CN202251765U

CN202251765U - Belt-drive tension device

Info

Publication number: CN202251765U
Application number: CN2011204146288U
Authority: CN
Inventors: 李南; 刘金庭; 高岚; 杜磊; 袁学敏
Original assignee: CINF Engineering Corp Ltd
Current assignee: Sinohit sunward technology limited liability company
Priority date: 2011-10-27
Filing date: 2011-10-27
Publication date: 2012-05-30
Anticipated expiration: 2021-10-27

Abstract

The utility model discloses a belt-drive tension device, belonging to the field of mechanical drive, and solving problems that a belt is still easy to slip or be excessively tensioned after a traditional belt tension device is tensioned, and a load of a device is excessively increased. The belt-drive tension device comprises a lug base, an air cylinder and a pair of swing stems of L-shaped structures, wherein the cylinder end of the air cylinder is hinged on the lug base, one end of each L-shaped swing stem is hinged with a mandril of a driven wheel, the other end of each L-shaped swing stem is hinged with a piston rod of the air cylinder; and a corner of each L-shaped swing stem is hinged on a swing stem fixing frame. The belt-drive tension device has a simple structure; a tension force is adjustable along with the extension and lengthening of the belt by regulating a pressure of the air cylinder; in addition, the constant of the tension force of the belt in a working state is met, the running precision of the belt-drive tension device is ensured, the service life of the belt-drive tension device is prolonged, and the operation efficiency is also improved.

Description

Belt drive tensioner

Technical field

The utility model relates to mechanical transmission fields, is specially a kind of bel-drivenn pneumatic tensioning device that is used for, and is particularly useful for starting frequent and transmission accuracy is demanding is with reversible transmission tensioning synchronously.

Background technique

The band transmission that relies on friction and work is a kind of typical case and widely used mechanical drive mode; Non-slip for realizing transmission; The band transmission must have certain tension force, and in band transmission synchronously, suitable tension force can also prevent that band produces slippage phenomenon on belt wheel synchronously.

In the existing belt transmission, prevent that the measure of belt slippage employing is many, method commonly used has: adopt the centre distance that moves between driving wheel or the driven wheel lengthening two-wheeled, make belt tension; Also having a kind of is that slack list one side at band is provided with Idle wheel, promote Idle wheel with belt tension after, with bolt Idle wheel is fixed.Adopt the belt of above-mentioned two kinds of method tensionings,, still can skid along with the stretching of belt is elongated.If the adjustment Idle wheel makes the belt over-tension, can influence the running accuracy and the operating life of equipment again, equipment load is excessively increased.

Summary of the invention

For belt after overcoming existing belt drive tensioner tensioning still skids or over-tension easily; The deficiency that equipment load excessively increases; The utility model aims to provide a kind of belt drive tensioner, and the rate of tension of this belt drive tensioner is adjustable and can reversely regulate, both can be according to the elongated servo-actuated tightening belt of the stretching in the belt running; Can also adjust edge slack automatically according to the traffic direction of belt, and the tension force that belt is received is constant.

To achieve these goals, the technological scheme that the utility model adopted is: said kind of belt drive tensioner, and its structural feature is to comprise:

One ear seat, it is positioned at a side of driven wheel;

One cylinder, the cylinder body end of this cylinder are hinged on the said ear seat;

Pair of L type fork, the corner of this L type fork and a fork fixing frame are hinged; One end of said L type fork and the axle of said driven wheel are hinged, and the other end of this fork and the piston rod of said cylinder are hinged.

In order to guarantee better tension effects, the angle between said L type fork two arms is preferably 75 ° ~ 89 °.

An end and a pressing plate in the said L type fork are hinged, and this pressing plate is fixedly connected with said axle, and thus, the rotating band dynamic pressure plate through L type fork makes axle move downward.

The cylinder body end of said cylinder is contained on the said ear seat through bolt and lock nut.

The corner of said L type fork is connected in the rotating shaft of said fork fixing frame.

By said structure; The utility model is used to regulate the rate of tension that is contained in belt on driving wheel and the driven wheel; It comprises the power source cylinder, and the afterbody of this cylinder adopts that bolt, lock nut are connected with the ear seat, fork fixing frame and be located at the L type fork of fork fixing frame both sides, and it is hinged that L type fork one end and cylinder piston rod pass through articulated joint; The L type fork the other end is connected to passive wheel shaft two ends; Driven wheel adopts arbor structure, through driving that pressing plate with passive wheel shaft welding produces axle to move and the tensioning driven wheel limits the fork move left and right simultaneously.The axle that is installed on the fork fixing frame drives the fork rotation through bearing.When cylinder drives forwards, the utilization lever principle, promptly L type fork can rotate around the fork fixing frame; Thereby follower is moved down; To belt tension, regulate because the pressure of cylinder can pass through pressure regulator valve, so the size of belt wheel tension force is easy to adjustment; After pressure mixed up, the tension force that cylinder provides to belt wheel was constant.Belt along with the stretching of belt is elongated, through the stroke tensioning pulley of adjustment cylinder, guarantees the tension force that belt is balanced after operation a period of time, makes the equipment proper functioning.

Compared with prior art, the beneficial effect of the utility model is: the utility model is simple in structure, through the front and back driving of cylinder piston rod and the lever principle of utilization fork, to belt tension; Through regulating the pressure of cylinder, make tension force elongated adjustable with the stretching of belt, and satisfy belt in working order in tension force constant, guaranteed the running accuracy of equipment and the working life of having improved equipment, improved production operational availability simultaneously.

Below in conjunction with accompanying drawing and embodiment the utility model is done further to set forth.

Description of drawings

Fig. 1 is a kind of embodiment's of the utility model a structure principle chart;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the B-B sectional view of Fig. 1.

In the drawings:

The 1-driving wheel; The 2-driven wheel; The 3-cylinder; 4-ear seat; The 5-bolt;

The 6-lock nut; 7-fork fixing frame; The 8-rotating shaft; 9-L type fork; The 10-pressing plate;

The 11-axle; Angle between α-9 liang of arms of L type fork.

Embodiment

A kind of belt drive tensioner; As shown in Figure 1, comprise cylinder 3, as shown in Figure 2; The afterbody of this cylinder 3 is fixedly connected with ear seat 4 through bolt 5, lock nut 6; The head of cylinder 3 is hinged through articulated joint and L type fork 9 one ends, and drives rotating shaft 8 rotations of L type fork 9 on fork fixing frame 7, and the angle between 9 liang of arms of this L type fork is 87 °.Utilization lever principle, the other end of L type fork 9 are also rotated around fork fixing frame 7, drive pressing plate 10 and rotate; As shown in Figure 3; Move down tensioning driven wheel 2 with the axle 11 of pressing plate 10 welding with the rotation of pressing plate, and the position of driving wheel 1 remains unchanged, thereby realize the purpose of tightening belt.

The content that the foregoing description is illustrated is to be understood that to these embodiments and only is used to be illustrated more clearly in the utility model; And be not used in the restriction the utility model scope; After having read the utility model, those skilled in the art all fall within the application's accompanying claims institute restricted portion to the modification of the various equivalent form of values of the utility model.

Claims

1. a belt drive tensioner is characterized in that, comprising:

One ear seat (4), it is positioned at a side of driven wheel (2);

One cylinder (3), the cylinder body end of this cylinder (3) are hinged on the said ear seat (4);

Pair of L type fork (9), the corner of this L type fork (9) and a fork fixing frame (7) are hinged; The axle (11) of one end of said L type fork (9) and said driven wheel (2) is hinged, and the piston rod of the other end of this fork (9) and said cylinder (3) is hinged.

2. belt drive tensioner according to claim 1 is characterized in that, the angle between said L type fork (9) two arms is 75 ° ~ 89 °.

3. belt drive tensioner according to claim 1 is characterized in that, an end of said L type fork (9) and a pressing plate (10) are hinged, and this pressing plate (10) is fixedly connected with said axle (11).

4. belt drive tensioner according to claim 1 is characterized in that, the cylinder body end of said cylinder (3) is contained on the said ear seat (4) through bolt (5) and lock nut (6).

5. belt drive tensioner according to claim 1 is characterized in that, the corner of said L type fork (9) through be installed on said fork fixing frame (7) on rotating shaft (8) be connected, and rotate with rotating shaft (8).