CN1053595A - Jack - Google Patents
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- CN1053595A CN1053595A CN 90100164 CN90100164A CN1053595A CN 1053595 A CN1053595 A CN 1053595A CN 90100164 CN90100164 CN 90100164 CN 90100164 A CN90100164 A CN 90100164A CN 1053595 A CN1053595 A CN 1053595A
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- wedge
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- jack
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Abstract
Jack comprises U-shaped base (1), and T shape piece (2) wherein is installed.The pillar (3) of T shape piece (2) is formed chamber (5) with the end (4) of U-shaped base (1), and an elastic cab (6) that is connected with the working medium source is set in this chamber at least.Between the outside face (8) of the end face (7) of the pillar (3) of T shape piece (2) and elastic cab (6), place a wedge-shaped element (9) at least.
Description
The invention belongs to mechanical manufacturing field, promptly belong to hoisting and transport equipment, relate to jack or rather.
The present invention can be successfully used to Installation And Calibration various device or structure in dismounting or the repairing work process in assembling.
Known a kind of jack (Russian Patent, A, 495271), it comprises a U-shaped base, and a T shape piece is installed thereon.A chamber is formed at the pillar of T shape piece and the end of U-shaped base, is placing an elastic cab in the chamber at least, and cell is connected with the working medium source.Base is connected with elastic element each other with T shape piece, and elastic element is a spring in this patent.Elastic cab is in a zigzag along the perpendicular line direction lays, and can flow through at elastic cab's knee working medium in order to guarantee, several fine rules are housed in elastic cab.When working medium flowed into elastic cab, elastic cab's volume increased.When volume increased, elastic cab was pressed on the T shape piece, and when elastic cab overcame the elastic force of spring to the application force of T shape piece, T shape piece promptly produced displacement.But, when working medium is admitted to elastic cab under high pressure (pressure surpasses 100MPa), elastic cab can be squeezed into that And is stuck in the there in the gap between the inner surface of the side surface of T shape piece pillar and U-shaped base, thereby adds the wearing and tearing of having brushed the surface that contacts with the above-mentioned surface of T shape piece with base.The wearing and tearing of elastic cab may make its fracture, thereby the jack et out of order.Reduce gap between T shape piece pillar side surface and the U-shaped base inner surface by improving above-mentioned surperficial machining accuracy, thereby avoid all effort of above-mentioned phenomenon all not prove effective.
Basic mission of the present invention is to build a kind of jack, and its version can allow to improve the reliability of jack and the maintenance time that need not to repair thereof by the way that improves elastic cab's work life.
This task is to solve like this, jack comprises a U-shaped base, a T shape piece is installed on it, a chamber is formed at the pillar of T shape piece and the end of U-shaped base, according to the present invention, disposes an elastic cab at least in this chamber, elastic cab is connected with the working medium source, at least be provided with a wedge-shaped element between T shape piece end face and elastic cab's outside face, it contacts ， And and elastic cab's mutual action with the end face of T shape piece pillar and the inner surface of U-shaped base.
Jack has various embodiment.The pattern difference of various jack T shape piece pillar, the shape of wedge-shaped element and quantity difference thereof; Some jack has angle bar shape element and pulverous extending agent.In one of multiple embodiments of the jack that has a wedge-shaped element, the end face of T shape piece pillar makes bevelled ， And and contacts with " work " surface of wedge-shaped element.
