Automatic tensioning device

Abstract

The utility model discloses an automatic tensioning device. The automatic tensioning device comprises a base; a one-way gear of the ratchet mechanism is rotationally connected with the base; one end of the pressing mechanism is connected with the one-way gear, and the other end of the pressing mechanism abuts against the loose edge of the chain or the V-shaped belt; one end of the adjusting and tensioning mechanism is connected with the base, and the other end of the adjusting and tensioning mechanism is connected with the pressing mechanism; the adjusting tensioning mechanism accumulates elastic tension potential energy and is used for pulling the pressing mechanism to rotate. According to the automatic tensioning device, automatic tensioning of the V belt and the chain is completed by adjusting tensioning of the tensioning mechanism, meanwhile, one-way increasing of tensioning force is achieved through the ratchet mechanism, and therefore the slipping phenomenon caused by insufficient friction force of the V belt due to the fact that the V belt is not tensioned in time in the V belt transmission process is avoided; and the problems of tooth jumping, jerking and unstable operation caused by pitch change in chain transmission are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of V-belt transmission and chain transmission tensioning equipment, and more specifically, to an automatic tensioning device. Background Art

[0002] Currently, V-belt drives are widely used due to their advantages of smooth operation, low noise, and minimal vibration. V-belt drives consist of a driving pulley, a driven pulley, a pressure pulley, and a V-belt. Sufficient friction is essential for V-belt transmissions; if friction decreases, the V-belt will slip and experience transmission failures. Chain drives offer advantages such as a longer transmission distance and a guaranteed transmission ratio. Chain drives consist of a driving sprocket, a driven sprocket, a pressure sprocket, and a chain. When a chain is subjected to force, the total length of the chain changes, causing jerking and other unsteady operation.

[0003] If slippage in a V-belt drive is not promptly addressed, the V-belt and pulley will spin idly. Due to the speed difference between the pulley and the V-belt, the temperature will rise sharply, causing damage to the V-belt. If chain tooth skipping is not promptly addressed, the impact load from the chain tooth skipping can cause equipment failures such as tooth snagging or chain breakage.

[0004] Therefore, how to provide automatic tensioning of V-belts and chains has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The purpose of the utility model is to provide an automatic tensioning device.

[0006] According to the utility model, an automatic tensioning device is provided, comprising:

[0007] base;

[0008] a ratchet mechanism, wherein the one-way gear of the ratchet mechanism is rotatably connected to the base;

[0009] A clamping mechanism, one end of which is connected to the one-way gear and the other end of which abuts against the loose edge of the chain or V-belt;

[0010] an adjusting tensioning mechanism, wherein one end of the adjusting tensioning mechanism is connected to the base, and the other end is connected to the pressing mechanism;

[0011] The adjusting tensioning mechanism accumulates elastic tension potential energy for pulling the pressing mechanism to rotate.

[0012] Furthermore, the ratchet mechanism further includes:

[0013] a pawl, one end of which is rotatably connected to the base and the other end of which is inserted into the teeth of the one-way gear;

[0014] A limiting column, the limiting column is arranged on the base and is used to limit the upward rotation angle of the pawl;

[0015] An elastic component, one end of which is connected to the base and the other end of which is in contact with the pawl, wherein the elastic component accumulates elastic potential energy to support the pawl to rotate upward.

[0016] Furthermore, one end of the pawl is rotatably connected to the base via a pin.

[0017] Furthermore, the elastic component includes a compression spring.

[0018] Furthermore, the pressing mechanism includes:

[0019] a connecting plate, wherein a first end of the connecting plate is connected to the center of the one-way gear, and the connecting plate can drive the one-way gear to rotate;

[0020] A pressure wheel is rotatably arranged at the second end of the connecting plate, and the pressure wheel abuts against the loose edge of the chain or the V-belt.

[0021] Furthermore, the pressure wheel is rotatably connected to the second end of the connecting plate through a bearing.

