CN217874066U

CN217874066U - Worm wheel for speed reducer

Info

Publication number: CN217874066U
Application number: CN202221556787.6U
Authority: CN
Inventors: 孙晶
Original assignee: Tianjin Jingyang Machinery Complete Equipment Co ltd
Current assignee: Tianjin Jingyang Machinery Complete Equipment Co ltd
Priority date: 2022-06-21
Filing date: 2022-06-21
Publication date: 2022-11-22
Anticipated expiration: 2032-06-21

Abstract

The utility model relates to a worm wheel for speed reducer, including worm wheel body, annular apron, the worm wheel body includes rim, wheel core periphery interference cover has the rim, and the interference faying face welded fastening of wheel core and rim, is equipped with a plurality of welded holes that are the circumference and distribute on the interference faying face, the welded hole comprises two semicircular holes, and two semicircular holes set up respectively on wheel core and rim, fixedly connected with annular apron can be dismantled respectively to the both sides of worm wheel body. The utility model discloses a setting of annular apron, after the welding is accomplished, only need with the annular apron cover the welding groove position can, need not to polish to the welding position again, reduced intensity of labour, improved work efficiency, reached pleasing to the eye effect simultaneously. The annular cover plate can be designed into various colors according to requirements; through the setting of welding hole, increase welding area, make the welding more firm.

Description

Worm wheel for speed reducer

Technical Field

The utility model relates to a worm gear manufacturing technical field, in particular to worm wheel for speed reducer.

Background

The worm wheel is used as a general mechanical part and is mainly used for worm gear speed reducers, worm wheel screw rod lifters, transmission devices and the like. The existing advanced worm gear structure makes up the defects of poor hardness, tensile strength, mechanical property and the like of a single material by compounding steel and copper.

At present, a bimetal worm gear is manufactured by adopting interference fit of a copper rim and a ferrous metal wheel core, then a gap is welded by welding to realize the fixation of the rim and the wheel core, but after the welding is finished, the welded part needs to be polished, so that the appearance surface is kept attractive, the working efficiency is low, and the labor intensity is high.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is to solve the problem mentioned in the background art, overcome the not enough that exist among the prior art.

In order to realize the above-mentioned purpose, the embodiment of the utility model provides a worm wheel for speed reducer, including worm wheel body, annular apron, the worm wheel body includes rim, wheel core periphery interference cover has the rim, and the interference faying face welded molding of wheel core and rim is equipped with a plurality of welded holes that are the circumference and distribute on the interference faying face, the welded hole comprises two semi-circular holes, and two semi-circular holes set up respectively on wheel core and rim, fixedly connected with annular apron can be dismantled respectively to the both sides of worm wheel body, the annular apron covers the welding part of interference faying face, be equipped with four first locating holes that are the circumference and distribute on the wheel core, be equipped with four second locating holes that are the circumference and distribute on the rim, when first locating hole and second locating hole position are one to one, the alignment of semi-circular hole on wheel core and the rim makes up and forms the welded hole.

Preferably, in any of the above schemes, the circumferential surfaces of both sides of the interference joint surface are provided with welding grooves to form welding parts, the welding grooves are communicated with the welding holes, and the welding grooves and the welding holes are welded by welding wires.

Preferably, in any one of the above embodiments, the cross section of the weld groove has a V-shaped structure.

The wheel comprises a wheel rim and a wheel core, wherein the wheel rim and the wheel core are arranged on the outer side of a welding groove, the wheel rim and the wheel core are respectively provided with at least two threaded blind holes which are uniformly distributed, the part, corresponding to the threaded blind holes, of the annular cover plate is provided with a connecting hole, and the connecting hole is connected with the corresponding threaded blind holes through screws, so that the annular cover plate is fixed with the wheel rim and the wheel core.

Preferably, in any one of the above schemes, two key slots are uniformly distributed on the inner hole wall of the wheel core.

Compared with the prior art, the utility model has the advantages and beneficial effects do:

1. through the setting of annular cover plate, after the welding is accomplished, only need with annular cover plate cover the welding groove position can, need not to polish to the welding position again, reduced intensity of labour, improved work efficiency, reached pleasing to the eye effect simultaneously. The annular cover plate can be designed into various colors according to requirements; through the setting of welding hole, increase welding area, it is more firm to make the welding.

2. Through the one-to-one correspondence of the first positioning hole and the second positioning hole, the fact that the semicircular holes in the wheel rim and the wheel core are aligned to form a welding hole when the worm wheel is installed is guaranteed, and meanwhile the overall weight of the worm wheel body can be reduced due to the arrangement of the first positioning hole and the second positioning hole.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic overall structure diagram of a worm wheel for a speed reducer according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 without the annular cover plate;

fig. 3 isbase:Sub>A sectional view taken along the linebase:Sub>A-base:Sub>A of fig. 1.

Wherein: 1. a wheel core; 2. a rim; 3. an annular cover plate; 4. a second positioning hole; 5. a first positioning hole; 6. welding a groove; 7. a keyway; 8. and (7) welding the hole.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

As shown in fig. 1-3, the embodiment of the utility model provides a worm wheel for speed reducer, including the worm wheel body, annular cover plate 3, the worm wheel body includes rim 2, wheel core 1, 1 periphery interference cover of wheel core has rim 2, and the interference faying face welded fastening of wheel core 1 and rim 2, be equipped with a plurality of welded holes 8 that are the circumference and distribute on the interference faying face, welded holes 8 comprises two semicircular holes, two semicircular holes set up respectively on wheel core 1 and rim 2, fixedly connected with annular cover plate 3 can be dismantled respectively to the both sides of worm wheel body, annular cover plate 3 covers the welding part of interference faying face, be equipped with four first locating hole 5 that are the circumference and distribute on wheel core 1, be equipped with four second locating hole 4 that are the circumference and distribute on rim 2, first locating hole 5 and second locating hole 4 position one pair of corresponding, the aligned combination of semicircular hole on wheel core 1 and the rim 2 forms welded holes 8. The wheel rim 2 is made of a green steel material, and the wheel core 1 is made of a nodular cast iron material.

Furthermore, the circumferential surfaces of two sides of the interference joint surface are provided with welding grooves 6 to form welding positions, the welding grooves 6 are communicated with the welding holes 8, and the welding grooves 6 and the welding holes 8 are welded through welding wires.

Further, the cross section of the weld groove 6 is of a V-shaped structure.

In the present embodiment, when the weld groove 6 is welded, the welding surface on which the welding wire is deposited does not exceed the depth of the weld groove 6.

And (3) heating and insulating the processed wheel rim 2 to expand the wheel rim 2, then sleeving the wheel rim 2 on the wheel core 1 at normal temperature, and shrinking the wheel rim 2 after cooling to realize interference mounting.

After the welding groove 6 and the welding hole 8 are welded through welding wires, only the annular cover plate 3 needs to cover the welding groove part, the welding part does not need to be polished, the labor intensity is reduced, the working efficiency is improved, and meanwhile, the attractive effect is achieved. The annular cover plate 3 can be designed in various colors as required.

The plurality of welding holes 8 are formed in the interference joint surface, so that welding is firmer, and radial displacement of the wheel rim 2 relative to the wheel core 1 is limited.

At least two threaded blind holes which are uniformly distributed are respectively arranged on the side walls of the wheel rim 2 and the wheel core 1 outside the welding groove 6, connecting holes are arranged at the positions, corresponding to the threaded blind holes, on the annular cover plate 3, and the connecting holes are connected with the corresponding threaded blind holes through screws, so that the annular cover plate 3 is fixed with the wheel rim 2 and the wheel core 1.

Annular apron 3 adopts the screw connection with the worm wheel body, and it is convenient to dismantle the installation, and easy operation is favorable to improving work efficiency.

The inner hole wall of the wheel core 1 is provided with two key grooves 7 which are evenly distributed on the circumference. One of the key slots 7 is used for standby, when one of the key slots 7 is damaged, the wheel core 1 does not need to be replaced, and only the wheel core 1 needs to be rotated to use the other key slot 7. Which is advantageous for reducing the replacement frequency of the wheel core 1.

In this embodiment, when wheel core 1 and rim 2 were installed, be equipped with supporting auxiliary positioning structure, auxiliary positioning structure includes the first locating pin with first locating hole 5 one-to-one, the second locating pin with second locating hole 4 one-to-one. During installation, the first positioning holes 5 in the wheel core 1 are sleeved on the corresponding first positioning pins, and then the second positioning holes 4 in the wheel rim 2 are sleeved on the second positioning pins, so that the semi-circular holes in the wheel rim 2 and the wheel core 1 are aligned to form the welding holes 8.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

It will be understood by those skilled in the art that the invention, including any combination of the elements of the above description and the detailed description and illustrated in the accompanying drawings, is not limited to the details and should not be construed as limited to the embodiments set forth herein for the sake of brevity. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the invention, and that those skilled in the art may make variations, modifications, substitutions and alterations herein without departing from the spirit and scope of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The worm wheel for the speed reducer is characterized by comprising a worm wheel body and an annular cover plate, wherein the worm wheel body comprises a wheel rim and a wheel core, the periphery of the wheel core is in interference fit with the wheel rim, the interference fit surface of the wheel core and the wheel rim is welded and formed, a plurality of welding holes distributed in the circumferential direction are formed in the interference fit surface, each welding hole is composed of two semicircular holes, the two semicircular holes are respectively formed in the wheel core and the wheel rim, the annular cover plate fixedly connected with is respectively arranged on two sides of the worm wheel body, the annular cover plate covers the welding part of the interference fit surface, four first positioning holes distributed in the circumferential direction are formed in the wheel core, four second positioning holes distributed in the circumferential direction are formed in the wheel rim, and when the positions of the first positioning holes and the positions of the second positioning holes correspond to each other, the semicircular holes in the wheel core and the wheel rim are aligned and combined to form the welding holes.

2. The worm wheel for a reduction gear according to claim 1, wherein the circumferential surfaces on both sides of the interference fit surface are provided with weld grooves to form weld portions, the weld grooves communicate with the weld holes, and the weld grooves and the weld holes are welded by a welding wire.

3. A worm wheel for a speed reducer as set forth in claim 2, wherein said weld groove has a V-shaped cross section.

4. The worm wheel for the speed reducer as claimed in claim 2 or 3, wherein the rim outside the weld groove and the side wall of the wheel core are respectively provided with at least two threaded blind holes which are uniformly distributed, the annular cover plate is provided with a connecting hole at a position corresponding to the threaded blind holes, and the connecting hole is connected with the corresponding threaded blind holes through screws so that the annular cover plate is fixed with the rim and the wheel core.

5. A worm gear for a speed reducer as recited in claim 4, wherein the inner hole wall of the core is provided with two key grooves uniformly distributed circumferentially.