Carrying platform capable of being adjusted in multiple dimensions

Abstract

The multi-dimensional adjustable carrying platform comprises a carrying device, width expansion assemblies, height expansion assemblies and clamping assemblies, the two width expansion assemblies are installed on the two sides of the carrying device in the length direction, and the two width expansion assemblies can synchronously get close to or get away from the carrying device in the width direction of the carrying device; the two height extension assemblies are installed on the upper surfaces of the two width extension assemblies correspondingly, the two height extension assemblies can be synchronously close to or away from the carrying device in the height direction of the carrying device, and the width extension assemblies and the height extension assemblies jointly form a dynamically-adjustable containing space; the two clamping assemblies are installed on the sides, close to each other, of the two height extension assemblies, and when carrying operation is executed, the two clamping assemblies symmetrically tighten to stably clamp the two sides of the article in the length direction. And through cooperative linkage of the width and height expansion assembly and the clamping assembly, the boundary dimensions of the articles are adjusted in a self-adaptive mode, and the stability of the articles of different sizes in the carrying process is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of mechanical equipment handling devices, specifically a handling platform that can be adjusted in multiple dimensions. Background Technology

[0002] In modern industrial production, efficient transportation of machinery is crucial for improving production efficiency and reducing labor intensity. Currently, most mainstream pallet trucks adopt traditional frame structures, relying on wheeled movement mechanisms and hydraulic lifting systems for loading and unloading goods. While these meet basic handling needs, their fixed structural layout results in poor dimensional adaptability. They lack dynamic expansion and adjustment capabilities for different specifications of machinery and cannot adaptively adjust according to the actual height of the equipment, the degree of bumps in the transport path, or the tilt angle. When transporting very tall equipment, insufficient fixed baffle height leads to a lack of top support, making the equipment prone to tipping over when its center of gravity shifts. Conversely, when handling low-profile equipment, excessively high baffles hinder loading and unloading operations, and the fixed structure is prone to fatigue fracture due to stress concentration under long-term vibration, posing significant safety hazards. Summary of the Invention

[0003] Purpose of the invention: To overcome the shortcomings of existing technologies, this invention provides a multi-dimensional adjustable handling platform. Through the coordinated operation of width and height extension components and clamping components, it achieves adaptive adjustment of the lateral and vertical dimensions of items. Combined with elastic clamping and intelligent control, it ensures the stable fixation of items of different sizes during handling, improving handling efficiency and safety.

[0004] Technical Solution: To achieve the above objectives, the present invention provides a multi-dimensional adjustable handling platform, comprising a handling device, a width extension component, a height extension component, and a clamping component. Two width extension components are installed on both sides of the handling device along the length direction a, and the two width extension components can synchronously move closer to or away from the handling device along the width direction b. Two height extension components are respectively installed on the upper surfaces of the two width extension components, and each height extension component can move together with its corresponding width extension component, and the two height extension components can synchronously move closer to or away from the handling device along the height direction c. The width extension components and the height extension components together constitute a dynamically adjustable accommodating space. Two clamping components are installed on the side of the two height extension components that are close to each other, and each clamping component can move synchronously with its corresponding height extension component. When performing a handling operation, the two width extension components adaptively expand laterally according to the dimensions of the item, and the two height extension components dynamically adjust vertically according to the dimensions of the item to form a matching vertical support surface. The two clamping components securely clamp the item on both sides of the length direction a through symmetrical tightening actions.

[0005] Furthermore, the transport device includes a cargo truck body, the internal space of which is evenly divided into a first adjustment cavity and a second adjustment cavity by a load-bearing beam. A bidirectional drive device is fixedly installed at the center of the load-bearing beam. The two drive shafts of the bidirectional drive device are located in the first and second adjustment cavities, respectively, and a first lead screw and a second lead screw are coaxially arranged on the two drive shafts. The two width extension components are respectively connected to the first lead screw and the second lead screw. The bidirectional drive device can drive the two width extension components to move synchronously along the width direction of the transport device through the first lead screw and the second lead screw.

[0006] Furthermore, the load-bearing beam is rotatably fitted with a first rotating shaft and a second rotating shaft, and the first rotating shaft and the second rotating shaft are symmetrically arranged with respect to the bidirectional drive device. The bidirectional drive device drives the first rotating shaft and the second rotating shaft to rotate simultaneously through a linkage component. The two height extension components are simultaneously connected to the first rotating shaft and the second rotating shaft for transmission. The bidirectional drive device can drive the two height extension components to move synchronously along the height direction c of the conveying device through the first rotating shaft and the second rotating shaft.

[0007] Furthermore, the linkage assembly includes at least a set of driving wheels, a first driven wheel, a second driven wheel, and a transmission chain. The driving wheel is coaxially mounted on any one of the drive shafts of the bidirectional drive device. The first driven wheel is coaxially mounted on a first rotating shaft, and the second driven wheel is coaxially mounted on a second rotating shaft. The transmission chain simultaneously surrounds the driving wheel, the first driven wheel, and the second driven wheel. The bidirectional drive device can drive the first driven wheel and the second driven wheel to rotate synchronously through the driving wheel and the transmission chain.

[0008] Furthermore, each of the width extension components includes a width extension seat, a drive plate, and connecting columns. The width extension seats are respectively disposed on one side of the transport device along the length direction. The drive plate is located in the first adjustment cavity or the second adjustment cavity and is drivenly connected to the first lead screw or the second lead screw. Both connecting columns are located between the width extension seat and the drive plate, and the two connecting columns are symmetrically arranged with respect to the bidirectional drive device. One end of each connecting column is fixedly connected to the drive plate, and the other end passes through the side wall of the truck body and is fixedly connected to the width extension seat. When the bidirectional drive device drives the first lead screw and the second lead screw to rotate, the drive plate can carry the width extension seat to move horizontally relative to the truck body along the axis of the first lead screw or the second lead screw through the connecting columns.

[0009] Furthermore, each of the height extension components includes a height transmission component, a support guide plate, and a vertically moving side plate. The height transmission component is disposed on the width extension seat, and its driving end is drivenly connected to the vertically moving side plate, while its driven end is drivenly connected to the bidirectional drive device through a linkage component. A plurality of support guide plates are equidistantly disposed on the upper surface of the width extension seat along the length direction of the transport device, and each support guide plate is slidably engaged with the vertically moving side plate. The bidirectional drive device can drive the vertically moving side plate to move vertically relative to the cargo vehicle body along the height direction c of the transport device through the linkage component and the height transmission component. The sliding engagement between each support guide plate and the vertically moving side plate can guide the vertical movement of the vertically moving side plate relative to the cargo vehicle body.

[0010] Furthermore, each of the height transmission components includes at least two sets of coupling assemblies, a first follower wheel, a second follower wheel, a first vertical drive wheel, a second vertical drive wheel, a first vertical drive screw, and a second vertical drive screw. The two coupling assemblies are coaxially mounted on the first rotating shaft and the second rotating shaft, and the ends of the two coupling assemblies away from the load-bearing beam pass through the side wall of the truck body and into the width extension seat. The ends of the two coupling assemblies in the width extension seat are coaxially connected to the first follower wheel and the second follower wheel. The first vertical drive wheel and the second vertical drive wheel are rotatably mounted in the width extension seat and are respectively engaged with the first follower wheel and the second follower wheel. The first vertical drive screw and the second vertical drive screw are coaxially mounted on the first vertical drive wheel and the second vertical drive wheel. The first vertical drive screw and the second vertical drive screw are simultaneously driven connected to the vertical moving side plate. The bidirectional drive device can drive the first vertical drive screw and the second vertical drive screw to rotate synchronously through the first rotating shaft and the second rotating shaft.

[0011] Furthermore, each of the aforementioned coupling assemblies includes a sleeve shaft, a clutch, and an adjusting shaft; the sleeve shaft is coaxially sleeved on the first rotating shaft or the second rotating shaft, and both sleeve shafts simultaneously slide in contact with the drive plate and the housing of the cargo truck body; the adjusting shaft is coaxially disposed outside the end of the sleeve shaft away from the load-bearing beam, and is drivenly connected to the first follower wheel or the second follower wheel; the clutch is disposed between the sleeve shaft and the adjusting shaft, and the clutch can control the engagement or disengagement of the sleeve shaft and the adjusting shaft.

[0012] Furthermore, the coupling assembly also includes a synchronous support plate and a connecting sleeve. The synchronous support plate is fixedly disposed within the width extension seat, and the connecting sleeve is rotatably connected to the synchronous support plate. The adjusting shaft is coaxially sleeved within the connecting sleeve. The first follower wheel or the second follower wheel is coaxially fixedly disposed at the end of the connecting sleeve away from the synchronous support plate. The adjusting shaft, clutch, sleeve shaft, first follower wheel, and second follower wheel all move synchronously with the width extension seat through the connecting sleeve and the synchronous support plate.

[0013] Furthermore, the outer circumferential surface of the adjusting shaft is provided with a plurality of adjusting grooves arranged in a circular array along its own axial direction, and the inner circumferential surface of the connecting sleeve is provided with a plurality of sliders arranged in a circular array to slide in the adjusting grooves; the inner circumferential surface of the sleeve shaft is provided with a plurality of guide bars arranged in a circular array along its own axial direction, and the circumferential surfaces of the first rotating shaft and the second rotating shaft are both provided with a plurality of guide grooves arranged in a circular array to slide in the guide bars; the sliding engagement of the guide bars and the guide grooves enables the sleeve shaft to always rotate synchronously with the first rotating shaft or the second rotating shaft, and the adjusting grooves and sliders constitute a compensation structure.

[0014] Furthermore, each of the clamping components includes a clamping plate, a sliding seat, a connecting block, and a spring; the clamping plate is located between the two vertically moving side plates, the two connecting blocks are disposed between the clamping plate and one vertically moving side plate, the two sliding seats are slidably engaged with the side of the clamping plate near the vertically moving side plate, one end of each connecting block is symmetrically hinged to the side of the vertically moving side plate near the clamping plate, and the other end is respectively hinged to the two sliding seats, and the two ends of the spring are respectively connected to the sides of the two sliding seats that are close to each other. Under the action of the spring, the two clamping plates always tend to move closer to each other, and when the width expansion component is in the maximum expansion position, the clamping plate still maintains an effective clamping force on the item.

[0015] Furthermore, a method for moving items using a multi-dimensional adjustable handling platform includes the following steps:

[0016] S1: Expanding the carrying space: The bidirectional drive device is activated by the control system, which drives the two width expansion components to move away from the carrying device synchronously along the width direction b of the carrying device. At the same time, the clutch engages the sleeve shaft and the adjusting shaft, so that the two height expansion components move away from the carrying device synchronously along the height direction c of the carrying device, forming an initial carrying space larger than the external dimensions of the item to be carried.

[0017] S2: Place goods: Place the items to be transported into the initial receiving space, with the two sides of the items aligned with the clamping plates of the two clamping components along their length.

[0018] S3: Shrinking the containment space: Reverse drive the bidirectional drive device to make the two width extension components move towards the conveying device synchronously along the width direction b, while keeping the clutch engaged, so that the two height extension components move towards the conveying device synchronously along the height direction c, until the two clamping plates contact the two sides of the length direction a of the item respectively.

[0019] S4: Form a stable clamping grip: Continue to drive the bidirectional drive device to further retract the width extension component and the height extension component. At this time, the spring is compressed, so that the two clamping plates generate an elastic clamping force on the item.

[0020] Beneficial effects: Compared with the prior art, the multi-dimensional adjustable handling platform of the present invention has the following beneficial effects:

[0021] 1. Through a bidirectional drive device and linkage components, the width and height expansion components can be adjusted synchronously or independently to form a dynamically adjustable accommodating space that precisely matches the size of objects with different shapes such as cuboids and cubes.

[0022] 2. The clamping assembly, guided by the spring preload and the telescopic rod, combined with the retraction action of the extension assembly, forms a progressive elastic clamping force, which can provide basic fixation in the initial state and meet the stable clamping required for dynamic handling through active retraction.

[0023] 3. The clutch achieves power decoupling for lateral and vertical adjustment, and with the dual monitoring of pressure sensor and load current, it ensures the reliability of adjustment for items with extreme sizes; the compensation structure eliminates mechanical errors and improves the stability of the transmission system.

[0024] 4. It adopts mature mechanical structures such as screw drive, chain drive and gear pair, and integrates control through the same power source, which simplifies system design and reduces energy consumption and maintenance costs. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the transport platform of the present invention in its unexpanded state;

[0026] Figure 2 This is a schematic diagram of the structure of the handling platform in its extended state according to the present invention;

[0027] Figure 3 This is a schematic diagram of the internal structure distribution of the handling platform described in this invention;

[0028] Figure 4 This is a magnified view of a portion of the image (A).

[0029] Figure 5 This is a schematic diagram of the internal structure of the width extension seat;

[0030] Figure 6 This is a cross-sectional view of the clamping component;

[0031] Figure 7 This is a schematic diagram of the height transmission assembly;

[0032] Figure 8 This is a connection diagram of the coupling assembly;

[0033] Figure 9 A schematic diagram of the structure of the first and second rotating shafts;

[0034] Figure 10 This is a structural diagram of a sleeve shaft, an adjusting shaft, and a connecting sleeve. Detailed Implementation

[0035] The invention will now be further described with reference to the accompanying drawings.

[0036] As attached Figure 1 and 2 As shown, a multi-dimensional adjustable transport platform includes a transport device 1, a width extension component 2, a height extension component 3, and a clamping component 4. Two width extension components 2 are installed on both sides of the transport device 1 along its length direction a, and the two width extension components 2 can synchronously move closer to or away from the transport device 1 along its width direction b. Two height extension components 3 are respectively installed on the upper surfaces of the two width extension components 2. Each height extension component 3 can move together with its corresponding width extension component 2, and the two height extension components 3 can synchronously move closer to or away from the transport device 1 along its height direction c. The width extension components 2 and the height extension components 3 together constitute a dynamically adjustable accommodating space. The horizontal dimension of this dynamically adjustable accommodating space is the width direction b of the transport device 1, and the vertical dimension is the height direction c of the transport device 1. Its horizontal dimension and vertical dimension can be determined by the width extension components 2. The height extension component 3 can be adjusted independently or in conjunction with other components to accommodate items of different shapes and sizes, such as cuboids and cubes, and a support frame for wrapping the items is formed through dynamic adjustment. The two clamping components 4 are installed on the side of the two height extension components 3 that are close to each other. Each clamping device 4 can move together with its corresponding height extension component 3. When performing a handling operation, the two width extension components 2 expand laterally according to the shape and size of the item, and the two height extension components 3 dynamically adjust vertically according to the shape and size of the item to form a matching vertical support surface. The two clamping components 4 are firmly clamped on both sides of the length direction a of the item through symmetrical tightening action. The lateral expansion of the width extension component 2 is used to match the width of the item, the vertical adjustment of the height extension component 3 is used to fit the height of the item, and the symmetrical movement of the clamping action of the clamping components 4 achieves the fixation of the item. The three work together to form a multi-dimensional wrapping fixation of the item.

[0037] like Figure 3As shown, the handling device 1 includes a cargo truck body 6. The internal space of the cargo truck body 6 is evenly divided into a first adjustment cavity 10a and a second adjustment cavity 10b by a load-bearing beam 9. Since the load-bearing beam 9 not only needs to divide the space but, more importantly, needs to bear the main weight of the transported items, it is made of high-strength metal to enable it to bear more weight. A bidirectional drive device 11 is fixedly installed at the center of the load-bearing beam 9. The two drive shafts of the bidirectional drive device 11 are located in the first adjustment cavity 10a and the second adjustment cavity 10b, respectively. When installing the bidirectional drive device 11, it is necessary to ensure that the drive shafts of the bidirectional drive device 11 and the center point of the load-bearing beam 9 are on the same straight line as much as possible, so as to ensure the dynamic balance of the various extension components on the left and right sides of the handling device 1, thereby ensuring... The mirror motion of each extended component on the left and right sides of the conveying device 1; the first lead screw 12a and the second lead screw 12b are coaxially arranged on the two drive shafts respectively, and the two width extended components 2 are respectively connected to the first lead screw 12a and the second lead screw 12b. The first lead screw 12a and the second lead screw 12b are both designed with trapezoidal threads, which have the characteristics of high transmission efficiency and strong load-bearing capacity; the bidirectional drive device 11 can drive the two width extended components 2 to move synchronously along the width direction b of the conveying device 1 through the first lead screw 12a and the second lead screw 12b. The bidirectional drive device 11 can be a dual-axis servo motor or a stepper motor. Through the symmetrical drive design of the bidirectional drive device 11, it is ensured that the extended components on both sides of the conveying device 1 maintain motion synchronization during the adjustment process, and structural displacement is avoided due to uneven force.

[0038] like Figure 1 and 2 As shown, the transport device 1 also includes an energy head 7 and a control lever 8. The energy head 7 is located on one side of the width direction of the cargo vehicle body 6, and a battery is installed inside the energy head 7 as the energy source for the transport platform. The control lever 8 is located at the upper end of the energy head 7, and is equipped with a control switch for controlling the opening and closing of the bidirectional drive device 11 and a control switch for controlling the forward or reverse rotation of the bidirectional drive device 11. The transport device 1, the width extension component 2, and the energy head 7 can be equipped with corresponding driving devices as needed, such as one-way wheels, omnidirectional wheels, track devices, etc. The control lever 8 is connected to the steering control lever of the driving device, and the operator can control the direction of travel of the transport platform by pulling or pushing the control lever 8.

[0039] like Figure 3As shown, a first rotating shaft 13a and a second rotating shaft 13b are rotatably fitted on the load-bearing beam 9, and the first rotating shaft 13a and the second rotating shaft 13b are symmetrically arranged with respect to the bidirectional drive device 11. The bidirectional drive device 11 drives the first rotating shaft 13a and the second rotating shaft 13b to rotate simultaneously through the linkage component 14. The two height extension components 3 are simultaneously connected to the first rotating shaft 13a and the second rotating shaft 13b, that is, the center of the first rotating shaft 13a and the center of the second rotating shaft 13b are rotatably fitted on the load-bearing beam 9, and one end of the first rotating shaft 13a and the second rotating shaft 13b are simultaneously connected to any one of the height extension components 3. The other end is simultaneously connected to another height extension component 3; the bidirectional drive device 11 can drive the two height extension components 3 to move synchronously along the height direction c of the conveying device 1 through the first rotating shaft 13a and the second rotating shaft 13b; the linkage component 14 enables the bidirectional drive device 11 to transmit power to the height extension component 3 simultaneously while driving the width extension component 2, realizing the power integration of lateral and vertical adjustment and simplifying the mechanical structure; and by controlling the lateral expansion of the width extension component 2 and the vertical adjustment of the height extension component 3 through the same power source, it can be ensured that the two move synchronously during the initial expansion or contraction, improving the adjustment efficiency.

[0040] The linkage component 14 includes at least one set of driving wheels 15, a first driven wheel 16a, a second driven wheel 16b, and a transmission chain 17. The driving wheels 15 are coaxially mounted on any one of the drive shafts of the bidirectional drive device 11. The first driven wheel 16a is coaxially mounted on the first rotating shaft 13a, and the second driven wheel 16b is coaxially mounted on the second rotating shaft 13b. The transmission chain 17 simultaneously surrounds the driving wheels 15, the first driven wheel 16a, and the second driven wheel 16b. The transmission chain 17 adopts a roller chain structure, which has the characteristics of smooth transmission and high reliability. The gear ratio of the driving wheel 15 to the first driven wheel 16a and the second driven wheel 16b can be designed according to actual needs to achieve speed matching. The bidirectional drive device 11 can drive the first driven wheel 16a and the second driven wheel 16b to rotate synchronously through the driving wheels 15 and the transmission chain 17. Through the synchronicity of the chain drive, it is ensured that the height extension components 3 on both sides maintain consistent movement during vertical adjustment, and the item is prevented from tilting due to the different support heights on both sides.

[0041] Each of the width extension components 2 includes a width extension seat 18, a drive plate 19, and a connecting post 20. The width extension seats 18 are respectively disposed on one side of the conveying device 1 along the length direction a. The drive plate 19 is located in the first adjustment cavity 10a or the second adjustment cavity 10b and is drivenly connected to the first lead screw 12a or the second lead screw 12b. The drive plate 19 is provided with a nut seat that cooperates with the lead screw. When the lead screw rotates, the nut seat drives the drive plate 19 to move along the lead screw axis. Through the threaded engagement between the lead screw and the nut seat, the rotational motion of the drive shaft of the bidirectional drive device 11 is converted into the linear motion of the width extension component 2. Both connecting posts 20 are located between the width extension seats 18 and the drive plate 19, and the two connecting posts 20 are connected to each other. The bidirectional drive device 11 is symmetrically arranged. One end of each connecting post 20 is fixedly connected to the drive plate 19, and the other end passes through the side wall of the cargo vehicle body 6 and is fixedly connected to the width extension seat 18. The connecting post 20 adopts an optical axis design and forms a sliding fit with the through hole of the side wall of the cargo vehicle body 6. It transmits lateral driving force and provides guidance for the width extension seat 18, reducing swaying during movement. When the bidirectional drive device 11 drives the first lead screw 12a and the second lead screw 12b to rotate, the drive plate 19 can move horizontally relative to the cargo vehicle body 6 along the axis of the first lead screw 12a or the second lead screw 12b. The movement of the drive plate 19 is synchronously transmitted to the width extension seat 18 through the connecting post 20 to realize the lateral expansion or contraction action.

[0042] like Figure 2 and 5 As shown, each of the height extension components 3 includes a height transmission component 21, a support guide plate 26, and a vertically moving side plate 27. The height transmission component 21 is mounted on the width extension seat 18, and its driving end is drivenly connected to the vertically moving side plate 27. Its driven end is drivenly connected to the bidirectional drive device 11 via a linkage component 14. The height transmission component 21 converts the rotational power transmitted by the linkage component 14 into the vertical linear motion of the vertically moving side plate 27, thereby achieving height adjustment. Several support guide plates 26 are equidistantly arranged on the upper surface of the width extension seat 18 along the length direction of the conveying device 1. The vertically moving side plate 27 is provided with... Each support guide plate 26 has a sliding groove that is slidably engaged with the vertical moving side plate 27, forming a stable vertical guiding structure to ensure the vertical movement of the side plate during lifting. The bidirectional drive device 11 can drive the vertical moving side plate 27 to move vertically relative to the cargo vehicle body 6 along the height direction c of the transport device 1 through the linkage component 14 and the height transmission component 21. The sliding engagement between each support guide plate 26 and the vertical moving side plate 27 can guide the vertical movement of the vertical moving side plate 27 relative to the cargo vehicle body 6. The distributed arrangement of multiple sets of support guide plates 26 improves the stability of the movement and the anti-overturning ability of the vertical moving side plate 27.

[0043] like Figure 4 , 5 As shown in Figures 7 and 8, each of the height transmission components 21 includes at least two sets of coupling assemblies 22, a first follower wheel 23a, a second follower wheel 23b, a first vertical drive wheel 24a, a second vertical drive wheel 24b, a first vertical drive screw 25a, and a second vertical drive screw 25b; the two coupling assemblies 22 are respectively coaxially sleeved on the first rotating shaft 13a and the second rotating shaft 13b, and the ends of the two coupling assemblies 22 away from the load-bearing beam 9 pass through the side wall of the cargo vehicle body 6 and into the width extension seat 18. One end of the seat 18 is coaxially connected to the first follower wheel 23a and the second follower wheel 23b. The coupling assembly 22 serves as an intermediate component for power transmission, ensuring stable power transmission when the first rotating shaft 13a and the second rotating shaft 13b move laterally in the width extension seat 18. The first vertical drive wheel 24a and the second vertical drive wheel 24b are both rotatably mounted inside the width extension seat 18 and are respectively engaged with the first follower wheel 23a and the second follower wheel 23b. The first follower wheel 23a and the second follower wheel 23b are connected to the first vertical drive wheel 24b. Wheel 24a and the second vertical drive wheel 24b form a gear transmission pair, achieving speed and torque conversion through gear meshing; the first vertical drive screw 25a and the second vertical drive screw 25b are respectively coaxially mounted on the first vertical drive wheel 24a and the second vertical drive wheel 24b; the vertical moving side plate 27 has a threaded through hole on the side near the width extension seat 18, which is threaded to engage with the first vertical drive screw 25a and the second vertical drive screw 25b. b is simultaneously threadedly connected to the vertical moving side plate 27. The first vertical driving screw 25a and the second vertical driving screw 25b convert the rotational motion of the gear into the vertical linear motion of the vertical moving side plate 27 through the threaded engagement of the screw and the threaded through hole. The bidirectional driving device 11 can drive the first vertical driving screw 25a and the second vertical driving screw 25b to rotate synchronously through the first rotating shaft 13a and the second rotating shaft 13b. Through the symmetrical design of the gears and screws on both sides, the vertical moving side plate 27 is ensured to rise and fall synchronously, forming a horizontal support surface.

[0044] like Figures 7-10As shown, each of the coupling assemblies 22 includes a sleeve shaft 28, a clutch 29, and an adjusting shaft 30. The sleeve shaft 28 is coaxially sleeved on the first rotating shaft 13a or the second rotating shaft 13b, and both sleeve shafts 28 simultaneously slide in contact with the drive plate 19 and the housing of the cargo truck body 6. More specifically, the inner wall of the sleeve shaft 28 forms a key connection with the first rotating shaft 13a or the second rotating shaft 13b, allowing it to rotate with the rotating shaft and slide along the axial direction of the rotating shaft to accommodate the lateral movement of the width extension seat 18. The adjusting shaft 30 is coaxially positioned on the sleeve shaft 28 away from the load-bearing beam 9. The external end is connected to the first follower wheel 23a or the second follower wheel 23b; the clutch 29 is located between the sleeve shaft 28 and the adjusting shaft 30, and the clutch 29 can control the engagement or disengagement of the sleeve shaft 28 and the adjusting shaft 30. The clutch 29 is an electromagnetic clutch. The setting of the clutch 29 allows the power transmission of the height extension component 3 to be controlled independently. When it is necessary to adjust the width or height separately, the power is cut off or connected by disengaging or engaging the clutch 29; and the control lever 8 is provided with a control switch to control the opening and closing of the clutch 29.

[0045] In addition, a laser emitter is provided at the end of the vertical moving side plate 27 of any one height extension component 3 away from the width extension seat 18, and a laser receiver is provided at the end of the vertical moving side plate 27 of the other height extension component 3 away from the width extension seat 18. The laser receiver can control the clutch 29 to disconnect the power connection between the sleeve shaft 28 and the adjusting shaft 30 when the height is detected to be in place.

[0046] The coupling assembly 22 further includes a synchronous support plate 31 and a connecting sleeve 32. The synchronous support plate 31 is fixedly disposed within the width extension seat 18, and the connecting sleeve 32 is rotatably connected to the synchronous support plate 31. The adjusting shaft 30 is coaxially sleeved within the connecting sleeve 32. The first follower wheel 23a or the second follower wheel 23b is coaxially fixedly disposed at the end of the connecting sleeve 32 away from the synchronous support plate 31. The synchronous support plate 31 provides support for the connecting sleeve 32, ensuring the coaxiality of the adjusting shaft 30 and the first follower wheel 23a or the second follower wheel 23b, and avoiding abnormal transmission noise or wear due to eccentricity. The adjusting shaft 30, clutch 29, sleeve shaft 28, first follower wheel 23a, and second follower wheel 23b all move synchronously with the width extension seat 18 through the connecting sleeve 32 and the synchronous support plate 31. When the width extension seat 18 moves laterally, the synchronous support plate 31 and the connecting sleeve 32 move accordingly, and drive the sleeve shaft 28 to move axially relative to the first rotating shaft 13a or the second rotating shaft 13b, so as to ensure that the coupling assembly 22 moves synchronously with the width extension assembly 2 and maintain the continuity of the transmission chain.

[0047] The adjusting shaft 30 has several adjusting grooves 33 arranged in a circular array along its axial direction on its outer circumferential surface. The connecting sleeve 32 has several sliders 34 arranged in a circular array on its inner circumferential surface, which slide in cooperation with the adjusting grooves 33. The cooperation between the adjusting grooves 33 and the sliders 34 forms an axial sliding pair, allowing the adjusting shaft 30 to move axially within the connecting sleeve 32, while simultaneously transmitting torque through the groove walls. The sleeve shaft 28 has several guide bars 35 arranged in a circular array along its axial direction on its inner circumferential surface. The first rotating shaft 13a and the second rotating shaft 13b both have several guide grooves 36 arranged in a circular array on their circumferential surfaces, which slide in cooperation with the guide bars 35. The cooperation between the guide bars 35 and the guide grooves 36 forms a circumferential transmission pair, ensuring that the sleeve shaft 28 moves synchronously with the rotating shaft. The sleeve 28 is allowed to rotate while sliding along the axis of rotation. The sliding fit between the guide bar 35 and the guide groove 36 enables the sleeve 28 to rotate synchronously with the first rotating shaft 13a or the second rotating shaft 13b. The adjusting groove 33 and the slider 34 constitute a compensation structure. Since the clutch 29 will inevitably cause relative axial displacement between the sleeve 28 and the adjusting shaft 30 during the engagement or disengagement process of the sleeve 28 and the adjusting shaft 30, and the sleeve 28 is simultaneously in sliding fit with the drive plate 19 and the side wall of the truck body 6, there is an uncontrollable axial error during the sliding process. Therefore, it is necessary to design a compensation structure to achieve axial compensation while enabling the adjusting shaft 30 and the connecting sleeve 32 to rotate synchronously, so as to avoid transmission failure due to mechanical error.

[0048] Each clamping assembly 4 includes a clamping plate 5, a sliding seat 37, a connecting block 38, and a spring 39. The clamping plate 5 is located between the two vertically moving side plates 27. The two connecting blocks 38 are disposed between the clamping plate 5 and one vertically moving side plate 27. The two sliding seats 37 are slidably engaged on the side of the clamping plate 5 near the vertically moving side plate 27. One end of each connecting block 38 is symmetrically hinged to the side of the vertically moving side plate 27 near the clamping plate 5, and the other end is respectively hinged to the two sliding seats 37. The connecting blocks 38, clamping plate 5, sliding seats 37, and vertically moving side plate 27 form a four-bar linkage mechanism. When the vertically moving side plate 27 moves, the connecting blocks... The swing of 38 causes the sliding seat 37 to slide laterally on the clamping plate 5, thereby driving the clamping plate 5 to move closer to or away from the object; the two ends of the spring 39 are respectively connected to the sides of the two sliding seats 37 that are close to each other; a telescopic rod is coaxially arranged inside the spring 39, and the telescopic rod adopts a sleeve structure with a guide rod inside to limit the deformation direction of the spring 39, so that the spring 39 only extends and retracts along its own axis, avoiding the spring 39 from deflecting due to compression and thus losing clamping force; under the action of the spring 39, the two clamping plates 5 always tend to move closer to each other, the preload of the spring 39 provides the initial power for the clamping action, and the telescopic rod ensures the stability of the clamping force.

[0049] In addition, the sliding seat 37, the connecting block 38 and the spring 39 constitute a buffer structure. When encountering bumpy road sections during transportation, the buffer structure can buffer external impacts while ensuring that the items do not move, thus avoiding damage to the items caused by rigid collisions.

[0050] Since the first lead screw 12a and the second lead screw 12b will inevitably rotate as soon as the bidirectional drive device 11 is activated, the width extension components 2 will inevitably move away from each other. Therefore, the clamping component 4 needs to provide lateral support compensation, and thus the preload of the spring 39 needs to be set. The logic for setting the preload is as follows: when the width extension component 2 moves outward, the clamping plate 5 maintains the initial clamping of the item under the action of the spring 39, avoiding the item from loosening due to the extension action. In the embodiment described in this solution, it is set that when the width extension component 2 is in the maximum extension position, the clamping plate 5 still maintains an effective clamping force on the item; that is, when the sliding seat 37 is only acted upon by the spring 39, the distance between the clamping plate 5 and the vertical moving side plate 27 is greater than the adjustment range of the width extension component 2, ensuring that the clamping component 4 always has a reliable initial clamping capability throughout the entire width adjustment range, without the need for an additional power source.

[0051] In addition, pressure sensors are provided on the sides of the two clamping plates 5 that are close to each other, and a current sensor is provided inside the cargo vehicle body 6 to detect the load current of the bidirectional drive device 11, so as to avoid excessive contraction of the width extension component 2 during the clamping process, which would cause damage to the item. After the clamping plate 5 contacts the item, as the compression of the spring 39 increases, the load resistance of the drive device increases, and the current value rises accordingly. The pressure detected by the pressure sensor also increases. When the current value detected by the current sensor or the pressure value detected by the pressure sensor reaches the set threshold, the bidirectional drive device 11 is triggered to stop. At this time, the two clamping plates 5 clamp the item, ensuring that the item will not move. The combination of the pressure sensor and the current sensor constitutes a complementary detection scheme. If either of them is damaged, the other can still ensure that the width extension component 2 does not contract excessively during the clamping process. For example, if the pressure sensor is damaged, when the current sensor detects that the current of the bidirectional drive device 11 reaches the set threshold, the bidirectional drive device 11 is triggered to stop and a fault alarm is issued, prompting the staff to check the pressure sensor and the current sensor.

[0052] Rubber pads are attached to the side of the two clamping plates 5 that are close to each other. This not only improves the buffering capacity against external impacts, but also increases the friction between the clamping plates 5 and the object. Therefore, the pressure sensor needs to adopt a thin-film strain gauge structure and be attached to the side of the two clamping plates 5 that are close to each other. It can sense the changes in clamping force in real time and also ensure that there are no protruding areas on the clamping plates 5.

[0053] A method for moving items using a multi-dimensional adjustable handling platform includes the following steps:

[0054] S1: Expanding the storage space: The bidirectional drive device 11 is activated by the control system, which drives the two width expansion components 2 to move away from the transport device 1 synchronously along the width direction b. At the same time, the clutch 29 engages the sleeve shaft 28 and the adjusting shaft 30, so that the two height expansion components 3 move away from the transport device 1 synchronously along the height direction c. This forms an initial storage space that is larger than the external dimensions of the item to be transported, providing sufficient space for the item to be placed.

[0055] S2: Place the goods: Place the items to be transported in the initial accommodating space, with the two sides of the length direction a of the items aligned with the clamping plates 5 of the two clamping components 4 respectively; use the positioning marks on the cargo vehicle body 6 to assist the operator in accurately placing the items between the clamping plates 5 to ensure the symmetry of subsequent clamping actions.

[0056] S3: Shrink the containment space

[0057] The reverse drive bidirectional drive device 11 causes the two width extension components 2 to synchronously approach the transport device 1 along the width direction b, while maintaining the engagement state of the clutch 29, causing the two height extension components 3 to synchronously approach the transport device 1 along the height direction c, until the two clamping plates 5 respectively contact the two sides of the length direction a of the item; during the synchronous contraction process, the width and height are adjusted in conjunction to improve the adjustment efficiency, and when the two clamping plates 5 contact the item, the position of the item is initially fixed.

[0058] S4: Form a stable clamping grip

[0059] Continue driving the bidirectional drive device 11 to further retract the width extension component 2 and the height extension component 3. At this time, the spring 39 is compressed, the telescopic rod retracts axially, and the two clamping plates 5 generate elastic clamping force on the item. The control system determines whether the clamping force has reached the preset threshold based on the compression amount of the spring 39 or the load current of the bidirectional drive device 11. When the threshold is reached, the drive stops. At this time, the clamping plates 5 have sufficient clamping force on the item to prevent the item from shifting or shaking during transportation.

[0060] During this process, pressure sensors installed inside the clamping plate 5 continuously collect contact pressure data and transmit the signals to the control system. The control system analyzes and processes the pressure data using a preset algorithm model: if the pressure value does not reach the preset threshold, the system maintains the operation of the bidirectional drive device 11 and continues to shrink the accommodating space; if the pressure value reaches or exceeds the preset threshold, the system immediately sends a command to stop the driving action of the bidirectional drive device 11. At this time, the clamping plate 5 forms sufficient clamping force on the item, which can effectively prevent the item from shifting or shaking during transportation; the threshold is set according to the material, weight and other properties of the item to ensure that the clamping force meets the stability requirements while avoiding squeezing damage to the item.

[0061] In addition, the control system also monitors the load current of the bidirectional drive device 11 in real time through a current sensor. When the clamping plate 5 contacts the object, as the compression of the spring 39 increases, the load resistance of the drive device increases, and the current value rises accordingly. If the pressure sensor malfunctions or the signal is abnormal, the system will automatically switch to the current monitoring mode. When the current value reaches the preset overload threshold, a shutdown command will also be triggered.

[0062] In step S4, there is a discrimination process. Since the volume of the initial accommodating space mentioned in step S1 is greater than the volume of the item, that is, the height and width of the initial accommodating space are both greater than the height and width of the item, during the shrinking process, each of the width expansion components 2 and height expansion components 3 approaches the conveying device 1 at the same time. However, during the shrinking process, there may be a situation where the height direction adjustment is completed first (for example, the height of the item is less than the width). That is, during the shrinking process, when the height expansion component 3 reaches the appropriate height, the laser receiver cannot receive the laser emitted by the laser emitter. At this time, the laser receiver controls the clutch 29 to disconnect the power connection between the sleeve shaft 28 and the adjustment shaft 30, so that the height expansion component 3 stops moving, and only the width expansion component 2 continues to shrink, so as to meet the personalized adjustment needs of items of different sizes.

[0063] The above are the preferred embodiments described in this invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention.

Claims

1. A multi-dimensional adjustable transport platform, characterized in that: The device includes a conveying device (1), a width extension component (2), a height extension component (3), and a clamping component (4). Two width extension components (2) are installed on both sides of the conveying device (1) along the length direction a, and the two width extension components (2) can synchronously move closer to or away from the conveying device (1) along the width direction b. Two height extension components (3) are respectively installed on the upper surfaces of the two width extension components (2), and each height extension component (3) can move together with its corresponding width extension component (2), and the two height extension components (3) can synchronously move closer to or away from the conveying device (1) along the height direction c. 1) Each of the width extension components (2) and each of the height extension components (3) together constitute a dynamically adjustable accommodating space; the two clamping components (4) are installed on the side where the two height extension components (3) are close to each other, and each of the clamping devices (4) can move synchronously with its corresponding height extension component (3). When performing the handling operation, the two width extension components (2) expand laterally according to the outer dimensions of the item, and the two height extension components (3) dynamically adjust vertically according to the outer dimensions of the item to form a matching vertical support surface. The two clamping components (4) are firmly clamped on both sides of the length direction a of the item through symmetrical tightening action.

2. The multi-dimensional adjustable transport platform according to claim 1, characterized in that: The transport device (1) includes a cargo truck body (6). The internal space of the cargo truck body (6) is evenly divided into a first adjustment cavity (10a) and a second adjustment cavity (10b) by a load-bearing beam (9). A bidirectional drive device (11) is fixedly installed at the center of the load-bearing beam (9). The two drive shafts of the bidirectional drive device (11) are located in the first adjustment cavity (10a) and the second adjustment cavity (10b) respectively. A first lead screw (12a) and a second lead screw (12b) are coaxially arranged on the two drive shafts respectively. The two width extension components (2) are respectively connected to the first lead screw (12a) and the second lead screw (12b). The bidirectional drive device (11) can drive the two width extension components (2) to move synchronously along the width direction (b) of the transport device (1) through the first lead screw (12a) and the second lead screw (12b).

3. The multi-dimensional adjustable transport platform according to claim 2, characterized in that: The load-bearing beam (9) is rotatably fitted with a first rotating shaft (13a) and a second rotating shaft (13b), and the first rotating shaft (13a) and the second rotating shaft (13b) are symmetrically arranged with respect to the bidirectional drive device (11). The bidirectional drive device (11) drives the first rotating shaft (13a) and the second rotating shaft (13b) to rotate simultaneously through the linkage component (14). The two height extension components (3) are simultaneously connected to the first rotating shaft (13a) and the second rotating shaft (13b) for transmission. The bidirectional drive device (11) can drive the two height extension components (3) to move synchronously along the height direction c of the conveying device (1) through the first rotating shaft (13a) and the second rotating shaft (13b).

4. The multi-dimensional adjustable transport platform according to claim 3, characterized in that: The linkage assembly (14) includes at least one set of driving wheels (15), a first driven wheel (16a), a second driven wheel (16b), and a transmission chain (17). The driving wheels (15) are coaxially arranged on any one of the drive shafts of the bidirectional drive device (11). The first driven wheel (16a) is coaxially arranged on the first rotating shaft (13a), and the second driven wheel (16b) is coaxially arranged on the second rotating shaft (13b). The transmission chain (17) is simultaneously sleeved on the driving wheels (15), the first driven wheel (16a), and the second driven wheel (16b). The bidirectional drive device (11) can drive the first driven wheel (16a) and the second driven wheel (16b) to rotate synchronously through the driving wheels (15) and the transmission chain (17).

5. The multi-dimensional adjustable transport platform according to claim 1, characterized in that: Each of the width extension components (2) includes a width extension seat (18), a drive plate (19), and connecting posts (20). The width extension seats (18) are respectively disposed on one side of the conveying device (1) along the length direction a. The drive plate (19) is in the first adjustment cavity (10a) or the second adjustment cavity (10b) and is drivenly connected to the first lead screw (12a) or the second lead screw (12b). Both connecting posts (20) are located between the width extension seat (18) and the drive plate (19), and the two connecting posts (20) are opposite to each other. The bidirectional drive device (11) is symmetrically arranged. One end of each of the connecting columns (20) is fixedly connected to the drive plate (19), and the other end passes through the side wall of the cargo vehicle body (6) and is fixedly connected to the width extension seat (18). When the bidirectional drive device (11) drives the first lead screw (12a) and the second lead screw (12b) to rotate, the drive plate (19) can move horizontally relative to the cargo vehicle body (6) along the axis of the first lead screw (12a) or the second lead screw (12b) through the connecting columns (20) and the width extension seat (18).

6. The multi-dimensional adjustable transport platform according to claim 5, characterized in that: Each of the height extension components (3) includes a height transmission component (21), a support guide plate (26), and a vertical moving side plate (27). The height transmission component (21) is disposed on the width extension seat (18), and the driving end of the height transmission component (21) is drivenly connected to the vertical moving side plate (27), while the driven end is drivenly connected to the bidirectional drive device (11) through a linkage component (14). A plurality of the support guide plates (26) are equidistantly disposed on the width extension seat (18) along the length direction of the conveying device (1). 8) on the upper surface, and each of the support guide plates (26) is slidably engaged with the vertical moving side plate (27); the bidirectional drive device (11) can drive the vertical moving side plate (27) to move vertically relative to the cargo vehicle body (6) along the height direction (c) of the transport device (1) through the linkage component (14) and the height transmission component (21), and the sliding engagement of each of the support guide plates (26) with the vertical moving side plate (27) can guide the vertical movement of the vertical moving side plate (27) relative to the cargo vehicle body (6).

7. A multi-dimensional adjustable transport platform according to claim 6, characterized in that: Each of the height transmission components (21) includes at least two sets of coupling components (22), a first follower wheel (23a), a second follower wheel (23b), a first vertical drive wheel (24a), a second vertical drive wheel (24b), a first vertical drive screw (25a), and a second vertical drive screw (25b); the two coupling components (22) are respectively coaxially mounted on the first rotating shaft (13a) and the second rotating shaft (13b), and the ends of the two coupling components (22) away from the load-bearing beam (9) pass through the side wall of the cargo vehicle body (6) and into the width extension seat (18), and the ends of the two coupling components (22) in the width extension seat (18) are respectively coaxially connected to the first follower wheel (23a) and the second follower wheel (23b); the first vertical drive wheel (24a), the second vertical drive wheel (24b), the first vertical drive screw (25a), and the second vertical drive screw (25b) are respectively coaxially mounted on the first vertical drive wheel (23a) and the second vertical drive screw (23b); the first vertical drive wheel (24a), the second vertical drive wheel (24b), the third vertical drive wheel (25a), the second vertical drive screw (25b), the second vertical drive screw (25b), the second vertical drive screw (25b), the second vertical drive screw (24a ... A vertical drive wheel (24a) and a second vertical drive wheel (24b) are rotatably mounted in the width extension seat (18) and are respectively engaged with the first follower wheel (23a) and the second follower wheel (23b). The first vertical drive spool (25a) and the second vertical drive spool (25b) are respectively coaxially mounted on the first vertical drive wheel (24a) and the second vertical drive wheel (24b). The first vertical drive spool (25a) and the second vertical drive spool (25b) are simultaneously driven connected to the vertical moving side plate (27). The bidirectional drive device (11) can drive the first vertical drive spool (25a) and the second vertical drive spool (25b) to rotate synchronously through the first rotating shaft (13a) and the second rotating shaft (13b).

8. The multi-dimensional adjustable transport platform according to claim 7, characterized in that: Each of the aforementioned coupling assemblies (22) includes a sleeve shaft (28), a clutch (29), and an adjusting shaft (30); the sleeve shaft (28) is coaxially sleeved on the first rotating shaft (13a) or the second rotating shaft (13b), and both sleeve shafts (28) are simultaneously in sliding engagement with the drive plate (19) and the housing of the cargo truck body (6); the adjusting shaft (30) is coaxially disposed outside the end of the sleeve shaft (28) away from the load-bearing beam (9), and is drivenly connected to the first follower wheel (23a) or the second follower wheel (23b); the clutch (29) is disposed between the sleeve shaft (28) and the adjusting shaft (30), and the clutch (29) can control the engagement or disengagement of the sleeve shaft (28) and the adjusting shaft (30).

9. A multi-dimensional adjustable transport platform according to claim 8, characterized in that: The coupling assembly (22) further includes a synchronous support plate (31) and a connecting sleeve (32). The synchronous support plate (31) is fixedly disposed inside the width extension seat (18), and the connecting sleeve (32) is rotatably connected to the synchronous support plate (31). The adjusting shaft (30) is coaxially sleeved in the connecting sleeve (32). The first follower wheel (23a) or the second follower wheel (23b) is coaxially fixedly disposed at one end of the connecting sleeve (32) away from the synchronous support plate (31). The adjusting shaft (30), clutch (29), sleeve shaft (28), first follower wheel (23a) and second follower wheel (23b) all move synchronously with the width extension seat (18) through the connecting sleeve (32) and the synchronous support plate (31).

10. A multi-dimensional adjustable transport platform according to claim 9, characterized in that: The outer circumferential surface of the adjusting shaft (30) is provided with a plurality of adjusting grooves (33) arranged in a circular array along its own axial direction. The inner circumferential surface of the connecting sleeve (32) is provided with a plurality of sliders (34) that slide in cooperation with the adjusting grooves (33). The inner circumferential surface of the sleeve shaft (28) is provided with a plurality of guide bars (35) arranged in a circular array along its own axial direction. The circumferential surfaces of the first rotating shaft (13a) and the second rotating shaft (13b) are both provided with a plurality of guide grooves (36) that slide in cooperation with the guide bars (35). The sliding cooperation between the guide bars (35) and the guide grooves (36) enables the sleeve shaft (28) to always rotate synchronously with the first rotating shaft (13a) or the second rotating shaft (13b). The adjusting grooves (33) and the sliders (34) constitute a compensation structure.

11. A multi-dimensional adjustable transport platform according to claim 1, characterized in that: Each clamping component (4) includes a clamping plate (5), a sliding seat (37), a connecting block (38), and a spring (39). The clamping plate (5) is located between the two vertical moving side plates (27), and the two connecting blocks (38) are arranged between the clamping plate (5) and a vertical moving side plate (27). The two sliding seats (37) are slidably engaged on the side of the clamping plate (5) near the vertical moving side plate (27). One end of the two connecting blocks (38) is symmetrically hinged to the side of the vertical moving side plate (27) near the clamping plate (5), and the other end is respectively hinged to the two sliding seats (37). The two ends of the spring (39) are respectively connected to the side of the two sliding seats (37) that are close to each other. Under the action of the spring (39), the two clamping plates (5) always tend to move closer to each other, and when the width expansion component (2) is in the maximum expansion position, the clamping plate (5) still maintains an effective clamping force on the item.

12. The method for handling items using a multi-dimensional adjustable handling platform according to claim 11, characterized in that, Includes the following steps: S1: Expanding the accommodating space: By activating the bidirectional drive device (11) through the control system, the two width expansion components (2) are driven to move away from the transport device (1) synchronously along the width direction (b) of the transport device (1). At the same time, the clutch (29) engages the sleeve shaft (28) and the adjusting shaft (30) so that the two height expansion components (3) move away from the transport device (1) synchronously along the height direction (c) of the transport device (1), forming an initial accommodating space larger than the external dimensions of the item to be transported. S2: Place goods: Place the items to be transported in the initial accommodating space, with the length direction (a) of the items aligned with the clamping plates (5) of the two clamping components (4); S3: Shrink the accommodating space: reverse drive the bidirectional drive device (11) so that the two width extension components (2) move synchronously toward the transport device (1) along the width direction (b), while keeping the clutch (29) engaged, so that the two height extension components (3) move synchronously toward the transport device (1) along the height direction (c) until the two clamping plates (5) contact the two sides of the length direction (a) of the item respectively. S4: Form a stable clamping: Continue to drive the bidirectional drive device (11) to further contract the width extension component (2) and the height extension component (3). At this time, the spring (39) is compressed, so that the two clamping plates (5) generate an elastic clamping force on the item.

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