CN107826964B - Connector between hydraulic support and movable pulley device - Google Patents
Connector between hydraulic support and movable pulley device Download PDFInfo
- Publication number
- CN107826964B CN107826964B CN201711290391.5A CN201711290391A CN107826964B CN 107826964 B CN107826964 B CN 107826964B CN 201711290391 A CN201711290391 A CN 201711290391A CN 107826964 B CN107826964 B CN 107826964B
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- plate
- pin
- vertical
- hydraulic support
- hole
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/006—Equipment transport systems
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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)
- Connection Of Plates (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a connector between a hydraulic support and a movable pulley device, which comprises an inserting piece, a pin connecting piece, a limiting plate and a bolt component, wherein a baffle plate of the inserting piece is welded with the rear end of a plugboard, and the inserting piece is L-shaped after being welded; the front end of the plugboard is provided with a pin hole; the pin connecting piece is formed by welding a transverse plate, a vertical plate and a vertical pin column and is T-shaped, and the vertical plate is provided with a hinge hole; the inserting plate of the inserting piece is inserted into a gap between the bottom of a connecting rod of the hydraulic support and the base from the inside of the hydraulic support and extends to the rear of the hydraulic support, and the baffle is limited by the connecting rod; the vertical pin column of the pin connecting piece is arranged in the pin column hole of the inserting plate, the limiting plate is arranged in the limiting groove of the vertical pin column, and the bolt assembly is used for connecting the inserting piece, the pin connecting piece and the limiting plate together; thus, the invention is connected with the hydraulic support; after the hinge hole is connected with the movable pulley device, the connection between the hydraulic support and the movable pulley device is realized.
Description
Technical Field
The invention relates to a connector connected with a hydraulic support, in particular to a connector for connecting the hydraulic support with a movable pulley device, and belongs to the field of mine rail auxiliary transportation equipment.
Background
The hydraulic support used on the fully mechanized mining face of some coal mines is single and heavy, the transportation capacity of the transportation winch of the inclined drift cannot meet the requirement of the whole machine transportation of the heavy hydraulic support, and the transportation of the hydraulic support is difficult. In order to solve the transportation problem, a plurality of mines adopt a method of 'becoming integral to zero', namely equipment is disassembled on the well and transported to a working position for reassembling in batches, and a hydraulic support disassembling and assembling table is generally arranged on the well and under the well respectively to disassemble and assemble the hydraulic supports. The transportation method has low efficiency and high cost and also has certain danger. In order to solve the problem, the transportation capacity of the transportation system is improved, and the university of Chinese mining industry designs a movable pulley traction connection device (201310308163.1) for inclined drift transportation heavy equipment, wherein the movable pulley traction connection device is used for connecting a winch and the heavy equipment to improve the transportation capacity of the transportation system, so that the whole machine transportation of the heavy equipment by using the original transportation winch is realized. In order to solve the transportation problem of the hydraulic support, chinese patent literature (patent number: ZL 201310310997.6) discloses a movable pulley traction connection device for inclined drift transportation hydraulic support, which is used for connecting a winch and the hydraulic support to improve the transportation capacity of a transportation system and realize the whole machine transportation of the heavy hydraulic support by using the original transportation winch. However, the connecting device disclosed in the patent document (ZL 201310310997.6) can only connect hydraulic supports that use split-type links and have a certain gap in the vertical direction between the two left and right links, and cannot be used for a hydraulic support in which the links of the hydraulic support are integral. Therefore, when the movable pulley device is used for transporting the hydraulic support with no vertical clearance of the connecting rod, a special connector is required to be designed.
Disclosure of Invention
The invention aims to solve the technical problems in the prior art and provides a connector between a hydraulic support and a movable pulley device, which is used for the hydraulic support with a rear connecting rod and no vertical clearance.
The technical scheme for solving the technical problems is as follows:
a connector between a hydraulic mount and a traveling block device, comprising: a plug-in member, a pin connector and a bolt assembly; the inserting and hanging piece comprises an inserting plate and a baffle plate, wherein the front end of the inserting plate is provided with a pin hole and a plurality of first connecting holes; the baffle is vertically fixed at the rear end of the board surface of the board and is L-shaped, and the fixing mode can be a welding mode; the pin connecting piece comprises a transverse plate, a vertical plate and a vertical pin column; the transverse plate is provided with a penetrating pin hole and a plurality of connecting holes II, and the connecting holes II and the connecting holes I are distributed at corresponding positions; the front end of the vertical plate is provided with a hinge hole, and the rear end of the vertical plate and the transverse plate are vertically fixed (welded) together and are T-shaped; the vertical pin posts are arranged in the pin penetrating holes of the transverse plates, and the vertical pin posts, the transverse plates and the vertical plates are fixed into a whole; the vertical pin is matched with the pin hole position of the plugboard.
The lower end of the vertical pin post is provided with a limit groove, and a limit plate is arranged in matching with the limit groove; the limiting plate front end is equipped with spacing recess and is equipped with a plurality of connecting holes III on the face, works as the vertical pin post inserts the pin post hole on the picture peg, the vertical pin post the spacing groove exposes just the picture peg, the limiting plate the spacing recess inserts when the spacing groove of vertical pin post, the position corresponds connecting hole one connecting hole two with connecting hole three just coaxial line.
The further optimization scheme is as follows: the baffle plate and the plugboard are welded through reinforcing rib plates.
Further, the baffle is provided with a handle.
Further, a fork supporting plate is arranged at the top of the vertical plate.
Through the technical scheme, the baffle plate of the inserting piece and the inserting plate are welded together, and the rib plates increase the welding strength of the baffle plate. The transverse plate is welded with the vertical plate, and the vertical pin columns are welded with the transverse plate and the vertical plate together, so that the strength and the fixing fastness of the pin connecting piece are improved.
When in use, the utility model is characterized in that: the inserting plate is inserted into a gap between the connecting rod and the base from the inside of the hydraulic support and penetrates out of the rear part of the hydraulic support, and the baffle plate of the inserting and hanging piece is hung at the end head of the connecting rod. The pin connecting piece is connected with the inserting piece from the rear of the hydraulic support, the connecting method is that the transverse plate of the pin connecting piece is attached with the inserting plate of the inserting piece from the upper side, and the vertical pin column is inserted into the pin column hole of the inserting plate. At this time, the limit groove of the vertical pin post is exposed from the bottom surface of the transverse plate, and the limit groove of the limit plate is arranged in the limit groove of the vertical pin post, so that axial limit is performed. And the inserting plate, the transverse plate and the limiting plate are connected together by adopting the bolt assembly. In this way, the insert is integrally connected to the pin. The hinge hole at the rear of the pin is connected with the connecting plate of the movable pulley device in a hinge manner.
Therefore, the inserting and hanging piece is limited between the connecting rod of the support and the base, the pin connecting piece is connected with the inserting and hanging piece, the front end of the pin connecting piece is connected with the movable pulley device, and connection between the hydraulic support and the movable pulley device is achieved. The plug-in components piece sets up the handle, be convenient for the plug-in components piece is placed in the hydraulic support connecting rod with in the clearance between the base. The fork supporting plate on the vertical plate is convenient to adopt auxiliary tools such as a forklift to enable the pin connection piece to be connected with the plug-in piece, when the plug-in piece is forked by the forklift, two front forks of the forklift extend from two sides of the vertical plate to the lower portion of the fork supporting plate to enable the plug-in piece to be lifted, and therefore the pin connection piece is convenient to be connected with the plug-in piece.
The following beneficial effects can be obtained by adopting the technical scheme of the invention: the hydraulic support is connected with the hydraulic support, the connection is convenient, the plug-in connector and the pin connector are connected at the rear of the hydraulic support, the operation space is large, and the connection is convenient.
Drawings
Fig. 1 is a schematic perspective view of a hydraulic mount.
Fig. 2 is a schematic perspective view of a first embodiment of the present invention.
Fig. 3 is an exploded view of a first embodiment of the present invention.
Fig. 4 is a schematic perspective view of the first embodiment of the insert member shown in fig. 2.
Fig. 5 is a schematic perspective view of the pin connection of the first embodiment shown in fig. 2.
Fig. 6 is a state diagram of the embodiment of fig. 2 when connected to the hydraulic mount of fig. 1.
Fig. 7 is a state diagram of a connection between the hydraulic support and the traveling block device shown in fig. 1 according to an embodiment of the present invention.
Fig. 8 is another state diagram of a connection between the hydraulic bracket and the traveling block device shown in fig. 1 according to an embodiment of the present invention.
Fig. 9 is a partial enlarged view at I in fig. 8.
Fig. 10 is a schematic perspective view of a second embodiment of the present invention.
A00 hydraulic support
A1, connecting rod; a2, a base; a3, clearance;
b00 movable pulley device;
b1, a movable pulley; b2, auxiliary transport vehicle; b3, connecting the plates;
c00 flat mine car;
d00 rail;
100 a connector between the hydraulic support and the movable pulley device;
1, inserting a hanging piece;
11 plugboards;
111 pin holes; 112 connecting hole one;
12 baffles;
13 rib plates;
131 front rib plates; 132 rear rib plates;
14 handles;
2, a pin connecting piece;
a cross plate 21;
211 through pin holes; 212 connecting the second hole;
22 vertical plates;
221 notch; 222 hinge holes;
23 pins;
231 limit grooves;
a 24-fork pallet;
25 handles;
3, limiting plates;
31 arc segments; 32 connecting holes III;
4 bolt assembly.
Detailed Description
The following detailed description of embodiments of the invention, and further illustrating the invention, is exemplary and is not to be construed as limiting the invention by way of example only.
The connector 100 between the hydraulic mount and the movable sheave apparatus according to the embodiment of the present invention is described in detail below with reference to fig. 1 to 10, and one end of the connector 100 between the hydraulic mount and the movable sheave apparatus is connected to the hydraulic mount a00, and the other end is connected to the movable sheave apparatus B00. The hydraulic support A00 refers to a hydraulic support with no vertical clearance of a connecting rod, as shown in fig. 1, a rear connecting rod A1 of the hydraulic support A00 is integrated, and a clearance A3 exists between the bottom of the connecting rod A1 and a base A2. During transportation, the hydraulic support A00 is connected to the flat mining car C00, and the flat mining car C00 is placed on the steel rail D00; the movable pulley device B00 comprises a movable pulley B1, an auxiliary transport vehicle B2 and a connecting plate B3, wherein the movable pulley B1 is connected with the auxiliary transport vehicle B2, the auxiliary transport vehicle B2 is arranged on a steel rail D00, and the connecting plate B3 is used for being connected with a connector 100 between a hydraulic support and the movable pulley device, and can be seen in fig. 7, 8 and 9.
Fig. 2 and 3 are schematic structural views of an embodiment of the present invention, wherein a connector 100 between a hydraulic support and a movable pulley device comprises a plug-in unit 1, a pin connection unit 2, a limiting plate 3 and a bolt assembly 4. As shown in fig. 4, the insert 1 includes an insert plate 11, a baffle 12 and a rib plate 13, and a pin hole 111 and a connecting hole 112 are formed at the front end of the insert plate 11. The baffle 12 is welded perpendicularly to the rear end of the insert plate 11 and is L-shaped after welding. The baffle 12 and the plugboard 11 are welded with each other through reinforcing plates 13. In this embodiment, the rib 13 includes a front rib 131 and a rear rib 132, which are welded with the insert plate 11 and the baffle 12 from the front and rear sides of the baffle 12. The plug-in unit 1 is inserted into a gap between the bottom of a connecting rod A1 of the hydraulic support A00 and the base A2 from the inside of the hydraulic support A00, the plug board 11 extends out of a gap A3 between the connecting rod A1 of the hydraulic support A00 and the base A2 to the rear of the hydraulic support A00, and the baffle 12 is limited by the connecting rod A1, see fig. 6 and 9. Fig. 5 is a perspective view of the pin joint 2, and the pin joint 2 includes a cross plate 21, a vertical plate 22, and a vertical pin 23. The cross plate 21 is provided with a through pin hole 211 and a second connecting hole 212. The middle part of the vertical plate 22 is provided with a notch 221, the rear end is provided with a hinge hole 222, the hinge hole 222 is used for being connected with the movable pulley device B00, the front end of the vertical plate 22 and the middle part of the transverse plate 21 are vertically welded together to form a T shape, and the position of the through pin hole 211 corresponds to the position of the notch 221. The vertical pin 23 is arranged in the through pin hole 211 of the transverse plate 21 and is arranged in the notch 221 of the vertical plate 22, and the vertical pin 23 is welded with the transverse plate 21 and the vertical plate 22. The lower end of the vertical pin 23 is provided with a limit groove 231, and the limit groove 231 in the embodiment is an annular groove. The pin connector 2 is connected with the plug-in unit 1 from the upper side, the bottom surface of the transverse plate 21 is contacted with the upper surface of the plug-in board 11, the vertical pin 23 of the pin connector 2 is arranged in the pin hole 111 of the plug-in board 11, the vertical pin 23 is in clearance fit with the pin hole 111, and the limiting groove 231 is exposed out of the plug-in board 11. The limiting plate 3 is provided with a connecting hole III 32, the limiting plate 3 is arranged below the inserting plate 11 of the inserting piece 1, and the arc section 31 of the limiting plate 3 is inserted into the limiting groove 231 of the vertical pin post 23. In this embodiment, the limiting groove of the limiting plate 3 is an arc segment (as shown in fig. 3), and the arc segment is inserted into the annular groove. The bolt assembly 4 connects the plugboard 11, the transverse board 21 and the limiting plate 3 together through the first connecting hole 112 of the plugboard 11, the second connecting hole 212 of the transverse board 21 and the third connecting hole 32 of the limiting plate 3.
As shown in fig. 2, 3 and 4, the insert 1 of the present embodiment further includes a handle 14, and the handle 14 is welded to the rear end of the insert 1. As shown in fig. 5, the riser 22 of the pinning member 2 of the present embodiment further includes a fork pallet 24. In other embodiments, a handle 25 is also attached to the fork carriage 24 to facilitate hand-held installation by the installer, as shown in FIG. 10.
Through the technical scheme, the baffle 12 and the plugboard 11 of the plugboard 1 are welded together, and the rib plates 13 increase the welding strength. The transverse plate 21 and the vertical plate 22 of the pin connecting piece 2 are welded, and the vertical pin posts 23 are welded with the transverse plate 21 and the vertical plate 22, so that the strength of the pin connecting piece 2 is increased. The plugboard 11 of the plugboard 1 is inserted into a gap between the connecting rod A1 and the base A2 from the inside of the hydraulic support A00, and penetrates out from the rear part of the hydraulic support A00, and the baffle 12 of the plugboard 1 is hung at the end of the connecting rod A1. The pin connector 2 is connected with the plugboard 11 of the plugboard 1 from the rear part of the hydraulic support A00, the vertical pin 23 of the pin connector 2 is inserted into the pin hole 111 of the plugboard 11, at the moment, the limit groove 231 of the vertical pin 23 is exposed from the bottom surface of the transverse plate 21, the limit plate 3 is placed in the limit groove 231, the axial limit is carried out, and the plugboard 11, the transverse plate 21 and the limit plate 3 are connected together by adopting the bolt assembly 4. In this way, the insert 1 is connected to the pin 2 as a single piece. The connected state is shown in fig. 5. The movable pulley device B00 for traction of the hydraulic support A00 comprises a movable pulley B1, an auxiliary transport vehicle B2 and a connecting plate B3, wherein the movable pulley B1 is connected to the auxiliary transport vehicle B2, the movable pulley B1 is connected with the connecting plate B3, and the auxiliary transport vehicle B2 is placed on a steel rail D00. The rear part of the pin coupling 2 is provided with a hinge hole 222, and the hinge hole 222 is connected to the connection plate B3 of the movable pulley device B00. In this way, the insert 1 is limited between the connecting rod A1 and the base A2 of the bracket, the pin connection piece 2 is connected with the insert 1, and the rear end of the pin connection piece 2 is connected with the connecting plate B3 of the movable pulley device B00, so that the connection between the hydraulic bracket a00 and the movable pulley device B00 is realized, as shown in fig. 7, 8 and 9.
Through the above technical scheme, the plug-in unit 1 is provided with the handle 14, so that the plug-in unit 1 is conveniently placed in the gap A3 between the connecting rod A1 and the base A2 of the hydraulic support B00. The fork carrier 24 facilitates the fork of the hanger 1 using an auxiliary tool such as a forklift. When the fork truck is used for fork lifting of the hanger 2, two front forks of the fork truck extend to the lower part of the fork supporting plate 24 from two sides of the vertical plate 22 to lift the hanger 1. This facilitates the connection of the pin 2 to the insert 1.
The technical scheme of the invention realizes the connection with the hydraulic support A00, the connection is more convenient, the plug-in unit 1 and the pin connecting unit 2 are connected behind the hydraulic support A00, the operation space is large, and the connection is convenient.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.
Claims (5)
1. The connector between the hydraulic support and the movable pulley device is characterized by comprising a plug-in piece, a pin connecting piece and a bolt component;
the inserting and hanging piece comprises an inserting plate and a baffle plate, and the front end of the inserting plate is provided with a pin hole and a plurality of first connecting holes; the baffle is vertically fixed at the rear end of the board surface of the board and is L-shaped; the pin connecting piece comprises a transverse plate, a vertical plate and a vertical pin column; the transverse plate is provided with a penetrating pin hole and a plurality of connecting holes II, and the connecting holes II and the connecting holes I are correspondingly distributed; the front end of the vertical plate is provided with a hinge hole, and the rear end of the vertical plate is vertically fixed with the transverse plate and takes a T shape; the vertical pin posts are arranged in the pin penetrating holes of the transverse plates, and the vertical pin posts, the transverse plates and the vertical plates are fixed into a whole; the vertical pin is matched with the pin hole position of the plugboard.
2. The connector between a hydraulic mount and a traveling block device of claim 1, wherein: the lower end of the vertical pin post is provided with a limit groove, and a limit plate is arranged in matching with the limit groove; the limiting plate front end is equipped with spacing recess and is equipped with a plurality of connecting holes III on the face, works as the vertical pin post inserts the pin post hole on the picture peg, the vertical pin post the spacing groove exposes just the picture peg, the limiting plate the spacing recess inserts when the spacing groove of vertical pin post, the position corresponds connecting hole one connecting hole two with connecting hole three just coaxial line.
3. The connector between a hydraulic mount and a traveling block device of claim 1, wherein: the baffle plate and the plugboard are welded through reinforcing rib plates.
4. The connector between a hydraulic mount and a traveling block device of claim 1, wherein: the baffle is provided with a handle.
5. The connector between a hydraulic mount and a traveling block device of claim 1, wherein: and a fork supporting plate is arranged at the top of the vertical plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711290391.5A CN107826964B (en) | 2017-12-08 | 2017-12-08 | Connector between hydraulic support and movable pulley device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711290391.5A CN107826964B (en) | 2017-12-08 | 2017-12-08 | Connector between hydraulic support and movable pulley device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107826964A CN107826964A (en) | 2018-03-23 |
| CN107826964B true CN107826964B (en) | 2023-08-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711290391.5A Active CN107826964B (en) | 2017-12-08 | 2017-12-08 | Connector between hydraulic support and movable pulley device |
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| Country | Link |
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Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2714533A1 (en) * | 1977-04-01 | 1978-10-12 | Ruhrkohle Ag | Mine gallery support withdrawal appts. - has frame mounted on floor member with swinging member carrying withdrawal member |
| DE4100828C1 (en) * | 1991-01-14 | 1992-04-09 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal, De | Double-acting advancing ram mechanism - is for powered supports in deep mining and includes shear bolt safety device |
| CN101812997A (en) * | 2009-02-25 | 2010-08-25 | 三一重型装备有限公司 | Simple hydraulic support |
| CN201980887U (en) * | 2011-04-01 | 2011-09-21 | 山西东华机械有限公司 | Crawler-type hydraulic-bracket crane trolley |
| CN103334782A (en) * | 2013-07-19 | 2013-10-02 | 中国矿业大学 | Movable pulley traction connecting device of inclined roadway winch used for transportation of hydraulic support |
| CN103434920A (en) * | 2013-09-12 | 2013-12-11 | 中国海洋石油总公司 | Lifting point of plate-type traction shell flange |
| CN104442893A (en) * | 2014-06-30 | 2015-03-25 | 诺文科风机(北京)有限公司 | Mining vehicle fast-connecting buckle |
| CN105129598A (en) * | 2015-08-26 | 2015-12-09 | 长治市永华机械有限公司 | Push-pull hook |
| CN204917617U (en) * | 2015-08-03 | 2015-12-30 | 沙尔夫矿山机械（徐州）有限公司 | Single track hangs heavy hydraulic pressure crane beam |
| CN106042797A (en) * | 2016-06-30 | 2016-10-26 | 山东德方液压机械股份有限公司 | Drawbar connecting device |
| CN207738312U (en) * | 2017-12-08 | 2018-08-17 | 徐州中矿大矿山安全技术与装备研发中心 | Connector between hydraulic support and movable pulley device |
-
2017
- 2017-12-08 CN CN201711290391.5A patent/CN107826964B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2714533A1 (en) * | 1977-04-01 | 1978-10-12 | Ruhrkohle Ag | Mine gallery support withdrawal appts. - has frame mounted on floor member with swinging member carrying withdrawal member |
| DE4100828C1 (en) * | 1991-01-14 | 1992-04-09 | Hermann Hemscheidt Maschinenfabrik Gmbh & Co, 5600 Wuppertal, De | Double-acting advancing ram mechanism - is for powered supports in deep mining and includes shear bolt safety device |
| CN101812997A (en) * | 2009-02-25 | 2010-08-25 | 三一重型装备有限公司 | Simple hydraulic support |
| CN201980887U (en) * | 2011-04-01 | 2011-09-21 | 山西东华机械有限公司 | Crawler-type hydraulic-bracket crane trolley |
| CN103334782A (en) * | 2013-07-19 | 2013-10-02 | 中国矿业大学 | Movable pulley traction connecting device of inclined roadway winch used for transportation of hydraulic support |
| CN103434920A (en) * | 2013-09-12 | 2013-12-11 | 中国海洋石油总公司 | Lifting point of plate-type traction shell flange |
| CN104442893A (en) * | 2014-06-30 | 2015-03-25 | 诺文科风机(北京)有限公司 | Mining vehicle fast-connecting buckle |
| CN204917617U (en) * | 2015-08-03 | 2015-12-30 | 沙尔夫矿山机械（徐州）有限公司 | Single track hangs heavy hydraulic pressure crane beam |
| CN105129598A (en) * | 2015-08-26 | 2015-12-09 | 长治市永华机械有限公司 | Push-pull hook |
| CN106042797A (en) * | 2016-06-30 | 2016-10-26 | 山东德方液压机械股份有限公司 | Drawbar connecting device |
| CN207738312U (en) * | 2017-12-08 | 2018-08-17 | 徐州中矿大矿山安全技术与装备研发中心 | Connector between hydraulic support and movable pulley device |
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| Publication number | Publication date |
|---|---|
| CN107826964A (en) | 2018-03-23 |
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