Connecting shaft type one-piece synchronous pulley

Abstract

The utility model relates to a connecting shaft type one-piece synchronous pulley, which aims at solving the technical problems of poor balance and stability, large noise, high production cost and inconvenience in installation and use due to the fact that few similar products adopt inner shafts as inner ring structural design of one-piece bearings. Equally-spaced teeth are arranged on the outer diameter of an outer ring wheel body of the conjoined synchronous belt wheel. The rolling wheel is characterized in that double rows of rolling needles, double rows of steel balls or a combination of one rolling needle and one steel ball are arranged between the inner diameter of the outer ring wheel body and the outer diameter of the inner shaft at equal intervals, the inner shaft is a connecting shaft concentric inner shaft or a connecting shaft eccentric inner shaft, and the centers of the two ends of the inner shaft extending out of the outer ring wheel body are provided with protruding installation columns with external threads respectively. Dustproof covers are respectively arranged at annular orifices formed by the two sides of the outer diameter of the inner shaft and the inner diameter of the outer ring wheel body in a flush manner; and the double rows of rolling needles, the double rows of steel balls or a combination of one rolling needle and one steel ball respectively correspond to two channels, two wide grooves or a combination of one channel and one wide groove of the inner diameter of the wheel body of the outer ring and the outer diameter of the inner shaft.

Description

Technical Field

[0001] This utility model relates to a synchronous belt pulley, specifically a shaft-type integrated synchronous belt pulley. Background Technology

[0002] Synchronous belt pulleys are transmission mechanisms consisting of a closed-loop rubber belt with equally spaced teeth on its inner circumference and corresponding pulleys. They are generally made of materials such as steel, aluminum alloy, cast iron, and brass, and their inner holes can be round, D-shaped, or tapered. They feature: 1. Accurate transmission, no slippage during operation, and a constant transmission ratio; 2. Smooth transmission, with buffering and vibration damping capabilities, and low noise; 3. High transmission efficiency and significant energy-saving effect; 4. Convenient maintenance, no lubrication required, and low maintenance costs; 5. A wide speed ratio range and a large power transmission range. Some similar pulleys are fixed and installed via a rotating shaft or inner shaft, such as application number 202120730439.5 disclosed in Chinese patent literature, authorized on February 18, 2022, entitled "A Stable Synchronous Belt Pulley"; this synchronous belt pulley has protruding extension rings at both ends of its main body, and an inner ring with a rectangular protrusion on one side and symmetrical limiting sliders on both sides. However, the aforementioned shaft or inner shaft is not used as the inner ring of the connecting bearing, which makes production and assembly more inconvenient, results in poor balance and stability, higher noise, and higher production costs. Summary of the Invention

[0003] To overcome the aforementioned shortcomings, the purpose of this utility model is to provide a shaft-type integrated synchronous pulley in the field, thereby solving the technical problems of existing similar products rarely using an inner shaft as the inner ring structure design of the integrated bearing, resulting in poor balance and stability, high noise, high production cost, and inconvenient installation and use. This objective is achieved through the following technical solution.

[0004] A type of integrated synchronous pulley with a shaft is disclosed. The outer ring of the pulley has equally spaced teeth on its outer diameter. Key structural design features equidistant double rows of needle rollers, double rows of steel balls, or a combination of one needle roller and one steel ball between the inner diameter of the outer ring and the outer diameter of the inner shaft. The inner shaft is either a concentric or eccentric shaft. Each end of the inner shaft extending beyond the outer ring has a protruding mounting post with external threads at its center. Annular openings formed on both sides of the inner shaft's outer diameter, flush with the inner diameter of the outer ring, are fitted with dust covers. Thus, the inner shaft and outer ring form a bearing-type integrated synchronous pulley, which can be directly mounted to corresponding equipment or mechanisms via the mounting posts at both ends of the inner shaft. This reduces the number of parts during production and assembly, improves overall stability and robustness, and reduces operating noise.

[0005] The double-row needle rollers, double-row steel balls, or one needle roller and one steel ball combination correspond to two grooves, two wide slots, or one groove and one wide slot combination on the inner diameter of the outer ring wheel and the outer diameter of the inner shaft, respectively.

[0006] The outer ring wheel body has raised limiting rings on both sides of the equally spaced teeth. This structure further facilitates the production and assembly of the outer ring wheel body.

[0007] This utility model has a reasonable structural design, good stability and balance, low operating noise, low production cost, convenient assembly, and long service life; it is suitable for use as a shaft-type integrated synchronous belt pulley in embroidery machines and similar products, and for further improvement of similar products. Attached Figure Description

[0008] Figure 1 This is a cross-sectional structural schematic diagram of Embodiment 1 of the present invention, showing a coaxial, concentric, double-row needle roller integrated synchronous belt pulley.

[0009] Figure 2 This is a cross-sectional structural schematic diagram of Embodiment 2 of this utility model, showing a eccentric double-row needle roller integrated synchronous belt pulley.

[0010] Figure 3 This is a cross-sectional structural schematic diagram of Embodiment 3 of this utility model. The diagram shows a synchronous belt pulley with a row of steel balls and a row of needle rollers in the middle, connected by a shaft and concentricity.

[0011] Figure 4 This is a cross-sectional structural schematic diagram of Embodiment 4 of this utility model. The diagram shows a synchronous belt pulley with a row of steel balls and a row of needle rollers in the middle, which is eccentrically connected.

[0012] Figure 5 This is a cross-sectional structural schematic diagram of Embodiment 5 of this utility model, showing a coaxial, concentric, double-row steel ball integrated synchronous belt pulley.

[0013] Figure 6 This is a cross-sectional structural schematic diagram of Embodiment Six of this utility model, showing a eccentric, double-row steel ball integrated synchronous belt pulley.

[0014] The attached figures are numbered and named as follows: 1. Coupling inner shaft, 2. Outer ring wheel, 201. Limiting ring, 3. Needle roller, 4. Dust cover, 5. Coupling eccentric inner shaft, 6. Steel ball. Implementation

[0015] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-6As shown, the outer ring of the integrated synchronous pulley 2 has equally spaced teeth on its outer diameter. Between the inner diameter of the outer ring and the outer diameter of the inner shaft, there are equally spaced double rows of needle rollers 3, double rows of steel balls 6, or a combination of one needle roller and one steel ball. The inner shaft is either a coaxial concentric inner shaft 1 or a coaxial eccentric inner shaft 5. The two ends of the inner shaft extending beyond the outer ring have protruding mounting posts with external threads at their centers. Dust covers 4 are provided at the annular openings formed by the inner shaft's outer diameter and the outer ring's inner diameter, respectively. The aforementioned double rows of needle rollers, double rows of steel balls, or a combination of one needle roller and one steel ball correspond to two grooves, two wide slots, or one groove and one wide slot combination on the inner diameter of the outer ring and the outer diameter of the inner shaft, respectively. Protruding limiting rings 201 are provided on both ends of the equally spaced teeth of the outer ring.

[0016] This integrated synchronous pulley combines the inner shaft and inner sleeve of an existing synchronous pulley into a single unit. Two grooves, two wide slots, or a combination of one groove and one wide slot are provided between the outer sleeve and the inner shaft. A dustproof groove is designed on each of the two end faces. The specific structural improvements are as follows: 1. An additional inner shaft is added, with two grooves, two wide slots, or a combination of one groove and one wide slot provided in the middle of its outer circumference. Threads are provided on the outer circumferences at both ends of the shaft to lock the synchronous pulley to a fixed plate. 2. The inner shaft is placed into the inner sleeve of the synchronous pulley, and then steel balls or needle rollers are installed in the inner grooves and wide slots. Dustproof covers are installed on both end faces.

[0017] like Figure 1 , Figure 2 As shown, this integrated synchronous pulley has two rows of needle rollers in the middle, and its inner core is a solid shaft divided into a central shaft and an eccentric shaft, suitable for heavy-load operation. Figure 3 , Figure 4 As shown, this integrated synchronous pulley has a row of needle rollers and a row of steel balls in the middle, and its inner core is a solid shaft divided into a central shaft and an eccentric shaft, suitable for heavy-load operation. Figure 5 , Figure 6 As shown, the integrated synchronous pulley has two rows of steel balls in the middle, and the inner core is a solid shaft divided into a central shaft and an eccentric shaft, which is suitable for high-speed operation.

[0018] In summary, this integrated synchronous pulley changes the existing method of using a single synchronous pulley in the middle, inserting a fixing plate on each side, pressing bearings into the fixing plates, and then connecting the synchronous pulley and bearings with a shaft. Instead, it combines the outer casing of a synchronous pulley, a shaft (inner shaft), and two rows of retainers into a single bearing-type integrated synchronous pulley. The advantages are cost savings, reduced cumulative tolerances due to the assembly of multiple parts, and improved product accuracy and service life.

Claims

1. A type of integrated synchronous belt pulley, wherein the outer ring of the integrated synchronous belt pulley (2) has equally spaced teeth on its outer diameter; characterized in that... The inner diameter of the outer ring wheel body (2) and the outer diameter of the inner shaft are provided with double rows of needle rollers (3), double rows of steel balls (6) or a combination of one needle roller and one steel ball. The inner shaft is a coaxial concentric inner shaft (1) or a coaxial eccentric inner shaft (5). The two ends of the inner shaft extending out of the outer ring wheel body are respectively provided with a protruding mounting post with external thread. The annular openings formed on both sides of the outer diameter of the inner shaft and the inner diameter of the outer ring wheel body are respectively provided with dust covers (4).

2. The coupling-type integrated synchronous pulley according to claim 1, characterized in that... The double-row needle rollers (3), double-row steel balls (6), or a combination of one needle roller and one steel ball correspond to two grooves, two wide slots, or a combination of one groove and one wide slot on the inner diameter of the outer ring wheel body (2) and the outer diameter of the inner shaft, respectively.

3. The coupling-type integrated synchronous pulley according to claim 1, characterized in that... The outer ring wheel body (2) has raised limiting rings (201) on both sides of the equally spaced teeth.

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