CN215928199U

CN215928199U - Power output wet clutch with automatic braking function

Info

Publication number: CN215928199U
Application number: CN202121956068.9U
Authority: CN
Inventors: 王富凯; 杨桂香; 何明斐; 柴景阳; 董文华; 鞠超; 高辽远; 金鑫
Original assignee: First Tractor Co Ltd
Current assignee: First Tractor Co Ltd
Priority date: 2021-08-19
Filing date: 2021-08-19
Publication date: 2022-03-01
Anticipated expiration: 2031-08-19

Abstract

The utility model provides a take power take off wet clutch of automatic braking function, including the casing that is equipped with the output shaft, coaxial driven gear who is equipped with driving gear shaft engaged with on the output shaft, be equipped with the clutch hub who takes the nip area on the driven gear, be equipped with the piston cylinder on the output shaft and set up the brake seat between piston cylinder and shells inner wall, be equipped with the piston of fixing on the casing in the piston cylinder, the piston, the airtight cavity of intercommunication output shaft inner oil duct is enclosed into to output shaft and piston cylinder, the one end butt nip area of piston cylinder is when airtight cavity oil feed pressurization, along friction disc and the steel sheet in the clutch hub of output shaft axial displacement compression, be equipped with the elastomeric element along output shaft axial setting between piston cylinder and the output shaft, the other end butt brake seat of piston cylinder is used for airtight cavity pressure release, compress tightly the brake seat under elastomeric element's effect. Compared with the existing wet clutch, the clutch has the advantages of simple structure and low cost.

Description

Power output wet clutch with automatic braking function

Technical Field

The utility model relates to the technical field of tractors, in particular to a power output wet clutch with an automatic braking function.

Background

When a tractor turns around on the ground in power output operation, the tractor needs to lift the machine, and generally needs to separate a power output clutch to ensure safety. Because drag torque exists between the friction plate and the steel sheet of the wet clutch, after separation, the power output shaft head can also rotate under the drag torque, so that the wet clutch has certain potential safety hazard, therefore, the power output wet clutch has a braking structure, and the output shaft head can be stopped quickly after power is cut off.

In the existing wet clutch with a brake structure, when braking, the brake is usually realized by adopting a hydraulic compression mode or a spring compression mode, the hydraulic compression not only needs a brake friction plate, but also needs an independent control oil way, the control system is complex and has high cost, the spring compression does not need an independent control oil way, but still needs the brake friction plate, and the manufacturing cost is still low, in addition, when the brake function is realized, the brake structure adopted by the existing wet clutch is that after braking, a power output shaft is generally difficult to rotate, which is not beneficial to hanging of tools after braking, for example, CN201920224073.7 discloses a novel wet clutch output structure and a tractor, which does not need a brake oil way, a brake spring and a wet clutch return spring share one, the brake friction plate is compressed by the return spring to realize the function of a brake shaft head, the brake friction plate still exists, the cost is high, and after power is cut off, the output shaft can not rotate, which is not beneficial to the hanging connection of the machine tool.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a power output wet clutch with an automatic braking function, which is simple in structure and low in cost.

The technical scheme adopted by the utility model to achieve the aim is as follows:

a power output wet clutch with an automatic braking function comprises a shell, an output shaft with one end extending out of the shell is rotatably arranged in the shell, a driven gear which is positioned in the shell and is engaged with a driving gear shaft arranged on the shell is coaxially arranged on the output shaft, a clutch hub is arranged on the driven gear, a pressing area which is alternately provided with friction sheets and steel sheets is enclosed between the clutch hub and the outer wall of the output shaft, the friction sheets are arranged on the output shaft and can slide along the axial direction of the output shaft, the steel sheets are arranged on the clutch hub and can slide along the axial direction of the output shaft,

the output shaft is provided with a piston cylinder which is positioned in the shell and can move along the axial direction of the output shaft and a brake seat which is arranged between the piston cylinder and the inner wall of the shell, a piston which is fixed on the shell and is in sliding sealing fit with the piston cylinder is arranged in the piston cylinder, the piston, the output shaft and the piston cylinder enclose a closed cavity which is communicated with an oil duct in the output shaft, one end of the piston cylinder is abutted against the pressing area to press the friction plate and the steel sheet along the axial direction of the output shaft when the closed cavity is pressurized by oil feeding, an elastic component which is arranged along the axial direction of the output shaft is arranged between the piston cylinder and the output shaft, and the other end of the piston cylinder is abutted against the brake seat to press the brake seat under the action of the elastic component when the closed cavity is depressurized.

Furthermore, the piston cylinder is sleeved on the output shaft in a sliding mode, the piston cylinder is connected with the output shaft through a first cylindrical pin axially arranged along the output shaft, and the elastic piece is arranged in a pin hole used for being inserted into the first cylindrical pin.

Further, the elastic member is a spring.

Furthermore, the end face, opposite to the inner wall of the shell, of the brake seat is provided with an arc-shaped first groove, and the brake seat is fixed on the inner wall of the shell through a connecting piece which is arranged in the first groove and matched with the first groove.

Furthermore, a second groove matched with the first groove is formed in the inner wall for arranging the brake seat, and the connecting piece is installed in an area enclosed by the first groove and the second groove.

Furthermore, the cross sections of the first groove and the second groove are both semicircular, and the connecting piece is a steel ball with an area matched with the area formed by the first groove and the second groove in a surrounding mode.

Furthermore, the included angles formed by the two ends of the first groove and the second groove around the circle center of the arc are both 30-40 degrees.

Further, the piston is fixed on the output shaft through a second cylindrical pin.

Further, the friction plate is fixed to a spline fitted to the output shaft.

Further, the steel plate is fixed to a spline fitted to the outer periphery of the clutch hub.

The utility model has the beneficial effects that:

1. the brake seat is arranged on the piston cylinder and the inner wall of the shell, the piston cylinder which compresses the friction plate of the clutch and the steel sheet is used for compressing and contacting the brake seat to generate brake friction, and the clutch is separated and automatically braked.

2. The brake seat is arranged to rotate a certain angle relative to the inner wall of the shell, so that the output shaft can still rotate under the condition of not influencing the braking effect after the clutch is braked, and the hanging connection of the machine tool is facilitated.

Drawings

Fig. 1 is a schematic structural diagram of a wet clutch according to an embodiment of the present invention;

FIG. 2 is a schematic view of an installation configuration of the piston cylinder of FIG. 1;

fig. 3 is a schematic view of an installation structure of a wet clutch brake base and a housing according to a second embodiment of the present invention;

fig. 4 is a schematic structural diagram of a brake seat of a wet clutch according to a second embodiment of the present invention.

The labels in the figure are: 1. the hydraulic brake comprises an output shaft, 2, a front shell, 3, a driven gear, 4, a friction plate, 5, a steel sheet, 6, a driving gear shaft, 7, a rear shell, 8, a brake seat, 9, a piston, 10, a piston cylinder, 11, a closed cavity, 12, an elastic part, 13, a connecting part, 14, a second cylindrical pin, 15, a first cylindrical pin, 1601, a first groove, 1602 and a second groove.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and detailed description, wherein in the description of the utility model it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the utility model. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Embodiment 1 of the power output wet clutch with automatic braking function of the present invention: as shown in fig. 1 and fig. 2, the wet clutch of this embodiment includes a housing, the housing may be obtained by installing a front housing 2 and a rear housing 7 opposite to each other by means of screws, an output shaft 1 is installed in the housing by means of a bearing support, one end of the output shaft 1 extends out of the housing and is configured to provide output power, the other end is located in the housing, for example, one end of the output shaft 1 extends out of the front housing 2, the other end is installed close to the rear housing 7, the housing is provided with a driving gear shaft 6 for connecting with an electrode to provide a power source, the output shaft 1 is coaxially provided with a driven gear 3 located in the housing and engaged with the driving gear shaft 6 by means of a bearing, the driven gear 3 is provided with a clutch hub, a press-fit region is defined between the clutch hub and an outer wall of the output shaft 1, friction plates 4 and steel plates 5 are alternately arranged in the press-fit region, the friction plates 4 are arranged on the output shaft 1 and can slide axially along the output shaft 1, the steel plate 5 is provided on the clutch hub and is slidable in the axial direction of the output shaft 1.

