JP2023091185A - Turning nozzle - Google Patents

Abstract

To provide a turning nozzle easy in turning of a nozzle and capable of holding an attitude of the nozzle after turning.SOLUTION: A turning nozzle 1 has a turning part 20 including a spherical part 23 forming a linear first through hole 21 passing through the sphere center, a main body part 10 having a second through hole 19 penetrating in the first direction D1, storing a spherical part in the second through hole and having an annular contact surface 14 contacting with a surface of the spherical part in a part in the first direction in an inner wall surface 22 of the second through hole and an elastic member 40 arranged in the second through hole in a compression state contractible in the first direction. The maximum diameter L2 of the spherical part becomes larger than the minimum diameter L1 of the contact surface. In the first direction, the elastic member is arranged on the opposite side of the contact surface when viewed from a part of the maximum diameter in the spherical part. The elastic member presses the spherical part directly or indirectly against the contact surface by resilience force generated by compression in the first direction.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to swivel nozzles.

Conventionally, there has been known a swivel nozzle that ejects fluid such as cutting oil, coolant, or air used for machining in any direction. A technique of this type is disclosed, for example, in Japanese Patent Application Laid-Open No. 2002-200012.

Patent Literature 1 discloses a coolant nozzle in which a nozzle unit and a valve unit are separably assembled. This nozzle unit includes a nozzle, a body that accommodates the spherical portion of the nozzle, and a spacer member that is arranged in the body so as to contact the spherical portion.

JP 2015-20214 A

In Patent Document 1, a large force is required to turn the nozzle to change the ejection direction of the fluid. On the other hand, it is also necessary to maintain the posture of the nozzle after the nozzle is turned. A conventional swivel nozzle has a problem in that it is difficult to achieve both ease of swiveling of the nozzle and maintenance of the nozzle posture.

An object of the present disclosure is to provide a swivel nozzle that facilitates swiveling of the nozzle and can maintain the posture of the nozzle after swiveling.

A swirl nozzle according to the present disclosure has a swirl portion including a spherical portion in which a linear first through hole passing through the center of the sphere is formed, and a second through hole penetrating in a first direction. a body portion that accommodates the spherical portion in the hole and has an annular contact surface that contacts the surface of the spherical portion on a part of the inner wall surface of the second through hole in the first direction; an elastic member arranged in the second through hole. The maximum diameter of the spherical portion is larger than the minimum diameter of the contact surface. In the first direction, the elastic member is arranged on the side opposite to the contact surface when viewed from the largest diameter portion of the spherical portion. The elastic member directly or indirectly presses the spherical portion against the contact surface by a restoring force generated by compression in the first direction.

Advantageous Effects of Invention According to the present disclosure, it is possible to provide a swivel nozzle that facilitates swiveling of the nozzle and can maintain the posture of the nozzle after swiveling.

FIG. 1 is a perspective view showing the overall configuration of a swirling nozzle according to Embodiment 1. FIG. FIG. 2 is a cross-sectional view of the swirl nozzle along line II-II in FIG. FIG. 3 is a cross-sectional view showing the configuration of a swirling nozzle according to Embodiment 2. FIG.

[Overview of embodiment]
A swirl nozzle according to the present disclosure has a swirl portion including a spherical portion in which a linear first through hole passing through the center of the sphere is formed, and a second through hole penetrating in a first direction. a body portion that accommodates the spherical portion in the hole and has an annular contact surface that contacts the surface of the spherical portion on a part of the inner wall surface of the second through hole in the first direction; an elastic member arranged in the second through hole. The maximum diameter of the spherical portion is larger than the minimum diameter of the contact surface. In the first direction, the elastic member is arranged on the side opposite to the contact surface when viewed from the largest diameter portion of the spherical portion. The elastic member directly or indirectly presses the spherical portion against the contact surface by a restoring force generated by compression in the first direction.

According to the swiveling nozzle, the spherical portion is rotated while pushing the spherical portion toward the elastic member so that the elastic member shrinks, thereby easily swiveling the nozzle attached to the spherical portion or the nozzle integrally formed with the spherical portion. can be made This makes it possible to easily change the direction in which the fluid is ejected from the nozzle. Moreover, after the nozzle is swung, the restoring force of the elastic member presses the spherical portion against the contact surface of the main body, so that the posture of the nozzle can be maintained. Therefore, according to the present disclosure, it is possible to provide a swivel nozzle that facilitates swiveling of the nozzle and can maintain the posture of the nozzle after swiveling.

The orbiting nozzle further comprises an annular member having an annular curved surface along the surface of the spherical portion and in contact with the surface of the spherical portion on its inner peripheral surface, and disposed between the spherical portion and the elastic member. good too. The elastic member may indirectly press the spherical portion against the contact surface via the annular member. According to this configuration, the spherical portion smoothly rotates along the inner peripheral surface (curved surface) of the annular member, so that the nozzle can be turned more easily.

In the swirl nozzle described above, the annular member may be made of an elastically deformable material. The annular member includes an annular spherical contact portion including the curved surface, and an annular extending portion connected to the spherical contact portion and extending radially inward from the spherical contact portion so as to overlap the spherical portion in the first direction. and may include According to this configuration, the extending portion is elastically deformed by the pressure of the fluid supplied into the main body, and the spherical portion can be sandwiched between the extending portion and the contact surface. As a result, even when a large amount of fluid is supplied and a large force is applied to the nozzle, the orientation of the nozzle can be more reliably maintained.

In the swivel nozzle described above, the elastic member may be a spring in which a plate-shaped wire having a square shape when viewed in the longitudinal direction is spirally wound. In a cross section along the first direction, the spring may have a shape in which the length in the second direction perpendicular to the first direction is greater than the length in the first direction. According to this configuration, since the restoring force of the elastic member is more reliably transmitted to the spherical portion in the first direction, it is possible to more easily maintain the posture of the nozzle.

In the swirl nozzle described above, the surface roughness of the contact surface may be greater than the surface roughness of the inner wall surface of the second through hole other than the contact surface. According to this configuration, the spherical portion is less likely to slide on the contact surface, so the posture of the nozzle can be more easily maintained.

[Specific example of embodiment]
Next, specific embodiments of the swirl nozzle of the present disclosure will be described with reference to the drawings. In the drawings below, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will not be repeated.

(Embodiment 1)
First, the configuration of a swirl nozzle 1 according to Embodiment 1 will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view showing the overall configuration of the swivel nozzle 1. FIG. FIG. 2 is a cross-sectional view of the swirl nozzle 1 along line II-II in FIG. As shown in FIG. 2 , the swirl nozzle 1 mainly includes a swirl portion 20 including a spherical portion 23 , a body portion 10 accommodating the spherical portion 23 , an elastic member 40 and an annular member 30 . These components are described in detail below.

As shown in FIG. 2, the spherical portion 23 is formed with a linear first through hole 21 passing through the center of the sphere. The first through hole 21 is a circular hole when viewed in the first direction D1 and is surrounded by the inner wall surface 22 . As shown in FIG. 2 , in the present embodiment, a portion including the end portion of the hollow cylindrical nozzle 50 is inserted into the first through hole 21 . The nozzle 50 can be inserted into and removed from the first through hole 21 of the spherical portion 23, and its outer peripheral surface is in contact with the inner wall surface 22 of the spherical portion 23 over the entire circumferential direction.

As shown in FIG. 2, the body portion 10 is formed with a second through hole 19 penetrating in the first direction D1. The spherical portion 23 is accommodated in the second through hole 19 . The inner wall surface surrounding the second through hole 19 includes a contact surface 14 , a first inner wall surface 15 , a second inner wall surface 16 and a third inner wall surface 17 . The first inner wall surface 15, the contact surface 14, the second inner wall surface 16, and the third inner wall surface 17 are arranged in this order in the first direction D1 from the upper side (the tip side of the nozzle 50) in FIG. . That is, the body portion 10 has the contact surface 14 on a portion of the inner wall surface of the second through hole 19 in the first direction D1. In the present embodiment, the surface roughness of the contact surface 14 is determined by the surfaces of the inner wall surfaces of the second through hole 19 other than the contact surface 14 (the first inner wall surface 15, the second inner wall surface 16 and the third inner wall surface 17). is larger than the surface roughness of, but not limited to. The "surface roughness" referred to here may be, for example, the arithmetic mean roughness Ra, but is not limited to this.

