CN204805212U - Hydraulic cylinder's piston and piston rod fastening structure and hydraulic cylinder - Google Patents
Hydraulic cylinder's piston and piston rod fastening structure and hydraulic cylinder Download PDFInfo
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- CN204805212U CN204805212U CN201520295259.3U CN201520295259U CN204805212U CN 204805212 U CN204805212 U CN 204805212U CN 201520295259 U CN201520295259 U CN 201520295259U CN 204805212 U CN204805212 U CN 204805212U
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- piston
- piston rod
- fastening structure
- counter bore
- fastening piece
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Abstract
The utility model relates to a hydraulic cylinder's piston and piston rod fastening structure, piston (2) are inside including an axially extending bore who supplies piston rod (6) to pass, still including the portion of holding (3') with for piston rod (6) axial fixity's stop part (3), assembled to piston rod (6) last time through an axially extending bore when piston (2), stop part (3) lie in and hold (3') to restriction piston rod (6) is for piston (2) in the ascending removal of the primary shaft, still include fastener (5), fastener (5) be used for with stop part (3) fastening in the portion of holding (3'), fastener (5) can restrict piston rod (6) for piston (2) with the primary shaft to the ascending removal of opposite secondary shaft. The utility model discloses still relate to a hydraulic cylinder. The utility model discloses piston assembly's range of application be can improve, complexity and cost that piston assembly processed are reduced.
Description
Technical field
The utility model relates to Hydraulic Field, particularly a kind of piston of hydraulic jack and piston rod fastening structure and hydraulic jack.
Background technique
Hydraulic jack is a kind of executive component of the mechanical energy of linear reciprocating motion by the hydraulic energy transfer of pressure oil, and its structure, primarily of compositions such as cylinder barrel, piston rod, piston, guide sleeves, acts on side face of piston ring by hydraulic oil and realizes its linear reciprocation action.
The using scope of current hydraulic jack is extensive, and operating mode is complicated.Need piston to be in oil cylinder neutral position and the area ratio of large loculus is roughly equal in some operating modes.
In order to realize the fastening of piston and piston rod, the general measures taked at present is that processing step carries out spacing to piston on the piston rod, then utilizes being threaded or utilizing fastening nuts between piston with piston rod.But be in oil cylinder neutral position for needing piston and the working condition requirement that the area ratio of loculus is roughly equal greatly, due to the change of the piston rod two ends diameter that processing step causes, such form can not meet the demands.Be illustrated in figure 1 the fit system of existing piston and piston rod.Wherein, piston a2 and piston rod a4 matches, by being arranged on step on piston rod a4 to piston limit.Being threaded of nut a1 and piston rod a4 of recycling realizes the fastening of piston a2.Piston rod a4 processes sealed groove, seal ring a3 is placed in groove the static seal realizing piston a2 and piston rod a4.The fit system of this form, because processing step changes the diameter at piston rod connection piston two ends, under making it the operating mode that can not be used for needing to keep the area ratio of large loculus roughly equal on the piston rod; In addition, piston rod is processed with the structures such as sealed groove, screw thread, step, piston rod processed complex.
Model utility content
The purpose of this utility model is to provide a kind of piston of hydraulic jack and piston rod fastening structure and hydraulic jack, to improve the application area of the piston assembly of hydraulic jack, reduces complexity and the cost of the processing of piston assembly.
The utility model provides a kind of piston and piston rod fastening structure of hydraulic jack, and wherein, described piston 2 inside comprises the first axial hole passed for described piston rod 6; Also comprise accommodating part 3 ' and the stop member 3 relative to described piston rod 6 axial restraint, when described piston 2 is assembled on described piston rod 6 through described first axial hole, described stop member 3 is positioned at described accommodation section 3 ', to limit described piston rod 6 relative to piston 2 in the first movement axially; Also comprise fastening piece 5, described fastening piece 5 for described stop member 3 is fastened in described accommodation section 3 ', described fastening piece 5 can limit described piston rod 6 relative to piston 2 with second of described first axial opposed the movement axially.
Further, described piston rod 6 arranges annular groove RC, arrange the first circular counter bore RC1 in described piston 2, the diameter of this first circular counter bore RC1 is greater than the diameter of the first axial hole of described piston 2; When described piston 2 is arranged on described piston rod 6, a part for described stop member 3 snaps in described annular groove RC, and another part snaps in described first circular counter bore, thus limits described piston rod 6 relative to piston 2 in the described first movement axially.
Further, described fastening piece 5 inside comprises the second axial hole passed for described piston rod 6; Also be provided with the second circular counter bore RC2 be positioned at outside described first circular counter bore RC1 in described piston 2, the diameter of described second circular counter bore RC2 is greater than the diameter of described first circular counter bore RC1; Described fastening piece 5 has the outside thread with the screw-internal thread fit of described second circular counter bore RC2, can be threaded connection and be fixed in described second circular counter bore RC2, to limit the movement of described stop member 3, thus limit described piston rod 6 relative to piston 2 in the described second movement axially.
Further, described stop member 3 is the projection along the radial direction of described piston rod 6 is formed, described projection and described piston rod 6 is one-body molded or described projection is detachably fixedly connected on described piston rod 6.
Further, described stop member 3 is key or back-up ring.
Further, described key is semicircle card key, and described back-up ring is axle-steel silk back-up ring.
Further, also comprise seal ring 1, it is inner that described seal ring 1 is arranged on described first axial hole.
Further, between described fastening piece 5 and described piston 2, being also provided with locking gear 4,4 ', loosening relative to described piston 2 for preventing described fastening piece 5.
Further, described locking gear 4,4 ' for along the backing-up screw be axially fixed between described fastening piece 5 and described piston 2 of described fastening piece 5, or for leaning the backing-up screw on the periphery of described fastening piece 5 along described fastening piece 5 radially across described piston 2.
Further, described hydraulic jack for two go out hydraulic jack, described piston rod 6 is in the equal diameters at described piston 2 two ends.
For achieving the above object, the utility model additionally provides a kind of hydraulic jack, comprises piston and the piston rod fastening structure of piston 2, piston rod 6 and aforesaid hydraulic jack.
The connection fastening means of piston of the present utility model and piston rod does not need to change diameter of piston rod, therefore, it is possible to adapt to various types of hydraulic jack, improves application area; Owing to not needing to process sealed groove and screw thread, step etc. on the piston rod structure, because this reducing the processed complex degree of piston rod, simplifying processing technology, reducing processing cost.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the sectional drawing of existing piston and piston rod fastening structure.
Fig. 2 is the sectional drawing of a specific embodiment of piston of the present utility model and piston rod fastening structure.
Fig. 3 is the sectional drawing of another specific embodiment of piston of the present utility model and piston rod fastening structure.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Fig. 2 shows the piston of the utility model hydraulic jack and a specific embodiment of piston rod fastening structure.In fig. 2, hydraulic jack has piston 2 and piston rod 6, and wherein, piston 2 inside comprises the first axial hole passed for described piston rod 6; Also comprise accommodating part 3 ' and the stop member 3 relative to described piston rod 6 axial restraint, when described piston 2 is assembled on described piston rod 6 through described first axial hole, described stop member 3 is positioned at described accommodation section 3 ', to limit described piston rod 6 relative to piston 2 in the first movement axially; Also comprise fastening piece 5, described fastening piece 5 for described stop member 3 is fastened in described accommodation section 3 ', described fastening piece 5 can limit described piston rod 6 relative to piston 2 with second of described first axial opposed the movement axially.By above-mentioned setting, do not need to change diameter of piston rod, therefore, it is possible to adapt to various types of hydraulic jack, improve application area; And owing to not needing to process sealed groove and screw thread, step etc. on the piston rod structure, because this reducing the processed complex degree of piston rod, simplify processing technology, reduce processing cost.
Particularly, described piston rod 6 arranges annular groove RC, arrange the first circular counter bore RC1 in described piston 2, the diameter of this first circular counter bore RC1 is greater than the diameter of the first axial hole of described piston 2; When described piston 2 is arranged on described piston rod 6, a part for described stop member 3 snaps in described annular groove RC, and another part snaps in described first circular counter bore, thus limits described piston rod 6 relative to piston 2 in the described first movement axially.The step that the first circular counter bore RC1 in the step that annular groove RC is formed on piston rod 6 and described piston 2 is formed jointly used under, described piston rod, under the effect of described stop member 3, is limited mobile on the first axial direction relative to described piston 2.
Below, fastening piece 5 is described.Described fastening piece 5 inside comprises the second axial hole passed for described piston rod 6; Also be provided with the second circular counter bore RC2 be positioned at outside described first circular counter bore RC1 in described piston 2, the diameter of described second circular counter bore RC2 is greater than the diameter of described first circular counter bore RC1; Described fastening piece 5 has the outside thread with the screw-internal thread fit of described second circular counter bore RC2, can be threaded connection and be fixed in described second circular counter bore RC2, to limit the movement of described stop member 3, thus limit described piston rod 6 relative to piston 2 in the described second movement axially.Therefore, on described piston rod 6 annular groove RC formed step and described piston 2 in second circular counter bore RC2 formed step jointly used under, described piston rod, under the effect of described stop member 3, is limited mobile on the second axial direction relative to described piston 2.And in conjunction with the first circular counter bore RC1 of piston 2 and the common restriction of fastening piece 5 pairs of stop members 3, make piston rod 6 can be relative fixing with piston 2.
Selection about stop member 3 can have various ways.In one embodiment, stop member 3 is the projection along the radial direction of described piston rod 6 is formed, described projection and described piston rod 6 is one-body molded or described projection is detachably fixedly connected on described piston rod 6.
In another embodiment, described stop member 3 is key or back-up ring, and particularly, described key is semicircle card key, and described back-up ring is axle-steel silk back-up ring.
For preventing leakage of oil, also comprise seal ring 1, it is inner that described seal ring 1 is arranged on described first axial hole.Can either sealing effect be ensured like this, also without the need to processing seal groove on the piston rod, and then simplify processing technology, reducing processing cost.
In order to ensure fastening piece realization fastening effect securely, in the embodiment shown in Fig. 2 and Fig. 3, also further comprising locking gear 4,4 ', loosening relative to described piston 2 for preventing described fastening piece 5.In one embodiment, as shown in Figure 2, this locking gear 4 is for leaning the backing-up screw on the periphery of described fastening piece 5 along described fastening piece 5 radially across described piston 2; In another embodiment, as shown in Figure 3, this locking gear 4 is the backing-up screw be axially fixed between described fastening piece 5 and described piston 2 along described fastening piece 5.
The hydraulic jack that above-mentioned fastening structure is applied can be singly go out hydraulic jack, also be applicable to two go out hydraulic jack, the situation of piston rod 6 in the equal diameters at described piston 2 two ends can be adapted to, compared to the structure needing the diameter changing piston two ends in prior art, the present embodiment Applicable scope is wider.
The utility model also provides a kind of hydraulic jack, comprises piston 2, piston rod 6 and above-mentioned fastening structure.The hydraulic jack that have employed above-mentioned fastening structure is better than adopting existing processing step on the piston rod to carry out spacing to piston in processed complex degree and cost, then utilizes being threaded or utilizing the hydraulic jack of fastening structure of fastening nuts between piston with piston rod.
Finally should be noted that: above embodiment is only in order to illustrate that the technical solution of the utility model is not intended to limit; Although be described in detail the utility model with reference to preferred embodiment, those of ordinary skill in the field have been to be understood that: still can modify to embodiment of the present utility model or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solutions of the utility model, it all should be encompassed in the middle of the technological scheme scope of the utility model request protection.
Claims (11)
1. the piston of hydraulic jack and a piston rod fastening structure, is characterized in that, described piston (2) inside comprises the first axial hole passed for described piston rod (6); Also comprise accommodating part (3 ') and the stop member (3) relative to described piston rod (6) axial restraint, when described piston (2) is assembled on described piston rod (6) through described first axial hole, described stop member (3) is positioned at described accommodation section (3 '), to limit described piston rod (6) relative to piston (2) in the first movement axially; Also comprise fastening piece (5), described fastening piece (5) for described stop member (3) is fastened in described accommodation section (3 '), described fastening piece (5) can limit described piston rod (6) relative to piston (2) with second of described first axial opposed the movement axially.
2. fastening structure as claimed in claim 1, it is characterized in that, described piston rod (6) is arranged annular groove (RC), arrange the first circular counter bore (RC1) in described piston (2), the diameter of this first circular counter bore (RC1) is greater than the diameter of the first axial hole of described piston (2); When described piston (2) is arranged on described piston rod (6), a part for described stop member (3) snaps in described annular groove (RC), another part snaps in described first circular counter bore, thus limits described piston rod (6) relative to piston (2) in the described first movement axially.
3. fastening structure as claimed in claim 2, is characterized in that, described fastening piece (5) inside comprises the second axial hole passed for described piston rod (6); Also be provided with the second circular counter bore (RC2) being positioned at described first circular counter bore (RC1) outside in described piston (2), the diameter of described second circular counter bore (RC2) is greater than the diameter of described first circular counter bore (RC1); Described fastening piece (5) has the outside thread with the screw-internal thread fit of described second circular counter bore (RC2), can be threaded connection and be fixed in described second circular counter bore (RC2), to limit the movement of described stop member (3), thus limit described piston rod (6) relative to piston (2) in the described second movement axially.
4. fastening structure as claimed in claim 1, it is characterized in that, described stop member (3) for along the projection that the radial direction of described piston rod (6) is formed, described projection and described piston rod (6) is one-body molded or described projection is detachably fixedly connected on described piston rod (6).
5. fastening structure as claimed in claim 2, it is characterized in that, described stop member (3) is key or back-up ring.
6. fastening structure as claimed in claim 5, it is characterized in that, described key is semicircle card key, and described back-up ring is axle-steel silk back-up ring.
7. fastening structure as claimed in claim 1, is characterized in that, also comprise seal ring (1), and it is inner that described seal ring (1) is arranged on described first axial hole.
8. fastening structure as claimed in claim 1, it is characterized in that, locking gear (4 is also provided with between described fastening piece (5) and described piston (2), 4 '), for preventing described fastening piece (5) loosening relative to described piston (2).
9. fastening structure according to claim 8, it is characterized in that, described locking gear (4,4 ') for along the backing-up screw be axially fixed between described fastening piece (5) and described piston (2) of described fastening piece (5), or be lean the backing-up screw on the periphery of described fastening piece (5) along described fastening piece (5) radially across described piston (2).
10. fastening structure as claimed in claim 1, is characterized in that, described hydraulic jack for two go out hydraulic jack, described piston rod (6) is in the equal diameters at described piston (2) two ends.
11. 1 kinds of hydraulic jacks, is characterized in that, comprise piston (2), piston rod (6) and as arbitrary in claim 1 ~ 10 as described in the piston of hydraulic jack and piston rod fastening structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520295259.3U CN204805212U (en) | 2015-05-08 | 2015-05-08 | Hydraulic cylinder's piston and piston rod fastening structure and hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520295259.3U CN204805212U (en) | 2015-05-08 | 2015-05-08 | Hydraulic cylinder's piston and piston rod fastening structure and hydraulic cylinder |
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| Publication Number | Publication Date |
|---|---|
| CN204805212U true CN204805212U (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520295259.3U Active CN204805212U (en) | 2015-05-08 | 2015-05-08 | Hydraulic cylinder's piston and piston rod fastening structure and hydraulic cylinder |
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| CN (1) | CN204805212U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578374A (en) * | 2019-01-14 | 2019-04-05 | 宁波市海达塑料机械有限公司 | A kind of Split type hydraulic the cylinder piston structure |
| CN111140565A (en) * | 2019-12-27 | 2020-05-12 | 江苏万川液压机械设备有限公司 | Piston linking mechanism |
-
2015
- 2015-05-08 CN CN201520295259.3U patent/CN204805212U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109578374A (en) * | 2019-01-14 | 2019-04-05 | 宁波市海达塑料机械有限公司 | A kind of Split type hydraulic the cylinder piston structure |
| CN111140565A (en) * | 2019-12-27 | 2020-05-12 | 江苏万川液压机械设备有限公司 | Piston linking mechanism |
| CN111140565B (en) * | 2019-12-27 | 2022-04-08 | 江苏万川液压机械设备有限公司 | Piston linking mechanism |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |