CN219078876U

CN219078876U - Portal frame convenient to manual height-adjusting

Info

Publication number: CN219078876U
Application number: CN202220972693.0U
Authority: CN
Inventors: 王刚
Original assignee: Forcome Shanghai Co ltd
Current assignee: Forcome Shanghai Co ltd
Priority date: 2022-04-25
Filing date: 2022-04-25
Publication date: 2023-05-26
Anticipated expiration: 2032-04-25

Abstract

The utility model relates to a portal frame convenient for manually adjusting the height, which comprises two lifting bases and a cross beam, wherein each lifting base comprises a lifting rod, a sleeve, a supporting seat and a lifting mechanism, one end of the lifting rod is fixedly connected with the cross beam, the other end of the lifting rod is inserted into the sleeve, the lifting mechanism comprises a lifting rod, a hand pull rod, a limiting rod, a spring, a bolt and a lifting hook for hooking the bolt, a waist-shaped hole is formed in the sleeve along the length direction of the sleeve, a plurality of insertion holes for inserting the bolt are formed in the lifting rod along the length direction of the lifting rod at intervals, a limiting block is fixed on the sleeve, the middle part of the lifting rod is hinged on the sleeve through a lever fulcrum, the end part of the lifting rod is connected with the lifting hook, a sliding groove is formed in the lifting rod, the hand pull rod and the limiting rod are slidably arranged on the sliding groove, one end of the hand pull rod is fixedly connected with the limiting rod through a transmission rod, one end of the spring is connected with the limiting rod, and the other end of the hand pull rod is connected with the lever fulcrum, and the limiting block is arranged on the sleeve. Compared with the prior art, the utility model can temporarily lock the height, has simple and convenient operation, prevents falling and has high safety.

Description

Portal frame convenient to manual height-adjusting

Technical Field

The utility model relates to a portal frame, in particular to a portal frame convenient for manually adjusting the height.

Background

The hoisting portal frame is a hoisting auxiliary apparatus which is more commonly used in the process of assembling and transporting the workpiece of the heavy equipment. At present, a plurality of hoisting portal frames are fixed, and the width and the height of the hoisting portal frames cannot be adjusted, so that the hoisting portal frames cannot be used in specific occasions, such as in certain narrow spaces.

In the prior art, some solutions are also provided, chinese patent CN200720114839.3 proposes a portal frame column lifting device, each column is formed by sleeving two sections, namely, one section is a sleeve, the other section is a cannula, the cannula is inserted into the sleeve, and a plurality of adjusting holes distributed up and down are formed on the cannula.

But when using the hoisting device that this patent proposed, the lifting in-process operating personnel need hold the lever always, can not leave, can't liberate operating personnel's both hands, and is hard and the operation is inconvenient, has the risk of falling simultaneously.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the portal frame which is convenient for manually adjusting the height, can temporarily lock the height, is simple and convenient to operate, prevents falling and has high safety.

The aim of the utility model can be achieved by the following technical scheme:

the utility model provides a portal frame convenient to manual height-adjusting, includes two lifting base and is located the crossbeam between two lifting base, every lifting base include lifter, sleeve, supporting seat and lifting mechanism, lifter one end and crossbeam fixed connection, the other end inserts the sleeve, lifting mechanism include lifter, hand lever, gag lever post, spring, bolt and be used for hooking the lifting hook of bolt, the sleeve on open along its length direction and have waist type hole, the lifter on be equipped with a plurality of along its length direction interval and be used for inserting the jack of bolt, the stopper fix on the sleeve, the lifter middle part pass through lever fulcrum and articulate on the sleeve, the tip is connected with lifting hook, the lifter on be equipped with the spout, hand lever and gag lever post slide and set up on the spout, hand lever post pass through transfer line and gag lever post fixed connection, spring one end be connected with the gag lever post, the other end be equipped with the stopper that is used for blockking the gag lever post on the sleeve.

Further, the number of the bolts is not less than two.

Further, the lever fulcrum comprises a fixed base and a fixed rod, wherein the fixed base is fixed on the sleeve, the lifting rod is hinged on the fixed base through the fixed rod, and the end part of the spring is connected with the fixed rod.

