Integrated speed reducer

Abstract

The utility model discloses an integrated speed reducer, which relates to the technical field of speed reducers, and comprises a shell, and a threaded hole, a pressing groove, a bearing mounting groove and a gear selecting shaft hole are formed in the shell; the parking system assembly comprises a bearing, a supporting plate, a pressing block, a push rod, a gear selecting shaft and a P-gear clamping block, the gear selecting shaft is connected with the gear selecting shaft hole in a clamped mode through a lining, the bearing is clamped with the bearing installation groove and installed on the gear selecting shaft, a through hole matched with the threaded hole is formed in the supporting plate, and the pressing block is clamped with the pressing groove; the P-gear gear is clamped to the P-gear clamping block; and the differential mechanism assembly is connected to the parking system assembly through an intermediate shaft. The speed reducer and the parking system are structurally integrated, the integration level is high, cost is reduced, the failure rate is low, light weight of the vehicle is achieved, and manufacturability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reducers, in particular to an integrated reducer. Background Art

[0002] The existing light truck reducer assembly is generally separated from the parking system as two independent parts, but the reducer and the parking system have a mechanical connection structure. The two independent parts require high-precision matching in the connection structure. Over time, due to factors such as wear and thermal expansion, these precise matches may have increased gaps, leading to an increase in failure rate. The existing reducer and parking system structures occupy a large space in the internal structure of the car. The reducer and parking system usually require a large physical space to accommodate complex gears and actuators. The weight of these components will also affect the overall weight of the vehicle, which in turn affects fuel efficiency or power consumption.

[0003] For example, the patent with publication number CN111677831A discloses a two-speed reducer with a P gear structure for a pure electric vehicle, including an electronic shifter and a two-speed reducer body, a P gear locking shaft is installed on one side of the electronic shifter, a P gear fixing guide plate is provided at one end of the P gear locking shaft, a P gear guide block torsion spring is provided on one side of the P gear fixing guide plate, a P gear locking guide block is provided at one end of the P gear guide block torsion spring, a P gear locking guide block is provided at one end, a P gear locking plate is provided on the lower side of the P gear locking guide block, and a P gear locking wheel is clamped on one side of the P gear locking plate. Utility Model Content

[0004] Technical problems to be solved by utility models

[0005] In view of the technical problems that the existing reducer and parking system structures have a high failure rate, occupy a large space and affect the overall weight of the vehicle, the utility model provides an integrated reducer, which integrates the reducer and parking system structures with high integration, reduced costs, low failure rate, and is conducive to lightweighting of the vehicle and improving processability.

[0006] Technical Solution

[0007] In order to solve the above problems, the technical solution provided by the utility model is:

[0008] An integrated speed reducer comprises a shell, which is provided with a threaded hole, a pressure groove, a bearing mounting groove and a gear selection shaft hole; a parking system assembly comprises a bearing, a support plate, a pressure block, a push rod, a gear selection shaft and a P gear block, the gear selection shaft is clamped with the gear selection shaft hole through a bushing, the bearing is clamped with the bearing mounting groove, the bearing is installed on the gear selection shaft, the support plate is provided with a through hole matching the threaded hole, the pressure block is clamped with the pressure groove; a P gear is clamped with the P gear block; a differential assembly is connected to the parking system assembly through an intermediate shaft.

[0009] The housing is the outer frame of the entire system, which is used to house all the internal components, providing a solid shell to protect the internal components from external factors. The accurate installation and positioning of the internal components are ensured by setting features such as threaded holes, pressure grooves, bearing mounting grooves and gear selector shaft holes. The parking system assembly includes bearings, support plates, pressure blocks, push rods, gear selector shafts and P-blocks. Bearings: provide support for the gear selector shaft to ensure smooth rotation of the gear selector shaft. Support plates: fixed by through holes that match the threaded holes on the housing to maintain the stability of the entire system. Pressure blocks: engage with the pressure grooves to fix the position of the support plates and ensure the rigidity of the entire structure. Push rods: used to push the P-block when needed to achieve the parking function. Gear selector shaft: engages with the gear selector shaft hole through a bushing to ensure precise fit. P-block: used to fix the P-block gear to achieve the parking function. The P-block gear is engaged with the P-block block. When the vehicle enters the P-block, the P-block gear will engage with a fixed point in the transmission system to prevent the vehicle from moving. Through precise engagement, the P gear is ensured to firmly fix the vehicle in the parking state. The differential assembly is connected to the parking system assembly through an intermediate shaft, distributing torque to the wheels on the left and right sides and allowing them to rotate at different speeds. Through integrated design, the volume and weight of the entire system are reduced, improving the vehicle's handling and fuel efficiency. Integrating multiple components in a single housing reduces the required space and simplifies the installation and maintenance process. Reducing the number of parts simplifies the production process, thereby reducing costs. Fewer moving parts means fewer wear points, which reduces the possibility of failure. Reducing weight helps improve fuel efficiency or the endurance of electric vehicles. Integrated design makes production more standardized, facilitating mass production and quality control.

[0010] Optionally, a protrusion is provided on the inner side of the gear select shaft hole to limit the gear select arm of the gear select shaft.

[0011] The selector shaft hole and the selector arm limiter cooperate with the protrusion, which ensures that the selector shaft is in the correct position through the limiter cooperation to prevent accidental movement during driving. Limit the range of motion of the selector shaft to prevent excessive force from acting on the selector shaft and causing damage. Selector shaft hole: The selector shaft hole is located inside the housing and is used to install the selector shaft. Selector arm: There is a selector arm on the selector shaft, which is used to interact with the shift mechanism to achieve different gear shifts. Protrusion: The protrusion facing the inner side of the selector shaft hole cooperates with the selector arm to play a limiter role. Precise positioning: The cooperation between the protrusion and the selector arm ensures that the selector shaft is in the correct gear position and improves the accuracy of gear shifting. Prevent accidental movement: Through the limiter cooperation, the selector shaft can be kept in the predetermined position even if the vehicle encounters bumps or vibrations during driving to avoid accidental gear shifting. Improve reliability: Limiting the range of motion of the selector shaft helps reduce failures caused by improper operation and improve the reliability and durability of the system.

[0012] Optionally, an annular groove for accommodating a sealing ring is provided on the inner wall of the gear select shaft hole, and a sealing ring is provided on the outer periphery of the gear select shaft.

[0013] Shift shaft hole: The shift shaft hole is located inside the housing and is used to install the shift shaft. Ring groove: The inner wall of the shift shaft hole is provided with a ring groove for installing a sealing ring. Sealing ring: The sealing ring is installed in the ring groove and is in close contact with the outer periphery of the shift shaft to form a seal. Dustproof and waterproof: The sealing ring effectively blocks the entry of external impurities, keeps the internal components clean, and extends the service life. Prevent oil leakage: The sealing ring prevents the leakage of lubricating oil, ensures that the internal components are fully lubricated, and reduces wear. Improve reliability: Through effective sealing, failures caused by internal contamination or poor lubrication can be reduced, and the reliability and durability of the system can be improved.

[0014] Optionally, the housing includes a front shell and a rear shell, and the front shell and the rear shell are fixedly connected via housing through holes and bolts.

[0015] Front shell and rear shell: The shell is composed of two parts, namely the front shell and the rear shell. Shell through hole: There is a through hole on the joint surface of the front shell and the rear shell for inserting bolts. Bolts: Use bolts to pass through the shell through holes to fasten the front shell and the rear shell together. Easy to assemble: The split design makes it easier to assemble on the production line. Different components can be installed inside the front shell and the rear shell respectively, and then the two can be easily combined. Easy to maintain: When it is necessary to replace internal components, you only need to remove the bolts to open the shell, which is convenient for maintenance and replacement of parts. Improve reliability: By fastening with bolts, it can be ensured that the shell will not loosen during use, which improves the stability and reliability of the system.

[0016] Optionally, the shell-jointing through hole is connected to the wall of the shell through a rounded structure.

[0017] Reduce stress concentration: Stress dispersion: The rounded corner structure can disperse the stress around the shell through-hole and reduce the phenomenon of local stress concentration. Improve strength: By reducing stress concentration, the overall strength of the shell can be improved and the service life can be extended. Improve processing quality: Easy to process: The rounded corner structure is usually easier to process than the sharp edge, which helps to improve the processing quality and efficiency. Reduce burrs: The rounded corner structure helps to reduce the burrs generated during the processing and improve the quality of the finished product.

[0018] Optionally, the front shell and the rear shell are respectively integrally formed structures.

[0019] Improved strength: One-piece molding can improve the overall strength and rigidity of the shell and reduce stress concentration. Reduced welding or connection points: One-piece molding reduces the number of parts that need to be welded or connected by other means, reducing the potential risk of leakage.

[0020] Optionally, reinforcing ribs are provided outside the shell.

[0021] The ribs can increase the structural stability of the housing and prevent deformation under load. Reduce vibration: By increasing the rigidity of the housing, vibration and noise can be reduced, improving the smooth operation of the system.

[0022] Optionally, the P-block is rotatably connected to the housing via a rotating shaft.

[0023] Parking function: By rotating the P block to engage with the fixed point in the transmission system, the vehicle can be effectively prevented from moving. Smooth operation: The rotation connection of the shaft can ensure smooth and unobstructed operation of the P block. Improved reliability: By ensuring that the P block can accurately engage with the fixed point, the reliability and safety of the parking system are improved.

[0024] Beneficial Effects

[0025] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0026] In the technical solution provided by the utility model, a threaded hole, a pressure groove, a bearing mounting groove and a gear selection shaft hole are provided in the shell; the parking system assembly includes a bearing, a support plate, a pressure block, a push rod, a gear selection shaft and a P gear block, the gear selection shaft is clamped with the gear selection shaft hole through a bushing, the bearing is clamped with the bearing mounting groove, the bearing is installed on the gear selection shaft, the support plate is provided with a through hole matching the threaded hole, the pressure block is clamped with the pressure groove, and the parking system assembly is integrated into the reducer shell, with high integration, reduced cost, low failure rate, conducive to lightweighting of the vehicle, and improved processability. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic cross-sectional structure diagram of an integrated reducer proposed in an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of a partial cross-sectional structure of an integrated reducer proposed in an embodiment of the utility model;

[0029] 1. Differential; 2. Second intermediate shaft; 3. First intermediate shaft; 4. Input shaft; 5. P gear; 6. Parking system assembly; 601. Bearing; 602. Support plate; 603. Pressure block; 604. Push rod; 605. P block block; 606. Shift shaft; 607. Shift arm; 7. Housing; 701. Threaded hole; 702. Pressure groove; 703. Bearing mounting groove; 704. Reinforcement rib; 705. Housing through hole; 706. Protrusion; 707. Shift shaft hole. DETAILED DESCRIPTION

[0030] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.

[0031] Example

[0032] Combined with Figure 1-2 , an integrated speed reducer, a housing 7 is provided with a threaded hole 701, a pressure groove 702, a bearing mounting groove 703 and a gear selection shaft 606 hole. Parking system assembly 6. P gear 5 is clamped to P gear block 605. Differential 1 is connected to parking system assembly 6 through an intermediate shaft. Parking system assembly 6, including bearing 601, support plate 602, pressure block 603, push rod 604, gear selection shaft 606 and P gear block 605, gear selection shaft 606 and gear selection shaft 606 hole are clamped through a bushing, bearing 601 is clamped with bearing mounting groove 703, bearing 601 is installed on gear selection shaft 606, support plate 602 is provided with a through hole matching with threaded hole 701, pressure block 603 is clamped with pressure groove 702. The speed reducer comprises a differential 1, a second intermediate shaft 2, a first intermediate shaft 3, an input shaft 4, a P gear 5, a parking system assembly 6, a front housing of the speed reducer and a rear housing of the speed reducer. The second intermediate shaft 2 and the first intermediate shaft 3 are collectively referred to as intermediate shafts.

[0033] Specifically, the P gear 5 is assembled on the input shaft 4 in a spline form, and is used to mesh with a fixed point in the transmission system to achieve the parking function. The two ends of the rotating shaft are fixed in the rotating shaft holes of the front and rear housings 7 of the reducer, and are used to connect the P gear block 605 so that the P gear block 605 can rotate around the rotating shaft. The P gear block 605 is connected to the housing 7 through the rotating shaft. The P gear block 605 is assembled on the rotating shaft and can rotate on the rotating shaft. Through the action of the swing spring, it is usually in a position away from the P gear 5. The swing spring is assembled on the rotating shaft and the P gear block 605, and is used to support the P gear block 605 in the direction of the reducer, that is, to keep the P gear block 605 away from the P gear 5. The support plate 602 is fixed to the upper end surface of the front housing 7 of the reducer by two screws, and is used to support the two side limits of the pressure block 603 and the push rod 604 assembly. The pressing block 603 is interference-fitted into the corresponding groove on the front housing 7 of the reducer, and is used to limit the radial position of the push rod 604 assembly. The push rod 604 assembly includes the push rod 604, the push rod 604 spring and the conical sleeve. When the push rod 604 moves, the push rod 604 spring is compressed, and the push rod 604 spring pushes the conical sleeve to move in the pushing direction.

[0034] Under normal circumstances, the P-block block 605 contacts the tapered sleeve of the push rod 604 assembly. When the tapered sleeve moves, the P-block block 605 is pressed downward into the corresponding groove of the P-block gear 5 to realize the parking function. The gear selection shaft 606 assembly includes a gear selection shaft 606, which is connected to the vehicle control box. There is a limit hole on the gear selection arm 607, and there is a limit pin in the limit hole, which is mainly used to limit the rotation direction of the gear selection shaft 606. A protrusion 706 that cooperates with the gear selection arm 607 of the gear selection shaft 606 is provided on the inner side of the gear selection shaft 606 hole. The gear selection arm 607 is fixed with a support pin, and the push rod 604 assembly is sleeved on the support pin and limited by a retaining ring.

[0035] The inner wall of the gear selector shaft 606 hole is provided with a ring groove for accommodating a sealing ring, and a sealing ring is provided on the outer periphery of the gear selector shaft 606. The gear selector shaft 606 assembly is equipped with a bushing, an O-ring and a bearing 601, which are installed in the corresponding holes of the reducer front housing 7 for the rotation and sealing of the gear selector shaft 606.

[0036] The housing 7 comprises a front housing and a rear housing, and the front housing and the rear housing are fixedly connected through a housing through hole 705 and bolts. The housing through hole 705 is connected to the wall of the housing 7 through a rounded structure.

[0037] The front shell and the rear shell are integrally formed structures. A reinforcing rib 704 is arranged outside the shell 7 .

[0038] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. An integrated reducer, characterized in that: include The housing is provided with a threaded hole, a pressing groove, a bearing mounting groove and a gear selection shaft hole; The parking system assembly includes a bearing, a support plate, a pressure block, a push rod, a gear selection shaft and a P gear block, wherein the gear selection shaft is clamped with the gear selection shaft hole through a bushing, the bearing is clamped with the bearing mounting groove, the bearing is mounted on the gear selection shaft, a through hole matching the threaded hole is provided on the support plate, and the pressure block is clamped with the pressure groove; A P gear, clamped to the P gear clamping block; The differential assembly is connected to the parking system assembly through an intermediate shaft.

2. An integrated reducer according to claim 1, characterized in that: A protrusion is provided on the inner side of the gear selection shaft hole and is limitedly matched with the gear selection arm of the gear selection shaft.

3. The integrated reducer according to claim 1, characterized in that: The inner wall of the gear selection shaft hole is provided with an annular groove for accommodating a sealing ring, and the outer periphery of the gear selection shaft is provided with a sealing ring.

4. The integrated reducer according to claim 1, characterized in that: The housing comprises a front housing and a rear housing, and the front housing and the rear housing are fixedly connected via housing through holes and bolts.

5. The integrated reducer according to claim 4, characterized in that: The shell-joining through hole is connected to the wall of the shell through a rounded structure.

6. The integrated reducer according to claim 4, characterized in that: The front shell and the rear shell are respectively integrally formed structures.

7. The integrated reducer according to claim 1, characterized in that: The shell body is provided with reinforcing ribs outside.

8. The integrated reducer according to claim 1, characterized in that: The P gear block is rotatably connected in the housing via a rotating shaft.

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