CN114603519B - Pressure relief structure - Google Patents
Pressure relief structure Download PDFInfo
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- CN114603519B CN114603519B CN202210280896.8A CN202210280896A CN114603519B CN 114603519 B CN114603519 B CN 114603519B CN 202210280896 A CN202210280896 A CN 202210280896A CN 114603519 B CN114603519 B CN 114603519B
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- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims description 50
- 210000004907 gland Anatomy 0.000 claims description 29
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 230000007704 transition Effects 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 210000002268 wool Anatomy 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
Abstract
The invention discloses a pressure relief structure, which comprises an oil sealing cover, a gear meshing area and a crankshaft movable area; the oil seal cover is provided with the vent hole, and the gear meshing area is provided with the pressure relief hole, so that the pressure relief device provided by the invention has a plurality of pressure relief points, and the pressure relief efficiency is further ensured to be improved; the pressure relief hole comprises a normally open pressure relief hole and a controllable pressure relief hole, wherein the normally open pressure relief hole enables the equipment provided with the invention to perform pressure relief work when pressure and temperature are generated, so that the pressure relief is not started until the pressure and the temperature in the equipment are in a higher state, and the equipment provided with the invention is safer; meanwhile, the arrangement of the controllable pressure relief holes further ensures the safety of the equipment provided with the invention, when the pressure and the temperature in the equipment are too high and cannot be timed through normally open pressure relief Kong Wen, the pressure can be relieved through the controllable pressure relief holes, so that the pressure and the temperature in the equipment are ensured to be in constant values, and the equipment provided with the invention can be more stable and safer.
Description
Technical Field
The invention relates to the field of manufacturing and research and development of hammer pick products, in particular to a pressure relief structure.
Background
The hammer pick is powered by a motor, an eccentric shaft is driven by gear transmission, the eccentric shaft drives a piston connecting rod to reciprocate, compressed air drives a hammer punch to transmit continuous impact force to the bottom of a pick drill rod and a drill bit, and therefore firm objects are crushed; in general, in order to protect transmission devices such as gears and the like to complete mechanical energy transmission, a transmission chamber is arranged in a hammer, and the transmission devices are arranged in the transmission chamber; in the process of using the product for a long time by a user, the phenomena of oil seal cover cracking, oil carbonization and the like are found due to the high temperature and high pressure in the crankcase and the conduction chamber, and the damage force is high, and the possibility of hurting people and objects is high, so that a corresponding pressure release structure is arranged on the hammer to release the high temperature and high pressure in the crankcase; the pressure release structure of the hammer pick on the market at present is usually only provided with one pressure release structure, so that the pressure release efficiency is lower, and the pressure release is started only when the internal pressure reaches a certain strength, so that the internal pressure and the internal temperature of the hammer pick are in dangerous states, and therefore, the pressure release structure capable of releasing pressure in real time and having certain pressure release efficiency is required;
the oil seal cover of the hammer pick on the market at present is not provided with a pressure relief structure generally, or some sealing covers with pressure relief structures cannot be used for well preventing oil and filtering gas, so that oil stains block the exhaust holes in the oil seal cover, and the pressure relief capability is insufficient.
Disclosure of Invention
The invention overcomes the defects of the prior art and provides the pressure relief structure which has the advantages of simple structure, reasonable design, higher pressure relief efficiency and safer volume.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the pressure relief structure is arranged on mechanical equipment and comprises a crank case, wherein a conduction chamber is arranged in the crank case and comprises a gear meshing area and a crank shaft moving area, and the gear meshing area is communicated with the crank shaft moving area; the crankshaft active area is provided with an oil filling port and a corresponding oil sealing cover; the oil seal cover comprises an oil seal cover body, and an exhaust hole is formed in the oil seal cover body; the gear meshing area is also provided with a pressure relief hole; the pressure relief hole comprises a normally open pressure relief hole which is normally open and a controllable pressure relief hole which is provided with a valve body.
Further, the normally open pressure relief hole and the controllable pressure relief hole are arranged on different surfaces of the gear meshing zone; the normally open pressure relief hole and the controllable pressure relief hole are both arranged on the upper half part of the gear meshing zone.
Further, the valve body is a pressure relief valve; the normally open pressure relief hole is also provided with a filter.
Further, the filter element is arranged in the normally open pressure relief hole or arranged at the position of the conduction chamber corresponding to the normally open pressure relief hole.
Further, a filtering space is arranged in the gear meshing area, and a filtering piece is arranged in the filtering space; the filtering space is communicated with the normally open pressure relief hole and the gear meshing area; the filtering space comprises a filtering inlet and a filtering outlet, the filtering outlet is communicated with the normally open pressure relief hole, and the filtering inlet is arranged at one end of the filtering space corresponding to the lower half part of the gear meshing zone.
Further, the controllable pressure relief hole comprises a controllable pressure relief air inlet, a controllable pressure relief air outlet and an excessive space; the transition space is arranged between the controllable pressure relief air inlet and the controllable pressure relief air outlet, the controllable pressure relief air inlet is communicated with the gear meshing area, the controllable pressure relief air outlet is communicated with the external space, and the pressure relief valve is arranged at the controllable pressure relief air outlet; the transition space comprises a first area and a second area, the first area is communicated with the second area, one end of the first area, which is far away from the second area, is communicated with the controllable pressure relief air inlet, and one end of the second area, which is far away from the first area, is communicated with the controllable pressure relief air outlet; the inner diameter at the first region is smaller than the inner diameter at the second region, and the inner diameter at the first region gradually increases; the larger inner diameter end of the first area is communicated with the second area.
Further, the oil seal cover comprises an oil seal cover body, and the exhaust hole is arranged on the oil seal cover body; a pressure relief space is arranged in the oil seal cover body; the oil seal cover body is also provided with an air inlet hole, and the air inlet hole and the air outlet hole are arranged on different sides of the pressure relief space.
Further, the oil seal cover also comprises a filter element, and the filter element is arranged in the pressure relief space; the filter is positioned between the exhaust hole and the air inlet hole.
Further, the oil seal cover also comprises an inner gland; an opening is arranged in the pressure relief space, and the inner pressure cover is assembled at the opening; the opening and the air inlet are arranged on the same side of the pressure relief space; an internal pressure cover opening corresponding to the air inlet is formed in the internal pressure cover; at least one inner pressure cover limiting block is arranged on the inner pressure cover, an inlet is arranged at one end of the air inlet, which is far away from the exhaust hole, of the inner pressure cover limiting block, and the inner pressure cover limiting block enters the air inlet through the inlet; the inner gland and the oil seal cover body are connected through screws; an assembly column is arranged in the pressure relief space, an assembly space is arranged in the assembly column, and assembly threads are arranged on the inner surface of the assembly space; a filter piece through hole for the assembly column to pass through is arranged on the filter piece; an inner pressure cover through hole for a screw to pass through is formed in the inner pressure cover; an assembly limiting part is arranged on the end face, close to the oil seal cover body, of the inner gland through hole, and a screw limiting part is arranged on the end face, far away from the oil seal cover body, of the inner gland through hole; the inner diameters of the assembly limiting part and the screw limiting part are both larger than the inner diameter of the inner pressure cover through hole, and are arranged around the inner pressure cover through hole; the assembly limiting part surrounds the assembly limiting space, the inner diameter of the assembly limiting space corresponds to the outer diameter of the assembly column, and one end of the assembly column enters the assembly limiting space; the screw limiting part surrounds and forms a screw limiting space, and when the rod part of the screw passes through the inner gland through hole and enters the assembly space, the head part of the screw enters the screw limiting space.
Further, the oil seal cover body comprises a cover body and a pressure relief column; the cover body comprises a top plate and a side plate, the side plate is arranged on the lower surface of the top plate and surrounds the top plate, and the top plate and the side plate surround to form a cover inner space; the pressure relief column is arranged in the space in the sealing cover, and the pressure relief space is arranged in the pressure relief column; one end of the pressure release column is connected with the lower surface of the top plate; the exhaust hole is arranged at the position of the top plate corresponding to the pressure relief space and is communicated with the pressure relief space and the external space of the pressure relief oil seal cover; the air inlet hole is arranged on the side surface of the pressure relief column and is communicated with the pressure relief space and the space in the sealing cover; a reinforcing block is further arranged in the inner space of the sealing cover, one end of the reinforcing block is connected with the inner surface of the side plate, the other end of the reinforcing block is connected with the side surface of the pressure relief column, and one side surface of the reinforcing block is connected with the lower surface of the top plate; an assembly groove is formed in the outer surface of the side plate, and an oil seal cover groove is formed in one end, close to the top plate, of the assembly groove; the oil seal cover is also provided with a rubber ring which is sleeved in the oil seal cover groove.
The beneficial effects of the invention are as follows:
the oil seal cover is provided with the exhaust hole, and the gear meshing area is provided with the pressure relief hole, so that the oil seal cover is provided with a plurality of pressure relief points, and the pressure relief efficiency is further ensured to be improved; the pressure relief hole comprises a normally open pressure relief hole and a controllable pressure relief hole, wherein the normally open pressure relief hole enables the equipment provided with the invention to perform pressure relief work when pressure and temperature are generated, and avoids the pressure relief when the pressure and temperature inside the equipment are in a higher state, so that the equipment provided with the invention is safer; meanwhile, the arrangement of the controllable pressure relief holes further ensures the safety of the equipment provided with the invention, when the pressure and the temperature in the equipment are too high and cannot be timed through normally open pressure relief Kong Wen, the pressure can be relieved through the controllable pressure relief holes, so that the pressure and the temperature in the equipment are ensured to be in constant values, and the equipment provided with the invention can be more stable and safer.
In the invention, the normally open pressure relief hole and the controllable pressure relief hole are arranged on different surfaces of the gear meshing zone, so that the normally open pressure relief hole and the controllable pressure relief hole can perform pressure relief more uniformly and avoid the mutual influence of the normally open pressure relief hole and the controllable pressure relief hole when pressure relief work is performed simultaneously; in addition, generally, the gas with higher temperature is generally located above the gas with lower temperature, so that the normally open pressure relief hole and the controllable pressure relief hole are both arranged on the upper half part of the gear meshing zone, and the pressure relief efficiency of the equipment can be accelerated through the phenomenon.
The valve body is a pressure relief valve, and the opening and the closing of the controllable pressure relief hole are controlled through the pressure relief valve, so that the controllable pressure relief hole can be opened and closed as required, and the steps of opening and closing can be more accurate; the normally open pressure release hole is also provided with the filter element and plays grease proofing gas filtration effect, avoids greasy dirt to plug up normally open pressure release hole and leads to the pressure release difficulty.
The arrangement of the filtering space ensures that the filter element with the normally open pressure relief hole is firmer and more stable during assembly; when the temperature of the gas in the gear meshing zone gradually rises and the pressure intensity gradually increases, the gas will rise, and the filtering inlet is arranged at one end of the filtering space corresponding to the lower half part of the gear meshing zone, so that the high-pressure gas in the gear meshing zone can conveniently enter the filtering space.
The controllable pressure relief hole comprises a controllable pressure relief air inlet, a controllable pressure relief air outlet and an excessive space; the setting of the excessive space enables the triggering of the pressure relief valve to be more accurate; when the pressure and the temperature in the gear meshing zone are gradually increased, high-pressure gas enters the excessive space, the pressure relief valve starts to work after the gas pressure in the excessive space is increased to a certain degree, and stops working after the gas pressure in the excessive space is dropped to a certain degree.
The pressure relief space enables high-pressure high-temperature gas in the crankcase to enter the pressure relief space before being discharged, and gas pressure and gas temperature are relieved; the risk coefficient of the invention in the exhaust process is further reduced; the filtering piece of the oil seal cover plays a role in preventing oil and gas from being filtered, and prevents greasy dirt from blocking the vent hole on the oil seal cover, so that the venting and pressure relief effects of the invention are better, and the high temperature and high pressure in the crankcase are effectively released.
The position of the filtering piece can be further limited by the arrangement of the inner gland, so that the integral structure of the invention is more stable; meanwhile, an internal pressure cover opening is formed in the internal pressure cover, and the internal pressure cover opening corresponds to the air inlet hole, so that the influence of the internal pressure cover on the high-pressure air entering into the pressure relief space through the air inlet hole is avoided.
The position of the inner gland is further limited by the arrangement of the inner gland limiting block, so that the overall stability of the structure of the invention is improved; meanwhile, the inner gland is limited by the way that the inner gland limiting block enters the air inlet hole, and other limiting structures are avoided being additionally arranged, so that the structure of the invention is simpler and more obvious, and the installation is convenient.
The inner gland and the oil seal cover body are connected through the screw, so that when the oil and gas filtering prevention effect of the filter element is poor, the filter element can be replaced by detaching the inner gland, the maintenance cost and the use cost of the invention are lower, and the filter element is more convenient to replace, time-saving and labor-saving.
Drawings
Fig. 1 is a cross-sectional view of a hammer pick product.
Fig. 2 is a sectional view of the gear engagement area.
Fig. 3 is a diagram of the structure of the controllable pressure relief hole.
Fig. 4 is a view showing a structure of a relief valve side of a crankcase.
Fig. 5 is a diagram of a side structure of a normally open relief hole of a crankcase.
Fig. 6 is a view showing the internal structure of the crankcase.
Fig. 7 is a view showing the structure of the oil seal cover.
Fig. 8 is a cross-sectional view of the oil seal cover.
Fig. 9 is a view showing the internal structure of the oil seal cover.
Fig. 10 is a side view of the cover.
Fig. 11 is a block diagram of the space inside the lock cover of the cover.
Fig. 12 is a view showing an end face structure of the inner gland.
Fig. 13 is a view showing an end face structure of the screw stopper of the inner gland.
Fig. 14 is a forward explosion view of the oil seal cover.
Fig. 15 is a reverse explosion view of the oil seal cover.
Fig. 16 is a view showing a structure in which the filter is assembled in the oil seal cover body.
Reference numerals in the drawings:
1. an oil seal cover body; 2. a filter; 3. a cover body; 4. a pressure relief column; 5. an inner gland; 6. a screw; 7. a rubber ring; 21. a filter element through hole; 31. sealing the inner space; 32. an exhaust hole; 33. a top plate; 34. a side plate; 35. a reinforcing block; 36. an assembly groove; 37. an oil seal cover groove; 38. tightening the groove; 41. the pressure relief space; 42. an air inlet hole; 43. an opening; 44. assembling a column; 45. an assembly space; 46. assembling a thread; 47. an inlet; 51. the gap is covered by the inner pressure; 52. an inner pressure cover limiting block; 53. the through hole of the inner pressure cover; 54. assembling a limiting part; 55. a screw limit part; 56. assembling a limit space; 57. a screw limit space; 100. a crankcase; 101. a conduction chamber; 102. a gear engagement zone; 103. a crankshaft active region; 104. a fuel filler; 105. an oil seal cover; 106. a filtering space; 110. a pressure relief hole; 111. a normally open pressure relief hole; 121. a controllable pressure relief vent; 122. a pressure release valve; 123. a controllable pressure relief air inlet; 124. a controllable pressure relief vent; 125. excessive space; 126. a first region; 127. a second region; 131. a filtering inlet; 132. and (3) filtering the outlet.
Detailed Description
The invention will be further described with reference to the drawings and specific examples. It should be noted that the examples are only specific to the present invention and are for the purpose of better understanding of the technical solutions of the present invention to those skilled in the art, and should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, as the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used for convenience of description and simplicity of description, only as to the orientation or positional relationship shown in the drawings, and not as an indication or suggestion that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
Example 1:
as shown in fig. 1-16, a pressure release structure is arranged on a hammer pick product, and comprises a crankcase 100, wherein a conducting chamber 101 is arranged in the crankcase 100, the conducting chamber 101 comprises a gear meshing area 102 and a crankshaft active area 103, and the gear meshing area 102 is communicated with the crankshaft active area 103; the crankshaft active area 103 is provided with an oil filler 104 and a corresponding oil seal cover 105; the oil seal cover 105 includes an oil seal cover body 1, and an exhaust hole 32 is provided on the oil seal cover body 1; a pressure relief hole 110 is also provided in the gear engagement region 102; the pressure relief hole 110 comprises a normally open pressure relief hole 111 which is normally open and a controllable pressure relief hole 121 which is provided with a valve body; the exhaust hole 32 is arranged on the oil seal cover 105 of the hammer pick product, and the pressure relief hole 110 is arranged on the gear meshing area 102, so that the hammer pick product has a plurality of pressure relief points, and the pressure relief efficiency is further improved; the pressure release hole 110 comprises a normally open pressure release hole 111 and a controllable pressure release hole 121, wherein the normally open pressure release hole 111 enables the hammer product to release pressure when pressure and temperature are generated, so that the pressure release is started when the pressure and temperature in the equipment are in a higher state, and the hammer product is safer; simultaneously controllable pressure release hole 121's setting, further assurance is assembled the security that has hammer pick product, and pressure and temperature in the equipment are too high, can not be through normally opening pressure release hole 111 stable time, can carry out the pressure release through controllable pressure release hole 121, and then guarantee that pressure and temperature in the equipment are in invariable numerical value for hammer pick product can be more stable and safe.
The normally open pressure relief hole 111 and the controllable pressure relief hole 121 are arranged on different surfaces of the gear meshing zone 102, so that the normally open pressure relief hole 111 and the controllable pressure relief hole 121 can perform pressure relief more uniformly and avoid the mutual influence of the two when pressure relief work is performed simultaneously; normally open pressure release hole 111 and controllable pressure release hole 121 all set up in the upper half of gear engagement zone 102, normally, the higher gaseous top of gaseous general being in the lower gas of temperature, consequently normally open pressure release hole 111 and controllable pressure release hole 121 all set up in the upper half of gear engagement zone 102, can accelerate the pressure release efficiency of equipment through this phenomenon.
In this embodiment, the normally open pressure release hole 111 and the controllable pressure release hole 121 are disposed on two sides of the gear engagement area 102, and the number of the normally open pressure release hole 111 and the controllable pressure release hole 121 is one; the number of the normally open pressure relief holes 111 and the controllable pressure relief holes 121 can be increased under the condition that the pressure relief efficiency of the product needs to be improved, so that the pressure relief efficiency of the hammer pick product is ensured.
In this embodiment, the valve body is a relief valve 122, and the opening and closing of the controllable relief hole 121 are controlled by the relief valve 122; the pressure release valve 122 can be automatically opened and closed according to the pressure, and once the pressure is exceeded, the pressure release valve 122 can be fully opened to release the pressure in time, otherwise, the pressure release valve is in a closed state; the relief valve 122 enables the controllable relief orifice 121 to be opened and closed as desired and enables the steps of opening and closing to be more accurate.
In some other schemes, a pressure sensor can be arranged in the corresponding high-pressure space, and the opening and closing of the controllable pressure relief hole 121 can be controlled by manually poking a valve according to the value of the sensor.
In this embodiment, the inner diameter of the controllable pressure relief hole 121 is larger than the inner diameter of the normally open pressure relief hole 111, so that when the controllable pressure relief hole 121 is opened, high-temperature and high-pressure gas can be rapidly discharged to complete the pressure relief process; the pressure and temperature inside the hammer pick product are at normal values.
