CN204284333U - A kind of machinery belt transmission automatic takeup - Google Patents

Abstract

The utility model discloses a kind of machinery belt transmission automatic takeup, comprise driving shaft, driven shaft, frame I, frame II, also comprise elastic element, described frame I is flexibly connected with frame II, described driven shaft is connected with frame II by linkage mechanism, described elastic element is fixedly connected with frame I, and driving shaft is rotatably connected with elastic element.When the load of driven shaft is excessive; make frame II and frame I can not relative movement time or mobile range when not reaching predetermined stroke; now be connected the effect that elastic element just serves adjustment two wheelbase with driving shaft; the belt of two between centers is got loose; driving shaft is in idling conditions, effectively protects power source and whole mechanism.

Description

A mechanical belt drive automatic tensioning device

technical field

The utility model relates to a power transmission mechanism, in particular to a device applied to belt transmission.

Background technique

The traditional belt drive includes a driving shaft and a driven shaft, and the power is transmitted from the driving shaft to the driven shaft through the belt, and then output through the driven shaft. In order to make the power transmission smoothly, the belt between the two shafts is generally in a tight state, and for the stability of the power transmission process, the distance between the two shafts is fixed. The relatively fixed two shafts not only bring troubles to the belt installation, but also when the load at the output end is too heavy, the reaction force may cause the motor to burn out. Especially for some closed installation mechanisms, the difficulty and cost of maintenance will be very high.

Utility model content

The technical problem to be solved by the utility model is to provide a belt transmission device capable of automatically releasing pressure.

The solution of the utility model to solve the technical problem is: a mechanical belt drive automatic tensioning device, including a driving shaft, a driven shaft, a frame I, a frame II, and an elastic element, the frame I and the machine The frame II is movably connected, the driven shaft is connected with the frame II through a linkage mechanism, the elastic element is fixedly connected with the frame I, and the driving shaft is rotatably connected with the elastic element.

As a further improvement of the above technical solution, it also includes a belt, a driving wheel, a driven wheel, and a sliding mechanism, the driving wheel is fixedly connected to the driving shaft, the driven wheel is fixedly connected to the driven shaft, the belt is connected to the driving wheel, the driven The moving wheel is connected; the frame II is connected with the frame I through a sliding mechanism, so that the frame II can move left and right relative to the frame I.

As a further improvement of the above technical solution, the elastic element is a coil spring.

As a further improvement of the above technical solution, it also includes a shaft frame, the drive shaft is connected to the shaft frame in rotation, and there are multiple coil springs, one end of all the coil springs is fixedly connected to the frame 1, and the other end is fixed to the shaft frame connect.

The beneficial effects of the utility model are: under normal operation, the driving shaft drives the driven shaft and then drives the frame II to move relative to the frame I. During the movement, the wheelbase of the two shafts remains unchanged, but When the load on the driven shaft is too large, so that the frame II and the frame I cannot move relative to each other or the movement range cannot reach the specified stroke, the elastic element connected to the driving shaft at this time will play a role in adjusting the two wheelbases, so that The belt between the two shafts is loose, and the driving shaft is in an idling state, which effectively protects the power source and the whole mechanism.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present invention more clearly, the following will briefly describe the accompanying drawings that are used in the description of the embodiments. Apparently, the drawings described are only some embodiments of the utility model, not all embodiments, and those skilled in the art can also obtain other designs and drawings according to these drawings without creative work.

Fig. 1 is a structural representation of the utility model.

Detailed ways

The idea, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and accompanying drawings, so as to fully understand the purpose, characteristics and effects of the present utility model. Apparently, the described embodiments are only some of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without paying creative efforts, All belong to the protection scope of the utility model. In addition, all the connection/connection relationships mentioned in this article do not refer to the direct connection of components, but mean that a better connection structure can be formed by adding or reducing connection accessories according to specific implementation conditions. The various technical features in the invention can be combined interactively on the premise of not conflicting with each other.

With reference to Fig. 1, a kind of mechanical belt transmission automatic tensioning device comprises driving shaft 1, driven shaft 2, frame I41, frame II42, also includes belt 3, driving wheel 11, driven wheel 21, sliding mechanism, elastic element 5. The driving wheel 11 is fixedly connected to the driving shaft 1, the driven wheel 21 is fixedly connected to the driven shaft 2, the belt 3 is connected to the driving wheel 11 and the driven wheel 21; the frame II42 is connected to the Frame I41 is connected so that frame II42 can move left and right relative to frame I41; 5 is fixedly connected with the frame I41, and the drive shaft 1 is rotatably connected with the elastic element 5.

When working, the power source transmits the power to the driving shaft, the driving shaft rotates by driving the driving wheel, and then the driving wheel drives the driven wheel to rotate under the action of the belt, and then the driven wheel drives the driven shaft to rotate, and finally the driven shaft passes through the connecting wheel. The rod structure (not shown in the figure) drives the frame II to slide relative to the frame I; when the load of the frame II is too large, the driven shaft is difficult to rotate, and the reaction force is transmitted to the driving shaft at this time, and since the driving shaft is elastically The element is connected with the frame I, and the reaction force of this part can be absorbed by the elastic element, and the elastic element is deformed. At this time, the distance between the two shafts has changed, and then the originally tight belt becomes loose, and the active The wheel is separated from the driven wheel, and the driving wheel is idling, which prevents the reaction force from being transmitted back to the power source and damages the equipment. And as the belt is used for a long time, the belt will become loose. At this time, the automatic adjustment function of the elastic element is used to adjust the distance between the two shafts, so that the belt is tightened again; the actual service life of the overall mechanism is extended.

Further as a preferred embodiment, the elastic element 5 is a coil spring.

Further as a preferred embodiment, it also includes a shaft frame, the drive shaft 1 is rotatably connected to the shaft frame, and there are multiple coil springs, one end of all the coil springs is fixedly connected to the frame I41 and the other end is fixed to the shaft frame connect.

The preferred embodiments of the present utility model have been specifically described above, but the present invention is not limited to the described embodiments, and those skilled in the art can also make various equivalent modifications or modifications without violating the spirit of the present utility model. Replacement, these equivalent modifications or replacements are all included within the scope defined by the claims of the present application.

Claims (4)

1. a machinery belt transmission automatic takeup, comprise driving shaft (1), driven shaft (2), frame I(41), frame II(42), it is characterized in that: also comprise elastic element (5), described frame I(41) with frame II(42) be flexibly connected, described driven shaft (2) is by linkage mechanism and frame II(42) be connected, described elastic element (5) and frame I(41) be fixedly connected with, driving shaft (1) is rotatably connected with elastic element (5).

2. a kind of machinery belt transmission automatic takeup according to claim 1, it is characterized in that: also comprise belt (3), driving wheel (11), follower (21), slide mechanism, described driving wheel (11) is fixedly connected with driving shaft (1), described follower (21) is fixedly connected with driven shaft (2), and described belt (3) is connected with driving wheel (11), follower (21); Described frame II(42) by slide mechanism and frame I(41) be connected, make frame II(42) energy frame I(41 relatively) move left and right.

3. a kind of machinery belt transmission automatic takeup according to claim 2, is characterized in that: described elastic element (5) is helical spring.

4. a kind of machinery belt transmission automatic takeup according to claim 3, it is characterized in that: also comprise pedestal, described driving shaft (1) is rotatably connected with pedestal, described helical spring has many, described all helical spring one end and frame I(41) be fixedly connected with other one end and be fixedly connected with pedestal.