Further, the end part of the lifting hook is hinged with the lifting rod.

Further, the lifting rod is U-shaped, and the lever fulcrum is hinged with two side edges of the lifting rod.

Further, the number of the springs is two, and the two springs are symmetrically arranged on two sides of the lever fulcrum.

Further, the number of the sliding grooves is two, and the two sliding grooves are symmetrically arranged on the two sides of the lifting rod.

Further, the end part of the hand pulling rod penetrates through the bottom of the sliding groove and is fixedly connected with the transmission rod, and the end part of the limiting rod penetrates through the bottom of the sliding groove and is fixedly connected with the transmission rod.

Further, an arc notch is arranged on the limiting block.

Further, the bottom of the supporting seat is provided with a pulley.

Compared with the prior art, the utility model has the following beneficial effects:

(1) The middle part of the lifting rod is hinged on the sleeve through the lever fulcrum, the end part of the lifting rod is connected with the lifting hook, the lifting rod is provided with the hand pull rod and the limiting rod in a sliding way, the hand pull rod is in transmission connection with the transmission rod, the limiting rod is connected with the lever fulcrum through the spring, the sleeve is provided with the limiting block for blocking the limiting rod, the bolt penetrates through the waist-shaped hole and the jack on the lifting rod, the positions of the lifting rod and the sleeve are relatively fixed, when the height of the cross beam is required to be increased, the lifting hook hooks the first bolt, the bottom of the lifting rod and the hand pull rod are firmly held at the moment, the hand pull rod drives the limiting rod to move, the spring is stretched, the bottom of the lifting rod is pressed at the moment, the lifting hook lifts the first bolt under the leverage, the first bolt moves along the length direction of the waist-shaped hole, the lifting rod is lifted, when the height of the limiting rod is lower than that of the limiting block, a worker releases the hand-pull rod, the spring drives the limiting rod to reset, then slowly releases the lifting rod, the bottom of the lifting rod is tilted until the limiting rod abuts against the bottom of the limiting block, at the moment, the position of the lifting rod is temporarily fixed, the sleeve and the lifting rod are temporarily fixed through the bolt, the lifting of the lifting base is completed once, so that the lifting base is reciprocally lifted gradually to the expected height, the lifting process of the portal frame can be temporarily locked to the height, and therefore hands of the worker are liberated, the operation of the worker is facilitated, the falling of the lifting base is prevented, and the safety is high;

(2) The number of the bolts is not less than two, so that the bolts are convenient to be used alternately when the height of the lifting base is adjusted;

(3) The end part of the lifting hook is hinged with the lifting rod, and the lifting hook can rotate relative to the lifting rod, so that the flexibility is high.

(4) The lifting rod is U-shaped, the lever fulcrum is hinged with two side edges of the lifting rod, the structural strength is high, and the lifting rod is convenient to hold and operate;

(5) The two springs are symmetrically arranged on two sides of the lever fulcrum, and the structure is stable.

(6) The two sliding grooves are symmetrically arranged on two side edges of the lifting rod, the hand pulling rod and the limiting rod are clamped between the two sliding grooves, the end part of the hand pulling rod penetrates through the bottom of the sliding groove and is fixedly connected with the transmission rod, the end part of the limiting rod penetrates through the bottom of the sliding groove and is fixedly connected with the transmission rod, the transmission rod plays a role in transmission, and meanwhile, the hand pulling rod and the limiting rod can be prevented from falling off, so that the lifting rod is convenient to disassemble and assemble;

(7) The limiting block is provided with the arc-shaped notch, and when the limiting block blocks the limiting rod, the limiting rod is positioned in the arc-shaped notch, so that slipping is prevented, and the safety is good.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the rear structure of the lifting mechanism;

FIG. 3 is a schematic elevational view of a lifting mechanism;

FIG. 4 is a schematic view of an exploded construction of the lifting mechanism;

the reference numerals in the figures illustrate:

1. the lifting device comprises a cross beam, a lifting rod, a sleeve, a supporting seat, a lifting mechanism, a pulley, a waist-shaped hole, a lifting rod, a hand pull rod, a limiting rod, a driving rod, a spring, a fixed base, a limiting block, a lifting hook, a bolt, a fixing rod, a sliding groove and an arc notch.

Detailed Description

The utility model will now be described in detail with reference to the drawings and specific examples. The present embodiment is implemented on the premise of the technical scheme of the present utility model, and a detailed implementation manner and a specific operation process are given, but the protection scope of the present utility model is not limited to the following examples.

Example 1

The utility model provides a portal frame convenient to manual height-adjusting, fig. 1, crossbeam 1 including two lift bases and between two lift bases, mountable calabash on crossbeam 1, as fig. 2, fig. 3 and fig. 4, every lift base includes lifter 2, sleeve 3, supporting seat 4 and lifting mechanism, lifter 2 one end and crossbeam 1 fixed connection, the other end inserts sleeve 3, lifting mechanism includes lifter 51, hand lever 52, gag lever post 53, spring 55, bolt 59 and be used for hooking the lift hook 58 of bolt 59, open along its length direction on sleeve 3 has waist type hole 31, be equipped with a plurality of jack that is used for inserting bolt 59 along its length direction interval on lifter 2, stopper 57 is fixed on sleeve 3, lifter 51 middle part articulates on sleeve 3 through the lever fulcrum, the tip is connected with lift hook 58, be equipped with spout 511 on the lifter 51, hand lever 52 and gag lever 53 slide and set up on spout 511, hand lever 52 passes through drive lever 54 and gag lever 53 fixed connection, spring 55 one end is connected with gag lever 53, the other end is equipped with stopper 57 that is used for stopping lever post 53 on the lever 3.

The lever fulcrum comprises a fixed base 56 and a fixed rod 60, the fixed base 56 is fixed on the sleeve 3, the lifting rod 51 is hinged on the fixed base 56 through the fixed rod 60, and the end part of the spring 55 is connected with the fixed rod 60.

The end of the lifting hook 58 is hinged with the lifting rod 51, and the lifting hook 58 can rotate relative to the lifting rod 51, so that the flexibility is high.

The lifting rod 51 is U-shaped, the lever fulcrum is hinged with two side edges of the lifting rod 51, the structural strength is high, and the lifting rod is convenient to hold and operate.

The number of the springs 55 is two, the two springs 55 are symmetrically arranged on two sides of the lever fulcrum, and the structure is stable.

The number of the sliding grooves 511 is two, the two sliding grooves 511 are symmetrically arranged on two side edges of the lifting rod 51, and the hand pulling rod 52 and the limiting rod 53 are clamped between the two sliding grooves 511.

The end of the hand-pulling rod 52 passes through the bottom of the chute 511 and is fixedly connected with the transmission rod 54, the end of the limit rod 53 passes through the bottom of the chute 511 and is fixedly connected with the transmission rod 54, the transmission rod 54 plays a role in transmission, and the hand-pulling rod 52 and the limit rod 53 can be prevented from falling off.

As shown in fig. 2 and 3, the limiting block 57 is provided with an arc notch 571, and when the limiting block 57 blocks the limiting rod 53, the limiting rod 53 is located in the arc notch 571, so that slipping is prevented, and safety is good.

The number of the bolts 59 is two, namely a first bolt and a second bolt, and the bolts are alternately used when the height of the lifting base is adjusted.

The portal frame convenient for manual height adjustment provided by the embodiment is used as follows:

the first bolt sequentially passes through the waist-shaped hole 31 and the jack on the lifting rod 2, the positions of the lifting rod 2 and the sleeve 3 are relatively fixed, when the height of the cross beam 1 needs to be increased, the lifting hook 58 hooks the first bolt, an operator holds the bottom of the U-shaped lifting rod 51 and the hand pull rod 52 by hand at the moment and holds the first bolt tightly with force, the hand pull rod 52 drives the limiting rod 53 to move through the transmission rod 54, the spring 55 is stretched, the bottom of the U-shaped lifting rod 51 is pressed down at the moment, the lifting hook 58 lifts the first bolt under the leverage, the first bolt moves along the length direction of the waist-shaped hole 31, the lifting rod 2 is lifted, when the height of the limiting rod 53 is lower than the height of the limiting block 57, the worker releases the hand pull rod 52, the spring 55 drives the limiting rod 53 to reset, then slowly releases the limiting rod 51, the bottom of the lifting rod 51 is tilted until the limiting rod 53 is propped against the bottom of the limiting block 57, at the moment, the position of the lifting rod 2 is temporarily fixed, the second bolt is inserted into the jack below the first bolt, the first bolt is lifted up under the second bolt is lifted, and the second bolt is pulled up, and the step is continued if the first bolt is pulled out.

The process of lowering the height of the lifting rod 2 is the same as the process of raising the height of the lifting rod 2.

Example 2

In this embodiment, as shown in fig. 1, a pulley 6 is disposed at the bottom of the supporting seat 4, so as to facilitate moving the gantry. Otherwise, the same as in example 1 was used.

Embodiment 1 and embodiment 2 propose a portal frame convenient to manual height-adjusting utilizes lever principle to adjust the height, have the function of temporarily locking and preventing falling simultaneously, the operation of being convenient for, the security is high.

The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. The portal frame is characterized by comprising two lifting bases and a cross beam (1) positioned between the two lifting bases, wherein each lifting base comprises a lifting rod (2), a sleeve (3), a supporting seat (4) and a lifting mechanism, one end of the lifting rod (2) is fixedly connected with the cross beam (1), the other end of the lifting rod is inserted into the sleeve (3), the lifting mechanism comprises a lifting rod (51), a hand pull rod (52), a limiting rod (53), a spring (55), a bolt (59) and a lifting hook (58) for hooking the bolt (59), the sleeve (3) is provided with a waist-shaped hole (31) along the length direction of the sleeve, a plurality of jacks for inserting the bolt (59) are arranged on the lifting rod (2) at intervals along the length direction of the lifting rod, the middle part of the lifting rod (51) is hinged on the sleeve (3) through a lever fulcrum, the end of the lifting rod is connected with the lifting hook (58), a sliding groove (511) is formed in the lifting rod (51), the hand pull rod (52) and the limiting rod (53) are arranged on the sliding groove (53), the hand pull rod (52) is connected with the other end of the limiting rod (53) through the spring (511), the sleeve (3) is provided with a limiting block (57) for blocking the limiting rod (53), and the limiting block (57) is fixed on the sleeve (3).

2. A portal frame for facilitating manual height adjustment according to claim 1, wherein the number of pins (59) is not less than two.

3. The portal frame with the height convenient to manually adjust according to claim 1, wherein the lever fulcrum comprises a fixed base (56) and a fixed rod (60), the fixed base (56) is fixed on the sleeve (3), the lifting rod (51) is hinged on the fixed base (56) through the fixed rod (60), and the end part of the spring (55) is connected with the fixed rod (60).

4. A portal frame for facilitating manual height adjustment according to claim 1, wherein the end of the lifting hook (58) is hinged to the lifting rod (51).

5. The portal frame for facilitating manual height adjustment according to claim 1, wherein the lifting rod (51) is U-shaped, and the lever fulcrum is hinged to two sides of the lifting rod (51).

6. The portal frame for facilitating manual height adjustment according to claim 5, wherein the number of the springs (55) is two, and the two springs (55) are symmetrically arranged at two sides of the lever fulcrum.

7. The portal frame for facilitating manual height adjustment according to claim 5, wherein the number of the sliding grooves (511) is two, and the two sliding grooves (511) are symmetrically arranged on two sides of the lifting rod (51).

8. The portal frame for facilitating manual height adjustment according to claim 7, wherein the end of the hand lever (52) passes through the bottom of the chute (511) and is fixedly connected with the driving rod (54), and the end of the limit lever (53) passes through the bottom of the chute (511) and is fixedly connected with the driving rod (54).

9. The portal frame for facilitating manual height adjustment according to claim 1, wherein the limiting block (57) is provided with an arc-shaped notch (571).

10. The portal frame for facilitating manual height adjustment according to claim 1, wherein the pulley (6) is arranged at the bottom of the supporting seat (4).