CN203892291U - Hinged inner rod type single-action cylinder - Google Patents
Hinged inner rod type single-action cylinder Download PDFInfo
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- CN203892291U CN203892291U CN201420310760.8U CN201420310760U CN203892291U CN 203892291 U CN203892291 U CN 203892291U CN 201420310760 U CN201420310760 U CN 201420310760U CN 203892291 U CN203892291 U CN 203892291U
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- piston
- hinged
- type single
- rod
- acting cylinder
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Abstract
The utility model discloses a hinged inner rod type single-action cylinder which comprises a cylinder body, a front end cover, a rear end cover and a piston assembly. The piston assembly comprises a piston and a piston rod with the rear end hinged to the piston. The front end cover is provided with a through hole, wherein the piston rod can penetrate out of the through hole in a swinging mode. A compression spring used for providing elastic restoring force in the front and back direction for the piston is arranged between the piston and the front end cover. The single-action cylinder can output nonlinear motion like reciprocating swinging motion, the axial size of the single-action cylinder is small, the mechanical property is excellent, and the impact is small; in addition, the single-action cylinder is simple in structure, the number of parts is small, and the mechanical efficiency is high.
Description
Technical field
the utility model relates to a kind of hinged interior rod-type single-acting cylinder.
Background technique
in prior art, general Fixed-hydraulic cylinder or cylinder, piston rod can only outputting reciprocating linear movement.While exporting the on-rectilinear movements such as reciprocally swinging when needs, the general method adopting mainly contains two kinds: a kind of is that front end at piston rod 12 ' cuts with scissors a upper connecting rod 13 ', to solve the problem of degrees of freedom deficiency, as shown in Figure 1, that to be whole device make progress at oil hydraulic cylinder or cylinder axis the shortcoming of this method is oversize, the utmost point is not compact, simultaneously, in movement process, additional connecting rod 13 ' has radial component to piston rod 12 ', thereby piston rod 12 ' is formed to moment of flexure, easily cause the distortion of piston rod, produce amount of deflection; Another kind is oil hydraulic cylinder or the pneumatic cylinder that adopts rear end hinge, as shown in Figure 2, the shortcoming of this method is that cylinder body 21 ', piston 23 ' swing together with piston rod 22 ', the quality of swinging unit is excessive, cause inertial force very large, thereby form very large impact, the stress of whole device is severe, and impact noise is also larger.
to sum up, create a kind of cylinder body and fix, do not need additional connecting rod, and can export oil hydraulic cylinder or the cylinder of the on-rectilinear movements such as reciprocally swinging, in fields such as engineering machinery, there is very positive meaning.
Summary of the invention
the purpose of this utility model is to provide that a kind of axial dimension is little, mechanical property good, and can export the hinged interior rod-type single-acting cylinder of the on-rectilinear movements such as reciprocally swinging.
for achieving the above object, the technical solution adopted in the utility model is: a kind of hinged interior rod-type single-acting cylinder, comprise cylinder body, front cover, rear end cover and piston assembly, described piston assembly comprises that piston, rear end are hinged on the piston rod on described piston, on described front cover, offer the through hole that can swingingly pass for described piston rod, between described piston and described front cover, be provided with for the Returnning spring of described piston along fore-and-aft direction elastic-restoring force is provided.
preferably, described Returnning spring is Compress Spring.
further preferably, described Compress Spring is non-linear dish-shaped spring.
preferably, the rear end of described piston rod is hinged on described piston by bearing pin.
preferably, the rear end of described piston rod has bulb, and the front end of described piston is fixedly provided with the ball cup matching with described bulb, is located on described ball cup described bulb universal rotational.
further preferably, on described piston, offer opening groove forward, described ball cup comprises the supporting base that is housed in described groove and has inner ball surface, for described supporting base being fixed on to the gland of described groove, on described gland, offer endoporus, in described endoporus, be provided with opening elastic ring, between described bulb and described inner ball surface, sphere-contact and described opening elastic ring are fastened on described bulb.
as a kind of concrete mode of execution, described opening elastic ring is C shape circle.