The normally open pressure relief hole 111 is also provided with a filter element 2, and the normally open pressure relief hole 111 plays a role in preventing oil and gas from being filtered through the filter element 2, so that pressure relief difficulty caused by oil stains blocking the normally open pressure relief hole 111 is avoided; the filter element is arranged in the normally open pressure relief hole or arranged at the position of the conduction chamber corresponding to the normally open pressure relief hole.
In this embodiment, a filtering space 106 is provided in the gear meshing area 102, the filter element 2 is disposed in the filtering space 106, and the filtering space 106 is provided to make the filter element 2 with the normally open pressure release hole 111 more firm and stable during assembly; the filtering space 106 is communicated with the normally open pressure relief hole 111 and the gear meshing zone 102; the filtering space 106 comprises a filtering inlet 131 and a filtering outlet 132, the filtering outlet 132 is communicated with the normally open pressure relief hole, the filtering inlet 131 is arranged at one end of the filtering space 106 corresponding to the lower half part of the gear meshing zone 102, and the filtering inlet 131 faces the lower half part of the gear meshing zone 102, when the temperature of the gas in the gear meshing zone 102 is gradually increased and the pressure is gradually increased, the gas is increased, and then the high-pressure gas in the gear meshing zone 102 is conveniently introduced into the filtering space 106.
In this embodiment, the filter inlet 131 is located at a lower elevation than the normally open pressure relief aperture 111 and the controllable pressure relief aperture 121; the filtering space 106 is columnar, the filtering outlet 132 is arranged on the side surface of the filtering space 106, and the filtering inlet 131 is arranged on the bottom surface of the filtering space 106; facilitating the gas temperature of the gear engagement zone 102 to gradually rise and the pressure to gradually increase into the filter space 106.
In this embodiment, the controllable pressure relief vent 121 includes a controllable pressure relief air inlet 123, a controllable pressure relief air outlet 124, and an excess space 125; the transition space 125 is arranged between the controllable pressure relief air inlet 123 and the controllable pressure relief air outlet 124, the controllable pressure relief air inlet 123 is communicated with the gear meshing zone 102, the controllable pressure relief air outlet 124 is communicated with the external space, and the pressure relief valve 122 is arranged at the controllable pressure relief air outlet 124; wherein the provision of excess space 125 enables more precise triggering of relief valve 122; when the pressure and temperature in the gear engagement region 102 gradually rise, high-pressure gas enters the excessive space 125, the relief valve 122 starts to operate after the gas pressure in the excessive space 125 rises to a certain degree, and the relief valve 122 stops operating after the gas pressure in the excessive space 125 falls to a certain degree.
In this embodiment, the excessive space 125 is in a truncated cone shape, and includes a first area 126 and a second area 127, where the first area 126 is communicated with the second area 127, one end of the first area 126 away from the second area 127 is communicated with the controllable pressure relief air inlet 123, and one end of the second area 127 away from the first area 126 is communicated with the controllable pressure relief air outlet 124; the inner diameter of the first area 126 is smaller than that of the second area 127, and the inner diameter of the first area 126 is gradually increased, and the larger inner diameter end of the first area 126 is communicated with the second area 127; so that the high-pressure gas can be completely discharged, and the influence of gas residues in the excessive space 125 on the operation judgment of the pressure relief valve 122 is avoided.
In this embodiment, the end of the normally open pressure relief hole far away from the conduction chamber is in a shape of a truncated cone, and the end with the larger inner diameter is communicated with the outside, so that the high-pressure gas in the normally open pressure relief hole 111 can be smoothly discharged.
The oil seal cover 105 comprises an oil seal cover body 1, and the exhaust hole 32 is arranged on the oil seal cover body 1; a pressure relief space 41 is arranged in the oil seal cover body 1; the pressure relief space 41 enables the high-pressure high-temperature gas in the crankcase 100 to enter the pressure relief space 41 before being discharged, so as to relieve the gas pressure and the gas temperature; the risk coefficient of the hammer pick product in the exhaust process is further reduced; the oil seal cover body 1 is also provided with an air inlet hole 42, and the air inlet hole 42 and the air outlet hole 32 are arranged on different sides of the pressure relief space 41; the air inlet hole 42 is communicated with the crankshaft active area 103; the oil seal cover 105 further comprises a filter element 2, the filter element 2 is arranged in the pressure relief space 41, the filter element 2 of the oil seal cover 105 plays a role in oil resistance and air filtration, and oil stains are prevented from blocking the exhaust hole 32 on the oil seal cover 105, so that the pressure relief effect of the hammer pick product is better, and the high temperature and high pressure in the crankcase 100 are effectively relieved; filter element 2 is positioned between vent hole 32 and inlet hole 42; the provision of the intake hole 42 facilitates the high pressure gas in the crankcase 100 to enter the pressure relief space 41 and be discharged through the exhaust hole 32; the filter element 2 is positioned between the exhaust hole 32 and the air inlet hole 42, so that the filter element 2 can play a role in preventing oil and air from being filtered, and the exhaust hole 32 on the oil seal cover 105 is prevented from being blocked by greasy dirt.
The oil seal 105 also includes an inner gland 5; an opening 43 is formed in the pressure release space 41, and the inner pressure cover 5 is assembled at the opening 43; the position of the filter element 2 can be further limited by the arrangement of the inner gland 5, so that the integral structure of the hammer pick product is more stable; meanwhile, an inner pressure cover opening 51 is formed in the inner pressure cover 5, and the inner pressure cover opening 51 is arranged corresponding to the air inlet hole 42, so that the inner pressure cover 5 is prevented from influencing the high-pressure air to enter the pressure relief space 41 through the air inlet hole 42; the opening 43 and the air inlet hole 42 are arranged on the same side of the pressure relief space 41; an inner pressure cover opening 51 corresponding to the air inlet is arranged on the inner pressure cover 5; the size of the internal pressure cover gap 51 is larger than that of the air inlet hole 42, so that the high-pressure air is prevented from entering the pressure relief space 41 through the air inlet hole 42 due to the influence of the internal pressure cover 5; of course, the size of the internal pressure cap notch 51 may be equal to the size of the air intake hole 42; at least one inner pressure cover limiting block 52 is arranged on the inner pressure cover 5, an inlet 47 is arranged at one end of the air inlet hole 42 far away from the air outlet hole 32, and the inner pressure cover limiting block 52 enters the air inlet hole 42 through the inlet 47; in the embodiment, two inner pressure cover limiting blocks 52 are arranged on the outer surface of the inner pressure cover 5, and the two inner pressure cover limiting blocks 52 are symmetrically arranged, so that the inner pressure cover 5 is more firmly and stably assembled; in this embodiment, the size of the inner pressure cover limiting block 52 is smaller than the size of the air inlet hole 42, so that high-pressure air is prevented from entering the pressure release space 41 through the air inlet hole 42; the position of the inner pressure cover 5 is further limited by the arrangement of the inner pressure cover limiting block 52, and the overall stability of the structure is improved; meanwhile, the inner gland 5 is limited by the way that the inner gland limiting block 52 enters the air inlet hole 42, so that other limiting structures are avoided, the structure of the hammer pick product is simpler and clearer, and the hammer pick product is convenient to install.
The inner gland 5 is connected with the oil seal cover body 1 through the screw 6, so that when the oil and gas prevention and filtration effects of the filter element 2 are poor, the filter element 2 can be replaced by disassembling the inner gland 5, the maintenance cost and the use cost of a hammer pick product are lower, and the filter element 2 is replaced more conveniently, time and labor are saved; an assembly column 44 is arranged in the pressure relief space 41, an assembly space 45 is arranged in the assembly column 44, and an assembly thread 46 is arranged on the inner surface of the assembly space 45; the filter element 2 is provided with a filter element through hole 21 for the fitting column 44 to pass through; an inner pressure cover through hole 53 through which the screw 6 passes is provided on the inner pressure cover 5; an assembly limiting part 54 is arranged on the end face, close to the oil seal cover body 1, of the inner gland through hole 53, and a screw limiting part 55 is arranged on the end face, far away from the oil seal cover body 1, of the inner gland through hole 53; the inner diameters of the assembly limiting part 54 and the screw limiting part 55 are larger than the inner diameter of the inner pressure cover through hole 53, and are arranged around the inner pressure cover through hole 53; the assembly limiting part 54 surrounds and forms an assembly limiting space 56, the inner diameter of the assembly limiting space 56 corresponds to the outer diameter of the assembly column 44, and one end of the assembly column 44 enters the assembly limiting space 56; the screw limiting part 55 surrounds and forms a screw limiting space 57, and when the rod part of the screw 6 passes through the inner pressure cover through hole 53 and enters the assembly space 45, the head part of the screw 6 enters the screw limiting space 57; the setting of assembly spacing portion 54 and screw spacing portion 55 makes the assembly of interior gland 5 more firm stable, and then promotes hammer pick product bulk strength for hammer pick product is more durable, and is difficult for appearing becoming flexible in the use.
