Retractable handle of marine propeller

Abstract

The present invention relates to a telescopic handle for a marine propeller, which comprises a handle rod and a handle tube sleeved on the handle rod and capable of axially moving relative to the handle rod. It is characterized in that a through hole extending axially is formed on the handle rod, and a rotating rod rotatably installed inside the handle tube and capable of extending into the through hole and axially moving together with the handle tube is provided. At least one section of a smooth outer arc surface with a gradually increasing circumferential radius is provided on the outer wall surface of the rotating rod, and at least one section of a smooth inner arc surface with a gradually increasing circumferential radius is provided on the inner wall surface of the through hole. When the rotating rod rotates in the through hole until the outer arc surface corresponds to the inner arc surface, the rotating rod is in clearance fit with the through hole; when the rotating rod rotates in the through hole until the outer arc surface is misaligned with the inner arc surface, the rotating rod is in interference fit with the through hole and is in a locked state. With the above structure, the handle tube can be reliably positioned at any position in the required state at any time, and stepless adjustment of the telescopic length of the handle can be achieved, and the positioning is more reliable.

Description

Technical Field

[0001] The present invention relates to a telescopic handle, specifically a telescopic handle mainly used on a marine propeller. Background Art

[0002] A propeller is a power device used to help a hull move forward. The forward, backward or turning of the hull depends on the handle (also called the handle assembly) on the propeller for operation. And for easy operation, the handle is often designed in a telescopic structure, which includes a handle rod (also called a fixed rod) and a handle tube (also called a moving rod). The handle tube can axially move relative to the handle rod, so as to achieve the purpose of being convenient for storage and use. For example, the patent document with the Chinese patent application publication number CN103921926A discloses such a structure. Moreover, in order to enable the handle tube to be positioned relative to the handle rod during the telescopic process, positioning grooves are provided at intervals along the axis on one of the relative contact surfaces between the handle tube and the handle rod, and a radial groove is formed on the other contact surface. A ball head pin and a spring are installed in the radial groove. One end of the spring abuts against the bottom of the radial groove, and the other end abuts against the ball head pin, so that the ball head pin always has a tendency to fall into the above-mentioned positioning groove. Thus, when the handle tube is pulled until the ball head corresponds to the positioning groove, the ball head can fall into the positioning groove under the action of the spring, thereby playing a positioning role. If a force is continuously applied to the handle tube, the acting force of the spring is overcome, and the handle tube can continue to move. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a telescopic handle for a marine propeller that can reliably position the handle tube at any required position state at any time according to the current situation of the prior art, so as to achieve stepless adjustment of the telescopic length of the handle.

[0004] The technical solution adopted by the present invention to solve the above technical problem is as follows: A telescopic handle for a marine propeller includes a handle rod and a handle tube sleeved on the handle rod and capable of axially moving relative to the handle rod. The characteristics are that: an axially extending through hole is formed on the handle rod, a rotating rod that can rotate inside the handle tube and extend into the through hole and axially move together with the handle tube is rotatably installed inside the handle tube. At least one section of the outer wall surface of the rotating rod has a smoothly connected outer arc surface with a gradually increasing circumferential radius to form a protrusion, and at least one section of the inner wall surface of the through hole has a smoothly connected inner arc surface with a gradually increasing circumferential radius to form a concave portion with a gradually increasing depth. And when the rotating rod rotates in the through hole until the outer arc surface corresponds to the inner arc surface, the rotating rod is in clearance fit with the through hole; when the rotating rod rotates in the through hole until the outer arc surface is misaligned with the inner arc surface, the rotating rod is in tight fit with the through hole and is in a locked state.

[0005] In order to achieve automatic locking, a torsion spring is arranged between the handle tube and the rotating rod, which always has a tendency to rotate the rotating rod in the through hole to the locked state.

[0006] For the convenience of manufacturing, a further improvement is that the handle rod is composed of a hollow rod body and a hollow first fixing seat fixed at one end of the rod body, and the inner arc surface is arranged on the first fixing seat.

