KR100397680B1 - boot of clamp intestine type for swaging - Google Patents

Abstract

The present invention relates to a boot installed in a universal joint of an automobile, and in particular, inserted into the outer peripheral surface of the boss portion of the boot fastened by being overlaid on the ball housing opening side of the joint, A swiveling clamp-integrated boot, characterized in that a plurality of protruding pins are formed to protrude to the outside in an annular shape and have a predetermined angular interval, and a swaging clamp having a cross section of the protruding pins is formed in a wave shape. By providing a fastening device for crimping the boot in which the swaging clamp is embedded to the material joint, it reduces interference with other parts, reduces the defective rate by single process of the assembly process, and clamping force with uniform tightening force. It has the effect of increasing.

Description

Boot of clamp intestine type for swaging

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boot installed in a universal joint of an automobile, and in particular, increases the frequency of safety accidents and delays in the assembly process due to the use of a metal seal clamp for fixing the boot. The present invention relates to a swaging clamp built-in boot configured to fasten a boot to a housing by embedding a clamp in a boot and compressing a clamp embedded in a swaging method.

In general, the drive shaft in the automobile is connected to the output shaft of the transmission to serve to transmit the rotational power transmitted from the engine to the drive wheel.

This drive shaft is installed so that the angle is changed according to the displacement of the wheel according to the driving state, that is, to be bent, so that the rotational power output from the transmission can be smoothly transmitted to the drive wheel, as well as the installation is free.

On the other hand, this type of joint is changed according to the type and arrangement of the driving wheel position, suspension system, steering system, etc. The type and number of installations are classified according to the formal classification. Because the effective radius is changed, it is divided into inconstant material joint, which becomes inconstant velocity, and constant joint, which can rotate at constant speed because the contact point of driving shaft and driven shaft is always located on the bisector line.

In addition, the classification route according to the arrangement is divided into a wheel-side material joint that can accommodate the steering angle by the steering system, and a transmission-side material joint that can absorb the maximum displacement amount due to the vertical movement of the suspension system.

Among the above-mentioned material joints, the constant velocity joints may include, for example, tripod joints, double offset joints, spherical joints, and double spider joints.

Meanwhile, among the constant velocity joints, tripod joints, double offset joints, and spherical joints are ball or rollers which achieve a slide displacement in the housing and in the housing for smooth bending displacement or axial displacement simultaneously with high speed driving. Lubricating oil is injected between the slide members such as the back, and the outer part of them is covered with a boot for preventing the inflow of foreign substances and preventing the lubricating oil from being lost to the outside.

Here, an example of the spherical material joint on the wheel side of the constant velocity material joint using the lubricating oil and the boot as described above is illustrated in FIGS. 1 and 2.

As shown in the accompanying drawings, an inner race having an axle-side drive shaft 210 to which rotational power is transmitted from the transmission to the central shaft hole 231 and having a plurality of arc-shaped ball contact surfaces 232 on the outer circumferential surface thereof (inner) a ball cage 240 having a rase 230, each ball 241 positioned outside the inner race 230 and in contact with each arc-shaped ball contact surface 232, and one side is open; And a ball housing 221 of a wheel side drive shaft 220 having a semicircular rail groove 222 in the axial direction such that the ball 241 of the ball cage 240 contacts the inner circumferential surface of the space. .

On the other hand, the corrugated boot 211 to prevent the foreign matter, such as dust into the ball housing 221 and at the same time to prevent the lubricant oil injected into the ball housing 221 to be lost to the outside of the ball housing 221 is covered by the open side, the one end of the corrugated boot 211 to the axle side drive shaft 210, the other end to the front end of the ball housing 221 for sealing in the ball housing 221 The seal clamps 212 and 213 are fixed. Grease is usually used as the lubricating oil.

