A vertical planetary gearbox lubrication structure

Abstract

The invention discloses a lubrication structure of a vertical planetary gearbox, comprising: an upper housing; an input shaft, which is arranged on the upper housing and vertically arranged; a sun gear, which is connected to the bottom end of the input shaft, a connecting hole is arranged at the bottom end of the input shaft, an inner tooth is arranged on the hole wall of the connecting hole, and the sun gear meshes with the inner tooth; and a baffle, which is arranged around the outer periphery of the input shaft and arranged above the connecting hole; wherein a first oil passage penetrating the inner wall and the outer wall of the upper housing is arranged on the upper housing, and the height of the first oil passage is higher than the height of the baffle, so that the first oil passage sprays lubricating oil onto the baffle; a second oil passage penetrating the outer wall of the input shaft and the connecting hole is arranged on the input shaft, and the height of the oil inlet of the second oil passage is higher than the height of the inner ring of the baffle, so that the lubricating oil on the baffle flows from the second oil passage into the connecting hole to lubricate the meshing part of the sun gear and the inner tooth. The invention provides a lubrication structure that can effectively lubricate the meshing part of the input shaft and the sun gear of a vertical planetary gearbox.

Description

Technical Field

[0001] The invention relates to the technical field of gear boxes, and in particular to a lubrication structure of a vertical planetary gear box. Background Art

[0002] Planetary gear transmission is widely used in various industries due to its advantages of light weight, small size, large transmission ratio and high efficiency. A simple planetary gear mechanism includes a sun gear, several planetary gears and an inner ring gear. One end of the sun gear is connected to the input shaft and the other end is meshed with the planetary gear. One end of the planetary gear is connected to the output shaft, forming a planetary reduction structure from the input shaft to the output shaft. Planetary gearboxes can be divided into horizontal and vertical types according to their installation form. In vertical planetary gearboxes, the input shaft and the output shaft are both set vertically. Generally, the input shaft and the sun gear are meshed through drum teeth, and the lubrication of the drum teeth meshing with the input shaft and the sun gear has always been an unresolved problem. The most commonly used method is to apply butter on the drum teeth before installation and lubricate them with grease. However, with this method, the butter on the drum teeth will slowly consume as the gearbox runs, and the lubrication effect is not ideal.

[0003] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0004] The object of the present invention is to provide a vertical planetary gearbox lubrication structure to solve the problem of poor lubrication effect of the drum-shaped teeth meshing between the input shaft and the sun gear of the vertical planetary gearbox in the prior art.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A vertical planetary gearbox lubrication structure, comprising:

[0007] upper box;

[0008] An input shaft is disposed on the upper box body and is vertically arranged;

[0009] a sun gear connected to the bottom end of the input shaft, wherein the bottom end of the input shaft is provided with a connecting hole, a hole wall of the connecting hole is provided with internal teeth, and the sun gear meshes with the internal teeth; and

[0010] A baffle, arranged around the outer circumference of the input shaft and above the connecting hole;

[0011] The upper box body is provided with a first oil passage penetrating the inner wall and the outer wall of the upper box body, and the height of the first oil passage is higher than the height of the baffle plate, so that the first oil passage sprays the lubricating oil onto the baffle plate;

[0012] The input shaft is provided with a second oil circuit which passes through the outer wall of the input shaft and the connecting hole. The height of the oil inlet of the second oil circuit is higher than the height of the inner ring of the baffle plate, so that the lubricating oil on the baffle plate flows from the second oil circuit into the connecting hole to lubricate the meshing portion between the sun gear and the internal gear.

[0013] Optionally, the outer ring of the baffle is tilted upward so that the baffle has a certain accommodating depth for accommodating lubricating oil.

[0014] Optionally, the inner ring of the baffle is fixedly connected to the input shaft, and a step surface for mounting the baffle is provided on the input shaft, and the inner ring of the baffle abuts against the step surface.

[0015] Optionally, the input shaft is supported on the upper housing through a first bearing, the first oil circuit is arranged below the first bearing, and a third oil circuit is arranged on the upper housing above the first bearing, which runs through the inner wall and outer wall of the upper housing, so that the lubricating oil flows from the third oil circuit to the first bearing.

[0016] Optionally, the vertical planetary gearbox lubrication structure further includes:

[0017] A planetary carrier, the top end of which is supported by a second bearing on the bottom end of the upper housing, and a branch is provided on the upper housing, the branch extending from the first oil circuit to the second bearing so that the lubricating oil in the first oil circuit flows to the second bearing through the branch.

