Double-impeller self-lubricating speed reducer

Abstract

The application relates to a speed reduction transmission device. The purpose is to provide a double-impeller self-lubricating speed reducer which is solid, durable, stable in operation and good in lubrication effect. The technical scheme is as follows: a double-impeller self-lubricating speed reducer comprises a casing, an input shaft and an output shaft rotatably positioned on the casing, and a transmission mechanism for transmitting power between the input shaft and the output shaft; bearing bosses are arranged on the inner walls of the two sides of the casing and comprise an input shaft boss, an output shaft boss and a plurality of transmission shaft bosses; characterized in that: pump oil mechanisms and oil distribution mechanisms are arranged on the two sides of the casing; the pump oil mechanism comprises a pressing plate and an impeller which are sequentially arranged between an output shaft bearing and an output shaft flange; an oil outlet is arranged on the pressing plate; the impeller is fixed with the output shaft; and an oil supply cavity accommodating the impeller is formed between the pressing plate and the output shaft flange.

Description

Technical Field

[0001] This invention relates to a speed reduction transmission device, specifically a speed reducer. Background Technology

[0002] Existing speed reducers have the following drawbacks: Their complex structure, including external components such as motors, oil pumps, and oil pipes, leads to a high failure rate. They are easily damaged by impacts during use, and this damage is difficult for operators to detect. If these components are not repaired promptly, it will affect the normal supply of lubricating oil, potentially causing bearing burnout and gear damage, ultimately rendering the speed reducer unusable. Furthermore, because the motor speed is fixed, the lubricating oil supply cannot be adjusted in real time according to the speed reducer's operating conditions. When the speed reducer operates at low speeds, the required oil supply is significantly higher, making lubricating oil leakage at the oil seal location extremely easy and difficult to resolve effectively. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings in the above-mentioned background technology and provide a dual-impeller self-lubricating reducer, which should be robust and durable, stable in operation, and have good lubrication effect.

[0004] The technical solution of this invention is:

[0005] A dual-impeller self-lubricating reducer includes a housing, an input shaft and an output shaft rotatably positioned on the housing, and a transmission mechanism for transmitting power between the input shaft and the output shaft; bearing bosses are provided on the inner walls of both sides of the housing, including an input shaft boss, an output shaft boss, and a plurality of transmission shaft bosses; characterized in that: an oil pumping mechanism and an oil distribution mechanism are provided on both sides of the housing;

[0006] The oil pumping mechanism includes a pressure plate and an impeller arranged sequentially between the output shaft bearing and the output shaft flange. The pressure plate is provided with an oil outlet, the impeller is fixed to the output shaft, and an oil supply chamber for accommodating the impeller is formed between the pressure plate and the output shaft flange.

[0007] The oil distribution mechanism includes a number of oil inlets arranged sequentially along the power transmission direction of the reducer. The two ends of the oil inlets are respectively connected to the inner circumferential surfaces of two adjacent bearing bosses. The oil inlet of the output shaft boss is also connected to the oil outlet of the pressure plate. The impeller rotates under the drive of the output shaft, causing the lubricating oil at the bottom of the housing to move along the circumferential direction of the oil supply chamber to the oil outlet. The lubricating oil then flows into each bearing boss sequentially through the oil supply holes along the opposite direction of the power transmission of the reducer.

[0008] The oil inlet on the right is higher than the oil inlet on the left, and the oil inlet is higher than the lowest point of the inner circumference of the bearing boss. The inlet of each oil inlet is higher than the outlet.

[0009] The inner diameter of the oil supply chamber is larger than the inner diameter of the output shaft boss; the center of the pressure plate is provided with an inner hole for the output shaft to pass through.

[0010] The impeller includes a disk and several blades; the outer diameter of the disk is larger than the inner diameter of the inner hole, and the outer diameter of the blades is matched with the inner diameter of the oil supply chamber.

[0011] The inner circumferential surface of the output shaft boss is provided with an oil guide groove, and the oil outlet of the pressure plate is connected to the oil inlet of the output shaft boss through the oil guide groove.

[0012] The pressure plate is fixed between the housing and the output shaft flange.

[0013] The oil outlet is located on the upper part of the pressure plate, and the lower part of the pressure plate is also provided with an oil inlet.

[0014] The bearing boss includes an input shaft boss, a first transmission shaft boss, two second transmission shaft bosses, and an output shaft boss arranged sequentially along the power transmission direction of the reducer.

