CVT gearbox

Abstract

The utility model discloses a CVT (continuously variable transmission) gearbox, which relates to the technical field of gearboxes and comprises a case, a first transmission wheel set is rotatably connected to one side of the interior of the case, and a second transmission wheel set is rotatably connected to the other side of the interior of the case. By the adoption of the structure, friction elements in the CVT gearbox can be guaranteed to be fully lubricated due to the automatic lubricating function of the gearbox, the requirement for manual lubrication is reduced, and therefore maintenance cost is reduced, normal work of parts in the CVT gearbox can be guaranteed due to the good automatic lubricating system, friction and abrasion are reduced, and the service life of the CVT gearbox is prolonged. According to the CVT gearbox, the self-lubricating function is achieved, so that the service life of parts is prolonged, it can be guaranteed that the CVT gearbox can keep a good lubricating state under various working conditions through the self-lubricating function, the reliability and stability of a system are improved, energy loss can be reduced through good lubrication, the transmission efficiency is improved, and therefore the CVT gearbox has better performance and fuel economy.

Description

Technical Field

[0001] The utility model belongs to the technical field of gearboxes, in particular to a CVT gearbox. Background Art

[0002] CVT transmission is a continuously variable transmission. It uses a different working principle from traditional transmissions and achieves continuously variable speed by adjusting the transmission ratio. CVT transmission can provide smoother acceleration and higher fuel efficiency because it can continuously adjust the transmission ratio while the vehicle is running, so that the engine is always in the best working condition. CVT transmission has been widely used in models of some car brands, especially in hybrid models.

[0003] At present, the common automatic transmissions for cars are CVT, AT and dual-clutch mainstream transmissions. CVT transmissions have smooth shifting, but the transmission torque is small; AT transmissions have large torque transmissions, but low transmission efficiency, high fuel consumption, and high manufacturing costs. When shifting, the power will be interrupted and the shifting time is long, resulting in obvious jerking. When shifting at low speeds, the mainstream dual-clutch transmission has obvious jerking, poor comfort, and poor fuel economy.

[0004] The Chinese patent with publication number "CN109372962A" discloses a CVT automatic transmission with gears, which includes shaft A, a gear mechanism A, a transmission belt, shaft B, a gear mechanism B, a gear mechanism C, and a gear mechanism D. One end of the transmission belt is sleeved on the V-shaped groove surface formed by the gear mechanism A and the gear mechanism D installed on the shaft A, and the gear mechanism B and the gear mechanism C at the other end of the transmission belt are installed on the V-shaped groove surface formed by the shaft B. The grooves uniformly opened on the inner surface of the ring of the transmission belt are connected with several semi-circular platforms A and semi-circular platforms B on the shaft A and shaft B. The gear pins A fixed on the nail plate A and the gear pins B fixed on the nail plate B are inserted into the corresponding holes on the conical plate. The present invention has the advantages of smooth gear shifting without frustration, high comfort and large torque.

[0005] Although the above-mentioned gearbox has the characteristics of smooth gear shifting without frustration, high comfort and large torque during use, it lacks a corresponding heat dissipation structure inside. Since the working principle of the CVT gearbox is different from that of the traditional automatic gearbox, it requires more friction elements to achieve stepless speed change. These friction elements will generate more heat, and the CVT gearbox usually does not have sufficient heat dissipation structure to effectively dissipate the heat, which may cause the gearbox to overheat, thereby affecting its performance and life. In addition, due to the working principle of the CVT gearbox, it requires higher lubrication requirements to ensure the normal operation of the friction elements and reduce wear. However, the existing CVT gearbox design does not have sufficient lubrication structure, and manual lubrication is often used during lubrication. There are certain deficiencies in lubrication and heat dissipation during the overall use, which need to be improved. Utility Model Content

[0006] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a CVT gearbox to solve the problems raised in the background technology.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] A CVT gearbox comprises a chassis, wherein a first transmission wheel set is rotatably connected to one side of the chassis, and a second transmission wheel set is rotatably connected to the other side of the chassis, the first transmission wheel set and the second transmission wheel set are connected by a transmission belt, a connecting shaft is fixedly installed on one side of the first transmission wheel set and the second transmission wheel set, and the outer ends of the connecting shafts pass through the chassis, a lubrication device is fixedly installed on the top of the chassis, and heat dissipation devices are fixedly installed on both sides of the lubrication device;

[0009] The lubricating device comprises a lubricating oil tank, a refueling pipe is fixedly installed on one side of the top of the lubricating oil tank, a sealing cap is threadedly connected to the top of the refueling pipe, two sets of solenoid valves are fixedly installed on both sides of the lubricating oil tank, the inner end of the solenoid valve is connected to the bottom of the lubricating oil tank, and the outer end of the solenoid valve is fixedly installed with a lubricating mechanism. By setting up the lubricating device, lubricating oil can be assisted in filling through the refueling pipe during use, and the sealing cap is twisted to close the interior of the lubricating oil tank after the lubricating oil is filled. During use, lubrication is assisted by the lubricating mechanism at the bottom of the lubricating oil tank, and a heat dissipation device is set up during lubrication to assist in heat dissipation, so that the equipment has better heat dissipation and lubrication effects.

[0010] As an optimal technical solution, a mounting plate is fixedly installed on one side of the chassis, and mounting holes are opened at the four corners of the mounting plate. The mounting holes are set as countersunk holes. The mounting holes on the mounting plate are set to facilitate quick installation of the chassis.

[0011] As a preferred technical solution, a liquid level sensor is fixedly installed on one side of the top of the lubricating oil tank, and the detection end of the liquid level sensor is arranged inside the lubricating oil tank. The liquid level sensor is arranged to facilitate the detection of the internal lubricating oil level of the lubricating oil tank.

[0012] As an optimal technical solution, the lubrication mechanism includes an oil guide pipe, which is fixedly installed on the outer end of the solenoid valve, and a sliding sleeve is fixedly installed on the outer end of the oil guide pipe. The inner side of the sliding sleeve is slidably connected with a sliding pipe, and a buffer spring is fixedly installed on one end of the sliding pipe close to the sliding sleeve, and the other end of the buffer spring is fixedly connected to the inside of the sliding sleeve. A conical head is fixedly installed on the outer end of the sliding pipe, and an oil-coated ball is rotatably connected to the outer end of the conical head. The inner sides of the oil-coated balls are respectively fitted and connected to the outer surfaces of the first transmission wheel group and the second transmission wheel group. A lubrication mechanism is provided, which can assist in guiding oil through the oil guide pipe during use. At this time, the oil passes through the oil-coated balls at the bottom conical head for rolling and oiling, and can be automatically lubricated as the first transmission wheel group and the second transmission wheel group rotate.

[0013] As an optimal technical solution, the upper and lower ends of the outer side of the heat dissipation cover are provided with heat dissipation grooves, and the inner side of the heat dissipation grooves is connected to the interior of the chassis. The heat dissipation grooves can assist in increasing the air circulation rate and improving the heat dissipation effect.

[0014] As a preferred technical solution, the heat dissipation device includes a heat dissipation hood, and the overall cross-sectional shape of the heat dissipation hood is an isosceles trapezoid. A mounting groove is opened in the middle of the outer side of the heat dissipation hood, and a partition frame is fixedly installed on the inner side of the mounting groove. The partition frame in the mounting groove is rotatably connected to a heat dissipation fan on one side close to the first transmission wheel group and the second transmission wheel group. The heat dissipation device can increase the air circulation rate by starting the heat dissipation fan, thereby improving the overall heat dissipation effect of the equipment.

[0015] As an optimal technical solution, a dustproof net is also fixedly installed on the inner side of the heat dissipation groove, and a dustproof net is also fixedly installed on the outer end of the partition frame. The dustproof net can assist in dust prevention and prevent dust from entering the interior of the chassis.

[0016] In summary, the utility model mainly has the following beneficial effects:

[0017] First, the automatic lubrication function of this gearbox can ensure that the friction elements inside the CVT gearbox are fully lubricated, reducing the need for manual lubrication, thereby reducing maintenance costs. A good automatic lubrication system can ensure the normal operation of the internal parts of the CVT gearbox, reduce friction and wear, and thus extend the service life of the parts. The automatic lubrication function can ensure that the CVT gearbox can maintain a good lubrication state under various working conditions, thereby improving the reliability and stability of the system. Good lubrication can reduce energy loss and improve transmission efficiency, so that the CVT gearbox has better performance and fuel economy;

[0018] Second, this gearbox has a good heat dissipation function to ensure that the CVT gearbox can effectively dissipate the heat generated during operation to avoid overheating, thereby improving the reliability and stability of the system. Effective heat dissipation can reduce the temperature of the internal components of the CVT gearbox, slow down the aging of the components, and extend the service life of the components. Through effective heat dissipation, the CVT gearbox can be maintained at a lower operating temperature, reduce friction loss, and improve transmission efficiency, so that the car has better performance and fuel economy. Good heat dissipation function can reduce the failure of the CVT gearbox due to overheating and reduce maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0021] Figure 3 It is a rear view structural schematic diagram of the utility model;

[0022] Figure 4 It is a rear view schematic diagram of the internal structure of the utility model;

[0023] Figure 5 It is a schematic diagram of the structure of the heat dissipation device of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the lubrication mechanism of the utility model.

