CN210848086U

CN210848086U - Folding leg mechanism for web member of steel bar truss

Info

Publication number: CN210848086U
Application number: CN201921905716.0U
Authority: CN
Inventors: 唐学宾; 金年
Original assignee: Hunan Zhongzhiqiang Building Materials Co ltd
Current assignee: Hunan Kebao New Energy Group Co.,Ltd.
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2020-06-26
Anticipated expiration: 2029-11-07

Abstract

Steel bar truss web member rolls over foot mechanism relates to truss production technical field, and it includes the frame and rack-mounted clamping mechanism, actuating mechanism and dabber of bending, the dabber is located between two web members of truss, clamping mechanism compresses tightly the seat including the symmetry setting two in the truss both sides, compress tightly the seat and articulate in the frame, the medial surface that compresses tightly the seat is installed and is supported the web member tightly at the epaxial compact heap of dabber, the mechanism of bending includes two swing arms, the swing arm is including rotationally connecting the cam in the frame, connecting in the upper end and the upper end of cam and being the contained angle, the upper end is installed and is stretched into the piece of bending between two web members, the cam is located the inboard that compresses tightly the seat. The utility model discloses only drive whole mechanism through an hydro-cylinder and accomplish web member and roll over foot process, improve the production qualification rate of product, avoid the trouble problem of frequently sending out that leads to because of the drive of many hydro-cylinders.

Description

Folding leg mechanism for web member of steel bar truss

Technical Field

The utility model relates to a truss production technical field especially indicates a steel bar truss web member rolls over foot mechanism.

Background

The steel bar truss is a three-dimensional truss product which is mostly of a triangular structure and is formed by welding steel bars, and has the advantages of good stability, strong rigidity, stable and reliable quality and the like. The steel bar truss comprises an upper chord rib and two lower chord ribs, the upper chord rib and the two lower chord ribs are welded together through a web member steel bar which is bent into a wave shape, the upper chord rib is welded with wave crests of the two web members, two sides of the middle waist of the two web members are welded with the two lower chord ribs respectively, and in order to enable the bottom of the steel bar truss and a steel plate to be welded firmly in the subsequent processing process, the web members are usually subjected to foot folding processing, so that the corners of the lower ends of the web members are bent outwards and are in a flat state.

Chinese patent CN105127327 discloses a steel bar corner bending device, which compresses web members from two sides by two compressing cylinders, and drives swing arms to swing by two swing arm cylinders simultaneously, so that a bending block moves outwards to push against the bottoms of the web members, thereby completing the process of bending legs of the web members. The disadvantages of this device are: the two swing arm oil cylinders must synchronously execute actions, if one of the two swing arm oil cylinders has the problem of execution error or delay, the bending angle of the two web members is asymmetric, so that the quality of a product is seriously influenced, rework cannot be performed after the situation occurs, the product can only be listed as an unqualified product, and secondly, the four oil cylinders are installed and used in the device, so that the overall structure is complex, the failure frequency is relatively high, and the difficulty of subsequent maintenance work is increased.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steel bar truss web member rolls over foot mechanism only drives whole mechanism through an hydro-cylinder and accomplishes the web member and roll over the foot process, improves the production qualification rate of product, avoids the frequent problem of trouble because of many hydro-cylinders drive leads to.

In order to solve the technical problem, the utility model discloses a following technical scheme: the utility model provides a steel bar truss web member rolls over foot mechanism, includes the frame and installs clamping mechanism, the mechanism of bending, actuating mechanism and dabber in the frame, the dabber is located between two web members of truss.

The clamping mechanism comprises two pressing seats symmetrically arranged on two sides of the truss, the pressing seats are hinged to the rack, and pressing blocks capable of abutting the web members on the core shafts are mounted on the inner side surfaces of the pressing seats.

The mechanism of bending includes two swing arms, the swing arm is including rotationally connecting the cam in the frame, connecting in the cam and being the upper end and the upper end of contained angle, the upper end is installed and is stretched into the piece of bending between two web members, the cam is located the inboard that compresses tightly the seat, works as when the swing arm swings, thereby the cam can push away and support and compress tightly the seat and make it inclines to compress tightly the seat, and then makes the compact heap supports tightly the web member, mutually noninterfere when two swing arms are cross arrangement and motion.

The driving mechanism comprises an oil cylinder installed on the rack, a piston rod of the oil cylinder can move in the vertical direction, a push plate is fixedly installed at the top end of the oil cylinder, two parallel sliding grooves are horizontally formed in the top of the push plate, and the lower end portions of the two swing arms are respectively connected with one of the sliding grooves in a sliding mode.

Preferably, the pressing seat is connected with the rack through an eccentric shaft, the eccentric shaft is located on the inner side of the gravity center of the pressing seat, and a supporting block is arranged below the pressing seat.

More preferably, the spout is T type groove, the tip wears to be equipped with the sliding shaft with T type groove matched with down, the both ends of sliding shaft stretch into the both sides in T type groove just the sliding shaft can follow T type groove and slide.

More preferably, both ends of the sliding groove extend to both ends of the push plate respectively and are open.

More preferably, the length of the lower end portion is greater than the length of the upper end portion.

The utility model discloses a theory of operation is: after the truss feeds towards the foot folding mechanism, the web members are located on two sides of the mandrel, the oil cylinder is started at the moment, a piston rod of the oil cylinder upwards pushes the push plate, the swing arm is pushed against by the push plate, the bottom end of the lower end portion moves along the corresponding sliding groove, so that swinging movement of the swing arm is achieved, meanwhile, the cam rotates along with the swing arm and pushes against the inner side face of the corresponding pressing seat, the upper end of the pressing seat inclines towards the inner side, the pressing block is driven to gradually push the web members against the mandrel, the piston rod of the oil cylinder in the process continuously rises, the swing arm swings (when the web members are pressed against the mandrel, a critical contact point is achieved between the cam and the pressing seat, the cam keeps in contact with the web members in the rotating process, the pressing seat cannot further rotate), and accordingly, the bending block at the upper end portion swings outwards and folds the web members.

The leg folding mechanism is used for folding the leg of the steel bar truss web member, the process can be completed only by using one oil cylinder, the problems that the leg folding caused by the fact that a plurality of oil cylinders are not synchronous in execution, products are not qualified and the like are reduced to a great extent, the production yield of the products is improved, and the problems that a system is complex and faults are frequent due to the driving of a plurality of oil cylinders are avoided.

Drawings

Fig. 1 is a schematic overall structure diagram in an embodiment of the present invention;

FIG. 2 is a schematic view of the overall structure of the truss web member after the legs are folded in the embodiment;

FIG. 3 is an enlarged schematic view of the structure at A in FIG. 2;

FIG. 4 is a schematic diagram of the position relationship between the lower end portion and the sliding groove in the embodiment.

The reference signs are:

1-frame 2-mandrel 3-web member

4-pressing seat 4 a-pressing block 4 b-eccentric shaft

4c supporting block 5 oil cylinder 6 push plate

6 a-chute 7-bending block 8 a-cam

8 b-upper end 8 c-lower end 8 d-sliding shaft.

Detailed Description

In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.

It should be noted that, in the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Furthermore, in the present disclosure, unless explicitly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature. The terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-2, the web member leg folding mechanism of the steel bar truss comprises a frame 1, and a clamping mechanism, a bending mechanism, a driving mechanism and a mandrel 2 which are arranged on the frame 1, wherein the mandrel 2 is positioned between two web members 3 of the truss; the clamping mechanism comprises two pressing seats 4 symmetrically arranged at two sides of the truss, the pressing seats 4 are hinged to the rack 1, and pressing blocks 4a capable of tightly pressing the web members 3 on the core shaft 2 are arranged on the inner side surfaces of the pressing seats 4; the bending mechanism comprises two swing arms, each swing arm comprises a cam 8a rotatably connected to the rack 1, an upper end portion 8b connected to the cam 8a and forming an included angle, and a lower end portion 8c, the upper end portion 8b is provided with a bending block 7 extending into the space between the two web members 3, the cam 8a is positioned on the inner side of the pressing seat 4, when the swing arms swing, the cam 8a can push and abut against the pressing seat 4, so that the pressing seat 4 inclines, the pressing blocks 4a abut against the web members 3, and the two swing arms are arranged in a crossed manner and do not interfere with each other when moving; the driving mechanism comprises an oil cylinder 5 installed on the rack 1, a piston rod of the oil cylinder 5 can move in the vertical direction, a push plate 6 is fixedly installed at the top end of the oil cylinder 5, two parallel sliding grooves 6a are horizontally formed in the top of the push plate 6, and the lower end portions 8c of the two swing arms are respectively in sliding connection with one of the sliding grooves 6 a.

When the web member leg folding mechanism for the steel bar truss provided by the above embodiment works, firstly, after the truss is fed to the leg folding mechanism, the web members 3 are located at two sides of the mandrel 2 (as shown in fig. 1), at this time, the oil cylinder 5 is started, and in the process that the piston rod of the oil cylinder 5 pushes the push plate 6 upwards, the swing arm is pushed by the push plate 6, so that the bottom end of the lower end portion 8c moves along the corresponding sliding groove 6a to realize the swing action of the swing arm, and at the same time, the cam 8a rotates along with the oil cylinder and pushes against the inner side surface of the corresponding pressing seat 4, so that the upper end of the pressing seat 4 inclines inwards, thereby driving the pressing block 4a to gradually push the web member 3 against the mandrel 2, in the process, the piston rod of the oil cylinder 5 continuously rises, the swing arm swings (when the web member 3 is pressed against the mandrel 2, the critical contact point between the cam 8a and the pressing seat 4 is reached, and the cam 8a keeps in, thereby causing the bending piece 7 of the upper end portion 8b to swing outward and leg-folding the web member 3 (as shown in fig. 2).

Through the foot folding mechanism, the foot folding of the steel bar truss web member 3 is carried out, the process can be completed only by using one oil cylinder 5, the problems that the foot folding caused by the asynchronous execution of a plurality of oil cylinders 5 is not finished, products are unqualified and the like are reduced to a great extent, the production yield of the products is improved, and the problems of system complexity and frequent faults caused by the driving of a plurality of oil cylinders are also avoided.

Preferably, the pressing base 4 is connected with the frame 1 through an eccentric shaft 4b, the eccentric shaft 4b is located on the inner side of the gravity center of the pressing base 4, and a supporting block 4c is arranged below the pressing base 4, so that after the bending process is completed, the pressing base 4 can be easily returned, specifically, in the process that a piston rod of the oil cylinder 5 drives the push plate 6 to move downwards, the swing arm swings in the opposite direction, so that the cam 8a is gradually separated from the pressing base 4, and because the gravity center of the pressing base 4 is located on the outer side of the eccentric shaft 4b, the pressing base 4 can be inclined outwards under the action of self gravity until the lower end of the pressing base falls on the supporting block 4c, and the resetting of the pressing base 4.

More preferably, as shown in fig. 3-4, the sliding groove 6a is a T-shaped groove, the lower end portion 8c is provided with a sliding shaft 8d which is matched with the T-shaped groove, two ends of the sliding shaft 8d extend into two sides of the T-shaped groove, and the sliding shaft 8d can slide along the T-shaped groove, wherein two ends of the sliding groove 6a respectively extend to two ends of the push plate 6 and are open, and since the oil cylinder 5 controls the movement of the swing arm, there is no need to worry about that the sliding shaft 8d slips out of the sliding groove 6a, and on the contrary, the sliding groove 6a with two open ends is provided, which can facilitate the sliding shaft 8d to be matched and installed in the sliding groove 6 a.

It should be understood by those skilled in the art that although the two swing arms are arranged in a crossed manner, the two swing arms do not interfere with each other during movement, so that the bending blocks 7 on each swing arm can be arranged in a form of consistent length and alignment, because the width of the to-be-bent part of the web member 3 is not large, the two bending blocks 7 can be aligned and aligned by extending a small distance towards different ends, and because the extending length is not large, the stability of the bending blocks 7 can be maintained, so that the symmetrical positions of the web members 3 on two sides can be stressed simultaneously during bending, and the integrity of the leg bending of the web member is ensured.

In addition, in the present embodiment, the length of the lower end portion 8c is larger than the length of the upper end portion 8 b.

The above-mentioned embodiment is the utility model discloses the implementation scheme of preferred, in addition, the utility model discloses can also realize by other modes, any obvious replacement is all within the protection scope of the utility model under the prerequisite that does not deviate from this technical scheme design.

In order to make it easier for those skilled in the art to understand the improvement of the present invention over the prior art, some drawings and descriptions of the present invention have been simplified, and in order to clarify, some other elements have been omitted from this document, those skilled in the art should recognize that these omitted elements may also constitute the content of the present invention.

Claims

1. Steel bar truss web member rolls over foot mechanism includes frame (1) and installs clamping mechanism, the mechanism of bending, actuating mechanism and dabber (2) in frame (1), its characterized in that:

the mandrel (2) is positioned between the two web members (3) of the truss;

the clamping mechanism comprises two pressing seats (4) symmetrically arranged on two sides of the truss, the pressing seats (4) are hinged to the rack (1), and pressing blocks (4 a) capable of enabling the web members (3) to be tightly abutted to the core shaft (2) are arranged on the inner side surfaces of the pressing seats (4);

the bending mechanism comprises two swing arms, each swing arm comprises a cam (8 a) rotatably connected to the rack (1), an upper end portion (8 b) and a lower end portion (8 c), the upper end portion (8 b) is connected to the cam (8 a) and forms an included angle, a bending block (7) extending into the space between the two web members (3) is installed on the upper end portion (8 b), the cam (8 a) is located on the inner side of the pressing seat (4), when the swing arms swing, the cam (8 a) can push against the pressing seat (4) to enable the pressing seat (4) to incline, the pressing block (4 a) is further enabled to abut against the web members (3), and the two swing arms are arranged in a crossed mode and do not interfere with each other when moving;

the driving mechanism comprises an oil cylinder (5) arranged on the rack (1), a piston rod of the oil cylinder (5) can move along the vertical direction, a push plate (6) is fixedly arranged at the top end of the oil cylinder, two parallel sliding grooves (6 a) are horizontally formed in the top of the push plate (6), and the lower end parts (8 c) of the two swing arms are respectively connected with one sliding groove (6 a) in a sliding manner;

in the process that a piston rod of the oil cylinder (5) upwards pushes the push plate (6), the bottom end of the lower end part (8 c) moves along the corresponding sliding groove, so that the swing arm swings, under the pushing and abutting action of the cam (8 a), the pressing seat (4) inclines to enable the pressing block (4 a) to gradually abut against the web member (3), and meanwhile, the bending block (7) outwards swings and bends the web member (3).

2. The steel bar truss web member leg folding mechanism according to claim 1, wherein: the pressing seat (4) is connected with the rack (1) through an eccentric shaft (4 b), the eccentric shaft (4 b) is located on the inner side of the gravity center of the pressing seat (4), and a supporting block (4 c) is arranged below the pressing seat (4).

3. The steel bar truss web member leg folding mechanism according to claim 2, wherein: spout (6 a) are T type groove, lower tip (8 c) wear to be equipped with T type groove matched with slide axle (8 d), the both sides that stretch into T type groove just at the both ends of slide axle (8 d) can be followed T type groove and slided.

4. The steel bar truss web member leg folding mechanism according to claim 3, wherein: the two ends of the sliding groove (6 a) respectively extend to the two ends of the push plate (6) and are open.

5. The steel bar truss web member leg folding mechanism according to claim 4, wherein: the length of the lower end part (8 c) is greater than that of the upper end part (8 b).