Powder metallurgy gear

Abstract

The utility model discloses a powder metallurgy gear, and relates to the technical field of gears. A powder metallurgy gear comprises a gear body, an inner ring and a supporting face, a plurality of limiting grooves are evenly formed in the gear body, a plurality of positioning holes are circularly formed in the front face of the gear body, and a plurality of mounting grooves are circularly formed in the periphery of the inner ring. Springs are fixedly mounted on the faces, close to the inner ring, of the multiple mounting grooves, sliding rods are fixedly mounted on the faces, close to the four corners, of the multiple mounting grooves, sliding plates are fixedly mounted at the ends, away from the mounting grooves, of the multiple springs, and protruding blocks are fixedly mounted at the ends, away from the springs, of the multiple sliding plates; a shaft hole is formed in the center of the interior of the inner ring, a plurality of clamping grooves are circularly distributed in the shaft hole, a plurality of penetrating grooves are circularly formed in the outer ring of the inner ring, and a plurality of bolts are circularly distributed on the front face of the supporting face.

Description

Technical Field

[0001] The utility model relates to the technical field of gears, in particular to a powder metallurgy gear. Background Art

[0002] A gear is a mechanical transmission element, typically made of metal, with toothed edges that mesh with one or more other gears to transmit rotational motion and power. Gears are widely used in various mechanical devices and systems, such as automobiles, bicycles, watches, and industrial machinery.

[0003] Chinese utility model patent CN212155698U discloses a noise-reducing gear comprising a gear body, an outer tooth layer, a filling layer, an inner tooth layer, and a gear body filler. The gear body comprises helical cylindrical teeth, and the gear teeth are composed of an outer tooth layer, a filling layer, and an inner tooth layer. The inner tooth layer is positioned within the outer tooth layer, and the inner tooth layer and the outer tooth layer are provided with a filling layer. The gear body is provided with slots filled with a gear body filler, and the outer tooth layer is made of metal. This utility model reduces the noise generated by tooth meshing friction by forming the gear teeth with an outer tooth layer, a filling layer, and an inner tooth layer. The gear body filler reduces the noise generated by gear vibration. This application reduces the noise generated by gear transmission.

[0004] However, when the torque of the existing rotating shaft is too large, the gear teeth cannot withstand the huge stress and break; long-term exposure to excessive torque will cause rapid wear of the tooth surface, affecting the accuracy and efficiency of the transmission; in some cases, the gear material may undergo plastic deformation due to excessive stress, resulting in changes in tooth shape; due to gear damage, the transmission system may not work properly, causing equipment shutdown or unstable operation; transmission efficiency is reduced and energy consumption increases, so a powder metallurgy gear is needed. Utility Model Content

[0005] The utility model provides a powder metallurgy gear to solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a powder metallurgy gear, comprising a gear body, an inner ring and a support surface, the interior of the gear body is evenly provided with a plurality of limit grooves, the front side of the gear body is circular and provided with a plurality of positioning holes, the periphery of the inner ring is circular and provided with a plurality of mounting grooves, a plurality of mounting grooves are fixedly installed with springs on one side close to the inner ring, a plurality of mounting grooves are fixedly installed with slide bars near the four corners on one side close to the inner ring, a plurality of springs are fixedly installed with slide plates on one end away from the mounting groove, a plurality of slide plates are fixedly installed with a protrusion on one end away from the spring, an axial hole is provided at the inner center of the inner ring, a plurality of card slots are distributed in a circular shape inside the axial hole, a plurality of through grooves are distributed in a circular shape on the outer ring of the inner ring, and a plurality of bolts are distributed in a circular shape on the front side of the support surface.

[0007] Furthermore, the plurality of through slots are respectively connected to the plurality of mounting slots.

[0008] Furthermore, one end of the plurality of slides is movably connected to the outer surfaces of the plurality of slide bars inside the plurality of mounting grooves near the four corners, and one end of the outer surfaces of the plurality of slide bars is fixedly mounted with a rubber block.

