Tensioning wheel

Abstract

The utility model relates to a tensioning wheel which comprises an inner ring, an outer ring and an oil injection assembly, the outer ring is hollow, the inner ring, the outer ring and the oil injection assembly are coaxially arranged, and a plurality of ball sets are symmetrically arranged between the outer ring and the inner ring in the axis direction; the outer ring and the inner ring are sequentially sleeved from outside to inside, and a cavity is formed between the outer ring and the inner ring; the oil injection assembly comprises an oil injection piece, an oil outlet part and an oil injection nozzle, the inner ring is provided with an oil groove corresponding to the oil outlet part, the oil groove is formed in the middle of the multiple ball sets, and the oil groove is communicated with the cavity. One purpose of the utility model is that the internal ball group can be fully lubricated when the tensioning wheel is lubricated.

Description

Technical Field

[0001] This utility model relates to textile machinery, and more specifically, to a tensioning wheel. Background Technology

[0002] Tensioners play a vital role in the textile industry, primarily used to regulate fabric tension, ensuring stable production processes and improving product quality.

[0003] The tensioning wheel applies pressure to the fabric using an elastic tension mechanism and its own weight, achieving automatic tensioning. Simultaneously, the tension can be controlled by adjusting the position of the balance block, ensuring the fabric is in optimal condition for subsequent processing.

[0004] In existing technologies, common tensioners include an inner bearing ring and an outer bearing ring. The fixed shaft, bearing, and inner ring are fixed together. A cavity is provided between the inner and outer bearing rings, and multiple ball bearing sets are arranged within the cavity. Grooves are formed on the inner and outer bearing rings corresponding to the positions of the ball bearing sets. Dust covers are provided at both ends of the tensioner. An oil outlet is provided on the dust cover away from the fixed shaft. A spring plate is provided at the end of the tensioner away from the fixed shaft, and the spring plate is positioned between the dust cover and the inner bearing ring. When the tensioner is working, the belt is sleeved on the outer bearing ring. The position of the tensioner is adjusted according to the belt tension to achieve the tensioning effect.

[0005] During operation, the fixed shaft and the inner ring of the bearing are relatively stationary, while the belt abuts against the outer surface of the outer ring of the bearing; the outer ring of the bearing rotates with respect to the inner ring via a ball bearing assembly; as the belt moves, it drives the outer ring of the bearing to rotate.

[0006] The tensioner can be placed in a single configuration; it can be placed horizontally or vertically with its axis fixed.

[0007] In the existing technology, when injecting oil, the oil gun is first aligned with the oil outlet of the dust cover, and the oil gun is inserted into the oil outlet. The spring plate set in the tensioner pulley is pushed open to the side away from the oil outlet. The spring plate has the elastic potential energy to close the oil outlet, thereby injecting lubricating oil into the cavity of the tensioner pulley to achieve the lubrication effect.

[0008] The inventors believe that in the prior art, lubricating oil is injected into the tensioner through one end of the tensioner. The lubricating oil lubricates all the ball sets inside the tensioner and needs to be lubricated gradually along the axis of the tensioner. The longer the path, the weaker the capillary effect. The ball sets far from the tensioner are not adequately lubricated compared to the ball sets closer to the tensioner. Utility Model Content

[0009] One objective of this invention is to ensure that the internal ball bearing assembly is adequately lubricated during tensioner lubrication.

[0010] According to one aspect of this utility model, a tensioning wheel is provided.

[0011] Includes inner ring, outer ring, and oil injection components;

[0012] The outer ring is hollow, and the inner ring, the outer ring, and the oil injection assembly are coaxially arranged. Multiple ball bearing groups are symmetrically arranged between the outer ring and the inner ring along the axial direction.

[0013] The outer ring and the inner ring are sequentially nested from the outside to the inside, and a cavity is provided between the outer ring and the inner ring;

[0014] The oil injection assembly includes an oil injection component, an oil outlet, and an oil injection nozzle. The inner ring is provided with an oil groove corresponding to the oil outlet. The oil groove is located in the middle of multiple ball bearing groups, and the oil groove is interconnected with the cavity.

[0015] Optionally, the oil outlet is coaxially arranged with the inner ring, and one end of the oil injection component is provided with at least two oil outlet holes, which are located in the oil trough.

[0016] Optionally, the oil filling nozzle is hollow and contains a steel ball. The steel ball abuts against the inner wall of the oil filling nozzle, and the steel ball is used to close the oil filling nozzle at least.

[0017] Optionally, a spring is provided inside the oil injection nozzle, the spring is coaxially arranged with the oil injection nozzle, the steel ball is disposed at one end of the spring, and the spring has the force to push the steel ball to close the oil injection nozzle.

[0018] Optionally, each of the oil outlet holes is arranged in an array along the axial direction of the oil injection component, each of the oil outlet holes is grooved around the circumference of the oil injection component, the circumferential groove angle of each of the oil outlet holes is 180°, each of the oil outlet holes is not located on the same horizontal plane, and the projected ends of each of the oil outlet holes are connected end to end.

[0019] Optionally, dust covers are provided at both ends of the inner ring, and the dust covers are used to seal at least both ends of the cavity.

[0020] Optionally, the oil nozzle is provided with a slot.

[0021] Optionally, each of the oil outlet holes is arranged in an array along the axial direction of the oil injection component, each of the oil outlet holes is grooved around the circumference of the oil injection component, the circumferential groove angle of each of the oil outlet holes is 120°, each of the oil outlet holes is not located on the same horizontal plane, and the projected ends of each of the oil outlet holes are connected end to end.

[0022] One technical advantage of this utility model is that...

[0023] In the prior art, the tensioner has multiple ball sets, and a stop is provided within the same ball set to limit the movement of the balls. The current oil injection method injects oil from the bottom of the tensioner, and the lubricating oil gradually lubricates from the bottom to the top to achieve the lubrication effect. In this invention, the lubricating oil is introduced into the oil groove, which is connected to the middle of the inner cavity of the roller. The ball sets are respectively set on both sides of the oil groove. The distance from the oil groove to the farthest ball set is shorter than that of the prior art. The lubricating oil is drawn in through capillary effect. The shorter distance allows the lubricating oil to lubricate more fully.

[0024] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0025] The accompanying drawings, which form part of this specification, illustrate embodiments of the present invention and, together with the specification, serve to explain the principles of the present invention.

[0026] Figure 1 This is a schematic diagram of a tensioner.

[0027] Figure 2 This is a partial schematic diagram of a tensioner pulley protruding oil injection component.

[0028] Figure 3 This is a cross-sectional view of a tensioner pulley protruding oil injection component.

[0029] Figure 4 This is a cross-sectional view of a tensioner.

[0030] Figure 5 This is a partial schematic diagram of another embodiment of a tensioner protruding oil injection component.

[0031] Figure descriptions: 1. Fixed shaft; 11. Spring pin; 21. Inner ring; 22. Outer ring; 23. Carrier; 24. Ball assembly; 25. Groove; 3. Dust cover; 4. Cavity; 5. Oil filling assembly; 51. Oil filling part; 52. Oil outlet; 53. Oil nozzle; 54. Oil groove; 55. Oil outlet hole; 56. Steel ball; 57. Spring; 58. Oil receiving cap; 59. Carrier groove; 6. Sealing ring.

[0032] In the accompanying drawings, the same parts are labeled with the same reference numerals; the drawings are not drawn to scale. Detailed Implementation

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0034] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0035] Technologies and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0036] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0037] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0038] Example

[0039] This utility model provides a tensioning wheel, such as Figure 1-4 As shown, it includes an inner ring 21, which is coaxially arranged with the fixed axis 1 of the machine tool. A spring pin 11 is provided on the inner ring 21. The axis of the spring pin 11 is parallel to the axis of the fixed axis 1 but not coaxial with the fixed axis 1.

