阅读说明：本技术 一种离合器及其工作方法 (Clutch and working method thereof ) 是由 刘建平 于 2021-07-29 设计创作，主要内容包括：本发明涉及一种离合器,包括离合器本体,离合器本体的第一外板和第二外板中间设置有与输入轴同步旋转的内板,内板的左右端面对称设置有环形滚道,环形滚道上均沿圆周均布有多个首尾相接的坡道,两侧坡道左右对称且与同侧外板上圆周嵌设的多个滚动体滚动配合。由于第一外板和第二外板上的滚动体在内板两侧左右对称,坡道对称且连续,所以内板各受力点左右平衡,内板厚度可以做得较小,降低内板转动惯量,适用范围更广。(The invention relates to a clutch, which comprises a clutch body, wherein an inner plate which rotates synchronously with an input shaft is arranged between a first outer plate and a second outer plate of the clutch body, the left end surface and the right end surface of the inner plate are symmetrically provided with annular raceways, a plurality of ramps which are connected end to end are uniformly distributed on the annular raceways along the circumference, and the ramps on the two sides are bilaterally symmetrical and are in rolling fit with a plurality of rolling bodies which are embedded on the outer plate on the same side along the circumference. Because the rolling elements on the first outer plate and the second outer plate are bilaterally symmetrical on the two sides of the inner plate, and the ramps are symmetrical and continuous, the stress points of the inner plate are balanced leftwards and rightwards, the thickness of the inner plate can be smaller, the rotational inertia of the inner plate is reduced, and the application range is wider.)

1. A clutch, characterized in that: the clutch comprises a clutch body, an inner plate which rotates synchronously with an input shaft is arranged between a first outer plate and a second outer plate of the clutch body, annular raceways are symmetrically arranged on the left end face and the right end face of the inner plate, a plurality of ramps which are connected end to end are uniformly distributed on the annular raceways along the circumference, and the ramps on the two sides are bilaterally symmetrical and are in rolling fit with a plurality of rolling bodies which are embedded on the outer plate on the same side along the circumference.

2. The clutch of claim 1, wherein: the end faces, close to the inner plate, of the first outer plate and the end faces, close to the second outer plate, of the second outer plate are uniformly distributed with a plurality of rolling element groove groups along the circumference, each rolling element groove group comprises at least one rolling element groove, and a rolling element is embedded in each rolling element groove; the rolling bodies of the first outer plate and the second outer plate correspond to the rolling body grooves one to one, and the rolling bodies are bilaterally symmetrical by taking the inner plate as a center line.

3. The clutch of claim 2, wherein: the shape and size of the rolling body and the rolling body groove are matched, the rolling body can rotate around the axis of the rolling body in the rolling body groove, the rolling body is a sphere, a cylinder or a cone, and correspondingly, the rolling body groove is an arc groove, a cylinder groove or a cone groove.

4. The clutch of claim 1, wherein: each ramp is bilaterally symmetrical by taking a plane passing through the axis of the inner plate and radially passing through the straight line of the two peaks as a center.

5. The clutch of claim 4, wherein: the shape of the ramp is adapted to the shape of the rolling body; no matter which direction the input shaft rotates, if one of any two adjacent rolling bodies is on an upward slope on a symmetrical slope, the other is on a downward slope on the other side, the number of the slopes is equal to or not equal to the number of the rolling bodies, the number of the rolling bodies is n1, n1 is an even number, the number of the slopes is n2, n2=1/2 × n1 × n, and n is an integer, so that the inner plate, the first outer plate and the second outer plate of the clutch are stressed evenly and have small fluctuation.

6. The clutch of claim 1, wherein: the first outer plate and the second outer plate are respectively connected with the clutch drum in a sliding mode through outer splines, the clamp spring is arranged on the right side of the second outer plate and used for limiting the maximum distance of the second outer plate moving rightwards relative to the clutch drum, the clutch hub is arranged on the inner side of the inner plate, the inner plate of the clutch is connected with the clutch hub in a sliding mode through inner splines, or the inner plate is directly fixedly connected with the clutch hub.

7. The clutch of claim 6, wherein: an elastic body is arranged on the left side of the first outer plate, two ends of the elastic body are respectively abutted against the first outer plate of the clutch and the clutch drum, and the elastic body is a spiral compression spring or a wave spring or a belleville spring or a rubber block; in the initial state, the first outer plate and the second outer plate press all or part of the rolling bodies under the action of the elastic force of the elastic body, and the inner plate is limited to rotate relative to the first outer plate and the second outer plate under the action of the slope; a baffle is arranged at the lower right side of the first outer plate and is fixedly connected with the shell, and the baffle limits the maximum distance of the right movement of the first outer plate; a push disc is arranged on the left side of the clutch drum and is in sliding connection with the shell through an outer spline; the left side of the push disc is provided with an actuating device which is a hydraulic device, an air pressure device, an electromagnetic device, a motor device or a cam device; the clutch hub is fixedly connected with the input shaft or is in sliding connection through a spline, the clutch drum is fixedly connected with the output shaft or is in sliding connection through a spline, and when the clutch is combined, the power of the input shaft is transmitted to the output shaft through the clutch hub, the inner plate, the rolling body, the first outer plate, the second outer plate and the clutch drum in sequence; when the clutch is separated, the inner plate rotates relative to the first outer plate and the second outer plate, and the clutch does not transmit power.

8. The clutch of claim 7, wherein: the depth of the rolling body grooves on the first outer plate and the second outer plate is not more than the maximum diameter of the rolling body, and the height from the slope valley to the slope peak of all the slopes is not more than the maximum diameter of the rolling body, so that the processing is convenient, and the friction between the inner plate and the first outer plate or the second outer plate is avoided; the right shift distance of the second outer plate is less than the depth of the rolling body groove so as to prevent the rolling body from sliding out of the rolling body groove.

9. The clutch of claim 7, wherein: after the clutch is installed, all rolling bodies are positioned in the middle of a ramp slope, the initial acting force of the elastic body and the push plate on the rolling bodies through the first outer plate and the second outer plate in the rotating direction of the inner plate is N0, the acting force of the elastic body and the push plate on the rolling bodies through the first outer plate and the second outer plate in the rotating direction of the inner plate is variable, part of the rolling bodies are Nmax when the rolling bodies are at a slope peak, the acting force of an input shaft on the rolling bodies through the clutch hub and the inner plate in the rotating direction of the inner plate is Tt and is maximum Tmax, under the condition of not considering gravity and friction, N0> Tmax, when Nt < Tt, the clutch is in a separated state, when Nt =0, the clutch is in a completely separated state, when Nt > Tt, the clutch is in a combined state, when the inner plate rotates relative to the first outer plate and the second outer plate and Nt = Tt, the clutch is kept in the separated state, when the inner plate is not rotated relative to the first and second outer plates and Nt = Tt, the clutch remains engaged.

10. A method of operating a clutch according to any one of claims 1 to 9, characterised by the steps of:

(1) in an initial state, the piston cavity is not pressurized, the push disc presses the piston to the leftmost position under the action of the return spring, the clutch drum is not acted by an acting force from the push disc, the elastic body pushes the rolling body through the first outer plate rightwards, the rolling body is extruded by the clutch drum, the snap spring and the second outer plate leftwards in sequence, the rolling bodies on the first outer plate and the second outer plate cannot rotate relative to the inner plate under the blocking of a ramp, the clutch is in a combined state, N0 is greater than Tt, and at the moment, if the input shaft has power input, the power is transmitted to the output shaft through the clutch hub, the inner plate, the rolling body, the first outer plate, the second outer plate and the clutch drum in sequence;

(2) when the pressure in the piston cavity is gradually increased, the pressure pushes the piston to move right, so that the clutch drum is pushed by the push disc to move right, after the first outer plate is abutted against the baffle, the first outer plate cannot move right continuously, then the piston pushes the clutch drum through the push disc to compress the elastomer, the clutch drum drives the clamp spring to move right continuously to a designed limit position, the input shaft drives the inner plate to rotate, the left ramp and the right ramp extrude rolling bodies on the left side and the right side, the second outer plate moves right to the clamp spring to be blocked, and the inner plate moves right to have a certain gap with the first outer plate and the second outer plate, so that the rolling bodies are not extruded; in the process, when Nt is not equal to 0, the clutch is in a sliding state, the inner plate can rotate relative to the first outer plate and the second outer plate with small displacement, when Nt =0, the clutch is in a completely separated state, the inner plate can rotate relative to the first outer plate and the second outer plate without being constrained, and the input shaft cannot transmit power through the clutch;

(3) when the pressure in the piston cavity is gradually reduced, the clutch drum reversely pushes the push disc to move left under the action of the elastic body, so that the push disc pushes the piston or moves left along with the piston until the clutch is completely combined, the push disc pushes the piston to the leftmost position under the action of the return spring, in the process, along with the gradual reduction of the pressure of the push disc on the clutch drum, Nt is gradually increased, when Nt is less than or equal to Tt, the clutch is in a slipping state, the inner plate can rotate relatively to the first outer plate and the second outer plate in a smaller displacement mode, when Tt is less than Nt, the clutch is in a combined state, the inner plate cannot rotate relatively to the first outer plate and the second outer plate, and the input shaft sequentially transmits power to the output shaft through the clutch hub, the inner plate, the rolling body, the first outer plate, the second outer plate and the clutch drum; because the ramp is symmetrical and continuous, and one of any two adjacent rolling bodies is at the crest, and the other is at the valley, when the rolling bodies go down the slope in the process of combining or separating the clutch, the other rolling body must go up the slope, so that half of the rolling bodies in the process of combining and separating the clutch push the first outer plate and the second outer plate to rotate in the same direction or are pushed by the first outer plate and the second outer plate to rotate in the same direction, the gear shifting process is smooth, the impact or the pause and pause are reduced, and the gear shifting can be normally and smoothly carried out when the input shaft rotates in the reverse direction.

Technical Field

The invention relates to a clutch and a working method thereof, and relates to the field of new energy automobile transmission clutches.

Background

In the field of traditional clutches, in order to reduce the power requirement on a clutch actuator and reduce the volume and cost of the actuator, a boosting technology that a rolling body rolls on a rolling ramp to generate a cam effect is applied, the rolling body rolls from low to high on the ramp to generate extrusion on a friction byproduct at the back side of the ramp, the pressure of a friction pair is increased, and the power requirement on the actuator is reduced, but the power transmission of a driving part and a driven part is still transmitted through the friction pair, the cost of the friction pair is not reduced, a large amount of heat is generated in the friction pair sliding-grinding process, abrasive dust is not reduced, and the clutch, the transmission or related mechanical equipment is adversely affected; in addition, prior art's roll way all sets up a plurality of ramps and a plurality of ramps are discontinuous on the base plate basically, the rolling element corresponds with roll way one-to-one, one-way effect, restriction application range, if the transmission shaft is followed in the removal of rolling element on the ramp, use and must lead to the fact vice input/output terminal rotational speed of friction not have sufficient synchronization process on the automotive transmission clutch, thereby cause the impact of shifting, new energy automobile driving motor rotational speed is high, the fender position is few, the fender position speed difference is big, the vice input/output terminal rotational speed of shift process friction does not have sufficient synchronization process and strikes more seriously, if utilize the removal of motor or electromagnetic means control rolling element, then the cost increases, the control degree of difficulty of shifting increases.

