CN201065926Y

CN201065926Y - Screw rod drive device

Info

Publication number: CN201065926Y
Application number: CNU200720124617XU
Authority: CN
Inventors: 彭李
Original assignee: CISDI Engineering Co Ltd
Current assignee: CISDI Engineering Co Ltd
Priority date: 2007-06-29
Filing date: 2007-06-29
Publication date: 2008-05-28
Anticipated expiration: 2017-06-29

Abstract

The utility model relates to a drive unit, in particular to a screw drive unit, belonging to the technical field of mechanical engineering, which is characterized in that: a hollow axle of a wormgear penetrates out of the box body, and forms together with a worm an integral member, which is arranged in the box body after assembly; one end of the worm is connected with the input shaft of an external torque, a screw is inserted into the hollow axle of the worm gear and is fixed on the worm gear by a nut arranged on the shaft end of the screw. The utility model has the advantages of reducing the workload of on-site mounting, improving the mounting quality, and generating no negative influence on the original meshing precision of the worm and the worm gear due to the fast and convenient assembly and disassembly of the screw; therefore, the utility model is applicable to the places where convenient replacement of screws is required, especially the parts driven by screws on a crystallizer.

Description

A kind of spiro driving device

Affiliated technical field

The utility model belongs to mechanical technical field, relates to a kind of drive unit, particularly spiro driving device.

Technical background

For satisfying product needed, the inner cavity size of crystallizer often need be adjusted, and the crystallizer spiro driving device is in order to realize that the inner cavity size of adjusting crystallizer changes.The screw rod rotation drives the nut motion on the screw rod, thereby the narrow limit opening size of crystallizer is adjusted, and makes the dimensional changes of crystallizer, therefore, has satisfied the needs of different casting blank size.Existing crystallizer needs when screw rod 1 is installed to fit together with worm gear 2-1 earlier, and then is installed in the casing 6 with spiro driving device as shown in Figure 1, again end cap 3 is installed in closed box on the casing 6.With worm screw 5 external torque is passed to the worm gear 2-1 that is meshed, by worm gear 2-1 moment of torsion is passed to the screw rod 1 that matches again, make screw rod 1 rotation, drive the nut motion on the screw rod.In engineering is used, for satisfying product needed, often to change screw rod 1, therefore above-mentioned part screw rod 1, worm gear 2-1 and end cap 3 need be taken apart, the screw rod 1 and the worm gear 2-1 that will change then fit together, and install with end cap 3 and casing 6 again.Changing screw rod 1 so not only wastes time and energy very inconveniently, and influences the original accuracy of mesh of worm and worm gear, influences the dimensional accuracy of crystallizer.

Summary of the invention

The utility model provides a kind of spiro driving device, the device that purpose is convenient to change screw rod fast and is not influenced the original accuracy of mesh of worm and worm gear.The utility model can reduce the on-site installation work amount, improves installation quality, simultaneously screw, tear open and conveniently influence the original accuracy of mesh of worm and worm gear fast and not, be applicable to the place of the bolt rod driving in the place that need be convenient for changing screw rod, particularly crystallizer.

The technological scheme that the utility model technical solution problem is adopted is: the hollow shaft of worm gear passes casing, constitutes one-piece element with worm screw, assembles the rear enclosed casing, and screw rod can penetrate in the hollow shaft of worm gear easily.When changing screw rod, only former screw rod is extracted out from the hollow shaft of worm gear, new screw rod is penetrated in the mandrel of worm gear and get final product.

Description of drawings

Fig. 1 is the sectional view of existing apparatus

Fig. 2 is a sectional view of the present utility model

Fig. 3 is an A-A sectional view of the present utility model

Among the figure, part 1 is a screw rod, and part 2-1 and 2-2 are worm gear, and part 3 is an end cap, and part 4 is a pin, and part 5 is a worm screw, and part 6 is a casing, and part 7 is a nut.

Embodiment

Below in conjunction with accompanying drawing specific embodiment of the utility model is described further:

Accompanying drawing 2 is a kind of embodiment of the design.Wherein the hollow shaft of worm gear 2-2 passes casing, constitute one-piece element with worm screw 5, be installed in after assembling in the casing 6, the end of worm screw 5 is connected with the external torque input shaft, screw rod 1 penetrates in the hollow shaft of worm gear 2-2, and is fixed on the worm gear 2-2 by the nut 7 that is installed on screw rod 1 axle head.

Accompanying drawing 2 rotates for preventing screw rod 1 for after the size adjusting of crystallizer is finished, and externally worm screw 5 is pinned with pin 4 in the connecting part of the axle head of torque input shaft and casing 6.

Worm screw 5 passes to external torque the worm gear 2-2 that is meshed, moment of torsion is passed to the screw rod 1 that matches by worm gear 2-2 again, make screw rod 1 rotation, drive the nut motion on the screw rod, thereby the narrow limit size of crystallizer is adjusted, make the dimensional changes of crystallizer, therefore, satisfy the needs of strand size.After the size adjusting of crystallizer is finished, rotate for preventing screw rod 1, externally worm screw 5 is pinned with pin 4 in the connecting part of the axle head of torque input shaft and casing 6, so screw rod 1 can not rotate yet.

The utility model can assemble worm gear, worm screw and casing in factory, can improve the worm and worm gear accuracy of mesh, only needs to install screw rod at the use scene, and worm screw one end is connected with the external torque input shaft gets final product.The utility model can reduce the on-site installation work amount, improves installation quality, simultaneously screw, tear open and conveniently influence the original accuracy of mesh of worm and worm gear fast and not, be applicable to the place of the bolt rod driving in the place that need be convenient for changing screw rod, particularly crystallizer.

Claims

1. spiro driving device, form by worm gear, worm screw and screw rod, it is characterized in that: the hollow shaft of worm gear passes casing, constitute one-piece element with worm screw, be installed in the casing after assembling, the end of worm screw is connected with the external torque input shaft, and screw rod penetrates in the hollow shaft of worm gear, and is fixed on the worm gear by the nut that is installed on the screw rod axle head.

2. spiro driving device according to claim 1 is characterized in that: externally worm screw is pinned with pin in the connecting part of the axle head of torque input shaft and casing.