Power takeoff with thrust bearing

Abstract

The utility model discloses a power takeoff with a thrust bearing, which comprises a shell, an output shaft and an input shaft, an input gear is mounted on the input shaft, the input gear is meshed with a transmission gear, and the transmission gear is connected with a piston through a clutch; the clutch comprises a transmission part, and a plurality of dual discs are further installed on the inner side face of the transmission part. An output gear is further included, a plurality of friction plates are installed on the outer side of the output gear, and a thrust bearing is further installed between the clutch and the piston. The inner side face of the piston is connected to the piston seat in a sleeved mode, and O-shaped sealing rings are arranged on the side, making contact with the piston seat, of the piston and the side, making contact with the shell, of the piston. According to the power takeoff with the thrust bearing, on the basis of an original structure, the structure of the thrust bearing and the bearing support is additionally arranged between the piston and the friction plate, and rotation is divided. The O-shaped sealing ring only does reciprocating motion, the overall separation performance of the power takeoff can be effectively improved, and the service life of the power takeoff is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, and particularly relates to a power take-off with a thrust bearing. Background Art

[0002] At present, most vehicles in the domestic special vehicle market, such as green sprinklers, road sweepers, and road cleaning vehicles, have a demand for power take-off during driving. A clutch structure is added inside its structure. By controlling the separation and combination of the friction plate and the mating plate of the clutch, the power on and off between the power take-off and the transmission is realized, so that the transmission can also realize the shifting function when the power take-off is working. Since the piston rotates after contacting the friction plate during this working process, the O-ring on the piston will be in a state of "axial reciprocating + rotation". The O-ring will lose its sealing effect prematurely, resulting in air leakage and the inability to realize the operation of the power take-off. Summary of the Invention

[0003] Aiming at the deficiencies existing in the prior art, the purpose of the utility model is to provide a power take-off with a thrust bearing to solve the problem of poor sealing effect of the power take-off in the prior art.

[0004] To solve the above technical problems, the utility model is realized by adopting the following technical solutions: A power take-off with a thrust bearing includes a clutch. The clutch includes a transmission member installed on one side of the transmission gear. The transmission member is a hollow cylinder shape with one end open. A plurality of mating plates are also installed on the inner side surface of the transmission member facing the output shaft.

[0005] The clutch further includes an output gear installed on the output shaft. A plurality of friction plates are installed along the outer circumference of the output gear. The friction plates and the mating plates are alternately distributed.

[0006] A thrust bearing is also installed between the clutch and the piston.

[0007] The inner side surface of the piston is sleeved on the piston seat. The outer side surface of the piston contacts the inner side surface of the housing. The piston seat is connected to the housing. O-rings are provided on both the side where the piston contacts the piston seat and the side where the piston contacts the housing.

[0008] An air chamber is formed among the piston, the piston seat, and the housing.

[0009] The thrust bearing race is sleeved on the piston. A bearing seat is installed on the outer side of the thrust bearing shaft race. The piston can drive the bearing seat to contact the friction plate.

[0010] A return spring is also installed between the bearing seat and the output gear.

[0011] The utility model also has the following technical features:

[0012] It further includes a housing, an output shaft and an input shaft are installed in parallel in the housing, and one end of the output shaft extends out of the housing.

[0013] An input gear is installed on the input shaft, the input gear meshes with a transmission gear sleeved on the output shaft, the transmission gear can rotate along the outer periphery of the output shaft, and the input gear extends out of the housing.

[0014] The transmission gear is connected to a piston through a clutch sleeved on the output shaft.

[0015] The input shaft and the input gear are connected through a bearing, and the output shaft and the housing are connected through a bearing.

[0016] The bearing adopts a tapered roller bearing.

[0017] The input gear adopts a double gear, and the double gear includes a power take-off gear meshing with a power source and a transmission gear meshing with the transmission gear.

[0018] One end of the housing where the piston seat is installed is further covered with a bearing end cover, the other end of the housing covered with the bearing end cover is further covered with a front end cover, and the output shaft extends out of the front end cover.

[0019] Compared with the prior art, the utility model has the following technical effects:

[0020] (Ⅰ) A power take-off with a thrust bearing provided by the utility model adds a structure of "thrust bearing + bearing support" between the piston and the friction plate on the basis of the original structure, and divides the "rotation". So that the O-ring only has reciprocating motion, which can more effectively improve the overall separation performance of the power take-off and extend the service life of the power take-off.

[0021] (Ⅱ) The power take-off with a thrust bearing provided by the utility model has a simple structure and high reliability. Description of the Drawings

[0022] Figure 1 is a schematic diagram of the overall structure of the power take-off with a thrust bearing of the utility model.

[0023] Figure 2 is Figure 1 a partial enlarged schematic diagram of

[0024] The meanings of the reference numerals in the drawings:

[0025] 1 - Housing, 2 - Output shaft, 3 - Input shaft, 4 - Input gear, 5 - Transmission gear, 6 - Clutch, 7 - Piston, 8 - Thrust bearing, 9 - Piston seat, 10 - O-ring seal, 11 - Air chamber, 12 - Bearing housing, 13 - Return spring, 14 - Bearing end cover, 15 - Front end cover, 16 - Tapered roller bearing.

[0026] 4-1 - Power take-off gear, 4-2 - Transmission gear.

[0027] 6-1 - Transmission part, 6-2 - Dual plate, 6-3 - Output gear, 6-4 - Friction plate.

[0028] The following further elaborates on the specific content of the present utility model in conjunction with embodiments. Specific embodiments

[0029] All components in the present utility model, unless otherwise specified, are all components known in the prior art.

[0030] The following provides specific embodiments of the present utility model. It should be noted that the present utility model is not limited to the following specific embodiments, and all equivalent transformations made on the basis of the technical solutions of this application fall within the protection scope of the present utility model.

[0031] Embodiment 1:

[0032] This embodiment provides a power take-off with a thrust bearing, as Figure 1 shown, including a housing 1. An output shaft 2 and an input shaft 3 are installed in parallel within the housing 1, and one end of the output shaft 2 extends out of the housing 1.

[0033] An input gear 4 is installed on the input shaft 3. The input gear 4 meshes with a transmission gear 5 sleeved on the output shaft 2. The transmission gear 5 can rotate along the outer circumference of the output shaft 2, and the input gear 4 extends out of the housing 1.

[0034] The transmission gear 5 is connected to a piston 7 through a clutch 6 sleeved on the output shaft 2.

[0035] The clutch 6 includes a transmission part 6-1 installed on one side of the transmission gear 5. The transmission part 6-1 is a hollow cylindrical shape with one end open, and a plurality of dual plates 6-2 are also installed on the inner side surface of the transmission part 6-1 facing the output shaft 2.

[0036] The clutch 6 further includes an output gear 6-3 installed on the output shaft 2. A plurality of friction plates 6-4 are installed along the outer circumference of the output gear 6-3. The friction plates 6-4 and the dual plates 6-2 are alternately distributed.

[0037] A thrust bearing 8 is also installed between the clutch 6 and the piston 7.

[0038] The inner side of the piston 7 is sleeved on the piston seat 9, the outer side of the piston 7 contacts the inner side of the housing 1, the piston seat 9 is connected to the housing 1, and O-ring seals 10 are provided on both the side where the piston 7 contacts the piston seat 9 and the side where the piston 7 contacts the housing 1.

[0039] An air chamber 11 is formed among the piston 7, the piston seat 9 and the housing 1.

[0040] The seat ring of the thrust bearing 8 is sleeved on the piston 7, a bearing seat 12 is installed outside the shaft ring of the thrust bearing 8, and the piston 7 can drive the bearing seat 12 to contact the friction plate 6-4.

[0041] A return spring 13 is further installed between the bearing seat 12 and the output gear 6-3.

[0042] The power take-off with a thrust bearing further includes a gas supply system, and the gas supply system is communicated with the air chamber 11 through an air passage arranged in the output shaft 2.

[0043] When the air chamber 11 intakes air, the piston 7 can drive the bearing seat 12 to contact the friction plate 6-4, and the friction plate 6-4 and the mating plate 6-2 are pressed against each other for transmission; when the air chamber 11 exhausts air, the friction plate 6-4 and the mating plate 6-2 rotate freely relative to each other.

[0044] The rotational power is transmitted from the input gear 4 to the transmission member 6-1 through the transmission gear 5. The transmission member 6-1 drives the mating plate 6-2 to rotate. At the same time, the gas supply system supplies gas to the air chamber 11, pushing the piston 7 to move axially. The piston 7 pushes the thrust bearing 8, and the thrust bearing 8 axially pushes the bearing seat 12. The bearing seat 12 axially pushes the friction plate 6-4 to slowly contact the mating plate 6-2. The power is transmitted from the mating plate 6-2 to the friction plate 6-4, and then the friction plate 6-4 is transmitted to the output shaft 2 through the output gear 6-3, realizing power output.

[0045] The seat ring on the left side of the thrust bearing 8 is installed on the piston 7 with interference fit. The rotation is interrupted at the thrust bearing 8, and the piston 7 is installed on the piston seat 9 and does not contact the output shaft 2. The rotational force will not be transmitted to the piston 7, and the O-ring seal 10 will only have reciprocating motion during operation and no longer have rotational motion. This can more effectively improve the overall disengagement performance of the power take-off and extend the service life of the power take-off.

[0046] As a preference of this embodiment:

[0047] The input shaft 3 and the input gear 4 are connected by a bearing, and the output shaft 2 and the housing 1 are connected by a bearing.

[0048] The bearing adopts a tapered roller bearing 16.

[0049] The input gear 4 described above is a double gear, which includes a power take-off gear 4-1 meshed with the power source and a transmission gear 4-2 meshed with the transmission gear 5.

[0050] One end of the housing 1 where the piston seat 9 is installed is also covered with a bearing end cover 14 to limit the position of the bearing. The other end of the housing 1 covered with the bearing end cover 14 is also covered with a front end cover 15, and the output shaft 2 extends out of the front end cover 15.

[0051] The specific working process of this embodiment is as follows:

[0052] Before improvement: The power is transmitted from the input gear 4 to the counter piece 4 through the transmission gear 2. The transmission gear 5 transmits the power to the transmission member 6-1, and the transmission member 6-1 drives the counter piece 6-2 to rotate. At the same time, the air supply system supplies air to the air chamber 11, pushing the piston 7 to move axially. The piston 7 axially pushes the friction plate 6-4 to slowly contact the counter piece 6-2. The power is transmitted from the counter piece 6-2 to the friction plate 6-4, and the friction plate 6-4 is then transmitted to the output shaft 2 through the output gear 6-3 to achieve power output.

[0053] When the friction plate 6-4 contacts the counter piece 6-2 instantaneously in this structure, rotation will occur. The friction plate 6-4 drives the piston 7 to rotate. At this time, the piston 7 and the O-ring 10 thereon will be in a state of "axial reciprocation + rotation". The O-ring 10 will lose the sealing effect prematurely, resulting in air leakage and causing the power take-off to malfunction.

[0054] After improvement: The rotational power is transmitted from the input gear 4 to the transmission member 6-1 through the transmission gear 5. The transmission member 6-1 drives the counter piece 6-2 to rotate. At the same time, the air supply system supplies air to the air chamber 11, pushing the piston 7 to move axially. The piston 7 pushes the thrust bearing 8, and the thrust bearing 8 axially pushes the bearing seat 12. The bearing seat 12 axially pushes the friction plate 6-4 to slowly contact the counter piece 6-2. The power is transmitted from the counter piece 6-2 to the friction plate 6-4, and the friction plate 6-4 is then transmitted to the output shaft 2 through the output gear 6-3 to achieve power output.

[0055] When the friction plate 6-4 contacts the counter piece 6-2 instantaneously in this structure, rotation will occur. The friction plate 6-4 drives the bearing seat 12 to rotate. Due to the structural characteristics of the thrust bearing 8, the rotation on the right side of the thrust bearing 8 cannot be transmitted to its left side. The piston 7 and the O-ring 10 thereon are only in a state of "axial reciprocation". The sealing effect of the O-ring 10 is improved, and thus the normal working life of the power take-off is extended.

[0056] The above technical solutions are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be thought of by those skilled in the art within the technical scope disclosed by the present utility model without creative efforts are covered by the protection scope of the present utility model.

Claims

1. A power take-off with a thrust bearing, comprising a clutch (6), characterized in that, The described clutch (6) includes a transmission member (6-1) installed on one side of the transmission gear (5). The transmission member (6-1) is in the shape of a hollow cylinder with one end open. A plurality of coupling plates (6-2) are also installed on the inner side of the transmission member (6-1) facing the output shaft (2). The clutch (6) further includes an output gear (6-3) installed on the output shaft (2). A plurality of friction plates (6-4) are installed on the outer circumference of the output gear (6-3) along its circumferential direction. The friction plates (6-4) and the coupling plates (6-2) are alternately distributed. A thrust bearing (8) is also installed between the clutch (6) and the piston (7). The inner side of the piston (7) is sleeved on the piston seat (9). The outer side of the piston (7) contacts the inner side of the housing (1). The piston seat (9) is connected to the housing (1). O-ring seals (10) are provided on both the side where the piston (7) contacts the piston seat (9) and the side where the piston (7) contacts the housing (1). An air chamber (11) is formed between the piston (7), the piston seat (9) and the housing (1). The seat ring of the thrust bearing (8) is sleeved on the piston (7). A bearing seat (12) is installed on the outer side of the shaft ring of the thrust bearing (8). The piston (7) can drive the bearing seat (12) to contact the friction plate (6-4). A return spring (13) is also installed between the bearing seat (12) and the output gear (6-3).

2. The power take-off with a thrust bearing according to claim 1, characterized in that, It further includes a housing (1). An output shaft (2) and an input shaft (3) are installed in parallel in the housing (1). One end of the output shaft (2) extends out of the housing (1). An input gear (4) is installed on the input shaft (3). The input gear (4) meshes with a transmission gear (5) sleeved on the output shaft (2). The transmission gear (5) can rotate along the outer circumference of the output shaft (2). The input gear (4) extends out of the housing (1). The transmission gear (5) is connected to the piston (7) through a clutch (6) sleeved on the output shaft (2).

3. The power take-off with a thrust bearing according to claim 2, characterized in that, The input shaft (3) and the input gear (4) are connected by a bearing. The output shaft (2) and the housing (1) are connected by a bearing. The bearing is a tapered roller bearing.

4. The power take-off with a thrust bearing according to claim 2, characterized in that, The input gear (4) is a double gear. The double gear includes a power take-off gear (4-1) meshing with a power source and a transmission gear (4-2) meshing with the transmission gear (5).

5. The power take-off with a thrust bearing according to claim 2, characterized in that, One end of the housing (1) where the piston seat (9) is installed is also covered with a bearing end cover (14). The other end of the housing (1) covered with the bearing end cover (14) is also covered with a front end cover (15). The output shaft (2) extends out of the front end cover (15).

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