CN108443351B

CN108443351B - Dynamic automatic clutch system and control method thereof

Info

Publication number: CN108443351B
Application number: CN201810198772.9A
Authority: CN
Inventors: 朱信平; 周常飞; 史春祥; 宋相坤; 郭岱; 张斌; 李庆亮; 胡俊; 张晓永; 刘凯; 盛永林; 王广; 李辉; 阚锦彪; 黄秋来; 朱红
Original assignee: Tiandi Shanghai Mining Equipment Technology Co Ltd; Tiandi Science and Technology Co Ltd Shanghai Branch
Current assignee: Tiandi Shanghai Mining Equipment Technology Co Ltd; Tiandi Science and Technology Co Ltd Shanghai Branch
Priority date: 2018-03-12
Filing date: 2018-03-12
Publication date: 2020-05-29
Anticipated expiration: 2038-03-12
Also published as: CN108443351A

Abstract

The invention discloses a dynamic automatic clutch system, which is arranged between a transmission shaft and a driven device, wherein the driven device is connected with the clutch system through a driving connecting piece, and the dynamic automatic clutch system comprises: the coupling disc comprises an end part and a side part, a flange is formed at the tail end of the side part, a plurality of outer friction plates are connected to the inner wall of the side part in a sliding mode, the driving connecting piece extends into the side part, and a plurality of inner friction plates are arranged on the outer wall of the driving connecting piece; the fixed seat is sleeved outside the connecting disc, and a first bearing is arranged between the fixed seat and the connecting disc; the conductor comprises a base part and a middle protruding part extending from the base part to the outer friction plate, and a guide body and an elastic body are arranged between the base part and the flange; and the cavity is covered between the fixed seat and the driven device, a valve body is arranged outside the cavity, and a piston is arranged in the cavity. The invention also discloses a control method of the clutch system. The clutch system and the control method facilitate reliable clutch.

Description

Dynamic automatic clutch system and control method thereof

Technical Field

The invention relates to the field of clutch systems, in particular to a dynamic automatic clutch system and a control method matched with the system.

Background

And the clutch system is connected between the transmission shaft and the driven device and is used for realizing the connection or the disconnection between the transmission shaft and the driven device so as to realize the power transmission function. Specifically, when the clutch system is engaged, the transmission shaft can realize power transmission with the driven device; when the clutch system is separated, the transmission shaft and the driven device do not realize power transmission, and at the moment, the driven device cannot rotate.

In the prior art, the engagement or disengagement of the clutch system is usually required at idle or stop, but collision or impact is generated, noise is generated, and the reliability of the engagement or disengagement is also affected.

Disclosure of Invention

The invention aims to provide a dynamic automatic clutch system which can realize stable and reliable clutch under the rotating working state of a transmission shaft.

In order to solve the technical problems, the invention adopts the following technical scheme: a dynamic automatic clutching system disposed between a drive shaft and a driven device, the driven device connected to the clutching system by a drive connection, comprising:

the coupling disc comprises an end part fixedly connected with the transmission shaft and a side part extending from the end part, a flange is formed at the tail end of the side part, a plurality of outer friction plates are connected to the inner wall of the side part in a sliding manner, the driving connecting part extends into the side part, and a plurality of inner friction plates which are arranged in a staggered manner with the outer friction plates are arranged on the outer wall of the driving connecting part;

the fixed seat is sleeved outside the connecting disc, and a first bearing is arranged between the fixed seat and the connecting disc;

a conductor including a base portion and an intermediate protrusion portion extending from the base portion toward the outer friction plate, a guide body for the conductor to move along and an elastic body for applying an elastic force to the conductor in a direction away from the coupling disc being provided between the base portion and the flange; and the combination of (a) and (b),

the cavity is covered between the fixed seat and the driven device, a valve body is arranged outside the cavity, a piston is arranged in the cavity, and when the valve body is communicated with hydraulic oil, the piston pushes the conductor to enable the outer friction plate and the inner friction plate to transmit power; when the valve body cuts off hydraulic oil, the elastic body pushes the piston to move in the reverse direction, and the outer friction plate is separated from the inner friction plate and does not transmit power any more.

Further, the contact area and the number of the inner friction plates and the outer friction plates are determined according to the load size design.

Further, the first bearing is a thrust bearing.

Further, the guide body is a plurality of, along the flange with the circumference of basal portion is evenly arranged, the head end of guide body pass the conductor and with flange threaded connection, the interlude of guide body is for the optical axis that is used for the direction, the terminal radial bulge that is used for spacing that forms of guide body.

Furthermore, the number of the elastic bodies is multiple, the elastic bodies are uniformly arranged along the circumferential direction of the flange and the base, the elastic bodies are springs, blind holes are formed in the flange and the base, and two ends of each spring are correspondingly located in the blind holes.

Further, one end of the cavity, which is close to the driven device, is provided with an axial protruding portion extending towards the direction of the conductor, the conductor is provided with an annular groove, and a second bearing is arranged between the axial protruding portion and the annular groove.

Further, the second bearing is a thrust bearing.

Further, the cavity is provided with an annular slide way for the piston to slide along outside the axial protruding part, the valve body is communicated with the annular slide way through a flow path, and the piston can push the second bearing to move when being driven.

Further, the cavity is connected with the driven device through a flange.

Further, the valve body is a hydraulic valve or a solenoid valve, and the valve body is configured to recognize one or more of an action, a pressure, or a flow signal, and to turn on or off hydraulic oil.

In addition, the invention discloses a control method of a dynamic automatic clutch system, which is used for controlling the dynamic automatic clutch system, and comprises the following steps:

in the engaged state, the first and second engaging portions are engaged,

step one, opening a valve body, and injecting hydraulic oil into a cavity;

step two, the hydraulic oil pushes the piston to move, so that the conductor is pushed to act;

step three, the outer friction plate is pushed by the conductor, so that friction force is generated between the outer friction plate and the inner friction plate, and then the inner friction plate drives the driving connecting piece to synchronously rotate, so that the driven device is in a joint state with the transmission shaft;

the state of the device is separated from the state,

step one, closing the valve body, and stopping injecting hydraulic oil into the cavity;

secondly, the elastomer pushes the conductor, and then pushes the piston to move reversely;

and step three, the outer friction plate is separated from the inner friction plate, the friction force disappears, and the driven device is in a separated state with the transmission shaft.

Compared with the prior art, the invention has the beneficial effects that: the transmission shaft and the driven device can be jointed more stably by the mode that the transmission body overcomes the elastic force to push the outer friction plate to be jointed with the inner friction plate and transmit power by controlling the movement of the piston hydraulically; when the separation is needed, the hydraulic oil is stopped to be supplied, the conductor is separated from the outer friction plate under the action of elastic force, at the moment, the outer friction plate cannot conduct power with the inner friction plate, and the driven device stops moving. The invention is controlled by hydraulic signals, the process can not generate collision or impact, and the system is stable and reliable. Utilize thrust bearing, convert the rotatory working method into simple piston working method for the atress mode of inside and outside friction disc is pure thrust and changes frictional force.

Drawings

FIG. 1 is a schematic illustration of the installation of the dynamic automatic clutch system of the present invention;

FIG. 2 is a schematic diagram of one embodiment of a dynamic automatic clutching system of the present invention.

Reference numerals

1-a transmission shaft; 2-a coupling disc; 201-end; 202-side part; 203-a flange; 3-fixing the base; 4-outer friction plate; 5-a first bearing; 6-a spring; 7-a pipeline; 8-a control system; a 9-conductor; 901-a base; 902-middle tab; 10-a cavity; 1001-axial projection; 11-a second bearing; 12-a piston; 13-a transitional coupling block; 14-a sleeve; 15-a water pump; 16-a flange; 17-a guide body; 18-inner friction plate; 19-valve body.

Detailed Description

The invention is described in further detail below with reference to the figures and the examples, but without limiting the invention.

Referring to fig. 1, the clutch system c is coupled to a transmission shaft of a transmission device a (e.g., a motor) through a coupling mechanism b at one end thereof, and is connected to a driven device through a driving connection member, which will be described as a water pump d. The control system f is connected with the clutch system c through a hydraulic pipeline e, a transmission shaft of the transmission device a is in a rotating state, and the control system f gives out a control signal according to conditions to control the on-off action and the on-off action of the transmission shaft and an input shaft of the water pump d, wherein the 'off' state is that the input shaft of the water pump d is not jointed with the transmission shaft, the input shaft of the water pump d does not rotate, and the water pump d is in a stop state; the 'closed' state is that the input shaft of the water pump d is jointed with the transmission shaft of the transmission device, the input shaft of the water pump d and the transmission shaft rotate synchronously, and the water pump d is in a working state.

