Centralized oil passage double-line pump oil device

Abstract

The application discloses a centralized oil path double-line pump oil device, and an oil path reversing device has an eccentric wheel, the eccentric wheel drives a plurality of pump units which are in contact with the eccentric wheel at the same time, the eccentric wheel generates a variable eccentricity to drive the pump units to suck and discharge oil from an oil tank, and a plurality of oil discharge channels are formed, the plurality of oil discharge channels are communicated and gathered into the same centralized oil path channel, and the centralized oil path channel is communicated with a reversing valve block; a connecting rod type clutch is arranged on the reversing valve block, and the connecting rod type clutch drives a reversing valve core to reverse the oil path of the reversing valve. The patent saves space and solves the problem of high failure rate of the soft connection clutch of other similar products.

Description

TECHNICAL FIELD

[0001] The present application relates to a pump oil device, in particular to a centralized oil path double-line pump oil device. BACKGROUND

[0002] At present, the electromagnetic reversing valve is used in the double-line dry oil lubrication pump to realize the reversing of the oil path of the double-line lubrication system. The electromagnetic reversing valve used in the dry oil lubrication field has high failure rate. The double-line dry oil lubrication pump adopts the design that the oil is sucked into the oil tank through a single pump unit, and then passes through the main oil inlet of the electromagnetic reversing valve. This design limits the displacement of the double-line dry oil lubrication pump. In order to meet the use requirements of large displacement of users, multiple pump units are connected in parallel in the traditional pump body, which requires a large number of external pipelines to be connected, and a large amount of space is wasted. SUMMARY

[0003] In order to solve the above technical problems, the present application provides a centralized oil path double-line pump oil device.

[0004] In order to solve the above technical problems, the present application adopts the technical scheme of a mechanical lever type oil path reversing device. The oil path reversing device has an eccentric wheel. The eccentric wheel drives multiple pump units which are in contact with the eccentric wheel. The eccentric wheel drives the pump units to suck and discharge oil from the oil tank by changing the eccentric distance, and forms multiple oil discharge channels. The multiple oil discharge channels are connected and collected into the same centralized oil path channel. The centralized oil path channel is connected with a reversing valve block. A connecting rod type clutch is arranged on the reversing valve block. The connecting rod type clutch drives the reversing valve core to reverse the oil path of the reversing valve.

[0005] Further, the oil path reversing device further comprises a motor. The eccentric wheel is connected to the main shaft of the motor. The connecting rod type clutch is driven by the lever connected to the main shaft of the motor.

[0006] Further, the pump unit comprises a pump body. An oil suction chamber and an oil discharge chamber are formed in the pump body. The oil suction chamber and the oil discharge chamber are connected and closed by a one-way valve. The one-way valve has a piston and a fixed seat with an oil discharge hole. The fixed seat is fixedly arranged in the oil discharge chamber. The piston and the fixed seat are elastically connected by a second spring. A pin shaft is connected to the piston and located in the second spring. A plunger is movably arranged in the oil suction chamber. One end of the plunger extends out of the oil suction chamber and is in contact with the circumferential side wall of the eccentric wheel through a contact portion.

[0007] Further, the connecting rod type clutch comprises a first rotating shaft and a second rotating shaft. The first rotating shaft and the second rotating shaft are arranged on the reversing valve block. A first connecting rod is connected to the first rotating shaft. The first connecting rod rotates horizontally around the first rotating shaft as the center. A second connecting rod is connected to the second rotating shaft. The second connecting rod rotates horizontally around the second rotating shaft as the center.

[0008] Further, the first connecting rod has a first contact arm and a second contact arm, the first contact arm and the second contact arm are symmetrically arranged left and right, and a swing space is formed between the first contact arm and the second contact arm, the swing space includes a rotating area for the rotation of the second rotating shaft and a swing area for the swing of the second connecting rod.

[0009] Further, the rotating area is circular, and the swing area is a sector with an outwardly increasing opening.

[0010] Further, a long slot hole is formed in the second connecting rod in the horizontal direction, a spring shaft with a circular cross section is transversely arranged in the long slot hole, a vertical cylindrical pin is connected to the spring shaft, the cylindrical pin passes through the pin hole above the long slot hole, and the spring shaft swings around the cylindrical pin as the center.

[0011] Further, the two ends of the spring shaft respectively pass through the first contact arm and the second contact arm and respectively extend outward, a spring is sleeved on the shaft body of the first contact arm and the second contact arm where the spring shaft passes out, and each spring is clamped on one side of the first contact arm or the second contact arm through a stop sheet located on the end of the corresponding spring shaft.

[0012] Further, one side end of the spring shaft is connected to a reversing valve core in the limiting groove, and the reversing valve core is driven to act.

[0013] Further, the oil discharge chamber is downwardly communicated with a plurality of oil discharge channels, the plurality of oil discharge channels are commonly communicated on an annular channel and are collected into the same concentrated oil passage, and the concentrated oil passage is communicated with the main oil inlet.

[0014] The application discloses a concentrated oil passage double-line pump oil device, adopts a concentrated pumping oil passage design, and can use multiple pump units in parallel through the concentrated oil passage, and the design saves space. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the connecting rod clutch of the application.

[0016] Figure 2 It is a three-dimensional schematic diagram of the connecting rod clutch of the application.

[0017] Figure 3 It is a schematic diagram of the connecting rod clutch of the application. Figure 2 It is an enlarged schematic diagram of the middle part of the middle ring.

[0018] Figure 4 It is a schematic diagram when the motor rotates forward.

[0019] Figure 5 It is a conduction schematic diagram of the reversing valve core when the motor rotates forward.

[0020] Figure 6 Fig. 5 is a schematic diagram of the valve core when the motor is reversed.

[0021] Figure 7 Fig. 6 is a schematic diagram of the valve core when the motor is reversed.

[0022] Figure 8 Fig. 7 is a schematic diagram of the pumping of the centralized oil path double-line pumping device.

[0023] Figure 9 Fig. 8 is a schematic diagram of the oil delivery of the centralized oil path double-line pumping device.

[0024] Figure 10 Fig. 9 is a schematic diagram of the oil delivery of the centralized oil path double-line pumping device.

[0025] Figure 11 Fig. 10 is a schematic diagram of the pumping of the pump unit.

[0026] Figure 12 Fig. 11 is a schematic diagram of the pumping of the pump unit.

[0027] Figure 13 Fig. 12 is a schematic diagram of the installation position of the oil tank of the centralized oil path double-line pumping device.

[0028] In the figure: 1, reversing valve block; 2, reversing valve core; 3, limiting groove; 4, connecting rod clutch; 5, swing space; 6, motor; 7, lever; 8, eccentric wheel; 9, pump unit; 10, discharge oil channel; 11, annular channel; 12, centralized oil path channel; 13, oil tank; 14, main oil inlet channel;

[0029] 41, first rotating shaft; 42, second rotating shaft; 43, first connecting rod; 44, second connecting rod; 45, spring shaft; 46, cylindrical pin; 47, baffle; 48, spring;

[0030] 51, rotating area; 52, swing area;

[0031] 91, pump body; 92, oil suction chamber; 93, oil discharge chamber; 94, one-way valve;

[0032] 431, first contact arm; 432, second contact arm;

[0033] 441, long slot hole; 442, pin hole;

[0034] 941, piston; 942, fixed seat; 943, second spring; 944, pin shaft. DETAILED DESCRIPTION

[0035] The application discloses a centralized oil path double-line pumping device, which adopts an eccentric wheel to drive a plurality of pumping units simultaneously contacting the eccentric wheel, utilizes the eccentricity change of the eccentric wheel to drive the pumping units to suck and discharge oil from an oil tank, and forms a plurality of oil discharge channels.

[0036] Specifically, as shown in the figure, a motor 6 is vertically arranged at the center of the device, an eccentric wheel 8 is connected to the main shaft of the motor 6, two pumping units 9 for sucking oil from the oil tank are connected to the circumferential side wall of the eccentric wheel 8 in contact, and the motor 6 drives the eccentric wheel 8 to generate eccentricity when started, and the pumping units 9 are driven simultaneously by the eccentricity. Figure 8

[0037] As shown in the figure, the pumping unit 9 comprises a pump body 91, an oil suction chamber 92 and an oil discharge chamber 93 are arranged in the pump body 91, and the oil suction chamber 92 and the oil discharge chamber 93 are controlled to be open and closed by a one-way valve 94. Figure 11

[0038] As shown in the figure, the one-way valve has a piston 941 and a fixed seat 942 provided with an oil discharge hole, the fixed seat 942 is fixedly arranged in the oil discharge chamber 93, the piston 941 and the fixed seat 942 are elastically connected by a second spring 943, a pin shaft 944 is connected to the piston 941, and the pin shaft 944 is located in the second spring 943. Figure 12

[0039] As shown in the figure, the oil suction chamber 92 movably arranged has a plunger 921, one end of the plunger 921 extends out of the oil suction chamber 92 and is in contact with the circumferential side wall of the eccentric wheel 8 through a contact part 922, the contact part 922 is usually made of rigid material, and the surface in contact with the eccentric wheel 8 has high smoothness. A first spring 923 is connected to the contact part 922, the first spring 923 is simultaneously sleeved on the plunger 921 and the pump body 91, the end of the first spring 923 is connected to the pump body 91, the pump body 91 is fixed in the centralized oil path double-line pumping device, and therefore, the contact part 922 is always in contact with the circumferential side wall of the eccentric wheel 8 by the elastic force of the first spring 923 when the eccentric wheel 8 rotates, and the plunger 921 also moves back and forth with the change of the eccentricity of the eccentric wheel 8 in the process, when the eccentricity of the eccentric wheel 8 is the smallest and acts on the plunger 921, the plunger 921 is moved to the position closest to the main shaft of the motor 6 under the elastic force of the first spring 923, the plunger 921 moves to release the oil storage space in the oil suction chamber 92 for oil suction, and at least one oil suction port 924 corresponding to the oil storage space is arranged on the pump body 91. Figure 11 Figure 13 ​​​​As shown, during use, the oil tank 13 is positioned above the centralized oil circuit dual-line pump device to provide the grease to be drawn in; when drawing in oil, the one-way valve 94 of the oil discharge chamber 93 is closed, thus freeing up the oil storage space to generate negative pressure for oil drawing.

[0040] like Figure 12 As shown, when the eccentricity of the eccentric wheel 8 gradually increases and acts on the plunger 921, the plunger 921 moves to a position close to the oil discharge chamber 93. The plunger 921 gradually increases the compression force on the grease in the oil storage space. When the compression force is greater than the elastic force of the second spring 943, the compression force drives the piston 941 to compress the second spring 943 at the same time. At this time, the one-way valve 94 opens the oil suction chamber 92 and the oil discharge chamber 93. The pin 944 moves towards the fixed seat 942 and passes through the oil discharge hole. The outer diameter of the pin 944 is smaller than the inner diameter of the oil discharge hole of the fixed seat 942. The grease will enter the oil discharge chamber 93 through the gap between the oil discharge hole and the pin 944.

[0041] like Figure 8 Each of the oil discharge chambers 93 shown is connected downwards to an oil discharge channel 10, such as... Figure 10 The four grease discharge channels 10 shown are connected to a ring channel 11 and converge into the same centralized oil passage channel 12, as follows. Figure 9 The centralized oil passage 12 shown is connected to the main oil inlet passage 14.

[0042] Meanwhile, this invention utilizes the reversing action of a connecting rod clutch to drive the reversing valve core located within the reversing valve block to perform oil circuit reversing of the reversing valve. The reversing valve used in this patent is a two-position four-way valve, which has a main oil inlet P, an oil outlet A, an oil outlet B, and an oil discharge port T.

[0043] like Figure 1 The schematic diagram shows that the aforementioned linkage clutch uses the forward and reverse rotation of the motor M to control the action, thereby driving the reversing valve core. The system is set with a fixed reversing value. When the main oil inlet P is connected to the oil outlet A, and the system pressure at the oil outlet A reaches the set reversing value, the main oil inlet P is disconnected from the oil outlet A. The motor rotates forward and drives the linkage clutch through the lever to drive the reversing valve core, causing the oil outlet A to be depressurized and the unloading port T to be depressurized. At this time, the main oil inlet P is connected to the oil outlet B. When the system pressure at the oil outlet B reaches the set reversing value, the oil inlet P is disconnected from the oil outlet B. The motor rotates in reverse and drives the linkage clutch through the lever to drive the reversing valve core, causing the oil outlet B to be depressurized and the unloading port T to be depressurized. The oil inlet P is connected to port A. The oil outlet A and the oil outlet B alternate in a cycle through the reversing valve core.

[0044] Specifically, such as Figure 2The mechanical lever oil path reversing device shown includes a reversing valve block 1, a two-position four-way valve formed in the reversing valve block 1, the reversing valve core 2 located in the limiting groove 3 of the reversing valve block 1, and the lever clutch 4 located on the reversing valve block 1, and the lever clutch 4 is actuated to drive the reversing valve core 2 in the limiting groove 3.

[0045] The lever clutch 4 includes a first rotating shaft 41 and a second rotating shaft 42 as shown. Figure 3 The first rotating shaft 41 and the second rotating shaft 42 are both provided on the reversing valve block 1, the first rotating shaft 41 is connected with the first lever 43, the first lever 43 rotates horizontally with the first rotating shaft 41 as the center, the second rotating shaft 42 is connected with the second lever 44, and the second lever 44 rotates horizontally with the second rotating shaft 42 as the center.

[0046] The first lever 43 has a first contact arm 431 and a second contact arm 432, which are symmetrically arranged left and right, and a swing space 5 is formed between the first contact arm 431 and the second contact arm 432, the swing space 5 includes a rotating area 51 for the rotation of the second rotating shaft 42 and a swing area 52 for the swing of the second lever 44, and the rotating space is preferably circular, and the swing space is a sector with the opening gradually increasing outward. The second rotating shaft 42 rotates in the rotating area 51, the second lever 44 swings in the space defined by the swing area 52, the second lever 44 passes through the swing area 52 and extends outwardly beyond the swing area 52.

[0047] A long slot hole 441 is formed horizontally on the second lever 44, a spring shaft 45 with a circular cross section is transversely arranged in the long slot hole 441, a vertical cylindrical pin 46 is connected to the spring shaft 45, the cylindrical pin 46 passes through a pin hole 442 above the long slot hole 441, and the spring shaft 45 swings around the cylindrical pin 46 as the center, and the width of the long slot hole 441 limits the swing of the spring shaft 45.

[0048] The two ends of the spring shaft 45 respectively pass through the first contact arm 431 and the second contact arm 432 and respectively extend outwardly, a spring 48 is sleeved on the shaft body of the first contact arm 431 and the second contact arm 432 where the spring shaft 45 passes through, and each spring 48 is clamped on one side of the first contact arm 431 or the second contact arm 432 by a stop piece 47 located on the end of the corresponding spring shaft 45.

[0049] One end of the spring shaft 45 is connected to the reversing valve core 2 in the limiting groove 3 to drive the reversing valve core to act.

[0050] As shown in the figure, Figure 4 The mechanical lever oil path reversing device drives the second lever 44 by the forward and reverse rotation of the motor 6.

[0051] As shown in the figure, Figure 4 andFigure 5 As shown, when the motor 6 is rotating forward: the lever 7 contacts the second connecting rod 44, the second connecting rod 44 swings under force, the spring shaft 45 on the second connecting rod 44 swings under force and performs circular motion in the long slot hole 441, when swinging, the reversing valve core 2 connected to the end of the spring shaft 45 performs linear motion along the limiting groove 3 along the arrow, realizing the conversion of the circular motion of the second connecting rod into the linear motion of the spring shaft, when the spring shaft moves, the spring on one side of the first contact arm is compressed, when the second connecting rod contacts the first contact arm, the second connecting rod and the first contact arm are hard connected at this time, the second connecting rod 44 drives the first contact arm 431, at this time, the oil supply state is that the oil outlet A is communicated with the oil discharge port T to discharge pressure, and the main oil inlet P is communicated with the oil outlet B.

[0052] When the motor 6 is reversed: the second connecting rod 44 is in the state as shown in Figure 6 As described above, to Figure 7 As shown, at this time, the oil supply state is that the oil outlet B is communicated with the oil discharge port T to discharge pressure, and the main oil inlet P is communicated with the oil outlet A, then the lever 7 is out of contact with the second connecting rod 44, the spring on one side of the first contact arm 431 rebounds, the second connecting rod 44 recovers under the force of spring rebound, the motor can be rotated to the second connecting rod 44 when rotating forward, realizing forward conversion.

[0053] The application discloses a centralized oil path double-line pump oil device, adopts centralized pumping oil path design, and can use multiple pump units in parallel through the centralized oil path, and the design saves space. The built-in reversing valve is integrated with a reversing valve connecting rod type clutch, and a spring type soft connection hard connection structure is used to solve the problem of high failure rate of soft connection clutches of other similar products.

[0054] The above-mentioned embodiments are not a limitation of the present application, and the present application is not limited to the above examples, and the changes, modifications, additions or replacements made by the person skilled in the art within the technical solution range of the present application also belong to the protection range of the present application.

Claims

1. A centralized oil circuit dual-line pumping device, characterized in that: The centralized oil circuit dual-line pump device has an eccentric wheel, which drives multiple pump units that are simultaneously in contact with the eccentric wheel. The eccentric wheel generates a changing eccentricity, which drives the pump units to draw in and discharge grease from the oil tank, forming multiple grease discharge channels. These multiple grease discharge channels are connected and converge into the same centralized oil circuit channel, which is connected to a reversing valve block. The reversing valve block is equipped with a connecting rod clutch, which actuates the reversing valve core to reverse the oil circuit of the reversing valve. The linkage clutch (4) includes a first rotating shaft (41) and a second rotating shaft (42). Both the first rotating shaft (41) and the second rotating shaft (42) are mounted on the reversing valve block (1). A first connecting rod (43) is connected to the first rotating shaft (41). The first connecting rod (43) rotates horizontally around the first rotating shaft (41). A second connecting rod (44) is connected to the second rotating shaft (42). The second connecting rod (44) rotates horizontally around the second rotating shaft (42). The first connecting rod (43) has a first contact arm (431) and a second contact arm (432). The first contact arm (431) and the second contact arm (432) are arranged symmetrically on the left and right sides. A swing space (5) is formed between the first contact arm (431) and the second contact arm (432). The swing space (5) includes a rotation area (51) for the rotation of the second rotating shaft (42) and a swing area (52) for the swing of the second connecting rod (44). The second connecting rod (44) has a long slot (441) in the horizontal direction. A spring shaft (45) with a circular cross-section passes through the long slot (441). A vertical cylindrical pin (46) is connected to the spring shaft (45). The cylindrical pin (46) passes through the pin hole (442) above the long slot (441). The spring shaft (45) rotates around the cylindrical pin (46).

2. The centralized oil circuit dual-line pumping device according to claim 1, characterized in that: The centralized oil circuit dual-line pump device also includes a motor, the eccentric wheel is connected to the motor main shaft, and the connecting rod clutch is actuated by a lever connected to the motor main shaft.

3. The centralized oil circuit dual-line pumping device according to claim 1 or 2, characterized in that: The pump unit (9) includes a pump body (91), which has an oil suction chamber (92) and an oil discharge chamber (93). The oil suction chamber (92) and the oil discharge chamber (93) are connected and closed by a one-way valve (94). The one-way valve (94) has a piston (941) and a fixed seat (942) with an oil discharge hole. The fixed seat (942) is fixed in the oil discharge chamber (93). The piston (941) and the fixed seat (942) are elastically connected by a second spring (943). A pin (944) is connected to the piston (941) and the pin (944) is located in the second spring (943). A plunger (921) is movably installed in the oil suction chamber (92). One end of the plunger (921) extends out of the oil suction chamber (92) and contacts the circumferential side wall of the eccentric wheel (8) through a contact part (922).

4. The centralized oil circuit dual-line pumping device according to claim 3, characterized in that: The rotating area (51) is circular, and the swinging area (52) is a fan-shaped area with the opening gradually increasing outward.

5. The centralized oil circuit dual-line pumping device according to claim 4, characterized in that: The two ends of the spring shaft (45) pass through the first contact arm (431) and the second contact arm (432) respectively and extend outward. The spring shaft (45) is fitted with springs (48) outside the shaft of the first contact arm (431) and the second contact arm (432). Each spring (48) is locked on one side of the first contact arm (431) or the second contact arm (432) by a baffle (47) located on the end of the corresponding spring shaft (45).

6. The centralized oil circuit dual-line pumping device according to claim 5, characterized in that: One end of the spring shaft (45) is connected to the reversing valve core (2) in the limiting groove (3) to drive the reversing valve core to move.

7. The centralized oil circuit dual-line pumping device according to claim 3, characterized in that: The oil discharge chamber (93) is connected downward to the grease discharge channel (10). Multiple grease discharge channels (10) are connected to a ring channel (11) and converge into the same centralized oil passage channel (12). The centralized oil passage channel (12) is connected to the main oil inlet.

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