WO2020250001A1

WO2020250001A1 - Motion mechanism without vibration and no-noise telescopic crane of professional video camera

Info

Publication number: WO2020250001A1
Application number: PCT/IB2019/054795
Authority: WO
Inventors: Soroush HEIDARI KAYEDAN
Original assignee: Heidari Kayedan Soroush
Priority date: 2019-06-09
Filing date: 2019-06-09
Publication date: 2020-12-17
Also published as: CA3139805A1

Abstract

The present invention is a type of telescopic crane for the video cameras, which is used for the telescopic arm of the profile in which square profiles of different sizes are used. These profiles move inside each other for reducing the vibrations of the rail system and rollers within them. The rails have a circular cross section and moving wheels are driven on a grooved metal roller, as well as a large diameter motor with low speed is used to reduce the sound of the device.

Description

MOTION MECHANISM WITHOUT VIBRATION AND NO-NOISE

TELESCOPIC CRANE OF PROFESSIONAL VIDEO CAMERA

TECHNICAL FIELD OF INVENTION:

The present invention relates to the motion of the moving parts of a camera crane and also relates to roller structures on the rails, and in particular, to the fast-moving and non-slip motion camera cranes mechanism.

PREVIOUS KNOWLEDGE:

With the advent of video cameras, as well as measuring structures or machine tools used in precise and specific operations, the need to move the camera and devices in 3D space has created. The structures generally used for this purpose are based on single-dimensional motion on the rails and two-dimensional movement on wheels with the ability to change the direction of movement or combination of rails and cranes as well as wheels and cranes. Generally, the movement is carried out on a horizontal plane using wheel-chariots, and the movement in height and, in some cases, a slight movement to the sides is carried out by a crane mounted on the chariot. Cranes used specially for taking videos are often with fixed arm and movable joints cranes . In this type of crane, the presence of hinged joints in the crane arm causes the arm to be raised and extended, and consequently the effective length of the arm is increased. This length increase is often limited to the maximum length of the fixed arm of the crane. The multiplicity of arms to reach the maximum required length causes a very high crane weight. Also, the opening and closing of such cranes, which are carried out with a cable system or hydraulic system, have tension at the beginning and end of the motion, in which the shaking of the beginning and end movement is evident in the final video . So, in order to reduce the amount of noise in the video, it is often omitted from the beginning and the end at the time of editing , and we will not be able to captivate a continuouse imaging of a plan in a constant manner, and then the crane does not move .

With the advancement of the technologies presented in the crane section, it was also possible to use telescopic cranes in the field of crane imaging. In the early generation of telescopic cranes, the use of a circular profile allows maximum control of the crane motion, and uses tools such as parallel telescopic cylinders with a crane arm or the presence of grooves and rails to prevent the crane arm from rotating. Also, with the advancement of existing mechanisms, the use of triangular and rectangle profiles was also common. Square type try to achieve maximum strength, and in triangular profiles, attempts were made to achieve minimum twisting and vibration. Following the entry of the rail into the crane's mechanism, the control over the motion of the crane parts was made more than before. The presence of rails with a triangular cross-section with maximum control against lateral forces would have the least vibration during the opening and closing of the crane. Examples of existing structures related to present invention includes patent No. 4,474,439, dated Oct. 2, 1984, which provide support for the installation of the camera and the camera system and the required changes and elevation.Another patent No. 5,737,657 that was filed at the US Patent and Trademark Office in 1998, in which the camera connection point to quick install is provided. Also in the patent No. US 6,769,771 B2 devices for motion video taking is provided that is made up of a chariot equipped with a crane with an arm equipped with a hydraulic jack, which has the ability to increase the length by chaning the angle of the joint. Also in patent No. EP 2,226,677 Al, which is based on prior inventions filed in the United States under Nos. 584561, US 616587, US 840625, a mobile camera crane is displayed to carry a video-camera using movable arms. Also in another patent No.US 7,037,006 B2, same inventor , camera crane had evolved . In another patent No.US 8,251,599 B, a crane mounted on- vehicle camera is provided, in which it was designed to maximize control over crane vibrations by using a stud rail and a stud-shaped wheel which been used to minimize vibrations with the help of these rails with embedded wheels. In a further patent No. US 9,440,832 B2, a crane rectangle profile be installed on the roof of the car, which, if necessary, will be possible to increase its length or change its angle.

