Transfer case and engineering machinery
By installing fasteners on the transfer case housing and cover to directly fix the gearbox and connect the lubrication oil holes, the problems of complex structure and high cost in the prior art are solved, and the effects of simplified assembly and cost reduction are achieved.
Patent Information
- Application Number
- CN202520775104.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-04-23
AI Technical Summary
In existing construction machinery, the transfer case and gearbox are connected by an external connecting plate and oil pipe, resulting in a complex structure, difficult assembly, large space occupation, and high cost.
The transfer case has first and second fixing members on its housing and cover, which are fixed to the gearbox through the first and second mating end faces, realizing direct communication with the lubricating oil hole, eliminating the need for external oil supply pipes and pipe joints, and simplifying the structure.
This technology enables reliable installation and lubrication of the gearbox, simplifies the assembly process, reduces space occupation and cost, and improves assembly efficiency.
Smart Images
Figure CN223868507U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of transfer case technology, and in particular to a transfer case and engineering machinery. Background Technology
[0002] In existing technologies, the transfer case and gearbox in construction machinery such as loaders, bulldozers, and forklifts are two independent housings. The transfer case and gearbox are fixed together by external connecting plates or other structures, and an external oil pipe is required to allow lubricating oil from the transfer case to enter the gearbox and lubricate the bearings and gears. However, this structure requires separate connecting plates, oil pipes, and other components, making the overall structure complex, difficult to assemble, and space-consuming. It also requires corresponding pipe fittings and other accessories, increasing operating costs. Utility Model Content
[0003] The purpose of this utility model is to provide a transfer case and engineering machinery that can directly fix the gearbox on the transfer case, and eliminate the need for external oil supply pipes, pipe joints and other accessories while ensuring the connection of the lubricating oil circuit, thereby simplifying the overall structure, facilitating assembly and reducing space occupation.
[0004] To achieve this objective, the present invention adopts the following technical solution:
[0005] A transfer case includes a case body and a case cover that are fastened together, and the transfer case further includes:
[0006] A first fixing member is used to fix it to the gearbox. The first fixing member is disposed on the housing. The first fixing member has a first mating end face. The first mating end face is used to mat with the gearbox. The first mating end face has a first lubricating oil hole that communicates with the housing. The first lubricating oil hole is used to communicate with a second lubricating oil hole opened on the gearbox.
[0007] The second fixing member is used to fix it to the gearbox. The second fixing member is disposed on the cover and has a second mating end face for mating with the gearbox.
[0008] Preferably, a first reinforcing rib is provided between the first fixing member and the box body; and a second reinforcing rib is provided between the second fixing member and the box cover.
[0009] Preferably, the box body, the first fixing member, and the first reinforcing rib are integrally cast; the box cover, the second fixing member, and the second reinforcing rib are integrally cast.
[0010] Preferably, the first fixing member has a first mounting hole, the gearbox has a first fixing hole, and the first bolt passes through the first mounting hole and is threadedly connected to the first fixing hole; the second fixing member has a second mounting hole, the gearbox has a second fixing hole, and the second bolt passes through the second mounting hole and is threadedly connected to the second fixing hole.
[0011] Preferably, there are multiple first reinforcing ribs, and a first mounting hole is provided between every two adjacent first reinforcing ribs; there are multiple second reinforcing ribs, and a second mounting hole is provided between every two adjacent second reinforcing ribs.
[0012] Preferably, the first fixing member and / or the second fixing member are provided with weight-reducing grooves.
[0013] Preferably, a sealing ring is provided between the first lubricating oil hole and the second lubricating oil hole.
[0014] Preferably, the gearbox has a groove on the outer edge of the second lubricating oil hole, and the sealing ring is embedded in the groove.
[0015] Preferably, the assembly also includes a transfer shaft disposed within the housing, wherein the first contact end face is perpendicular to the axial direction of the transfer shaft, and the second contact end face is parallel to the axial direction of the transfer shaft.
[0016] An engineering machine, comprising:
[0017] Chassis;
[0018] As described in any of the above, the transfer case, the case body and the case cover are fixed to the chassis.
