Ladder stand and fire truck

Abstract

The utility model relates to fire fighting equipment technical field provides a kind of ladder stand and fire engine, and the turnover device in ladder stand includes mounting frame body, turnover frame body and power-assisted piece, mounting frame body is used to be fixed to fire engine;Turnover frame body is connected with mounting frame body rotation;The one end of power-assisted piece is connected with mounting frame body rotation, other end is connected with turnover frame body rotation;Support frame body is used to carry fire ladder, and support frame body and turnover frame body are movably matched;Manual pull rod is rotatably arranged on support frame body, for pulling turnover frame body relative to mounting frame body between storage state and unfolded state switching.The utility model can realize immediately pulling immediately using, need not rely on external energy or complex transmission system, can improve the deployment efficiency of fire ladder.Meanwhile, introduce gas spring power-assisted piece in turnover device, can reduce the operation difficulty of ladder stand.

Description

Technical Field

[0001] This utility model relates to the field of fire protection equipment technology, and in particular to a ladder frame and a fire truck. Background Technology

[0002] In the fire emergency rescue system, extension ladders serve as supporting equipment for fire trucks or rescue sites. They are mainly used for the rapid storage, fixing, and deployment of fire ladders. Their performance directly affects the deployment efficiency and ease of use of fire ladders. They are key auxiliary devices to ensure that rescue personnel can efficiently carry out tasks such as high-altitude fire fighting, rescue, and demolition.

[0003] Currently, most fire escape ladders on the market use either hydraulic or electric drive to deploy and retract. Hydraulic-driven ladders rely on hydraulic pump stations, hydraulic cylinders, and supporting piping systems, using the flow of hydraulic oil to drive the actuators to complete the action; electric-driven ladders use motors, reducers, and control systems to convert electrical energy into mechanical energy to drive the transmission mechanism.

[0004] While both types of drive systems can achieve automated operation, hydraulic drives require an external power source or rely on the vehicle's hydraulic system. In emergency rescue situations, issues such as power interruption or pipeline leaks can cause operational failures. Furthermore, electric drives have high requirements for power supply stability, and the motor requires a certain amount of time to start and respond, especially in harsh environments such as low temperatures and humidity, where delays can easily occur. The structural complexity of hydraulic and electric drive systems leads to cumbersome deployment processes, often taking several minutes or even longer from starting the drive to completing deployment. Excessive deployment time can severely delay rescue opportunities. Utility Model Content

[0005] This utility model provides a ladder frame and a fire truck to solve the above-mentioned technical defects in the prior art, which can improve the deployment efficiency of fire ladders and reduce the operation difficulty of the ladder frame.

[0006] The first aspect of this utility model provides a pull ladder frame, comprising: The flipping device includes: Mounting frame for securing to the fire truck; The frame is flipped and rotatably connected to the mounting frame. The assistive component has one end rotatably connected to the mounting frame and the other end rotatably connected to the tilting frame; A support frame is used to support the fire ladder, and the support frame is movably connected with the tilting frame; A manual lever, rotatably mounted on the support frame, is used to switch the tilting frame between a stowed state and an unfolded state relative to the mounting frame.

[0007] The extension ladder frame provided by this utility model also includes: An elastic limiting component is provided on the support frame to limit the position of the support frame relative to the flipping frame.

[0008] According to the pull ladder frame provided by this utility model, the elastic limiting component includes: A limiting sleeve is fixedly disposed on both sides of the support frame, and the limiting sleeve has a first limiting end and a second limiting end; An elastic element is sleeved on the limiting sleeve rod; A limiting member is sleeved on the limiting sleeve rod and located on at least one of the elastic member and the first limiting end and the second limiting end. One side of the limiting member abuts against the elastic member, and the other side of the limiting member abuts against the first limiting end or the second limiting end.

[0009] According to the pull ladder frame provided by this utility model, the mounting frame is provided with a first fixing part, and the flipping frame is provided with a second fixing part; When the flip frame is in a retracted state relative to the mounting frame, locking components are connected to the first fixing part and the second fixing part; When the tilting frame is in the unfolded state relative to the mounting frame, traction members are connected to the first fixing part and the second fixing part.

[0010] The extension ladder frame provided by this utility model also includes: A pull rod limiting assembly is provided on the mounting frame or the flipping frame; The manual pull rod is provided with a limiting groove; When the flip frame is in the retracted state relative to the mounting frame, the pull rod limiting component is engaged in the limiting groove.

[0011] According to the ladder frame provided by this utility model, the two ends of the support frame are respectively provided with a first limiting plate and a second limiting plate; the first limiting plate, the second limiting plate and the support frame restrict the accommodating space, and the fire ladder is located in the accommodating space.

[0012] According to the pull ladder frame provided by this utility model, guide wheel sets are provided on both sides of the flip frame, and guide grooves are provided on both sides of the support frame, and the guide wheel sets and the guide grooves are in rolling cooperation.

[0013] According to the ladder frame provided by this utility model, the guide wheel assembly includes: The guide bracket is fixedly mounted on the tilting frame. The first guide wheel is rotatably mounted on the guide bracket and rolls with the guide groove; The second guide wheel is rotatably mounted on the guide bracket and rolls with the guide groove, and the axis of the second guide wheel is perpendicular to the axis of the first guide wheel.

[0014] The extension ladder frame provided by this utility model also includes a support bracket for fixing to a fire truck and is spaced apart from the mounting frame for supporting the support frame. The support frame is equipped with rollers.

[0015] A second aspect of this utility model provides a fire truck, including a vehicle body and a ladder frame as described in any one of the claims, wherein the ladder frame is mounted on the top of the vehicle body.

[0016] The pull-out ladder frame provided by this utility model is equipped with a flipping device, a support frame, and a manual pull rod. The flipping device includes a mounting frame, a flipping frame, and an assistive component. The flipping frame is rotatably connected to the mounting frame, and the assistive component is rotatably connected to both the mounting frame and the flipping frame. The support frame is movably coupled to the flipping frame, and the manual pull rod is rotatably mounted on the support frame for pulling the flipping frame relative to the mounting frame to switch between a retracted state and an extended state.

[0017] This utility model adopts a purely mechanical structure, allowing operators to directly pull a manual lever to drive the support frame and tilting frame, enabling immediate use without relying on external energy or complex transmission systems, thus improving the deployment efficiency of fire ladders. Furthermore, the manual lever remains reliable even in extreme scenarios such as power outages or hydraulic leaks, preventing rescue delays due to power failure.

[0018] Meanwhile, a gas spring assist component is introduced into the flipping device. When the flipping frame rotates from a horizontal to a vertical position, the piston rod of the gas spring gradually extends, providing an auxiliary thrust in the opposite direction of gravity. The magnitude of the thrust can be adjusted by the initial pressure of the gas spring to match different load requirements. When reverse folding is required, the piston rod of the gas spring retracts, providing controllable resistance to prevent excessive flipping speed from causing loss of control. With the assistance of the gas spring, the operator can complete the flipping with a small thrust, reducing the difficulty of operation. Furthermore, the self-locking function of the gas spring prevents the flipping frame from rotating on its own when not in operation, improving safety during storage.

[0019] The fire truck provided by this utility model has all the advantages of the aforementioned ladder frame because it includes the ladder frame. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the pull ladder frame provided in this embodiment of the utility model.

[0022] Figure 2 This is a side view of the pull ladder frame provided in this embodiment of the utility model.

[0023] Figure 3 This is a schematic diagram of the structure (unfolded state) of the flipping device in the ladder frame provided in this embodiment of the utility model.

[0024] Figure 4 This is a side view of the flipping device in the ladder frame provided in this embodiment of the utility model.

[0025] Figure 5 This is a top view of the flipping device in the ladder frame provided in this embodiment of the utility model.

[0026] Figure 6 This is a schematic diagram of another embodiment of the pull ladder frame provided in this utility model.

[0027] Figure 7 yes Figure 6 Enlarged view of part A in the middle.

