Anti-driving-row transmission structure of wet-proof clutch

Abstract

The utility model discloses a transmission structure capable of preventing a wet clutch from driving. The transmission structure comprises a box body, a transmission shaft, a gear, a first clutch and a second clutch, the transmission shaft is rotatably mounted on the box body, the gear sleeves the transmission shaft and is rotatably mounted on the transmission shaft, the gear and the transmission shaft are in transmission connection through the first clutch, and the transmission shaft can be connected with the box body through the first clutch and the second clutch; the first clutch comprises a push plate connected with the transmission shaft; the second clutch comprises a second piston connected with the box body, the right end of the push plate is provided with first outer teeth in a protruding mode, and the left end of the second piston is provided with second outer teeth in a protruding mode; during braking, the first clutch does not work, and first outer teeth of the push plate are connected with second outer teeth of the second piston, so that the transmission shaft, the spline housing, the push plate, the second piston and the box body are connected; during transmission, the first clutch works, the push plate is separated from the second piston, and power can be output from the transmission shaft. By means of the arrangement, the belt row effect between the gear and the transmission shaft can be effectively prevented.

Description

Technical Field

[0001] The utility model relates to the field of transmission structures, in particular to a transmission structure with wet clutch anti-slip function. Background Art

[0002] When the wet clutch is in the disengaged state, the driving and driven friction elements should be completely separated, not in contact with each other, and not transmitting torque. However, due to various reasons, in the disengaged state of the wet clutch, part of the power can still be output to the outside through the belt effect.

[0003] The prior art with publication number CN205173420U discloses a belt-displacement-proof power output device for a tractor, which comprises a shell fixed to a main gearbox body by bolts, an input gear fixed to an output shaft of the main case body by splines is arranged in the shell, a transmission gear meshing with the input gear is installed on a clutch shaft of the power output device through a bearing, the gear has an external spline, which cooperates with the spline of an inner friction plate of the clutch; a clutch installed on the clutch shaft of the power output device, whose outer friction plate cooperates with the clutch shell by splines; a piston driven by pressure oil is arranged on at least one side of the inner friction plate and the outer friction plate, and can make the inner friction plate and the outer friction plate be in two states of being compressed or disengaged under the action of a configured spring; the clutch shell is connected to the clutch shaft by an internal spline, and an output flange for power transmission is connected to the output end of the clutch shaft.

[0004] In the prior art, both the brake and the clutch are wet clutches. The clutch between the gear and the shaft will produce a belt-displacement effect. Similarly, the brake between the housing and the shaft will also produce a belt-displacement effect. Therefore, the brake in the prior art will also affect the transmission efficiency or braking effect of the mechanism. Utility Model Content

[0005] In order to solve the problem in the prior art that the clutch of the embodiment affects the transmission efficiency and transmission accuracy of the transmission mechanism, the purpose of the utility model is to provide a transmission structure with a wet clutch and anti-belt displacement effect, which can effectively prevent the occurrence of the belt displacement effect and effectively improve the transmission efficiency and transmission accuracy.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: a transmission structure with wet clutch anti-slip, including a housing, a transmission shaft, a gear, a first clutch and a second clutch; the transmission shaft is rotatably mounted on the housing, the gear is sleeved and rotatably mounted on the transmission shaft, the gear and the transmission shaft are connected through the first clutch, and the transmission shaft can be connected to the housing through the first clutch and the second clutch; the first clutch includes a clutch housing, a friction plate group, a spline sleeve, a first piston, a push plate and a first elastic member; the clutch housing is fixedly connected to the gear, the clutch housing, the friction plate group, the spline sleeve, the first piston and the push plate are all sleeved on the transmission shaft, the spline sleeve and the transmission shaft are fixedly connected, the friction plate group, the spline sleeve and the first piston are all arranged in the clutch housing; the friction plate group is sleeved on the spline sleeve, and a plurality of outer friction plates and a plurality of inner friction plates in the friction plate group are alternately arranged, A plurality of outer friction plates in the friction plate group are spline-connected to the clutch housing, and a plurality of inner friction plates in the friction plate group are spline-connected to the spline sleeve; a push plate sleeve is provided on the spline sleeve and the first piston, the push plate is fixedly connected to the first piston, the push plate and the spline sleeve are spline-matched, and the first piston can drive the push plate to drive the outer friction plates and the inner friction plates in the friction plate group to connect; a first elastic member is provided between the spline sleeve and the first piston, and the first elastic member is used to drive the spline sleeve and the first piston to separate;

[0007] The second clutch comprises a second piston, the second piston is sleeved on the transmission shaft, the second piston is connected to the box body and can move axially;

[0008] The right end of the push plate is protruded with a first external tooth, and the left end of the second piston is protruded with a second external tooth;

[0009] During braking, the first outer teeth of the push plate are connected with the second outer teeth of the second piston, so that the transmission shaft, the spline sleeve, the push plate, the second piston and the housing are connected;

[0010] During transmission, the push plate and the second piston are separated, and the power can be output through the gear, the first clutch and the transmission shaft.