Referring to fig. 2, the dynamic automatic clutch system of the present invention is disposed between the transmission shaft 1 and the water pump 15 as a driven device, and the driven device is connected to the clutch system through a driving connection member, as mentioned above, the driven device is selected as the water pump 15, and the input shaft of the water pump 15 is connected to the driving connection member. The driving connecting piece comprises a sleeve 14 and a transition connecting block 13, wherein the diameter of one end (namely the left end) of the sleeve 14 positioned on the left side in the drawing is smaller than that of one end (namely the right end) positioned on the right side in the drawing, the left end of the sleeve 14 is fixedly connected with the transition connecting block 13, and the right end of the sleeve 14 is connected with an input shaft of a water pump 15 through a key. The clutch system includes the coupling plate 2, the fixing seat 3, the conductor 9, the cavity 10, and the like, which will be described separately below.

As shown in fig. 2, the coupling disc 2 includes an end portion 201 fixedly connected to the drive shaft 1 and a side portion 202 extending from the end portion 201, as shown in the figure, the end portion 201 is fixedly connected to the drive shaft 1, the side portion 202 extends from the end portion 201 to the right in the figure, and the end of the side portion 202 forms a flange 203, and the flange 203 can facilitate the connection of the coupling disc 2 to a conductor 9 and the like described later. A plurality of outer friction plates 4 are slidably connected to the inner wall of the side portion 202, and an abutting member may be provided in the side portion 202 near the end portion 201 to limit the moving area of the outer friction plates 4. In one case, the plurality of outer friction plates 4 may be integrally formed, one end of which is fitted to the inner wall of the side portion 202 and is slidable in the left-right direction in the drawing with respect to the inner wall, or may be divided into a plurality of pieces, each of which is slidably connected to the inner wall of the side portion 202. Extending into the side portion 202 is a drive connection whose outer wall, here the outer wall of the transition coupling piece 13, is provided with a plurality of inner friction plates 18 which are interleaved with the outer friction plates 4, i.e. the outer friction plates 4 are adjacent to the inner friction plates 18 rather than being similarly adjacent (either the outer friction plates 4 or the inner friction plates 18). Similarly, the plurality of inner friction plates 18 may be an integral part which is fixedly arranged on the driving connecting member, and if the plurality of outer friction plates 4 are also an integral part, the outer friction plates 4 can respectively abut against the inner friction plates 18 when being driven to move, so as to transmit power. In addition, the inner friction plates 18 may be split type (corresponding to the outer friction plates 4 being split type), and are respectively connected to the driving connecting member in a sliding manner, so that when being pushed by the outer friction plates 4, all the outer friction plates 4 are in close contact with the inner friction plates 18. Preferably, as shown in the figure, the inner friction plate 18 is arranged between two adjacent outer friction plates 4, and when the outer friction plates 4 are pushed to move, the outer friction plates can be well attached to the inner friction plate 18 and tightly contacted with the inner friction plate, so that friction force is generated, and power transmission is realized. The contact area and the number of the outer friction plates 4 and the inner friction plates 18 can be accurately calculated and determined according to the load force or the load size and the like.

The fixing seat 3 is sleeved outside the connecting disc 2, the fixing seat 3 can be fixed on a certain fixedly arranged shell on one side of the transmission shaft 1, and the fixing seat 3 does not rotate. A first bearing 5 is arranged between the fixed seat 3 and the coupling disc 2, and further, the first bearing 5 is a thrust bearing which can counteract the axial force of the system, so that the clutch system can be used as an independent unit.

The conductor 9 comprises a base 901 and a middle protruding part 902 extending from the base 901 to the outer friction plate 4, a guide body 17 used for moving the conductor 9 along and an elastic body used for applying elastic force to the conductor 9 in a direction away from the coupling disc 2 are arranged between the base 901 and the flange 203. Specifically, the guide bodies 17 are plural and are uniformly arranged along the circumferential direction of the flange 203 and the base 901, the head ends of the guide bodies 17 penetrate through the conductor 9 and are in threaded connection with the flange 203, the middle section of the guide bodies 17 is an optical axis for guiding, and the tail ends of the guide bodies 17 form radial protrusions for limiting, which can limit the axial movement section of the conductor 9 and avoid the separation of the conductor 9 from the coupling disc 2. Similarly, the number of elastic bodies is plural, and the elastic bodies are uniformly arranged along the circumferential direction of the flange 203 and the base 901, and the elastic bodies may be arranged alternately with the guide bodies 17, or arranged in different circumferential dimensions. As a case, the elastic body is selected as a spring 6, blind holes are formed in the flange 203 and the base 901, two ends of the spring 6 are correspondingly located in the blind holes, and the spring 6 applies a pre-tightening force to the conductive body 9, so that the conductive body 9 moves away from the coupling plate 2. The parameters and number of the springs 6 can be calculated according to the required pretightening force. The pre-tensioning force acts to place the system in an "off" condition while providing the basic conditions of use of the bearing.

And a cavity 10 which is covered between the fixed base 3 and the driven device and constitutes an outer shell of the conductor 9 and the like. A valve body 19 is arranged on the cavity 10, the valve body 19 is connected with the pipeline 7 and the control system 8, and the valve body 19 and the pipeline 7 provide hydraulic signals. The valve body 19 may be a pilot operated valve or a solenoid valve configured to recognize one or more of an action, pressure or flow signal and turn on or off the hydraulic oil, thereby achieving control by hydraulic pressure or a digital signal. A piston 12 is arranged in the cavity 10, and the piston 12 slides axially under the control of a hydraulic signal or the pretightening force of an elastic body. When the valve body 19 is connected with hydraulic oil, the piston 12 pushes the conductor 9, the conductor 9 can overcome the pretightening force of the elastic body to move towards the direction of the connecting disc 2, so that the outer friction plate 4 and the inner friction plate 18 transmit power, namely, the outer friction plate 4 and the inner friction plate 18 are tightly attached to generate friction force, at the moment, the outer friction plate 4 drives the inner friction plate 18 to rotate together, and the inner friction plate 18 drives the transition connecting block 13 to rotate, so that the input shaft of the water pump 15 is driven to rotate. On the contrary, when the hydraulic signal is no pressure, the conductor 9 pushes the piston 12 to slide reversely under the action of the pre-tightening force of the elastic body, at this time, the outer friction plate 4 is separated from the inner friction plate 18, the driving force of the input shaft of the water pump 15 disappears, and the water pump 15 stops rotating.

One end of the cavity 10 close to the water pump 15 is provided with an axial protrusion 1001 extending towards the conductor 9, the conductor 9 is provided with an annular groove, a second bearing 11 is arranged between the axial protrusion 1001 and the annular groove, and when the piston 12 acts, the piston 12 contacts with the second bearing 11 and pushes the second bearing 11 to move, so that acting force is applied to the conductor 9. Further, the second bearing 11 is a thrust bearing. To facilitate the positioning of the piston 12, the chamber 10 is provided, outside the axial projection 1001, with an annular slide for the piston 12 to slide along, the valve body 19 communicating with the annular slide through a flow path, the piston 12 being able to push the second bearing 11 to move when it is actuated. Conversely, when the piston 12 is not driven, the outer friction plates 4 are separated from the inner friction plates 18 and no power/friction is transmitted, as the force of the springs 6 moves in the opposite direction.

As mentioned above, the cavity 10 is covered between the fixed seat 3 and the water pump 15 as the driven device, specifically, the left end of the cavity 10 is connected to the fixed seat 3 through a flange and other structures, and the right end of the cavity 10 is connected to the water pump 15 as the driven device through the flange 16 shown in the figure.

In addition, the invention discloses a control method of a dynamic automatic clutch system, which is used for controlling the dynamic automatic clutch system of any one of the above parts, and comprises the following steps:

step one, the valve body 19 is opened, and hydraulic oil is injected into the cavity 10.

Before hydraulic oil is injected, the transmission shaft 1 rotates to drive the connecting disc 2, the outer friction plate 4, the spring 6, the guide body 17, the conductor 9, the first bearing 5 and one end of the second bearing 11 to rotate. After an opening signal is given to the valve body 19, hydraulic oil is injected into the chamber 10.

