High-pressure jet device

Abstract

Provided is a high-pressure jet device with a simple structure. 【Solution means】The high-pressure jet device 10 includes a nozzle rotation shaft 25 that penetrates through a nozzle head 15, is rotatably arranged on the nozzle head 15, and has a first flow path 25c that penetrates through a nozzle rotation axis 25; a swivel joint 51 that is arranged at a base end portion of the nozzle rotation shaft 25 and is connected to the first flow path 25c; a spindle housing 29 that is arranged on the nozzle head 15; and a spindle 31 that is supported by the spindle housing 29, is connected to a tip end portion of the nozzle rotation shaft 25, and rotates integrally with the nozzle rotation shaft 25. The spindle 31 has a flange 31c arranged at the tip end portion, and a second flow path 31d that penetrates through the spindle 31 and is connected to the first flow path 25c. The high-pressure jet device 10 further includes a nozzle 40 that has a first nozzle 43a connected to the second flow path 31d and is connected to the flange 31c, and a transmission portion 34 that transmits the rotation of the nozzle rotation shaft 25 to the spindle 31.

Description

Technical Field

[0001] The present invention relates to a high-pressure jet device.

Background Art

[0002] A peening device using a high-pressure jet is known (Japanese Patent Application Laid-Open No. 2023-42831, hereinafter referred to as Patent Document 1). This peening device has a moving part and a nozzle head part that can be separated from the moving part. The moving part has a quill, a first head, and a first spindle. The first head has a mounting hole and is disposed at the tip of the quill. The first spindle protrudes from the mounting hole. The nozzle head part has a second head, a connecting shaft, a second spindle, a nozzle, and a swivel joint. The second head has a connection port connected to the mounting hole. The connecting shaft is connected to the first spindle. The nozzle is disposed below the second spindle. The swivel joint is disposed at the upper end of the second spindle and is connected to the nozzle.

Summary of the Invention

Problems to be Solved by the Invention

[0003] The high-pressure jet device of Patent Document 1 has a complex structure. An object of the present invention is to provide a high-pressure jet device with a simple structure.

Means for Solving the Problems

[0004] A first aspect of the present invention is a nozzle head, a nozzle rotation shaft that penetrates the nozzle head and is rotatably disposed on the nozzle head about a central axis, the nozzle rotation shaft extending in the axial direction and having a first flow path that penetrates the nozzle rotation shaft, a swivel joint disposed at a base end portion of the nozzle rotation shaft and connected to the first flow path, a spindle housing disposed on the nozzle head, A spindle that is supported by the spindle housing, connected to the tip of the nozzle rotation axis, and rotates integrally with the nozzle rotation axis, a flange disposed at the tip, a second flow path that extends in the axial direction, penetrates the spindle, and is connected to the first flow path, and has a spindle, a nozzle having a first nozzle connected to the second flow path and connected to the flange, a transmission unit that transmits the rotation of the nozzle rotation axis to the spindle, and is a high-pressure jet device having.

[0005] The high-pressure jet device is, for example, a cleaning machine, a peening device using a high-pressure jet, or a deburring device using a high-pressure jet. The transmission unit has a rotation prevention shaft and a receiving portion. The rotation prevention shaft is disposed at the tip of the nozzle rotation axis, and the receiving portion is disposed at the base end of the spindle. The rotation prevention shaft may be disposed at the base end of the spindle, and the receiving portion may be disposed at the tip of the nozzle rotation axis. The rotation prevention shaft is, for example, a keyed shaft, a serrated shaft, a D-cut shaft, a square head, or a hexagonal head. The receiving portion is, for example, a key groove, a serration hole, a D-shaped hole, a square hole, a groove, or a hexagonal hole. The recess is, for example, a groove or a hole. The axial plane may be disposed rotationally symmetrically with respect to the central axis. For example, the axial plane is disposed symmetrically with respect to two or three rotations. The receiving plane may be disposed in the same number as the axial plane. The receiving plane abuts against the axial plane respectively. The contact hole is disposed at the base end of the spindle, and the insertion tube is disposed at the tip of the nozzle rotation axis. The contact hole may be disposed at the tip of the nozzle rotation axis, and the insertion tube may be disposed at the base end of the spindle.

Advantages of the Invention

[0006] According to the present invention, a high-pressure jet device with a simple structure can be provided.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Embodiments for Carrying Out the Invention

[0008] As shown in FIG. 1, the high-pressure jet device (peening device) 10 according to the embodiment includes a frame 11, a treatment tank 12, a moving device 14, a quill (feed table) 13, a nozzle head 15, a swivel joint 51, a spindle housing 29, a spindle 31, a transmission unit 34, a nozzle 40, a first pump 61, and a second pump 59. FIG. 1 is a cross-sectional view taken along line I-I of FIG. 2. Line I-I is a YZ plane passing through the central axis 1.

[0009] As shown in FIG. 1, the treatment tank 12 is disposed on the frame 11. The treatment tank 12 stores the treatment liquid 4 and the abrasive 6. A workpiece 3 is installed in the treatment tank 12.

[0010] The moving device 14 is disposed on the frame 11. The moving device 14 moves the quill 13 in the left-right direction (X direction), the front-rear direction (Y direction), and the up-down direction (Z direction).

[0011] The quill 13 is in a hollow cylindrical shape and extends in the Y direction. The quill 13 is disposed on the moving device 14. The quill 13 has a motor 22 and a propeller shaft 21. The motor 22 is disposed at the base end portion (the right end portion in FIG. 1) of the quill 13. The propeller shaft 21 extends along the quill 13 and is disposed inside the quill 13. The propeller shaft 21 is connected to the motor 22.

[0012] The nozzle head 15 has a gear chamber 15a, a lower surface 15b, a nozzle rotation shaft 25, a bearing 26, a fixed shaft 17, a bearing 18, a driving gear 23, an intermediate gear 19, and a second bevel gear (driven gear) 27. The gear chamber 15a is disposed inside the nozzle head 15. The lower surface 15b is a plane located at the lower end of the nozzle head 15.

[0013] The fixed shaft 17, the drive gear 23, the intermediate gear 19, and the second bevel gear 27 are disposed inside the gear chamber 15a. The drive gear 23 is fastened to the tip of the propeller shaft 21 (the left end in FIG. 1). The drive gear 23 is a cylindrical gear. The fixed shaft 17 is fixed to the nozzle head 15 and extends in the Y direction. The intermediate gear 19 is supported by the fixed shaft 17 via a bearing 18. The intermediate gear 19 rotates about the fixed shaft 17. The intermediate gear 19 has a cylindrical gear 19b and a first bevel gear 19a. The cylindrical gear 19b is disposed at the base end of the intermediate gear 19 and meshes with the drive gear 23. The first bevel gear 19a is connected to the cylindrical gear 19b.

[0014] The nozzle rotation shaft 25 penetrates the nozzle head 15. The nozzle rotation shaft 25 is supported by the nozzle head 15 via a bearing 26. The nozzle rotation shaft 25 extends along the central axis 1. The central axis 1 extends in the Z direction. The nozzle rotation shaft 25 rotates about the central axis 1. The rotation of the nozzle rotation shaft 25 is transmitted to the spindle 31 by a transmission portion 34. The second bevel gear 27 is fastened to the nozzle rotation shaft 25. The second bevel gear 27 meshes with the first bevel gear 19a. The motor 22 rotates the nozzle rotation shaft 25 via the drive gear 23, the intermediate gear 19, and the second bevel gear 27.

[0015] As shown in FIGS. 1 to 3, the nozzle rotation shaft 25 has a shaft plane (anti-rotation shaft) 25a, a connector hole 28, a female thread 25b, and a first flow path 25c. The shaft plane 25a is disposed at the tip of the nozzle rotation shaft 25 (the lower end in FIG. 1). The shaft plane 25a is parallel to the central axis 1 and is symmetrically arranged about the central axis 1 twice. The shaft plane 25a extends from the tip of the nozzle rotation shaft 25 toward the base end. The shaft plane 25a protrudes from the lower surface 15b. The connector hole 28 is disposed at the tip of the nozzle rotation shaft 25 and extends along the central axis 1. The female thread 25b is disposed at the base end of the nozzle rotation shaft 25 (the upper end in FIG. 1) and extends along the central axis 1. The first flow path 25c extends along the central axis 1 and connects the female thread 25b and the connector hole 28.

[0016] The transmission part 34 has a receiving groove (receiving part) 31e, a shaft plane (anti-rotation shaft) 25a, a connector hole 28, a seal hole 32, and a seal assembly 33.

[0017] As shown in FIG. 1, the swivel joint 51 has a swivel shaft 53, a bearing 56, a swivel housing 55, and a seal assembly 33. The swivel shaft 53 is a straight cylindrical shape and extends along the central axis 1. The swivel shaft 53 has a male thread 53a, a connector hole 28, and a flow path 53b. The male thread 53a is fastened to the female thread 25b. The connector hole 28 is connected to the female thread 25b. The flow path 53b connects the connector hole 28 and the first flow path 25c. The swivel housing 55 is supported by the swivel shaft 53 via the bearing 56. The swivel housing 55 has an inlet 55a and a seal hole 32. The inlet 55a is connected to the seal hole 32. The inlet 55a is connected to the first pump 61. The seal assembly 33 is disposed inside the swivel housing 55.

[0018] As shown in FIG. 3, the connector hole 28 has, in order from the opening, a guide hole 28a, a female thread 28b, and a contact hole 28c. The guide hole 28a, the female thread 28b, and the contact hole 28c extend along the central axis 1. The guide hole 28a is a straight cylinder. The diameter of the guide hole 28a is larger than the diameter of the female thread 28b. The contact hole 28c is a straight cylinder. The diameter of the contact hole 28c is smaller than the diameter of the female thread 28b.

[0019] The seal hole 32 has, in order from the opening, a female thread 32a, a contact hole 32b, and a relief hole 32c. The female thread 32a, the contact hole 32b, and the relief hole 32c extend along the central axis 1. The inner diameter of the female thread 32a is larger than the inner diameter of the contact hole 32b. The contact hole 32b is a straight cylinder. The relief hole 32c is a straight cylinder. The inner diameter of the relief hole 32c is smaller than the inner diameter of the contact hole 32b.

[0020] As shown in FIG. 3, the seal assembly 33 has a connector 35, a seal retainer 39, a block seal (packing) 37, an O-ring 36, and an O-ring (packing) 38. The connector 35 is fastened to the connector hole 28.

[0021] The connector 35 has, in order, a shaft portion 35a, a male thread 35b, a contact surface 35c, and an insertion tube 35d. The connector 35 has an O-ring groove 35f and a connector flow path 35e. The shaft portion 35a, the O-ring groove 35f, the male thread 35b, the contact surface 35c, the insertion tube 35d, and the connector flow path 35e extend along the central axis 1. The shaft portion 35a abuts against the contact hole 28c. The O-ring groove 35f is disposed in the shaft portion 35a. The male thread 35b is fastened to the female thread 28b. The contact surface 35c abuts against the guide hole 28a. The contact surface 35c may have a tightening portion (not shown). The tightening portion is, for example, a square portion, a hexagonal portion, or a parallel surface. The insertion tube 35d protrudes from the connector hole 28. The connector flow path 35e penetrates the connector 35. The insertion tube 35d penetrates the seal retainer 39 and the block seal 37 and extends to the relief hole 32c. The O-ring 36 is mounted in the O-ring groove 35f and seals the gap between the contact hole 28c and the shaft portion 35a.

