Spiral-toothed sprocket segment

Abstract

The utility model discloses a helical toothed sprocket piece, concretely relates to the sprocket piece technical field, including the wheel hub, the outside of wheel hub is equipped with the flange, the outside of flange is provided with a plurality of wheel teeth, and the vertical cross section shape of each wheel tooth one end all is arranged to arc, to make the wheel tooth insert into the chain. The utility model discloses a wheel tooth along the flange circumferential direction is helically distributed, and the vertical cross section shape of wheel tooth one end is arc, can make the wheel tooth when inserting the chain, and the contact line is by short to long again by long to short, and the load that wheel tooth is suffered gradually increases again gradually unloads, realizes the smooth engagement with the chain, and the impact and vibration in the transmission process are greatly reduced, and the stability of transmission is improved.

Description

Technical Field

[0001] This utility model relates to the field of sprocket technology, and more specifically, to helical tooth sprockets. Background Technology

[0002] The tooth profile of a helical sprocket is an oblique line at a certain angle to the center line, and the teeth are distributed in a spiral pattern along the circumference. This design causes the contact line to gradually lengthen and then shorten again when the sprocket meshes with the chain, resulting in a gradual increase and then gradual reduction of the load on the teeth.

[0003] In transmission, helical tooth sprockets transmit power and torque through the meshing of their teeth with the chain. Because the teeth are at a certain angle to the chain pin axis, they gradually mesh with the chain as the sprocket rotates, making the meshing process smoother and reducing impact and vibration. However, under high-intensity operation, helical tooth sprockets generate a large amount of heat due to friction, which is difficult to dissipate, leading to significant wear. They are also prone to deformation under stress due to their own high heat content. Therefore, a helical tooth sprocket with good heat dissipation and high stability is required. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a helical tooth sprocket, which aims to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a helical tooth sprocket, including a hub, a rim is sleeved on the outer side of the hub, and a plurality of teeth are provided on the outer side of the rim, and the vertical cross-sectional shape of one end of each tooth is set to be arc-shaped so that the tooth can be inserted into the chain;

[0006] A central reinforcing sleeve is provided in the middle of the hub, and several heat dissipation vents are provided through the surface of the hub;

[0007] Optionally, in a possible implementation, the outer side of the central reinforcing sleeve extends to one side of the surface of the heat dissipation vent, and the outer side of the central reinforcing sleeve is located on one side of the center line of the heat dissipation vent. The multiple heat dissipation vents are distributed circumferentially along the axis of the hub, and a mounting hole is provided between each pair of adjacent heat dissipation vents. The mounting hole is opened through the surface of the hub. A connecting rib is fixedly provided between the wheel rim and the wheel teeth. The connecting rib, wheel rim, and wheel teeth are integrally formed.

[0008] The technical effects and advantages of this utility model are as follows:

[0009] With the teeth spirally distributed along the circumference of the rim and the vertical cross-section of one end of the teeth being arc-shaped, the contact line of the teeth changes from short to long and then back to short when inserted into the chain. The load on the teeth gradually increases and then gradually decreases, achieving smooth meshing with the chain. This significantly reduces the impact and vibration during the transmission process, and improves the stability and durability of the transmission.

[0010] Several heat dissipation vents are cut through the surface of the hub and distributed circumferentially along its axis. These vents can increase the contact area between the sprocket and the air. During the rotation of the sprocket, it is conducive to air circulation and can quickly dissipate the large amount of heat generated by friction under high-intensity operation, avoiding the accelerated wear of the sprocket due to heat accumulation. At the same time, it also reduces the phenomenon of deformation of the sprocket due to high temperature stress.

[0011] Furthermore, a central reinforcing sleeve is provided in the middle of the hub, and the outer side of the central reinforcing sleeve extends to one side of the surface of the heat dissipation vent and is located on one side of the center line of the heat dissipation vent. This design enhances the structural strength of the middle of the hub and improves the deformation resistance of the sprocket. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0013] Figure 1 This is a front view of the overall structure of this utility model.

[0014] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0015] The attached diagram is labeled as follows: 1. Hub; 2. Flange; 3. Connecting rib; 4. Gear tooth; 5. Center reinforcing sleeve; 6. Heat dissipation vent; 7. Mounting hole. Detailed Implementation

[0016] 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.

[0017] This embodiment discloses a helical tooth sprocket, including a hub 1, a rim 2, a connecting rib 3, teeth 4, a central reinforcing sleeve 5, a heat dissipation vent 6, and a mounting hole 7. The components work together to achieve the technical effect of improving heat dissipation performance and enhancing structural stability.

[0018] like Figure 1 As shown, the hub 1 is an annular structure, and its outer side is fixedly connected to the rim 2 by the connecting rib 3; the rim 2 is an annular structure concentric with the hub 1, and its outer diameter is larger than that of the hub 1. Several teeth 4 are integrally formed on the outer side along the circumferential direction; the connecting rib 3, the rim 2 and the teeth 4 can be integrally cast from high-strength alloy materials, which effectively avoids stress concentration caused by separate connection and improves the deformation resistance of the overall structure.

[0019] like Figure 1 and 2 As shown, each of the gear teeth 4 is distributed along the circumferential direction of the rim 2, and the vertical cross-sectional shape of the end of each gear tooth 4 away from the rim 2 is set to be arc-shaped.

[0020] This design allows the contact area of ​​tooth 4 to gradually expand from a point to a surface when it is inserted into the chain, resulting in a smoother meshing process and effectively reducing the impact and vibration during the meshing of traditional spur sprockets.

[0021] like Figure 1 As shown, a circular through hole is provided in the middle of the hub 1, and a central reinforcing sleeve 5 is interference-fitted in the through hole; the central reinforcing sleeve 5 can be made of high manganese steel, its axial length is consistent with the thickness of the hub 1, and its outer wall extends radially to one side of the surface of the heat dissipation port 6, and is located exactly at the center line of the heat dissipation port 6.

[0022] The central reinforcing sleeve 5 enhances the wear resistance of the through hole in the center of the hub 1, preventing excessive wear of the hole diameter when the sprocket plate is in long-term contact with the drive shaft. At the same time, its structure extending to the side of the heat dissipation vent 6 can improve the structural strength of the connection between the hub 1 and the connecting rib 3 without obstructing the heat dissipation vent 6.

[0023] like Figure 1 As shown, the surface of the hub 1 is uniformly provided with several heat dissipation holes 6 along the circumferential direction, and each heat dissipation hole 6 is elongated.

[0024] On the surface of the hub 1 between each pair of adjacent heat dissipation vents 6, there are also through holes 7, which are alternately distributed with the heat dissipation vents 6; used to fix the sprocket to the transmission mechanism by bolts.

[0025] The heat dissipation vent 6 increases the surface area of ​​the hub 1. At the same time, when the sprocket rotates, the airflow can form convection through the heat dissipation vent 6, which can quickly remove the heat generated by friction between the gear teeth 4 and the rim 2, thus avoiding the decrease in material strength and the aggravation of wear caused by high temperature.

[0026] The specific working principle is as follows: when the sprocket rotates with the drive shaft, the rotation trajectory of the tooth 4 gradually meshes with the chain. The end of the arc-shaped tooth 4 first contacts the inner arc of the chain, and then the contact area gradually increases, significantly improving the meshing stability. The central reinforcing sleeve 5 enhances the wear resistance and deformation resistance of the hub 1. The heat dissipation port 6 dissipates heat quickly through airflow convection. Combined with the high-strength structure of the integrally formed connecting rib 3, rim 2, and tooth 4, it effectively solves the problems of poor heat dissipation, easy wear, and easy deformation of existing helical tooth sprockets.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sprocket segment, characterized in that: Includes a hub (1), with a rim (2) fitted on the outer side of the hub (1), and a plurality of teeth (4) provided on the outer side of the rim (2), and the vertical cross-section of one end of each tooth (4) is set to be arc-shaped so that the tooth (4) can be inserted into the chain; A central reinforcing sleeve (5) is provided in the middle of the hub (1), and several heat dissipation vents (6) are provided through the surface of the hub (1).

2. The helical toothed sprocket segment according to claim 1, characterized in that: The outer side of the central reinforcing sleeve (5) extends to one side of the surface of the heat dissipation port (6), and the outer side of the central reinforcing sleeve (5) is located on one side of the center line of the heat dissipation port (6).

3. The helical toothed sprocket segment of claim 1, wherein: The multiple heat dissipation vents (6) are distributed around the circumference of the hub (1) axis, and a mounting hole (7) is provided between each two adjacent heat dissipation vents (6), and the mounting hole (7) is opened through the surface of the hub (1).

4. The helical toothed sprocket segment of claim 1, wherein: A connecting rib (3) is fixedly provided between the wheel rim (2) and the wheel tooth (4), and the connecting rib (3), wheel rim (2) and wheel tooth (4) are integrally formed.

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