Steel net rack hoisting device with good stabilizing effect

Abstract

The present application relates to steel net rack hoisting technical field, especially to a kind of stable effect good steel net rack hoisting device.A kind of stable effect good steel net rack hoisting device, including crossbeam, connecting seat and steel cable etc., crossbeam top left-right symmetry fixedly connected with connecting seat, two connecting seat are connected with steel cable, the upper end between two steel cables is fixedly connected with lifting ring, crossbeam is left-right symmetry and is provided with adjusting assembly, adjusting assembly is all provided with connecting assembly, two connecting assemblies are all provided with longitudinal beam.The present application makes steel net rack stress uniform by multi-point hoisting, reduces deformation, utilizes pressure sensor to monitor longitudinal beam lifting force in real time, adjusts longitudinal beam position by control module, quickly adjusts steel net rack to horizontal state, without calculating the barycenter position of steel net rack before hoisting, only needs simple visual inspection, greatly saves time and manpower, improves installation efficiency and convenience, and longitudinal beam can be disassembled, convenient for transportation.

Description

Technical Field

[0001] This invention relates to the field of steel space frame hoisting technology, and in particular to a steel space frame hoisting device with good stability. Background Technology

[0002] The in-situ expansion installation technology for large-span steel space frame roofs is an innovative construction technique that integrates high-altitude in-situ unit installation with a progressive expansion assembly strategy. The specific operational process is as follows: First, a steel space frame module is assembled on the ground. Then, using a hoisting device, the module is precisely lifted to the installation location and properly installed. Next, the assembly of the next steel space frame module continues on the ground. After assembly, this module is precisely joined to the already installed modules. Through this cyclical operation, the overall installation of the large-span steel space frame is gradually achieved.

[0003] Specialized lifting equipment is required when hoisting steel space frame modules. However, existing lifting equipment has certain limitations in practical applications. Before the hoisting operation, workers need to invest a significant amount of time and effort in complex calculations to determine the center of gravity of the steel space frame. Subsequently, the lifting equipment must be meticulously adjusted based on the calculation results to ensure that the steel space frame remains horizontally balanced during hoisting, thereby minimizing deformation. This series of operations is not only cumbersome but also demands high levels of professional skills and calculation abilities from the workers, making the entire process time-consuming and labor-intensive. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a steel space frame hoisting device with good stability.

[0005] The technical solution is as follows: A steel space frame hoisting device with good stability includes a crossbeam, connecting seats, steel cables, lifting rings, adjusting components, connecting components, longitudinal beams, detection components, and hoisting components. Connecting seats are symmetrically fixedly connected to the top of the crossbeam, and steel cables are connected to both connecting seats. Lifting rings are fixedly connected between the upper ends of the two steel cables. Adjusting components are symmetrically arranged on the crossbeam, and each adjusting component is equipped with a connecting component. Longitudinal beams are provided on both connecting components. The connecting components are used to achieve quick-release connection between the longitudinal beams and the adjusting components. The adjusting components are used to adjust the distance between the two connecting components to adjust the distance between the two longitudinal beams. A detection component is also provided on the connecting components to detect the hoisting load on the longitudinal beams. Multiple hoisting components for hoisting the steel space frame are spaced apart at the bottom of the longitudinal beams.

[0006] Furthermore, the adjustment assembly includes an I-beam, a screw, a dual-axis motor, and a mounting frame. The I-beams are symmetrically slidably arranged inside the crossbeam. The two I-beams are threadedly connected to the screw on the side that is close to each other. The dual-axis motor is installed in the middle of the crossbeam. The two output shafts of the dual-axis motor are fixedly connected to the ends of the adjacent screws, respectively. The two I-beams are fixedly connected to the ends that are far apart from each other.

[0007] Furthermore, the connecting assembly includes a sliding seat, a vertical plate, a horizontal plate, a U-shaped limiting plate, and a return spring a. Sliding seats are slidably arranged on both mounting frames, and vertical plates are symmetrically arranged on both sliding seats. A horizontal plate is fixedly connected between the top of two adjacent vertical plates. Two longitudinal beams are fixedly connected between the bottom of two adjacent vertical plates. U-shaped limiting plates are slidably arranged on the top panels of both mounting frames, and two return springs a are spaced apart between the two U-shaped limiting plates and the adjacent mounting frames.

