Toothed belt tensioning device

Abstract

The utility model discloses a cog belt tensioning device. The cog belt tensioning device comprises a fixing piece, a first tensioning rod, a first wheel frame and a first adjusting frame. The fixing piece is used for fixing the tensioning device on an external steel ring; the first tensioning rod is installed at the front end of the fixing piece and extends in the front-back direction. The first wheel carrier is arranged on the first tensioning rod and extends in the left-right direction; a first tensioning wheel is rotationally arranged at one end of the top surface of the first wheel frame, and a first belt wheel is rotationally arranged at the other end; the first adjusting frame is movably arranged on the first tensioning rod in the front-back direction and located on the front side of the first wheel frame. A second belt wheel is rotationally arranged on the top surface of the first adjusting frame; the first belt wheel and the second belt wheel are both tooth-shaped wheels and can be meshed with the tooth surface of the tooth-shaped belt. The toothed belt is sequentially wound around the first tensioning wheel, the second belt wheel, the external speed change disc and the first belt wheel. Through the arrangement, the friction loss between the belt wheel and the cog belt can be reduced, the transmission stability is improved, and the service life of equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of synchronous belt drive structure, and in particular to a toothed belt tensioning device. Background Technology

[0002] Toothed belts are commonly used in industrial equipment for synchronous transmission. To ensure tension and operational stability, they are usually equipped with tensioning devices. Currently, common belt adjustment frames have multiple tension pulleys, most of which are smooth pulleys.

[0003] During use, at least two tension pulleys will be in contact with the toothed belt. When the equipment is frequently started, stopped, or accelerated and decelerated, slippage can easily occur between the tension pulleys and the toothed belt, generating friction. This not only wears down the toothed belt pulleys but also causes the toothed belt to lengthen due to thermal effects, affecting transmission accuracy and service life. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a toothed belt tensioning device. This device provides stable engagement between the pulley and the toothed belt, reducing pulley friction loss and extending service life.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A toothed belt tensioning device includes: a fixing member, a first tensioning rod, a first wheel frame, and a first adjusting frame; the fixing member is used to fix the tensioning device to an outer steel ring; the first tensioning rod is installed at the front end of the fixing member and extends in the front-rear direction; the first wheel frame is installed on the first tensioning rod and extends in the left-right direction; a first tensioning wheel is rotatably mounted at one end of the top surface of the first wheel frame, and a first pulley is rotatably mounted at the other end; the first adjusting frame is movably mounted on the first tensioning rod in the front-rear direction and is located in front of the first wheel frame; a second pulley is rotatably mounted on the top surface of the first adjusting frame; both the first pulley and the second pulley are toothed pulleys, which can respectively mesh with the toothed surface of the toothed belt; the toothed belt is sequentially wound around the first tensioning wheel, the second pulley, an outer speed-changing disc, and the first pulley, and the movement of the first adjusting frame is used to adjust the tension of the toothed belt.

[0007] Furthermore, the bottom of the first adjustment frame is provided with a locking element for fixing the first adjustment frame to the first tensioning rod.

[0008] Furthermore, the first adjustment frame is provided with a fine-tuning part for adjusting the distance between the first adjustment frame and the first wheel frame, and the fine-tuning part is fitted onto the first tensioning rod.

[0009] Furthermore, the fastener is an open-type clamp structure that is snapped onto the surface of the outer steel ring.

[0010] Furthermore, the first pulley, the second pulley, and the first tensioning pulley are each provided with a bearing, and a short shaft is provided in the middle of the bearing along the vertical direction; the first pulley and the first tensioning pulley are rotatably mounted on the first wheel frame through the bearing and the short shaft, and the second pulley is rotatably mounted on the first adjusting frame through the bearing and the short shaft.

[0011] Furthermore, the left end of the first wheel frame includes a first mounting hole and a second mounting hole from front to back, and the right end includes a third mounting hole and a fourth mounting hole from front to back; when the toothed belt enters the tensioning device from the right side, the first tensioning wheel is installed in the third mounting hole, the first pulley is installed in the second mounting hole, and the second pulley is basically located on the left side of the first tensioning rod; when the toothed belt enters the tensioning device from the left side, the first tensioning wheel is installed in the first mounting hole, the first pulley is installed in the fourth mounting hole, and the second pulley is basically located on the right side of the first tensioning rod.

