CN217632603U - Gear transmission system structure - Google Patents
Gear transmission system structure Download PDFInfo
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- CN217632603U CN217632603U CN202220343012.4U CN202220343012U CN217632603U CN 217632603 U CN217632603 U CN 217632603U CN 202220343012 U CN202220343012 U CN 202220343012U CN 217632603 U CN217632603 U CN 217632603U
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- gear
- timing
- hydraulic pump
- idler gear
- idler
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Abstract
The utility model provides a gear drive structure, include: the timing gear comprises a crankshaft timing gear, a hydraulic pump idle gear, a timing idle gear, an oil pump driving gear and a camshaft gear. The crankshaft timing gear comprises a first meshing portion, a second meshing portion and a first fixing portion, wherein the first meshing portion, the second meshing portion and the first fixing portion are arranged in the axial direction of the crankshaft timing gear respectively. The hydraulic pump idler gear is meshed with the first meshing part, the timing idler gear is meshed with the second meshing part, the oil pump driving gear is sleeved on the first fixing part and is coaxially arranged with the crankshaft timing gear, and the camshaft gear is meshed with the timing idler gear. The utility model discloses a hydraulic pump idler gear drives hydraulic pump gear, and the hydraulic pump gear drives hydraulic pump work. Avoid the vibrations of hydraulic pump during operation to directly transmit the camshaft through the gear, influence the stability of camshaft. The smooth and reliable air distribution timing is ensured, and the whole gear transmission system is more compact.
Description
Technical Field
The utility model belongs to the technical field of the engine, especially, gear drive structure.
Background
In prior art, the camshaft gear directly drives the hydraulic pump with hydraulic pump gear engagement, and the vibrations that the impact of hydraulic pump formed can directly transmit the camshaft through the gear, influence the stability of camshaft, further influence the smoothness of distribution timing. And the arrangement space in the gear chamber is limited. Therefore, a gear transmission system structure is needed to be designed, so that the gear transmission system of the engine is smooth and reliable, and the whole engine is compact in arrangement.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a gear drive structure.
According to an aspect of the present invention, there is provided a gear train structure, including:
the timing gear comprises a first meshing part, a second meshing part and a first fixing part which are respectively arranged along the axial direction of the timing gear;
a hydraulic pump idle gear that meshes with the first meshing section;
a timing idler gear that meshes with the second meshing section;
the oil pump driving gear is sleeved on the first fixing part and is coaxially arranged with the crankshaft timing gear;
a camshaft gear meshed with the timing idle gear;
preferably, a center distance between the cam shaft gear and the hydraulic pump idle gear is smaller than a sum of a radius of the cam shaft gear and a radius of the hydraulic pump idle gear.
Preferably, the first engaging portion is located between the second engaging portion and a first fixing portion, the hydraulic pump idle gear is located between the oil pump driving gear and the timing idle gear in an axial direction of the crankshaft timing gear, and the first fixing portion is located at an axially outer end of the crankshaft timing gear.
Preferably, the axial interval between the timing idle gear and the hydraulic pump idle gear is less than or equal to 3mm, and the axial interval between the hydraulic pump idle gear and the oil pump driving gear is less than or equal to 3mm.
Preferably, the fuel injection system further comprises a fuel injection pump gear engaged with the timing idle gear and a hydraulic pump gear engaged with the hydraulic pump idle gear, and the camshaft gear and the fuel injection pump gear are located axially inside the hydraulic pump gear.
Preferably, the timing idler gear shaft is rotatably connected with the timing idler gear shaft, the timing idler gear shaft comprises a first limiting portion and a second fixing portion located on the outer side of the first limiting portion, the second fixing portion is in a shaft shape, the timing idler gear is sleeved on the second fixing portion, a first pressing plate is arranged at the outer end of the second fixing portion in the axial direction, and the first pressing plate is fixed with the second fixing portion.
Preferably, a first lubricating portion is arranged between the timing idler gear and the radial outer end of the second fixing portion, gaps are formed among the timing idler gear, the first limiting portion and the first pressing plate, a first oil channel and a second oil channel are arranged in the timing idler gear shaft, one end of the first oil channel is communicated with the second oil channel, and the other end of the first oil channel is communicated with the first lubricating portion.
Preferably, the hydraulic pump idler gear shaft is rotatably connected with the hydraulic pump idler gear shaft, the hydraulic pump idler gear shaft and the timing idler gear shaft are identical in structure, and the fixing mode of the hydraulic pump idler gear and the hydraulic pump idler gear shaft is identical to the fixing mode of the timing idler gear and the timing idler gear shaft.
Preferably, a phase signal panel is arranged on the outer side of the fuel injection pump gear, and the phase signal panel comprises a first main body part and a protruding part, wherein the protruding part is distributed on the outer circumferential surface of the first main body part.
Preferably, the crankshaft timing gear, the hydraulic pump idler gear, the timing idler gear, the camshaft gear, the fuel injection pump gear and the hydraulic pump gear are all helical gears, and the fuel pump driving gear is a spur gear.
Compared with the prior art, the utility model provides a pair of gear drive structure has following beneficial effect:
the crankshaft timing gear is provided with a first meshing part, a second meshing part and a first fixing part, and the hydraulic pump idle gear is meshed with the first meshing part and the timing idle gear is meshed with the second meshing part, so that mutual interference is avoided and the installation space is saved;
the hydraulic pump gear is driven by the hydraulic pump idler gear and drives the hydraulic pump to work. Avoid the vibrations of hydraulic pump during operation to directly transmit the camshaft through the gear, influence the stability of camshaft. The smooth and reliable air distribution timing is ensured, and the whole gear transmission system is more compact.
Drawings
The present invention will be described in further detail with reference to the following drawings and detailed description:
fig. 1 is a perspective view of a gear train structure of the present invention;
fig. 2 is a front view of the gear train structure of the present invention;
fig. 3 is a bottom view of the gear train structure of the present invention;
fig. 4 is a partial perspective view of the gear train structure of the present invention;
fig. 5 is an exploded view of the crankshaft timing gear of the present invention;
fig. 6 is a cross-sectional view of the timing idler gear of the present invention;
fig. 7 is a cross-sectional view of the idler gear of the hydraulic pump of the present invention.
The engine comprises a crankshaft timing gear 1, a first meshing part 101, a second meshing part 102, a second meshing part 103, a first fixing part 2, a hydraulic pump idle gear 3, a timing idle gear, a pump driving gear 4, a camshaft gear 5, a fuel injection pump gear 6, a hydraulic pump gear 7, a timing idle gear shaft 8, a first limiting part 81, a second fixing part 82, a first oil channel 83, a second oil channel 84, a first pressure plate 9, a first lubricating part 10, a hydraulic pump idle gear shaft 11, a second limiting part 111, a third oil channel fixing part 112, a third oil channel 113, a fourth oil channel 114, a fourth oil channel 12, a second pressure plate 13, a second lubricating part 13, a phase signal disc 14, a first main body part 15 and a bulge part 16.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the description below are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
Referring to fig. 1, a gear train structure includes: the timing gear comprises a crankshaft timing gear 1, a hydraulic pump idle gear 2, a timing idle gear 3, an oil pump driving gear 4, a camshaft gear 5, an oil injection pump gear 6 and a hydraulic pump gear 7.
Referring to fig. 4 and 5, the crankshaft timing gear 1 includes a first fixing portion 103, a second meshing portion 102 disposed inside the first fixing portion 103, and a first meshing portion 101 disposed between the second meshing portion 102 and the first fixing portion 103, and the first meshing portion 101, the second meshing portion 102, and the first fixing portion 103 are all disposed along the axial direction of the crankshaft timing gear 1. Preferably, the first engaging portion 101 and the second engaging portion 102 are integrally formed, and in other embodiments, the first engaging portion 101 and the second engaging portion 102 may be separately designed and fixed to each other. In other embodiments, the first fixing portion 103 is disposed between the first engaging portion 101 and the second engaging portion 102, or the second engaging portion 102 is disposed between the first engaging portion 101 and the first fixing portion 103.
Referring to fig. 2, the hydraulic pump idler gear 2 is engaged with the first engagement portion 101 and is positioned at the upper left of the crankshaft timing gear 1. The timing idle gear 3 is engaged with the second engaging portion 102 and is positioned at the upper right of the crankshaft timing gear 1. The oil pump driving gear 4 is sleeved on the first fixing portion 103 and is arranged coaxially with the crankshaft timing gear 1. Preferably, the oil pump driving gear 4 and the first fixing portion 103 are fixed by interference, and the oil pump driving gear 4 and the crankshaft timing gear 1 have the same angular velocity, but in other embodiments, other fixing methods may be adopted to fix the oil pump driving gear 4 and the first fixing portion 103.
The camshaft gear 5 is meshed with the timing idler gear 3, and the camshaft gear 5 is located at the upper left of the timing idler gear 3. The fuel injection pump gear 6 is meshed with the timing idler gear 3, and the fuel injection pump gear 6 is located on the upper right of the timing idler gear 3. The hydraulic pump gear 7 is engaged with the hydraulic pump idle gear 2, and the hydraulic pump gear 7 is located at the upper left of the hydraulic pump idle gear 2.
The center distance between the cam shaft gear 5 and the hydraulic pump idle gear 2 is smaller than the sum of the radius of the cam shaft gear 5 and the radius of the hydraulic pump idle gear 2, namely the projection of the cam shaft gear 5 and the hydraulic pump idle gear 2 on the plane vertical to the axis direction is partially overlapped, so that the space occupied by the gear system in a gear chamber is further reduced, and the layout is more compact.
Referring to fig. 3, the camshaft gear 5, the timing idler gear 3, and the oil injection pump gear 6 are located at the same layer inside the hydraulic pump idler gear 2, the hydraulic pump idler gear 2 and the hydraulic pump gear 7 are located at the same layer, and the oil pump driving gear 4 is separately located at one layer outside the hydraulic pump idler gear 2.
The axial interval between the timing idler gear 3 and the hydraulic pump idler gear 2 is 3mm, the axial interval between the hydraulic pump idler gear 2 and the oil pump driving gear 4 is 3mm, and the axial interval between the gears in other embodiments can be smaller than 3mm, so that the whole layout of the gear train structure is more compact, the required installation space is reduced, and the occupied space of the gear box and the whole machine is smaller.
Referring to fig. 6, the timing idle gear 3 is rotatably connected to the timing idle gear shaft 8, the timing idle gear shaft 8 includes a first limiting portion 81 and a second fixing portion 82 located outside the first limiting portion 81, the second fixing portion 82 is in a shaft shape, the timing idle gear 3 is sleeved on the second fixing portion 82, a first pressing plate 9 is arranged at an axial outer end of the second fixing portion 82, and the first pressing plate 9 is fixed to the second fixing portion 82 through a fixing bolt.
A first lubricating portion 10 is arranged between the timing idle gear 3 and the radial outer end of the second fixing portion 82, gaps are arranged between the timing idle gear 3, the first limiting portion 81 and the first pressing plate 9, a second oil channel 84 and a first oil channel 83 perpendicular to the second oil channel 84 are formed in the timing idle gear shaft 8, the second oil channel 84 is distributed along the axial direction, one end of the first oil channel 83 is communicated with the second oil channel 84, and the other end of the first oil channel 83 is communicated with the first lubricating portion 10.
The engine oil can flow into the first lubricating portion 10 through the second oil passage 84 and the first oil passage 83, forming an oil film, which performs a lubricating function. The oil flows out through the gap between the timing idle gear 3, the first stopper 81, and the first presser plate 9, and finally returns to the oil pan of the engine.
Referring to fig. 7, the idle gear 2 of the hydraulic pump is rotatably connected to the idle gear shaft 11 of the hydraulic pump, the idle gear shaft 11 of the hydraulic pump includes a second limiting portion 111 and a third fixing portion 112 located outside the second limiting portion 111, the third fixing portion 112 is in a shaft shape, the idle gear 2 of the hydraulic pump is sleeved on the third fixing portion 112, a second pressing plate 12 is arranged at an axial outer end of the third fixing portion 112, and the second pressing plate 12 is fixed to the third fixing portion 112 through a fixing bolt.
A second lubricating portion 13 is arranged between the hydraulic pump idle gear 2 and the outer end of the third fixing portion 112 in the radial direction, gaps are arranged between the hydraulic pump idle gear 2, the second limiting portion 111 and the second pressure plate 12, a fourth oil channel 114 and a third oil channel 113 perpendicular to the fourth oil channel 114 are formed in the hydraulic pump idle gear shaft 11, one end of the third oil channel 113 is communicated with the fourth oil channel 114, and the other end of the third oil channel 113 is communicated with the second lubricating portion 13.
The oil can flow into the second lubricating portion 13 through the fourth oil passage 114 and the third oil passage 113, form an oil film for lubrication, and flow out from the gap between the hydraulic pump idle gear 2 and the second stopper portion 111 and the second presser plate 12, and finally return to the oil pan of the engine.
Referring to fig. 1, a phase signal panel 14 is disposed outside the fuel injection pump gear 6, the phase signal panel 14 includes a first main body portion 15 and protruding portions 16, the protruding portions 16 are distributed on an outer circumferential surface of the first main body portion 15, and the phase signal panel 14 is used for transmitting a phase signal to control a time interval between opening and closing of fuel injection of the fuel injector.
Referring to fig. 1 and 3, the crankshaft timing gear 1, the hydraulic pump idle gear 2, the timing idle gear 3, the camshaft gear 5, the fuel injection pump gear 6, and the hydraulic pump gear 7 are all helical gears, and the engine oil pump driving gear 4 is a spur gear. The gear train structure adopts the mode that helical gear and straight-teeth gear combine to use, and is more steady in the transmission, when the noise reduction, has reduced the production of axial thrust to reduce the damage to axial structure, improved the transmission performance of gear train.
The utility model discloses a gear drive mechanism drives hydraulic pump idler gear 2 and timing idler gear 3 and rotates simultaneously through the rotation of bent axle timing gear 1, still drives the oil pump driving gear 4 rotation of fixing in bent axle timing gear 1 outer end simultaneously. And then drives the hydraulic pump gear 7 through the hydraulic pump idler gear 2. The timing idler gear 3 drives the camshaft gear 5 and the injection pump gear 6 simultaneously. The oil pump driving gear 4 drives an oil pump gear (not shown) engaged with the oil pump driving gear to rotate, and the whole structure is compact and the operation is stable.
It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.
Claims (10)
1. A gear train structure, comprising:
a crankshaft timing gear including a first meshing part, a second meshing part, and a first fixing part, which are respectively disposed along an axial direction of the crankshaft timing gear;
a hydraulic pump idle gear that meshes with the first meshing section;
a timing idler gear that meshes with the second meshing section;
the oil pump driving gear is sleeved on the first fixing part and is coaxially arranged with the crankshaft timing gear;
a camshaft gear that meshes with the timing idler gear.
2. The gear train structure according to claim 1, wherein a center distance between the cam gear and the hydraulic pump idler gear is smaller than a sum of a radius of the cam gear and a radius of the hydraulic pump idler gear.
3. The gear train structure according to claim 1, wherein said first meshing portion is located between said second meshing portion and a first fixed portion, said hydraulic pump idle gear is located between an oil pump driving gear and a timing idle gear in an axial direction of said crankshaft timing gear, and said first fixed portion is located at an axially outer end of said crankshaft timing gear.
4. A gear train arrangement according to claim 3, wherein the axial spacing between the timing idler gear and the hydraulic pump idler gear is less than or equal to 3mm, and the axial spacing between the hydraulic pump idler gear and the oil pump drive gear is less than or equal to 3mm.
5. The gear train structure according to claim 4, further comprising an oil injection pump gear that meshes with the timing idler gear and a hydraulic pump gear that meshes with the hydraulic pump idler gear, the camshaft gear and the oil injection pump gear being located axially inside the hydraulic pump gear.
6. The gear drive train structure according to claim 1, further comprising a timing idler gear shaft, wherein the timing idler gear shaft is rotatably connected to the timing idler gear shaft, the timing idler gear shaft comprises a first limiting portion and a second fixing portion located outside the first limiting portion, the second fixing portion is in a shaft shape, the timing idler gear is sleeved on the second fixing portion, a first pressing plate is arranged at an axial outer end of the second fixing portion, and the first pressing plate is fixed to the second fixing portion.
7. The gear train structure according to claim 6, wherein a first lubricating portion is provided between the timing idler gear and a radially outer end of the second fixing portion, gaps are provided between the timing idler gear and the first stopper portion and between the timing idler gear and the first presser plate, a first oil passage and a second oil passage are provided in the timing idler gear shaft, one end of the first oil passage communicates with the second oil passage, and the other end of the first oil passage communicates with the first lubricating portion.
8. The gear drive train structure of claim 7 further comprising a hydraulic pump idler gear shaft rotatably coupled to the hydraulic pump idler gear shaft, the hydraulic pump idler gear shaft being configured identically to the timing idler gear shaft, the hydraulic pump idler gear being fixed to the hydraulic pump idler gear shaft in the same manner as the timing idler gear shaft.
9. The gear train structure according to claim 5, wherein a phase signal disc is provided on an outer side of the injection pump gear, the phase signal disc including a first main body portion and a protruding portion, the protruding portion being disposed on an outer circumferential surface of the first main body portion.
10. The gear train structure of claim 1, wherein the crankshaft timing gear, the hydraulic pump idler gear, the timing idler gear, the camshaft gear, the fuel injection pump gear, and the hydraulic pump gear are helical gears, and the oil pump drive gear is a spur gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220343012.4U CN217632603U (en) | 2022-02-18 | 2022-02-18 | Gear transmission system structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220343012.4U CN217632603U (en) | 2022-02-18 | 2022-02-18 | Gear transmission system structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217632603U true CN217632603U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220343012.4U Active CN217632603U (en) | 2022-02-18 | 2022-02-18 | Gear transmission system structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217632603U (en) |
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2022
- 2022-02-18 CN CN202220343012.4U patent/CN217632603U/en active Active
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