CN110512350B

CN110512350B - Bending-proof device for super-long moving beam

Info

Publication number: CN110512350B
Application number: CN201910687952.8A
Authority: CN
Inventors: 孟婥; 郝志昌; 刘洋; 张玉井
Original assignee: Hunan Xinhai Co ltd; Donghua University
Current assignee: Hunan Xinhai Co ltd; Donghua University
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2021-10-26
Anticipated expiration: 2039-07-29
Also published as: CN110512350A

Abstract

The invention discloses an anti-bending device for an overlong moving beam, which is characterized by comprising an overlong moving beam, wherein two ends of the overlong moving beam are supported on a lower hook rail through bearings, a lower hook moving motor for driving a lower hook moving connecting rod to enable the overlong moving beam to do reciprocating motion along the lower hook rail is arranged on the outer side of the lower hook rail, a lower hook pressing plate is arranged at the front end of the overlong moving beam, a lower hook is arranged on the lower hook pressing plate, channel steel is fixed on the overlong moving beam, the channel steel is connected with an anti-bending rotating shaft capable of rotating in a fixing frame through at least one set of connecting rod mechanism, the anti-bending rotating shaft is connected with square steel through at least 2 fixing frames, and the square steel is fixed on a rack. The device of the invention connects the overlength moving beam with the rotating shaft with large diameter and high torsional rigidity by installing the connecting rod mechanism, thereby achieving the purpose of reducing the middle bending of the beam, and simultaneously, the dynamic support characteristic of the connecting rod mechanism can not influence the beam to do space movement. The device of the invention eliminates the problem that the overlong moving beam is simply supported by two ends and generates bending deformation in the middle.

Description

Bending-proof device for super-long moving beam

Technical Field

The invention relates to knotted net weaving equipment, in particular to an ultralong moving beam bending prevention device, and belongs to the technical field of high-end textile equipment.

Background

In textile machinery, machines with longer width (6M) are numerous, some weaving piece mounting cross beams used for matching key weaving pieces are often simply supported on two sides of an overlong moving cross beam due to the relation between movement and space, so that the 6M long cross beam bends to about 60mm (without transverse constraint) or about 10mm (with transverse constraint) in the middle under the action of self weight, the deformation is too large, the matching between weaving pieces is influenced, and the deformation of the cross beam needs to be reduced by corresponding measures.

The lower hooks of the knotting net knitting machine reach more than 400 in number and are arranged on the cross beam, so that the length of the cross beam exceeds 6 meters. According to the requirement of the knotted net production process, after the upper hook completes looping movement of the warps, the lower hook moves upwards along the lower hook tracks on the two sides, penetrates through the warp loops, hooks the warps and returns to complete the yarn hooking movement. In the movement, the beam does space movement along the fixed track, only the two ends are simply supported, the middle part is in a suspended state, no space is provided for static support of the beam, the middle part of the beam is prone to dropping, and all the lower hooks are not on the same horizontal plane. The curved cross member may affect the engagement of the upper hook, the lower hook and the comb hook, resulting in a knot failure.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the problem of how to make overlength motion crossbeam reduce the deformation is solved.

In order to solve the technical problem, the technical scheme of the invention is to provide an anti-bending device for an ultra-long moving beam, which is characterized by comprising the ultra-long moving beam, wherein two ends of the ultra-long moving beam are supported on a lower hook rail through bearings, a lower hook moving motor for driving a lower hook moving connecting rod to enable the ultra-long moving beam to reciprocate along the lower hook rail is arranged on the outer side of the lower hook rail, a lower hook pressing plate is arranged at the front end of the ultra-long moving beam, a lower hook is arranged on the lower hook pressing plate, channel steel is fixed on the ultra-long moving beam, the channel steel is connected with an anti-bending rotating shaft capable of rotating in a fixing frame through at least one set of connecting rod mechanism, the anti-bending rotating shaft is connected with square steel through at least 2 fixing frames, and the square steel is fixed on a rack.

Preferably, each set of link mechanism comprises joint bearing, joint bearing connecting rod and bending-resistant rotating shaft swing arm, one end of the bending-resistant rotating shaft swing arm is fixedly connected with the bending-resistant rotating shaft, the other end of the bending-resistant rotating shaft swing arm is connected with one end of the joint bearing connecting rod through the joint bearing, and the other end of the joint bearing connecting rod is connected with the channel steel.

Preferably, the bending-resistant rotating shaft is a seamless steel pipe with large diameter and high torsional rigidity.

Preferably, one end of the connecting rod mechanism is connected with the channel steel through a revolute pair.

The device of the invention connects the overlength moving beam with the rotating shaft with large diameter and high torsional rigidity by installing the connecting rod mechanism, thereby achieving the purpose of reducing the middle bending of the beam, and simultaneously, the dynamic support characteristic of the connecting rod mechanism can not influence the beam to do space movement. The device of the invention eliminates the problem that the overlong moving beam is simply supported by two ends and generates bending deformation in the middle.

The mechanism of the invention has simple composition, convenient disassembly, low maintenance cost and high reliability; the high torsional rigidity of the bending-resistant rotating shaft can greatly reduce the middle bending degree of the overlong moving beam and ensure the quality of the fabric; when the local part of the overlong moving beam is bent, the defect can be eliminated by adjusting the length of the connecting rod for the bearing of the connecting rod mechanism; the dynamic support characteristic of the bending prevention device cannot influence the spatial motion of the overlong motion beam, and the time sequence of the process is guaranteed.