The oil seal cover body 1 comprises a cover body 3 and a pressure relief column 4; the cover body 3 includes a top plate 33 and a side plate 34, the side plate 34 is provided on the lower surface of the top plate 33 and around the top plate 33, the top plate 33 and the side plate 34 enclose a cover inner space 31; the pressure relief column 4 is arranged in the cover inner space 31, and the pressure relief space 41 is arranged in the pressure relief column 4; one end of the pressure release column 4 is connected with the lower surface of the top plate 33; the exhaust hole 32 is arranged at a position of the top plate 33 corresponding to the pressure relief space 41 and is communicated with the pressure relief space 41 and the external space of the pressure relief oil seal cover 105; the air inlet hole 42 is arranged on the side surface of the pressure relief column 4 and is communicated with the pressure relief space 41 and the inner space 31 of the sealing cover; in the embodiment, the cover body 3 and the pressure release column 4 are cylindrical, so that the hammer pick product and the filter element 2 are convenient to assemble; the center point of the cover body 3 is coincident with the center point of the pressure relief column 4, so that the pressure relief column 4 and the pressure relief space 41 can be positioned in the center of the cover inner space 31, and high-pressure gas in the crankcase 100 can uniformly enter the pressure relief space 41; a reinforcing block 35 is also arranged in the inner space 31 of the sealing cover, one end of the reinforcing block 35 is connected with the inner surface of the side plate 34, the other end of the reinforcing block 35 is connected with the side surface of the pressure relief column 4, and one side surface of the reinforcing block 35 is connected with the lower surface of the top plate 33; the provision of the reinforcing block 35 further enhances the overall strength of the hammer pick product; an assembling groove 36 is provided on the outer surface of the side plate 34, and an oil seal cover groove 37 is provided at one end of the assembling groove 36 near the top plate 33; still be provided with rubber circle 7, rubber circle 7 cover is in oil blanket lid recess 37, and rubber circle 7 plays the shock attenuation, and is locking, sealed effect, avoids oil blanket 105 to fly to split, causes the injury to people or thing.
In this embodiment, the filtering pieces 2 are made of wool material, so that the effect of filtering greasy dirt is better through the advantages of good elasticity, strong hygroscopicity and the like of wool.
Example 2:
in this embodiment, the normally open pressure relief holes 111 are distributed in the upper half of the conductive chamber 101; the inner diameter of the normally open pressure release hole 111 is smaller than the diameter of the oil molecules in the conduction chamber 101; the function of the filter element 2 is achieved by reducing the inner diameter of the normally open pressure relief hole 111; it should be noted that, when the pressure relief effect is not good, the number of the normally open pressure relief holes 111 can be increased or decreased according to the requirement, and the inner diameter of the normally open pressure relief holes 111 can be increased or decreased.
Other technical solutions of this embodiment are the same as those of embodiment 1.
It should be noted that other technical solutions of the present invention are all the prior art, so they are not described in detail.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the concept of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the present invention.
Claims (6)
1. The pressure relief structure is arranged on mechanical equipment and comprises a crank case, wherein a conduction chamber is arranged in the crank case and comprises a gear meshing area and a crank shaft moving area, and the gear meshing area is communicated with the crank shaft moving area; the oil filling device is characterized in that an oil filling port is arranged in the crankshaft active area, and a corresponding oil sealing cover is arranged; the oil seal cover comprises an oil seal cover body, and an exhaust hole is formed in the oil seal cover body; the gear meshing area is also provided with a pressure relief hole; the pressure relief hole comprises a normally open pressure relief hole which is normally open and a controllable pressure relief hole provided with a valve body;
a pressure relief space is arranged in the oil seal cover body; the oil seal cover body is also provided with an air inlet hole, and the air inlet hole and the air outlet hole are arranged at different sides of the pressure relief space;
the oil seal cover also comprises a filter element, and the filter element is arranged in the pressure relief space; the filter element is positioned between the exhaust hole and the air inlet hole;
the oil seal cover also comprises an inner gland; an opening is arranged in the pressure relief space, and the inner pressure cover is assembled at the opening; the opening and the air inlet are arranged on the same side of the pressure relief space; an internal pressure cover opening corresponding to the air inlet is formed in the internal pressure cover; at least one inner pressure cover limiting block is arranged on the inner pressure cover, an inlet is arranged at one end of the air inlet, which is far away from the exhaust hole, of the inner pressure cover limiting block, and the inner pressure cover limiting block enters the air inlet through the inlet; the inner gland and the oil seal cover body are connected through screws; an assembly column is arranged in the pressure relief space, an assembly space is arranged in the assembly column, and assembly threads are arranged on the inner surface of the assembly space; a filter piece through hole for the assembly column to pass through is arranged on the filter piece; an inner pressure cover through hole for a screw to pass through is formed in the inner pressure cover; an assembly limiting part is arranged on the end face, close to the oil seal cover body, of the inner gland through hole, and a screw limiting part is arranged on the end face, far away from the oil seal cover body, of the inner gland through hole; the inner diameters of the assembly limiting part and the screw limiting part are both larger than the inner diameter of the inner pressure cover through hole, and are arranged around the inner pressure cover through hole; the assembly limiting part surrounds the assembly limiting space, the inner diameter of the assembly limiting space corresponds to the outer diameter of the assembly column, and one end of the assembly column enters the assembly limiting space; the screw limiting part surrounds the screw limiting space, and when the rod part of the screw passes through the inner gland through hole and enters the assembly space, the head part of the screw enters the screw limiting space;
the oil seal cover body comprises a cover body and a pressure relief column; the cover body comprises a top plate and a side plate, the side plate is arranged on the lower surface of the top plate and surrounds the top plate, and the top plate and the side plate surround to form a cover inner space; the pressure relief column is arranged in the space in the sealing cover, and the pressure relief space is arranged in the pressure relief column; one end of the pressure release column is connected with the lower surface of the top plate; the exhaust hole is arranged at the position of the top plate corresponding to the pressure relief space and is communicated with the pressure relief space and the external space of the pressure relief oil seal cover; the air inlet hole is arranged on the side surface of the pressure relief column and is communicated with the pressure relief space and the space in the sealing cover; a reinforcing block is further arranged in the inner space of the sealing cover, one end of the reinforcing block is connected with the inner surface of the side plate, the other end of the reinforcing block is connected with the side surface of the pressure relief column, and one side surface of the reinforcing block is connected with the lower surface of the top plate; the outer surface of the side plate is provided with an assembling grain, and one end, close to the top plate, of the assembling grain is provided with an oil seal cover groove; the oil seal cover is also provided with a rubber ring which is sleeved in the oil seal cover groove.