And step two, the hydraulic oil pushes the piston 12 to move, so that the conductor 9 is pushed to act.

The hydraulic oil in the step one starts to generate hydraulic pressure on the piston 12, and the piston 12 drives the second bearing 11 and the conductor 9 to axially move towards the direction close to the coupling disc 2 along the guide section of the guide body 17 after overcoming the pretightening force of the spring 6.

Step three, the conductor 9 pushes the outer friction plate 4, so that the outer friction plate 4 and the inner friction plate 18 transmit power, and then the inner friction plate 18 drives the driving connecting piece to move (namely, synchronously rotate), so that the water pump 15 serving as a driven device is in a joint state with the transmission shaft 1.

The outer friction plate 4 and the inner friction plate 18 transmit power, that is, the outer friction plate 4 is in close contact with the inner friction plate 18 to generate friction force, so that the transition connecting block 13 is driven to rotate, the sleeve 14 and the input shaft of the water pump 15 are driven to rotate, and the water pump 15 is started to work.

The above is the starting step of the water pump 15, and the subsequent stopping step is:

and step four, giving a signal for closing the water pump 15 by the valve body 19, and enabling the hydraulic pressure to return to zero.

At this time, under the action of the pretightening force of the spring 6, the conductor 9 drives the second bearing 11 and the piston 12 to move reversely along the guide section of the guide body 17, the inner friction plate 18 is separated from the outer friction plate 4, the torque of the input shaft of the water pump 15 is reduced to zero, and the water pump 15 stops working.

The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.

Claims

1. A dynamic automatic clutch system arranged between a transmission shaft and a driven device, wherein the driven device is connected with the clutch system through a driving connecting piece, and the dynamic automatic clutch system is characterized by comprising:

the fixed seat is sleeved outside the connecting disc, a first bearing is arranged between the fixed seat and the connecting disc, and the first bearing is in contact with the flange;

a conductor including a base portion and a middle protrusion portion extending from the base portion toward the outer friction plate, the conductor being provided with an annular groove; and the combination of (a) and (b),

a cavity which is covered between the fixed seat and the driven device, a valve body is arranged outside the cavity, a piston is arranged in the cavity, one end of the cavity, which is close to the driven device, is provided with an axial protruding part which extends towards the direction of the conductor,

wherein a second bearing is arranged between the axial protrusion and the annular groove,

the first bearing and the second bearing are both thrust bearings,

a guide body for the conductor to move along and an elastic body for applying an elastic force to the conductor in a direction away from the coupling disk are provided between the base and the flange so that the elastic body can apply a thrust force to the first bearing and the second bearing on both sides at the same time,

when the valve body is communicated with hydraulic oil, the piston pushes the conductor to enable the outer friction plate and the inner friction plate to transmit power; when the valve body cuts off hydraulic oil, the elastic body pushes the piston to move in the reverse direction, and the outer friction plate is separated from the inner friction plate and does not transmit power any more.

2. The dynamic automatic clutch system according to claim 1, wherein the contact areas and the respective numbers of the inner friction plates and the outer friction plates are determined according to a load size design.

3. The dynamic automatic clutch system according to claim 1, wherein the guide bodies are plural and arranged uniformly along a circumferential direction of the flange and the base, a head end of the guide body passes through the conductor and is screwed with the flange, a middle section of the guide body is an optical axis for guiding, and a tail end of the guide body forms a radial protrusion for limiting.

4. The dynamic automatic clutch system according to claim 1, wherein the number of the elastic bodies is plural, the elastic bodies are uniformly arranged along the circumferential direction of the flange and the base, the elastic bodies are springs, blind holes are provided on the flange and the base, and two ends of the springs are correspondingly located in the blind holes.

5. The dynamic automatic clutch system according to claim 1, wherein the cavity is provided with an annular slide way outside the axial protrusion for the piston to slide along, the valve body is communicated with the annular slide way through a flow path, and the piston can push the second bearing to move when being driven.

6. The dynamic automatic clutching system of claim 1, wherein the cavity is connected to the driven device by a flange.

7. The dynamic automatic clutching system of claim 1, wherein the valve body is a hydraulic valve or a solenoid valve, the valve body configured to recognize one or more of an action, pressure, or flow signal and turn hydraulic oil on or off.