Automatic oil injector for high-pressure breaking hammer

Abstract

The utility model relates to an automatic oil injector for a high-pressure breaking hammer. The automatic oil injection device structurally comprises a grease tank which is arranged on a main valve body of the automatic oil injection device, and the automatic oil injection device mainly structurally comprises that a grease injection oil control valve is connected with a hydraulic oil pressure relief control valve through a third hydraulic oil channel. The grease injection liquid control valve comprises a grease storage sleeve, a grease outlet sleeve, a one-way ball valve, a one-way valve spring, an upper pressure spring, an inner piston, an outer piston and the like. The hydraulic oil pressure relief control valve structure comprises a lower valve sleeve, a lower pressure spring, a pressure relief valve element and a pressure adjusting ejector rod. And the pressure release valve core is a two-position two-way valve core shaft with a limit. Compared with the prior art, the automatic oil injector of the high-pressure breaking hammer has the advantages of being time-saving and labor-saving in operation, capable of achieving automatic suction and extrusion of oil, capable of releasing pressure instantly and rapidly achieving re-lubrication, even in oil injection, stable, reliable, low in maintenance work and cost and good in economic benefit.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil automatic filling equipment, especially a high-pressure breaking hammer automatic oiler matched with a full hydraulic excavator. BACKGROUND

[0002] At present, the high-pressure breaking hammer is a common tool for full hydraulic excavator construction, and the high-pressure breaking hammer is used frequently. In order to ensure the normal service life of the breaking hammer, lubricating oil must be intermittently injected between the bushing and the drill rod for lubrication. Most of the existing lubrication methods are manually injecting oil through a manual grease gun or a simple oil filler device. Due to the poor construction environment on site, especially in cold or hot seasons, the ambient temperature can reach -30℃ to +50℃. Such equipment has the following defects: long oil injection interval, uneven oil injection interval and oil injection amount, and high labor intensity. In addition, a small number of imported high-end breaking hammers use a hydraulic drive method for injection, that is, the medium-pressure oil in the oil cavity of the equipment drives the outer piston and the inner piston to inject the oil. In order to quickly release the oil, the breaking hammer is designed to have a complex special oil passage structure inside the breaking hammer body. Such equipment has the following defects: not only is the internal special oil passage structure expensive, but also the oiling equipment has a narrow application range and is not suitable for domestic high-pressure breaking hammers, which has a low market share. SUMMARY

[0003] The technical task of the utility model is to solve the above problems, and provide a high-pressure breaking hammer automatic oiler which can automatically inject oil and instantaneously release pressure.

[0004] The technical scheme adopted by the utility model to solve the technical problems is as follows: the high-pressure breaking hammer automatic oiler of the utility model, the structure comprises an oil tank and an automatic oil injection device, the oil tank is arranged on a total valve body of the automatic oil injection device and is sealed with the total valve body through an O-shaped sealing ring, and an oil inlet of the oil tank is arranged at a lower part of the oil tank.

[0005] The automatic oil injection device structure mainly comprises: an oil injection hydraulic control valve connected with a hydraulic oil pressure relief control valve through a third hydraulic oil passage.

[0006] A thread of an upper valve seat at one end of the oil injection hydraulic control valve is fixedly connected with the total valve body, and an adjusting nut is arranged on the thread of the upper valve seat. An upper valve sleeve of the oil injection hydraulic control valve is installed in the total valve body, a positioning pin shaft is arranged between the upper valve sleeve and the total valve body, and the upper valve sleeve and the total valve body are connected. An oil storage sleeve is installed at one end of an inner cavity of the upper valve sleeve, and an inner cavity of the oil storage sleeve and the inner cavity of the upper valve sleeve form an oil seal cavity. An oil outlet sleeve is installed in the oil storage sleeve, and the oil storage sleeve is provided with an O-shaped sealing ring. One end of the oil outlet sleeve is fixed in the upper valve seat. The oil outlet sleeve is provided with a one-way ball valve and a one-way valve spring, and the one-way valve spring abuts against the one-way ball valve.

