Gear box internally integrated with mechanical pump
By integrating the mechanical pump in the gear box, the housing and the gear box are formed integrally, the oil inlet passage extends vertically, and the oil outlet passage is inclined, the problems of compactness and lightweightness of the gear box are solved, and the compactness of the gear box is achieved and Miniaturization of mechanical pumps promotes oil flow and material savings.
Patent Information
- Application Number
- CN202411287827.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-14
- Publication Date
- 2024-12-10
AI Technical Summary
In the prior art, in order to reduce the vehicle volume, the way in which the oil pump is placed in the gear box is not conducive to achieving a compact and lightweight design of the gearbox.
Design a gear box with integrated mechanical pump, the housing and the gear box are formed integrally, the mechanical pump is immersed in gear oil, the oil inlet passage part extends in the vertical direction, and the oil outlet passage part inclines in the oil flow direction, reducing the installation structure , saves axial space and provides power to reduce pump body size.
The gear box is lightweight and compact, which promotes the rapid flow of gear oil, saves materials, simplifies the processing process, and improves the stability and compactness of mechanical pumps.
Smart Images
Figure CN119103333A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of automobile accessories, and in particular to a gear box with an integrated mechanical pump. Background Art
[0002] In the current commercial vehicle electric drive industry, the lubrication power sources of the electric drive assembly are mainly electronic oil pumps and mechanical oil pumps. For the lubrication of the gearbox, the mechanical oil pump is more stable in performance and life and has lower cost than the electronic oil pump. Considering that the electric drive gearbox requires a more compact layout space, the mechanical oil pump is also developing towards integration and miniaturization.
[0003] At present, in order to reduce the size of the vehicle, the oil pump is often arranged in the gearbox. This arrangement is not conducive to achieving a compact and lightweight design of the gearbox. The above problems need to be solved urgently. Summary of the invention
[0004] The invention discloses a gear box with an integrated mechanical pump, aiming to solve the technical problems existing in the prior art.
[0005] The present invention adopts the following technical solutions:
[0006] A gearbox with an integrated mechanical pump, comprising a gearbox and a mechanical pump; the mechanical pump is arranged in the gearbox and immersed in gear oil, comprising a shell and a conveying member; the shell is at least partially integrally formed with the gearbox, and the shell has a accommodating chamber, an oil inlet channel, an oil inlet hole of an oil outlet channel and an oil outlet hole; the accommodating chamber is used to install the conveying member; one end of the oil inlet hole is an oil inlet, and the other end is connected to one end of the oil inlet channel; the other end of the oil inlet channel is connected to the accommodating chamber, and at least a part extends in a vertical direction; one end of the oil outlet channel is connected to the accommodating chamber, and the other end is connected to one end of the oil outlet hole, and at least a part is arranged obliquely downward along the oil flow direction; the other end of the oil outlet hole is an oil outlet; the conveying member is rotatably connected to the shell, and meshes with the gear set of the gearbox for transmission, and is used to convey the gearbox oil from the oil inlet channel to the oil outlet channel via the accommodating chamber.
[0007] In the gearbox with an integrated mechanical pump of the present invention, the flow cross-sectional area of the oil inlet passage is larger than that of the oil outlet passage.
[0008] In the gearbox with an integrated mechanical pump of the present invention, the oil outlet passage includes a first outlet section and a second outlet section; the first outlet section is formed by a concave portion of the accommodating chamber, and is connected to one end of the second outlet section and the circumferential side wall of the accommodating chamber; the other end of the second outlet section is connected to the oil outlet hole, and at least a portion of the second outlet section is arranged to be inclined downward along the oil flow direction.
[0009] In the gearbox with an integrated mechanical pump of the present invention, the oil inlet passage includes a first feed section and a second feed section; one end of the first feed section is connected to the oil inlet hole, and the other end is connected to one end of the second feed section and the circumferential side wall of the accommodating cavity; the second feed section is formed by a concave portion of the accommodating cavity.
[0010] In the gearbox with an integrated mechanical pump of the present invention, the housing includes a rear housing and a cover body; the rear housing is integrally formed with the gearbox and has a accommodating recess and the oil inlet and oil outlet passages; the cover body covers the accommodating recess of the rear housing and seals the edge of the accommodating recess.
[0011] In the gearbox with an integrated mechanical pump of the present invention, the flow area of one side of the oil inlet passage and / or the oil outlet passage connected to the accommodating chamber is larger than the flow area of the other side.
[0012] In the gearbox with an integrated mechanical pump of the present invention, the oil inlet hole and the oil outlet hole are located on the same side of the conveying member.
[0013] In the gearbox of the integrated mechanical pump of the present invention, the conveying member includes an outer rotor, an inner rotor, a rotating shaft and a gear; the outer rotor is movably arranged in the accommodating chamber; the inner rotor is arranged on the inner side of the outer rotor; the rotating shaft is fixedly connected to the inner rotor and is rotatably connected to the housing; the gear is installed on the rotating shaft and can be meshed with the gear set of the gearbox for transmission.
[0014] In the gearbox with an integrated mechanical pump of the present invention, the inner rotor and the rotating shaft are detachably connected via a flat key.
[0015] In the gearbox with an integrated mechanical pump of the present invention, the housing has a first bearing mounting hole and a second bearing mounting hole; bearings are respectively mounted in the first bearing mounting hole and the second bearing mounting hole; and the two sides of the rotating shaft are respectively mounted on the bearings.
[0016] The technical solution adopted by the present invention can achieve the following beneficial effects:
[0017] The present invention mainly provides a gearbox with an integrated mechanical pump. Based on the fact that the shell is set to be partially integrally formed with the gearbox, there is no need to set up an additional connecting structure to connect the shell and the gearbox, thereby reducing the installation structure, so that the mechanical pump occupies a smaller space, saving axial space in the gearbox, making the pump body more lightweight and miniaturized, thereby making the gearbox lighter and more compact, and based on the fact that the gear set of the gearbox provides power for the conveying member, there is no need to set up other power elements to further reduce the size of the mechanical pump, making the pump body more lightweight and miniaturized; and based on the fact that a part of the oil inlet channel is set to extend vertically and a part of the oil outlet channel is set to be inclined downward along the oil flow direction, it can promote the rapid flow of the gear oil, and also make the mechanical pump compact in design, thereby saving materials and simplifying the processing process of the gearbox shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:
[0019] Figure 1 It is a structural schematic diagram of a gear box with an integrated mechanical pump according to the present invention;
[0020] Figure 2 It is a structural schematic diagram of a mechanical pump with a gear box integrated with a mechanical pump according to the present invention;
[0021] Figure 3 This is one of the schematic diagrams of the internal structure of the mechanical pump of the present invention;
[0022] Figure 4 The second schematic diagram of the internal structure of the mechanical pump of the present invention;
[0023] Figure 5 It is a schematic diagram of the explosion structure of the mechanical pump of the present invention.
[0024] Description of reference numerals:
[0025] 1. Shell; 11. Accommodating chamber; 12. Oil inlet passage; 121. First feed section; 122. Second feed section; 13. Oil outlet passage; 131. First discharge section; 132. Second discharge section; 14. Oil inlet hole; 15. Oil outlet hole; 16. Rear shell; 161. Accommodating recess; 17. Cover body; 18. First bearing mounting hole; 19. Second bearing mounting hole; 2. Conveying member; 21. Outer rotor; 22. Inner rotor; 23. Rotating shaft; 24. Gear; 25. Flat key; 26. Elastic retaining ring; 27. Bearing; 3. Filter. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.
[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 a magnetic connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of 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. In addition, in the description of this application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically limited.
[0028] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] In order to solve the problems existing in the prior art, an embodiment of the present application provides a gear box with an integrated mechanical pump.
[0030] like Figure 1-Figure 5 As shown, a gearbox with an integrated mechanical pump includes a gearbox A and a mechanical pump B; the mechanical pump B is arranged in the gearbox A and immersed in the gear oil, and includes a housing 1 and a conveying member 2; the housing 1 is at least partially integrally formed with the gearbox A, and has a housing chamber 11, an oil inlet channel 12, an oil outlet channel 13, an oil inlet hole 14 and an oil outlet hole 15 in the housing 1; the housing chamber 11 is used to install the conveying member 2; one end of the oil inlet hole 14 is an oil inlet, and the other end is connected to one end of the oil inlet channel 12; the other end of the oil inlet channel 12 is connected to the housing chamber 11, and at least a part extends in the vertical direction; one end of the oil outlet channel 13 is connected to the housing chamber 11, and the other end is connected to one end of the oil outlet hole 15, and at least a part is arranged obliquely downward along the oil flow direction; the other end of the oil outlet hole 15 is an oil outlet; the conveying member 2 is rotatably connected to the housing 1, and meshes with the gear set A1 of the gearbox A for transmission, and is used to convey the gearbox oil from the oil inlet channel 12 to the oil outlet channel 13 via the housing chamber 11.
[0031] The present invention provides a gearbox with an integrated mechanical pump. Based on the fact that the housing is partially integrally formed with the gearbox, there is no need to set up an additional connecting structure to connect the housing and the gearbox, thereby reducing the installation structure, so that the mechanical pump occupies a smaller space, saving axial space in the gearbox, making the pump body more lightweight and miniaturized, thereby making the gearbox lighter and more compact, and based on the fact that the gear set of the gearbox provides power for the conveying member, there is no need to set up other power elements, thereby further reducing the size of the mechanical pump, making the pump body more lightweight and miniaturized; and based on the fact that a part of the oil inlet channel is set to extend vertically and a part of the oil outlet channel is set to be inclined downward along the oil flow direction, it can promote the rapid flow of the gear oil, and also make the mechanical pump compact in design, thereby saving materials and simplifying the processing process of the gearbox housing.
[0032] In some preferred embodiments, the mechanical pump is disposed in the gear box A and immersed in the gear box oil of the gear box A; the mechanical pump B is immersed in the gear oil to facilitate the delivery of the gear oil.
[0033] In some preferred embodiments, Figure 3-Figure 5 The housing 1 comprises a rear housing 16 and a cover 17; the rear housing 16 is integrally formed with the gear box, and has a receiving recess 161, an oil inlet passage 12, and an oil outlet passage 13; the cover 17 is arranged on the receiving recess 161 of the rear housing 16, and seals the edge of the receiving recess 161; based on integrating the rear housing 16 on the gear box (specifically the inner wall of the gear box, such as integral casting), and providing the receiving recess 161 on the rear housing 16 to install the conveying member 2, the conveying member 2 is installed first during installation, and then the cover 17 is installed, so as to facilitate the positioning of the conveying member 2; preferably, the cover 17 is detachably connected to the rear housing 16 by bolts.
[0034] In some preferred embodiments, the oil outlet passage 13 includes a first outlet section 131 and a second outlet section 132; the first outlet section 131 is formed by a concave portion of the accommodating chamber 11, and is connected to one end of the second outlet section 132 and the circumferential side wall of the accommodating chamber 11, thereby being able to lubricate the circumferential surface of the conveying member 2 and reduce wear; the other end of the second outlet section 132 is connected to the oil outlet hole 15, and at least a portion of the second outlet section 132 is tilted downwardly along the oil flow direction; preferably, the second outlet section 132 is connected to one side of the first outlet section 131 and is tilted downwardly along the oil flow direction; preferably, the inclination angle is 8° (the angle between the extension direction of the second outlet section 132 and the horizontal direction), so as to facilitate docking and installation with the oil circuit of the gearbox A while increasing the oil delivery speed.
[0035] Preferably, the oil outlet hole 15 is arranged obliquely upward;
[0036] The cross-sectional area of the first discharge section 131 is larger than that of the second discharge section 132 ; thereby, the pressure of the oil passing through can be increased, thereby improving the output pressure of the pump, and at the same time, the overall structure of the pump can be made more compact.
[0037] Further preferably, the second discharge section 132 is surrounded by the rear shell 16 and the cover 17 to facilitate the installation of the conveying member 2.
[0038] In some preferred embodiments, the flow area on one side of the oil inlet 12 and / or the oil outlet 13 connected to the accommodating chamber 11 is larger than the flow area on the other side; a smaller oil inlet 12 can increase the flow rate of the fluid, thereby improving the suction efficiency, while also reducing cavitation and being beneficial to the compactness of the structural design.
[0039] In some preferred embodiments, Figure 3 and Figure 4 As shown, the oil inlet passage 12 includes a first feed section 121 and a second feed section 122; one end of the first feed section 121 is connected to the oil inlet hole 14, and the other end is connected to one end of the second feed section 122 and the circumferential side wall of the accommodating chamber 11; the second feed section 122 is formed by the concave part of the accommodating chamber 11; thereby, the circumferential surface of the conveying member 2 can be lubricated to reduce wear.
[0040] Preferably, the first feeding section 121 is surrounded by the rear shell body 16 and the cover body 17 to facilitate the installation of the conveying member 2.
[0041] In some preferred embodiments, the oil inlet hole 14 and the oil outlet hole 15 are located on the same side of the conveying member 2 to facilitate connection with the oil circuit on the gear box.
[0042] In some preferred embodiments, the flow cross-sectional area of the oil inlet passage 12 is larger than that of the oil outlet passage 13 , so as to ensure the efficient operation of the mechanical pump.
[0043] In some preferred embodiments, Figure 3 and Figure 5As shown, the conveying member 2 includes an outer rotor 21, an inner rotor 22, a rotating shaft 23 and a gear 24; the outer rotor 21 is movably arranged in the accommodating chamber 11; the inner rotor 22 is arranged inside the outer rotor 21; the rotating shaft 23 is fixedly connected to the inner rotor 22 and is rotatably connected to the housing 1; the gear 24 is installed on the rotating shaft 23 and can mesh with the gear set of the gearbox for transmission; the inner rotor 22 is fixed on the rotating shaft 23, and forms an eccentric contact with the outer rotor 21 in the accommodating chamber 11, and together constitutes four working chambers. When the inner and outer rotors rotate, the volume change of the working chamber leads to the oil suction and oil pressure process, realizing the suction and output of the engine oil. When the inner and outer rotors rotate, the volume change of the working chamber of the accommodating chamber 11 leads to the oil suction and oil pressure process, realizing the suction and output of the engine oil. In the traditional installation method, the mechanical pump needs to be centered twice: first, the centering of the mechanical pump itself, and second, the centering of the mechanical pump and the housing. This multiple centering process not only increases the difficulty of operation, but also affects the operating stability of the mechanical pump. The present invention directly mounts the mechanical pump shaft 23 on the gear box housing by integrating the mechanical pump internally, thereby simplifying the installation process and requiring only one centering, thereby effectively improving the operating stability of the mechanical pump.
[0044] Preferably, the position of the gear 24 is fixed by a circlip 26 .
[0045] In some preferred embodiments, Figure 5 As shown, the inner rotor 22 and the rotating shaft 23 are detachably connected via a flat key 25 ; specifically, keyways are respectively provided on the rotating shaft 23 and the inner rotor 22 , and the two keyways form a receiving portion for receiving the flat key 25 .
[0046] In some preferred embodiments, Figure 5 As shown, the housing 1 has a first bearing mounting hole 18 and a second bearing mounting hole 19 ; bearings 27 are respectively mounted in the first bearing mounting hole 18 and the second bearing mounting hole 19 ; and the two sides of the rotating shaft 23 are respectively mounted on the bearings 27 .
[0047] In some preferred embodiments, the gear box with the mechanical pump integrated therein further includes a filter 3, the outlet of the filter 3 is connected to the oil inlet hole 14, and is used to filter the gear oil entering the mechanical pump.
[0048] Preferably, the bearing 27 is a needle bearing.
[0049] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.
Claims
1. A gearbox with an integrated mechanical pump, characterized in that: It includes a gear box and a mechanical pump; the mechanical pump is arranged in the gear box and immersed in the gear oil, and includes a housing and a conveying member; The housing is at least partially formed integrally with the gear box, and the housing has a containing cavity, an oil inlet passage, an oil inlet hole and an oil outlet hole; The accommodating cavity is used to install the conveying member; One end of the oil inlet hole is an oil inlet port, and the other end is connected to one end of the oil inlet passage; The other end of the oil inlet passage is connected to the accommodating cavity, and at least a portion thereof extends in the vertical direction; One end of the oil outlet passage is connected to the accommodating cavity, and the other end is connected to one end of the oil outlet hole, and at least a part of the oil outlet passage is arranged to be inclined downward along the oil flow direction; The other end of the oil outlet hole is an oil outlet; The conveying member is rotatably connected to the housing and meshes with the gear set of the gear box for transmission, and is used to convey the gear box oil from the oil inlet passage to the oil outlet passage via the accommodating chamber.
2. The gearbox with an integrated mechanical pump according to claim 1, characterized in that: The flow cross-sectional area of the oil inlet passage is larger than that of the oil outlet passage.
3. The gearbox with an integrated mechanical pump according to claim 1 or 2, characterized in that: The oil outlet passage comprises a first outlet section and a second outlet section; The first discharge section is formed by a concave portion of the accommodating cavity and is connected to one end of the second discharge section and the circumferential side wall of the accommodating cavity; The other end of the second discharge section is connected to the oil outlet hole, and at least a portion of the second discharge section is arranged to be inclined downward along the oil flow direction.
4. The gearbox with an integrated mechanical pump according to claim 1 or 2, characterized in that: The oil inlet passage comprises a first feed section and a second feed section; One end of the first feed section is connected to the oil inlet hole, and the other end is connected to one end of the second feed section and the circumferential side wall of the accommodating cavity; The second feeding section is formed by a concave portion of the accommodating cavity.
5. The gearbox with an integrated mechanical pump according to claim 1, characterized in that: The housing comprises a rear housing and a cover; The rear housing is integrally formed with the gear box and has a receiving recess, the oil inlet passage, and the oil outlet passage; The cover body is disposed on the accommodating recess of the rear housing and seals the edge of the accommodating recess.
6. The gearbox with an integrated mechanical pump according to claim 1, characterized in that: The flow area of one side of the oil inlet passage and / or the oil outlet passage connected to the accommodating chamber is larger than the flow area of the other side.
7. The gearbox with an integrated mechanical pump according to claim 1, characterized in that: The oil inlet hole and the oil outlet hole are located on the same side of the conveying member.
8. The gearbox with an integrated mechanical pump according to claim 1, characterized in that: The conveying member includes an outer rotor, an inner rotor, a rotating shaft and a gear; The outer rotor is movably disposed in the accommodating chamber; The inner rotor is arranged inside the outer rotor; The rotating shaft is fixedly connected to the inner rotor and is rotatably connected to the housing; The gear is mounted on the rotating shaft and can be meshed with the gear set of the gear box for transmission.
9. The gearbox with an integrated mechanical pump according to claim 8, characterized in that: The inner rotor and the rotating shaft are detachably connected via a flat key.
10. The gearbox with an integrated mechanical pump according to claim 8, characterized in that: The housing is provided with a first bearing mounting hole and a second bearing mounting hole; Bearings are installed in the first bearing mounting hole and the second bearing mounting hole respectively; Both sides of the rotating shaft are respectively installed on the bearings.