CN106641018B

CN106641018B - Clutch master cylinder assembly

Info

Publication number: CN106641018B
Application number: CN201510714119.XA
Authority: CN
Inventors: 宫宇
Original assignee: Schaeffler Technologies AG and Co KG
Current assignee: Schaeffler Technologies AG and Co KG
Priority date: 2015-10-28
Filing date: 2015-10-28
Publication date: 2020-10-23
Anticipated expiration: 2035-10-28
Also published as: CN106641018A

Abstract

A clutch master cylinder assembly comprising: a cylinder body having an inner cavity; the connecting flange is sleeved outside the cylinder body, and the connecting flange is matched with the cylinder body through forward rotation; the anti-torsion plug-in is inserted and clamped between the connecting flange and the cylinder body to prevent the connecting flange and the cylinder body from reversely rotating to be disengaged, so that the assembling reliability is ensured.

Description

Clutch master cylinder assembly

Technical Field

The invention relates to the field of vehicles, in particular to a clutch master cylinder assembly.

Background

The clutch master cylinder assembly is an important part of a vehicle, is connected with a pedal box and is used for acquiring the stroke information of a pedal when the vehicle runs and separating a flywheel and a driven disc of a clutch under the action of a booster.

When mounted to a vehicle, a portion of the clutch master cylinder is located in the vehicle's cabin and another portion is located in the engine compartment. The driving cabin and the engine cabin are separated through a front wall plate, and the clutch master cylinder assembly is connected with the front wall plate.

The existing clutch master cylinder assembly is provided with a cylinder body and a connecting flange sleeved outside the cylinder body, and is connected with a front wall plate through the connecting flange. The outer circumferential surface of the cylinder body is provided with lugs distributed at intervals along the circumferential direction, and the inner circumferential surface of the connecting flange is provided with grooves corresponding to the lugs.

During installation, the connecting flange and the cylinder body are coaxially arranged, the lug is axially opposite to the groove, then the connecting flange is sleeved in the cylinder body and penetrates through the lug, and finally the connecting flange rotates for an angle relative to the cylinder body, so that the groove and the lug are circumferentially staggered, the connecting flange abuts against the lug, and the connecting flange is prevented from being separated from the lug.

When the connecting flange is detached, the connecting flange rotates reversely relative to the cylinder body, so that the convex block and the groove are opposite to each other along the axial direction again, and then the connecting flange is pulled out from the cylinder body.

The clutch master cylinder assembly has the disadvantage that because the connecting flange and the cylinder body can relatively freely rotate, the assembling reliability can be affected by the reverse rotation of the connecting flange and the cylinder body in the assembling state or in the using process.

Disclosure of Invention

The invention solves the problem that the connecting flange in the existing clutch main cylinder assembly can rotate reversely relative to the cylinder body to influence the reliability of assembly.

To solve the above problems, the present invention provides a clutch master cylinder assembly, including: a cylinder body having an inner cavity; the connecting flange is sleeved outside the cylinder body, and the connecting flange is matched with the cylinder body through forward rotation; the anti-torsion plug-in unit is inserted and clamped between the connecting flange and the cylinder body so as to prevent the connecting flange and the cylinder body from reversely rotating and disengaging.

Optionally, a first mounting portion is formed on an outer circumferential surface of the cylinder block, and a second mounting portion is formed on an inner circumferential surface of the connecting flange; the first installation part and the second installation part are suitable for being matched with each other along with the forward rotation, an accommodating groove penetrating through the first installation part and the second installation part is formed, and the anti-torsion insert is clamped in the accommodating groove.

Optionally, the first mounting portion includes first protrusions distributed at intervals along the circumferential direction, and first grooves located between adjacent first protrusions; the second mounting part comprises second lugs distributed at intervals along the circumferential direction and second grooves positioned between the adjacent second lugs; the first lug and the second lug are matched with each other along with the forward rotation, and at least one first groove is communicated with one second groove along the axial direction to form the accommodating groove.

Optionally, the inner cavity of the cylinder body is provided with an opening for inserting a push rod of the main cylinder at one axial end; the anti-torsion insert is provided with an annular seat and a clamping block; the fixture block is connected with the annular seat at one end facing the opening and clamped in the accommodating groove.

Optionally, an annular groove is coaxially arranged on an end surface of the connecting flange facing one end of the opening, and is used for accommodating the annular seat; the annular groove penetrates through the inner circumferential surface of the connecting flange along the radial direction, and the clamping block is connected to the inner circumferential surface of the annular seat; the annular seat is sleeved outside the first installation part.

Optionally, the torsion insert is no higher than an end face of the attachment flange at an end facing the opening.

Optionally, the number of the fixture blocks is not greater than that of the accommodating grooves, and one fixture block is correspondingly clamped in one accommodating groove; the anti-torsion insert further comprises a hook which can penetrate through the accommodating groove and is connected to one end, facing away from the opening, of the annular seat; the outer peripheral surface of the cylinder body is coaxially provided with an annular convex rib, and the annular convex rib is positioned on one side of the first convex block back to the opening; the hook is hooked on the annular convex rib.

Optionally, the hook is formed on the fixture block.

Optionally, the hook and the fixture block correspond to different accommodating grooves respectively.

Optionally, the hooks are provided with a plurality of hooks and are staggered with the clamping blocks.

Optionally, the anti-twist insert is integrally formed.

Compared with the prior art, the technical scheme of the invention has the following advantages:

an anti-torsion plug-in is arranged between the cylinder body and the connecting flange and is clamped between the cylinder body and the connecting flange to block relative rotation between the cylinder body and the connecting flange, so that the cylinder body and the connecting flange are fixed along the circumferential direction after assembly is completed, the connecting flange is prevented from reversely rotating, and the assembly reliability is ensured.

Drawings

FIG. 1 is a partial cross-sectional view of a clutch master cylinder assembly in an embodiment of the present invention showing the cross-sectional configuration of the attachment flange and the anti-torque insert;

FIG. 2 is a view showing a state in which a torsion-resistant insert is not inserted between a connecting flange and a cylinder body in the clutch master cylinder assembly according to the embodiment of the present invention;

FIG. 3 is an assembled perspective view of a clutch master cylinder assembly in an embodiment of the present invention;

FIG. 4 is a perspective view of a connecting flange of the clutch master cylinder assembly in an embodiment of the present invention;

FIG. 5 is a perspective view of a torsional insert of the clutch master cylinder assembly in an embodiment of the present invention;

FIG. 6 is a front view of the anti-torque insert of the clutch master cylinder assembly in an embodiment of the present invention;

FIG. 7 illustrates an assembled configuration between the anti-torque insert and the cylinder block;

fig. 8 shows the assembly between the anti-twist insert and the connecting flange.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

An embodiment of the present invention provides a clutch master cylinder assembly, which is shown in fig. 1 and includes a cylinder body 10, a connecting flange 20 sleeved outside the cylinder body 10, and an anti-torque plug 30 sleeved between the cylinder body 10 and the connecting flange 20. In which the cylinder block 10 is fitted into a dash panel when mounted on a vehicle, and the connection flange 20 is connected to the dash panel in the vehicle body to fix the cylinder block 10 to the dash panel.

The connecting flange 20 and the cylinder body 10 are matched through forward rotation, wherein the direction of the forward rotation is consistent with the rotation direction during assembly. The anti-twist insert 30 serves to prevent a reverse rotation between the attachment flange 20 and the cylinder block 10, which is in the opposite direction to the rotation during assembly.

With continued reference to fig. 1, and with reference to fig. 2 and 3, a first mounting portion is formed on the outer circumferential surface of the cylinder block 10, and a second mounting portion is formed on the inner circumferential surface of the connecting flange 20. The first and second mounting portions are adapted to engage with each other in response to forward rotation and form a receiving groove through the first and second mounting portions, and the anti-twist insert 30 is retained in the receiving groove. Wherein the anti-torque insert 30 should extend through at least the connection between the first and second mounting portions to resist reverse rotation between the cylinder block 10 and the connecting flange 20.

Specifically, referring to fig. 4 in combination, the first mounting portion includes first protrusions 11 spaced apart in the circumferential direction, and first grooves 11a located between adjacent first protrusions 11. The second mounting portion includes second projections 22 (fig. 4) spaced apart in the circumferential direction, and second grooves 22a between adjacent second projections 22. The first projection 11 and the second projection 22 are mutually matched along with the forward rotation, and at least one first groove 11a and one second groove 22a are opposite and communicated along the axial direction to form a receiving groove. The anti-twist insert 30 engaged in the receiving groove needs to be engaged in the corresponding first groove 11a and second groove 22a at the same time, so that the cylinder body 10 and the connecting flange 20 are prevented from rotating in the opposite direction. In other embodiments, the first protrusion 11 and the second protrusion 22 may be directly provided with grooves that are axially communicated to each other to form the receiving groove.

The number of the first bumps 11 and the second bumps 22 can be set arbitrarily, as long as: each first bump 11 corresponds to the second groove 22a one by one and can penetrate through the corresponding second groove 22 a; each second protrusion 22 corresponds to the first groove 11a one-to-one and can penetrate through the corresponding first groove 11 a.

As an example, in the present embodiment, the first protrusions 11 are four that are uniformly distributed along the circumferential direction, and four first grooves 11a are formed; correspondingly, the second protrusions 22 are also four and are evenly distributed along the circumferential direction, and four second grooves 22a are formed. Only a part of the first protrusion 11 and the first recess 11a are marked in fig. 2 and 3.

During assembly, the connecting flange 20 is sleeved into the cylinder body 10 from one end of the opening a, the second protrusion 22 is aligned with the first groove 11a, the second groove 22a is aligned with the first protrusion 11, and then the connecting flange 20 is pressed in towards the first protrusion 11 along the axial direction, so that the second protrusion 22 passes through the corresponding first groove 11 a; after the second protrusion 22 completely passes through the first groove 11a, the connecting flange 20 and the cylinder 10 are rotated by an angle, such that the first protrusion 11 is offset from the second groove 22a, and the second protrusion 22 is offset from the first groove 11 a. Finally, in an assembly state, the second projection 22 is located on one side of the first projection 11, which is opposite to the opening a, and abuts against the first projection 11 to realize mutual matching, the first groove 11a and the second groove 22a are opposite along the axial direction, and each group of the first groove 11a and the second groove 22a which are opposite along the axial direction respectively form a receiving groove for clamping the anti-torque plug-in unit.

The first bump 11 and the second bump 22 may have a slot therein, and when the first bump 11 and the second bump 22 are engaged with each other, one of the bumps may be inserted into the slot of the other bump.

When the first grooves 11a and the second grooves 22a are axially opposite to each other and form a plurality of receiving grooves, each receiving groove can be used for clamping the anti-twist insert 30. That is, the anti-twist insert 30 may be engaged in only one receiving groove, or may be engaged in different receiving grooves. In this embodiment, the anti-twist insert 30 is simultaneously captured in each of the receiving slots.

As shown in fig. 1, the cylinder body 10 has an inner cavity 10a, and the inner cavity 10a has an opening a at one end in the axial direction of the cylinder body 10 for inserting a master cylinder push rod (not shown in the drawings).

As shown in fig. 2 and 3 in combination with fig. 5 and 6, the anti-torque insert 30 has an annular seat 31 and

locking blocks

33a and 33b, wherein the

locking blocks

33a and 33b are connected to the annular seat 31 at an end facing the opening a and are locked in the receiving groove to prevent relative rotation between the connecting flange 20 and the cylinder 10. Here, the

latches

33a, 33b "latch" in the receiving grooves, meaning that both circumferential sides of the

latches

33a, 33b abut against both circumferential sides of the corresponding first groove 11a, respectively (fig. 7), and also abut against both circumferential sides of the corresponding second groove 22a, respectively (fig. 8).

In the present embodiment, the circumferential lengths of the first groove 11a and the second groove 22a are the same. When the assembly is completed, the first groove 11a and the second groove 22a are completely opposite to each other in the axial direction, that is, the first groove 11a and the second projection 22 do not overlap in the axial direction, and the second groove 22a and the first projection 11 do not overlap in the axial direction. Accordingly, the

latch blocks

33a, 33b have the same circumferential length as the first and

second grooves

11a, 22a, so as to abut against both circumferential sides of the first groove 11a and both circumferential sides of the second groove 22a, respectively, at both circumferential sides.

It can be seen that when the anti-torque insert 30 is inserted into the cylinder body 10 and the connecting flange 20, the locking blocks 33a and 33b are locked in the first groove 11a and the second groove 22a to block the relative rotation between the cylinder body 10 and the connecting flange 20, so that the cylinder body 10 and the connecting flange 20 cannot be reversely rotated after the assembly is completed, thereby preventing the connecting flange from reversely rotating and ensuring the reliability of the assembly.

Further, as shown in fig. 2 and 4, an annular groove 21 is coaxially provided on an end surface of the connecting flange 20 facing the opening a for receiving the annular seat 31. This reduces the height of the portion of the anti-torque insert 30 extending from the end of the opening a beyond the attachment flange 20, so that the axial space of the cylinder block 10 occupied by the anti-torque insert 30 overlaps the attachment flange 20 as much as possible, while reducing the occupation of the remaining axial space of the cylinder block 10, facilitating the assembly of other components on the cylinder block 10.

Specifically, the annular groove 21 radially penetrates the inner circumferential surface of the attachment flange 20, and the

latch blocks

33a, 33b are attached to the inner circumferential surface of the annular seat 31. The annular seat 31 is sleeved outside the first mounting portion, i.e., the first bump 11. That is, the diameter of the inner peripheral surface of the annular seat 31 is not smaller than the outer diameter of the cylinder 10 at the first boss 11.

In addition, it should be noted that the inner peripheral surface of the annular seat 31 may be flush with the inner peripheral surface of the connecting flange 20, or slightly higher than the inner peripheral surface of the connecting flange 20, but should not be lower than the inner peripheral surface of the connecting flange 20, otherwise the

latch

33a, 33b will interfere with the inner peripheral surface of the connecting flange 20 and cannot pass through the second groove 22 a. In this embodiment, the inner circumferential surface of the annular seat 31 may be flush with the inner circumferential surface of the connecting flange 20, so that it is ensured that the annular seat 31 can be sleeved outside the first protrusion 11, and the clamping blocks 33a and 33b can smoothly pass through the second groove 22 a.

Further, the anti-torque insert 30 is no higher than the end face of the attachment flange 20 at the end facing the opening a. That is, the annular seat 31 of the anti-torque insert 30 will be located entirely within the annular groove 21. In this way, the axial space occupied by the anti-torque insert 30 on the cylinder block 10 will completely coincide with the attachment flange 20, and no further remaining space on the cylinder block 10 will be occupied.

Accordingly, the

latch blocks

33a, 33b should be no higher than the end surface of the connecting flange 20 at the end facing the opening a to save space, for example, may be no higher than the end surface of the annular seat 31. However, it should be noted that, in use, although the connecting flange 20 and the cylinder 10 cannot rotate relatively, there is still a tendency of relative rotation, so as to form a torque to the latch blocks 33a and 33b, and therefore, on the premise of satisfying the above requirement, the axial length of the latch blocks 33a and 33b is properly increased, so as to increase the strength thereof to resist the torque, for example, the end of the latch blocks 33a and 33b facing the opening a may be flush with the end surface of the annular seat 31.

Wherein, the number of the

latch blocks

33a, 33b may be the same as or not greater than the number of the receiving grooves. In this embodiment, as shown in fig. 5, a plurality of the latch blocks 33a and 33b are uniformly arranged on the annular seat 31 along the circumferential direction, and one

latch block

33a and 33b is correspondingly locked in one accommodating groove.

With continued reference to fig. 5 in conjunction with fig. 1, the torque insert 30 further includes a hook 34 that is insertable into the receiving slot, the hook 34 being attached to an end of the annular seat 31 facing away from the opening a.

The outer circumferential surface of the cylinder 10 is coaxially provided with an annular rib 12, and the annular rib 12 is located on the side of the first projection 11 facing away from the opening a. During assembly, the hook 34 is hooked on the annular rib 12. Through the cooperation of the hooks 34 and the annular ribs 12, the anti-torsion insert 30 can be prevented from coming off in the axial direction, and the reliability of assembly is ensured.

The hooks 34 can be connected directly to the annular seat 31 or can be connected to the annular seat 31 by other connecting means. In this embodiment, the hook 34 is connected to the annular seat 31 via a latch 33 b. As shown in fig. 5, the hook 34 is formed on the latch 33b and connected to the annular seat 31 through the latch 33 b. In order to meet the assembling requirement between the hook 34 and the annular rib 12, the axial length of the clamping block 33b is smaller than that of the clamping block 33 a.

Wherein, if the setting of the hook 34 does not affect the torsion-resistant requirement of the latch 33b to the cylinder 10 and the connecting flange 20, all the

latches

33b and 33a can maintain the same length, and a hook 34 can be set on each latch.

In the embodiment, as described above, the axial length of the latch is increased, and the strength of the latch can be increased to resist the torque, so as shown in fig. 5, the hook 34 is only disposed on a part of the latch 33b, and the hooks 34 are not disposed on the other latches 33 a. The axial length of the fixture block 33a without the hook 34 is larger than that of the rest fixture blocks 33b so as to meet the torsion resistance requirement; at this time, the axial length of the latch 33b provided with the hook 34 may be appropriately reduced, but should be capable of being latched at least in the first recess 11a to secure the torsional strength of the torsion resistant insert 30.

The latch blocks 33b provided with the hooks 34 and the latch blocks 33a not provided with the hooks 34 may be arranged in a staggered manner in the circumferential direction (fig. 5), or in other manners.

In a modified embodiment of the present embodiment, the hook 34 can also be directly connected to the annular seat 31 and disposed in a different accommodating groove with the latch.

In the present embodiment, the torsion resistant insert 30 having the annular seat 31 and the locking blocks 33a and 33b is integrally formed, for example, a plastic member and integrally formed by an injection molding process, or a metal member and integrally formed.

It should be noted that the anti-torque insert 30 is not limited to the anti-torque effect achieved by the engagement in the receiving groove, but can also achieve the anti-torque effect as long as the cylinder 10 and the connecting flange 20 can be connected to each other in a rotationally fixed manner.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A clutch master cylinder assembly comprising:

a cylinder body having an inner cavity;

the connecting flange is sleeved outside the cylinder body, and the connecting flange is matched with the cylinder body through forward rotation;

the anti-torsion connecting device is characterized by further comprising an anti-torsion plug piece which is inserted and clamped between the connecting flange and the cylinder body so as to prevent the connecting flange and the cylinder body from reversely rotating and disengaging.

2. The clutch master cylinder assembly as claimed in claim 1, wherein a first mounting portion is formed on an outer circumferential surface of the cylinder body, and a second mounting portion is formed on an inner circumferential surface of the connecting flange;

the first installation part and the second installation part are suitable for being matched with each other along with the forward rotation, an accommodating groove penetrating through the first installation part and the second installation part is formed, and the anti-torsion insert is clamped in the accommodating groove.

3. The clutch master cylinder assembly of claim 2, wherein the first mounting portion includes circumferentially spaced first projections and first recesses between adjacent first projections;

the second mounting part comprises second lugs distributed at intervals along the circumferential direction and second grooves positioned between the adjacent second lugs;

the first lug and the second lug are matched with each other along with the forward rotation, and at least one first groove is communicated with one second groove along the axial direction to form the accommodating groove.

4. The clutch master cylinder assembly of claim 3, wherein the inner cavity of the cylinder body has an opening at one axial end for insertion of a master cylinder push rod;

the anti-torsion insert is provided with an annular seat and a clamping block;

the fixture block is connected with the annular seat at one end facing the opening and clamped in the accommodating groove.

5. The clutch master cylinder assembly as defined in claim 4, wherein an annular groove is coaxially provided on an end surface of said connecting flange facing said open end for receiving said annular seat;

the annular groove penetrates through the inner circumferential surface of the connecting flange along the radial direction, and the clamping block is connected to the inner circumferential surface of the annular seat;

the annular seat is sleeved outside the first installation part.

6. The clutch master cylinder assembly of claim 5, wherein the torsion insert is no higher than an end surface of the attachment flange at an end facing the opening.

7. The master cylinder assembly of claim 4, wherein the number of the locking pieces is not greater than the number of the receiving grooves, and one locking piece is correspondingly locked in one receiving groove;

the anti-torsion insert further comprises a hook which can penetrate through the accommodating groove and is connected to one end, facing away from the opening, of the annular seat;

the outer peripheral surface of the cylinder body is coaxially provided with an annular convex rib, and the annular convex rib is positioned on one side of the first convex block back to the opening;

the hook is hooked on the annular convex rib.

8. The clutch master cylinder assembly of claim 7, wherein the hook is formed on the cartridge.

9. The clutch master cylinder assembly of claim 7, wherein the hook and the latch correspond to different receiving grooves, respectively.

10. The clutch master cylinder assembly of claim 9, wherein the hook has a plurality of hooks and is staggered with respect to the latch blocks.

11. The clutch master cylinder assembly of any one of claims 4-10, wherein the torsion insert is integrally formed.