due to the utilization of technique scheme, the utility model compared with prior art has following advantages:
hinged interior rod-type single-acting cylinder of the present utility model, due to piston rod is hinged on piston, has solved the defect that traditional single-acting cylinder only can outputting reciprocating linear movement, and it can export the on-rectilinear movements such as reciprocally swinging.This compares the mode of front end articulated linkage of the piston rod of traditional Fixed-hydraulic cylinder or cylinder, has greatly dwindled axial dimension; And compare oil hydraulic cylinder or the cylinder of rear end hinge, swinging unit quality significantly reduces, thereby reduce significantly, impacts the negative effect bringing.Single-acting cylinder of the present utility model is simple in structure, and parts are less, and manufacture and assembly process process are good, and cost of production is low.
Accompanying drawing explanation
accompanying drawing 1 is that in prior art, piston rod front end is hinged with the oil hydraulic cylinder of connecting rod or the structural representation of pneumatic cylinder;
accompanying drawing 2 is the oil hydraulic cylinder of rear end hinge or the structural representation of pneumatic cylinder in prior art;
accompanying drawing 3 is the working principle schematic diagram one of embodiment's 1 of the present utility model single-acting cylinder;
accompanying drawing 4 is the working principle schematic diagram two of embodiment's 1 of the present utility model single-acting cylinder;
accompanying drawing 5 is the mounting structure schematic diagram of piston rod and piston in embodiment 1;
accompanying drawing 6 is the working principle schematic diagram one of embodiment's 2 of the present utility model single-acting cylinder;
accompanying drawing 7 is the working principle schematic diagram two of embodiment's 2 of the present utility model single-acting cylinder;
accompanying drawing 8 is the mounting structure schematic diagram of piston rod and piston in embodiment 2;
wherein: 11 ', 21 '-cylinder body; 12 ', 22 '-piston rod; 13 '-connecting rod; 23 '-piston.
1, cylinder body; 2, rear end cover; 3, front cover; 31, through hole; 4, piston; 5, piston rod; 51, bulb; 6, Compress Spring; 7, bearing pin; 8, ball cup; 81, supporting base; 82, gland; 83, C shape circle; 9, take-off lever group; 91, the first bar; 92, the second bar; 93, drift.
Embodiment
below in conjunction with accompanying drawing and specific embodiment, the technical solution of the utility model is further elaborated.
below in the definition about direction, be all that the direction of piston rod movement defines during according to this single-acting cylinder work, the direction that piston rod outwards moves relative to cylinder body is front, otherwise after being, that is the left and right directions in Fig. 3, Fig. 4, Fig. 6, Fig. 7, after wherein left is, right-hand is front.
embodiment 1
hinged interior rod-type single-acting cylinder referring to shown in Fig. 3, Fig. 4, comprise cylinder body 1, be fixedly arranged on cylinder body 1 rear end rear end cover 2, be fixedly arranged on front cover 3 and the piston assembly of cylinder body 1 front end.Piston assembly comprises piston 4 and piston rod 5, and the rear end of piston rod 5 is hinged on piston 4, as shown in Figure 5 by bearing pin 7.
on front cover 3, offer the through hole 31 that can swingingly pass for piston rod 5, the amplitude that the aperture of this through hole 31 should swing according to piston rod 5 is determined, thereby is formed stepping down to piston rod 5.Between rear end cover 2 and piston 4, form the pressure chamber of sealing.In cylinder body 1, between piston 4 and front cover 3, be also provided with for the Returnning spring of piston 4 along fore-and-aft direction elastic-restoring force is provided, it is nonlinear Compress Spring 6 that this Returnning spring can adopt mechanical characteristic.
in the present embodiment, the front end of piston rod 5 is connected with take-off lever group 9 for power output, and here, this take-off lever group 9 comprises the first bar 91, the second bar 92, drift 93.One end of the first bar 91 is hinged in frame, and its other end is hinged on the front end of piston rod 5, and one end of the second bar 92 is hinged on the front end of piston rod 5, and its other end is hinged on drift 93, and drift 93 can be vertically located in frame up and down.
under original state, shown in Figure 3, under the thrust of Compress Spring 6, piston 4 is positioned at the rear portion of cylinder body 1.During work, pressurized gas/hydraulic oil enters in pressure chamber by the inlet hole/oil inlet hole being opened on rear end cover 2, piston 4 moves forward, drive piston rod 5 to swing and act on the first bar 91 and the second bar 92, drive the first bar 91 and the second bar 92 to swing and drive drift 93 to move down and realize and impact.Now Compress Spring 6 is compressed between piston 4 and front cover 3, as shown in Figure 4.
when piston rod 5 travels forward after end, pressurized gas in pressure chamber passes into atmosphere or hydraulic oil is back to fuel tank, under the thrust of Compress Spring 6, promoting piston 4 moves backward, the moving piston rod 5 of the rear shipper pole of piston 4 swings, and piston rod 5 acts on the first bar 91 and the second bar 92 and drives drift 93 to move reset vertically.
certainly, when take-off lever group 9 is other mechanisms, what piston rod 5 can be according to the mechanism of its connection need to export reciprocally swinging or other on-rectilinear movements.
in the present embodiment, what Compress Spring 6 adopted is nonlinear belleville spring.Because the mechanical characteristic of belleville spring is nonlinear, while selecting belleville spring, can choose rational mechanical characteristic according to the operating mode of practical application interval, can can effectively improve the mechanical efficiency of this plunger case so that the reposition force excursion of spring is significantly dwindled like this, be conducive to energy-conservation.And traditional draft helical spring is because its mechanical characteristics is linear, its rigidity is directly proportional to its amount of deformation, while causing amount of deformation larger, it is large that its reposition force significantly becomes, and this reposition force need to consume and additionally offers plunger active force and overcome, certainly will, by under the certain condition of system pressure, cause cylinder diameter to expand, the utility model has solved this problem well, and the diameter of cylinder body further reduces compared to existing technology.In addition, belleville spring can adopt the form of lamination to improve rigidity, and this makes the ouput force of single-acting cylinder of the present utility model have larger regulation range, makes it have better versatility.
embodiment 2
referring to the hinged interior rod-type single-acting cylinder shown in Fig. 6, Fig. 7, the difference that this single-acting cylinder is compared embodiment 1 is only the Placement of piston rod 5 and piston 4.In the present embodiment, the rear end of piston rod 5 adopts the mode of bulb hinged to be connected with piston 4.Shown in Figure 8, the rear end of piston rod 5 has bulb 51, and the front end of piston 4 is fixedly provided with the ball cup 8 matching with bulb 51, is located on ball cup 8 bulb 51 universal rotationals.In the present embodiment, offer opening groove forward on piston 4, ball cup 8 comprises having the supporting base 81 of inner ball surface, the gland 82 that offers endoporus and opening elastic ring 83.
supporting base 81 is housed in the groove on piston 4, and for supporting base 81 is fixed on to above-mentioned groove, opening elastic ring 83 adopts C shape circle to 82, gland, and it is located in the endoporus of gland 82.When piston rod 5 is connected with piston 4, by the bulb of piston rod 5 51 when being pressed in the endoporus of gland 82, it is large that the radial dimension of opening elastic ring 83 becomes, the more than half part that makes bulb 51 cross opening elastic ring 83 and and sphere-contact between the inner ball surface of supporting base 81, now, the radial dimension of opening elastic ring 83 shrinks and is fastened on bulb 51, and the bulb of piston rod 5 51 is remained between supporting base 81 and gland 82.
the working principle of the single-acting cylinder of the present embodiment is similar to embodiment 1, repeats no more herein.
the Placement of piston 4 and piston rod 5 in employing the present embodiment, during this single-acting cylinder work, is sphere-contact between piston 4 and piston rod 5, compares embodiment 1 cylndrical surface articulated manner, and its working stress is little, and bearing capacity is relatively large.
