CN85205731U

CN85205731U - Hydraulic clutch

Info

Publication number: CN85205731U
Application number: CN 85205731
Authority: CN
Inventors: 程友文
Original assignee: Changsha Building Machinery Institute Ministry Of Urban And Rural Construction
Current assignee: Changsha Building Machinery Institute Ministry Of Urban And Rural Construction
Priority date: 1985-12-23
Filing date: 1985-12-23
Publication date: 1986-08-13

Abstract

The utility model relates to a novel hydraulic clutch, and the structure principle of the novel hydraulic clutch is showed as the picture. The novel hydraulic clutch utilizes the size of the rotation speed of an output shaft 16 to control valve core 14 to move up and down, and thus, the pressure oil in an oil guide pipe 13 can be controlled to enter or stop entering in a cylinder body 10. Thus, the novel hydraulic clutch can achieve the purpose that teeth of a piston 9 are engaged with or are separated from the teeth of the teeth sleeve of a pump wheel 2. The hydraulic clutch has the same performance with the general hydraulic clutch when the hydraulic clutch is at the starting operating condition and the overload operating condition. When the hydraulic clutch is at the normal operation, the transmission of the hydraulic clutch can be changed into the direct transmission of an input shaft sleeve 1 and the output shaft 16. Thus, the hydraulic clutch can improve the transmission efficiency of the device of the hydraulic clutch in the transmission system and save the energy.

Description

Hydraulic clutch

The utility model relates to the automatic locking mechanism of rotating speed control, is applied to hydraudynamic drive.

Fluid coupling has light start, operates steadily and protects many advantages such as motor, as the coupling of standard, is widely used in many smooth starting or bigger occasions of load variations fluctuation of needing.Owing to do not have blocking device between the pump impeller of fluid coupling and the turbine at present, so the transmission efficiency of fluid coupling when running well, transmission efficiency than machenical coupling is low, thereby has limited the above-mentioned advantage of fluid coupling, can not obtain performance in more conditions.

The purpose of this utility model make exactly fluid coupling can be in good time in running, automatically pump impeller and turbine are latched in together, overcome the lower disadvantage of fluid coupling transmission efficiency.

Be equipped with self-locking gear fluid coupling structure as shown in Figure 1: input axle sleeve 1, pump impeller tooth cover 2, pump impeller 5 and shell 7 are connected as a single entity, and turbine 8, cylinder body 10 and valve body 12 are connected as a single entity, and fix by flat key 15 and output shaft 16.The piston 9 that has tooth also interrelates with output shaft 16 by flat key 4.Oil guide pipe 13 is fixed on the support 17.

Fluid coupling prestart, piston 9 are in position as shown in Figure 1 under the effect of return spring 3, no rigidity connects between pump impeller 5 and the turbine 8.

After the fluid coupling starting, work fluid can be formed with the oil ring of certain pressure because of action of centrifugal force in shell 7, and these pressure oils can lead to the bottom of spool through the center hole of oil guide pipe 13 and output shaft 16.Before fluid coupling reaches declared working condition, be that the rotating speed of output shaft 16 is not when high, pressure oil can not make spool 14 move upward, the filler opening of cylinder body 10 and the oil outlet of valve body 12 communicate at this moment, do not have pressure oil to enter in the cylinder body 10, the tooth on pump impeller tooth cover 2 and the piston 9 still keeps separated state as shown in Figure 1.The starting process of fluid coupling that this device therefore is housed is the same with general fluid coupling, characteristics such as have light start, operate steadily.

Along with the rotating speed rising of output shaft 16, the centrifugal force of spool 14 increases.When the rotating speed of output shaft 16 reaches rated speed, the oil pressure of centrifugal force that spool 14 produces and spool bottom makes spool overcome the frictional force of 12 of the pressure of spring 11 and spool 14 and valve bodies and moves upward, thereby the passage between the filler opening of cut-out cylinder body 10 and the oil outlet of valve body 12, make pressure oil enter cylinder body 10, promote piston 9 to left movement, tooth on the piston 9 is meshed with the tooth that the pump impeller tooth overlaps on 2, input axle sleeve 1 is latched in output shaft 16 rigidly by piston 9 and flat key 4 like this, and the fluid coupling transmission is become direct transmission for machinery.

In running, when in case motor is about to stall because of overload, the rotating speed of output shaft 16 decreases, the pressure of the pressure of oil ring that is spool bottom also reduces in the centrifugal force of spool 14 and the shell 7, spool 14 moves downward under the thrust of spring 11, cut off the filler opening of cylinder body 10 and the passage of oil guide pipe 13, the passage of the filler opening of connection cylinder body 10 and the oil outlet of valve body 12.Because no pressure oil exists in the cylinder body 10, piston 9 moves right under the thrust of return spring 3, makes the tooth on the tooth disengaging pump impeller tooth cover 2 on the piston 9.At this moment, blocking device is inoperative, and the utility model fluid coupling with general again is the same.

Advantage behind employing the utility model is; it can organically combine fluid coupling transmission and mechanical transmission; promptly not only when state of starting operating and overload operating mode; still the characteristics that have light start and protection motor; and when running well, can improve the transmission efficiency of this transmission device of fluid coupling in the transmission system.Particularly when using the fluid coupling of big or middle power, can save the considerable energy.

In addition, because the slippage the when slippage the during action of this fluid coupling blocking device can be than general fluid coupling design conditions more greatly, this novel fluid coupling can have bigger oil-filled rate than general fluid coupling simultaneously, so the general fluid coupling of this novel fluid coupling and equal-wattage relatively, also has the radial dimension features of smaller.

Claims

1, a kind of novel fluid coupling is made up of pump impeller [5], turbine [8], input axle sleeve [1] and output shaft [16] etc., and feature of the present utility model is that the self-locking gear of being made up of " control valve " and " engaging mechanism " is housed in fluid coupling.

2,, it is characterized in that " control valve " is fixing by flat key (15) and output shaft (16) by the described fluid coupling of claim 1.

3,, it is characterized in that the interior pressure oil of fluid coupling is the center hole inflow " control valve " by fixing oil guide pipe (13) and output shaft (16) by the described fluid coupling of claim 1.

4,, it is characterized in that " control valve " be made up of valve body (12), spool (14) and spring (11) etc. by the described fluid coupling of claim 1.

5, by the described fluid coupling of claim 4, the position that it is characterized in that the spool (14) of " control valve ": when the rotating speed of output shaft (16) during less than rated speed, the position of spool (14) is motionless, and the oil circuit of oil guide pipe (13) and cylinder body (10) is obstructed; When the rotating speed of output shaft (16) reaches rated speed, move on the position of spool (14), the pressure oil in the oil guide pipe (13) flows into cylinder body (10).

6,, it is characterized in that " engaging mechanism " be made up of pump impeller tooth cover (2) and toothed piston (9) etc. by the described fluid coupling of claim 1.

7, by the described fluid coupling of claim 6, it is characterized in that toothed piston (9) interrelates by flat key (4) and output shaft (16).

8, by the described fluid coupling of claim 6, when it is characterized in that rotating speed when output shaft (16) is less than rated speed, toothed piston (9) separates with pump impeller tooth cover (2), when the rotating speed of output shaft (16) reached rated speed, toothed piston (9) and pump impeller tooth cover (2) were meshed.

9, by the described fluid coupling of claim 8, it is characterized in that being equipped with the return spring (3) that toothed piston (9) is separated with pump impeller tooth cover (2).