CN216336241U - Crane safe to use - Google Patents
Crane safe to use Download PDFInfo
- Publication number
- CN216336241U CN216336241U CN202120863759.8U CN202120863759U CN216336241U CN 216336241 U CN216336241 U CN 216336241U CN 202120863759 U CN202120863759 U CN 202120863759U CN 216336241 U CN216336241 U CN 216336241U
- Authority
- CN
- China
- Prior art keywords
- hanger
- frame
- oil cylinder
- holes
- rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model relates to a hoisting machine. The purpose is to provide an improvement of a crane, the crane can effectively limit the weight of cargo hoisting, and has the characteristics of safe use and simple structure. The technical scheme is as follows: a safe-to-use crane comprises a frame with traveling wheels, a hanger supported by the frame and an oil cylinder, wherein two ends of the oil cylinder are respectively hinged with the hanger and the frame to push the hanger; a hanging rod is slidably inserted and embedded in the inner cavity of the hanging bracket, and a lifting hook is installed at one end of the hanging rod which is suspended outside the hanging bracket; the hanger rod can be in one-to-one inserting fit with a plurality of positioning holes arranged on the wall part of the hanger frame so as to adjust the overhanging length of the hanger rod; the method is characterized in that: hinge holes which are the same as the positioning holes in number and can be hinged with the top end of the oil cylinder are formed in the hanging bracket, and the hinge holes are arranged along the length direction of the hanging bracket; the limit moment of force formed between the hinge holes and the pivot is equal to the limit moment of resistance when the suspension rods are in one-to-one insertion fit with the corresponding positioning holes.
Description
Technical Field
The utility model relates to hoisting machinery, in particular to a movable crane which is safe to use.
Background
The movable crane is a small hoisting device widely applied, and generally adopts a frame with traveling wheels, a hanger supported by the frame and an oil cylinder for pushing the hanger; a hanging rod is inserted and embedded in the inner cavity of the hanging bracket, and the hanging rod can slide along the length direction of the hanging bracket according to the requirement so as to adjust the overhanging length of the hanging rod outside the hanging bracket; after the hanger rod extends, a positioning bolt is required to be inserted into a selected positioning hole for locking, and a hanging hook is hung at the overhanging end of the hanger rod outside the hanger frame through a hanging chain; in order to ensure the hoisting safety, when the goods exceed the hoisting limit, the safety valve on the oil cylinder acts, so that the hanger cannot be lifted.
The machine has the following defects: the hinged positions of the two ends of the oil cylinder, the hanger and the rack (wherein the bottom end of the oil cylinder is fixed on the rack through the upright post) are fixed; and the hoisting limit after the extension is marked on the hanger (as shown in the figure, the four positioning hole parts of 1, 2, 3 and 4 of the hanger are marked with 500kg, 1000kg, 1500kg and 2000kg in sequence), which shows the bearing limit after the hanger rod is extended to the positioning hole parts in a sliding way and locked. In the actual use process, users usually do not pay attention to the marks, and want to certainly use the extended boom to hoist the maximum limit of goods (at this time, the safety valve on the oil cylinder does not reach the limit standard), so that accidents that people are injured due to overloading damage of the hanger or the boom may occur.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the background technology and provides an improvement of a crane, which can effectively limit the weight of hoisting goods and has the characteristics of safe use and simple structure.
The technical scheme provided by the utility model is as follows:
a safe-to-use crane comprises a frame with traveling wheels, a hanger supported by the frame and an oil cylinder, wherein two ends of the oil cylinder are respectively hinged with the hanger and the frame to push the hanger; a hanging rod is slidably inserted and embedded in the inner cavity of the hanging bracket, and a lifting hook is installed at one end of the hanging rod which is suspended outside the hanging bracket; the hanger rod can be in one-to-one inserting fit with a plurality of positioning holes arranged on the wall part of the hanger frame so as to adjust the overhanging length of the hanger rod;
the method is characterized in that: hinge holes which are the same as the positioning holes in number and can be hinged with the top end of the oil cylinder are formed in the hanging bracket, and the hinge holes are arranged along the length direction of the hanging bracket; the limited dynamic moment formed between the hinge holes and the pivot is equal to the limited resisting moment when the suspension rods are in one-to-one insertion fit with the corresponding positioning holes; and when the oil cylinder is hinged with different hinge holes and reaches the limit moment, the oil pressure in the oil cylinder reaches the pressure limiting critical standard of the safety valve.
The top end of the oil cylinder is hinged with different hinge holes on the hanger through hinge pins.
The hanger rod is respectively inserted and matched with different positioning holes on the hanger frame through the positioning bolts.
The hinge holes are arranged at the bottom end of the hanger and are arranged along the length direction of the hanger.
The utility model has the beneficial effects that: when the lifting rod is used, the lifting weight of the lifting rod can be within a quota range only by synchronously adjusting the positioning holes and the hinge holes which are in one-to-one correspondence according to requirements (namely after the elongation is adjusted by the lifting frame and the positioning holes are determined, the corresponding hinge holes are also adopted for the oil pump in a hinged mode), so that the lifting rod is not damaged, the accident potential that people are injured by a damaged object is eliminated, and the use safety is ensured; the crane also has the characteristic of simple structure.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention (hanger is not extended).
Fig. 2 is a second schematic perspective view (extended state) of the hanger according to the embodiment of the present invention.
Fig. 3 is a schematic perspective view of a conventional crane.
Detailed Description
The following further description is made with reference to the embodiments shown in the drawings.
The existing crane (see fig. 3) is as shown: the frame consists of a chassis 2 and a stand column 3; the lower end of the chassis is fixed with a plurality of walking wheels 1, the hanger is supported on the frame through the upright post, and two ends of the oil cylinder 4 are respectively hinged with the hanger 7 and the upright post (the hinged positions of the oil cylinder at two ends, the hanger and the upright post are fixed) so as to push the hanger to lift. A suspender 9 is inserted and embedded in the inner cavity of the hanger, and the suspender 9 can slide along the length direction of the hanger; one end of the suspender is also provided with a positioning hole, and the suspender can be respectively inserted and matched with different positioning holes on the hanger 7 through a positioning bolt; the positioning holes on the hanger are marked with extended hoisting limits (as shown in fig. 3, the four positioning hole parts of a, b, c and d of the hanger are marked with characters of 500kg, 1000kg, 1500kg and 2000kg in sequence), which respectively show the hoisting limits after the positioning bolts 8 are inserted into the positioning holes after the hanger rod is extended in a sliding manner. The hanger rod can slide according to the requirement so as to adjust the length of the hanger rod outside, and after the hanger rod slides and extends, a positioning bolt needs to be inserted and embedded into a selected positioning hole. The hanger 6 is hung from the suspended end of the boom by a hoist chain (as can be seen from the figure, when the positioning holes at the positions a, b, c and d of the thicker boom are used, the hanger is hung from the hoist chain at the position A, B, C, D respectively).
As can be seen from the figure: the ratio of the length of AE (point E is a fulcrum) to the length of DE (point DE) is usually not two to one (four to one is impossible at all), so if a positioning hole part a is adopted to insert and embed a positioning bolt for positioning and locking, a user carelessly and carelessly lifts 2000kg goods at the position A, the oil pressure in the oil cylinder at the moment is far from reaching the pressure limiting standard value of the safety valve, and the starting standard of the safety valve is not reached; at the moment, the pressure of the hanger is greatly exceeded, and the accidents of damaging objects and injuring people are very easy to happen.
The improvement of the utility model is that the hanging bracket is provided with hinge holes F, G, H, I the number of which is consistent with that of the positioning holes; as can be seen from the figure: the hinge holes are arranged at the bottom end of the hanger frame along the length direction of the hanger frame, and the hinge holes can be hinged with the top end of the oil cylinder one by one (the top end of the oil cylinder is hinged with different hinge holes on the hanger frame one by one through a hinge pin 5). The limit moment of force formed between the hinge holes and the pivot points is equal to the limit moment of resistance when the suspension rods are in one-to-one insertion fit with the corresponding positioning holes. For example: when a positioning pin 8 is inserted and embedded into a positioning hole d on the hanger (see fig. 1; the hoisting limit marked by the positioning hole d is 2000kg), the length of the resistance arm of the lifting hook is DE; at the moment, a hinged hole position where the oil cylinder is hinged with the hanger is F, and the power arm is FE; the quota moment formed by the resistance arm DE is equal to the power moment formed by the power arm FE; the power moment is the product of the power arm FE and the pressure limiting value of the oil cylinder safety valve, and the pressure limiting value of the oil cylinder safety valve is a determined value, so that the specific position of the hinge hole F can be determined. Similarly, when the positioning pin is inserted and embedded into the positioning hole a on the hanger (see fig. 2; the hoisting limit marked by the positioning hole a is 500kg), the length of the resistance arm of the lifting hook is AE; at the moment, the position of a hinged hole of the oil cylinder and the hanger is I, and the power arm is IE; the quota moment formed by the resistance arm AE is equal to the power moment formed by the power arm IE; the power moment is the product of the voltage limiting value of the power arm GE and the safety valve of the oil cylinder, and the voltage limiting value of the safety valve of the oil cylinder is also a determined value, so that the specific position of the hinge hole G can be determined. By analogy, the specific positions of the G hinge hole and the H hinge hole can be determined one by one.
Obviously, when the crane lifting weight control device is used, the positioning holes and the hinge holes are required to be in one-to-one correspondence and used simultaneously, so that the crane lifting weight can be controlled within the indicated limit, and the safety is ensured. At the moment, the oil cylinder is hinged with different hinge holes and reaches the limit moment, and the oil pressure in the oil cylinder can reach the pressure limiting critical standard of the safety valve; and the hoisting weight of the hoisting frame just reaches the hoisting limit. Therefore, even if a user hoists goods with the weight exceeding the marked quota, the oil cylinder safety valve is opened due to the fact that the oil pressure is out of limit, the hoisting frame cannot hoist the goods, and potential safety hazards of the existing hoisting machine are eliminated.
Claims (4)
1. A safe crane comprises a frame with a traveling wheel (1), a hanger (7) supported by the frame, and an oil cylinder (4) with two ends respectively hinged with the hanger and the frame to push the hanger; a hanging rod (9) is inserted and embedded in the inner cavity of the hanging bracket in a sliding way, and a lifting hook (6) is installed at one end of the hanging rod which is suspended and extended outside the hanging bracket; the hanger rod can be in one-to-one inserting fit with a plurality of positioning holes arranged on the wall part of the hanger frame so as to adjust the overhanging length of the hanger rod;
the method is characterized in that: hinge holes which are the same as the positioning holes in number and can be hinged with the top end of the oil cylinder are formed in the hanging bracket, and the hinge holes are arranged along the length direction of the hanging bracket; the limited dynamic moment formed between the hinge holes and the pivot is equal to the limited resisting moment when the suspension rods are in one-to-one insertion fit with the corresponding positioning holes; and when the oil cylinder is hinged with different hinge holes and reaches the limit moment, the oil pressure in the oil cylinder reaches the pressure limiting critical standard of the safety valve.
2. A hoist safe in use according to claim 1, characterized in that: the top end of the oil cylinder is hinged with different hinge holes on the hanger through hinge pins (5).
3. A hoist safe in use according to claim 2, characterized in that: the hanger rod is respectively in inserting fit with different positioning holes on the hanger frame through a positioning bolt (8).
4. A hoist safe in use according to claim 3, characterized in that: the hinge holes are arranged at the bottom end of the hanger frame along the length direction of the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120863759.8U CN216336241U (en) | 2021-04-25 | 2021-04-25 | Crane safe to use |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120863759.8U CN216336241U (en) | 2021-04-25 | 2021-04-25 | Crane safe to use |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216336241U true CN216336241U (en) | 2022-04-19 |
Family
ID=81128653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120863759.8U Active CN216336241U (en) | 2021-04-25 | 2021-04-25 | Crane safe to use |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216336241U (en) |
-
2021
- 2021-04-25 CN CN202120863759.8U patent/CN216336241U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206447468U (en) | A kind of frame suitable for building industrialization prefabricated part hanging slides suspender | |
| CN205294625U (en) | Prefabricated plate stone tongs | |
| CN204355946U (en) | A kind of device lifting large wt pts | |
| CN216336241U (en) | Crane safe to use | |
| CN106904526A (en) | One kind the lifting adjustable General balance beam suspender of span and its application method | |
| CN213537007U (en) | Special combined clamp for carbon block stacking crown block | |
| CN207420464U (en) | A kind of hydraulic foldable stent for being used to support derrick | |
| CN107265291A (en) | Path internal expanding type self-locking sling | |
| CN106629421A (en) | Swing arm tower crane provided with integrated hoisting arm | |
| CN113148861B (en) | Adjust simple safe in utilization's loop wheel machine | |
| CN203572671U (en) | Manual chain hoist testbed | |
| CN203113305U (en) | Hydraulic balancing device of ship lift cable wire with mechanical locking function | |
| CN208516859U (en) | A kind of Mobile portable mechanical type lifter | |
| CN208218181U (en) | A kind of ESR ingot special hanger | |
| CN212959325U (en) | Double-acting oil cylinder and lifting tail plate with hydraulic lock | |
| CN206203760U (en) | Height adjustable rubbish hangs support meanss | |
| CN206615940U (en) | A kind of swing arm tower crane with integral type arm | |
| CN204938711U (en) | A kind of suspender lifting H profile steel | |
| CN205076674U (en) | Gantry crane's assembly auxiliary device | |
| CN207844934U (en) | A kind of hydraulic hoisting device | |
| CN215828162U (en) | High-safety-performance crane for construction engineering | |
| CN216377149U (en) | Injection molding machine template hoist | |
| CN220078310U (en) | Whole buttress jack-up hoist of ring forging | |
| CN216583819U (en) | Lifting appliance for lifting steel coils | |
| CN216662203U (en) | Lifting ring balance hook rigging for lifting transport box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |