Sheet metal hoisting and clamping mechanism

Abstract

The utility model relates to a sheet metal hoisting and clamping mechanism, which belongs to the technical field of sheet metal hoisting and clamping, and comprises a hoisting ring and two connecting plates arranged in parallel, the hoisting ring is arranged between the two connecting plates in a manner of sliding up and down within a preset range, an opening is arranged below each connecting plate and is used for placing a to-be-clamped metal plate, and the opening is communicated with the hoisting ring. A clamping structure is arranged between the two connecting plates; the clamping structure comprises a friction block and an overturning block which are located on the two sides of the opening. According to the metal plate hoisting and clamping mechanism, the overturning block can be driven to overturn only by pulling the hoisting ring to move up and down, so that the overturning block can abut against and fix a metal plate to the friction block, and the overturning block and the friction block are matched to clamp and fix the metal plate; the metal plate can be clamped and fixed without using a power supply or hydraulic pressure as a driving source, so that the hoisting cost of the metal plate can be effectively reduced, and the environmental protection coefficient is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting and clamping of metal plates, in particular to a lifting and clamping mechanism for metal plates. Background Art

[0002] Sheet metal refers to flat, rectangular plates made by forging, rolling, or casting. There are many types of sheet metal, which can be categorized by thickness into thin, medium, thick, and extra-thick plates. With the development of industry, sheet metal is widely used in the manufacture of specialized vehicle bodies. During the production process, sheet metal is moved between different workstations, requiring the use of lifting and gripping mechanisms.

[0003] A Chinese patent (publication number: CN 217808327 U) discloses a lifting fixture for metal processing. The hydraulic telescopic member can control the stable movement of the adjustment plate, thereby controlling the stable cooperation of the arc-shaped clamping plate or the clamping frame to perform the clamping operation. The above patent uses the hydraulic telescopic member as a driving source to control the clamping plate to work, resulting in high metal plate lifting costs and poor environmental performance. Based on this, the present application proposes a metal plate lifting and clamping mechanism to solve the above problems. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a metal plate lifting and clamping mechanism, which has the advantages of easy use and low cost. It solves the problem that the existing technology uses hydraulic telescopic parts as the driving source to control the clamping plate to work, resulting in high metal plate lifting costs and poor environmental protection.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a metal plate lifting and clamping mechanism, comprising a lifting ring and two parallel connecting plates, wherein the lifting ring is arranged between the two connecting plates and slides up and down within a preset range, and an opening is provided below each of the two connecting plates for placing the metal plate to be clamped, and a clamping structure is provided between the two connecting plates;

[0006] The clamping structure includes a friction block fixed to one side opposite to the two connecting plates, and a flip block rotatably connected between the two connecting plates via a first pin shaft, wherein the friction block and the flip block are respectively located on both sides of the opening; the clamping structure also includes two pull plates located on both sides of the flip block, wherein one end of the two pull plates is rotatably connected to the flip block via a second pin shaft, and the other end is rotatably connected to the lifting ring via a third pin shaft;

[0007] As the lifting ring slides up and down, the pulling plate pulls the flip block to rotate around the first pin, so that the flip block moves closer to the friction block to clamp the metal plate, or the flip block moves away from the friction block to release the metal plate.

[0008] Furthermore, the clamping structure further includes a lock, which includes a tension spring, a U-shaped frame and a limit rod. The U-shaped frame is rotatably arranged between the two connecting plates and is located on the same side of the opening as the flip block. The limit rod is arranged between the two pull plates. A first connecting rod is arranged between the U-shaped frames, and a second connecting rod is arranged between the two pull plates. One end of the tension spring is rotatably connected to the first connecting rod, and the other end is rotatably connected to the second connecting rod.

[0009] The U-shaped frame has an unlocking position and a locking position. When the U-shaped frame is in the unlocking position, the tension spring is in a natural state. When the U-shaped frame is rotated to the locking position under force, it rests on the limit rod, and the tension spring is in a stretched state. Under the tension of the tension spring, the pull plate pulls the flip block and has a tendency to rotate toward the friction block.

[0010] Furthermore, the U-shaped frame includes two side plates arranged opposite to each other, and each of the side plates is rotatably connected to one of the connecting plates via a fourth pin shaft.

[0011] Furthermore, the connecting plate is provided with a fixing hole for the first pin to pass through and rotate therein, and the flip block is provided with a rotating hole for the first pin to pass through.

[0012] Furthermore, a connecting hole for the second pin to pass through and rotate therein is opened on the flip block, and a connecting hole for the second pin to pass through is opened on both of the pull plates.

[0013] Furthermore, a sliding groove is provided on one wall opposite to the two connecting plates, and the third pin is slidably connected to the inner side of the sliding groove.

[0014] Furthermore, both pull plates are provided with a rotating hole for the third pin to pass through and rotate therein.

[0015] Furthermore, a plurality of anti-slip grooves are provided on a side of the flip block facing the friction block. The flip block is crescent-shaped with one end protruding outward. The pull plate is rotatably connected to the protruding portion of the flip block via the second pin shaft.

[0016] Furthermore, two blocking rods are relatively arranged between the two connecting plates. The two blocking rods are respectively located on both sides of the lifting ring and are used to limit the rotation angle of the lifting ring.

[0017] Compared with the existing technology, the technical solution of this application has the following beneficial effects:

[0018] The metal sheet lifting and clamping mechanism is provided with a clamping structure. Only by pulling the lifting ring up and down can the flip block be driven to flip, so that the flip block can abut and fix the metal sheet on the friction block. The flip block and the friction block cooperate to clamp and fix the metal sheet, so the metal sheet can be clamped and fixed without using power or hydraulics as a driving source, which can effectively reduce the cost of lifting the metal sheet and improve the environmental protection factor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the utility model;

[0020] Figure 2 This is a structural diagram of the lifting ring and the rotating shaft of the utility model;

[0021] Figure 3 This is a schematic structural diagram of the flip block and support rod of the utility model;

[0022] Figure 4 It is a right side structural schematic diagram of the U-shaped frame and tension spring of the utility model.

[0023] In the figure: 1 connecting plate, 2 lifting ring, 31 friction block, 32 flip block, 33 first pin, 34 pull plate, 35 third pin, 36 tension spring, 37 U-shaped frame, 38 second pin, 39 fourth pin; 40, limit rod; 41, stop rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1 In this embodiment, a metal plate lifting and clamping mechanism includes a lifting ring 2 and two parallel connecting plates 1. The lifting ring 2 is set between the two connecting plates 1 and slides up and down within a preset range. An opening is provided under the two connecting plates 1, and the opening is used to place the metal plate to be clamped. A clamping structure is provided between the two connecting plates 1.

[0026] In addition, two third connecting rods are fixed between the two connecting plates 1, and the two connecting plates 1 can be connected and fixed together through the two third connecting rods.

[0027] See also Figures 1 to 4The clamping structure in this embodiment includes a friction block 31 fixed to the opposite side of the two connecting plates 1 and located on the left side of the opening. The clamping structure also includes a first pin 33 passing through the two connecting plates 1. The flip block 32 is rotatably connected between the two connecting plates 1 through the first pin 33. The flip block 32 is located on the right side of the opening, that is, the friction block 31 and the flip block 32 are respectively located on both sides of the opening; along the thickness direction of the flip block 32, pull plates 34 are respectively provided on the opposite sides of the flip block 32, and a second pin 38 passes through the flip block 32. The lower ends of the two pull plates 34 are rotatably connected to the flip block 32 through the second pin 38. The clamping structure also includes a third pin 35 passing through the lifting ring 2 and located between the two connecting plates 1. The top ends of the two pull plates 34 are rotatably connected to the lifting ring 2 through the third pin 35.

[0028] Among them, a fixing hole is provided on the connecting plate 1 for the first pin shaft 33 to pass through and rotate therein, and a rotating hole is provided on the flip block 32 for the first pin shaft 33 to pass through, so that the flip block 32 can flip on the surface of the first pin shaft 33 through the rotating hole, so that it can be stably flipped between the two connecting plates 1 through the first pin shaft 33.

[0029] In addition, a connecting hole is formed on the top of the flip block 32 for the second pin 38 to pass through and rotate within. Connecting holes are also formed on the two pull plates 34 for the second pin 38 to pass through, allowing the flip block 32 and the two pull plates 34 to rotate on the surface of the second pin 38. The two pull plates 34 are connected to the flip block 32 via the second pin 38, meaning that the lifting ring 2 can drive the flip block 32 to flip via the two pull plates 34. As the lifting ring 2 slides up and down, the pull plates 34 pull the flip block 32 to rotate around the first pin 33, causing the flip block 32 to move closer to the friction block 31 to clamp the metal plate, or away from the friction block 31 to release the metal plate. Specifically, as the lifting ring 2 moves upward, the pull plate 34 pulls the flip block 32 to rotate around the first pin 33, and the flip block 32 rotates toward the friction block 31 to clamp the metal plate. As the lifting ring 2 moves downward, the pull plate 34 pulls the flip block 32 to rotate around the first pin 33 away from the friction block 31 to loosen the metal plate.

