Tensioning mechanism for chain and transmission device

Abstract

The utility model relates to the technical field of tensioning mechanisms, in particular to a chain tensioning mechanism which comprises a first tensioning assembly and a second tensioning assembly, the first tensioning assembly comprises a tensioning seat, a tensioning shaft and a tensioning chain wheel, the tensioning seat is movably arranged on a bottom plate of external equipment, the tensioning shaft is arranged on the tensioning seat, and the tensioning chain wheel is arranged on the tensioning shaft. The tensioning chain wheel is rotationally arranged on the tensioning shaft, the second tensioning assembly comprises a tensioning support, a tensioning bolt and an elastic piece, the tensioning support is arranged on the bottom plate and located above the first tensioning assembly, the tensioning bolt is arranged on the tensioning support and makes contact with or is separated from the tensioning shaft, and the elastic piece is arranged on the tensioning bolt through a limiting piece. And the elastic piece is in contact with the tensioning shaft and is in a contracted state. According to the tensioning mechanism for the chain, the chain can be kept in a tensioning state all the time, the tensioning effect of the chain is good, and the tensioning mechanism does not need to be adjusted frequently.

Description

TECHNICAL FIELD

[0001] The utility model relates to a tensioning mechanism technical field, concretely relates to a tensioning mechanism and transmission device for chain. BACKGROUND

[0002] At present, the commonly used tensioning mechanism for chain is mostly locking mechanism, the locking mechanism needs to be adjusted regularly, and the adjusted chain is relatively tight, the chain will pull back part of the locking mechanism when running, and the chain itself also has the problem of lengthening when in use, which will all lead to poor tensioning effect of the chain, short time of the chain tensioning state, and frequent observation and adjustment of the chain by artificial, otherwise the chain will jump and loosen. Therefore, a tensioning mechanism and transmission device for chain are needed to solve the above problems. SUMMARY

[0003] In order to solve the technical problem that the chain still needs to be adjusted frequently after being tensioned by the existing locking mechanism, the utility model provides a tensioning mechanism and transmission device for chain, which can always keep the chain in a tensioning state, has good tensioning effect of the chain, and does not need to be adjusted frequently.

[0004] The utility model provides a tensioning mechanism for chain, the tensioning mechanism includes first tensioning component and second tensioning component, the first tensioning component includes tensioning seat, tensioning shaft and tensioning sprocket, the tensioning seat is movably arranged on the bottom plate of external equipment, the tensioning shaft is arranged on the tensioning seat, the tensioning sprocket is rotatably arranged on the tensioning shaft, the second tensioning component includes tensioning support, tensioning bolt and elastic piece, the tensioning support is arranged on the bottom plate and located above the first tensioning component, the tensioning bolt is arranged on the tensioning support and the tensioning bolt is in contact with or separated from the tensioning shaft, the elastic piece is arranged on the tensioning bolt through the limiting piece, the elastic piece is in contact with the tensioning shaft and the elastic piece is in the contraction state.

[0005] Further, the tensioning support is of L-shaped structure, the upper part of the tensioning support is fixedly connected to the bottom plate, the lower part of the tensioning support is provided with an opening and a welded nut, the opening and the welded nut are coaxially arranged and the opening is located above the welded nut, the tensioning bolt passes through the opening and the welded nut and is locked on the tensioning support through the tensioning nut, the tensioning nut is located above the opening, a limiting groove is arranged on the position corresponding to the tensioning bolt of the tensioning shaft, the end of the tensioning bolt is in contact with or separated from the limiting groove, and the end of the elastic piece is in contact with the limiting groove. The tensioning bolt is fixed to the tensioning support through the tensioning nut and the welded nut, so as to avoid loosening of the tensioning bolt in use. The limiting groove is arranged to ensure that the end of the elastic piece can better contact with the tensioning shaft, so as to avoid deviation of the elastic piece and failure to support the tensioning shaft.

[0006] Furthermore, the limiting component includes two limiting nuts, which are disposed on the tensioning bolt and located below the welding nut, and the two limiting nuts are in contact with each other. The elastic component is a tension spring, which is sleeved on the tensioning bolt and located below the limiting nuts. The two ends of the tension spring are in contact with the limiting nut and the limiting groove, respectively.

[0007] Furthermore, the upper part of the tensioning bracket is provided with a first through hole, and the tensioning bracket is fixedly connected to the base plate through the first through hole and the first bolt. The tensioning bracket is fixed to the base plate of the external equipment through the first through hole and the first bolt.

[0008] Furthermore, a second through hole is provided on one side of the tensioning seat, and the tensioning seat is connected to the base plate through the second through hole and a second bolt, and the tensioning seat can rotate circumferentially around the second bolt; one end of the tensioning shaft is fixedly connected to the other side of the tensioning seat, and the other end of the tensioning shaft is rotatably connected to the tensioning sprocket. The tensioning seat is fixed to the base plate through the second through hole and the second bolt.

[0009] Furthermore, the outer diameter of the tensioning shaft gradually decreases from the head end to the tail end. The end of the tensioning shaft closer to the tensioning seat is designated as the head end, and the end farther from the tensioning seat is designated as the tail end. A boss is provided at the head end of the tensioning shaft, and an inner groove matching the boss is provided on the other side of the tensioning seat. The boss engages with the inner groove. A bearing is located at the center of the tensioning sprocket, and the tail end of the tensioning shaft passes through the bearing and is fixedly connected to it. The boss engaging with the inner groove secures the tensioning shaft to the tensioning seat. The tensioning sprocket rotates relative to the tensioning shaft via the bearing.

[0010] Furthermore, retaining rings are provided between both ends of the tension sprocket and the bearing. The purpose of providing retaining rings is to limit the bearing and prevent it from shifting.

[0011] Compared with the prior art, the present invention has the following technical effects: The chain tensioning mechanism of the present invention can keep the chain in a taut state at all times, with good chain tensioning effect, and the tensioning mechanism itself does not need to be frequently adjusted.

[0012] This utility model provides a transmission device, including a chain and two drive sprockets. The two drive sprockets are rotatably mounted on the base plate of an external device via bearing seats. The transmission device also includes a tensioning mechanism as described in any of the above claims. A tensioning sprocket on the tensioning mechanism is located between the two drive sprockets, and the chain is wound around the tensioning sprocket and the two drive sprockets.

[0013] Compared with the prior art, the present invention has the following technical effects: the transmission device of the present invention can always keep the chain in a taut state, the chain tensioning effect is good, and the tensioning mechanism itself does not need to be frequently adjusted. Attached Figure Description

[0014] Figure 1 This is a front view structural schematic diagram of a chain tensioning mechanism according to Embodiment 1 of this utility model;

[0015] Figure 2 This is a rear view structural schematic diagram of the tensioning mechanism according to Embodiment 1 of this utility model;

[0016] Figure 3 This is a schematic diagram of the tensioning seat according to Embodiment 1 of this utility model;

[0017] Figure 4 This is a schematic diagram of the tensioning shaft according to Embodiment 1 of this utility model;

[0018] Figure 5 This is a schematic diagram of the fixed connection between the tensioning seat and the tensioning shaft in Embodiment 1 of this utility model;

[0019] Figure 6 This is a front view structural schematic diagram of the tensioning sprocket according to Embodiment 1 of this utility model;

[0020] Figure 7 This is a rear view structural schematic diagram of the tensioning sprocket according to Embodiment 1 of this utility model;

[0021] Figure 8 This is a schematic diagram of the structure of a transmission device according to Embodiment 2 of this utility model;

[0022] The numbers in the attached diagram are:

[0023] 1. Tensioning seat; 11. Second through hole; 12. Embedded groove; 2. Tensioning shaft; 21. Limiting groove; 22. Boss; 3. Tensioning sprocket; 31. Bearing; 32. Retaining ring; 4. Tensioning bracket; 41. Welding nut; 42. Tensioning nut; 43. First through hole; 5. Tensioning bolt; 6. Limiting component; 61. Limiting nut; 7. Tensioning spring; 8. Drive sprocket; 9. Chain. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-7As shown in Embodiment 1, a chain tensioning mechanism includes a first tensioning component and a second tensioning component. The first tensioning component includes a tensioning seat 1, a tensioning shaft 2, and a tensioning sprocket 3. The tensioning seat 1 is movably mounted on the base plate of an external device. The tensioning shaft 2 is mounted on the tensioning seat 1, and the tensioning sprocket 3 is rotatably mounted on the tensioning shaft 2. The second tensioning component includes a tensioning bracket 4, a tensioning bolt 5, and an elastic element. The tensioning bracket 4 is mounted on the base plate and is located above the first tensioning component. The tensioning bolt 5 is mounted on the tensioning bracket 4 and is in contact with or separate from the tensioning shaft 2. The elastic element is mounted on the tensioning bolt 5 via a limiting member 6 and is in contact with the tensioning shaft 2 and is in a contracted state. This embodiment of the chain tensioning mechanism can be installed on various devices to tension the chain 9 on those devices. This embodiment applies the tensioning mechanism to a fryer to tension the chain 9 on the fryer. Tensioner seat 1 is movably mounted on the base plate of the fryer. Tensioner shaft 2 is mounted on tensioner seat 1 and is rotatably connected to tensioner sprocket 3. Tensioner sprocket 3 can rotate and its position relative to the base plate can be adjusted. Tensioner bracket 4 is fixed to the base plate of the fryer. Tensioner bolt 5 is mounted on tensioner bracket 4 and is in contact with or separate from tensioner shaft 2. Elastic element is in contact with tensioner shaft 2 and is always in a contracted state. The elastic element can adjust the position of tensioner sprocket 3 to ensure that tensioner sprocket 3 tensions chain 9.

[0026] The working process of the tensioning mechanism is as follows: Initially, after the tensioning bolt 5 is tightened onto the tensioning bracket 4, the tensioning bolt 5 is in contact with the tensioning shaft 2, and the elastic element is in contact with the tensioning shaft 2 and is in a contracted state. The tensioning bolt 5 and the elastic element press against the tensioning shaft 2, thereby causing the tensioning sprocket 3 to tension the chain 9 of the fryer. The tensioning sprocket 3 keeps the chain 9 in a taut state. After a certain period of use, the tensioning bolt 5 may loosen and create a gap between it and the tensioning shaft 2, or as the chain 9 is stretched, the elastic element may still be in contact with the tensioning shaft 2 and be in a contracted state. Because the tensioning seat 1 is movable, the elastic element presses against the tensioning shaft 2, thereby adjusting the positions of the tensioning seat 1, the tensioning shaft 2, and the tensioning sprocket 3 (at this time, the tensioning seat 1 rotates and its position shifts downward, and the tensioning shaft 2 and the tensioning sprocket 3 shift downward). The action of the elastic element causes the tensioning sprocket 3 to continue to tension the chain 9 of the fryer, and the tensioning sprocket 3 keeps the chain 9 in a taut state. The elastic element can continue to provide tension within a certain range, avoiding frequent adjustments to the tensioning bolt 5. After long-term use, the elastic element can be adjusted by adjusting the limiting element 6, that is, by adjusting the limiting element 6, the elastic element can always be kept in a contracted state. The adjustment method is simple and quick to operate.

[0027] The tensioning mechanism in this embodiment can always keep the chain 9 taut, resulting in good tension and eliminating the need for frequent adjustments. Furthermore, the overall structure of the tensioning mechanism is simple and adaptable, suitable for flat, side, and vertical mounting, and easy to install and adjust, requiring only a wrench.

[0028] In one possible implementation, the tensioning bracket 4 has an L-shaped structure. The upper part of the tensioning bracket 4 is fixedly connected to the base plate, and the lower part of the tensioning bracket 4 is provided with an opening and a welded nut 41. The opening and the welded nut 41 are coaxially arranged, with the opening located above the welded nut 41. The tensioning bolt 5 passes through the opening and the welded nut 41 and is locked onto the tensioning bracket 4 by a tensioning nut 42, which is located above the opening. A limiting groove 21 is provided on the tensioning shaft 2 at a position corresponding to the tensioning bolt 5. The end of the tensioning bolt 5 contacts or separates from the limiting groove 21, and the end of the elastic element contacts the limiting groove 21. The tensioning bolt 5 is fixed to the tensioning bracket 4 by the tensioning nut 42 and the welded nut 41, minimizing the possibility of loosening during use. The limiting groove 21 ensures that the end of the elastic element can better contact the tensioning shaft 2, preventing the elastic element from shifting and failing to hold the tensioning shaft 2 in place.

[0029] In one possible implementation, the limiting member 6 includes two limiting nuts 61, which are disposed on the tension bolt 5 and located below the welding nut 41. The two limiting nuts 61 are in contact with each other. The elastic member is a tension spring 7, which is sleeved on the tension bolt 5 and located below the limiting nuts 61. The two ends of the tension spring 7 are in contact with the limiting nuts 61 and the limiting groove 21, respectively. In this embodiment, there are two limiting nuts 61 that are in contact with each other. During use, the force between the two limiting nuts 61 ensures that they remain fixed on the tension bolt 5, thereby ensuring that the limiting nuts 61 always press down on the tension spring 7, keeping the tension spring 7 in a contracted state.

[0030] After a period of use, the tension bolt 5 may loosen, creating a gap between it and the tension shaft 2. However, the tension spring 7 remains in contact with the tension shaft 2 and is in a contracted state. Because the tension seat 1 is movable, the tension spring 7 presses against the tension shaft 2, thereby adjusting the positions of the tension seat 1, tension shaft 2, and tension sprocket 3 (at this time, the tension seat 1 rotates and its position shifts downward, and the tension shaft 2 and tension sprocket 3 shift downward). The tension spring 7 causes the tension sprocket 3 to continue to tension the chain 9 of the fryer, keeping the chain 9 taut. The tension spring 7 can continue to provide tension within a certain range, avoiding frequent adjustments to the tension bolt 5. If the elastic force of the tension spring 7 decreases after long-term use, the tension spring 7 can be adjusted by adjusting the position of the limit nut 61 on the tension bolt 5 (that is, adjusting the limit nut 61 downward to make it closer to the tension shaft 2), thereby compressing the tension spring 7 and keeping it in a contracted state.

[0031] In one possible implementation, the upper part of the tensioning bracket 4 is provided with a first through hole 43, and the tensioning bracket 4 is fixedly connected to the base plate through the first through hole 43 and a first bolt. The tensioning bracket 4 is fixed to the base plate of the fryer through the first through hole 43 and the first bolt. Two first through holes 43 are provided to ensure greater stability after the tensioning bracket 4 is fixed to the base plate.

[0032] In one possible implementation, a second through hole 11 is provided on one side of the tensioning seat 1. The tensioning seat 1 is connected to the base plate through the second through hole 11 and the second bolt. The tensioning seat 1 is fixed to the base plate of the fryer through the second through hole 11 and the second bolt, and the tensioning seat 1 can rotate circumferentially around the second bolt. One end of the tensioning shaft 2 is fixedly connected to the other side of the tensioning seat 1, and the other end of the tensioning shaft 2 is rotatably connected to the tensioning sprocket 3. When the tensioning bolt 5 is in contact with the tensioning shaft 2, the tensioning spring 7 is in contact with the tensioning shaft 2, or only the tensioning spring 7 is in contact with the tensioning shaft 2, the tensioning seat 1 can rotate circumferentially around the second bolt, thereby adjusting the position of the tensioning shaft 2 and the tensioning sprocket 3. The tensioning sprocket 3 is always tensioned on the chain 9 of the fryer, keeping the chain 9 in a taut state.

[0033] Furthermore, the position of the tensioning seat 1 on the base plate of the fryer can be adjusted (it can be adjusted according to the position of the chain 9). When the installation position of the tensioning seat 1 changes, the installation position of the tensioning bracket 4 should also be adjusted accordingly. Regardless of how the installation positions of the tensioning seat 1 and the tensioning bracket 4 are adjusted, the ultimate goal is to make the tensioning sprocket 3 tension the chain 9.

[0034] In one possible implementation, the outer diameter of the tensioning shaft 2 gradually decreases from the head end to the tail end, and the width of the head end of the tensioning shaft 2 is greater than the width of the tail end. The end of the tensioning shaft 2 closest to the tensioning seat 1 is designated as the head end, and the end of the tensioning shaft 2 furthest from the tensioning seat 1 is designated as the tail end. A boss 22 is provided at the head end of the tensioning shaft 2, and an inner groove 12 matching the boss 22 is provided on the other side of the tensioning seat 1. The boss 22 is engaged in the inner groove 12, thus fixing the tensioning shaft 2 to the tensioning seat 1. To ensure the boss 22 remains stable in the inner groove 12, the two can also be welded together. A bearing 31 is provided at the center of the tensioning sprocket 3, and the tail end of the tensioning shaft 2 passes through and is fixedly connected to the bearing 31. The tensioning sprocket 3 rotates relative to the tensioning shaft 2 through the bearing 31.

[0035] As one possible implementation, retaining rings 32 are provided between both ends of the tensioning sprocket 3 and the bearing 31. The purpose of providing retaining rings 32 is to limit the bearing 31 and prevent it from shifting. In this embodiment, the bearing 31 is a deep groove ball bearing.

[0036] like Figure 8 As shown in Embodiment 2, a transmission device includes a chain 9 and two drive sprockets 8. The two drive sprockets 8 are rotatably mounted on the base plate of an external device via bearing seats, that is, the two drive sprockets 8 are fixed to the base plate of the fryer. The transmission device also includes a tensioning mechanism as described in any of the above embodiments. The tensioning sprocket 3 on the tensioning mechanism is located between the two drive sprockets 8, and the chain 9 is wound around the tensioning sprocket 3 and the two drive sprockets 8.

[0037] The transmission device operates as follows: The two drive sprockets 8 rotate, thus driving the chain 9 to rotate. Since the tension sprocket 3 also meshes with the chain 9, it also rotates. The tension spring 7 contacts the tension shaft 2 and is in a contracted state. Because the tension seat 1 is movable, the tension spring 7 presses against the tension shaft 2, thereby adjusting the positions of the tension seat 1, tension shaft 2, and tension sprocket 3 (at this time, the tension seat 1 rotates circumferentially relative to the second bolt, shifting its position downwards; the tension shaft 2 and tension sprocket 3 also shift downwards). The tension spring 7 continues to tension the tension sprocket 3 on the chain 9, keeping the chain 9 taut. In this embodiment, the transmission device can always keep the chain 9 taut, providing good tension, and the tensioning mechanism itself does not require frequent adjustments.

[0038] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made to the principles and process conditions of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A chain tensioning mechanism, the tensioning mechanism comprising a first tensioning component and a second tensioning component, characterized in that, The first tensioning assembly includes a tensioning seat (1), a tensioning shaft (2), and a tensioning sprocket (3). The tensioning seat (1) is movably mounted on the base plate of the external equipment. The tensioning shaft (2) is mounted on the tensioning seat (1). The tensioning sprocket (3) is rotatably mounted on the tensioning shaft (2). The second tensioning assembly includes a tensioning bracket (4), a tensioning bolt (5), and an elastic element. The tensioning bracket (4) is mounted on the base plate and located above the first tensioning assembly. The tensioning bolt (5) is mounted on the tensioning bracket (4) and is in contact with or separate from the tensioning shaft (2). The elastic element is mounted on the tensioning bolt (5) through a limiting element (6). The elastic element is in contact with the tensioning shaft (2) and is in a contracted state.

2. The tensioning mechanism according to claim 1, characterized in that, The tensioning bracket (4) has an L-shaped structure. The upper part of the tensioning bracket (4) is fixedly connected to the base plate. The lower part of the tensioning bracket (4) is provided with an opening and a welding nut (41). The opening and the welding nut (41) are coaxially arranged, and the opening is located above the welding nut (41). The tensioning bolt (5) passes through the opening and the welding nut (41) and is locked on the tensioning bracket (4) by the tensioning nut (42). The tensioning nut (42) is located above the opening. The tensioning shaft (2) is provided with a limiting groove (21) at the position corresponding to the tensioning bolt (5). The end of the tensioning bolt (5) is in contact with or separate from the limiting groove (21). The end of the elastic element is in contact with the limiting groove (21).

3. The tensioning mechanism according to claim 2, characterized in that, The limiting member (6) includes two limiting nuts (61), which are set on the tensioning bolt (5) and located below the welding nut (41). The two limiting nuts (61) are in contact with each other. The elastic member is a tension spring (7), which is sleeved on the tensioning bolt (5) and located below the limiting nuts (61). The two ends of the tension spring (7) are in contact with the limiting nut (61) and the limiting groove (21) respectively.

4. The tensioning mechanism according to claim 2, characterized in that, The upper part of the tensioning bracket (4) is provided with a first through hole (43), and the tensioning bracket (4) is fixedly connected to the base plate through the first through hole (43) and the first bolt.

5. The tensioning mechanism according to claim 1, characterized in that, The tensioning seat (1) has a second through hole (11) on one side. The tensioning seat (1) is connected to the base plate through the second through hole (11) and the second bolt. The tensioning seat (1) can rotate circumferentially around the second bolt. One end of the tensioning shaft (2) is fixedly connected to the other side of the tensioning seat (1), and the other end of the tensioning shaft (2) is rotatably connected to the tensioning sprocket (3).

6. The tensioning mechanism according to claim 5, characterized in that, The outer diameter of the tensioning shaft (2) gradually decreases from the head end to the tail end. The end of the tensioning shaft (2) closer to the tensioning seat (1) is designated as the head end, and the end of the tensioning shaft (2) further away from the tensioning seat (1) is designated as the tail end. The head end of the tensioning shaft (2) is provided with a boss (22), and the other side of the tensioning seat (1) is provided with an inner groove (12) that matches the boss (22). The boss (22) is inserted into the inner groove (12). The center of the tensioning sprocket (3) is provided with a bearing (31), and the tail end of the tensioning shaft (2) passes through the bearing (31) and is fixedly connected to it.

7. The tensioning mechanism according to claim 6, characterized in that, A retaining ring (32) is provided between both ends of the tension sprocket (3) and the bearing (31).

8. A transmission device comprising a chain (9) and two drive sprockets (8), the two drive sprockets (8) being rotatably mounted on the base plate of an external device via bearing seats, characterized in that, The transmission device further includes a tensioning mechanism as described in any one of claims 1 to 7, wherein the tensioning sprocket (3) on the tensioning mechanism is located between two drive sprockets (8), and the chain (9) is wound around the tensioning sprocket (3) and the two drive sprockets (8).

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