Detachable power inflatable lifeboat

Abstract

The application relates to the field of life-saving boats, in particular to a detachable power inflatable life-saving boat, which comprises an inflatable boat body, a plurality of elastic safety belts are symmetrically arranged on the two sides of the inflatable boat body, three groups of mounting devices are arranged in a triangular shape on the lower end surface of the inflatable boat body, a detachable propelling device is arranged on one side of the mounting device, a connecting rope is arranged at the bottom end of the mounting device, a limiting rod capable of being transversely inserted into the bottom end of the mounting device is arranged at one end of the connecting rope, the limiting rod fixes the propelling device on one side of the mounting device, clamping blocks capable of rebounding for limiting are arranged on the two sides of the one end of the limiting rod, a mounting base traction device is arranged at the front end of the upper end surface of the inflatable boat body, and a control device for controlling the life-saving boat is arranged on the top of the traction device. The application realizes that the propelling device and the control device can be quickly detached and mounted with the inflatable boat body, and solves the problem that the inflatable life-saving boat cannot be detached and is inconvenient to store.

Description

Technical Field

[0001] This invention relates to the field of lifeboats, and more specifically to a detachable, powered, inflatable lifeboat. Background Technology

[0002] Lifeboats are service vessels specifically designed for maritime rescue and underwater operations. They are equipped with specialized equipment and can perform a variety of rescue missions. Depending on their function, lifeboats can be classified as submarine rescue boats, rescue tugboats, fireboats, diving workboats, and salvage boats.

[0003] Chinese patent CN117048808B discloses an unmanned rescue boat with a grabbing function, including a hull with two airbags fixedly mounted on it; an inflation component for inflating the airbags; a grabbing component comprising two grabbing blocks, each with a sliding rod fixedly mounted on it, the sliding rod being slidably connected to the hull, and a fixing block fixedly mounted on the sliding rod; and a triggering component for unlocking a reciprocating component under the weight of the drowning person. In use, after the drowning person lies on the hull, the triggering component unlocks the reciprocating component, causing it to reciprocate and inflate the airbags, increasing the buoyancy of the hull and preventing the drowning person from sinking due to gravity during return, thus avoiding breathing difficulties and maintaining the stability of the rescue. Furthermore, the reciprocating component allows the grabbing blocks to grip the drowning person, saving the drowning person's energy. However, it still has the following shortcomings.

[0004] Existing lifeboats are usually designed as a single unit, which means that the power unit and control unit cannot be separated from the hull after use, making it inconvenient to store the lifeboat. Therefore, the inventors have proposed a detachable, powered, inflatable lifeboat to solve the above problems. Summary of the Invention

[0005] To address the aforementioned issues, a detachable powered inflatable lifeboat is provided. Several mounting devices are installed on the lower end face of the inflatable lifeboat body, allowing the propulsion device to be mounted on one side of the mounting devices. A limiting rod secures the mounting devices and the propulsion device. A traction device is then installed at the front end of the upper end face of the inflatable lifeboat body, and a control device is mounted on top of the traction device. This allows for quick detachment and installation of the propulsion device and control device from the inflatable lifeboat body, solving the problem of inconvenient storage and non-detachable inflatable lifeboats.

[0006] To address the problems of existing technologies, this invention provides a detachable powered inflatable lifeboat, comprising an inflatable boat body. Several elastic safety belts are symmetrically arranged on both sides of the inflatable boat body. Three sets of mounting devices are arranged in a triangular pattern on the lower end face of the inflatable boat body. A detachable propulsion device is provided on one side of each mounting device, and a connecting rope is provided at the bottom of each mounting device. One end of the connecting rope is provided with a limiting rod that can be inserted laterally into the bottom end of the mounting device, fixing the propulsion device to one side of the mounting device. Reboundable locking blocks are provided on both sides of one end of the limiting rod for limiting the position. A mounting base traction device is provided at the front end of the upper end face of the inflatable boat body, and a control device for controlling the lifeboat is installed on the top of the traction device. This allows for quick detachment and installation of the propulsion device and control device from the inflatable boat body, making the inflatable lifeboat easier to store.

[0007] As a technical solution of the present invention, the installation device includes a base that is sealed and fixed to the lower end face of the inflatable boat body. A boss is provided on one side of the base. A second limiting groove for limiting is provided at the center of the inside of the boss. A first rectangular hole for installing a limiting rod is provided through both sides of the bottom end of the boss, so that the limiting rod can fix the propulsion device to one side of the installation device.

[0008] As a technical solution of the present invention, the propulsion device includes a housing, and a first limiting block that can be installed inside the second limiting groove is provided on one side of the housing. The bottom of the first limiting block is provided with a second clearance groove that can be adapted to the first rectangular hole, so that the first limiting block can be installed inside the second limiting groove.

[0009] As a technical solution of the present invention, a rotary drive component is installed inside the bottom end of the housing, and a propeller capable of rotating to propel the lifeboat is installed outside the output end of the rotary drive component. A fairing is provided at the bottom end of the housing, and the top end of the fairing is fixed by a first threaded sleeve. A rechargeable battery is installed at the center inside the housing, and a charging port for charging is provided on one side of the top end of the housing. A lampshade is provided at the top end of the housing, and a light bulb is installed at the center inside the lampshade. The lampshade is fixed to the top end of the housing by a second threaded sleeve to facilitate the installation of the light bulb inside the lampshade. When the second threaded sleeve installs the lampshade at one end of the housing, the lampshade is electrically connected to the battery, thereby enabling the lampshade to emit light, thus allowing the inflatable lifeboat to meet the working environment in low-light conditions at night.

[0010] As a technical solution of the present invention, an inflation port for inflation is provided on the upper end of the inflatable boat body near the traction device. A sealing plug for sealing is installed at the top of the inflation port so that the interior of the inflatable boat body can be inflated through the inflation port and then sealed by the sealing plug.

[0011] As one technical solution of the present invention, the traction device includes a fixed base fixed to the upper end face of the inflatable boat body. A mounting bracket is fixed at the center of the upper end face of the fixed base near the front end. A bolt is installed inside the top of the mounting bracket. A first mounting seat is provided at the center of the upper end face of the fixed base. A first clearance groove is provided inside the front end of the first mounting seat. A buckle is movably provided inside the first clearance groove. A push rod is provided on one side of the bottom end of the buckle. One end of the push rod extends out of the interior of the first mounting seat. A return spring is provided on the other side of the bottom end of the buckle. The return spring abuts against the inner wall of the first clearance groove so that the return spring can be installed on the other side of the bottom end of the buckle. One end of the return spring abuts against the inner wall of the first clearance groove, so that the return spring pushes the buckle to reset.

[0012] As a technical solution of the present invention, an elliptical limiting boss for limiting is provided at the center of the inclined surface at the center of the first mounting base, and semi-circular first limiting grooves are symmetrically provided on both sides of the center of the inclined surface at the center of the first mounting base. A first locking groove is provided at the end of the upper surface of the first mounting base. Two sets of abutting blocks are symmetrically provided inside the first locking groove, and a rotatable threaded rod is provided at the center of one side of the abutting block. One end of the threaded rod can pass through the threaded rod and extend outward, so that the threaded rod can drive the abutting block to move horizontally and press the control device against it.

[0013] As a technical solution of the present invention, the control device includes a control boss, two sets of handles for operating the lifeboat are symmetrically arranged on both sides of the control boss, and a second mounting seat that is snapped onto the top of the towing device is provided at the bottom of the control boss. A limiting frame that can be adapted to the mounting frame is provided at the center of the front end of the second mounting seat, and a second slot for snapping on the buckle is provided inside the front end of the bottom of the second mounting seat. A third limiting groove that can be adapted to the limiting boss is provided at the center of the inclined surface at the bottom of the second mounting seat, and a second limiting block that can be installed inside the first limiting groove is symmetrically arranged on both sides of the inclined surface at the bottom of the second mounting seat. Two sets of second rectangular holes are symmetrically arranged at the front end of the second mounting seat so that the abutment block can be inserted into the second rectangular hole and the second mounting seat is pressed tightly to prevent the second mounting seat from falling off the first mounting seat.

