KR100582873B1 - Damping shoe of tensioner for vehicle and method of manufacturing for shoe-body - Google Patents

Abstract

The present invention relates to a damping shoe fixedly supporting one end of a spring in a vehicle tensioner, and a method of manufacturing a shoe body constituting the damping shoe.

The damping shoe of the vehicle tensioner according to the present invention has a configuration including a shoe body 60 for holding and supporting one end of a spring provided in the vehicle tensioner, and a shoe cover 70 surrounding the outer surface of the shoe body 60. Has; On the contact surface of the shoe body 60 and the shoe cover 70, irregularities of shapes corresponding to each other are formed. On the other hand, the shoe body manufacturing method according to the present invention, cutting step (S100), upsetting (Upsetting), annealing step (S120) for cutting the material, and pre-treatment step (S130, S160) to form a film on the surface of the material ), A restraining step (S140) of pressurizing the material to have a predetermined outer diameter and thickness, a piercing step (S150) of forming a hole in the center of the material, and forging a product of a predetermined shape. Step S170, a turning step of turning the outer surface of the product (S180), a cutting step (S190) of cutting the product in half, and a shot (Shot) step of removing the foreign matter attached to the product (S200) and the like. According to the present invention, there is an advantage that the sliding of the shoe body and the shoe cover is prevented and the production efficiency is improved.

Tensioner, Damping shoe, shoe body, forging

Description

DAMPING SHOE OF TENSIONER FOR VEHICLE AND METHOD OF MANUFACTURING FOR SHOE-BODY}

1 is a perspective view showing a state in which a cam shaft of a general automotive engine is driven by a belt connection driving device.

Figure 2 is a cross-sectional view showing a general configuration of a vehicle tensioner according to the prior art.

Figure 3 is an exploded perspective view of the damping shoe constituting the vehicle tensioner according to the prior art.

Figure 4 is a perspective view showing the configuration of a preferred embodiment of the vehicle tensioner damping shoe according to the present invention.

5 is an exploded perspective view of the damping shoe illustrated in FIG. 4.

Figure 6 is an exploded perspective view of another embodiment of a vehicle tensioner damping shoe according to the present invention.

7 is a bottom perspective view of the damping shoe body shown in FIG. 6.

Figure 8 is a block process showing the manufacturing process of the shoe body constituting the vehicle tensioner damping shoe according to the present invention.

9 is a plan view showing a state of the product formed by the forging step of the process shown in FIG.

Explanation of symbols on the main parts of the drawings

50. Damping shoe 60. Shoo body

60 '. Side 60'a. Convex

60 ". Bottom 60" a. Recess

62. Spring Fixing 64.

70. Shoe cover 70 '. edge

70'a. Cover recess 70 ". Bottom

70 "a. Cover protrusion 72. Fixing protrusion

S100. Cutting step S110. Upsetting stage

S120. Annealing step S130. First pretreatment step

S140. Restraint step S150. Piercing Step

S160. Second pretreatment step S170. Forging

S172. First forging process S174. Pretreatment Process

S176. Secondary forging process S180. Turning step

S190. Cutting step S200. Short stage

The present invention relates to a vehicle tensioner, and more particularly, to a damping shoe fixedly supporting one end of a spring in a vehicle tensioner, and a manufacturing method of a shoe body constituting the damping shoe.

In general, in automobiles, auxiliary devices such as camshafts, alternators, power steering pumps, and air-con compressors are driven by connecting belts to engine crankshafts. At this time, it is common to provide a tensioner for adjusting the tension of the belt.

1 shows a camshaft of a typical automotive engine 10 by means of a belt drive.

The state which drives the track 11 is shown.

As shown, two camshaft pulleys 13 are connected to the crankshaft pulley 12 by a belt 14 so that the camshaft pulley 13 rotates according to the rotation of the crankshaft pulley 12. At this time, a tensioner 15 for adjusting the tension of the belt 14 is installed in the cylinder block (not shown), the tensioner 15 is usually configured to automatically adjust the tension.

The tensioner 15 is to keep the tension of the belt 14 constant while entering and exiting in the transverse direction according to the magnitude of the tension of the belt 14.

2 shows a cross section of the tensioner 15.

As shown therein, the pulley 16 which rotates in contact with the belt 14, the arm 18 which is fastened by the bolt 17 to the pulley 16, and one end of the arm 18 are predetermined. A base 19 fixed to the cylinder block of the engine by being inserted to have a clearance, a spring 20 having one end engaged with the arm 18 and the base 19, and a lower side of the spring 20; The support member 22 is provided, and one end of the spring 20 is fitted and fixed, and made of a damping shoe 24 or the like seated on the support member 22.

3 shows an exploded perspective view of the damping shoe 24.

As shown in the drawing, the damping shoe 24 is composed of a shoe body 25 made of metal and a shoe cover 26 surrounding the shoe body 25.

The shoe body 25 is a portion to which one end of the spring 20 is fitted and fixed, and a spring fixing part 25 ′ is formed at the center portion. And the shoe cover 26 is attached to the outside of the shoe body 25 to surround the shoe body 25.

The shoe body 25 is manufactured by sintering a metal material. Sintering refers to the solidified adhesion and solidification of the powder formed by press molding the powder into an appropriate shape. After heating to a temperature close to the melting point of the material, the powder is bonded to each other, or a part is deposited to be connected to each other to form a metal product.

The shoe cover 26 is made of a plastic material so that the shoe body 25 does not directly contact the base 19 of a metal material, and the like. The shoe body 26 surrounds the bottom and side surfaces of the shoe body 25. 25).

However, the damping shoe 24 used in the conventional tensioner 15 as described above has the following problems.

The damping shoe 24 is composed of a shoe body 25 and a shoe cover 26, and the shoe body 25 and the shoe cover 26 are attached by an adhesive. However, the tensioner 15 has a problem in that the temperature of the damping shoe 24 increases as the engine is operated. In this case, the shoe main body 25 and the shoe cover 26 are separated from each other and slide.

In addition, since the shoe body 25 of the damping shoe 24 is manufactured by sintering, there is a problem in that the ductility is low and easily broken.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide a damping shoe of a vehicle tensioner having irregularities corresponding to each other in the shoe body and the shoe cover.

Another object of the present invention is to provide a method for producing a shoe body in which two products are simultaneously produced by forging molding.

The damping shoe of the vehicle tensioner according to the present invention for achieving the above object has a configuration including a shoe body for fixing and supporting one end of the spring provided in the vehicle tensioner, and a shoe cover surrounding the outer surface of the shoe body. Has; The contact surface of the shoe body and the shoe cover is characterized in that the irregularities are formed corresponding to each other.

The unevenness is characterized by embossing.

A side surface of the shoe body is formed with a plurality of convex parts protruding outward, the bottom surface of the shoe body is characterized in that a plurality of recesses recessed inward.

The shoe cover is characterized in that the cover concave portion and the cover convex portion corresponding to the convex portion and the concave portion of the shoe body are formed, respectively.

In addition, the shoe body manufacturing method of the damping shoe according to the present invention, the cutting step of cutting the material to a predetermined length; An upsetting step of pressing the material cut in the cutting step so as to have a predetermined outer diameter; An annealing step of annealing the material that has undergone the upsetting step; A first pretreatment step of forming a film on the surface of the material subjected to the annealing step; A restraining step of pressurizing the material that has passed through the first pretreatment step to have a predetermined outer diameter and thickness; A piercing step of forming a hole in the center of the material which has undergone the restraining step; A second pretreatment step of forming a film on the material which has undergone the piercing step; Forging step (S170) for forging the product of a predetermined shape by pressing the material passed through the second pre-treatment step; A turning processing step of turning the outer surface of the product which has undergone the forging step; A cutting step of cutting the product which has been subjected to the turning step in half; It characterized in that it comprises a shot (Shot) step of removing the foreign matter attached to the product that went through the cutting (Cutting) step.

