Bar double-claw clamp type lifting appliance

Abstract

The utility model relates to the field of lifting appliances, in particular to a bar double-claw clamp type lifting appliance which comprises a lifting appliance body, the lifting appliance body comprises a lifting arm, connecting rod assemblies and a self-locking rod, two sets of limiting pieces are arranged at the bottom of the lifting arm, the connecting rod assemblies are installed on first pin shafts on the inner sides of the limiting pieces, and a second pin shaft is arranged between the two connecting rod assemblies in a penetrating mode. Each connecting rod assembly comprises a first connecting swing arm, a second connecting swing arm, a third connecting swing arm, a fourth connecting swing arm, a first clamping jaw swing arm, a second clamping jaw swing arm, a third clamping jaw swing arm and a fourth clamping jaw swing arm, the inner walls of the second clamping jaw swing arm, the first connecting plate and the third clamping jaw swing arm form a first clamping part, and the inner walls of the first clamping jaw swing arm, the second connecting plate and the fourth clamping jaw swing arm form a second clamping part; and the clamping part II and the clamping part I are matched for clamping the bar. According to the utility model, when the bar is hoisted, the bar is automatically held by self weight, so that the stability of the bar during clamping and transporting is improved, the surface quality of a product is improved, and the experience feeling of a customer is improved.

Description

Technical Field

[0001] This utility model relates to the field of lifting tools, specifically a double-jaw clamp type lifting tool for bar stock. Background Technology

[0002] Currently, the workshop mainly uses chain-type clamps to grip bar stock. However, due to the large size and weight of the bar stock, the clamping force is insufficient, resulting in localized force concentration during the clamping process. This can easily cause the bar stock to tilt, increasing operational safety hazards. Furthermore, after gripping and placing the bar stock, it has been found that the surface of the bar stock in contact with the clamp is damaged, affecting the quality of the bar stock products and leaving customers with a bad experience.

[0003] Therefore, there is an urgent need to design a lifting device to improve the surface quality of products. Utility Model Content

[0004] The purpose of this utility model is to provide a double-jaw gripper for bar stock. Through the design of the gripper body, the contact area between the grippers and the bar stock during lifting is increased, ensuring gripper strength while improving stability during bar stock gripping. This reduces the risk of localized stress concentration causing bar stock tilting and damage, improves product surface quality, and enhances customer experience. Furthermore, the inner walls of the second and third gripper arms and the connecting plate of each linkage assembly form a first clamping part, while the inner walls of the first and fourth gripper arms and the connecting plate form a second clamping part. This increases the contact area between the grippers and the bar stock. Combined with the design of the two linkage assemblies, a double-jaw structure is formed, improving gripper strength, eliminating bar stock tilting, and ensuring stability during bar stock gripping.

[0005] To solve the above-mentioned technical problems, this utility model provides a bar stock double-jaw clamp lifting device, including a lifting device body. The lifting device body includes a lifting arm, a connecting rod assembly, and a self-locking rod. The top of the lifting arm is provided with a lifting lug, and the bottom is provided with two sets of limiting members. A first pin is inserted through the two sets of limiting members. The connecting rod assembly is installed on the first pin inside each set of limiting members. A second pin is inserted between the two connecting rod assemblies. There are two self-locking rods, which are respectively installed on the connecting rod assemblies. Each connecting rod assembly includes a connecting swing arm one, a connecting swing arm two, a connecting swing arm three, and a connecting swing arm four. The system comprises four gripper arms: a first gripper arm, a second gripper arm, a third gripper arm, and a fourth gripper arm. Each of the four gripper arms intersects in pairs, with their upper ends overlapping and fitted onto a first pin. A first bushing is provided between the second and third gripper arms, and the bushing is fitted onto the first pin. Each of the four gripper arms intersects in pairs, with their middle overlaps and fitted onto a second pin. A second bushing is provided between the second and third gripper arms, and the bushing is fitted onto the second pin.

[0006] The upper ends of the second and third gripper arms are located inside the first and fourth connecting arms, and the first, second, third, and fourth connecting arms are connected by a connector. A connecting plate is fixedly provided between the lower ends of the second and third gripper arms. The upper ends of the first and fourth gripper arms are located outside the second and third connecting arms, respectively. The first gripper arm, the second connecting arm, the third connecting arm, and the fourth gripper arm are connected by a second connector. A second connecting plate is fixed between the lower ends of the first gripper arm and the fourth gripper arm. The inner walls of the second gripper arm, the first connecting plate, and the third gripper arm form a first clamping part, and the inner walls of the first gripper arm, the second connecting plate, and the fourth gripper arm form a second clamping part. The second clamping part cooperates with the first clamping part to clamp the bar stock.

[0007] Furthermore, a bushing three is provided between the second connecting arm and the third connecting arm, and the bushing three is sleeved on the second connecting member. A bushing four is provided between the first connecting arm and the fourth connecting arm, and the bushing four is sleeved on the first connecting member. One end of each self-locking rod is sleeved on the bushing three, and the other end is provided with several slots, and any one of the slots cooperates with the bushing four.

[0008] Furthermore, the lower ends of the first, second, third, and fourth gripper arms are arc-shaped, and their inner surfaces are the same as the inner contours of the first and second connecting plates.

[0009] Furthermore, the lower ends of the first, second, third, and fourth gripper arms are irregularly shaped, and their inner surfaces are the same as the inner contours of the first and second connecting plates.

[0010] Furthermore, both the first connector and the second connector are rivet shafts.

[0011] Furthermore, each set of limiting components includes two symmetrically arranged limiting blocks, each of which is fixed to the boom and sleeved on the first pin.

[0012] Furthermore, the lugs are two in number and arranged opposite to each other.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model increases the contact area between the gripper and the bar during lifting by designing the gripper body. This ensures gripper strength while improving stability during bar clamping, reducing the risk of bar tilting and damage due to localized stress concentration, improving product surface quality, and enhancing customer experience. Furthermore, the inner walls of the gripper swing arms 2 and 3 and the connecting plate 1 of each linkage assembly form clamping part 1, while the inner walls of the gripper swing arms 1 and 4 and the connecting plate 2 form clamping part 2. This increases the contact area between the gripper and the bar. Combined with the design of the two linkage assemblies, a double-claw structure is formed, which improves gripper strength, eliminates bar tilting, and ensures stability during bar clamping.

[0015] 2. This utility model, through the design of the self-locking rod, can lock the clamping angle between the clamping part one and the clamping part two, ensuring the safety of the lifting device body during the lifting process of the bar material, reducing safety hazards, and through the design of the slot being locked in the bushing four, reducing the friction between the self-locking rod and the connecting part one;

[0016] 3. Through the design of bushing one, bushing two, bushing three and bushing four, this utility model can reduce the friction during the rotation of connecting swing arms one, connecting swing arms two, connecting swing arms three, connecting swing arms four, gripper swing arms one, gripper swing arms two, gripper swing arms three and gripper swing arms four during the use of the lifting device body, and avoid the phenomenon of deviation, thereby improving the service life of the lifting device body.

[0017] 4. By designing the lower ends of the first, second, third and fourth gripper arms as arc-shaped, and their inner surfaces being the same as the inner contours of the first and second connecting plates, this utility model can increase the contact area with the outer circle of the bar stock and improve the stability of the lifting device body during the clamping process.

[0018] 5. This utility model designs the lower ends of the first, second, third and fourth gripper arms as irregular shapes, and their inner surfaces are the same as the inner contours of the first and second connecting plates, which can be applied to clamps of irregular long bars, thus improving the application range of the lifting device body. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a structural schematic diagram of the bar stock double-jaw clamp lifting device of this utility model;

[0021] Figure 2 This is a schematic diagram of the bar stock double-jaw clamp type lifting device from another direction;

[0022] Figure 3 This is a schematic diagram of the structure of bushing one and bushing two of this utility model;

[0023] Figure 4 This is a structural schematic diagram of bushing three and bushing four of this utility model;

[0024] In the diagram: 1-lifting boom, 2-connecting rod assembly, 3-self-locking rod, 4-lifting lug, 5-limiting component, 6-pin one, 7-pin two, 8-shoulder sleeve one, 9-shoulder sleeve two, 10-connector one, 11-connecting plate one, 12-connector two, 13-connecting plate two, 14-shoulder sleeve three, 15-shoulder sleeve four, 21-connecting swing arm one, 22-connecting swing arm two, 23-connecting swing arm three, 24-connecting swing arm four, 25-gripper swing arm one, 26-gripper swing arm two, 27-gripper swing arm three, 28-gripper swing arm four, 51-limiting stop. Detailed Implementation

[0025] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] In one specific embodiment of this utility model, such as Figure 1-4As shown, a bar stock double-jaw clamp type lifting device includes a lifting device body, which includes a lifting arm 1, a connecting rod assembly 2, and a self-locking rod 3. The top of the lifting arm 1 is provided with a lifting lug 4, and the bottom is provided with two sets of limiting members 5. A first pin 6 passes through the two sets of limiting members 5. A connecting rod assembly 2 is installed on the first pin 6 on the inner side of each set of limiting members 5. A second pin 7 passes between the two connecting rod assemblies 2. There are two self-locking rods 3, which are respectively installed on the connecting rod assemblies 2. Each connecting rod assembly 2 includes a connecting swing arm 21, a connecting swing arm 22, a connecting swing arm 3 23, a connecting swing arm 4 24, a jaw swing arm 25, a jaw swing arm 26, and a jaw. The structure of the three-arm swing arm 27 and the four-arm gripper swing arm 28 is the same as that of the connecting arm 1 21, the connecting arm 22, the connecting arm 3 23 and the connecting arm 4 24. They are intersected in pairs and their upper ends are fitted onto the pin 1 6. A bushing 1 8 is provided between the connecting arm 2 22 and the connecting arm 3 23. The bushing 1 8 is fitted onto the pin 1 6. The structure of the four-arm gripper swing arms 1 25, 26, 27 and 28 is the same. They are intersected in pairs and their middle ends are fitted onto the pin 2 7. A bushing 2 9 is provided between the two-arm gripper swing arms 26 and 27. The bushing 2 9 is fitted onto the pin 2 7.

[0027] The upper ends of the second and third gripper arms 26 and 27 are located inside the connecting arm 1 and 24, respectively, and are connected by a connector 10. A connecting plate 11 is fixedly provided between the lower ends of the second and third gripper arms 26 and 27. The upper ends of the first and fourth gripper arms 28 are located outside the connecting arm 22 and 23, respectively, and are connected by a connector 212. A connecting plate 213 is fixedly provided between the lower ends of the first and fourth gripper arms 26 and 27. The inner walls of the second and third gripper arms 26, 27, and 28 form a clamping part 1. The inner walls of plate 2 (13) and gripper arm 4 (28) form gripping part 2, which cooperates with gripping part 1 to grip the bar stock. This invention, through the design of the lifting device body, increases the contact area between the gripper and the bar stock during lifting, ensuring gripper strength while improving stability during bar stock gripping, reducing the risk of localized stress concentration causing bar stock tilting and damage, improving product surface quality, and enhancing customer experience. Furthermore, the inner walls of gripper arm 2, gripper arm 3, and connecting plate 1 of each linkage assembly form gripping part 1, while gripper arm 1, gripper arm 4, and connecting plate 2 form gripping part 2, increasing the contact area between the gripper and the bar stock. Combined with the design of the two linkage assemblies, a double-claw structure is formed, improving gripper strength, eliminating bar stock tilting, and ensuring stability during bar stock gripping.

[0028] like Figure 3-4 In this embodiment, a bushing 14 is provided between the connecting swing arm 22 and the connecting swing arm 33. The bushing 14 is fitted onto the connecting member 22. A bushing 15 is provided between the connecting swing arm 11 and the connecting swing arm 44. The bushing 15 is fitted onto the connecting member 10. One end of each self-locking rod 3 is fitted onto the bushing 14, and the other end is provided with several slots 31, and any one of the slots 31 cooperates with the bushing 15. Through the design of the self-locking rod, this utility model can lock the clamping angle between the clamping part 1 and the clamping part 2, ensuring the safety of the lifting device body during the lifting process of the bar material, reducing safety hazards, and the design of the slots being fitted onto the bushing 4 reduces the friction between the self-locking rod and the connecting member 1.

[0029] Specifically, the lower ends of the first gripper arm 25, the second gripper arm 26, the third gripper arm 27, and the fourth gripper arm 28 are arc-shaped, and their inner surfaces are the same as the inner contours of the first connecting plate 11 and the second connecting plate 13, which can increase the contact area with the outer circle of the bar and improve the stability of the lifting device body during the clamping process.

[0030] Of course, in other embodiments, the lower ends of the first gripper arm 25, the second gripper arm 26, the third gripper arm 27 and the fourth gripper arm 28 can be designed to be irregular shapes, and their inner surfaces are the same as the inner contours of the first connecting plate 11 and the second connecting plate 13, which can be applied to clamps for irregular long bars, thus improving the application range of the lifting device body.

[0031] Specifically, both connector 10 and connector 2 are rivet shafts.

[0032] Specifically, in this embodiment, each set of limiting components 5 includes two symmetrically arranged limiting blocks 51. Each limiting block 51 is fixed to the boom 1 and sleeved on the pin 6. Through the design of the limiting blocks, the stability of the lifting device body when clamping bar stock can be improved.

[0033] Specifically, in this embodiment, there are two lifting lugs 4 arranged opposite to each other, which can directly lift the lifting device body through the lifting equipment.

[0034] Specifically, in this embodiment, the weight of the lifting device body can be designed to be 10 kg to 1000 kg, which can cleverly utilize its own weight to automatically clamp the bar stock, improve the stability during the bar stock clamping process, eliminate the defect of bar stock collision damage, improve the surface quality of the product, and enhance the customer experience.

[0035] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A double-jaw clamp lifting device for bar stock, characterized in that, The lifting device includes a lifting arm (1), a connecting rod assembly (2), and a self-locking rod (3). The top of the lifting arm (1) is provided with a lifting lug (4), and the bottom is provided with two sets of limiting members (5). A first pin (6) is inserted through the two sets of limiting members (5). The connecting rod assembly (2) is installed on the first pin (6) inside each set of limiting members (5). A second pin (7) is inserted between the two connecting rod assemblies (2). There are two self-locking rods (3), which are respectively installed on the connecting rod assembly (2). Each connecting rod assembly (2) includes a first connecting arm (21), a second connecting arm (22), a third connecting arm (23), a fourth connecting arm (24), a first gripper arm (25), a second gripper arm (26), and a third gripper arm (27). ) and gripper arm four (28), the connecting arm one (21), connecting arm two (22), connecting arm three (23), and connecting arm four (24) cross each other and their upper ends are sleeved on the pin one (6), the connecting arm two (22) and the connecting arm three (23) are provided with a bushing one (8), the bushing one (8) is sleeved on the pin one (6), the gripper arm one (25), gripper arm two (26), gripper arm three (27) and gripper arm four (28) cross each other and their middle ends are sleeved on the pin two (7), the gripper arm two (26) and the gripper arm three (27) are provided with a bushing two (9), the bushing two (9) is sleeved on the pin two (7); The upper ends of the second (26) and the third (27) gripper arms are located inside the first (21) and the fourth (24) connecting arms. The first (21), the second (26), the third (27) and the fourth (24) connecting arms are connected by a connector (10). A connecting plate (11) is fixedly provided between the lower ends of the second (26) and the third (27) gripper arms. The upper ends of the first (25) and the fourth (28) gripper arms are located outside the second (22) and the third (23) connecting arms, respectively. The first gripper arm (25), the second connecting arm (22), the third connecting arm (23), and the fourth gripper arm (28) are connected by a second connector (12). A second connecting plate (13) is fixedly provided between the lower ends of the first gripper arm (25) and the fourth gripper arm (28). The inner walls of the second gripper arm (26), the first connecting plate (11), and the third gripper arm (27) constitute a clamping part one. The inner walls of the first gripper arm (25), the second connecting plate (13), and the fourth gripper arm (28) constitute a clamping part two. The clamping part two cooperates with the clamping part one to clamp the bar stock.

2. The bar stock double-jaw clamp lifting device according to claim 1, characterized in that, A bushing three (14) is provided between the second connecting arm (22) and the third connecting arm (23). The bushing three (14) is sleeved on the second connecting member (12). A bushing four (15) is provided between the first connecting arm (21) and the fourth connecting arm (24). The bushing four (15) is sleeved on the first connecting member (10). One end of each self-locking rod (3) is sleeved on the bushing three (14), and the other end is provided with several slots (31), and any one of the slots (31) cooperates with the bushing four (15).

3. The bar stock double-jaw clamp lifting device according to claim 1, characterized in that, The lower ends of the first gripper arm (25), the second gripper arm (26), the third gripper arm (27), and the fourth gripper arm (28) are arc-shaped, and their inner surfaces are the same as the inner contours of the first connecting plate (11) and the second connecting plate (13).

4. The bar stock double-jaw clamp lifting device according to claim 1, characterized in that, The lower ends of the first gripper arm (25), the second gripper arm (26), the third gripper arm (27), and the fourth gripper arm (28) are irregularly shaped, and their inner surfaces are the same as the inner contours of the first connecting plate (11) and the second connecting plate (13).

5. A bar stock double-jaw clamp lifting device according to claim 1, characterized in that, Both the first connector (10) and the second connector (12) are rivet shafts.

6. A bar stock double-jaw clamp lifting device according to claim 1, characterized in that, Each set of limiting components (5) includes two symmetrically arranged limiting blocks (51), each of the limiting blocks (51) being fixed to the boom (1) and sleeved on the first pin (6).

7. A bar stock double-jaw clamp lifting device according to claim 1, characterized in that, The lugs (4) are two in number and arranged opposite to each other.

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