Large-modulus hardened gear ring structure for reducing broken cutting

Abstract

The large-modulus hardened gear ring structure comprises a gear ring and gear teeth arranged on the inner wall of the gear ring, one end of each gear tooth is a first tooth end, the other end of each gear tooth is a second tooth end, a first step is arranged on one side of each first tooth end, the first step is arranged on the inner wall of the gear ring, and the second step is arranged on the inner wall of the gear ring. A cutting groove is further formed between the first tooth end and the first step and connected between the first tooth end and the first step in a transition mode, the side face, close to the first tooth end, of the cutting groove and the axial end face of the first tooth end are located on the same vertical face, and the bottom end of the first step and the tooth root of the first tooth end are located on the same vertical face. A second step is arranged at the end, away from the first step, of the gear ring and arranged at the joint of the second tooth end and the gear ring, and the axial end face of the second step and the axial end face of the second tooth end are located on the same horizontal plane. According to the device, broken cutting caused by heat treatment deformation of the first tooth end and the second tooth end is reduced, so that the production efficiency of the large-modulus hardened gear ring is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of large-module hardened gear rings, and in particular relates to a large-module hardened gear ring structure for reducing chipping and cutting. Background Art

[0002] The ring gear is inserted into the outer edge of the flywheel after being heated, and fastened to the outer edge of the flywheel after cooling. It is used to mesh with the starter gear, drive the crankshaft to rotate, and start the engine. In order to meet the comprehensive performance, the large-module ring gear adopts the conventional production process of blank forging, blank inspection, tempering treatment, lathe processing, gear hobbing, drilling, quenching treatment, high-temperature tempering, flaw detection, testing, oiling and packaging.

[0003] In the prior art, when finishing large-module gear rings, due to the deformation of the large-module gear rings during heat treatment, intermittent chipping often occurs at the tooth end 100 during the cutting process. This chipping directly leads to a decrease in the production efficiency of the large-module gear rings, and a shortened life of the cutting tool, and the machining accuracy of the large-module gear rings cannot be guaranteed. In summary, there is an urgent need for a large-module hardened gear ring structure for reducing chipping. Utility Model Content

[0004] In order to solve some or all of the technical problems existing in the above-mentioned prior art, the present invention provides a large-module hardened gear ring structure for reducing chipping and cutting, the large-module hardened gear ring structure for reducing chipping and cutting comprises a gear ring, gear teeth arranged on the inner wall of the gear ring, one end of the gear teeth is a first tooth end, and the other end is a second tooth end, a first step is arranged on one side of the first tooth end, the first step is arranged on the inner wall of the gear ring, a groove is further arranged between the first tooth end and the first step, the groove transitionally connects between the first tooth end and the first step, the side surface of the groove close to the first tooth end and the axial end surface of the first tooth end are located in the same vertical plane, and the bottom end of the first step and the tooth root of the first tooth end are located in the same vertical plane;

[0005] The gear ring is provided with a second step at one end away from the first step. The second step is opened at the connection between the second tooth end and the gear ring. The axial end surface of the second step is in the same horizontal plane as the axial end surface of the second tooth end.

[0006] Furthermore, in the above-mentioned large-module hardened gear ring structure for reducing chipping and cutting, there is an arc-shaped transition between the cutting groove and the first step.

[0007] Furthermore, in the above-mentioned large-module hardened gear ring structure for reducing chipping cutting, a first chamfer is provided between the bottom of the groove and the side of the groove close to the first tooth end, and between the bottom of the groove and the side of the groove close to the first step.

[0008] Furthermore, in the above-mentioned large-module hardened ring gear structure for reducing chipping and cutting, a second chamfer is provided between the second step and the ring gear.

[0009] The large-module hardened gear ring structure for reducing chipping and cutting of the utility model has the following advantages and beneficial effects:

[0010] This structure provides a first step on one side of the first tooth end and a second step on the end of the gear ring away from the first step, thereby reducing the chipping and cutting of the first tooth end and the second tooth end caused by heat treatment deformation, thereby improving the production efficiency of the large-module hardened gear ring and the service life of the tool for processing the large-module hardened gear ring, achieving the effect of saving costs and ensuring the processing accuracy of the machine tool. It has a simple structure, is easy to process, and has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only used to further understand the embodiments of the present invention and constitute part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0012] Figure 1 It is a structural diagram of a gear ring in the prior art;

[0013] Figure 2 yes Figure 1 A partial enlarged view of middle III;

[0014] Figure 3 This is a schematic diagram of the structure of a large-module hardened gear ring structure for reducing chipping and cutting in the present invention;

[0015] Figure 4 yes Figure 3 A partial enlarged view of middle Ⅰ;

[0016] Figure 5 yes Figure 3 A partial enlarged view of middle II.

[0017] Description of reference numerals:

[0018] 1-tooth ring, 2-tooth, 21-first tooth end, 22-second tooth end, 3-first step, 4-second step, 41-second chamfer, 5-groove, 51-first chamfer, 100-tooth end. DETAILED DESCRIPTION

[0019] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will provide a clear and complete description of the technical solutions of the present invention in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0020] like Figure 1 、 Figure 2 、 Figure 3 As shown, the utility model discloses a large-module hardened gear ring structure for reducing chipping and cutting, comprising a gear ring 1, gear teeth 2 arranged on the inner wall of the gear ring 1, the gear teeth 2 are evenly arranged on the inner wall of the gear ring 1 along the axis of the gear ring 1, one end of the gear teeth 2 is a first tooth end 21, and the other end is a second tooth end 22, a first step 3 is provided on one side of the first tooth end 21, the first step 3 is provided on the inner wall of the gear ring 1, a groove 5 is further provided between the first tooth end 21 and the first step 3, the depth of the groove 5 is set according to the gear rings of different shapes and sizes during actual use, as long as it is satisfied that the chipping and cutting caused by the deformation of the first tooth end 21 due to heat treatment can be avoided during the cutting process, the groove 5 is transitionally connected between the first tooth end 21 and the first step 3, and the groove 5 is close to the first tooth end 21. The side surface of the tooth end 21 and the axial end face of the first tooth end 21 are located in the same vertical plane, and the bottom end of the first step 3 and the tooth root of the first tooth end 21 are located in the same horizontal plane; a second step 4 is provided at one end of the gear ring 1 away from the first step 3, and the second step 4 is opened at the connection between the second tooth end 22 and the gear ring 1. The distance between the axial end face of the second step 4 and the end face of the gear ring 1 is set according to the gear rings of different shapes and sizes during actual use, as long as it is satisfied that the second tooth end 22 can be avoided from being chipped and cut due to heat treatment deformation during the cutting process. In this embodiment, the axial end face of the second step 4 and the axial end face of the second tooth end 22 are in the same vertical plane. Similarly, this structure can also be used to solve the chipping and cutting of external teeth due to heat treatment deformation.

[0021] Furthermore, in the large-module hardened gear ring structure for reducing chipping and cutting of the present invention, an arc-shaped transition is formed between the cutting groove 5 and the first step 3 .

[0022] Furthermore, in the large-module hardened gear ring structure of the present invention for reducing chipping and cutting, a first chamfer 51 is provided between the bottom of the groove 5 and the side of the groove 5 close to the first tooth end 21, and between the bottom of the groove 5 and the side of the groove 5 close to the first step 3.

[0023] Furthermore, in the large-module hardened ring gear structure for reducing chipping and cutting of the present invention, a second chamfer 41 is provided between the second step 4 and the ring gear 1 .

[0024] In summary, compared with the prior art, the large-module hardened gear ring structure of the present invention for reducing chipping and cutting has the following advantages and beneficial effects:

[0025] This structure provides a first step 3 on one side of the first tooth end 21 and a second step 4 on the end of the gear ring 1 away from the first step 3, thereby reducing the chipping and cutting of the first tooth end 21 and the second tooth end 22 caused by heat treatment deformation, thereby improving the production efficiency of the large-module hardened gear ring and the service life of the tool for processing the large-module hardened gear ring, achieving the effect of saving costs and ensuring the processing accuracy of the machine tool. It has a simple structure, is easy to process, and has good practicality.

[0026] It should be noted that, in this document, unless otherwise expressly specified or limited, the term "connected" or its synonyms should be interpreted broadly. For example, "connected" can mean a fixed or removable connection; a mechanical or electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication between two elements or the interaction between two elements. A person of ordinary skill in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances. Furthermore, expressions such as "first" and "second" are used solely to distinguish one entity or operation from another and do not necessarily require or imply any actual relationship or order between these entities or operations. Furthermore, the terms "include," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Furthermore, terms such as "front," "rear," "left," "right," "upper," and "lower" herein refer to the positions shown in the accompanying drawings.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A large-module hardened gear ring structure for reducing chipping, the large-module hardened gear ring structure for reducing chipping comprising a gear ring, gear teeth disposed on an inner wall of the gear ring, one end of the gear teeth being a first tooth end and the other end being a second tooth end, characterized in that: A first step is provided on one side of the first tooth end, the first step being provided on the inner wall of the gear ring, a groove is further provided between the first tooth end and the first step, the groove transitionally connecting between the first tooth end and the first step, a side surface of the groove close to the first tooth end and an axial end surface of the first tooth end being located in the same vertical plane, and a bottom end of the first step and a tooth root of the first tooth end being located in the same vertical plane; The gear ring is provided with a second step at one end away from the first step. The second step is opened at the connection between the second tooth end and the gear ring. The axial end surface of the second step is in the same horizontal plane as the axial end surface of the second tooth end.

2. The large-module hardened gear ring structure for reducing chipping according to claim 1, characterized in that: There is an arc-shaped transition between the cutting groove and the first step.

3. The large-module hardened gear ring structure for reducing chipping according to claim 1, characterized in that: A first chamfer is provided between the bottom of the groove and a side of the groove close to the first tooth end, and between the bottom of the groove and a side of the groove close to the first step.

4. The large-module hardened gear ring structure for reducing chipping and cutting according to claim 1, characterized in that: A second chamfer is provided between the second step and the gear ring.

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