Double-linkage leveling device and fire fighting truck
By adopting a dual-linked leveling device in the fire truck of the climbing platform, the linkage structure of the fixed arm, connecting arm, curved arm and power unit is simplified, and the leveling operation of the working platform is solved, and the complex operation and high cost in the existing technology are solved. The problem of this achieves a more efficient leveling effect.
Patent Information
- Application Number
- CN202420265211.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-02-02
AI Technical Summary
In the existing fire trucks on the climbing platform, the leveling method of double oil cylinder + connecting rod leads to complex operation, increasing the burden on the operator and the possibility of program errors, and is also at a high cost.
A dual-linked leveling device is adopted, including a fixed arm, a connecting arm, a curved arm, a power unit and a connecting rod assembly. The horizontal leveling of the working platform is achieved through a power unit and a linkage structure, simplifying the leveling logic and procedures.
It reduces the probability of problems in leveling procedures, shortens debugging time, saves power costs, and improves the stability of the working platform.
Smart Images
Figure CN222249964U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engineering machinery, in particular to a double-linkage leveling device and a fire truck. Background Art
[0002] Aerial platform fire truck is a special equipment that can lift the staff and related rescue equipment to the designated position through the working platform and the action of the boom. It is mainly used for fire fighting, rescue, installation and maintenance. The working platform is installed at the top of the boom. During the boom amplitude movement, the working platform must be kept in a horizontal state at all times. At present, in order to increase the rescue height, almost all aerial platform fire trucks adopt a straight arm + curved arm structure. In this way, under the condition of a certain vehicle size, in order to achieve a larger rescue height, the working platform adopts a leveling method of two cylinders + connecting rods, which can achieve a larger working height and a larger working range.
[0003] However, this dual-cylinder + connecting rod leveling method has to control the action logic of the two leveling cylinders to participate in the leveling cylinders within different angle ranges, that is, within a certain angle range, one cylinder participates in the leveling and the other cylinder does not participate in the leveling, and within a certain angle range, both cylinders are required to participate in the leveling at the same time. The leveling action logic and leveling procedure of the working platform are complicated, especially in the manual operation state. The operator must be clear about the action sequence and action logic to complete the corresponding operation. The requirements for the operator are also high, otherwise it is easy to be dangerous. In addition, the leveling procedure is complicated and the possibility of program bugs increases, which leads to longer debugging time. Finally, due to the use of two cylinders, two proportional control systems must be added, so the cost of using this leveling method for the working platform is relatively high. Utility Model Content
[0004] The purpose of the utility model is to provide a double-linkage leveling device and a fire truck, which can simplify the leveling logic actions and procedures, reduce the probability of program problems, shorten the debugging time, and reduce the time cost.
[0005] The embodiment of the utility model is achieved as follows:
[0006] In the first aspect, the utility model provides a double-linkage leveling device, including a fixed arm, a connecting arm, a curved arm, a power unit and a connecting rod assembly, the fixed arm is used to connect to the working platform, one end of the connecting arm is rotatably connected to the fixed arm at a first connection point, and the other end is rotatably connected to the curved arm at a second connection point, and the first connection point is at the same height as the bottom wall of the working platform in a horizontal position, the connecting rod assembly is connected to the fixed arm, the connecting arm and the curved arm to form a linkage structure, one end of the power unit is rotatably connected to the curved arm, and the other end is rotatably connected to the connecting arm.
[0007] In an optional embodiment, the fixed arm includes a fixed portion and an inclined portion, one side of the fixed portion is used to connect to the side wall of the working platform, and the other side is connected to the inclined portion, the inclined portion is inclined toward the bottom wall of the working platform, and the inclined portion is rotatably connected to the connecting arm at the first connection point.
[0008] In an optional embodiment, the length of the connecting arm is greater than the height of the working platform.
[0009] In an optional embodiment, the connecting rod assembly includes a first connecting rod, a second connecting rod and a third connecting rod, one end of which is rotatably connected to the third connecting point, the other end of the first connecting rod is rotatably connected to the fixed arm at the fourth connecting point, the other end of the second connecting rod is rotatably connected to the connecting arm at the fifth connecting point, and the other end of the third connecting rod is rotatably connected to the curved arm at the sixth connecting point.
[0010] In an optional embodiment, the first connecting rod, the second connecting rod, the fixed arm and the connecting arm together form a double rocker mechanism.
[0011] In an optional embodiment, the number of the connecting rod assemblies is 2, one of which is connected to one side of the fixed arm, the connecting arm and the curved arm, and the other is connected to the opposite side of the fixed arm, the connecting arm and the curved arm.
[0012] In an optional embodiment, the power unit is a telescopic cylinder, and the body of the telescopic cylinder is rotatably connected to the crank arm, and the output shaft of the telescopic cylinder is rotatably connected to the connecting arm.
[0013] In an optional embodiment, one end of the connecting arm rotatably connected to the fixed arm is embedded in the avoidance space opened by the fixed arm.
[0014] In an optional embodiment, one end of the connecting arm that is rotatably connected to the crank arm is embedded in the avoidance space opened by the crank arm.
[0015] In a second aspect, the utility model provides a fire truck, comprising a double-linkage leveling device as described in any one of the aforementioned embodiments.
[0016] The beneficial effects of the embodiments of the utility model include:
[0017] The utility model provides a double-linkage leveling device and a fire truck, which include a fixed arm, a connecting arm, a crank arm, a power unit and a connecting rod assembly. Based on the above arrangement, the utility model can adjust the linkage structure formed by the fixed arm, the connecting arm, the crank arm and the connecting rod assembly by adjusting the movement of the power unit during the lifting or lowering of the crank arm, so as to overcome the inclination problem between the working platform and the horizontal plane during the movement and ensure the horizontality of the working platform during the rising or falling process. That is to say, the utility model adopts a combination of a power unit and a linkage structure to achieve the leveling of the working platform. Among them, it should be emphasized that since the utility model only adopts one power unit, it saves power costs compared with the commonly used solutions. Moreover, based on this, its leveling logic actions and procedures are simple, which reduces the probability of program problems, shortens the debugging time, and reduces time costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0019] Figure 1 A schematic diagram of the connection between the double-linkage leveling device and the working platform provided in an embodiment of the utility model;
[0020] Figure 2 Another schematic diagram of the connection between the double-linkage leveling device and the working platform provided by the embodiment of the utility model;
[0021] Figure 3 A schematic diagram of the connecting arm structure provided by an embodiment of the utility model;
[0022] Figure 4 Another structural schematic diagram of the connecting arm provided by the embodiment of the utility model;
[0023] Figure 5 A schematic diagram of the fixed arm structure provided by an embodiment of the utility model;
[0024] Figure 6 Another structural schematic diagram of the fixed arm provided by the embodiment of the utility model;
[0025] Figure 7 A schematic diagram of the crank arm provided in the embodiment of the utility model when it is rotated 90°;
[0026] Figure 8 A schematic diagram of the crank arm provided in the embodiment of the utility model when it is rotated 180°;
[0027] Fig. 9 This is a simplified diagram of the crank arm provided in the embodiment of the utility model when it is rotated 270°.
[0028] Icons: 10-double linkage leveling device; 30-working platform; 100-fixed arm; 110-fixed part; 130-tilted part; 200-connecting arm; 300-crank arm; 400-power unit; 500-connecting rod assembly; 510-first connecting rod; 530-second connecting rod; 550-third connecting rod; 610-first connecting point; 620-second connecting point; 630-third connecting point; 640-fourth connecting point; 650-fifth connecting point; 660-sixth connecting point. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] 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 present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0033] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0035] Figure 1 This is a schematic diagram of the connection between the double-linkage leveling device 10 and the working platform 30 provided in the embodiment of the utility model. Figure 2 For another schematic diagram of the connection between the double linkage leveling device 10 and the working platform 30 provided in the embodiment of the utility model, please refer to Figure 1 and Figure 2 The utility model provides a double-linkage leveling device 10 , which includes a fixed arm 100 , a connecting arm 200 , a crank arm 300 , a power unit 400 and a connecting rod assembly 500 .
[0036] Among them, the fixed arm 100 is used to connect with the working platform 30, one end of the connecting arm 200 is rotatably connected to the fixed arm 100 at the first connection point 610, and the other end is rotatably connected to the curved arm 300 at the second connection point 620, and the first connection point 610 is at the same height as the bottom wall of the working platform 30 in a horizontal position, the connecting rod assembly 500 is connected to the fixed arm 100, the connecting arm 200 and the curved arm 300 to form a linkage structure, and one end of the power unit 400 is rotatably connected to the curved arm 300, and the other end is rotatably connected to the connecting arm 200.
[0037] Based on the above arrangement, the utility model can adjust the linkage structure formed by the fixed arm 100, the connecting arm 200, the crank arm 300 and the connecting rod assembly 500 by adjusting the movement of the power unit 400 during the lifting or lowering process of the crank arm 300, thereby overcoming the inclination problem between the working platform 30 and the horizontal plane during the movement process and ensuring the horizontality of the working platform 30 during the rising or lowering process. In other words, the utility model adopts a combination of a power unit 400 and a linkage structure to achieve the leveling of the working platform 30.
[0038] It should be emphasized that, since the present invention only uses one power unit 400, it saves power cost compared with the common solution. Moreover, based on this, its leveling logic action and program are simple, which reduces the probability of program bugs, shortens debugging time, and reduces time cost.
[0039] In some embodiments, to facilitate control by the staff, the power unit 400 is a telescopic cylinder, and the body of the telescopic cylinder is rotatably connected to the crank arm 300, and the output shaft of the telescopic cylinder is rotatably connected to the connecting arm 200. Based on this, as the angle of the crank arm 300 is raised or lowered, the staff adaptively controls and adjusts the output shaft of the telescopic cylinder, thereby controlling the stability and levelness of the work platform 30 during the lifting and lowering process. In other embodiments, the power unit 400 can also be set as an electric push rod or other power structure.
[0040] It is worth noting that see Figure 3 and Figure 4 Since the connecting arm 200 is an important structure for transmitting the force in the linkage structure, in order to avoid interference or collision between the connecting arm 200 and other structures during the adjustment process, one end of the connecting arm 200 that is rotatably connected to the fixed arm 100 is embedded in the avoidance space opened by the fixed arm 100. In addition, one end of the connecting arm 200 that is rotatably connected to the curved arm 300 is embedded in the avoidance space opened by the curved arm 300.
[0041] Based on the above arrangement, it can be understood that one end of the connecting arm 200 can rotate freely in the escape space provided by the fixed arm 100, and the other end can rotate freely in the escape space provided by the crank arm 300, thereby ensuring the smooth transmission of the driving force. Moreover, the escape space provided by both the fixed arm 100 and the crank arm 300 can limit and prevent the connecting arm 200 from falling off to a certain extent, while ensuring the compactness of the double linkage device structure.
[0042] Furthermore, in order to increase the working range and working height of the double-linkage leveling device 10, the length of the connecting arm 200 is greater than the height of the working platform 30. It can be understood that since the first connection point 610 formed by the rotational connection between the fixed arm 100 and the connecting arm 200 is at the same horizontal height as the bottom wall of the working platform 30 in a horizontal position, and since the height of the connecting arm 200 is greater than the height of the working platform 30, the transmission path of the power unit 400 is increased, thereby increasing the working range and working height of the double-linkage leveling device 10 when adjusting the angle.
[0043] Next, the fixed arm 100 is explained. For the specific structure of the fixed arm 100, please refer to Figure 5 and Figure 6In order to avoid interference or collision between the working platform 30 and the connecting arm 200, the fixed arm 100 includes a fixed portion 110 and an inclined portion 130. One side of the fixed portion 110 is used to connect with the side wall of the working platform 30, and the other side is connected to the inclined portion 130. The inclined portion 130 is inclined toward the bottom wall of the working platform 30, and the inclined portion 130 is rotatably connected to the connecting arm 200 at the first connection point 610.
[0044] Based on the above configuration, it can be understood that the fixing portion 110 not only realizes the connection with the working platform 30, but also separates the working platform 30 from the inclined portion 130 connected to the connecting arm 200, and provides a certain distance between the working platform 30 and the connecting arm 200 to avoid collision between the two. In addition, it should be noted that in order to save costs and simplify the design, the fixing portion 110 is connected to the portion of the working platform 30 close to the side wall and the bottom wall.
[0045] Please refer again Figure 2 , Figure 4 and Figure 6 Since the fixed arm 100, the connecting arm 200 and the curved arm 300 are all arm-shaped structures with a certain thickness, in order to ensure the coordination of the two sides of the above-mentioned arm-shaped structures during the transmission process, the number of the connecting rod assemblies 500 is 2, one of which is connected to one side of the fixed arm 100, the connecting arm 200 and the curved arm 300, and the other is connected to the opposite side of the fixed arm 100, the connecting arm 200 and the curved arm 300. In other words, the side wall of the fixed arm 100, the side wall of the connecting arm 200 and the side wall of the curved wall connected by one connecting rod assembly 500 are the side walls of the same side.
[0046] Please refer again Figure 1 As an optional embodiment, in order to further improve the stability of the working platform 30 during movement, the connecting rod assembly 500 includes a first connecting rod 510, a second connecting rod 530 and a third connecting rod 550, one end of which is rotatably connected to the third connecting point 630, the other end of the first connecting rod 510 is rotatably connected to the fixed arm 100 at the fourth connecting point 640, the other end of the second connecting rod 530 is rotatably connected to the connecting arm 200 at the fifth connecting point 650, and the other end of the third connecting rod 550 is rotatably connected to the curved arm 300 at the sixth connecting point 660.
[0047] To facilitate Figure 1 Accordingly, the first connection point 610 is Figure 1 The second connection point 620 is point B shown in FIG. Figure 1 The third connection point 630 is Figure 1 The fourth connection point 640 is Figure 1 Point A shown, the fifth connection point 650 is Figure 1 The sixth connection point 660 is Figure 1 Point F is shown.
[0048] That is to say, the first connecting rod 510, the second connecting rod 530, the fixed arm 100 and the connecting arm 200 together form a first four-bar mechanism, which is specifically as follows: Figure 1 The second connecting rod 530, the third connecting rod 550, the connecting arm 200 and the crank arm 300 together form a second four-bar mechanism, which is specifically as follows Figure 1 The CDEF four-bar mechanism shown.
[0049] It can be understood that the ABCD four-bar mechanism is linked with the CDEF four-bar mechanism, and when the telescopic cylinder is fine-tuned, the ABCE four-bar mechanism and the CDEF four-bar mechanism amplify the angle change in the transmission process to achieve large-angle adjustment of the adjustment platform. That is, under the drive of a power unit 400, the EFDC connecting rod mechanism is linked, and then the ABCD connecting rod mechanism is linked, thereby achieving the leveling of the working platform 30.
[0050] Specifically, the power unit 400 provides power to make the connecting arm 200 rotate around the second connection point 620 (i.e., point E). Afterwards, as the connecting arm 200 rotates, the EEDC linkage also moves in conjunction, and the linkage of the EFDC drives the third link 550 to rotate around the sixth connection point 660 (i.e., point F) on the crank arm 300, thereby providing power to the ABCD four-bar mechanism, so that the ABCD four-bar mechanism moves in conjunction, thereby leveling the working platform 30.
[0051] For the convenience of adjustment, the first connecting rod 510, the second connecting rod 530, the fixed arm 100 and the connecting arm 200 together form a double rocker mechanism. Figure 1 As shown, in order to form a double rocker mechanism, the spacing relationship between each connection point is CD>AD>AB>BC, BC+CD>AD+AB. At this time, no matter which rod among the first connecting rod 510, the second connecting rod 530, the fixed arm 100 and the connecting arm 200 is used as the frame, the ABCD four-bar mechanism is a double rocker mechanism.
[0052] Taking this embodiment as an example, the working process and working principle of the double-linkage leveling device 10 provided by the utility model are as follows:
[0053] When the crank arm 300 is lifted, the working platform 30 tilts, and the double linkage leveling device 10 starts to work. The power unit 400 drives the connecting arm 200 to rotate around the second connection point 620 (i.e., point E), so that one end of the third connecting rod 550 in the EFDC connecting rod mechanism rotates around the sixth connection point 660 (i.e., point F) on the crank arm 300, and the other end pushes the ABCD four-bar mechanism through the third connection point 630 (i.e., point D), thereby causing the fixed arm 100 to rotate around the first connection point 610 (i.e., point B) on the connecting arm 200, so that the working platform 30 remains horizontal. As the crank arm 300 rotates to 90°, the connecting arm 200 passes through the following Figure 7 The crank arm 300 rotates to 180°, and the connecting arm 200 passes through Figure 8 The crank arm 300 rotates to 270°, and the connecting arm 200 finally reaches Fig. 9 The limit position shown is to illustrate that, in actual operation, the angle range of the crank arm 300 is 0° to 270°. In addition, since the lowering process of the crank arm 300 is opposite to the adjustment of the above-mentioned lifting process, it will not be repeated here.