The forging step may include a first forging step of forming a product having a predetermined shape by pressing a material that has passed through the second pretreatment step; A pretreatment process of forming a film on the product which has undergone the first forging process; It characterized in that it has a configuration including a secondary forging process to form a final shape by pressing the product passed through the pretreatment process.

According to the present invention having such a configuration, the method of manufacturing the damping shoe and the shoe body of the vehicle tensioner has the advantage that the sliding of the shoe body and the shoe cover is prevented and the damping shoe performance and production efficiency are improved.

4 is a perspective view of a damping shoe of a vehicle tensioner according to the present invention, Figure 5 is an exploded perspective view of the damping shoe according to the present invention.

As shown in the drawing, the damping shoe 50 is composed of a shoe body 60 having a semicircular shape and a shoe cover 70 having a shape corresponding to the shoe body 60.

The shoe body 60 is fixed to support one end of the spring (not shown) provided in the vehicle tensioner (not shown), the spring fixing portion 62 is inserted into the center portion is fixed to the left and right.

The shoe cover 70 is made of a plastic material to surround the outer surface (side and bottom) of the shoe body 60, and is attached to the shoe body 60 by an adhesive or the like so that the shoe body 60 is made of metal. Avoid direct contact with other metal parts.

The shoe main body 60 and the shoe cover 70 are formed with irregularities corresponding to each other to prevent the shoe main body 60 and the shoe cover 70 from sliding.

That is, as shown in Figure 5, the inner surface of the shoe cover 70 is formed so that a plurality of fixing projections 72, the shoe body 60, the fixing projection 72 of the shoe cover 70 A projection receiving portion 64 is formed. Therefore, when the fixing protrusion 72 of the shoe cover 70 is accommodated in the protrusion receiving portion 64 of the shoe body 60, the shoe body 60 and the shoe cover 70 are prevented from sliding.

Meanwhile, the irregularities formed on the shoe main body 60 and the shoe cover 70 may be embossed, and another embodiment of such irregularities is illustrated in FIGS. 6 and 7.

FIG. 6 is an exploded perspective view of the shoe body 60 and the shoe cover 70 having irregularities of a shape different from that of FIG. 5, and FIG. 7 is a bottom perspective view of the shoe body 60 shown in FIG. 6. Is shown.

As shown in these figures, a plurality of convex portions 60'a protruding outward are formed on the side surface 60 'of the shoe body 60 at equal intervals, and the bottom surface of the shoe body 60 ( 60 ") are formed with a plurality of recesses 60 " a recessed inward (lower in Fig. 7) at equal intervals.

The shoe cover 70 includes a cover recess 70'a and a cover protrusion 70'a corresponding to the convex portion 60'a and the concave portion 60'a of the shoe body 60. Are each formed.

That is, the cover concave portion 70'a in which the convex portion 60'a formed on the side surface 60 'of the shoe body 60 is accommodated on the inner surface of the rim 70' of the shoe cover 70 is equally spaced apart. And a cover convex portion 70 "a which is formed at a bottom surface 70" of the shoe cover 70 and is accommodated in a recess 60 "a formed in the bottom surface 60 'of the shoe body 60. ) Are formed at equal intervals.

The shoe cover 70 is generally made of a plastic material and is manufactured by extrusion molding, and the shoe body 60 is made of a metal material such as iron (Fe) and manufactured by forging molding.

Forging refers to the operation of making a solid metal material into a certain shape by hammering or pressing a metallic material with a hammer. In the case of a material having a high melting point, the temperature may be at room temperature. It is often necessary to heat up somewhat.

In general, forging at a temperature higher than the temperature at which recrystallization proceeds in the material is called hot forging, and forging at a lower temperature is called cold forging. Cold forging, which is processed at a low temperature warm and room temperature rather than hot forging, can achieve high precision, but requires surface lubrication.

