CN113374802A

CN113374802A - Separation spring connecting structure, transmission using same and assembling method

Info

Publication number: CN113374802A
Application number: CN202110708853.0A
Authority: CN
Inventors: 马长智; 张广瀚; 伊宝民; 刘赛赛; 李伦
Original assignee: Shengrui Transmission Co Ltd
Current assignee: Shengrui Transmission Co Ltd
Priority date: 2021-06-25
Filing date: 2021-06-25
Publication date: 2021-09-10
Anticipated expiration: 2041-06-25
Also published as: CN113374802B

Abstract

The invention relates to a separated spring connecting structure, a transmission with the separated spring connecting structure and an assembly method of the transmission, wherein the separated spring connecting structure comprises a spring group, a piston and a balance piston, the spring group comprises a first connecting plate, a second connecting plate and a plurality of springs, the springs are positioned between the first connecting plate and the second connecting plate, the first connecting plate is abutted against the balance piston under the action of the springs, and the second connecting plate is abutted against the piston; a first limiting structure is arranged between the first connecting plate and the balance piston and comprises a plurality of positioning pins, pin holes are formed in the balance piston, one ends of the positioning pins are fixed in the pin holes, and the other ends of the positioning pins penetrate through holes in the first connecting plate and extend inwards to the springs. Utilize first limit structure to fix a position the relative position between balanced piston and the spring assembly, with the length setting of locating pin as big as possible under the prerequisite that satisfies the compression stroke of spring to reach best spring location effect, avoided spacing protruding structural defects among the prior art.

Description

Separation spring connecting structure, transmission using same and assembling method

Technical Field

The invention relates to the technical field of transmissions, in particular to a separating spring connecting structure, a transmission with the separating spring connecting structure and an assembly method of the transmission.

Background

Clutches are shifting elements in automatic transmissions. In both the AT transmission and the CVT transmission, the internal clutches are engaged or disengaged under the control of oil pressure. When the clutch is combined, the separation spring is compressed, the friction plates on the driving part and the driven part are attached, and power is transmitted; when the clutch is separated, the separating spring is compressed and extended to drive the friction plates on the driving part and the driven part to separate, and the power is interrupted. In AT automatic transmissions in particular, the formation of either a forward or reverse gear must be accomplished by the cooperation of multiple clutches. The structure of the release spring directly affects the performance of the transmission.

The separating spring is usually composed of an upper circular steel sheet and a lower circular steel sheet and a certain number of springs. In the existing assembly structure, a spring is positioned between two circular steel sheets, and the two circular steel sheets are tightly attached to a piston and a balance piston under the action of the spring; in the use process, the two circular steel sheets are easy to rotate relatively, so that the spring is twisted. Wherein, a bulge is arranged on the side surface of the circular steel sheet facing the spring and used for positioning the end part of the spring; in order to reduce the processing cost, the bulge and the circular steel sheet are cast and integrally formed, and the forming mode causes insufficient processing precision and low positioning precision of the bulge; meanwhile, due to the limitation of the casting process, the height of the protruding structure is not too high, so that the limiting effect of the protruding structure on the spring is not good, the control precision of the clutch is influenced, and the overall gear shifting performance of the transmission is further influenced.

Disclosure of Invention

The invention aims to solve the technical problems that in the prior art, the spring positioning precision is not enough, the positioning effect is not good, the clutch control precision is not high, and the gear shifting performance of a transmission is not ideal.

In order to solve the technical problems, the technical scheme of the invention is as follows: the separating spring connecting structure comprises a spring group, a piston and a balance piston, wherein the spring group comprises a first connecting plate, a second connecting plate and a plurality of springs; a first limiting structure is arranged between the first connecting plate and the balance piston and comprises a plurality of positioning pins, pin holes are formed in the balance piston, one ends of the positioning pins are fixed in the pin holes, and the other ends of the positioning pins penetrate through holes in the first connecting plate and extend inwards to the springs.

