CN102992099A - Lever device with adjustable moment arm - Google Patents

Abstract

The invention relates to a lever device with adjustable force arm, which is mainly composed of a slide bar (7), a slideway (5), a lever (3), and an adjustable fulcrum bracket (2). The slide bar (7) and the slideway ( 5) Form a fixed frame, one end of the lever (3) is hinged to the active slider (1), the active slider (1) is slidingly connected with the slider (7), the middle section of the lever (3) has a sliding groove, and the fulcrum that matches it slides The block (6) is hinged on one end of the adjustable fulcrum bracket (2), the other end of the adjustable fulcrum bracket (2) is fixed on the solid slide rod (7), and the sliding column of the passive slider (4) is stuck on the lever (3 ) in the sliding groove at the other end, and the sliding track (5) is in the sliding groove of the passive slider (4). The invention changes the length of the moving end of the lever by changing the position of the fulcrum of the lever, and has the characteristics of high test accuracy, stable performance, repeatable operation, simple operation, wide applicability, etc., and can be used for the horizontal motion proportional lever of the rope drum winding machine It is used in the device to change the length of the winding paper roll, etc.

Description

A lever device with adjustable force arm

technical field

The invention relates to the field of mechanical transmission, and relates to a lever device with an adjustable force arm, in particular to a lever device with an adjustable force arm suitable for a yarn guide power transmission device of a textile winding machine.

Background technique

The motion mechanism with adjustable stroke, in the textile machinery, the yarn guide movement in which the drum is directly in contact with the roller is used, and the length of the winding bobbin is controlled by changing the drum, so the yarn guide when working with a drum of uniform size The stroke is fixed, and if the stroke is required, the groove cylinder needs to be replaced. It cannot be completed without stopping the machine. At present, the adjustment of the yarn guide motion in the market requires a special fixed-length mechanism. The most advanced winding machine manufacturers such as Savio orion and Schlafhorst series automatic winding All the machines use uniform stroke yarn guides and are equipped with a length-fixing device to control the winding length. In my country's current patents, there are inventions and utility model patents for various length-fixing devices, but they are all aimed at the length-fixing device itself. The adjustment of the rollers between the inactive rest position and the active position provides two different weft yarns of fixed length to the weft guide of the multi-thread loom. The patents on yarn guides are mostly inventions and utility models related to the various structures of yarn guides. For example, patents 94192477.7 and 96195793.X are all about multifunctional yarn guides, which can be clamped or move along multiple axes. The patented transition mechanism that combines the tank and the lengthening device into one. In addition, the groove drum needs to have good heat conduction and anti-static functions to ensure the winding quality and reduce errors, so the production cost is relatively high.

Contents of the invention

The technical problem to be solved by the present invention is to provide a stable, reliable, convenient and efficient yarn guide transmission mechanism to adapt to the current multi-motor control winding machine technology, without changing the groove drum, and realize the non-stop state by simple mechanism movement The change of the yarn guide stroke under.

The technical solution adopted by the present invention to solve the technical problem is: to provide a simple lever combination device to adjust the traversing movement stroke of the yarn guide. The lever principle is used to apply power to the fixed end of the lever so that the other end is driven to drive the yarn guide to move. In order to make the yarn guide adapt to the length requirements of different winding bobbins, the length of the lever force arm is changed by means of an adjustable fulcrum to change the stroke of the driven end of the lever. Specifically, the slider is used as the fixed end and the movable end, and the fixed end is hinged with the lever; the slideway is made on the lever for the movement of the fulcrum and the sliding end; the fulcrum is composed of a slider and a bracket, and the slider is connected to the lever. Once the fulcrum is determined, the sliding The block is stationary relative to the slideway, while the lever can swing relative to the slideway through the sliding movement of the slideway and the connecting block, and the length of the bracket can be adjusted according to the process requirements. Put the lever combination on the slideway, drive the fixed end, and make the lever swing relative to the slideway, and the swinging motion of the lever will drive the movable end to slide so as to realize the motion requirement of the yarn guide.

A lever device with an adjustable arm of the present invention is mainly composed of a slide bar, a slideway, a lever and an adjustable fulcrum bracket. The slide bar and the slideway are connected through a connecting rod to form a fixed frame. One end of the lever is hinged to the active slider. The sliding block and the sliding rod are slidably connected, and there is a sliding groove in the middle of the lever. The fulcrum slider slidingly matched with the sliding groove is hinged on one end of the adjustable fulcrum bracket, and the other end of the adjustable fulcrum bracket is fixed on the fixed frame. The other end of the lever A passive sliding groove is provided, and the sliding column of the passive sliding block slidingly matched with the slideway is stuck in the passive sliding groove.

As a preferred technical solution:

According to the above-mentioned lever device with adjustable moment arm, the slide bar and the slideway are parallel to each other.

In the above-mentioned lever device with adjustable moment arm, the sliding connection between the active slider and the sliding rod means that the active slider is provided with a sliding groove, and the sliding rod is placed in the sliding groove. The slide bar is placed in the chute of the active slider. The active slider slides in translation along the slide bar, and the end of the drive lever fixed to the active slider moves in translation along the slide bar. The sliding form is a single-degree-of-freedom sliding fit, and the moving direction of the slider is vertical to the inside or outside of the picture.

As mentioned above, a lever device with an adjustable arm, the passive slider is composed of a sliding column and a slider that are integrated, the slider is provided with a chute, and the chute is placed in the chute of the passive slider . The single-degree-of-freedom sliding movement of the active slider along the slider drives the fixed end of the drive lever to translate along the slider. Under the action of the adjustable fulcrum, the lever drives the latter along the slideway through sliding cooperation with the passive slider. For translational movement. Slider movement direction vertical picture inward or outward.

In the aforementioned lever device with an adjustable arm, the hinge means that the fulcrum slider has no linear displacement but only angular displacement relative to the adjustable fulcrum bracket, that is, the fulcrum slider only rotates but does not move relative to the adjustable fulcrum bracket. panning.

In the aforementioned lever device with adjustable moment arm, the passive sliding groove and the sliding groove refer to a structure on the lever for the slider and the lever to slide relative to each other. At the same time, it also refers to the slider structure that facilitates relative sliding on the slideway on the active slider and the passive slider.

A lever device with adjustable force arm of the present invention is an innovative transition mechanism, which can combine the groove drum and the yarn guide and length fixing device into one in the yarn guide power transmission device of the textile winding machine, changing the lever mechanism The fulcrum changes the length of the force arm to change the yarn guide stroke, and can replace the sheave with a more economical cam to save costs. When the cam is put into textile use, it is enough to analyze the winding motion law of the cam, and the work with the sheave The principle is the same, and the stroke is also controlled by the contour line. In addition, because the lever mechanism is simple in structure, easy to manufacture, saves materials, and has a wide range of space, the device can work in almost any place and is widely used.

Beneficial effect

Compared with the prior art, the present invention has the following advantages and positive effects:

(1) The movement of the yarn guide is changed through the lever movement, which is efficient and stable;

(2) The force arm is adjustable, so the yarn guide stroke can be adjusted, which can meet the working requirements of different winding lengths;

(3) Simple structure, saving space and materials;

(4) Simple operation, excellent repeatability and reproducibility.

Description of drawings

Fig. 1 is a schematic diagram of a lever device with an adjustable arm of the present invention

Fig. 2 is a left view of the device of the present invention

Figure 3 is a schematic cross-sectional view of the active slider, slider and lever

Figure 4 is a schematic cross-sectional view of the passive slider, slideway and lever

1 is the active slider 2 is the bracket 3 is the lever 4 is the passive slider 5 is the slideway

6 is the fulcrum slider 7 is the slider

Detailed ways

The present invention will be further described below in combination with specific embodiments. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

A lever device with an adjustable arm of the present invention, said lever device with an adjustable arm is mainly composed of a slide bar (7), a slideway (5), a lever (3) and an adjustable fulcrum bracket (2) , the sliding rod (7) and the slideway (5) are connected by connecting rods to form a fixed frame, one end of the lever (3) is hinged to the active slider (1), the active slider (1) is slidingly connected to the sliding rod (7), and the lever ( 3) There is a sliding groove in the middle section, and the fulcrum slider (6) slidingly matched with the sliding groove is hinged on one end of the adjustable fulcrum bracket (2), and the other end of the adjustable fulcrum bracket (2) is fixed on the fixed frame, and the lever ( The other end of 3) has a passive sliding groove, and the sliding column of the passive slider (4) slidingly matched with the slideway (5) is stuck in the passive sliding groove, as shown in Fig. 1 and Fig. 2 .

The slide bar (7) and the slideway (5) are parallel to each other.

The sliding connection between the active slider (1) and the slider (7) means that the active slider (1) has a chute, and the slider (7) is placed in the chute of the slider (1). The active slider (1) translates and slides along the slide bar (7), and the end of the drive lever (3) fixed to the active slider (1) translates along the slide bar (7). The sliding form is a single-degree-of-freedom sliding fit. The structural section is shown in Figure 3, and the moving direction of the slider is vertical to the inside or outside of the picture.

The passive slider (4) is composed of a sliding post and a sliding block which are integrated, the slider has a chute, and the slideway (5) is placed in the chute of the passive slider (4). The single-degree-of-freedom sliding movement of the active slider along the slider drives the fixed end of the drive lever to translate along the slider. Under the action of the adjustable fulcrum, the lever drives the latter along the slideway through sliding cooperation with the passive slider. For translational movement. The structural cross-section is shown in Figure 4, and the moving direction of the slider is vertical to the inside or outside of the picture.

The hinge means that the fulcrum slider (6) has no linear displacement but only angular displacement relative to the adjustable fulcrum bracket (2), that is, the fulcrum slider (6) only rotates but does not translate relative to the adjustable fulcrum bracket (2).

Claims (5)

1. leverage that the arm of force is adjustable, it is characterized in that: the leverage that the described arm of force is adjustable is mainly by slide bar (7), slideway (5), lever (3) and adjustable fulcrum support (2) consist of, slide bar (7) and slideway (5) connect to form fixed frame by pipe link, the lever hinged active sliding block of (3) one ends (1), active sliding block (1) is slidingly connected with slide bar (7), lever (3) stage casing has sliding tray, be articulated in an end of adjustable fulcrum support (2) with the fulcrum slide block (6) of sliding tray bearing fit, the other end of adjustable fulcrum support (2) is fixed on the fixed frame, the other end of lever (3) has passive sliding tray, is stuck in the passive sliding tray with the traveller by movable slider (4) of slideway (5) bearing fit.

2. the adjustable leverage of a kind of arm of force according to claim 1 is characterized in that, described slide bar (7) and slideway (5) are parallel to each other.

3. the adjustable leverage of a kind of arm of force according to claim 1 is characterized in that, described active sliding block (1) is slidingly connected with slide bar (7) and refers to that active sliding block (1) has chute, and slide bar (7) places the chute of slide block (1).

4. the adjustable leverage of a kind of arm of force according to claim 1 is characterized in that, describedly is comprised of shape all-in-one-piece traveller and slide block by movable slider (4), has chute on the slide block, and slideway (5) places by the chute of movable slider (4).

5. the adjustable leverage of a kind of arm of force according to claim 1, it is characterized in that, the described hinged fulcrum slide block (6) that refers to does not have displacement of the lines with respect to adjustable fulcrum support (2) and only has angular transposition, and namely fulcrum slide block (6) only has to rotate with respect to adjustable fulcrum support (2) does not have translation.

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