Chain type tensioner

Abstract

The utility model belongs to the technical field of a tensioner of a feeding trolley of a metallurgical cooling bed, and particularly relates to a chain type tensioner. Comprising two connecting plates, the two ends between the two connecting plates are in interference penetrating connection with fixing shafts, the two fixing shafts are sleeved with sleeves, two side plates are hinged to the sleeves, a spiral sleeve is welded between the two side plates, and a pull rod is in threaded connection with the interior of the spiral sleeve. The tension device has certain deflection in the horizontal direction and the vertical direction, so that the force in the horizontal direction or the vertical direction borne by the tension device is buffered, the welding position of the pull rod is prevented from being cracked and fractured, a special wrench is not needed for tension, the working efficiency is high, and the working time is greatly saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tensioners for loading and unloading trolleys of metallurgical cooling beds, in particular to a chain tensioner. Background Art

[0002] There are three cooling beds in the finishing area of ​​the 4300 thick plate production line of the steel plant. The working process is as follows: the loading trolley transports the steel plate on the roller to the bed, and the steel plate is cooled to the shearing temperature and then steps through the cooling bed. The unloading trolley then transports the steel plate to the conveyor roller of the mother plate inspection table. At present, during the production process, the tensioner of the trolley may break and the whole group of trolleys may tilt, which requires shutdown and maintenance, restricting the production rhythm. The direct reason is that when the steel plate has irregular plate shapes with a large difference between the head and the tail, such as sickle bend and wave shape, after ensuring the edge alignment operation, the whole group of trolleys are out of sync, so the tension of the trolley tensioner is increased. Under the action of multiple alternating loads, the welding of the tensioner is welded and broken. Once a break occurs, the maintenance time is at least 30 minutes, resulting in less than 10 steel plates being fed. Summary of the invention

[0003] The purpose of the utility model is to provide a chain tensioner to solve the problems existing in the prior art.

[0004] The utility model solves the technical problem by adopting the following technical solution: a chain tensioner comprises a connecting plate, wherein there are two connecting plates, both ends of the two connecting plates are interference-connected with fixed shafts, the two fixed shafts are sleeved with sleeves, two side plates are hinged on the sleeves, a spiral sleeve is welded between the two side plates, and a pull rod is threadedly connected inside the spiral sleeve.

[0005] Furthermore, both ends of the connecting plate are semicircular, and through holes are provided at both ends of the connecting plate, and the fixed shaft is interference-connected in the through holes of the connecting plate.

[0006] Furthermore, the sleeve is in the shape of a round tube, and rotating shafts are welded on both the upper and lower sides of the sleeve.

[0007] Furthermore, one end of the side plate is semicircular, a through hole is opened at the semicircular end of the side plate, the other end of the side plate is welded to the side of the spiral sleeve, and the two side plates are hinged to the rotating shafts on both sides of the sleeve through the through holes.

[0008] Furthermore, the spiral sleeve is in the shape of a circular tube, the inner wall of the spiral sleeve is in the shape of an internal thread, and the internal threads of the two spiral sleeves are in opposite directions.

[0009] Furthermore, one end of the pull rod is in the shape of an external thread, and the directions of the external threads of the two pull rods correspond to the directions of the internal threads of the two spiral sleeves respectively.

[0010] The utility model has the following beneficial effects:

[0011] 1. The utility model has a certain deflection in the horizontal and vertical directions, so as to buffer the horizontal or vertical forces on the tensioner, thereby preventing the welding of the pull rod from being opened and broken, and does not require the use of a special wrench for tightening, which has high work efficiency and greatly saves work time.

[0012] 2. The sleeve can rotate on the fixed axis, and the side plate can rotate on the rotating axis, thereby generating a certain deflection in the horizontal and vertical directions, thereby buffering the horizontal or vertical force exerted on the tensioner.

[0013] 3. When tightening is required, insert the crowbar into the gap between the two connecting plates of the utility model to clamp the two connecting plates and rotate the crowbar. There is no need to use a special wrench for tightening, which has high work efficiency and greatly saves work time.

[0014] 4. The internal threads of the two spiral sleeves are in opposite directions. Therefore, when the crowbar is rotated, the two spiral sleeves rotate synchronously in the direction of tightening or loosening, thereby achieving tightening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model.

[0016] Figure 2 It is a schematic diagram of the structure of the utility model.

[0017] Among them: 1. connecting plate; 2. fixed shaft; 3. sleeve; 4. side plate; 5. spiral sleeve; 6. pull rod; 7. through hole; 8. rotating shaft; 9. through hole. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific embodiments and drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] like Figure 1-2 As shown, a chain tensioner includes a connecting plate 1. There are two connecting plates 1. Both ends of the two connecting plates 1 are interferingly connected with a fixed shaft 2. The two fixed shafts 2 are sleeved with a sleeve 3. Two side plates 4 are hinged on the sleeve 3. A spiral sleeve 5 is welded between the two side plates 4. A pull rod 6 is threaded inside the spiral sleeve 5.

[0020] Both ends of the connecting plate 1 are semicircular, and through holes 7 are provided at both ends of the connecting plate 1 . The fixed shaft 2 is inserted into the through holes 7 of the connecting plate 1 with interference fit.

[0021] The sleeve 3 is in the shape of a round tube, and a rotating shaft 8 is welded to both the upper and lower sides of the sleeve 3 .

[0022] One end of the side plate 4 is semicircular, and a through hole 9 is opened at the semicircular end of the side plate 4. The other end of the side plate 4 is welded to the side of the spiral sleeve 5. The two side plates 4 are hinged to the rotating shafts 8 on both sides of the sleeve 3 through the through holes 9.

[0023] The spiral sleeve 5 is in a round tube shape, and the inner wall of the spiral sleeve 5 is in an internal thread shape. The internal threads of the two spiral sleeves 5 are in opposite directions.

[0024] One end of the pull rod 6 is in the shape of an external thread, and the directions of the external threads of the two pull rods 6 correspond to the directions of the internal threads of the two spiral sleeves 5 respectively.

[0025] The working principle of the utility model is:

[0026] When in use, the utility model replaces the original tensioner for welding. When tightening is required, a crowbar is inserted into the gap between the two connecting plates 1 of the utility model to clamp the two connecting plates 1 and rotate the crowbar. Since the internal threads of the two spiral sleeves 5 are in opposite directions, when the crowbar is rotated, the two spiral sleeves 5 rotate synchronously in the direction of tightening or loosening, thereby achieving tightening. Compared with the existing tensioner, it does not need to use a special wrench for tightening, has high work efficiency, and greatly saves work time.

[0027] When the steel plate has an irregular plate shape with a large difference between the head and tail, such as sickle bend or wave shape, the tensioner will be subjected to horizontal or vertical forces. Since the sleeve 3 can rotate on the fixed shaft 2 and the side plate 4 can rotate on the rotating shaft 8, the utility model has a certain deflection in the horizontal and vertical directions, thereby buffering the horizontal or vertical forces on the tensioner, thereby preventing the welding of the pull rod 6 from opening and breaking.

[0028] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention shall fall within the scope of protection of the present invention.

[0029] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A chain tensioner, characterized in that: It includes two connecting plates, both ends of the two connecting plates are interference-connected with fixed shafts, the two fixed shafts are sleeved with sleeves, two side plates are hinged on the sleeves, a spiral sleeve is welded between the two side plates, and a pull rod is threaded inside the spiral sleeve.

2. The chain tensioner according to claim 1, characterized in that: The two ends of the connecting plate are semicircular, and through holes are arranged at the two ends of the connecting plate. The fixed shaft is interference-connected in the through holes of the connecting plate.

3. The chain tensioner according to claim 1, characterized in that: The sleeve is in the shape of a round tube, and rotating shafts are welded on both the upper and lower sides of the sleeve.

4. The chain tensioner according to claim 3, characterized in that: One end of the side plate is semicircular, a through hole is opened at the semicircular end of the side plate, and the other end of the side plate is welded to the side surface of the spiral sleeve. The two side plates are respectively hinged on the rotating shafts on both sides of the sleeve through the through holes.

5. The chain tensioner according to claim 1, characterized in that: The spiral sleeve is in the shape of a round tube, the inner wall of the spiral sleeve is in the shape of an internal thread, and the internal threads of the two spiral sleeves are in opposite directions.

6. The chain tensioner according to claim 5, characterized in that: One end of the pull rod is in the shape of an external thread, and the directions of the external threads of the two pull rods correspond to the directions of the internal threads of the two spiral sleeves respectively.

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