[0011] Preferably, the gear and the clutch housing are fixedly connected or integrally formed.

[0012] Preferably, the first piston is clearance-matched with the transmission shaft.

[0013] Preferably, the gear is mounted on the transmission shaft through two sets of axially arranged first bearings; the transmission shaft is mounted on the housing through second bearings and third bearings, and the gear and the first clutch are located between the second bearings and the third bearings.

[0014] Preferably, a plurality of slots are provided on the box body, a plurality of latching protrusions are protruded from the right end of the second piston, the plurality of latching protrusions correspond to the plurality of slots one by one, and the latching protrusions are plugged into and slidably matched with the slots.

[0015] Preferably, a first opening is provided at the right end of the first piston, a first baffle is provided in the first opening, the first baffle is sleeved on the transmission shaft, and the first baffle is tightly fitted with the transmission shaft; a first oil chamber is provided between the first baffle and the first piston, and a first oil channel connected to the first oil chamber is provided on the transmission shaft.

[0016] Preferably, the second clutch also includes an oil cylinder, which is fixed on the housing, and the second piston is slidably matched with the oil cylinder, and one end of the second piston provided with external teeth extends out of the oil cylinder; a second oil chamber is provided between the oil cylinder and the second piston; and a second elastic member for driving the second piston to slide is also provided in the oil cylinder.

[0017] Preferably, a second oil passage communicating with the second oil chamber is provided on the box body.

[0018] Preferably, a second opening is provided on the right end face of the oil cylinder, an oil chamber portion is protruded on the second piston, the oil chamber portion is located in the second opening of the oil cylinder, and the inner wall of the second opening, the second piston and the oil cylinder portion enclose the second oil chamber.

[0019] Preferably, the second elastic member is arranged between the oil chamber portion and the box body.

[0020] The beneficial effects of the technical solution of the utility model are as follows: the above solution prevents the gear power from being transmitted to the transmission shaft through the belt effect of the friction plate group when the friction plate group is not engaged, causing power output of the transmission shaft, thereby preventing wet clutch belt stripping; and in the above solution, the second clutch and the push plate are braked only by external tooth engagement, so there is no condition for the belt effect to occur between the second clutch and the transmission shaft, thereby effectively improving the transmission efficiency and transmission accuracy; and the above solution has a simpler structure and is highly reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the transmission structure in the oil-free state;

[0022] Figure 2 It is a schematic diagram of the transmission structure in the oil-filled state;

[0023] Figure 3 It is a structural schematic diagram of the push plate;

[0024] Figure 4 It is a schematic diagram of the structure of the second piston.

[0025] Figure numerals: 1, transmission shaft; 2, gear; 3, friction plate group; 4, spline sleeve; 5, first piston; 6, push plate; 7, housing; 8, cylinder; 9, second piston; 10, second elastic member; 11, second elastic member; 12, first baffle; 13, second bearing; 14, first bearing; 15, third bearing; 16, first external tooth; 17, second external tooth; 18, oil chamber; 19, cam. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments 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 be used to explain the present invention, and should not be construed as limiting the present invention.

[0027] 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 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.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0029] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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 it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] 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.

[0031] The following embodiments are described in Figure 1 The following shall prevail. Figure 1 In the diagram, the position of the second bearing is called “left” or “left side”, the position of the third bearing is called “right” or “right side”, and the left and right direction is called “axial direction”. Example

[0032] like Figures 1 to 4 The transmission structure with wet clutch anti-slipping function shown includes a housing 7, a transmission shaft 1, a gear 2, a first clutch and a second clutch; the transmission shaft 1 is rotatably mounted on the housing 7, the gear 2 is sleeved and rotatably mounted on the transmission shaft 1, the gear 2 and the transmission shaft 1 are connected by the first clutch, and the transmission shaft 1 can be connected to the housing 7 through the first clutch and the second clutch;

[0033] The first clutch comprises a clutch housing, a friction plate group 3, a spline sleeve 4, a first piston 5, a first elastic member 10 and a push plate 6; the clutch housing, the friction plate group 3, the spline sleeve 4, the first piston 5 and the push plate 6 are all sleeved on the transmission shaft 1, the spline sleeve 4 is fixedly connected to the transmission shaft 1, the friction plate group 3, the spline sleeve 4 and the first piston 5 are all arranged in the clutch housing; the friction plate group 3 is sleeved on the spline sleeve, and the multiple outer friction plates and the multiple inner friction plates in the friction plate group 3 are alternately arranged, the multiple outer friction plates in the friction plate group 3 are splined to the clutch housing, and the multiple inner friction plates in the friction plate group 3 are splined to the spline sleeve; the push plate 6 is sleeved on the spline sleeve 4 and the first piston 5, the push plate 6 is splined with the spline sleeve 4, the push plate 6 is fixedly connected to the first piston 5, and the first piston 5 can drive the push plate to drive the outer friction plates and the inner friction plates in the friction plate group 3 to connect; the first elastic member 10 is arranged between the spline sleeve and the first piston 5, and the first elastic member 10 is used to drive the spline sleeve and the first piston 5 to separate;

[0034] The second clutch comprises a second piston 9, which is sleeved on the transmission shaft 1 and connected to the housing 7 and can move axially; a first external tooth 16 is protruded on the right end surface of the push plate 6, and a second external tooth 17 is protruded on the left end surface of the second piston 9;

[0035] During braking, the first outer teeth 16 of the push plate 6 are connected with the second outer teeth 17 of the second piston 9, so that the transmission shaft 1, the spline sleeve, the push plate 6, the second piston 9 and the housing 7 are connected in sequence; during transmission, the push plate 6 and the second piston 9 are separated, the first clutch works, and the power can be output after passing through the gear 2, the first clutch and the transmission shaft 1.

[0036] In this way, the above scheme prevents the power of the gear 2 from being transmitted to the transmission shaft 1 through the belt effect of the friction plate group 3 when the friction plate group 3 is not engaged, causing the transmission shaft 1 to have power output, thereby preventing the wet clutch from belting; and in the above scheme, the second clutch and the push plate 6 are braked only by the external tooth engagement, so there is no condition for the second clutch and the transmission shaft 1 to produce a belt effect, thereby effectively improving the transmission efficiency and transmission accuracy; and the structure of the above scheme is simpler and has the characteristics of high reliability.

[0037] In this embodiment, the gear 2 is mounted on the transmission shaft 1 through two sets of axially arranged first bearings 14; the transmission shaft 1 is mounted on the housing 7 through the second bearing 13 and the third bearing 15, and the gear 2 and the first clutch are located between the second bearing 13 and the third bearing 15.

[0038] In this embodiment, the gear 2 and the clutch housing are fixedly connected or integrally formed, which facilitates the assembly and positioning of the transmission mechanism.

[0039] like Figure 1 and Figure 2 As shown, in this embodiment, a first opening is provided at the right end of the first piston 5, a first baffle 12 is provided in the first opening, the first baffle 12 is sleeved on the transmission shaft 1, and the first baffle 12 is tightly fitted with the transmission shaft 1; a first oil chamber is provided between the first baffle 12 and the first piston 5, and a first oil channel connected to the first oil chamber is provided on the transmission shaft 1.

[0040] Furthermore, the inner wall of the first opening, the transmission shaft 1 and the first baffle 12 enclose a first oil chamber. Furthermore, a sealing structure is provided between the first opening and the first baffle 12, and the sealing structure includes a labyrinth seal, an oil seal or a sealing ring seal.

[0041] Furthermore, the first piston 5 is clearance-matched with the transmission shaft 1. Such an arrangement can control the temperature of the transmission shaft 1 and various components connected thereto, and improve the transmission efficiency of the transmission shaft 1.

[0042] like Figure 1 and Figure 2 As shown, in this embodiment, a second baffle is further provided on the spline sleeve, and the friction plate group 3 is provided between the second baffle and the push plate 6.

[0043] like Figure 1 and Figure 2As shown, in this embodiment, the right end of the spline sleeve is provided with a third opening, and the left end of the first piston 5 extends into the third opening; the first elastic member 10 is provided in the third opening, and the two ends of the first elastic member 10 respectively abut against the spline sleeve and the first piston 5. Further, the first elastic member 10 includes a spring.

[0044] like Figure 1 and Figure 2 As shown, in this embodiment, the second clutch also includes an oil cylinder 8, which is fixed on the box body 7, and the second piston 9 is slidably matched with the oil cylinder 8. One end of the second piston 9 provided with external teeth extends out of the oil cylinder 8; a second oil chamber is provided between the oil cylinder 8 and the second piston 9; and a second elastic member 11 for driving the second piston 9 to move is also provided in the oil cylinder 8. Such a configuration can improve the position accuracy of the second piston 9 and the transmission shaft 1, and prevent the second clutch from producing a belt displacement.

[0045] like Figure 1 , Figure 2 and Figure 4 As shown, further, the right end face of the oil cylinder 8 is provided with a second opening, and an oil cavity portion 18 is protruded on the second piston 9, and the oil cavity portion 18 is located in the second opening of the oil cylinder 8. The inner wall of the second opening, the second piston 9 and the oil cylinder 8 form a second oil cavity. A sealing structure is provided between the oil cavity portion 18 and the inner wall of the second opening, and the sealing structure includes a labyrinth seal, an oil seal or a sealing ring seal.

[0046] Furthermore, the second elastic member 11 is disposed between the oil chamber 18 and the housing 7, and two ends of the second elastic member 11 respectively abut against the oil chamber 18 and the housing 7. The second elastic member 11 is a disc spring; the disc spring is sleeved on the second piston 9.

[0047] like Figure 1 and Figure 2 As shown, in this embodiment, a receiving portion is protruded from the box body, the transmission shaft passes through the inner side of the receiving portion, the third bearing is arranged between the receiving portion and the transmission shaft, and the second piston sleeve is arranged on the receiving portion.

[0048] like Figure 1 and Figure 2 As shown, in this embodiment, a plurality of slots are provided on the inner wall of the box body 7, and a plurality of latching protrusions 19 are protruded from the right end of the second piston 9. The plurality of latching protrusions 19 correspond to the plurality of slots one by one, and the latching protrusions 19 are plugged into and slidably matched with the slots.

[0049] like Figure 1 and Figure 2 As shown, in this embodiment, the first oil passage is connected to the second oil passage. Such an arrangement can achieve synchronous control of the first clutch and the second clutch, thereby improving the control accuracy and transmission accuracy of the transmission mechanism.

[0050] The transmission mode of the above transmission mechanism is as follows:

[0051] like Figure 1 As shown, when the first oil chamber and the second oil chamber are not filled with oil, the push plate 6 and the second piston 9 are meshed through external teeth under the action of the spring and the torsion spring, so that the box 7, the second piston 9, the push plate 6, the spline sleeve, the transmission shaft 1 and the first piston 5 are connected, and the rotational freedom of the transmission shaft 1 is fixed, so the transmission shaft 1 will not have any power output, that is, the wet clutch anti-slip function is realized. In this way, when the vehicle is turned off, since the rotational freedom of the transmission shaft 1 is limited, even if the vehicle is parked on a slope, the torque of the vehicle tire is locked when it is transmitted to the transmission shaft 11, so that the vehicle cannot slide down the slope, that is, the structure has a parking brake function.

[0052] like Figure 2 As shown, when the first oil chamber and the second oil chamber are filled with oil, the first piston 5 drives the push plate 6 to approach the friction plate group 3, the first piston 5 moves away from the second piston 9, and the spring is compressed; at the same time, the oil entering the second oil chamber pushes the second piston 9 to move right and separate from the first piston 5, and the disc spring is compressed; then the first piston 5 and the second piston 9 separate, the friction plate group 3 is compressed, and the power of the gear 2 is output through the clutch housing, the friction plate group 3, the spline sleeve and the transmission shaft 1 in sequence. Among them, the second clutch has no interference with the transmission shaft 1.

[0053] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" 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. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0054] 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 the 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 wet-proof clutch anti-slip transmission structure, comprising a housing (7), a transmission shaft (1), a gear (2), a first clutch and a second clutch; the transmission shaft (1) is rotatably mounted on the housing (7), the gear (2) is sleeved and rotatably mounted on the transmission shaft (1), the gear (2) and the transmission shaft (1) are transmission-connected via the first clutch, and the transmission shaft (1) can be connected to the housing (7) via the first clutch and the second clutch; the characteristics are: The first clutch comprises a clutch housing, a friction plate group (3), a spline sleeve (4), a first piston (5), a push plate (6) and a first elastic member (10); the clutch housing is fixedly connected to the gear; the clutch housing, the friction plate group (3), the spline sleeve (4), the first piston (5) and the push plate (6) are all sleeved on the transmission shaft (1); the spline sleeve (4) and the transmission shaft (1) are fixedly connected; the friction plate group (3), the spline sleeve (4) and the first piston (5) are all arranged in the clutch housing; the friction plate group (3) is sleeved on the spline sleeve (4); a plurality of outer friction plates and a plurality of inner friction plates in the friction plate group (3) are alternately arranged; A plurality of outer friction plates in the friction plate group (3) are spline-connected to the clutch housing, and a plurality of inner friction plates in the friction plate group (3) are spline-connected to the spline sleeve (4); a push plate (6) is sleeved on the spline sleeve (4) and the first piston (5); the push plate (6) is fixedly connected to the first piston (5); the push plate (6) and the spline sleeve (4) are spline-matched; the first piston (5) can drive the push plate (6) to drive the outer friction plates and the inner friction plates in the friction plate group (3) to contact each other; a first elastic member (10) is arranged between the spline sleeve (4) and the first piston (5); the first elastic member (10) is used to drive the spline sleeve (4) and the first piston (5) to separate; The second clutch comprises a second piston (9), the second piston (9) is sleeved on the transmission shaft (1), and the second piston (9) is connected to the housing (7) and is capable of axial movement; A first external tooth (16) is protruded from the right end of the push plate (6), and a second external tooth (17) is protruded from the left end of the second piston (9); During braking, the first external teeth (16) of the push plate (6) are connected to the second external teeth (17) of the second piston (9), so that the transmission shaft (1), the spline sleeve (4), the push plate (6), the second piston (9) and the housing (7) are connected; During transmission, the push plate (6) and the second piston (9) are separated, and power can be output through the gear (2), the first clutch and the transmission shaft (1).

2. The anti-wet clutch anti-slip transmission structure according to claim 1, characterized in that: The gear (2) and the clutch housing are fixedly connected or integrally formed.

3. The anti-wet clutch anti-slip transmission structure according to claim 1, characterized in that: The first piston (5) is clearance-matched with the transmission shaft (1).

4. The anti-wet clutch anti-slip transmission structure according to claim 1, characterized in that: The gear (2) is mounted on the transmission shaft (1) via two sets of axially arranged first bearings (14); the transmission shaft (1) is mounted on the housing (7) via a second bearing (13) and a third bearing (15); the gear (2) and the first clutch are located between the second bearing (13) and the third bearing (15).

5. The anti-wet clutch anti-slip transmission structure according to claim 1, characterized in that: The box body (7) is provided with a plurality of slots, and the right end of the second piston (9) is protruded with a plurality of latching protrusions (19). The plurality of latching protrusions (19) correspond to the plurality of slots one by one, and the latching protrusions (19) are plugged into and slidably matched with the slots.

6. The anti-wet clutch anti-slip transmission structure according to claim 1, characterized in that: A first opening is provided at the right end of the first piston (5), a first baffle (12) is provided in the first opening, the first baffle (12) is sleeved on the transmission shaft (1), and the first baffle (12) and the transmission shaft (1) are tightly matched; a first oil chamber is provided between the first baffle (12) and the first piston (5), and a first oil passage communicating with the first oil chamber is provided on the transmission shaft (1).

7. The anti-wet clutch anti-slip transmission structure according to claim 1, characterized in that: The second clutch also includes an oil cylinder (8), the oil cylinder (8) being fixed on the housing (7), the second piston (9) being slidably matched with the oil cylinder (8), and one end of the second piston (9) being provided with external teeth extending out of the oil cylinder (8); a second oil chamber being provided between the oil cylinder (8) and the second piston (9); and a second elastic member (11) for driving the second piston (9) to slide is also provided in the oil cylinder (8).

8. The anti-wet clutch anti-slip transmission structure according to claim 7, characterized in that: The box body (7) is provided with a second oil passage connected to the second oil chamber.

9. The anti-wet clutch anti-slip transmission structure according to claim 7, characterized in that: A second opening is provided on the right end surface of the oil cylinder (8); an oil chamber portion (18) is protruded from the second piston (9); the oil chamber portion (18) is located in the second opening of the oil cylinder (8); and the inner wall of the second opening, the second piston (9) and the oil cylinder (8) form a second oil chamber.

10. The anti-wet clutch anti-slip transmission structure according to claim 7, characterized in that: The second elastic member (11) is arranged between the oil chamber portion (18) and the box body (7).

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