[0007] In order to have a better operating feel and be able to move smoothly, a plug body that is in sliding contact with the inner wall of the rod body is fixed on the insertion end of the rotating rod.

[0008] In the above-mentioned various solutions, in order to facilitate applying force to the rotating rod, a knob exposed outside the handle tube is installed on the tail of the rotating rod, and one end of the torsion spring is positioned on the knob.

[0009] A further improvement is that a second fixing seat that cooperates with the rotating rod is fixed at one end of the handle tube, and the other end of the torsion spring is positioned on the second fixing seat, so as to facilitate the support of the rotating rod on the handle tube and is beneficial to the assembly of the torsion spring.

[0010] More practical is that a handle sleeve is sleeved on the handle tube to improve the comfort during operation.

[0011] Considering the uniformity of force, preferably, there are two sections of the outer arc surface, which are evenly distributed at intervals along the circumference. Correspondingly, there are also two sections of the inner arc surface.

[0012] In the above-mentioned various solutions, in order to have a certain damping force when the handle tube moves, a first sealing ring is provided on the contact surface between the outer peripheral surface of the first fixing seat and the inner wall surface of the handle tube. Similarly, a third fixing seat sleeved on the handle rod is fixed at the other end of the handle tube, and a second sealing ring is provided on the contact surface between the inner wall surface of the third fixing seat and the outer peripheral surface of the handle rod.

[0013] For the convenience of installation, an installation seat is sleeved on the handle rod exposed outside the handle tube, and the installation seat is provided with an installation hole.

[0014] Compared with the prior art, since the present invention adds a rotating rod, by using the cooperation of the outer arc surface on the rotating rod and the inner arc surface on the inner wall of the through hole, the handle tube is fixed to the handle rod as a whole through the rotating rod, or the outer arc surface on the rotating rod corresponds to the inner arc surface, so that the rotating rod can drive the handle tube to move relative to the handle rod. Therefore, the present invention can also lock the handle tube relative to the handle rod, or let the handle tube move relative to the handle rod, and can be positioned at any position as needed at any time to achieve stepless adjustment of the telescopic length of the handle. At the same time, through the tight fitting method, the positioning is more reliable. And the added torsion spring can automatically position the handle at the required length, making it more relaxed and comfortable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three - dimensional schematic diagram of the application of the embodiment of the present invention to the head of a thruster;

[0016] Figure 2 is Figure 1 Another three - dimensional schematic diagram in a different direction (removing the thruster head housing, shift switch, and display screen);

[0017] Figure 3 is Figure 2 Cross - sectional schematic diagram of (adding a speed control switch);

[0018] Figure 4 is Figure 2 Three - dimensional exploded schematic diagram of (removing the connector);

[0019] Figure 5 is Figure 3 A - A cross - sectional view in (locking state);

[0020] Figure 6 It is a three - dimensional schematic diagram of the rotating rod;

[0021] Figure 7 It is a three - dimensional schematic diagram of the first fixing seat

[0022] Figure 8 is Figure 5 Schematic diagram of the structure when the rotating rod in rotates clockwise until the protrusion is located in the groove (unlocking state). DETAILED DESCRIPTION OF THE INVENTION

[0023] The present invention will be further described in detail below in conjunction with the embodiments of the drawings.

[0024] As shown in Figure 1 The telescopic handle is applied to the head of a marine thruster. The head of the thruster includes a housing 100, a display screen 200 and a shift switch 300 mounted on the housing, and a speed control switch 400 located inside the housing. The telescopic handle 500 partially extends into the housing 100, and the extending end is connected to the operating component of the speed control switch 400 through a connector 600. Since the housing 100, the display screen 200, the shift switch 300, the speed control switch 400, and the connector 600 all adopt existing technologies, no specific description will be further expanded here.

[0025] The main improvement in this embodiment lies in the telescopic handle 500. Please refer to Figures 2 to 7, the telescopic handle 500 includes a handle tube 1, a handle rod 2 and a rotating rod 3. Among them, the handle tube 1 is sleeved on the handle rod 2 and can axially move relative to the handle rod 2 to realize the telescopic function of the handle. The handle rod 2 is designed in a hollow structure, that is, an axially extending through hole 21 is formed on the handle rod. The rotating rod 3 is installed inside the handle tube 1 and can extend into the through hole 21 of the handle rod 2. The rotating rod 3 can axially move relative to the handle rod 2 together with the handle tube 1. At the same time, the rotating rod 3 can rotate relative to the handle tube 1. In order to enable the handle tube 1 to be positioned at any required position at any time when it moves to the required position relative to the handle rod 2, in this embodiment, at least one section of smoothly connected outer arc surface 31 with a gradually increasing circumferential radius is provided on the outer wall surface of the above-mentioned rotating rod 3, that is, from Figure 6 As can be seen, from the circumferential view, the outer arc surface 31 is a convex arc surface formed by the outer wall surface of the rotating rod 3 protruding gradually outward in the circumferential direction, thus forming a protrusion. Axially, the outer arc surface 31 extends along the axis of the rotating rod. At least one section of smoothly connected inner arc surface 22 with a gradually increasing circumferential radius is provided on the inner wall surface of the through hole 21, that is, the inner arc surface 22 is an inner concave arc surface formed by the inner wall surface of the through hole 21 gradually recessing into the wall surface to form a concave part with a gradually increasing depth. And for uniform stress, please refer to Figures 5 to 7 , there are two sections of the outer arc surface 31, which are evenly distributed at intervals in the circumferential direction, and there are also two sections of the corresponding inner arc surface 22. Of course, three sections can also be set, and the specific number is determined according to needs. In this way, the two sections of the outer arc surface 31 can be respectively adapted to the corresponding sections of the inner arc surface 22. When the rotating rod rotates in the through hole to the position where the outer arc surface corresponds to the inner arc surface (that is, the protrusion is completely located in the concave part, please refer to Figure 8 ), the rotating rod 3 and the through hole 21 are in clearance fit, and at this time, the two can move relatively axially and are in an unlocked state; when the rotating rod rotates in the through hole to the position where the outer arc surface is misaligned with the inner arc surface (that is, the protrusion gradually leaves the concave part, please refer to Figure 5 ), the rotating rod 3 and the through hole 21 are in interference fit and are in a locked state, that is, at this time, the rotating rod 3 and the handle rod 2 are connected as a whole.

[0026] The forward and reverse rotations of the above-mentioned rotating rod can be achieved by the operator applying force. However, to improve the comfort of operation, in this embodiment, a torsion spring 4 is further configured. The torsion spring 4 acts between the handle tube 1 and the rotating rod 3 to always have a tendency to rotate the rotating rod 3 in the through hole 21 to the locked state. That is, at this time, the rotating rod 3 is tightly fitted with the handle rod 2, so that the handle tube 1 connected to the rotating rod 3 cannot move relative to the handle rod 2. That is, the torsion spring can achieve the functions of automatic locking and positioning at any desired position. Once an external force (such as the operator applying force to the rotating rod 3 by hand) acts on the rotating rod 3, causing the rotating rod 3 to rotate in the reverse direction after overcoming the acting force of the torsion spring 4, so that the outer arc surface 31 is located in the inner arc surface 22, and the rotating rod 3 is no longer tightly fitted with the handle rod 2. At this time, the handle tube 1 can be moved until it reaches the position, and then the rotating rod 3 is released. At this time, under the action of the torsion spring 4, the rotating rod 3 rotates back to the state where the outer arc surface 31 is misaligned with the inner arc surface 22 and the rotating rod 3 is in tight contact with the through hole 21, that is, the locked state, and the handle tube 1 can no longer move, and the telescopic handle 500 is in a fixed length.

[0027] During manufacturing, the above-mentioned handle rod 3 can be only a rod body, and the inner arc surface 22 is processed on the inner wall of the through hole 21. However, for the convenience of processing, in this embodiment, the handle rod 2 is composed of a hollow rod body 2a and a hollow first fixing seat 2b fixed at one end of the rod body 2a. At this time, the diameter of the through hole in the rod body 2a is larger than the diameter of the through hole in the first fixing seat 2b. The above-mentioned inner arc surface 22 is provided on the inner wall of the through hole of the first fixing seat 2b, so that the axial length of the inner arc surface 22 is shorter and the processing is more convenient. At the same time, a plug 5 that slides in contact with the inner wall of the rod body 2a is fixed on the insertion end of the rotating rod 3. There are various ways to fix the plug 5. In the figure, a radial pin a is used for fixing. In this way, the rotating rod has a certain damping when sliding, and has a better operation feel.

[0028] To facilitate the positioning of the torsion spring 4 and the rotation of the rotating rod 3, a knob 6 exposed outside the handle tube 1 is installed on the tail of the rotating rod 3. The knob is axially limited on the rotating rod 3 by a retaining ring b and a circlip c in a conventional manner. One end of the torsion spring 4 is positioned on the knob 6, and a second fixing seat 7 that cooperates with the rotating rod 3 is fixed at one end of the handle tube 1. The other end of the torsion spring 4 is positioned on the second fixing seat 7. A spacer sleeve 8 is sleeved on the rotating rod 3 on the left side of the second fixing seat 7. The second fixing seat 7 abuts against the knob 6 through the spacer sleeve 8. A retaining ring b and a circlip c are provided on the rotating rod 3 on the left side of the second fixing seat 7. Similarly, axial limitation is carried out. By using the second fixing seat 7 and its axial limitation on the rotating rod 3, the handle tube 1 and the rotating rod 3 can move together axially. At the same time, to have better comfort when moving the handle tube 1, a handle sleeve 9 is sleeved on the handle tube. The surface of the handle sleeve 9 can be designed with various anti-slip patterns.

[0029] In order to have a certain damping force during the movement of the handle tube 1, a first sealing ring 01 is provided on the contact surface between the outer peripheral surface of the above-mentioned first fixing seat 2b and the inner wall surface of the handle tube 1. In the figure, the first sealing ring 01 is installed on the first fixing seat 2b. At the same time, at the other end of the handle tube 1 (i.e., Figure 3 the right end) of Figure 3 , a third fixing seat 10 sleeved on the handle rod 2 is fixed. A second sealing ring 02 is provided on the contact surface between the inner wall surface of the third fixing seat 10 and the outer peripheral surface of the handle rod 2. In the figure, the second sealing ring 02 is installed on the third fixing seat 10. Through the cooperation of the third fixing seat 10 and the first fixing seat 2b, the handle tube 1 can be prevented from moving excessively to the left, while the cooperation of the second fixing seat 7 and the first fixing seat 2b can prevent the handle tube 1 from moving excessively to the right.

[0030] In order to facilitate the installation of the telescopic handle 500, a mounting seat 20 is sleeved on the handle rod 2 exposed outside the handle tube 1. In the figure, the mounting seat 20 is located at the right end of the handle rod 2. Two mounting holes 201 are opened on the mounting seat 20. The mounting seat 20 can be fixed at the corresponding position of the head shell 100 of the thruster by using the mounting holes 201. The two sides of the mounting seat 20 are also axially limited by retaining rings b and circlips c.

[0031] Similarly, a third sealing ring 03 is provided on the contact surface between the inner wall of the mounting seat 30 and the handle rod 2 to increase the damping force during rotation. In the figure, the third sealing ring 03 is installed on the mounting seat 20.

[0032] The positioning of the above-mentioned first fixing seat 2b, second fixing seat 7 and third fixing seat 10 can be achieved by a radial pin a. Of course, other fixing methods can also be adopted.

[0033] In the natural state, under the action of the torsion spring 4, the rotating rod and the handle rod 2 are in Figure 5 a locked state. When it is necessary to change the length of the telescopic handle 500, as long as the knob 6 is rotated clockwise in the direction shown by the arrow in Figure 5 , the rotating rod 3 is driven to rotate. At this time, the torsion spring 4 is stretched, and the outer arc surface 31 enters into the inner arc surface 22 (that is, the protrusion is completely located within the recess, please refer to Figure 8 ), that is, the rotating rod 3 is no longer tightly fitted with the handle rod 2. At this time, when an axial force is applied to the handle sleeve 9, the handle tube 1 and the rotating rod 3 can be driven to move left or right, and the length of the telescopic handle can be lengthened or shortened.

[0034] When the required length is reached, the knob 6 is released. At this time, under the action of the restoring force of the torsion spring 4, the rotating rod 3 is pushed to rotate counterclockwise in the direction shown by the arrow in Figure 8 , so that the outer arc surface 31 on the rotating rod 3 is misaligned with the inner arc surface 22 on the first fixing seat 2b. When the protrusion completely leaves the recess, the tight-fitting force between the two is the greatest (please refer toFigure 5 , ), the handle rod 2 is tightly integrated with the handle tube 1 through the rotating rod 3. At this time, when the rotating handle sleeve 9 is rotated, the telescopic handle can be rotated relative to the mounting seat 30, and the operating component of the speed control switch 400 is driven to rotate through the connecting head 600, thereby achieving the purpose of speed regulation. During this process, the third sealing ring 03 can increase the damping force during rotation to improve the feel during rotation.

Claims

1. A telescopic handle for a marine propeller, comprising a handle rod (2) and a handle tube (1) sleeved on the handle rod (2) and axially movable relative to the handle rod (2), characterized in that: A through hole (21) extending axially is formed in the handle rod (2). A rotating rod (3) that can rotate inside the handle tube (1) and extend into the through hole (21) and axially move together with the handle tube (1) is rotatably installed inside the handle tube (1). At least one section of a smooth and continuously connected outer arc surface (31) with a gradually increasing circumferential radius is formed on the outer wall surface of the rotating rod (3) to form a protrusion. At least one section of a smooth and continuously connected inner arc surface (22) with a gradually increasing circumferential radius is formed on the inner wall surface of the through hole (21) to form a recess with a gradually increasing depth. When the rotating rod (3) rotates in the through hole (21) until the outer arc surface (31) corresponds to the inner arc surface (22), the rotating rod (3) is in clearance fit with the through hole (21). When the rotating rod (3) rotates in the through hole (21) until the outer arc surface (31) is misaligned with the inner arc surface (22), the rotating rod (3) is in tight fit with the through hole (21) and is in a locked state.

2. The telescopic handle according to claim 1, characterized in that: A torsion spring (4) that always has a tendency to rotate the rotating rod (3) in the through hole (21) to the locked state is arranged between the handle tube (1) and the rotating rod (3).

3. The telescopic handle according to claim 1, wherein: The handle rod (2) is composed of a hollow rod body (2a) and a hollow first fixing seat (2b) fixed to one end of the rod body (2a). The inner arc surface (22) is arranged on the first fixing seat (2b).

4. The telescopic handle according to claim 3, wherein: A plug body (5) that is in sliding contact with the inner wall of the rod body (2a) is fixed to the insertion end of the rotating rod (3).

5. The telescopic handle according to claim 2, characterized in that: A knob (6) exposed outside the handle tube (1) is installed on the tail of the rotating rod (3). One end of the torsion spring (4) is positioned on the knob (6).

6. The telescopic handle according to claim 2, characterized in that: A second fixing seat (7) that cooperates with the rotating rod (3) is fixed to one end of the handle tube (1). The other end of the torsion spring (4) is positioned on the second fixing seat (7).

7. The telescopic handle according to claim 1, wherein: A handle sleeve (9) is sleeved on the handle tube (1).

8. The telescopic handle according to claim 1, wherein: There are two sections of the outer arc surface (31), which are evenly distributed along the circumference. Correspondingly, there are also two sections of the inner arc surface (22).

9. The telescopic handle according to claim 3, characterized in that: A first sealing ring (01) is arranged on the contact surface between the outer peripheral surface of the first fixing seat (2b) and the inner wall surface of the handle tube (1).

10. The telescopic handle according to claim 9, characterized in that: A third fixing seat (10) sleeved on the handle rod (2) is fixed to the other end of the handle tube (1). A second sealing ring (02) is arranged on the contact surface between the inner wall surface of the third fixing seat (10) and the outer peripheral surface of the handle rod (2).

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