Drawings

FIG. 1 is an isometric view of an ultra-long moving beam anti-bow device;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a drive diagram of the ultra-long moving beam;

FIG. 4 is a schematic view of the mid-bend of the super-long moving beam;

fig. 5 is a bending-resistant schematic diagram of an ultra-long moving beam bending-resistant device.

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

Example 1

The invention relates to an anti-bending device for an ultra-long moving beam, which is composed of an ultra-long moving beam 1, a connecting rod mechanism 2, an anti-bending rotating shaft 3, a fixed frame 4 and square steel 5 as shown in figures 1-3; the length of the overlength movement beam 1 is more than 6 meters, two ends of the overlength movement beam are simply supported and supported on the lower hook rail 13 through bearings, the lower hook movement motor 15 drives the lower hook movement connecting rod 14 to enable the overlength movement beam 1 to do reciprocating movement along the lower hook rail 13, and the lower hook movement motor 15 is arranged on the outer side of the lower hook rail 13. The front end of the overlength moving beam 1 is provided with a lower hook 9 through a lower hook pressing plate 8, as shown in figures 1-3.

The link mechanism 2 has 5 sets, each set of link mechanism 2 consists of a joint bearing, a connecting rod for the joint bearing and a bending-resistant rotating shaft swing arm, one end of the bending-resistant rotating shaft swing arm is fixedly connected with the bending-resistant rotating shaft 3, the other end of the bending-resistant rotating shaft swing arm is connected with one end of the connecting rod for the joint bearing through the joint bearing, and the other end of the connecting rod for the joint bearing is connected with the channel steel 7. One end of the connecting rod mechanism 2 is connected with a channel steel 7 on the overlong moving beam 1 through a revolute pair, the other end of the connecting rod mechanism is fixedly connected with the bending-resistant rotating shaft 3, and the channel steel 7 is installed on the overlong moving beam 1 through a countersunk screw. The bending-resistant rotating shaft 3 is a seamless steel pipe with large diameter and high torsional rigidity, the bending-resistant rotating shaft 3 is connected with the square steel 5 through 5 fixing frames 4, the square steel 5 is installed on the rack 6 and is stationary, and the bending-resistant rotating shaft 3 can rotate in the fixing frames 4.

It can be known from material mechanics that two ends of the ultra-long moving beam 1 are simply supported, and the middle suspended position under the influence of gravity can generate large bending which can reach about 60mm, as shown in fig. 4, and the dotted line indicates the bending state 12 of the ultra-long moving beam. In textile machinery, especially for knotted net knitting machines, the deformation of the overlong moving beam 1 is related to the moving track of the lower hook, and the quality of a product is directly influenced. The bending-prevention device not only can effectively solve the problem, but also can ensure that the movement of the cross beam is not influenced. The overlength moving beam 1 is arranged between the lower hook rails 13 at two ends to ensure the straightness of the overlength moving beam 1, and then 5 sleeve connecting rod mechanisms 2 are arranged to be fastened on the bending-resistant rotating shaft 3 above.

The principle of straightening the ultra-long moving beam 1 by using the multi-set linkage 2 is shown in fig. 5.

When a certain point A in the middle of the ultra-long moving beam 1 descends in a bending mode, two sets of link mechanisms (a left link mechanism 10 and a right link mechanism 11) adjacent to the point A also descend in a small range, the left link mechanism 10 and the right link mechanism 11 can drive the bending-resistant rotating shaft 3 to have a rotating trend at a point B and a point C, but because two sides of the ultra-long moving beam 1 are simply supported and basically have no bending, the link mechanisms 2 connected with the two sides do not drive the bending-resistant rotating shaft 3 to rotate. And the bending-resistant rotating shaft 3 is made of a seamless steel pipe with large diameter and high torsional rigidity, so that the bending deformation is basically avoided, the bending of the middle section of the cross beam is restrained, and the straightening effect of the cross beam is achieved.

Example 2

In this embodiment, the link mechanism 2 is provided with one set. The bending-resistant rotating shaft 3 is connected with the square steel 5 through 2 fixing frames 4. The rest is the same as in example 1.

Claims

1. The bending prevention device for the overlong moving beam is characterized by comprising the overlong moving beam (1), wherein two ends of the overlong moving beam (1) are supported on a lower hook rail (13) through bearings, a lower hook moving motor (15) for driving a lower hook moving connecting rod (14) to enable the overlong moving beam (1) to do reciprocating motion along the lower hook rail (13) is arranged on the outer side of the lower hook rail (13), a lower hook pressing plate (8) is arranged at the front end of the overlong moving beam (1), a lower hook (9) is arranged on the lower hook pressing plate (8), channel steel (7) is fixed on the overlong moving beam (1), the channel steel (7) is connected with a bending-resistant rotating shaft (3) capable of rotating in a fixing frame (4) through at least one set of connecting rod mechanism (2), the bending-resistant rotating shaft (3) is connected with square steel (5) through at least 2 fixing frames (4), and the square steel (5) is fixed on a rack (6); each set of link mechanism (2) constitute by joint bearing, connective bar for joint bearing and bending-resistant pivot swing arm, the one end and the bending-resistant pivot (3) fixed connection of bending-resistant pivot swing arm, the other end of bending-resistant pivot swing arm is connected with the one end of connective bar for joint bearing through joint bearing, is connected through the revolute pair between the other end of connective bar for joint bearing and channel-section steel (7).

2. The bending prevention device for the overlong moving beam as claimed in claim 1, wherein the bending-resistant rotating shaft (3) is a seamless steel pipe with large diameter and high torsional rigidity.