Butt joint limiting device

Abstract

The utility model provides a butt joint limiting device. The butt joint limiting device comprises a shell, a power assembly, a gear, a guide pin, a telescopic rod, a rack and a limiting switch assembly. The power assembly is fixedly connected outside the shell and comprises a motor and a transmission. The gear is connected with the output end of the transmission; one end of the guide pin is fixedly mounted on the inner bottom surface of the shell, and the other end is provided with a non-circular cylinder; the telescopic rod is arranged in the shell and provided with an installation platform, an installation groove is formed in the installation platform, and a first protruding block is arranged on the side wall, back to the installation platform, of the telescopic rod. A second protruding block is arranged on one side face of the rack and used for fixedly connecting the rack to a mounting platform of the telescopic rod, and teeth meshed with the gear are arranged on the other side face of the rack. The limit switch assembly is arranged in the shell. The butt joint limiting device solves the problems that in the machining and using process of an underwater vehicle, the machining precision is difficult to guarantee, connection is not firm, and misjudgment occurs. And products with limiting requirements in other fields can also be referenced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to device limiting technical field, and specifically relates to a butt joint limiting device. BACKGROUND

[0002] The Chinese patent with the application number CN202011480972.7 discloses a reliable butt joint and self-destruction device and method suitable for underwater unmanned underwater vehicle, adopts the mode of reverse stroke self-locking worm gear transmission combined with gear rack pin transmission, the relative position of the underwater vehicle and the butt joint is locked by the forward rotation of the motor, the transmission design is reused, after information transmission, the motor rotates reversely, the movement position of the rack pin is controlled by the forward and reverse movement of the sliding block along with the rack pin and the touch of the limit micro switch, that is, the extension, reset and retraction of the rack pin can be realized, and the reliable butt joint, smooth release, safe self-destruction and good sealing during the execution of the underwater vehicle are solved.

[0003] The limiting device related to the above patent includes a rack pin, a guide pin, a sliding block and a micro switch, and the following three problems exist in the machining and use process: (1) the rack pin has a strict positioning relationship with the guide pin and the sliding block mounting groove, and the rack pin needs to be machined by special equipment, which cannot be formed on the same machining equipment at one time, so it is difficult to ensure the positioning accuracy in the machining process, resulting in high scrap rate; (2) the rack pin and the sliding block are not firmly connected when used in harsh environment, which is prone to failure, causing abnormal system function, resulting in that the underwater unmanned underwater vehicle cannot realize normal butt joint, sealing and self-destruction function; (3) the rack pin is not provided with rotation limiting, which will rotate around its center axis during the rising and falling process, resulting in that the sliding block trigger point position is out of limit, which cannot be triggered, and further affects the underwater unmanned underwater vehicle, which cannot realize normal butt joint, sealing and self-destruction function. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the above problems of the limiting device, and provides a butt joint limiting device.

[0005] To achieve the above purpose, the technical solution provided by the utility model is:

[0006] The application provides a docking limiting device, which comprises a shell, a power assembly, a gear, a guide pin, a telescopic rod, a rack and a limiting switch assembly; the power assembly is fixedly connected to the outside of the shell and comprises a motor and a transmission, the output shaft of the motor is connected with the input end of the transmission, and the output end of the transmission extends into the inside of the shell; the gear is located in the shell and is connected with the output end of the transmission; the guide pin is arranged perpendicularly to the bottom surface of the shell, one end of the guide pin is fixedly installed on the bottom surface in the shell, and the other end of the guide pin has a non-circular column; the telescopic rod is arranged in the shell and has a mounting platform parallel to the length direction of the telescopic rod, the mounting platform is provided with a mounting groove, and a first protruding block is arranged on the side wall of the mounting platform; one end of the telescopic rod is provided with a non-circular long hole matched with the non-circular column of the guide pin, and the telescopic rod is slidably arranged on the guide pin; one side surface of the rack is provided with a second protruding block matched with the mounting groove, the second protruding block is used for fixedly connecting the rack to the mounting platform of the telescopic rod, the other side surface of the rack has gear teeth matched with the gear, and the gear teeth are used for driving the telescopic rod to move linearly; and the limiting switch assembly is arranged in the shell and is used for limiting the range of linear movement of the telescopic rod.

[0007] Further, a T-shaped block is arranged on the side surface of the rack, wherein the T-shaped block is located below the second protruding block; the mounting platform is provided with a first through hole communicated with the non-circular long hole; and the non-circular column of the guide pin is provided with a T-shaped groove along the length direction of the guide pin, and the T-shaped groove is matched with the T-shaped block.

[0008] Further, the limiting switch assembly comprises an upper limiting switch and a lower limiting switch, the upper limiting switch and the lower limiting switch are located on the side, close to the first protruding block of the telescopic rod, and the upper limiting switch is located above the lower limiting switch, the upper limiting switch is used for up-limiting the telescopic rod, and the lower limiting switch is used for down-limiting the telescopic rod.

[0009] Further, the upper limiting switch is connected in parallel with a 0.1uF anti-jitter capacitor, and the lower limiting switch is connected in parallel with a 0.1uF anti-jitter capacitor.

[0010] Further, the non-circular column has a rectangular cross section, and the non-circular long hole has a rectangular cross section.

[0011] Further, the telescopic rod has a circular cross section at the end of the telescopic rod extending out of the shell.

[0012] Further, the second protruding block is installed in the mounting groove through a flat-end fastening screw.

[0013] The application has the following advantages:

[0014] This improved limiting device solves the manufacturing difficulty problem by splitting the original rack and pin into two separate components: a telescopic rod and a rack. This also improves production efficiency and reduces the scrap rate. Furthermore, the original assembled slider and rack and pin are designed as a single unit, resolving the issue of weak connection. The guide pin is changed from a cylindrical pin to a guide pin with a non-circular end, effectively restricting the connecting rod's rotation around its own center. This solves the problems of difficulty in ensuring machining accuracy, loose connections, and misjudgment that plagued the original limiting device for underwater vehicles during manufacturing and use. Attached Figure Description

[0015] The features and advantages of this invention will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0016] Figure 1 This is a schematic diagram of the internal structure of the improved limiting device in this utility model;

[0017] Figure 2 This is a schematic diagram showing the connection relationship between the rack and the telescopic rod in this utility model;

[0018] Figure 3 yes Figure 2 AA direction view in the middle;

[0019] Figure 4 yes Figure 3 Enlarged view of point B in the image;

[0020] Figure 5 This is a schematic diagram of the telescopic rod in this utility model;

[0021] Figure 6 This is a schematic diagram of the rack structure in this utility model;

[0022] Figure 7 This is a schematic diagram of the guide pin structure in this utility model;

[0023] Figure 8 This is a schematic diagram of the operating principle of the limiting device in this utility model;

[0024] In the diagram: 1-Motor; 2-Gearbox; 3-Telescopic rod; 31-Mounting platform; 32-Mounting groove; 33-First through hole; 34-First protrusion; 4-Rack; 41-Second protrusion; 42-T-block; 5-Housing; 6-Upper limit switch; 7-Lower limit switch; 8-Guide pin; 81-T-slot; 9-Gear. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0026] This invention provides a docking limiting device to solve the problems of difficult processing, unstable connection, and inability to trigger existing limiting devices in the docking and self-destruct mechanisms of underwater vehicles. It can also serve as a reference for similar products in other fields.

[0027] like Figure 1 As shown, the present invention provides a docking limit device, which includes a housing 5, a power component, a gear 9, a guide pin 8, a telescopic rod 3, a rack 4, and a limit switch assembly.

[0028] The telescopic rod 3 and rack 4 in this application are derived by separating the original rack pin. Because the original rack pin has a strict positioning relationship with the guide pin 8 and the slider, and rack 4 requires specialized equipment for processing, the original rack pin cannot be formed in one go on the same processing equipment. This makes it difficult to guarantee positioning accuracy during processing, resulting in a high scrap rate, uncontrollable processing cycle, and affecting normal use. This application separates the original rack pin into the telescopic rod 3 and rack 4. Both the telescopic rod 3 and rack 4 can be processed on the same equipment, and rack 4 can also be processed on a separate specialized equipment. This greatly improves production efficiency, reduces the scrap rate, enhances the inherent reliability of the product, and meets actual usage requirements.

[0029] like Figure 1 , 2 As shown, the power assembly is fixedly connected to the outside of the housing 5, including a motor 1 and a transmission 2. The output shaft of the motor 1 is connected to the input end of the transmission 2, and the output end of the transmission 2 extends into the inside of the housing 5.

[0030] like Figure 2 As shown, gear 9 is located inside housing 5 and is connected to the output end of transmission 2.

[0031] like Figure 2 , 7 As shown, the guide pin 8 is set perpendicular to the bottom surface of the housing 5, with one end fixedly installed on the inner bottom surface of the housing 5 and the other end being a non-circular cylinder.

[0032] like Figure 1 , 5 As shown, the telescopic rod 3 is installed inside the shell 5 and has an installation platform 31 parallel to its length direction. The installation platform 31 is provided with an installation groove 32, and the side wall backing the installation platform 31 has a first protrusion 34. One end of the telescopic rod 3 is provided with a non-circular elongated hole that matches the non-circular column of the guide pin 8, and the telescopic rod 3 is slidably sleeved on the guide pin 8.

[0033] The original cylindrical pin was fitted onto the lower end of a rack pin. During its ascent and descent, the rack pin rotated around its central axis, causing the trigger point of the slider mounted on the rack pin to exceed its limit, preventing the limit switch assembly from being triggered. This affected the underwater drone, hindering its normal docking, sealing, and self-destruct functions. The guide pin 8 designed in this application has a non-circular upper end, fitted into a non-circular elongated hole at the lower end of the telescopic rod 3. This restricts the telescopic rod 3 from rotating relative to the guide pin 8, thus accurately triggering the limit switch assembly and enabling the underwater drone to perform normal docking, sealing, and self-destruct functions. A first protrusion 34, integrally molded onto the telescopic rod 3, contacts the limit switch assembly, solving the problem of the original rack pin and slider connection being unstable.

[0034] like Figure 1 , 6 As shown, one side of the rack 4 is provided with a second protrusion 41 that mates with the mounting groove 32, which is used to fix the rack 4 to the mounting platform 31 of the telescopic rod 3. The second protrusion 41 can be fixedly connected to the telescopic rod 3 by screws. The other side has teeth that mesh with the gear 9, which are used to drive the telescopic rod 3 to move linearly.

[0035] The rack 4 of this application has a second protrusion 41 that cooperates with the mounting groove 32 for installation, which can fix the rack 4 to the telescopic rod 3. The rack 4 on the other side meshes with the gear 9 for transmission, and the rotation of the gear 9 drives the telescopic rod 3 to move as follows. Figure 2 The movement in the up and down directions, as shown, enables the limit switch assembly to open, thereby completing the normal docking, sealing, and self-destruct functions of the underwater vehicle.

[0036] like Figure 1 , 2 As shown, the limit switch assembly is disposed within the housing 5 to limit the linear movement range of the telescopic rod 3. When the first protrusion 34 moves, it makes mechanical contact with the limit switch assembly to limit the vertical movement range of the telescopic rod 3.

[0037] This improved limiting device solves the manufacturing difficulty problem by splitting the original rack and pin into two separate components: a telescopic rod 3 and a rack 4. This also improves production efficiency and reduces the scrap rate. The original assembled slider and rack and pin are designed as a single unit, resolving the issue of weak connection. Furthermore, the guide pin 8 is changed from a cylindrical pin to a guide pin with a non-circular end, effectively restricting the connecting rod from rotating around its own center. This solves the problems of difficulty in ensuring machining accuracy, loose connection, and misjudgment that occurred during the manufacturing and use of the original limiting device for underwater vehicles.

[0038] like Figure 5 , 6As shown in Figures 7 and 8, a T-shaped block 42 located below the second protrusion 41 is provided on the side of the rack 4; a first through hole 33 communicating with the non-circular elongated hole is provided on the mounting platform 31; a T-shaped groove 81 along the length direction of the guide pin 8 is provided on the non-circular column of the guide pin 8, and the T-shaped groove 81 matches the T-shaped block 42.

[0039] like Figure 3 , 4 As shown, in this embodiment, the T-block 42 extends through the first through hole 33 into the T-slot 81. The T-block 42, engaged in the T-slot 81, secures the rack 4 to the guide pin 8 and telescopic rod 3 at both the upper and lower positions, preventing it from shifting relative to the telescopic rod 3. This results in a more stable connection between the telescopic rod 3 and the rack 4, and a more stable transmission between the rack 4 and the gear 9. When the telescopic rod 3 and the rack 4 move on the guide pin 8, the T-block 42 moves along the T-slot 81, thus preventing the lower end of the rack 4 from shifting and causing transmission errors.

[0040] During installation, first install the rack 4 onto the telescopic rod 3, then insert the non-circular cylindrical guide pin 8 into the non-circular elongated hole on the telescopic rod 3. Finally, install the assembled unit onto the housing 5. Specifically, the upper end of the telescopic rod 3 extends from the second through hole on the housing 5, and the lower end of the guide pin 8 is interference-fitted with the circular hole at the bottom of the housing 5. Alternatively, other connection methods can be used to fix the lower end of the guide pin 8 onto the housing 5.

[0041] like Figure 8 As shown, the limit switch assembly includes an upper limit switch 6 and a lower limit switch 7. Both the upper limit switch 6 and the lower limit switch 7 are located on the side near the top of the first protrusion 34 on the telescopic rod 3, and the upper limit switch 6 is located above the lower limit switch 7. The upper limit switch 6 is used for the upward limit of the telescopic rod 3, and the lower limit switch 7 is used for the downward limit of the telescopic rod 3.

[0042] The upper limit switch 6 is connected in parallel with a 0.1uF debounce capacitor, and the lower limit switch 7 is connected in parallel with a 0.1uF debounce capacitor. The presence of a 0.1uF debounce capacitor on both the upper limit switch 6 and the lower limit switch 7 can prevent misjudgment during operation of the limit device.

[0043] like Figure 7 As shown, the cross-section of the non-circular cylinder of guide pin 8 is rectangular; the cross-section of the non-circular elongated hole is also rectangular. The rectangular cross-section of the non-circular cylinder effectively restricts the rotation of guide pin 8 around its central axis during operation. The cross-section of the non-circular cylinder can also be elliptical or other non-circular shapes.

[0044] like Figure 7 As shown, the cross-section of the end of the telescopic rod 3 extending out of the housing 5 is circular, allowing it to fit tightly into the third through hole on the housing 5.

[0045] The second protrusion 41 is installed in the mounting slot 32 by a flat-end fastening screw, which makes the rack 4 more securely connected to the telescopic rod 3.

[0046] The limiting function of the docking limit device is achieved through the following steps:

[0047] Step 1: The control computer connects the power supply to motor 1. Motor 1 rotates forward, and gearbox 2 drives gear 9 to rotate. Through the meshing transmission between gear 9 and rack 4, the telescopic rod 3 is driven to move forward, and the telescopic rod 3 performs the extension action.

[0048] Step 2: The telescopic rod 3 mechanically touches the upper limit switch 6, the upper limit switch 6 is activated, preventing the telescopic rod 3 from extending further, the control computer cuts off the power to the motor 1, the motor 1 stops working, the telescopic rod 3 reverses its travel and self-locks, and is fixed in the limit position;

[0049] Step 3: The control computer turns on the power to motor 1, motor 1 reverses, and gearbox 2 drives gear 9 to rotate. Through the meshing transmission between gear 9 and rack 4, the telescopic rod 3 is driven to move in the opposite direction, and the telescopic rod 3 performs a retraction action.

[0050] Step 4: The telescopic rod 3 mechanically touches the lower limit switch 7, the lower limit switch 7 is activated, preventing the telescopic rod 3 from retracting, the control computer cuts off the power to the motor 1, the motor 1 stops working, the telescopic rod 3 reverses its travel and self-locks, fixing the initial position;

[0051] Step 5: The control computer simultaneously turns on the power to motor 1 and the lower limit switch 7. Motor 1 reverses, and the gearbox 2 drives gear 9 to rotate. Through the meshing transmission between gear 9 and rack 4, the telescopic rod 3 is driven to continue to retract, achieving the limit at another position.

[0052] This embodiment presents an improved limiting device, an electromechanical integrated device. Based on the original device, it addresses issues such as difficulty in ensuring machining accuracy, loose connections, and misjudgments encountered during the processing and use of underwater vehicles through integrated structural design, changes in the shape of the guide pin 8, and the addition of anti-shake capacitors. The improved limiting device has passed practical verification, demonstrating its rationality, feasibility, and effectiveness.

[0053] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered as included within the protection scope of the present invention.

Claims

1. A docking limiting device, characterized in that, include: case; A power assembly, fixedly connected to the outside of the housing, includes a motor and a transmission. The output shaft of the motor is connected to the input end of the transmission, and the output end of the transmission extends into the inside of the housing. A gear is located inside the housing and is connected to the output end of the transmission; A guide pin is provided perpendicular to the bottom surface of the housing, with one end fixedly installed on the inner bottom surface of the housing and the other end having a non-circular column. A telescopic rod is disposed within the housing and has a mounting platform parallel to its length direction. The mounting platform is provided with a mounting groove, and a first protrusion is provided on the side wall backing against the mounting platform. One end of the telescopic rod is provided with a non-circular elongated hole that matches the non-circular cylinder of the guide pin, and the telescopic rod is slidably sleeved on the guide pin. The rack has a second protrusion on one side that mates with the mounting groove, for fixing the rack to the mounting platform of the telescopic rod, and teeth on the other side that mesh with the gear, for driving the telescopic rod to move linearly. A limit switch assembly is disposed within the housing to limit the range of linear movement of the telescopic rod.

2. The docking limiting device according to claim 1, characterized in that, The rack is provided with a T-shaped block located below the second protrusion on its side; The mounting platform is provided with a first through hole that communicates with the non-circular elongated hole; The non-circular cylindrical part of the guide pin is provided with a T-shaped groove along the length of the guide pin, and the T-shaped groove matches the T-shaped block.

3. The docking limiting device according to claim 1, characterized in that, The limit switch assembly includes an upper limit switch and a lower limit switch. Both the upper limit switch and the lower limit switch are located on the side near the telescopic rod where the first protrusion is located, and the upper limit switch is located above the lower limit switch. The upper limit switch is used to limit the upward movement of the telescopic rod, and the lower limit switch is used to limit the downward movement of the telescopic rod.

4. The docking limiting device according to claim 3, characterized in that, The upper limit switch is connected in parallel with a 0.1uF debounce capacitor, and the lower limit switch is connected in parallel with a 0.1uF debounce capacitor.

5. The docking limiting device according to claim 1, characterized in that, The cross-section of the non-circular cylinder is rectangular; the cross-section of the non-circular elongated hole is rectangular.

6. The docking limiting device according to claim 1, characterized in that, The cross-section of the end of the telescopic rod that extends out of the housing is circular.

7. The docking limiting device according to claim 1, characterized in that, The second protrusion is installed in the mounting groove by a flat-end fastening screw.

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