JPH0546944U - Coolant injection jacket - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a cooling liquid injection jacket for injecting a cooling liquid for quenching onto the outer peripheral surface of an annular work piece, which can cope with works of various diameters by one piece. [Structure] A jacket 100 for injecting a cooling liquid L onto an outer peripheral surface 51 of an idler 50, and an annular upper jacket 10 and lower jacket 20 provided above and below the idler 50 so as to surround the idler 50, and these. A means to change the distance between both jackets and the upper jacket 10
And the upper jacket so that the cooling liquid L is jetted obliquely downward and upward from the lower jacket 20 respectively.
The cooling liquid injection holes 16 and 26 provided in the lower jacket 20 and the lower jacket 20 are provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cooling liquid jet jacket used when induction hardening is performed on the outer peripheral surface of an annular work.

[0002]

[Prior Art]

 Hereinafter, a conventional technique will be described with reference to the drawings. FIG. 3 is a cross-sectional explanatory view of a conventional cooling liquid injection jacket, and an explanation will be given by taking an idler used in a traveling system such as a construction machine as a work. On an outer peripheral surface 51 of a wheel-shaped idler 50 in which a shaft portion 54 is inserted and fixed to an axle (not shown), a convex portion 52 is formed over the entire circumference of the outer peripheral surface 51. The outer peripheral surfaces 51 on both sides of the convex portion 52 are flat portions 53. 55 is the axis of rotation of the idler 50.

In order to quench the outer peripheral surface 51 of such an idler 50, while rotating the idler 50 about a shaft 55 in the air, the outer peripheral surface 51 is not covered by an appropriate high frequency heating coil (not shown). After heating, after this heating, the idler 50 is immersed inside the annular coolant injection jacket 70 arranged in the coolant L stored in the coolant tank 80.

The cooling liquid jetting jacket 70 includes three annular walls 73 to 75 arranged in a concentric circle shape, and an annular top plate 71 and a bottom plate 72 that are liquid-tightly attached to the upper and lower portions of these walls. Equipped with. A plurality of cooling liquid injection holes 76 are formed in the inner wall 73, and a plurality of cooling liquid passage holes 77 are formed in the central wall 74.

The idler 50, which is arranged inside the cooling liquid injection jacket 70 so that the shaft 55 is vertical, is still rotated about the shaft 55. Then, the cooling liquid L sent into the space between the walls 74 and 75 by a pump (not shown) passes through the cooling liquid passage hole 77 of the wall 74 and enters the space between the walls 73 and 74, and then the cooling liquid injection hole. It is jetted from 76 toward the outer peripheral surface 51 of the idler 50. The wall 74 is also called a pressure equalizing plate, and has an effect of making the pressure of the cooling liquid L reaching the space between the walls 73 and 74 substantially equal in any of the cooling liquid injection holes 76.

[0006]

[Problems to be solved by the device]

 However, the above-mentioned conventional cooling liquid injection jacket has the following problems. That is, since the diameter and the width of the idler are variously changed, it is necessary to prepare a cooling liquid injection jacket corresponding to the diameter and the width of the idler each time, which increases the cost of the cooling device. Further, in the conventional jacket 70, the cooling liquid L is insufficiently injected to the corner portion, which is the intersection of the convex portion 52 and the flat portion 53 of the idler 50, and the corner portion is insufficiently cooled.

The present invention was devised in view of the above circumstances, and when cooling the outer peripheral surface of an annular work for quenching, works of various diameters and widths are cooled by one jacket. It is an object of the present invention to provide a cooling liquid injection jacket that can be used.

[0008]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the cooling liquid injection jacket of the present invention encloses the work in a jacket for injecting the cooling liquid for quenching onto the outer peripheral surface of an annular work having a shaft arranged substantially vertically. An annular upper jacket provided above the work, an annular lower jacket provided below the work so as to surround the work, a means for changing the distance between the two jackets, and obliquely downward from the upper jacket. A cooling liquid injection hole is provided in the upper jacket so as to inject the cooling liquid, and a cooling liquid injection hole is provided in the lower jacket so as to inject the cooling liquid obliquely upward from the lower jacket.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 are drawings for explaining the present embodiment, FIG. 1 is a sectional view taken along the line AA of FIG. 2, and FIG. 2 is a plan view. The same components as those described in the related art will be described with the same reference numerals. For the work, the idler picked up by the conventional technique will be picked up again.

As shown in FIGS. 1 and 2, the cooling liquid injection jacket 100 of this embodiment has an annular shape and is immersed in the cooling liquid L stored in the cooling liquid tank 60 and cooled. The idler 50 is arranged inside the cooling liquid injection jacket 100. As shown in FIG. 1, the cooling liquid injection jacket 100 of this embodiment includes an annular upper jacket 10 and an annular lower jacket 20.

The upper jacket 10 is provided with three annular walls 13 to 15 arranged in a concentric circle shape, and an annular top plate 11 and a bottom plate 12 liquid-tightly attached to the upper and lower parts of these walls, respectively. ing . The inner wall 13 is provided with a plurality of cooling liquid injection holes 16, and the central wall 14 is provided with a plurality of cooling liquid passage holes 17, respectively. The cooling liquid injection holes 16 are formed so that the cooling liquid L injected from these holes advances obliquely downward.

The lower jacket 20 includes three annular walls 23 to 25 arranged in a concentric circle shape, and an annular top plate 21 and a bottom plate 22 liquid-tightly attached to the upper and lower portions of these walls, respectively. I have it. The inner wall 23 has a plurality of cooling liquid injection holes 26, and the central wall 24 has a plurality of cooling liquid passage holes 27. The cooling liquid injection holes 26 are formed so that the cooling liquid L injected from these holes advances obliquely upward.

