CN118030644B - Stamping structure with high-sensitivity reversing valve core - Google Patents
Stamping structure with high-sensitivity reversing valve core Download PDFInfo
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- CN118030644B CN118030644B CN202410444055.5A CN202410444055A CN118030644B CN 118030644 B CN118030644 B CN 118030644B CN 202410444055 A CN202410444055 A CN 202410444055A CN 118030644 B CN118030644 B CN 118030644B
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- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000004891 communication Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 100
- 239000010720 hydraulic oil Substances 0.000 claims description 27
- 230000035945 sensitivity Effects 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 6
- 238000004080 punching Methods 0.000 description 5
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000306 component Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
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Abstract
The invention provides a stamping structure with a high-sensitivity reversing valve core, which comprises a reversing main body, wherein a piston divides a piston cavity into a first piston cavity, a second piston cavity and a third piston cavity; the valve core is arranged in the reversing valve cavity and provided with a sealing gasket, and when the valve core moves, the communication part of the second reversing valve cavity and the third reversing valve cavity can be opened or closed; the first oil way is communicated with the first piston cavity and the oil inlet way, the second oil way is communicated with the second reversing valve cavity and the oil inlet way, one end of the third oil way is communicated with the first reversing valve cavity, and the other end of the third oil way moves along with the piston and is communicated with the first piston cavity or the second piston cavity; the fourth oil way is communicated with the third reversing valve cavity and the third piston cavity; the oil return channel is communicated with the second piston cavity and the third piston cavity; the bearing area of the piston towards the third piston cavity is larger than the bearing area of the piston towards the first piston cavity. The stamping structure with the high-sensitivity reversing valve core can realize the conduction and closing of an oil way only by a short stroke, and has quick reversing response.
Description
Technical Field
The invention relates to the technical field of engineering machinery, in particular to a stamping structure with a high-sensitivity reversing valve core.
Background
Along with the continuous development of engineering technology, engineering mechanical equipment is gradually updated. Breaking hammers are commonly used when mining ore, rock, concrete or some other harder material. The hydraulic breaking hammer is a device which uses hydraulic energy as a power source and converts the hydraulic energy into mechanical striking kinetic energy in the movement process, so that a piston rod continuously impacts a drill rod to carry out breaking operation.
The reversing valve is an important core component in the breaking hammer, and has the main function of changing the flow direction of hydraulic oil, so that the piston can realize up-and-down reciprocating motion, and further strike the drill rod to realize the breaking function. The hydraulic breaking hammer conventionally used at present often has the following problems: the reversing valve has a complex structure and long stroke, and the reversing valve core can realize the conduction and the closing of an oil way only by reaching the corresponding stroke, so that the reversing time is long, the response of a piston is slow, and the striking frequency is influenced. The existing reversing stamping structure comprises a main body part, a valve core which is arranged in the main body part and can move up and down, a piston which can move up and down and various oil channels; when in an initial state, the piston is in a low position, hydraulic oil enters the upper part of the valve core from the upper channel and presses the reversing valve core downwards to push the reversing valve core to a low point, and at the moment, the upper channel of the reversing valve core communicates an upper piston cavity above the piston with the oil return channel; hydraulic oil also enters a lower piston cavity below the piston, and the pressure of the lower piston cavity is gradually increased under the pressure of the hydraulic oil to push the piston to move upwards; the hydraulic oil in the upper piston cavity is extruded by the upper piston to flow to the oil return channel through the upper channel of the reversing valve core; when the piston moves up to a certain height, the lower channel of the reversing valve core is communicated with the lower piston cavity, hydraulic oil enters the lower part of the reversing valve core at the moment and pushes the reversing valve core to move up to a high point, the lower channel of the reversing valve core communicates the oil inlet passage with the upper piston cavity at the moment, hydraulic oil enters the upper piston cavity at the moment and drives the piston to descend, and the reversing valve core is circulated and reciprocated in this way; when the reversing valve core is in reversing each time, due to structural limitation, the stroke of the reversing valve core is longer, the reversing valve core needs to be switched back and forth between a high point and a low point, so that the reversing speed is low, and a channel can be smoothly connected only after the reversing valve core moves in place, so that the reversing speed is also reduced.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the technical defects that the reversing valve core in the prior art is complex in structure, the reversing valve core is limited by the structure to cause long travel, the reversing valve core must reach corresponding travel to realize the conduction and closing of an oil way, the piston response is slow, and the striking frequency is influenced, so that the stamping structure of the reversing valve core with high sensitivity is provided.
