A supporting device for a pallet trolley

Abstract

The utility model provides a kind of supporting device for trolley, belong to hoisting auxiliary equipment technical field, technical scheme is, a kind of supporting device for trolley, including supporting frame, at least two groups of hanging components are equipped on supporting frame, each group of hanging components includes hanging bracket and pressure holding piece, hanging bracket can be sleeved on track beam, and can slide along the length direction of track beam, the bottom of hanging bracket is rotatably connected with supporting frame, pressure holding piece includes the plunger and pressure rod that are perpendicular to each other, the top of plunger is rotatably connected with hanging bracket.The utility model has the beneficial effect that, the device can be supported by supporting frame to hold trolley, and can be locked lifting height by the self-locking effect of pressure holding piece, effectively avoid trolley to fall, so as to realize the stable and reliable support to trolley.

Description

Technical Field

[0001] This utility model belongs to the technical field of lifting auxiliary equipment, specifically relating to a support device for a lifting trolley. Background Technology

[0002] As a core auxiliary component of mobile lifting equipment such as tire cranes and tower cranes, the trolley mainly bears the load and guides the mobile cable. Its wheels roll on the I-beam rails for a long time and are prone to wear and tear, requiring periodic replacement. During maintenance work to replace the wheels, the suspended trolley must first be stably raised to completely remove the wheels from the rails to eliminate the load pressure before the replacement operation can be carried out.

[0003] As shown in the patent with publication number CN223268285U, the device includes a support frame, a cylinder-driven liftable telescopic rod, and a U-shaped support space. The telescopic rod is vertically mounted below the support frame, and the piston rod is driven by the cylinder to extend and retract to drive the support frame to rise and fall synchronously. The U-shaped support space is opened on one side of the support frame to support the structure to be lifted, and at the same time, the height of the support frame is maintained by the cylinder driving force, thereby realizing the lifting and lowering of the structure to be lifted.

[0004] However, the existing structure is only suitable for low-altitude operations and cannot be adapted to the high-altitude replacement scenario of the trolley. On the one hand, its cylinder drive relies on a stable compressed air source, but there is no fixed air passage in high-altitude operation sites such as the main beam of the lifting equipment, making it difficult to meet the air supply requirements. On the other hand, the low temperature and vibration environment at high altitudes can easily cause the cylinder seals to age and the piston rod to stick, directly causing lifting failure and ultimately failing to meet the support requirements of the trolley for high-altitude wheel replacement. Utility Model Content

[0005] This invention addresses the problems of insufficient stability and poor reliability in existing structures that rely on cylinders to support the trolley, which can easily lead to the trolley falling. It provides a support device for the trolley that can provide stable and reliable support for the trolley, effectively ensuring that the trolley will not fall.

[0006] To solve the above problems, the technical solution adopted by this utility model is a supporting device for a trolley, including a supporting frame, at least two sets of hanging components on the supporting frame, each set of hanging components including a hanging frame and a pressing member, the hanging frame can be fitted onto the track beam and can slide along the length direction of the track beam, the bottom of the hanging frame is rotatably connected to the supporting frame, and the pressing member includes a pressing head and a pressing rod that are perpendicular to each other, the pressing head is rotatably connected to the top of the hanging frame.

[0007] In this technical solution, the support device for the trolley provides stable support for the trolley through the coordinated operation of the support frame and the mounting components. Specifically, the support frame is equipped with at least two sets of mounting components. Each set of mounting components includes a mounting bracket and a holding member. The mounting bracket can be fitted onto the track beam and slide along its length, with its bottom rotatably connected to the support frame. The holding member consists of mutually perpendicular pressing heads and pressing rods. The pressing heads are rotatably connected to the top of the mounting bracket, forming a linkage lever structure. During operation, the mounting bracket is first fitted onto the track beam and connected to the support frame, so that the support frame supports the trolley whose wheels need to be replaced. Then, the pressing rod is rotated, causing the pressing head to rotate around the connection point at the top of the mounting bracket on the track beam. At this time, the contact point between the pressing head and the track beam acts as a fulcrum, and through the lever action, it pushes the mounting bracket and the support frame together to rise until the trolley's wheels are completely detached from the track beam. In this state, the weight of the trolley is transmitted to the coupling frame through the support frame, which in turn causes the pressure head to exert downward pressure on the track beam. The reaction force of the track beam is transmitted to the pressure rod along the convex surface of the pressure head, forming a stable force balance. This force causes the pressure rod to maintain its current angle and prevent it from rotating in the opposite direction, thus achieving self-locking of the pressure holding component. Therefore, this device can not only stably support the trolley through the support frame, but also lock the lifting height through the self-locking effect of the pressure holding component, effectively preventing the trolley from falling, thereby achieving stable and reliable support for the trolley.

[0008] Furthermore, there are two sets of mounting components, distributed on both sides of the support frame. During high-altitude operations, wind force and contact by maintenance personnel can easily generate lateral forces on the support frame. The mounting components on both sides cooperate with the two sides of the track beam, which is equivalent to forming a two-way horizontal constraint on the support frame. This not only prevents the support frame from tilting or overturning to one side, but also reduces the overall swaying amplitude and prevents the trolley from slipping out of the support frame due to swaying, thus meeting the safety requirements for preventing falls and deviations during high-altitude operations.

[0009] Furthermore, the mounting bracket includes two connecting plates, the distance between which is greater than the width of the track beam. Each connecting plate has connecting holes at its upper and lower parts. A support shaft passes through the connecting holes at the upper part of the two connecting plates, and the support shaft is rotatably connected to the pressure head. A connecting shaft also passes through the connecting holes at the lower part of the two connecting plates, and the connecting shaft is detachably connected to the support frame. The distance between the two connecting plates is greater than the width of the track beam, which allows the mounting bracket to be smoothly fitted onto the outside of the track beam, avoiding jamming due to excessive tightness. The double-sided wrapping structure also provides constraint from both sides of the track beam. This constraint prevents the mounting bracket from shifting or falling off along the width of the track beam. Especially under high-altitude winds or lateral forces generated by operational contact, the double-sided connecting plates limit unilateral swaying of the mounting bracket, laying a stable foundation for subsequent support of the trolley. After the support shaft passes through the connecting holes at the upper part of the two connecting plates, the support shaft is rotatably connected to the pressure head, effectively providing a double-sided fulcrum for the pressure head. Compared to a single-sided fulcrum, double-sided connecting plates can restrict the lateral movement of the support shaft, making the pressure head rotate more smoothly around the support shaft. This avoids the pressure head shifting due to unilateral force, preventing it from accurately contacting the track beam, and thus ensuring that the lever effect and self-locking effect are reliably effective.

[0010] Furthermore, both connecting holes of the connecting piece are oblong holes, with the length direction of the oblong holes being the same as the length direction of the connecting piece. This allows for flexible adaptation to installation errors and reduces the difficulty of high-altitude assembly. Whether there are slight deviations in the height of the track beam or dimensional errors arising during the processing of the hanger and support frame, the adjustment margin reserved in the length direction of the oblong holes allows for flexible fine-tuning of the position of the support shaft and connecting shaft inserted within. For example, the shaft can be smoothly inserted without precise alignment of the holes during installation, avoiding repeated adjustments of the hole positions during high-altitude operations due to dimensional constraints, significantly improving assembly efficiency, and reducing component deformation or damage caused by forced alignment.

[0011] Furthermore, the surface of the pressure head opposite the pressure rod is a smooth convex surface. This reduces rotational resistance and improves ease of operation. When operators rotate the pressure rod during high-altitude operations, they need to minimize effort. The smooth convex surface reduces frictional resistance between the pressure head and the track beam. Especially when the pressure head rotates with the pressure rod and experiences slight relative sliding with the track beam, the smooth surface prevents jamming, allowing for smoother rotation of the pressure rod, reducing operator fatigue, and adapting to the needs of high-altitude operations where space is limited and operation is inconvenient.

[0012] Furthermore, a limiting plate is fixed to the end of the pressure rod away from the pressure head. There are two limiting plates, symmetrically distributed on both sides of the pressure rod, and the two limiting plates can be precisely engaged with both sides of the track beam. First, it can lock the lateral position of the pressure rod, preventing the self-locking force balance from being broken. In the self-locking state, the pressure rod needs to be tightly against the track beam to maintain stable force. If the pressure rod shifts laterally, the contact point between the pressure head and the track beam will shift accordingly, and the original force balance will be disrupted, leading to self-locking failure. The two limiting plates are precisely engaged with both sides of the track beam, which can restrict the movement space of the pressure rod laterally, keeping the pressure rod always tightly against the preset contact position of the track beam, ensuring that the force transmission path between the pressure head and the track beam does not deviate, maintaining the stable force couple balance required for self-locking, and fundamentally avoiding self-locking failure caused by pressure rod displacement.

[0013] Furthermore, a handle is fixed to the end of the pressure rod away from the pressure head, located on the side of the pressure rod away from the limiting plate. Firstly, the handle provides a clear gripping point for pulling the pressure rod. When releasing the self-locking mechanism, the self-locking force of the pressure rod needs to be overcome, pulling the rod to rotate it away from its tight contact with the track beam. The handle allows the operator to easily apply force, avoiding slippage caused by a smooth surface or concentrated force when directly gripping the pressure rod, ensuring stable force application and efficient rotation of the pressure rod. Secondly, the handle's location away from the limiting plate avoids the engagement area between the limiting plate and the track beam. When the limiting plate is engaged with both sides of the track beam, the surrounding space is easily occupied by the track beam or the limiting plate itself. The handle's location away from the limiting plate provides ample space for hand operation, preventing collisions or interference between the hand and the limiting plate or track beam during gripping or pulling, making the pulling action smoother. This layout reduces operational obstacles and improves safety, especially in high-altitude work environments with limited space.

[0014] Furthermore, the handle is covered with a rubber sleeve. This enhances grip friction and prevents slippage during operation. The rubber sleeve has a certain degree of roughness and the material itself has slight elasticity, allowing it to maintain a stable fit against the hand even when hands are sweaty or oily, preventing slippage when pulling the handle. Especially in high-altitude operations, when hand pressure is unstable or there is sudden shaking, the anti-slip effect ensures that the operator's control of the lever remains uninterrupted, guaranteeing accurate completion of the self-locking action and reducing the risk of operational errors due to slippage.

[0015] Furthermore, the support frame is a rectangular frame with a hollow interior and an open top. This facilitates the placement and positioning of the trolley, adapting to wheel-changing operations. The open top design allows the trolley with the wheels to be replaced to be placed directly into the support frame from above, eliminating the need for side or bottom maneuvers. This significantly reduces the difficulty of docking the trolley with the support frame, especially in high-altitude operations with limited space. The regular rectangular shape precisely matches the standard rectangular structure at the bottom of the trolley, allowing it to naturally conform to the frame's sidewalls after placement, preventing lateral shifts and ensuring the trolley remains stable during support. This provides a reliable reference point for the subsequent wheel detachment from the track beam.

[0016] Furthermore, connecting plates are fixed to the side walls on both sides of the support frame, and a sleeve is fixed to the top of each connecting plate. The sleeve is fitted onto the outside of the connecting shaft of the corresponding hanger. Compared with directly fitting the connecting shaft through the opening of the connecting plate, the annular structure of the sleeve has a larger contact area with the connecting shaft, which can form a tighter wrapping fit. This not only prevents the support frame from loosening relative to the hanger when bearing weight, but also ensures that the support frame can synchronously adjust its angle when the hanger rotates around the connecting shaft. This ensures that the support frame always maintains a stable connection with the hanger when the holding member lifts the hanger, without any offset or jamming.

[0017] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: 1. The support is stable and reliable. It can stably support the trolley and prevent it from falling by levering the holding parts and using the self-locking structure, combined with the lateral constraint of the limit plate. The double-sided hook frame can also prevent the support frame from tipping over and swaying. 2. Easy and labor-saving operation, easy to attach the mounting bracket to the track beam, the waist-shaped hole is suitable for installation errors, the handle and rubber sleeve are easy to release and self-locking and non-slip, and the high efficiency of high-altitude operations; 3. The structure is durable and highly adaptable. The convex curved surface of the pressure head reduces wear. The sleeve connection strengthens the linkage between the support frame and the hanging frame. The hollow open support frame makes it easy to put and take out the trolley, which is suitable for the wheel changing needs of the trolley. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model; Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle.

[0020] In the diagram: 1. Support frame; 11. Connecting plate; 12. Sleeve; 2. Hanging assembly; 21. Hanging bracket; 211. Connecting piece; 212. Connecting hole; 213. Support shaft; 214. Connecting shaft; 22. Pressing component; 221. Press head; 222. Press rod; 223. Convex curved surface; 224. Limiting plate; 225. Handle; 226. Rubber sleeve; 3. Track beam. Detailed Implementation

[0021] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0022] A support device for a trolley, such as Figure 1 As shown, the device includes a support frame 1, which can support the trolley whose wheels need to be replaced. The support frame 1 is provided with at least two sets of hooking components 2. Each set of hooking components 2 includes a hooking frame 21 and a pressing member 22. The hooking frame 21 can be fitted onto the track beam 3 and can slide along the length of the track beam 3. The bottom of the hooking frame 21 is rotatably connected to the support frame 1, which can hook the support frame 1 onto the track beam 3. The pressing member 22 presses up the support frame 1 and performs self-locking.

[0023] In this specific embodiment, the support frame 1 is designed as a rectangular frame with a hollow interior and an open top. The internal dimensions of the frame are adapted to the bottom contour of the trolley whose wheels are to be replaced, ensuring that the trolley can stably fit against the side wall of the frame after being placed in, avoiding lateral displacement. To achieve connection with the hanging assembly 2, connecting plates 11 are fixedly connected to the side walls on both sides of the support frame 1. The fixing method can be welding or bolt connection to ensure the connection strength between the connecting plates 11 and the support frame 1. A sleeve 12 is also fixed to the top of each connecting plate 11. The sleeve 12 is preferably fixed to the connecting plate 11 by welding to ensure that the two are coaxial. The sleeve 12 is the key structure for establishing a rotational connection between the support frame 1 and the hanging frame 21, providing a foundation for the subsequent lifting of the support frame 1 by the hanging frame 21.

[0024] like Figure 2As shown, there are two sets of hook-up components 2 that cooperate with the support frame 1. The two sets of hook-up components 2 are symmetrically distributed on both sides of the support frame 1 to ensure that the support frame 1 is subjected to balanced force. The hook-up frame 21 in each set of hook-up components 2 is the core structure for realizing the fitting of the device with the track beam 3 and connecting the support frame 1. It includes two parallel connecting pieces 211. The distance between the two connecting pieces 211 is greater than the width of the track beam 3, which ensures that the hook-up frame 21 can be smoothly fitted onto the outside of the track beam 3 and avoids sliding jamming due to the small gap after fitting. Each connecting piece 211 has a connecting hole 212 on the upper and lower parts, and both connecting holes 212 are oblong holes. The length direction of the oblong hole is the same as the length direction of the connecting piece 211. This design can accommodate the height deviation of the track beam 3 and the dimensional errors generated during the component processing, providing adjustment margin for subsequent shaft installation and reducing assembly difficulty.

[0025] To connect the mounting bracket 21 to the pressure member 22 and the support frame 1 respectively, two shafts are installed on the two connecting plates 211 of the mounting bracket 21: one is a support shaft 213, which passes between the connecting holes 212 on the upper part of the two connecting plates 211. The outer circumferential surfaces of both ends of the support shaft 213 are provided with external threads. After the two ends of the support shaft 213 pass through the corresponding connecting holes 212 on the upper part of the two connecting plates 211 respectively, a nut is fitted on each end and tightened. Through the cooperation of the nuts and the external threads of the support shaft 213, the support shaft 213 is firmly fixed to the two connecting plates 211. Between the two connecting pieces 211, the support shaft 213 is restricted from moving along its own axial direction. The support shaft 213 is used to connect with the pressure member 22. The second is a connecting shaft 214, which passes through the connecting holes 212 at the bottom of the two connecting pieces 211. The outer circumferential surfaces of both ends of the connecting shaft 214 are also provided with external threads. After the two ends of the connecting shaft 214 pass through the corresponding connecting holes 212 at the bottom of the two connecting pieces 211, a nut is fitted on each end and tightened to fix the connecting shaft 214 to the two connecting pieces 211. The connecting shaft 214 is used to connect with the support frame 1.

[0026] Based on the above structure, the support frame 1 and the hanging bracket 21 are rotatably connected through the connecting shaft 214 and the sleeve 12: the sleeve 12 on the top of the connecting plate 11 of the support frame 1 is sleeved on the outside of the connecting shaft 214 of the corresponding hanging bracket 21, and the sleeve 12 and the connecting shaft 214 are clearance fit, so that the support frame 1 can rotate flexibly around the axis of the connecting shaft 214; if the support frame 1 and the hanging bracket 21 need to be disassembled in the future, it is only necessary to unscrew the nuts at both ends of the connecting shaft 214, and the connecting shaft 214 can be taken out from the waist-shaped hole of the connecting plate 211 and the sleeve 12, so as to realize the detachable connection between the two, which is convenient for component maintenance or replacement.

[0027] The support shaft 213 on the upper part of the mounting bracket 21 is rotatably connected to the pressure member 22. The pressure member 22 is a key component for lifting and self-locking the support frame 1. It includes a pressure head 221 and a pressure rod 222 that are perpendicular to each other. The connection between the pressure head 221 and the pressure rod 222 can be integrally formed or welded to ensure that the two always remain perpendicular and the connection is stable. A light hole is opened at the corresponding position of the pressure head 221. The inner diameter of the light hole is adapted to the outer diameter of the support shaft 213. The support shaft 213 passes through the light hole of the pressure head 221, so that the pressure head 221 can rotate flexibly around the axis of the support shaft 213, thereby giving the pressure member 22 a lever adjustment function.

[0028] The surface of the pressure head 221 facing away from the pressure rod 222 is designed as a smooth convex curved surface 223. When the mounting bracket 21 is fitted onto the track beam 3, this convex curved surface 223 comes into close contact with the top surface of the track beam 3. This reduces the scratching and wear of the pressure head 221 on the surface of the track beam 3. Furthermore, during the rotation of the holding member 22, the convex curved surface 223 can quickly form a stable fulcrum with the track beam 3, ensuring smooth transmission of leverage force. The pressure rod 222 provides operation and self-locking auxiliary functions: a limit plate 224 is fixed to the end of the pressure rod 222 facing away from the pressure head 221. Welding is preferred as the fixing method. Two limit plates 224 are provided and symmetrically distributed on both sides of the pressure rod 222. The distance between the two limit plates 224 is adapted to the width of the track beam 3. When the device... When entering the self-locking state, the two limiting plates 224 can be precisely engaged on both sides of the track beam 3, restricting the pressure rod 222 from moving along the width direction of the track beam 3, and preventing the pressure rod 222 from shifting and causing the self-locking to fail. At the same time, a handle 225 is fixed to the end of the pressure rod 222 away from the pressure head 221. The handle 225 can be fixed to the pressure rod 222 by welding or threaded connection, and the handle 225 is located on the side of the pressure rod 222 away from the limiting plate 224, so as to avoid interference between the hand and the limiting plate 224 and the track beam 3 during operation. To improve grip comfort and anti-slip effect, a rubber sleeve 226 is tightly wrapped around the handle 225. The rubber sleeve 226 is fitted onto the outer periphery of the handle 225 by interference fit, so that even if the hand is sweaty or oily, it can ensure a stable grip.

[0029] Installation process: Place the trolley with the wheels to be replaced: Insert the trolley with the wheels to be replaced into the top opening of the support frame 1, so that the bottom of the trolley fits against the inner wall of the support frame 1.

[0030] Assemble the support frame 1 and the hanger 21: Place the sleeves 12 on the connecting plates 11 on both sides of the support frame 1 between the two connecting pieces 211 of the corresponding hanger 21, so that the inner hole of the sleeve 12 is aligned with the connecting hole 212 at the bottom of the two connecting pieces 211; then pass the connecting shaft 214 through the connecting hole 212 at the bottom of the connecting piece 211 and the inner hole of the sleeve 12, put nuts on both ends of the connecting shaft 214 and tighten them to complete the assembly of the support frame 1 and the hanger 21.

[0031] Assemble the hanger 21 and the clamping member 22: Place the clamping head 221 of the clamping member 22 between the two connecting pieces 211 of the hanger 21, so that the light hole of the clamping head 221 is aligned with the connecting hole 212 on the upper part of the two connecting pieces 211; then pass the support shaft 213 through the connecting hole 212 on the upper part of the connecting piece 211 and the light hole of the clamping head 221, put nuts on both ends of the support shaft 213 and tighten them to complete the assembly of the hanger 21 and the clamping member 22.

[0032] Work process: Lifting and self-locking: The operator holds the rubber sleeve 226 on the handle 225 and rotates the pressure rod 222 towards the track beam 3; the pressure rod 222 drives the pressure head 221 to rotate around the support shaft 213, and the convex curved surface 223 of the pressure head 221 is attached to the top of the track beam 3 to form a fulcrum, which pushes the hanging frame 21 together with the support frame 1 to lift upward through the leverage action; continue to rotate the pressure rod 222 until the traveling wheels of the trolley are completely separated from the track beam 3. At this time, the pressure rod 222 is close to the track beam 3, and the two limit plates 224 are just locked on both sides of the track beam 3. The device enters the self-locking state, and the trolley is stably stopped in the lifted position, and the traveling wheel replacement operation can be carried out.

[0033] Release and reset: After the traveling wheels are replaced, the operator turns the handle 225 in the opposite direction away from the track beam 3, causing the pressure rod 222 to disengage from the state of being tightly attached to the track beam 3. The locking relationship between the limit plate 224 and the track beam 3 is released, and the self-locking is disabled. The pressure rod 222 is slowly lowered, so that the support frame 1 gradually descends with the hanging frame 21 until the traveling wheels of the trolley re-contact the track beam 3. Finally, the trolley is taken out from the top opening of the support frame 1, and the device is pushed along the length of the track beam 3 to the end of the track beam 3 to remove it from the track beam 3, thus completing the entire operation process.

[0034] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: 1. The support is stable and reliable. It can stably support the trolley and prevent it from falling by levering the holding parts and using the self-locking structure, combined with the lateral constraint of the limit plate. The double-sided hook frame can also prevent the support frame from tipping over and swaying. 2. Easy and labor-saving operation, easy to attach the mounting bracket to the track beam, the waist-shaped hole is suitable for installation errors, the handle and rubber sleeve are easy to release and self-locking and non-slip, and the high efficiency of high-altitude operations; 3. The structure is durable and highly adaptable. The convex curved surface of the pressure head reduces wear. The sleeve connection strengthens the linkage between the support frame and the hanging frame. The hollow open support frame makes it easy to put and take out the trolley, which is suitable for the wheel changing needs of the trolley.

[0035] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A support device for a trolley, characterized in that, Includes a support frame (1), on which at least two sets of hanging components (2) are provided. Each set of hanging components (2) includes a hanging frame (21) and a pressing member (22). The hanging frame (21) can be fitted onto the track beam (3) and can slide along the length of the track beam (3). The bottom of the hanging frame (21) is rotatably connected to the support frame (1). The pressing member (22) includes a pressing head (221) and a pressing rod (222) that are perpendicular to each other. The pressing head (221) is rotatably connected to the top of the hanging frame (21).

2. The supporting device for the trolley according to claim 1, characterized in that, There are two sets of hanging components (2), which are distributed on both sides of the support frame (1).

3. The supporting device for the trolley according to claim 2, characterized in that, The mounting bracket (21) includes two connecting pieces (211). The distance between the two connecting pieces (211) is greater than the width of the track beam (3). Each connecting piece (211) has a connecting hole (212) at the top and bottom. A support shaft (213) passes through the connecting hole (212) at the top of the two connecting pieces (211). The support shaft (213) is rotatably connected to the pressure head (221). A connecting shaft (214) passes through the connecting hole (212) at the bottom of the two connecting pieces (211). The connecting shaft (214) is detachably connected to the support frame (1).

4. The supporting device for the trolley according to claim 3, characterized in that, The two connecting holes (212) of the connecting piece (211) are both oblong holes, and the length direction of the oblong holes is the same as the length direction of the connecting piece (211).

5. The supporting device for a trolley according to claim 1, characterized in that, The surface of the pressure head (221) facing away from the pressure rod (222) is a smooth convex curved surface (223).

6. The supporting device for a trolley according to claim 5, characterized in that, A limiting plate (224) is fixed at one end of the pressure bar (222) away from the pressure head (221). There are two limiting plates (224). The two limiting plates (224) are symmetrically distributed on both sides of the pressure bar (222), and the two limiting plates (224) can be just locked on both sides of the track beam (3).

7. The supporting device for a trolley according to claim 6, characterized in that, A handle (225) is fixed to the end of the pressure bar (222) away from the pressure head (221). The handle (225) is located on the side of the pressure bar (222) away from the limiting plate (224).

8. The supporting device for a trolley according to claim 7, characterized in that, The handle (225) is covered with a rubber sleeve (226).

9. The supporting device for a trolley according to claim 2, characterized in that, The supporting frame (1) is a rectangular frame with a hollow interior and an open top.

10. The supporting device for a trolley according to claim 9, characterized in that, Connecting plates (11) are fixed on the side walls on both sides of the support frame (1). A sleeve (12) is fixed on the top of each connecting plate (11). The sleeve (12) is sleeved on the outside of the connecting shaft (214) of the corresponding hanger (21).

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