as shim to apply the preload to the bearing, and the preload is applied simply by pulling the inner ring as shown in the figure on the right. Can be.

However, since the relative displacement in the load-free state is very fine, the user cannot select a single bearing in a pair arbitrarily and the manufacturer selects a pair of bearings that satisfy the required relative displacement after precise measurement. It is effective to use on.

Since the bearing 350 of the gimbal system having a self-preload type bearing is inserted into the second shaft 210 of the inner gimbal 200 in a state where the preload is applied by being fastened to the cover, a separate shim for preloading the bearing 350 (Shim), the structure for mounting the inner ring, the outer ring is unnecessary, and thanks to the application of the self-preloading structure, unlike the conventional method, the separate micromachining for mounting only the bearing inner ring and the outer ring for the application of the bearing preload is unnecessary. have.

In addition, even if the bearing 350 is broken or needs to be replaced due to the end of life, the cover 350 is removed and only the bearing 350 needs to be replaced. Therefore, the operation is simple and due to the application of the self-loading bearing 350. For the preloading of bearings, the gimbal system is precisely machined so that only the inner or outer rings are mounted, which eliminates the cost of machining the gimbal system.

As described above, the gimbal system having a self-preloaded bearing of the present invention has been described through a preferred embodiment, which is not intended to limit the technical scope of the present invention, but is intended to help the understanding of the present invention.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. There is no saying.

100: outside gimbal 110: accommodation space
120: shaft ball 130: first axis
200: internal gimbal 210: second axis
211: hollow 220: lens ball
300: shaft coupling portion 310: housing
320: torque motor 321: stopper
330: cover 340: fastening bolt
350: self-preloaded bearing

Claims (4)

The first shaft 130 is provided with a receiving space 110 in the central region and the shaft hole 120 penetrates on one side surface facing each other and rotatably coupled to a separate frame on the outside of the other side surfaces facing each other. Formed outer gimbal (100);
The second shaft 210 having a hollow 211 formed on the outer side of one side surface facing each other is provided with a protruding lens hole 220 is rotatably coupled to the shaft hole 120 and a separate lens is fastened to the central area. An inner gimbal (200) provided and disposed in the accommodation space (110) of the outer gimbal (100);
An annular housing 310 coupled to the shaft hole 120 of the outer gimbal 100 and a torque received in a central region of the housing 310 and in contact with an outer surface of the second shaft 210. The motor 320, the cover 330 is coupled to the front of the housing 310 to prevent the torque motor 320 is separated to the outside, and by the fastening bolt 340 in the center of the cover 330 A shaft coupling part 300 which is fastened and is formed of a self-loading bearing 350 which is in contact with the inner surface of the hollow 211 of the second shaft 210;
Gimbal system having a self-preloaded bearing, characterized in that configured to include. The method of claim 1,
The fastening bolt 340 is fastened to the cover 330 so that the inner ring is displaced with respect to the outer ring of the self-loading bearing 350 by pressing the inner ring of the self-preloading bearing 350 Gimbal system with preloaded bearings. The method of claim 2,
The central region of the cover 330 is characterized in that the self-preloaded bearing 350 is inserted into the hollow 211 so that the entire outer surface of the cover 330 protrudes in contact with the inner surface of the second shaft 210. Gimbal system with self-preloaded bearing. The method of claim 3,
A portion of the lower side of the cover 330 is cut out, and the rotational motion of the torque motor 320 is restrained on one side of the outer surface of the torque motor 320 that is exposed to the outside through the cut-out area of the cover 330. Gimbal system having a self-loading bearing, characterized in that the stopper 321 is selectively provided to contact the side of the cut area of the cover (330).
KR1020100125582A 2010-12-09 2010-12-09 Two-axis gimbal system having self-preload type bearing KR101090858B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100125582A KR101090858B1 (en) 2010-12-09 2010-12-09 Two-axis gimbal system having self-preload type bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020100125582A KR101090858B1 (en) 2010-12-09 2010-12-09 Two-axis gimbal system having self-preload type bearing

