CN209396818U - A kind of single-acting cylinder and jack - Google Patents

Abstract

The utility model discloses a kind of single-acting cylinder and jack, the piston rod that stretches including cylinder barrel, relative to cylinder barrel is arranged nut, screw rod, the baffle that cylinder barrel side wall is arranged in and the rotating member that screw rod end is arranged on the piston rod, mutually matched internal screw thread and external screw thread are respectively arranged in nut inner circumferential and piston rod periphery, nut side wall is provided with threaded hole, screw rod is radially disposed in threaded hole along nut, screw rod is screwed in be clamped with baffle lower edge, and rotating member can be with baffle relative rolling.When piston rod decline, nut is threaded to piston rod bottom first, screw rod is screwed in, be clamped with the lower edge of baffle, makes nut that can only carry out the rotation of horizontal direction around piston rod.Since nut is by the movement of limitation vertical direction, while nut and piston rod are to be threadedly coupled, at this time, piston rod opposing nut moves downward, in this manner, so that nut generates a kind of effect for forcing decline to piston rod, solve the problems, such as that piston rod decline is limited.

Description

A kind of single-acting cylinder and jack

Technical field

The utility model relates to single-acting cylinder technical fields, in particular to a kind of single-acting cylinder and jack.

Background technique

Single-acting cylinder is widely used in the fields such as engineering machinery, automobile manufacture, metallurgical mine, aerospace, single-acting cylinder Only there is piston rod in one end, and rod chamber is connected directly with outside air, and rodless cavity is then connect with oil pocket, opposing seal.Single-acting Cylinder only realizes the movement in a direction, and when work realizes motive force by hydraulic or air pressure, and piston rod is pushed to have piston One end, it is protruding.Self gravity, outer weighting material or retracting spring are relied primarily on when backhaul to make piston rod be returned to raw bits It sets, is ready for movement next time.Single-acting cylinder is broadly divided into one-way cylinder according to the medium difference for generating driving effect With two kinds of single-acting cylinder, below for through the single-action hydraulic cylinder of hydraulic-driven.

During piston rod work, decline the course of work for piston rod, existing way is usually to pass through dependence Its own gravity, outer weighting material achieve the purpose that make piston rod to decline by retracting spring, depend on by self gravity There are piston rod declines come the mode that declines piston rod for the specific operative orientation of piston rod and applied force or retracting spring Limited problem.

Utility model content

The purpose of this utility model is that in view of the deficiency of the prior art, a kind of single-acting cylinder and thousand are provided Jin top, it is limited when solving the problems, such as piston rod decline in the prior art.

The embodiments of the present invention are achieved in that

A kind of single-acting cylinder, the piston rod to stretch including cylinder barrel, relative to cylinder barrel are arranged nut, spiral shell on the piston rod Bar, the baffle that cylinder barrel side wall is set and the rotating member that screw rod end is set.

Specifically mutually matched internal screw thread and external screw thread, nut are respectively arranged in the inner circumferential of nut and piston rod periphery Side wall is provided with threaded hole, and screw rod is radially disposed in threaded hole along nut, and screw rod is screwed in be clamped with baffle lower edge, rotating member energy Enough and baffle relative rolling.

Further, screw rod includes at least two, and at least two screw rods pass through threaded hole respectively and are uniformly arranged in spiral shell Female side wall.

Preferably, rotating member is bearing, and the inner ring of bearing is fixed at screw rod end.

Optionally, finite place piece is set on screw rod, the depth of nut is screwed in for limiting screw rod.

Preferably, locating part is spring catch, and screw rod has been arranged radially through-hole, and spring catch is inserted in through-hole.

Preferably, locating part is snap ring, and snap ring is sheathed on screw rod.

It optionally, further include handle, handle is fixed at nut side wall.

Preferably, handle includes two, and two handles are symmetrical arranged on the nut.

Preferably, internal screw thread and external screw thread are trapezoidal thread.

The another aspect of the utility model embodiment provides a kind of jack, including any single-acting cylinder among the above.

