阅读说明：本技术 可拆卸的汽车用离合器主缸活塞与推杆连接机构 (Detachable connecting mechanism for automobile clutch master cylinder piston and push rod ) 是由 顾江慧 田丽红 王变变 汪永胜 陆国明 何东 凌利峰 黄国兴 姚鑫 方卫春 于 2020-12-30 设计创作，主要内容包括：本发明公开了一种可拆卸的汽车用离合器主缸活塞与推杆连接机构。包括活塞、活塞座和推杆总成,活塞座安装孔孔内壁周向设有多个圆周周向间隔布置的限位斜凸台,活塞座一端开设有圆周周向间隔布置的L形槽,L形槽主要由导向槽和锁钩槽连接构成,锁钩槽在远离导向槽一侧的槽侧面设有限位锁钩,限位锁钩先向导向槽延伸后径向向外弯折,限位锁钩径向向外弯折的端部和锁钩槽在远离导向槽一侧的槽侧面之间用于嵌装限位斜凸台。本发明机构可有效降低产品成本和设计周期的同时,还可提高生产装配效率,后期也便于产品拆解及维护。(The invention discloses a detachable connecting mechanism for a clutch master cylinder piston and a push rod of an automobile. The piston comprises a piston, piston seat and push rod assembly, piston seat mounting hole inner wall circumference is equipped with the spacing oblique boss of a plurality of circumference interval arrangements, the L shape groove of circumference interval arrangements is seted up to piston seat one end, the L shape groove mainly comprises guide way and latch hook groove connection, the latch hook groove is equipped with spacing latch hook at the groove side of keeping away from guide way one side, spacing latch hook radially outwards buckles to the guide way extension back earlier, the tip and the latch hook groove of radially outwards buckling of spacing latch hook are used for inlaying between the groove side of keeping away from guide way one side and adorn spacing oblique boss. The mechanism can effectively reduce the product cost and the design period, simultaneously can improve the production and assembly efficiency, and is convenient for product disassembly and maintenance in the later period.)

1. The utility model provides a detachable clutch master cylinder piston and push rod coupling mechanism for car, including piston (1), piston seat (2) and push rod assembly (3), piston (1) one end is equipped with piston seat mounting hole (1-1) that is used for assembling piston seat (1), piston seat (2) are packed into in piston seat mounting hole (1-1), piston seat (2) are equipped with ball socket (2-5) that are used for assembling push rod bulb (3-1) near the outer one end in piston seat mounting hole (1-1) hole, push rod bulb (3-1) ball pivot of push rod assembly (3) is installed in ball socket (2-5), its characterized in that:

a plurality of limiting inclined bosses (1-2) are circumferentially arranged on the inner wall of the piston seat mounting hole (1-1), and the limiting inclined bosses (1-2) are circumferentially arranged at intervals along the same circumference;

one end of the piston seat (2) close to the hole of the piston seat mounting hole (1-1) is provided with L-shaped grooves matched with the limit inclined bosses (1-2), the L-shaped grooves are circumferentially arranged at intervals along the same circumference, the L-shaped grooves are mainly formed by connecting guide grooves (2-1) and lock hook grooves (2-3), the guide grooves (2-1) are axially arranged, the lock hook grooves (2-3) are circumferentially arranged, the side surfaces of the lock hook grooves (2-3) at one side far away from the guide grooves (2-1) are provided with limit lock hooks (2-2), the limit lock hooks (2-2) extend to the guide grooves (2-1) and then are radially bent outwards, the end part of the limiting lock hook (2-2) which is bent outwards in the radial direction and the side surface of the lock hook groove (2-3) at one side far away from the guide groove (2-1) are used for embedding a limiting inclined boss (1-2).

2. The detachable connecting mechanism for the piston and the push rod of the clutch master cylinder for the automobile as claimed in claim 1, wherein: the side surfaces of the bosses of all the limiting inclined bosses (1-2) are arranged in an inclined way from the same circumferential turning direction.

3. The detachable connecting mechanism for the piston and the push rod of the clutch master cylinder for the automobile as claimed in claim 1, wherein: the side wall of the piston seat (2) around the ball socket (2-5) is provided with a plurality of open grooves (2-6) along the circumferential direction, and each open groove (2-6) is arranged along the axial direction.

4. The detachable connecting mechanism of the clutch master cylinder piston and the push rod for the automobile as claimed in claim 3, wherein: the plurality of open grooves (2-6) axially extend to be communicated with the lock hook grooves (2-3), so that the ejector pin can radially penetrate through the piston seat mounting hole (1-1) from the outside, then penetrate through the open grooves (2-6) and then be connected to the end part of the limiting lock hook (2-2) which is bent radially outwards.

5. The detachable connecting mechanism for the piston and the push rod of the clutch master cylinder for the automobile as claimed in claim 1, wherein: the other end of the piston (1) is provided with a cross groove (1-4) for fixing and preventing rotation when the piston (1) is assembled with a piston seat (2) with a push rod ball head.

6. The detachable connecting mechanism for the piston and the push rod of the clutch master cylinder for the automobile as claimed in claim 1, wherein: one end of the push rod (3) is provided with a ball head structure which is sleeved in a ball socket (2-5) of the piston seat (2) to form a matched hinge joint.

Technical Field

The invention relates to a clutch master cylinder for an automobile, in particular to a detachable connecting mechanism for a piston and a push rod of the clutch master cylinder for the automobile.

Background

Traditional piston and push rod coupling mechanism does not have the function of dismantling usually, needs to carry out secondary machine tooling to the piston moreover and handles, just can satisfy piston + piston seat and push rod's connection function, causes the product later stage to disassemble and maintains very difficult, and the manufacturing cost of whole product is also higher.

Disclosure of Invention

In order to solve the problems in the background art, the invention provides a detachable connecting mechanism for a piston and a push rod of a clutch master cylinder for an automobile, which is suitable for being applied to the clutch master cylinder for the automobile.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention comprises a piston, a piston seat and a push rod assembly, wherein one end of the piston is provided with a piston seat mounting hole for assembling the piston seat, the piston seat is arranged in the piston seat mounting hole, one end of the piston seat, which is close to the outside of the piston seat mounting hole, is provided with a ball socket for assembling a push rod ball head, the push rod ball head of the push rod assembly is in ball joint installation in the ball socket, the inner wall of the piston seat mounting hole is circumferentially provided with a plurality of limiting inclined bosses, and the plurality of limiting inclined bosses are circumferentially arranged at intervals along the same circumference; piston seat is being close to the downthehole one end of piston seat mounting hole seted up with spacing oblique boss complex L shape groove, a plurality of L shape grooves are along same circumference interval arrangement, the L shape groove mainly comprises guide way and latch hook groove connection, the guide way is arranged along the axial, the latch hook groove is arranged along circumference, the latch hook groove is equipped with spacing latch hook at the groove side of keeping away from guide way one side, spacing latch hook radially outwards buckles after extending to the guide way earlier, the tip and the latch hook groove of radially outwards buckling of spacing latch hook are used for inlaying the dress spacing oblique boss between the groove side of keeping away from guide way one side.

The side surfaces of the bosses of all the limiting inclined bosses are spirally and obliquely arranged towards the same circumference.

The side wall of the piston seat around the ball socket is provided with a plurality of open grooves along the circumferential direction, and each open groove is arranged along the axial direction.

The plurality of open grooves axially extend to be communicated with the latch hook grooves, so that the ejector pin can radially penetrate through the piston seat mounting hole from the outside, then penetrate through the open grooves and then be connected to the end part of the limiting latch hook, which is bent outwards in the radial direction.

The diameter of the inner wall of the mounting hole of the piston seat is the same as the outer diameter of the piston seat.

The other end of the piston is provided with a cross groove for fixing and preventing rotation when the piston seat is assembled with the push rod ball head.

One end of the push rod is provided with a ball head structure which is sleeved in a ball socket of the piston seat to form matching hinge joint.

The technical problems and benefits to be solved by the invention are as follows:

(1) the push rod and the piston have a detachable function, so that the after-sale disassembly maintenance cost of a clutch main cylinder product can be reduced;

(2) the piston is formed by injection molding, so that working procedures such as machining and the like are not required to be added, the product cost is effectively reduced, and the economic benefit is improved.

Drawings

The inventive structure is further described below in conjunction with the appended drawings and the detailed description:

fig. 1 is a block diagram of the invention after assembly of the whole.

Fig. 2 is an exploded view of the present invention.

Fig. 3 is an overall cross-sectional view of the present invention.

Fig. 3(a) is a radial cross-sectional view of the present invention.

FIG. 3(B) is a sectional view taken along line B-B of FIG. 3 (a).

Fig. 4 is a view showing the construction of the piston of the present invention.

Fig. 4(a) is a side view of the piston.

FIG. 4(b) is a cross-sectional view taken along line C-C of FIG. 4 (a).

Fig. 4(c) is an axial sectional view at the position of the limit ramp boss of fig. 4 (b).

Fig. 4(d) is an axial sectional view at the position of the limit ramp boss of fig. 4 (b).

Fig. 5 is a block diagram of the piston seat of the present invention.

Fig. 5(a) is a perspective view of the piston seat.

Fig. 5(b) is a side view of the piston seat.

FIG. 5(c) is a D-D sectional view of FIG. 5 (b).

Fig. 6 is a block diagram of the push rod assembly of the present invention.

FIG. 7 is a schematic view of the assembly process of the tappet assembly + piston seat and piston according to the present invention.

In the figure: 1. a piston; 1-1, a piston seat mounting hole; 1-2, limiting the inclined boss;

1-3, limiting the side surface of the inclined boss; 1-4, cross grooves;

2. a piston seat: 2-1, a guide groove; 2-2, limiting a lock hook; 2-3, locking hook grooves;

2-4, the side surface of the lock hook groove; 2-5, ball and socket; 2-6, open slots;

3. a push rod assembly: 3-1, a push rod ball head.

Detailed Description

The invention is further illustrated by the following figures and examples.

As shown in figures 1, 2 and 3(a), the mechanism of the invention comprises a piston 1, a piston seat 2 and a push rod assembly 3, wherein one end of the piston 1 is provided with a piston seat mounting hole 1-1 for assembling the piston seat 1, the piston seat 2 is arranged in the piston seat mounting hole 1-1, one end of the piston seat 2 close to the outside of the piston seat mounting hole 1-1 is provided with a ball socket 2-5 for assembling a push rod ball 3-1, and the push rod ball 3-1 of the push rod assembly 3 is arranged in the ball socket 2-5 in a ball hinge manner.

As shown in fig. 4(a) -4 (c), the inner wall of the hole of the piston seat mounting hole 1-1 is circumferentially provided with a plurality of limiting inclined bosses 1-2, and as shown in fig. 3(b), the boss side surfaces of all the limiting inclined bosses 1-2 are arranged in an inclined manner in a clockwise direction towards the same circumference. The plurality of limiting inclined bosses 1-2 are circumferentially arranged at intervals along the same circumference.

As shown in fig. 5(a) -5 (c), the piston base 2 is formed by injection molding, one end of the piston base 2 close to the hole 1-1 of the piston base mounting hole is provided with an L-shaped groove matched with the limit oblique boss 1-2, the number of the L-shaped grooves is consistent with that of the limit oblique boss of the piston, the L-shaped grooves are circumferentially arranged along the same circumference at intervals, the L-shaped groove is mainly formed by connecting a guide groove 2-1 and a locking hook groove 2-3, the guide groove 2-1 is axially arranged, the locking hook groove 2-3 is circumferentially arranged, the locking hook groove 2-3 is provided with a limit locking hook 2-2 on the groove side far away from the guide groove 2-1, the limit locking hook 2-2 extends towards the guide groove 2-1 and then radially bends outwards to form a locking hook structure, and the end part of the limit locking hook 2-2 which radially bends outwards and the locking hook groove 2-3 are used for embedding the limit oblique boss 1 between the groove sides far away from the guide groove 2 -2.

Firstly, a piston seat 2 is axially inserted into a piston seat mounting hole 1-1, and a limiting inclined boss 1-2 is axially embedded into a guide groove 2-1 of the piston seat; then the piston seat 2 is rotated to drive the L-shaped groove and the limiting latch hook 2-2 to rotate, the limiting inclined boss 1-2 on the inner wall of the hole of the piston seat mounting hole 1-1 is embedded into the limiting latch hook 2-2 through the guide groove 2-1 of the piston seat, at the moment, the side surface 1-3 of the limiting inclined boss is also attached to the side surface 2-4 of the latch hook groove, so that the piston seat 2 provided with the push rod ball 3-1 can be stably embedded into the piston 1, and finally the push rod and the piston can be hinged in a positioning mode.

The guide groove 2-1 can provide a guide effect for the limiting inclined boss when the piston seat is assembled or disassembled; the limiting latch hook 2-2 is used for locking the limiting oblique boss to prevent the piston and the piston seat from circumferential rotation movement, meanwhile, the inner side face 1-3 of the limiting oblique boss can be attached to the side face 2-4 of the latch hook groove to prevent the piston and the piston seat from axial movement, so that the piston seat provided with the push rod ball head can be stably embedded into the piston, and finally, the hinge joint of the push rod and the piston is realized.

The side wall of the piston seat 2 around the ball socket 2-5 is provided with a plurality of open grooves 2-6 along the circumferential direction, each open groove 2-6 is arranged along the axial direction, the open grooves 2-6 are used for deformation in the process of press fitting of the push rod ball head 3-1 to the ball socket 2-5 of the piston seat 2 so as to be convenient for assembly, and the piston seat can expand and deform when the piston seat and the push rod ball head are independently press fitted or pulled apart.

The plurality of open grooves 2-6 axially extend to be communicated with the lock hook grooves 2-3, so that the ejector pin can radially penetrate through a through hole of the piston seat mounting hole 1-1 from the outside, then penetrate through the open grooves 2-6 and then be connected to the end part of the limiting lock hook 2-2 bent radially outwards, and thus the end part of the limiting lock hook 2-2 bent radially outwards deforms inwards, and the limiting inclined boss 1-2 is separated from the limiting lock hook 2-2.

The diameter of the inner wall of the piston seat mounting hole 1-1 is basically the same as the outer diameter of the piston seat 2, so that the radial expansion deformation of the piston seat under stress can be effectively prevented.

As shown in fig. 4(d), the other end of the piston 1 is provided with a cross-shaped groove 1-4 for fixing and preventing rotation when the piston 1 is assembled with the piston seat 2 with the push rod ball head.

As shown in figure 6, one end of the push rod 3 is provided with a ball head structure which is sleeved in the ball socket 2-5 of the piston seat 2 to form a matching hinge joint.

The implementation working process of the invention is as follows:

as shown in fig. 7, a push rod ball 3-1 of a push rod assembly 3 is press-fitted into a ball socket 2-5 of a piston seat 2, the piston 1 is fixed on an assembly tool through a cross groove 1-4, a guide groove 2-1 on the piston seat 2 is aligned with a limit inclined boss 1-2 on a piston mounting hole 1-1, the piston seat 2 provided with the push rod ball 3-1 is pressed into the piston seat mounting hole 1-1, a side surface 2-4 of a lock hook groove is attached to the side surface 1-3 of the limit inclined boss, and finally the piston seat 2 is rotated to a certain angle relative to the piston 1, so that the limit inclined boss 1-2 is screwed into a limit lock hook 2-2, and at the moment, the piston seat 2 is completely embedded into the piston seat mounting hole 1-1, and the hinge joint of the piston 1 and the push rod assembly 3 is realized;

when the piston seat 2 and the push rod ball head 3-1 which are embedded into the piston seat mounting hole 1-1 need to be taken out, the piston seat 2 and the push rod ball head 2-3 can be rotationally taken out only by using a thimble tool to simultaneously penetrate through a plurality of open grooves 2-6 which are communicated with the lock hook grooves 2-3 on the piston seat 2 and push the limiting lock hook 2-2 to enable the limiting lock hook to swing towards the axis, so that the detachable function of the piston and the push rod is realized.

Therefore, the piston and the push rod assembly can be flexibly and conveniently assembled and disassembled, the disassembly and maintenance cost of a product at the later stage can be effectively reduced, the piston adopts an injection molding process, and the assembly and the fixation of the piston seat can be realized without machining, so that the development period and the cost of the product are reduced, the production efficiency and the assembly efficiency can be improved, and the product disassembly and maintenance are facilitated.