WO2011013929A2

WO2011013929A2 - Tension bearing

Info

Publication number: WO2011013929A2
Application number: PCT/KR2010/004662
Authority: WO
Inventors: 최윤수
Original assignee: Choi Yun Soo
Priority date: 2009-07-27
Filing date: 2010-07-16
Publication date: 2011-02-03
Also published as: WO2011013929A3; KR100933060B1

Abstract

The present invention relates to a tension bearing, which is one of various auxiliary elements provided in a vehicle engine. The tension bearing is driven by a crank shaft of the engine via a belt, and serves as an essential element for power transmission of an engine belt system, applying initial tension to the belt and preventing vibration thereof. To describe in more detail, the tension bearing includes: a cage integrally formed with belt supporting threads on an outer peripheral surface, and having a shaft main body coupling hole formed inside and annular spaces formed between an inner surface of a pulley and a shaft main body; and the pulley formed with roller bearing mounting grooves at both sides of the shaft main body coupling hole. Furthermore, the tension bearing includes: a plurality of rollers and springs received in the cage, the springs supporting the rollers; the shaft main body mounted in the pulley to be able to rotate with respect to the pulley and concentrically disposed in the pulley in the radial direction; the roller bearings axially disposed in the annular spaces formed between the pulley at both sides of the shaft main body coupling hole and the shaft main body; and washer rings secured at both side ends of the plurality of rollers in contact therewith. The tension bearing of the present invention has an advantage in the economic sense since working time is reduced in the manufacture and maintenance thereof. In addition, it is possible to improve profitability since maintenance and the shape and assembly of the components are simplified.

Description

Tension Bearing

According to the present invention, various auxiliary mechanisms provided to an automobile engine are driven through a belt by a crankshaft of an engine, and are an essential element for power transmission of an engine belt system and a tension bearing which serves as an initial tension part of the belt and anti-shake. It is about.

In more detail, the belt support screw thread is integrally formed on the outer circumferential surface, the shaft body coupling hole is formed on the inner side, and the cage has a cage formed with an annular space between the inner surface of the pulley and the shaft body. Both ends of the coupling hole is provided with a pulley formed by including a roller bearing mounting groove. In addition, a shaft having a plurality of rollers accommodated in the cage and a plurality of springs accommodated in the cage and supporting the plurality of rollers, the shaft is rotatable with respect to the pulley, and disposed in the radial direction concentrically in the pulley The main body is loaded inside the pulley, and the roller bearings are disposed axially in an annular space formed between the pulleys and the shaft main body at both end portions of the shaft body coupling hole, and seated against both side ends of the plurality of rollers. It relates to a tension bearing formed by including a washer.

The Product Liability Act, which is currently in operation, seeks to relieve victims' rights by introducing a product liability system that takes responsibility for damages caused by defects of products in accordance with the principle of negligence by the manufacturer. It contributes to the stability of people's life and sound development of the national economy, and to raise awareness of the safety of the product to promote the competitiveness of companies. If the durability is low inside or outside, there is a problem that a dangerous accident such as a car or a human accident can occur.

In addition, the domestic market of tension bearings loses price competitiveness by assembling and repairing tension bearings at a high price due to the monopoly of imported parts. As a result, there is a real problem that better automobile parts are not being developed.

In the case of conventional tension bearings, the diameter of the rollers is small and only one row of rollers are used. Therefore, the tension bearings need to be replaced with only a slight wear. This causes noise and fuel consumption, and shortens the life of the belt. Due to the monopoly of the importer, there is a problem in that the cost of replacing and repairing the tension bearing is high.

The present invention has been made to provide a further improved tension bearing to solve the above problems and to solve the problems of the prior art, the belt support screw thread is integrally formed on the outer peripheral surface, the shaft body inside A coupling hole is formed, and a cage having an annular space is formed between the inner surface of the pulley and the shaft body, and a pulley formed by including roller bearing mounting grooves at both ends of the shaft body coupling hole. In addition, a shaft having a plurality of rollers accommodated in the cage and a plurality of springs accommodated in the cage and supporting the plurality of rollers, the shaft is rotatable with respect to the pulley, and disposed in the radial direction concentrically in the pulley The main body is loaded inside the pulley, and the roller bearings are disposed axially in an annular space formed between the pulleys and the shaft main body at both end portions of the shaft body coupling hole, and seated against both side ends of the plurality of rollers. It is an object of the present invention to provide a tension bearing formed by including a washer.

Another object of the present invention is that the Product Liability Act, which is currently in force, introduces a product liability system that allows a product to be liable for damages in accordance with the principle of no fault liability, such as a manufacturer, for life, physical or property damages due to defects in the product. In order to promote the remedy of victims' rights, contribute to the stability of national life and sound development of the national economy, and to raise the awareness of the safety of products, the company's competitiveness will be improved. If the durability is low inside or outside parts due to defects after maintenance, there is a problem that a dangerous accident such as a car or a human accident can occur, so it can be appropriately responded to the product liability law and provides a tension bearing with high profitability and durability. I want to do that.

