Through hole type conjoined synchronous pulley

Abstract

The utility model relates to a through hole type conjoined synchronous pulley, which aims at solving the technical problems that the conjoined synchronous pulley with a bearing function is formed by arranging double rows of steel balls or roller pins between an outer sleeve and an inner sleeve which are less adopted as an outer ring and an inner ring of similar products. Equally-spaced teeth are arranged on the outer diameter of an outer ring wheel body of the conjoined synchronous belt wheel. The bearing is characterized in that double rows of roller pins, double rows of steel balls or a combination of one roller pin and one steel ball are arranged between the inner diameter of the outer ring wheel body and the outer diameter of the inner sleeve at equal intervals, the inner sleeve is a through hole concentric inner sleeve or a through hole eccentric inner sleeve, and at least one end of the inner sleeve extending out of the outer ring wheel body is provided with a through screw hole. Dustproof covers are respectively arranged at annular orifices of the outer ring wheel body on two sides of the outer diameter of the inner sleeve; protruding limiting parts are arranged on the end faces of the two sides of the equally-spaced teeth of the outer ring wheel body respectively, and the screw holes of the inner sleeve are arranged at 90 degrees or 120 degrees. The inner through hole type conjoined synchronous pulley is suitable for being used as an embroidery machine and other similar products.

Description

Technical Field

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

[0002] A synchronous belt pulley is a transmission mechanism consisting of a closed annular belt with equally spaced teeth on its inner circumference and corresponding pulleys. It is generally made of materials such as steel, aluminum alloy, cast iron, and brass, and its inner hole can be round, D-shaped, or tapered. It features: 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. Wide speed ratio range and a large power transmission range. For example, Chinese patent application number 2016109098076, authorized on April 27, 2018, entitled "A Tightening Synchronous Belt Pulley," describes a synchronous belt pulley with an inner liner, positioning disc, and connecting disc inside its outer sleeve, which are connected as a single unit by positioning screws and locking screws and installed on the transmission shaft sleeve. The aforementioned products and similar products rarely use an outer ring as the outer ring, an inner ring as the inner ring, and an integrated synchronous pulley with double rows of steel balls or needle rollers between the outer and inner rings to form a bearing function. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a through-hole type integrated synchronous pulley in the field, thereby solving the technical problem that existing similar products rarely use an outer sleeve as the outer ring, an inner sleeve as the inner ring, and a double row of steel balls or needle rollers between the outer and inner sleeves to form a bearing function in integrated synchronous pulleys. This objective is achieved through the following technical solution.

[0004] A through-hole type integrated synchronous pulley 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 sleeve. The inner sleeve is a through-hole concentric inner sleeve or a through-hole eccentric inner sleeve. At least one end of the inner sleeve extending beyond the outer ring has a through screw hole. Dust covers are respectively provided at the annular openings on both sides of the outer ring of the inner sleeve. Thus, the inner sleeve and outer ring form a bearing-type integrated synchronous pulley, reducing the number of parts during production and assembly, improving overall stability and robustness, and reducing 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 sleeve, 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] The screw holes of the inner sleeve are set at 90 degrees or 120 degrees.

[0008] This utility model has a reasonable structural design, diverse structural forms, good stability and balance, low working noise, low production cost, convenient assembly, and long service life. It is suitable for use as an internal through-hole type integrated synchronous belt pulley in embroidery machines and similar products, and as a further improvement of similar products. Attached Figure Description

[0009] Figure 1 This is a cross-sectional structural schematic diagram of Embodiment 1 of the present invention, showing a synchronous pulley with a concentric double-row needle roller in the middle through hole.

[0010] Figure 2 This is a cross-sectional structural schematic diagram of Embodiment 2 of this utility model, showing a through-hole eccentric double-row needle roller integrated synchronous belt pulley.

[0011] Figure 3 This is a cross-sectional structural schematic diagram of Embodiment 3 of this utility model. The diagram shows a synchronous pulley with a row of steel balls and a row of needle rollers connected together, with a through hole in the middle.

[0012] 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 connected together, eccentrically positioned in the middle of the through hole.

[0013] Figure 5 This is a cross-sectional structural schematic diagram of Embodiment 5 of this utility model, showing a synchronous pulley with concentric through holes and double rows of steel balls in the middle.

[0014] Figure 6 This is a cross-sectional structural schematic diagram of Embodiment Six of this utility model, showing a synchronous pulley with a through hole, an eccentric middle double row of steel balls.

[0015] Attached figures and their names: 1. Through-hole concentric inner sleeve, 2. Outer ring wheel body, 201. Limiting ring, 3. Needle roller, 4. Dust cover, 5. Through-hole eccentric inner sleeve, 6. Screw hole, 7. Steel ball. Implementation

[0016] 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 sleeve, there are equally spaced double rows of needle rollers 3, double rows of steel balls 7, or a combination of one needle roller and one steel ball. The inner sleeve is a through-hole concentric inner sleeve 1 or a through-hole eccentric inner sleeve 5. At least one end of the inner sleeve extending beyond the outer ring has a through screw hole 6. Dust covers 4 are respectively provided at the annular openings on both sides of the outer ring of the inner sleeve. 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 a combination of one groove and one wide slot on the inner diameter of the outer ring and the outer diameter of the inner sleeve, respectively. Raised limiting rings 201 are provided on both sides of the equally spaced teeth of the outer ring. The screw holes of the inner sleeve are set at 90 degrees or 120 degrees.

[0017] This integrated synchronous pulley improves upon the existing synchronous pulley design by creating two grooves, two wide grooves, or a combination of one groove and one wide groove between the inner and outer sleeves. Each end face has a dustproof groove. Specific structural improvements are as follows: 1. An inner sleeve is added, with two grooves, two wide grooves, or a combination of one groove and one wide groove in the middle of its outer circumference. Two screw holes are provided at each end of the outer circumference for fixing the inner sleeve to the shaft with set screws. The inner sleeve is available in concentric and eccentric versions; the eccentric inner sleeve facilitates adjustment of the synchronous belt tension, eliminating the need for the original adjustment device. 2. The inner sleeve is placed inside the outer sleeve of the synchronous pulley, and steel balls or needle rollers are installed in the inner grooves and wide grooves. Dustproof covers are installed on both end faces.

[0018] 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 through hole divided into a central hole and an eccentric hole, 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 through hole divided into a central hole and an eccentric hole, 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 divided into a central hole and an eccentric hole, which is suitable for high-speed operation.

[0019] In summary, this integrated synchronous pulley uses the outer sleeve of the existing synchronous pulley as the outer ring of the bearing and the inner sleeve as the inner ring of the bearing. A combination of double-row needle rollers, double-row steel balls, or one needle roller and one steel ball is installed between the outer and inner sleeves, which saves costs and provides better balance and stability. 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 a bearing into the fixing plate, and then connecting the synchronous pulley and bearing with a shaft. Instead, it combines the outer sleeve of a synchronous pulley, the inner sleeve of a synchronous pulley, and two rows of retainers into a single bearing-type integrated synchronous pulley. The advantages are cost savings, reduced cumulative tolerances from assembling multiple parts, and improved product accuracy and service life.

Claims

1. A through-hole type 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 sleeve are provided with double rows of needle rollers (3), double rows of steel balls (7) or a combination of one needle roller and one steel ball. The inner sleeve is a through hole concentric inner sleeve (1) or a through hole eccentric inner sleeve (5). At least one end of the inner sleeve extending out of the outer ring wheel body is provided with a through screw hole (6). The annular openings on both sides of the outer ring wheel body of the inner sleeve are respectively provided with dust covers (4).

2. The through-hole type integrated synchronous belt pulley according to claim 1, characterized in that... The double-row needle rollers (3), double-row steel balls (7), 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 sleeve, respectively.

3. The through-hole type integrated synchronous belt 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.

4. The through-hole type integrated synchronous belt pulley according to claim 1, characterized in that... The screw holes (6) of the inner sleeve are set at 90 degrees or 120 degrees.

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