[0008] Furthermore, the detection assembly includes a pressure sensor, a hydraulic cylinder, a top plate, and a control module. Pressure sensors are embedded in the middle of the bottom of both horizontal plates. Hydraulic cylinders are symmetrically installed on both sliding seats. A top plate is fixedly connected between the piston rod ends of two adjacent hydraulic cylinders. The top plate is in contact with the adjacent pressure sensor. A control module is installed in the middle of the top of the crossbeam.

[0009] Furthermore, the hoisting assembly includes a mounting base, a trapezoidal limit block, a pull plate, a return spring b, a clamping plate, a steel cable, and a hook. Multiple mounting bases are spaced apart at the bottom of both longitudinal beams. Trapezoidal limit blocks are slidably mounted on the front and rear panels of the mounting bases. Pull plates are fixedly connected to the sides of two adjacent trapezoidal limit blocks that are far apart from each other. Two return springs b are connected between the pull plates and the mounting bases. Clamping plates are slidably mounted in the mounting bases. Steel cables are fixedly connected to the bottom of the clamping plates. Hooks are fixedly connected to the lower ends of the steel cables.

[0010] Furthermore, it also includes extension beams, connecting plates, and strong bolts. Extension beams are provided on both the front and rear sides of the two longitudinal beams. Connecting plates are symmetrically fixed to the side of the extension beams closest to the adjacent longitudinal beams. Four strong bolts are spaced apart between two adjacent connecting plates, and the connecting plates and longitudinal beams are fixedly connected by the strong bolts.

[0011] Furthermore, it also includes short shafts, U-shaped limiting rods, and torsion springs. Each hook is symmetrically fixed with short shafts at the front and back. U-shaped limiting rods are rotatably connected between two adjacent short shafts, and torsion springs are connected between the U-shaped limiting rods and adjacent short shafts.

[0012] Furthermore, it also includes U-shaped mounting plates and wheels. Two U-shaped mounting plates are fixedly connected to the bottom of each of the two longitudinal beams at intervals, and wheels are fixedly connected to the bottom of each of the two U-shaped mounting plates symmetrically.

[0013] Furthermore, it also includes fixed plates, height-increasing frames, U-shaped inserts, and magnetic blocks. Two fixed plates are symmetrically fixed to the outer walls on both the front and rear sides of the crossbeam. The four adjacent fixed plates are all slidably equipped with height-increasing frames. U-shaped inserts are slidably inserted into the two height-increasing frames. The U-shaped inserts can also penetrate the adjacent fixed plates. Two magnetic blocks are fixedly connected to the U-shaped inserts.

[0014] Furthermore, the traveling wheel (92) is a universal wheel.

[0015] The beneficial effects are as follows: This invention uses multi-point hoisting to ensure that the steel space frame is subjected to uniform force and reduce deformation. It uses pressure sensors to monitor the hoisting force of the longitudinal beams in real time and adjusts the position of the longitudinal beams through the control module to quickly adjust the steel space frame to a horizontal state. There is no need to calculate the center of gravity of the steel space frame before hoisting; only simple visual inspection is required, which greatly saves time and manpower, improves installation efficiency and convenience, and the longitudinal beams can be disassembled for easy transportation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a three-dimensional structural diagram of the screw, dual-axis motor, and mounting frame of the present invention.

[0018] Figure 3 This is a three-dimensional structural diagram of the sliding seat, vertical plate, and horizontal plate of the present invention.

[0019] Figure 4 This is a three-dimensional structural diagram of the U-shaped limiting plate, pressure sensor, and hydraulic cylinder of the present invention.

[0020] Figure 5 This is a three-dimensional structural diagram of the mounting base, trapezoidal limiting block, and pull plate of the present invention.

[0021] Figure 6 This is a three-dimensional structural diagram of the extension beam, connecting plate, and strong bolts of the present invention.

[0022] Figure 7 This is a three-dimensional structural diagram of the short shaft, U-shaped limiting rod, and torsion spring of the present invention.

[0023] Figure 8 This is a three-dimensional structural diagram of the fixing plate, the height-increasing frame, and the U-shaped insert rod of the present invention.

[0024] Reference numerals: 1_crossbeam, 2_connecting seat, 21_steel cable, 22_lifting ring, 31_I-beam, 32_screw rod, 33_dual-axis motor, 34_mounting frame, 41_sliding seat, 42_vertical plate, 43_horizontal plate, 44_longitudinal beam, 45_U-shaped limit plate, 46_reset spring a, 51_pressure sensor, 52_hydraulic cylinder, 53_top plate, 54_control module, 61_mounting seat 62_Trapezoidal limit block, 63_Pull plate, 631_Reset spring b, 64_Card plate, 65_Steel cable, 66_Hook, 71_Extension beam, 72_Connecting plate, 73_Strong bolt, 81_Short shaft, 82_U-shaped limit rod, 83_Torsion spring, 91_U-shaped mounting plate, 92_Walking wheel, 101_Fixing plate, 102_Elevator frame, 103_U-shaped insert rod, 104_Magnetic block. Detailed Implementation

[0025] The technical solution of the present invention will be further described below with reference to the accompanying drawings.

[0026] Example: A steel space frame hoisting device with good stability, such as... Figures 1-8 As shown, the assembly includes a crossbeam 1, connecting seats 2, steel cables 21, lifting rings 22, adjusting components, connecting components, longitudinal beams 44, detection components, and lifting components. Connecting seats 2 are symmetrically welded and fixed to the top of the crossbeam 1. Steel cables 21 are connected to both connecting seats 2, and lifting rings 22 are fixedly connected between the upper ends of the two steel cables 21. Adjusting components are symmetrically arranged on the crossbeam 1, and each adjusting component has a connecting component. Each connecting component has a longitudinal beam 44. The connecting components enable quick-release fixed connections between the longitudinal beams 44 and the adjusting components. The adjusting components adjust the distance between the two connecting components to adjust the distance between the two longitudinal beams 44. The connecting components also have detection components for detecting the lifting load of the longitudinal beams 44. Multiple lifting components for lifting the steel space frame modules are spaced apart at the bottom of the longitudinal beams 44.

[0027] like Figure 1 and Figure 2 As shown, the adjustment assembly includes an I-beam 31, a screw 32, a dual-axis motor 33, and a mounting frame 34. The I-beams 31 are symmetrically and slidably arranged inside the crossbeam 1. The screw 32 is embedded and threadedly connected to the side of the two I-beams 31 that is close to each other. The dual-axis motor 33 is installed in the middle of the crossbeam 1. The two output shaft ends of the dual-axis motor 33 are fixedly connected to the ends of the adjacent screws 32, respectively. The mounting frame 34 is welded and fixed to the ends of the two I-beams 31 that are far apart from each other.

[0028] like Figure 3 and Figure 4As shown, the connecting assembly includes a sliding seat 41, a vertical plate 42, a horizontal plate 43, a U-shaped limiting plate 45, and a return spring a46. Sliding seats 41 are slidably arranged on both mounting frames 34. Vertical plates 42 are symmetrically arranged on both sliding seats 41. A horizontal plate 43 is welded and fixed between the tops of two adjacent vertical plates 42. Two longitudinal beams 44 are fixedly connected between the bottoms of two adjacent vertical plates 42. U-shaped limiting plates 45 for limiting and fixing the sliding seats 41 are slidably arranged on the top panels of both mounting frames 34. Two return springs a46 are spaced apart between the two U-shaped limiting plates 45 and the adjacent mounting frames 34.

[0029] like Figure 1 , Figure 3 and Figure 4 As shown, the detection assembly includes a pressure sensor 51, a hydraulic cylinder 52, a top plate 53, and a control module 54. Pressure sensors 51 are embedded in the bottom center of both horizontal plates 43. Hydraulic cylinders 52 are symmetrically mounted on both sliding seats 41. A top plate 53 is fixedly connected between the piston rod ends of adjacent hydraulic cylinders 52, and the top plate 53 contacts the adjacent pressure sensor 51. The control module 54 is installed in the top center of the crossbeam 1. The hydraulic cylinders 52 and pressure sensors 51 are electrically connected to the control module 54.

[0030] like Figure 5 and Figure 6 As shown, the hoisting assembly includes a mounting base 61, a trapezoidal limiting block 62, a pull plate 63, a return spring b631, a clamping plate 64, a steel cable 65, and a hook 66. Six mounting bases 61 are spaced apart at the bottom of each of the two longitudinal beams 44. Trapezoidal limiting blocks 62 are slidably mounted on the front and rear panels of each mounting base 61. The sides of the trapezoidal limiting blocks 62 that are close to each other are cut with bevels. Pull plates 63 are welded and fixed to the sides of adjacent trapezoidal limiting blocks 62 that are far apart. Two return springs b63 are connected to the mounting base 61 on both the left and right sides of the pull plate 63. Spring b631 and mounting base 61 are both slidably provided with a locking plate 64. The bottom of the locking plate 64 is fixedly connected with a steel cable 65. The lower end of the steel cable 65 is fixedly connected with a hook 66. The locking plate 64 is symmetrically provided with a slot that cooperates with the trapezoidal limiting block 62. The trapezoidal limiting block 62 can be inserted into the slot, thereby limiting and fixing the locking plate 64 in the mounting base 61. When the locking plate 64 is inserted into the mounting base 61, it first contacts the inclined surface cut on the trapezoidal limiting block 62, thereby pushing the two adjacent trapezoidal limiting blocks 62 to move away from each other.

[0031] During transportation, workers press down the two U-shaped limiting plates 45 to remove the two sliding seats 41 from the mounting frame 34, thus separating the longitudinal beam 44 from the transverse beam 1, reducing transportation space occupation and improving transportation convenience. Upon arrival at the hoisting site, the sliding seats 41 are slidably placed on the mounting frame 34, and the U-shaped limiting plates 45 are used to limit their movement. In use, workers connect the crane hook 66 to the lifting ring 22, then lift the transverse beam 1 and longitudinal beam 44, visually moving the two longitudinal beams 44 to the center of the top of the steel grid frame. Next, workers take multiple hooks 66 and place them at the bottom of the longitudinal beams 44 according to the grid distribution of the steel grid frame, achieving multi-point hoisting of the steel grid frame, ensuring even stress distribution and reducing deformation. When setting the hooks 66, workers insert the clamping plates 64 into the mounting seats 61. During the insertion of the clamping plate 64, it first contacts and presses against the inclined surfaces of the two trapezoidal limiting blocks 62, pushing the two trapezoidal limiting blocks 62 away from each other. At this time, the return spring b631 is stretched. When the slots on the clamping plate 64 are aligned with the trapezoidal limiting blocks 62, under the reset action of the return spring b631, the two trapezoidal limiting blocks 62 are inserted into the slots of the clamping plate 64, realizing the fixed connection between the clamping plate 64 and the mounting base 61, making the installation of the hook 66 convenient. After the hook 66 is installed, the operator operates the crane to lift the entire lifting device upward. Since the position of the longitudinal beam 44 is adjusted by visual inspection, and the position of the hook 66 connected to the steel grid frame cannot make the steel cable 65 completely vertical, the inclination heights of the steel cables 65 on both sides are different. During the lifting, the center of gravity of the steel grid frame may shift, causing one longitudinal beam 44 to be subjected to greater force. At this time, the two pressure sensors 51 can detect the lifting force of the two longitudinal beams 44 respectively. When the left-side pressure sensor 51 detects a large force on the left longitudinal beam 44, it indicates that the center of gravity of the steel space frame has shifted to the left, resulting in a left-low, right-high position. At this time, the control module 54 controls the piston rods of the two left-side hydraulic cylinders 52 to extend, which, through the top plate 53, horizontal plate 43, and vertical plate 42, moves the left longitudinal beam 44 upward until the pressure detected by the two pressure sensors 51 is the same. At this point, the steel space frame is adjusted to a horizontal position. This eliminates the need for precise calculations before hoisting; only a simple visual inspection by the staff is required, saving time and effort.

[0032] like Figure 6 As shown, it also includes an extension beam 71, a connecting plate 72, and heavy bolts 73. Extension beams 71 are provided on both the front and rear sides of the two longitudinal beams 44. Connecting plates 72 are symmetrically welded and fixed on the side of the extension beam 71 closest to the adjacent longitudinal beam 44. Four heavy bolts 73 are spaced apart between two adjacent connecting plates 72, and the connection between the connecting plates 72 and the longitudinal beams 44 is fixedly connected by the heavy bolts 73. Three hoisting components are also spaced apart at the bottom of the extension beam 71.

[0033] Before hoisting, workers can use strong bolts 73 to install extension beams 71 on both the front and rear sides of the longitudinal beam 44 to extend the length of the longitudinal beam 44. The extension beams 71 can be removed during transportation for easy transport.

[0034] like Figure 7 As shown, it also includes a short shaft 81, a U-shaped limiting rod 82 and a torsion spring 83. Each hook 66 is symmetrically welded and fixed with a short shaft 81. A U-shaped limiting rod 82 is rotatably connected between two adjacent short shafts 81. A torsion spring 83 is connected between the U-shaped limiting rod 82 and the adjacent short shaft 81.

[0035] When connecting the hook 66 to the steel space frame, the worker first opens the U-shaped limiting rod 82 and clamps the hook 66 onto the steel pipe of the steel space frame. After releasing the U-shaped limiting rod 82, the U-shaped limiting rod 82 returns to its original position under the reset action of the torsion spring 83, thus sealing the opening of the hook 66 and preventing the hook 66 from coming loose.

[0036] like Figure 6 As shown, it also includes U-shaped mounting plates 91 and traveling wheels 92. The bottom of each of the two longitudinal beams 44 is welded with two U-shaped mounting plates 91 at intervals. The bottom of each of the two U-shaped mounting plates 91 is symmetrically fixed with traveling wheels 92 by bolts.

[0037] By setting up a U-shaped mounting plate 91 and traveling wheels 92, the longitudinal beam 44 can be transported easily.

[0038] like Figure 8 As shown, it also includes a fixing plate 101, a riser frame 102, a U-shaped insert rod 103, and a magnetic block 104. Two fixing plates 101 are symmetrically welded and fixed on the outer walls of both the front and rear sides of the crossbeam 1. The riser frame 102 is slidably mounted on all four adjacent fixing plates 101. A U-shaped insert rod 103 is slidably inserted into each of the two riser frames 102. The U-shaped insert rod 103 can also pass through the adjacent fixing plates 101. The lower part of each of the two riser frames 102 has an opening for the U-shaped insert rod to pass through. Initially, the U-shaped insert rod fixes the riser 102 to the fixing plate 101 through the insert hole, thus folding up the riser 102 and reducing the space occupied by the riser 102 and the crossbeam 1 in the vertical direction, which facilitates the transportation of the crossbeam 1. Two magnetic blocks 104 are fixedly connected to the U-shaped insert rod 103. The U-shaped insert rod 103 is magnetically fixed to the adjacent fixing plate 101 through the magnetic blocks 104, thereby preventing the U-shaped insert rod 103 from loosening during transportation.

[0039] When installing the sliding seat 41, the worker first pulls out the U-shaped plug 103, moves the riser 102 to the underside of the fixing plate 101, and then reinserts the U-shaped plug 103 into the plug hole on the underside of the riser 102 to fix the riser 102 to the underside of the fixing plate 101, thereby raising the crossbeam 1 and positioning the mounting frame 34 at the height to be assembled with the sliding seat 41, making it easier for the worker to install the sliding seat 41.

[0040] The 92 traveling wheels are omnidirectional wheels, which facilitates the adjustment of the moving angle of the longitudinal beam 44 by the staff during transportation.

[0041] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art that various changes or modifications can be made to the invention without departing from the principles and spirit of the invention as defined by the claims. Therefore, the detailed description of the embodiments in this disclosure is for illustrative purposes only and is not intended to limit the invention; rather, the scope of protection is defined by the content of the claims.

Claims

1. A steel space frame hoisting device with good stability, characterized in that, Including: A crossbeam (1) is symmetrically connected to a connecting seat (2) at the top of the crossbeam (1). A steel cable (21) is connected to each of the two connecting seats (2). A lifting ring (22) is fixedly connected between the upper ends of the two steel cables (21). An adjustment component is symmetrically arranged on the crossbeam (1). A connecting component is provided on each of the adjustment components. A longitudinal beam (44) is provided on each of the two connecting components. The connecting component is used to realize the quick-release connection between the longitudinal beam (44) and the adjustment component. The adjustment component is used to adjust the distance between the two connecting components to adjust the distance between the two longitudinal beams (44). A detection component is also provided on the connecting component to detect the lifting load of the longitudinal beam (44). Multiple lifting components for lifting the steel grid frame are arranged at intervals at the bottom of the longitudinal beam (44). The adjustment assembly includes: an I-beam (31), in which the I-beam (31) is symmetrically and slidably arranged inside the crossbeam (1), and a screw (32) is embedded and threadedly connected to the side of the two I-beams (31) that are close to each other, and a mounting frame (34) is fixedly connected to the ends of the two I-beams (31) that are far apart from each other; and a dual-axis motor (33), in which the dual-axis motor (33) is installed in the middle inside the crossbeam (1), and the ends of the two output shafts of the dual-axis motor (33) are fixedly connected to the ends of the adjacent screws (32); The connecting components include: a sliding seat (41), on which the sliding seat (41) is slidably disposed on both of the two mounting frames (34), and vertical plates (42) are symmetrically slidably disposed on both of the two sliding seats (41), and a horizontal plate (43) is fixedly connected between the top of each of the two adjacent vertical plates (42), and two longitudinal beams (44) are respectively fixedly connected between the bottom of the two adjacent vertical plates (42); and a U-shaped limiting plate (45), on which the U-shaped limiting plate (45) is slidably disposed on the top panel of each of the two mounting frames (34), and two return springs a (46) are spaced apart between each of the two U-shaped limiting plates (45) and the adjacent mounting frames (34). The detection components include: a pressure sensor (51), which is embedded in the middle of the bottom of each of the two horizontal plates (43); a hydraulic cylinder (52), which is symmetrically mounted on each of the two sliding seats (41), and a top plate (53) is fixedly connected between the piston rod ends of each of the two adjacent hydraulic cylinders (52), and the top plate (53) is in contact with the adjacent pressure sensor (51); and a control module (54), which is mounted in the middle of the top of the crossbeam (1). The hoisting assembly includes: a mounting base (61), with multiple mounting bases (61) spaced apart at the bottom of the two longitudinal beams (44), trapezoidal limit blocks (62) slidably mounted on the front and rear panels of the mounting base (61), pull plates (63) fixedly connected to the sides of two adjacent trapezoidal limit blocks (62) that are far apart from each other, two return springs b (631) connected between the pull plates (63) and the mounting base (61), a locking plate (64) slidably mounted in the mounting base (61), a steel cable (65) fixedly connected to the bottom of the locking plate (64), and a hook (66) fixedly connected to the lower end of the steel cable (65).

2. The steel space frame hoisting device with good stability according to claim 1, characterized in that, Also includes: Extension beams (71) are provided on both the front and rear sides of the two longitudinal beams (44). Each extension beam (71) is symmetrically fixed with a connecting plate (72) on the side of the adjacent longitudinal beam (44). Four strong bolts (73) are provided at intervals between two adjacent connecting plates (72), and the connecting plate (72) is fixedly connected to the longitudinal beam (44) through the strong bolts (73).

3. The steel space frame hoisting device with good stability according to claim 2, characterized in that, Also includes: Each hook (66) is symmetrically and fixedly connected to a short shaft (81). A U-shaped limiting rod (82) is rotatably connected between two adjacent short shafts (81). A torsion spring (83) is connected between the U-shaped limiting rod (82) and the adjacent short shaft (81).

4. The steel space frame hoisting device with good stability according to claim 3, characterized in that, Also includes: The bottom of the two longitudinal beams (44) is fixedly connected to the U-shaped mounting plate (91) at intervals. The bottom of the two U-shaped mounting plates (91) is fixedly connected to the walking wheels (92) symmetrically on the left and right.

5. The steel space frame hoisting device with good stability according to claim 4, characterized in that, Also includes: The fixing plate (101) is symmetrically fixed to the outer walls of the front and rear sides of the crossbeam (1). The four adjacent fixing plates (101) are slidably provided with a height-increasing frame (102). A U-shaped rod (103) is slidably inserted on each of the two height-increasing frames (102). The U-shaped rod (103) can also penetrate the adjacent fixing plate (101). Two magnetic blocks (104) are fixedly connected to the U-shaped rod (103).

6. The steel space frame hoisting device with good stability according to claim 5, characterized in that: The traveling wheel (92) is a swivel wheel.

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