[0028] Figure 8 This is a schematic diagram of the structure of the flipping device in the pull ladder frame provided in this embodiment of the utility model (in the storage state).

[0029] Figure 9 This is a structural schematic diagram of the fire truck provided in this embodiment of the utility model.

[0030] Figure label: 10. Tilting device; 11. Mounting frame; 111. First fixing part; 12. Tilting frame; 121. Second fixing part; 13. Auxiliary component; 14. Guide wheel assembly; 141. Guide bracket; 142. First guide wheel; 143. Second guide wheel; 20. Support frame; 21. Guide groove; 22. First limiting plate; 23. Second limiting plate; 30. Manual pull rod; 31. Limiting groove; 40. Elastic limiting component; 41. Limiting sleeve; 42. Elastic element; 43. Limiting element; 50. Locking components; 60. Traction components; 80. Support brackets; 81. Idler rollers; 90. Fire trucks. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0033] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0035] Figure 1 This is a schematic diagram of the structure of the pull ladder frame provided in this embodiment of the utility model. Figure 2This is a side view of the pull ladder frame provided in this embodiment of the utility model. Figure 3 This is a schematic diagram of the structure (unfolded state) of the flipping device in the ladder frame provided in this embodiment of the utility model. Figure 4 This is a side view of the flipping device in the ladder frame provided in this embodiment of the utility model. Figure 5 This is a top view of the flipping device in the ladder frame provided in this embodiment of the utility model.

[0036] See Figures 1 to 5 This utility model provides a pull ladder frame, which includes a flipping device 10, a support frame 20 and a manual pull rod 30. The components work together to realize the rapid deployment and convenient storage of the fire ladder.

[0037] The flipping device 10 is used to flip the support frame 20 relative to the fire truck 90, such as flipping the support frame 20 from a horizontally stowed state to an inclined or vertically unfolded state. The flipping device 10 includes a mounting frame 11, a flipping frame 12, and an assistive component 13.

[0038] The mounting frame 11 can be a frame structure welded from metal plates, fixed to the chassis, bulkhead, or roof of the fire truck 90 by high-strength bolts. The tilting frame 12 can be a load-bearing frame welded from rectangular steel pipes. The tilting frame 12 is rotatably connected to the mounting frame 11 via a horizontally set pivot, with both ends of the pivot fixed to the mounting frame 11 via bearing seats. The assisting component 13 can be a gas spring, preferably a self-locking gas spring. Both ends of the assisting component 13 are rotatably connected to the middle of the mounting frame 11 and the tilting frame 12 via hinge seats, respectively, to provide auxiliary thrust or resistance during tilting, reducing the difficulty of operation.

[0039] The support frame 20 is used to directly support the fire ladder. The support frame 20 is movably coupled with the tilting frame 12 to facilitate the retrieval of the fire ladder. The support frame 20 can be a flat plate formed by stamping a single piece of steel plate or a frame structure formed by welding. The support frame 20 can be movably coupled with the tilting frame 12 through the sliding grooves or guide grooves 21 on both sides, allowing the support frame 20 to move along the extension direction of the tilting frame 12 when tilting.

[0040] A manual pull rod 30 is rotatably mounted at the end of the support frame 20, used for manually pulling the tilting frame 12 to switch between a retracted and extended state relative to the mounting frame 11, thus enabling the access of the fire ladder. The manual pull rod 30 can be a galvanized steel pipe, with its top end hinged to the connecting lug of the support frame 20 via a pin, and its end can be equipped with a non-slip handle. A torsion spring can also be installed at the pin, allowing the manual pull rod 30 to hang naturally against the body of the fire truck 90 when not in use.

[0041] When the extension ladder needs to be deployed (i.e., the tilting frame 12 is in the deployed state), the operator pulls the manual lever 30 upwards, causing the manual lever 30 to rotate around the pin and drive the support frame 20 to slide forward along the length direction (i.e., the extension direction) of the tilting frame 12. At the same time, the tilting frame 12 rotates synchronously around the pivot under the auxiliary thrust of the gas spring, gradually tilting from a horizontal state to a vertical state until the support frame 20 is fully deployed. At this point, the fire ladder can be removed from the support frame 20.

[0042] When the pull-out ladder needs to be stored (i.e., the flip-out frame 12 is in the stored state), push the manual pull rod 30 in the opposite direction to drive the support frame 20 to slide backward and push the flip-out frame 12 to fold back to the horizontal state, and finally lock the manual pull rod 30 to achieve quick storage.

[0043] It is understood that the pull ladder frame provided in this embodiment of the present invention, by setting a flipping device 10, a support frame 20 and a manual pull rod 30, and making the flipping device 10 include a mounting frame 11, a flipping frame 12 and an assisting component 13, the flipping frame 12 is rotatably connected to the mounting frame 11, the assisting component 13 is rotatably connected to the mounting frame 11 and the flipping frame 12 respectively, the support frame 20 is movably engaged with the flipping frame 12, and the manual pull rod 30 is rotatably mounted on the support frame 20 for pulling the flipping frame 12 to switch between a retracted state and an unfolded state relative to the mounting frame 11.

[0044] This utility model adopts a purely mechanical structure. The support frame 20 and the tilting frame 12 can be driven by the operator directly pulling the manual lever 30, achieving immediate use without relying on external energy or complex transmission systems, thus improving the deployment efficiency of fire ladders. At the same time, the manual lever can still work reliably in extreme scenarios such as power outages and hydraulic leaks, avoiding rescue delays caused by power failure.

[0045] Meanwhile, a gas spring assist component 13 is introduced into the flipping device 10. When the flipping frame 12 rotates from a horizontal to a vertical position, the piston rod of the gas spring gradually extends, providing an auxiliary thrust opposite to the direction of gravity. The magnitude of the thrust can be adjusted by the initial pressure of the gas spring to match different load requirements. When reverse folding is required, the piston rod of the gas spring retracts, providing controllable resistance to prevent the flipping speed from being too fast and causing loss of control. With the assistance of the gas spring, the operator can complete the flipping with a small thrust, which reduces the difficulty of operation. Furthermore, the self-locking function of the gas spring prevents the flipping frame 12 from rotating on its own when not in operation, improving the safety during storage.

[0046] Figure 6 This is a schematic diagram of another embodiment of the pull ladder frame provided in this utility model. Figure 7 yes Figure 6 Enlarged view of part A in the middle.

[0047] See Figure 6 and Figure 7 In some embodiments of the utility model, the pull ladder frame also includes an elastic limiting component 40, which is disposed on at least one side of the support frame 20 and is used to limit the position of the support frame 20 relative to the flip frame 12. This not only effectively avoids danger caused by excessive impact force during the deployment of the pull ladder frame, but also allows adjustment of the limiting point position, thereby changing the center of gravity of the pull ladder frame and making the deployment or folding process of the pull ladder frame more effortless.

[0048] In some embodiments of this utility model, the elastic limiting components 40 are symmetrically arranged on both sides of the support frame 20, and each set of elastic limiting components 40 includes a limiting sleeve 41, an elastic element 42 and a limiting element 43.

[0049] The limiting sleeve 41 is a metal round tube closed at both ends, which is fixed to the side of the support frame 20 or the guide groove 21 by welding or bolting. The two ends of the limiting sleeve 41 are defined as the first limiting end and the second limiting end, respectively.

[0050] The elastic element 42 can be a spring, and the elastic element 42 is sleeved on the limiting sleeve 41. The limiting element 43 can be a metal plate, and the limiting element 43 is sleeved on the limiting sleeve 41 and located on at least one of the elastic element 42 and the first limiting end and the second limiting end. One side of the limiting element 43 abuts against the elastic element 42, and the other side of the limiting element 43 abuts against the first limiting end or the second limiting end.

[0051] When the operator manually drives the tilting frame 12 from the horizontal folded state to the vertical unfolded state via the lever 30, the support frame 20 will generate a downward inertial impact force due to its own weight (including the load of the fire ladder). At this time, the working process of the elastic limit component 40 is as follows: The support frame 20 begins to move, and the limiting member 43 moves synchronously with the support frame 20. The elastic member 42 is slightly compressed (or stretched), and at this time the gap between the limiting member 43 and the corresponding limiting end gradually narrows.

[0052] When the support frame 20 rotates with the tilting frame 12 to a near-vertical angle, the inertial force of the support frame 20 reaches its maximum value. The limiting member 43 is pushed by the guide bracket 141 of the guide wheel assembly 14 on the tilting frame 12 due to the movement of the support frame 20 and comes into close contact with the corresponding limiting end. At this time, the elastic member 42 is further compressed, and absorbs the kinetic energy of the support frame 20 through elastic deformation, converting the instantaneous impact force into the elastic potential energy of the spring, so as to prevent the support frame 20 from rapidly impacting the tilting frame 12 due to excessive inertia, which would cause the fire ladder to slide or the tilting frame 12 to deform.

[0053] When the support frame 20 is fully extended, the limiting member 43 continues to abut against the corresponding limiting end, and the elastic member 42 remains in an elastic deformation state, providing continuous micro-elastic support for the support frame 20 and buffering the slight vibration caused by changes in the load of the fire ladder.

[0054] When the extension ladder needs to be retracted, the operator pulls the lever in the opposite direction, causing the support frame 20 to rotate from a vertically extended state to a horizontally retracted state. At this time: The support frame 20 generates an upward inertial impact force due to gravity (including the load of the fire ladder). The limiting member 43 moves synchronously with the support frame 20, and the elastic member 42 is compressed (or stretched) in the opposite direction. It absorbs the inertial kinetic energy of the support frame 20 again through elastic deformation, so as to avoid the support frame 20 from colliding violently with the load-bearing bracket 80 below due to rapid storage. The rotating shaft and hinge components of the flipping device 10 are not damaged.

[0055] Figure 8 This is a schematic diagram of the structure (in storage state) of the flipping device 10 in the pull ladder frame provided in this embodiment of the utility model.

[0056] Continue reading Figures 2 to 4 And see also Figure 8 In some embodiments of this utility model, the mounting frame 11 is provided with a first fixing part 111, which is located in the middle of the mounting frame 11 and consists of a pair of symmetrical metal ear plates. The ear plates have circular locking holes or traction holes. The locking holes are used for locking in the retracted state, and the traction holes are used for traction in the unfolded state. The flipping frame 12 is provided with a second fixing part 121, which is located in the middle of the flipping frame 12 and also consists of a pair of symmetrical metal ear plates. The ear plates also have locking holes and traction holes.

[0057] When the tilting frame 12 is in the retracted state relative to the mounting frame 11, a locking element 50 is connected to the first fixing part 111 and the second fixing part 121. The locking element 50 can be a safety lock pin, used to fix the tilting frame 12 and the mounting frame 11, to prevent the tilting frame 12 from unfolding on its own due to vehicle bumps during transportation or in non-use state (such as when the fire truck 90 is in motion), which could lead to accidents such as the fire ladder slipping down.

[0058] When the tilting frame 12 is in the unfolded state relative to the mounting frame 11, a traction member 60 is connected to the first fixing part 111 and the second fixing part 121. The traction member 60 can be a chain, wire rope, or connecting rod, or other structures capable of tensioning. The chain is composed of multiple metal chain links hinged together, allowing for elastic deformation due to slight swaying of the tilting frame 12 during unfolding, thus avoiding stress concentration or breakage of connecting parts caused by rigid traction. In addition, the unfolding angle of the tilting frame 12 can be controlled by changing the effective length of the chain.

[0059] In some embodiments of this utility model, the pull ladder frame further includes a pull rod limiting component, which is disposed on the mounting frame 11 or the flip frame 12. The manual pull rod 30 is provided with a limiting groove 31, and when the flip frame 12 is in a retracted state relative to the mounting frame 11, the pull rod limiting component engages with the limiting groove 31.