Still another object of the present invention is that the conventional tension bearings have a small diameter and use only one row of rollers, so that the tension bearings need to be replaced with only a little wear, and thus include two rows of clutches and washers. The purpose is to provide a tension bearing.

The above and other objects of the present invention, the belt support screw thread 17 is integrally formed on the outer circumferential surface, the shaft body coupling hole 18 is formed on the inner side, and between the inner surface of the pulley 10 and the shaft body 20. A cage 12 having an annular space therein is provided, and a pulley 10 including roller bearing mounting grooves 16 is formed at both ends of the shaft body coupling hole 18. In addition, a plurality of rollers 60 accommodated in the cage 12 and a plurality of springs 50 accommodated in the cage 12 and supporting the plurality of rollers 60, the pulley 10 Rotatable, the shaft main body 20 which is disposed in the radial direction concentric radially inside the pulley 10 is loaded to the inner side of the pulley 10, the pulleys at both ends of the shaft body coupling hole 18 ( 10) and a washer ring 40 for seating the roller bearing 30 disposed in the axial direction in the annular space formed between the shaft body 20 and against the opposite sides of the plurality of rollers 60, It is achieved by the formed tension bearing (1).

Tension bearing of the present invention is advantageous in terms of economics by shortening the working time during manufacturing and maintenance, easy maintenance, improve the profitability by simplifying the shape of the component and easy assembly.

Therefore, the tension bearing with improved profitability by simplifying the shape of the component and facilitating the assembly can shorten the working time during maintenance, which is easy to maintain and improves profitability, thereby giving an advantage in productivity and price competitiveness. .

In addition, the tension bearing is an essential element for power transmission of the engine belt system, and it acts as the initial tension of the belt and prevents the trembling. The two-row clutch significantly improves this effect, and increases the manufacturing cost due to the increased durability and profitability. By lowering the price of the tension bearing, the price of the tension bearing can be lowered due to the monopoly of imported parts, thereby achieving a price competitiveness. This will be the driving force for the development of better auto parts.

The diameter of the roller is initially configured to be positioned in the center of the cage, and as the roller wears, the roller moves to a narrow side of the wedge-shaped space of the cage by the support of the spring, thereby tensioning This has the effect of extending the service life of the bearings, which leads to an advantage in price competitiveness.

1 is an exploded perspective view showing a tension bearing according to the present invention.

2 to 3 are longitudinal and cross-sectional views showing a tension bearing according to the present invention.

Figure 4 is a plan view showing a pulley of the tension bearing according to the present invention.

Explanation of symbols on the main parts of the drawings

1: tension bearing 10: pulley 11: clutch

12: cage 13: roller support jaw 14: roller support surface

15: spring support projection 16: roller bearing 16-1: roller bearing first mounting groove

16-2: Roller bearing second mounting groove 17: Belt support thread

18: Shaft main body coupling hole 19-1: Roller bearing first seating surface

19-2: roller bearing second seating surface 20: shaft body

21: first roller bearing contact surface 22: second roller bearing contact surface

23: clutch surface 24: shaft shaft coupling hole 25: coupling screw thread

26 shaft coupling value 30 roller bearing 31 first roller bearing

32: second roller bearing 40: washer

41: washer shaft shaft coupling hole 42: roller support jaw coupling surface

43: spring support protrusion coupling groove 44: roller support surface coupling protrusion

45: first washer 46: second washer 47: third washer

50: spring 60: roller 61: first roller

62: second roller 70: pulley inner jaw

The above and other objects and features of the present invention will be more clearly understood by the following detailed description based on the accompanying drawings.

1 to 4 are shown an embodiment of the tension bearing according to the present invention, Figure 1 is an exploded perspective view showing a tension bearing according to the present invention, Figures 2 to 3 is a tension bearing according to the present invention Figure 4 is a longitudinal cross-sectional view and a cross-sectional view is a plan view showing a pulley of the tension bearing according to the present invention.

Referring to the tension bearing 1, reference numeral 10 denotes a pulley. Reference numeral 20 denotes a shaft body arranged concentrically to be rotatable relative to the pulley. Reference numeral 11 denotes a clutch described in the annular space between the pulley and the shaft body.

Reference numerals

30, 31 and 32 denote roller bearings disposed on both axial sides of the clutch in the annular space, respectively. The belt support screw thread 17 formed on the outer circumference of the pulley 10 is accompanied by a belt (not shown). Also, the concentric means the same or the like.