[0007] The oil inlet of the oil seal cavity is connected with the oil inlet of the oil seal cavity.

[0008] The upper pressure spring is sleeved on the upper valve sleeve at one end, and is fixed on the cross slot spring seat at the other end, and the cross slot spring seat is connected with the inner piston by screw thread. The inner piston is arranged in the outer piston. The inner piston and the outer piston communicate with the grease sealing cavity.

[0009] The outer thread of the inner hexagonal plug is connected with the total valve body.

[0010] The upper valve sleeve is provided with the outer piston in the inner cavity.

[0011] The grease outlet is arranged on the total valve body and communicates with the grease oil cavity; the grease oil cavity communicates with the grease channel, and the grease channel is arranged on the oil outlet sleeve; and the hydraulic oil third channel is connected with the hydraulic oil third cavity.

[0012] The hydraulic oil pressure relief control valve structure comprises: a lower valve sleeve of the hydraulic oil pressure relief control valve is arranged in the total valve body and is fixedly connected with the total valve body by screw thread. The lower valve sleeve is provided with a lower pressure spring, and each end of the lower pressure spring is provided with a spring seat. The lower valve sleeve is provided with a pressure relief valve spool at one end, the pressure relief valve spool is in contact with the spring seat at one end, and the lower valve sleeve is provided with a lower valve seat at the other end and is connected by screw thread. The lower valve seat is provided with a pressure adjusting top rod and is connected by screw thread. The pressure adjusting top rod is in contact with the spring seat at one end. The pressure adjusting top rod is provided with a locking nut at the other end.

[0013] The high-pressure hydraulic oil inlet is arranged on the total valve body and communicates with the hydraulic oil first cavity; the hydraulic oil first channel and the hydraulic oil second channel are small holes on the lower valve sleeve; and the hydraulic oil outlet is arranged on the total valve body and communicates with the hydraulic oil second cavity.

[0014] The inner piston is in the shape of a stepped shaft structure.

[0015] The outer piston is in the shape of a stepped structure.

[0016] The pressure relief valve spool is a two-position two-way valve core shaft with a limit.

[0017] The lower valve sleeve is a two-position three-way structure with pressure adjustment.

[0018] Compared with the prior art, the high-pressure breaking hammer automatic oil injector has the following characteristics:

[0019] I. By setting the grease injection hydraulic control valve, the automatic opening and closing of the grease sealing cavity and the automatic suction and extrusion of the grease are realized.

[0020] II. By setting the hydraulic oil pressure control valve, solve the problem of slow pressure drop of domestic breaking hammer automatic oiler caused by high pressure and large size of high pressure breaking hammer, realize the oil pressure can be quickly reduced in the very short working gap, and then can suck in the grease, when the breaking hammer works again, it can realize lubrication again, overcome the disadvantage that the original domestic breaking hammer cannot realize lubrication due to the oil pressure reduction not in place in the short working gap.

[0021] III. By setting the pressure adjusting top rod on the hydraulic oil pressure control valve, the pressure adjusting top rod can be adjusted by adjusting the length of the thread screwed in, the compression force of the lower pressure spring can be adjusted, and the pressure value of the oil discharge can be adjusted.

[0022] IV. By setting the pressure relief valve core, the pressure relief valve core can be moved to open or close the oil inlet and return passage of the lower valve sleeve, achieve uniform oil injection and good lubrication effect, solve the problem of uneven time and long oil injection interval of relative manual oil injection. BRIEF DESCRIPTION OF DRAWINGS

[0023] The utility model is further described below in combination with the drawings.

