Double-piston oil supply device

Abstract

The utility model belongs to the technical field of butter machines, and particularly relates to a double-piston oil supply device which comprises an oil well pump body, a piston assembly and a power motor, an oil outlet channel is arranged in the oil well pump body, a left oil pushing rod and a right oil pushing rod are arranged in the oil outlet channel in a sliding mode, and the piston assembly comprises a left piston mechanism and a right piston mechanism. The left piston mechanism and the right piston mechanism are connected with the left oil pushing rod and the right oil pushing rod respectively, a motor shaft is arranged on the power motor, and a transmission device is arranged between the motor shaft and the left piston mechanism and between the motor shaft and the right piston mechanism and comprises a driving gear, a left driven gear and a right driven gear. The left driven gear and the right driven gear are provided with a left eccentric wheel and a right eccentric wheel respectively, the left eccentric wheel and the right eccentric wheel are connected with the left oil pushing rod and the right piston mechanism respectively, the oil supply device is simple in structure and provided with two sets of piston assemblies for oil supply, the oil outlet amount is large, the continuity is good, and a user can conveniently fill grease into mechanical equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of grease dispensers, in particular to a double-piston oil supply device. Background Art

[0002] When many parts of mechanical equipment or motor vehicles that run frequently or at high speeds run for a certain period of time, their moving parts generally need to be filled with butter or other grease for lubrication and maintenance to prevent high temperature and wear caused by friction between the two parts. Therefore, different types of electric grease machines are now available on the market, such as Chinese patent CN202223269438.9, an integrated electric grease machine, whose oil pump assembly has only one set. This type of machine adopts a single feeding method, and has the problems of small oil output and poor sustainability, which affects the user's normal grease filling of mechanical equipment and reduces the user's work efficiency. Summary of the Invention

[0003] The purpose of the utility model is to provide an oil supply device with a simple structure and two groups of piston assemblies for oil supply. The oil output is large and the continuity is good, which is beneficial for users to add butter to mechanical equipment and can improve the work efficiency of users.

[0004] The purpose of this utility model is achieved in this way:

[0005] The transmission gear is arranged on the motor shaft, and the driving gear is meshed with the left driven gear and the right driven gear. The left driven gear and the right driven gear are respectively provided with a left eccentric wheel and a right eccentric wheel, and the left eccentric wheel and the right eccentric wheel are respectively connected to the left oil push rod and the right piston mechanism.

[0006] Furthermore, the left piston mechanism includes a left connecting rod, the left eccentric wheel is provided with a left eccentric column, the left eccentric column is sleeved with a first bearing, the left connecting rod is provided with a left connecting portion, and the left connecting portion is sleeved on the first bearing; the left piston mechanism includes a right connecting rod, the right eccentric wheel is provided with a right eccentric column, the right eccentric column is sleeved with a second bearing, the right connecting rod is provided with a right connecting portion, and the right connecting portion is sleeved on the second bearing.

[0007] Furthermore, a left connecting hole is provided on the left eccentric column, a left limiting rod is provided in the left connecting hole, the top end of the left limiting rod is exposed outside the left connecting hole and abuts against the first bearing, and a right connecting hole is provided on the right eccentric column, a right limiting rod is provided in the right connecting hole, the top end of the right limiting rod is exposed outside the right connecting hole and abuts against the second bearing.

[0008] Furthermore, a bottom cover is provided at the bottom of the oil pump body, and a transmission space is formed between the bottom cover and the oil pump body, and the left driven gear, the right driven gear and the driving gear are all arranged in the transmission space, and a left through-hole and a right through-hole are opened at the bottom of the oil pump body, and a left connecting column and a right connecting column are respectively provided on the left eccentric wheel and the right eccentric wheel, and the left connecting column and the right connecting column respectively pass through the left through-hole and the right through-hole and are connected to the left driven gear and the right driven gear respectively, and a fifth bearing and a sixth bearing are respectively sleeved on the left connecting column and the right connecting column, and the fifth bearing and the sixth bearing are respectively arranged in the left through-hole and the right through-hole, and a limit platform is provided in the left through-hole and the right through-hole, and the upper surfaces of the fifth bearing and the sixth bearing are respectively abutted against the limit platforms in the left through-hole and the right through-hole, and the top ends of the left driven gear and the right driven gear are respectively abutted against the lower surfaces of the fifth bearing and the sixth bearing.

[0009] Furthermore, a left bearing groove and a right bearing groove are opened in the bottom of the bottom cover, one end of the left connecting column and the right connecting column are respectively arranged in the left bearing groove and the right bearing groove, one end of the left connecting column and the right connecting column are respectively sleeved with a third bearing and a fourth bearing, the third bearing and the fourth bearing are respectively arranged in the left bearing groove and the right bearing groove, and the lower surfaces of the left driven gear and the right driven gear are respectively in contact with the third bearing and the fourth bearing.

[0010] Furthermore, the oil outlet channel includes a left oil outlet channel and a right oil outlet channel, the left oil push rod and the right oil push rod are respectively slidably arranged in the left oil outlet channel and the right oil outlet channel, the oil pump body is provided with an oil outlet nozzle, the oil outlet nozzle is connected with the left oil outlet channel and the right oil outlet channel, the oil pump body is provided with a left oil inlet and a right oil inlet, the left oil inlet and the right oil inlet are respectively connected with the left oil outlet channel and the right oil outlet channel, the top end of the motor shaft passes through the oil pump body and is exposed outside the oil pump body, the top end of the motor shaft is provided with a scraper, and the scraper is located above the left oil inlet and the right oil inlet.

[0011] Furthermore, an oil inlet groove is provided on the oil pump body, the left oil inlet and the right oil inlet are opened in the oil inlet groove, and a filter covering the oil inlet groove is provided on the oil pump body.

[0012] Compared with the prior art, the present invention has the following outstanding and beneficial technical effects:

[0013] The utility model belongs to the technical field of grease machines, and particularly refers to a double-piston oil supply device, comprising an oil pump body, a piston assembly arranged in the oil pump body, and a power motor arranged on the oil pump body for controlling the movement of the piston assembly, wherein the piston assembly comprises a left piston mechanism and a right piston mechanism, and a left oil push rod and a right oil push rod are arranged in the oil outlet channel of the oil pump body, the left piston mechanism and the right piston mechanism are respectively connected to the left oil push rod and the right oil push rod, a motor shaft is provided on the power motor, and the left piston mechanism and the right piston mechanism are respectively connected to the left oil push rod and the right oil push rod, a transmission device is provided on the power motor, and the left piston mechanism and the right piston mechanism are respectively connected to the left oil push rod and the right oil push rod, a driving gear is provided on the motor shaft, and the left driven gear and the right driven gear are respectively provided with a left eccentric wheel and a right eccentric wheel, and the left eccentric wheel and the right eccentric wheel are respectively connected to the left oil push rod and the right piston mechanism, when the power motor starts working, the motor shaft on the power motor will start to rotate, and the rotation of the motor shaft will drive the driving gear The left and right eccentric wheels rotate synchronously, and since the driving gear is meshed with the left and right driven gears, when the driving gear rotates, it will drive the left and right driven gears to rotate synchronously respectively. After the left and right driven gears rotate, they will drive the left eccentric wheel and the right eccentric wheel to rotate respectively. At this time, the left eccentric wheel and the right eccentric wheel will respectively drive the left piston assembly and the right piston assembly to reciprocate. At the same time, the left piston assembly and the right piston assembly will respectively drive the left oil push rod and the right oil push rod to reciprocate in the oil outlet channel, so that the left oil push rod and the right oil push rod can push the butter entering the oil outlet channel to the oil outlet channel, thereby completing the oil outlet. This oil outlet method in which the left and right oil push rods simultaneously reciprocate to push the butter in the oil outlet channel has a larger oil outlet volume and better sustainability, which is beneficial for users to fill butter in mechanical equipment, can improve the work efficiency of users, and this oil outlet method through gear transmission is more stable and has higher transmission efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a state diagram of the utility model installed in the barrel body.

[0015] Figure 2 It is one of the three-dimensional diagrams of the present utility model.

[0016] Figure 3 This is the second stereogram of the present invention.

[0017] Figure 4 This is one of the cross-sectional views of the present invention.

[0018] Figure 5 This is the second sectional view of the present invention.

[0019] Figure 6 It is a schematic diagram of the structure inside the oil well pump body of the utility model.

[0020] Figure 7It is a structural schematic diagram of the left eccentric wheel and the left piston mechanism, the right piston mechanism and the right eccentric wheel of the utility model.

[0021] Figure 8 It is an exploded view of the oil pump body and the filter screen of the utility model.

[0022] Figure 9 It is a structural schematic diagram of the driving gear, the left driven gear and the right driven gear of the utility model.

[0023] Figure 10 It is a three-dimensional diagram of the oil well pump body of the utility model.

[0024] Figure 11 It is a three-dimensional diagram of the oil well pump body of the utility model.

[0025] Figure 12 It is a structural diagram of the left piston mechanism, the right piston mechanism and the transmission device of the utility model.

[0026] Figure 13 It is a structural schematic diagram of the left driven gear, the right driven gear and the bottom cover of the utility model.

[0027] Figure 14 It is the left driven gear, the right driven gear and the exploded view of the left driven gear and the right driven gear of the utility model.

[0028] Figure 15 It is a structural schematic diagram of the left driven gear and the right driven gear of the utility model.

[0029] Figure 16 It is an exploded view of the left piston mechanism and the left eccentric wheel, and the right piston mechanism and the eccentric wheel of the utility model.

[0030] Figure 17 It is an exploded view of the left eccentric wheel and the left driven gear, and the right eccentric wheel and the right driven gear of the utility model.

[0031] The meaning of the numbers in the figure:

[0032] 1-Oil pump body; 3-Power motor; 5-Left oil push rod; 6-Right oil push rod; 7-Left piston mechanism;

[0033] 8-right piston mechanism; 9-motor shaft; 10-driving gear; 11-left driven gear;

[0034] 12-right driven gear; 13-left eccentric wheel; 14-right eccentric wheel; 16-left eccentric column;

[0035] 17-first bearing; 18-left connecting part; 20-right eccentric column; 21-second bearing;

[0036] 22-right connecting part; 23-left connecting hole; 24-left limiting rod; 25-right connecting hole;

[0037] 26-right limit rod; 27-bottom cover; 28-transmission space; 29-left perforation; 30-right perforation;

[0038] 31-left connecting column; 32-right connecting column; 33-fifth bearing; 34-sixth bearing; 35-limiting platform;

[0039] 36-left bearing slot; 37-right bearing slot; 38-third bearing; 39-fourth bearing;

[0040] 40-left oil outlet channel; 41-right oil outlet channel; 42-oil outlet nozzle; 43-left oil inlet;

[0041] 44-right oil inlet; 45-scraper; 46-oil inlet tank; 47-filter. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with specific embodiments:

[0043] The utility model belongs to the technical field of grease dispensers, and particularly refers to a double-piston oil supply device, comprising an oil pump body 1, a piston assembly arranged in the oil pump body 1, and a power motor 3 arranged on the oil pump body 1 for controlling the movement of the piston assembly, and the piston assembly comprises a left piston mechanism 7 and a right piston mechanism 8, and a left oil push rod 5 and a right oil push rod 6 are arranged in the oil outlet channel of the oil pump body 1, the left piston assembly and the right piston assembly are respectively connected to the left oil push rod 5 and the right oil push rod 6, the power motor 3 has a motor shaft 9, and the left piston assembly and the right piston assembly are respectively connected to the left oil push rod 5 and the right oil push rod 6, The piston assembly is connected to the motor shaft 9 through a transmission device, which includes a driving gear 10 and a left driven gear 11 and a right driven gear 12. The driving gear 10 is arranged on the motor shaft 9, and the left driven gear 11 and the right driven gear 12 are respectively provided with a left eccentric wheel 13 and a right eccentric wheel 14, and the left eccentric wheel 13 and the right eccentric wheel 14 are respectively connected to the left oil push rod 5 and the right piston assembly. When the power motor 3 starts working, the motor shaft 9 on the power motor 3 will start to rotate, and the rotation of the motor shaft 9 will bring The driving gear 10 rotates synchronously. Since the driving gear 10 is engaged with the left driven gear 11 and the right driven gear 12, when the driving gear 10 rotates, it will drive the left driven gear 11 and the right driven gear 12 to rotate synchronously. After the left driven gear 11 and the right driven gear 12 rotate, they will drive the left eccentric wheel 13 and the right eccentric wheel 14 to rotate respectively. At this time, the left eccentric wheel 13 and the right eccentric wheel 14 will respectively drive the left piston assembly and the right piston assembly to reciprocate. At the same time, the left piston assembly and the right piston assembly will respectively drive The left and right oil push rods 5 and 6 are moved to reciprocate in the oil outlet channel, so that the left and right oil push rods 5 and 6 can push the butter entering the oil outlet channel to the oil outlet channel, thereby completing the oil outlet. This oil outlet method in which the left and right oil push rods 5 and 6 simultaneously reciprocate to push the butter in the oil outlet channel has a larger oil outlet volume and better sustainability, which is beneficial for users to add butter to mechanical equipment and can improve users' work efficiency. In addition, this oil outlet method through gear transmission is more stable and has higher transmission efficiency.

[0044] Preferably, the left piston mechanism 7 includes a left connecting rod, a left eccentric column 16 is provided on the left eccentric wheel 13, a first bearing 17 is sleeved on the left eccentric column 16, a left connecting portion 18 is provided on the left connecting rod, and the left connecting portion 18 is sleeved on the first bearing 17, the left piston mechanism 7 includes a right connecting rod, a right eccentric column 20 is provided on the right eccentric wheel 14, a second bearing 21 is sleeved on the right eccentric column 20, a right connecting portion 22 is provided on the right connecting rod, and the right connecting portion 22 is sleeved on the second bearing 21; since the left eccentric column 16 of the left eccentric wheel 13 is sleeved on the left eccentric column 16, the left connecting portion 18 is sleeved on the first bearing 17, and the left piston mechanism 7 includes a right connecting rod, a right eccentric column 20 is provided on the right eccentric column 20, a second bearing 21 is sleeved on the right eccentric column 20, and a right connecting portion 22 is sleeved on the second bearing 21. A first bearing 17 is provided, and the left connecting rod is sleeved on the first bearing 17 through the left connecting part 18, and a second bearing 21 is sleeved on the right eccentric column 20 of the right eccentric wheel 14, and the right connecting rod is sleeved on the second bearing 21 through the right connecting part 22. When the left eccentric wheel 13 and the right eccentric wheel 14 rotate, the left eccentric wheel 13 and the right eccentric wheel 14 will respectively drive the left connecting rod and the right connecting rod to swing, and the setting of the first bearing 17 and the second bearing 21 can make the left connecting rod and the right connecting rod swing more smoothly, reducing the friction that the left connecting rod and the right connecting rod need to overcome during the swinging process.

[0045] Preferably, a left connecting hole 23 is provided on the left eccentric wheel 13, a left limiting rod 24 is provided in the left connecting hole 23, the top end of the left limiting rod 24 is exposed outside the left connecting hole 23 and abuts against the first bearing 17, and a right connecting hole 25 is provided on the right eccentric wheel 14, a right limiting rod 26 is provided in the right connecting hole 25, the top end of the right limiting rod 26 is exposed outside the right connecting hole 25 and abuts against the second bearing 21; the left connecting hole 23 of the left eccentric wheel 13 is provided with a left limiting rod 24, and the top end of the left limiting rod 24 is exposed outside the left connecting hole 23 and abuts against the first bearing 17, which can limit the first bearing 17 The left eccentric column 16 is separated from the first bearing 17, so that the first bearing 17 can be stably installed on the left eccentric column 16, and the normal transmission between the left connecting rod and the left eccentric wheel 13 will not be affected by the separation of the first bearing 17 from the left eccentric column 16; a right limiting rod 26 is provided in the right connecting hole 25 of the right eccentric wheel 14, and the top end of the right limiting rod 26 is exposed outside the right connecting hole 25 and abuts against the second bearing 21, which can limit the second bearing 21 from being separated from the right eccentric column 20, so that the second bearing 21 can be stably installed on the right eccentric column 20, and the normal transmission between the right connecting rod and the right eccentric wheel 14 will not be affected by the separation of the second bearing 21 from the right eccentric column 20.

[0046] Preferably, a bottom cover 27 is provided at the bottom of the oil pump body 1, and a transmission space 28 is formed between the bottom cover 27 and the oil pump body 1. The left driven gear 11, the right driven gear 12 and the driving gear 10 are all arranged in the transmission space 28. A left through-hole 29 and a right through-hole 30 are opened at the bottom of the oil pump body 1. A left connecting column 31 and a right connecting column 32 are respectively provided on the left eccentric wheel 13 and the right eccentric wheel 14. The left connecting column 31 and the right connecting column 32 respectively pass through the left through-hole 29 and the right through-hole 30 and are respectively connected to the left driven gear 11 and the right driven gear 12 is connected, the left connecting column 31 and the right connecting column 32 are respectively provided with a fifth bearing 33 and a sixth bearing 34, the fifth bearing 33 and the sixth bearing 34 are respectively arranged in the left through-hole 29 and the right through-hole 30, and the left through-hole 29 and the right through-hole 30 are both provided with a limit platform 35, the upper surfaces of the fifth bearing 33 and the sixth bearing 34 are respectively abutted against the limit platforms 35 in the left through-hole 29 and the right through-hole 30, and the top ends of the left driven gear 11 and the right driven gear 12 are respectively abutted against the lower surfaces of the fifth bearing 33 and the sixth bearing 34;

[0047] The transmission space 28 between the bottom cover 27 and the oil pump body 1 enables the left driven gear 11, the right driven gear 12 and the driving gear 10 to be smoothly installed on the oil pump body 1, and the left through-hole 29 and the right through-hole 30 at the bottom of the oil pump body 1 allow the left connecting column 31 on the left eccentric wheel 13 and the right connecting column 32 on the right eccentric wheel 14 to enter the transmission space 28, so that the left connecting column 31 and the right connecting column 32 can be smoothly connected to the left driven gear 11 and the right driven gear 12 respectively, and the left connecting column 31 and the right connecting column 32 are respectively sleeved with a fifth bearing 33 and a sixth bearing 34, and the fifth bearing 33 and the sixth bearing 34 are respectively arranged in the left through-hole 29 and the right through-hole 30, and the upper and lower surfaces of the fifth bearing 33 are respectively aligned with the limit platform in the left through-hole 29 35 and the top end of the left driven gear 11, so that the fifth bearing 33 can be stably installed in the left through-hole 29, and the fifth bearing 33 can be prevented from moving arbitrarily on the left connecting column 31; and the upper and lower surfaces of the sixth bearing 34 respectively abut against the limit platform 35 in the right through-hole 30 and the top end of the right driven gear 12, so that the sixth bearing 34 can be stably installed in the left through-hole 29, and the sixth bearing 34 can be prevented from moving arbitrarily on the right connecting column 32. The arrangement of the fifth bearing 33 and the sixth bearing 34 can reduce the friction generated by the left eccentric wheel 13 and the right eccentric wheel 14 during high-speed rotation, and can reduce the wear of the left connecting column 31 and the right connecting column 32, thereby increasing the service life of the left eccentric wheel 13 and the right eccentric wheel 14.

[0048] Preferably, a left bearing groove 36 and a right bearing groove 37 are formed in the bottom of the bottom cover 27, and one end of the left connecting column 31 and the right connecting column 32 are respectively arranged in the left bearing groove 36 and the right bearing groove 37, and one end of the left connecting column 31 and the right connecting column 32 are respectively sleeved with a third bearing 38 and a fourth bearing 39, and the third bearing 38 and the fourth bearing 39 are respectively arranged in the left bearing groove 36 and the right bearing groove 37, and the lower surfaces of the left driven gear 11 and the right driven gear 12 are respectively in contact with the third bearing 38 and the fourth bearing 39; the left connecting column 31 and the right connecting column 32 are respectively sleeved with a third bearing 38 and a fourth bearing 39; The third bearing 38 on one end of the connecting column 31 is set in the left bearing groove 36 in the bottom of the bottom cover 27, and the fourth bearing 39 on one end of the right connecting column 32 is set in the right bearing groove 37 in the bottom of the bottom cover 27. The third bearing 38 cooperates with the fifth bearing 33, which can not only limit the angular deviation of the left connecting column 31 but also make the left connecting column 31 rotate more smoothly. The fourth bearing 39 cooperates with the sixth bearing 34 to achieve the same effect, making the left connecting column 31 rotate more smoothly, and the angle of the left connecting column 31 will not be offset during the rotation process.

[0049] Preferably, the oil outlet channel includes a left oil outlet channel 40 and a right oil outlet channel 41, the left oil push rod 5 and the right oil push rod 6 are slidably arranged in the left oil outlet channel 40 and the right oil outlet channel 41 respectively, and the oil pump body 1 is provided with an oil outlet nozzle 42, and the oil outlet nozzle 42 is connected with the left oil outlet channel 40 and the right oil outlet channel 41. The oil pump body 1 is provided with a left oil inlet 43 and a right oil inlet 44, and the left oil inlet 43 and the right oil inlet 44 are connected with the left oil outlet channel 40 and the right oil outlet channel 41 respectively. The top end of the motor shaft 9 passes through the oil pump body 1 and is exposed outside the oil pump body 1, and the top end of the motor shaft 9 is provided with a scraper 45, and the scraper 45 is located above the left oil inlet 43 and the right oil inlet 44; the scraper 45 is used to push the butter around the left oil inlet 43 and the right oil inlet 44 into the left oil inlet 43 and the right oil inlet 44, so that the utilization rate of the residual butter can be higher.

[0050] Preferably, an oil inlet groove 46 is provided on the oil pump body 1, and the left oil inlet port 43 and the right oil inlet port 44 are opened in the oil inlet groove 46. The oil pump body 1 is provided with a filter screen 47 covering the oil inlet groove 46; since the butter may contain some impurities or particles, the setting of the filter screen 47 can prevent the impurities or particles in the butter from entering the oil pump body 1, which can improve the service life of the oil pump body 1.

[0051] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A dual-piston oil supply device, comprising an oil pump body (1), a piston assembly disposed in the oil pump body (1), and a power motor (3) disposed on the oil pump body (1) for controlling the movement of the piston assembly, characterized in that: An oil outlet channel is provided in the oil pump body (1), a left oil push rod (5) and a right oil push rod (6) are slidably provided in the oil outlet channel, the piston assembly comprises a left piston mechanism (7) and a right piston mechanism (8), the left piston mechanism (7) and the right piston mechanism (8) are respectively connected to the left oil push rod (5) and the right oil push rod (6), the power motor (3) is provided with a motor shaft (9), a transmission device is provided between the motor shaft (9) and the left piston mechanism (7) and the right piston mechanism (8), the transmission device comprises The invention comprises a driving gear (10), a left driven gear (11) and a right driven gear (12), wherein the driving gear (10) is arranged on the motor shaft (9), and the driving gear (10) is meshed with the left driven gear (11) and the right driven gear (12), and the left driven gear (11) and the right driven gear (12) are respectively provided with a left eccentric wheel (13) and a right eccentric wheel (14), and the left eccentric wheel (13) and the right eccentric wheel (14) are respectively connected to the left oil push rod (5) and the right piston mechanism (8).

2. A dual-piston oil supply device according to claim 1, characterized in that: The left piston mechanism (7) includes a left connecting rod, a left eccentric column (16) is provided on the left eccentric wheel (13), a first bearing (17) is sleeved on the left eccentric column (16), a left connecting portion (18) is provided on the left connecting rod, and the left connecting portion (18) is sleeved on the first bearing (17); the left piston mechanism (7) includes a right connecting rod, a right eccentric column (20) is provided on the right eccentric wheel (14), a second bearing (21) is sleeved on the right eccentric column (20), a right connecting portion (22) is provided on the right connecting rod, and the right connecting portion (22) is sleeved on the second bearing (21).

3. A dual-piston oil supply device according to claim 2, characterized in that: The left eccentric column (16) is provided with a left connecting hole (23), a left limiting rod (24) is provided in the left connecting hole (23), a top end of the left limiting rod (24) is exposed outside the left connecting hole (23) and abuts against the first bearing (17), and the right eccentric column (20) is provided with a right connecting hole (25), a right limiting rod (26) is provided in the right connecting hole (25), a top end of the right limiting rod (26) is exposed outside the right connecting hole (25) and abuts against the second bearing (21).

4. The dual-piston oil supply device according to claim 1, characterized in that: The bottom of the oil pump body (1) is provided with a bottom cover (27), and a transmission space (28) is formed between the bottom cover (27) and the oil pump body (1). The left driven gear (11), the right driven gear (12) and the driving gear (10) are all arranged in the transmission space (28). The bottom of the oil pump body (1) is provided with a left through hole (29) and a right through hole (30). The left eccentric wheel (13) and the right eccentric wheel (14) are provided with a left connecting column (31) and a right connecting column (32) respectively. The left connecting column (31) and the right connecting column (32) respectively pass through the left through hole (29) and the right through hole (30) and are connected to the left driven gear (11) and the right driven gear (12) respectively. 2), the left connecting column (31) and the right connecting column (32) are respectively provided with a fifth bearing (33) and a sixth bearing (34), the fifth bearing (33) and the sixth bearing (34) are respectively arranged in the left through hole (29) and the right through hole (30), and the left through hole (29) and the right through hole (30) are both provided with a limiting platform (35), the upper surfaces of the fifth bearing (33) and the sixth bearing (34) are respectively in contact with the limiting platform (35) in the left through hole (29) and the right through hole (30), and the top ends of the left driven gear (11) and the right driven gear (12) are respectively in contact with the lower surfaces of the fifth bearing (33) and the sixth bearing (34).

5. A dual-piston oil supply device according to claim 4, characterized in that: A left bearing groove (36) and a right bearing groove (37) are provided in the bottom of the bottom cover (27), one end of the left connecting column (31) and the right connecting column (32) are respectively arranged in the left bearing groove (36) and the right bearing groove (37), one end of the left connecting column (31) and the right connecting column (32) are respectively sleeved with a third bearing (38) and a fourth bearing (39), the third bearing (38) and the fourth bearing (39) are respectively arranged in the left bearing groove (36) and the right bearing groove (37), and the lower surfaces of the left driven gear (11) and the right driven gear (12) are respectively in contact with the third bearing (38) and the fourth bearing (39).

6. The dual-piston oil supply device according to claim 1, characterized in that: The oil outlet passage comprises a left oil outlet passage (40) and a right oil outlet passage (41); the left oil push rod (5) and the right oil push rod (6) are respectively slidably arranged in the left oil outlet passage (40) and the right oil outlet passage (41); an oil outlet nozzle (42) is provided on the oil pump body (1); the oil outlet nozzle (42) is connected to the left oil outlet passage (40) and the right oil outlet passage (41); a left oil inlet (43) and a right oil inlet (44) are opened on the oil pump body (1); the left oil inlet (43) and the right oil inlet (44) are respectively connected to the left oil outlet passage (40) and the right oil outlet passage (41); the top end of the motor shaft (9) passes through the oil pump body (1) and is exposed outside the oil pump body (1); a scraper (45) is provided on the top end of the motor shaft (9); the scraper (45) is located above the left oil inlet (43) and the right oil inlet (44).

7. A dual-piston oil supply device according to claim 6, characterized in that: The oil pump body (1) is provided with an oil inlet groove (46), the left oil inlet port (43) and the right oil inlet port (44) are opened in the oil inlet groove (46), and the oil pump body (1) is provided with a filter screen (47) covering the oil inlet groove (46).

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