[0040] like Figure 1-4 As shown, an outer ring 22 is coaxially arranged around the inner ring 21. The outer ring 22 has a hollow structure and a retainer 23 is provided outside the outer ring 22. The retainer 23 is fixed to the outer ring 22. Ball sets 24 are provided near both ends of the inner ring 21 and the outer ring 22. The inner ring 21 has a groove 25 corresponding to the position of the ball set 24, and the outer ring 22 has a groove 25 corresponding to the position of the ball set 24. A retainer is provided between each ball of the ball set 24.

[0041] In use, the fixed shaft 1 and the inner ring 21 remain stationary, while the outer ring 22 rotates with the inner ring 21 via the ball bearing assembly 24. When working, the belt is clamped on the clamp 23. When tensioned, the belt drives the clamp 23 to rotate, thereby causing the outer ring 22 to rotate relative to the inner ring 21.

[0042] like Figure 1-4 As shown, dust covers 3 are provided at both ends of the inner ring 21. The dust covers 3 are coaxially arranged with the inner ring 21. The inner ring 21, the outer ring 22 and the two dust covers 3 form a cavity 4, and the ball assembly 24 is disposed in the cavity 4.

[0043] In this invention, an inner ring 21, an outer ring 22, and two dust covers 3 form a cavity 4. The ball assembly 24 is disposed in the cavity 4, which reduces the contact between the ball assembly 24 and external dust and air. During lubrication, a small amount of lubricating oil can be stored in the cavity 4, which reduces the chance of damage and the frequency of maintenance in subsequent maintenance.

[0044] like Figure 1-4 As shown, an oil injection component 5 is provided at the end of the inner ring 21 away from the fixed axis 1. The oil injection component 5 includes an oil injection part 51, an oil outlet part 52 and an oil injection nozzle 53. The oil injection part 51, the oil outlet part 52 and the oil injection nozzle 53 are integrally formed and are hollow.

[0045] like Figure 1-4 As shown, the oil outlet 52 is located at the end of the oil injection component 51 away from the fixed shaft 1, and the oil injection nozzle 53 is located at the end of the oil injection component 51 away from the oil outlet 52. The oil injection component 51 is coaxially arranged with the inner ring 21. The oil injection component 51 has a hollow structure and is inserted into the inner ring 21.

[0046] like Figure 1-4 As shown, an oil groove 54 is provided in the inner ring 21 corresponding to the oil outlet 52. The opening direction of the oil groove 54 is perpendicular to the axis of the inner ring 21. The oil groove 54 is connected to the cavity 4. The oil groove 54 is located in the middle of the inner ring 21. The ball bearing assembly 24 is symmetrically arranged on both sides of the oil groove 54 with the oil groove 54 as the starting point.

[0047] In this invention, lubricating oil is introduced into the oil groove 54. The oil groove 54 and the cavity 4 are respectively arranged on both sides of the oil groove 54 by the ball assembly 24. The distance between the oil groove 54 and the farthest ball assembly 24 is relatively short. The lubricating oil is drawn in through capillary effect. The short distance allows the lubricating oil to lubricate more fully.

[0048] like Figure 1-4 As shown, the length of the oil outlet 52 is equal to the width of the oil groove 54. The oil outlet 52 has two oil outlet holes 55. Each oil outlet hole 55 is arranged in an array along the axial direction of the oil injection component 51. Each oil outlet hole 55 is grooved around the circumference of the oil injection component 51. The circumferential groove angle of each oil outlet hole 55 is 180°. Each oil outlet hole 55 is not located on the same horizontal plane, and the projected ends of each oil outlet hole 55 are connected end to end.

[0049] like Figure 5 As shown in one embodiment, the oil outlet 52 has three oil outlet holes 55, which are arranged in an array along the axial direction of the oil injection component 51. Each oil outlet hole 55 has a groove along the circumference of the oil injection component 51, and the circumferential groove angle of each oil outlet hole 55 is 120°. The oil outlet holes 55 are not located on the same horizontal plane, and the projected ends of each oil outlet hole 55 are connected end to end.

[0050] like Figure 1-4As shown, a steel ball 56 is provided inside the grease nipple 53. The inner wall of the grease nipple 53 has a limiting measure for the steel ball 56 to prevent it from detaching from the grease nipple 53. The steel ball 56 abuts against the inner wall of the grease nipple 53. A spring 57 is provided inside the grease nipple 53. The spring 57 is coaxially arranged with the grease nipple 53. The steel ball 56 is located at the end of the spring 57 away from the fixed axis 1. The other end of the spring 57 abuts against the end of the inner wall of the grease nipple 53 close to the fixed axis 1. Under normal conditions, the spring 57 has a tendency to push the steel ball 56 to move away from the fixed axis 1. Under working conditions, the steel ball 56 can move along the axial direction of the grease injection component 51 to allow lubricating oil to enter the grease injection component 51 through the grease nipple 53.

[0051] like Figure 1-4 As shown, the oil nozzle 53 is provided with an oil receiving cap 58 on the outer surface of the inner ring 21; the oil receiving cap 58 is coaxially arranged with the oil filling part 51, the oil receiving cap 58 is fixed to the oil nozzle 53, the oil receiving cap 58 abuts against the inner ring 21, and the oil receiving cap 58 is adjacent to the outer ring 22; the oil nozzle 53 is provided with a slot 59 on the outside.

[0052] like Figure 1-4 As shown, a sealing ring 6 is provided at one end of the inner ring 21 near the fixed shaft 1. The axis of the sealing ring 6 is coaxial with the fixed shaft 1. The sealing ring 6 is fitted onto the inner ring 21 and is interference-fitted with the outer ring 22 to seal the inner ring 21 and the outer ring 22. In use, it is used to prevent external condensate and dust from entering the inner ring 21 and the outer ring 22, reduce external contamination of the tensioner, and extend the life of the tensioner.

[0053] In use, the grease nipple 53 differs from the oil outlet 55 of the prior art. The grease nipple 53 is located outside the tensioning wheel. At the same time, when the axis of the tensioning wheel is vertically set or in a position that is difficult to see, the grease nipple 53 can be touched through the grease nipple 53 located outside the tensioning wheel, so as to achieve blind installation. A rubber sleeve with the same radius as the grease nipple 53 is installed on the grease gun. When grease is injected, the end of the rubber sleeve is fitted into the grease head groove 59 to reduce the leakage of lubricating oil during grease injection. At the same time, when inserting and removing the grease gun, the leaked lubricating oil can be caught by the rubber sleeve.

[0054] When the grease gun is used for grease filling, the steel ball 56 is pushed into the grease nozzle 53, compressing the spring 57, so that the spring 57 has the force to push the spring 57 to return to its original position; the lubricating oil is injected into the grease nozzle 53 to realize the injection of lubricating oil; when the grease gun is pulled out, the spring 57 pushes the steel ball 56 to return to its original position, realizing the return of the grease nozzle 53 to its original position. The oil cap 58 abuts against the inner ring 21, and the oil cap 58 is adjacent to the outer ring 22 but not connected, reducing the chance of dust entering between the outer ring 22 and the inner ring 21.

[0055] The tensioner design provided by this utility model has significant effects and advantages, mainly reflected in the following aspects:

[0056] 1. Dustproof and lubrication performance: The inner ring 21, outer ring 22 and dust covers 3 at both ends together form a closed cavity 4, in which the ball assembly 24 is set. This greatly reduces the direct contact between the ball assembly 24 and external dust and air, effectively extending the service life of the ball assembly 24. At the same time, the cavity 4 stores a small amount of lubricating oil to ensure that the ball assembly 24 receives continuous and uniform lubrication during operation, further reducing wear and failure rate, and lowering the maintenance cost and repair frequency of the equipment.

[0057] 2. Innovative oil injection system: The system adopts an integrated structure of oil injection component 51, oil outlet 52, and oil nozzle 53, and is equipped with multiple oil outlet holes 55. The oil outlet holes 55 are arrayed along the axial direction of the oil injection component 51 and are grooved in the circumferential direction to ensure uniform distribution and effective penetration of lubricating oil. The different height settings of the oil outlet holes 55 and the connection of their projected ends allow the lubricating oil to more comprehensively cover the ball assembly 24 and its surrounding area. In addition, the steel ball 56 and spring 57 structure in the oil nozzle 53 ensure smooth oil injection and automatically reset after oil injection to prevent lubricating oil leakage.

[0058] 3. Easy to maintain and operate: The position of the grease nipple 53 allows for blind operation by touch even when the tensioner wheel axis is vertical or difficult to observe directly; this improves work efficiency and reduces lubricant leakage caused by improper operation; at the same time, the groove 59 on the outside of the grease nipple 53, when used with a rubber sleeve of the corresponding size, further enhances the stability and accuracy of the grease injection process, reducing lubricant waste and environmental pollution.

[0059] In summary, the tensioner design provided by this utility model performs excellently in terms of dust prevention, lubrication, maintenance, and structural compactness, providing new ideas and technical support for equipment upgrades and modifications in related fields.

[0060] While specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A tensioner, characterized in that, Includes inner ring (21), outer ring (22), and oil injection assembly (5); The outer ring (22) is hollow, and the inner ring (21), the outer ring (22) and the oil injection assembly (5) are coaxially arranged. Multiple ball bearing groups (24) are symmetrically arranged between the outer ring (22) and the inner ring (21) along the axial direction. The outer ring (22) and the inner ring (21) are sequentially fitted from the outside to the inside, and a cavity (4) is provided between the outer ring (22) and the inner ring (21); The oil injection assembly (5) includes an oil injection part (51), an oil outlet (52) and an oil injection nozzle (53). The inner ring (21) is provided with an oil groove (54) corresponding to the oil outlet (52). The oil groove (54) is located in the middle of multiple ball bearing groups (24). The oil groove (54) is interconnected with the cavity (4).

2. A tensioner according to claim 1, characterized in that, The oil outlet (52) is coaxially arranged with the inner ring (21), and the oil injection component (51) has at least two oil outlet holes (55) at one end, which are located in the oil groove (54).

3. A tensioner according to claim 1, characterized in that, The oil filling nozzle (53) is hollow and contains a steel ball (56). The steel ball (56) abuts against the inner wall of the oil filling nozzle (53). The steel ball (56) is used to close the oil filling nozzle (53).

4. A tensioner according to claim 3, characterized in that, A spring (57) is provided inside the oil injector (53). The spring (57) is arranged coaxially with the oil injector (53). The steel ball (56) is arranged at one end of the spring (57). The spring (57) has the force to push the steel ball (56) to close the oil injector (53).

5. A tensioner according to claim 2, characterized in that, Each of the oil outlet holes (55) is arranged in an array along the axial direction of the oil injection component (51). Each of the oil outlet holes (55) has a circumferential groove along the oil injection component (51). The circumferential groove angle of each of the oil outlet holes (55) is 180°. Each of the oil outlet holes (55) is not located on the same horizontal plane, and the projected ends of each of the oil outlet holes (55) are connected end to end.

6. A tensioner according to claim 1, characterized in that, Dust covers (3) are provided at both ends of the inner ring (21), and the dust covers (3) are used to seal at least both ends of the cavity (4).

7. A tensioner according to claim 1, characterized in that, The oil nozzle (53) is provided with a slot (59).

8. A tensioner according to claim 2, characterized in that, Each of the oil outlet holes (55) is arranged in an array along the axial direction of the oil injection component (51). Each of the oil outlet holes (55) has a circumferential groove along the oil injection component (51). The circumferential groove angle of each of the oil outlet holes (55) is 120°. Each of the oil outlet holes (55) is not located on the same horizontal plane, and the projected ends of each of the oil outlet holes (55) are connected end to end.

Images