When working medium input flexibility cell, elastic cab's volume increases.When volume increased, elastic cab was pressed on the wedge-shaped element, and wedge-shaped element is pressed on the pillar of T shape piece.When elastic cab act on the wedge-shaped element make every effort to overcome the elastic force of clothes spring the time, wedge-shaped element and the T shape piece that contact with it are just mobile.The wedge of wedge-shaped element is pressed to an inner surface of U-shaped base with it.This wedge of wedge-shaped element is also pressed to the pillar of T shape piece another inner surface of U-shaped base.The pressure that is noted that working medium input flexibility cell is high more, and then to press to the power on U-shaped base respective inside surface big more for wedge-shaped element and T shape piece pillar.The effect of thrust makes the gap between T shape piece pillar and inner surface of U-shaped base, and the gap between wedge-shaped element and another inner surface of U-shaped base reduces.Thrust is big more, and then above-mentioned gap is more little.Thereby the pressure of working medium input flexibility cell is high more, and then above-mentioned gap is more little.Like this, reduce the gap and just reduced elastic cab and clamp-on possibility in the gap, its result then is the degree of wear that has reduced elastic cab, increased the work-hours that jack need not to repair.But in such scheme, elastic cab may be stuck in the gap between the edge of the wedge-shaped element that inner surface of U-shaped base contacts with discord U-shaped base.
In another scheme, between the end of the end face of T shape piece pillar and U-shaped base, in the formed chamber two wedge-shaped elements are installed, " work " surface of each wedge-shaped element all contacts with the outside face of elastic cab.
This structure of jack can reduce elastic cab and clamp-on and block probability in the gap between wedge-shaped element and U-shaped base inner surface, because at this moment only pressing a wedge-shaped element on each inner surface of U-shaped base.But in the jack of this structure, elastic cab may clamp-on and block between the adjacent edge of wedge-shaped element.
Generally wish in jack, to be provided with an angle bar shape element with two wedge-shaped elements, this element is placed on And between wedge-shaped element and the elastic cab and contacts with " work " surface of its outside face and wedge-shaped element, and contacts with the outside face of elastic cab with its inside face.This structural shape of jack has been got rid of elastic cab and has been clamp-oned and blocked possibility between the wedge-shaped element neighboring edge.
Hope is in the jack with a wedge-shaped element, the wedge-shaped element surface that contacts with elastic cab makes curvilinear figure, its center of curvature is approximate to be overlapped with the center of curvature of elastic cab outside face, and its radius of curvature then is approximately equal to the radius of curvature of elastic cab's outside face.
Equally also wish in jack with two wedge-shaped elements, the part of the wedge-shaped element that contacts with elastic cab " work " surface makes curvilinear figure, their center of curvature is approximate to be overlapped with the center of curvature of elastic cab outside face, and their radius of curvature is approximately equal to the radius of curvature of elastic cab's outside face.
When in these jacks, being provided with an angle bar shape element, then a part of inside face of this angle bar shape element also should make curvilinear figure, the center of curvature of inside face is approximate to be overlapped with the center of curvature of elastic cab outside face, and the radius of curvature of inside face is approximately equal to the radius of curvature of elastic cab's outside face.
This structural shape on the above-mentioned surface of wedge-shaped element can make the distortion minimum of elastic cab's outside face, and this just can improve the work life of elastic cab.
Be preferably in the jack with two wedge-shaped elements, Powdered extending agent is put into the chamber of being limited by elastic cab's part outside face and a wedge-shaped element part " work " surface, also put into each chamber in two chambeies of being limited simultaneously by the other a part of outside face of elastic cab, wedge-shaped element in addition a part of " work " surface and U-shaped pedestal part.
Be preferably in equally and also Powdered extending agent put into the chamber of being limited in the jack with two wedge-shaped elements and an angle bar shape element by elastic cab part outside face and angle bar shape element part inside face, and in each chamber in two chambeies of limiting by the bottom of another part inside face of another part outside face of elastic cab, angle bar shape element and U-shaped base.
Powdered extending agent is full of whole above-mentioned gaps, has so got rid of elastic cab fully and has clamp-oned and block possibility in the gap.In addition, the existence of Powdered extending agent also helps the distortion that reduces elastic cab's outside face, and this also can improve its work life.
The structure ， And that below will elaborate the jack that makes according to the present invention quotes accompanying drawing, and the present invention will be described, wherein:
Fig. 1 represents the cross-sectional plane of the jack of making according to the present invention;
Fig. 2 also is a cross-sectional plane for another embodiment of the jack of making according to the present invention;
Fig. 3 also is a cross-sectional plane for another embodiment of the jack of making according to the present invention;
Fig. 4 is another embodiment of the jack of making according to the present invention, the still cross-sectional plane of expression;
Fig. 5 another embodiment of jack for making according to the present invention is still the expression cross-sectional plane;
Fig. 6 another embodiment of jack for making according to the present invention also is the expression cross-sectional plane;
Fig. 7 another embodiment of jack for making according to the present invention is still represented cross-sectional plane.
Hoisting capacity contains a U-shaped base 1(Fig. 1 at the jack below 120 tons), wherein laying a T shape piece 2.The pillar 3 of T shape piece 2 is formed chamber 5 with the end of U-shaped base 14.At least disposing an elastic cab in chamber 5, is an elastic cab 6 in this programme.Elastic cab 6 is not connected with working medium source (illustrating among the figure), in this programme for to be connected with the Hydraulic Station of fuel feeding.Between the outside face 8 of the end face 7 of the pillar 3 of T shape piece 2 and elastic cab 6 wedge-shaped element being set at least, is a wedge-shaped element 9 in this programme.U-shaped base 1 has two medial surface 10a, 10b.The end face 7 of the pillar 3 of wedge-shaped element 9 and T shape piece 2, medial surface 10b contact ， And and elastic cab's 6 mutual actions of U-shaped base 1.The end face 7 of the pillar 3 of T shape piece 2 makes bevelled ， And and contacts with " work " surface 11 of wedge-shaped element 9.In order to make base 1 and T shape piece 2 return back to the initial position, they connect with elastic element 12,13 each other, and elastic element is spring in this programme.
In order to improve the hoisting capacity of jack, generally all several elastic cab to be set.For example, hoisting capacity includes a U-shaped base 14(Fig. 2 at the jack below 250 tons).A T shape piece 15 is installed in U-shaped base 14.The pillar 16 of T shape piece 15 is formed chamber 18 with the end of U-shaped base 14 17, is placing two elastic cab 19,20 in this chamber, and each elastic cab all is not connected with working medium source (illustrating among the figure).Between outside face 22a, the 22b of the end face 21 of the pillar 16 of T shape piece 15 and elastic cab 19,20, laying wedge-shaped element 23.U-shaped base 14 has medial surface 24a, 24b.Wedge-shaped element 23 contacts ， And and elastic cab's 19,20 mutual actions with the end face 21 of the pillar 16 of T shape piece 15, the medial surface 24b of U-shaped base 14.The end face 21 of the pillar 16 of T shape piece 15 makes bevelled, And and contacts with " work " surface 25 of wedge-shaped element 23.In order to make base 14 and piece 15 reply the initial position, they connect mutually with elastic element 26,27.
In order to reduce the distortion of elastic cab's outside face, thereby improve the work life of elastic cab, usually the surface of the wedge-shaped element that contacts with elastic cab to be made curvilinear figure, this surperficial center of curvature should dispose to such an extent that it approximate is overlapped with the center of curvature of elastic cab outside face, and its radius of curvature is approximately equal to the radius of curvature of elastic cab's outside face.For example, hoisting capacity includes a U-shaped base 28(Fig. 3 at the jack below 120 tons).A T shape piece 29 is installed in U-shaped base 28.The pillar 30 of T shape piece 29 is formed chamber 32 with the end 31 of U-shaped base 28, disposes elastic cab 33 in this chamber, and it is not connected with working medium source (illustrating among the figure).Between the end face 34 of the pillar 30 of T shape piece 29 and the outside face 35 of elastic cab 33 wedge-shaped element 36 is set.U-shaped base 28 has inner surface 37a, 37b, and wedge-shaped element 36 contacts ， And and elastic cab's 33 mutual actions with the end face 34 of the pillar 30 of T shape piece 29, the medial surface 37b of U-shaped base 28.The end face 34 of the pillar 30 of T shape piece 29 makes bevelled ， And and contacts with " work " surface 38 of wedge-shaped element 36.The surface 39 of the wedge-shaped element 36 that contacts with elastic cab 33 makes curvilinear figure.The center of curvature O on the surface 39 of the wedge-shaped element 36 that contacts with elastic cab 33
1The center of curvature O of the outside face 35 of approximate and elastic cab 33
2Overlap, and the radius of curvature R on the surface 39 of wedge-shaped element 36
1Be approximately equal to the radius of curvature R of the outside face 35 of elastic cab 33
2Base 28 connects with piece 29 usefulness elastic elements 40,41.
