Lightweight K-series speed reducer

Abstract

The invention is suitable for the technical field of transmission devices, and provides a lightweight K-series speed reducer which comprises a gearbox, the gearbox comprises a base and a top cover, a power source is installed on the gearbox, a driving shaft of the power source is connected with a gear set, and the gear set comprises a transmission shaft and a hollow shaft. The hollow shaft is arranged on the corresponding transmission shaft in a sleeving mode and rotationally connected with the corresponding transmission shaft, an oil storage groove is formed in the bottom of the base, the driving shaft is connected with a lubricating system, and the lubricating system extracts oil from the oil storage groove and sprays the oil to the gear set. The device solves the problem that the total weight of a speed reducer is increased due to the fact that the number of gears is increased and the area of a lubricating oil pool is increased during multi-stage transmission, the overall structural size of a gear set is optimized through sleeving connection of the transmission shaft and the hollow shaft, meanwhile, the needed oil storage amount is reduced through cooperation of the oil storage groove and a lubricating system, and therefore light weight and high efficiency are achieved. And the efficiency of the speed reducer is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission devices, and more specifically, to a lightweight K series reducer. Background Art

[0002] K series reducer is a type of reducer that adopts bevel gear (bevel gear) structure, can convert output angle, has the advantages of high precision, high efficiency, low noise, etc., and is widely used in various low-speed, high-torque right-angle transmission environments.

[0003] At present, K series reducers are usually used in heavy industrial equipment. They have large transmission torque. In order to maintain the overall motion performance, it is necessary to ensure the rigidity of each transmission component and the lubrication effect between components. High-strength gears are usually selected, and external lubrication mechanisms are connected or a large oil pool is set in the gearbox. In situations where multi-stage transmission is required, the overall weight of the reducer increases rapidly with the increase in the number of gears and the area of ​​the oil pool, thereby reducing the power density and increasing energy consumption. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a lightweight K series multi-stage transmission reducer.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A lightweight K series reducer, comprising a gearbox, the gearbox comprising a base and a top cover, a power source installed on the gearbox, a gear set connected to a driving shaft of the power source, the gear set installed in the gearbox, the gear set comprising a plurality of transmission shafts and a plurality of hollow shafts, the gears of the gear set being sequentially installed on the transmission shaft and the hollow shaft, one transmission shaft or hollow shaft corresponding to a transmission stage, the hollow shaft being sleeved on the transmission shaft and rotatably connected with the corresponding transmission shaft, that is, all transmission stages are divided into two groups, one group being installed in the gearbox through the transmission shaft, and the other group being installed on the hollow shaft, the transmission stage corresponding to each hollow shaft and the transmission stage corresponding to each transmission shaft are respectively coaxially arranged, the transmission stages are sequentially connected, and the radial arrangement size of the multi-stage transmission gear set structure is reduced by the overlapping design, so that the reducer structure is more compact, thereby reducing the overall weight of the gear set and the size of the required oil pool area, that is, reducing the weight of the oil pool at the same time;

[0007] An oil storage tank is provided at the bottom of the base, and a lubrication system is connected to the drive shaft. The liquid distribution pipe of the lubrication system is provided on the top cover. The lubrication system draws oil from the oil storage tank and sprays it on the gear set through the liquid distribution pipe. The lubrication system connected in parallel to the gear set changes splash lubrication into spray lubrication, thereby reducing the oil storage amount of the oil pool and thus reducing the weight of the oil pool. By optimizing the overall structural dimensions of the gear set and adjusting the lubrication method, lightweight is achieved, the power density of the reducer is improved, and energy consumption is reduced.

[0008] The present invention is further configured as follows: the gear set includes a primary transmission, a secondary transmission and a tertiary transmission, the primary transmission is connected to the drive shaft, the secondary transmission includes a gear shaft 1, the primary transmission is connected to the gear shaft 1, the tertiary transmission includes a gear shaft 2, the secondary transmission is connected to the gear shaft 2, the hollow shaft is rotatably mounted on the gear shaft 1, the hollow shaft is the output side of the tertiary transmission, and the hollow shaft extends out of the gear box;

[0009] Taking the three-stage transmission gear set as an example, the first stage transmission is connected to the power source to achieve steering, the second stage transmission is installed on the transmission shaft, and the third stage transmission is installed on the hollow shaft and coaxially overlapped with the second stage transmission, thereby reducing the radial arrangement size of each transmission stage in multi-stage transmission;

[0010] One end of the hollow shaft in the gear box is the driving end, and the driving end is sleeved on the gear shaft one. A driven gear two is installed on the outer periphery of the driving end, and the driven gear two is meshed with the gear shaft two. The other end of the hollow shaft is the output end, and the output end is the output shaft of the gear set.

[0011] It is further configured as follows: the primary transmission includes a driving bevel gear, the driving bevel gear is installed on the driving shaft, a driven bevel gear is meshed on the driving bevel gear, and the driven bevel gear is installed on gear shaft one; the secondary transmission includes a driven gear one, the driven gear one is installed on gear shaft two, and the driven gear one is meshed with gear shaft one.

[0012] The present invention is further configured as follows: the bottom of the inner wall of the base is inclined, the oil storage tank is arranged at the lowest point inside the base, and the lubricating oil falling on the bottom can enter the oil storage tank along the bottom plate of the base for temporary storage;

[0013] It is further configured that: the lubrication system includes a pumping assembly, a cavity is opened in the base, an oil suction pipe and an oil outlet pipe are connected to the cavity, the oil suction pipe is connected to the oil storage tank, the pumping assembly sucks oil through the oil suction pipe and discharges oil through the oil outlet pipe;

[0014] The base is provided with a positioning column, and a plug hole is correspondingly opened on the top cover. The positioning column is sealed and connected with the plug hole. The opening of the oil outlet pipe is provided on the positioning column, and the plug hole is connected with the liquid distribution pipe. The liquid distribution pipe is fitted and fixed on the top of the top cover. The liquid distribution pipe is arranged above each transmission stage, and a plurality of spray holes are opened on the liquid distribution pipe.

[0015] When the pumping assembly runs with the power source, the lubricating oil in the oil storage tank is sucked into the cavity through the oil suction pipe and squeezed out from the oil outlet pipe, thereby lubricating the gears of each transmission stage through the liquid distribution pipe and its spray hole on the top. Finally, the lubricating oil that slides down from the gears or the inner wall of the gear box enters the oil storage tank for temporary storage. The oil storage tank cooperates with the lubrication system to change splash lubrication to spray lubrication, thereby reducing the required oil storage volume and reducing the overall quality.

[0016] The present invention is further configured as follows: the pumping assembly includes a driving gear and a driven gear three, the driving gear is installed on the driving shaft, the driven gear three is rotatably installed on the base, the driving gear is meshed with the driven gear three, an impeller is installed on the driven gear three, and the impeller is in the cavity.

[0017] The present invention is further configured as follows: the driven gear 1 and the driven gear 2 are weight-reducing gears, and the pumping components are all injection-molded parts, so as to control the weight of each structure of the reducer itself, thereby promoting lightweighting.

[0018] The advantages of the present invention are:

[0019] 1. The transmission stages of the gear set are divided into two groups, one group is installed on the transmission shaft, and the other group is installed on the hollow shaft. One end of the hollow shaft is rotatably sleeved on the transmission shaft, and the other end is rotatably installed on the gear box. The transmission stages are connected in sequence, that is, the two groups of transmission structures are overlapped with each other, thereby reducing the radial arrangement size of the multi-stage gear transmission structure, making full use of the space, making the gear set structure more compact, reducing the overall weight of the gear set, and reducing the size of the required oil pool area, reducing the total weight of the required storage lubricant, and promoting lightweight;

[0020] 2. The bottom of the base is set to an inclined shape, and an oil storage tank is set at the lowest point. A pumping assembly connected in parallel with the gear set is installed on the drive shaft. The pumping assembly draws oil from the oil storage tank and transports the oil into the liquid distribution pipe above. The oil is sprayed downward on each gear through the spray hole, changing splash lubrication to spray lubrication, reducing the weight of the required stored lubricating oil, thereby reducing the weight of the oil pool and promoting lightweighting. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the gear set structure of the present invention;

[0024] Figure 4 For along Figure 1 The AA line section is shown;

[0025] Figure 5 For along Figure 2 The BB line cross-section is shown;

[0026] Figure 6 for Figure 4 An enlarged view of part D is shown;

[0027] Figure 7 for Figure 5 An enlarged view of part E is shown;

[0028] Figure 8 for Figure 2 An enlarged view of section C is shown;

[0029] Fig. 9 It is a schematic diagram of the top cover structure of the present invention;