Also, in the sample provided by“ Service Vision“ company the use of rails with a triangular cross-section, which is screwed onto the body of the crane, is seen.

In imagery at high places , we need a crane that rectangle profile be installed on the camera, and with control, direct the camera to the subject, and we rectangle profile increase the length of the crane arm without vibration with low noise. In crane's movements, it is very important to be mute and not vibrated, for example, the image that is shaken when opening the crane arm, is not acceptable for accurate imaging, as well as if the sound of the engine or the rails is heard when opening and closing , the sound recorded for scenes that are live and not capable of sounding for them has a poor quality.

Several methods have been used to build a telescope crane in similar samples, which, of course, either sound of the engine of motors is heard or relatively vibration, have made it difficult to make crane production. These include the following: Methods such as the use of rails and wagons as a system of moving profiles within each other, which cause a problem with the heavy weight of the rails, as well as a lot of noise, or the use of plastic or polyamide wheels that both vibrate and make some sound and almost all of the existing models use high-end servo motors make sound, and their production method is very complex and time-consuming.

CURRENT PROBLEMS AND THE PURPOSE OF PRESENT INVENTION:

Among the problems encountered in previous structures, there are small vibrations and lack of control over the vibrations created during the opening and closing of the crane. Also, the mechanisms available during opening and closing due to their design have created additional sounds that these additional sounds in the event of simoulateneous sound and filming rectangle profile cause noise in the final sound and reduce the quality of sound. Also At the beginning and the end of the motion, the vibration moves to the maximum that creates vibrations causing jump in the imaging.

The purpose of the present invention is to provide a method for the production and construction of cranes with minimum vibration and operation sound . The purpose of design and production is to produce a vibration-free without noise product that rectangle profile be used in professional film taking.

INVENTION DESCRIPTION:

The present invention is a mechanism for moving profiles with a quadrilateral cross-section and telescoping in one another, which rectangle profile create with appropriate motion speed create the minimum vibration and the sound resulting from the movement.

For this purpose, a kind of aluminum rectangle profile is customized and designed for this purpose. The cross-section of this rectangle profile is rectangular (Fig. 5). The present rectangle profile is produced by the process of extrusion and thus have the same uniformity and shape. In the inner part of this rectangle profile , four stud-like grooves are located at four angels, each of which with a groove opposite to each other and two by two on the floor and ceiling profiles are opposite each other. The greater thickness of this section of the cross-sectional profile allows the formation of a uniform stud along the profile. Also, in the outer part of the present rectangle profile , there are four identical grooves but extruded out of the rectangle profile . The circular shape in the cross-sectional area of the entire stud has made it possible for a cylindrical steel rail to be hit in a manner in each of the studs, which, after the steel rod is installed , a part of rod is locked into aluminum rectangle profile s completely due to the use of the aforementioned stud, and a smaller portion of the cross-sectional area of the rod is protruded from the inside of the stud (Fig. 16).

By placing four steel rods in the structure of the studs on each of the rectangle profile , as well as four similar rods in each of the internal studs, it is possible to equip the structure of the stud to four internal and external rails. By making the desired number of rectangle profile s in such a way that the size of each rectangle profile is smaller than the previous rectangle profile , in such a way that each rectangle profile be inserted in its previous rectangle profile , the desired number of rectangle profile be put into each other in the desired length for the final length of the crane, but the length should be such that at the end of the entire opening of the crane, this increase in the length and torque created due to the weight of the crane does not break the pieces.

