Transmission structure of main oil pump of speed increasing box

Abstract

The utility model discloses a main oil pump transmission structure of a speed increasing box, which relates to the field of speed increasing boxes and comprises a box body, a gear pump, an oil pump transmission shaft and an oil pump driven gear. An outer deep groove ball bearing and an inner deep groove ball bearing are arranged in a gap between the oil pump transmission shaft and the box body, an outer space ring and an inner space ring are arranged between the outer deep groove ball bearing and the inner deep groove ball bearing, a first oil inlet hole is formed in the inner side wall of the box body and located above the oil pump transmission shaft, and an annular groove is formed in the outer side wall of the outer space ring. A second oil inlet hole is formed in the annular groove, a first oil return hole is formed in the inner side wall of the oil pump mounting base, and a second oil return hole is formed in the inner side wall of the box body. The gear pump spline is simple in structure and convenient to machine and install, the transmission stability of an oil pump is improved, and the service life of the gear pump spline is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of speed increasing boxes, in particular to a main oil pump transmission structure of a speed increasing box. Background Art

[0002] The main oil pump of the speed increaser is usually installed under the low-speed main shaft. The oil pump driving gear installed on the low-speed main shaft drives the oil pump driven gear. The oil pump driven gear is connected to the main oil pump through an oil pump drive shaft and drives it to rotate. It enters the oil hole or oil channel inside the gear box through the pipeline and delivers the lubricating oil to various bearing positions and gear oil injection pipes of the gear box for lubrication and cooling.

[0003] The general structure of the oil pump drive shaft is single-supported, that is, the oil pump driven gear is installed with screws at one end of the oil pump drive shaft, and the other end is connected to the gear pump. At the end close to the gear pump, it is supported by a deep groove ball bearing, and round nuts and stop washers are used to prevent axial movement of the bearing. This structure is similar to a seesaw. The oil pump driven gear far away from the fulcrum is a cantilever structure, which will have a certain impact on the smoothness of the transmission; in addition, it will also cause wear of the oil pump spline and reduce the service life of the oil pump; and it is necessary to process external threads on the oil pump drive shaft, which can easily cause the inner and outer rings of the bearing to separate during installation, increasing the difficulty of processing and assembly. Utility Model Content

[0004] In view of the above problems existing in the transmission structure of the main oil pump of the existing speed increasing box, the present utility model is proposed.

[0005] Therefore, the purpose of the present invention is to provide a transmission structure for a main oil pump of a speed increasing gearbox, which solves the problems raised by the background technology.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] and a gear train connected to the oil pump shaft and the gear train connected to the oil pump shaft via a channel slot and a check valve in the channel.

[0008] Preferably, a lubrication gap is left between the outer spacer and the inner spacer, and the outer deep groove ball bearing and the inner deep groove ball bearing are interference fit with the oil pump drive shaft.

[0009] Preferably, the shaft wall of the oil pump transmission shaft does not need to be processed with external threads.

[0010] Preferably, the oil pump mounting seat adopts a T-shaped structure, and the oil pump mounting seat is fixedly connected to the outer side wall of the box body by a first bolt.

[0011] Furthermore, the center of the oil pump driven gear is fixedly connected to the oil pump transmission shaft through a second bolt.

[0012] Preferably, the number of the second oil inlet holes is three.

[0013] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0014] The utility model adopts two deep groove ball bearings as support points of the oil pump drive shaft by providing an outer deep groove ball bearing and an inner deep groove ball bearing, thereby improving the rotation stability of the oil pump drive shaft and prolonging the service life of the gear pump spline. At the same time, the outer deep groove ball bearing and the inner deep groove ball bearing have an interference fit with the oil pump drive shaft, and there is no need to process an external thread on the shaft wall of the oil pump drive shaft, so that the inner and outer rings of the outer deep groove ball bearing and the inner deep groove ball bearing will not separate, thereby reducing the difficulty of processing and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a schematic diagram of the local structure of the utility model;

[0017] Figure 2 For the utility model Figure 1 A three-dimensional diagram of the inner and outer spacers.

[0018] Description of reference numerals:

[0019] 1. Housing; 2. Gear pump; 3. Oil pump drive shaft; 4. Oil pump driven gear; 5. Oil pump mounting seat; 6. External deep groove ball bearing; 7. Internal deep groove ball bearing; 8. External spacer; 9. Internal spacer; 10. First oil inlet hole; 11. Second oil inlet hole; 12. Second oil return hole; 13. Second oil return hole; 14. First bolt; 15. Second bolt. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] The utility model provides Figure 1-2 The shown structure comprises a main oil pump transmission structure of a speed increasing gearbox, comprising a casing 1, a gear pump 2, an oil pump drive shaft 3 and an oil pump driven gear 4, and is characterized in that an oil pump mounting seat 5 is fixedly provided on the outer wall of the casing 1, the gear pump 2 is fixedly mounted on the side wall of the oil pump mounting seat 5, one end of the oil pump drive shaft 3 is fixedly connected to the output end of the gear pump 2, and the other end of the oil pump drive shaft 3 extends to the interior of the casing 1 and is fixedly connected to the oil pump driven gear 4, and the oil pump driven gear 4 can drive the oil pump drive shaft 3 to rotate when rotating, and the oil pump drive shaft 3 can drive the gear pump 2 to work. An outer deep groove ball bearing 6 and an inner deep groove ball bearing 7 are provided in the gap between the oil pump drive shaft 3 and the housing 1, and an outer spacer 8 and an inner spacer 9 are provided between the outer deep groove ball bearing 6 and the inner deep groove ball bearing 7. A lubrication gap is left between the outer spacer 8 and the inner spacer 9, and the outer deep groove ball bearing 6 and the inner deep groove ball bearing 7 have an interference fit with the oil pump drive shaft 3. The shaft wall of the oil pump drive shaft 3 does not need to be processed with an external thread. When installing, first install the inner deep groove ball bearing 7 on the oil pump drive shaft 3, and then put them into the hole of the housing 1 coaxially, and then install the outer spacer 8 and the inner spacer 9, and finally install the outer deep groove ball bearing 6. During installation, neither the inner ring nor the outer ring of the outer deep groove ball bearing 6 and the inner deep groove ball bearing 7 will cause damage to the bearings; a first oil inlet hole 10 is provided on the inner side wall of the housing 1 and located above the oil pump drive shaft 3, and the outer spacer An annular groove is provided on the outer wall of the ring 8, and a second oil inlet hole 11 is provided inside the annular groove. The number of the second oil inlet holes 11 is three. A first oil return hole 12 is provided on the inner wall of the oil pump mounting base 5, and a second oil return hole 13 is provided on the inner wall of the housing 1. The first oil return hole 12 and the second oil return hole 13 are connected. The lubricating oil inside the housing 1 can enter the interior of the first oil inlet hole 10, and then flow to the periphery of the outer spacer ring 8, and then enter between the outer spacer ring 8 and the inner spacer ring 9 through the second oil inlet hole 11. Since there is a gap between the outer spacer ring 8 and the inner spacer ring 9, it can ensure that the lubricating oil enters the outer deep groove ball bearings 6 and the inner deep groove ball bearings 7 on both sides and lubricates them. The excess lubricating oil will flow to the bottom and return to the interior of the housing 1 through the first oil return hole 12 and the second oil return hole 13.

[0022] In order to ensure a stable installation between the oil pump mounting base 5 and the box body 1, Figure 1 As shown, the oil pump mounting base 5 adopts a T-shaped structure, which can play a better sealing installation role, and the oil pump mounting base 5 is fixedly connected to the outer side wall of the box body 1 through the first bolt 14.

[0023] Finally, in order to ensure that the oil pump driven gear 4 is firmly installed with the oil pump driven gear 4, as shown in FIG. Figure 1As shown, the center of the oil pump driven gear 4 is fixedly connected to the oil pump transmission shaft 3 via a second bolt 15 .

[0024] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A transmission structure for a main oil pump of a speed increasing gearbox, comprising a housing (1), a gear pump (2), an oil pump transmission shaft (3) and an oil pump driven gear (4), characterized in that: An oil pump mounting seat (5) is fixedly provided on the outer side wall of the housing (1), the gear pump (2) is fixedly mounted on the side wall of the oil pump mounting seat (5), one end of the oil pump transmission shaft (3) is fixedly connected to the output end of the gear pump (2), and the other end of the oil pump transmission shaft (3) extends into the interior of the housing (1) and is fixedly connected to the oil pump driven gear (4); An outer deep groove ball bearing (6) and an inner deep groove ball bearing (7) are provided in the gap between the oil pump transmission shaft (3) and the housing (1); an outer spacer (8) and an inner spacer (9) are provided between the outer deep groove ball bearing (6) and the inner deep groove ball bearing (7); a first oil inlet hole (10) is provided on the inner side wall of the housing (1) and located above the oil pump transmission shaft (3); an annular groove is provided on the outer side wall of the outer spacer (8), and a second oil inlet hole (11) is provided inside the annular groove; a first oil return hole (12) is provided on the inner side wall of the oil pump mounting seat (5); a second oil return hole (13) is provided on the inner side wall of the housing (1); and the first oil return hole (12) and the second oil return hole (13) are connected.

2. The transmission structure of the main oil pump of the speed increasing gearbox according to claim 1, characterized in that: A lubrication gap is left between the outer spacer (8) and the inner spacer (9), and an interference fit is formed between the outer deep groove ball bearing (6) and the inner deep groove ball bearing (7) and the oil pump transmission shaft (3).

3. The transmission structure of the main oil pump of the speed increasing gearbox according to claim 1, characterized in that: The shaft wall of the oil pump transmission shaft (3) does not need to be processed with external threads.

4. The transmission structure of the main oil pump of the speed increasing gearbox according to claim 1, characterized in that: The oil pump mounting seat (5) adopts a T-shaped structure, and the oil pump mounting seat (5) is fixedly connected to the outer side wall of the box body (1) via a first bolt (14).

5. The transmission structure of the main oil pump of the speed increasing gearbox according to claim 1, characterized in that: The center of the oil pump driven gear (4) is fixedly connected to the oil pump transmission shaft (3) via a second bolt (15).

6. The transmission structure of the main oil pump of the speed increasing gearbox according to claim 1, characterized in that: The number of the second oil inlet holes (11) is three.

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