An overload prevention idler gear

Abstract

The utility model provides a kind of anti-overload intermediate gear belongs to gear technical field.It solves the problem that the existing intermediate gear load is too large tooth part is vulnerable to damage.The anti-overload intermediate gear is characterized by including gear ring and follow-up roller, gear ring inner wall is uniformly distributed with several inclined ball guide grooves, follow-up roller is equipped with several balls, ball is placed in ball guide groove, located follow-up roller is equipped with pivot hole, bearing is equipped in pivot hole, follow-up roller one end is equipped with abutment, and the other end of the follow-up roller is equipped with detachable end cover, the utility model has the advantages of anti-overload, shockproof.

Description

Technical Field

[0001] This utility model belongs to the field of gear technology and relates to an overload-resistant intermediate gear. Background Technology

[0002] An intermediate gear is a transitional gear located between the driving and driven gears in a mechanical transmission system. Its main functions are to transmit power, change direction, or adjust speed. Its number of teeth and module must match those of the adjacent gears to ensure smooth meshing. Key features include: not changing the transmission ratio (only changing the direction of rotation), sharing the load, and coordinating multi-axis transmission layouts.

[0003] The intermediate gear bears bidirectional meshing force in the transmission system. If overload occurs, it can easily lead to pitting on the tooth surface, tooth breakage, or bearing damage, thereby affecting the stability of the entire transmission chain. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an automatically retracting, overload-resistant intermediate gear.

[0005] The purpose of this utility model can be achieved through the following technical solution: an overload-proof intermediate gear, characterized in that it includes a gear ring and a follower roller, the inner wall of the gear ring is evenly distributed with a number of inclined ball guide grooves, the follower roller is provided with a number of balls, the balls are all placed in the ball guide grooves, the follower roller is provided with a shaft hole, the shaft hole is provided with a bearing, one end of the follower roller is provided with a backing part, and the other end of the follower roller is provided with a detachable end cap.

[0006] In the aforementioned overload-resistant intermediate gear, the end cover has a number of flexible pillars evenly distributed in a ring, and the ends of the flexible pillars are provided with snap-fit ​​protrusions, which are snapped into the gear ring.

[0007] In the aforementioned overload-proof intermediate gear, the follower roller is provided with a ball bearing limiting hole.

[0008] In the aforementioned type of overload protection intermediate gear, a guide chamfer is provided on one side of the gear ring.

[0009] Compared with existing technologies, this overload protection intermediate gear prevents wear on the gear tooth surface during overload by using a toothed ring that can slide axially, thereby increasing the service life of gear meshing. The flexible column absorbs the instantaneous transmission force through torsional deformation and compression, and its elastic reset can push the toothed ring to reset, thus enabling the toothed ring to achieve automatic reset. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of the overload protection intermediate gear.

[0011] Figure 2This is a schematic diagram of the structure of the overload protection intermediate gear.

[0012] Figure 3 This is a schematic diagram of the structure of the overload protection intermediate gear.

[0013] In the diagram, 1. Gear ring; 2. End cap; 3. Flexible column; 4. Shaft hole; 5. Follower roller; 6. Guide chamfer; 7. Snap-fit ​​protrusion; 8. Ball guide groove; 9. Ball; 10. Bearing; 11. Ball limiting hole; 12. Backing part. Detailed Implementation

[0014] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0015] like Figure 1 , 2 As shown in Figure 3, this overload protection intermediate gear includes a gear ring 1 and a follower roller 5. The inner wall of the gear ring 1 is evenly distributed with several inclined ball guide grooves 8. The follower roller 5 is provided with several balls 9, which are all placed in the ball guide grooves 8. The follower roller 5 is provided with a shaft hole 4, and a bearing 10 is provided in the shaft hole 4. One end of the follower roller 5 is provided with a backing part 12, and the other end of the follower roller 5 is provided with a detachable end cover 2. This intermediate gear rotates with both sides. When the instantaneous force applied by one side gear is too large, the gear ring 1 moves due to the inclined ball guide grooves 8 until it disengages from the transmission, reducing excessive wear of the tooth surface caused by failure and vibration.

[0016] Preferably, the end cap 2 has a number of flexible posts 3 evenly distributed in a ring. The end of the flexible post 3 is provided with a snap-fit ​​protrusion 7. The snap-fit ​​protrusion 7 is snapped into the gear ring 1. The flexible post 3 can absorb instantaneous force through torsional deformation, reduce the impact during instantaneous transmission, and increase the service life of the gear. At the same time, when the torsional flexible post 3 is reset, it can push the gear ring 1 to reset, so that the gear ring 1 can achieve automatic reset.

[0017] Preferably, the follower roller 5 is provided with a ball bearing limiting hole 11.

[0018] Preferably, a guide chamfer 6 is provided on one side of the gear ring 1. The guide chamfer 6 reduces tooth tip breakage and reduces the generation of fragments that affect the service life of the gear when the gear ring 1 re-engages.

[0019] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0020] Although this document frequently uses terms such as gear ring 1, end cap 2, flexible column 3, shaft hole 4, follower roller 5, guide chamfer 6, snap-fit ​​protrusion 7, ball guide groove 8, ball 9, bearing 10, ball limiting hole 11, and retaining part 12, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An overload-resistant intermediate gear, characterized in that, The device includes a gear ring (1) and a follower roller (5). The inner wall of the gear ring (1) is evenly distributed with several inclined ball guide grooves (8). The follower roller (5) is provided with several balls (9). The balls (9) are all placed in the ball guide grooves (8). The follower roller (5) is provided with a shaft hole (4). The shaft hole (4) is provided with a bearing (10). One end of the follower roller (5) is provided with a backing part (12), and the other end of the follower roller (5) is provided with a detachable end cap (2).

2. The overload-resistant intermediate gear according to claim 1, characterized in that, The end cap (2) has several flexible posts (3) evenly distributed in a ring. The end of each flexible post (3) is provided with a snap-fit ​​protrusion (7), and the snap-fit ​​protrusion (7) is snapped into the toothed ring (1).

3. The overload-resistant intermediate gear according to claim 1, characterized in that, The follower roller (5) is provided with a ball limit hole (11).

4. The overload-resistant intermediate gear according to claim 1, characterized in that, The gear ring (1) has a guide chamfer (6) on one side.

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