CN220484487U - Overload detection mechanism for conveyor - Google Patents

Abstract

The utility model discloses a conveyor overload detection mechanism which comprises a push rod, wherein a threaded part is arranged on the push rod, a push plate is connected to the threaded part in a threaded way, a bimetallic strip is arranged below the push rod, the bimetallic strip corresponds to the push plate and is not contacted with the push plate, a heating element is arranged outside the bimetallic strip, one end of the push rod is provided with a contact, the conveyor overload detection mechanism further comprises a mounting frame, one side of the front surface of the mounting frame is provided with a support, a guide rod is fixed at a position corresponding to the push rod on one side of the support, which is close to the push rod, the guide rod is inserted into the push rod, a fixing plate is fixed on one side, far away from the guide rod, of the front surface of the mounting frame, and a spring is sleeved on the circumference of one side, close to the fixing plate, of the push rod. In the utility model, the push plate can be connected with the threaded part through the threads, so that the position of the push plate on the push rod can be adjusted, and the situation that the push plate is difficult to push after the expansion effect of the bimetallic strip is deteriorated under long-term use is avoided.

Description

Overload detection mechanism for conveyor

Technical Field

The utility model relates to the technical field of overload detection, in particular to an overload detection mechanism of a conveyor.

Background

In the case of vertical conveyors, the power is typically a motor, and in order to avoid overload of the conveyor, the thermal relay is stopped when the lift motor is operated in overload, thereby effectively protecting the motor.

However, the thermal relay in the prior art generally adopts a link mechanism, the service life of the link mechanism is low, once the link mechanism is damaged, the link mechanism is difficult to work, and the bimetallic strip of the thermal relay is tired in metal after long-term use, so that the working capacity of the thermal relay is reduced, and the operation is difficult to be carried out.

Disclosure of Invention

The utility model aims to provide an overload detection mechanism for a conveyor, which solves the problems that in the prior art, the service life of a connecting rod mechanism is low, once the connecting rod mechanism is damaged, the connecting rod mechanism is difficult to work, and the bimetallic strip of a thermal relay is tired due to metal after long-term use, so that the working capacity of the connecting rod mechanism is reduced, and the operation is difficult to carry out.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a conveyer overload detection mechanism, includes the push rod, be equipped with screw thread portion on the push rod, threaded connection has the push pedal on the screw thread portion, the below of push rod is equipped with the bimetallic strip, bimetallic strip corresponds and does not contact with the push pedal, the bimetallic strip outside is equipped with heating element, the one end of push rod is equipped with the contact.

Preferably, the device further comprises a mounting frame, wherein a support is mounted on one side of the front surface of the mounting frame, a guide rod is fixed at a position, corresponding to the push rod, of one side, close to the push rod, of the support, and the guide rod is inserted into the push rod.

Preferably, one side of the front surface of the mounting frame far away from the guide rod is fixed with a fixing plate, a spring is sleeved on the circumference of one side of the push rod close to the fixing plate, one end of the spring far away from the fixing plate is fixed with a spring seat, and the inner wall of the spring seat is fixedly connected on the push rod.

Preferably, the lower end of the bimetallic strip is fixed on the bracket.

Preferably, a limiting plate is arranged at one end of the push rod, which is close to the guide rod.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model has no connecting rod structure and longer service life.

2. In the utility model, the push plate can be connected with the threaded part through the threads, so that the position of the push plate on the push rod can be adjusted, and the situation that the push plate is difficult to push due to metal fatigue of the bimetallic strip when the push plate is used for a long time is avoided.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, serve to explain the utility model. In the drawings:

FIG. 1 is a schematic diagram of the structure of the present utility model;

fig. 2 is a schematic structural view of the thermal relay of the present utility model.

In the figure: 100. a lifting power motor; 200. a thermal relay; 300. a control circuit; 1. a mounting frame; 2. a bracket; 3. bimetallic strips; 4. a push plate; 5. a push rod; 51. a threaded portion; 6. a spring; 61. a spring seat; 7. a fixing plate; 8. a limiting plate; 9. a guide rod; 10. and a contact.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 2, in the embodiment of the utility model, a conveyor overload detection mechanism includes a push rod 5, a threaded portion 51 is provided on the push rod 5, a push plate 4 is screwed on the threaded portion 51, a bimetal 3 is provided below the push rod 5, the lower end of the bimetal 3 is fixed on a support 2, the bimetal 3 corresponds to the push plate 4 and is not in contact with the push plate 4, a heating element is provided outside the bimetal 3, a contact 10 is provided at one end of the push rod 5, when the current passing through a lifting power motor 100 is too large, the temperature of the heating element rises, and due to the different thermal expansion coefficients of the bimetal 3, the metal sheet at the left side of the bimetal is bent leftwards, which can push the push plate 4 leftwards, so that the push plate 4 can push the push rod 5 leftwards, and then the push rod 5 can be separated from the contact 10, so as to realize the outage of a control circuit 300;

as shown in fig. 2, the device further comprises a mounting frame 1, wherein one side of the front surface of the mounting frame 1 is provided with a bracket 2, a guide rod 9 is fixed at a position corresponding to the push rod 5 on one side of the bracket 2 close to the push rod 5, the guide rod 9 is inserted into the push rod 5, and the guide rod 9 can provide a guide force for the push rod 5 so as to enable the push rod 5 to move left and right stably;

with continued reference to fig. 2, in order to enable the push rod 5 to be in contact with the contact 10 again after the temperature of the bimetal 3 is cooled, the control circuit 300 is electrified, a fixed plate 7 is fixed on one side of the front surface of the mounting frame 1, which is far away from the guide rod 9, a spring 6 is sleeved on the circumference of one side of the push rod 5, which is close to the fixed plate 7, a spring seat 61 is fixed on one end of the spring 6, which is far away from the fixed plate 7, and the inner wall of the spring seat 61 is fixedly connected on the push rod 5, in the above structure, when the push rod 5 moves leftwards, the spring 6 is stretched, when the push rod 4 loses thrust after the bimetal 3 is cooled, the spring 6 is reset, the push rod 5 can be pulled, and the push rod 5 is closed on the contact 10 again.

Here, since the push plate 4 can be connected with the screw portion 51 through the screw, the push plate 4 can be adjusted on the push rod 5, avoiding the situation that the push plate 4 is difficult to push after the expansion effect of the bimetal sheet is deteriorated under long-term use, and the limit plate 8 is installed at one end of the push rod 5 close to the guide rod 9, so that the push plate 4 is prevented from being separated from the push rod 5.

The working principle and the using flow of the utility model are as follows: when the device is used, when the current passing through the lifting power motor 100 is overlarge, the temperature of the heating element is increased, and due to the difference of the thermal expansion coefficients of the bimetallic strip 3, the metal strip on the left side of the bimetallic strip bends leftwards, so that the push plate 4 can push the push rod 5 leftwards, the push rod 5 can move leftwards, the spring 6 is stretched, and the push rod 5 can be disconnected from the contact 10, so that the power failure of the control circuit 300 is realized;

when the pushing plate 4 loses pushing force after the bimetallic strip 3 is cooled, the spring 6 is reset, and the push rod 5 can be pulled rightwards, so that the push rod 5 is closed on the contact 10 again;

here, since the push plate 4 can be connected to the screw portion 51 by screw, the push plate 4 can be adjusted on the push rod 5, and the situation that the push plate 4 is difficult to push after the expansion effect of the bimetal becomes poor in long-term use is avoided.

Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and the present utility model is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present utility model has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (5)

1. The utility model provides a conveyer overload detection mechanism which characterized in that: including push rod (5), be equipped with screw thread portion (51) on push rod (5), threaded connection has push pedal (4) on screw thread portion (51), the below of push rod (5) is equipped with bimetallic strip (3), bimetallic strip (3) correspond and contactless with push pedal (4), bimetallic strip (3) outside is equipped with heating element, the one end of push rod (5) is equipped with contact (10).

2. A conveyor overload detection mechanism as claimed in claim 1 wherein: still include mounting bracket (1), support (2) are installed to mounting bracket (1) front surface one side, one side that support (2) are close to push rod (5) is fixed with guide bar (9) with the position that push rod (5) corresponds, inside that guide bar (9) inserted push rod (5).

3. A conveyor overload detection mechanism as claimed in claim 2 wherein: one side that guide bar (9) was kept away from to the front surface of mounting bracket (1) is fixed with fixed plate (7), the cover is equipped with spring (6) on the circumference of one side that push rod (5) are close to fixed plate (7), one end that fixed plate (7) was kept away from to spring (6) is fixed with spring holder (61), and the inner wall rigid coupling of spring holder (61) is on push rod (5).

4. A conveyor overload detection mechanism as claimed in claim 2 wherein: the lower end of the bimetallic strip (3) is fixed on the bracket (2).

5. A conveyor overload detection mechanism as claimed in claim 2 wherein: and a limiting plate (8) is arranged at one end of the push rod (5) close to the guide rod (9).