To this end, the invention provides a punching structure with a high-sensitivity reversing valve core, which comprises a reversing main body, and further comprises:
The piston cavity is arranged in the reversing main body and is used for installing a piston; after the piston is installed into the piston cavity, the piston cavity is divided into a first piston cavity, a second piston cavity and a third piston cavity which are not communicated with each other;
The reversing valve cavity is arranged inside the reversing main body and comprises a first reversing valve cavity, a second reversing valve cavity and a third reversing valve cavity which are sequentially communicated;
the valve core is arranged in the reversing valve cavity and is provided with a sealing gasket which is respectively positioned in the first reversing valve cavity, the second reversing valve cavity or the third reversing valve cavity, and when the valve core moves, the communication part which is communicated with the second reversing valve cavity and the third reversing valve cavity can be opened or closed;
The oil inlet path is arranged in the reversing main body, and one end of the oil inlet path is communicated with an external oil path and is used for inputting hydraulic oil;
The first oil way is used for communicating the first piston cavity and the oil inlet way;
the second oil way is used for communicating the second reversing valve cavity with the oil inlet way;
One end of the third oil way is communicated with the first reversing valve cavity, and the other end of the third oil way is opened on the inner wall of the piston cavity; switching between communication with the first piston chamber and communication with the second piston chamber as the piston moves within the piston chamber;
the fourth oil way is used for communicating the third reversing valve cavity and the third piston cavity;
the oil return path is communicated with the second piston cavity and the third piston cavity;
the stress area of the piston facing the side of the third piston cavity is larger than the stress area of the piston facing the side of the first piston cavity.
Further, the piston comprises a first section, a second section and a third section which are sequentially connected; a first seal is arranged between the first section and the second section, and a second seal is arranged between the second section and the third section; the outer diameter of the piston is smaller than the outer diameter of the piston cavity to form a gap, and the piston cavity is divided into the first piston cavity, the second piston cavity and the third piston cavity by the first seal and the second seal.
Further, the outer diameter of the third section is smaller than the outer diameter of the first section, so that the stressed area of the piston facing the side of the third piston cavity is larger than the stressed area of the piston facing the side of the first piston cavity.
Further, a third seal is further arranged on the first section, and the first piston cavity is formed between the first seal and the third seal.
Further, an end cover is arranged at the tail part of the third piston cavity, the end cover is provided with an end cover cavity, the inner diameter of the end cover cavity is consistent with the outer diameter of the third section, the end cover cavity can be matched and inserted, and an oil return port is arranged on the end cover and is communicated with the end cover cavity.
Further, the valve core includes:
A valve stem;
The first sealing gasket is fixedly sleeved on the valve rod and positioned in the first reversing valve cavity to divide the first reversing valve cavity into two parts, one part is communicated with the third oil way, and the other part is communicated with the second reversing valve cavity;
The second sealing gasket is fixedly sleeved on the valve rod; the second reversing valve cavity is positioned in the second reversing valve cavity or the third reversing valve cavity, and is used for sealing or opening a channel communicated between the second reversing valve cavity and the third reversing valve cavity;
The limiting block is fixedly sleeved on the valve rod and positioned in the third reversing valve cavity, and a limiting blocking part opposite to the limiting block is further arranged in the third reversing valve cavity.
Further, the length of the communicating part which communicates the second reversing valve cavity and the third reversing valve cavity is 4mm-8mm.
Further, the device also comprises an energy accumulator, and the energy accumulator is communicated with the oil inlet pipe.
The technical scheme provided by the invention has the following advantages:
The stamping structure with the high-sensitivity reversing valve core has the advantages that the adopted reversing valve core is simple in structure and short in stroke; compared with the prior art, the technical scheme of the invention changes the reversing mode of the reversing valve core from a stroke mode to a switch mode, namely, the valve core does not need to move in place to smoothly connect the channel during reversing, but only slightly moves, so that the channel between the second reversing valve cavity and the third reversing valve cavity is opened or closed, and the reversing is realized rapidly; the reversing valve adopted by the reversing stamping structure is a switch type valve, so that the reversing time is short, the response of the piston is quick, and the stamping striking frequency is high.
Drawings
In order to more clearly illustrate the technical solutions in the prior art or in the embodiments of the present invention, the following brief description is given of the drawings used in the description of the prior art or the embodiments.
Fig. 1 is a schematic top view of a stamped configuration of the present invention with a high sensitivity reversing valve cartridge.
Fig. 2 is a schematic cross-sectional view of a stamped configuration of the present invention with a high sensitivity reversing valve cartridge.
Reference numerals: 1. a main body; 11. a piston chamber; 111. a first piston chamber; 112. a second piston chamber; 113. a third piston chamber; 12. a reversing valve cavity; 121. a first reversing valve chamber; 122. a second reversing valve chamber; 123. a third reversing valve chamber; 13. an oil inlet path; 14. a first oil passage; 15. a second oil path; 16. a third oil passage; 17. a fourth oil passage; 2. a piston; 21. a first section; 22. a second section; 23. a third section; 24. a first seal; 25. a second seal; 26. a third seal; 3. a valve core; 30. a valve stem; 31. a first gasket; 32. a second gasket; 33. a limiting block; 34. a limit blocking part; 35. a limiting plate; 4. an end cap; 41. an end cap cavity; 42. an external oil inlet; 43. an external oil return port; 5. an accumulator.
Detailed Description
In order that those skilled in the art will better understand the present solution, a technical solution according to an embodiment of the present application will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiment is only a part of the embodiment of the present application, not all of the embodiment. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, shall fall within the scope of the application.
It should be noted that the terms "first," "second," and the like in the claims and description herein are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are only used to better describe the present application and its embodiments and are not intended to limit the scope of the indicated devices, elements or components to the particular orientations or to configure and operate in the particular orientations. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the present application can be understood by those skilled in the art according to the specific circumstances. In addition, the term "plurality" shall mean two as well as more than two. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.
The application will be described in detail below with reference to the drawings in connection with embodiments.
The embodiment provides a stamping structure with a high-sensitivity reversing valve core, which is shown in fig. 1-2, and further comprises a reversing main body 1, a piston cavity 11, a reversing valve cavity 12, a valve core 3, an oil inlet path 13, a first oil path 14, a second oil path 15, a third oil path 16, a fourth oil path 17 and an oil return path; wherein, the piston cavity 11 is arranged inside the reversing main body 1 and is used for installing the piston 2; when the piston 2 is installed into the piston chamber 11, the piston chamber 11 is divided into a first piston chamber 111, a second piston chamber 112 and a third piston chamber 113 which are not communicated with each other; the reversing valve cavity 12 is arranged inside the reversing main body 1 and comprises a first reversing valve cavity 121, a second reversing valve cavity 122 and a third reversing valve cavity 123 which are sequentially communicated; the valve core 3 is installed inside the reversing valve cavity 12 and is provided with sealing gaskets respectively positioned inside the first reversing valve cavity 121, the second reversing valve cavity 122 or the third reversing valve cavity 123, and when the valve core 3 moves, a communicating part which communicates the second reversing valve cavity 122 and the third reversing valve cavity 123 can be opened or closed; the oil inlet path 13 is arranged in the reversing main body 1, and one end of the oil inlet path is communicated with an external oil path and is used for inputting hydraulic oil; the first oil passage 14 is used for communicating the first piston chamber 111 and the oil inlet passage 13; the second oil passage 15 is used for communicating the second reversing valve cavity 122 with the oil inlet passage 13; one end of the third oil passage 16 is communicated with the first reversing valve cavity 121, and the other end of the third oil passage is opened on the inner wall of the piston cavity 11; switching between communication with the first piston chamber 111 and communication with the second piston chamber 112 when the piston 2 moves inside the piston chamber 11; the fourth oil passage 17 is used for communicating the third reversing valve chamber 123 and the third piston chamber 113; the oil return path is communicated with the second piston cavity 112 and the third piston cavity 113; the force bearing area of the piston 2 on the side facing the third piston chamber 113 is larger than the force bearing area of the piston 2 on the side facing the first piston chamber 111.
In the punching structure with the high-sensitivity reversing valve core of the embodiment, taking the initial state of the piston 2 being in the extended position as an example, external hydraulic oil enters the first piston cavity 111 through the oil inlet path 13 and the first oil path 14; meanwhile, the hydraulic oil enters the second reversing valve cavity 122 through the second oil way 15, at this time, the first reversing valve cavity 121 is communicated with the second piston cavity 112 through the third oil way 16 and then is communicated with an oil return way, hydraulic oil entering the second reversing valve cavity 122 drives the valve core 3 to move towards the first reversing valve cavity 121, and a sealing gasket of the valve core 3 closes the communicated part of the second reversing valve cavity 122 and the third reversing valve cavity 123; The hydraulic oil entering the first piston cavity 111 pushes the piston 2 to retract, and in the process, the piston 2 moves towards the third piston cavity 113, so that the volume of the third piston cavity 113 gradually becomes smaller, and the hydraulic oil in the third piston cavity 113 enters an oil return path through an oil return port to be discharged; when the piston 2 is retracted to a certain position, the tail end of the piston 2 seals a passage between the third piston cavity 113 and the oil return passage, one end of the third oil passage 16 is communicated with the first piston cavity 111, hydraulic oil in the first piston cavity 111 enters the first reversing valve cavity 121 through the third oil passage 16, and pushes the valve core 3 to move to one side of the third reversing valve cavity 123; During the movement, the gasket gradually opens the communication portion between the second and third valve chambers 122 and 123; hydraulic oil from the oil inlet passage 13 enters the third piston chamber 113 through the second oil passage 15, the second reversing valve chamber 122, the third reversing valve chamber 123, and the fourth oil passage 17; at this time, the pressure of the hydraulic oil in the first piston chamber 111 and the pressure of the hydraulic oil in the third piston chamber 113 are the same, and the force applied to the side of the piston 2 toward the third piston chamber 113 is larger than the force applied to the side of the piston 2 toward the first piston chamber 111 because the force applied to the side of the piston 2 toward the third piston chamber 113 is larger than the force applied to the side of the piston 2 toward the first piston chamber 111, and after the gravity of the piston 2 is combined, the piston 2 starts to extend and move in the direction of the first piston chamber 111; When the piston 2 is extended to a certain distance, the communication between the third oil passage 16 and the first piston chamber 111 is closed, the third oil passage 16 is communicated with the second piston chamber 112, and because the second piston chamber 112 is communicated with the oil return passage, the hydraulic oil in the first reversing valve chamber 121 enters the oil return passage through the third oil passage 16 and the second piston chamber 112, the oil pressure in the first reversing valve chamber 121 is reduced, the valve core 3 moves toward the low-pressure side of the first reversing valve chamber 121, the sealing gasket reseals the passage between the second reversing valve chamber 122 and the third reversing valve chamber 123, the hydraulic oil in the oil inlet passage 13 no longer enters the third piston chamber 113; hydraulic oil from the oil inlet passage 13 enters the first piston chamber 111 through the first oil passage 14 and pushes the piston 2 to perform retracting motion again.
The stamping structure with the high-sensitivity reversing valve core of the embodiment, the piston 2 comprises a first section 21, a second section 22 and a third section 23 which are sequentially connected; a first seal 24 is arranged between the first section 21 and the second section 22, and a second seal 25 is arranged between the second section 22 and the third section 23; the outer diameter of the piston 2 is smaller than the outer diameter of the piston chamber 11 to form a gap, and the piston chamber 11 is partitioned into the first, second and third piston chambers 111, 112, 113 by the first and second seals 24, 25.
In the stamping structure with the high-sensitivity reversing valve core of the embodiment, when the piston 2 is retracted to the left (shown in fig. 2) to a certain position, the first seal 24 breaks the communication between the first piston cavity 111 and the third oil circuit 16, and hydraulic oil in the first oil circuit 14 can only enter the first piston cavity 111; the third oil passage 16 communicates with the second piston chamber 112, and hydraulic oil in the third oil passage 16 enters the return passage through the second piston chamber 112. When the piston 2 extends rightward to a certain position, the first seal 24 disconnects the communication between the third oil passage 16 and the second piston chamber 112, the first oil passage 14 communicates with the third oil passage 16 through the first piston chamber 111, and the hydraulic oil in the first oil passage 14 enters the third oil passage 16 through the first piston chamber 111. The second seal 25 seals between the third piston chamber 113 and the second piston chamber 112, preventing hydraulic oil from flowing between the third piston chamber 113 and the second piston chamber 112.
In the stamped structure with the high-sensitivity reversing valve core of this embodiment, the outer diameter of the third section 23 is smaller than the outer diameter of the first section 21, so that the stress area of the piston 2 facing the third piston chamber 113 is larger than the stress area of the piston 2 facing the first piston chamber 111.
In the punching structure of the high-sensitivity reversing valve core of this embodiment, a third seal 26 is further disposed on the first section 21, and the first piston cavity 111 is formed between the first seal 24 and the third seal 26.
In the stamping structure with the high-sensitivity reversing valve core of the embodiment, the end cover 4 is mounted at the tail part of the third piston cavity 113, the end cover 4 is provided with the end cover cavity 41, the inner diameter of the end cover cavity 41 is consistent with the outer diameter of the third section 23, the end cover cavity 41 can be matched and inserted, and an oil return port is arranged on the end cover 4 and is communicated with the end cover cavity 41.
Further, the end cover 4 is further provided with an external oil inlet 42 communicated with the oil inlet channel 13 and an external oil return port 43 communicated with the oil return channel.
The punching structure with the high-sensitivity reversing valve core of the embodiment, the valve core 3 comprises a valve rod 30, a first sealing gasket 31, a second sealing gasket 32 and a limiting block 33: the first sealing gasket 31 is fixedly sleeved on the valve rod 30 and is positioned in the first reversing valve cavity 121 to divide the first reversing valve cavity 121 into two parts, one part is communicated with the third oil circuit 16, and the other part is communicated with the second reversing valve cavity 122; the second gasket 32 is fixedly sleeved on the valve rod 30 and is positioned in the second reversing valve cavity 122 or the third reversing valve cavity 123, and is used for sealing or opening a channel communicated between the second reversing valve cavity 122 and the third reversing valve cavity 123; the limiting block 33 is fixedly sleeved on the valve rod 30, and a limiting blocking portion 34 opposite to the limiting block 33 is arranged inside the third reversing valve cavity 123. In this embodiment, the stopper 33 and the limit stop 34 cooperate to limit the valve core 3. Further, the valve core 3 further includes a limiting plate 35, where the limiting plate 35 is fixedly installed at an end of the valve rod 30 located at one side of the first reversing valve cavity 121, and is used for limiting the valve core 3.
The length of the communicating portion that communicates the second reversing valve chamber 122 and the third reversing valve chamber 123 in the punching structure with the high-sensitivity reversing valve core of this embodiment is 4mm to 8mm.
The stamping structure with the high-sensitivity reversing valve core of the embodiment further comprises an energy accumulator 5, and the energy accumulator 5 is communicated with the oil inlet path 13. The accumulator 5 stores energy when the first piston cavity 111 is supplied with oil through the oil inlet path 13 and the first oil path 14; after the second and third reversing valve chambers 122, 123 are communicated, the accumulator 5 releases pressure, pushing hydraulic oil into the third piston chamber 113 at a greater pressure, thereby pushing the piston 2 to extend outwardly with a greater force.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious changes and modifications which are extended therefrom are still within the scope of the present innovative teachings.
Claims (6)
1. A stamping structure with high sensitivity reversing valve core, comprising a reversing main body (1), characterized in that it further comprises:
The piston cavity (11) is arranged in the reversing main body (1) and is used for installing the piston (2); after the piston (2) is installed into the piston cavity (11), the piston cavity (11) is divided into a first piston cavity (111), a second piston cavity (112) and a third piston cavity (113) which are not communicated with each other;
The piston (2) comprises a first section (21), a second section (22) and a third section (23) which are connected in sequence; a first seal (24) is arranged between the first section (21) and the second section (22), and a second seal (25) is arranged between the second section (22) and the third section (23); the outer diameter of the piston (2) is smaller than the outer diameter of the piston cavity (11) to form a gap, and the piston cavity (11) is divided into the first piston cavity (111), the second piston cavity (112) and the third piston cavity (113) by the first seal (24) and the second seal (25);
The reversing valve cavity (12) is arranged inside the reversing main body (1) and comprises a first reversing valve cavity (121), a second reversing valve cavity (122) and a third reversing valve cavity (123) which are sequentially communicated;
A valve core (3) which is arranged inside the reversing valve cavity (12) and is provided with a sealing gasket respectively positioned inside the first reversing valve cavity (121), the second reversing valve cavity (122) or the third reversing valve cavity (123), wherein when the valve core (3) moves, a communicating part which communicates the second reversing valve cavity (122) and the third reversing valve cavity (123) can be opened or closed; the valve element (3) comprises: a valve stem (30); the first sealing gasket (31) is fixedly sleeved on the valve rod (30) and positioned in the first reversing valve cavity (121), the first reversing valve cavity (121) is divided into two parts, one part is communicated with the third oil way (16), and the other part is communicated with the second reversing valve cavity (122); a second sealing gasket (32) fixedly sleeved on the valve rod (30); is positioned inside the second reversing valve cavity (122) or the third reversing valve cavity (123) and is used for sealing or opening a channel communicated between the second reversing valve cavity (122) and the third reversing valve cavity (123); the limiting block (33) is fixedly sleeved on the valve rod (30) and positioned in the third reversing valve cavity (123), and a limiting blocking part (34) opposite to the limiting block (33) is further arranged in the third reversing valve cavity (123);
The oil inlet path (13) is arranged in the reversing main body (1), and one end of the oil inlet path is communicated with an external oil path and is used for inputting hydraulic oil;
A first oil passage (14) for communicating the first piston chamber (111) with the oil intake passage (13);
the second oil way (15) is used for communicating the second reversing valve cavity (122) with the oil inlet way (13);
A third oil passage (16), one end of which is communicated with the first reversing valve chamber (121) and the other end of which is opened on the inner wall of the piston chamber (11); switching between communication with the first piston chamber (111) and communication with the second piston chamber (112) when the piston (2) moves inside the piston chamber (11);
A fourth oil passage (17) for communicating the third reversing valve chamber (123) and the third piston chamber (113);
an oil return path communicating with the second piston chamber (112) and the third piston chamber (113);
the stress area of the piston (2) facing the side of the third piston cavity (113) is larger than the stress area of the piston (2) facing the side of the first piston cavity (111).
2. The stamped configuration of high sensitivity reversing valve cartridge of claim 1, wherein: the outer diameter of the third section (23) is smaller than the outer diameter of the first section (21) so that the bearing surface area of the piston (2) towards the third piston chamber (113) is larger than the bearing surface area of the piston (2) towards the first piston chamber (111).
3. The stamped configuration of high sensitivity reversing valve cartridge of claim 1, wherein: a third seal (26) is further arranged on the first section (21), and the first piston cavity (111) is formed between the first seal (24) and the third seal (26).
4. The stamped configuration of high sensitivity reversing valve cartridge of claim 1, wherein: an end cover (4) is arranged at the tail part of the third piston cavity (113), the end cover (4) is provided with an end cover cavity (41), the inner diameter of the end cover cavity (41) is consistent with the outer diameter of the third section (23) in size and can be matched and inserted, and an oil return port is arranged on the end cover (4) and is communicated with the end cover cavity (41).
5. The stamped configuration of high sensitivity reversing valve cartridge of claim 1, wherein: the length of the communicating portion that communicates the second reversing valve chamber (122) and the third reversing valve chamber (123) is 4mm to 8mm.
6. The stamped configuration of high sensitivity reversing valve cartridge of claim 1, wherein: the oil-filled type oil pump further comprises an energy accumulator (5), and the energy accumulator (5) is communicated with the oil inlet path (13).
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| CN202410444055.5A CN118030644B (en) | 2024-04-15 | 2024-04-15 | Stamping structure with high-sensitivity reversing valve core |
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| CN202410444055.5A CN118030644B (en) | 2024-04-15 | 2024-04-15 | Stamping structure with high-sensitivity reversing valve core |
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| CN112178006B (en) * | 2020-08-21 | 2022-12-09 | 合肥长源液压股份有限公司 | Automatic reversing hydraulic cylinder |
| CN213839099U (en) * | 2020-11-10 | 2021-07-30 | 山东天瑞重工有限公司 | External reversing device for high-speed rock drilling percussion drill |
| CN113236112B (en) * | 2021-06-29 | 2024-06-18 | 山河智能装备股份有限公司 | Signal oil output structure of hydraulic rock drill impact cylinder |
| CN113819106B (en) * | 2021-10-15 | 2024-04-19 | 洛阳普斯特智能机器人有限公司 | Mechanical automatic reversing valve and use method thereof |
| CN115405586A (en) * | 2022-09-30 | 2022-11-29 | 聂朝阳 | Middle cylinder assembly of hydraulic breaking hammer |
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| CN114542539A (en) * | 2022-03-08 | 2022-05-27 | 浙江志高机械股份有限公司 | Reversing valve of rock drill |
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