CN114603519A

CN114603519A - Pressure relief structure

Info

Publication number: CN114603519A
Application number: CN202210280896.8A
Authority: CN
Inventors: 黄端俊; 王晓波; 何晓兵; 王小日; 李坚忠
Original assignee: Zhe Jiang Xin Yuan Electric Appliance Manufacture Co ltd
Current assignee: Zhe Jiang Xin Yuan Electric Appliance Manufacture Co ltd
Priority date: 2022-03-21
Filing date: 2022-03-21
Publication date: 2022-06-10
Anticipated expiration: 2042-03-21
Also published as: CN114603519B

Abstract

The invention discloses a pressure relief structure, which comprises an oil seal cover, a gear meshing area and a crankshaft active area, wherein the oil seal cover is arranged on the oil seal cover; 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 has a plurality of pressure relief points, and the pressure relief efficiency can be improved; the pressure relief holes comprise normally open pressure relief holes and controllable pressure relief holes, wherein the normally open pressure relief holes enable the equipment provided with the pressure relief device to perform pressure relief work when pressure and temperature are generated, and the pressure relief device is prevented from being started when the pressure intensity and the temperature in the equipment are in a high state, so that the equipment provided with the pressure relief device is safer; meanwhile, the arrangement of the controllable pressure relief hole further ensures the safety of the equipment provided by the invention, when the pressure and the temperature in the equipment are too high and cannot be stabilized through the normally open pressure relief hole, the pressure can be relieved through the controllable pressure relief hole, so that the pressure and the temperature in the equipment are ensured to be in constant values, and the equipment provided by the invention can be more stable and safer.

Description

Pressure relief structure

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, air is compressed, and a punching hammer is driven to transmit continuous impact force to the pick drill rod and the bottom of a drill bit, so that a solid object is crushed; in general, in order to protect transmission devices such as gears and the like from transmitting mechanical energy, a transmission chamber is arranged in the hammer pick, and the transmission devices are arranged in the transmission chamber; in the process that a user uses the product for a long time, the phenomena of flying crack of an oil seal cover, carbonization of grease and the like, high destructive power and possibility of hurting people and objects are found due to high temperature and high pressure in a crankcase and a conduction chamber, so that the hammer pick is required to be provided with a corresponding pressure relief structure to release the high temperature and high pressure in the crankcase; the pressure relief structure of the hammer pick on the market is generally provided with only one pressure relief structure, so that the pressure relief efficiency is low, and the pressure relief structure generally starts to relieve the pressure only when the internal pressure reaches a certain strength, so that the pressure and the temperature in the hammer pick are in a dangerous state, and therefore the pressure relief structure capable of relieving the pressure in real time and having a certain pressure relief efficiency is needed;

and there is not pressure release structure usually on the oil blanket of hammer pick on the current market, perhaps some seal closures that have pressure release structure can't be fine grease proofing strain gas for the exhaust hole on the oil blanket lid is blocked up to the greasy dirt, leads to the pressure release ability not enough.

Disclosure of Invention

The invention overcomes the defects of the prior art and provides the pressure relief structure which is simple in structure, reasonable in design, higher in pressure relief efficiency and safer in volume.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a pressure relief structure is arranged on mechanical equipment and comprises a crankcase, wherein a conduction chamber is arranged in the crankcase and comprises a gear meshing area and a crankshaft active area, and the gear meshing area is communicated with the crankshaft active 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; a pressure relief hole is also formed in the gear meshing area; the pressure relief hole comprises a normally open pressure relief hole and a controllable pressure relief hole 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 area; the normally open pressure relief hole and the controllable pressure relief hole are both arranged in the upper half part of the gear meshing area.

Further, the valve body is a pressure relief valve; the normally open pressure relief hole is also provided with a filter piece.

Furthermore, the filtering piece 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.

Furthermore, 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 area.

Further, the controllable pressure relief hole comprises a controllable pressure relief air inlet, a controllable pressure relief air outlet and a transition 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 on 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, far away from the second area, is communicated with the controllable pressure relief air inlet, and one end of the second area, 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 end of the first area with larger inner diameter is communicated with the second area.

Further, the oil seal cover comprises an oil seal cover body, and the exhaust hole is formed in 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, and the air inlet and the air outlet are arranged on different sides of the pressure relief space.

