Novel V-belt tensioning device

Abstract

The utility model discloses a novel V-belt tensioning device which comprises a hood side plate, and a small belt wheel and a V-belt tensioning mechanism are respectively arranged outside the hood side plate. The V-belt tensioning mechanism comprises a tensioning plate, a positioning disc mounting hole is formed in the tensioning plate, a positioning disc is arranged in the positioning disc mounting hole, the tensioning plate rotates around the positioning disc, a pressing disc is arranged outside the positioning disc, the positioning disc is fixed to a machine cover side plate through the pressing disc, a large belt wheel is fixedly arranged on the pressing disc, and the large belt wheel is fixed to the machine cover side plate. A V-shaped belt is arranged between the large belt wheel and the small belt wheel, a bearing sleeve is further arranged on the tensioning plate, a bearing is arranged outside the bearing sleeve, a tensioning wheel is arranged outside the bearing, and the tensioning wheel is pressed on the outer side of the V-shaped belt. The tensioning plate rotates around the positioning disc and coincides with the rotation center of the large belt wheel, and it is guaranteed that the axis of the tensioning wheel is perpendicular to the movement direction of the V belt and parallel to the axis of the belt wheel, so that surface abrasion of the V belt is reduced, the transmission efficiency of the V belt is improved, and the use performance of equipment is improved.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, specifically to a novel V-belt tensioning device. Background Technology

[0002] In V-belt drives of agricultural machinery, in order to ensure the normal operation of the V-belt drive, a V-belt tensioning device is commonly used to tension the V-belt. The tensioning pulley is placed on the outside of the slack side of the V-belt so that the V-belt is only subjected to unidirectional bending. At the same time, the tensioning pulley is placed as close as possible to the small pulley to prevent slippage due to the pulley wrap angle being too small.

[0003] Currently, V-belt tensioning devices have the following problems: the parallelism between the V-belt tensioning pulley shaft and the pulley shaft, as well as the perpendicularity to the direction of V-belt movement, do not meet the design requirements; the belt surface is severely worn, which can lead to V-belt slippage, affecting the performance of the equipment and reducing transmission efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a novel V-belt tensioning device that addresses the shortcomings and deficiencies of existing technologies.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a novel V-belt tensioning device, comprising a machine cover side plate, the innovation of which lies in: a small pulley and a V-belt tensioning mechanism are respectively arranged on the outside of the machine cover side plate; the V-belt tensioning mechanism includes a tensioning plate, a positioning plate mounting hole is formed on the tensioning plate, a positioning plate is arranged inside the positioning plate mounting hole, the tensioning plate rotates around the positioning plate, a pressure plate is arranged on the outside of the positioning plate and fixed to the machine cover side plate by the pressure plate, a large pulley is fixedly arranged on the pressure plate, a V-belt is arranged between the large pulley and the small pulley, a bearing sleeve is also arranged on the tensioning plate, a bearing is arranged on the outside of the bearing sleeve, a tensioning wheel is arranged on the outside of the bearing, and the tensioning wheel presses against the outside of the V-belt.

[0006] Furthermore, a bushing is provided at the top of the tensioning plate, and a tensioning shaft is provided inside the bushing. A through hole is opened laterally on the end face of the tensioning shaft, and a tensioning rod is inserted through the through hole and fixed by two left and right limit nuts. A tensioning support, a washer, a spring, and an adjusting nut are respectively sleeved on the outside of the tensioning rod. The tensioning support is fixedly connected to the side plate of the machine cover. The spring is located between the washer and the adjusting nut. An arc-shaped hole is opened on the side plate of the machine cover for the bushing to move.

[0007] Furthermore, ventilation holes are provided inside the tensioning wheel.

[0008] The beneficial effects of this utility model after adopting the above structure are as follows:

[0009] (1) This utility model ensures that the tensioning plate rotates around the positioning plate and coincides with the rotation center of the large pulley, thereby ensuring that the axis of the tensioning wheel is perpendicular to the direction of V-belt movement and parallel to the axis of the pulley, thus reducing wear on the surface of the V-belt, improving the efficiency of V-belt transmission, and improving the performance of the equipment.

[0010] (2) This utility model utilizes a spring to adjust the tension, which is automatically and timely adjusted according to the elongation of the V-belt, without the need for manual real-time adjustment, thus protecting the V-belt.

[0011] (3) This utility model can be matched with the V-belt drive system of straw return machine and mower through structural matching. It is easy and convenient to install and has stable and reliable transmission performance.

[0012] (4) The tensioning wheel of this utility model is provided with ventilation holes to facilitate heat dissipation and extend service life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a front view of the V-belt tensioning mechanism in this utility model;

[0015] Figure 3 This is a side view of the V-belt tensioning mechanism in this utility model;

[0016] Figure 4 This is a top view of the V-belt tensioning mechanism in this utility model;

[0017] Figure 5 for Figure 2 Sectional view of AA;

[0018] Figure 6 This is a schematic diagram of the tensioning plate in this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Side plate of machine cover; 11. Arc-shaped hole; 2. Small pulley; 3. V-belt tensioning mechanism; 31. Tensioning plate; 32. Positioning plate mounting hole; 33. Positioning plate; 34. Pressure plate; 35. Large pulley; 36. V-belt; 37. Bearing sleeve; 38. Bearing; 39. Tensioning wheel; 310. Shaft sleeve; 311. Tensioning shaft; 312. Tensioning rod; 313. Limit nut; 314. Tensioning support; 315. Washer; 316. Spring; 317. Adjusting nut. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model and are not intended to limit the present utility model.

[0023] See Figure 1-6 A novel V-belt tensioning device includes a machine cover side plate 1. A small pulley 2 and a V-belt tensioning mechanism 3 are respectively arranged on the outside of the machine cover side plate 1. The V-belt tensioning mechanism 3 includes a tensioning plate 31 with a positioning plate mounting hole 32. A positioning plate 33 is arranged inside the mounting hole of the positioning plate 32. The tensioning plate 31 rotates around the positioning plate 33. A pressure plate 34 is arranged on the outside of the positioning plate 33 and is fixed to the machine cover side plate 1 by the pressure plate 34. A large pulley 35 is fixed on the pressure plate 34. A V-belt 36 is arranged between the large pulley 35 and the small pulley 2. A bearing sleeve 37 is also arranged on the tensioning plate 31. A bearing 38 is arranged on the outside of the bearing sleeve 37. A tensioning wheel 39 is arranged on the outside of the bearing 38 and presses the outside of the V-belt 36. Specifically, the tensioning plate 31 rotates around the positioning disc 33 and coincides with the rotation center of the large pulley 35, ensuring that the axis of the tensioning pulley is perpendicular to the direction of V-belt movement and parallel to the axis of the pulley, thereby reducing wear on the V-belt surface, improving V-belt transmission efficiency, and enhancing the performance of the equipment.

[0024] In this embodiment, a bushing 310 is provided on the top of the tensioning plate 31, and a tensioning shaft 311 is provided inside the bushing 310. A through hole is opened laterally on the end face of the tensioning shaft 311, and a tensioning rod 312 is inserted through the through hole and fixed by two left and right limit nuts 313. A tensioning support 314, a washer 315, a spring 316, and an adjusting nut 317 are respectively sleeved on the outside of the tensioning rod 312. The tensioning support 314 is fixedly connected to the side plate 1 of the machine cover. The spring 316 is located between the washer 315 and the adjusting nut 313. An arc-shaped hole 11 for the bushing to move is opened on the side plate 1 of the machine cover. When the tensioning plate 31 rotates, the tension force is adjusted by the spring 316, which automatically adjusts in time with the elongation of the V-belt 36 without the need for manual real-time adjustment, thus protecting the V-belt. The adjusting nut 313 is used to adjust the elasticity of the spring 316, thereby selecting a suitable elasticity to meet the usage requirements.

[0025] In this embodiment, ventilation holes are provided inside the tensioning pulley 39. These ventilation holes facilitate heat dissipation from the inside of the tensioning pulley 39, extending its service life.

[0026] The above description is only used to illustrate the technical solution of this utility model and is not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.

Claims

1. A novel V-belt tensioning device, comprising a machine cover side plate, characterized in that: The outer side panel of the machine cover is respectively provided with a small pulley and a V-belt tensioning mechanism; the V-belt tensioning mechanism includes a tensioning plate, a positioning plate mounting hole is opened on the tensioning plate, a positioning plate is set inside the positioning plate mounting hole, the tensioning plate rotates around the positioning plate, a pressure plate is set outside the positioning plate and fixed to the side panel of the machine cover by the pressure plate, a large pulley is fixedly set on the pressure plate, a V-belt is set between the large pulley and the small pulley, a bearing sleeve is also set on the tensioning plate, a bearing is set outside the bearing sleeve, a tensioning wheel is set outside the bearing, and the tensioning wheel presses against the outside of the V-belt.

2. The novel V-belt tensioning device according to claim 1, characterized in that: A bushing is provided at the top of the tensioning plate, and a tensioning shaft is provided inside the bushing. A through hole is opened laterally on the end face of the tensioning shaft, and a tensioning rod is inserted through the through hole and fixed by two left and right limit nuts. A tensioning support, a washer, a spring, and an adjusting nut are respectively sleeved on the outside of the tensioning rod. The tensioning support is fixedly connected to the side plate of the machine cover. The spring is located between the washer and the adjusting nut. An arc-shaped hole is provided on the side plate of the machine cover for the bushing to move.

3. The novel V-belt tensioning device according to claim 1, characterized in that: Ventilation holes are provided inside the tensioning wheel.

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