In order to reduce the probability that goes in the gap between inner surface that elastic cab clamp-ons the U-shaped base contacts wedge-shaped element with this inner surface of discord the edge, usually jack also is equipped with a wedge-shaped element, these wedge-shaped elements should dispose like this, make their " work " surface and elastic cab's outside face mutual action.For example, hoisting capacity includes a U-shaped base 42(Fig. 4 at the jack below 150 tons), a T shape piece 43 wherein is installed.The pillar 44 of T shape piece 43 is formed chamber 46 with the end of U-shaped base 42 45, places elastic cab 47 in this chamber, and it is not connected with working medium source (illustrating among the figure).Be placed with two wedge-shaped elements 50,51 between the outside face 49 of the end face 48 of the pillar 44 of T shape piece 43 and elastic cab 47, they contact ， And and elastic cab's 47 mutual actions with the end face 48 of the pillar 44 of T shape piece 43, the medial surface 52,53 of U-shaped base 42." work " of wedge-shaped element 50,51 surface 54,55 contacts with the outside face 49 of elastic cab 47.Base 42 connects with piece 43 usefulness elastic elements 56,57.In 54,55 chambeies of being limited 58, a part " work " surface by a part of outside face 49 of elastic cab 47 and wedge-shaped element 50,51, and by another part outside face 49 of elastic cab 47, adding Powdered extending agent in the chamber 59,60 that another part " work " surface 54,55 of wedge-shaped element 50,51 and the end 45 of U-shaped base 42 are limited, is graphite powder in this programme.
In order to prevent that elastic cab from clamp-oning and blocking between the neighboring edge of wedge-shaped element, an angle bar shape element is set usually in jack.For example, hoisting capacity includes a U-shaped base 61(Fig. 5 at the jack below 150 tons), a T shape piece 62 wherein is installed.The pillar 63 of T shape piece 62 is formed chamber 65 with the end of U-shaped base 61 64, is placing an elastic cab 66 that is connected with working medium source (not illustrating among the figure) in this chamber.Placing two wedge-shaped elements 69,70 between the outside face 68 of the end face 67 of the pillar 63 of T shape piece 62 and elastic cab 66, they contact ， And and elastic cab's 66 mutual actions with the end face 67 of the pillar 63 of T shape piece 62, the medial surface 71,72 of U-shaped base 61.Angle bar shape element 73 above-mentioned is placed between wedge-shaped element 69,70 and the elastic cab 66 And and contacts with " work " surface 76,77 of wedge-shaped element 69,70 with its outside face 74,75, and contacts with the outside face 68 of elastic cab 66 with its inside face 78,79.In a part of inside face 78,79 chambeies of being limited 80, and put into Powdered extending agent-graphite powder in the chamber 81,82 of being limited by the end 64 of another part inside face 78,79 of another part outside face 68 of elastic cab 66, angle bar shape element 73 and U-shaped base 61 by a part of outside face 68 of elastic cab 66 and angle bar shape element 73.Base 61 and piece 62 usefulness elastic elements 83,84 connect.