The tension bearing 1 of the present invention integrally forms the belt support screw thread 17 on the outer circumferential surface, and forms a shaft body coupling hole 18 therein, between the inner surface of the pulley 10 and the shaft body 20. A cage 12 having an annular space is provided, and a pulley 10 including roller bearing mounting grooves 16 is formed at both ends of the shaft body coupling hole 18. In addition, a plurality of rollers 60 accommodated in the cage 12 and a plurality of springs 50 accommodated in the cage 12 and supporting the plurality of rollers 60, the pulley 10 Rotatable, the shaft main body 20 which is disposed in the radial direction concentric radially inside the pulley 10 is loaded to the inner side of the pulley 10, the pulleys at both ends of the shaft body coupling hole 18 ( 10) and a washer ring 40 for seating the roller bearing 30 disposed in the axial direction in the annular space formed between the shaft body 20 and against the opposite sides of the plurality of rollers 60, Form.

In more detail, the clutch 11 is constituted by the cage 12 and the roller 60 and the spring 50 accommodated in the cage 12, and the roller bearing mounting groove 16 of the pulley 10 is The roller bearing is divided into a roller bearing first mounting groove 16-1 on which the first roller bearing 31 is seated and a roller bearing second mounting groove 16-2 on which the second roller bearing 32 is seated. 30 is also divided into a first roller bearing 31 and a second roller bearing according to the position to be mounted to the pulley 10, the washer ring 40 is the first washer (according to the position seated on the pulley 10) 45), the second washer 46 and the third washer 47.

The clutch 11 includes a plurality of rollers 60 accommodated in the cage 12, each roller 60 of the outer peripheral surface of the shaft body 20 and the pulley 10 by the spring (50) The wedge-shaped narrow side between the inner circumferential surfaces, that is, the roller support surface 14 is pressed in the direction.

The roller bearing 16 is a bearing in which several rollers are inserted between the rotating shaft and the bearing, and is a simple shape bearing in which linear rollers and tracks are in line contact. Therefore, the roller bearing 16 has a high load capacity and loads a radial load. However, sometimes other types of bearings can be substituted.

Since the roller 60 is formed in two rows of the first roller 61 and the second roller 62, even if the first roller 61 is damaged or worn out, it may not function properly. Since the second roller 62 plays the role of a roller, it extends the service life of the tension bearing 1, increases durability and is formed in two rows to distribute the load received by the roller 60 in the tension bearing 1.

The cage 12 of the pulley 10 is provided with a roller support jaw 13 to prevent the spring 50 from being separated by the rotation of the roller 60, the roller 60 is external when the non-rotation A roller support surface 14 is formed to prevent separation from the roller, and a spring support protrusion 15 supporting the spring 50 is formed. In more detail, the spring 50 is supported by the spring support protrusion 15 so that the roller 60 is wedge type between the outer circumferential surface of the shaft body 20 and the inner circumferential surface of the pulley 10 by the spring 50. It is provided with a roller supporting surface 14 so as to press in the direction of the wedge-shaped narrow side, that is, the roller supporting surface 14, and to prevent the roller 60 from being separated by the spring 50. The roller supporting jaw 13 of 12 has a roller when the roller 60 presses the spring 50 in the direction of the wedge-shaped wide side, that is, the spring 50 when the pulley 10 rotates. By limiting the movement distance of the 60, the spring 50 is prevented from coming off.

In addition, when the angle formed by the spring support protrusion 15 and the roller support jaw 13 is a as shown in the accompanying drawing 3, the angle formed by a is 80 to 89 ° so that the spring 50 is formed by the roller ( 60) while supporting it, do not break away.

The washer ring 40 is formed with a washer shaft shaft coupling hole 41 in the inner side for coupling with the shaft body 20, the roller support jaw engaging surface formed on the roller support jaw 13 and formed on the outside ( 42) It is provided with, the spring support projection (15) and the spring support projection engaging groove 43 formed on the outer side, the roller support surface engaging projection 44 formed on the roller support surface 14 is formed on the outside To form, including.

In more detail, each component of the washer ring 40 is loaded in close contact with the roller support jaw 13, the roller support surface 14 and the spring support protrusion 15, which are components of the cage 12. The first washer 41 and the third washer 43 prevent the roller 60 and the spring 50 from being separated, and in the case of the second washer 42 The first roller 61 and the second roller 62 is to distinguish the two rows of clutch 11 by distinguishing the position, the washer ring 40 is to prevent leakage of lubricant in the tension bearing (1) To prevent foreign substances from entering the interior.

1 and 4, the shaft main body 20 has a first roller bearing contact surface 21 contacting the first roller bearing 61 on one side upper end on an outer circumferential surface thereof, and one side lower end on an outer circumferential surface thereof. And a second roller bearing contact surface 22 in contact with the second roller bearing 62, and having a clutch surface 23 integrally formed at a central portion of the outer circumferential surface thereof, and having an inner shaft shaft coupling hole 24 formed therein. And a coupling screw thread 25 and a shaft shaft coupling value 26 formed at one lower end of the inner circumferential surface thereof.

