Unpowered holding and clamping equipment

Abstract

The utility model provides an unpowered clamping device. By means of the structure, the large-size single solid objects needing to be loaded and unloaded are simply protected and packaged, or the small-size single objects are stacked and packaged according to a certain shape, then the outer frame is arranged above the objects in a sleeved mode, then the objects can be lifted or moved in a short distance through any lifting equipment, and therefore the objects can be lifted or moved in a short distance through the lifting equipment. When the objects are carried, a bracket does not need to be installed at the bottoms of the objects, a packaging box with a carrying function does not need to be used for packaging the objects, meanwhile, the objects can be loaded, unloaded and stacked only by arranging simple lifting equipment without a clamping function at the loading and unloading site, and therefore the logistics transportation and logistics cost is reduced; the utility model belongs to the technical field of carrying equipment.

Description

Technical Field

[0001] This utility model belongs to the technical field of handling equipment, and in particular relates to a non-powered clamping device. Background Technology

[0002] In industrial production and construction, the handling of materials is unavoidable. Currently, the methods used are carrier-based loading and transportation, or carrierless loading via powered clamps. However, both methods have inherent limitations. First, with carrier-based loading, the cost of the carrier is either directly added to the goods and borne by the buyer, or the seller recycles and reuses it, but this still incurs turnover costs. Second, carrierless loading via powered clamps requires both loading and unloading sites to have powered clamping equipment to complete the loading, unloading, and secondary transfer of goods. Powered clamps have complex structures and require hydraulic, pneumatic, or electric devices to provide power to the clamps, making the equipment expensive and increasing handling costs. Utility Model Content

[0003] The purpose of this invention is to provide a non-powered clamping device to address the technical deficiencies described in the background section.

[0004] The non-powered clamping device includes:

[0005] The outer frame has at least two symmetrical inner clamping plates that can move closer together or open. The inner clamping plate on one side is connected to the first linkage rod by a bearing, and the inner clamping plate on the other side is connected to the second linkage rod by a bearing. The outer end shaft of the first linkage rod is connected to the outer end hinge of the second linkage rod by a pull shaft. The included angle opening formed by the hinge connection of the first linkage rod and the second linkage rod is set downward. A pull rod is also connected to the pull shaft by a bearing.

[0006] The lifting frame has a lifting lug on its top for quick connection with lifting equipment. The lifting frame can move above the outer frame and is equipped with slings that connect to tie rods.

[0007] When moving an object, the outer frame is placed on the object, with the inner clamps on both sides. Then, the lifting equipment can be used to lift the lifting frame through the lifting lugs. At this time, the slings pull the tie rod upward, and the tie rod pulls the hinge ends of the first and second linkage rods, causing the first and second linkage rods to pull all the inner clamps together, thereby clamping and lifting the object.

[0008] Based on the above technical solution, the present invention achieves the following beneficial effects:

[0009] The non-powered clamping device provided by this utility model only requires simple protective packaging for large single solid objects to be loaded and unloaded, or stacking and packing small single objects in a certain shape. Then, by inserting the outer frame over the object, the object can be lifted or moved short distances using any lifting equipment. Therefore, when handling these items, there is no need to install brackets at the bottom of the items, no need to use packing boxes with load-bearing functions to pack the items, and at the loading and unloading points, only simple lifting equipment without clamping functions is needed to load, unload and stack the items, thereby reducing logistics transportation and logistics costs.

[0010] To further optimize the above technical solutions, they can be combined with one or more of the following implementation methods without conflict.

[0011] In some implementations, the inner plate is fitted with a tough, wear-resistant rubber component for contact with the article to increase the friction between the inner plate and the article.

[0012] Based on the aforementioned technical solution, the present invention further achieves the following beneficial effects:

[0013] When the inner clamping plate clamps an item, it can effectively protect the item; in addition, it can increase the friction between the inner clamping plate 2 and the item, thereby enabling the inner clamping plate to clamp the item more stably.

[0014] In some embodiments, the outer wall bearing of the inner clamping plate is connected to the outer linkage rod, which is inclined upward and the outer end of the outer linkage rod is connected to the outer frame shaft.

[0015] Based on the aforementioned technical solution, the utility model further achieves the following beneficial effects:

[0016] 1. When the lifting equipment lifts the hoisting frame through the lifting lugs, the outer frame falls under its own weight, pushing the inner clamping plates together to generate an initial clamping force on the item and to adjust the relative position of the item by pushing it.

[0017] 2. After the item and the outer frame are off the ground, the outer frame applies a clamping force to the inner clamping plate through its own weight. At the same time, the inner clamping plate is hinged to the second linkage rod through the first linkage rod and is linked with the adjacent inner clamping plate to clamp the item. At this time, as the external lifting force increases, all the clamping force generated on the inner clamping plate is directed towards the center of the item, and the magnitude of the clamping force is adjusted by the weight of the item.

[0018] 3. When the inner plates come together, they can effectively prevent the situation of being caught in a void.

[0019] In some embodiments, the outer wall of the inner clamping plate is provided with a horizontal support beam, which is used to restrict the first linkage rod, the second linkage rod and the outer linkage rod from crossing the horizontal line when they move;

[0020] Based on the aforementioned technical solution, the present invention further achieves the following beneficial effects:

[0021] 1. During the process of the outer frame falling under its own weight and pushing the outer linkage rod to bring the inner clamping plates closer together, it can prevent the outer linkage rod from crossing the horizontal line and mistakenly pushing the inner clamping plates to open, thus making it impossible to clamp the items.

[0022] 2. When the inner clamps open to loosen their grip on the item, they can effectively prevent the first and second linkage rods from pushing the inner clamps together beyond the horizontal line, which would mistakenly clamp the item again and prevent it from being removed.

[0023] In some implementations, the outer frame has at least four inner clamping plates that are symmetrically arranged and correspond to the contact surface of the item;

[0024] Based on the aforementioned technical solution, the present invention further achieves the following beneficial effects:

[0025] When clamping an item, symmetrical clamping ensures even force distribution, resulting in a more stable clamp and preventing damage caused by uneven force.

[0026] In some implementations, when the outer frame falls and pushes the inner clamping plate inward, the outer frame pushes the outer linkage rod by its own weight. At this time, the horizontal angle α of the outer linkage rod is ≤45°.

[0027] Based on the aforementioned technical solution, the present invention further achieves the following beneficial effects:

[0028] 1. When the inner clamping plate clamps the item, the horizontal angle α of the outer linkage rod is 45°, which generates the maximum thrust on the inner clamping plate, thus enabling a more stable clamping of the item.

[0029] 2. The horizontal angle of the external linkage rod is limited to within 45°, which can effectively prevent the inner clamping plate from becoming stuck and making it difficult for the item to be released.

[0030] In some embodiments, the outer ends of the first and second linkage rods are each provided with a plurality of linkage rod adjustment holes for connection with the pull shaft bearing;

[0031] The outer frame includes a top support and lower beams located at the four corners of the top support. The four corners of the top support are provided with adjustment plates, and the adjustment plates are provided with several adjustment holes. The lower beams are provided with mounting screws that are fixed to any one of the adjustment holes. A telescopic support rod is provided between two adjacent lower beams. The telescopic support rod is provided with a locking mechanism for fixing the length. The outer end of the outer linkage rod is connected to the shaft of the lower beam.

[0032] Based on the aforementioned technical solution, the present invention can further achieve the following beneficial effects: it can adjust the size of the outer frame by adjusting the position of the lower beam to adjust the maximum distance between the inner clamping plates, thereby adapting to items of different sizes.

[0033] In some embodiments, the lifting frame is provided with a guide post, the guide post has an insertion hole, the outer frame is provided with a guide sleeve, the guide sleeve has an elastic pin, the guide post passes through the guide sleeve, and the elastic pin is used to slide on the guide post and can enter the insertion hole.

[0034] After the lifting equipment places the clamped item on the supporting plane, the item is restricted from descending by the inner clamping plate, while the lifting equipment continues to drive the lifting frame to descend. At this time, the guide post slides inside the guide sleeve until the elastic pin enters the insertion hole, locking the guide post and the guide sleeve. Subsequently, the lifting equipment lifts the lifting frame, which drives the outer frame to rise. The outer frame pulls the inner clamping plate outward through the outer linkage rod, thereby releasing the clamping of the item. At this time, the outer frame and the inner clamping plate are removed from the item and separated.

[0035] Based on the above technical solution, the present invention can further achieve the following beneficial effects:

[0036] 1. After the items are moved to the target location, the power of the lifting equipment can be used to drive the inner clamp to release the clamp on the items, so that during the unloading process, the clamp on the items is automatically released and the outer frame is removed from the items, thereby further improving the handling and stacking efficiency.

[0037] 2. There is no need to set a power source on the outer frame to drive the inner clamping plate to clamp the items, thereby further reducing the manufacturing cost of the equipment.

[0038] In some embodiments, the angle b between the outer linkage rod and the inner clamping plate is ≥ 50°, the angle between the first linkage rod on the inner clamping plate and the horizontal line is c, and the angle between the second linkage rod on the inner clamping plate and the horizontal line is d, where c and d = ≤ 30°.

[0039] Based on the aforementioned technical solution, the present invention further achieves the following beneficial effects:

[0040] 1. The included angle b between the outer linkage rod and the inner clamping plate is ≥50°, which can effectively prevent the inner clamping plate from locking up;

[0041] 2. When the item is raised, c and d = ≤30°, which can effectively ensure that the inner clamping plate generates the component force required to lift the item.

[0042] In some embodiments, when the item dimensions are 1200m*1200m*1200m, the weight is 3.1t, and the static friction coefficient with the inner clamping plate is 0.6~1.0, c, d = 26°, four inner clamping plates are provided inside the outer frame, and the contact area between a single inner clamping plate and the item is 4000cm². 2 ;

[0043] Based on the aforementioned technical solution, the present invention further achieves the following beneficial effects:

[0044] When the item is lifted, the clamping force coefficient of the inner clamping plate on the item is 1-26 / 90=0.711. This force coefficient is greater than the minimum static friction coefficient between the item and the inner clamping plate. Therefore, the clamping force generated is sufficient to hold the item. The pressure of the maximum clamping force on the item is 3.1*1000*10 / (4000*4)=1.9375Mpa, which is less than the minimum normal force on the item of 0.45=30*0.45=13.5Mpa. Therefore, it is safe and reliable to hold the item tightly with the inner clamping plate during lifting. Attached Figure Description

[0045] To more clearly illustrate the specific embodiments of this utility model, the following will briefly explain the drawings and reference numerals used in the description of the specific embodiments.

[0046] Figure 1 This is a schematic diagram of the structure of this utility model;

[0047] Figure 2 yes Figure 1 A magnified view of part Z shown;

[0048] Figure 3 This is the front view of this utility model;

[0049] Figure 4 This is a bottom view of the present invention;

[0050] Figure 5 This is a schematic diagram illustrating the force analysis when the present invention clamps and lifts an item.

[0051] Figure 6 This is a bottom view of the inner clamping plate described in this utility model;

[0052] Figure 7 This is a schematic diagram showing the position of the elastic pin described in this utility model.

[0053] Figure label:

[0054] 1. Outer frame; 11. Top bracket; 12. Adjustment plate; 13. Adjustment hole; 14. Mounting screw; 15. Lower beam; 16. Telescopic support rod; 17. Locking mechanism; 2. Inner clamping plate; 21. First linkage rod; 22. Second linkage rod; 23. Pull shaft; 24. Pull rod; 25. Tough and wear-resistant rubber parts; 26. Outer linkage rod; 27. Horizontal support beam; 28. Linkage rod adjustment hole; 3. Lifting frame; 31. Hanging lug; 32. Lifting sling; 4. Guide column; 41. Insertion hole; 42. Guide sleeve; 43. Elastic pin; 5. Item. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this utility model clearer, this specific embodiment will be described in further detail with reference to the accompanying drawings.

[0056] like Figures 1 to 7 As shown in the figure, this specific embodiment provides a non-powered clamping device, which includes:

[0057] The outer frame 1 has at least two symmetrical inner clamping plates 2 that can move closer together or open. The inner clamping plate 2 on one side is connected to the first linkage rod 21 by a bearing, and the inner clamping plate 2 on the other side is connected to the second linkage rod 22 by a bearing. The outer end shaft of the first linkage rod 21 is connected to the outer end hinge of the second linkage rod 22 through a pull shaft 23. The included angle formed by the hinge connection of the first linkage rod 21 and the second linkage rod 22 is set downward. A pull rod 24 is also connected to the pull shaft 23 by a bearing.

[0058] The lifting frame 3 has a lifting lug 31 on its top, which is used to quickly connect with the lifting equipment. The lifting frame 3 can move above the outer frame 1. The lifting frame 3 is equipped with a sling 32 that is connected to the tie rod 24.

[0059] When moving an object, the outer frame 1 is fitted onto the object, and the inner clamping plates 2 are located on both sides of the object. Then, the lifting equipment can be used to lift the lifting frame 3 through the lifting lugs 31. At this time, the sling 32 pulls the pull rod 24 to rise. The pull rod 24 pulls the hinge ends of the first linkage rod 21 and the second linkage rod 22, so that the first linkage rod 21 and the second linkage rod 22 pull all the inner clamping plates 2 together, thereby clamping the item 5 and lifting the item 5.

[0060] When the aforementioned non-powered clamping device is used, it is only necessary to provide simple protective packaging for single solid objects with large volumes that need to be loaded and unloaded, or to stack and pack single small objects in a certain shape. Then, by inserting the outer frame 1 over the object 5, the object can be lifted or moved short distances using any lifting equipment. Therefore, when handling these objects 5, there is no need to install brackets at the bottom of the objects 5, no need to use packing boxes with load-bearing functions to pack the objects 5, and at the loading and unloading sites, only simple lifting equipment without clamping functions is needed to load, unload and stack the objects 5, thereby reducing logistics transportation and logistics costs.

[0061] In some embodiments, the inner clamping plate 2 is fitted with a tough and wear-resistant rubber part 25 for contacting the article 5 to increase the friction between the inner clamping plate 2 and the article 5.

[0062] When the inner clamp 2 clamps the item 5, it can effectively protect the item 5; in addition, it can increase the friction between the inner clamp 2 and the item 5, so that the inner clamp 2 can clamp the item 5 more stably.

[0063] In some embodiments, the outer wall bearing of the inner clamping plate 2 is connected to the outer linkage rod 26, the outer linkage rod 26 is inclined upward, and the outer end of the outer linkage rod 26 is shaft-connected to the outer frame 1.

[0064] When the lifting equipment lifts the lifting frame 3 through the lifting lug 31, the outer frame 1 falls under its own weight, pushing the inner clamping plates 2 to move closer together, so as to generate an initial clamping force on the item 5 and push the item 5 to adjust its relative position.

[0065] After the item 5 and the outer frame 1 are lifted off the ground, the outer frame 1 exerts a clamping force on the inner clamping plate 2 through its own weight. At the same time, the inner clamping plate 2 is hinged to the second linkage rod 22 via the first linkage rod 21, thus clamping the item 5. At this time, as the applied lifting force increases, all the clamping components generated on the inner clamping plate 2 are directed towards the center of the item 5, and the magnitude of the clamping force is adjusted by the weight of the item 5. In addition, when the inner clamping plates 2 come together, the situation of clamping without clamping the item is effectively avoided.

[0066] In some embodiments, the outer wall of the inner clamping plate 2 is provided with a horizontal support beam 27, which is used to restrict the first linkage rod 21, the second linkage rod 22 and the outer linkage rod 26 from crossing the horizontal line when they move.

[0067] During the process of the outer frame 1 falling under its own weight and pushing the outer linkage rod 26 to bring the inner clamping plates 2 closer together, it can prevent the outer linkage rod 26 from crossing the horizontal line and mistakenly pushing the inner clamping plates 2 to open up, thus making it impossible to clamp the item 5.

[0068] When the inner clamping plates 2 open to loosen their grip on the item 5, it can effectively prevent the first linkage rod 21 and the second linkage rod 22 from pushing across the horizontal line and causing the inner clamping plates 2 to move closer together, thus mistakenly clamping the item 5 again and making it impossible to remove the item 5.

[0069] In some embodiments, the outer frame 1 has at least four inner clamping plates 2 that are consistent with and symmetrically arranged with the contact surface of the item 5.

[0070] When clamping item 5, the symmetrical clamping of item 5 ensures that the force on item 5 is even, thus clamping item 5 more stably. At the same time, it can also prevent item 5 from being damaged due to uneven force.

[0071] In some embodiments, when the outer frame 1 falls and pushes the inner clamping plate 2 inward, the outer frame 1 pushes the outer linkage rod 26 by its own weight. At this time, the horizontal included angle a of the outer linkage rod 26 is ≤45°.

[0072] During the clamping process of the inner clamping plate 2 on the item 5, when the horizontal angle α of the outer linkage rod 26 is 45°, the maximum force can be generated on the inner clamping plate 2, thus enabling a more stable clamping of the item 5. In addition, the horizontal angle of the outer linkage rod 26 is limited to within 45°, which can effectively prevent the inner clamping plate 2 from becoming stuck and making it difficult for the item 5 to be released.

[0073] In some embodiments, the outer ends of the first linkage rod 21 and the second linkage rod 22 are each provided with a plurality of linkage rod adjustment holes 28 for connecting with the bearing of the pull shaft 23; by adjusting the hinge point between the first linkage rod 21 and the second linkage rod 22, the maximum distance between the two inner clamping plates 2 can be adjusted to accommodate items 5 of different sizes.

[0074] In addition, the outer frame 1 includes a top support 11 and lower beams 15 located at the four corners of the top support 11. Adjustment plates 12 are provided at the four corners of the top support 11, and each adjustment plate 12 has several adjustment holes 13. The lower beams 15 are provided with mounting screws 14 fixed to any one of the adjustment holes 13. The outer end of the outer linkage rod 26 is axially connected to the lower beam 15. The mounting screws 14 on the lower beams 15 can be locked into the adjustment holes 13 at different positions, thereby adjusting the lower beams 15 to different positions to provide a fulcrum for the inner clamping plate 2 after adjustment. A telescopic support rod 16 is provided between two adjacent lower beams 15, and the telescopic support rod 16 is provided with a locking mechanism 17 for fixing its length, thereby strengthening the load-bearing capacity of the lower beams 15 after adjustment.

[0075] In some embodiments, the lifting frame 3 is provided with a guide post 4, the guide post 4 is provided with an insertion hole 41, the outer frame 1 is provided with a guide sleeve 42, the guide sleeve 42 is provided with an elastic pin 43, the guide post 4 passes through the guide sleeve 42, and the elastic pin 43 is used to slide on the guide post 4 and can enter the insertion hole 41.

[0076] After the lifting equipment places the clamped item 5 on the supporting plane, the item 5 is restricted from descending by the inner clamping plate 2, while the lifting equipment continues to drive the lifting frame 3 to descend. At this time, the guide post 4 slides in the guide sleeve 42 until the elastic pin 43 enters the insertion hole 41, so that the guide post 4 and the guide sleeve 42 are locked. Then, the lifting equipment lifts the lifting frame 3, and the lifting frame 3 drives the outer frame 1 to rise. The outer frame 1 pulls the inner clamping plate 2 outward through the outer linkage rod 26, thereby releasing the clamping of the item 5. At this time, the outer frame 1 and the inner clamping plate 2 are removed from the item 5 and separated.

[0077] After the item 5 is moved to the target location, the power of the lifting equipment can be used to drive the inner clamp 2 to release the clamp on the item 5, so that the clamp on the item 5 is automatically released during the unloading process, and the outer frame 1 is removed from the item 5, thereby further improving the handling and stacking efficiency.

[0078] There is no need to set a power source on the outer frame 1 to drive the inner clamping plate 2 to solve the clamping problem of the item 5, thereby further reducing the manufacturing cost of the equipment.

[0079] In some embodiments, the angle b between the outer linkage rod 26 and the inner clamping plate 2 is ≥ 50°, the angle c between the first linkage rod 21 located on the inner clamping plate 2 and the horizontal line is , and the angle d between the second linkage rod 22 located on the inner clamping plate 2 and the horizontal line is ≤ 30°.

[0080] The included angle b between the outer linkage rod 26 and the inner clamping plate 2 is ≥50°, which can effectively prevent the inner clamping plate 2 from locking up; in addition, when the item 5 is lifted, c and d = ≤30°, which can effectively ensure that the inner clamping plate 2 generates a component force that is sufficient to lift the item 5.

[0081] In some embodiments, when the dimensions of the item 5 are 1200m*1200m*1200m, its weight is 3.1t, and the static friction coefficient between the item 5 and the inner clamping plate 2 is 0.6 to 1.0, c and d = 26°, and four inner clamping plates 2 are provided inside the outer frame 1, with each inner clamping plate 2 having a contact area of ​​4000cm² with the item 5. 2 .

[0082] When item 5 is lifted, the clamping force coefficient of the inner clamping plate 2 on item 5 is 1-26 / 90=0.711. This force coefficient is greater than the minimum static friction coefficient between item 5 and inner clamping plate 2. Therefore, the clamping force generated is sufficient to hold item 5. The pressure of the maximum clamping force on item 5 is 3.1*1000*10 / (4000*4)=1.9375Mpa. The result is less than the minimum normal force value of item 5, which is 0.45=30*0.45=13.5Mpa. Therefore, it is safe and reliable for item 5 to be held tightly by inner clamping plate 2 and lifted.

[0083] To further illustrate the optical testing equipment for mobile phone lenses described in this specific embodiment, the following examples are provided.

[0084] Example 1

[0085] This embodiment provides a non-powered clamping device, which includes an outer frame 1 and a lifting frame 3.

[0086] The outer frame 1 has two symmetrical inner clamping plates 2 that can move closer together or open. The inner clamping plates 2 are fitted with tough and wear-resistant rubber parts 25 for contact with the item 5 to increase the friction between the inner clamping plates 2 and the item 5. The inner clamping plate 2 on one side is bearing connected to the first linkage rod 21, and the inner clamping plate 2 on the other side is bearing connected to the second linkage rod 22. The outer end shaft of the first linkage rod 21 is hinged to the outer end of the second linkage rod 22 through the pull shaft 23. The included angle formed by the hinge connection of the first linkage rod 21 and the second linkage rod 22 is set downward. The pull shaft 23 is also bearing connected to the pull rod 24.

[0087] The lifting frame 3 has a lifting lug 31 on its top, which is used to quickly connect with the lifting equipment. The lifting frame 3 can move above the outer frame 1. The lifting frame 3 is equipped with a sling 32 that is connected to the tie rod 24.

[0088] The following is an instruction manual for using the non-powered clamping device described in this embodiment.

[0089] When moving an object, the outer frame 1 is fitted onto the object, and the inner clamping plates 2 are located on both sides of the object. Then, the lifting equipment can be used to lift the lifting frame 3 through the lifting lugs 31. At this time, the sling 32 pulls the pull rod 24 to rise. The pull rod 24 pulls the hinge ends of the first linkage rod 21 and the second linkage rod 22, so that the first linkage rod 21 and the second linkage rod 22 pull all the inner clamping plates 2 together, thereby clamping the item 5 and lifting the item 5.

[0090] After the object is moved to the destination, the two inner clamping plates 2 are opened by human power or other mechanical power source, thereby releasing the clamping on the object 5. Then, the lifting equipment lifts the lifting frame 3 through the lifting lug 31. The lifting frame 3 drives the outer frame 1 and the inner clamping plates 2 to be taken out from above the object 5 and separated from the object 5.

[0091] Example 2

[0092] This embodiment provides a non-powered clamping device, which includes an outer frame 1 and a lifting frame 3.

[0093] The outer frame 1 is provided with a guide sleeve 42, and the guide sleeve 42 is provided with a flexible pin 43.

[0094] The outer frame 1 has two symmetrically arranged inner clamping plates 2 that can move closer together or open. The inner clamping plates 2 are fitted with tough, wear-resistant rubber parts 25 for contact with the item 5 to increase friction. One inner clamping plate 2 is bearing-connected to a first linkage rod 21, and the other inner clamping plate 2 is bearing-connected to a second linkage rod 22. The outer end of the first linkage rod 21 is hinged to the outer end of the second linkage rod 22 via a pull shaft 23. The included angle formed by the hinges of the first and second linkage rods 21 faces downwards. A pull rod 24 is also bearing-connected to the pull shaft 23. The outer wall of the inner clamping plates 2 is bearing-connected to an outer linkage rod 26, which is inclined upwards and whose outer end is shaft-connected to the outer frame 1. The outer wall of the inner clamping plates 2 is provided with a horizontal support beam 27, which restricts the first linkage rod 21, the second linkage rod 22, and the outer linkage rod 26 from crossing the horizontal line during movement.

[0095] The top of the lifting frame 3 is provided with a lifting lug 31, which is used for quick connection with lifting equipment. The lifting frame 3 can move above the outer frame 1. The lifting frame 3 is provided with a sling 32 connected to the tie rod 24. The lifting frame 3 is provided with a guide post 4, which has a socket 41. The guide post 4 passes through a guide sleeve 42, and an elastic pin 43 is used to slide on the guide post 4 and can enter the socket 41.

[0096] The following is an instruction manual for using the non-powered clamping device in this embodiment.

[0097] When moving an object, the outer frame 1 is fitted onto the object, with the inner clamping plates 2 positioned on either side of the object. Then, the elastic pin 43 is moved away from the insertion hole 41, allowing the guide post 4 to slide within the guide sleeve 42. At this point, the outer frame 1 falls under its own weight, pushing the inner clamping plates 2 closer together to generate an initial clamping force on the item 5 and adjusting its relative position. Subsequently, the lifting equipment lifts the lifting frame 3 via the lifting lug 31, and the sling 32 pulls the tie rod 24 upwards. The tie rod 24 pulls the hinge ends of the first linkage rod 21 and the second linkage rod 22, causing the first linkage rod 21 to... The moving rod 21 and the second linkage rod 22 pull all the inner clamping plates 2 together, thereby clamping and lifting the item 5. After the item 5 and the outer frame 1 are off the ground, the outer frame 1 applies a clamping force to the inner clamping plates 2 through its own weight. At the same time, the inner clamping plates 2 are hinged to the first linkage rod 21 and the second linkage rod 22 and are linked with the adjacent inner clamping plate 2 to clamp the item 5. As the external lifting force increases, all the clamping components generated on the inner clamping plates 2 are directed towards the parallel centerline of the item 5, and the magnitude of the clamping force is adjusted by the weight of the item 5.

[0098] After the object is transported to its destination, the lifting equipment places the clamped item 5 onto the supporting plane. The item 5 is restricted from descending by the inner clamping plate 2, while the lifting equipment continues to lower the lifting frame 3. At this time, the guide post 4 slides within the guide sleeve 42 until the elastic pin 43 enters the insertion hole 41, locking the guide post 4 with the guide sleeve 42. Afterward, the lifting equipment lifts the lifting frame 3, which in turn raises the outer frame 1. The outer frame 1 pulls the inner clamping plate 2 outward through the outer linkage rod 26, thereby releasing the clamp on the item 5. Afterward, the lifting equipment lifts the lifting frame 3, allowing the item 5 to be removed and separated.

[0099] Example 3

[0100] This embodiment provides a non-powered clamping device, which includes an outer frame 1 and a lifting frame 3.

[0101] The outer frame 1 is provided with a guide sleeve 42, and the guide sleeve 42 is provided with a flexible pin 43.

[0102] The outer frame 1 contains at least four symmetrically arranged inner clamping plates 2, each with a contact surface consistent with that of the item 5. Each inner clamping plate 2 is fitted with a tough, wear-resistant rubber component 25 to increase friction between the inner clamping plate 2 and the item 5. One inner clamping plate 2 is bearing-connected to a first linkage rod 21, while the other inner clamping plate 2 is bearing-connected to a second linkage rod 22. The outer end of the first linkage rod 21 is hinged to the outer end of the second linkage rod 22 via a pull shaft 23. The angle formed by the hinges of the first and second linkage rods 21 faces downwards. A pull rod 24 is also bearing-connected to the pull shaft 23. An outer linkage rod 26 is bearing-connected to the outer wall of the inner clamping plate 2. The outer linkage rod 26 is inclined upwards, and its outer end is shaft-connected to the outer frame 1. A horizontal support beam 27 is provided on the outer wall of the inner clamping plate 2. This horizontal support beam 27 restricts the first linkage rod 21, the second linkage rod 22, and the outer linkage rod 26 from crossing the horizontal line during movement.

[0103] Furthermore, the outer ends of the first linkage rod 21 and the second linkage rod 22 are each provided with several linkage rod adjustment holes 28 for connection with the bearing of the pull shaft 23. By adjusting the hinge point between the first linkage rod 21 and the second linkage rod 22, the maximum distance between the two inner clamping plates 2 can be adjusted to accommodate items 5 of different sizes. In addition, the outer frame 1 includes a top support 11 and lower beams 15 located at the four corners of the top support 11. Adjustment plates 12 are provided at the four corners of the top support 11, and the adjustment plates 12 are provided with several adjustment holes 13. The lower beam 15 is provided with mounting screws 14 fixed to any one of the adjustment holes 13. The outer end of the outer linkage rod 26 is axially connected to the lower beam 15. The mounting screws 14 on the lower beam 15 are locked into the adjustment holes 13 at different positions, thereby adjusting the lower beam 15 to different positions to provide a fulcrum for the inner clamping plates 2 after adjustment. A telescopic support rod 16 is provided between two adjacent lower beams 15. The telescopic support rod 16 is equipped with a locking mechanism 17 for fixing the length, which strengthens the load on the lower beam 15 after the position is adjusted.

[0104] The top of the lifting frame 3 is provided with a lifting lug 31, which is used for quick connection with lifting equipment. The lifting frame 3 can move above the outer frame 1. The lifting frame 3 is provided with a sling 32 connected to the tie rod 24. The lifting frame 3 is provided with a guide post 4, which has a socket 41. The guide post 4 passes through a guide sleeve 42, and an elastic pin 43 is used to slide on the guide post 4 and can enter the socket 41.

[0105] The following is an instruction manual for using the non-powered clamping device in this embodiment.

[0106] When moving an object, the outer frame 1 is fitted onto the object, with the inner clamping plates 2 positioned on either side of the object. Then, the elastic pin 43 is moved away from the insertion hole 41, allowing the guide post 4 to slide within the guide sleeve 42. At this point, the outer frame 1 falls under its own weight, pushing the inner clamping plates 2 closer together to generate an initial clamping force on the item 5 and adjusting its relative position. Subsequently, the lifting equipment lifts the lifting frame 3 via the lifting lug 31, and the sling 32 pulls the tie rod 24 upwards. The tie rod 24 pulls the hinge ends of the first linkage rod 21 and the second linkage rod 22, causing the first... The linkage rod 21 and the second linkage rod 22 pull all the inner clamping plates 2 together, thereby clamping and lifting the item 5. After the item 5 and the outer frame 1 are off the ground, the outer frame 1 applies a clamping force to the inner clamping plates 2 through its own weight. At the same time, the inner clamping plates 2 are hinged to the first linkage rod 21 and the second linkage rod 22 and are linked with the adjacent inner clamping plate 2 to clamp the item 5. As the external lifting force increases, all the clamping force generated on the inner clamping plates 2 are directed towards the center of the item 5, and the magnitude of the clamping force is adjusted by the weight of the item 5.

[0107] After the object is transported to its destination, the lifting equipment places the clamped item 5 onto the supporting plane. The item 5 is restricted from descending by the inner clamping plate 2, while the lifting equipment continues to lower the lifting frame 3. At this time, the guide post 4 slides within the guide sleeve 42 until the elastic pin 43 enters the insertion hole 41, locking the guide post 4 with the guide sleeve 42. Afterward, the lifting equipment lifts the lifting frame 3, which in turn raises the outer frame 1. The outer frame 1 pulls the inner clamping plate 2 outward through the outer linkage rod 26, thereby releasing the clamp on the item 5. Afterward, the lifting equipment lifts the lifting frame 3, allowing the item 5 to be removed and separated.

[0108] Example 4

[0109] This embodiment provides a non-powered clamping device, which includes the technical features described in embodiment 2 or 3, and also includes the following technical features.

[0110] When the outer frame 1 falls and pushes the inner clamping plate 2 inward, the outer frame 1 pushes the outer linkage rod 26 by its own weight. At this time, the horizontal angle α of the outer linkage rod 26 is ≤ 45°.

[0111] The angle b between the outer linkage rod 26 and the inner clamping plate 2 is ≥ 50°. The angle c between the first linkage rod 21 located on the inner clamping plate 2 and the horizontal line is , and the angle d between the second linkage rod 22 located on the inner clamping plate 2 and the horizontal line is ≤ 30°.

[0112] Example 5

[0113] This embodiment provides a non-powered clamping device, which includes the technical features of embodiment 3, and also includes the following technical features.

[0114] When the outer frame 1 falls and pushes the inner clamping plate 2 inward, the outer frame 1 pushes the outer linkage rod 26 by its own weight. At this time, the horizontal angle α of the outer linkage rod 26 is ≤ 45°.

[0115] The angle b between the outer linkage rod 26 and the inner clamping plate 2 is ≥ 50°, the angle c between the first linkage rod 21 located on the inner clamping plate 2 and the horizontal line is , and the angle d between the second linkage rod 22 located on the inner clamping plate 2 and the horizontal line is .

[0116] The item is a C30 concrete paving brick. Item 5 has dimensions of 1200m x 1200m x 1200m, weighs 3.1t, and has a static friction coefficient of 0.6–1.0 with the inner clamping plate 2. The angles c and d are 26°. The outer frame 1 contains four inner clamping plates 2, and the contact area between each inner clamping plate 2 and item 5 is 4000 cm². 2 .

[0117] During lifting, the clamping force coefficient of the inner clamping plate 2 on the item 5 is 1-26 / 90=0.711. This force coefficient is greater than the minimum static friction coefficient between the item 5 and the inner clamping plate 2. Therefore, the clamping force generated is sufficient to lift the item 5. The pressure of the maximum clamping force on the item 5 is 3.1*1000*10 / (4000*4)=1.9375Mpa, which is less than the minimum normal force value of the item 5, 0.45=30*0.45=13.5Mpa.

Claims

1. A non-powered clamping device, characterized in that, include: The outer frame (1) has at least two symmetrical inner clamping plates (2) that can move closer together or open. The inner clamping plate (2) on one side is connected to the first linkage rod (21) by a bearing, and the inner clamping plate (2) on the other side is connected to the second linkage rod (22) by a bearing. The outer end shaft of the first linkage rod (21) is connected to the outer end of the second linkage rod (22) by a hinge through a pull shaft (23). The included angle opening formed by the hinge connection between the first linkage rod (21) and the second linkage rod (22) is set downward. A pull rod (24) is also connected to the pull shaft (23) by a bearing. The lifting frame (3) is provided with a hanging ear (31) on its top. The hanging ear (31) is used to quickly connect with the lifting equipment. The lifting frame (3) can move above the outer frame (1). The lifting frame (3) is provided with a sling (32) connected to the tie rod (24). When moving an object, the outer frame (1) is fitted onto the object, and the inner clamping plates (2) are located on both sides of the object. Then, the lifting equipment can be used to lift the lifting frame (3) through the lifting lugs (31). At this time, the sling (32) pulls the pull rod (24) to rise. The pull rod (24) pulls the hinge ends of the first linkage rod (21) and the second linkage rod (22), so that the first linkage rod (21) and the second linkage rod (22) pull all the inner clamping plates (2) together, thereby clamping the item (5) and lifting the item (5).

2. The non-powered clamping device according to claim 1, characterized in that: The inner clamping plate (2) is equipped with a tough and wear-resistant rubber part (25) for contacting the article (5) to increase the friction between the inner clamping plate (2) and the article (5).

3. The non-powered clamping device according to claim 1, characterized in that: The outer wall bearing of the inner clamping plate (2) is connected to the outer linkage rod (26), the outer linkage rod (26) is inclined upward, and the outer end of the outer linkage rod (26) is connected to the shaft of the outer frame (1); When the lifting equipment lifts the lifting frame (3) through the lifting lug (31), the outer frame (1) falls by its own weight and pushes the inner clamping plates (2) together to generate an initial clamping force on the item (5) and push the item (5) to adjust its relative position; After the item (5) and the outer frame (1) are lifted off the ground, the outer frame (1) applies a clamping force to the inner clamping plate (2) through its own weight. At the same time, the inner clamping plate (2) is hinged to the second linkage rod (22) through the first linkage rod (21) and is linked with the adjacent inner clamping plate (2) to clamp the item (5). As the externally applied lifting force increases, all the clamping force generated on the inner clamping plate (2) is directed towards the center of the item (5), and the magnitude of the clamping force is adjusted by the weight of the item (5).

4. The non-powered clamping device according to claim 3, characterized in that: The outer wall of the inner clamping plate (2) is provided with a horizontal support beam (27), which is used to restrict the first linkage rod (21), the second linkage rod (22) and the outer linkage rod (26) from crossing the horizontal line when they move.

5. The non-powered clamping device according to claim 3, characterized in that: The outer frame (1) has at least four inner clamping plates (2) that are consistent with and symmetrically arranged with the contact surface of the item (5).

6. The non-powered clamping device according to claim 3, characterized in that: When the outer frame (1) falls and pushes the inner clamping plate (2) to move inward, the outer frame (1) pushes the outer linkage rod (26) by its own weight. At this time, the horizontal angle a of the outer linkage rod (26) is ≤45°.

7. The non-powered clamping device according to claim 3, characterized in that: The outer ends of the first linkage rod (21) and the second linkage rod (22) are each provided with a plurality of linkage rod adjustment holes (28) for connecting with the bearing of the pull shaft (23); The outer frame (1) includes a top support (11) and lower beams (15) located at the four corners of the top support (11). The four corners of the top support (11) are provided with adjustment plates (12). The adjustment plates (12) are provided with a plurality of adjustment holes (13). The lower beams (15) are provided with mounting screws (14) fixed to any one of the adjustment holes (13). A telescopic support rod (16) is provided between two adjacent lower beams (15). The telescopic support rod (16) is provided with a locking mechanism (17) for fixing the length. The outer end of the outer linkage rod (26) is axially connected to the lower beams (15).

8. The non-powered clamping device according to claim 3, characterized in that: The lifting frame (3) is provided with a guide post (4), the guide post (4) is provided with a socket (41), the outer frame (1) is provided with a guide sleeve (42), the guide sleeve (42) is provided with an elastic pin (43), the guide post (4) passes through the guide sleeve (42), and the elastic pin (43) is used to slide on the guide post (4) and can enter the socket (41); After the lifting equipment places the clamped item (5) on the support plane, the item (5) restricts the outer frame (1) from descending through the inner clamp plate (2), while the lifting equipment continues to drive the lifting frame (3) to descend. At this time, the guide post (4) slides inside the guide sleeve (42) until the elastic pin (43) enters the insertion hole (41), so that the guide post (4) locks with the guide sleeve (42). Subsequently, the lifting equipment lifts the lifting frame (3), and the lifting frame (3) drives the outer frame (1) to rise. The outer frame (1) pulls the inner clamp plate (2) outward through the outer linkage rod (26), thereby releasing the clamp on the item (5). At this time, the outer frame (1) and the inner clamp plate (2) are removed from the item (5) and separated.

9. The non-powered clamping device according to claim 3, characterized in that: The angle b between the outer linkage rod (26) and the inner clamping plate (2) is ≥50°, the angle between the first linkage rod (21) on the inner clamping plate (2) and the horizontal line is c, and the angle between the second linkage rod (22) on the inner clamping plate (2) and the horizontal line is d, where c and d are ≤30°.

10. A non-powered clamping device according to claim 9, characterized in that: When the item (5) has dimensions of 1200m*1200m*1200m and a weight of 3.1t, and the static friction coefficient with the inner clamping plate (2) is 0.6~1.0, then c and d = 26°. The outer frame (1) has four inner clamping plates (2), and the contact area between a single inner clamping plate (2) and the item (5) is 4000cm². 2 ; During lifting, the clamping force coefficient of the inner clamping plate (2) on the item (5) is 1-26 / 90=0.

711. This force coefficient is greater than the minimum static friction coefficient between the item (5) and the inner clamping plate (2). The clamping force generated is sufficient to lift the item (5). The pressure of the maximum clamping force on the item (5) is 3.1*1000*10 / (4000*4)=1.9375Mpa, which is less than the minimum normal force value of the item (5) 0.45=30*0.45=13.5Mpa.

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