CN1066101A - Helically internal rotating ball pneumatic rock drill - Google Patents
Helically internal rotating ball pneumatic rock drill Download PDFInfo
- Publication number
- CN1066101A CN1066101A CN 92102598 CN92102598A CN1066101A CN 1066101 A CN1066101 A CN 1066101A CN 92102598 CN92102598 CN 92102598 CN 92102598 A CN92102598 A CN 92102598A CN 1066101 A CN1066101 A CN 1066101A
- Authority
- CN
- China
- Prior art keywords
- nut
- tooth
- helical tooth
- rifle
- ball
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Earth Drilling (AREA)
Abstract
A kind of helically internal rotating ball pneumatic rock drill.Be characterized between the helical tooth of big helical pitch screw mechanism and tooth, filling the standard ball, and install back pearl cover plate and jam nut at the rifle nut two ends, its rifle nut axial length is less than the lead of helix, ball circulates around the rifle nut tooth during work, reach and cut down the consumption of energy, improve the purpose of moment of torsion, compare with energy consumption slip screw hammer drill, can improve and change pricker moment of torsion 1-3 times of above, ballistic work 5%-10% with existing.The present invention simultaneously is simple in structure, easy to manufacture, particularly in replacing with minicomputer, large-scale computer Drilling deep hole, macropore more have good effect.
Description
The invention belongs to engineering machinery, relate to a kind of improved interior revolution pricker air rock drill specifically, particularly a kind of air rock drill that replaces the slip screw slew gear with the ball screw slew gear.
Existing air rock drill is divided into two types according to the interior revolution rotating drill rod mechanism structure that adopts is different: a kind of is the air rock drill with handle ratchet wheel rotating drill rod mechanism of independent rifle bar, as " the YT24 type air rock drill " of the Pneumatic Tools Factory production of setting a prairie fire, the rifle nut of the handle ratchet wheel rotating drill rod mechanism of this hammer drill is to be fastened in the piston head of hammer drill.Another kind is the outer ratchet rotating drill rod mechanism of no independent spiral rod, and as " YTP26 type air rock drill " that pneumatic machinery factory in Xiang Tan produces, the helicla flute of its rotating drill rod mechanism is out that on piston rod rifle nut then is to be fastened in the outer ratchet.These two types of hammer drill are when the piston impact stroke, and ratchet is in along the dentation attitude, and piston is done rectilinear motion, and rifle bar or rifle nut rotate.When the piston backstroke, ratchet is in contrary dentation attitude, props up rifle bar or outer ratchet, stops it to rotate, and piston is rotated along the hand of spiral of rifle bar or rifle nut, and drive turning set and hammer drill overcome the moment of resistance and turn an angle.Along with the increase in the rock drilling degree of depth or aperture, the moment of resistance increases thereupon, and card pricker accident easily takes place, and this just requires hammer drill to have big as far as possible moment of torsion, so that Drilling deep hole, macropore.Yet the screw mechanism of above-mentioned existing interior rotary rock drill is the slip screw auxiliary structure, and friction factor reaches 0.15, and energy loss is big, and moment of torsion can't further improve, and brings certain limitation for hammer drill Drilling performance.
The purpose of this invention is to provide and a kind ofly under the same consumption energy situation, can improve moment of torsion and overcome the helically internal rotating ball pneumatic rock drill of prior art deficiency.
Solution of the present invention replaces sliding friction with rolling friction and puts into practice and realize.
