WO2013115735A2

WO2013115735A2 - Fixing and driving mechanism with spiral ball duct

Info

Publication number: WO2013115735A2
Application number: PCT/TR2013/000008
Authority: WO
Inventors: Kerim AKYILDIZ
Original assignee: Akyildiz Kerim
Priority date: 2012-02-01
Filing date: 2013-01-28
Publication date: 2013-08-08
Also published as: TR201201188A2; WO2013115735A3

Abstract

This invention relates to a fixing and driving mechanism with spiral ball duct, which is designed to replace the main shaft component in spiral lifting systems and developed to provide additional functions that cannot be provided by the existing mechanisms, as well as improve working conditions by realizing the functions provided by existing mechanisms in a different manner.

Description

PATENT SPECIFICATION

FIXING AND DRIVING MECHANISM WITH SPIRAL BALL DUCT FIELD OF INVENTION

DEFINITION OF INVENTION The driving mechanism according to this invention is designed to improve the operating principle of the spiral lifting mechanism. Since there is no other machine or system operating based on this principle, there is no other similar product except for the existing mechanism. The mechanism according to this invention is designed to replace the main shaft component used in the existing mechanisms and to eliminate the unfavorable parameters determined in that component.

The unfavorable parameters observed in the existing spiral lifting mechanisms are given below: a) The cost of the cam bearing mechanism is very high.

b) Installation of the part is time-consuming and difficult.

c) The part drives the system in one direction.

d) The part cannot be manufactured below a definite size.

e) It is not suitable for mass production.

The most important difference between the product according to this invention and the existing mechanisms is that the system comprises a part specifically designed depending on the required function. Since the cam bearing, which is one of the most important components of the existing systems, is imported from foreign countries, the general structure of the system is created based on this component. However, the existing system results in high costs, inability to design it in the required sizes, and difficulties in installation.

Advantages provided by the fixing and driving mechanism with spiral ball duct developed according to this invention are listed below:

• The system according to this invention consists of parts, which are suitable for mass production.

• A more efficient and sensitive mechanism is designed in terms of fixing and driving.

• It allows operation under load (pulling, compression load) in both directions.

• Since there are many cam bearings in a driving component with cam bearing, its cost is very high. The mechanism according to this invention eliminates the need for cam bearings, decreases the number of installation and minimizes the costs.

• Installation of the cam bearings on the main part is a time-consuming and difficult process in production. The mechanism according to this invention facilitates such processes.

• The forces applied on the helical band in the existing mechanisms are asymmetrical, so the mechanism operates in one direction. The mechanism according to this invention balances such forces and thus the mechanism can be operated in both directions.

• «The mechanism developed applies compression force at more points on the helical band compared to the existing mechanisms and this compression force is applied equally on both sides of the band. Thus, the mechanism becomes more stabile and resistant. This feature extends the service life and operating capability of the mechanism.

• The difference in wall thicknesses between the interior and exterior surfaces of the helical band increased when the wrapping diameter of the band is decreased. This difference in wall thicknesses causes small gaps while fixing the band in the systems with a cam bearing. Such gaps affect fixing and operation of the system and may cause failures in the system in time. Therefore, if any existing mechanism is manufactured under a definite diameter, such problems will occur and this will constitute a restriction while determining the sizes of the mechanism. Since the compression force applied on the helical band in the part according to this invention is a point compression, the heights of the interior and exterior ball ducts can be adjusted. Thanks to this adjustment, the helical band can be fixed securely even if it is wrapped with smaller diameters and smaller mechanisms can be manufactured. Thus, smaller mechanisms can be manufactured, which are difficult to manufacture using the existing methods.

• This part, which is used in the existing spiral lifting systems, is the most expensive and important part of the system in terms of installation. The part according to this invention is manufactured using metal injection method. Thus, a more advantageous part is obtained in terms of both production speed and costs. The main operating principle of the system according to this invention is given below:

It can be defined as a spiral geometry by installing a cylindrical pipe on the cam bearings with a definite angle of climb. This geometry may seem asresemble to screw pitches. The helical band installed by moving along this spiral path created by the cam bearings raises one screw pitch created in one full round. Thus, the system can operate without friction. Here, the main purpose is to drive the helical band on a surface without friction. This frictionless surface is created linearly in the system with cam bearings. The frequency of such lines that create this surface is determined according to the diameter of the cam bearing used. For example, 12 cam bearings are required to create one single round spiral pitch on the cylindrical pipe with a diameter of 40 mm. Based on this example, it may be concluded that the helical band should contact the frictionless surface at 12 linear points.

Cam bearings are required to fix the upper part of the helical band as its lower part. The number of cam bearings that will have an effect on this surface is decreased by half because the system is designed to carry the load in one direction.

