Vertical crowned tooth coupling

Abstract

The utility model discloses a vertical crowned tooth coupler, which relates to the technical field of coupler manufacture, and comprises an inner gear sleeve, an annular boss is arranged in the inner gear sleeve and divides an inner cavity of the inner gear sleeve into an upper meshing groove and a lower meshing groove, the upper meshing groove and the lower meshing groove are respectively matched with an upper gear shaft and a lower gear shaft, and the upper meshing groove is provided with an oil storage ring; a first oil spraying pipe is arranged in the lower gear shaft, the lower gear shaft is fixed on the box body through a gland, the gland is provided with an oil conveying pipe communicated with the first oil spraying pipe, and the first oil spraying pipe sprays lubricating oil to a fit clearance between the lower gear shaft and the inner gear sleeve; the vertical crowned gear coupling solves the problems that the rotating speed of the gear shaft of an existing coupling is too high, lubricating oil is accumulated in a fit clearance due to the centrifugal effect, the lower crowned gear shaft cannot be rapidly soaked, the gear shaft cannot be damaged, and the service life of the lower crowned gear shaft is prolonged. And the technical problem that the lower crowned gear shaft is severely abraded at the initial stage of operation is solved.

Description

Technical Field

[0001] This utility model relates to the field of connecting shaft manufacturing technology, and in particular to a vertical drum-shaped gear coupling. Background Technology

[0002] Currently, some speed reducers incorporate drum gear couplings between transmission stages to compensate for machining and assembly errors. Because these couplings are located inside the reducer, they cannot be lubricated using the conventional methods of regular lubrication. Therefore, proper lubrication of the internal drum gear coupling is crucial. Poor lubrication between the internal gear sleeve and the drum gear shaft will lead to wear and damage to the drum gears. Most vertical drum gear couplings on the market are gravity-lubricated. When the coupling operates at high speeds, the lubricating oil is subject to centrifugal force and cannot quickly overflow to the meshing area of ​​the lower drum gears. This results in inadequate lubrication of each lower drum gear, causing severe wear or tooth breakage in the early stages of use, thus affecting the reliability and lifespan of the speed reducer.

[0003] In summary, developing a vertical drum-shaped gear coupling that can quickly and fully lubricate the internal gear sleeve and each drum-shaped gear shaft is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] The purpose of this utility model is to provide a vertical drum-shaped gear coupling, which solves the technical problem that existing vertical drum-shaped gear couplings rely on gravity lubrication, and the lubricating oil cannot quickly penetrate to the lower gear shaft during the high-speed rotation of the coupling, resulting in severe wear between the lower gear shaft and the inner gear sleeve.

[0005] To achieve the above objectives, this utility model provides a vertical drum-shaped gear coupling, comprising:

[0006] The inner gear sleeve has an annular boss inside, which divides the inner cavity of the inner gear sleeve into an upper meshing groove and a lower meshing groove. The upper meshing groove and the lower meshing groove are respectively engaged with the upper gear shaft and the lower gear shaft. An oil reservoir ring is provided at the edge of the port of the upper meshing groove.

[0007] The lower gear shaft is provided with a first oil injection pipe. The lower gear shaft is fixed to the housing by a pressure cover. The pressure cover is provided with an oil supply pipe that communicates with the first oil injection pipe. The first oil injection pipe extends towards the end near the upper meshing groove. The first oil injection pipe sprays lubricating oil into the gap between the lower gear shaft and the inner gear sleeve.

[0008] An annular oil injection pipe is located on the outer circumference of the lower gear shaft. A second oil injection pipe extends from the annular oil injection pipe away from the pressure cap and sprays lubricating oil into the oil reservoir ring.

[0009] Preferably, a slip ring is provided on the outer circumference of the lower gear shaft, and oil storage grooves are provided on both sides of the slip ring parallel to the axis of the lower gear shaft. The two oil storage grooves are respectively connected to the ports of the oil delivery pipe and the first oil injection pipe, and the two oil storage grooves are interconnected.

[0010] Preferably, a locking ring is screwed onto the lower gear shaft, and the locking ring abuts against the end face of the slip ring near the inner gear sleeve. The locking ring locks the position of the slip ring. An oil pan is provided on the end face of the locking ring away from the slip ring. The oil pan is used to receive lubricating oil overflowing from the gap between the inner gear sleeve and the lower gear shaft. The port of the oil pan is flush with the end face of the lower gear shaft that extends into the lower meshing groove.

[0011] Preferably, a spherical pin is provided on the end face of the upper gear shaft extending into the upper meshing groove, and a spherical pad is provided on the end face of the lower gear shaft extending into the lower meshing groove. The inner wall of the annular boss fits against the spherical pad, and the spherical pin abuts against the spherical pad. The upper gear shaft and the upper meshing groove, and the lower gear shaft and the lower meshing groove are all clearance fit.

[0012] Preferably, the annular boss is provided with an overflow hole along the axis of the inner gear sleeve, the overflow hole connects the upper meshing groove and the lower meshing groove, and the annular boss is provided with several drainage grooves on the end face edge near the upper gear shaft.

[0013] Preferably, the nozzle of the second oil injection pipe is offset to the side closer to the oil reservoir ring, so that the lubricating oil is sprayed onto the side wall of the upper gear shaft and inside the oil reservoir ring.

[0014] Preferably, both the annular injection pipe and the oil delivery pipe are connected to the oil supply device through an oil inlet connector.

[0015] Preferably, there are four overflow holes, four diversion channels, and four second fuel injection pipes.

[0016] Preferably, the pressure cap is connected to the housing by fasteners, and a bearing is provided between the housing and the lower gear shaft.

[0017] Preferably, a drain hole is provided on the side wall of the oil pan near the end of the pressure cap.

[0018] Compared to the aforementioned background technology, the vertical drum-shaped gear coupling provided by this utility model includes: an inner gear sleeve, with an annular boss in the inner cavity of the inner gear sleeve, the annular boss dividing the inner cavity of the inner gear sleeve into an upper meshing groove and a lower meshing groove, an upper gear shaft and a lower gear shaft respectively fitting in the upper meshing groove and the lower meshing groove, the lower gear shaft being fixed to the housing by a pressure cap, an oil supply pipe being provided inside the pressure cap, a first oil injection pipe being provided inside the lower gear shaft, the first oil injection pipe being connected to the oil supply pipe, an annular oil injection pipe being provided on the outer periphery of the inner gear sleeve, a second oil injection pipe extending from the end of the annular oil injection pipe away from the lower gear shaft, an oil reservoir ring being provided at the edge of the port of the upper meshing groove, before the vertical drum-shaped gear coupling operates, the annular oil injection pipe and the oil supply pipe are connected to the oil supply pipe. All oil pipes are connected to lubricating oil. The annular oil injection pipe sprays lubricating oil into the oil storage ring through the second oil injection pipe. The lubricating oil flows from the oil storage ring to the inner wall of the upper meshing groove, wetting the upper meshing groove and the upper gear shaft. The oil delivery pipe pumps the lubricating oil into the first oil delivery pipe. The first oil delivery pipe extends towards the side closer to the upper meshing groove, so that the first oil delivery pipe can fill the lubricating oil into the mating clearance between the lower gear shaft and the lower meshing groove. This application fills the mating clearance between the inner gear sleeve, the upper gear shaft, and the lower gear shaft with lubricating oil through the annular oil injection pipe and the oil delivery pipe. The lubricating oil wetting rate is rapid and stable, avoiding severe friction between the lower gear shaft and the inner gear sleeve in the early stage of operation, which would affect the service life and reliability of the vertical drum gear coupling. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a sectional view of the vertical drum-shaped gear coupling provided in an embodiment of the present utility model;

[0021] Figure 2 This is a top view of the vertical drum-shaped gear coupling provided in an embodiment of the present utility model;

[0022] Figure 3 This is a top view of the inner ring sleeve provided in an embodiment of the present utility model.

[0023] Among them, 1-inner gear sleeve; 101-oil reservoir ring; 2-annular boss; 21-overflow hole; 22-drain groove; 3-upper gear shaft; 31-spherical pin; 4-lower gear shaft; 41-first oil injection pipe; 42-spherical pad; 5-pressure cap; 51-oil supply pipe; 6-annular oil injection pipe; 61-second oil injection pipe; 7-slip ring; 71-oil reservoir; 8-locking ring; 9-oil pan; 91-drain hole; 10-bearing; 11-box body; 12-oil inlet connector. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] This utility model provides a vertical drum-shaped gear coupling, as shown in the attached instruction manual. Figure 1 To be continued Figure 3 As shown, the vertical drum-shaped gear coupling includes an inner gear sleeve 1. An annular boss 2 extends from the inner cavity of the inner gear sleeve 1 in a direction perpendicular to its own axis. The annular boss 2 divides the inner cavity of the inner gear sleeve 1 into an upper meshing groove and a lower meshing groove. An upper gear shaft 3 and a lower gear shaft 4 are respectively fitted in the upper meshing groove and the lower meshing groove. Both the upper gear shaft 3 and the lower gear shaft 4 rotate together with the inner gear sleeve 1. The lower gear shaft 4 is provided with a pressure cover 5 fixed on the housing 11 on its outer periphery. The pressure cover 5 abuts against the outside of the lower gear shaft 4 to ensure the stable operation of the vertical drum-shaped gear coupling. An oil supply pipe 51 is provided inside the gland 5 along its diameter direction. A first oil injection pipe 41 is provided inside the lower gear shaft 4 along its axial direction, and the first oil injection pipe 41 extends towards the side close to the upper gear shaft 3, so that the port of the first oil injection pipe 41 is located in the area where the lower gear shaft 4 and the lower meshing groove mate. The first oil injection pipe 41 and the oil supply pipe 51 are interconnected. An annular oil injection pipe 6 is provided on the outer periphery of the inner gear sleeve 1. A second oil injection pipe 61 extends from the end away from the gland 5. An oil reservoir ring 101 is provided on the edge of the port of the upper meshing groove. The inner cavity of the oil reservoir ring 101 is connected to the upper meshing groove. The nozzle of the second oil injection pipe 61 corresponds to the oil reservoir ring 101. Before using the vertical drum gear coupling provided in this application, the oil supply pipe 51 and the annular oil injection pipe 6 were separate. Do not pump lubricating oil into the first oil injection pipe 41 and the second oil injection pipe 61. The lubricating oil is sprayed from the first oil injection pipe 41 into the oil reservoir ring 101, and then flows from the oil reservoir ring 101 to the inner wall of the upper meshing groove, so that the upper meshing groove and the upper gear shaft 3 are fully wetted. The second oil injection pipe 61 is continuously filled with lubricating oil, and the lubricating oil overflows from the port of the second oil injection pipe 61 into the mating gap between the lower gear shaft 4 and the lower meshing groove, fully wetting the lower gear shaft 4 and the lower meshing groove. The lubricating oil in the oil reservoir 71 flows through the inner hole of the annular boss 2 into the mating gap between the lower gear shaft 4 and the lower meshing groove, further ensuring the relative movement between the lower gear shaft 4 and the inner gear sleeve 1 is stable and smooth, extending the service life of the vertical drum gear coupling and ensuring its operational reliability.

[0027] Both the oil supply pipe 51 and the annular oil injection pipe 6 are connected to the oil supply device through the oil inlet connector 12. The oil supply device supplies lubricating oil to the oil supply pipe 51 and the annular oil injection pipe 6. The opening direction of the oil injection port of the second oil supply pipe 51 is set at a certain angle with the axis of the upper gear shaft 3. When the second oil supply pipe 51 sprays lubricating oil, some of the lubricating oil falls directly into the oil storage ring 101, while the rest of the lubricating oil is directly sprayed onto the side wall of the upper gear shaft 3.

[0028] Please refer to the instruction manual appendix. Figure 1 A slip ring 7 is fixed to the outer circumference of the lower gear shaft 4. The slip ring 7 rotates together with the lower gear shaft 4, that is, the slip ring 7 is clamped between the pressure cap 5 and the slip ring 7. This allows for easy replacement and lower cost by ensuring contact between the slip ring 7 and the pressure cap 5, avoiding friction and collision between the lower gear shaft 4 and the pressure cap 5, which would increase replacement costs. At the same time, the slip ring 7 locks the position of the lower gear shaft 4, preventing the lower gear shaft 4 from swinging within the pressure cap 5 and affecting the transmission effect. Preferably, oil reservoirs 71 are provided on the inner and outer walls of the slip ring 7 parallel to the axis of the lower gear shaft 4, and the two oil reservoirs 71 are interconnected. That is, the lubricating oil in the oil supply pipe 51 passes through the two oil reservoirs 71 of the slip ring 7 and then enters the first oil injection pipe 41 of the lower gear shaft 4. During the operation of the vertical drum gear coupling, the slip ring 7 rotates together with the lower gear shaft 4. The oil reservoir 71 of the slip ring 7 periodically connects with the oil supply pipe 51. When the oil reservoir 71 connects with the oil supply pipe 51, the oil supply pipe 51 fills the oil reservoir 71 of the slip ring 7 with lubricating oil. When the oil reservoir 71 does not connect with the oil supply pipe 51, some of the lubricating oil in the oil reservoir 71 can enter the gap between the lower gear shaft 4 and the lower meshing groove through capillary effect, and be evenly coated on the side wall of the lower gear shaft 4 and the lower meshing groove by the centrifugal force generated by the rotation of the lower gear shaft 4, so as to ensure that the lower gear shaft 4 can continuously and uninterruptedly supply oil when rotating.

[0029] Furthermore, a locking ring 8 is fitted onto the lower gear shaft 4. Tightening the locking ring 8 moves it closer to the slip ring 7, causing it to engage with the end face of the slip ring 7 near the upper gear shaft 3. This restricts the axial freedom of the slip ring 7, preventing it from sliding along the axis of the lower gear shaft 4 during rotation. This would prevent the lubricating oil from the oil supply pipe 51 from entering the first oil injection pipe 41 through the oil reservoir 71, thus hindering continuous lubrication between the lower gear shaft 4 and the lower meshing groove and affecting the normal operation of the vertical drum gear coupling. The pressure cap 5 is installed on the housing 11 with fasteners. A bearing 10 is provided between the lower gear shaft 4 and the housing 11, which assists in the smooth rotation of the lower gear shaft 4 while restricting its horizontal freedom.

[0030] Please continue to refer to the instruction manual appendix. Figure 1An oil pan 9 is fixed on the end face of the locking ring 8 away from the slip ring 7. It should be noted that the diameter of the oil pan 9 is larger than the diameter of the inner gear sleeve 1 but smaller than the diameter of the annular oil injection pipe 6. The side wall of the oil pan 9 extends towards the side closer to the upper gear shaft 3. The port of the oil pan 9 is at the same horizontal plane as the end face of the lower gear shaft 4 that extends into the lower meshing groove, or is higher than the end face of the lower gear shaft 4. During the continuous operation of the vertical drum gear coupling, the first oil injection pipe 41 continuously reduces the clearance between the lower meshing groove and the lower gear shaft 4. The lubricating oil is internally supplied and overflows into the oil basin 9 along the mating gap between the two parts. The lubricating oil gradually accumulates in the oil basin 9, and the liquid level of the accumulated lubricating oil gradually rises above the end face of the lower gear shaft 4, so that both the lower gear shaft 4 and the lower meshing groove are immersed in the accumulated lubricating oil. This means that the oil supply pipe 51 only needs to continuously supply lubricating oil in the initial stage of operation of the vertical drum gear coupling. After the vertical drum gear coupling has been running for a period of time, the oil supply pipe 51 can stop supplying lubricating oil, reducing the waste of lubricating oil and lowering the operating cost.

[0031] Preferably, several drain holes 91 are provided on the side wall of the oil basin 9 near the bottom surface of the oil basin 9. During the long-term relative rotation of the upper gear shaft 3, lower gear shaft 4 and inner gear sleeve 1, a certain degree of wear will inevitably occur between the upper gear shaft 3, lower gear shaft 4 and inner gear sleeve 1. The waste generated by the wear accumulates in the mating clearance of each component. When the second oil supply pipe 51 sprays lubricating oil, the lubricating oil flows through the mating clearance and carries the accumulated waste into the oil basin 9. In addition, the high temperature and high pressure generated during the operation of each component cause some of the lubricating oil to deteriorate and fail to play a lubricating role. The waste oil also flows into the oil basin 9 with the lubricating oil. After the waste oil is heated, the carbon content increases and it is deposited at the bottom of the oil basin 9 with the heavier waste. The operator needs to open the drain holes 91 regularly to drain the waste oil and waste at the bottom of the oil basin 9 to keep the vertical drum gear coupling components clean and ensure its reliable operation.

[0032] Please refer to the instruction manual appendix. Figure 1A spherical pin 31 is connected to the end face of the upper gear shaft 3 that extends into the upper meshing groove, and a spherical pad 42 is connected to the end face of the lower gear shaft 4 that extends into the lower meshing groove. The diameter of the spherical pad 42 gradually decreases towards the side closer to the upper gear shaft 3, allowing a portion of the spherical pad 42 to extend into the annular boss 2. The sidewall of the spherical pad 42 fits against the inner sidewall of the annular boss 2. The spherical pin 31 also extends into the annular boss 2 and abuts against the end face of the spherical pad 42. The fit between the spherical pin 31 and the spherical pad 42 allows the upper gear shaft 3 to mesh with the lower gear shaft 4. There is a certain amount of wobble and displacement between shaft 3 and lower gear shaft 4. When the upper gear shaft 3 deviates to a certain extent during operation, it avoids severe friction between the upper gear shaft 3 and the inner gear sleeve 1, which would cause damage to the upper gear shaft 3 component. The spherical pin 31 and the spherical pad 42 make point contact, which reduces the wear of the upper gear shaft 3, lower gear shaft 4 and annular boss 2. In addition, during the process of lubricating oil passing through annular boss 2, the spherical pin 31 and spherical pad 42 can be used to guide the lubricating oil, which facilitates the transfer of lubricating oil to the lower gear shaft 4.

[0033] Furthermore, several overflow holes 21 are evenly distributed on the annular boss 2. The overflow holes 21 extend along the axial direction of the inner gear sleeve 1, connecting the upper meshing groove and the lower meshing groove. The lubricating oil can not only flow from the inner hole of the annular boss 2 to the lower meshing groove, but also enter the lower meshing groove from the overflow holes 21, which improves the flow rate of the lubricating oil. Several guide grooves 22 are evenly distributed on the inner ring edge of the annular boss 2. Each guide groove 22 guides the lubricating fluid from the upper meshing groove to the lower meshing groove.

[0034] Preferably, the overflow hole 21 is an oblong hole, and there are four overflow holes 21, four drainage grooves 22, and four second oil injection pipes 61. The above components are respectively set on three concentric pitch circles, and the arcs corresponding to the arcs between adjacent overflow holes 21, drainage grooves 22, and second oil injection pipes 61 are all 90°, so that the lubricating oil can evenly wet the upper gear shaft 3, the lower gear shaft 4, and the inner gear sleeve 1.

[0035] In one embodiment of this application, before starting the vertical drum gear coupling, lubricating oil is supplied to the annular oil injection pipe 6 and the oil delivery pipe 51 through the oil supply device. The first oil injection pipe 41 fills the overflowing lubricating oil between the lower gear shaft 4 and the lower meshing teeth, while the second oil injection pipe 61 sprays lubricating oil into the upper gear shaft 3 and the oil reservoir 71. The lubricating oil flows into the mating clearance between the upper gear shaft 3 and the upper meshing groove. After the upper gear shaft 3, lower gear shaft 4, and inner gear sleeve 1 are fully immersed in lubricating oil, the vertical drum gear coupling is started. The upper gear shaft 3, lower gear shaft 4, and inner gear sleeve 1 rotate relative to each other, and the slip ring 7 rotates together with the lower gear shaft 4. The oil reservoir 71 on the side wall of the slip ring 7 receives the lubricating oil from the oil delivery pipe 51 and... During the operation of the lower gear shaft 4, lubricating oil is continuously supplied to the lower gear shaft 4. The first oil injection pipe 41 continuously sprays oil to keep the lubricating oil wetted by the upper gear shaft 3. After the vertical drum gear coupling has been running for a period of time, the lubricating oil in the upper meshing groove enters the lower meshing groove through the inner hole of the annular boss 2 and the overflow hole 21. The lubricating oil sprayed out by the first oil injection pipe 41 flows into the oil basin 9 along the side wall of the lower gear shaft 4. The lubricating fluid in the oil basin 9 accumulates and the accumulated lubricating fluid covers the end face of the lower gear shaft 4, continuously lubricating the lower gear shaft 4. This ensures good lubrication between the upper gear shaft 3, the lower gear shaft 4 and the inner gear sleeve 1, reduces severe wear between the components, and improves the reliability and service life of the vertical drum gear coupling.

[0036] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0037] This article uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principles of this utility model, and these improvements and modifications also fall within the protection scope of this utility model.

Claims

1. A vertical gear coupling of the drum type, characterized in that, The utility model provides a kind of internal gear sleeve (1), the annular boss (2) is equipped in the internal gear sleeve (1), the annular boss (2) separates the inner cavity of the internal gear sleeve (1) into upper meshing groove and lower meshing groove, the upper meshing groove, the lower meshing groove are respectively matched with upper pinion (3), lower pinion (4), the port edge of the upper meshing groove is equipped with oil storage ring (101); The lower pinion (4) is equipped with first oil injection pipe (41) inside, the lower pinion (4) is fixed on the box (11) by gland (5), the gland (5) is equipped with oil pipe (51) that communicates with the first oil injection pipe (41), the first oil injection pipe (41) extends to the end close to the upper meshing groove, the first oil injection pipe (41) is sprayed lubricating oil to the lower pinion (4) and the gap cooperation of internal gear sleeve (1). Annular oil injection pipe (6) is arranged on the outer periphery of the lower pinion (4), the annular oil injection pipe (6) extends to the second oil injection pipe (61) away from the gland (5) side, the second oil injection pipe (61) sprays the lubricating oil into the oil storage ring (101). The outer periphery of the lower pinion (4) is equipped with a slip ring (7), the slip ring (7) is equipped with an oil storage groove (71) on the two side walls parallel to the axis of the lower pinion (4), the two oil storage grooves (71) are respectively connected with the port of the oil pipe (51) and the first oil injection pipe (41), and the two oil storage grooves (71) are communicated with each other.

2. The vertical gear coupling as claimed in claim 1, wherein, The lower pinion (4) is screwed with a locking ring (8), the end face of the locking ring (8) and the slip ring (7) close to the internal gear sleeve (1) abuts, the locking ring (8) locks the position of the slip ring (7), the end face of the locking ring (8) away from the slip ring (7) side is equipped with an oil pan (9), the oil pan (9) is used for receiving the lubricating oil overflowing from the gap between the internal gear sleeve (1) and the lower pinion (4), the port of the oil pan (9) is flush with the end face of the lower pinion (4) extending into the lower meshing groove.

3. The vertical gear coupling as claimed in claim 2, wherein, The end face of the upper pinion (3) extending into one side of the upper meshing groove is equipped with a spherical pin (31), the end face of the lower pinion (4) extending into the lower meshing groove is equipped with a spherical pad (42), the inner wall of the annular boss (2) is attached to the spherical pad (42), the spherical pin (31) abuts with the spherical pad (42), the upper pinion (3) and the upper meshing groove, the lower pinion (4) and the lower meshing groove are all gap matched.

4. The vertical gear coupling as claimed in claim 3, wherein, The annular boss (2) is equipped with an overflow hole (21) along the axis direction of the internal gear sleeve (1), the overflow hole (21) communicates the upper meshing groove with the lower meshing groove, the end face edge of the annular boss (2) close to the axis of the upper pinion (3) is equipped with a plurality of drainage grooves (22).

5. The vertical gear coupling as claimed in claim 1, wherein, The nozzle of the second oil injection pipe (61) is offset to the side close to the oil storage ring (101), so that the lubricating oil is sprayed on the side wall of the upper pinion (3) and the oil storage ring (101).

6. The vertical gear coupling as claimed in claim 2, wherein, The annular oil injection pipe (6) and the oil pipe (51) are communicated with the oil supply device through the oil inlet joint (12).

7. The vertical gear coupling as claimed in claim 1, wherein, ​ 8. The vertical gear coupling as claimed in claim 5, wherein, The overflow holes (21), the drainage grooves (22) and the second oil injection tubes (61) are all four in number.

9. The vertical gear coupling as claimed in claim 1, wherein, The gland (5) is connected to the box (11) by fasteners, and a bearing (10) is arranged between the box (11) and the lower pinion shaft (4).

10. The vertical gear coupling as claimed in claim 3, wherein, The oil pan (9) is provided with a blowhole (91) on the side wall of the end close to the gland (5).

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