Special linear push rod with start-stop clutch function for fire water monitor

Abstract

The invention provides a special linear push rod with a start-stop clutch function for a fire water monitor, and relates to the technical field of fire fighting equipment, the linear push rod comprises a water inlet pipeline, a water spray pipe, a linear push rod structure and a hydraulic control device, and the linear push rod comprises a clutch master cylinder, a first clutch slave cylinder, a second clutch slave cylinder, a first friction lining, a sliding sleeve and a connecting plate; a servo motor in an adopted linear push rod structure is connected with a gear set through a clutch, power is transmitted to a lead screw through the gear set, the lead screw is driven to rotate, it is avoided that the motor directly drives the lead screw, slow connection is conducted after the clutch is separated, driving impact force is relieved, stability is improved, mechanical abrasion to gears is reduced, and the service life of equipment is prolonged; meanwhile, the clutch master cylinder is controlled to drive the first clutch slave cylinder to drive the first friction lining to abut against the outer wall of the input end of the gear set when the clutch is separated, rotation of the gear set is directly braked, inertia at the gear set after the clutch is separated is removed, and automation and no delay are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting equipment, and in particular to a linear push rod with a start-stop and clutch function dedicated to a fire-fighting water cannon. Background Art

[0002] The descriptions in this section only provide background information related to the present disclosure and do not constitute prior art.

[0003] During fire extinguishing, the gun head of the fire-fighting water cannon needs to adjust the pitching angle. At this time, a linear push rod is usually used to drive the pitching angle of the gun head.

[0004] The linear push rods of traditional fire-fighting water cannons mostly adopt a structure of directly driving a lead screw by a motor. When starting, there is a large impact force due to the rigid contact between the motor and the lead screw, resulting in poor stability and easy mechanical wear of the transmission gears, which affects the service life of the equipment; when braking, it relies on the motor power-off control, and there is a large inertia after power-off, resulting in a braking delay problem, which affects the accuracy of the gun head angle adjustment. Summary of the Invention

[0005] The purpose of the present invention is to provide a linear push rod with a start-stop and clutch function dedicated to a fire-fighting water cannon, which has the advantages of slowly engaging after the clutch is separated to reduce the driving impact force, improving stability, and reducing mechanical wear on the gears; directly braking the rotation of the gear set while the clutch is separated to remove the inertia at the gear set after the clutch is separated, and solves the technical problems that the linear push rods of traditional fire-fighting water cannons mostly adopt a structure of directly driving a lead screw by a motor, resulting in a large impact force due to the rigid contact between the motor and the lead screw when starting, poor stability, easy mechanical wear of the transmission gears, and a large inertia after power-off.

[0006] The present invention provides a linear push rod with a start-stop and clutch function dedicated to a fire-fighting water cannon, including: An inlet water pipe, the upper end of which is rotatably communicated with a water spray pipe; One end of a linear push rod structure is rotatably sleeved in the middle of the inlet water pipe, and the other end is hinged to the bottom surface of the water spray pipe; The driving component of the linear push rod structure includes a servo motor, a clutch and a gear set; The output end of the servo motor is fixedly connected with a clutch, and the output end of the clutch is fixedly connected with the input end of the gear set; The output end of the gear set is the lead screw of the linear push rod structure; A hydraulic control device, which includes: A clutch master cylinder, the output end of which is fixedly connected with a first clutch slave cylinder and a second clutch slave cylinder; The telescopic end of the first clutch slave cylinder is fixedly connected with a first friction lining, and when the telescopic end of the first clutch slave cylinder extends, it pushes the first friction lining to abut against the outer wall of the input end of the gear set; The clutch is provided with a sliding sleeve, and a connecting plate is fixedly sleeved on the outer wall thereof; The second clutch slave cylinder is fixedly connected to the connecting plate along the moving direction of the sliding sleeve.

[0007] As a further optimization scheme, in order to use the servo motor as the power to connect the gear set through the clutch, and use the gear set to transmit the driving force to the lead screw, avoiding the servo motor directly driving the lead screw structure, ensuring the smooth start and timely stop of the lead screw, the linear push rod structure further includes: A cylinder body, the lower end of the side wall of which is fixedly communicated with a side shell, and the lower end of the cylinder body is designed with a sealed end; The servo motor is fixedly assembled in the side shell, and the clutch is located in the side shell; The first clutch slave cylinder is fixed in the side shell, and the second clutch slave cylinder is fixed in the cylinder body; The gear set is located in the cylinder body and the side shell; A collar is fixedly assembled at the lower ends of the cylinder body and the side shell, and it is rotatably sleeved in the middle of the water inlet pipe; The lower end of the lead screw is rotatably assembled on the bottom surface of the inner cavity of the cylinder body, and the upper end of the lead screw is screwed with a cylinder column; A ring-shaped slider is fixedly assembled coaxially at the lower end of the cylinder column, and it is screwed on the outside of the lead screw; A longitudinal sliding guide structure is assembled between the ring-shaped slider and the inner wall of the cylinder body; The upper end of the cylinder column extends out of the upper end opening of the cylinder body.

[0008] As a further optimization scheme, in order to sense the magnet on the ring-shaped slider through the induction coil after the ring-shaped slider rises to the specified position, the induction coil transmits a signal to the controller, and the controller controls the servo motor to cut off the power and stop driving the rotation of the lead screw, automatically controlling the linear push rod to stop stretching when reaching the predetermined stop position, a stretching limit structure is assembled between the outer wall of the ring-shaped slider and the inner wall of the cylinder body, and it includes: A magnet, which is embedded and assembled on the outer wall of the ring-shaped slider; An induction coil is fixedly assembled at the upper end of the inner wall of the cylinder body corresponding to the direction where the magnet is located; The induction coil is electrically connected to a controller; Electromagnets are fixedly assembled on both the left and right sides of the upper surface of the clutch, and the electromagnets are electrically connected to the controller.

[0009] As a further optimization scheme, in order to play a longitudinal guiding role when the lead screw drives the ring-shaped slider, ensuring that the ring-shaped slider slides up and down along the strip-shaped slide rail, and driving the cylinder column to rise and fall through the ring-shaped slider, the longitudinal sliding guide structure includes: A strip-shaped slide rail, which is integrally formed on the inner wall of the cylinder body along the length direction; A strip-shaped chute is longitudinally opened on the outer wall of the ring-shaped slider corresponding to the strip-shaped slide rail; The bar-shaped slide rail is slidably assembled in the bar-shaped chute.

[0010] As a further optimization scheme, in order to transmit the driving force of the servo motor to the lead screw and drive the lead screw to rotate, the gear set includes: A first shaft rod and a second shaft rod, which are respectively rotatably assembled on the left and right sides of the bottom surface of the inner cavity of the side housing; The clutch is provided with a flywheel; The upper end of the first shaft rod is fixedly connected coaxially with the flywheel; A first gear is fixedly sleeved on the outer wall of the first shaft rod; A double gear is fixedly sleeved on the outer wall of the second shaft rod; A second gear is fixedly sleeved on the lower end of the outer wall of the lead screw; The outer wall of the first gear meshes with the upper end of the double gear, and the outer wall of the second gear meshes with the lower end of the double gear.

[0011] As a further optimization scheme, in order to drive the hydraulic oil in the clutch master cylinder into the first clutch slave cylinder and the second clutch slave cylinder by stepping on the movable part of the foot-operated reset structure, and drive the telescopic ends of the first clutch slave cylinder and the second clutch slave cylinder to extend, the hydraulic control device further includes: A housing, the front wall of which is longitudinally provided with a bar-shaped window; The front end of the inner cavity of the housing is assembled with a foot-operated reset structure, and the front end of its movable part extends to the outside through the bar-shaped window; After the movable part of the foot-operated reset structure is stepped on and moved backward, it squeezes the telescopic end of the clutch master cylinder.

[0012] As a further optimization scheme, in order to squeeze the telescopic end of the clutch master cylinder by stepping on the foot, and when the foot is lifted to remove the external force, the torsion spring drives the round rod to rotate and reset, and the round rod drives the pedal connecting rod and the pedal to flip and reset, the foot-operated reset structure includes: A round rod, which is rotatably assembled above the front end of the inner cavity of the housing; Torsion springs are sleeved on both the left and right sides of the outer wall of the round rod; One end of the torsion spring is fixedly connected to the same side of the inner cavity of the housing, and the other end of the torsion spring is fixedly connected to the outer wall of the round rod; One end of a pedal connecting rod is fixedly sleeved on the outer wall of the round rod corresponding to the bar-shaped window, and the other end of the pedal connecting rod passes through the bar-shaped window and is fixedly assembled with a pedal.

[0013] As a further optimization solution, in order to lift and lower the sliding sleeve through hydraulic drive, when the sliding sleeve descends, it squeezes one end of the arc-shaped elastic steel sheet. Under the limit and block of the limit frame, the other end of the arc-shaped elastic steel sheet deforms upward, driving the pressure plate to rise. Conversely, when the sliding sleeve descends and resets, the arc-shaped elastic steel sheet resets to support the pressure plate against the second friction lining, making the second friction lining closely fit with the flywheel, and the flywheel can be driven to rotate. The clutch includes: A clutch cover, with one end of a spring fixedly connected to the bottom surface of its inner cavity, and the other end of the spring fixedly connected to a pressure plate; The springs are symmetrically arranged on the left and right sides between the clutch cover and the pressure plate; The sliding sleeve is slidably assembled in the middle of the top surface of the clutch cover; A connecting rod is rotatably inserted into the sliding sleeve; The upper end of the connecting rod is fixedly connected to the output end of the servo motor, and the lower end of the connecting rod is fixedly equipped with a second friction lining; A flywheel, which is rotatably assembled at the lower end of the clutch cover; The second friction lining abuts against the upper surface of the flywheel, and the pressure plate abuts against the upper surface of the second friction lining; Arc-shaped elastic steel sheets are symmetrically and fixedly assembled on the left and right sides between the lower end of the sliding sleeve and the pressure plate; A limit frame is fixedly provided on the bottom surface of the inner cavity of the clutch cover corresponding to the same-side arc-shaped elastic steel sheet, and the arc-shaped elastic steel sheet passes through and abuts against the lower end of the inner wall of the same-side limit frame.

[0014] As a further optimization solution, in order to facilitate the movement of the device, a moving base is fixedly assembled at the lower end of the water inlet pipe and the lower end of the hydraulic control device.

[0015] As a further optimization solution, in order to integrally fix the device and facilitate the overall movement of the device, the moving base includes: A bottom plate, and the lower ends of the water inlet pipe and the hydraulic control device are fixedly assembled on the bottom plate; Universal wheels with brakes are fixedly assembled at the four corners of the bottom surface of the bottom plate.

[0016] The present invention provides a linear push rod with a start-stop and clutch function specifically for a fire water monitor through improvement. Compared with the prior art, it has the following improvements and advantages: First, a linear push rod structure is adopted to drive the water spray pipe rotatably connected to the upper end of the water inlet pipe to flip the pitching angle. In the adopted linear push rod structure, the servo motor is connected to the gear set through a clutch, and the power is transmitted to the lead screw through the gear set to drive the lead screw to rotate. By controlling the clutch master cylinder, the second clutch slave cylinder is driven to separate the clutch, avoiding direct drive of the lead screw by the motor. After the clutch is separated and then slowly engaged, the driving impact force is reduced, the stability is improved, the mechanical wear of the gears is reduced, and the service life of the equipment is prolonged; 2. The control of the clutch master cylinder also drives the first clutch slave cylinder to drive the first friction lining to abut against the outer wall of the input end of the gear set when the clutch is disengaged, directly braking the rotation of the gear set, removing the inertia at the gear set after the clutch is disengaged, achieving automatic and delay-free operation, and ensuring the accuracy of the boom angle adjustment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic structural diagram of the present invention; Figure 2 It is a schematic cross-sectional view of the structure of the clutch in the engaged state of the linear push rod structure of the present invention; Figure 3 It is a schematic cross-sectional view of the structure of the clutch in the disengaged state of the linear push rod structure of the present invention; Figure 4 It is a schematic cross-sectional view of the structure of the extension limit structure when the lead screw of the present invention extends; Figure 5 It is a schematic cross-sectional view of the structure of the extension limit structure when the lead screw of the present invention retracts; Figure 6 It is a schematic structural diagram of the hydraulic control device of the present invention; Figure 7 It is a schematic cross-sectional view of the structure of the clutch in the engaged state of the present invention; Figure 8 It is a schematic cross-sectional view of the structure of the clutch in the disengaged state of the present invention; Figure 9 It is a schematic structural diagram of the assembly structure of the water inlet pipe and the water spray pipe of the present invention; Figure 10 It is a schematic structural diagram of the assembly structure of the water spray pipe and the linear push rod structure of the present invention; Figure 11 It is a schematic structural diagram of the mobile base of the present invention.

[0019] Description of the reference numerals: 1 - Mobile base, 11 - Bottom plate, 12 - Universal wheel with brake, 2 - Water inlet pipe, 3 - Water spray pipe, 4 - Linear push rod structure, 41 - Cylinder body, 42 - Side housing, 43 - Servo motor, 44 - Clutch, 441 - Clutch cover, 442 - Flywheel, 443 - Connecting rod, 444 - Sliding sleeve, 445 - Pressure plate, 446 - Pressure plate, 447 - Spring, 448 - Arc-shaped elastic metal sheet, 45 - Ring-shaped slider, 46 - Connecting plate, 47 - Lead screw, 48 - Gear set, 481 - First shaft rod, 482 - First gear, 483 - Second shaft rod, 484 - Double gear, 485 - Second gear, 49 - Cylindrical column, 5 - Hydraulic control device, 51 - Housing, 52 - Strip-shaped window, 53 - Foot-operated reset structure, 531 - Round rod, 532 - Pedal connecting rod, 533 - Pedal, 534 - Torsion spring, 54 - Clutch master cylinder, 55 - First clutch slave cylinder, 551 - First friction lining, 56 - Second clutch slave cylinder, 6 - Controller, 7 - Strip-shaped slide rail, 8 - Strip-shaped chute, 9 - Extension limit structure, 91 - Magnet, 92 - Induction coil, 93 - Electromagnet. Specific embodiments

[0020] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0022] In the description of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined. In addition, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Please refer to Figures 1-11 , the present invention provides a technical solution: a linear push rod with a start-stop and clutch function for a fire water monitor, comprising: An inlet pipe 2, the upper end of which is rotationally communicated with a water spray pipe 3; One end of a linear push rod structure 4 is rotationally sleeved in the middle of the inlet pipe 2, and the other end is hinged to the bottom surface of the water spray pipe 3; The driving components of the linear push rod structure 4 include a servo motor 43, a clutch 44, and a gear set 48; The output end of the servo motor 43 is fixedly connected to the clutch 44, and the output end of the clutch 44 is fixedly connected to the input end of the gear set 48; The output end of the gear set 48 is a lead screw 47 of the linear push rod structure 4; A hydraulic control device 5, which comprises: A clutch master cylinder 54, the output end of which is fixedly connected to a first clutch slave cylinder 55 and a second clutch slave cylinder 56; The telescopic end of the first clutch slave cylinder 55 is fixedly connected to a first friction lining 551, and the telescopic end of the first clutch slave cylinder 55 extends to push the first friction lining 551 against the outer wall of the input end of the gear set 48; The clutch 44 is provided with a sliding sleeve 444, and a connecting plate 46 is fixedly sleeved on the outer wall thereof; The second clutch slave cylinder 56 is fixedly connected to the connecting plate 46 along the inward movement direction of the sliding sleeve 444.

[0024] Specifically, in this embodiment, the water inlet pipe 2 is connected to an external water pipe for water inlet, and the water is ejected through the water spray pipe 3. The upper end of the water inlet pipe 2 is connected to the water spray pipe 3 through a rotary joint. The linear push rod structure 4 extends to push the water spray pipe 3 to turn upward, and the linear push rod structure 4 retracts to drive the water spray pipe 3 to turn downward to achieve angle adjustment. The clutch 44 used is a friction clutch in the prior art, which is a direct application of the prior art. The linear push rod adopted is provided with a clutch 44 driven by a second clutch slave cylinder 56 and a first friction lining 551 driven by a first clutch slave cylinder 55 on the basis of the prior art. Further, during use, by squeezing the telescopic end of the clutch master cylinder 54, hydraulic oil is supplied into the first clutch slave cylinder 55 and the second clutch slave cylinder 56. The second clutch slave cylinder 56 drives the clutch 44 to disengage, avoiding direct driving of the lead screw 47 by the motor. After the clutch 44 disengages, it is slowly engaged to reduce the driving impact force, improve stability, reduce mechanical wear on the gears, and extend the service life of the equipment. The slow engagement is achieved by slowly releasing the pressure on the telescopic end of the clutch master cylinder 54. The operation method is similar to that of an automobile clutch in the prior art, that is, first step on the clutch and then slowly lift it. When it is necessary to stop the extension of the linear push rod structure 4 midway, by squeezing the telescopic end of the clutch master cylinder 54, hydraulic oil is supplied into the second clutch slave cylinder 56. The second clutch slave cylinder 56 drives the clutch 44 to disengage, disconnecting the power transmission, and then the power supply of the servo motor 43 is disconnected to reduce the inertial transmission. More specifically, the control of the clutch master cylinder 54 also drives the first clutch slave cylinder 55 to drive the first friction lining 551 to abut against the outer wall of the input end of the gear set 48 when the clutch 44 disengages, directly braking the rotation of the gear set 48, removing the inertia at the gear set 48 after the clutch 44 disengages, achieving automatic non-delay, and ensuring the accuracy of the gun head angle adjustment. It can be understood that the designed linear push rod structure 4 in this device can also be used for angle adjustment, lifting adjustment, and position adjustment of other equipment, and clutch control is performed during the start and stop of the adjustment process to achieve a smooth start and a non-delay stop.

[0025] In some embodiments, the linear push rod structure 4 further includes: A cylinder body 41, the lower end of the side wall of which is fixedly communicated with a side shell 42, and the lower end of the cylinder body 41 is designed with a sealed end. The servo motor 43 is fixedly assembled in the side shell 42, and the clutch 44 is located in the side shell 42. The first clutch slave cylinder 55 is fixed in the side shell 42, and the second clutch slave cylinder 56 is fixed in the cylinder body 41. The gear set 48 is located in the cylinder body 41 and the side shell 42. The lower ends of the cylinder body 41 and the side shell 42 are fixedly assembled with a collar, which is rotatably sleeved on the middle part of the water inlet pipe 2. The lower end of the lead screw 47 is rotatably assembled on the bottom surface of the inner cavity of the cylinder body 41, and a cylinder column 49 is screwed to the upper end of the lead screw 47; A ring-shaped slider 45 is coaxially and fixedly assembled at the lower end of the cylinder column 49, and it is screwed outside the lead screw 47; A longitudinal sliding guiding structure is assembled between the ring-shaped slider 45 and the inner wall of the cylinder body 41; The upper end of the cylinder column 49 extends out of the upper end opening of the cylinder body 41.

[0026] Specifically in this embodiment, the sleeve rings at the lower ends of the cylinder body 41 and the side shell 42 are rotatably sleeved on the middle part of the water inlet pipe 2. In this embodiment, the middle part of the water inlet pipe 2 is horizontally arranged; Furthermore, when the servo motor 43 works, power is transmitted to the lead screw 47 through the clutch 44 and the gear set 48, driving the lead screw 47 to rotate. Under the action of the longitudinal sliding guiding structure, the rotating lead screw 47 drives the cylinder column 49 to move up and down along the length direction of the inner cavity of the cylinder body 41; It can be understood that the side shell 42 is fixed to the lower end of the side wall of the cylinder body 41 through the ear plates and bolts. By removing the bolts, the side shell 42 can be disassembled, which is convenient for the inspection and maintenance of the devices inside the cylinder body 41 and the side shell 42.

[0027] In some embodiments, a stretching limit structure 9 is assembled between the outer wall of the ring-shaped slider 45 and the inner wall of the cylinder body 41, and it includes: A magnet 91, which is embedded and assembled on the outer wall of the ring-shaped slider 45; An induction coil 92 is fixedly assembled on the upper end of the inner wall of the cylinder body 41 corresponding to the direction where the magnet 91 is located; The induction coil 92 is electrically connected to a controller 6; Electromagnets 93 are fixedly assembled on both the left and right sides of the upper surface of the clutch 44, and the electromagnets 93 are electrically connected to the controller 6.

[0028] Specifically in this embodiment, the pressure plate 446 inside the clutch 44 is made of a metal material that can be magnetically adsorbed. After the electromagnet 93 is powered on, it adsorbs the pressure plate 446; the electromagnet 93 adopts a strong magnetic model. At the same time, in order to reduce the weakening of magnetism by the outer shell of the clutch 44, the electromagnet 93 can be embedded on both the left and right sides of the upper surface of the clutch 44 to ensure that the magnetic adsorption force is greater than the elastic support force and other external forces received by the pressure plate 446, so that the pressure plate 446 moves upward to realize the separation control of the clutch 44; Furthermore, after the ring-shaped slider 45 drives the magnet 91 to move to a predetermined position, the magnet 91 corresponds to the position of the induction coil 92. The induction coil 92 senses the magnet 91, and the induction coil 92 transmits an electrical signal to the controller 6. Through the controller 6, the electromagnet 93 is controlled to be turned on and work, so as to realize the automatic stop after the linear push rod extends to a predetermined length.

[0029] In some embodiments, the longitudinal sliding guide structure includes: A strip-shaped slide rail 7 integrally formed on the inner wall of the cylinder body 41 along the length direction; A strip-shaped chute 8 is longitudinally formed on the outer wall of the annular slider 45 corresponding to the strip-shaped slide rail 7; The strip-shaped slide rail 7 is slidably assembled in the strip-shaped chute 8; the cooperation between the strip-shaped chute 8 and the strip-shaped slide rail 7 plays a longitudinal guiding role when the lead screw 47 drives the annular slider 45, ensuring that the annular slider 45 slides up and down along the strip-shaped slide rail 7, and driving the cylinder column 49 to rise and fall through the annular slider 45.

[0030] In some embodiments, the gear set 48 includes: A first shaft rod 481 and a second shaft rod 483, which are respectively rotatably assembled on the left and right sides of the bottom surface of the inner cavity of the side housing 42; The clutch 44 is provided with a flywheel 442; The upper end of the first shaft rod 481 is coaxially and fixedly connected to the flywheel 442; A first gear 482 is fixedly sleeved on the outer wall of the first shaft rod 481; A double gear 484 is fixedly sleeved on the outer wall of the second shaft rod 483; A second gear 485 is fixedly sleeved on the lower end of the outer wall of the lead screw 47; The outer wall of the first gear 482 meshes with the upper end of the double gear 484, and the outer wall of the second gear 485 meshes with the lower end of the double gear 484.

[0031] Specifically in this embodiment, the driving force is transmitted through the cooperation of multiple groups of gears, transmitting the driving force of the servo motor 43 to the lead screw 47 to drive the lead screw 47 to rotate.

[0032] In some embodiments, the hydraulic control device 5 further includes: A housing 51, with a strip-shaped window 52 longitudinally formed on its front wall; A foot-operated reset structure 53 is assembled at the front end of the inner cavity of the housing 51, and its movable part extends to the outside through the strip-shaped window 52 at the front end; The movable part of the foot-operated reset structure 53 is stepped on and moved backward to squeeze the telescopic end of the clutch master cylinder 54.

[0033] Specifically in this embodiment, by stepping on the movable part of the foot-operated reset structure 53, the hydraulic oil in the clutch master cylinder 54 is driven into the first clutch slave cylinder 55 and the second clutch slave cylinder 56, driving the telescopic ends of the first clutch slave cylinder 55 and the second clutch slave cylinder 56 to extend; Furthermore, the clutch 44 is controlled to be separated and engaged by foot, and at the same time, when the clutch 44 is separated, the shaft rod at the input end of the gear set 48 is braked, and the braking is released after engagement, which is more convenient to operate, and the operation is similar to that of an automobile clutch, reducing the learning difficulty.

[0034] In some embodiments, the pedal reset structure 53 includes: A round rod 531, which is rotatably assembled above the front end of the inner cavity of the housing 51; Torsion springs 534 are sleeved on both the left and right sides of the outer wall of the round rod 531; One end of the torsion spring 534 is fixedly connected to the same side of the inner cavity of the housing 51, and the other end of the torsion spring 534 is fixedly connected to the outer wall of the round rod 531; One end of a pedal connecting rod 532 is fixedly sleeved on the outer wall of the round rod 531 corresponding to the strip window 52, and the other end of the pedal connecting rod 532 passes through the strip window 52 and is fixedly assembled with a pedal 533.

[0035] Specifically in this embodiment, after stepping on the pedal 533, the pedal 533 flips backward, squeezing the telescopic end of the clutch master cylinder 54. Hydraulic oil is contained in the clutch master cylinder 54 and the clutch slave cylinder. The clutch master cylinder 54 and the clutch slave cylinder are connected by a pipeline. After the telescopic end of the clutch master cylinder 54 is squeezed, the hydraulic oil inside it enters the clutch slave cylinder along the pipeline, agitating the telescopic end of the clutch slave cylinder to extend; Further, when no longer stepping on it, the torsion spring 534 drives the round rod 531 to reset, and the round rod 531 drives the pedal connecting rod 532 and the pedal 533 to reset.

[0036] In some embodiments, the clutch 44 includes: A clutch cover 441, with one end of a spring 447 fixedly connected to the bottom surface of its inner cavity, and the other end of the spring 447 fixedly connected to a pressure plate 446; The springs 447 are symmetrically arranged on the left and right sides between the clutch cover 441 and the pressure plate 446; A sliding sleeve 444 is slidably assembled in the middle of the top surface of the clutch cover 441; A connecting rod 443 is rotatably inserted into the sliding sleeve 444; The upper end of the connecting rod 443 is fixedly connected to the output end of the servo motor 43, and the lower end of the connecting rod 443 is fixedly assembled with a second friction lining 445; A flywheel 442, which is rotatably assembled at the lower end of the clutch cover 441; The second friction lining 445 abuts against the upper surface of the flywheel 442, and the pressure plate 446 abuts against the upper surface of the second friction lining 445; Arc-shaped elastic steel sheets 448 are symmetrically and fixedly assembled on the left and right sides between the lower end of the sliding sleeve 444 and the pressure plate 446; A limiting frame is fixed to the bottom surface of the inner cavity of the clutch cover 441 corresponding to the same-side arc-shaped elastic steel sheet 448, and the arc-shaped elastic steel sheet 448 passes through and abuts against the lower end of the inner wall of the same-side limiting frame.

[0037] Such as Figure 8As shown, specifically in this embodiment, the limiting frame is a rectangular frame body, which is used to block and limit the arc-shaped elastic steel sheet 448 when one end of the arc-shaped elastic steel sheet 448 is pressed downward, so that the other end of the arc-shaped elastic steel sheet 448 can deform upward; Further, when the telescopic end of the clutch master cylinder 54 is squeezed, hydraulic oil is conveyed to the second clutch slave cylinder 56. The telescopic end of the second clutch slave cylinder 56 extends to push the connecting plate 46 and the sliding sleeve 444 downward. The sliding sleeve 444 descends to squeeze one end of the arc-shaped elastic steel sheet 448. Under the limiting and blocking of the limiting frame, the other end of the arc-shaped elastic steel sheet 448 deforms upward, driving the pressure plate 446 to rise. At this time, it is the separation state of the clutch 44; on the contrary, when the sliding sleeve 444 descends and resets, the arc-shaped elastic steel sheet 448 resets to support the pressure plate 446 against the second friction lining 445, so that the second friction lining 445 is closely attached to the flywheel 442, and the flywheel 442 can be driven to rotate. At this time, it is the engagement state of the clutch 44; It can be understood that the surface of the pressure plate 446 is smooth to reduce the friction with the second friction lining 445.

[0038] As a further optimization scheme, in order to facilitate the movement of the device, a moving base is fixedly assembled at the lower end of the water inlet pipe and the lower end of the hydraulic control device, which is convenient for the movement of the device.

[0039] In some embodiments, the moving base 1 includes: A bottom plate 11, and the lower ends of the water inlet pipe 2 and the hydraulic control device 5 are fixedly assembled on the bottom plate 11; Universal wheels 12 with brakes are fixedly assembled at the four corners of the bottom surface of the bottom plate 11 to integrally fix the device and facilitate the overall movement of the device.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A linear push rod with start-stop and clutch functions dedicated to a fire fighting water cannon, characterized in that, Comprising: An inlet pipe, the upper end of which is rotatably connected to a water spray pipe; The middle part of the inlet pipe is rotatably sleeved with one end of a linear push rod structure, and the other end is hinged to the bottom surface of the water spray pipe; The driving component of the linear push rod structure includes a servo motor, a clutch and a gear set; The output end of the servo motor is fixedly connected to the clutch, and the output end of the clutch is fixedly connected to the input end of the gear set; The output end of the gear set is the lead screw of the linear push rod structure; A hydraulic control device, which includes: A master clutch cylinder, the output end of which is fixedly connected to a first slave clutch cylinder and a second slave clutch cylinder; The telescopic end of the first slave clutch cylinder is fixedly connected to a first friction lining, and the telescopic end of the first slave clutch cylinder extends to push the first friction lining against the outer wall of the input end of the gear set; The clutch is provided with a sliding sleeve, and a connecting plate is fixedly sleeved on the outer wall thereof; The second slave clutch cylinder is fixedly connected to the connecting plate along the inner moving direction of the sliding sleeve.

2. The linear push rod with start-stop belt clutch function dedicated to a fire water cannon according to claim 1, wherein, The linear push rod structure further includes: A cylinder body, the lower end of the side wall of which is fixedly communicated with a side shell, and the lower end of the cylinder body is designed with a sealed end; The servo motor is fixedly assembled in the side shell, and the clutch is located in the side shell; The first slave clutch cylinder is fixed in the side shell, and the second slave clutch cylinder is fixed in the cylinder body; The gear set is located in the cylinder body and the side shell; The lower ends of the cylinder body and the side shell are fixedly assembled with a collar, which is rotatably sleeved on the middle part of the inlet pipe; The lower end of the lead screw is rotatably assembled on the bottom surface of the inner cavity of the cylinder body, and the upper end of the lead screw is screwed with a cylinder column; The lower end of the cylinder column is coaxially fixedly assembled with an annular slider, which is screwed on the outside of the lead screw; A longitudinal sliding guiding structure is assembled between the annular slider and the inner wall of the cylinder body; The upper end of the cylinder column extends out of the upper end opening of the cylinder body.

3. The linear push rod with start-stop belt clutch function special for a fire water monitor according to claim 2, characterized in that, An expansion limiting structure is assembled between the outer wall of the annular slider and the inner wall of the cylinder body, which includes: A magnet, which is embedded and assembled on the outer wall of the annular slider; An induction coil is fixedly assembled on the upper end of the inner wall of the cylinder body corresponding to the direction where the magnet is located; The induction coil is electrically connected to a controller; Electromagnets are fixedly assembled on both the left and right sides of the upper surface of the clutch, and the electromagnets are electrically connected to the controller.

4. The linear push rod with start-stop belt clutch function for a special fire water monitor according to claim 2, characterized in that, The longitudinal sliding guiding structure includes: A strip-shaped slide rail, which is integrally formed on the inner wall of the cylinder body along the length direction; A strip-shaped chute is longitudinally opened on the outer wall of the annular slider corresponding to the strip-shaped slide rail; The strip-shaped slide rail is slidably assembled in the strip-shaped chute.

5. The linear push rod with start-stop belt clutch function dedicated to a fire water monitor according to claim 2, characterized in that, The gear set includes: A first shaft rod and a second shaft rod, which are respectively rotatably assembled on the left and right sides of the bottom surface of the inner cavity of the side shell; The clutch is provided with a flywheel; The upper end of the first shaft rod is coaxially fixedly connected to the flywheel; A first gear is fixedly sleeved on the outer wall of the first shaft rod; A double gear is fixedly sleeved on the outer wall of the second shaft rod; A second gear is fixedly sleeved on the lower end of the outer wall of the lead screw; The outer wall of the first gear meshes with the upper end of the double gear, and the outer wall of the second gear meshes with the lower end of the double gear.

6. The linear push rod with start-stop belt clutch function dedicated to a fire water cannon according to claim 1, characterized in that, The hydraulic control device further includes: A housing, the front wall of which is longitudinally provided with a strip-shaped window; A foot-operated reset structure is assembled at the front end of the inner cavity of the housing, and the front end of the movable part thereof extends to the outside through the strip-shaped window; After the movable part of the foot-operated reset structure is stepped on and moves backward, it squeezes the telescopic end of the master clutch cylinder.

7. The linear push rod with start-stop belt clutch function dedicated to a fire water cannon according to claim 6, characterized in that, The foot-operated reset structure includes: A round rod is rotatably assembled above the front end of the inner cavity of the housing; Torsion springs are sleeved on both the left and right sides of the outer wall of the round rod; One end of each torsion spring is fixedly connected to the same side of the inner cavity of the housing, and the other end of the torsion spring is fixedly connected to the outer wall of the round rod; One end of a pedal connecting rod is fixedly sleeved on the outer wall of the round rod corresponding to the strip window, and the other end of the pedal connecting rod passes through the strip window and is fixedly assembled with a pedal.

8. The linear push rod with start-stop belt clutch function dedicated to a fire water cannon according to claim 1, characterized in that, The clutch includes: A clutch cover, one end of a spring is fixedly connected to the bottom surface of the inner cavity thereof, and the other end of the spring is fixedly connected to a pressure plate; The springs are symmetrically arranged on the left and right sides between the clutch cover and the pressure plate; A sliding sleeve is slidably assembled in the middle of the top surface of the clutch cover; A connecting rod is rotatably inserted into the sliding sleeve; The upper end of the connecting rod is fixedly connected to the output end of the servo motor, and the lower end of the connecting rod is fixedly assembled with a second friction lining; A flywheel is rotatably assembled below the clutch cover; The second friction lining abuts against the upper surface of the flywheel, and the pressure plate abuts against the upper surface of the second friction lining; Arc-shaped elastic steel sheets are symmetrically and fixedly assembled on the left and right sides between the lower end of the sliding sleeve and the pressure plate; A limiting frame is fixed to the bottom surface of the inner cavity of the clutch cover corresponding to the same-side arc-shaped elastic steel sheet, and the arc-shaped elastic steel sheet passes through and abuts against the lower end of the inner wall of the same-side limiting frame.

9. According to the linear push rod with start-stop belt clutch function for a special fire water monitor as claimed in claim 1, a moving base is fixedly assembled at the lower ends of the water inlet pipe and the hydraulic control device.

10. A linear push rod with a start-stop belt clutch function dedicated to a fire water cannon according to claim 9, characterized in that, The moving base includes: A bottom plate, the lower ends of the water inlet pipe and the hydraulic control device are fixedly assembled on the bottom plate; Universal wheels with brakes are fixedly assembled at the four corners of the bottom surface of the bottom plate.

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