A piston cylinder 10 capable of moving along the axial direction of the output shaft 1 is further arranged on the output shaft 1 in the shell, the piston cylinder 10 can rotate along with the output shaft 1, a brake seat 8 is arranged between the piston cylinder 10 and the inner wall of a rear shell 7 of the shell, a piston 9 is arranged in the piston cylinder 10, the piston 9 is fixed on the shell and is in sliding sealing fit with the piston cylinder 10, the piston 9, the output shaft 1 and the piston cylinder 10 form a closed cavity 11 communicated with an oil duct in the output shaft 1, hydraulic oil is injected into the closed cavity 11 to push the piston cylinder 10 to move along the axial direction of the output shaft 1, one end of the piston cylinder 10 is abutted against a press fit area, when oil is fed into the closed cavity 11 and pressurized, the piston cylinder 10 compresses a friction plate 4 and a steel plate 5, an elastic part 12 arranged along the axial direction of the output shaft 1 is arranged between the piston cylinder 10 and the output shaft 1, the elastic part 12 can be a spring, and the other end of the piston cylinder 10 is abutted against the brake seat 8, when the hydraulic oil in the closed cavity 11 is decompressed, the elastic part 12 can push the piston cylinder to compress the brake seat 8, so that the output shaft 1 is braked through the compression friction between the brake seat 8 and the piston cylinder 10 when the friction plate 4 is separated from the steel sheet 5.

In the embodiment, the output shaft 1 is provided with the key groove arranged along the axial direction of the output shaft, the spline is embedded in the key groove, and the friction plate 4 is fixed on the spline, so that the friction plate 4 can rotate along with the output shaft 1 and can slide along the axial direction of the output shaft 1.

The embodiment is equipped with the keyway that sets up along the output shaft axial in clutch hub periphery, and the spline is inlayed to the keyway, and steel sheet 5 is fixed on the spline, realizes that steel sheet 5 rotates along with clutch hub and can follow 1 axial slip of output shaft.

In the embodiment, the piston 9 is fixed on the shell through a second cylindrical pin 14 arranged in parallel to the output shaft 1, so that when hydraulic oil is fed into the closed hole gun 11, the piston 9 is fixed, and the piston cylinder 10 moves axially along the output shaft 1.

In this embodiment, the piston cylinder 10 is slidably sleeved on the output shaft 1, and is connected to the output shaft 1 through a first cylindrical pin 15 axially arranged along the output shaft 1, and the elastic member 12 is arranged in a pin hole for inserting the first cylindrical pin 15, so that the piston cylinder 10 can rotate along with the output shaft 1, and can axially move along the output shaft 1.

Embodiment 2 of the power output wet clutch with automatic braking function of the present invention:

unlike embodiment 1, in the clutch of this embodiment, when the brake base 8 is provided, the brake base 8 is not fixed, but the brake base 8 is provided to be rotatable relative to the inner wall of the housing, specifically, as shown in fig. 3 and 4, an arc-shaped first groove 1601 is provided on the end surface of the brake base 8 for connecting with the inner housing 7, a connecting member 13 adapted to the first groove 1601 is provided on the inner wall of the inner housing 7, the adaptation means that the portion of the connecting member 13 located in the first groove 1601 can make the brake base 8 rotate along the arc-shaped first groove 1601 supported by the connecting member 13, when the piston cylinder 10 presses the brake base 8, the power of the driving gear shaft 6 cannot be transmitted to the output shaft 1 through the driven gear 3 due to the loss of the pressing force between the friction plate 4 and the steel plate 5, and the output shaft 1 plays a good role in braking under the pressing force between the piston cylinder 10 and the brake base 8, make output shaft 1 stall, although piston cylinder 10 compresses tightly under the effect of elastic component 12 with brake seat 8 this moment, because the existence of the first recess 1601 of arc form, the output shaft 1 that loses power still can rotate certain angle, and output shaft 1 can not rotate after the current braking relatively, has greatly made things convenient for articulating of machines after the braking.

When the brake seat 8 of this embodiment is set up, when setting up first recess 1601 on the brake seat 8, still can correspond on the inner wall of rear housing 7 and set up second recess 1602, first recess 1601 encloses the region of forming installation connecting piece 13 with second recess 1602, concretely, first recess 1601 and second recess 1602 all can be the arc wall groove of personally submitting semicircular in cross section, when brake seat 8 docks with rear housing 7, first recess 1601 and second recess 1602 enclose into the cross section and be circular logical groove, connecting piece 13 can be with the circular cross section assorted steel ball that leads to the groove, through setting up the suitable active area of piston cylinder 10, make the steel ball load the logical inslot of piston cylinder 10 and rear housing 7 all the time, after the braking, made things convenient for the rotation of output shaft 1 more.

In this embodiment, when the length of the arc-shaped groove is specifically set, the included angle formed by the two ends of the first groove 1601 and the second groove 1602 around the center of the circle where the arc is located is 30-40 °, that is, after the brake seat 8 brakes, the output shaft can have a rotation angle of 30-40 °, which can facilitate the connection of a common machine tool in this range, and the braking effect of the output shaft 1 cannot be affected by the overlong length of the arc-shaped groove.

It should be noted that the detailed description is not given for the prior art, and the above embodiments are only used for illustrating the present invention, but the present invention is not limited to the above embodiments, and any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention fall within the protection scope of the present invention.

Claims

1. The utility model provides a take power take-off wet clutch of automatic braking function, which comprises a housin, output shaft (1) that one end stretched out the casing setting is installed in the casing rotation, output shaft (1) goes up coaxial being equipped with and is located the casing, with driven gear (3) of setting driving gear axle (6) looks meshing on the casing, be equipped with the clutch hub on driven gear (3), enclose into the pressfitting district that is equipped with friction disc (4) and steel sheet (5) in turn between the outer wall of clutch hub and output shaft (1), friction disc (4) set up on output shaft (1) and can follow output shaft (1) endwise slip, steel sheet (5) set up on the clutch hub and can follow output shaft (1) endwise slip, its characterized in that:

a piston cylinder (10) which is positioned in the shell and can axially move along the output shaft (1) and a brake seat (8) which is arranged between the piston cylinder (10) and the inner wall of the shell are arranged on the output shaft (1), a piston (9) which is fixed on the shell and is in sliding seal fit with the piston cylinder (10) is arranged in the piston cylinder (10), the piston (9), the output shaft (1) and the piston cylinder (10) enclose a closed cavity (11) which is communicated with an inner oil duct of the output shaft (1), one end of the piston cylinder (10) is abutted against the press-fit area so as to press the friction plate (4) and the steel sheet (5) in an axial movement manner along the output shaft (1) when the closed cavity (11) is pressurized by oil feeding, an elastic component (12) which is axially arranged along the output shaft (1) is arranged between the piston cylinder (10) and the output shaft (1), and the other end of the piston cylinder (10) is abutted against the brake seat (8) and is used for pressure relief of the closed cavity (11), The brake seat (8) is pressed under the action of the elastic component (12).

2. A power take-off wet clutch with automatic braking function according to claim 1, characterized in that the piston cylinder (10) is slidably fitted over the output shaft (1) and is connected to the output shaft (1) by a first cylindrical pin (15) axially arranged along the output shaft (1), and the elastic member (12) is arranged in a pin hole for inserting the first cylindrical pin (15).

3. A power take-off wet clutch with automatic braking function according to claim 1, characterized in that said elastic member (12) is a spring.

4. A power take-off wet clutch with automatic braking function as claimed in claim 1, characterized in that the end face of the brake shoe (8) opposite to the inner wall of the housing is provided with a first recess (1601) in the shape of an arc, the brake shoe (8) being fixed to the inner wall of the housing by means of a connecting piece (13) arranged in the first recess (1601) and adapted to the first recess (1601).

5. A wet power output clutch with an automatic braking function as claimed in claim 4, characterized in that the inner wall for providing the brake shoe (8) is provided with a second groove (1602) adapted to the first groove (1601), and the connecting member (13) is installed in the area enclosed by the first groove (1601) and the second groove (1602).

6. The wet power output clutch with the automatic braking function as claimed in claim 5, wherein the cross sections of the first groove (1601) and the second groove (1602) are semicircular, and the connecting member (13) is a steel ball which is formed by the first groove (1601) and the second groove (1602) in a matched area.

7. The wet clutch with power output and automatic braking function as claimed in claim 6, wherein the angle formed by the two ends of the first groove (1601) and the second groove (1602) around the center of the arc is 30-40 °.

8. A power take-off wet clutch with automatic braking function according to claim 1, characterized in that the piston (9) is fixed to the output shaft (1) by means of a second cylindrical pin (14).

9. A power output wet clutch with an automatic braking function according to claim 1, characterized in that the friction plate (4) is fixed to a spline fitted to the output shaft (1).

10. A power output wet clutch with an automatic braking function according to claim 1, wherein said steel plate (5) is fixed to a spline fitted to an outer periphery of a clutch hub.