CN217898619U

CN217898619U - Multistage buffer device for hydraulic rock drill

Info

Publication number: CN217898619U
Application number: CN202221857321.XU
Authority: CN
Inventors: 耿腾飞; 杜丹丹; 耿得金; 胡小凯; 耿康康
Original assignee: Luoyang Tengwei Mining Equipment Co ltd
Current assignee: Luoyang Tengwei Mining Equipment Co ltd
Priority date: 2022-07-19
Filing date: 2022-07-19
Publication date: 2022-11-25
Anticipated expiration: 2032-07-19

Abstract

The utility model discloses a multistage buffer for hydraulic rock drill, including casing, piston, the casing middle part is provided with the first cavity and the second cavity that are linked together, the piston is coaxial to have set gradually big shaft shoulder and little shaft shoulder to big shaft shoulder and little shaft shoulder link to each other, big shaft shoulder and little shaft shoulder follow the piston and move in first cavity and second cavity, big shaft shoulder and little shaft shoulder respectively with first cavity and second cavity adaptation, can contact the buffering subassembly when little shaft shoulder moves to in the second cavity, all be provided with the buffering subassembly in first cavity and the second cavity; the buffer component mainly comprises a first annular blocking piece, a second annular blocking piece, a first spring, a retarding box, a retarding block and a second spring. The utility model discloses a measure of multiple buffering to adopt not keep off with the first cyclic annular of piston contact and keep off the piece with the second cyclic annular, avoid the friction life-span that reduces.

Description

Multistage buffer device for hydraulic rock drill

Technical Field

The utility model relates to a rock drill equipment technical field especially relates to a hydraulic rock drill is with multistage buffer.

Background

A rock drill is a tool for directly exploiting stone, which drills a blast hole on a rock layer to put explosive to explode the rock, thereby completing the exploitation of stone or other stone engineering.

As shown in patent document CN207920601U, it employs multiple buffering to buffer the piston, but the baffle plate and the piston will rub to affect the life of the two.

Disclosure of Invention

The utility model aims at providing a hydraulic pressure is multistage buffer for rock drill in order to solve above-mentioned problem, adopt the measure of multiple buffering to adopt not keep off with the first cyclic annular of piston contact and the cyclic annular fender piece of second, avoid the friction to reduce the life-span.

The utility model discloses a following technical scheme realizes above-mentioned purpose:

a multistage buffering device for a hydraulic rock drill comprises a machine shell and a piston, wherein a first cavity and a second cavity which are communicated with each other are arranged in the middle of the machine shell, a large shaft shoulder and a small shaft shoulder are coaxially and sequentially arranged on the piston and are connected with each other, the large shaft shoulder and the small shaft shoulder move in the first cavity and the second cavity along with the piston, the large shaft shoulder and the small shaft shoulder are respectively matched with the first cavity and the second cavity, the small shaft shoulder can contact with a buffering component when moving into the second cavity, and the first cavity and the second cavity are internally provided with buffering components; the buffer component mainly comprises a first annular blocking piece, a second annular blocking piece, a first spring, a retarding box, a retarding block and a second spring, wherein the first annular blocking piece is respectively fixed in a first cavity and a second cavity, the first annular blocking piece is in sliding fit with the second annular blocking piece, the second annular blocking piece is respectively in sliding fit with the inner walls of the first cavity and the second cavity, a cavity is formed between the first annular blocking piece and the second annular blocking piece, the first spring is arranged in the cavity, the retarding box is arranged on the outer wall of the machine shell and is communicated with the cavity through an oil channel, a through hole is formed in one end, away from the machine shell, of the retarding box, the retarding block is in sliding fit in the retarding box, the second spring is arranged between the retarding block and the end of the through hole in the retarding box, and a large shaft shoulder and a small shaft shoulder on the piston slide in the first cavity, when the small shaft shoulder is close to and extrudes the first annular blocking piece in the second cavity or the large shaft shoulder is close to and extrudes the first annular blocking piece in the first cavity, the first annular blocking piece is pressed to deviate, a first spring is arranged inside the first annular blocking piece and the second annular blocking piece and is compressed for primary buffering of the piston, retarded oil in a cavity formed between the first annular blocking piece and the second annular blocking piece slowly enters the retarding box from the oil liquid channel, the retarding block is further pushed to extrude the second spring, the second spring accumulates force for secondary buffering, when external force is withdrawn, the second spring in the retarding box pushes the retarding block, the retarded oil in the retarding box is pushed into the cavity formed by the first annular blocking piece and the second annular blocking piece again, and meanwhile, the first spring also pushes the first annular blocking piece.

Preferably, one side of the first annular stopper, which is in contact with the large shaft shoulder or the small shaft shoulder, is provided with a rubber pad, and at the moment, the large shaft shoulder or the small shaft shoulder firstly impacts the rubber pad, and the rubber pad can be used as primary buffer.

Preferably, the retardant box outer wall is fixed with the installation ear that is used for being connected with the casing, and the mounting hole has been seted up to the installation ear, and the casing outer wall is seted up the screw that corresponds with the mounting hole, passes the mounting hole through the fastener and can fix the installation ear on the casing outer wall, and then the fixed retardant box.

Preferably, a dust screen is arranged in the through hole, and the through hole is used for blocking air pressure leakage when the block is displaced.

The utility model provides a technical scheme can include following beneficial effect:

the utility model discloses a big shoulder and little shoulder on the piston slide in first cavity, when little shoulder is close to and extrudees the first cyclic annular fender spare in the second cavity or big shoulder is close to and extrudees the first cyclic annular fender spare in the first cavity, first cyclic annular fender spare pressurized excursion, big shoulder or little shoulder at this moment strike the rubber pad at first, the rubber pad can be as preliminary buffering, first spring compressed and be used for the one-level buffering of piston is set up inside first cyclic annular fender spare and the second cyclic annular fender spare, the retardation oil in the cavity that forms between first cyclic annular fender spare and the second cyclic annular fender spare slowly enters into the retardation box from the fluid passageway, and then promote the retardation piece and extrude the second spring, the second spring holds power, be used for the second grade buffering, second spring in the retardation box promotes the retardation piece when external force withdraws, push the retardation oil in the retardation box again in the cavity that first cyclic annular fender spare and the second cyclic annular fender spare formed, simultaneously first spring also promotes first cyclic annular fender spare, to sum up can, the utility model discloses a multiple buffering has been set up, the problem of avoiding the rock drill sleeve damage when having solved the piston and having avoided the first cyclic annular fender spare and the first cyclic annular piston to have taken place the life with the annular friction.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic sectional structure of the present invention;

FIG. 2 is a schematic view of the inner structure of the retardation box of the present invention;

FIG. 3 is a schematic view of the structure of the retardation box of the present invention;

fig. 4 is a schematic structural view of the annular stopper of the present invention.

The reference numerals are illustrated below:

1. a housing; 2. a piston; 3. a first cavity; 4. a second cavity; 5. a large shaft shoulder; 6. a small shaft shoulder; 7. a first annular stopper; 8. a second annular stop; 9. a first spring; 10. an oil passage; 11. a retardation cassette; 12. a through hole; 13. a retardation block; 14. a second spring; 15. a rubber pad; 16. and (7) installing ears.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the attached fig. 1, and are only for convenience of description of the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

As shown in fig. 1-4, a multistage buffering device for a hydraulic rock drill comprises a machine shell 1 and a piston 2, wherein a first cavity 3 and a second cavity 4 which are communicated with each other are arranged in the middle of the machine shell 1, the piston 2 is coaxially and sequentially provided with a large shaft shoulder 5 and a small shaft shoulder 6, the large shaft shoulder 5 is connected with the small shaft shoulder 6, the large shaft shoulder 5 and the small shaft shoulder 6 move in the first cavity 3 and the second cavity 4 along with the piston 2, the large shaft shoulder 5 and the small shaft shoulder 6 are respectively matched with the first cavity 3 and the second cavity 4, the small shaft shoulder 6 can contact a buffering component when moving into the second cavity 4, and the first cavity 3 and the second cavity 4 are both provided with buffering components; the buffer component mainly comprises a first annular blocking piece 7, a second annular blocking piece 8, a first spring 9, a retarding box 11, a retarding block 13 and a second spring 14, wherein the first annular blocking piece 7 is respectively fixed in the first cavity 3 and the second cavity 4, the first annular blocking piece 7 is in sliding fit with the second annular blocking piece 8, the second annular blocking piece 8 is respectively in sliding fit with the inner walls of the first cavity 3 and the second cavity 4, the first annular blocking piece 7 and the second annular blocking piece 8 are annular plates with flanges, the flanges are in sliding fit with each other, a cavity is formed between the first annular blocking piece 7 and the second annular blocking piece 8, the first spring 9 is arranged in the cavity, the retarding box 11 is arranged on the outer wall of the machine shell 1, the retarding box 11 is communicated with the cavity through an oil passage 10, a through hole 12 is formed in one end of the retarding box 11, the retarding block 13 is in sliding fit with the retarding box 11, the second spring 14 is arranged between the retarding block 13 and the through hole 12 in the retarding box 11, the large shaft shoulder 5 and the small shaft shoulder 6 on the piston 2 slide in the first cavity 3, when the small shaft shoulder 6 approaches and extrudes the first annular blocking piece 7 in the second cavity 4 or the large shaft shoulder 5 approaches and extrudes the first annular blocking piece 7 in the first cavity 3, the first annular blocking piece 7 is pressed to deflect, the first spring 9 is arranged inside the first annular blocking piece 7 and the second annular blocking piece 8 and is compressed for primary buffering of the piston 2, the blocking oil in the cavity formed between the first annular blocking piece 7 and the second annular blocking piece 8 slowly enters the blocking box 11 from the oil passage 10, the blocking block 13 is further pushed to extrude the second spring 14, the second spring 14 is accumulated for secondary buffering, when external force is withdrawn, the second spring 14 in the blocking box 11 pushes the blocking piece 13, and pushes the blocking oil in the blocking box 11 into the cavity formed by the first annular blocking piece 7 and the second annular blocking piece 8 again In the chamber, the first spring 9 also pushes the first annular stop 7.

