Double-end type conjoined synchronous pulley

Abstract

The utility model relates to a double-end type conjoined synchronous pulley, which aims at solving the problems that similar products rarely adopt a core sleeve or an inner shaft as a bearing inner ring, a gear sleeve is connected with the core sleeve or the inner shaft into a whole, and bearing outer rings are respectively arranged at the outer diameters of two ends; and steel balls are arranged between the outer rings of the bearings at the two ends and the integrated gear sleeve to form the connected synchronous pulley. Equally-spaced teeth are arranged on the outer diameter of the middle of an inner shaft or an inner sleeve of the one-piece synchronous belt wheel. The bearing is characterized in that the two ends of the inner shaft or the inner sleeve are lengthened and extend out respectively, one or two grooves are formed in the outer diameter of the lengthened position, bearing outer rings are arranged on the outer sides of the lengthened positions of the grooves respectively, one or two rows of steel balls are arranged between the one or two grooves in one side of the inner diameter of each bearing outer ring and the one or two grooves in the other symmetrical side, and the steel balls are arranged in the grooves. And dustproof covers are respectively arranged at annular orifices outside the steel balls. According to the conjoined synchronous pulley, the two ends of an existing holed synchronous pulley or a solid synchronous pulley are lengthened, and the two lengthened ends are each additionally provided with an outer ring and a corresponding steel ball.

Description

Technical Field

[0001] This utility model relates to a synchronous belt pulley, specifically a double-headed, 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 with no slippage during operation and a constant transmission ratio; 2. Smooth transmission with buffering and vibration reduction capabilities, resulting in low noise; 3. High transmission efficiency and significant energy savings; 4. Convenient maintenance with no lubrication required and low maintenance costs; 5. A wide speed ratio range and a large power transmission range. For example, Chinese patent application number 202421180050.8, authorized on December 30, 2024, entitled "A Highly Stable Synchronous Belt Pulley," describes a synchronous belt pulley comprising a pulley assembly, a first bearing, and a second bearing. The pulley assembly includes a tail sleeve, a core sleeve, and a gear sleeve. The tail sleeve has a slot at its bottom, and the connecting part of the gear sleeve is inserted into the slot. The core sleeve has a mounting part that is inserted into the gear sleeve, and the core sleeve has a central insertion hole. The first bearing and the second bearing are respectively mounted on the upper and lower end faces of the insertion hole. However, the aforementioned product and similar products rarely use a core sleeve or inner shaft as the inner ring of the bearing, or a gear sleeve integrated with the core sleeve or inner shaft, with bearing outer rings set at both ends of the outer diameter, and steel balls arranged between the bearing outer rings at both ends and the integrated gear sleeve to form a bearing function in a single-piece synchronous belt pulley. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a double-headed integrated synchronous pulley in the field, thereby solving the technical problem that existing similar products rarely use a core sleeve or inner shaft as the inner ring of the bearing, and that the gear sleeve is integrated with the core sleeve or inner shaft, with bearing outer rings set at both ends of the outer diameter, and steel balls arranged between the bearing outer rings at both ends and the integrated gear sleeve to form a bearing function in the integrated synchronous pulley. This objective is achieved through the following technical solution.

[0004] A double-headed integrated synchronous pulley, wherein the inner shaft or inner sleeve has equally spaced teeth on its outer diameter; the key structural design features are that the two ends of the inner shaft or inner sleeve are extended and extended, and one or two grooves are provided on the outer diameter of the extended part. Bearing outer rings are provided on the outer side of the extended part of the grooves. One or two rows of steel balls are inserted between one or two grooves on one side of the inner diameter of the bearing outer ring and one or two grooves on the symmetrical other side. Dust covers are provided on the annular openings on the outer side of the steel balls.

[0005] The inner shaft or inner sleeve has raised limiting rings on both sides of the equally spaced teeth in the middle.

[0006] The inner sleeve is further extended at both ends with dust covers, and at least one end of the inner sleeve has a through screw hole.

[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 shaft-type synchronous pulley with two single rows of steel balls connected at both ends.

[0010] Figure 2 This is a cross-sectional structural schematic diagram of Embodiment 2 of this utility model, showing a shaft-type double-row steel ball integrated synchronous pulley.

[0011] Figure 3 This is a cross-sectional structural schematic diagram of Embodiment 3 of this utility model, showing a through-hole type double-end single-row steel ball integrated synchronous pulley.

[0012] Figure 4 This is a cross-sectional structural schematic diagram of Embodiment 4 of this utility model, showing a through-hole type double-row steel ball integrated synchronous pulley.

[0013] Attached figures and their names: 1. Inner shaft, 2. Bearing outer ring, 3. Steel ball, 4. Dust cover, 5. Limiting ring, 6. Inner sleeve, 601. Screw hole. Implementation

[0014] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-4 As shown, the inner shaft 1 or inner sleeve 6 of the integrated synchronous pulley has equally spaced teeth on its outer diameter. Both ends of the inner shaft or inner sleeve are extended, and one or two grooves are provided on the outer diameter of the extended sections. Bearing outer rings 2 are provided on the outer sides of the extended sections. One or two rows of steel balls 3 are inserted between one or two grooves on one side of the inner diameter of the bearing outer ring and one or two grooves on the symmetrical side. Dust covers 4 are provided on the annular openings on the outer sides of the steel balls. Raised limiting rings 5 ​​are provided on both end faces of the equally spaced teeth in the middle of the inner shaft or inner sleeve. Dust covers are further extended at both ends of the inner sleeve, and at least one end of the inner sleeve has a through screw hole 601. The screw holes of the inner sleeve are set at 90 degrees or 120 degrees.

[0015] This integrated synchronous pulley extends both ends of an existing perforated or solid synchronous pulley. First, one or two grooves are provided on the outer diameter of each extended section. Then, two screw holes are provided next to the grooves of the perforated synchronous pulley. Next, an outer ring is added to each of the extended ends, with one or two grooves in the middle of the outer ring to match the grooves of the extended section of the synchronous pulley. Finally, one or two rows of steel balls are installed in the inner grooves, and dust covers are installed on both end faces.

[0016] like Figure 1 , Figure 3 As shown, this integrated synchronous pulley has a groove at each end and an additional single-groove outer ring on each end. The inner core is a solid shaft and a bore shaft, suitable for high-speed operation. Figure 2 , Figure 4 As shown, the integrated synchronous pulley has two grooves at each end and an additional double-groove outer ring at each end. The inner core is a solid shaft and a bore shaft, suitable for high-speed, heavy-load operation.

[0017] In summary, existing similar products use a central synchronous pulley with two fixing plates on either side. Bearings are then pressed into the fixing plates, and a shaft connects the synchronous pulley to the bearings. This integrated synchronous pulley combines a synchronous pulley, a shaft or sleeve, and two bearings into a single bearing-type integrated synchronous pulley. Its advantages include cost savings, reduced cumulative tolerances from assembling multiple parts, and improved product precision and lifespan.

Claims

1. A double-headed integrated synchronous pulley, wherein the inner shaft (1) or inner sleeve (6) of the integrated synchronous pulley has equally spaced teeth on its outer diameter; characterized in that... The two ends of the inner shaft (1) or inner sleeve (6) are extended and extended, and one or two grooves are provided on the outer diameter of the extended part. The outer side of the extended part of the groove is provided with a bearing outer ring (2). One or two rows of steel balls (3) are installed between one or two grooves on one side of the inner diameter of the bearing outer ring and one or two grooves on the other side. The annular openings on the outer side of the steel balls are provided with dust covers (4).

2. The double-headed integrated synchronous pulley according to claim 1, characterized in that... The inner shaft (1) or inner sleeve (6) has raised limiting rings (5) on both sides of the equally spaced teeth in the middle.

3. The double-headed integrated synchronous pulley according to claim 1, characterized in that... The inner sleeve (6) is further extended at both ends by dust covers (4), and at least one end of the inner sleeve is provided with a through screw hole (601).

4. The double-headed integrated synchronous pulley according to claim 3, characterized in that... The screw holes (601) of the inner sleeve (6) are set at 90 degrees or 120 degrees.

Images