Belt tensioning device

Abstract

The utility model discloses a belt tensioning device, which belongs to the technical field of transmission equipment and comprises a mounting frame and a tensioning structure arranged on one side of the mounting frame, the tensioning structure comprises a poly V-belt and a tensioning wheel, and the tensioning wheel is in contact with an inner ring of the poly V-belt and used for pressing the poly V-belt and enabling the poly V-belt to be in a tensioning state. And the tensioning arm is movably installed on one side of the installation frame and used for providing tensioning force for the tensioning wheel, the tensioning arm is rotationally installed on the tensioning wheel, and a reminding structure used for reminding when the belt is extruded to become loose is arranged on one side of the installation frame. When the poly V-belt is excessively stretched due to long-time extrusion, the tensioning arm can deflect along with the stretching degree of the poly V-belt, then the arc-shaped rack drives the rotating disc to rotate, the movable plate extrudes and triggers the control switch, and therefore the prompting lamp is turned on to generate light, and the prompting lamp can be installed in a vehicle or at a conspicuous position. Therefore, a driver is reminded to replace the damaged poly V-belt in time.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission equipment, and particularly relates to a belt tensioning device. Background Art

[0002] A tensioning device is a mechanical device used to maintain or adjust the tension of a transmission device (such as a transmission belt, chain, gear, etc.).

[0003] Chinese Patent Publication No. CN213125761U discloses a vehicle-mounted power take-off driving generator transmission device, including an engine. The characteristics are that: the output shaft of the engine is fixedly connected with a first pulley, the engine is fixedly connected with a bracket, the bracket is fixedly connected with a second automatic tensioning wheel mounting plate, the second automatic tensioning wheel mounting plate is fixedly connected with an automatic tensioning wheel, the second automatic tensioning wheel mounting plate is fixedly connected with a first automatic tensioning wheel mounting plate, the first automatic tensioning wheel mounting plate is fixedly connected with a bearing seat cushion plate, the engine is fixedly connected with a fourth bracket, the fourth bracket is fixedly connected with a generator mounting plate, the generator mounting plate is fixedly connected with a generator mounting bracket, and the generator mounting plate is fixedly connected with a connecting plate. The utility model relates to the field of transmission equipment, and specifically relates to a vehicle-mounted power take-off driving generator transmission device. The utility model is a vehicle-mounted power take-off driving generator transmission device, which is beneficial to realizing the installation of the generator.

[0004] In the above-mentioned disclosed prior art, the tensioning wheel can squeeze the multi-wedge belt to make it in a taut state. However, with long-term use, the continuously compressed multi-wedge belt will gradually be stretched, resulting in a decrease in the elasticity of the multi-wedge belt. Usually, the driver needs to actively observe the stretching situation of the multi-wedge belt, which is not convenient for timely reminding the driver, resulting in the inability to replace the multi-wedge belt in time. Content of the Utility Model

[0005] Aiming at the above-mentioned existing technical deficiencies, the purpose of the utility model is to provide a belt tensioning device to solve some or all of the problems in the above background art.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A belt tensioning device, comprising:

[0008] A mounting frame;

[0009] A tensioning structure arranged on one side of the mounting frame;

[0010] A reminder structure arranged on one side of the mounting frame and used in cooperation with the tensioning structure to give a reminder when the belt is squeezed and loosened;

[0011] The adjusting structure is arranged on one side of the mounting bracket and is used in cooperation with the reminding structure to adjust the reminding structure to return to the untriggered state.

[0012] Preferably, the tensioning structure includes:

[0013] Multi-wedge belt;

[0014] The tensioning pulley is in contact with the inner ring of the multi-wedge belt and is used to press on the multi-wedge belt to keep it in a taut state;

[0015] The tensioning arm is movably installed on one side of the mounting bracket, and the tensioning arm is rotatably installed on the tensioning pulley and is used to provide a tensioning force for the tensioning pulley.

[0016] Preferably, the reminding structure includes:

[0017] Fixed plate;

[0018] The control switch is arranged on one side of the fixed plate;

[0019] The warning light is electrically connected to the control switch and is used to generate a bright light for reminding;

[0020] The triggering assembly is arranged on one side of the mounting bracket and is used to squeeze and trigger the fixed plate.

[0021] Preferably, the triggering assembly includes:

[0022] The worm wheel is arranged on the fixed plate;

[0023] The turntable is rotatably installed on one side of the worm wheel;

[0024] The movable plate is arranged on the outer surface of the turntable;

[0025] The linkage gear is arranged on one side of the turntable;

[0026] The arc-shaped rack is meshed with the linkage gear and is used for transmission;

[0027] The mounting rod is arranged on the tensioning arm and the arc-shaped rack and is used to support the arc-shaped rack;

[0028] Wherein, the arc-shaped rack and the tensioning arm are on the same axis, and the control switch is on the moving track of the movable plate.

[0029] Preferably, the triggering assembly further includes:

[0030] The rotating shaft is arranged on one side of the turntable;

[0031] The limiting block is arranged on the outer surface of the rotating shaft;

[0032] The annular groove is opened inside the worm wheel, and the limiting block is movably installed in the annular groove;

[0033] A fixed stop block is arranged on the inner wall of the annular groove, and the fixed stop block is located on the moving track of the limit block.

[0034] Preferably, the adjusting structure includes:

[0035] A U-shaped frame is arranged on one side of the mounting frame;

[0036] A worm is meshed with a worm wheel, and the worm is rotatably installed inside the U-shaped frame;

[0037] A hexagonal cap is arranged at one end of the worm;

[0038] A limiting rotating block is arranged on one side of the worm wheel and serves as the rotation fulcrum of the worm wheel;

[0039] Among them, the limiting rotating block is rotatably installed inside the mounting frame.

[0040] Preferably, the adjusting structure further includes a rotating hole opened inside the U-shaped frame, and the worm is rotatably installed in the rotating hole to prevent the worm from loosening and shifting.

[0041] The beneficial effects of the present utility model are as follows:

[0042] In the present utility model, when the multi-wedge belt is stretched excessively due to long-term extrusion, the tensioning arm can deflect along with the stretching degree of the multi-wedge belt, and then drive the turntable to rotate through the arc-shaped rack, so that the movable plate presses and triggers the control switch, thereby turning on the warning light to generate light. The warning light can be installed inside the vehicle or in a conspicuous position to remind the driver to replace the damaged multi-wedge belt in time.

[0043] In the present utility model, when the multi-wedge belt needs to be replaced, the hexagonal cap can be rotated to drive the linkage gear to rotate in the reverse direction, and then drive the tensioning arm to deflect in the reverse direction through the arc-shaped rack, so that the tensioning wheel is disengaged from the extrusion of the multi-wedge belt, so as to take out the multi-wedge belt for replacement. After the replacement is completed, the hexagonal cap can be rotated in the reverse direction to make the tensioning wheel press on the multi-wedge belt again, and make the movable plate disengage from the contact with the control switch, so that it returns to the initial state for subsequent reminder use. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0045] Figure 1 It is a schematic structural diagram of a belt tensioning device provided by an embodiment of the present utility model;

[0046] Figure 2 Schematic diagram of the arc rack structure of a belt tensioning device provided by an embodiment of the present invention;

[0047] Figure 3 Schematic diagram of the worm connection structure of a belt tensioning device provided by an embodiment of the present invention;

[0048] Figure 4 Schematic diagram of the rotating shaft structure of a belt tensioning device provided by an embodiment of the present invention;

[0049] Figure 5 Schematic cross-sectional view of the worm gear of a belt tensioning device provided by an embodiment of the present invention.

