CN211737177U - Limiting mechanism of hydraulic support - Google Patents
Limiting mechanism of hydraulic support Download PDFInfo
- Publication number
- CN211737177U CN211737177U CN202020072368.XU CN202020072368U CN211737177U CN 211737177 U CN211737177 U CN 211737177U CN 202020072368 U CN202020072368 U CN 202020072368U CN 211737177 U CN211737177 U CN 211737177U
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- China
- Prior art keywords
- top beam
- hydraulic support
- back timber
- round pin
- pin axle
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- 230000000670 limiting effect Effects 0.000 title claims abstract description 22
- 238000004891 communication Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 7
- 239000003245 coal Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model discloses a stop gear of hydraulic support, hydraulic support include through round pin axle articulated preceding back timber and back timber, still are connected with vice round pin axle between preceding back timber and the back timber, be the via hole with vice round pin axle complex hinge hole on preceding back timber or the back roof timber, leave the clearance between the inner wall of via hole and the vice round pin axle, the size of reserving is the biggest spacing space between preceding back timber and the back roof promptly. The hydraulic support is a sliding roadway advanced support device, the limiting mechanism is changed, and the problems that the top beam head lowering angle is too large and the top plate at the hinged position of the top beam is abraded in the support moving process are effectively solved.
Description
Technical Field
The utility model relates to a hydraulic support for the colliery especially relates to a hydraulic support's stop gear.
Background
In underground coal mining, a large number of tunnels need to be excavated downhole. The basic purpose of supporting the roadway is to alleviate and reduce the movement of surrounding rocks, so that the section of the roadway is not excessively reduced, and meanwhile, the scattered and damaged surrounding rocks are prevented from falling. The sliding top beam support is a support device between a hydraulic support and a single hydraulic prop, and consists of a top beam and a hydraulic upright post, wherein the front top beam and the rear top beam are guided to move forwards by taking hydraulic pressure as power. The method is generally suitable for the net lower caving coal working face of a thin or medium-thickness coal seam with gentle inclination, complete top plate and net lower mining. The ZH4700/22/30D type sliding roadway advance support device is a special advance support for belt roadway gate way and rail roadway gate way developed by the Beijing coal mine machinery Limited liability company of middlings.
The ZH4700/22/30D type sliding roadway advance support device is a main bearing component of a support, wherein a hydraulic upright column moves in a stepping mode to realize self-moving walking, and the hydraulic support bears the load of a top plate through a joist and a top beam. However, the top beams of the sliding support are generally too long, so that the movement posture of the support is directly influenced by the limit between the front top beam and the rear top beam in the process of walking and moving of the support. In order to ensure reliable work and long service life, the limiting mechanism of the hydraulic support plays an important role.
The technical scheme in the prior art is as follows:
as shown in fig. 1 and 2, the top beam hinge joint of the sliding support is a single pin shaft connection, and the front top beam 1 and the rear top beam 3 are connected and rotated by a pin shaft 2. The front top beam and the rear top beam are additionally provided with a limiting block 5 in order to avoid direct rigid contact between the plate 4 and the bent plate 6.
The prior art has the following disadvantages:
the spacing and positioning size of the limiting plates are difficult to guarantee due to the limitation of the existing processing capacity, and the effective action of the limiting blocks is greatly reduced. If the limit size error is 10mm, so that the top beam is deviated by 5 degrees, under the action of a top beam force arm with the length of four meters, the vertical distance between the lowest point of the top beam top plate and the highest point of the top beam top plate is close to 350 mm. The top plate at the hinged part of the top beam is easily worn in the process of moving the frame.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a stop gear of hydraulic support.
The utility model aims at realizing through the following technical scheme:
the utility model discloses a hydraulic support's stop gear, hydraulic support includes through round pin axle articulated front top beam and back timber, a serial communication port, still be connected with vice round pin axle between front top beam and the back timber, on front top beam or the back timber with vice round pin axle complex hinge hole is the via hole, the inner wall of via hole with leave the clearance between the vice round pin axle.
By the foregoing the utility model provides a technical scheme can see out, the embodiment of the utility model provides a hydraulic support's stop gear changes stop gear, and the effectual back timber low head angle of having solved is too big, moves the problem of the roof of the articulated department of frame process wearing and tearing back timber.
Drawings
FIG. 1 is a schematic structural diagram of a limiting mechanism of a hydraulic bracket in the prior art;
FIG. 2 is an enlarged view of the portion B of FIG. 1;
fig. 3 is a schematic side view of a limiting mechanism of a hydraulic bracket according to an embodiment of the present invention;
fig. 4 is a schematic bottom view of a limiting mechanism of a hydraulic bracket according to an embodiment of the present invention.
Detailed Description
Embodiments of the present invention will be described in further detail below. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
The utility model discloses a stop gear of hydraulic support, the concrete implementation mode of its preferred is:
the hydraulic support comprises a front top beam and a rear top beam which are hinged through a pin shaft, and is characterized in that an auxiliary pin shaft is further connected between the front top beam and the rear top beam, a hinge hole matched with the auxiliary pin shaft is formed in the front top beam or the rear top beam, and a gap is reserved between the inner wall of the via hole and the auxiliary pin shaft.
The diameter of the auxiliary pin shaft is phi A, the diameter of the through hole on the rear top beam matched with the auxiliary pin shaft for limiting is phi A + B, and the reserved size B is the maximum limiting space between the front top beam and the rear top beam.
The hydraulic support is a sliding roadway advance support device.
The utility model discloses a hydraulic support's stop gear changes stop gear, and the effectual back timber low head angle of having solved is too big, moves the problem of the roof of the articulated department of frame process wearing and tearing back timber.
The specific embodiment is as follows:
as shown in fig. 3 and 4, when the plate is blanked, a hole for mounting the auxiliary pin shaft 7 is cut on the front top beam 1 according to the drawing, and the processing precision of the hole can greatly improve the limiting capability.
The number of the connecting pin shafts 2 of the front top beam 1 and the rear top beam 3 is increased from 1 to 2 (the pin shafts 2 and the auxiliary pin shafts 7), so that the strength is increased.
The hinge size and tolerance of phi 80mm at the positions of the front top beam 1 and the pin shaft 2 are not changed, and the diameter of the pin shaft at the position of the newly added auxiliary pin shaft 7 is selected to be phi 60 mm. The diameter of the through hole 8 processed by the rear top beam 3 matched with the rear top beam for limiting is phi 76 mm. The reserved size is the maximum limit capacity of the front top beam and the rear top beam of the bracket.
The utility model discloses beneficial effect that technical scheme brought:
1. in the plate blanking stage, the plate is processed through holes, so that the original assembly welding is replaced, and the material is saved.
2. The limiting effect is seen, the problem that the top beam is too large in head lowering angle and the top plate at the hinged position of the top beam is abraded in the moving process is effectively solved.
3. The original hinge pin shaft is one, the number of the hinge pin shafts is increased to two, and the strength is greatly improved.
The utility model discloses a technical key point:
1. the limiting of the assembled and welded plates is changed into shaft hole limiting.
2. And the same pin shaft position is used for accurate limiting through the size difference of the through holes of the front top beam and the rear top beam.
3. A pair of pin shafts is added, so that the integrity of the top plate of the support is guaranteed while the strength is improved.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (3)
1. The utility model provides a stop gear of hydraulic support, hydraulic support includes through round pin axle articulated preceding back timber and back timber, a serial communication port, still be connected with vice round pin axle between preceding back timber and the back roof timber, on preceding back timber or the back roof timber with vice round pin axle complex hinge hole is the via hole, the inner wall of via hole with leave the clearance between the vice round pin axle.
2. The limiting mechanism of the hydraulic support according to claim 1, wherein the diameter of the auxiliary pin shaft is Φ a, the diameter of the through hole on the rear top beam matched with the auxiliary pin shaft for limiting is Φ a + B, and the reserved size B is the maximum limiting space between the front top beam and the rear top beam.
3. The limiting mechanism of the hydraulic support according to claim 1 or 2, wherein the hydraulic support is a sliding roadway advance support device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020072368.XU CN211737177U (en) | 2020-01-14 | 2020-01-14 | Limiting mechanism of hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020072368.XU CN211737177U (en) | 2020-01-14 | 2020-01-14 | Limiting mechanism of hydraulic support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211737177U true CN211737177U (en) | 2020-10-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020072368.XU Active CN211737177U (en) | 2020-01-14 | 2020-01-14 | Limiting mechanism of hydraulic support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211737177U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042846A (en) * | 2020-01-14 | 2020-04-21 | 中煤北京煤矿机械有限责任公司 | Limiting mechanism of hydraulic support |
-
2020
- 2020-01-14 CN CN202020072368.XU patent/CN211737177U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111042846A (en) * | 2020-01-14 | 2020-04-21 | 中煤北京煤矿机械有限责任公司 | Limiting mechanism of hydraulic support |
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