阅读说明：本技术 自带扭矩限制功能的取力器 (Power takeoff with torque limiting function ) 是由 倪俊曾 夏惠栋 于 2020-04-26 设计创作，主要内容包括：本发明属于工程车辆零部件领域,涉及一种自带扭矩限制功能的取力器,包括箱体,所述箱体内部转动设置传动轴,传动轴上转动设置齿轮,齿轮的花键部与若干片驱动片的内圈齿形部相啮合,相邻两片驱动片之间分别设置一片离合片,离合片的外圈齿形部与缸体的内圈齿形部相啮合,缸体内腔还设置压板,压板的内孔配合设置弹簧,弹簧轴向外端压紧于离合片与驱动片构成的组件一端,离合片与驱动片构成的组件另一端通过缸体内孔的限位部进行轴向限位,缸体的内孔齿形部与传动轴上的齿形部相啮合。该取力器能有效解决取力器在使用过程中负载扭矩有突增超过取力器额定扭矩,采用扭矩限制的方式,保护取力器。(The invention belongs to the field of parts of engineering vehicles, and relates to a power takeoff with a torque limiting function, which comprises a box body, wherein a transmission shaft is rotatably arranged in the box body, a gear is rotatably arranged on the transmission shaft, a spline part of the gear is meshed with the tooth form parts of the inner rings of a plurality of driving sheets, a clutch sheet is respectively arranged between every two adjacent driving sheets, the tooth form parts of the outer rings of the clutch sheets are meshed with the tooth form parts of the inner rings of a cylinder body, a pressing plate is further arranged in the inner cavity of the cylinder body, a spring is arranged in the inner hole of the pressing plate in a matched mode, the outer end of the spring shaft is tightly pressed at one end of an assembly formed by the clutch sheets and the driving sheets, the other end of the assembly formed by the clutch sheets and the driving. The power takeoff can effectively solve the problem that the load torque of the power takeoff is suddenly increased to exceed the rated torque of the power takeoff in the using process, and the power takeoff is protected by adopting a torque limiting mode.)

1. The utility model provides a take power takeoff from area moment of torsion limit function which characterized in that: the automatic clutch device is characterized by comprising a box body (4), a transmission shaft (5) is arranged in the box body (4) in a rotating mode, a gear (7) is arranged on the transmission shaft (5) in a rotating mode, a spline portion of the gear (7) is meshed with an inner ring tooth form portion of a plurality of driving sheets (12), a clutch sheet (11) is arranged between every two adjacent driving sheets (12), an outer ring tooth form portion of the clutch sheet (11) is meshed with an inner ring tooth form portion of a cylinder body (10), a pressing plate (14) is further arranged in an inner cavity of the cylinder body (10), a spring (13) is arranged in a matching mode of an inner hole of the pressing plate (14), the axial outer end of the spring (13) is tightly pressed at one end of an assembly formed by the clutch sheet (11) and the driving sheets (12), axial limiting is carried out on the other end of the assembly formed by the clutch sheet (11) and the driving sheets (12).

2. The power takeoff with torque limiting function as defined in claim 1, wherein: the transmission shaft (5) is rotatably supported in the box body (4) through the first conical bearing (3) and the second conical bearing (15), the second conical bearing (15) is axially limited through the second hole retainer ring (16), and an oil seal (17) is arranged between the transmission shaft (5) and the box body (4).

3. The power takeoff with torque limiting function as defined in claim 1, wherein: an end cover (1) is arranged at the axial end of the box body (4).

4. The power takeoff with torque limiting function as defined in claim 1, wherein: and a needle bearing (6) is arranged in an inner hole of the gear (7), and the transmission shaft (5) penetrates through the needle bearing (6).

5. The power takeoff with torque limiting function as defined in claim 1, wherein: the axial two ends of an assembly formed by the clutch plate (11) and the driving plate (12) are respectively provided with a partition plate (9), one partition plate (9) is limited by a retainer ring (8) through a first hole formed in an inner hole of the cylinder body (10), and the other partition plate is pressed by a spring (13).

