Self-adaptive heavy-load drawing platform

Abstract

The invention discloses a self-adaptive heavy-load drawing platform which comprises a lower rail, an upper rail, an upper rail and a lower rail. The upper bracket is arranged above the lower rail in a crossing manner; the limiting pressing wheel sets are arranged on the two sides of the upper bracket; the screw rod is arranged on the bracket in a penetrating manner; and the self-adaptive combined nut seat is arranged at the central position of the upper bracket and is in threaded connection with the screw rod. According to the heavy-load equipment drawing and pulling system, a set of complete heavy-load equipment drawing and pulling system is formed by arranging the structural combination of the lower rail, the upper bracket, the limiting pressing wheel set, the lead screw and the self-adaptive combined nut seat, and the self-adaptive combined nut seat allows the angle of the lead screw nut to be adjusted within a certain range; smooth meshing of the lead screw and the nut can still be kept when the upper bracket inclines due to uneven loads, the lead screw corrugated protection sleeve is additionally arranged to effectively prevent dust and foreign matter, the problems that cost is high and drawing is not smooth due to the fact that dust is prone to accumulating when the upper bracket is used outdoors are solved, manufacturing cost is remarkably reduced, and using reliability of equipment is improved.

Description

Technical Field

[0001] The invention relates to the field of vehicle engineering, and in particular to an adaptive heavy-load pulling platform. Background Art

[0002] With the increasing integration of special vehicles, modern special vehicles often need to be equipped with a variety of heavy-duty equipment, such as heavy-duty generator sets, special operation equipment, large refrigeration units, and complex communication equipment. The weight of these equipment is usually over 500kg, and some large equipment even exceeds 1000kg. The reliability of these heavy-duty equipment is directly related to the normal operation of the vehicle and the completion of the task. Therefore, regular maintenance of these heavy-duty equipment is crucial. However, due to the complex structure and large size of the equipment, it is very difficult to perform maintenance operations in the limited space of the vehicle.

[0003] At present, in order to facilitate the installation and maintenance of equipment, the equipment is usually installed on a retractable platform so that part of the equipment can be pulled out for maintenance. Common pull-out platforms generally adopt a heavy-duty three-section guide rail design. The cost of this solution is high, and the cost of each set of guide rails is usually more than 5,000 yuan, which significantly increases the manufacturing cost of special vehicles. In addition, the structure of the three-section guide rail is relatively large, occupying valuable space in the vehicle, which is not conducive to the overall layout and lightweight design of the vehicle. Its installation and debugging process is also relatively complicated, requiring professional technicians to operate, which increases the installation cost and time.

[0004] Although the three-section guide rail design works well in indoor environments, in the actual use of special vehicles, especially in open-air environments, the guide rails are prone to dust accumulation. The dust accumulated in the ball and roller grooves will form a grinding paste after mixing with the lubricating oil, which accelerates the wear of parts and causes poor pulling and pulling. Cleaning these dirt requires disassembling the guide rails, which is cumbersome and costly. In addition, when the center of gravity of heavy-duty equipment is offset, the guide rails will be subjected to uneven loads and easily get stuck, which not only affects normal operations but may also cause equipment damage. Due to the heavy weight of the equipment and the large friction resistance of the guide rail system, manual pushing and pulling is also very laborious, and often requires 2-3 people to work together, which reduces work efficiency and increases safety hazards. After long-term use, the guide rails are prone to wear and deformation and need to be replaced, further increasing maintenance costs. In addition, as the weight of the equipment continues to increase, the load-bearing capacity of traditional heavy-duty three-section guide rails has gradually reached its limit, making it difficult to meet the installation requirements of heavier equipment.

[0005] Due to the complex structure and lack of adaptive ability of the heavy-duty three-section guide rail, it has poor environmental adaptability, low operational reliability, laborious operation, poor ergonomics and limited service life. Therefore, there is an urgent need for a heavy-duty pull-out platform with lower cost, easier operation, stronger adaptability, more convenient pull-out and better load-bearing capacity. Summary of the invention

[0006] The technical problem to be solved by the present invention is to solve the technical problems of high cost, easy dust accumulation resulting in poor pulling and pulling, and laborious manual pushing and pulling in the existing heavy-duty three-section guide rails in the pulling-out platform of special vehicle heavy-load equipment, and to provide a low-cost, labor-saving, adaptive heavy-load pulling-out platform.

[0007] The technical solution adopted by the present invention to solve the technical problem is:

[0008] An adaptive heavy-load pulling platform, comprising:

[0009] Lower rail, the lower rail is arranged on the vehicle body;

[0010] An upper bracket, the upper bracket is arranged across the lower rail;

[0011] A limit pressing wheel assembly, which is arranged on both sides of the upper bracket;

[0012] A screw rod, which is arranged on the bracket through and through;

[0013] The adaptive combination nut seat is arranged at the central position of the upper bracket and is threadedly connected with the lead screw.

[0014] Preferably, the adaptive combined nut seat comprises:

[0015] A screw nut, the screw nut is matched with the screw thread;

[0016] A pressing plate, which is arranged above the screw nut;

[0017] A screw nut seat, wherein a cavity for accommodating the screw nut is provided in the screw nut seat;

[0018] A support is fixed to the upper bracket and connected to the screw nut seat.

[0019] Preferably, the upper bracket comprises:

[0020] front cross brace, square tube and rear cross brace;

[0021] Upper rails, which are symmetrically arranged on both sides;

[0022] An oblique wedge block, which is arranged on the upper rail and the square tube;

[0023] The front shaft sleeve, the middle shaft sleeve and the rear shaft sleeve are respectively arranged on the front cross brace, the square tube and the rear cross brace, and are located on the same axis.

[0024] Preferably, the position limiting pressing wheel set includes three groups of position limiting pressing wheels, and each group of position limiting pressing wheels includes:

[0025] A deep groove ball bearing, the deep groove ball bearing is in contact with the surface of the upper bracket;

[0026] A shaft sleeve and a shaft, wherein the shaft sleeve and the shaft are connected to the deep groove ball bearing and are used to fix the deep groove ball bearing;

[0027] The support plate and the rib plate are connected to the shaft sleeve and are used to support and fix the shaft sleeve.

[0028] Preferably, the lower rail comprises:

[0029] A guide rail, used to provide guidance for the upper bracket;

[0030] Rollers and shafts, the rollers and shafts are arranged on the guide rails;

[0031] A rear baffle is arranged at the end of the guide rail.

[0032] Preferably, the screw rod outer sleeve is provided with a screw rod corrugated protective sleeve.

[0033] Preferably, a hand crank port is provided at one end of the screw rod, and the hand crank port is used to connect to the driving device.

[0034] The technical effects that can be achieved by the present invention include the following:

[0035] 1. The present invention forms a complete heavy-duty equipment pulling and drawing system by arranging a structural combination of a lower rail, an upper bracket, a limit pressure wheel group, a screw rod and an adaptive combination nut seat, wherein the adaptive combination nut seat allows the screw rod and the nut to adjust their angles within a certain range, ensuring that the screw rod and the nut can still be smoothly engaged when the upper bracket is tilted due to uneven load, and a corrugated screw rod protective cover is added to effectively prevent dust and foreign matter, thereby solving the problems of high cost and poor pulling and drawing caused by dust accumulation in outdoor use, significantly reducing manufacturing costs and improving the reliability of equipment use.

[0036] 2. The present invention forms an adaptively adjustable transmission system by arranging a screw nut, a pressure plate, a nut seat and a support with a preset movable space in the adaptive combination nut seat, and combining it with a limit pressure wheel group, thereby realizing the smooth movement of the upper bracket under heavy load and uneven force conditions; compared with the manual push-pull method, the present invention adopts a screw transmission structure, which effectively solves the problem of laborious movement of heavy-loaded equipment. At the same time, through the design of the adaptive combination nut seat, the risk of mechanical jamming due to uneven force is avoided, which greatly improves the operational convenience and safety of equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a diagram showing the installation state of the adaptive pull-out platform in Example 1;

[0038] Figure 2 This is a schematic diagram of the overall structure of the pull-out platform in Example 1;

[0039] Figure 3This is a state diagram of the self-adaptive pull-out platform in Example 1;

[0040] Figure 4 This is a structural diagram of the drawer platform in the drawn-out state in Embodiment 1;

[0041] Figure 5 This is a schematic diagram of the lower rail structure in Example 1;

[0042] Figure 6 This is a schematic diagram of the upper bracket structure in Example 1;

[0043] Figure 7 This is a schematic diagram of the structure of the adaptive combined nut seat in Example 1;

[0044] Figure 8 It is a structural schematic diagram of the limiting pulley assembly in Example 1;

[0045] Fig. 9 It is a structural schematic diagram of the limiting pulley in Example 1;

[0046] Fig.10 This is a position relationship diagram of the lower rail, upper bracket and limiting pressure wheel in Example 1.

[0047] Figure numerals: 1. lower rail; 11. guide rail; 12. roller; 13. rear baffle; 2. upper bracket; 21. front cross brace; 22. square tube; 23. rear cross brace; 24. upper rail; 25. oblique wedge; 3. limit pressure wheel assembly; 31. deep groove ball bearing; 32. bushing; 33. support plate; 34. rib plate; 4. screw; 5. hand crank; 6. screw corrugated protective cover; 7. adaptive combination nut seat; 71. screw nut; 72. pressure plate; 73. screw nut seat; 74. support; 8. heavy-duty equipment. DETAILED DESCRIPTION

[0048] The present invention is further described below in conjunction with the accompanying drawings and examples, but these specific implementation schemes do not limit the protection scope of the present invention in any way.

[0049] Example 1

[0050] See attached Figure 1-10 The invention discloses an adaptive heavy-load pull-out platform, wherein the bottom of the pull-out platform is connected to the vehicle body, and the heavy-load equipment 8 is placed on the top. The pull-out platform comprises a lower rail 1, an upper bracket 2, a limit pressure wheel set 3, a screw rod 4 and an adaptive combination nut seat 7. The pull-out platform is mainly used for the installation and protection of the heavy-load equipment 8 of a special vehicle, and can smoothly pull out the heavy-duty equipment (such as a generator set) on the vehicle, which is convenient for maintenance operations.

[0051] See Figure 1 , 25. In this embodiment, the lower rail 1 is installed on the vehicle body by bolts. It is located at the bottom of the pull-out platform and is the guiding basic component of the entire platform. The lower rail 1 supports the upper bracket 2 in a horizontal state. The lower rail 1 slides with the upper bracket 2 to ensure that the upper bracket 2 moves smoothly on the horizontal plane and provides a stable movement reference for other components.

[0052] The lower rail 1 includes a guide rail 11, a roller 12 and an axis and a rear baffle 13. The guide rail 11 provides a sliding guide for the upper bracket 2 and the limiting pressure wheel group 3. The roller 12 and the axis provide support for the sliding of the upper bracket 2 to reduce friction. The rear baffle 13 limits the movement range of the upper bracket 2 to prevent it from exceeding the designed stroke.

[0053] See Figure 6 , 10 In this embodiment, the upper bracket 2 is a "X"-shaped structure, which spans over the lower rail 1, surrounds the lower rail 1 and is in sliding contact with it. The main function of the upper bracket 2 is to carry the heavy-load equipment 8, and at the same time, it cooperates with the lower rail 1 through the limit pressure wheel set 3 to ensure that the whole moves smoothly on the lower rail 1.

[0054] A limiting pressure wheel set 3 is also provided on both sides of the upper bracket 2. The limiting pressure wheel set 3 plays a role in limiting lateral deviation when in contact with the upper bracket 2, thereby ensuring the stability of movement.

[0055] Specifically, the upper bracket 2 includes a front cross brace 21, a square tube 22, a rear cross brace 23, a bilaterally symmetrical upper rail 24, an oblique wedge block 25 disposed on the upper rail 24 and the square tube 22, and a front shaft sleeve, a middle shaft sleeve and a rear shaft sleeve disposed on the front cross brace 21, the square tube 22 and the rear cross brace 23, respectively, and the front shaft sleeve, the middle shaft sleeve and the rear shaft sleeve are disposed at the same axis position. Among them, the oblique wedge block 25 is used to strengthen the overall rigidity of the bracket to prevent the bracket from excessive deformation under heavy load; the front baffle and the rear baffle are used to limit the range of motion of the bracket to prevent it from excessive movement.

[0056] See Figure 8-10 In this embodiment, the limiting pressure wheel set 3 is installed on the vehicle body by bolts and relatively installed on the inner side of the upper bracket 2. The limiting pressure wheel set 3 is in close contact with the surface of the upper bracket 2. The main function of the limiting pressure wheel set 3 is to limit the lateral displacement of the upper bracket 2 by rolling with the contact surface of the upper bracket 2, and to assist the upper bracket 2 to move along the longitudinal direction of the lower rail 1 when pulling and pulling without lateral prying.

[0057] The limiting pressure wheel group 3 includes three groups of limiting pressure wheels, each of which includes a deep groove ball bearing 31, a sleeve 32 and a shaft, a support plate 33 and a rib plate 34. The deep groove ball bearing 31 contacts the surface of the upper bracket 2 to provide stable rolling support and reduce friction; the sleeve 32 and the shaft fix the pressure wheel on both sides of the upper bracket 2, and the support plate 33 and the rib plate 34 provide support and fixation for the entire limiting pressure wheel group 3 to ensure its stable connection with the upper bracket 2. The limiting pressure wheel group 3 is connected to both sides of the upper bracket 2 through the support plate 33 and the rib plate 34 to ensure that the upper bracket 2 will not be laterally pried and deviated when sliding on the lower rail 1.

[0058] See Figure 1-4 In this embodiment, the screw rod 4 runs through the entire pulling platform horizontally, is located in the middle of the upper bracket 2, and passes through the front sleeve, the middle sleeve and the rear sleeve in sequence.

[0059] The hand crank port 5 is located at one end of the screw rod 4, and one end of the screw rod 4 is connected to an external hand crank (or electric wrench) through the hand crank port 5. The user can drive the screw rod 4 to rotate by turning the hand crank.

[0060] The screw rod 4 and the upper bracket 2 are also connected through an adaptive combination nut seat 7. The rotation of the screw rod 4 drives the adaptive combination nut seat 7 to move linearly, thereby pushing the upper bracket 2 to move along the lower rail 1 to realize the pulling function of the heavy-load equipment 8.

[0061] The outer side of the screw rod 4 is provided with a screw rod corrugated protective sleeve 6, which is used to protect the screw rod 4 from external pollutants such as dust and debris, and ensure that the screw rod 4 maintains a stable and smooth rotation during the working process. The protective sleeve 6 also plays a certain buffering role to prevent the screw rod 4 from being damaged by external forces.

[0062] See Figure 1-4 And 7, the adaptive combination nut seat 7 is installed in the center of the upper bracket 2, including a screw nut 71, a pressure plate 72, a screw nut seat 73 and a support 74. The adaptive combination nut seat 7 allows the screw 4 to adjust its angle within a certain range as the angle of the upper bracket 2 changes, so that it can adapt to the angle change of the screw 4 when the upper bracket 2 is tilted, avoiding the problem of the screw 4 and the screw nut 71 being stuck due to the tilt of the upper bracket 2, thereby maintaining the smoothness of the movement and preventing damage to the equipment.

[0063] Specifically, the screw nut 71 is directly engaged with the screw 4, and adopts a trapezoidal thread structure, which matches the thread of the screw 4. When the screw 4 rotates, the screw nut 71 moves accordingly, thereby realizing power transmission, pushing the upper bracket 2 to move along the direction of the screw 4, and the internal thread of the nut 71 is engaged with the screw 4, but in the adaptive combined nut seat 7, the screw nut 71 can rotate and move within a certain range to adapt to the tilt of the upper bracket 2.

[0064] The pressure plate 72 is located above the screw nut 71 and plays a role in fixing the screw nut 71. The pressure plate 72 fixes the screw nut 71 in the nut seat 73 through a certain pre-tightening force, and at the same time allows the screw nut 71 to have a certain amount of movement space when adapting to tilting. The function of the pressure plate 72 is to ensure that the nut 71 does not loosen under normal working conditions, but allows the nut 71 to fine-tune the angle together with the screw 4 when the upper bracket 2 is tilted to avoid getting stuck.

[0065] The screw nut seat 73 is the supporting structure of the entire adaptive combined nut seat 7, responsible for carrying the screw nut 71 and the pressure plate 72. The nut seat 73 is fixed to the central part of the upper bracket 2 by bolts to ensure that the nut seat 73 moves synchronously with the upper bracket 2. The design of the nut seat 73 allows the screw nut 71 to rotate relatively freely and translate slightly within a certain range, so that when the upper bracket 2 is tilted, the screw nut 71 can adapt to its angle change together with the screw 4.

[0066] The support 74 is the base part of the adaptive combined nut seat 7, which is fixed to the frame of the upper bracket 2 by bolts. It provides a stable support for the entire nut seat 73, ensures that the nut seat 73 is firmly connected to the upper bracket 2, and ensures that the nut seat 73 can remain stable during the movement of the upper bracket 2, preventing the structure from loosening due to changes in external loads.

[0067] In this embodiment, the screw rod 4 runs through the entire pull-out platform and is meshed with the screw nut 71 through a trapezoidal thread. When the operator rotates the screw rod 4 through the hand crank 5, the screw rod 4 drives the screw nut 71 to move along the axis of the screw rod 4, thereby driving the entire nut seat 73 and the upper bracket 2 to move. Due to the adaptive design of the nut seat 73, when the upper bracket 2 is slightly tilted under the action of the heavy-load device 8, the screw nut 71 can tilt with the screw rod 4 to prevent it from getting stuck due to angle mismatch. In this way, the rotational movement of the screw rod 4 can be smoothly converted into the linear movement of the upper bracket 2.

[0068] The upper bracket 2 fixes the adaptive combination nut seat 7 at its central position by bolts. The connection between the adaptive combination nut seat 7 and the upper bracket 2 ensures that the upper bracket 2 can move smoothly under the drive of the screw rod 4. When the upper bracket 2 is tilted due to the weight of the heavy-load equipment 8, the adaptive combination nut seat 7 allows the screw nut 71 to adjust the angle together with the screw rod 4, thereby avoiding mechanical jamming of the platform due to uneven force.

[0069] Although the limiting pressure wheel assembly 3 mainly plays the role of limiting the lateral deviation of the upper bracket 2, it indirectly cooperates with the adaptive combination nut seat 7. When the upper bracket 2 tilts, the limiting pressure wheel assembly 3 limits the excessive tilt of the upper bracket 2 through rolling contact with the upper bracket 2, thereby maintaining the smooth movement of the platform. This limiting effect can reduce the working pressure of the adaptive combination nut seat 7 and ensure that the adaptive adjustment of the screw nut 71 is carried out within a reasonable range.

[0070] The connection between the hand crank 5 and the screw rod 4 allows the operator to drive the screw rod 4 to rotate by rotating the hand crank or using an electric wrench. When the hand crank 5 rotates, the screw rod 4 drives the screw rod nut 71 to move, and the nut seat 73 then drives the upper bracket 2 to move. In this process, the adaptive function of the adaptive combination nut seat 7 ensures that the screw rod 4 and the screw rod nut 71 can maintain smooth linkage even when the upper bracket 2 is tilted.

[0071] The working principle and method of an adaptive heavy-load pull-out platform in this embodiment are as follows:

[0072] In the first step, the operator checks the tightness of the bolts connecting the lower rail 1 and the vehicle body, confirms that the contact state between the limit pressure wheel of the limit pressure wheel group 3 and the surface of the upper bracket 2 is normal, and the deep groove ball bearing 31 can rotate flexibly. At the same time, check whether the screw corrugated protective sleeve 6 is intact and ensure that the screw 4 is clean and properly lubricated.

[0073] The second step is to install the heavy-load equipment 8 on the upper bracket 2. The operator needs to ensure that the weight distribution of the heavy-load equipment 8 is as even as possible and check that all fixed points are connected reliably. Connect the hand crank or electric wrench through the hand crank port 5, slowly turn the screw 4 for a test run, observe the movement of the upper bracket 2, and confirm that the limit pressure wheel group 3 works normally and the upper bracket 2 has no obvious lateral deviation.

[0074] The third step is to officially start the platform operation. The operator rotates the hand crank at a constant speed to drive the screw 4 to rotate. The screw 4 transmits power through the trapezoidal thread and the screw nut 71. In this process, if the upper bracket 2 is slightly tilted due to the weight of the heavy-loaded equipment 8, the adaptive combination nut seat 7 will automatically adjust the angle, and the screw nut 71 will rotate with the screw 4 within the range allowed by the pressure plate 72 to ensure smooth operation.

[0075] When the upper bracket 2 tilts during operation, the adaptive combination nut seat 7 plays its core role: the screw nut 71 can adjust the angle together with the screw 4 in the movable space reserved by the pressure plate 72, while the nut seat 73 maintains a stable relative position with the upper bracket 2, and the limiting pressure wheel group 3 continuously limits the lateral displacement of the upper bracket 2 through rolling contact. The three work together to ensure the smooth operation of the entire system.

[0076] During the entire operation, the operator can adjust the position of the upper bracket 2 at any time according to maintenance needs. When reaching the target position, stop rotating the screw rod 4 to confirm that the position of the heavy-duty device 8 is suitable for maintenance operations. If necessary, fine adjustments can be made to obtain the best maintenance operation position.

[0077] Finally, after the maintenance work is completed, the operator turns the screw 4 in the opposite direction to return the upper bracket 2. During the return process, it is also necessary to observe the operating status to ensure that the upper bracket 2 returns to the initial position smoothly. After arriving at the original position, remove the hand crank or power tool and perform a routine inspection of the entire system, including checking the tightening status of each connecting bolt, cleaning the dust and debris on the surface of the lower rail 1, lubricating the screw 4 and the deep groove ball bearing 31 appropriately, and adjusting the preload of the pressure plate 72 if necessary, to prepare for the next use.

[0078] The beneficial effects that can be achieved by the adaptive heavy-load pull-out platform in this embodiment include:

[0079] By designing an adaptive combined nut seat, including a screw nut that can be freely adjusted within a preset space, a pressure plate with preload, and a support fixed to the upper bracket, a transmission system that can adapt to angle changes is formed. Compared with the fixed transmission method of ordinary heavy-duty pull-out guide rails, it effectively solves the problem of transmission jamming caused by bracket tilt under heavy load conditions, and significantly improves the operating reliability and service life of the pull-out platform.

[0080] By setting three sets of limit pressure rollers on both sides of the upper bracket, using deep groove ball bearings to roll in contact with the surface of the upper bracket, and forming a stable connection through the support plate and rib plate, a complete guide limit system is formed. Compared with the problem of lateral deviation easily generated by traditional guide rail pull-out platforms, the present invention effectively solves the stability problem during the movement of heavy-load equipment and greatly improves the operation accuracy and safety.

[0081] By adopting a through-type screw transmission structure, combined with the support of the front, middle and rear shaft sleeves and the protection of the corrugated protective sleeve, a low-cost and high-efficiency power transmission system is formed. Compared with traditional manual push-pull or complex drive mechanisms, the present invention effectively solves the problem of laborious movement of heavy-duty equipment and high maintenance costs, and significantly improves the convenience and economy of operation.

[0082] The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of protection of the present invention. Any innovative improvement or replacement based on the present invention shall fall within the scope of the claims of the present invention. At the same time, the various parameters, materials, and processes mentioned in the above embodiments are not exclusive. Without departing from the technical essence of the present invention, a person of ordinary skill in the art may make various alternatives, and these alternatives shall also be deemed to fall within the scope of protection of the present invention.

Claims

1. An adaptive heavy-load pulling platform, characterized in that: include: Lower rail, the lower rail is arranged on the vehicle body; An upper bracket, the upper bracket is arranged across the lower rail; A limit pressing wheel assembly, which is arranged on both sides of the upper bracket; A screw rod, which is arranged on the bracket through and through; The adaptive combination nut seat is arranged at the central position of the upper bracket and is threadedly connected with the lead screw.

2. The adaptive heavy-load pulling platform according to claim 1, characterized in that: The adaptive combined nut seat comprises: A screw nut, the screw nut is matched with the screw thread; A pressing plate, which is arranged above the screw nut; A screw nut seat, wherein a cavity for accommodating the screw nut is provided in the screw nut seat; A support is fixed to the upper bracket and connected to the screw nut seat.

3. The adaptive heavy-load pulling platform according to claim 1, characterized in that: The upper bracket comprises: front cross brace, square tube and rear cross brace; Upper rails, which are symmetrically arranged on both sides; An oblique wedge block, which is arranged on the upper rail and the square tube; The front shaft sleeve, the middle shaft sleeve and the rear shaft sleeve are respectively arranged on the front cross brace, the square tube and the rear cross brace, and are located on the same axis.

4. The adaptive heavy-load pulling platform according to claim 1, characterized in that: The position limiting pressing wheel group includes three groups of position limiting pressing wheels, and each group of position limiting pressing wheels includes: A deep groove ball bearing, the deep groove ball bearing is in contact with the surface of the upper bracket; A shaft sleeve and a shaft, wherein the shaft sleeve and the shaft are connected to the deep groove ball bearing and are used to fix the deep groove ball bearing; The support plate and the rib plate are connected to the shaft sleeve and are used to support and fix the shaft sleeve.

5. The adaptive heavy-load pulling platform according to claim 1, characterized in that: The lower rail comprises: A guide rail, used to provide guidance for the upper bracket; Rollers and shafts, the rollers and shafts are arranged on the guide rails; A rear baffle is arranged at the end of the guide rail.

6. The adaptive heavy-load pulling platform according to claim 1, characterized in that: The screw rod outer sleeve is provided with a screw rod corrugated protective sleeve.

7. The adaptive heavy-load pulling platform according to claim 1, characterized in that: One end of the screw rod is provided with a hand crank port, and the hand crank port is used for connecting a driving device.

Images