CN112901593A - Compact height-adjustable oil cylinder and coal mining machine - Google Patents
Compact height-adjustable oil cylinder and coal mining machine Download PDFInfo
- Publication number
- CN112901593A CN112901593A CN202110321558.XA CN202110321558A CN112901593A CN 112901593 A CN112901593 A CN 112901593A CN 202110321558 A CN202110321558 A CN 202110321558A CN 112901593 A CN112901593 A CN 112901593A
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- cylinder
- cylinder body
- compact
- oil
- heightening
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- 238000005065 mining Methods 0.000 title claims abstract description 33
- 239000003245 coal Substances 0.000 title claims abstract description 28
- 230000002457 bidirectional effect Effects 0.000 claims description 22
- 238000007789 sealing Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
- E21C25/16—Machines slitting solely by one or more rotating saws, cutting discs, or wheels
- E21C25/18—Saws; Discs; Wheels
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C31/00—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam
- E21C31/02—Driving means incorporated in machines for slitting or completely freeing the mineral from the seam for cutting or breaking-down devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B2015/268—Fluid supply for locking or release independent of actuator pressurisation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
The invention relates to a compact height-adjusting oil cylinder and a coal mining machine, wherein the compact height-adjusting oil cylinder comprises a cylinder body, a piston rod and a guide sleeve, the piston is fixed on one end of the piston rod, the piston is in sliding fit with the inner wall of the cylinder body, the guide sleeve is fixed at the opening of the cylinder body and seals the inner cavity of the cylinder body, the piston rod penetrates through the guide sleeve and is in sliding connection with the guide sleeve, and an anti-falling connecting pin is connected and installed between the guide sleeve and the cylinder body; the coal mining machine comprises a traction part, a cutting part and a compact heightening oil cylinder, wherein two ends of the compact heightening oil cylinder are respectively hinged with the traction part and the cutting part, and the compact heightening oil cylinder is positioned below the hinged connection position of the traction part and the cutting part. The invention can prevent the guide sleeve of the heightening oil cylinder from falling off, has more compact structure and can better meet the mining requirements of low mining height and thin coal seam.
Description
Technical Field
The invention relates to a height-adjustable oil cylinder and a coal mining machine using the same, which are suitable for mining low-mining-height and thin coal seams.
Background
The heightening oil cylinder is an important component of a heightening system of a coal mining machine, and is generally large in size in order to guarantee certain working thrust and stroke and meet strength requirements. In the design of the thin seam coal mining machine, the design of the oil cylinder is required to be as compact as possible due to space limitation.
The compact oil cylinder is generally short in stroke, when the mining height of the coal mining machine is increased, a piston rod of the oil cylinder can extend completely, and the piston can be in direct contact with the guide sleeve. The existing compact oil cylinder has larger and more rigorous space-saving design requirements under the low mining height and thin coal seam mining scenes, and the frequent action of a piston on a guide sleeve easily causes the failure of threaded connection between the guide sleeve and a cylinder body, thereby causing the falling of the guide sleeve.
Disclosure of Invention
The invention aims to provide a compact height-adjusting oil cylinder and a coal mining machine, which can prevent a guide sleeve from falling off, have a more compact structure and can better meet the requirements of low mining height and thin coal seam mining.
The main technical scheme of the invention is as follows:
the utility model provides a compact heightening oil cylinder and coal mining machine, includes cylinder body, piston rod and uide bushing, the piston is fixed in one of piston rod and is served, the piston with the inner wall sliding fit of cylinder body, the uide bushing is fixed the oral area of cylinder body seals the inner chamber of cylinder body, the piston rod runs through the uide bushing and with uide bushing sliding connection, it installs the anti-drop connecting pin to be connected between uide bushing and the cylinder body.
The oral area of cylinder body is equipped with the internal thread, be equipped with supporting external screw thread on the uide bushing, the external screw thread is located the axial middle part of uide bushing, the axial outer end of uide bushing is the annular flange that turns up, the annular flange is spacing in the oral area terminal surface of cylinder body and contacts with the cylinder body, anti-drop connecting pin extends along the axial of cylinder body, and the front and back portion of anti-drop connecting pin is located annular flange and cylinder body respectively.
The part of the pin hole where the anti-falling connecting pin is located in the annular rib is a through hole.
The stroke of the compact height-adjusting oil cylinder is 135 mm.
The length range of the compact height-adjusting oil cylinder is between 540 mm and 675 mm.
The cylinder body is fixedly provided with a bidirectional hydraulic lock, and two working oil ports of the bidirectional hydraulic lock are connected with two working oil holes of the heightening oil cylinder in a one-to-one manner.
The hydraulic cylinder is characterized in that a first cover plate and a second cover plate are welded on the outer side of a shell of the cylinder body, a first oil way is defined by the first cover plate, the cylinder body and the bidirectional hydraulic lock, a second oil way is defined by the second cover plate, the cylinder body and the bidirectional hydraulic lock, one end of the first oil way is communicated with one working oil port of the bidirectional hydraulic lock, the other end of the first oil way is communicated with a rod cavity through a first oil hole in the cylinder body, one end of the second oil way is communicated with the other working oil port of the bidirectional hydraulic lock, and the other end of the second oil way is communicated with a rodless cavity.
The utility model provides a coal mining machine, include traction part, cutting unit and compact heightening oil cylinder, the both ends of compact heightening oil cylinder are articulated with traction part and cutting unit respectively, compact heightening oil cylinder is located the below of the mutual articulated junction of traction part and cutting unit.
The invention has the beneficial effects that:
because the anti-falling connecting pin is arranged between the cylinder body of the oil cylinder and the guide sleeve, the guide sleeve can be effectively prevented from falling off due to the fact that the piston extrudes the guide sleeve, and therefore the working reliability of the heightening oil cylinder is improved.
Due to the adoption of the bidirectional hydraulic lock, the hydraulic cylinder can be reliably locked at any position when the heightening cylinder stops at the position in the stroke.
Because the cylinder body is integrated with the two-way hydraulic lock, the first oil way and the second oil way which are used for communicating the two-way hydraulic lock with the oil cylinder, the compact type height-adjusting oil cylinder has smaller volume and more compact structure, is more suitable for a narrow space below the joint of the traction part and the cutting part of the thin coal seam mining machine, and can better meet the mining requirements of low mining height and thin coal seam.
Drawings
FIG. 1 is a schematic structural view of an embodiment of the compact heightening cylinder of the present invention;
fig. 2 is a schematic connection diagram of the compact height-adjusting oil cylinder and a traction part and a cutting part on the coal mining machine.
Reference numerals:
A. a traction part; B. a cutting part; C. a compact height-adjusting oil cylinder; 1. a piston rod; 2. a guide sleeve; 3. sealing and combining; 4. an anti-drop connecting pin; 5. a cylinder body; 61. a first oil passage; 62. a second oil passage; 7. a piston; 8. two-way hydraulic lock.
Detailed Description
The invention discloses a compact height-adjusting oil cylinder, which comprises a cylinder body 5, a piston 7, a piston rod 1 and a guide sleeve 2, wherein the piston is fixed on one end of the piston rod, the piston is in sliding fit with the inner wall of the cylinder body, the guide sleeve is fixed at the opening of the cylinder body and seals the inner cavity of the cylinder body, and the piston rod penetrates through the guide sleeve and is in sliding connection with the guide sleeve. The guide sleeve also plays a role of a cylinder cover. The piston rod extends outwards to reach the end point of one end stroke when the piston is contacted with the guide sleeve. And an anti-falling connecting pin 4 is connected and installed between the guide sleeve and the cylinder body. The anti-drop connecting pin can make to be connected more firmly between uide bushing and the cylinder body, avoids the piston rod to stretch out the in-process of the terminal point of stroke because of the uide bushing of piston extrusion leads to the uide bushing to drop.
Sealing components, mainly dynamic sealing components, are arranged between the piston rod and the guide sleeve and between the piston and the cylinder body so as to avoid leakage of oil liquid in the relative sliding process of the piston rod and the guide sleeve.
The mouth of the cylinder body is provided with internal threads, the guide sleeve is provided with matched external threads, and the cylinder body and the guide sleeve are mainly fixedly connected through the threads. The external screw thread is located the axial middle part of uide bushing, the axial outer end of uide bushing is the annular flange that turns up, the annular flange is spacing in the oral area terminal surface of cylinder body and contacts with the cylinder body, anti-drop connecting pin extends along the axial of cylinder body, and the front and back of anti-drop connecting pin is located annular flange and cylinder body respectively. And a static seal is arranged between the axial inner end of the guide sleeve and the cylinder body. The anti-falling connecting pin can prevent the cylinder body and the guide sleeve from rotating relatively, so that the threaded connection can be prevented from loosening, and the purpose of preventing the guide sleeve from falling is achieved.
The piston is sleeved and fixed on the piston rod through threaded connection, and a static seal and an anti-rotation structure for preventing the thread from loosening are arranged between the piston and the piston rod. One end of the piston rod, which is sleeved with the piston, is arranged to be of a stepped shaft structure, and the piston is axially positioned by utilizing an annular stepped surface at a step.
The part of the pin hole where the anti-falling connecting pin is located in the annular rib is preferably a through hole so as to facilitate the installation of the anti-falling connecting pin. The part of the pin hole where the anti-falling connecting pin is located in the cylinder body is a blind hole.
The stroke of the compact height-adjusting oil cylinder is 135 mm.
The length of the cylinder body is greatly shortened by compressing the axial length of the piston and the guide sleeve, the length of the compact heightening oil cylinder (the distance between two hinged shaft holes at two ends) is preferably controlled to be 540-675mm, the working thrust of 377kN meeting the heightening requirement can be realized, and the requirement of small bedding amount of a coal mining machine during low-mining-height and thin coal seam mining can be better met.
And a bidirectional hydraulic lock 8 is fixedly installed on the cylinder body, and two working oil ports of the bidirectional hydraulic lock are connected with two working oil holes of the heightening oil cylinder in a one-to-one manner. The bidirectional hydraulic lock can be arranged at a position close to the bottom of the cylinder body, and is preferably fixed on the radial outer side of the cylinder body through a threaded fastener, so that no extra space is occupied in the axial direction of the cylinder body. Due to the adoption of the bidirectional hydraulic lock, the hydraulic cylinder can be reliably locked at any position when the heightening cylinder stops at the position in the stroke.
The hydraulic cylinder is characterized in that a first cover plate and a second cover plate are welded on the outer side of a shell of the cylinder body, the first cover plate, the cylinder body and the bidirectional hydraulic lock enclose a first oil path 61, the second cover plate, the cylinder body and the bidirectional hydraulic lock enclose a second oil path 62, one end of the first oil path is communicated with one working oil port of the bidirectional hydraulic lock, the other end of the first oil path is communicated with a rod cavity through a first oil hole in the cylinder body, one end of the second oil path is communicated with the other working oil port of the bidirectional hydraulic lock, and the other end of the second oil path is communicated with a rodless cavity through a second oil. The first oil path and the second oil path are integrated on the cylinder body, the internal oil duct of the cylinder body is communicated with the internal oil duct of the bidirectional hydraulic lock valve body, compared with the mode that the oil ducts are communicated between the valve body and the oil cylinder through a connecting rubber pipe, the structure is further simplified, the oil cylinder is heightened more compactly, the space occupation is further reduced, the requirements of a coal mining machine for low mining height and thin coal seam mining can be better met, and even the oil cylinder can be expanded and applied to other equipment with small installation space.
The cylinder body comprises a cylinder barrel and a cylinder base which is blocked at one end of the cylinder barrel, the cylinder barrel and the cylinder base are connected in a positioning mode through a circular seam allowance and are welded and fixed, and an opening of the second oil hole, which is communicated with the rodless cavity, is formed in the end face of the inner side of the cylinder base.
Furthermore, one end of the piston, which faces the cylinder base, is provided with a structure with an axially convex core part, one end of the cylinder base, which faces the piston, is provided with a structure with an axially concave core part, the diameter of the concave core part on the cylinder base is larger than that of the convex core part on the piston, and the concave depth of the core part on the cylinder base is larger than the convex height of the core part on the piston. The second oil hole communicates with an opening of the rodless chamber provided at an edge of the core portion on the cylinder base and directed toward a region other than the core portion on the piston. When the piston rod is at the end point of the contraction stroke, the piston is contacted with the cylinder base at the radial outer edge, and a slit is formed among the piston, the piston rod and the cylinder base.
The invention also discloses a coal mining machine, which comprises a traction part A, a cutting part B and the compact heightening oil cylinder C, wherein two ends of the compact heightening oil cylinder are respectively hinged with the traction part and the cutting part, and the compact heightening oil cylinder is positioned below the hinged connection part of the traction part and the cutting part. The compact height-adjusting oil cylinder can better meet the problems of small space and small lying bottom amount of the coal mining machine, and also solves the problem that a guide sleeve is easy to fall off, so that the corresponding coal mining machine can better adapt to the mining of low-mining-height, thin coal seams or extremely thin coal seams.
Claims (8)
1. The utility model provides a compact hydro-cylinder that increases which characterized in that: including cylinder body, piston rod and uide bushing, the piston is fixed in one of piston rod and is served, the piston with the inner wall sliding fit of cylinder body, the uide bushing is fixed the oral area of cylinder body seals the inner chamber of cylinder body, the piston rod runs through the uide bushing and with uide bushing sliding connection, be connected between uide bushing and the cylinder body and install the anti-drop connecting pin.
2. The compact heightening cylinder of claim 1, wherein: the oral area of cylinder body is equipped with the internal thread, be equipped with supporting external screw thread on the uide bushing, the external screw thread is located the axial middle part of uide bushing, the axial outer end of uide bushing is the annular flange that turns up, the annular flange is spacing in the oral area terminal surface of cylinder body and contacts with the cylinder body, anti-drop connecting pin extends along the axial of cylinder body, and the front and back portion of anti-drop connecting pin is located annular flange and cylinder body respectively.
3. The compact heightening cylinder of claim 2, wherein: the part of the pin hole where the anti-falling connecting pin is located in the annular rib is a through hole.
4. The compact heightening cylinder of claim 3, wherein: the stroke is 135 mm.
5. The compact heightening cylinder of claim 3, wherein: the length of which ranges between 540 and 675 mm.
6. The compact heightening cylinder of claim 1, 2, 3, 4 or 5, wherein: the cylinder body is fixedly provided with a bidirectional hydraulic lock, and two working oil ports of the bidirectional hydraulic lock are connected with two working oil holes of the heightening oil cylinder in a one-to-one manner.
7. The compact heightening cylinder of claim 6, wherein: the hydraulic cylinder is characterized in that a first cover plate and a second cover plate are welded on the outer side of a shell of the cylinder body, a first oil way is defined by the first cover plate, the cylinder body and the bidirectional hydraulic lock, a second oil way is defined by the second cover plate, the cylinder body and the bidirectional hydraulic lock, one end of the first oil way is communicated with one working oil port of the bidirectional hydraulic lock, the other end of the first oil way is communicated with a rod cavity through a first oil hole in the cylinder body, one end of the second oil way is communicated with the other working oil port of the bidirectional hydraulic lock, and the other end of the second oil way is communicated with a rodless.
8. A coal mining machine is characterized in that: the compact heightening oil cylinder comprises a traction part, a cutting part and the compact heightening oil cylinder as defined in any one of claims 1 to 7, wherein two ends of the compact heightening oil cylinder are respectively hinged with the traction part and the cutting part, and the compact heightening oil cylinder is positioned below the hinged connection part of the traction part and the cutting part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110321558.XA CN112901593A (en) | 2021-03-25 | 2021-03-25 | Compact height-adjustable oil cylinder and coal mining machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110321558.XA CN112901593A (en) | 2021-03-25 | 2021-03-25 | Compact height-adjustable oil cylinder and coal mining machine |
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| Publication Number | Publication Date |
|---|---|
| CN112901593A true CN112901593A (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110321558.XA Pending CN112901593A (en) | 2021-03-25 | 2021-03-25 | Compact height-adjustable oil cylinder and coal mining machine |
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| CN (1) | CN112901593A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321080A (en) * | 2021-11-23 | 2022-04-12 | 江阴市洪腾机械有限公司 | Safety lock hydraulic cylinder |
-
2021
- 2021-03-25 CN CN202110321558.XA patent/CN112901593A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114321080A (en) * | 2021-11-23 | 2022-04-12 | 江阴市洪腾机械有限公司 | Safety lock hydraulic cylinder |
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