In the product according to this invention, the surface geometry consists of specific parts with specifically processed surface geometry. Thus, the limitations in the existing system are eliminated by the system according to this invention and a more advanced mechanism is produced in technical terms. For example, since the surface, on which the helical band will operate, is specifically manufactured to include balls, the number of the contact points is 8 times that of the contact points in the example given above. This allows a more stabilized structure to fix and operate the band.

Since the parts used in the system according to this invention to fix and operate the helical band are produced using the metal injection method, they are considerably cheaper and can be produced domestically. Thus, dependency on foreign countries is decreased in production.

In the existing mechanism, the contact between the cam bearing and helical band is linear and cannot be changed. However, since the helical band is manufactured by wrapping, different wall thicknesses are observed on its interior and exterior sides. This difference in wall thicknesses requires contact points at different heights on the interior and exterior sides of the helical band in order to align it accurately. The difference in the wall thicknesses of the helical band increases with the decrease in the wrapping diameter and this imposes a limitation on the size of the existing mechanism.

The mechanism according to this invention allows for production of smaller mechanisms. Thus, the heights of the interior and exterior ball ducts can be adjusted in the product according to this invention. This adjustable height allows for accurate alignment of the helical band and prevents gaps.

Since the system according to this invention operates based on the principle of coupling two bands together, the height adjustment of the ball duct is very important in order to fix the helical band and to allow robust operation of the system.

The existing mechanism was designed to operate under compression force. The load is carried by being transmitted to the bearings over the cylindrical pipe formed by coupling two bands. There, the part associated with the bearings is the helical band. Thus, in the mechanism according to this invention, the bearings are located more frequently at the side of the helical band, which bears the load. A number of bearings, which will allow for fixing the helical band, are located on the upper side. This number is half the number of bearings on the lower side.

If it is required to modify the existing system to achieve bidirectional operation, it will be required to increase the number of bearings on the upper side. But this will increase the cost of this part, which is already expensive. The mechanism according to this invention not only decreases such costs but also allows bidirectional operation. In other words, the system according to this invention can work against both compression and traction loads. Some features that can be developed more in this invention may be listed as follows:

The spiral path that fixes the helical band may be made longer using new techniques and thereby the robustness and load-carrying capability of the system can be increased. In addition, decreasing the installation parts using different production techniques will allow a more effective system in terms of production and cost-effectiveness.

PARTS AND SECTIONS OF INVENTION

1. Helical band upper fixing part

2. Helical band lower fixing part

3. Upper ball return part-1

4. Upper ball return part-2

5. Lower ball return part-1

6. Lower ball return part-2

7. Upper ball duct cover

8. Lower ball duct cover

9. Frame connection part carrying horizontal band

10. Mechanism fixing part

11. Helical band storage chamber

12. Conical screw

13. Helical band

14. Compression part

SHORT DESCRIPTION OF DRAWINGS Figure 1. Assembled perspective view of the mechanism according to the invention

Figure 2. Assembled frontal view of the mechanism according to the invention Figure 3. Disassembled perspective view of the mechanism according to the invention

Figure 4. Top view of the mechanism according to the invention

Figure 5. Top perspective view of the mechanism according to the invention Figure 6. Side view of the mechanism according to the invention

Figure 7. Side view of the mechanism according to the invention from another direction

DESCRIPTION OF INVENTION

The fixing and driving mechanism with spiral ball duct according to this invention comprises a helical band upper fixing part (1), helical band lower fixing part (2), upper ball return part-1 (3), upper ball return part-2 (4), lower ball return part-1 (5), lower ball return part-2 (6), upper ball duct cover (7), lower ball duct cover (8), frame connection part carrying horizontal band (9), mechanism fixing part (10), helical band storage chamber (11), conical screw (12), helical band (13) and compression part (14).

Functions of the parts and components of the product according to this invention are described below:

Helical band upper fixing part (1): This part (1) allows for fixing the helical band (13) at any pitch height. This operation can be performed using the balls in the ball duct bored on the part (1).

Thus, when the helical band (13) comes into contact with the balls during operation of the mechanism, the system shows resistance to the rolling force rather than the friction force. The band (13) thereby performs its function in the system smoothly.

Helical band lower fixing part (2): The function of this part (2) is the same as that of the helical band upper fixing part (1). At the same time, this part (2) is designed to apply a force on the lower surface of the band (13), which is equal to the force applied by the helical band upper fixing part (1) on the upper surface of the helical band (13). Thus, the helical band (13) is fixed securely between two ball surfaces (Figure 2). Upper ball return part-1 (3): While the system is operating, the balls move together with the helical band (13) on which they apply compression. At the end of the ball path, the balls are transferred to the ball path on the upper side via this part (3). This part (3) allows the balls to circulate in the upper and lower ductsallows ball flow to the upper and lower ducts.

Upper ball return part-2 (4): The function of this part (4) is to allow the balls to circulate in the ducts of the upper fixing part (1).

Lower ball return part-1 (5): The function of this part (5) is to allow the balls to circulate in the ducts on the lower part (2).

Lower ball return part-2 (6): The function of this part (6) is to allow the balls to circulate in the ducts on the lower part (2).

Upper ball duct cover (7): This part (7) is to cover the upper return duct and to ensure that the balls are operated in a closed chamber.

Lower ball duct cover (8): This part (8) is to cover the lower return duct and to ensure that the balls are operated in a closed chamber. Frame connection part carrying horizontal band (9): This part (9) is the part that will be used to connect the chamber, in which the horizontal band that will be coupled with the helical band (13) will be stored, and to the frame mechanism that will transmit the movement from the electrical motor. Mechanism fixing part (10): This part (10) allows for fixing the entire mechanism in its operating area. Helical band storage chamber (11): This part (11) accommodates the helical band (1 ) while it is deflated.

Conical screw (12): This part (12) is a part designed to install the upper and lower part covers.

Helical band (13): This part (13) is one of two parts that form the carrier arm of the system. Compression part (14): This part (14) is used to couple the helical band (13) and horizontal band by applying compression on them.

The mechanism according to this invention is installed as follows:

The helical band upper fixing part (1) is screwed on the helical band lower fixing part (2) through the cylindrical surfaces of the central hub by 3 screws.

The upper ball return part-1 (3) and upper ball return part-2 (4) are screwed on the helical band upper fixing part (1) through the installation surfaces at the beginning and end of the spiral ball path by 2 screws. The lower ball return part-1 (5) and lower ball return part-2 (6) are screwed on the helical band lower fixing part (2) through the installation surfaces at the beginning and end of the spiral ball path by 2 screws.

The upper duct cover (7) and lower ball duct cover (8) are installed on the ball ducts bored for return paths of the fixing part (1) and helical band lower fixing part (2). The conical screw (12) is screwed in the holes bored previously and the installation is completed. The frame connection part carrying the horizontal band (9) and the helical band storage chamber (11) are coupled by the notch opened at the lower side of the helical band lower fixing part (2) and installed together at the bottom by 3 screws.

The compression part (14) is installed to the frame connection part carrying the horizontal band (9) by 3 screws.

The entire system is installed on the operating surface by the mechanism fixing part (10) and thereby the entire system is installed.

Claims

1. This invention relates to a fixing and driving mechanism with spiral ball duct, characterized in that it comprises a helical band upper fixing part (1), helical band lower fixing part (2), upper ball return part-1 (3), upper ball return part-2 (4), lower ball return part-1 (5), lower ball return part-2 (6), upper ball duct cover (7), lower ball duct cover (8), frame connection part carrying horizontal band (9), mechanism fixing part (10), helical band storage chamber (11), conical screw (12), helical band (13) and compression part (14).

2. This invention relates to a fixing and driving mechanism with spiral ball duct, characterized in that it comprises a helical band upper fixing part (1), which allows for fixing the helical band (13) at any pitch height, which performs this operation using the balls in the ball duct bored on it, which facilitates the system to show resistance to the rolling force rather than the friction force when the helical band (13) comes into contact with the balls during operation of the mechanism and allows the band (13) to perform its function in the system smoothly.

3. This invention relates to a fixing and driving mechanism with spiral ball duct, characterized in that it comprises a helical band lower fixing part (2) whose function is the same as that of the helical band upper fixing part (1) and which is designed to apply a force on the lower surface of the band (13) that is equal to the force applied by the helical band upper fixing part

(1) on the upper surface of the helical band (13), and which thus allows for fixing the helical band (13) securely between two ball surface.

4. This invention relates to a fixing and driving mechanism with a spiral ball duct, characterized in that it comprises an upper ball return part-1 (3), which allows the balls that move together with the helical band (13) on which they apply compression when the system is operated to transfer to the ball path on the upper side at the end of the ball path and which allows the balls to circulate to the upper and lower ducts.

This invention relates to a fixing and driving mechanism with a spiral ball duct, characterized in that it comprises an upper ball return part-2 (4), which allows the balls to circulate in the ducts of the upper fixing part (1).

This invention relates to a fixing and driving mechanism with spiral ball duct, characterized in that it comprises a lower ball return part-1 (5), which allows the balls to circulate in the ducts on the helical band lower fixing part (2).

This invention relates to a fixing and driving mechanism with spiral ball duct, characterized in that it comprises a lower ball return part-2 (6), which allows the balls to circulate in the ducts on the helical band lower fixing part (2).

This invention relates to a fixing and driving mechanism with spiral ball duct, characterized in that it comprises an upper ball duct cover (7), which covers the upper return duct and allows the balls to be operated in a closed chamber.

This invention relates to a fixing and driving mechanism with spiral ball duct, characterized in that it comprises a lower ball duct cover (8), which covers the lower return duct and allows the balls to be operated in a closed chamber.