Tension adjusting device

Abstract

The utility model provides a tension adjusting device which comprises a body, a tensioner and a positioner, and the body is provided with a first axis and a supporting piece extending along the first axis; the tensioner comprises a base, a rolling ring and an adjusting seat, the base is provided with a supporting hole parallel to the second axis, the supporting hole is located at the eccentric position of the base, the supporting hole is arranged on the supporting piece in a sleeved mode, the rolling ring is in a circular hollow ring shape and arranged on the base in a sleeved mode and can generate a relative rotating motion relation, and the adjusting seat is provided with a pivot hole arranged on the supporting piece in a sleeved mode. The swing rod can swing by taking the first axis of the body as the center of a circle and is used for adjusting different positions of the rolling ring abutting against the flexible transmission element; the positioner comprises a positioning piece arranged on the body and a plurality of adjusting holes formed in the tensioner, the positioning piece is operated to be selectively positioned in one of the adjusting holes, the different positions of the tensioner relative to the body can be adjusted, and therefore the purpose of selecting the positions of various different supporting flexible transmission elements is achieved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a tension adjustment device, in particular to a tension adjustment device for a flexible transmission mechanism, so as to facilitate the flexible transmission element to be restored to a good tension state when the flexible transmission element is slack. BACKGROUND

[0002] Traditional flexible mechanical elements, such as belts, ropes, chains, etc., are used for power transmission over long distances. When using these transmission elements, the most common problem faced is that the flexible mechanical elements will become slack after a period of use, resulting in poor transmission efficiency. This is because the flexible mechanical elements use tensile force transmission, and the long-term pulling causes the flexible mechanical elements to become slack, resulting in insufficient tension. The early solution was to directly replace the new flexible mechanical elements such as belts, ropes, chains, etc. However, this is a high cost solution, as the belts, ropes, chains have not been truly damaged and are not at the end of their useful life.

[0003] Later known improvements are to use common idler pulleys and install them on the slack side of the flexible mechanical elements to improve the slack problem caused by insufficient tension after long-term use of the flexible mechanical elements. However, the use of idler pulleys still has its drawbacks, as the idler pulleys exert a pre-tension on the flexible mechanical elements, and the flexible mechanical elements used in this case will still become slack after a period of time, and still need to be improved. CONTENT OF THE INVENTION

[0004] To solve the above technical problems, the present disclosure provides a tension adjustment device that uses a simple structure, low cost, and convenient operation to restore the flexible transmission element to a good tension state. Not only does it extend the service life of the flexible transmission element, but it also provides a variety of different adjustment positions for selection.

[0005] In one embodiment of the present disclosure, a tension adjustment device is provided, which includes a body having a first end and a second end, the first end being capable of being fixed to a flexible transmission mechanism, the second end having a first axis and a support member extending along the first axis; a tensioner provided on the support member of the body and capable of supporting a flexible transmission element of the flexible transmission mechanism, the tensioner including a base having a second axis, the base being provided with a support hole parallel to the second axis and located at an eccentric position of the base, the support hole being sleeved on the support member, a rolling ring in the shape of a hollow circular ring and sleeved on the base, the rolling ring being capable of generating relative rotational movement with the base as the center of the second axis, and an adjustment seat having a pivot hole, the pivot hole being sleeved on the support member and capable of swinging with the body as the center of the first axis to adjust different positions of the rolling ring pressing against the flexible transmission element; and a positioner including a positioning member provided on the body and a plurality of adjustment holes provided on the tensioner, the positioning member being capable of being positioned in one of the plurality of adjustment holes by operation to adjust different positions of the tensioner relative to the body, thereby achieving selection of a plurality of positions supporting the flexible transmission element.

[0006] Therefore, the present disclosure has the advantages of simple structure and convenient operation by providing an eccentric position of the tensioner on the body, so that the positioner can adjust the tensioner to a plurality of positions such as a low position, a middle position, a high position, etc. when operated, and is very suitable for improving the flexible transmission mechanism.

[0007] In one embodiment of the present disclosure, the body has a third axis parallel and spaced apart from the first axis, and the body is provided with a positioning hole extending along the third axis, and the positioning member is provided in the positioning hole and capable of being positioned in one of the plurality of adjustment holes.

[0008] In one embodiment of the present disclosure, the plurality of adjustment holes are provided on one side of the adjustment seat close to the positioning member, and the plurality of adjustment holes are regularly or irregularly distributed on the adjustment seat at the same radius distance from the center of the pivot hole.

[0009] In one embodiment of the present disclosure, the plurality of adjustment holes are three, so that the positioner can select to position the tensioner at three positions of a low position, a middle position and a high position.

[0010] In one embodiment of the present disclosure, the support member includes a connecting portion and a limiting portion opposite to each other, the connecting portion of the support member being capable of being detachably provided in a connecting hole of the second end of the body, and the limiting portion of the support member being stopped on the side of the base away from the body.

[0011] In one embodiment of the present disclosure, the base has a circumferential portion surrounding the outside of the base with the second axis as the center.

[0012] In one of the embodiments of the present disclosure, the circumferential portion of the base further comprises a radially outward annular shoulder, one side of the rolling ring is limited by the annular shoulder of the base and cannot be separated from the base.

[0013] In one of the embodiments of the present disclosure, the rolling ring has an inner circumference and is rotatably sleeved on the circumferential portion of the base, the outer circumference of the rolling ring can be used to support the flexible transmission element, and the adjusting seat has an adjusting portion capable of selectively contacting the inner circumference.

[0014] In one of the embodiments of the present disclosure, the body is in the form of a plate, the first end can be fixed to the flexible transmission mechanism by a screw rod, and the adjusting seat is located between the base and the body so that the rolling ring does not directly contact the body.

[0015] In one of the embodiments of the present disclosure, the tensioner further comprises a bearing arranged in the rolling ring, the bearing is rotatably sleeved on the base and the adjusting seat. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a perspective view of a tension adjusting device of the present disclosure.

[0017] Figure 2 is an exploded view of a tension adjusting device of the present disclosure.

[0018] Figure 3 is a use state diagram of a tension adjusting device of the present disclosure, showing that the tension adjusting device is supported on a flexible transmission element, and indicating that the tensioner is in a middle position.

[0019] Figure 4 is another use state diagram of a tension adjusting device of the present disclosure, showing that the tension adjusting device is supported on a flexible transmission element, and indicating that the tensioner is in a high position.

[0020] Figure 5 is a sectional view taken along the sectional line 5-5 of Figure 3 . DETAILED DESCRIPTION

[0021] Referring to Figures 1 to 5 , the present disclosure provides a tension adjusting device 100. The tension adjusting device 100 comprises a body 10, a tensioner 20 arranged on the body 10, and a positioner 30 arranged between the body 10 and the tensioner 20, and the tension adjusting device 100 can be installed on a flexible transmission mechanism.

[0022] The body 10 is plate-shaped, comprising a first end 101 and a second end 102. The first end 101 can be fixed at a suitable position of the flexible transmission mechanism, such as a machine table, by a screw rod 90. The second end 102 has a first axis X1 and a support 11 extending along the first axis X1. The support 11 comprises a connecting portion 111 and a limiting portion 112 opposite to each other. The connecting portion 111 of the support 11 can be detachably arranged in a connecting hole 103 of the second end 102 of the body 10.

[0023] The tensioner 20 is arranged on the support 11 of the body 10, and can be used to support a flexible transmission element 91, such as a belt, a rope, a chain or the like, of the flexible transmission mechanism. The tensioner 20 comprises a base 21, a rolling ring 22 and an adjusting seat 23.

[0024] The base 21 has a second axis X2 and a circumferential portion 211 surrounding the base 21 with the second axis X2 as the center. The circumferential portion 211 of the base 21 further comprises a radially outward annular shoulder 212. The base 21 is provided with a support hole 213 parallel to the second axis X2, and the support hole 213 is arranged at an eccentric position of the base 21. The support hole 213 is sleeved on the support 11, and the limiting portion 112 of the support 11 is stopped at a side of the base 21 away from the body 10.

[0025] The rolling ring 22 is circular and hollow, and is sleeved on the base 21, so that the rolling ring 22 can have a relative rotational movement relationship with the second axis X2 of the base 21 as the center. The rolling ring 22 has an inner periphery 221, and is rotatably sleeved on the circumferential portion 211 of the base 21. One side of the rolling ring 22 is limited by the annular shoulder 212 of the base 21 and cannot be separated from the base 21. An outer periphery 222 of the rolling ring 22 can be used to support the flexible transmission element 91, such as a belt, a rope, a chain or the like.

[0026] The adjusting seat 23 has a pivot hole 231 sleeved on the support 11, and the adjusting seat 23 can swing around the first axis X1 of the body 10 as the center to adjust different positions of the rolling ring 22 pressing against the flexible transmission element 91. The adjusting seat 23 has an adjusting portion 232 selectively contacting the inner periphery 221 of the rolling ring 22. The adjusting seat 23 is located between the base 21 and the body 10, so that the rolling ring 22 does not directly contact the body 10, and thus the rolling ring 22 can maintain good rotation function.

[0027] In the embodiment of the present disclosure, the tensioner 20 further comprises a bearing 24 arranged in the rolling ring 22, and the bearing 24 is rotatably sleeved on the base 21 and the adjusting seat 23, which increases the rolling effect of the rolling ring 22 of the tensioner 20, effectively reduces the wear between the rolling ring 22 and the base 21, and further improves the service life.

[0028] The positioner 30 comprises a positioning member 31 arranged on the body 10 and a plurality of adjustment holes 32 arranged on the tensioner 20. By operating the positioning member 31, the tensioner 20 can be positioned in one of the plurality of adjustment holes 32, so as to adjust the position of the tensioner 20 relative to the body 10, thereby selecting the position of the flexible transmission element 91. The body 10 has a third axis X3 parallel and spaced apart from the first axis X1. The body 10 is provided with a positioning hole 104 extending along the third axis X3. The positioning member 31 is arranged in the positioning hole 104 and can be positioned in one of the plurality of adjustment holes 32. The plurality of adjustment holes 32 are arranged on the side of the adjustment seat 23 close to the positioning member 31. The plurality of adjustment holes 32 are regularly or irregularly distributed around the pivot hole 231 at a same radius distance from the center of the pivot hole 231.

[0029] In the embodiment of the present disclosure, the plurality of adjustment holes 32 are three, so that the positioner 30 can select to position the tensioner 20 at three positions, i.e., a low position, a middle position and a high position.

[0030] As shown in Figure 2 , Figure 3 and Figure 5 , the use state diagram of the present disclosure is shown in Figure 3 The dashed line shows the normal use state of the flexible transmission element 91. At this time, the tensioner 20 is kept at the middle position. However, after long-term use, the flexible transmission element 91 will sag due to relaxation. At this time, the tension of the flexible transmission element 91 is insufficient, and the transmission efficiency is prone to be poor. Therefore, the position of the tensioner 20 can be adjusted by operating the positioner 30.

[0031] The user can operate the positioning member 31 to disengage the positioning member 31 from the adjustment hole 32 of the adjustment seat 23. At this time, the tensioner 20 can swing relative to the body 10 with the first axis X1 as the center. After the tensioner 20 is swung to the high position, the positioning member 31 is positioned in the adjustment hole 32 of the high position. In this way, the flexible transmission element 91 will be supported by the roller ring 22 of the tensioner 20. As shown in Figure 4 , good tension is applied to the flexible transmission element 91, and the flexible transmission mechanism is finally restored to good transmission efficiency, and the overall service life is prolonged.

[0032] The tension adjustment device 100 of the present disclosure has the advantages of simple structure, low cost and convenient operation. After the tensioner 20 is positioned by the positioner 30, the tension of the flexible transmission element 91 can be stabilized. In addition, the plurality of adjustment holes 32 of the positioner 30 can be arranged in different numbers according to the requirements of the machine, thereby providing adjustment and selection of different positions, which is quite convenient and versatile in use.

[0033] BRIEF DESCRIPTION OF REFERENCE NUMERALS

[0034] 100: tension adjusting device;

[0035] 10: body;

[0036] 101: first end;

[0037] 102: second end;

[0038] 103: combination hole;

[0039] 104: positioning hole;

[0040] 11: support;

[0041] 111: combination part;

[0042] 112: limiting part;

[0043] 20: tensioner;

[0044] 21: base;

[0045] 211: circumferential part;

[0046] 212: shoulder;

[0047] 213: support hole;

[0048] 22: rolling ring;

[0049] 221: inner periphery;

[0050] 222: outer periphery;

[0051] 23: adjusting seat;

[0052] 231: pivot hole;

[0053] 232: adjusting part;

[0054] 24: bearing;

[0055] 30: positioner;

[0056] 31: positioning member;

[0057] 32: adjusting hole;

[0058] 90: screw rod;

[0059] 91: flexible transmission element;

[0060] X1: first axis;

[0061] X2: second axis;

[0062] X3: third axis.

Claims

1. A tension adjustment device, characterized in that, include: The body includes a first end and a second end, the first end being able to be fixed to a flexible transmission mechanism, and the second end having a first axis and a support extending along the first axis; A tensioner, disposed on the support member, is used to support the flexible transmission element of the flexible transmission mechanism. The tensioner includes a base, a rolling ring, and an adjusting seat. The base has a second axis and a support hole parallel to the second axis, with the support hole located at an eccentric position on the base. The support hole is fitted onto the support member. The rolling ring is a circular hollow ring fitted onto the base, allowing it to rotate relative to the second axis. The adjusting seat has a pivot hole fitted onto the support member, allowing it to swing about the first axis to adjust the position of the rolling ring pressing against the flexible transmission element. The positioner includes a positioning element disposed on the body and a plurality of adjustment holes disposed on the tensioner. By operating the positioning element to select and position it in one of the plurality of adjustment holes, the position of the tensioner relative to the body can be adjusted to different positions, thereby achieving the selection of a variety of different positions for supporting flexible transmission elements.

2. The tension adjustment device according to claim 1, characterized in that, The body has a third axis that is parallel to and spaced apart from the first axis. The body is provided with a positioning hole extending along the third axis. The positioning element is disposed in the positioning hole and can be selectively positioned in one of the plurality of adjustment holes.

3. The tension adjustment device according to claim 2, characterized in that, The plurality of adjustment holes are located on the side of the adjustment seat near the positioning member, and the plurality of adjustment holes are distributed regularly or irregularly on the adjustment seat with the same radius distance from the center of the pivot hole.

4. The tension adjustment device according to claim 3, characterized in that, The plurality of adjustment holes have three, which allows the positioner to select three positions for the tensioner: low, medium, and high.

5. The tension adjustment device according to claim 2, characterized in that, The support member includes a connecting portion and a limiting portion that are opposite to each other. The connecting portion of the support member can be detachably provided in the connecting hole at the second end of the body, and the limiting portion of the support member stops the base on the side away from the body.

6. The tension adjustment device according to claim 5, characterized in that, The base has a circumferential portion that surrounds the base with the second axis as its center.

7. The tension adjustment device according to claim 6, characterized in that, The circumferential portion of the base also includes a radially outward annular shoulder, one side of the rolling ring being constrained by the annular shoulder of the base and thus not detached from the base.

8. The tension adjustment device according to claim 7, characterized in that, The rolling ring has an inner circumference and is rotatably fitted onto the circumference of the base. The outer circumference of the rolling ring can be used to support a flexible transmission element. The adjusting seat has an adjusting part that can selectively contact the inner circumference.

9. The tension adjustment device according to claim 8, characterized in that, The body is plate-shaped, and the first end can be fixed to the flexible transmission mechanism by a screw. The adjusting seat is located between the base and the body, so that the rolling ring does not directly contact the body.

10. The tension adjustment device according to claim 9, characterized in that, The tensioner also includes a bearing disposed within the rolling ring, the bearing being rotatably fitted onto the base and the adjusting seat.

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