[0015] The oil inlet includes a first oil inlet located between the output shaft boss and the upper second drive shaft boss, a second oil inlet located between the first drive shaft boss and the upper second drive shaft boss, and a third oil inlet located between the input shaft boss and the first drive shaft boss.

[0016] The oil inlet hole is located between the bearing retaining ring and the end cover.

[0017] The beneficial effects of this invention are:

[0018] This invention employs a built-in double impeller for oil supply, with the impeller driven by the reducer's own power. This eliminates the need for external components such as oil pumps, motors, and oil pipes, simplifying the external structure, resulting in a more aesthetically pleasing overall appearance, reduced production and maintenance costs, and reliable and durable operation. Furthermore, the oil supply can be adjusted according to the reducer's speed, achieving self-lubrication of the reducer, ensuring long-term stable and efficient operation, and extending the reducer's service life. Attached Figure Description

[0019] Figure 1 This is a top view of the structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the main structure of the housing, impeller, and pressure plate of the present invention.

[0021] Figure 3 This is a schematic diagram of the main structure of the casing of the present invention.

[0022] Figure 4 This is a top view of the casing structure of the present invention.

[0023] Figure 5 This is a schematic diagram of the main structure of the impeller of the present invention.

[0024] Figure 6 This is a schematic diagram of the main structure of the pressure plate of the present invention. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited to the following embodiments.

[0026] A dual-impeller self-lubricating reducer includes a housing 1, an input shaft 2, an output shaft 3, a transmission mechanism, an oil pumping mechanism, and an oil distribution mechanism.

[0027] The input shaft and output shaft are rotatably positioned on the housing, and the transmission mechanism is used to transmit power between the input shaft and the output shaft. Both sides of the housing are equipped with an oil pumping mechanism and an oil distribution mechanism. Driven by the input shaft, the oil pumping mechanism draws lubricating oil from the bottom of the housing and delivers it to the oil distribution mechanism, which then distributes the lubricating oil to the bearings on both sides of the input shaft and each transmission shaft of the transmission mechanism.

[0028] The reducer is a parallel reducer, with the input shaft, output shaft, and all transmission shafts of the transmission mechanism arranged in parallel. The transmission mechanism employs a three-stage reduction transmission, including a first transmission shaft 9.1 and a second transmission shaft 9.2. Specifically, the transmission between the input shaft and the first transmission shaft is a single stage, the transmission between the first shaft and the two second transmission shafts is a two-stage stage, and the transmission between the two third transmission shafts and the output shaft is a three-stage stage.

[0029] The inner walls on both sides of the housing are provided with multiple bearing bosses, including an input shaft boss 1-1, a first transmission shaft boss 1-2, two second transmission shaft bosses 1-3, and an output shaft boss 1-4. These bearing bosses are arranged sequentially along the power transmission direction of the reducer. Figure 3 (From left to right) and connected as one.

[0030] The input shaft is mounted in the input shaft boss via input shaft bearing 2-1, the output shaft is mounted in the output shaft boss via output shaft bearing 3-1, the first drive shaft is mounted in the first drive shaft boss via first drive shaft bearing 9-11, and the second drive shaft is mounted in the second drive shaft boss via second drive shaft bearing 9-21. The housing is also provided with end caps for sealing each bearing, including an input shaft end cap 2-2 that mates with the input shaft bearing, a first drive shaft end cap 9-12 that mates with the first drive shaft bearing, and a second drive shaft end cap 9-22 that mates with the second drive shaft bearing. Output shaft flanges 3-2 that mate with the output shaft bearings are provided on both sides of the housing.

[0031] The oil pumping mechanism includes a pressure plate 4 and an impeller 5.

[0032] The pressure plate is positioned between the output shaft bearing 3-1 and the output shaft flange 3-2. The two end faces of the pressure plate are fixed to the housing and the output shaft flange, respectively. A certain distance is maintained between the pressure plate and the inner wall of the output shaft flange to form an oil supply chamber A. The impeller is positioned in the oil supply chamber and fixed to the output shaft. The inner diameter of the oil supply chamber is larger than the inner diameter of the output shaft boss.

