JPS6249026A - Volumetric rotary pump type clutch - Google Patents

Abstract

PURPOSE:To make possible to easily change the power transmission between input and output shafts coupled to both scroll members, by connecting the discharge side passage of a scroll type pump with the suction side passage thereof through an adjusting section. CONSTITUTION:Of scroll members in a scroll type pump, one input scroll member 5 is coupled with an input shaft 1, and the other output scroll member 6 is coupled with an output shaft 2. The output section 9 of a pump is connected with the input section 8 of the pump through a circulation passage 22 and a resistance adjusting section 27. A pressure damping section 28 is disposed in the outlet section 9. Accordingly, the circulating amount of fluid in the circulation passage 22 is changed by adjusting the resistance adjusting section, and therefore, it is possible to change power transmitted from the input shaft 1 to the output shaft 2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a clutch that can be used, for example, in a power transmission mechanism of an automobile, and more specifically to a clutch that operates on a principle basically similar to that of a positive displacement rotary pump. Regarding a positive displacement rotary pump type clutch.

(Prior Art) Conventionally, power transmission means using the principle of a rotary pump have been realized in various ways.Specific examples include a velocity pump with a fluid coupling or a torque transmission means. Examples include using it in converters and using positive displacement pumps in static pressure automatic transmissions.

(Problem to be solved by the invention) However, when a speed pump is used, it is not possible to completely cut off the power or transmit it completely (with 100% efficiency), and in the strict sense It is impossible to configure a clutch. On the other hand, when a positive displacement pump is used, the clutch, ie, the latch, can theoretically be configured to completely cut off and completely transmit the power. However, even when a general positive displacement pump is used, drag torque is actually generated due to the friction of the sliding parts, so it is impossible to construct a clutch suitable for use in automobiles and the like.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a spiral wall between one spiral wall and a circular motion between the walls. None, in a scroll type pump that performs pumping action by utilizing the volume change of each space formed between both sides, both walls are drawn freely rotating about the central axis, and one of each axis is input. In a structure in which the pump is connected to one shaft and the other shaft is connected to the output shaft, and the pump action is performed by the difference in rotation between the input shaft and the output shaft, the discharge side flow path of the pump is connected to the suction side flow path or is opened. At the same time, a variable throttle resistance and/or bulk elasticity adjusting section is provided in the flow path, and the flow path resistance and elasticity are changed to adjust clutch engagement, transmission torque capacity, and buffer characteristics. A positive displacement rotary pump type clutch having a scroll type mechanism is provided.

(Example of actual factory) Fig. 1 is a schematic cross-sectional view of an embodiment of the present invention, and Fig. 2 is a schematic cross-sectional view of an embodiment of the present invention.
It is a partial schematic view of l-111t plane. In FIG. 1, an input shaft 1 is connected to, for example, an automobile engine (not shown).
The output 1II12 is connected to a transmission (not shown). Both shafts 1.2 are connected by a clutch 3 according to the invention.

First, the basic principle of the clutch 3 will be explained with reference to FIG. The clutch 3 is constructed using the principle of a souffle-type pump with small torque changes, and includes a band-shaped input scroll 5 and an output scroll 6. The scrolls 5.6 each extend helically and are arranged in a housing 7 of closed construction. They are assembled in a space and are in contact with each other in a plurality of places (for example, M, N) so as to be able to slide freely, and a generally crescent-shaped fluid compression chamber Q is formed between them.Also, the housing The inside of 7 is filled with working fluid containing A-il and the like.

The human powered scroll 5 is configured to rotate with a short radius r relative to the output scroll 6. For example, portions a, b, and c of the input scroll 5 are indicated by two-dot chain lines A, B, and C with a radius r. It turns in a circular trajectory. As the incoming cask 1 call 5 rotates in this manner, the closed compression chamber Q moves from the outer periphery to the center of the housing 7 along the output scroll 6 while decreasing its volume. Therefore, as the input scroll 5 rotates, the fluid at the outer circumference (inlet part 8) in the housing γ is taken into the compression chamber Q, and is conveyed to the center part (outlet part 9) in the housing 7 while being compressed. . In addition, when the fluid is compressed and sent under pressure to the outlet 1 part 9 as described above, the output scroll 6
A reaction force is applied from the fluid to the input scroll 5, and the rotational force of the input scroll 5 is transmitted to the output scroll 6 via the fluid.

The above is the basic principle regarding power transmission by the clutch 3,
Next, an example of a specific structure will be explained with reference to FIG.

In FIG. 1, the housing 7 has an input scroll 5.6.
It has a cylindrical peripheral wall 12 that surrounds the peripheral wall 12 and annular end walls 13 and 14 provided at both ends of the peripheral wall 12, and the inner periphery of one end wall 13 is connected to the end of the output shaft 2. Output scroll 6
is fixed to the inner surface of the end wall 13 at one side edge. The human powered scroll 5 has a disk 1 on the side edge opposite to the end wall 13.
It is fixed at 5. The disc 15, the side edge of the output scroll 6, the end wall 13, and the side edge of the manual scroll 5 are in contact with each other through seals (not shown) so that they can move freely. The human powered scroll 5 is connected to the input shaft 1 via an eccentric cam mechanism 16, and when the human powered shaft 1 rotates, the eccentric cam mechanism 16 rotates the input cask 1 as described above. It looks like this.

