CN210764043U - Pulley yoke of tower crane - Google Patents
Pulley yoke of tower crane Download PDFInfo
- Publication number
- CN210764043U CN210764043U CN201921547404.7U CN201921547404U CN210764043U CN 210764043 U CN210764043 U CN 210764043U CN 201921547404 U CN201921547404 U CN 201921547404U CN 210764043 U CN210764043 U CN 210764043U
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- China
- Prior art keywords
- pulley
- roller
- supports
- connecting shaft
- tower crane
- 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.)
- Expired - Fee Related
Links
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 239000002184 metal Substances 0.000 description 2
- 238000009435 building construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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Abstract
The utility model relates to a pulley yoke of a tower crane, which comprises a pulley, a connecting shaft and an anti-drop device; the pulley is sleeved on the connecting shaft and connected with the connecting shaft through a bearing; the surface of the pulley is provided with a groove which is sunken towards the center of the pulley; the anti-falling device comprises two supports, ejector rods and rollers, the two supports are respectively positioned on two sides of the pulley and arranged on the connecting shaft, and a gap is formed between each two supports and the pulley; the top rod is arranged above the pulley, and two ends of the top rod are respectively arranged on the two brackets; the two brackets are provided with mounting holes for accommodating the ejector rods, the mounting holes are long and are arranged along the axial direction of the brackets, and the ejector rods are connected with the tops of the mounting holes through pressure springs; the roller is sleeved on the ejector rod and located between the two supports, and the roller can roll on the ejector rod. The utility model has the characteristics of structural design is reasonable, and the security is high.
Description
Technical Field
The utility model belongs to the technical field of the hoist, concretely relates to tower crane pulley yoke.
Background
Tower cranes are also called tower cranes. And the movable arm is arranged on the rotary crane at the upper part of the high-rise tower body. The working space is large, and the device is mainly used for vertical and horizontal conveying of materials and installation of building components in building construction. The device consists of a metal structure, a working mechanism and an electrical system. The metal structure comprises a tower body, a movable arm, a base and the like. The working mechanism has four parts of lifting, amplitude variation, rotation and walking. The electric system comprises a motor, a controller, a power distribution cabinet, a connecting circuit, a signal and lighting device and the like.
In the prior art, when a pulley used on a tower crane is used and the sliding speed between a steel wire rope and the pulley is too high, the steel wire rope is easily separated from a slideway on the pulley due to friction between the steel wire rope and the pulley, so that goods are knocked to the ground, and safety accidents are easily caused.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that to above-mentioned defect, provide a tower crane pulley yoke, structural design is reasonable, and the security is high.
The utility model provides a technical scheme that its technical problem adopted as follows:
a pulley yoke of a tower crane comprises pulleys, a connecting shaft and an anti-falling device; the pulley is sleeved on the connecting shaft and connected with the connecting shaft through a bearing; the surface of the pulley is provided with a groove which is sunken towards the center of the pulley; the anti-falling device comprises two supports, ejector rods and rollers, the two supports are respectively positioned on two sides of the pulley and arranged on the connecting shaft, and a gap is formed between each two supports and the pulley; the top rod is arranged above the pulley, and two ends of the top rod are respectively arranged on the two brackets; the two brackets are provided with mounting holes for accommodating the ejector rods, the mounting holes are long and are arranged along the axial direction of the brackets, and the ejector rods are connected with the tops of the mounting holes through pressure springs; the roller is sleeved on the ejector rod and located between the two supports, and the roller can roll on the ejector rod.
Further, both ends of the surface of the roller are sunken towards the center to form guide grooves.
Furthermore, limiting plates are arranged at two ends of the ejector rod and are located on the outer side of the support.
Further, a spring is arranged between the two ends of the roller and the support, one end of the spring is arranged on the end face of the roller, and a gap is arranged between the other end of the spring and the support.
Further, a plurality of balls are embedded in the groove and can roll freely, and the centers of the balls are located inside the pulley.
The utility model has the advantages that:
(1) the utility model provides a connecting axle is installed on the jib loading boom of hoist, the pulley passes through the bearing with the connecting axle and links to each other, the gyro wheel just can roll on the connecting axle like this, thereby be convenient for wire rope's the flexible of making a round trip, and set up the recess on the gyro wheel, wire rope places in this recess, can guarantee like this that wire rope moves on the gyro wheel, be connected through the pressure spring between the top of ejector pin and mounting hole, and the cylinder overlaps again and establishes on the ejector pin, like this the cylinder can be with wire rope control in the recess of gyro wheel, prevent that wire rope from breaking away from the recess in fast-speed slip, thereby guarantee the security, and the cylinder can freely roll on the ejector pin, thereby can not cause the influence to wire.
(2) The utility model discloses the both ends on the surface of well cylinder all form the guide way to central department is sunken, can make more stable of wire rope operation under high speed.
(3) The utility model discloses a limiting plate can fix the ejector pin in the mounting hole to the axial motion of ejector pin along the mounting hole.
(4) The utility model discloses well cylinder can remove to both sides when being driven to rotate by wire rope, can make the cylinder be in directly over the recess through the spring.
(5) The utility model discloses a ball can greatly reduced frictional force to the fast-speed lift of wire rope, increase of service life can also prevent in addition that wire rope from breaking away from the recess, in order to improve the security.
Drawings
The foregoing and other objects, features, and advantages of the invention will be apparent from the following detailed description taken in conjunction with the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention;
wherein: the anti-dropping device comprises a pulley 1, a groove 11, a ball 12, a connecting shaft 2, an anti-dropping device 3, a support 31, a mandril 32, a roller 33, a guide groove 331, a mounting hole 34, a limiting plate 35, a pressure spring 36, a spring 37 and a steel wire rope 4.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the pulley yoke of the tower crane comprises a pulley 1, a connecting shaft 2 and an anti-falling device 3, wherein the anti-falling device 3 can prevent a steel wire rope 4 from being separated from the pulley 1 so as to ensure safety.
The pulley 1 is sleeved on the connecting shaft 2, and the pulley 1 is connected with the connecting shaft 2 through a bearing 5; the pulley 1 is provided with a groove 11 depressed toward the center of the pulley on the tread, a plurality of balls 12 are embedded in the groove 11, the balls 12 can roll freely, and the center of the ball is located inside the pulley.
The anti-falling device 3 comprises two supports 31, two ejector rods 32 and two rollers 33, the two supports 31 are respectively arranged on two sides of the pulley 1 and arranged on the connecting shaft 2, and a gap is formed between the two supports 31 and the pulley 1 to ensure the normal rotation of the pulley 1. The push rod 32 is arranged above the pulley 1 and is parallel to the connecting shaft 2, and two ends of the push rod 32 are respectively arranged on the two brackets 31; the two supports 31 are provided with mounting holes 34 for accommodating the ejector rods, the two ends of the ejector rod 32 are provided with limiting plates 35, the limiting plates 35 are located on the outer sides of the supports 31, and the ejector rods are axially fixed through the limiting plates. The mounting hole 34 is long and is arranged along the axial direction of the bracket 31, and the top of the mandril 32 and the top of the mounting hole 34 are connected through a pressure spring 36; the roller 33 is sleeved on the top bar 32 and located between the two brackets 31, the roller 33 can roll on the top bar 32, and both ends of the surface of the roller 33 are recessed towards the center to form a guide groove 331. A spring 37 is provided between each end of the roller 33 and the bracket 31, one end of the spring 37 is provided on the end surface of the roller 33, and a gap is provided between the other end of the spring 37 and the bracket 31. The steel wire rope can jump up and down in high-speed lifting and acts on the roller, the roller can rotate along with the lifting of the steel wire rope due to the fact that the roller can rotate freely, the lifting of the steel wire rope cannot be influenced, the ejector rod moves upwards under stress and compresses the pressure spring, it is stated that when the pressure spring is compressed to the limit, the minimum distance between the surface of the roller and the surface of the roller is smaller than the diameter of the steel wire rope, and therefore the steel wire rope can be guaranteed to be located in the groove all the time, and safety is guaranteed; when the pressure spring is in a normal state, the distance between the surface of the roller and the surface of the roller is still smaller than the diameter of the steel wire rope, and the structural design is reasonable, so that the safety is ensured.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the techniques of the present invention are substantially any simple modification and equivalent changes to the above embodiments, all falling within the protection scope of the present invention.
Claims (5)
1. A pulley yoke of a tower crane is characterized in that: comprises a pulley, a connecting shaft and an anti-falling device;
the pulley is sleeved on the connecting shaft and connected with the connecting shaft through a bearing; the surface of the pulley is provided with a groove which is sunken towards the center of the pulley;
the anti-falling device comprises two supports, ejector rods and rollers, the two supports are respectively positioned on two sides of the pulley and arranged on the connecting shaft, and a gap is formed between each two supports and the pulley; the top rod is arranged above the pulley, and two ends of the top rod are respectively arranged on the two brackets; the two brackets are provided with mounting holes for accommodating the ejector rods, the mounting holes are long and are arranged along the axial direction of the brackets, and the ejector rods are connected with the tops of the mounting holes through pressure springs; the roller is sleeved on the ejector rod and located between the two supports, and the roller can roll on the ejector rod.
2. The pulley yoke of tower crane according to claim 1, wherein: both ends of the surface of the roller are sunken towards the center to form guide grooves.
3. The pulley yoke of tower crane according to claim 1, wherein: limiting plates are arranged at two ends of the ejector rod and are located on the outer side of the support.
4. The pulley yoke of tower crane according to claim 1, wherein: and a spring is arranged between the two ends of the roller and the support, one end of the spring is arranged on the end surface of the roller, and a gap is arranged between the other end of the spring and the support.
5. The pulley yoke of tower crane according to claim 1, wherein: the groove is embedded with a plurality of balls, the balls can roll freely, and the centers of the balls are located inside the pulley.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921547404.7U CN210764043U (en) | 2019-09-17 | 2019-09-17 | Pulley yoke of tower crane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921547404.7U CN210764043U (en) | 2019-09-17 | 2019-09-17 | Pulley yoke of tower crane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210764043U true CN210764043U (en) | 2020-06-16 |
Family
ID=71035856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921547404.7U Expired - Fee Related CN210764043U (en) | 2019-09-17 | 2019-09-17 | Pulley yoke of tower crane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210764043U (en) |
-
2019
- 2019-09-17 CN CN201921547404.7U patent/CN210764043U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200616 |