A transfer case and oil pump hanger apparatus and vehicle

Abstract

This utility model discloses a transfer case and oil pump suspension device and a vehicle, including a transfer case, an oil pump, a suspension bracket, a frame connecting bracket, and a suspension assembly; the transfer case and the oil pump are connected by a spline and positioned by a stop on the suspension bracket; the suspension bracket is detachably fixed to the frame connecting bracket, which is located on the chassis floor plate. This utility model can absorb and attenuate vibrations, impacts, and excitation forces under various operating conditions, and has a simple structure, small footprint, is easy to manufacture, and is easy to install.

Description

Technical Field

[0001] This utility model relates to the automotive field, and more particularly to a transfer case and oil pump suspension device and a vehicle. Background Technology

[0002] In an automotive transmission system, the power output of the engine needs to be distributed to various drive shafts or power components such as oil pumps in a certain proportion through the transfer case. The gears and shafts inside the transfer case rotate at high speed and need to be fixedly connected to the frame so that the transfer case can reliably form an integral part with the frame and move together with the vehicle. This connection structure is called the transfer case suspension system.

[0003] During actual vehicle operation, the periodic excitation forces generated by vehicle starting, acceleration, braking, steering, and the rotation of the universal joint will cause the transfer case to sway, vibrate, and impact. Additionally, the movement of the gear pairs inside the transfer case also generates periodic excitation forces. Therefore, the transfer case suspension system must be able to dampen vibrations and impacts in all directions under all operating conditions to prevent premature damage to the transfer case and its connecting structures, ensuring the normal operation of the entire vehicle's drivetrain.

[0004] Existing transfer case suspension devices include patents such as "Engineering Machinery and its Transfer Case Suspension Device" (CN201646388U). This transfer case suspension device comprises two main components: a tie rod assembly and a support assembly. The support assembly is located between the lower part of the transfer case and the vehicle frame, supporting the transfer case and its fixed components, while also damping the transmission of vibrations to the vehicle frame. The tie rod assembly is located between the upper part of the transfer case and the vehicle frame, controlling the amplitude of the transfer case's sway to ensure that the sway is within a controlled range under various operating conditions. One end of the tie rod assembly is fixedly connected to the vehicle frame via a rubber support, and the other end is fixedly connected to the upper part of the transfer case. The tie rods are symmetrically arranged on both sides of the transfer case.

[0005] Existing transfer case suspension devices, such as the patent "A Transfer Case Suspension Structure and Crane" (CN220850665U), are used to mount the transfer case onto a vehicle frame. They include a first bracket mounted on the side wall of the transfer case; a suspension assembly located below the center of gravity of the transfer case, connecting the first bracket to the vehicle frame; and a second bracket mounted on the top wall of the transfer case, equipped with a vertical shaft and a control arm, located above the center of gravity of the transfer case. One end of the second bracket has an elastic element that mates with the vertical shaft hole, and the other end is connected to the vehicle frame. This invention uses the first bracket to connect the suspension assembly, transmitting the weight and vibration of the transfer case. The second bracket connects the control arm, transmitting the vibration of the transfer case. The suspension assembly attenuates the vibration between the transfer case and the vehicle frame, and the control arm improves the stress distribution on the lower suspension assembly.

[0006] However, existing transfer case suspension systems often have the following problems: numerous connecting parts, complex assembly process, high manufacturing cost, and multiple adjustments to the length and position of the tie rods are required to ensure left-right symmetry of the transfer case; the tie rods are scattered, occupying a large space, and the length of the tie rods needs to be selected according to the overall vehicle layout requirements, resulting in poor standardization and difficulty in management.

[0007] Therefore, it is necessary to develop new types of transfer cases and oil pump suspension devices to overcome the above problems. Utility Model Content

[0008] Purpose of the utility model: In view of the shortcomings and defects of the existing technology, this utility model provides a transfer case and oil pump suspension device and vehicle that can absorb and attenuate vibration, impact and excitation force under various working conditions, and has a simple structure, small space occupation, easy manufacturing and easy installation.

[0009] Technical solution: The present invention relates to a transfer case and oil pump suspension device, characterized in that: it includes a transfer case, an oil pump, a suspension bracket, a frame connecting bracket, and a suspension assembly; the transfer case and the oil pump are connected by a spline and positioned by a stop of the suspension bracket; the suspension bracket is detachably fixed on the frame connecting bracket, and the frame connecting bracket is located on the frame base plate.

[0010] The suspension bracket includes a curved plate, a vertical plate, a stiffening plate, and a mounting plate.

[0011] Two of the aforementioned curved plates are symmetrically arranged on both sides of the upright plate, and a stiffening plate is provided between the curved plates to increase the structural strength of the suspension bracket; two seat holes are opened on the curved plates, and a suspension assembly is installed in each seat hole.

[0012] The upright plate has four transfer case mounting holes, and the transfer case is fixed to the suspension bracket by bolts; the upright plate has four oil pump mounting holes, and the oil pump is fixed to the suspension bracket by bolts; the upright plate has a stop, which cooperates with the stop on the transfer case and the oil pump for positioning.

[0013] The suspension assembly includes an upper pad, a lower pad, a pad plate, a locking bolt, a nut, and a cotter pin.

[0014] The upper pad and the lower pad together form a suspended rubber pad, with the upper pad located above the upper surface of the curved plate and the lower pad located below the plate.

[0015] The upper pad has a T-shaped structure, and the lower pad has a groove. Both the upper and lower pads have through mounting holes in the middle. The locking bolt passes through the pad, lower pad, plate, bend plate, and upper pad in sequence along the mounting holes and connects to the frame bracket. The locking bolt is connected to the cotter pin by a nut.

[0016] A vehicle characterized by using the transfer case and oil pump suspension device of this utility model.

[0017] Beneficial effects: Compared with the prior art, this utility model has the following significant advantages: The device of this utility model can effectively absorb and attenuate vibrations, impacts, and excitation forces from the transfer case and chassis under various operating conditions, avoiding damage to the transfer case and connecting structures, and ensuring the normal operation of the vehicle's transmission system. This suspension device can also be used for the installation of an oil pump. It has a simple structure, is easy to manufacture and install, occupies little space, and has low manufacturing costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 4 This is a schematic diagram of the structure of the suspension bracket of this utility model;

[0022] Figure 5 This is a schematic diagram of the suspension assembly of this utility model;

[0023] In the diagram, 1 is the transfer case; 2 is the oil pump; 3 is the suspension bracket; 31 is the bend plate; 32 is the upright plate; 33 is the stiffening plate; 34 is the mounting plate; 4 is the frame connecting bracket; 5 is the suspension assembly; 51 is the upper pad; 52 is the lower pad; 53 is the pad plate; 54 is the locking bolt; 55 is the nut; and 56 is the cotter pin. Detailed Implementation

[0024] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0025] This utility model relates to the following: Transfer case: An engine power distribution device that can output power to the rear axle, or simultaneously to the front / rear axle. Oil pump: A power element in a hydraulic transmission system that converts mechanical energy into fluid pressure energy. Mount: A power element used to reduce and control the transmission of vibrations from the engine or other components, and to provide support. NVH: An abbreviation for Noise, Vibration, and Harshness. Chassis: The base of a car, generally composed of two longitudinal beams and several cross beams, supported on the wheels via the suspension system, front axle, and rear axle. Gear: A mechanical element with teeth on its rim that continuously meshes to transmit motion and power.

[0026] like Figure 1 , 23. The transfer case and oil pump suspension device of this utility model includes a transfer case 1, an oil pump 2, a suspension bracket 3, a frame connecting bracket 4, and a suspension assembly 5. The transfer case 1 and the oil pump 2 are connected by a spline and positioned by the stop of the suspension bracket 3. The suspension bracket 3 is detachably fixed on the connecting bracket 4, and the connecting bracket 4 is welded to the frame base plate.

[0027] like Figure 4 The suspension bracket 3 of this utility model includes a curved plate 31, a vertical plate 32, a stiffening plate 33, and a mounting plate 34. Two curved plates 31 are symmetrically welded to both sides of the vertical plate 32, and the stiffening plate 33 increases the structural strength of the suspension bracket. Each curved plate 31 has two mounting holes, and each mounting hole houses a suspension assembly 5. The vertical plate 32 has four transfer case mounting holes, and the transfer case 1 is fixed to the suspension bracket 3 with bolts. The vertical plate 32 also has four oil pump mounting holes, and the oil pump 2 is fixed to the suspension bracket 3 with bolts. The vertical plate 32 also has a stop, which engages with the stops on the transfer case 1 and the oil pump 2 for positioning.

[0028] The transfer case of this invention involves high-speed rotation of the internal gear pair and shaft system. To ensure reliable operation of the transmission system and prevent wear on the input shaft spline and hydraulic pump shaft, the suspension bracket 3 requires high machining precision. The two sides of the upright plate 32 serve as the mounting surfaces for the transfer case 1 and the oil pump 2, requiring parallelism and perpendicularity relative to the mounting stop. The tolerance grade of the mounting stop diameter cannot be lower than that of the mounting stop diameters of the transfer case 1 and the oil pump 2. Additionally, the upper surface of the bent plate 31 is the suspension mounting surface, requiring flatness and perpendicularity relative to the mounting stop. Furthermore, to prevent welding deformation from affecting the accuracy of the aforementioned mating dimensions, the mounting stop, seat hole, transfer case mounting hole, and oil pump mounting hole require post-weld machining. When painting the surface of the suspension bracket 3, a hard film anti-rust oil process is used for the mounting stop to avoid uneven paint surfaces from affecting machining precision.

[0029] like Figure 5 The suspension assembly 5 of this utility model includes an upper pad 51, a lower pad 52, a pad plate 53, a bolt 54, a nut 55, and a cotter pin 56. The suspension pad is a split structure. During assembly, the upper pad is placed above the flat surface of the curved plate, and the lower pad is placed below the mounting plate 34. The upper and lower pads have different structures and are used together. The upper pad has a T-shaped structure, and the lower pad has a groove. The middle parts of the upper and lower pads are respectively provided with through mounting holes. The locking bolt 54 passes through the mounting holes in sequence through the pad plate 53, the lower pad 52, the mounting plate 34, the curved plate 31, the upper pad 51, and the connecting bracket 4, and is then tightened by the nut 55 and the cotter pin 56. The suspension pad is made of a combination of steel frame and rubber material. The rubber material is determined according to the load, and different rubber materials have different stiffness characteristics.

[0030] During actual vehicle operation, the transfer case tends to move or sway forward, backward, or left, right due to inertia when starting, accelerating, turning, or braking. The suspension device proposed in this invention can effectively mitigate and absorb the vibration and impact generated by this lateral movement or motion. Similarly, when the vehicle travels over bumpy roads, the suspension device can effectively attenuate and absorb the longitudinal vibration generated by the transfer case and oil pump. In addition, the axial excitation force generated by the operation of the gear pairs and shaft system inside the transfer case can also be fully absorbed and mitigated by the suspension pads.

[0031] Alternatively, when the upper shaft of the transfer case outputs power to the oil pump, the connecting bracket 4 can be eliminated, and the suspension bracket can be directly fixed to the chassis floor. The two curved plates 31 can be optimized into a single horizontal plate with four sets of suspension mounting holes. In this invention, the suspension assembly is suspended below the connecting bracket 4, and the assembly sequence is connecting bracket + upper pad + suspension bracket + lower pad. Alternatively, a lifting structure can be used, with the assembly sequence being upper pad + suspension bracket + lower pad + connecting bracket. This invention uses bolts + flat washers + slotted nuts + cotter pins to lock the rubber suspension, or it can use bolts + flat washers + spring washers + nuts or double nuts for fastening.

