Belt tension adjustment mechanism

Abstract

The utility model relates to a belt tensioning force adjustment mechanism, including a box body, wherein two pulleys are arranged in the box body, and the outer peripheral surfaces of the two pulleys are jointly sleeved with a belt, and the inner wall of the box body is fixedly connected with a fixed shaft, and the outer peripheral surface of the fixed shaft is rotatably connected with a lever, and grooves are provided at both ends of the lever, and rotating shafts are rotatably penetrated at the side walls of the lever near both ends, and the rotating shaft rotates through the corresponding grooves, and a tensioning wheel is rotatably connected to the outer peripheral surface of one of the rotating shafts, and the tensioning wheel is partially located in the corresponding groove, and the outer peripheral surface of the tensioning wheel contacts the belt, and an adjustment part is provided at the end of the lever away from the belt. The utility model relates to the technical field of belt adjustment. The utility model has a simple and exquisite structure, is easy to adjust, and is convenient for manual operation. It is suitable for adjusting the tension of a belt drive belt under general circumstances, and is particularly suitable for adjusting the tension of a belt drive belt in a sealed box body.

Description

Technical Field

[0001] The utility model relates to the technical field of belt adjustment, in particular to a belt tensioning force adjustment mechanism. Background Art

[0002] Belt drive is composed of one or more belts tightly sleeved on two pulleys, which are respectively mounted on the driving shaft and the driven shaft. The friction between the belt and the two pulleys is used to transmit motion and power. After working for a period of time, the transmission belt of the belt drive will produce permanent deformation and make the belt loose, affecting the working capacity of the belt drive. Therefore, tensioning measures are needed to ensure a certain initial tension.

[0003] There are generally two ways to adjust the belt tension: changing the center distance of the pulley shaft and using a tensioner. Usually the two pulleys are fixed, and changing the center distance of the pulley shaft is not possible. The tensioner is a follower wheel pressed on the belt to change the wrap angle of the pulley or control the tension of the belt. The tensioner is usually located between the two pulleys, on the outside or inside of the belt, and once the tension is adjusted, it is also fixed.

[0004] However, it is currently inconvenient to adjust the belt tension of the belt drive, and the belt drive is often set in a sealed housing. Whether changing the center distance of the pulley shaft or using a tensioner, it is necessary to manually disassemble the housing shell and then manually tighten or loosen the belt, which is complicated to operate and has low maintenance efficiency. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the present utility model is to provide a belt tension adjustment mechanism so as to solve the technical problems mentioned in the above background technology.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A belt tension adjustment mechanism comprises a box body, wherein two pulleys are arranged in the box body, and a belt is commonly sleeved on the outer circumferences of the two pulleys, a fixed shaft is fixedly connected to the inner wall of the box body, and a lever is rotatably connected to the outer circumference of the fixed shaft, grooves are provided at both ends of the lever, and rotating shafts are rotatably penetrated at the side walls of the lever near both ends, and the rotating shaft rotatably passes through the corresponding grooves, and a tensioning wheel is rotatably connected to the outer circumference of one of the rotating shafts, the tensioning wheel portion is located in the corresponding groove, and the outer circumference of the tensioning wheel is in contact with the belt, and an adjustment portion is provided at the end of the lever away from the belt.

[0008] Furthermore, the adjusting part includes a push rod rotatably connected to the outer peripheral surface of another rotating shaft, the push rod portion is located in the groove away from the belt, and one end of the push rod located outside the groove is rotatably connected to a screw rod, the screw rod passes through the inner wall of the box body and partially extends to the outside of the box body, and the screw rod is threadedly connected to the box body.

[0009] Furthermore, corresponding to the outer circumference of the shaft, the tensioning wheel end shaft spacers are rotatably connected at the upper and lower sides of the tensioning wheel, and the opposite sides of the tensioning wheel end shaft spacers are respectively in contact with the inner wall of the groove and the side wall of the tensioning wheel.

[0010] Furthermore, push rod end shaft spacers are rotatably connected to the upper and lower sides of the push rod corresponding to the outer circumferential surface of the shaft, and the opposite sides of the push rod end shaft spacers are respectively in contact with the inner wall of the groove and the side wall of the push rod.

[0011] Furthermore, shaft spring retaining rings are installed on the side walls of the lever corresponding to the fixed shaft and the rotating shaft.

[0012] In summary, the present invention includes at least one of the following beneficial technical effects:

[0013] 1. This belt tension adjustment mechanism can drive the lever to rotate by rotating the screw rod, thereby adjusting the position of the tension pulley, changing the distance between the tension pulley and the centerline of the two pulley circles, and adjusting the tension of the belt. It has a simple and exquisite structure, is easy to adjust, and is convenient for manual operation. It is suitable for adjusting the tension of the belt drive belt under general circumstances, and is particularly suitable for adjusting the tension of the belt drive belt in the sealed box.

[0014] 2. The belt tensioning force adjustment mechanism isolates the tensioning wheel, the push rod and the lever through the provision of the tensioning wheel end shaft spacer and the push rod end shaft spacer, thereby preventing the tensioning wheel, the push rod and the lever from direct contact and friction, thereby increasing the service life of the device;

[0015] 3. The belt tensioning force adjustment mechanism, through the provision of a shaft spring retaining ring, limits the axial movement or even falling off of the rotating shaft and the fixed shaft relative to the lever, thereby further improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1is a schematic diagram of the overall structure of a belt tension adjustment mechanism of this embodiment;

[0018] Figure 2 This embodiment Figure 1 Cross-sectional view at AA in the middle.

[0019] In the figure, 1. box body; 2. pulley; 3. belt; 4. tensioner; 5. rotating shaft; 6. fixed shaft; 7. lever; 8. spring retaining ring for shaft; 9. push rod; 10. rotating shaft spacer at the tensioner end; 11. rotating shaft spacer at the push rod end; 12. groove; 13. screw; 14. adjustment part. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] Example:

[0022] Reference Figure 1 to Figure 2 The utility model discloses a belt tensioning force adjustment mechanism, including a box body 1, two pulleys 2 are arranged in the box body 1, and the outer circumferences of the two pulleys 2 are jointly sleeved with a belt 3, the inner wall of the box body 1 is fixedly connected with a fixed shaft 6, the outer circumference of the fixed shaft 6 is rotatably connected with a lever 7, both ends of the lever 7 are provided with grooves 12, and the side walls of the lever 7 near the two ends are rotatably penetrated with a rotating shaft 5, and the rotating shaft 5 rotates through the corresponding grooves 12.

[0023] The outer circumference of one of the rotating shafts 5 is rotatably connected to a tension wheel 4 , a portion of the tension wheel 4 is located in the corresponding groove 12 , and the outer circumference of the tension wheel 4 is in contact with the belt 3 , and an adjusting portion 14 is provided at one end of the lever 7 away from the belt 3 .

[0024] In this embodiment, two transmission rods are rotatably provided on one side of the box body 1, and part of the transmission rods are located outside the box body 1 and part of them are located inside the box body 1. The pulley 2 is fixedly sleeved on the outer circumference of the corresponding transmission rod, and when one of the transmission rods rotates, the other transmission rod can be driven to rotate through the belt 3. The two pulleys 2 and the belt 3 are located inside the box body 1.

[0025] The tensioner 4 contacts the belt 3 and applies pressure to the belt 3, thereby improving the tension of the belt 3. When the tension of the belt 3 needs to be adjusted, the lever 7 is rotated by the adjusting portion 14, thereby driving the tensioner 4 to move, changing the degree to which the tensioner 4 squeezes the belt 3, that is, changing the distance between the tensioner 4 and the centerline of the two pulleys 2, so as to adjust the tension of the belt 3.

[0026] In a further preferred embodiment of the present invention, Figure 2As shown, the adjusting portion 14 includes a push rod 9 rotatably connected to the outer circumference of another rotating shaft 5, a portion of the push rod 9 is located in a groove 12 away from the belt 3, and one end of the push rod 9 located outside the groove 12 is rotatably connected to a screw 13, the screw 13 passes through the inner wall of the box body 1 and partially extends to the outside of the box body 1, and the screw 13 is threadedly connected to the box body 1.

[0027] In this embodiment, when it is necessary to adjust the tension of the belt 3, the screw 13 is rotated, the screw 13 drives the push rod 9 to move axially, and the push rod 9 pushes the lever 7 to rotate, thereby driving the tensioning wheel 4 to move, and finally changing the distance between the tensioning wheel 4 and the center line of the two pulleys 2, thereby achieving the purpose of adjusting the tension of the belt 3.

[0028] In a further preferred embodiment of the present invention, Figure 2 As shown, the outer circumference of the corresponding shaft 5 is rotatably connected to the tensioner end shaft spacer 10 at the upper and lower sides of the tensioner 4, and the opposite sides of the tensioner end shaft spacer 10 are respectively in contact with the inner wall of the groove 12 and the side wall of the tensioner 4.

[0029] In this embodiment, the tensioner end shaft spacer 10 prevents the tensioner 4 from directly contacting and rubbing against the lever 7, thereby increasing the service life of the device.

[0030] In a further preferred embodiment of the present invention, Figure 2 As shown, the corresponding outer circumference of the shaft 5 is rotatably connected to the push rod 9 at the upper and lower sides thereof, and the push rod end shaft spacer 11 is respectively fitted with the inner wall of the groove 12 and the side wall of the push rod 9 at opposite sides.

[0031] In this embodiment, the push rod end shaft spacer 11 prevents the push rod 9 from directly contacting and rubbing against the lever 7, thereby increasing the service life of the device.

[0032] In a further preferred embodiment of the present invention, Figure 2 As shown, shaft spring retaining rings 8 are installed on the side walls of the lever 7 corresponding to the fixed shaft 6 and the rotating shaft 5.

[0033] In this embodiment, the provision of the shaft spring retaining ring 8 limits the axial movement of the rotating shaft 5 and the fixed shaft 6 relative to the lever 7 or even their falling off, further increasing the service life of the device.

[0034] The implementation principle of the above embodiment is:

[0035] When the tension of the belt 3 needs to be adjusted, the screw 13 is rotated, and the screw 13 drives the push rod 9 to move axially. The push rod 9 pushes the lever 7 to rotate, thereby driving the tensioner 4 to move, changing the degree to which the tensioner 4 squeezes the belt 3, that is, changing the distance between the tensioner 4 and the center line of the two pulleys 2, so as to adjust the tension of the belt 3.

[0036] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A belt tension adjustment mechanism, comprising a housing (1), wherein two pulleys (2) are arranged in the housing (1), and a belt (3) is commonly sleeved on the outer circumference of the two pulleys (2), characterized in that: The inner wall of the box body (1) is fixedly connected with a fixed shaft (6), and the outer peripheral surface of the fixed shaft (6) is rotatably connected with a lever (7), both ends of the lever (7) are provided with grooves (12), and the side walls of the lever (7) are rotatably penetrated with a rotating shaft (5) near both ends, and the rotating shaft (5) rotates through the corresponding groove (12), and the outer peripheral surface of one of the rotating shafts (5) is rotatably connected with a tensioning wheel (4), and the tensioning wheel (4) is partially located in the corresponding groove (12), and the outer peripheral surface of the tensioning wheel (4) is in contact with the belt (3), and the end of the lever (7) away from the belt (3) is provided with an adjusting portion (14).

2. A belt tension adjustment mechanism according to claim 1, characterized in that: The adjusting portion (14) comprises a push rod (9) rotatably connected to the outer peripheral surface of another rotating shaft (5), wherein a portion of the push rod (9) is located in the groove (12) away from the belt (3), and one end of the push rod (9) located outside the groove (12) is rotatably connected to a screw rod (13), wherein the screw rod (13) passes through the inner wall of the box body (1) and partially extends to the outside of the box body (1), and the screw rod (13) is threadedly connected to the box body (1).

3. A belt tension adjustment mechanism according to claim 2, characterized in that: Corresponding to the outer circumference of the rotating shaft (5), the tension wheel end rotating shaft spacer (10) is rotatably connected at the upper and lower sides of the tension wheel (4), and the opposite sides of the tension wheel end rotating shaft spacer (10) are respectively in contact with the inner wall of the groove (12) and the side wall of the tension wheel (4).

4. A belt tension adjustment mechanism according to claim 3, characterized in that: A push rod end shaft spacer (11) is rotatably connected to the outer circumferential surface of the shaft (5) at both upper and lower sides of the push rod (9), and the push rod end shaft spacer (11) is respectively fitted with the inner wall of the groove (12) and the side wall of the push rod (9) on opposite sides.

5. A belt tension adjustment mechanism according to claim 4, characterized in that: Axle spring retaining rings (8) are installed on the side walls of the lever (7) corresponding to the fixed shaft (6) and the rotating shaft (5).

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