CN202970434U

CN202970434U - Hydraulic rock drill

Info

Publication number: CN202970434U
Application number: CN 201220691742
Authority: CN
Inventors: 李田生
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-14
Filing date: 2012-12-14
Publication date: 2013-06-05
Anticipated expiration: 2022-12-14

Abstract

The utility model discloses a hydraulic rock drill. The hydraulic rock drill comprises a piston impactor and a shank rotator, and is characterized in that an oil control cavity of a valve core in the piston impactor is communicated with an oil control opening of a cylinder body through a straight oil passage; a high-pressure oil inlet is arranged and is respectively communicated with a valve body oil inlet cavity in the piston impactor and a piston front cavity in the piston impactor; and a bearing ring, a bearing and a seal ring are further arranged and are connected with a shank of the shank rotator. Because the oil passage of the interior of the piston impactor is the straight oil passage, the number of bent passages and calorific value are small, the rock drill with the structure has higher impacting frequencies, high temperature caused by heat generate by mutual friction of an impacting piston, the bearing and the sealing is solved. Because heat of a piston sealing ring can be taken away by return oil of the oil control cavity, sealing effect is guaranteed, the rock drill can be continuously used for a long time, work efficiency is improved, and energy consumption is low.

Description

Hydraulic gate

Technical field

The utility model relates to engineering machinery, particularly a kind of hydraulic gate.

Background technology

The operating principle of current hydraulic gate is all to utilize differential pressure action, forces impact piston to do to move back and forth at a high speed in cylinder body, to impact the drill steel fractured rock.Because piston is high speed impact motion under High Pressure, structural requirement to the forward and backward fairlead of sealing structure of cylinder and supporting piston motion is very high, impact piston, bit shank, fairlead material processed and requirement on machining accuracy are also very high, therefore caused current hydraulic gate manufacturing cost high, the working service cost is high.

The utility model content

The purpose of this utility model is for overcoming the deficiencies in the prior art, and provide a kind of hydraulic gate, the hammer drill of this structure has higher frequency of impact, solved the high temperature that heat that impact piston and supporting and the mutual friction of sealing phase produce causes, make the rock drilling function for a long time, work uninterruptedly, improved operating efficiency, and energy consumption is low.

The technical scheme that realizes the utility model purpose is:

A kind of hydraulic gate comprises piston striker and bit shank circulator, unlike the prior art be: the piston striker cylinder body first the control hydraulic fluid port communicate with spool control oil pocket by the first oil duct; The valve body oil suction chamber of piston striker communicates with cylinder after cylinder body by the second oil duct with oil back chamber, the first control hydraulic fluid port of cylinder body and the second control hydraulic fluid port communicate, be provided with the 4th oil duct and communicate with front joint ring, increasing back sealing ring, the first oil back chamber, the second oil back chamber and the 3rd oil duct, be provided with the hydraulic oil import and be communicated with valve body oil suction chamber, piston ante-chamber in piston striker respectively; Also being provided with Supporting ring, bearing, sealing mat is connected with the bit shank of bit shank circulator.

Also be provided with air inlet port and be communicated with the bit shank air vent between the water jacket of Supporting ring and bit shank circulator, the dust that bit shank is produced when work can directly blow out, and has avoided dust too much to affect operating efficiency.

The utility model has the advantages that:

1, the oil duct due to piston striker inside is straight oil duct, and bend is few, and heating is few, and piston packing ring can be walked heat by the spill strip of control oil pocket, guarantees sealing effectiveness, makes that the rock drilling function is long-time, the uninterrupted use continuously;

2, the clear bits air intlet in the bit shank circulator communicates with the bit shank air vent, has the most directly reduced the air duct transporting resistance, and the dust that bit shank is produced when work can directly blow out, and has avoided dust too much to affect operating efficiency;

3, bit shank is worked in Supporting ring, and the water jacket that do not wear and tear reduces maintenance cost;

4, sealing mat has the function of cushion pad, makes hammer drill have empty ability of beating; The end face of bit shank axle and the end face of bearing are made axial location, make overall structure simpler, reliable.

Description of drawings

Fig. 1 is the structural representation of piston striker in the utility model hydraulic gate;

Fig. 2 is the structural representation of bit shank circulator in the utility model hydraulic gate.

Figure: a piston cylinder impactor 1-1 1-2 1-3 before sealing piston ring seal ring 1-5 1-4 after the body . . . . . 1-6 1-7 drain chamber piston chamber before the first oil passage 1-9 1-8 second oil passage 1-10 third oil channel 1 . . . . - 11 The fourth oil passage 1-12. return hole 1-13. pressure oil imports 1-14. spool 1-15. valve into the oil chamber 1-16. valve body back to the oil chamber 1-17 first return oil chamber 1-18 second oil return chamber 1-19 first oil port 1-20. spool oil chamber 1 -21. cylinder rear chamber 1-22 second oil port 2. solder tail rotator 2-1. cabinet 2-2 cover 2-3. pinion 2-4 first bearing 2-5. driving shaft 2-6 cover 2-7 big gear 2-8 second bearing 2-9. solder tail shaft 2-10. horns 2-11. gasket 2-12. supporting ring 2-13. nuts 2-14. water jacket 2-15. solder tail 2 -16 hydraulic motor.