[0012] Furthermore, above the first tensioning rod, the tensioning device also includes: a second tensioning rod arranged parallel to the first tensioning rod; a second wheel frame arranged corresponding to the first wheel frame, the second wheel frame being mounted on the second tensioning rod; the second wheel frame being provided with a second tensioning wheel corresponding to the first tensioning wheel and a third pulley corresponding to the first pulley; a second adjustment frame arranged corresponding to the first adjustment frame, the second adjustment frame being mounted on the second tensioning rod; the second adjustment frame being provided with a fourth pulley corresponding to the second pulley; and also includes two connecting rods and a support rod, the connecting rods being vertically installed in two spaces among the first mounting hole, the second mounting hole, the third mounting hole, and the fourth mounting hole, for connecting the first wheel frame and the second wheel frame; the support rod being vertically arranged in front of the first tensioning rod and the second tensioning rod, the top of the support rod being connected to the front end of the second tensioning rod, and the bottom being connected to the front end of the first tensioning rod.

[0013] The aforementioned toothed belt tensioning device avoids the slippage and wear problems caused by traditional smooth tensioning wheels by configuring pulleys that mesh with the toothed belt on multiple adjustable structures. It also achieves precise control of the toothed belt tension by moving the position of the first adjusting frame, which effectively improves the meshing stability and transmission accuracy of the device and extends the service life of the toothed belt. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the tensioning device provided by this utility model;

[0015] Figure 2 This is a schematic diagram of the first winding method of the toothed belt provided by this utility model;

[0016] Figure 3 This is a schematic diagram of the second winding method of the toothed belt provided by this utility model.

[0017] Figure 4This is a half-sectional view of the first pulley provided by this utility model;

[0018] Figure 5 This is a schematic diagram of the double-layer structure of the tensioning device provided by this utility model. Detailed Implementation

[0019] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In addition, to clearly illustrate the technical solution of this application, the following are also defined: Figure 1 The top, bottom, left, right, front, and back sides are shown.

[0021] like Figure 1 As shown, this application provides a toothed belt tensioning device, which includes: a fixing member 1, a first tensioning rod 2, a first wheel frame 3, and a first adjusting frame 6.

[0022] Specifically, the fixing member 1 is used to fix the tensioning device to the outer steel ring 200; the first tensioning rod 2 is installed at the front end of the fixing member 1 and extends in the front-rear direction. The first wheel frame 3 is installed on the first tensioning rod 2 and extends in the left-right direction. The first tensioning wheel 4 is rotatably installed at one end of the top surface of the first wheel frame 3, and the first pulley 5 is rotatably installed at the other end. The first adjusting frame 6 is movably installed on the first tensioning rod 2 in the front-rear direction and is located in front of the first wheel frame 3. The second pulley 7 is rotatably installed on the top surface of the first adjusting frame 6. The first pulley 5 and the second pulley 7 are both toothed pulleys and can mesh with the toothed surface of the toothed belt 100 respectively. The toothed belt 100 is wound around the first tensioning wheel 4, the second pulley 7, the outer speed change plate, and the first pulley 5 in sequence. The movement of the first adjusting frame 6 is used to adjust the tension of the toothed belt 100.

[0023] This device effectively achieves precise adjustment of the toothed belt tension by rationally arranging the first tensioning pulley 4, the first pulley 5, and the second pulley 7, and combining them with the adjustable first adjusting frame 6. Simultaneously, the toothed pulley structure enhances the meshing performance between the toothed belt 100 and the pulley, reducing the risk of slippage and minimizing pulley wear. It is particularly suitable for applications involving frequent equipment start-ups and shutdowns or significant changes in operating conditions.

[0024] More specifically, the bottom of the first adjustment frame 6 is provided with a locking element 61 for fixing the first adjustment frame 6 to the first tensioning rod 2. By setting the locking element 61, the first adjustment frame 6 can be firmly locked after adjustment, preventing loosening under long-term operation or dynamic load, thereby enhancing the stability and reliability of the tensioning structure. At the same time, it also reduces the maintenance needs of frequent manual reset and adjustment, improving the overall ease of use and maintenance efficiency.

[0025] Furthermore, the first adjusting frame 6 is provided with a fine-tuning part 62 for adjusting the distance between the first adjusting frame 6 and the first wheel frame 3, and the fine-tuning part 62 is sleeved on the first tensioning rod 2. Rotating the fine-tuning part 62 can realize high-precision movement adjustment of the position of the first adjusting frame 6 on the first tensioning rod 2, which significantly improves the accuracy and repeatability of the tension control of the toothed belt.

[0026] Furthermore, the fastener 1 is an open clamp structure that snaps onto the surface of the outer steel ring 200, thereby enabling quick assembly and disassembly of the tensioning device and improving construction and maintenance efficiency.

[0027] like Figures 1 to 3 As shown, the left end of the first wheel frame 3 includes a first mounting hole 31 and a second mounting hole 32 from front to back, and the right end includes a third mounting hole 33 and a fourth mounting hole 34 from front to back. When the toothed belt 100 enters the tensioning device from the right side, the first tensioning wheel 4 is installed in the third mounting hole 33, the first pulley 5 is installed in the second mounting hole 32, and the second pulley 7 is basically located to the left of the first tensioning rod 2. When the toothed belt 100 enters the tensioning device from the left side, the first tensioning wheel 4 is installed in the first mounting hole 31, the first pulley 5 is installed in the fourth mounting hole 34, and the second pulley 7 is basically located to the right of the first tensioning rod 2. By setting four mounting holes in different positions and flexibly switching them according to the different entry directions of the toothed belt 100, the device can achieve bidirectional adaptability, significantly improving its versatility in various equipment or transmission layouts. This design can achieve tensioning arrangements under different transmission paths without modifying the core structure, which is beneficial to reducing manufacturing costs and inventory complexity, and enhancing the modularity and standardization of the product. It also improves assembly efficiency and maintenance convenience, making it particularly useful in situations where equipment space is limited or wiring paths change frequently.

[0028] like Figure 4As shown, bearings 8 are respectively installed inside the first pulley 5, the second pulley 7, and the first tensioning pulley 4. A short shaft 9 is vertically positioned in the middle of the bearing 8. The first pulley 5 and the first tensioning pulley 4 are rotatably mounted on the first wheel frame 3 via the bearings 8 and the short shaft 9, respectively. The second pulley 7 is rotatably mounted on the first adjusting frame 6 via the bearings 8 and the short shaft 9. The combination of bearings 8 and short shaft 9 significantly improves the rotational smoothness and wear resistance of the wheel body, maintaining system stability under high-speed, long-term operation conditions. This structure not only reduces the frictional power consumption of the wheel and axle system but also reduces the mechanical failure rate, thereby improving the transmission efficiency and lifespan of the entire tensioning system.

[0029] like Figure 5 As shown, above the first tensioning rod 2, the tensioning device further includes: a second tensioning rod 20 arranged parallel to the first tensioning rod 2; a second wheel frame 30 arranged corresponding to the first wheel frame 3, the second wheel frame 30 being mounted on the second tensioning rod 20; the second wheel frame 30 being provided with a second tensioning wheel 40 corresponding to the first tensioning wheel 4 and a third pulley 50 corresponding to the first pulley 5; a second adjusting frame 60 arranged corresponding to the first adjusting frame 6, the second adjusting frame 60 being mounted on the second tensioning rod 20; the second adjusting frame 60 being provided with... The device includes a fourth pulley 70 corresponding to the second pulley 7; it also includes two connecting rods 91 and a support rod 92. The connecting rods 91 are vertically installed in two slots among the first mounting hole 31, the second mounting hole 32, the third mounting hole 33, and the fourth mounting hole 34, for connecting the first wheel frame 3 and the second wheel frame 30. The support rod 92 is vertically positioned in front of the first tensioning rod 2 and the second tensioning rod 20, with its top connected to the front end of the second tensioning rod 20 and its bottom connected to the front end of the first tensioning rod 2. This configuration allows for simultaneous synchronous transmission and independent tensioning of the two toothed belts 100, greatly improving the functional adaptability of the tensioning device. It is particularly suitable for industrial equipment with master / slave transmission channels or dual output shaft systems. The compact double-layer structure effectively utilizes vertical space, increasing the load-bearing capacity and transmission efficiency of the unit without increasing lateral occupancy.

[0030] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A toothed belt tensioner characterized by, The utility model relates to a kind of tensioning device, including: Fixed part (1), the fixed part (1) is used to be fixed to external steel ring (200) on tensioning device; First tensioning rod (2), the first tensioning rod (2) is installed in the front end of the fixed part (1), extends along front and back direction; First wheel frame (3), the first wheel frame (3) is installed on the first tensioning rod (2), extends along left and right direction;The first wheel frame (3) top surface one end rotationally provided with first tensioning wheel (4), the other end rotationally provided with first pulley (5); First adjustment frame (6), the first adjustment frame (6) is movably provided on the first tensioning rod (2) along front and back direction, and located in the front side of the first wheel frame (3);The first adjustment frame (6) top surface rotationally provided with second pulley (7);The first pulley (5) and the second pulley (7) are all toothed wheels, respectively can be engaged with the tooth surface of the toothed belt (100); The toothed belt (100) is sequentially wound around the first tensioning wheel (4), second pulley (7), external variable speed disc (300) and first pulley (5), and the movement of the first adjustment frame (6) is used to adjust the tensioning degree of the toothed belt (100).

2. A toothed belt tensioner as in claim 1, wherein, The bottom of the first adjustment frame (6) is provided with a locking member (61) for fixing the first adjustment frame (6) to the first tensioning rod (2).

3. The toothed belt tensioner of claim 1 wherein, The first adjustment frame (6) is provided with a fine adjustment part (62) for adjusting the distance between the first adjustment frame (6) and the first wheel frame (3), and the fine adjustment part (62) is sleeved on the first tensioning rod (2).

4. The toothed belt tensioner of claim 1 wherein, The fixed part (1) is an open type clamp structure and is clamped on the surface of the external steel ring (200).

5. The toothed belt tensioner of claim 1 wherein, The first pulley (5), the second pulley (7) and the first tensioning wheel (4) are respectively provided with bearings (8) inside, and the bearings (8) are provided with short shafts (9) in the middle in the vertical direction;The first pulley (5) and the first tensioning wheel (4) are respectively rotationally provided on the first wheel frame (3) through the bearings (8) and the short shafts (9), and the second pulley (7) is rotationally provided on the first adjustment frame (6) through the bearings (8) and the short shafts (9).

6. The toothed belt tensioner of claim 1 wherein, The left end of the first wheel frame (3) includes a first mounting hole (31) and a second mounting hole (32) from front to back, and the right end includes a third mounting hole (33) and a fourth mounting hole (34) from front to back;When the toothed belt (100) enters the tensioning device from the right side, the first tensioning wheel (4) is installed in the third mounting hole (33), the first pulley (5) is installed in the second mounting hole (32), and the second pulley (7) is basically located on the left side of the first tensioning rod (2);When the toothed belt (100) enters the tensioning device from the left side, the first tensioning wheel (4) is installed in the first mounting hole (31), the first pulley (5) is installed in the fourth mounting hole (34), and the second pulley (7) is basically located on the right side of the first tensioning rod (2).

7. A toothed belt tensioner as in claim 6, wherein, Above the first tensioning rod (2), the tensioning device further includes: A second tensioning rod (20) is arranged in parallel with the first tensioning rod (2); A second wheel frame (30) is arranged corresponding to the first wheel frame (3), and the second wheel frame (30) is arranged on the second tensioning rod (20); the second wheel frame (30) is provided with a second tensioning wheel (40) corresponding to the first tensioning wheel (4) and a third pulley (50) corresponding to the first pulley (5); A second adjusting frame (60) is arranged corresponding to the first adjusting frame (6), and the second adjusting frame (60) is arranged on the second tensioning rod (20); the second adjusting frame (60) is provided with a fourth pulley (70) corresponding to the second pulley (7); Two connecting rods (91) are arranged in two empty positions in the vertical direction among the first mounting hole (31), the second mounting hole (32), the third mounting hole (33) and the fourth mounting hole (34), and are used for connecting the first wheel frame (3) and the second wheel frame (30); A support rod (92) is arranged on the front side of the first tensioning rod (2) and the second tensioning rod (20) in the vertical direction, the top of the support rod (92) is connected with the front end of the second tensioning rod (20), and the bottom is connected with the front end of the first tensioning rod (2).

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