Further, the oil seal cover also comprises a filter element which is arranged in the pressure relief space; the filtering piece 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 gland is assembled at the opening; the opening and the air inlet are arranged on the same side of the pressure relief space; an inner gland notch corresponding to the air inlet is arranged on the inner gland; at least one inner gland limiting block is arranged on the inner pressure cover, an inlet is formed in one end, away from the exhaust hole, of the air inlet, and the inner gland 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 an assembly thread is arranged on the inner surface of the assembly space; a filter member through hole for the assembly column to pass through is formed in the filter member; an inner gland through hole for a screw to pass through is formed in the inner pressure cover; the end face of the inner gland through hole, which is close to the oil seal cover body, is provided with an assembly limiting part, and the end face of the inner gland through hole, which is far away from the oil seal cover body, is provided with a screw limiting part; the inner diameters of the assembly limiting part and the screw limiting part are both larger than the inner diameter of the inner gland through hole and are arranged around the inner gland through hole; the assembly limiting part surrounds to form an 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 to form a screw limiting space, and when the rod part of the screw penetrates through the inner gland through hole to enter the assembling 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 sealing 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 relief 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 is arranged on the side surface of the pressure relief column and communicated with the pressure relief space and the space in the sealing cover; a reinforcing block is further arranged in the space in 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; and a rubber ring is also arranged and sleeved in the groove of the oil seal cover.

The invention has the beneficial effects that:

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 has a plurality of pressure relief points, and the pressure relief efficiency can 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 pressure relief device to perform pressure relief work when pressure and temperature are generated, and pressure relief is prevented from being started when the pressure intensity and the temperature in the equipment are in a high state, so that the equipment provided with the pressure relief device is safer; meanwhile, the arrangement of the controllable pressure relief hole further ensures the safety of the equipment provided by the invention, when the pressure and the temperature in the equipment are too high and cannot be stabilized by normally opening the pressure relief hole, the pressure relief can be carried out through the controllable pressure relief hole, so that the pressure and the temperature in the equipment are ensured to be in constant values, and the equipment provided by 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 area, so that when the normally open pressure relief hole and the controllable pressure relief hole perform pressure relief work simultaneously, the pressure relief can be performed more uniformly, and the mutual influence of the normally open pressure relief hole and the controllable pressure relief hole can be avoided; and generally speaking, the gas with higher temperature is usually positioned above the gas with lower temperature, so that the normally open pressure relief hole and the controllable pressure relief hole are both arranged at the upper half part of the gear meshing area, 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 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 opening and closing steps can be more accurate; normally open the pressure release hole and still be provided with and filter and play grease-proof gas filtering effect, avoid the greasy dirt to plug up normally open the pressure release hole and lead to the pressure release difficulty.

The arrangement of the filtering space ensures that the filtering piece of the normally open pressure relief hole is more firm and stable in assembly; when the temperature rises gradually and the pressure intensity becomes larger gradually, the gas in the gear meshing area 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 area, so that the high-pressure gas in the gear meshing area can enter the filtering space conveniently.

The controllable pressure relief hole comprises a controllable pressure relief air inlet, a controllable pressure relief air outlet and a transition space; the arrangement 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 area gradually rise, high-pressure gas enters the transition space, the pressure relief valve starts to work after the gas pressure in the transition space rises to a certain degree, and the pressure relief valve stops working after the gas pressure in the transition space falls to a certain degree.

The pressure relief space enables high-pressure and high-temperature gas in the crankcase to enter the pressure relief space before being exhausted, so that the gas pressure and the gas temperature are relieved; the danger coefficient of the invention in the exhaust process is further reduced; the filtering piece of the oil seal cover plays a role in oil-proof air filtration, and oil stains are prevented from blocking the exhaust hole in the oil seal cover, so that the exhaust and pressure relief effect is better, and high temperature and high pressure in the crankcase are effectively released.

The position of the filter element can be further limited by the arrangement of the inner gland, so that the integral structure of the filter element is more stable; meanwhile, an inner gland notch is formed in the inner pressure cover and corresponds to the air inlet hole, and therefore the inner pressure cover is prevented from influencing high-pressure air to enter a pressure relief space through the air inlet hole.

The arrangement of the inner gland limiting block further limits the position of the inner gland, and the integral stability of the structure is improved; meanwhile, the inner gland is limited in a mode that the inner gland limiting block enters the air inlet, and other limiting structures are avoided being additionally arranged, so that the structure is simpler and more clear, and the installation is convenient.

The inner gland and the oil seal cover body are connected through the screw, so that when the oil-proof air filtering effect of the filtering piece is poor, the inner gland can be detached to replace the filtering piece, the maintenance cost and the use cost of the oil-proof air filtering device are lower, and the filtering piece is more convenient to replace, time-saving and labor-saving.

Drawings

Fig. 1 is a sectional structure view of a hammer pick product.

Fig. 2 is a sectional view of a gear meshing area.

FIG. 3 is a diagram of a structure of a controllable pressure relief vent.

Fig. 4 is a structure view of a relief valve side of the crankcase.

Fig. 5 is a view showing a structure of a normally open relief hole side of the crankcase.

Fig. 6 is a structure view of the inside of the crankcase.

Fig. 7 is a view showing the structure of an oil seal cover.

Fig. 8 is a cross-sectional view of the oil seal cover.

Fig. 9 is a view showing an internal structure of the oil cover.

Fig. 10 is a side view of the cover.

Fig. 11 is a view showing the internal space of the lock cover of the cover body.

Fig. 12 is a structural view of an end face where an assembly stopper of the inner gland is located.

Fig. 13 is a structural view of an end face where a screw stopper of the inner gland is located.

Fig. 14 is a front exploded view of the oil cap.

Fig. 15 is a reverse exploded view of the oil cap.

Fig. 16 is a view showing the filter member assembled in the oil cover body.

The reference numbers in the figures:

1. an oil seal cover body; 2. a filter member; 3. a cover body; 4. a pressure relief column; 5. an inner gland; 6. a screw; 7. a rubber ring; 21. a filter member through hole; 31. closing the inner space; 32. an exhaust hole; 33. a top plate; 34. a side plate; 35. a reinforcing block; 36. assembling a groove; 37. sealing the groove with oil; 38. screwing down the groove; 41. a pressure relief space; 42. an air inlet; 43. an opening; 44. assembling the column; 45. an assembly space; 46. assembling threads; 47. an inlet; 51. an inner gland gap; 52. an inner gland limiting block; 53. an inner gland through hole; 54. assembling a limiting part; 55. a screw limiting part; 56. assembling a limiting space; 57. a screw limiting space; 100. a crankcase; 101. a conduction chamber; 102. a gear engagement zone; 103. a crankshaft active region; 104. an oil filler; 105. sealing the oil cover; 106. filtering the space; 110. a pressure relief vent; 111. a normally open pressure relief vent; 121. a controllable pressure relief vent; 122. a pressure relief valve; 123. a controllable pressure relief air inlet; 124. a controllable pressure relief vent; 125. a transition space; 126. a first region; 127. a second region; 131. a filtration inlet; 132. and (6) filtering an outlet.

Detailed Description

The invention is further described with reference to the following figures and specific examples. It should be noted that the examples are only for specifically illustrating the present invention, and the purpose thereof is to make the technical solution of the present invention better understood by 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 the orientations or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred devices or elements 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 to 16, a pressure relief structure is provided for a hammer pick product, and includes a crankcase 100, a conduction chamber 101 is provided in the crankcase 100, the conduction chamber 101 includes a gear engagement area 102 and a crankshaft active area 103, and the gear engagement area 102 is communicated with the crankshaft active area 103; the crankshaft active area 103 is provided with an oil filling port 104 and a corresponding oil sealing cover 105; the oil seal cover 105 comprises an oil seal cover body 1, and the oil seal cover body 1 is provided with an exhaust hole 32; a pressure relief hole 110 is also formed in the gear meshing area 102; the pressure relief hole 110 comprises a normally open pressure relief hole 111 and a controllable pressure relief hole 121 provided with a valve body; the oil seal cover 105 of the hammer pick product is provided with the exhaust hole 32, and the gear meshing area 102 is provided with the pressure relief hole 110, so that the hammer pick product has a plurality of pressure relief points, and the pressure relief efficiency can be further improved; the pressure relief holes 110 comprise normally open pressure relief holes 111 and controllable pressure relief holes 121, wherein the normally open pressure relief holes 111 enable the hammer pick product to perform pressure relief work when pressure and temperature are generated, and the situation that the pressure and the temperature in the equipment begin to relieve pressure when the pressure and the temperature are in a high state is avoided, so that the hammer pick product is safer; meanwhile, the safety of the hammer pick product is guaranteed to be assembled through the arrangement of the controllable pressure relief holes 121, the pressure and the temperature in the equipment are too high, the pressure and the temperature cannot be stabilized through the normally-opened pressure relief holes 111, the pressure can be relieved through the controllable pressure relief holes 121, the pressure and the temperature in the equipment are guaranteed to be in a constant value, and the 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 area 102, so that when the normally open pressure relief hole 111 and the controllable pressure relief hole 121 perform pressure relief work simultaneously, pressure relief can be performed more uniformly, and mutual influence between the normally open pressure relief hole 111 and the controllable pressure relief hole can be avoided; normally open pressure release hole 111 and controllable pressure release hole 121 and all set up in the first half of gear engagement area 102, generally speaking, the higher gas of temperature is usually in the lower gaseous top of temperature, consequently normally open pressure release hole 111 and controllable pressure release hole 121 and all set up in the first half of gear engagement area 102, can accelerate the pressure release efficiency of equipment through this phenomenon.

