CN205401365U - Detachable screw rod - Google Patents

Abstract

The utility model discloses a detachable screw rod, its characteristics are the screw rods that are formed by screw rod head and screw rod rear portion threaded connection, the drawbore is joined in marriage at its threaded connection position, is equipped with the round pin axle in the pinhole, the round pin axle by the split pin with screw rod head and the threaded connection after -fixing of screw rod rear portion, screw rod head one end is for being equipped with internal screw thread member connecting hole, the member connector of screw rod rear portion one end for being equipped with the external screw thread, member connector screw in member connecting hole is with being fixed it by round pin axle and split pin behind screw rod head and the screw rod rear portion threaded connection. Compared with the prior art, the utility model has the advantage of simple structure, easy dismounting, the good reliability, cost of maintenance is low, the installation with make conveniently, advantage that fittings life is high makes things convenient for amplitude changing device's maintenance greatly, improves security and economic nature that the hoist used.

Description

A detachable screw

technical field

The utility model relates to the technical field of the luffing mechanism of a crane, in particular to a detachable screw used for the luffing mechanism of a large and medium-sized portal crane.

Background technique

The luffing mechanism of large and medium-sized gantry cranes generally adopts the integral screw luffing technology. The integral screw is used to ensure the connection with the boom. The screw is forged.

The existing problems in the prior art are: in the inspection and maintenance process of the luffing mechanism, the entire screw rod needs to be dismantled, the process is cumbersome, requires a lot of manpower and material resources, and has great disadvantages to the service life of its accessories Even if there is a small mechanical failure of the luffing mechanism and needs to be repaired, the entire screw needs to be removed, which is time-consuming and laborious and seriously reduces the efficiency of the crane. Since the integral screw is relatively long, the overall production of the screw is harmful to the processing equipment. There are strict requirements, and the delivery cycle is also greatly restricted, which seriously affects the safety and economy of crane use.

Utility model content

The purpose of this utility model is a detachable screw designed for the deficiencies in the prior art. The screw is split into front and rear two rods, which are fixed as an integral screw by a pin after threaded connection. The maintenance requirements of the luffing mechanism, dismantling the front or rear rods of the screw to overhaul the luffing mechanism does not need to dismantle the whole screw, which saves time and effort for the inspection and maintenance of the luffing mechanism, and improves the efficiency and efficiency of the crane. Safety and reduced maintenance costs not only solve the technical problems of luffing mechanism screw repair and maintenance, but also solve the problems of screw processing and manufacturing, which greatly facilitates the processing and manufacturing of screws, and further reduces the cost of screw manufacturing and crane maintenance .

The purpose of this utility model is achieved in this way: a detachable screw, which is characterized in that the screw head is threadedly connected with the rear part of the screw, and the threaded connection part is equipped with a drilled pin hole, and a pin shaft is arranged in the pin hole , the pin shaft is fixed after the screw head is threadedly connected with the rear part of the screw by a cotter pin, and one end of the screw head is a connecting hole of a rod with internal threads; one end of the rear of the screw is a rod with external threads Connecting head, the rear part of the screw rod is fixed into a detachable screw rod by a pin shaft and a cotter pin after the rod connecting head is threadedly connected with the rod connecting hole of the screw head.

Compared with the prior art, the utility model has the advantages of simple structure, convenient assembly and disassembly, good reliability, low maintenance cost, convenient installation and manufacture, and high service life of supporting parts, which greatly facilitates the maintenance of the luffing mechanism and improves the use of the crane. The safety and economy further reduce the cost of screw production and crane maintenance.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic cross-sectional structure diagram of Fig. 1;

Fig. 3 is the structural representation of screw head;

Figure 4 is a schematic diagram of the rear structure of the screw.

detailed description

Referring to accompanying drawing 1～accompanying drawing 2, the utility model is made up of screw rod head 1 and screw rod rear part 2, and after screw rod head 1 and screw rod rear part 2 are threadedly connected, it is fixed by pin shaft 3 and cotter pin 4, described One end of the screw head 1 is a rod connecting hole 5 provided with an internal thread; one end of the rear part 2 of the screw is a rod connecting head 7 provided with an external thread; the rod connecting hole 5 and the rod connecting head 7 are matched Drill the pin hole 6, the pin hole 6 and the rod connecting hole 5 and the rod connecting head 7 are axially vertically arranged; the rod connecting head 7 is screwed into the rod connecting hole 5 to connect the screw head 1 and the screw rear part 2 Threaded to form a detachable screw, the pin shaft 3 is inserted into the pin hole 6 and fixed by the cotter pin 4.

Referring to accompanying drawing 3, one end of the screw head 1 is a rod connecting hole 5 provided with an internal thread, and the rod connecting hole 5 is provided with a pin hole 6 drilled with a rod connecting head 7, and a pin hole 6 The connecting hole 5 of the rod is arranged perpendicular to the axial direction, and the internal thread of the connecting hole 5 of the rod is processed into a trapezoidal circular thread according to the national standard "GB/T10051.5", and a certain installation margin is reserved to ensure that it is Easy to install.

Referring to accompanying drawing 4, described screw rod rear part 2 one ends are provided with the bar joint 7 of external thread, are provided with the pin hole 6 that matches with bar joint hole 5 on described bar joint 7, pin hole 6 and bar The connecting head 7 of the connecting piece is arranged vertically in the axial direction, and the external thread of the connecting piece 7 is processed into a trapezoidal circular thread matching the internal thread of the connecting hole 5 of the connecting piece according to the national standard "GB/T10051.5".

The utility model is connected and disassembled in this way: the rod joint 7 is screwed into the rod connection hole 5, and then the pin shaft 3 is inserted into the pin hole 6, and the cotter pin 4 is fixedly connected to form a rod for the luffing mechanism arm. Integral screw for frame connection. When the luffing mechanism is inspected or maintained, it is only necessary to loosen the cotter pin 4 and take out the pin shaft 3, and then rotate the screw head 1 against the direction of the trapezoidal circular thread to remove it, which greatly facilitates the maintenance of the luffing mechanism Maintenance makes the disassembly and assembly of the jib connection of the luffing mechanism very convenient, greatly improves the efficiency and safety of the crane, and further reduces maintenance costs.

The above is only a further description of the utility model, and is not intended to limit the patent, and all equivalent implementations of the utility model should be included in the scope of claims of the patent.

Claims (1)

1. A detachable screw, which is characterized in that the screw head (1) is threadedly connected with the rear part (2) of the screw, and the threaded connection part is equipped with a drill pin hole (6), and the pin hole (6) is A pin shaft (3) is provided, and the pin shaft (3) is fixed after screwing the screw head (1) and the screw rear part (2) by the cotter pin (4). One end of the screw head (1) is provided with Rod connection hole (5) with internal thread; one end of the rear part of the screw (2) is a rod connection head (7) with external thread, and the rear part of the screw (2) is connected by the rod connection head (7) and the screw After the rod connection hole (5) of the head (1) is threaded, it is fixed into a detachable screw rod by a pin shaft (3) and a cotter pin (4).