Chain wheel type tensioning device

Abstract

The utility model discloses a chain wheel type tensioning device which comprises a motor, a fan, a tensioning chain wheel and a shell, the motor is in driving connection with a driving chain wheel, the fan is in driving connection with a driven chain wheel, a chain is connected between the driving chain wheel and the driven chain wheel, and the tensioning chain wheel is arranged below the chain. The driving chain wheel, the driven chain wheel, the chain and the tensioning chain wheel are located in the shell. According to the chain tensioning device, the chain can be effectively tensioned, and meanwhile the influence of external impurities can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tensioning equipment, and more specifically, to a sprocket type tensioning device. Background Art

[0002] The motor and the fan are connected through a driving sprocket, a driven sprocket and a chain. When the motor drives the fan to run, the chain will also rotate. After a long time, the chain will produce teeth slippage, rust, vibration and other phenomena, so there is an urgent need for a device that can solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a sprocket type tensioning device.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model discloses a sprocket type tensioning device, comprising a motor, a fan, a tensioning sprocket and a shell, wherein the motor is driven and connected to a driving sprocket, the fan is driven and connected to a driven sprocket, a chain is connected between the driving sprocket and the driven sprocket, the tensioning sprocket is arranged below the chain, the driving sprocket, the driven sprocket, the chain and the tensioning sprocket are located in the shell, the shell comprises an oil storage shell, the tensioning sprocket is rotatably arranged in the oil storage shell, an electric push rod is arranged below the oil storage shell, and the electric push rod can drive the oil storage shell to rise and fall.

[0006] Furthermore, the outer shell includes an upper shell and a lower shell, the lower shell includes an oil guide shell, the lower end of the oil guide shell is connected to the upper end of the oil storage shell, and the oil guide shell is made of rubber.

[0007] Furthermore, the bottom of the oil guide shell is tilted, and the height of one end of the oil guide shell connected to the oil storage shell is lower than the height of one end of the oil guide shell away from the oil storage shell.

[0008] Furthermore, a Hall speed sensor is arranged on the inner side of the oil storage shell, and a magnet is installed on the tensioning sprocket.

[0009] Furthermore, a displacement sensor is arranged on the side of the electric push rod, a mounting plate is connected to the side of the oil storage shell, a pull rope is connected to the displacement sensor, and the other end of the pull rope is connected to the lower end of the mounting plate.

[0010] Furthermore, the tensioning sprocket includes a fixed shaft, a stator, and a rotor. The fixed shaft is fixedly installed in the oil storage shell, the stator is fixedly installed on the fixed shaft, a bearing is arranged on the stator, and the rotor is installed on the bearing.

[0011] The beneficial effect of the utility model is that the chain can be kept in a tensioned state by driving the tensioning sprocket to move upward to support the chain, so that the chain can operate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of the sprocket type tensioning device in this embodiment;

[0013] Figure 2 is a cross-sectional view of the sprocket type tensioning device in this embodiment;

[0014] Figure 3 This is a top view of the oil storage shell in this embodiment;

[0015] Figure 4 Schematic diagram of the installation of the oil storage shell in this embodiment.

[0016] Figure numerals: 1, base plate; 2, bracket one; 3, motor; 4, bracket two; 5, fan; 6, driving sprocket; 7, driven sprocket; 8, chain; 9, outer shell; 10, oil storage shell; 11, electric push rod; 12, tensioning sprocket; 13, upper shell; 14, lower shell; 15, oil guide shell; 16, fixing plate; 17, displacement sensor; 18, pull rope; 19, mounting plate; 20, Hall speed sensor; 21, magnet; 22, fixed shaft; 23, stator; 24, bearing; 25, rotor. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] As attached Figure 1 -Attached Figure 4 As shown, a sprocket type tensioning device includes a base plate 1, a bracket 2 and a bracket 4 are connected to the upper part of the base plate 1, a motor 3 is installed on the upper part of the bracket 2, the motor 3 is driven and connected to a driving sprocket 6, a fan 5 is installed on the upper part of the bracket 24, the fan 5 is driven and connected to a driven sprocket 7, a chain 8 is connected between the driving sprocket 6 and the driven sprocket 7, a tensioning sprocket 12 is arranged below the chain 8, the driving sprocket 6, the driven sprocket 7, the chain 8 and the tensioning sprocket 12 are located in an outer shell 9, the outer shell 9 includes an oil storage shell 10, the tensioning sprocket 12 is rotatably arranged in the oil storage shell 10, and an electric push rod 11 is arranged below the oil storage shell 10, and the electric push rod 11 can drive the oil storage shell 10 to rise and fall.

[0019] The motor 3 drives the driving sprocket 6 to rotate, and the driving sprocket 6 drives the driven sprocket 7 to rotate through the chain 8, thereby driving the fan 5 to operate. The tensioning sprocket 12 is pressed against the chain 8, so that the chain 8 is in a tensioned state. The electric push rod 11 drives the oil storage shell 10 to rise, thereby driving the tensioning sprocket 12 to move upward, so that the chain 8 always remains in a tensioned state.

[0020] The housing 9 can play a certain insulating role, preventing external impurities from contaminating the lubricating oil and then affecting the operation of the driving sprocket 6 , the driven sprocket 7 , the tensioning sprocket 12 , and the chain 8 .

[0021] The housing 9 includes an upper shell 13 and a lower shell 14 . Both ends of the upper shell 13 and the lower shell 14 are connected with a fixing plate 16 . Bolts are arranged on the fixing plate 16 , and the upper shell 13 and the lower shell 14 are fixedly installed by the bolts.

[0022] like Figure 2 As shown, the lower housing 14 includes an oil guide shell 15, the lower end of which is connected to the upper end of the oil storage shell 10, so that there is no gap between the oil guide shell 15 and the oil storage shell 10. The oil guide shell 15 is made of rubber, and during the rising process of the oil storage shell 10, the oil guide shell 15 can produce a certain deformation, and the part of the oil guide shell 15 connected to the oil storage shell 10 can rise together with the oil storage shell 10 to maintain sealing.

[0023] The bottom of the oil guide housing 15 is inclined, and the height of the end of the oil guide housing 15 connected to the oil storage housing 10 is lower than the height of the end of the oil guide housing 15 away from the oil storage housing 10. Lubricating oil is added to the oil storage housing 10, and the lubricating oil is transferred to the chain 8 as the tensioning sprocket 12 rotates, which can continuously lubricate the chain 8. After the lubricating oil on the chain 8 drips, it can flow down along the inclined bottom of the oil guide housing 15, return to the oil storage housing 10, and be collected and used again.

[0024] like Figure 3 As shown, a Hall speed sensor 20 is arranged inside the oil storage shell 10, and a magnet 21 is installed on the tensioning sprocket 12. When the tensioning sprocket 12 rotates, the magnet 21 is driven to rotate synchronously, and the Hall speed sensor 20 obtains the speed of the tensioning sprocket 12 by detecting the magnet 21. When the detected speed value fluctuates greatly, that is, the chain 8 has slipped teeth, loosened, etc., at this time, the chain needs to be tensioned, and the electric push rod 11 runs to push the oil storage shell 10 upward, and the tensioning sprocket 12 will follow upward, that is, tensioning can be achieved.

[0025] like Figure 4As shown, a displacement sensor 17 is provided on the side of the electric push rod 11, a mounting plate 19 is connected to the side of the oil storage shell 10, a pull rope 18 is connected to the displacement sensor 17, and the other end of the pull rope 18 is connected to the lower end of the mounting plate 19. The displacement of the pull rope 18 is detected by the displacement sensor 17, so as to obtain the movement amount of the oil storage shell 10, limit the displacement amount of the oil storage shell 10, and prevent the oil storage shell 10 from rising too much so that the tension sprocket 12 affects the normal rotation of the chain 8.

[0026] like Figure 3 As shown, the tensioning sprocket 12 includes a fixed shaft 22, a stator 23, and a rotor 25. The fixed shaft 22 is fixedly installed in the oil storage shell 10, the stator 23 is fixedly installed on the fixed shaft 22, a bearing 24 is provided on the stator 23, and the rotor 25 is installed on the bearing 24. The inner ring of the bearing 24 is installed on the stator 23, and the rotor 25 is installed on the outer ring of the bearing 24. When the tensioning sprocket 12 rotates, specifically, the rotor 25 rotates on the stator 23, and the stator 23 is fixed. When the rotor 25 rotates around the stator 23, an induced electromotive force is generated on the stator 23, which is connected with the external circuit to form a closed circuit, and current is output to the load. The power output can power the Hall speed sensor 20 to ensure reliable and stable operation of the equipment.

[0027] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A sprocket type tensioning device, characterized in that: The invention comprises an electric motor (3), a fan (5), a tensioning sprocket (12) and a housing (9); the electric motor (3) is drivingly connected to a driving sprocket (6); the fan (5) is drivingly connected to a driven sprocket (7); a chain (8) is connected between the driving sprocket (6) and the driven sprocket (7); the tensioning sprocket (12) is arranged below the chain (8); the driving sprocket (6), the driven sprocket (7), the chain (8) and the tensioning sprocket (12) are located inside the housing (9); the housing (9) comprises an oil storage shell (10); the tensioning sprocket (12) is rotatably arranged inside the oil storage shell (10); an electric push rod (11) is arranged below the oil storage shell (10); the electric push rod (11) can drive the oil storage shell (10) to rise and fall.

2. A sprocket type tensioning device according to claim 1, characterized in that: The housing (9) comprises an upper housing (13) and a lower housing (14), wherein the lower housing (14) comprises an oil guide housing (15), wherein the lower end of the oil guide housing (15) is connected to the upper end of the oil storage housing (10), and the oil guide housing (15) is made of rubber.

3. A sprocket type tensioning device according to claim 2, characterized in that: The bottom of the oil guide housing (15) is arranged tilted, and the height of the end of the oil guide housing (15) connected to the oil storage housing (10) is lower than the height of the end of the oil guide housing (15) away from the oil storage housing (10).

4. A sprocket type tensioning device according to claim 1, characterized in that: A Hall speed sensor (20) is arranged inside the oil storage shell (10), and a magnet (21) is installed on the tensioning sprocket (12).

5. A sprocket type tensioning device according to claim 1, characterized in that: A displacement sensor (17) is arranged on the side of the electric push rod (11), a mounting plate (19) is connected to the side of the oil storage shell (10), a pull rope (18) is connected to the displacement sensor (17), and the other end of the pull rope (18) is connected to the lower end of the mounting plate (19).

6. A sprocket type tensioning device according to claim 4, characterized in that: The tensioning sprocket comprises a fixed shaft, a stator and a rotor. The fixed shaft is fixedly installed in the oil storage shell, the stator is fixedly installed on the fixed shaft, a bearing is arranged on the stator, and the rotor is installed on the bearing.

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