Continuously variable transmission

Abstract

The utility model relates to the technical field of transmissions, in particular to a continuously variable transmission which comprises a base, and a transmission body is installed on the top face of the base. A mounting cavity is formed in the bottom surface of the base, and a limiting groove is formed in the inner wall of the mounting cavity; an oil injection structure is installed on the transmission body and comprises a shell, the shell is fixedly installed on the front face of the transmission body, an oil injection opening is formed in the top face of the shell, a guide pipe is arranged on the bottom face of the shell, a fixing plate is fixedly installed on the inner side of the shell, and a through groove is formed in the top face of the fixing plate. The diameter of the rubber plug is larger than the inner diameter of the through groove, the blocking effect of the rubber plug on the through groove can be guaranteed in the using process, the rubber plug can be driven to be close to the fixing plate by rotating the second hand rotating disc, the attaching effect between the rubber plug and the fixing plate can be guaranteed, accurate adjustment of the oil injection speed is further improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of transmission technology, specifically a continuously variable transmission (CVT). Background Technology

[0002] Currently, most power transmission processes, both domestically and internationally, require solutions to speed change issues. Mechanical transmissions in civilian vehicles, engineering vehicles, textile machinery, wind power generation, machine tools, and other machinery all require speed changes, and continuously variable transmissions (CVTs) are currently the leading option in the transmission field.

[0003] In response, Chinese patent application number CN202223612739.7 discloses a motor-driven transmission assembly, including a base plate, a buffer mechanism disposed above the base plate, a transmission assembly body mounted above the buffer mechanism, a lubrication mechanism disposed at the front end of the transmission assembly body, a hinge rod hinged above a movable block, a movable plate hinged above the hinge rod, a connecting rod mounted above the movable plate, the connecting rod extending above to the outside of a fixed cavity, and the top end of the connecting rod connecting to the bottom end of the transmission assembly body. By providing a buffer mechanism above the base plate, the interaction of the buffer mechanisms can buffer the transmission assembly body during use, thereby providing shock absorption and protection. This makes the internal electronic components of the transmission assembly less susceptible to damage from vibration during use, thus greatly improving the service life of the transmission assembly.

[0004] The transmission can adjust the oil injection speed by using a fixed hole and a plug. However, in actual use, since the diameter of the plug is the same as the inner diameter of the fixed hole, the plug will age and deform after a long period of use, making it impossible for the plug to seal the fixed hole, which will affect the adjustment of the oil injection speed.

[0005] Therefore, in order to solve the above problems, a continuously variable transmission (CVT) is proposed. Utility Model Content

[0006] The purpose of this utility model is to provide a continuously variable transmission (CVT) to solve the problem mentioned in the background art that in the prior art, the transmission can adjust the oil injection speed through the cooperation of the fixing hole and the plug. However, in actual use, since the diameter of the plug is the same as the inner diameter of the fixing hole, the plug will age and deform after a long period of use, making it impossible for the plug to seal the fixing hole, which in turn affects the adjustment of the oil injection speed.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a continuously variable transmission, comprising: a base, wherein the transmission body is mounted on the top surface of the base;

[0008] The base has a mounting cavity on its bottom surface, and a limit groove is formed on the inner wall of the mounting cavity.

[0009] The transmission body is equipped with an oil filling structure, which includes a housing. The housing is fixedly installed on the front of the transmission body. The top surface of the housing is provided with an oil filling port, and the bottom surface of the housing is provided with a conduit. A fixing plate is fixedly installed on the inner side of the housing. A through groove is opened on the top surface of the fixing plate. A first handwheel is movably installed on the top surface of the housing through a sealed bearing. A mounting plate is fixedly connected to the bottom end of the first handwheel. A mounting plate is movably installed on the inner side of the mounting plate. A rubber plug is provided on the bottom surface of the mounting plate. A second handwheel is rotatably connected to the inside of the top surface of the mounting plate.

[0010] Preferably, a noise reduction structure is installed on the inner side of the base. The noise reduction structure includes a sound-absorbing pad, which is installed on the inner side of the mounting cavity. Limiting blocks are integrally formed at both ends of the sound-absorbing pad.

[0011] Preferably, the bottom end of the conduit communicates with the interior of the transmission body.

[0012] Preferably, the first hand-operated disc penetrates the top surface of the housing, and the mounting disc is located inside the housing and above the fixing plate.