[0024] Figure 1 It is a perspective structural schematic view of the high pressure breaking hammer automatic oiler;

[0025] Figure 2 It is a front view sectional structure schematic view of the automatic oil injection device of the high pressure breaking hammer automatic oiler;

[0026] Figure 3 It is a top view structure schematic view of the automatic oil injection device of the high pressure breaking hammer automatic oiler;

[0027] Figure 4 It is a left view structure schematic view of the automatic oil injection device of the high pressure breaking hammer automatic oiler;

[0028] Figure 5 It is a front view sectional structure schematic view of the hydraulic oil pressure control valve of the high pressure breaking hammer automatic oiler;

[0029] Figure 6 It is a top view structure schematic view of the hydraulic oil pressure control valve of the high pressure breaking hammer automatic oiler;

[0030] Figure 7 It is a left view structure schematic view of the hydraulic oil pressure control valve of the high pressure breaking hammer automatic oiler;

[0031] Figure 8 It is a perspective structural schematic view of the hydraulic oil pressure control valve of the high pressure breaking hammer automatic oiler;

[0032] Figure 9The main view section structure schematic diagram of grease injection hydraulic control valve of high pressure breaking hammer automatic oiler;

[0033] Figure 10 The top view structure schematic diagram of grease injection hydraulic control valve of high pressure breaking hammer automatic oiler;

[0034] Figure 11 The left view structure schematic diagram of grease injection hydraulic control valve of high pressure breaking hammer automatic oiler;

[0035] Figure 12 The three-dimensional structure schematic diagram of grease injection hydraulic control valve of high pressure breaking hammer automatic oiler;

[0036] Figure 13 The structure schematic diagram of grease injection state one of high pressure breaking hammer automatic oiler;

[0037] Figure 14 The local enlarged view of hydraulic oil first channel and hydraulic oil second channel part of high pressure breaking hammer automatic oiler state one;

[0038] Figure 15 The structure schematic diagram of grease injection state two of high pressure breaking hammer automatic oiler;

[0039] Figure 16 The local enlarged view of hydraulic oil first channel and hydraulic oil second channel part of high pressure breaking hammer automatic oiler state two;

[0040] Figure 17 The structure schematic diagram of automatic grease suction state of high pressure breaking hammer automatic oiler;

[0041] Figure 18 The local enlarged view of hydraulic oil first channel and hydraulic oil second channel part of high pressure breaking hammer automatic oiler automatic grease suction state;

[0042] Figure 19 The structure schematic diagram of high pressure breaking hammer automatic oiler and breaking hammer connection;

[0043] In the figure: 1, grease tank, 2, automatic oil injection device, 3, total valve body, 4, grease injection hydraulic control valve, 5, hydraulic oil pressure relief control valve, 6, internal hexagonal plug, 7, positioning pin shaft, 8, pressure adjusting top rod, 9, locking nut, 10, lower valve seat, 11, lower valve sleeve, 12, spring seat, 13, lower pressure spring, 14, pressure relief valve core, 15, working pedal, 16, cross slot spring seat, 17, upper pressure spring, 18, inner piston, 19, outer piston, 20, upper valve sleeve, 21, breaking hammer, 22, one-way ball valve, 23, oil storage sleeve, 24, oil outlet sleeve, 25, adjusting nut, 26, upper valve seat, 27, one-way valve spring, 28, hydraulic oil drain port, 29, high-pressure hydraulic oil inlet port, 30, hydraulic oil first channel, 31, hydraulic oil second channel, 32, hydraulic oil first oil cavity, 33, hydraulic oil second oil cavity, 34, hydraulic oil third channel, 35, hydraulic oil third oil cavity, 36, grease oil outlet, 37, grease oil cavity, 38, grease channel, 39, grease inlet, 40, grease sealing cavity, 41, oil tank. DETAILED DESCRIPTION

[0044] The high-pressure breaking hammer automatic oil injector is described in detail below with reference to the accompanying drawings.

[0045] The high-pressure breaking hammer automatic oil injector of the utility model, the structure includes grease tank 1 and automatic oil injection device 2. The grease tank 1 is arranged on the total valve body 3 of the automatic oil injection device 2 and is sealed with the total valve body 3 through an O-shaped sealing ring. The grease inlet 39 is arranged at the lower part of the grease tank 1. During operation, the lubricating grease in the grease tank 1 enters the automatic oil injection device 2 through the grease inlet 39. After the grease is used up, the grease tank 1 can be replaced at any time.