The spherical material joint of the vehicle drive shaft configured as described above has an inner race 230 fastened to the axle side drive shaft 210 according to the displacement of the wheel according to the driving state, and its arc-shaped ball contact surface 232 and the ball cage 240. It is possible to give a bending change as the slide flows between the ball 241 and the arc-shaped rail groove 222 of the ball housing 221 is inserted into. At this time, the amount of bending displacement is about 47 °, the potential in the axial direction is not made, the arc of the contact surface 232 and the ball cage 240 of the rail groove 222 and the inner race 230 of the ball housing ( The oil film is formed by the injected lubricating oil in 241 to minimize the frictional force due to the slide between them.

By the way, in order for the corrugated boot 211 to perform its own role, fastening by the seal clamps 212 and 213 should be made very closely, that is, as shown in FIG. Since the clamp 212 is wound in a fixed position of the corrugated boot 211 and is compressed, there is a disadvantage in that a fastening time due to assembly of the corrugated boot 211 is prolonged at the time of production.

In addition, due to the nature of the metal material while performing a clamping process for the clamp, there is also a problem that a safety accident is frequently caused by the cut surface of the seal clamp 212.

Furthermore, in order to maintain the clamping state even though the clamping is performed through the clamping of the clamp 212, the extension member protruding laterally to one end of the clamp indicated by reference numeral 212 in FIG. It is only the method of pressing the other end, and in this way, there is a high probability that the loosening state of the fastening state will occur in the future, and accordingly, grease leakage will occur.

An object of the present invention for solving the problems of the prior art as described above is to provide a clamp on the boot in order to prevent the increase in the frequency of safety accidents caused by the use of a metal seal clamp for fixing the boot and to delay time in the assembly process. The present invention provides a swaging clamp-integrated boot for fastening the housing and boot by crimping a clamp that is built in and swaging.

Another object of the present invention is to provide a fastening mechanism for swaging a clamp embedded in a boot, when fastening the ball clamp using a boot having a proposed swaging clamp therein.

1 is an exploded perspective view showing a conventional automobile spherical joint and a conventional corrugated boot mounted thereto.

Figure 2 is a partial cutaway cross-sectional view showing a conventional automobile spherical joint and a conventional corrugated boot mounted thereto.

Figure 3 is a sectional view of the main portion showing a fastening state using a conventional clamp.

Figure 4 is a cross-sectional view showing a fastening state using a built-in swaging clamp boot according to the present invention.

5 is a plan view of the clamping swaging shown in FIG.

FIG. 6A is an enlarged view of a portion indicated by reference numeral A in the sectional view of the fastening state shown in FIG. 4; FIG.

Figure 6b is a diagram illustrating a situation seated in the groove formed on the outer peripheral surface of the ball housing through the jig.

Figure 6c is an illustration of a state swissed through the fastening mechanism.

Figure 7 is an illustration of a fastening mechanism for swaging.

Figure 8 is a cross-sectional view showing a fastening state using a built-in clamp for swaging according to another embodiment of the present invention.

9 is an illustration of a fastening mechanism for swaging according to another embodiment.

10A and 10B are plan views showing the state of the swaging clamp before and after deformation by the swaging fastening mechanism of FIG.

A feature of the present invention for achieving the above object is a boot structure having a stretchable fold on the circumference to prevent external loss of the lubricating oil injected over the opening of the material joint, the ball housing opening side of the material joint It is inserted in the outer peripheral surface of the clamp boss portion of the boot that is covered and fastened to, and is wound in an annular shape along the insertion surface and formed with a plurality of protruding pins protruding outwardly at regular angle intervals, the cross section of the protruding pins being waved Equipped with a swaging clamp having the shape of.

Another feature of the present invention for achieving the above object is inserted into the outer peripheral surface of the clamp boss portion of the boot is fastened by covering the groove of the opening of the material joint, is wound in an annular shape along the insertion surface, a constant angle Boots to prevent the external loss of the lubricating oil injected by covering the opening of the material joint by mounting a swaging clamp having a wave shape cross section of the plurality of protruding pins are formed to protrude to the outside at intervals In the fastening device for fixing to the groove,

A semicircular fixed seating table having a diameter equal to the diameter of the outer peripheral surface of the clamp boss portion, a pressing member having the same shape and size as the fixing seating table, and the pressing member are formed on the fixed seating board to form a circle. It includes a pressing means for applying a constant pressing force to the pressing member.

Another feature of the present invention for achieving the above object is in the boot structure having an elastic wrinkles on the circumference to prevent the external loss of the lubricating oil is injected over the opening of the material joint, the opening of the material joint It is inserted into the outer peripheral surface to the clamp boss portion of the boot that is overlaid and fastened to a specific position, but is equipped with a swaging clamp that is wound in an annular shape along the insertion surface.

Another feature of the present invention for achieving the above object is inserted into the outer peripheral surface of the clamp boss portion of the boot is fastened by covering the groove of the opening of the material joint, the swaging clamp is wound in an integral shape along the insertion surface In the fastening device for fixing the boot to the groove to prevent the external loss of the lubricating oil is injected to cover the opening of the material joint by mounting a,

A semicircular fixed seating table having a plurality of protrusions formed in a state in which the diameter is the same as the diameter of the outer peripheral surface of the clamp boss portion, and the inner peripheral surface has a constant angular spacing, and a crimping member having the same shape and size as the fixed seating table; And pressing means for dropping the pressing member on the fixed seating plate to form a circle, and applying a predetermined pressing force to the pressing member.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 4 is a cross-sectional view of a fastening state using a built-in swaging clamp boot according to the present invention, wherein the swaging clamp 212a is integrally annular along an outer circumferential surface at one end of the boot 211a fastened to the ball housing 221. 5, a plurality of protruding pins 214 are formed in a state having a constant angular interval as shown in FIG. 5, and a cross section of the protruding pins 214 has a wave shape. It is seated in the clamping position (hereinafter referred to as the groove 23) formed on the outer peripheral surface of the ball housing 221 through.

5A is an enlarged view of the portion indicated by reference numeral A in the cross-sectional view of the fastening state shown in FIG. 4, and is seated in the groove 223 formed on the outer circumferential surface of the ball housing 221 through the jig 215. 6B is a view illustrating a situation in which the situation is swissed through the fastening mechanism 300 illustrated in FIG. 7.

In FIG. 6A, the swaging clamp 212a maintains, for example, an angle α in a range of 10 to 45 °, due to the groove 223 formed on the outer circumferential surface of the ball housing 221 through the jig 215. ) Is to ensure that the process is settled smoothly.

Then, when the boot 211a is seated in the groove 223 as shown in FIG. 4 attached thereto, it is sweded by a fastening mechanism as shown in FIG. As shown, the swaging clamp 212a is compressed to allow the ball housing 221 and the boot 211a to be fastened.

That is, in the above-described embodiment, the molding method and the plasticity of the metal are used, and the metal inserted just inside the outer circumferential surface of the clamp boss portion formed at one end of the boot 211a is pulled and assembled onto the groove 223 through the jig. Once again, thorn-like protrusion pins 214 are compressed to increase the effect of damping.

At this time, briefly look at the configuration of the fastening mechanism 300 shown in Figure 7, a semi-circular fixed seat 301 of the same diameter as the diameter of the outer peripheral surface of the clamp boss portion, and the same shape as the fixed seat 301 Pressing means 303 having the same size as the pressing member 302 and the pressing member 302 on the fixed seating table 301 to form a circular shape to apply a constant pressing force to the pressing member 302 )

As an embodiment different from the above-described embodiment, the swaging clamp-embedded boot 411a shown in FIG. 8 is attached to the outer peripheral surface of the boss portion formed at one end of the boot 411a according to the molding method as shown. Insert the integral annular metal clamp 412a, pull it over the groove 223 through the jig 415, and assemble it, and then swage it by the fastening mechanism 400 shown in FIG. It is fastened to the ball housing 221.

At this time, the swaging clamp 412a (see FIG. 10A attached) inserted in the boss outer peripheral surface of the boot 411a by the method described with reference to FIGS. 8 and 9 is shown in FIG. As it is deformed in the shape that the indentation groove 414 is generated on the outer circumferential surface to increase the damping effect, for this purpose, the fastening mechanism 400 is shown in Figure 9, the above-mentioned fastening mechanism 300 and Similarly, it is composed of a fixed seat 401, the pressing member 402, the pressing means 403. Here, the fixed seat 401 is the diameter is the same as the diameter of the boss portion of the clamp 412a, a plurality of protrusions 405 are formed on the inner peripheral surface at regular angular intervals, the same shape as the fixed seat 401 And the pressing member 402 having a size also protrudes a plurality of protrusions 405 at regular angular intervals on the inner circumferential surface, and the pressing means 403 likewise presses the pressing member 402 against the fixed seat 401. It is supposed to play a role.

When providing a boot for clamping swaging clamp according to the present invention as described above, there is an effect of reducing the interference rate by reducing the interference with other components and a single process of the assembly process, while increasing the clamping force with a uniform tightening force. .

Claims (5)

In the boot structure having an elastic wrinkles on the circumference to prevent the external loss of the lubricating oil injected by covering the opening of the material joint, Is inserted into the outer peripheral surface of the boss portion of the boot (211a) that is covered with the ball housing 221 opening side of the material joint, is wound in an integral ring along the insertion surface, a plurality of protruding pins 214 having a predetermined angle interval ) Is formed so as to protrude to the outside, the swaging clamp embedded boot, characterized in that the cross section of the protruding pin (214) has a swaging clamp (212a) having a wave shape. The method of claim 1, The protruding pin 214 is swaging clamp embedded boot, characterized in that the floating angle (α) in the range of 10 to 45 °. It is inserted into the outer peripheral surface of the boss portion of the boot (211a) is covered with the groove 223 of the opening of the material joint, is wound in an integral shape along the insertion surface, a plurality of protruding pins 214 having a predetermined angle intervals A boot 211a which protrudes outwardly and mounts a swaging clamp 212a having a wave shape in cross section of the protruding pin 214 to cover the open portion of the joint to prevent external loss of lubricant. In the fastening device 300 for fixing the to the groove 223, A semicircular fixed seat 301 having a diameter equal to the diameter of the boss portion of the clamp 212a; A pressing member 302 having the same shape and size as the fixing seat 301; And Swaging device characterized in that it comprises a pressing means (303) to form a circular shape by pressing the pressing member (302) on the fixed seating table (301) to apply a constant pressing force to the pressing member (302). In the boot structure having a foldable stretch on the circumference and prevents external loss of the lubricating oil injected by being covered on the opening side of the ball housing 221 of the material joint, Inserted into the outer peripheral surface of the boss portion of the boot (211a) to be covered and fastened to the ball housing 221 opening side of the material joint, characterized in that the swaging clamp 412a is wound in an integral shape along the insertion surface Boots with built-in clamp for swaging. Inserted into the outer peripheral surface of the boss portion of the boot 411a, which is overlaid and fastened to the groove 223 of the opening of the material joint, and is fitted with a swaging clamp 412a wound in an annular shape along the insertion surface. In the fastening device 400 for fixing the boot 411a to the groove 223 to prevent the external loss of the lubricating oil which is overlaid on the housing opening side, A semi-circular fixing seat 401 having a plurality of protrusions 405 formed thereon with a diameter equal to the diameter of the boss portion of the clamp 412a and having a predetermined angular interval on an inner circumferential surface thereof; A pressing member 402 having the same shape and size as the fixed seat 401; And Swaging device, characterized in that the pressing member (402) on the fixed seating table (401) to form a circular shape to apply a predetermined pressing force to the pressing member (403).