Single-turbine torque converter and engineering vehicle

Abstract

The utility model belongs to the technical field of hydraulic torque converters, and discloses a single-turbine torque converter and an engineering vehicle, the single-turbine torque converter comprises a box body, a turbine, an intermediate shaft, a sun gear assembly, a reverse gear assembly, a reverse gear clutch, a first gear assembly, a first gear clutch, a direct gear assembly, a direct gear clutch and an output shaft; the intermediate shaft is in transmission connection with the turbine; the sun gear assembly is sleeved on the intermediate shaft; the reverse gear assembly comprises a reverse gear planet carrier and a reverse gear planet wheel, and the reverse gear planet wheel is connected with the sun wheel assembly in an engaged mode. The first-gear assembly comprises a first-gear planet wheel, a first-gear planet carrier and a first-gear gear ring, the first-gear planet carrier is connected with the reverse-gear planet wheel in a meshed mode, and the first-gear planet wheel is connected between the sun wheel assembly and the first-gear gear ring in a meshed mode; the direct gear assembly is in transmission connection with the first-gear planet carrier; and the output shaft is in transmission connection with the direct gear assembly. The power output by the engine is transmitted through one turbine, the power transmission path is shortened, and the power transmission efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic torque converters, in particular to a single turbine torque converter and an engineering vehicle. Background Art

[0002] The dual-variable gearbox consists of a torque converter and a gearbox. The torque converter transmits power to the overrunning clutch through the input gear connecting the two turbines, and then achieves gear shifting through different clutch closures, and finally transmits power to the output shaft. The dual-variable gearbox has a large adjustable speed ratio range and can automatically adapt to load torque changes. It is widely used in engineering vehicles such as loaders.

[0003] However, the structure of the twin-turbine torque converter is relatively complex, with a large number of components and a long power transmission path. The power transmission efficiency is lower than that of the single-turbine torque converter, the structural dimensions are not compact, the space occupied is large, and the cost of use is high.

[0004] Therefore, there is an urgent need for a single turbine torque converter and an engineering vehicle to solve the above problems. Utility Model Content

[0005] One purpose of the utility model is to provide a single-turbine torque converter, which uses one turbine to transmit the power output by the engine, shortens the power transmission path, and improves the power transmission efficiency.

[0006] Another object of the utility model is to provide an engineering vehicle that adopts a single turbine torque converter to improve power transmission efficiency and reduce use costs.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] In a first aspect, a single turbine torque converter is provided, the single turbine torque converter comprising:

[0009] Box;

[0010] A turbine, drivingly connected to the output end of the engine;

[0011] An intermediate shaft is inserted into the housing and is drivingly connected to the turbine;

[0012] A sun gear assembly, sleeved on the circumference of the intermediate shaft;

[0013] A reverse gear assembly and a reverse gear clutch, wherein the reverse gear assembly comprises a reverse gear planet carrier and a reverse gear planetary gear, the reverse gear clutch is used to selectively mesh and fix the reverse gear planet carrier to the housing, and the reverse gear planetary gear is meshed and connected with the sun gear assembly;

[0014] A first gear assembly and a first gear clutch, the first gear assembly comprising a first gear planetary gear, a first gear planetary carrier and a first gear ring gear, the first gear clutch is used to selectively mesh and fix the first gear ring gear to the housing, the first gear planetary carrier is meshed and connected with the reverse gear planetary gear, the first gear planetary gear is rotatably arranged on the first gear planetary carrier and the first gear planetary gear is meshed and connected between the sun gear assembly and the first gear ring gear;

[0015] A direct gear assembly and a direct gear clutch, wherein the direct gear assembly is drivingly connected to the first gear planet carrier, and the direct gear clutch is used to selectively mesh and fix the direct gear assembly to the sun gear assembly;

[0016] The output shaft is drivingly connected to the direct gear assembly.

[0017] As an optional technical solution, the single-turbine torque converter also includes a pump wheel and a free guide wheel, the pump wheel is transmission-connected to the output end of the engine, and the free guide wheel is transmission-arranged between the pump wheel and the turbine.

[0018] As an optional technical solution, the turbine transmission is connected with a speed change gear, and the speed change gear transmission is arranged between the pump wheel and the speed change pump.

[0019] As an optional technical solution, the output shaft is coaxially arranged with the sun gear assembly.

[0020] As an optional technical solution, the rotation centerline of the output shaft is arranged parallel to the rotation centerline of the sun gear assembly.

[0021] As an optional technical solution, the distance between the rotation centerline of the reverse gear planetary gear and the rotation centerline of the sun gear assembly is equal to the distance between the rotation centerline of the first gear planetary gear and the rotation centerline of the sun gear assembly.

[0022] As an optional technical solution, the distance from the meshing position of the reverse gear planetary gear and the first gear planetary carrier to the rotation centerline of the sun gear assembly is equal to the distance from the meshing position of the first gear planetary gear and the first gear ring gear to the rotation centerline of the sun gear assembly.

[0023] As an optional technical solution, the number of the reverse gear planetary gears is multiple.

[0024] As an optional technical solution, the number of the first gear planetary gears is multiple.

[0025] In a second aspect, a construction vehicle is provided, the construction vehicle comprising the single turbine torque converter as described above.

[0026] The beneficial effects of the utility model are:

[0027] The utility model provides a single-turbine torque converter and an engineering vehicle. The single-turbine torque converter comprises a housing, a turbine, an intermediate shaft, a sun gear assembly, a reverse gear assembly, a reverse gear clutch, a first gear assembly, a first gear clutch, a direct gear assembly, a direct gear clutch and an output shaft. The reverse gear assembly comprises a reverse gear planet carrier and a reverse gear planetary wheel. The first gear assembly comprises a first gear planetary wheel, a first gear planet carrier and a first gear ring gear. When it is necessary to switch to a reverse gear state, the reverse gear clutch meshes and fixes the reverse gear planet carrier to the housing, the first gear clutch and the direct gear clutch are both released, and the power output from the output end of the engine passes through the turbine, the intermediate shaft, the sun gear assembly, the reverse gear planetary wheel, the first gear clutch and the direct gear clutch in sequence. The first gear clutch meshes and fixes the first gear ring gear to the housing, the reverse clutch and the direct gear clutch are both released, and the power output from the engine output end passes through the turbine, intermediate shaft, sun gear assembly, first gear planetary gear, first gear planetary carrier, direct gear assembly and output shaft in sequence; when it is necessary to switch to direct gear, the direct gear clutch meshes and fixes the direct gear assembly to the sun gear assembly, the reverse clutch and the first gear clutch are both released, and the power output from the engine output end passes through the turbine, intermediate shaft, sun gear assembly, direct gear assembly and output shaft in sequence. The single turbine torque converter of the utility model has a small number of components, a short power transmission path, and a high power transmission efficiency. The use cost of the engineering vehicle can be reduced by using the above single turbine torque converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The utility model is further described in detail below according to the accompanying drawings and embodiments;

[0029] Figure 1 The layout of the single turbine torque converter according to the embodiment Figure 1 ;

[0030] Figure 2 The layout of the single turbine torque converter according to the embodiment Figure 2 .

[0031] In the figure:

[0032] 1. Housing; 2. Turbine; 3. Intermediate shaft; 4. Sun gear assembly; 51. Reverse gear planetary carrier; 52. Reverse gear planetary wheel; 6. Reverse gear clutch; 71. First gear planetary wheel; 72. First gear planetary carrier; 73. First gear ring gear; 8. First gear clutch; 9. Direct gear assembly; 10. Direct gear clutch; 11. Output shaft; 12. Pump wheel; 13. Free guide wheel; 14. Speed ​​gear. DETAILED DESCRIPTION