[0030] Fig.10 for Fig. 9 Bottom view shown;

[0031] In the figure: 1. power source; 11. driving shaft; 2. gear set; 21. primary transmission; 211. driving bevel gear; 212. driven bevel gear; 22. secondary transmission; 221. gear shaft one; 222. driven gear one; 23. tertiary transmission; 231. gear shaft two; 232. driven gear two; 233. hollow shaft; 2331. driving end; 2332. output end; 3. base; 31. oil storage tank; 4. top cover; 41. plug-in hole; 5. lubrication system; 51. cavity; 52. oil suction pipe; 53. oil outlet pipe; 54. pumping assembly; 541. driving gear; 542. driven gear three; 543. impeller; 55. positioning column; 56. liquid distribution pipe; 561. spray hole. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] See also Figure 1-10 , the present invention provides the following technical solutions:

[0034] A lightweight K series reducer comprises a gearbox, the gearbox comprises a base 3 and a top cover 4, a power source 1 is mounted on the gearbox, a driving shaft 11 of the power source 1 is connected with a gear set 2, the gear set 2 is mounted in the gearbox, the gear set 2 comprises a plurality of transmission shafts and a plurality of hollow shafts 233, each gear of the gear set 2 is sequentially mounted on the transmission shaft and the hollow shaft 233, one transmission shaft or hollow shaft 233 corresponds to one transmission stage, each transmission stage is sequentially connected, each transmission stage of the gear set 2 is divided into two groups by the transmission shaft and the hollow shaft 233, the hollow shaft 233 is sleeved on the transmission shaft and is rotatably connected with the corresponding transmission shaft, that is, the two groups of transmission stages are coaxially overlapped and used, the axial space of the reducer is fully utilized, the radial space size is reduced, the structure is compact, the total weight of the parts of each transmission stage is reduced, and the area of ​​the oil pool is reduced, thereby promoting the overall lightweight of the reducer;

[0035] An oil storage tank 31 is provided at the bottom of the base 3, and a lubrication system 5 is connected to the drive shaft 11. A liquid distribution pipe 56 of the lubrication system 5 is provided on the top cover 4. The lubrication system 5 draws oil from the oil storage tank 31 and sprays it on the gear set 2 through the liquid distribution pipe 56. The lubrication system 5 is connected in parallel with the gear set 2, and lubrication can be turned on while the reducer is running, changing the splash lubrication of the oil pool to spray lubrication, reducing the amount of oil required to be stored, thereby reducing the overall weight of the reducer.

[0036] In this embodiment, taking a three-stage transmission gear set structure as an example, the gear set 2 includes a primary transmission 21, a secondary transmission 22 and a tertiary transmission 23;

[0037] The primary transmission 21 includes a driving bevel gear 211, which is mounted on the driving shaft 11, and a driven bevel gear 212 is meshed with the driving bevel gear 211;

[0038] The secondary transmission 22 includes a gear shaft 221, which is a transmission shaft with gears. The integrated structure reduces the use of assembly parts and reduces the total weight. One end of the gear shaft 221 is rotatably mounted on the gear box, and the driven bevel gear 212 is mounted on the gear shaft 221, so that the primary transmission 21 is connected to the secondary transmission 22. The pitch circle diameter of the driven bevel gear 212 is set to be larger than the pitch circle diameter of the gear of the gear shaft 221 itself, and the gear of the gear shaft 221 itself is arranged relative to the driving bevel gear 221, which can make full use of the axial space and ensure a compact structure. The gear shaft 221 is meshed with a driven gear 222;

[0039] The three-stage transmission 23 includes a second gear shaft 231, and a driven gear 1 222 is installed on the second gear shaft 231, so that the secondary transmission 22 is connected to the three-stage transmission 23, and both ends of the second gear shaft 231 are rotatably connected to the gear box, and the second gear shaft 231 is meshed with a second driven gear 232, and the second driven gear 232 is installed on a hollow shaft 233, and one end of the hollow shaft 233 on which the driven gear 232 is installed is a driving end 2331, and the driving end 2331 is sleeved on the first gear shaft 221, and a plurality of bearings are installed between the inner wall of the driving end 2331 and the first gear shaft 221, and the other end of the hollow shaft 233 is rotatably installed on the gear box, which is an output end 2332, and the output end 2332 extends out of the gear box, that is, the output shaft of the reducer;

[0040] When the reducer is running, the power source 1 drives the gear shaft 1 221 of the secondary transmission 22 to rotate through the active bevel gear 221, thereby driving the gear shaft 2 231 of the tertiary transmission 23 to rotate through the driven gear 1 222, and the gear shaft 2 231 drives the hollow shaft 233 to rotate through the driven gear 2 232, and the hollow shaft 233 and the gear shaft 1 221 are movably connected through the bearing, and the two complement each other when rotating, thereby realizing the superposition of different transmission levels, making the overall axial structure of the gear set 2 more compact, reducing the size of the radial dimension by optimizing the structure, thereby reducing the overall weight and promoting lightweight.

[0041] In the four-stage transmission, the four-stage transmission can be set as a hollow shaft 233 structure, and the hollow shaft 233 of the four-stage transmission can be rotatably installed on the transmission shaft of the two-stage transmission or the three-stage transmission to achieve one-time overlap;

[0042] In the five-stage transmission, the fourth-stage transmission and the fifth-stage transmission can be set as hollow shaft structures, and connected to the transmission shafts of the second-stage transmission and the third-stage transmission in sequence, and so on. The arrangement optimization of the multi-stage transmission gear structure can be achieved and the overall size of the reducer can be reduced.

[0043] In one embodiment, the bottom of the inner wall of the base 3 is inclined, and the oil storage tank 31 is arranged at the lowest point inside the base 3, so that the oil in the base 3 can slide along the bottom and be temporarily stored in the oil storage tank 31;

[0044] The lubrication system 5 includes a pumping assembly 54. A cavity 51 is provided in the base 3. An oil suction pipe 52 and an oil outlet pipe 53 are connected to the cavity 51. The oil suction pipe 52 is connected to the oil storage tank 31. A positioning column 55 is provided on the base 3. A plug hole 41 is correspondingly provided on the top cover 4. The positioning column 55 is sealedly connected to the plug hole 41. The opening of the oil outlet pipe 53 is provided on the positioning column 55. The plug hole 41 is connected to the liquid distribution pipe 56. When the top cover 4 is installed on the base 3, the oil outlet pipe 53 is sealedly connected to the liquid distribution pipe 56. The pumping assembly 54 absorbs oil through the oil suction pipe 52 and discharges oil through the oil outlet pipe 53. Finally, the lubricating oil is sprayed by the liquid distribution pipe 56.

[0045] The liquid distribution pipe 56 is fitted and fixed on the top of the top cover 4 . The liquid distribution pipe 56 is arranged above each transmission stage. A plurality of spray holes 561 are opened on the liquid distribution pipe 56 .

[0046] The pumping assembly 54 includes a driving gear 541 and a driven gear 542. The driving gear 541 is installed on the driving shaft 11, and the driven gear 542 is rotatably installed on the base 3. The driving gear 541 is meshed with the driven gear 542. The driven gear 542 is installed with an impeller 543, and the impeller 543 is in the cavity 51.

[0047] Furthermore, driven gear 1 222 and driven gear 2 232 are weight-reducing gears, and pumping components 54 are all injection-molded parts, which further promotes lightweighting by reducing the weight of each part.

[0048] In summary, the advantages of the present invention are:

[0049] The transmission stages of the gear set 2 are divided into two groups, one group is mounted on the transmission shaft, and the other group is mounted on the hollow shaft 233. One end of the hollow shaft 233 is rotatably sleeved on the transmission shaft, and the other end is rotatably mounted on the gear box. The transmission stages are connected in sequence, that is, the two groups of transmission structures are overlapped with each other, thereby reducing the radial arrangement size of the multi-stage gear transmission structure, making full use of the space, making the gear set 2 more compact, reducing the overall weight of the gear set 2, and reducing the size of the required oil pool area, reducing the total weight of the required storage lubricating oil, and promoting lightweighting;

[0050] The bottom of the base 3 is arranged in an inclined shape, and an oil storage tank 31 is arranged at the lowest point. A pumping assembly 54 connected in parallel with the gear set 2 is installed on the driving shaft 11. The pumping assembly 54 draws oil from the oil storage tank 31 and transports the oil into the liquid distribution pipe 56 above, and sprays the oil downward on each gear through the spray hole 561, changing the splash lubrication into spray lubrication, reducing the weight of the required stored lubricating oil, thereby reducing the weight of the oil pool and promoting lightweight.

