Belt tensioner and polishing machine

Abstract

The utility model discloses a kind of belt tensioner and polishing machine, including support seat, rotating assembly and tensioning piece, rotating assembly includes rotating arm, force arm and adjusting part, rotating arm has rotating end and movable end, the rotating end of rotating arm is connectable rotating connection support seat, the rotating end of force arm is connected rotating arm, adjusting part connects support seat and force arm, for adjusting the fixed angle of rotating arm;Tensioning piece rotating connection rotating arm movable end.The utility model can effectively avoid that adjusting part in belt tensioner intrudes into belt mechanism.

Description

Technical Field

[0001] This utility model relates to the field of belt tensioning technology for polishing machines, specifically to belt tensioning devices and polishing machines. Background Technology

[0002] To polish rice, a rice polishing machine uses a motor and belt mechanism to drive a polishing roller, which then polishes the rice. Over time, the belt in the belt mechanism may loosen; to prevent this, the belt needs to be tensioned.

[0003] CN213981869U discloses a belt tensioning mechanism for a rice transplanter or direct seeding machine, including an engine base, a drive wheel and a driven wheel on the engine base, a belt wound between the drive wheel and the driven wheel, a tensioning arm assembly and a support seat on the side of the engine base, one end of the tensioning arm assembly being rotatably connected to the engine base, and the other end having a tensioning wheel that contacts the belt, the support seat being fixed to the engine base, the support seat being a sleeve structure, a spring support rod passing through the support seat, the spring support rod being a threaded rod, one end of the spring support rod being hinged to the tensioning arm assembly near the tensioning wheel, a tension spring being provided between the support seat and the tensioning arm assembly, the tension spring being sleeved on the spring support rod, and a locking nut being provided at the other end of the spring support rod.

[0004] In the belt tensioning mechanism described above, the tension applied to the belt is adjusted by rotating the threaded rod in the spring support rod. However, since one end of the spring support rod is hinged to the tension arm assembly near the tension wheel, although the spring support rod can retract by rotation, even after retraction, the spring support rod still encroaches too much on the space between the two pulleys, which will affect the maintenance of other equipment. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a belt tensioning device and polishing machine to solve the technical problem in the prior art where the connection position of the tensioning mechanism and the tensioning arm is close to the tensioning wheel, causing the tensioning mechanism to excessively intrude into the space between the two pulleys.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, this utility model provides a belt tensioning device, comprising:

[0008] Support base;

[0009] A rotating assembly includes a rotating arm, a lever arm, and an adjusting component. The rotating arm has a rotating end and a movable end. The rotating end of the rotating arm is rotatably connected to the support base. The lever arm is connected to the rotating end of the rotating arm. The adjusting component connects the support base and the lever arm, and is used to adjust the fixed angle of the rotating arm.

[0010] The tensioning element is rotatably connected to the movable end of the rotating arm.

[0011] In one embodiment, the adjusting member is threadedly connected to the support seat and slidably connected to the lever arm.

[0012] In one embodiment, the lever arm is provided with a groove;

[0013] The adjusting component includes a sliding rod, a sliding seat, and a screw. The sliding rod is slidably disposed in the sliding groove, the sliding seat is connected to the sliding rod, and the screw is threadedly connected to the support seat and rotatably connected to the sliding seat.

[0014] In one embodiment, the circumferential surface of one end of the screw is prismatic.

[0015] In one embodiment, the extension direction of the groove intersects perpendicularly with the rotation axis of the rotating arm.

[0016] In one embodiment, the tensioning member includes a fixed shaft and a tensioning wheel, the fixed shaft being connected to the movable end of the rotating arm, and the tensioning wheel being rotatably sleeved on the fixed shaft.

[0017] In one embodiment, the tensioning member further includes a bearing sleeved on the fixed shaft and disposed between the fixed shaft and the tensioning wheel.

[0018] In one embodiment, the rotating arm has a weight-reducing groove along its length.

[0019] Secondly, this utility model also provides a polishing machine, including the aforementioned belt tensioning device.

[0020] In one embodiment, the polishing machine further includes:

[0021] frame;

[0022] The first pulley assembly includes a first pulley and a second pulley rotatably connected to the frame, and a first belt respectively sleeved on the first pulley and the second pulley; and

[0023] The second pulley assembly includes a third pulley and a fourth pulley rotatably connected to the frame, and a second belt respectively sleeved on the third pulley and the fourth pulley. The third pulley is coaxially arranged with the first pulley and is located on the side of the first pulley away from the frame.

[0024] The support base is connected to the frame, the tensioning member is disposed between the third pulley and the fourth pulley, and the tensioning member is disposed outside the second belt and can rotate to abut against the second belt.

[0025] Compared with the prior art, the belt tensioning device and polishing machine provided by this utility model, when it is necessary to tension the belt, make the tensioning member abut against the belt to be tensioned, and then control the action of the adjusting member to adjust the fixed angle of the rotating arm through the adjusting member, so as to adjust the tension force applied to the belt by the tensioning member.

[0026] The connection between the adjusting component that adjusts the fixed angle of the rotating arm and the rotating arm is located at the rotating end of the rotating arm, away from the tensioning component on the rotating arm. During the adjustment process, the adjusting component will not follow the tensioning component into the space between the two pulleys. By setting a lever arm, when the adjusting component pushes the rotating arm to rotate via the lever arm, the torque applied to the rotating arm can be increased, making it easier for the adjusting component to push the rotating arm to rotate. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a polishing machine provided in one embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of a polishing machine provided in one embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a belt tensioning device provided in an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of a belt tensioning device provided in an embodiment of the present invention;

[0031] Figure 5 This is a cross-sectional view of the adjusting component in a belt tensioning device provided in an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] Support 1;

[0034] Rotating assembly 2; rotating arm 21; weight reduction groove 21a; lever arm 22; slide groove 22a; adjusting component 23; sliding rod 231; sliding seat 232; screw 233; annular groove 233a; limit screw 234;

[0035] Tensioning component 3; Fixed shaft 31; Tensioning wheel 32; Bearing 33;

[0036] Rack 4;

[0037] First pulley assembly 5; First pulley 51; Second pulley 52; First belt 53;

[0038] Second pulley assembly 6; Third pulley 61; Fourth pulley 62; Second belt 63; Detailed Implementation

[0039] 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 embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0040] To address the technical problem that the tensioning mechanism's connection to the tensioning arm is too close to the tensioning wheel, causing the tensioning mechanism to excessively encroach on the space between the two pulleys, this invention provides a belt tensioning device and a polishing machine that can prevent the tensioning device from excessively encroaching on the space between the two pulleys.

[0041] It should be noted that the belt tensioning device described in this utility model is used in, but not limited to, rice polishing machines. For ease of explanation, this utility model only uses the application of the belt tensioning device in a rice polishing machine as an example. The principle of the belt tensioning device in other types of equipment is essentially the same as that in the rice polishing machine, and will not be described in detail here.

[0042] Please see Figure 3 , Figure 3 This is a schematic diagram of the belt tensioning device in one embodiment of the present invention. The belt tensioning device includes a support base 1, a rotating assembly 2, and a tensioning member 3. The rotating assembly 2 includes a rotating arm 21, a lever arm 22, and an adjusting member 23. The rotating arm 21 has a rotating end and a movable end. The rotating end of the rotating arm 21 is rotatably connected to the support base 1. The lever arm 22 is connected to the rotating end of the rotating arm 21. The adjusting member 23 is connected to the support base 1 and the lever arm 22 and is used to adjust the fixed angle of the rotating arm 21. The tensioning member 3 is rotatably connected to the movable end of the rotating arm 21.

[0043] Specifically, when the belt needs to be tensioned, the tensioning member 3 abuts against the belt to be tensioned, and then the adjusting member 23 is controlled to adjust the fixed angle of the rotating arm 21, so as to adjust the tension force applied to the belt by the tensioning member 3.

[0044] The connection between the adjusting member 23, which adjusts the fixed angle of the rotating arm 21, and the rotating arm 21 is located at the rotating end of the rotating arm 21, away from the tensioning member 3 on the rotating arm 21. During the adjustment process, the adjusting member 23 will not follow the tensioning member 3 into the space between the two pulleys. By setting the lever arm 22, when the adjusting member 23 pushes the rotating arm 21 to rotate via the lever arm 22, the torque applied to the rotating arm 21 can be increased, making it easier for the adjusting member 23 to push the rotating arm 21 to rotate.

[0045] It should be understood that the support base 1 can be various types of supports, bases and fixed seats, etc.; the adjusting component 23 can be an electric telescopic rod, with both ends of the electric telescopic rod connected to the support base 1 and the lever arm 22, respectively.

[0046] like Figure 3 and 4 As shown, in one embodiment, the adjusting member 23 is threadedly connected to the support 1 and slidably connected to the lever arm 22.

[0047] In this embodiment, when it is necessary to adjust the fixed angle of the rotating arm 21, the adjusting member 23 is rotated, the adjusting member 23 moves relative to the support base 1, and slides relative to the lever arm 22 while pushing the rotating arm 21 to rotate, so as to avoid motion interference.

[0048] It should be understood that the adjusting component 23 and the lever arm 22 can be slidably connected via slide rails and sliders, for example, Figure 4 As shown, in one embodiment, the lever arm 22 has a groove 22a; the adjusting member 23 includes a sliding rod 231, a sliding seat 232 and a screw 233. The sliding rod 231 is slidably disposed in the groove 22a, the sliding seat 232 is connected to the sliding rod 231, and the screw 233 is threadedly connected to the support seat 1 and rotatably connected to the sliding seat 232.

[0049] In this embodiment, when it is necessary to adjust the fixed angle of the rotating arm 21, the screw 233 is rotated, the screw 233 moves relative to the support seat 1, and pushes the force arm 22 and the rotating arm 21 to rotate via the sliding seat 232 and the screw 233. During the process of pushing the rotating arm 21 and the force arm 22 to rotate, the sliding rod 231 slides relative to the slide groove 22a.

[0050] To achieve a rotatable connection between the screw 233 and the sliding seat 232, for this purpose, as follows: Figure 5As shown, in one embodiment, the sliding seat 232 has a rotating hole, and the outer wall of the sliding seat 232 has a threaded hole that communicates with the rotating hole. One end of the screw 233 is threadedly connected to the support seat 1, and the other end is rotatably inserted into the rotating hole. The other end of the screw 233 has an annular groove 233a relative to the threaded hole. The adjusting member 23 also includes a limiting screw 234, which is threadedly connected to the threaded hole and is slidably disposed in the annular groove 233a along the radial direction of the screw 233.

[0051] When the screw 233 is rotated, the screw 233 moves relative to the support seat 1 and rotates relative to the limiting screw 234. The limiting screw 234 pushes the sliding seat 232 to move, and the sliding seat 232 pushes the rotating arm 21 to rotate via the sliding rod 231 and the lever arm 22. In this embodiment, by setting the limiting screw 234, the axial position of the screw 233 can be limited, and the rotational connection between the screw 233 and the sliding seat 232 is realized through the cooperation between the limiting screw 234 and the annular groove 233a.

[0052] To facilitate the rotation of screw 233, an internal hexagonal hole can be provided at one end of screw 233, specifically, as shown in... Figure 3 and 4 As shown, in one embodiment, the circumferential surface of one end of the screw 233 is prismatic.

[0053] By setting the circumferential surface of one end of the screw 233 to a prism shape, the prism-shaped circumferential surface of the screw 233 can be clamped by tools such as wrenches, and the screw 233 can be rotated in this way.

[0054] It should be understood that the circumferential surface of one end of the screw 233 can be a quadrangular prism, a hexagonal prism, or an octagonal prism, etc.

[0055] like Figure 4 As shown, in one embodiment, the extending direction of the groove 22a intersects perpendicularly with the rotation axis of the rotating arm 21.

[0056] The design of the slide groove 22a being perpendicular to the rotation axis makes the sliding direction of the sliding rod 231 perpendicular to the rotation axis of the rotating arm 21. This orthogonal relationship can efficiently convert the linear motion of the adjusting member 23 into the rotational torque of the rotating arm 21, reduce lateral force loss, and improve the transmission efficiency of the adjusting force.

[0057] It should be understood that tensioning component 3 can be a tensioning wheel, pulley, tensioning roller, etc., specifically, such as Figure 4 As shown, in one embodiment, the tensioning member 3 includes a fixed shaft 31 and a tensioning wheel 32. The fixed shaft 31 is connected to the movable end of the rotating arm 21, and the tensioning wheel 32 is rotatably sleeved on the fixed shaft 31.

[0058] When the belt needs to be tensioned, the tensioning wheel 32 is brought into contact with the belt. By rotating the rotating arm 21, the tensioning wheel 32 is brought into close contact with the belt, thus achieving belt tensioning. When the belt rotates, it drives the tensioning wheel 32 to rotate relative to the fixed shaft 31, thus avoiding sliding friction between the tensioning wheel 32 and the belt.

[0059] To reduce rotational friction between the fixed shaft 31 and the tensioning wheel 32, therefore, as follows: Figure 4 As shown, in one embodiment, the tensioning member 3 further includes a bearing 33, which is sleeved on the fixed shaft 31 and disposed between the fixed shaft 31 and the tensioning wheel 32.

[0060] By placing the bearing 33 between the fixed shaft 31 and the tensioning wheel 32, the bearing 33 can reduce the rotational friction when the tensioning wheel 32 rotates.

[0061] To reduce the weight of the rotating arm 21 so that the adjusting member 23 can push the rotating arm 21 to rotate, such as Figure 3 and 4 As shown, in one embodiment, the rotating arm 21 is provided with a weight-reducing groove 21a along its length.

[0062] By setting the weight reduction groove 21a, the weight of the rotating arm 21 can be reduced, making it easier for the adjusting member 23 to push the rotating arm 21 to rotate.

[0063] like Figure 1 and Figure 2 As shown, this utility model also provides a polishing machine, including the above-mentioned belt tensioning device.

[0064] The double-layer rice polishing machine has two polishing rollers spaced vertically apart. To drive the two rollers, two belt assemblies connect them to the motor. When tensioning the belt in the outer belt assembly is required, a sliding tensioning structure is typically used. However, due to the relatively compact layout of the polishing machine, the small gap between the sliding tensioning structure and the pulleys in the inner belt assembly hinders belt replacement. Therefore, if... Figure 1 and Figure 2As shown, in one embodiment, the polishing machine further includes a frame 4, a first pulley assembly 5, and a second pulley assembly 6. The first pulley assembly 5 includes a first pulley 51 and a second pulley 52 rotatably connected to the frame 4, and a first belt 53 respectively sleeved on the first pulley 51 and the second pulley 52. ​​The second pulley assembly 6 includes a third pulley 61 and a fourth pulley 62 rotatably connected to the frame 4, and a second belt 63 respectively sleeved on the third pulley 61 and the fourth pulley 62. The third pulley 61 is coaxially arranged with the first pulley 51 and is located on the side of the first pulley 51 away from the frame 4. A support base 1 is connected to the frame 4. A tensioning member 3 is disposed between the third pulley 61 and the fourth pulley 62. The tensioning member 3 is disposed outside the second belt 63 and can rotatably abut against the second belt 63.

[0065] When tensioning the second belt 63, the rotating arm 21 is rotated so that the tensioning wheel 32 is pressed tightly against the second belt 63, thus achieving tensioning of the second belt 63. Due to the rotating structure of the rotating arm 21, when the first belt 53 needs to be replaced, the rotating arm 21 is controlled to rotate by the adjusting member 23, so that the rotating arm 21 drives the tensioning wheel 32 to disengage from the second belt 63, leaving enough space for the first belt 53 to be replaced. Secondly, since the adjusting member 23 is connected to the rotating arm 21 via the lever arm 22, and the lever arm 22 is located at the rotating end of the rotating arm 21, both of which are offset from the moving end of the rotating arm 21 and the tensioning wheel 32, the adjusting member 23 will not intrude between the third pulley 61 and the fourth pulley 62, reducing the obstruction to belt replacement.

[0066] It should be understood that an additional belt tensioning device can be added to tension the first belt 53, and the setting method can refer to the belt tensioning device for tensioning the second belt 63.

[0067] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A belt tensioning device, characterized in that, include: Support base; A rotating assembly includes a rotating arm, a lever arm, and an adjusting component. The rotating arm has a rotating end and a movable end. The rotating end of the rotating arm is rotatably connected to the support base. The lever arm is connected to the rotating end of the rotating arm. The adjusting component is connected to the support base and the lever arm and is used to adjust the fixed angle of the rotating arm. and The tensioning element is rotatably connected to the movable end of the rotating arm.

2. The belt tensioning device according to claim 1, characterized in that, The adjusting component is threadedly connected to the support seat and slidably connected to the lever arm.

3. The belt tensioning device according to claim 2, characterized in that, The lever arm is provided with a sliding groove; The adjusting component includes a sliding rod, a sliding seat, and a screw. The sliding rod is slidably disposed in the sliding groove, the sliding seat is connected to the sliding rod, and the screw is threadedly connected to the support seat and rotatably connected to the sliding seat.

4. The belt tensioning device according to claim 3, characterized in that, One end of the screw has a prismatic circumference.

5. The belt tensioning device according to claim 3, characterized in that, The extension direction of the groove is perpendicular to the rotation axis of the rotating arm.

6. The belt tensioning device according to claim 1, characterized in that, The tensioning component includes a fixed shaft and a tensioning wheel. The fixed shaft is connected to the movable end of the rotating arm, and the tensioning wheel is rotatably sleeved on the fixed shaft.

7. The belt tensioning device according to claim 6, characterized in that, The tensioning element also includes a bearing, which is sleeved on the fixed shaft and disposed between the fixed shaft and the tensioning wheel.

8. The belt tensioning device according to claim 1, characterized in that, The rotating arm has a weight-reducing groove along its length.

9. A polishing machine, characterized in that, Includes the belt tensioning device as described in any one of claims 1-8.

10. The polishing machine according to claim 9, characterized in that, Also includes: frame; The first pulley assembly includes a first pulley and a second pulley rotatably connected to the frame, and a first belt respectively sleeved on the first pulley and the second pulley; The second pulley assembly includes a third pulley and a fourth pulley rotatably connected to the frame, and a second belt respectively sleeved on the third pulley and the fourth pulley. The third pulley is coaxially arranged with the first pulley and is located on the side of the first pulley away from the frame. The support base is connected to the frame, the tensioning member is disposed between the third pulley and the fourth pulley, and the tensioning member is disposed outside the second belt and can rotate to abut against the second belt.

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