The eccentric cam mechanism 16 is located between the disk 15 and the end wall 14, and the human power shaft 1 is fitted into the inner periphery of the end wall 14 via a seal 17. .

The human power shaft 1 has a passage hole 20 at its tip, and the tip I of the passage hole 20 communicates with the artificial part 8 on the outer periphery via a gap in the cam mechanism 16 or the like. The passage hole 20 is connected to one end of a circulation passage 22 via a joint 21 outside the housing γ. The output shaft 2 has a passage hole 25 at its tip, and the opening at the tip of the passage hole 25 communicates with the outlet 9 at the center of the housing 7. The passage hole 25 is connected to the other end of the circulation passage 22 via a joint 26.

A resistance adjustment section 27 consisting of a variable throttle or the like is provided in the middle of the wi ring oil passage 22. This resistance adjustment section 27 is connected to an operating mechanism such as a clutch pedal via a mechanism not shown. A pressure buffer section 28 is also connected to the circulation passage 22 . The pressure relief 11 section 28 includes a bellows-shaped damper 30 with a variable volume that communicates with the circulation passage 22, and a damper 30.
We look forward to reducing the volume! 5 iJ' spring 31 and reservoir tank 3 communicating with damper 30 via throttle 32
3.

According to the above-mentioned 4N structure, the rotational force of the input shaft 1 can be transmitted to the output shaft 2 via the fluid as stated above.

During this power transmission, the fluid taken into the compression chamber Q from the inlet part 8 is compressed and discharged to the outlet part 9, and the passage hole 2
5, the circulation passage 22, the passage hole 20, etc., and then the population part 8 again.
sent to. When the resistance adjustment unit 27 is operated to change the resistance of the circulation passage 22, the degree of compression of the fluid in the compression chamber Q changes, and depending on the degree of change, the degree of compression of the fluid in the compression chamber Q changes.
Either the power transmission from 11 to the output shaft 2 is cut off, or the power transmission efficiency is reduced, resulting in a 1/2 clutch state.

Also, if the rotational torque of the input shaft 1 changes suddenly, the compression chamber Q
A sudden load is applied to the fluid inside the spring 3.
1 is elastically deformed, the volume of the damper 30 changes, and sudden fluctuations in fluid pressure are prevented. Therefore, the torque transmitted to the output shaft 2 does not change suddenly.

(Effects of the Invention) As described above, according to the present invention, the clutch 3 is configured to transmit power using the principle of a positive displacement pump, and the fluid circulation passage 22 includes a resistance adjustment section 27 and a pressure buffer. Since the portion 28 is provided, it is possible to realize a clutch 3 that is capable of a desired half-clutch state or a disengaged state, and can sufficiently absorb torque vibrations. In such a latch 3, energy can be absorbed by the fluid and absorbed and dissipated as work or heat in another part, so a clutch 3 with a large energy capacity can be constructed. Since both the input section and the output section for compressing the fluid are rotary types, the relative speed of the sliding sections of both can be reduced, and an increase in drag torque due to friction can also be prevented.

[Brief explanation of the drawing]

Fig. 1 is a schematic cross-sectional view of an embodiment of the present invention, and Fig. 2 is a schematic cross-sectional view of the embodiment of the present invention.
~ff1g1ii'ii is a partial schematic diagram. DESCRIPTION OF SYMBOLS 1...Manpower shaft, 2...Output shaft, 3...Clutch, 5...Input scroll, 6...Output shaft []-le, 8...Inlet part, 9...Output l” part, 22...fluid circulation passage, 27
...Resistance adjustment part, 28...Pressure buffer part, Q...Fluid compression chamber Patent applicant Daikin Seisakusho Co., Ltd. t! -21.1 Figure 1'' Figure 2

Claims (1)

[Claims] Another spiral linear wall is provided between one spiral linear wall to perform circular motion between the walls, and to perform a pumping action by utilizing the volume change of each space formed between the two side surfaces. In a scroll type pump, both walls are configured to rotate freely about the central axis, and one of each shaft is connected to the input shaft, and the other shaft is connected to the output shaft, so that the rotation difference between the input and output shafts can be adjusted. When the discharge side flow path of the pump is connected to or opened to the suction side flow path, a restricting resistance and/or a variable volume elasticity adjusting section is provided in the flow path to reduce the flow path resistance and the volume elasticity. A positive displacement rotary pump clutch having a scroll-type mechanism that adjusts clutch engagement, transmission torque capacity, and buffer characteristics by changing elasticity.