Now, with the installation of roller wheels (Fig. 4), which has a groove around the rollers in its surroundings, and this groove has an arched shape equal to the circle of the same diameter with the previous rails, at the beginning of each profile on end section and bottom and with the help of the fixtures in the rectangular cross sectional profile, the stud allows to move in such a way that they rectangle profile put their outer rails in the four-wheel drive, and also the four similar wheels, which are idler- shaped in the ends of the inner rectangle profile s are mounted on each side of the inner rectangle profile s (Fig. l). In this way, when each of the rectangular cross sectional profiles moves inside the other one , the outer rails of the external rectangular cross sectional profiles rails on the outer wheels of rectangular cross sectional profiles are installed and vice versa internal rectangular cross sectional profiles wheels are placed on internal rails of rectangular cross sectional profiles . Due to the circular cross-section of the rails, the forces applied to the entire surface of the rails to the structure of the crane are tolerated, as well as the total weight of the internal components of each of the rectangle profile s forming the crane due to the circular shape of the torsion of each of the rollers as distribution is transferred onto the rails (Fig. 2), and the surface of the rollers connecting the rails changes from a point to point or linear position to arched position and allows more force to be tolerated. Also, due to the shape of the existing rollers, the roller connection to the rails is completely identical, and with the exception of the vertical forces, it is possible to withstand forces with an un vertical result on the rails, so that when the vertical force enters the reaction force of the rails of the resulting force is completely neutralizes and, given the movement of several crane pieces inside each other, each part's weight is always thrown off by the rollers in the front of the pre-rectangle profile front position ,and considering the force exerted by the outboard section, each piece of the previous torque was created around the bottom rollers, which is due to the levering of each unit by considering the roller point of reliance on the other side of the unit which is located on the previous profile, will be applied to the opposite. Due to the presence of internal rails in previous rectangle profile , with the help of rollers, the ends of the inner rectangle profile s are transmitted to these rails. Thus both weight and reaction forces of the torque created at the end of the piece is neutralized by the use of the pair of rollers at the beginning of the outer part and the end of the inner part. (Fig. 9). Also, the presence of a pair of similar rollers at the end of the inner part and the lower part, as well as the pair of rollers at the end section of the outer part and the upper part of the piece, rectangle profile control and neutralize the movement of the inner parts of the crane into each other in the best way and in the event of unusual forces due to the camera moves in three-dimensional space, or extreme wind currents, or any other force that forces the force vector to reverse in any of the connections. Thus, the movement of each piece of crane is controlled entirely within the range of eight parallel rails, with four rails outside and four rails in each of the consecutive sections of the crane. Considering the largest rectangle profile of crane that is attached to the chariot, and the mold and control equipment is mounted on it (Fig. 12). As the largest crane profile, it rectangle profile be said that the primary rectangle profile only have a rail in its internal section (Fig. 18) and does not need to have a rail in its external part, and also has the latest profile designed as the last piece of crane having the lowest cross-sectional dimensions have rails only in the outer part (Fig. 19). The proposed rails rectangle profile be designed in such a way that they have different sizes and diameters based on the amount of force they have on them. The existence of parallel rails with a circular cross-section allows for any force applied to the crane from any direction to always be ideally placed by two or more neutral rails and vibration and slip parts. The camera location is at the end section of the last piece of crane (Fig. 20) allows the camera to be placed at the maximum crane height and the maximum distance between the end section of the rectangle profile vas and the chariot. In the section of minimizing the noise caused by the crane motion after the design of the rolling fittings and the removal of sliding friction is the only factor of creating noise and sound as well as the resulting vibrations, the motor and gearbox are the motor structure of the crane and the balance weights. In contrast to the previous inventions, instead of using a low-power and high-speed motor, which generally generates noise in the engine, as well as additional noise in gearbox gears, a more powerful engine rectangle profile be used. With the lower speed, it creates the required power and controls it by using the inverter around it , so that at the start of the engine, the engine starts from its minimum distance and increases to reach the desired range, as well as at the end when the engine send sections, the engine will slowly send section at the desired distance . In this way, at the beginning and end of the motion, we will have minimum tension and torque variations, which will result in the amount of vibration being minimized. The output of the gearbox is transmitted to the motor structure using a timing belt (Fig. 3). The presence of polymer belt in the connection between the gearbox and the motion system causes a large part of the vibrations obtained from the starting and send sectionping the gearbox to be neutralized by long belt lengths and the vibration diagram is always tapped and level. In order to reduce the weight of the crane in the first stages with a higher diameter and higher strength, a triangle shape rectangle profile be formed into the profile of the crane using the corresponding triangular structures on both sides to create empty spaces using laser cutting or CNC machining in a tmss-like manner ( Fig. 7), thus reducing the total crane weight in proportion to the extracted parts.

