A belt drive speed reduction mechanism

Abstract

The present application relates to the technical field of reducers, and in particular to a belt-driven reduction mechanism, which is provided with a reduction box body, a first transmission shaft and a second transmission shaft are provided on the reduction box body, an adapter plate is provided on the first transmission shaft, a small pulley is provided on the first transmission shaft, a large pulley is provided on the second transmission shaft, the small pulley and the large pulley are connected by a toothed belt, and the second transmission shaft is installed on an eccentric bearing seat. By providing an eccentric bearing seat, the position of the large pulley can be adjusted by rotating the eccentric bearing seat, thereby changing the tension of the toothed belt. The tension adjustment can be achieved without complicated tools or professional skills, thereby improving maintenance efficiency. The eccentric bearing seat enables the toothed belt to adapt to the tensioning requirements under different working conditions. Appropriate tension of the toothed belt can ensure the stability of power transmission, reduce the transmission efficiency drop and belt wear caused by loose or overtightened belts, and improve the adaptability of the equipment.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reducers, in particular to a belt-driven speed reducer mechanism. Background Art

[0002] At present, the reduction gears of aerodynamic boats are basically gear-type. Gear reduction gears often adopt complex gear meshing mechanisms, which not only require extremely high process precision in production, resulting in high production costs, but also their overall structure is mostly heavy aluminum castings, which are heavy, adding a burden to the navigation performance of aerodynamic boats and reducing the agility and efficiency of the ship.

[0003] In contrast, the belt type has a relatively simple structure, low machining difficulty and cost, and is lightweight, so it is widely welcomed. There are many forms of belt type speed reduction mechanisms on the market, such as the patent number: ZL201710780733.5, and the patent name is: A utility model patent for a belt gear reducer. The patent is provided with an adjustment mechanism, and by adjusting the adjustment mechanism, the distance between the small pulley and the large pulley can be adjusted, thereby adjusting the tightness of the belt.

[0004] However, in actual production and use, the adjustment mechanism is relatively complex, which increases the manufacturing cost and assembly difficulty. The adjustment method is not only time-consuming and labor-intensive, but also may lead to inaccurate adjustment due to improper operation. Once a failure occurs or maintenance is required, the difficulty of repair will increase accordingly. In addition, the product design is unreasonable and cannot automatically correct small position deviations, which reduces the equipment's adaptability to different working conditions and product performance. Summary of the invention

[0005] To solve the above problems, the present application provides a belt-driven reduction mechanism, which is provided with a reduction housing, on which a first transmission shaft and a second transmission shaft are provided, an adapter plate is provided on the first transmission shaft, a small pulley is provided on the first transmission shaft, a large pulley is provided on the second transmission shaft, the small pulley and the large pulley are connected by a toothed transmission belt, an eccentric bearing seat is provided on the reduction housing, and the second transmission shaft is mounted on the eccentric bearing seat.

[0006] In one embodiment, the transfer plate includes a transfer female plate and a transfer male plate, and a flexible coupling spacer is provided between the transfer female plate and the transfer male plate.

[0007] In one embodiment, a deep groove ball bearing is arranged on the first transmission shaft, and the deep groove ball bearing is placed in a bearing sleeve. A seat bearing is arranged at the end of the first transmission shaft, and the bearing sleeve and the seat bearing are both fixedly mounted on the reduction gear box body.

[0008] In one embodiment, bearing end covers are provided on both sides of the eccentric bearing seat, two double-row tapered roller bearings are provided between the second transmission shaft and the eccentric bearing seat, and a bearing inner spacer is provided between the two double-row tapered roller bearings.

[0009] In one embodiment, a propeller connecting member is disposed at the end of the second transmission shaft, and a propeller is disposed on the propeller connecting member.

[0010] In one embodiment, the propeller connecting member includes a propeller seat, a propeller seat spacer, and a hub positioning sleeve.

[0011] In one embodiment, the reduction gear box includes a front plate, a rear plate, side plates and a top plate. The front plate and the rear plate are both provided with reinforcing ribs. An eccentric bearing seat mounting hole is provided on the front plate, and a first transmission shaft mounting hole is symmetrically provided on the front plate and the rear plate.

[0012] The beneficial effects of the utility model are:

[0013] The present application discloses a belt-driven speed reduction mechanism, which is provided with a speed reduction housing, a first transmission shaft and a second transmission shaft are provided on the speed reduction housing, a transfer plate is provided on the first transmission shaft, a small pulley is provided on the first transmission shaft, a large pulley is provided on the second transmission shaft, the small pulley and the large pulley are connected by a toothed belt, and the second transmission shaft is installed on an eccentric bearing seat. When the equipment is running, when the power source starts and drives the first transmission shaft to rotate, the small pulley rotates accordingly, and because the toothed belt is closely matched with the tooth grooves of the small pulley and the large pulley, the toothed belt drives the large pulley to rotate, and the rotation of the large pulley is output through the second transmission shaft to drive subsequent equipment. In the present application, by providing an eccentric bearing seat, the position of the large pulley can be adjusted simply by rotating the eccentric bearing seat, thereby changing the tension of the toothed conveyor belt. The tension adjustment can be achieved without complex tools or professional skills, thereby improving maintenance efficiency. The eccentric bearing seat enables the toothed conveyor belt to adapt to the tensioning requirements under different working conditions. Appropriate tension of the toothed conveyor belt can ensure the stability of power transmission, reduce the decrease in transmission efficiency and belt wear caused by loose or over-tightened belts, and improve the adaptability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0016] Figure 3 This is the front view of the utility model;

[0017] Figure 4 for Figure 3 Middle AA section view;

[0018] Figure 5 This is an exploded view of the utility model;

[0019] Figure 6 To install the propeller status diagram;

[0020] Figure 7 This is the internal view of the reduction gearbox;

[0021] Explanation of symbols in the figure:

[0022] 1. Speed ​​reducer housing; 11. Housing front plate; 12. Housing rear plate; 13. Housing side plate; 14. Housing top plate; 15. Reinforcement ribs; 16. Eccentric bearing seat mounting hole; 17. First transmission shaft mounting hole;

[0023] 2. The first transmission shaft;

[0024] 21. Transfer plate; 211. Transfer female plate; 212. Transfer male plate; 213. Flexible coupling spacer;

[0025] 22. Small pulley; 23. Deep groove ball bearing; 24. Bearing sleeve; 25. Pillow block bearing;

[0026] 3. Second transmission shaft; 31. Large pulley;

[0027] 32. Propeller connector; 321. Propeller seat; 322. Propeller seat spacer; 323. Propeller hub positioning sleeve;

[0028] 33. Propeller;

[0029] 4. Toothed conveyor belt;

[0030] 5. Eccentric bearing seat; 51. Bearing end cover; 52. Double-row tapered roller bearing; 53. Bearing inner spacer. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0032] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] like Figure 1-5 As shown, a belt-driven reduction mechanism is provided with a reduction box body 1, on which a first transmission shaft 2 and a second transmission shaft 3 are provided, on which a transfer plate 21 is provided, on which a small pulley 22 is provided, on which a large pulley 31 is provided, and the small pulley 22 and the large pulley 31 are connected by a toothed belt 4, on which an eccentric bearing seat 5 is provided, and on which the second transmission shaft 3 is mounted.

[0034] Specifically, the power source (such as a motor) is connected to the adapter plate 21 of the first transmission shaft 2, and the small pulley 22 is fixedly mounted on the first transmission shaft 2 and rotates with the rotation of the first transmission shaft 2. The toothed belt 4 is wrapped around the small pulley 22 and the large pulley 31. The inner side of the toothed belt 4 has teeth that match the tooth grooves of the small pulley 22 and the large pulley 31 to achieve stable transmission of power. The large pulley 31 is fixedly mounted on the second transmission shaft 3 and rotates with the rotation of the second transmission shaft 3. The large pulley 31 receives power from the small pulley 22 through the toothed belt 4. The second transmission shaft 3 is mounted on an eccentric bearing seat 5. The design of the eccentric bearing seat 5 makes its center of circle not coincide with the axis of the second transmission shaft 3. The position of the large pulley 31 relative to the small pulley 22 is adjusted by rotating the eccentric bearing seat 5, thereby adjusting the tension of the toothed belt 4. When the equipment is running, the power source starts and drives the first transmission shaft 2 to rotate, and the small pulley 22 rotates accordingly. Since the toothed belt 4 is closely matched with the tooth grooves of the small pulley 22 and the large pulley 31, the toothed belt 4 drives the large pulley 31 to rotate, and the rotation of the large pulley 31 is output through the second transmission shaft 3 to drive the subsequent equipment. In this application, by setting an eccentric bearing seat 5, the position of the large pulley 31 can be simply adjusted by rotating the eccentric bearing seat 5, thereby changing the tension of the toothed belt 4. The tension adjustment can be achieved without complex tools or professional skills, thereby improving maintenance efficiency; the eccentric bearing seat 5 enables the toothed belt 4 to adapt to the tensioning requirements under different working conditions. The appropriate tension of the toothed belt can ensure the stability of power transmission, reduce the decrease in transmission efficiency and belt wear caused by loose or over-tight belts, and improve the adaptability of the equipment.

[0035] like Figure 2 , 5As shown, the transfer disk 21 includes a transfer female disk 211 and a transfer male disk 212 , and a flexible coupling spacer 213 is provided between the transfer female disk 211 and the transfer male disk 212 .

[0036] Specifically, the flexible coupling spacer 213 is used to realize a soft connection between the transfer mother disk 211 and the transfer male disk 212, allowing a certain relative movement between the transfer mother disk 211 and the transfer male disk 212, thereby correcting the slight position deviation caused by processing, error installation and other reasons. When sudden acceleration and emergency stop occur, the impact and vibration generated by the power source are relatively large. The flexible coupling spacer 213 can effectively absorb and alleviate the impact and vibration, avoiding direct transmission to the transfer disk 21, causing equipment damage. By providing the flexible coupling spacer 213, the stress concentration and fatigue damage of the transfer disk 21 under extreme working conditions are reduced, and the service life of the transfer disk 21 and the entire reduction mechanism is extended.

[0037] like Figure 1 , 4 As shown in Figure 5, a deep groove ball bearing 23 is provided on the first transmission shaft 2, and the deep groove ball bearing 23 is placed in a bearing sleeve 24. A seat bearing 25 is provided at the end of the first transmission shaft 2, and the bearing sleeve 24 and the seat bearing 25 are both fixedly mounted on the reduction box body 1.

[0038] Specifically, retaining rings are provided on both sides of the first transmission shaft 2, and the deep groove ball bearing 23 is installed in the bearing sleeve 24 and fixedly installed on the reduction box body 1. When the first transmission shaft 2 rotates, the deep groove ball bearing 23 bears axial and radial loads and allows the first transmission shaft 2 to make a certain degree of axial displacement. The seat bearing 25 mainly bears radial loads, and the seat bearing 25 ensures stable support of the first transmission shaft 2 at the end, which helps to prevent bending or vibration of the shaft. The combination of the deep groove ball bearing 23 and the seat bearing 25 provides stable support for the first transmission shaft 2, reduces vibration and stress caused by shaft misalignment or installation errors, and thus improves the stability of the transmission.

[0039] like Figure 4 , 5 As shown, bearing end covers 51 are provided on both sides of the eccentric bearing seat 5, two double-row tapered roller bearings 52 are provided between the second transmission shaft 3 and the eccentric bearing seat 5, and a bearing inner spacer 53 is provided between the two double-row tapered roller bearings 52.

[0040] Specifically, the bearing end caps 51 are fixedly mounted on both sides of the eccentric bearing seat 5, ensuring the stable positioning of the bearing and the transmission shaft and preventing their axial movement during operation. The double-row tapered roller bearing 52 provides stable support for the second transmission shaft 3 and can withstand large radial and axial loads. The bearing inner spacer 53 is arranged between the two double-row tapered roller bearings 52, mainly playing the role of separation and positioning, ensuring that the relative position between the two double-row tapered roller bearings 52 is fixed, and preventing damage or performance degradation caused by mutual extrusion between the double-row tapered roller bearings 52. At the same time, the bearing inner spacer 53 also helps to disperse the load borne by the bearing and improve the stability and life of the entire transmission system.

[0041] like Figure 4 , 6 As shown, a propeller connecting member 32 is disposed at the end of the second transmission shaft 3 , and a propeller 33 is disposed on the propeller connecting member 32 .

[0042] Specifically, a propeller connector 32 is provided at the end of the second transmission shaft 3, and a propeller 33 is fixed by the propeller connector 32. The propeller 33 is composed of a plurality of spiral blades. The power source drives the second transmission shaft 3 to rotate, and is transmitted to the propeller 33 through the propeller connector 32. When the propeller 33 rotates, the spiral blades interact with the air and are converted into kinetic energy for the hull to move forward.

[0043] like Figure 4 , 5 As shown, the propeller connector 32 includes a propeller seat 321 , a propeller seat spacer 322 , and a hub positioning sleeve 323 .

[0044] Specifically, the propeller seat 321 serves as the main connecting component between the propeller 33 and the second transmission shaft 3 to ensure that the propeller 33 does not loosen or fall off during rotation. The propeller seat spacer 322 is used to adjust the gap between the propeller seat 321 and the eccentric bearing seat 5 to reduce vibration. The hub positioning sleeve 323 ensures that the hub of the propeller 33 can be accurately installed on the propeller seat 321 to maintain the stability of the propeller 33. When the second transmission shaft 3 rotates, the propeller 33 is driven to rotate through the propeller seat 321, thereby driving the hull forward.

[0045] like Figure 1 , 7 As shown, the reduction gear box 1 includes a box front plate 11, a box rear plate 12, a box side plate 13, and a box top plate 14. The box front plate 11 and the box rear plate 12 are both provided with reinforcing ribs 15. The box front plate 11 is provided with an eccentric bearing seat mounting hole 16. The box front plate 11 and the box rear plate 12 are symmetrically provided with a first transmission shaft mounting hole 17.

[0046] Specifically, the reduction box body 1 provides a stable support and positioning for the transmission shaft, protecting the internal transmission mechanism from the influence of the external environment. The reinforcing rib 15 increases the rigidity and strength of the plate, the eccentric bearing seat mounting hole 16 is used to install the eccentric bearing seat 5, and the first transmission shaft mounting hole 17 helps to ensure the stable operation of the first transmission shaft 2 in the reduction box body 1.

[0047] The present application discloses a belt-driven speed reduction mechanism, which is provided with a speed reduction housing 1, a first transmission shaft 2 and a second transmission shaft 3 are provided on the speed reduction housing 1, an adapter plate 21 is provided on the first transmission shaft 2, a small pulley 22 is provided on the first transmission shaft 2, a large pulley 31 is provided on the second transmission shaft 3, the small pulley 2 and the large pulley 3 are connected by a toothed belt 4, and the second transmission shaft 3 is installed on an eccentric bearing seat 5. When the equipment is running, when the power source starts and drives the first transmission shaft 2 to rotate, the small pulley 22 rotates accordingly, and because the toothed belt 4 is closely matched with the tooth grooves of the small pulley 22 and the large pulley 31, the toothed belt 4 drives the large pulley 31 to rotate, and the rotation of the large pulley 31 is output through the second transmission shaft 3 to drive subsequent equipment. In the present application, by setting an eccentric bearing seat 5, the position of the large pulley 31 can be adjusted simply by rotating the eccentric bearing seat 5, thereby changing the tension of the toothed belt 4. The tension adjustment can be achieved without complex tools or professional skills, thereby improving maintenance efficiency; the eccentric bearing seat 5 enables the toothed belt 4 to adapt to the tensioning requirements under different working conditions. The appropriate tension of the toothed belt can ensure the stability of power transmission, reduce the decrease in transmission efficiency and belt wear caused by loose or overtightened belts, and improve the adaptability of the equipment. By setting a flexible coupling spacer 213, the stress concentration and fatigue damage of the adapter plate 21 under extreme working conditions are reduced, and the service life of the adapter plate 21 and the entire reduction mechanism is extended.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A belt-driven speed reduction mechanism, comprising a speed reduction housing (1), a first transmission shaft (2) and a second transmission shaft (3) being arranged on the speed reduction housing (1), an adapter plate (21) being arranged on the first transmission shaft (2), a small pulley (22) being arranged on the first transmission shaft (2), a large pulley (31) being arranged on the second transmission shaft (3), the small pulley (22) and the large pulley (31) being connected via a toothed transmission belt (4), characterized in that: An eccentric bearing seat (5) is provided on the reduction gearbox body (1), and the second transmission shaft (3) is mounted on the eccentric bearing seat (5).

2. A belt-driven speed reduction mechanism according to claim 1, characterized in that: The transfer disk (21) comprises a transfer female disk (211) and a transfer male disk (212), and a flexible coupling spacer (213) is arranged between the transfer female disk (211) and the transfer male disk (212).

3. A belt-driven speed reduction mechanism according to claim 1, characterized in that: A deep groove ball bearing (23) is arranged on the first transmission shaft (2), and the deep groove ball bearing (23) is placed in a bearing sleeve (24). A seat bearing (25) is arranged at the end of the first transmission shaft (2), and the bearing sleeve (24) and the seat bearing (25) are both fixedly mounted on the reduction gearbox body (1).

4. A belt-driven speed reduction mechanism according to claim 1, characterized in that: Bearing end covers (51) are provided on both sides of the eccentric bearing seat (5), two double-row tapered roller bearings (52) are provided between the second transmission shaft (3) and the eccentric bearing seat (5), and a bearing inner spacer (53) is provided between the two double-row tapered roller bearings (52).

5. The belt-driven speed reduction mechanism according to claim 1, characterized in that: A propeller connecting piece (32) is provided at the end of the second transmission shaft (3), and a propeller (33) is provided on the propeller connecting piece (32).

6. A belt-driven speed reduction mechanism according to claim 5, characterized in that: The propeller connecting member (32) comprises a propeller seat (321), a propeller seat spacer (322), and a propeller hub positioning sleeve (323).

7. The belt-driven speed reduction mechanism according to claim 1, characterized in that: The reduction box (1) comprises a box front plate (11), a box rear plate (12), a box side plate (13), and a box top plate (14); the box front plate (11) and the box rear plate (12) are both provided with reinforcing ribs (15); the box front plate (11) is provided with an eccentric bearing seat mounting hole (16); and the box front plate (11) and the box rear plate (12) are symmetrically provided with a first transmission shaft mounting hole (17).

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