[0025] Figure numerals: 1. chassis; 2. first transmission wheel group; 3. second transmission wheel group; 4. transmission belt; 5. connecting shaft; 6. lubrication device; 61. lubricating oil tank; 62. refueling pipe; 63. sealing cover; 64. solenoid valve; 65. lubrication mechanism; 651. oil guide pipe; 652. sliding sleeve; 653. sliding pipe; 654. conical head; 655. oil-coated ball; 656. buffer spring; 7. heat dissipation device; 71. heat dissipation cover; 72. mounting groove; 73. partition frame; 74. cooling fan; 75. heat dissipation groove; 76. dust net; 8. liquid level sensor; 9. mounting plate; 10. mounting hole. DETAILED DESCRIPTION

[0026] Example

[0027] refer to Figures 1 to 6The CVT gearbox described in this embodiment includes a chassis 1, a first transmission wheel set 2 is rotatably connected to one side of the chassis 1, a second transmission wheel set 3 is rotatably connected to the other side of the chassis 1, the first transmission wheel set 2 and the second transmission wheel set 3 are connected to each other through a transmission belt 4, a connecting shaft 5 is fixedly installed on one side of the first transmission wheel set 2 and the second transmission wheel set 3, the outer ends of the connecting shaft 5 pass through the chassis 1, a lubrication device 6 is fixedly installed on the top of the chassis 1, and heat dissipation devices 7 are fixedly installed on both sides of the lubrication device 6;

[0028] The lubricating device 6 comprises a lubricating oil tank 61, a refueling pipe 62 is fixedly installed on one side of the top of the lubricating oil tank 61, a sealing cover 63 is threadedly connected to the top of the refueling pipe 62, two sets of solenoid valves 64 are fixedly installed on both sides of the lubricating oil tank 61, the inner end of the solenoid valve 64 is connected to the bottom of the lubricating oil tank 61, and a lubricating mechanism 65 is fixedly installed on the outer end of the solenoid valve 64. By setting the lubricating device 6, the lubricating oil can be assisted in filling through the refueling pipe 62 during use. When the lubricating oil is filled, the sealing cover 63 is twisted to close the inside of the lubricating oil tank 61. During use, the lubricating mechanism 65 at the bottom of the lubricating oil tank 61 is used to assist in lubrication, and a heat dissipation device 7 is used during lubrication to assist in heat dissipation, so that the device has a better heat dissipation and lubrication effect.

[0029] refer to Figure 1-Figure 4 A liquid level sensor 8 is fixedly installed on one side of the top of the lubricating oil tank 61, and the detection end of the liquid level sensor 8 is arranged inside the lubricating oil tank 61. The liquid level sensor 8 is arranged to facilitate the detection of the internal lubricating oil level of the lubricating oil tank 61, and to facilitate the rapid supply of oil when the internal liquid level of the lubricating oil tank 61 is reduced, so as to facilitate the supply of oil to the lubricating oil tank 61.

[0030] refer to Figure 1-Figure 4 A mounting plate 9 is fixedly installed on one side of the chassis 1, and mounting holes 10 are opened at the four corners of the mounting plate 9. The mounting holes 10 are set as countersunk holes. The mounting holes 10 on the mounting plate 9 are set to facilitate the quick installation of the chassis 1. The mounting holes 10 can cooperate with bolts to assist in the quick disassembly and assembly of the chassis 1, which is convenient for quick disassembly of the chassis 1 and can improve the overall convenience of use of the CTV gearbox.

[0031] refer to Figure 1-Figure 4 and Figure 6The lubrication mechanism 65 includes an oil guide pipe 651, which is fixedly installed on the outer end of the solenoid valve 64. A sliding sleeve 652 is fixedly installed on the outer end of the oil guide pipe 651. A sliding pipe 653 is slidably connected to the inner side of the sliding sleeve 652. A buffer spring 656 is fixedly installed on one end of the sliding pipe 653 close to the sliding sleeve 652. The other end of the buffer spring 656 is fixedly connected to the inner side of the sliding sleeve 652. A conical head 654 is fixedly installed on the outer end of the sliding pipe 653. An oil-coated ball 655 is rotatably connected to the outer end of the conical head 654. The inner side of the oil-coated ball 655 is respectively connected to the first transmission wheel group 2 and the outer surface of the second transmission wheel group 3 are fitted and connected, and a lubrication mechanism 65 is provided, which can assist in guiding oil through the oil guide pipe 651 during use. At this time, the oil passes through the oil-coated ball 655 at the bottom conical head 654 for rolling and oiling. As the first transmission wheel group 2 and the second transmission wheel group 3 rotate, they can be automatically lubricated. The automatic lubrication design can improve the convenience of lubrication and the service life of the entire gearbox. The solenoid valve 64 can be flexibly switched on and off. When there is no need to add lubricating oil, the solenoid valve 64 can be closed to avoid waste of lubricating oil, which is convenient for the use of the gearbox.

[0032] refer to Figure 1-Figure 5 The heat dissipation device 7 includes a heat dissipation cover 71. The overall cross-sectional shape of the heat dissipation cover 71 is an isosceles trapezoid. A mounting groove 72 is provided in the middle of the outer side of the heat dissipation cover 71. A partition frame 73 is fixedly installed on the inner side of the mounting groove 72. A heat dissipation fan 74 is rotatably connected to the partition frame 73 in the mounting groove 72 on one side close to the first transmission wheel group 2 and the second transmission wheel group 3. The heat dissipation device 7 is provided, and the air circulation rate can be increased by starting the heat dissipation fan 74, thereby improving the overall heat dissipation effect of the device. By starting the heat dissipation fan 74, the operation of the heat dissipation fan 74 can increase the air circulation rate inside the chassis 1, thereby improving the heat dissipation effect inside the chassis 1, and further improving the service life of the gearbox.

[0033] refer to Figure 5 The upper and lower ends of the outer side of the heat dissipation cover 71 are both provided with heat dissipation grooves 75, and the inner side of the heat dissipation grooves 75 is connected with the interior of the chassis 1. The heat dissipation grooves 75 can be used to assist in increasing the air circulation rate during use, thereby improving the overall heat dissipation efficiency of the gearbox and improving the heat dissipation effect.

[0034] refer to Figure 1-Figure 5 A dustproof net 76 is also fixedly installed on the inner side of the heat dissipation groove 75, and a dustproof net 76 is also fixedly installed on the outer end of the partition frame 73. The dustproof net 76 can assist in dust prevention and prevent dust from entering the interior of the chassis 1, thereby improving the overall dustproof performance of the gearbox. A dustproof net 76 is also provided inside the partition frame 73 to further improve the dustproof performance.

[0035] Principle and advantages of use: By setting the lubrication device 6, the gearbox can be started and opened by starting the solenoid valve 64 during use. At this time, the oil guide pipe 651 is connected to the inside of the lubricating oil tank 61, and the oil in the lubricating oil tank 61 enters the inside of the sliding sleeve 652 and the sliding pipe 653 through the oil guide pipe 651. During the rotation of the first transmission wheel group 2 and the second transmission wheel group 3, the oil-coated ball 655 is intermittently contacted and squeezed by the first transmission wheel group 2 and the second transmission wheel group 3. The oil-coated ball 655 rotates to apply the oil to the outer surface of the first transmission wheel group 2 and the second transmission wheel group 3. Since the oil-coated ball 655 is intermittently resisted and collided by the first transmission wheel group 2 and the second transmission wheel group 3, the buffer spring 656 can be extended and retracted. The extension and retraction buffer of the buffer spring 656 can play a good buffering role. The extension and retraction activity of the sliding pipe 653 can vibrate the ball, which can promote the discharge of lubricating oil and apply lubricating oil. After the lubricating oil is applied, the solenoid valve 64 can be closed. The oil guide pipe 651 is closed to facilitate the regular automatic lubrication of the device. At the same time, when the lubricating oil level drops to a certain level, the lubricating oil level inside the lubricating oil tank 61 can be assisted by the liquid level sensor 8 to facilitate the filling of lubricating oil after the lubricating oil level drops, which can improve the service life of the overall gearbox during use and the overall convenience of use of the device. The automatic lubrication function can ensure that the friction elements inside the CVT gearbox are fully lubricated, reducing the need for manual lubrication, thereby reducing maintenance costs. A good automatic lubrication system can ensure the normal operation of the internal components of the CVT gearbox, reduce friction and wear, and thus extend the service life of the components. The automatic lubrication function can ensure that the CVT gearbox can maintain a good lubrication state under various working conditions, thereby improving the reliability and stability of the system. Good lubrication can reduce energy loss and improve transmission efficiency, so that the CVT gearbox has better performance and fuel economy;

[0036] By providing the heat dissipation device 7, the device can be operated by starting the heat dissipation fan 74 during use. When the heat dissipation fan 74 is in operation, it can absorb and send external air through the installation slot 72, and the external air can enter the interior of the chassis 1 through the bulk slot. After the air enters the interior of the chassis 1 for heat exchange, it can be discharged through the heat dissipation slot 75, which can improve the overall heat dissipation rate inside the gearbox. Good heat dissipation function can ensure that the CVT gearbox can effectively dissipate the heat generated during operation to avoid overheating, thereby improving the reliability and stability of the system. Effective heat dissipation can reduce the temperature of the internal components of the CVT gearbox, slow down the aging rate of the components, and extend the service life of the components. Through effective heat dissipation, the CVT gearbox can be maintained at a lower operating temperature, reduce friction loss, and improve transmission efficiency, so that the car has better performance and fuel economy. Good heat dissipation function can reduce the failure of the CVT gearbox caused by overheating and reduce maintenance costs.

Claims

1. A CVT gearbox, including a chassis, characterized in that: A first transmission wheel set is rotatably connected to one side of the chassis, and a second transmission wheel set is rotatably connected to the other side of the chassis. The first transmission wheel set and the second transmission wheel set are connected via a transmission belt. A connecting shaft is fixedly installed on one side of the first transmission wheel set and the second transmission wheel set. The outer ends of the connecting shafts pass through the chassis. A lubrication device is fixedly installed on the top of the chassis, and heat dissipation devices are fixedly installed on both sides of the lubrication device. The lubrication device includes a lubricating oil tank, a refueling pipe is fixedly installed on one side of the top of the lubricating oil tank, a sealing cover is threadedly connected to the top of the refueling pipe, two groups of solenoid valves are fixedly installed on both sides of the lubricating oil tank, the inner end of the solenoid valve is connected to the bottom of the lubricating oil tank, and the outer end of the solenoid valve is fixedly installed with a lubrication mechanism.

2. The CVT transmission according to claim 1, characterized in that: A liquid level sensor is fixedly mounted on one side of the top of the lubricating oil tank, and a detection end of the liquid level sensor is arranged inside the lubricating oil tank.

3. The CVT transmission according to claim 1, characterized in that: A mounting plate is fixedly mounted on one side of the chassis, and mounting holes are provided at four corners of the mounting plate, and the mounting holes are configured as countersunk holes.

4. The CVT transmission according to claim 1, characterized in that: The lubrication mechanism includes an oil guide pipe, which is fixedly installed on the outer end of the solenoid valve, a sliding sleeve is fixedly installed on the outer end of the oil guide pipe, a sliding pipe is slidably connected to the inner side of the sliding sleeve, a buffer spring is fixedly installed on one end of the sliding pipe close to the sliding sleeve, the other end of the buffer spring is fixedly connected to the inside of the sliding sleeve, a conical head is fixedly installed on the outer end of the sliding pipe, an oil-coated ball is rotatably connected to the outer end of the conical head, and the inner sides of the oil-coated ball are respectively fitted and connected to the outer surfaces of the first transmission wheel group and the second transmission wheel group.

5. The CVT transmission according to claim 1, characterized in that: The heat dissipation device includes a heat dissipation cover, the overall cross-sectional shape of the heat dissipation cover is an isosceles trapezoid, a mounting groove is opened in the middle of the outer side of the heat dissipation cover, a partition frame is fixedly installed on the inner side of the mounting groove, and a heat dissipation fan is rotatably connected to the side of the partition frame in the mounting groove close to the first transmission wheel group and the second transmission wheel group.

6. The CVT transmission according to claim 5, characterized in that: The upper end and the lower end of the outer side of the heat dissipation cover are both provided with heat dissipation grooves, and the inner side of the heat dissipation grooves is connected with the interior of the chassis.

7. The CVT transmission according to claim 6, characterized in that: A dustproof net is also fixedly installed on the inner side of the heat dissipation slot, and a dustproof net is also fixedly installed on the outer end of the partition frame.

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