In more detail, the first roller bearing contact surface 21 and the second roller bearing contact surface 22 are provided at both ends of the outer circumferential surface to support the first roller bearing 61 and the second roller bearing 62. The cage 12 forms an annular space between the inner surface of the pulley 10 and the shaft body 20, that is, by the clutch surface 23. In addition, the shaft shaft (not shown) in the coupling screw thread 25 is rotated and engaged in the same manner as the screw and bolt coupling. In addition, the shaft shaft coupling value 26 formed in the upper end of the inner side of the shaft body, a triangular protrusion having a groove therein, transmits accurate rotational inertia force to the shaft body 20 in addition to the firm coupling with the shaft shaft. .

The operation of the tension bearing 1 will be described below. If the rotational speed of the pulley 10 is relatively faster than the rotational speed of the shaft body, the roller 60 of the clutch 11 rolls to the narrow side of the wedge-shaped space. Thus, the tension bearing 1 is moved in a locked state, in which the pulley 10 is integrated with the shaft body 20 via the roller 60 so that they rotate synchronously.

When the rotational speed of the pulley 10 is relatively slower than the rotational speed of the shaft body 20, the roller 60 of the clutch 11 rolls to the wide side of the wedge-shaped space, and thus the tension bearing 1 is in a free state. In this state, the transmission of rotational power from the pulley 10 to the shaft body 20 is interrupted, and the shaft body 20 continues to rotate only by the rotational inertia force.

In addition, the size of the diameter of the roller 60 at the time of non-operation is configured to be initially located in the center portion of the cage 12, and as the wear of the roller 60 proceeds, the roller 60 is a spring (50) By the support of the cage 12 is moved to the narrow side of the wedge-shaped space is located, thereby bringing the effect of increasing the service life of the tension bearing (1).

In addition, by providing a pulley inner jaw (70) on one side of the inner surface of the pulley 10, even if the third washer 43 is removed, the tension to perform the role of the third washer (43) The same effect as that of the bearing 1 can be obtained.

Configurations shown in the embodiments and drawings described herein are only preferred embodiments of the present invention, and do not represent all of the technical spirit of the present invention, and various equivalents that may be substituted for them at the time of the present application and It should be understood that there may be variations.

Therefore, although the present invention has been described in detail with reference to the specific embodiments described, it will be apparent to those skilled in the art that various modifications and changes can be made within the scope of the technical idea of the present invention, and such modifications and modifications belong to the appended claims. It is natural.

Claims

A belt supporting screw thread is integrally formed on the outer circumferential surface, the shaft body coupling hole is formed on the inner side, and a cage having an annular space is formed between the inner surface of the pulley and the shaft body, and rollers are provided at both ends of the shaft body coupling hole. A pulley including a bearing mounting groove;

A plurality of rollers accommodated in the cage;

A plurality of springs supporting the plurality of rollers accommodated in the cage;

A shaft body rotatable with respect to the pulley and disposed radially concentrically inside the pulley;

First and second roller bearings disposed axially in an annular space formed between the pulleys and the shaft bodies at both ends of the shaft body coupling hole; And

It is formed, including; washer ring seated against both ends of the plurality of rollers;

The cage has a roller support jaw to prevent the spring is separated by the rotation of the roller; A roller supporting surface which prevents the roller from being separated to the outside during the non-rotation; And a spring support protrusion for supporting the spring.
The method of claim 1, wherein the roller

Tension bearing characterized in that formed in two rows of the first roller and the second roller.
The tension bearing according to claim 1, wherein an angle formed by the spring support protrusion and the roller support jaw is 80 to 89 °.
The method of claim 1 wherein the washer is

Washing shaft main body coupling hole provided on the inside for engaging with the shaft body;

A roller support jaw engaging surface seated on the roller support jaw and formed at an outer side thereof;

A spring support protrusion coupling groove coupled to the spring support protrusion and formed at an outside thereof;

Tension bearing characterized in that formed on the roller support surface, the roller support surface engaging projection formed on the outside.
The method of claim 1, wherein the shaft body

A first roller bearing contact surface in contact with the first roller bearing at an upper end on an outer circumferential surface thereof;

A second roller bearing contact surface in contact with the second roller bearing at one lower end of the outer circumferential surface;

A clutch surface formed integrally with the center portion of the outer circumferential surface;

A shaft shaft coupling hole formed inside;

A coupling screw thread formed at one lower end of the inner circumferential surface;

Tension bearing, characterized in that formed; including; shaft shaft coupling value in the form of a triangular projection formed on one side upper end of the inner circumferential surface.