CN110170782B - Bidirectional symmetrical displacement clamping device of automatic welding vehicle - Google Patents
Bidirectional symmetrical displacement clamping device of automatic welding vehicle Download PDFInfo
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- CN110170782B CN110170782B CN201910614651.2A CN201910614651A CN110170782B CN 110170782 B CN110170782 B CN 110170782B CN 201910614651 A CN201910614651 A CN 201910614651A CN 110170782 B CN110170782 B CN 110170782B
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- clamping
- rod
- connecting rod
- shaft seat
- welding vehicle
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0211—Carriages for supporting the welding or cutting element travelling on a guide member, e.g. rail, track
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0276—Carriages for supporting the welding or cutting element for working on or in tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/02—Carriages for supporting the welding or cutting element
- B23K37/0294—Transport carriages or vehicles
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Guiding Agricultural Machines (AREA)
- Resistance Welding (AREA)
Abstract
The invention discloses a bidirectional symmetrical displacement clamping device of an automatic welding vehicle, which comprises a handle lever boosting driving mechanism, an eight-connecting-rod displacement direction conversion transmission mechanism, a connecting rod foundation plate (14), a connecting rod locking chassis (19) and two sets of clamping wheel clamping devices, wherein the eight-connecting-rod displacement direction conversion transmission mechanism is arranged on the handle lever boosting driving mechanism; the handle lever boosting driving mechanism and the connecting rod base plate (14) are fixed on the connecting rod locking chassis (19), the eight-connecting-rod displacement direction conversion transmission mechanism is fixed on the connecting rod base plate (14), the connecting rod base plate (14) is cross-shaped, and each arm is provided with a sliding groove (141); the handle lever boosting driving mechanism is connected with the right arc clamping shaft seat (10), applies driving force to the right arc clamping shaft seat (10), and evenly transmits the driving force to the two sets of clamping wheel clamping devices through the eight-connecting-rod displacement direction conversion transmission mechanism to clamp the welding vehicle. The firm connection between the welding vehicle and the guide rail can be ensured, and the welding vehicle can operate 360 degrees around the pipeline.
Description
Technical Field
The invention relates to the technical field of mechanical structures, in particular to a bidirectional symmetrical displacement clamping device of an automatic welding vehicle.
Background
With the wide application and development of pipeline transportation modes in related fields, people begin to adopt a large amount of high-precision pipeline automatic welding technologies and equipment. When the pipeline welding operation is carried out, the reasonable clamping structure is adopted, so that the position precision between the welding vehicle and the guide rail is favorably improved, and the welding quality of welding seams of various pipeline products is improved. The welding clamping device of the existing automatic pipeline welding vehicle in the current market has the structural characteristics that: one side of the clamping device is provided with a movable sliding block, and the elastic force generated by the compression of the spring is utilized to push the sliding block to reciprocate so as to achieve the purpose of clamping. This solution has the following disadvantages: when the welding vehicle runs to the position below the guide rail for operation, the welding vehicle and the guide rail are easy to loosen due to the change of the stress direction, and a workpiece generates small displacement to cause inaccurate positioning of welding spots, so that the welding quality is not high, the production efficiency is low, and the construction period is influenced. Therefore, for better automatic pipeline welding operation, a clamping device with simple structure, convenient operation and reliable performance is needed, namely the bidirectional symmetrical displacement clamping device of the automatic welding vehicle without spring force.
Disclosure of Invention
The invention aims to provide a bidirectional symmetrical displacement clamping device of an automatic welding vehicle, which solves the problem that the automatic welding vehicle for pipelines is accurately connected with a guide rail during operation, and particularly solves the problem that the welding vehicle and the guide rail are loosened when the automatic welding vehicle for pipelines runs to stations below the pipelines and the guide rail for operation. The clamping device has the advantages of simple structure, convenience in operation and reliable performance, and is a bidirectional symmetrical displacement clamping device of the automatic welding vehicle without spring force.
The purpose of the invention is realized by the following technical scheme:
a bidirectional symmetrical displacement clamping device of an automatic welding vehicle comprises a handle lever boosting driving mechanism, an eight-connecting-rod displacement direction conversion transmission mechanism, a connecting rod foundation plate 14, a connecting rod locking chassis 19 and two sets of clamping wheel clamping devices;
the handle lever boosting driving mechanism and the connecting rod base plate 14 are fixed on the connecting rod locking chassis 19, the eight-connecting-rod displacement direction conversion transmission mechanism is fixed on the connecting rod base plate 14, the connecting rod base plate 14 is cross-shaped, and each arm is provided with a sliding groove 141;
the eight-connecting-rod displacement direction conversion transmission mechanism is formed by alternately hinging four short straight rods 8-1, 8-2, 8-3 and 8-4 and four arc-shaped rods 9-1, 9-2, 9-3 and 9-4 at intervals; the middle part of the first short straight rod 8-1 passes through the corresponding sliding groove 141 and is connected with the right arc clamping shaft seat 10; the middle part of the third short straight rod 8-3 opposite to the first short straight rod 8-1 passes through the corresponding sliding groove 141 to be connected with the left arc clamping shaft seat 12; the second short straight rod 8-2 and the fourth short straight rod 8-4 which are opposite are respectively connected with the sliding blocks 13 arranged in the corresponding sliding grooves 141; the two sets of clamping wheel clamping devices are respectively arranged below the right arc clamping shaft seat 10 and the left arc clamping shaft seat 12;
the handle lever boosting driving mechanism is connected with the right arc clamping shaft seat 10, applies driving force to the right arc clamping shaft seat 10, and evenly transmits the driving force to the two sets of clamping wheel clamping devices through the eight-connecting-rod displacement direction conversion transmission mechanism to clamp the welding vehicle.
The handle lever force-increasing driving mechanism comprises a handle 1, a left corner connecting piece 2, a right corner connecting piece 3, a sliding rod shaft 4, a movable support frame 5, a base 6 and a bending shaft block 7;
the bending shaft block 7 is arranged in the connecting rod locking chassis 19 and connected with the right arc clamping shaft seat 10, the base 6 is fixed on the connecting rod locking chassis 19 and is provided with a sliding hole channel, one end of the sliding rod shaft 4 penetrates through the base 6 and extends into the connecting rod locking chassis 19 to be connected with the bending shaft block 7, and the other end of the sliding rod shaft 4 is hinged with the left corner connecting piece 2 and the right corner connecting piece 3 through the same pin shaft; the left corner connecting piece 2 and the right corner connecting piece 3 are respectively and coaxially hinged with the upper side and the lower side of the movable supporting frame 5 through pin shafts to form a rocker-slider four-bar mechanism; the left corner connecting piece 2 and the right corner connecting piece 3 are fixedly connected with a handle 1.
The slide rod shaft 4 is connected with the bending shaft block 7 through a screw rod nut, and the relative position is adjusted.
The side surface of the connecting rod locking chassis 19 is provided with a Y-shaped handle buckle 18 for clamping the handle 1 in a clamping state.
The clamping wheel clamping device comprises clamping wheels 15 and 16 with grooves, bearings are arranged in the clamping wheels 15 and 16, the bearings are respectively sleeved and fixed on a clamping wheel threaded shaft 17, and the clamping wheel threaded shaft 17 is arranged on the lower surfaces of the right arc clamping shaft seat 10 and the left arc clamping shaft seat 12; the lower surfaces of the right arc clamping shaft seat 10 and the left arc clamping shaft seat 12 are cambered surfaces which are matched with the arc guide rails.
According to the technical scheme provided by the invention, the clamping device for the bidirectional symmetrical displacement of the automatic welding vehicle solves the problem that the automatic pipeline welding vehicle is accurately connected with the guide rail during operation, and particularly solves the problem that the welding vehicle and the guide rail are loosened when the automatic pipeline welding vehicle runs to a station below the pipeline and the guide rail to operate. The clamping device has the advantages of simple structure, convenience in operation and reliable performance, and is a bidirectional symmetrical displacement clamping device of the automatic welding vehicle without spring force. The firm connection between the welding vehicle and the guide rail can be ensured, and the welding vehicle can operate 360 degrees around the pipeline.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a first schematic structural view of a clamping device of an automatic welding vehicle with two-way symmetrical displacement according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram II of a two-way symmetrical displacement clamping device of an automatic welding vehicle according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a connecting rod base plate of the clamping device for bidirectional symmetric displacement of the automatic welding vehicle according to the embodiment of the present invention;
FIG. 4 is a schematic structural view of an eight-link displacement direction switching transmission mechanism of the bidirectional symmetric displacement clamping device of the automatic welding vehicle according to the embodiment of the invention;
FIG. 5 is a schematic structural view of a handle lever force-increasing driving mechanism of a bidirectional symmetrical displacement clamping device of an automatic welding vehicle according to an embodiment of the present invention;
FIG. 6 is a schematic view of a Y-shaped handle buckle structure of the clamping device for bi-directional symmetric displacement of the automatic welding vehicle according to the embodiment of the present invention;
fig. 7 is a schematic structural view of a clamping wheel clamping device of a bidirectional symmetric displacement clamping device of an automatic welding vehicle according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the bidirectional symmetrical displacement clamping device for the automatic welding vehicle comprises a handle lever boosting driving mechanism, an eight-connecting-rod displacement direction conversion transmission mechanism, a connecting rod base plate 14, a connecting rod locking chassis 19 and two sets of clamping wheel clamping devices; in fig. 1, the chassis 19 is an automatic welding vehicle chassis, and there are 4 automatic welding vehicle traveling wheels 20, which are responsible for receiving the torque of the motor and driving the automatic welding vehicle to move along the guide rail.
The handle lever boosting driving mechanism and the connecting rod base plate 14 are fixed on the connecting rod locking chassis 19, and the eight-connecting-rod displacement direction conversion transmission mechanism is fixed on the connecting rod base plate 14.
As shown in fig. 3, the connecting rod base plate 14 is cross-shaped, and each arm is provided with a sliding groove 141; the connecting rod base plate 14 is installed in the connecting rod locking chassis 19 through holes on the left arm and the right arm by screws.
As shown in fig. 4, the eight-bar linkage displacement direction conversion transmission mechanism is a closed eight-bar linkage mechanism formed by alternately and alternately hinging four short straight bars 8-1, 8-2, 8-3 and 8-4 and four arc bars 9-1, 9-2, 9-3 and 9-4 at intervals; the four short straight rods are respectively a first short straight rod 8-1, a second short straight rod 8-2, a third short straight rod 8-3 and a fourth short straight rod 8-4; the four arc-shaped rods are respectively a first arc-shaped rod 9-1, a second arc-shaped rod 9-2, a third arc-shaped rod 9-3 and a fourth arc-shaped rod 9-4; the specific alternate interval hinged connection is that two ends of a first short straight rod 8-1 are respectively hinged with one end of a first arc-shaped rod 9-1 and one end of a fourth arc-shaped rod 9-4, and two ends of a second short straight rod 8-2 are respectively hinged with the other end of the first arc-shaped rod 9-1 and one end of a second arc-shaped rod 9-2; two ends of the third short straight rod 8-3 are respectively hinged with the other end of the second arc-shaped rod 9-2 and one end of the third arc-shaped rod 9-3; two ends of the fourth short straight rod 8-3 are respectively hinged with the other end of the third arc-shaped rod 9-2 and the other end of the third arc-shaped rod 9-4.
The middle part of the first short straight rod 8-1 passes through the corresponding sliding groove 141 and is connected with the right arc clamping shaft seat 10; the middle part of the third short straight rod 8-3 opposite to the first short straight rod 8-1 passes through the corresponding sliding groove 141 to be connected with the left arc clamping shaft seat 12; the second short straight rod 8-2 and the fourth short straight rod 8-4 which are opposite are respectively connected with the sliding blocks 13 arranged in the corresponding sliding grooves 141; the two sets of clamping wheel clamping devices are respectively arranged below the right arc clamping shaft seat 10 and the left arc clamping shaft seat 12.
The handle lever boosting driving mechanism is connected with the right arc clamping shaft seat 10, a driving force is applied to the right arc clamping shaft seat 10, the driving force is evenly transmitted to the two sets of clamping wheel clamping devices through the eight-connecting-rod displacement direction conversion transmission mechanism, and the two sides of the two sets of clamping wheels move reversely to clamp the welding vehicle.
As shown in fig. 5, in this embodiment, the handle-lever boosting driving mechanism includes a handle 1, a left corner connecting piece 2, a right corner connecting piece 3, a slide rod shaft 4, a movable supporting frame 5, a base 6 and a bending shaft block 7; the bending shaft block 7 is arranged in the connecting rod locking chassis 19 and connected with the right arc clamping shaft seat 10, the base 6 is fixed on the connecting rod locking chassis 19 and is provided with a sliding hole channel, one end of the sliding rod shaft 4 penetrates through the base 6 and extends into the connecting rod locking chassis 19 to be connected with the bending shaft block 7, and the other end of the sliding rod shaft 4 is hinged with the left corner connecting piece 2 and the right corner connecting piece 3 through the same pin shaft; the left corner connecting piece 2 and the right corner connecting piece 3 are respectively and coaxially hinged with the upper side and the lower side of the movable supporting frame 5 through pin shafts to form a rocker-slider four-bar mechanism; the left corner connecting piece 2 and the right corner connecting piece 3 are fixedly connected with a handle 1. Here, the rod shaft 4 and the bending shaft block 7 are connected by a screw nut to adjust the relative position. Through adjusting the precession length between the slide rod shaft 4 and the bending shaft block 7, the guide rail clamping device can adapt to different guide rails, can ensure that the clamping wheels can stably clamp the guide rails of welding vehicles with different widths, and has strong adaptability.
Meanwhile, as shown in fig. 6, in this example, a Y-shaped handle catch 18 is provided on the side of the link lock chassis 19 to hold the handle 1 in a clamped state. Thus, the handle 1 is anchored, and the welding trolley and the guide rail are continuously clamped and fixed.
As shown in fig. 7, in this embodiment, the clamping wheel clamping device includes a pair of clamping wheels 15 and 16 with grooves, bearings are respectively installed in the clamping wheels 15 and 16, the bearings are respectively fixed on a clamping wheel threaded shaft 17 in a sleeved manner, and the clamping wheel threaded shaft 17 is installed on the lower surfaces of the right circular arc clamping shaft seat 10 and the left circular arc clamping shaft seat 12; the lower surfaces of the right arc clamping shaft seat 10 and the left arc clamping shaft seat 12 are cambered surfaces which are matched with the arc guide rails. The matching means that the two clamping wheels are arranged along the tangential direction of the arc guide rail and can be in better contact clamping with the arc guide rail.
According to the device, the handle lever force-increasing driving mechanism skillfully utilizes the lever principle, so that the torque can be simply, conveniently and quickly transmitted; during operation, the operating handle 1 is used, the handle 1 takes the movable supporting frame 5 as a rotating fulcrum, the sliding rod shaft 4 is driven to reciprocate along the axis, and then the bending shaft block 7 is driven to reciprocate, so that the eight-connecting-rod displacement direction conversion transmission mechanism is driven to act, the eight-connecting-rod displacement direction conversion transmission mechanism drives the two pairs of clamping wheel sets to perform clamping and loosening actions, bilateral synchronous clamping between the automatic welding vehicle and the guide rail is realized, and prestress clamping is performed only by the accurate size and rigidity of the structural part due to the fact that spring force is not needed. Therefore, the automatic welding vehicle can be always in a firm clamping state during operation, and has better stability. The mechanism applies the lever principle to amplify and transmit manual acting force to the vehicle body clamping device.
The above description is only for the preferred embodiment of the present invention, but the 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 included in the 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. A bidirectional symmetrical displacement clamping device of an automatic welding vehicle is characterized by comprising a handle lever boosting driving mechanism, an eight-connecting-rod displacement direction conversion transmission mechanism, a connecting rod foundation plate (14), a connecting rod locking chassis (19) and two sets of clamping wheel clamping devices;
the handle lever boosting driving mechanism and the connecting rod base plate (14) are fixed on a connecting rod locking chassis (19), the eight-connecting-rod displacement direction conversion transmission mechanism is fixed on a sliding block (13) on the connecting rod base plate (14), the connecting rod base plate (14) is in a cross shape, and the connecting rod base plate (14) is provided with four arms; each arm is provided with a sliding groove (141);
the eight-connecting-rod displacement direction conversion transmission mechanism is formed by alternately hinging four short straight rods (8-1, 8-2, 8-3 and 8-4) and four arc-shaped rods (9-1, 9-2, 9-3 and 9-4) at intervals; the middle part of the first short straight rod (8-1) passes through the corresponding sliding groove (141) and is connected with the right arc clamping shaft seat (10); the middle part of a third short straight rod (8-3) opposite to the first short straight rod (8-1) passes through a corresponding sliding groove (141) to be connected with a left arc clamping shaft seat (12); the second short straight rod (8-2) and the fourth short straight rod (8-4) which are opposite are respectively connected with a sliding block (13) arranged in the corresponding sliding groove (141); the two sets of clamping wheel clamping devices are respectively arranged below the right arc clamping shaft seat (10) and the left arc clamping shaft seat (12);
the handle lever boosting driving mechanism is connected with the right arc clamping shaft seat (10), applies driving force to the right arc clamping shaft seat (10), and evenly transmits the driving force to the two sets of clamping wheel clamping devices through the eight-connecting-rod displacement direction conversion transmission mechanism to clamp the welding vehicle;
the connecting rod locking chassis (19) is provided with four automatic welding vehicle travelling wheels (20); the clamping wheel clamping device comprises clamping wheels (15 and 16) with grooves, bearings are mounted in the clamping wheels (15 and 16), the bearings are respectively sleeved and fixed on clamping wheel threaded shafts (17), and the clamping wheel threaded shafts (17) are mounted on the lower surfaces of a right arc clamping shaft seat (10) and a left arc clamping shaft seat (12); the lower surfaces of the right arc clamping shaft seat (10) and the left arc clamping shaft seat (12) are cambered surfaces which are matched with the arc guide rails.
2. The clamping device for the bidirectional symmetrical displacement of the automatic welding vehicle as claimed in claim 1, wherein the handle lever force-increasing driving mechanism comprises a handle (1), a left corner connecting piece (2), a right corner connecting piece (3), a slide rod shaft (4), a movable supporting frame (5), a base (6) and a bending shaft block (7);
the bending shaft block (7) is arranged in the connecting rod locking chassis (19) and connected with the right arc clamping shaft seat (10), the base (6) is fixed on the connecting rod locking chassis (19), the base (6) is provided with a sliding hole channel, one end of the sliding rod shaft (4) penetrates through the base (6) and extends into the connecting rod locking chassis (19) to be connected with the bending shaft block (7), and the other end of the sliding rod shaft (4) is hinged with the left corner connecting piece (2) and the right corner connecting piece (3) through the same pin shaft; the left corner connecting piece (2) and the right corner connecting piece (3) are respectively and coaxially hinged with the movable supporting frame (5) at the upper side and the lower side through pin shafts to form a rocker-slider four-bar mechanism; the left corner connecting piece (2) and the right corner connecting piece (3) are fixedly connected with the handle (1).
3. The clamping device for the bidirectional symmetric displacement of the automatic welding vehicle as claimed in claim 2, characterized in that a Y-shaped handle buckle (18) is arranged on the side surface of the connecting rod locking chassis (19) to clamp the handle (1) in a clamping state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910614651.2A CN110170782B (en) | 2019-07-09 | 2019-07-09 | Bidirectional symmetrical displacement clamping device of automatic welding vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910614651.2A CN110170782B (en) | 2019-07-09 | 2019-07-09 | Bidirectional symmetrical displacement clamping device of automatic welding vehicle |
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| Publication Number | Publication Date |
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| CN110170782A CN110170782A (en) | 2019-08-27 |
| CN110170782B true CN110170782B (en) | 2021-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910614651.2A Active CN110170782B (en) | 2019-07-09 | 2019-07-09 | Bidirectional symmetrical displacement clamping device of automatic welding vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114102026B (en) * | 2021-12-20 | 2023-06-09 | 北京石油化工学院 | Centering device for butt welding outside anode furnace |
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| DE3610313A1 (en) * | 1985-03-29 | 1986-10-02 | Mitsubishi Denki K.K., Tokio/Tokyo | AUTOMATIC WELDING DEVICE WITH A DEVICE FOR PREVENTING A DRIVE GAME OF THE WELDING TORCH CAR |
| CN201342564Y (en) * | 2009-01-23 | 2009-11-11 | 北京石油化工学院 | Welding trolley with two-way locking mechanism |
| CN201940836U (en) * | 2011-03-10 | 2011-08-24 | 上海三一精机有限公司 | Bidirectional centering clamping device |
| CN106475932A (en) * | 2016-10-13 | 2017-03-08 | 安徽江淮汽车集团股份有限公司 | A kind of handle universal adjustment type elbow folder |
| CN107499921A (en) * | 2017-08-16 | 2017-12-22 | 中国矿业大学 | A kind of rail type mobile workbench |
| CN207141045U (en) * | 2017-09-06 | 2018-03-27 | 南京工程学院 | A kind of brakes for the variable automobile of wheelbase |
| CN208051463U (en) * | 2018-04-06 | 2018-11-06 | 叶炜婷 | A kind of clamp system for sword toy |
| CN109421764A (en) * | 2017-08-20 | 2019-03-05 | 张启明 | A kind of guide wheel rail vehicle and track |
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2019
- 2019-07-09 CN CN201910614651.2A patent/CN110170782B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3610313A1 (en) * | 1985-03-29 | 1986-10-02 | Mitsubishi Denki K.K., Tokio/Tokyo | AUTOMATIC WELDING DEVICE WITH A DEVICE FOR PREVENTING A DRIVE GAME OF THE WELDING TORCH CAR |
| CN201342564Y (en) * | 2009-01-23 | 2009-11-11 | 北京石油化工学院 | Welding trolley with two-way locking mechanism |
| CN201940836U (en) * | 2011-03-10 | 2011-08-24 | 上海三一精机有限公司 | Bidirectional centering clamping device |
| CN106475932A (en) * | 2016-10-13 | 2017-03-08 | 安徽江淮汽车集团股份有限公司 | A kind of handle universal adjustment type elbow folder |
| CN107499921A (en) * | 2017-08-16 | 2017-12-22 | 中国矿业大学 | A kind of rail type mobile workbench |
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| CN110170782A (en) | 2019-08-27 |
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