Disclosure of Invention

In view of the shortcomings of the prior art, the technical problem to be solved by the invention is to provide a clutch and a working method thereof.

In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a clutch, includes the clutch body, is provided with the inner panel with input shaft synchronous revolution in the middle of the first planking of clutch body and the second planking, and the terminal surface symmetry is provided with annular raceway about the inner panel, all has a plurality of end to end's ramp along the circumference equipartition on the annular raceway, and both sides ramp bilateral symmetry just with the homonymy planking on the circumference inlay a plurality of rolling element roll cooperations of establishing.

Preferably, a plurality of rolling element groove groups are uniformly distributed on the end faces, close to the inner plate, of the first outer plate and the second outer plate along the circumference, each rolling element groove group comprises at least one rolling element groove, and a rolling element is embedded in each rolling element groove; the rolling bodies of the first outer plate and the second outer plate correspond to the rolling body grooves one to one, and the rolling bodies are bilaterally symmetrical by taking the inner plate as a center line.

Preferably, the shape and size of the rolling body and the rolling body groove are matched, the rolling body can rotate around the axis of the rolling body in the rolling body groove, the rolling body is a sphere, a cylinder or a cone, and correspondingly, the rolling body groove is an arc groove, a cylinder groove or a cone groove.

Preferably, each ramp is bilaterally symmetrical with respect to a plane passing through the axis of the inner plate and radially passing through the two peaks.

Preferably, the shape of the ramp is adapted to the shape of the rolling body; no matter which direction the input shaft rotates, if one of any two adjacent rolling bodies is on an upward slope on a symmetrical slope, the other is on a downward slope on the other side, the number of the slopes is equal to or not equal to the number of the rolling bodies, the number of the rolling bodies is n1, n1 is an even number, the number of the slopes is n2, n2=1/2 × n1 × n, and n is an integer, so that the inner plate, the first outer plate and the second outer plate of the clutch are stressed evenly and have small fluctuation.

Preferably, the first outer plate and the second outer plate are slidably connected with the clutch drum through outer splines respectively, a snap spring is arranged on the right side of the second outer plate and used for limiting the maximum distance of the right movement of the second outer plate relative to the clutch drum, a clutch hub is arranged on the inner side of the inner plate, and the inner plate of the clutch is slidably connected with the clutch hub through inner splines or the inner plate is directly fixedly connected with the clutch hub.

Preferably, the left side of the first outer plate is provided with an elastic body, two ends of the elastic body are respectively abutted against the first outer plate of the clutch and the clutch drum, and the elastic body is a spiral compression spring or a wave spring or a belleville spring or a rubber block; in the initial state, the first outer plate and the second outer plate press all or part of the rolling bodies under the action of the elastic force of the elastic body, and the inner plate is limited to rotate relative to the first outer plate and the second outer plate under the action of the slope; a baffle is arranged at the lower right side of the first outer plate and is fixedly connected with the shell, and the baffle limits the maximum distance of the right movement of the first outer plate; a push disc is arranged on the left side of the clutch drum and is in sliding connection with the shell through an outer spline; the left side of the push disc is provided with an actuating device which is a hydraulic device, an air pressure device, an electromagnetic device, a motor device or a cam device; the clutch hub is fixedly connected with the input shaft or is in sliding connection through a spline, the clutch drum is fixedly connected with the output shaft or is in sliding connection through a spline, and when the clutch is combined, the power of the input shaft is transmitted to the output shaft through the clutch hub, the inner plate, the rolling body, the first outer plate, the second outer plate and the clutch drum in sequence; when the clutch is separated, the inner plate rotates relative to the first outer plate and the second outer plate, and the clutch does not transmit power.

Preferably, the depth of the rolling body groove on the first outer plate and the second outer plate is not more than the maximum diameter of the rolling body, and the height from the slope valley to the slope peak of all the slopes is not more than the maximum diameter of the rolling body, so that the processing is convenient, and the friction between the inner plate and the first outer plate or the second outer plate is avoided; the right shift distance of the second outer plate is less than the depth of the rolling body groove so as to prevent the rolling body from sliding out of the rolling body groove.

