Flexible lock shaft device

Abstract

The embodiment of the utility model discloses a flexible lock shaft device, which comprises a hollow sleeve with two open ends; the outer ring is arranged in the hollow inner cavity of the sleeve and is fixed in the hollow inner cavity of the sleeve through a fixing piece, an annular step extending inwards is arranged at the bottom of the outer ring, and the steering engine shaft is inserted from the bottom of the outer ring and is arranged in an inner circle of the annular step; the damping ring is arranged on the step and used for providing damping for the steering engine shaft; the pressing ring is used for tightly pressing the damping ring on the step; and the fastening sleeve is movably connected with the outer ring and used for adjusting the pressing degree of the pressing ring on the damping ring. A backlash gap of the steering engine is avoided, and navigation noise and abrasion of the steering engine are reduced.

Description

Technical Field

[0001] The utility model relates to the field of underwater vehicles, in particular to a flexible shaft locking device. Background Art

[0002] At present, the output speed of the servo for underwater vehicles is generally low, but the backlash is small and the control accuracy is high. Due to the structure of the servo itself, especially the servo with worm gear as the last stage of deceleration, the backlash is large. The large backlash will cause the rudder plate connected to the servo to swing up and down (left and right) when impacted by the water flow, and the collision between the worm gear and the worm gear will cause noise, affecting the concealment of navigation. Therefore, it is necessary to put forward higher requirements for the backlash of the servo of underwater vehicles.

[0003] The backlash of the servo is determined by the mechanical structure of the servo, which cannot be completely eliminated and will gradually increase as the servo wears. Reducing the backlash of the servo will inevitably improve the assembly accuracy, which will increase the wear of the servo to a certain extent.

[0004] There is no effective implementation method for the problem that the steering gear in the prior art has backlash and generates navigation noise. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a flexible shaft locking device, which provides a damping torque to the servo shaft by compressing the damping ring. In this way, when the external force is less than the damping torque, the servo shaft is locked, there is no backlash and no navigation noise is generated, thereby solving the problem of the servo having a backlash and generating navigation noise in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides a flexible shaft locking device, comprising: a sleeve, which is hollow and has openings at both ends; an outer ring, which is arranged in the hollow inner cavity of the sleeve and fixed in the hollow inner cavity of the sleeve by a fixing member, and the bottom of the outer ring is provided with an annular step extending inward, and the servo shaft is inserted from the bottom of the outer ring and is arranged in the inner circle of the annular step; a damping ring, which is arranged on the step and is used to provide damping for the servo shaft; a pressure ring, which presses the damping ring against the step; and a fastening sleeve, which is movably connected to the outer ring and is used to adjust the degree of pressure of the pressure ring on the damping ring.

[0007] Further optionally, the fixing member is a screw.

[0008] Further optionally, the outer ring is connected to the sleeve via a plurality of screws; each screw is inserted radially into the outer ring from the outside of the sleeve to connect the sleeve to the outer ring.

[0009] Further optionally, the outer wall of the sleeve extends outward by

[0010] A mounting platform is provided, and the mounting platform is used to be connected with the steering gear housing.

[0011] Further optionally, the outer wall of the sleeve is provided with four mounting platforms; the four mounting platforms are evenly distributed on the outer wall of the sleeve.

[0012] Further optionally, the fastening sleeve is threadedly connected to the outer ring at a position close to the top.

[0013] Further optionally, the damping ring is a silicone rubber ring.

[0014] Further optionally, a control hole is provided on the top of the fastening sleeve.

[0015] The above technical solution has the following beneficial effects: by extruding and deforming the damping ring, the output shaft of the servo is locked, so that the requirement of no backlash of the servo when the external torque is not greater than the damping torque is met; the device has a simple structure and a small volume, and is easy to assemble and install. It is suitable for use in a variety of environments and working conditions, and can output different damping torques according to the size of the compression deformation of the damping ring by the fastening sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic cross-sectional structure diagram of a flexible shaft locking device provided by an embodiment of the utility model;

[0018] Figure 2 It is a three-dimensional structural schematic diagram of the flexible shaft locking device provided in an embodiment of the utility model.

[0019] Figure numerals: 1-sleeve; 2-outer ring; 3-pressure ring; 4-fastening sleeve; 5-servo shaft; 6-damping ring; 7-fixing part; 8-mounting platform; 9-control hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In order to solve the problem that the steering gear in the prior art has backlash and generates navigation noise, the embodiment of the utility model provides a flexible shaft locking device. Figure 1 Schematic diagram of the structure of the flexible shaft locking device provided by the embodiment of the utility model. Figure 1 As shown, the device comprises: a sleeve 1, which is hollow and has openings at both ends; an outer ring 2, which is arranged in the hollow inner cavity of the sleeve 1 and fixed in the hollow inner cavity of the sleeve 1 by a fixing member 7, and an annular step extending inward is provided at the bottom of the outer ring 2, and the steering gear shaft 5 is inserted from the bottom of the outer ring 2 and arranged in the inner circle of the annular step; a damping ring 6, which is arranged on the step and is used to provide damping for the steering gear shaft 5; a pressure ring 3, which presses the damping ring 6 on the step; a fastening sleeve 4, which is movably connected to the outer ring 2 and is used to adjust the degree of pressure of the pressure ring 3 on the damping ring 6.

[0022] Figure 2 Schematic diagram of the three-dimensional structure of the flexible shaft locking device provided by the embodiment of the utility model. Figure 1 , Figure 2 As shown, the sleeve 1 is cylindrical, hollow, and open at both ends.

[0023] The outer ring 2 is annular and is accommodated in the hollow inner cavity of the sleeve 1. More specifically, the outer ring 2 is arranged at the top of the hollow inner cavity, and the top surface of the outer ring 2 is flush with the top surface of the sleeve 1. The outer ring 2 is fixed in the hollow inner cavity of the sleeve 1 by a fixing member 7 to ensure that the relative position of the outer ring 2 and the sleeve 1 will not move. The bottom of the outer ring 2 is also provided with an annular step extending inward, and the inner circle of the annular step is used to allow the steering gear shaft 5 to pass through.

[0024] A damping ring 6 is provided at the top of the annular step, and a pressure ring 3 is provided at the top of the damping ring 6. When the pressure ring 3 provides a clamping force to the damping ring 6, the damping ring 6 is restricted in the gap between the outer ring 2 and the lower part of the steering gear shaft 5 and cannot move downward. Under the compression of the pressure ring 3, the damping ring 6 expands to both sides, adheres to and squeezes the outer ring 2 and the steering gear shaft 5, and provides a damping torque for the rotation of the steering gear shaft 5. In this way, when the external force of rotation is less than the damping torque, the steering gear shaft 5 can be locked so that there is no backlash.

[0025] The clamping sleeve 4 is arranged in the inner circle of the outer circle and is movably connected to the outer ring 2. The depth of the clamping sleeve 4 in the outer circle can be adjusted to adjust the clamping force of the pressure ring 3, and the clamping degree of the pressure ring 3 on the damping ring 6 can be further adjusted to adjust the size of the damping torque.

[0026] like Figure 1As shown, the whole of the fastening sleeve 4 is in the shape of a short cylinder, and the middle part of the bottom is recessed inward to form a groove, the diameter of which is slightly larger than the diameter of the servo shaft 5, so as to ensure that the head of the servo shaft 5 can enter the bottom groove to provide a larger pressing space.

[0027] As an optional implementation, for different steering gear shafts 5 , damping rings 6 of different materials and sizes can be used to provide the damping torque of the steering gear shaft 5 .

[0028] As an optional implementation, the fixing member 7 is a screw.

[0029] The fixing sleeve is connected to the outer ring 2 by screws, which can ensure that the outer ring 2 is stably installed together with the fixing sleeve. In addition, when disassembling, the relative position of the outer ring 2 and the fixing sleeve can be released by simply removing the screws.

[0030] As an optional implementation, the outer ring 2 is connected to the sleeve 1 via a plurality of screws; each screw is inserted into the outer ring 2 radially from the outside of the sleeve 1 to connect the sleeve 1 to the outer ring 2.

[0031] like Figure 2 As shown, each screw passes through the side walls of the sleeve 1 and the outer ring 2 in sequence from the outside of the sleeve 1 in the radial direction to complete the connection between the sleeve 1 and the outer ring 2. In this embodiment, screw holes are opened on the side wall of the sleeve 1, and corresponding screw holes are also opened on the outer ring 2. During installation, the screw holes of the sleeve 1 need to correspond to the screw holes of the outer ring 2 before they can be connected by screws, thus ensuring the relative position of the outer ring 2 and the sleeve 1.

[0032] like Figure 1 As shown, the outer wall of the outer ring fits tightly with the inner wall of the sleeve, increasing the friction between the two and further improving the installation stability.

[0033] As an optional implementation, four fixing members 7, namely four screws, are provided in this embodiment. The four screws are evenly distributed in the circumference of the sleeve 1 to ensure the stability of the assembly.

[0034] As an optional implementation, a plurality of mounting platforms 8 are extended outward from the outer wall of the sleeve 1, and the mounting platforms 8 are used to be connected to the steering gear housing.

[0035] like Figure 2 As shown, the outer wall of the sleeve 1 is provided with a plurality of mounting platforms 8, and the mounting platforms 8 extend outward from the side wall of the sleeve 1. Optionally, the mounting platforms 8 are provided with through threaded holes, and the mounting platforms 8 can be connected to the steering gear housing by screws.

[0036] As an optional implementation, the outer wall of the sleeve 1 is provided with four mounting platforms 8 ; the four mounting platforms 8 are evenly distributed on the outer wall of the sleeve 1 .

[0037] Furthermore, in this embodiment, four mounting platforms 8 are provided on the outer wall of the sleeve 1. The four mounting platforms 8 are evenly distributed on the outer wall of the sleeve 1. The sleeve 1 is firmly mounted on the housing of the servo through the four mounting platforms 8, ensuring that the entire flexible shaft locking device will not fall off when the servo is running.

[0038] As an optional implementation, the fastening sleeve 4 is threadedly connected to the outer ring 2 near the top.

[0039] like Figure 1 As shown, the fastening sleeve 4 is arranged in the inner circle of the outer ring 2, and its edge is provided with threads, the inner wall of the outer ring 2 is also provided with threads, the fastening sleeve 4 and the outer ring 2 are threadedly matched, and the fastening sleeve 4 is rotated to adjust the clamping force of the pressure ring 3, and further adjust the damping torque.

[0040] Specifically, when the fastening sleeve 4 is rotated to move it downward, the pressure ring 3 will move downward, and the pressure ring 3 moves downward to compress the damping ring 6. At this time, since the damping ring 6 is arranged on the annular step and is limited in the gap between the lower part of the outer ring 2 and the steering gear shaft 5, it can no longer move downward. Therefore, under the compression of the pressure ring 3, the damping ring 6 opens to both sides, adheres to and squeezes the outer ring 2 and the steering gear shaft 5, and provides a damping torque for the rotation of the steering gear shaft 5; when the fastening sleeve 4 is rotated to move it upward, the clamping force on the pressure ring 3 will gradually reduce. At this time, the opening amplitude of the damping ring 6 to both sides is reduced, thereby further reducing the damping torque.

[0041] By changing the distance that the clamping sleeve 4 rotates downward, the compression deformation degree of the damping ring 6 can be changed, thereby changing the damping torque of the steering gear shaft 5. When the external force is less than the damping torque, the steering gear shaft 5 is locked without backlash.

[0042] As an optional implementation, the damping ring 6 is a silicone rubber ring.

[0043] Silicone rubber has a high damping coefficient and can effectively suppress mechanical vibration, reduce noise and loss, and ensure stable operation of equipment.

[0044] As an optional implementation, a control hole 9 is provided on the top of the fastening sleeve 4 .

[0045] like Figure 2 As shown, a control hole 9 is provided in the middle of the top surface of the fastening sleeve 4, and a control handle can be installed in the control hole 9, and the rotation control of the fastening sleeve 4 is completed by rotating the control handle. Furthermore, the control handle can be manually controlled or connected to a power assembly for automatic control.

[0046] The above technical solution has the following beneficial effects: by extruding and deforming the damping ring, the output shaft of the servo is locked, so that the requirement of no backlash of the servo when the external torque is not greater than the damping torque is met; the device has a simple structure and a small volume, and is easy to assemble and install. It is suitable for use in a variety of environments and working conditions, and can output different damping torques according to the size of the compression deformation of the damping ring by the fastening sleeve.

[0047] The specific implementation methods of the utility model above further explain in detail the purpose, technical solutions and beneficial effects of the utility model. It should be understood that the above content is only the specific implementation methods of the utility model and is not used to limit the protection scope of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A flexible shaft locking device, characterized in that: include: A sleeve, wherein the sleeve is hollow and has openings at both ends; An outer ring, the outer ring is arranged in the hollow inner cavity of the sleeve and fixed in the hollow inner cavity of the sleeve by a fixing member, the bottom of the outer ring is provided with an annular step extending inward, the steering gear shaft is inserted from the bottom of the outer ring and arranged in the inner circle of the annular step; A damping ring, which is arranged on the step and is used to provide damping for the steering gear shaft; A pressure ring, wherein the pressure ring presses the damping ring onto the step; The fastening sleeve is movably connected to the outer ring and is used to adjust the degree of compression of the pressure ring on the damping ring.

2. The flexible shaft locking device according to claim 1, characterized in that: The fixing member is a screw.

3. The flexible shaft locking device according to claim 2, characterized in that: The outer ring is connected to the sleeve via a plurality of screws; Each screw is inserted into the outer ring radially from the outer side of the sleeve to connect the sleeve with the outer ring.

4. The flexible shaft locking device according to claim 1, characterized in that: The outer wall of the sleeve is provided with a plurality of mounting platforms extending outwardly, and the mounting platforms are used to be connected to the steering gear housing.

5. The flexible shaft locking device according to claim 4, characterized in that: The outer wall of the sleeve is provided with four mounting platforms; The four mounting platforms are evenly distributed on the outer wall of the sleeve.

6. The flexible shaft locking device according to claim 1, characterized in that: The fastening sleeve is threadedly connected to the outer ring at a position close to the top.

7. The flexible shaft locking device according to claim 1, characterized in that: The damping ring is a silicone rubber ring.

8. The flexible shaft locking device according to claim 1, characterized in that: A control hole is arranged on the top of the fastening sleeve.

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