The beneficial effects of the utility model include:

The utility model embodiment provides a kind of single-acting cylinder and jack, including cylinder barrel, piston rod, nut, spiral shell Bar, baffle and rotating member.Piston rod can stretch relative to cylinder barrel, be arranged in cylinder barrel, nut is set in piston On bar, it is respectively arranged with mutually matched internal screw thread and external screw thread in the inner circumferential of nut and piston rod periphery, in the side wall of nut On be provided with threaded hole, have the screw rod of corresponding threaded hole setting, screw rod is radially disposed in threaded hole along nut, in screw rod End is provided with rotating member, and the side wall of cylinder barrel is provided with baffle, and screw rod can be with when radially screwing in the threaded hole of nut It is mutually clamped between the lower edge of baffle.When needing to decline in piston rod, nut is threaded to piston rod bottom first, by spiral shell Bar is screwed in the direction of piston rod, when the lower edge that screw rod is screwed into end and cylinder barrel side wall baffle is clamped, can make screw rod and It is in locking state between cylinder barrel, is then rotated further by nut, since the locking state between screw rod and cylinder barrel limits nut rotation When vertical direction displacement, when nut rotates, relative rolling between rotating member and baffle, thus in this manner, piston rod Opposing nut moves downward, so that nut generates a kind of effect for forcing decline to piston rod, solves piston in the prior art The limited problem of bar decline.

Detailed description of the invention

It, below will be to use required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.

Fig. 1 is one of the structural schematic diagram of single-acting cylinder of the utility model embodiment；

Fig. 2 is the second structural representation of the single-acting cylinder of the utility model embodiment；

Fig. 3 is one of the structural schematic diagram of nut in the single-acting cylinder of the utility model embodiment；

Fig. 4 is the second structural representation of nut in the single-acting cylinder of the utility model embodiment；

Fig. 5 is the A-A cross-sectional view in Fig. 4；

Fig. 6 is the structural schematic diagram that locating part is snap ring in the single-acting cylinder of the utility model embodiment；

Fig. 7 is the structural schematic diagram of snap ring in the single-acting cylinder of the utility model embodiment.

Icon: 100- piston rod；101- nut；102- cylinder barrel；103- screw rod；104- rotating member；105- spring catch； 1051- snap ring；106- baffle；107- liquid；108- operating device；109- handle.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.

Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the range of the utility model protection.

It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" be based on the orientation or positional relationship shown in the drawings, or The utility model product using when the orientation or positional relationship usually put, be merely for convenience of description the utility model and letter Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and Operation, therefore should not be understood as limiting the present invention.In addition, term " first ", " second ", " third " etc. are only used for area Divide description, is not understood to indicate or imply relative importance.

In addition, the terms such as term "horizontal", "vertical" are not offered as requiring component abswolute level or pendency, but can be slightly Low dip.It is not to indicate that the structure has been had to if "horizontal" only refers to that its direction is more horizontal with respect to for "vertical" It is complete horizontal, but can be slightly tilted.

In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set Set ", " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, Or it is integrally connected；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, intermediary can also be passed through It is indirectly connected, can be the connection inside two elements.For the ordinary skill in the art, it can be managed with concrete condition Solve the concrete meaning of above-mentioned term in the present invention.

The utility model embodiment provides a kind of single-acting cylinder, including single-acting cylinder and single-action hydraulic cylinder, the two Only in piston rod 100 when protruding, the medium for generating thrust to piston rod 100 is different, as single-acting cylinder utilizes gas Body is as the medium for generating thrust, and single-action hydraulic cylinder is then using liquid 107 as the medium for generating thrust.Below with single-acting It is illustrated for hydraulic cylinder.Those skilled in the art should know the single-acting cylinder of the application is also same for single-acting cylinder Sample is applicable in.

