Impact gear structure

Abstract

The application discloses an impact gear structure, which comprises a static impact gear and a dynamic impact gear, convex tooth parts are formed on opposite sides of the static impact gear and the dynamic impact gear, the two convex tooth parts can be periodically engaged with rotation of the dynamic impact gear, the convex tooth part comprises a plurality of annularly-distributed teeth, each tooth comprises a contact slope and a tooth top end located at the edge of the contact slope, and the end points of the tooth top end are kept on the same horizontal plane; the static impact gear and the dynamic impact gear are in surface-to-surface contact, that is, the whole end surface of one tooth top end is in contact with the contact slope and the tooth top end of the other convex tooth part, and in the same way, one contact slope is in surface-to-surface contact with another contact slope, so that the contact area of the two convex tooth parts can be effectively increased, the top point is prevented from being continuously abraded, and the service life of the impact gear is prolonged.

Description

Technical Field

[0001] This application relates to the field of impact gear technology, and in particular to an impact gear structure. Background Technology

[0002] As disclosed in the oil leak prevention impact drill with announcement number CN202321790239.4, based on common knowledge, the impact gear used in the impact drill generally includes a static impact gear and a moving impact gear that cooperate with each other. The static and moving impact gears are in contact and pressed together, and both have meshing convex teeth. When the moving impact gear rotates, due to the presence of the convex teeth, the moving impact gear can periodically reciprocate axially under the guidance of the convex teeth, thus achieving the impact function.

[0003] Due to limitations in milling processes, the tips of traditional impact gears are not on the same horizontal plane; they typically have a convex outer ring and a concave inner ring. This results in point contact between the moving and stationary impact gears during operation, causing continuous wear at the highest point of the tooth tips. Consequently, the impact stroke is reduced, requiring regular replacement of worn impact gears and resulting in a shorter service life.

[0004] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is the closest prior art to this application. Summary of the Invention

[0005] Based on this, this application provides an impact gear structure to solve one of the above-mentioned technical problems.

[0006] The technical solution adopted by this application to solve its technical problem is: an impact gear structure, including: a static impact gear and a dynamic impact gear, wherein the static impact gear and the dynamic impact gear have convex teeth on opposite sides, and the two convex teeth can periodically mesh with the rotation of the dynamic impact gear. The convex teeth include a plurality of annularly distributed teeth, and each tooth includes a contact slope and a tooth tip located at the edge of the contact slope. The endpoints of the tooth tips are kept on the same horizontal plane. The static impact gear and the dynamic impact gear are in surface-to-surface contact, that is, the entire end face of one tooth tip contacts the contact slope and tooth tip of the other convex tooth, and similarly, one contact slope is in surface-to-surface contact with another contact slope.

[0007] In some embodiments, both the static impact gear and the dynamic impact gear have mounting holes at their centers, and the protruding teeth are distributed around the mounting holes.

[0008] In some embodiments, a step is further formed on one side of the tooth tip, the slope of the step being 70-80 degrees, and the slope of the contact slope being 30-45 degrees.

[0009] In some embodiments, a limiting plane is formed on the inner wall of the mounting hole of the static impact gear.

[0010] The beneficial effects of this application are as follows: through mold forming, the tooth tips on the static impact gear and the dynamic impact gear are kept on the same horizontal plane, and the two convex teeth are always in surface-to-surface contact when they mesh, and the two contact slopes are also in surface-to-surface contact, which effectively increases the contact area of ​​the two convex teeth, prevents the apex from being continuously worn, and can extend the service life of the impact gear. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a top view of the static impact gear of this application.

[0013] Figure 2 This is a cross-sectional schematic diagram of the static impact gear of this application.

[0014] Figure 3 This is a bottom view of the static impact gear of this application.

[0015] Figure 4 This is a top view schematic diagram of the dynamic impact gear of this application.

[0016] Figure 5 This is a cross-sectional schematic diagram of the dynamic impact gear of this application.

[0017] The following are the symbols in the attached diagram: 1. Static impact gear, 2. Dynamic impact gear, 3. Protruding tooth, 4. Contact slope, 5. Tooth tip, 6. Mounting hole, 7. Step, 8. Limiting plane. Detailed Implementation

[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.

[0019] In the embodiments of this application, please refer to Figure 1-5 As shown, this impact gear structure mainly includes: a static impact gear 1 and a moving impact gear 2. The static impact gear 1 and the moving impact gear 2 have convex tooth portions 3 formed on opposite sides. The two convex tooth portions 3 can periodically mesh with the moving impact gear 2 as it rotates. The convex tooth portion 3 includes a plurality of evenly distributed teeth in annular rings. Each tooth includes a contact slope 4 and a tooth tip 5 located at the edge of the contact slope 4. The endpoints of the tooth tip 5 are kept on the same horizontal plane. The static impact gear 1 and the moving impact gear 2 are in surface-to-surface contact, that is, the entire end face of one tooth tip 5 contacts the contact slope 4 and tooth tip 5 of the other convex tooth portion 3. Similarly, one contact slope 4 is in surface-to-surface contact with another contact slope 4.

[0020] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.

[0021] To facilitate the installation of the impact gears, mounting holes 6 are provided at the center of both the static impact gear 1 and the dynamic impact gear 2, and the protruding teeth 3 are distributed around the mounting holes 6.

[0022] like Figure 2 As shown, a step 7 is also formed on one side of the tooth tip 5. The slope of the step 7 is 70-80 degrees, and the slope of the contact slope 4 is 30-45 degrees. The step 7 and the contact slope 4 are distributed on both sides of the tooth tip 5.

[0023] like Figure 3 As shown, to ensure that the static impact gear 1 will not rotate with the rotation of the dynamic impact gear 2 after installation, a limiting plane 8 is formed on the inner wall of the mounting hole 6 of the static impact gear 1.

[0024] The impact gear of this application is formed by mold casting, which can ensure that the tooth tip 5 is on the same horizontal reference plane.

[0025] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. An impact gear structure, comprising a static impact gear and a dynamic impact gear, characterized in that, The static impact gear and the dynamic impact gear have convex teeth on opposite sides. The two convex teeth can mesh periodically as the dynamic impact gear rotates. The convex teeth include a number of evenly distributed teeth in an annular shape. Each tooth includes a contact slope and a tooth tip located at the edge of the contact slope. The ends of the tooth tips are kept on the same horizontal plane. The static impact gear and the dynamic impact gear are in surface-to-surface contact, that is, the entire end face of the tip of one tooth contacts the contact slope and the tip of the other tooth. Similarly, one contact slope is in surface-to-surface contact with another contact slope.

2. The impact gear structure according to claim 1, characterized in that, Both the static impact gear and the dynamic impact gear have mounting holes at their centers, and the protruding teeth are distributed around the mounting holes.

3. The impact gear structure according to claim 1, characterized in that, A step is also formed on one side of the tooth tip, the slope of the step is 70-80 degrees, and the slope of the contact slope is 30-45 degrees.

4. The impact gear structure according to claim 1, characterized in that, A limiting plane is formed on the inner wall of the mounting hole of the static impact gear.

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