DESCRIPTION OF A PRACTICAL EXAMPLE: In a practical example of the present invention for the production of a non vibrational , mute , electrical telescopic crane uses a shaft with a circular cross- section of 6 mm in diameter made up of hard chrome , drive as a rails on a circular wheel. The rails inside and outside the profiles in the grooves placed in the four internal and external comers are placed. We use aluminum alloy 6061 profile which has been heat-treated and extruded, and is designed to produce a telescope electric crane without vibration and noise. First, profiles are designed to produce molds , and then by using extmsion method each required section is produced.

Each of the profiles are placed from large to small, which is five, respectively, of the components of the crane arm . The rails are replaced in the profiles fitted and grooved wheels are installed which in the first profile only the wheels are placed in front of it and in the last profile only at the end.

In order to build an electric telescopic crane without vibration and sound, we need at least five profiles, depending on the length of each profile and the final length of the crane telescopic arm, as well as the weight to be tolerated, the length and number of each arm is determined , as well as the chrome hard drive shaft inside the grooves created in the profiles are used as rails. The wheels are made of stainless steel 304, which is produced by CNC machining, and wheels rotate inside the rails inside the profiles. On wheels, a semicircular groove is created that matches the rails with a circular cross-sectional shaft, and cause the rails and wheels to move in a straight line without moving and shaking.

The wheels used are relatively large and with 6 rounds rotate the entire length of the rails, and because of the low number of wheels per second, only one round at the highest speed, this reduces the sound.

In the first profile or the largest profile, only four rails are inside, and the second- end profile wheels move on these four rails. In front of the front profile, there are four wheels that are connected to the profile body with the shaft and reinforcement part. In the second profile, there are also four wheels that are attached to the profile body with a shaft and reinforcement part. In total, eight grooved wheels were used in the second profile, with four at the end of the profile for moving within the first profile (larger profile) and four for moving the third profile from within the second profile. Finally, after perfectly assembling each of the five profiles inside each other, a telescopic arm with rounded rails, which generates smooth and fluid motion with a grooved wheel, making the profiles telescopically easy to get out of each other.

In order to pull out one of the profiles, they all get out of each other in the same way, and are connected by tow wire and bearings , which are mounted under each profile and passed through the towing wire and transmits the profile to the next profile , and each of the profiles draws the smaller profile inside it out.

The two ends of the towing wire connect to the larger profile body (first) and after connecting the bearings in the second profile to the third profile, and also to the fifth profile, which is the smallest profile, the profiles are connected together and thus by out pulling a profile ,the rest of the profiles come out to the same extent from each other. The method of moving from the gearbox to the crane arm is by means of the belt from the inside, so that the timing belt is intended to move the gearbox to the second profile and is to move the rotary gearbox to the second profile and turn the rotary motion into a linear motion .

The belt connects from the inside of the profile from one side to the gearbox pulley and on the other hand to the idler pulley that rectangle profile be tuned so that the belt rectangle profile be tightened or loosened. The belt buckle connects to the second profile and causes the second profile to move out of the first profile.

In the engine part and the rotary motion system, a line is used to reduce the sound from a 16 cm diameter motor with low speed and high torque, and in a deceleration of 1 to 7 and converting 500 rpm to 70 rpm at the gearbox output is done. Due to the gearbox output speed of 70 rpm per minute , and the pulley at the exit of the gearbox, with a diameter of about 3 centimeters, each belt displaces 10 centimeters.

With just 10 rounds in 10 seconds, the crane opens completely, which reduces the sound of an electrically-telescopic crane motor without sound and without vibration which is felt in a great sense .