[0046] The automatic oil injection device 2 mainly comprises a grease injection hydraulic control valve 4 connected with a hydraulic oil pressure relief control valve 5 through a hydraulic oil third channel 34.

[0047] The outer thread of the upper valve seat 26 at one end of the grease injection hydraulic control valve 4 is fixedly connected with the total valve body 3, and the adjusting nut 25 is arranged on the outer thread of the upper valve seat 26. The length of the thread into which the upper valve seat 26 is screwed can be changed through the action of the adjusting nut 25. The upper valve sleeve 20 of the grease injection hydraulic control valve 4 is installed in the total valve body 3, the positioning pin shaft 7 is arranged between the upper valve sleeve 20 and the total valve body 3, and the upper valve sleeve 20 and the total valve body 3 are connected. The inner cavity of the upper valve sleeve 20 is provided with the oil storage sleeve 23 at one end, and the inner cavity of the oil storage sleeve 23 forms the grease sealing cavity 40 with the inner cavity of the upper valve sleeve 20. The oil storage sleeve 23 is internally provided with the oil outlet sleeve 24, and the oil storage sleeve 23 is provided with an O-shaped sealing ring, so as to ensure the sealing of the oil storage sleeve 23 and the oil outlet sleeve 24. The oil outlet sleeve 24 is fixed at one end in the upper valve seat 26, and the oil outlet sleeve 24 can move left and right with the upper valve seat 26, so as to adjust the volume of the grease sealing cavity 40, and thus adjust the oil injection amount each time. The oil outlet sleeve 24 is internally provided with the one-way ball valve 22 and the one-way valve spring 27, the one-way valve spring 27 abuts against the one-way ball valve 22, so as to ensure the one-way flow of the grease and prevent backflow. The oil outlet sleeve 24 is fixed in the upper valve seat 26 through a hole and a steel wire retainer.

[0048] During operation, the volume of the grease sealing cavity 40 can be adjusted by adjusting the stroke of the thread of the upper valve seat 26, so as to adjust the oil injection amount each time, and the grease injection hydraulic control valve 4 is locked through the adjusting nut 25. The positioning pin shaft 7 can ensure the correct installation position of the grease injection hydraulic control valve 4 and the total valve body 3, so as to make the grease inlet 39 communicate with the oil inlet of the grease sealing cavity 40.

[0049] The upper pressure spring 17 is sleeved at one end on the upper valve sleeve 20 and is fixed at the other end on the cross groove spring seat 16, the cross groove spring seat 16 is connected with the inner piston 18 through threads, the cross groove on the cross groove spring seat 16 ensures that the cross groove spring seat 16 can also enter the high-pressure hydraulic oil at the end part, so as to generate a thrust force. The inner piston 18 is installed in the outer piston 19. The inner piston 18 and the outer piston 19 communicate with the grease sealing cavity 40.

[0050] The inner hexagonal plug 6 is connected with the total valve body 3 through the outer thread, and the inner hexagonal plug 6 can plug the cross groove spring seat 16.

[0051] The outer piston 19 is arranged in the inner cavity of the upper valve sleeve 20 and can slide in the upper valve sleeve 20. The inner piston 18 is installed in the outer piston 19. The outer piston 19 and the inner piston 18 are sealed by using a groove and an O-shaped sealing ring.

[0052] The upper valve sleeve 20 is provided with an O-shaped sealing ring, so as to ensure the sealing of the upper valve sleeve 20, the total valve body 3, the oil storage sleeve 23 and the outer piston 19.

[0053] Grease outlet 36 is arranged on the total valve body 3, and communicates with the grease oil cavity 37; the grease oil cavity 37 communicates with the grease channel 38, and the grease channel 38 is arranged on the oil outlet sleeve 24 and communicates with the grease oil cavity 37 through the small hole arranged on the oil outlet sleeve 24; the hydraulic oil third channel 34 is connected with the hydraulic oil third cavity 35.

[0054] The hydraulic oil pressure relief control valve 5 comprises: a lower valve sleeve 11 of the hydraulic oil pressure relief control valve 5 is installed in the total valve body 3 and is fixedly connected with the total valve body 3 through screw threads. The lower valve sleeve 11 is provided with an O-shaped sealing ring, so as to ensure the sealing of the lower valve sleeve 11 and the total valve body 3. The lower valve sleeve 11 is provided with a lower pressure spring 13, and the lower pressure spring 13 is provided with a spring seat 12 at each end. The lower valve sleeve 11 is provided with a pressure relief valve spool 14 at one end, and the pressure relief valve spool 14 is in contact with the spring seat 12 at one end. The lower valve sleeve 11 is provided with a lower valve seat 10 at the other end and is connected through screw threads. The lower valve seat 10 is provided with a pressure adjusting top rod 8 and is connected through screw threads. The pressure adjusting top rod 8 is in contact with the spring seat 12 at one end, and the pressure of the lower pressure spring 13 can be adjusted by adjusting the screw thread stroke of the pressure adjusting top rod 8, so that the pressure of the oil discharge can be adjusted. The pressure adjusting top rod 8 is provided with a locking nut 9 at the other end, and the locking nut 9 locks the pressure adjusting top rod 8 on the lower valve seat 10.

[0055] The high-pressure hydraulic oil inlet 29 is arranged on the total valve body 3 and communicates with the hydraulic oil first cavity 32; the hydraulic oil first channel 30 and the hydraulic oil second channel 31 are small holes on the lower valve sleeve 11; and the hydraulic oil discharge port 28 is arranged on the total valve body 3 and communicates with the hydraulic oil second cavity 33.

[0056] The inner piston 18 is in the shape of a stepped shaft structure.

[0057] The outer piston 19 is in the shape of a stepped structure.

[0058] The pressure relief valve spool 14 is a two-position two-way valve core shaft with a limit.

[0059] The lower valve sleeve 11 is a two-position three-way structure with pressure adjustment.

[0060] In use, the oil injection steps are divided into three steps.

[0061] Oil injection state one:

[0062] When working, step on the working pedal 15 of the breaking hammer. The breaking hammer 21 starts working. The high-pressure hydraulic oil of the breaking hammer enters the high-pressure hydraulic oil inlet 29, then enters the hydraulic oil first oil cavity 32, overcomes the pressure of the lower pressure spring 13, pushes the pressure relief valve spool 14 to move left, the pressure relief valve spool 14 closes the hydraulic oil second passage 31 and opens the hydraulic oil first passage 30, at this time the hydraulic oil first passage 30 and the hydraulic oil third passage 34 are communicated, the high-pressure hydraulic oil enters the hydraulic oil third oil cavity 35. When the high-pressure hydraulic oil enters the hydraulic oil third oil cavity 35, overcomes the pressure of the upper pressure spring 17, the outer piston 19 drives the inner piston 18 to move right at the same time, pushes the oil in the oil seal cavity 40 to move to the oil outlet 36, and the outer piston 19 seals the oil inlet 39.

[0063] The second oil injection state is:

[0064] When the outer piston 19 seals the oil inlet 39, the inner piston 18 continues to move quickly in the oil seal cavity 40, pushes the oil in the oil seal cavity 40 to pass through the one-way ball valve 22, the oil passage 38, the oil oil cavity 37, and the oil is discharged from the oil outlet 36, enters the breaking hammer lubrication point through the lubricating oil pipeline, and is lubricated. The breaking hammer 21 continues to work. The device maintains pressure.

