JPH0436748B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] By connecting to the discharge port of an ultra-high-pressure water pump and jetting ultra-high-pressure water from the tip nozzle, foreign matter attached to the surface of an object can be removed. This invention relates to an ultra-high pressure water spray gun used for peeling and cleaning paint films, deburring molded articles, etc.

[Prior Art] It has been conventionally practiced to perform processing such as cutting and surface treatment of non-metals by jetting ultra-high pressure water from an extremely fine nozzle. The energy of ultra-high pressure water injected from a nozzle increases in proportion to the water pressure and flow rate, but the general trend is to increase the water pressure and reduce the nozzle diameter in order to reduce water consumption. In this case, when cutting or drilling non-metals, only one nozzle is required, but when processing surfaces such as surface polishing and peeling, the nozzle is swung in a plane and multiple nozzles are used to process as wide an area as possible. A nozzle cartridge with an array of nozzles is rotated.

An ultra-high pressure water injection gun that revolves a nozzle cartridge is known, for example, from Japanese Patent Application Laid-Open No. 57-81100. As shown in FIG. 8, this injection gun includes a motor 21 provided in a housing 20, a rotation shaft 23 horizontally mounted rotatably via a gear mechanism 22, and an orbital shaft located at an eccentric position within the rotation shaft 23. It is equipped with 24. A water conduit 25 is formed inside the revolving shaft 24, and a nozzle cartridge 26 is attached to one end of the conduit 25, and a high pressure hose 27 is connected to the other end. Nozzle cartridge 26
For example, as shown in FIG. 9, a plurality of nozzles 28 are provided at intervals in a straight line, or a plurality of nozzles 28 are provided in a disk shape as shown in FIG. 10. In the above injection gun, the motor 21
When driven, the revolution axis revolves inside the rotation axis 23, and the nozzle cartridge 26 attached to the tip
The nozzle 28 injects ultra-high pressure water while rotating. At this time, since the nozzle cartridge 26 does not rotate, the high pressure hose (flexible hose) 27 will not be twisted excessively even if a normal fixed joint (water inlet) 29 is used.

[Problems to be Solved by the Invention] However, since the nozzle cartridge 26 in the above-mentioned injection gun is not restrained so as not to rotate at all, a plurality of nozzles 28 are arranged in a straight line as shown in FIG. In the elongated nozzle cartridge 26, both ends swing irregularly at the same time as the entire nozzle cartridge 26 revolves. The vibrations caused by such irregular rotation cannot be prevented by a balance weight like those caused by revolution, so the entire gun vibrates, making it difficult to put it into practical use. However, in order to uniformly process a large area, a linearly arranged nozzle cartridge is required.
This is more effective than the circular nozzle cartridge shown in the figure. SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an injection gun that does not rotate at all even in the case of a long and narrow nozzle cartridge, but only revolves and does not cause vibration.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a small-diameter revolution shaft inserted at an eccentric position within the rotation shaft horizontally suspended within the housing, and one end of the revolution shaft placed outside the housing. In an injection gun having a protruding nozzle or a nozzle cartridge, a drive shaft parallel to the rotation axis is horizontally mounted in the housing, and a rotation rate per revolution of the rotation axis is provided between the drive shaft and the rotation axis and the revolution axis. , is characterized by incorporating a gear train that allows the revolution axis to revolve once without rotating.

More specifically, a driven gear is provided on the outer periphery of the rotating shaft, the driven gear is meshed with the first driving gear of the drive shaft, the internal gear is rotatably supported at the end of the rotating shaft, and the internal gear is meshed with the revolving gear. An external gear is meshed with a second drive gear on the drive shaft to form a gear train, and the number of teeth of the first drive gear, driven gear, revolution gear, internal/external gear, and second drive gear is When n ₁ , n ₂ , n ₃ , n ₄ , n ₅ , n ₆ , there is a relationship between each number of teeth: 1-n ₃ /n ₄ = n ₂ /n ₁・n ₆ /n ₅ It is characterized by this.

[Operation] When ultra-high pressure water is supplied from an ultra-high pressure hose to the nozzle cartridge while the drive shaft is rotating, the revolution axis rotates once without rotating within the rotation axis, so the nozzle car Toritsuji can perform ultra-high pressure water jet processing with high efficiency without causing vibrations due to rotation.

[Example] Next, the present invention will be specifically described based on the drawings.

FIG. 1 is a longitudinal sectional view of the ultra-high pressure water injection gun of the present invention, and FIG. 2 is a partially cutaway front view.

The illustrated example shows a case where the housing 10 is of a fixed type.
A nozzle cartridge 11 is attached to one side of the casing 10, and a hose protection pipe body 12 and a motor mounting bracket 13 are fixed to the other side, and a drive shaft 1 and a rotating shaft 2 are rotatably supported within the casing. . First and second drive gears A and F are fixed to a drive shaft 1, and the end shaft is coupled to an output shaft 16 of a motor 15 via a coupling 14. The rotation shaft 2 has a relatively large diameter and is horizontally suspended above the drive shaft 1 in parallel, and a revolution shaft 3 is inserted therein at an eccentric position (eccentricity e). A small-diameter water conduit 4 is formed inside the revolution shaft 3, one end of which communicates with a nozzle cartridge 11 fixed to the entire housing 10, and the other end connected to an ultra-high pressure hose 6 via a joint 5. . As shown in FIG. 2, the nozzle cartridges 11 are arranged in two linear rows.
It also has a large number of nozzles 18 arranged in a staggered manner.

Between the drive shaft 1, the rotation axis 2, and the revolution axis 3,
1 rotation of the rotation axis 2 without rotating the revolution axis 3
It has a built-in gear train that rotates it. That is,
A balance weight 7 is fixed to one end of the rotating shaft 2, while internal and external gears D and E are rotatably supported at the other end. The external gear E meshes with the second drive gear F, and the internal gear D meshes with the revolution gear C fixed to the revolution shaft 3.

FIG. 4 is a skeletal vertical cross-sectional view drawn to make the gear train easier to understand, and FIGS. 5 and 6 are cross-sectional front views taken along the - line and - line in FIG. 4, respectively. As is clear from this, the first
The drive gear A and the driven gear B are a simple spur gear train, but the revolution gear C to the second drive gear F are a planetary differential gear train.

Figure 5 shows a cross section of the meshing of the first driving gear A (number of teeth n ₁ ) and driven gear B (number of teeth n ₂ ), and the drive shaft 1 rotates in the positive direction around O ₁ . Then, the rotating shaft 2 integrated with the driven gear B becomes
The center O ₃ of the revolution shaft ₃ , which rotates in the negative direction around O 2 and is provided inside the rotation shaft 2, revolves around O ₂ as a revolution orbit in a circle whose radius is the amount of eccentricity e.

A revolving gear C (number of teeth n ₃ ) is attached to one end of the revolving shaft, and FIG. 6 shows a cross section of the meshing of the revolving gear C. In other words, since the revolving gear C meshes with the internal gear D (number of teeth n ₄ ), if the internal gear D does not rotate at all with respect to the housing 10, the revolving gear C will be in the correct position during one revolution around the orbit. It will rotate only n ₄ /n ₃ −1 ...(1) times in the direction. However, in reality, as shown in FIG. 6, the external gear E (number of teeth n ₅ ) integrated with the internal gear D is connected via the drive shaft 1 and the second drive gear F (number of teeth n ₆ ). Since it is rotating in the negative direction, the revolution gear C is also rotating in the negative direction. When calculating the number of rotations, when the rotation axis 2 makes -1 rotation and the revolution gear C makes -1 revolution on the orbit, the drive shaft 1 makes n ₂ /n ₁ rotation according to FIG.
As shown in the figure, the revolving gear C rotates only -n ₂ /n ₁ ·n ₆ /n ₅ ·n ₄ /n ₃ ...(2) times. In the end, the rotation of the revolution gear C with respect to the casing 10 becomes the rotation speed obtained by adding the equation (1) and the equation (2).

Therefore, if 1-n ₃ /n ₄ = n ₂ /n ₁・n ₆ /n ₅ , the revolution gear C does not rotate at all with respect to the casing, and neither the revolution axis 3 nor the nozzle cartridge rotates at all. It can revolve without rotating.

In the embodiment shown in FIG. 1, a water conduit 4 is provided inside the revolution shaft 3, and ultra-high pressure water is fed from an ultra-high pressure hose connected to the water conduit 4 to the nozzle cartridge 11 through the water conduit 4. It is also possible to connect the ultra-high pressure hose 6 directly to the nozzle cartridge 11 that revolves as shown in FIG.

Figures 1, 2, and 7 are all for the case 1.
0 is fixed, but if the housing is made portable, it goes without saying that it can be used as is as a hand-held injection gun.

FIG. 3 shows a nozzle cartridge 1 in which a plurality of nozzles 18 are arranged in two straight lines and arranged in a staggered pattern.
1 is shown. With this arrangement, the high-pressure water injection gun can be operated at low speed as shown by the arrow in the same figure.
By moving in one direction, the orbits 30 of each nozzle overlap, and as a result, the surface of the object can be processed without any gaps.

[Effects of the Invention] As described above, the present invention provides a gear train between the drive shaft, the rotation axis, and the revolution shaft rotatably installed at an eccentric position within the rotation axis. Each revolution allows the revolution axis to revolve once without rotating, so when injecting ultra-high pressure water from the nozzle cartridge of various shapes installed at the tip of the revolution axis,
No vibration occurs due to rotation.

[Brief explanation of drawings]

Fig. 1 is a vertical side view of the ultra-high pressure water injection gun of the present invention, Fig. 2 is a front view thereof, Fig. 3 is an enlarged front view of the nozzle cartridge, and Fig. 4 is a skeletal side view of the gear train of the present invention. Figure 5 is the − of Figure 4.
6 is a sectional view taken along the - line in FIG. 4, FIG. 7 is a partially longitudinal side view of a modified embodiment, and FIG. 8 is a partially longitudinal side view of a conventional ultra-high pressure water injection gun. , 9 and 10 are front views of conventional nozzle cartridges. 1... Drive axis, 2... Rotation axis, 3... Revolution axis,
4...Conduit, 5...Joint, 6...Ultra high pressure hose, 10...Housing, 11...Nozzle cartridge, 14...Coupling, 15...Motor, A
...First drive gear, B...Followed gear, C...Revolutionary gear, D...Internal gear, E...External gear, F...Second drive gear.

Claims (1)

[Scope of Claims] 1. An injection gun in which a small-diameter revolving shaft is inserted at an eccentric position within a rotating shaft horizontally suspended within a housing, and a nozzle or nozzle cartridge is attached with one end of the revolving shaft protruding outside the housing. A gear train in which a drive shaft parallel to the rotation axis is horizontally mounted in the housing, and the drive shaft rotates once per revolution of the rotation axis without rotating the rotation axis, between the drive shaft and the rotation axis and the revolution axis. An ultra-high pressure water injection gun that incorporates a 2. A relatively large-diameter rotating shaft suspended horizontally within the housing;
A revolving shaft that is rotatably installed at an eccentric position within the rotating shaft and has a water conduit inside; a nozzle cartridge attached to one end of the revolving shaft that protrudes outside the casing; and a nozzle cartridge attached to the other end of the revolving shaft. an attached revolving gear; a drive shaft horizontally suspended parallel to the lower part of the rotation axis; first and second drive gears provided on the drive shaft; and the first drive gear formed on the outer periphery of the rotation axis. an internal gear that is rotatably supported on the end of the rotating shaft and that meshes with the revolving gear; an external gear that is formed on the outer periphery of the internal gear and that meshes with the second driving gear; The number of teeth of the first drive gear, driven gear, revolution gear, internal/external gear, and second drive gear.
When n ₁ , n ₂ , n ₃ , n ₄ , n ₅ , n ₆ , there is a relationship between each number of teeth: 1-n ₃ /n ₄ = n ₂ /n ₁・n ₆ /n ₅ An ultra-high pressure water injection gun according to claim 1, characterized in that: 3. The ultra-high pressure water injection gun according to claim 1 or 2, wherein the rotation axis has a balance weight of an amount approximately corresponding to the eccentric revolution of the nozzle cartridge. 4. The ultra-high pressure water injection gun according to claim 1 or 2, wherein the revolving shaft has a small diameter water conduit for feeding ultra-high pressure water from the ultra-high pressure hose to the nozzle or nozzle cartridge. . 5. The ultra-high pressure water injection gun according to claim 1, wherein the nozzle cartridge has an ultra-high pressure hose attached to the back wall. 6. The ultra-high pressure water injection gun according to claim 1 or 2, wherein the nozzle cartridge has a large number of nozzles arranged in multiple linear rows in a staggered pattern. 7. The ultra-high pressure water injection gun according to claim 1 or 2, wherein the casing is of a fixed type. 8. The ultra-high pressure water injection gun according to claim 1 or 2, wherein the housing is hand-held.