Shaft core oil supply lubricating device of press crankshaft copper tile
By integrating the oil and gas channel seat and the rolling bearing design, the problems of lubrication pipe failure and increased cost of traditional crankshaft copper bearing oil supply devices are solved, achieving uniform lubrication and system reliability, and improving the working accuracy and reliability of the press.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-31
- Publication Date
- 2026-03-27
AI Technical Summary
Traditional crankshaft copper bearing oil supply devices are prone to lubrication pipe failures and increase manufacturing costs. They also cannot effectively and evenly lubricate the friction pairs, affecting the reliability and accuracy of the press.
The independent oil and air passages are integrated into a single oil-air passage seat, which is fixed to the crankshaft. The oil supply connector is installed via a rolling bearing, keeping it stationary relative to the rotating oil-air passage seat. A circular oil groove and a sealing ring are provided to ensure that the lubricating oil is evenly distributed and precisely delivered to the friction pair through the oil holes inside the crankshaft.
It greatly simplifies the external pipeline layout, avoids pipeline twisting and fatigue fracture failures, improves the uniformity of lubrication and the long-term operational reliability of the system, and reduces the internal space occupation and manufacturing cost of the equipment.
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Figure CN121738992A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of press technology, and in particular to a shaft oil supply and lubrication device for the copper bearing of a press crankshaft. Background Technology
[0002] The press itself needs a clutch and brake unit to transmit the energy supplied by the motor, and this clutch and brake unit is mounted on the crankshaft. The clutch and brake unit can be configured according to the actual needs of the press, such as... Figure 8 The air passage is arranged on both sides of the crankshaft, as shown, but it can also be arranged individually on either the left or right side of the crankshaft. The air passage seat has an air passage N, which is mounted on the crankshaft with screws. The air passage seat is equipped with an air supply connector; gas enters the air passage on the air passage seat through the air supply connector and ultimately enters the clutch / brake unit. Due to the pressure of the airflow, the clutch / brake unit operates and drives the crankshaft to rotate, at which point the press actuates. To ensure the working accuracy and operational reliability of the press, a certain clearance must be maintained between the crankshaft and the crankshaft support copper bearings 4a, 4b, and 4c, and between the crankshaft and the crankshaft connecting rod copper bearings 5a and 5b. When the crankshaft rotates, relative sliding friction occurs between the crankshaft support copper bearings 4a, 4b, and 4c, the crankshaft connecting rod copper bearings 5a and 5b, and the crankshaft. This sliding friction generates heat. If the relatively sliding parts (hereinafter referred to as friction pairs) are not cooled, the friction pairs will expand due to the heat generated by friction. After expansion, the clearance between the friction pairs will shrink. This shrinkage can cause the copper bearings to overheat and be damaged; in severe cases, it may force a shutdown or even require repair, affecting production. Injecting lubricating oil into the friction pair is an effective way to cool it down.
[0003] Since the clutch and brake unit is an essential structure of the press, the traditional crankshaft bearing oil supply method, such as... Figure 8 As shown, the machine body oil supply holes 8a, 8b, and 8c can only be machined on the machine body, and the connecting rod oil supply holes 9, 9a, and 9b can be machined on the connecting rod. Then, external oil pipes are connected to the outside of the oil holes. The lubricating oil enters the crankshaft support copper bearings 4a, 4b, and 4c and the crankshaft connecting rod copper bearings 5a and 5b through the oil pipes and oil holes to achieve lubrication of the copper bearings.
[0004] like Figure 9 As shown, due to the eccentric structure of the connecting rod, it will continuously oscillate left and right during the operation of the press. Especially in high-speed presses, the oscillation frequency of the connecting rod increases significantly. Under high-frequency movement, the lubrication supply pipe installed on the connecting rod is very prone to fatigue damage or root joint breakage. Once a failure occurs, the lubrication of the copper bearing will be interrupted, directly causing the copper bearing to overheat and seize. At the same time, in order to store lubricating oil, such as Figure 11As shown, the inner hole of the copper shoe is processed with axial oil groove and ring oil groove, and the axial oil groove can have 2, 4 or more according to the size of the inner hole of the copper shoe. In order to make the external lubricating oil evenly enter the internal friction pair, the traditional crankshaft copper shoe oil supply method needs to additionally process a ring oil groove on the outer circle of the copper shoe, and process an oil hole in the body. On the basis of the inner ring oil groove, the outer ring oil groove is added, which greatly reduces the strength of the copper shoe itself. If the strength of the copper shoe is to be ensured, the wall thickness of the copper shoe needs to be increased. In this way, the manufacturing cost of the press machine is increased.
[0005] Therefore, the traditional crankshaft copper shoe oil supply device not only has the potential risk of oil pipe damage, but also has the pain of increased manufacturing cost. SUMMARY
[0006] The purpose of the present application is to provide a shaft core oil supply lubrication device for a press crankshaft copper shoe to solve the problems in the prior art.
[0007] The technical scheme of the present application is: a shaft core oil supply lubrication device for a press crankshaft copper shoe, the device comprising a clutch brake unit (1), a gas supply channel seat (2), a gas supply connector (3), an oil supply connector (31), an oil supply channel seat (33), and a crankshaft (35); the clutch brake unit (1) has only one group; The gas supply channel seat (2) is arranged on the right side of the crankshaft (35) and is used to supply gas to the clutch brake unit (1); the gas supply connector (3) is connected to the gas supply channel seat (2); the oil supply channel seat (33) is installed on the left side of the crankshaft (35) through screw threads; the oil supply connector (31) is connected to the oil supply channel seat (33) through rolling bearings (32a, 32b); the lubricating oil supply pipe (30) is connected to the oil supply connector (31); the inner hole of the oil supply connector (31) is provided with a ring oil groove; sealing rings (34a, 34b) are arranged at the ring oil groove; the oil supply channel seat (33) is provided with an oil channel M, which is in communication with the ring oil groove and is connected to the internal oil passage of the crankshaft (35) through the shaft core oil hole (17) of the crankshaft (35); the outer circle of the oil supply channel seat (33) is uniformly provided with a plurality of oil inlet holes; and the lubricating oil supply pipe (30) is arranged stationary.
[0008] A shaft core oil supply lubrication device for a press crankshaft copper shoe, the device comprising a gas supply connector (3), a machine body (13), a shaft core oil hole (17), a lubricating oil supply pipe (30), an oil supply connector (41), an oil and gas channel seat (44), a crankshaft (45), a pressure detection switch (90), and a clutch brake unit (80); the clutch brake unit (80) has two groups in total; The oil and gas passage seat (44) is fixed on the crankshaft (45) by screws, and the oil and gas passage seat (44) is provided with relatively independent oil passages M and gas passages N, the oil passages M are multiple, one end of each of the oil passages M is connected with the oil supply joint (41) in communication, the other end is connected with the oil hole (17) of the crankshaft (45) in communication, one end of the gas passage N is connected with the gas supply joint (3) in communication, and the other end is connected with the air inlet hole of the clutch brake unit (80) in communication, the upper end of the oil supply joint (41) is connected with the lubricating oil supply pipe (30), and the inner hole of the lubricating oil supply pipe is provided with a ring-shaped oil groove, so that the lubricating oil is uniformly introduced into the oil passage M.
[0009] Preferably, the ring-shaped oil grooves on both sides of the oil supply joint (41) are respectively provided with sealing rings (42a, 42b).
[0010] Preferably, the lower end of the oil supply joint (41) is provided with an oil pipe mounting hole and is connected with the overflow oil return pipe (40), so as to guide the overflow oil back into the machine body (13).
[0011] A crankshaft copper bush core oil supply lubricating device of a press machine, comprising an oil and gas passage seat (54), an oil supply joint (51), a gas supply joint (3) and a clutch brake unit (80), the clutch brake unit (80) has two groups in common; The oil and gas passage seat (54) is fixedly connected with the crankshaft (55) and rotates with the crankshaft (55); The oil and gas passage seat (54) is provided with at least one independent oil passage M and at least one independent gas passage N; One end of the oil passage M is connected with the internal oil passage of the oil supply joint (51) in communication, and the other end is connected with the oil hole (17) of the crankshaft (55) in communication; One end of the gas passage N is connected with the gas supply joint (3) in communication, and the other end is provided with at least one divergent hole for being connected with the air inlet hole of the clutch brake unit (80); The oil supply joint (51) is mounted on the oil and gas passage seat (54) through at least one bearing (50a, 50b), so that the oil supply joint (51) remains stationary relative to the rotating oil and gas passage seat (54).
[0012] Preferably, the oil supply joint (51) is provided with a ring-shaped oil groove in the inside, the ring-shaped oil groove corresponds to the oil passage M inlet position of the oil and gas passage seat (54), and is used for uniformly introducing the lubricating oil into the oil passage M.
[0013] Preferably, the oil supply joint (51) is further provided with an oil return passage and an oil return pipe mounting hole, the oil return passage is used for collecting the leaked lubricating oil at the sealing rings (52a, 52b), and the lubricating oil is guided back into the machine body (13) through the overflow oil return pipe (40).
[0014] Preferably, the upper end and the lower end of the oil supply joint (51) are respectively provided with oil pipe mounting holes, the oil pipe mounting hole of the upper end is used for connecting the lubricating oil supply pipe (30), and the oil pipe mounting hole of the lower end is used for connecting the overflow oil return pipe (40).
[0015] The beneficial effects of the present application are: the independent oil passage and gas passage are integrated in an oil-gas passage seat, and the seat is fixed with the crankshaft, which greatly simplifies the external pipeline layout, saves the internal space of the equipment, and makes the structure more compact and neat; the oil supply joint is installed on the rotating oil-gas passage seat through the rolling bearing, so that the externally connected lubricating oil supply pipe and the overflow return pipe do not need to rotate with the crankshaft, which fundamentally avoids the fatigue and fracture caused by the twisting and winding of the pipeline, and improves the long-term operation reliability of the system; double sealing rings are arranged at the key oil passage interfaces of the oil supply joint, and a special oil return passage and oil return pipe are designed outside the double sealing rings; the annular oil groove design in the oil supply joint ensures that the lubricating oil from the lubricating oil supply pipe can be evenly distributed in the circumferential direction and smoothly enter each oil passage of the oil-gas passage seat, and then be accurately delivered to each key friction pair such as the support copper shoe and the connecting rod copper shoe through the oil holes (shaft core oil hole and divergent oil hole) in the crankshaft, thereby ensuring the sufficiency and uniformity of lubrication. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 is a structural schematic diagram of the present application.
[0017] In the figure, 1 is a clutch brake unit, 2 is a gas passage seat, 3 is a gas supply joint, 13 is a machine body, 14 is a connecting rod, 16 is a machine body end detection oil hole, 17 is a crankshaft core oil hole, 18 is a crankshaft divergent oil hole, crankshaft support copper shoes 20a, 20b, 20c, crankshaft connecting rod copper shoes 21a, 22b, 30 is a lubricating oil supply pipe, 31 is an oil supply joint, rolling bearings 32a, 32b, 33 is an oil passage seat, sealing rings 34a, 34b, 35 is a crankshaft, 90 is a pressure detection switch.
[0018] Figure 2 is another structural schematic diagram of the present application.
[0019] In the figure, 3 is a gas supply joint, 13 is a machine body, 14 is a connecting rod, 16 is a machine body end detection oil hole, 17 is a crankshaft core oil hole, 18 is a crankshaft divergent oil hole; crankshaft support copper shoes 20a, 20b, 20c, crankshaft connecting rod copper shoes 21a, 22b, 30 is a lubricating oil supply pipe, 41 is an oil supply joint, sealing rings 42a, 42b, 43 is an oil seal seat, 44 is an oil-gas passage seat, 45 is a crankshaft, 80 is a clutch brake unit, 90 is a pressure detection switch.
[0020] Figure 3 is another structural schematic diagram of the present application.
[0021] Fig. 3 is a gas supply joint, 13 is a machine body, 14 is a connecting rod, 16 is a machine body end detection oil hole, 17 is a crankshaft core oil hole, 18 is a crankshaft dispersion oil hole; crankshaft support bronze bushings 20a, 20b, 20c, crankshaft connecting rod bronze bushings 21a, 22b, 30 is a lubricating oil supply pipe, 40 is an overflow oil return pipe, rolling bearings 50a, 50b, 51 is an oil supply joint, sealing rings 52a, 52b, 53 is a bearing stop, 54 is an oil gas passage seat, 55 is a crankshaft, 80 is a clutch brake unit, 90 is a pressure detection switch.
[0022] Figure 4 is Figure 1 Structure diagram in E-E direction.
[0023] Fig. 17 is a crankshaft core oil hole, 18 is a crankshaft dispersion oil hole.
[0024] Figure 5 is Figure 1 Structure diagram in F-F direction.
[0025] Fig. 17 is a crankshaft core oil hole, 18 is a crankshaft dispersion oil hole.
[0026] Figure 6 is Figure 5 Enlarged view in II.
[0027] Fig. 19 is a dispersion oil hole restrictor, 191 is a needle-shaped oil hole.
[0028] Figure 7 is Figure 1 Enlarged view in III.
[0029] Figure 8 Structure diagram of prior art.
[0030] Fig. 1 is a clutch brake unit, 2 is a gas passage seat, 3 is a gas supply joint, crankshaft support bronze bushings 4a, 4b, 4c, crankshaft connecting rod bronze bushings 5a, 5b, 6 is a connecting rod, 7 is a machine body, machine body oil supply holes 8a, 8b, 8c, connecting rod oil supply holes 9a, 9b, 15 is a crankshaft.
[0031] Figure 9 Structure diagram of prior art oil supply.
[0032] Fig. 5 is a crankshaft connecting rod bronze bushing, 6 is a connecting rod, 9 is a connecting rod oil supply hole, 10 is a lubricating oil supply pipe.
[0033] Figure 10 is Figure 8 Enlarged view in I.
[0034] Fig. 11 is a bronze bushing outer circle oil groove, 12 is a bronze bushing body oil hole.
[0035] Figure 11 This is a schematic diagram of the internal oil groove structure in the prior art.
[0036] In the figure, 71 is the axial oil groove of the inner hole, and 72 is the annular oil groove of the inner hole. Detailed Implementation Example
[0037] like Figure 1 As shown, a separate oil and gas supply single-medium channel seat is adopted (oil supply single-medium channel seat on the left and gas supply single-medium channel seat on the right).
[0038] A shaft core oil supply and lubrication device for a press crankshaft copper bearing, the device comprising a clutch and brake unit 1, an air supply channel seat 2, an air supply connector 3, an oil supply connector 31, an oil supply channel seat 33, and a crankshaft 35; the clutch and brake unit 1 is only one set. On the right side of crankshaft 35 are air passage seat 2 and air supply connector 3 for supplying air to clutch brake 1. On the left side of crankshaft 35, oil passage seat 33 is threaded onto crankshaft, and oil supply connector 31 is installed with oil passage seat 33 via two rolling bearings 32a and 32b. Oil passage seat 33 has evenly distributed oil inlet holes on its outer circumference and oil passage M on its shaft core. Oil supply connector 31 has an oil pipe mounting hole on its exterior, connecting to a lubrication oil supply pipe 30. Due to the action of rolling bearings 32a and 32b, oil supply connector 31 remains stationary while oil passage seat 33 rotates with crankshaft, preventing oil pipe 30 from malfunctioning due to movement, unlike oil pipe 10. The inner hole of oil supply connector 31 has a ring-shaped oil groove to allow lubricating oil to evenly enter the oil passage M of oil passage seat 33. Oil passage M is connected to the oil hole 17 on the shaft core of crankshaft 35. The inner hole of the oil supply connector 31 has sealing rings 34a and 34b on both sides of the ring-shaped oil groove to prevent lubricating oil leakage and pollution of the production environment. Example
[0039] like Figure 2 As shown, a combined oil and gas supply dual-medium channel seat type A is adopted (both the left and right sides are oil and gas supply dual-medium channel seats).
[0040] A kind of oil supply lubricating device of press crankshaft copper shoe axle core, oil-gas passage seat 44 is fixed on crankshaft 45 by screw, oil-gas passage seat 44 has relatively independent oil passage M and gas passage N.Oil passage M has multiple, and each one head is communicated with oil supply connector 41, and one head is communicated with the oil hole 17 of the axle core of crankshaft 45;Gas passage N one head is communicated with gas supply connector 3, and the divergent hole of one head is communicated with the air inlet hole of clutch brake unit 80.Supply oil connector 41 has oil pipe mounting hole on the outer upper end and is connected with lubricating oil supply pipe 30, and there is annular oil groove on the inner hole, which can make lubricating oil evenly enter the oil passage M of oil-gas passage seat 44.The two sides of the annular oil groove of supply oil connector 41 are respectively provided with sealing ring 42a and 42b, to prevent lubricating oil from leaking and polluting the production environment.Sealing ring 42a and 42b are respectively installed on oil seal seat 43 and oil-gas passage seat 44, and the matching surfaces are specially treated.The inner hole of supply oil connector 41 and the outer circle of oil-gas passage seat 44 are precisely small gap matched, and the gap needs to be calculated by adjusting the length of the matching surface of the two, calculating the lubricating oil entering oil pressure, and calculating the allowable lubricating oil loss oil pressure.When the gap is appropriate, when lubricating oil enters through supply oil connector 41, a layer of ultra-thin rigid oil film will be formed between the inner hole of supply oil connector 41 and the outer circle of oil-gas passage seat 44, and supply oil connector 41 will be suspended on the rigid oil film and will not produce relative rotational motion with oil-gas passage seat 44 when oil-gas passage seat 44 rotates. At the same time, since an ultra-thin rigid oil film needs to be formed, the surface roughness of the inner hole of supply oil connector 41 and the outer circle of oil-gas passage seat 44 is very high. This oil supply structure needs to have a certain overflow when calculating the allowable lubricating oil loss oil pressure, so there is an oil pipe mounting hole on the lower end of the outer part of supply oil connector 41 and is connected with overflow oil return pipe 40, and the overflow oil returns to the machine body 13 through the return pipe 40. Embodiment
[0041] As Figure 3 shown, a combined oil and gas supply dual medium passage seat B type (both left and right sides are oil and gas supply dual medium passage seats) is adopted.
[0042] A kind of oil supply lubricating device of press machine crankshaft copper shoe core, oil gas passage seat 54 is fixed on crankshaft 55 by screw, oil gas passage seat 54 has relatively independent oil passage M and gas passage N.Oil passage M has multiple, and each one head is communicated with oil supply connector 51, and one head is communicated with the oil hole 17 of the core of crankshaft 55;Gas passage N one head is communicated with gas supply connector 3, and the divergent hole of one head is communicated with the air inlet hole of clutch brake unit 80.The outer upper end of oil supply connector 51 has oil pipe mounting hole and is connected with lubricating oil supply pipe 30, and the inner hole has annular oil groove, so that lubricating oil can enter into the oil passage M of oil gas passage seat 54 uniformly.The two sides of the annular oil groove of oil supply connector 51 are provided with sealing ring 52a, 52b respectively, to prevent lubricating oil from leaking and polluting the production environment.The outer lower end of oil supply connector 51 has oil pipe mounting hole and is connected with overflow oil return pipe 40, and the lubricating oil leaked by the sealing ring returns to the machine body 13 through the return pipe 40.Oil supply connector 51 is installed with oil gas passage seat 54 through two rolling bearings 50a, 50b, and due to the action of rolling bearings 50a, 52b, oil gas passage seat 54 is static when following the rotation of crankshaft, and oil pipe 30 and return pipe 40 will not fail due to movement like oil pipe 10.
[0043] Compared with example 2, due to the action of rolling bearings 50a, 52b, the matching requirement of oil supply connector 51 and oil gas passage seat 54 is reduced, and there is no need to calculate the precise small gap like the inner hole of oil supply connector 41 and the outer circle of oil gas passage seat 44, only a conventional large matching gap is needed.But due to the increase of matching gap, lubricating oil will continuously extrude sealing ring 52a, 52b through the matching gap, and the sealing ring needs to have higher performance, and its pressure resistance and linear speed performance need to be greatly improved.
[0044] As shown in Figure 7 The crankshaft support copper shoe 20a, 20b, 20c and crankshaft connecting rod copper shoe 21a, 21b of the present application have no outer circle annular oil groove, so that the wall thickness of the copper shoe is reduced under the premise of ensuring the strength of the copper shoe, and the manufacturing cost is reduced.At the same time, there is no need to increase oil hole on the connecting rod and connect the moving oil pipe, and the oil pipe failure is avoided.
[0045] As shown in Figure 4 , Figure 5 The core of crankshaft 35, 45, 55 has oil hole 17, and the matching surface of each friction pair has divergent oil hole 18, and the divergent oil hole 18 can have 4 or more according to the size of crankshaft diameter.Lubricating oil enters into the oil hole 17 through the oil passage M of oil passage seat 33, and finally is shunted to each friction pair through the divergent oil hole 18.
[0046] As shown in Figure 6As shown, the inside of the divergent oil hole 18 is provided with a restrictor 19, and the shaft core of the restrictor 19 has a needle-shaped oil hole 191. The lubricating oil entering the divergent oil hole 18 can press the lubricating oil to increase the oil pressure and form a high-pressure oil jet into the gap of the friction pair at the outlet when passing through the needle-shaped oil hole due to the principle of fluid damping; at the same time, the needle-shaped oil hole can constrain and possibly uniformly arrange the oil flow size of each lubrication point, preventing excessive flow at a certain lubrication point from reducing the flow at other lubrication points. In addition, without the restrictor 19, the lubricating oil pressure at the end of the shaft core oil hole 17 is generally smaller than the oil pressure at the inlet, which may lead to insufficient lubrication and damage to the friction pair. When the lubricating oil is constrained by the needle-shaped oil hole 191 of each restrictor, the oil pressure at the end of the shaft core oil hole 17 can be equivalent to the oil pressure at the inlet, so that each part of the crankshaft can be fully lubricated.
[0047] The three embodiments of the shaft core oil supply lubrication of the copper bush of the press crankshaft of the present application are provided with an end detection oil hole 16 at the farthest end of the lubrication system on the machine body, and a pressure detection switch 90 is installed. Since the lubricating oil pressure at the end of the lubrication system is generally the lowest value in the entire system, by setting a minimum required oil pressure value on the pressure detection switch 90, when the pressure detection switch detects that the oil pressure at the end of the lubrication system is lower than the set value, the press alarm system is triggered, reminding the operator to check and maintain the press, avoiding damage to the press caused by failure of the lubrication system in advance, and greatly improving the reliability of the press in working state.
[0048] The three embodiments of the shaft core oil supply lubrication of the copper bush of the press crankshaft of the present application are provided with an end detection oil hole 16 at the farthest end of the lubrication system on the machine body, and a pressure detection switch 90 is installed. Since the lubricating oil pressure at the end of the lubrication system is generally the lowest value in the entire system, by setting a minimum required oil pressure value on the pressure detection switch 90, when the pressure detection switch detects that the oil pressure at the end of the lubrication system is lower than the set value, the press alarm system is triggered, reminding the operator to check and maintain the press, avoiding damage to the press caused by failure of the lubrication system in advance, and greatly improving the reliability of the press in working state.
[0049] Although embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.
Claims
1. A shaft core oil supply and lubrication device for a press crankshaft copper bearing, characterized in that: The device includes a clutch and brake unit (1), an air supply channel seat (2), an air supply connector (3), an oil supply connector (31), an oil supply channel seat (33), and a crankshaft (35); there is only one clutch and brake unit (1); The air supply channel seat (2) is located on the right side of the crankshaft (35) and is used to supply air to the clutch braking unit (1). The air supply connector (3) is connected to the air supply channel seat (2). The oil supply channel seat (33) is installed on the left side of the crankshaft (35) by thread. The oil supply connector (31) is connected to the oil supply channel seat (33) by rolling bearings (32a, 32b). The lubrication oil supply pipe (30) is connected to the oil supply connector (31). The inner hole of the oil supply connector (31) is provided with a ring-shaped oil groove. The ring-shaped oil groove is provided with sealing rings (34a, 34b). The oil supply channel seat (33) is provided with an oil channel M. The oil channel M is connected to the ring-shaped oil groove and is connected to the internal oil circuit of the crankshaft (35) through the shaft core oil hole (17). The outer circle of the oil supply channel seat (33) is evenly distributed with several oil inlet holes. The lubrication oil supply pipe (30) is stationary.
2. A shaft core oil supply and lubrication device for a press crankshaft copper bearing, characterized in that: The device includes an air supply connector (3), a machine body (13), a shaft core oil hole (17), a lubrication oil supply pipe (30), an oil supply connector (41), an oil and gas passage seat (44), a crankshaft (45), a pressure detection switch (90), and a clutch and brake unit (80); there are two sets of the clutch and brake unit (80). The oil-gas passage seat (44) is fixed to the crankshaft (45) by screws. The oil-gas passage seat (44) is provided with relatively independent oil passage M and gas passage N. There are multiple oil passages M. One end of each passage is connected to the oil supply connector (41), and the other end is connected to the shaft core oil hole (17) of the crankshaft (45). One end of the gas passage N is connected to the air supply connector (3), and the other end is connected to the air inlet of the clutch brake unit (80). The upper end of the oil supply connector (41) is connected to the lubrication oil supply pipe (30). The inner hole of the lubrication oil supply pipe is provided with a ring-shaped oil groove so that the lubricating oil enters the oil passage M evenly.
3. The shaft core oil supply and lubrication device for the copper bearing of a press crankshaft according to claim 2, characterized in that: Sealing rings (42a, 42b) are respectively provided on both sides of the ring-shaped oil groove of the oil supply connector (41).
4. The shaft core oil supply and lubrication device for a press crankshaft copper bearing according to claim 2, characterized in that: The lower end of the oil supply connector (41) is provided with an oil pipe installation hole and connected to the overflow oil return pipe (40) to guide the overflow oil back into the machine body (13).
5. A shaft core oil supply and lubrication device for a press crankshaft copper bearing, characterized in that: It includes an oil and gas passage seat (54), an oil supply connector (51), an air supply connector (3), and a clutch and brake unit (80); the clutch and brake unit (80) consists of two sets; The oil and gas passage seat (54) is fixedly connected to the crankshaft (55) and rotates with it; The oil and gas passage seat (54) is provided with at least one independent oil passage M and at least one independent gas passage N; One end of the oil passage M is connected to the internal oil passage of the oil supply connector (51), and the other end is connected to the shaft core oil hole (17) of the crankshaft (55). One end of the air passage N is connected to the air supply connector (3), and the other end is provided with at least one diverging hole for connecting to the air inlet of the clutch braking unit (80). The oil supply connector (51) is mounted on the oil and gas passage seat (54) by at least one bearing (50a, 50b), so that the oil supply connector (51) remains stationary relative to the rotating oil and gas passage seat (54).
6. The shaft core oil supply and lubrication device for a press crankshaft copper bearing according to claim 5, characterized in that: The oil supply connector (51) has an annular oil groove inside, which corresponds to the oil channel M inlet position of the oil-gas channel seat (54) and is used to uniformly introduce lubricating oil into the oil channel M.
7. The shaft core oil supply and lubrication device for a press crankshaft copper bearing according to claim 6, characterized in that: The oil supply connector (51) is also provided with an oil return channel and an oil return pipe installation hole. The oil return channel is used to collect the lubricating oil leaking from the sealing rings (52a, 52b) and guide it back into the machine body (13) through the overflow oil return pipe (40).
8. The oil supply and lubrication device for the crankshaft copper bearing of a press according to claim 7, characterized in that: The oil supply connector (51) is provided with oil pipe mounting holes at its upper and lower ends respectively. The oil pipe mounting hole at the upper end is used to connect the lubrication oil supply pipe (30), and the oil pipe mounting hole at the lower end is used to connect the overflow oil return pipe (40).