阅读说明：本技术 一种带制动功能的取力器 (Power takeoff with braking function ) 是由 夏惠栋 倪俊曾 于 2019-10-25 设计创作，主要内容包括：本发明涉及一种取力器,具体的说是一种带制动功能的取力器,属于取力器结构技术领域。其包括外壳、输出轴、外活塞、缸体、制动盘和内活塞,输出轴上依次连接内活塞和缸体,内活塞位于缸体内腔中,缸体和外活塞外圈之间夹持制动盘,缸体的缸体轴伸端上套装外活塞,缸体和外活塞内圈之间通过多个弹性压紧组件连接。本发明结构简单、紧凑、合理,集成度高,无需二次调节,可在不影响取力器其他功能的情况下,通过内置的制动结构能够顺畅的实现脱开动作,提高了取力器的使用效果。(The invention relates to a power takeoff, in particular to a power takeoff with a braking function, and belongs to the technical field of power takeoff structures. The brake disc clamping device comprises a shell, an output shaft, an outer piston, a cylinder body, a brake disc and an inner piston, wherein the inner piston and the cylinder body are sequentially connected to the output shaft, the inner piston is located in an inner cavity of the cylinder body, the brake disc is clamped between the cylinder body and an outer ring of the outer piston, the outer piston is sleeved on a shaft extension end of the cylinder body, and the cylinder body is connected with an inner ring of the outer piston through a plurality of elastic pressing assemblies. The power takeoff device is simple, compact and reasonable in structure, high in integration level, free of secondary adjustment, capable of achieving disengaging action smoothly through the built-in braking structure under the condition that other functions of the power takeoff device are not affected, and improving the using effect of the power takeoff device.)

1. The utility model provides a take power takeoff of braking function, includes shell (1), output shaft (3), outer piston (4), cylinder body (5), brake disc (6) and interior piston (13), and output shaft (3) rotate through the bearing at both ends and connect in shell (1), characterized by: an output shaft (3) is sequentially connected with an inner piston (13) and a cylinder body (5), the inner piston (13) is positioned in an inner cavity of the cylinder body (5), a brake disc (6) is clamped between the cylinder body (5) and an outer ring of an outer piston (4), the outer piston (4) is sleeved on a cylinder body shaft extension end (15) of the cylinder body (5), the cylinder body (5) and an inner ring of the outer piston (4) are connected through a plurality of elastic pressing components, and the elastic pressing components are uniformly distributed along the circumferential direction of the outer piston (4); the output shaft (3) is provided with an axial medium channel (7) along the axial direction, the output shaft (3) is provided with a radial medium channel (8) along the radial direction, and a first medium chamber for accommodating a medium is arranged between the inner piston (13) and the bottom of the inner cavity of the cylinder body (5); one end of the axial medium channel (7) is communicated with the outside, the other end of the axial medium channel (7) is connected with one end of the radial medium channel (8), and the other end of the radial medium channel (8) is connected with the first medium chamber; the cylinder body (5) is provided with a plurality of cylinder body axial medium channels (9) along the axial direction, a second medium chamber is arranged between the cylinder body (5) and the outer piston (4), and two ends of the plurality of cylinder body axial medium channels (9) are respectively communicated with the first medium chamber and the second medium chamber.

2. The power takeoff with braking function as claimed in claim 1, wherein: one side of the shell (1) is detachably connected with the end cover (2) through a connecting piece.

3. The power takeoff with braking function as claimed in claim 1, wherein: a clamp spring (14) is arranged on a cylinder body shaft extension end (15) of the cylinder body (5), and the clamp spring (14) is located at the rear end of the outer piston (4).

4. The power takeoff with braking function as claimed in claim 1, wherein: the outer piston (4) is equipped with positioning ring groove (10) towards brake disc (6) terminal surface along the circumferencial direction, and brake disc (6) location suit is in positioning ring groove (10).

5. The power takeoff with braking function as claimed in claim 1, wherein: the elastic pressing assembly comprises a spring (11) and a screw (12), the screw (12) penetrates through the outer piston (4) and then is connected with the cylinder body (5) through threads, the spring (11) is sleeved on the screw (12), and the front end and the rear end of the spring (11) are respectively contacted with the inner end face of the outer piston (4) and the rear end face of the screw (12).

6. The power takeoff with braking function as claimed in claim 1, wherein: the plurality of cylinder body axial medium channels (9) are uniformly distributed along the circumferential direction of the cylinder body (5).

Technical Field

The invention relates to a power takeoff, in particular to a power takeoff with a braking function, and belongs to the technical field of power takeoff structures.

Background

At present, the domestic power takeoff is mainly applied to a dump truck, the power takeoff on the vehicles is usually provided with a hydraulic pump, and the power takeoff mode is stable. Along with the diversification of engineering vehicles, the load form of the rear connection of the power takeoff is gradually increased, and when the rotational inertia of the rear connection load is large, the power takeoff is often unsmooth in the use process.

In view of this situation, most refit plants need to externally connect a brake disc at the output end of the power takeoff after receiving the chassis, so that the application of the traditional power takeoff has certain limitations for these special application occasions.

Disclosure of Invention

The invention aims to overcome the defects, and provides the power takeoff with the braking function, which can smoothly realize the disengagement action through the built-in braking structure, thereby improving the using effect of the power takeoff.

According to the technical scheme provided by the invention, the power takeoff with the braking function comprises a shell, an output shaft, an outer piston, a cylinder body, a brake disc and an inner piston, wherein the output shaft is rotatably connected in the shell through bearings at two ends, and the power takeoff with the braking function is characterized in that: the output shaft is sequentially connected with an inner piston and a cylinder body, the inner piston is positioned in an inner cavity of the cylinder body, a brake disc is clamped between the cylinder body and an outer ring of the outer piston, the outer piston is sleeved on a shaft extension end of the cylinder body, the cylinder body is connected with an inner ring of the outer piston through a plurality of elastic pressing assemblies, and the elastic pressing assemblies are uniformly distributed along the circumferential direction of the outer piston; the output shaft is provided with an axial medium channel along the axial direction, the output shaft is provided with a radial medium channel along the radial direction, and a first medium chamber for accommodating a medium is arranged between the inner piston and the bottom of the inner cavity of the cylinder body; one end of the axial medium channel is communicated with the outside, the other end of the axial medium channel is connected with one end of the radial medium channel, and the other end of the radial medium channel is connected with the first medium chamber; the cylinder body is provided with a plurality of cylinder body axial medium channels along the axial direction, a second medium cavity is arranged between the cylinder body and the outer piston, and two ends of the plurality of cylinder body axial medium channels are respectively communicated with the first medium cavity and the second medium cavity.

Furthermore, one side of the shell is detachably connected with the end cover through a connecting piece.

Furthermore, a clamp spring is arranged at the cylinder body axial extension end of the cylinder body and is positioned at the rear end of the outer piston.

Furthermore, the outer piston is provided with a positioning ring groove facing the end face of the brake disc along the circumferential direction, and the brake disc is positioned and sleeved in the positioning ring groove.

Furthermore, the elastic pressing assembly comprises a spring and a screw, the screw penetrates through the outer piston and then is connected with the cylinder body through threads, the spring is sleeved on the screw, and the front end and the rear end of the spring are respectively in contact with the inner end face of the outer piston and the rear end face of the screw.

Further, a plurality of cylinder body axial medium channels are evenly distributed along the circumferential direction of the cylinder body.

Compared with the prior art, the invention has the following advantages:

the power takeoff device is simple, compact and reasonable in structure, high in integration level, free of secondary adjustment, capable of achieving disengaging action smoothly through the built-in braking structure under the condition that other functions of the power takeoff device are not affected, and improving the using effect of the power takeoff device.

Drawings

FIG. 1 is a half-sectional view of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Description of reference numerals: 1-shell, 2-end cover, 3-output shaft, 4-outer piston, 5-cylinder body, 6-brake disc, 7-axial medium channel, 8-radial medium channel, 9-cylinder body axial medium channel, 10-positioning ring groove, 11-spring, 12-screw, 13-inner piston, 14-snap spring, 15-cylinder body shaft extension end.

Detailed Description

The invention will be further described with reference to examples in the drawings to which:

as shown in fig. 1 ~ 2, the present invention mainly includes a housing 1, an output shaft 3, an outer piston 4, a cylinder 5, a brake disk 6, and an inner piston 13.

Output shaft 3 passes through the bearing rotation connection at both ends in shell 1, and shell 1 one side is through connecting piece detachable connection end cover 2.

The output shaft 3 is sequentially connected with an inner piston 13 and a cylinder body 5, the inner piston 13 is positioned in an inner cavity of the cylinder body 5, a brake disc 6 is clamped between outer rings of the cylinder body 5 and an outer piston 4, the outer piston 4 is sleeved on a cylinder body shaft extension end 15 of the cylinder body 5, in order to avoid the outer piston 4 from being separated from the cylinder body shaft extension end 15 of the cylinder body 5, a clamp spring 14 is arranged on the cylinder body shaft extension end 15 of the cylinder body 5, and the clamp spring 14 is positioned at the rear end of the outer piston 4.

The cylinder body 5 is connected with the inner ring of the outer piston 4 through a plurality of elastic pressing components which are uniformly distributed along the circumferential direction of the outer piston 4.

In order to avoid radial deviation of the brake disc 6, a positioning ring groove 10 is formed in the end face, facing the brake disc 6, of the outer piston 4 in the circumferential direction, and the brake disc 6 is positioned and sleeved in the positioning ring groove 10.

The elastic pressing assembly comprises a spring 11 and a screw 12, the screw 12 penetrates through the outer piston 4 and then is connected with the cylinder body 5 through threads, the spring 11 is sleeved on the screw 12, and the front end and the rear end of the spring 11 are respectively in contact with the inner end face of the outer piston 4 and the rear end face of the screw 12.

The output shaft 3 is provided with an axial medium channel 7 along the axial direction, the output shaft 3 is provided with a radial medium channel 8 along the radial direction, and a first medium chamber for accommodating a medium is arranged between the inner piston 13 and the bottom of the inner cavity of the cylinder body 5. One end of the axial medium channel 7 is communicated with the outside, the other end of the axial medium channel 7 is connected with one end of the radial medium channel 8, and the other end of the radial medium channel 8 is connected with the first medium chamber.

The cylinder body 5 is provided with a plurality of cylinder body axial medium channels 9 along the axial direction, and the plurality of cylinder body axial medium channels 9 are uniformly distributed along the circumferential direction of the cylinder body 5. A second medium chamber is arranged between the cylinder body 5 and the outer piston 4, and two ends of the plurality of cylinder body axial medium channels 9 are respectively communicated with the first medium chamber and the second medium chamber.

The medium mentioned in the present invention may be compressed air or pressure oil.

The working principle of the invention is as follows: when the power takeoff works, compressed air or pressure oil enters a first medium cavity between the cylinder body and the inner piston through an axial medium channel and a radial medium channel in the output shaft, a part of air or oil enters a second medium cavity between the outer piston and the cylinder body through an axial medium channel of the cylinder body, the outer piston is pushed to move axially until the outer piston is abutted against the clamp spring, and at the moment, the brake disc is in a floating state and does not play a braking role. When the power takeoff is required to stop working, the air source or the pressure oil is cut off, and the spring pushes the outer piston back to the initial position due to the relative position fixing of the screw and the cylinder body. The brake disc is clamped by the inner piston and the cylinder body again, so that friction torque for preventing rotation is generated, and braking is further realized.