Automatic chain tensioning device

Abstract

The present invention discloses an automatic chain tensioning device, comprising a chain arranged on a cigarette making machine and a sprocket for driving the chain to operate, a swinging member for tightening the chain arranged on the cigarette making machine, and a tensioning device arranged on the cigarette making machine for controlling the rotation of the swinging member, the tensioning device comprising a servo motor and a reducer arranged on the servo motor, the output end of the reducer is connected to a bridge gear and the bridge gear is meshed with a circular arc gear, the circular arc gear is connected to the swinging member, and the tensioning device is connected to a control panel. The beneficial effect of the present invention is that an induction switch is arranged on the chain, and when the chain is not in a tensioned state, the induction switch transmits information to the control panel, and the tensioning device is controlled by the control panel to drive the swinging member to tighten the chain, thereby realizing an automatic tensioning effect.

Description

Technical Field

[0001] The invention relates to the field of cigarette making machines, and in particular to an automatic chain tensioning device. Background Art

[0002] The cigarette making machine is a machine that rolls tobacco into cigarettes with cigarette paper. It is the main cigarette making machine. The cigarette making machine mainly includes four main parts: supplying tobacco, forming, cutting and weight control, as well as auxiliary parts such as printing and dust removal.

[0003] The printing part of the cigarette making machine is mainly used to print trademarks on cigarette paper for identification. During the production process, the cigarette paper must be kept in a tensioned state so that the printing position of the trademark on each cigarette can be consistent. If the cigarette paper is not in a tensioned state, the printing position of the trademark on each cigarette will be inconsistent, and there will be a phenomenon of uneven height. Since the existing cigarette paper will become loose during printing, it is not convenient to stretch and tension it, which leads to the problem of inconsistent printing position. Summary of the invention

[0004] The purpose of the present invention is to provide an automatic chain tensioning device to solve the above-mentioned problems in view of the above-mentioned deficiencies and defects of the prior art.

[0005] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0006] A chain automatic tensioning device comprises a chain arranged on a cigarette making machine and a sprocket for driving the chain to operate, characterized in that a swinging member for tightening the chain is arranged on the cigarette making machine, and also comprises a tensioning device arranged on the cigarette making machine for controlling the rotation of the swinging member, the tensioning device comprises a servo motor and a reducer arranged on the servo motor, the output end of the reducer is connected to a bridge gear and the bridge gear is meshed with a circular arc gear, the circular arc gear is connected to the swinging member, and the tensioning device is connected to a control panel.

[0007] In a preferred embodiment of the present invention, the cigarette making machine is further provided with a non-return gear meshing with the circular arc gear, and the non-return gear is fixed to the bottom plate via a connecting rod.

[0008] In a preferred embodiment of the present invention, an induction switch is provided on the chain, and the induction switch is connected to the control panel.

[0009] In a preferred embodiment of the present invention, the swing member is a swing arm.

[0010] Due to the adoption of the above technical solution, the beneficial effect of the present invention is that an induction switch is arranged on the chain. When the chain is not in a tensioned state, the induction switch transmits information to the control panel, and the tensioning device is controlled by the control panel to drive the swinging member to tighten the chain, thereby realizing automatic tensioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of an automatic chain tensioning device of the present invention.

[0013] Figure 2 It is a schematic diagram of a tensioning device of an automatic chain tensioning device of the present invention. DETAILED DESCRIPTION

[0014] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below.

[0015] See also Figure 1 to Figure 2 The automatic chain tensioning device shown in the figure comprises a chain 101 arranged on a cigarette making machine 100 and a sprocket 102 driving the chain 101 to operate. The cigarette making machine 100 is provided with a swinging member 200 for tightening the chain 101. The swinging member 200 is preferably a swing arm. The swing arm 200 in this embodiment is located at one side of the chain 101 and is in contact with the sprocket 102.

[0016] The cigarette making machine 100 also includes a tensioning device 300 for controlling the rotation of the swinging member 200. The tensioning device 300 includes a servo motor 310 and a reducer 320 disposed on the servo motor 310. The output end 321 of the reducer 320 is connected to a bridge gear 330, and the bridge gear 330 is meshed with an arc gear 340. The arc gear 340 is connected to the swinging member 200. The tensioning device 300 is connected to a control panel (not shown in the figure). When the chain 101 is not in a tensioned state, the reducer 320 is driven by the servo motor 310, and the output end 321 of the reducer 320 drives the bridge gear 330 to rotate and then drives the arc gear 340. The arc gear 340 drives the swinging member 200 to rotate. The swinging member 200 swings to tighten the sprocket 102 toward the chain 101, thereby achieving an automatic tensioning effect.

[0017] The cigarette making machine 100 is also provided with a non-return gear 400 meshing with the circular arc gear 340, and the non-return gear 400 is fixed to the bottom plate 420 via a connecting rod 410. The bottom plate 420 in this embodiment is connected to a bracket 440 via a connecting block 430, and the bracket 440 has a bridge gear 330. The non-return gear 400 is used to limit the circular arc gear 340 from rotating in the reverse direction.

[0018] The chain 101 is provided with a sensor switch 500, which is connected to the control panel. When the chain 101 is not in a tensioned state, the sensor switch 500 can sense it, and the sensor switch 500 transmits information to the control panel to control the tensioning device 300 to drive the swing member 200 to tighten the chain 101, thereby achieving automatic tensioning.

[0019] When the present invention is in use, when the chain 101 is not in a tensioned state, it can be sensed by the induction switch 500, and the induction switch 500 transmits information to the control panel to control the servo motor 310 of the tensioning device 300 to drive the reducer 320, and the output end 321 of the reducer 320 drives the bridge gear 330 to rotate and then drives the arc gear 340, and the arc gear 340 drives the swinging member 200 to rotate, and the swinging member 200 swings to tighten the sprocket 102 toward the chain 101, thereby realizing automatic tensioning.

[0020] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic chain tensioning device, comprising a chain arranged on a cigarette making machine and a sprocket for driving the chain, characterized in that: The cigarette making machine is provided with a swinging member for tightening the chain, and also includes a tensioning device provided on the cigarette making machine for controlling the rotation of the swinging member, the tensioning device includes a servo motor and a reducer provided on the servo motor, the output end of the reducer is connected to a bridge gear and the bridge gear is meshed with a circular arc gear, the circular arc gear is connected to the swinging member, and the tensioning device is connected to a control panel; The cigarette making machine is also provided with a non-return gear meshing with the circular arc gear, the non-return gear is fixed to the bottom plate through a connecting rod, and the non-return gear is used to limit the reverse rotation of the circular arc gear; The chain is provided with an induction switch, and the induction switch is connected to the control panel; When the chain is not in a tensioned state, it can be sensed by the induction switch, and the induction switch transmits information to the control panel to control the servo motor of the tensioning device to drive the reducer. The output end of the reducer drives the bridge gear to rotate and then drives the circular arc gear. The circular arc gear drives the swinging part to rotate. The swinging part swings to tighten the sprocket toward the chain, thereby realizing automatic tensioning.

2. An automatic chain tensioning device according to claim 1, characterized in that: The swinging member is a swing arm.

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