Automatic limiting device and method for high-speed amphibious vehicle land-water conversion

Abstract

The present invention discloses an automatic limit device and method for high-speed amphibious vehicle land-water conversion, the device comprises: a support, a micro hydraulic cylinder, a block, a rotating shaft, a reset spring assembly, etc. The micro hydraulic cylinder is fixed to the right end of the support, the block is rotatably connected to the lower end of the support through the rotating shaft, the rotating shaft runs through the lower end of the support, and the reset spring assembly is fixedly connected to the rotating shaft. The block rotates and unfolds under the thrust of the micro hydraulic cylinder to meet the needs of water conditions; the block rotates and resets under the elastic force of the reset spring assembly to meet the needs of land conditions. There is no need for the driver or other personnel to get off the vehicle to manually adjust the limiter, and the driver only needs to operate it in the cab, and the vehicle does not need to stop, which greatly improves the safety and practicality of battlefield personnel.

Description

Technical Field

[0001] The present invention relates to the technical field of high-speed amphibious vehicle motion systems, and in particular to an automatic limiting device and method for high-speed amphibious vehicle land-water conversion. Background Art

[0002] The high-speed amphibious vehicle motion system is equipped with a limiter. The main function of the limiter is: under land conditions, the limiter plays a limiting role, limiting the upward movement of the road wheel assembly, preventing the elastic elements such as the oil and gas spring from overloading to protect the elastic elements. Under water conditions, the road wheel assembly is lifted by actively filling the oil and gas spring, and the track is indirectly lifted, thereby reducing the water resistance generated by the motion system to the whole vehicle and increasing the water speed of the whole vehicle. In this process, the limiter plays a vital role in the ability of the road wheel assembly to be lifted and retracted to a certain height. Before retracting the road wheel assembly, it is necessary to adjust the limiter to the water state in advance so that the impact block of the road wheel assembly can just pass through the limiter, so that the road wheel assembly can be lifted and retracted to a certain height.

[0003] The technical state transition of the motion system is achieved through the key component of the limiter. The current existing vehicle limiter is a manually adjustable type. When switching between water and land conditions, the vehicle must first stop, and then the passengers need to get off the vehicle and manually adjust the limiter to meet the different requirements of water and land conditions. The main working principle of the existing manually adjustable limiter: when the vehicle is switched from land conditions to water conditions, it is necessary to manually operate the paddle to connect to the positioning pin on the support. At this time, the block rotates downward from the horizontal state to the vertical state around the axis, and the limiter is switched to the water state; when the vehicle is switched from water conditions to land conditions, it is necessary to manually disengage the paddle from the positioning pin, and the block rotates from the vertical state to the horizontal state around the axis under the action of the reset spring, and the limiter is switched to the land state.

[0004] The existing manually adjustable limit switches have technical shortcomings. In battlefield environments, the vehicle needs to be stopped and the driver and passengers are required to get off to perform manual adjustments, which seriously endangers the safety of the driver and passengers. It is urgent to optimize and upgrade the technical status and application of the existing limit switches. Summary of the invention

[0005] In view of this, the present invention provides an automatic limit device and method for land-water conversion of a high-speed amphibious vehicle, which can realize the function conversion of the land-water working condition limiter by one-key operation. The driver does not need to get off the vehicle to manually adjust the limiter, thereby improving the practicality on the battlefield.

[0006] The specific technical solution adopted in the present invention is as follows:

[0007] An automatic limit device for high-speed amphibious vehicle land-water conversion, comprising: a support, a micro hydraulic cylinder, a stopper, a rotating shaft and a return spring assembly;

[0008] The micro hydraulic cylinder is fixed to the right end of the support, the stopper is rotatably connected to the lower end of the support through the rotating shaft, the rotating shaft runs through the lower end of the support, and the reset spring assembly is fixedly connected to the rotating shaft;

[0009] The stopper rotates and expands under the thrust of the micro hydraulic cylinder to meet the needs of working conditions on water; the stopper rotates and resets under the elastic force of the reset spring assembly to meet the needs of working conditions on land.

[0010] Furthermore, the device also includes a contact switch assembly, which is arranged at the right end of the support. The contact switch assembly realizes switching of a switch alarm signal as the block rotates, and transmits the switch alarm signal to the cab.

[0011] Further, the return spring assembly includes a first return spring and a second return spring, the first return spring is arranged at the right end of the support and connected to the rotating shaft, and the second return spring is arranged at the lower end of the support and connected to the rotating shaft;

[0012] The first return spring and the second return spring enable the block to rotate and return to its original position through elastic force, and the first return spring also triggers the switching of the switch alarm signal through elastic force.

[0013] Furthermore, the device further comprises a paddle, wherein the paddle is arranged at the left end of the support, and an upper connecting hole and a lower connecting hole are respectively formed at two ends of the paddle;

[0014] When the vehicle is in land operation, the lower connecting hole is connected to the lower positioning pin at the left end of the block; when the vehicle is in water operation, the lower connecting hole is connected to the lower positioning pin, and at the same time the upper connecting hole is connected to the upper positioning pin at the left end of the support.

[0015] Furthermore, the support is also provided with a threaded mounting hole, a fixing plate and a pin hole;

[0016] The threaded mounting hole is used to fix the device on the vehicle body; the fixing plate is used to fix and install the micro hydraulic cylinder; and the pin hole is used to enable the rotating shaft to pass through the lower end of the support.

[0017] Further, the micro hydraulic cylinder includes an oil port and a piston rod;

[0018] The oil port provides thrust for the piston rod to extend outward by filling the micro hydraulic cylinder with oil; and the oil port stops providing thrust to the piston rod by draining the oil from the micro hydraulic cylinder.

[0019] Furthermore, a shaft hole is provided at the upper end of the stopper for passing the shaft through, so that the stopper is rotatably connected to the lower end of the support through the shaft.

[0020] Further, the contact switch assembly includes an upper contact switch, an upper contact, a lower contact switch and a lower contact; the upper contact switch is fixedly mounted on the fixing plate of the support, and the lower contact switch is fixedly mounted on the right end of the stopper;

[0021] When the vehicle is in the land operating condition, the upper contact of the upper contact switch contacts the vehicle body, triggering the land switch alarm signal and transmitting it to the cab;

[0022] When the vehicle is in the water working condition, the lower contact of the lower contact switch contacts the vehicle body, triggering the water switch alarm signal and transmitting it to the cab.

[0023] A method for automatically limiting the water-land conversion of a high-speed amphibious vehicle, using the above-mentioned device, comprises:

[0024] The working condition on land is switched to the working condition on water: the micro hydraulic cylinder is filled with oil through the oil port and pushes the piston rod to extend outward, the piston rod pushes the block to rotate 90 degrees around the rotating shaft to unfold, the lower contact switch rotates 90 degrees together with the block, the lower contact of the lower contact switch contacts the vehicle body, triggering the alarm signal of the water switch and transmitting it to the cab; the block is kept in the unfolded state, and the vehicle is in the working condition on water;

[0025] The working condition on water is switched to the working condition on land: the micro hydraulic cylinder releases oil through the oil port and stops providing thrust to the piston rod. The block rotates and resets under the elastic force of the reset spring assembly. The upper contact of the upper contact switch contacts the vehicle body, triggering the alarm signal of the land switch and transmitting it to the cab. The vehicle is in the working condition on land.

[0026] Furthermore, the method also includes: when the micro hydraulic cylinder cannot automatically complete oil filling and oil draining, the vehicle is placed in a water working condition by connecting the lower connecting hole of the paddle and the lower positioning pin of the block, and connecting the upper connecting hole of the paddle and the upper positioning pin of the support; the vehicle is placed in a land working condition by connecting the lower connecting hole of the paddle and the lower positioning pin of the block, and disconnecting the upper connecting hole of the paddle and the upper positioning pin of the support.