[0033] In order to make the technical problems solved by the utility model, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the utility model will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0035] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0036] In the description of this article, it should be understood that the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0037] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0038] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0039] like Figure 1 and Figure 2 As shown, this embodiment provides a single turbine torque converter, which includes a housing 1, a turbine 2, an intermediate shaft 3, a sun gear assembly 4, a reverse gear assembly, a reverse gear clutch 6, a first gear assembly, a first gear clutch 8, a direct gear assembly 9, a direct gear clutch 10 and an output shaft 11; the turbine 2 is drivingly connected to the output end of the engine; the intermediate shaft 3 is inserted into the interior of the housing 1 and is drivingly connected to the turbine 2; the sun gear assembly 4 is sleeved on the periphery of the intermediate shaft 3; the reverse gear assembly includes a reverse gear planet carrier 51 and a reverse gear planetary wheel 52, and the reverse gear clutch 6 is used to selectively mesh and fix the reverse gear planet carrier 51 to the housing 1, and the reverse gear planetary wheel 52 is engaged with the reverse gear planetary wheel 52. The sun gear assembly 4 is meshed and connected; the first gear assembly includes a first gear planetary gear 71, a first gear planetary carrier 72 and a first gear ring gear 73, the first gear clutch 8 is used to selectively mesh and fix the first gear ring gear 73 to the housing 1, the first gear planetary carrier 72 is meshed and connected with the reverse gear planetary gear 52, the first gear planetary gear 71 is rotatably arranged on the first gear planetary carrier 72 and the first gear planetary gear 71 is meshed and connected between the sun gear assembly 4 and the first gear ring gear 73; the direct gear assembly 9 is transmission connected to the first gear planetary carrier 72, and the direct gear clutch 10 is used to selectively mesh and fix the direct gear assembly 9 to the sun gear assembly 4; the output shaft 11 is transmission connected to the direct gear assembly 9.

[0040] The planetary gear row consists of four parts, namely the sun gear, planet gear, planet carrier and ring gear. When the sun gear rotates, it can drive the planet gear to rotate. The planet gear rotates or revolves, which depends on which part the planet gear is fixedly connected to. For example, if the planet gear is fixedly connected to the planet carrier, when the sun gear rotates, the planet gear rotates and does not revolve. At this time, the ring gear rotates, and the sun gear and the ring gear rotate in opposite directions. If the planet gear is fixedly connected to the ring gear, when the sun gear rotates, the planet gear rotates and revolves. At this time, the ring gear is fixed, and the sun gear and the planet carrier rotate in the same direction.

[0041] In this embodiment, both the first gear assembly and the reverse gear assembly are planetary gear sets, and the first gear planet carrier 72 in the first gear assembly is used as the ring gear of the reverse gear assembly.

[0042] When it is necessary to switch to the reverse gear state, the reverse gear clutch 6 meshes and fixes the reverse gear planetary carrier 51 to the housing 1, and the first gear clutch 8 and the direct gear clutch 10 are both released, and the power output from the engine output end passes through the turbine 2, the intermediate shaft 3, the sun gear assembly 4, the reverse gear planetary gear 52, the first gear planetary carrier 72, the direct gear assembly 9 and the output shaft 11 in sequence; in the reverse gear state, the reverse gear planetary carrier 51 is fixedly connected to the housing 1, the reverse gear planetary gear 52 rotates on its own and does not revolve, and the rotation direction of the reverse gear planetary gear 52 is opposite to that of the first gear planetary carrier 72, that is, reverse gear is achieved, because the first gear planetary gear 71 is meshed and connected with the sun gear assembly 4, therefore, the first gear planetary gear 71 also rotates at this time, but the first gear clutch 8 is in a released state, and the first gear ring gear 73 is not fixed to the housing 1, so the first gear ring gear 73 and the first gear planetary gear 71 are both idling, and neither of them participates in the power transmission of the reverse gear state.

