CN103527556A - Piston, air cylinder and manufacturing process of piston - Google Patents
Piston, air cylinder and manufacturing process of piston Download PDFInfo
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- CN103527556A CN103527556A CN201310511744.5A CN201310511744A CN103527556A CN 103527556 A CN103527556 A CN 103527556A CN 201310511744 A CN201310511744 A CN 201310511744A CN 103527556 A CN103527556 A CN 103527556A
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- piston
- piston rod
- locating slot
- center hole
- press machine
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Abstract
The invention discloses a piston, an air cylinder provided with the piston and a manufacturing process of the piston. The piston comprises a piston body and a piston rod, wherein a center hole is formed in the piston body, and the piston rod is sleeved with the center hole of the piston body. Two locating grooves are formed in the piston rod, the two side ends of the piston body correspond to one locating groove respectively, and the two side ends of the piston body are filled into the locating grooves after being extruded by a press machine. In the manufacturing process of the piston, the coaxiality between the piston body and the piston rod can be guaranteed only by meeting the accuracy requirements of the center hole of the piston body and the piston rod. The piston is simple in structure and convenient to manufacture, coaxiality errors caused by the bolted connection mode in the prior art are avoided, either in the manufacturing process or in the using process, the coaxiality between the piston body and the piston rod is far higher than the coaxiality between the piston body and the piston rod of a piston which is manually assembled in the prior art, and therefore the service life of the air cylinder is prolonged to a large extent.
Description
Technical field
The present invention relates to airdraulics field, particularly a kind of piston and a kind of cylinder, and a kind of manufacturing process of piston.
Background technique
At present, cylinder on the market mainly consists of component such as cylinder barrel, piston, piston rod, front and rear covers, and the coaxality of piston rod and piston only affects the working life of cylinder to a great extent.
As shown in Figure 1, the SC standard type cylinder piston of take is example, SC standard type cylinder piston of the prior art comprises piston rod 5 and piston only, piston only comprises piston main body 3, front sleeve 2 and rear sleeve 4, the assembling mode of piston rod 5 and piston only is specially: one end of piston main body 3 and front sleeve 2 drive fits, the other end and rear sleeve 4 drive fits, counterbore 21 is offered at front sleeve 2 centers, through hole 41 is offered at rear sleeve 4 centers, piston rod 5 front ends are provided with interior threaded hole 51, front sleeve 2 and rear sleeve 4 respectively with piston main body 3 drive fits after, with bolt 1 through counterbore 21 with through hole 41 is last and tapped hole 51 is connected, thereby piston only and piston rod 5 are fixed.In the cylinder obtaining by this assembling mode, the coaxality of cylinder barrel and piston is lower, and the frictional force producing in piston movement process is larger, causes energy consumption conversion ratio low, uses for a long time, even can cause cylinder leakage tester.
Therefore, how improving the coaxality of piston rod and piston only to reduce the friction of piston in movement process and between cylinder barrel, increase the working life of cylinder, is those skilled in the art's technical problems urgently to be resolved hurrily.
Summary of the invention
In view of this, the invention discloses a kind of piston and a kind of cylinder that is provided with this piston, the invention also discloses the manufacturing process of above-mentioned piston, in above-mentioned piston, coaxality between piston rod and piston only far above in prior art by the piston of hand assembled, thereby extended to a great extent working life of cylinder.
For achieving the above object, the invention provides following technological scheme:
, comprising:
Be provided with the piston only of center hole;
Be sheathed on the piston rod in the described center hole of described piston only, on described piston rod, be provided with two locating slots, two sides of described piston only are corresponding with a described locating slot position respectively, and, after two described sides of described piston only push by press machine, be filled in described locating slot.
Preferably, in above-mentioned piston, on described piston only, for the described side that is connected with described locating slot, before described press machine extruding, be cylindrical side wall, the sidewall of the described side after extruding is deformed into conical surface.
Preferably, in above-mentioned piston, described piston only comprises:
Piston main body;
Offer the front sleeve of the first center hole, one end interference fit of described front sleeve one end and described piston main body;
Offer the rear sleeve of the second center hole, the other end interference fit of described rear sleeve one end and described piston main body, one end that one end that described front sleeve does not connect with described piston main body is not connected with described piston main body with described rear sleeve is corresponding with a described locating slot position respectively, and is filled in described locating slot after pushing by press machine.
Preferably, in above-mentioned piston, on described front sleeve, for filling the end of described locating slot, be first step, the one section of sidewall being connected with described first step on described front sleeve is tapered sidewalls, described first step is cylindrical side wall before described press machine extruding, and the described first step after extruding is deformed into the conical surface joining with described tapered sidewalls.
Preferably, in above-mentioned piston, on described rear sleeve, for filling the end of described locating slot, be second step, the one section of sidewall being connected with described second step on described rear sleeve is tapered sidewalls, described second step is cylindrical side wall before described press machine extruding, and the described second step after extruding is deformed into the conical surface joining with described tapered sidewalls.
Preferably, in above-mentioned piston, on described piston rod, the described locating slot being connected for the end with described front sleeve is to be positioned at described piston rod end along the step surface circumferentially arranging.
Preferably, in above-mentioned piston, two described locating slots are arranged in the outside of the central axis segment of described piston rod side by side.
, comprising cylinder barrel and piston, described piston is above described piston.
A manufacturing process for piston, comprising:
Step 1: manufacture the piston only with center hole, the two side ends of described piston only is respectively arranged with the annular sidewall coaxial with center hole;
Step 2: manufacture the piston rod with described piston only adaptation, on the sidewall of described piston rod, process two annular positioning grooves, the axial distance between two described locating slots is consistent with the axial distance between two described annular sidewalls on described piston only;
Step 3: described piston rod is sheathed in the center hole of described piston only, and the position at two described locating slot places is corresponding with the position at a described annular sidewall place respectively;
Step 4: by press machine, the described annular sidewall of described piston only two side ends is pushed simultaneously, so that described annular sidewall is filled in described locating slot.
From above-mentioned technological scheme, can find out, in piston provided by the invention, piston rod is sheathed in piston only, and by press machine, both are directly pushed fixingly, in manufacture process, only need to guarantee that the center hole of piston only and the required precision of piston rod can guarantee between piston only and piston rod the required precision about coaxality.In piston provided by the invention, whole piston only is sheathed on piston rod completely, compared with prior art, extended the overlap length between piston rod and piston only, be conducive to strengthen the annexation between piston rod and piston only, be beneficial to the coaxality guaranteeing between piston rod and piston only and do not change.
Visible, piston provided by the invention, not only simple in structure, easily manufactured, and the coaxiality error of having avoided available technology adopting bolt connecting mode to bring, no matter piston provided by the invention is in manufacturing or in use, the coaxality between piston rod and piston only is all far above the piston forming by hand assembled manufacture in prior art, thereby extended to a great extent the working life of cylinder.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technological scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the decomposition texture schematic diagram of piston of the prior art;
The structural representation of the piston that Fig. 2 provides for the present invention's the first specific embodiment;
The decomposition texture schematic diagram of the piston that Fig. 3 provides for the present invention's the first specific embodiment;
The structural representation of the piston that Fig. 4 provides for the present invention's the second specific embodiment;
The decomposition texture schematic diagram of the piston that Fig. 5 provides for the present invention's the second specific embodiment;
The structural representation of the piston that Fig. 6 provides for the present invention's the 3rd specific embodiment;
The decomposition texture schematic diagram of the piston that Fig. 7 provides for the present invention's the 3rd specific embodiment;
The structural representation of the piston that Fig. 8 provides for the present invention's the 4th specific embodiment;
The decomposition texture schematic diagram of the piston that Fig. 9 provides for the present invention's the 4th specific embodiment.
Wherein, 1 is bolt, and 2 is front sleeve, and 3 is piston main body, and 4 is rear sleeve, and 5 is piston rod, and 21 is counterbore, and 41 is through hole, and 51 is interior threaded hole, and 52 is locating slot.
Embodiment
The invention discloses a kind of piston and a kind of cylinder that is provided with this piston, the invention also discloses the manufacturing process of above-mentioned piston, in above-mentioned piston, coaxality between piston rod and piston only far above in prior art by the piston of hand assembled, thereby extended to a great extent working life of cylinder.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technological scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiments.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment who obtains under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 2-Fig. 9, the structural representation of the piston that Fig. 2 provides for the present invention's the first specific embodiment, the decomposition texture schematic diagram of the piston that Fig. 3 provides for the present invention's the first specific embodiment, the structural representation of the piston that Fig. 4 provides for the present invention's the second specific embodiment, the decomposition texture schematic diagram of the piston that Fig. 5 provides for the present invention's the second specific embodiment, the structural representation of the piston that Fig. 6 provides for the present invention's the 3rd specific embodiment, the decomposition texture schematic diagram of the piston that Fig. 7 provides for the present invention's the 3rd specific embodiment, the structural representation of the piston that Fig. 8 provides for the present invention's the 4th specific embodiment, the decomposition texture schematic diagram of the piston that Fig. 9 provides for the present invention's the 4th specific embodiment.
Piston provided by the invention, comprise and be provided with the piston only of center hole and be sheathed on the piston rod 5 in this center hole, on piston rod 5, be provided with two locating slots 52, two sides of piston only are corresponding with locating slot 52 positions respectively, and, after pushing by press machine, two sides of piston only are filled in locating slot 52 (when actual production, the material of piston rod is generally iron, and the material of piston only is generally aluminium).In manufacture process, on piston only, for the side that is connected with locating slot 52, before press machine extruding, be cylindrical side wall, side after press machine extruding is deformed into tapered sidewalls, specifically refer to Fig. 2, Fig. 4, Fig. 6 and Fig. 8, a-quadrant in Fig. 2 and Fig. 4 is the partial structurtes of carrying out riveting on piston, in figure, dotted line represents that two sides of piston only are cylindrical outer wall before being squeezed, and the dotted line in Fig. 6 and Fig. 8 also in like manner.
From technique scheme, can find out, in piston provided by the invention, piston rod is sheathed in piston only, and by press machine, both are directly pushed fixingly, in manufacture process, only need to guarantee that the center hole of piston only and the required precision of piston rod can guarantee between piston only and piston rod the required precision about coaxality.
And piston of the prior art is in manufacture process, not only need to guarantee the required precision of center hole and the piston rod of piston only, but also to guarantee bolt hole on piston rod and the coaxality requirement of piston rod, and on piston only for placing the coaxality requirement between the through hole of bolt and the center hole of piston only, etc., therefore, not only working process is loaded down with trivial details for it, and the coaxality between piston only and piston rod requires to be difficult to guarantee.
In addition, especially in single rod piston of the prior art, owing to needing to be provided for placing the counterbore of bolt on piston only, therefore piston rod only with part piston only overlapping on axial length (referring to Fig. 1), thereby in use the coaxality between piston rod and piston only easily changes.By contrast, in piston provided by the invention, whole piston only is sheathed on piston rod completely, thereby extended the overlap length between piston rod and piston only, be conducive to strengthen the annexation between piston rod and piston only, be beneficial to the coaxality guaranteeing between piston rod and piston only and do not change.
Visible, piston provided by the invention, not only simple in structure, easily manufactured, and the coaxiality error of having avoided available technology adopting bolt connecting mode to bring, no matter piston provided by the invention is in manufacturing or in use, the coaxality between piston rod and piston only is all far above the piston forming by hand assembled manufacture in prior art, thereby extended to a great extent the working life of cylinder.
In the first specific embodiment provided by the invention, above-mentioned piston is the SC standard type cylinder piston (single removing from mould cylinder) in SC cylinder piston, as shown in Figures 2 and 3.
In the first specific embodiment, the piston only of SC type Standard Cylinder piston comprises piston main body 3, offer the front sleeve 2 of the first center hole and offer the rear sleeve 4 of the second center hole, front sleeve 2 and rear sleeve 4 lay respectively at piston main body 3 two ends and with its interference fit; Piston rod 5 is sheathed in the first center hole and the second center hole, on piston rod 5, be provided with two locating slots 52, front sleeve 2 is not corresponding with locating slot 52 positions with one end that piston main body 3 connects, rear sleeve 4 is not corresponding with another locating slot 52 positions with one end that piston main body 3 connects, and, front sleeve 2 and rear sleeve 4 respectively with piston rod 5 drive fits after, by press machine, synchronously push the end of front sleeve 2 and the end of rear sleeve 4 simultaneously, it is filled in locating slot 52, thereby piston only is fixedly connected with piston rod.
In above-mentioned the first specific embodiment, on front sleeve 2, for filling the end of locating slot 52, be first step, the one section of sidewall being connected with first step on front sleeve 2 is tapered sidewalls, first step is cylindrical side wall before press machine extruding, and the first step after extruding is deformed into the conical surface joining with tapered sidewalls.In like manner, on rear sleeve 4, for filling the end of locating slot 52, be second step, the one section of sidewall being connected with second step on rear sleeve 4 is tapered sidewalls, and second step is cylindrical side wall before press machine extruding, and the second step after extruding is deformed into the conical surface joining with tapered sidewalls.
And on the piston rod 5 in above-mentioned the first specific embodiment, the locating slot 52 being connected for the end with front sleeve 2 is for being positioned at piston rod 5 ends along the step surface (as shown in Figure 3) circumferentially arranging.
The present invention also provides the second specific embodiment, and the piston in the second specific embodiment is the two removing from mould cylinder pistons of SC, as shown in Figure 4 and Figure 5.In the second specific embodiment, the concrete structure of piston only is identical with the piston only structure in the first specific embodiment, but piston rod construction is different.On the piston rod 5 of the two removing from mould cylinder pistons of SC, two locating slots 52 are arranged in the outside (as shown in Figure 5) of the central axis segment of piston rod 5 side by side.Identical with the first specific embodiment, the assembly structure of the two removing from mould cylinder pistons of SC is similarly, and piston rod 5 is arranged in the center hole of piston only, then, by press machine two sides of extrusion piston body synchronously simultaneously, it is filled in locating slot 52.
The present invention also provides the 3rd specific embodiment, and the piston in the 3rd specific embodiment is the single removing from mould cylinder piston in MAL cylinder, as shown in Figure 6 and Figure 7.Piston rod in this cylinder piston is identical with the piston rod construction in the first specific embodiment, but the structure of piston only is different, this piston only two side ends is directly provided with the annular sidewall for being connected with piston rod 5 rivetings, and front sleeve and rear sleeve are not set.The assembly structure of this piston is similarly, by press machine simultaneously synchronously the annular sidewall of extrusion piston body two side ends to be filled in the locating slot 52 of piston rod.
The present invention also provides the 4th specific embodiment, and the piston in the 4th specific embodiment is the two removing from mould cylinder pistons in MAL series cylinder, as shown in Figure 8 and Figure 9.Piston only in this cylinder piston is identical with the piston only structure in the 3rd specific embodiment, and piston rod is identical with the structure of piston rod in the second specific embodiment.Assembly structure between piston only and piston rod is similarly, by press machine simultaneously synchronously the annular sidewall of extrusion piston body two side ends to be filled in the locating slot 52 of piston rod.
But, those skilled in the art hold is intelligiblely, piston riveting technology provided by the invention, be not limited to the cylinder of the serial Multiple Types such as SC, SU, QG, QGB, MA, MB, MAL, SDA, SSA, STA, CQ, TDA, CU....., the linkage structure that is above-mentioned piston only and piston rod can also be applicable to other polytype piston, and the present invention is to this and be not specifically limited.
According to technique scheme, the present invention also provides a kind of cylinder, and this cylinder comprises cylinder barrel and piston, and the concrete structure of this piston is according to the piston setting described in above-mentioned specific embodiment.
To sum up, the manufacturing process of piston provided by the invention, comprises the following steps:
Step 1: manufacture the piston only with center hole, the two side ends of piston only is respectively arranged with the annular sidewall coaxial with center hole;
Step 2: manufacture the piston rod 5 with piston only adaptation, process axial distance between 52, two locating slots 52 of two annular positioning grooves on the sidewall of piston rod 5 consistent with the axial distance between two annular sidewalls on piston only;
Step 3: piston rod 5 is sheathed in the center hole of piston only, and the position at two locating slot 52 places is corresponding with the position at an annular sidewall place respectively;
Step 4: by press machine, the annular sidewall of piston only two side ends is synchronously pushed simultaneously, annular sidewall is filled in the locating slot 52 of piston rod 5.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To these embodiments' multiple modification, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (9)
1. a piston, is characterized in that, comprising:
Be provided with the piston only of center hole;
Be sheathed on the piston rod (5) in the described center hole of described piston only, on described piston rod (5), be provided with two locating slots (52), two sides of described piston only are corresponding with a described locating slot (52) position respectively, and, after two described sides of described piston only push by press machine, be filled in described locating slot (52).
2. piston according to claim 1, is characterized in that, on described piston only, for the described side that is connected with described locating slot (52), before described press machine extruding, is cylindrical side wall, and the sidewall of the described side after extruding is deformed into conical surface.
3. piston according to claim 1, is characterized in that, described piston only comprises:
Piston main body (3);
Offer the front sleeve (2) of the first center hole, one end interference fit of described front sleeve (2) one end and described piston main body (3);
Offer the rear sleeve (4) of the second center hole, the other end interference fit of described rear sleeve (4) one end and described piston main body (3), one end that one end that described front sleeve (2) does not connect with described piston main body (3) is not connected with described piston main body (3) with described rear sleeve (4) is corresponding with a described locating slot (52) position respectively, and is filled in described locating slot (52) after pushing by press machine.
4. piston according to claim 3, it is characterized in that, described front sleeve (2) is upper is first step for filling the end of described locating slot (52), the upper one section of sidewall being connected with described first step of described front sleeve (2) is tapered sidewalls, described first step is cylindrical side wall before described press machine extruding, and the described first step after extruding is deformed into the conical surface joining with described tapered sidewalls.
