CN211873147U - Hydraulic breaking hammer capable of preventing piston from deforming - Google Patents
Hydraulic breaking hammer capable of preventing piston from deforming Download PDFInfo
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- CN211873147U CN211873147U CN201922267539.4U CN201922267539U CN211873147U CN 211873147 U CN211873147 U CN 211873147U CN 201922267539 U CN201922267539 U CN 201922267539U CN 211873147 U CN211873147 U CN 211873147U
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- drill rod
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Abstract
A piston deformation prevention hydraulic breaking hammer comprises a front cylinder body, a middle cylinder body, a rear cylinder body, a piston and a drill rod, wherein two ends of the middle cylinder body are respectively connected with the front cylinder body and the rear cylinder body, the drill rod is arranged on the front cylinder body, the bottom of the piston is abutted to the drill rod, a striking head is arranged at the bottom of the piston, the diameter of the striking head is smaller than that of the piston, oil seals are arranged between the piston and two ends of the middle cylinder body, and a gap is reserved between the bottom of the piston and the bottom of the middle cylinder body at the assembly position of the oil seals and the bottom of the. The utility model discloses be equipped with the striking head bottom the piston, the diameter of striking head slightly is less than the piston, can make the striking head strike many times and warp the diameter of rear striking head and still be less than or equal to the piston diameter, prevent the piston card in well cylinder body inner wall. The oil seal mounting groove moves backwards to prevent oil leakage caused by the fact that the oil seal crosses the matching position when the piston is in the upper limit position.
Description
Technical Field
The utility model relates to a quartering hammer technical field, concretely relates to prevent piston deformation hydraulic pressure quartering hammer.
Background
The hydraulic breaking hammer is combined with excavator, loader and other hydraulic station, and the hydraulic energy of the said equipment is used to realize the reciprocating impact of piston in the breaking hammer on pick rod to break the work object.
The hydraulic breaking hammer is combined with excavator, loader and other hydraulic station, and the hydraulic energy of the said equipment is used to realize the reciprocating impact of piston in the breaking hammer on pick rod to break the work object.
As shown in fig. 1 to 3, a hammer core of a conventional hydraulic breaking hammer mainly includes: nitrogen chamber (containing nitrogen gas injection valve), oil seal fixer, cylinder, piston, front shell, drill rod and change valve. The nitrogen chamber, the oil seal fixer (including the sealing element thereon), the cylinder body and the piston form a closed space, nitrogen is filled into the space (the interior of the nitrogen chamber) through the inflation valve, the piston moves upwards to compress the nitrogen along with the storage and release of nitrogen energy in the process of the piston reciprocating along the axial direction, the energy is stored, the piston moves downwards, and the hydraulic pressure and the nitrogen work together to push the piston to strike the drill rod.
The hydraulic breaking hammer works according to the following principle.
In the initial state, the piston is positioned at one end close to the drill rod under the action of nitrogen in the nitrogen chamber; at the moment of introducing high-pressure oil, the high-pressure oil enters the cylinder body and the interior of the reversing valve, and under the action of the hydraulic oil, the resultant force of the upper end surface of the valve core is greater than the resultant force of the lower end surface of the valve core, so that the valve is at the lower end of the reversing valve and is in a closed state.
In the piston return stage, on the basis of an initial state, under the action of high-pressure oil in the lower cavity, the piston moves upwards to compress nitrogen, the hydraulic oil in the upper cavity flows back to the oil tank, when the piston moves upwards to the highest point, the inside of the reversing valve controls the oil cavity to be communicated with the high-pressure oil, the valve moves upwards to the uppermost end of the reversing valve, an oil return opening on the valve is closed, an oil inlet is opened at the same time, and the high-pressure oil enters the high-pressure and low-pressure conversion cavity through the reversing valve. The high-low pressure conversion cavity at the upper part of the piston converts low pressure into high pressure.
And in the piston stroke stage, at the end of the return stroke of the piston, because the action area of the hydraulic oil in the upper cavity is larger than that of the lower cavity, the downward force is larger than the upward force, and the piston moves downward under the combined action of the oil pressure and the nitrogen pressure and strikes the drill rod.
When the piston moves downwards and is about to hit the drill rod, the signal oil cavity in the reversing valve is communicated with the low-pressure oil cavity of the cylinder body through a piston middle groove. The control oil cavity in the reversing valve is switched from high pressure to low pressure. The resultant force of the upper end surface of the valve is larger than that of the lower end surface of the valve, the valve moves downwards to the lowest end of the reversing valve and returns to the initial state, and a working cycle is completed.
The piston repeats the working process to complete the crushing task.
