Transmission auxiliary box of planetary reduction structure

Abstract

In order to solve the problem of unstable transmission in the prior art, the transmission auxiliary box of the planetary speed reduction structure comprises the transmission auxiliary box, the transmission auxiliary box comprises an auxiliary box shell, a main shaft and a locking plate, the main shaft and the locking plate are installed in the auxiliary box shell, three positioning pins are arranged on the locking plate, fixing bolts are symmetrically arranged on the two sides of each positioning pin, and the main shaft and the locking plate are arranged on the auxiliary box shell. Three-point positioning is reliable, the coaxiality of a transmission system is guaranteed, transmission is stable, and the locking plate is evenly loaded and high in bearing capacity.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission, in particular to a transmission sub-box with a planetary reduction structure. Background Art

[0002] Automobile mechanical transmissions with 8 forward gears and more than 8 gears generally have a sub-box, and the high gear, low gear and main gear of the sub-box are combined to form multiple gears. There are generally two types of sub-box structures, one is a planetary reduction structure and the other is a double intermediate shaft structure. The planetary reduction structure has the advantages of stable transmission and strong load-bearing capacity, and is relatively widely used in mainstream multi-speed transmission sub-boxes at home and abroad. However, the current planetary carrier is only supported by the bearing at the rear end. During the operation of the planetary gear, the planetary wheel gasket is easy to wear, resulting in a decrease in transmission efficiency.

[0003] In order to solve the above problems, the Chinese invention patent with patent number CN116398616A proposes a transmission auxiliary box planetary gear assembly, including a planetary gear and a rear cover housing; the planetary gear includes a planetary carrier assembly, a sun gear, a planetary gear, a planetary gear ring and other components; the planetary carrier assembly is composed of a fixedly connected front planetary carrier and a rear planetary carrier; the front planetary carrier is supported on two shafts through bearings; the rear planetary carrier is supported on the rear cover housing through bearings; the sun gear is evenly meshed with a number of planetary gears supported on the planetary gear shaft through bearings; and a number of planetary gears are meshed with the inner teeth of the planetary gear ring. However, the invention does not have a structure that can ensure smooth transmission, and the process structure is complex and inconvenient to assemble. Utility Model Content

[0004] The utility model mainly solves the problem of unstable transmission in the prior art and provides a transmission sub-box with a planetary reduction structure.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions:

[0006] A transmission sub-box with a planetary reduction structure includes a transmission sub-box, characterized in that the transmission sub-box includes a sub-box housing, a main shaft and a locking plate installed in the sub-box housing, three locating pins are provided on the locking plate, and fixing bolts are symmetrically provided on both sides of the locating pins. The utility model has reliable three-point positioning, ensures the coaxiality of the transmission system, stable transmission, and evenly loads the locking plate, so the bearing capacity is strong.

[0007] As a preferred solution, the auxiliary box housing is also provided with a high and low gear gear seat for supporting and controlling the high and low gear functions of the transmission.

[0008] As a preferred solution, a shifting gear sleeve is provided on the side of the high and low gear gear seat away from the main shaft, and the gear switching action is achieved by meshing with the corresponding gear on the main shaft.

[0009] As a preferred solution, a high-gear coupling tooth is provided on one side of the high- and low-gear gear seat close to the output flange, so as to provide a higher vehicle speed and power output.

[0010] As a preferred solution, a low gear engaging tooth is provided on the side of the high and low gear gear seat away from the output flange, which is used for low-speed driving and starting stages, and ensures smooth starting of the vehicle and comfort of low-speed driving by providing greater torque output.

[0011] As a preferred solution, the output end of the main shaft is provided with an output flange, and the input end of the main shaft is provided with a planet carrier and planetary gears installed in the planet carrier.

[0012] As a preferred solution, the output flange is a flange plate, and the cross-section shape of the flange plate is a disc shape, which can not only provide stable torque transmission and power output, but also effectively reduce energy loss and vibration.

[0013] As a preferred solution, the outer side of the planet carrier is also wrapped with a gear ring, which effectively cooperates with other gear components to ensure the reliability and safety of the transmission device under various working conditions.

[0014] As a preferred solution, the locking plate is also provided with a shift fork.

[0015] Therefore, the advantages of the utility model are:

[0016] The three-point positioning is reliable, ensuring the coaxiality of the transmission system and smooth transmission; the locking plate is evenly loaded and has a strong load-bearing capacity; the machining process is stable and easy to assemble; the auxiliary box shifting structure such as the shift fork and fork shaft is more conveniently arranged. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a transmission auxiliary box of the utility model.

[0018] Figure 2 It is a schematic diagram of a locking plate of the utility model.

[0019] In the figure: 1, auxiliary box housing; 2, main shaft; 3, locking plate; 4, high and low gear gear seats; 5, shift gear sleeve; 6, high gear engaging teeth; 7, low gear engaging teeth; 8, planetary carrier; 9, planetary gear; 10, ring gear; 11, output flange; 31, positioning pin; 32, fixing bolt; 33, shift fork. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0021] Embodiment 1:

[0022] Automobile mechanical transmissions with 8 forward gears and more than 8 gears generally have a sub-box, and the high gear, low gear and main gear of the sub-box are combined to form multiple gears. There are generally two types of sub-box structures, one is a planetary reduction structure and the other is a double intermediate shaft structure. The planetary reduction structure has the advantages of stable transmission and strong load-bearing capacity, and is relatively widely used in mainstream multi-speed transmission sub-boxes at home and abroad. However, the current planetary carrier is only supported by the bearing at the rear end. During the operation of the planetary gear, the planetary wheel gasket is easy to wear, resulting in a decrease in transmission efficiency.

[0023] When it comes to the design and optimization of automotive mechanical transmissions, the planetary reduction structure, as a key technical application, not only has significant advantages in improving transmission efficiency and stability, but also faces the challenge of continuous improvement and optimization. The utility model provides a transmission sub-box with a planetary reduction structure, including a transmission sub-box, the transmission sub-box includes a sub-box housing 1, a main shaft 2 installed in the sub-box housing 1, and a locking plate 3, three locating pins 31 are provided on the locking plate 3, and fixing bolts 32 are symmetrically provided on both sides of the locating pins 31. In the transmission sub-box of the utility model, the design of the main shaft 2 is crucial. The main shaft 2 is not only a hub connecting the various planetary gears and the transmission chain, but also bears the rotation and torque transmission of the entire transmission system. In order to ensure the stability and durability of the main shaft 2, the main shaft 2 of the utility model will be made of high-strength alloy steel material, and its surface hardness and wear resistance will be improved through precision machining and heat treatment processes.

[0024] The locking plate 3 is a key component inside the auxiliary box, and its main function is to ensure the smooth switching of the transmission between different gears. In the design of the utility model, three locating pins 31 are provided on the locking plate 3. These locating pins 31 are installed in precise positions and supported by fixing bolts 32, which effectively ensure the stability and precise matching of various key components inside the transmission. The design of the locating pins 31 is not only to enhance the stability of the structure, but more importantly, it can maintain accurate transmission ratio and gear selection during high-speed operation and long-term use.

[0025] Compared with the traditional planetary reduction structure auxiliary box, the utility model has obvious technical advantages and innovative features in many aspects. First, by optimizing the structural design and material selection of the auxiliary box housing 1, the overall weight can be effectively reduced and the rigidity and durability of the overall structure can be improved. Secondly, the structural installation method using the positioning pin 31 and the fixing bolt 32 not only simplifies the assembly process, but also significantly reduces the wear of parts and the generation of noise, thereby improving the working efficiency and reliability of the transmission.

[0026] A high and low gear seat 4 is also provided on the auxiliary box housing 1. A shift gear sleeve 5 is provided on the side of the high and low gear seat 4 away from the main shaft 2. A high gear combination tooth 6 is provided on the side of the high and low gear seat 4 close to the output flange 11. A low gear combination tooth 7 is provided on the side of the high and low gear seat 4 away from the output flange 11.

[0027] The high and low gear seats 4 are located inside the transmission sub-box, and their main function is to support and control the high and low gear functions of the transmission. These gear seats ensure smooth gear switching under different driving conditions through precise manufacturing processes and optimized layouts, thereby providing the power output and fuel efficiency required by the driver. On the sub-box housing 1, the high and low gear seats 4 are usually arranged on the side close to the output flange 11. This position design helps to reduce the length and complexity of the transmission chain, while optimizing the overall transmission efficiency. The side of the high and low gear seats 4 away from the main shaft 2 is provided with a shifting gear sleeve 5, which realizes the gear switching action by engaging with the corresponding gears on the main shaft 2.

[0028] On one side near the output flange 11, the high-and-low gear holder 4 is provided with a high-gear coupling tooth 6 and a low-gear coupling tooth 7, respectively. The design and layout of these coupling teeth are to ensure the transmission efficiency and power output under different driving conditions. The high-gear coupling tooth 6 is usually used to provide a higher vehicle speed and power output, and is suitable for driving conditions that require a higher speed, such as on highways. The low-gear coupling tooth 7 is more suitable for low-speed driving and starting stages, and ensures the smooth start of the vehicle and the comfort of low-speed driving by providing a greater torque output.

[0029] Compared with the traditional transmission design, the optimized design of the high and low gear seat 4 and its related components brings multiple technical advantages. First, by optimizing the matching of the gear and the gear seat, the energy loss and mechanical noise in the transmission process can be effectively reduced, and the overall transmission efficiency can be improved. Secondly, the use of precise manufacturing and high-strength materials enhances the durability and reliability of the gear assembly and extends the overall service life.

[0030] The main shaft 2 plays a key role in the planetary reduction structure transmission sub-box. It connects the various planetary gears 9 and the transmission chain and is responsible for transmitting power and torque. The design of the main shaft 2 must take into account the requirements of high strength, durability and transmission efficiency. Usually, the main shaft 2 is made of high-strength alloy steel material, which is precision machined and heat-treated to improve its surface hardness and wear resistance, thereby ensuring long-term stable operation.

[0031] In the design of the utility model, the output end of the main shaft 2 is provided with an output flange 11, which usually adopts a disc-shaped flange structure, that is, the cross-section shape of the flange is disc-shaped. This design can not only provide stable torque transmission and power output, but also effectively reduce energy loss and vibration, thereby improving the efficiency of the entire transmission system. The design and processing accuracy of the output flange 11 are crucial to maintaining the stability and reliability of the transmission device, especially under high-speed operation and high-torque conditions. The input end of the main shaft 2 is provided with a planetary carrier 8 and a planetary gear 9 installed in the planetary carrier 8. In addition to the output flange 11, the input end of the main shaft 2 is also designed with a planetary carrier 8, and the planetary gear 9 is installed in the planetary carrier 8. The outer side of the planetary carrier 8 is also wrapped with a gear ring 10. These gear rings 10 effectively cooperate with other gear components to ensure the reliability and safety of the transmission device under various working conditions. The design and layout of the planetary carrier 8 have an important impact on the overall performance of the transmission device, especially in improving the driving experience and the power output of the vehicle. The main shaft 2 realizes the speed transmission of different gears by cooperating with the planetary carrier 8 and the planetary gear 9 installed in the planetary carrier 8. The planetary gear 9 is usually made of high-strength material, and through the precise gear design, it ensures stability and durability under various working conditions. The interaction between the main shaft 2 and the planetary gear 9 enables the entire transmission system to work smoothly and efficiently, while ensuring the accuracy of the transmission ratio and the maximization of the transmission efficiency. The output flange 11 is a flange, and the cross-section shape of the flange is disc-shaped. Compared with the traditional transmission design, the optimized design of the main shaft 2 in this new planetary reduction structure transmission sub-box brings significant technical advantages and innovative applications. First, the use of the disc-shaped flange output flange 11 reduces the energy loss in the transmission, improves the transmission efficiency and driving smoothness. Secondly, the arrangement of the outer ring gear 10 of the planetary carrier 8 enhances the stability and reliability of the transmission system, while reducing the noise and vibration levels.

[0032] This technical advantage is not only reflected in performance improvement, but also provides more room for innovation for automakers and technical developers. Especially in the context of the rise of electric vehicles and hybrid vehicles, this efficient and reliable transmission design is particularly important to meet the growing market demand and environmental protection and energy-saving regulations.

[0033] The locking plate 3 in the present application is also provided with a shift fork 33. In modern automobile engineering, the design and optimization of the transmission system plays a vital role, among which the locking plate 3 and the shift fork 33 equipped therewith are one of the key components. As an important component inside the transmission, the locking plate 3 not only affects the performance and efficiency of the transmission system, but is also directly related to the driving experience and the overall reliability of the vehicle.

[0034] First, the function of the locking plate 3 is to ensure that the transmission can operate stably and provide the required driving force under specific working conditions. It effectively controls the transmission of power and the output of torque by cooperating with other mechanical components inside the transmission, such as gear assemblies and bearings. This design is not only to improve transmission efficiency, but also to reduce energy loss and mechanical loss, thereby extending the service life of the transmission and reducing maintenance costs.

[0035] At the same time, the locking plate 3 also assumes the important function of the shift fork 33. As a part of the transmission operating system, the shift fork 33 is responsible for converting the driver's shifting action into the movement of the gears and shafts inside the transmission to achieve smooth switching between different gears. The accuracy and reliability of this mechanical operation directly affect the driver's driving experience and the power output effect of the vehicle. Therefore, the design of the shift fork 33 must take into account the flexibility and durability of operation to meet the needs under different driving conditions.

[0036] During the operation of the transmission system, the locking plate 3 and the shift fork 33 work closely together to ensure the stability and reliability of the transmission under high-speed and high-torque conditions. The locking plate 3 can effectively reduce friction and wear through its specific structure and material selection, thereby improving the overall transmission efficiency. At the same time, the design of the shift fork 33 takes into account the driver's operating habits and the movement characteristics of the mechanical components inside the transmission to ensure a smooth and reliable shifting process.

[0037] With the advancement of technology and changes in market demand, the design of the locking plate 3 and the shift fork 33 is also constantly evolving and optimizing. Modern manufacturers tend to use advanced materials and manufacturing processes, such as high-strength alloy steel and precision casting technology, to improve the performance and durability of these key components.

[0038] Embodiment 2:

[0039] In modern automotive engineering, the design and optimization of the transmission system is crucial to the performance and driving experience of the vehicle. Among them, the locking plate 3, as one of the key components inside the transmission sub-box, plays an important role in ensuring the normal operation of the transmission system. Its main function is to achieve effective transmission of driving force and control of torque output by fixing the planetary gears or other transmission elements when switching between different gears.

[0040] In the transmission sub-box, the switching between low gear and high gear involves different mechanical structures and transmission mechanisms. For example, in the low gear state, the locking plate 3 will fix the ring gear 10 to the sub-box housing 1, and the ring gear 10 will be stationary through the cooperation of the gear sleeve and the coupling teeth, thereby realizing the planetary system reduction transmission. This design can not only effectively reduce energy loss, but also improve the overall transmission efficiency and system reliability.

[0041] When the transmission is switched to high gear, the locking plate 3 functions as a fixed gear ring 10 to achieve a 1:1 output transmission ratio through the high gear combination gear 6 and the planet carrier 8. The design of the locking plate 3 in this state must not only ensure the stability of the transmission system at high speed, but also take into account the simplification and efficiency improvement of the assembly process to meet the needs of the modern automobile manufacturing industry for high-quality and high-efficiency products.

[0042] The innovation of this application is to optimize the design of the locking plate 3 of the auxiliary box planetary reduction structure. By ensuring that the locking plate 3 meets the standard in terms of load-bearing capacity, its structure is simplified, and the overall assembly efficiency is further improved. This not only helps to reduce manufacturing costs, but also shortens the production cycle, thereby enhancing the advantages of automobile manufacturers in market competition.

[0043] The development of modern automobile technology has brought higher requirements to the design and manufacturing of the locking plate 3 and its equipped mechanical parts. For example, the use of advanced materials and manufacturing processes, such as high-strength alloy steel and precision casting technology, not only improves the durability and reliability of the locking plate 3, but also reduces its own weight, further improving the overall vehicle fuel efficiency and environmental performance.

[0044] In general, as a key component inside the transmission sub-box, the locking plate 3 plays an indispensable role in modern automotive engineering. Its optimized design not only affects the performance and efficiency of the transmission system, but is also directly related to the comfort of the driving experience and the overall reliability of the vehicle. With the continuous advancement of technology and changes in market demand, the design of the locking plate 3 will continue to evolve, driving automotive engineering towards a more efficient and reliable direction.

Claims

1. A transmission sub-box with a planetary reduction structure, comprising a transmission sub-box, characterized in that: The transmission auxiliary box comprises an auxiliary box housing, a main shaft installed in the auxiliary box housing and a locking plate. Three positioning pins are arranged on the locking plate, and fixing bolts are symmetrically arranged on both sides of the positioning pins.

2. The transmission sub-box of the planetary reduction structure according to claim 1 is characterized in that: The auxiliary box housing is also provided with high and low gear seats.

3. The transmission sub-box of the planetary reduction structure according to claim 2 is characterized in that: A shifting gear sleeve is provided on one side of the high and low gear seat away from the main shaft.

4. The transmission sub-box of the planetary reduction structure according to claim 2 is characterized in that: A high-gear combining tooth is arranged on one side of the high-low gear seat close to the output flange.

5. A transmission sub-box with a planetary reduction structure according to claim 2, 3 or 4, characterized in that: A low-gear combining tooth is arranged on one side of the high-low gear seat away from the output flange.

6. The transmission sub-box of the planetary reduction structure according to claim 1, characterized in that: An output flange is provided at the output end of the main shaft, and a planet carrier and planetary gears installed in the planet carrier are provided at the input end of the main shaft.

7. A transmission sub-box with a planetary reduction structure according to claim 6, characterized in that: The output flange is a flange plate, and the cross-section shape of the flange plate is a disc shape.

8. The transmission sub-box of the planetary reduction structure according to claim 6 is characterized in that: The outer side of the planet carrier is also wrapped with a gear ring.

9. The transmission sub-box of the planetary reduction structure according to claim 1, characterized in that: The locking plate is also provided with a shift fork.

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