[0033] The pressure plate has an oil outlet 4.1 at its upper part (the oil outlet is close to the upper second drive shaft boss), an inner hole 4.2 at its center for the output shaft to pass through, and an oil inlet 4.3 at its lower part. The pressure plate has bolt holes 4.4 around its four perimeter for fixing. The inner diameter of the pressure plate's inner hole is smaller than the inner diameter of the output shaft boss, and the distance from the pressure plate's oil outlet to the output shaft's central axis is greater than the inner diameter of the output shaft boss.

[0034] The impeller includes a disk 5.1 and several blades 5.2 disposed on the outer circumference of the disk. The disk also has a keyway 5.3 for connecting to the output shaft. The outer diameter of the disk is larger than the inner diameter of the pressure plate's inner hole. The outer diameter of the blades matches the inner diameter of the oil supply chamber, and the thickness of the impeller matches the thickness of the oil supply chamber. The distances from the oil inlet, oil outlet, blades, and the central axis of the output shaft are matched.

[0035] The lubricating oil level at the bottom of the inner cavity of the housing is higher than the inner hole of the pressure plate. The lubricating oil can enter the oil supply chamber through the inner hole, or it can enter the oil supply chamber through the oil inlet. When the impeller rotates under the drive of the output shaft, the impeller drives the lubricating oil to move along the circumference of the oil supply chamber to the oil outlet.

[0036] The oil distribution mechanism includes several oil supply holes. Figure 3 In the middle, these oil supply holes are along the power transmission direction of the reducer ( Figure 3 These oil supply holes are arranged sequentially from left to right, and also along the direction from bottom to top. Figure 3 The oil inlets are arranged sequentially from bottom to top, with the oil inlet on the right side being higher than that on the left. Each oil inlet is connected to the inner circumferential surface of two adjacent bearing bosses at both ends. Each oil inlet is also arranged at an angle, with the right end of the oil inlet being the inlet and the left end being the outlet. The inlet of the oil inlet is higher than the outlet.

[0037] The oil inlet includes a first oil inlet 6-1, a second oil inlet 6-2, and a third oil inlet 6-3. The first oil inlet is located between the output shaft boss and the upper second transmission shaft boss, the second oil inlet is located between the first transmission shaft boss and the upper second transmission shaft boss, and the third oil inlet is located between the input shaft boss and the first transmission shaft boss.

[0038] The inner circumferential surface of the output shaft boss is provided with an oil guide groove 7. The oil guide groove is parallel to the output shaft. The outer ring of the output shaft bearing blocks the side opening of the oil guide groove. One end of the oil guide groove is connected to the oil outlet of the pressure plate and the other end is connected to the first oil inlet hole.

[0039] The lubricating oil passes through these oil inlets sequentially in the opposite direction of the power transmission of the reducer: after being discharged from the oil outlet of the pressure plate, the lubricating oil first enters the second drive shaft boss located above through the oil guide groove and the first oil inlet, lubricating the second drive shaft bearing 9-21, then enters the first drive shaft boss through the second oil inlet, lubricating the first drive shaft bearing 9-11, and finally enters the input shaft boss, lubricating the input shaft bearing 2-1.

[0040] The opening of each oil inlet is positioned higher than the lowest point of the inner circumference of the bearing boss it connects to. This ensures that a certain amount of lubricating oil can accumulate in the bearing boss to lubricate the bearing. Excess lubricating oil flows into the next oil inlet or returns directly to the bottom of the housing through the bearing.

[0041] like Figure 3 As shown, the outlet of the third oil inlet is higher than the lowest point on the inner circumferential surface of the input shaft boss, the inlet of the third oil inlet and the outlet of the second oil inlet are higher than the lowest point on the inner circumferential surface of the first drive shaft boss, the inlet of the second oil inlet and the outlet of the first oil inlet are higher than the lowest point on the inner circumferential surface of the second drive shaft boss, and the inlet (oil guide groove) of the first oil inlet is higher than the lowest point on the inner circumferential surface of the output shaft boss.

[0042] The oil inlet hole is also located between the bearing retaining ring and the end cover. The third oil inlet hole is located between the input shaft bearing retaining ring and the input shaft end cover, and between the first drive shaft bearing retaining ring and the first drive shaft end cover. The second oil inlet hole is located between the second drive shaft bearing retaining ring and the second drive shaft end cover, and between the first drive shaft bearing retaining ring and the first drive shaft end cover.