Publications (1)

Publication Number Publication Date
KR101090858B1 true KR101090858B1 (en) 2011-12-08

Family

ID=45505806

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020100125582A KR101090858B1 (en) 2010-12-09 2010-12-09 Two-axis gimbal system having self-preload type bearing

Country Status (1)

Country Link
KR (1) KR101090858B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101302615B1 (en) 2011-12-30 2013-09-02 엘아이지넥스원 주식회사 Gimbal apparatus having flange type bearing
KR101817174B1 (en) 2017-10-20 2018-01-11 엘아이지넥스원 주식회사 Gimbal device
KR101865325B1 (en) 2016-12-28 2018-07-04 한화시스템 주식회사 Method for detecting rotor position of BLDC motor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200169296Y1 (en) 1997-11-19 2000-03-02 추호석 A pre-tention adjusting device of the ball screw shaft
JP2002277245A (en) 2001-03-16 2002-09-25 Tamagawa Seiki Co Ltd Space stabilizer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200169296Y1 (en) 1997-11-19 2000-03-02 추호석 A pre-tention adjusting device of the ball screw shaft
JP2002277245A (en) 2001-03-16 2002-09-25 Tamagawa Seiki Co Ltd Space stabilizer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101302615B1 (en) 2011-12-30 2013-09-02 엘아이지넥스원 주식회사 Gimbal apparatus having flange type bearing
KR101865325B1 (en) 2016-12-28 2018-07-04 한화시스템 주식회사 Method for detecting rotor position of BLDC motor
KR101817174B1 (en) 2017-10-20 2018-01-11 엘아이지넥스원 주식회사 Gimbal device

Similar Documents

Publication Publication Date Title
CN102686895B (en) Can the radial bearing means adjusted
EP2372188A2 (en) Speed change gear and manufacturing method therefor
US9964153B2 (en) Support device for bearing
KR101090858B1 (en) Two-axis gimbal system having self-preload type bearing
US10126124B2 (en) Surveying device having ball-point bearing
US20120027329A1 (en) Flange assembly
KR101992818B1 (en) Motor structure
CN110821966A (en) Axial clearance adjusting device
KR20160098437A (en) Shaft-bearing subassembly for a wind turbine transmission
JP4697658B2 (en) Positioning table device
KR20150124847A (en) Integrated support unit for servo motor and rectilinear movement apparatus including the same
CN219062247U (en) Assembly equipment for assembling laser radar bearing
CN209053960U (en) A kind of pivot structure
US10914616B2 (en) Encoder and rotatable device using same
WO2020075665A1 (en) Actuator of variable compression ratio mechanism for internal combustion engines
CN114839762A (en) Rapid reflector system based on transmissive application of eddy current sensor
US11522474B2 (en) Vibration wave motor and electronic apparatus including the vibration wave motor
CN109312835B (en) Robot, motor unit, and coupling unit
US20220213947A1 (en) Planetary reduction gear
JP6673605B2 (en) Method for manufacturing compressor and bearing positioning device for compressor
CN215890974U (en) Speed reducer
RU164912U1 (en) BEARING ASSEMBLY
JP2009079737A (en) Rotating shaft adjustment mechanism
JP4678165B2 (en) Linear motion table device
RU2487782C2 (en) Connector of modules

Legal Events

Date Code Title Description
A201 Request for examination
A302 Request for accelerated examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20140923

Year of fee payment: 4

FPAY Annual fee payment

Payment date: 20151023

Year of fee payment: 5

FPAY Annual fee payment

Payment date: 20161115

Year of fee payment: 6

FPAY Annual fee payment

Payment date: 20171011

Year of fee payment: 7

FPAY Annual fee payment

Payment date: 20181101

Year of fee payment: 8

FPAY Annual fee payment

Payment date: 20191125

Year of fee payment: 9