CN212656547U

CN212656547U - Lever-type aluminum support auxiliary fastening device

Info

Publication number: CN212656547U
Application number: CN202021229882.6U
Authority: CN
Inventors: 古涛; 魏敏; 李修干
Original assignee: Jiangsu Jiabo Industrial Development Group Co ltd
Current assignee: Jiangsu Jiabo Industrial Development Group Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2021-03-05
Anticipated expiration: 2030-06-29

Abstract

The utility model discloses a lever type aluminum support auxiliary fastening device, which comprises a driving arm, a footing, a driven arm, a two-force rod and calipers; one end of the two-force rod is movably connected with the calipers, and the other end of the two-force rod is movably connected with the driven arm; the driven arm is fixed with a driving arm; a push-pull rod is arranged on the calipers; the push-pull rod is used for closing or opening the opening of the caliper; the caliper is adapted to be mounted on a bushing. The utility model adopts the arrangement of the active arm, the passive arm and the two-force rod, and the lever is formed by the above structure, and the problem of high difficulty in adjusting the aluminum support is solved by utilizing the lever principle and the calipers; meanwhile, the problems that the side lug of the nut is not easy to break, the support is easy to incline and the leveling is difficult are solved; the utility model discloses, can realize enlargiing of power, realize the light purpose that promotes the support of one hand.

Description

Lever-type aluminum support auxiliary fastening device

Technical Field

The utility model relates to a building tool field especially relates to a lever aluminium supports supplementary fastener.

Background

At present, when the aluminum formwork is installed, the floor formwork is supported by the common independent aluminum supports and is used for bearing the load transmitted during concrete pouring, reinforcing the floor formwork and preventing the floor from generating large deformation before the concrete is poured and solidified. Therefore, the aluminum support needs to have sufficient bearing capacity and stability. The aluminum support is fastened through an adjusting nut arranged at the bottom. When the aluminum support is erected, the adjusting nut can be manually rotated to realize the pre-tightening of the support. However, due to the lack of special tools, the adjusting nut cannot be rotated by bare hands during later-stage floor formwork leveling, and the common practice of installers is to knock three lugs on the adjusting nut with a hammer and forcibly rotate the nut by using impact load. This method has the following problems: (1) the edge lug of the nut is easy to break: because the adjusting nut is mostly formed by casting, the rigidity is poor, the lug part is easy to break under the impact of the hammer, and the support needs to be repaired when being reused; (2) the aluminum support is easy to incline: when the aluminum support adjusting nut is knocked by a hammer, the support is easy to incline under the action of transverse load, and after the support is inclined, the stability and the bearing capacity of the support are rapidly reduced, so that the phenomenon must be avoided; (3) floor formwork leveling difficulty: the floor template is adjusted to millimeter level, the worker cannot well master the beating force, and the floor template is leveled with certain difficulty.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims to provide a lever aluminium supports assists fastener to solve the big problem of the regulation degree of difficulty that exists among the prior art.

In order to solve the technical problem, the utility model discloses a technical scheme does:

a lever type aluminum support auxiliary fastening device comprises a driving arm, a bottom foot, a driven arm, a two-force rod and calipers; one end of the two-force rod is movably connected with the calipers, and the other end of the two-force rod is movably connected with the driven arm; the driven arm is fixed with a driving arm; a push-pull rod is arranged on the calipers; the push-pull rod is used for closing or opening the opening of the caliper; the caliper is adapted to be mounted on a bushing.

Furthermore, a foot is fixed at the tail end of the driven arm; the driving arm is fixed on the bottom foot and the driven arm.

Furthermore, a reinforcing rib is fixed between the outer side wall of the bottom foot and the driving arm.

Furthermore, the calipers, the driven arm and the two-force rod are all connected through pins.

Furthermore, a push-pull block and a limiting block are arranged on the push-pull rod.

Further, fixing holes are formed in two sides of the calipers; the push-pull rod penetrates through the fixing hole.

Compared with the prior art, the utility model discloses the beneficial effect who reaches is:

the utility model adopts the arrangement of the active arm, the passive arm and the two-force rod, and the lever is formed by the above structure, and the problem of high difficulty in adjusting the aluminum support is solved by utilizing the lever principle and the calipers; meanwhile, the problems that the side lug of the nut is easy to break, the support is easy to incline and the leveling is difficult are solved; the utility model discloses, can realize enlargiing of power, realize the light purpose that promotes the support of one hand.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a right side view of the structure of the present invention;

FIG. 3 is a schematic structural view of the clamp of the present invention when closed;

FIG. 4 is a schematic view of the caliper when open;

FIG. 5 is a simplified model diagram of the structure of the present invention;

FIG. 6 is a diagram of the analysis of the force applied to the active arm;

FIG. 7 is a force analysis diagram of a two-force lever;

FIG. 8 is a force analysis chart of the caliper;

FIG. 9 is a graph of caliper angle versus clamp force amplification.

Reference numerals: 1-an active arm; 2-footing; 3-a passive arm; 4-two force rod; 5-a caliper; 6, a push-pull rod; 7-a sleeve; 8-adjusting the nut; 9-an adjustable lead screw; 10-a push-pull block; 11-a limiting block; 12-a pin; 13-ribbed.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-4, a lever-type aluminum support auxiliary fastening device comprises a driving arm 1, a bottom foot 2, a driven arm 3, a two-force rod 4, calipers 5, a push-pull rod 6, a push-pull block 10, a limiting block 11 and a pin 12; one end of the two-force rod 4 is connected with the driven arm 3 through a pin 12, the other end of the two-force rod is connected with the caliper 5 through a pin 12, a push-pull rod 6 is arranged on the caliper 5, the push-pull rod 6 is used for opening or closing the caliper 5, a push-pull block 10 and a limiting block 11 are arranged on the push-pull rod 6, the push-pull block 10 can facilitate a worker to push the push-pull rod 6, and the limiting block 11 plays a role in preventing the push-pull rod 6 from slipping. The driven arm 3 is welded with the driving arm 1, the driving arm 1 is welded on the driven arm 3 through the bottom foot 2, and a reinforcing rib 13 is further fixed between the outer side wall of the bottom foot 2 and the driving arm 1.

The driving arm 1 is a steel pipe, the driven arm 3 is U-shaped steel, the bottom foot 2 is equilateral angle steel, and the three structures are welded into a whole. In order to prevent the welding part of the driving arm 1 from bending due to excessive bending moment, a reinforcing rib is welded at the welding part. The two-force rod 4 is a steel pipe, the caliper 5 is mainly formed by welding square pipes, and fixing holes are formed in two sides of the caliper 5; the push-pull rod 6 penetrates through the fixing hole, and the main part of the caliper 5 is welded into a C shape by a square tube. The push-pull rod 6 penetrates through the square tube, and the purpose of opening and closing the calipers 5 is achieved by pulling the push-pull rod 6 with one hand.

The working method comprises the following steps: the left hand holds the calipers 5, the right hand lifts the driving arm 1, and the driving arm is placed at a position where the distance between the adjustable lead screw 9 and the driving arm 1 is 6 cm-15 cm; pushing left by the left hand to make the caliper 5 lean against the support sleeve 7, pushing the push-pull rod 6 inwards to close the caliper 5; the right hand holds the tail end of the driving arm 1 and presses downwards, and meanwhile, the left hand rotates the adjusting nut 8 to be always contacted with the sleeve along with the lifting of the support; leveling the plane of the template to a proper position, and releasing pressure by the right hand; the left hand pulls back the push-pull rod 6, the caliper 5 opens and pushes the caliper 5 rightwards away from the sleeve 7, and the process is finished.

The part from the driving arm 1 to the driven arm 3 realizes the amplification of force by utilizing the length effect principle, and the support is easily lifted; by utilizing the angle effect principle, the sleeve is clamped by the caliper 5, so that the caliper 5 cannot slide.

(1) Structural force calculation

The model is simplified, the utility model is simplified as shown in fig. 5, and the model is simplified for the fastening device. Wherein the pole AC is long L₁The length L of the lever AB is the driving arm₁Is a passive arm; length L of pole BD₃Is a two-force rod; the DE section is a caliper.

(2) Calculation of active arm BAC stress

Taking the BAC section of the driving arm for stress analysis, wherein the AC section is the driving arm, the AB section is the driven arm, and the stress is shown in figure 6:

by sigma-M_A＝0F_BL₁-FL₂＝0

Obtaining by solution:

(3) force calculation for two-force rod BD

Taking the segment BD of the two-force rod for stress analysis, the stress is shown in FIG. 7:

by sigma F_y＝0F′_B-F_D＝0

Obtaining by solution:

(4) caliper EGD force calculation

Taking calliper EGD to carry out the atress analysis, the EG section is the bayonet socket position, and the DG section is the calliper connecting rod, and the atress is as shown in figure 8:

by sigma F_x＝0F_E＝F_G

∑M_G＝0F′_DL₄+F_fEd-F_Ed sinβ＝0

In addition: f_fE＝fF_E F_fG＝fF_G

Obtaining by solution:

by

Substituting the formula (2) into the formula to obtain:

F_fE＝F_fG＝fF_E＝fF_G＝ηF (6)

in the formula (I), the compound is shown in the specification,

is the magnification factor of the force.

When the device is determined by the structure size, the clamping force of the caliper clamping sleeve is only related to the included angle beta between the caliper and the horizontal plane. Order to

The clamping force amplification factor is shown, and the steel-aluminum friction coefficient f is found to be 0.17 by table lookup, then

As can be seen from FIG. 1, the angle β is 0 ≦ β < 90, and the clamp force magnification factor relationship is as shown in FIG. 9:

as shown in fig. 5, β is 0 ° ≦ β < 90 °, and γ has a maximum of 274.1 when β is 10 °. Thus, in manufacturing the fastening device, the maximum clamping force can be obtained by setting the caliper opening size such that when the caliper is clamped to the sleeve, the caliper is angled from the horizontal by 10 °.

The maximum weight that the structure can be pried up under a certain condition is calculated according to equation (6).

(1) Setting initial parameters

Steel-aluminum coefficient of friction: f is 0.17

Human arm strength: 15 kg-15 × 9.8-147N

Length of the passive arm: l is₁＝60mm

The horizontal projection length of the driving arm is as follows: l is₂＝1000mm

Caliper connecting arm length: l is₃＝100mm

Horizontal included angle of calipers: beta is 10 °

Supporting the outer diameter of the sleeve: d is 65mm

(2) Maximum pick calculation

Substituting the parameters into an equation (6) to obtain:

the maximum friction force between the caliper and the sleeve is N-2F_fE2 × 1053.85-2107.7 kN, which is far beyond the actual required load.

The initial load is amplified to by the driving arm and the driven arm

I.e. the load of this case is amplified to become N_{Amplification of}The final stage can increase the load magnification by increasing the length of the driving arm, when nF is 16.67 × 0.147, 2.45 kN.

The utility model provides a nut limit ear easy-to-break, support the problem of easy slope and leveling difficulty. Additionally, the utility model discloses utilize lever principle, can realize enlargeing of power, realize the purpose that the light promotion of one hand supported. The utility model discloses can fasten the support under the more laborsaving condition, can not cause the damage to the support again. In addition, the device has the characteristics of simple structure, convenience in operation and small occupied space, and is convenient to apply and popularize.

The present invention is not limited to the above embodiments, and based on the technical solutions disclosed in the present invention, those skilled in the art can make some replacements and transformations for some technical features without creative labor according to the disclosed technical contents, and these replacements and transformations are all within the protection scope of the present invention.

Claims

1. A lever type aluminum support auxiliary fastening device is characterized by comprising a driving arm, a bottom foot, a driven arm, a two-force rod and calipers; one end of the two-force rod is movably connected with the calipers, and the other end of the two-force rod is movably connected with the driven arm; the driven arm is fixed with a driving arm; a push-pull rod is arranged on the calipers; the push-pull rod is used for closing or opening the opening of the caliper; the caliper is adapted to be mounted on a bushing.

2. A lever type aluminum support auxiliary fastening device as claimed in claim 1, wherein a foot is fixed to the tail end of the driven arm; the driving arm is fixed on the bottom foot and the driven arm.

3. A lever type aluminium bracing auxiliary fastening device as claimed in claim 2, wherein a ribbed rib is also secured between the outer side wall of the foot and the driving arm.

4. A lever type aluminum support auxiliary fastening device as claimed in claim 1, wherein the caliper, the driven arm and the two-force rod are connected by a pin.

5. A lever type aluminum support auxiliary fastening device as claimed in claim 1, wherein the push-pull rod is provided with a push-pull block and a limiting block.

6. A lever type aluminum support auxiliary fastening device as claimed in claim 1, wherein fixing holes are provided at both sides of the caliper; the push-pull rod penetrates through the fixing hole.