Marine speed reducing mechanism

Abstract

The utility model relates to the technical field of speed reducers, in particular to a marine speed reduction mechanism which is provided with a speed reduction box body, an input shaft is arranged in the speed reduction box body, a small belt wheel is arranged on the input shaft, a large belt wheel is arranged above the small belt wheel, and the large belt wheel is rotatably installed on a large belt wheel supporting seat. A lifting sliding unit is arranged between the large belt wheel supporting seat and the reduction gearbox body and comprises a lifting sliding block fixedly installed on the large belt wheel supporting seat and a lifting adjusting groove formed in the reduction gearbox body, and the lifting sliding block is arranged in the lifting adjusting groove and can move up and down along the lifting adjusting groove. A threaded adjusting rod is arranged on the lifting sliding block, by arranging the lifting sliding unit, the lifting sliding block can move up and down in the lifting adjusting groove, the position of the large belt wheel can be easily adjusted by rotating the threaded adjusting rod, and therefore the distance between the small belt wheel and the large belt wheel is changed, the adjusting process is simplified, and accurate adjustment can be achieved by one person; and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of speed reducers, in particular to a marine speed reduction mechanism. Background Art

[0002] A reduction gear is a transmission device widely used in various mechanical equipment. Its primary function is to convert high-speed, low-torque input power into low-speed, high-torque output power to meet various operational requirements. A reduction gear typically consists of an input shaft, an output shaft, transmission elements such as gears or belts, and a housing. It achieves speed and torque conversion through varying transmission ratios.

[0003] In a reduction gear mechanism, adjusting the distance between the small and large pulleys is a critical step, directly affecting the tension of the transmission belt and transmission efficiency. Adjusting the distance between the small and large pulleys is often cumbersome. Some speed reducers use eccentric bearing seats to adjust the distance between the small and large pulleys. That is, the large pulley is mounted on the eccentric bearing seat, and the distance between the small and large pulleys is adjusted by rotating the eccentric bearing seat.

[0004] However, the adjustment method of the eccentric bearing seat requires first removing the bolts around the eccentric bearing seat, and then manually rotating the eccentric bearing seat to achieve the purpose of adjusting the distance. This operation is not only time-consuming and labor-intensive, but also requires the collaboration of multiple people, increasing the difficulty of the work and safety risks. Summary of the Invention

[0005] To solve the above problems, the present application provides a marine reduction mechanism, which is provided with a reduction gear box body, an input shaft being provided in the reduction gear box body, a small pulley being provided on the input shaft, a large pulley being provided above the small pulley, the small pulley and the large pulley being connected by a toothed transmission belt, the large pulley being rotatably mounted on the large pulley support seat, an output shaft being provided on one side of the large pulley, a lifting and sliding unit being provided between the large pulley support seat and the reduction gear box body, the lifting and sliding unit including a lifting and sliding block fixedly mounted on the large pulley support seat, a lifting and adjusting slot being provided on the reduction gear box body, the lifting and sliding block being placed in the lifting and adjusting slot and being able to move up and down along the lifting and adjusting slot, and a threaded adjusting rod being provided on the lifting and sliding block.

[0006] In one embodiment, the large pulley support seat includes a supporting transverse axis and a supporting side plate, the supporting transverse axis is fixedly connected to the supporting side plate, a locking hole is provided on the supporting side plate, and a locking groove is correspondingly provided on the reduction gear box body.

[0007] In one embodiment, the supporting side plate is located on a side away from the output shaft, and a double-row tapered roller bearing is provided between the supporting transverse shaft and the large pulley.

[0008] In one embodiment, a transfer unit is provided on the input shaft, and the transfer unit includes a transfer base, a transmission shaft rubber cake, and an input shaft transfer chassis. The input shaft transfer chassis is connected to the input shaft via a spline.

[0009] In one embodiment, a deep groove ball bearing is provided on the input shaft, the deep groove ball bearing is placed in a bearing sleeve, a seat bearing is provided at the end of the input shaft, and the bearing sleeve and the seat bearing are both fixedly mounted on the reduction gear box body.

[0010] In one embodiment, the reduction gear box includes a front plate and a rear plate, an output shaft mounting hole is provided on the rear plate, the lifting adjustment slot and the locking slot are located on the front plate of the box, the lifting adjustment slot, the locking slot and the output shaft mounting hole are all in the shape of long strips, and the center line of the long axis is vertical, which is convenient for moving up and down in the vertical direction.

[0011] In one embodiment, a propeller connecting piece is provided at the end of the output shaft.

[0012] In one embodiment, the transmission shaft rubber cake is made of soft rubber material.

[0013] The beneficial effects of the present invention are:

[0014] The present application discloses a marine reduction mechanism that adjusts the distance between a small pulley and a large pulley by providing a lifting sliding unit. That is, when the distance between the small pulley and the large pulley needs to be adjusted, rotating the threaded adjustment rod causes the lifting sliding block to move along the central axis of the threaded adjustment rod, thereby pushing or pulling the lifting sliding block to move up and down in the lifting adjustment slot. The movement of the lifting sliding block drives the large pulley support seat and the large pulley to move together, thereby changing the distance between the small pulley and the large pulley. By providing the lifting sliding unit, the lifting sliding block can be moved up and down in the lifting adjustment slot. The position of the large pulley can be easily adjusted by rotating the threaded adjustment rod, thereby changing the distance between the small pulley and the large pulley. This simplifies the adjustment process, allows one person to achieve precise adjustment, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0017] Figure 3 This is the front view of the utility model;

[0018] Figure 4 for Figure 3Middle AA section view;

[0019] Figure 5 Schematic diagram of the large pulley support structure Figure 1 ;

[0020] Figure 6 Schematic diagram of the large pulley support structure Figure 2 ;

[0021] Figure 7 This is a bottom view of the utility model;

[0022] Explanation of symbols in the figure:

[0023] 1. Gearbox; 11. Box front plate;

[0024] 12. Box rear panel; 121. Output shaft mounting hole;

[0025] 2. Input shaft;

[0026] 21. Adapter unit; 211. Adapter base; 212. Drive shaft rubber disc; 213. Input shaft adapter chassis;

[0027] 22. Deep groove ball bearings; 23. Pillow block bearings;

[0028] 3. Small pulley;

[0029] 4. Large pulley;

[0030] 5. Large pulley support seat; 51. Supporting horizontal axis; 52. Supporting side plate; 53. Locking hole; 54. Locking slot;

[0031] 6. Output shaft; 61. Propeller connector;

[0032] 7. Lifting and sliding unit; 71. Lifting and sliding block; 72. Lifting and adjusting slot; 73. Threaded adjusting rod;

[0033] 8. Double row tapered roller bearings. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0035] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. 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, "plurality" means two or more, unless otherwise specifically defined.

[0036] like Figure 1-4 As shown, a marine reduction mechanism is provided with a reduction box body 1, an input shaft 2 is provided in the reduction box body 1, a small pulley 3 is provided on the input shaft 2, a large pulley 4 is provided above the small pulley 3, the small pulley 3 and the large pulley 4 are connected by a toothed transmission belt, the large pulley 4 is rotatably mounted on the large pulley support seat 5, an output shaft 6 is provided on one side of the large pulley 4, a lifting sliding unit 7 is provided between the large pulley support seat 5 and the reduction box body 1, the lifting sliding unit 7 includes a lifting sliding block 71 fixedly mounted on the large pulley support seat 5, and a lifting adjustment slot 72 provided on the reduction box body 1, the lifting sliding block 71 is placed in the lifting adjustment slot 72 and can move up and down along the lifting adjustment slot 72, and a threaded adjustment rod 73 is provided on the lifting sliding block 71.

[0037] Specifically, a small pulley 3 is installed on the input shaft 2, and a large pulley 4 is connected to the small pulley 3 through a toothed belt (not shown in the figure) to realize the transmission of power. The large pulley 4 is installed on the large pulley support seat 5, and the output shaft 6 is connected to the large pulley 4 for outputting power. When the input shaft 2 rotates, the small pulley 3 rotates accordingly and drives the large pulley 4 to rotate through the toothed belt. In order to adjust the distance between the small pulley 3 and the large pulley 4, a lifting sliding unit 7 is provided. The lifting sliding unit 7 includes a lifting sliding block 71 fixedly mounted on the large pulley support seat 5, a lifting adjustment groove 72 provided on the reduction gear box body 1, and a threaded adjustment rod 73. The lifting sliding block 71 is placed in the lifting adjustment groove 72 and can move up and down along the trajectory of the lifting adjustment groove 72. When the distance between the small pulley 3 and the large pulley 4 needs to be adjusted, rotating the threaded adjustment rod 73 will cause the lifting slide block 71 to move along the central axis of the threaded adjustment rod 73, thereby pushing or pulling the lifting slide block 71 to move up and down in the lifting adjustment slot 72. The movement of the lifting slide block 71 drives the large pulley support seat 5 and the large pulley 4 to move together, thereby changing the distance between the small pulley 3 and the large pulley 4. By providing the lifting sliding unit 7, the lifting slide block 71 can be moved up and down in the lifting adjustment slot 72, and the position of the large pulley 4 can be easily adjusted by rotating the threaded adjustment rod 73, thereby changing the distance between the small pulley 3 and the large pulley 4, simplifying the adjustment process. One person can achieve precise adjustment, thereby improving work efficiency.

[0038] like Figure 3 、 5As shown in , 6 , the large pulley support seat 5 includes a supporting transverse axis 51 and a supporting side plate 52 , the supporting transverse axis 51 is fixedly connected to the supporting side plate 52 , a locking hole 53 is provided on the supporting side plate 52 , and a locking groove 54 is correspondingly provided on the reduction gear box body 1 .

[0039] Specifically, the support transverse axis 51, as the core component of the large pulley support seat 5, is fixedly connected to the support side plate 52, forming a stable support structure. This ensures the stability and reliability of the large pulley 4 during rotation and prevents deviation or shaking caused by vibration or external forces. The support side plate 52 is symmetrically provided with locking holes 53 centered on the support transverse axis 51, and the reduction gear box body 1 is correspondingly provided with a locking groove 54. When the distance between the small pulley 3 and the large pulley 4 is adjusted to the appropriate position, the bolt assembly can pass through the locking hole 53 and lock into the locking groove 54, thereby fixing the position of the large pulley support seat 5 and the large pulley 4.

[0040] like Figure 4 、 5 As shown, the supporting side plate 52 is located on the side away from the output shaft 6 , and a double-row tapered roller bearing 8 is provided between the supporting transverse shaft 51 and the large pulley 4 .

[0041] Specifically, positioning the support side plate 52 on a side away from the output shaft 6 ensures that the large pulley 4 does not interfere with the normal operation of the output shaft 6 during transmission. The double-row tapered roller bearing 8 can withstand large radial and axial loads. The support function of the support side plate 52 and the double-row tapered roller bearing 8 together improves the stability of the transmission system.

[0042] like Figure 4 、 7 As shown, a transfer unit 21 is provided on the input shaft 2. The transfer unit 21 includes a transfer base 211, a transmission shaft rubber cake 212, and an input shaft transfer chassis 213. The input shaft transfer chassis 213 is connected to the input shaft 2 via a spline.

[0043] Specifically, the adapter base 211, the drive shaft rubber cake 212, and the input shaft adapter chassis 213 are connected by a bolt assembly, and the input shaft adapter chassis 213 and the input shaft 2 are splined to achieve a reliable connection between the two shafts. The input shaft adapter chassis 213 can be firmly fixed on the input shaft 2 to ensure the stability and reliability of the adapter unit 21. The drive shaft rubber cake 212 is made of soft rubber material, so that the connection between the engine and the reduction gearbox input shaft 2 is a soft connection, which prevents components from breaking due to sudden stops and accelerations, processing, and installation errors.

[0044] like Figure 4As shown, a deep groove ball bearing 22 is provided on the input shaft 2, and the deep groove ball bearing 22 is placed in a bearing sleeve. A seat bearing 23 is provided at the end of the input shaft 2, and the bearing sleeve and the seat bearing 23 are both fixedly mounted on the reduction gearbox body 1.

[0045] Specifically, deep groove ball bearing 23 is mounted within the bearing sleeve and securely fastened to reduction gearbox body 1. During rotation of input shaft 2, deep groove ball bearing 23 supports both axial and radial loads, while allowing a certain amount of axial displacement of input shaft 2. Pillow block bearing 25 primarily bears radial loads, providing stable support for input shaft 2 at its end and helping to prevent bending or vibration. The combination of deep groove ball bearing 23 and pillow block bearing 25 provides solid support for input shaft 2, effectively reducing vibration and stress potentially caused by shaft misalignment or installation errors, thereby enhancing transmission stability.

[0046] like Figure 1 、 2 As shown in Figures 3 and 4, the reduction gear box body 1 includes a box front plate 11 and a box rear plate 12. The box rear plate 12 is provided with an output shaft mounting hole 121. The lifting adjustment groove 72 and the locking groove 54 are located on the box front plate 11. The lifting adjustment groove 72, the locking groove 54 and the output shaft mounting hole 121 are all in the shape of long strips, and the center line of the long axis is vertical, which is convenient for moving up and down in the vertical direction.

[0047] Specifically, the output shaft mounting hole 121 provided on the rear panel 12 of the box is specifically used for installing the output shaft. The lifting adjustment slot 72 and the locking slot 54 are both located on the front panel 11 of the box and are both in the shape of long strips with the center line of their long axes vertical, so that the lifting sliding block 71 and the output shaft 6 can move up and down in the vertical direction, making it easy to adjust the position and height of the transmission system.

[0048] like Figure 2 、 4 As shown, a propeller connecting member 61 is provided at the end of the output shaft 6.

[0049] Specifically, the propeller connector 61 includes a propeller seat, a propeller seat spacer, and a propeller hub positioning sleeve, and the propeller is fixed through the propeller connector 61. The power source drives the output shaft 6 to rotate, which is transmitted to the propeller through the propeller connector 61, driving the propeller to rotate and push the hull to move.

[0050] The present application is a marine reduction mechanism, which is provided with a reduction box body 1, an input shaft 2 is provided in the reduction box body 1, a small pulley 3 is provided on the input shaft 2, a large pulley 4 is provided above the small pulley 3, the large pulley 4 is rotatably mounted on the large pulley support seat 5, a lifting sliding unit 7 is provided between the large pulley support seat 5 and the reduction box body 1, the lifting sliding unit 7 includes a lifting sliding block 71 fixedly mounted on the large pulley support seat 5, a lifting adjustment slot 72 provided on the reduction box body 1, and the lifting sliding block 71 is placed in the lifting adjustment slot. The lifting slide block 71 is provided with a threaded adjustment rod 73 in the groove 72 and can move up and down along the lifting adjustment groove 72. When it is necessary to adjust the distance between the small pulley 3 and the large pulley 4, rotating the threaded adjustment rod 73 will cause the lifting slide block 71 to move along the central axis of the threaded adjustment rod 73, thereby pushing or pulling the lifting slide block 71 to move up and down in the lifting adjustment groove 72. The movement of the lifting slide block 71 drives the large pulley support seat 5 and the large pulley 4 to move together, thereby changing the distance between the small pulley 3 and the large pulley 4. By providing the lifting sliding unit 7, the lifting slide block 71 can be moved up and down in the lifting adjustment groove 72. The threaded adjustment rod 73 can be rotated to easily adjust the position of the large pulley 4, thereby changing the distance between the small pulley 3 and the large pulley 4. This simplifies the adjustment process, allows one person to achieve precise adjustment, and improves work efficiency.

[0051] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0052] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. A marine reduction mechanism, comprising a reduction box (1), an input shaft (2) being provided in the reduction box (1), a small pulley (3) being provided on the input shaft (2), a large pulley (4) being provided above the small pulley (3), the small pulley (3) and the large pulley (4) being connected via a toothed belt, the large pulley (4) being rotatably mounted on a large pulley support seat (5), and an output shaft (6) being provided on one side of the large pulley (4), characterized in that: A lifting sliding unit (7) is provided between the large pulley support seat (5) and the reduction gear box (1). The lifting sliding unit (7) comprises a lifting sliding block (71) fixedly mounted on the large pulley support seat (5) and a lifting adjustment groove (72) provided on the reduction gear box (1). The lifting sliding block (71) is placed in the lifting adjustment groove (72) and can move up and down along the lifting adjustment groove (72). A threaded adjustment rod (73) is provided on the lifting sliding block (71).

2. A marine speed reduction mechanism according to claim 1, characterized in that: The large pulley support seat (5) comprises a supporting transverse axis (51) and a supporting side plate (52), wherein the supporting transverse axis (51) is fixedly connected to the supporting side plate (52), a locking hole (53) is provided on the supporting side plate (52), and a locking groove (54) is correspondingly provided on the reduction gear box body (1).

3. A marine speed reduction mechanism according to claim 2, characterized in that: The supporting side plate (52) is located on a side away from the output shaft (6), and a double-row tapered roller bearing (8) is provided between the supporting transverse shaft (51) and the large pulley (4).

4. A marine speed reduction mechanism according to claim 1, characterized in that: The input shaft (2) is provided with an adapter unit (21), the adapter unit (21) comprising an adapter base (211), a transmission shaft rubber cake (212), and an input shaft adapter chassis (213), and the input shaft adapter chassis (213) is connected to the input shaft (2) via a spline.

5. A marine speed reduction mechanism according to claim 1, characterized in that: A deep groove ball bearing (22) is provided on the input shaft (2), and the deep groove ball bearing (22) is placed in a bearing sleeve. A seat bearing (23) is provided at the end of the input shaft (2), and the bearing sleeve and the seat bearing (23) are both fixedly mounted on the reduction gearbox body (1).

6. A marine speed reduction mechanism according to claim 2, characterized in that: The reduction gearbox (1) comprises a box front plate (11) and a box rear plate (12); an output shaft mounting hole (121) is provided on the box rear plate (12); the lifting adjustment slot (72) and the locking slot (54) are located on the box front plate (11); the lifting adjustment slot (72), the locking slot (54) and the output shaft mounting hole (121) are all in the shape of long strips, and the center line of the long axis is vertical, so as to facilitate upward and downward movement in the vertical direction.

7. A marine speed reduction mechanism according to claim 1, characterized in that: A propeller connecting piece (61) is provided at the end of the output shaft (6).

8. A marine speed reduction mechanism according to claim 4, characterized in that: The transmission shaft rubber cake (212) is made of soft rubber material.

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