[0030] At the same time, a sliding groove is opened on the opposite wall of the two connecting plates 1, and the third pin shaft 35 is slidably connected to the inner side of the sliding groove. The third pin shaft 35 can limit its moving range between the two connecting plates 1 through the two sliding grooves, so as to limit the moving range of the lifting ring 2, and ensure that the lifting ring 2 can move vertically between the two connecting plates 1; at the same time, the sliding groove can also limit the moving range of the third pin shaft 35 in the up and down directions, so as to limit the moving range of the lifting ring 2 in the up and down directions, and prevent the lifting ring 2 from falling completely between the two connecting plates 1.

[0031] In addition, a rotating hole is provided on the opposite side of the two pull plates 34 for the third pin 35 to pass through and rotate therein. The two pull plates 34 can be moved on the surface of the third pin 35 through the rotating hole, so that the two pull plates 34 can be connected to the lifting ring 2 through the third pin 35.

[0032] The side of the flip block 32 facing the friction block 31 is provided with multiple anti-slip grooves, enhancing the anti-slip properties between the flip block 32 and the metal sheet. Specifically, the flip block 32 is semi-lunar in shape, with one end protruding outward. The pull plate 34 is pivotally connected to the protruding portion of the flip block 32 via a second pin 38, allowing the pull plate 34 to smoothly pull the flip block 32 in rotation.

[0033] Secondly, the clamping structure also includes a locking member, which includes a tension spring 36, a U-shaped frame 37 and a limit rod 40. The U-shaped frame 37 is rotatably arranged between the two connecting plates 1 and is located on the same side as the opening relative to the flip block 32. The limit rod 40 is arranged between the two pull plates 34. A first connecting rod is arranged between the U-shaped frame 37, and a second connecting rod is arranged between the two pull plates 34. One end of the tension spring 36 is rotatably connected to the first connecting rod, and the other end is rotatably connected to the second connecting rod; the U-shaped frame 37 has an unlocking position and a locking position. When the U-shaped frame 37 is in the unlocking position, the tension spring 36 is in a natural state. At this time, the lifting ring 2 can move freely up and down, that is, the flip block 32 can rotate freely; when the U-shaped frame 37 is forced to rotate to the locking position, it abuts against the limit rod 40. In this embodiment, the U-shaped frame 37 is forced to rotate upward to the locking position, and the tension spring 36 is in a stretched state. When the U-shaped frame 37 rotates toward the locked position, it reaches a critical position. When this critical position is exceeded, the tension spring 36 cannot rebound freely due to the restraining force of the U-shaped frame 37, thereby stabilizing in a stretched state. Under the tension of the tension spring 36, the pull plate 34 pulls the flip block 32, which has a tendency to rotate toward the friction block 31. After the U-shaped frame rotates to the locked position, it stabilizes in the locked position, stretching the tension spring 36. The tension spring 36 pulls the lower end of the pull plate 34 upward, preventing the lifting ring 2 from moving downward and the flip block 32 from rotating freely. In other words, the flip block 32 is stabilized in the position of clamping the metal plate, achieving the locking of the clamping structure. When unlocking is required, the U-shaped frame 37 is pulled downward so that the U-shaped frame 37 rotates to the critical retraction position, and the tension spring 36 rebounds quickly, releasing the pulling restriction on the pull plate 34. The ring 2 slides down freely under the action of gravity, driving the flip block 32 to loosen the metal plate. After the pull plate 34 can move freely, the flip block 32 can also rotate freely, that is, the metal plate is automatically loosened.

[0034] Specifically, the U-shaped frame 37 includes two oppositely disposed side panels, each of which is rotatably connected to a connecting plate 1 via a fourth pin 39. Preferably, the U-shaped frame 37 also includes a transverse plate located between the two side panels, with an unlocking hole formed on the transverse plate to facilitate an operator's finger to pass through the unlocking hole to pull the U-shaped frame 37.

[0035] In this embodiment, two stoppers 41 are positioned between the two connecting plates 1, one on each side of the lifting ring 2, to limit the rotation angle of the lifting ring 2. When the lifting ring 2 is unloaded, it naturally rotates and falls about the third pin 35 under the action of gravity. Due to the restriction of the stoppers 41, the lifting ring 2 rotates until it abuts the stoppers 41, thus preventing the lifting ring 2 from continuing to rotate downward and falling completely between the two connecting plates 1.

[0036] The working principle of the above embodiment is:

[0037] When the lever 32 is in the unlocked position, the lever 32 is in the unlocked position, and the second lever 32 is engaged with the second lever 34, thereby locking the lever 32 in the unlocked position. The crane can lift the metal sheet through the lifting ring 2, so that the metal sheet can be clamped and fixed without using power or hydraulic pressure as a driving source. When the metal sheet needs to be released, the crane lowers the lifting ring 2, and the U-shaped frame 37 is turned downward. After the U-shaped frame 37 retreats beyond the critical position, the tension spring 36 automatically rebounds, causing the tension spring 36 to lose its restrictive effect on the pull plate 34 and the flip block 32. The lifting ring 2 slides down under the action of gravity, driving the pull plate 34 to move. The pull plate 34 drives the flip block 32 to flip to the right, so that the flip block 32 is away from the friction block 31, and the metal sheet can be released. This metal sheet lifting and clamping mechanism can effectively reduce the cost of lifting metal sheets and improve the environmental factor. For example, when clamping and fixing a metal sheet with a bent edge, the bent end of the metal sheet needs to be inserted into the opening of the connecting plate 1, and the above steps are repeated. The flip block 32 and the friction block 31 can clamp and fix the bent end of the metal sheet.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0039] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A metal plate lifting and clamping mechanism, comprising a lifting ring (2) and two connecting plates (1) arranged in parallel, characterized in that: The lifting ring (2) is slidably mounted between the two connecting plates (1) within a preset range. An opening is provided below each of the two connecting plates (1) for inserting a metal plate to be clamped. A clamping structure is provided between the two connecting plates (1). The clamping structure includes a friction block (31) fixed to one side opposite to the two connecting plates (1), and a flip block (32) rotatably connected between the two connecting plates (1) via a first pin shaft (33), wherein the friction block (31) and the flip block (32) are respectively located on both sides of the opening; the clamping structure also includes two pull plates (34) located on both sides of the flip block (32), one end of the two pull plates (34) is rotatably connected to the flip block (32) via a second pin shaft (38), and the other end is rotatably connected to the hanging ring (2) via a third pin shaft (35); As the lifting ring (2) slides up and down, the pulling plate (34) pulls the flip block (32) to rotate around the first pin shaft (33), so that the flip block (32) approaches the friction block (31) to clamp the metal plate, or the flip block (32) moves away from the friction block (31) to loosen the metal plate.

2. The metal sheet lifting and clamping mechanism according to claim 1, characterized in that: The clamping structure also includes a locking member, which includes a tension spring (36), a U-shaped frame (37) and a limiting rod (40). The U-shaped frame (37) is rotatably arranged between the two connecting plates (1) and is located on the same side relative to the opening as the flip block (32). The limiting rod (40) is arranged between the two pulling plates (34). A first connecting rod is arranged between the U-shaped frames (37), and a second connecting rod is arranged between the two pulling plates (34). One end of the tension spring (36) is rotatably connected to the first connecting rod, and the other end is rotatably connected to the second connecting rod. The U-shaped frame (37) has an unlocking position and a locking position. When the U-shaped frame (37) is located at the unlocking position, the tension spring (36) is in a natural state. When the U-shaped frame (37) is rotated to the locking position under force, it abuts against the limit rod (40), and the tension spring (36) is in a stretched state. Under the pulling force of the tension spring (36), the pull plate (34) pulls the flip block (32) to have a tendency to rotate toward the friction block (31).

3. The metal sheet lifting and clamping mechanism according to claim 2, characterized in that: The U-shaped frame (37) comprises two side plates arranged opposite to each other, and each side plate is rotatably connected to one of the connecting plates (1) via a fourth pin shaft (39).

4. The metal plate lifting and clamping mechanism according to claim 1, characterized in that: The connecting plate (1) is provided with a fixing hole for the first pin shaft (33) to pass through and rotate therein, and the flip block (32) is provided with a rotating hole for the first pin shaft (33) to pass through.

5. The metal plate lifting and clamping mechanism according to claim 1, characterized in that: A connecting hole for the second pin shaft (38) to pass through and rotate therein is provided on the flip block (32), and a connecting hole for the second pin shaft (38) to pass through is provided on both the pull plates (34).

6. The metal plate lifting and clamping mechanism according to claim 1, characterized in that: A sliding groove is provided on one opposite wall of the two connecting plates (1), and the third pin shaft (35) is slidably connected to the sliding groove.

7. The metal plate lifting and clamping mechanism according to claim 1, characterized in that: The two pull plates (34) are both provided with a rotating hole for the third pin shaft (35) to pass through and rotate therein.

8. The metal plate lifting and clamping mechanism according to claim 1, characterized in that: The flip block (32) is provided with a plurality of anti-slip grooves on a side facing the friction block (31). The flip block (32) is semi-lunar in shape and one end protrudes outward. The pull plate (34) is rotatably connected to the protruding portion of the flip block (32) via the second pin shaft (38).

9. The metal plate lifting and clamping mechanism according to claim 1, characterized in that: Two blocking rods (41) are relatively arranged between the two connecting plates (1). The two blocking rods (41) are respectively located on both sides of the hanging ring (2) and are used to limit the rotation angle of the hanging ring (2).

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