A nut 31 is erected on the upper surface of the top plate 21, and a bolt 30 whose upper end abuts the bottom plate 12 is screwed onto the inner surface of the nut 31.

A bolt 35 which is erected vertically on the upper surface of the foot 39 installed on the installation surface G penetrates the bottom plate 12 and the top plate 21. A collar 37 through which the bolt 35 penetrates is provided between the foot 39 and the top plate 21, and a collar 36 through which the bolt 35 penetrates is also provided between the top plate 21 and the bottom plate 12. Has been. Reference numeral 38 denotes a nut that is screwed onto the bolt 35 on the bottom plate 12, and by fastening the nut 38 toward the bottom plate 12, the bottom plate 12 and the top plate 21 are fixed to both ends of the collar 36.

Next, the operation of this embodiment will be described. The idler 50, whose outer peripheral surface 51 is heated by a high-frequency heating coil (not shown) while being rotated about an axis 55 in air, has a cooling liquid injection jacket 100 provided in a cooling liquid L in a cooling liquid tank 60. Is immersed in the cooling liquid L on the inside. At this time, the idler 50 continues to rotate around the vertically arranged shaft 55.

When the idler 50 is immersed in the cooling liquid L, the cooling liquid L pumped into the space between the walls 14 and 15 and the space between the walls 24 and 25 by a pump (not shown) is cooled by the wall, respectively. After passing through the cooling liquid passage holes 17 and 27 of 14 and 24 and entering the space between the walls 13 and 14 and the space between the walls 23 and 24, the outer surface 51 of the idler 50 from the cooling liquid injection holes 16 and 26. Is jetted toward.

The cooling liquid L sprayed from the cooling liquid spray hole 16 is sprayed obliquely downward and contacts almost the upper half of the outer peripheral surface 51 of the idler 50 to cool this portion. The cooling liquid L sprayed from the cooling liquid spray hole 26 is sprayed obliquely upward and contacts almost the lower half of the outer peripheral surface 51 of the idler 50 to cool this portion. By injecting the cooling liquid L from the cooling liquid injection holes 16 and 26 for a predetermined time, the outer peripheral surface 51 of the idler 50 is cooled and a hardened layer is formed on the outer peripheral surface 51.

When cooling the idler 50A (shown by the dotted line in FIG. 1) having a diameter larger than that of the idler 50, the nut 30 is rotated to lower it by a predetermined distance, and at the same time, the nut 38 is loosened to loosen the nut 38 from the bolt 35. Remove the upper jacket 10, collar 36, lower jacket 20 and color 37, replace the collar 36 with a shorter one, and replace the collar 37 with a longer one, and then replace the bolt 35 again with the replaced collar 37. After the lower jacket 20, the collar 36 and the upper jacket 10 are externally fitted, the nut 38 is screwed and tightened to fix the bottom plate 12 and the top plate 21 to both ends of the collar 36. However, the length of the exchanged collars 36, 37 is again the center of the space between the bottom plate 12 and the top plate 21 when the upper and lower jackets 10, 20 are fixed to both ends of the exchanged collar 36. The height H of the point (Fig. 1) is chosen so that it remains unchanged from before the replacement of the collars 36, 37. When cooling an idler having a diameter smaller than that of the idler 50, the collar 36 can be replaced with a longer one and the collar 37 can be replaced with a shorter one, which can be dealt with similarly to the idler 50A.

In this way, the distance between the cooling liquid injection holes 16 and 26 becomes shorter, and when cooling the idler 50A having a diameter larger than that of the idler 50, the cooling liquid sprayed from the cooling liquid injection holes 16 and 26 is cooled. The L contacts the upper half and the lower half of the peripheral surface of the idler 50A, respectively, so that good cooling can be performed.

[0020]

[Effect of the device]

 As described above, the cooling liquid injection jacket of the present invention is a jacket for injecting the cooling liquid for quenching onto the outer peripheral surface of an annular work whose shaft is arranged substantially vertically, so as to surround the work. An annular upper jacket provided on the upper side, an annular lower jacket provided on the lower side of the work so as to surround the work, a means for changing the distance between the two jackets, and a cooling liquid obliquely downward from the upper jacket. A cooling liquid injection hole is provided in the upper jacket for spraying, and a cooling liquid injection hole is provided in the lower jacket for spraying the cooling liquid obliquely upward from the lower jacket.

Therefore, in the cooling liquid jetting jacket of the present invention, the distance between the upper jacket and the lower jacket can be changed according to the diameter of the work, so that the jacket can be replaced even if the diameter of the annular work changes. It is possible to cool the outer peripheral surface of the work without having to do so.

[Brief description of drawings]

FIG. 1 is a cross sectional view taken along the line AA of FIG.

FIG. 2 is a plan view of an embodiment of the present invention.

FIG. 3 is a cross-sectional explanatory view of a conventional cooling liquid injection jacket.

[Explanation of symbols]

 10 Upper jacket 16 Coolant injection hole 20 Lower jacket 26 Coolant injection hole 50, 50A idler 51 Circumferential surface

Claims (1)

[Scope of utility model registration request] 1. A jacket for injecting a cooling liquid for quenching onto an outer peripheral surface of an annular work having a shaft arranged substantially vertically, the annular upper jacket being provided above the work so as to surround the work, An annular lower jacket provided below the work so as to surround the work, a means for changing the distance between the two jackets, and a cooling liquid provided in the upper jacket so as to inject the cooling liquid obliquely downward from the upper jacket. A cooling liquid injection jacket comprising: an injection hole; and a cooling liquid injection hole provided in the lower jacket so as to inject the cooling liquid obliquely upward from the lower jacket.