Rotary table ladder stand structure and fire fighting truck

Abstract

The utility model provides a rotary table ladder stand structure and a fire fighting truck, the rotary table ladder stand structure comprises a rotary table body used for connecting an arm support and a frame, and the arm support can rotate relative to the frame through the rotary table body; the connecting assembly is connected with the rotary table body; and the crawling ladder is rotationally connected with the connecting assembly, and the crawling ladder can rotate relative to the rotary table body through the connecting assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of fire trucks, in particular to a turntable ladder structure and a fire truck. Background Art

[0002] In the fire truck of the related art, the ladder on the turntable is a fixed structure, and when the arm rotates relative to the frame through the turntable, the ladder will also rotate with the turntable. In this process, the fixed ladder is easy to interfere with the water tank on the frame or the water pipe on the turntable. Utility Model Content

[0003] In order to solve or improve at least one of the above-mentioned technical problems, one object of the utility model is to provide a turntable ladder structure.

[0004] Another object of the utility model is to provide a fire truck with the above-mentioned turntable ladder structure.

[0005] To achieve the above-mentioned purpose, the first aspect of the utility model provides a turntable ladder structure, including: a turntable body, used to connect the arm and the frame, and the arm can be rotated relative to the frame through the turntable body; a connecting assembly, connected to the turntable body; a ladder, rotatably connected to the connecting assembly, and the ladder can be rotated relative to the turntable body through the connecting assembly.

[0006] According to the technical solution of the turntable ladder structure provided by the utility model, the ladder can be rotated relative to the turntable body, and the staff can adjust the position of the ladder according to different application scenarios or needs, which is more flexible than a fixed ladder. The ladder can be folded up when not in use or after use, and the ladder in the folded state will not interfere with the water tank or other devices on the frame. When the ladder is in the unfolded state, the staff can climb the cloud ladder from the turntable body through the ladder, or return to the turntable body from the cloud ladder through the ladder.

[0007] Specifically, the turntable ladder structure includes a turntable body, a connecting assembly and a ladder. Among them, the turntable body is used to connect the arm and the frame of the fire truck, and the arm can be rotated relative to the frame through the turntable body. Furthermore, the connecting assembly is connected to the turntable body. The ladder is rotatably connected to the connecting assembly. The ladder can be rotated relative to the turntable body through the connecting assembly. Optionally, the turntable body has a first side. The connecting assembly is connected to the first side of the turntable body. Optionally, one end of the connecting assembly is detachably connected to the first side, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0008] Optionally, the ladder can be in a retracted state or an extended state. The ladder can be retracted when not in use or after use, and the retracted ladder will not interfere with the water tank or other devices on the frame. When the ladder is in an extended state, the staff can climb the aerial ladder from the turntable body through the ladder, or return to the turntable body from the aerial ladder through the ladder.

[0009] In the technical solution defined in the utility model, the ladder can rotate relative to the turntable body. According to different application scenarios or requirements, the staff can adjust the position of the ladder, which is more flexible than a fixed ladder. The ladder can be folded up when not in use or after use, and the ladder in the folded state will not interfere with the water tank or other devices on the frame. When the ladder is in the unfolded state, the staff can climb the cloud ladder from the turntable body through the ladder, or return to the turntable body from the cloud ladder through the ladder.

[0010] In some technical solutions, optionally, the connecting assembly includes: a supporting assembly connected to the turntable body, the supporting assembly is rotatably connected to the ladder, and the ladder can be rotated relative to the turntable body through the supporting assembly.

[0011] In this technical solution, the connecting assembly includes a supporting assembly. Specifically, the supporting assembly is connected to the turntable body. Optionally, the supporting assembly is connected to the first side of the turntable body. The supporting assembly is rotatably connected to the ladder. The ladder can be rotated relative to the turntable body through the supporting assembly. Optionally, one end of the supporting assembly is detachably connected to the first side, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement; the other end of the supporting assembly is rotatably connected to the ladder. The main functions of the supporting assembly include: first, it is used to connect the turntable body and the ladder, and the ladder can be flipped around the hinge point; second, the distance between the ladder and the first side is related to the length of the supporting assembly. By increasing the length of the supporting assembly, it can be ensured that the water outlet pipe located on the first side will not interfere with the ladder.

[0012] In some technical solutions, optionally, the support assembly includes: a supporting beam; a connecting flange, which is provided at one end of the supporting beam and is connected to the turntable body; and an articulated seat, which is provided at the other end of the supporting beam and is rotatably connected to the ladder.