[0019] Beneficial effects:
[0020] The transfer case provided by this utility model has a first fixing member and a second fixing member respectively on the case body and cover. The first fixing member and the second fixing member can jointly fix the gearbox. When the gearbox is installed, the first contact end face and the second contact end face are jointly attached to the gearbox, ensuring reliable contact between the transfer case and the gearbox, making the gearbox installation reliable and stable. In addition, when the gearbox is installed, a first lubricating oil hole is opened on the first contact end face, which is close to the side end face of the gearbox where the second lubricating oil hole is opened. The first lubricating hole and the second lubricating hole are in a mating and communicating position, so that the lubricating oil in the transfer case body can flow directly into the gearbox to lubricate the bearings and gears in the gearbox. This eliminates the need for external oil supply pipes, pipe joints and other accessories, reduces space occupation, effectively simplifies the overall connection structure, facilitates assembly and reduces costs.
[0021] The engineering machinery provided by this utility model includes the aforementioned transfer case. The gearbox can be directly fixed on the transfer case, and under the premise of ensuring the connection of the lubricating oil circuit, the external oil supply pipe, pipe joint and other accessories are eliminated, simplifying the overall structure, facilitating assembly and reducing space occupation. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the transfer case provided by this utility model;
[0023] Figure 2 This is a schematic diagram of the structure of the box lid provided by this utility model;
[0024] Figure 3 This is a partial schematic diagram of the first fixing part provided by this utility model from one perspective;
[0025] Figure 4 This is a partial schematic diagram of the first fixing part provided by this utility model from another perspective;
[0026] Figure 5 This is a partial schematic diagram of the gearbox provided by this utility model;
[0027] Figure 6 This is a partial cross-sectional schematic diagram of the second lubricating oil hole and the sealing ring provided by this utility model.
[0028] In the picture:
[0029] 1. Housing; 11. First fastener; 111. First mating end face; 112. First lubricating oil hole; 113. First mounting hole; 12. First reinforcing rib; 13. Sealing ring;
[0030] 2. Box cover; 21. Second fastener; 211. Second mating end face; 212. Second mounting hole; 22. Second reinforcing rib; 23. Weight reduction groove;
[0031] 3. Gearbox; 31. Second lubricating oil hole; 311. Groove; 32. First fixing hole. Detailed Implementation
[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0035] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0036] This embodiment provides a transfer case. (Refer to...) Figures 1 to 5As shown, the transfer case includes a housing 1 and a cover 2 that are interlocked, and also includes a first fixing member 11 and a second fixing member 21. The first fixing member 11 is used to fixally connect to the transmission 3. The first fixing member 11 is located on the housing 1 and has a first contact end face 111 for contacting the transmission 3. The first contact end face 111 has a first lubricating oil hole 112 communicating with the housing 1 and connecting with a second lubricating oil hole 31 on the transmission 3. The second fixing member 21 is used to fixally connect to the transmission 3. The second fixing member 11 is located on the cover 2 and has a second contact end face 211 for contacting the transmission 3. When the transfer case is connected to the gearbox 3, the first fixing member 11 and the second fixing member 21 are both fixedly connected to the gearbox 3, the first contact end face 111 and the second contact end face 211 are both in contact with the gearbox 3, and the first lubricating oil hole 112 is connected to the second lubricating oil hole 31 opened on the gearbox 3 so that the lubricating oil in the housing 1 can flow into the gearbox 3.
[0037] In this embodiment, the first fixing member 11 and the second fixing member 21 can jointly fix the gearbox 3. When the gearbox 3 is installed, the first contact end face 111 and the second contact end face 211 are jointly attached to the gearbox 3. The first contact end face 111 and the second contact end face 211 ensure reliable contact between the transfer case and the gearbox 3, making the gearbox 3 reliably and stably installed. In addition, when the gearbox 3 is installed in place, a first lubricating oil hole 112 is opened on the first contact end face 111, which is close to the side end face of the gearbox 3 where the second lubricating oil hole 31 is opened. The first lubricating hole and the second lubricating hole are in a mating and communicating position, thereby realizing that the lubricating oil in the transfer case 1 flows directly into the gearbox 3 to lubricate the bearings and gears in the gearbox 3, effectively ensuring the lubrication effect inside the gearbox 3 and ensuring the life of the bearings and gears in the gearbox 3. The setting of external oil supply pipes, pipe joints and other accessories is eliminated, reducing space occupation, effectively simplifying the overall connection structure, facilitating assembly and reducing costs.
[0038] In this embodiment, the transfer case includes a transfer shaft disposed within the housing 1. A first mating end face 111 is perpendicular to the axial direction of the transfer shaft, and a second mating end face 211 is parallel to the axial direction of the transfer shaft. By setting the first mating end face 111 and the second mating end face 211 in two different directions, when the gearbox 3 is installed in the transfer case, the two end faces of the gearbox 3 in different directions respectively mate with the first mating end face 111 and the second mating end face 211, thereby achieving positioning of the gearbox 3 and limiting its movement in two degrees of freedom, ensuring reliable and stable installation of the gearbox 3.
[0039] In this embodiment, reference is made to Figures 1 to 3As shown, a first reinforcing rib 12 is provided between the first fixing member 11 and the housing 1; a second reinforcing rib 22 is provided between the second fixing member 21 and the housing cover 2. The provision of the first reinforcing rib 12 and the second reinforcing rib 22 can ensure the connection strength between the housing 1 and the first fixing member 11 and between the housing 1 and the second fixing member 21, and ensure the reliability and effectiveness of the connection with the gearbox 3.
[0040] Optionally, the number of first reinforcing ribs 12 and second reinforcing ribs 22 are respectively arranged in multiples at intervals to further ensure the connection strength between the first fastener 11 and the second fastener 21.
[0041] In this embodiment, the housing 1, the first fixing member 11, and the first reinforcing rib 12 are integrally cast, and the housing cover 2, the second fixing member 21, and the second reinforcing rib 22 are also integrally cast. Integral casting is reliable and convenient to process, and reduces the use of external connectors such as screws and bolts.
[0042] Specifically, the first fixing member 11 has a first mounting hole 113, and the gearbox 3 has a first fixing hole 32. A first bolt passes through the first mounting hole 113 and is threaded into the first fixing hole 32. The second fixing member 21 has a second mounting hole 212, and the gearbox 3 has a second fixing hole. A second bolt passes through the second mounting hole 212 and is threaded into the second fixing hole. Specifically, multiple first mounting holes 113, first fixing holes 32, and first bolts are provided in a corresponding manner, and multiple second mounting holes 212, second fixing holes, and second bolts are provided in a corresponding manner to ensure reliable and effective fixing of the gearbox 3 to the transfer case housing 1 and the outer casing.
[0043] In this embodiment, there are four first mounting holes 113, the first fixing hole 32 is configured as an M16 threaded hole, the first bolt is an M16 bolt with a torque of 248±25 Nm. There are four second mounting holes 212, the second fixing hole is configured as an M16 threaded hole, the second bolt is an M16 bolt with a torque of 248±25 Nm.
[0044] In this embodiment, a first mounting hole 113 is provided between every two adjacent first reinforcing ribs 12; multiple second reinforcing ribs 22 are provided, and a second mounting hole 212 is provided between every two adjacent second reinforcing ribs 22. This arrangement ensures that the multiple first reinforcing ribs 12 are evenly distributed relative to the first mounting holes 113, and the multiple second reinforcing ribs 22 are evenly distributed relative to the second mounting holes 212, effectively balancing the forces on the first fixing member 11 and the second fixing member 21, ensuring reliable and stable connections between the first fixing member 11 and the housing 1, and between the second fixing member 21 and the housing cover 2.
[0045] In this embodiment, the first fixing member 11 and / or the second fixing member 21 are provided with weight-reducing grooves 23. Specifically, the weight-reducing grooves 23 are formed on the second fixing member 21, and the weight-reducing grooves 23 are set with an oblong structure, with one weight-reducing groove 23 between every two adjacent second reinforcing ribs 22. The presence of weight-reducing grooves 23 effectively reduces weight and achieves structural lightweighting.
[0046] In this embodiment, reference is made to Figure 4 , Figure 5 As shown, the shape of the first mating end face 111 is the same as that of the mating end face corresponding to the gearbox 3. This allows for effective positioning between the first mating end face 111 and the corresponding end face of the gearbox 3 during installation, ensuring that the first lubricating oil hole and the second lubricating oil hole 31 can be directly connected after positioning.
[0047] In this embodiment, both the first mating end face 111 and the second mating end face 211 are planar. Specifically, the first mating end face 111 and the second mating end face 211 are required to have a flatness of less than 0.04 and a surface roughness of less than Ra3.2.