In the transmission of power and the change of engine rotation motion, a second profile rotates by timing belt that uses a belt instead of filaments and connects to the second profile from below by a towing belt . The automatic balance adjustment system, which, with the opening and closing of the telescopic crane automatically adjusts the balance of the crane, works in such a way that whenever the crane is open, the weight is drawn to the end of the first profile, and whenever the crane is closed, the weight moves forward . The weights are chariot like and move with the help of the rails embedded on the first profile. The opening and closing of the crane are driven forward and backward by three tow wires connected from the inside to the second profile and two rotational bearings. As the profile is pulled out by the gearbox, the second belt is pulled up and the towing wire is pulled, and the bearing changes the direction of the crane, and the weight is pulled back when it goes out.

DESCRIPTION OF DRAWINGS: The drawing number 1 shows how to put the rectangle profile of number 2 in rectangle profile number 1.

The number 2 drawing shows how to connect the rail to the roller.

The drawing number 3 displays the timing belt connection to the rectangle profile of number 2 while in rectangle profile number 1. The fourth drawing shows the shape and components of the rollers of the movement.

Drawing 5 shows the shape of the profile and shows its cross-sectional shape.

Drawing 6 shows how two profiles are placed in the middle of the crane.

The drawing 7 shows the explosion of a unity of the crane. The drawing number 8 depicts the beginning and the end of a unit.

Drawing number 9 depicts the map of the deployment of the two-unit rails deployed in each other. The 10th drawing depicts the explosive shape of the rollers of the end section of the unit.

Drawing 11 depicts the explosive shape of the front rollers of each unit.

Drawing 12 shows the first crane unit with balance weights. Drawing 13 shows the first unit of crane.

Drawing 14 depicts how the rollers of the end of the second unit are displayed with the internal rails of the first unit.

Drawing 15 shows the position of the crane rails when closed.

Drawing 16 depicts rollers sitting on the rails. Drawing 17 shows how to connect the support to the crane end section.

Drawing 18 displays the cross-section of the first profile that forms the main body of the crane.

Drawing 19 shows the cross-sectional profile of the crane end section.

Drawing 20 depicts the explosive shape of the crane end section.

Claims

CLAIMS :

1. The invention of the vibration-free and noise-less motion mechanism of the telescopic crane of professional video camera including: a series of rails with circular cross-section and roller like wheels with concave grooves in the form of moving rails and aluminum profiles with the possibility of installing rails with circular cross-section and engine and gearbox system for the propulsion system and the system of balance weights and the system of movement transmition tow belts to move the crane telescopic structures.

2. The invention of claim 1, in which the cross-section of the telescopic parts of the crane is rectangular with the ability to install 4 rails in the upper and lower parts of the outer section and four rails in the ceiling and floor section of each cross section.

3. The invention of claim 1, in which the telescopic forming profile of the crane can be of aluminum or composite or of any other light metal.

4. The invention of claim 1, that the rails used in it are steel and has a circular cross-sectional shape.

5. The invention of claim 1, that the rollers used on rails have a groove corresponding to the rails embedded on the telescopic sections.

6. The invention of claim 1, that the number of crane arm sections can be a certain number of sections with the same mechanism.

7. The invention of claim 1, that each section of the crane arm can have 8 rails in the exterior and interior sections .

8. The invention of claim 1, that the connection of the second section to the transfer system is carried out using the Timing Belt .

9. The invention of claim 1, that the weight of any section of the crane arm can be reduced by laser cutting or machining, like a truss.

10. The invention of claim 1, that the integrated motion system attached to telescope increases the same length for each section of the crane arm.

11. The invention of claim 1 , that the connection of the roller to the rail causes the telescope of the crane to tolerate and neutralize both vertical and lateral forces , thereby preventing the movement of the crane arm to the sides and, consequently, the possible shaking of the crane.

12. The invention of claim 1, that the first section of the telescopic crane only in the interior and the last section of crane is only in its external part is equipped with rails.