[0009] Furthermore, one end of the plurality of sliding rods close to the rubber block is fixedly connected to one end of the inner wall of the plurality of mounting grooves away from the inner ring.

[0010] Furthermore, the ends of the multiple protrusions away from the skateboard respectively pass through the multiple installation grooves, pass through and extend out of the outside of the inner ring, and the ends of the multiple protrusions away from the skateboard respectively movably engage with the inner parts of the multiple limiting grooves.

[0011] Furthermore, threads are provided inside the plurality of positioning holes, and rear ends of the plurality of bolts are respectively connected to the internal threads of the plurality of positioning holes.

[0012] Furthermore, the outer surface of the inner ring is movably sleeved with the inner center of the gear body.

[0013] Compared with the prior art, the present invention provides a powder metallurgy gear with the following beneficial effects:

[0014] 1. This powder metallurgy gear implements an overload protection function for the gear body by arranging a slide bar, spring, slide plate, bump, and limit groove. This ensures that the gear body can automatically disengage when encountering abnormal loads to prevent damage, and can quickly return to normal working condition after troubleshooting and maintenance. This arrangement improves the reliability of the gear body and the convenience of maintenance, while also reducing downtime and maintenance costs caused by overload. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a diagram showing the internal structure of the gear body and inner ring of the present invention;

[0017] Figure 3 It is an enlarged view of point A of the present utility model.

[0018] In the figure: 1. Gear body; 2. Slide plate; 3. Support surface; 4. Bolt; 5. Spring; 6. Inner ring; 7. Positioning hole; 8. Slide rod; 9. Rubber block; 10. Bump; 11. Limiting groove; 12. Through groove; 13. Mounting groove; 14. Clamping slot; 15. Shaft hole. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] See also Figure 1-3 The utility model discloses a powder metallurgy gear, including a gear body 1, an inner ring 6 and a support surface 3. A plurality of limiting grooves 11 are evenly opened inside the gear body 1, a plurality of positioning holes 7 are opened on the front of the gear body 1 in a circular shape, a plurality of mounting grooves 13 are opened on the periphery of the inner ring 6 in a circular shape, a spring 5 is fixedly installed on a side of the plurality of mounting grooves 13 close to the inner ring 6, a slide bar 8 is fixedly installed near the four corners of a side of the plurality of mounting grooves 13 close to the inner ring 6, a slide plate 2 is fixedly installed on the end of the plurality of springs 5 away from the mounting groove 13, and a protrusion 10 is fixedly installed on the end of the plurality of slide plates 2 away from the spring 5, an axial hole 15 is opened at the inner center of the inner ring 6, a plurality of card slots 14 are distributed in a circular shape inside the axial hole 15, a plurality of through grooves 12 are opened on the outer ring of the inner ring 6 in a circular shape, and a plurality of bolts 4 are distributed in a circular shape on the front of the support surface 3.

[0021] Specifically, the plurality of through slots 12 are respectively communicated with the plurality of mounting slots 13 .

[0022] Specifically, one end of the plurality of slide plates 2 is movably connected to the outer surfaces of the plurality of slide bars 8 inside the plurality of mounting grooves 13 near the four corners, and one end of the outer surface of the plurality of slide bars 8 is fixedly mounted with a rubber block 9.

[0023] Specifically, one end of the plurality of slide bars 8 close to the rubber block 9 is fixedly connected to one end of the inner wall of the plurality of mounting grooves 13 away from the inner ring 6 .

[0024] Specifically, the ends of the multiple protrusions 10 away from the skateboard 2 respectively penetrate the multiple installation grooves 13, penetrate and extend out of the outside of the inner ring 6, and the ends of the multiple protrusions 10 away from the skateboard 2 are movably connected to the inside of the multiple limit grooves 11.

[0025] Specifically, threads are provided inside the plurality of positioning holes 7 , and rear ends of the plurality of bolts 4 are respectively connected to the internal threads of the plurality of positioning holes 7 .

[0026] Specifically, the outer surface of the inner ring 6 is movably sleeved with the inner center of the gear body 1 .

[0027] When in use, the gear body 1 is driven to rotate. If the torque is too large, the protrusion 10 will retract from the limit groove 11, driving the slide plate 2 along the slide rod 8, thereby compressing the spring 5. As the spring 5 is compressed, a part of the limit groove 11 is also retracted into the mounting groove 13, thereby causing the inner ring 6 to disengage from the gear body 1, so that the gear body 1 no longer rotates, thereby avoiding damage caused by overload and extending the service life of the gear. After the inner ring 6 is disengaged from the gear body 1 and the inner ring 6 is removed from the inside of the gear body 1, the pressure disappears, and the elastic force of the spring 5 pushes the slide plate 2 along the slide rod 8 to return to its original position, thereby causing the protrusion 10 to return to its original position, making it convenient for next use. This process ensures that the gear body 1 can be easily troubleshooted and maintained after the overload protection is triggered, and after the maintenance is completed, the gear body 1 can be quickly restored to normal working condition without the need for complicated reassembly process. This arrangement improves the reliability and maintenance convenience of the gear body 1.

[0028] To sum up, the powder metallurgy gear realizes the overload protection function of the gear body 1 by setting the slide rod 8, spring 5, slide plate 2, protrusion 10 and limit groove 11, ensuring that the gear body 1 can automatically disengage when encountering abnormal load to prevent damage, and can quickly return to normal working state after troubleshooting and maintenance; this setting improves the reliability of the gear body 1 and the convenience of maintenance, while also reducing the downtime and maintenance costs caused by overload.

[0029] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A powder metallurgy gear, comprising a gear body (1), an inner ring (6) and a support surface (3), characterized in that: The gear body (1) is evenly provided with a plurality of limiting grooves (11), the front face of the gear body (1) is circularly provided with a plurality of positioning holes (7), the periphery of the inner ring (6) is circularly provided with a plurality of mounting grooves (13), a spring (5) is fixedly installed on a side of the plurality of mounting grooves (13) close to the inner ring (6), a slide bar (8) is fixedly installed on a side of the plurality of mounting grooves (13) close to the inner ring (6) near four corners, a slide plate (2) is fixedly installed on one end of the plurality of springs (5) away from the mounting groove (13), a protrusion (10) is fixedly installed on one end of the plurality of slide plates (2) away from the spring (5), an axial hole (15) is provided at the inner center of the inner ring (6), a plurality of slots (14) are distributed in a circular shape inside the axial hole (15), a plurality of through slots (12) are distributed in a circular shape on the outer ring of the inner ring (6), and a plurality of bolts (4) are distributed in a circular shape on the front face of the support surface (3).

2. The powder metallurgy gear according to claim 1, characterized in that: The plurality of through slots (12) are respectively connected to the plurality of mounting slots (13).

3. The powder metallurgy gear according to claim 1, characterized in that: One end of the plurality of slide plates (2) is movably connected to the outer surfaces of the plurality of slide bars (8) inside the plurality of mounting grooves (13) near the four corners, and one end of the outer surfaces of the plurality of slide bars (8) is fixedly mounted with a rubber block (9).

4. The powder metallurgy gear according to claim 1, characterized in that: One end of the plurality of slide bars (8) close to the rubber block (9) is fixedly connected to one end of the inner wall of the plurality of mounting grooves (13) away from the inner ring (6).

5. The powder metallurgy gear according to claim 1, characterized in that: The ends of the plurality of protrusions (10) away from the slide plate (2) respectively penetrate the plurality of mounting grooves (13), penetrate and extend out of the outside of the inner ring (6), and the ends of the plurality of protrusions (10) away from the slide plate (2) respectively movably engage with the inside of the plurality of limiting grooves (11).

6. The powder metallurgy gear according to claim 1, characterized in that: The interiors of the plurality of positioning holes (7) are all provided with threads, and the rear ends of the plurality of bolts (4) are respectively connected to the internal threads of the plurality of positioning holes (7).

7. The powder metallurgy gear according to claim 1, characterized in that: The outer surface of the inner ring (6) is movably sleeved with the inner center of the gear body (1).

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