[0060] The pull rod limiting component can be a pin or bolt fixed to the mounting frame 11 or the flip frame 12 by the mounting plate. When the pull ladder frame is not used, the bolt is inserted into the limiting groove 31 to achieve the limiting, and the bolt is used to restrict the rotation of the manual pull rod 30.

[0061] Continue reading Figures 1 to 5 And see also Figure 8 In some embodiments of this utility model, guide wheel sets 14 are provided on both sides of the flip frame 12, and guide grooves 21 are provided on both sides of the support frame 20. The guide wheel sets 14 and the guide grooves 21 roll together to avoid problems such as jamming and shaking caused by large friction and poor guidance during the flipping, unfolding or storage of the ladder frame.

[0062] The guide wheel assembly 14 typically consists of 2-4 rolling bearings symmetrically mounted on both sides of the tilting frame 12 via axles, located on the side that contacts the support frame 20. The axles are fixedly connected to the tilting frame 12, and the outer rings of the bearings contact the guide grooves 21. The guide grooves 21 are grooves formed on both sides of the support frame 20, and their cross-sectional shape matches the outer contour of the guide wheels.

[0063] Meanwhile, the cooperation between the guide wheel assembly 14 and the guide groove 21 physically constrains the movement trajectory of the tilting frame 12: the extension direction of the guide groove 21 directly determines the unfolding path of the tilting frame 12, and the contact between the outer ring of the guide wheel and the groove wall can forcibly correct any deviation trend. For example, when the tilting frame 12 tilts to the left, the right guide wheel will be pushed back to the correct position due to the obstruction of the groove wall, ensuring that the tilting frame 12 always moves along the predetermined trajectory and improving the motion accuracy.

[0064] Specifically, the guide wheel assembly 14 includes a guide bracket 141, a first guide wheel 142, and a second guide wheel 143. The guide bracket 141, as the mounting base for the guide wheels, is typically a metal plate and is fixed to the side of the tilting frame 12 by welding or bolts.

[0065] The first guide wheel 142 is rotatably mounted on the guide bracket 141 and rolls with the guide groove 21; the second guide wheel 143 is rotatably mounted on the guide bracket 141 and rolls with the guide groove 21, and the axis of the second guide wheel 143 is perpendicular to the axis of the first guide wheel 142. Both guide wheels are in contact with the inner wall of the guide groove 21 of the support frame 20, and the "one horizontal and one vertical" axis layout forms a constraint on the support frame 20 in two orthogonal directions.

[0066] In this embodiment of the invention, the first guide wheel 142 (horizontal axis) constrains the lateral offset of the support frame 20 in the direction perpendicular to the turning radius, and the second guide wheel 143 (vertical axis) constrains the longitudinal offset of the support frame 20 in the direction parallel to the turning radius. The two guide wheels, through the cooperation of orthogonal axes, form a "cross-shaped" guiding constraint, strictly limiting the movement of the support frame 20 within the predetermined trajectory of the guide groove 21, which can significantly improve movement accuracy.

[0067] Continue reading Figure 1 , Figure 2 and Figure 6 In some embodiments of this utility model, the ladder frame further includes a support bracket 80, which is a U-shaped frame welded from steel plates. The frame has mounting holes at its four corners and is bolted to the body or mounting platform of the fire truck 90. ​​The support bracket 80 and the mounting frame 11 are spaced apart to jointly support the frame 20. Each support bracket 80 is equipped with two rollers 81, symmetrically distributed on each support bracket 80. The two rollers 81 are rotatably mounted on the same roller shaft, which is mounted on the support bracket 80.

[0068] Essentially, a certain gap is maintained between the support bracket 80 and the mounting frame 11, forming multiple support structures. When the support frame 20 is horizontally stored due to the flipping frame 12, the bottom of the support frame 20 contacts the roller 81 of the support bracket 80. At this time, the weight of the support frame 20 is jointly borne by the roller 81, the flipping frame 12, and the mounting frame 11.

[0069] When the flipping bracket is in the unfolded state, the support frame 20 unfolds vertically along with the flipping frame 12, and its bottom is completely separated from the bearing bracket 80, and is supported on the bearing bracket 80 only by the flipping frame 12.

[0070] When the fire truck 90 is moving (such as when it is being transported to a rescue site), the support frame 20 vibrates up and down due to the bumps of the vehicle. The roller 81 rotates to absorb some of the impact energy, so as to avoid excessive impact on the vehicle body.

[0071] Figure 9 This is a structural schematic diagram of the fire truck 90 provided in this embodiment of the utility model.

[0072] See Figure 9 This utility model embodiment also provides a fire truck 90, which includes a vehicle body and a ladder frame provided in any of the above embodiments, with the ladder frame mounted on the top of the vehicle body.

[0073] It is understood that the fire truck 90 provided in this embodiment of the present invention, having included the aforementioned extension ladder frame, possesses all the advantages of the aforementioned extension ladder frame.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pull-out ladder frame, characterized in that, include: The flipping device includes: Mounting frame for securing to the fire truck; The frame is flipped and rotatably connected to the mounting frame. The assistive component has one end rotatably connected to the mounting frame and the other end rotatably connected to the tilting frame; A support frame is used to support the fire ladder, and the support frame is movably connected with the tilting frame; A manual lever, rotatably mounted on the support frame, is used to switch the tilting frame between a stowed state and an unfolded state relative to the mounting frame.

2. The ladder frame according to claim 1, characterized in that, Also includes: An elastic limiting component is provided on the support frame to limit the position of the support frame relative to the flipping frame.

3. The ladder frame according to claim 2, characterized in that, The elastic limiting component includes: A limiting sleeve is fixedly disposed on both sides of the support frame, and the limiting sleeve has a first limiting end and a second limiting end; An elastic element is sleeved on the limiting sleeve rod; A limiting member is sleeved on the limiting sleeve rod and located on at least one of the elastic member and the first limiting end and the second limiting end. One side of the limiting member abuts against the elastic member, and the other side of the limiting member abuts against the first limiting end or the second limiting end.

4. The ladder frame according to claim 1, characterized in that, The mounting frame is provided with a first fixing part, and the flipping frame is provided with a second fixing part; When the flip frame is in a retracted state relative to the mounting frame, locking components are connected to the first fixing part and the second fixing part; When the tilting frame is in the unfolded state relative to the mounting frame, traction members are connected to the first fixing part and the second fixing part.

5. The ladder frame according to claim 1, characterized in that, Also includes: A pull rod limiting assembly is provided on the mounting frame or the flipping frame; The manual pull rod is provided with a limiting groove; When the flip frame is in the retracted state relative to the mounting frame, the pull rod limiting component is engaged in the limiting groove.

6. The ladder frame according to claim 1, characterized in that, The support frame is provided with a first limiting plate and a second limiting plate at both ends; The first limiting plate, the second limiting plate, and the support frame restrict the accommodating space, and the fire ladder is located in the accommodating space.

7. The extension ladder frame according to any one of claims 1 to 6, characterized in that, The two sides of the flipping frame are respectively provided with guide wheel sets, and the two sides of the support frame are respectively provided with guide grooves, and the guide wheel sets and the guide grooves are in rolling cooperation.

8. The ladder frame according to claim 7, characterized in that, The guide wheel assembly includes: The guide bracket is fixedly mounted on the tilting frame. The first guide wheel is rotatably mounted on the guide bracket and rolls with the guide groove; The second guide wheel is rotatably mounted on the guide bracket and rolls with the guide groove, and the axis of the second guide wheel is perpendicular to the axis of the first guide wheel.

9. The ladder frame according to any one of claims 1 to 6, characterized in that, Also includes: A support bracket is used to fix the fire truck and is spaced apart from the mounting frame to support the support frame. The support frame is equipped with rollers.

10. A fire truck, characterized in that, It includes a vehicle body and a ladder frame as described in any one of claims 1 to 9, wherein the ladder frame is mounted on top of the vehicle body.

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