Powder metallurgy gear
By setting an equal number of toothed protrusions and annular surfaces, annular bosses and grooves in the powder metallurgy bevel gear, as well as positioning shaft holes and extensions, the problem of insufficient structural strength of the traditional powder metallurgy bevel gear is solved, and the structure of the traditional powder metallurgy bevel gear is improved Strength and stability reduce production costs and extend service life.
Patent Information
- Application Number
- CN202421220192.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The structural strength of traditional powder metallurgical bevel gears is not high enough and the product pass rate is low, which leads to an increase in production costs and limits large-scale promotion.
By providing an equal number of first toothed protrusions and second toothed protrusions on the gear body, and an annular surface is provided at the outer end of the second toothed protrusion, the thickness and structural strength are increased; an annular shape is provided on the gear body. The boss and groove are used to allocate pressure and strengthen the structure; the first toothed protrusion is distributed in an annular shape, forming a limiting surface and groove, increasing stability and service life; the positioning shaft hole and extension are used for installation and Compensation strength.
It significantly improves the overall structural strength and stability of the gear, reduces the use of raw materials, reduces production costs, and extends the service life, avoiding irreversible damage caused by uneven stress.
Smart Images
Figure CN222363382U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear structures, in particular to a powder metallurgy gear. Background Art
[0002] In various machinery used in industry and agriculture, gears are indispensable parts in the transmission structure, especially bevel gears used to transmit power between two intersecting shafts. They are widely used in various machines and equipment. The material utilization rate of traditional milling and planing processes for manufacturing gears is low, which will also cause certain processing damage to the surface of the bevel gears, significantly increasing the processing cost of the bevel gears.
[0003] Therefore, the powder metallurgy processing technology has emerged in the industry. By adding metal powder into the mold for smelting and forming before processing, the utilization rate of raw materials has been greatly improved and the production cost of bevel gears has been reduced. However, the structural strength of bevel gears processed by traditional powder metallurgy technology is not high enough, and the product qualification rate is low, which is not conducive to large-scale production. Utility Model Content
[0004] In order to solve the above problems, the utility model proposes a powder metallurgy gear, which solves the problem that the traditional bevel gear has insufficient structural strength.
[0005] The technical solution adopted by the utility model is: a powder metallurgy gear, including a gear body, the gear body including a conical tooth surface and an imitation tooth surface, the conical tooth surface is located on one side of the gear body, and the imitation tooth surface is located on the other side of the gear body, the conical tooth surface is composed of a plurality of first tooth-like protrusions, the imitation tooth surface is composed of a plurality of second tooth-like protrusions, the outer end of the second tooth-like protrusion is provided with an annular surface, and the number of the first tooth-like protrusions and the second tooth-like protrusions is equal.
[0006] Through the above technical solution, an equal number of first tooth-like protrusions and second tooth-like protrusions are respectively arranged at both ends of the gear body, thereby greatly increasing the thickness between the conical tooth surface and the imitation tooth surface, so that the overall structural strength of the first tooth-like protrusion and the second tooth-like protrusion is greatly improved, and an annular surface is arranged at the outer end of the second tooth-like protrusion, so that the second tooth-like protrusion can share the pressure through the annular surface when the force is applied, thereby further improving the structural strength of the gear body, and the arrangement of the first tooth-like protrusion and the second tooth-like protrusion reduces the use of raw materials while improving the structural stability of the gear body, thereby greatly reducing the production cost of the factory.
[0007] Furthermore, an annular boss is provided on the gear body, the annular boss and the tooth-like surface are located on the same side of the gear body, and the inner end of the second tooth-like protrusion is connected to the annular boss.
[0008] Through the above technical solution, the inner end of the second tooth-shaped protrusion is connected to the annular boss so that when the second tooth-shaped protrusion is subjected to force, the annular boss can bear part of the pressure, thereby increasing the structural strength of the second tooth-shaped protrusion.
[0009] Furthermore, the first tooth-like protrusion is distributed in a ring shape on the gear body, and the inner end of the first tooth-like protrusion and the gear body form a limited position surface, and a groove is arranged on the limited position surface. The groove and the conical tooth-shaped surface are located on the same side of the gear body, and a reinforcement block is arranged on the annular boss corresponding to the groove.
[0010] Through the above technical solution, the setting of the groove enables the gear body to be stopped urgently during use, ensuring the stability of the overall structure of the gear body; the reinforcing block corresponding to the groove arranged on the annular boss strengthens the structure of the groove part, thereby significantly extending the service life of the gear body.
[0011] Furthermore, the limiting surface is provided with at least two grooves, and the grooves are evenly distributed in the circumferential direction.
[0012] Through the above technical solution, the evenly distributed grooves make the overall force on the gear body more balanced during the emergency stop process, avoiding irreversible damage to the gear body due to uneven force.
[0013] Furthermore, a positioning shaft hole is provided on the gear body, the positioning shaft hole is connected to the limiting surface, an extension portion is provided on the annular boss, the reinforcement blocks are evenly distributed in the circumferential direction of the extension portion, and the positioning shaft hole passes through the extension portion.
[0014] Through the above technical solution, the positioning shaft hole can be used to connect an external power source according to actual usage conditions, which facilitates the installation and use of the gear body; the gear body can compensate for strength through the extension part to improve the overall strength and stability of the gear body.
[0015] Furthermore, the first tooth-shaped protrusion and the second tooth-shaped protrusion are both oblique teeth, the first tooth-shaped protrusion becomes higher continuously from the outside to the inside, and the second tooth-shaped protrusion becomes lower continuously from the outside to the inside.
[0016] Through the above technical solution, the first tooth-like protrusion and the second tooth-like protrusion are both helical teeth, so that during the powder metallurgy process of the gear body, the powder density of the conical tooth surface and the simulated tooth surface is guaranteed, and the working strength and hardness of the conical tooth surface and the simulated tooth surface are also guaranteed.
[0017] Furthermore, the gear body is pressed by a powder metallurgy process.
[0018] The above technical solution makes the production of the gear body more convenient and greatly reduces the consumption of raw materials. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0020] Figure 1 This is one of the overall structural diagrams of the utility model;
[0021] Figure 2 This is the second schematic diagram of the overall structure of the utility model;
[0022] Figure 3 It is a cross-sectional view of the utility model;
[0023] Figure 4 This is the third schematic diagram of the overall structure of the utility model;
[0024] Figure 5 This is the fourth schematic diagram of the overall structure of the utility model;
[0025] The utility model number information is as follows:
[0026] 1. Gear body; 2. Conical tooth surface; 3. Imitation tooth surface; 4. First tooth protrusion; 5. Second tooth protrusion; 6. Annular surface; 7. Annular boss; 8. Limiting surface; 9. Groove; 10. Reinforcement block; 11. Positioning shaft hole; 12. Extension part;
[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0030] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0031] See also Figure 1 to Figure 5 As shown, a powder metallurgy gear includes a gear body 1, the gear body 1 includes a conical tooth surface 2 and an imitation tooth surface 3, the conical tooth surface 2 is located on one side of the gear body 1, and the imitation tooth surface 3 is located on the other side of the gear body 1, the conical tooth surface 2 is composed of a plurality of first tooth-like protrusions 4, and the imitation tooth surface 3 is composed of a plurality of second tooth-like protrusions 5, and the outer end of the second tooth-like protrusion 5 is provided with an annular surface 6, and the number of the first tooth-like protrusions 4 and the second tooth-like protrusions 5 is equal. An equal number of first tooth-like protrusions 4 and second tooth-like protrusions 5 are respectively arranged at both ends of the gear body 1, thereby greatly increasing the thickness between the conical tooth surface 2 and the imitation tooth surface 3, so that the overall structural strength of the first tooth-like protrusions 4 and the second tooth-like protrusions 5 is greatly improved, and an annular surface 6 is arranged at the outer end of the second tooth-like protrusion 5, so that the second tooth-like protrusion 5 can share the pressure through the annular surface 6 when subjected to force, further improving the structural strength of the gear body 1, and the arrangement of the first tooth-like protrusion 4 and the second tooth-like protrusion 5 reduces the use of raw materials while improving the structural stability of the gear body 1, thereby greatly reducing the production cost of the factory.
[0032] See also Figure 1 , 3 As shown in Figures 5 and 6, an annular boss 7 is provided on the gear body 1, the annular boss 7 and the tooth-like surface 3 are located on the same side of the gear body 1, and the inner end of the second tooth-like protrusion 5 is connected to the annular boss 7. The inner end of the second tooth-like protrusion 5 is connected to the annular boss 7 so that when the second tooth-like protrusion 5 is subjected to force, the annular boss 7 can bear part of the pressure, thereby increasing the structural strength of the second tooth-like protrusion 5.
[0033] See also Figure 4As shown, the first tooth-shaped protrusion 4 is distributed in an annular shape on the gear body 1, and the inner end of the first tooth-shaped protrusion 4 and the gear body 1 form a limited position surface 8, and a groove 9 is provided on the limited position surface 8. The groove 9 and the conical tooth-shaped surface 2 are located on the same side of the gear body 1, and a reinforcement block 10 is provided on the annular boss 7 corresponding to the groove 9. The provision of the groove 9 allows the gear body 1 to be stopped urgently during use, ensuring the stability of the overall structure of the gear body 1; the reinforcement block 10 provided on the annular boss 7 corresponding to the groove 9 strengthens the structure of the groove 9, and significantly prolongs the service life of the gear body 1.
[0034] See also Figure 3 , 4 As shown, the limiting surface 8 is provided with at least two grooves 9, and the grooves 9 are evenly distributed in the circumferential direction. The evenly distributed grooves 9 make the overall force of the gear body 1 more balanced during the emergency stop process, avoiding irreversible damage to the gear body 1 due to uneven force.
[0035] Preferably, three grooves 9 are provided on the limiting surface 8 .
[0036] See also Figure 1 , 3 As shown in , 4 and 5, a positioning shaft hole 11 is provided on the gear body 1, and the positioning shaft hole 11 is connected to the limiting surface 8. An extension part 12 is provided on the annular boss 7, and the reinforcement block 10 is evenly distributed in the circumferential direction of the extension part 12, and the positioning shaft hole 11 passes through the extension part 12. The positioning shaft hole 11 can be used to connect an external power source according to actual usage conditions, which is convenient for the installation and use of the gear body 1; the gear body 1 can compensate for strength through the extension part 12, thereby improving the overall strength and stability of the gear body 1.
[0037] See also Figure 1 to Figure 5 As shown, the first tooth-shaped protrusion 4 and the second tooth-shaped protrusion 5 are both helical teeth, the first tooth-shaped protrusion 4 continuously increases in height from the outside to the inside, and the second tooth-shaped protrusion 5 continuously decreases in height from the outside to the inside. The first tooth-shaped protrusion 4 and the second tooth-shaped protrusion 5 are both helical teeth, so that during the powder metallurgy process of the gear body 1, the powder density of the conical tooth profile surface 2 and the imitation tooth profile surface 3 is guaranteed, and the working strength and hardness of the conical tooth profile surface 2 and the imitation tooth profile surface 3 are also guaranteed.
[0038] The gear body 1 is pressed by a powder metallurgy process, which makes the production of the gear body 1 more convenient and greatly reduces the consumption of raw materials.
[0039] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. A powder metallurgy gear, comprising a gear body (1), characterized in that: The gear body (1) comprises a conical tooth surface (2) and an imitation tooth surface (3), wherein the conical tooth surface (2) is located on one side of the gear body (1), and the imitation tooth surface (3) is located on the other side of the gear body (1), the conical tooth surface (2) is composed of a plurality of first tooth-shaped protrusions (4), and the imitation tooth surface (3) is composed of a plurality of second tooth-shaped protrusions (5), and an annular surface (6) is provided at the outer end of the second tooth-shaped protrusion (5), and the number of the first tooth-shaped protrusions (4) and the second tooth-shaped protrusions (5) is equal.
2. A powder metallurgy gear according to claim 1, characterized in that: An annular boss (7) is provided on the gear body (1); the annular boss (7) and the tooth-like surface (3) are located on the same side of the gear body (1); and the inner end of the second tooth-like protrusion (5) is connected to the annular boss (7).
3. A powder metallurgy gear according to claim 2, characterized in that: The first tooth-shaped protrusions (4) are distributed in an annular shape on the gear body (1); the inner ends of the first tooth-shaped protrusions (4) and the gear body (1) form a limited position surface (8); a groove (9) is provided on the limited position surface (8); the groove (9) and the conical tooth-shaped surface (2) are located on the same side of the gear body (1); and a reinforcing block (10) is provided on the annular boss (7) corresponding to the groove (9).
4. The powder metallurgy gear according to claim 3, characterized in that: The limiting surface (8) is provided with at least two grooves (9), and the grooves (9) are evenly distributed in the circumferential direction.
5. A powder metallurgy gear according to claim 3 or 4, characterized in that: The gear body (1) is provided with a positioning shaft hole (11), the positioning shaft hole (11) is connected to the limiting surface (8), the annular boss (7) is provided with an extension portion (12), the reinforcement blocks (10) are evenly distributed in the circumferential direction of the extension portion (12), and the positioning shaft hole (11) passes through the extension portion (12).
6. The powder metallurgy gear according to claim 5, characterized in that: The first tooth-shaped protrusion (4) and the second tooth-shaped protrusion (5) are both oblique teeth; the first tooth-shaped protrusion (4) becomes higher continuously from the outside to the inside, and the second tooth-shaped protrusion (5) becomes lower continuously from the outside to the inside.
7. A powder metallurgy gear according to claim 1 or 2 or 3 or 4 or 6, characterized in that: The gear body (1) is pressed by a powder metallurgy process.