[0065] The third oil injection state is an automatic oil suction state:

[0066] Loosen the working pedal 15 of the breaking hammer, the breaking hammer 21 stops working, and enters the working gap. The oil pressure in the pipeline of the breaking hammer 21 gradually decreases, when the pressure of the lower pressure spring 13 is greater than the set oil pressure, generally 150-250 Kg, the lower pressure spring 13 pushes the spring seat 12 to move right, and the pressure relief valve spool 14 moves right together under the push of the spring seat 12. The pressure relief valve spool 14 closes the hydraulic oil first passage 30 and opens the hydraulic oil second passage 31, at this time the hydraulic oil second passage 31 and the hydraulic oil third passage 34 are communicated, the high-pressure hydraulic oil existing in the hydraulic oil third oil cavity 35 passes through the hydraulic oil third passage 34 and the hydraulic oil second passage 31 into the hydraulic oil oil cavity 33 at once, and returns to the breaking hammer 21 return pipeline and the oil tank 41 from the hydraulic oil drain 28, and the pressure decreases to the return back pressure value at once.

[0067] When the pressure of the high-pressure hydraulic oil in the hydraulic oil third oil cavity 35 decreases to the return back pressure value, under the action of the spring pressure 17, the inner piston 18 drives the outer piston 19 to move left quickly, opens the oil inlet 39, and the volume of the oil seal cavity 40 changes from small to large quickly, forming a local vacuum. Under the action of atmospheric pressure, the oil in the oil tank 1 is sucked into the oil seal cavity 40. Thus a working cycle is completed.

[0068] When the work pedal 15 is stepped on again, the breaking hammer 21 starts working again, and when the high-pressure hydraulic oil pressure of the breaking hammer rises again, the utility model starts oil injection work again.

[0069] The utility model adopts double valve structure: grease injection hydraulic control valve 4 and hydraulic oil pressure relief control valve 5. The sealing problem of the grease sealing cavity 40 is solved, and the functions of automatic opening and closing of the grease sealing cavity 40 and automatic suction and extrusion of grease are realized. The structure is simple, and the work is reliable. The high-pressure hydraulic oil of the breaking hammer can be accurately controlled through the hydraulic oil pressure relief control valve 5, and the function of instantaneous pressure relief can be achieved.

[0070] The hydraulic oil pressure relief control valve 5 can maintain the working pressure when the breaking hammer 21 works after the utility model injects oil, and can quickly relieve pressure when the breaking hammer 21 works intermittently, so as to realize quick automatic grease injection when the breaking hammer 21 works again. Quick pressure relief does not need a special pressure relief oil channel in the breaking hammer, which saves the manufacturing cost of the special pressure relief oil channel in the breaking hammer of the prior art.

[0071] The oil injection amount of the utility model can be adjusted, and the oil injection amount of each time can be adjusted according to different working conditions and breaking hammer models. It can be applied to different working environments and breaking hammers of different specifications.

[0072] The oil injection amount of the utility model can be adjusted, and the oil injection amount of each time can be adjusted according to different working conditions and breaking hammer models. It can be applied to different working environments and breaking hammers of different specifications.

[0072] The oil injection amount of the utility model can be adjusted, and the oil injection amount of each time can be adjusted according to different working conditions and breaking hammer models. It can be applied to different working environments and breaking hammers of different specifications. The utility model has the characteristics of automatic oil injection, uniform oil injection, stability and reliability. It ensures that the oil injection amount can be accurately adjusted according to the dosage in each working period. It not only saves the labor of the operator, reduces the labor cost, but also significantly prolongs the service life of the bushing, the drill rod and the piston, prolongs the replacement period of the parts, reduces the maintenance work and cost, and significantly improves the economic benefit.