[0043] The lower third bearing boss 1-31 and the output shaft boss are immersed in lubricating oil due to their low position, and do not require lubrication through the oil distribution mechanism. Similarly, the gears installed between the input shaft and the first drive shaft, between the first drive shaft and the two second drive shafts, and between the two second drive shafts and the output shaft have large outer diameters and are therefore immersed in lubricating oil, and do not require lubrication through the oil distribution mechanism.

[0044] This embodiment can also be applied to parallel reducers with two-stage, four-stage, and five-stage reduction transmissions, as well as to orthogonal reducers.

[0045] Finally, it should be noted that the above examples are merely specific embodiments of the present invention. Obviously, the present invention is not limited to the above embodiments and many variations are possible. All variations that can be directly derived or conceived by those skilled in the art from the disclosure of this invention should be considered within the scope of protection of this invention.

Claims

1. A double-impeller self-lubricating reducer, comprising a housing (1), an input shaft (2) and an output shaft (3) rotatably positioned on the housing, and a transmission mechanism for transmitting power between the input shaft and the output shaft; bearing bosses are provided on the inner walls of both sides of the housing, including an input shaft boss, an output shaft boss, and a plurality of transmission shaft bosses; characterized in that: The pump oil mechanism and the oil distribution mechanism are arranged on both sides of the casing. The pump oil mechanism comprises a pressure plate (4) and an impeller (5) arranged between the output shaft bearing (3-1) and the output shaft flange (3-2) in sequence, the pressure plate is provided with an oil outlet (4.1), the impeller is fixed with the output shaft, and the oil supply cavity accommodating the impeller is formed between the pressure plate and the output shaft flange. The oil distribution mechanism comprises a plurality of oil inlet holes arranged along the power transmission direction of the speed reducer in sequence, the two ends of the oil inlet hole are communicated with the inner circumferential surfaces of the adjacent bearing bosses respectively, the oil inlet hole of the output shaft boss is also communicated with the oil outlet of the pressure plate, the impeller rotates under the drive of the output shaft to make the lubricating oil at the bottom of the casing move to the oil outlet along the circumferential direction of the oil supply cavity, and the lubricating oil flows into each bearing boss in sequence along the opposite direction of the power transmission of the speed reducer through the oil supply hole; the oil inlet hole on the right side is higher than the oil inlet hole on the left side, the oil inlet hole is higher than the lowest point of the inner circumferential surface of the bearing boss, and the inlet of each oil inlet hole is higher than the outlet. The inner diameter of the oil supply cavity is greater than the inner diameter of the output shaft boss; and the center of the pressure plate is provided with an inner hole (4.2) for the output shaft to pass through. The inner circumferential surface of the output shaft boss is provided with an oil guide groove (7), and the oil outlet of the pressure plate is communicated with the oil inlet hole of the output shaft boss through the oil guide groove. The oil outlet is arranged on the upper part of the pressure plate, and the lower part of the pressure plate is also provided with an oil inlet (4.3). The oil supply hole is also arranged in sequence along the direction from bottom to top. Each oil inlet hole is also arranged obliquely. The lubricating oil accumulated in the bearing boss to a certain height realizes the lubrication of the bearing, and the excess lubricating oil flows into the next oil inlet hole or returns to the bottom of the casing directly through the bearing.

2. The double-impeller self-lubricating speed reducer according to claim 1, characterized in that: The impeller comprises a disc (5.1) and a plurality of paddles (5.2); the outer diameter of the disc is greater than the inner diameter of the inner hole, and the outer diameter of the paddle is suitable for the inner diameter of the oil supply cavity.

3. A double-impeller self-lubricating speed reducer according to claim 2, characterized in that: The pressure plate is fixed between the casing and the output shaft flange.

4. A double-impeller self-lubricating speed reducer according to claim 3, characterized in that: The bearing boss comprises an input shaft boss (1-1), a first transmission shaft boss (1-2), two second transmission shaft bosses (1-3) and an output shaft boss (1-4) arranged along the power transmission direction of the speed reducer in sequence.

5. A double-impeller self-lubricating speed reducer according to claim 4, characterized in that: The oil inlet hole comprises a first oil inlet hole (6-1) arranged between the output shaft boss and the second transmission shaft boss above, a second oil inlet hole (6-2) arranged between the first transmission shaft boss and the second transmission shaft boss above, and a third oil inlet hole (6-3) arranged between the input shaft boss and the first transmission shaft boss.

6. A double-impeller self-lubricating speed reducer according to claim 5, characterized in that: The oil inlet hole is arranged between the retaining ring and the end cover of the bearing.

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