CN213294527U

CN213294527U - Lifting limiter mounting structure and crane

Info

Publication number: CN213294527U
Application number: CN202021615137.5U
Authority: CN
Inventors: 方德威
Original assignee: Hunan Zhonglian Zhongke Construction Hoisting Machinery Co ltd; Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Hunan Zhonglian Zhongke Construction Hoisting Machinery Co ltd; Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-05-28
Anticipated expiration: 2030-08-05

Abstract

The utility model relates to a hoist field discloses a play to rise mounting structure and hoist of stopper, plays to rise mounting structure of stopper including the play to rise stopper (6) and the drive arrangement that have transmission shaft (5), drive arrangement includes end cover (1) and dabber (2), transmission shaft (5) are connected with first nylon axle (4), dabber (2) are connected with second nylon axle (3), first nylon axle (4) with second nylon axle (3) transmission is connected and can be for radial movement each other. Through above-mentioned technical scheme, two nylon axles all have a link that the rigidity is relatively weak to can radial displacement relatively between two nylon axles, can eliminate the eccentric error between dabber and the transmission shaft more effectively, avoid producing stress concentration between two nylon axles, avoid being broken under other effort outside the moment of torsion, with the nylon axle of protection better, prolong its life.

Description

Lifting limiter mounting structure and crane

Technical Field

The utility model relates to a hoist field specifically relates to a play to rise mounting structure of stopper to a hoist is related to.

Background

The crane comprises a driving device and a hoisting mechanism, wherein the driving device drives a winding drum of the hoisting mechanism to rotate, so that a steel wire rope on the winding drum is driven to wind or release, and the lifting hook is driven to lift.

In order to avoid the damage of the lifting hook caused by lifting beyond the limit height position, the torque mandrel of the driving device is in transmission connection with the transmission shaft of the limiting stopper, and when the transmission shaft of the limiting stopper rotates to an angle corresponding to the limit height position of the lifting hook, the limiting stopper is triggered to control the driving device to stop outputting the torque.

When the limiter is installed, an eccentric error exists between a transmission shaft and a mandrel of the limiter, the transmission shaft and the mandrel are connected through a nylon sleeve in the prior art to eliminate the error, but the nylon shaft at the position is easy to damage.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a rise mounting structure of stopper to solve the problem of the easy damage of nylon structure between transmission shaft and the dabber.

In order to achieve the above object, the utility model provides a play to rise mounting structure of stopper, a serial communication port, play to rise mounting structure of stopper including the play to rise stopper and the drive arrangement that has the transmission shaft, drive arrangement including the end cover that has the through-hole with align in the dabber of through-hole, play to rise the stopper install in the end cover, the transmission shaft is connected with first nylon axle, the dabber is connected with second nylon axle, first nylon axle with second nylon axle transmission is connected, first nylon axle with second nylon axle can be for radial movement each other.

Alternatively, one of the first nylon shaft and the second nylon shaft is provided with a radially extending groove on an end surface facing the other, and the other end surface facing the one is provided with a plate-shaped portion slidably inserted into the groove.

Optionally, the transmission shaft is inserted into the first nylon shaft, and the first nylon shaft and the transmission shaft are connected by a radially extending pin.

Optionally, the second nylon shaft is inserted into the mandrel and the second nylon shaft and the mandrel are interference fit.

Optionally, the cross-section of the end of the mandrel into which the second nylon shaft is inserted is non-circular in shape.

Optionally, the first nylon shaft and/or the second nylon shaft are made of a single cast nylon.

Optionally, the first nylon shaft and/or the second nylon shaft has a stiffness greater than or equal to 150HB, a tensile strength greater than or equal to 78MPa, and a flexural strength greater than or equal to 90 MPa.

Optionally, the lifting limiter is mounted to the end cap by a bracket.

Optionally, the drive device comprises a speed reducer.

Additionally, the utility model also provides a hoist, wherein, the hoist is provided with above scheme play to rise the mounting structure of stopper.

Through above-mentioned technical scheme, two nylon axles all have a link that the rigidity is relatively weak to can radial displacement relatively between two nylon axles, can eliminate the eccentric error between dabber and the transmission shaft more effectively, avoid producing stress concentration between two nylon axles, avoid being broken under other effort outside the moment of torsion, with the nylon axle of protection better, prolong its life.

Drawings

Fig. 1 is a partial cross-sectional view of a lift stop according to an embodiment of the present invention;

fig. 2 and fig. 3 are schematic structural diagrams of a first nylon shaft according to an embodiment of the present invention at different viewing angles;

fig. 4 and 5 are schematic structural diagrams of the second nylon shaft at different viewing angles according to the embodiment of the present invention.

Description of the reference numerals

1-end cover, 2-mandrel, 3-second nylon shaft, 4-first nylon shaft, 5-transmission shaft, 6-lifting limiter, 7-bracket and 8-groove.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

The utility model provides a play to rise mounting structure of stopper, wherein, play to rise mounting structure of stopper including the play to rise stopper 6 and the drive arrangement that has transmission shaft 5, drive arrangement including have the through-hole end cover 1 with align in the dabber 2 of through-hole, play to rise stopper 6 install in end cover 1, transmission shaft 5 is connected with first nylon axle 4, dabber 2 is connected with second nylon axle 3, first nylon axle 4 with the transmission of second nylon axle 3 is connected, first nylon axle 4 with second nylon axle 3 can be for radial movement each other.

The driving device can be used for driving a hoisting mechanism of the crane to realize the lifting of the lifting hook and the hoisted object. The mandrel 2 of the driving device is one of torque transmission structures, the transmission shaft 5 is approximately axially aligned with the mandrel 2 (the two can have eccentricity) and is in transmission connection, so that the transmission shaft 5 can receive the torque of the mandrel 2, and when the transmission shaft 5 rotates to the limit position corresponding to the lifting hook, the lifting limiter 6 is triggered to control the driving device to stop outputting the torque.

In the prior art, two ends of a nylon sleeve connected between a transmission shaft and a mandrel are in rigid connection, and the nylon sleeve is in a stress state due to eccentricity between the transmission shaft and the mandrel and is easily damaged.

In this scheme, as shown in fig. 1, be connected through two nylon through axle drive between transmission shaft 5 and the dabber 2, the nylon axle has certain elasticity and pliability, the one end of first nylon axle 4 is connected in rigid transmission shaft 5, the other end is connected with the lower second nylon axle 3 of rigidity, it is similar, the one end of second nylon axle 3 is connected in rigid dabber 2, the other end is connected with the lower first nylon axle 4 of rigidity, that is to say, the nylon axle only one end is the connection that the rigidity is stronger, the other end is the connection that the rigidity is less strong, and two nylon axles can radial relative movement, therefore, the connection that the rigidity is less strong between two nylon axles can absorb the eccentric error between dabber 2 and the transmission shaft 5, avoid appearing stress concentration between two nylon axles, protect two nylon axles better.

Specifically, a radially extending groove 8 is provided on an end surface of one of the first nylon shaft 4 and the second nylon shaft 3 facing the other, and a plate-shaped portion slidably inserted into the groove 8 is provided on an end surface of the other. For example, as shown in fig. 2 and 3, an end of the first nylon shaft 4 facing the second nylon shaft 3 is formed with a groove 8, as shown in fig. 4 and 5, an end of the second nylon shaft 3 facing the first nylon shaft 4 is provided with a plate-shaped portion inserted into the groove 8 so that torque can be transmitted by cooperation of the plate-shaped portion and the groove 8, and the plate-shaped portion can be moved in a radial direction of the groove 8 to eliminate an eccentric error between the spindle 2 and the drive shaft 5. The plate-like portion may be formed by cutting two surfaces parallel to the central axis on the outer periphery of the nylon shaft. The plate-like portion may have a clearance from the groove 8 to absorb mounting errors. On the other hand, the plate-like portion may be formed on the first nylon shaft 4, and the groove 8 may be formed on the second nylon shaft 3.

In other embodiments, the grooves 8 may be two of two crosses, the plate-shaped portions are correspondingly two of the crosses, and a certain interval is maintained between the plate-shaped portions and the grooves 8 to allow a small range of oscillation of the plate-shaped portions in the grooves 8 in a direction perpendicular to the extending direction of the grooves 8.

Wherein, the transmission shaft 5 inserts first nylon shaft 4, first nylon shaft 4 with transmission shaft 5 is through radially extending's round pin hub connection. As shown in fig. 2 and 3, one end of the first nylon shaft 4 facing the transmission shaft 5 is formed with a blind hole and is provided with a radial through hole to allow a pin to pass through, and the pin also passes through the transmission shaft 5 inserted into the blind hole to realize the connection of the transmission shaft 5 and the first nylon shaft 4.

In addition, the second nylon shaft 3 is inserted into the mandrel 2, and the second nylon shaft 3 and the mandrel 2 are interference-fitted. As shown in fig. 1, the mandrel 2 extends outwards from the through hole of the end cover 1, and a blind hole is formed on the end surface of the mandrel, the second nylon shaft 3 is inserted into the blind hole, and the second nylon shaft 3 is in interference fit with the mandrel 2 to realize torque transmission.

Further, the cross section of one end of the mandrel 2 into which the second nylon shaft 3 is inserted is non-circular in shape. For example, the end of the second nylon shaft 3 inserted into the mandrel 2 may be a quadrangle, a triangle, a hexagon, etc., or a part may be cut on the cylindrical outer circumference of the second nylon shaft 3, a flat surface may be formed on the outer circumference, and a blind hole of the mandrel 2 may be formed in a corresponding shape, so that torque may be transmitted more efficiently.

Wherein the first nylon shaft 4 and/or the second nylon shaft 3 are made of a single cast nylon. The nylon shaft structure can be obtained by directly polymerizing a caprolactam monomer by a mould under the action of strong base (such as NaOH) and some promoters. The nylon material has certain elasticity so as to absorb the installation error between the mandrel 2 and the transmission shaft 5.

Further, the hardness of the first nylon shaft 4 and/or the second nylon shaft 3 is greater than or equal to 150HB, the tensile strength is greater than or equal to 78MPa, and the bending strength is greater than or equal to 90 MPa. The stiffness, tensile strength and bending strength of the nylon shaft should be maintained above a certain level to ensure that torque can be transferred between the spindle 2 and the drive shaft 5 stably and efficiently.

Wherein, the lifting limiter 6 is arranged on the end cover 1 through a bracket 7. The bracket 7 may be of any form capable of supporting the lifting stop 6, may be formed from a plate-like member and may be releasably attached to the end cap 1 by bolts. Due to the existence of the two nylon shafts, the deviation of the non-concentricity of the mandrel 2 and the transmission shaft 5 caused by inaccurate installation position of the bracket 7 can be absorbed to a certain degree.

Wherein the driving device comprises a speed reducer. The driving device comprises one of a motor, an engine and a hydraulic motor, the speed reducer can receive torque and realize speed reduction to increase the torque, and the transmission shaft 5 can be in transmission connection with the mandrel 2 of the speed reducer. In other embodiments, the propeller shaft 5 may also be directly connected to the output shaft of an electric, motor or hydraulic motor.

On the other hand, the utility model also provides a hoist, wherein, the hoist is provided with above scheme play to rise the mounting structure of stopper. The driving device can drive the hoisting mechanism to drive the lifting hook to lift through the steel wire rope, the lifting limiter 6 can control the driving device to stop outputting torque according to the rotation of the transmission shaft 5 when the lifting hook reaches the limit height position, and the lifting hook is protected.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. The utility model provides a rise mounting structure of stopper, rise mounting structure of stopper including the play to rise stopper (6) and the drive arrangement that have transmission shaft (5), drive arrangement including have through-hole end cover (1) with align in dabber (2) of through-hole, characterized in that, play to rise stopper (6) install in end cover (1), transmission shaft (5) are connected with first nylon axle (4), dabber (2) are connected with second nylon axle (3), first nylon axle (4) with second nylon axle (3) transmission is connected, first nylon axle (4) with second nylon axle (3) can be for radial movement each other.

2. A mounting structure of a lifting stopper according to claim 1, wherein one of the first nylon shaft (4) and the second nylon shaft (3) is provided with a radially extending groove (8) on an end surface thereof facing the other, and the other is provided with a plate-like portion slidably inserted into the groove (8) on the end surface thereof facing the one.

3. A lifting stop mounting structure according to claim 1, wherein the drive shaft (5) is inserted into the first nylon shaft (4), and the first nylon shaft (4) and the drive shaft (5) are connected by radially extending pins.

4. A lifting stop mounting structure according to claim 1, wherein the second nylon shaft (3) is inserted into the mandrel (2), and the second nylon shaft (3) and the mandrel (2) are interference fitted.

5. A lifting stop mounting structure according to claim 4, characterised in that the cross-section of the end of the mandrel (2) into which the second nylon shaft (3) is inserted is of non-circular shape.

6. A lifting stop mounting structure according to claim 1, wherein the first nylon shaft (4) and/or the second nylon shaft (3) is made of a single cast nylon.

7. A lifting limiter mounting structure according to claim 6, wherein the first nylon shaft (4) and/or the second nylon shaft (3) has a hardness greater than or equal to 150HB, a tensile strength greater than or equal to 78MPa and a bending strength greater than or equal to 90 MPa.

8. A lifting stop mounting structure according to claim 1, characterised in that the lifting stop (6) is mounted to the end cap (1) by a bracket (7).

9. A lifting stop mounting structure according to claim 1, wherein the drive means comprises a speed reducer.

10. A crane, characterized in that the crane is provided with a mounting structure for a lifting stop according to any one of claims 1-9.