[0054] In summary, the utility model provides a double linkage leveling device 10, which includes a fixed arm 100, a connecting arm 200, a crank arm 300, a power unit 400 and a connecting rod assembly 500. Based on the above settings, the utility model can adjust the linkage structure formed by the fixed arm 100, the connecting arm 200, the crank arm 300 and the connecting rod assembly 500 by adjusting the movement of the power unit 400 during the lifting or lowering of the crank arm 300, so as to overcome the inclination problem between the working platform 30 and the horizontal plane during the movement, and ensure the horizontality of the working platform 30 during the rising or falling process. That is to say, the utility model adopts a combination of a power unit 400 and a linkage structure to achieve the leveling of the working platform 30. Among them, it should be emphasized that since the utility model only adopts one power unit 400, it saves power costs compared with the commonly used solutions. Moreover, based on this, its leveling logic action and program are simple, which reduces the probability of program problems, shortens the debugging time, and reduces time costs.
[0055] In addition, the utility model also provides a fire truck, which includes the double-linkage leveling device 10 in the above embodiment. Therefore, the fire truck can also simplify the leveling logic actions and procedures, reduce the probability of program problems, shorten the debugging time, and reduce time costs.
[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A double linkage leveling device, characterized in that: The invention comprises a fixed arm (100), a connecting arm (200), a curved arm (300), a power unit (400) and a connecting rod assembly (500), wherein the fixed arm (100) is used to be connected to a working platform (30), one end of the connecting arm (200) is rotatably connected to the fixed arm (100) at a first connecting point (610), and the other end is rotatably connected to the curved arm (300) at a second connecting point (620), and the first connecting point (610) is at the same height as the bottom wall of the working platform (30) in a horizontal position, the connecting rod assembly (500) is connected to the fixed arm (100), the connecting arm (200) and the curved arm (300) to form a linkage structure, and one end of the power unit (400) is rotatably connected to the curved arm (300), and the other end is rotatably connected to the connecting arm (200).
2. The double linkage leveling device according to claim 1, characterized in that: The fixed arm (100) comprises a fixed portion (110) and an inclined portion (130); one side of the fixed portion (110) is used to be connected to the side wall of the working platform (30), and the other side is connected to the inclined portion (130); the inclined portion (130) is inclined toward the bottom wall of the working platform (30); and the inclined portion (130) is rotatably connected to the connecting arm (200) at a first connecting point (610).
3. The double linkage leveling device according to claim 1, characterized in that: The length of the connecting arm (200) is greater than the height of the working platform (30).
4. The double linkage leveling device according to claim 1, characterized in that: The connecting rod assembly (500) includes a first connecting rod (510) having one end rotatably connected to a third connecting point (630), a second connecting rod (530) and a third connecting rod (550), the other end of the first connecting rod (510) being rotatably connected to the fixed arm (100) at a fourth connecting point (640), the other end of the second connecting rod (530) being rotatably connected to the connecting arm (200) at a fifth connecting point (650), and the other end of the third connecting rod (550) being rotatably connected to the curved arm (300) at a sixth connecting point (660).
5. The double linkage leveling device according to claim 4, characterized in that: The first connecting rod (510), the second connecting rod (530), the fixed arm (100) and the connecting arm (200) together form a double rocker mechanism.
6. The double linkage leveling device according to claim 1, characterized in that: The number of the connecting rod assemblies (500) is two, one of the connecting rod assemblies (500) is connected to one side of the fixed arm (100), the connecting arm (200) and the curved arm (300), and the other connecting rod assembly (500) is connected to the opposite side of the fixed arm (100), the connecting arm (200) and the curved arm (300).
7. The double linkage leveling device according to claim 1, characterized in that: The power unit (400) is a telescopic oil cylinder, and the body of the telescopic oil cylinder is rotatably connected to the crank arm (300), and the output shaft of the telescopic oil cylinder is rotatably connected to the connecting arm (200).
8. The double linkage leveling device according to any one of claims 1 to 7, characterized in that: One end of the connecting arm (200) rotatably connected to the fixed arm (100) is embedded in an escape space provided in the fixed arm (100).
9. The double linkage leveling device according to any one of claims 1 to 7, characterized in that: One end of the connecting arm (200) rotatably connected to the curved arm (300) is embedded in an escape space provided in the curved arm (300).
10. A fire truck, characterized in that: It comprises a double-linkage leveling device as described in any one of claims 1 to 9.