CN214614272U - Cylinder body oil circuit structure of hydraulic breaking hammer - Google Patents
Cylinder body oil circuit structure of hydraulic breaking hammer Download PDFInfo
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- CN214614272U CN214614272U CN202023339239.1U CN202023339239U CN214614272U CN 214614272 U CN214614272 U CN 214614272U CN 202023339239 U CN202023339239 U CN 202023339239U CN 214614272 U CN214614272 U CN 214614272U
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Abstract
The utility model provides a cylinder body oil circuit structure of hydraulic crushing hammer belongs to quartering hammer technical field. It has solved the not enough problem of hitting power of current piston. The cylinder body oil circuit structure of the hydraulic breaking hammer comprises a middle cylinder body and a rear cylinder body, wherein a first oil inlet channel is formed in the rear end face of the middle cylinder body along the axial direction of the middle cylinder body, a second oil inlet channel is formed in the front end face of the rear cylinder body along the axial direction of the rear cylinder body, the rear end port of the first oil inlet channel is communicated with the front end port of the second oil inlet channel, an oil inlet hole is formed in the middle cylinder body and is communicated with the front end of the first oil inlet channel, the first oil inlet channel comprises a reducing portion, and the inner diameter of the reducing portion is smaller than the inner diameter of the second oil inlet channel. The structure solves the problem of insufficient striking force of the piston.
Description
Technical Field
The utility model belongs to the technical field of the quartering hammer, especially a hydraulic pressure quartering hammer's cylinder body oil circuit structure.
Background
The hydraulic breaking hammer is a machine capable of converting hydraulic energy into mechanical energy so as to do work outwards, is mainly used for breaking, dismantling, excavating hard layers and the like, is usually installed on an excavator, a loader or a power station for use, and the hydraulic power of the hydraulic breaking hammer in the working process is provided by the excavator, the loader or the power station. The hydraulic breaking hammer comprises a front cylinder body, a middle cylinder body, a rear cylinder body, a drill rod, a piston and a reversing valve, wherein oil inlet channels are axially formed in the rear end face of the middle cylinder body and the front end face of the rear cylinder body, the two oil inlet channels are communicated, the drill rod is arranged in the front cylinder body, the piston is arranged in the middle cylinder body, a front high-pressure oil cavity and a rear high-pressure oil cavity are formed in the breaking hammer, hydraulic oil enters the front high-pressure oil cavity through the two oil inlet channels to further push the piston to ascend and return, a signal hole is opened in the piston ascending and returning process, the reversing valve is reversed, when the piston returns to a certain distance, the system pressure of the breaking hammer tends to be balanced, the piston stops ascending, the rear high-pressure oil cavity enters the high-pressure oil at the moment, the piston is pushed to descend, and the piston strikes the drill rod.
In a traditional cylinder body structure, the hole diameters of an oil inlet channel of a middle cylinder body and an oil inlet channel of a rear cylinder body are the same, the flow rates of hydraulic oil in the two oil inlet channels are the same, the speed of the hydraulic oil entering a front high-pressure oil cavity is slow, the speed of pushing a piston to rise is slow, the time required by opening a hydraulic oil signal hole is long, the time required by the system pressure of a breaking hammer to tend to be balanced is long, the time of the high-pressure oil entering the rear high-pressure oil cavity is short, the time of the high-pressure oil acting on the piston is short, and the striking force of the piston on a drill rod is influenced.
Disclosure of Invention
The utility model aims at having the above-mentioned problem to current technique, provided a hydraulic breaking hammer's cylinder body oil circuit structure, the utility model aims to solve the technical problem that: how to increase the striking force of the piston.