Further, one surface of the first annular stopper 7 contacting the large shaft shoulder 5 or the small shaft shoulder 6 is provided with a rubber pad 15, at this time, the large shaft shoulder 5 or the small shaft shoulder 6 firstly impacts the rubber pad 15, and the rubber pad 15 can be used as a primary buffer.

Further, the outer wall of the retardation box 11 is fixed with an installation lug 16 used for being connected with the machine shell 1, the installation lug 16 is provided with an installation hole, the outer wall of the machine shell 1 is provided with a screw hole corresponding to the installation hole, the installation lug 16 can be fixed on the outer wall of the machine shell 1 by penetrating through the installation hole through a fastener, and then the retardation box 11 is fixed.

Furthermore, a dustproof net is arranged in the through hole 12, the through hole 12 is used for air leakage pressure when the blocking block 13 is displaced, the dustproof net can prevent dust, and dust is prevented from entering the blocking box 11.

In the above structure, the big shoulder 5 and the little shoulder 6 on the piston 2 slide in the first cavity 3, when the little shoulder 6 is close to and extrudes the first annular fender 7 in the second cavity 4 or the big shoulder 5 is close to and extrudes the first annular fender 7 in the first cavity 3, the first annular fender 7 is pressed to deflect, at this moment, the big shoulder 5 or the little shoulder 6 first strikes the rubber pad 15, the rubber pad 15 can be used as a preliminary buffer, the first spring 9 is arranged inside the first annular fender 7 and the second annular fender 8 and is compressed for the first-level buffer of the piston 2, the retarded oil in the cavity formed between the first annular fender 7 and the second annular fender 8 slowly enters the retarding box 11 from the oil passage 10, and then the retarded block 13 is pushed to extrude the second spring 14, the second spring 14 stores the force for the second-level buffer, when external force is withdrawn, the second spring 14 in the retarding box 11 pushes the retarding block 13, the retarded oil in the retarding box 11 pushes the first annular fender 8 and the hollow block 7, and the first annular fender 9 are simultaneously pushed, the problem that the first annular fender 7 and the first annular buffer 7 and the first annular bumper 2 are damaged is solved, and the piston 2 is solved simultaneously, and the problem that the impact of the first annular buffer occurs when the piston 2 and the hydraulic pressure of the first annular bumper, and the hydraulic pressure of the hydraulic pressure buffer.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a hydraulic pressure is multistage buffer for rock drill, includes casing (1), piston (2), its characterized in that: the middle of the machine shell (1) is provided with a first cavity (3) and a second cavity (4) which are communicated, the piston (2) is coaxially and sequentially provided with a large shaft shoulder (5) and a small shaft shoulder (6), the large shaft shoulder (5) is connected with the small shaft shoulder (6), the large shaft shoulder (5) and the small shaft shoulder (6) are respectively matched with the first cavity (3) and the second cavity (4), and buffering components are arranged in the first cavity (3) and the second cavity (4);

the buffer assembly mainly comprises a first annular blocking piece (7), a second annular blocking piece (8), a first spring (9), a retarding box (11), a retarding block (13) and a second spring (14), wherein the first annular blocking piece (7) is fixed in a first cavity (3) and a second cavity (4) respectively, the second annular blocking piece (8) is arranged in the first annular blocking piece (7) in a sliding fit mode, the second annular blocking piece (8) is in sliding fit with the inner walls of the first cavity (3) and the second cavity (4) respectively, a cavity is formed between the first annular blocking piece (7) and the second annular blocking piece (8), the first spring (9) is arranged in the cavity, the retarding box (11) is arranged on the outer wall of the machine shell (1), the retarding box (11) is communicated with the cavity through an oil channel (10), a through hole (12) is formed in one end, deviating from the machine shell (1), the retarding block (13) is arranged in the retarding box (11) in a sliding fit mode, and the second spring (14) is arranged between the retarding block (13) and the through hole (12) in the retarding box (11).

2. The multistage buffering device for the hydraulic rock drill according to claim 1, characterized in that: one surface of the first annular stopper (7) contacting the large shaft shoulder (5) or the small shaft shoulder (6) is provided with a rubber pad (15).

3. The multistage buffering device for the hydraulic rock drill according to claim 1, wherein: the outer wall of the retarding box (11) is fixed with a mounting lug (16) used for being connected with the machine shell (1), and the mounting lug (16) is provided with a mounting hole.

4. The multistage buffering device for the hydraulic rock drill according to claim 1, wherein: a dust screen is arranged in the through hole (12).