[0018] Optionally, there is a gap between the outer ring of the baffle and the upper housing, so that the lubricating oil sprayed from the first oil passage flows from the gap to the second bearing.

[0019] Optionally, the inner teeth are drum-shaped teeth.

[0020] Optionally, the second oil circuit includes:

[0021] An inclined oil passage extending inwardly and obliquely downwardly from an outer wall of the input shaft;

[0022] A vertical oil passage extends vertically upward from the top of the connecting hole and is communicated with the inclined oil passage.

[0023] Optionally, the first bearing includes an upper bearing and a lower bearing, and the upper bearing and the lower bearing are arranged in the upper housing at intervals in the vertical direction, the first oil circuit is arranged below the lower bearing, and the third oil circuit is arranged above the upper bearing.

[0024] Optionally, the vertical planetary gearbox lubrication structure further includes:

[0025] The lower box is arranged below the upper box, the planetary carrier is provided with planetary gears and an inner gear ring meshing with the outer circumference of the planetary gears, the upper box is connected to the top end of the inner gear ring, and the lower box is connected to the bottom end of the inner gear ring;

[0026] The output shaft is arranged at the bottom end of the planetary carrier and can rotate with the planetary carrier to output torque. The output shaft is supported on the lower box body through a third bearing.

[0027] The beneficial effects of the present invention are as follows: a baffle is arranged on the periphery of the input shaft, and a first oil circuit penetrating the inner wall and the outer wall of the upper box body is arranged on the upper box body, so that the lubricating oil in the first oil circuit can be sprayed onto the baffle, and a second oil circuit that can reach the inner tooth meshing position of the sun gear and the input shaft is arranged on the input shaft, and the height of the oil inlet of the second oil circuit is higher than the height of one end of the baffle plate connected to the input shaft, so that the lubricating oil on the baffle plate can pass from the second oil circuit to the inner tooth meshing position of the sun gear and the input shaft for lubrication, thereby ensuring sufficient lubrication of the inner tooth meshing position of the sun gear and the input shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 2 is a schematic structural diagram of a vertical planetary gearbox lubrication structure according to an embodiment of the present invention;

[0029] Figure 2 The present invention Figure 1 A partial enlarged view of

[0030] Figure 3 It is a structural schematic diagram of an upper box body in an embodiment of the present invention;

[0031] Figure 4 is a schematic structural diagram of an input shaft in an embodiment of the present invention;

[0032] Figure 5 The present invention Figure 4 Schematic diagram of the structure viewed from above;

[0033] Figure 6 is a schematic diagram of the cross-sectional structure of a baffle in an embodiment of the present invention;

[0034] Figure 7 2 is a schematic diagram of the top view of the baffle in an embodiment of the present invention.

[0035] In the figure:

[0036] 10. upper housing; 20. input shaft; 30. sun gear; 40. baffle; 50. first bearing; 60. second bearing; 70. planet carrier; 80. lower housing; 90. output shaft;

[0037] 11. First oil circuit; 12. Third oil circuit; 13. Branch circuit; 21. Connecting hole; 22. Second oil circuit; 23. First mounting hole; 24. Bearing seat; 41. Second mounting hole; 71. Planetary gear; 72. Internal gear ring; 73. Pin; 91. Third bearing;

[0038] 221. Inclined oil circuit; 222. Vertical oil circuit; 241. Step surface. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0040] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0042] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0043] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0044] The present invention provides a vertical planetary gearbox lubrication structure. Figure 1 is a structural schematic diagram of a vertical planetary gearbox lubrication structure in an embodiment of the present invention, Figure 2 The present invention Figure 1 For a partial enlarged view, please refer to Figure 1 and Figure 2 The vertical planetary gearbox lubrication structure includes an upper housing 10, an input shaft 20, a sun gear 30 and a baffle 40. The input shaft 20 is arranged on the upper housing 10 and is arranged vertically. The sun gear 30 is connected to the bottom end of the input shaft 20. The bottom end of the input shaft 20 is provided with a connecting hole 21. The connecting hole 21 is a blind hole extending upward from the bottom end surface of the input shaft 20 and is used to connect the sun gear 30. The hole wall of the connecting hole 21 is provided with internal teeth. The sun gear 30 is provided with external teeth. The external teeth of the sun gear 30 mesh with the internal teeth in the connecting hole 21 of the input shaft 20. It can be understood that the sun gear 30 is also arranged vertically. The baffle 40 is annular and is arranged around the outer periphery of the input shaft 20. The baffle 40 is arranged above the connecting hole 21. The baffle 40 is arranged above the connecting hole 21, which means that the height of the baffle 40 in the vertical direction is higher than the height of the connecting hole 21, so that it is convenient for the lubricating oil in the baffle 40 to flow into the connecting hole 21 later.

[0045] like Figure 2 As shown, the upper box body 10 is provided with a first oil passage 11 that penetrates the inner wall and the outer wall of the upper box body 10, and the height of the first oil passage 11 is higher than the height of the baffle 40, so that the first oil passage 11 sprays the lubricating oil onto the baffle 40. The first oil passage 11 can be arranged horizontally or at a certain inclination angle, which is not limited here, as long as the lubricating oil can be led from the outer side of the upper box body 10 to the inner side and sprayed onto the baffle 40. Figure 3 is a schematic diagram of the structure of the upper box body in an embodiment of the present invention, Figure 3 It can be seen that the first oil passage 11 passes through the inner wall and the outer wall of the upper housing 10 .

[0046] Please continue to refer to Figure 2 The input shaft 20 is provided with a second oil circuit 22 that penetrates the outer wall of the input shaft 20 and the connecting hole 21. The height of the oil inlet of the second oil circuit 22 is higher than the height of the inner circle of the baffle 40. The oil inlet of the second oil circuit 22 is the oil port of the second oil circuit 22 on the outer wall of the input shaft 20, and the second oil circuit 22 is inclined inward, and its lowest point is lower than the outer circle of the baffle 40. An annular groove can be processed at the oil inlet of the second oil circuit 22 to facilitate the inflow of lubricating oil. The lubricating oil on the baffle 40 can flow from the second oil circuit 22 into the connecting hole 21 to lubricate the meshing portion of the inner teeth of the sun gear 30 and the input shaft 20. Generally, the inner teeth of the input shaft 20 are drum teeth, that is, the input shaft 20 and the sun gear 30 are meshed through the drum teeth. The lubrication structure of the vertical planetary gearbox of the present invention can better lubricate this drum tooth meshing portion. Figure 4is a schematic diagram of the structure of the input shaft in an embodiment of the present invention, Figure 4 It can be seen that the second oil passage 22 penetrates the outer wall of the input shaft 20 and the connecting hole 21 .

[0047] Figure 5 The present invention Figure 4 Please refer to the schematic diagram of the structure viewed from above. Figure 1 , Figure 4 and Figure 5 The input shaft 20 is provided with a first mounting hole 23 for mounting the baffle 40. The first mounting hole 23 is provided at the bottom of the bearing seat 24 on the input shaft 20 and extends upward from the bottom of the bearing seat 24. Figure 6 is a schematic diagram of the cross-sectional structure of the baffle in an embodiment of the present invention, Figure 7 is a schematic diagram of a top view of the baffle in an embodiment of the present invention, such as Figure 6 and Figure 7 As shown, the mounting baffle 40 is provided with a second mounting hole 41 that matches the first mounting hole 23. The second mounting hole 41 is provided at the inner ring of the baffle 40. The inner ring of the baffle 40 is fixedly connected to the input shaft 20. The baffle 40 can be locked to the bottom of the bearing seat 24 of the input shaft 20 by inserting screws into the second mounting hole 41 and the first mounting hole 23 and tightening them. Figure 4 As shown, the input shaft 20 is also provided with a step surface 241 for installing the baffle 40, the step surface 241 is provided at the bottom of the bearing seat 24, the inner ring of the baffle 40 abuts against the step surface 241, and the baffle 40 cooperates with the step surface 241, which is convenient for positioning when installing the baffle 40. In addition, the height of the step surface 241 is substantially the same as the thickness of the baffle 40, so that after the baffle 40 cooperates with the step surface 241, the bottom end of the baffle 40 is substantially flush with the bottom end surface of the bearing seat 24, making the overall appearance more beautiful and neat.

[0048] Please refer to Figure 6 The outer ring of the baffle 40 is tilted upward so that the baffle 40 has a certain depth for accommodating lubricating oil. Figure 2 As shown, the outer ring of the baffle 40 is tilted upward. After the baffle 40 is assembled on the input shaft 20, a receiving groove is formed between the baffle 40 and the outer wall of the input shaft 20, which can accommodate the lubricating oil sprayed from the first oil circuit 11, and then the lubricating oil on the baffle 40 flows from the second oil circuit 22 to the connecting hole 21 and flows to the meshing position of the input shaft 20 and the sun gear 30.

[0049] Please refer to Figure 2, the input shaft 20 is supported on the upper housing 10 through the first bearing 50, the first oil circuit 11 is arranged below the first bearing 50, and the upper housing 10 is provided with a third oil circuit 12 which runs through the inner wall and the outer wall of the upper housing 10 above the first bearing 50, so that the lubricating oil flows from the third oil circuit 12 to the first bearing 50. The lubricating oil entering the inner cavity of the bearing seat of the upper housing 10 from the third oil circuit 12 flows from the top of the first bearing 50 to the first bearing 50, flows downward from the roller gap of the first bearing 50, and then falls on the baffle 40, and then flows into the connecting hole 21 through the second oil circuit 22, and lubricates the drum-shaped tooth meshing part where the input shaft 20 meshes with the sun gear 30. In other words, the lubricating oil entering from the third oil circuit 12 and the first oil circuit 11 can lubricate the drum-shaped tooth meshing part where the input shaft 20 meshes with the sun gear 30, so that the lubrication effect of the meshing part where the input shaft 20 meshes with the sun gear 30 is better.

[0050] Please continue to refer to Figure 2 The first bearing 50 includes two bearings, namely an upper bearing and a lower bearing. The upper bearing and the lower bearing are arranged in the upper box body 10 at intervals in the vertical direction. The first oil circuit 11 is arranged below the lower bearing, and the third oil circuit 12 is arranged above the upper bearing, so that the lubricating oil in the third oil circuit 12 flows into the inner cavity of the bearing seat of the upper box body 10, and then can flow downward through the upper bearing and the lower bearing to lubricate the upper bearing and the lower bearing.

[0051] Please refer to Figure 1 The vertical planetary gearbox lubrication structure further includes a planet carrier 70, which is vertically arranged, and the top of the planet carrier 70 is supported on the bottom of the upper housing 10 through the second bearing 60. Please refer to Figure 2 A branch 13 is provided on the upper housing 10 , and the branch 13 extends from the first oil passage 11 to the second bearing 60 , so that the lubricating oil in the first oil passage 11 flows to the second bearing 60 through the branch 13 .

[0052] Also, please refer to Figure 2 There is a gap between the outer ring of the baffle 40 and the upper housing 10, so that the lubricating oil sprayed from the first oil circuit 11 flows from the gap to the second bearing 60. That is to say, a part of the lubricating oil sprayed from the first oil circuit 11 to the baffle 40 flows from the gap between the baffle 40 and the upper housing 10 to the second bearing 60, thereby lubricating the second bearing 60.

[0053] Please refer to Figure 4The second oil circuit 22 includes an inclined oil circuit 221 and a vertical oil circuit 222. The inclined oil circuit 221 extends inward and obliquely downward from the outer wall of the input shaft 20. The vertical oil circuit 222 extends vertically upward from the top of the connecting hole 21 and communicates with the inclined oil circuit 221, so that the entire second oil circuit 22 passes through the outer wall of the input shaft 20 and the connecting hole 21, and lubricating oil is introduced from the outside of the input shaft 20 into the connecting hole 21 to lubricate the meshing portion of the input shaft 20 and the sun gear 30 in the connecting hole 21. The second oil circuit 22 is divided into two sections of the inclined oil circuit 221 and the vertical oil circuit 222, which facilitates the processing of the second oil circuit 22. It only needs to drill a hole inward from the outer wall of the input shaft 20 to form the inclined oil circuit 221, and drill a hole upward from the top of the connecting hole 21 to form the vertical oil circuit 222.

[0054] Please refer to Figure 1 The vertical planetary gearbox lubrication structure also includes a lower box body 80, which is arranged below the upper box body 10. The planetary carrier 70 is provided with a planetary gear 71 and an inner gear ring 72 meshing with the outer periphery of the planetary gear 71. The planetary gear 71 is connected to the planetary carrier 70 through a pin shaft 73. The sun gear 30 penetrates into the planetary carrier 70 and meshes with the inner ring of the planetary gear 71. The outer ring of the planetary gear 71 meshes with the inner gear ring 72. The upper box body 10 and the lower box body 80 are connected through the inner gear ring 72. The upper box body 10 is connected to the top end of the inner gear ring 72, and the lower box body 80 is connected to the bottom end of the inner gear ring 72.

[0055] Please refer to Figure 1 The vertical planetary gearbox lubrication structure also includes an output shaft 90, which is arranged at the bottom end of the planet carrier 70 and is designed as an integral part of the planet carrier 70, so that the output shaft 90 becomes a part of the planet carrier 70, and the output shaft 90 can rotate with the planet carrier 70 to output torque, and the input shaft 20 transmits the torque to the sun gear 30, and the sun gear 30 drives the planetary gear 71 on the planet carrier 70, thereby driving the entire planet carrier 70 to rotate, and the planet carrier 70 drives the output shaft 90 to rotate, so that the output shaft 90 transmits the torque. The output shaft 90 is supported on the lower box body 80 through the third bearing 91.