Claims

1. The automatic oil injector of high pressure breaking hammer, the structure includes the grease tank (1) and the automatic oil injection device (2), it is characterized by: The oil tank (1) is arranged on the total valve body (3) of the automatic oil injection device (2) and is sealed with the total valve body (3) through an O-shaped sealing ring, and the oil inlet (39) is arranged at the lower part of the oil tank (1); The automatic oil injection device (2) mainly comprises an oil injection hydraulic control valve (4) connected with a hydraulic oil pressure relief control valve (5) through a third hydraulic oil channel (34). The upper valve seat (26) at one end of the oil injection hydraulic control valve (4) is fixedly connected with the total valve body (3) through screw threads, and an adjusting nut (25) is arranged on the screw threads of the upper valve seat (26); the upper valve sleeve (20) of the oil injection hydraulic control valve (4) is installed in the total valve body (3), a positioning pin shaft (7) is arranged between the upper valve sleeve (20) and the total valve body (3) and connects the upper valve sleeve (20) and the total valve body (3); an oil storage sleeve (23) is installed at one end of the inner cavity of the upper valve sleeve (20), and the inner cavity of the oil storage sleeve (23) and the inner cavity of the upper valve sleeve (20) form an oil seal cavity (40); an oil outlet sleeve (24) is installed in the oil storage sleeve (23), and the oil storage sleeve (23) is provided with an O-shaped sealing ring; one end of the oil outlet sleeve (24) is fixed in the upper valve seat (26); the oil outlet sleeve (24) is provided with a one-way ball valve (22) and a one-way valve spring (27), and the one-way valve spring (27) abuts against the one-way ball valve (22); The oil inlet (39) is communicated with the oil inlet of the oil seal cavity (40); One end of the upper pressure spring (17) is sleeved on the upper valve sleeve (20), and the other end is fixed on the cross slot spring seat (16), the cross slot spring seat (16) is connected with the inner piston (18) through screw threads; the inner piston (18) is installed in the outer piston (19); the inner piston (18) and the outer piston (19) are communicated with the oil seal cavity (40); The outer threads of the inner hexagonal plug (6) are connected with the total valve body (3); The inner cavity of the upper valve sleeve (20) is provided with the outer piston (19); The oil outlet (36) is arranged on the total valve body (3) and is communicated with the oil cavity (37); the oil cavity (37) is communicated with the oil channel (38), and the oil channel (38) is arranged on the oil outlet sleeve (24); the third hydraulic oil channel (34) is connected with the third hydraulic oil cavity (35).

2. The automatic oiler for high pressure breaking hammers according to claim 1, characterized in that: The hydraulic oil pressure relief control valve (5) comprises a lower valve sleeve (11) of the hydraulic oil pressure relief control valve (5) installed in the total valve body (3) and fixedly connected with the total valve body (3) through screw threads; the lower valve sleeve (11) is provided with a lower pressure spring (13) installed therein, and each end of the lower pressure spring (13) is provided with a spring seat (12); one end of the lower valve sleeve (11) is provided with a pressure relief valve spool (14), one end of the pressure relief valve spool (14) is in contact with the spring seat (12), the other end of the lower valve sleeve (11) is provided with a lower valve seat (10) connected through screw threads; the lower valve seat (10) is provided with a pressure adjusting jacking rod (8) installed therein and connected through screw threads; one end of the pressure adjusting jacking rod (8) is in contact with the spring seat (12); the other end of the pressure adjusting jacking rod (8) is provided with a locking nut (9). The high-pressure hydraulic oil inlet (29) is arranged on the total valve body (3) and communicates with the hydraulic oil first oil cavity (32); the hydraulic oil first channel (30) and the hydraulic oil second channel (31) are small holes on the lower valve sleeve (11); the hydraulic oil drain port (28) is arranged on the total valve body (3) and communicates with the hydraulic oil second oil cavity (33).

3. The automatic oiler for high pressure breaking hammers according to claim 1, characterized in that: The inner piston (18) is in the shape of a stepped shaft structure.

4. The automatic oiler for high pressure breaking hammers according to claim 1, characterized in that: The outer piston (19) is in the shape of a stepped structure.

5. The automatic oiler for high pressure breaking hammers according to claim 2, characterized in that: The pressure relief valve spool (14) is a two-position two-way spool shaft with a limit.

6. The automatic oiler for high pressure breaking hammers according to claim 2, characterized in that: The lower valve sleeve (11) is a two-position three-way structure with pressure regulation.

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