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Title:
BALANCE WEIGHT MECHANISM USABLE AS COUNTER-WEIGHT IN PRECISE GIMBAL SYSTEMS
Document Type and Number:
WIPO Patent Application WO/2021/015693
Kind Code:
A1
Abstract:
The invention relates to balance weight mechanism (A) providing reduction in torque generated on engine when different devices to be tested are connected to pitch axis without adding any weight thereon in two-axis precise motion simulators, enhancing engine position and load control performance.

Inventors:
TÜRKER CANER (TR)
ANAKLI METE (TR)
KARAKAYA GÜRKAN (TR)
Application Number:
PCT/TR2020/050386
Publication Date:
January 28, 2021
Filing Date:
May 06, 2020
Export Citation:
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Assignee:
ASELSAN ELEKTRONIK SANAYI VE TICARET ANONIM SIRKETI (TR)
International Classes:
F16F15/28; F16M11/12; G02B7/00; G03B17/56
Foreign References:
JP2006349131A2006-12-28
US20110187036A12011-08-04
EP3220038A12017-09-20
US4753128A1988-06-28
Attorney, Agent or Firm:
DESTEK PATENT, INC. (TR)
Download PDF:
Claims:
CLAIMS

1. A balance weight mechanism (A) providing reduction in negative effects caused by different devices to be tested in gimbal systems on control and load carrying performance of engine and eliminating use of any counter-weight and characterized by comprising;

• a spring (3) providing generation of momentum in counter direction of weight centre of different devices to be tested in the system

• a linear actuator (6) providing resetting of extra momentum created in system by different devices fully at 360 degrees and checking length of the spring (3) and thus enabling us to control balancing force generated by the spring (3).

2. A balance weight mechanism (A) according to claim 1 , characterized by comprising; cap pin (4) providing fixing of said spring (3) to a main rotary part (1 )· 3. A balance weight mechanism (A) according to claim 1 , characterized by comprising; a nut (5) providing fixing of said cap pin (4) to main rotary part (1 ).

4. A balance weight mechanism (A) according to claim 1 , characterized by comprising; a fixing pin (7) providing fixing of said linear actuator (6) to two- axis device surface in order to enable linear actuator (6) to follow the spring (3) during rotation.

Description:
BALANCE WEIGHT MECHANISM USABLE AS COUNTER-WEIGHT IN PRECISE

GIMBAL SYSTEMS

Technical Field

Invention relates to pitch axis of precise gimbal systems (stabilization systems).

The invention particularly relates to balance weight mechanism providing reduction in torque generated on engine when different devices to be tested are connected to pitch axis without adding any weight thereon in two-axis precise motion simulators.

State of the Art

Gimbal systems used today are mostly used for camera stabilization systems. Particularly, gimbal systems provide achievement of absolute clear shooting action scene or videos without any vibration. When different devices to be tested on pitch axis of said precise gimbal systems are inserted, different torques generated on pitch axis engine negatively affect position control and load carrying performance of engine. For that reason, a counter-weight is needed to be added in order to reduce torque in different direction in respect to different weights to be inserted.

In the current art, counter-weight parts are adjusted specifically for each weight against the axis of motion. However, spring systems capable to work only in certain intervals have been developed. Instead of inserting different weight for each different device, a mechanism allowing 360 degree rotation is needed.

During search conducted in literature, an invention numbered KR101617808B1 not similar to our invention but in the same technical field is encountered. The invention discloses a gimbal device comprising a camera balance controlling function automatically adjusting weight centre of gimbal independent of camera. Said document does not disclose a mechanism like a counter-weight to provide reduction in torques occurring on engine when a different device is inserted onto gimbal system.

As a result, due to above described disadvantages and inadequacy of existing solutions, it has been necessary to make development in the related art. Aim of the Invention

The invention has been developed with inspiration from existing situation and aims to eliminate the above mentioned disadvantages.

Main aim of the invention is to use a balance weight mechanism instead of a counter weight to reduce negative effect on control and load carrying performance of engine when different devices are located on pitch axis of gimbal systems for testing.

Another aim of the invention is to disclose an embodiment capable to rotate 360 degrees for each different device to be tested, thanks to balance weight mechanism.

A further aim of the invention is to prevent production of different counter weight for each different device to be tested. Thus saving in workmanship and cost is provided.

In order to achieve above aims, the invention is a balance weight mechanism providing reduction in negative effects caused by different devices to be tested in gimbal systems on control and load carrying performance of engine and eliminating use of any counter-weight and characterized in comprising;

• A spring providing generation of momentum in counter direction of weight centre of different devices to be tested in the system

• linear actuator providing fully resetting extra momentum at 360 degrees created by different devices in the system.

The structural and characteristics features of the invention and all advantages will be understood better in detailed descriptions with the figures given below and with reference to the figures, and therefore, the assessment should be made taking into account the said figures and detailed explanations.

Brief Description of the Drawings

Figure 1 is a general rear perspective view of balance weight mechanism disclosed under the invention.

Figure 2 is a general front perspective view of balance weight mechanism disclosed under the invention. Figure 3 is a view showing mounted status of balance weight mechanism on gimbal system disclosed under the invention.

Description of Part References

A. Balance weight mechanism

1. Main rotary part

2. Shaft

3. Spring

4. Cap pin

5. Nut

6. Linear actuator

7. Fixing pin

Detailed Description of the Invention

In this detailed description, the preferred embodiments of the balance weight mechanism (A) being subject of the invention have been described only for purpose of better understanding of the matter.

Invention is a balance weight mechanism providing reduction in negative effects caused by different devices to be tested in gimbal systems on control and load carrying performance of engine and eliminating use of any counter-weight and characterized by comprising; a spring (3) providing generation of momentum in counter direction of weight centre of different devices to be tested in the system. It also comprises a linear actuator (6) providing fully resetting extra momentum at 360 degrees created by different devices in the system. Balance weight mechanism disclosed under the invention comprises a cap pin (4) providing fixing of said spring (3) to a main rotary part (1 ) and a nut (5) providing fixing of said cap pin (4) to main rotary part (1 ). In addition, in order to enable linear actuator (6) to follow the spring (3) during rotation, it comprises a fixing pin (7) providing fixing of said linear actuator (6) to two-axis device surface. Balance weight mechanism (A) of the invention whose perspective view is given in Figure 1 and Figure 2 comprises seven different parts, namely main rotary part (1 ), shaft (2), spring (3), cap pin (4), nut (5), linear actuator (6), fixing pin (7).

Main rotary part (1 ) is located centrally onto shaft (2) part providing connection of gimbal to pitch axis and fixed by screw. Said main rotary part aims to enhance force created by spring balancing weight centre. Thus spring (3) having less spring constant is used in the system. Also main rotary part (1 ) is needed for enabling the spring (3) to balance the system 360 degrees. The spring (3) is fixed by help of nut (5) by inserting into cap pin (4). It is aimed to have spring (3) connection diameter bigger than cap of cap pin (4) and outer diameter of inserted nut (5). Thus removal of spring (3) from system during operation is prevented. Meanwhile, the spring (3) is trapped in a manner capable to make rotary motion between nut (5) and cap pin (4).

Thread is formed appropriate for thread details of nut (5) in a certain distance from cap pin (4) end. Floles to which cap pin (4) passes through at certain distance from centre are provided on main rotary part (1 ). Purpose of having two different cap pin holes on main rotary part (1 ) is to provide insertion in a manner spring (3) creates momentum in opposite direction of weight centre of different devices all the times. Cap pin (4), spring (3) and nut (5) are passed and inserted through hole located on reverse side of weight centre of different devices on outer side of main rotary part (1 ). Same nut (5) is also inserted on cap pin (4) on inner part of main rotary part (1 ) and thus falling cap pin (4) outside is prevented.

In balance weight mechanism (A) of invention, connection between the spring (3) and the linear actuator (6) and effects on the system are as follows: the spring (3) is extended through centring hole of linear actuator (6) and spring (3) and linear actuator (6) are interconnected. Linear actuator (6) is fixed onto appropriate surface of two-axis device. Fixing operation is executed by fixing pin (7) for enabling linear actuator (6) to follow spring (3) during rotation. The linear actuator (6) checks length of spring and enable us to control balancing force created by the spring. Flowever, as a result of having same momentum from different devices at different levels when system works but spring connected to cap pin (4) connected in opposite not giving same momentum physically at such levels, it is included in the system. When system works, a position control by linear actuator (6) similar to sinus graphic is conducted and extra momentum provided in system by different devices is completely reset at 360 degrees. Thus different torques created on two-axis moving system is eliminated and position control of engine and load carrying performance is enhanced.

The momentum required to reset momentum created in system is calculated for each level. The force needed to be applied by spring (3) according to such calculations is determined and linear actuator (6) position is estimated. Then linear actuator (6) position is checked and system is balanced for 360 degrees.