[0013] In this technical solution, the support assembly includes a support beam, a connecting flange and a hinged seat. Specifically, the connecting flange is arranged at one end of the support beam. Optionally, the connecting flange and the support beam are relatively fixed by welding, and the processing method is simple. Optionally, the connecting flange and the support beam are an integrated structure, which has good mechanical properties and high connection strength compared to the post-processing method, which is beneficial to improving assembly efficiency. Further, the connecting flange is connected to the first side surface of the turntable body. Optionally, the connecting flange is connected to a support connecting base arranged on the first side surface. By providing the connecting flange, on the first aspect, a detachable connection between the support assembly and the first side surface can be achieved; on the second aspect, the contact area between the support assembly and the first side surface in a connected state can be increased, which is beneficial to improving the connection strength.

[0014] Furthermore, an articulated seat is provided at the other end of the supporting crossbeam. Optionally, the articulated seat and the supporting crossbeam are relatively fixed by welding, and the processing method is simple. Optionally, the articulated seat and the supporting crossbeam are an integrated structure, which has good mechanical properties and high connection strength compared to the post-processing method, and is conducive to improving assembly efficiency. Further, the articulated seat is rotatably connected to the ladder. Optionally, the articulated seat is rotatably connected to a first articulated ear plate provided on a first column of the ladder. By providing the articulated seat, on the first hand, a rotatable connection between the support assembly and the ladder can be realized; on the second hand, a detachable connection between the support assembly and the ladder can be realized, which is convenient for the staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0015] In some technical solutions, optionally, the turntable ladder structure also includes: a supporting connection base, which is arranged on the turntable body, and the supporting connection base is connected to the connecting flange.

[0016] In the technical solution, the turntable ladder structure also includes a support connection base. Specifically, the support connection base is provided on the turntable body. The support connection base is connected to the connection flange. By providing the support connection base, on the first hand, the first side surface of the turntable body and the support assembly can be detachably connected; on the second hand, the contact area between the first side surface and the support assembly in the connected state can be increased, which is conducive to improving the connection strength. Optionally, the support connection base is provided at a first position on the first side surface.

[0017] In some technical solutions, optionally, the connecting assembly includes: a connecting rod assembly, which is rotatably connected to the turntable body, and the connecting rod assembly is rotatably connected to the ladder.

[0018] In this technical solution, the connecting assembly includes a connecting rod assembly. Specifically, the connecting rod assembly is rotatably connected to the turntable body, and the connecting rod assembly is rotatably connected to the ladder. By providing the connecting rod assembly, the ladder and the turntable body can be rotatably connected.

[0019] In some technical solutions, optionally, the connecting assembly further includes: a first elastic member connected to the turntable body, and the first elastic member is connected to the connecting rod assembly.

[0020] In the technical solution, the connecting assembly further comprises a first elastic member. Specifically, the first elastic member is connected to the turntable body, and the first elastic member is connected to the connecting rod assembly. The first elastic member has a tendency to retract the ladder from the unfolded state to the retracted state.

[0021] In some technical schemes, optionally, the connecting rod assembly includes: a first connecting rod, one end of which is rotatably connected to the turntable body; a second connecting rod, one end of which is rotatably connected to the other end of the first connecting rod, and the other end of the second connecting rod is rotatably connected to the ladder; wherein the other end of the first elastic member is connected to the first connecting rod or the second connecting rod.

[0022] In this technical solution, the connecting rod assembly includes a first connecting rod and a second connecting rod. One end of the first connecting rod is rotatably connected to the first side surface of the turntable body. One end of the second connecting rod is rotatably connected to the other end of the first connecting rod, and the other end of the second connecting rod is rotatably connected to the ladder. Optionally, one end of the first elastic member is connected to the first side surface of the turntable body, and the other end of the first elastic member is connected to the first connecting rod. Optionally, the first connecting rod is a short connecting rod, and the second connecting rod is a long connecting rod. Optionally, when the ladder is in a retracted state, the angle between the first connecting rod and the second connecting rod is an acute angle, and the two are in a folded state. Optionally, when the ladder is in an unfolded state, the center line of the first connecting rod coincides with the center line of the second connecting rod.

[0023] Optionally, the position where the first elastic member is connected to the first side is arranged between the position where the support assembly is connected to the first side and the position where the first connecting rod is rotationally connected to the first side. Optionally, the first side has a first position, a second position and a third position. The support assembly is connected to the first position; one end of the first elastic member is connected to the second position; one end of the first connecting rod is rotationally connected to the third position. The second position is arranged between the first position and the third position. This design ensures that the first elastic member has a tendency to retract the ladder from the second station to the first station. Optionally, the turntable ladder structure also includes a locking assembly. The locking assembly is arranged on the connecting rod assembly. When the ladder is in the second station, the locking assembly is used to limit the relative rotation of the first connecting rod and the second connecting rod.

[0024] In some technical solutions, optionally, the turntable ladder structure also includes: a connecting rod base, which is provided on the turntable body, and one end of the first connecting rod is rotatably connected to the connecting rod base; an elastic member base, which is provided on the turntable body, and the elastic member base is connected to one end of the first elastic member.

[0025] In this technical solution, the turntable ladder structure also includes a connecting rod base and an elastic member base. Specifically, the connecting rod base is arranged on the first side surface of the turntable body. One end of the first connecting rod is rotatably connected to the connecting rod base. By setting the connecting rod base, on the first aspect, the first connecting rod can be rotatably connected to the first side surface; on the second aspect, the first connecting rod can be detachably connected to the first side surface, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement. Optionally, the connecting rod base is arranged at a third position on the first side surface. Optionally, a limit plate is provided on the connecting rod base, and the limit plate is used to limit the rotation range of the first connecting rod to avoid motion interference with the first side surface during the rotation of the first connecting rod.

[0026] Further, the elastic member base is arranged on the first side surface of the turntable body, and the elastic member base is connected to one end of the first elastic member. By providing the elastic member base, the first elastic member can be detachably connected to the first side surface, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement. Optionally, the elastic member base is arranged at a second position of the first side surface.

[0027] Optionally, the elastic member base is arranged between the supporting connection base and the connecting rod base. This design ensures that the first elastic member has a tendency to retract the ladder from the unfolded state to the retracted state.

[0028] In some technical solutions, optionally, an elastic member mounting seat is provided on the first connecting rod, and the elastic member mounting seat is connected to the other end of the first elastic member.

[0029] In this technical solution, by providing an elastic member mounting seat, a detachable connection between the first connecting rod and the first elastic member can be achieved, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0030] The second aspect of the utility model provides a fire truck, comprising: a vehicle frame; a turntable ladder structure in any of the above technical solutions, which is arranged on the vehicle frame; and an arm, one end of which is connected to a turntable body of the turntable ladder structure.

[0031] According to the technical solution of the fire truck of the utility model, the fire truck includes a vehicle frame, a turntable ladder structure and an arm frame in any of the above technical solutions. The turntable ladder structure is arranged on the vehicle frame. One end of the arm frame is connected to the turntable body of the turntable ladder structure. The turntable body of the turntable ladder structure is used to connect the arm frame and the vehicle frame, and the arm frame can be rotated relative to the vehicle frame through the turntable body.

[0032] Optionally, a ladder is provided on the arm. Optionally, when the ladder is in the unfolded state, the ladder is parallel or nearly parallel to the ladder. The ladder at the second workstation can be connected to the walkway of the turntable body and the ladder, so as to facilitate the staff to climb.

[0033] Among them, since the fire truck includes any turntable ladder structure in the above-mentioned first aspect, it has the beneficial effects of any of the above-mentioned technical solutions, which will not be repeated here.

[0034] Additional aspects and advantages of the technical solution of the present invention will become apparent in the following description or will be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 A schematic diagram of a turntable ladder structure according to an embodiment of the utility model is shown;

[0036] Figure 2 A schematic diagram of a turntable ladder structure according to another embodiment of the utility model is shown;

[0037] Figure 3 A schematic diagram of a turntable ladder structure according to another embodiment of the utility model is shown;

[0038] Figure 4 A schematic diagram of a turntable body according to an embodiment of the utility model is shown;

[0039] Figure 5 A schematic diagram of a connecting rod base according to an embodiment of the utility model is shown;

[0040] Figure 6 A schematic diagram of a support assembly according to an embodiment of the utility model is shown;

[0041] Figure 7 A schematic diagram of a ladder according to an embodiment of the utility model is shown;

[0042] Figure 8 A schematic diagram of a connecting rod assembly according to an embodiment of the utility model is shown;

[0043] Fig. 9 A schematic diagram of a locking assembly according to an embodiment of the utility model is shown;

[0044] Fig.10 A schematic diagram of a fire truck according to an embodiment of the utility model is shown;

[0045] Fig.11 A schematic diagram of a fire truck according to another embodiment of the utility model is shown.

[0046] in, Figures 1 to 11 The corresponding relationship between the reference numerals and the component names is as follows:

[0047] 100: turntable ladder structure; 110: turntable body; 111: first side; 120: support assembly; 121: support beam; 122: connection flange; 123: hinged seat; 130: ladder; 131: first column; 1311: first hinged ear plate; 132: second column; 1321: second hinged ear plate; 133: third column; 1331: first end; 1332: second end; 134: anti-slip ladder stool; 140: connecting rod assembly; 141: first connecting rod; 1411: first locking hole; 1412: Elastic member mounting seat; 142: second connecting rod; 1421: second locking hole; 1422: storage chamber; 150: first elastic member; 161: support connection base; 162: connecting rod base; 1621: limit plate; 163: elastic member base; 170: locking assembly; 171: mounting plate; 172: locking member; 1721: pull rod; 1722: buckle; 1723: lock core; 1724: second elastic member; 180: connecting assembly; 200: fire truck; 210: frame; 220: arm; 230: ladder. DETAILED DESCRIPTION

[0048] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0049] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the embodiments of the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0050] Refer to the following Figures 1 to 11 The following describes a turntable ladder structure 100 and a fire truck 200 provided according to some embodiments of the present invention.

[0051] In one embodiment according to the present invention, Figure 1 and Figure 2 As shown, the turntable ladder structure 100 includes a turntable body 110, a connecting assembly 180 and a ladder 130. Fig.10 and Fig.11 As shown, the turntable body 110 is used to connect the arm 220 and the frame 210 of the fire truck 200, and the arm 220 can be rotated relative to the frame 210 through the turntable body 110. Further, the connecting assembly 180 is connected to the turntable body 110. The ladder 130 is rotatably connected to the connecting assembly 180. The ladder 130 can be rotated relative to the turntable body 110 through the connecting assembly 180. Figure 1 , Figure 2 and Figure 3 As shown, the turntable body 110 has a first side surface 111. The connecting assembly 180 is connected to the first side surface 111 of the turntable body 110. Optionally, one end of the supporting assembly 120 is detachably connected to the first side surface 111, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0052] Optionally, the ladder 130 can be in a stowed state or an unfolded state. Figure 2 As shown, the ladder 130 can be folded up when not in use or after use, and the folded ladder 130 will not interfere with the water tank or other devices on the frame 210. Optionally, a ladder 230 is provided on the arm 220. When the ladder 130 is in the unfolded state, the ladder 130 is parallel or nearly parallel to the ladder 230. Figure 1 As shown, the ladder 130 in the unfolded state can connect the walkway of the turntable body 110 and the ladder 230, so as to facilitate the staff to climb. When the ladder 130 is in the unfolded state, the staff can climb the ladder 230 from the turntable body 110 through the ladder 130, or return to the turntable body 110 through the ladder 130 from the ladder 230.

[0053] In the technical solution defined by the utility model, the ladder 130 can rotate relative to the turntable body 110. According to different application scenarios or requirements, the staff can adjust the position of the ladder 130, which is more flexible than the fixed ladder 130. The ladder 130 can be folded when not in use or after use, and the ladder 130 in the folded state will not interfere with the water tank or other devices on the frame 210. When the ladder 130 is in the unfolded state, the staff can climb the ladder 230 from the turntable body 110 through the ladder 130, or return to the turntable body 110 from the ladder 230 through the ladder 130.

[0054] In some embodiments, optionally, Figure 1 , Figure 2 and Figure 3As shown, the connection assembly 180 includes a support assembly 120. Specifically, the support assembly 120 is connected to the turntable body 110. Optionally, the support assembly 120 is connected to the first side 111 of the turntable body 110. The support assembly 120 is rotatably connected to the ladder 130. The ladder 130 can be rotated relative to the turntable body 110 through the support assembly 120. Optionally, one end of the support assembly 120 is detachably connected to the first side 111, which is convenient for the staff to disassemble and assemble, and is conducive to maintenance or replacement; the other end of the support assembly 120 is rotatably connected to the ladder 130. The main functions of the support assembly 120 include: first, it is used to connect the turntable body 110 and the ladder 130, and the ladder 130 can be turned around the hinge point; second, the distance between the ladder 130 and the first side 111 is related to the length of the support assembly 120. By increasing the length of the support assembly 120, it can be ensured that the water outlet pipe located on the first side 111 will not interfere with the ladder 130.

[0055] In some embodiments, optionally, Figure 3 and Figure 6 As shown, the support assembly 120 includes a support beam 121, a connecting flange 122 and a hinge seat 123. Specifically, the connecting flange 122 is arranged at one end of the support beam 121. Optionally, the connecting flange 122 and the support beam 121 are relatively fixed by welding, and the processing method is simple. Optionally, the connecting flange 122 and the support beam 121 are an integrated structure, which has good mechanical properties and high connection strength compared to the post-processing method, which is conducive to improving assembly efficiency. Further, the connecting flange 122 is connected to the first side 111. Optionally, the connecting flange 122 is connected to the support connection base 161 arranged on the first side 111. By setting the connecting flange 122, on the first hand, the detachable connection between the support assembly 120 and the first side 111 can be realized; on the second hand, the contact area between the support assembly 120 and the first side 111 in the connected state can be increased, which is conducive to improving the connection strength.

[0056] Further, the articulated seat 123 is arranged at the other end of the supporting beam 121. Optionally, the articulated seat 123 and the supporting beam 121 are relatively fixed by welding, and the processing method is simple. Optionally, the articulated seat 123 and the supporting beam 121 are an integrated structure, which has good mechanical properties and high connection strength compared to the post-processing method, which is conducive to improving assembly efficiency. Further, the articulated seat 123 is rotatably connected to the ladder 130. Optionally, the articulated seat 123 is rotatably connected to the first articulated ear plate 1311 provided on the first column 131 of the ladder 130. By providing the articulated seat 123, on the first hand, the rotatable connection between the support assembly 120 and the ladder 130 can be realized; on the second hand, the detachable connection between the support assembly 120 and the ladder 130 can be realized, which is convenient for the staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0057] In some embodiments, optionally, Figure 3 and Figure 4 As shown, the turntable ladder structure 100 also includes a support connection base 161. Specifically, the support connection base 161 is provided on the first side 111 of the turntable body 110, and the support connection base 161 is connected to the connection flange 122 of the support assembly 120. By providing the support connection base 161, on the first hand, the first side 111 of the turntable body 110 and the support assembly 120 can be detachably connected; on the second hand, the contact area between the first side 111 and the support assembly 120 in the connected state can be increased, which is conducive to improving the connection strength. Optionally, the support connection base 161 is provided at the first position of the first side 111.

[0058] In some embodiments, optionally, Figure 1 and Figure 3 As shown, the connection assembly 180 includes a connecting rod assembly 140. Specifically, the connecting rod assembly 140 is rotatably connected to the turntable body 110, and the connecting rod assembly 140 is rotatably connected to the ladder 130. By providing the connecting rod assembly 140, the rotatable connection between the ladder 130 and the turntable body 110 can be achieved.

[0059] In some embodiments, optionally, Figure 1 , Figure 2 and Figure 3 As shown, the connection assembly 180 further includes a first elastic member 150. Specifically, the first elastic member 150 is connected to the turntable body 110, and the first elastic member 150 is connected to the connecting rod assembly 140. The first elastic member 150 has a tendency to retract the ladder 130 from the unfolded state to the retracted state.

[0060] In some embodiments, optionally, Figure 3 and Figure 8 As shown, the connecting rod assembly 140 includes a first connecting rod 141 and a second connecting rod 142. One end of the first connecting rod 141 is rotatably connected to the first side surface 111 of the turntable body 110. One end of the second connecting rod 142 is rotatably connected to the other end of the first connecting rod 141, and the other end of the second connecting rod 142 is rotatably connected to the ladder 130. Optionally, one end of the first elastic member 150 is connected to the first side surface 111 of the turntable body 110, and the other end of the first elastic member 150 is connected to the first connecting rod 141. Optionally, the first connecting rod 141 is a short connecting rod, and the second connecting rod 142 is a long connecting rod. Optionally, when the ladder 130 is in a retracted state, the angle between the first connecting rod 141 and the second connecting rod 142 is an acute angle, and the two are in a folded state. Optionally, when the ladder 130 is in an unfolded state, the center line of the first connecting rod 141 coincides with the center line of the second connecting rod 142.

[0061] Optionally, the position where the first elastic member 150 is connected to the first side surface 111 is set between the position where the support assembly 120 is connected to the first side surface 111 and the position where the first connecting rod 141 is rotatably connected to the first side surface 111. Optionally, the first side surface 111 has a first position, a second position and a third position. The support assembly 120 is connected to the first position; one end of the first elastic member 150 is connected to the second position; one end of the first connecting rod 141 is rotatably connected to the third position. The second position is set between the first position and the third position. This design ensures that the first elastic member 150 has a tendency to retract the ladder 130 from the second station to the first station. Optionally, the turntable ladder structure 100 also includes a locking assembly 170. The locking assembly 170 is set on the connecting rod assembly 140. When the ladder 130 is in the second station, the locking assembly 170 is used to limit the relative rotation of the first connecting rod 141 and the second connecting rod 142.

[0062] In some embodiments, optionally, Figure 3 and Figure 4 As shown, the turntable ladder structure 100 also includes a connecting rod base 162 and an elastic member base 163. Specifically, the connecting rod base 162 is disposed on the first side surface 111 of the turntable body 110. One end of the first connecting rod 141 is rotatably connected to the connecting rod base 162. By providing the connecting rod base 162, on the first hand, the first connecting rod 141 can be rotatably connected to the first side surface 111; on the second hand, the first connecting rod 141 can be detachably connected to the first side surface 111, which is convenient for the staff to disassemble and assemble, and is conducive to maintenance or replacement. Optionally, the connecting rod base 162 is disposed at a third position of the first side surface 111. Optionally, as Figure 5 As shown, a limit plate 1621 is provided on the connecting rod base 162 , and the limit plate 1621 is used to limit the rotation range of the first connecting rod 141 to avoid motion interference between the first connecting rod 141 and the first side surface 111 during the rotation process.

[0063] Further, the elastic member base 163 is disposed on the first side surface 111 of the turntable body 110, and the elastic member base 163 is connected to one end of the first elastic member 150. By providing the elastic member base 163, the first elastic member 150 can be detachably connected to the first side surface 111, which is convenient for the staff to disassemble and assemble, and is conducive to maintenance or replacement. Optionally, the elastic member base 163 is disposed at a second position of the first side surface 111.

[0064] Furthermore, if Figure 3 and Figure 4 As shown, the elastic member base 163 is disposed between the supporting connection base 161 and the connecting rod base 162. This design ensures that the first elastic member 150 has a tendency to retract the ladder 130 from the unfolded state to the retracted state.

[0065] In some embodiments, optionally, Figure 3 and Figure 7 As shown, the ladder 130 includes a first column 131, a second column 132 and a plurality of anti-slip ladder stools 134. Specifically, the first column 131 is rotatably connected to the support assembly 120. Optionally, the first column 131 is rotatably connected to the hinge seat 123 of the support assembly 120. Further, the second column 132 is rotatably connected to the other end of the second connecting rod 142. The second column 132 and the second connecting rod 142 can rotate relative to each other. Further, the number of the anti-slip ladder stools 134 is multiple, and the anti-slip ladder stools 134 are flexibly set according to actual needs. Further, one end of the anti-slip ladder stool 134 is connected to the first column 131, and the other end of the anti-slip ladder stool 134 is connected to the second column 132. The main functions of the anti-slip ladder stool 134 include: first, it is used to connect the first column 131 and the second column 132; second, the staff can step on the anti-slip ladder stool 134 to climb the ladder 130. Optionally, the anti-slip ladder stool 134 is provided with anti-slip grooves for anti-slip.

[0066] In some embodiments, optionally, Figure 3 and Figure 7 As shown, a first hinged ear plate 1311 is provided on the first column 131, and the first column 131 is rotatably connected to the support assembly 120 through the first hinged ear plate 1311. By providing the first hinged ear plate 1311, on the one hand, the first column 131 can be rotatably connected to the support assembly 120; on the other hand, the first column 131 can be detachably connected to the support assembly 120, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0067] In some embodiments, optionally, Figure 3 and Figure 7 As shown, the second column 132 is provided with a second hinged ear plate 1321, and the second column 132 is rotatably connected to the other end of the second connecting rod 142 through the second hinged ear plate 1321. By providing the second hinged ear plate 1321, on the first hand, the second column 132 and the second connecting rod 142 can be rotatably connected; on the second hand, the second column 132 and the second connecting rod 142 can be detachably connected, which is convenient for staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0068] In some embodiments, optionally, Figure 7As shown, the ladder 130 also includes a third column 133. Specifically, the third column 133 has a first end 1331 and a second end 1332 that are arranged opposite to each other. The first end 1331 is connected to one end of the first column 131. Optionally, the third column 133 is an inclined column. Further, the distance between the second end 1332 and the second column 132 is smaller than the distance between the first end 1331 and the second column 132. Optionally, the distance between the third column 133 and the second column 132 gradually decreases from the first end 1331 to the second end 1332. In this design, the third column 133 is arranged at an angle, which is conducive to avoiding the inclined surface or other components of the turntable body 110, and preventing the ladder 130 from motion interference during the rotation process.

[0069] Optionally, the third column 133 is rotatably connected to the first column 131. The third column 133 can be turned upside down, which is equivalent to the third column 133 being relatively fixed to the first column 131, so that the ladder 130 is more flexible and less prone to motion interference.

[0070] In some embodiments, optionally, Figure 1 and Fig. 9 As shown, the turntable ladder structure 100 further includes a locking assembly 170. The locking assembly 170 is disposed on the connecting rod assembly 140. When the ladder 130 is in the second working position, the locking assembly 170 is used to limit the relative rotation of the first connecting rod 141 and the second connecting rod 142. In the initial state of the turntable ladder structure 100, the ladder 130 is in a retracted state, at which time the first connecting rod 141 is tightened under the tension of the first elastic member 150, the ladder 130 is in a retracted state, and the ladder 130 is parallel or nearly parallel to the first side surface 111, and the ladder 130 is perpendicular or nearly perpendicular to the ladder 230. When the ladder 130 is needed, the staff pulls the ladder 130 by hand to overcome the elastic member pulling force of the first elastic member 150 on the first connecting rod 141, so that the ladder 130 is flipped from the stowed state to the deployed state, until the ladder 130 is in the deployed state, and the locking assembly 170 restricts the relative rotation of the first connecting rod 141 and the second connecting rod 142. The ladder 130 cannot continue to rotate, and the staff can climb through the ladder 130. After the rescue is completed and the ladder 130 is used, the staff causes the locking assembly 170 to release the locking state of the first connecting rod 141 and the second connecting rod 142. At this time, the first connecting rod 141 can automatically reset under the pulling force of the first elastic member 150, so that the ladder 130 is flipped from the deployed state to the stowed state.

[0071] In some embodiments, optionally, Fig. 9As shown, the locking assembly 170 includes a mounting plate 171 and a locking member 172. Specifically, the mounting plate 171 is provided on the first connecting rod 141 or the second connecting rod 142. The locking member 172 is penetrated through the mounting plate 171, and the locking member 172 can move relative to the mounting plate 171. The first connecting rod 141 is provided with a first locking hole 1411, and the second connecting rod 142 is provided with a second locking hole 1421. When the ladder 130 is in the unfolded state, the locking member 172 can be penetrated through the first locking hole 1411 and the second locking hole 1421 to limit the relative rotation of the first connecting rod 141 and the second connecting rod 142. At this time, the ladder 130 cannot continue to rotate, and the staff can climb through the ladder 130.

[0072] Alternatively, if Fig. 9 As shown, the second connecting rod 142 has a storage cavity 1422. When the ladder 130 is in the first station, it is in a retracted state, and at least part of the first connecting rod 141 is in the storage cavity 1422 of the second connecting rod 142. By providing the storage cavity 1422, the activity space of the first connecting rod 141 can be reserved, and the space utilization rate can also be improved, and the integration is higher. Optionally, the second connecting rod 142 is a C-shaped channel steel or a U-shaped channel steel. Optionally, the first connecting rod 141 is a tubular structure. The first connecting rod 141 has a first cavity. The first locking hole 1411 is connected to the first cavity. Optionally, the mounting plate 171 is provided on the second connecting rod 142. Optionally, the mounting plate 171 is detachably connected to the second connecting rod 142, which is convenient for the staff to disassemble and assemble the mounting plate 171, which is conducive to maintenance or replacement. Optionally, the locking member 172 includes a pull rod 1721, a lock core 1723 and a second elastic member 1724. The pull rod 1721 is inserted through the mounting plate 171 and the second locking hole 1421, and the pull rod 1721 can move relative to the mounting plate 171. Optionally, the mounting plate 171 has a first side and a second side that are arranged opposite to each other. A buckle 1722 is provided at one end of the pull rod 1721, and the buckle 1722 is arranged on the first side of the mounting plate 171. The lock core 1723 is a lock block, which is sleeved on the pull rod 1721, and the lock core 1723 can move relative to the pull rod 1721. The lock core 1723 is arranged on the second side of the mounting plate 171. The second elastic member 1724 is arranged on the second side of the mounting plate 171. One end of the second elastic member 1724 is connected to the circumferential side wall of the pull rod 1721, and the other end of the second elastic member 1724 is connected to the lock core 1723. When the lock core 1723 moves toward the mounting plate 171 , the length of the second elastic member 1724 decreases; when the lock core 1723 moves away from the mounting plate 171 , the length of the second elastic member 1724 increases.

[0073] In some embodiments, optionally, Figure 8As shown, the first connecting rod 141 is provided with an elastic member mounting seat 1412, and the elastic member mounting seat 1412 is connected to the other end of the first elastic member 150. By providing the elastic member mounting seat 1412, the first connecting rod 141 and the first elastic member 150 can be detachably connected, which is convenient for the staff to disassemble and assemble, and is conducive to maintenance or replacement.

[0074] In one embodiment according to the present invention, Fig.10 and Fig.11 As shown, the fire truck 200 includes a vehicle frame 210, a turntable ladder structure 100 in any of the above embodiments, and an arm 220. The turntable ladder structure 100 is arranged on the vehicle frame 210. One end of the arm 220 is connected to the turntable body 110 of the turntable ladder structure 100. The turntable body 110 of the turntable ladder structure 100 is used to connect the arm 220 and the vehicle frame 210, and the arm 220 can rotate relative to the vehicle frame 210 through the turntable body 110.

[0075] Optionally, a ladder 230 is provided on the arm 220. Optionally, when the ladder 130 is in the unfolded state, the ladder 130 is parallel or nearly parallel to the ladder 230. The ladder 130 in the unfolded state can be connected to the walkway of the turntable body 110 and the ladder 230, so as to facilitate the staff to climb.

[0076] According to the embodiments of the turntable ladder structure and the fire truck of the utility model, the ladder can be rotated relative to the turntable body, and the staff can adjust the position of the ladder according to different application scenarios or requirements, which is more flexible than a fixed ladder. The ladder can be folded up when not in use or after use, and the ladder in the folded state will not interfere with the water tank or other devices on the frame. When the ladder is in the unfolded state, the staff can climb the ladder from the turntable body through the ladder, or return to the turntable body from the ladder through the ladder.

[0077] In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0078] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying 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 unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the present invention.

[0079] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0080] 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 turntable ladder structure, characterized in that: include: A turntable body (110) is used to connect the arm (220) and the frame (210), and the arm (220) can be rotated relative to the frame (210) through the turntable body (110); A connecting assembly (180) connected to the turntable body (110); The ladder (130) is rotatably connected to the connection assembly (180), and the ladder (130) can be rotated relative to the turntable body (110) through the connection assembly (180).

2. The turntable ladder structure according to claim 1, characterized in that: The connection assembly (180) comprises: A support assembly (120) is connected to the turntable body (110), and the support assembly (120) is rotatably connected to the ladder (130). The ladder (130) can be rotated relative to the turntable body (110) through the support assembly (120).

3. The turntable ladder structure according to claim 2, characterized in that: The support assembly (120) comprises: Support beam (121); A connecting flange (122) is provided at one end of the supporting crossbeam (121), and the connecting flange (122) is connected to the turntable body (110); A hinged seat (123) is arranged at the other end of the supporting beam (121), and the hinged seat (123) is rotatably connected to the ladder (130).

4. The turntable ladder structure according to claim 3, characterized in that: Also includes: A supporting and connecting base (161) is provided on the turntable body (110), and the supporting and connecting base (161) is connected to the connecting flange (122).

5. The turntable ladder structure according to any one of claims 1 to 4, characterized in that: The connection assembly (180) comprises: A connecting rod assembly (140) is rotatably connected to the turntable body (110), and the connecting rod assembly (140) is rotatably connected to the ladder (130).

6. The turntable ladder structure according to claim 5, characterized in that: The connection assembly (180) further includes: A first elastic member (150) is connected to the turntable body (110), and the first elastic member (150) is connected to the connecting rod assembly (140).

7. The turntable ladder structure according to claim 6, characterized in that: The connecting rod assembly (140) comprises: A first connecting rod (141), one end of which is rotatably connected to the turntable body (110); a second connecting rod (142), one end of the second connecting rod (142) being rotatably connected to the other end of the first connecting rod (141), and the other end of the second connecting rod (142) being rotatably connected to the ladder (130); Wherein, the other end of the first elastic member (150) is connected to the first connecting rod (141) or the second connecting rod (142).

8. The turntable ladder structure according to claim 7, characterized in that: Also includes: A connecting rod base (162) is provided on the turntable body (110), and one end of the first connecting rod (141) is rotatably connected to the connecting rod base (162); The elastic member base (163) is disposed on the turntable body (110), and the elastic member base (163) is connected to one end of the first elastic member (150).

9. The turntable ladder structure according to claim 7, characterized in that: An elastic member mounting seat (1412) is provided on the first connecting rod (141), and the elastic member mounting seat (1412) is connected to the other end of the first elastic member (150).

10. A fire truck, characterized in that: include: Frame (210); The turntable ladder structure according to any one of claims 1 to 9, arranged on the frame (210); An arm (220), one end of the arm (220) is connected to the turntable body (110) of the turntable ladder structure.

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