[0013] Preferably, the outer wall of the mounting plate is slidably connected to the inner wall of the mounting disc.

[0014] Preferably, the bottom end of the rubber plug protrudes from the bottom surface of the mounting plate, the bottom surface of the rubber plug is in contact with the top surface of the fixing plate, and the rubber plug is vertically aligned with the through groove.

[0015] Preferably, the upper end of the second handwheel passes through the first handwheel, and the second handwheel is threadedly connected to the first handwheel.

[0016] Preferably, the limiting block is slidably installed on the inner side of the limiting groove.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the diameter of the rubber plug set in this utility model is larger than the inner diameter of the through groove, which can ensure the sealing effect of the rubber plug on the through groove during use, and rotating the second hand disc can drive the rubber plug closer to the fixed plate, which can ensure the fit between the rubber plug and the fixed plate, further improving the precise adjustment of the oil injection speed and extending the service life.

[0018] 1. This utility model, by incorporating an oil filling structure, allows oil to be added to the housing through the oil filling port before use. When oil needs to be added to the transmission body, rotating the first handwheel rotates the mounting plate, which in turn rotates the rubber plug via the mounting plate. The rubber plug rotates relative to the fixed plate, releasing the blockage of the through groove, allowing oil from the housing to flow through the through groove into the transmission body, thus achieving oil filling of the transmission body. Furthermore, the oil filling speed can be adjusted by changing the sealing area of ​​the rubber plug on the through groove. Hold the first handwheel... Then rotate the second handwheel, so that the second handwheel rotates inside the first handwheel. The second handwheel is threadedly connected to the first handwheel. When the second handwheel rotates, it will move downward inside the first handwheel. The second handwheel can push the mounting plate downward, so that the mounting plate slides downward inside the mounting plate. The mounting plate with the rubber plug extends from the bottom surface of the mounting plate, so that the rubber plug fits more tightly against the top surface of the fixing plate, so as to ensure the sealing effect of the rubber plug on the through groove and prevent the oil from dripping downward by itself, causing too much oil inside the transmission body and causing problems in use.

[0019] 2. This utility model incorporates a noise reduction structure. A sound-absorbing pad is installed within the mounting cavity, aligning the limiting block with the limiting groove. Pushing the sound-absorbing pad causes the limiting block to move within the limiting groove, securing it in place. This ensures stable installation of the sound-absorbing pad within the limiting groove, guaranteeing the stability of the noise reduction structure on the transmission body. During installation, bolts are used to fix the transmission body to the mounting surface. The sound-absorbing pad is placed between the mounting surface and the transmission body, mitigating vibrations during operation and thus reducing noise generation. Attached Figure Description

[0020] Figure 1 This is a front view schematic diagram of the structure of this utility model;

[0021] Figure 2 This is an exploded view of the structure of this utility model;

[0022] Figure 3 This is a front sectional view of the outer shell of this utility model;

[0023] Figure 4 This is a front sectional view of the installation disc of this utility model;

[0024] Figure 5 This is an exploded cross-sectional view of the mounting disc and mounting plate of this utility model.

[0025] In the diagram: 1. Base; 11. Mounting cavity; 12. Limiting groove; 13. Transmission body; 2. Oil filling structure; 21. Outer shell; 22. Oil filling port; 23. Guide tube; 24. Fixing plate; 25. Through groove; 26. First handwheel; 27. Mounting plate; 28. Mounting plate; 29. ​​Rubber plug; 210. Second handwheel; 3. Noise reduction structure; 31. Sound damping pad; 32. Limiting block. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-5 One embodiment provided by this utility model:

[0028] The base 1, the gearbox body 13 and the outer shell 21 used in this application are products that can be purchased directly from the market. Their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be described in detail here.

[0029] A continuously variable transmission (CVT) includes: a base 1, on the top surface of which a transmission body 13 is mounted;

[0030] The bottom surface of the base 1 is provided with a mounting cavity 11, and the inner wall of the mounting cavity 11 is provided with a limiting groove 12;

[0031] An oil filling structure 2 is installed on the transmission body 13. The oil filling structure 2 includes a housing 21, which is fixedly installed on the front of the transmission body 13. An oil filling port 22 is provided on the top surface of the housing 21, and a guide tube 23 is provided on the bottom surface of the housing 21. A fixing plate 24 is fixedly installed on the inner side of the housing 21. A through groove 25 is opened on the top surface of the fixing plate 24. A first handwheel 26 is movably installed on the top surface of the housing 21 through a sealed bearing. A mounting plate 27 is fixedly connected to the bottom end of the first handwheel 26. The inner side of the mounting plate 27... A mounting plate 28 is movably mounted on the side. A rubber plug 29 is provided on the bottom surface of the mounting plate 28. A second hand-operated rotary disc 210 is rotatably connected to the inside of the top surface of the mounting plate 28. The diameter of the bottom end of the rubber plug 29 is larger than the inner diameter of the through groove 25. This ensures that the rubber plug 29 seals the through groove 25 during use. Rotating the second hand-operated rotary disc 210 can move the rubber plug 29 closer to the fixed plate 24, ensuring the fit between the rubber plug 29 and the fixed plate 24. This further improves the precision of oil injection speed adjustment and extends service life.

[0032] Furthermore, a noise reduction structure 3 is installed on the inner side of the base 1. The noise reduction structure 3 includes a sound-absorbing pad 31, which is installed on the inner side of the mounting cavity 11. The two ends of the sound-absorbing pad 31 are integrally formed with limiting blocks 32. The sound-absorbing pad 31 is installed in the mounting cavity 11 so that the limiting blocks 32 are aligned with the limiting groove 12. Then, the sound-absorbing pad 31 is pushed, which will drive the limiting blocks 32 to move in the limiting groove 12, so that the limiting blocks 32 are stuck in the limiting groove 12. The sound-absorbing pad 31 can be stably installed in the limiting groove 12 to ensure the installation stability of the noise reduction structure 3 on the transmission body 13. During installation, the transmission body 13 is fixed to the mounting surface with bolts. The sound-absorbing pad 31 can be placed between the mounting surface and the transmission body 13 to reduce the shaking generated during the operation of the device, thereby reducing the generation of noise.

[0033] Furthermore, the bottom end of the conduit 23 is connected to the interior of the transmission body 13, and the oil in the housing 21 can flow into the transmission body 13 through the conduit 23.

[0034] Furthermore, the first hand-held rotating disc 26 penetrates the top surface of the outer casing 21, and the mounting disc 27 is located inside the outer casing 21 and above the fixing plate 24. The mounting disc 27 can drive the rubber plug 29 to move on the upper side of the fixing plate 24.

[0035] Furthermore, the outer wall of the mounting plate 28 is slidably connected to the inner wall of the mounting disk 27, allowing the mounting plate 28 to move stably up and down within the mounting disk 27.

[0036] Furthermore, the bottom end of the rubber plug 29 protrudes from the bottom surface of the mounting plate 27, the bottom surface of the rubber plug 29 is in contact with the top surface of the fixing plate 24, and the rubber plug 29 is aligned vertically with the through groove 25. The rubber plug 29 can block the through groove 25 to prevent the oil in the housing 21 from flowing into the transmission body 13 on its own, so that the first hand dial 26 can be operated to control the oil injection speed.

[0037] Furthermore, the upper end of the second hand-operated disc 210 passes through the first hand-operated disc 26, and the second hand-operated disc 210 is threadedly connected to the first hand-operated disc 26. Rotating the second hand-operated disc 210 can cause it to move up and down within the first hand-operated disc 26, thereby adjusting the bonding strength between the rubber plug 29 and the fixing plate 24, and thus ensuring the sealing effect of the rubber plug 29 on the through groove 25.

[0038] Furthermore, the limiting block 32 is slidably installed on the inner side of the limiting groove 12. The limiting block 32 and the limiting groove 12 cooperate with each other, making the installation of the sound-absorbing pad 31 in the mounting cavity 11 convenient and stable, and facilitating the replacement of the sound-absorbing pad 31 when it is deformed.

[0039] Working principle: Before use, oil can be added to the housing 21 through the oil inlet 22, and the noise reduction pad 31 can be installed in the mounting cavity 11 so that the limiting block 32 is aligned with the limiting groove 12. Then push the noise reduction pad 31, and the noise reduction pad 31 will drive the limiting block 32 to move in the limiting groove 12, so that the limiting block 32 is stuck in the limiting groove 12. The noise reduction pad 31 can be stably installed in the limiting groove 12 to ensure the installation stability of the noise reduction structure 3 on the transmission body 13. During installation, the transmission body 13 is fixed to the mounting surface with bolts. The noise reduction pad 31 can be placed between the mounting surface and the transmission body 13 to reduce the shaking generated during the operation of the device, thereby reducing the generation of noise.

[0040] When it is necessary to add oil to the transmission body 13, rotating the first handwheel 26 will rotate the mounting plate 27. The mounting plate 27 can rotate the rubber plug 29 via the mounting plate 28. The rubber plug 29 can then rotate relative to the fixed plate 24, which can release the blockage of the through groove 25, allowing the oil in the housing 21 to flow through the through groove 25 and the conduit 23 into the transmission body 13, thus realizing the oil filling of the transmission body 13. The oil filling speed can be adjusted by adjusting the sealing area of ​​the rubber plug 29 on the through groove 25. Hold the first handwheel 26 and rotate the second handwheel 210 so that the second handwheel 210... The first handwheel 26 rotates within the first handwheel 26, and the second handwheel 210 is threadedly connected to the first handwheel 26. When the second handwheel 210 rotates, it moves downward within the first handwheel 26. The second handwheel 210 can push the mounting plate 28 downward, causing the mounting plate 28 to slide downward within the mounting plate 27. The mounting plate 28, with the rubber plug 29, extends from the bottom surface of the mounting plate 27, allowing the rubber plug 29 to fit more tightly against the top surface of the fixing plate 24. This ensures the sealing effect of the rubber plug 29 on the through groove 25, preventing oil from dripping downward and causing excessive oil inside the transmission body 13, which could lead to usage problems.

[0041] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. An infinitely variable transmission, comprising: The base (1) is provided with a transmission body (13) on the top surface thereof; It is characterized in that: The bottom surface of the base (1) is provided with a mounting cavity (11), and a limiting groove (12) is formed in the inner wall of the mounting cavity (11); The transmission body (13) is provided with an oil injection structure (2), the oil injection structure (2) comprises an outer shell (21), the outer shell (21) is fixedly installed on the front surface of the transmission body (13), the top surface of the outer shell (21) is provided with an oil injection port (22), the bottom surface of the outer shell (21) is provided with a conduit (23), the inner side of the outer shell (21) is fixedly installed with a fixed plate (24), the top surface of the fixed plate (24) is provided with a through groove (25), the top surface of the outer shell (21) is movably installed with a first hand rotating disc (26) through a sealing bearing, the bottom end of the first hand rotating disc (26) is fixedly connected with a mounting disc (27), the inner side of the mounting disc (27) is movably installed with a mounting plate (28), the bottom surface of the mounting plate (28) is provided with a rubber plug (29), and the top surface of the mounting plate (28) is rotatably connected with a second hand rotating disc (210).

2. A continuously variable transmission according to claim 1, characterised in that: The inner side of the base (1) is provided with a noise reduction structure (3), the noise reduction structure (3) comprises a sound-absorbing pad (31), the sound-absorbing pad (31) is installed on the inner side of the mounting cavity (11), and the both ends of the sound-absorbing pad (31) are integrally formed with limiting blocks (32).

3. A continuously variable transmission according to claim 1, wherein: The bottom end of the conduit (23) is communicated with the inside of the transmission body (13).

4. A continuously variable transmission according to claim 1, wherein: The first hand rotating disc (26) penetrates the top surface of the outer shell (21), the mounting disc (27) is located on the inner side of the outer shell (21) and on the upper side of the fixed plate (24).

5. A continuously variable transmission according to claim 1, wherein: The outer wall of the mounting plate (28) is slidably connected with the inner wall of the mounting disc (27).

6. A continuously variable transmission according to claim 1, wherein: The bottom end of the rubber plug (29) is exposed from the bottom surface of the mounting disc (27), the bottom surface of the rubber plug (29) is attached to the top surface of the fixed plate (24), and the rubber plug (29) is aligned with the through groove (25) in up and down directions.

7. A continuously variable transmission according to claim 1, wherein: The upper end of the second hand rotating disc (210) penetrates the first hand rotating disc (26), and the second hand rotating disc (210) is threadedly connected with the first hand rotating disc (26).

8. A continuously variable transmission according to claim 2, wherein: The limiting blocks (32) are slidably installed on the inner side of the limiting groove (12).

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