According to the interior revolution air rock drill torque arithmetic formula of listing:
M＝ 1/2 K
md
1FP
0t
g（α-ρ）
In the formula: M-moment of torsion (Nm)
K
m-torque correction factor
d
1-rifle bar average diameter (m)
Alpha-helix line lift angle (degree)
(α is 84～85.5 ° generally speaking)
The L-lead of helix (m)
ρ-screw pair angle of friction (degree)
The friction factor of μ-screw pair material
Check in: the friction coefficient mu of copper Ma Gang=0.15 ρ=8.53 °
The coefficient of rolling friction μ of steel ball=0.006 ρ=0.34 °
P
0Use blast (the MP of-hammer drill
a)
Effective compression area (the m of piston during the F-backhaul
2)
F＝ (π)/4 （D
2-d
2）
D-piston diameter (m)
D-diameter of piston rod (m)
By formula as can be known, K
m, d
1, F, P
0, α be numerical invariant, and the ρ in the formula is a friction parameter for the hammer drill that certain same air compressor machine drives, and is variable, and ρ reduces, and then moment of torsion M increases.So concrete solution of the present invention is to process helicla flute at the piston middle part, is non-independent rifle bar; Process the helicla flute of identical lift angle outside in the ratchet (or whole or combination), be non-independent rifle nut, between the tooth of the tooth of rifle nut and rifle bar, fill ball, install back the pearl cover plate at the rifle nut two ends.When piston (rifle bar) when doing axially-movable, outer ratchet (rifle nut) is made (along the dentation attitude) or does not make (contrary dentation attitude) to rotatablely move, and ball then circulates around the rifle nut tooth, has realized the purpose with rolling friction replacement sliding friction.The present invention compared with prior art has: one, special ball spiral pair, have now and be applied to the axial length of the ball screw mother in the various plant equipment greater than the lead of helix, the present invention's ball screw mother's axial length is less than the lead of helix, shown in accompanying drawing 2,4; Two, simple in structure, easy to manufacture, and under same energy consumption situation, because of the screw pair friction factor drops to 0.006 by 0.15, make hammer drill that the present invention constitutes can improve than the hammer drill of existing slip screw bar structure that moment of torsion 1-3 is doubly above, ballistic work 5%-10%, this and in replacing with minicomputer, all has good effect on the meaning of large-scale computer Drilling deep hole, macropore not only on energy-saving significance.
Concrete structure of the present invention is provided by following examples and accompanying drawing.
Fig. 1 is a structure general assembly drawing of the present invention
Fig. 2 is a ball screw structure chart of the present invention
Fig. 3 is the sectional view of Fig. 2 along I-I line
Fig. 4 is the sectional view of Fig. 3 along II-II line
With reference to accompanying drawing, the helically internal rotating ball pneumatic rock drill among the embodiment comprises handle body and air distribution system 11, cylinder 12, and ball screw mechanism 13, fairlead 14, head 15, turning set 16, pricker card system 17, interstage sleeve 18, exhaust system 19 members such as grade are formed.Wherein ball screw mechanism 13 comprises: piston 1, and piston head 2, big piston bar 3, small piston rod 4, outer ratchet rifle nut 5, last time, the pearl cover plate 6, and the pearl cover plate 7 next time, last jam nut 8, following jam nut 9, ball 10.
With reference to accompanying drawing 2, piston 1 is by piston head 2, big piston bar 3 and small piston rod 4 are formed, have some helicla flutes 31 and helical tooth 32 on the big piston bar 3, its axial length and lift angle should be according to changeing the fillet degree, the total length of the stroke of piston and rifle nut, upper and lower time pearl cover plate, upper and lower jam nut is determined, has some straight-tooth pattern chain grooves on the small piston rod 4.
With reference to Fig. 3, axial length is made up of outer ratchet 51 and rifle nut 52 less than the outer ratchet rifle nut 5 of helical pitch, and outer ratchet 51 also can be processed into integral body with rifle nut 52.Ratchet 51 outer round surface have hook tooth 511 outside, have and big piston bar 3 helicla flutes 31 at rifle nut 52 internal circular surfaces, the helicla flute 521 of helical tooth 32 similar numbers and lift angle and helical tooth 522, outer ratchet rifle nut 5 is sleeved on the big piston bar 3, helicla flute 521 and helical tooth 522 correspond respectively to the helical tooth 32 and the helicla flute 31 of big piston bar 3, the diameter dimension that circular gap between helicla flute 521 and helical tooth 32 or helical tooth 522 and the helicla flute 31 equals 2 times of balls 10 adds play again, the minimum diameter size that the maximum outside diameter size of big piston bar 3 is greater than rifle nut 52 adds the diameter dimension of 2 times of balls 10, and the maximum inner diameter size that the minimum outer diameter size of big piston bar 3 is less than rifle nut 52 deducts the diameter dimension of 2 times of balls 10.
Accompanying drawing 4 can be found out the structure of a helical tooth that has one group of ball.With reference to accompanying drawing 4, ball 10 is filled between the helical tooth 32 of the helical tooth 522 of rifle nut 52 and big piston bar 3, upper and lower time pearl cover plate 6,7 is installed in two end faces of rifle nut 52 respectively, be provided with and the helical tooth 522 identical rotation directions of rifle nut and the tooth 61,71 of the identical number of teeth in the upper and lower time pearl cover plate 6,7, and the diameter dimension that lid tooth 61, the 71 surperficial arc radius arc radius size that is of a size of the helical tooth 522 of rifle nut adds ball 10 adds play again.Go back to pearl cover plate 6,7 outsides and use, descend jam nut 8,9 to be locked on the outer ratchet 51, the thread rotary orientation of wherein going up jam nut 8 is identical with the hand of spiral of big piston bar 3, and the thread rotary orientation of the following jam nut 9 then hand of spiral with big piston bar 3 is opposite.
Press the helically internal rotating ball pneumatic rock drill that embodiment constitutes, the friction factor of its screw mechanism is little, improved sealing performance because of no independent spiral rod simultaneously, increased the effective active area of piston, it is compared with revolution air rock drill in the slip screw of same energy consumption, not only change the pricker moment of torsion improved 1-3 doubly more than, and the ballistic work of piston also improved 5%-10%, thereby improved rock penetration performance.
Claims (4)
1, a kind of helically internal rotating ball pneumatic rock drill comprises handle body and air distribution system (11), cylinder (12), ball screw mechanism (13), fairlead (14), head (15), turning set (16), pricker card system (17), interstage sleeve (18), exhaust system (19), it is characterized in that ball screw mechanism (13) also comprises piston (1), outer ratchet rifle nut (5), on, pearl cover plate (6) next time, (7), on, following jam nut (8), (9), ball (10), piston (1) is by piston head (2), be shaped on the big piston bar (3) of helicla flute (31) and helical tooth (32), the small piston rod (4) that is shaped on the straight-tooth spline is formed, ratchet (51) outer round surface has hook tooth (511) outside, have and big piston bar (3) helicla flute (31) at rifle nut (52) internal circular surfaces, the helicla flute (521) of helical tooth (32) similar number and lift angle, helical tooth (522), outer ratchet rifle nut (5) is sleeved on the big piston bar (3), helicla flute (521) and helical tooth (522) correspond respectively to the helical tooth (32) and the helicla flute (31) of big piston bar (3), ball (10) is filled between the helical tooth (32) of the helical tooth (522) of rifle nut (52) and big piston bar (3), on, pearl cover plate (6) next time, (7) be installed in two end faces of rifle nut (52) respectively, last, pearl cover plate (6) next time, (7) outside is by last, following jam nut (8), (9) be locked on the outer ratchet (51).
2, hammer drill according to claim 1, it is characterized in that pearl cover plate last time (6), pearl cover plate (7) has and rifle nut (52) equal number next time, identical rotation direction, the lid tooth (61) of identical lift angle, (71), lid tooth (61), (71) the surperficial arc radius arc radius size that is of a size of the helical tooth (522) of rifle nut (52) diameter dimension that adds ball (10) adds play again, the thread rotary orientation of last jam nut (8) is identical with the hand of spiral of big piston bar (3), and the thread rotary orientation of following jam nut (9) is opposite with the hand of spiral of big piston bar (3).
3, hammer drill according to claim 1 is characterized in that the maximum outside diameter size of big piston bar (3) adds the diameter dimension of 2 times of balls (10) greater than rifle nut (52) minimum diameter size.
4, hammer drill according to claim 1 is characterized in that the helical tooth (522) of rifle nut (52) and the diameter dimension that the circular gap between the helical tooth (32) on the big piston bar (3) equals 2 times of balls (10) add play again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102598 CN1066101A (en) | 1992-04-10 | 1992-04-10 | Helically internal rotating ball pneumatic rock drill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92102598 CN1066101A (en) | 1992-04-10 | 1992-04-10 | Helically internal rotating ball pneumatic rock drill |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1066101A true CN1066101A (en) | 1992-11-11 |
Family
ID=4939750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92102598 Pending CN1066101A (en) | 1992-04-10 | 1992-04-10 | Helically internal rotating ball pneumatic rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1066101A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101283501B (en) * | 2005-08-31 | 2010-08-11 | Thk株式会社 | Micro actuator |
| CN101253672B (en) * | 2005-08-31 | 2010-12-08 | Thk株式会社 | Linear motor |
| CN101694147B (en) * | 2009-10-17 | 2011-11-16 | 中北大学 | High water-based hydraulic rock drill |
-
1992
- 1992-04-10 CN CN 92102598 patent/CN1066101A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101283501B (en) * | 2005-08-31 | 2010-08-11 | Thk株式会社 | Micro actuator |
| CN101253672B (en) * | 2005-08-31 | 2010-12-08 | Thk株式会社 | Linear motor |
| US8143750B2 (en) | 2005-08-31 | 2012-03-27 | Thk Co., Ltd. | Linear motor having coils surrounding an axially moving magnetic rod |
| CN101694147B (en) * | 2009-10-17 | 2011-11-16 | 中北大学 | High water-based hydraulic rock drill |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105927170B (en) | Drilling machine and its adjustment mechanism | |
| CN1605438A (en) | Hand machine tool with an impact mechanism | |
| DE2252951B2 (en) | Hammer drill | |
| CN1782445A (en) | Stepped shaft | |
| CN1283423C (en) | Portable tool machine | |
| US4881419A (en) | Fluid-power bearing actuator | |
| CN1764769A (en) | Gerotor mechanism for a screw hydraulic machine | |
| CN1066101A (en) | Helically internal rotating ball pneumatic rock drill | |
| CN205315617U (en) | Ball worm reducer | |
| DE3116851C2 (en) | ||
| CN107775327A (en) | A kind of hand-held screwing device | |
| DE202020100365U1 (en) | Drive device for generating an impact in rotating tools | |
| EP2132005A1 (en) | Rotary percussion mechanism | |
| CN1849471A (en) | Ball screw nut and method of producing the same | |
| CN1376245A (en) | Speed change control device for a continuously variable transmission | |
| CN1899769A (en) | Moving wheel two-way impulse type electric and pneumatic spanner working mechanism | |
| CN200952464Y (en) | Planetary automatic balancing beam-pumping unit | |
| CN201970252U (en) | Torsion limit hitting mechanism of pneumatic impact wrench | |
| CN209668195U (en) | A kind of double rail type cam bawl slide unit | |
| CN2291267Y (en) | High-efficiency percussion arrangement of eccectric slide electric drill | |
| CN2174300Y (en) | Clutch for electric screwdriver | |
| CN2086793U (en) | Externally turned rock-drill unit for hydraulic quarrying machine | |
| CN2715893Y (en) | Automatic feed apparatus for lathe boring | |
| JPS6044661A (en) | Screw gear and machining device of screw gear | |
| CN2787931Y (en) | Axial reversing type ball screw pair |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |