Electric lubrication pump

Abstract

The utility model relates to an electric lubricating pump, comprising a mounting plate, a motor, a pump body and an oil tank, the oil tank is arranged below the mounting plate, the pump body is arranged in the oil tank, the motor is arranged on the mounting plate and has an output shaft that extends into the oil tank, the output shaft is connected with the power input end of the pump body, characterized in that a primary central gear is arranged on the output shaft, the power output end of the motor is provided with a planetary gear reduction mechanism, the power input end of the planetary gear reduction mechanism is meshed with the primary central gear to drive, the power output end is located in the oil tank and is connected with a propeller blade for stirring grease and feeding the grease into the oil suction port of the pump body. The motor passes through the concentric speed reducer, the inner ring high speed is used for normal pump body drive, the outer ring low speed is used for driving propeller blade to stir grease, so that the grease with higher consistency is not easy to solidify and block, and is fed to the oil suction port of the pump body under the spiral surface pressure feeding of the propeller blade.

Description

Technical Field

[0001] The present invention relates to a grease lubrication pump, in particular to a grease lubrication pump driven by a motor. Background Art

[0002] Grease is generally suitable as a lubricant for heavy-load, low-speed equipment such as vehicles, power generation equipment, forging equipment, papermaking machinery, construction machinery, and textile machinery. Compared to thin oil lubrication, grease lubrication not only helps maintain the oil film for a long time and is not easy to lose, but also has good load-bearing and impact resistance. It also effectively prevents the intrusion of dirt and debris, such as dust, water vapor, and fluff. Each time new grease is added, the old grease and dirt are squeezed out of the friction pair, resulting in a significant wear-reducing and anti-wear effect. Electric fixed-point quantitative centralized grease lubrication device, an electric grease lubrication pump, a quantitative distributor, and pipelines and pipeline accessories form an electric fixed-point quantitative centralized lubrication device. Electric grease lubrication pumps can be divided into the following categories according to the location of the motor and oil tank: ① straight-type electric grease lubrication pump, characterized by the motor and circuit control board on the top and the oil tank on the bottom; ② inverted electric grease lubrication pump, characterized by the motor and circuit control board on the bottom and the oil tank on the top.

[0003] The advantages of a tandem electric grease lubrication pump are: when adding grease to the tank, there is no need to worry about whether air is brought in, and it is easy to use and maintain. The disadvantage is that it can only use the thinnest 000# grease. Grease with a consistency of 00# and above has poor fluidity, and when pumping, the grease does not have time to fill the oil suction area, resulting in air absorption, which restricts the scope of application of the lubricating medium. For relevant literature, please refer to the Chinese utility model patent No. ZL202021046283.0, "An Electric Grease Automatic Lubrication Pump" (authorization announcement No. CN212430413U); you can also refer to the Chinese utility model patent No. ZL202023141653.1, "Electric Lubrication Pump and Lubrication Device Having the Electric Lubrication Pump" (authorization announcement No. CN214222714U).

[0004] Advantages of an inverted electric grease lubrication pump: Because the oil tank and grease are located above, and they are generally equipped with a suction-enhancing piston or vanes, they can handle thicker greases such as 00#, 0#, and 1#. Some 2# greases can also function normally in environments with temperatures not lower than -10°C. However, disadvantages of inverted grease pumps with suction-enhancing pistons are that air must not be introduced into the oil tank when the grease is added, as this is difficult to handle and results in significant grease waste when the air is exhausted. Inverted grease pumps with suction-enhancing vanes can introduce debris that clogs the filter, making it difficult to handle and requiring the removal of the oil tank (tank), resulting in significant grease waste. Installing an external oil filter is also cumbersome, requiring significant piping space and increased costs. For relevant literature, please refer to the Chinese utility model patent "Micro Electric Grease Pump" with patent number ZL201920258647.2 (authorization announcement number CN209569517U); you can also refer to CN211853486U, CN206973253U, etc. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a sequential electric lubrication pump suitable for higher viscosity grease in view of the above technical status quo.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an electric lubrication pump, including a mounting plate, a motor, a pump body and an oil tank, the aforementioned oil tank is arranged below the mounting plate, the aforementioned pump body is arranged in the oil tank, the aforementioned motor is arranged on the mounting plate and has an output shaft extending downward into the oil tank, the output shaft is connected to the power input end of the aforementioned pump body, and is characterized in that a first-stage central gear is provided on the output shaft, the power output end of the motor is provided with a planetary gear reduction mechanism, the power input end of the planetary gear reduction mechanism is meshed with the aforementioned first-stage central gear for transmission, and the power output end is located in the oil tank and is connected to a propeller blade for stirring grease and capable of delivering grease into the oil suction port of the pump body.

[0007] Preferably, the pump body is located below the propeller blades.

[0008] The planetary gear reduction mechanism is provided with a sleeve at the power output end. The sleeve has a central shaft hole for the output shaft to pass through. Multiple propeller blades are radially spaced and arranged on the outer circumference of the sleeve. The pump body is located directly below the sleeve. After the propeller blades stir the grease, it is collected toward the oil inlet of the pump body, ensuring that the pump body receives the grease.

[0009] Preferably, the planetary gear reduction mechanism includes a gearbox, a ring gear and at least two stages of planetary gear trains, each stage of the planetary gear train includes a central gear, a planetary carrier and planetary gears meshing with the aforementioned ring gear, at least two of the aforementioned planetary gears are arranged on the front end face of the planetary carrier of the same stage, the aforementioned central gear is arranged on the back side of the planetary carrier of the previous stage and is hollow for the output shaft to pass through, the aforementioned central gear is meshed with adjacent planetary gears for transmission, and the aforementioned planetary carrier has a through hole for the output shaft to pass through; the planetary gears of the first stage are meshed with the first stage central gear; the planetary carrier of the final stage planetary gear train rotates in cooperation with the gearbox to form the power output end of the planetary gear reduction mechanism.

[0010] As an advantage, the planetary gear reduction mechanism is a three-stage planetary gear train and includes

[0011] a first-stage planet carrier, located inside the ring gear;

[0012] A first-stage planetary gear is provided on the front end surface of the first-stage planetary carrier;

[0013] A secondary sun gear is provided on the rear end face of the primary planet carrier;

[0014] a secondary planet carrier, located inside the ring gear;

[0015] A secondary planetary gear is provided on the front end surface of the secondary planetary carrier;

[0016] The third-stage sun gear is provided on the rear end face of the aforementioned second-stage planetary carrier;

[0017] A three-stage planetary carrier, which rotates in conjunction with the gearbox to form a low-speed, high-torque power output end of the planetary gear reduction mechanism; and

[0018] The three-stage planetary gear is arranged on the front end surface of the three-stage planetary carrier.

[0019] Furthermore, the outer end face of the three-stage planetary carrier is provided with at least two connecting rods parallel to the output shaft direction, the end of the connecting rod is provided with a sleeve, the middle of the sleeve has an axial hole for the output shaft to pass through, and the propeller blades are multiple and spaced apart on the outer periphery of the aforementioned sleeve.

[0020] Considering the convenient installation of the pump body, a pump bracket is provided on the lower end face of the mounting plate. The pump bracket includes at least one vertical pole and a positioning plate provided at the lower end of the vertical pole. The upper end of the vertical pole is connected to the lower end face of the mounting plate, and the pump body is provided on the positioning plate.

[0021] The vertical rod is hollow and contains wires. The positioning plate has a positioning slot, which houses a heater plate connected to the wires. The vertical rod not only connects the heaters but also serves as a wire guide, preventing the heater plate's wires from getting stuck due to grease, facilitating maintenance.

[0022] The vertical rod is hollow to form an oil passage, with an external oil outlet connector at the upper end and an oil pipe at the lower end, which is connected to the oil outlet of the pump body. In addition to its connection function, the vertical rod also serves as an oil passage, reducing the layout of oil passages on the inner wall and reducing the risk of grease leakage.

[0023] The cross section of the lower end of the oil tank is generally circular, and the upright column is arranged close to the inner wall of the oil tank. The circular shape is consistent with the running trajectory of the stirring propeller blade, which can ensure that the grease in the oil tank can be swept without missing any dead corners, and is also conducive to improving the utilization rate of the grease.

[0024] Compared with existing technologies, the present invention has the following advantages: the motor outputs two concentric power paths through a concentric reducer: one path is the primary power source for high-speed rotation of the pump body, while the other path is the secondary power source for low-speed rotation of the propeller blades after being decelerated and torque-increased by a planetary reducer. The high-speed rotation of the inner ring is used for normal pump body drive, while the low-speed, high-torque rotation of the outer ring drives the blades to stir the grease. This prevents high-viscosity grease from solidifying and agglomerating, and the helical surface of the propeller blades pressurizes and feeds it to the pump intake. The propeller blades act as a screw pump, allowing even high-viscosity grease to be used normally, thus expanding the range of grease consistencies that can be used with the tandem electric grease lubrication pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of an embodiment.

[0026] Figure 2 It is a bottom view of the embodiment.

[0027] Figure 3 It is a three-dimensional cross-sectional view of an embodiment.

[0028] Figure 4 This is a schematic diagram of the structure after removing the cover and oil phase in the embodiment.

[0029] Figure 5 for Figure 4 Schematic diagram of the structure from another perspective.

[0030] Figure 6 Schematic diagram of the pump bracket structure in the embodiment.

[0031] Figure 7 for Figure 6 Partial exploded view.

[0032] Figure 8 for Figure 7 Partial reverse view of the center positioning plate.

[0033] Figure 9 This is a diagram of the motor and gearbox combination in the embodiment.

[0034] Figure 10 for Figure 9 Exploded diagram of .

[0035] Figure 11 for Figure 10 Exploded view from another perspective. DETAILED DESCRIPTION

[0036] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0037] like Figure 1 、 Figure 3 、 Figure 4 and Figure 5 As shown, the electric lubrication pump in this embodiment includes a mounting plate 30, a motor 1, a planetary gear reduction mechanism 5, a pump body 3, a pump bracket 4 and an oil tank 10. The oil tank 10 is arranged below the mounting plate 30, and the pump body 3 is arranged in the oil tank 10. The motor 1 is arranged on the mounting plate 30 and has an output shaft 11 extending downward into the oil tank 10. The output shaft 11 is connected to the power input end of the pump body 3. A first-stage central gear 51 is provided on the output shaft 11. The power output end of the motor 1 is provided with a planetary gear reduction mechanism 5. The power input end of the planetary gear reduction mechanism 5 is meshed with the first-stage central gear 51 for transmission. The power output end is located in the oil tank 10 and is connected to a propeller blade 2 for stirring grease and delivering the grease into the oil suction port of the pump body. A cover plate 20 is provided on the mounting plate 30, and the outer periphery of the motor 1 is located in the cover plate 20. The propeller blades 2 in this embodiment have three pieces (it can also be two pieces or more than three pieces), which are evenly arranged. The propeller blades 2 stir the grease to promote flow. At the same time, the spiral surface of the propeller blades provides pressure to the grease to the oil suction port of the pump body.

[0038] Combine Figure 2 As shown, the cross-section of the lower end of the oil tank 10 is generally circular, and the circle is consistent with the running trajectory of the stirring propeller blade, which can ensure that the grease in the oil tank 10 can be swept up and then fed to the oil suction port of the pump body, ensuring that there are no missed dead corners, which is conducive to improving the utilization rate of the grease.

[0039] Combine Figure 9 、 Figure 10 and Figure 11 As shown, the planetary gear reduction mechanism 5 in this embodiment is a three-stage planetary gear system, specifically including a gear box 56, a ring gear 54, a first-stage planetary carrier 71, a first-stage planetary gear 61, a second-stage central gear 52, a second-stage planetary carrier 72, a second-stage planetary gear 62, a third-stage central gear 53, a third-stage planetary carrier 73 and a third-stage planetary gear 63.

[0040] The first-stage planetary gears 61, the second-stage planetary gears 62, and the third-stage planetary gears 63 all mesh with the internal teeth of the ring gear 54. The first-stage planetary carrier 71 and the second-stage planetary carrier 72 are located within the ring gear 54. There are three first-stage planetary gears 61, which are located on the front end of the first-stage planetary carrier 71 and mesh with the first-stage sun gear 51 for transmission.

[0041] The secondary sun gear 52 is provided at the rear end face of the primary planet carrier 71 ; there are three secondary planetary gears 62 , which are provided at the front end face of the secondary planet carrier 72 and are all meshed with the secondary sun gear 52 for transmission.

[0042] The tertiary center gear 53 is arranged on the rear end face of the secondary planetary carrier 72; the tertiary planetary carrier 73 and the gear box 56 are rotated together through the bearing 55, and the tertiary planetary carrier 73 forms the power output end of the planetary gear reduction mechanism 5; there are also three tertiary planetary gears 63, which are arranged on the front end face of the tertiary planetary carrier 73 and are all meshed with the tertiary center gear 53 for transmission.

[0043] In this embodiment, the output shaft 11 passes through the first-stage planet carrier 71 , the second-stage sun gear 52 , the second-stage planet carrier 72 , the third-stage sun gear 53 and the third-stage planet carrier 73 in sequence.

[0044] Four connecting rods 22 are provided on the outer end surface of the three-stage planetary carrier 73, parallel to the output shaft 11. Sleeves 21 are provided at the ends of these connecting rods 22. Sleeve 21 has a central axial hole for the output shaft 11 to pass through. Three propeller blades 2 are radially spaced apart on the outer circumference of sleeve 21. The pump body 3 is located directly below sleeve 21. In this embodiment, pump body 3 is preferably a gear pump.

[0045] Motor 1 provides power to the pump body via output shaft 11 and rotational power to the propeller blades via planetary gear reduction mechanism 5. These two power sources are arranged concentrically, with the output shaft rotating at a speed greater than the propeller blades, exceeding 2000 rpm while the propeller blades rotate at a speed less than 50 rpm. After stirring, the propeller blades funnel grease toward the pump body's oil inlet, ensuring that the pump body receives the grease. The grease used in this embodiment can be expanded to include 00#, 0#, 1#, and 2# greases.

[0046] Combine Figure 6 、 Figure 7 and Figure 8As shown, the lower end surface of the mounting plate 30 is provided with a pump bracket 4. This bracket 4 comprises four uprights 42 and positioning plates 41 located at the lower ends of the uprights 42. The four uprights 42 are located at the four corners of the rectangle and are positioned against the inner wall of the fuel tank 10. The upper ends of the uprights 42 are connected to the lower end surface of the mounting plate 30, and the pump body 3 is mounted on the positioning plates 41. In this embodiment, the fuel tank 10 has four convex semi-cylindrical chambers around its perimeter for accommodating the uprights 42 without interfering with the circumferential space for the propeller blades to rotate.

[0047] One of the vertical rods 42 is hollow and contains a wire 46. The positioning plate 41 has a positioning slot 411, which houses a heater 44 connected to the wire 46. The heater 44 can utilize a PTC (Positive Temperature Coefficient) to increase the temperature of the grease during operation, thereby improving its fluidity. The other vertical rod 42 is hollow, forming an oil passageway. Its upper end is connected to an external oil outlet connector 45, and its lower end is connected to an oil pipe 43, which is connected to the oil outlet of the pump body 3. In addition to its connection function, the vertical rod 42 also serves as an oil passageway and a wire guide.

[0048] During assembly, the motor 1 and planetary gear reduction mechanism 5 are mounted as a single unit on the mounting plate 30. The propeller blades, sleeve, and connecting rod assembly are then assembled with the three-stage planetary carrier 73. The pump bracket, which houses the pump body, is then connected and fixed to the mounting plate to form a single unit. Finally, the oil tank 10 is placed on the lower end of the mounting plate. This allows for easy assembly and disassembly, facilitating maintenance.

[0049] This embodiment can also be equipped with a refueling filter to effectively ensure the cleanliness of the grease added to the fuel tank. When the refueling resistance increases, the refueling filter can be unscrewed to facilitate cleaning of the filter element, making daily maintenance work simple and quick, and ordinary operators can do it at a glance. The overflow valve, automatic pressure relief valve, etc. are all installed on the mounting plate, away from the oil suction area of ​​the pump body. The grease with a thinned viscosity that flows out through the overflow port of the overflow valve and the unloading port of the pressure relief valve falls on the top layer of grease in the oil tank, ensuring that the grease at the oil pump suction port is of normal viscosity, thereby avoiding the phenomenon of the oil pressure decreasing over time. In addition, the pressure regulating mechanism of the overflow valve is installed outside the mounting plate to facilitate the adjustment of the output pressure.

Claims

1. An electric lubrication pump, comprising a mounting plate (30), a motor (1), a pump body (3) and an oil tank (10), wherein the oil tank (10) is arranged below the mounting plate (30), the pump body (3) is arranged in the oil tank (10), the motor (1) is arranged on the mounting plate (30) and has an output shaft (11) extending downward into the oil tank (10), the output shaft (11) is connected to the power input end of the pump body (3), and is characterized in that The output shaft (11) is provided with a primary sun gear (51), the power output end of the motor (1) is provided with a planetary gear reduction mechanism (5), the power input end of the planetary gear reduction mechanism (5) is meshed with the primary sun gear (51) for transmission, and the power output end is located in the oil tank (10) and is connected to a propeller blade (2) for stirring grease and delivering the grease to the oil suction port of the pump body; The pump body (3) is located below the propeller blades (2); The power output end of the planetary gear reduction mechanism (5) is provided with a sleeve (21), the middle portion of which has an axial hole for the output shaft (11) to pass through, the propeller blades (2) are multiple and radially arranged on the outer periphery of the sleeve (21), and the pump body (3) is located directly below the sleeve (21); The pump body is a gear pump.

2. The electric lubrication pump according to claim 1, characterized in that The planetary gear reduction mechanism (5) comprises a gearbox (56), a ring gear (54) and at least two stages of planetary gear trains, each stage of the planetary gear train comprises a central gear, a planetary carrier and planetary gears meshing with the aforementioned ring gear (54), at least two of the aforementioned planetary gears are arranged on the front end face of the planetary carrier of the same stage, the aforementioned central gear is arranged on the back face of the planetary carrier of the previous stage and is hollow for the output shaft (11) to pass through, the aforementioned central gear is meshed with the adjacent planetary gears for transmission, and the aforementioned planetary carrier has a through hole for the output shaft (11) to pass through; the planetary gears of the first stage are meshed with the first stage central gear (51); the planetary carrier of the final stage planetary gear train rotates with the gearbox (56) to form the power output end of the planetary gear reduction mechanism (5), and the power output end is used to drive the propeller blades.

3. The electric lubrication pump according to claim 2, characterized in that The planetary gear reduction mechanism (5) is a three-stage planetary gear train and includes a first-stage planet carrier (71) located inside the ring gear (54); A first-stage planetary gear (61) is provided on the front end surface of the first-stage planetary carrier (71); A secondary sun gear (52) is provided on the rear end face of the primary planet carrier (71); a secondary planet carrier (72) located inside the ring gear (54); A secondary planetary gear (62) is provided on the front end surface of the secondary planetary carrier (72); A third-stage central gear (53) is provided on the rear end face of the aforementioned second-stage planetary carrier (72); A three-stage planetary carrier (73) is rotatably coupled with the gear box (56) to form a power output end of the planetary gear reduction mechanism (5); and The three-stage planetary gear (63) is arranged on the front end surface of the three-stage planetary carrier (73).

4. The electric lubrication pump according to claim 3, characterized in that The outer end surface of the three-stage planetary carrier (73) is provided with at least two connecting rods (22) in a direction parallel to the output shaft (11), and the ends of the connecting rods are provided with sleeves (21).

5. The electric lubrication pump according to claim 1, characterized in that A pump bracket (4) is provided on the lower end surface of the mounting plate (30), and the pump bracket (4) includes at least one vertical rod (42) and a positioning plate (41) provided at the lower end of the vertical rod (42). The upper end of the vertical rod (42) is connected to the lower end surface of the mounting plate (30), and the pump body (3) is provided on the positioning plate (41).

6. The electric lubrication pump according to claim 5, characterized in that The vertical rod (42) is hollow and has a wire (46) arranged inside. The positioning plate (41) has a positioning groove (411). A heating plate (44) is arranged in the positioning groove (411). The heating plate (44) is connected to the wire (46).

7. The electric lubrication pump according to claim 5, characterized in that The vertical rod (42) is hollow to form an oil passage, and the upper end is connected to an external oil outlet joint (45), and the lower end is connected to an oil pipe (43), and the oil pipe (43) is connected to the oil outlet end of the pump body (3).

8. The electric lubrication pump according to claim 5, characterized in that The cross section of the lower end of the oil tank (10) is generally circular, and the vertical pole is arranged close to the inner wall of the oil tank (10).

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