CN113845035B - Locking mechanism and crane front protection device - Google Patents
Locking mechanism and crane front protection device Download PDFInfo
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- CN113845035B CN113845035B CN202111041184.2A CN202111041184A CN113845035B CN 113845035 B CN113845035 B CN 113845035B CN 202111041184 A CN202111041184 A CN 202111041184A CN 113845035 B CN113845035 B CN 113845035B
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- hole
- fixedly connected
- locking
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- 230000007246 mechanism Effects 0.000 title claims abstract description 20
- 230000006835 compression Effects 0.000 claims abstract description 14
- 238000007906 compression Methods 0.000 claims abstract description 14
- 238000005452 bending Methods 0.000 claims description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 230000007935 neutral effect Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 206010044565 Tremor Diseases 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C15/00—Safety gear
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
- B66C9/18—Travelling gear incorporated in or fitted to trolleys or cranes with means for locking trolleys or cranes to runways or tracks to prevent inadvertent movements
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a locking mechanism and a crane front protection device, and belongs to the field of wheeled lifting machinery. The locking mechanism comprises a supporting frame, a fixed bracket and a compression bar assembly; the compression bar assembly comprises a bottom plate and a pressing-disengaging structure arranged on the bottom plate, the bottom plate is welded on two sides of the fixed support, the support frame is rotationally connected with the fixed support through a pin shaft, elastic protrusions are arranged on the support frame, an upper locking hole and a lower locking hole are formed in two sides of the fixed support frame, the upper locking hole, the lower locking hole and the elastic protrusions are matched without errors, an oblong hole which corresponds to the upper locking hole and the lower locking hole is formed in the bottom plate, and the pressing-disengaging structure is used for controlling rotation and locking of the support frame through pressing-disengaging the elastic protrusions in the upper locking hole or the lower locking hole. The front protection device solves the technical problems that in the prior art, the front protection device is complex in operation, time-consuming and labor-consuming when being turned over and used, the disassembly and assembly requirements are high, the safety is poor, and meanwhile, the reliability and the service life of the front protection device are seriously affected by the low installation precision.
Description
Technical Field
The invention relates to a locking mechanism and a crane front protection device, and belongs to the field of wheeled lifting machinery.
Background
The wheel crane not only has good lifting performance, but also has good running performance and safety performance, and in order to protect the safety of passengers and effectively avoid the underrun phenomenon of the vehicle when collision accidents happen, the wheel crane is additionally provided with a special front protection device.
The existing front protection device controls the overturning of the front protection device by manually changing the installation position of the pin shaft, so that the trafficability and the safety of the wheeled crane are improved. Because of the requirements of safety performance such as strength and rigidity, the front protection device adopting the box type design has the advantages of good performance, but large self weight, and the following problems exist in the process of overturning the front protection device: 1. when the front protection device is turned over, one person needs to lift the front protection device, the other person can plug the pin shaft on the fixed support, when the pin shaft is pulled out, the lifter also needs to turn over the cross beam and repeatedly find a certain fixed position and then insert the pin shaft by the other person to fix the front protection device, in addition, the plug pin shaft also needs to disassemble and assemble the locking buckle on the pin shaft, the operation is complex, time and labor are wasted, and labor cost is increased intangibly. 2. In the process of installing and dismantling the pin shafts, two people are required to be matched in a coordinated manner, a lifter needs to lift the cross beam to a certain fixed position by experience and maintain for a plurality of seconds, the pin shafts can be inserted and fixed by another person, and once the lifter is unstable in operation, the pin shafts are difficult to align with the hole sites, so that the pin shafts are difficult to insert; if the lifter is in error in the operation process, the beam is easy to slide down and swing continuously, the workers for plugging and unplugging the pin shaft are easy to be injured, and the safety is poor. 3. The round pin axle is manual installation, and the fit clearance of axle, hole is too little easily to lead to the round pin axle to be difficult to plug, therefore the diameter of round pin axle and installation aperture have the design allowance of several millimeters, and this can lead to front guard's mounted position to have the deviation and enlarge through the fixed bolster of both sides with the theoretical value, and the installation accuracy is lower, simultaneously, great installation clearance can lead to the swing and the tremble effect of crossbeam in the course of traveling, has reduced front guard's reliability and life.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a locking mechanism and a front protection device of a crane, which solve the problems that the front protection device in the prior art is complex in operation, time-consuming and labor-consuming when being turned and used, has higher disassembly and assembly requirements and poor safety, and meanwhile, the reliability and the service life of the front protection device are seriously influenced by lower installation precision.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme:
in one aspect, the invention provides a locking mechanism, which comprises a support frame, a fixed bracket and a compression bar assembly; the compression bar assembly comprises a bottom plate and a pressing-disengaging structure arranged on the bottom plate, the bottom plate is fixedly connected to two sides of the fixing support, the support frame is connected with the fixing support in a rotating mode through a pin shaft, elastic protrusions are arranged on the support frame, an upper locking hole and a lower locking hole which enable the elastic protrusions to pass through are formed in two sides of the fixing support frame, the upper locking hole, the lower locking hole and the elastic protrusions are matched with each other without errors, an oblong hole which corresponds to the upper locking hole and the lower locking hole is formed in the bottom plate, the stroke of the elastic protrusions is limited, and the pressing-disengaging structure is used for pressing the elastic protrusions in the upper locking hole or the lower locking hole to control rotation and locking of the support frame.
Further, the pressing and disengaging structure comprises a base, a tension spring, a handle, a cross rod transversely fixedly arranged on the handle and a pressing rod longitudinally fixedly arranged on the handle; the base is fixedly connected with the bottom plate, the handle is rotationally connected with the base through the rotating shaft, the lug plate is fixedly arranged on the bottom plate, one end of the tension spring is sleeved on the cross rod, the other end of the tension spring is connected with the lug plate in a buckling mode, and the compression rod is pressed into the oblong hole under the elastic action of the tension spring.
Further, the fixed bracket comprises a left side plate, a right side plate and a frame connecting plate; one ends of the left side plate and the right side plate are fixedly connected with the frame connecting plate respectively, the left side plate and the right side plate are fixedly connected through a neutral plate, and the upper locking hole and the lower locking hole are correspondingly formed in the left side plate and the right side plate respectively.
Furthermore, pin shaft mounting holes through which pin shafts can pass are correspondingly formed in the left side plate, the right side plate and the bottom plate.
Further, the support frame comprises a vertical plate, an upper bending plate, a bending plate connecting plate, a lower bending plate and a cross beam connecting plate; one end of the upper bending plate is fixedly connected with one end of the lower bending plate through a bending plate connecting plate, and the other end of the upper bending plate is fixedly connected with the other end of the lower bending plate through a cross beam connecting plate; the upper bending plate is fixedly connected with the two sides of the lower bending plate through vertical plates.
Further, the sleeve is further arranged, a flitch is fixedly arranged on the inner side of the vertical plate, a pin shaft mounting hole corresponding to the vertical plate is formed in one end of the flitch, and a through hole corresponding to the vertical plate is formed in the other end of the flitch, so that the sleeve can be fixed.
Further, the elastic bulge comprises a pressure spring and a locking shaft; one end of the pressure spring is fixedly connected with the sleeve, the other end of the pressure spring is fixedly connected with the locking shaft, and the locking shaft keeps a part protruding out of the surface of the vertical plate under the action of elasticity of the pressure spring.
Further, the apertures of the upper locking hole and the lower locking hole are larger than the semicircular diameter of the oblong hole.
On the other hand, the invention also provides a front protection device of the crane, which comprises a cross beam, a crane frame and the locking mechanism; the beam is detachably connected with a beam connecting plate in the locking mechanism, and the crane frame is detachably connected with a frame connecting plate in the locking mechanism.
Further, the cross beam comprises a groove-shaped steel plate and a cross plate; the transverse plate is fixedly connected with the notch of the groove-shaped steel plate, and a threaded mounting hole which is detachably connected with the transverse beam connecting plate is formed in the transverse plate.
Compared with the prior art, the invention has the following beneficial effects:
the support frame is provided with the elastic bulge, the two sides of the fixed support are provided with the upper locking hole and the lower locking hole which can enable the elastic bulge to pass through, the elastic bulge passes through the upper locking hole or the lower locking hole to realize locking of the cross beam, the upper locking hole, the lower locking hole and the elastic bulge are matched with no error, the installation precision of the front protection device can be remarkably improved, the swinging and the trembling of the cross beam caused by a large assembly gap in the driving process are avoided, the reliability and the service life of the front protection device are effectively improved, the bottom plate is provided with the oblong holes which are correspondingly arranged with the upper locking hole and the lower locking hole, the stroke of the elastic bulge can be limited, the elastic bulge is prevented from protruding out of the oblong holes, the damage to the elastic bulge caused by external factors is avoided, the reliability and the service life of the front protection device are further improved, the press-release structure controls the rotation and the locking of the support frame through the elastic bulge in the upper locking hole or the lower locking hole in a single operation mode to replace the multi-person matched operation, the labor cost is effectively reduced, the operation is simple in a single operation mode, and the safety hidden danger is not easy to generate.
Drawings
FIG. 1 is a schematic structural view of a front protecting device of a crane according to an embodiment of the present invention;
FIG. 2 is a side view of a front guard of a crane according to an embodiment of the invention;
FIG. 3 is a schematic view of the structure of the fixing bracket in FIG. 1;
FIG. 4 is a schematic view of the structure of the support frame in FIG. 1;
FIG. 5 is a schematic view of the press bar assembly of FIG. 1;
FIG. 6 is a schematic view of the beam of FIG. 1;
in the figure: 1. a crane frame; 2. a fixed bracket; 3. a compression bar assembly; 4. a support frame; 5. a pin shaft; 6. a cross beam; 7. a frame connecting plate; 8. a right side plate; 9. a locking hole is formed; 10. a pin shaft mounting hole; 11. a lower locking hole; 12. a neutral plate; 13. a left side plate; 14. a vertical plate; 15. pasting a board; 16. a bent plate connecting plate; 17. an upper bending plate; 18. a lower bending plate; 19. a pressure spring; 20. a sleeve; 21. a locking shaft; 22. a beam connecting plate; 23. an oblong hole; 24. a bottom plate; 25. a base; 26. a compression bar; 27. a handle; 28. a cross bar; 29. a tension spring; 30. ear plates; 31. a groove-shaped steel plate; 32. and a transverse plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present invention, and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Embodiment one:
as shown in fig. 1, 3 and 5, a locking mechanism comprises a supporting frame 4, a fixed bracket 2 and a compression bar assembly 3;
the support frame 4 rotates through round pin axle 5 and fixed bolster 2 to be connected, depression bar subassembly 3 includes bottom plate 24 and locates the pressure on the bottom plate 24 and take off the structure, bottom plate 24 welds in the both sides of fixed bolster 2, be equipped with the elastic bulge on the support frame 4, the both sides of fixed bolster 2 have been seted up and can make the elastic bulge go through last locking hole 9 and lower locking hole 11, the elastic bulge passes last locking hole 9 or lower locking hole 11 and realizes the locking of crossbeam 6, and go up locking hole 9, lower locking hole 11 and elastic bulge cooperation error-free, can show the installation accuracy that improves front guard, avoided going in-process because of great assembly clearance leads to the swing and the tremble of crossbeam 6, effectively improved front guard's reliability and life, set up on the bottom plate 24 with last locking hole 9 and lower locking hole 11 correspond the long circular hole 23 that set up, can carry out the stroke spacing to the elastic bulge, ensure that the elastic bulge is not protruding in long circular hole 23, avoid factor to cause the damage to the elastic bulge, further improve front guard's reliability and life, it is easy to take off the structure and take off the control mode and take off the rocking motion of crossbeam 6 to produce the manual operation easily, the safety risk of operation is reduced with the manual operation easily, the safety risk is reduced in the mode of carrying out the operation is easy to the manual operation with the locking hole 4.
As shown in fig. 1 and 5, the press-off structure comprises a base 25, a tension spring 29, a handle 27, a cross rod 28 transversely fixed on the handle 27 and a press rod 26 longitudinally fixed on the handle 27; the base 25 is welded with the outside of the bottom plate 24, the handle 27 is rotatably connected with the base 25 through a rotating shaft, the two sides of the base 25 are provided with the lug plates 30, the lug plates 30 are welded with the bottom plate 24, one end of the tension spring 29 is sleeved on the cross rod 28, the other end of the tension spring 29 is in buckling connection with the lug plates 30, and the compression rod 26 is kept to be pressed into the oblong hole 23 under the elastic force of the tension spring 29 so as to enable the support frame 4 to be unlocked. Specifically, in the working state, the handle 27 is pushed to the upper end, the compression bar 26 extrudes the elastic bulge under the elastic action of the tension spring 29, so that the elastic bulge is separated from the upper locking hole 9, the support frame 4 can freely rotate around the pin shaft 5, when the elastic bulge rotates to the position of the lower locking hole 11 along with the support frame 4, the elastic bulge is sprung, the support frame 4 is fixed with the fixed support frame 2 and does not rotate any more, and at the moment, the cross beam 6 connected with the support frame 4 is in the working state, so that the safety of the wheeled crane in running is improved; when the wheel crane is in a retracted state, the handle 27 is pushed to the lower end, the compression bar 26 extrudes the elastic bulge under the elastic action of the tension spring 29, so that the elastic bulge is separated from the lower locking hole 11, the support frame 4 can freely rotate around the pin shaft 5, when the elastic bulge rotates along with the support frame 4 to the position of the upper locking hole 9, the elastic bulge is sprung, the support frame 4 is fixed with the fixed support frame 2 and does not rotate any more, and at the moment, the cross beam 6 connected with the support frame 4 is in the retracted state, so that the trafficability of the wheel crane in complex road running is enhanced.
As shown in fig. 1 and 3, the fixed bracket 2 includes a left side plate 13, a right side plate 8, and a frame connecting plate 7; one ends of the left side plate 13 and the right side plate 8 are respectively welded with the frame connecting plate 7, the left side plate 13 and the right side plate 8 are welded through the neutral plate 12 so as to strengthen the connection strength of the left side plate 13 and the right side plate 8, the upper locking hole 9 and the lower locking hole 11 are respectively correspondingly arranged on the left side plate 13 and the right side plate 8, the left side plate 13, the right side plate 8 and the bottom plate 24 are correspondingly provided with pin shaft mounting holes 10 which can enable the pin shaft 5 to pass through, and the pin shaft mounting holes 10 are positioned between the upper locking hole 9 and the lower locking hole 11.
As shown in fig. 1 and 4, the support frame 4 includes a riser 14, an upper bent plate 17, a bent plate connecting plate 16, a lower bent plate 18, a beam connecting plate 22, and a sleeve 20; one end of the upper bending plate 17 and one end of the lower bending plate 18 are welded through a bending plate connecting plate 16, and the other end of the upper bending plate and the lower bending plate are welded through a beam connecting plate 22; the two sides of the upper bending plate 17 and the lower bending plate 18 are fixedly connected through the vertical plate 14 respectively, the inner side of the vertical plate 14 is fixedly provided with the flitch 15 so as to enhance the mechanical strength of the vertical plate 14, one end of the flitch 15 is provided with the pin shaft mounting hole 10 corresponding to the vertical plate 14, the other end is provided with the through hole corresponding to the vertical plate 14, and the two ends of the sleeve 20 are clamped with the through holes.
The elastic bulge comprises a pressure spring 19 and a locking shaft 21; one end of the pressure spring 19 is fixedly connected with the sleeve 20, the other end of the pressure spring is fixedly connected with the locking shaft 21, and the locking shaft 21 keeps a part protruding out of the surface of the vertical plate 14 under the action of the elasticity of the pressure spring 19, specifically, the locking shaft 21 passes through the upper locking hole 9 or the lower locking hole 11 but does not protrude out of the oblong hole 23.
In one embodiment, the apertures of the upper locking hole 9 and the lower locking hole 11 are larger than the semi-circular diameter of the oblong hole 23 to ensure that the locking shaft 21 does not protrude out of the oblong hole 23.
Embodiment two:
as shown in fig. 2, 4 and 6, the embodiment of the present invention further provides a front protection device of a crane, which includes a cross beam 6, a crane frame 1 and the locking mechanism described in the first embodiment; the cross beam 6 comprises a groove-shaped steel plate 31 and a cross plate 32, the cross plate 32 is correspondingly welded with the notch of the groove-shaped steel plate 31, a threaded mounting hole corresponding to the cross beam connecting plate 22 in the locking mechanism is formed in the cross plate 32, a bolt penetrates through the threaded mounting hole to detachably connect the cross plate 32 with the cross beam connecting plate 22, a threaded mounting hole corresponding to the crane frame 1 is formed in the frame connecting plate 7 in the locking mechanism, and the bolt penetrates through the threaded mounting hole to detachably connect the frame connecting plate 7 with the crane frame 1.
In one embodiment, the cross plate 32 is welded to the cross beam attachment plate 22 and the frame attachment plate 7 is welded to the crane frame 1.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present invention, and such modifications and variations should also be regarded as being within the scope of the invention.
Claims (5)
1. The locking mechanism is characterized by comprising a support frame (4), a fixed support (2) and a compression bar assembly (3); the compression bar assembly (3) comprises a bottom plate (24) and a pressing-off structure arranged on the bottom plate (24), the bottom plate (24) is fixedly connected to two sides of the fixed support (2), the support frame (4) is rotationally connected with the fixed support (2) through a pin shaft (5), elastic bulges are arranged on the support frame (4), an upper locking hole (9) and a lower locking hole (11) which can enable the elastic bulges to pass through are formed in two sides of the fixed support (2), the upper locking hole (9) and the lower locking hole (11) are matched with the elastic bulges, an oblong hole (23) which is arranged corresponding to the upper locking hole (9) and the lower locking hole (11) is formed in the bottom plate (24) so as to limit the stroke of the elastic bulges, and the pressing-off structure can be used for controlling the rotation and locking of the support frame (4) through the elastic bulges in the upper locking hole (9) or the lower locking hole (11);
the pressing-disengaging structure comprises a base (25), a tension spring (29), a handle (27), a cross rod (28) transversely fixedly arranged on the handle (27) and a pressing rod (26) longitudinally fixedly arranged on the handle (27); the base (25) is fixedly connected with the base (24), the handle (27) is rotationally connected with the base (25) through a rotating shaft, an ear plate (30) is fixedly arranged on the base (24), one end of the tension spring (29) is sleeved on the cross rod (28), the other end of the tension spring is in buckling connection with the ear plate (30), and the compression rod (26) is pressed into the oblong hole (23) under the elastic force of the tension spring (29);
the fixed bracket (2) comprises a left side plate (13), a right side plate (8) and a frame connecting plate (7); one ends of the left side plate (13) and the right side plate (8) are fixedly connected with the frame connecting plate (7) respectively, the left side plate (13) and the right side plate (8) are fixedly connected through the neutral plates (14) and (12), and the upper locking hole (9) and the lower locking hole (11) are correspondingly arranged on the left side plate (13) and the right side plate (8) respectively;
the support frame (4) comprises a vertical plate (14), an upper bending plate (17), a bending plate connecting plate (16), a lower bending plate (18) and a beam connecting plate (22); one end of the upper bending plate (17) is fixedly connected with one end of the lower bending plate (18) through a bending plate connecting plate (16), and the other end of the upper bending plate is fixedly connected with the other end of the lower bending plate through a beam connecting plate (22); the two sides of the upper bending plate (17) and the lower bending plate (18) are fixedly connected through the vertical plate (14);
the novel vertical plate comprises a vertical plate (14), and is characterized by further comprising a sleeve (20), wherein a flitch (15) is fixedly arranged on the inner side of the vertical plate (14), a pin shaft mounting hole (10) corresponding to the vertical plate (14) is formed in one end of the flitch (15), and a through hole corresponding to the vertical plate (14) is formed in the other end of the flitch (15) so as to fix the sleeve (20);
the elastic bulge comprises a pressure spring (19) and a locking shaft (21); one end of the pressure spring (19) is fixedly connected with the sleeve (20), the other end of the pressure spring is fixedly connected with the locking shaft (21), and the locking shaft (21) keeps a part protruding out of the surface of the vertical plate (14) under the action of elasticity of the pressure spring (19).
2. The locking mechanism according to claim 1, wherein the left side plate (13), the right side plate (8) and the bottom plate (24) are further provided with pin mounting holes (10) through which the pins (5) can pass.
3. Locking mechanism according to claim 1, characterized in that the apertures of the upper (9) and lower (11) locking holes are larger than the semi-circular diameter of the oblong hole (23).
4. A crane front guard, characterized by comprising a cross beam (6), a crane carriage (1) and a locking mechanism according to any of claims 1-3; the beam (6) is detachably connected with a beam connecting plate (22) in the locking mechanism, and the crane frame (1) is detachably connected with a frame connecting plate (7) in the locking mechanism.
5. The crane front guard according to claim 4, characterized in that the cross beam (6) comprises a trough steel plate (31) and a cross plate (32); the transverse plate (32) is fixedly connected with the notch of the groove-shaped steel plate (31), and a threaded mounting hole for detachable connection with the transverse beam connecting plate (22) is formed in the transverse plate (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111041184.2A CN113845035B (en) | 2021-09-07 | 2021-09-07 | Locking mechanism and crane front protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111041184.2A CN113845035B (en) | 2021-09-07 | 2021-09-07 | Locking mechanism and crane front protection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113845035A CN113845035A (en) | 2021-12-28 |
| CN113845035B true CN113845035B (en) | 2024-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111041184.2A Active CN113845035B (en) | 2021-09-07 | 2021-09-07 | Locking mechanism and crane front protection device |
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| Country | Link |
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| CN (1) | CN113845035B (en) |
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| CN209845656U (en) * | 2019-01-28 | 2019-12-27 | 吴志恒 | Industrial shovel and conversion connecting assembly thereof |
| CN212324659U (en) * | 2020-05-27 | 2021-01-12 | 唐山福起制锹有限公司 | Welding blocking hoe |
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2021
- 2021-09-07 CN CN202111041184.2A patent/CN113845035B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1132259A2 (en) * | 2000-03-09 | 2001-09-12 | Franz Xaver Meiller Fahrzeug- und Maschinenfabrik-GmbH & Co KG | Foldable underride barrier |
| JP2010264811A (en) * | 2009-05-13 | 2010-11-25 | Isuzu Shatai Kk | Manual type movable rear bumper |
| CN203958059U (en) * | 2014-06-06 | 2014-11-26 | 安徽星马专用汽车有限公司 | A kind of upset guard rail and vehicle |
| CN204279321U (en) * | 2014-10-16 | 2015-04-22 | 北汽福田汽车股份有限公司 | The protecting device for rear lower part of vehicle and vehicle |
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| CN106671919A (en) * | 2016-12-30 | 2017-05-17 | 北奔重型汽车集团有限公司 | Pneumatic front protection device for vehicle |
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| CN209845656U (en) * | 2019-01-28 | 2019-12-27 | 吴志恒 | Industrial shovel and conversion connecting assembly thereof |
| CN212324659U (en) * | 2020-05-27 | 2021-01-12 | 唐山福起制锹有限公司 | Welding blocking hoe |
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| Publication number | Publication date |
|---|---|
| CN113845035A (en) | 2021-12-28 |
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