Lifting appliance

Abstract

The utility model discloses a lifting appliance which comprises a pair of clamping mechanisms and a pair of connecting chains, and each clamping mechanism comprises an L-shaped base, a pressing rod, a tension spring and an abutting block; the L-shaped base comprises a supporting beam and a vertical rod, the middle of the pressing rod is hinged to the top end of the vertical rod, the connecting chain is hinged to the top end of the pressing rod, the two ends of the tension spring are fixed to the top end of the vertical rod and the top end of the pressing rod respectively, the abutting block is hinged to the bottom end of the pressing rod, and the bottom end of the abutting block is arranged to be a plane. A flange plate of the H-shaped steel is clamped between the supporting beam and the abutting block, and the two clamping mechanisms are not located on the same vertical plane. The lifting appliance has the advantages that the abutting block in the clamping mechanism can be completely attached to the surface of the flange plate of the H-shaped steel in a self-adaptive manner, so that the clamping mechanism of the lifting appliance firmly clamps the H-shaped steel; and the two clamping mechanisms are spaced along the length direction of the H-shaped steel, so that one end of the H-shaped steel cannot tilt during hoisting, and the H-shaped steel can be prevented from falling off from the clamp.

Description

TECHNICAL FIELD

[0001] The utility model relates to a lifting appliance technical field, especially a lifting appliance. BACKGROUND

[0002] H-shaped steel is a kind of economic section high-efficiency section bar with more optimized section area distribution and more reasonable strength-weight ratio, and it is named because its section is same as the English letter "H". Since each part of H-shaped steel is arranged at right angles, H-shaped steel has the advantages of strong bending resistance in each direction, simple construction, cost saving and light structure weight, and has been widely applied. H-shaped steel is composed of two mutually parallel flange plates and a web plate arranged between the two flange plates. Since H-shaped steel is large, when it is necessary to load or unload H-shaped steel, a special lifting appliance is needed to clamp H-shaped steel.

[0003] The existing special lifting appliance comprises a positioning connecting mechanism and a pair of lifting clamping mechanisms, and the two lifting clamping mechanisms are arranged at the two ends of the positioning connecting mechanism, so that the two lifting clamping mechanisms are located on the same vertical plane. After the two lifting clamping mechanisms of the existing special lifting appliance complete clamping of H-shaped steel, the bottom end of the pressing strip abuts against the flange plate of H-shaped steel, and the plane where the two lifting clamping mechanisms are located is perpendicular to the length direction of H-shaped steel.

[0004] Through the existing special lifting appliance, the clamping of H-shaped steel is not firm, and after H-shaped steel is clamped, the end of H-shaped steel is easily lifted, which causes H-shaped steel to fall off from the special lifting appliance, and improvement is needed. INVENTION CONTENTS

[0005] The utility model aims at providing a H-shaped steel lifting appliance, which can firmly clamp H-shaped steel, and after lifting, H-shaped steel will not be lifted at one end to cause H-shaped steel to fall off.

[0006] The utility model provides a lifting appliance, including a pair of clamping mechanisms and a pair of connecting chains, the clamping mechanism includes L type base, pressing rod, tension spring and abutment block, L type base includes support beam and vertical rod, the middle part of pressing rod is hinged with the top end of vertical rod, the top end of pressing rod is hinged with connecting chain, the both ends of tension spring are fixed with vertical rod and the top end of pressing rod respectively, the bottom end of abutment block is hinged with the bottom end of pressing rod, the bottom end of abutment block is provided as plane, the flange plate of H-shaped steel is clamped between support beam and abutment block, and the two clamping mechanisms are not on the same vertical plane.

[0007] Preferably, the vertical rod is composed of a rod body portion and a hinge portion, the hinge portion is located at the top end of the rod body portion, the hinge portion and the rod body portion are arranged obliquely, and the hinge portion is located obliquely above the support beam, and the pressing rod is hinged with the hinge portion.