The purpose of the utility model can be realized by the following technical proposal:
the utility model provides a cylinder body oil circuit structure of hydraulic breaking hammer, includes well cylinder body and back cylinder body, oil feed passageway one has been seted up along the axial of well cylinder body to the rear end face of well cylinder body, oil feed passageway two has been seted up along the axial of back cylinder body to the preceding terminal surface of back cylinder body, the back port of oil feed passageway one is linked together with the front port of oil feed passageway two, the internal inlet port that has of well cylinder, the inlet port communicates with the front end of oil feed passageway one mutually, its characterized in that, oil feed passageway one includes undergauge portion, the internal diameter of undergauge portion is less than the internal diameter of oil feed passageway two.
The principle is as follows: the hydraulic oil firstly enters the oil inlet channel II, then the hydraulic oil in the oil inlet channel II enters the oil inlet channel I, because the first oil inlet channel is provided with the reducing part, the inner diameter of the reducing part is smaller than that of the second oil inlet channel, the structure increases the system pressure of the hydraulic oil in the oil inlet channel II, keeps the flow of the oil inlet channel II unchanged, increases the pressure in the oil inlet channel I, makes the flow rate of the hydraulic oil greater than that in the oil inlet channel II, so that the hydraulic oil enters the front high-pressure oil cavity of the breaking hammer in advance through the oil inlet hole, and further pushes the piston to return to open the hydraulic oil signal hole of the breaking hammer in advance, then the reversing valve is reversed in advance to shorten the pressure holding time, the system pressure of the breaking hammer is built in advance, hydraulic oil enters a rear high-pressure oil cavity of the breaking hammer, a piston stroke strikes a drill rod, the system pressure of the breaking hammer is built in advance, so that the striking force of the piston to the drill rod is improved.
In the cylinder body oil circuit structure of the hydraulic breaking hammer, one end of the reducing portion extends to the front end of the first oil inlet channel, and the other end of the reducing portion extends to the rear end of the first oil inlet channel. Through the setting of this structure, the length of undergauge portion is longer, and hydraulic oil flows through the whole velocity of flow of in-process of oil feed passageway one very fast, is favorable to improving the striking dynamics of piston.
In the cylinder body oil circuit structure of the hydraulic breaking hammer, the rear end face of the middle cylinder body is attached to the front end face of the rear cylinder body, positioning grooves are formed in the inner wall of the rear port of the oil inlet channel I and the inner wall of the front port of the oil inlet channel II, and the two positioning grooves are communicated to form a mounting groove; this cylinder body oil circuit structure is still including being annular joint, connect the setting in the mounting groove, the terminal surface that connects supports with the bottom surface of the constant head tank on the well cylinder body and leans on, another terminal surface that connects supports with the bottom surface of the constant head tank on the back cylinder body and leans on, the internal diameter that connects is the same with the internal diameter of oil feed passageway two. Through the setting of this structure, connect and compress tightly the location by well cylinder body and back cylinder body, the installation that connects is simple and convenient, connects to seal the junction between oil feed passageway one and the oil feed passageway two, avoids this junction to appear the oil leak condition, guarantees that the oil pressure in oil feed passageway one and the oil feed passageway two keeps the high-pressure state.
In the cylinder body oil circuit structure of the hydraulic breaking hammer, the outer peripheral surfaces of the front end and the rear end of the joint are provided with first annular seal grooves, first seal rings are arranged in the first seal grooves, and the first seal rings are attached to the bottom surface and the circumferential surface of the positioning groove. Through the arrangement of the structure, the first sealing ring is simultaneously attached to the bottom surface and the circumferential surface of the positioning groove, so that the first sealing ring has two seals, and the sealing effect of the joint between the first oil inlet channel and the second oil inlet channel is further improved.
In the cylinder body oil circuit structure of the hydraulic breaking hammer, an annular sealing groove II is formed in the rear end face of the middle cylinder body or the front end face of the rear cylinder body, and a sealing ring II is arranged in the sealing groove II. Through the setting of this structure, the sealed effect to the junction between oil feed passageway one and the oil feed passageway two is further improved in the setting of sealing washer two.
