Cvt mute chain gearbox

Abstract

The utility model belongs to the technical field of gearboxes, and particularly relates to a cvt mute chain gearbox which comprises a bearing box, a main cylinder and an auxiliary cylinder, a steel chain is arranged on the main cylinder, a containing box is installed on the outer wall of the bearing box, an exhaust fan is fixedly installed in the containing box, an air conveying pipe is installed at the output end of the exhaust fan, and the air conveying pipe is connected with the main cylinder. A plurality of branch air pipes are installed on the inner wall of the bearing box in a surrounding mode, a plurality of air outlets are formed in the branch air pipes, a circulating cooling assembly is arranged in the containing box, and an exhaust fan extracts cold air through the circulating cooling assembly. The operation stability of the gearbox can be kept by installing the exhaust fan, the exhaust fan is firstly started to work, wind power extracted by the exhaust fan is conveyed to the branch air pipes through the air conveying pipes and then blown out from the air outlets in the branch air pipes, cooling of the main cylinder, the auxiliary cylinder and the steel chain is achieved, the internal environment of the gearbox is effectively regulated and controlled, and the service life of the gearbox is prolonged. And the performance and the service life of the cvt mute chain gearbox are further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gearbox technical field, concretely is a cvt mute chain gearbox. BACKGROUND

[0002] The development of CVT (Continuously Variable Transmission) technology can be traced back to the early 20th century. The initial CVT design uses rubber belts or chains to achieve continuously variable transmission. Although these early designs can achieve the function of continuously variable transmission, they have limitations in torque transmission capacity and durability. With the advancement of technology, steel belts and steel chains have been gradually introduced into CVT design to improve the torque transmission capacity and durability of the gearbox. CVT mute chains usually use special chain structure and materials to reduce noise and vibration during transmission.

[0003] Patent document CN221443247U discloses a cvt mute chain gearbox, which "includes a planetary gear mechanism, and further includes a driving cone and a driven cone. The driving cone includes a driving cone shaft, and a first fixing member is fixedly connected to one side of the outer side of the driving cone shaft. A driving cone fixed disc is movably connected to the middle part of the outer side of the driving cone shaft. A planetary gear set connecting gear is fixedly connected to the other side of the outer side of the driving cone shaft. A driving variable wheel is movably connected to one side of the outer side of the driving cone fixed disc. A driving cone piston is movably connected to one side of the inside of the driving variable wheel. The utility model moves the driving variable wheel to the taper surface direction of the driving cone fixed disc, and simultaneously moves the driven variable wheel to the taper surface direction of the driven cone fixed disc. The driving variable wheel and the driven variable wheel move synchronously, change the transmission ratio, and control the clamping force of the transmission chain. This is beneficial to reducing the change of clamping force and affecting the transmission efficiency." However, the cvt mute chain gearbox disclosed in the above document mainly considers moving the driving variable wheel to the taper surface direction of the driving cone fixed disc, and simultaneously moving the driven variable wheel to the taper surface direction of the driven cone fixed disc. The driving variable wheel and the driven variable wheel move synchronously, change the transmission ratio, and control the clamping force of the transmission chain. This is beneficial to reducing the change of clamping force and affecting the transmission efficiency. However, it does not consider that the cvt mute chain gearbox needs to continuously perform power transmission and gear shifting operation due to the main cylinder, auxiliary cylinder and steel chain during long-term operation. The friction between these parts generates a large amount of heat, and long-term high-temperature operation accelerates the wear of internal parts of the gearbox, thereby shortening the service life of the gearbox. Therefore, it is necessary to develop a cvt mute chain gearbox to improve the performance and service life of the cvt mute chain gearbox. SUMMARY

[0004] The utility model discloses a cvt mute chain gearbox, and solves the technical problem of temperature rise of the cvt mute chain gearbox due to the power transmission and gear shifting operation of the main cylinder, auxiliary cylinder and steel chain and the like during long time work.

[0005] To realize the above object, the utility model provides the following technical scheme: a cvt mute chain gearbox, including bearing box, main cylinder and auxiliary cylinder, and the main cylinder and auxiliary cylinder are installed in bearing box, be provided with steel chain on the main cylinder, and the main cylinder and auxiliary cylinder are connected through the steel chain, the outer wall of bearing box is fixedly installed with receiving box, the receiving box is fixedly installed with exhaust fan, the output of exhaust fan is fixedly installed with the air delivery pipe, the inner wall of bearing box is installed with multiple branch air pipes, and the output of air delivery pipe is connected with the input of branch air pipe, a plurality of air outlets are arranged on the branch air pipe, the receiving box is provided with circulating cold assembly, and the exhaust fan extracts cold air through the circulating cold assembly.

[0006] Preferably, the circulating cold assembly includes a serpentine tube, a circulating water pump, a cooling pipe, and a heat sink. The serpentine tube is installed in the receiving box, and cooling liquid circulates in the serpentine tube. The circulating water pump is fixedly installed on the outer wall of the receiving box, and one end of the serpentine tube is connected to the input of the circulating water pump. The cooling pipe is fixedly installed on the output of the circulating water pump, and the other end of the cooling pipe is connected to the other end of the serpentine tube. The heat sink is fixedly installed on the top end of the receiving box, and one end of the cooling pipe extends through the heat sink.

[0007] Preferably, the serpentine tube is installed in front of the exhaust fan, and the wind power extracted by the exhaust fan passes through the serpentine tube to keep the wind power cool.

[0008] Preferably, the heat sink is provided with a slot in the middle part, and one end of the cooling pipe extends into the heat sink through the slot and is connected to the serpentine tube.

[0009] Preferably, the receiving box is provided with a first filter screen, and the first filter screen is located in front of the serpentine tube.

[0010] Preferably, the bearing box is provided with a second filter screen, and the second filter screen is used to circulate the hot air in the bearing box to the outside.

[0011] Compared with the prior art, the utility model has the beneficial effects that:

[0012] 1.The utility model discloses a through the installation of the exhaust fan can keep the stability of operation of gearbox, first start the work of exhaust fan, and the wind power of extraction of exhaust fan is transported to the branch air pipe of intercommunication with it through the air pipe, then the wind power of extraction is blown out from a plurality of air outlets on the branch air pipe, and the wind power blown out from the air outlet can realize the cooling of main cylinder, auxiliary cylinder and steel chain, and the hot air flowing in the bearing box can be discharged from the bearing box through the second filter screen, the internal temperature of bearing box is kept through the exhaust fan, the internal environment of gearbox is regulated and controlled effectively, and the performance and service life of cvt mute chain gearbox are further improved.

[0013] 2.The utility model discloses a through the installation of the fin to keep the cool degree of wind power of extraction of exhaust fan, first start the circulating water pump, and the circulating water pump can extract the cooling liquid in the serpentine pipe to flow to the cooling pipe, and the cooling liquid in the cooling pipe can complete the heat dissipation of cooling liquid through the contact with the fin, and the cooling liquid after heat dissipation can be recycled to the serpentine pipe to exchange heat to the wind of extraction of exhaust fan, make the wind cool, and the heat on the fin can be radiated to the outside through heat conduction. ACCURACY

[0014] Figure 1 It is the whole structure schematic diagram of the utility model;

[0015] Figure 2 It is the explosion structure schematic diagram of the utility model;

[0016] Figure 3 It is Figure 1 The enlarged schematic diagram of structure A;

[0017] Figure 4 It is Figure 2 The enlarged schematic diagram of structure B.

[0018] In the drawing: 1, bearing box;2, main cylinder;3, auxiliary cylinder;4, steel chain;5, storage box;6, exhaust fan;7, air pipe;8, branch air pipe;9, air outlet;10, serpentine pipe;11, circulating water pump;12, cooling pipe;13, fin;14, slot;15, first filter screen;16, second filter screen. CONCRETE IMPLEMENTING METHOD

[0019] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without creative labor belong to the scope of protection of the utility model.

[0020] Please refer to Figure 1 - Figure 4The utility model provides a kind of cvt mute chain gearbox, including bearing box 1, main cylinder 2 and auxiliary cylinder 3, and main cylinder 2 and auxiliary cylinder 3 are installed in bearing box 1, steel chain 4 is provided on main cylinder 2, and main cylinder 2 and auxiliary cylinder 3 are connected by steel chain 4, the outer wall of bearing box 1 is fixedly installed with receiving box 5, receiving box 5 is fixedly installed with exhaust fan 6 in, the output of exhaust fan 6 is fixedly installed with wind pipe 7, the inner wall of bearing box 1 is installed with multiple branch air pipes 8, and the output of wind pipe 7 is connected with the input of branch air pipe 8, branch air pipe 8 is provided with several air outlets 9, receiving box 5 is provided with circulating cold assembly, exhaust fan 6 extracts cold air by circulating cold assembly, when cvt mute chain gearbox works, first main cylinder 2 and auxiliary cylinder 3 have movable disc and fixed disc respectively, form V-shaped groove, with the side contact of steel chain 4, through oil pressure control movable disc axial movement of main cylinder 2 and auxiliary cylinder 3, to change the contact radius of steel chain 4 and pulley, realize stepless speed change, simultaneously, steel chain 4 is composed of multiple chain pieces and transmission pin, with higher tensile strength and transmission efficiency, power is transmitted by the tension of steel chain 4, in transmission process, the friction between steel chain 4 and pulley ensures the effective transmission of power, but cvt mute chain gearbox in long time work, because main cylinder 2, auxiliary cylinder 3 and steel chain 4 etc. component needs constantly power transmission and gear shifting operation, and the friction between these components generates a lot of heat, and long time high temperature operation can accelerate the wear and tear of internal parts of gearbox, to cause the service life of gearbox shortening problem, when maintaining the stability of gearbox operation, by installing exhaust fan 6, the stability of gearbox operation can be maintained, first, start exhaust fan 6 work, the wind power extracted by exhaust fan 6 is sent to branch air pipe 8 connected with it by wind pipe 7, then is blown out from several air outlets 9 on branch air pipe 8, the wind power blown out from air outlet 9 can realize the cooling of main cylinder 2, auxiliary cylinder 3 and steel chain 4, and hot air flowing in bearing box 1 is discharged from bearing box 1 by No.

[0021] Please see Figure 2 Figure 4 ​, circulating cold assembly includes serpentine pipe 10, circulating water pump 11, cooling pipe 12 and fin 13, serpentine pipe 10 is installed in the storage box 5, and the serpentine pipe 10 circulates the cooling liquid, circulating water pump 11 is fixedly installed on the outer wall of the storage box 5, and one end of the serpentine pipe 10 is communicated with the input end of the circulating water pump 11, the cooling pipe 12 is fixedly installed on the output end of the circulating water pump 11, and the output end of the cooling pipe 12 is communicated with the other end of the serpentine pipe 10, the fin 13 is fixedly installed on the top end of the storage box 5, and one end of the cooling pipe 12 penetrates into the fin 13, the serpentine pipe 10 is installed in front of the exhaust fan 6, the wind power extracted by the exhaust fan 6 passes through the serpentine pipe 10 to keep the wind power cool, when keeping the cool degree of the wind power extracted by the exhaust fan 6, first start the circulating water pump 11, the circulating water pump 11 will extract the cooling liquid in the serpentine pipe 10 to flow into the cooling pipe 12, and the cooling liquid in the cooling pipe 12 will complete the heat dissipation of the cooling liquid by contacting with the fin 13, the cooled cooling liquid will be recycled back to the serpentine pipe 10 to exchange heat with the wind extracted by the exhaust fan 6, so that the wind becomes cool, and the heat on the fin 13 is dissipated to the outside through heat conduction.

[0022] Please refer to Figure 4 , the middle part of the fin 13 is provided with a slot 14, and one end of the cooling pipe 12 extends into the fin 13 through the slot 14 and is connected with the serpentine pipe 10, when the cooling liquid flows into the cooling pipe 12, the cooling liquid will contact with the fin 13, so that the heat in the cooling liquid is transferred to the fin 13, and then is conducted to the outside environment through the fin 13.

[0023] Please refer to Figure 1 And Figure 2 , the storage box 5 is provided with a filter screen 15, and the filter screen 15 is located in front of the serpentine pipe 10, the bearing box 1 is provided with a second filter screen 16, and the second filter screen 16 is used for making the hot air in the bearing box 1 flow to the outside, the first filter screen 15 blocks the dust and other impurities in the air from entering the storage box 5 by physical blocking, and the second filter screen 16 allows the air in the bearing box 1 to flow out, while preventing the outside large particles from entering.

[0024] The working principle is that the stability of the gearbox operation is maintained by installing the air extractor 6. First, the air extractor 6 is started to work. The air extracted by the air extractor 6 is transported to the branch air pipe 8 connected thereto through the air conveying pipe 7, and then is blown out from the air outlets 9 on the branch air pipe 8. The air blown out from the air outlets 9 can realize the temperature reduction of the main cylinder 2, the auxiliary cylinder 3 and the steel chain 4. The hot air flowing in the bearing box 1 is discharged from the bearing box 1 through the second filter screen 16. The internal temperature of the bearing box 1 is maintained by the air extractor 6, the internal environment of the gearbox is effectively regulated and controlled, and the performance and service life of the cvt silent chain gearbox are further improved. First, the circulating water pump 11 is started. The circulating water pump 11 can extract the cooling liquid in the serpentine pipe 10 to flow into the cooling pipe 12. The cooling liquid in the cooling pipe 12 can complete the heat dissipation of the cooling liquid by contacting the radiating fin 13. The cooled cooling liquid is recycled back to the serpentine pipe 10 to exchange heat with the air extracted by the air extractor 6, so that the air is cooled. The heat on the radiating fin 13 is dissipated to the outside through heat conduction.

[0025] It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A cvt silent chain transmission comprising a carrier case (1), a main cylinder (2) and a sub cylinder (3), and the main cylinder (2) and the sub cylinder (3) are both installed in the carrier case (1), characterized in that: The main cylinder (2) is provided with a steel chain (4), and the main cylinder (2) and the auxiliary cylinder (3) are connected through the steel chain (4), the outer wall of the bearing box (1) is fixedly installed with a storage box (5), the storage box (5) is fixedly installed with an air extractor (6), the output end of the air extractor (6) is fixedly installed with a wind pipe (7), the inner wall of the bearing box (1) is installed with a plurality of branch wind pipes (8), and the output end of the wind pipe (7) is connected with the input end of the branch wind pipe (8).

2. A CVT silent chain transmission according to claim 1, characterized in that: The circulating cooling assembly comprises a serpentine pipe (10), a circulating water pump (11), a cooling pipe (12) and a heat sink (13), the serpentine pipe (10) is installed in the storage box (5), and cooling liquid circulates in the serpentine pipe (10); the circulating water pump (11) is fixedly installed on the outer wall of the storage box (5), and one end of the serpentine pipe (10) is connected with the input end of the circulating water pump (11); the cooling pipe (12) is fixedly installed on the output end of the circulating water pump (11), and the other end of the cooling pipe (12) is connected with the other end of the serpentine pipe (10); and the heat sink (13) is fixedly installed on the top end of the storage box (5), and one end of the cooling pipe (12) extends into the heat sink (13) through the slot (14).

3. A CVT silent chain transmission according to claim 2, characterised in that: The serpentine pipe (10) is installed in front of the air extractor (6), and the wind power extracted by the air extractor (6) passes through the serpentine pipe (10) to keep the wind power cool.

4. A CVT silent chain transmission according to claim 2, characterised in that: The middle part of the heat sink (13) is provided with a slot (14), and one end of the cooling pipe (12) extends into the heat sink (13) through the slot (14) and is connected with the serpentine pipe (10).

5. A CVT silent chain transmission according to claim 1, characterized in that: The storage box (5) is provided with a filter screen (15), and the filter screen (15) is located in front of the serpentine pipe (10).

6. A CVT silent chain transmission according to claim 1, characterized in that: The bearing box (1) is provided with a second filter screen (16), and the second filter screen (16) is used for making hot air in the bearing box (1) flow to the outside.

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