High-pressure jet device

Abstract

To provide a high-pressure jet device with a simple structure. [Solution] The high-pressure jet device 10 includes a nozzle rotating shaft 25 that penetrates the nozzle head 15 and is rotatably positioned on the nozzle head 15 and has a first passage 25c that penetrates the nozzle rotating shaft 25; a swivel joint 51 positioned at the base end of the nozzle rotating shaft 25 and connected to the first passage 25c; a spindle housing 29 positioned on the nozzle head 15; a spindle 31 supported by the spindle housing 29 and connected to the tip of the nozzle rotating shaft 25, which rotates integrally with the nozzle rotating shaft 25, and having a flange 31c positioned at the tip and a second passage 31d that penetrates the spindle 31 and is connected to the first passage 25c; a nozzle 40 having a first nozzle 43a connected to the second passage 31d and connected to the flange 31c; and a transmission unit 34 that transmits the rotation of the nozzle rotating 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 separable 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 complicated structure. An object of the present invention is to provide a high-pressure jet device having a simple structure.

Means for Solving the Problems

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

[0005] High-pressure jet equipment includes, for example, cleaning machines, peening equipment that uses high-pressure jets, and deburring equipment that uses high-pressure jets. The transmission unit has an anti-rotation shaft and a receiving part. The anti-rotation shaft is located at the tip of the nozzle rotation shaft, and the receiving part is located at the base end of the spindle. Alternatively, the anti-rotation shaft may be located at the base end of the spindle, and the receiving part may be located at the tip of the nozzle rotation shaft. The anti-rotation shaft is, for example, a keyed shaft, a serrated shaft, a D-cut shaft, a square head, or a hexagonal head. The receiving part is, for example, a keyway, a serrated hole, a D-shaped hole, a square hole, a square groove, or a hexagonal hole. The recess is, for example, a groove or a hole. The axis planes may be arranged rotationally symmetrically with respect to the central axis. For example, the axis planes may be arranged 2-fold or 3-fold symmetrically. The number of receptive planes may be the same as the number of axis planes. Each receptive plane is in contact with an axis plane. The contact hole is located at the base end of the spindle, and the insertion tube is located at the tip of the nozzle rotation axis. Alternatively, the contact hole may be located at the tip of the nozzle rotation axis, and the insertion tube may be located at the base end of the spindle. [Effects of the Invention]

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

[0007] [Figure 1]Cross-sectional view of the high-pressure jet device of the embodiment [Figure 2] Sectional view along line II-II in Figure 1 [Figure 3] Enlarged view of part III in Figure 1 [Modes for carrying out the invention]

[0008] As shown in Figure 1, the high-pressure jet device (peening device) 10 of the embodiment includes a frame 11, a processing tank 12, a moving device 14, a quill (feeding 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. Figure 1 is a cross-sectional view along line II in Figure 2. Line II is the YZ plane passing through the central axis 1.

[0009] As shown in Figure 1, the processing tank 12 is positioned on the frame 11. The processing tank 12 stores the processing liquid 4 and the abrasive material 6. The workpiece 3 is placed in the processing tank 12.

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

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

[0012] The nozzle head 15 includes a gear chamber 15a, a lower surface 15b, a nozzle rotating 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 driving gear 23, the intermediate gear 19, and the second bevel gear 27 are disposed inside the gear chamber 15a. The driving gear 23 is fastened to the tip of the propeller shaft 21 (the left end in FIG. 1). The driving 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 portion of the intermediate gear 19 and meshes with the driving gear 23. The first bevel gear 19a is connected to the cylindrical gear 19b.

[0014] The nozzle rotating shaft 25 penetrates the nozzle head 15. The nozzle rotating shaft 25 is supported by the nozzle head 15 via a bearing 26. The nozzle rotating shaft 25 extends along the central axis 1. The central axis 1 extends in the Z direction. The nozzle rotating shaft 25 rotates about the central axis 1. The rotation of the nozzle rotating shaft 25 is transmitted to the spindle 31 by a transmission portion 34. The second bevel gear 27 is fastened to the nozzle rotating shaft 25. The second bevel gear 27 meshes with the first bevel gear 19a. The motor 22 rotates the nozzle rotating shaft 25 via the driving 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 in two-fold symmetry. The shaft plane 25a extends from the tip to the base end direction of the nozzle rotation shaft 25. 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 in 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 Figure 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 sealing hole 32 has, in order from the opening, an internal thread 32a, a contact hole 32b, and a punch hole 32c. The internal thread 32a, the contact hole 32b, and the punch hole 32c extend along the central axis 1. The inner diameter of the internal thread 32a is larger than the inner diameter of the contact hole 32b. The contact hole 32b is a straight cylinder. The punch hole 32c is a straight cylinder. The inner diameter of the punch hole 32c is smaller than the inner diameter of the contact hole 32b.

