Pendulum type tensioning device

Abstract

The invention discloses a pendulum type tensioning device which comprises a tensioning base (4), the tensioning base (4) is connected with a positioning frame (5), the left end of the positioning frame (5) is hinged to the left end of a bracket (7) through a pin shaft (6), the right end of the positioning frame (5) is hinged to the right end of the bracket (7) through a rotating cam (3), and the rotating cam (3) is provided with a proximity switch (2) through a mounting frame (19) and a locking nut (20). A rotating frame (1) is connected to the bracket (7) in a hanging mode, the rotating frame (1) and the tensioning base (4) are provided with a sleeve frame (9), the bottom of the tensioning base (4) is connected with a first flat steel plate (12) through a supporting plate (11), the first flat steel plate (12) is connected with a second flat steel plate (14) and a third flat steel plate (15), it can be guaranteed that the conveying mesh belt is in a proper pre-tensioning state all the time, and the service life of the conveying mesh belt is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of belt tensioning and relates to a pendulum type tensioning device. Background Art

[0002] With the increasing emphasis on food safety and hygiene by people, the market demand for fully automatic stacked spiral quick-freezers is becoming more and more prosperous. It overcomes the problem of difficult-to-treat sanitary dead corners at places such as the brackets and guide rails of the belt of traditional supported spiral quick-freezing equipment, and has the advantages of high production efficiency, high degree of automation, smaller floor area, and good sanitary conditions. The conveyor belt used in the fully automatic stacked spiral quick-freezer is a self-stacking conveyor belt, and its basic unit is composed of two mutually mirror-image side chain plates connected by two parallel string bars. The basic units are interconnected through the slender slots on the side chain plates to form a circulating conveyor belt. Due to the slender slots, the interconnected basic units are relatively adjustable and rotatable, thus realizing the formation of a self-stacking spiral tower of the conveyor belt.

[0003] The self-stacking conveyor belt will become longer or shorter due to changes in traction force and thermal expansion and contraction. When the driving device pulls a conveyor belt up to 100 meters long at room temperature, the total length will become longer. The low temperature inside the quick-freezer will shorten the length of the conveyor belt, and the length difference can reach more than 1000 mm. The horizontal section of the conveyor belt will completely pull out the stored conveyor belt under the traction of the front driving device. Once refrigeration occurs, cold shrinkage will occur in the metal. If the conveyor belt cannot release and offset the shrinkage amount, it will be torn and damaged due to excessive tension, shortening the service life of the conveyor belt. Summary of the Invention

[0004] In view of the above problems existing in the prior art, the present application provides a pendulum type tensioning device.

[0005] The technical solution of the present invention is as follows: A pendulum type tensioning device includes a tensioning base, the tensioning base is connected with a positioning frame, the left end of the positioning frame is hinged to the left end of a bracket through a pin shaft, the right end of the positioning frame is hinged to the right end of the bracket through a rotating cam, a proximity switch is assembled to the rotating cam through a mounting frame and a locking nut, a rotating frame is suspended and connected to the bracket, a sleeve frame is assembled between the rotating frame and the tensioning base, the bottom of the tensioning base is connected with a first flat steel plate through a support plate, and the first flat steel plate is connected with a second flat steel plate and a third flat steel plate.

[0006] As a preferred embodiment of the present invention: a support frame is arranged between the tensioning base, the second flat steel plate and the third flat steel plate.

[0007] As a preferred embodiment of the present invention: reinforcing bars are arranged inside the support frame.

[0008] As a preferred embodiment of the present invention: positioning plates are connected to the second flat steel plate and the third flat steel plate.

[0009] As a preferred embodiment of the present invention: a foot cup is assembled on the flat steel plate one.

[0010] As a preferred embodiment of the present invention: a round steel one is provided at the top of the rotating frame, a round steel two is provided at the top of the tensioning base, and a pressure rod is provided at the bottom of the rotating frame.

[0011] The beneficial effects of the present invention are as follows: The conveyor belt presses into the horizontal section from the vertical section along the gap between the tensioning base and the rotating frame by its own weight. The rotating frame can ensure that the conveyor belt slides into the horizontal section naturally and prevent jamming faults at the same time. The conveyor belts in the horizontal section are in an overlapping state and arranged side by side. Under the pulling force of the front driving device, the stacked conveyor belts are continuously pulled out, so that the total running length of the conveyor belt remains constant; if there is a surplus length of the conveyor belt stored in the horizontal section, since the vertical section and the front driving device are isolated by the horizontal section, the conveyor belt in the vertical section is completely free from pulling force; if there is no surplus length of the conveyor belt stored in the horizontal section, at this time, the rotating frame rotates clockwise under the action of the horizontal pulling force, driving the rotating cam to rotate clockwise and triggering the proximity switch to send out a stop alarm. After the maintenance personnel check and eliminate the fault, they reset and restart the machine, so that there is a surplus length of the conveyor belt stored in the horizontal section, thereby ensuring that the conveyor belt is always in a suitable pre-tensioned state, extending the service life of the conveyor belt, and being safe and reliable. Description of the Drawings

[0012] Figure 1 Is a perspective view of a pendulum type tensioning device of the present invention; Figure 2 Is the front view of the present invention; Figure 3 Is the right view of the present invention; Figure 4 Is a schematic structural diagram of the present invention when the conveyor belt is installed; Figure 5 Is an enlarged view of part A; Figure 6 Is an overlapping state diagram of the conveyor belt; Figure 7 Is an unfolded state diagram of the conveyor belt.

[0013] In the figure: 1 - rotating frame; 2 - proximity switch; 3 - rotating cam; 4 - tensioning base; 5 - positioning frame; 6 - pin shaft; 7 - bracket; 8 - round steel one; 9 - sleeve frame; 10 - pressure rod; 11 - support plate; 12 - flat steel plate one; 13 - foot cup; 14 - flat steel plate two; 15 - flat steel plate three; 16 - support frame; 17 - strengthening rod; 18 - positioning plate; 19 - mounting frame; 20 - locking nut; 21 - round steel two. Detailed Embodiments

[0014] The present invention will be specifically described below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts fall within the scope of protection of the present invention.

[0015] As Figure 1-7 shown, a pendulum type tensioning device includes a tensioning base 4, the tensioning base 4 is connected with a positioning frame 5, the left end of the positioning frame 5 is hinged to the left end of a bracket 7 through a pin shaft 6, the right end of the positioning frame 5 is hinged to the right end of the bracket 7 through a rotating cam 3, a proximity switch 2 is assembled to the rotating cam 3 through a mounting frame 19 and a locking nut 20, a rotating frame 1 is suspended and connected to the bracket 7, a sleeve frame 9 is assembled between the rotating frame 1 and the tensioning base 4, the bottom of the tensioning base 4 is connected with a first flat steel plate 12 through a support plate 11, and the first flat steel plate 12 is connected with a second flat steel plate 14 and a third flat steel plate 15.

[0016] A support frame 16 is arranged between the tensioning base 4, the second flat steel plate 14 and the third flat steel plate 15, and the support frame 16 improves the supporting force for the tensioning base 4; a reinforcing rod 17 is arranged inside the support frame 16 to ensure the structural stability; the second flat steel plate 14 and the third flat steel plate 15 are connected with a positioning plate 18 to facilitate accurate positioning; a foot cup 13 is assembled to the first flat steel plate 12, and the height of the foot cup 13 is changed through a rotating screw rod to facilitate height adjustment; a first round steel 8 is arranged at the top end of the rotating frame 1, a second round steel 21 is arranged at the top end of the tensioning base 4, and a pressure rod 10 is arranged at the bottom end of the rotating frame 1, which improves the smoothness when the conveying mesh belt is pressed from the vertical section into the horizontal section.

[0017] During operation, the conveying mesh belt uses its own weight to press from the vertical section into the horizontal section along the gap between the tensioning base 4 and the rotating frame 1. The rotating frame 1 can ensure that the conveying mesh belt naturally slides into the horizontal section, and at the same time prevent jamming faults. The conveying mesh belts in the horizontal section are in an overlapping state and arranged with each other. Under the pulling force of the front drive device, the stacked conveying mesh belts are continuously pulled out, so that the total running length of the conveying mesh belt remains constant; if there is a surplus length of the conveying mesh belt stored in the horizontal section, since the vertical section is isolated from the front drive device by the horizontal section, the conveying mesh belt in the vertical section is completely not affected by the pulling force; if there is no surplus length of the conveying mesh belt stored in the horizontal section, at this time, the rotating frame 1 rotates clockwise under the action of the horizontal pulling force, drives the rotating cam 3 to rotate clockwise and triggers the proximity switch 2 to send out a stop alarm. After the maintenance personnel check and eliminate the fault and then reset, restart the machine to make the horizontal section store a surplus length of the conveying mesh belt, and the surplus length is preferably 1000 mm, so as to ensure that the conveying mesh belt is always in a proper pre-tensioned state, avoid being torn and damaged, and extend the service life of the conveying mesh belt.

[0018] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, for those of ordinary skill in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to specific details.

Claims

1. A pendulum type tensioning device, characterized in that: The invention comprises a tensioning base (4), the tensioning base (4) being connected to a positioning frame (5), the left end of the positioning frame (5) being hinged to the left end of a bracket (7) via a pin shaft (6), the right end of the positioning frame (5) being hinged to the right end of the bracket (7) via a rotating cam (3), the rotating cam (3) being equipped with a proximity switch (2) via a mounting frame (19) and a locking nut (20), a rotating frame (1) being suspended on the bracket (7), the rotating frame (1) and the tensioning base (4) being equipped with a sleeve frame (9), the bottom of the tensioning base (4) being connected to a flat steel plate 1 (12) via a supporting plate (11), the flat steel plate 1 (12) being connected to a flat steel plate 2 (14) and a flat steel plate 3 (15).

2. The pendulum type tensioning device according to claim 1, characterized in that: A support frame (16) is provided between the tensioning base (4), the second flat steel plate (14) and the third flat steel plate (15).

3. The pendulum type tensioning device according to claim 2, characterized in that: A reinforcing rod (17) is provided inside the support frame (16).

4. The pendulum type tensioning device according to claim 1, characterized in that: The second flat steel plate (14) and the third flat steel plate (15) are connected with a positioning plate (18).

5. The pendulum type tensioning device according to claim 1, characterized in that: The flat steel plate 1 (12) is equipped with a foot cup (13).

6. The pendulum type tensioning device according to any one of claims 1 to 5, characterized in that: A round steel bar 1 (8) is arranged at the top end of the rotating frame (1), a round steel bar 2 (21) is arranged at the top end of the tensioning base (4), and a pressure rod (10) is arranged at the bottom end of the rotating frame (1).

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