[0008] Preferably, a hinge groove is formed at the hinge part, and the pressing rod is embedded in the hinge groove and hinged to the hinge part by a bolt.

[0009] Preferably, the angle between the hinge part and the rod body part is A, and A = 135 degrees.

[0010] Preferably, the surface of the support beam is provided with a plurality of protrusions, and the plurality of protrusions are uniformly distributed on the surface of the support beam.

[0011] Preferably, the protrusions are frustoconical.

[0012] Preferably, the top end of the pressing rod is provided with a hinge hole, one end of the connecting chain is provided with a connecting ring, and the connecting ring is hinged in the hinge hole of the pressing rod.

[0013] Preferably, the L-shaped base, the pressing rod and the abutting block are made of steel material.

[0014] Preferably, the clamping positions of the two clamping mechanisms on the H-shaped steel are symmetric about the center of the H-shaped steel, the distance between the two clamping mechanisms is L, the length of the H-shaped steel is T, and 0.2T < L < 0.3T is satisfied.

[0015] From the above description of the utility model, the utility model has the following beneficial effects:

[0016] 1. The abutting block is arranged at the bottom end of the pressing rod, so as to increase the contact area with the flange plate of the H-shaped steel, and the abutting block and the pressing rod are hinged, so as to adapt to the thickness of the flange plate and the clamping position of the flange plate, so that the bottom surface of the abutting block is completely attached to the surface of the flange plate, and the clamping mechanism clamps the flange plate of the H-shaped steel more firmly.

[0017] 2. The two clamping mechanisms of the H-shaped steel lifting appliance are independently arranged, and after the two clamping mechanisms clamp the flange plate of the H-shaped steel, the clamped positions of the two clamping mechanisms are symmetric about the center of the H-shaped steel, so as to prevent the H-shaped steel from being lifted and the phenomenon that one end of the H-shaped steel is lifted and separated from the H-shaped steel lifting appliance.

[0018] 3. The surface of the support beam is provided with a plurality of protrusions, so as to increase the surface roughness of the support beam and increase the friction between the support beam and the flange plate of the H-shaped steel, so that the clamping mechanism clamps the flange plate of the H-shaped steel more firmly. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a state diagram when the lifting appliance clamps the flange plate of the H-shaped steel according to an embodiment;

[0020] Figure 2 is a structural schematic view of an embodiment of a clamping mechanism;

[0021] Figure 3 is a front view of an embodiment of an L-shaped base;

[0022] Figure 4 is a partial structural schematic view of an embodiment of a lifting tool;

[0023] Figure 5 is a structural schematic view of an embodiment of an L-shaped base;

[0024] Figure 6 is a structural schematic view of an embodiment of a connecting ring;

[0025] Figure 7 is a front view of an embodiment of a lifting tool clamping a flange plate of an H-shaped steel.

[0026] Reference signs: 1, clamping mechanism; 11, L-shaped base; 111, support beam; 112, vertical rod; 1121, rod body part; 1122, hinged part; 1123, hinged groove; 113, protrusion; 12, pressing rod; 121, hinged hole; 13, abutting block; 14, tension spring; 2, connecting chain; 21, connecting ring. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. Figures 1-7 and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0028] Reference is made to Figures 1-4The utility model provides a kind of lifting appliance, including a pair of clamping mechanism 1 and a pair of connecting chain 2, clamping mechanism 1 includes L-shaped base 11, compression rod 12, abutting block 13 and tension spring 14, wherein L-shaped base 11 is made of support beam 111 and vertical rod 112, and vertical rod 112 is perpendicular to support beam 111 each other.Vertical rod 112 is made of stem part 1121 and hinged part 1122, keep hinged part 1122 and stem part 1122 each other oblique, the oblique angle between hinged part 1122 and stem part 1122 is set as 'A', and satisfy A=135 degrees, so that hinged part 1122 is located in the oblique upper side of support beam 111.The middle part of compression rod 12 is hinged with the hinged part 1122 of L-shaped base 11, and the bottom end of compression rod 12 is hinged with abutting block 13, one end of connecting chain 2 is hinged with the top end of compression rod 12;And the two ends of tension spring 14 are fixed with vertical rod 112 and the top end of compression rod 12 respectively.In addition, L-shaped base 11, compression rod 12 and abutting block 13 are all made of steel material, so that the formed clamping mechanism 1 has greater structural strength.

[0029] With reference to Figure 5 And Figure 6 For this, hinged groove 1123 is formed at the hinged part 1122 of L-shaped base 11, when compression rod 12 and L-shaped base 11 are hinged, compression rod 12 is embedded into the hinged groove 1123 of hinged part 1122, and compression rod 12 and hinged part 1122 are hinged by bolt.The hinged part 1122 and stem part 1122 are arranged obliquely, so that compression rod 12 has greater range of motion after being hinged with hinged part 1122, to avoid interference between abutting block 13 installed at the bottom end of compression rod 12 and stem part 1121 of vertical rod 112.In order to facilitate the connection between connecting chain 2 and compression rod 12, hinged hole 121 is formed at the top end of compression rod 12, and connecting ring 21 is provided at one end of connecting chain 2, by hinging connecting ring 21 in hinged hole 121 at the top end of compression rod 12.So that connecting chain 2 and compression rod 12 are hinged firmly, and the disassembly between connecting chain 2 and compression rod 12 is facilitated.

[0030] With reference to Figure 1 And Figure 2In the process of not lifting the clamping mechanism 1 by the connecting chain 2, the pressing rod 12 is always separated from the supporting beam 111 under the action of the tension spring 14. When the flange plate of the H-shaped steel needs to be clamped by the clamping mechanism 1, the supporting beam 111 of the clamping mechanism 1 is placed at the bottom end of the flange plate, and the abutting block 13 at the bottom end of the pressing rod 12 is abutted against the top surface of the flange plate under the action of the connecting chain 2. The abutting block 13 is arranged at the bottom end of the pressing rod 12, and compared with the direct abutment of the bottom end of the pressing rod 12 and the top end of the flange plate, the abutting area between them is increased, so that the flange plate is clamped more firmly by the clamping mechanism 1.

[0031] Referring to Figure 2 and Figure 5 The abutting block 13 is connected to the bottom end of the pressing rod 12 in a hinged manner, and the bottom end of the abutting block 13 is arranged as a plane, so that the abutting block 13 can be self-adaptive when clamping the flange plate of different thicknesses, so that the bottom end of the abutting block 13 is fully matched with the surface of the flange plate. In order to further enable the clamping mechanism 1 to firmly clamp the H-shaped steel, a plurality of protrusions 113 are arranged on the surface of the supporting beam 111, the plurality of protrusions 113 are uniformly distributed on the surface of the supporting beam 111, and the plurality of protrusions 113 are arranged in a circular truncated cone shape. The plurality of protrusions 113 arranged on the surface of the supporting beam 111 increase the surface roughness of the supporting beam 111, so as to increase the friction force of the supporting beam 111 and the abutting block 13 when clamping the flange plate, thereby clamping the flange plate more firmly.

[0032] Referring to Figure 7 When the H-shaped steel is lifted by the H-shaped steel lifting device, the two clamping mechanisms 1 clamp the flange plate of the H-shaped steel, so that the two clamping mechanisms 1 are not in the same vertical plane, and the positions of the two clamping mechanisms 1 clamping the H-shaped steel are symmetric about the center of the H-shaped steel. After the two clamping mechanisms 1 clamp the flange plate of the H-shaped steel, the distance between the two clamping mechanisms 1 is set as “L”, the length of the H-shaped steel is set as “T”, and the relationship between the distance between the two clamping mechanisms 1 and the length of the H-shaped steel satisfies 0.2T

[0033] The specific implementation principle of the embodiment of the application is as follows: in a normal state, the pressing rod 12 keeps the abutting block 13 separated from the support beam 111 under the action of the tension spring 14. When the H-shaped steel needs to be lifted by the H-shaped steel lifting device, the support beams 111 of the two clamping mechanisms 1 are respectively arranged below the flange plates on the two sides of the H-shaped steel, and the distance between the two clamping mechanisms 1 is kept. Then the connecting chain 2 is lifted upward to drive the abutting block 13 hinged to the bottom end of the pressing rod 12 to abut against the flange plate of the H-shaped steel, and the support beam 111 is abutted against below the flange plate of the H-shaped steel. The protrusions 113 arranged on the surface of the support beam 111 increase the surface roughness of the support beam 111, so as to increase the friction between the clamping mechanism 1 and the bottom surface of the flange plate.

[0034] The abutting block 13 is hinged to the bottom end of the pressing rod 12, and can be self-adapted according to the thickness of the flange plate and the clamping position of the flange plate, so as to make the bottom surface of the abutting block 13 completely fit the surface of the flange plate, so as to make the clamping mechanism 1 firmly clamp the flange plate of the H-shaped steel. After the two clamping mechanisms 1 firmly clamp the flange plates on the two sides of the H-shaped steel respectively, it is ensured that the clamping positions of the two clamping mechanisms 1 on the H-shaped steel are symmetric about the center of the H-shaped steel, and the distance between the two clamping mechanisms 1 is kept appropriate. In this way, the H-shaped steel can keep balance after being lifted, and the phenomenon that the H-shaped steel is lifted with one end raised is prevented.

[0035] The utility model is described above in conjunction with the drawings, and obviously, the specific implementation of the utility model is not limited by the above mode, as long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model, or the concept and technical scheme of the utility model is directly applied to other occasions without improvement, and the protection of the utility model is obtained.

Claims

1. A spreader, characterized by: The device comprises a pair of clamping mechanisms and a pair of connecting chains, wherein the clamping mechanism comprises an L-shaped base, a pressing rod, a tension spring and an abutting block. The L-shaped base comprises a support beam and a vertical rod, the middle part of the pressing rod is hinged to the top end of the vertical rod, the connecting chain is hinged to the top end of the pressing rod, the two ends of the tension spring are fixed to the top end of the vertical rod and the top end of the pressing rod respectively, the abutting block is hinged to the bottom end of the pressing rod, and the bottom end of the abutting block is provided as a plane. The flange plate of the H-shaped steel is clamped between the support beam and the abutting block, and the two clamping mechanisms are not in the same vertical plane.

2. A lifting harness according to claim 1, characterised in that: The vertical rod is composed of a rod body part and a hinge part, the hinge part is located at the top end of the rod body part, the hinge part and the rod body part are arranged at an angle, and the hinge part is located obliquely above the support beam, and the pressing rod is hinged to the hinge part.

3. A lifting harness according to claim 2, characterised in that: The hinge part is provided with a hinge groove, one side of the pressing rod is embedded in the hinge groove, and the pressing rod and the hinge part are hinged by bolts.

4. The sling of claim 2, wherein: The angle between the hinge part and the rod body part is A, and A=135 degrees.

5. The lifting harness of claim 1, wherein: The surface of the support beam is provided with a plurality of protrusions, and the protrusions are uniformly distributed along the surface of the support beam.

6. A lifting harness according to claim 5, characterised in that: The protrusions are in the shape of a circular truncated cone.

7. The lifting harness of claim 1, wherein: The top end of the pressing rod is provided with a hinge hole, one end of the connecting chain is provided with a connecting ring, and the connecting ring is hinged in the hinge hole of the pressing rod.

8. The lifting harness of claim 1, wherein: The L-shaped base, the pressing rod and the abutting block are made of steel.

9. The lifting harness of claim 1, wherein: The clamping positions of the two clamping mechanisms on the H-shaped steel are symmetric about the center of the H-shaped steel, the distance between the two clamping mechanisms is L, the length of the H-shaped steel is T, and 0.2T

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