When a piston of an existing hydraulic hammer strikes a drill rod, the piston impacts the drill rod for too many times or impact force is too large, so that the piston and a cylinder body are damaged and deformed, or a piston head is directly impacted and broken, and the deformed piston is clamped in the middle cylinder body and is inconvenient to replace.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a piston deformation prevention hydraulic breaking hammer, which comprises a front cylinder body, a middle cylinder body, a rear cylinder body, a piston and a drill rod, wherein two ends of the middle cylinder body are respectively connected with the front cylinder body and the rear cylinder body, the drill rod is arranged on the front cylinder body, the bottom of the piston is abutted against the drill rod,
the piston bottom is equipped with the striking head, the striking head diameter is less than the piston diameter, be equipped with the oil blanket between piston and the well cylinder body both ends, the bottom oil blanket assembly department leaves the interval with well cylinder body bottom.
Furthermore, the height of the striking head is larger than the distance between the oil seal assembly position at the bottom and the bottom of the middle cylinder body.
Furthermore, the top of the striking head is fixedly connected with the piston, and a round corner is arranged between the top of the striking head and the piston.
Furthermore, a chamfer angle is arranged at the bottom of the striking head, so that the bottom of the striking head is conical, and the diameter of the bottom of the striking head is larger than that of the top end of the drill rod.
Furthermore, a plurality of oil seal assembling grooves are formed in the oil seal assembling position at the bottom, and intervals are reserved between the oil seal installing grooves and the bottom of the middle cylinder body and are 16 mm.
Further, the inner diameter of the oil seal installation part is the same as the diameter of the piston.
Further, an outer sheath and an inner sheath are arranged in the front cylinder body, and the outer sheath and the inner sheath are respectively coated on the outer peripheral surface of the drill rod.
Furthermore, the top end of the piston is provided with a blind hole along the central axis thereof.
Compared with the prior art, the invention has the beneficial effects that:
(1) the utility model discloses be equipped with the striking head bottom the piston, the diameter of striking head slightly is less than the piston, can make the striking head strike many times and warp the diameter of rear striking head and still be less than or equal to the piston diameter, prevent the piston card in well cylinder body inner wall.
(2) The oil seal mounting groove moves backwards to prevent oil leakage caused by the fact that the oil seal crosses the matching position when the piston is in the upper limit position.
Description of the drawings:
for ease of illustration, the invention is described in detail by the following detailed description and accompanying drawings.
FIG. 1 is a cross-sectional view of the prior art;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a prior art piston deformation configuration view;
FIG. 4 is a view of the structure of the present invention;
fig. 5 is a cross-sectional view of the present invention;
fig. 6 is a partially enlarged view of fig. 5.
The drill rod comprises a piston (1), a drill rod (2), a striking head (3), an oil seal (4) and a blind hole (5).
The specific implementation mode is as follows:
the following detailed description of the present invention will be made in conjunction with the accompanying drawings, but the following examples are merely illustrative of preferred embodiments, which are provided to assist understanding of the present invention, and are not to be construed as limiting the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout.
The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example 1
As shown in fig. 4.5.6, the following technical solutions are adopted in the present embodiment: a piston deformation prevention hydraulic breaking hammer comprises a front cylinder body, a middle cylinder body, a rear cylinder body, a piston 1 and a drill rod 2, wherein two ends of the middle cylinder body are respectively connected with the front cylinder body and the rear cylinder body, the drill rod 2 is arranged on the front cylinder body, the bottom of the piston 1 is abutted to the drill rod 2, a striking head 3 is arranged at the bottom of the piston 1, the diameter of the striking head 3 is smaller than that of the piston 1, an oil seal assembling position 4 is arranged between the piston 1 and two ends of the middle cylinder body, and a gap is reserved between the oil seal assembling position 4 at the bottom and the bottom of the middle cylinder body.
The height of the striking head 3 is larger than the distance between the assembly position of the oil seal 4 at the bottom and the bottom of the middle cylinder body.
The top of the striking head 3 is fixedly connected with the piston 1, and a round corner is arranged between the top of the striking head 3 and the piston 1.
The bottom of the striking head 3 is provided with a chamfer angle, so that the bottom of the striking head 3 is conical, and the diameter of the bottom of the striking head 3 is larger than that of the top end of the drill rod 2.
The bottom 4 assembly department of oil blanket is equipped with a plurality of oil blanket assembly grooves, oil blanket installation groove and well cylinder bottom leave the interval, the interval is 16 mm. The number of the oil seal grooves is four, the first three oil seals are provided with oil seals, and the last oil seal which is not provided with oil seals is used for returning oil.
The inner diameter of the oil seal 4 is the same as that of the piston 1.
An outer sheath and an inner sheath are arranged in the front cylinder body and respectively coated on the outer peripheral surface of the drill rod 2.
The top end of the piston 1 is provided with a blind hole 5 along the central axis thereof.
Example 2
Before the change, former piston head can lead to the head to warp because the quartering hammer impact force is too big, makes the piston head card inside well cylinder body, and maintenance personal can't take out the piston that warp from the cylinder body during later stage maintenance.
After the change, the front end of the piston head is provided with the striking head which retracts inwards, so that the diameter of the piston head is still smaller than that of the inside of the middle cylinder body when the head is deformed due to overlarge impact force of the breaking hammer, and the piston head is convenient to disassemble. The oil seal mounting groove moves backwards to prevent oil leakage caused by the fact that the oil seal crosses the matching position when the piston is in the upper limit position.
The blind hole is formed in the top end of the piston along the central axis of the piston, so that potential energy of nitrogen can be more accurately concentrated on the piston, and impact force is maximized.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. 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 (8)
1. The utility model provides a prevent piston deformation hydraulic pressure quartering hammer, includes preceding cylinder body, well cylinder body, back cylinder body, piston (1) and drill rod (2), the both ends of well cylinder body are connected with preceding cylinder body and back cylinder body respectively, drill rod (2) set up in the front on the cylinder body, piston (1) bottom and drill rod (2) butt, its characterized in that: the piston (1) bottom is equipped with hits head (3), hit head (3) diameter is less than piston (1) diameter, be equipped with oil blanket (4) between piston (1) and the well cylinder body both ends, the bottom oil blanket (4) assembly department leaves the interval with well cylinder body bottom.
2. The piston deformation prevention hydraulic demolition hammer as claimed in claim 1, wherein: the height of the striking head (3) is larger than the bottom of the oil seal (4) and the space left between the assembly position of the oil seal and the bottom of the middle cylinder body.
3. The piston deformation prevention hydraulic demolition hammer as claimed in claim 1, wherein: the top of the striking head (3) is fixedly connected with the piston (1), and a round angle is arranged between the top of the striking head (3) and the piston (1).
4. The piston deformation prevention hydraulic demolition hammer as claimed in claim 1, wherein: the bottom of the striking head (3) is provided with a chamfer angle, so that the bottom of the striking head (3) is conical, and the diameter of the bottom of the striking head (3) is larger than that of the top end of the drill rod (2).
5. The piston deformation prevention hydraulic demolition hammer as claimed in claim 1, wherein: the bottom oil blanket (4) assembly department is equipped with a plurality of oil blanket assembly grooves, oil blanket installation groove and well cylinder bottom leave the interval, the interval is 16 mm.
6. The piston deformation prevention hydraulic demolition hammer as claimed in claim 1, wherein: the inner diameter of the assembly part of the oil seal (4) is the same as that of the piston (1).
7. The piston deformation prevention hydraulic demolition hammer as claimed in claim 1, wherein: an outer sheath and an inner sheath are arranged in the front cylinder body and respectively coated on the peripheral surface of the drill rod (2).
8. The piston deformation prevention hydraulic demolition hammer as claimed in claim 1, wherein: the top end of the piston (1) is provided with a blind hole (5) along the central axis thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922267539.4U CN211873147U (en) | 2019-12-17 | 2019-12-17 | Hydraulic breaking hammer capable of preventing piston from deforming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922267539.4U CN211873147U (en) | 2019-12-17 | 2019-12-17 | Hydraulic breaking hammer capable of preventing piston from deforming |
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| CN211873147U true CN211873147U (en) | 2020-11-06 |
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| CN201922267539.4U Active CN211873147U (en) | 2019-12-17 | 2019-12-17 | Hydraulic breaking hammer capable of preventing piston from deforming |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855658A (en) * | 2021-02-04 | 2021-05-28 | 山东锐凯工程机械有限公司 | Split type piston for breaking hammer and equipment for installing split type piston |
| CN114405589A (en) * | 2022-03-29 | 2022-04-29 | 徐州徐工挖掘机械有限公司 | Breaking hammer and hammer body thereof |
-
2019
- 2019-12-17 CN CN201922267539.4U patent/CN211873147U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112855658A (en) * | 2021-02-04 | 2021-05-28 | 山东锐凯工程机械有限公司 | Split type piston for breaking hammer and equipment for installing split type piston |
| CN114405589A (en) * | 2022-03-29 | 2022-04-29 | 徐州徐工挖掘机械有限公司 | Breaking hammer and hammer body thereof |
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