[0022] Furthermore, the clamping mechanism includes: an adjusting clamping nut, and the first end of the connecting plate is connected to the center of the one-way gear through the adjusting clamping nut.

[0023] Furthermore, the adjusting and tightening mechanism includes an elastic member, one end of which is connected to the base, and the other end of which is connected to the connecting plate.

[0024] Furthermore, the tension adjustment mechanism includes:

[0025] a first mounting seat, the first mounting seat being fixedly mounted on the base;

[0026] a second mounting base, the second mounting base being fixedly mounted on the connecting plate;

[0027] One end of the elastic member is connected to the first mounting seat, and the other end is connected to the second mounting seat.

[0028] Furthermore, the elastic member is a spring.

[0029] According to the technical content disclosed in this utility model, the following beneficial effects are achieved:

[0030] The utility model provides an automatic tensioning device, which automatically tightens the V-belt and chain by adjusting the tensioning mechanism, and realizes unidirectional growth of the tensioning force by using the ratchet mechanism, thereby solving the problems of slipping of the V-belt caused by insufficient friction of the V-belt due to untimely tensioning of the V-belt during V-belt transmission, and the problems of tooth skipping, jerking and unstable operation caused by pitch variation in chain transmission.

[0031] Other features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0033] Figure 1 The figure is a structural schematic diagram of an automatic tensioning device provided according to the utility model.

[0034] Explanation of the accompanying drawings: 1-pressure wheel; 2-second mounting seat; 3-elastic member; 4-first mounting seat; 5-base; 6-pawl; 7-limiting column; 8-elastic component; 9-connecting plate; 10-one-way gear; 11-adjusting clamping nut. DETAILED DESCRIPTION

[0035] 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 arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention.

[0036] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present invention, its application, or uses.

[0037] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0038] In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0039] It should be noted that like reference numerals and letters refer to like items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0040] like Figure 1As shown, according to the present invention, an automatic tensioning device is provided, which includes:

[0041] Base 5;

[0042] Ratchet mechanism, wherein the one-way gear 10 of the ratchet mechanism is rotatably connected to the base 5;

[0043] A clamping mechanism, one end of which is connected to the one-way gear 10, and the other end of which abuts against the loose side of the chain or V-belt;

[0044] Adjust the tensioning mechanism, connect one end of the tensioning mechanism to the base 5 and the other end to the pressing mechanism;

[0045] Adjust the tensioning mechanism to accumulate elastic tension potential energy, which is used to pull the pressing mechanism to rotate.

[0046] Furthermore, the ratchet mechanism further comprises:

[0047] A pawl 6, one end of which is rotatably connected to the base 5, and the other end of which is inserted into the teeth of the one-way gear 10;

[0048] The limiting column 7 is provided on the base 5 and is used to limit the upward rotation angle of the pawl 6;

[0049] The elastic component 8 has one end connected to the base 5 and the other end abutting against the pawl 6. The elastic component 8 accumulates elastic potential energy to support the pawl 6 to rotate upward.

[0050] Specifically, the one-way gear 10 is rotatable on the base 5, which can be achieved by a rotating shaft. One end of the clamping mechanism is connected to the one-way gear 10, and the other end is in contact with the loose edge of the chain or V-belt;

[0051] When the length of the chain or V-belt changes, the tensioning mechanism, connected at one end to the base 5 and at the other end to the clamping mechanism, accumulates elastic tension potential energy, which is used to rotate the clamping mechanism. Therefore, the tensioning mechanism accumulates elastic tension potential energy, which in turn causes the clamping mechanism to rotate. The rotation of the clamping mechanism drives the one-way gear 10 of the ratchet mechanism. The pawl 6, rotatably connected at one end to the base 5 and inserted into the teeth of the one-way gear 10, causes the one-way gear 10 to rotate. At this point, the pawl 6 rotates downward. Since the elastic component 8 is connected at one end to the base 5 and abuts against the pawl 6 at the other end, the elastic component 8 accumulates elastic potential energy, which supports the pawl 6's upward rotation. The elastic component 8, along with the stopper 7 on the base 5, limits the upward rotation angle of the pawl 6. The pawl 6 can be reset and locked against the one-way gear 10, changing the position of the clamping mechanism, thereby ensuring that the load does not significantly change during V-belt or chain transmission.

[0052] The utility model provides an automatic tensioning device, which automatically tightens the V-belt and chain by adjusting the tensioning mechanism, and realizes unidirectional growth of the tensioning force by using the ratchet mechanism, thereby solving the problems of slipping of the V-belt caused by insufficient friction of the V-belt due to untimely tensioning of the V-belt during V-belt transmission, and the problems of tooth skipping, jerking and unstable operation caused by pitch variation in chain transmission.

[0053] Optionally, one end of the pawl 6 is rotatably connected to the base 5 via a pin. This structure is simple and reliable.

[0054] Optionally, the elastic component 8 includes a compression spring. The compression spring has a simple structure and low cost.

[0055] In some optional embodiments, such as Figure 1 As shown, according to the present invention, an automatic tensioning device is provided, and the pressing mechanism of the automatic tensioning device includes:

[0056] A connecting plate 9, wherein a first end of the connecting plate 9 is connected to the center of the one-way gear 10, and the connecting plate 9 can drive the one-way gear 10 to rotate;

[0057] The pressure wheel 1 is rotatably arranged at the second end of the connecting plate 9, and the pressure wheel 1 abuts against the loose edge of the chain or the V-belt.

[0058] Furthermore, the pinch wheel 1 is rotatably connected to the second end of the connecting plate 9 via a bearing. During movement, the pinch wheel 1 generates rolling friction with the loose edge of the chain or the V-belt, resulting in low power consumption.

[0059] Furthermore, the clamping mechanism includes: an adjustable clamping nut 11 , and the first end of the connecting plate 9 is connected to the center of the one-way gear 10 through the adjustable clamping nut 11 .

[0060] This structure facilitates manual adjustment of the initial position of the pressing wheel 1 by adjusting the pressing nut 11 .

[0061] Furthermore, the tension adjustment mechanism includes an elastic member 3 , one end of the elastic member 3 is connected to the base 5 , and the other end is connected to the connecting plate 9 .

[0062] Furthermore, adjusting the tensioning mechanism includes:

[0063] A first mounting base 4, the first mounting base 4 is fixedly mounted on the base 5;

[0064] A second mounting base 2, the second mounting base 2 is fixedly mounted on the connecting plate 9;

[0065] One end of the elastic member 3 is connected to the first mounting base 4, and the other end is connected to the second mounting base 2. This structure is simple and reliable.

[0066] Furthermore, the elastic member 3 is a spring. The spring has a simple structure and low cost.

[0067] like Figure 1 As shown, according to the present invention, an automatic tensioning device is provided, which is explained below with a specific embodiment.

[0068] Mount the base 5 on the loose end of the chain drive or V-belt drive. A one-way gear 10 is rotatably mounted on the base 5 via a rotating shaft. The first end of the connecting plate 9 is connected to the center of the one-way gear 10 via an adjustable compression nut 11. The pressure wheel 1 is rotatably connected to the second end of the connecting plate 9 via a bearing.

[0069] The second mounting seat 2 is mounted on the connecting plate 9, and the first mounting seat 4 is mounted on the base 5. One end of the spring is connected to the first mounting seat 4, and the other end of the spring is connected to the second mounting seat 2. The spring accumulates elastic tension potential energy, which is used to pull the connecting plate 9 to rotate, thereby driving the pressure wheel 1 to rotate, changing the position of the pressure wheel 1 to automatically tighten the V-belt and chain.

[0070] In the initial stage, tighten the compression nut 11 and manually adjust the initial position of the compression wheel 1 by adjusting the compression nut 11. After the compression wheel 1 pre-tightens the loose side of the chain drive or V-belt drive, adjust the spring tension until it reaches the preset value. The spring tension will continue to apply a certain force to the connecting plate 9 of the compression mechanism. When the length of the chain or V-belt changes, the spring will automatically tighten and drive the one-way gear 10 in the ratchet mechanism to rotate. One end of the pawl 6 is rotatably connected to the base 5, and the other end is inserted into the teeth of the one-way gear 10, causing the one-way gear 10 to rotate. At this time, the pawl 6 rotates downward. Due to the tension of the compression spring and the limit column 7 set on the base 5, the upward rotation angle of the pawl 6 is limited. The pawl 6 can be reset and lock the one-way gear 10, and the position of the compression mechanism changes, thereby ensuring that the load does not change significantly during the V-belt or chain transmission.

[0071] In summary, the utility model provides an automatic tensioning device, which automatically tightens the V-belt and chain by adjusting the tensioning mechanism, and at the same time uses the ratchet mechanism to achieve unidirectional growth of the tensioning force, thereby solving the slipping phenomenon caused by insufficient friction of the V-belt due to untimely tightening of the V-belt during V-belt transmission, and the problems of tooth skipping, jerking and unstable operation caused by pitch changes in chain transmission.

[0072] This automatic tensioner has no drive mechanism and requires no additional energy, saving energy. It can be installed independently without the need for auxiliary brackets. Parts of the automatic tensioner are made of corrosion-resistant metal, making it environmentally friendly and pollution-free. It also features a ratchet mechanism for locking the tensioner. The automatic tensioner has an automatic tensioning function.

[0073] Although some specific embodiments of the present invention have been described in detail through examples, those skilled in the art will appreciate that the above examples are for illustration only and are not intended to limit the scope of the present invention. Those skilled in the art will appreciate that modifications may 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. An automatic tensioning device, characterized in that: include: base; a ratchet mechanism, wherein the one-way gear of the ratchet mechanism is rotatably connected to the base; A clamping mechanism, one end of which is connected to the one-way gear and the other end of which abuts against the loose edge of the chain or V-belt; The clamping mechanism includes: a connecting plate, a first end of which is connected to the center of the one-way gear, and the connecting plate can drive the one-way gear to rotate; a pressure wheel, which is rotatably arranged at the second end of the connecting plate and abuts against the loose edge of the chain or V-belt; the pressure wheel is rotatably connected to the second end of the connecting plate through a bearing; the clamping mechanism includes: an adjusting pressure nut, the first end of the connecting plate is connected to the center of the one-way gear through the adjusting pressure nut; an adjusting tensioning mechanism, wherein one end of the adjusting tensioning mechanism is connected to the base, and the other end is connected to the pressing mechanism; The adjusting tensioning mechanism accumulates elastic tension potential energy for pulling the pressing mechanism to rotate.

2. The automatic tensioning device according to claim 1, characterized in that: The ratchet mechanism further comprises: a pawl, one end of which is rotatably connected to the base and the other end of which is inserted into the teeth of the one-way gear; A limiting column, the limiting column is arranged on the base and is used to limit the upward rotation angle of the pawl; An elastic component, one end of which is connected to the base and the other end of which is in contact with the pawl, wherein the elastic component accumulates elastic potential energy to support the pawl to rotate upward.

3. The automatic tensioning device according to claim 2, characterized in that: One end of the pawl is rotatably connected to the base through a pin shaft.

4. The automatic tensioning device according to claim 2, characterized in that: The elastic component includes a compression spring.

5. The automatic tensioning device according to claim 1, characterized in that: The adjusting and tightening mechanism includes an elastic member, one end of which is connected to the base, and the other end of which is connected to the connecting plate.

6. The automatic tensioning device according to claim 5, characterized in that: The tension adjustment mechanism comprises: a first mounting seat, the first mounting seat being fixedly mounted on the base; a second mounting base, the second mounting base being fixedly mounted on the connecting plate; One end of the elastic member is connected to the first mounting seat, and the other end is connected to the second mounting seat.

7. The automatic tensioning device according to claim 5, characterized in that: The elastic member is a spring.

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