[0051] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0052] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

Claims

1. A lightweight K series reducer, comprising a gear box, wherein the gear box comprises a base (3) and a top cover (4), Features: A power source (1) is mounted on the gear box. A gear set (2) is connected to a drive shaft (11) of the power source (1). The gear set (2) is mounted in the gear box. The gear set (2) comprises a plurality of transmission shafts and a plurality of hollow shafts (233). The gears of the gear set (2) are mounted on the transmission shaft and the hollow shaft (233) in sequence. One transmission shaft or hollow shaft (233) corresponds to one transmission stage. The hollow shaft (233) is sleeved on the transmission shaft and is rotatably connected to the corresponding transmission shaft. The transmission stages are connected in sequence. An oil storage tank (31) is arranged at the bottom of the base (3). A lubrication system (5) is connected to the drive shaft (11). A liquid distribution pipe (56) of the lubrication system (5) is arranged on the top cover (4). The lubrication system (5) extracts oil from the oil storage tank (31) and sprays the oil onto the gear set (2) through the liquid distribution pipe (56).

2. A lightweight K series reducer according to claim 1, Features: The gear set (2) comprises a primary transmission (21), a secondary transmission (22) and a tertiary transmission (23); the primary transmission (21) is connected to the drive shaft (11); the secondary transmission (22) comprises a first gear shaft (221); the primary transmission (21) is connected to the first gear shaft (221); the tertiary transmission (23) comprises a second gear shaft (231); the second gear shaft (22) is connected to the second gear shaft (231); the hollow shaft (233) is rotatably mounted on the first gear shaft (221); the hollow shaft (233) is an output side of the tertiary transmission (23); and the hollow shaft (233) extends out of the gear box.

3. A lightweight K series reducer according to claim 2, Features: One end of the hollow shaft (233) in the gear box is a driving end (2331), and the driving end (2331) is mounted on the first gear shaft (221). A second driven gear (232) is mounted on the outer periphery of the driving end (2331), and the second driven gear (232) is meshed with the second gear shaft (231). The other end of the hollow shaft (233) is an output end (2332), and the output end (2332) is an output shaft of the gear set (2).

4. A lightweight K series reducer according to claim 2, Features: The primary transmission (21) comprises a driving bevel gear (211), the driving bevel gear (211) being mounted on a driving shaft (11), a driven bevel gear (212) being meshed with the driving bevel gear (211), the driven bevel gear (212) being mounted on a first gear shaft (221), the secondary transmission (22) comprising a first driven gear (222), the first driven gear (222) being mounted on a second gear shaft (231), the first driven gear (222) being meshed with the first gear shaft (221), and the first driven gear (222) and the second driven gear (232) being weight-reducing gears.

5. A lightweight K series reducer according to claim 1, Features: The bottom of the inner wall of the base (3) is inclined, and the oil storage tank (31) is arranged at the lowest point inside the base (3).

6. A lightweight K series reducer according to claim 1, Features: The lubrication system (5) comprises a pumping assembly (54). A cavity (51) is provided in the base (3). An oil suction pipe (52) and an oil outlet pipe (53) are connected to the cavity (51). The oil suction pipe (52) is connected to the oil storage tank (31). The pumping assembly (54) sucks oil through the oil suction pipe (52) and discharges oil through the oil outlet pipe (53).

7. A lightweight K series reducer according to claim 6, Features: The base (3) is provided with a positioning column (55), and the top cover (4) is correspondingly provided with a plug hole (41). The positioning column (55) is sealedly connected to the plug hole (41), and the opening of the oil outlet pipe (53) is provided on the positioning column (55), and the plug hole (41) is connected to the liquid distribution pipe (56).

8. A lightweight K series reducer according to claim 7, Features: The liquid distribution pipe (56) is fitted and fixed on the top of the top cover (4); the liquid distribution pipe (56) is arranged above each transmission stage; and a plurality of spray holes (561) are provided on the liquid distribution pipe (56).

9. A lightweight K series reducer according to claim 6, Features: The pumping assembly (54) comprises a driving gear (541) and a driven gear three (542); the driving gear (541) is mounted on the driving shaft (11); the driven gear three (542) is rotatably mounted on the base (3); the driving gear (541) is meshed with the driven gear three (542); an impeller (543) is mounted on the driven gear three (542); the impeller (543) is in the cavity (51); and the pumping assembly (54) is an injection molded part.

Images