Anti-wear structure for gears

Abstract

This utility model relates to the field of gear technology, specifically disclosing an anti-wear structure for gears, including: a gear base, which is the core load-bearing component of the gear and provides a mounting base for other parts; the gear base and the tooth block constitute a basic gear structure; the gear base is provided with a mounting groove in the circumferential direction that matches the tooth block. This anti-wear structure for gears, through the three-section sliding connection structure of buffer post one and buffer post two and the characteristics of the elastic rubber composite column, can absorb the periodic load impact during gear meshing, reducing the rigid collision between the tooth block and the meshing parts. Simultaneously, the positioning pin one and positioning pin two, in conjunction with the dovetail groove mounting groove of the gear base, can limit the circumferential and radial displacement of the tooth block, avoiding local stress concentration caused by off-center loading. The two components work together to reduce the instantaneous impact force of tooth surface contact, reduce the risk of oil film damage, and suppress the generation of dry friction or boundary friction, thereby reducing tooth surface wear defects.

Description

Technical Field

[0001] This utility model relates to the field of gear technology, specifically to an anti-wear structure for gears. Background Technology

[0002] In various mechanical transmission equipment, gears are core transmission components, and their operational stability and service life directly affect the overall performance of the equipment. Gear wear-resistant structures are mostly achieved through material optimization and surface treatment. For example, high-strength alloy steel is used to forge gear blanks, and then carburizing, quenching and other processes are used to improve the hardness of the tooth surface. Some gears are also sprayed with wear-resistant coatings or nitrided to enhance the surface scratch resistance. At the same time, the gear tooth profile is optimized by meshing contact area to reduce the force per unit area and indirectly reduce the wear rate. These technologies have been widely used in equipment such as automotive gearboxes and industrial reducers.

[0003] However, during long-term use, the oil film between the tooth surfaces is easily damaged, causing dry friction or boundary friction, which leads to wear defects on the tooth surfaces. Furthermore, when the operating temperature of the equipment fluctuates greatly, the thermal expansion and contraction of the gear material will change the tooth backlash, further aggravating meshing wear and affecting the transmission accuracy and service life of the gear. Utility Model Content

[0004] The purpose of this utility model is to provide an anti-wear structure for gears to solve the problems mentioned in the background art, such as the oil film between the tooth surfaces being easily destroyed during long-term use, causing dry friction or boundary friction, resulting in wear defects on the tooth surfaces, and when the operating temperature of the equipment fluctuates greatly, the thermal expansion and contraction of the gear material will change the tooth backlash, further aggravating meshing wear and affecting the transmission accuracy and service life of the gear.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant structure for gears, including a gear base, which is the core load-bearing component of the gear and provides a mounting base for other parts; the gear base and the tooth blocks constitute the basic gear structure.

[0006] The gear base is provided with a mounting groove in the circumferential direction that is adapted to the gear block, and the upper end face and lower end face of the gear base are provided with mounting grooves adapted to the shape memory alloy spring one and shape memory alloy spring two. The shape memory alloy spring one is connected to the limiting end cover one, and the limiting end cover one is positioned and connected to the gear block through the positioning pin one.

[0007] The memory alloy spring 2 is connected to the limiting end cap 2, and the limiting end cap 2 is positioned and connected to the tooth block through the positioning pin 2. Each tooth block has one positioning pin 1 and one positioning pin 2. The buffer post 1 and buffer post 2 are arranged circumferentially on the end face of the limiting end cap 1 and are arranged perpendicularly to each other in the same direction. The buffer post 2 is arranged circumferentially on the end face of the limiting end cap 2. The buffer post 1 and buffer post 2 form a three-section sliding rubber column through the internal sliding slide rod.

[0008] By adopting the above technical solution, the positioning and buffering of the tooth block are achieved, reducing meshing impact and off-center load. At the same time, with the synergistic effect of the shape memory alloy spring and the buffer column, the influence of temperature changes on the tooth backlash is addressed, tooth surface wear is reduced, and transmission stability is improved.

[0009] Preferably, the mounting groove of the gear base adopts a dovetail groove structure, and the shape of the dovetail groove is adapted to the shape of the tooth block connection.

[0010] By adopting the above technical solution, the stability of the tooth block installation is enhanced, the tooth block is effectively prevented from shifting during transmission, tooth surface wear caused by off-center loading is further avoided, and the structural reliability is improved.

[0011] Preferably, the shape memory alloy spring is mounted between the gear base and the limiting end cap, and the limiting end cap is penetrated by the hub of the gear base.

[0012] By adopting the above technical solution, the spring can stably transmit deformation force, ensure effective pushing of the buffer column, ensure the reliable realization of temperature adaptive adjustment function, and maintain reasonable tooth flank clearance.

[0013] Preferably, the shape memory alloy spring one and shape memory alloy spring two are made of nickel-titanium shape memory alloy material to form the spring structure.

[0014] By adopting the above technical solution, deformation can be accurately responded to temperature changes, ensuring the sensitivity and stability of temperature adaptive adjustment, effectively compensating for changes in tooth flank clearance, and reducing wear.

[0015] Preferably, the first and second buffer columns are composite columns of elastic rubber columns, with a wear-resistant coating sprayed on their surfaces.

[0016] The above technical solution uses an elastic rubber composite column with a wear-resistant coating on the surface, which not only enhances the buffering and energy absorption effect, but also improves its wear resistance and extends its service life.

[0017] Preferably, the memory alloy spring is mounted between the gear base and the limiting end cap, and the limiting end cap is penetrated by the hub of the gear base.

[0018] By adopting the above technical solution, the stable transmission of spring deformation force is guaranteed, the reliable operation of the temperature adaptive adjustment function on the other side is ensured, and the overall transmission accuracy is maintained.

[0019] Preferably, the second positioning pin and the first positioning pin are inserted into the two sides of the tooth block, respectively.

[0020] By adopting the above technical solution, the positioning pins are inserted from both sides of the tooth block to further enhance the positioning effect of the tooth block, prevent the tooth block from circumferential and radial displacement during transmission, avoid off-center load, reduce tooth surface wear, and ensure the stability and accuracy of transmission.

[0021] Compared with the prior art, the beneficial effects of this utility model are: the gear uses a wear-resistant structure:

[0022] 1. Through the three-section sliding connection structure of buffer column one and buffer column two and the characteristics of elastic rubber composite column, the periodic load impact during gear meshing can be absorbed, reducing the rigid collision between the tooth block and the meshing part. At the same time, the positioning pin one and positioning pin two, together with the dovetail groove mounting groove of the gear base, can limit the circumferential and radial displacement of the tooth block, avoid local stress concentration caused by off-center load. The two work together to reduce the instantaneous impact force of tooth surface contact, reduce the risk of oil film damage, suppress the generation of dry friction or boundary friction, thereby reducing tooth surface wear defects.

[0023] 2. When the temperature rises, shape memory alloy spring 1 and shape memory alloy spring 2 extend towards limit end cap 1 and limit end cap 2 respectively, pushing buffer column 1 and buffer column 2 to slide axially, increasing their depth of occupation in the tooth mouth area, compensating for the tooth backlash caused by the thermal expansion and contraction of the gear. When the temperature drops, they contract and reset, driving the buffer column back to its initial position, maintaining a reasonable tooth backlash. This adjustment mechanism avoids the influence of temperature fluctuations on tooth backlash, reduces meshing wear caused by abnormal clearance, and ensures transmission accuracy.

[0024] 3. Limiting end cap one and limiting end cap two are stably connected to the tooth block through positioning pins, which enhances the overall structural rigidity. The wear-resistant coating on the surface of the buffer column extends its service life. Its cooperation with the memory alloy spring achieves dual anti-wear protection of buffering and vibration reduction and temperature self-adaptation, effectively reducing the wear rate of the tooth surface and improving the long-term stability and life of the gear. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall external three-dimensional structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the overall disassembled three-dimensional structure of this utility model;

[0027] Figure 3 This is a three-dimensional top-section diagram of the overall internal structure of this utility model;

[0028] Figure 4 This is a schematic diagram of the overall internal side section of the present invention.

[0029] Figure 5 This is a three-dimensional structural diagram of the gear base and gear block of this utility model.

[0030] Figure 6 This is a three-dimensional structural diagram showing the installation positions of the first and second limiting end caps of this utility model.

[0031] In the diagram: 1. Gear base; 2. Gear block; 3. Shape memory alloy spring 1; 4. Limiting end cap 1; 5. Locating pin 1; 6. Buffer post 1; 7. Buffer post 2; 8. Limiting end cap 2; 9. Shape memory alloy spring 2; 10. Locating pin 2. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figures 1-6 This utility model provides a technical solution: a wear-resistant structure for gears, including a gear base 1, a tooth block 2, a memory alloy spring 3, a limiting end cap 4, a positioning pin 5, a buffer post 6, a buffer post 7, a limiting end cap 8, a memory alloy spring 9, and a positioning pin 10.

[0034] Among them, the gear base 1 is the core load-bearing component of the gear, providing a mounting base for other parts. The gear base 1 and the gear block 2 constitute the basic gear structure.

[0035] The gear base 1 is provided with a mounting groove in the circumference that is adapted to the tooth block 2. The upper and lower end faces of the gear base 1 are provided with mounting grooves that are adapted to the shape memory alloy spring 1 3 and shape memory alloy spring 2 9. The mounting groove of the gear base 1 adopts a dovetail groove structure, and the shape of the dovetail groove is adapted to the shape of the connection of the tooth block 2. The shape memory alloy spring 1 3 is connected to the limiting end cover 4, and the limiting end cover 4 is positioned and connected to the tooth block 2 through the positioning pin 1 5. The shape memory alloy spring 1 3 is erected between the gear base 1 and the limiting end cover 4, and the limiting end cover 4 is penetrated by the hub of the gear base 1. The shape memory alloy spring 1 3 and the shape memory alloy spring 2 9 are made of nickel-titanium shape memory alloy material. The shape memory alloy spring 2 9 is erected between the gear base 1 and the limiting end cover 2 8, and the limiting end cover 2 8 is penetrated by the hub of the gear base 1.

[0036] Referring to the attached diagrams in the instruction manual Figures 1-6 As shown, the tooth block 2 is aligned with the dovetail groove mounting slot on the circumferential direction of the gear base 1 and pushed in axially to complete the initial positioning, ensuring that the tooth block 2 fits tightly with the mounting slot to form a basic transmission structure. In the corresponding mounting slots on the upper and lower end faces of the gear base 1, memory alloy spring 1 3 and memory alloy spring 2 9 are respectively installed. One end of the spring is connected and fixed to the gear base 1, and the other end is reserved for connection interface with the limit end cover.

[0037] Align the first limiting end cap 4 and the second limiting end cap 8 with the upper and lower ends of the gear base 1, respectively, and connect and fix the other ends of the memory alloy springs 3 and 9 to the limiting end caps, ensuring that the limiting end caps are penetrated by the hub of the gear base 1. Then, insert the first positioning pin 5 and the second positioning pin 10 from the two sides of the tooth block 2, pass through the tooth block 2, and connect with the first limiting end cap 4 and the second limiting end cap 8 to complete the positioning. The first buffer post 6 is installed in the circumferential position of the end face of the first limiting end cap 4, and the second buffer post 7 is installed in the circumferential position of the end face of the second limiting end cap 8, so that the two are connected in a three-section sliding connection through the internal slide rod, and are in a state of being perpendicularly set in the coaxial direction. Figure 6 As shown;

[0038] The memory alloy spring 29 is connected to the limiting end cap 28, and the limiting end cap 28 is positioned and connected to the tooth block 2 through the positioning pin 210. Each tooth block 2 has one positioning pin 15 and one positioning pin 210. The buffer column 16 and buffer column 27 are arranged circumferentially on the end face of the limiting end cap 14 and are arranged perpendicularly to each other in the same direction. The buffer column 27 is arranged circumferentially on the end face of the limiting end cap 28. The buffer column 16 and buffer column 27 form a three-section sliding rubber column through the internal sliding rod. The buffer column 16 and buffer column 27 are composite columns of elastic rubber columns, and are coated with a wear-resistant coating. The positioning pin 210 and positioning pin 15 are inserted into the two sides of the tooth block 2 respectively.

[0039] Referring to the attached diagrams in the instruction manual Figures 1-6 As shown, after the gear starts, the gear base 1 drives the tooth block 2 to rotate, and the tooth block 2 participates in the meshing transmission. At this time, the buffer column 6 and the buffer column 7 are not significantly compressed, the memory alloy spring 3 and the memory alloy spring 9 are in the initial contraction state, and the positioning pin 5, the positioning pin 10 and the limiting end cap 4 and the limiting end cap 8 maintain the initial position of each component.

[0040] During transmission, the tooth block 2 is subjected to periodic load impacts. When rotating forward, one side of the buffer column 6 and the second buffer column 7 are squeezed. The three-section sliding structure slides through the slide rod, and the rubber elastic deformation absorbs the impact. When rotating in reverse, the other side of the buffer column 6 and the second buffer column 7 are squeezed. This process is repeated. The positioning pin 5 and the positioning pin 10 restrict the circumferential and radial displacement of the tooth block 2, and cooperate with the dovetail groove of the gear base 1 to install the anti-eccentric load.

[0041] When the temperature is too high, the shape memory alloy spring 13 and shape memory alloy spring 29 are heated and elongated towards the limiting end cap 14 and limiting end cap 28, pushing the buffer column 16 and buffer column 27 to slide axially, increasing the depth of occupation in the tooth area and filling the meshing gap caused by thermal expansion.

[0042] When the temperature decreases, shape memory alloy springs 1-3 and 2-9 contract, causing limit end caps 1-4 and 2-8 to return to their original positions. Buffer pillars 1-6 and 2-7 also reset, restoring the tooth depth. Positioning pins 1-5 and 2-10 ensure positional accuracy, and the cycle begins again.

[0043] Working principle: When using this anti-wear structure for gears, the gear base 1 is fitted and assembled with the gear block 2 through the circumferential dovetail groove mounting slot. The memory alloy spring 1 3 and memory alloy spring 2 9 are respectively mounted at the connection between the gear base 1 and the limiting end cover 1 4 and the limiting end cover 2 8. The limiting end cover is positioned with the gear block 2 by the positioning pin 1 5 and the positioning pin 2 10. The buffer column 1 6 and the buffer column 2 7 are distributed axially along the end face of the limiting end cover in a three-section sliding structure. The gear is in the ready-to-drive state.

[0044] During gear transmission, the tooth block 2 is subjected to periodic load impact. Buffer column 1 6 and buffer column 2 7 are elastic rubber composite columns that absorb and disperse energy by utilizing rubber deformation. When rotating forward, one side of the buffer column is squeezed to buffer the rigid impact of meshing. When rotating in reverse, the other side of the buffer column repeats this process. At the same time, the positioning pin restricts the circumferential and radial displacement of the tooth block 2, and the dovetail groove prevents off-center loading and reduces the risk of tooth surface wear.

[0045] When the equipment operates at excessively high temperatures, reaching the phase transformation temperature of the memory alloy, the nickel-titanium memory alloy springs 3 and 9 deform under heat, elongating towards the limiting end caps 4 and 8 respectively. These extensions, via the limiting end caps, push the buffer pillars 6 and 7 to slide axially, increasing their depth in the tooth region. This fills the meshing gap caused by thermal expansion, suppressing high-frequency impacts and abnormal friction on the tooth surface. After the temperature decreases, the memory alloy springs return to their initial shape and contract, causing the limiting end caps to return to their original positions. The buffer pillars then return to their original positions, restoring the tooth depth to normal, ensuring gear transmission accuracy and stable meshing. This allows for continuous adaptation to different temperature conditions and wear resistance requirements, before entering the next transmission cycle, increasing overall practicality.

[0046] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wear-resistant structure for gears, comprising: The gear base (1) is the core load-bearing component of the gear, providing a mounting base for other parts. The gear base (1) and the gear block (2) constitute the basic gear structure. The gear base (1) is provided with a mounting groove in the circumferential direction that is adapted to the gear block (2), and the upper end face and lower end face of the gear base (1) are provided with mounting grooves adapted to the memory alloy spring one (3) and the memory alloy spring two (9). The memory alloy spring one (3) is connected to the limiting end cover one (4), and the limiting end cover one (4) is positioned and connected to the gear block (2) through the positioning pin one (5). The memory alloy spring 2 (9) is connected to the limiting end cap 2 (8), and the limiting end cap 2 (8) is positioned and connected to the tooth block (2) through the positioning pin 2 (10). Each tooth block (2) has one positioning pin 1 (5) and one positioning pin 2 (10). The buffer column 1 (6) and buffer column 2 (7) are arranged circumferentially on the end face of the limiting end cap 1 (4) and are arranged perpendicularly to each other in the same direction. The buffer column 2 (7) is arranged circumferentially on the end face of the limiting end cap 2 (8). The buffer column 1 (6) and buffer column 2 (7) are connected to a rubber column in a three-section sliding connection through an internal sliding rod.

2. A wear resistant structure for a gear as claimed in claim 1, wherein: The mounting groove of the gear base (1) adopts a dovetail groove structure, and the shape of the dovetail groove is adapted to the shape of the connection of the gear block (2).

3. A wear resistant structure for a gear as claimed in claim 1, wherein: The memory alloy spring (3) is mounted between the gear base (1) and the limiting end cover (4), and the limiting end cover (4) is penetrated by the hub of the gear base (1).

4. A wear resistant structure for a gear as claimed in claim 1, wherein: The shape memory alloy spring one (3) and shape memory alloy spring two (9) are made of nickel-titanium shape memory alloy material.

5. A wear resistant structure for a gear as claimed in claim 1, wherein: The first buffer column (6) and the second buffer column (7) are composite columns of elastic rubber columns, and are coated with a wear-resistant coating on their surfaces.

6. A wear resistant structure for a gear as claimed in claim 1, wherein: The memory alloy spring 2 (9) is mounted between the gear base (1) and the limiting end cover 2 (8), and the limiting end cover 2 (8) is penetrated by the hub of the gear base (1).

7. A wear resistant structure for a gear as claimed in claim 1, wherein: The second positioning pin (10) and the first positioning pin (5) are inserted into the two sides of the tooth block (2), respectively.

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