In the cylinder body oil circuit structure of the hydraulic breaking hammer, the inner wall of the first oil inlet channel is provided with a hammer-shaped guide surface, and the hammer-shaped guide surface is located between the rear end opening of the reducing portion and the positioning groove. Through the setting of this structure, the hammer-shaped direction plays the effect of direction to the flow of hydraulic oil for hydraulic oil can flow into to the undergauge portion in fast.
In the cylinder body oil circuit structure of the hydraulic breaking hammer, the rear end face of the middle cylinder body is provided with a first oil return channel along the axial direction of the middle cylinder body, the front end face of the rear cylinder body is provided with a second oil return channel along the axial direction of the rear cylinder body, the rear port of the first oil return channel is communicated with the front port of the second oil return channel, and the inner diameter of the first oil return channel is the same as that of the second oil return channel. Through the arrangement of the structure, because the inner diameter of the first oil return channel is the same as that of the second oil return channel, the resistance of hydraulic oil during backflow is smaller, and oil return is smoother.
Compared with the prior art, the utility model discloses a hydraulic breaking hammer's cylinder body oil circuit structure has following advantage: the system pressure of hydraulic oil in the oil inlet channel II is increased, the flow of the oil inlet channel II is unchanged, the pressure in the oil inlet channel I is increased, the flow rate of the hydraulic oil is larger than that in the oil inlet channel II, the hydraulic oil enters the front high-pressure oil cavity of the breaking hammer through the oil inlet hole in advance, the piston return stroke is pushed, the hydraulic oil signal hole of the breaking hammer is opened in advance, the reversing valve is reversed in advance, the pressure-holding time is shortened, the system pressure of the breaking hammer is built in advance, the hydraulic oil enters the rear high-pressure oil cavity of the breaking hammer, the piston stroke strikes the drill rod, and the system pressure of the breaking hammer is built in advance, so that the striking force of the piston on the drill rod is improved.
Drawings
Fig. 1 is a schematic sectional structure of the present invention.
Fig. 2 is an enlarged schematic view of a portion a in fig. 1.
Fig. 3 is a schematic sectional structure view of the joint and the first seal ring in fig. 2.
In the figure, 1, a middle cylinder body; 10. a first oil inlet channel; 10a, a reduced diameter portion; 11. an oil inlet hole; 12. a first oil return channel; 2. a rear cylinder body; 20. an oil inlet channel II; 21. an oil return channel II; 3. positioning a groove; 4. mounting grooves; 5. a joint; 50. a first sealing groove; 6. a first sealing ring; 7. a second sealing groove; 8. and a second sealing ring.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
As shown in fig. 1, fig. 2 and fig. 3, the cylinder body oil path structure of the hydraulic quartering hammer comprises a middle cylinder body 1 and a rear cylinder body 2, wherein a first oil inlet channel 10 is formed in the rear end face of the middle cylinder body 1 along the axial direction of the middle cylinder body 1, a second oil inlet channel 20 is formed in the front end face of the rear cylinder body 2 along the axial direction of the rear cylinder body 2, the rear end port of the first oil inlet channel 10 is communicated with the front end port of the second oil inlet channel 20, an oil inlet hole 11 is formed in the middle cylinder body 1, the oil inlet hole 11 is communicated with the front end of the first oil inlet channel 10, the first oil inlet channel 10 comprises a reducing portion 10a, and the inner diameter of the reducing portion 10a is smaller than the inner diameter of the second oil inlet channel 20. In this embodiment, one end of the reducing portion 10a extends to the front end of the first oil inlet channel 10, and the other end of the reducing portion 10a extends to the rear end of the first oil inlet channel 10. The hydraulic oil firstly enters the oil inlet channel II 20, then the hydraulic oil in the oil inlet channel II 20 enters the oil inlet channel I10, because the oil inlet channel I10 is provided with the reducing part 10a, the inner diameter of the reducing part 10a is smaller than that of the oil inlet channel II 20, the structure ensures that the system pressure of the hydraulic oil in the oil inlet channel II 20 is increased, the flow of the oil inlet channel II 20 is unchanged, the pressure in the oil inlet channel I10 is increased, the flow rate of the hydraulic oil is greater than that in the oil inlet channel II 20, so that the hydraulic oil enters the front high-pressure oil cavity of the breaking hammer in advance through the oil inlet hole 11, the return stroke of the piston is pushed to open the hydraulic oil signal hole of the breaking hammer in advance, then the reversing valve is reversed in advance, the pressure holding time is shortened, the system pressure of the breaking hammer is established in advance, the hydraulic oil enters the rear high-pressure oil cavity of the breaking hammer, the piston stroke hits the drill rod, and the system pressure of the breaking hammer is established in advance, thereby improving the striking force of the piston to the drill rod.