[0027] Beneficial effects:

[0028] (1) The present invention provides an automatic limit device for the land-water conversion of a high-speed amphibious vehicle, comprising: a support, a micro hydraulic cylinder, a stopper, a rotating shaft, a reset spring assembly, etc. The stopper rotates and expands under the thrust of the micro hydraulic cylinder to meet the needs of working conditions on water; the stopper rotates and resets under the elastic force of the reset spring assembly to meet the needs of working conditions on land. There is no need for the driver or other personnel to get off the vehicle to manually adjust the limiter. The driver only needs to operate it in the cab, and the vehicle does not need to be parked, which greatly improves the safety and practicality of battlefield personnel.

[0029] (2) A contact switch assembly is provided. The contact switch assembly switches the switch alarm signal as the stopper rotates, and transmits the switch alarm signal to the cab. The driver in the cab can timely understand the switching status of the land working condition and the water working condition.

[0030] (3) A paddle is provided to achieve automatic limit through components such as a micro hydraulic cylinder while retaining the traditional manual limit function, thereby preventing the problem of being unable to achieve limit in the event of failure of the micro hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is the structural principle diagram of the existing vehicle motion system for onshore working conditions;

[0032] Figure 2 It is a schematic diagram of the collision between the existing road wheel assembly and the limiter under land working conditions;

[0033] Figure 3 It is the structural principle diagram of the existing vehicle motion system under water working conditions;

[0034] Figure 4 It is a schematic diagram of the collision between the existing road wheel assembly and the limiter in the water working condition;

[0035] Figure 5 It is a structural schematic diagram of the existing manual limiter for onshore working conditions;

[0036] Figure 6 It is a structural schematic diagram of the existing manual limiter for water working conditions;

[0037] Figure 7 A structural block diagram of the automatic limit device provided by the present invention in a land working condition;

[0038] Figure 8 A structural block diagram of the automatic limit device provided by the present invention in a water working condition;

[0039] Fig. 9 A schematic diagram of the structure disassembly of the automatic limit device provided by the present invention;

[0040] Fig.10A structural block diagram of a support for the automatic limit device provided by the present invention;

[0041] Fig.11 A schematic structural diagram of a paddle of the automatic limit device provided by the present invention;

[0042] Fig.12 A schematic diagram of the structure of a stopper of the automatic limit device provided by the present invention;

[0043] Fig.13 A structural block diagram of a micro hydraulic cylinder of an automatic limiting device provided by the present invention;

[0044] Fig.14 A schematic diagram of the structure of a contact switch assembly of the automatic limit device provided by the present invention;

[0045] Fig.15 A hydraulic principle diagram of the automatic limit device provided by the present invention;

[0046] Fig.16 A schematic diagram of the working process of the automatic limit device provided by the present invention;

[0047] Among them, 1-support, 101-threaded mounting hole, 102-upper positioning pin, 103-fixed plate, 104-pin hole, 2-micro hydraulic cylinder, 201-oil port, 202-piston rod, 3-paddle, 301-upper connecting hole, 302-lower connecting hole, 4-stopper, 401-lower positioning pin, 402-rotating shaft hole, 5-rotating shaft, 6-first return spring, 7-second return spring, 8-upper contact switch, 801-upper contact, 9-lower contact switch, 901-lower contact, 51-support, 52-positioning pin, 53-return spring, 54-paddle, 55-positioning hole, 56-stopper, 57-rotating shaft. DETAILED DESCRIPTION

[0048] The present invention provides an automatic limit device and method for high-speed amphibious vehicle land-water conversion, the device includes: a support, a micro hydraulic cylinder, a stopper, a rotating shaft, a reset spring assembly, etc. The micro hydraulic cylinder is fixed to the right end of the support, the stopper is rotatably connected to the lower end of the support through the rotating shaft, the rotating shaft runs through the lower end of the support, and the reset spring assembly is fixedly connected to the rotating shaft. The stopper rotates and unfolds under the thrust of the micro hydraulic cylinder to meet the needs of water conditions; the stopper rotates and resets under the elastic force of the reset spring assembly to meet the needs of land conditions. There is no need for the driver or other personnel to get off the vehicle to manually adjust the limiter, and the driver only needs to operate it in the cab, and the vehicle does not need to stop, which greatly improves the safety and practicality of battlefield personnel.

[0049] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0050] Figure 1This is the structural schematic diagram of the existing vehicle motion system for onshore working conditions. Figure 2 The figure is a schematic diagram of the collision between the existing road wheel assembly and the limiter under the existing land working condition. Figure 1 As shown, under onshore working conditions, the limiter plays a limiting role, limiting the upward jumping stroke of the road wheel assembly, preventing elastic elements such as oil and gas springs from overloading to protect the elastic elements.

[0051] Figure 3 This is the structural principle diagram of the existing vehicle motion system under water working conditions. Figure 4 The figure is a schematic diagram of the collision between the existing road wheel assembly and the limiter under water working conditions. Figure 3 As shown in the figure, under water working conditions, the road wheel assembly is lifted by actively filling the oil-gas spring, and the track is indirectly lifted, thereby reducing the water resistance generated by the action system on the whole vehicle and increasing the water speed of the whole vehicle. In this process, the limiter plays a vital role in the ability of the road wheel assembly to be lifted and retracted to a certain height. Before retracting the road wheel assembly, the limiter needs to be adjusted to the water state in advance so that the impact block of the road wheel assembly can just pass through the limiter, so that the road wheel assembly can be lifted and retracted to a certain height.

[0052] Figure 5 The schematic diagram of the structure of the existing manual limiter for onshore working conditions is shown in FIG. Figure 5 As shown, when the vehicle switches from the water working condition to the land working condition, it is necessary to manually disengage the paddle 54 from the positioning pin 52, and the block 56 rotates from the vertical state to the horizontal state around the rotating shaft 57 under the action of the return spring 53, and the limit switch is switched to the land state. Figure 6 The schematic diagram of the structure of the existing manual limiter for water working conditions is as follows: Figure 6 As shown, when the vehicle switches from land working condition to water working condition, it is necessary to manually operate the paddle to connect to the positioning pin on the support. At this time, the block rotates downward around the axis from the horizontal state to the vertical state, and the limit switch is switched to the water state.

[0053] However, in battlefield environments, the vehicle needs to be parked and the driver and passengers are required to get off the vehicle to make manual adjustments, which seriously endangers the safety of the driver and passengers. In response to the above problems, the present invention proposes an automatic limiter device for water-land conversion of high-speed amphibious vehicles. The device is optimized and improved on the basis of maintaining the existing limiter function, and a micro-hydraulic cylinder hydraulic control device is added. The switch of the limiter block is achieved through the active oil filling and pressure building and oil release and pressure relief of the micro-hydraulic cylinder. The driver can realize the function conversion of the water-land working condition limiter with one-button control, and the driver does not need to get off the vehicle to manually adjust the limiter, which greatly improves the practicality of the battlefield.

[0054] Figure 7 The automatic limit device provided by the present invention is a structural block diagram in the onshore working condition, such as Figure 7As shown, the device includes: a support 1, a micro hydraulic cylinder 2, a stopper 4, a rotating shaft 5 and a reset spring assembly. The micro hydraulic cylinder 2 is fixed to the right end of the support 1, the stopper 4 is rotatably connected to the lower end of the support 1 through the rotating shaft 5, the rotating shaft 5 passes through the lower end of the support 1, and the reset spring assembly is fixedly connected to the rotating shaft 5.

[0055] The stopper 4 rotates and expands under the thrust of the micro hydraulic cylinder 2 to meet the needs of working conditions on water; the stopper 4 rotates and resets under the elastic force of the reset spring assembly to meet the needs of working conditions on land.

[0056] Figure 8 The automatic limit device provided by the present invention is a structural block diagram in the water working condition, such as Figure 8 As shown, the stopper 4 is in a state of being rotated downward and unfolded. Fig. 9 This is a schematic diagram of the structure disassembly of the automatic limit device provided by the present invention.

