Motor input heat dissipation structure and input system

Abstract

The utility model discloses a motor input heat radiation structure and an input system. The motor input heat radiation structure comprises a housing, a housing gear shaft, a first bearing, a second bearing and a third bearing. The gear shaft comprises a gear part, a first supporting part and a second supporting part, the first supporting part and the second supporting part are arranged on the two sides of the gear part respectively, the first supporting part is installed in the shell through a first bearing and a second bearing, the second supporting part is installed in the shell through a third bearing, and the motor is installed on the shell and is in transmission connection with the gear shaft; an oil channel is formed in the shell, a first oil hole and a second oil hole which are communicated with the oil channel are further formed in the shell, and lubricating oil can be supplied to the first bearing and the second bearing through the oil channel and the first oil hole; lubricating oil can be supplied to the third bearing through the oil duct and the second oil hole. The structure adopts an integral module design, and has the characteristics of high integration, convenience in whole vehicle arrangement, capability of considering the walking and power take-off use requirements of the electric loader, realization of high-speed input of the motor and the like.

Description

Technical Field

[0001] The utility model relates to the field of engineering machinery power transmission, in particular to a motor input heat dissipation structure and an input system. Background Art

[0002] Among the gear transmissions in construction machinery powertrains, the development and application of multi-speed hydraulic transmissions for traditional diesel engines is highly mature. With the rise of China's new energy strategy, the development of electric transmissions for construction machinery, particularly loaders, has also begun. However, current electric loaders generally utilize a single, high-torque, low-speed motor, which has a low maximum speed, is bulky and heavy, and is costly, often requiring independent lubrication and cooling systems. Utility Model Content

[0003] In order to solve the problems of low maximum speed and high cost of electric loaders in the prior art, the purpose of the present utility model is to provide a motor input heat dissipation structure and input system, which can enable the electric loader to input high speed, and the built-in heat dissipation structure enables the input structure to operate stably and reliably.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions: a motor input heat dissipation structure, including a shell, an input component connected to the motor transmission is arranged in the shell, the input component includes a gear shaft, a first bearing, a second bearing and a third bearing; the gear shaft includes a gear part, a first support part and a second support part, the first support part and the second support part are respectively arranged on both sides of the gear part, the first support part is installed in the shell through the first bearing and the second bearing, the second support part is installed in the shell through the third bearing, the motor is installed on the shell, and the motor is connected to the gear shaft transmission; an oil channel is provided on the shell, and a first oil hole and a second oil hole connected to the oil channel are also provided on the shell, the first oil hole is arranged between the first bearing and the second bearing, and lubricating oil can be supplied to the first bearing and the second bearing through the oil channel and the first oil hole; lubricating oil can be supplied to the third bearing through the oil channel and the second oil hole.

[0005] Preferably, a center hole is provided on the gear shaft, and a third oil hole connected to the center hole is provided on the oil passage.

[0006] Preferably, a mounting groove is provided on the inner wall of the housing, a first oil groove and a second oil groove are provided in the mounting groove, the third bearing is installed in the mounting groove, the second oil hole is connected to the first oil groove, and the third oil hole is connected to the second oil groove.

[0007] Preferably, a fourth oil hole connected to the oil channel is further provided on the housing. The fourth oil hole is arranged above the gear part, and the lubricating oil can flow out through the fourth oil hole and drip onto the gear part.

[0008] Preferably, a bearing seat is provided in the housing, the housing supports the bearing seat, the first bearing and the second bearing are mounted on the bearing seat, and the first oil hole passes through the bearing seat.

[0009] Preferably, a first shoulder is raised on the first support part; a nut, a locking plate, a first spacer and a second spacer are provided on the first support part, and the nut is threadedly connected to the first support part; on the first support part, the locking nut, the locking plate, the first spacer, the inner ring of the first bearing, the second spacer, the inner ring of the second bearing and the first shoulder are tightened in sequence.

[0010] Preferably, the inner ring of the bearing seat has a raised second shoulder; the first support portion is provided with an oil sleeve, an end cover is fixed on the bearing seat, and a third shoulder is raised on the end cover; the third shoulder of the end cover, the outer ring of the first bearing, the oil sleeve, the outer ring of the second bearing and the second shoulder on the bearing seat are pressed tightly in sequence; the first oil hole is connected to the oil sleeve.

[0011] Preferably, the oil passage includes a front oil supply part and a rear oil supply part, the front oil supply part is connected to the first oil hole, and the rear oil supply part is connected to the second oil hole; a first oil inlet hole connected to the front oil supply part is provided on the outer shell, a second oil inlet hole connected to the rear oil supply part is provided on the outer shell, and a first oil return hole connected to the oil pool is provided on the outer shell.