[0032] This utility model discloses a transfer case and an oil pump that share a single mounting bracket. The mounting bracket includes a suspension bracket and a frame connection bracket. Both the mounting bracket and the frame connection bracket have mounting holes for installing rubber suspension mounts. One end of the bracket connects to the frame, and the other end connects to the transfer case. The rubber suspension mount is a split structure; the upper mount is a T-shaped boss, and the lower mount has a groove. The upper and lower mounts work together. Both upper and lower mounts have mounting holes for bolts. The rubber suspension mount has certain stiffness characteristics, specifically radial stiffness and axial stiffness. The stiffness and compression of the rubber suspension mount are determined based on the load of the transfer case and oil pump transmission system.

[0033] This invention provides a novel transfer case and oil pump suspension device that effectively absorbs and dampens vibrations, impacts, and excitation forces generated during vehicle starting, acceleration, steering, braking, and the operation of the gear pairs within the transfer case, thereby reducing the NVH (noise, vibration, and harshness) values ​​of the transmission system. Compared to traditional transfer case suspension devices, it has a simpler structure, is easier to assemble, and has lower manufacturing costs. The transfer case and oil pump share a single mounting bracket, occupying less space, improving assembly efficiency, and reducing production costs.

[0034] In summary, the transfer case and oil pump suspension device proposed in this invention can effectively attenuate and absorb vibrations, impacts, and excitation forces from all directions, thereby significantly reducing the NVH values ​​of the transfer case and oil pump drive system. The use of separate upper and lower rubber pads for mounting on the upper and lower sides of the bracket mounting holes simplifies the assembly process and reduces manufacturing costs. The transfer case and oil pump share a single suspension bracket, further reducing production costs, improving assembly efficiency, and minimizing layout requirements.

Claims

1. A transfer case and oil pump hanger apparatus characterized by: It includes a transfer case (1), an oil pump (2), a suspension bracket (3), a frame connecting bracket (4), and a suspension assembly (5); the transfer case (1) and the oil pump (2) are connected by a spline and positioned by the stop of the suspension bracket (3); the suspension bracket (3) is detachably fixed on the frame connecting bracket (4), and the frame connecting bracket (4) is located on the frame base plate.

2. The driveline and oil pump hanger assembly of claim 1, wherein: The suspension bracket (3) includes a curved plate (31), a vertical plate (32), a stiffening plate (33), and a mounting plate (34).

3. The driveline and oil pump hanger assembly of claim 2 wherein: Two curved plates (31) are symmetrically arranged on both sides of the upright plate (32), and a stiffening plate (33) is provided between the curved plates (31) to increase the structural strength of the suspension bracket; two seat holes are provided on the curved plates (31), and a suspension assembly (5) is installed in each seat hole.

4. The transfer case and oil pump suspension device according to claim 3, characterized in that: The upright plate (32) has four transfer case mounting holes, and the transfer case (1) is fixed to the suspension bracket (3) by bolts; the upright plate (32) has four oil pump mounting holes, and the oil pump (2) is fixed to the suspension bracket (3) by bolts; the upright plate (32) has a stop, which cooperates with the stop on the transfer case (1) and the oil pump (2) for positioning.

5. The driveline and oil pump hanger assembly of claim 1, wherein: The suspension assembly (5) includes an upper pad (51), a lower pad (52), a pad plate (53), a locking bolt (54), a nut (55), and a cotter pin (56).

6. The driveline and oil pump hanger assembly of claim 5 wherein: The upper pad (51) and lower pad (52) together form a suspended rubber pad. The upper pad (51) is located above the upper plane of the curved plate (31), and the lower pad (52) is located below the plate (34).

7. The driveline and oil pump hanger assembly of claim 6 wherein: The upper pad (51) has a T-shaped structure, and the lower pad (52) has a groove. Both the upper pad (51) and the lower pad (52) have through mounting holes in the middle. The locking bolt (54) passes through the pad plate (53), the lower pad (52), the plate (34), the bent plate (31), the upper pad (51), and the frame connecting bracket (4) in sequence along the mounting hole. The locking bolt (54) is connected to the cotter pin (56) through the nut (55).

8. A vehicle characterized by: Use the transfer case and oil pump suspension device according to any one of claims 1-7.

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