In this embodiment, the normally open pressure relief hole 111 and the controllable pressure relief hole 121 are disposed on two sides of the gear engagement area 102, and the number of the normally open pressure relief hole 111 and the controllable pressure relief hole 121 is one; the quantity 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 guaranteed.

In the present embodiment, the valve body is a pressure relief valve 122, and the opening and closing of the controllable pressure relief hole 121 is controlled by the pressure relief valve 122; the pressure release valve 122 can be automatically opened and closed according to the pressure, once the pressure is excessive, 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; relief valve 122 allows controllable relief vent 121 to be opened and closed as needed, and allows the opening and closing steps to be more precise.

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 are controlled by a valve which is manually pushed 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 the temperature in the hammer pick product are kept at normal values.

The normally open pressure relief hole 111 is also provided with a filter element 2, the normally open pressure relief hole 111 plays a role in oil-proof air filtration through the filter element 2, and pressure relief difficulty caused by oil stain blocking the normally open pressure relief hole 111 is avoided; the filtering piece 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 the embodiment, the filtering space 106 is arranged in the gear meshing area 102, the filtering element 2 is arranged in the filtering space 106, and the arrangement of the filtering space 106 enables the filtering element 2 with the normally open pressure relief hole 111 to be assembled more firmly and stably; the filtering space 106 is communicated with the normally open pressure relief hole 111 and the gear meshing area 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 area 102, and the filtering inlet 131 faces to the lower half part of the gear meshing area 102, when the temperature of the gas in the gear meshing area 102 gradually rises and the pressure gradually increases, the gas will rise, and therefore the high-pressure gas in the gear meshing area 102 can conveniently enter the filtering space 106.

In this embodiment, the height of the filtering inlet 131 is lower than the heights of the normally open pressure relief hole 111 and the controllable pressure relief hole 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; so that the gas in the gear meshing area 102 can enter the filtering space 106 when the temperature gradually rises and the pressure gradually increases.

In the present embodiment, the controllable pressure relief hole 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 area 102, the controllable pressure relief air outlet 124 is communicated with the external space, and the pressure relief valve 122 is arranged on the controllable pressure relief air outlet 124; wherein the provision of excess space 125 enables more precise triggering of pressure relief valve 122; when the pressure and temperature in the gear meshing area 102 gradually increase, high-pressure gas enters the transition space 125, the relief valve 122 starts to operate when the gas pressure in the transition space 125 increases to a certain degree, and the relief valve 122 stops operating when the gas pressure in the transition space 125 falls to a certain degree.

In this embodiment, the transition space 125 is in a circular truncated cone shape, and includes a first area 126 and a second area 127, 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, the inner diameter of the first area 126 is gradually increased, and the end with the larger inner diameter of the first area 126 is communicated with the second area 127; the high-pressure gas can be completely discharged, and the working judgment that the gas residue in the excessive space 125 affects the pressure release valve 122 is avoided.

In this embodiment, the end of the normally open pressure release hole away from the conduction chamber is in the shape of a circular truncated cone, and the end with the larger inner diameter is communicated with the outside, so as to ensure that the high-pressure gas in the normally open pressure release 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 decompression space 41 enables high-pressure and high-temperature gas in the crankcase 100 to enter the decompression space 41 before being exhausted, so that the gas pressure and the gas temperature are relieved; the danger 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 42, and the air inlet 42 and the air outlet 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-proof air filtration, and oil stains are prevented from blocking the exhaust hole 32 in the oil seal cover 105, so that the air exhaust and pressure relief effects of the hammer pick product are better, and high temperature and high pressure in the crankcase 100 are further effectively relieved; filter element 2 is located between air outlet aperture 32 and air inlet aperture 42; the air inlet hole 42 is arranged to facilitate the high-pressure air in the crankcase 100 to enter the decompression space 41 and be exhausted through the exhaust hole 32; the filter element 2 is positioned between the air exhaust hole 32 and the air inlet hole 42, so that the filter element 2 plays a role of oil-proof air filtration, and oil stains are prevented from blocking the air exhaust hole 32 on the oil seal cover 105.

The oil cover 105 further includes an inner gland 5; an opening 43 is provided in the relief space 41, and the inner gland 5 is fitted 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 overall structure of the hammer pick product is more stable; meanwhile, an inner gland notch 51 is formed in the inner gland 5, and the inner gland notch 51 is arranged corresponding to the air inlet hole 42, so that high-pressure air is prevented from entering the pressure relief space 41 through the air inlet hole 42 by the inner gland 5; the opening 43 and the intake hole 42 are provided on the same side of the relief space 41; an inner gland notch 51 corresponding to the air inlet is arranged on the inner gland 5; the size of the inner gland notch 51 is larger than that of the air inlet hole 42, so that the inner gland 5 is prevented from influencing the high-pressure air to enter the pressure relief space 41 through the air inlet hole 42; of course, the size of the inner gland notch 51 can also be equal to the size of the air inlet hole 42; at least one inner gland limiting block 52 is arranged on the inner gland 5, an inlet 47 is arranged at one end of the air inlet hole 42 far away from the exhaust hole 32, and the inner gland limiting block 52 enters the air inlet hole 42 through the inlet 47; in this embodiment, two inner gland limiting blocks 52 are arranged on the outer surface of the inner gland 5, and the two inner gland limiting blocks 52 are symmetrically arranged, so that the inner gland 5 is assembled more firmly and stably; in addition, in this embodiment, the size of the inner gland limiting block 52 is smaller than that of the air inlet hole 42, so as to avoid affecting the high-pressure air entering the pressure relief space 41 through the air inlet hole 42; the position of the inner gland 5 is further limited by the arrangement of the inner gland limiting block 52, and the overall stability of the structure is improved; meanwhile, the inner gland 5 is limited in a mode that the inner gland limiting block 52 enters the air inlet 42, and other limiting structures are avoided being additionally arranged, so that the structure of the hammer pick product is simpler and clearer, and the hammer pick 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-proof air filtering effect of the filter piece 2 is poor, the inner gland 5 can be disassembled to replace the filter piece 2, the maintenance cost and the use cost of a hammer pick product are lower, and the replacement of the filter piece 2 is more convenient, time-saving and labor-saving; a fitting post 44 is provided in the relief space 41, a fitting space 45 is provided in the fitting post 44, and a fitting thread 46 is provided on an inner surface of the fitting space 45; the filter member 2 is provided with a filter member through hole 21 through which the fitting post 44 passes; an inner gland through hole 53 for the screw 6 to pass through is arranged on the inner gland 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 both larger than the inner diameter of the inner gland through hole 53 and are arranged around the inner gland through hole 53; the assembly limiting part 54 surrounds to form 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 to form a screw limiting space 57, and when the rod part of the screw 6 passes through the inner gland through hole 53 to enter the assembling space 45, the head part of the screw 6 enters the screw limiting space 57; the arrangement of the assembling limiting part 54 and the screw limiting part 55 enables the assembling of the inner gland 5 to be more firm and stable, and further improves the overall strength of the hammer pick product, so that the hammer pick product is more durable and is not easy to loosen in the using process.

The oil seal cover body 1 comprises a cover body 3 and a pressure relief column 4; the lid body 3 includes a top plate 33 and a side plate 34, the side plate 34 is disposed on the lower surface of the top plate 33 and disposed around the top plate 33, and the top plate 33 and the side plate 34 surround to form a lid inner space 31; the pressure relief column 4 is arranged in the cap inner space 31, and the pressure relief space 41 is arranged in the pressure relief column 4; one end of the pressure relief column 4 is connected with the lower surface of the top plate 33; the exhaust hole 32 is arranged at the 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 communicated with the pressure relief space 41 and the cap inner space 31; in the embodiment, the cover body 3 and the pressure relief column 4 are both cylindrical, so that the assembly of the hammer pick product and the assembly of the filter piece 2 are facilitated; the central point of the cover body 3 is overlapped with the central point of the pressure relief column 4, so that the pressure relief column 4 and the pressure relief space 41 can be positioned at the center of the cover sealing inner space 31, and high-pressure gas in the crankcase 100 can uniformly enter the pressure relief space 41; a reinforcing block 35 is further provided in the cap inner space 31, one end of the reinforcing block 35 is connected to the inner surface of the side plate 34, the other end of the reinforcing block 35 is connected to the side surface of the pressure release column 4, and one side surface of the reinforcing block 35 is connected to the lower surface of the top plate 33; the reinforcing block 35 is provided to further enhance the overall strength of the hammer pick product; a fitting 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 fitting groove 36 close to the top plate 33; still be provided with rubber circle 7, rubber circle 7 cover is in oil seal lid recess 37, and rubber circle 7 plays the shock attenuation, and is locking, sealed effect, avoids oil seal lid 105 to fly to split, causes the injury to people or thing.

In this embodiment, filter piece 2 all adopts the wool material, through advantages such as wool elasticity is good, the hygroscopicity is strong for the effect of filtering the greasy dirt is better.

Example 2:

in the present embodiment, the normally open pressure relief hole 111 is distributed in the upper half of the conduction chamber 101; the inner diameter of the normally open pressure relief hole 111 is smaller than the diameter of 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 may be increased or decreased according to the requirement, and the inner diameter of the normally open pressure relief holes 111 may also be increased or decreased.

Other technical solutions of the present 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, and therefore, are not described in detail.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A pressure relief structure is arranged on mechanical equipment and comprises a crankcase, wherein a conduction chamber is arranged in the crankcase and comprises a gear meshing area and a crankshaft active area, and the gear meshing area is communicated with the crankshaft active 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; a pressure relief hole is also formed in the gear meshing area; the pressure relief hole comprises a normally open pressure relief hole and a controllable pressure relief hole provided with a valve body.

2. The pressure relief structure according to claim 1, wherein the normally open pressure relief hole and the controllable pressure relief hole are disposed on different sides of the gear meshing area; the normally open pressure relief hole and the controllable pressure relief hole are both arranged in the upper half part of the gear meshing area.

3. The 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 piece.

4. The pressure relief structure according to claim 3, wherein the filtering element is disposed in the normally open pressure relief hole, or in a position of the conduction chamber corresponding to the normally open pressure relief hole.

5. The pressure relief structure according to claim 4, wherein a filtering space is provided in the gear engagement area, and a filtering member is provided 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 area.

6. The pressure relief structure according to claim 3, wherein the controllable pressure relief hole comprises a controllable pressure relief air inlet, a controllable pressure relief air outlet and a transition 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 on 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, far away from the second area, is communicated with the controllable pressure relief air inlet, and one end of the second area, 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 end of the first region with the larger inner diameter is communicated with the second region.

7. The pressure relief structure according to claim 1, wherein the oil seal cover comprises an oil seal cover body, and the vent hole is formed in 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, and the air inlet and the air outlet are arranged on different sides of the pressure relief space.

8. The pressure relief structure according to claim 7, wherein said oil seal cover further comprises a filter member, said filter member being disposed in said pressure relief space; the filtering piece is positioned between the exhaust hole and the air inlet hole.

9. The pressure relief structure according to claim 8, wherein the oil seal cover further comprises an internal gland; an opening is arranged in the pressure relief space, and the inner gland is assembled at the opening; the opening and the air inlet are arranged on the same side of the pressure relief space; an inner gland notch corresponding to the air inlet is arranged on the inner gland; at least one inner gland limiting block is arranged on the inner pressing cover, an inlet is arranged at one end of the air inlet hole, which is far away from the exhaust hole, and the inner gland limiting block enters the air inlet hole 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 an assembly thread is arranged on the inner surface of the assembly space; a filter member through hole for the assembly column to pass through is formed in the filter member; an inner gland through hole for a screw to pass through is formed in the inner pressure cover; the end face of the inner gland through hole, which is close to the oil seal cover body, is provided with an assembly limiting part, and the end face of the inner gland through hole, which is far away from the oil seal cover body, is provided with a screw limiting part; the inner diameters of the assembly limiting part and the screw limiting part are both larger than the inner diameter of the inner gland through hole and are arranged around the inner gland through hole; the assembly limiting part surrounds to form an 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 to form a screw limiting space, and when the rod part of the screw penetrates through the inner gland through hole to enter the assembling space, the head part of the screw enters the screw limiting space.

10. The pressure relief structure according to claim 7, wherein the oil seal cover body comprises a cover body and a pressure relief pillar; 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 sealing 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 relief 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 space in 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; and a rubber ring is also arranged and sleeved in the groove of the oil seal cover.