[0012] Preferably, two groups of input components are installed on the housing, and the two motors provide power to the two groups of input components respectively.

[0013] A motor input system comprises the above-mentioned motor input heat dissipation structure.

[0014] The beneficial effects of the technical solution of the present invention are as follows: the above-mentioned structure adopts an integral modular design, so that the entire structure can be installed together on the casing of the gearbox, or can be removed together from the gearbox during disassembly and maintenance, which not only provides a more stable transmission environment for the gear shaft, but also facilitates the subsequent maintenance work of the above-mentioned structure; and the above-mentioned structure can provide more sufficient lubrication and heat dissipation for various parts of the gear shaft, so that the above-mentioned structure can meet the high-speed limit speed requirement; the above-mentioned oil channel and the outer shell are integrated into a design, so that the heat dissipation of the above-mentioned structure is better and the reliability is higher; the utility model has the characteristics of reliable structure, high integration, convenient vehicle layout, and can take into account the travel and power take-off requirements of the electric loader and realize high-speed input of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the input system;

[0016] Figure 2 This is the structural diagram of the input system after removing the motor;

[0017] Figure 3This is a schematic diagram of the motor input heat dissipation structure;

[0018] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0019] Figure 5 This is a schematic diagram of the dual-motor structure.

[0020] Reference numerals: 1, input component; 11, gear shaft; 111, gear portion; 112, first support portion; 113, second support portion; 114, center hole; 12, first bearing; 13, second bearing; 14, third bearing; 15, bearing seat; 16, end cover; 17, nut; 18, locking plate; 19, first spacer; 10, second spacer; 100, oil sleeve;

[0021] 2. Motor; 21. Motor shaft; 22. Third oil inlet hole; 23. Fourth oil inlet hole; 24. Second oil return hole; 25. Second connection surface;

[0022] 3. Oil channel; 31. First oil hole; 32. Second oil hole; 33. Third oil hole; 34. Fourth oil hole;

[0023] 4. Housing; 41. First connecting surface; 42. First oil inlet hole; 43. Second oil inlet hole; 44. First oil return hole; 45. First oil groove; 46. Second oil groove. DETAILED DESCRIPTION

[0024] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0027] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0028] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature. Example

[0029] like Figures 1 to 5 The illustrated motor input heat dissipation structure includes a housing 4, within which is disposed an input component 1 transmission-connected to a motor 2. The input component 1 includes a gear shaft 11, a first bearing 12, a second bearing 13, and a third bearing 14. The gear shaft 11 includes a gear portion 111, a first support portion 112, and a second support portion 113. The first support portion 112 and the second support portion 113 are respectively disposed on either side of the gear portion 111. The first support portion 112 is mounted within the housing 4 via the first bearing 12 and the second bearing 13. The second support portion 113 is mounted within the housing 4 via the third bearing 14. The motor 2 is mounted on the housing 4 and transmission-connected to the first support portion 112 of the gear shaft 11.

[0030] An oil passage 3 is provided in the housing 4, and a first oil hole 31 and a second oil hole 32 connected to the oil passage 3 are also provided on the housing 4. The first oil hole 31 is provided between the first bearing 12 and the second bearing 13. Lubricating oil can be supplied to the first bearing 12 and the second bearing 13 through the oil passage 3 and the first oil hole 31; the second oil hole 32 supplies oil to the third bearing 14.

[0031] With such an arrangement, the input component 1 adopts an integral modular design, which can provide a more stable transmission environment for the gear shaft 11; and the structure can provide more adequate lubrication and heat dissipation for each part of the gear shaft 11, so that the structure can meet the high-speed limit speed requirement; the oil channel 3 and the housing 4 are integrated into one design, which makes the heat dissipation of the structure better and the reliability higher; the utility model has the characteristics of reliable structure, high integration, convenient vehicle layout, and can take into account the travel and power take-off requirements of the electric loader and realize high-speed input of the motor 2.

[0032] In this embodiment, a center hole 114 is formed on the gear shaft 11, and a third oil hole 33 is formed on the oil passage 3 and is connected to the center hole 114. This arrangement can further improve the heat dissipation capacity of the structure.

[0033] In this embodiment, the housing 4 is further provided with a fourth oil hole 34 that communicates with the oil passage 3. This fourth oil hole 34 is positioned above the gear portion 111, allowing lubricating oil to flow out through the fourth oil hole 34 and drip onto the gear portion 111. Multiple fourth oil holes 34 are provided. This arrangement further enhances the heat dissipation capability of the structure, improving the stability of the gear transmission and the life of the gears.

[0034] In this embodiment, a mounting groove is defined on the inner wall of the housing 4. A first oil groove 45 and a second oil groove 46 are disposed within the mounting groove. The third bearing 14 is mounted within the mounting groove. The second oil hole 32 communicates with the first oil groove 45, and the third oil hole 33 communicates with the second oil groove 46. This arrangement facilitates positioning of the various components and provides more adequate lubrication for the bearings and gear shaft 11.

[0035] In this embodiment, Figure 3 and Figure 4As shown, a bearing seat 15 is provided in the housing 4, and the housing supports the bearing seat 15. The first bearing 12 and the second bearing 13 are installed on the bearing seat 15. A first shoulder is raised on the first support portion 112, and a second shoulder is raised on the inner ring of the bearing seat 15. It also includes a nut 17, a locking plate 18, a first spacer 19, a second spacer 10 and an oil sleeve 100 sleeved on the first support portion 112. The nut 17 is threadedly connected to the first support portion 112; on the first support portion 112, a locking nut 17, a locking plate 18, a first spacer 19, a second spacer 10 and an oil sleeve 100 are tightened. The spacer ring 19, the inner ring of the first bearing 12, the second spacer ring 10, the inner ring of the second bearing 13, and the first shoulder are sequentially abutted. The system also includes an end cap 16 fixed to the bearing seat 15, with a raised third shoulder extending into the bearing seat 15. On the first support portion 112, the third shoulder of the end cap 16, the outer ring of the first bearing 12, the oil sleeve 100, the outer ring of the second bearing 13, and the second shoulder of the bearing seat 15 are sequentially abutted. The first oil hole 31 passes through the bearing seat 15 and communicates with the oil sleeve 100. Furthermore, preferably, a fourth shoulder is raised on the second support portion 113 of the gear shaft 11. The inner ring of the third bearing 14 abuts against the fourth shoulder, and the inner wall of the mounting groove abuts against the outer ring of the third bearing 14. This arrangement facilitates assembly, positioning, and disassembly of the various components. The gear shaft, bearing seat, and bearings can be integrated, allowing the motor and input component to be removed from the housing as a single unit, facilitating subsequent maintenance.

[0036] In this embodiment, the first bearing 12 is a four-point contact bearing, the second bearing 13 is a short cylindrical bearing, and the third bearing 14 is a short cylindrical bearing.

[0037] In the embodiment, Figure 3 and Figure 4 As shown, the motor shaft 21 of the motor 2 extends into the housing 4. A connecting groove is provided at the end of the motor shaft 21. A transmission portion protrudes from the first support portion 112, which extends into the connecting groove and is spline-connected to the motor shaft 21. This arrangement enables quick assembly and disassembly between the motor 2, the housing 4, and the gear shaft 11. Furthermore, the motor shaft 21 extends into the bearing seat 15, and an oil seal is provided between the bearing seat 15 and the motor shaft 21.

[0038] In this embodiment, Figure 2 、 Figure 3 and Figure 5As shown, the oil channel 3 includes a front oil supply part and a rear oil supply part, the front oil supply part is connected to the first oil hole 31, and the rear oil supply part is connected to the second oil hole 32 and the third oil hole 33; the housing 4 is provided with a first oil inlet hole 42 connected to the front oil supply part, the housing 4 is provided with a second oil inlet hole 43 connected to the rear oil supply part, and the housing 4 is provided with a first oil return hole 44 connected to the oil pool of the gearbox; further preferably, the housing 4 is provided with a first connecting surface 41 for mounting the motor 2, and the first oil inlet hole 42, the second oil inlet hole 43 and the first oil return hole are all provided on the first connecting surface 41. Furthermore, the housing of motor 2 is provided with a second connecting surface 25 that mates with first connecting surface 41. A third oil inlet hole 22, a fourth oil inlet hole 23, and a second oil return hole 24 are formed in the housing of motor 2. These third oil inlet hole 22, fourth oil inlet hole 23, and second oil return hole 24 are disposed on the second connecting surface 25. After motor 2 is mounted on housing 4, the third oil inlet hole 22 communicates with the front oil supply portion via the first oil inlet hole 42, the fourth oil inlet hole 23 communicates with the rear oil supply portion via the second oil inlet hole 43, and the second oil return hole 24 communicates with the oil reservoir of housing 4 via the first oil return hole 44. This arrangement makes the oil circuit structure more compact and provides more effective lubrication for various parts of input component 1.

[0039] In this embodiment, Figure 1 、 Figure 2 and Figure 5 As shown, there are two sets of input components 1, and two motors 2 provide power to each set of input components 1. The two motors 2 act on the input components 1 connected to them. The two sets of input components 1 respectively serve as the travel input component and the power take-off input component. This can meet the travel and power take-off requirements of the electric loader. Moreover, because the travel input component and the power take-off input component have the same structure, they are interchangeable.

[0040] An input system includes the above-mentioned motor input heat dissipation structure. The input system can be connected to the gearbox through the gear shaft 11. The shell of the above-mentioned motor input heat dissipation structure can be directly installed on the gearbox housing, so that the entire structure can be installed on the gearbox housing together, or can be removed from the gearbox together during disassembly and maintenance.

[0041] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and purpose of the present invention.

Claims

1. A motor input heat dissipation structure, characterized by: The invention comprises a housing (4), an input component (1) in transmission connection with a motor (2) is arranged in the housing (4), the input component (1) comprises a gear shaft (11), a first bearing (12), a second bearing (13) and a third bearing (14); the gear shaft (11) comprises a gear portion (111), a first support portion (112) and a second support portion (113), the first support portion (112) and the second support portion (113) are respectively arranged on both sides of the gear portion (111), the first support portion (112) is mounted in the housing (4) through the first bearing (12) and the second bearing (13), the second support portion (113) is mounted in the housing (4) through the third bearing (14), the motor (2) is mounted on the housing (4), and the motor (2) is in transmission connection with the gear shaft (11); An oil passage (3) is provided on the housing (4). A first oil hole (31) and a second oil hole (32) communicating with the oil passage (3) are also provided on the housing (4). The first oil hole (31) is provided between the first bearing (12) and the second bearing (13). Lubricating oil can be supplied to the first bearing (12) and the second bearing (13) through the oil passage (3) and the first oil hole (31); and lubricating oil can be supplied to the third bearing (14) through the oil passage (3) and the second oil hole (32).

2. The motor input heat dissipation structure according to claim 1, characterized in that: A center hole (114) is formed on the gear shaft (11), and a third oil hole (33) communicating with the center hole (114) is formed on the oil passage (3).

3. The motor input heat dissipation structure according to claim 2, characterized in that: A mounting groove is provided on the inner wall of the housing (4), a first oil groove (45) and a second oil groove (46) are provided in the mounting groove, the third bearing (14) is mounted in the mounting groove, the second oil hole (32) is connected to the first oil groove (45), and the third oil hole is connected to the second oil groove (46).

4. The motor input heat dissipation structure according to claim 1, characterized in that: The housing (4) is further provided with a fourth oil hole (34) connected to the oil passage (3). The fourth oil hole (34) is arranged above the gear portion (111). Lubricating oil can flow out through the fourth oil hole (34) and drip onto the gear portion (111).

5. The motor input heat dissipation structure according to claim 1, characterized in that: A bearing seat (15) is provided in the housing (4), the housing (4) supports the bearing seat (15), the first bearing (12) and the second bearing (13) are mounted on the bearing seat (15), and the first oil hole (31) passes through the bearing seat (15).

6. The motor input heat dissipation structure according to claim 5, characterized in that: A first shoulder is raised on the first support portion (112); a nut (17), a locking plate (18), a first spacer (19) and a second spacer (10) are provided on the first support portion (112); the nut (17) is threadedly connected to the first support portion (112); on the first support portion (112), the locking nut (17), the locking plate (18), the first spacer (19), the inner ring of the first bearing (12), the second spacer (10), the inner ring of the second bearing (13) and the first shoulder are pressed in sequence.

7. The motor input heat dissipation structure according to claim 5, characterized in that: The inner ring of the bearing seat (15) is provided with a second shoulder; an oil sleeve (100) is sleeved on the first support portion (112); an end cover (16) is fixed on the upper portion of the bearing seat (15); a third shoulder is provided on the end cover (16); the third shoulder of the end cover (16), the outer ring of the first bearing (12), the oil sleeve (100), the outer ring of the second bearing (13) and the second shoulder on the bearing seat (15) are pressed in sequence; the first oil hole (31) is communicated with the oil sleeve (100).

8. The motor input heat dissipation structure according to claim 1, characterized in that: The oil passage (3) includes a front oil supply portion and a rear oil supply portion, the front oil supply portion is communicated with the first oil hole (31), and the rear oil supply portion is communicated with the second oil hole (32); The housing (4) is provided with a first oil inlet hole (42) connected to the front oil supply part, the housing (4) is provided with a second oil inlet hole (43) connected to the rear oil supply part, and the housing (4) is provided with a first oil return hole (44) connected to the oil pool.

9. The motor input heat dissipation structure according to claim 1, characterized in that: Two sets of input components (1) are installed on the housing, and two motors (2) respectively provide power to the two sets of input components (1).

10. A motor input system, characterized in that: A motor input heat dissipation structure comprising any one of claims 1 to 9.

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