6. The power takeoff with torque limiting function as defined in claim 1, wherein: the axial outer end of the pressure plate (14) is axially limited through a limiting retainer ring.

7. The power takeoff with torque limiting function as defined in claim 1, wherein: the axial outer end of the gear (7) is limited by a gasket arranged on the transmission shaft (5), and an inner hole of the spline part of the gear (7) is axially limited by a limiting retainer ring.

Technical Field

The invention belongs to the field of parts of engineering vehicles, and relates to a power takeoff with a torque limiting function.

Background

With the development of national economy, the demand and application of special vehicles are continuously increasing. The types of vehicles are continuously updated, which puts higher requirements on the transformation of special vehicles. At present, most special vehicles use a power takeoff to take power out of an engine or a gearbox, so that the vehicles can operate under special application, and various use requirements are effectively met. For some special application occasions of the power takeoff, such as driving the air compressor, the starting characteristic of the air compressor determines that the torque can be suddenly increased when the air compressor is started and is larger than the rated torque when the air compressor normally works, the suddenly increased torque is a great challenge to the application of the power takeoff, and the phenomenon that parts of the power takeoff are damaged often occurs in the using process.

Disclosure of Invention

The invention aims at the problems and provides a power takeoff with a torque limiting function, which can effectively solve the problem that the load torque suddenly increases to exceed the rated torque of the power takeoff in the using process of the power takeoff and protects the power takeoff in a torque limiting mode.

According to the technical scheme of the invention: the utility model provides a take power takeoff from area moment of torsion limit function which characterized in that: the automatic clutch device comprises a box body, the inside rotation of box sets up the transmission shaft, it sets up the gear to rotate on the transmission shaft, the spline portion of gear meshes with the inner circle profile of tooth portion of a plurality of driving discs, set up a clutch disc between two adjacent driving discs respectively, the outer lane profile of tooth portion of clutch disc meshes with the inner circle profile of tooth portion of cylinder body, the cylinder body inner chamber still sets up the clamp plate, the hole cooperation of clamp plate sets up the spring, the outer end of spring shaft compresses tightly in the subassembly one end that clutch disc and driving disc constitute, the subassembly other end that clutch disc and driving disc constitute carries out axial spacing through the spacing portion of cylinder body hole, the hole profile of tooth portion and the epaxial profile of.

As a further improvement of the invention, the transmission shaft is rotatably supported in the box body through a first conical bearing and a second conical bearing, the second conical bearing is axially limited through a second hole check ring, and an oil seal is arranged between the transmission shaft and the box body.

As a further improvement of the invention, an end cover is arranged at the axial end part of the box body.

As a further improvement of the invention, a needle bearing is arranged in an inner hole of the gear, and the transmission shaft penetrates through the needle bearing.

As a further improvement of the invention, the axial two ends of the assembly formed by the clutch plate and the driving plate are respectively provided with a clapboard, wherein one clapboard is limited by a retainer ring through a first hole arranged in the inner hole of the cylinder body, and the other clapboard is pressed tightly by a spring.

As a further improvement of the invention, the axial outer end of the pressure plate is axially limited by a limit check ring.

As a further improvement of the invention, the gear shaft is limited at the outer end by a gasket arranged on the transmission shaft, and the inner hole of the spline part of the gear is limited axially by a limit check ring.

The invention has the technical effects that: the product of the invention has novel structure, high integration level, small assembly volume and light weight; the torque limiting function is provided, when the load torque exceeds the rated torque of the power takeoff, the power takeoff slips through the torque limiter, so that the excessive torque cannot damage the power takeoff body; the torque-increasing device is suitable for special occasions where torque can be increased suddenly in the working process, and the application occasions of the power takeoff are expanded.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings.

In fig. 1, the device includes an end cap 1, a screw 2, a first taper bearing 3, a housing 4, a transmission shaft 5, a needle bearing 6, a gear 7, a first hole retainer 8, a partition plate 9, a cylinder 10, a clutch plate 11, a driving plate 12, a spring 13, a pressure plate 14, a second taper bearing 15, a second hole retainer 16, an oil seal 17, and the like.

As shown in fig. 1, the invention is a power takeoff with torque limiting function, comprising a box body 4, a transmission shaft 5 is rotatably arranged in the box body 4, the transmission shaft 5 is rotatably supported in the box body 4 through a first conical bearing 3 and a second conical bearing 15, the second conical bearing 15 is axially limited through a second hole by a retainer ring 16, and an oil seal 17 is arranged between the transmission shaft 5 and the box body 4.

The transmission shaft 5 is rotatably provided with a gear 7, when in specific production, a needle bearing 6 is arranged in an inner hole of the gear 7, and the transmission shaft 5 penetrates through the needle bearing 6 to realize the rotation of the gear 7 relative to the transmission shaft 5.

The spline part of the gear 7 is meshed with the tooth form parts of the inner rings of a plurality of driving sheets 12, a clutch sheet 11 is arranged between each two adjacent driving sheets 12, the tooth form part of the outer ring of the clutch sheet 11 is meshed with the tooth form part of the inner ring of the cylinder body 10, a pressing plate 14 is further arranged in the inner cavity of the cylinder body 10, a spring 13 is arranged in the inner hole of the pressing plate 14 in a matched mode, the axial outer end of the spring 13 is pressed at one end of an assembly formed by the clutch sheet 11 and the driving sheets 12, the other end of the assembly formed by the clutch sheet 11 and the driving sheets 12 is axially limited through the limiting part of the inner hole of the cylinder body 10.

An end cover 1 is arranged at the axial end part of the box body 4, and the end cover 1 is tightly connected to the box body 4 through a screw 2.

The axial two ends of the assembly formed by the clutch plate 11 and the driving plate 12 are respectively provided with a baffle plate 9, one baffle plate 9 is limited by a retainer ring 8 through a first hole arranged in an inner hole of the cylinder body 10, and the other baffle plate is pressed tightly by a spring 13.

The axial outer end of the pressure plate 14 is axially limited by a limit stop ring.

The axial outer end of the gear 7 is limited by a gasket arranged on the transmission shaft 5, and the inner hole of the spline part of the gear 7 is axially limited by a limiting retainer ring.

As shown in fig. 1, the working principle of the product of the invention is as follows: a transmission shaft 5 of the power takeoff is installed in a box body 4 through a first conical bearing 3 and a second conical bearing 15, the first conical bearing 3 is limited on the left side of the box body 4 through a screw 2 by an end cover 1, the second conical bearing 15 is limited on the right side of the box body 4 through a retainer ring 16 for a hole, a needle bearing 6 is installed in an inner hole of a gear 7, the transmission shaft 5 penetrates through the transmission shaft, and an oil seal 17 is installed at the right end of the box body 4 to achieve the purpose of sealing gear oil. The external spline of the A part of the gear 7 is meshed with the internal spline of the driving plate 12, the external spline of the clutch plate 11 is meshed with the internal spline of the B part of the cylinder body 10, the spring 13 presses certain pre-pressure on the clutch plate 11 and the driving plate 12 through the partition plate 9 to generate certain friction torque, so that the gear 7 drives the cylinder body 10 to rotate, the cylinder body 10 is meshed with the transmission shaft 5 through the spline of the C part, and the cylinder body 10 drives the transmission shaft 5 to rotate. When the torque borne by the transmission shaft 5 is larger than the friction torque generated by the spring 13 prepressing on the clutch plate 11 and the driving plate 12, the clutch plate 11 and the driving plate 12 start to slip, so that the power takeoff is protected, and when the torque borne by the transmission shaft 5 is restored to be smaller than the friction torque generated by the spring 13 prepressing on the clutch plate 11 and the driving plate 12, the clutch plate 11 and the driving plate 12 stop slipping, so that full power output can be realized. The maximum torque that can be transmitted by the power take-off is the friction torque that the spring 13 preloads on the clutch plate 11 and the driving plate 12, and the torque can be set.