[0043] When it is necessary to switch to the first gear state, the first gear clutch 8 meshes and fixes the first gear ring gear 73 to the housing 1, and the reverse gear clutch 6 and the direct gear clutch 10 are both released. The power output from the output end of the engine passes through the turbine 2, the intermediate shaft 3, the sun gear assembly 4, the first gear planetary gear 71, the first gear planetary carrier 72, the direct gear assembly 9 and the output shaft 11 in sequence; in the first gear state, the first gear ring gear 73 is fixed to the housing 1. Since the first gear planetary gear 71 is meshed and connected with the sun gear assembly 4, the first gear planetary gear 71 rotates and revolves, and the first gear planetary gear 71 can drive the first gear planetary carrier 72, thereby realizing power transmission in the first gear state. At this time, the reverse gear planetary carrier 51 is not fixed to the housing 1, so the reverse gear planetary gear 52 and the reverse gear planetary carrier 51 are both idling, and neither of them participates in the power transmission in the first gear state.

[0044] When it is necessary to switch to the direct gear, the direct gear clutch 10 engages and fixes the direct gear assembly 9 to the sun gear assembly 4, the reverse gear clutch 6 and the first gear clutch 8 are both released, and the power output from the engine output end passes through the turbine 2, the intermediate shaft 3, the sun gear assembly 4, the direct gear assembly 9 and the output shaft 11 in sequence; in the direct gear state, the first gear ring gear 73, the first gear planetary gear 71, the first gear planetary carrier 72, the reverse gear planetary carrier 51, and the reverse gear planetary gear 52 are all idling and do not participate in the power transmission in the direct gear state.

[0045] Compared with the twin-turbo 2 torque converter, the single-turbo torque converter of this embodiment eliminates the first-stage turbine 2, the overrunning clutch, the input gear, the power take-off gear, and the gearbox input gear. It has a small number of components, a short power transmission path for each gear, and a high power transmission efficiency. Engineering vehicles using the above single-turbo torque converter can reduce their operating costs.

[0046] Optionally, the output shaft 11 is transmission-connected to the direct gear assembly 9 via a gear.

[0047] This embodiment adopts a dry structure design at the turbine 2 to prevent the oil inside the casing 1 from leaking into the interior of the engine.

[0048] Optionally, the single-turbine torque converter further includes a pump wheel 12 and a free guide wheel 13 , wherein the pump wheel 12 is transmission-connected to the output end of the engine, and the free guide wheel 13 is transmission-disposed between the pump wheel 12 and the turbine 2 .

[0049] The single-turbine torque converter stores oil inside. The engine output power drives the pump wheel 12, and the pump wheel 12 drives the oil to rotate. The oil is affected by the rotating centrifugal force and passes through the turbine 2. The turbine 2 changes the flow direction of the oil, and then passes through the free guide wheel 13 to increase the angle and return to the pump wheel 12. The cycle is repeated and finally reaches a balance. In the above process, the single-turbine torque converter increases the torque and transmits it to the gearbox through the intermediate shaft 3.

[0050] Optionally, the turbine 2 is drivingly connected to a speed gear 14, and the speed gear 14 is drivingly arranged between the pump wheel 12 and the speed pump.

[0051] like Figure 1 As shown, in this embodiment, the output shaft 11 is coaxially arranged with the sun gear assembly 4, the structure is compact, the power transmission path is shortened, and the transmission efficiency is improved.

[0052] like Figure 2 As shown, in some other embodiments, the rotation centerline of the output shaft 11 is arranged parallel to the rotation centerline of the sun gear assembly 4 .

[0053] Optionally, the distance between the rotation centerline of the reverse gear planetary gear 52 and the rotation centerline of the sun gear assembly 4 is equal to the distance between the rotation centerline of the first gear planetary gear 71 and the rotation centerline of the sun gear assembly 4 .

[0054] Optionally, the distance from the meshing position of the reverse gear planetary gear 52 and the first gear planetary carrier 72 to the rotation centerline of the sun gear assembly 4 is equal to the distance from the meshing position of the first gear planetary gear 71 and the first gear ring gear 73 to the rotation centerline of the sun gear assembly 4.

[0055] Make the gears of the reverse gear assembly and the first gear assembly evenly loaded, avoid excessive radial force on the gears and shaft system, and reduce working noise.

[0056] Optionally, there are multiple reverse planetary gears 52 .

[0057] Optionally, there are multiple first gear planetary gears 71 .

[0058] This embodiment also provides an engineering vehicle, which includes the single turbine torque converter as described above.

[0059] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. Single turbine torque converter, characterized in that: include: Box body (1); A turbine (2) drivingly connected to an output end of the engine; An intermediate shaft (3) is inserted into the casing (1) and is drivingly connected to the turbine (2); A sun gear assembly (4) sleeved on the circumference of the intermediate shaft (3); A reverse gear assembly and a reverse gear clutch (6), wherein the reverse gear assembly comprises a reverse gear planet carrier (51) and a reverse gear planetary wheel (52), wherein the reverse gear clutch (6) is used to selectively mesh and fix the reverse gear planet carrier (51) to the housing (1), and the reverse gear planetary wheel (52) is meshed and connected to the sun gear assembly (4); A first gear assembly and a first gear clutch (8), the first gear assembly comprising a first gear planetary gear (71), a first gear planetary carrier (72) and a first gear ring gear (73), the first gear clutch (8) being used to selectively mesh and fix the first gear ring gear (73) to the housing (1), the first gear planetary carrier (72) being meshed and connected with the reverse gear planetary gear (52), the first gear planetary gear (71) being rotatably arranged on the first gear planetary carrier (72) and the first gear planetary gear (71) being meshed and connected between the sun gear assembly (4) and the first gear ring gear (73); A direct gear assembly (9) and a direct gear clutch (10), wherein the direct gear assembly (9) is drivingly connected to the first gear planet carrier (72), and the direct gear clutch (10) is used to selectively mesh and fix the direct gear assembly (9) to the sun gear assembly (4); The output shaft (11) is drivingly connected to the direct gear assembly (9).

2. The single turbine torque converter according to claim 1, characterized in that: The single turbine torque converter further comprises a pump wheel (12) and a free guide wheel (13), wherein the pump wheel (12) is drivingly connected to the output end of the engine, and the free guide wheel (13) is drivingly arranged between the pump wheel (12) and the turbine (2).

3. The single turbine torque converter according to claim 2, characterized in that: The turbine (2) is drivingly connected to a speed change gear (14), and the speed change gear (14) is drivingly arranged between the pump wheel (12) and the speed change pump.

4. The single turbine torque converter according to claim 1, characterized in that: The output shaft (11) is coaxially arranged with the sun gear assembly (4).

5. The single turbine torque converter according to claim 1, characterized in that: The rotation center line of the output shaft (11) is arranged parallel to the rotation center line of the sun gear assembly (4).

6. The single turbine torque converter according to claim 1, characterized in that: The distance between the rotation center line of the reverse gear planetary gear (52) and the rotation center line of the sun gear assembly (4) is equal to the distance between the rotation center line of the first gear planetary gear (71) and the rotation center line of the sun gear assembly (4).

7. The single turbine torque converter according to claim 6, characterized in that: The distance from the meshing position of the reverse gear planetary gear (52) and the first gear planetary carrier (72) to the rotation center line of the sun gear assembly (4) is equal to the distance from the meshing position of the first gear planetary gear (71) and the first gear ring gear (73) to the rotation center line of the sun gear assembly (4).

8. The single turbine torque converter according to claim 1, characterized in that: The reverse gear planetary gear (52) is provided in plurality.

9. The single turbine torque converter according to claim 1, characterized in that: The first gear planetary gear (71) is provided in plurality.

10. An engineering vehicle, characterized in that: The engineering vehicle comprises a single turbine torque converter as claimed in any one of claims 1-9.

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