阅读说明：本技术 一种一体化注塑成型的起重机卷筒 (Integrated injection molding crane drum ) 是由 王立建 张春丽 王智军 刘文明 武建华 赵朝云 张伟 于 2021-09-07 设计创作，主要内容包括：本发明涉及一种一体化注塑成型的起重机卷筒,包括钢筋笼骨架和塑料筒体；所述钢筋笼骨架制作完成后放入成型模具内,再通过注塑机将融化的塑料材料注射到模具模腔内形成包裹所述钢筋笼骨架的塑料筒体；塑料筒体包括环筒和环形挡板,环筒的内壁上还设有多个轴向加强筋；环筒内还设有内支撑架,内支撑架包括内支撑筒和多个环形支撑板,环形支撑板的外缘还设有与轴向加强筋适配的凹槽,内支撑筒的内壁上设有多个螺旋导流板。该一体化注塑成型的起重机卷筒,通过注塑成型包裹钢筋笼骨架的塑料筒体可降低卷筒的自重,通过注塑成型可减少卷筒的加工步骤,显著提高生产效率；设置内支撑筒可提高起重机卷筒的结构强度并改善散热性能。(The invention relates to an integrated injection molding crane reel, which comprises a reinforcement cage framework and a plastic barrel; after the reinforcement cage framework is manufactured, putting the reinforcement cage framework into a forming die, and injecting a molten plastic material into a die cavity of the die through an injection molding machine to form a plastic barrel wrapping the reinforcement cage framework; the plastic cylinder comprises an annular cylinder and an annular baffle, and a plurality of axial reinforcing ribs are further arranged on the inner wall of the annular cylinder; an inner support frame is further arranged in the annular cylinder and comprises an inner support cylinder and a plurality of annular support plates, grooves matched with the axial reinforcing ribs are further formed in the outer edges of the annular support plates, and a plurality of spiral guide plates are arranged on the inner wall of the inner support cylinder. According to the integrally injection-molded crane winding drum, the self weight of the winding drum can be reduced by injection molding of the plastic drum body wrapping the reinforcement cage framework, the processing steps of the winding drum can be reduced by injection molding, and the production efficiency is obviously improved; the structural strength of the crane winding drum can be improved and the heat dissipation performance can be improved by arranging the inner supporting drum.)

1. An integrated injection molding crane reel is characterized by comprising a reinforcement cage framework and a plastic barrel; after the reinforcement cage framework is manufactured, putting the reinforcement cage framework into a forming die, and injecting a molten plastic material into a die cavity of the die through an injection molding machine to form a plastic barrel wrapping the reinforcement cage framework; the plastic cylinder body comprises a ring cylinder and ring-shaped baffles positioned at two ends of the ring cylinder, and the inner wall of the ring cylinder is also provided with a plurality of axial reinforcing ribs which are formed by injection molding and correspond to the vertical ribs; an inner support frame is further arranged in the annular cylinder and comprises an inner support cylinder and a plurality of annular support plates positioned on the outer wall of the inner support cylinder, and the annular support plates are uniformly arranged along the central axis of the inner support cylinder; the outer edge of the annular supporting plate is abutted against the inner wall of the annular cylinder, and a groove matched with the axial reinforcing rib is formed in the outer edge of the annular supporting plate; and a plurality of spiral guide plates are arranged on the inner wall of the inner support cylinder.

2. The integrally injection molded crane reel of claim 1, wherein: the steel bar cage framework comprises a cylindrical ring frame and an annular end frame, and the annular end frame is located at one end of the cylindrical ring frame.

3. The integrally injection molded crane reel of claim 2, wherein: the outer wall of the ring cylinder is provided with an injection-molded rope groove, one end of the ring cylinder is provided with a connecting ring plate wrapping the annular end frame, the inner side of the connecting ring plate is provided with a connecting cylinder, and the inner wall of the connecting cylinder is provided with an inner gear ring.

4. The integrally injection molded crane reel of claim 3, wherein: the cylindrical ring frame comprises a plurality of vertical ribs parallel to the central axis of the winding drum and a plurality of outer ring ribs which are perpendicular to the vertical ribs and are uniformly arranged along the central axis of the winding drum, and the outer ring ribs and the vertical ribs are welded and connected to form the cylindrical ring frame; the annular end frame comprises an inner ring rib of the end face and a plurality of radial reinforcing ribs uniformly distributed along the radial direction of the winding drum, the inner ends of the radial reinforcing ribs are connected with the inner ring rib of the end face in a welding mode, and the outer ends of the radial reinforcing ribs are connected with the cylindrical ring frame in a welding mode.

5. The integrally injection molded crane reel of claim 1, wherein: each the outer edge of annular supporting plate still be equipped with the mounting groove that the inner wall of a ring section of thick bamboo corresponds, install the pressure foil gage through silica gel encapsulation in the mounting groove.

6. The integrally injection molded crane reel of claim 1, wherein: the annular supporting plate is also provided with vent grooves between the grooves, and the vent grooves in the annular supporting plate are correspondingly arranged to form heat dissipation grooves arranged along the central axis of the inner supporting cylinder.

7. The integrally injection molded crane reel of claim 1, wherein: an axial partition plate positioned on the outer wall of the inner support cylinder is arranged between every two adjacent annular support plates, and the height of the axial partition plate is smaller than that of the annular support plates; and the wall of the inner support cylinder is also provided with vent holes positioned between the axial clapboards.

Technical Field

The invention relates to hoisting equipment, in particular to an integrated injection molding crane drum.

Background

The crane refers to a multi-action crane for vertically lifting and horizontally carrying heavy objects within a certain range. According to the difference of the structure and the performance, the crane can be generally divided into four categories of light and small hoisting equipment, bridge type hoisting machinery, arm support type cranes and cable type cranes; the jib crane can be operated in a circular field and above the circular field, is multipurpose for outdoor loading, unloading, mounting and other works, and generally comprises a fixed rotary crane, a tower crane, an automobile crane, a tire crane, a crawler crane and the like.

The drum-reducer assembly is a core component of hoisting equipment, and determines the operating performance of the hoisting equipment to a great extent, the drum of the crane in the current market usually adopts a casting drum or a welding drum, and the casting drum is generally used for equipment with smaller hoisting capacity and is mainly used for bridge cranes/gantry cranes; the welding drum is widely used for fixed rotary cranes, tower cranes, automobile cranes, etc. For example, "a drum reducer assembly of an automobile crane" disclosed in chinese patent document No. CN201686428U includes a drum, a brake, a planetary gear reducer, left and right support seats, and a motor adapter, where the left part of the drum is supported on a large planet carrier, and the right part of the drum is supported in a bearing hole of a frame. The crane winding drum in the file is usually a welded winding drum which is usually of an all-steel structure and is formed by plate rolling, welding and finish turning, and a single winding drum is long in processing time, low in production efficiency and high in cost; the self weight is heavy, and the requirement on the structure of the whole tower crane is high. In addition, the temperature is easily increased to aggravate the aging of the winding drum due to the friction of the steel wire rope in the operation process of the existing winding drum of the crane, and the service life of the winding drum is influenced.

As described above, the welding drum currently used for the jib crane has the disadvantages of long production period, large self weight, poor heat dissipation performance, and the like, and needs to be improved.

Disclosure of Invention

The invention aims to provide an integrated injection molding crane winding drum, which is used for solving the problems of long production period, large self weight and poor heat dissipation performance of the existing crane winding drum.

In order to solve the problems, the invention provides an integrated injection molding crane winding drum, which comprises a reinforcement cage framework and a plastic drum body; after the reinforcement cage framework is manufactured, putting the reinforcement cage framework into a forming die, and injecting a molten plastic material into a die cavity of the die through an injection molding machine to form a plastic barrel wrapping the reinforcement cage framework; the plastic cylinder body comprises a ring cylinder and ring-shaped baffles positioned at two ends of the ring cylinder, and the inner wall of the ring cylinder is also provided with a plurality of axial reinforcing ribs which are formed by injection molding and correspond to the vertical ribs; an inner support frame is further arranged in the annular cylinder and comprises an inner support cylinder and a plurality of annular support plates positioned on the outer wall of the inner support cylinder, and the annular support plates are uniformly arranged along the central axis of the inner support cylinder; the outer edge of the annular supporting plate is abutted to the inner wall of the annular cylinder, the outer edge of the annular supporting plate is further provided with a groove matched with the axial reinforcing rib, and the inner wall of the inner supporting cylinder is provided with a plurality of spiral guide plates.

The integrated injection molding crane winding drum provided by the invention also has the following technical characteristics:

furthermore, the steel bar cage framework comprises a cylindrical ring frame and an annular end frame, and the annular end frame is positioned at one end of the cylindrical ring frame.

Furthermore, the outer wall of the ring cylinder is provided with an injection-molded rope groove, one end of the ring cylinder is provided with a connecting ring plate wrapping the annular end frame, the inner side of the connecting ring plate is provided with a connecting cylinder, and the inner wall of the connecting cylinder is provided with an inner gear ring.

Furthermore, the cylindrical ring frame comprises a plurality of vertical ribs parallel to the central axis of the winding drum and a plurality of outer ring ribs which are perpendicular to the vertical ribs and are uniformly arranged along the central axis of the winding drum, and the outer ring ribs are welded with the vertical ribs to form the cylindrical ring frame; the annular end frame comprises an inner ring rib of the end face and a plurality of radial reinforcing ribs uniformly distributed along the radial direction of the winding drum, the inner ends of the radial reinforcing ribs are connected with the inner ring rib of the end face in a welding mode, and the outer ends of the radial reinforcing ribs are connected with the cylindrical ring frame in a welding mode.

Furthermore, vent grooves located between the grooves are further formed in the annular supporting plates, and the vent grooves in the annular supporting plates are correspondingly arranged to form heat dissipation grooves arranged along the central axis of the inner supporting cylinder.

Further, an axial partition plate located on the outer wall of the inner support cylinder is arranged between every two adjacent annular support plates, and the height of the axial partition plate is smaller than that of the annular support plates; and the wall of the inner support cylinder is also provided with vent holes positioned between the axial clapboards.

Furthermore, the outer edge of each annular supporting plate is also provided with a mounting groove corresponding to the inner wall of the annular cylinder, and a pressure strain gauge packaged by silica gel is mounted in the mounting groove.

The invention has the following beneficial effects: according to the integrally injection-molded crane winding drum, the embedded steel reinforcement cage framework can ensure that the structural strength of the winding drum meets the requirement, the self weight of the winding drum can be reduced by injection molding of the plastic drum body wrapping the steel reinforcement cage framework, compared with the traditional welding winding drum and casting winding drum, the processing steps of the winding drum can be reduced by injection molding, the production efficiency is obviously improved, and the production cost is reduced; the structural strength of the ring cylinder can be further improved by arranging the inner support frame, when the inner wall of the inner support cylinder is provided with the plurality of spiral guide plates which rotate along with the ring cylinder, the axial flow of air in the ring cylinder is promoted so as to facilitate heat dissipation, and the heat dissipation performance of the crane winding drum can be improved while the structural strength of the inner support cylinder is increased.

Drawings

FIG. 1 is a schematic structural view of an integrally injection molded crane drum according to an embodiment of the present invention;

FIG. 2 is a schematic structural view from another perspective of the integrally injection molded crane drum of FIG. 1;

FIG. 3 is a right side view of the integrally injection molded crane drum of FIG. 1;

FIG. 4 is a cross-sectional view of the integrally injection molded crane reel of FIG. 1;

fig. 5 is a schematic structural view of the reinforcement cage framework in fig. 4;

FIG. 6 is a schematic structural view of an integrally injection molded crane drum according to an embodiment of the present invention;

FIG. 7 is a right side view of the integrally injection molded crane drum of FIG. 6;

FIG. 8 is a cross-sectional view of the integrally injection molded crane reel of FIG. 6;

FIG. 9 is a schematic structural diagram of an inner support frame in an embodiment of the present invention;

fig. 10 is a schematic view of the inner bracket of fig. 9 from another perspective;

fig. 11 is a partial cross-sectional view of the inner support bracket of fig. 9;

FIG. 12 is a schematic view of the production process of the integrally injection molded crane reel of the present invention.

Detailed Description

The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In one embodiment of the integrally injection molded crane reel of the present invention as shown in fig. 1 to 12, the integrally injection molded crane reel of this embodiment comprises a steel reinforcement cage framework 10 and a plastic cylinder 20; after the reinforcement cage framework 10 is manufactured, the reinforcement cage framework is placed into a forming die, and then the molten plastic material is injected into a die cavity of the die through an injection molding machine to form a plastic barrel 20 wrapping the reinforcement cage framework 10. Specifically, a corresponding reinforcement cage framework is manufactured according to the overall dimension of the winding drum, and the reinforcement cage framework is formed by welding reinforcing steel bars with the diameter of 3-10 mm; the forming die is designed according to the shape and the size of the winding drum, the reinforcement cage framework is placed in the forming die, then the melted plastic material is injected into a die cavity of the die through an injection molding machine, and the crane winding drum completely wrapped by the modified PBT plastic can be obtained after cooling; this kind of integration injection moulding's hoist reel, embedded steel reinforcement cage skeleton can guarantee that the structural strength of reel satisfies the demands, can reduce the dead weight of reel through the plastics barrel of injection moulding parcel steel reinforcement cage skeleton, and this kind of hoist reel compares with traditional welding reel, casting reel, and the processing step through the reducible reel of injection moulding is showing and is improving production efficiency, reduction in production cost.

In an embodiment of the present application, preferably, the steel reinforcement cage framework 10 includes a cylindrical ring frame 11 and an annular end frame 12, the annular end frame 12 is located at one end of the cylindrical ring frame 11, the cylindrical ring frame 11 forms a cylinder of the drum after being wrapped with plastic by injection molding, and the annular end frame forms an end face annular connecting plate of the drum after being formed by injection molding, so that the integrally injection molded crane drum has reliable structural strength through the embedded steel reinforcement cage framework, and particularly, radial support strength can be effectively improved by providing the annular end frame 12.

In an embodiment of the present application, preferably, the plastic cylinder 20 includes a ring cylinder 21 and ring-shaped baffles 22 at two ends of the ring cylinder 21, an injection-molded rope groove is provided on an outer wall of the ring cylinder 21, a connecting ring plate 23 wrapping the ring-shaped end frame 12 is provided at one end of the ring cylinder 21, a connecting cylinder 24 is provided on an inner side of the connecting ring plate 23, and an inner gear ring 25 facilitating installation of the planetary reduction mechanism is provided on an inner wall of the connecting cylinder 24, so that the rope groove and the inner gear ring integrated with the ring cylinder are formed on the ring cylinder by injection molding, which can significantly reduce subsequent winding drum processing steps and improve production efficiency.

In one embodiment of the present application, preferably, the cylindrical ring frame 11 includes a plurality of studs 111 parallel to the central axis of the winding drum, a plurality of outer ring ribs 112 perpendicular to the studs 111 and uniformly arranged along the central axis of the winding drum, and the outer ring ribs 112 are welded to the studs 111 to form the cylindrical ring frame 11; the annular end frame 12 comprises an inner ring rib 121 on the end face and a plurality of radial reinforcing ribs 122 uniformly arranged along the radial direction of the winding drum, the inner ends of the radial reinforcing ribs 122 are connected with the inner ring rib 121 on the end face in a welding mode, and the outer ends of the radial reinforcing ribs 122 are connected with the cylindrical annular frame 11 in a welding mode. Therefore, the cylindrical ring frame 11 and the annular end frame 12 have higher structural strength, effective supporting force can be provided for the plastic cylinder, and the structural strength of the integrated injection molding crane winding drum is ensured to meet the requirements.

In one embodiment of the present application, preferably, for example, a winding drum with an outline diameter of 550mm and a width of 420mm, the studs 111 are made of steel bars with a diameter of 6mm to 9mm and made of stainless steel 202, and the number of the studs 111 is 9-15; the outer ring ribs 112 are steel bars with the diameter of 3mm to 9mm and made of stainless steel 202, and the number of the outer ring ribs 112 is 4-8; the end face inner ring rib 121 and the radial reinforcing rib 122 are made of steel bars made of stainless steel 202, the number of the radial reinforcing ribs 122 is the same as that of the stud 111, and the stud, the outer ring rib, the end face inner ring rib and the radial reinforcing ribs are welded and connected through argon arc welding, so that the framework structure of the steel bar cage is reliable. Preferably, the plastic cylinder 20 is made of a modified PBT material (Polybutylene Terephthalate), so that the plastic cylinder is corrosion-resistant and wear-resistant, and has a long service life.

In an embodiment of the present application, preferably, a plurality of axial reinforcing ribs 26 that are injection molded and correspond to the studs 111 are further disposed on the inner wall of the ring cylinder 21, so that the ring cylinder and the studs are supported by the axial reinforcing ribs 26 on the inner side of the ring cylinder 21 to improve the structural strength of the ring cylinder, which is beneficial to meeting the structural strength requirement of the winding drum with less material, reducing the self weight of the winding drum, and reducing the production cost.

In an embodiment of the present application, preferably, an inner support frame 30 made of PBT plastic material is further disposed in the ring cylinder 21, the inner support frame 30 includes an inner support cylinder 31 and a plurality of ring-shaped support plates 32 located on an outer wall of the inner support cylinder 31, and the plurality of ring-shaped support plates 32 are uniformly arranged along a central axis of the inner support cylinder 31; the outer edge of the annular support plate 32 is abutted against the inner wall of the annular cylinder 21, and the outer edge of the annular support plate 32 is also provided with a groove 33 matched with the axial reinforcing rib 26, so that the structural strength of the annular cylinder can be further improved by arranging the inner support frame. Specifically, one end of the ring cylinder 21 is provided with a connecting ring plate 23, and the inner diameter of the ring baffle 22 at the other end of the ring cylinder 21 is equal to that of the ring cylinder 21 so as to install the inner support frame 30.

In one embodiment of the present application, preferably, the annular support plates 32 are further provided with vent grooves 34 located between the grooves 33, and the vent grooves 34 on the plurality of annular support plates 32 are correspondingly arranged to form heat dissipation grooves arranged along the central axis of the inner support cylinder 31, so that air between the annular cylinder 21 and the inner support cylinder 31 can flow along the axial direction of the inner support cylinder 31 through the vent grooves 34 to dissipate heat.

In one embodiment of the present application, preferably, an axial partition 35 located on the outer wall of the inner support cylinder 31 is disposed between two adjacent annular support plates 32, and the height of the axial partition 35 is smaller than that of the annular support plates 32; the wall of the inner support cylinder 31 is also provided with vent holes 36 positioned between the axial clapboards 35; through the arrangement of the axial partition plate 35, when the inner support frame rotates along with the ring cylinder 21, air flow between the ring cylinder 21 and the inner support cylinder 31 can be driven through the axial partition plate, and the air holes 36 in the cylinder wall of the inner support cylinder 31 can promote the air flow inside and outside the inner support cylinder 31, so that the heat dissipation of the crane winding drum in the steel wire rope winding and unwinding process is improved, and the service life of the crane winding drum is prolonged.

In one embodiment of the present application, it is preferable that a plurality of spiral baffles 37 are disposed on an inner wall of the inner support frame 31, and when the inner support frame rotates with the ring cylinder 21, the spiral baffles 37 can promote the axial flow of air in the ring cylinder 21 to facilitate heat dissipation. Preferably, the inner wall of the inner support cylinder 31 is provided with 4 spiral deflectors 37, and each spiral deflector 37 has a corresponding central angle of 90 ° on the inner support cylinder. Preferably, the inner support cylinder 31 has an inner diameter greater than the inner diameter of the connecting cylinder 24, and the spiral baffle 37 has an inner diameter along the corresponding circumference greater than the inner diameter of the connecting cylinder 24, so that the inner support cylinder does not interfere with the installation of the planetary reduction mechanism in cooperation with the ring gear 25.

In an embodiment of the application, preferably, the outer edge of each annular support plate 32 is further provided with a mounting groove 38 corresponding to the inner wall of the annular cylinder 21, and a pressure strain gauge packaged by silica gel is mounted in the mounting groove 38, so that an acting force between the annular cylinder 21 and the outer edge of the annular support plate 32 can be detected through the pressure strain gauge, that is, the stress of the crane drum in the winding and unwinding process of the steel wire rope is detected, the operation monitoring of the crane drum is realized, and the operation safety of the crane is improved. Preferably, more than three pressure strain gauges are uniformly distributed on each annular support plate, and the average acting force between the annular cylinder 21 and the annular support plate 32 is calculated through the control unit. Specifically, a data acquisition module connected with a pressure strain gauge is fixedly installed on the inner wall of the inner support cylinder 31, and the pressure strain gauge and the data acquisition module can be continuously connected with the data acquisition module through a vent hole 36.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.