[0014] The advantages of this invention compared to the prior art are:

[0015] This application solves the problem of inflatable lifeboats being difficult to disassemble and store by setting several mounting devices on the lower end face of the inflatable boat body, allowing the propulsion device to be installed on one side of the mounting device and the mounting device and propulsion device to be fixed by a limiting rod. Then, by setting a traction device at the front end of the upper end face of the inflatable boat body, and then installing the control device on the top of the traction device, the propulsion device and control device can be quickly disassembled and installed from the inflatable boat body. Attached Figure Description

[0016] Figure 1 A three-dimensional structural diagram of a detachable, powered, inflatable lifeboat. Figure 1 .

[0017] Figure 2 A three-dimensional structural diagram of a detachable, powered, inflatable lifeboat. Figure 2 .

[0018] Figure 3 This is a top view of a detachable, powered, inflatable lifeboat.

[0019] Figure 4 yes Figure 3 Sectional view at point AA.

[0020] Figure 5 This is a perspective view of the mounting base in a detachable powered inflatable lifeboat.

[0021] Figure 6 This is a three-dimensional diagram of a limiting rod in a detachable powered inflatable lifeboat.

[0022] Figure 7 This is a perspective view of the power unit in a detachable, powered, inflatable lifeboat.

[0023] Figure 8 This is a perspective view of a fixing device in a detachable powered inflatable lifeboat.

[0024] Figure 9 This is a 3D diagram of a hook in a detachable, powered, inflatable lifeboat.

[0025] Figure 10 This is a perspective view of the control device in a detachable, powered, inflatable lifeboat.

[0026] The following are the labels in the diagram: 1. Inflatable boat body; 2. Safety belt; 3. Towing device; 31. Fixed base; 32. Mounting bracket; 33. Bolt; 34. First mounting seat; 35. First clearance groove; 36. Buckle; 37. Push rod; 38. Return spring; 39. Limiting boss; 310. First limiting groove; 311. First slot; 312. Threaded rod; 313. Abutment block; 4. Mounting device; 41. Base; 42. Boss; 43. Second limiting groove; 44. First rectangular hole; 5. Propulsion device; 51. Shell; 52. Rotary drive 53. Propeller; 54. Fairing; 55. First threaded sleeve; 56. Battery; 57. Lampshade; 58. Second threaded sleeve; 59. Light bulb; 510. Charging port; 511. First limiting block; 512. Second clearance groove; 6. Air inlet; 61. Sealing plug; 7. Connecting rope; 71. Limiting rod; 72. Locking block; 8. Control device; 81. Control boss; 82. Second mounting base; 83. Limiting frame; 84. Second slot; 85. Third limiting groove; 86. Second limiting block; 87. Second rectangular hole; 88. Handle. Detailed Implementation

[0027] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0028] See Figures 1-10 As shown, a detachable powered inflatable lifeboat includes an inflatable boat body 1. Several elastic safety belts 2 are symmetrically arranged on both sides of the inflatable boat body 1. Three sets of mounting devices 4 are arranged in a triangular shape on the lower end face of the inflatable boat body 1. A detachable propulsion device 5 is provided on one side of the mounting device 4. A connecting rope 7 is provided at the bottom end of the mounting device 4. A limiting rod 71 that can be inserted laterally into the bottom end of the mounting device 4 is provided at one end of the connecting rope 7. The limiting rod 71 fixes the propulsion device 5 to one side of the mounting device 4. Two rebounding locking blocks 72 are provided on both sides of one end of the limiting rod 71 for limiting. A mounting base traction device 3 is provided at the front end of the upper end face of the inflatable boat body 1. A control device 8 for controlling the lifeboat is installed on the top of the traction device 3.

[0029] In use, several mounting devices 4 are set on the lower end face of the inflatable boat body 1, so that the propulsion device 5 is installed on one side of the mounting device 4, and the mounting device 4 and the propulsion device 5 are fixed by the limiting rod 71. Then, a traction device 3 is set at the front end of the upper end face of the inflatable boat body 1, and the control device 8 is installed on the top of the traction device 3, so that the propulsion device 5 and the control device 8 can be quickly disassembled and installed from the inflatable boat body 1, making the inflatable lifeboat easier to store.

[0030] See Figure 5As shown, the installation device 4 includes a base 41 that is sealed and fixed to the lower end face of the inflatable boat body 1. A boss 42 is provided on one side of the base 41. A second limiting groove 43 for limiting is provided at the center of the inside of the boss 42. A first rectangular hole 44 for installing the limiting rod 71 is provided through both sides of the bottom end of the boss 42.

[0031] In use, the base 41 is fixed to the lower end face of the inflatable boat body 1, and the base 41 is arranged in a triangular shape. An installation groove is set at the center of the protrusion 42 on one side of the base 41. The first rectangular holes 44 are provided through the two sides of the bottom end of the protrusion 42, so that the limiting rod 71 can be inserted into the first rectangular hole 44. The locking block 72 set at one end of the limiting rod 71 is locked onto the outer surface of the protrusion 42, thereby fixing the propulsion device 5 to one side of the mounting device 4.

[0032] See Figure 4 and Figure 7 As shown, the propulsion device 5 includes a housing 51. A first limiting block 511 that can be installed inside the second limiting groove 43 is provided on one side of the housing 51. A second clearance groove 512 that can be adapted to the first rectangular hole 44 is provided through the bottom of the first limiting block 511.

[0033] In use, a first limiting block 511 is provided on the outside of the housing 51, and a second clearance groove 512 is provided through the bottom of the first limiting block 511, so that the housing 51 is inserted into the second limiting groove 43, and the second clearance groove 512 can be adapted to the first rectangular hole 44, so that the limiting rod 71 is inserted through the first rectangular hole 44 and the second clearance groove 512, thereby so that the first limiting block 511 is installed in the second limiting groove 43.

[0034] See Figure 4 and Figure 7 As shown, a rotary drive 52 is installed inside the bottom end of the housing 51. A propeller 53 capable of rotating to propel the lifeboat is installed outside the output end of the rotary drive 52. A fairing 54 is provided at the bottom end of the housing 51, and the top end of the fairing 54 is fixed by a first threaded sleeve 55. A rechargeable battery 56 is installed at the center inside the housing 51. A charging port 510 for charging is provided on one side of the top end of the housing 51. A lamp cover 57 is provided at the top end of the housing 51. A light bulb 59 is installed at the center inside the lamp cover 57, and the lamp cover 57 is fixed to the top end of the housing 51 by a second threaded sleeve 58.

[0035] In use, a rotary drive 52 is installed at the bottom inside the housing 51, which drives the propeller 53 at the output end to rotate at high speed, thereby causing the propulsion device 5 to move the inflatable lifeboat. A battery 56 is installed at the center inside the housing 51, and a charging port 510 is installed at one end outside the housing 51. The battery 56 can be charged by opening the charging port 510 and inserting a charger, so that the battery 56 can provide power to the inflatable lifeboat. A light bulb 59 is installed inside the lampshade 57. When the second threaded sleeve 58 installs the lampshade 57 at one end of the housing 51, the lampshade 57 is electrically connected to the battery 56, so that the lampshade 57 can emit light. This allows the inflatable lifeboat to meet the working environment with poor light at night and makes it easier to identify the rescue location.

[0036] See Figure 4 As shown, an inflation port 6 for inflation is provided on the upper end of the inflatable boat body 1 near the traction device 3, and a sealing plug 61 for sealing is installed at the top of the inflation port 6.

[0037] In use, an inflation port 6 is provided on the upper surface of the inflatable boat body 1 near the towing device 3, so that the interior of the inflatable boat body 1 is inflated through the inflation port 6. Then, the inflation port 6 is sealed by the sealing plug 61, which not only prevents the gas inside the inflatable boat body 1 from leaking out through the inflation port 6, but also prevents water from entering the interior of the inflatable boat body 1 through the inflation port 6, making it impossible to clean.

[0038] See Figure 8 As shown, the traction device 3 includes a fixed base 31 fixed to the upper surface of the inflatable boat body 1. A mounting bracket 32 ​​is fixed at the center of the upper surface of the fixed base 31 near the front end. A bolt 33 is installed inside the top of the mounting bracket 32. A first mounting seat 34 is provided at the center of the upper surface of the fixed base 31. A first clearance groove 35 is provided inside the front end of the first mounting seat 34. A buckle 36 is movably provided inside the first clearance groove 35. A push rod 37 is provided on one side of the bottom end of the buckle 36. One end of the push rod 37 extends out of the interior of the first mounting seat 34. A return spring 38 is provided on the other side of the bottom end of the buckle 36. The return spring 38 abuts against the inner wall of the first clearance groove 35.

[0039] In use, the fixed base 31 is fixed to the upper end face of the inflatable boat body 1, and a first mounting base 34 is set at the center of one side of the fixed base 31. A first clearance groove 35 is set inside the front end of the first mounting base 34, so that the buckle 36 can be movably installed inside the first clearance groove 35. At the same time, the push rod 37 set on one side of the buckle 36 can penetrate through the side wall of the first mounting base 34 and extend outward, so that pressing the push rod 37 will drive the buckle 36 to move horizontally. Then, the return spring 38 is installed on the other side of the bottom end of the buckle 36, and one end of the return spring 38 abuts against the inner wall of the first clearance groove 35, so that the return spring 38 pushes the buckle 36 to reset.

[0040] See Figure 8 As shown, an elliptical limiting boss 39 for limiting is provided at the center of the inclined surface at the center of the first mounting base 34, and semi-circular first limiting grooves 310 are symmetrically provided on both sides of the center of the inclined surface at the center of the first mounting base 34. A useful first slot 311 is provided at the end of the upper surface of the first mounting base 34. Two sets of abutment blocks 313 are symmetrically provided inside the first slot 311, and a rotatable threaded rod 312 is provided at the center of one side of the abutment block 313. One end of the threaded rod 312 can pass through the threaded rod 312 and extend outward.

[0041] In use, a protruding limiting boss 39 is provided at the center of the inclined surface at the center of the first mounting base 34, and first limiting grooves 310 are symmetrically provided at the center of both sides of the first mounting base 34. This allows the control device 8 to be mounted on the first mounting base 34 through the limiting boss 39 and the first limiting grooves 310, thus preventing the control device 8 from shaking. A horizontally movable abutment block 313 is provided inside the first slot 311, and a threaded rod 312 is provided on one side of the abutment block 313. When the nut outside the threaded rod 312 is rotated, the threaded rod 312 drives the abutment block 313 to move horizontally and press the control device 8 against it.

[0042] See Figure 10 As shown, the control device 8 includes a control boss 81, two sets of handles 88 for operating the lifeboat are symmetrically arranged on both sides of the control boss 81, and a second mounting seat 82 is provided at the bottom of the control boss 81 and is snapped onto the top of the towing device 3. A limiting frame 83 that can be adapted to the mounting frame 32 is provided at the center of the front end of the second mounting seat 82, and a second slot 84 for snapping onto the buckle 36 is provided inside the bottom front end of the second mounting seat 82. A third limiting groove 85 that can be adapted to the limiting boss 39 is provided at the center of the inclined surface at the bottom center of the second mounting seat 82, and a second limiting block 86 that can be installed inside the first limiting groove 310 is symmetrically arranged on both sides of the inclined surface at the bottom of the second mounting seat 82. Two sets of second rectangular holes 87 are symmetrically arranged at the front end of the second mounting seat 82.

[0043] In use, a third limiting groove 85 is provided at the center of the inclined surface at the bottom of the second mounting base 82, and second limiting blocks 86 that can be inserted into the first limiting groove 310 are symmetrically provided on both sides of the inclined surface. A second slot 84 is provided inside one end of the second mounting base 82, so that the buckle 36 is engaged in the second slot 84 to prevent the second mounting base 82 from shaking. A limiting frame 83 is provided at one end of the second mounting base 82, so that the limiting frame 83 is inserted into the mounting frame 32 and fixed by bolts 33. A second rectangular hole 87 is provided at the other end of the second mounting base 82, so that the abutment block 313 can be inserted into the second rectangular hole 87 and press the second mounting base 82 against it to prevent the second mounting base 82 from falling off the first mounting base 34.

[0044] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A detachable, powered, inflatable lifeboat, comprising an inflatable boat body (1), characterized in that, The inflatable boat body (1) is symmetrically provided with several elastic safety belts (2) on both sides, and the lower end face of the inflatable boat body (1) is provided with three sets of installation devices (4) in a triangular shape. One side of the installation device (4) is provided with a detachable propulsion device (5), and the bottom end of the installation device (4) is provided with a connecting rope (7). One end of the connecting rope (7) is provided with a limiting rod (71) that can be inserted laterally into the bottom end of the installation device (4), and the limiting rod (71) fixes the propulsion device (5) to one side of the installation device (4). Both sides of one end of the limiting rod (71) are provided with snap-back locking blocks (72) for limiting. The front end of the upper end face of the inflatable boat body (1) is provided with a mounting base traction device (3), and the top of the traction device (3) is provided with a control device (8) for controlling the lifeboat.

2. The detachable powered inflatable lifeboat according to claim 1, characterized in that, The installation device (4) includes a base (41) that is sealed and fixed to the lower end face of the inflatable boat body (1). A boss (42) is provided on one side of the base (41). A second limiting groove (43) for limiting is provided at the center of the inside of the boss (42). A first rectangular hole (44) for installing a limiting rod (71) is provided through both sides of the bottom end of the boss (42).

3. A detachable, powered, inflatable lifeboat according to claim 1, characterized in that, The propulsion device (5) includes a housing (51), and a first limiting block (511) is provided on one side of the housing (51) that can be installed inside the second limiting groove (43). A second clearance groove (512) that can be adapted to the first rectangular hole (44) is provided through the bottom of the first limiting block (511).

4. A detachable powered inflatable lifeboat according to claim 3, characterized in that, A rotary drive unit (52) is installed inside the bottom end of the housing (51). A propeller (53) capable of rotating to propel the lifeboat is installed outside the output end of the rotary drive unit (52). A fairing (54) is provided at the bottom end of the housing (51). The top end of the fairing (54) is fixed by a first threaded sleeve (55). A rechargeable battery (56) is installed at the center inside the housing (51). A charging port (510) for charging is provided on one side of the top end of the housing (51). A lampshade (57) is provided at the top end of the housing (51). A light bulb (59) is installed at the center inside the lampshade (57). The lampshade (57) is fixed to the top end of the housing (51) by a second threaded sleeve (58).

5. A detachable powered inflatable lifeboat according to claim 1, characterized in that, The inflatable boat body (1) has an inflation port (6) for inflation at one end of its upper surface near the traction device (3), and a sealing plug (61) for sealing is installed at the top of the inflation port (6).

6. A detachable powered inflatable lifeboat according to claim 1, characterized in that, The traction device (3) includes a fixed base (31) fixed to the upper end face of the inflatable boat body (1). A mounting bracket (32) is fixed at the center of the upper end face of the fixed base (31) near the front end. A bolt (33) is installed inside the top of the mounting bracket (32). A first mounting seat (34) is provided at the center of the upper end face of the fixed base (31). A first clearance groove (35) is provided inside the front end of the first mounting seat (34). A buckle (36) is movably provided inside the first clearance groove (35). A push rod (37) is provided on one side of the bottom end of the buckle (36). One end of the push rod (37) extends out of the interior of the first mounting seat (34). A return spring (38) is provided on the other side of the bottom end of the buckle (36). The return spring (38) abuts against the inner wall of the first clearance groove (35).

7. A detachable powered inflatable lifeboat according to claim 6, characterized in that, An elliptical limiting boss (39) for limiting is provided at the center of the inclined surface at the center of the first mounting base (34). Semi-circular first limiting grooves (310) are symmetrically provided on both sides of the center of the inclined surface at the center of the first mounting base (34). A useful first slot (311) is provided at the end of the upper surface of the first mounting base (34). Two sets of abutment blocks (313) are symmetrically provided inside the first slot (311). A rotatable threaded rod (312) is provided at the center of one side of the abutment block (313). One end of the threaded rod (312) can pass through the threaded rod (312) and extend outward.

8. A detachable powered inflatable lifeboat according to claim 1, characterized in that, The control device (8) includes a control boss (81), two sets of handles (88) for operating the lifeboat are symmetrically arranged on both sides of the control boss (81), and a second mounting seat (82) for engaging the top of the towing device (3) is provided at the bottom of the control boss (81). A limiting frame (83) that can be adapted to the mounting frame (32) is provided at the center of the front end of the second mounting seat (82), and a second slot (84) for engaging the buckle (36) is provided inside the bottom front end of the second mounting seat (82). A third limiting groove (85) that can be adapted to the limiting boss (39) is provided at the center of the inclined surface at the bottom center of the second mounting seat (82), and a second limiting block (86) that can be installed inside the first limiting groove (310) is symmetrically arranged on both sides of the inclined surface at the bottom of the second mounting seat (82). Two sets of second rectangular holes (87) are symmetrically arranged at the front end of the second mounting seat (82).

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