Preferably, after the clutch is installed, all the rolling bodies are positioned in the middle of the slope, the initial acting force of the elastic body and the push plate on the rolling bodies in the rotating direction of the inner plate through the first outer plate and the second outer plate is N0, the acting force of the elastic body and the push plate on the rolling bodies in the rotating direction of the inner plate through the first outer plate and the second outer plate is variable during the slope rolling process of the rolling bodies, the acting force of part of the rolling bodies in the slope is Nmax, the acting force of the input shaft on the clutch hub and the acting force of the inner plate on the rolling bodies in the rotating direction of the inner plate is Tt and is maximum Tmax, under the condition of not considering gravity and friction force, N0> Tmax, when Nt < Tt, the clutch is in a separated state, when Nt =0, the clutch is in a completely separated state, when Nt > Tt, the clutch is in a combined state, when the inner plate rotates relative to the first outer plate and the second outer plate and Nt = Tt, the clutch is kept in a separated state, when the inner plate is not rotated relative to the first and second outer plates and Nt = Tt, the clutch remains engaged.

The working method of the clutch comprises the following steps:

(1) in an initial state, the piston cavity is not pressurized, the push disc presses the piston to the leftmost position under the action of the return spring, the clutch drum is not acted by an acting force from the push disc, the elastic body pushes the rolling body through the first outer plate rightwards, the rolling body is extruded by the clutch drum, the snap spring and the second outer plate leftwards in sequence, the rolling bodies on the first outer plate and the second outer plate cannot rotate relative to the inner plate under the blocking of a ramp, the clutch is in a combined state, N0 is greater than Tt, and at the moment, if the input shaft has power input, the power is transmitted to the output shaft through the clutch hub, the inner plate, the rolling body, the first outer plate, the second outer plate and the clutch drum in sequence;

(2) when the pressure in the piston cavity is gradually increased, the pressure pushes the piston to move right, so that the clutch drum is pushed by the push disc to move right, after the first outer plate is abutted against the baffle, the first outer plate cannot move right continuously, then the piston pushes the clutch drum through the push disc to compress the elastomer, the clutch drum drives the clamp spring to move right continuously to a designed limit position, the input shaft drives the inner plate to rotate, the left ramp and the right ramp extrude rolling bodies on the left side and the right side, the second outer plate moves right to the clamp spring to be blocked, and the inner plate moves right to have a certain gap with the first outer plate and the second outer plate, so that the rolling bodies are not extruded; in the process, when Nt is not equal to 0, the clutch is in a sliding state, the inner plate can rotate relative to the first outer plate and the second outer plate with small displacement, when Nt =0, the clutch is in a completely separated state, the inner plate can rotate relative to the first outer plate and the second outer plate without being constrained, and the input shaft cannot transmit power through the clutch;

(3) when the pressure in the piston cavity is gradually reduced, the clutch drum reversely pushes the push disc to move left under the action of the elastic body, so that the push disc pushes the piston or moves left along with the piston until the clutch is completely combined, the push disc pushes the piston to the leftmost position under the action of the return spring, in the process, along with the gradual reduction of the pressure of the push disc on the clutch drum, Nt is gradually increased, when Nt is less than or equal to Tt, the clutch is in a slipping state, the inner plate can rotate relatively to the first outer plate and the second outer plate in a smaller displacement mode, when Tt is less than Nt, the clutch is in a combined state, the inner plate cannot rotate relatively to the first outer plate and the second outer plate, and the input shaft sequentially transmits power to the output shaft through the clutch hub, the inner plate, the rolling body, the first outer plate, the second outer plate and the clutch drum; because the ramp is symmetrical and continuous, and one of any two adjacent rolling bodies is at the crest, and the other is at the valley, when the rolling bodies go down the slope in the process of combining or separating the clutch, the other rolling body must go up the slope, so that half of the rolling bodies in the process of combining and separating the clutch push the first outer plate and the second outer plate to rotate in the same direction or are pushed by the first outer plate and the second outer plate to rotate in the same direction, the gear shifting process is smooth, the impact or the pause and pause are reduced, and the gear shifting can be normally and smoothly carried out when the input shaft rotates in the reverse direction.

Compared with the prior art, the invention has the following beneficial effects:

1. the friction pair is not arranged, the cost of the clutch assembly is greatly reduced, and the friction pair burning phenomenon can not occur without the friction pair.

2. The friction is not completely utilized to transmit power, the rolling friction coefficient of the rolling body is far lower than the friction coefficient of the friction pair, the sliding friction energy loss in the gear shifting process is small, the clutch is used in a wet environment, and the belt-driven torque is small when the clutch is separated, so that the energy loss of the clutch provided by the invention is small, and the efficiency is high.

3. The friction pair is not used for sliding friction, the clutch can not bring a large amount of abrasive dust to the transmission or related mechanical equipment, the heat productivity is reduced, the working environment of the clutch, the transmission or the related mechanical equipment is favorably optimized, the faults can be reduced, and the service life is prolonged.

4. The interlocking gear shifting mechanism has the advantages that the interlocking gear shifting mechanism is particularly obvious in the field of new energy automobile transmission interlocking gear shifting mechanisms, the assembly volume and the cost can be further reduced, and the efficiency is improved.

5. Because the rolling elements on the first outer plate and the second outer plate are bilaterally symmetrical on the two sides of the inner plate, and the ramps are symmetrical and continuous, the stress points of the inner plate are balanced leftwards and rightwards, the thickness of the inner plate can be smaller, the rotational inertia of the inner plate is reduced, and the application range is wider.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a schematic configuration diagram of an embodiment of the present invention.

Fig. 2 is a schematic configuration diagram of the outer panel.

Fig. 3 is a schematic configuration diagram of the inner panel.

FIG. 4 is a schematic cross-sectional view of the ramp in expanded form.

Fig. 5 is a diagrammatic perspective view of the ramp.

Detailed Description

The invention is further explained below with reference to the drawings and the embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

As shown in fig. 1 to 5, the present embodiment provides a clutch, including a clutch body 1, an inner plate 5 which rotates synchronously with an input shaft 4 is arranged between a first outer plate 2 and a second outer plate 3 of the clutch body, an annular roller path 6 is symmetrically arranged on the left and right end surfaces of the inner plate, a plurality of end-to-end ramps 7 are uniformly distributed on the annular roller path along the circumference, and the ramps on two sides are bilaterally symmetrical and are in rolling fit with a plurality of rolling elements 8 which are embedded on the outer plate on the same side along the circumference.

In the embodiment of the invention, a plurality of rolling element groove groups are uniformly distributed on the end surfaces of the first outer plate and the second outer plate close to the inner plate along the circumference, each rolling element groove group comprises at least one rolling element groove 9, and a rolling element is embedded in each rolling element groove; the rolling bodies of the first outer plate and the second outer plate correspond to the rolling body grooves one to one, and the rolling bodies are bilaterally symmetrical by taking the inner plate as a center line.

In the embodiment of the invention, the shape and the size of the rolling body and the rolling body groove are matched, the rolling body can rotate around the axis of the rolling body in the rolling body groove, the rolling body is a sphere, a cylinder or a cone, and correspondingly, the rolling body groove is an arc groove, a cylinder groove or a cone groove. The rolling body is preferably a sphere, and the rolling body groove is an arc groove.

In the embodiment of the invention, each ramp is bilaterally symmetrical about a plane passing through the inner plate axis L2 and radially passing through two hill peak straight lines L1.

In the embodiment of the invention, the shape of the ramp is adapted to the shape of the rolling body; no matter which direction the input shaft rotates, if one of any two adjacent rolling bodies is on an upward slope on a symmetrical slope, the other is on a downward slope on the other side, the number of the slopes is equal to or not equal to the number of the rolling bodies, the number of the rolling bodies is n1, n1 is an even number, the number of the slopes is n2, n2=1/2 × n1 × n, and n is an integer, so that the inner plate, the first outer plate and the second outer plate of the clutch are stressed evenly and have small fluctuation.

In the embodiment of the invention, the first outer plate and the second outer plate are respectively connected with the clutch drum 10 in a sliding mode through outer splines, the right side of the second outer plate is provided with a clamp spring 11 used for limiting the maximum distance of the right movement of the second outer plate relative to the clutch drum, the inner side of the inner plate is provided with a clutch hub 12, and the inner plate of the clutch is connected with the clutch hub in a sliding mode through the inner splines or is directly and fixedly connected with the clutch hub.

In the embodiment of the invention, an elastic body 13 is arranged on the left side of the first outer plate, two ends of the elastic body are respectively abutted against the first outer plate of the clutch and the clutch drum, the elastic body is a helical compression spring or a wave spring or a belleville spring or a rubber block or other objects with certain elasticity, and the helical compression spring is preferred; in the initial state, the first outer plate and the second outer plate press all or part of the rolling bodies under the action of the elastic force of the elastic body, and the inner plate is limited to rotate relative to the first outer plate and the second outer plate under the action of the slope; a baffle plate 14 is arranged at the lower right side of the first outer plate and is fixedly connected with a shell 15, and the baffle plate limits the maximum distance of the right movement of the first outer plate; a push disc 16 is arranged on the left side of the clutch drum and is in sliding connection with the shell through an outer spline; the left side of the push disc is provided with an actuating device which is a hydraulic device, an air pressure device, an electromagnetic device, a motor device, a cam device or other mechanical devices capable of providing shifting power for the clutch, preferably the air pressure device; the clutch hub is fixedly connected with the input shaft or is in sliding connection through a spline, the clutch drum is fixedly connected with the output shaft or is in sliding connection through a spline, and when the clutch is combined, the power of the input shaft is transmitted to the output shaft through the clutch hub, the inner plate, the rolling body, the first outer plate, the second outer plate and the clutch drum in sequence; when the clutch is separated, the inner plate rotates relative to the first outer plate and the second outer plate, and the clutch does not transmit power.

In the embodiment of the invention, the depth of the rolling body groove on the first outer plate and the second outer plate is not more than the maximum diameter of the rolling body, and the height from the slope valley to the slope peak of all the slopes is not more than the maximum diameter of the rolling body, so that the processing is convenient, and the friction between the inner plate and the first outer plate or the second outer plate is avoided; the right shift distance of the second outer plate is less than the depth of the rolling body groove so as to prevent the rolling body from sliding out of the rolling body groove.

In the embodiment of the invention, after the clutch is installed, all rolling bodies are positioned in the middle of a ramp slope, the initial acting force of the elastic body and the push plate on the rolling bodies in the rotating direction of the inner plate through the first outer plate and the second outer plate is N0, the acting force of the elastic body and the push plate on the rolling bodies in the rotating direction of the inner plate through the first outer plate and the second outer plate is variable during the ramp rolling process of the rolling bodies, the acting force of part of the rolling bodies in the ramp peak is Nmax, the acting force of the input shaft on the rolling bodies in the rotating direction of the inner plate through the clutch hub and the inner plate is Tt which is the maximum Tmax, under the condition of not considering gravity and friction force, N0 is Tmax, when Nt < Tt, the clutch is in a separated state, when Nt =0, the clutch is in a completely separated state, when Nt > Tt, the clutch is in a combined state, when the inner plate rotates relative to the first outer plate and the second outer plate, and Nt = Tt, the clutch is kept in a separated state, when the inner plate is not rotated relative to the first and second outer plates and Nt = Tt, the clutch remains engaged.

In another embodiment of the invention, the inner surface of the annular raceway of the inner plate is covered with a wear-resistant layer with certain elasticity, the wear-resistant material is elastically deformed under the extrusion of the rolling body, the deformation is increased along with the increase of the pressure, so that the friction force between the rolling body and the ramp is increased along with the increase of the friction force, the blocking force of the ramp of the inner plate on the rolling body is increased, the requirement on the elasticity of the elastic body is reduced, the requirement on the thrust of an actuator is also reduced, the cost is reduced, and the volume is reduced.

The working method of the clutch comprises the following steps:

(1) in an initial state, the piston cavity is not pressurized, the push disc presses the piston 18 to the leftmost position under the action of the return spring 17, the clutch drum is not acted by an acting force from the push disc, the elastic body passes through the first outer plate to push the rolling body rightwards, the elastic body sequentially passes through the clutch drum, the clamp spring and the second outer plate to squeeze the rolling body leftwards, the rolling bodies on the first outer plate and the second outer plate cannot rotate relative to the inner plate under the blocking of a ramp, the clutch is in a combined state, N0 is greater than Tt, and at the moment, if the input shaft has power input, the power is transmitted to the output shaft 19 sequentially through the clutch hub, the inner plate, the rolling body, the first outer plate, the second outer plate and the clutch drum;

(2) when the pressure in the piston cavity is gradually increased, the pressure pushes the piston to move right, so that the clutch drum is pushed by the push disc to move right, after the first outer plate is abutted against the baffle, the first outer plate cannot move right continuously, then the piston pushes the clutch drum through the push disc to compress the elastomer, the clutch drum drives the clamp spring to move right continuously to a designed limit position, the input shaft drives the inner plate to rotate, the left ramp and the right ramp extrude rolling bodies on the left side and the right side, the second outer plate moves right to the clamp spring to be blocked, and the inner plate moves right to have a certain gap with the first outer plate and the second outer plate, so that the rolling bodies are not extruded; in the process, when Nt is not equal to 0, the clutch is in a sliding state, the inner plate can rotate relative to the first outer plate and the second outer plate with small displacement, when Nt =0, the clutch is in a completely separated state, the inner plate can rotate relative to the first outer plate and the second outer plate without being constrained, and the input shaft cannot transmit power through the clutch;

(3) when the pressure in the piston cavity is gradually reduced, the clutch drum reversely pushes the push disc to move left under the action of the elastic body, so that the push disc pushes the piston or moves left along with the piston until the clutch is completely combined, the push disc pushes the piston to the leftmost position under the action of the return spring, in the process, along with the gradual reduction of the pressure of the push disc on the clutch drum, Nt is gradually increased, when Nt is less than or equal to Tt, the clutch is in a slipping state, the inner plate can rotate relatively to the first outer plate and the second outer plate in a smaller displacement mode, when Tt is less than Nt, the clutch is in a combined state, the inner plate cannot rotate relatively to the first outer plate and the second outer plate, and the input shaft sequentially transmits power to the output shaft through the clutch hub, the inner plate, the rolling body, the first outer plate, the second outer plate and the clutch drum; because the ramp is symmetrical and continuous, and one of any two adjacent rolling bodies is at the crest, and the other is at the valley, when the rolling bodies go down the slope in the process of combining or separating the clutch, the other rolling body must go up the slope, so that half of the rolling bodies in the process of combining and separating the clutch push the first outer plate and the second outer plate to rotate in the same direction or are pushed by the first outer plate and the second outer plate to rotate in the same direction, the gear shifting process is smooth, the impact or the pause and pause are reduced, and the gear shifting can be normally and smoothly carried out when the input shaft rotates in the reverse direction.

The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.