Fig. 1 is please referred to, is one of the structural schematic diagram of single-acting cylinder of the utility model embodiment, including cylinder barrel 102, work Stopper rod 100, nut 101, screw rod 103, baffle 106 and rotating member 104.Piston rod 100 can be stretched relative to cylinder barrel 102 Contracting movement, is arranged in cylinder barrel 102.Nut 101 is set on piston rod 100, as shown in figure 4, implementing for the utility model The second structural representation of nut 101 in the single-acting cylinder of example which show nut 101 and is located at set on nut 101 Screw rod 103, the components such as locating part spring catch 105.Phase is respectively arranged in the inner circumferential of nut 101 and the periphery of piston rod 100 The internal screw thread and external screw thread mutually cooperated.As shown in figure 5, being provided with spiral shell on the side wall of nut 101 for the A-A cross-sectional view in Fig. 4 Pit, the screw rod 103 of corresponding threaded hole setting, screw rod 103 is radially disposed in threaded hole along nut 101, at the end of screw rod 103 Portion is provided with rotating member 104.Referring to Fig.1, piston rod 100 prepares the opposite stretching of cylinder barrel 102 at this time, sets in the side wall of cylinder barrel 102 It is equipped with baffle 106, screw rod 103 can mutually block when radially screwing in the threaded hole of nut 101 between the lower edge of baffle 106 It connects.Under the action of operating device 108, the liquid 107 in operating device 108 is entered the inner cavity of cylinder barrel 102 by pipeline, with liquid Body 107 continues into, and piston rod 100 is stretched out relative to cylinder barrel 102, and nut 101 is stretched out together with piston rod 100 at this time, This stretches out process when work for the single-acting hydraulic cylinder piston rod 100 upwards.

When piston rod 100 needs to decline the single-action hydraulic cylinder after the completion of work, as shown in Fig. 2, being this reality With the second structural representation of the single-acting cylinder of new embodiment, nut 101 is threaded to 100 bottom of piston rod first, by screw rod 103 screw in the direction of piston rod 100, the lower edge phase of the rotating member 104 and 102 side wall baffle 106 of cylinder barrel of 103 end of screw rod Clamping, screw rod 103 and cylinder barrel 102 are locking state at this time, are limited when nut 101 rotates in this way in the position of vertical direction Move, nut 101 can generate relative displacement between piston rod 100 during rotation, when nut 101 in rotation vertical direction Displacement be defined, then when rotating nut 101 nut 101 only around piston rod 100 carry out horizontal direction rotation, so, When nut 101 carries out the rotation of horizontal direction around piston rod 100, piston rod 100 passes through mutually matched internal and external threads phase Nut 101 is moved downward, so that nut 101 generates a kind of effect for forcing decline to piston rod 100, in screw rod 103 and gear 106 lower edge of plate clamping state can with 106 relative rolling of baffle, nut 101 rotate during avoid with baffle 106 it Between biggish frictional force.

It should be noted that first, in the utility model embodiment, the baffle 106 of 102 side wall of cylinder barrel, a side are set Face, needing to meet can make the side of baffle 106 and screw rod 103 mutually be clamped after screw rod 103 screws in, on the other hand, in phase Mutually on the basis of clamping, rotating member 104 is enabled to mutually to rotate on the another side of baffle 106.The baffle 106 is not limited to The concrete shape of example as shown in Figure 1 or 2, for example, it can be bar shaped etc., for baffle in the utility model embodiment 106 material and shape is not especially limited.

Second, the rotating member 104 of 103 end of screw rod is set, for the baffle on screw rod 103 and 102 side wall of cylinder barrel 106 mutually rotation when force of sliding friction changed into force of rolling friction, to reduce friction, therefore, rotating member 104 be not limited to as Shape shown in Fig. 1 or 2, as long as there is rolling surface can be realized rolling action, for example, it may be colyliform, can be It is spherical, moreover, material for rotating member 104 and other can realize that function is not especially limited, for example, rotating member 104 can To be bearing, idler wheel etc..

Further, screw rod 103 includes at least two and is uniformly arranged respectively by threaded hole in 101 side wall of nut.

It is exemplary, as shown in Fig. 2, there are two screw rods 103, two screw rods 103 to set respectively for setting on the side wall of nut 101 The opposite sides in nut 101 is set, enables to the locking state between nut 101 and cylinder barrel 102 stronger in this way, is being limited Nut 101 vertical direction displacement when, stress makes whole stress more stable to two screw rods 103 respectively, can make nut It is more smooth laborsaving when 101 rotation.

It is exemplary, as shown in Fig. 1 or 2, select bearing as rotating member 104, the inner ring of bearing is fixed at screw rod 103 end.

Select bearing as rotating member 104, when piston rod 100 needs to decline, screw rod 103 and baffle 106 at this time Lower edge be connected together, the bearing inner ring as previously described that 103 end of screw rod is arranged in is fixed on screw rod 103, Internal and external cycle It is linked together by ball, outer ring is contacted with baffle 106.When nut 101 rotates, it is located in 101 sidewall thread hole of nut Screw rod 103 and then rotate, drive and be fixed on the bearing of 103 end of screw rod and rotated, when rotation, the inner ring of bearing is fixed not Turn, outer ring is then as the rotation of nut 101 is rolled on 106 lower edge face of baffle.Bearing is selected, the structure of bearing is simple, jail Gu it is durable, for ease of maintenaince.

Optionally, as shown in Figure 1, finite place piece is arranged on screw rod 103, the depth of nut 101 is screwed in for limiting screw rod 103 Degree.

When setting finite place piece, when piston rod 100 is protruding relative to cylinder barrel 102, locating part can be fastened on screw rod On 103, stop screw rod 103 is screwed in, and avoiding screw rod 103 and may surprisingly screwing in leads to phase between rotating member 104 and baffle 106 A possibility that mutually stuck, improve the job stability of the single-acting cylinder of the utility model embodiment.

Exemplary, as shown in the figures 1 and 2, locating part can be spring catch 105, and screw rod 103 has been arranged radially through-hole, spring Pin 105 is inserted in through-hole.

It selects spring catch 105 as locating part, is then correspondingly arranged on through-hole with spring catch 105, the position of the through-hole can be with Play the screw-in depth that spring catch 105 limits screw rod 103, it is ensured that rotating member 104 and baffle 106 are mutually without restriction effect at this time. It is prevented outside the main function surprisingly occurred in the depth for playing limitation screw rod 103 and screwing in nut 101, spring catch 105 itself Also have the advantages that it is good elasticity and anti-shearing force, guarantee screw rod 103 on the durability of through-hole and spring catch 105 and reliably Property.

In another example being sheathed on screw rod 103 as shown in fig. 6, locating part can also be snap ring 1051.

Snap ring 1051 is selected to be used as locating part, referring to shown in Fig. 7, which is that a upper end closed lower end has opening And there is certain ductility at annular position.Its course of work is to work as to need rotating member 104 and baffle 106 mutually without restriction effect When, screw rod 103 is screwed out, using the ductility of snap ring 1051 and the opening of its lower end, snap ring 1051 is sheathed on screw rod 103 and is revolved Part out is met the requirements with limiting the depth of the screw-in nut 101 of screw rod 103.The snap ring 1051 makes simply, and structure is reliable.

Optionally, as shown in figure 4, being provided with handle 109 on 101 side wall of nut.Use the utility model embodiment Single-acting cylinder, when needing to carry out manual rotary operation to nut 101, gripping handle 109 enables to easy to operate.

It is exemplary, as shown in figure 3, for the utility model embodiment single-acting cylinder in nut 101 structural schematic diagram it One, there are two handles 109 for setting on nut 101, and are symmetrical arranged two handles 109.Handle 109 is being needed to drive nut 101 Also make rotation operation more stable when rotation, while more convenient laborsaving.

Preferably, as shown in the figures 1 and 2, mutual cooperation is respectively arranged in the inner circumferential of nut 101 and 100 periphery of piston rod Internal screw thread and external screw thread, and be trapezoidal thread, internal and external threads are adjacent to the conical surface, it is not easy to loosen, root of the tooth intensity is high, to neutrality It is good.

In the another aspect of the utility model, a kind of jack is provided, it includes the single-acting cylinders of any one of the above, also Including top plate, prypole, power cylinder, fuel tank, oil pipe, shut-off valve and check valve.

When jack needs to jack weight, checks that screw rod 103 is in and be limited part restriction state, driven by prypole Plug cock in power cylinder linearly moves, and when plug cock moves upwards, oil outlet one-way valve is closed, and in line check valve is opened, connection Oil in the oil inlet pipe of fuel tank enters power cylinder by line check valve, and when plug cock moves downward, in line check valve is closed, Oil outlet one-way valve is opened, and the oil into power cylinder enters hydraulic cylinder by the oil pipe being connected in hydraulic cylinder, pushes piston rod 100 Top plate is driven to jack weight upwards.When needing jack to set back, first shut-off valve is opened, by handle 109 by nut 101 are threaded to 100 bottom of piston rod, by screw rod 103 to the direction of piston rod 100 screw in, the rotating member 104 of 103 end of screw rod with The lower edge of 102 side wall baffle 106 of cylinder barrel is mutually clamped, and screw rod 103 and cylinder barrel 102 are locking state at this time, is limited in this way In the displacement of vertical direction when nut 101 rotates, nut 101 can generate opposite position between piston rod 100 during rotation Move, when the displacement of vertical direction is defined nut 101 in rotation, then when rotating nut 101 nut 101 only around piston rod 100 The rotation of horizontal direction is carried out, so, when nut 101 carries out the rotation of horizontal direction around piston rod 100, piston rod 100 are moved downward by mutually matched internal and external threads opposing nut 101, so that nut 101 generates one kind to piston rod 100 The effect of decline is forced, so that piston rod 100 in backhaul, due to there is the active force for forcing to decline, can be quickly returning to cylinder barrel In 102, or when jack breaks down, still can smoothly it return in cylinder barrel 102.

The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.

Claims (10)

1. a kind of single-acting cylinder, which is characterized in that the piston rod that stretches including cylinder barrel, relative to the cylinder barrel, be set in it is described Nut, screw rod on piston rod are arranged in the baffle of the cylinder barrel side wall and the rotating member of the screw rod end are arranged in；

Mutually matched internal screw thread and external screw thread, the spiral shell are respectively arranged in the inner circumferential of the nut and the piston rod periphery Female side wall is provided with threaded hole, and the screw rod is radially disposed in the threaded hole along the nut；The screw rod screws in and institute The clamping of baffle lower edge is stated, the rotating member can be with the baffle relative rolling.

2. single-acting cylinder according to claim 1, which is characterized in that the screw rod includes at least two, and at least two A screw rod passes through the threaded hole respectively and is uniformly arranged in the nut side wall.

3. single-acting cylinder according to claim 1, which is characterized in that the rotating member is bearing, the inner ring of the bearing It is fixed at the screw rod end.

4. single-acting cylinder according to claim 1-3, which is characterized in that finite place piece is set on the screw rod, The depth of the nut is screwed in for limiting the screw rod.

5. single-acting cylinder according to claim 4, which is characterized in that the locating part is spring catch, and the screw rod is radial It is provided with through-hole, the spring catch is inserted in the through-hole.

6. single-acting cylinder according to claim 4, which is characterized in that the locating part is snap ring, and the snap ring is sheathed on On the screw rod.

7. single-acting cylinder according to claim 1, which is characterized in that further include handle, the handle is fixed at institute State nut side wall.

8. single-acting cylinder according to claim 7, which is characterized in that the handle includes two, and two handles exist It is symmetrical arranged on the nut.

9. single-acting cylinder according to claim 1, which is characterized in that the internal screw thread and the external screw thread are trapezoidal spiral shell Line.

10. a kind of jack, which is characterized in that including single-acting cylinder as described in any one of claim 1 to 9.