CN201990432U - Hydraulic propelling jack and hydraulic support - Google Patents
Hydraulic propelling jack and hydraulic support Download PDFInfo
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- CN201990432U CN201990432U CN 201120076999 CN201120076999U CN201990432U CN 201990432 U CN201990432 U CN 201990432U CN 201120076999 CN201120076999 CN 201120076999 CN 201120076999 U CN201120076999 U CN 201120076999U CN 201990432 U CN201990432 U CN 201990432U
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- pin
- jack
- hydraulic pressure
- piston rod
- hole
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Abstract
The utility model discloses a hydraulic propelling jack and a hydraulic support. The hydraulic propelling jack comprises a cylinder and a piston rod, a pinhole is arranged at one end, away from the cylinder, of the piston rod, the generatrix of the inner side wall of the pinhole at least comprises an inwardly-protruding arc segment, and the minimum diameter of the pinhole is larger than the diameter of a pin shaft. By means of the hydraulic propelling jack and the hydraulic support, the connection mode of the pin shaft and the piston rod of the hydraulic propelling jack is improved, the service life of the hydraulic propelling jack can be prolonged, and production cost can be reduced.
Description
Technical field
The utility model relates to physical construction, relates in particular to a kind of hydraulic pressure and passes jack and hydraulic support.
Background technology
In the coal mining production process, in order to prevent roof collapse, keep certain working space, guarantee carrying out smoothly of workman's personal safety and every operation, must carry out supporting to top board, the supporting performance of hydraulic support is good, intensity height, advancing velocity are fast, safe, so often be used to top board is carried out supporting, hydraulic support is as power with highly pressurised liquid, by Hydraulic Elements and hard ware supporting of forming and the equipment of controlling top board, it can be realized supporting, cut the top, move a whole set of operations such as frame and moving conveyor in the back.
The frame that moves of hydraulic support uses hydraulic pressure to pass jack as propulsion source usually.The cylinder body end that hydraulic pressure is passed jack hangs on the base of hydraulic support, and piston rod links to each other with push rod, with the back and forth movement of the flexible drive push rod of piston rod.The type that hydraulic pressure is passed jack has a variety of, no matter it is installed on the hydraulic support in which way, piston rod is all identical with catenation principle between the push rod.Hydraulic support with a kind of form is an example below, describes in detail.Fig. 1 passes jack and push rod bonded assembly front view for hydraulic pressure, Fig. 2 is the birds-eye view of Fig. 1, be described in detail as follows in conjunction with Fig. 1～2: be connected by bearing pin 2 between the piston rod 1 that hydraulic pressure is passed jack 6 and the push rod 3, particularly, bearing pin 2 passes through two briquettings and is connected with push rod 3 with two small clevis pin with head 4.Common bearing pin 2 horizontal positioned, hydraulic pressure is passed 6 of jacks and is installed together horizontal by an angle α and push rod 3 in vertical plane, passes jack 6 during work and drives bearing pin 2 push-and-pull push rods 3 by flexible piston rod 1.
Fig. 3 is the stressed scheme drawing of piston rod in the prior art, and Fig. 4 is the C partial enlarged drawing of Fig. 3.Describe the stressing conditions of piston rod in the prior art in detail below in conjunction with Fig. 1～4.Hydraulic support is when underground work, and hydraulic pressure is passed jack 6 and is in the interior position horizontal by angle α of vertical plane all the time, but bearing pin 2 then can move and rotate in horizontal surface.Hydraulic pressure is passed jack 6 when stretching out piston rod 1 running, bearing pin 2 can rotate to an angle at the effect lower edge of power horizon, hydraulic pressure is passed the piston rod 1 of jack 6 and the area of contact of bearing pin 2 reduces, particularly, this moment, piston rod 1 contacted at contact point 5 places with bearing pin 2, as shown in Figure 4, hydraulic pressure is passed jack 6 and is applied along hydraulic pressure for bearing pin 2 to pass the axial thrust F of jack 6, the point of action of thrust F is a contact point 5, direction be perpendicular to bearing pin 2 axially, according to application force and antagonistic force principle, 2 pairs of piston rods 1 of bearing pin apply a reversing sense directed force F ', the direction of power F ' is the center by piston rod not also, but departs from contact point 5 places in piston rod one side, and piston rod is produced a moment of torsion.When piston rod 1 is regained, because identical principle also can produce moment of torsion.Moment of torsion is toward a side extrusion piston bar 1, and the time has been grown and caused piston rod 1 flexural deformation easily, and hydraulic pressure is passed the also simultaneously stressed generation distortion of cylinder mouth of jack 6.Because regular passes jack 6 toward side extruding hydraulic pressure; easily cause the sealing member loss of hydraulic pressure passing jack 6 too fast; the damage of sealing member will cause hydraulic pressure to pass jack 6 cisco unity malfunctions; and in borehole operation, the sealing member of changing hydraulic pressure passing jack 6 is very inconvenient, and actual situation is; in case sealing member damages; often need directly to change hydraulic pressure and pass jack 6, thereby prolong the floor time of maintenance of equipment, reduce the coal mining productive capacity.
There are the following problems at least in the prior art: the damage that the piston rod of existing hydraulic pressure passing jack and the connection mode of bearing pin are passed jack to hydraulic pressure is very big, and significantly shorten the service life that makes hydraulic pressure pass jack.
The utility model content
The utility model provides a kind of hydraulic pressure to pass jack and hydraulic support, passes the piston rod of jack and the connection mode of bearing pin in order to improve hydraulic pressure, improves the service life that hydraulic pressure is passed jack.
The utility model provides a kind of hydraulic pressure to pass jack, comprise cylinder body and piston rod, wherein: described piston rod has pin-and-hole away from an end of cylinder body, and the interior sidewall surface bus of described pin-and-hole comprises that at least the minimum diameter of described pin-and-hole is greater than the diameter of bearing pin to projecting inward circular arc line segment.
Aforesaid hydraulic pressure is passed jack, and preferably: described circular arc line segment is on the pin-and-hole length direction and is symmetrical arranged.
Aforesaid hydraulic pressure is passed jack, and preferably: described circular arc line segment both sides also comprise linear portion.
Aforesaid hydraulic pressure is passed jack, and preferably: described piston rod is an alloy steel.
The utility model also provides a kind of hydraulic support, wherein: comprise hydraulic pressure passing jack provided by the utility model.
The hydraulic pressure that the utility model provides is passed jack and hydraulic support, its hydraulic pressure is passed jack has pin-and-hole away from cylinder body one end, the interior sidewall surface bus of this pin-and-hole comprises at least to projecting inward circular arc line segment, and, the minimum diameter of this pin-and-hole is greater than the diameter of bearing pin, bearing pin and matching relationship between pin-and-hole no longer are bearing pins and the cooperating of straight hole, but the cooperating of bearing pin and arc surface, the contact point of bearing pin and pin-and-hole is also on the circular arc line segment, in the use, bearing pin has certain rotation and moves, and still, the rotation of bearing pin is along arc surface, the bearing pin after the rotation and the contact point of pin-and-hole are still on arc surface, bearing pin is passed to piston rod along contact point for the application force of pin-and-hole, and the direction of this application force is almost along the direction of piston rod line of centers, and the moment of torsion that piston rod is produced is in the carrying scope of piston rod.The hydraulic pressure that the utility model provides is passed jack and hydraulic support, has improved hydraulic pressure and has passed the piston rod of jack and the connection mode of bearing pin, can improve the service life that hydraulic pressure is passed jack, reduces production costs.
Description of drawings
Fig. 1 is that hydraulic pressure is passed jack and push rod bonded assembly front view in the prior art.
Fig. 2 is that hydraulic pressure is passed jack and push rod bonded assembly birds-eye view in the prior art.
Fig. 3 is the stressed scheme drawing that hydraulic pressure is passed jack piston rod in the prior art.
Fig. 4 is that hydraulic pressure is passed the stressed partial enlarged drawing of jack piston rod in the prior art.
Fig. 5 passes the pin-and-hole of jack and being connected and stressed scheme drawing of bearing pin for the hydraulic pressure that the utility model embodiment one provides.
The hydraulic pressure that Fig. 6 provides for the utility model embodiment three is passed the pin-and-hole and the stressed partial enlarged drawing of bearing pin of jack.
Fig. 7 passes the pin-and-hole of jack and the connection diagram of bearing pin for the hydraulic pressure that the utility model embodiment two provides.
Hydraulic pressure is passed the pin-and-hole of jack and the contact stress analysis chart of bearing pin on the hydraulic support that Fig. 8 provides for the utility model embodiment three.
Reference numeral:
The 1-piston rod; The 2-bearing pin;
The 3-push rod; The 4-small clevis pin with head;
The 5-contact point; 6-hydraulic pressure is passed jack;
The 7-pin-and-hole; 8-circular arc line segment;
The 9-linear portion.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in the utility model, technical scheme in the utility model is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one
Fig. 5 passes the pin-and-hole of jack and being connected and stressed scheme drawing of bearing pin for the hydraulic pressure that the utility model embodiment one provides, and Fig. 6 is the D partial enlarged drawing of Fig. 5.Be elaborated in conjunction with Fig. 5-6 pair present embodiment.The utility model embodiment provides a kind of hydraulic pressure to pass jack, comprise cylinder body and piston rod 1, wherein: piston rod has pin-and-hole 7 away from an end of cylinder body, and the interior sidewall surface bus of pin-and-hole 7 comprises that at least the minimum diameter of pin-and-hole 7 is greater than the diameter of bearing pin 2 to projecting inward circular arc line segment 8.The M point is the contact point of off working state bearing pin 2 and pin-and-hole 7, and the N point is the contact point of mode of operation bearing pin 2 and pin-and-hole 7.
Bearing pin and pin-and-hole annexation with the ZZ6400/18/38 standing shield hydraulic support are that example describes, but be not limited to this, as shown in Figure 6, during mode of operation, F is the application force that pin-and-hole 7 imposes on bearing pin 2, F ' is the antagonistic force of F, and the radius of pin-and-hole 7 circular arc line segments 8 is R, bearing pin 2 under the strong combined action, the distance of mobile L, the angle of rotating is θ, and at this moment, bearing pin 2 moves to the N point with the contact point of pin-and-hole 7 by the M point, the distance of parallel motion is k, the angle of rotating is θ, and the bearing pin miles of relative movement L of ZZ6400/18/38 standing shield hydraulic support is in ± 11mm scope, and the angle θ of rotation is in ± 1 ° of scope, when the distance L that moves when bearing pin reaches capacity 11mm, the distance of k is still less than 1mm, that is, the N point is almost by piston rod 1 center.In the hydraulic support of other models, hydraulic pressure is passed between jack and the horizontal surface and is not necessarily had angle, the scope that bearing pin moves and rotational angle be different because of the hydraulic support model also, but the catenation principle between piston rod and the push rod is identical, so the hydraulic pressure that the utility model embodiment is equally applicable on the hydraulic support of other models is passed jack.
The hydraulic pressure that the utility model embodiment provides is passed jack, away from cylinder body one end pin-and-hole is arranged, the interior sidewall surface bus of this pin-and-hole comprises inwardly outstanding circular arc line segment at least, and, the minimum diameter of this pin-and-hole is greater than the diameter of bearing pin, concrete numerical value is set according to the diameter and the departure distance of bonded assembly bearing pin on the different model hydraulic support jack, bearing pin and matching relationship between pin-and-hole no longer are bearing pins and the cooperating of straight hole, but the cooperating of bearing pin and arc surface, the contact point of bearing pin and pin-and-hole is on arc surface, in the use, bearing pin has certain rotation and moves, but, the rotation of bearing pin is along arc surface, and still on arc surface, bearing pin is passed to piston rod along contact point for the application force of pin-and-hole for the bearing pin after the rotation and the contact point of pin-and-hole, the direction of this application force is almost along the direction of piston rod line of centers, and the moment of torsion that piston rod is produced is in the carrying scope of piston rod.The hydraulic pressure that the utility model embodiment provides is passed jack, has improved hydraulic pressure and has passed the piston rod of jack and the connection mode of bearing pin, can significantly improve the service life that hydraulic pressure is passed jack, reduces production costs.
On the technique scheme basis, preferably, the circular arc line segment of pin-and-hole is on the pin-and-hole length direction and is symmetrical arranged on the piston rod, to simplify the processing technology of pin-and-hole.
Embodiment two
Fig. 7 passes the pin-and-hole of jack and the connection diagram of bearing pin for the hydraulic pressure that the utility model embodiment two provides.Present embodiment is on the technical scheme basis of the foregoing description, and as shown in Figure 7, further, circular arc line segment 8 both sides of piston rod 1 pin-and-hole 7 also comprise linear portion 9.In the actual process, pin-and-hole 7 to projecting inward circular arc processing technology complexity, pin-and-hole 7 and the contact point of bearing pin 2 mainly concentrate on the center of circular arc line segment 8, therefore, in the both sides of circular arc line segment 8, can be processed as linear portion 9, can not influence the connection structure of pin-and-hole 7 and bearing pin 2.
As preferred embodiment of the present utility model, the piston rod that hydraulic pressure is passed jack is an alloy steel, and alloy steel hardness is good, and is wear-resisting, for the abrasion resistance of pin-and-hole further is provided, can also carry out Quenching Treatment to pin-and-hole.
Embodiment three
The utility model embodiment also provides a kind of hydraulic support, wherein, comprises the hydraulic pressure passing jack that the utility model any embodiment provides.Bearing pin and pin-and-hole contact position can produce contact stress, below the hydraulic pressure on the hydraulic support is passed jack and carries out strength check, the contact stress analysis of bearing pin and pin-and-hole as shown in Figure 8, F is the application force that pin-and-hole imposes on bearing pin, F ' is the antagonistic force of F.
Present embodiment is that example describes with pin-and-hole and the bigger ZZ6400/18/38 standing shield hydraulic support of bearing pin interaction force, but be not limited in this, known bearing pin material is 30CrMnTi, the piston rod material is 27SiMn, the rated thrust, nominal thrust of passing jack is 713KN, specified pulling force 396KN, pin diameter are 60mm.
When radius is two curved face objects of R1, R2 when being in contact with one another, under the effect of pressure F, form an oval area of contact, get by the mechanics of elasticity hertz formula:
In the formula: E
1, E
2---be the modulus of elasticity of two ball material;
μ
1, μ
2---be the Poisson's ratio of two ball material.
Getting composite curve radius is R, then:
According to the material of pin-and-hole and bearing pin, obtain separately modulus of elasticity and Poisson's ratio:
E
1=E
2=E=206, μ
1=μ
2=μ=0.3, then contact stress:
In the hydraulic support that present embodiment provides, pin-and-hole can be regarded spheroid and plane contact, i.e. R as with contacting of bearing pin
2=∞, then R=R
1=35mm gets F
Max=713KN, the bearing pin material is 30CrMnTi, its permissible stress [σ] is 130MPa
The substitution following formula calculates: σ
Hmax=113MPa≤[σ]
That is, the maximum contact stress of bearing pin and pin-and-hole contact position is less than its permissible stress, so the hydraulic support that the utility model embodiment provides can normally use.
The hydraulic support that present embodiment provides, because the hydraulic pressure that has used the utility model any embodiment to provide is passed jack, the connection mode of pin-and-hole and bearing pin is improved, the moment of torsion that piston rod is subjected to reduces greatly, avoided being consumed phenomenons such as too fast because piston rod flexural deformation, cylinder mouth stress deformation, the sealing member of the passing jack of the excessive generation of moment of torsion damage due to crushing, prolonged the service life of passing jack, reduced and changed the cost that hydraulic pressure is passed jack.
It should be noted that at last: above embodiment only in order to the explanation the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (5)
1. a hydraulic pressure is passed jack, comprise cylinder body and piston rod, it is characterized in that: described piston rod has pin-and-hole away from an end of described cylinder body, and the interior sidewall surface bus of described pin-and-hole comprises that at least the minimum diameter of described pin-and-hole is greater than the diameter of bearing pin to projecting inward circular arc line segment.
2. hydraulic pressure according to claim 1 is passed jack, it is characterized in that: described circular arc line segment is on the pin-and-hole length direction and is symmetrical arranged.
3. hydraulic pressure according to claim 1 and 2 is passed jack, and it is characterized in that: described circular arc line segment both sides also comprise linear portion.
4. hydraulic pressure according to claim 1 and 2 is passed jack, and it is characterized in that: described piston rod is an alloy steel.
5. a hydraulic support is characterized in that: comprise the arbitrary described hydraulic pressure passing jack of claim 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120076999 CN201990432U (en) | 2011-03-22 | 2011-03-22 | Hydraulic propelling jack and hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120076999 CN201990432U (en) | 2011-03-22 | 2011-03-22 | Hydraulic propelling jack and hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201990432U true CN201990432U (en) | 2011-09-28 |
Family
ID=44666926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120076999 Expired - Fee Related CN201990432U (en) | 2011-03-22 | 2011-03-22 | Hydraulic propelling jack and hydraulic support |
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| Country | Link |
|---|---|
| CN (1) | CN201990432U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102689850A (en) * | 2011-03-22 | 2012-09-26 | 淮南郑煤机舜立机械有限公司 | Hydraulic push jack and hydraulic support |
| CN103104278A (en) * | 2012-12-10 | 2013-05-15 | 辽宁鑫丰矿电设备制造有限公司 | Hydraulic support entrucking device |
| CN104259792A (en) * | 2014-10-20 | 2015-01-07 | 郑州煤矿机械集团股份有限公司 | Manufacturing method for hydraulic support pin roll seat |
| CN109231064A (en) * | 2018-10-23 | 2019-01-18 | 哈尔滨理工大学 | A kind of hydraulic support device that tiltable uses |
-
2011
- 2011-03-22 CN CN 201120076999 patent/CN201990432U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102689850A (en) * | 2011-03-22 | 2012-09-26 | 淮南郑煤机舜立机械有限公司 | Hydraulic push jack and hydraulic support |
| CN102689850B (en) * | 2011-03-22 | 2015-02-04 | 淮南郑煤机舜立机械有限公司 | Hydraulic push jack and hydraulic support |
| CN103104278A (en) * | 2012-12-10 | 2013-05-15 | 辽宁鑫丰矿电设备制造有限公司 | Hydraulic support entrucking device |
| CN103104278B (en) * | 2012-12-10 | 2014-12-10 | 辽宁鑫丰矿电设备制造有限公司 | Hydraulic support entrucking device |
| CN104259792A (en) * | 2014-10-20 | 2015-01-07 | 郑州煤矿机械集团股份有限公司 | Manufacturing method for hydraulic support pin roll seat |
| CN109231064A (en) * | 2018-10-23 | 2019-01-18 | 哈尔滨理工大学 | A kind of hydraulic support device that tiltable uses |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20150322 |
|
| EXPY | Termination of patent right or utility model |