As shown in fig. 2, the rear end face of the middle cylinder body 1 is attached to the front end face of the rear cylinder body 2, positioning grooves 3 are formed in the inner wall of the rear port of the first oil inlet channel 10 and the inner wall of the front port of the second oil inlet channel 20, and the two positioning grooves 3 are communicated to form a mounting groove 4; the cylinder body oil circuit structure also comprises an annular joint 5, the joint 5 is arranged in the mounting groove 4, one end surface of the joint 5 abuts against the bottom surface of the positioning groove 3 on the middle cylinder body 1, the other end surface of the joint 5 abuts against the bottom surface of the positioning groove 3 on the rear cylinder body 2, and the inner diameter of the joint 5 is the same as that of the oil inlet channel II 20; the outer peripheral face of the front end and the outer peripheral face of the rear end of the joint 5 are provided with a first annular sealing groove 50, a first sealing ring 6 is arranged in the first sealing groove 50, the first sealing ring 6 is attached to the bottom face and the circumferential face of the positioning groove 3, a second annular sealing groove 7 is arranged on the rear end face of the middle cylinder body 1 or the front end face of the rear cylinder body 2, and a second sealing ring 8 is arranged in the second sealing groove 7. This structure seals the junction between oil feed passageway one 10 and the second 20 of oil feed passageway, avoids this junction to appear leaking the oil condition, guarantees that the oil pressure in oil feed passageway one 10 and the second 20 of oil feed passageway keeps the high pressure state.
As shown in fig. 2 and 3, the inner wall of the first oil inlet passage 10 has a hammer-shaped guide surface 10b, and the hammer-shaped guide surface 10b is located between the rear end of the reduced diameter portion 10a and the positioning groove 3. The hammer-shaped guide surface 10b plays a role in guiding the flow of hydraulic oil, so that the hydraulic oil can rapidly flow into the reducing part 10a, the breaking hammer is in the working process, the hydraulic oil in the oil inlet channel II 20 enters the oil inlet channel I10, the hydraulic oil can firstly impact on the hammer-shaped guide surface 10 and then enters the oil inlet channel I10, the hydraulic oil is enabled to have kinetic energy loss, and therefore when the excavator provides the hydraulic oil, the oil pressure supply of the hydraulic oil can be improved, and the hydraulic oil entering the oil inlet channel I10 is guaranteed to be kept in a high-pressure state.
As shown in fig. 1, the rear end surface of the middle cylinder body 1 is provided with a first oil return channel 12 along the axial direction of the middle cylinder body 1, the front end surface of the rear cylinder body 2 is provided with a second oil return channel 21 along the axial direction of the rear cylinder body 2, the rear end port of the first oil return channel 12 is communicated with the front end port of the second oil return channel 21, the inner diameter of the first oil return channel 12 is the same as that of the second oil return channel 21, resistance of hydraulic oil during backflow is small, and oil return is smooth.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (7)
1. The utility model provides a cylinder body oil circuit structure of hydraulic breaking hammer, includes well cylinder body (1) and back cylinder body (2), oil feed passageway (10) have been seted up along the axial of well cylinder body (1) to the rear end face of well cylinder body (1), oil feed passageway two (20) have been seted up along the axial of back cylinder body (2) to the preceding terminal surface of back cylinder body (2), the back port of oil feed passageway one (10) is linked together with the preceding port of oil feed passageway two (20), well cylinder body (1) has inlet port (11) in, inlet port (11) communicate with the front end of oil feed passageway one (10), its characterized in that, oil feed passageway one (10) are including undergauge portion (10a), the internal diameter of undergauge portion (10a) is less than the internal diameter of oil feed passageway two (20).
2. The cylinder oil circuit structure of the hydraulic breaking hammer according to claim 1, wherein one end of the reduced diameter portion (10a) extends to the front end of the first oil inlet channel (10), and the other end of the reduced diameter portion (10a) extends to the rear end of the first oil inlet channel (10).
3. The cylinder body oil circuit structure of the hydraulic breaking hammer according to claim 1 or 2, wherein the rear end face of the middle cylinder body (1) is attached to the front end face of the rear cylinder body (2), positioning grooves (3) are formed in the inner wall of the rear port of the oil inlet channel I (10) and the inner wall of the front port of the oil inlet channel II (20), and the two positioning grooves (3) are communicated to form a mounting groove (4); this cylinder body oil circuit structure is still including being annular joint (5), connect (5) and set up in mounting groove (4), the terminal surface that connects (5) supports with the bottom surface of constant head tank (3) on well cylinder body (1) and leans on, another terminal surface that connects (5) supports with the bottom surface of constant head tank (3) on back cylinder body (2) and leans on, the internal diameter that connects (5) is the same with the internal diameter of oil feed passageway two (20).
4. The cylinder body oil circuit structure of the hydraulic breaking hammer as claimed in claim 3, wherein the outer peripheral surfaces of the front end and the rear end of the joint (5) are provided with a first annular sealing groove (50), a first sealing ring (6) is arranged in the first sealing groove (50), and the first sealing ring (6) is attached to the bottom surface and the circumferential surface of the positioning groove (3).
5. The cylinder oil circuit structure of the hydraulic breaking hammer according to claim 3, wherein a second annular sealing groove (7) is formed in the rear end face of the middle cylinder (1) or the front end face of the rear cylinder (2), and a second sealing ring (8) is arranged in the second annular sealing groove (7).
6. The cylinder oil circuit structure of the hydraulic breaking hammer according to claim 3, wherein the inner wall of the first oil inlet channel (10) is provided with a hammer-shaped guide surface (10b), and the hammer-shaped guide surface (10b) is positioned between the rear end of the reduced diameter portion (10a) and the positioning groove (3).
7. The cylinder oil circuit structure of the hydraulic breaking hammer according to claim 1, wherein a first oil return channel (12) is formed in the rear end surface of the middle cylinder (1) along the axial direction of the middle cylinder (1), a second oil return channel (21) is formed in the front end surface of the rear cylinder (2) along the axial direction of the rear cylinder (2), a rear port of the first oil return channel (12) is communicated with a front port of the second oil return channel (21), and the inner diameter of the first oil return channel (12) is the same as the inner diameter of the second oil return channel (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023339239.1U CN214614272U (en) | 2020-12-31 | 2020-12-31 | Cylinder body oil circuit structure of hydraulic breaking hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023339239.1U CN214614272U (en) | 2020-12-31 | 2020-12-31 | Cylinder body oil circuit structure of hydraulic breaking hammer |
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| Publication Number | Publication Date |
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| CN214614272U true CN214614272U (en) | 2021-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023339239.1U Active CN214614272U (en) | 2020-12-31 | 2020-12-31 | Cylinder body oil circuit structure of hydraulic breaking hammer |
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- 2020-12-31 CN CN202023339239.1U patent/CN214614272U/en active Active
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