专利摘要:
A self-propelled pneumatically operated percussion boring apparatus for boring holes in the ground of the kind which includes a percussion piston which is reciprocated pneumatically in a tubular housing is provided with a control device for causing the apparatus to make either a forward movement or a return movement. The control device comprises a control sleeve which has air ports through its wall and over which a skirt of the piston passes as, in operation, the piston reciprocates. The skirt has ports which come into register with ports in the sleeve and the sleeve is fixed in position in the housing and has a control tube rotatably mounted within it. The control tube has one or more ports through its wall and compressd air for operating the apparatus is supplied through the control tube. The control tube is set in either one of two positions, in one of which the port or ports in the control tube are out of register with a port or ports in the sleeve and this causes the apparatus to move in one direction and in the second position the port or ports in the control tube are in register with the port or ports in the sleeve and this causes the apparatus to move in an opposite direction.
公开号:SU841577A3
申请号:SU772495171
申请日:1977-06-13
公开日:1981-06-23
发明作者:Шмидт Пауль
申请人:Schmidt Paul;
IPC主号:
专利说明:

The invention relates to impact properties and can be used in the construction, mining, mechanical engineering and other industries of the national economy. A spool device is known for forward and reverse strokes, with the spool sleeve being able to rotate in several working positions and abut against a guide ring provided with air inlet holes .ll. The main disadvantage of the spool device is that the control edges of the liner in the forward position, or reverse position, occupy an indeterminate position, hinder the passage of air. The closest to the proposed technical essence and the achieved result is a percussion device containing a cylindrical body, a working tool placed in it, a hammer-piston with a cavity from the side of the working tool, a spool sleeve with one radial through hole and with the other end entering the cavity of the piston, the collar, and the slide valve tube GZZ located in the sleeve. However, this impact device is not productive enough due to the complexity of the reversal, insufficient power and impact force. The purpose of the invention is to increase productivity. This goal is achieved by the fact that the piston-hammer is made with radial holes, and the spool tube - with through holes communicated with the holes of the sleeve, and is installed in the latter with the possibility of rotation around its axis. FIG. 1 shows a percussion device, a longitudinal section; in fig. 2 - the same, in a different working position; in fig. 3 shows section A-A in FIG. 1, the impactor comprises a cylindrical body 1, a working tool disposed therein (not shown), a hammer piston 2 with a skirt 3 and radial holes 4, a guide ring 5 with axial holes 6 and a tubular extension 7, in which radial ridges 8 strengthened the spool sleeve 9 with through radial holes
10 and 11. Between the bridges 8, axial grooves 12 are provided associated with the spool cavity 13. The bullet sleeve 9 has additional openings 14 which are periodically closed by the head 15 of the spool tube 16 with the stem 17 and the junction 18 between the stem 17 and the spool head U. the transition areas 18 are two diametrically located flashing 19, and in the head 15 of the spool tube 16 there are through holes 20 and 21. The corresponding part of the spool head 15 is made hollow and communicated with the cavity 22 of the piston of the impactor 2. Ic the tube 16 is made axial drilling 23, reaching the head 15, and to the rear end of it is connected the hose 24 of compressed air, going to a source of compressed air (not shown). To mount the hose 24 on the spool tube 16, a cap nut 25 serves,
The arresting of the rotational movement of the spool tube 16 is realized by a device 26 of the locking device consisting of a support ring 27 with holes 28 in which under the action of the springs 29 there are balls 30, which are part of their circumference and enter the recess of the end part of the guide ring 5 Due to the action of the springs 29 and the balls 30 projecting into the guide ring, the spool tube 16 is pressed to the right so that its shoulder 31 presses against the end of the tubular extension 7 of the guide ring 5. The rest of the spool tube 16 with its flange 3 2 adjacent to spool sleeve 9.
In the arresting device 26, there is a stopper 33, consisting of a radially protruding from the support ring 27 of the trunnion 34, and two protruding parallel to the axis of the guide ring 5 and spaced at an angle of about 90, stops 35 and 36.
The impactor works as follows.
In order to move forward, the air under pressure passes through axial drilling 23 into the head of the spool tube 15 and from there into cavity 22. Thus, the piston-hammer 2 in the cylindrical body 1 moves to the left. At the same time, the air is displaced from the front end of the impactor piston 2, passes through the annular space between the cylindrical body 1 and the outer surface, the impactor piston 2 reaches the radial holes 4 and the through holes 10 and
11 in the spool sleeve 9, and from there, through the axial grooves 12, air enters the spool cavity 13, from where it passes through the axial holes 6 in the guide ring 5 into the atmosphere - During forward movement
the air pressure acts on the end surface of the spool tube 16 and presses it with a shoulder 31 to the tubular extension 7 of the guide ring 5. The friction between the shoulder and the end of the tube thus prevents its spontaneous turning. At the same time, the springs 29 of the arresting device 26 act on the spool tube 16 in the same direction, so that the control during the forward stroke is held by the force of air pressure, the force of the springs 29, and also by adhesion of the pin 34 to the stop 36 of the guide ring 5.
To ensure the return stroke, the compressed air must be turned off for a short time so that the force of its pressure does not act on the slide tube 16, and the described friction between the slide tube 16 and the tube extension 7 has been removed. To rotate the spool tube 16, it is necessary to overcome only the return force of the springs 29 through the balls 30. After turning the spool tube 16 by about 90 ° and thus switching from direct to reverse, the pin 34 touches the second stop 35, while the arresting device 26 triggered again.
During the return stroke, the piston-hammer 2 moves to the guide ring 5. Due to the associated relative displacement of the piston-shock hammer .2 relative to the fixed spool sleeve 9, the through holes 11 in the slide sleeve 9 are blocked by the skirt 3 of the piston-shock hammer 2, while the additional the holes in the spool sleeve 14 and the holes in the spool head 21 are open. Air under pressure passes through axial drilling 23 into the head of the spool tube 15 and thus into the working volume 22, from where it can simultaneously enter the passage openings 21 and 14, which, however, are still initially blocked by skirt 3-impact-shock 2. Piston- The evaporator 2 therefore first moves to the left, and the air from its front end again through the annular gap between the cylindrical body 1 and the piston-impactor 2 enters the radial spool holes 4 which are now behind the spool sleeve 9, and thus One of the exhaust air passes through the spool cavity 13 and the axial holes 6 in the guide ring 5 and further into the atmosphere.
Performing the percussion device in the proposed manner greatly facilitates the reversal process, since to switch from direct to reverse or vice versa in the percussion device it is only necessary to turn the spool tube approximately
权利要求:
Claims (1)
[1]
Claim
An impact device comprising a cylindrical body, a working tool placed therein, a piston hammer with a cavity on the side of the working tool, a spool sleeve with radial through holes fixed at one end in the body, and a piston drum cavity entering the cavity, and a spool tube located in the sleeve, characterized in that. that, in order to increase productivity, the piston-hammer is made with radial holes, and the spool tube with through holes communicated with the holes of the sleeve, and installed in the latter with the possibility of rotation around its axis.
类似技术:
公开号 | 公开日 | 专利标题
SU841577A3|1981-06-23|Shocking device
US4084646A|1978-04-18|Fluid actuated impact tool
US4662457A|1987-05-05|Reversible underground piercing device
US4683960A|1987-08-04|Air-operated reversible percussive action machine
US5603383A|1997-02-18|Reversible pneumatic ground piercing tool
SU1250619A1|1986-08-15|Reversible pneumatic device for making holes in soil
US2922397A|1960-01-26|Adjustable stroke reciprocatory fluid pressure motor
US2778605A|1957-01-22|Rock drill
US2699153A|1955-01-11|Reversing valve mechanism
JPH09165986A|1997-06-24|Self-driving type ram drilling device
US5318135A|1994-06-07|Soil displacement hammer with reversing mechanism
US3164214A|1965-01-05|Rock drill
US3614912A|1971-10-26|Telescoping piston central lock hydraulic actuator
US3853036A|1974-12-10|Reciprocating fluid motor
US4207801A|1980-06-17|Hydraulic oscillatory devices
US1440082A|1922-12-26|Fluid-actuated hammer
US4170924A|1979-10-16|Hydraulically powered percussive apparatus
JPH11166506A|1999-06-22|Fluid pressure cylinder
US2556481A|1951-06-12|Hydraulic jack
US3800662A|1974-04-02|Fluid operated reciprocating motor
SU969515A1|1982-10-30|Pneumatic nailing machine
US3017862A|1962-01-23|Control valve assembly for fluid operated systems
SU109809A1|1956-11-30|High frequency drill
US2511827A|1950-06-20|Hydraulic steady rest chuck
US3547006A|1970-12-15|Variable stroke percussion tool
同族专利:
公开号 | 公开日
ATA474877A|1979-02-15|
DK147647C|1985-05-06|
IT1078877B|1985-05-08|
FR2359939A1|1978-02-24|
SE7708664L|1978-01-30|
DK340677A|1978-01-30|
GB1567343A|1980-05-14|
FR2359939B1|1982-10-08|
DE2634066B2|1980-10-16|
CH621384A5|1981-01-30|
US4221157A|1980-09-09|
DE2634066C3|1984-09-20|
AT352053B|1979-08-27|
DE2634066A1|1978-02-02|
NL183876C|1989-02-16|
NL183876B|1988-09-16|
JPS5318209A|1978-02-20|
SE429828B|1983-10-03|
BE857257A|1977-11-14|
JPS5624757B2|1981-06-08|
ES459816A1|1978-04-01|
DK147647B|1984-10-29|
NL7706143A|1978-01-31|
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法律状态:
优先权:
申请号 | 申请日 | 专利标题
DE19762634066|DE2634066C3|1976-07-29|1976-07-29|Device for the forward and reverse movement of self-propelled, pneumatic ram drilling rigs|
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