In order to reduce the distortion of elastic cab in the jack with two wedge-shaped elements, the part surface of the wedge-shaped element that contacts with elastic cab makes curvilinear figure, for example, hoisting capacity includes a U-shaped base 85(Fig. 6 at the jack below 150 tons), T shape piece 86 wherein is installed, the pillar 87 of T shape piece is formed chamber 89 with the end of U-shaped base 85 88, is placing elastic cab 90 in this chamber.Elastic cab 90 is not connected with working medium source (illustrating among the figure).Between the outside face 92 of the end face 91 of the pillar 87 of T shape piece 86 and elastic cab 90, be provided with two wedge-shaped elements 93,94.The end face 91 of wedge-shaped element 93,94 and pillar 87, medial surface 95,96 contact ， And and elastic cab's 90 mutual actions of U-shaped base 85." work " of wedge-shaped element 93,94 surface 97,98 contacts with the outside face 92 of elastic cab 90.Part " work " surface 97,98 that contacts to wedge-shaped element 93,94 with elastic cab 90 makes curvilinear figure.The center of curvature O on " work " surface 97,98 of wedge-shaped element 93,94
3, O
4The center of curvature O of the outside face 92 of approximate and elastic cab 90
5Overlap.The radius of curvature R on " work " surface 97,98 of wedge-shaped element 93,94
3, R
4Be approximately equal to the radius of curvature R of the outside face 92 of elastic cab 90
5At the end 88, put into extending agent-graphite powder in the chamber 99,100 that a part of outside face 92 of the part " work " of wedge-shaped element 93,94 surface 97,98 and elastic cab 90 is limited by U-shaped base 85.Base 85 connects with piece 86 usefulness elastic elements 101,102.
For same purpose, in the jack with two wedge-shaped elements and an angle bar shape element, the part inside face of angle bar shape element makes curvilinear figure.For example, hoisting capacity comprises a U-shaped base 103(Fig. 7 at the jack below 150 tons), a T shape piece 104 wherein is installed.The pillar 105 of T shape piece 104 is formed chamber 107 with the end of U-shaped base 103 106, is laying elastic cab 108 in chamber 107, and it is not connected with working medium source (illustrating among the figure).Between the outside face 110 of the end face 109 of the pillar 105 of T shape piece 104 and elastic cab 108, placing wedge-shaped element 111,112, the end face 109 of the pillar 105 of they and T shape piece 104, medial surface 113,114 contact ， And and elastic cab's 108 mutual actions of U-shaped base 103.Be provided with angle bar shape element 115 in this jack, it is placed between wedge-shaped element 111,112 and the elastic cab 108.Angle bar shape element contacts with " work " surface 118,119 of wedge-shaped element 111,112 with its outside face 116,117, and contacts with the outside face 110 of elastic cab 108 with its inside face 120,121.The part inside face 120,121 of angle bar shape element 115 makes curvilinear figure, their center of curvature O
6, O
7The center of curvature O of the outside face 110 of approximate and elastic cab 108
8Overlap their radius of curvature R
6, R
7Be approximately equal to the radius of curvature R of the outside face 110 of elastic cab 108
8In the chamber 122,123 of being limited, put into pulverous extending agent-graphite powder by the end 106 of a part of inside face 120,121 of the part outside face 110 of elastic cab 108, angle bar shape element 115 and U-shaped base 103.Base 103 connects with piece 104 usefulness elastic elements 124,125.
Hoisting capacity shown in Figure 1 at the jack below 120 tons by following mode work.Jack is placed the initial position, U-shaped base 1 can be placed on the area supported for this reason, and T shape piece 2 is placed in below the motion structure.Utilize hydraulic power unit with in the oily input flexibility cell 6 then.When volume increased, elastic cab 6 was pressed on the wedge-shaped element 9, and wedge-shaped element 9 is pressed on the T shape piece 2, and 2 effects of T shape piece structurally.Surpass when this structure remained on the power in initial position when T shape piece 2 acts on structural power, structure is with regard to setting in motion.At this moment, because the wedge of wedge-shaped element 9, the pillar 3 of T shape piece 2 is pressed to the inner surface 10a of U-shaped base 1, and wedge-shaped element 9 itself is then pressed to another inner surface 10b of U-shaped base 1.Because wedge-shaped element 9 is pressed to the medial surface 10b of U-shaped base 1, so the gap between them reduces, thereby elastic cab 6 blocks in the gap with the worn-down probability and also reduces.The pillar 3 of T shape piece 2 also is the same with gap between the inner surface 10a of U-shaped base 1.When structure reaches desired position, Jie structure Gu is Dinged And unload jack.For this reason, should cut off to the fuel feeding ， of elastic cab 6 And and utilize the elastic force of spring 12,13 that base 1 and piece 2 are returned back to the initial position.
The work of Fig. 2, jack shown in Figure 3 and jack shown in Figure 1 are similar.
Shown in Figure 4, the jack with two wedge-shaped elements is worked by following mode.Jack is adjusted to the initial position.Fuel feeding in elastic cab 47 then.When volume increased, elastic cab 47 was pressed on the wedge-shaped element 50,51, and wedge-shaped element remakes and is used on the T shape piece 43.Because the wedge of wedge-shaped element 50,51, they are pressed towards on the inner surface 52,53 of U-shaped base 42.Because like this, the gap between gap between wedge-shaped element 50 and the inner surface 52 and wedge-shaped element 51 and the inner surface 53 reduces, and reduces thereby elastic cab clamp-ons the probability in these gaps.At this moment, between the neighboring edge of wedge-shaped element 50,51, can form the gap.The gapped graphite powder that all is placed in the chamber 58,59,60 fill up.Because the gap is filled up by graphite powder, so elastic cab 47 can not clamp-on, block in the gap.
The work of jack shown in Figure 6 and the operation class of jack shown in Figure 4 are seemingly.
Fig. 5 and shown in Figure 7, operation class with the work of jack of angle bar shape element and jack shown in Figure 4 seemingly, have only some difference, be that elastic cab 66 clamp-ons and blocks in the gap between the neighboring edge of wedge-shaped element 69,70, and the danger that elastic cab 108 clamp-ons and blocks in the gap between the neighboring edge of wedge-shaped element 111,112 rely on installing angle bar shape element 73,115 to get rid of.
Only aborning use condition of the present invention known to the author is as follows.
Be recommended in the jack, T shape piece and wedge-shaped element are with different material manufacture.For example, T shape piece is made with steel, and wedge-shaped element is made with bronze.If jack is equipped with angle bar shape element, suggestion angle bar shape element is made with steel.
Claims (9)
1, a kind of jack, it comprises a U-shaped base (1,14,28,42,61,85,103), a T shape piece (2 is installed therein, 15,29,43,62,86,104), its pillar (3,16,30,44,63,87,105) with U-shaped base (1,14,28,42,61,85,103) the end (4,17,31,45,64,88,106) form a chamber (5,18,32,46,65,89,107), in this chamber, placing an elastic cab (6 that is connected with the working medium source at least, 19,20,33,47,66,90,108), it is characterized by: at T shape piece (2,15,29,43,62,86,104) pillar (3,16,30,44,63,87,105) end face (7,21,34,48,67,91,109) with elastic cab (6,19,33,47,66,90,108) outside face (8,22a, 22b, 35,49,68,92,110) dispose a wedge-shaped element (9 between at least, 23,36,50,51,69,70,93,94,111,112), it and T shape piece (2,15,29,43,62,86,104) pillar (3,16,30,44,63,81,105) end face (7,21,34,48,67,91,109), U-shaped base (1,14,28,42,61,85,103) inner surface (10b, 24b, 37b, 52,53,71,72,95,96,113,114) contact ， And and elastic cab (6,19,20,33,47,66,90,108) mutual action.
2, according to the jack of claim 1, it is characterized by: when in above-mentioned chamber (5,18,38), placing a wedge-shaped element (9,23,36), the end face (7,21,34) of the pillar (3,16,30) of T shape piece (2,15,29) makes bevelled ， And and contacts with " work " surface (11,25,38) of wedge-shaped element (9,23,36).