The contact surface 14 is an annular surface that contacts the surface (spherical surface) of the spherical portion 23 and surrounds the spherical portion 23 entirely in the circumferential direction. As shown in FIG. 2, contact surface 14 in the present embodiment is a curved surface along the surface of spherical portion 23 in a cross section along first direction D1. More specifically, the inner diameter of the contact surface 14 decreases from the second inner wall surface 16 side (lower side in FIG. 2) toward the first inner wall surface 15 side (upper side in FIG. 2). That is, the portion of the contact surface 14 with the minimum diameter L1 is the portion of the contact surface 14 that is closest to the first inner wall surface 15 . A maximum diameter L2 of the spherical portion 23 is larger than a minimum diameter L1 of the contact surface 14 . As shown in FIG. 2 , the spherical portion 23 is arranged such that the portion with the maximum diameter L2 is located closer to the elastic member 40 than the portion with the minimum diameter L1 of the contact surface 14 .

The first inner wall surface 15 forms a gap in the second direction D2 (the direction perpendicular to the first direction D1 in the cross section of FIG. 2) between the surface of the spherical portion 23 and the spherical portion 23 along the entire circumferential direction. It is a surrounding annular surface. More specifically, as shown in FIG. 2, the first inner wall surface 15 is a tapered surface that increases in diameter with distance from the contact surface 14 in a cross section along the first direction D1. Therefore, the annular gap between the surface of the spherical portion 23 and the first inner wall surface 15 widens in the second direction D2 as the distance from the contact surface 14 increases.

Like the first inner wall surface 15, the second inner wall surface 16 is an annular surface that has a gap in the second direction D2 with respect to the surface of the spherical portion 23 and surrounds the spherical portion 23 in the entire circumferential direction. . As shown in FIG. 2 , the second inner wall surface 16 has a tapered surface that increases in diameter with increasing distance from the contact surface 14 in a cross section along the first direction D1. The maximum diameter of the second inner wall surface 16 is smaller than the maximum diameter of the first inner wall surface 15, but is not limited to this. The second inner wall surface 16 is not limited to the tapered surface described above, and may be a surface extending in the first direction D1 in the cross section of FIG. 2, for example.

Similar to the first inner wall surface 15 and the second inner wall surface 16, the third inner wall surface 17 has a gap in the second direction D2 between itself and the surface of the spherical portion 23, and the spherical portion 23 extends over the entire circumferential direction. It is a surrounding annular surface. As shown in FIG. 2, the third inner wall surface 17 in the present embodiment is a surface extending in the first direction D1 in a cross section along the first direction D1. The third inner wall surface 17 is formed with an annular recessed groove 18 that is recessed outward in the second direction D2 (away from the annular member 30) in a cross section along the first direction D1. As shown in FIG. 2, the groove 18 is defined by a groove bottom surface extending in the first direction D1 and a groove wall surface extending in the second direction D2 and connected to the groove bottom surface in the cross section along the first direction D1. ing. The groove 18 is formed in the third inner wall surface 17 along the entire circumferential direction. Note that the groove 18 is not essential in the swirl nozzle of the present disclosure and may be omitted.

As shown in FIG. 2 , the body portion 10 includes an attachment portion 11 and a tightening portion 12 connected to an end portion of the attachment portion 11 in the first direction D1. The attachment portion 11 is a portion attached to a pipe (not shown) or the like for supplying fluid such as cutting oil, coolant, or air into the body portion 10 . The mounting portion 11 has a hollow cylindrical shape extending in the first direction D1, and has a second inner wall surface 16 and a third inner wall surface 17 on its inner peripheral surface. A threaded portion 13 is formed on the outer peripheral surface of the mounting portion 11 over the entire circumferential direction. On the other hand, a female thread (not shown) that meshes with the threaded portion 13 is formed on the inner peripheral surface of the end portion of the pipe.

The tightening portion 12 is a portion to be gripped by a hand, a tool, or the like when the swivel nozzle 1 is attached to the pipe or the like. As shown in FIG. 1, the tightening portion 12 in this embodiment has a hexagonal shape in plan view. As shown in FIG. 2, the tightening portion 12 has an outer diameter larger than that of the mounting portion 11, and has a contact surface 14 and a first inner wall surface 15 on its inner peripheral surface.

The elastic member 40 is arranged in the second through hole 19 in a compressed state capable of expanding and contracting in the first direction D1. As shown in FIG. 2, the elastic member 40 is arranged on the side opposite to the contact surface 14 when viewed from the portion of the spherical portion 23 having the maximum diameter L2 in the first direction D1. The elastic member 40 in this embodiment is a spring and is arranged in the groove 18 . In the present embodiment, the amount of compression of the elastic member 40 in the first direction D1 is smaller than the maximum amount of compression of the elastic member 40 in the first direction D1. The elastic member 40 indirectly presses the spherical portion 23 against the contact surface 14 via the annular member 30 by a restoring force generated by compression in the first direction D1. This restoring force acts upward in the first direction D1 in FIG.

The elastic member 40 in the present embodiment is a spring (wave spring) in which a plate-like wire rod having a quadrangular (rectangular) shape when viewed in the longitudinal direction is spirally wound. As shown in FIG. 2, the spring has a shape in which the length in the second direction D2 is longer than the length in the first direction D1 in a cross section along the first direction D1. Therefore, the plate surface of the spring contacts the annular member 30 , and the restoring force of the spring acts on the spherical portion 23 via the annular member 30 . It should be noted that other types of springs may be employed as the elastic member.

The annular member 30 is made of an elastically deformable material such as resin, and is arranged between the spherical portion 23 and the elastic member 40 (FIG. 2). As shown in FIG. 2, the annular member 30 has an annular curved surface 30A along the surface of the spherical portion 23 and in contact with the surface of the spherical portion 23 on its inner peripheral surface. 2, the curved surface 30A is continuous with the contact surface 14 and forms an arc with a constant curvature radius together with the contact surface 14. Annular member 30 in the present embodiment includes annular spherical contact portion 32 including curved surface 30A and annular extending portion 31 connected to the lower portion of spherical contact portion 32 . As shown in FIG. 2, the extending portion 31 extends inward in the radial direction (second direction D2) from the lower portion of the spherical contact portion 32 so as to overlap the spherical portion 23 in the first direction D1. The annular member 30 is arranged in contact with the second inner wall surface 16 and the third inner wall surface 17 .

In a state where fluid is not supplied into the body portion 10, the extension portion 31 has a gap with the surface of the spherical portion 23 (FIG. 2). On the other hand, when a high flow rate of fluid is supplied into the body portion 10 from the pipe (not shown), the extension portion 31 is elastically deformed toward the spherical portion 23 due to the pressure of the fluid. As a result, the spherical portion 23 is sandwiched between the body portion 10 (contact surface 14) and the annular member 30 (extending portion 31), and the attitude of the nozzle 50 is stabilized.

As described above, according to the swivel nozzle 1 according to the present embodiment, the spherical portion 23 is rotated in the main body portion 10 while pushing the spherical portion 23 toward the elastic member 40 so that the elastic member 40 contracts in the first direction D1. The nozzle 50 can be easily swiveled by turning it. This makes it possible to easily change the direction in which the fluid is ejected from the tip of the nozzle 50 . Moreover, after the nozzle 50 turns, the spherical portion 23 is pressed against the contact surface 14 of the main body 10 by the restoring force of the elastic member 40 acting upward in the first direction D1. can be held. Therefore, according to the swivel nozzle 1 according to the present embodiment, the swivel of the nozzle 50 is easy, and the posture of the nozzle 50 after swiveling can be maintained.

(Embodiment 2)
Next, the configuration of the swirl nozzle 2 according to Embodiment 2 will be described with reference to FIG. Embodiment 2 is basically the same as Embodiment 1, but differs in that the annular member 30 is omitted. Differences from the first embodiment will be described below.

FIG. 3 is a cross-sectional view of the swirl nozzle 2 along the first direction D1, and corresponds to FIG. 2 of the first embodiment. The elastic member 41 in the present embodiment contacts the surface of the spherical portion 23 and directly presses the spherical portion 23 against the contact surface 14 by a restoring force generated by compression in the first direction D1. As shown in FIG. 3, the elastic member 41 in the present embodiment is a spring in which a wire having a circular shape when viewed in the longitudinal direction is spirally wound, but the elastic member 41 is not limited to this. According to the swirl nozzle 2 according to the present embodiment, the number of parts is reduced compared to the swirl nozzle 1 according to the first embodiment, and cost reduction and simplification of the configuration can be achieved.

(Other embodiments)
Other embodiments will now be described.

The annular member 30 is not limited to including the extending portion 31, and the extending portion 31 may be omitted. That is, the annular member 30 may be composed of only the spherical contact portion 32 .

The surface roughness of the contact surface 14 is the same as the surface roughness of the inner wall surfaces of the second through hole 19 other than the contact surface 14 (the first inner wall surface 15, the second inner wall surface 16 and the third inner wall surface 17). There may be.

The nozzle 50 is not limited to being inserted into the first through hole 21, and may be fixed to the surface of the spherical portion 23, for example. Further, the nozzle 50 is not limited to being separate from the spherical portion 23, and the nozzle 50 and the spherical portion 23 may be integrally formed.

In the above embodiment, the case where a spring body is employed as an elastic member has been described as an example, but the present invention is not limited to this. For example, a rubber body or the like may be employed as the elastic member.

It should be understood that the embodiments disclosed this time are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope of equivalence to the scope of claims.

REFERENCE SIGNS LIST 1, 2 swivel nozzle, 10 main body, 11 mounting portion, 12 tightening portion, 13 screw portion, 14 contact surface, 15 first inner wall surface, 16 second inner wall surface, 17 third inner wall surface, 18 concave groove, 19 2nd through hole 20 turning part 21 first through hole 22 inner wall surface 23 spherical part 30 annular member 30A curved surface 31 extending part 32 spherical contact part 40, 41 elastic member 50 nozzle D1 First direction, D2 Second direction, L1 minimum diameter, L2 maximum diameter.

Claims (5)

a swivel portion including a spherical portion in which a linear first through hole passing through the center of the sphere is formed;
A second through hole penetrating in a first direction is provided, and the spherical portion is accommodated in the second through hole. a main body part provided in a part in the first direction;
an elastic member disposed in the second through-hole in a compressed state that can stretch and contract in the first direction;
The maximum diameter of the spherical portion is larger than the minimum diameter of the contact surface,
In the first direction, the elastic member is arranged on the opposite side of the contact surface when viewed from the maximum diameter portion of the spherical portion,
The swivel nozzle, wherein the elastic member directly or indirectly presses the spherical portion against the contact surface by a restoring force caused by compression in the first direction. An annular member having an annular curved surface along the surface of the spherical portion and in contact with the surface of the spherical portion on the inner peripheral surface and disposed between the spherical portion and the elastic member;
The swirl nozzle according to claim 1, wherein the elastic member indirectly presses the spherical portion against the contact surface via the annular member. The annular member is made of an elastically deformable material,
The annular member is
an annular spherical contact portion including the curved surface;
3. The turning according to claim 2, further comprising: an annular extending portion connected to the spherical body contact portion and extending radially inward from the spherical body contact portion so as to overlap with the spherical portion in the first direction. nozzle. The elastic member is a spring in which a plate-shaped wire having a square shape when viewed in the longitudinal direction is spirally wound,
4. The spring according to claim 2 or 3, wherein in a cross section along the first direction, the spring has a shape in which the length in a second direction perpendicular to the first direction is greater than the length in the first direction. swivel nozzle. The swirl nozzle according to any one of claims 1 to 4, wherein the surface roughness of the contact surface is larger than the surface roughness of the inner wall surface of the second through hole other than the contact surface. .

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