A remote gear shift mechanism for outboard motors used in laboratories

Abstract

The invention discloses a remote gear shift mechanism for an outboard motor for a laboratory, comprising an electric control mechanism, a sliding mechanism controlled by the electric control mechanism and a connecting rod mechanism slidably arranged on the sliding mechanism, wherein the electric control mechanism comprises an electric control box and a signal harness; the sliding mechanism comprises a cylinder, a guide rail and a base plate, wherein the input end of the cylinder is connected to the signal harness, the output shaft is fixedly connected to the guide rail flange, the extended end of the guide rail flange is connected to the internal thread of the guide rail, the guide rail is slidably arranged on the base plate, and the base plate is fixedly connected to a test bench; the connecting rod mechanism comprises a first connecting rod and a second connecting rod, wherein one end of the first connecting rod is vertically fixedly arranged on one end of the second connecting rod horizontally movably connected to the other end of the guide rail end, and the other end of the second connecting rod is movably connected to a shift lever, and the invention controls the sliding mechanism to move forward or backward horizontally through the electric control mechanism, thereby driving the connecting rod mechanism to move to complete the gear shift operation, and the operation is simple and the safety performance is high.

Description

Technical Field

[0001] The invention relates to the field of outboard motors, in particular to a remote gear shifting mechanism for an outboard motor used in a laboratory. Background Art

[0002] An outboard motor is a propulsion engine installed on the outside of the hull (side of the ship). According to the different energy sources, it is divided into fuel type and electric outboard motor. The main performance indicator of the outboard motor is the propulsion characteristic indicator, and the performance of the outboard motor needs to be evaluated in the form of an outboard motor assembly (single engine and fully assembled lower part), and the output power, speed, torque and other parameter indicators of the propeller shaft are evaluated. During the bench test, it is necessary to switch between forward gear, neutral gear and reverse gear. Since the outboard motor and its test equipment are in the test room, and the control panel and control equipment are in the operation room, it is necessary to enter the test room for each gear shift operation. Considering safety factors and ease of operation, gear shifting needs to be performed after stopping the engine in each test. After the gear shift is completed, start the engine again for testing.

[0003] When the outboard motor was tested on the bench, the manual shift lever was not installed. After each shift, the shift lever was fixed with wire in the test room. With this connection method, the machine needs to be stopped and the shift operation needs to be carried out in the test room. In addition, the wire fixation has the risk of failure, resulting in an unlimited gear state. Under high speed and high load, it is easy to cause damage to the reversing gear of the lower transmission box. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a remote gear shifting mechanism for an outboard motor for a laboratory, which solves the problem that the gear shifting cannot be remotely controlled when the outboard motor is undergoing a bench test, and eliminates the risk of wire failure that is a defect of the prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a remote shift mechanism for an outboard motor for a laboratory, comprising an electric control mechanism, a sliding mechanism controlled by the electric control mechanism and a connecting rod mechanism slidably arranged on the sliding mechanism, the electric control mechanism comprising an electric control box and a signal wiring harness, the electric control box is provided with a neutral switch, a forward switch and a reverse switch; the sliding mechanism comprises a cylinder, a guide rail and a base plate, the input end of the cylinder is connected to the signal wiring harness, the output shaft is fixedly connected to the guide rail flange, the extended end of the guide rail flange is connected to the internal thread of the guide rail, the guide rail is slidably arranged on the base plate, and the base plate is fixedly connected to the test bench; the connecting rod mechanism comprises a first connecting rod and a second connecting rod, one end of the first connecting rod is vertically fixedly arranged on the end of the guide rail and the other end is horizontally movably connected to one end of the second connecting rod, and the other end of the second connecting rod is movably connected to the shift rod.

[0006] A further improvement of the technical solution of the present invention is that the output shaft of the cylinder is fixedly connected to the guide rail flange via a connecting flange.

[0007] A further improvement of the technical solution of the present invention is that the first connecting rod and the second connecting rod are movably connected via a cylindrical pin, and the second connecting rod and the shift lever are connected via a cylindrical pin.

[0008] A further improvement of the technical solution of the present invention is that the specific calculation method of the forward travel l1 of the shift lever is as follows:

[0009]

[0010]

[0011]

[0012] The specific calculation method of the reverse travel l2 of the shift lever (10) is as follows:

[0013]

[0014]

[0015] l2=b+a2sinγ-b2cosα,

[0016] Among them, the lengths of the shift rod 10, the second connecting rod 9, the first connecting rod 8 and the guide rail 6 in neutral are represented by a, b, c and d respectively; the lengths of the shift rod 10, the second connecting rod 9, the first connecting rod 8 and the guide rail 6 in forward motion are represented by a1, b1, c1 and d1 respectively; the lengths of the shift rod 10, the second connecting rod 9, the first connecting rod 8 and the guide rail 6 in reverse motion are represented by a2, b2, c2 and d2 respectively, a=a1=a2, b=b1=b2, c=c1=c2, d=d1=d2, φ is a known value, φ represents the angle between the shift rod 10 in forward motion and in neutral motion, β represents the angle between the second connecting rod 9 and the horizontal line in forward motion, γ is a known value, γ represents the angle between the shift rod 10 in reverse motion and in neutral motion, α represents the angle between the second connecting rod 9 and the horizontal line in reverse motion.

[0017] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is:

[0018] 1. The present invention controls the sliding mechanism to move forward or backward horizontally through the electric control mechanism, thereby driving the connecting rod mechanism to move to complete the gear shifting operation. The operation is relatively simple, and the operator does not need to enter the test room to operate each time the gear shifting operation is performed, and the safety performance is high.

[0019] 2. The structure of the present invention is stable, and the shift lever will be limited and fixed after each gear shift, eliminating the risk of failure of the limit function in the original gear shift technology.

[0020] 3. The present invention is not limited to the remote control shifting of outboard motor bench tests, but can also be applied to the remote control shifting technology of other multi-speed rotary gear levers. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional stereogram of the present invention;

[0022] Figure 2 It is the front view of the present invention;

[0023] Figure 3 is a top view of the present invention;

[0024] Figure 4 It is a schematic diagram of the position structure of the present invention in the forward gear state;

[0025] Figure 5 It is a schematic diagram of the position structure of the present invention in a neutral state;

[0026] Figure 6 It is a schematic diagram of the position structure of the present invention in the reverse gear state;

[0027] Figure 7 is a schematic diagram of calculating the forward travel of the shift lever according to the present invention;

[0028] Figure 8 is a schematic diagram of calculating the reverse travel of the shift lever according to the present invention;

[0029] Among them, 1. electric control box, 2. signal wiring harness, 3. cylinder, 4. connecting flange, 5. guide rail flange, 6. guide rail, 7. base plate, 8. first connecting rod, 9. second connecting rod, 10. shift lever. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with embodiments:

[0031] like Figures 1 to 3As shown, a remote gear shift mechanism for an outboard motor for a laboratory includes an electric control mechanism, a sliding mechanism controlled by the electric control mechanism, and a connecting rod mechanism slidably arranged on the sliding mechanism, wherein the electric control mechanism includes an electric control box 1 and a signal harness 2, and the electric control box 1 is provided with a neutral switch, a forward switch, and a reverse switch; the sliding mechanism includes a cylinder 3, a guide rail 6, and a base plate 7, wherein the input end of the cylinder 3 is connected to the signal harness 2, and the output shaft is fixedly connected to the guide rail flange 5 through a connecting flange 4, and the extended end of the guide rail flange 5 is connected to the internal thread of the guide rail 6, and the guide rail 6 is slidably arranged on the base plate 7, and the base plate 7 is selected to be connected with a bracket according to the fixed position or directly connected to the test bench through bolts, and the position of the threaded hole on the base plate 7 can be determined according to the on-site installation position; the connecting rod mechanism includes a first connecting rod 8 and a second connecting rod 9, wherein one end of the first connecting rod 8 is vertically fixedly arranged at the end of the guide rail 6, and the other end 9 is horizontally movably connected to one end of the second connecting rod 9 through a cylindrical pin, and the other end of the second connecting rod 9 is movably connected to a shift rod 10 through a cylindrical pin.

[0032] like Figures 7 and 8 As shown, first, when the shift lever 10 needs to perform a shift operation, the forward or reverse stroke of the shift lever 10 is known. The forward and reverse strokes of the guide rail 6 when the shift lever 10 is in the shift operation are determined by calculation. The lengths of the shift lever 10, the second connecting rod 9, the first connecting rod 8, and the guide rail 6 in neutral are represented by a, b, c, and d, respectively. The lengths of the shift lever 10, the second connecting rod 9, the first connecting rod 8, and the guide rail 6 in forward gear are represented by a1, b1, c1, and d1, respectively. The lengths of the shift lever 10, the second connecting rod 9, the first connecting rod 8, and the guide rail 6 in reverse gear are represented by a1, b1, c1, and d1, respectively. The lengths of the first connecting rod 8 and the guide rail 6 are represented by a2, b2, c2, and d2, respectively. Since the lengths of the rods remain unchanged during the gear shifting process, i.e., a=a1=a2, b=b1=b2, c=c1=c2, d=d1=d2, the shift rod 10 only rotates in the horizontal direction, and the position of the neutral axis remains unchanged. The second connecting rod 9 rotates relative to the first connecting rod 8 and the shift rod 10 with the movement of the entire mechanism. The first connecting rod 8 and the guide rail 6 only move horizontally. The specific calculation method of the forward stroke l1 is as follows:

[0033]

[0034]

[0035]

[0036] Wherein, φ is a known value, φ represents the angle between the shift lever 10 when it is moving forward and when it is in neutral, and β represents the angle between the second connecting rod 9 and the horizontal line when it is moving forward;

[0037] The specific calculation method of the reverse stroke l2 is as follows:

[0038]

[0039]

[0040] l2=b+a2sinγ-b2cosα,

[0041] Wherein, γ is a known value, γ represents the angle between the shift lever 10 when it is in reverse and when it is in neutral, and α represents the angle between the second connecting rod 9 and the horizontal line when it is in reverse;

[0042] The control program of the travel of the guide rail 6 is written into the electric control box 1. When the cylinder 3 drives the guide rail 6 to slide, the gear shifting operation can be performed and the gear position can be limited after the gear shifting. Specific implementation method:

[0044] like Figure 5 As shown, after the outboard motor bench test begins, the outboard motor is in a neutral state, and the cylinder 3 and the guide rail 6 are in a neutral position state, as shown in FIG. Figure 4 and Figure 6 As shown, during the test, when the gear shifting performance test is required, the test personnel do not need to enter the test room for operation and do not need to stop the machine. They only need to press the switch of the electric control box 1 to change the forward gear or reverse gear in the operation room. The cylinder 3 will move according to the preset stroke position according to the control program of the guide rail 6 stroke in the electric control box 1. The cylinder 3 drives the guide rail 6 to move, and then drives the first connecting rod 8 to move forward or backward. The first connecting rod 8 drives the second connecting rod 9 to move, and the second connecting rod 9 then drives the shift lever 10 to complete the gear shifting operation. After the gear shifting is completed, the whole mechanism is relatively stable, which also plays a limiting role on the current gear position.

[0045] When the outboard motor is in a geared running state and needs to be shifted to neutral, the tester presses the neutral switch of the electronic control box 1 in the operating room, and the cylinder 3 will move according to the preset stroke position based on the control program of the guide rail 6 stroke in the electronic control box 1. The cylinder 3 drives the guide rail 6 to move, and then drives the first connecting rod 8 to move forward or backward. The first connecting rod 8 drives the second connecting rod 9 to move, and the second connecting rod 9 then drives the shift lever 10 to complete the shifting operation, so that the outboard motor is in a neutral running state and limits the current gear position.

[0046] The present invention controls the sliding mechanism to move forward or backward horizontally through an electric control mechanism, thereby driving the connecting rod mechanism to move to complete the gear shifting operation. The operation is relatively simple, and the operator does not need to enter the test room to operate each time the gear shifting operation is performed. The safety performance is high. After each gear shifting, the shift lever will be limited and fixed, eliminating the risk of failure of the limit function in the original gear shifting technology. The present invention is not limited to the remote control shifting of the outboard motor bench test, and can also be applied to other remote control shifting technologies of multi-speed rotary gear levers.

Claims

1. A remote gear shift mechanism for an outboard motor for use in a laboratory, characterized in that: The invention comprises an electric control mechanism, a sliding mechanism controlled by the electric control mechanism and a connecting rod mechanism slidably arranged on the sliding mechanism, wherein the electric control mechanism comprises an electric control box (1) and a signal harness (2), and the electric control box (1) is provided with a neutral switch, a forward switch and a reverse switch; the sliding mechanism comprises a cylinder (3), a guide rail (6) and a base plate (7), wherein the input end of the cylinder (3) is connected to the signal harness (2), and the output shaft is fixedly connected to the guide rail flange (5), the extended end of the guide rail flange (5) is connected to the internal thread of the guide rail (6), the guide rail (6) is slidably arranged on the base plate (7), and the base plate (7) is fixedly connected to the test bench; the connecting rod mechanism comprises a first connecting rod (8) and a second connecting rod (9), wherein one end of the first connecting rod (8) is vertically fixedly arranged on one end of the second connecting rod (9) to which the other end is horizontally movably connected, and the other end of the second connecting rod (9) is movably connected to a shift rod (10), and the specific calculation method of the forward stroke l1 of the shift rod (10) is as follows: The specific calculation method of the reverse travel l2 of the shift lever (10) is as follows: l2=b+a2sinγ-b2cosα, The lengths of the shift rod (10), the second connecting rod (9), the first connecting rod (8) and the guide rail (6) in neutral are represented by a, b, c and d respectively; the lengths of the shift rod (10), the second connecting rod (9), the first connecting rod (8) and the guide rail (6) in forward motion are represented by a1, b1, c1 and d1 respectively; the lengths of the shift rod (10), the second connecting rod (9), the first connecting rod (8) and the guide rail (6) in reverse motion are represented by a2, b2, c2 and d2 respectively. It indicates that a=a1=a2, b=b1=b2, c=c1=c2, d=d1=d2, φ is a known value, φ represents the angle between the shift lever (10) when it is moving forward and when it is in neutral, β represents the angle between the second connecting rod (9) and the horizontal line when it is moving forward, γ is a known value, γ represents the angle between the shift lever (10) when it is moving backward and when it is in neutral, and α represents the angle between the second connecting rod (9) and the horizontal line when it is moving backward.

2. The remote gear shift mechanism for an outboard motor for a laboratory according to claim 1, characterized in that: The output shaft of the cylinder (3) is fixedly connected to the guide rail flange (5) via a connecting flange (4).

3. The remote gear shift mechanism for an outboard motor for a laboratory according to claim 1, characterized in that: The first connecting rod (8) and the second connecting rod (9) are movably connected via a cylindrical pin, and the second connecting rod (9) and the shift rod (10) are connected via a cylindrical pin.

Images