Novel tensioning mechanism

Abstract

A novel tensioning mechanism comprises a machine body shell, and a center wheel is rotationally arranged on the machine body shell. Crank arms are hinged to the two sides of the machine body shell respectively, and wing wheels are rotationally arranged on the two crank arms respectively; the two ends of the crank arm are provided with jacking mechanisms, one end of each jacking mechanism is arranged on the whole machine shell where the tensioning mechanism belongs, and the other end of each jacking mechanism is attached to the tail end of the crank arm. The tensioning mechanism is simple in structure and good in using effect, solves the problems that in the prior art, a chain and a tensioning wheel of a tensioning mechanism are not tightly attached, the contact distance is too short, and local stress of the chain is not uniform through the simple structure, achieves two-way uniform tensioning of the chain, enables the chain or a belt to be tightly attached to the tensioning wheel, and improves the tensioning efficiency. The service life is prolonged; and the use safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of general machinery, in particular to a novel tensioning mechanism. Background Art

[0002] Tensioning mechanisms are commonly used in various types of chain or belt power transmission equipment. The purpose of its implementation is to ensure stable transmission through tensioning, and also to make the belt or chain equipment fit the transmission wheel so that the chain is stable. However, the current tensioning mechanism is generally simple in setting, and all of them use a simple single wheel structure to open or tighten the chain. The disadvantage is that the adjustable chain length is limited, and the tensioning mechanism or tensioning wheel is more in point contact with the belt or chain, resulting in uneven overall transmission force of the chain, loose engagement between the chain and the gear, etc., resulting in a short service life of the chain, disengagement, and safety hazards. Utility Model Content

[0003] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a new tensioning mechanism with a simple structure, which can adjust the chain length to be longer, especially can achieve bidirectional uniform tensioning of the chain, and make the chain or belt fit more closely with the tensioning wheel, and has a longer service life and is safer.

[0004] The device comprises a body shell, which is the assembly base of the device, and a central wheel is rotatably arranged on the body shell;

[0005] The two sides of the machine body shell are respectively hinged with crank arms, and the two crank arms are respectively rotatably provided with wing wheels;

[0006] Both ends of the crank arm are provided with a pressing mechanism, one end of the pressing mechanism is arranged on the whole machine housing to which the tensioning mechanism belongs, and the other end is arranged in close contact with the rear end of the crank arm.

[0007] The effect achieved in this way is that the chain or belt passes through the upper part of the center wheel from the lower part of the wing wheel on one side and comes out from the lower part of the wing wheel on the other side. The position of the tail end of the crank arm can be adjusted by adjusting the angle of the top-pressing mechanism, so that the wing wheel partially presses down the chain or belt, thereby increasing the length of the chain or belt fitting the center wheel, and tensioning both sides synchronously to avoid affecting the transmission force effect.

[0008] The beneficial effects of the utility model are as follows: the utility model has a simple structure and good use effect. Through the simple structure, the problems of the loose fit between the tensioning mechanism chain and the tensioning wheel, the short contact distance, and the uneven local force on the chain in the prior art are solved, and the bidirectional uniform tensioning of the chain is achieved, and the chain or belt is made to fit more closely with the tensioning wheel, thereby improving the service life and safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1It is a structural schematic diagram of a novel tensioning mechanism described in the utility model;

[0010] Figure 2 yes Figure 1 A cross-sectional view of

[0011] Reference numerals:

[0012] 1-Pressing mechanism 11-Telescopic connecting rod 12-Top plate 2-Crank arm 21-Pressing block 3-Wing wheel 4-Base plate 5-Center wheel

[0013] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0014] Reference Figure 1 , Figure 2 The novel tensioning mechanism described in the utility model comprises a machine body shell, which is the assembly basis of the device, and a center wheel 5 is arranged on the machine body shell;

[0015] The two sides of the body shell are respectively hinged with crank arms 2, and the two crank arms 2 are respectively rotatably provided with wing wheels 3;

[0016] The two ends of the crank arm 2 are provided with a pressing mechanism 1, and the pressing mechanism 1 is arranged on the whole machine housing to which the tensioning mechanism belongs.

[0017] The effect achieved in this way is that the chain or belt passes through the upper part of the center wheel 5 from the lower part of the wing wheel 3 on one side, and passes out from the lower part of the wing wheel 3 on the other side. The position of the tail end of the crank arm 2 can be adjusted by adjusting the angle of the top-pressing mechanism 1, so that the wing wheel 3 partially presses down the chain or belt, thereby increasing the length of the chain or belt fitting the center wheel, and tensioning both sides synchronously to avoid affecting the transmission force effect.

[0018] Furthermore, the housing is in an integrated form, including two spaced-apart base plates 4, and a top plate 12 is integrally connected to the top of the base plates 4;

[0019] The central wheel 5 is rotatably disposed between the two base plates 4 .

[0020] Preferably, the substrate 4 is a triangular plate with smooth edges and corners.

[0021] Preferably, the top of the top plate 12 is also integrally provided with an assembly ear plate, that is, the device is fixed as a whole to the whole machine housing to which the tensioning mechanism belongs through the assembly ear plate.

[0022] Furthermore, the center wheel 5 and the wing wheel 3 are one of gears, gear sets or rollers.

[0023] Furthermore, the crank arm 2 is a double-layer crank arm 2, and the impeller 3 is rotatably arranged between the double-layer crank arms 2;

[0024] A pressing block 21 is fixedly arranged on the outer side of the crank arm 2 .

[0025] Furthermore, the pressing mechanism 1 includes a telescopic connecting rod 11, one end of which is fixedly mounted on the entire machine housing to which the tensioning mechanism belongs, and the other end of which is fixedly provided with a top plate 12, and the top plate 12 is arranged to fit the pressing block 21 of the crank arm 2 housing.

[0026] Preferably, the telescopic connecting rod 11 comprises an adjusting sleeve and two screws with opposite threads, the two screws are threaded into the adjusting sleeve, and the two screws are moved in opposite directions by rotating the adjusting sleeve.

[0027] Preferably, the device is centrally arranged at the center of the chain or belt transmission mechanism, that is, the center of the chain or belt on one side. The effect achieved by this is that the chain or belt part can be tensioned in both directions by synchronously adjusting the pressing mechanism 1, thereby achieving bidirectional uniform tensioning of the chain and making the chain or belt fit more closely with the tensioning wheel.

[0028] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A novel tensioning mechanism, comprising a housing, on which a central wheel is rotatably arranged, characterized in that: The two sides of the machine body shell are respectively hinged with crank arms, and the two crank arms are respectively rotatably provided with wing wheels; Both ends of the crank arm are provided with a pressing mechanism, one end of the pressing mechanism is arranged on the whole machine housing to which the tensioning mechanism belongs, and the other end is arranged in close contact with the rear end of the crank arm.

2. A novel tensioning mechanism according to claim 1, characterized in that: The housing is in an integrated form, comprising two spaced-apart base plates, with a top plate integrally connected to the top of the base plates; The central wheel is rotatably arranged between the two base plates; The central wheel and the wing wheel are one of gears, gear sets or rollers; The crank arm is a double-layer crank arm, and the impeller is rotatably arranged between the double-layer crank arms; A pressure block is fixedly arranged on the outer side of the crank arm; The pressing mechanism comprises a telescopic connecting rod, one end of which is fixedly mounted on the whole machine housing to which the tensioning mechanism belongs, and the other end of which is fixedly provided with a top plate, and the top plate is arranged to fit the pressing block of the crank arm housing.

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