[0057] In a specific embodiment, the automatic limit device provided by the present invention also includes a contact switch assembly, which is arranged at the right end of the support 1. The contact switch assembly realizes the switching of the switch alarm signal as the block 4 rotates, and transmits the switch alarm signal to the cab.

[0058] In a specific embodiment, if Figure 8 As shown, the contact switch assembly includes an upper contact switch 8 and a lower contact switch 9 , the upper contact switch 8 is fixedly mounted on the support 1 , and the lower contact switch 9 is fixedly mounted on the right end of the stopper 4 .

[0059] In a specific embodiment, Fig.14 A schematic diagram of the contact switch assembly structure of the automatic limit device provided by the present invention is shown in FIG. Fig.14 As shown, the upper contact switch 8 is provided with an upper contact 801 , and the lower contact switch 9 is provided with a lower contact 901 .

[0060] In a specific embodiment, if Figure 7 As shown, the return spring assembly includes a first return spring 6 and a second return spring 7. The first return spring 6 is arranged at the right end of the support 1 and connected to the rotating shaft 5, and the second return spring 7 is arranged at the lower end of the support 1 and connected to the rotating shaft 5; the first return spring 6 and the second return spring 7 rotate and return the stopper 4 through the elastic force, and the first return spring 6 also triggers the switch alarm signal switching through the elastic force.

[0061] In a specific embodiment, the automatic limiting device provided by the present invention further includes a paddle 3 , wherein the paddle 3 is arranged at the left end of the support 1 . Fig.11 A schematic diagram of the structure of the paddle of the automatic limit device provided by the present invention, as shown in Fig.11 As shown, an upper connection hole 301 and a lower connection hole 302 are respectively formed at two ends of the paddle 3 .

[0062] When the vehicle is in land operation, the lower connection hole 302 is connected to the lower positioning pin 401 at the left end of the block 4; when the vehicle is in water operation, the lower connection hole 302 is connected to the lower positioning pin 401, and at the same time the upper connection hole 301 is connected to the upper positioning pin 102 at the left end of the support 1.

[0063] In a specific embodiment, Fig.10 The structural block diagram of the support of the automatic limit device provided by the present invention is as follows: Fig.10 As shown, the support 1 is also provided with a threaded mounting hole 101, a fixing plate 103 and a pin hole 104. The threaded mounting hole 101 is used to fix the device on the vehicle body; the fixing plate 103 is used to fix the micro hydraulic cylinder 2; and the pin hole 104 is used to realize that the rotating shaft 5 passes through the lower end of the support 1.

[0064] In a specific embodiment, Fig.13 The structural block diagram of the micro hydraulic cylinder of the automatic limit device provided by the present invention is as follows: Fig.13 As shown, the micro hydraulic cylinder 2 includes an oil port 201 and a piston rod 202. The oil port 201 provides thrust for the piston rod 202 to extend outward by filling the micro hydraulic cylinder 2 with oil; the oil port 201 stops providing thrust to the piston rod 202 by draining the micro hydraulic cylinder 2.

[0065] In a specific embodiment, Fig.12 A schematic diagram of the structure of the stopper of the automatic limit device provided by the present invention, as shown in Fig.12 As shown, a shaft hole 402 is also provided at the upper end of the stopper 4 for passing the shaft 5 , so that the stopper 4 is rotatably connected to the lower end of the support 1 through the shaft 5 .

[0066] According to the above embodiment, the automatic limiting device provided by the present invention is composed of a support 1, a micro hydraulic cylinder 2, a paddle 3, a block 4, a rotating shaft 5, a first return spring 6, a second return spring 7, an upper contact switch 8, a lower contact switch 9, etc.

[0067] Four threaded mounting holes 101 are designed on the support 1 for fixing the limiter on the vehicle body; the micro hydraulic cylinder 2 is fixedly mounted on the fixing plate 103, and the piston rod 202 can be extended or retracted by filling and discharging oil in the oil port 201; the upper connecting hole 301 of the paddle 3 is matched with the upper positioning pin 102, and the lower connecting hole 302 on the paddle 3 is matched with the lower positioning pin 401 on the stopper 4; the shaft hole 402 on the stopper 4 is aligned with the pin hole 104 on the support 1, and the shaft 5 passes through the shaft hole 4 02 and pin hole 104, the block 4 is fixed together with the support 1 through the rotating shaft 5, and rotates relatively around the support 1 through the rotating shaft 5; the first return spring 6 and the second return spring 7 are used to provide spring force to realize the rapid rebound and reset of the block 4; the upper contact switch 8 is installed and fixed on the fixed plate 103 on the support 1, and the upper contact 801 is used to prompt the driver to switch to the land working condition; the lower contact switch 9 is installed and fixed on the block 4, and the lower contact 901 is used to prompt the driver to switch to the water working condition.

[0068] The present invention also provides a method for automatically limiting the water-land conversion of a high-speed amphibious vehicle, using the above-mentioned automatic limiting device, including:

[0069] The land working condition is switched to the water working condition: the micro hydraulic cylinder 2 is filled with oil through the oil port 201 and pushes the piston rod 202 to extend, the piston rod 202 pushes the block 4 to rotate 90 degrees around the rotating shaft 5 to unfold, the lower contact switch 9 rotates 90 degrees together with the block 4, and the lower contact 901 of the lower contact switch 9 contacts the vehicle body, triggering the water switch alarm signal and transmitting it to the cab; keep the block 4 in the unfolded state, and the vehicle is in the water working condition.

[0070] The working condition on water is switched to the working condition on land: the micro hydraulic cylinder 2 releases oil through the oil port 201 and stops providing thrust to the piston rod 202. The block 4 rotates and resets under the elastic force of the reset spring assembly. The upper contact 801 of the upper contact switch 8 contacts the vehicle body, triggering the alarm signal of the land switch and transmitting it to the cab. The vehicle is in the working condition on land.

[0071] In a specific embodiment, the method also includes: when the micro hydraulic cylinder 2 cannot automatically complete the filling and draining of oil, by connecting the lower connecting hole 302 of the paddle 3 and the lower positioning pin 401 of the block 4, and connecting the upper connecting hole 301 of the paddle 3 and the upper positioning pin 102 of the support 1, the vehicle is placed in a water working condition; by connecting the lower connecting hole 302 of the paddle 3 and the lower positioning pin 401 of the block 4, and disconnecting the upper connecting hole 301 of the paddle 3 and the upper positioning pin 102 of the support 1, the vehicle is placed in a land working condition.

[0072] In a specific embodiment, the automatic hydraulic limiter requires the hydraulic system to provide pressure oil, and an automatic hydraulic limiter control oil circuit can be added on the basis of the existing vehicle hydraulic system. Fig.15 The hydraulic principle diagram of the automatic limit device provided by the present invention is as follows: Fig.15 As shown, it is mainly composed of a water-land switching electromagnetic reversing valve and pipelines, etc., among which the pipeline can use a pressure measuring line to ensure high pressure resistance and reduce weight.

[0073] Fig.16 The working principle diagram of the automatic limit device provided by the present invention is as follows: Fig.16 As shown,

[0074] (1) Automatic limiter changes from land working condition to water working condition

[0075] The specific working mechanism of the automatic limiter is as follows: the driver operates the limiter switch button with one key, the controller outputs a command to start the hydraulic oil source, and the water-land conversion electromagnetic reversing valve is energized. The pressure oil enters the micro hydraulic cylinder 2 through the oil port 201 and pushes out the piston rod 202. The piston rod 202 gradually extends outward and pushes the lower pressure block 4. The block 4 rotates 90 degrees relative to the support 1 around the rotating shaft 5 to the maximum opening. At this time, the lower contact switch 9 fixed on the block 4 also rotates 90 degrees. The lower contact 901 on the lower contact switch 9 touches the vehicle body and triggers an alarm signal, and transmits the alarm signal to the cab alarm light through the control system to remind the driver that it has switched to the water working condition. At this time, the hydraulic system cannot be turned off to ensure that there is a certain pressure in the micro hydraulic cylinder 2. Under the action of the pressure oil in the micro hydraulic cylinder 2, the block 4 is stabilized at a 90-degree angle, and then the water wheel lifting function of the road wheel assembly of the action system is executed to ensure that the impact block on the road wheel assembly passes the limiter smoothly.

[0076] (2) Automatic limiter switches from water working condition to land working condition

[0077] The specific working mechanism of the automatic limiter is: the driver operates the limiter switch button with one click to turn off the hydraulic system, the oil pump stops supplying oil, and the pressure oil in the micro hydraulic cylinder 2 is discharged into the hydraulic oil tank through the oil port 201. The micro hydraulic cylinder 2 is at zero pressure, and then the block 4 is rapidly rotated around the rotating shaft 5 relative to the support 1 under the joint action of the return spring force of the first return spring 6 and the second return spring 7, and flipped upward 90 degrees to the initial position. At this time, the upper contact 801 of the upper contact switch 8 contacts the vehicle body and triggers an alarm signal (the upper contact switch 8 can also be fixedly installed on the block 4. The upper contact switch 8 also rotates 90 degrees, and the upper contact 801 of the upper contact switch 8 touches the support 1 and triggers the alarm signal), and the alarm signal is transmitted to the cab alarm light through the control system. At this point, the automatic limiter completes the conversion from water working conditions to land working conditions.

[0078] In addition, the paddle 3 is used to realize the manual adjustment function of the limiter, and the manual adjustment function of the original limiter is retained. Under normal conditions, the lower connection hole 302 on the paddle 3 is connected and installed with the lower positioning pin 401. When the automatic function of the limiter fails, the upper connection hole 301 on the paddle 3 is connected with the upper positioning pin 102 of the support 1, and the limiter can also complete the water working mode.

[0079] In summary, this invention provides an automatic limiter device and method for high-speed amphibious vehicle land-water conversion, which realizes the one-button automatic switching of the land-water working mode of the action system limiter, which only needs the driver to operate in the cab, without the need to stop the vehicle, and without the need for the driver or other personnel to get off the vehicle to manually adjust the limiter, which greatly improves the safety and practicality of battlefield personnel. In addition, the automatic limiter still retains the manual adjustment function, and when the automatic switching function is lost, the manual adjustment function can be used.

[0080] The above specific embodiments only describe the design principle of the present invention. The shapes and names of the components in the description may be different and are not limited. Therefore, those skilled in the art in the field of the present invention may modify or replace the technical solutions recorded in the above embodiments; and these modifications and replacements do not deviate from the creative purpose and technical solutions of the present invention and should all fall within the protection scope of the present invention.

Claims

1. An automatic limiter for high-speed amphibious vehicle land-water conversion, characterized in that: include: A support (1), a micro hydraulic cylinder (2), a stopper (4), a rotating shaft (5) and a return spring assembly; The micro hydraulic cylinder (2) is fixed to the right end of the support (1), the stopper (4) is rotatably connected to the lower end of the support (1) via the rotating shaft (5), the rotating shaft (5) passes through the lower end of the support (1), and the return spring assembly is fixedly connected to the rotating shaft (5); The stopper (4) rotates and expands under the thrust of the micro hydraulic cylinder (2), thereby meeting the requirements of working conditions on water; the stopper (4) rotates and resets under the elastic force of the reset spring assembly, thereby meeting the requirements of working conditions on land. The device further comprises a contact switch assembly, wherein the contact switch assembly is arranged at the right end of the support (1), and the contact switch assembly switches a switch alarm signal as the stopper (4) rotates, and transmits the switch alarm signal to the cab; The return spring assembly comprises a first return spring (6) and a second return spring (7), wherein the first return spring (6) is arranged at the right end of the support (1) and connected to the rotating shaft (5), and the second return spring (7) is arranged at the lower end of the support (1) and connected to the rotating shaft (5); The first return spring (6) and the second return spring (7) cause the stopper (4) to rotate and return to its original position through the elastic force, and the first return spring (6) also triggers the switching of the switch alarm signal through the elastic force; The device further comprises a paddle (3), wherein the paddle (3) is arranged at the left end of the support (1), and an upper connecting hole (301) and a lower connecting hole (302) are respectively formed at two ends of the paddle (3); When the vehicle is in a land operation state, the lower connection hole (302) is connected to the lower positioning pin (401) at the left end of the stopper (4); when the vehicle is in a water operation state, the lower connection hole (302) is connected to the lower positioning pin (401), and at the same time, the upper connection hole (301) is connected to the upper positioning pin (102) at the left end of the support (1).

2. The device according to claim 1, characterized in that The support (1) is also provided with a threaded mounting hole (101), a fixing plate (103) and a pin hole (104); The threaded mounting hole (101) is used to fix the device on a vehicle body; the fixing plate (103) is used to fix the micro hydraulic cylinder (2); and the pin hole (104) is used to enable the rotating shaft (5) to penetrate the lower end of the support (1).

3. The device according to claim 1, characterized in that The micro hydraulic cylinder (2) comprises an oil port (201) and a piston rod (202); The oil port (201) provides thrust for the piston rod (202) to extend outward by filling the micro hydraulic cylinder (2) with oil; and the oil port (201) stops providing thrust to the piston rod (202) by draining oil from the micro hydraulic cylinder (2).

4. The device according to claim 1, characterized in that The upper end of the stopper (4) is also provided with a rotating shaft hole (402) for passing through the rotating shaft (5) so as to realize the rotation connection between the stopper (4) and the lower end of the support (1) via the rotating shaft (5).

5. The device according to claim 1, characterized in that The contact switch assembly comprises an upper contact switch (8), an upper contact (801), a lower contact switch (9) and a lower contact (901); the upper contact switch (8) is fixedly mounted on a fixing plate (103) of the support (1), and the lower contact switch (9) is fixedly mounted on the right end of the stopper (4); When the vehicle is in a land-based operating condition, the upper contact (801) of the upper contact switch (8) contacts the vehicle body, triggering an on-land switch alarm signal and transmitting it to the cab; When the vehicle is in a water operating condition, the lower contact (901) of the lower contact switch (9) contacts the vehicle body, triggering an on-water switch alarm signal and transmitting it to the cab.

6. A method for automatically limiting the water-land conversion of a high-speed amphibious vehicle, using the device described in any one of claims 1 to 5, characterized in that: include: The onshore working condition is switched to the onshore working condition: the micro hydraulic cylinder (2) is filled with oil through the oil port (201) and pushes the piston rod (202) to extend outward, the piston rod (202) pushes the block (4) to rotate 90 degrees around the rotating shaft (5) to unfold, the lower contact switch (9) rotates 90 degrees together with the block (4), the lower contact (901) of the lower contact switch (9) contacts the vehicle body, triggering an onshore switch alarm signal and transmitting it to the cab; the block (4) is kept in the unfolded state, and the vehicle is in the onshore working condition; The working condition on water is switched to the working condition on land: the micro hydraulic cylinder (2) releases oil through the oil port (201), stops providing thrust to the piston rod (202), the block (4) rotates and resets under the elastic force of the reset spring assembly, the upper contact (801) of the upper contact switch (8) contacts the vehicle body, triggers the alarm signal of the land switch and transmits it to the cab, and the vehicle is in the working condition on land; The method further comprises: When the micro hydraulic cylinder (2) cannot automatically complete oil filling and oil discharge, the vehicle is placed in a water working condition by connecting the lower connecting hole (302) of the paddle (3) and the lower positioning pin (401) of the block (4), and connecting the upper connecting hole (301) of the paddle (3) and the upper positioning pin (102) of the support (1); the vehicle is placed in a land working condition by connecting the lower connecting hole (302) of the paddle (3) and the lower positioning pin (401) of the block (4), and disconnecting the upper connecting hole (301) of the paddle (3) and the upper positioning pin (102) of the support (1).

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