CN212609257U - Hydraulic support jack and hydraulic support - Google Patents
Hydraulic support jack and hydraulic support Download PDFInfo
- Publication number
- CN212609257U CN212609257U CN202020388996.9U CN202020388996U CN212609257U CN 212609257 U CN212609257 U CN 212609257U CN 202020388996 U CN202020388996 U CN 202020388996U CN 212609257 U CN212609257 U CN 212609257U
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- hydraulic support
- piston rod
- blind hole
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- 238000007789 sealing Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims description 11
- 238000005065 mining Methods 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 description 9
- 230000032683 aging Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a hydraulic support jack and hydraulic support relates to mining machinery technical field, and the main objective reduces because of the sealed internal leakage that takes place that became invalid of sealing washer to guarantee to press support jack's normal work. This hydraulic support jack includes: a piston and a piston rod; the piston is provided with a blind hole, and one end of the piston rod is connected in the blind hole. The utility model discloses mainly used reduces because of the sealed internal leakage that takes place that became invalid of sealing washer.
Description
Technical Field
The utility model belongs to the technical field of mining machinery technique and specifically relates to a press support jack and hydraulic support.
Background
In the mining supporting equipment, a hydraulic support jack is equipment capable of changing the position and the movement direction of a hinged part connected with the hydraulic support jack, and during working, hydraulic pressure enters a working chamber through an internal or external channel, so that a piston rod makes telescopic movement relative to a cylinder body by changing the volume of the chamber, thereby completing an operation task.
At present, the connected mode between the piston of hydraulic support jack and the piston rod has the multiple, for example, piston and piston rod snap-fit connection etc. no matter what kind of cooperation connected mode is adopted between piston and the piston rod, the piston rod is usually for passing the piston, and need adopt quiet sealing washer to seal up the pole chamber and the rodless chamber in the cylinder body on the fitting surface of the two, however, the sealing washer is easy ageing or damaged and sealed inefficacy to easily lead to hydraulic support jack to take place the internal leakage, influence the jack normal work.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a press support jack and hydraulic support, the main objective reduces because of the sealed interior leakage that takes place that became invalid of sealing washer to guarantee to press support jack's normal work.
In order to achieve the above object, the embodiment of the present invention mainly provides the following technical solutions:
on the one hand, the embodiment of the utility model provides a hydraulic support jack, include:
a piston and a piston rod;
the piston is provided with a blind hole, and one end of the piston rod is connected in the blind hole.
Furthermore, an inner thread is arranged on the inner wall of the blind hole;
and an external thread matched with the internal thread is arranged on the outer wall of one end of the piston rod, and one end of the piston rod is in threaded connection with the inside of the blind hole.
Furthermore, the blind hole comprises a first section and a second section which are sequentially arranged from the hole opening to the hole bottom, and the inner wall of the first section is a smooth surface;
the internal thread is arranged on the second section;
one end of the piston rod comprises a third section and a fourth section which are sequentially arranged from the end part to the other end, and the inner wall of the fourth section is a smooth surface;
the external thread is arranged on the third section;
the second section is in threaded connection with the third section, and the first section is coaxial with the fourth section and is in clearance fit with the fourth section.
Further, the inner diameter of the first section is greater than the inner diameter of the second section;
the inner diameter of the fourth section is larger than that of the third section.
Further, the hydraulic support jack also comprises a cylinder body;
the piston and the piston rod are arranged in the cylinder body;
a sealing ring, a first guide ring and a second guide ring are sleeved outside the piston;
the piston is contacted with the inner wall of the cylinder body through the sealing ring, the first guide ring and the second guide ring.
Further, the first guide ring and the second guide ring are respectively located on two sides of the sealing ring.
Furthermore, a protrusion is arranged on the end face of one end of the piston, which is far away from the blind hole, and the protrusion is used for abutting against the inner wall of the cylinder body, so that an annular cavity communicated with the liquid inlet hole is formed among the outer wall of the piston, the outer wall of the protrusion and the inner wall of the cylinder body in a surrounding manner.
On the other hand, the embodiment of the utility model provides a still provides a hydraulic support, has the jack, the jack is aforementioned hydraulic support jack.
Borrow by above-mentioned technical scheme, the utility model discloses following beneficial effect has at least:
the embodiment of the utility model provides a hydraulic support jack is through setting up the blind hole on the piston for the one end of piston rod can be connected in this blind hole, realizes being connected between piston and the piston rod. Because the piston rod is inserted in the blind hole of the piston, when pressure liquid passes through the matching surface of the piston and the piston, the pressure liquid can be blocked by the inner wall of the blind hole and cannot flow into the rodless cavity in the cylinder body, namely, the piston can seal the cylinder body into the rod cavity and the rodless cavity through the blind hole on the piston, so that the rod cavity and the rodless cavity do not need to be sealed by adopting a static sealing ring on the matching surface of the piston and the piston rod, the internal leakage of the jack caused by the aging or damage of the sealing ring is reduced, the internal leakage points are reduced, and the normal work of the jack is ensured. And moreover, a static sealing groove does not need to be processed on the piston, so that the manufacturing cost is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic structural diagram of a hydraulic support jack provided by an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In the description of the present embodiment, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present embodiment.
As shown in fig. 1, an embodiment of the present invention provides a hydraulic support jack, which includes a piston 1 and a piston rod 2; the piston 1 is provided with a blind hole 11, and the piston rod 2 is inserted in the blind hole 11. Specifically, the blind hole 11 may be disposed to extend in an axial direction of the piston 1, and one end of the piston rod 2 is connected in the blind hole 11, so as to achieve connection between the piston 1 and the piston rod 2.
It can be understood that, the one end of piston rod 2 is connected in blind hole 11 of piston 1, rather than directly passing piston 1 for piston 1 can surround piston rod 2's tip through the inner wall of its blind hole 11, and so, when pressure fluid passes through the mating surface of piston 1 and piston rod 2, can naturally can be because of the no pole chamber that blocks of blind hole 11 inner wall in the cylinder body, that is to say, the embodiment of the utility model provides a, because piston 1's blind hole 11 surrounds piston rod 2's tip, the pressure fluid that flows into the two mating surfaces can not get into the no pole chamber of cylinder body naturally, consequently, just also need not to set up the static sealing circle again between piston 1 and piston rod 2 and seal up the pole chamber and the no pole chamber in the cylinder body, can cancel the static sealing circle between piston 1 and the piston rod 2 to the leak source that has reduced because of static sealing inefficacy and.
The embodiment of the utility model provides a hydraulic support jack is through setting up blind hole 11 on piston 1 for piston rod 2's one end is connected in this blind hole 11, realizes being connected between piston 1 and the piston rod 2. Because the piston rod 2 is inserted in the blind hole 11 of the piston 1, when the pressure liquid passes through the matching surface of the piston and the piston, the pressure liquid is blocked by the inner wall of the blind hole 11 and cannot flow into the rodless cavity in the cylinder body, namely, the piston 1 can seal the cylinder body into the rod cavity and the rodless cavity through the blind hole 11 on the piston, so that the rod cavity and the rodless cavity do not need to be sealed by adopting a static sealing ring on the matching surface of the piston 1 and the piston rod 2, the internal leakage of the jack caused by the aging or damage of the sealing ring is reduced, the internal leakage points are reduced, and the normal work of the jack is ensured. Moreover, a static sealing groove does not need to be processed on the piston 1, and the manufacturing cost is reduced.
In an alternative embodiment, the inner wall of the blind hole 11 may be provided with an internal thread; an external thread matched with the internal thread can be arranged on the outer wall of one end of the piston rod 2, so that one end of the piston rod 2 is connected in the blind hole 11 in a threaded mode. Through carrying out threaded connection with piston 1 and piston rod 2, not only the equipment of this hydraulic support jack of being convenient for, still be convenient for its maintenance, of course, can also adopt connection methods such as card key between piston 1 and the piston rod 2, specifically can decide according to actual conditions.
In an alternative embodiment, referring to fig. 1, the blind hole 11 may include a first section 111 and a second section 112 sequentially arranged from the hole opening to the hole bottom, the inner wall of the first section 111 is a smooth surface, and an internal thread may be provided on the second section 112; one end of the piston rod 2 may include a third section 21 and a fourth section 22 sequentially arranged from the end to the other end, an inner wall of the fourth section 22 may be a smooth surface, and an external thread may be provided to the third section 21; the second section 112 and the third section 21 are screwed, and the first section 111 and the fourth section 22 are coaxial and are in clearance fit.
In the above-mentioned embodiment, through set up internal thread section and smooth surface section in blind hole 11, simultaneously, set up corresponding external screw thread section and smooth surface section on piston rod 2, and piston rod 2 and piston 1 carry out threaded connection through internal thread section and external screw thread section, and through smooth surface section clearance fit separately, because first section 111 and the coaxial and clearance fit of these two smooth surface sections of fourth section 22, consequently, threaded connection's piston rod 2 and piston 1 can guarantee fine axiality, thereby guarantee this hydraulic support jack's normal work.
The first section 111 and the second section 112 may be connected or adjacent to each other, that is, the blind hole 11 may be divided into two sections, that is, the first section 111 and the second section 112, which are sequentially arranged from the hole opening to the hole bottom, or may include more than two sections, that are sequentially arranged from the hole opening to the hole bottom; likewise, the third section 21 and the fourth section 22 may be connected or adjacent to each other, that is, one end of the piston rod 2 may have only two sections, that is, the third section 21 and the fourth section 22, arranged in sequence from the end to the other end, or may include more than two sections arranged in sequence from the end to the other end, and the threaded section and the smooth surface section of the two are not limited to one section, as long as they correspond to each other, the threaded connection between the two is realized, and the smooth surface sections are coaxial and are in clearance fit. Specifically, in the present embodiment, the first segment 111 and the second segment 112 may be connected to each other, and the third segment 21 and the fourth segment 22 may be connected to each other.
In an alternative embodiment, referring to FIG. 1, the inner diameter of the first section 111 may be greater than the inner diameter of the second section 112; the fourth section 22 has an inner diameter greater than the inner diameter of the third section 21. Such a structural arrangement facilitates assembly between the piston 1 and the piston rod 2, and also facilitates clearance fit between the first section 111 and the fourth section 22, thereby further ensuring coaxiality between the piston 1 and the piston rod 2.
It should be noted that, because the inner diameter of the first section 111 is larger than the inner diameter of the second section 112, and the inner diameter of the fourth section 22 is larger than the inner diameter of the third section 21, a step is formed at the joint of the first section 111 and the second section 112, and a step is formed at the joint of the third section 21 and the fourth section 22, at this time, the lengths of the second section 112 and the third section 21 should be set to be long enough to ensure that the second section 112 and the third section 21 can have enough threaded connection length before or when two step surfaces are in contact with each other when the piston 1 and the piston rod 2 are assembled, so as to ensure the connection strength of the piston 1 and the piston rod 2.
In an alternative embodiment, referring to fig. 1, the hydraulic support jack further comprises a cylinder 3; the piston 1 and the piston rod 2 are arranged in the cylinder 3; the outer part of the piston 1 can be sleeved with a sealing ring 31, a first guide ring 32 and a second guide ring 33; the piston 1 is in contact with the inner wall of the cylinder 3 through the seal ring 31, the first guide ring 32, and the second guide ring 33. Wherein, the seal ring 31 is used as the main seal of the piston 1 and the piston rod 2, and the seal ring 31 is used for maintaining the pressure of a rod cavity and a rodless cavity in the cylinder 3; the first and second guide rings 32 and 33 serve to support the piston 1 in a reciprocating motion within the cylinder 3 to prevent the piston 1 from coming into direct contact and friction with the cylinder 3 during the motion, thereby protecting the cylinder 3 and the piston 1 from being damaged. Specifically, the first guide ring 32 and the second guide ring 33 may be respectively located at two sides of the seal ring 31, and specifically may be located at two ends of the piston rod 2, so as to ensure that the piston 1 is coaxial with the cylinder 3, and better protect the cylinder 3 and the piston 1 from being damaged.
In an alternative embodiment, referring to fig. 1, a protrusion 12 may be disposed on an end surface of the piston 1 opposite to the blind hole 11, and the protrusion 12 is configured to abut against an inner wall of the cylinder 3, such that an annular cavity 13 communicating with the liquid inlet 34 is defined between an outer wall of the piston 1, an outer wall of the protrusion 12, and the inner wall of the cylinder 3, and therefore, the pressure liquid can smoothly enter the rodless cavity through the liquid inlet 34.
The embodiment of the utility model provides a hydraulic support still provides, has the jack, and this jack is aforementioned hydraulic support jack, can refer to fig. 1.
The embodiment of the utility model provides a hydraulic support has the jack, and this jack is through setting up blind hole 11 on piston 1 for the one end of piston rod 2 is connected in this blind hole 11, realizes being connected between piston 1 and the piston rod 2. Because the piston rod 2 is inserted in the blind hole 11 of the piston 1, when pressure liquid passes through the matching surface of the piston and the piston, the pressure liquid is blocked by the inner wall of the blind hole 11 and cannot flow into the rodless cavity in the cylinder 3, namely, the piston 1 can seal the cylinder 3 into the rod cavity and the rodless cavity through the blind hole 11 on the piston, so that the rod cavity and the rodless cavity do not need to be sealed by adopting the static sealing ring 31 on the matching surface of the piston 1 and the piston rod 2, the internal leakage of the jack caused by the aging or damage of the sealing ring 31 is reduced, the internal leakage points are reduced, and the normal work of the jack is ensured. Moreover, a static sealing groove does not need to be processed on the piston 1, and the manufacturing cost is reduced.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (7)
1. A hydraulic jack support comprising:
a piston and a piston rod;
a blind hole is formed in the piston, and one end of the piston rod is connected into the blind hole;
the inner wall of the blind hole is provided with internal threads;
and an external thread matched with the internal thread is arranged on the outer wall of one end of the piston rod, and one end of the piston rod is in threaded connection with the inside of the blind hole.
2. The hydraulic support jack of claim 1,
the blind hole comprises a first section and a second section which are sequentially arranged from the hole opening to the hole bottom, and the inner wall of the first section is a smooth surface;
the internal thread is arranged on the second section;
one end of the piston rod comprises a third section and a fourth section which are sequentially arranged from the end part to the other end, and the inner wall of the fourth section is a smooth surface;
the external thread is arranged on the third section;
the second section is in threaded connection with the third section, and the first section is coaxial with the fourth section and is in clearance fit with the fourth section.
3. The hydraulic support jack of claim 2,
the inner diameter of the first section is greater than the inner diameter of the second section;
the inner diameter of the fourth section is larger than that of the third section.
4. The hydraulic support jack of claim 1,
the hydraulic support jack also comprises a cylinder body;
the piston and the piston rod are arranged in the cylinder body;
a sealing ring, a first guide ring and a second guide ring are sleeved outside the piston;
the piston is contacted with the inner wall of the cylinder body through the sealing ring, the first guide ring and the second guide ring.
5. The hydraulic support jack of claim 4,
the first guide ring and the second guide ring are respectively positioned on two sides of the sealing ring.
6. The hydraulic support jack of claim 4,
and a bulge is arranged on the end face of one end of the piston, which is far away from the blind hole, and the bulge is used for abutting against the inner wall of the cylinder body, so that an annular cavity communicated with the liquid inlet hole is formed among the outer wall of the piston, the outer wall of the bulge and the inner wall of the cylinder body.
7. A hydraulic support with a jack is characterized in that,
the jack is a hydraulic support jack as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020388996.9U CN212609257U (en) | 2020-03-24 | 2020-03-24 | Hydraulic support jack and hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020388996.9U CN212609257U (en) | 2020-03-24 | 2020-03-24 | Hydraulic support jack and hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212609257U true CN212609257U (en) | 2021-02-26 |
Family
ID=74708635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020388996.9U Expired - Fee Related CN212609257U (en) | 2020-03-24 | 2020-03-24 | Hydraulic support jack and hydraulic support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212609257U (en) |
-
2020
- 2020-03-24 CN CN202020388996.9U patent/CN212609257U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210226 |