Middle automatic tensioning device

Abstract

The utility model relates to a middle automatic tensioning device which comprises a conveying device and a belt arranged on the outer side of the conveying device in a transmission mode, a guiding piece is installed on the outer side of the conveying device, and a tensioning wheel set which is perpendicular to the conveying device and conducts sliding adjustment is installed in the guiding piece. A tensioning wheel set is installed in the sliding groove, a guide piece is installed in the sliding groove, a first belt wheel used for guiding a belt to be transmitted to the outer side of the tensioning wheel set is installed in the guide piece, and a reset spring used for driving the tensioning wheel set to move and adjusting tensioning of the belt is installed in the guide piece. The belt conveyed to the outer side of the second belt wheel acts on the reset spring through self tensioning force, so that the reset spring can be kept in a compressed state, when the belt is loosened, the tension action borne by the reset spring is reduced, the reset spring can reset, the second belt wheel moves to conduct tensioning adjustment on the belt, the belt adjusting process is full-automatic, and the belt adjusting efficiency is improved. The looseness degree of the belt can be sensed at any time for adjustment, and manpower is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of belt tensioning, in particular to a middle automatic tensioning device. Background Art

[0002] The middle tensioner is a device used for belt tensioning. Its main function is to adjust the belt tension, ensure the flatness of the belt, reduce the wear of the belt, and effectively prevent various problems caused by the belt being too loose or too tight, such as belt deviation and excessive stretching that cause conveyor system operation failures.

[0003] The existing belt tensioning device is generally adjusted manually. The belt is adjusted to be tightened or loosened according to the tension status of the belt during use. The manual adjustment of the tensioning device cannot be adjusted at any time according to the tension or tightness of the belt. The adjustment interval is irregular, resulting in the conveyor device being in use. The belt will still be in a loose or tight state for part of the time, which increases the wear of the belt and may even cause the belt to deviate, which is very inconvenient. Utility Model Content

[0004] Based on the above description, the utility model provides a middle automatic tensioning device to solve the problem that the existing tensioning device cannot sense the belt tension and tightness at any time for adjustment through manual control.

[0005] The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a middle automatic tensioning device, comprising a conveying device and a belt transmitted on the outside of the conveying device, a guide member is installed on the outside of the conveying device, a tensioning wheel group that is slidably adjusted perpendicular to the conveying device is installed in the guide member, a first pulley that guides the belt transmission on the outside of the tensioning wheel group is installed in the guide member, and a reset spring that drives the tensioning wheel group to move and adjusts the belt tension is installed in the guide member.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the guide member includes an assembly plate and a slide groove, the assembly plate is installed in the center of the outer side of the conveying device, the slide groove is opened in the center of the inner wall of the assembly plate away from each other on both sides, the slide groove is symmetrically distributed with the center of the assembly plate as the origin, and the slide groove is C-shaped.

[0008] Furthermore, the tensioning wheel group includes a shaft, a slider and a second pulley. The slider is C-shaped, and its shape and size are adapted to the size of the slide groove. The slider is installed at both ends of the shaft and slidably connected in the slide groove. The second pulley is installed in the center of the outer side of the shaft.

[0009] Furthermore, the first pulley is installed between two sides of the inner wall of the assembly plate that are far away from each other and is located on both sides of the slide groove. The first pulleys are symmetrically distributed with the center of the assembly plate as the origin.

[0010] Furthermore, the return spring is installed between the slider and one end of the inner wall of the slide groove close to the conveying device, the surface of the return spring is in contact with the inner wall of the slide groove, and the return spring is in a compressed state.

[0011] Furthermore, the belt is driven outside the conveying device and the second pulley, and bypasses the two first pulleys.

[0012] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0013] The utility model uses a tensioning wheel group and a return spring installed in the slide groove to cooperate with the first pulley. The return spring is in a compressed state, and the belt transmitted to the outside of the second pulley acts on the return spring through its own tensioning force, so that it can be kept in a compressed state. When the belt is slack, the tension effect on the return spring is reduced, and the displacement can be reset, and the second pulley can be moved to tension and adjust the belt to make it flat again on the outside of the conveying device. With the guidance of the first pulley, the belt transmitted to the outside of the second pulley can move smoothly toward the conveying device, which is convenient for use with the conveying device. The belt adjustment process is fully automated and can sense the slackness of the belt at any time to make adjustments, saving manpower, effectively controlling the wear of the belt during use, and avoiding the occurrence of conveying failures caused by belt tension imbalance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic cross-sectional structure diagram of a middle automatic tensioning device provided in an embodiment of the utility model;

[0015] Figure 2 This is a structural schematic diagram of the connection relationship between the belt and the tensioning wheel assembly in the embodiment of the utility model;

[0016] Figure 3 It is a schematic diagram of the exploded structure of the tensioning wheel group and the slideway in the embodiment of the utility model;

[0017] Figure 4 A schematic diagram of the structure of a middle automatic tensioning device provided in an embodiment of the utility model;

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Conveying device; 2. Guide member; 21. Assembly plate; 22. Slide groove; 3. First pulley; 4. Tensioning wheel set; 41. Shaft rod; 42. Sliding block; 43. Second pulley; 5. Return spring; 6. Belt. DETAILED DESCRIPTION

[0020] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0022] See also Figure 1-4 The utility model discloses a middle automatic tensioning device, comprising a conveying device 1 and a belt 6 driven on the outside of the conveying device 1, a guide member 2 is installed on the outside of the conveying device 1, a tensioning wheel group 4 is installed in the guide member 2 for sliding adjustment perpendicular to the conveying device 1, a first pulley 3 is installed in the guide member 2 for guiding the belt 6 to be driven on the outside of the tensioning wheel group 4, and a return spring 5 is installed in the guide member 2 for driving the tensioning wheel group 4 to move and adjust the tension of the belt 6.

[0023] See also Figure 1 The guide member 2 includes an assembly plate 21 and a slide groove 22. The assembly plate 21 is installed in the center of the outer side of the conveying device 1. The slide groove 22 is opened in the center of the inner wall of the assembly plate 21 away from each other on both sides. The slide grooves 22 are symmetrically distributed with the center of the assembly plate 21 as the origin. The slide groove 22 is C-shaped. The C-shaped setting of the slide groove 22 can fit the reset spring 5 through the inner arc surface to play a limiting role, so that the reset spring 5 can fit the inner wall of the slide groove 22 when it is active to keep the force vertical during the stretching and compression process, so as to avoid the reset spring 5 from bending due to uneven force and affecting subsequent use.

[0024] See also Figure 3 The tensioning wheel group 4 includes a shaft rod 41, a slider 42 and a second pulley 43. The slider 42 is C-shaped, and its shape and size are adapted to the size of the slide groove 22. The slider 42 is installed at both ends of the shaft rod 41 and is slidably connected in the slide groove 22. The second pulley 43 is installed in the center of the outer side of the shaft rod 41. The shaft rod 41 moves vertically along the slide groove 22 through the sliders 42 at both ends. Restricted by the sliding fit between the slide groove 22 and the slider 42, the shaft rod 41 will be vertical in the assembly plate 21 to avoid tilting, thereby ensuring the stability of the second pulley 43 outside the shaft rod 41 when transmitting the belt 6.

[0025] See also Figure 1The first pulley 3 is installed between the two sides of the inner wall of the assembly plate 21 that are far away from each other, and is located on both sides of the slide groove 22. The first pulleys 3 are symmetrically distributed with the center of the assembly plate 21 as the origin. The two first pulleys 3 can control the area of ​​the belt 6 that is deformed and protrudes toward the second pulley 43, so that the belt 6 can only be deformed and transmitted in the assembly plate 21, and the occupied space of the belt 6 is controlled, so that the belt 6 is still kept neat on the outside of the conveying device 1. After the belt 6 is tensioned and adjusted by the second pulley 43, the first pulley 3 can also smoothly transmit the belt 6 to the conveying device 1, ensuring the adaptability of the belt 6 to the transmission of the conveying device 1 after the tension adjustment.

[0026] See also Figure 1 The return spring 5 is installed between the slider 42 and the inner wall of the slide groove 22 close to the conveying device 1. The surface of the return spring 5 fits the inner wall of the slide groove 22, and the return spring 5 is in a compressed state. The belt 6 is transmitted on the outer side of the conveying device 1 and the second pulley 43, and bypasses the two first pulleys 3. The belt 6 transmitted to the outer side of the second pulley 43 acts on the return spring 5 through its own tensioning force, so that it can be kept in a compressed state. When the belt 6 is relaxed, the tension on the return spring 5 is reduced, resulting in a reset displacement, and the second pulley 43 is moved by the slider 42 to adjust the tension of the belt 6, so that the belt 6 is kept flat again on the outside of the conveying device 1. After the belt 6 is readjusted, it acts on the return spring 5 through the tensioning force to keep it at the current compression height. The process of adjusting the tension of the belt 6 by the return spring 5 is fully automated, and the relaxation degree of the belt 6 can be sensed at any time for adjustment, saving manpower.

[0027] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" etc. specify the presence of stated features, wholes, steps, operations, components, parts or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts or combinations thereof.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A middle automatic tensioning device, comprising a conveying device (1) and a belt (6) driven on the outside of the conveying device (1), characterized in that: A guide member (2) is installed on the outside of the conveying device (1), and a tensioning wheel group (4) is installed in the guide member (2) for sliding adjustment perpendicular to the conveying device (1). A first pulley (3) is installed in the guide member (2) for guiding the belt (6) to be transmitted on the outside of the tensioning wheel group (4), and a return spring (5) is installed in the guide member (2) for driving the tensioning wheel group (4) to move and adjusting the tension of the belt (6).

2. The middle automatic tensioning device according to claim 1, characterized in that: The guide member (2) comprises an assembly plate (21) and a slide groove (22); the assembly plate (21) is installed at the center of the outer side of the conveying device (1); the slide groove (22) is opened at the center of the inner wall of the assembly plate (21) away from each other on both sides; the slide groove (22) is symmetrically distributed with the center of the assembly plate (21) as the origin; and the slide groove (22) is C-shaped.

3. The middle automatic tensioning device according to claim 2, characterized in that: The tensioning wheel group (4) comprises a shaft (41), a slider (42) and a second pulley (43); the slider (42) is C-shaped, and its shape and size are adapted to the size of the slide groove (22); the slider (42) is installed at both ends of the shaft (41) and is slidably connected in the slide groove (22); the second pulley (43) is installed at the center of the outer side of the shaft (41).

4. The middle automatic tensioning device according to claim 3 is characterized in that: The first pulley (3) is installed between two sides of the inner wall of the assembly plate (21) that are far away from each other and is located on both sides of the slide groove (22). The first pulley (3) is symmetrically distributed with the center of the assembly plate (21) as the origin.

5. The middle automatic tensioning device according to claim 3, characterized in that: The return spring (5) is installed between the slider (42) and the inner wall of the slide groove (22) close to one end of the conveying device (1), the surface of the return spring (5) is in contact with the inner wall of the slide groove (22), and the return spring (5) is in a compressed state.

6. The middle automatic tensioning device according to claim 3, characterized in that: The belt (6) is driven on the outside of the conveying device (1) and the second pulley (43), and bypasses the two first pulleys (3).

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