5. piston according to claim 3, it is characterized in that, described rear sleeve (4) is upper is second step for filling the end of described locating slot (52), the upper one section of sidewall being connected with described second step of described rear sleeve (4) is tapered sidewalls, described second step is cylindrical side wall before described press machine extruding, and the described second step after extruding is deformed into the conical surface joining with described tapered sidewalls.
6. piston according to claim 1, is characterized in that, described piston rod (5) is upper, and the described locating slot (52) being connected for the end with described front sleeve (2) is for being positioned at described piston rod (5) end along the step surface circumferentially arranging.
7. piston according to claim 1, is characterized in that, two described locating slots (52) are arranged in the outside of the central axis segment of described piston rod (5) side by side.
8. a cylinder, comprises cylinder barrel and piston, it is characterized in that, described piston is the piston described in claim 1-7 any one.
9. a manufacturing process for piston, is characterized in that, comprising:
Step 1: manufacture the piston only with center hole, the two side ends of described piston only is respectively arranged with the annular sidewall coaxial with center hole;
Step 2: manufacture the piston rod (5) with described piston only adaptation, on the sidewall of described piston rod (5), process two annular positioning grooves (52), the axial distance between two described locating slots (52) is consistent with the axial distance between two described annular sidewalls on described piston only;
Step 3: described piston rod (5) is sheathed in the center hole of described piston only, and the position at two described locating slots (52) place is corresponding with the position at a described annular sidewall place respectively;
Step 4: by press machine, the described annular sidewall of described piston only two side ends is pushed simultaneously, so that described annular sidewall is filled in described locating slot (52).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310511744.5A CN103527556A (en) | 2013-10-24 | 2013-10-24 | Piston, air cylinder and manufacturing process of piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310511744.5A CN103527556A (en) | 2013-10-24 | 2013-10-24 | Piston, air cylinder and manufacturing process of piston |
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| Publication Number | Publication Date |
|---|---|
| CN103527556A true CN103527556A (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310511744.5A Pending CN103527556A (en) | 2013-10-24 | 2013-10-24 | Piston, air cylinder and manufacturing process of piston |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439962A (en) * | 2014-11-19 | 2015-03-25 | 柳州科尔特锻造机械有限公司 | Piston rod machining process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU496383A2 (en) * | 1974-04-26 | 1975-12-25 | Device for axial fixation of parts | |
| DE3124022A1 (en) * | 1981-06-19 | 1982-12-30 | Wabco Steuerungstechnik GmbH & Co, 3000 Hannover | Piston with piston rod |
| US4630958A (en) * | 1982-10-04 | 1986-12-23 | Sim-Tech Limited | Attaching coaxially a member or fitting with a bore therethrough to a shaft |
| DE4000245C1 (en) * | 1990-01-06 | 1991-02-28 | Guenther 7307 Aichwald De Hahn | Pressurised gas spring with cylinder - has annular groove in piston rod collar, whose depth permits retaining extra O=ring |
| CN2687418Y (en) * | 2004-03-26 | 2005-03-23 | 尹向阳 | Air spring |
| CN203516288U (en) * | 2013-10-24 | 2014-04-02 | 梁克 | Piston and air cylinder |
-
2013
- 2013-10-24 CN CN201310511744.5A patent/CN103527556A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU496383A2 (en) * | 1974-04-26 | 1975-12-25 | Device for axial fixation of parts | |
| DE3124022A1 (en) * | 1981-06-19 | 1982-12-30 | Wabco Steuerungstechnik GmbH & Co, 3000 Hannover | Piston with piston rod |
| US4630958A (en) * | 1982-10-04 | 1986-12-23 | Sim-Tech Limited | Attaching coaxially a member or fitting with a bore therethrough to a shaft |
| DE4000245C1 (en) * | 1990-01-06 | 1991-02-28 | Guenther 7307 Aichwald De Hahn | Pressurised gas spring with cylinder - has annular groove in piston rod collar, whose depth permits retaining extra O=ring |
| CN2687418Y (en) * | 2004-03-26 | 2005-03-23 | 尹向阳 | Air spring |
| CN203516288U (en) * | 2013-10-24 | 2014-04-02 | 梁克 | Piston and air cylinder |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104439962A (en) * | 2014-11-19 | 2015-03-25 | 柳州科尔特锻造机械有限公司 | Piston rod machining process |
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Application publication date: 20140122 |