CN210290647U

CN210290647U - Injection molding type gear ring structure

Info

Publication number: CN210290647U
Application number: CN201921029117.7U
Authority: CN
Inventors: 俞霖
Original assignee: Changzhou Huiheng Electric Technology Co ltd
Current assignee: Changzhou Huiheng Electric Technology Co ltd
Priority date: 2019-07-03
Filing date: 2019-07-03
Publication date: 2020-04-10
Anticipated expiration: 2029-07-03

Abstract

The utility model relates to a ring gear structure field especially relates to an injection molding type ring gear structure, including inner circle and outer lane, the inner circle is the metal material, and the outer lane is the plastics material, the axial surface of inner circle and the axial internal surface contact of outer lane, and the axial surface of outer lane is provided with teeth of a cogwheel structure, and the inner circle is equipped with at least one groove structure with the contact surface department of outer lane. The gear ring formed by the injection molding plastic outer ring gear structure and the inner ring metal structure is simple in processing technology and less in material waste, the outer ring gear is fixed with inner ring metal through the groove structure in the molding process by adopting the groove structure, the inner ring and the outer ring do not rotate relatively when the gear ring rotates, and compared with the traditional adhesive structure, the fixing reliability is greatly improved.

Description

Injection molding type gear ring structure

Technical Field

The utility model relates to a ring gear structure field especially relates to a formula of moulding plastics ring gear structure.

Background

In the prior art, the conventional structure of the gear ring is a pure metal structure, the manufacturing process of the gear ring is that a cast iron blank is cast firstly, then the cast iron blank is machined by a lathe, a gear is machined by a hobbing machine, and finally the gear ring is formed, the manufacturing process of the gear ring is complex, the material waste is more, and the time consumption is longer; since the gear ring is generally made of cast iron, the gear ring is easily broken during machining, transportation, installation, use and the like, and after the gear ring is installed on a machine, the gear ring is also easily broken during operation.

Injection molding is a process used to mass produce parts of some complex shapes. Specifically, the plastic melted by heating is injected into a mold cavity from an injection molding machine at high pressure, and a formed product is obtained after cooling and solidification. With the development of injection molding technology, the structure combining injection molding and metal is gradually applied to various technical fields, and the plastic injection molding structure is simple, light in weight and suitable for the fields with not particularly high requirements on the strength of the gear.

The utility model discloses a chinese utility model with publication number CN205417599U, 2016, 08, 03 discloses a ring gear structure that moulds plastics and combines with metal, which comprises a metal ring gear and a ring gear that moulds plastics, the junction of the metal ring gear and the ring gear that moulds plastics is bonded by adhesive. However, the structural reliability of the bonding by the adhesive is not guaranteed, and the reliability of a system where the gear rings are located is affected by relative sliding between the inner gear ring and the outer gear ring caused by failure of the adhesive in the long-term operation process.

In view of the above problems, the designer is based on the practical experience and professional knowledge that are abundant for many years in engineering application of such products, and is actively researched and innovated in cooperation with the application of theory, so as to create an injection-molded gear ring structure, and the injection-molded gear ring structure is more practical.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing an injection molding type gear ring structure, which improves the reliability of a fixing structure of a metal ring and an injection molding gear ring.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a formula of moulding plastics ring gear structure, includes inner circle and outer lane, and the inner circle is the metal material, and the outer lane is the plastics material, and the axial surface of inner circle and the axial internal surface contact of outer lane, the axial surface of outer lane are provided with teeth of a cogwheel structure, and the contact surface department of above-mentioned inner circle and outer lane is equipped with at least one groove structure.

Further, the groove structure is arranged on the inner ring.

Furthermore, the depth direction of the groove structure extends towards the radial direction, and the groove structure penetrates through the two axial ends of the inner ring in the length direction.

Furthermore, the cross section of the groove structure is of a trapezoidal structure, the width of the notch is smaller than that of the groove bottom, and the side wall of the groove structure inclines towards the notch.

Further, the axial cross section of the groove structure is a major arc structure.

Further, the axial cross section of the contact surface of the inner ring and the outer ring is a drum-shaped structure with a convex middle part, and the other one is a concave structure attached to the drum-shaped structure.

Further, both ends of the drum-shaped structure are symmetrically arranged.

Furthermore, fixing holes are uniformly distributed on the side surface of the inner ring.

Further, the fixing hole and the groove structure are arranged in a staggered manner in the axial direction of the inner ring.

The utility model has the advantages that: according to the gear ring formed by the injection molding plastic outer ring gear structure and the inner ring metal structure, the processing technology is simple, the waste material is less, the groove structure is adopted, the outer ring gear is fixed with the inner ring metal through the groove structure in the molding process, when the gear ring rotates, the inner ring and the outer ring do not rotate relatively, and compared with the traditional adhesive structure, the fixing reliability is greatly improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of an injection-molded ring gear according to a first embodiment;

FIG. 2 is an enlarged view of FIG. 1 at A;

fig. 3 is an axial sectional view of the injection-molded ring gear structure of the present invention;

FIG. 4 is a perspective view of an injection molded ring gear structure according to a first embodiment;

FIG. 5 is a schematic structural view of an injection-molded gear ring in the second embodiment;

fig. 6 is an enlarged view of fig. 5 at B.

Reference numerals: 1-inner ring, 2-outer ring, 3-fixed hole, 11-groove structure, 111-trapezoidal notch, 112-trapezoidal groove bottom, 113-cylindrical groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are the directions or positional relationships indicated on the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the device or element indicated must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1, the injection-molded gear ring structure is composed of an inner ring 1 made of metal and an outer ring 2 made of plastic, an axial outer surface of the inner ring 1 is in contact with an axial inner surface of the outer ring 2, a gear tooth structure is arranged on an axial outer surface of the outer ring 2, and at least one groove structure 11 is arranged on a contact surface between the inner ring 1 and the outer ring 2. Compare with traditional pure metal ring gear, the utility model discloses the inner circle 1 of metal material and the 2 structures of outer lane of plastics material that adopt, because the teeth of a cogwheel structure sets up on the plastics material, and the plastics material adopts the processing mode of moulding plastics and the inner circle 1 of the metal material that has processed to place shaping together in the mould, and it is very few with the extravagant material of traditional system tooth machine, the speed of processing is faster moreover. Wherein the plastic material is selected according to different strength requirements. And the groove structure 11 processed on the axial outer circumference of the metal inner ring 1 in advance is filled with the plastic material during injection molding, and is integrated with the outer ring 2, so that compared with the documents cited in the background technology, the groove structure does not need to use glue, and is firmer and more reliable than the structure of a gluing mode.

As shown in fig. 2, a groove structure 11 is provided on the inner ring 1. The depth direction of the groove structure 11 extends radially, and the groove structure 11 penetrates through both ends of the inner ring 1 in the axial direction in the length direction thereof. The cross section of the groove structure 11 is a trapezoid structure, the width of the trapezoid notch 111 is smaller than the width of the trapezoid groove bottom 112, and the side wall of the groove structure 11 inclines towards the notch.

The purpose that this kind of structure set up lies in, through the contact of the two slope lateral walls of the lug that outer lane 2 stretched into in

groove structure

11 and 1 groove structure lateral walls of inner circle, makes outer lane 2 not take place to give up in the radial, and when metal inner circle 1 expend with heat and contract with cold and take place the micro deformation, outer lane structure 2 can follow inner circle 1 shrink under groove structure 11's effort to guarantee the stability of ring gear structure.

As shown in fig. 3, as seen from the axial cross-sectional view of the injection-molded ring gear structure, the center of the inner ring 1 is projected toward the outer ring 2, and the contact surface between the outer ring 2 and the inner ring 1 is fitted to the projected structure of the inner ring 1. The function that this kind of structure set up lies in, prevents that inner circle 1 and outer lane 2 from taking place relative slip in the axial direction, because this arch is middle protruding, bilateral symmetry, no matter receive the axial force of any direction between outer lane 2 and the inner circle 1, the both sides face of protruding structure all can provide a counter force, and two power are balanced, do not take place relative slip between inner circle 1 and the outer lane 2, has further strengthened the reliability of moulding plastics formula ring gear structure.

As shown in fig. 4, fixing holes 3 are uniformly distributed on the side surface of the inner ring 1 made of the metal material, the fixing holes 3 are arranged on the inner ring 1 made of the metal material and used for being connected with an external rotating mechanism, and the fixing holes 3 are arranged on the metal material due to the good strength of the metal material. The fixing holes 3 are uniformly distributed on the two side faces of the inner ring 1 in the circumferential direction, and the stress is more uniform. Because the inner ring 1 is provided with the groove structure 11, in order to ensure that the stress of the inner ring 1 is uniform, the fixing holes 3 and the groove structure 11 are arranged in a staggered manner in the axial direction of the inner ring 1.

It should be noted that fig. 3 shows only one convex structure of the inner ring 1, and a structure in which the inner ring 1 is concave and the outer ring 2 is convex may be provided.

Example two

The utility model discloses a second embodiment is shown in fig. 5 and fig. 6, in this embodiment, inner circle 1 is the same with the material of outer lane 2, the structure of gear is the same, fixed orifices 3's structure is the same, 1 axial cross-sectional view structure of inner circle is the same, no longer describe here, as shown in fig. 6, groove structure 11 of this embodiment is 113 in cylindrical groove, this 113 axial cross-section in cylindrical groove is the major arc shape, the width that cylindrical groove 113 opened partial notch is less than the diameter in 1 middle cylindrical groove 113 of inner circle, this kind of setting is unanimous with the principle of embodiment one, at radial fixed outer lane 2, but add man-hour only need once alright shaping with the car, compare the processing mode that mills many times in the embodiment one convenient and fast more.

It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a formula of moulding plastics ring gear structure, includes inner circle (1) and outer lane (2), its characterized in that, inner circle (1) are the metal material, and outer lane (2) are the plastics material, the axial surface of inner circle (1) and the axial internal surface contact of outer lane (2), and the axial surface of outer lane (2) is provided with teeth of a cogwheel structure, the contact surface department of inner circle (1) and outer lane (2) is equipped with at least one groove structure (11).

2. An injection-moulded ring gear structure according to claim 1, characterised in that the groove structure (11) is provided on an inner ring (1).

3. An injection-molded ring gear structure according to claim 2, wherein the groove structures (11) extend radially in the depth direction, and the groove structures (11) penetrate the inner ring (1) at both axial ends in the length direction thereof.

4. An injection-moulded ring gear structure according to claim 3, characterised in that the groove structure (11) is trapezoidal in cross-section and the width of the slot is smaller than the width of the slot bottom, the side walls of the groove structure (11) sloping towards the slot bottom.

5. An injection-molded ring gear structure according to claim 3, wherein the axial cross-section of the groove structure (11) is a major arc structure.

6. An injection moulded ring gear structure according to claim 4 or 5, wherein either of the inner and outer rings (1, 2) has a convex drum-shaped configuration in the middle in axial cross-section at their interface, the other having a concave configuration conforming to the drum-shaped configuration.

7. An injection molded ring gear structure according to claim 6, wherein the drum structure is symmetrically disposed at both ends.

8. An injection-molded ring gear structure according to claim 1, wherein fixing holes (3) are evenly distributed on the side surface of the inner ring (1).

9. An injection-molded ring gear structure according to claim 8, wherein the fixing hole (3) is arranged offset from the groove structure (11) in an axial direction of the inner ring (1).