The specific embodiment

The utility model hydraulic gate is comprised of piston striker 1 and bit shank circulator 2, and the piston 1-1 of piston striker 1 is connected with the bit shank 2-15 of bit shank circulator 2.

with reference to Fig. 1, the piston 1-1 of piston striker 1 is installed in cylinder body 1-2, front joint ring 1-3 and increasing back sealing ring 1-4 are arranged on respectively on the front and back supporting arrangement of cylinder body 1-2, spool 1-14 is installed in valve body 1-5, hydraulic oil import 1-13 communicates with valve body oil suction chamber 1-15 and piston ante-chamber 1-7 respectively, the first oil duct 1-8 is communicated with the control oil pocket 1-20 of spool 1-14 and the first control hydraulic fluid port 1-19 of cylinder body 2, the second oil duct 1-9 is communicated with the oil back chamber 1-16 of valve body 1-5 and the back cavity 1-21 of cylinder body 1-2, the 4th oil duct 11 is communicated with the second control hydraulic fluid port 22 of cylinder body 2 and the oil suction chamber of front joint ring 1-3 and increasing back sealing ring 1-4, before the 3rd oil duct 1-10 is communicated with, the second oil back chamber 1-18 of the first oil back chamber 1-17 of joint ring 1-3 and increasing back sealing ring 1-4 and oil sump tank are taken over, spill port 1-12 communicates with valve body oil back chamber 1-16, and draining chamber 1-6 communicates with spill port 1-12 by the damping hole in spool 1-14.

With reference to Fig. 2, the upper case lid 2-2 that installs of the casing 2-1 of bit shank circulator 2 sequentially is equipped with water jacket 2-14, Supporting ring 2-12, sealing mat 2-11, parallels 2-10, bit shank axle 2-9 on bit shank 2-15; The upper gear wheel 2-7 that installs of bit shank axle 2-9, be combined together by the second bearing 2-8 and casing 2-1 and case lid 2-2, water jacket 2-14 is fixedly connected with by nut 2-13 with case lid 2-2, pinion 2-3, clutch shaft bearing 2-4 and end cap 2-6 are installed on driving shaft 2-5, and endoporus is connected with the axle of hydraulic motor 2-16.

During work, when hydraulic oil enters valve body oil suction chamber 1-15 from hydraulic oil import 1-13, promote spool 1-14 to moving to left, cylinder body back cavity 1-21 is communicated with the second oil duct 1-9, valve body oil back chamber 1-16, spill port 1-12, cylinder body ante-chamber 1-7 pushing piston 1-1 moves right simultaneously, when piston 1-1 moved right to certain distance, the first control hydraulic fluid port 1-19 of cylinder body 1-2 communicated with spool control oil pocket 1-20 by the first oil duct 1-8, promotes spool 1-14 and moves right; When spool 1-14 stops up spill port 1-12, valve body oil suction chamber 1-15 communicates with cylinder 1-21 after cylinder body by the second oil duct 1-9 with oil back chamber 1-16, and piston 1-1 is moved to the left under the hydraulic oil effect of back cavity 1-21.when piston 1-1 is moved to the left certain distance, the first control hydraulic fluid port 1-19 of cylinder body 1-2 and the second control hydraulic fluid port 1-22 communicate, due to the 4th oil duct 1-11 and front joint ring 1-3, increasing back sealing ring 1-4, the first oil back chamber 1-17, the second oil back chamber 1-18 and the 3rd oil duct 1-10 communicate, the pressure of valve body control oil pocket 1-20 is reduced to P0, spool 1-14 is moved to the left, cut off valve body oil suction chamber 1-15 and oil back chamber 1-16, open cylinder body back cavity 1-21 and spill port 1-12, at this moment because back cavity 1-2 oil pressure is reduced to P0, piston 1-1 is moved to the left under the effect of ante-chamber 1-7 hydraulic oil, the next circulation of beginning.

Claims

1. a hydraulic gate, comprise piston striker and bit shank circulator, it is characterized in that: the first control hydraulic fluid port of piston striker cylinder body communicates with spool control oil pocket by the first oil duct; The valve body oil suction chamber of piston striker communicates with cylinder after cylinder body by the second oil duct with oil back chamber, the first control hydraulic fluid port of cylinder body and the second control hydraulic fluid port communicate, be provided with the 4th oil duct and communicate with front joint ring, increasing back sealing ring, the first oil back chamber, the second oil back chamber and the 3rd oil duct, be provided with the hydraulic oil import and be communicated with valve body oil suction chamber, piston ante-chamber in piston striker respectively; Also being provided with Supporting ring, bearing, sealing mat is connected with the bit shank of bit shank circulator.

2. hydraulic gate according to claim 1 is characterized in that: also be provided with air inlet port and be communicated with the bit shank air vent between the water jacket of Supporting ring and bit shank circulator.