A ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines

Abstract

This utility model discloses a ten-slot U-shaped track clutch shifting mechanism suitable for inboard and outboard engines, relating to the technical field of shifting mechanisms. It includes a multi-groove ball screw, a conical copper clutch between the upper and lower driven gears, and multiple sets of steel balls filling the space between the conical copper clutch and the ball screw grooves. A shift fork is located on the right side of the conical copper clutch. This ten-slot U-shaped track clutch shifting mechanism for inboard and outboard engines, by configuring the conical copper clutch, ball nuts, steel balls, and ball screw grooves, allows the ball nuts and steel balls inside the conical copper clutch to slide on the multi-groove ball screw through the up-and-down switching of the shift fork. The conical copper clutch, in its up-and-down sliding motion, drives the upper and lower driven gears to rotate together due to friction, achieving the purpose of shifting gears. This mechanism prevents jamming and disengagement, solving the problem of jamming and disengagement that easily occur during gear shifting.

Description

Technical Field

[0001] This utility model relates to the field of shifting mechanism technology, specifically a ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines. Background Technology

[0002] Inboard and outboard engines, also known as shipboard engines, are marine engines that combine the advantages of inboard and outboard engines. They are mainly used in small and medium-sized boats and yachts.

[0003] Existing inboard and outboard engine shifting devices mostly employ gear direct meshing, hydraulic shifting, or electronically controlled shifting mechanisms, as well as integrated shifting mechanisms. These suffer from complex structures, significant shifting impact, and high maintenance costs. Traditional screw shifting devices are often single-track designs, prone to jamming and inaccurate positioning, and their reliability is insufficient, especially under ship vibration environments. Furthermore, domestically produced inboard and outboard engines use multi-start T-shaped threaded contact conical copper clutch shifting devices, which are prone to jamming and disengagement.

[0004] Now, a novel ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines is proposed to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines, in order to solve the problems of jamming and disengagement during shifting mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a ten-slot U-shaped track clutch shifting mechanism suitable for inboard and outboard engines, comprising a multi-slot ball screw, the top end of which is provided with a spline head; an upper driven gear is sleeved from bottom to top on the outer top end of the multi-slot ball screw; a first internal threaded connecting sleeve is fixedly connected to the bottom end of the upper driven gear; a lower driven gear is sleeved on the outer bottom end of the multi-slot ball screw; a second internal threaded connecting sleeve is fixedly connected to the top end of the lower driven gear; the upper driven gear, ... A conical copper clutch is provided between the driven gears. A ball nut is fixedly connected to the middle position inside the conical copper clutch. Four sets of reserved screw holes are opened at the upper and lower ends of the conical copper clutch. A lower baffle and an upper baffle are fixedly connected to the upper and lower ends of the conical copper clutch by bolts. Four sets of fixing screw holes are opened inside the lower baffle and the upper baffle. Ten sets of ball screw grooves are opened on the outside of the multi-groove ball screw. Multiple sets of steel balls are filled between the conical copper clutch and the ball screw grooves. A shift fork is provided on the right side of the conical copper clutch.

[0007] As a further technical solution of this utility model, tapered threads are machined at the upper and lower ends of the outer surface of the tapered copper clutch, and the threads on the outer surface of the tapered copper clutch match the threads inside the first internal thread connecting sleeve and the second internal thread connecting sleeve.

[0008] As a further technical solution of this utility model, the multi-groove ball screw penetrates the interior of the conical copper clutch, and the vertical center lines of the multi-groove ball screw, the upper driven gear, the lower driven gear, and the conical copper clutch coincide.

[0009] As a further technical solution of this utility model, the lower baffle and the upper baffle are the same size, the reserved screw holes and the fixed screw holes are in one-to-one correspondence in position and size, and the inner diameter of the lower baffle and the upper baffle are adapted to the outer diameter of the multi-groove ball screw.

[0010] As a further technical solution of this utility model, the internal threads of the ball nut and the ball grooves are adapted to each other, and the ten sets of ball grooves are evenly distributed in a 36° circumference with a tolerance of ±0.05°.

[0011] As a further technical solution of this utility model, the steel ball is a G20 grade silicon nitride ceramic steel ball with a diameter of 4mm.

[0012] As a further technical solution of this utility model, each of the ball screw grooves contains 16 steel balls, and the total number of steel balls is 160.

[0013] As a further technical solution of this utility model, an annular groove is provided at the middle position of the outer surface of the conical copper clutch, and the shape and size of the groove on the left side of the shift fork and the outer surface of the conical copper clutch are compatible.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the ten U-shaped track clutch shifting mechanism applicable to inboard and outboard engines achieves the function of preventing jamming and disengagement;

[0015] The clutch is equipped with a conical copper clutch, ball nuts, steel balls, and ball screw grooves. During operation, the conical copper clutch has ten U-shaped groove ball nuts inside, with 16 steel balls (4mm in diameter) placed in each groove. The conical copper clutch is locked in place by lower and upper baffles to prevent steel balls from leaking out. By shifting the clutch up and down, the steel balls in the ball nuts slide on the multi-groove ball screw. This up-and-down movement of the clutch drives the upper and lower driven gears to rotate together, achieving gear shifting. The ten ball screw grooves are evenly distributed at a 36° circumference, forming a full-circumferential force balance structure, increasing radial load dispersion by 90%. Experiments show that after 1000 cycles, steel ball wear is less than 1μm, and shifting impact is reduced by 80%, effectively preventing jamming and disengagement. Attached Figure Description

[0016] Figure 1 This is a front view structural diagram of the present utility model;

[0017] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0018] Figure 3 This is a top-view enlarged structural diagram of the conical copper clutch of this utility model;

[0019] Figure 4 This is a top-view enlarged structural diagram of the lower baffle of this utility model;

[0020] Figure 5 This is a top-view enlarged structural diagram of the shift fork of this utility model.

[0021] In the diagram: 1. Multi-groove ball screw; 2. Spline head; 3. Upper driven gear; 4. First internal thread connecting sleeve; 5. Lower driven gear; 6. Second internal thread connecting sleeve; 7. Conical copper clutch; 8. Ball nut; 9. Reserved screw hole; 10. Lower baffle; 11. Fixed screw hole; 12. Steel ball; 13. Upper baffle; 14. Ball screw groove; 15. Shift fork. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example: Please refer to Figure 1-5 A ten-track U-shaped track clutch shifting mechanism suitable for inboard and outboard motors includes a multi-groove ball screw 1, with a splined head 2 at the top. An upper driven gear 3 is sleeved from bottom to top on the outer top of the multi-groove ball screw 1. A first internal threaded connecting sleeve 4 is fixedly connected to the bottom of the upper driven gear 3. A lower driven gear 5 is sleeved on the outer bottom of the multi-groove ball screw 1. A second internal threaded connecting sleeve 6 is fixedly connected to the top of the lower driven gear 5. A conical copper clutch 7 is provided between the upper driven gear 3 and the lower driven gear 5. A ball nut 8 is fixedly connected at the middle position inside the conical copper clutch 7. Four sets of reserved screw holes 9 are opened at the upper and lower ends of the conical copper clutch 7. The lower baffle 10 and the upper baffle 13 are fixedly connected to the upper and lower ends of the conical copper clutch 7 by bolts. Four sets of fixing screw holes 11 are opened inside the lower baffle 10 and the upper baffle 13 respectively. Ten sets of ball screw grooves 14 are opened on the outside of the multi-groove ball screw 1. Multiple sets of steel balls 12 are filled between the conical copper clutch 7 and the ball screw grooves 14. A shift fork 15 is provided on the right side of the conical copper clutch 7.

[0024] The upper and lower ends of the conical copper clutch 7 are respectively machined with conical threads. The threads on the outside of the conical copper clutch 7 match the threads inside the first internal thread connecting sleeve 4 and the second internal thread connecting sleeve 6. The multi-groove ball screw 1 passes through the inside of the conical copper clutch 7. The vertical center lines of the multi-groove ball screw 1, the upper driven gear 3, the lower driven gear 5, and the conical copper clutch 7 coincide. The lower baffle 10 and the upper baffle 13 have the same size. The positions and dimensions of the reserved screw eye 9 and the fixed screw eye 11 correspond one-to-one. The inner diameter of the lower baffle 10 and the upper baffle 13 are adapted to the outer diameter of the multi-groove ball screw 1.

[0025] The internal threads of the ball nut 8 are compatible with the ball grooves 14. Ten sets of ball grooves 14 are evenly distributed in a 36° circle with a tolerance of ±0.05°. The steel balls 12 are G20 grade silicon nitride ceramic steel balls with a diameter of 4mm. Each ball groove 14 contains 16 steel balls 12, for a total of 160 steel balls 12. An annular groove is provided at the middle position of the outer surface of the conical copper clutch 7. The left side of the shift fork 15 is compatible with the shape and size of the groove on the outer surface of the conical copper clutch 7.

[0026] Specifically, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the ball bearing nut 8 and steel ball 12 inside the conical copper clutch 7, which is switched up and down by the shift fork 15, slide on the multi-groove ball screw 1. The conical copper clutch 7 drives the upper driven gear 3 and the lower driven gear 5 to rotate together in friction during the up and down sliding, so as to achieve the purpose of shifting gears: forward, neutral, and reverse. The 10 ball screw grooves 14 are evenly distributed in a 36° circle, forming a full circumferential force balance structure, which improves the radial load dispersion by 90%. The experiment shows that after 1000 cycles, the wear of the steel ball is <1μm as measured by white light interferometer, and the shifting impact is reduced by 80%.

[0027] Working Principle: In use, the conical copper clutch 7 is lined with ten U-shaped groove ball nuts 8. Each groove of the ball nut 8 contains 16 steel balls 12 with a diameter of 4mm. The conical copper clutch 7 is locked up and down by a lower baffle 10 and an upper baffle 13 to prevent the steel balls 12 from leaking out. By switching the fork 15 up and down, the steel balls 12 in the ball nuts 8 of the conical copper clutch 7 slide on the multi-groove ball screw 1. As the conical copper clutch 7 slides up and down, it drives the upper driven gear 3 and the lower driven gear 5 to rotate together, achieving the purpose of shifting gears: forward, neutral, and reverse. The 10 ball screw grooves 14 are evenly distributed in a 36° circle, forming a full circumferential force balance structure, which improves the radial load dispersion by 90%. Experiments show that after 1000 cycles, the wear of the steel balls is <1μm as measured by a white light interferometer, and the shifting impact is reduced by 80%.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines, comprising a multi-groove ball screw (1), characterized in that: The top end of the multi-groove ball screw (1) is provided with a spline head (2). An upper driven gear (3) is sleeved from bottom to top on the outer top end of the multi-groove ball screw (1). A first internal threaded connecting sleeve (4) is fixedly connected to the bottom end of the upper driven gear (3). A lower driven gear (5) is sleeved on the outer bottom end of the multi-groove ball screw (1). A second internal threaded connecting sleeve (6) is fixedly connected to the top end of the lower driven gear (5). A conical copper clutch (7) is provided between the upper driven gear (3) and the lower driven gear (5). A conical copper clutch (7) is fixedly connected at the middle position inside the conical copper clutch (7). There is a ball nut (8), and four sets of reserved screw holes (9) are opened at the upper and lower ends of the conical copper clutch (7). The upper and lower ends of the conical copper clutch (7) are fixedly connected to the lower baffle (10) and the upper baffle (13) by bolts. Four sets of fixed screw holes (11) are opened inside the lower baffle (10) and the upper baffle (13). Ten sets of ball screw grooves (14) are opened on the outside of the multi-groove ball screw (1). Multiple sets of steel balls (12) are filled between the conical copper clutch (7) and the ball screw grooves (14). A shift fork (15) is provided on the right side of the conical copper clutch (7).

2. The ten-U-shaped track clutch shifting mechanism applicable to inboard and outboard engines according to claim 1, characterized in that: The upper and lower ends of the conical copper clutch (7) are respectively machined with conical threads. The threads on the outside of the conical copper clutch (7) match the threads inside the first internal thread connecting sleeve (4) and the second internal thread connecting sleeve (6).

3. A ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines according to claim 1, characterized in that: The multi-groove ball screw (1) penetrates the interior of the conical copper clutch (7), and the vertical center lines of the multi-groove ball screw (1), the upper driven gear (3), the lower driven gear (5), and the conical copper clutch (7) coincide.

4. A ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines according to claim 1, characterized in that: The lower baffle (10) and the upper baffle (13) are the same size, the reserved screw hole (9) and the fixed screw hole (11) are in the same position and size, and the inner diameter of the lower baffle (10) and the upper baffle (13) are compatible with the outer diameter of the multi-groove ball screw (1).

5. A ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines according to claim 1, characterized in that: The internal threads of the ball nut (8) and the ball grooves (14) are adapted to each other. The ten sets of ball grooves (14) are evenly distributed in a 36° circumference with a tolerance of ±0.05°.

6. A ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines according to claim 1, characterized in that: The steel ball (12) is a G20 grade silicon nitride ceramic steel ball with a diameter of 4 mm.

7. A ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines according to claim 1, characterized in that: Each of the ball screw grooves (14) contains 16 steel balls (12), and there are a total of 160 steel balls (12).

8. A ten-U-shaped track clutch shifting mechanism suitable for inboard and outboard engines according to claim 1, characterized in that: An annular groove is provided at the middle position of the outer surface of the conical copper clutch (7), and the shape and size of the groove on the left side of the shift fork (15) and the outer surface of the conical copper clutch (7) are compatible.

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