Shifting fork mechanism of outboard engine and shifting assembly

Abstract

The utility model discloses an outboard engine gear shifting fork mechanism and a gear shifting assembly. The outboard engine shifting fork mechanism comprises a sleeve, a shifting fork arranged in a clamping groove of the sleeve and a limiting shaft with one end penetrating through the shifting fork, bosses connected with a forward gear or a backward gear in a matched mode are arranged on the two sides of the sleeve respectively, and a through hole allowing a power shaft to penetrate through is formed in the sleeve. The shifting fork can push the sleeve to move left and right; by arranging the limiting shaft, the shifting fork can move in the axial direction of the limiting shaft, the sliding stroke of the shifting fork is particularly increased, then the sleeve can be pushed by the shifting fork to move by a long stroke, and gear shifting is more obvious; meanwhile, the contact area between the bosses arranged on the side face of the sleeve and the forward gear or the backward gear is increased, power can be well transmitted to the forward gear or the backward gear through the bosses on the two sides of the sleeve, and power loss is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of ships, and particularly relates to an outboard motor shift fork mechanism and a shift assembly. Background Art

[0002] In current outboard motors, the drive shaft extends vertically and has a drive gear at its lower end, which is coupled to the propeller shaft via a push shaft in a clutch mechanism when gear shifting is required, that is, switching between forward gear, neutral gear, and reverse gear.

[0003] Currently, the gear shifting of outboard motors is achieved by transmitting the power of the external power device to the forward gear or reverse gear through a shift fork mechanism in the transmission case assembly. The forward gear or reverse gear engages with the gear on the propulsion shaft to achieve gear switching. However, the existing shift fork mechanism cannot effectively transmit power to the forward gear or reverse gear due to its short stroke, resulting in power loss. Utility Model Content

[0004] In view of this, the purpose of the present invention is to provide an outboard motor shift fork mechanism and a shift assembly, aiming to solve the technical problem of power loss caused by the short stroke of the existing outboard motor shift fork mechanism.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an outboard motor shift fork mechanism, comprising:

[0006] A sleeve, wherein the sleeve is provided with a through hole for the power shaft to pass through;

[0007] a shift fork, disposed in the slot of the sleeve, for pushing the sleeve to move left and right, and;

[0008] A limiting shaft, one end of which passes through the shift fork and is used to limit the sliding stroke of the shift fork;

[0009] Bosses are respectively provided on both sides of the sleeve and are connected to the forward gear or the reverse gear.

[0010] Furthermore, it also includes a handle for connecting with the shift fork.

[0011] Furthermore, the shift fork is provided with a slider, and the handle is mounted on the slider.

[0012] Furthermore, the slider and the shift fork are integrally formed.

[0013] Furthermore, the slider is provided with a receiving groove for receiving the handle.

[0014] Furthermore, the number of the bosses is three, and the three bosses are distributed at intervals along the circumferential direction of the sleeve.

[0015] Furthermore, the height of the boss is gradually reduced along the rotation direction of the sleeve.

[0016] The present application also provides a gear shift assembly, comprising:

[0017] case;

[0018] A power shaft is rotatably mounted in the housing and is used for transmission connection with an external power device;

[0019] A forward gear and a reverse gear are sleeved on the power shaft at intervals, and the power shaft rotates relative to the forward gear and the reverse gear;

[0020] A driving shaft is rotatably mounted on the housing and arranged parallel to the power shaft, and is used for transmission connection with the flexible shaft propeller;

[0021] A first gear and a second gear are sleeved on the driving shaft at intervals, the forward gear is meshed with the first gear, and the reverse gear is connected to the second gear via a chain transmission; and;

[0022] a shift fork mechanism, slidably mounted on the power shaft and distributed between the forward gear and the reverse gear, for connecting the power shaft to the forward gear or the reverse gear in transmission;

[0023] The shift fork mechanism is the shift fork mechanism described above.

[0024] Furthermore, the power shaft is provided with a spline, and the sleeve is provided with a spline groove that cooperates with the spline.

[0025] The beneficial effects of the present invention are as follows: compared with the prior art, the outboard motor shift fork mechanism of the present invention has a through hole provided in the sleeve so that the power shaft can pass through it, so that the power shaft can drive the sleeve to rotate synchronously; the sleeve can be pushed to move by the shift fork; and a limit shaft is provided so that the shift fork can be allowed to move axially along the limit shaft, especially increasing the sliding stroke of the shift fork, and then the sleeve can be pushed to move a longer stroke by the shift fork, making the shifting more obvious, increasing the contact area between the boss provided on the side of the sleeve and the forward gear or the reverse gear, and can better transmit power to the forward gear or the reverse gear through the bosses on both sides of the sleeve, thereby reducing power loss.

[0026] Other advantages, objectives, and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or they may be taught by those skilled in the art from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention is described with the following drawings:

[0028] Figure 1 This is a schematic diagram of the outboard motor shift assembly structure proposed in one embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the internal structure of an outboard motor shift assembly proposed in one embodiment of the present utility model;

[0030] Figure 3 This is a schematic structural diagram of a shift fork mechanism and a forward gear or a reverse gear proposed in one embodiment of the present utility model;

[0031] Figure 4 This is a structural schematic diagram of a shift fork mechanism proposed in one embodiment of the present utility model.

[0032] Figure Number:

[0033] 1- shell;

[0034] 2-power shaft;

[0035] 3- forward gear; 31- first jack;

[0036] 4-reverse gear; 41-second socket;

[0037] 5- driving shaft;

[0038] 6-First gear;

[0039] 7- Second gear;

[0040] 8-chain;

[0041] 9-shift fork mechanism; 91-sleeve; 911-sleeve body; 912-boss; 913-slot; 914-through hole; 92-shift fork; 93-limiting shaft; 94-handle; 95-slider; 950-accommodation groove; 96-spline groove. DETAILED DESCRIPTION

[0042] like Figures 2 to 4As shown, this embodiment proposes an outboard motor shift fork mechanism, the shift fork mechanism 9 includes a sleeve 91, a shift fork 92, and a limit shaft 93. The sleeve 91 is provided with a through hole 914, the through hole 914 can allow the power shaft 2 to pass through, and bosses 912 are respectively provided on both sides of the sleeve 91. The sleeve 91 can be connected to the forward gear 3 or the reverse gear 4 through the bosses 912 to achieve power transmission. The shift fork 92 is provided on the sleeve 91. A gap exists in the slot, that is, between the outer walls of the shift fork 92 and the sleeve 91. This ensures that the sleeve 91 can rotate with the power shaft 2, while the shift fork 92 does not rotate synchronously with the sleeve 91. When shifting gears, the shift fork 92 pushes the sleeve 91 left and right, causing the boss 912 to engage with the forward gear 3 or the reverse gear 4. One end of the limit shaft 93 passes through the shift fork 92, and the limit shaft 93 limits the sliding stroke of the shift fork 92. The provision of the limit shaft 93 allows the shift fork 92 to move axially along the limit shaft 93, particularly increasing the sliding stroke of the shift fork 92. The shift fork 92 can then push the sleeve 91 for a longer stroke, making shifting more efficient. It also increases the contact area between the boss 912 provided on the side of the sleeve 91 and the forward gear 3 or the reverse gear 4, effectively transmitting power to the forward gear 3 or the reverse gear 4 through the bosses 912 on both sides of the sleeve 91, thereby reducing power loss.

[0043] In the present application, the shifting mode includes forward, neutral, and reverse modes. The forward and reverse modes are driving modes, and the neutral mode is a non-driving mode. When the sleeve is in the middle position between the forward gear 3 and the reverse gear 4, that is, in the initial state, it is in neutral mode. Only the power shaft 2 rotates, and neither the forward gear 3 nor the reverse gear 4 rotates. When gear switching is required, that is, when the shift fork 92 pushes the sleeve 91 to slide toward the forward gear 3, when the sleeve 91 slides to the appropriate position, the power shaft 2 is connected to the forward gear 3, and then the power shaft 2 can drive the forward gear 3 to rotate, realizing the switching of the forward gear; when the shift fork 92 pushes the sleeve 91 to slide toward the reverse gear 7, when the sleeve 91 slides to the appropriate position, the power shaft 2 is connected to the reverse gear 4, and then the power shaft 2 can drive the reverse gear 4 to rotate, realizing the switching of the reverse gear.

[0044] Further, see Figure 4As shown, the sleeve 91 includes a sleeve body 911, with the boss 912 provided on one side of the sleeve body 911. The forward gear 3 is provided with a first insertion hole 31, and the reverse gear 4 is provided with a second insertion hole 41. The first insertion hole 31 and the second insertion hole 41 are respectively adapted to receive the boss 912. The through hole 914 is provided on the sleeve body 911. Thus, when the sleeve body 911 is moved such that the boss 912 is fully inserted into the first insertion hole 31 or the boss 912 is fully inserted into the second insertion hole 41, a transmission connection between the sleeve 91 and the forward gear 3 or the reverse gear 4 is achieved, thereby realizing gear shifting.

[0045] In the present application, by setting a limit shaft 93, the shift fork 92 can slide axially along the limit shaft 93, thereby increasing the sliding stroke of the shift fork 92, so that the shift fork 92 can push the sleeve 91 to completely insert the boss 912 into the first hole 31 or the second hole 41, thereby realizing power transmission and completing gear switching, avoiding the situation where the boss 912 is not inserted or the area inserted into the first hole 31 or the second hole 41 is small, which affects the transmission of power efficiency and greatly reduces the occurrence of power loss.

[0046] Further, see Figure 4 As shown, the shift fork mechanism 9 further includes a handle 94. Thus, when it is necessary to switch gears, the handle 94 is rotated, and the handle 94 drives the shift fork 92 to move, and the shift fork 92 in turn drives the sleeve 91 to move toward the forward gear 3 or the reverse gear 4. When the sleeve 91 moves to the appropriate position, it is connected to the forward gear 3 or the reverse gear 4, thereby achieving the gear switch.

[0047] Further, see Figure 4 As shown, the shift fork 92 is provided with a slider 95, and the handle 94 is mounted on the slider 95. The provision of the slider 95 increases the contact area between the handle 94 and the shift fork 92, making it easier to push the shift fork 92 with the handle 94. Preferably, the shift fork 92 and the slider 95 are integrally formed. This integral molding reduces subsequent machining and reduces production and processing costs.

[0048] Preferably, see Figure 4 As shown, the slider 95 is provided with a receiving groove 950 , which, on the one hand, allows the handle 94 and the slider 95 to be better connected, and on the other hand, makes the overall structure more compact, reducing the space occupied by each structure.

[0049] Preferably, see Figure 4As shown, there are three bosses 912, spaced apart along the circumference of the sleeve 91. Thus, the three bosses 912 provide a better connection between the sleeve 91 and the forward gear 3 or the reverse gear 4. Of course, in this embodiment, the number of bosses 912 may be four, six, or the like, depending on actual conditions and specific needs, and this is not a limit.

[0050] Further, see Figure 4 As shown, the height of the boss 912 is tapered along the rotation direction of the sleeve 91. In this way, the boss 912 is tapered to form a guide structure, which facilitates the boss 912 to be inserted into the first insertion hole 31 or the second insertion hole 41.

[0051] See also Figures 1 to 3 As shown, the present application also provides a shift assembly, including a housing 1, a power shaft 2, a forward gear 3 and a reverse gear 4, and a driving shaft 5. The power shaft 2 is rotatably mounted in the housing 1, and the power shaft 2 is transmission-connected to an external power device. Power can be transmitted to the power shaft 2 through the external power device. The forward gear 3 and the reverse gear 4 are spaced apart and sleeved on the power shaft 2. The power shaft 2 can rotate relative to the forward gear 3 and the reverse gear 4. The driving shaft 5 is rotatably mounted on the housing 1 and is arranged parallel to the power shaft 2. The propulsion shaft 5 is connected to the soft shaft propeller in a transmission manner. In addition, the propulsion shaft 5 is also provided with a first gear 6 and a second gear 7. The first gear 6 and the second gear 7 are distributed at intervals. The forward gear 3 is engaged with the first gear 6, and the reverse gear 4 is connected to the second gear 7 through a chain 8. In addition, a shift fork mechanism 9 is provided between the forward gear 3 and the reverse gear 4. The shift fork mechanism 9 can be slidably installed on the power shaft 2. The shift fork mechanism 9 can make the power shaft 2 connected to the forward gear 3 or the reverse gear 4 in a transmission manner. In this way, by arranging a power shaft 2 and a driving shaft 5 in the housing 1, a forward gear 3 and a reverse gear 4 are provided on the power shaft 2, a first gear 6 and a second gear 7 are provided on the driving shaft 5, and the forward gear 3 is meshed with the first gear 6, and the reverse gear 4 is connected to the second gear 7 through a chain 8, so that the power shaft 2 can be connected to the forward gear 3 or the reverse gear 4 by sliding the shift fork mechanism 9 along the power shaft 2 to realize gear switching. By adopting the chain 8 transmission connection, one level of gear transmission can be reduced, forward and reverse movement can be realized, the structure is simplified, and the assembly is exquisite and compact.

[0052] Preferably, see Figure 4As shown, the power shaft 2 is provided with a spline, and the sleeve 91 is provided with a spline groove 96 that cooperates with the spline. The spline 96 is connected to the spline groove, on the one hand, the sleeve 91 can be connected to the power shaft 2 by transmission, and on the other hand, the sleeve 91 can slide along the spline to achieve transmission connection between the sleeve 91 and the forward gear 3 or the reverse gear 4, thereby achieving gear switching.

[0053] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. An outboard motor shift fork mechanism, characterized in that: include: A sleeve, wherein the sleeve is provided with a through hole for the power shaft to pass through; a shift fork, disposed in the slot of the sleeve, for pushing the sleeve to move left and right, and; A limiting shaft, one end of which passes through the shift fork and is used to limit the sliding stroke of the shift fork; Bosses are respectively provided on both sides of the sleeve and are connected to the forward gear or the reverse gear.

2. The outboard motor shift fork mechanism according to claim 1, characterized in that: Also included is a handle for connecting with the shift fork.

3. The outboard motor shift fork mechanism according to claim 2, characterized in that: The shift fork is provided with a slider, and the handle is mounted on the slider.

4. The outboard motor shift fork mechanism according to claim 3, characterized in that: The slider and the shift fork are integrally formed.

5. The outboard motor shift fork mechanism according to claim 3, characterized in that: The sliding block is provided with a receiving groove for receiving the handle.

6. The outboard motor shift fork mechanism according to claim 1, characterized in that: The number of the bosses is three, and the three bosses are distributed at intervals along the circumferential direction of the sleeve.

7. The outboard motor shift fork mechanism according to claim 6, characterized in that: The height of the boss is gradually reduced along the rotation direction of the sleeve.

8. A gear shift assembly, characterized in that: include: case; A power shaft is rotatably mounted in the housing and is used for transmission connection with an external power device; A forward gear and a reverse gear are sleeved on the power shaft at intervals, and the power shaft rotates relative to the forward gear and the reverse gear; A driving shaft is rotatably mounted on the housing and arranged parallel to the power shaft, and is used for transmission connection with the flexible shaft propeller; A first gear and a second gear are sleeved on the propulsion shaft at intervals, the forward gear is meshed with the first gear, and the reverse gear is connected to the second gear via a chain transmission; and a shift fork mechanism is slidably mounted on the power shaft and distributed between the forward gear and the reverse gear, for connecting the power shaft to the forward gear or the reverse gear; The shift fork mechanism is the shift fork mechanism according to any one of claims 1 to 7.

9. The shift assembly according to claim 8, characterized in that: The power shaft is provided with a spline, and the sleeve is provided with a spline groove that is matched with the spline.

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