In order to make the structure of the solid material uniform and to reduce the size of the crystal grains in the crystal solid, hammering operation is called annealing, and it is gradually pressed with a tool without hammering to give a predetermined shape. The work of making a mold is called a press.

And the working method is ① between the flat tool, freely forging to make the product of the desired shape by turning or changing the position properly, and ② between the mold and the revolving mold in a certain shape. There are two types of forgings that make a product of the desired shape by inserting the material into the material.

Hereinafter, a process of forging the shoe body 60 will be described with reference to FIG. 8.

As shown, first cutting step (S100) of cutting the material to a predetermined length is performed. In the cutting step (S100) to cut the round bar of approximately 25mm in diameter (Φ) to the size of about 31.2mm.

Then, an upsetting step S110 is performed, and in this upsetting step S110, a material cut to a predetermined size in the cutting step S100 is pressed to form a predetermined outer diameter. That is to press the material cut in the cutting step (S100) to increase the diameter.

An annealing step S120 is followed by an upsetting step S110.

Annealing, also called annealing or annealing, refers to a treatment that is heated to a temperature that can be sufficiently diffused and then slowly cooled. In other words, it is a treatment method to make the material into the stable state as shown in the equilibrium diagram. The annealing step (S120) is carried out in the annealing furnace, it is preferable to ensure that the hardness (HRC) of the material is 65 or less.

After the annealing step S120 is performed, a first pretreatment step S130 is performed. Pre-treatment is the coating of the surface to facilitate the press work of the material. As is commonly known, short (about 20 minutes)-> degreasing (about 5 minutes)-> water washing (about 2 minutes)-> coating ( It takes about 15 minutes)-> water washing (about 2 minutes)-> neutralization (about 3 minutes)-> Bonde (lubrication; about 5 minutes).

The pretreatment as described above is performed in advance to generate a metal lubricating film, for example, a mixed film of zinc phosphate and metal soap, on the surface of the material in order to increase the lubricity of the material during material processing and to prevent seizure with the mold.

After the first pretreatment step (S130) is completed, the restraining step (S140) is carried out, in this case by pressing the material using a press (about 400 TON RPESS) diameter (Φ) of 47.5mm and thickness of about 8.5mm To be

After the restraining step S140, the piercing step S150 is followed. This step is performed by a press of about 110 tons and forms a hole of diameter 26.3 mm in the center of the material. Therefore, the material that passed through the piercing step (S150) has a circular ring shape.

The material which has undergone the piercing step (S150) is subjected to a film treatment again. That is, the second preprocessing step S160 is performed, and the second preprocessing step S160 is performed by the same method as the first preprocessing step S130 described above. In this case, however, the required time between the processes does not necessarily coincide with the required time of the first pretreatment step S130. That is, the time required for each detailed process may be added or subtracted.

The forging step S170 is followed by the second pretreatment step S160. The forging step (S170) is a step of completing a product having a predetermined shape by pressing the material using a press (Press), the shape of the product formed by the forging step (S170) is shown in plan view in FIG. have.

The forging step S170 may be completed by one press press, or may be completed by several press press processes. That is, the forging step (S170), and the first forging process (S172) for molding a product having a predetermined shape by pressing the material passed through the second pretreatment step (S160). It is also made of a pre-treatment process (S174) for forming a film on the product subjected to the first forging process (S172), and a second forging process (S176) for forming a final shape by pressing the product through the pretreatment process (S174). do.

After the forging step (S170) is carried out, the turning step (S180) proceeds. The turning step (S180) is made by the Anneal (N.C) lathe, and precisely processes the bottom and top of the product passed through the forging step (S170) to meet the specifications.

The turning step (S180) is followed by a cutting step (Sutting) (S190), this cutting (Sutting) step (S190) is made by milling or turning or pressing (Press). The cutting (Sutting) step (S190) is a process of cutting the material as shown in Figure 9 through the forging step (S170) in half. That is, the product shown in Figure 9 is cut into A-A '. As described above, when one product undergoes a cutting step S190, two products are produced.

When the cutting step S190 is completed, the shot step S200 is performed. The shot (Shot) step (S200) is made in a shot machine, is a process of removing the foreign matter attached to the product (shu body) that went through the cutting (Sutting) step (S190). That is to shorten the shoe body 60 made forged molding (shot) to facilitate the adhesion with the shoe cover (70).

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

As described above, according to the present invention, the damper of the tensioner is composed of a shoe body and a shoe cover, and the shoe body and the shoe cover have irregularities corresponding to each other. Therefore, even when the engine operation continues and the tensioner damping shoe temperature rises, the shoe body and the shoe cover are prevented from sliding apart from each other.

On the other hand, since the shoe body of the damping shoe according to the present invention is manufactured by forging molding, the ductility is relatively improved as compared with the case produced by sintering as in the prior art. Therefore, there is an advantage that does not break even in the external impact.

In addition, in the present invention, two shoe bodies are manufactured at the same time. That is, a circular ring-shaped product in which two shoe bodies are formed is manufactured by forging molding, and two shoe bodies are simultaneously manufactured by cutting such products. Therefore, the work efficiency is improved.

Claims (6)

delete Shoe body 60 for holding and supporting one end of the spring provided in the vehicle tensioner, It has a configuration including a shoe cover (70) surrounding the outer surface of the shoe body (60); The shoe body 60 and the shoe cover 70 is formed on the contact surface corresponding to each other irregularities (凹凸) is formed, the irregularities (담) of the vehicle tensioner damping shoe characterized in that the embossing (embossing). Shoe body 60 for holding and supporting one end of the spring provided in the vehicle tensioner, It has a configuration including a shoe cover (70) surrounding the outer surface of the shoe body (60); The surface of the shoe body 60 and the shoe cover 70 is formed with a concave-convex shape corresponding to each other, and a plurality of convex portions protruding outward from the side surface 60 'of the shoe body 60 ( 60'a), and the bottom surface 60 ″ of the shoe body 60 includes a plurality of recesses 60 ″ a recessed inwardly. The cover concave portion 70'a and the cover convex portion of the shoe cover 70 corresponding to the convex portion 60'a and the concave portion 60'a of the shoe body 60 are formed. Damping shoe of a vehicle tensioner, characterized in that each (70 "a) is formed. Cutting step (S100) for cutting the material to a predetermined length; Upsetting step (S110) for pressing the material cut in the cutting step (S100) to form a predetermined outer diameter; An annealing step (S120) of annealing the material which has undergone the upsetting step (S110); A first pretreatment step (S130) of forming a film on the surface of the material which has undergone the annealing step (S120); Constraining step (S140) to press the material passed through the first pre-processing step (S130) to have a predetermined outer diameter and thickness; A piercing step (S150) for forming a hole in a central portion of the material which has undergone the restraining step (S140); A second pretreatment step (S160) of forming a film on the material which has undergone the piercing step (S150); Forging step (S170) for forging a product of a predetermined shape by pressing the material passed through the second pre-treatment step (S160); A turning step (S180) of turning the outer surface of the product which has undergone the forging step (S170); Cutting step (S190) for cutting the product roughly cut through the turning step (S180) in half; Shoe body manufacturing method characterized in that it comprises a short (Shot) step (S200) for removing the foreign matter attached to the product passed through the cutting (Sutting) step (S190). The method of claim 5, wherein the forging step (S170), A first forging process (S172) of forming a product having a predetermined shape by pressing the material having passed through the second pretreatment step (S160); A pretreatment step (S174) of forming a film on the product having undergone the first forging step (S172); Shoe body manufacturing method characterized in that it has a configuration including a secondary forging process (S176) to form a final shape by pressing the product passed through the pretreatment process (S174).

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