to sum up, hinged interior rod-type single-acting cylinder of the present utility model, due to piston rod 5 is hinged on piston 4, has solved the defect that traditional single-acting cylinder only can outputting reciprocating linear movement, and it can export the on-rectilinear movements such as reciprocally swinging.This compares the mode of front end articulated linkage of the piston rod of traditional Fixed-hydraulic cylinder or cylinder, has greatly dwindled axial dimension; And compare oil hydraulic cylinder or the cylinder of rear end hinge, swinging unit quality significantly reduces, thereby reduce significantly, impacts the negative effect bringing.
in addition, in the utility model, adopting mechanical characteristic is nonlinear Compress Spring 6, and the excursion amplitude of its reposition force is little, has correspondingly improved the mechanical efficiency of this single-acting cylinder, and the power transmission efficiency of this single-acting cylinder is improved, and is conducive to energy-conservation.Single-acting cylinder of the present utility model is simple in structure, and parts are less, and manufacture and assembly process process are good, and cost of production is low.
above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (7)
1. a hinged interior rod-type single-acting cylinder, comprise cylinder body, front cover, rear end cover and piston assembly, it is characterized in that: described piston assembly comprises that piston, rear end are hinged on the piston rod on described piston, on described front cover, offer the through hole that can swingingly pass for described piston rod, between described piston and described front cover, be provided with for the Returnning spring of described piston along fore-and-aft direction elastic-restoring force is provided.
2. a kind of hinged interior rod-type single-acting cylinder according to claim 1, is characterized in that: described Returnning spring is Compress Spring.
3. a kind of hinged interior rod-type single-acting cylinder according to claim 2, is characterized in that: described Compress Spring is non-linear dish-shaped spring.
4. a kind of hinged interior rod-type single-acting cylinder according to claim 1, is characterized in that: the rear end of described piston rod is hinged on described piston by bearing pin.
5. a kind of hinged interior rod-type single-acting cylinder according to claim 1, it is characterized in that: the rear end of described piston rod has bulb, the front end of described piston is fixedly provided with the ball cup matching with described bulb, is located on described ball cup described bulb universal rotational.
6. a kind of hinged interior rod-type single-acting cylinder according to claim 5, it is characterized in that: on described piston, offer opening groove forward, described ball cup comprises the supporting base that is housed in described groove and has inner ball surface, for described supporting base being fixed on to the gland of described groove, on described gland, offer endoporus, in described endoporus, be provided with opening elastic ring, between described bulb and described inner ball surface, sphere-contact and described opening elastic ring are fastened on described bulb.
7. a kind of hinged interior rod-type single-acting cylinder according to claim 6, is characterized in that: described opening elastic ring is C shape circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420310760.8U CN203892291U (en) | 2014-06-12 | 2014-06-12 | Hinged inner rod type single-action cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420310760.8U CN203892291U (en) | 2014-06-12 | 2014-06-12 | Hinged inner rod type single-action cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203892291U true CN203892291U (en) | 2014-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420310760.8U Withdrawn - After Issue CN203892291U (en) | 2014-06-12 | 2014-06-12 | Hinged inner rod type single-action cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203892291U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006021A (en) * | 2014-06-12 | 2014-08-27 | 苏州劳灵精密机械有限公司 | Hinged inner rod type single-acting cylinder |
| CN111491748A (en) * | 2017-12-11 | 2020-08-04 | Cml国际有限公司 | Hydraulic operated rotary pipe bender |
-
2014
- 2014-06-12 CN CN201420310760.8U patent/CN203892291U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006021A (en) * | 2014-06-12 | 2014-08-27 | 苏州劳灵精密机械有限公司 | Hinged inner rod type single-acting cylinder |
| CN104006021B (en) * | 2014-06-12 | 2016-03-02 | 苏州劳灵精密机械有限公司 | A kind of hinged interior rod-type single-acting cylinder |
| CN111491748A (en) * | 2017-12-11 | 2020-08-04 | Cml国际有限公司 | Hydraulic operated rotary pipe bender |
| CN111491748B (en) * | 2017-12-11 | 2023-03-14 | Cml国际有限公司 | Hydraulic operated rotary pipe bender |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141022 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |