Special equipment steering system and special equipment

Abstract

The present invention relates to a special equipment steering system and special equipment. The special equipment steering system includes a main channel housing, wherein a rudder blade and a rotating shaft are rotatably mounted therein. The rudder blade is fixed to the rotating shaft, and at least one end of each rotating shaft is an outlet end. The special equipment steering system also includes a tiller, which has a first end and a second end. The first end is fixedly connected to the outlet end, and a connecting rod is hinged between the second ends of two adjacent tillers to form a parallelogram mechanism. The special equipment steering system also includes a drive mechanism for driving each rotating shaft to rotate. The drive mechanism includes a push-pull rod and a drive structure for driving the push-pull rod to move in translation. One end of the push-pull rod is hinged to one of the tillers, and the distance between the hinge axis of the push-pull rod and the tiller and the axis of the rotating shaft corresponding to the tiller is greater than or equal to 1 / 2 of the length of the tiller. The present invention effectively solves the problem in the prior art that the electric drive component is directly connected to the rotation transmission, resulting in difficulty in driving the rotating shaft to rotate.

Description

Technical Field

[0001] The present invention relates to a special equipment steering system and special equipment, belonging to the technical field of special equipment. Background Art

[0002] Amphibious vehicles, also known as "amphibious vehicles," combine the capabilities of both vehicles and boats, possessing the functions of both. They are specialized equipment capable of traveling on land like a car and on water like a boat. Their exceptional ability to navigate both land and water makes them particularly useful for transporting supplies, particularly in military operations, disaster relief, and short-distance transportation of goods without docks.

[0003] Currently, domestic medium- and high-speed amphibious vehicles are typically equipped with a water jet at the rear of their bodies, and their travel on water is achieved through water jet propulsion. To achieve steering and reversing while traveling on water, amphibious vehicles are typically equipped with a steering system that changes the direction of the water jets. An example of a steering system is disclosed in Chinese invention patent application publication number CN112590475A, which describes an electric steering mechanism for an amphibious vehicle. The steering mechanism includes a main channel located at the water jet outlet, with three rudder blades disposed within the main channel. Each rudder blade is rotatably mounted within the main channel via its own rotating shaft. The steering mechanism also includes three tillers, with the upper end of each rudder blade's rotating shaft extending upwardly out of the main channel. One end of each of the three tillers is fixedly connected to the upper end of the corresponding rotating shaft, and a tie rod is hinged between the other ends of any two adjacent tillers to form a parallelogram structure.

[0004] The steering structure also includes an electric drive component that is in transmission connection with the upper end of one of the rotating shafts. The electric drive component drives the rotating shaft to rotate. The rotation of the rotating shaft drives the parallelogram mechanism, which in turn drives the rotating shafts to rotate synchronously to adjust the rotation angles of the rudder blades. Adjusting the rotation angles of the rudder blades can change the direction of the water flow ejected by the water jet propulsion system, thereby achieving vehicle steering. In addition, the main channel is provided with a left flow channel and a right flow channel on the left and right sides, respectively, communicating with the main channel. The water inlets of the left and right flow channels are respectively located on the left and right side walls of the main channel, and the water outlets of the left and right flow channels are respectively located on the left and right sides of the vehicle body. When the rudder blades are driven to rotate and close the main channel, the water ejected from the water jet propulsion system flows through the left and right flow channels and is ejected forward, achieving vehicle reversing.

[0005] However, in the steering structure of the above patent document, since the electric drive component is directly connected to the rotating shaft of the rudder blade, the force arm between the output end of the electric drive component and the rotating shaft is small or even zero, so it is more difficult to drive the rotating shaft to rotate. Summary of the Invention

[0006] The purpose of the present invention is to provide a special equipment steering system to solve the problem in the prior art that when the electric drive component is directly connected to the rotary transmission, it causes difficulty in rotating the drive shaft; the purpose of the present invention is also to provide a special equipment to solve the above problem.

[0007] To achieve the above objectives, the special equipment steering system of the present invention adopts the following technical solutions:

[0008] A special equipment steering system includes a main channel housing for being arranged at the water outlet of a water jet propulsion device of the special equipment, at least two rudder blades arranged in the left-right direction are provided in the main channel housing, a plurality of rotating shafts corresponding to the rudder blades and with axes extending in the up-down direction are rotatably installed in the main channel housing, each rudder blade is fixed to the corresponding rotating shaft, and at least one end of each rotating shaft is an exit end passing through the main channel housing; the special equipment steering system also includes a plurality of tillers corresponding to the rotating shafts, each tiller having a first end and a second end, the first end being non-rotatably connected to the exit end of the corresponding rotating shaft, and a connecting rod being hinged between the second ends of two adjacent tillers to form a parallelogram mechanism; the special equipment steering system also includes a driving mechanism for driving the rotation of each rotating shaft, the driving mechanism including a push-pull rod and a driving structure for driving the push-pull rod to move in translation, one end of the push-pull rod being hinged to one of the tillers, and the distance between the hinge axis of the push-pull rod and the tiller to the axis of the rotating shaft corresponding to the tiller is greater than or equal to 1 / 2 of the length of the tiller.

[0009] The beneficial effect of the above technical solution is that: in the special equipment steering system of the present invention, since the driving mechanism includes a push-pull rod and a driving structure for driving the push-pull rod to move in translation, and since the push-pull rod is hinged to one of the tiller handles, and the distance between the hinge axis of the push-pull rod and the tiller handle and the axis of the rotating shaft corresponding to the tiller handle is greater than or equal to 1 / 2 of the length of the tiller handle, the distance between the force application point of the push-pull rod on the tiller handle and the corresponding rotating shaft axis is greater than or equal to 1 / 2 of the length of the tiller handle, that is, when the rotating shaft is driven to rotate, the force arm between the thrust rod and the rotating shaft is greater than or equal to 1 / 2 of the length of the tiller handle. Therefore, compared with the prior art in which the driving component is directly connected to the rotating shaft transmission, the present invention increases the size of the force arm when the driving mechanism drives the rotating shaft to rotate, so that it can save more effort when driving the rotating shaft.

[0010] Furthermore, the push-pull rod is hinged to the second end of the tiller handle.

[0011] The beneficial effect of the above technical solution is that it further increases the distance between the hinge axis of the push-pull rod and the tiller and the corresponding shaft axis, that is, it further increases the force arm size when the driving shaft rotates, making the rotation of the driving shaft more labor-saving.

[0012] Furthermore, the tiller handle includes two connecting plates arranged in sequence along the up and down directions, the connecting rod is hinged to the two connecting plates and is located between the two connecting plates, and the special equipment steering system also includes an articulated shaft, which passes through the two connecting plates, the connecting rod and the push-pull rod along the up and down directions.

[0013] The beneficial effect of the above technical solution is that the tiller is set as a structure of two connecting plates, so that when the tiller, the connecting rod and the push-pull rod are hinged on the second end together, the hinge axis facilitates the hinge connection between the tiller, the connecting rod and the push-pull rod.

[0014] Furthermore, the hinge shaft is a bolt.

[0015] The beneficial effect of the above technical solution is that: the bolts can not only realize the hinge between the tiller, the connecting rod and the push-pull rod, but also the bolts can further facilitate the connection and fixation between the tiller, the connecting rod and the push-pull rod through the threaded cooperation with the nut, thereby ensuring the connection effect between the three.

[0016] Furthermore, the tiller includes two connecting plates arranged in sequence along the up-down direction, and the connecting rod is hinged to the two connecting plates and is located between the two connecting plates.

[0017] The beneficial effect of the above technical solution is that it not only avoids interference between the pull rod and other components by hingedly connecting the pull rod between the two connecting plates, but also facilitates the processing and manufacturing of the tiller handle to a certain extent while ensuring that the tiller handle has high strength by setting the tiller handle into a structure of two connecting plates.

[0018] Furthermore, the driving mechanism is a horizontally arranged hydraulic cylinder, the hydraulic cylinder includes a cylinder body and a piston rod slidably assembled in the cylinder body, and the push-pull rod is composed of the piston rod.

[0019] The beneficial effect of the above technical solution is that the driving mechanism is set as a hydraulic cylinder, which not only can form a push-pull rod through the piston rod, but also simplifies the structure of the driving mechanism. In addition, the horizontally arranged hydraulic cylinder can also reduce the space occupied by the driving mechanism in the vertical direction, facilitating the arrangement of the driving mechanism.

[0020] Furthermore, the end of the cylinder body is connected to a mounting seat, and the mounting seat is used to be fixed on the frame longitudinal beam of the special equipment.

[0021] The beneficial effects of the above technical solution are: the fixed installation of the cylinder body is facilitated by the mounting seat, and the installation and fixation of the cylinder body on the vehicle body is facilitated by fixing the mounting seat on the frame longitudinal beam, while also ensuring the installation and fixation strength of the cylinder body to a certain extent.

[0022] Furthermore, the push-pull rod is hingedly connected to the tiller farthest from the cylinder body.

[0023] The beneficial effect of the above technical solution is that it does not limit the selection of cylinder size to a certain extent. At the same time, when a large cylinder is selected, it can also have greater force to drive the shaft to rotate, making it easier to drive the shaft to rotate.

[0024] Furthermore, the main channel shell includes two side plates arranged on the left and right and a bottom plate and a top plate arranged in parallel up and down, each side plate includes a vertical plate and an inclined plate arranged in sequence from front to back, the vertical plates of the two side plates are parallel and arranged vertically, and the inclined plates of the two side plates are inclined outward from front to back; each of the rudder blades is located in the space surrounded by the top plate, the bottom plate and the two inclined plates, the axis of each rotating shaft is coplanar with the transition line of the vertical plate and the inclined plate in each side plate, and the total width of each rudder blade is greater than the spacing between the two vertical plates.

[0025] The beneficial effect of the above technical solution is that the inclined plate is tilted outward from front to back, and since each rudder blade is located in the space surrounded by the top plate, the bottom plate and the two inclined plates, the axis of each rotating shaft is coplanar with the transition line between the vertical plate and the inclined plate in the same side plate. In this way, when the rudder blade rotates to a certain angle, compared with the structure in which the side plates are all vertical plates, the cooperation between the rudder blade and the inclined plate can increase the angle between the rear end of the side plate and the rudder blade, and then when the water flows out from between the rudder blade and the side plate, the pressure of the water flow between the rear end of the side plate and the rudder blade can be reduced, that is, it is convenient for the water to flow out from between the rudder blade and the rear end of the side plate; in addition, the total width of the two rudder blades is set to be greater than the spacing between the two vertical plates. In this way, when the rudder blade rotates until the blade surface of the rudder blade is perpendicular to the front and rear directions, that is, when the rudder blade is in a closed state, the sealing effect of the rudder blade on the two vertical plates can be increased to a certain extent, thereby avoiding excessive outflow of water when the rudder blade is in a closed state.

[0026] To achieve the above objectives, the special equipment in the present invention adopts the following technical solutions:

[0027] A special equipment includes a vehicle frame, a water jet propulsion device located at the rear of the vehicle body is provided on the vehicle frame, the water jet propulsion device has a water jet outlet for spraying water outward, the special equipment also includes a special equipment steering system, the special equipment steering system includes a main channel housing provided at the water jet outlet of the water jet propulsion device, at least two rudder blades arranged in the left-right direction are provided in the main channel housing, a plurality of rotating shafts corresponding to the respective rudder blades and with axes extending in the up-down direction are rotatably installed in the main channel housing, the respective rudder blades are fixed on the corresponding rotating shafts, and at least one end of each rotating shaft is an outlet end passing through the main channel housing; the special equipment steering system The system also includes a plurality of tillers corresponding to each rotating shaft, each tiller having a first end and a second end, the first end being non-rotatably connected to the outlet end of the corresponding rotating shaft, and a connecting rod being hinged between the second ends of two adjacent tillers to form a parallelogram mechanism; the special equipment steering system also includes a driving mechanism for driving each rotating shaft to rotate, the driving mechanism including a push-pull rod and a driving structure for driving the push-pull rod to move in translation, one end of the push-pull rod being hinged to one of the tillers, and the distance between the hinge axis of the push-pull rod and the tiller to the axis of the rotating shaft corresponding to the tiller is greater than or equal to 1 / 2 of the length of the tiller.

[0028] The beneficial effect of the above technical solution is that: in the special equipment of the present invention, since the driving mechanism includes a push-pull rod and a driving structure that drives the push-pull rod to move in a translational manner, and since the push-pull rod is hinged to one of the tiller handles, and the distance between the hinge axis of the push-pull rod and the tiller handle and the axis of the rotating shaft corresponding to the tiller handle is greater than or equal to 1 / 2 of the length of the tiller handle, the distance between the force application point of the push-pull rod on the tiller handle and the corresponding rotating shaft axis is greater than or equal to 1 / 2 of the length of the tiller handle, that is, when the rotating shaft is driven to rotate, the force arm between the thrust rod and the rotating shaft is greater than or equal to 1 / 2 of the length of the tiller handle. Therefore, compared with the prior art in which the driving component is directly connected to the rotating shaft transmission, the present invention increases the size of the force arm when the driving mechanism drives the rotating shaft to rotate, so that it can save more effort when driving the rotating shaft to rotate.

[0029] Furthermore, the push-pull rod is hinged to the second end of the tiller handle.

[0030] The beneficial effect of the above technical solution is that it further increases the distance between the hinge axis of the push-pull rod and the tiller and the corresponding shaft axis, that is, it further increases the force arm size when the driving shaft rotates, making the rotation of the driving shaft more labor-saving.

[0031] Furthermore, the tiller handle includes two connecting plates arranged in sequence along the up and down directions, the connecting rod is hinged to the two connecting plates and is located between the two connecting plates, and the special equipment steering system also includes an articulated shaft, which passes through the two connecting plates, the connecting rod and the push-pull rod along the up and down directions.

[0032] The beneficial effect of the above technical solution is that the tiller is set as a structure of two connecting plates, so that when the tiller, the connecting rod and the push-pull rod are hinged on the second end together, the hinge axis facilitates the hinge connection between the tiller, the connecting rod and the push-pull rod.

[0033] Furthermore, the hinge shaft is a bolt.

[0034] The beneficial effect of the above technical solution is that: the bolts can not only realize the hinge between the tiller, the connecting rod and the push-pull rod, but also the bolts can further facilitate the connection and fixation between the tiller, the connecting rod and the push-pull rod through the threaded cooperation with the nut, thereby ensuring the connection effect between the three.

[0035] Furthermore, the tiller includes two connecting plates arranged in sequence along the up-down direction, and the connecting rod is hinged to the two connecting plates and is located between the two connecting plates.

[0036] The beneficial effect of the above technical solution is that it not only avoids interference between the pull rod and other components by hingedly connecting the pull rod between the two connecting plates, but also facilitates the processing and manufacturing of the tiller handle to a certain extent while ensuring that the tiller handle has high strength by setting the tiller handle into a structure of two connecting plates.

[0037] Furthermore, the driving mechanism is a horizontally arranged hydraulic cylinder, the hydraulic cylinder includes a cylinder body and a piston rod slidably assembled in the cylinder body, and the push-pull rod is composed of the piston rod.

[0038] The beneficial effect of the above technical solution is that the driving mechanism is set as a hydraulic cylinder, which not only can form a push-pull rod through the piston rod, but also simplifies the structure of the driving mechanism. In addition, the horizontally arranged hydraulic cylinder can also reduce the space occupied by the driving mechanism in the vertical direction, facilitating the arrangement of the driving mechanism.

[0039] Furthermore, the end of the cylinder body is connected to a mounting seat, and the mounting seat is fixed on the frame longitudinal beam of the special equipment.

[0040] The beneficial effects of the above technical solution are: the fixed installation of the cylinder body is facilitated by the mounting seat, and the installation and fixation of the cylinder body on the vehicle body is facilitated by fixing the mounting seat on the frame longitudinal beam, while also ensuring the installation and fixation strength of the cylinder body to a certain extent.

[0041] Furthermore, the push-pull rod is hingedly connected to the tiller farthest from the cylinder body.

[0042] The beneficial effect of the above technical solution is that it does not limit the selection of cylinder size to a certain extent. At the same time, when a large cylinder is selected, it can also have greater force to drive the shaft to rotate, making it easier to drive the shaft to rotate.

[0043] Furthermore, the main channel shell includes two side plates arranged on the left and right and a bottom plate and a top plate arranged in parallel up and down, each side plate includes a vertical plate and an inclined plate arranged in sequence from front to back, the vertical plates of the two side plates are parallel and arranged vertically, and the inclined plates of the two side plates are inclined outward from front to back; each of the rudder blades is located in the space surrounded by the top plate, the bottom plate and the two inclined plates, the axis of each rotating shaft is coplanar with the transition line of the vertical plate and the inclined plate in each side plate, and the total width of each rudder blade is greater than the spacing between the two vertical plates.

[0044] The beneficial effect of the above technical solution is that the inclined plate is tilted outward from front to back, and since each rudder blade is located in the space surrounded by the top plate, the bottom plate and the two inclined plates, the axis of each rotating shaft is coplanar with the transition line between the vertical plate and the inclined plate in the same side plate. In this way, when the rudder blade rotates to a certain angle, compared with the structure in which the side plates are all vertical plates, the cooperation between the rudder blade and the inclined plate can increase the angle between the rear end of the side plate and the rudder blade, and then when the water flows out from between the rudder blade and the side plate, the pressure of the water flow between the rear end of the side plate and the rudder blade can be reduced, that is, it is convenient for the water to flow out from between the rudder blade and the rear end of the side plate; in addition, the total width of the two rudder blades is set to be greater than the spacing between the two vertical plates. In this way, when the rudder blade rotates until the blade surface of the rudder blade is perpendicular to the front and rear directions, that is, when the rudder blade is in a closed state, the sealing effect of the rudder blade on the two vertical plates can be increased to a certain extent, thereby avoiding excessive outflow of water when the rudder blade is in a closed state. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a three-dimensional diagram of the steering system of special equipment in the present invention;

[0046] Figure 2 This is a front view of the special equipment steering system of the present invention;

[0047] Figure 3 It is a top view of the special equipment steering system in the present invention.

[0048] In the figure: 10, water jet propulsion; 20, frame longitudinal beam; 30, main channel housing; 31, top plate; 32, bottom plate; 33, vertical plate; 34, inclined plate; 35, main water outlet; 40, rudder blade; 50, rotating shaft; 60, tiller; 61, connecting plate; 70, connecting rod; 80, articulated shaft; 90, hydraulic cylinder; 91, cylinder body; 92, piston rod; 93, mounting seat; 100, left channel housing; 120, right channel housing; 121, right water outlet; 130, vehicle body. DETAILED DESCRIPTION

[0049] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein may be arranged and designed in various different configurations.

[0050] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely intended to represent selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0051] It should be noted that, in the specific embodiments of the present invention, terms such as "first" and "second" and other relational terms that may appear are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, terms such as "include", "comprise" or any other variants thereof that may appear are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the phrase "including a ..." or other defined elements that may appear does not exclude the presence of other identical elements in the process, method, article or device that includes the elements.