[0022] The block seal 37 is a hollow straight cylindrical shape and is mounted on the contact hole 32b. The material of the block seal 37 is plastic. The block seal 37 has a strength to elastically deform by the pressure of the fluid passing through the inside. The block seal 37 has a highly lubricious surface. The block seal 37 is, for example, a fluororesin or a polyacetal resin. The block seal 37 has an inner cylindrical surface 37a, an outer cylindrical surface 37b, and an O-ring groove 37c. The inner cylindrical surface 37a slides in the rotational direction on the insertion pipe 35d. The outer cylindrical surface 37b abuts against the contact hole 32b. The O-ring groove 37c is arranged on the outer cylindrical surface 37b. The block seal 37 deforms by the pressure of the flowing liquid, so that the outer cylindrical surface 37b adheres closely to the contact hole 32b and the inner cylindrical surface 37a adheres closely to the insertion pipe 35d. The O-ring 38 is mounted in the O-ring groove 37c. The O-ring 38 seals between the block seal 37 and the contact hole.

[0023] The seal retainer 39 is a hollow stepped cylindrical shape. The seal retainer 39 has a male thread 39b, a pressing portion 39a, a relief hole 39d, and a through hole 39c. The male thread 39b, the pressing portion 39a, the relief hole 39d, and the through hole 39c extend along the central axis 1. The male thread 39b is fastened to the female thread 32a. The pressing portion 39a is inserted into the contact hole 32b. The pressing portion 39a abuts against the contact hole 323b and the block seal 37. The relief hole 39d is arranged on the front side when viewed from the opening of the seal hole 32. The inner diameter of the relief hole 39d is larger than the outer diameter of the insertion pipe 35d. The through hole 39c penetrates the seal retainer 39. The inner diameter of the through hole 39c is substantially equal to the outer diameter of the insertion pipe 35d. When the pressure fluid flows into the inside of the seal assembly 33, the block seal 37 is pressed in the direction of popping out from the seal hole 32 by the pressure of the fluid. The pressing portion 39a presses the block seal 37 so as not to drop off.

[0024] The spindle housing 29 is a hollow straight cylindrical shape and is disposed on the lower surface 15b. The spindle housing 29 extends along the central axis 1. The spindle housing 29 has a spindle hole 29a and a third flow path 29c. The spindle hole 29a extends along the central axis 1.

[0025] The spindle 31 is a straight cylindrical shape. The spindle 31 is supported inside the spindle housing 29 via a bearing 30. The spindle 31 extends along the central axis 1 and is connected to the tip of the nozzle rotation shaft 25. As shown in FIGS. 1 to 3, the spindle 31 has a receiving groove 31e, a cylindrical surface 31b, a flange 31c, a seal hole 32, a second flow path 31d, an annular flow path 31g, and a fourth flow path 31f.

[0026] The receiving groove 31e is disposed at the upper end of the spindle 31. The receiving groove 31e has a pair of receiving planes (receiving portions) 31a. The receiving planes 31a are parallel to the central axis 1 and are symmetrically arranged twice with respect to the central axis 1. The receiving planes 31a extend from the base end to the tip of the spindle 31. The pair of receiving planes 31a respectively abut against the axial plane 25a. The cylindrical surface 31b is in sliding contact with the spindle hole 29a. The flange 31c is disposed on the tip surface of the spindle 31. The flange 31c has a positioning pin hole, a key groove, and a bolt hole (all not shown). The seal hole 32 is disposed at the base end portion of the spindle 31 and extends along the central axis 1. The second flow path 31d extends along the central axis 1 and penetrates from the seal hole 32 to the flange 31c. The annular flow path 31g is disposed on the cylindrical surface 31b. The annular flow path 31g is located in the middle of the pair of bearings 30 and encircles the outer periphery of the spindle 31. The spindle 31 is integrally fixed to the lower part of the nozzle head 15 together with the spindle housing 29 and the bearing 30 so as to be withdrawable.

[0027] The third flow path 29c opens to the inner surface of the spindle housing 29 and is connected to the annular flow path 31g. The third flow path 29c is connected to the second pump 59 via the nozzle head 15 and the quill 13. The fourth flow path 31f connects the annular flow path 31g and the flange 31c.

[0028] As shown in FIG. 1, the nozzle 40 has a nozzle block 41, a first nozzle tip 43, and a second nozzle tip 45. The first nozzle tip 43 has a first nozzle orifice 43a. The first nozzle tip 43 is disposed on the front end surface of the nozzle block 41 and ejects a first jet flow 5 along the central axis 1. The second nozzle tip 45 has a second nozzle orifice 45a. The second nozzle tip 45 is disposed on the side surface of the front end portion of the nozzle block 41. The second nozzle tip 45 ejects a second jet flow 7 in the Y direction.

[0029] The nozzle block 41 has a mounting surface 41a, a fifth flow path 41b, and a sixth flow path 41c. The nozzle block 41 is cylindrical or polygonal (for example, a quadrangular prism) and extends along the central axis 1. The mounting surface 41a is mounted on the flange 31c by bolts (not shown) or pins (not shown). The fifth flow path 41b opens to the flange 31c and is connected to the second flow path 31d. The fifth flow path 41b is connected to the first nozzle orifice 43a. The sixth flow path 41c opens to the flange 31c and is connected to the fourth flow path 31f. The sixth flow path 41c is connected to the second nozzle orifice 45a.

[0030] The first pump 61 is, for example, a piston pump. The first pump 61 pressurizes the processing liquid 4. The processing liquid 4 discharged by the first pump 61 passes through the connector flow path 35e, the drain hole 32c, the first flow path 25c, the second flow path 31d, and the fifth flow path 41b and ejects from the first nozzle orifice 43a.

[0031] The second pump 59 is, for example, a piston pump. The second pump 59 pressurizes the processing liquid 4. The discharge pressure of the second pump 59 is lower than the discharge pressure of the first pump 61. The processing liquid 4 discharged by the second pump passes through the third flow path 29c, the annular flow path 31g, the fourth flow path 31f, and the sixth flow path 41c and ejects from the second nozzle orifice 45a.

[0032] According to the high-pressure jet device 10 of the present embodiment, the following operational effects are achieved. The high-pressure jet device 10 includes a first nozzle tip 43 connected to the first pump 61 and a second nozzle tip 45 connected to the second pump 59. Therefore, the first jet flow 5 and the second jet flow 7 with different pressures can be ejected. As a result, different high-pressure jet treatments using the treatment liquid 4 with different pressures can be carried out. For example, peening treatment or hanging treatment can be carried out by the first jet flow 5 with a relatively high first pressure (e.g., 150 MPa). Also, deburring or cleaning can be carried out by the second jet flow 7 with a relatively low second pressure (e.g., 50 MPa).

[0033] The seal assembly 33 seals the high-pressure liquid between the insertion tube 35d and the block seal 37 fixed in the seal hole 32. The insertion tube 35d can rotate relative to the block seal 37. Therefore, the seal assembly 33 can be used as a seal for the swivel joint 51. By incorporating the seal assembly 33 between the nozzle rotation shaft 25 and the spindle 31, the seal members can be shared at two locations. Therefore, the types of maintenance parts can be reduced.

[0034] The seal assembly 33 does not have a flange for connecting a nozzle or the like. According to the present embodiment, the nozzle head 15 supports the nozzle rotation shaft 25 and the spindle 31. The seal assembly 33 is supported between the nozzle rotation shaft 25 and the spindle 31. The spindle 31 has a flange 31c at its tip. Thus, the nozzle 40 can be selectively and replaceably attached to the spindle 31.

[0035] An annular flow path 31g is arranged between the spindle 31 and the spindle housing 29. As a result, in addition to the first liquid flow path passing through the center of the spindle 31, a second liquid flow path supplied from the outer periphery of the spindle 31 can be arranged. And the two systems of flow paths can be arranged compactly.

[0036] The insertion tube 35d can be pulled out from the block seal 37 and the seal retainer 39. The insertion tube 35d is arranged on the nozzle rotation axis 25. The block seal 37 is arranged on the spindle 31. Also, the axial plane 25a extends from the tip of the nozzle rotation axis 25, and the receiving plane 31a extends from the base end of the spindle 31. The axial plane 25a and the receiving plane 31a are parallel to the central axis 1. Therefore, the receiving plane 31a can be pulled out from the axial plane 25a along the central axis 1. As a result, the spindle 31 can be pulled out from the nozzle rotation axis 25 along the central axis 1. When the abrasive is turbid in the treatment tank 12 as in the peening device of Patent Document 1, the nozzles 40 and the spindle 31 may be worn out quickly. The spindle 31 of the present embodiment can be pulled out from the nozzle head 15 together with the spindle housing 29 and the nozzles 40. Therefore, maintenance is easy.

[0037] The present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the gist of the present invention. All technical matters included in the technical idea described in the claims are the subject of the present invention. The above embodiments show preferred examples, but those skilled in the art can realize various alternative examples, modification examples, variation examples, or improvement examples from the content disclosed in this specification, and these are included in the technical scope described in the appended claims.

Explanation of Reference Numerals

[0038] 1 Central axis 10 High-pressure jet device 15 Nozzle head 25 Nozzle rotation axis 25a Axial plane (anti-rotation axis) 25c First flow path 29 Spindle housing 31 Spindle 31a Receiving plane (receiving portion) 31c Flange 31d Second flow path

Claims

1. A nozzle head, a nozzle rotation shaft that penetrates the nozzle head and is rotatably arranged on the nozzle head about a central axis, the nozzle rotation shaft having a first flow path that extends in the axial direction and penetrates the nozzle rotation shaft, a swivel joint arranged at the base end of the nozzle rotation shaft and connected to the first flow path, a spindle housing arranged on the nozzle head, a spindle supported by the spindle housing, connected to the tip end of the nozzle rotation shaft, and rotating integrally with the nozzle rotation shaft, the spindle having, a flange arranged at the tip end, a second flow path that extends in the axial direction, penetrates the spindle, and is connected to the first flow path, a spindle having the second flow path, a nozzle having a first nozzle connected to the second flow path and connected to the flange, a transmission part that transmits the rotation of the nozzle rotation shaft to the spindle, a high-pressure jet device having the above components.

2. The transmission part includes, a rotation prevention shaft arranged at the tip end of the nozzle rotation shaft, a receiving part arranged at the base end of the spindle and capable of inserting the rotation prevention shaft, The high-pressure jet device according to claim 1, having the above components.

3. The transmission part includes, a rotation prevention shaft arranged at the base end of the spindle, a receiving part arranged at the tip end of the nozzle rotation shaft and capable of inserting the rotation prevention shaft, The high-pressure jet device according to claim 1, having the above components.

4. The spindle is detachably arranged in the tip direction from the nozzle rotation shaft integrally with the spindle housing, The high-pressure jet device according to any one of claims 1 to 3.

5. The rotation prevention shaft has an axial plane parallel to the central axis, The receiving part is a recess having a receiving plane that abuts against the axial plane, The high-pressure jet device according to claim 2 or 3.

6. The transmission part includes, an insertion pipe arranged between the nozzle rotation shaft and the spindle and connected to the first flow path, the insertion pipe protruding along the central axis from the tip end surface of the nozzle rotation shaft, a contact hole capable of inserting the insertion pipe and connected to the second flow path, a packing arranged in the contact hole and liquid-sealing the space between the contact hole and the insertion pipe, having the above components, The high-pressure jet device according to any one of claims 1 to 3.

7. The first flow path is a single flow path extending along the central axis, The second flow path is a single flow path extending along the central axis, The high-pressure jet device according to any one of claims 1 to 3.

8. an annular flow path disposed between the spindle and the spindle housing; a third flow path disposed in the spindle housing and connected to the annular flow path; a fourth flow path disposed in the spindle, opening to the flange, and connected to the annular flow path; further comprising; the nozzle having a second nozzle opening connected to the fourth flow path; The high-pressure jet device according to any one of claims 1 to 3.

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