3, according to the jack of claim 1, it is characterized by: when placing two wedge-shaped elements (50,51,93,94) in above-mentioned chamber, each " work " surface (54,55,97,98) all contacts with the outside face (49,92) of elastic cab (47,90) in two wedge-shaped elements (50,51,93,94).
4, jack according to claim 1, it is characterized by: have two wedge-shaped elements (69,70,111, an angle bar shape element (73 is set in the jack 112), 115), it is placed on wedge-shaped element (69,70,111,112) with elastic cab (66,108) And is with its outside face (74 between, 75,116,117) with wedge-shaped element (69,70,111,112) " work " surface (76,77,118,119) contact, and with its inside face (78,79,120,121) with elastic cab (66,108) outside face (68,110) contact.
5, according to the jack of claim 2, it is characterized by: the surface (39) of the wedge-shaped element (36) that contacts with elastic cab (33) makes curvilinear figure, its center of curvature (O
1) center of curvature (O of outside face (35) of approximate and elastic cab (33)
2) overlap, and its radius of curvature (R
1) be approximately equal to the radius of curvature (R of the outside face (35) of elastic cab (33)
2).
6, according to the jack of claim 3, it is characterized by: part " work " surface (97,98) of the wedge-shaped element (93,94) that contacts with elastic cab (90) makes curvilinear figure, their center of curvature (O
3, O
4) center of curvature (O of outside face (92) of approximate and elastic cab (90)
5) overlap, and their radius of curvature (R
3, R
4) be approximately equal to the radius of curvature (R of the outside face (92) of elastic cab (90)
5).
7, according to the jack of claim 4, it is characterized by: a part of inside face of angle bar shape element (115) (120,121) makes curvilinear figure, their center of curvature (O
6, O
7) center of curvature (O of outside face (110) of approximate and elastic cab (108)
8) overlap, and their radius of curvature (R
6, R
7) be approximately equal to the radius of curvature (R of the outside face (110) of elastic cab (108)
8).
8, according to the jack of claim 3, it is characterized by: in the chamber (58) of being limited by a part " work " surface (54,55) of a part of outside face (49) of elastic cab (47) and wedge-shaped element (50,51), and, all put into Powdered extending agent in each chamber in two chambeies (59,60) of being limited, the end (45) of another part " work " of wedge-shaped element (50,51) surface (54,55) and U-shaped base (42) by another part outside face (49) of elastic cab (47).
9, according to the jack of claim 4, it is characterized by: in the chamber (80) that a part of inside face (78,79) by a part of outside face (68) of elastic cab (66) and angle bar shape element (73) is limited, and, all put into Powdered extending agent in each chamber in two chambeies (81,82) that the end (64) of another part inside face of angle bar shape element (73) (78,79) and U-shaped base (61) is limited at another part outside face (68) by elastic cab (66).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100164 CN1053595A (en) | 1990-01-15 | 1990-01-15 | Jack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90100164 CN1053595A (en) | 1990-01-15 | 1990-01-15 | Jack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1053595A true CN1053595A (en) | 1991-08-07 |
Family
ID=4876507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90100164 Pending CN1053595A (en) | 1990-01-15 | 1990-01-15 | Jack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1053595A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700866A (en) * | 2019-11-07 | 2020-01-17 | 徐州众信矿业科技有限公司 | Mining hydraulic prop |
| CN111115503A (en) * | 2019-12-27 | 2020-05-08 | 燕山大学 | Three-stage telescopic jacking cylinder with pre-tightening heavy-load pressing wheel |
-
1990
- 1990-01-15 CN CN 90100164 patent/CN1053595A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110700866A (en) * | 2019-11-07 | 2020-01-17 | 徐州众信矿业科技有限公司 | Mining hydraulic prop |
| CN111115503A (en) * | 2019-12-27 | 2020-05-08 | 燕山大学 | Three-stage telescopic jacking cylinder with pre-tightening heavy-load pressing wheel |
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