[0052] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0053] In the description of the present invention, unless otherwise expressly specified or limited, the terms "provided with" and "provided with" should be understood broadly. For example, the object "provided with" may be a part of the main body, or may be arranged separately from the main body and connected to the main body. The connection may be detachable or non-detachable. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0054] The present invention is described in further detail below with reference to the examples.

[0055] Example 1 of special equipment in the present invention:

[0056] In this embodiment, an amphibious vehicle among special equipment is used as an example for explanation. Figure 1 、 Figure 2 and Figure 3 As shown, the amphibious vehicle includes a frame, on which a water jet propulsion device 10 is mounted at the rear of the vehicle body 130. The water jet propulsion device 10 has a water spray port arranged rearward. When traveling on water, the water jet propulsion device 10 sprays water outward through the water spray port to propel the vehicle forward.

[0057] like Figure 1 、 Figure 2 and Figure 3 As shown, the amphibious vehicle also includes a special equipment steering system. The special equipment operating system includes a main channel housing 30 fixed to the vehicle frame and located behind the water jet 10. The inner cavity of the main channel housing 30 constitutes the main channel, and the main channel is connected to the water jet 10. The main channel housing 30 includes two side panels arranged on the left and right, and a bottom plate 32 and a top plate 31 arranged in parallel above and below. Each side plate includes a vertical plate 33 and an inclined plate 34 arranged sequentially from front to back. The vertical plates 33 of the two side plates are parallel and arranged vertically. The inclined plates 34 of the two side plates are arranged from front to back and tilted outward. The top plate 31, the bottom plate 32, and the two inclined plates 34 surround the main channel's rearward-facing main water outlet 35 in a trumpet shape.

[0058] like Figure 1 、 Figure 2 and Figure 3As shown, two rotating shafts 50 with axes extending in the up-down direction are rotatably installed in the main channel housing 30. Specifically, the lower end of each rotating shaft 50 is rotatably installed on the base plate 32 through a bearing, and the upper end of each rotating shaft 50 has an outlet end that passes through the top plate 31 upward, and the upper part of each rotating shaft 50 is rotatably engaged with the top plate 31 through a bearing. The axis of each rotating shaft 50 is coplanar with the transition line of the vertical plate 33 and the inclined plate 34 in each side plate. Two rudder blades 40 arranged in sequence along the left and right directions are installed in the trumpet-shaped space surrounded by the top plate 31, the bottom plate 32 and the two inclined plates 34. Each rudder blade 40 has a hollow structure with a diamond-shaped cross-section, and the two rudder blades 40 are respectively fixed to the corresponding rotating shaft 50 by bolts. Specifically, the rotating shaft 50 passes through the rudder blade 40 in the up and down directions, and the rotating shaft 50 is located at the center line of the rudder blade 40. A plurality of bolt through-holes arranged in the up and down directions are provided on the rotating shaft 50 and at the center line position of the rudder blade 40, and each bolt through-hole extends in a direction perpendicular to the plate surface of the rudder blade 40. A plurality of bolts pass through the bolt through-holes on the rotating shaft 50 and the rudder blade 40 and are threadedly connected with nuts to realize a fixed connection between the rotating shaft 50 and the rudder blade 40. In addition, the inclined plates 34 are tilted outward from front to back, and since each rudder blade 40 is located in the space surrounded by the top plate 31, the bottom plate 32 and the two inclined plates 34, the axis of each rotating shaft 50 is coplanar with the transition line between the vertical plate 33 and the inclined plate 34 in each side plate. In this way, when the rudder blade 40 rotates to a certain angle, compared with the structure in which the side plates are all vertical plates, the cooperation between the rudder blade 40 and the inclined plate 34 can increase the angle between the rear end of the side plate and the rudder blade 40, and then when water flows out from between the rudder blade 40 and the side plate, the pressure of the water between the rear end of the side plate and the rudder blade 40 can be reduced, which facilitates the water to flow out from between the rudder blade 40 and the rear end of the side plate.

[0059] The two rudder blades 40 have the same size and structure. The distance between the center lines of the two rudder blades 40 is equal to the width of a single rudder blade 40. The total width of the two rudder blades 40 is slightly larger than the spacing between the two vertical plates 33. There is a certain spacing between the left side portion of the rudder blade 40 on the left and the inner wall of the left inclined plate 34. In this embodiment, the spacing is 1 mm. There is also a certain spacing between the right side portion of the rudder blade 40 on the right and the inner wall of the right inclined plate 34. In this embodiment, the spacing is also 1 mm. In this way, when the rudder blade 40 rotates, the above-mentioned spacing can ensure that there is no interference between the rudder blade 40 and the side plate.

[0060] The special equipment steering system also includes two tillers 60, each of which has a first end and a second end and includes two connecting plates 61 arranged vertically. The first end of the tiller 60 is connected to the outlet end of the corresponding rotating shaft 50 via a splined anti-rotation connection, and the connection between the tiller 60 and the rotating shaft 50 is fixed and positioned by a nut threadedly assembled on the outlet end of the rotating shaft 50 and located above the first end. A connecting rod 70 is hinged between the second ends of the two tillers 60 to form a parallelogram mechanism. Specifically, the special equipment steering system includes an articulation shaft 80. In this embodiment, the articulation shaft 80 passes through the two connecting plates 61 and the connecting rod 70 in the vertical direction, that is, the connecting rod 70 is hinged to the two connecting plates 61 via the articulation shaft 80, and the articulation end of the connecting rod 70 for articulation with the tiller 60 is located between the two connecting plates 61.

[0061] like Figure 1 、 Figure 2 and Figure 3 As shown, the special equipment steering system also includes a drive mechanism. In this embodiment, the drive mechanism is a horizontally arranged hydraulic cylinder 90, which includes a cylinder body 91 and a piston rod 92 that is slidably and telescopically assembled within the cylinder body 91. The cylinder body 91 and other components of the hydraulic cylinder 90 constitute a drive structure for driving the piston rod 92 to extend and retract. One end of the cylinder body 91 is hingedly connected to a mounting seat 93 via a ball joint. The vehicle frame includes two frame longitudinal beams 20, respectively arranged on the left and right sides of the water jet propulsion unit 10 and extending in the fore-and-aft direction. The mounting seat 93 is fixed to the right frame longitudinal beam 20.

[0062] The piston rod 92 has an extended end extending beyond the cylinder body 91. This extended end of the piston rod 92 is hingedly connected to the second end of the left tiller 60. Specifically, the piston rod 92 and the tiller 60 are hingedly connected via a hinge axis 80. The hinged end of the piston rod 92 and the tiller 60 is located on the upper and outer sides of the two connecting plates 61 in the vertical direction. The distance between the hinge axis of the piston rod 92 and the tiller 60 and the axis of the rotating shaft 50 corresponding to the tiller 60 is greater than 1 / 2 the length of the tiller 60. Furthermore, in this embodiment, the hinge axis 80 is a bolt. Thus, after passing through the two connecting plates 61, the connecting rod 70, and the piston rod 92, the hinge axis 80 can be threadedly connected to a nut to ensure the strength of the connection between the four.

[0063] When the hydraulic cylinder 90 drives the piston rod 92 to extend or retract, the piston rod 92 pushes and pulls the tiller 60 and drives the tiller 60 to rotate, thereby driving the entire parallelogram mechanism to operate. The operation of the parallelogram mechanism drives each rotating shaft 50 to rotate, and thus drives each rudder blade 40 to rotate. In this way, the rotation angle of the rudder blade 40 can be adjusted by the hydraulic cylinder 90 driving the piston rod 92 to extend or retract. The piston rod 92 constitutes a push-pull rod that pushes and pulls the rudder blade 40. When the vehicle is traveling on water and needs to turn, the rotation angle of the rudder blade 40 is adjusted by rotating the driving shaft 50. The rudder blade 40, which is rotated at a certain angle, can change the direction of the water flow ejected from the water jet 10, so that the ejected water flow has a certain angle with the front-rear direction. In this way, the rudder force generated by the water flow with changed direction can realize the steering function of the vehicle.

[0064] like Figure 1 、 Figure 2 and Figure 3 As shown, a left flow channel housing 100 is provided on the outer wall of the left vertical plate 33. The left flow channel housing 100 is arranged to be gradually tilted to the left from the back to the front and is connected to the left side of the vehicle body 130. A right flow channel housing 120 is provided on the outer wall of the right vertical plate 33. The right flow channel housing 120 is arranged to be gradually tilted to the right from the back to the front and is connected to the right side of the vehicle body 130. The inner cavity of the left flow channel housing 100 constitutes the left flow channel, and the left flow channel is connected to the main flow channel. The left flow channel has a left water inlet located on the left vertical plate 33 and a left water outlet located on the left side of the vehicle body 130. The right flow channel has a right water inlet located on the right vertical plate 33 and a right water outlet 121 located on the right side of the vehicle body 130. The lower ends of the left and right water outlets 121 are both located near the waterline L ( Figure 2 In addition, as Figure 3 As shown, the angle between the rear side of the left flow channel housing 100 and the left side of the vehicle body 130 is an acute angle α, and the angle between the rear side of the right flow channel housing 120 and the right side of the vehicle body 130 is also an acute angle α. In this way, when the two rudder blades 40 rotate to a state perpendicular to the front-rear direction ( Figure 1 and Figure 2 As shown in the figure, the two rudder blades 40 block the main water outlet 35, and the water flow ejected from the water outlet of the water jet propulsion device 10 hits the rudder blade 40, and after being guided by the left and right flow channels, it is ejected sideways and forward from the left and right water outlets 121 on the left and right sides of the vehicle body 130, realizing the reversing function.

[0065] In the special equipment of the present invention, since the driving mechanism includes a push-pull rod and a driving structure for driving the push-pull rod to move in translation, and since the push-pull rod is hinged to the tiller handle at the left end, and the distance between the hinge axis of the push-pull rod and the tiller handle and the axis of the rotating shaft corresponding to the tiller handle is greater than 1 / 2 of the length of the tiller handle, the distance between the force application point of the push-pull rod on the tiller handle and the corresponding rotating shaft axis is greater than 1 / 2 of the length of the tiller handle, that is, when the rotating shaft is driven to rotate, the force arm between the thrust rod and the rotating shaft is greater than 1 / 2 of the length of the tiller handle. Therefore, compared with the prior art in which the driving component is directly connected to the rotating shaft transmission, the present invention increases the size of the force arm when the driving mechanism drives the rotating shaft to rotate, so that it can save more effort when driving the rotating shaft to rotate.

[0066] Example 2 of special equipment in the present invention:

[0067] The difference between this embodiment and embodiment 1 is that, whereas in embodiment 1, each side plate comprises a vertical plate and an inclined plate arranged sequentially from front to back, in this embodiment, each side plate comprises only a vertical plate. In this case, the total width of each rudder blade is slightly smaller than the distance between the two vertical plates.

[0068] Example 3 of special equipment in the present invention:

[0069] This embodiment differs from Example 1 in that, in Example 1, the push-pull rod is hingedly connected to the tiller farthest from the cylinder body. In this embodiment, the push-pull rod is hingedly connected to the tiller closest to the cylinder body. In other embodiments, when there are three or more tillers, the push-pull rod can be hingedly connected to any one of the two tillers at the left and right ends.

[0070] Example 4 of special equipment in the present invention:

[0071] This embodiment differs from Embodiment 1 in that, whereas in Embodiment 1, the cylinder body is connected to the frame rail via a mounting bracket, this embodiment provides a bracket independent of the frame rail, and the mounting bracket is fixed to the bracket. Specifically, the cylinder body is connected to the bracket independent of the frame rail via the mounting bracket.

[0072] Example 5 of special equipment in the present invention:

[0073] This embodiment differs from Example 1 in that, in Example 1, the drive mechanism is a horizontally arranged hydraulic cylinder comprising a cylinder body and a piston rod slidably and telescopically assembled within the cylinder body, with the push-pull rod consisting of the piston rod. In contrast, in this embodiment, the drive mechanism is a horizontally arranged electric push rod, wherein the telescopic push rod within the electric push rod constitutes the push-pull rod. In other embodiments, the drive mechanism may also be a pneumatic push rod.

[0074] Example 6 of special equipment in the present invention:

[0075] This embodiment differs from Example 1 in that, whereas in Example 1, the drive mechanism is a horizontally arranged hydraulic cylinder comprising a cylinder body and a piston rod slidably and telescopically assembled within the cylinder body, with the push-pull rod formed by the piston rod, this embodiment, in contrast, comprises a turntable, a push rod, and a drive motor. One end of the push rod is hinged to the eccentric point of the turntable, and the other end is hinged to one of the tillers. The drive motor is in transmission connection with the turntable for driving its rotation.

[0076] Example 7 of special equipment in the present invention:

[0077] The difference between this embodiment and embodiment 1 is that in embodiment 1, the hinge shaft is a bolt, while in this embodiment, the hinge shaft is a pin.

[0078] Example 8 of special equipment in the present invention:

[0079] This embodiment differs from Example 1 in that, whereas in Example 1, the tiller includes two connecting plates arranged in sequence along the vertical direction, and the push-pull rod is hingedly connected to the two connecting plates at the second end of the tiller, this embodiment, on the other hand, includes two connecting plates arranged in sequence along the vertical direction, and the push-pull rod is hingedly connected to the two connecting plates at the middle portion of the tiller.

[0080] Example 9 of special equipment in the present invention:

[0081] This embodiment differs from Example 1 in that, whereas in Example 1, the tiller includes two connecting plates arranged in sequence along the vertical direction, and the push-pull rod and the two connecting plates are hingedly connected to the second end of the tiller, this embodiment, on the other hand, includes two connecting plates arranged in sequence along the vertical direction, and the push-pull rod and the two connecting plates are hingedly connected between the middle portion and the second end of the tiller.

[0082] Example 10 of special equipment in the present invention:

[0083] This embodiment differs from Example 1 in that, in Example 1, the tiller includes two connecting plates arranged in a vertical direction. In this embodiment, the tiller includes only one connecting plate. In other embodiments, the tiller may also include only one connecting rod. It should be noted that when the tiller includes only one connecting plate or one connecting rod, the push-pull rod and the tiller may be hinged at the middle of the tiller or at the second end of the tiller.

[0084] Example 11 of the special equipment of the present invention:

[0085] This embodiment differs from Example 1 in that, whereas in Example 1, two rudder blades were arranged in a left-right direction within the main channel housing, this embodiment has three rudder blades arranged in a left-right direction within the main channel housing. In this case, there are also three rotating shafts and three tiller handles. In other embodiments, the main channel housing may have four, five, or more rudder blades arranged in a left-right direction. The specific number of rudder blades depends on the specific dimensions of the main channel housing's inner cavity.

[0086] Example 12 of special equipment in the present invention:

[0087] The difference between this embodiment and embodiment 1 is that, in embodiment 1, the upper end of the rotating shaft passes through the top plate to form the exit end, while in this embodiment, the lower end of the rotating shaft passes through the bottom plate to form the exit end.

[0088] Example 13 of the special equipment of the present invention:

[0089] The difference between this embodiment and embodiment 1 is that, in embodiment 1, the upper end of the rotating shaft passes through the top plate, forming the exit end. In this embodiment, the upper end of the rotating shaft passes through the top plate, and the lower end of the rotating shaft passes through the bottom plate, and both the upper end and the lower end of the rotating shaft form the exit ends.

[0090] An embodiment of the special equipment steering system in the present invention: The specific structure of the special equipment steering system is the same as the special equipment steering system in the above-mentioned special equipment embodiment, and will not be repeated here.

[0091] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A special equipment steering system, comprising a main channel housing for being arranged at a water jet outlet of a special equipment water jet propulsion device, wherein at least two rudder blades arranged in a left-right direction are provided in the main channel housing, and a plurality of rotating shafts corresponding to the rudder blades and with axes extending in an up-down direction are rotatably installed in the main channel housing, wherein the rudder blades are respectively fixed on the corresponding rotating shafts, and at least one end of each rotating shaft is an exit end passing through the main channel housing; the special equipment steering system also comprises a plurality of tillers corresponding to the rotating shafts, each tiller having a first end and a second end, the first end being connected to the exit end of the corresponding rotating shaft in a non-rotatable manner, and a connecting rod being hinged between the second ends of two adjacent tillers to form a parallelogram mechanism; the special equipment steering system also comprises a driving mechanism for driving the rotating shafts to rotate, characterized in that The driving mechanism includes a push-pull rod and a driving structure for driving the push-pull rod to move horizontally, one end of the push-pull rod is hinged to one of the tiller handles, and the distance between the hinge axis of the push-pull rod and the tiller handle and the axis of the rotating shaft corresponding to the tiller handle is greater than or equal to 1 / 2 of the length of the tiller handle; the main channel shell includes two side panels arranged on the left and right and a bottom plate and a top plate arranged in parallel up and down, each side panel includes a vertical plate and an inclined plate arranged in sequence from front to back, the vertical plates of the two side panels are parallel and arranged vertically, the inclined plates of the two side panels are arranged from front to back and inclined outward, the top plate, the bottom plate and the two inclined plates form a main water outlet facing rear and in a trumpet shape, each rudder blade is located in the space surrounded by the top plate, the bottom plate and the two side panels, the rotating shaft passes through the rudder blade in the up and down direction, the rotating shaft is located at the center line of the rudder blade, the axis of each rotating shaft is coplanar with the transition line between the vertical plate and the inclined plate in each side panel, and the total width of each rudder blade is greater than the spacing between the two vertical plates.

2. The special equipment steering system according to claim 1, characterized in that: The push-pull rod is hinged to the second end of the tiller handle.

3. The special equipment steering system according to claim 2, characterized in that: The tiller handle includes two connecting plates arranged in sequence along the up and down directions, the connecting rod is hinged to the two connecting plates and is located between the two connecting plates, and the special equipment steering system also includes an articulated shaft, which passes through the two connecting plates, the connecting rod and the push-pull rod along the up and down directions.

4. The special equipment steering system according to claim 3, characterized in that: The hinge shaft is a bolt.

5. The special equipment steering system according to claim 1, characterized in that: The tiller comprises two connecting plates arranged in sequence along the up-down direction, and the connecting rod is hinged to the two connecting plates and is located between the two connecting plates.

6. The special equipment steering system according to any one of claims 1 to 5, characterized in that: The driving mechanism is a horizontally arranged hydraulic cylinder, which includes a cylinder body and a piston rod slidably and telescopically assembled in the cylinder body, and the push-pull rod is composed of the piston rod.

7. The special equipment steering system according to claim 6, characterized in that: The end of the cylinder body is connected with a mounting seat, and the mounting seat is used to be fixed on the frame longitudinal beam of the special equipment.

8. The special equipment steering system according to claim 6, characterized in that: The push-pull rod is hingedly connected to the tiller farthest from the cylinder body.

9. A special equipment, comprising a vehicle frame, a water jet propulsion device located at the rear of the vehicle body, the water jet propulsion device having a water spray port for spraying water outward, and a special equipment steering system, characterized in that: The special equipment steering system is the same as the special equipment steering system described in any one of claims 1 to 8.

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