[0048] In this embodiment, reference is made to Figure 5 , Figure 6 As shown, a sealing ring 13 is provided between the first lubricating oil hole 112 and the second lubricating oil hole 31. The sealing ring 13 can seal the gap between the first lubricating oil hole 112 and the second lubricating oil hole 31, preventing oil leakage at the mating position between the first lubricating oil hole 112 and the second lubricating oil hole 31. Specifically, the sealing ring 13 is set as an elastic sealing ring 13. When the first mating end face 111 is mated with the corresponding end face of the gearbox 3, the sealing ring 13 can undergo a certain deformation, effectively achieving a sealing effect while ensuring that no gaps appear between the first mating end face 111 and the corresponding end face of the gearbox 3.
[0049] Alternatively, the sealing ring 13 can be made of rubber.
[0050] Specifically, the gearbox 3 has a groove 311 on the outer edge of the second lubrication hole 31, and the sealing ring 13 is embedded in the groove 311. The groove 311 ensures that the sealing ring 13 is installed reliably and stably.
[0051] This embodiment also provides a piece of construction machinery. The construction machinery includes a chassis and the aforementioned transfer case, with the housing 1 and cover 2 fixed to the chassis. This construction machinery includes the aforementioned transfer case, and the gearbox 3 can be directly fixed to the transfer case. Furthermore, while ensuring the lubricating oil circuit remains connected, external oil pipes, pipe fittings, and other accessories are omitted, simplifying the overall structure, facilitating assembly, and reducing space occupation.
[0052] For example, construction machinery includes, but is not limited to, loaders, bulldozers, forklifts, etc.
[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A transfer case, comprising a case body (1) and a case cover (2) that are fastened together, characterized in that, The transfer case also includes: The first fixing member (11) is used to fix and connect with the gearbox (3). The first fixing member (11) is provided on the housing (1). The first fixing member (11) has a first contact end face (111). The first contact end face (111) is used to contact with the gearbox (3). The first contact end face (111) has a first lubricating oil hole (112) connected to the housing (1). The first lubricating oil hole (112) is used to connect with the second lubricating oil hole (31) opened on the gearbox (3). The second fixing member (21) is used to fix it to the gearbox (3). The second fixing member (21) is provided on the cover (2). The second fixing member (21) has a second contact end face (211) for contacting the gearbox (3).
2. The transfer case according to claim 1, characterized in that, A first reinforcing rib (12) is provided between the first fixing member (11) and the box body (1); a second reinforcing rib (22) is provided between the second fixing member (21) and the box cover (2).
3. The transfer case according to claim 2, characterized in that, The box body (1), the first fixing member (11), and the first reinforcing rib (12) are integrally cast; the box cover (2), the second fixing member (21), and the second reinforcing rib (22) are integrally cast.
4. The transfer case according to claim 2, characterized in that, The first fixing member (11) has a first mounting hole (113), the gearbox (3) has a first fixing hole (32), and the first bolt passes through the first mounting hole (113) and is threaded to the first fixing hole (32); the second fixing member (21) has a second mounting hole (212), the gearbox (3) has a second fixing hole, and the second bolt passes through the second mounting hole (212) and is threaded to the second fixing hole.
5. The transfer case according to claim 4, characterized in that, The number of first reinforcing ribs (12) is multiple, and a first mounting hole (113) is provided between every two adjacent first reinforcing ribs (12); the number of second reinforcing ribs (22) is multiple, and a second mounting hole (212) is provided between every two adjacent second reinforcing ribs (22).
6. The transfer case according to claim 1, characterized in that, The first fastener (11) and / or the second fastener (21) are provided with weight-reducing grooves (23).
7. The transfer case according to claim 1, characterized in that, A sealing ring (13) is provided between the first lubricating oil hole (112) and the second lubricating oil hole (31).
8. The transfer case according to claim 7, characterized in that, The gearbox (3) has a groove (311) on the outer edge of the second lubricating oil hole (31), and the sealing ring (13) is embedded in the groove (311).
9. The transfer case according to claim 1, characterized in that, It also includes a transfer shaft disposed within the housing (1), wherein the first mating end face (111) is perpendicular to the axial direction of the transfer shaft, and the second mating end face (211) is parallel to the axial direction of the transfer shaft.
10. An engineering machinery, characterized in that, include: Chassis; The transfer case as described in any one of claims 1-9, wherein the case body (1) and the case cover (2) are fixed to the chassis.