[0020] As shown in Figure 3, the seal assembly 33 includes 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 also has an O-ring groove 35f and a connector flow path 35e. The shaft portion 35a, O-ring groove 35f, male thread 35b, contact surface 35c, insertion tube 35d, and 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 located on the shaft portion 35a. The male thread 35b is fastened to the female thread 28b. The contact surface 35c contacts the guide hole 28a. The contact surface 35c may have a tightening portion (not shown). The tightening portion may be, 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 passes through the connector 35. The insertion tube 35d passes through the seal retainer 39 and the block seal 37 and extends to the hole 32c. The O-ring 36 is fitted into 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 fitted into the contact hole 32b. The material of the block seal 37 is plastic. The block seal 37 has the strength to elastically deform under the pressure of the fluid passing through it. The block seal 37 has a highly lubricated surface. The block seal 37 may be made of, for example, fluororesin or 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 against the insertion tube 35d. The outer cylindrical surface 37b abuts against the contact hole 32b. The O-ring groove 37c is located on the outer cylindrical surface 37b. The block seal 37 deforms due to the pressure of the flowing liquid, so that the outer cylindrical surface 37b adheres tightly to the contact hole 32b and the inner cylindrical surface 37a adheres tightly to the insertion tube 35d. The O-ring 38 is fitted into the O-ring groove 37c. The O-ring 38 seals the space 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 screw 39b, a pressing portion 39a, a relief hole 39d, and a through hole 39c. The male screw 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 located on the near 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 tube 35d. The through hole 39c passes through the seal retainer 39. The inner diameter of the through hole 39c is substantially equal to the outer diameter of the insertion tube 35d. When pressurized fluid flows into the seal assembly 33, the block seal 37 is pressed by the fluid pressure in a direction that causes it to pop out of the seal hole 32. The pressing part 39a presses the block seal 37 to prevent it from falling out.

[0024] The spindle housing 29 is a hollow, straight cylinder and is positioned 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 axis 25. As shown in Figures 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 located 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 arranged 2 times symmetrically 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 each abut against the axial plane 25a. The cylindrical surface 31b slides against the spindle hole 29a. The flange 31c is located on the tip surface of the spindle 31. The flange 31c has positioning pin holes, keyways, and bolt holes (none of which are shown). The seal hole 32 is located at the base end 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 located on the cylindrical surface 31b. The annular flow path 31g is located midway between the pair of bearings 30 and encircles the outer circumference of the spindle 31. The spindle 31 is fixed to the spindle housing 29 and the bearings 30 in a retractable manner below the nozzle head 15.

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

[0028] As shown in Figure 1, the nozzle 40 includes a nozzle block 41, a first nozzle tip 43, and a second nozzle tip 45. The first nozzle tip 43 has a first nozzle opening 43a. The first nozzle tip 43 is positioned on the tip surface of the nozzle block 41 and ejects a first jet 5 along the central axis 1. The second nozzle tip 45 has a second nozzle opening 45a. The second nozzle tip 45 is positioned on the side of the tip of the nozzle block 41. The second nozzle tip 45 ejects the second jet 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 prism-shaped (for example, a square prism) and extends along the central axis 1. The mounting surface 41a is attached to the flange 31c by bolts (not shown) or pins (not shown). The fifth flow path 41b opens into the flange 31c and is connected to the second flow path 31d. The fifth flow path 41b is connected to the first nozzle 43a. The sixth flow path 41c opens into the flange 31c and is connected to the fourth flow path 31f. The sixth flow path 41c is connected to the second nozzle 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 passage 35e, the vent hole 32c, the first passage 25c, the second passage 31d, and the fifth passage 41b, and is ejected from the first nozzle 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 is ejected from the second nozzle 45a.

[0032] The high-pressure jet device 10 of this embodiment provides the following effects. The high-pressure jet device 10 has a first nozzle tip 43 connected to a first pump 61 and a second nozzle tip 45 connected to a second pump 59. Therefore, it can eject a first jet 5 and a second jet 7 with different pressures. This allows different high-pressure jet treatments to be performed using treatment liquids 4 with different pressures. For example, peening and chipping treatments can be performed with the first jet 5 at a relatively high first pressure (e.g., 150 MPa). Also, deburring and cleaning can be performed with the second jet 7 at 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 sealing member can be shared in two locations. This reduces the number of maintenance parts required.

[0034] The seal assembly 33 does not have a flange for connecting nozzles, etc. According to this 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. This allows the nozzle 40 to be selectively and interchangeably mounted on the spindle 31.

[0035] An annular channel 31g is positioned between the spindle 31 and the spindle housing 29. This allows for the placement of a second liquid channel supplied from the outer circumference of the spindle 31, in addition to the first liquid channel passing through the center of the spindle 31. This enables the two channels to be arranged compactly.

[0036] The insertion tube 35d can be withdrawn from the block seal 37 and the seal retainer 39. The insertion tube 35d is positioned on the nozzle rotation axis 25. The block seal 37 is positioned on the spindle 31. 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 withdrawn from the axial plane 25a along the central axis 1. This allows the spindle 31 to be withdrawn from the nozzle rotation axis 25 along the central axis 1. As in the peening apparatus described in Patent Document 1, when abrasives are mixed into the processing tank 12, the nozzle 40 and spindle 31 may wear out quickly. In this embodiment, the spindle 31 can be removed from the nozzle head 15 together with the spindle housing 29 and nozzle 40. Therefore, maintenance is easy.

[0037] The present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. All technical matters included in the technical concept described in the claims are covered by the present invention. The embodiments described above are preferred examples, but those skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed herein, and these are included in the technical scope described in the appended claims. [Explanation of Symbols]

[0038] 1 Center axis 10. High-pressure jet device 15 Nozzle heads 25 Nozzle rotation axis 25a Axis plane (anti-rotation axis) 25c First channel 29 Spindle Housing 31 spindles 31a Receptive plane (receptive part) 31c flange 31d Second channel

Claims

1. Nozzle head and A nozzle rotation shaft that penetrates the nozzle head and is rotatably positioned 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 connector is positioned at the base end of the nozzle rotation shaft and connected to the first flow path, A spindle housing positioned in the nozzle head, A spindle supported by the spindle housing, connected to the tip of the nozzle rotation shaft, and rotating integrally with the nozzle rotation shaft, A flange positioned at the tip, A second channel extends in the axial direction, penetrates the spindle, and is connected to the first channel, A spindle having, 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 shaft to the spindle, A high-pressure jet device having a high pressure jet.

2. The aforementioned transmission unit is A rotation-preventing shaft positioned at the tip of the nozzle rotation shaft, A receiving portion is provided at the base end of the spindle into which the anti-rotation shaft can be inserted, A high-pressure jet device according to claim 1, having the following features.

3. The aforementioned transmission unit is A rotation-preventing shaft positioned at the base end of the spindle, A receiving portion is provided at the tip of the nozzle rotation shaft into which the anti-rotation shaft can be inserted, A high-pressure jet device according to claim 1, having the following features.

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

5. The anti-rotation shaft has an axial plane parallel to the central axis, The receiving portion is a recess having a receiving plane that contacts the axial plane. A high-pressure jet device according to any one of claims 1 to 4.

6. The aforementioned transmission unit is An insertion tube positioned between the nozzle rotation shaft and the spindle and connected to the first flow path, the insertion tube protruding from the tip surface of the nozzle rotation shaft along the central axis, The insertion tube can be inserted into the contact hole which is connected to the second flow path, A packing is placed inside the contact hole and seals the space between the contact hole and the insertion tube with liquid, Having, A high-pressure jet device according to any one of claims 2 to 5.

7. The first channel is a single channel extending along the central axis, The second channel is a single channel extending along the central axis. A high-pressure jet device according to any one of claims 1 to 6.

8. An annular channel disposed between the spindle and the spindle housing, A third channel is disposed in the spindle housing and connected to the annular channel, A fourth channel is provided on the spindle, opens into the flange, and is connected to the annular channel, It further possesses, The nozzle has a second nozzle that is connected to the fourth flow path. A high-pressure jet device according to any one of claims 1 to 7.

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