[0056] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A vertical planetary gearbox lubrication structure, characterized in that: include: Upper box(10); An input shaft (20) is disposed on the upper housing (10) and is arranged vertically; a sun gear (30) connected to the bottom end of the input shaft (20); a connecting hole (21) is provided at the bottom end of the input shaft (20); an inner tooth is provided on the hole wall of the connecting hole (21); and the sun gear (30) meshes with the inner tooth; and A baffle (40) is arranged around the outer circumference of the input shaft (20) and is arranged above the connecting hole (21); The upper box body (10) is provided with a first oil passage (11) penetrating the inner wall and the outer wall of the upper box body (10); the height of the first oil passage (11) is higher than the height of the baffle (40), so that the first oil passage (11) sprays lubricating oil onto the baffle (40); The input shaft (20) is provided with a second oil passage (22) penetrating the outer wall of the input shaft (20) and the connecting hole (21); the height of the oil inlet of the second oil passage (22) is higher than the height of the inner ring of the baffle (40), so that the lubricating oil on the baffle (40) flows from the second oil passage (22) into the connecting hole (21) to lubricate the meshing portion of the sun gear (30) and the internal teeth.

2. The vertical planetary gearbox lubrication structure according to claim 1 is characterized in that: The outer ring of the baffle (40) is tilted upwards so that the baffle (40) has a certain accommodating depth for accommodating lubricating oil.

3. The vertical planetary gearbox lubrication structure according to claim 2 is characterized in that: The inner ring of the baffle plate (40) is fixedly connected to the input shaft (20); a step surface (241) for mounting the baffle plate (40) is provided on the input shaft (20); and the inner ring of the baffle plate (40) abuts against the step surface (241).

4. The vertical planetary gearbox lubrication structure according to claim 1, characterized in that: The input shaft (20) is supported on the upper housing (10) via a first bearing (50); the first oil passage (11) is arranged below the first bearing (50); and a third oil passage (12) penetrating the inner wall and the outer wall of the upper housing (10) is arranged on the upper housing (10) above the first bearing (50) so that lubricating oil flows from the third oil passage (12) to the first bearing (50).

5. The vertical planetary gearbox lubrication structure according to claim 4, characterized in that: Also includes: A planet carrier (70), the top end of the planet carrier (70) is supported on the bottom end of the upper housing (10) through a second bearing (60), and a branch (13) is provided on the upper housing (10), and the branch (13) extends from the first oil circuit (11) to the second bearing (60), so that the lubricating oil in the first oil circuit (11) flows to the second bearing (60) through the branch (13).

6. The vertical planetary gearbox lubrication structure according to claim 5, characterized in that: A gap is provided between the outer ring of the baffle (40) and the upper housing (10), so that the lubricating oil sprayed from the first oil passage (11) flows from the gap to the second bearing (60).

7. The vertical planetary gearbox lubrication structure according to claim 1, characterized in that: The inner teeth are drum-shaped teeth.

8. The vertical planetary gearbox lubrication structure according to claim 1, characterized in that: The second oil circuit (22) comprises: An inclined oil passage (221) extending inwardly and obliquely downwardly from the outer wall of the input shaft (20); The vertical oil passage (222) extends vertically upward from the top of the connecting hole (21) and is in communication with the inclined oil passage (221).

9. The vertical planetary gearbox lubrication structure according to claim 4, characterized in that: The first bearing (50) comprises an upper bearing and a lower bearing, wherein the upper bearing and the lower bearing are arranged in the upper housing (10) at intervals in the vertical direction, the first oil circuit (11) is arranged below the lower bearing, and the third oil circuit (12) is arranged above the upper bearing.

10. The vertical planetary gearbox lubrication structure according to claim 5, characterized in that: Also includes: The lower case (80) is arranged below the upper case (10); the planetary carrier (70) is provided with a planetary gear (71) and an inner gear ring (72) meshing with the outer periphery of the planetary gear (71); the upper case (10) is connected to the top end of the inner gear ring (72); and the lower case (80) is connected to the bottom end of the inner gear ring (72); An output shaft (90) is arranged at the bottom end of the planetary carrier (70) and can rotate along with the planetary carrier (70) to output torque. The output shaft (90) is supported on the lower housing (80) via a third bearing (91).

Images