As a preferred technical scheme, a plurality of first limiting bulges are arranged on the first connecting plate, a plurality of second limiting bulges are arranged on the second connecting plate, the first limiting bulges, the second limiting bulges and the springs are in one-to-one correspondence, one end of each spring is sleeved outside the first limiting bulge, and the other end of each spring is sleeved outside the second limiting bulge; the through hole is positioned on the first limiting bulge.

As a preferred technical solution, the balance piston includes a first ring body, and the pin hole is located on the first ring body;

the outer side of the first ring body is connected with a third ring body which is used for forming sealing with the inner wall of the piston cavity; the third ring body is positioned on one side of the first ring body facing the spring group;

the inner side of the first ring body is connected with a second ring body for supporting and guiding the balance piston; the second ring body and the third ring body are respectively positioned at two opposite sides of the first ring body.

According to a preferable technical scheme, the piston comprises a piston body, the piston body is annular, one end of the piston body is outwards turned to form an annular spring set clamping groove, and the second connecting plate is located in the spring set clamping groove; the outer side of the eversion part of the piston body is sleeved with a piston sealing ring which moves synchronously with the piston

As a preferred technical scheme, a second limiting structure is arranged between the second connecting plate and the spring set clamping groove.

As a preferable technical scheme, the second limiting structure comprises a blocking piece, and the blocking piece is positioned between two adjacent second limiting bulges; one end of the baffle sheet is fixed on the side surface of the second connecting plate facing the spring, and the other end of the baffle sheet extends towards the spring side in an inclined mode and extends out of the outer edge of the second connecting plate.

Preferably, the outer edge of the second connecting plate is provided with a plurality of separating grooves, one end of the baffle is fixed at the groove bottom of the separating grooves, and the other end of the baffle extends towards the spring side in an inclined manner and protrudes out of the side face of the second connecting plate facing the spring.

The transmission comprises a clutch, and the clutch comprises the separation spring connecting structure.

The assembling method of the split spring connecting structure comprises the following steps:

the method comprises the following steps: assembling a positioning pin and a balance piston;

step two: prepressing the piston;

the piston is pressed into the piston cavity to reach a set stroke, after the piston is pre-pressed in place, when the spring group is placed in the spring group clamping groove, the first connecting plate in a non-pressure state is positioned outside the piston cavity;

step three: installing a spring set;

taking a spring set, and then placing the spring set into a spring set clamping groove of the piston;

step four: placing the assembled balance piston and positioning pin assembly on the spring group, and then adjusting the position of the assembly to enable the positioning pin to penetrate through the first connecting plate and to be inserted into the spring;

step five: controlling the clamp spring guide sleeve tool to move to the outer side of the upper end of the piston cavity;

step six: placing the clamp spring into a clamp spring guide sleeve tool, and controlling the first pressure head and the second pressure head to move downwards into the clamp spring guide sleeve tool so that the first pressure head abuts against the upper side face of the clamp spring;

step seven: the first pressure head and the second pressure head are controlled to stably descend to drive the clamp spring to descend together until the first pressure head abuts against the first connecting plate and the second pressure head presses on the piston;

step eight: controlling the first pressure head and the second pressure head to continuously move downwards to drive the clamp springs to move downwards together until the piston is pressed in place;

step nine: the second pressure head is controlled to be still, the first pressure head drives the clamp spring to continue to descend until the clamp spring enters a clamp spring groove of the piston cavity;

step ten: the clamp spring guide sleeve tool is fixed, and the first pressure head and the second pressure head move upwards to reset; and then controlling the clamp spring guide sleeve tool to reset, and finishing the assembly.

Due to the adoption of the technical scheme, the connection relation among the spring group, the piston and the balance piston is improved by the separated spring connection structure, the relative position between the balance piston and the spring group is positioned by the first limiting structure, most importantly, the positioning of the spring is realized, the length of the positioning pin can be set as large as possible on the premise of meeting the compression stroke of the spring according to actual needs, the optimal spring positioning effect is achieved, and the defect of a limiting convex structure in the prior art is avoided. Meanwhile, the arrangement of the second limiting structure limits the relative position between the piston and the spring set. The combination of the first limiting structure and the second limiting structure ensures the position accuracy among the spring set, the piston and the balance piston, effectively improves the control accuracy of the clutch and improves the gear shifting performance of the transmission.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

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

FIG. 2 is an enlarged partial view of region D of FIG. 1;

FIG. 3 is a schematic view of the piston structure in the embodiment of the present invention;

FIG. 4 is a schematic structural view of a balance piston in an embodiment of the present invention;

FIG. 5 is a schematic structural view of a locating pin in an embodiment of the present invention;

FIG. 6 is a schematic diagram of the spring assembly of an embodiment of the present invention;

FIG. 7 is a sectional view taken along line A-A of FIG. 6;

FIG. 8 is an enlarged view of area B of FIG. 7;

FIG. 9 is a bottom view of FIG. 7;

FIG. 10 is an enlarged partial view of area C of FIG. 9;

FIG. 11 is an assembly view of step two of the assembly process;

FIG. 12 is an assembly view of step three of the assembly process;

FIG. 13 is an assembly view of step four of the assembly process;

FIG. 14 is an assembly view of step five of the assembly process;

FIG. 15 is an assembly schematic at step six of the assembly process;

FIG. 16 is an assembly view of step seven of the assembly process;

FIG. 17 is an assembly view of step eight of the assembly process;

FIG. 18 is an assembly diagram of step nine of the assembly process.

Detailed Description

The separated spring connecting structure comprises a spring group 4, a piston 2 and a balance piston 5; the spring pack 4 is located between the piston 2 and the balance piston 5. As shown in fig. 1 and 2, the spring assembly 4, the piston 2 and the balance piston 5 are all disposed in the housing 1, and in particular, the housing 1 is used for supporting the internal structure and elements thereof, which is the prior art and will not be described herein; an annular piston cavity 11 is formed in the housing 1, and the spring group 4, the piston 2 and the balance piston 5 are all arranged in the piston cavity 11.

As shown in fig. 2, 6, 7, 8 and 9, the spring group 4 includes a first connecting plate 41, a second connecting plate 43 and a plurality of springs 42; the first connecting plate 41 and the second connecting plate 43 are annular plates, the springs 42 are located between the first connecting plate 41 and the second connecting plate 43, and the springs 42 are uniformly distributed in an annular shape.

Be equipped with a plurality of first spacing archs 44 on the first connecting plate 41, be equipped with a plurality of second spacing archs 45 on the second connecting plate 43, first spacing arch 44, the spacing arch 45 of second and spring 42 one-to-one, the pot head of spring 42 is in the first spacing arch 44 outside, and the pot head of the other end is in the outside of the spacing arch 45 of second.

Preferably, the first limiting protrusion 44 is integrally formed with the first connecting plate 41, the second connecting plate 43 is integrally formed with the second limiting protrusion 45, and a through hole 48 is formed inside the first limiting protrusion 44 and the second limiting protrusion 45.

As shown in fig. 2 and 4, the first connecting plate 41 and the balance piston 5 have a first limit structure including the positioning pin 9, and the positioning pin 9 includes a connecting portion 91 and a limit portion 92 integrally connected to each other. The balance piston 5 is annular and comprises a first ring body 52, a plurality of pin holes 55 are formed in the first ring body 52, and the pin holes 55 are evenly distributed along the circumferential direction of the first ring body 52. Each pin hole 55 corresponds to one first limiting protrusion 44, the connecting portion 91 is matched with the pin hole 55 to realize fixed connection, and the limiting portion 92 passes through the through hole 48 of the first limiting protrusion 44 and extends towards the inner side of the spring 42. The length of the limiting portion 92 extending into the spring 42 can be as large as possible according to the compression deformation amount of the spring 42, and the spring 42 can be positioned better.

Preferably, the cross sections of the connecting portion 91 and the limiting portion 92 are circular; wherein, the connecting part 91 is in interference fit and fixed connection with the pin hole 55; the stopper 91 is clearance-fitted to the through hole 48 in the first stopper projection 44.

As shown in fig. 4, the first ring 52 has a second ring 51 connected to the inner side thereof and a third ring 53 connected to the outer side thereof, the second ring 51 and the third ring 53 are respectively located at two opposite sides of the first ring 52, and the third ring 53 is located at one side of the first ring 52 facing the spring assembly 4. The third ring 53 is blocked outside the first connecting plate 41 and the spring 42, and can limit the spring assembly 4. The second ring 51 is engaged with the piston body 21 for supporting and guiding. A first sealing groove 54 is formed in the outer wall of the third ring body 53, and a first sealing ring 7 is arranged in the sealing groove 54 and used for forming movable sealing with the inner wall of the piston cavity 11.

Still include jump ring 3, be equipped with the jump ring groove on the inner wall of piston chamber 11, jump ring 3 blocks in the jump ring groove, and keeps off on the stepped surface that third ring body 53 and first ring body 52 formed, and is spacing to balanced piston 5.

The balance piston 5 of this structure is more reasonable, not only can realize with spring assembly 4 be connected, to spring 42 location, can also reduce piston 2, spring assembly 4 and balance piston 5's overall size, the demand of the interior compact structure of adaptation clutch.

As shown in fig. 2 and 3, the piston 2 includes a piston body 21, the piston body 21 is annular, one end of the piston body is turned outwards to form an annular spring assembly slot 22, and the second connecting plate 43 is located in the spring assembly slot 22. A second limiting structure is arranged between the second connecting plate 43 and the spring group clamping groove 22, and as shown in fig. 2, 8, 9 and 10, the second limiting structure comprises a blocking piece 47, and the blocking piece is positioned between two adjacent second limiting bulges; the blocking piece 47 has one end fixed to the side of the second connecting plate 43 facing the spring 42 and the other end extending obliquely to the spring 42 and extending out of the outer edge of the second connecting plate 43.

The clearance between the outer edge of the second connecting plate 43 and the spring group clamping groove 22 is smaller than the clearance between the baffle plate 47 and the spring group clamping groove 22; the blocking piece 47 is located between two adjacent springs 42, and when the springs 42 are distorted and deformed, acting force is applied to the blocking piece 47 to press the blocking piece 47 downwards, so that the length of the blocking piece 47 extending out of the second connecting plate 43 is increased, the blocking piece 47 is contacted with the inner wall of the spring group clamping groove 22, the rotation amount of the second connecting plate 43 relative to the piston 2 is limited, and the distortion deformation amount of the springs 42 is limited.

Preferably, the outer edge of the second connecting plate 43 is provided with a plurality of separating grooves 46, and the separating grooves 46 are located between two adjacent second limiting protrusions 45; the stopper 47 has one end fixed to the bottom of the separation groove 46 and the other end extending obliquely toward the spring 42. The catch 47 extends beyond the outer edge of the second web 43 and beyond the side of the second web 43 facing the spring 42.

The outer side of the eversion part of the piston body 21 is sleeved with a piston sealing ring 6 which moves synchronously with the piston 2; a fixed sealing ring 12 in a sealing groove of the piston cavity 11 is matched with the piston body 21; piston seal 6 and stationary seal 12 form a sliding seal between piston 2 and piston chamber 11.

The assembling process of the clutch release spring connecting structure comprises the following steps:

the method comprises the following steps: assembling the positioning pin 9 and the balance piston 5;

at a preassembly station, press-fitting the positioning pin 9 into the pin hole 55 of the balance piston 5;

after the press mounting of one positioning pin 9 is completed, the pressure head rotates, and the press mounting of the remaining 4 positioning pins 9 is sequentially completed.

Step two: prepressing the piston 2;

as shown in fig. 11, after the piston 2 is pressed into the piston cavity 11 to reach the set stroke, and the piston 2 is pre-pressed to the right position, when the spring assembly 4 is placed in the spring assembly slot 22 in step three, the first connecting plate 41 in the non-pressure state is located outside the piston cavity 11, so as to observe the position of the through hole 48 on the first connecting plate 41.

Step three: installing a spring set 4;

as shown in fig. 12, the spring assembly 4 is automatically grasped by the robot arm, and the spring assembly 4 is placed in the spring assembly catching groove 22 of the piston 2.

Step four: the assembled balance piston 5 and positioning pin 9 assembly is placed on the spring group 4, and the position of the balance piston 5 and positioning pin 9 assembly is adjusted so that the positioning pin 9 is inserted into the through hole 48 of the first connecting plate 41 and the spring 42, as shown in fig. 13.

Step five: controlling the clamp spring guide sleeve tool 12 to move to the outer side of the upper end of the piston cavity 11;

specifically, as shown in fig. 14, the lower end surface of the clamp spring guide sleeve tool 14 is a stepped positioning surface, and is positioned in cooperation with the outer side surface and the end surface of the housing 1.

Step six: placing the clamp spring 3 into a clamp spring guide sleeve tool 12, and controlling a first pressure head 13 and a second pressure head 14 to move downwards to enter the clamp spring guide sleeve tool 12, so that the first pressure head 13 abuts against the upper side surface of the clamp spring 3;

specifically, as shown in fig. 15, the first pressing head 13 and the second pressing head 14 are both annular, and the second pressing head 14 is located inside the first pressing head 13; the outer circumferential surface of the first pressure head 13 is stepped, the lower end surface is used for press-fitting the spring group 4, and the annular surface on the upper side is matched with the snap spring 3 and used for press-fitting the snap spring 3. After the first pressing head 13 and the second pressing head 14 descend into the clamp spring guide sleeve tool 12, the clamp spring 3 is attached to the lower side of the first pressing head 13.

Step seven: and controlling the first pressing head 13 and the second pressing head 14 to stably descend to drive the clamp spring 3 to descend together until the first pressing head 13 abuts against the first connecting plate 41 and the second pressing head 14 presses the piston 2, as shown in fig. 16.

Step eight: and controlling the first pressing head 13 and the second pressing head 14 to continuously move downwards to drive the clamp spring 3 to move downwards together until the piston 2 is pressed to the bottom of the piston cavity 11, as shown in fig. 17, at this time, the piston 2 is positioned at the innermost side of the piston cavity 11.

Step nine: the second pressure head 14 is controlled to be stationary, and the first pressure head 13 drives the clamp spring 3 to continue to descend until the clamp spring 3 enters the clamp spring groove of the piston cavity 11, as shown in fig. 18;

step ten: keeping the clamp spring guide sleeve tool 12 still, and enabling the first pressure head 13 and the second pressure head 14 to move upwards and reset;

and then controlling the clamp spring guide sleeve tool 14 to reset, and finishing the assembly.

And the transmission comprises a clutch, and the clutch applies the separation spring connecting structure. By applying the separation spring connecting structure, the controllability of the clutch is improved, and the control precision is high. By adopting the clutch with the separation spring connecting structure, the gear shifting performance of the transmission is improved, and the controllability is good.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The separating spring connecting structure comprises a spring set (4), a piston (2) and a balance piston (5), wherein the spring set (4) comprises a first connecting plate (41), a second connecting plate (43) and a plurality of springs (42), the springs (42) are located between the first connecting plate (41) and the second connecting plate (43), the first connecting plate (41) abuts against the balance piston (5) under the action of the springs (42), and the second connecting plate (43) abuts against the piston (2); the method is characterized in that: first limit structure has between first connecting plate (41) and balanced piston (5), first limit structure includes a plurality of locating pins (9), is equipped with pinhole (55) on balanced piston (5), the one end of locating pin (9) is fixed in pinhole (55), and the other end passes through-hole (48) on first connecting plate (41) and extends to spring (42) in.

2. The split spring attachment structure of claim 1, wherein: a plurality of first limiting bulges (44) are arranged on the first connecting plate (41), a plurality of second limiting bulges (45) are arranged on the second connecting plate (43), the first limiting bulges (44), the second limiting bulges (45) and the springs (42) are in one-to-one correspondence, one end of each spring (42) is sleeved outside the corresponding first limiting bulge (44), and the other end of each spring is sleeved outside the corresponding second limiting bulge (45); the through hole (48) is positioned on the first limiting bulge (44).

3. The split spring attachment structure of claim 1, wherein: the balance piston (5) comprises a first ring body (52), and the pin hole (55) is positioned on the first ring body (52);

the outer side of the first ring body (52) is connected with a third ring body (53) which is used for forming a seal with the inner wall of the piston cavity (11); the third ring body (53) is positioned on one side of the first ring body (52) facing the spring group (4);

the inner side of the first ring body (52) is connected with a second ring body (51) for supporting and guiding the balance piston (5); the second ring body (51) and the third ring body (53) are respectively positioned on two opposite sides of the first ring body (52).

4. The split spring attachment structure of claim 1, wherein: the piston (2) comprises a piston body (21), the piston body (21) is annular, one end of the piston body is outwards turned to form an annular spring set clamping groove (22), and the second connecting plate (43) is located in the spring set clamping groove (22); the outer side of the eversion part of the piston body (21) is sleeved with a piston sealing ring (6) which moves synchronously with the piston (2).

5. The split spring attachment structure of claim 4, wherein: and a second limiting structure is arranged between the second connecting plate (43) and the spring set clamping groove (22).

6. The split spring attachment structure of claim 5, wherein: the second limiting structure comprises a blocking piece (47), and the blocking piece (47) is positioned between two adjacent second limiting bulges (45); one end of the baffle plate (47) is fixed on the side surface of the second connecting plate (43) facing the spring (42), and the other end extends towards the spring (42) in an inclined way and extends out of the outer edge of the second connecting plate (43).

7. The split spring attachment structure of claim 6, wherein: the outer edge of the second connecting plate (43) is provided with a plurality of separating grooves (46), one end of the baffle plate (47) is fixed at the bottom of the separating grooves (46), and the other end of the baffle plate extends towards the spring (42) in an inclined mode and protrudes out of the side face, facing the spring (42), of the second connecting plate (43).

8. A transmission, comprising a clutch, characterized in that: the clutch includes the separation spring connection structure according to any one of claims 1 to 7.

9. A method of assembling a split spring coupling structure as claimed in any one of claims 1 to 7, wherein: the method comprises the following steps:

the method comprises the following steps: assembling a positioning pin (9) and a balance piston (5);

step two: a pre-pressing piston (2);

the piston (2) is pressed into the piston cavity (11) to reach a set stroke, after the piston (2) is pre-pressed to the proper position, when the spring group (4) is placed in the spring group clamping groove (22), the first connecting plate (41) in a non-pressure state is positioned outside the piston cavity (11);

step three: installing a spring set (4);

taking the spring group (4), and then placing the spring group (4) into the spring group clamping groove (22) of the piston (2);

step four: placing the assembled balance piston (5) and positioning pin (9) assembly on the spring set (4), and then adjusting the position of the assembly to enable the positioning pin (9) to penetrate through the first connecting plate (41) and to be inserted into the spring (42);

step five: controlling the clamp spring guide sleeve tool (12) to move to the outer side of the upper end of the piston cavity (11);

step six: placing the clamp spring (3) into a clamp spring guide sleeve tool (12), and controlling a first pressure head (13) and a second pressure head (14) to move downwards into the clamp spring guide sleeve tool (12) so that the first pressure head (13) abuts against the upper side face of the clamp spring (3);

step seven: the first pressure head (13) and the second pressure head (14) are controlled to stably move downwards to drive the clamp spring (3) to move downwards together until the first pressure head (13) abuts against the first connecting plate (41) and the second pressure head (14) presses the piston (2);

step eight: controlling the first pressure head (13) and the second pressure head (14) to continue descending to drive the clamp spring (3) to descend together until the piston (2) is pressed in place;

step nine: the second pressure head (14) is controlled to be fixed, and the first pressure head (13) drives the clamp spring (3) to continuously descend until the clamp spring (3) enters a clamp spring groove of the piston cavity (11);

step ten: the clamp spring guide sleeve tool (12) is fixed, and the first pressure head (13) and the second pressure head (14) move upwards to reset; and then controlling the clamp spring guide sleeve tool (14) to reset, and finishing the assembly.