[0050] Explanation of reference numerals:

[0051] 1. Mounting frame; 2. Multi-wedge belt; 201. Tensioning pulley; 202. Tensioning arm; 3. Fixed plate; 301. Control switch; 302. Warning light; 303. Worm gear; 304. Turntable; 305. Movable plate; 306. Linkage gear; 307. Arc rack; 308. Mounting rod; 4. Rotating shaft; 401. Limiting block; 402. Annular groove; 403. Fixed stop block; 5. U-shaped frame; 501. Worm; 502. Hexagonal cap; 503. Restricting rotating block; 504. Rotating hole. Detailed implementation manners

[0052] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0053] Embodiment 1:

[0054] As Figures 1 to 5 shown, the present invention provides a belt tensioning device, including: a mounting frame 1 and a tensioning structure arranged on one side of the mounting frame 1. The tensioning structure includes a multi-wedge belt 2 and a tensioning pulley 201 that contacts the inner ring of the multi-wedge belt 2 and presses on the multi-wedge belt 2 to keep it in a taut state. The tensioning arm 202 is movably installed on one side of the mounting frame 1 to provide a tensioning force for the tensioning pulley 201, and the tensioning arm 202 is rotatably installed on the tensioning pulley 201.

[0055] In order to remind the driver when the multi-wedge belt 2 is severely stretched due to long-term compression, a reminder structure for reminding when the belt is squeezed and loosened is arranged on one side of the mounting frame 1.

[0056] Among them, the reminder structure includes a fixing plate 3 and a control switch 301 arranged on one side of the fixing plate 3, a warning light 302 electrically connected to the control switch 301 for generating a bright light to give a reminder, and a trigger assembly arranged on one side of the mounting bracket 1 for squeezing and triggering the fixing plate 3. When the control switch 301 is triggered, the warning light 302 can be turned on to keep the warning light 302 constantly on. The warning light 302 can be installed inside the vehicle or in a conspicuous position to remind the driver to replace the multi-wedge belt 2 in time.

[0057] Specifically, the trigger assembly includes a worm gear 303 arranged on the fixing plate 3, a turntable 304 rotatably installed on one side of the worm gear 303, a movable plate 305 arranged on the outer surface of the turntable 304, a linkage gear 306 arranged on one side of the turntable 304, an arc-shaped rack 307 meshing with the linkage gear 306 for transmission, and a mounting rod 308 arranged on the tensioning arm 202 and the arc-shaped rack 307 for supporting the arc-shaped rack 307. The arc-shaped rack 307 and the tensioning arm 202 are located on the same axis. The control switch 301 is located on the movement track of the movable plate 305. The tensioning arm 202 will deflect with the stretching degree of the multi-wedge belt 2. The deflected tensioning arm 202 can drive the arc-shaped rack 307 to rotate through the mounting rod 308, so that the arc-shaped rack 307 drives the turntable 304 to rotate through the meshing with the linkage gear 306. When the turntable 304 rotates, it can drive the movable plate 305 to move in a circular motion and trigger the control switch 301.

[0058] Specifically, the trigger assembly further includes a rotating shaft 4 arranged on one side of the turntable 304, a limit block 401 arranged on the outer surface of the rotating shaft 4, an annular groove 402 opened inside the worm gear 303, the limit block 401 is movably installed in the annular groove 402, and a fixed stop block 403 arranged on the inner wall of the annular groove 402. The fixed stop block 403 is located on the movement track of the limit block 401. The rotating turntable 304 can drive the rotating shaft 4 to rotate on the inner wall of the worm gear 303, and the rotating shaft 4 can drive the limit block 401 to move in the annular groove 402, which can limit the rotation range of the rotating shaft 4.

[0059] Embodiment 2:

[0060] On the basis of Embodiment 1, in order to facilitate the replacement of the damaged multi-wedge belt 2 and at the same time restore the movable plate 305 and the fixing plate 3 to the initial state for convenient subsequent continued use, an adjusting structure for adjusting the reminder structure to return to the untriggered state is arranged on one side of the mounting bracket 1.

[0061] Among them, the adjusting structure includes a U-shaped frame 5 arranged on one side of the mounting bracket 1, a worm 501 meshed with the worm gear 303. The worm 501 is rotatably installed inside the U-shaped frame 5, a hexagonal cap 502 arranged at one end of the worm 501, and a limiting rotating block 503 arranged on one side of the worm gear 303 as the rotation fulcrum of the worm gear 303. The limiting rotating block 503 is rotatably installed inside the mounting bracket 1. By rotating the hexagonal cap 502, the hexagonal cap 502 can drive the worm 501 to rotate, and the continuously rotating worm 501 can drive the worm gear 303 to rotate through the cooperation with the worm gear 303.

[0062] Among them, the adjusting structure further includes a rotating hole 504 opened inside the U-shaped frame 5 to prevent the worm 501 from loosening and shifting. The worm 501 is rotatably installed in the rotating hole 504, and the hexagonal cap 502 can drive the worm 501 to rotate in the rotating hole 504, thereby preventing the worm 501 from shifting during rotation.

[0063] Working principle:

[0064] The tension arm 202 is based on the prior art for providing a tensioning force when tensioning a drive belt. It mainly applies a certain force to the chain or belt direction through the internal torsion spring. If the multi-wedge belt 2 is loosened and stretched due to long-term compression, under the action of the tension arm 202, it can drive the tensioning wheel 201 to fit the multi-wedge belt 2. At the same time, the tension arm 202 will deflect with the stretching degree of the multi-wedge belt 2. The deflected tension arm 202 can drive the arc-shaped rack 307 to rotate through the mounting rod 308. When the arc-shaped rack 307 rotates, it can drive the turntable 304 to rotate through the engagement with the linkage gear 306. When the turntable 304 rotates, it can drive the movable plate 305 to perform a circular motion. At the same time, the rotating turntable 304 can drive the rotating shaft 4 to rotate inside the inner wall of the worm gear 303. The rotating shaft 4 can drive the limit block 401 to move inside the annular groove 402. Due to the self-locking characteristic between the worm gear 303 and the worm 501, the worm gear 303 will not rotate following the turntable 304. As the multi-wedge belt 2 is stretched more and more severely, the continuously moving movable plate 305 will squeeze and trigger the control switch 301, thereby turning on the warning light 302 and making the warning light 302 stay on constantly. The warning light 302 can be installed inside the vehicle or in a conspicuous position to remind the driver to replace the multi-wedge belt 2 in time. At the same time, the moving limit block 401 will be blocked by the fixed stop block 403 to prevent the turntable 304 from rotating continuously. When the multi-wedge belt 2 needs to be replaced, the hexagonal cap 502 can be rotated. The hexagonal cap 502 can drive the worm 501 to rotate inside the rotation hole 504. The continuously rotating worm 501 can drive the worm gear 303 to rotate through the cooperation with the worm gear 303, making the worm gear 303 drive the limiting rotating block 503 to rotate inside the mounting frame 1, thereby preventing the worm gear 303 from shifting. The continuously rotating worm gear 303 can drive the fixed stop block 403 on the inner wall to perform a circular motion, making the fixed stop block 403 squeeze the limit block 401 and drive the rotating shaft 4 to rotate, and then the rotating shaft 4 drives the turntable 304 to rotate and reset, so that the worm gear 303 and the turntable 304 can drive the fixed plate 3 and the movable plate 305 to move simultaneously. When the turntable 304 resets, it can drive the linkage gear 306 to rotate and reset, and then the linkage gear 306 drives the arc-shaped rack 307 to rotate and reset. The reset arc-shaped rack 307 can drive the tension arm 202 to rotate in the reverse direction through the mounting rod 308, making the tension arm 202 drive the tensioning wheel 201 to slowly loosen the multi-wedge belt 2 for replacing the multi-wedge belt 2. After the replacement is completed, rotate the hexagonal cap 502 in the reverse direction to make the arc-shaped rack 307 rotate and reset, and slowly make the tension arm 202 drive the tensioning wheel 201 to press on the multi-wedge belt 2 again. Then rotate the hexagonal cap 502 continuously in the reverse direction. At this time, since the tensioning wheel 201 is pressing on the multi-wedge belt 2, it will not continue to rotate. At the same time, due to the influence of the arc-shaped rack 307 on the linkage gear 306, the turntable 304 will not rotate following the worm gear 303, making the reset worm gear 303 drive the fixed plate 3 and the control switch 301 to separate from the contact with the movable plate 305 and return to its initial state for the next reminder.

[0065] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model is also intended to include these changes and modifications.

Claims

1. A belt tensioning device, characterized in that, Comprising: Mounting bracket (1); Tensioning structure, arranged on one side of the mounting bracket (1); Reminder structure, arranged on one side of the mounting bracket (1), used in cooperation with the tensioning structure to give a reminder when the belt is squeezed and loosened; Adjusting structure, arranged on one side of the mounting bracket (1), used in cooperation with the reminder structure to adjust the reminder structure to return to the untriggered state.

2. The belt tensioning device according to claim 1, characterized in that, The tensioning structure includes: Multi-wedge belt (2); Tensioning pulley (201), in contact with the inner ring of the multi-wedge belt (2), used to press on the multi-wedge belt (2) and keep it in a taut state; Tensioning arm (202), movably installed on one side of the mounting bracket (1), and the tensioning arm (202) is rotatably installed on the tensioning pulley (201), used to provide a tensioning force for the tensioning pulley (201).

3. A belt tensioning device according to claim 1, characterized in that, The reminder structure includes: Fixed plate (3); Control switch (301), arranged on one side of the fixed plate (3); Warning light (302), electrically connected to the control switch (301), used to generate a bright light for reminder; Trigger assembly, arranged on one side of the mounting bracket (1), used to squeeze and trigger the fixed plate (3).

4. A belt tensioning device according to claim 3, characterized in that, The trigger assembly includes: Worm gear (303), arranged on the fixed plate (3); Turntable (304), rotatably installed on one side of the worm gear (303); Movable plate (305), arranged on the outer surface of the turntable (304); Linkage gear (306), arranged on one side of the turntable (304); Arc-shaped rack (307), meshed with the linkage gear (306), used for transmission; Mounting rod (308), arranged on the tensioning arm (202) and the arc-shaped rack (307), used to support the arc-shaped rack (307); Wherein, the arc-shaped rack (307) and the tensioning arm (202) are on the same axis line, and the control switch (301) is on the movement track of the movable plate (305).

5. The belt tensioning device according to claim 3, characterized in that, The trigger assembly further includes: Rotating shaft (4), arranged on one side of the turntable (304); Limit block (401), arranged on the outer surface of the rotating shaft (4); Annular groove (402), opened inside the worm gear (303), and the limit block (401) is movably installed in the annular groove (402); Fixed stop block (403), arranged on the inner wall of the annular groove (402), and the fixed stop block (403) is on the movement track of the limit block (401).

6. A belt tensioning device according to claim 1, characterized in that, The adjusting structure includes: U-shaped frame (5), arranged on one side of the mounting bracket (1); Worm (501), meshed with the worm gear (303), and the worm (501) is rotatably installed inside the U-shaped frame (5); Hexagonal cap (502), arranged at one end of the worm (501); Limit rotating block (503), arranged on one side of the worm gear (303), serving as the rotation fulcrum of the worm gear (303); Wherein, the limit rotating block (503) is rotatably installed inside the mounting bracket (1).

7. A belt tensioning device according to claim 1, characterized in that, The adjusting structure further includes a rotating hole (504) opened inside the U-shaped frame (5), and the worm (501) is rotatably installed in the rotating hole (504) to prevent the worm (501) from loosening and shifting.

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