2. The pressure relief structure of claim 1, wherein the normally open pressure relief vent and the controllable pressure relief vent are disposed on different sides of the gear engagement region; the normally open pressure relief hole and the controllable pressure relief hole are both arranged on the upper half part of the gear meshing zone.
3. A pressure relief structure according to claim 2, wherein the valve body is a pressure relief valve; the normally open pressure relief hole is also provided with a filter.
4. A pressure relief structure according to claim 3, wherein the normally open pressure relief vent comprises a pressure relief inlet and a pressure relief outlet; the filter element is arranged between the pressure relief inlet and the pressure relief outlet or is arranged at the position of the gear meshing zone corresponding to the pressure relief inlet.
5. The pressure relief structure according to claim 4, wherein a filter space is provided in the gear engagement region, and wherein the filter is disposed in the filter space; the filtering space is communicated with the normally open pressure relief hole and the gear meshing area; the filtering space comprises a filtering inlet and a filtering outlet, the filtering outlet is communicated with the pressure relief inlet, and the filtering inlet is arranged at one end of the filtering space corresponding to the lower half part of the gear meshing zone.
6. A pressure relief structure according to claim 3, wherein the controllable pressure relief vent comprises a controllable pressure relief air inlet, a controllable pressure relief air outlet, and excess space; the transition space is arranged between the controllable pressure relief air inlet and the controllable pressure relief air outlet, the controllable pressure relief air inlet is communicated with the gear meshing area, the controllable pressure relief air outlet is communicated with the external space, and the pressure relief valve is arranged at the controllable pressure relief air outlet; the transition space comprises a first area and a second area, the first area is communicated with the second area, one end of the first area, which is far away from the second area, is communicated with the controllable pressure relief air inlet, and one end of the second area, which is far away from the first area, is communicated with the controllable pressure relief air outlet; the inner diameter at the first region is smaller than the inner diameter at the second region, and the inner diameter at the first region gradually increases; the larger inner diameter end of the first area is communicated with the second area.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210280896.8A CN114603519B (en) | 2022-03-21 | 2022-03-21 | Pressure relief structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210280896.8A CN114603519B (en) | 2022-03-21 | 2022-03-21 | Pressure relief structure |
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| Publication Number | Publication Date |
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| CN114603519A CN114603519A (en) | 2022-06-10 |
| CN114603519B true CN114603519B (en) | 2024-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210280896.8A Active CN114603519B (en) | 2022-03-21 | 2022-03-21 | Pressure relief structure |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10110810A (en) * | 1996-10-04 | 1998-04-28 | Honda Motor Co Ltd | Lubricant leakage preventive structure for equipment and its demounting device |
| CN211371236U (en) * | 2020-01-17 | 2020-08-28 | 范小蓉 | Pressure relief structure for engine gearbox |
| DE202022100342U1 (en) * | 2021-02-08 | 2022-02-17 | Nanjing Chervon Industry Co., Ltd. | electric hammer |
| CN217530754U (en) * | 2022-03-21 | 2022-10-04 | 浙江信源电器制造有限公司 | Pressure relief structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5560004B2 (en) * | 2009-08-05 | 2014-07-23 | 株式会社マキタ | Work tools |
-
2022
- 2022-03-21 CN CN202210280896.8A patent/CN114603519B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10110810A (en) * | 1996-10-04 | 1998-04-28 | Honda Motor Co Ltd | Lubricant leakage preventive structure for equipment and its demounting device |
| CN211371236U (en) * | 2020-01-17 | 2020-08-28 | 范小蓉 | Pressure relief structure for engine gearbox |
| DE202022100342U1 (en) * | 2021-02-08 | 2022-02-17 | Nanjing Chervon Industry Co., Ltd. | electric hammer |
| CN217530754U (en) * | 2022-03-21 | 2022-10-04 | 浙江信源电器制造有限公司 | Pressure relief structure |
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| Publication number | Publication date |
|---|---|
| CN114603519A (en) | 2022-06-10 |
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